Hydraulic oil cylinder pressure test device

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder pressure testing device which comprises supporting legs and a workbench, the workbench is arranged at the upper ends of the supporting legs, a control box is arranged on one side of the workbench, a pressure testing assembly is arranged at one end of the workbench, a pushing mechanism is arranged on the workbench, an I-shaped plate is arranged in the pushing mechanism, and a sliding sleeve is arranged on the I-shaped plate. A sliding sleeve is arranged on the workbench, a connecting rod is arranged on the sliding sleeve, a threaded sleeve is arranged in the middle of the connecting rod, a limiting block is arranged on the workbench, a servo motor is arranged on one side of the limiting block, a first threaded rod is fixedly installed at the output end of the servo motor through a coupler, and a clamping mechanism is arranged on the workbench and clamps and limits the hydraulic oil cylinder body. And a second threaded rod and a third threaded rod can be driven to rotate by rotating a first rotating disc and a second rotating disc, so that a first clamping ring and a second clamping ring are driven by the second threaded rod and the third threaded rod through a first bearing and a second bearing to clamp and limit the hydraulic oil cylinder body, and the stability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder pressure testing device. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement, thus finding wide application in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cushioning and venting devices are optional depending on the specific application, while the other devices are essential.

[0003] In response, Chinese patent application number CN118188655B discloses a hydraulic cylinder pressure testing device. This invention relates to the field of hydraulic cylinder testing technology. The device includes a base plate, a processing table fixedly mounted on the top of the base plate, and a testing mechanism for pressure testing hydraulic cylinders mounted on the processing table. Symmetrically sliding placement seats for holding the hydraulic cylinders to be tested are mounted on the processing table, and limit plates are slidably mounted on the placement seats. This hydraulic cylinder pressure testing device, through the cooperation between the placement seats and the drive mechanism, allows the drive mechanism to move the placement seats towards the interior of the processing table, causing the two placement seats to simultaneously approach each other, clamping and fixing the outer surface of the hydraulic cylinder. Simultaneously, the cooperation between rollers and the limit plates further limits the movement of the hydraulic cylinder. Furthermore, during the movement of the limit plates driven by the rollers, the position of the hydraulic cylinder's oil inlet can be adjusted to ensure it is vertically upward, eliminating the need for manual adjustment.

[0004] However, when using this hydraulic cylinder pressure testing device, since the hydraulic cylinder is an independent unit, while in existing devices the hydraulic cylinder is placed in a box, the box cannot effectively limit and support the hydraulic cylinder, which may cause the hydraulic cylinder inside to shift during the pressure test, thus affecting the pressure test results.

[0005] Therefore, in order to solve the above problems, a hydraulic cylinder pressure testing device is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a hydraulic cylinder pressure testing device to solve the problem mentioned in the background art that, when using a hydraulic cylinder pressure testing device, since the hydraulic cylinder is an independent unit, while in existing devices the hydraulic cylinder is placed in a box, the box cannot effectively limit and support the hydraulic cylinder, which may cause the hydraulic cylinder to shift during the pressure test, thus affecting the pressure test results.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic cylinder pressure testing device, comprising: a support leg and a worktable, the upper end of the support leg being provided with the worktable, a control box being provided on one side of the worktable, and a pressure testing component being provided at one end of the worktable, a pushing mechanism being provided on the worktable, an I-shaped plate being provided inside the pushing mechanism, a sliding sleeve being provided on the I-shaped plate, a connecting rod being provided on the sliding sleeve, a threaded sleeve being provided in the middle of the connecting rod, and a limiting block being provided on the worktable, a servo motor being provided on one side of the limiting block, a first threaded rod being fixedly installed at the output end of the servo motor via a coupling, and a clamping mechanism being provided on the worktable, a support plate being provided inside the clamping mechanism, a placement plate being provided on the support plate, a hydraulic cylinder body being provided on the placement plate, a first limiting sleeve being provided on one side of the support plate, a first turntable being provided on one side of the first limiting sleeve, a second threaded rod being provided on one side of the first turntable, and a first limiting bolt being provided at the upper end of the first limiting sleeve, and a first bearing being provided at one end of the second threaded rod. The first bearing is provided with a first clamping ring, and a second limiting sleeve is provided on the other side of the support plate. A second turntable is provided on one side of the second limiting sleeve, and a third threaded rod is provided on one side of the second turntable. A pushing mechanism can be used to push the hydraulic cylinder body into the pressure testing assembly. This process can be achieved by a servo motor driving the first threaded rod to rotate, which in turn drives the threaded sleeve to move, thereby driving the connecting rod to work. The connecting rod then drives the sliding sleeve to slide on the I-plate, thereby moving the upper hydraulic cylinder body. Before this operation, the hydraulic cylinder body can be clamped and limited by a clamping mechanism. By rotating the first and second turntables, the second and third threaded rods can be driven to rotate, thereby driving the first and second clamping rings through the first and second bearings to clamp and limit the hydraulic cylinder body. This process can be achieved by using the first and second limiting bolts to limit and fix the second and third threaded rods.

