Electric actuator

Patent metadata

Field	Value
Publication number	US-11054016-B2
Application number	US-201716082966-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Mar 30, 2016
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

Provided is an electric actuator, including: a drive part ( 2 ); a motion conversion mechanism part ( 3 ) configured to convert a rotary motion from the drive part ( 2 ) into a linear motion in an axial direction parallel with an output shaft of the drive part ( 2 ); a driving force transmission part ( 4 ) configured to transmit a driving force from the drive part ( 2 ) to the motion conversion mechanism part ( 3 ); and a motion-conversion-mechanism support part ( 5 ) configured to support the motion conversion mechanism part ( 3 ), and wherein the drive part ( 2 ) and the motion-conversion-mechanism support part ( 5 ) are capable of being coupled to and decoupled from the driving force transmission part ( 4 ).

First claim

The invention claimed is:

1. An electric actuator, comprising:
a drive part;
a motion conversion mechanism part configured to convert a rotary motion from the drive part into a linear motion in an axial direction parallel with an output shaft of the drive part;
a driving force transmission part configured to transmit a driving force from the drive part to the motion conversion mechanism part;
a motion-conversion-mechanism support part configured to support the motion conversion mechanism part; and
a shaft case, which is configured to accommodate a shaft portion of the motion conversion mechanism part configured to perform the linear motion,
wherein the drive part comprises a driving motor and a motor case configured to accommodate the driving motor,
wherein the driving force transmission part comprises a transmission gear mechanism configured to transmit the driving force from the drive part to the motion conversion mechanism part, and a transmission gear case configured to accommodate the transmission gear mechanism,
wherein the motion-conversion-mechanism support part comprises a support bearing configured to support the motion conversion mechanism part, and a bearing case configured to accommodate the support bearing,
wherein the drive part and the motion-conversion-mechanism support part are capable of being coupled to and decoupled from the driving force transmission part, and
wherein the shaft case is capable of being coupled to and decoupled from the bearing case from a side of the bearing case that is opposite to a side of the bearing case at which the transmission gear case is located.

2. The electric actuator according to claim 1 ,
wherein the drive part comprises a motor part and a speed reduction mechanism part,
wherein the motor part comprises the driving motor and the motor case configured to accommodate the driving motor,
wherein the speed reduction mechanism part comprises a speed reduction gear mechanism configured to reduce a speed of the driving force of the driving motor and output the driving force, and a speed reduction gear case configured to accommodate the speed reduction gear mechanism, and
wherein the speed reduction mechanism part is capable of being coupled to and decoupled from the motor part and the driving force transmission part.

3. The electric actuator according to claim 1 , further comprising a lock mechanism part configured to prevent the motion conversion mechanism part from driving is provided to the shaft case.

4. The electric actuator according to claim 1 , wherein the drive part and the motion-conversion-mechanism support part are capable of being coupled to and decoupled from the driving force transmission part in a direction of the output shaft of the driving motor.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Matsuto Takushi
• Hirano Shinsuke
• Ikeda Atsushi
• Ishikawa Tomomi

Classifications

• F16H25/20 Primary

  Screw mechanisms (with automatic reversal F16H25/12) · CPC title

• F16D65/14

  Actuating mechanisms for brakes; Means for initiating operation at a predetermined position (brake control systems, parts thereof B60T) · CPC title

• F16H25/22

  with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members · CPC title

• F16H25/2204

  with balls · CPC title

• F16H2025/2031

  Actuator casings · CPC title