A hydraulic cylinder barrel sealing detection device and a method of using the same

Abstract

The application is suitable for the field of hydraulic cylinder detection, and provides a hydraulic cylinder body sealing detection equipment and a use method thereof, which comprises a bottom plate, a hydraulic cylinder arranged on the bottom plate, a supporting assembly arranged on the bottom plate and used for supporting the hydraulic cylinder, a first hydraulic rod, a movable end of the first hydraulic rod moving to one side, a moving plate fixed to the first hydraulic rod moving to one side, a blocking block fixed to the moving plate moving, the blocking block blocking a connecting pipe on one side so that the connecting pipe cannot exhaust and inhale, a double-head hydraulic rod, two piston rods of the double-head hydraulic rod moving close to each other, a moving strip connected to the piston rods moving, the moving strip being capable of moving linearly due to the installation of a sliding rod and a through sliding groove, the moving strip moving to move a clamping block below, the two clamping blocks moving close to each other to clamp the piston rod, and the blocking block and the clamping block being capable of quickly detecting the piston cylinder.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic cylinder testing, and particularly relates to a hydraulic cylinder body sealing testing device and its usage method. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, a speed reduction device can be eliminated, and there is no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] The seal of a hydraulic cylinder is a mechanism to prevent leakage of the working medium and to prevent external foreign objects such as air, dust and water from entering the hydraulic components and hydraulic system.

[0004] Common testing equipment for hydraulic cylinder sealing involves blocking the outlet end of the hydraulic cylinder and pushing or pulling the piston rod of the hydraulic rod to move it. The sealing performance of the hydraulic cylinder is judged by observing whether air is emitted from it. However, this testing method requires clamping the piston rod of the hydraulic rod and blocking the outlet end. Most common equipment uses manual operation for clamping and blocking, which greatly affects the testing speed of hydraulic cylinders. Summary of the Invention

[0005] This invention provides a hydraulic cylinder body sealing test device and its usage method, aiming to solve the problem of the single method for testing the airtightness of hydraulic cylinders.

[0006] This invention is implemented as follows: a hydraulic cylinder body sealing performance testing device, comprising:

[0007] The base plate has a hydraulic cylinder and a support assembly that supports the hydraulic cylinder, preventing it from moving back and forth. A pressing assembly is also installed on the base plate to fix the hydraulic cylinder to the placement block. A connecting pipe that communicates with the inside of the hydraulic cylinder is fixedly installed on one side of the hydraulic cylinder. A blocking assembly that abuts against the connecting pipe is installed on one of the placement blocks to block the connecting pipe, preventing the gas in the hydraulic cylinder from escaping from the connecting pipe.

[0008] A piston block is slidably connected inside the hydraulic cylinder. A piston rod is fixedly installed on one side of the piston block. The end of the piston rod away from the piston block extends out of the hydraulic cylinder. A push-pull assembly connected to the piston rod is installed on the base plate. A drive assembly is installed at the bottom of the base plate, and the drive assembly is connected to the pressing assembly, the blocking assembly, and the push-pull assembly.

[0009] Furthermore, the support assembly includes two placement blocks set on the base plate. One placement block is fixedly installed on the base plate, and a slide bar is fixedly installed on the base plate. The other placement block slides on the slide bar. The placement block has a groove for the slide bar to pass through. One placement block has a round hole, and a threaded rod that is threadedly connected to the other placement block is rotatably connected in the round hole. Multiple support legs are fixedly installed on the bottom of the base plate to support it.

[0010] Furthermore, the pressing assembly includes a second hydraulic rod fixedly mounted on the base plate. A pressing plate is fixedly mounted on the movable end of the second hydraulic rod. A circular hole is opened on the side of the pressing plate away from the second hydraulic rod. A short rod is slidably connected in the circular hole. A pressing plate that abuts against the hydraulic cylinder is fixedly mounted on one end of the short rod. A threaded hole is opened on the pressing plate. A threaded knob that abuts against the short rod is threadedly connected in the threaded hole.

[0011] Furthermore, the blocking assembly includes a first hydraulic rod fixedly mounted on the placement block, a movable plate fixedly mounted on the movable end of the first hydraulic rod, a rubber blocking block that mates with a connecting pipe fixedly mounted on the side of the movable plate away from the first hydraulic rod, and a circular hole provided on the movable plate, in which a limiting rod fixedly mounted to the placement block is slidably connected.

