Eccentric supporting shaft of automobile rear wheel

Abstract

An eccentric supporting shaft of an automobile rear wheel is provided with eccentric shaft heads and a hollow shaft tube, the two axial ends of the hollow shaft tube are each fixedly connected with one eccentric shaft head, the two eccentric shaft heads are arranged on the same axis, each eccentric shaft head comprises a shaft tube assembly section and a shaft neck assembly hole, and the shaft neck assembly holes are eccentric to the shaft tube assembly sections. The axis of the shaft tube assembling section and the axis of the shaft neck assembling hole extend in the horizontal direction, the shaft neck is in interference fit with the interior of the shaft neck assembling hole, and the hollow shaft tube is fixedly connected with the outer wall of the shaft tube assembling section.

Description

Technical Field

[0001] The utility model belongs to the technical field of rear axles, and particularly relates to an eccentric support shaft for an automobile rear wheel. Background Art

[0002] An eccentric rear axle refers to a rear axle in which the center line of the axle neck of the automobile rear axle is not on the same horizontal line as the center line of the axle tube, and the two center lines are parallel. The rear axle includes an axle neck and an axle tube. The axle neck of the rear axle is a key component for connecting the automobile wheel hub. In order to achieve an eccentric structure, the axle neck and the axle tube need to be connected through an axle head. Figure 3 、 Figure 4 Fig. is a schematic structural diagram of an eccentric rear axle in the prior art, in which the axle neck 1 and the axle head 2 are integrally formed, which is an integral eccentric axle seat. A through hole 4 for interference fit with the axle tube 3 is further provided at the lower part of the axle head 2. The axis line of the axle neck 1 is offset from the axis line of the through hole 4. Therefore, the integral eccentric axle seat will undergo drawing and bending processes during processing. At the same time, in order to ensure smooth forging, a higher temperature needs to be maintained during processing to ensure the fluidity of the steel. And in the prior art, the outer wall of the axle tube 3 is in interference fit with the inner wall of the axle neck 1. In order to ensure the strength of the rear axle, the axle tube 3 and the axle neck 1 need to be welded and fixed at both A and B. The whole axle tube needs to be welded at 4 places, with many welding points and complicated processes. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems existing in the prior art and propose an eccentric support shaft for an automobile rear wheel. By separately arranging the axle neck and the eccentric axle head, and making the axle neck of the axle neck interference fit with the assembly hole of the eccentric axle head, compared with the integral eccentric axle seat in the prior art, the separately arranged structure simplifies the drawing and bending steps during processing, is more convenient to process, and has higher efficiency. The hollow axle tube of the utility model is fixedly connected to the outer wall of the axle tube assembly section of the eccentric axle head. Compared with the interference fit between the outer wall of the axle tube and the inner wall of the axle neck in the prior art, only one welding is required after the improvement. After testing by the applicant, the strength meets the requirements, and at the same time, the cost is reduced and the efficiency is improved.

[0004] The purpose of the utility model is achieved as follows.

[0005] An eccentric support shaft for an automobile rear wheel is provided with an eccentric axle head and a hollow axle tube. One eccentric axle head is fixedly connected to each axial end of the hollow axle tube. The two eccentric axle heads are arranged on the same axis line. The eccentric axle head includes an axle tube assembly section and an axle neck assembly hole. The axle neck assembly hole is eccentric to the axle tube assembly section. The axis lines of the axle tube assembly section and the axle neck assembly hole both extend in the horizontal direction. The axle neck is in interference fit in the axle neck assembly hole. The hollow axle tube is fixedly connected to the outer wall of the axle tube assembly section.

[0006] Furthermore, an axial through hole is provided in the axle tube assembly section, and the axial through hole is communicated with the axle hole of the hollow axle tube.

[0007] Further, the shaft tube assembly section is in a two - level stepped shape. The small - diameter section of the shaft tube assembly section is in transitional fit with the inner wall of the shaft tube. The axial end of the shaft tube is welded to the outer wall of the small - diameter section of the shaft tube assembly section, and the outer wall of the shaft tube is flush with the large - diameter section of the shaft tube assembly section.

[0008] Further, weight - reducing holes are provided on the facing surfaces of the two eccentric shaft heads.

[0009] Further, liquid leakage holes are provided on the wall of the hollow shaft tube.

[0010] With the above - mentioned scheme, the eccentric support shaft of the rear wheel of the vehicle of the present utility model has a simple structure, improves the processing efficiency and reduces the cost.

