CN202586036U - Safety carbon brush for electric drill - Google Patents
Safety carbon brush for electric drill Download PDFInfo
- Publication number
- CN202586036U CN202586036U CN 201220218111 CN201220218111U CN202586036U CN 202586036 U CN202586036 U CN 202586036U CN 201220218111 CN201220218111 CN 201220218111 CN 201220218111 U CN201220218111 U CN 201220218111U CN 202586036 U CN202586036 U CN 202586036U
- Authority
- CN
- China
- Prior art keywords
- carbon brush
- spring
- safety
- circular hole
- brush holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a safety carbon brush for an electric drill. The safety carbon brush comprises a carbon brush seat, a cylindrical boss on the carbon brush seat, and a connecting spring, wherein one end of the connecting spring wraps the cylindrical boss on the carbon brush seat and is in contact with the carbon brush seat; a circular hole is formed in the carbon brush seat; a safety spring is arranged on the bottom of the circular hole; the surface of the safety spring is subjected to insulating treatment; a metal piece of which the size is the same as the hole size of the circular hole presses on the upper part of the safety spring, so that the safety spring is in a compression state; and carbon powder is filled in a part on the metal piece in the circular hole. The connecting spring can compensate for the wear of the contact surface of the carbon brush and can transfer a part of heat, so that heat of the carbon brush seat can be dissipated in time, and the service life is prolonged; besides, the connecting spring also serves as an electric conduction part to conduct currents; and the insulating spring is arranged in the carbon brush seat and serves as a safety device, and the insulating spring pops up when the carbon powder is worn to reach the edge of the insulating spring, so that the carbon brush is disconnected from a motor, and the motor stops running and is prevented from being burnt.
Description
Technical field
The utility model relates to a kind of carbon brush, in particular for the carbon brush of electric drill.
Background technology
Electric drill is the device that transmits energy or signal between standing part and the rotating part of motor or generator or other rotating machineries with the insurance carbon brush, and it generally is that pure carbon adds coagulating agent and processes, and external form generally is a square; Be stuck on the metallic support, have lead to draw on the top, in running up; The carbon brush conduction current, because and CONTACT WITH FRICTION between the rotor of carbon brush holder and electric drill, make the surface that abrasion take place and also produce hot; Heat can't in time shed, and shorten useful life.In addition, the carbon brush majority also comprises draws lead, carbon brush head, and this has not only increased the weight of carbon brush, and has increased manufacturing cost; In the course of the work, the carbon of carbon brush cognition constantly is worn, and when the carbon body may wear to a certain degree, copper sheathing can directly contact with motor, causes burn-down of electric motor.
The utility model content
The technical problem that the utility model will solve provides a kind of electric drill that can increase the service life with the insurance carbon brush.
For addressing the above problem; The technical scheme that the utility model adopts is: a kind of electric drill is with the insurance carbon brush, the cylindrical boss that comprises carbon brush holder, carbon brush holder top with is connected spring, an end that connects spring wraps up the cylindrical boss on the carbon brush holder and contacts with carbon brush holder; Have a circular hole on the carbon brush holder; A safety spring is equipped with in the circular hole bottom, and the safety spring surface is done insulation and handled, and safety spring top is pushed down by big sheet metals such as a slice and circular holes; Make safety spring be in compressive state, the partially filled carbon dust of the circular hole above the sheet metal.
As the further improved technical scheme of the utility model, said carbon brush holder is provided with 4 chamferings, and 4 chamferings are separately positioned on four long limits of carbon brush holder.
As the further improved technical scheme of the utility model, said connection spring material therefor is a hardening stainless steel.
