Servo hydraulic valve endurance test device

Abstract

The utility model belongs to the technical field of hydraulic servo valves, and discloses a servo hydraulic valve durability test device which comprises a rack and a workbench, a fixing plate is arranged at the top of the workbench, two fixing blocks are arranged on the workbench at intervals, a sliding rod is horizontally and slidably arranged on the fixing blocks, and a clamping plate is arranged at the end, close to the sliding rod, of the sliding rod. Sliding blocks are slidably arranged on the sides, away from the clamping plates, of the two sliding rods on the workbench, a driving assembly is arranged on the workbench, wedge-shaped blocks and supporting blocks are arranged on the sides, close to the sliding rods, of the sliding blocks, a connecting block is arranged between the ends of the two sliding blocks, a moving plate is arranged on the connecting block, and a detection assembly is further arranged on the workbench. The driving assembly drives the sliding block to slide, so that the sliding rod is pushed by the wedge block to slide to drive the clamping plate to move; the sliding block slides to drive the connecting block and the moving plate to move, so that the left-right position and the front-back position of the servo hydraulic valve are limited, the stable connection between the detection assembly and the servo hydraulic valve interface is ensured, and the accuracy of the detection result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of servo hydraulic valves, in particular to a servo hydraulic valve durability testing device. Background Art

[0002] The servo hydraulic valve is a very important component in the hydraulic system. Currently, most common hydraulic servo valves use servo motors as their power source. The servo motor achieves high-precision forward and reverse rotation through two-way signal feedback with the control system, driving the corresponding mechanism to adjust the hydraulic oil flow. When the hydraulic device is in use, its valve needs to withstand high pressure, so the product requirements are high. The use of some substandard products may lead to some major safety accidents. Therefore, hydraulic servo valves must undergo strict pressure testing after production to ensure the safety and reliability of the hydraulic valves.

[0003] A Chinese utility model patent with publication number CN220337189U discloses a servo hydraulic valve durability test device, including a workbench, a clamping table fixedly installed on the top of the workbench, a clamping mechanism arranged inside the clamping table, the clamping mechanism comprising a first slide groove, a second slide groove, a bidirectional screw rod, a threaded plate and a fixed rod, a first slide groove is opened inside the clamping table, a second slide groove is opened inside the clamping table and located on one side of the first slide groove, a bidirectional screw rod is rotatably connected inside the first slide groove, threaded plates are threadedly connected on both sides of the bidirectional screw rod, a fixed rod is fixedly connected inside the second slide groove, the threaded rod is rotated to drive the threaded plate to move, thereby clamping the servo hydraulic valve, a test mechanism is provided on the top of the clamping table and on one side of the clamping mechanism, and testing is performed through the test mechanism.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: when the above-mentioned device fixes the servo hydraulic valve, it can only limit the left and right positions of the servo hydraulic valve, making the front and rear positions of the servo hydraulic valve uncertain, resulting in difficulty in accurately connecting the test mechanism to the servo hydraulic valve interface, and thus making it difficult to ensure the accuracy of the test results. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a servo hydraulic valve durability testing device.

[0006] The above-mentioned technical objectives of the present utility model are achieved through the following technical solutions: a servo hydraulic valve durability testing device, comprising a frame, a workbench is provided on the top of the frame, a fixed plate is provided on the top of the workbench, two fixed blocks are provided at intervals on one side of the fixed plate on the workbench, a sliding rod is provided on the fixed block for horizontal sliding, a clamping plate is provided on one end of the sliding rod adjacent to the middle of the workbench, sliding blocks are provided on the workbench on the side of the two sliding rods away from the clamping plate, the end of the sliding rod contacts the sliding block, a driving component for driving the two sliding blocks to slide is provided on the workbench, a wedge block is provided on the side of the sliding block adjacent to the slide rod, a support block connected to the wedge block is provided on the side of the sliding block adjacent to the slide rod, a connecting block is provided between the ends of the two sliding blocks, a movable plate is provided on the connecting block, and a detection component is also provided on the workbench.

