阅读说明：本技术 一种多级液压倍增滑轮垂直升降式登高平台消防车 (Multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck ) 是由 李祥啟 于 2021-09-09 设计创作，主要内容包括：本发明实施例公开了一种多级液压倍增滑轮垂直升降式登高平台消防车,属于消防和救援装备技术领域,包括汽车底盘,所述汽车底盘尾部铰接安装有伸缩臂,所述伸缩臂的顶端设有回转平台,所述回转平台上安装有作业臂,所述作业臂的一段安装有工作斗；所述汽车底盘上安装有翻转液压油缸,所述汽车底盘上靠近所述汽车的驾驶室位置左右各安装有前液压支腿,所述伸缩臂上远离所述汽车的驾驶室位置左右各安装有后液压支腿,所述汽车底盘上设有辅助支撑油缸,所述汽车底盘尾端位置左右各安装有过渡液压油缸。本发明解决了现有高空消防车最大高度救援半径小、最大救援高度受液压油缸传动形式限制大的技术问题,广泛应用于高空消防或救援中。(The embodiment of the invention discloses a multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck, which belongs to the technical field of fire fighting and rescue equipment and comprises a truck chassis, wherein the tail part of the truck chassis is hinged with a telescopic arm, the top end of the telescopic arm is provided with a rotary platform, the rotary platform is provided with an operation arm, and one section of the operation arm is provided with a working bucket; the automobile chassis is provided with a turnover hydraulic oil cylinder, front hydraulic support legs are respectively arranged on the left side and the right side of the position, close to a cab of an automobile, of the automobile chassis, rear hydraulic support legs are respectively arranged on the left side and the right side of the position, far away from the cab of the automobile, of the telescopic arm, the automobile chassis is provided with an auxiliary support oil cylinder, and transition hydraulic oil cylinders are respectively arranged on the left side and the right side of the tail end position of the automobile chassis. The invention solves the technical problems that the maximum height rescue radius of the existing high-altitude fire truck is small, and the maximum rescue height is greatly limited by the transmission form of the hydraulic oil cylinder, and is widely applied to high-altitude fire fighting or rescue.)

1. A multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck comprises a truck chassis and is characterized in that a telescopic arm is hinged to the tail of the truck chassis, a rotary platform is arranged at the top end of the telescopic arm, an operation arm is mounted on the rotary platform, and a working bucket is mounted at one section of the operation arm; the automobile chassis is provided with a turnover hydraulic oil cylinder, one end of the turnover hydraulic oil cylinder is hinged to the automobile chassis, the other end of the turnover hydraulic oil cylinder is hinged to the telescopic arm, front hydraulic support legs are mounted on the automobile chassis and close to the left and right of the cab position of an automobile, rear hydraulic support legs are mounted on the telescopic arm and far away from the left and right of the cab position of the automobile, an auxiliary support oil cylinder is arranged on the automobile chassis, the extending direction of a piston rod of the auxiliary support oil cylinder is vertical upward, and transition hydraulic oil cylinders are mounted on the left and right of the tail end position of the automobile chassis.

2. The multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 1, wherein the working arm comprises a first fixed support, one end of the first fixed support is connected with a second fixed support, the other end of the first fixed support is provided with a first opening, a first sliding support driven by a first power mechanism is slidably mounted in the first fixed support, the first sliding support extends out of one end of the first opening and is provided with a balance weight, one end, far away from the first fixed support, of the second fixed support is provided with a second opening, a second sliding support driven by a second power mechanism is slidably mounted in the second fixed support, and the second sliding support extends out of one end of the second opening and is provided with the working hopper.

3. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck as claimed in claim 2, wherein the second fixing bracket is mounted on the first fixing bracket through a hinge shaft, and a positioning pin driven by a third power mechanism is arranged between the second fixing bracket and the first fixing bracket.

4. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 3, wherein a supporting arm is fixedly mounted at one end of the first fixing support close to the second fixing support, a supporting rope wheel is rotatably mounted on the supporting arm, a hoisting mechanism is arranged at the position of the first fixing support close to the first opening, a hoisting arm is arranged on the second fixing support, a hoisting steel wire rope is arranged among the hoisting mechanism, the supporting rope wheel and the hoisting arm, and one end of the hoisting arm, far away from a hoisting point of the hoisting steel wire rope, is hinged and mounted on the second fixing support.

5. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 4, wherein a first limiting block for limiting the vertical position of the lifting arm is arranged on the second fixing support, and a second limiting block for limiting the lifting point of the lifting arm to be lower than the outer plane of the second fixing support is arranged on the second fixing support.

6. The multi-stage hydraulic multiplication pulley vertical lifting type elevating platform fire truck as claimed in claim 1, wherein the telescopic arm comprises several stages of telescopic cylinders which are sequentially sleeved together, each stage of telescopic cylinder comprises several telescopic joints which are sleeved together, each stage of telescopic cylinder is connected with a wire rope hydraulic lifting device, the wire rope hydraulic lifting device of the first stage of telescopic cylinder is arranged in the outermost telescopic joint, the wire rope hydraulic lifting device of the next stage of telescopic cylinder is arranged in the innermost telescopic joint of the previous stage of telescopic cylinder, the wire rope hydraulic lifting device comprises a lifting hydraulic cylinder, the cylinder body of the lifting hydraulic cylinder is fixedly arranged at the bottom of the corresponding telescopic joint, a fixed pulley block is arranged on the cylinder body of the lifting hydraulic cylinder, a movable pulley block is arranged on the piston rod of the lifting hydraulic cylinder, and a lifting wire rope is arranged between the lifting hydraulic cylinder and the corresponding telescopic joint, one end of the lifting steel wire rope is fixed, and the other end of the lifting steel wire rope is fixed on the innermost telescopic joint of the telescopic cylinder after passing through the movable pulley block and the fixed pulley block; the outer-most telescopic joint of the rear-stage telescopic cylinder is sleeved in the inner-most telescopic joint of the front-stage telescopic cylinder, an oil pipe conveying device used for supplying oil to the rear-stage telescopic cylinder is installed in the inner-most telescopic joint of the front-stage telescopic cylinder, the working bucket is installed at the top of the inner-most telescopic joint of the last-stage telescopic cylinder, and the rear hydraulic support leg is installed on the outer surface of the outer-most telescopic joint of the first-stage telescopic cylinder.

7. The multi-stage hydraulic multiplication pulley vertical elevating platform fire truck of claim 6, wherein the bottom of the outermost expansion joint of the first stage expansion cylinder and the bottom of the innermost expansion joint of the previous stage expansion cylinder are each provided with a rope distributing wheel for distributing the hoisting wire rope of the corresponding crown block to the corresponding position.

8. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 7, characterized in that wall penetrating wheels are mounted at the bottoms of the telescopic joints except for the outermost telescopic joint of the first stage telescopic cylinder, bottom steering wheels are mounted at the bottoms of the inner sides of the outermost telescopic joint of the first stage telescopic cylinder and the innermost telescopic joint of the previous stage telescopic cylinder, and top steering wheels are mounted at the tops of the inner sides of the telescopic joints except for the innermost telescopic joint of the last stage telescopic cylinder.

9. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 8, wherein the wall penetrating wheel penetrates through the corresponding telescopic joint, and the lifting steel wire rope is wound around the wall penetrating wheel at least two turns from the outside of the corresponding telescopic joint and enters the inside of the telescopic joint.

10. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 9, wherein the hoisting steel wire rope of each stage of telescopic cylinder is wound through a corresponding movable pulley block and a fixed pulley block, then sequentially wound through a corresponding rope distributing wheel, a bottom steering wheel, an outermost top steering wheel and a wall penetrating wheel of an adjacent telescopic joint and finally fixed at a position above the wall penetrating wheel of the innermost telescopic joint.

11. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 10, wherein a swing arm is arranged between two adjacent telescopic joints, one end of the swing arm is hinged to the outer telescopic joint, the other end of the swing arm is provided with an inclined guide surface, a roller is arranged on the swing arm close to one end of the inclined guide surface, an adjusting screw is connected to a flange at the top end of the outer telescopic joint in a threaded manner, the end of the adjusting screw abuts against the inclined guide surface, and under the action of the adjusting screw, the outer edge of the roller abuts against the outer surface of the inner telescopic joint.

12. The multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to any one of claims 6 to 11, wherein the oil pipe conveying device comprises a mounting bracket, a core barrel driven by a fourth power mechanism is rotatably mounted on the mounting bracket, a partition plate is arranged in the core barrel and divides an inner cavity of the core barrel into an oil inlet cavity and an oil return cavity, an oil inlet pipe communicated with the oil inlet cavity is fixedly mounted on the core barrel, an oil return pipe communicated with the oil return cavity is fixedly mounted on the core barrel, the oil inlet cavity is connected with the oil inlet pipeline through a rotary joint, the oil return cavity is connected with the oil return pipeline through another rotary joint, a web disc is fixedly mounted on the outer surface of the core barrel, a double-groove wheel disc is fixedly mounted on the web disc, the core barrel, the web disc and the double-groove wheel disc are coaxially arranged, and an oil inlet rubber pipe and an oil return rubber pipe are respectively coiled in the double-groove wheel disc, one end of the oil inlet rubber tube is connected with the oil inlet tube, and one end of the oil return rubber tube is connected with the oil return tube.

13. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 12, characterized in that a guide wheel is rotatably mounted on the mounting bracket, a floating wheel is arranged below the guide wheel, and the oil inlet rubber tube and the oil return rubber tube are both connected with a lifting hydraulic cylinder of a next stage telescopic cylinder after passing through the guide wheel and the floating wheel.

14. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck according to claim 13, wherein a first sensor and a second sensor are arranged on the mounting bracket, the first sensor is positioned below the guide wheel and above the floating wheel, the second sensor is positioned below the floating wheel, and the first sensor and the second sensor are both connected with the fourth power mechanism.

15. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire fighting truck according to claim 14, wherein an extension spring is arranged between the floating wheel and a mounting bracket, one end of the extension spring is fixed on the floating wheel, and the other end of the extension spring is fixed on the mounting bracket.

16. The multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire fighting truck according to claim 15, wherein the fourth power mechanism comprises a motor mounted on the fixed support, an outer gear ring is fixedly mounted on the web plate, a transmission shaft is rotatably mounted on the mounting support, a driving gear meshed with the outer gear ring is mounted at one end of the transmission shaft, and the other end of the transmission shaft is in transmission connection with the motor.

Technical Field

The embodiment of the invention relates to the technical field of fire fighting and rescue equipment, in particular to a multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck.

Background

Along with the increase of high-rise buildings, the building height of the high-rise buildings is far greater than the lifting height of a fire rescue vehicle, for example, the maximum rescue height of the highest high-altitude rescue fire truck in the world is 112 meters at present, a crank arm structure is adopted, the length of a train is 18.9 meters, the width of the train is 2.5 meters, the height of the train is 4 meters, the maximum fire rescue radius is 6 meters, the turning radius is large, the situation that the vast majority of the large things enter a small-area building group needs enough road turning, the rescue vehicle cannot drive in the existing dense building group, and in addition, a vehicle-mounted crank arm overturning structure needs to use a hydraulic support leg to integrally stabilize the vehicle when in work, so that the hydraulic power is large; the crank arm turnover mechanism is positioned on an automobile, the gravity center is high, the stability is insufficient, the high-altitude fire-fighting or rescue effect is not ideal, namely, the rotary platform of the high-altitude rescue fire truck is arranged at the bottom of the main telescopic arm and is arranged on an automobile chassis, the working bucket is positioned at the top end of the main telescopic arm, the rescue position is searched through the rotation of the rotary platform at the bottom, but the existing high-altitude rescue vehicles are mostly in crank arm structures, after the working bucket extends to a large height, the rotary radius of the working bucket is small, the rescue distance is limited, particularly, the rescue vehicle with the crank arm turnover structure can be fully loaded only when the crank arm extends to more than 70 percent due to the limitation of the load of the crank arm, and a rescue blind area exists in the extension process of the crank arm, namely, one fire truck with the rescue height of 88 meters cannot realize rescue under 60 meters, therefore, once a high-rise building with 88 meters is in a dangerous situation, three fire trucks need to be driven simultaneously to meet the rescue of high-rise, middle-rise and bottom floors, so that the equipment investment and the rescue cost are greatly increased.

The other type is a telescopic cylinder structure, the number of the sections is limited, the telescopic arms in the two types are lifted through the stretching of a hydraulic oil cylinder, the lifting height of the telescopic arms is greatly influenced by the transmission form of the hydraulic oil cylinder, and the single transmission of the telescopic arm is only dependent on the stroke stretching of the hydraulic oil cylinder, so that the rescue height of the telescopic arms is difficult to meet the building height of the existing high-rise building.

In addition, the telescopic arms of the two structures are installed in an inclined telescopic manner, and the telescopic arms are installed on the rotary platform, so that the common defects exist, the larger the extending height of the telescopic arms is, the smaller the rescue radius is, the larger the rotary momentum of the rotary platform is, the higher the energy consumption is, the lower the stability is, and the slow rotary speed is.

Therefore, in the technical field of fire fighting and rescue equipment, the need of research and improvement still exists for the multi-stage hydraulic multiplication pulley vertical lifting type ascending platform fire fighting truck, which is also a research hotspot and focus in the technical field of fire fighting and rescue equipment at present and is a starting point of the completion of the invention.

Disclosure of Invention

Therefore, the embodiment of the invention provides a multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck, which aims to solve the technical problems that the existing high-altitude fire truck is small in maximum height rescue radius and large in limitation of the maximum rescue height by a hydraulic oil cylinder transmission mode.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to the embodiment of the invention, the multi-stage hydraulic multiplication pulley vertical lifting type climbing platform fire truck comprises an automobile, wherein a telescopic arm is hinged to the tail of an automobile chassis, a rotary platform is arranged at the top end of the telescopic arm, an operation arm is arranged on the rotary platform, and a working bucket is arranged at one end of the operation arm; the automobile chassis is provided with a turnover hydraulic oil cylinder, one end of the turnover hydraulic oil cylinder is hinged to the automobile chassis, the other end of the turnover hydraulic oil cylinder is hinged to the telescopic arm, front hydraulic support legs are mounted on the automobile chassis and close to the left and right of the cab position of an automobile, rear hydraulic support legs are mounted on the telescopic arm and far away from the left and right of the cab position of the automobile, an auxiliary support oil cylinder is arranged on the automobile chassis, the extending direction of a piston rod of the auxiliary support oil cylinder is vertical upward, and transition hydraulic oil cylinders are mounted on the left and right of the tail end position of the automobile chassis.

Further, the operation arm includes first fixed bolster, second fixed bolster is connected to first fixed bolster one end, and the other end is first uncovered, slidable mounting has the first sliding support by first power unit driven in the first fixed bolster, first sliding support stretches out the counter weight is installed to first uncovered one end, the second fixed bolster is kept away from the one end of first fixed bolster is equipped with the second uncovered, slidable mounting has the second sliding support by second power unit driven in the second fixed bolster, the second sliding support stretches out the uncovered one end of second is installed the work is fought.

Furthermore, the second fixing support is hinged to the first fixing support through a hinge shaft, and a positioning pin driven by a third power mechanism is arranged between the second fixing support and the first fixing support.

Furthermore, a supporting arm is fixedly mounted at one end, close to the second fixing support, of the first fixing support, a supporting rope wheel is rotatably mounted on the supporting arm, a hoisting mechanism is arranged at a position, close to the first opening, of the first fixing support, a hoisting arm is arranged on the second fixing support, hoisting steel wire ropes are arranged among the hoisting mechanism, the supporting rope wheel and the hoisting arm, and one end, far away from a hoisting point of the hoisting steel wire ropes, of the hoisting arm is hinged to the second fixing support.

Furthermore, a first limiting block used for limiting the vertical position of the hoisting arm is arranged on the second fixing support, and a second limiting block used for limiting the hoisting point of the hoisting arm to be lower than the outer plane of the second fixing support is arranged on the second fixing support.

Furthermore, the telescopic arm comprises a plurality of stages of telescopic cylinders which are sequentially sleeved together, each stage of telescopic cylinder comprises a plurality of telescopic joints which are sleeved together, each stage of telescopic cylinder is connected with a steel wire rope hydraulic lifting device, the steel wire rope hydraulic lifting device of the first stage of telescopic cylinder is arranged in the outermost telescopic joint, the steel wire rope hydraulic lifting device of the next stage of telescopic cylinder is arranged in the innermost telescopic joint of the previous stage of telescopic cylinder, the steel wire rope hydraulic lifting device comprises a lifting hydraulic oil cylinder, a cylinder body of the lifting hydraulic oil cylinder is fixedly arranged at the bottom of the corresponding telescopic joint, a fixed pulley block is arranged on the cylinder body of the lifting hydraulic cylinder, a movable pulley block is arranged on the piston rod of the lifting hydraulic cylinder, a lifting steel wire rope is arranged between the lifting hydraulic oil cylinder and the corresponding telescopic joint, one end of the lifting steel wire rope is fixed, and the other end of the lifting steel wire rope is fixed on the telescopic joint at the innermost layer of the telescopic cylinder after passing through a movable pulley block and a fixed pulley block; the outer-most telescopic joint of the rear-stage telescopic cylinder is sleeved in the inner-most telescopic joint of the front-stage telescopic cylinder, an oil pipe conveying device used for supplying oil to the rear-stage telescopic cylinder is installed in the inner-most telescopic joint of the front-stage telescopic cylinder, the working bucket is installed at the top of the inner-most telescopic joint of the last-stage telescopic cylinder, and the rear hydraulic support leg is installed on the outer surface of the outer-most telescopic joint of the first-stage telescopic cylinder.