[0008] Preferably, a second limiting bolt is movably installed on the upper end of the second limiting sleeve, and a second bearing is fixedly installed on one end of the third threaded rod. A second clamping ring is fixedly installed on the second bearing. The second limiting bolt can be used to limit and fix the second threaded rod.

[0009] Preferably, the pressure testing assembly includes a fixing block, which is fixedly installed on the workbench, and a bracket is fixedly installed on the fixing block. The bracket has a limit groove, and the fixing block can support and fix the bracket, while the bracket can support and fix the fixing plate.

[0010] Preferably, a fixing plate is fixedly installed on the upper end of the bracket, and a hydraulic rod is fixedly installed on the fixing plate. The output end of the hydraulic rod passes through the bracket, and a pressure head is detachably installed at the output end of the hydraulic rod. The hydraulic rod can drive the pressure head to perform the clamping work.

[0011] Preferably, a fixed sleeve is fixedly installed at the output end of the hydraulic rod, and limit rods are fixedly installed on both sides of the fixed sleeve. A slider is fixedly installed at one end of each limit rod, and the limit rod is slidably installed in a limit groove on the bracket via the slider. When the hydraulic rod is working, it can drive the fixed sleeve to move, and the fixed sleeve can drive the limit rods on both sides to move, and the limit rods on both sides can drive the slider to slide in the limit groove, thereby limiting the hydraulic rod.

[0012] Preferably, the I-shaped plate is fixedly installed on the workbench, the sliding sleeve is slidably installed on the I-shaped plate, both ends of the connecting rod are fixedly installed on the sliding sleeve, and the threaded sleeve is fixedly installed in the middle of the connecting rod. The I-shaped plate can support and limit the sliding sleeve, and the connecting rod can connect the sliding sleeve.

[0013] Preferably, the limiting block is fixedly installed on the worktable, the servo motor is fixedly installed on the worktable, the first threaded rod is threadedly connected to the threaded sleeve, and one end of the first threaded rod is rotatably installed on the limiting block. The limiting block can support the first threaded rod, and the threaded sleeve can be moved by the first threaded rod.

[0014] Preferably, the support plate is fixedly mounted on the sliding sleeve, the placement plate is fixedly mounted on the support plate, the hydraulic cylinder body is movably mounted inside the placement plate, the first limiting sleeve is fixedly mounted on the support plate, the first turntable is fixedly mounted on the second threaded rod, one end of the second threaded rod passes through the first limiting sleeve, and the first limiting bolt is movably mounted on the upper end of the first limiting sleeve. The support plate can support the placement plate, and the placement plate can support the hydraulic cylinder body during operation.

[0015] Preferably, the first bearing is fixedly installed at one end of the second threaded rod, the first clamping ring is fixedly installed on the first bearing, the second limiting sleeve is fixedly installed on the support plate, the second turntable is fixedly installed on the third threaded rod, one end of the third threaded rod passes through the second limiting sleeve, and one side of the first clamping ring and the second clamping ring are in contact with the hydraulic cylinder body. The first bearing and the second bearing can support the first clamping ring and the second clamping ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The pressure testing assembly of the present invention can perform pressure testing on the hydraulic cylinder. Compared with the existing structure, the present invention adopts a structure of hydraulic rod, pressure head, fixed sleeve, limiting rod, slider, etc. The pressure head can be driven by the hydraulic rod to work. In this process, the fixed sleeve can be moved by the hydraulic rod. The slider can be moved in the limiting groove by the limiting rods on both sides of the fixed sleeve, thereby limiting the hydraulic rod. The simple structure prevents the hydraulic rod from deviating, thereby improving the working efficiency of the device.

