Tire airtightness detection device

Abstract

The utility model discloses a tire air tightness detection device which comprises a base and a tire, a lifting device and an oil tank are arranged on the base, a connecting rod is arranged on the lifting device, a connecting frame is arranged at the bottom end of the connecting rod, a first motor is arranged in the connecting frame, and a cross rod is connected to the output end of the first motor. According to the utility model, the lifting device is connected with the connecting rod, so that the tire and the mounting structure thereof are entirely immersed in the oil tank, the air tightness problem between the whole tire and a hub can be conveniently observed, and the air tightness problem between the tire and the hub can be conveniently observed through the driving of the first motor. Through the arrangement of the first vertical rod and the second vertical rod, the first vertical rod and the second vertical rod can circumferentially rotate in the radial direction of the tire, and the tire which is not driven by the second motor can circumferentially move in the axial direction, so that leakage points existing on the surface of the tire and between the tire and a hub can be observed in all directions, and the leakage points can be conveniently and accurately positioned; and the accuracy of detection data is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and in particular to a tire air tightness testing device. Background Technology

[0002] Tires are annular, elastic rubber products that are mounted on various vehicles or machinery and roll along the ground. They are typically mounted on metal rims, supporting the vehicle body, cushioning external impacts, ensuring contact with the road surface, and guaranteeing the vehicle's driving performance.

[0003] After production, tires need to undergo air tightness testing to check for air leaks, both within the tire itself and between the tire and the rim. A review of existing technologies reveals that most tire air tightness testing devices involve immersing a portion of the tire in water and then rotating it axially via a drive mechanism. However, in practical use, this technology makes it difficult to pinpoint the exact location of leaks because the tire bottom remains submerged, resulting in inadequate test results. Therefore, a new tire air tightness testing device is needed to meet these needs. Utility Model Content

[0004] The purpose of this invention is to provide a tire air tightness testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tire air tightness testing device, comprising a base and a tire, wherein a lifting device and an oil tank are provided on the base, a connecting rod is provided on the lifting device, a connecting frame is provided on the bottom end of the connecting rod, a first motor is provided inside the connecting frame, a crossbar is connected to the output end of the first motor, a first upright and a second upright are respectively connected to the bottom end of the crossbar, a screw is internally threaded on the first upright, a pressure plate is movably connected to one end of the screw, a conical seat is rotatably connected to one end of the second upright, the concave side of the tire hub is arranged on the conical seat, and the other side of the tire hub is arranged on the pressure plate side, a second motor is provided on the crossbar, a first helical gear is provided on the output shaft end of the second motor, a third upright is provided on the bottom end of the crossbar, a second helical gear is rotatably connected to one end of the third upright, the second helical gear meshes with the first helical gear, a drive wheel is connected to the second helical gear, and the drive wheel contacts the outer wall of the tire.

[0006] Preferably, the fuel tank is made of transparent acrylic material, and the distance between each pair of opposite inner walls is greater than the length of the crossbar and the diameter of the tire.

[0007] Preferably, the first upright has a threaded hole, and the screw is threaded into the threaded hole.

[0008] Preferably, a support shaft is rotatably connected inside the pressure plate. The support shaft has a T-shaped cross-section and is connected to a screw.

[0009] Preferably, a first T-shaped shaft is connected to the pressure plate, and a turntable is rotatably connected to the first T-shaped shaft, with the turntable in contact with the tire hub.

[0010] Preferably, a plurality of first ball bearings are movably connected inside the pressure plate, and the plurality of first ball bearings are evenly arranged in a circumferential shape between the pressure plate and the turntable.

[0011] Preferably, a second T-shaped shaft is connected to the second upright, and a tapered seat is rotatably connected to the second T-shaped shaft.

[0012] Preferably, a plurality of second ball bearings are movably connected inside the second upright, and the plurality of second ball bearings are evenly arranged in a circumferential shape between the second upright and the conical seat.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, the connection between the lifting device and the connecting rod allows the tire and its mounting structure to be fully immersed in the oil tank, facilitating observation of the tire as a whole and the airtightness between it and the wheel hub. Driven by the first motor, the first and second uprights can rotate radially around the tire, and the second motor drives the tire to rotate axially. This allows for comprehensive observation of the tire surface and any leaks between it and the wheel hub, and facilitates precise location of leaks, improving the accuracy of the detection data. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a tire air tightness testing device proposed in this utility model;

[0016] Figure 2 This is a side view cross-sectional structural diagram of a tire air tightness testing device proposed in this utility model;

[0017] Figure 3 This is a rear cross-sectional view of a tire air tightness testing device proposed in this utility model.