Furthermore, the bottom of the outmost telescopic joint of the first-stage telescopic cylinder and the bottom of the innermost telescopic joint of the previous-stage telescopic cylinder are respectively provided with a rope distributing wheel for distributing the lifting steel wire rope of the corresponding fixed pulley block to the corresponding position.

Furthermore, the bottom of other telescopic joints except the outmost telescopic joint of the first-stage telescopic cylinder is provided with a wall-penetrating wheel, the bottom of the inner side of the outmost telescopic joint of the first-stage telescopic cylinder and the bottom of the innermost telescopic joint of the previous-stage telescopic cylinder are provided with bottom steering wheels, and the top of the inner side of other telescopic joints except the innermost telescopic joint of the last-stage telescopic cylinder is provided with top steering wheels.

Furthermore, the wall penetrating wheel penetrates through the corresponding telescopic joint, and the lifting steel wire rope is wound around the wall penetrating wheel by at least two turns from the outside of the corresponding telescopic joint and then enters the inner side of the telescopic joint.

Furthermore, the lifting steel wire rope of each stage of telescopic cylinder is wound through the corresponding movable pulley block and the fixed pulley block, then sequentially wound through the corresponding rope distributing wheel, the bottom steering wheel, the top steering wheel on the outermost layer and the wall penetrating wheel on the telescopic joint on the adjacent layer, and finally fixed at the position above the wall penetrating wheel on the telescopic joint on the innermost layer.

Furthermore, swing arms are arranged between two adjacent telescopic joints, one end of each swing arm is hinged to the outer telescopic joint, an inclined guide surface is arranged at the other end of each swing arm, a roller is arranged at one end, close to the inclined guide surface, of each swing arm, an adjusting screw is connected to a flange at the top end of the outer telescopic joint in a threaded mode, the end portion of each adjusting screw abuts against the inclined guide surface, and under the action of each adjusting screw, the outer edge of each roller abuts against the outer surface of the inner telescopic joint.

Further, the oil pipe conveying device comprises a mounting bracket, a core barrel driven by a fourth power mechanism is rotatably mounted on the mounting bracket, a baffle plate is arranged in the core barrel, the baffle plate divides the inner cavity of the core barrel into an oil inlet cavity and an oil return cavity, an oil inlet pipe communicated with the oil inlet cavity is fixedly arranged on the core barrel, an oil return pipe communicated with the oil return cavity is fixedly arranged on the core barrel, the oil inlet cavity is connected with an oil inlet pipeline through a rotary joint, the oil return cavity is connected with an oil return pipeline through another rotary joint, a belly pan is fixedly arranged on the outer surface of the core cylinder, the belly pan is fixedly provided with a double-groove wheel disc, the core cylinder, the belly pan and the double-groove wheel disc are coaxially arranged, an oil inlet rubber tube and an oil return rubber tube are respectively coiled in the double-groove wheel disc, one end of the oil inlet rubber tube is connected with the oil inlet tube, and one end of the oil return rubber tube is connected with the oil return tube.

Furthermore, a guide wheel is rotatably mounted on the mounting bracket, a floating wheel is arranged below the guide wheel, and the oil inlet rubber tube and the oil return rubber tube are wound around the guide wheel and the floating wheel and then are connected with a lifting hydraulic oil cylinder of a rear-stage telescopic cylinder.

Furthermore, a first sensor and a second sensor are arranged on the mounting bracket, the first sensor is positioned below the guide wheel and above the floating wheel, the second sensor is positioned below the floating wheel, and the first sensor and the second sensor are both connected with the fourth power mechanism.

Furthermore, an extension spring is arranged between the floating wheel and the mounting bracket, one end of the extension spring is fixed on the floating wheel, and the other end of the extension spring is fixed on the mounting bracket.

Furthermore, the fourth power mechanism comprises a motor installed on the fixed support, an outer gear ring is fixedly installed on the abdominal plate, a transmission shaft is rotatably installed on the installation support, a driving gear meshed with the outer gear ring is installed at one end of the transmission shaft, and the other end of the transmission shaft is in transmission connection with the motor.

The embodiment of the invention has the following advantages:

(1) the rotary platform is arranged at the top end of the telescopic arm, the working bucket is arranged on the second sliding support, the angle position and the extension length of the working bucket can be adjusted according to a rescue target, the rotary radius of the working bucket is large, the rescue radius is increased, and the application range of the invention is expanded; articulate flexible arm on vehicle chassis's tail end, the during operation, through upset hydraulic cylinder with flexible arm upset to vertical state, the bottom of flexible arm is close to ground position, compares with the structure that traditional bent arm is located vehicle chassis top, has reduced the focus of flexible arm, has increased the stability of flexible arm, flexible arm vertical lift for flexible height is rescue height promptly.

(2) Due to the fact that the transition hydraulic oil cylinder is arranged, the technical problem that the telescopic boom is unstable in the overturning process is solved, and the use stability of the telescopic boom overturning device is improved.

(3) Because the second fixed bolster passes through the articulated installation of articulated shaft on first fixed bolster for the upset can be realized around the articulated shaft to the second fixed bolster, thereby realizes folding transportation, has reduced the space and has occupy.

(4) According to the telescopic arm, the plurality of telescopic joints are lifted by one lifting hydraulic oil cylinder, so that the use number of the lifting hydraulic oil cylinder is reduced, the production cost is reduced, more importantly, the installation space is saved, more telescopic joints can be arranged, the telescopic length is increased, the technical problem that the height of the telescopic arm of the existing telescopic cylinder structure is further improved due to the restriction of the transmission form of the hydraulic oil cylinder is solved, the sectional area of each telescopic joint can be as large as possible, and the stability of the telescopic joints in the telescopic process is improved.

(5) Because the bottom of the telescopic joint is provided with the wall penetrating wheel, the lifting steel wire rope is wound by the wall penetrating wheel from the outer side of the corresponding telescopic joint for at least two turns and then enters the inner side of the telescopic joint, the groove width of the wall penetrating wheel is only the diameter of three turns of lifting steel wire ropes, the wheel width direction is consistent with the thickness direction of a steel plate of the telescopic joint, the inner space of the telescopic joint is saved to the maximum extent, the utilization rate of the effective sectional area of the telescopic joint is improved, the lifting steel wire rope forms bottom force application when lifting the telescopic joint, the stress of each section of lifting telescopic joint is balanced, and the lifting of the telescopic joint is more stable.

(6) According to the invention, a vertical lifting telescopic arm structure is adopted, and the working bucket is arranged on the second sliding support, so that the embodiment of the invention can meet the requirement that the long-distance rescue radius can be realized in the whole telescopic process of the telescopic arm, and the rescue blind area is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a state of a tilting process of the telescopic boom according to the embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a state of turning over the telescopic boom according to the embodiment of the present invention;

FIG. 4 is a schematic view of a connecting structure of a counterweight and a working bucket according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view A-A of FIG. 4;

FIG. 6 is a schematic view of the construction of the telescopic arm in the embodiment of the present invention;

fig. 7 is a schematic view of a hoisting cable winding structure of the primary telescopic cylinder according to an embodiment of the present invention;

FIG. 8 is a schematic view of the outermost expansion joint of FIG. 7;

FIG. 9 is a schematic cross-sectional view of B-B in FIG. 8;

FIG. 10 is a schematic cross-sectional view of C-C of FIG. 8;

FIG. 11 is a schematic diagram of the winding relationship of the hoist ropes of two adjacent telescopic sections according to the embodiment of the present invention;

FIG. 12 is a schematic view of a connection structure of two adjacent telescopic joints according to an embodiment of the present invention;

FIG. 13 is a schematic view of D-D of FIG. 12;

FIG. 14 is an enlarged schematic view of E in FIG. 12;

FIG. 15 is a schematic structural view of a tubing transfer assembly according to an embodiment of the present invention;

FIG. 16 is a schematic view of the structure of F-F in FIG. 15;

FIG. 17 is a hydraulic schematic of a hydraulic leg in an embodiment of the invention;