[0007] By adopting the above technical solution, a frame, a fixed plate, a clamping plate, a sliding block, a drive assembly, and a detection assembly are set. When the servo hydraulic valve needs to be tested, the servo hydraulic valve is first placed between the two clamping plates. The sliding block is then driven to slide by the drive assembly, so that the slide rod is pushed and slid by the wedge block, driving the clamping plate to move, limiting the front and rear position of the servo hydraulic valve. The slide rod is then supported by the support block to maintain the current position. During the sliding process of the sliding block, the connecting block and the movable plate are driven to move, so that the movable plate and the fixed plate clamp the servo hydraulic valve, limiting the left and right position of the servo hydraulic valve. Finally, the servo hydraulic valve is tested by the detection assembly. The left and right, front and rear positions of the servo hydraulic valve are all restricted, ensuring a stable connection between the detection assembly and the servo hydraulic valve interface, thereby ensuring the accuracy of the test results.

[0008] Furthermore, the detection component includes two mounting brackets arranged at intervals on the workbench, a driving cylinder is horizontally arranged on the mounting bracket, the piston rods of the two driving cylinders are arranged opposite to each other, and mounting seats are provided at the ends of the piston rods of the driving cylinders, one of the mounting brackets is provided with an air inlet pipe, and the air inlet pipe is connected to the air supply equipment, and the other mounting bracket is provided with an air outlet pipe and a pressure gauge, and one end of the air outlet pipe is connected to the air inlet of the pressure gauge.

[0009] By adopting the above technical solution, a mounting frame, a driving cylinder, a mounting seat, an air inlet pipe, an air outlet pipe, and a pressure gauge are set. After the servo hydraulic valve is fixed, the mounting seat is driven to move by the driving cylinder, so that the air inlet pipe is connected to the air inlet of the servo hydraulic valve, and the air outlet pipe is connected to the air outlet of the servo hydraulic valve. Then the air supply equipment supplies air to the servo hydraulic valve through the air inlet pipe, and then the gas will flow to the pressure gauge through the air outlet pipe. When the rated air pressure is reached, the air supply equipment will stop supplying air, and after a period of pressure maintenance, if the pressure value of the pressure gauge does not change significantly, the servo hydraulic valve is qualified.

[0010] Furthermore, a baffle is provided at one end of the sliding rod away from the splint, and two mounting plates are vertically spaced apart on the side of the baffle away from the sliding rod. A fixed shaft is provided between the two mounting plates, and a roller is rotatably provided on the fixed shaft, and the wheel surface of the roller contacts the sliding block.

[0011] By adopting the above technical solution, a baffle, a mounting plate and a fixed shaft are set, and the contact between the roller surface and the sliding block is achieved, thereby ensuring the stability of the wedge block in pushing the sliding rod to move.

[0012] Furthermore, a compression spring is provided on the rod body of the sliding rod located between the baffle and the fixed block, one end of the compression spring is connected to the baffle, and the other end is connected to the fixed block.

[0013] By adopting the above technical solution, a compression spring is provided on the rod body of the sliding rod between the baffle and the fixed block, so that when the sliding rod and the baffle move, the compression spring is compressed. When the driving assembly drives the sliding block to reset, the compression spring pushes the sliding rod and the splint to reset under the action of elastic force, which is more convenient.

[0014] Furthermore, a sliding hole is horizontally opened on the fixing block, and the sliding rod is slidably connected to the sliding hole.

[0015] By adopting the above technical solution, a sliding hole is horizontally opened on the fixed block to ensure the sliding stability of the sliding rod.

[0016] Furthermore, a mounting bar is provided on the fixed block, the mounting bar is parallel to the slide rod, a slide rail is provided on the lower side of the mounting bar, and the baffle is slidably connected to the slide rail via a slider.

