Hydraulic testing device for oil cylinder

Abstract

The utility model provides a kind of hydraulic testing device for oil cylinder, it is related to oil cylinder test technical field, including test cabinet, the test cabinet is fixedly installed on test table, the test cabinet is provided with hydraulic system oil tank, the hydraulic system oil tank is connected with the oil inlet and oil outlet of the oil cylinder to be measured by oil pipe and sealing joint, control panel is provided on the test cabinet, the utility model is cooperated by limiting ring and spring, both can be adjusted by screw rod and compacted force, ensure the tight connection of sealing joint and oil cylinder oil port, prevent oil leakage to affect test accuracy, also can avoid over-tight damage oil port or joint by the buffering effect of spring, fixed box and arc-shaped support seat linkage, with oil cylinder fixed synchronous completion joint fastening, simplify operation process, can adapt to different diameter sealing joint, improve the adaptability of device to oil circuit connection.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder testing technology, and more specifically, to a hydraulic testing device for hydraulic cylinders. Background Technology

[0002] As the core actuator of a hydraulic system, the hydraulic performance of the cylinder, such as its pressure resistance limit, sealing performance, and action response speed, directly affects the operational stability of the entire machine. Therefore, it must be tested by a hydraulic testing device before leaving the factory.

[0003] In the prior art, there are some devices for hydraulic testing of hydraulic cylinders. For example, the hydraulic cylinder hydraulic testing device disclosed in patent publication number CN221074851U includes an electrical control box, a control panel on one side of the electrical control box, a test bench fixedly connected to the bottom of the electrical control box, a hydraulic system oil tank on the inner side of the test bench, an oil receiving groove on the top of the test bench, and a clamping mechanism on the top of the test bench. After being started by an electric push rod, the clamping pad is pushed to move. After the clamping pad contacts the surface of the hydraulic cylinder, it can rotate along the side plate according to the angle of the contact surface, which improves the fit between the clamping pad and the hydraulic cylinder contact surface and improves the clamping stability. In addition, the damping rod and damping spring can support the placement plate, and at the same time, when the test bench is subjected to external forces such as collisions, it can reduce the large shaking of the surface of the placement plate caused by external forces, and reduce the large fluctuation of oil pressure.

[0004] However, the oil port connection structure of existing testing devices generally lacks a targeted sealing and fastening design. Most devices only use simple threaded connections to connect the hydraulic pipeline to the oil port of the cylinder. When using threaded connections, manual tightening is required to ensure a seal. If the tightening force is insufficient, high-pressure oil can easily leak out from the thread gap. If the tightening is excessive, it will cause the oil port thread or joint to deform, which will damage the sealing surface, aggravate leakage, and seriously affect the test results. Utility Model Content

[0005] The main objective of this invention is to provide a hydraulic testing device for oil cylinders, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A hydraulic testing device for a hydraulic cylinder includes a test cabinet, which is fixedly installed on a test bench. A hydraulic system oil tank is provided inside the test cabinet. The hydraulic system oil tank is sealed to the oil inlet and oil outlet of the hydraulic cylinder under test through oil pipes and sealing joints. A control panel is provided on the test cabinet.

[0008] A first fixing mechanism is disposed on one side of the test cabinet. The first fixing mechanism includes a pressure block, which is pressed against the oil cylinder to be tested.

[0009] The second fixing mechanism is set on the test bench. The second fixing mechanism includes two symmetrically arranged arc-shaped support seats, and the two arc-shaped support seats are respectively pressed against the inner sidewalls of both ends of the oil cylinder to be tested.

[0010] A fastening mechanism is provided on one side of the arc-shaped support base. The fastening mechanism includes a limiting ring, which is sleeved on the sealing joint and presses the sealing joint against the oil inlet and outlet of the oil cylinder to be tested.

[0011] Preferably, the first fixing mechanism further includes a hydraulic cylinder, with both ends of the hydraulic cylinder body fixedly mounted on a first mounting plate and a second mounting plate, one end of the first mounting plate and the second mounting plate being fixedly connected to the test cabinet, and the pressure block being fixedly mounted on the output end of the hydraulic cylinder.

[0012] Preferably, the second fixing mechanism further includes a mounting base, which is fixedly mounted on the upper surface of the test bench. A motor is fixedly mounted on one end of the mounting base, and a bidirectional lead screw is fixedly connected to the output end of the motor.

