Linear actuator

Patent metadata

Field	Value
Publication number	US-10094463-B2
Application number	US-201615552110-A
Country	US
Kind code	B2
Filing date	Mar 4, 2016
Priority date	Mar 6, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

The at least one conducting component may be separated from the group of mechanical, non-conducting components by at least one seal in such a way that two mutually separate spaces sealed off from one another are formed within the housing.

First claim

The invention claimed is:

1. A linear actuator, having a housing and having a plurality of components arranged in the housing, the linear actuator comprising:
at least one conducting component;
a group of mechanical, non-conducting components, which comprise components of a spindle mechanism;
at least one bearing arrangement designed to support components of the spindle mechanism in the housing;
the at least one conducting component being separated from the group of mechanical, non-conducting components by at least one seal in such a way that two mutually separate spaces sealed off from one another are formed within the housing; and
a continuous housing wall of the housing surrounds the two spaces, wherein a first of the spaces contains the conducting components and is subdivided into two subspaces, and wherein an electric motor is arranged in a first subspace and a sensor-system component is arranged in a second subspace.

2. The actuator as claimed in claim 1 , wherein the continuous housing wall is formed by a metal profile and bounding both spaces.

3. The actuator as claimed in claim 1 , wherein a ventilation element is arranged in a second of the spaces in which the group of mechanical, non-conducting components, including a component which can be extended out of the space, is situated.

4. The actuator as claimed in claim 3 , wherein the ventilation element is selected from the group of ventilation elements which comprises a diaphragm and a double diaphragm valve.

5. The actuator as claimed in claim 3 , wherein the ventilation element is integrated into a cover which closes off the housing at an end, wherein it is spaced apart radially from the component which can be extended out of the space.

6. The actuator as claimed in claim 1 , wherein only a second of the spaces in which the group of mechanical, non-conducting components is situated has at least one lubricant feed.

7. The actuator as claimed in claim 1 , wherein the two subspaces are arranged adjacent to one another, when viewed in a cross section through the housing, and are accessible from one end.

8. The actuator as claimed in claim 1 , wherein the two subspaces have different cross sections, when viewed in a cross section through the housing, and are of different lengths, measured in an axial direction of the spindle mechanism.

9. The actuator as claimed in claim 7 , wherein the first subspace, in which the electric motor is situated, is arranged as a linear extension of the spindle mechanism, and the second subspace, in which at least one sensor-system component interacting with the spindle mechanism is situated, is arranged parallel to a center line of the spindle mechanism ( 7 ), extending over a majority of a length of the housing, wherein a partition wall of the housing delimits the second subspace both with respect to the first subspace and with respect to a second of the spaces in which the group of mechanical, non-conducting components is situated.

10. The actuator as claimed in claim 7 , wherein a centering receptacle for a limit switch is arranged in an axially longer sub-space of the first space in which the conducting component is situated.

11. The actuator as claimed in claim 7 , wherein a receptacle for a circuit board is arranged in an axially longer subspace of the first space in which the conducting component is situated.

12. A linear actuator, comprising:
a column-shaped housing including a housing wall;
a conducting component;
a group of mechanical, non-conducting components including components of a spindle mechanism;
at least one bearing arrangement designed to support components of the spindle mechanism in the housing;
the conducting component being separated from the group of mechanical, non-conducting components by at least one seal in such a way that two mutually separate spaces sealed off from one another are formed within the housing, a first space and a second space; and
the housing wall surrounding the two spaces, wherein the first space contains the conducting component and is subdivided into two subspaces, and wherein an electric motor is arranged in a first subspace and a sensor-system component is arranged in a second subspace.

13. The actuator as claimed in claim 12 , wherein the housing wall is formed by a metal profile and bounding both spaces.

14. The actuator as claimed in claim 12 , wherein a ventilation element is arranged in the second space in which the group of mechanical, non-conducting components, including a component which can be extended out of the space, is situated.

15. The actuator as claimed in claim 14 , wherein the ventilation element includes a diaphragm or a double diaphragm valve.

16. The actuator as claimed in claim 14 , wherein the ventilation element is integrated into a cover which closes off the housing at an end, wherein it is spaced apart radially from the component which can be extended out of the space.

17. The actuator as claimed in claim 12 , wherein the two subspaces are arranged adjacent to one another, when viewed in a cross section through the housing, and are accessible from one end.

18. The actuator as claimed in claim 17 , wherein a centering receptacle for a limit switch is arranged in an axially longer sub-space of the first space in which the conducting component is situated.

19. The actuator as claimed in claim 17 , wherein a receptacle for a circuit board is arranged in an axially longer subspace of the first space in which the conducting component is situated.

20. The actuator as claimed in claim 12 , wherein the two subspaces have different cross sections, when viewed in a cross section through the housing, and are of different lengths, measured in an axial direction of the spindle mechanism.

Assignees

• Schaeffler Technologies Ag

Inventors

• Heipt Peter
• Daniel Patrick
• Rudy Bettina

Classifications

• F16H57/0497

  Screw mechanisms · CPC title

• F16H35/18

  Turning devices for rotatable members, e.g. shafts · CPC title

• F16H2025/2075

  Coaxial drive motors · CPC title

• F16H2025/2034

  Extruded frame casings · CPC title

• F16H57/12

  Arrangements for adjusting or for taking-up backlash not provided for elsewhere · CPC title