阅读说明：本技术 油缸试验装置及试验方法 (Oil cylinder testing device and testing method ) 是由 张勇 许东 李克飞 熊智伟 于 2021-07-29 设计创作，主要内容包括：本公开提供了一种油缸试验装置及试验方法,属于机械设备技术领域。测试油缸放在支撑台上,推动缸将测试油缸的测试活塞杆完全推回测试油缸内,测试油缸存储压力。释放测试油缸的内部压力测试活塞杆推出,限位组件中连接轴、撞板随测试活塞杆运动。撞板的第一限位面在测试油缸的径向的两侧均有面积,支撑台上有至少两个分布在推动缸的径向上的两侧的防撞减震器,防撞减震器的压缩杆正对第一限位面,且压缩杆伸出挡块,挡块具有与第一限位面平行的第二限位面。撞板与挡块限制了测试活塞杆的位置,得到较为准确的测试油缸的最大行程,运动时长测试得到。得到的测试油缸的行程与时长的参数较为准确,则可以较为准确地判断出测试油缸的工作性能。(The disclosure provides an oil cylinder testing device and an oil cylinder testing method, and belongs to the technical field of mechanical equipment. The test oil cylinder is placed on the support table, the pushing cylinder pushes the test piston rod of the test oil cylinder back into the test oil cylinder completely, and the test oil cylinder stores pressure. The internal pressure testing piston rod of the release testing oil cylinder is pushed out, and the connecting shaft and the collision plate in the limiting assembly move along with the testing piston rod. The first spacing face that hits the board all has the area in the radial both sides of test hydro-cylinder, has two at least crashproof bumper shock absorbers that distribute in the radial ascending both sides of propelling cylinder on the brace table, and the compression rod of crashproof bumper shock absorber just is first spacing face, and the dog is stretched out to the compression rod, and the dog has the spacing face of second parallel with first spacing face. The collision plate and the stop block limit the position of the test piston rod, the maximum stroke of the test oil cylinder is relatively accurate, and the movement duration is tested. The obtained parameters of the stroke and the duration of the test oil cylinder are accurate, and the working performance of the test oil cylinder can be accurately judged.)

1. The utility model provides a hydro-cylinder test device which characterized in that, hydro-cylinder test device includes:

a support assembly (1), the support assembly (1) comprising a support table (11);

the driving assembly (2), the driving assembly (2) comprises a pushing cylinder (21), and the pushing cylinder (21) is connected with the supporting platform (11);

the limiting component (3), the limiting component (3) comprises a connecting shaft (31), a collision plate (32), at least two anti-collision shock absorbers (33) and stop blocks (34) which are in one-to-one correspondence with the anti-collision shock absorbers (33), one end of the connecting shaft (31) is coaxial with and detachably connected with a pushing piston rod (211) of the pushing cylinder (21), the peripheral wall of the other end of the connecting shaft (31) is provided with a connecting thread (311) of a testing cylinder,

the striking plate (32) is connected with the connecting shaft (31), the striking plate (32) is provided with a first limiting surface (321) which is vertical to the axis of the connecting shaft (31), the midpoint of the orthographic projection of the first limiting surface (321) on the surface of the supporting table (11) is positioned on the orthographic projection of the axis of the pushing piston rod (211) on the surface of the supporting table (11),

at least two crashproof bumper shock absorbers (33) with brace table (11) link to each other, just two at least crashproof bumper shock absorbers (33) distribute in the radial ascending both sides of propulsion cylinder (21), each side of propulsion cylinder (21) all has one the compression rod (331) of crashproof bumper shock absorber (33) are just right first spacing face (321), every compression rod (331) all overlap and are equipped with one dog (34), just compression rod (331) with minimum distance between first spacing face (321) is less than dog (34) with minimum distance between first spacing face (321), dog (34) have with spacing face (341) of second that first spacing face (321) are parallel.

2. The oil cylinder test device according to claim 1, wherein the limiting assembly (3) comprises two anti-collision shock absorbers (33), a symmetry plane is arranged between the two anti-collision shock absorbers (33), and the symmetry plane and a symmetry plane in the length direction of the pushing piston rod (211) are in the same plane.

3. The cylinder tester according to claim 1, wherein the outer peripheral wall of the connection shaft (31) has a coaxial annular positioning groove (312), and one side wall of the annular positioning groove (312) is connected to the test cylinder connection thread (311).

4. The oil cylinder test device according to any one of claims 1 to 3, wherein the outer peripheral wall of the connecting shaft (31) is provided with a coaxial annular positioning plate (313), and the collision plate (32) abuts against the end face, away from the test oil cylinder connecting thread (311), of the annular positioning plate (313).

5. The oil cylinder test device according to claim 4, wherein the striking plate (32) is provided with a through hole (322), the through hole (322) is sleeved on the connecting shaft (31) and is in clearance fit with the connecting shaft (31),

the limiting assembly (3) further comprises a locking block (35), the locking block (35) is in threaded connection with the connecting shaft (31), and the collision plate (32) is located between the annular positioning plate (313) and the locking block (35).

