JPS62149481U

JPS62149481U -

Info

Publication number: JPS62149481U
Application number: JP3705086U
Authority: JP
Priority date: 1986-03-14
Filing date: 1986-03-14
Publication date: 1987-09-21

Description

[Brief explanation of the drawing]

第１図はこの考案に係る電動式パワーステアリ
ング装置の縦断面図、第２図は減速機構を示す第
１図中の―矢視断面図、第３図は減速機構の
他の実施例を示す第２図同様の断面図である。図面において、１は入力軸、２は操舵回転検出
器、３は操舵トルク検出器、４は補助トルク発生
用電動機、５は出力軸、６は減速機構、６１はカ
ム、６２は弾性軸受け、６３は弾性ギヤ、６４は
リングギヤ、６６はオルダム軸継手である。 Fig. 1 is a longitudinal cross-sectional view of the electric power steering device according to this invention, Fig. 2 is a cross-sectional view taken along the - arrow in Fig. 1 showing the deceleration mechanism, and Fig. 3 shows another embodiment of the deceleration mechanism. It is a sectional view similar to FIG. 2. In the drawing, 1 is an input shaft, 2 is a steering rotation detector, 3 is a steering torque detector, 4 is an auxiliary torque generation electric motor, 5 is an output shaft, 6 is a reduction mechanism, 61 is a cam, 62 is an elastic bearing, 63 64 is an elastic gear, 64 is a ring gear, and 66 is an Oldham shaft coupling.

Claims

[Claims for Utility Model Registration] (1) An input shaft that transmits steering motion;
An electric power steering device including an electric motor that generates necessary auxiliary torque as the input shaft rotates, and a reduction mechanism that transmits the auxiliary torque generated by the electric motor to the output shaft at a desired rotation speed. The reduction mechanism includes a ring gear having teeth on its inner circumference and fixed to a stationary system, and a ring gear connected to the output shaft on one end side, having teeth on the outer circumference on the other end side, elastically deformable in the radial direction, and axially deformable. A cup-shaped elastic gear that is rigid against torsion, and a cam that is connected to the rotor of the electric motor and meshes the outer teeth of the elastic gear with the inner teeth of the ring gear at two opposing locations. A distinctive electric power steering device. (2) The electric power steering device according to claim (1), wherein the cam has an ellipsoidal surface. (3) Scope of claims for utility model registration, paragraph (1) or (2)
3. The electric power steering device according to item 1, wherein the rotational output of the electric motor is transmitted to the speed reduction mechanism via an Oldham shaft coupling.