Tire expanding device for automobile maintenance
By designing a purely mechanical tire expansion device for automotive repair, and utilizing the mechanical transmission structure of the base and the expansion hook, the high cost and complex operation of traditional tire expansion machines are solved, enabling ordinary users to perform simple, safe, and low-cost tire expansion operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2026-04-07
AI Technical Summary
Existing tire expanders are expensive, require professional knowledge and skills to operate, and are large in size and have high maintenance costs, making them difficult for ordinary users to accept and use.
A purely mechanical tire expansion device for automobile repair was designed. It adopts a base, tire expansion hook and roller structure. The tire expansion operation is performed by manually rotating the screw to drive the tire expansion hook, avoiding dependence on compressed air pipelines and complex power systems.
It lowers the barrier to entry, allowing ordinary users to easily and safely perform tire expansion operations, reducing maintenance costs, and is compatible with tires of different sizes and types.
Smart Images
Figure CN224089973U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive repair technology, and more specifically to an automotive tire expansion device. Background Technology
[0002] With social development and the continuous improvement of people's living standards, there are more and more vehicles of all sizes, and the phenomenon of tire punctures occurs from time to time. Since replacing new tires is expensive, it is necessary to repair punctured tires. In the process of tire repair, it is necessary to expand the tire on both sides and then repair the inside of the tire. Therefore, there is a need to provide a car repair tire expansion device.
[0003] Existing tire expanders mainly consist of a frame, expander hooks, lifting devices, and compressed air pipelines. However, these tire expanders are expensive and require specialized knowledge and skills to operate. They must be operated by professionals, which may pose some difficulties for ordinary users. Furthermore, tire expanders are large pieces of equipment that require regular inspection and maintenance, which may result in maintenance costs and operational inconvenience for users. Utility Model Content
[0004] The purpose of this invention is to provide a tire expansion device for automobile repair, which avoids the high cost problem of traditional tire expansion machines and lowers the operating threshold.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A tire expander for automotive repair includes a base. A mounting seat is fixedly connected to one side of the base. First connecting plates are symmetrically arranged on the mounting seat. A first rotating shaft is rotatably arranged between the two first connecting plates. A first rotating frame is fixedly sleeved on the first rotating shaft. A first tire expander hook is fixedly connected to one end of the first rotating frame. A mounting plate is provided on the other side of the base. A guide rod is fixedly connected between the mounting plate and the base. A movable seat is slidably sleeved on the guide rod. A screw is rotatably arranged between the mounting plate and the base. The movable seat is threadedly connected to the screw. Second connecting plates are symmetrically arranged on the movable seat. A second rotating shaft is rotatably arranged between the two second connecting plates. A second rotating frame is fixedly sleeved on the second rotating shaft. A second tire expander hook is fixedly connected to one end of the second rotating frame.
[0007] Furthermore, both the first and second expansion hooks have spherical ends.
[0008] Furthermore, both ends of the base are provided with placement components; the placement components include two connecting frames symmetrically arranged on the top of the base, the connecting frames are inclined, and a first roller is rotatably arranged between the tops of the two connecting frames.
[0009] Furthermore, a protective limiting baffle is rotatably connected to the top outer side of the connecting frame via a damping pivot.
[0010] Furthermore, a groove is provided on the top of the base, and multiple sets of second rollers are rotatably arranged in the groove.
[0011] Furthermore, one end of the screw passes through the mounting plate and is fixedly connected to a rotating head.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] This application achieves the tire expansion function through the mechanical transmission structure on both sides of the base, without relying on compressed air pipelines or complex power systems, thus avoiding the high cost problem of traditional tire expanders. Ordinary users can manually rotate the screw to drive the second tire expander hook to move, reducing the operating threshold. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;
[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .
[0016] 1. Base; 101. Groove; 2. Mounting seat; 3. First connecting plate; 4. First rotating shaft; 5. First rotating frame; 6. First tire expander hook; 7. Mounting plate; 8. Guide rod; 9. Moving seat; 10. Screw; 11. Second connecting plate; 12. Second rotating shaft; 13. Second rotating frame; 14. Second tire expander hook; 15. Connecting frame; 16. First roller; 17. Damping rotating shaft; 18. Protective limit baffle; 19. Second roller; 20. Rotating head. Detailed Implementation
[0017] like Figure 1 and Figure 2As shown, an automotive tire expander includes a base 1. A mounting base 2 is fixedly connected to one side of the base 1. First connecting plates 3 are symmetrically arranged on the mounting base 2. A first rotating shaft 4 is rotatably arranged between the two first connecting plates 3. A first rotating frame 5 is fixedly sleeved on the first rotating shaft 4. A first tire expander hook 6 is fixedly connected to one end of the first rotating frame 5. A mounting plate 7 is provided on the other side of the base 1. A guide rod 8 is fixedly connected between the mounting plate 7 and the base 1. A movable seat 9 is slidably sleeved on the guide rod 8. A screw 10 is rotatably arranged between the mounting plate 7 and the base 1. The movable seat 9 is threadedly connected to the screw 10. Second connecting plates 11 are symmetrically arranged on the movable seat 9. A second rotating shaft 12 is rotatably arranged between the two second connecting plates 11. A second rotating frame 13 is fixedly sleeved on the second rotating shaft 12. A second tire expander hook 14 is fixedly connected to one end of the second rotating frame 13.