6. The oil cylinder test device according to claim 5, characterized in that the locking block (35) is annular, the inner peripheral wall of the locking block (35) is provided with threads, and the outer peripheral wall of the locking block (35) is provided with four planes which are distributed at equal intervals in the circumferential direction.

7. The oil cylinder test device according to any one of claims 1 to 3, wherein the limiting assembly (3) further comprises a pushing cylinder (36), one end of the pushing cylinder (36) is coaxially connected with one end of the connecting shaft (31), and the other end of the pushing cylinder (36) is coaxially connected with a pushing piston rod (211) of the pushing cylinder (21).

8. The oil cylinder test device according to any one of claims 1 to 3, characterized in that the oil cylinder test device further comprises a guide assembly (4), the guide assembly (4) comprises a slide rail (42) and a slide block (41), the slide rail (42) is connected with the support table (11), the slide block (41) is slidably arranged on the slide rail (42), and the slide block (41) is connected with the striking plate (32).

9. A cylinder test method, characterized in that the cylinder test method is implemented using the cylinder test apparatus of claim 1, the cylinder test method comprising:

providing a test oil cylinder and an energy accumulator communicated with the test oil cylinder;

placing the test oil cylinder on a support table;

connecting the connecting shaft with a piston rod of the test oil cylinder through a test oil cylinder connecting thread of the connecting shaft;

the pushing cylinder pushes the connecting shaft to completely press the testing piston rod of the testing oil cylinder into the cylinder seat of the testing oil cylinder;

closing a communication channel between the test oil cylinder and the energy accumulator;

disassembling the connecting shaft and the pushing piston rod;

the pushing piston rod of the pushing cylinder is fully retracted;

opening a communication channel between the test oil cylinder and the energy accumulator to enable the test piston rod to pop up until the collision plate is attached to the stop block;

acquiring the time length of the test piston rod extending out of the cylinder seat of the test oil cylinder until the collision plate is attached to the stop block;

and acquiring the maximum stroke of the test piston rod after the test piston rod extends out of the cylinder seat of the test oil cylinder.

10. The cylinder testing method of claim 9, wherein before obtaining the maximum stroke after the test piston rod is extended from the cylinder base of the test cylinder, the cylinder testing method further comprises:

checking whether a gap exists between the first limiting surface of the collision plate and the second limiting surface of the stop block by using a feeler gauge;

if a gap exists between the first limiting surface of the collision plate and the second limiting surface of the stop block, the collision plate is adjusted until the first limiting surface of the collision plate is superposed with the second limiting surface of the stop block.

Technical Field

The disclosure relates to the technical field of mechanical equipment, in particular to an oil cylinder testing device and an oil cylinder testing method.

Background

The oil cylinder is a common mechanical device for driving, and the oil cylinder at least comprises a cylinder seat and a piston rod, and the piston rod is slidably inserted in the cylinder seat. After the oil cylinder is manufactured, in order to ensure that the oil cylinder can realize normal piston driving, the stroke of a piston rod of the oil cylinder is tested.

At present, when the stroke of a piston rod of an oil cylinder is tested, the piston rod of the oil cylinder is controlled to be released after being contracted to the maximum degree, and then the piston rod moves to the maximum stroke of the piston rod. However, the piston rod of the oil cylinder is easily affected by foreign factors such as impurities in the moving process, so that the piston rod is deviated, or the measurement of the piston rod is not accurate enough, so that the finally obtained stroke parameter of the piston rod reflecting the performance of the oil cylinder is not accurate enough, and the working performance of the oil cylinder is difficult to effectively judge.

Disclosure of Invention

The embodiment of the disclosure provides an oil cylinder testing device and an oil cylinder testing method, which can ensure stable operation of an oil cylinder and obtain more accurate parameters reflecting the performance of the oil cylinder so as to effectively judge the working performance of the oil cylinder. The technical scheme is as follows:

the embodiment of the present disclosure provides an oil cylinder test device, the oil cylinder test device includes:

a support assembly including a support table;

the driving assembly comprises a pushing cylinder, and the pushing cylinder is connected with the supporting platform;

spacing subassembly, spacing subassembly include the connecting axle, hit the board, two at least anticollision bumper shock absorbers and with the dog of anticollision bumper shock absorber one-to-one, the one end of connecting axle with the promotion piston rod of propelling cylinder is coaxial and can dismantle continuously, the periphery wall of the other end of connecting axle has test hydro-cylinder connecting thread.

The collision plate is connected with the connecting shaft and is provided with a first limit surface vertical to the axis of the connecting shaft, the midpoint of the orthographic projection of the first limit surface on the surface of the supporting table is positioned on the orthographic projection of the axis of the pushing piston rod on the surface of the supporting table,

at least two anticollision bumper shock absorbers with the brace table links to each other, just two at least anticollision bumper shock absorbers distribute the radial ascending both sides of propelling movement jar, each side of propelling movement jar all has one the compression rod of anticollision bumper shock absorber is just right first spacing face, every the compression rod all is equipped with one the dog, just the compression rod with minimum distance between the first spacing face is less than the dog with minimum distance between the first spacing face, the dog have with the spacing face of the parallel second of first spacing face.

