JPH0237583U

JPH0237583U -

Info

Publication number: JPH0237583U
Application number: JP11356088U
Authority: JP
Priority date: 1988-08-30
Filing date: 1988-08-30
Publication date: 1990-03-13

Description

[Brief explanation of drawings]

第１図は本考案の第１の実施例のステツピング
モータを示す断面図、第２図は本考案の第２の実
施例の要部を示す断面図、第３図は従来のステツ
ピングモータを示す断面図、第４図はその異なる
従来の第２のスラスト軸受の構造を示す断面図で
ある。４……滑り軸受、６……モータ軸、６ａ……リ
ードスクリユー部、１５……第１のスラスト軸受
、１６……第２のスラスト軸受、３２……鋼球、
３３……滑り軸受部。 Fig. 1 is a cross-sectional view showing a stepping motor according to a first embodiment of the present invention, Fig. 2 is a cross-sectional view showing main parts of a second embodiment of the present invention, and Fig. 3 is a conventional stepping motor. FIG. 4 is a cross-sectional view showing the structure of a different conventional second thrust bearing. 4... Sliding bearing, 6... Motor shaft, 6a... Lead screw portion, 15... First thrust bearing, 16... Second thrust bearing, 32... Steel ball,
33...Sliding bearing part.

Claims

[Scope of utility model registration request]

A motor shaft having a lead screw portion formed on the outer periphery for moving the object to be transported is provided, a sliding bearing for rotatably supporting the motor shaft is provided on the motor shaft, and one end of the motor shaft is provided with a sliding bearing for rotatably supporting the motor shaft. A first thrust bearing that presses the motor shaft in the axial direction is provided, and a second thrust bearing is provided at the other end that rotatably receives the pressed motor shaft and restrains the motor shaft from moving in the axial direction. In the stepping motor, the second thrust bearing includes a sliding bearing that rotatably supports the outer periphery of the end of the motor shaft, and a sliding bearing that faces the end surface of the motor shaft and whose center coincides with the axial center line of the motor shaft. 1. A stepping motor comprising: a steel ball which is arranged to receive the motor shaft;