A test bench for oil cylinder

Abstract

The utility model relates to the technical field of oil cylinder test, and disclose an oil cylinder test bench, including the detection platform, the top outer surface fixed connection of sliding plate has the push board, two the opposite outer surface rotationally connected with screw rod of fixed plate, the outer surface fixed connection of screw rod has the rocking handle, the outer surface screw thread connection of screw rod has the screw plate, the outer surface of push board is equipped with first pressure sensor. In the utility model, through the oil cylinder fixed, make the oil cylinder work, oil cylinder drives push board to move, make the sliding plate slide on the surface of sliding rod, judge the stroke of oil cylinder through the position of indicating rod, and cooperate rocking handle and screw rod, adjust the position of baffle rod, make baffle rod block the sliding plate, judge the endurance of oil cylinder through the value of first pressure sensor, so that the test bench integrates the stroke measurement and endurance measurement of oil cylinder, need not frequent installation and removal oil cylinder, improved the efficiency of oil cylinder test.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder testing technology, specifically to a hydraulic cylinder testing bench. Background Technology

[0002] In hydraulic systems, the hydraulic cylinder is the core actuator that realizes linear reciprocating motion. Its performance directly affects the stability and reliability of equipment operation. When manufacturing hydraulic cylinders, it is necessary to test the cylinder's stroke and the endurance of the cylinder's output end.

[0003] In the prior art, when testing a hydraulic cylinder, the cylinder is usually fixed and its travel is tested. After the test is completed, the cylinder needs to be removed and then fixed on a test endurance device to test the endurance of the cylinder output end. Repeated disassembly and reassembly of the cylinder leads to low testing efficiency. Therefore, a hydraulic cylinder test bench is proposed. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a hydraulic cylinder test bench to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder test bench, including a test bench, two side plates arranged symmetrically on the top outer surface of the test bench, two sliding rods fixedly connected between the two side plates, a sliding plate movably sleeved on the outer surface of the two sliding rods, a push plate fixedly connected to the top outer surface of the sliding plate, scale lines opened on the outer surface of the test bench, and an indicator rod fixedly connected to the outer surface of the sliding plate;

[0006] Two fixed plates arranged symmetrically on the bottom outer surface of the testing platform are fixedly connected. A lead screw is rotatably connected to the opposite outer surface of the two fixed plates. A crank is fixedly connected to the outer surface of the lead screw. A threaded plate is threadedly connected to the outer surface of the lead screw. A rotating seat is fixedly connected to the top outer surface of the threaded plate. A rotating block is rotatably connected to the outer surface of the rotating seat. A stop bar is fixedly connected to the top outer surface of the rotating block. A first pressure sensor is installed on the outer surface of the push plate.

[0007] Furthermore, a fixed cylinder is fixedly connected to the top outer surface of the right-side side plate, and a rotating shaft is rotatably connected to the center of the inner surface of the fixed cylinder. A motor is fixedly installed on the outer surface of the fixed cylinder, and the output end of the motor is fixedly connected to the rotating shaft. Multiple threaded rods are rotatably connected in a circumferential array on the inner surface of the fixed cylinder. A driving bevel gear is fixedly sleeved on the outer surface of the rotating shaft, and a driven bevel gear is fixedly sleeved on the outer surface of each of the multiple threaded rods. The outer surfaces of the driving bevel gear and the driven bevel gear are movably meshed. A threaded block is threadedly connected to the outer surface of the threaded rod, and a connecting rod is fixedly connected to the outer surface of the threaded block. A connecting plate is fixedly connected to the outer surface of the connecting rod.

[0008] Furthermore, a second pressure sensor is fixedly installed on the bottom outer surface of the connecting plate, and an arc-shaped clamp is fixedly connected to the outer surface of the pressure sensor. The first pressure sensor, the second pressure sensor, and the motor are all electrically connected to an external controller.

[0009] Furthermore, a positioning plate is fixedly connected to the outer surface of the rotating block, and positioning holes are provided on the outer surfaces of both the threaded plate and the positioning plate. Positioning pins are movably inserted into the corresponding positioning holes of the positioning plate and the threaded plate.

