Brake disc fixing hub with long service life

Abstract

The utility model designs a long-service-life brake disc fixing hub and a matched brake disc for use, aiming at solving the problem that potential safety hazards exist after long-term use due to the fact that a screw is subjected to radial shearing force due to the fact that an existing fixed band brake structure and a hub are impacted during braking. According to the long-service-life brake disc fixing hub and the brake disc, the advancing direction of a bicycle serves as the reference direction when the hub is installed, and a brake disc matching structure and a brake disc fixing structure are arranged at the left end of the fixing hub; the brake disc is fixed on the brake disc fixing structure of the fixed hub through a bolt; and the through hole of the brake disc is in concave-convex fit with the brake disc matching structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bicycle accessories, and specifically relates to a long-life brake disc fixing hub. BACKGROUND

[0002] The hub, commonly known as "hub barrel", is the barrel outside the shaft that connects the spokes, and is usually called shaft skin. According to the different arrangement methods of the number of spokes, there are generally 3 and 5 coding methods. The hub has iron hub and aluminum hub, and the hub system of a bicycle includes a shaft, a bearing, a hub, etc. The two ends of the hub are usually placed with the riding direction as the front, the left end is connected to the brake structure, and the right end is connected to the transmission structure. For the brake structure, different bicycles are explained, including back brake bicycles, dead fly bicycles and single fly bicycles. The pedals of the back brake bicycle cannot be reversed, and the pedals can be braked by counterclockwise pedaling half a circle. The wheels and pedals of the dead fly bicycle are always in a linked state, and the pedals can be braked by reverse pedaling. The pedals can be reversed when the vehicle body is stationary, while the single fly bicycle only has a forward driving function.

[0003] Usually, shared bicycles and public bicycles are single fly bicycles, and the brake structure of the bicycle is usually a brake structure. During the brake braking process, an instantaneous impact force is generated, and the impact force on the brake structure will produce a certain rotation, thereby causing a radial shear force on the screw that fixes the brake structure and the hub, which can easily cause the screw to loosen or break, and there is a safety hazard after long-term use. Therefore, a structure needs to be designed to reduce this radial shear force. SUMMARY

[0004] The utility model discloses a long-life brake disc fixing hub and a brake disc used in conjunction, which are designed to solve the problem that the existing fixed brake structure and hub are impacted during braking, thereby causing a radial shear force on the screw, and there is a safety hazard after long-term use.

[0005] A long-life brake disc fixing hub, comprising: a fixed hub and a brake disc;

[0006] The forward direction of the bicycle is taken as the reference direction when the hub is installed, and the left end of the fixed hub is provided with a brake disc cooperation structure and a brake disc fixing structure;

[0007] The brake disc is fixed on the brake disc fixing structure of the fixed hub through bolts;

[0008] The through hole of the brake disc is in concave-convex cooperation with the brake disc cooperation structure.

[0009] As a preferred, the axial thickness of the brake disc cooperation structure of the fixed hub is equal to 2.5mm;

[0010] The brake disc cooperation structure shaft is a circular ring, and at least three grooves are arranged on the circular ring, the width of the groove is 4.2mm, the groove depth is greater than or equal to 2mm, and the position of the groove is rotationally symmetrical about the center;

[0011] Three protrusions are arranged on the inner hole of the brake disc, the position of the protrusion is matched with the groove of the brake disc cooperation structure and cooperates.

[0012] As preferred, the axial thickness of the brake disc cooperation structure of the fixed hub is greater than or equal to 2mm;

[0013] The brake disc cooperation structure shaft is a circular ring, and at least three protrusions are arranged on the circular ring, the protrusion height is greater than or equal to 2mm, and the position of the protrusion is rotationally symmetrical about the center;

[0014] Three grooves are arranged on the inner hole of the brake disc, and the position of the groove is matched with the protrusion of the brake disc cooperation structure and cooperates;

[0015] The groove is arranged at the midpoint of the arc line connected by adjacent mounting screw holes of the brake disc.

[0016] As preferred, the brake disc fixing structure is attached to the spoke shaft mounting hole plate of the hub, and the mounting hole on the brake disc fixing structure simultaneously penetrates the spoke shaft mounting hole plate.