[0017] By adopting the above technical solution, the installation strips, slide rails, sliders and slide rails are provided to ensure the stable sliding of the slide rod, thereby preventing the slide rod from being subjected to continuous lateral thrust due to long-term use, which may cause deformation of the slide hole or the slide rod.

[0018] Furthermore, the driving assembly includes a control plate commonly arranged on one end of the two sliding blocks away from the movable plate, a vertical plate is arranged on the side of the workbench away from the movable plate, a threaded rod is rotatably arranged between the vertical plate and the fixed plate, the control plate is spirally connected to the threaded rod through a threaded hole, a driving motor is horizontally arranged on the frame, and the output shaft of the driving motor is connected to the end of the threaded rod.

[0019] By adopting the above technical solution, a control panel, a vertical panel, a threaded rod and a drive motor are provided. The drive motor drives the threaded rod to rotate, so that the control panel moves and drives the two sliding blocks to slide synchronously.

[0020] Furthermore, the workbench is provided with sliding grooves at intervals, and the sliding blocks are slidably connected to the corresponding sliding grooves.

[0021] By adopting the above technical solution, sliding grooves are provided at intervals on the workbench to ensure the sliding stability of the sliding block.

[0022] In summary, the present invention has the following beneficial effects: a frame, a fixed plate, a clamping plate, a sliding block, a driving assembly, and a detection assembly are set. When the servo hydraulic valve needs to be detected, the servo hydraulic valve is first placed between the two clamping plates, and then the sliding block is driven to slide by the driving assembly, so that the slide rod is pushed to slide by the wedge block, driving the clamping plate to move, and limiting the front and rear positions of the servo hydraulic valve. Then the slide rod is supported by the support block to maintain the current position; during the sliding process of the sliding block, the connecting block and the movable plate are driven to move, so that the movable plate and the fixed plate clamp the servo hydraulic valve, and limit the left and right positions of the servo hydraulic valve. Finally, the servo hydraulic valve is detected by the detection assembly, and the left and right, front and rear positions of the servo hydraulic valve are all restricted, ensuring the stable connection between the detection assembly and the servo hydraulic valve interface, thereby ensuring the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a workbench and a drive assembly according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of a workbench and a detection assembly according to an embodiment of the present utility model;

[0026] Figure 4 It is a structural schematic diagram of the fixing block, the sliding rod and the mounting bar in an embodiment of the utility model.

[0027] In the figure: 10, frame; 11, workbench; 12, slide; 20, fixed plate; 30, fixed block; 31, slide hole; 40, slide rod; 41, clamping plate; 42, baffle; 43, mounting plate; 44, fixed shaft; 45, roller; 46, compression spring; 50, sliding block; 51, wedge block; 52, support block; 53, connecting block; 60, moving plate; 70, drive assembly; 71, control board; 72, vertical plate; 73, threaded rod; 74, drive motor; 80, detection assembly; 81, mounting frame; 82, drive cylinder; 83, mounting seat; 84, air inlet pipe; 85, air outlet pipe; 86, air pressure gauge; 90, mounting strip; 91, slide rail. DETAILED DESCRIPTION

[0028] The technical solutions 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; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] like Figure 1-4 As shown, the embodiment of the present application discloses a servo hydraulic valve durability test device, including a frame 10, a fixed block 30, a drive assembly 70, and a detection assembly 80. A workbench 11 is provided on the top of the frame 10, and a fixed plate 20 is provided on the top of the workbench 11. Two fixed blocks 30 are spaced apart on the workbench 11 on either side of the fixed plate 20, and the fixed blocks 30 are in contact with the fixed plate 20. A sliding rod 40 is provided on the fixed block 30 for horizontal sliding, and the length of the sliding rod 40 is consistent with the length of the fixed plate 20. A clamping plate 41 is provided at one end of the sliding rod 40 near the middle of the workbench 11, and the length of the clamping plate 41 is perpendicular to the length of the fixed plate 20. Sliding blocks 50 are provided on the workbench 11 on both sides of the sliding rod 40 away from the clamping plate 41, and the sliding direction of the sliding blocks 50 is perpendicular to the length of the fixed plate 20. The ends of the sliding rod 40 are in contact with the sliding blocks 50. The drive assembly 70 is provided on the workbench 11 and is used to drive the two sliding blocks 50 to slide. A wedge block 51 is provided on the side of the sliding block 50 adjacent to the sliding rod 40, and a support block 52 connected to the wedge block 51 is also provided on the side of the sliding block 50 adjacent to the sliding rod 40. A connecting block 53 is provided between the ends of the two sliding blocks 50, and a movable plate 60 is provided on the side of the connecting block 53 adjacent to the fixed plate 20. The detection component 80 is set on the workbench 11 for detecting the servo hydraulic valve.

