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Dual-pinion electric power steering device

A technology of electric power steering and double pinions, which is applied in the direction of electric steering mechanism, power steering mechanism, steering gear, etc., can solve the problems such as the decrease of steering feel of the steering wheel, the concentration of rack teeth phase deviation, etc., and achieve the purpose of suppressing the decrease of steering feel Effect

Active Publication Date: 2018-03-27
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, for the rack and pinion on the steering shaft side that share the same rack shaft as the rack and pinion on the motor side, there may be a problem that the phase shift caused by the rack teeth is concentrated and the steering feel of the steering wheel may be reduced.

Method used

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  • Dual-pinion electric power steering device
  • Dual-pinion electric power steering device
  • Dual-pinion electric power steering device

Examples

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each figure, "front and rear" indicates the vehicle front-rear direction, "left and right" indicates the vehicle width direction (left-right direction), and "up and down" indicates the vertical up-down direction.

[0027] like figure 1 As shown, a double pinion type electric power steering device 10 (hereinafter, simply referred to as electric power steering device 10 ) is configured to include: a steering mechanism 14 having a rack shaft (rack bar) 12 extending in the left-right direction; A torque assist mechanism 16 on one end side of the rack shaft 12 .

[0028] The steering mechanism 14 includes a steering wheel 18 for the driver to control the direction of the steering wheel 18 , a steering shaft 20 turned in a predetermined direction by the direction control of the steering wheel 18 , and a pinion shaft (first pinion shaft) 24 . The pi...

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PUM

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Abstract

A dual-pinion electric power steering device has a pinion shaft (24) to which steering force from a steering wheel (18) is transmitted, a rack (12a) provided to a rack shaft (12) and capable of meshing with the pinion shaft (24), a pinion shaft (38) to which rotational drive force from an assisting electric motor (34) is transmitted, and a rack (12b) provided to the rack shaft (12) and capable ofmeshing with the pinion shaft (38). A steering-side guide mechanism (32) is provided with a first rack guide member for pushing the rack shaft (12) toward the pinion shaft (24), an assist-side guide mechanism (40) is provided with a second rack guide member for pushing the rack shaft (12) toward the pinion shaft (38), and the first rack guide member is formed to be less rigid than the second rackguide member, depending on, e.g., material and shape.

Description

technical field [0001] The present invention relates to a double pinion type electric power steering device having two pinion shafts. Background technique [0002] For example, as shown in Patent Document 1, a double-pinion type electric power steering device having two pinion shafts is known. In this double pinion type electric power steering device, one of the two pinion shafts is connected to the steering shaft side, and the other pinion shaft is connected to the motor side (motor side) for assisting (assisting) steering force . [0003] The rack shaft moves leftward or rightward along the vehicle width direction by meshing with the two pinion shafts. Due to the two pinion shafts, a reaction force acts on the rack shaft in a direction separating the rack shaft and the pinion shaft. Therefore, for the two pinion shafts, it is necessary to press the back of the rack shaft with the rack guide, respectively. [0004] prior art literature [0005] patent documents [000...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D3/12
CPCB62D3/123B62D3/12B62D5/0403B62D5/0424B62D5/0454B62D5/0463
Inventor 三好尚田中阳介岛田裕一立石努
Owner HONDA MOTOR CO LTD
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