Direct current machine

• US 8,405,257 B2
• Filed: 02/06/2008
• Issued: 03/26/2013
• Est. Priority Date: 03/30/2007
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Maurer, Erik, Winkler, Wolfgang, Heidrich, Markus
• Primary Examiner(s): Nguyen, Tran N.
• Assistant Examiner(s): SCHEUERMANN, DAVID W
• Application Number:
  US12/594,109
• Publication Number:
  US 20100045128A1
• Time in Patent Office: 1,875 Days
• Field of Search: 310/43, 310/71, 310/89, 310/177, 310239-247
• US Class Current: 310/43
• CPC Class Codes: H02K 5/148 Slidably supported brushes
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

The invention relates to a DC current machine, in particular a DC current motor for driving a blower of a motor vehicle, with a pole housing forming the stator of the machine, a rotor that is rotatably mounted in two bearing plates, and with a brush support for supplying current to the rotor. According to the invention, a support is integrated into the brush support, with de-tensioning for the electrical connecting cables of the machine, which means that a secure fastening, de-tensioning, and insulation of the connecting cables is achieved without additional components and without additional expense in the assembly of the machine.

Claims

1. A direct current machine for driving a blower of a motor vehicle, comprising:

a pole housing forming a stator of the machine;

a rotor rotatably supported in two bearing plates;

a brush support for supplying current to the rotor; and

a mount with tension relief for electrical connection cables of the machine being integrated with the brush support,

wherein the mount has one separate strut for each of the electrical connection cables.

2. The direct current machine as defined by claim 1, wherein the mount for the electrical connection cables is embodied in one piece with the brush support.

3. The direct current machine as defined by claim 1, wherein the brush support and the mount for the connection cables are a one piece plastic injection-molded part.

4. The direct current machine as defined by claim 2, wherein the brush support and the mount for the connection cables are a one piece plastic injection-molded part.

5. The direct current machine as defined by claim 1, wherein the strut is elastically deformable.

6. The direct current machine as defined by claim 2, wherein the strut is elastically deformable.

7. The direct current machine as defined by claim 1, wherein the mount for the connection cables is fastened between the pole housing and a bearing plate, and a force that reduces a receiving cross section for the connection cable is exerted on the struts.

9. The direct current machine as defined by claim 1, wherein the struts protrude into recesses of the pole housing.

11. The direct current machine as defined by claim 1, wherein the struts are embodied essentially in the form of segments of a circle.

13. The direct current machine as defined by claim 11, wherein the struts have a thickened beadlike portion on their open end.

15. The direct current machine as defined by claim 1, wherein the struts include a concave portion and are configured to support a portion of the electrical connection cables in the concave portion.

17. The direct current machine as defined by claim 1, wherein the struts protrude downwards from the mount.

8. A direct current machine for driving a blower of a motor vehicle, comprising:

a pole housing forming a stator of the machine;

a rotor rotatably supported in two bearing plates;

a brush support for supplying current to the rotor; and

a mount with tension relief for electrical connection cables of the machine being integrated with the brush support,

wherein separate mounting struts for each connection cable are integrally molded onto the mount on one side.

10. The direct current machine as defined by claim 8, wherein the struts protrude into recesses of the pole housing.

12. The direct current machine as defined by claim 8, wherein the struts are embodied essentially in the form of segments of a circle.

14. The direct current machine as defined by claim 12, wherein the struts have a thickened beadlike portion on their open end.

16. The direct current machine as defined by claim 8, wherein the struts include a concave portion and are configured to support a portion of the electrical connection cables in the concave portion.

18. The direct current machine as defined by claim 8, wherein the struts protrude downwards from the mount.