[0012] Furthermore, the push-pull assembly includes a fixed plate fixedly mounted on a base plate. A first threaded rod is provided on the fixed plate, with support plates rotatably connected to both ends of the first threaded rod. The support plates are fixedly mounted on the fixed plate. A push block sliding on the fixed plate is threadedly connected to the first threaded rod. A cylinder is fixedly mounted on the side of the push block away from the first threaded rod. A first clamping plate is provided on one side of the cylinder. A pressure sensor is fixedly mounted on one side of the first clamping plate. The cylinder and pressure sensor are fixedly mounted. A second clamping plate is provided on the side of the first clamping plate away from the pressure sensor. Multiple support columns are fixedly mounted between the first and second clamping plates. A through-slide groove is opened on the second clamping plate. A slide rod is fixedly mounted within the through-slide groove. Multiple moving strips slidably connected within the through-slide groove are sleeved on the slide rod. Two opposing locking blocks are engaged with the piston rod, and the locking blocks are fixedly mounted to the two moving strips respectively. A double-ended hydraulic rod is fixedly mounted on the second clamping plate. The moving strips are fixedly mounted to the movable end of the double-ended hydraulic rod on the side away from the locking blocks.

[0013] Furthermore, the drive assembly includes a servo motor fixedly mounted on the base plate, an incomplete gear fixedly mounted on the output shaft of the servo motor, a second support block rotatably connected to the side of the incomplete gear away from the servo motor, the second support block fixedly mounted on the base plate, gears that mate with the incomplete gear on both sides, a third support block fixedly mounted on the base plate, a cylinder rotatably connected to the third support block, one end of the cylinder fixedly mounted to one of the gears, and a toothed transmission belt installed between the other end of the cylinder and the shaft of the first threaded rod.

[0014] Furthermore, a second threaded rod is provided on one side of the servo motor, and multiple first support blocks are rotatably connected to the second threaded rod to support it. The first support blocks are fixedly installed on the base plate, and another gear is fixedly installed on the shaft of the second threaded rod. A piston cylinder is fixedly installed on the base plate, and a piston block is slidably connected inside the piston cylinder. A piston rod is fixedly installed on one side of the piston block, and the end of the piston rod away from the piston block extends to the outside of the piston cylinder and is fixedly installed with a push plate. The push plate is threadedly connected to the second threaded rod. A first liquid outlet pipe is fixedly installed on one side of the piston cylinder, and the end of the first liquid outlet pipe away from the piston cylinder is fixedly installed with a double-headed hydraulic rod. A second liquid outlet pipe is fixedly installed on one side of the piston cylinder, and the end of the second liquid outlet pipe away from the piston cylinder is fixedly installed with the first hydraulic rod. A third liquid outlet pipe is fixedly installed on the piston cylinder, and the end of the third liquid outlet pipe away from the piston cylinder is fixedly installed with the second hydraulic rod. Solenoid valves are fixedly installed on the first, second, and third liquid outlet pipes.

[0015] A method for testing the sealing performance of a hydraulic cylinder body using the testing equipment as claimed in the claims includes the following steps:

[0016] Step 1: Measure the length of the hydraulic cylinder to be tested, adjust the distance between the two placement blocks, and place the hydraulic rod between the two placement blocks;

[0017] Step 2: The pressing plate on the base plate moves downward, and the moving pressing plate presses against the hydraulic cylinder, so that the hydraulic cylinder is fixedly installed on the placement block;

[0018] Step 3: The rubber plug on one side moves, and the moved rubber plug blocks the connecting pipe, preventing air from coming out of the connecting pipe;

[0019] Step 4: The upper and lower locking blocks are brought together to fix one end of the piston rod and push it back and forth, thereby detecting the sealing performance of the cylinder through the pressure sensor.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The first hydraulic rod operates, and the movable end of the first hydraulic rod moves to one side. The movable end drives the movable plate fixed to it to move to one side. The movable plate drives the blocking block fixed on it to move. The moving blocking block blocks the connecting pipe on one side, preventing the connecting pipe from venting and venting air.