[0017] The invention is equipped with a pushing mechanism that can push the hydraulic cylinder body. Compared with the existing structure, the present invention uses a servo motor to drive the first threaded rod to rotate. The first threaded rod drives the connecting rod through the threaded sleeve, which in turn moves the sliding sleeve on the I-plate, thereby moving the upper hydraulic cylinder body. This structure is simple and not easily damaged, thus improving the working efficiency of the device.

[0018] The invention is equipped with a clamping mechanism that limits the movement of the hydraulic cylinder body. Compared to existing structures, this invention uses a first and second turntable on the support plate to drive a second and third threaded rod, thereby limiting the movement of the hydraulic cylinder body by the first and second clamping rings. This process can be achieved by limiting the movement of the second and third threaded rods with the first and second limiting bolts. This operation is simple and improves the stability of the device. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the structure of the device body of the present invention;

[0020] Figure 2 This is a front sectional view of the structure of the device body of the present invention;

[0021] Figure 3 This is a front view schematic diagram of the structure of the workbench body of the present invention;

[0022] Figure 4 This is a side view schematic diagram of the structure of the pushing mechanism body of the present invention;

[0023] Figure 5 This is a front view schematic diagram of the clamping mechanism of the present invention;

[0024] Figure 6 This is a side view of the structure of the support body of the present invention;

[0025] Figure 7 This is a schematic diagram of the pressure testing component of the present invention.

[0026] In the diagram: 1. Support leg; 2. Workbench; 3. Control box; 4. Pushing mechanism; 41. I-beam; 42. Sliding sleeve; 43. Connecting rod; 44. Threaded sleeve; 45. Limiting block; 46. Servo motor; 47. First threaded rod; 5. Clamping mechanism; 51. Support plate; 52. Placement plate; 53. Hydraulic cylinder body; 54. First limiting sleeve; 55. First turntable; 56. Second threaded rod; 57. First limiting bolt; 58. First bearing; 59. First clamping ring; 510. Second limiting sleeve; 511. Second turntable; 512. Third threaded rod; 513. Second limiting bolt; 514. Second bearing; 515. Second clamping ring; 6. Test pressure assembly; 61. Fixing block; 62. Bracket; 63. Limiting groove; 64. Fixing plate; 65. Hydraulic rod; 66. Pressure head; 67. Fixing sleeve; 68. Limiting rod; 69. Slider. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-7 One embodiment provided by the present invention:

[0029] The servo motor 46, hydraulic cylinder body 53 and hydraulic rod 65 used in this application are products that can be purchased directly from the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.

