阅读说明：本技术 油缸疲劳试验测试机 (Oil cylinder fatigue test machine ) 是由 任广兴 任翊豪 张东强 刘华东 刘义 韩玮 于 2021-09-27 设计创作，主要内容包括：本发明涉及流体压力测试技术领域,尤其涉及一种油缸疲劳试验测试机,包括设备台、压力装置、第一限位组件、第二限位组件以及多个固定架,且压力装置、第一限位组件和第二限位组件沿一斜线依次倾斜排列,油缸固定于第一限位组件和第二限位组件上,油缸在外部液压系统的配合下进行伸缩动作,压力装置配合油缸在油缸进行伸缩动作时为其提供可控的负载力。本发明的压力装置、第一限位组件、第二限位组件呈倾斜线分布,待测油缸固定在第一限位组件和第二限位组件上,压力装置包含的负重箱通过重力下滑,直接对油缸施加负载,因为其结构简单,所以运行更稳定,寿命更长,并且搭配使用的配重块数量可以调节,从而可调整负载力。(The invention relates to the technical field of fluid pressure testing, in particular to a testing machine for a fatigue test of an oil cylinder, which comprises an equipment table, a pressure device, a first limiting assembly, a second limiting assembly and a plurality of fixing frames, wherein the pressure device, the first limiting assembly and the second limiting assembly are sequentially obliquely arranged along an oblique line, the oil cylinder is fixed on the first limiting assembly and the second limiting assembly, the oil cylinder performs telescopic action under the coordination of an external hydraulic system, and the pressure device is matched with the oil cylinder to provide controllable load force for the oil cylinder when the oil cylinder performs telescopic action. The pressure device, the first limiting assembly and the second limiting assembly are distributed in an inclined line, the oil cylinder to be tested is fixed on the first limiting assembly and the second limiting assembly, the load box contained in the pressure device slides downwards through gravity to directly apply load to the oil cylinder, and the oil cylinder is stable in operation and long in service life due to the fact that the structure is simple, and the number of the counterweight blocks used in matching can be adjusted, so that the load force can be adjusted.)

1. The utility model provides an hydro-cylinder fatigue test machine, includes equipment platform (1) and a plurality of mount (5), its characterized in that: the device is characterized by further comprising a pressure device (2), a first limiting assembly (3) and a second limiting assembly (4), wherein the pressure device (2), the first limiting assembly (3) and the second limiting assembly (4) are all arranged on corresponding fixing frames (5), the pressure device (2), the first limiting assembly (3) and the second limiting assembly (4) are sequentially and obliquely arranged along an oblique line, the fixing frames (5) are all fixed on the equipment table (1), an oil cylinder (6) to be tested is fixed on the first limiting assembly (3) and the second limiting assembly (4), the oil cylinder (6) performs telescopic action under the coordination of an external hydraulic system, and the pressure device (2) provides controllable load force for the oil cylinder (6) when the oil cylinder (6) performs telescopic action; first spacing subassembly (3) and second spacing subassembly (4) structure are the same, and all include splint (31), damping pad (32), shell (33) and a plurality of landing leg (34), shell (33) are connected on corresponding mount (5) through a plurality of landing leg (34), splint (31) are installed inside shell (33), and hydro-cylinder (6) are fixed in the middle of splint (31), are formed with the activity chamber that supplies splint (31) free activity in shell (33) between shell (33) and splint (31), and damping pad (32) are filled the activity intracavity.

2. The oil cylinder fatigue test machine according to claim 1, characterized in that: pressure device (2) are including guide rail (21), slider (22) and heavy burden case (23), slider (22) sliding connection is on guide rail (21), and heavy burden case (23) are fixed on slider (22), and guide rail (21) slope sets up downwards, heavy burden case (23) slide to the lower extreme of guide rail (21) under the action of gravity, heavy burden case (23) are equipped with connector (24) towards the one side of hydro-cylinder (6) of being examined, and connector (24) are connected with heavy burden case (23) through the flange, and the telescopic link front end and the connector (24) of hydro-cylinder (6) are connected.

