Hydraulic cylinder sealing performance test device

Abstract

The present application discloses a hydraulic cylinder sealing performance testing device, which belongs to the technical field of hydraulic cylinder testing. It includes a housing; a positioning mechanism, which is arranged in the housing and is used to position the hydraulic cylinder to be tested; a testing mechanism, which is arranged on one side of the housing and is used to detect the sealing performance of the hydraulic cylinder to be tested positioned by the positioning mechanism; wherein the positioning mechanism includes: a positioning cylinder, which is used to place the hydraulic cylinder to be tested; a positioning plate assembly, which is provided in multiple numbers, and the multiple positioning plate assemblies are all arranged in the positioning cylinder, and in the working state, the multiple positioning plate assemblies are used to position the hydraulic cylinder placed in the positioning cylinder. The present application automatically positions and disassembles the hydraulic cylinder through the positioning cylinder and the multiple positioning plate assemblies, thereby solving the problem that the installation and disassembly of the hydraulic cylinder before and after the test usually rely on manual work, resulting in a more troublesome test operation, thereby achieving the technical effect of facilitating the positioning, installation and disassembly of the cylinder to be tested.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic cylinder testing, and more specifically, to a hydraulic cylinder sealing performance testing device. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator composed of a piston, a cylinder body, a sealing element, etc. It uses oil pressure to convert into force to push or pull the load; therefore, the sealing performance of the hydraulic cylinder is directly related to the service life and working efficiency of the equipment; the principle of the hydraulic cylinder sealing test is to apply a certain pressure and sealing medium to detect the leakage and working pressure of the hydraulic cylinder, so as to judge the sealing performance.

[0003] When testing the sealing performance of a traditional hydraulic cylinder, the cylinder to be tested needs to be assembled on the test station of the test equipment. When assembling the cylinder to be tested, its two ends need to be positioned and then connected to the pressure-applying end of the test equipment. Finally, pressure is applied to the sealing medium inside the cylinder to be tested through the pressure-applying end to achieve sealing performance testing. However, the installation and disassembly of the hydraulic cylinder before and after the test are usually done manually, and it is impossible to automatically position, connect and disassemble the cylinder to be tested, which makes the test operation more cumbersome. Especially for the testing of cylinders with large mass and volume, the installation and disassembly of the cylinder is extremely inconvenient.

[0004] In view of this, we propose a hydraulic cylinder sealing performance testing device. Summary of the invention

[0005] The purpose of the present application is to provide a hydraulic cylinder sealing performance testing device, which solves the technical problem that the installation and disassembly of the hydraulic cylinder before and after the test are usually completed manually, and the cylinder to be tested cannot be automatically positioned, connected and disassembled, resulting in cumbersome testing operations, especially for the testing of cylinders with large mass and volume, and the installation and disassembly of the cylinder is extremely inconvenient, and achieves the technical effect of facilitating the positioning, installation and disassembly of the cylinder to be tested.

[0006] The present application provides a hydraulic cylinder sealing performance testing device, comprising:

[0007] It includes a housing for supporting and installing various structures and components; and a testing mechanism for detecting the sealing performance of the hydraulic cylinder to be tested, wherein the testing mechanism is arranged on one side of the housing, and further includes:

[0008] A positioning mechanism, disposed in the housing, for positioning the hydraulic cylinder to be tested;

[0009] Wherein, the testing mechanism comprises a testing head and a linear module for pushing the testing head;

[0010] Wherein, the positioning mechanism comprises:

[0011] Positioning cylinder, used to place the hydraulic cylinder to be tested;

[0012] There are multiple positioning plate assemblies, and the multiple positioning plate assemblies are all arranged in the positioning cylinder. In the working state, the multiple positioning plate assemblies are driven to position and release the hydraulic cylinder placed in the positioning cylinder.