[0013] Preferably, the bidirectional lead screw is disposed in the mounting base, and the end away from the motor output end is rotatably connected to the inner wall of the mounting base, and both ends of the bidirectional lead screw are threadedly connected with lead screw sleeves.

[0014] Preferably, a slide is fixedly connected to the upper surface of the lead screw sleeve, the slide is slidably connected to the mounting base, and the arc-shaped support base is fixedly installed on the upper surface of the slide.

[0015] Preferably, the fastening mechanism further includes a fixing box, which is fixedly connected to one side of the upper end of the arc-shaped support base, and a screw is threaded to one end of the fixing box.

[0016] Preferably, a slider is slidably connected inside the fixing box, one end of the screw located inside the fixing box is rotatably connected to the slider, a spring is fixedly connected to the side of the slider away from the screw, and the end of the spring away from the slider is fixedly connected to the limiting ring.

[0017] Preferably, one end of the limiting ring is slidably connected to the inner wall of the fixing box, and the other end is abutted against the sealing joint.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The first fixing mechanism presses the cylinder under test on the outside, and the second fixing mechanism supports and supports the cylinder under test on the inside, forming a double fixing of inner support and outer pressing. This can achieve stable fixing of cylinders of different lengths and inner diameters, improve the versatility of the device and the stability of the cylinder under test during the test, effectively avoid displacement or shaking of the cylinder due to force during high pressure test, and reduce test data deviation.

[0020] (2) The limiting ring and the spring work together to adjust the clamping force through the screw, ensuring a tight connection between the sealing joint and the oil port of the cylinder, preventing oil leakage from affecting the test accuracy. The spring also helps to prevent excessive tightness from damaging the oil port or joint. The fixed box and the arc support are linked, and the joint is tightened synchronously with the oil cylinder, simplifying the operation process. It can adapt to sealing joints of different diameters and improve the adaptability of the device to oil circuit connections. Attached Figure Description

[0021] Figure 1 This is a first-view perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a second-view perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0023] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention;

[0025] Figure 5 This utility model Figure 4 Enlarged view of the structure at point B in the middle.

[0026] In the diagram: 1. Test cabinet; 2. Fastening mechanism; 21. Fixing box; 22. Screw; 23. Slider; 24. Spring; 25. Limiting ring; 3. First fixing mechanism; 31. First mounting plate; 32. Hydraulic cylinder; 33. Second mounting plate; 34. Pressure block; 4. Second fixing mechanism; 41. Mounting base; 42. Motor; 43. Double-acting lead screw; 44. Lead screw sleeve; 45. Slide table; 46. Arc-shaped support base; 5. Hydraulic system oil tank; 6. Control panel; 7. Test bench; 8. Cylinder under test; 9. Sealing joint; 10. Oil pipe. Detailed Implementation

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

[0028] like Figures 1-4 As shown, this utility model embodiment proposes a hydraulic testing device for a cylinder, including a test cabinet 1, which is fixedly installed on a test bench 7. A hydraulic system oil tank 5 is provided inside the test cabinet 1. The hydraulic system oil tank 5 is sealed to the oil inlet and oil outlet of the cylinder to be tested 8 through an oil pipe 10 and a sealing joint 9. A control panel 6 is provided on the test cabinet 1.

[0029] The first fixing mechanism 3 is located on one side of the test cabinet 1. The first fixing mechanism 3 includes a pressure block 34, which is pressed against the oil cylinder 8 to be tested.

[0030] The second fixing mechanism 4 is set on the test bench 7. The second fixing mechanism 4 includes two symmetrically arranged arc-shaped support seats 46, which abut against the inner sidewalls of both ends of the oil cylinder 8 to be tested.

[0031] Fastening mechanism 2 is located on one side of the arc-shaped support base 46. Fastening mechanism 2 includes a limiting ring 25, which is sleeved on the sealing joint 9 and presses the sealing joint 9 against the oil inlet and oil outlet of the oil cylinder 8 to be tested.

