Hydraulic cylinder air tightness testing machine fixture

Abstract

The application discloses a storage oil cylinder airtightness testing machine jig, relates to the technical field of storage oil cylinder airtightness detection, and comprises a support box body and a fixed support arranged in the support box body. One end of the fixed support is rotationally provided with a connecting frame connected with a storage oil cylinder assembly. The other end of the fixed support is provided with a fixed frame abutting against the storage oil cylinder assembly. The end of the storage oil cylinder assembly is provided with a sealing assembly and a connecting block connected with an air inlet at the end of the storage oil cylinder assembly. The connecting block is provided with an air pipe inserted into the air inlet. The top of the connecting block is provided with an air inlet head pressing against the connecting block. The air inlet head is in communication with the air pipe. The connecting frame and the fixed frame are matched to prevent the storage oil cylinder assembly from tilting and shaking. The connecting block and the air inlet head form a gas passage to pass test gas into the storage oil cylinder. Water is injected into the support box body to immerse the storage oil cylinder assembly in water. The airtightness of the storage oil cylinder assembly is detected. The problems of unstable storage oil cylinder fixing and low test precision caused by gas leakage in traditional tests are solved.

Description

Technical Field

[0001] This application relates to the field of oil reservoir airtightness testing technology, and in particular to an oil reservoir airtightness testing fixture. Background Technology

[0002] Oil reservoirs are widely used in many fields such as machinery manufacturing and the automotive industry. The airtightness of the oil reservoir directly affects the normal operation, safety, and service life of the equipment. For example, in hydraulic shock absorbers, the oil reservoir is a key component; poor airtightness can lead to a decline in shock absorber performance, affecting vehicle stability and comfort, and even endangering driving safety. Therefore, accurate and efficient airtightness testing of oil reservoirs is crucial.

[0003] Currently, common methods for testing the airtightness of oil reservoirs have many shortcomings. Some traditional methods involve manually connecting the testing equipment to the oil reservoir, then introducing gas into the reservoir and immersing it in water to observe whether bubbles are generated to determine airtightness.

[0004] Regarding the aforementioned technologies, the inventors believe that when testing the airtightness of the oil reservoir, the unstable fixing of the oil reservoir causes leakage of the injected gas, resulting in low test accuracy. Utility Model Content

[0005] The purpose of this application is to provide a fixture for testing the airtightness of an oil reservoir, so as to improve the problem that the oil reservoir is not fixed stably when testing the airtightness of the oil reservoir, which causes the injected gas to leak and results in low test accuracy.

[0006] The oil reservoir airtightness testing fixture provided in this application adopts the following technical solution:

[0007] A fixture for testing the air tightness of an oil reservoir cylinder includes a support housing and a fixed support disposed within the support housing. One end of the fixed support is rotatably connected to a connecting frame that is connected to an oil reservoir cylinder assembly. The other end of the fixed support is provided with a fixed frame that abuts against the outer wall of the oil reservoir cylinder assembly. The end of the oil reservoir cylinder assembly away from the fixed support is provided with a sealing component and a connecting block connected to an air inlet at the end of the oil reservoir cylinder assembly. A vent pipe inserted into the air inlet is disposed in the connecting block. An air inlet head pressing against the connecting block is disposed on the top of the connecting block. The air inlet head is connected to the vent pipe.

[0008] By adopting the above technical solution, the support box and the fixed support form a stable support frame. The connecting frame and the fixed frame work together to achieve reliable positioning and fixation of the oil reservoir assembly, preventing the oil reservoir assembly from tilting or shaking. The connecting block and the air inlet head form a sealed gas passage, ensuring that the test gas is accurately introduced into the oil reservoir. Water is injected into the support box to immerse the oil reservoir assembly in water, and the airtightness of the oil reservoir assembly is tested. The overall structure realizes a complete functional closed loop of the oil reservoir from installation and fixation to airtightness testing, which solves the problems of unstable oil reservoir fixation and gas leakage leading to low test accuracy in traditional testing, and provides a structural foundation and functional guarantee for airtightness testing.

[0009] Optionally, the outer side of the connecting frame is adapted to the connecting ring on the outer side of the oil reservoir assembly, the end of the connecting frame is provided with a connecting post, and the side wall of the fixed frame is provided with a relief groove corresponding to the connecting post, the bottom of the relief groove is rounded.

