Air tightness detection device for air spring

Abstract

The utility model belongs to the field of air spring quality inspection, and particularly relates to an air spring air tightness detection device which comprises a pressure gauge, the bottom end of the pressure gauge is fixedly connected with an external threaded rod, a communicating pipe is inserted into the external threaded rod, the bottom of the external threaded rod is provided with a connecting assembly, and the connecting assembly is connected with the pressure gauge. A limiting assembly is arranged at the bottom of the connecting assembly, and a connector is fixedly connected to the bottom of the communicating pipe. The communication pipe is inserted into the external threaded rod, the communication pipe is limited through the two first pressing blocks at the moment, the communication pipe is stably inserted into the external threaded rod, then the communication pipe is further limited through the two second pressing blocks, and therefore the situation that the communication pipe is pulled to be separated from the external threaded rod is avoided; therefore, the communicating pipe is stably inserted into the external threaded rod, and the pressure gauge can accurately detect the air tightness of the air spring through the communicating pipe and the connector.

Description

Technical Field

[0001] This utility model relates to the field of air spring quality inspection, specifically an air spring air tightness testing device. Background Technology

[0002] An air spring is made by injecting compressed air into a flexible, sealed container. The spring's elasticity is achieved through the pressure and compressibility of the air. This type of spring does not directly provide force or support loads; instead, it relies on the properties of the internal compressed air to achieve shock absorption and cushioning. After production, air springs require airtightness testing to ensure safe use. Currently, this is typically done by using a pressure gauge to test the current pressure of the air spring, then retesting it after a period of inactivity. The leakage rate is then measured based on the pressure change to determine if the airtightness meets the standards.

[0003] Currently, when testing the pressure of an air spring using a pressure gauge, a connector compatible with the air spring nozzle needs to be connected to the pressure gauge. This connector is typically inserted directly into a communication hole on the pressure gauge. However, during actual measurement, operators may accidentally pull the connector, causing leakage between the connector and the pressure gauge, thus affecting the accuracy of the air spring's airtightness test. Therefore, to address this problem, an air spring airtightness testing device is proposed. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and avoid the problem of accuracy in air spring air tightness testing, this utility model proposes an air spring air tightness testing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an air spring air tightness testing device, including a pressure gauge, an external threaded rod fixedly connected to the bottom end of the pressure gauge, a connecting tube inserted into the inside of the external threaded rod, a connecting component provided at the bottom of the external threaded rod, a limiting component provided at the bottom of the connecting component, a connector fixedly connected to the bottom of the connecting tube, and the connecting component including a nut threadedly connected to the surface of the external threaded rod, and a connecting sleeve snapped onto the bottom surface of the nut;

[0006] The limiting component includes two bottom grooves on the left and right sides of the bottom end of the connecting sleeve. A fixing block is fixedly connected to the side of the bottom groove near the center of the connecting sleeve. A screw is rotatably connected to the side of the fixing block near the edge of the connecting sleeve. An anti-slip groove is formed on the surface of the screw near the edge of the connecting sleeve. An internal thread block is threadedly connected to the surface of the screw. Telescopic rods are fixedly connected to both the front and rear sides of the internal thread block near the end of the connecting pipe. A pressure spring is fixedly connected to the middle of the internal thread block near the end of the connecting pipe. A pressure block one is fixedly connected to the end of the telescopic rod away from the internal thread block. A vertical anti-slip block is fixedly connected to the end of the pressure block one away from the telescopic rod. A rotating rod is rotatably connected to the bottom end of the pressure block one. A pressure block two is rotatably connected to the bottom end of the rotating rod. A horizontal anti-slip block is fixedly connected to the side of the pressure block two near the connecting pipe. An arc-shaped spring is fixedly connected to the bottom end of the pressure block one.

[0007] Preferably, the internal part of the external threaded rod has a connecting groove, and the connecting pipe is inserted into the internal part of the connecting groove. The connecting pipe is connected to the connecting groove and the connector respectively. The operator can select a connector that is compatible with the air spring nozzle, so as to use the pressure gauge, the connecting pipe and the connector to detect the pressure of the air spring.

[0008] Preferably, a central groove is provided at the center of the bottom of the connecting sleeve, and the top wall of the connecting sleeve is adapted to fit against the bottom end of the external thread rod.

[0009] Preferably, the internal threaded block is slidably connected inside the bottom groove, and the end of the screw away from the fixed block is rotatably connected inside the bottom groove. The screw can rotate stably between the fixed block and the inner wall of the bottom groove, and rotating the screw can drive the internal threaded block to slide inside the bottom groove.

[0010] Preferably, the end of the pressure spring away from the internal threaded block is fixedly connected to the surface of the first pressure block, and the end of the arc spring away from the first pressure block is fixedly connected to the top of the second pressure block. The rebound force of the arc spring will pull the second pressure block to rotate, so that the second pressure block is close to the surface of the connecting pipe.