[0017] The brake disc cooperation structure groove protrusion cooperation provides an additional receiving point for the brake disc, thereby reducing the radial shear force of the bolt for fixing the brake disc, and thereby improving the service life of the brake disc. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The fixed hub sectional view provided by the utility model is provided;

[0019] Figure 2 The common hub perspective view is provided;

[0020] Figure 3 The brake disc top view used by the utility model is provided;

[0021] Figure 4 The fixed hub left view provided by the utility model is provided;

[0022] In the drawing: 1, fixed hub, 2, brake disc, 3, spoke shaft mounting hole, 4, brake disc cooperation structure, 5, mounting hole on the brake disc fixing structure, 6, brake disc cooperation structure, 7, groove, a, traditional hub. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be further concretely explained below by specific embodiments and in combination with the drawings. EMBODIMENT

[0024] As Figure 1 , Figure 3 and Figure 4 shown, the

[0025] A long-life brake disc fixing hub, comprising: a fixing hub 1 and a brake disc 2;

[0026] With the forward direction of the bicycle as the reference direction when the hub is installed, the left end of the fixing hub is provided with a brake disc matching structure 6 and a brake disc fixing structure 4;

[0027] The brake disc is fixed on the brake disc fixing structure of the fixing hub through bolts;

[0028] The through hole of the brake disc is matched with the brake disc matching structure in concave-convex mode.

[0029] The axial thickness of the brake disc matching structure of the fixing hub is equal to 2.5 mm;

[0030] The shaft of the brake disc matching structure 6 is a circular ring, and at least three grooves 7 are arranged on the circular ring, the width of the groove is 4.2 mm, the groove depth is greater than or equal to 2 mm, and the position of the groove is rotationally symmetrical about the center;

[0031] Three protrusions are arranged on the inner hole of the brake disc, and the positions of the protrusions are matched with the grooves of the brake disc matching structure and work in cooperation.

[0032] As Figure 2 shown, the connecting part for fixing the brake disc in the conventional hub a is spaced apart from the spoke shaft mounting hole plate. In the embodiment, the brake disc fixing structure is attached to the spoke shaft mounting hole plate of the hub, and the mounting hole 5 on the brake disc fixing structure penetrates the spoke shaft mounting hole plate at the same time. The number 3 is the spoke shaft mounting hole. In the embodiment, the hub is integrally formed with the conventional hub. Embodiment

[0033] The difference between the embodiment and embodiment 1 is that the concave-convex structure is opposite; the axial thickness of the brake disc matching structure of the fixing hub is equal to 2 mm;

[0034] The shaft of the brake disc matching structure is a circular ring, and at least three protrusions are arranged on the circular ring, the height of the protrusion is equal to 2 mm, and the position of the protrusion is rotationally symmetrical about the center;

[0035] Three grooves are arranged on the inner hole of the brake disc, and the positions of the grooves are matched with the protrusions of the brake disc matching structure and work in cooperation;

[0036] The grooves are arranged at the midpoint of the arc connected by the adjacent mounting screw holes of the brake disc.

[0037] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and, while certain modifications are discussed, it is desired to be protected in accordance with the spirit and scope of the application. Therefore, the application is not limited to the specific embodiments shown and described, but only by the scope of the appended claims, unless otherwise specified.

Claims

1. A long life brake disc fixed hub, characterized in that, The utility model relates to a fixed hub and brake disc, comprising: A fixed hub and brake disc, comprising: The left end of the fixed hub is provided with a brake disc matching structure and a brake disc fixing structure, with the direction of the bicycle forward as the reference direction when the hub is installed; The brake disc is fixed on the brake disc fixing structure of the fixed hub through bolts; The through hole of the brake disc is matched with the brake disc matching structure; 2. A long life brake disc retaining hub according to claim 1 wherein, The axial thickness of the brake disc matching structure of the fixed hub is greater than or equal to 2mm; The brake disc matching structure is a circular ring, and at least three grooves are arranged on the circular ring, with the groove depth greater than or equal to 2mm, and the positions of the grooves rotationally symmetrical about the center; Three protrusions are arranged on the inner hole of the brake disc, with the positions of the protrusions matched with the grooves of the brake disc matching structure and working in cooperation.

3. A long life brake disc retaining hub according to claim 1 wherein, The axial thickness of the brake disc matching structure of the fixed hub is greater than or equal to 2mm; The brake disc matching structure is a circular ring, and at least three protrusions are arranged on the circular ring, with the protrusion height greater than or equal to 2mm, and the positions of the protrusions rotationally symmetrical about the center; Three grooves are arranged on the inner hole of the brake disc, with the positions of the grooves matched with the protrusions of the brake disc matching structure and working in cooperation; The grooves are arranged at the midpoints of the arcs formed by the adjacent mounting screw holes of the brake disc.

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