[0018] Figure 4 This utility model proposes a tire air tightness testing device. Figure 3 Enlarged structural diagram at point A in the middle;

[0019] Figure 5 This utility model proposes a tire air tightness testing device. Figure 3 Enlarged structural diagram at point B.

[0020] In the diagram: 1. Base; 2. Tire; 3. Lifting device; 4. Oil tank; 5. Connecting rod; 6. Connecting frame; 7. First motor; 8. Crossbar; 9. First upright; 10. Second upright; 11. Screw; 12. Pressure plate; 13. Conical seat; 14. Second motor; 15. First helical gear; 16. Third upright; 17. Second helical gear; 18. Drive wheel; 19. Threaded hole; 20. Support shaft; 21. First T-shaped shaft; 22. Turntable; 23. First ball bearing; 24. Second T-shaped shaft; 25. Second ball bearing. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 A tire air tightness testing device includes a base 1 and a tire 2. A lifting device 3 and an oil tank 4 are mounted on the base 1. A connecting rod 5 is mounted on the lifting device 3. A connecting frame 6 is mounted on the bottom end of the connecting rod 5. A first motor 7 is mounted inside the connecting frame 6. A crossbar 8 is connected to the output end of the first motor 7. A first upright 9 and a second upright 10 are respectively connected to the bottom end of the crossbar 8. A screw 11 is internally threaded onto the first upright 9. A pressure plate 12 is movably connected to one end of the screw 11. A rotatable connection is made to one end of the second upright 10. There is a conical seat 13, the concave side of the tire 2's hub is arranged on the conical seat 13, and the other side of the tire 2's hub is arranged on one side of the pressure plate 12. A second motor 14 is arranged on the crossbar 8, and a first helical gear 15 is arranged on the output shaft end of the second motor 14. A third upright 16 is arranged on the bottom end of the crossbar 8, and a second helical gear 17 is rotatably connected to one end of the third upright 16. The second helical gear 17 meshes with the first helical gear 15, and a drive wheel 18 is connected to the second helical gear 17. The drive wheel 18 contacts the outer wall of the tire 2.

[0023] In use, the oil tank 4 contains a certain amount of oil, with the oil level greater than the diameter of the tire 2. A highly transparent oil is preferable. Place the tire 2 and its rim recess on the conical seat 13. Rotate the screw 11 to make the pressure plate 12 fit against the rim, thus securing the tire 2 and rim against the conical seat 13. Then, drive the lifting device 3. The connecting rod 5 will lower the connecting frame 6, the first motor 7, the crossbar 8, the first upright 9, and the second upright 10, ensuring the tire 2 is completely submerged in the oil in the oil tank 4. At this point, a preliminary inspection can be conducted to check for air leakage between the tire 2 and the rim. If no leakage is found, the lifting device 3 can be driven upwards to remove the tire 2 from the oil. If air leakage is found, the first motor 7 is driven, which in turn drives the crossbar 8 to rotate. The crossbar 8 then drives the first upright 9 and the second upright 10 to rotate. Since the tire 2 and its hub are positioned between the first upright 9 and the second upright 10, the tire 2 generates radial circumferential motion. The second motor 14 is then driven, which in turn drives the first helical gear 15 to rotate. This causes the second helical gear 17 to mesh and drive the drive wheel 18 to rotate. The drive wheel 18 avoids contact with the tire 2, causing the tire 2 to rotate axially. This allows the tire 2 to rotate axially and radially within the oil body, making it easier to observe the leak point at the connection between the tire 2 and its hub and to accurately locate the leak point.

[0024] Specifically, in this embodiment, the oil tank 4 is made of transparent acrylic material, and the distance between each pair of opposite inner walls is greater than the length of the crossbar 8 and the diameter of the tire 2, making the airtightness test of the tire 2 in the oil body more intuitive and providing sufficient rotation space for the tire 2 and its mounting mechanism.

[0025] Specifically, in this embodiment, a threaded hole 19 is provided in the first upright rod 9, and the screw 11 is threadedly connected in the threaded hole 19 to achieve the locking effect between the screw 11 and the first upright rod 9, and at the same time achieve the effect of the screw 11 rotating to drive the pressure plate 12 to move.