[0032] like Figure 1 , Figure 2 As shown, the first fixing mechanism 3 also includes a hydraulic cylinder 32. The two ends of the hydraulic cylinder 32 are fixedly installed on the first mounting plate 31 and the second mounting plate 33 respectively. One end of the first mounting plate 31 and the second mounting plate 33 is fixedly connected to the test cabinet 1. The pressure block 34 is fixedly installed on the output end of the hydraulic cylinder 32.

[0033] The cylinder body of the hydraulic cylinder 32 is fixed to one side of the test cabinet 1 by the first mounting plate 31 and the second mounting plate 33. When working, the hydraulic cylinder 32 drives the pressure block 34 to approach the oil cylinder 8 to be tested and press it against the outer wall of the oil cylinder to be tested, thereby pressing and fixing the outer side of the oil cylinder 8 to be tested. After the test is completed, the hydraulic cylinder 32 retracts and drives the pressure block 34 to reset, releasing the oil cylinder 8 to be tested.

[0034] like Figures 1-5As shown, the second fixing mechanism 4 also includes a mounting base 41, which is fixedly mounted on the upper surface of the test bench 7. A motor 42 is fixedly mounted on one end of the mounting base 41. A bidirectional lead screw 43 is fixedly connected to the output end of the motor 42. The bidirectional lead screw 43 is located inside the mounting base 41, and the end away from the output end of the motor 42 is rotatably connected to the inner wall of the mounting base 41. Lead screw sleeves 44 are threadedly connected to both ends of the bidirectional lead screw 43. A slide table 45 is fixedly connected to the upper surface of the lead screw sleeve 44. The slide table 45 is slidably connected to the mounting base 41. An arc-shaped support base 46 is fixedly mounted on the upper surface of the slide table 45.

[0035] By starting the motor 42, the bidirectional lead screw 43 is driven to rotate in the mounting base 41. The two lead screw sleeves 44 will move in opposite or opposite directions as the bidirectional lead screw 43 rotates, driving the slide table 45 and the arc-shaped support base 46 to move synchronously. This causes the two arc-shaped support bases 46 to approach each other from the inner sidewalls of both ends of the cylinder 8 under test and press against each other, thus achieving the fixation and support of the cylinder 8 under test.

[0036] By setting the first fixing mechanism 3 and the second fixing mechanism 4 to work together, it is possible to achieve stable fixing of oil cylinders of different lengths and inner diameters, thereby improving the versatility of the device and the stability of the oil cylinder 8 under test during the test.

[0037] like Figure 1 , Figure 3 , Figure 5 As shown, the fastening mechanism 2 also includes a fixing box 21, which is fixedly connected to one side of the upper end of the arc-shaped support base 46. One end of the fixing box 21 is threadedly connected to a screw 22, and a slider 23 is slidably connected inside the fixing box 21. One end of the screw 22 located inside the fixing box 21 is rotatably connected to the slider 23. A spring 24 is fixedly connected to the side of the slider 23 away from the screw 22. The end of the spring 24 away from the slider 23 is fixedly connected to a limiting ring 25. One end of the limiting ring 25 is slidably connected to the inner wall of the fixing box 21, and the other end is pressed against the sealing joint 9.

[0038] Rotating screw 22 can push slider 23 to slide. Slider 23 drives limit ring 25 to approach the oil port of the oil cylinder 8 under test through spring 24. Limit ring 25 presses the sealing joint 9 against the oil port of the oil cylinder 8 under test.

[0039] The limiting ring 25 works in conjunction with the spring 24 to adjust the clamping force through the screw 22, ensuring a tight connection between the sealing joint 9 and the oil port of the cylinder, preventing oil leakage from affecting the test accuracy. The spring 24 also helps to prevent excessive tightness from damaging the oil port or joint. The fixing box 21 is linked with the arc-shaped support 46, and the joint is tightened synchronously with the oil cylinder, simplifying the operation process. It can adapt to sealing joints 9 of different diameters and improve the adaptability of the device to oil circuit connections.