[0013] As an optional solution of the technical solution of the present application, a plurality of positioning grooves are provided on the inner side of the positioning tube corresponding to the positioning plate assembly;

[0014] The positioning plate assembly comprises:

[0015] A first positioning plate, slidably disposed in the corresponding positioning groove;

[0016] A second positioning plate is slidably disposed in the corresponding first positioning plate, a sliding pin is disposed on one side of the second positioning plate, a sliding groove is disposed on the first positioning plate corresponding to the sliding pin, and the sliding pin passes through the corresponding sliding groove;

[0017] A guide groove is provided on the inner side of the positioning groove corresponding to the sliding pin, and the sliding pin is slidably arranged in the corresponding guide groove.

[0018] As an optional solution of the technical solution of this application, it also includes:

[0019] A support rod is rotatably arranged inside the shell, and a limiting plate is fixed on one side of the support rod;

[0020] A rotating ring connected to the outer side of the positioning tube, wherein the rotating ring is rotatably arranged on the inner side of the housing;

[0021] A counterweight plate is connected to one side of the rotating ring.

[0022] As an optional solution of the technical solution of the present application, it also includes a second driving component for driving the positioning plate component to move;

[0023] The second driving assembly comprises:

[0024] A connecting rod, one end of which is connected to a side corresponding to the first positioning plate, and a plurality of the connecting rods are connected to the same connecting frame;

[0025] A positioning tooth groove is arranged on one side of one of the connecting rods;

[0026] The positioning gear is arranged between the plurality of connecting rods, and the positioning gear is meshed with the positioning tooth grooves, so that when the positioning gear is driven, the connecting rods and the first positioning plate can be driven to move through the positioning tooth grooves.

[0027] As an optional solution of the technical solution of the present application, the second driving component further includes:

[0028] A connecting plate connected to one side of the positioning gear;

[0029] A counterweight block connected to one side of the connecting plate;

[0030] The pushing block is arranged on one side of the counterweight block, and when the pushing block is driven, the connecting disk can be driven to rotate through the counterweight block.

[0031] As an optional solution of the technical solution of the present application, it also includes a pressure sensor arranged in the positioning tube; the hydraulic cylinder to be tested after positioning abuts against the pressure sensor.

[0032] As an optional solution of the technical solution of this application, it also includes:

[0033] A rotating frame is arranged on one side of the linear module, and the rotating frame is rotatably arranged on one side of the housing;

[0034] The first driving assembly is connected to one side of the rotating frame, and the first driving assembly drives the rotating frame to rotate relative to the housing.

[0035] As an optional solution of the technical solution of this application, it also includes:

[0036] A sliding frame, slidably passing through the rotating frame, wherein the test head is connected to one side of the sliding frame;

[0037] The impact device is arranged on one side of the housing through a device frame and is configured to drive the test head to perform an impact test on the hydraulic cylinder.

[0038] As an optional solution of the technical solution of the present application, a fixing seat is provided on one side of the shell, and the fixing seat is used to fix the oil pipe of the hydraulic cylinder to be tested.

[0039] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0040] (1) The present application adopts a positioning cylinder, and the positioning plate assembly provided in the positioning cylinder is used to automatically position and disassemble the hydraulic cylinder, thereby solving the problem that the installation and disassembly of the hydraulic cylinder before and after the test are usually completed manually, and the cylinder to be tested cannot be automatically positioned, connected and disassembled, resulting in cumbersome test operations. Especially for the test of cylinders with large mass and volume, the installation and disassembly of the cylinder is extremely inconvenient, thereby achieving the technical effect of facilitating the positioning, installation and disassembly of the cylinder to be tested.

[0041] (2) The present application sets a testing mechanism on the top of the shell, which can detect the pressure and impact on the hydraulic cylinder, and then detect the sealing performance of the hydraulic cylinder. The testing mechanism can rotate synchronously with the positioning tube to detect the sealing performance of the cylinder at multiple angles and when the oil pipe is twisted at a certain angle, thereby achieving the effect of detecting the sealing performance of the hydraulic cylinder.