[0030] The servo hydraulic valve is placed between two clamping plates 41. The drive assembly 70 then drives the sliding block 50, causing the wedge block 51 to push the slide rod 40, which in turn moves the clamping plates 41, restricting the servo hydraulic valve's forward and backward position. While the clamping plates 41 are restricting the servo hydraulic valve's forward and backward position, a slight gap exists between the clamping plates 41 and the servo hydraulic valve, preventing the servo hydraulic valve from being clamped, thus preventing the movable plate 60 from being unable to push the servo hydraulic valve. The slide rod 40 is then held in place by the support block 52. As the sliding block 50 slides, it also moves the connecting block 53 and the movable plate 60, causing the movable plate 60 and the fixed plate 20 to clamp the servo hydraulic valve, restricting its left and right position. The length of the movable plate 60 is less than the distance between the two clamping plates 41 at their closest point, preventing the movable plate 60 from becoming stuck. Finally, the servo hydraulic valve is tested by the detection assembly 80. Both the left and right and the forward and backward positions of the servo hydraulic valve are restricted, ensuring a stable connection between the detection assembly 80 and the servo hydraulic valve interface, thereby ensuring accurate test results.

[0031] Specifically, the workbench 11 is provided with slide grooves 12 at intervals, and the sliding blocks 50 are slidably connected to the corresponding slide grooves 12 to ensure the stability of the sliding of the sliding blocks 50. The drive assembly 70 includes a control plate 71 commonly provided at one end of the two sliding blocks 50 away from the movable plate 60, and the control plate 71 is located on the side of the fixed plate 20 away from the fixed block 30. A vertical plate 72 is provided on the side of the workbench 11 away from the movable plate 60, and a threaded rod 73 is rotatably provided between the vertical plate 72 and the fixed plate 20. The control plate 71 is spirally connected to the threaded rod 73 through a threaded hole, and the rotation of the threaded rod 73 drives the control plate 71 to move, thereby driving the two sliding blocks 50 to slide synchronously. One end of the threaded rod 73 passes through the vertical plate 72, and a drive motor 74 is horizontally provided on the frame 10. The output shaft of the drive motor 74 is connected to the end of the threaded rod 73 passing through the vertical plate 72, and the threaded rod 73 is driven to rotate by the drive motor 74.

[0032] During installation, a baffle 42 is provided on the end of the slide bar 40 away from the clamping plate 41. Two mounting plates 43 are vertically spaced apart on the side of the baffle 42 away from the slide bar 40. A fixed shaft 44 is provided between the two mounting plates 43. A roller 45 is rotatably provided on the fixed shaft 44. The surface of the roller 45 contacts the sliding block 50, ensuring the stability of the movement of the slide bar 40 pushed by the wedge block 51. A compression spring 46 is provided on the rod of the slide bar 40 located between the baffle 42 and the fixed block 30. One end of the compression spring 46 is connected to the baffle 42 and the other end is connected to the fixed block 30. When the slide bar 40 and the baffle 42 move, the compression spring 46 is compressed. When the driving assembly 70 drives the sliding block 50 to reset, the compression spring 46 pushes the slide bar 40 and the clamping plate 41 to reset under the action of the elastic force, which is more convenient. The fixed block 30 has a horizontally defined sliding hole 31, into which the sliding rod 40 is slidably connected, ensuring the stability of the sliding movement of the sliding rod 40. The sliding hole 31 is a square hole, and the sliding rod 40 is a square rod. A mounting bar 90 is provided on the fixed block 30, parallel to the sliding rod 40, extending from the fixed block 30 toward the fixed block 30, away from the center of the workbench 11. A slide rail 91 is provided on the underside of the mounting bar 90, and a baffle 42 is slidably connected to the slide rail 91 via a slider. The slide rail 91 ensures the stability of the sliding movement of the sliding rod 40, preventing the sliding rod 40 from being subjected to continuous lateral thrust, which could cause deformation of the sliding hole 31 or the sliding rod 40 during long-term use.

