JPH0286877U

JPH0286877U -

Info

Publication number: JPH0286877U
Application number: JP16709988U
Authority: JP
Priority date: 1988-12-23
Filing date: 1988-12-23
Publication date: 1990-07-10

Description

[Brief explanation of drawings]

第１図は本考案に従つた電動パワーステアリン
グ装置の一実施例の詳細を示す縦断面図、第２図
は第１図におけるＡ−Ａ断面図である。１０……電動パワーステアリング装置、１１…
…入力軸、１１ｃ……らせん状溝、１１ｄ……長
孔、１１ｅ……貫通孔、１２……出力軸、１２ｂ
……６角部、１３……トーシヨンバー、１８……
スライダ、１８ｃ……軸方向の長孔、１９……ボ
ール、２１……ピン、２２……コロ、２３……ア
ウタースリーブ、２３ａ……ウオームホイール、
２４……電動モータ、２５……ウオーム、２７…
…ボール、２８……レバー、３３……弾性部材。 FIG. 1 is a longitudinal sectional view showing details of an embodiment of an electric power steering device according to the present invention, and FIG. 2 is a sectional view taken along line A-A in FIG. 10...Electric power steering device, 11...
...Input shaft, 11c...Spiral groove, 11d...Long hole, 11e...Through hole, 12...Output shaft, 12b
...Hexagonal part, 13...Torsion bar, 18...
Slider, 18c... Long hole in the axial direction, 19... Ball, 21... Pin, 22... Roller, 23... Outer sleeve, 23a... Worm wheel,
24...Electric motor, 25...Worm, 27...
...Ball, 28...Lever, 33...Elastic member.

Claims

[Scope of utility model registration request]

A steering torque detector that detects a steering torque applied between an input shaft connected to a steering wheel of a vehicle and an output shaft connected to a steering gear, and a control means responsive to a detection signal from the steering torque detector. an electric motor whose rotation is controlled by a control signal and whose rotation is transmitted to the output shaft;
An electric power steering device comprising a clutch interposed between the electric motor and the output shaft for controlling transmission of rotation of the electric motor to the output shaft on and off, wherein the input shaft is formed in a cylindrical shape. The two shafts are connected through an elastic body, the steering torque detector detects steering torque according to elastic deformation of the elastic body, and a plurality of through holes are formed at an end of the input shaft. At the same time, a multifaceted portion is formed on the outer peripheral surface of the output shaft, and the output shaft is loosely fitted to the end of the input shaft such that the multifaceted portion and the through hole overlap with each other, and the clutch is inserted into the input shaft. a cylindrical outer ring arranged concentrically with the output shaft with a gap left between the input shaft and the rotation of the electric motor is transmitted via a reduction gear; and a cylindrical outer ring arranged within the through hole and the input shaft. an engaging member disposed within the through hole that engages with the inner circumferential surface of the cylindrical outer ring and each of the multifaceted portions in response to rotation of the cylindrical outer ring, and is capable of connecting the cylindrical outer ring and the output shaft; The engagement member includes an elastic member that biases one end surface of the through hole in the circumferential direction, and the clutch controls the connection and disconnection of the output shaft and the electric motor by elastic deformation of the elastic body, and An electric power steering device characterized in that the speed reducer includes a resin worm wheel integrally molded with the cylindrical outer ring, and a worm meshing with the worm wheel and connected to a rotating shaft of the electric motor.