Optionally, the limiting assembly comprises two anti-collision dampers, a symmetry plane is arranged between the two anti-collision dampers, and the symmetry plane and a symmetry plane in the length direction of the push piston rod are in the same plane.

Optionally, the peripheral wall of connecting axle has coaxial annular constant head tank, a lateral wall of annular constant head tank with test cylinder connecting thread meets.

Optionally, the periphery wall of connecting axle has coaxial annular locating plate, hit the board with annular locating plate keeps away from the terminal surface counterbalance of test hydro-cylinder connecting thread.

Optionally, the collision plate is provided with a through hole which is sleeved on the connecting shaft and is in clearance fit with the connecting shaft,

the limiting assembly further comprises a locking block, the locking block is connected with the connecting shaft in a threaded mode, and the collision plate is located between the annular positioning plate and the locking block.

Optionally, the latch segment is ring-shaped, the inner peripheral wall of the latch segment has threads, and the circumference of the outer peripheral wall of the latch segment has four equally spaced planes.

Optionally, the limiting assembly further comprises a pushing cylinder, one end of the pushing cylinder is coaxially connected with one end of the connecting shaft, and the other end of the pushing cylinder is coaxially connected with a pushing piston rod of the pushing cylinder.

Optionally, the oil cylinder test device further comprises a guide assembly, the guide assembly comprises a slide rail and a slide block, the slide rail is connected with the support table, the slide block is slidably arranged on the slide rail, and the slide block is connected with the collision plate.

The embodiment of the disclosure provides an oil cylinder test method, which is implemented by adopting the oil cylinder test device, and comprises the following steps:

providing a test oil cylinder and an energy accumulator communicated with the test oil cylinder;

placing the test oil cylinder on a support table;

connecting the connecting shaft with a piston rod of the test oil cylinder through a test oil cylinder connecting thread of the connecting shaft;

the pushing cylinder pushes the connecting shaft to completely press the testing piston rod of the testing oil cylinder into the cylinder seat of the testing oil cylinder;

closing a communication channel between the test oil cylinder and the energy accumulator;

disassembling the connecting shaft and the pushing piston rod;

the pushing piston rod of the pushing cylinder is fully retracted;

opening a communication channel between the test oil cylinder and the energy accumulator to enable the test piston rod to pop up until the collision plate is attached to the stop block;

acquiring the time length of the test piston rod extending out of the cylinder seat of the test oil cylinder until the collision plate is attached to the stop block;

and acquiring the maximum stroke of the test piston rod after the test piston rod extends out of the cylinder seat of the test oil cylinder.

Optionally, before obtaining the maximum stroke after the test piston rod extends out of the cylinder seat of the test cylinder, the cylinder testing method further includes:

checking whether a gap exists between the first limiting surface of the collision plate and the second limiting surface of the stop block by using a feeler gauge;

if a gap exists between the first limiting surface of the collision plate and the second limiting surface of the stop block, the collision plate is adjusted until the first limiting surface of the collision plate is superposed with the second limiting surface of the stop block.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

the test oil cylinder is placed on a supporting table of the supporting assembly, and the pushing cylinder in the driving assembly is connected with the supporting table. One end of a connecting shaft in the limiting assembly is connected with a push rod piston rod of the pushing cylinder, the other end of the connecting shaft is coaxially connected with the end of the testing piston rod through a connecting thread of the testing cylinder, the pushing cylinder can completely push the testing piston rod back to the testing cylinder, and the testing cylinder stores pressure. Then the connecting shaft is separated from the pushing piston rod, and the pushing piston rod is completely retracted. The internal pressure of the test oil cylinder is released to completely push out the test piston rod, the connecting shaft and the test piston rod move together, and the collision plate connected with the connecting shaft in the limiting assembly also moves together with the test piston rod until the movement stroke of the test piston rod reaches the maximum value. The collision plate is provided with a first limiting surface perpendicular to the axis of the connecting shaft, the midpoint of the orthographic projection of the first limiting surface on the surface of the supporting table is positioned on the orthographic projection of the axis of the pushing piston rod on the surface of the supporting table, and the first limiting surface has a certain area on both sides of the pushing cylinder and the radial direction of the testing oil cylinder. The supporting table is provided with at least two anti-collision shock absorbers which are distributed on two radial sides of the pushing cylinder, compression rods of the anti-collision shock absorbers are over against a first limiting surface, each compression rod is sleeved with a stop dog, the minimum distance between each compression rod and the corresponding first limiting surface is smaller than the minimum distance between each stop dog and the corresponding first limiting surface, and each stop dog is provided with a second limiting surface parallel to the corresponding first limiting surface. The compression rod of the anti-collision shock absorbers on the two sides of the pushing cylinder can be in contact with the collision plate firstly, the acting forces on the two sides of the collision plate and the two sides of the test piston rod are balanced when the impact is relieved, the positions of the collision plate and the test piston rod are finely adjusted until the collision plate and the test piston rod are attached to the second limiting surface of the stop block at a relatively accurate position, the collision plate and the stop block limit the position of the test piston rod, the axis position of the final position of the test piston rod is relatively accurate at the moment, and a relatively accurate stroke of the test oil cylinder can be obtained. The position where the first limiting surface of the collision plate is attached to the second limiting surface of the stop block in the limiting assembly is used as the maximum position where the test piston rod can be pushed out, so that the maximum formation of the test piston rod can be accurately obtained. The extending time of the test oil cylinder can be from the moment that the test piston rod extends out of the cylinder seat of the test oil cylinder to the moment that the collision plate is attached to the stop block. The obtained parameters of the stroke and the duration of the test oil cylinder are accurate, and the working performance of the test oil cylinder can be accurately judged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an oil cylinder testing device provided by the embodiment of the disclosure;