FIG. 18 is a schematic structural view of a hydraulic leg according to an embodiment of the invention;

in the figure: 1. the device comprises an automobile chassis, 2, a telescopic arm, 201, a first-stage telescopic cylinder, 202, a second-stage telescopic cylinder, 203, a last-stage telescopic cylinder, 204, a steel wire rope hydraulic lifting device, 20401, an outermost telescopic joint, 20402, a second outer telescopic joint, 20403, an innermost telescopic joint, 20404, a lifting steel wire rope, 20405, a rope dividing wheel, 20406, a bottom steering wheel, 20407, a top steering wheel, 20408, a wall penetrating wheel, 20409, a lifting hydraulic oil cylinder, 20410, a movable pulley block, 20411, a fixed pulley block, 20412, a flange, 20413, a swinging arm, 20414, an inclined guide surface, 20415, an adjusting screw, 20416, a locking nut, 20417, an inner limiting block, 20418, a roller, 20419, an outer limiting block, 205, an oil pipe conveying device, 20501, a mounting bracket, 20502, a double-groove wheel disc, 20503, a guide wheel, 20504, a floating wheel, 05, a first sensor, 20506, a second sensor, a tension spring, 20508, a core cylinder, a 205081 and a core cylinder, An oil inlet cavity, 205082, an oil return cavity, 20509, a partition plate, 20510, an oil inlet pipe, 20511, an oil return pipe, 20512, a belly pan, 20513, an oil inlet rubber pipe, 20514, an oil return rubber pipe, 20515, a motor, 20516, a transmission shaft, 20517, an outer gear ring, 20518, a driving gear, 3, a working bucket, 4, a front hydraulic leg, 5, a turnover hydraulic cylinder, 6, a rear hydraulic leg, 7, a transition hydraulic cylinder, 8, a rotary platform, 9, a first fixing bracket, 10, a first sliding bracket, 11, a counterweight, 12, a first motor, 13, a first driving sprocket, 14, a first driven sprocket, 15, a first chain, 16, a second motor, 17, a second driving sprocket, 18, a second driven sprocket, 19, a second chain, 20, a second fixing bracket, 21, a second sliding bracket, 22, a hinge shaft, 23, a positioning pin, 24, a supporting arm, 25, a supporting rope sheave, 26 and a hoisting mechanism, 27. hoisting arms, 28, hoisting steel wire ropes, 29, a first limiting block, 30, a second limiting block, 31, a second connecting plate, 32, a horizontal oil cylinder, 3201, a first cylinder body, 3202, a second cylinder body, 3203, a third cylinder body, 3204, a plunger, 3205, a first central cylinder, 3206, a second central cylinder, 3207, a third central cylinder, 3208, an oil through port, 3209, a horizontal first working oil port, 3210, a horizontal second working oil port, 33, a vertical oil cylinder, 3301, a first sleeve, 3302, a second sleeve, 3303, a third sleeve, 3304, a fourth sleeve, 3305, a fifth sleeve, 3306, a sixth sleeve, 34, an oil inlet pipeline, 35, an oil return pipeline, 36, a first reversing valve, 37, a second reversing valve, 38, a first hydraulic one-way valve, 39, a second hydraulic one-way valve, 40, an inclination angle sensor, 41 and an auxiliary supporting oil cylinder.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present specification, the terms "front", "rear", "left", "right", "middle", "upper", "lower", and the like are used for descriptive purposes only and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the structures may be changed or adjusted without substantial technical change.

As shown in fig. 1, 3 and 4 together, an embodiment of the invention provides a multistage hydraulic multiplication pulley vertical lifting type climbing platform fire truck, which comprises a vehicle chassis 1, wherein a telescopic arm 2 is hinged at the tail part of the vehicle chassis 1, the length of a hinged point of the telescopic arm 2 and the vehicle chassis 1, which is far away from the bottom of the telescopic arm 2, is less than or equal to the height of the vehicle chassis 1 so as to ensure that the telescopic arm 2 can be turned to a vertical position, a rotary platform 8 is arranged at the top end of the telescopic arm 2, a working arm is arranged on the rotary platform 8, a working bucket 3 is arranged at one end of the working arm, the working arm comprises a first fixed support 9, one end of the first fixed support 9 is connected with a second fixed support 20, the other end of the first fixed support is a first opening, a first sliding support 10 driven by a first power mechanism is slidably arranged in the first fixed support 9, a counterweight 11 is arranged at one end of the first sliding support 10, which extends out of the first opening, a second opening is formed in one end, far away from the first fixed support 9, of the second fixed support 20, a second sliding support 21 driven by a second power mechanism is installed in the second fixed support 20 in a sliding mode, a working bucket 3 is installed at one end, extending out of the second opening, of the second sliding support 21, the first fixed support 9 and the second fixed support 20 are both square tubular structures and are generally formed by welding steel beams, similarly, the first sliding support 10 and the second sliding support 21 are also formed by welding square tubular structures, and the cross section shapes of the first sliding support 10 and the second sliding support 21 are matched with the inner cross section shapes of the corresponding first fixed support 9 and the corresponding second fixed support 20; install upset hydraulic cylinder 5 on vehicle chassis 1, the articulated installation on vehicle chassis 1 of the one end of upset hydraulic cylinder 5, the other end is articulated to be installed on flexible arm 2, during vertical state, the hinge point of upset hydraulic cylinder 5 and flexible arm 2 is higher than the pin joint of flexible arm 2 and vehicle chassis 1, has not only reduced the focus height, has improved the steadiness, has realized the vertical lift of flexible arm 2 moreover, and the biggest flexible length is for the biggest rescue height promptly. Front hydraulic support legs 4 are respectively installed on the left and right sides of a cab position close to an automobile on an automobile chassis 1, rear hydraulic support legs 6 are respectively installed on the left and right sides of the cab position far away from the automobile on a telescopic arm 2, an auxiliary support oil cylinder 41 is arranged on the automobile chassis 1, the extending direction of a piston rod of the auxiliary support oil cylinder 41 is vertical upwards, the telescopic arm 2 is used for lifting and bearing the telescopic arm, the auxiliary support oil cylinder 41 firstly lifts the telescopic arm 2 by a certain height, the telescopic arm 2 is continuously turned to a vertical state by a turning hydraulic oil cylinder 5, the installation inclination angle of the turning hydraulic oil cylinder 5 is reduced, and the height space above the automobile chassis 1 is saved.

When the telescopic arm 2 is horizontally arranged on the automobile chassis 1, the installation included angle between the axis of the overturning hydraulic oil cylinder 5 and the automobile chassis 1 is smaller than 5 degrees, the piston rod of the auxiliary support oil cylinder 41 is abutted against the telescopic arm 2, the structure greatly reduces the height space of the overturning hydraulic oil cylinder 5 above the automobile chassis 1, the limited height space above the automobile chassis 1 is used to the sectional area of the telescopic arm 2 as far as possible, and the effective rescue height of the telescopic arm 2 is increased as far as possible.

As shown in fig. 2, in the overturning process of the overturning hydraulic cylinder 5, the rear hydraulic leg 6 mounted on the telescopic arm 2 is not supported on the ground, and the automobile is difficult to keep balance and stability only by relying on the left and right front hydraulic legs 4, so that through intensive research, the inventor of the application adopts the following technical scheme that the left and right ends of the automobile chassis 1 are respectively provided with the transition hydraulic cylinder 7.

As shown in fig. 4, the first power mechanism includes a first driving sprocket 13 rotatably mounted on the first fixing bracket 9 and driven by a first motor 12, the first driving sprocket 13 is located at one end close to the second fixing bracket 20, a first driven sprocket 14 rotatably mounted at the other end of the first fixing bracket 9, the first driven sprocket 14 is close to the first open position, a first chain 15 is wound around between the first driving sprocket 13 and the first driven sprocket 14, a first connecting plate is fixedly mounted on the first chain 15, one end of the first connecting plate is fixed on the first chain 15, and the other end of the first connecting plate is fixed on the first sliding bracket 10, and the first sliding bracket 10 is driven to slide back and forth by the forward and reverse rotation of the first motor 12, so as to achieve the movement of the counterweight 11 and achieve the purpose of balancing the working bucket 3. Of course, a pulley and slide rail assembly may be disposed between the first fixing bracket 9 and the first sliding bracket 10 to satisfy the effect of smoother sliding.

As shown in fig. 4 and 5, the second power mechanism includes a second driving sprocket 17 rotatably mounted on the second fixing bracket 20 and driven by the second motor 16, the second driving sprocket 17 is located at one end close to the first fixing bracket 9, a second driven sprocket 18 rotatably mounted at the other end of the second fixing bracket 20, the second driven sprocket 18 is close to the second open position, a second chain 19 is looped between the second driving sprocket 17 and the second driven sprocket 18, a second connecting plate 31 is fixedly mounted on the second chain 19, one end of the second connecting plate 31 is fixed on the second chain 19, and the other end is fixed on the second sliding bracket 21, and the second driving sprocket 17 is driven to slide back and forth by the forward and reverse rotation of the second motor 16, so as to move the working bucket 3 and achieve the goal of approaching the rescue goal. Of course, a pulley and slide rail assembly may be disposed between the second fixing bracket 20 and the second sliding bracket 21 to satisfy the effect of smoother sliding.

Second fixed bolster 20 passes through articulated shaft 22 and articulates installation on first fixed bolster 9 for second fixed bolster 20 can realize the upset around articulated shaft 22, thereby realize folding transportation, reduced the space and taken up, be equipped with between second fixed bolster 20 and the first fixed bolster 9 by third power unit driven locating pin 23, in normal work, locating pin 23 links together first fixed bolster 9 and second fixed bolster 20, third power unit is cylinder, pneumatic cylinder or electric putter usually.