[0030] A hydraulic cylinder pressure testing device includes: a support leg 1 and a worktable 2. The worktable 2 is located on the upper end of the support leg 1. A control box 3 is located on one side of the worktable 2, and a pressure testing component 6 is located at one end of the worktable 2. A pushing mechanism 4 is provided on the worktable 2. An I-shaped plate 41 is provided inside the pushing mechanism 4. A sliding sleeve 42 is provided on the I-shaped plate 41. A connecting rod 43 is provided on the sliding sleeve 42. A threaded sleeve 44 is provided in the middle of the connecting rod 43. A limiting block 45 is provided on the worktable 2. A servo motor 46 is located on one side of the limiting block 45. The output end of the servo motor 46 is fixed by a coupling. The worktable 2 is equipped with a first threaded rod 47 and a clamping mechanism 5. The clamping mechanism 5 contains a support plate 51, on which a placement plate 52 is mounted. A hydraulic cylinder body 53 is mounted on the placement plate 52. A first limiting sleeve 54 is located on one side of the support plate 51, and a first turntable 55 is located on one side of the first limiting sleeve 54. A second threaded rod 56 is located on one side of the first turntable 55. A first limiting bolt 57 is located at the upper end of the first limiting sleeve 54. A first bearing 58 is located at one end of the second threaded rod 56, and a first clamping ring 59 is located on the first bearing 58. The worktable 2 is equipped with a first threaded rod 47 and a first clamping ring 59. The worktable 2 is equipped with a first threaded rod 47 and a first clamping bolt 57. On the other side, a second limiting sleeve 510 is provided. A second turntable 511 is provided on one side of the second limiting sleeve 510, and a third threaded rod 512 is provided on one side of the second turntable 511. By providing this component, the hydraulic cylinder body 53 can be clamped and limited by the clamping mechanism 5. The first turntable 55 and the second turntable 511 within the mechanism drive the second threaded rod 56 and the third threaded rod 512 to rotate respectively. The first bearing 58 and the second bearing 514 then drive the first clamping ring 59 and the second clamping ring 515 to clamp and limit the hydraulic cylinder body 53. The servo motor within the pushing mechanism 3 further contributes to this clamping and limiting action. 46 drives the first threaded rod 47 to rotate, which in turn drives the threaded sleeve 44 to move. The threaded sleeve 44 then drives the sliding sleeve 42 to move on the I-shaped plate 41 via the connecting rod 43, thereby pushing the hydraulic cylinder body 53 to the lower end of the test pressure assembly 6. The hydraulic rod 65 then drives the fixed sleeve 67 and the pressure head 66 to work. The fixed sleeve 67 then drives the slider 69 to slide in the limit groove 63 via the limit rod 68, thereby limiting the hydraulic rod 65. The pressure head 66 then performs the test pressure work on the hydraulic cylinder body 53, and the results are displayed in the control box 3.

[0031] As a further step of the present invention, a second limiting bolt 513 is movably installed on the upper end of the second limiting sleeve 510, and a second bearing 514 is fixedly installed on one end of the third threaded rod 512. A second clamping ring 515 is fixedly installed on the second bearing 514. By setting this component, the third threaded rod 512 can be limited by the second limiting bolt 513.

[0032] As a further step of the present invention, the pressure testing component 6 is provided with a fixing block 61, which is fixedly installed on the workbench 2, and a bracket 62 is fixedly installed on the fixing block 61. The bracket 62 has a limiting groove 63. By setting this component, the bracket 62 can be supported and fixed by the fixing block 61, and the fixing plate 64 can be supported and fixed by the bracket 62.

[0033] As a further step of the present invention, a fixing plate 64 is fixedly installed on the upper end of the bracket 62, and a hydraulic rod 65 is fixedly installed on the fixing plate 64. The output end of the hydraulic rod 65 passes through the bracket 62, and a pressure head 66 is detachably installed on the output end of the hydraulic rod 65. By setting this component, the fixing plate 64 can be supported and fixed by the bracket 62, and the hydraulic rod 65 can be supported and fixed by the fixing plate 64.

[0034] As a further step of the present invention, a fixed sleeve 67 is fixedly installed at the output end of the hydraulic rod 65. Limiting rods 68 are fixedly installed on both sides of the fixed sleeve 67. A slider 69 is fixedly installed at one end of the limiting rod 68, and the other end of the limiting rod 68 is slidably installed in the limiting groove 63 on the bracket 62 through the slider 69. By setting this component, the hydraulic rod 65 can drive the pressure head 66 to work, and the fixed sleeve 67 can be moved by the hydraulic rod 65.

[0035] As a further step of the present invention, the I-shaped plate 41 is fixedly installed on the workbench 2, the sliding sleeve 42 is slidably installed on the I-shaped plate 41, the two ends of the connecting rod 43 are fixedly installed on the sliding sleeve 42, and the threaded sleeve 44 is fixedly installed in the middle of the connecting rod 43. By setting this component, the sliding sleeve 42 can be supported by the I-shaped plate 41.

[0036] As a further step of the present invention, the limiting block 45 is fixedly installed on the workbench 2, the servo motor 46 is fixedly installed on the workbench 2, the first threaded rod 47 is threadedly connected to the threaded sleeve 44, and one end of the first threaded rod 47 is rotatably installed on the limiting block 45. By setting this component, the first threaded rod 46 can be supported and limited by the limiting block 45.