FIG. 2 is a schematic structural diagram of a stopper provided in an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a connecting shaft provided by the embodiment of the disclosure;

FIG. 4 is a schematic structural diagram of a striker plate provided in the embodiments of the present disclosure;

FIG. 5 is a top view of a striker plate provided by embodiments of the present disclosure;

fig. 6 is a schematic structural diagram of a locking block provided in an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a push cylinder provided in an embodiment of the present disclosure;

FIG. 8 is a side view of a cylinder testing apparatus provided in the embodiments of the present disclosure;

FIG. 9 is a schematic structural view of a second mounting portion provided by an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of an L-shaped positioning pad provided in the embodiments of the present disclosure;

fig. 11 is a schematic structural diagram of a slide rail provided in the embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a slider provided by an embodiment of the present disclosure;

fig. 13 is a flowchart of a cylinder test mode provided in the embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

For convenience of understanding, fig. 1 is provided herein for illustration, fig. 1 is a schematic structural diagram of a cylinder testing apparatus provided in an embodiment of the present disclosure, and it can be seen with reference to fig. 1 that the embodiment of the present disclosure provides a cylinder testing apparatus, including:

the support assembly 1, support assembly 1 includes a support platform 11.

The driving assembly 2, the driving assembly 2 includes a pushing cylinder 21, and the pushing cylinder 21 is connected with the supporting platform 11.

The limiting assembly 3 comprises a connecting shaft 31, a collision plate 32, at least two anti-collision shock absorbers 33 and stop blocks 34 corresponding to the anti-collision shock absorbers 33 one to one, one end of the connecting shaft 31 is coaxial with and detachably connected with a pushing piston rod 211 of the pushing cylinder 21, and a peripheral wall of the other end of the connecting shaft 31 is provided with a testing cylinder connecting thread 311. The striking plate 32 is connected with the connecting shaft 31, the striking plate 32 is provided with a first limiting surface 321 perpendicular to the axis of the connecting shaft 31, and the midpoint of the orthographic projection of the first limiting surface 321 on the surface of the supporting table 11 is positioned on the orthographic projection of the axis of the pushing piston rod 211 on the surface of the supporting table 11. At least two bumper shock absorbers 33 are connected with the supporting table 11, and at least two bumper shock absorbers 33 are distributed on two radial sides of the pushing cylinder 21, each side of the pushing cylinder 21 is provided with a compression rod 331 of one bumper shock absorber 33 right opposite to the first limiting surface 321, each compression rod 331 is sleeved with a stop 34, the minimum distance between the compression rod 331 and the first limiting surface 321 is smaller than the minimum distance between the stop 34 and the first limiting surface 321, and the stop 34 is provided with a second limiting surface 341 parallel to the first limiting surface 321.

