BREATHER STRUCTURE OF ACTUATOR

• US 20180283524A1
• Filed: 03/27/2018
• Published: 10/04/2018
• Est. Priority Date: 03/31/2017
• Status: Active Grant

• Current Assignee: Nidec Tosok Corporation (Nidec Corporation)
• Original Assignee: Nidec Tosok Corporation (Nidec Corporation)
• Inventors: UEMATSU, Yutaka, SHINKAI, Kazumi, KATO, Shun, KINJO, Shuichi, OSUGA, Kohei, HATSUDA, Tadayuki
• Granted Patent: US 10,443,702 B2
• Time in Patent Office: Days
• CPC Class Codes: F16H 57/027 characterised by means for venting gearboxes, e.g. air breathers
• CPC Class Codes: H02K 2205/09 Machines characterised by drain passages or by venting, breathing or pressure compensating means
• CPC Class Codes: H02K 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 5/15 Mounting arrangements for bearing-shields or end plates
• CPC Class Codes: H02K 5/1732 radially supporting the rotary shaft at both ends of the rotor H02K5/1737 takes precedence
• CPC Class Codes: H02K 7/116 with gears

Abstract

There is provided a breather structure of an actuator in which the breather structure is provided in a housing of the actuator, the breather structure including: a recessed groove positioned on an outer surface of the housing; a breathing hole which is positioned on a bottom surface of the recessed groove and passes through the housing in a first direction; a filter fixed to an inside of the housing so that the filter closes an opening of the breathing hole; a lid body which partially covers a region of the recessed groove including the breathing hole from an outside of the housing when viewed from the first direction; a breather opening portion positioned at a portion of the recessed groove exposed from the lid body; and a protrusion portion which protrudes from the bottom surface of the recessed groove to a side of the lid body.

Claims

1. A breather structure of an actuator in which the breather structure is provided in a housing of the actuator, the breather structure comprising:

a recessed groove positioned on an outer surface of the housing;

a breathing hole which is positioned on a bottom surface of the recessed groove and passes through the housing in a first direction;

a filter fixed to an inside of the housing so that the filter closes an opening of the breathing hole;

a lid body which partially covers a region of the recessed groove including the breathing hole from an outside of the housing when viewed from the first direction;

a breather opening portion positioned at a portion of the recessed groove exposed from the lid body; and

a protrusion portion which protrudes from the bottom surface of the recessed groove to a side of the lid body.

2. The breather structure of an actuator according to claim 1,

wherein the protrusion portion is positioned between the breather opening portion and the breathing hole.

3. The breather structure of an actuator according to claim 2,

wherein the protrusion portion is a wall portion extending along a circumference of the breathing hole.

4. The breather structure of an actuator according to claim 3,

wherein the wall portion includes a through portion which passes through the wall portion in a thickness direction from a side surface thereof.

5. The breather structure of an actuator according to claim 4,

wherein the wall portion surrounds equal to or more than half of the circumference of the breathing hole.

6. The breather structure of an actuator according to claim 4,

wherein the through portion is open to a side opposite to a side of the breather opening portion in plan view.

7. The breather structure of an actuator according to claim 1, further comprising

a plurality of protrusion portions, each of which is the protrusion portion, on the bottom surface of the recessed groove.

8. The breather structure of an actuator according to claim 7,

wherein the plurality of protrusion portions are disposed in a zigzag along a direction in which the recessed groove extends.

9. The breather structure of an actuator according to claim 8,

wherein the lid body is a connection bracket of the actuator.

10. The breather structure of an actuator according to claim 1,

wherein the actuator has a speed reduction mechanism accommodated in the housing,

wherein the housing has a housing main body for holding the speed reduction mechanism and a speed reduction mechanism cover, and

wherein the lid body is a speed reduction mechanism cover of the actuator.

11. The breather structure of an actuator according to claim 8,

wherein the lid body is a portion of a housing of a device connected to the actuator.

12. The breather structure of an actuator according to claim 9,

wherein the actuator is an actuator for a vehicle.