1. Field of the Invention
The present invention relates to a motor and more particularly, to a carbon brush holder.
2. Description of the Related Art
As shown in
As shown in
The primary objective of the present invention is to provide a carbon brush holder, which may fix the problem of the rivet deformed and loosing.
To achieve this and other objects of the present invention, a carbon brush holder includes an insulating housing, a conductive base fixed to the insulating housing, and an electrical connector connected to the conductive base by a rivet. The conductive base is provided with a slot under a roll portion of the rivet to protect the roll portion from deformation.
Referring to
The insulating housing 50 is a barrel made of Bakelite or other insulating materials, and the conductive base 20 is made of copper or other conductive materials. The conductive base 20 has an end inserted into the insulating housing 50 and fixed therein. The conductive base 20 has a portion left out of the insulating housing 50, on which a through hole 21 and a connecting hole 22 are provided. The electrical connector 30 is provided with a connecting hole 31. The rivet 40 has a head 41 and a post 42. The post 42 of the rivet 40 is inserted into the connecting hole 31 of the electrical connector 30 and the connecting hole 22 of the conductive base 20. A riveter (not shown) is inserted into the through hole 21 to press the post 42 of the rivet 40 that the rivet 40 will have a roll portion 422.
Above elements are as same as the conventional carbon brush holder, and the character of the present invention is described in following:
On an inner side of the conductive base 20 is provided with an annular slot 23 surrounding the connecting hole 22, and an annular protrusion 24 is formed between the slot 23 and the connecting hole 22. As
As shown in
In conclusion, no mater the motor runs for a long time, or the carbon brush is replaced, the rivet will not be deformed and firmly connect the electrical connector 30 and the conductive base 20 together. The present invention will not have a deformed and loosing rivet that will not increase the conduction resistance and generate arc discharge.
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Number | Date | Country | Kind |
---|---|---|---|
97135522 | Sep 2008 | TW | national |