[0022] When the double-headed hydraulic rod operates, the piston rods on both sides of the double-headed hydraulic rod move closer to each other, driving the moving strip connected to them to move. Because of the installation of the sliding rod and the through-slide groove, the moving strip can move in a straight line. The moving moving strip drives the locking block below to move, so that the two locking blocks move closer to each other and clamp the piston rod. The piston cylinder can be quickly inspected through the blocking block and the locking block. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure provided by the present invention.

[0026] Figure 2 This is an enlarged structural schematic diagram of the hydraulic cylinder provided by the present invention.

[0027] Figure 3 This is a schematic diagram of the internal structure of the placement block provided by the present invention.

[0028] Figure 4 This is an enlarged schematic diagram of the double-headed hydraulic rod structure provided by the present invention.

[0029] Figure 5 This is an enlarged schematic diagram of the slide bar structure provided by the present invention.

[0030] Figure 6 This is a schematic diagram of the bottom structure of the base plate provided by the present invention.

[0031] Figure 7 This is a schematic diagram of the enlarged incomplete gear structure provided by the present invention.

[0032] Figure label:

[0033] 1. Base plate; 2. Support leg; 3. Placement block; 4. Threaded rod; 5. Sliding bar; 6. Fixing plate; 7. Hydraulic cylinder; 8. Connecting pipe; 9. Rubber plug; 10. Moving plate; 11. Limiting rod; 12. First hydraulic rod; 13. Second hydraulic rod; 14. Pressing plate; 15. Short rod; 16. Threaded knob; 17. Pressing plate; 18. Piston rod; 19. Pushing block; 20. First threaded rod; 21. Pressure sensor; 22. First clamping plate; 23. Second clamping plate 24. Support plate; 25. Toothed transmission belt; 26. First outlet pipe; 27. Second outlet pipe; 28. Snap-fit ​​block; 29. ​​Moving bar; 30. Double-headed hydraulic rod; 31. Slide rod; 32. Third outlet pipe; 33. Solenoid valve; 34. Piston cylinder; 35. Piston rod; 36. Push plate; 37. Second threaded rod; 38. First support block; 39. Gear; 40. Second support block; 41. Incomplete gear; 42. Servo motor; 43. Third support block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] To effectively illustrate the embodiments of the present invention, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] Please see Figure 1-7 This invention provides a hydraulic cylinder body sealing test device and its usage method to solve the problem of limited testing methods for hydraulic cylinder air tightness.

[0037] Please see Figure 1 The present invention provides a hydraulic cylinder body sealing performance testing device and its usage method, comprising:

[0038] A base plate 1 is provided with a hydraulic cylinder 7, and a support assembly for supporting the hydraulic cylinder 7 is installed on the base plate 1.

[0039] Please see Figure 1 , Figure 2 , Figure 3 The support assembly includes two placement blocks 3 disposed on the base plate 1. One of the placement blocks 3 is fixedly installed on the base plate 1, and a slide bar 5 is fixedly installed on the base plate 1. The other placement block 3 slides on the slide bar 5. The placement block 3 has a groove through which the slide bar 5 passes. One of the placement blocks 3 has a round hole, and a threaded rod 4 that is threadedly connected to the other placement block 3 is rotatably connected in the round hole. A plurality of support legs 2 are fixedly installed on the bottom of the base plate 1 to support it.

[0040] When the distance between the two placement blocks 3 needs to be adjusted, the threaded screw rod 4 is rotated. The rotating threaded screw rod 4 causes the placement blocks 3 sliding on the slide bar 5 on the other side to move closer or further apart. By adjusting, the hydraulic cylinder 7 to be tested can be placed on the placement block 3. The two hydraulic cylinders 7 placed on the two sides cannot move left or right by the placement blocks 3 on both sides. Of course, the slide bar 5 fixedly installed on the base plate 1 makes the back-and-forth movement of the placement blocks 3 more stable.

[0041] The support assembly prevents the hydraulic cylinder 7 from moving back and forth, and a pressing assembly is installed on the base plate 1.

[0042] Please see Figure 1 , Figure 2 The pressing assembly includes a second hydraulic rod 13 fixedly installed on the base plate 1. A pressing plate 14 is fixedly installed on the movable end of the second hydraulic rod 13. A circular hole is opened on the side of the pressing plate 14 away from the second hydraulic rod 13. A short rod 15 is slidably connected in the circular hole. A pressing plate 17 that abuts against the hydraulic cylinder 7 is fixedly installed on one end of the short rod 15. A threaded hole is opened on the pressing plate 14. A threaded knob 16 that abuts against the short rod 15 is threadedly connected in the threaded hole.

