Automobile crane
阅读说明：本技术 一种汽车起重机 (Automobile crane ) 是由 曾杏兰 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种汽车起重机,属于起重机机械设备领域。本发明技术方案要点：在对起重臂起到回转作用的回转机构外端设置第二回转机构,第二回转机构一侧固定连接有一支撑臂,支撑臂末端底部设有一折叠支腿,支腿下方末端设有支撑转轮,转轮直径方向与两个回转机构的旋转方向相切,这样当支撑转轮展开时,可辅助第二回转机构带动支撑臂绕着第二回转机构带动中心转动,随起重臂旋转而转动,防止起吊时发生车身侧翻,本发明与传统单纯使用H型支腿进行支撑稳定的方式相比,本发明设置的支撑臂长度可跨越底盘长度的两端,并且可通过折叠拉伸增加其长度,大大提高了灵活跨越距离,并且可随起重臂同步转动至其下方,装置作业时的稳定性得到大大提升。(The invention discloses an automobile crane, and belongs to the field of crane mechanical equipment. The technical scheme of the invention is as follows: the outer end of the swing mechanism which plays a role of rotating the crane boom is provided with a second swing mechanism, one side of the second swing mechanism is fixedly connected with a supporting arm, the bottom of the tail end of the supporting arm is provided with a folding supporting leg, the tail end below the supporting leg is provided with a supporting rotating wheel, the diameter direction of the rotating wheel is tangent to the rotating direction of the two swing mechanisms, thus when the supporting rotating wheel is unfolded, the supporting arm can be assisted to drive the supporting arm to rotate around the driving center of the second rotating mechanism and rotate along with the rotation of the crane arm, so as to prevent the vehicle body from turning over during hoisting, compared with the traditional mode of simply using the H-shaped supporting leg for supporting and stabilizing, the supporting arm provided by the invention has the advantages that the length of the supporting arm can span two ends of the length of the chassis, and its length is increased in the folding tensile of accessible, has improved nimble leap distance greatly to can rotate to its below along with the jib loading boom is synchronous, stability when the device operation is promoted greatly.)
1. An automobile crane comprises a chassis (1) with a vehicle-mounted end playing a main bearing role, wherein one end of the chassis (1) is fixedly connected with a cockpit (101), a first rotating structure (202) is arranged at one end of the chassis (1) close to the tail of a vehicle, a bearing platform (2) is fixedly connected onto the first rotating mechanism (202), a hoisting operation cabin (201) is fixedly connected onto one side of the bearing platform (2), a rotating pair A (203) is fixedly connected onto the middle position of the bearing platform (2), and a cargo boom (4) is movably connected onto the bearing platform (2) through the rotating pair A (203) at the upper end, the automobile crane is characterized in that a second rotating mechanism (601) is rotatably connected onto the chassis (1) and outside the first rotating mechanism (202) at the lower end of the bearing platform (2), the second rotating mechanism (601) and the first rotating mechanism (202) are positioned on the same central axis, and the two rotating mechanisms can independently operate, one side of the second swing mechanism (601) is fixedly connected with a supporting arm (6) which is in a horizontal position, the supporting arm (6) is in a rectangular columnar structure, a folding supporting leg (7) is arranged at the bottom of one end, away from the second swing mechanism (601), of the supporting arm, and a cavity which is in a size shape corresponding to the folding supporting leg (7) is arranged at a position corresponding to the folding supporting leg (7) at the lower end of the supporting arm (6).
2. The automobile crane according to claim 1, wherein the upper end of the folding leg (7) is provided with a revolute pair D (701) and is movably connected in a cavity corresponding to the left end of the supporting arm (6) through the revolute pair D (701), the lower end of the revolute pair D (701) is fixedly connected with a telescopic rod sleeve (702), the lower end of the telescopic rod sleeve (702) is movably connected with a telescopic rod (703), the left side of the telescopic rod (703) is rotatably connected with a supporting runner (704), the lower position of the telescopic rod sleeve (702) is hinged with a supporting rod A (706), the other end of the supporting rod A (706) is hinged with a supporting rod B (707), the other end of the supporting rod B (707) is hinged with the right supporting arm (6), the upper position of the supporting rod A (706) and the telescopic rod sleeve (702) is hinged with a connecting rod (705), the other end of the connecting rod (705) is fixedly connected with a steel wire rope (709), the other end of the steel wire rope (709) is sleeved on a rotating winding drum (602) fixedly connected with the supporting arm (6), and a sliding sleeve (708) is sleeved on the supporting rod B (707).
3. A crane according to claim 1, wherein the length of the support arm (6) is such that it spans the left and right ends of the chassis (1), and the support arm (6) is of a stretchable construction.