The testing oil cylinder 100 is placed on the supporting platform 11 of the supporting assembly 1, the pushing cylinder 21 connected with the supporting platform 11 in the driving assembly 2 can be used for controlling the movement of the testing piston rod 1001 of the testing oil cylinder 100, and the limiting assembly 3 can effectively control the movement precision of the testing piston rod 1001 of the testing oil cylinder 100. During specific testing, one end of the connecting shaft 31 in the limiting component 3 can be coaxially connected with the push rod piston rod of the pushing cylinder 21, and the other end of the connecting shaft is coaxially connected with the end of the testing piston rod 1001 through the testing cylinder connecting thread 311, so that the pushing cylinder 21 can coaxially and stably push the completely extended testing piston rod 1001 back to the inside of the testing cylinder 100, and the position of the testing piston rod 1001 is ensured to be accurate. After the testing piston rod 1001 is completely pushed back to the inside of the testing cylinder 100, the pressure for completely releasing the testing piston rod 1001 is accumulated inside the testing cylinder 100. The connecting shaft 31 is separated from the push piston rod 211, and the push piston rod 211 is fully retracted into the push cylinder 21 so as not to affect the extension of the test piston rod 1001, and then the internal pressure of the test oil cylinder 100 is released to completely push out the test piston rod 1001. In the process of completely pushing out the test piston rod 1001, the connecting shaft 31 and the test piston rod 1001 move together, and the striking plate 32 connected with the connecting shaft 31 in the limiting assembly 3 also moves together with the test piston rod 1001 until the movement stroke of the test piston rod 1001 reaches the maximum value. The striking plate 32 has a first limiting surface 321 perpendicular to the axis of the connecting shaft 31, the midpoint of the orthographic projection of the first limiting surface 321 on the surface of the support platform 11 is located on the orthographic projection of the axis of the pushing piston rod 211 on the surface of the support platform 11, and the first limiting surface 321 has a certain area on both sides of the pushing cylinder 21 and the radial direction of the test cylinder 100. The support table 11 is provided with at least two crash dampers 33 distributed on two radial sides of the pushing cylinder 21, the compression rods 331 of the crash dampers 33 are opposite to the first limiting surface 321, each compression rod 331 is sleeved with a stop 34, the minimum distance between the compression rod 331 and the first limiting surface 321 is smaller than the minimum distance between the stop 34 and the first limiting surface 321, and the stop 34 is provided with a second limiting surface 341 parallel to the first limiting surface 321. The compression rods 331 of the anti-collision dampers 33 on both sides of the push cylinder 21 contact the collision plate 32 first, so as to balance the acting forces on both sides of the collision plate 32 and the test piston rod 1001 while relieving the impact, and finely adjust the positions of the collision plate 32 and the test piston rod 1001 until the collision plate 32 and the test piston rod 1001 are attached to the second limit surface 341 of the stopper 34 at a more accurate position, and the collision plate 32 and the stopper 34 limit the position of the test piston rod 1001, at this time, the axial position of the final position of the test piston rod 1001 is more accurate, so that a more accurate stroke of the test cylinder 100 can be obtained. The position where the first stopper face 321 of the striking plate 32 is attached to the second stopper face 341 of the stopper 34 in the stopper assembly 3 is set as the maximum position where the test piston rod 1001 can be pushed out, so that the maximum formation of the test piston rod 1001 can be accurately obtained. The length of time that the test cylinder 100 extends can be from the instant the test piston rod 1001 extends from the base of the test cylinder 100 to the instant the striker plate 32 abuts the stop 34. The obtained parameters of the stroke and the duration of the test oil cylinder 100 are accurate, and the working performance of the test oil cylinder 100 can be accurately judged.

In addition, in the implementation mode provided by the disclosure, the used structure is simpler, and the more accurate performance test of the oil cylinder can be completed with lower preparation cost.

It should be noted that, the compression rod 331 of the crash cushion 33 provided in the present disclosure is directly opposite to the first limiting surface 321, which means that the axis of the compression rod 331 is perpendicular to the first limiting surface 321, and the orthographic projections of the compression rods 331 of all the crash cushions 33 on the first limiting surface 321 are located inside the first limiting surface 321.

Optionally, the limiting assembly 3 includes two crash dampers 33, a symmetry plane is disposed between the two crash dampers 33, and the symmetry plane and a symmetry plane in the length direction of the pushing piston rod 211 are the same plane.

The symmetry plane of two anticollision bumper shock absorbers 33 is the coplanar with the symmetry plane on the length direction of promotion piston rod 211, and two anticollision bumper shock absorbers 33 can effectively balance the effort of the radial both sides of test hydro-cylinder 100, guarantees that the axis of the test piston rod 1001 of final test hydro-cylinder 100 remains stable, and just only two anticollision bumper shock absorbers 33 also can effectively control spacing subassembly 3 holistic cost.

It should be noted that, in other implementations provided by the present disclosure, the number of the crash dampers 33 may also be 3 or 4 or more, which is not limited by the present disclosure.

Illustratively, each crash cushion 33 may include a case, a compression rod 331, and a cylindrical spring, one surface of the case having a circular hole, the compression rod 331 being coaxially inserted into the circular hole, the cylindrical spring being located in the case and having both ends connected to an inner wall of the case and an end surface of one end of the compression rod 331, respectively, and an axis of the cylindrical spring coinciding with an axis of the compression rod 331. The compression rod 331 is pressed by the striking plate 32 to compress the barrel spring, and the compression rod 331 is compressed into the case, so that the striking plate 32 of the compression rod 331 is further moved to be connected with the stopper 34.

In other implementations provided by the present disclosure, the case of the crash cushion 33 may also be a cylinder or an irregular shape, and the shape of the spring may also be changed, which is not limited by the present disclosure.

It is noted that the compression bar 331 may be made of metal. The stability is comparatively and difficult wearing and tearing.

Fig. 2 is a schematic structural diagram of a stopper provided in an embodiment of the present disclosure, and referring to fig. 2, the stopper 34 may be a rectangular parallelepiped structure having a plug hole 342, and the plug hole 342 is used for inserting the compression rod 331 at a gap. Is convenient for installation and fixation.

Fig. 3 is a schematic structural diagram of a connection shaft according to an embodiment of the present disclosure, and as can be seen from fig. 3, an outer peripheral wall of the connection shaft 31 has a coaxial annular positioning groove 312, and one side wall of the annular positioning groove 312 is connected to a connection thread 311 of a test cylinder.

The annular positioning groove 312 can play a positioning role as a stop position of the connecting thread 311 of the test cylinder, so that the connecting shaft 31 is ensured to be well connected with the test piston rod 1001 of the test cylinder 100, the situation that the connecting shaft 31 is not inserted into the test piston rod 1001 enough in depth or is inserted too deeply is not easy to occur, and measurement and acquisition of subsequent stroke data are facilitated.