[0043] Specifically, when the second hydraulic rod 13 operates, its movable end moves downward, causing the fixed pressing plate 14 to move downward. The moving pressing plate 14 then causes the short rod 15 to move downward, and the short rod 15 pushes the lower pressing plate 17 against the hydraulic cylinder 7, making the hydraulic cylinder 7 more secure. Of course, the position of the short rod 15 can be adjusted according to the size of the hydraulic cylinder 7. When adjustment is needed, rotate the threaded knob 16. The rotated threaded knob 16 moves away from the short rod 15, allowing the short rod 15 to move. Rotate the threaded knob 16 in the opposite direction to make the threaded knob 16 press against the short rod 15.

[0044] A connecting pipe 8 communicating with the interior of the hydraulic cylinder 7 is fixedly installed on one side. A blocking component that abuts against the connecting pipe 8 is installed on one of the placement blocks 3. The connecting pipe 8 is blocked by the blocking component, so that the gas in the hydraulic cylinder 7 cannot be discharged from the connecting pipe 8.

[0045] Please see Figure 1 , Figure 2 The blocking assembly includes a first hydraulic rod 12 fixedly installed on the placement block 3. A movable plate 10 is fixedly installed on the movable end of the first hydraulic rod 12. A rubber blocking block 9 that cooperates with the connecting pipe 8 is fixedly installed on the side of the movable plate 10 away from the first hydraulic rod 12. A circular hole is opened on the movable plate 10, and a limiting rod 11 that is fixedly installed on the placement block 3 is slidably connected in the circular hole.

[0046] In detail, the first hydraulic rod 12 operates, and the movable end of the first hydraulic rod 12 moves to one side. The moving movable end drives the movable plate 10 fixed to it to move to one side. The moving movable plate 10 drives the blocking block 9 fixed on it to move. The moving blocking block 9 blocks the connecting pipe 8 on one side, preventing the connecting pipe 8 from venting and inletting air. When the movable plate 10 moves, the movable end of the first hydraulic rod 12 causes the movable plate 10 to flip. Therefore, the limiting rod 11 is needed to make the movable plate 10 move in a straight line.

[0047] A piston block is slidably connected inside the hydraulic cylinder 7. A piston rod 18 is fixedly installed on one side of the piston block. The end of the piston rod 18 away from the piston block extends to the outside of the hydraulic cylinder 7. A push-pull assembly connected to the piston rod 18 is installed on the base plate 1.

[0048] Please see Figure 1 , Figure 4 , Figure 5 The push-pull assembly includes a fixed plate 6 fixedly mounted on the base plate 1. A first threaded rod 20 is provided on the fixed plate 6. Support plates 24 are rotatably connected to both ends of the first threaded rod 20, providing support. The support plates 24 are fixedly mounted on the fixed plate 6. A push block 19, sliding on the fixed plate 6, is threadedly connected to the first threaded rod 20. A cylinder is fixedly mounted on the side of the push block 19 away from the first threaded rod 20. A first clamping plate 22 is provided on one side of the cylinder. A pressure sensor 21 is fixedly mounted on one side of the first clamping plate 22. The cylinder and the pressure sensor 21 are fixedly mounted. The first clamping plate 22 is located away from the first threaded rod 20. A second clamping plate 23 is provided on one side of the pressure sensor 21. Multiple support columns are fixedly installed between the first clamping plate 22 and the second clamping plate 23. A through-slide groove is provided on the second clamping plate 23. A slide rod 31 is fixedly installed in the through-slide groove. Multiple moving strips 29 are slidably connected to the slide rod 31 in the through-slide groove. Two oppositely arranged locking blocks 28 are engaged on the piston rod 18. The locking blocks 28 are fixedly installed on the two moving strips 29 respectively. A double-headed hydraulic rod 30 is fixedly installed on the second clamping plate 23. The side of the moving strip 29 away from the locking block 28 is fixedly installed with the movable end of the double-headed hydraulic rod 30.