[0037] As a further step of the present invention, the support plate 51 is fixedly mounted on the sliding sleeve 42, the placement plate 52 is fixedly mounted on the support plate 51, the hydraulic cylinder body 53 is movably mounted inside the placement plate 52, the first limiting sleeve 54 is fixedly mounted on the support plate 51, the first turntable 55 is fixedly mounted on the second threaded rod 56, one end of the second threaded rod 56 passes through the first limiting sleeve 54, and the first limiting bolt 57 is movably mounted on the upper end of the first limiting sleeve 54. By setting this component, the first limiting sleeve 54 and the second limiting sleeve 510 can be supported and fixed by the support plate 51, and the second threaded rod 56 and the third threaded rod 512 can be rotated by the first turntable 55 and the second turntable 511.

[0038] As a further step of the present invention, a first bearing 58 is fixedly installed on one end of a second threaded rod 56, a first clamping ring 59 is fixedly installed on the first bearing 58, a second limiting sleeve 510 is fixedly installed on a support plate 51, and a second turntable 511 is fixedly installed on a third threaded rod 512. One end of the third threaded rod 512 passes through the second limiting sleeve 510, and one side of the first clamping ring 59 and the second clamping ring 515 is in contact with the hydraulic cylinder body 53. By setting this component, the first clamping ring 59 and the second clamping ring 515 can be supported and limited by the first bearing 58 and the second shaft 514, thereby supporting and limiting the hydraulic cylinder body 53 by the first clamping ring 59 and the second clamping ring 515.

[0039] Working principle: Before using the hydraulic cylinder pressure testing device, the device can be supported by the support leg 1. After powering the device with the existing power supply, it can be controlled by the control box 3. The clamping mechanism 5 clamps and limits the hydraulic cylinder body 53. The first turntable 55 and the second turntable 511 in the mechanism drive the second threaded rod 56 and the third threaded rod 512 to rotate respectively. The first bearing 58 and the second bearing 514 drive the first clamping ring 59 and the second clamping ring 515 to clamp and limit the hydraulic cylinder body 53. The servo motor 46 in the pushing mechanism 3 drives the first threaded rod 4... 7 rotates, and the first threaded rod 47 drives the threaded sleeve 44 to move. The threaded sleeve 44 then drives the sliding sleeve 42 to move on the I-shaped plate 41 via the connecting rod 43, thereby pushing the hydraulic cylinder body 53 to the lower end of the test pressure assembly 6. The hydraulic rod 65 then drives the fixed sleeve 67 and the pressure head 66 to work. The fixed sleeve 67 then drives the slider 69 to slide in the limit groove 63 via the limit rod 68, thereby limiting the hydraulic rod 65. The pressure head 66 then performs the test pressure work on the hydraulic cylinder body 53. The results are displayed on the control box 3, thus completing the work.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A hydraulic cylinder pressure testing device, comprising: Support leg (1) and workbench (2), the upper end of the support leg (1) is provided with workbench (2), the workbench (2) is provided with control box (3) on one side, and a pressure testing component (6) is provided at one end of the workbench (2). Its features are: The workbench (2) is provided with a pushing mechanism (4), the pushing mechanism (4) is provided with an I-plate (41), the I-plate (41) is provided with a sliding sleeve (42), the sliding sleeve (42) is provided with a connecting rod (43), the connecting rod (43) is provided with a threaded sleeve (44) in the middle, and a limiting block (45) is provided on the workbench (2). A servo motor (46) is provided on one side of the limiting block (45). The output end of the servo motor (46) is fixedly installed with a first threaded rod (47) through a coupling. The workbench (2) is provided with a clamping mechanism (5), the clamping mechanism (5) is provided with a support plate (51), the support plate (51) is provided with a placement plate (52), the placement plate (52) is provided with a support plate (51), the placement plate (52) is provided with a support plate (51), the support plate (51) is provided with a placement plate (52), the placement plate (52) is provided with a support plate (51), the support plate (51) is provided with a placement plate (52), the placement plate (52) is provided with a support plate (51), the support plate (51) is provided with a placement plate (52), the support plate (51) is provided with a placement plate (52), the support plate (51) is provided with a placement plate (52), the support plate (52) is provided with a support plate (51), the support plate (51) is provided with a placement plate (52), the support plate (52) is provided with a support plate (51), the support plate (51) is provided with a placement plate (52), the support plate (52) is provided with a support plate (51), the support plate (52) is provided with a placement plate (52), the support plate (52) is provided with a support plate (51), the support plate (52) is provided with a support plate (51), the support plate (52) is provided with 52) is provided with a hydraulic cylinder body (53), and a first limiting sleeve (54) is provided on one side of the support plate (51). A first turntable (55) is provided on one side of the first limiting sleeve (54). A second threaded rod (56) is provided on one side of the first turntable (55). A first limiting bolt (57) is provided at the upper end of the first limiting sleeve (54). A first bearing (58) is provided at one end of the second threaded rod (56). A first clamping ring (59) is provided on the first bearing (58). A second limiting sleeve (510) is provided on the other side of the support plate (51). A second turntable (511) is provided on one side of the second limiting sleeve (510). A third threaded rod (512) is provided on one side of the second turntable (511).