A supporting arm 24 is fixedly arranged at one end of the first fixed bracket 9 close to the second fixed bracket 20, a supporting rope wheel 25 is rotatably arranged on the supporting arm 24, the supporting rope wheel 25 protrudes out of the outer plane of the second fixed bracket 20, a hoisting mechanism 26 is arranged at the position of the first fixed bracket 9 close to the first opening, a hoisting arm 27 is arranged on the second fixed bracket 20, a hoisting point of the hoisting arm 27 protrudes out of the outer plane of the second fixed bracket 20 and is lower than the supporting rope wheel 25 in height, a hoisting steel wire rope 28 is arranged among the hoisting mechanism 26, the supporting rope wheel 25 and the hoisting arm 27, one end of the hoisting steel wire rope 28 is fixed on the hoisting mechanism 26, the other end is fixed on the hoisting point of the hoisting arm 27 after tightly winding the supporting rope wheel 25, under the action of hoisting power, the second fixed bracket 20 is gradually pulled to the first fixed bracket 9 around the hinge shaft 22, when the second fixed bracket 20 is combined with the first fixed bracket 9, the third power mechanism pushes the positioning pin 23 to connect the first fixing bracket 9 and the second fixing bracket 20 together. The winding mechanism 26 is well known to those skilled in the art and can be purchased for use as needed and will not be described further herein.

One end of the hoisting arm 27, which is far away from the hoisting point of the hoisting steel wire rope 28, is hinged to the second fixing support 20, and during transportation, the hoisting arm 27 can be turned over below the outer plane of the second fixing support 20 to avoid being overhigh. The second fixed support 20 is provided with a first limiting block 29 for limiting the vertical position of the hoisting arm 27, during hoisting, the first limiting block 29 plays a role in blocking, the second fixed support 20 is provided with a second limiting block 30 for limiting the hoisting point of the hoisting arm 27 to be lower than the outer plane of the second fixed support 20, and during transportation, the second limiting block 30 plays a role in blocking.

During transportation, as shown in fig. 1, telescopic boom 2 is horizontally placed on automobile chassis 1, first sliding support 10 retracts into first fixed support 9, rotary platform 8 and first fixed support 9 are installed at the top position of telescopic boom 2, locating pin 23 is opened, second fixed support 20 is turned over to the side surface position of telescopic boom 2, and is just located the automobile top plane, hoisting arm 27 is turned over to second limiting block 30 position, and is hidden below the outer plane of second fixed support 20, the whole structure is compact, and the occupied space is small.

As shown in fig. 6, the telescopic arm 2 includes a plurality of telescopic cylinders which are sequentially sleeved together, each telescopic cylinder includes a plurality of telescopic joints which are sleeved together, each telescopic cylinder is connected with a steel wire rope hydraulic lifting device 204, the steel wire rope hydraulic lifting device 204 of the first telescopic cylinder 201 is arranged in the outermost telescopic joint 20401, the steel wire rope hydraulic lifting device 204 of the next telescopic cylinder is arranged in the innermost telescopic joint 20403 of the previous telescopic cylinder, as shown in fig. 7, 8, 9 and 10, the steel wire rope hydraulic lifting device 204 includes a lifting hydraulic cylinder 20409, a cylinder body of the lifting hydraulic cylinder 20409 is fixedly arranged at the bottom of the inner space of the corresponding telescopic joint, a fixed pulley block 20411 is arranged on the cylinder body of the lifting hydraulic cylinder 20409, a movable pulley block 20410 is arranged on a piston rod of the lifting hydraulic cylinder 20409, a lifting steel wire rope 20404 is arranged between the lifting hydraulic cylinder 20409 and the corresponding telescopic joint, one end of the hoisting steel wire 20404 is fixed, the fixed end is usually a fixed position of a cylinder body of the hoisting hydraulic cylinder 20409 or an outermost telescopic joint 20401, and the other end is fixed on an innermost telescopic joint 20403 of the telescopic cylinder after passing through a movable pulley block 20410 and a fixed pulley block 20411. The number of movable pulleys in the movable pulley block 20410 and the number of fixed pulleys in the fixed pulley block 20411 are set by those skilled in the art according to the number of telescopic joints, so that the stroke of the lifting hydraulic cylinder 20409 fixed in the outermost telescopic joint 20401 satisfies the expansion of all telescopic joints, that is, the lifting hydraulic cylinder 20409 with one telescopic joint length can satisfy the expansion of all telescopic joints, for example, six telescopic joints are provided, three movable pulleys are provided in the movable pulley block 20410, three fixed pulleys are provided in the fixed pulley block 20411, one end of the lifting steel wire rope 20404 is fixed at a fixed position of the cylinder body of the lifting hydraulic cylinder 20409, the other end of the lifting steel wire rope sequentially and respectively passes through the movable pulleys and the fixed pulleys, and then is fixed on the innermost telescopic joint 20403, and the transmission ratio of the three-stage movable pulley structure is 1: 6, promote 1 meter of piston rod pole flexible of hydraulic cylinder 20409 promptly, the telescopic joint removes 6 meters, the pneumatic cylinder of 8 meters stroke just can satisfy the telescopic joint of 48 meters flexible length, three-level telescopic cylinder of series connection, the flexible length of 2 flexible lengths of each grade telescopic boom 48 meters, just can reach 144 meters rescue height, if increase drive ratio, or the length of extension telescopic joint, or increase the stroke that promotes hydraulic cylinder 20409, all can reach the purpose of increase rescue height, far exceed current 112 meters current highest rescue height, thereby the lift height of having solved telescopic cylinder structure telescopic boom 2 receives the big technical problem of promotion hydraulic cylinder 20409 transmission form restriction. The outermost telescopic joint 20401 of the next-stage telescopic cylinder is sleeved in the innermost telescopic joint 20403 of the previous-stage telescopic cylinder, and an oil pipe conveying device 205 for supplying oil to the next-stage telescopic cylinder is installed in the innermost telescopic joint 20403 of the previous-stage telescopic cylinder.

Rope distributing wheels 20405 for distributing the lifting steel wire ropes 20404 of the corresponding fixed pulley group 20411 to corresponding positions are mounted at the bottoms of the outermost telescopic joint 20401 of the first-stage telescopic cylinder 201 and the innermost telescopic joint 20403 of the previous-stage telescopic cylinder, taking the telescopic arm 2 with a square cross section as an example, lifting points are generally required to be mounted in four directions, then the rope distributing wheels 20405 need a four-groove structure, four lifting steel wire ropes 20404 need to be distributed to four different side walls respectively, and the synchronism and balance in the lifting process of each telescopic joint are guaranteed.

Except for the outermost expansion joint 20401 of the first-stage expansion cylinder 201, the bottoms of other expansion joints are all provided with a wall-penetrating wheel 20408, as shown in fig. 11, the wall-penetrating wheel 20408 is rotatably arranged on the corresponding expansion joint through a bearing seat, a through hole is formed in the expansion joint corresponding to the position of the wall-penetrating wheel 20408 so as to meet the requirement that the wall-penetrating wheel 20408 passes through, the bottom steering wheel 20406 is arranged at the bottom of the inner side of the outermost expansion joint 20401 of the first-stage expansion cylinder 201 and the innermost expansion joint 20403 of the previous-stage expansion cylinder, the top steering wheels 20407 are arranged at the tops of the inner sides of other expansion joints except for the innermost expansion joint 20403 of the last-stage expansion cylinder 203, the wall-penetrating wheel 20408 passes through the corresponding expansion joint, the groove width of the wall-penetrating wheel 20408 is only about the diameter of three turns of lifting steel wire ropes 20404, the wheel width direction is consistent with the expansion joint steel plate thickness direction, the inner space of the expansion joint is saved to the maximum extent, and the utilization ratio of the effective sectional area of the expansion joint is improved, the lifting steel wire rope 20404 is wound around the wall penetrating wheel 20408 from the outer side of the corresponding telescopic joint for at least two turns and then enters the inner side of the telescopic joint, the number of winding turns is set according to the thickness of the wall plate of the telescopic joint and the thickness of the lifting steel wire rope 20404, generally, the diameter of the lifting steel wire rope 20404 is larger than the thickness of the wall plate of the telescopic joint, and therefore the lifting steel wire rope 20404 wound for two turns can reach the inner side of the telescopic joint from the outer side of the telescopic joint, the lifting steel wire rope 20404 is wound in this way, bottom force application is formed when the lifting steel wire rope 20404 hoists the telescopic joint, the stress of each section of lifting telescopic joint is balanced, and the lifting of the telescopic joint is more stable.