[0011] The present utility model will be further described below in conjunction with the specification drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model.

[0013] Figure 2 is Figure 1 an enlarged view of part C in

[0014] Figure 3 is a schematic structural diagram of the prior art.

[0015] Figure 4 is Figure 3 an enlarged view of part D in

[0016] Description of reference numerals: journal 1, eccentric shaft head 2, hollow shaft tube 3, through - hole 4, shaft tube assembly section 5, journal assembly hole 6, weight - reducing hole 7, liquid leakage hole 8, shaft hole 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] See Figure 1 and Figure 2, An eccentric support shaft for the rear wheel of an automobile, provided with an eccentric shaft head 2 and a hollow shaft tube 3. Each axial end of the hollow shaft tube 3 is fixedly connected to an eccentric shaft head 2, and the two eccentric shaft heads 2 are arranged on the same axis. The eccentric shaft head 2 includes a shaft tube assembly section 5 and a journal assembly hole 6, and the journal assembly hole 6 is eccentric to the shaft tube assembly section 5. The axis lines of the shaft tube assembly section 5 and the journal assembly hole 6 both extend in the horizontal direction, and the journal 1 is in interference fit in the journal assembly hole 6. Further, a weight reduction hole 7 is provided on the facing surfaces of the two eccentric shaft heads 2 to make the whole lighter. The hollow shaft tube 3 is fixedly connected to the outer wall of the shaft tube assembly section 5. Further, the shaft tube assembly section 5 is of a two-stage stepped shape, the small-diameter section of the shaft tube assembly section 5 is in transitional fit with the inner wall of the shaft tube 3, and the axial end of the shaft tube 3 is welded to the outer wall of the small-diameter section of the shaft tube assembly section 5. Compared with the prior art, only one welding is required between the shaft tube 3 and the shaft tube assembly section 5 of the present invention. After experimental verification by the applicant, the strength meets the requirements, the processing steps are reduced, and the cost is lowered; the outer wall of the shaft tube 3 is flush with the large-diameter section of the shaft tube assembly section 5. Further, the shaft tube assembly section 5 is provided with an axial through hole, and the axial through hole is communicated with the shaft hole 9 of the hollow shaft tube 3 to make the whole lighter. A liquid leakage hole 8 is provided on the wall of the hollow shaft tube 3, and the liquid leakage hole 8 is used to timely discharge the muddy water when the hollow shaft tube 3 is in use.

[0018] The eccentric support shaft for the rear wheel of the automobile of the present invention has a simple structure, high processing efficiency and low processing cost compared with the prior art.

[0019] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications made by those skilled in the art without departing from the spirit of the present invention fall within the protection scope of the present invention.

Claims

1. An eccentric support shaft for the rear wheels of an automobile, provided with an eccentric shaft head (2) and a hollow shaft tube (3). Each of the two axial ends of the hollow shaft tube (3) is fixedly connected to an eccentric shaft head (2), and the two eccentric shaft heads (2) are arranged on the same axis. It is characterized in that: The eccentric shaft head (2) includes a shaft tube assembly section (5) and a journal assembly hole (6). The journal assembly hole (6) is eccentric to the shaft tube assembly section (5). The axis lines of both the shaft tube assembly section (5) and the journal assembly hole (6) extend in the horizontal direction. The journal (1) is press-fitted in the journal assembly hole (6), and the hollow shaft tube (3) is fixedly connected to the outer wall of the shaft tube assembly section (5).

2. The eccentric support shaft of the rear wheel of an automobile according to claim 1, characterized in that: The shaft tube assembly section (5) is provided with an axial through hole, and the axial through hole communicates with the shaft hole (9) of the hollow shaft tube (3).

3. The eccentric support shaft for the rear wheel of an automobile according to claim 1 or 2, characterized in that: The shaft tube assembly section (5) is of a two-stage stepped shape. The small-diameter section of the shaft tube assembly section (5) is in transitional fit with the inner wall of the shaft tube (3). The axial end of the shaft tube (3) is welded to the outer wall of the small-diameter section of the shaft tube assembly section (5), and the outer wall of the shaft tube (3) is flush with the large-diameter section of the shaft tube assembly section (5).

4. The eccentric support shaft of the rear wheel of an automobile according to claim 3, characterized in that: Weight-reducing holes (7) are provided on the facing surfaces of the two eccentric shaft heads (2).

5. The eccentric support shaft of the rear wheel of an automobile according to claim 4, characterized in that: Leakage holes (8) are provided on the wall of the hollow shaft tube (3).

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