[0010] By adopting the above technical solution, the connecting ring of the connecting frame and the oil reservoir are adapted to achieve rapid positioning of the oil reservoir; the connecting column and the arc-shaped relief groove cooperate to provide space for the rotation of the connecting frame, and limit the radial displacement of the oil reservoir through the arc surface contact, thereby enhancing the stability of the oil reservoir after installation and avoiding sealing failure or test error caused by shaking during the test.

[0011] Optionally, the top of the fixing frame is provided with a limiting block that abuts against the oil reservoir assembly, and the limiting block has a wedge-shaped inclined surface on the side facing the oil reservoir assembly that corresponds to the circumferential sidewall of the oil reservoir assembly.

[0012] By adopting the above technical solution, the wedge-shaped inclined surface of the limiting block fits against the circumferential side wall of the oil reservoir, and the inclined surface guides the oil reservoir to apply lateral pressure, further restricting the axial and radial movement of the oil reservoir. It forms a multi-dimensional fixing system with the connecting frame and the fixing frame, which significantly improves the stability of the oil reservoir during testing and ensures the reliability of the sealing components and gas passage.

[0013] Optionally, the connecting block has a clearance hole on one side near the end of the oil reservoir assembly that corresponds to the end of the oil reservoir assembly.

[0014] By adopting the above technical solution, the clearance hole of the connecting block is adapted to the end structure of the oil reservoir, avoiding rigid collision between the two and causing damage to the components; at the same time, by tightly fitting to reduce gaps, the auxiliary sealing component improves the end sealing effect and reduces the risk of test gas leaking from a non-preset path.

[0015] Optionally, the sealing assembly includes a sealing ring one disposed in the gap of the oil reservoir assembly, the sealing ring one contacting the bottom of the connecting block, and a sealing ring two disposed at the air inlet of the oil reservoir assembly, which contacts the connecting block.

[0016] By adopting the above technical solution, sealing ring one and sealing ring two form a double seal: sealing ring one blocks the gap of the oil reservoir assembly to prevent gas from leaking from the end gap, and sealing ring two seals the contact surface between the air inlet and the connecting block to prevent test gas from leaking from the interface.

[0017] Optionally, a corresponding annular plate inside the oil reservoir assembly is provided on the side of the sealing ring near the connecting block, and the annular plate abuts against the connecting block.

[0018] By adopting the above technical solution, the ring plate provides axial support for the sealing ring 1, preventing the sealing ring 1 from being excessively deformed and failing due to excessive air pressure inside the oil reservoir, thus maintaining the stability of the sealing performance. At the same time, the ring plate abuts against the connecting block, strengthening the axial limit at the end of the oil reservoir, and indirectly improving the reliability of the sealing assembly and the gas passage.

[0019] Optionally, the top of the fixing frame is provided with a sliding groove, the limiting block is slidably connected to the inner side wall of the sliding groove, and the fixing frame is threaded with a fastening bolt that abuts against the side wall of the limiting block.

[0020] By adopting the above technical solution, the position of the limiting block can be adjusted by sliding along the slide groove, which can meet the fixing requirements of oil storage cylinders of different sizes, improve the versatility of the fixture, and lock the position of the limiting block with the fastening bolts to ensure that the fixing effect of the oil storage cylinder is stable after adjustment.

[0021] Optionally, the support box is provided with a drain pipe outlet connected to the side wall of the support box.

[0022] By adopting the above technical solution, the drain pipe can quickly discharge and replace water in the support box, and cleaning and maintenance can be completed without disassembling the fixture. This simplifies the post-test processing procedure, improves the ease of use and maintenance efficiency of the fixture, and ensures the continuity of testing.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The connecting ring of the connecting frame and the oil reservoir are adapted to achieve rapid positioning of the oil reservoir; the connecting column and the arc-shaped relief groove cooperate to provide space for the rotation of the connecting frame, and limit the radial displacement of the oil reservoir through the arc surface contact, thereby enhancing the stability of the oil reservoir after installation and avoiding sealing failure or test error caused by shaking during the test.

[0025] 2. The wedge-shaped inclined surface of the limiting block fits against the circumferential side wall of the oil reservoir, and the inclined surface guides the oil reservoir to apply lateral pressure, further restricting the axial and radial movement of the oil reservoir. Together with the connecting frame and the fixing frame, it forms a multi-dimensional fixing system, which significantly improves the stability of the oil reservoir during testing and ensures the reliability of the sealing components and gas passage.

