A kind of brake shell air tightness detection device

Abstract

This utility model relates to the field of airtightness testing technology and discloses a brake housing airtightness testing device, including a water tank and a suspension fixing mechanism. The suspension fixing mechanism includes a base plate and a top plate. A tooling fixture is provided on the top of the base plate, and a sealing plate is installed on the bottom of the top plate. A lead screw is fixedly connected to the bottom of a first motor, and one end of the lead screw is threadedly connected to the inside of the top plate. A connecting air pipe is fixedly connected to one end of an air compressor. By placing the brake housing on the tooling fixture and simultaneously starting two first motors, the sealing plate and tooling fixture seal both ends of the brake housing. Then, the hydraulic cylinder is started to drive the lifting plate, crossbeam, and suspension fixing mechanism to move downward, so that the brake housing is completely immersed in water. Then, the air compressor is started to fill the inside of the brake housing with compressed air and maintain a set pressure, thereby observing whether air bubbles are generated around the housing to determine whether the housing is qualified.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically to a brake housing airtightness testing device. Background Technology

[0002] In automotive braking systems, the brake housing is a crucial structure housing core components such as brake shoes and brake pads, and its airtightness directly affects the safety performance of the braking system. For example, even a tiny leak in the housing of a hydraulic braking system can lead to insufficient brake fluid pressure, causing brake lag or failure, seriously threatening driving safety. Poor airtightness in the housing of a pneumatic braking system can cause compressed air leakage, increasing energy consumption and potentially reducing braking response speed. Therefore, rigorous airtightness testing of the brake housing is a core aspect of ensuring vehicle braking reliability. Traditionally, airtightness testing requires multiple devices, making the process cumbersome.

[0003] To address the aforementioned issues, we propose a brake housing airtightness testing device. Utility Model Content

[0004] To address the existing technical problems in brake housing airtightness testing, this utility model provides a brake housing airtightness testing device.

[0005] This utility model is achieved using the following technical solution: a brake housing airtightness testing device, comprising a water tank and a suspension fixing mechanism, wherein a hydraulic cylinder is fixedly connected to one side of the water tank, a lifting plate is fixedly connected to the top of the hydraulic cylinder, a crossbeam is fixedly connected to the top of the lifting plate, the suspension fixing mechanism is located at the bottom of one end of the crossbeam, the suspension fixing mechanism comprises a base plate and a top plate, a tooling fixture is provided on the top of the base plate, and a sealing plate is installed on the bottom of the top plate;

[0006] The top of the top plate is fixedly connected to a fixing plate, and two connecting plates are fixedly connected to both ends of the fixing plate. A first motor is installed on the top of the connecting plate, and a lead screw is fixedly connected to the bottom of the first motor. One end of the lead screw is threaded into the inside of the top plate. An equipment plate is fixedly connected to the inside of the top plate, and an air compressor is installed on the top of the equipment plate. A connecting air pipe is fixedly connected to one end of the air compressor. An insert air pipe is fixedly connected to the top center of the sealing plate, and one end of the connecting air pipe is connected to the insert air pipe through the internal cavity of the sealing plate.

[0007] Preferably, a second motor is provided at the top of the crossbeam, a first gear is fixedly connected to the bottom of the second motor, a second gear is meshed at one end of the first gear, and a rotating shaft is fixedly connected inside the second gear.

[0008] Preferably, the rotating shaft is rotatably connected inside the crossbeam, and the bottom of the rotating shaft is fixedly connected to the top of the fixing plate.

[0009] Preferably, multiple limiting rods are fixedly connected around the top perimeter of the base plate, and the top ends of the limiting rods are movably connected inside the top plate.

[0010] Preferably, a guide rod is fixedly connected to the top of the water storage tank, and the top of the guide rod is movably connected to the inside of the lifting plate.

[0011] Preferably, the top perimeter of the sealing plate is fixedly connected with multiple fixing screws, the top of the fixing screws penetrates the interior of the equipment plate, and the top of the fixing screws is fixedly connected to the bottom of the equipment plate by nuts.

[0012] Preferably, the sealing plate has a through hole machined in the center, the bottom of the insertable air tube is connected to the through hole, the bottom of the equipment plate has an insertion interface, and the top of the insertable air tube is inserted into the inside of the insertion interface.