It should be noted that the outer peripheral wall of the test piston rod 1001 of the test cylinder 100 at the end away from the cylinder block has a threaded groove for connecting with the connecting shaft 31.

Alternatively, the outer peripheral wall of the connecting shaft 31 is provided with a coaxial annular positioning plate 313, and the striking plate 32 abuts against the end surface of the annular positioning plate 313 away from the connecting screw 311 of the test cylinder.

The annular positioning plate 313 can play a positioning role, and when the annular positioning plate 313 is in contact with the cylinder base of the test cylinder 100, the annular positioning plate can be used as a position where the test piston rod 1001 is completely pushed into the test cylinder 100, so that positioning and stroke judgment are facilitated.

As can be seen from fig. 3, the outer peripheral wall of the other end of the connecting shaft 31 may also have a connecting thread, which may be connected to the push piston rod 211 of the push cylinder 21. A stable connection between the connecting shaft 31 and other structures is facilitated.

It should be noted that, in a direction from one end of the connecting shaft 31 to the other end of the connecting shaft 31, the connecting screw 311 of the test cylinder, the annular positioning groove 312, the annular positioning plate 313 and the connecting screw are sequentially distributed.

Alternatively, the diameter of the end of the connecting shaft 31 remote from the push cylinder 21 is larger than the diameter of the end of the connecting shaft 31 close to the push cylinder 21. The cost of the connecting shaft 31 can be effectively controlled, and meanwhile, the connecting shaft 31 can be used for testing of a hydraulic oil cylinder with larger power consumption or larger tonnage.

Fig. 4 is a schematic structural view of the striking plate according to the embodiment of the present disclosure, and referring to fig. 1 and 4, the striking plate 32 has a through hole 322, and the through hole 322 is sleeved on the connecting shaft 31 and is in clearance fit with the connecting shaft 31. The limiting assembly 3 further comprises a locking block 35, the locking block 35 is in threaded connection with the connecting shaft 31, and the striking plate 32 is located between the annular positioning plate 313 and the locking block 35.

The striking plate 32 is disposed to be in clearance fit with the connecting shaft 31 through the through hole 322, so that the striking plate 32 can be easily assembled to the connecting shaft 31. The striking plate 32 is located between the annular positioning plate 313 and the locking block 35, and the striking plate 32 can be directly pressed on the annular positioning plate 313 through the locking block 35, so that the position of the striking plate 32 and the connecting shaft 31 is fixed. The whole structure can ensure the position accuracy of the striking plate 32 and simultaneously facilitate the installation and the disassembly of the striking plate 32. And because the collision plate 32 needs to be in contact with the anti-collision shock absorber 33, abrasion easily exists, the collision plate 32 can be conveniently replaced in the mode, and the maintenance cost required by the whole oil cylinder test device can be effectively reduced.

Fig. 5 is a top view of the striking plate provided in the embodiment of the present disclosure, and referring to fig. 5, it can be seen that the striking plate 32 has a symmetrical structure, and the striking plate 32 includes a first portion 32a and a second portion 32b which are rectangular parallelepiped, a surface of the first portion 32a with the largest area is perpendicular to a surface of the second portion 32b with the largest area, one end of the second portion 32b is connected to the surface of the first portion 32a with the largest area, and the surface of the second portion 32b with the largest area is parallel to the surface of the supporting stage 11. The through-hole 322 is located on the first portion 32a, and an axis of the through-hole 322 is perpendicular to the surface of the first portion 32a having the largest area.

The striking plate 32 includes a first portion 32a and a second portion 32b, which are rectangular parallelepiped, so as to facilitate the preparation and acquisition of the striking plate 32, and facilitate the connection and installation of the striking plate 32.

Alternatively, the width of the first portion 32a is larger than the width of the second portion 32b in a direction perpendicular to the through hole 322 and parallel to the surface of the first portion 32a where the area is largest. Contact of the striking plate 32 with the crash cushion 33 can be facilitated.

Illustratively, the second portion 32b has a rectangular mounting groove C, and four corners of the rectangular mounting groove C have coupling holes whose axes penetrate the second portion 32 b. The rectangular mounting slots C and attachment holes provided on the second portion 32b may be used to attach the second portion 32b to other movable structures. And the rectangular mounting groove C is added to facilitate the connection of connecting pieces such as bolts and the like.

In other implementations provided by the present disclosure, the striking plate 32 may also have other structures, for example, only one rectangular parallelepiped structure with the through hole 322, or the striking plate 32 is welded and fixed to the connecting shaft 31, which is not limited by the present disclosure.

Fig. 6 is a schematic structural diagram of a locking block provided in an embodiment of the present disclosure, and referring to fig. 6, it can be seen that the locking block 35 is annular, an inner circumferential wall of the locking block 35 has a thread, and a circumferential direction of an outer circumferential wall of the locking block 35 has four equally spaced planes.