3. The oil cylinder fatigue test machine according to claim 2, characterized in that: and a blocking rod (7) is arranged on one side of the lower end of the first guide rail (21), and the blocking rod (7) is matched with the weight box (23) to block the weight box (23).

4. The oil cylinder fatigue test machine according to claim 2, characterized in that: the utility model discloses a heavy duty box, including heavy duty box (23), curb plate (231), balancing weight (234) of all can cartridge between the both sides slot (233) of pairing, heavy duty box (23) top sets up to uncovered (235), uncovered (235) cooperation opening (232) use, curb plate (231) seal opening (232) from uncovered (235) cartridge in heavy duty box (23), curb plate (231) demolish back at heavy duty box (23) top formation opening (232), opening (232) both sides evenly distributed have slot (233) of a plurality of perpendicular to curb plate (231).

5. The oil cylinder fatigue test machine according to claim 1, characterized in that: the clamping plate (31) is composed of two semicircular blocks (311) which are arranged in a mirror symmetry mode, side lugs (312) which extend outwards in a straight line are arranged on two sides of each semicircular block (311), and a bolt (314) and a nut (315) for locking are arranged between the side lugs (312) on the same side of the two semicircular blocks (311); the opposite sides of the two semicircular blocks (311) are respectively provided with a trapezoidal groove (313), the oil cylinder (6) is fixed in the trapezoidal grooves (313) of the two semicircular blocks (311), and locking is carried out through the matching of a bolt (314) and a nut (315).

6. The oil cylinder fatigue test machine according to claim 5, characterized in that: a plurality of ball heads (316) are arranged on the front surface and the back surface of each of the two semicircular blocks (311), and the ball heads (316) are in contact connection with the inner wall of the shell (33).

7. The oil cylinder fatigue test machine according to claim 1, characterized in that: the shell (33) adopts a split structure, and the clamping plate (31) is fixed in the middle.

8. The oil cylinder fatigue test machine according to claim 1, characterized in that: a second guide rail (81), a second sliding block (82), an installation plate (83), a positioning support (84) and an air cylinder (85) are arranged on the fixed frame (5) corresponding to the second limiting assembly (4), the second guide rail (81) is installed on the fixed frame (5) corresponding to the second limiting assembly (4), the second sliding block (82) is in sliding fit with the second guide rail (81), the installation plate (83) is fixed on the second sliding block (82), and the second limiting assembly (4) is fixed on the installation plate (83); the cylinder (85) is fixed on the fixing frame (5) corresponding to the second limiting component (4), the output end of the cylinder (85) is connected with the mounting plate (83) to drive the second limiting component (4) to move along the second guide rail (81), and the guide direction of the second guide rail (81) is consistent with the telescopic direction of the oil cylinder (6); the positioning support (84) is fixed on the mounting plate (83) and located behind the second limiting component (4), the rear half part of the oil cylinder (6) is fixed on the second limiting component (4), and the tail end of the oil cylinder (6) is fixed through the positioning support (84).

Technical Field

The invention relates to the technical field of fluid pressure testing, in particular to a testing machine for a fatigue test of an oil cylinder.

Background

The oil cylinder is an important component of a hydraulic system and can convert hydraulic energy into mechanical energy of linear reciprocating motion. Because of its simple structure. The working is reliable, and the device is widely applied to mechanical systems. At present, oil cylinder manufacturers are more, the performance and the quality of an oil cylinder can meet the requirements of a host machine on one hand, and can also reach the standard indexes of the oil cylinder, so that various oil cylinder testing equipment is derived.