[0010] Furthermore, a support block is fixedly connected to the top outer surface of the threaded plate.

[0011] Furthermore, a groove is provided on the top outer surface of the testing platform, and the rotating block and the stop rod are located inside the groove when they are perpendicular to the horizontal plane.

[0012] Furthermore, the outer surface of the fixed cylinder is provided with multiple strip grooves, and the multiple connecting rods are respectively slidably connected to the interior of the multiple strip grooves.

[0013] Furthermore, the center of the first pressure sensor and the center of the fixed cylinder are located on the same axis.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This hydraulic cylinder test bench, after fixing the hydraulic cylinder, enables the cylinder to operate. The hydraulic cylinder drives the push plate to move, causing the slide plate to slide on the surface of the slide rod. The position of the indicator rod is used to determine the stroke of the hydraulic cylinder. In conjunction with the crank handle and lead screw, the position of the stop rod is adjusted so that the stop rod blocks the slide plate. The endurance of the hydraulic cylinder is determined by the value of the first pressure sensor. Thus, this test bench integrates the measurement of the hydraulic cylinder stroke and endurance, eliminating the need for frequent installation and disassembly of the hydraulic cylinder, thereby improving the efficiency of hydraulic cylinder testing.

[0016] 2. The hydraulic cylinder test bench is driven by a motor to rotate the shaft. With the help of the active bevel gear and the driven bevel gear, the threaded rod rotates. When the threaded rod rotates, it drives the threaded block to move, which in turn drives the connecting rod to move the arc-shaped clamping plate to clamp the hydraulic cylinder. The clamping force of the arc-shaped clamping plate is controlled by a pressure sensor, thereby stably clamping the hydraulic cylinder. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixing cylinder and related structures of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the fixed cylinder of this utility model;

[0021] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Testing platform; 2. Side plate; 3. Slide rod; 4. Slide plate; 5. Push plate; 6. Lead screw; 7. Handle; 8. Threaded plate; 9. Rotating seat; 10. Rotating block; 11. Stop bar; 12. Positioning plate; 13. Positioning pin; 14. Fixed cylinder; 15. Rotating shaft; 16. Motor; 17. Threaded rod; 18. Threaded block; 19. Connecting rod; 20. Connecting plate; 21. Second pressure sensor; 22. Arc-shaped clamp; 23. Driving bevel gear; 24. Driven bevel gear; 25. Indicator rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to the following: Figures 1-5This utility model provides a technical solution: a hydraulic cylinder test bench, including a test bench 1. Two side plates 2 arranged symmetrically on the top outer surface of the test bench 1 are fixedly connected. Two sliding rods 3 are fixedly connected between the two side plates 2. A sliding plate 4 is movably fitted on the outer surface of the two sliding rods 3. A push plate 5 is fixedly connected to the top outer surface of the sliding plate 4. The outer surface of the test bench 1 has scale lines. An indicator rod 25 is fixedly connected to the outer surface of the sliding plate 4. Specifically, the hydraulic cylinder to be tested is clamped and fixed, so that the hydraulic cylinder works. When the hydraulic cylinder moves linearly, it drives the push plate 5 to move. The push plate 5 drives the sliding plate 4 to slide on the sliding rods 3. The stroke of the hydraulic cylinder is determined according to the position of the indicator rod 25. First, the position of the extension end of the hydraulic cylinder in the initial state is determined. Then, the stroke of the hydraulic cylinder is obtained by subtracting the initial position scale of the extension end from the position scale of the indicator rod 25. Thus, the stroke of the hydraulic cylinder is measured.