[0042] (3) The present application arranges a counterweight block on the connecting plate. The gravity effect of the counterweight block and the counterweight plate can drive the positioning gear to rotate, thereby driving the positioning cylinder to automatically fall and reset after the detection is completed, and at the same time driving the four second positioning plates in the positioning cylinder back to the second positioning plates, thereby achieving the effect of automatically disassembling the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the overall structure of a hydraulic cylinder sealing performance testing device disclosed in one embodiment of the present application;

[0044] Figure 2 It is a structural schematic diagram of a positioning cylinder in a hydraulic oil cylinder sealing performance testing device disclosed in an embodiment of the present application;

[0045] Figure 3 It is a structural schematic diagram of a second driving assembly in a hydraulic cylinder sealing performance testing device disclosed in an embodiment of the present application;

[0046] Figure 4 It is a structural schematic diagram of a counterweight plate in a hydraulic cylinder sealing performance testing device disclosed in an embodiment of the present application;

[0047] Figure 5 for Figure 4 The enlarged structural diagram of the middle A part;

[0048] Figure 6 It is a structural schematic diagram of a second driving motor in a hydraulic cylinder sealing performance testing device disclosed in an embodiment of the present application;

[0049] Figure 7 It is a structural schematic diagram of a testing mechanism in a hydraulic cylinder sealing performance testing device disclosed in one embodiment of the present application;

[0050] Figure 8 It is a structural schematic diagram of a device frame in a hydraulic cylinder sealing performance testing device disclosed in one embodiment of the present application;

[0051] Fig. 9 for Figure 8 The enlarged structural diagram of the middle B part;

[0052] Fig.10 This is a schematic diagram of the internal structure of a hydraulic cylinder sealing performance testing device disclosed in one embodiment of the present application.

[0053] Explanation of reference numerals in the figure: 100, hydraulic cylinder; 1001, oil pipe;

[0054] 1. Shell; 11. Mounting frame; 12. Fixing seat; 13. Support rod;

[0055] 2. Test mechanism; 21. Test head; 22. Linear module; 23. Impact device; 24. Rotating frame; 25. Sliding frame; 26. First drive assembly; 261. Gear 1; 262. Gear 2; 263. First drive motor;

[0056] 3. Positioning mechanism; 31. Positioning cylinder; 311. Positioning groove; 312. Guide groove; 32. First positioning plate; 321. Slide groove; 322. Slide pin; 33. Second positioning plate; 34. Rotating ring; 341. Counterweight plate; 35. Pressure sensor;

[0057] 4. Second drive assembly; 41. Connecting rod; 411. Positioning tooth groove; 42. Connecting frame; 43. Positioning gear; 44. Connecting plate; 45. Counterweight block; 46. Pushing block; 47. Second drive motor. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] Reference below Figure 1-Figure 10 The hydraulic cylinder sealing performance testing device and its working principle recorded in the embodiment of the present application are described.

[0060] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present application discloses a hydraulic cylinder sealing performance testing device, including a shell 1, a support rod 13 is rotatably arranged on the inner side of the shell 1, and a limiting plate is arranged on one side of the support rod 13, so that the support rod 13 can only rotate toward one side; a testing mechanism 2 is arranged on the top of the shell 1, and the testing mechanism 2 is used to detect the sealing performance of the hydraulic cylinder 100, and a positioning mechanism 3 is arranged on the inner side of the shell 1, and the positioning mechanism 3 includes a positioning cylinder 31, and a second driving component 4 is arranged on one side of the positioning cylinder 31, and the second driving component 4 is used to drive the positioning cylinder 31 to automatically position, install and disassemble the hydraulic cylinder 100, wherein the positioning mechanism 3 also includes a plurality of positioning plate assemblies, and in a working state, the plurality of positioning plate assemblies can position the hydraulic cylinder 100 placed in the positioning cylinder 31.