Disclose a double-acting cylinder fatigue test device as in the chinese utility model patent of publication number CN205639174U, during the use, be connected double-acting cylinder's oil inlet and oil return opening with hydraulic pressure case and control cabinet, start double-acting cylinder fatigue test device through the control button on the control cabinet, double-acting cylinder's piston end stretches out, push crank, drive axis of rotation, third hinge rod and fourth hinge rod rotate, first hinge rod and second hinge rod upwards rotate, the balancing weight is lifted up. When the piston end of the double-acting oil cylinder retracts, the crank is pushed to drive the rotating shaft, the third hinge rod and the fourth hinge rod to rotate, the first hinge rod and the second hinge rod rotate downwards, and the balancing weight falls. The operation is repeated until the sealing ring of the double-acting oil cylinder leaks oil and releases pressure or the welding seam of the double-acting oil cylinder leaks oil, the operation times of the piston end of the double-acting oil cylinder on the display screen of the operating platform are recorded, the operation times of the piston end of the double-acting oil cylinder are used as fatigue indexes, the fatigue indexes provide reference for the production process of the double-acting oil cylinder, the production quality of the double-acting oil cylinder is guaranteed, and the defective rate of the double-acting oil cylinder in production is reduced.

Although the device can complete the test, the following defects still exist:

the oil cylinder fatigue test device is used for detecting that an oil cylinder telescopic rod is connected with a balancing weight through parts such as a crank, a rotating shaft, a third hinge rod, a fourth hinge rod, a first hinge rod, a second hinge rod and the like, the number of parts is too large and complex, the oil cylinder is easy to damage and the service life is short when the oil cylinder runs for a long time;

the load provided by the balancing weight is fixed and cannot be adjusted in time according to the test requirement;

the cylinder body does not vibrate strongly when the oil cylinder runs slowly, but the endurance test usually runs continuously at the highest speed under the rated working condition, the cylinder body shakes when the oil cylinder runs at the high speed, and the limit tool of the existing oil cylinder limits the deviation force forcibly, so that the tool loss is serious.

Disclosure of Invention

The embodiment of the invention provides a testing machine for a fatigue test of an oil cylinder, which aims to solve the technical problem in the prior art.

The embodiment of the invention adopts the following technical scheme: the oil cylinder fatigue test machine comprises an equipment table, a pressure device, a first limiting assembly, a second limiting assembly and a plurality of fixing frames, wherein the pressure device, the first limiting assembly and the second limiting assembly are all arranged on the corresponding fixing frames, the pressure device, the first limiting assembly and the second limiting assembly are sequentially arranged in an inclined manner along an inclined line, the fixing frames are all fixed on the equipment table, an oil cylinder is fixed on the first limiting assembly and the second limiting assembly, the oil cylinder performs telescopic action under the coordination of an external hydraulic system, and the pressure device is matched with the oil cylinder to provide controllable load force for the oil cylinder when the oil cylinder performs telescopic action; first spacing subassembly and the spacing subassembly structure of second are the same, and all include splint, damping pad, shell and a plurality of landing leg, the shell is connected on the mount that corresponds through a plurality of landing legs, splint are installed inside the shell, and the hydro-cylinder is fixed in the middle of the splint, is formed with the activity chamber that supplies splint free activity in the shell between shell and the splint, and the damping pad is filled the activity intracavity.

Further, pressure device includes guide rail one, slider one and heavy burden case, slider one sliding connection is on guide rail one, and the heavy burden case is fixed on slider one, and the slope of guide rail one sets up downwards, the heavy burden case slides to the lower extreme of guide rail one under the action of gravity, the heavy burden case is equipped with the connector that can dispose according to the hydro-cylinder model towards the one side of the hydro-cylinder of being tested, and the connector passes through the flange and is connected with the heavy burden case, and the telescopic link front end and the connector of hydro-cylinder are connected.

Furthermore, one side of the lower end of the first guide rail is provided with a blocking rod, and the blocking rod is matched with the load box to block the load box.