4. Truck crane according to claim 1, characterized in that the supporting arm (6) is located in a circular arc-shaped configuration at the other end head remote from the second slewing gear (601).
5. Truck crane according to claim 1, characterized in that the supporting arm (6) is of steel frame construction.
6. A truck crane according to claim 1, characterized in that the chassis (1) is provided with wheels (8) for moving and walking around, and a plurality of groups of wheels (8) are provided for reducing the bearing capacity of each tire according to actual needs.
7. The automobile crane is characterized in that four H-shaped supporting legs (5) are arranged on two sides of the chassis (1), a fixed supporting leg (501) in the H-shaped supporting legs (5) is fixedly connected to the chassis (1), a movable supporting leg (502) is arranged in the middle of the fixed supporting leg (1), a vertical supporting leg lifting cylinder (503) is fixedly connected to the tail end, extending to the outer side, of the movable supporting leg (502), and a horizontal supporting plate (504) is fixedly connected to the lower end of the supporting leg lifting cylinder (503).
8. Truck crane according to claim 1, characterized in that said two pairs of H-legs (5) are symmetrically arranged on both sides of the chassis (4) and that said two pairs of H-legs (5) are spaced further apart
The automobile crane according to claim 1, wherein the other end of the bearing platform (2) far away from the revolute pair A (203) is fixedly connected with a revolute pair B (204), the revolute pair B (204) is movably connected with a luffing cylinder (3), the other end of the luffing cylinder (3) is provided with a revolute pair C (301), and the luffing cylinder (3) is connected with the crane boom (4) through the left revolute pair C (301).
Technical Field
The invention belongs to the field of crane mechanical equipment, and particularly relates to an automobile crane.
Background
The automobile crane is one kind of crane installed on common or special automobile chassis and has driving cab separated from the crane control cab. The crane has the advantages of good maneuverability and rapid transfer. The defects are that supporting legs are needed during working, the vehicle cannot run under load, and the vehicle is not suitable for working on soft or muddy places. The chassis performance of the automobile crane is equal to that of a lorry with the same total weight of the whole automobile, and the automobile crane meets the technical requirements of road vehicles, so that the automobile crane can pass through various roads without resistance. Such cranes are generally provided with two cabs for getting on and off the crane and the outriggers must be extended to maintain stability during operation. The range of lifting capacity is very large, and can be from 8 tons to 1600 tons, and the number of axles of the chassis can be from 2 to 10. The crane type with the largest yield and the most widely used.
The hoisting machine (crane) is an important transportation tool in the national production and manufacturing process, and is a machine capable of horizontally moving and vertically hoisting objects within a certain range; the manual labor can be reduced, and the labor productivity can be greatly improved. The automobile crane is a machine combining a lifting device and an automobile chassis, has the characteristics of operation cyclicity and intermittent action, is mainly used for tasks which are difficult to complete by manpower, and is mainly used for engineering construction, and engineering teams, building industries, electric power installation departments and the like of general construction need the automobile crane to assist in construction. Mainly comprises a lifting arm, an amplitude variation arm, a rotation arm and an automobile chassis. The development of mobile cranes has been promoted by the development of hydraulic technology, the electronics industry, high strength steel and the automotive industry. Self-heavy, mechanically driven mobile cranes with long work preparation times have been replaced by hydraulic mobile cranes. The hydraulic system of the hydraulic automobile crane adopts a hydraulic pump and a quantitative or variable motor to realize the independent or combined action of the lifting rotation, the amplitude variation, the boom extension and the landing leg extension of the crane. The motor is protected from overheating and has a safety device to prevent erroneous operation. The hydraulic automobile crane with large tonnage selects a multiple gear pump, and the acceleration of the actions can be realized during confluence. The hydraulic system is provided with an automatic overload safety valve, a buffer valve, a hydraulic lock and the like so as to prevent accidents caused by overload or stall and sudden rupture of an oil pipe during the operation of the crane. The automobile crane is provided with an amplitude indicator and a height limiter to prevent overload or over-extension distance, and the winding drum and the pulley are provided with a device for preventing a steel wire rope from jumping a groove.
The automobile crane plays a very important role in engineering construction, and is the crane type with the largest yield and the most extensive use; therefore, it is necessary to develop and perfect the operation principle of the truck crane. However, the truck crane is bulky and complex in structure, the heavy truck crane needs to be equipped with a large power engine when carrying heavy objects and running at a certain speed, and the engine power is wasted because the engine power is not matched and the crane engine needs to be additionally equipped during the operation of the crane. In addition, the existing crane built in the carriage consumes less energy and occupies small space, the suspension arm of the existing crane is generally in a telescopic arm type or folding arm type structure, and the telescopic arm or the folding arm needs to be unfolded to hoist the heavy object when in use, but the crane with the structure can only be used as auxiliary equipment to hoist or pull the heavy object, but cannot directly act on the heavy object.