The hoisting steel wire rope 20404 of each stage of telescopic cylinder is wound through the corresponding movable pulley block 20410 and fixed pulley block 20411, then sequentially wound through the corresponding rope distributing wheel 20405, bottom steering wheel 20406, top steering wheel 20407 on the outermost layer and wall penetrating wheel 20408 of the telescopic joint on the adjacent layer, and finally fixed above the wall penetrating wheel 20408 of the telescopic joint 20403 on the innermost layer. Specifically, the outermost telescopic joint 20401 of the first-stage telescopic cylinder 201 is fixed, the lifting steel wire rope 20404 winds around the rope distributing wheel 20405, then winds through the bottom steering wheel 20406, winds up to the top steering wheel 20407 of the outermost telescopic joint 20401, then winds down to the wall penetrating wheel 20408 of the secondary outer telescopic joint 20402, is located on the outer side of the secondary outer telescopic joint 20402, winds two turns of the lifting steel wire rope 20404 on the wall penetrating wheel 20408, penetrates through a through hole in the secondary outer telescopic joint 20402, enters the inner side of the secondary outer telescopic joint 20402, winds up to the top steering wheel 07 of the secondary outer telescopic joint 20402, winds to the wall penetrating wheel 20408 of the inner layer, winds to the wall penetrating wheel 20408 of the innermost telescopic joint 20403 in sequence, winds to the inner side of the innermost telescopic joint 20403, and is fixed at the position above the wall penetrating wheel 20408 of the innermost telescopic joint 20403 at the end. A steel wire rope hydraulic lifting device 204 used for lifting the second-stage telescopic cylinder 202 is arranged in the innermost telescopic joint 20403 of the first-stage telescopic cylinder 201, a lifting steel wire rope 20404 at the position winds around a rope distributing wheel 20405 and then winds through a bottom steering wheel 20406 and then winds up to a top steering wheel 20407 of the innermost telescopic joint 20403 of the first-stage telescopic cylinder 201 and then winds down to a wall penetrating wheel 20408 of the outermost telescopic joint 20401 of the second-stage telescopic cylinder 202, the lifting steel wire rope 20404 is located on the outer side of the outermost telescopic joint 20401 of the second-stage telescopic cylinder 202 at the moment, the lifting steel wire rope 20404 winds two turns on the wall penetrating wheel 20408, penetrates through a through hole in the outermost telescopic joint 20401 of the second-stage telescopic cylinder 202 and enters the inner side of the outermost telescopic joint 20401 of the second-stage telescopic cylinder 202 and then winds up to the top steering wheel 20407 of the outermost telescopic joint 20401 of the second-stage telescopic cylinder 202, and winds up to the wall penetrating wheel 20408 of the inner telescopic joint of the second-stage telescopic cylinder 202, sequentially wound to the wall penetrating wheel 20408 of the innermost telescopic joint 20403, and then wound to the inner side of the second-stage innermost telescopic joint 20403, and the end part of the second-stage innermost telescopic joint is fixed above the wall penetrating wheel 20408 of the innermost telescopic joint 20403. By analogy, the hydraulic lifting of the steel wire ropes of all stages of telescopic cylinders is realized.

As shown in fig. 12, 13 and 14, a flange 20412 is provided at the top end of each telescopic joint, the inner telescopic joint passes through the flange 20412 at the top end of the outer telescopic joint, a sliding gap is provided between a flange hole at the top end of the outer telescopic joint and the outer surface of the inner telescopic joint, a swing arm 20413 is provided between two adjacent telescopic joints, one end of the swing arm 20413 is hinged to the outer telescopic joint, an inclined guide surface 20414 is provided at the other end of the swing arm 20413, an included angle between the inclined guide surface 20414 and the symmetric central plane of the swing arm 20413 is an acute angle, a roller 20418 is provided at one end of the swing arm 13 close to the inclined guide surface 20414, the rotation center of the swing arm 20413 is parallel to the rotation center of the roller 20418, an adjusting screw 20415 is threadedly connected to the flange 20412 at the top end of the outer telescopic joint, the end of the adjusting screw 20415 abuts against the inclined guide surface 20414, under the action of the adjusting screw 20415, the outer edge of the roller 20418 abuts against the outer surface of the inner telescopic joint, so as to reduce the shaking gap between two adjacent telescopic joints and ensure that the inner layer telescopic joint is more stable in the telescopic process.

The cross section of the telescopic joint is square, each telescopic joint is of a square tubular structure surrounded by four square plates, the telescopic joint with the square cross section avoids rotation in the telescopic process, and the stability of the telescopic joint is improved.

Each panel of the inner telescopic joint is at least abutted against two groups of rollers 20418 which are arranged at intervals, and the rollers 20418 are respectively positioned at the corner positions of the corresponding telescopic joints. If the panel breadth is bigger, more sets of rollers 20418 can be arranged, and corresponding rollers 20418 can be arranged at the corner position and the middle position of the telescopic joint so as to ensure that the telescopic process of the inner-layer telescopic joint is more stable.

A locking nut 20416 is arranged between the adjusting screw 20415 and the flange 20412, and when the outer edge of the roller 20418 abuts against the outer surface of the inner-layer telescopic joint, the locking nut 20416 is screwed, so that the end surface of the locking nut 20416 abuts against the end surface of the flange 20412, and the phenomenon that the adjusting screw 20415 is loosened in the telescopic process of the telescopic joint to cause an overlarge shaking gap of the inner-layer telescopic joint is avoided.

Be equipped with interior stopper 20417 on the surface of inlayer telescopic joint bottom, the clearance between interior stopper 20417 and the outer telescopic joint internal surface will be adjusted to being less than the sliding gap, and is corresponding, is equipped with outer stopper 20419 on the internal surface at outer telescopic joint top, and similarly, the clearance between interior stopper 20417 and the outer telescopic joint internal surface will be adjusted to being less than the sliding gap for the flexible in-process of inlayer telescopic joint is more firm. Each panel of the inner-layer telescopic joint is at least provided with a group of inner limiting blocks 20417 and outer limiting blocks 20419, and a person skilled in the art can select the number of the inner limiting blocks 20417 and the outer limiting blocks 20419 used on each panel and arrange the installation positions of the inner limiting blocks 20417 and the outer limiting blocks 20419 according to the size of the panel of the telescopic joint, which is not described herein again. The upper surfaces of all the inner limiting blocks 20417 are located on the same horizontal plane, and the lower surfaces of all the outer limiting blocks 20419 are located on the same horizontal plane, so that the coaxiality of the inner-layer expansion joint and the outer-layer expansion joint is consistent after the inner limiting block 20417 is contacted with the outer limiting block 20419, the verticality of the expansion joint in normal work is ensured, and the use performance of the telescopic joint is further enhanced.

In the embodiment of the invention, the swing arm 20413 is arranged at the position close to the flange 20412 and against the outer telescopic joint, the roller 20418 is arranged on the swing arm 20413, by the adjusting screw 20415 abutting against the swing arm 20413, the outer edge of the roller 20418 abuts against the outer surface of the inner telescopic joint, thereby reducing the sliding clearance between the adjacent telescopic joints, and the inner limit block 20417 is arranged at the bottom of the inner layer telescopic joint, so that the inner layer telescopic joint is more stable in the telescopic process, meanwhile, the outer limiting block 20419 has a limiting function and effectively prevents the inner telescopic joint from falling off, and when the inner telescopic joint extends to the maximum length, that is, the inner limit block 20417 abuts against the outer limit block 20419, so as to ensure the axes of the inner layer expansion joint and the outer layer expansion joint to be consistent, therefore, this structure can use vertical lift, and the stability can be high, has realized that flexible arm 2 is the biggest rescue height and has equaled its self flexible length.

As shown in fig. 15 and 16, the oil pipe conveying device 205 includes a mounting bracket 20501, a core barrel 20508 driven by a fourth power mechanism is rotatably mounted on the mounting bracket 20501 through a bearing seat, a partition plate 20509 is disposed in the core barrel 20508, the partition plate 20509 partitions an inner cavity of the core barrel 20508 into an oil inlet cavity 205081 and an oil return cavity 205082, the oil inlet cavity 205081 is not communicated with the oil return cavity 205082, an oil inlet tube 20510 communicated with the oil inlet cavity 205081 is fixedly mounted on the core barrel 20508, an oil return tube 20511 communicated with the oil return cavity 205082 is fixedly mounted on the core barrel 20508, the oil inlet tube 20510 and the oil return tube 20511 extend out of an outer surface of the core barrel 20508, the oil inlet cavity 205081 is connected with an oil inlet pipe 34 through a rotary joint, the oil return cavity 205082 is connected with an oil return pipe 35 through another rotary joint, a belly pan 20512 is fixedly mounted on an outer surface of the core barrel 20508, a double-groove wheel disk 20502 is fixedly mounted on the belly pan 20512, the core barrel 20508, the belly pan 12 and a double-groove wheel disk 20502 are coaxially disposed, a double-groove rubber tube 5813 and 20524 are respectively wound in the double-groove wheel disk 20502, the oil inlet rubber tube 20513 and the oil return rubber tube 20514 both adopt high-pressure hoses, one end of the oil inlet rubber tube 20513 is connected with the oil inlet tube 20510, and one end of the oil return rubber tube 20514 is connected with the oil return tube 20511. In order to save installation space, the web disc 20512 is designed to be a hollow cavity structure, the oil inlet pipe 20510 and the oil return pipe 20511 both penetrate through the hollow cavity of the web disc 20512, and the ends of the oil inlet rubber pipe 20513 and the oil return rubber pipe 20514 which are wound on the innermost ring of the double-groove wheel disc 20502 penetrate through the hollow cavity of the web disc 20512 and are respectively connected with the oil inlet pipe 20510 and the oil return pipe 20511.