[0049] The double-headed hydraulic rod 30 is set to operate. The piston rods on both sides of the double-headed hydraulic rod 30 move closer to each other, driving the moving strip 29 connected to it to move. Because of the installation of the slide rod 31 and the through slide groove, the moving strip 29 can move linearly. The moving strip 29 drives the lower locking block 28 to move, so that the two locking blocks 28 move closer to each other and clamp the piston rod 18. At this time, the piston rod 18 can be pushed or pulled to both sides smoothly. The first threaded rod 20 rotates. The rotating first threaded rod 20 drives the push block 19 connected to it to move to one side. The moving push block 19 pulls or pushes the piston rod 18 through the first clamping plate 22. Since the push block 19 is fixed to the pressure sensor 21 by the cylinder, the pulling and pushing force generated by the cylinder enables the pressure sensor 21 to detect the sealing of the hydraulic cylinder.

[0050] A drive assembly is installed at the bottom of the base plate 1, and the drive assembly is connected to the pressing assembly, the blocking assembly and the push-pull assembly.

[0051] Please see Figure 6 , Figure 7 The drive assembly includes a servo motor 42 fixedly mounted on the base plate 1. An incomplete gear 41 is fixedly mounted on the output shaft of the servo motor 42. A second support block 40 supporting the incomplete gear 41 is rotatably connected to the side of the incomplete gear 41 away from the servo motor 42. The second support block 40 is fixedly mounted on the base plate 1. Gears 39 that cooperate with the incomplete gear 41 are provided on both sides. A third support block 43 is fixedly mounted on the base plate 1. A cylinder is rotatably connected to the third support block 43. One end of the cylinder is fixedly mounted to one of the gears 39. A toothed transmission belt 25 is installed between the other end of the cylinder and the shaft of the first threaded rod 20.

[0052] Specifically, when the servo motor 42 operates, the output shaft of the servo motor 42 drives the incomplete gear 41 fixed on it to rotate. When the incomplete gear 41 rotates to mesh with the gear 39 on one side, the gear 39 rotates. The rotating gear 39 drives the cylinder to rotate. The rotating cylinder drives the first threaded rod 20 to rotate through the toothed transmission belt 25 installed on one side. The rotation of the incomplete gear 41 is made more stable by the fixed second support block 40, while the gear 39 and the toothed transmission belt 25 can operate normally by the fixed third support block 43 on one side.

[0053] Please see Figure 6 , Figure 7The servo motor 42 has a second threaded rod 37 on one side. Multiple first support blocks 38 are rotatably connected to the second threaded rod 37 to support it. The first support blocks 38 are fixedly mounted on the base plate 1. Another gear 39 is fixedly mounted on the shaft of the second threaded rod 37. A piston cylinder 34 is fixedly mounted on the base plate 1. A piston block is slidably connected inside the piston cylinder 34. A piston rod 35 is fixedly mounted on one side of the piston block. The end of the piston rod 35 away from the piston block extends outside the piston cylinder 34 and is fixedly mounted with a push plate 36. The push plate 36 is threadedly connected to the second threaded rod 37. A first liquid outlet pipe 26 is fixedly installed on one side of the piston cylinder 34. The end of the first liquid outlet pipe 26 away from the piston cylinder 34 is fixedly installed with the double-headed hydraulic rod 30. A second liquid outlet pipe 27 is fixedly installed on one side of the piston cylinder 34. The end of the second liquid outlet pipe 27 away from the piston cylinder 34 is fixedly installed with the first hydraulic rod 12. A third liquid outlet pipe 32 is fixedly installed on the piston cylinder 34. The end of the third liquid outlet pipe 32 away from the piston cylinder 34 is fixedly installed with the second hydraulic rod 13. Solenoid valves 33 are fixedly installed on the first liquid outlet pipe 26, the second liquid outlet pipe 27, and the third liquid outlet pipe 32.

[0054] In detail, when the incomplete gear 41 meshes with the gear 39 on the other side, it drives the gear 39 to rotate. The rotating gear 39 drives the second threaded rod 37 fixed to it to rotate. The rotating second threaded rod 37 drives the push plate 36 threaded to it to move to one side. The moving push plate 36 pushes the piston rod 35 fixed to it to move. The moving piston rod 35 drives the piston block in the piston cylinder 34 to move, and discharges the liquid in the piston cylinder 34 through the first outlet pipe 26, the second outlet pipe 27 and the third outlet pipe 32 into multiple hydraulic rods. The flow of liquid allows the multiple hydraulic rods to extend and retract. Of course, the solenoid valves 33 installed on each pipe allow the pipes to discharge liquid at different times.

