Gear fan shaft for recirculating ball steering gear and its processing method, steering gear and vehicle

Abstract

The invention relates to a sector shaft for a circulating ball type steering gear and a machining method thereof, a steering gear, and a vehicle. The sector shaft includes a sector shaft body; a central gear of the sector shaft body includes a pair of bosses formed on tooth profiles at two opposite sides of the central gear; the pair of bosses are symmetrical with respect to a longitudinal centralcross section of the central gear; each boss includes an intermediate section intersecting with reference circles of all the cross sections of a sector of the sector shaft, and side sections positioned on an upper side and a lower side of the intermediate section respectively and having a thickness not greater than the intermediate section. The pair of bosses are arranged on the central gear, thecirculating ball type steering gear can satisfy an ideal matching clearance characteristics of the steering sector shaft and a steering nut, the clearance is zero while an automobile runs linearly, and the position feeling of the central portion of the steering gear is improved; and after a steering wheel rotates at a certain angle, the steering gear has good steering reversal performance.

Description

technical field [0001] The present disclosure relates to vehicle components, in particular, to a fan shaft for a recirculating ball steering gear, a steering gear including the fan shaft for a recirculating ball steering gear, a vehicle including the steering gear, and a gear fan for a recirculating ball steering gear Shaft processing method. Background technique [0002] Automobile steering system is a special mechanism used to change or maintain the direction of automobile driving. The steering gear, steering wheel and steering column constitute the automobile steering system, and the steering gear is the core component of the automobile steering system. Through the conversion of the internal parts of the steering gear, the transmission mechanism converts the driver's rotation of the steering wheel into the swing of the steering knuckle arm, thereby driving the front wheels to turn. On the one hand, it enables the car to change its driving direction in a timely manner acc...

AI Technical Summary

Problems solved by technology

[0006] 1. When the clearance between the steering gear fan shaft and the steering nut is too small, although the clearance of the steering gear in the straight-line driving position of the car is small, due to the large friction torque of the gear fan rack pair, the returning performance of the car will be reduced when turning. Poor feel when turning;

[0007] 2. When the clearance between the steering gear fan shaft and the steering nut is too large, although it can improve the steering ability of the car, it will also increase the clearance of the steering gear at the straight-line driving position of the car, making the steering sluggish and the sensitivity reduced. Even noisy at high speeds

Images