[0013] Preferably, the bottom of the tooling fixture is fixedly connected with multiple positioning posts, the top of the base plate is machined with positioning holes, and the positioning posts are plugged into the positioning holes.

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

[0015] In use, this invention involves placing the brake housing on a tooling fixture, simultaneously starting two first motors. The first motors drive the lead screw to rotate, which in turn moves the top plate and sealing plate downwards, sealing both ends of the brake housing with the sealing plate and the tooling fixture. Then, the hydraulic cylinder is activated, causing the lifting plate, crossbeam, and suspension fixing mechanism to move downwards, completely immersing the brake housing in water. Finally, the air compressor is started, filling the brake housing with compressed air through connecting and inserting air pipes, maintaining a set pressure. This allows for observation of whether air bubbles are generated around the housing, thus determining whether the housing is qualified. The operation is simple and convenient.

[0016] When this utility model is in use, by starting the second motor, the second motor will drive the first gear to rotate, the first gear will drive the second gear to rotate, the second gear will drive the rotating shaft to rotate, the rotating shaft will drive the fixed plate to rotate, the fixed plate will drive the top plate and the bottom plate to rotate, thereby causing the brake housing to rotate slowly, so as to facilitate observation of whether there are bubbles generated around the housing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the specific structure of the suspension and fixing mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram showing the position and structure of the top plate and sealing plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the base plate and the tooling fixture of this utility model.

[0021] In the diagram: 1. Water tank; 2. Suspension and fixing mechanism; 3. Hydraulic cylinder; 4. Lifting plate; 5. Crossbeam; 6. Guide rod; 7. Base plate; 8. Tooling fixture; 9. Top plate; 10. Sealing plate; 11. Fixing plate; 12. Connecting plate; 13. First motor; 14. Lead screw; 15. Second motor; 16. First gear; 17. Second gear; 18. Rotating shaft; 19. Limiting rod; 20. Equipment plate; 21. Air compressor; 22. Connecting air pipe; 23. Fixing screw; 24. Inserting air pipe; 25. Insertion interface; 26. Positioning post; 27. Positioning hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example 1: Please refer to Figure 1 - Figure 4 This embodiment of a brake housing airtightness testing device includes a water tank 1 and a suspension fixing mechanism 2. A hydraulic cylinder 3 is fixedly connected to one side of the water tank 1, and a lifting plate 4 is fixedly connected to the top of the hydraulic cylinder 3. A crossbeam 5 is fixedly connected to the top of the lifting plate 4. The suspension fixing mechanism 2 is located at the bottom of one end of the crossbeam 5. The suspension fixing mechanism 2 includes a base plate 7 and a top plate 9. A tooling fixture 8 is provided on the top of the base plate 7, a sealing plate 10 is installed on the bottom of the top plate 9, and a fixing plate 11 is fixedly connected to the top of the top plate 9. The two ends of the fixing plate 11 are fixedly connected to the bottom of the top plate 9. The fixed connection has two connecting plates 12. A first motor 13 is set on the top of the connecting plate 12. A lead screw 14 is fixedly connected to the bottom of the first motor 13. One end of the lead screw 14 is threadedly connected to the inside of the top plate 9. An equipment plate 20 is fixedly connected inside the top plate 9. An air compressor 21 is set on the top of the equipment plate 20. A connecting air pipe 22 is fixedly connected to one end of the air compressor 21. An insert air pipe 24 is fixedly connected to the top center of the sealing plate 10. One end of the connecting air pipe 22 is connected to the insert air pipe 24 through the internal cavity of the sealing plate 10.

[0024] When the brake housing needs to be inspected, the tooling fixture 8 of the corresponding size is first placed on the top of the base plate 7, and the sealing plate 10 is installed at the bottom of the top plate 9. Then the brake housing is placed on the tooling fixture 8, and the two first motors 13 are started at the same time. The first motors 13 will drive the lead screw 14 to rotate, the lead screw 14 will drive the top plate 9 to move downward, and the top plate 9 will drive the sealing plate 10 to move downward. The sealing plate 10 and the tooling fixture 8 seal both ends of the brake housing. The surfaces of the sealing plate 10 and the tooling fixture 8 are provided with sealing rings to maintain the internal sealing of the brake housing.