[0025] Two symmetrically arranged fixed plates are fixedly connected to the bottom outer surface of the testing platform 1. A lead screw 6 is rotatably connected to the opposite outer surface of the two fixed plates. A crank handle 7 is fixedly connected to the outer surface of the lead screw 6. A threaded plate 8 is threadedly connected to the outer surface of the lead screw 6. A rotating seat 9 is fixedly connected to the top outer surface of the threaded plate 8. A rotating block 10 is rotatably connected to the outer surface of the rotating seat 9. A stop rod 11 is fixedly connected to the top outer surface of the rotating block 10. A first pressure sensor is installed on the outer surface of the push plate 5. Specifically, when it is necessary to test the endurance of the hydraulic cylinder... The stop lever 11 is positioned perpendicular to the threaded plate 8. The crank handle 7 is turned, which drives the lead screw 6 to rotate. The rotation of the lead screw 6 causes the threaded plate 8 to move, which in turn causes the stop lever 11 to move. The stop lever 11 moves to one side of the slide plate 4, where the hydraulic cylinder contacts the first pressure sensor. As the hydraulic cylinder extends, the stop lever 11 blocks the slide plate 4, preventing it from moving. As the hydraulic cylinder extends, it presses against the first pressure sensor, causing the first pressure sensor to sense a value. The hydraulic cylinder's endurance is determined by the value of the first pressure sensor.

[0026] In this embodiment, a fixed cylinder 14 is fixedly connected to the top outer surface of the right side plate 2. A rotating shaft 15 is rotatably connected to the center of the inner surface of the fixed cylinder 14. A motor 16 is fixedly installed on the outer surface of the fixed cylinder 14. The output end of the motor 16 is fixedly connected to the rotating shaft 15. Multiple threaded rods 17 are rotatably connected in a circumferential array on the inner surface of the fixed cylinder 14. A driving bevel gear 23 is fixedly sleeved on the outer surface of the rotating shaft 15. A driven bevel gear 24 is fixedly sleeved on the outer surface of each of the multiple threaded rods 17. The driving bevel gear 23 and the driven bevel gear 24 are movably meshed on their outer surfaces. A threaded block 18 is threadedly connected to the outer surface of the threaded rod 17. The outer surface of the threaded block 18 is fixed. A connecting rod 19 is connected, and a connecting plate 20 is fixedly connected to the outer surface of the connecting rod 19. Specifically, one end of the oil cylinder is attached to the fixed cylinder 14. The motor 16 works, and the motor 16 drives the rotating shaft 15 to rotate. The rotation of the rotating shaft 15 drives the active bevel gear 23 on it to rotate. The active bevel gear 23 drives the driven bevel gear 24 to rotate. The driven bevel gear 24 drives the threaded rod 17 to rotate. The threaded rod 17 drives the threaded block 18 to move, so that the threaded block 18 drives the connecting rod 19 to move. There is a certain distance between the arc-shaped clamp 22 and the fixed cylinder 14, so that when the arc-shaped clamp 22 fixes the oil cylinder, it can hold the cylindrical end of the oil cylinder.

[0027] In this embodiment, a second pressure sensor 21 is fixedly installed on the bottom outer surface of the connecting plate 20. An arc-shaped clamping plate 22 is fixedly connected to the outer surface of the pressure sensor. The first pressure sensor, the second pressure sensor 21, and the motor 16 are all electrically connected to an external controller. Specifically, multiple arc-shaped clamping plates 22 hold the oil cylinder, and the clamping force of the arc-shaped clamping plates 22 is sensed by the second pressure sensor 21. When the pressure sensor senses a certain value, such as 100N, it sends a signal to the controller. The controller receives the signal and causes the motor 16 to stop working, thereby stably clamping the oil cylinder. By setting the arc-shaped clamping plate 22, since the fixed end of the oil cylinder is cylindrical, when clamping oil cylinders of different sizes, the arc-shaped clamping plate 22 clamps the oil cylinder with at least two symmetrical support points.

[0028] In this embodiment, a positioning plate 12 is fixedly connected to the outer surface of the rotating block 10. Positioning holes are provided on the outer surfaces of the threaded plate 8 and the positioning plate 12. Positioning pins 13 are movably inserted into the corresponding positioning holes of the positioning plate 12 and the threaded plate 8. Specifically, when the stop rod 11 is rotated to a state perpendicular to the horizontal plane, the positioning holes on the positioning plate 12 and the threaded plate 8 are located on the same vertical line. Then, the positioning pins 13 are inserted into the corresponding positioning holes of the positioning plate 12 and the threaded plate 8 to limit the stop rod 11.

