Car spare tire installation structure

Abstract

The invention discloses an automobile spare tire installing structure, which comprises a spare tire pool arranged on a back floor, wherein the spare tire pool comprises a spare tire pool front part and a spare tire pool back part; the spare tire pool front part is of a circular arc structure; the spare tire pool back part extends out in the tangential direction of the circular arc of the spare tire pool front part; the cross section of the spare tire pool back part is in a U shape; an installing support frame used for installing an automobile spare tire is arranged in a connecting position of the spare tire pool front part and the spare tire pool back part; structure reinforcing structures are arranged on the periphery of the installing support frame and at the spare tire pool front part and the spare tire pool back part. The automobile spare tire installing structure has the advantages that the carrying capability is high; the structure is simple; the manufacturing process is simple; good modal stiffness performance is realized; the light-weight requirements can be met.

Description

technical field [0001] The invention relates to the technical field of automobile structure, relates to the automobile body structure, more specifically, relates to the installation structure of the automobile spare tire. Background technique [0002] Modern car design pays more and more attention to the safety and comfort of cars. Faced with the pressure of energy saving and emission reduction, major automobile manufacturers pay more attention to the optimization of the body structure, hoping to reduce the production cost to the greatest extent while ensuring the performance of the whole vehicle. [0003] Spare tires are mostly placed in the spare tire pool in the existing automobile trunk. The spare tire pool is a part of the rear floor of the car, which is mainly used to store the spare tire so that when the car breaks down, the spare tire can be used to replace the scrapped tire. But existing automobile has the following problems in the design of the spare tire fixing ...

AI Technical Summary

Problems solved by technology

[0004] Problems that may be caused by the load of the spare tire pool: more and more cars are now equipped with full-size spare tires, and often equipped with a complete set of on-board tools, which leads to the fact that the spare tire pool needs to bear the weight of the spare tire on the basis of greater load

When the car is driving at high speed or in relatively bad road conditions, the overall vibration of the car body is relatively severe, and the local load of the spare tire pool is too heavy, which can easily cause the solder joints at the fixing structure of the spare tire to fall off, or even cause the risk of cracking

[0005] Problems in the processing technology of the spare tire pool: most of the spare tire pools are formed by stamping process

The storage space required for the spare tire is large, resulting in a deep spare tire pool and a large depth of sheet metal drawing

Usually, the material thickness of the rear floor is very thin, which can easily lead to insufficient local modal stiffness of the spare tire pool

At the same time, due to the thinning caused by the stamping process, the thickness of the spare tire pool will be greatly reduced, which will inevitably lead to the risk of partial cracking of the spare tire pool

[0006] Problems in the way of fixing the spare tire: In order to facilitate the replacement of tires after accidental damage, existing cars will be equipped with spare tires

However, the frequency of use of the spare tire is very low. In order to prevent the spare tire from loosening, the spare tire needs to be fixed very firmly.

If the tightening torque is insufficient when the spare tire is fixed, the spare tire will easily loosen, which will cause abnormal noise

If the tightening torque is too large when fixing the spare tire, it will cause inconvenience in assembly and disassembly, and at the same time, it will easily cause local stress concentration at the fixing structure of the spare tire, resulting in the risk of cracking

[0007] NVH performance problems that may exist in the spare tire fixing device: When the car is running, if the local modal stiffness of the spare tire pool is insufficient, low-frequency resonance is likely to occur, reducing the NVH performance and affecting the quality of the vehicle

The deficiencies of these improvement methods are also obvious. Replacing the floor material will increase the difficulty of the stamping process. Increasing the thickness of the rear floor material or adding reinforcements around the rear floor spare wheel pool will increase the weight of the vehicle body and reduce fuel economy. will increase the cost

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