The existing automobile crane is usually longer in design of a crane boom in order to enlarge the distance and the height which can be lifted, larger span can be realized through the H-shaped support legs, the stability of the whole machine is obviously superior, so the hydraulic automobile crane mostly adopts the H-shaped support legs, but because the width of a vehicle body is limited, the span length of the stretched support legs is limited, when the crane boom rotates to the position vertical to the vehicle body for operation, rollover is easy to occur, and only the support leg positioned at the position of one side where the crane boom rotates can play a stabilizing role, so the practicability of the hydraulic automobile crane is greatly reduced.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the automobile crane is provided for solving the problem that the existing automobile crane is easy to cause body rollover during lateral lifting.
In order to solve the technical problems, the invention adopts the following technical scheme:
an automobile crane comprises a chassis with a vehicle-mounted end playing a main bearing role, wherein one end of the chassis is fixedly connected with a cockpit, a first rotary structure is arranged at one end of the chassis close to the tail of a vehicle, a bearing platform is fixedly connected onto the first rotary structure, a hoisting operation cabin is fixedly connected onto one side of the bearing platform, a revolute pair A is fixedly connected to the middle position of the bearing platform, and the bearing platform is movably connected with a crane boom through the revolute pair A at the upper end; the supporting device is characterized in that a second rotary mechanism is rotatably connected to the outer side of a first rotary mechanism on the chassis and located at the lower end of the bearing table, the second rotary mechanism and the first rotary mechanism are located on the same central shaft, the two rotary mechanisms can independently operate, a supporting arm in a horizontal position is fixedly connected to one side of the second rotary mechanism, the supporting arm is of a rectangular columnar structure, a folding supporting leg is arranged at the bottom of one end, away from the second rotary mechanism, of the supporting arm, and a cavity which is large and small and corresponds to the folding supporting leg is arranged at a position, corresponding to the folding supporting leg, of the lower end.
Preferably, folding landing leg upper end is equipped with revolute pair D and through revolute pair D swing joint in the cavity that the support arm left end corresponds, revolute pair D lower extreme fixedly connected with telescopic link cover, telescopic link cover lower extreme swing joint has the telescopic link, the telescopic link left side is rotated and is connected with the support runner, telescopic link cover has vaulting pole A by lower position department hinged joint, vaulting pole A other end hinged joint has vaulting pole B, vaulting pole B other end hinged joint is on the support arm that leans on the right, telescopic link sheathes in and lean on vaulting pole A's top position department hinged joint has the connecting rod, connecting rod other end fixedly connected with wire rope, wire rope other end cover is on the rotation reel of fixed connection on the support arm, the cover has sliding sleeve on the vaulting pole B.
Preferably, the length of the supporting arm can span the left end and the right end of the chassis, and the supporting arm can adopt a stretchable structure.
Preferably, the supporting arm is located at the arc-shaped structure of the other end head far away from the second slewing mechanism.
Preferably, the support arm may be of steel frame construction.
Preferably, the periphery of the chassis is provided with automobile wheels for moving and walking, and a plurality of groups of automobile wheels can be arranged for reducing the bearing capacity of each tire according to actual requirements.
Preferably, the chassis both sides are equipped with four H type landing legs, fixed leg fixed connection in the H type landing leg is on the chassis, be equipped with movable landing leg in the middle of the fixed leg, the terminal fixedly connected with vertical landing leg lift cylinder that movable landing leg extends to the outside, landing leg lift cylinder lower extreme fixed connection has the horizontally supporting disk.
Preferably, the two pairs of H-shaped supporting legs are symmetrically distributed on two sides of the chassis, and the two pairs of H-shaped supporting legs are far away from each other
Preferably, the other end of the bearing platform, which is far away from the revolute pair A, is fixedly connected with a revolute pair B, the revolute pair B is movably connected with a luffing cylinder, the other end of the luffing cylinder is provided with a revolute pair C, and the luffing cylinder is connected with the crane boom through the revolute pair C at the left end.