[0018] The ends of the first tire expander hook 6 and the second tire expander hook 14 are both spherical structures; this reduces the contact stress between the tire expander hook and the inner wall of the tire during the tire expander process and avoids sharp edges from scratching the tire rubber.
[0019] Both ends of the base 1 are provided with placement components; each placement component includes two connecting frames 15 symmetrically arranged on the top of the base 1, the connecting frames 15 being inclined, and a first roller 16 rotatably disposed between the tops of the two connecting frames 15; the first roller 16 at the top can support the tire edge, so that the tire maintains stable radial positioning during the tire expansion process. At the same time, the rotational characteristics of the first roller 16 allow the tire to rotate slightly, which facilitates the adjustment of the clamping position of the tire expander hook and improves operational flexibility.
[0020] The top outer side of the connecting frame 15 is rotatably connected to a protective limiting baffle 18 via a damping shaft 17. When the tire is placed on the first roller 16, if the tire expanding hook 14 slides and separates from the tire when the rotating screw 10 drives the moving seat 9 and the second tire expanding hook 14 to move outward, the tire is likely to bounce up and pop out to both sides. At this time, the protective limiting baffle 18 limits the tire to prevent it from causing injury to the operator and enhances the safety of the device.
[0021] The top of the base 1 is provided with a groove 101, and multiple sets of second rollers 19 are rotatably arranged in the groove 101. The multiple sets of second rollers 19 form a support surface for the bottom of the tire. When the tire needs to move laterally (such as adjusting the position of the tire expansion), the rolling friction of the second rollers 19 is much less than the sliding friction, which can easily push the tire to slide on the base 1, reducing the physical burden on the operator.
[0022] One end of the screw 10 passes through the mounting plate 7 and is fixedly connected to the rotating head 20.
[0023] Working principle:
[0024] The tire to be repaired is placed on the base 1. The bottom of the tire is supported by the second roller 19 in the groove 101, and the two ends are supported on the first roller 16. The protective limit baffle 18 is rotated to limit the axial movement of the tire.
[0025] Rotate the first tire expander hook 6, and the end of the first tire expander hook 6 will be inserted into the tire bead position on one side of the tire (the junction of the tire and the rim); manually rotate the rotating head 20 at the end of the screw 10, and the rotation of the screw 10 will drive the moving seat 9 to move horizontally along the guide rod 8, and then drive the second tire expander hook 14 to move through the second rotating frame 13, and the end of the second tire expander hook 14 will be inserted into the tire bead position on the other side of the tire; as the second tire expander hook 14 moves, the tire expander hooks 14 on both sides will apply a reverse pulling force to the tire bead, forcing the inner wall of the tire to expand and expose the damaged area for repair.
[0026] This utility model features a purely mechanical structure that requires no external power or air source. The operation steps are simple (only rotating the screw and adjusting the hook position are needed), and no professional training is required to operate it, breaking the limitation of traditional tire expanders that rely on professional personnel. It is compatible with tires of different sizes and types, improving the device's versatility and safety.
[0027] 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 preferred examples and are not intended to limit the 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A tire expander for automobile repair, characterized in that: The system includes a base (1), a mounting base (2) fixedly connected to one side of the base (1), first connecting plates (3) symmetrically arranged on the mounting base (2), a first rotating shaft (4) rotatably arranged between the two first connecting plates (3), a first rotating frame (5) fixedly sleeved on the first rotating shaft (4), a first expanding hook (6) fixedly connected to one end of the first rotating frame (5), a mounting plate (7) provided on the other side of the base (1), and a guide rod (8) fixedly connected between the mounting plate (7) and the base (1). A movable seat (9) is slidably sleeved on the guide rod (8). A screw (10) is rotatably arranged between the mounting plate (7) and the base (1). The movable seat (9) is threadedly connected to the screw (10). A second connecting plate (11) is symmetrically arranged on the movable seat (9). A second rotating shaft (12) is rotatably arranged between the two second connecting plates (11). A second rotating frame (13) is fixedly sleeved on the second rotating shaft (12). A second expansion hook (14) is fixedly connected to one end of the second rotating frame (13).
2. The vehicle tire expansion device as described in claim 1, characterized in that: The ends of the first expansion hook (6) and the second expansion hook (14) are both spherical structures.
3. The vehicle tire expansion device as described in claim 1, characterized in that: Both ends of the base (1) are provided with placement components; the placement components include two connecting frames (15) symmetrically arranged on the top of the base (1), the connecting frames (15) are inclined, and a first roller (16) is rotatably arranged between the tops of the two connecting frames (15).
4. The vehicle tire expansion device as described in claim 3, characterized in that: The top outer side of the connecting frame (15) is rotatably connected to a protective limit baffle (18) via a damping shaft (17).
5. The vehicle tire expansion device as described in claim 1, characterized in that: The top of the base (1) is provided with a groove (101), and multiple sets of second rollers (19) are rotatably arranged in the groove (101).
6. The vehicle tire expansion device as described in claim 1, characterized in that: One end of the screw (10) passes through the mounting plate (7) and is fixedly connected to a rotating head (20).