Expansion bolt for vehicle repair

Abstract

The utility model discloses a vehicle repair expansion bolt, and relates to the technical field of expansion bolts. The expansion bolt comprises a bolt body, an expansion rod part is fixedly installed at the end of the bolt body, an expansion head part is fixedly connected to the end of the expansion rod part, an expansion sleeve is arranged on the surface of the expansion rod part in a sleeved mode, and a plurality of protruding assemblies are arranged on the surface of the expansion sleeve. According to the expansion bolt, after the expansion rod part and the expansion head part at the end part of the bolt body and the expansion sleeve on the surface of the expansion rod part are inserted into the mounting hole, the bulge component on the surface of the expansion sleeve is attached to the inner wall of the mounting hole, so that the expansion sleeve is tightly inserted into the mounting hole; the bolt body drives the expansion rod part and the expansion head part to move, so that the expansion head part moves relative to the expansion sleeve, the expansion sleeve is expanded, fixing is achieved, the buoyancy protrusion assembly is compressed, friction force is remarkably improved, and reliable connection between the bolt body and a mounting hole is ensured.

Description

Technical Field

[0001] This utility model relates to the field of expansion bolt technology, specifically to an expansion bolt for vehicle repair. Background Technology

[0002] Expansion bolts are key tools for fixing components. Traditional expansion bolts rely on the expansion head to expand the expansion tube to generate tension for fastening.

[0003] The expansion tube has a smooth surface, which results in less friction between it and the inner wall of the mounting hole after expansion. This affects the reliability of the bolt-hole connection. Such an unreliable connection may cause the bolt to gradually loosen, leading to component displacement or detachment, and posing a safety hazard.

[0004] Therefore, a vehicle repair expansion bolt is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a vehicle repair expansion bolt in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] An expansion bolt for vehicle repair includes a bolt body, an expansion rod fixedly installed at the end of the bolt body, and an expansion head fixedly connected to the end of the expansion rod. An expansion sleeve is sleeved on the surface of the expansion rod, and the surface of the expansion sleeve is provided with several sets of protruding components to increase the friction between the expansion sleeve and the mounting hole.

[0008] Furthermore, the bolt body includes a bolt shank, the expansion rod is fixedly installed at the end of the bolt shank, a nut is threaded onto the surface of the bolt shank, and a spring washer and an annular washer are fitted onto the surface of the bolt shank.

[0009] Furthermore, the expansion sleeve has multiple sets of expansion grooves and arc grooves on its surface, a fracture groove on its surface, and an inclined surface on the inner wall of the expansion sleeve at its bottom end, the inclined surface corresponding to the expansion head.

[0010] Furthermore, the expansion sleeve is made of a plastically deformable metal material.

[0011] Furthermore, the protruding component includes a groove formed on the surface of the expansion sleeve, and a frame is fixedly installed on the surface of the expansion sleeve and at a position corresponding to the groove. A mounting plate is inserted into the groove and the frame, and a rubber block is fixedly installed on the end face of the mounting plate.

[0012] Furthermore, the rubber block is made of elastic rubber, and the surface of the rubber block is patterned.

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

[0014] After the expansion rod and expansion head at the end of the bolt body, along with the expansion sleeve on the surface of the expansion rod, are inserted into the mounting hole, the protruding component on the surface of the expansion sleeve fits against the inner wall of the mounting hole, achieving a tight connection between the expansion sleeve and the mounting hole. The bolt body drives the expansion rod and expansion head to move, causing the expansion head to move relative to the expansion sleeve, thereby expanding the expansion sleeve. This achieves fixation and compresses the buoyancy protruding component, significantly increasing friction and ensuring a reliable connection between the bolt body and the mounting hole. Attached Figure Description

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

[0016] Figure 2 This is an exploded view of this utility model;

[0017] Figure 3 This is a partial exploded view of the protruding component on the surface of the expansion sleeve of this utility model;

[0018] Reference numerals: 1. Bolt body; 101. Bolt shank; 102. Nut; 103. Spring washer; 104. Annular washer; 2. Expansion rod; 3. Expansion head; 4. Expansion sleeve; 41. Expansion groove; 42. Arc groove; 43. Fracture groove; 44. Inclined surface; 5. Protruding assembly; 501. Groove; 502. Frame; 503. Mounting plate; 504. Rubber block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1 to 3 As shown, a vehicle repair expansion bolt includes a bolt body 1, an expansion rod 2 fixedly mounted at the end of the bolt body 1, and an expansion head 3 fixedly connected to the end of the expansion rod 2; as shown... Figure 1 and Figure 2 As shown, specifically, the bolt body 1 includes a bolt shank 101, an expansion rod 2 is fixedly installed at the end of the bolt shank 101, a nut 102 is threaded onto the surface of the bolt shank 101, and a spring washer 103 and an annular washer 104 are fitted onto the surface of the bolt shank 101.

[0024] More specifically, a spring washer 103 and an annular washer 104 are fitted onto the surface of the bolt shank 101. The spring washer 103 provides elastic compensation to prevent the nut 102 from loosening, while the annular washer 104 increases the sealing and stability of the connection and enhances the overall fastening effect.