[0011] Preferably, the first pressure block is fitted to the surface of the connecting pipe by means of a vertical anti-slip block, and the second pressure block is fitted to the surface of the connecting pipe by means of a horizontal anti-slip block. The connecting pipe can be limited by the two pressure blocks on the left and right, and then the connecting pipe can be limited by the two pressure blocks on the left and right, so as to prevent the connecting pipe from being pulled and detached from the external thread rod.

[0012] The advantages of this utility model are:

[0013] This invention involves inserting a connecting tube into the interior of an externally threaded rod. Two pressure blocks then constrain the connecting tube, ensuring its stable insertion within the rod. Two more pressure blocks further constrain the tube, preventing it from being pulled away from the rod. This stable insertion allows the pressure gauge to accurately test the airtightness of the air spring via the connecting tube and connector. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic cross-sectional view of the bottom surface of the external threaded rod of this utility model;

[0018] Figure 4 This is a bottom view of the connecting sleeve structure of this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Pressure gauge; 2. External threaded rod; 31. Connecting pipe; 32. Connector; 4. Connecting assembly; 41. Nut; 42. Connecting sleeve; 5. Fixing assembly; 51. Bottom groove; 521. Fixing block; 522. Screw; 523. Anti-slip groove; 53. Internal threaded block; 541. Telescopic rod; 542. Pressure spring; 551. Pressure block one; 552. Vertical anti-slip block; 56. Rotating rod; 571. Pressure block two; 572. Horizontal anti-slip block; 58. Curved spring. Detailed Implementation

[0021] 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.

[0022] The following is in conjunction with the appendix Figure 1 —5 provides further detailed information about this application.

[0023] This application discloses an air spring air tightness testing device. (Refer to...) Figure 1 - Figure 3 An air spring air tightness testing device includes a pressure gauge 1, an external threaded rod 2 fixedly connected to the bottom end of the pressure gauge 1, a connecting pipe 31 inserted inside the external threaded rod 2, a connecting component 4 at the bottom of the external threaded rod 2, a limiting component 5 at the bottom of the connecting component 4, a connector 32 fixedly connected to the bottom of the connecting pipe 31, a connecting groove opened inside the external threaded rod 2, the connecting pipe 31 inserted into the connecting groove, the connecting pipe 31 communicating with the connecting groove and the connector 32 respectively, and the operator can select a connector 32 that is compatible with the air spring nozzle, thereby using the pressure gauge 1, the connecting pipe 31 and the connector 32 to test the pressure of the air spring. The connecting component 4 includes a nut 41 threadedly connected to the surface of the external threaded rod 2, a connecting sleeve 42 snapped onto the bottom surface of the nut 41, a central groove opened at the center of the bottom of the connecting sleeve 42, and the top wall of the connecting sleeve 42 fitting and adhering to the bottom end of the external threaded rod 2.

[0024] Reference Figure 3 - Figure 5The limiting component 5 includes two bottom grooves 51 on the left and right sides of the bottom end of the connecting sleeve 42. A fixing block 521 is fixedly connected to the side of the bottom groove 51 near the center of the connecting sleeve 42. A screw 522 is rotatably connected to the side of the fixing block 521 near the edge of the connecting sleeve 42. An anti-slip groove 523 is formed on the surface of the screw 522 near the edge of the connecting sleeve 42. An internal thread block 53 is threadedly connected to the surface of the screw 522. The internal thread block 53 is slidably connected inside the bottom groove 51. The end of the screw 522 away from the fixing block 521 rotates... The screw 522 is dynamically connected inside the bottom groove 51 and can rotate stably between the fixed block 521 and the inner wall of the bottom groove 51. Rotating the screw 522 can drive the internal thread block 53 to slide inside the bottom groove 51. The front and rear sides of the internal thread block 53 near the connecting pipe 31 are fixedly connected to the telescopic rod 541. The middle of the internal thread block 53 near the connecting pipe 31 is fixedly connected to the pressure spring 542. The end of the telescopic rod 541 away from the internal thread block 53 is fixedly connected to the pressure block 551. The pressure block 551 is away from the telescopic rod. One end of 541 is fixedly connected to a vertical anti-slip block 552. The bottom end of the first pressure block 551 is rotatably connected to a rotating rod 56. The bottom end of the rotating rod 56 is rotatably connected to a second pressure block 571. The side of the second pressure block 571 closest to the connecting pipe 31 is fixedly connected to a horizontal anti-slip block 572. The first pressure block 551 is fitted to the surface of the connecting pipe 31 through the vertical anti-slip block 552, and the second pressure block 571 is fitted to the surface of the connecting pipe 31 through the horizontal anti-slip block 572. The connecting pipe 31 can be limited by the two pressure blocks 551 on the left and right. Then, the connecting tube 31 is restricted by the two pressure blocks 571 on the left and right to prevent the connecting tube 31 from being pulled away from the external threaded rod 2. The bottom end of the pressure block 551 is fixedly connected to the arc spring 58. The end of the pressure spring 542 away from the internal threaded block 53 is fixedly connected to the surface of the pressure block 551. The end of the arc spring 58 away from the pressure block 551 is fixedly connected to the top of the pressure block 571. The rebound force of the arc spring 58 will pull the pressure block 571 to rotate, so that the pressure block 571 is close to the surface of the connecting tube 31.