[0033] In a specific configuration, the detection assembly 80 includes two mounting brackets 81 spaced apart on the workbench 11 . The mounting brackets 81 are both mounted on a side of the fixing block 30 away from the center of the workbench 11 . A driving cylinder 82 is horizontally arranged on the mounting frame 81, and the piston rods of the two driving cylinders 82 are arranged opposite to each other. A mounting seat 83 is provided at the end of the piston rod of the driving cylinder 82. An air inlet pipe 84 is provided on one of the mounting seats 83, and the air inlet pipe 84 is connected to the air supply equipment. The other mounting seat 83 is provided with an air outlet pipe 85 and a pressure gauge 86. One end of the air outlet pipe 85 is connected to the air inlet of the pressure gauge 86. After the servo hydraulic valve is fixed, the driving cylinder 82 drives the mounting seat 83 to move, so that the air inlet pipe 84 is connected to the air inlet of the servo hydraulic valve, and the air outlet pipe 85 is connected to the air outlet of the servo hydraulic valve. Then the air supply equipment supplies air to the servo hydraulic valve through the air inlet pipe 84, and then the gas will flow to the pressure gauge 86 through the air outlet pipe 85. When the rated air pressure is reached, the air supply equipment will stop supplying air. After a period of pressure maintenance, if the pressure value of the pressure gauge 86 does not change significantly, the servo hydraulic valve is qualified.

[0034] The operating principle of the servo hydraulic valve durability test device in this embodiment is as follows: When testing a servo hydraulic valve, the servo hydraulic valve is first placed between two clamping plates 41. Then, the drive motor 74 is activated to drive the threaded rod 73 to rotate, thereby moving the control plate 71 and driving the two sliding blocks 50 to slide synchronously. The sliding blocks 50 slide so that the roller 45 contacts the wedge block 51. The wedge block 51 pushes the roller 45 and the sliding rod 40 to move, driving the clamping plates 41 to move, thereby limiting the forward and backward position of the servo hydraulic valve. The sliding rod 40 is then supported by the support block 52 to maintain its current position. During the sliding process of the sliding block 50, the connecting block 53 and the movable plate 60 are driven to move, so that the movable plate 60 and the fixed plate 20 clamp the servo hydraulic valve, restricting the left and right positions of the servo hydraulic valve. Finally, the driving cylinder 82 is started, and the driving cylinder 82 drives the mounting seat 83 to move, so that the air inlet pipe 84 is connected to the air inlet of the servo hydraulic valve, and the air outlet pipe 85 is connected to the air outlet of the servo hydraulic valve. Then, the air supply device supplies air to the servo hydraulic valve through the air inlet pipe 84, and then the gas flows to the pressure gauge 86 through the air outlet pipe 85. When the rated air pressure is reached, the air supply device stops supplying air. After a period of pressure maintenance, if the pressure value of the pressure gauge 86 does not change significantly, the servo hydraulic valve is qualified. The left and right and front and back positions of the servo hydraulic valve are restricted, ensuring the stable connection between the air outlet pipe 85, the air inlet pipe 84 and the servo hydraulic valve interface, thereby ensuring the accuracy of the test results.