Further, heavy burden case upside is equipped with removable curb plate, and the curb plate forms the opening after demolising at heavy burden roof portion, and opening both sides evenly distributed has the slot of a plurality of perpendicular to curb plates, all can cartridge a balancing weight between the paired both sides slot, and heavy burden roof portion sets up to uncovered, uncovered cooperation the opening uses, and the curb plate seals the opening at the heavy burden incasement from uncovered cartridge.

Furthermore, the clamping plate is composed of two semicircular blocks which are arranged in a mirror symmetry mode, side lugs which extend outwards in a straight line are arranged on two sides of each semicircular block, and a bolt and a nut for locking are arranged between the side lugs on the same side of the two semicircular blocks; the opposite sides of the two semicircular blocks are provided with trapezoidal grooves, and the oil cylinder is fixed in the trapezoidal grooves of the two semicircular blocks and locked by matching bolts and nuts.

Furthermore, a plurality of ball heads are arranged on the front surface and the back surface of each of the two semicircular blocks and are in contact connection with the inner wall of the shell.

Furthermore, the shell adopts a split structure, and the clamping plate is fixed in the middle.

Further, be equipped with guide rail two, slider two, mounting panel, locating support and cylinder on the mount that the spacing subassembly of second corresponds, guide rail two is installed on the mount that the spacing subassembly of second corresponds, slider two and two sliding fit of guide rail, the mounting panel is fixed on slider two, the spacing subassembly of second is fixed on the mounting panel, the cylinder is fixed on the mount that the spacing subassembly of second corresponds, the output and the mounting panel of cylinder are connected, drive the spacing subassembly of second and remove along guide rail two, the direction of guide rail two is unanimous with the flexible direction of hydro-cylinder, the locating support is fixed on the mounting panel and is located the spacing subassembly rear of second, the half is fixed on the spacing subassembly of second after the hydro-cylinder, the hydro-cylinder tail end passes through the locating support to be fixed.

The embodiment of the invention adopts at least one technical scheme which can achieve the following beneficial effects:

the pressure device, the first limiting assembly and the second limiting assembly are distributed in an inclined line, the oil cylinder to be tested is fixed on the first limiting assembly and the second limiting assembly, the load box contained in the pressure device slides downwards through gravity to directly apply load to the oil cylinder, and the oil cylinder is simple in structure, so that the oil cylinder is stable in operation and longer in service life.

And secondly, the weight box can load the corresponding number of balancing weights according to different test requirements, so that the load force can be adjusted.

The structure of the first limiting assembly is the same as that of the second limiting assembly, the first limiting assembly and the second limiting assembly respectively comprise a clamping plate, a vibration damping pad and a shell, the oil cylinder is clamped by the clamping plate, a movable cavity for the clamping plate to freely move in the shell is formed between the shell and the clamping plate, the vibration damping pad is filled in the movable cavity, when the oil cylinder rapidly moves, the vibration force of the clamping plate is absorbed through the vibration damping pad, and the service life of the vibration damping pad is longer compared with that of an existing limiting tool.

Fourthly, the clamping plate is composed of two semicircular blocks which are arranged in a mirror symmetry mode, side lugs which extend outwards in a straight line are arranged on two sides of each semicircular block, and a bolt and a nut for locking are arranged between the side lugs on the same side of the two semicircular blocks; the opposite sides of the two semicircular blocks are provided with trapezoidal grooves, and the oil cylinder is fixed in the trapezoidal grooves of the two semicircular blocks and is locked by matching bolts and nuts; the fixing method can facilitate the fixing of the oil cylinder, and can be suitable for the oil cylinder test within a certain diameter range, aiming at different models.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a front view of a portion of the structure of the present invention;

FIG. 3 is a top view of a portion of the structure of the present invention;

FIG. 4 is a schematic diagram showing the matching state of the oil cylinder to be tested and the load box of the present invention;

FIG. 5 is an exploded view of the weight box of the present invention;

FIG. 6 is an exploded view of a second stop assembly in accordance with the present invention;

fig. 7 is a schematic structural view of the splint of the present invention.