[0026] 3. The sealing ring 1 and sealing ring 2 form a double seal: sealing ring 1 blocks the gap of the oil reservoir assembly to prevent gas from leaking from the end gap, and sealing ring 2 seals the contact surface between the air inlet and the connecting block to prevent test gas from leaking from the interface. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of the fixture for the oil reservoir airtightness testing machine;

[0028] Figure 2 This is a top view of the fixture for the oil reservoir airtightness testing machine;

[0029] Figure 3 This is an overall sectional view of the fixture for the oil reservoir airtightness testing machine.

[0030] In the diagram, 1. Support housing; 11. Drainage pipe outlet; 2. Fixed support; 3. Connecting frame; 31. Connecting column; 4. Oil reservoir assembly; 41. Connecting ring; 5. Fixed frame; 51. Relief groove; 52. Limiting block; 53. Wedge-shaped inclined surface; 54. Slide groove; 55. Fastening bolt; 6. Sealing assembly; 61. Sealing ring one; 62. Sealing ring two; 63. Ring plate; 7. Connecting block; 71. Vent pipe; 72. Relief hole; 8. Air inlet head. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail below.

[0032] The fixture for testing the airtightness of the oil reservoir cylinder is as follows: Figure 1 and Figure 2 The assembly includes a water-storing support housing 1 and a fixed support 2 bolted inside the support housing 1. A connecting frame 3 is rotatably connected to one end of the fixed support 2 via a rotating shaft. The outer side of the connecting frame 3 is adapted to the connecting ring 41 of the oil storage cylinder assembly 4. The other end is bolted to a fixed frame 5 that abuts against the outer wall of the oil storage cylinder assembly 4. A connecting block 7 and a sealing component 6 are provided at the end of the oil storage cylinder assembly 4 away from the fixed support 2. A vent pipe 71 is inserted through the connecting block 7 and inserted into the air inlet of the oil storage cylinder assembly 4. An air inlet head 8 connected to the vent pipe 71 is provided at the top. The air inlet head 8 is connected to the mounting bracket (not shown in the figure) on the driving end of the downward-facing driving cylinder. The air inlet head 8 is then sealed and connected to the delivery pipe (not shown in the figure) of the air pump. The air inlet head 8 is driven by the driving cylinder and presses towards the connecting block 7 and the vent pipe 71 to inject test gas into the oil storage cylinder assembly 4.

[0033] Reference Figure 1 , Figure 2 and Figure 3The connecting frame 3 has a cylindrical connecting post 31 at its end. The side wall of the fixing frame 5 has a relief groove 51 corresponding to the connecting post 31. The bottom of the relief groove 51 is arc-shaped. The connecting post 31 can rotate and be limited along the arc surface to fix the oil reservoir assembly 4. The top of the fixing frame 5 has a T-shaped sliding groove 54. A limit block 52 is slidably connected in the sliding groove 54. The side of the limit block 52 facing the oil reservoir assembly 4 has a wedge-shaped inclined surface 53 that abuts against the circumferential side wall of the oil reservoir assembly 4. The side wall of the fixing frame 5 is threaded with a fastening bolt 55 that abuts against the limit block 52 to fix the position of the limit block 52. The connecting block 7 has a relief hole 72 on the side near the oil reservoir assembly 4, which is adapted to the contour of the end of the oil reservoir.

[0034] Reference Figure 2 and Figure 3 The sealing assembly 6 includes a sealing ring 61 fitted into the gap of the oil reservoir assembly 4 and a sealing ring 62 located at the air inlet. The sealing ring 61 has an annular plate 63 on the side near the connecting block 7, and the annular plate 63 abuts against the bottom of the connecting block 7. The vent pipe 71 of the connecting block 7 passes through the air inlet of the oil reservoir. The sealing ring 62 is clamped between the connecting block 7 and the end of the oil reservoir. The side wall of the support box 1 is connected to a drain pipe 11 with a valve for draining water from the support box 1.

