Actuator

Patent metadata

Field	Value
Publication number	US-11114919-B2
Application number	US-201916528669-A
Country	US
Kind code	B2
Filing date	Aug 1, 2019
Priority date	Aug 1, 2018
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

An actuator is provided which comprises an actuator housing having an inside surface defining a stator-receiving portion and a stator. The stator-receiving portion comprises a rotor support element, and plurality of guide projections which are spaced-apart about the rotor support element, the plurality of stator-abutment projections being integrally formed with the inside surface. The stator has a plurality of locator recesses which are engagable with the plurality of stator-abutment projections when the stator is received at the stator-receiving portion of the actuator housing to locate the stator relative to the actuator housing.

First claim

The invention claimed is:

1. An actuator comprising:
an actuator housing having an inside surface defining a stator-receiving portion, the stator-receiving portion comprising a rotor support element, and a plurality of stator-abutment projections which are spaced-apart about the rotor support element, the plurality of stator-abutment projections being integrally formed with the inside surface; and
a stator having a plurality of locator recesses which are abuttably engagable with the plurality of stator-abutment projections when the stator is received at the stator-receiving portion of the actuator housing to locate the stator relative to the actuator housing,
each said stator-abutment projection comprises a central support and a locator head extending laterally from the central support, and a rotor-facing surface of each the locator heads towards the rotor support element, and the rotor-facing surface of each locator head contacts a rotor-proximate inner surface of the locator recess when the stator is received at the stator-receiving portion.

2. The actuator as claimed in claim 1 , wherein each locator head has an arcuate or substantially arcuate or trapezoidal profile.

3. The actuator as claimed in claim 1 , wherein each locator recess of the stator is formed by a pair of lateral projections extending from the stator.

4. The actuator as claimed in claim 1 , wherein the plurality of stator-abutment projections is equi-angularly spaced around the rotor support element.

5. The actuator as claimed in claim 1 , wherein the stator is a star-shaped stator comprising a plurality of stator elements and a coil body with which the plurality of stator elements is engagable.

6. The actuator as claimed in claim 5 , wherein each stator element includes a central locator arm insertable into the coil body and a pair of outer arms engagable about the coil body, each of the outer arms including a stop for at least in part forming a said locator recess.

7. The actuator as claimed in claim 5 , wherein each locator recess is formed at an interface between adjacent stator elements.

8. The actuator as claimed in claim 5 , wherein a number of the stator elements is equal to a number of the stator-abutment projections.

9. The actuator as claimed in claim 1 , wherein the stator-receiving portion further comprises a plurality of secondary guide elements for aligning the stator, the secondary guide elements being provided as upstanding stator-arm support walls.

10. The actuator as claimed in claim 1 , wherein the stator-abutment projections in use abut against an outer surface of the stator.

11. An actuator comprising:
an actuator housing having an inside surface defining a stator-receiving portion, the stator-receiving portion comprising a rotor support element, and a plurality of stator-abutment projections which are spaced-apart about the rotor support element, the plurality of stator-abutment projections being integrally formed with the inside surface; and
a stator having a plurality of locator recesses which are abuttably engagable with the plurality of stator-abutment projections when the stator is received at the stator-receiving portion of the actuator housing to locate the stator relative to the actuator housing,
and each said stator-abutment projection comprises a central support and a locator head extending laterally from the central support, and each locator recess of the stator is formed by a pair of lateral projections extending from the stator.

12. The actuator as claimed in claim 11 , wherein the plurality of stator-abutment projections is equi-angularly spaced around the rotor support element.

13. The actuator as claimed in claim 11 , wherein the stator is a star-shaped stator comprising a plurality of stator elements and a coil body with which the plurality of stator elements is engagable.

14. The actuator as claimed in claim 13 , wherein each stator element includes a central locator arm insertable into the coil body and a pair of outer arms engagable about the coil body, each of the outer arms including a stop for at least in part forming a said locator recess.

15. The actuator as claimed in claim 11 , wherein the stator-receiving portion further comprises a plurality of secondary guide elements for aligning the stator, the secondary guide elements being provided as upstanding stator-arm support walls.

Assignees

• Johnson Electric Int Ag

Inventors

• Bourqui Yvan
• Soncini Daniel
• Haenni Frederic

Classifications

• H02K1/185

  to outer stators · CPC title

• H02K37/16

  having horseshoe armature cores · CPC title

• H02K7/116 Primary

  with gears · CPC title

• H02K5/04 Primary

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• H02K15/14

  Casings; Enclosures; Supports · CPC title