Reference numerals: 1. an equipment table; 2. a pressure device; 21. a first guide rail; 22. a first sliding block; 23. a weight box; 231. a side plate; 232. an opening; 233. a slot; 234. a balancing weight; 235. opening the mouth; 24. a connector; 25. a bolt; 3. a first limit component; 31. a splint; 311. a semicircular block; 312. a lateral ear; 313. a trapezoidal groove; 314. a bolt; 315. a nut; 316. a ball head; 32. a vibration damping pad; 33. a housing; 34. a support leg; 4. a second limiting component; 5. a fixed mount; 6. an oil cylinder; 61. a connector; 7. a blocking lever; 81. a second guide rail; 82. a second sliding block; 83. mounting a plate; 84. positioning the bracket; 85. and a cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

The embodiment of the invention provides an oil cylinder fatigue test testing machine, which comprises an equipment table 1, a pressure device 2, a first limiting component 3, a second limiting component 4 and a plurality of fixing frames 5, wherein the pressure device 2, the first limiting component 3 and the second limiting component 4 are all arranged on the corresponding fixing frames 5, the pressure device 2, the first limiting component 3 and the second limiting component 4 are sequentially and obliquely arranged along an oblique line, the fixing frames 5 are all fixed on the equipment table 1, an oil cylinder 6 is fixed on the first limiting component 3 and the second limiting component 4, the oil cylinder 6 performs telescopic action under the coordination of an external hydraulic system, and the pressure device 2 is matched with the oil cylinder 6 to provide controllable load force for the oil cylinder 6 during telescopic action; the first limiting assembly 3 and the second limiting assembly 4 are identical in structure, refer to fig. 6, and comprise a clamping plate 31, a damping pad 32, a shell 33 and a plurality of supporting legs 34, the shell 33 is connected to the corresponding fixing frame 5 through the supporting legs 34, the clamping plate 31 is installed inside the shell 33, the oil cylinder 6 is fixed in the middle of the clamping plate 31, a movable cavity for the clamping plate 31 to freely move in the shell 33 is formed between the shell 33 and the clamping plate 31, and the damping pad 32 is filled in the movable cavity. The first limiting component 3 and the second limiting component 4 solve the problem of fixing the oil cylinder 6 in the test process, and cannot limit the horizontal movement of the oil cylinder 6, and the vibration caused by the quick expansion and contraction of the oil cylinder 6 is absorbed by the vibration absorption pad 32, so that the service life of the limiting components can be prolonged; and the pressure device 2 of the present invention is capable of providing a controllable load force during the test.

Preferably, referring to fig. 2, the pressure device 2 includes a first guide rail 21, a first slider 22 and a weight box 23, the first slider 22 is slidably connected to the first guide rail 21, the weight box 23 is fixed to the first slider 22, the first guide rail 21 is disposed obliquely downward, the weight box 23 slides to the lower end of the first guide rail 21 under the action of gravity, a connector 24 capable of being configured according to the model of the oil cylinder 6 is disposed on one side of the weight box 23 facing the oil cylinder 6 to be tested, the connector 24 is connected to the weight box 23 through a flange, the front end of the telescopic rod of the oil cylinder 6 is connected to the connector 24, and preferably, the connector 24 is connected to a connecting head 61 at the front end of the oil cylinder 6 through a bolt 25, as shown in fig. 4.

Preferably, referring to fig. 1, a blocking rod 7 is disposed at one side of the lower end of the first guide rail 21, and the blocking rod 7 is matched with the load box 23 and used for blocking the load box 23 and preventing the load box 23 from sliding out of the first guide rail 21 when the oil cylinder 6 is not connected.