[0055] A method for testing the sealing performance of a hydraulic cylinder body using the testing equipment as described in claim 7 includes the following steps:

[0056] Step 1: Measure the length of the hydraulic cylinder to be tested, adjust the distance between the two placement blocks 3, and place the hydraulic rod between the two placement blocks 3;

[0057] Step 2: The pressing plate 17 on the base plate 1 moves downward, and the moving pressing plate 17 abuts against the hydraulic cylinder 7, so that the hydraulic cylinder 7 is fixedly installed on the placement block 3;

[0058] Step 3: The rubber plug 9 on one side moves, and the moved rubber plug 9 blocks the connecting pipe 8, preventing air from coming out of the connecting pipe 8;

[0059] Step 4: The upper and lower locking blocks 28 move closer together to fix one end of the piston rod 18 and push it back and forth, thereby detecting the sealing performance of the cylinder through the pressure sensor 21.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic cylinder body sealing performance testing device, characterized in that, include: A base plate (1) is provided with a hydraulic cylinder (7). A support assembly is installed on the base plate (1) to support the hydraulic cylinder (7). The support assembly prevents the hydraulic cylinder (7) from moving back and forth. A pressing assembly is installed on the base plate (1). The pressing assembly fixes the hydraulic cylinder (7) on the placement block (3). A connecting pipe (8) communicating with the inside of the hydraulic cylinder (7) is fixedly installed on one side of the hydraulic cylinder (7). A blocking assembly that abuts against the connecting pipe (8) is installed on one of the placement blocks (3). The connecting pipe (8) is blocked by the blocking assembly, so that the gas in the hydraulic cylinder (7) cannot be discharged from the connecting pipe (8). A piston block is slidably connected inside the hydraulic cylinder (7). A first piston rod (18) is fixedly installed on one side of the piston block. The end of the first piston rod (18) away from the piston block extends to the outside of the hydraulic cylinder (7). A push-pull assembly connected to the first piston rod (18) is installed on the base plate (1). A drive assembly is installed at the bottom of the base plate (1), and the drive assembly is connected to the pressing assembly, the blocking assembly and the push-pull assembly. The push-pull assembly includes a fixed plate (6) fixedly mounted on the base plate (1). A first threaded rod (20) is provided on the fixed plate (6). Both ends of the first threaded rod (20) are rotatably connected to support plates (24) for support. The support plates (24) are fixedly mounted on the fixed plate (6). The first threaded rod (20) is threadedly connected to a push block (19) that slides on the fixed plate (6). A cylinder is fixedly mounted on the side of the push block (19) away from the first threaded rod (20). A first clamping plate (22) is provided on one side of the cylinder. A pressure sensor (21) is fixedly mounted on one side of the first clamping plate (22). The cylinder and the pressure sensor (21) are fixedly mounted. The first clamping plate (22) is located away from the... A second clamping plate (23) is provided on one side of the pressure sensor (21). Multiple support columns are fixedly installed between the first clamping plate (22) and the second clamping plate (23). A through groove is provided on the second clamping plate (23). A slide rod (31) is fixedly installed in the through groove. Multiple moving strips (29) are slidably connected in the through groove on the slide rod (31). Two oppositely arranged snap-fit ​​blocks (28) are snapped onto the first piston rod (18). The snap-fit ​​blocks (28) are fixedly installed on the two moving strips (29) respectively. A double-headed hydraulic rod (30) is fixedly installed on the second clamping plate (23). The side of the moving strip (29) away from the snap-fit ​​block (28) is fixedly installed with the movable end of the double-headed hydraulic rod (30).

2. The hydraulic cylinder body sealing testing equipment as described in claim 1, characterized in that, The support assembly includes two placement blocks (3) disposed on the base plate (1). One of the placement blocks (3) is fixedly installed on the base plate (1). A slide bar (5) is fixedly installed on the base plate (1). The other placement block (3) slides on the slide bar (5). A groove is provided on the placement block (3) for the slide bar (5) to pass through. A circular hole is provided on one of the placement blocks (3). A threaded rod (4) that is threadedly connected to the other placement block (3) is rotatably connected in the circular hole. A plurality of support legs (2) are fixedly installed on the bottom of the base plate (1) to support it.

