Connecting device and steering gear box

Abstract

The invention relates to a connecting device and a steering gear box, the connecting device is connected between a steering column of the steering gear box and a vehicle steering pull rod and is used for outputting steering power, the connecting device comprises a first transmission part and a second transmission part, the first transmission part is provided with a plurality of first arc-shaped teeth arranged in the circumferential direction, and the first transmission part is connected with the steering column to rotate synchronously; the second transmission part is connected with the steering pull rod and is provided with a plurality of second arc-shaped teeth in the linear direction; when the first transmission part rotates, the first arc-shaped teeth are meshed with the second arc-shaped teeth to drive the second transmission part to move so as to drive the steering pull rod to move. The first transmission part and the second transmission part are meshed and contacted through the arc-shaped teeth, the contact area of the first transmission part and the second transmission part is close to the middle section of the tooth width, the meshing performance is good, the number of meshed and contacted tooth surfaces is large, and the contact ratio is large, so that during operation, transmission is stable, the contact gap is small, meanwhile, the contact impact is small, the contact stress is small, the bearing capacity is large, and the purposes of miniaturization and light weight of the steering gear box are achieved.

Description

technical field [0001] The invention belongs to the field of automobile steering gear transmission equipment, in particular to a connecting device and a steering gear. Background technique [0002] Steering machine is an important part of vehicle steering system. In the existing rack and pinion steering machine technology, involute straight teeth or helical teeth are generally used. Involute tooth shape meshing is insufficient, and there will be gaps in the process of steering transmission. And impact load, the coincidence degree is not high, it will produce stress concentration and affect the service life, the bearing capacity is limited, which is not conducive to the miniaturization and light weight of the steering machine. [0003] Although the existing technology can meet the needs of ordinary passenger cars, in the field of racing, when the racing car is running at high speed, a little steering gap will affect the driver's control of the racing car, which may cause seri...

AI Technical Summary

Problems solved by technology

[0002] Steering machine is an important part of vehicle steering system. In the existing rack and pinion steering machine technology, involute straight teeth or helical teeth are generally used. Involute tooth shape meshing is insufficient, and there will be gaps in the process of steering transmission. and impact load, the degree of coincidence is not high, which will cause stress concentration and affect the service life, and the bearing capacity is limited, which is not conducive to the miniaturization and light weight of the steering machine

[0003] Although the existing technology can meet the needs of ordinary passenger cars, in the field of racing, when the racing car is running at high speed, a little steering gap will affect the driver's control of the racing car, which may cause serious accidents. It also bears a large steering force, with stress concentration and impact load, which may also cause the risk of steering failure. At the same time, the racing car also has high requirements for the miniaturization and weight reduction of components.

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