[0025] Next, start hydraulic cylinder 3. Hydraulic cylinder 3 will drive lifting plate 4 to move downward. Lifting plate 4 will drive crossbeam 5 to move downward. Crossbeam 5 will drive suspension fixing mechanism 2 to move downward, so that suspension fixing mechanism 2 drives brake housing to be completely immersed in water. Then start air compressor 21. Air compressor 21 will fill the inside of brake housing with compressed air through connecting air pipe 22 and inserting air pipe 24 and maintain the set pressure. Observe whether there are bubbles generated around the housing. If bubbles are continuously generated on the surface of the housing, it is judged as "air leakage", and the position of the bubbles is recorded. If no bubbles are generated within 30 seconds or only 1-2 isolated bubbles are generated, it may be residual air, and it is judged as "qualified".

[0026] Furthermore, a second motor 15 is provided at the top of the crossbeam 5, a first gear 16 is fixedly connected to the bottom of the second motor 15, a second gear 17 is meshed at one end of the first gear 16, a rotating shaft 18 is fixedly connected inside the second gear 17, the rotating shaft 18 is rotatably connected inside the crossbeam 5, and the bottom of the rotating shaft 18 is fixedly connected to the top of the fixing plate 11.

[0027] When observing whether bubbles are generated around the shell, the second motor 15 is started. The second motor 15 will drive the first gear 16 to rotate, the first gear 16 will drive the second gear 17 to rotate, the second gear 17 will drive the rotating shaft 18 to rotate, the rotating shaft 18 will drive the fixed plate 11 to rotate, the fixed plate 11 will drive the top plate 9 and the bottom plate 7 to rotate, thereby causing the brake shell to rotate slowly, so as to facilitate observation of whether bubbles are generated around the shell. The water tank 1 is made of transparent glass around its perimeter for easy observation.

[0028] Furthermore, multiple limiting rods 19 are fixedly connected around the top of the base plate 7. The top of the limiting rods 19 is movably connected to the inside of the top plate 9. When the lead screw 14 rotates and drives the top plate 9 to move downward, the top plate 9 will move downward along the outside of the limiting rods 19, thereby limiting the up and down movement of the top plate 9.

[0029] Furthermore, a guide rod 6 is fixedly connected to the top of the water storage tank 1, and the top of the guide rod 6 is movably connected to the inside of the lifting plate 4. By setting the guide rod 6, the guide rod 6 will limit the movement of the lifting plate 4 and the crossbeam 5, so that the crossbeam 5 remains stable when it moves up and down.

[0030] Furthermore, multiple fixing screws 23 are fixedly connected around the top of the sealing plate 10. The top of the fixing screws 23 penetrates the interior of the equipment plate 20, and the top of the fixing screws 23 is fixedly connected to the bottom of the equipment plate 20 by nuts. When the sealing plate 10 needs to be installed, the multiple fixing screws 23 on the top of the sealing plate 10 are inserted into the interior of the equipment plate 20 respectively, and then fixed by nuts, which facilitates the replacement and installation of the sealing plate 10.

[0031] Furthermore, a through hole is machined in the center of the sealing plate 10, and the bottom of the insertion air pipe 24 is connected to the through hole. An insertion interface 25 is machined in the bottom of the equipment plate 20, and the top of the insertion air pipe 24 is inserted into the inside of the insertion interface 25. When the sealing plate 10 is installed and the fixing screw 23 is inserted into the inside of the equipment plate 20, the insertion air pipe 24 at the top of the sealing plate 10 will be inserted into the inside of the insertion interface 25. A sealing ring is provided inside the insertion interface 25, which facilitates the quick installation of the sealing plate 10. At the same time, the connecting air pipe 22 is connected to the insertion air pipe 24 through the inner cavity of the equipment plate 20, and is connected to the inside of the brake housing through the through hole at the bottom of the sealing plate 10.

[0032] Furthermore, the bottom of the tooling fixture 8 is fixedly connected with multiple positioning posts 26, and the top of the base plate 7 is machined with positioning holes 27. The positioning posts 26 are plugged into the inside of the positioning holes 27. By setting the positioning posts 26 and the positioning holes 27, it is convenient to quickly replace and install the tooling fixture 8.