Compared with other methods, the method has the beneficial technical effects that:
the outer end of the rotary mechanism which plays a role in rotating the crane boom is provided with the second rotary mechanism, one side of the second rotary mechanism is fixedly connected with a support arm, the bottom of the tail end of the support arm is provided with a foldable support leg, the tail end below the support leg is provided with a support rotating wheel, the diameter direction of the rotating wheel is tangent to the rotating direction of the two rotary mechanisms, so that when the support rotating wheel is unfolded and contacts the ground, the second rotary mechanism can be assisted to drive the support arm to rotate around the second rotary mechanism driving center, and the support arm can rotate to the position right below the crane boom along with the rotation of the crane boom, thereby preventing the vehicle body from turning over when adjusting heavy objects. And can rotate to its below along with the jib loading boom is synchronous, and the stability when the device operation is promoted greatly.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is an enlarged schematic view of a portion of the folding leg 7 of FIG. 1;
fig. 3 is a schematic view of the unfolded foldable leg 7 in fig. 2;
FIG. 4 is a left side view of FIG. 3;
FIG. 5 is an enlarged schematic view of the H-shaped leg of FIG. 1;
FIG. 6 is a top view of FIG. 1;
FIG. 7 is a schematic view of the apparatus of the present invention in operation;
1. a chassis; 101. a cockpit; 2. a bearing table; 201. a hoisting operation cabin; 202. a first swing mechanism; 203. a revolute pair A; 204. a revolute pair B; 3. a variable amplitude oil cylinder; 301. a revolute pair C; 4. a cargo boom; 5. an H-shaped support leg; 501. fixing the supporting legs; 502. a movable leg; 503. a support leg lift cylinder; 504. a leg plate; 6. a support arm; 601. a second swing mechanism; 602. rotating the drum; 7. folding the support legs; 701. a revolute pair D; 702. a telescopic rod sleeve; 703. a telescopic rod; 704. supporting the rotating wheel; 705. a connecting rod; 706. a stay bar A; 707. a stay bar B; 708. a sliding sleeve; 709. a wire rope; 8. a vehicle wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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. The words "upper", "lower", "left" and "right" when used herein are merely intended to designate corresponding upper, lower, left and right directions in the drawings, and do not limit the structure thereof.
As shown in fig. 1 to 7, an automobile crane includes a chassis 1 having a vehicle-mounted end for mainly bearing, wherein one end of the chassis 1 is fixedly connected with a cockpit 101, a first swing structure 202 is disposed at a position of the chassis 1 close to a tail end of the vehicle, a carrier platform 2 is fixedly connected to the first swing structure 202, a crane operation cabin 201 is fixedly connected to one side of the carrier platform 2, a revolute pair a203 is fixedly connected to a middle position of the carrier platform 2, and the carrier platform 2 is movably connected to a boom 4 through the revolute pair a203 at an upper end; the structure of the portable bearing platform comprises a chassis 1, a first rotating mechanism 202 arranged at the lower end of a bearing platform 2 and a second rotating mechanism 601 which is connected with the chassis 1 in a rotating mode, wherein the first rotating mechanism 202 is arranged on the chassis 1 and is located at the lower end of the bearing platform 2, the second rotating mechanism 601 and the first rotating mechanism 202 are located on the same central axis, the two rotating mechanisms can independently operate, a supporting arm 6 which is located at the horizontal position is fixedly connected to one side of the second rotating mechanism 601, the supporting arm 6 is of a rectangular columnar structure, a folding supporting leg 7 is arranged at the bottom of one end, far away from the second rotating mechanism 601, of the supporting arm, and a.
The folding leg comprises a
The length of the supporting
The supporting
The supporting
The periphery of the chassis 1 is provided with
The improved multifunctional support is characterized in that four H-shaped supporting legs 5 are arranged on two sides of the chassis 1, fixed supporting
The two pairs of H-shaped supporting legs 5 are symmetrically distributed at two sides of the
The other end of the
The device of the invention comprises the following specific embodiments:
when the device of the invention is ready for operation, the H-shaped supporting leg 5 is unfolded and the supporting leg plate 504 is dropped on the ground through the supporting leg lifting oil cylinder 503 to play a first stabilizing role, on the other hand, the vehicle is prevented from inclining so that the inclined side automobile wheels 8 are pressed by force to cause the inclination of the vehicle body or the damage of tires, when the first rotary mechanism 202 drives the jib boom 4 to rotate to the position shown in figure 7 or the jib 4 rotates to the position vertical to the chassis 1, which is most dangerous if the heavy object is hoisted, at this time, the second rotary mechanism 601 rotates to drive the side supporting arm 6 to rotate out and to the chassis 1, at this time, the rotary drum 602 rotates counterclockwise, so that the telescopic rod sleeve 702 in the folding supporting leg 7 rotates clockwise to the vertical position shown in figure 3 along with the revolute pair D701 under the action of gravity, at this time, the strut A706 and the strut B707 rotate to be in the same straight line position, at this time, the, make two vaulting poles unable relative rotations to rotate the restriction to telescopic link cover 702, telescopic link 703 descends to make and supports runner 704 ground connection this moment, plays the supporting role to support arm 6 end, makes support arm 6 play to support the device main part stably, and because support arm 6 lower extreme is rotatable contact with ground, makes support arm 6 rotate along with jib loading boom 4 rotates, plays firm effect the very first time.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
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