[0029] In this embodiment, a support block is fixedly connected to the top outer surface of the threaded plate 8. Specifically, the support block supports one end of the stop rod 11. When the stop rod 11 is released from its limit, force is applied to the stop rod 11, causing the stop rod 11 to drive the rotating block 10 to rotate, rotating the stop rod 11 to a state parallel to the horizontal plane, thus preventing one end of the stop rod 11 from touching the surface of the lead screw 6.

[0030] In this embodiment, a groove is provided on the top outer surface of the detection table 1. When the rotating block 10 and the stop rod 11 are perpendicular to the horizontal plane, the rotating block 10 and the stop rod 11 are located inside the groove. Specifically, the screw 6 rotates to drive the threaded plate 8 to move, so that the rotating block 10 and the stop rod 11 slide inside the groove. The groove provides a channel for the movement of the rotating block 10 and the stop rod 11.

[0031] In this embodiment, the outer surface of the fixed cylinder 14 is provided with multiple strip grooves, and multiple connecting rods 19 are slidably connected to the interior of the multiple strip grooves. Specifically, when the threaded rod 17 drives the threaded block 18 to move, the connecting rod 19 slides inside the strip groove. The strip groove provides space for the movement of the connecting rod 19 and limits the movement of the threaded block 18, preventing the threaded block 18 from rotating with the rotation of the threaded rod 17.

[0032] In this embodiment, the center of the first pressure sensor and the center of the fixed cylinder 14 are on the same axis. Specifically, when the hydraulic cylinder is installed, the center of the hydraulic cylinder is also on the same axis as the center of the fixed cylinder 14, so that the output end of the hydraulic cylinder can accurately correspond to the first pressure sensor when it is working.

[0033] Working Principle: In use, the hydraulic cylinder to be tested is clamped and fixed, causing the cylinder to operate. When the cylinder moves linearly, it drives the push plate 5 to move. The push plate 5 then drives the slide plate 4 to slide on the slide rod 3. The stroke of the cylinder is determined by the position of the indicator rod 25. First, the initial position of the telescopic end of the cylinder is determined. Then, the stroke of the cylinder is obtained by subtracting the initial position scale of the telescopic end from the position scale of the indicator rod 25. When the cylinder's endurance needs to be tested, the stop rod 11 is rotated to a position perpendicular to the threaded plate 8. The positioning pin 13 is inserted into the positioning holes on the positioning plate 12 and the threaded plate 8 to limit the stop rod 11. With rod 11 perpendicular to threaded plate 8, crank handle 7 is turned, causing lead screw 6 to rotate. The rotation of lead screw 6 moves threaded plate 8, causing stop rod 11 to move. Stop rod 11 moves to one side of slide plate 4, where the cylinder contacts the first pressure sensor. As the cylinder extends, stop rod 11 blocks slide plate 4, preventing it from moving. As the cylinder extends, it presses against the first pressure sensor, causing it to sense a value. The cylinder's endurance is determined by the value of the first pressure sensor. Thus, this test bench integrates cylinder stroke measurement and endurance measurement, eliminating the need for frequent cylinder installation and disassembly, and improving the efficiency of cylinder testing.

[0034] When the hydraulic cylinder is fixed, one end of the cylinder is attached to the fixed cylinder 14. The motor 16 works, and the motor 16 drives the rotating shaft 15 to rotate. The rotation of the rotating shaft 15 drives the active bevel gear 23 on it to rotate. The active bevel gear 23 drives the driven bevel gear 24 to rotate. The driven bevel gear 24 drives the threaded rod 17 to rotate. The threaded rod 17 drives the threaded block 18 to move, so that the threaded block 18 drives the connecting rod 19 to move. This causes multiple arc-shaped clamping plates 22 to hold the hydraulic cylinder. The clamping force of the arc-shaped clamping plates 22 is sensed by the second pressure sensor 21. When the pressure sensor senses a certain value, such as 100N, it sends a signal to the controller. The controller receives the signal and causes the motor 16 to stop working, thereby stably clamping the hydraulic cylinder.