A guide wheel 20503 is rotatably mounted on the mounting bracket 20501, the guide wheel 20503 is also provided with double grooves corresponding to a double-groove wheel disc 20502 generally, an oil inlet rubber tube 20513 and an oil return rubber tube 20514 are led out respectively, a floating wheel 20504 is arranged below the guide wheel 20503, similarly, a floating wheel 20504 is also provided with double grooves, the oil inlet rubber tube 20513 and the oil return rubber tube 20514 are connected with a lifting hydraulic oil cylinder 20409 of a rear-stage telescopic cylinder after passing through the guide wheel 20503 and the floating wheel 20504 in a winding manner, the floating wheel 20504 falls on the oil inlet rubber tube 20513 and the oil outlet rubber tube by gravity, the oil inlet rubber tube 20513 and the oil outlet rubber tube are tensioned, stable release or coiling of the oil inlet rubber tube 20513 and the oil return rubber tube 20514 is realized, and lifting of the telescopic arm 2 cannot be influenced by non-constant linear speeds of the oil inlet rubber tube 20513 and the oil return rubber tube 20514 on the double-groove wheel disc 20502.

A first sensor 20505 and a second sensor 20506 are arranged on the mounting bracket 20501, the first sensor 20505 is positioned below the guide wheel 20503 and above the floating wheel 20504, the second sensor 20506 is positioned below the floating wheel 20504, and the first sensor 20505 and the second sensor 20506 are both connected with a fourth power mechanism. The first sensor 20505 is used for detecting the upper limit position of the floating wheel 20504, the second sensor 20506 is used for detecting the lower limit position of the floating wheel 20504, when the first sensor 20505 detects the floating wheel 20504, the fourth power mechanism is started to drive the double-groove wheel disc 20502 to rotate, the wound oil inlet rubber pipe 20513 and the wound oil return rubber pipe 20514 are released, and when the second sensor 20506 detects the floating wheel 20504, the fourth power mechanism is stopped.

An extension spring 20507 is arranged between the floating wheel 20504 and the mounting bracket 20501, one end of the extension spring 20507 is fixed on the floating wheel 20504, the other end of the extension spring 20507 is fixed on the mounting bracket 20501, and a pretightening force is applied to the oil feeding rubber hose 20513 and the oil returning rubber hose 20514, so that the floating wheel 20504 is prevented from moving upwards too fast and moving too far to fall out of the detection range of the first sensor 20505.

The fourth power mechanism comprises a motor 20515 mounted on a fixed support, an outer gear ring 20517 is fixedly mounted on a web disc 20512, a transmission shaft 20516 is rotatably mounted on a mounting support 20501, a driving gear 20518 meshed with the outer gear ring 20517 is mounted at one end of a transmission shaft 20516, the other end of the transmission shaft is in transmission connection with the motor 20515, the web disc 20512 is driven to rotate through the rotation of the transmission shaft 20516, so that a core barrel 20508 and a double-groove wheel disc 20502 are driven to rotate together to release and coil an oil inlet rubber hose 20513 and an oil return rubber hose 20514, the motor 20515 is in transmission connection with a transmission shaft 20516 through chain transmission, of course, belt transmission or gear transmission can be adopted, and the fourth power mechanism can be set by a person skilled in the art according to the space requirement, and is not described herein.

Of course, in order to simplify the structure, the oil pipe delivery device 205 may also use another technical solution, specifically, the oil pipe delivery device 205 includes a wheel disc driven by a torque motor or a servo motor, and then the oil pipe is wound on the wheel disc and is delivered step by step.

As shown in fig. 17, all the hydraulic legs include a vertical oil cylinder 33 and a horizontal oil cylinder 32, the axes of which are vertically arranged, the body of the vertical oil cylinder 33 is mounted on the piston rod of the horizontal oil cylinder 32, the rodless cavity of the horizontal oil cylinder 32 is communicated with the oil port a of the first directional valve 36, the rod cavity of the horizontal oil cylinder 32 is communicated with the oil port B of the first directional valve 36, the oil port P of the first directional valve 36 is communicated with the oil inlet pipeline 34, the oil port T of the first directional valve 36 is communicated with the oil return pipeline 35, the rodless cavity of the vertical oil cylinder 33 is connected with the oil port a of the second directional valve 37 through the first pilot operated check valve 38, the rod cavity of the vertical oil cylinder 33 is connected with the oil port B of the second directional valve 37 through the second pilot operated check valve 39, the pilot operated pipeline of the second pilot operated check valve 39 is communicated with the oil port a of the second directional valve 37, the pipeline of the first pilot operated check valve 38 is communicated with the oil port B of the second directional valve 37, and the first pilot operated check valve 38 and the second pilot operated check valve 39 can maintain the current pressure of the vertical oil cylinder 33, the hydraulic oil leakage caused by bearing change is avoided, the output quantity of a piston rod of a vertical oil cylinder 33 is stabilized, a second reversing valve 37 is connected with an inclination angle sensor 40, a P oil port of the second reversing valve 37 is communicated with an oil inlet pipeline 34, a T oil port of the second reversing valve 37 is communicated with an oil return pipeline 35, a first reversing valve 36 is an O-shaped three-position four-way electromagnetic reversing valve, the second reversing valve 37 is a Y-shaped three-position four-way electromagnetic reversing valve, specifically, an electromagnetic coil of the second reversing valve 37 is connected with the inclination angle sensor 40, the inclination angle sensor 40 is usually arranged on a telescopic arm 2 and used for detecting whether the telescopic arm 2 is vertical to the ground or not in the lifting process, the inclination angle sensor 40 is common equipment of technicians in the field and can be purchased, the common equipment can be used according to required models, when the common equipment is used, the detection signal is fed back to a control unit by the inclination angle sensor 40, the control unit is usually a PLC or a single chip microcomputer, and then the control unit controls the corresponding reversing valve, and controls the corresponding hydraulic actuators. When the automobile chassis support device works, a rodless cavity of a horizontal oil cylinder 32 is filled with oil, the horizontal oil cylinder 32 drives a vertical oil cylinder 33 to move horizontally, after the horizontal oil cylinder 32 extends to the maximum position, a first reversing valve 36 is locked, an O-shaped three-position four-way electromagnetic reversing valve is switched to the middle position, the horizontal oil cylinder 32 keeps the current state, the rodless cavity of the vertical oil cylinder 33 starts to be filled with oil, meanwhile, hydraulic oil opens a second hydraulic control one-way valve 39, the hydraulic oil in a rod cavity of the vertical oil cylinder 33 can return to an oil return pipeline 35 to support the automobile chassis 1 to rise, after four corners of the automobile chassis 1 are all horizontal, a Y-shaped three-position four-way electromagnetic reversing valve is switched to the middle position, the rod cavity of the vertical oil cylinder 33 is not filled with oil any more, under the action of the first hydraulic control one-way valve 38 and the second hydraulic control one-way valve 39, the vertical oil cylinder 33 keeps at the current position, and once one corner of the automobile chassis 1 inclines due to overlarge bearing force, the tilt sensor 40 is connected to the electromagnetic coil of the second directional valve 37, the rodless cavity of the vertical cylinder 33 starts to feed oil, the piston rod of the vertical cylinder 33 extends out to compensate the tilt amount, and the vertical cylinder 33 is kept at the position after the tilt sensor 40 is horizontal.