[0033] Working principle: By placing the brake housing on the tooling fixture 8, and simultaneously starting the two first motors 13, the first motors 13 will drive the lead screw 14 to rotate. The lead screw 14 will drive the top plate 9 and the sealing plate 10 to move downward, so that the sealing plate 10 and the tooling fixture 8 seal both ends of the brake housing. Then, the hydraulic cylinder 3 will be started, which will drive the lifting plate 4, the crossbeam 5 and the suspension fixing mechanism 2 to move downward, so that the suspension fixing mechanism 2 will drive the brake housing to be completely immersed in water. Then, the air compressor 21 will be started, and the air compressor 21 will fill the inside of the brake housing with compressed air through the connecting air pipe 22 and the inserting air pipe 24 and maintain the set pressure. At this time, observe whether there are bubbles generated around the housing. If bubbles are continuously generated on the surface of the housing, it is judged as "air leakage", and the position of the bubbles is recorded. If no bubbles are generated within 30 seconds or only 1-2 isolated bubbles are generated, it may be residual air, and it is judged as "qualified".

[0034] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A brake housing airtightness testing device, comprising a water tank (1) and a suspension fixing mechanism (2), characterized in that, A hydraulic cylinder (3) is fixedly connected to one side of the water storage tank (1), a lifting plate (4) is fixedly connected to the top of the hydraulic cylinder (3), a crossbeam (5) is fixedly connected to the top of the lifting plate (4), and a suspension fixing mechanism (2) is located at the bottom of one end of the crossbeam (5). The suspension fixing mechanism (2) includes a bottom plate (7) and a top plate (9). A tooling fixture (8) is provided on the top of the bottom plate (7), and a sealing plate (10) is installed on the bottom of the top plate (9). Among them, the top plate (9) is fixedly connected to the top of the fixed plate (11), and the two ends of the fixed plate (11) are fixedly connected to two connecting plates (12). The top of the connecting plate (12) is provided with a first motor (13), and the bottom of the first motor (13) is fixedly connected to a lead screw (14). One end of the lead screw (14) is threadedly connected to the inside of the top plate (9). Secondly, an equipment plate (20) is fixedly connected inside the top plate (9), and an air compressor (21) is provided on the top of the equipment plate (20). One end of the air compressor (21) is fixedly connected to a connecting air pipe (22), and a plug-in air pipe (24) is fixedly connected to the top center of the sealing plate (10). One end of the connecting air pipe (22) is connected to the plug-in air pipe (24) through the internal cavity of the sealing plate (10).

2. The brake housing airtightness testing device according to claim 1, characterized in that, The top of the crossbeam (5) is provided with a second motor (15), the bottom of the second motor (15) is fixedly connected to a first gear (16), one end of the first gear (16) is meshed with a second gear (17), and the inside of the second gear (17) is fixedly connected to a rotating shaft (18).

3. The brake housing airtightness testing device according to claim 2, characterized in that, The rotating shaft (18) is rotatably connected inside the crossbeam (5), and the bottom of the rotating shaft (18) is fixedly connected to the top of the fixing plate (11).

4. The brake housing airtightness testing device according to claim 1, characterized in that, The top of the base plate (7) is fixedly connected with multiple limiting rods (19), and the top of the limiting rods (19) is movably connected to the inside of the top plate (9).

5. The brake housing airtightness testing device according to claim 1, characterized in that, The top of the water storage tank (1) is fixedly connected to a guide rod (6), and the top of the guide rod (6) is movably connected to the inside of the lifting plate (4).

6. The brake housing airtightness testing device according to claim 1, characterized in that, The top of the sealing plate (10) is fixedly connected with a plurality of fixing screws (23). The top of the fixing screws (23) penetrates the interior of the equipment plate (20), and the top of the fixing screws (23) is fixedly connected to the bottom of the equipment plate (20) by nuts.

7. The brake housing airtightness testing device according to claim 1, characterized in that, The sealing plate (10) has a through hole in its center. The bottom of the connecting air pipe (24) is connected to the through hole. The bottom of the equipment plate (20) has a plug-in interface (25). The top of the connecting air pipe (24) is plugged into the inside of the plug-in interface (25).

8. The brake housing airtightness testing device according to claim 1, characterized in that, The bottom of the tooling fixture (8) is fixedly connected with multiple positioning posts (26), and the top of the base plate (7) is machined with positioning holes (27). The positioning posts (26) are plugged into the inside of the positioning holes (27).

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