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Electric power steering device

A technology of electric power steering and steering system, which is applied in the direction of electric steering mechanism, automatic steering control components, steering mechanism, etc., and can solve problems such as burnout

Inactive Publication Date: 2009-05-13
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, overload is applied to the motor, which may cause blown

Method used

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Experimental program
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Effect test

no. 1 approach 》

[0064] A first embodiment of the present invention will be described with reference to FIGS. 1 to 9A-C.

[0065] FIG. 1 is a configuration diagram of an electric power steering system according to a first embodiment of the present invention.

[0066] figure 2 It is a side view of the torque sensor and the vicinity of the pinion of the steering gear box in FIG. 1 .

[0067] As shown in FIG. 1, an electric power steering device 100A uses two universal joints 3b to connect the steering wheel shaft 3a, the shaft 3c, and the input shaft 3d provided with the steering wheel (operating member) 3. The input shaft 3d is connected to the small The pinion shaft 7 is connected. In addition, the pinion 7a provided at the lower end of the pinion shaft 7 meshes with the rack 8a of the rack shaft 8 that can move back and forth in the vehicle width direction. The rods 9, 9 connect the left and right front wheels 1L, 1R.

[0068] Such as figure 2 As shown, the rack shaft 8 is supported by th...

no. 2 approach 》

[0193] Next, an electric power steering system according to a second embodiment of the present invention will be described with reference to FIG. 14 .

[0194] 14 is a configuration diagram of an electric power steering device according to a second embodiment of the present invention. The electric power steering device 100B of the present embodiment is of a type in which the motor 4 assists in driving the rack shaft 8 via the ball screw 5c.

[0195] The difference from the first embodiment is that instead of the electric motor 4 driving the pinion shaft 7 via the worm gear 5a and the worm gear 5b, in this embodiment, the electric motor 4 drives the reduction mechanism (auxiliary gear) composed of the worm gear 5a and the worm gear 5b The torque transmission mechanism) 5B and the ball screw 5c are driven by directly converting the rotational motion of the ball screw 5c into the linear motion of the rack shaft 8 .

[0196] Another point of difference is that instead of the torq...

no. 3 approach 》

[0209] Second, refer to Figure 15 At the same time, an electric power steering system according to a third embodiment of the present invention will be described.

[0210] Figure 15 It is a configuration diagram of an electric power steering system according to a third embodiment of the present invention. The electric power steering device 100C of the present embodiment is of a type that assists in driving the steering shaft 3 a by the electric motor 4 via the worm gear 5 a and the worm gear 5 b.

[0211] The difference from the first embodiment is that instead of the electric motor 4 driving the pinion shaft 7 through the worm gear 5a and the worm gear 5b, in this embodiment, the electric motor 4 drives the pinion shaft 7 through the speed reduction mechanism (auxiliary rotation mechanism) composed of the worm gear 5a and the worm gear 5b. Torque transmission mechanism) 5A drives the steering wheel shaft 3a.

[0212] Another point of difference is that instead of the torq...

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Abstract

An electric power steering device is configured to transmit an auxiliary torque to a steering unit of front wheels, and includes: a steering wheel (operator); an electric motor configured to generate the auxiliary torque in accordance with at least a steering torque generated by input from the operator; the steering unit of front wheels which includes a pinion shaft; and a rotation terminating mechanism which provides a motion terminating end of the operator, the rotation terminating mechanism being disposed between the steering wheel and the pinion shaft.

Description

technical field [0001] The present invention relates to an electric power steering apparatus that provides steering assist force by an electric motor to a power steering system of a vehicle such as an automobile. Background technique [0002] The electric power steering device enables the motor to generate assist torque according to the magnitude of the steering torque, and transmits the assist torque to the steering system to reduce the steering force of the driver. [0003] In a general electric power steering device, in order to prevent the steering of more than a certain number of steering wheels, a rack end is provided on the rack shaft, and a housing end is provided on the rack housing part that accommodates the rack shaft. The rack end mechanism constituted by the end of the rack and the end of the housing steers the steering wheel from the neutral position to the left and right to predetermined angles, so that the steering angle of the steering wheel reaches the maxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D6/00B62D5/22B62D101/00B62D113/00B62D119/00
Inventor 清水康夫渡边胜治米田笃彦山胁茂
Owner HONDA MOTOR CO LTD
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