Single axis actuator

Patent metadata

Field	Value
Publication number	US-9759295-B2
Application number	US-201415026077-A
Country	US
Kind code	B2
Filing date	Dec 26, 2014
Priority date	Dec 27, 2013
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A single axis actuator includes a driving-side timing pulley located at one end in a longitudinal direction of a device frame in such a manner that a rotational center thereof is vertically oriented, a rotation transmission shaft coaxially connected to the driving-side timing pulley and extending upwardly, a driven-side timing pulley located at another end in the longitudinal direction of the device frame in such a manner that a rotation shaft thereof is vertically oriented, a timing belt bridged between the driving-side and driven-side timing pulleys, a slider connected to a part of the timing belt to be made movable in the longitudinal direction of the device frame, and a motor having a motor shaft that is connected to an upper end of the rotation transmission shaft.

First claim

The invention claimed is:

1. A single axis actuator, comprising
a driving-side timing pulley located at one end in a longitudinal direction of a device frame in such a manner that a rotational center of the driving-side timing pulley is vertically oriented;
a rotation transmission shaft coaxially connected to the driving-side timing pulley and extending upwardly;
a driven-side timing pulley located at another end of the longitudinal direction of the device frame in such a manner that a rotation shaft of the driven-side timing pulley is vertically oriented;
a timing belt bridged between the driving-side timing pulley and the driven-side timing pulley;
a slider connected to a part of the timing belt to be made movable in the longitudinal direction of the device frame;
a motor having a motor shaft which is connected to an upper end of the rotation transmission shaft;
a cylindrical housing that houses the rotation transmission shaft and the motor shaft and a pulley case that houses the driving-side timing pulley,
wherein the rotation transmission shaft passes through a lower opening portion provided at a lower portion of the housing and an upper opening portion provided at an upper portion of the pulley case to be connected to the driving-side timing pulley, and
a first liquid-tight sealing member is located on a peripheral edge between the lower opening portion of the housing and the upper opening portion of the pulley case, the lower opening portion and the upper opening portion corresponding to each other.

2. The single axis actuator according to claim 1 , wherein the motor is located at an upper portion of the housing, and a second liquid-tight sealing member is located between the motor and a peripheral edge of an upper opening portion of the housing, the motor shaft extending from above the upper opening portion.

3. The single axis actuator according to claim 1 , wherein the driving-side timing pulley, the rotation transmission shaft, the driven-side timing pulley, the timing belt, and the slider are made of a material having corrosion resistance against moisture.

4. The single axis actuator according to claim 2 , wherein the driving-side timing pulley, the rotation transmission shaft, the driven-side timing pulley, the timing belt, and the slider are made of a material having corrosion resistance against moisture.

Assignees

• Nsk Ltd

Inventors

• Taguchi Toshifumi
• Endou Shigeru

Classifications

• F16H2019/0686

  the flexible member being directly driven by a pulley or chain wheel · CPC title

• H02K7/06 Primary

  Means for converting reciprocating motion into rotary motion or vice versa · CPC title

• F16H19/06 Primary

  comprising {flexible members, e.g. an} endless flexible member · CPC title

• F16H19/0672

  characterised by means for tensioning the flexible member · CPC title

• F16H19/0622

  for converting reciprocating movement into oscillating movement and vice versa, the reciprocating movement is perpendicular to the axis of oscillation · CPC title