[0061] Preferably, the positioning plate assembly includes a first positioning plate 32 , and a second positioning plate 33 is slidably provided on the inner side of the first positioning plate 32 . The second positioning plate 33 is driven by the second driving assembly 4 to position, install or disassemble the hydraulic cylinder 100 .

[0062] When the equipment is in use, first put the hydraulic cylinder 100 into the positioning cylinder 31, and drive the positioning cylinder 31 to rotate through the second driving component 4, and at the same time drive multiple second positioning plates 33 to position and install the hydraulic cylinder 100, and continue to drive the second driving component 4 to rotate the positioning cylinder 31, so that the positioning cylinder 31 rotates to the bottom of the testing mechanism 2, and the hydraulic cylinder 100 is tested through the testing mechanism 2. After the test is completed, continue to drive the second driving component 4 to rotate the positioning cylinder 31, so that the positioning cylinder 31 rotates to the top of the support rod 13, and then the positioning cylinder 31 automatically falls and resets under the effect of gravity, and automatically releases the fixation of the hydraulic cylinder 100, completing the disassembly effect.

[0063] In a specific example of the present application, four positioning plate assemblies are provided, corresponding to four first positioning plates 32 and four second positioning plates 33, and the four positioning plate assemblies can limit the hydraulic cylinder 100 placed in the positioning cylinder 31. It can be understood that the positioning plate assemblies can also be set to three or five or other reasonable numbers, as long as the hydraulic cylinder 100 placed in the positioning cylinder 31 can be limited. The present application does not limit the number of positioning plate assemblies. For the sake of convenience, the following description still uses four positioning plate assemblies to explain the specific solution.

[0064] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Four positioning grooves 311 are provided on the inner side of the positioning cylinder 31 corresponding to the positioning plate assembly, two guide grooves 312 are provided on the inner sides of the four positioning grooves 311, two slide grooves 321 are provided on the outer sides of the four first positioning plates 32, and sliding pins 322 are slidably provided on the inner sides of the plurality of slide grooves 321, and one end of the plurality of sliding pins 322 is respectively fixedly provided with the corresponding second positioning plates 33, a rotating ring 34 is fixedly provided on the outer side of the positioning groove 311, the rotating ring 34 is rotatably provided with the inner side of the outer shell 1, a counterweight plate 341 is fixedly provided on one side of the rotating ring 34, and a pressure sensor 35 is provided on the inner side of the positioning cylinder 31.

[0065] Corresponding to the positioning plate assembly, the second driving assembly 4 includes four connecting rods 41, and the four connecting rods 41 are respectively fixed to the corresponding first positioning plates 32, and the ends of the four connecting rods 41 are fixed to the connecting frame 42. A plurality of positioning tooth grooves 411 are arranged on the inner side of one of the connecting rods 41, and a positioning gear 43 is meshed on the inner side of the plurality of positioning tooth grooves 411, and a connecting disk 44 is fixedly arranged on the outer side of the positioning gear 43, and a counterweight block 45 is fixedly arranged on the outer side of the connecting disk 44, and a pushing block 46 is arranged on one side of the counterweight block 45, and the pushing block 46 drives the counterweight block 45 to rotate under the action of external force, and specifically, a second driving motor 47 is used to drive the pushing block 46 to rotate.

[0066] When the equipment is in use, the hydraulic cylinder 100 is installed in the positioning tube 31, the oil pipe 1001 is fixed, and the push block 46 is driven to rotate by the second drive motor 47, thereby driving the counterweight block 45 to rotate, so that the counterweight block 45 drives the connecting plate 44 to rotate, and the connecting plate 44 drives the positioning gear 43 to rotate, and the positioning gear 43 drives a connecting rod 41 to move through a plurality of positioning tooth grooves 411, and drives other connecting rods 41 to move together under the connection effect of the connecting frame 42, and the four connecting rods 41 drive the four first positioning plates 32 to move, so that the plurality of sliding pins 322 slide along the corresponding sliding grooves 321 under the guidance of the guide grooves 312, thereby driving the four second positioning plates 33 to move, so that the four second positioning plates 33 can position and fix the hydraulic cylinder 100;