The screw thread on the inner wall of the locking block 35 can cooperate with the connecting screw thread of the peripheral wall of the other end of the connecting shaft 31, so that the locking block 35 is connected and fixed with the connecting shaft 31, and the striking plate 32 is effectively pressed on the connecting shaft 31. Annular latch segment 35 then easily prepares and the cost is lower, and has four equidistant distribution's plane in the circumference of the periphery wall of latch segment 35, can realize quick location and the installation of latch segment 35, guarantees that the latch segment 35 that finally obtains also has certain supporting role to connecting axle 31 itself.

Illustratively, the limiting assembly 3 further comprises a pushing cylinder 36, one end of the pushing cylinder 36 is coaxially connected with one end of the connecting shaft 31, and the other end of the pushing cylinder 36 is coaxially connected with the pushing piston rod 211 of the pushing cylinder 21.

The push cylinder 36 can be used to extend the length of the push piston rod 211 of the push cylinder 21, and on the premise of not changing the model and state of the push cylinder 21, the length of the push piston rod 211 can be extended, so that the push cylinder 21 can be used to push the test piston rod 1001 of the test oil cylinder 100 with a larger length, and the universality of the oil cylinder test device is improved.

Fig. 7 is a schematic structural diagram of the pushing cylinder provided in the embodiment of the present disclosure, and referring to fig. 7, one end of the pushing cylinder 36 has an internal thread 361, and the internal thread 361 is engaged with a thread on the outer circumferential wall of the pushing piston rod 211. The other end of the pushing cylinder 36 can abut against the locking block 35.

It is possible to realize stable connection between the deriving and pushing piston rods 211 and also to facilitate pushing of the testing piston rod 1001 of the testing cylinder 100 connected to the connecting shaft 31.

Illustratively, the side wall of the pushing cylinder 36 has a pressing threaded hole 362, and the limiting assembly 3 may further include a pressing bolt 37, wherein the pressing bolt 37 is threadedly connected in the pressing threaded hole 362, and one end of the pressing bolt 37 abuts against the outer peripheral wall of the pushing piston rod 211. The increase of the pressing screw hole 362 and the pressing bolt 37 can reduce the possibility of mutual rotation between the pushing cylinder 36 and the pushing piston rod 211, so as to improve the connection stability between the pushing cylinder 36 and the pushing piston rod 211.

Fig. 8 is a side view of the cylinder testing apparatus provided in the embodiment of the present disclosure, and as can be seen from fig. 8, the supporting table 11 may include a supporting portion 111, a first mounting portion 112, and a second mounting portion 113, where the supporting portion 111 and the first mounting portion 112 are both rectangular parallelepiped, the second mounting portion 113 is a rectangular cylinder having a partition 113a in a middle portion, and a surface of the partition 113a is perpendicular to one end surface of the rectangular cylinder. The first mounting portion 112 and the second mounting portion 113 are both mounted on the support portion 111, and an end face of one end of the first mounting portion 112 has a strip-shaped groove 112a having both ends respectively communicating with two mutually parallel surfaces of the first mounting portion 112, and a partition plate 113a of the second mounting portion 113 is inserted into the strip-shaped groove 112 a.

The support table 11 with the above structure is relatively stable as a whole, the first mounting portion 112 and the second mounting portion 113 are not connected, and the manufacturing cost required for the whole support table 11 is relatively low. The absence of a connection between the first mounting portion 112 and the second mounting portion 113 also facilitates adjustment of the position of the structures mounted on the first mounting portion 112 and the second mounting portion 113, which can ensure the accuracy of the resulting structure.

It should be noted that the second mounting portion 113 is fixed to the supporting portion 111 by welding, and the first mounting portion 112 is detachably connected to the supporting portion 111. The supporting portion 111 is connected to a cylinder block of the push cylinder 21, the first mounting portion 112 is used to support the push piston rod 211, and the second mounting portion 113 is used to mount and support the crash cushion 33.

Referring to fig. 8, the support assembly 1 may further include an L-shaped positioning pad 12, and an inner surface of the L-shaped positioning pad 12 includes a first fitting portion 12a coinciding with a bottom surface of the first mounting portion 112 and a second fitting portion 12b coinciding with a side wall of the first mounting portion 112. It is possible to facilitate adjustment of the position of the second mounting portion 113 and to perform quick mounting of the second mounting portion 113.

Fig. 9 is a schematic structural diagram of a second mounting portion provided in an embodiment of the present disclosure, and referring to fig. 9, the second mounting portion 113 is a rectangular cylinder having a partition plate 113a in the middle, and a surface of the partition plate 113a is perpendicular to one end surface of the rectangular cylinder.

As can be seen from fig. 9, one surface of the second mounting portion 113 remote from the support portion 111 has a rectangular positioning groove 113b, and the crash cushion 33 is mounted in the rectangular positioning groove 113 b. The positioning and installation of the crash cushion 33 are facilitated.

Fig. 10 is a schematic structural diagram of an L-shaped positioning mat provided in the embodiment of the present disclosure, and referring to fig. 10, the structure of the L-shaped positioning mat 12 can be seen.