[0035] The controller is an existing structure, and the control circuit can be implemented by a person skilled in the art through simple programming. It is common knowledge in the field. It is only used and not modified. Therefore, the control method and circuit connection will not be described in detail.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test bench for oil cylinders, comprising a test bench (1), characterized in that: The top outer surface of the testing platform (1) is fixedly connected to two side plates (2) arranged symmetrically on the left and right. Two slide rods (3) are fixedly connected between the two side plates (2). The outer surface of the two slide rods (3) is movably fitted with a slide plate (4). The top outer surface of the slide plate (4) is fixedly connected to a push plate (5). The outer surface of the testing platform (1) is provided with scale lines. The outer surface of the slide plate (4) is fixedly connected to an indicator rod (25). The bottom outer surface of the testing platform (1) is fixedly connected to two fixed plates arranged symmetrically on the left and right. The outer surfaces of the two fixed plates are rotatably connected to a lead screw (6). The outer surface of the lead screw (6) is fixedly connected to a crank handle (7). The outer surface of the lead screw (6) is threadedly connected to a threaded plate (8). The top outer surface of the threaded plate (8) is fixedly connected to a rotating seat (9). The outer surface of the rotating seat (9) is rotatably connected to a rotating block (10). The top outer surface of the rotating block (10) is fixedly connected to a stop bar (11). The outer surface of the push plate (5) is equipped with a first pressure sensor.

2. The test stand of claim 1, wherein: A fixed cylinder (14) is fixedly connected to the top outer surface of the right side plate (2). A rotating shaft (15) is rotatably connected to the center of the inner surface of the fixed cylinder (14). A motor (16) is fixedly installed on the outer surface of the fixed cylinder (14). The output end of the motor (16) is fixedly connected to the rotating shaft (15). Multiple threaded rods (17) are rotatably connected in a circular array on the inner surface of the fixed cylinder (14). An active bevel gear (23) is fixedly sleeved on the outer surface of the rotating shaft (15). A driven bevel gear (24) is fixedly sleeved on the outer surface of each of the multiple threaded rods (17). The active bevel gear (23) and the driven bevel gear (24) are movably meshed on the outer surface of the driven bevel gear (24). A threaded block (18) is threadedly connected to the outer surface of the threaded rod (17). A connecting rod (19) is fixedly connected to the outer surface of the threaded block (18). A connecting plate (20) is fixedly connected to the outer surface of the connecting rod (19).

3. The test stand of claim 2, wherein: The second pressure sensor (21) is fixedly installed on the bottom outer surface of the connecting plate (20), and an arc-shaped clamp (22) is fixedly connected to the outer surface of the pressure sensor. The first pressure sensor, the second pressure sensor (21) and the motor (16) are all electrically connected to the external controller.

4. The test stand of claim 1, wherein: The outer surface of the rotating block (10) is fixedly connected to a positioning plate (12). The outer surfaces of the threaded plate (8) and the positioning plate (12) are provided with positioning holes. Positioning pins (13) are movably inserted into the corresponding positioning holes of the positioning plate (12) and the threaded plate (8).

5. The test stand of claim 1, wherein: A support block is fixedly connected to the top outer surface of the threaded plate (8).

6. The hydraulic cylinder test bench according to claim 1, characterized in that: The top outer surface of the testing platform (1) is provided with a sliding groove. When the rotating block (10) and the stop bar (11) are perpendicular to the horizontal plane, the rotating block (10) and the stop bar (11) are located inside the sliding groove.

7. A hydraulic cylinder test bench according to claim 2, characterized in that: The outer surface of the fixed cylinder (14) is provided with multiple strip grooves, and the multiple connecting rods (19) are respectively slidably connected to the interior of the multiple strip grooves.

8. A hydraulic cylinder test bench according to claim 2, characterized in that: The center of the first pressure sensor and the center of the fixed cylinder (14) are on the same axis.

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