[0026] Specifically, in this embodiment, a support shaft 20 is rotatably connected inside the pressure plate 12. The cross-section of the support shaft 20 is T-shaped. The support shaft 20 is connected to the screw 11, thereby improving the connection effect between the screw 11 and the pressure plate 12.

[0027] Specifically, in this embodiment, a first T-shaped shaft 21 is connected to the pressure plate 12, and a turntable 22 is rotatably connected to the first T-shaped shaft 21. The turntable 22 is in contact with the wheel hub of the tire 2. The rotatable effect of the turntable 22 allows the tire 2 and its wheel hub to rotate smoothly axially when fixed.

[0028] Specifically, in this embodiment, a plurality of first ball bearings 23 are movably connected inside the pressure plate 12. The plurality of first ball bearings 23 are evenly arranged in a circumferential shape between the pressure plate 12 and the turntable 22, thereby reducing the friction between the turntable 22 and the pressure plate 12 when the turntable 22 rotates with the tire 2 and its hub, and improving the smoothness of the rotation of the turntable 22 driven by the tire 2.

[0029] Specifically, in this embodiment, a second T-shaped shaft 24 is connected to the second upright 10, and a conical seat 13 is rotatably connected to the second T-shaped shaft 24. The rotatable effect of the conical seat 13 allows the axial rotation of the tire 2 and its hub to proceed smoothly.

[0030] Specifically, in this embodiment, a plurality of second ball bearings 25 are movably connected inside the second upright 10. The plurality of second ball bearings 25 are evenly arranged in a circumferential shape between the second upright 10 and the conical seat 13 to avoid direct contact between the conical seat 13 and the second upright 10, reduce the friction generated between the conical seat 13 and the second upright 10, and improve the smoothness of the tire 2 driving the conical seat 13 to rotate.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A tire air tightness testing device, comprising a base (1) and a tire (2), characterized in that: The base (1) is provided with a lifting device (3) and an oil tank (4). The lifting device (3) is provided with a connecting rod (5). A connecting frame (6) is provided at the bottom end of the connecting rod (5). A first motor (7) is provided inside the connecting frame (6). A crossbar (8) is connected to the output end of the first motor (7). A first upright (9) and a second upright (10) are respectively connected to the bottom end of the crossbar (8). A screw (11) is threaded into the first upright (9). A pressure plate (12) is movably connected to one end of the screw (11). A conical seat (13) is rotatably connected to one end of the second upright (10). The wheel The concave side of the tire (2) hub is arranged on the conical seat (13), and the other side of the tire (2) hub is arranged on the pressure plate (12). A second motor (14) is provided on the crossbar (8), and a first helical gear (15) is provided on the output shaft end of the second motor (14). A third upright (16) is provided on the bottom end of the crossbar (8), and a second helical gear (17) is rotatably connected to one end of the third upright (16). The second helical gear (17) meshes with the first helical gear (15), and a drive wheel (18) is connected to the second helical gear (17). The drive wheel (18) contacts the outer wall of the tire (2).

2. The tire air tightness testing device according to claim 1, characterized in that: The fuel tank (4) is made of transparent acrylic material, and the distance between each pair of opposite inner walls is greater than the length of the crossbar (8) and the diameter of the tire (2).

3. The tire air tightness testing device according to claim 1, characterized in that: The first upright (9) has a threaded hole (19) inside, and the screw (11) is threaded into the threaded hole (19).

4. The tire air tightness testing device according to claim 1, characterized in that: The pressure plate (12) is rotatably connected to a support shaft (20), the cross section of the support shaft (20) is T-shaped, and the support shaft (20) is connected to the screw (11).

5. The tire air tightness testing device according to claim 1, characterized in that: The pressure plate (12) is connected to a first T-shaped shaft (21), and a turntable (22) is rotatably connected to the first T-shaped shaft (21). The turntable (22) is in contact with the wheel hub of the tire (2).

6. The tire air tightness testing device according to claim 1, characterized in that: The pressure plate (12) is movably connected to a number of first balls (23), which are evenly arranged in a circular shape between the pressure plate (12) and the turntable (22).

7. The tire air tightness testing device according to claim 1, characterized in that: The second upright (10) is connected to a second T-shaped shaft (24), and the conical seat (13) is rotatably connected to the second T-shaped shaft (24).

8. The tire air tightness testing device according to claim 1, characterized in that: The second upright (10) is movably connected with a number of second ball bearings (25), which are evenly arranged in a circular shape between the second upright (10) and the conical seat (13).

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