Fixing structure of hub

Abstract

The utility model discloses a hub fixing structure which comprises a hub and a tire, a mounting seat is arranged at the center of the tire, the hub is mounted at the center of the mounting seat through a fixing structure, a plurality of positioning holes are formed in the mounting seat, a plurality of mounting holes corresponding to the positioning holes are formed in the hub, and bolts are arranged in the mounting holes. The bolt is in interference fit with the mounting hole, the bolt sequentially penetrates through the hub, the mounting seat and the nut, and the hub and the rim tire assembly are firmly mounted by adopting the specially-made high-strength bolt, the spherical spring washer and the high-strength nut. The mounting surface of the high-strength bolt and the hub is subjected to knurling straight grain treatment, and the bolt is pressed into the hub by an oil press, so that the bolt is in interference fit with a mounting hole, the strength is increased, the bolt does not rotate along with the nut when the nut is tightened, and the mounting is convenient.

Description

Technical Field

[0001] The utility model relates to a fixing structure of a wheel hub. Background Art

[0002] The wheel hub is a cylindrical metal part with the inner profile of the tire supported by the tire, and the center is mounted on the shaft. It is also called a wheel rim, a steel ring, a wheel, or a tire bell. There are many types of wheel hubs according to diameter, width, molding method, and material. The tire is the only contact point between the vehicle and the ground, and it has the important tasks of supporting the weight of the vehicle, providing traction, and providing a comfortable ride experience. The tire is usually composed of a carcass, a tread, a sidewall, a tread pattern, and a tire cushion. The material and structure of the tire will vary depending on the purpose and driving conditions, such as ordinary passenger tires, high-performance tires, off-road tires, etc.

[0003] The wheel hub is usually installed on the mounting seat at the center of the tire. The general type used is bolts and nuts or bolts and locking nuts. The bolts and nuts are in contact with each other on both planes, and the structure is simple. Under high-strength requirements and frequent vibration environments, it is easy to cause the nuts to loosen and the bolts to fatigue and break. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and provide a hub fixing structure.

[0005] A wheel hub fixing structure includes a wheel hub and a tire. A mounting seat is provided at the center of the tire. The wheel hub is installed at the center of the mounting seat through the fixing structure. The mounting seat is provided with a plurality of positioning holes. The wheel hub is provided with a plurality of mounting holes corresponding to the positioning holes. Bolts are provided inside the mounting holes. The bolts are interference fit with the mounting holes. The bolts pass through the wheel hub, the mounting seat and the nut in sequence.

[0006] In order to enhance the friction between the bolt and the inner wall of the mounting hole, the surface of the bolt and the inner wall of the mounting hole are provided with straight knurling.

[0007] In order to prevent loosening, a spring washer is provided between the nut and the mounting seat, and a portion of the spring washer is embedded in the gap between the bolt and the inner wall of the mounting hole.

[0008] In order to increase the contact area between the spring washer and the inner wall of the mounting hole, the surface where the spring washer connects to the inner wall of the mounting hole is a convex spherical structure, and the surface where the inner wall of the mounting hole connects to the spring washer is a concave spherical structure.

[0009] Beneficial effects: Compared with the prior art, the mounting surfaces of the spherical spring washer and the rim are both spherical, and the connection is tight. At the same time, the spherical spring washer has a slight leveling effect. After the nut is tightened, under the action of the spherical spring washer, the force on the bolt is more uniform, and the anti-loosening performance is better. This structure can also be used for other forms of connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of a fixing structure of a wheel hub;

[0011] Figure 2 It is a schematic diagram of the bolt;

[0012] Figure 3 It is a schematic diagram of the spring pad;

[0013] In the figure, 1, tire, 2, mounting seat, 3, wheel hub, 4, bolt, 5, spring washer, 6, straight knurling. DETAILED DESCRIPTION

[0014] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0015] like Figure 1-3 As shown, tire 1, mounting seat 2, wheel hub 3, bolt 4, spring washer 5, straight knurling 6;

[0016] A wheel hub fixing structure includes a wheel hub 3 and a tire 1. A mounting seat 2 is provided at the center of the tire 1. The wheel hub 3 is installed at the center of the mounting seat 2 through a fixing structure. The mounting seat 2 is provided with a plurality of positioning holes. The wheel hub 3 is provided with a plurality of mounting holes corresponding to the positioning holes. Bolts 4 are provided inside the mounting holes. The bolts 4 are interference fit with the mounting holes. The bolts 4 pass through the wheel hub 3, the mounting seat 2, the spring washer 5, and the nut in sequence.

[0017] In this embodiment, the surface of the bolt 4 and the inner wall of the mounting hole are provided with straight knurling 6. Specifically, the bolt 4 is pressed into the wheel hub 3 by a hydraulic press, and an interference fit is formed, which not only increases the strength but also prevents the bolt 4 from rotating when the nut is tightened, thereby facilitating installation.

[0018] In this embodiment, a spring washer 5 is provided between the nut and the mounting seat 2, and a portion of the spring washer 5 is embedded in the gap between the bolt 4 and the inner wall of the mounting hole. The surface of the spring washer 5 connected to the inner wall of the mounting hole is a convex spherical structure, and the surface of the inner wall of the mounting hole connected to the spring washer 5 is a concave spherical structure. Specifically, the mounting surface of the spherical spring washer 5 and the rim are both spherical, and the connection is tight. At the same time, the spherical spring washer 5 has a slight leveling effect. After the nut is tightened, under the action of the spherical spring washer 5, the force on the bolt 4 is more uniform, and the anti-loosening performance is better.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel hub fixing structure, characterized in that: It includes a wheel hub and a tire, a mounting seat is provided at the center of the tire, the wheel hub is installed at the center of the mounting seat through a fixing structure, a plurality of positioning holes are provided on the mounting seat, a plurality of mounting holes corresponding to the positioning holes are provided on the wheel hub, bolts are provided inside the mounting holes, the bolts and the mounting holes are interference fit, the bolts pass through the wheel hub, the mounting seat and the nut in sequence, a spring washer is provided between the nut and the mounting seat, the spring washer is partially embedded in the gap between the bolt and the inner wall of the mounting hole, the surface of the spring washer connected to the inner wall of the mounting hole is a convex spherical structure, and the surface of the inner wall of the mounting hole connected to the spring washer is a concave spherical structure.

2. A wheel hub fixing structure according to claim 1, characterized in that: The surface of the bolt and the inner wall of the mounting hole are provided with straight knurling.

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