Double-gear type electric power steering gear and steering gear gap adjusting method

Abstract

The invention discloses a double-gear type electric power-assisted steering gear and a steering gear gap adjusting method, the steering gear comprises a steering gear, a hand-operated end pull rod and a power-assisted end pull rod are arranged at the two ends of the steering gear respectively, and a first output end and a second output end are installed at the ends, away from each other, of the hand-operated end pull rod and the power-assisted end pull rod respectively; an input end is arranged at the upper end of the steering gear, and a hand-operated end gear rack gap adjusting mechanism and a power-assisted end gear rack gap adjusting mechanism are arranged on the two sides of the front end of the steering gear respectively. According to the gap adjustment method, the power-assisted end gap is adjusted preferentially, then the hand-assisted end gap is adjusted, the no-load rotation torque test is performed based on the state, the gap adjustment is performed according to the judgment principle in combination with the test condition, and the method can ensure that the gear rack gap and the no-load rotation torque are both in the optimal state at the same time. Therefore, the power-assisted performance and the power-assisted effect of the steering gear are ensured while no abnormal sound and the service life of the steering gear are ensured.

Description

technical field [0001] The invention relates to the technical field of electric power steering, in particular to a dual-gear electric power steering and a method for adjusting the clearance of the steering. Background technique [0002] In mid-to-high-end models, the commonly used types of electric power steering are pinion type (P-EPS), double-pinion type (DP-EPS), and rack type (R-EPS). For models with medium steering output, small installation space, and high requirements for steering performance, dual-gear electric power steering (DP-EPS for short) is more suitable. Due to its dual-gear structure, DP-EPS has the following advantages : [0003] 1. The steering gear has high rigidity and good stability; [0004] 2. The motor and controller can be set parallel to the rack, and the required installation space is small; [0005] 3. The input gear and the power boost gear are designed separately, which can have both the portability and sensitivity of the steering system. ...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiencies of the prior art, the present invention provides a dual-pinion electric power steering gear and a method for adjusting the clearance of the steering gear, which solves the problem that there is no systematic adjustment method for the rack-and-pinion clearance of the current double-pinion electric power steering gear question

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