[0035] The implementation principle of this application embodiment is as follows:

[0036] During testing, first, the connecting ring 41 of the oil reservoir assembly 4 is fitted onto the connecting bracket 3. Then, the connecting bracket 3 is rotated so that the connecting post 31 is engaged in the arc-shaped clearance groove 51 of the fixing bracket 5, achieving initial positioning. The wedge-shaped inclined surface 53 of the limiting block 52 on the fixing bracket 5 fits against the circumferential side wall of the oil reservoir assembly 4, ensuring that the oil reservoir assembly 4 does not shift during testing. When the connecting block 7 is installed at the end of the oil reservoir assembly 4, the clearance hole 72 fits against the end of the oil reservoir assembly 4, the vent pipe 71 is inserted into the air inlet, and the sealing ring 61 is fitted against the ring plate 63 at the end of the oil reservoir assembly 4. The clamping seal, with ring plate 63, prevents sealing ring 61 from deforming and failing due to excessive internal air pressure. Sealing ring 62 is squeezed between the ends of connecting block 7 and oil reservoir assembly 4, blocking gas leakage from the periphery of the air inlet. The double sealing structure ensures that the test gas flows only through the vent pipe 71. After the air inlet head 8 is pressed down by external drive, it fits against the top of connecting block 7, and its internal air passage is connected to the vent pipe 71, forming a closed passage. After the test gas is introduced into the oil reservoir assembly 4, the air tightness can be judged by observing whether bubbles are generated in the water in the support box 1. After the test is completed, the drain pipe 11 valve is opened to drain the liquid. The entire process can be completed without disassembling the fixture. Through the cooperation of various components, the problems of unstable oil reservoir fixation and gas leakage leading to low test accuracy in traditional tests are solved.

[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fixture for testing the air tightness of an oil reservoir cylinder, characterized in that: The assembly includes a support housing (1) and a fixed support (2) provided in the support housing (1). One end of the fixed support (2) is rotatably provided with a connecting frame (3) connected to the oil reservoir assembly (4). The other end of the fixed support (2) is provided with a fixed frame (5) abutting against the outer wall of the oil reservoir assembly (4). The end of the oil reservoir assembly (4) away from the fixed support (2) is provided with a sealing component (6) and a connecting block (7) connected to the air inlet at the end of the oil reservoir assembly (4). The connecting block (7) is provided with a vent pipe (71) inserted into the air inlet. The top of the connecting block (7) is provided with an air inlet head (8) pressing against the connecting block (7). The air inlet head (8) is connected to the vent pipe (71).

2. The fixture for testing the air tightness of an oil reservoir cylinder according to claim 1, characterized in that: The outer side of the connecting frame (3) is adapted to the connecting ring (41) on the outer side of the oil reservoir assembly (4). The end of the connecting frame (3) is provided with a connecting post (31). The side wall of the fixing frame (5) is provided with a relief groove (51) corresponding to the connecting post (31). The bottom of the relief groove (51) is rounded.

3. The fixture for testing the air tightness of an oil storage cylinder according to claim 2, characterized in that: The top of the fixed frame (5) is provided with a limiting block (52) that abuts against the oil reservoir assembly (4). The limiting block (52) has a wedge-shaped inclined surface (53) on the side facing the oil reservoir assembly (4) that corresponds to the circumferential side wall of the oil reservoir assembly (4).

4. The fixture for testing the air tightness of an oil storage cylinder according to claim 3, characterized in that: The connecting block (7) has a clearance hole (72) on one side near the end of the oil reservoir assembly (4) that corresponds to the end of the oil reservoir assembly (4).

5. The fixture for testing the airtightness of an oil reservoir cylinder according to claim 4, characterized in that: The sealing assembly (6) includes a sealing ring one (61) disposed in the gap of the oil reservoir assembly (4), the sealing ring one (61) being in contact with the bottom of the connecting block (7), and a sealing ring two (62) being disposed at the air inlet of the oil reservoir assembly (4) being in contact with the connecting block (7).

6. The fixture for testing the airtightness of an oil storage cylinder according to claim 5, characterized in that: The sealing ring (61) is provided with a corresponding ring plate (63) inside the oil reservoir assembly (4) on the side near the connecting block (7), and the ring plate (63) abuts against the connecting block (7).

7. The fixture for testing the airtightness of an oil reservoir cylinder according to claim 6, characterized in that: The top of the fixing frame (5) is provided with a sliding groove (54), the limiting block (52) is slidably connected to the inner side wall of the sliding groove (54), and the fixing frame (5) is threaded with a fastening bolt (55) that abuts against the side wall of the limiting block (52).

8. The fixture for testing the airtightness of an oil reservoir cylinder according to claim 7, characterized in that: The support box (1) is provided with a drain pipe (11) connected to the side wall of the support box (1).

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