Preferably, referring to fig. 5, a detachable side plate 231 is disposed on an upper side of the load box 23, an opening 232 is formed at the top of the load box 23 after the side plate 231 is removed, a plurality of slots 233 perpendicular to the side plate 231 are uniformly distributed on both sides of the opening 232, a weight 234 can be inserted between the slots 233 on both sides of the pair, an opening 235 is disposed at the top of the load box 23, the opening 235 is used in cooperation with the opening 232, and the side plate 231 is inserted into the load box 23 from the opening 235 to close the opening 232. The design of load box 23 is for according to the experimental demand of difference, load the balancing weight 234 that corresponds quantity, adjust the loading capacity, the curb plate 231 need be opened before the balancing weight 234 loads, then insert the balancing weight 234 in slot 233, load the back, need install the curb plate 231 back on load box 23 again, this curb plate 231 is the important spare part that the balancing weight 234 jumped out load box 23 when avoiding quick test, curb plate 231 can save during the slow speed test of generality.

Preferably, referring to fig. 6 and 7, the clamping plate 31 is composed of two semicircular blocks 311 arranged in a mirror symmetry manner, side lugs 312 extending outwards in a straight line are arranged on two sides of each semicircular block 311, and a bolt 314 and a nut 315 for locking are arranged between the side lugs 312 on the same side of the two semicircular blocks 311; the opposite sides of the two semicircular blocks 311 are respectively provided with a trapezoidal groove 313, and the oil cylinder 6 is fixed in the trapezoidal grooves 313 of the two semicircular blocks 311 and locked by matching a bolt 314 and a nut 315.

Preferably, referring to fig. 7, a plurality of balls 316 are mounted on both front and back surfaces of the two semicircular blocks 311, the balls 316 are in contact connection with an inner wall of the housing 33, and the balls 316 are used to make the movement of the clamp plate 31 smoother.

Preferably, referring to fig. 6, the housing 33 is divided into two pieces from the middle, and the clamping plate 31 is fixed in the middle.

Preferably, referring to fig. 2 and 3, the second fixing frame 5 corresponding to the second limiting component 4 is provided with a second guide rail 81, a second sliding block 82, a mounting plate 83, a positioning bracket 84 and a cylinder 85, two 81 of guide rails are installed on the mount 5 that the spacing subassembly 4 of second corresponds, and two 82 of slide blocks and two 81 sliding fit of guide rails, mounting panel 83 are fixed on two 82 of slide blocks, and the spacing subassembly 4 of second is fixed on mounting panel 83, and cylinder 85 is fixed on the mount 5 that the spacing subassembly 4 of second corresponds, and the output and the mounting panel 83 of cylinder 85 are connected and are used for the drive mounting panel 83 drives the spacing subassembly 4 of second and removes along two 81 of guide rails, and the direction of two 81 of guide rails is unanimous with the flexible direction of hydro-cylinder 6, and locating support 84 fixes on mounting panel 83 and is located the spacing subassembly 4 rear of second, and the half is fixed on the spacing subassembly 4 of second for the hydro-cylinder 6 tail end is fixed through locating support 84.

To implement the fatigue test machine for the oil cylinder 6, the equipment table 1 and the hydraulic system need to be built, and the PLC is given to build an equipment control system, so that the cooperative work of machinery, electricity and a sensor is realized. The working process is as follows:

the power supply of the equipment is turned on, the control system gives an order to the air cylinder 85, so that the second limiting component 4 retreats relative to the first limiting component 3, and after the specified position is reached, the rear half part of the oil cylinder 6 to be measured is inserted into the second limiting component 4 for fixing; then, the cylinder 85 acts again to enable the second limiting component 4 to move forward relative to the first limiting component 3, and the front half part of the oil cylinder 6 to be tested is driven to be inserted into the first limiting component 3 for fixing;

after the fixing is finished, the load box 23 is connected with the oil cylinder 6 to be tested, finally, the hydraulic system is connected with an oil port of the oil cylinder 6 to be tested through an oil pipe, the oil cylinder 6 to be tested is driven to stretch and contract repeatedly through the hydraulic system, and the operation capacity of the oil cylinder 6 under the rated working condition is tested.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.