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Rack gear-sector pair with variable transmission clearance characteristic and automobile steering gear

A rack-tooth and variable transmission technology, which is applied to steering gears, mechanical steering gears, steering mechanisms, etc., can solve problems such as complex manufacturing process, high difficulty in processing and testing, and transmission gap characteristic curves that cannot meet the design requirements. Process and detection of simple effects

Pending Publication Date: 2020-11-06
东科克诺尔商用车制动技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to realize the variable transmission of the steering gear: the usual method is the rack drop method structure, or the tooth sector eccentric method; the transmission clearance characteristic curve of the rack drop method structure cannot meet the design requirements; the tooth sector eccentric method can meet the design requirements, but the manufacturing Complex process, high difficulty in processing and testing

Method used

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  • Rack gear-sector pair with variable transmission clearance characteristic and automobile steering gear
  • Rack gear-sector pair with variable transmission clearance characteristic and automobile steering gear
  • Rack gear-sector pair with variable transmission clearance characteristic and automobile steering gear

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Embodiment Construction

[0016] Further describe the present invention below in conjunction with accompanying drawing.

[0017] figure 1 The automobile steering gear involved in the present invention includes a housing 1, a valve body 2, a piston 3, a rocker shaft 4, and a steering control valve 5. The housing 1 and the valve body 2 are fixedly connected, and the steering control valve 5 is installed on the valve body 2. and cooperate with the piston 3, the rocker shaft 4 is installed on the housing 1, the gear fan on the rocker shaft 4 cooperates with the rack function part on the piston 3, the piston 3 is located in the inner cylinder hole of the housing 1 and can Moving left and right, the rocker shaft 4 is driven to rotate clockwise or counterclockwise through the cooperation of the teeth. The tooth fan and the rack function part in the example of the present invention adopt the variable transmission ratio design, so the tooth shape of the rack tooth part is not the straight line tooth shape of a...

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Abstract

The invention provides a rack gear-sector pair with a variable transmission clearance characteristic and an automobile steering gear. According to the rack gear-sector pair, an intermediate tooth meshing clearance of a gear-sector and a rack function part corresponding to the intermediate meshing position of the steering gear is 0, with a gear face meshing line with the intermediate tooth meshingclearance of the rack function part being 0 as a datum, tooth shapes of rack intermediate teeth are modified symmetrically to two sides based on original shapes, and a transmission clearance is gradually increased to a fixed value correspondingly. The automobile steering gear adopts the rack gear-sector pair, in order to achieve the variable transmission clearance characteristic, the racks of therack gear-sector pair (the rack functional part, the gear-sector) of the automobile steering gear are modified and the tooth shapes of the rack intermediate teeth are modified symmetrically to two sides based on the original shapes, the transmission clearance is gradually increased to the fixed value correspondingly, and a rack tooth shape correction method is adopted to obtain an idea variable transmission clearance characteristic curve.

Description

technical field [0001] The invention belongs to the field of automobile steering gears, and relates to a rack-and-pinion pair and a recirculating ball steering gear with variable transmission gap characteristics. Background technique [0002] Transmission gap characteristics of automobile steering gear: refers to the gap between each transmission pair in various steering gears (such as the gear and rack transmission pair of rack-and-pinion steering gear; the gear fan and rack gear transmission pair of recirculating ball steering gear) Clearance; this clearance varies with the magnitude of the steering angle. [0003] The transmission gap characteristics of the steering gear directly affect the maneuverability, stability and service life of the car. The gear fan and the rack transmission pair of the recirculating ball steering gear mostly adopt variable clearance transmission, that is, the transmission gap between the rack and the gear fan increases with the increase of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/08F16H55/26B62D3/12
CPCF16H55/08F16H55/26B62D3/126
Inventor 李群辉
Owner 东科克诺尔商用车制动技术有限公司
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