[0067] Then the second drive motor 47 continues to rotate, driving the positioning cylinder 31 to rotate to the bottom of the test mechanism 2, so that the test mechanism 2 tests the hydraulic cylinder 100, and then the second drive component 4 continues to drive the positioning cylinder 31 to rotate, and performs tests at multiple angles. After the test is completed, the test mechanism 2 is rotated and reset, and the second drive component 4 continues to drive the positioning cylinder 31 to rotate to the top of the support rod 13, so that the support rod 13 falls and resets under the effect of gravity. At this time, the second drive motor 47 reverses for a distance, and the counterweight block 45 and the counterweight plate 341 drive the second positioning plate 33 and the positioning cylinder 31 to reset under the effect of gravity, so that the positioning cylinder 31 falls back on the support rod 13, wherein the pressure sensor 35 is used to detect the pressure applied to the hydraulic cylinder 100, thereby completing the testing process of the equipment.

[0068] Reference Figure 1 , Figure 7 , Figure 8 , Fig. 9 and Fig.10The test mechanism 2 includes a test head 21, which is arranged at the output end of the linear module 22. A rotating frame 24 is fixedly arranged on the outer side of the linear module 22. One side of the rotating frame 24 is rotatably arranged with the inner side of the housing 1. The rotating frame 24 drives the linear module 22 to rotate under the drive of the first driving component 26. The first driving component 26 includes a gear 1 261. A gear 2 262 is meshedly arranged on the outer side of the gear 1 261. One side of the gear 1 261 is fixedly arranged with the inner side of the rotating frame 24. The gear 2 262 rotates under the drive of an external force. Specifically, the first driving motor 263 is used to drive the gear 2 262 to rotate.

[0069] In the above technical scheme, the linear module 22 can drive the test head 21 to move toward the position of the hydraulic cylinder 100 to reflect the sealing performance of the hydraulic cylinder 100 through the change of the pressure value of the pressure sensor 35, wherein the function of the linear module 22 is to drive the test head 21 to move a certain distance and then maintain a relatively constant pressure on the top of the hydraulic cylinder 100. Therefore, in the actual working process, the linear module 22 can select components with controllable linear output functions such as hydraulic rods, electric push rods or pneumatic push rods. The specific structure of the linear module 22 is not limited in this application.

[0070] A sliding frame 25 is fixedly provided on the outer side of the test head 21, and the sliding frame 25 is slidably provided on the inner side of the rotating frame 24. An impact device 23 is provided on the top of the device frame 11, and the impact device 23 is provided on the top of the outer shell 1 through the device frame 11. The device frame 11 and the outer side of the outer shell 1 are fixedly provided. The impact device 23 is used to drive the test head 21 to perform an impact test on the hydraulic cylinder 100. A fixed seat 12 is fixedly provided on the outer side of the device frame 11, and the fixed seat 12 is used to fix the oil pipe 1001.

[0071] After the hydraulic cylinder 100 is installed into the positioning cylinder 31, the oil pipe 1001 is fixed to the fixing seat 12. When the positioning cylinder 31 is rotated to the bottom of the test head 21, the linear module 22 drives the test head 21 to descend, and the hydraulic cylinder 100 is pressure tested. Then, the first drive motor 263 drives the gear 2 262 to rotate, thereby driving the gear 1 261 to rotate, so that the gear 1 261 drives the rotating frame 24, the linear module 22 and the test head 21 to rotate synchronously with the positioning cylinder 31, and the positioning cylinder 31 is tested for performance at different angles, and the sealing performance of the hydraulic cylinder 100 after the oil pipe 1001 is twisted can be tested. After the pressure test is completed, the positioning cylinder 31 is rotated again to the bottom of the test head 21, and the impact device 23 impacts the sliding frame 25, so that the sliding frame 25 drives the test head 21 to perform an impact test on the hydraulic cylinder 100, and the equipment tests the sealing performance of the hydraulic cylinder 100.