3. The hydraulic cylinder body sealing testing equipment as described in claim 2, characterized in that, The pressing assembly includes a second hydraulic rod (13) fixedly installed on the base plate (1). A first pressing plate (14) is fixedly installed on the movable end of the second hydraulic rod (13). A circular hole is opened on the side of the first pressing plate (14) away from the second hydraulic rod (13). A short rod (15) is slidably connected in the circular hole. A second pressing plate (17) that abuts against the hydraulic cylinder (7) is fixedly installed on one end of the short rod (15). A threaded hole is opened on the first pressing plate (14). A threaded knob (16) that abuts against the short rod (15) is threadedly connected in the threaded hole.

4. The hydraulic cylinder body sealing testing equipment as described in claim 3, characterized in that, The blocking assembly includes a first hydraulic rod (12) fixedly mounted on the placement block (3), a movable plate (10) fixedly mounted on the movable end of the first hydraulic rod (12), a rubber blocking block (9) cooperating with the connecting pipe (8) fixedly mounted on the side of the movable plate (10) away from the first hydraulic rod (12), a circular hole is provided on the movable plate (10), and a limiting rod (11) fixedly mounted on the placement block (3) is slidably connected in the circular hole.

5. The hydraulic cylinder body sealing testing equipment as described in claim 4, characterized in that, The drive assembly includes a servo motor (42) fixedly mounted on the base plate (1). An incomplete gear (41) is fixedly mounted on the output shaft of the servo motor (42). A second support block (40) is rotatably connected to the side of the incomplete gear (41) away from the servo motor (42) to support it. The second support block (40) is fixedly mounted on the base plate (1). Gears (39) that cooperate with the incomplete gear (41) are provided on both sides. A third support block (43) is fixedly mounted on the base plate (1). A cylinder is rotatably connected to the third support block (43). One end of the cylinder is fixedly mounted to one of the gears (39). A toothed transmission belt (25) is installed between the other end of the cylinder and the shaft of the first threaded rod (20).

6. The hydraulic cylinder body sealing testing equipment as described in claim 5, characterized in that, The servo motor (42) has a second threaded rod (37) on one side. Multiple first support blocks (38) are rotatably connected to the second threaded rod (37) to support it. The first support blocks (38) are fixedly installed on the base plate (1). Another gear (39) is fixedly installed on the shaft of the second threaded rod (37). A piston cylinder (34) is fixedly installed on the base plate (1). A piston block is slidably connected inside the piston cylinder (34). A second piston rod (35) is fixedly installed on one side of the piston block. The end of the second piston rod (35) away from the piston block extends to the outside of the piston cylinder (34) and is fixedly installed with a push plate (36). The push plate (36) is threadedly connected to the second threaded rod (37). A first outlet pipe (26) is fixedly installed on one side of the piston cylinder (34). The end of the first outlet pipe (26) away from the piston cylinder (34) is fixedly installed with the double-headed hydraulic rod (30). A second outlet pipe (27) is fixedly installed on one side of the piston cylinder (34). The end of the second outlet pipe (27) away from the piston cylinder (34) is fixedly installed with the first hydraulic rod (12). A third outlet pipe (32) is fixedly installed on the piston cylinder (34). The end of the third outlet pipe (32) away from the piston cylinder (34) is fixedly installed with the second hydraulic rod (13). Solenoid valves (33) are fixedly installed on the first outlet pipe (26), the second outlet pipe (27), and the third outlet pipe (32).

7. A method for testing the sealing performance of a hydraulic cylinder body using the testing equipment as described in claim 6, characterized in that, Includes the following steps: Step 1: Measure the length of the hydraulic cylinder to be tested, adjust the distance between the two placement blocks (3), and place the hydraulic rod between the two placement blocks (3); Step 2: The second pressing plate (17) on the base plate (1) moves downward, and the moving second pressing plate (17) abuts against the hydraulic cylinder (7), so that the hydraulic cylinder (7) is fixedly installed on the placement block (3); Step 3: The rubber plug (9) on one side moves, and the moving rubber plug (9) blocks the connecting pipe (8) so that the connecting pipe (8) cannot release air; Step 4: The upper and lower locking blocks (28) move closer together to fix one end of the first piston rod (18) and push it back and forth, thereby detecting the sealing performance of the cylinder through the pressure sensor (21).

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