[0040] The working principle of this hydraulic testing device for oil cylinders:

[0041] During operation, the cylinder 8 to be tested is first placed on the test bench 7. The motor 42 of the second fixing mechanism 4 drives the bidirectional lead screw 43 to move the two arc-shaped support seats 46 from the inner walls of both ends of the cylinder towards each other and press against each other, thus achieving inner support and fixation of both ends of the cylinder. Then, the hydraulic cylinder 32 of the first fixing mechanism 3 drives the pressure block 34 to press against the outside of the cylinder 8 to be tested, forming a double fixation of inner support and outer pressing to prevent the cylinder 8 to be tested from shifting during the test. Subsequently, the screw 22 of the fastening mechanism 2 pushes the limit ring 25 to press and seal the sealing joint 9 with the oil inlet and outlet of the cylinder 8 to be tested, ensuring that the oil circuit is sealed. Finally, the hydraulic system is adjusted through the control panel 6 of the test cabinet 1, so that the oil in the oil tank enters the cylinder 8 to be tested through the oil pipe 10 and the sealing joint 9 to complete the test of the hydraulic performance of the cylinder 8 to be tested. After the test, the mechanisms reverse their actions to release the cylinder 8 to be tested.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A hydraulic testing device for a hydraulic cylinder, characterized in that, include: Test cabinet (1), the test cabinet (1) is fixedly installed on the test bench (7), the test cabinet (1) is equipped with a hydraulic system oil tank (5), the hydraulic system oil tank (5) is sealed to the oil inlet and oil outlet of the oil cylinder (8) to be tested through oil pipe (10) and sealing joint (9), and the test cabinet (1) is equipped with a control panel (6). The first fixing mechanism (3) is located on one side of the test cabinet (1). The first fixing mechanism (3) includes a pressure block (34), which is pressed against the oil cylinder (8) to be tested. The second fixing mechanism (4) is set on the test bench (7). The second fixing mechanism (4) includes two symmetrically arranged arc-shaped support seats (46). The two arc-shaped support seats (46) are respectively pressed against the inner sidewalls of the two ends of the oil cylinder (8) to be tested. Fastening mechanism (2) is located on one side of arc support seat (46). The fastening mechanism (2) includes a limiting ring (25), which is sleeved on the sealing joint (9) and presses the sealing joint (9) against the oil inlet and outlet of the oil cylinder (8) to be tested.

2. The hydraulic testing device for a hydraulic cylinder according to claim 1, characterized in that: The first fixing mechanism (3) also includes a hydraulic cylinder (32). The two ends of the cylinder body of the hydraulic cylinder (32) are fixedly installed on the first mounting plate (31) and the second mounting plate (33) respectively. One end of the first mounting plate (31) and the second mounting plate (33) is fixedly connected to the test cabinet (1). The pressure block (34) is fixedly installed on the output end of the hydraulic cylinder (32).

3. The hydraulic testing device for a hydraulic cylinder according to claim 1, characterized in that: The second fixing mechanism (4) also includes a mounting base (41), which is fixedly installed on the upper surface of the test bench (7). A motor (42) is fixedly installed at one end of the mounting base (41), and a bidirectional lead screw (43) is fixedly connected to the output end of the motor (42).

4. The hydraulic testing device for a hydraulic cylinder according to claim 3, characterized in that: The bidirectional lead screw (43) is located inside the mounting base (41), and one end away from the output end of the motor (42) is rotatably connected to the inner wall of the mounting base (41). Both ends of the bidirectional lead screw (43) are threaded with lead screw sleeves (44).

5. A hydraulic testing device for a hydraulic cylinder according to claim 4, characterized in that: A slide (45) is fixedly connected to the upper surface of the lead screw sleeve (44), the slide (45) is slidably connected to the mounting base (41), and the arc-shaped support base (46) is fixedly installed on the upper surface of the slide (45).

6. The hydraulic testing device for a hydraulic cylinder according to claim 1, characterized in that: The fastening mechanism (2) also includes a fixing box (21), which is fixedly connected to one side of the upper end of the arc-shaped support base (46), and a screw (22) is threadedly connected to one end of the fixing box (21).

7. A hydraulic testing device for a hydraulic cylinder according to claim 6, characterized in that: A slider (23) is slidably connected inside the fixed box (21). One end of the screw (22) located inside the fixed box (21) is rotatably connected to the slider (23). A spring (24) is fixedly connected to the side of the slider (23) away from the screw (22). The end of the spring (24) away from the slider (23) is fixedly connected to the limiting ring (25).

8. A hydraulic testing device for a hydraulic cylinder according to claim 7, characterized in that: One end of the limiting ring (25) is slidably connected to the inner wall of the fixed box (21), and the other end is abutted against the sealing joint (9).

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