CN2126165U

CN2126165U - Integral axle casing of bicycle front axle and rear axle

Info

Publication number: CN2126165U
Application number: CN 92205835
Authority: CN
Inventors: 常广全
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-04
Filing date: 1992-04-04
Publication date: 1992-12-30

Abstract

The utility model relates to an integral type shaft casing for the front shaft and the back shaft of a bicycle, belonging to the part of the bicycle. The scheme is especially proposed for overcoming the defects that in the prior art, the accumulated errors of a shaft hub which is combined by multiple pieces are great to make the bicycle ridden strenuously, the materials and the man hours of the integral casting or forging type shaft casing are consumed greatly. The utility model is characterized in that the shaft cylinder, the strip disc, and the bearing seat of the integral type shaft casing for the front shaft and the back shaft of a bicycle are of an integral form, and are made by the combined mode of rolling press and stamping. The shaft cylinder thereof forms a curved cylinder shape; the strip disc is a double-layer bent metal disc; the bearing seat is a shallow cylindrical hole. The utility model adopts the plastic deformation of metal flow and less cutting processing technology, and thus has the characteristics of metal saving, man hours saving, large rigidity, large strength, and good accuracy.

Description

Integral axle casing of bicycle front axle and rear axle

The utility model belongs to the parts in addition on the bicycle, and it relates to the novel axle housing structure of part in addition.

Bicycle is a modal walking-replacing tool in China's people's lives, also can be used as exerciser certainly.Formed polytype by different needs, as hand-held design, scale-up version, mountain, racing car type etc., their common requirements all be to ride brisk, laborsaving, so the bicycle antero posterior axis whether rational in infrastructure promptly be the key that addresses the above problem.General existing vehicle front and rear casing is all combined by parts such as beam barrel, bar dish and bearing seats, it has better manufacturability and economy, but many combinations easily form accumulated error, refill the easy generation in axle bowl back and radially reach face runout, cause the effort of riding, and many combinations then there is not bulk strength.In addition, the axle housing of whole shape is arranged also, have plenty of the forging type of using, also useful forging mode is made, but all needs machine up, and not only waste material but also waste man-hour improved cost.

The purpose of this utility model provides a kind of antero posterior axis axle housing of new structure, and it is an integral type, and it can improve the positional precision of intensity, rigidity, assurance two end axles bearing, with the solution brisk problem of riding.

By as above design, the integral type bicycle antero posterior axis axle housing that this programme provided is to process with the mode of roll extrusion and punching press combination, it includes beam barrel, the bar dish, bearing seat, its concrete feature is: the beam barrel of this front and back axle housing, bearing seat, the bar dish is an integral type, their beam barrel is a symmetrical thin-wall curve tubular, the diameter of centre portion is more small in ends, the bar dish at two ends is double-level-metal dishes of the thin-walled bending of uniform cylindrical void on and the circumference vertical with the beam barrel line of centers, the bearing seat at two ends is the shallow cylindrical holes of two concentric thin-walls, on the outer rim of a side bearing seat of carrier housing screw thread is arranged, the endoporus of bearing seat also has a stepped hole that cooperates with the axle bowl.

In this programme on the bar dish of antero posterior axis axle housing by different size 20-36 the spoke hole that distributing equably.Promptly on the dish 10-18 hole arranged on one side.

The front and back axle housing of this programme is to adopt the mode of roll extrusion and punching press combination to make, and earlier metal tube is pressed into the tubular of curve appearance, again with the punch process that the mould tire is arranged, forms the bar dish and the shallow circular hole bearing seat of thin-wall of thin-walled bending.What adopt here is to make few cutting on the processes of metal flow and plastic deformation, and it has the material saving, and the characteristics that the intensity degree is high are suitable for batch manufacturing.

Figure 1A is the structural representation of this programme front axle axle housing, and Figure 1B is the side direction view of Figure 1A.

Fig. 2 A is the structural representation of this programme rear axle axle housing, and Fig. 2 B is the side direction view of Fig. 2 A.

Fig. 3 A is a kind of distortion of the preceding axle housing on this programme, and bearing seat is at bar dish in-to-in structural representation.Fig. 3 B is the side direction view of Fig. 3 A.

Beam barrel among the figure (1) is middle thin two pluckings curve tubulars, bar dish (2) is the salver of double-deck bending, bearing seat (3) is the shallow cylindrical hole of thin-wall, screw thread is arranged, the stepped hole that cooperates with the axle bowl in addition in the endoporus at carrier housing two ends in an end outer rim of carrier housing.In addition, the form of distortion of front axle (4), its bar dish be single layer the dish and bearing seat in the inside of bar dish, this form only is applicable to front axle.

This programme can adopt the LD2 or 6061 materials of lead alloy, also can adopt the common stamped steel material of 10-15 steel or SPCC, and the front and back axle housing of this structure is applicable to the various vehicles of bicycle, currently mainly is used on the mountain bike.

Claims

1, a kind of roll extrusion, punching press is in conjunction with axle housing before and after the integral type bicycle of processing, it includes beam barrel, bearing seat, the bar dish, the beam barrel that it is characterized in that this front and back axle housing, bearing seat, the bar dish is the one form, their beam barrel is to be symmetrical thin-wall curve tubular, the centre portion diameter is more small in ends, the bar dish at two ends is double-level-metal dishes of the thin-walled bending of uniform cylindrical void on and the circumference vertical with the beam barrel line of centers, the two end axles bearing all is the shallow cylindrical hole of concentric thin-wall, on the outer rim of a side bearing seat of carrier housing screw thread is arranged, the endoporus of bearing seat also has a stepped hole that cooperates with the axle bowl.

2,, it is characterized in that on its bar dish of antero posterior axis axle housing by different size 20-36 the spoke hole that distributing equably according to the described front and back of claim 1 axle housing.