JPS62135548U

JPS62135548U -

Info

Publication number: JPS62135548U
Application number: JP2460586U
Authority: JP
Priority date: 1986-02-21
Filing date: 1986-02-21
Publication date: 1987-08-26
Anticipated expiration: 2001-02-21
Also published as: JPH0514702Y2

Description

[Brief explanation of the drawing]

第１図ないし第４図に、この考案に係るモータ
軸のスラスト軸受の好ましい実施例を示してある
。第１図は、この考案を磁気ヘツド送り用永久磁
石型ステツピングモータに実施した場合のモータ
軸に沿つて切断した一部断面図である。第２図は
スラストばねの好ましい実施例の平面図、第３図
はスラストばねとモータフレームとの関係を示す
一部省略断面図である。第４図は、作用を説明す
るためのモータ軸に沿つた断面図である。第５図
および第６図はモータ軸の従来のスラスト軸受を
示すもので、第５図は第１図に相当するモータ軸
に沿つて切断して示す一部断面図、第６図は第４
図に相当するモータ軸に沿つた断面図である。２１…モータ軸、２３…マグネツト、２５…駆
動コイル、２７…ヘツドフレーム、２８…すべり
軸受、２９…ころがり軸受、３０…スラスト受球
、３１…モータフレーム、３２…凹所、３３…ス
ラストばね、３４…支持板、３５…ばね舌片部、
３６…係止突部、３７…球面。 1 to 4 show preferred embodiments of the thrust bearing for the motor shaft according to this invention. FIG. 1 is a partial sectional view taken along the motor axis when this invention is applied to a permanent magnet type stepping motor for feeding a magnetic head. FIG. 2 is a plan view of a preferred embodiment of the thrust spring, and FIG. 3 is a partially omitted sectional view showing the relationship between the thrust spring and the motor frame. FIG. 4 is a sectional view along the motor shaft for explaining the operation. 5 and 6 show conventional thrust bearings for motor shafts. FIG. 5 is a partial cross-sectional view taken along the motor shaft corresponding to FIG. 1, and FIG.
FIG. 3 is a cross-sectional view along the motor axis corresponding to the figure; 21... Motor shaft, 23... Magnet, 25... Drive coil, 27... Head frame, 28... Sliding bearing, 29... Rolling bearing, 30... Thrust receiving ball, 31... Motor frame, 32... Recess, 33... Thrust spring, 34...Support plate, 35...Spring tongue piece part,
36... Locking protrusion, 37... Spherical surface.

Claims

[Claims for Utility Model Registration] A motor shaft in which the leading end of the motor shaft is supported at at least two places on the frame of a device driven by the motor, and the rear end of the motor shaft is supported in either direction. In a thrust bearing for a motor shaft, in which a thrust receiving ball is buried at an appropriate depth so as to be able to freely rotate, a portion of the motor frame facing the rear end surface of the motor shaft is appropriately bent in the axial direction of the motor shaft. According to the present invention, a thrust spring is provided with a spring tongue portion that presses the thrust receiving ball, and a bearing surface of the spring tongue portion that is pressed against the thrust receiving ball is formed into an appropriate spherical surface. Thrust bearing of motor shaft.