[0072] In the above technical solution, in order to reduce the impact of the impact device 23 on the linear module 22 during the impact on the test head 21, in the specific example of the present application, the test head 21 is not directly connected to the linear module 22. It is only necessary to drive the test head 21 to contact the end face of the hydraulic cylinder 100 when the output end of the linear module 22 moves toward the test head 21.

[0073] In summary, when the hydraulic cylinder sealing performance test device disclosed in the embodiment of the present application is used, after the hydraulic cylinder 100 is installed into the positioning cylinder 31, the oil pipe 1001 is fixed to the fixing seat 12, and the second drive motor 47 is firstly Fig.10 The push block 46 rotates in the direction indicated by the middle arrow, and the second drive motor 47 drives the push block 46 to rotate, thereby driving the counterweight block 45 to rotate, so that the counterweight block 45 drives the connecting plate 44 to rotate, and the connecting plate 44 drives the positioning gear 43 to rotate. The positioning gear 43 drives a connecting rod 41 to move through multiple positioning tooth grooves 411, and under the connection effect of the connecting frame 42, drives other connecting rods 41 to move together. The four connecting rods 41 drive the four first positioning plates 32 to move, so that the multiple sliding pins 322 slide along the corresponding sliding grooves 321 under the guidance of the guide grooves 312, thereby driving the four second positioning plates 33 to move, so that the four second positioning plates 33 can position and fix the hydraulic cylinder 100.

[0074] At this time, the second drive motor 47 continues to rotate. Since the positioning plate assembly has restricted the hydraulic cylinder 100, that is, the rotation of the positioning gear 43 cannot drive the connecting rod 41 to move. At this time, the second drive motor 47 drives the positioning cylinder 31 to rotate until the positioning cylinder 31 drives the hydraulic cylinder 100 therein to rotate to the bottom of the testing mechanism 2, so that the linear module 22 drives the test head 21 to descend and perform a pressure test on the hydraulic cylinder 100.

[0075] Then, the second drive assembly 4 continues to drive the positioning cylinder 31 to rotate, and the first drive motor 263 drives the gear 2 262 to rotate, thereby driving the gear 1 261 to rotate, so that the gear 1 261 drives the rotating frame 24, the linear module 22 and the test head 21 to rotate synchronously with the positioning cylinder 31. In this working mode, the performance of the positioning cylinder 31 can be tested at different angles, and the sealing of the positioning cylinder 31 can be tested after the oil pipe 1001 is twisted.

[0076] After the pressure test is completed, the positioning cylinder 31 is rotated again to the bottom of the test head 21, so that the impact device 23 impacts the sliding frame 25, and the sliding frame 25 drives the test head 21 to perform an impact test on the hydraulic cylinder 100. By running the above process, the sealing performance test of the hydraulic cylinder 100 can be performed at multiple angles.

[0077] After conducting multi-angle tests, the test mechanism 2 is rotated and reset, and the second drive assembly 4 continues to drive the positioning cylinder 31 to rotate above the support rod 13, so that the support rod 13 falls and resets under the effect of gravity. At this time, the second drive motor 47 reverses for a distance, and the counterweight block 45 and the counterweight plate 341 drive the second positioning plate 33 and the positioning cylinder 31 to reset under the effect of gravity, so that the positioning cylinder 31 falls back on the support rod 13, completing the equipment test of the sealing performance of the hydraulic cylinder 100.

