Back to results
US 12,379,020 B2Granted
Electric actuator
AssigneeNtn Corporation
InventorsKoji Sato, Shinsuke Hirano
Life of this patent
Estimating the term…
Abstract
A casing 10 that accommodates an electric motor 2 and a ball screw 30 as a motion conversion mechanism 3 includes a first case 11 that is made of an aluminum alloy and accommodates the electric motor 2 and a second case 12 that is coupled to the first case 11 in an axial direction in a state of accommodating the ball screw 30. The electric motor 2 is supported by the second case 12 via a metal bracket 8 and a screw 9, and the entire outer surface of at least one of the metal bracket 8 and the second case 12 is covered with an insulating film C.
Claims4
An electric actuator comprising:
- an electric motor;
- a motion conversion mechanism that converts rotational motion of the electric motor into linear motion;
- and
- a casing that accommodates the electric motor and the motion conversion mechanism,
- the motion conversion mechanism including a nut that rotates in response to the rotational motion of the electric motor, and a screw shaft that moves forward and backward in an axial direction with rotation of the nut,
- characterized in that the casing includes a first case that is made of an aluminum alloy and accommodates the electric motor, and a second case that is made of an aluminum alloy and is coupled to the first case in an axial direction in a state of accommodating the nut and the screw shaft,
- the electric motor is supported by the second case via a metal bracket, and
- an entire surface of at least one of the second case and the metal bracket is covered with an insulating film.
5 more elements
Dependencies are inferred from the claim text.