Excitation device

• US 10,389,076 B2
• Filed: 09/30/2018
• Issued: 08/20/2019
• Est. Priority Date: 03/30/2016
• Status: Active Grant

• Current Assignee: Zhongguo Liang
• Original Assignee: Zhongguo Liang
• Inventors: Liang, Zhongguo, Liang, Shidi, Luan, Xu, Dong, Xinyi
• Primary Examiner(s): Le, Dang D
• Application Number:
  US16/147,816
• Publication Number:
  US 20190052039A1
• Time in Patent Office: 324 Days
• CPC Class Codes: H01R 2201/10 for dynamoelectric machines
• CPC Class Codes: H01R 39/381 characterised by the application of pressure to brush
• CPC Class Codes: H01R 39/385 Means for mechanical fixation of the brush holder
• CPC Class Codes: H01R 39/415 with self-recoiling spring
• CPC Class Codes: H01R 39/46 Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
• CPC Class Codes: H02K 13/105 Spark suppressors associated with the commutator
• CPC Class Codes: H02K 2205/06 Machines characterised by means for keeping the brushes in a retracted position during assembly
• CPC Class Codes: H02K 5/145 Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes

Abstract

Disclosed is an excitation device which includes a brush holder base. The brush holder base is provided with a plug. The plug is provided with a brush holder shaft. The front end of the brush holder shaft is provided with a brush box. A horizontal taper dovetail groove is formed in the brush holder base. A horizontal taper dovetail lug boss is disposed on the plug. The dovetail groove is matched with the dovetail lug boss. The present invention solves the problem of potential safety hazard in locking, and ensures safe and smooth operation of a unit.

Claims

1. An excitation device, comprising a brush holder base, wherein the brush holder base is provided with a plug;

the plug is provided with a brush holder shaft;

the front end of the brush holder shaft is provided with a brush box;

a horizontal taper dovetail groove is formed in the brush holder base;

a horizontal taper dovetail lug boss is disposed on the plug;

the horizontal taper dovetail groove is matched with the horizontal taper dovetail lug boss;

a leaf spring brush locking press plate is disposed on the front end of the brush holder shaft;

the brush holder shaft is provided with a roller shaft mechanism which contacts with the leaf spring brush locking press plate;

the leaf spring brush locking press plate comprises an upper press plate and a lower press plate;

a press head is disposed on the front end of the upper press plate;

the lower press plate and the upper press plate are assembled and connected through copper rivets;

the roller shaft mechanism comprises a roller shaft rod installed on the brush holder shaft;

a roller is disposed on the roller shaft rod;

the roller contacts with a bottom surface of the lower press plate; and

the roller shaft rod is connected with the brush holder shaft through a roller nut.

2. The excitation device according to claim 1, wherein vertical inclined angles of the horizontal taper dovetail groove and the horizontal taper dovetail lug boss are respectively 26°

-28°

, and horizontal inclined angles are respectively 73°

-75°

.

3. The excitation device according to claim 1, wherein a brush handle is disposed on the rear end of the brush holder shaft;

a baffle plate is disposed between the brush handle and the brush holder shaft; and

a spring is disposed on the brush holder shaft near the brush handle end.

4. The excitation device according to claim 3, wherein the upper end of the spring is provided with a first spring bowl;

the lower end of the spring is provided with a second spring bowl;

the first spring bowl is larger than the second spring bowl; and

the first spring bowl is matched with the second spring bowl.

5. The excitation device according to claim 1, wherein the press head is riveted on a leaf spring of the front end of the upper press plate.

6. The excitation device according to claim 1, wherein a prepressing and positioning pin for prepressing and locking the plug is disposed on the brush holder shaft;

a helix angle is also disposed on the plug; and

the prepressing and positioning pin rotates within a range limited by the helix angle.

7. The excitation device according to claim 1, wherein a locking and positioning pin is disposed on the brush holder shaft.