[0078] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A hydraulic cylinder sealing performance testing device, comprising a housing (1) for supporting and installing various structures and components; and a testing mechanism (2) for detecting the sealing performance of the hydraulic cylinder to be tested, wherein: The testing mechanism (2) is arranged on one side of the housing (1), and is characterized by further comprising: A positioning mechanism (3) is arranged in the housing (1) and is used for positioning the hydraulic cylinder (100) to be tested; Wherein, the testing mechanism (2) comprises a testing head (21) and a linear module (22) for pushing the testing head (21); Wherein, the positioning mechanism (3) comprises: A positioning cylinder (31) for placing the hydraulic cylinder (100) to be tested; A plurality of positioning plate assemblies are provided, and the plurality of positioning plate assemblies are all provided in the positioning cylinder (31); in a working state, the plurality of positioning plate assemblies are driven to position and release a hydraulic cylinder (100) placed in the positioning cylinder (31); the positioning plate assemblies are driven by a second driving assembly (4); a plurality of positioning grooves (311) are provided on the inner side of the positioning cylinder (31) corresponding to the positioning plate assemblies; Wherein, the positioning plate assembly comprises: A first positioning plate (32) slidably disposed in the corresponding positioning groove (311); A second positioning plate (33) is slidably arranged in the first positioning plate (32), a sliding pin (322) is arranged on one side of the second positioning plate (33), a sliding groove (321) is arranged on the first positioning plate (32) corresponding to the sliding pin (322), and the sliding pin (322) is arranged through the corresponding sliding groove (321); A guide groove (312) is provided on the inner side of the positioning groove (311) corresponding to the sliding pin (322), and the sliding pin (322) is slidably arranged in the corresponding guide groove (312); Wherein, the second driving component (4) comprises: A connecting rod (41), one end of which is connected to a side corresponding to the first positioning plate (32), and a plurality of the connecting rods (41) are connected to the same connecting frame (42); A positioning tooth groove (411) is arranged on one side of one of the connecting rods (41); The positioning gear (43) is disposed between the plurality of connecting rods (41), and the positioning gear (43) is meshed with the positioning tooth groove (411), so that when the positioning gear (43) is driven, the connecting rods (41) and the first positioning plate (32) can be driven to move via the positioning tooth groove (411).

2. The hydraulic cylinder sealing performance testing device according to claim 1, characterized in that: Also includes: A support rod (13) is rotatably arranged inside the housing (1), and a limiting plate is fixed to one side of the support rod (13); A rotating ring (34) connected to the outside of the positioning tube (31), the rotating ring (34) being rotatably disposed on the inside of the housing (1); A counterweight plate (341) is connected to one side of the rotating ring (34).

3. The hydraulic cylinder sealing performance testing device according to claim 1, characterized in that: The second driving component (4) further comprises: A connecting plate (44) connected to one side of the positioning gear (43); A counterweight block (45) connected to one side of the connecting plate (44); The pushing block (46) is arranged on one side of the counterweight block (45), and when the pushing block (46) is driven, it can drive the connecting plate (44) to rotate through the counterweight block (45).

4. The hydraulic cylinder sealing performance testing device according to claim 1, characterized in that: It also includes a pressure sensor (35) disposed in the positioning cylinder (31); after being positioned, the hydraulic oil cylinder (100) to be tested abuts against the pressure sensor (35).

5. The hydraulic cylinder sealing performance testing device according to claim 1, characterized in that: Also includes: A rotating frame (24) is arranged on one side of the linear module (22), and the rotating frame (24) is rotatably arranged on one side of the housing (1); A first driving component (26) is connected to one side of the rotating frame (24), and the first driving component (26) drives the rotating frame (24) to rotate relative to the housing (1).

6. The hydraulic cylinder sealing performance testing device according to claim 5, characterized in that: Also includes: A sliding frame (25) is arranged to slide through the rotating frame (24), and the test head (21) is connected to one side of the sliding frame (25); The impact device (23) is arranged on one side of the housing (1) via a device frame (11), and is configured to drive the test head (21) to perform an impact test on the hydraulic cylinder (100).

7. The hydraulic cylinder sealing performance testing device according to any one of claims 1 to 6, characterized in that: A fixing seat (12) is provided on one side of the housing (1), and the fixing seat (12) is used to fix the oil pipe (1001) of the hydraulic cylinder (100) to be tested.

Images