[0025] Working principle: The operator inserts the connecting tube 31 into the bottom of the external threaded rod 2. Then, the operator holds the anti-slip groove 523 of the screw 522 and rotates the screw 522. When the screw 522 rotates, it will drive the threaded internal thread block 53 to slide in the bottom groove 51 towards the connecting tube 31. At this time, the internal thread block 53 will drive the pressure block 551 to move through the telescopic rod 541 until the pressure block 551 moves and abuts against the surface of the connecting tube 31. At this time, the pressure block 551 will be tightly abutted against the surface of the connecting tube 31 under the action of the pressure spring 542. At this time, the pressure block 551 increases the friction between itself and the connecting tube 31 through the vertical anti-slip block 552. At this time, the two pressure blocks 551 on the left and right will stably limit the connecting tube 31.

[0026] While the pressure block 551 abuts against the surface of the connecting tube 31, the elastic force of the arc spring 58 pulls the pressure block 571 closer to the connecting tube 31. At this time, the two pressure blocks 571 on the left and right also fit tightly and stably against the connecting tube 31. That is, the two pressure blocks 571 on the left and right also increase the friction between the connecting tube 31 through the transverse anti-slip block 572. At this time, the two pressure blocks 571 on the left and right also stably limit the side of the connecting tube 31 away from the connecting sleeve 42. The connecting tube 31 is stably inserted into the inside of the external thread rod 2 by the two pressure blocks 551 on the left and right and the two pressure blocks 571 on the right.

[0027] The operator then selects the appropriate connector 32 and connecting pipe 31, and connects connector 32 to the air nozzle corresponding to the air spring. At this time, the pressure gauge 1 is read to detect the current pressure of the air spring. After standing for at least 24 hours, the pressure gauge 1 is read again. The pressure difference measured on both sides can be calculated, and the leakage rate of the air spring can be calculated, thereby achieving the purpose of testing the air tightness of the air spring.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An air spring air tightness testing device, characterized in that: The device includes a pressure gauge (1), with an external threaded rod (2) fixedly connected to the bottom end of the pressure gauge (1). A connecting tube (31) is inserted into the inside of the external threaded rod (2), and a connector (32) is fixedly connected to the bottom of the connecting tube (31). A connecting component (4) is provided at the bottom of the external threaded rod (2), and a limiting component (5) is provided at the bottom of the connecting component (4). The connecting component (4) includes a nut (41) threaded onto the surface of the external threaded rod (2), and a connecting sleeve (42) is snapped onto the bottom surface of the nut (41). The limiting component (5) includes two bottom grooves (51) on the left and right sides of the bottom end of the connecting sleeve (42). A fixing block (521) is fixedly connected to the side of the bottom groove (51) near the center of the connecting sleeve (42). A screw (522) is rotatably connected to the side of the fixing block (521) near the edge of the connecting sleeve (42). An anti-slip groove (523) is formed on the surface of the screw (522) near the edge of the connecting sleeve (42). An internal thread block (53) is threadedly connected to the surface of the screw (522). Telescopic rods (541) are fixedly connected to both the front and rear sides of the internal thread block (53) near the end of the connecting pipe (31). 3) A pressure spring (542) is fixedly connected to the middle of one end of the connecting pipe (31). A pressure block (551) is fixedly connected to the end of the telescopic rod (541) away from the internal thread block (53). A vertical anti-slip block (552) is fixedly connected to the end of the pressure block (551) away from the telescopic rod (541). A rotating rod (56) is rotatably connected to the bottom end of the pressure block (551). A pressure block (571) is rotatably connected to the bottom end of the rotating rod (56). A horizontal anti-slip block (572) is fixedly connected to the side of the pressure block (571) near the connecting pipe (31). An arc spring (58) is fixedly connected to the bottom end of the pressure block (551).

2. The air tightness testing device for an air spring according to claim 1, characterized in that: The external threaded rod (2) has a connecting groove inside, and the connecting pipe (31) is inserted into the connecting groove. The connecting pipe (31) is connected to the connecting groove and the connector (32) respectively.

3. The air tightness testing device for an air spring according to claim 1, characterized in that: The bottom center of the connecting sleeve (42) has a central groove, and the top wall of the connecting sleeve (42) is adapted to fit the bottom end of the external thread rod (2).

4. The air tightness testing device for an air spring according to claim 1, characterized in that: The internal threaded block (53) is slidably connected inside the bottom groove (51), and the end of the screw (522) away from the fixed block (521) is rotatably connected inside the bottom groove (51).

5. The air spring airtightness testing device according to claim 1, characterized in that: The end of the pressure spring (542) away from the internal thread block (53) is fixedly connected to the surface of the first pressure block (551), and the end of the arc spring (58) away from the first pressure block (551) is fixedly connected to the top of the second pressure block (571).

6. The air tightness testing device for an air spring according to claim 1, characterized in that: The first pressure block (551) is fitted to the surface of the connecting pipe (31) by means of a vertical anti-slip block (552), and the second pressure block (571) is fitted to the surface of the connecting pipe (31) by means of a horizontal anti-slip block (572).

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