[0035] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A servo hydraulic valve durability test device, characterized by: The invention comprises a frame (10), a workbench (11) is provided on the top of the frame (10), a fixed plate (20) is provided on the top of the workbench (11), two fixed blocks (30) are provided on the workbench (11) at intervals on one side of the fixed plate (20), a slide rod (40) is provided on the fixed block (30) for horizontal sliding, a clamping plate (41) is provided on one end of the slide rod (40) near the middle of the workbench (11), a slide block (50) is provided on the workbench (11) on both sides of the two slide rods (40) away from the clamping plate (41), and the slide rod (40) is provided on the side of the two slide rods (40) away from the clamping plate (41). 0) ends are in contact with a sliding block (50), a driving assembly (70) for driving the two sliding blocks (50) to slide is provided on the workbench (11), a wedge block (51) is provided on the side of the sliding block (50) adjacent to the slide rod (40), a supporting block (52) connected to the wedge block (51) is also provided on the side of the sliding block (50) adjacent to the slide rod (40), a connecting block (53) is provided between the ends of the two sliding blocks (50), a moving plate (60) is provided on the connecting block (53), and a detection assembly (80) is also provided on the workbench (11).

2. A servo hydraulic valve durability test device according to claim 1, characterized in that: The detection assembly (80) comprises two mounting frames (81) spaced apart and arranged on a workbench (11); a driving cylinder (82) is horizontally arranged on the mounting frame (81); the piston rods of the two driving cylinders (82) are arranged opposite to each other; the piston rod ends of the driving cylinders (82) are provided with mounting seats (83); one of the mounting seats (83) is provided with an air inlet pipe (84), and the air inlet pipe (84) is connected to an air supply device; the other mounting seat (83) is provided with an air outlet pipe (85) and a pressure gauge (86); one end of the air outlet pipe (85) is connected to the air inlet of the pressure gauge (86).

3. The servo hydraulic valve durability test device according to claim 1, characterized in that: A baffle (42) is provided at one end of the slide bar (40) away from the clamping plate (41); two mounting plates (43) are vertically spaced apart on one side of the baffle (42) away from the slide bar (40); a fixed shaft (44) is provided between the two mounting plates (43); a roller (45) is rotatably provided on the fixed shaft (44); and a wheel surface of the roller (45) contacts the sliding block (50).

4. The servo hydraulic valve durability test device according to claim 3, characterized in that: A compression spring (46) is provided on the rod body of the slide rod (40) located between the baffle (42) and the fixed block (30); one end of the compression spring (46) is connected to the baffle (42) and the other end is connected to the fixed block (30).

5. The servo hydraulic valve durability test device according to claim 1, characterized in that: A sliding hole (31) is horizontally opened on the fixed block (30), and the sliding rod (40) is slidably connected to the sliding hole (31).

6. The servo hydraulic valve durability test device according to claim 4, characterized in that: The fixed block (30) is provided with a mounting bar (90), the mounting bar (90) is parallel to the slide bar (40), a slide rail (91) is provided on the lower side of the mounting bar (90), and the baffle (42) is slidably connected to the slide rail (91) via a slider.

7. The servo hydraulic valve durability test device according to claim 1, characterized in that: The driving assembly (70) includes a control board (71) commonly arranged at one end of the two sliding blocks (50) away from the movable plate (60), a vertical board (72) is arranged on the side of the workbench (11) away from the movable plate (60), a threaded rod (73) is rotatably arranged between the vertical board (72) and the fixed plate (20), the control board (71) is spirally connected to the threaded rod (73) through a threaded hole, and a driving motor (74) is horizontally arranged on the frame (10), and the output shaft of the driving motor (74) is connected to the end of the threaded rod (73).

8. The servo hydraulic valve durability test device according to claim 1, characterized in that: Slide grooves (12) are spaced apart on the workbench (11), and the sliding blocks (50) are slidably connected to the corresponding slide grooves (12).

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