2. The hydraulic cylinder pressure testing device according to claim 1, characterized in that: The second limiting sleeve (510) is movably mounted with a second limiting bolt (513) at its upper end, and a second bearing (514) is fixedly mounted at one end of the third threaded rod (512), and a second clamping ring (515) is fixedly mounted on the second bearing (514).

3. The hydraulic cylinder pressure testing device according to claim 1, characterized in that: The pressure testing assembly (6) is provided with a fixing block (61), which is fixedly installed on the workbench (2), and a bracket (62) is fixedly installed on the fixing block (61), with a limit groove (63) provided on the bracket (62).

4. The hydraulic cylinder pressure testing device according to claim 3, characterized in that: A fixing plate (64) is fixedly installed on the upper end of the bracket (62), and a hydraulic rod (65) is fixedly installed on the fixing plate (64). The output end of the hydraulic rod (65) passes through the bracket (62), and a pressure head (66) is detachably installed on the output end of the hydraulic rod (65).

5. A hydraulic cylinder pressure testing device according to claim 4, characterized in that: The output end of the hydraulic rod (65) is fixedly fitted with a fixed sleeve (67), and limit rods (68) are fixedly fitted on both sides of the fixed sleeve (67). A slider (69) is fixedly fitted on one end of the limit rod (68), and the other end of the limit rod (68) is slidably fitted in the limit groove (63) on the bracket (62) through the slider (69).

6. The hydraulic cylinder pressure testing device according to claim 1, characterized in that: The I-shaped plate (41) is fixedly installed on the workbench (2), the sliding sleeve (42) is slidably installed on the I-shaped plate (41), the two ends of the connecting rod (43) are fixedly installed on the sliding sleeve (42), and the threaded sleeve (44) is fixedly installed in the middle of the connecting rod (43).

7. The hydraulic cylinder pressure testing device according to claim 1, characterized in that: The limiting block (45) is fixedly installed on the workbench (2), the servo motor (46) is fixedly installed on the workbench (2), the first threaded rod (47) is threadedly connected to the threaded sleeve (44), and one end of the first threaded rod (47) is rotatably installed on the limiting block (45).

8. The hydraulic cylinder pressure testing device according to claim 1, characterized in that: The support plate (51) is fixedly installed on the sliding sleeve (42), the placement plate (52) is fixedly installed on the support plate (51), the hydraulic cylinder body (53) is movably installed in the placement plate (52), the first limiting sleeve (54) is fixedly installed on the support plate (51), the first turntable (55) is fixedly installed on the second threaded rod (56), one end of the second threaded rod (56) passes through the first limiting sleeve (54), and the first limiting bolt (57) is movably installed on the upper end of the first limiting sleeve (54).

9. A hydraulic cylinder pressure testing device according to claim 1, characterized in that: The first bearing (58) is fixedly installed on one end of the second threaded rod (56), the first clamping ring (59) is fixedly installed on the first bearing (58), the second limiting sleeve (510) is fixedly installed on the support plate (51), the second turntable (511) is fixedly installed on the third threaded rod (512), one end of the third threaded rod (512) passes through the second limiting sleeve (510), and one side of the first clamping ring (59) and the second clamping ring (515) is in contact with the hydraulic cylinder body (53).

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