Illustratively, the oil cylinder test device further comprises a guide assembly 4, wherein the guide assembly 4 comprises a slide rail 42 and a slide block 41, the slide rail 42 is connected with the support platform 11, the slide block 41 is slidably arranged on the slide rail 42, and the slide block 41 is connected with the striking plate 32.

The slide rail 42 can provide good supporting and guiding effects for the slider 41 and the striking plate 32, so as to further avoid the situation that the test piston rod 1001 of the test cylinder 100 is deviated in the moving process, and improve the accuracy of the stroke parameter of the test piston rod 1001.

Alternatively, the connection between the slider 41 and the striking plate 32 may be by a bolt, which may be inserted in the connecting hole. The connection between the two is convenient to realize.

Illustratively, two side walls of the slide rail 42 are provided with guide grooves 421 extending along the length direction of the slide rail 42, the slider 41 is provided with a groove 411, two side walls of the groove 411 are provided with guide protrusions 412 respectively corresponding to the two guide grooves 421, and the guide protrusions 412 are positioned in the guide grooves 421.

The slide rail 42 and the slide block 41 adopt the above structure, so that on one hand, the required preparation cost is low, and on the other hand, the slide rail 42 and the slide block 41 can also effectively play a role in guiding.

It should be noted that the guide member 4 may be mounted on the first mounting portion 112. The crash cushion 33 is mounted on the second mounting portion 113.

Fig. 11 is a schematic structural diagram of a slide rail provided in the embodiment of the present disclosure, fig. 12 is a schematic structural diagram of a slider 41 provided in the embodiment of the present disclosure, and referring to fig. 11 and 12, the structures of the slide rail 42 and the slider 41 can be seen. The surface of the slider 41 has a hole structure that fits the coupling hole of the striking plate 32, and will not be described in detail here.

In the implementation provided in the present disclosure, the surface of the support base 11 is a surface of the support base 11 for supporting the cylinder seat of the push cylinder 21.

Fig. 13 is a flowchart of a cylinder testing method provided in the embodiment of the present disclosure, and it can be known with reference to fig. 13 that the embodiment of the present disclosure provides a cylinder testing method, where the cylinder testing method is implemented by using the cylinder testing apparatus as described above, and the cylinder testing method includes:

s101: a test cylinder and an accumulator communicated with the test cylinder are provided.

The test oil cylinder and the energy accumulator can ensure the stable and normal work of the test oil cylinder, and ensure the normal realization of the functions of pushing out and recovering the test piston rod of the test oil cylinder.

It should be noted that a stop valve is arranged between the test oil cylinder and the energy accumulator to control the circulation of oil between the test oil cylinder and the energy accumulator.

In other implementations provided by the present disclosure, the accumulator may also be provided as a pump and tank arrangement. The present disclosure is not so limited.

S102: and placing the test oil cylinder on the support table.

The connection between the test oil cylinder and the support platform can be completed through structures such as a connecting plate and a bolt connecting piece.

S103: and connecting the connecting shaft with a piston rod of the test oil cylinder through the test oil cylinder connecting thread of the connecting shaft.

S104: the pushing cylinder pushes the connecting shaft to completely press the testing piston rod of the testing oil cylinder into the cylinder seat of the testing oil cylinder.

It should be noted that before the pushing cylinder pushes the connecting shaft, the testing piston rod of the testing oil cylinder is in the maximum extending state.

S105: and closing a communication channel between the test oil cylinder and the energy accumulator.

So as to control the position of the testing piston rod in the testing oil cylinder to be unchanged.

S106: and disassembling the connecting shaft and pushing the piston rod.

S107: the pushing piston rod of the pushing cylinder is fully retracted.

S108: and opening a communication channel between the test oil cylinder and the energy accumulator to enable the test piston rod to pop up until the collision plate is attached to the stop block.

S109: and acquiring the time length of the test piston rod extending out of the cylinder seat of the test oil cylinder until the collision plate is attached to the stop block.

The time length can be manually positioned by a person, and can also be measured by a sensor, for example, the sensor records the time at the moment when the test piston rod begins to extend and the time at the moment when the collision plate is attached to the stop block, and the time difference between the two is the movement time length of the test oil cylinder.

S110: and acquiring the maximum stroke of the test piston rod after the test piston rod extends out of the cylinder seat of the test oil cylinder.

The measurement of the maximum travel can be measured by a sensor or a distance measurer.

Optionally, before obtaining the maximum stroke after the test piston rod extends out of the cylinder seat of the test cylinder, the cylinder testing method may further include:

checking whether a gap exists between the first limiting surface of the collision plate and the second limiting surface of the stop block by using a feeler gauge; if a gap exists between the first limit surface of the collision plate and the second limit surface of the stop block, the collision plate is adjusted until the first limit surface of the collision plate is superposed with the second limit surface of the stop block.

The checking of the clearance may further correct the position of the tested piston rod to improve the accuracy of the resulting maximum stroke of the tested piston rod.

Technical effects of the cylinder testing method described in fig. 13 can refer to technical effects of the cylinder testing apparatus shown in fig. 1, and thus, detailed descriptions thereof are omitted.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.