As is well known, the larger the supporting area of the automobile chassis 1, the higher the stability of the automobile chassis 1 and accordingly the stability of the telescopic arm 2, and for this reason, the horizontal cylinder 32 is provided as a two-stage hydraulic cylinder, which increases the horizontal extension length of the hydraulic leg. Specifically, as shown in fig. 18, the horizontal cylinder 32 includes a first cylinder 3201 installed in a fixed position, a second cylinder 3202 is installed in the first cylinder 3201 in a sliding manner, a third cylinder 3203 is installed in the second cylinder 3202 in a sliding manner, the third cylinder 3203 is identical to a piston rod of the horizontal cylinder 32, sliding seal mechanisms are respectively arranged between the second cylinder 3202 and the first cylinder 3201 and between the second cylinder 3202 and the third cylinder 3203 to prevent leakage of hydraulic oil, an end of the third cylinder 3203 is connected to the vertical cylinder 33, the first cylinder 3201 is communicated with the second cylinder 3202, a plunger 3204 installed in the second cylinder 3202 in a sliding manner is fixedly installed at an end of the third cylinder 3203, a third central cylinder 3207 is installed in the third cylinder 3203, an oil port opening 3208 is arranged at an end of the third central cylinder 3207 far from the plunger 3204, the other end of the third central cylinder 3207 penetrates through the plunger 3204 and extends into the second cylinder 3202, only a second central cylinder 3206 is sleeved in the third central cylinder 3207, the second center cylinder 3206 is adapted to the second cylinder 3202, the first center cylinder 3205 is sleeved in the second center cylinder 3206, the first center cylinder 3205 is adapted to the first cylinder 3201, the end of the first center cylinder 3205 is connected with a horizontal first working oil port 3209 at the end of the first cylinder 3201, the horizontal first working oil port 3209 is communicated with an oil through port 3208, a horizontal second working oil port 3210 is arranged at the end of the first cylinder 3201, the horizontal second working oil port 3210 is communicated with an inner cavity of the first cylinder 3201, the horizontal second working oil port 3210 is communicated with an oil port a of the first reversing valve 36, and the horizontal first working oil port 3209 is communicated with an oil port B of the first reversing valve 36. When the horizontal second working oil port 3210 is used for oil feeding, hydraulic oil in the oil feeding pipeline 34 enters the first cylinder 3201, the plunger 3204 is firstly pushed to drive the third cylinder 3203 to extend out, and meanwhile, the vertical oil cylinder 33 is driven to move horizontally, hydraulic oil in the third cylinder 3203 returns to the oil return pipeline 35 through the oil feeding port 3208, after the third cylinder 3203 extends out completely, oil feeding continues to be performed in the first cylinder 3201, the second cylinder 3202 continues to extend outwards, and meanwhile, the vertical oil cylinder 33 is driven to continue to move horizontally, the horizontal oil cylinder 32 with the structure increases the horizontal moving distance of the vertical oil cylinder 33, the supporting area is increased, and the supporting stability is further improved.

A first sleeve 3301 and a second sleeve 3302 are arranged in parallel in the third cylinder 3203, one end of the first sleeve 3301 is connected with the first hydraulic control one-way valve 38, the other end of the first sleeve 3301 penetrates through the plunger 3204 and extends into the second cylinder 3202, one end of the second sleeve 3302 is connected with the second hydraulic control one-way valve 39, the other end of the second sleeve 3302 penetrates through the plunger 3204 and extends into the second cylinder 3202, a third sleeve 3303 is sleeved in the first sleeve 3301, a fourth sleeve 3304 is sleeved in the second sleeve 3302, the third sleeve 3303 and the fourth sleeve 3304 are both matched with the second cylinder 3202, a fifth sleeve 3305 is sleeved in the third sleeve 3303, a sixth sleeve 3306 is sleeved in the fourth sleeve 3304, the fifth sleeve 3305 and the sixth sleeve 3306 are both matched with the first cylinder 3201, a sliding sealing structure is arranged between the first sleeve 3301 and the third sleeve 3303 and between the third sleeve 3303 and the second sleeve 3302, leakage of the second sleeve 3302 is avoided, and a sliding sealing structure is also arranged between the fourth sleeve 3304 and the sliding sealing structure is also arranged between the fourth sleeve 3304, to prevent the hydraulic oil from leaking, the end of the fifth sleeve 3305 is connected to the port a of the second directional valve 37, and the end of the sixth sleeve 3306 is connected to the port B of the second directional valve 37. The structure makes full use of the internal space of the horizontal oil cylinder 32, the oil inlet and oil return pipeline 35 of the vertical oil cylinder 33 is arranged in the structure, and a plurality of external hydraulic oil pipes do not need to be dragged, so that the structure is simple and practical.

When the automobile chassis support is used, an automobile carries the telescopic arm 2 to reach a designated position, the front hydraulic support leg 4 and the transition hydraulic cylinder 7 extend out to stably support the automobile chassis 1, the overturning hydraulic cylinder 5 begins to extend out to push the telescopic arm 2 to overturn, the telescopic arm 2 is overturned to a vertical state, namely, when the telescopic arm 2 is perpendicular to the ground, the rear hydraulic support leg 6 extends out to be supported on the ground, the transition hydraulic cylinder 7 retracts at the moment, the automobile and the telescopic arm 2 are supported on the ground through the front hydraulic support leg 4 and the rear hydraulic support leg 6, at the moment, the telescopic arm 2 can be lifted up to work, the structure has large support area, the gravity center of the telescopic arm 2 is low, the stability is high, when the verticality of the telescopic arm 2 needs to be adjusted, the transition hydraulic cylinder 7 extends out to be matched with the rear hydraulic support leg 6 on the telescopic arm 2 to jointly compensate the inclination angle of the telescopic arm 2, because the transition hydraulic cylinder 7 and the rear hydraulic support leg 6 are close to the telescopic arm 2, easy to adjust, so their co-action is required at this time. The telescopic arm 2 is turned to a vertical state, the second fixed support 20 is gradually pulled to the first fixed support 9 around a hinge shaft 22 under the action of hoisting power, when the second fixed support 20 is combined with the first fixed support 9, the third power mechanism pushes a positioning pin 23 to connect the first fixed support 9 and the second fixed support 20 together, the second sliding support 21 is extended out according to the distance of a rescue target, the first movable support is extended out at the same time, a counterweight 11 is used for adjusting the balance of a working bucket 3 to ensure successful rescue, when the telescopic arm 2 is lifted, a lifting steel wire rope 20404 is sequentially wound and fixed, a piston rod of a lifting hydraulic oil cylinder 20409 of a last-stage telescopic cylinder 203 is extended out, firstly, an innermost telescopic joint 20403 with the lightest weight in the last-stage telescopic cylinder 203 is lifted and lifted sequentially section by section, and then a lifting hydraulic oil cylinder 20409 of a second telescopic cylinder starts to lift, and the like, the telescopic boom is lifted step by step until the telescopic boom 2 is lifted to the required height, when the telescopic boom is descended, the piston rod of the lifting hydraulic oil cylinder 20409 of the first-stage telescopic cylinder 201 retracts, the secondary outer-layer telescopic joint 20402 with the heaviest weight first falls back, then falls back section by section in sequence, and the piston rod of the lifting hydraulic oil cylinder 20409 of the second-stage telescopic cylinder 202 retracts, so that the second-stage telescopic cylinder 202 retracts, and finally the last-stage telescopic cylinder 203 retracts. The outermost telescopic joint 20401 of the first-stage telescopic cylinder 201 is located on the ground, pressure oil of the lifting hydraulic oil cylinder 20409 of the first-stage telescopic cylinder 201 can be directly introduced from the oil inlet pipeline 34 and the oil return pipeline 35, the lifting hydraulic oil cylinder 20409 of the second-stage telescopic cylinder 202 is installed inside the innermost telescopic joint 20403 of the first-stage telescopic cylinder 201, an oil pipe conveying device 205 needs to be installed at the bottom of the outermost telescopic joint 20401 of the first-stage telescopic cylinder 201 to supply oil to the lifting hydraulic oil cylinder 20409 of the second-stage telescopic cylinder 202, and similarly, an oil pipe conveying device 205 is arranged in the innermost telescopic joint 20403 of the first-stage telescopic cylinder 201 to supply oil to the lifting hydraulic oil cylinder 20409 of the third-stage telescopic cylinder, and so on, an oil pipe conveying device 205 is arranged in the innermost telescopic joint 20403 of the previous-stage telescopic cylinder to supply oil to the lifting hydraulic oil cylinder 20409 of the next-stage telescopic cylinder until the lifting hydraulic oil cylinder 20409 of the last-stage telescopic cylinder completes oil supply, the hydraulic oil provided by the previous stage telescopic cylinder not only supplies oil to the lifting hydraulic oil cylinder 20409 of the next stage telescopic cylinder, but also supplies oil to the oil pipe conveying device 205 positioned in the next stage telescopic cylinder, so that the hydraulic oil is continuously conveyed along with the lifting of the telescopic arm 2.

According to the embodiment of the invention, the telescopic arm 2 is hinged to the tail end of the automobile chassis 1, when the automobile chassis is in work, the telescopic arm 2 is turned to be in a vertical state through the turning hydraulic oil cylinder 5, the bottom of the telescopic arm 2 is close to the ground, and compared with a traditional structure that the crank arm is positioned above the automobile chassis 1, the gravity center of the telescopic arm 2 is reduced, and the stability of the telescopic arm 2 is improved.

The telescopic joint structure can vertically lift and is sleeved together, the length of a train is greatly reduced, the length of the train is 15.3 meters, the width of the train is 2.5 meters, the height of the train is 4 meters, the maximum rescue height is 144 meters, the maximum height fire rescue radius is 15 meters, the turning radius is relatively reduced, compared with a fire truck with the same rescue height, the telescopic joint structure has the advantages that the applicability is wider, the flexibility is higher, particularly, in the height range of 144 meters, the rescue blind area does not exist, the situation that the rescue radius within the range of 15 meters is always met within the height of 144 meters can be realized, and one fire truck can meet the whole rescue task of a high-rise building.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.