[0025] An expansion sleeve 4 is fitted onto the surface of the expansion rod 2; such as Figure 2 and Figure 3 As shown, specifically, the surface of the expansion sleeve 4 is provided with multiple sets of expansion grooves 41 and arc grooves 42, the surface of the expansion sleeve 4 is provided with a fracture groove 43, and the inner wall of the expansion sleeve 4 and the surface at its bottom end are provided with a slope 44, which corresponds to the expansion head 3.

[0026] More specifically, the expansion sleeve 4 has multiple sets of expansion grooves 41 and arc-shaped grooves 42 on its surface. When the inner wall of the expansion sleeve 4 is subjected to pressure by the expansion head 3 and is forced open, it provides deformation space, making it easier to fit the inner wall of the mounting hole. The fracture groove 43 on the surface of the expansion sleeve 4 can break along the fracture groove 43 when it is over-expanded, preventing damage caused by over-expansion. The inclined surface 44 corresponds to the expansion head 3. When the expansion rod 2 pulls the expansion head 3 to move, the inclined surface 44 guides the expansion sleeve 4 to expand evenly, improving the stability of the connection.

[0027] The surface of the expansion sleeve 4 is provided with several sets of protruding components 5 to increase the friction between the expansion sleeve 4 and the mounting hole; such as Figure 2 and Figure 3 As shown, specifically, the protruding component 5 includes a groove 501 formed on the surface of the expansion sleeve 4, and a frame 502 is fixedly installed on the surface of the expansion sleeve 4 and at a position corresponding to the groove 501. An installation plate 503 is inserted into the groove 501 and the frame 502, and a rubber block 504 is fixedly installed on the end face of the installation plate 503.

[0028] More specifically, when the expansion sleeve 4 is opened and comes into contact with the inner wall of the mounting hole, the rubber block 504 fits tightly against the inner wall of the hole, further increasing the friction and preventing loosening.

[0029] In some practical applications, the rubber block 504 is made of elastic rubber, and the surface of the rubber block 504 is patterned.

[0030] More specifically, the rubber block 504 is made of elastic rubber and has good elasticity. During the expansion sleeve 4 expansion process, the rubber block 504 comes into contact with the mounting hole and undergoes elastic deformation, closely fitting the irregular surface of the inner wall of the mounting hole, increasing the contact area and friction.

[0031] In some practical applications, the expansion sleeve 4 is made of a plastically deformable metal material.

[0032] More specifically, the expansion sleeve 4, after plastic deformation, can maintain its stable shape after expansion and will not loosen due to elastic recoil, ensuring a long-term reliable fixing effect.

[0033] In summary: After the expansion rod 2 and expansion head 3 at the end of the bolt body 1 and the expansion sleeve 4 on the surface of the expansion rod 2 are inserted into the mounting hole, the protruding component 5 on the surface of the expansion sleeve 4 fits against the inner wall of the mounting hole, achieving a tight connection between the expansion sleeve 4 and the mounting hole. The bolt body 1 drives the expansion rod 2 and expansion head 3 to move, causing the expansion head 3 to move relative to the expansion sleeve 4, thereby expanding the expansion sleeve 4, achieving fixation and compressing the buoyancy protruding component 5, significantly improving friction, and ensuring a reliable connection between the bolt body 1 and the mounting hole.

[0034] 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 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vehicle repair expansion bolt, characterised in that, Includes a bolt body (1), an expansion rod (2) is fixedly installed at the end of the bolt body (1), and an expansion head (3) is fixedly connected at the end of the expansion rod (2). An expansion sleeve (4) is sleeved on the surface of the expansion rod (2), and several sets of protruding components (5) are provided on the surface of the expansion sleeve (4) to increase the friction between the expansion sleeve (4) and the mounting hole.

2. A vehicle repair expansion bolt according to claim 1 wherein, The bolt body (1) includes a bolt shank (101), the expansion rod (2) is fixedly installed at the end of the bolt shank (101), the surface of the bolt shank (101) is threaded with a nut (102), and the surface of the bolt shank (101) is fitted with a spring washer (103) and an annular washer (104).

3. The vehicle repair expansion bolt of claim 1, wherein The expansion sleeve (4) has multiple sets of expansion grooves (41) and arc grooves (42) on its surface. The expansion sleeve (4) has a fracture groove (43) on its surface. The inner wall of the expansion sleeve (4) and the surface at its bottom end have a slope (44) which corresponds to the expansion head (3).

4. The vehicle repair expansion bolt of claim 1, wherein, The expansion sleeve (4) is made of a plastically deformable metal material.

5. The vehicle repair expansion bolt of claim 1, wherein, The protruding component (5) includes a groove (501) formed on the surface of the expansion sleeve (4), and a frame (502) is fixedly installed on the surface of the expansion sleeve (4) and at the corresponding position of the groove (501). An installation plate (503) is inserted into the groove (501) and the frame (502), and a rubber block (504) is fixedly installed on the end face of the installation plate (503).

6. A vehicle repair expansion bolt according to claim 5 wherein, The rubber block (504) is made of elastic rubber, and the surface of the rubber block (504) is patterned.

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