Adopt said structure, connect spring, connect the spring handle carbon brush and be pressed in the rotating shaft as an elastic force apparatus; Promoting carbon brush moves and keeps this carbon brush to contact with the close of electric drill rotor; Prevent the change of carbon brush position, connect the abrasion that spring can compensate the contact surface of carbon brush in addition, transmit a part of heat; The heat of carbon brush holder is in time distributed, increase the service life; In addition, connect spring also as conductive component, conduction current; On carbon brush holder, be provided with insulated spring as safeties, when the carbon body may wear to the spring marginal position, spring promptly ejected, and carbon brush and motor are broken away from, the motor stall, thus the protection motor is not burnt.
Description of drawings
Accompanying drawing 1 is the generalized section of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further specified.
This electric drill is with the insurance carbon brush, the cylindrical boss 2 that comprises carbon brush holder 1, carbon brush holder 1 top with is connected spring 3, an end that connects spring 3 wraps up the cylindrical boss 2 on the carbon brush holder 1 and contacts with carbon brush holder 1; Have a circular hole 5 on the carbon brush holder 1; A safety spring 6 is equipped with in circular hole 5 bottoms, and safety spring 6 surfaces are done insulation and handled, and safety spring 6 tops are pushed down by big sheet metals 7 such as a slice and circular holes 5; Make safety spring 6 be in compressive state, the circular hole 5 partially filled carbon dusts 8 above the sheet metal 7; All be provided with chamfering on four long limits of carbon brush holder, connecting the spring material therefor is SUS631, number of total coils 11, and number of active coils 8, wherein an end and two encloses dextrorotation; Cylindrical boss 2 high 3mm on the carbon brush holder 1, carbon brush holder 1 high 14mm connects spring as an elastic force apparatus in the present embodiment; Connect the spring handle carbon brush and be pressed in the rotating shaft, promoting carbon brush and moving and keep this carbon brush to contact, prevent the change of carbon brush position with the close of this rotor; Connect the abrasion that spring can compensate the contact surface of carbon brush in addition; Transmit a part of heat, the heat of carbon brush holder is in time distributed, increase the service life; In addition, connect spring also as conductive component, conduction current; On carbon brush holder, be provided with insulated spring as safeties, when the carbon body may wear to the spring marginal position, spring promptly ejected, and carbon brush and motor are broken away from, the motor stall, thus the protection motor is not burnt.
Claims (3)
1. an electric drill is with the insurance carbon brush; It is characterized in that: the cylindrical boss (2) that comprises carbon brush holder (1), carbon brush holder (1) top be connected spring (3); Connect the cylindrical boss (2) on the end parcel carbon brush holder (1) of spring (3) and contact, have a circular hole (5) on the carbon brush holder (1), a safety spring (6) is housed bottom the circular hole (5) with carbon brush holder (1); Safety spring (6) surface is done insulation and is handled; Safety spring (6) top is pushed down by a slice and circular hole big sheet metals (7) such as (5), makes safety spring (6) be in compressive state, the partially filled carbon dust of circular hole (5) (8) above the sheet metal (7).
2. electric drill according to claim 1 is with the insurance carbon brush, and its characteristic also is: said carbon brush holder (1) is provided with 4 chamferings (4), and 4 chamferings (4) are separately positioned on four long limits of carbon brush holder (1).
3. electric drill according to claim 1 is with the insurance carbon brush, and its characteristic also is: said connection spring (3) material therefor is a hardening stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218111 CN202586036U (en) | 2012-05-16 | 2012-05-16 | Safety carbon brush for electric drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218111 CN202586036U (en) | 2012-05-16 | 2012-05-16 | Safety carbon brush for electric drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586036U true CN202586036U (en) | 2012-12-05 |
Family
ID=47255407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220218111 Expired - Fee Related CN202586036U (en) | 2012-05-16 | 2012-05-16 | Safety carbon brush for electric drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202586036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427290A (en) * | 2012-05-16 | 2013-12-04 | 海门市海菱碳业有限公司 | Safety carbon brush used for electric drill |
-
2012
- 2012-05-16 CN CN 201220218111 patent/CN202586036U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427290A (en) * | 2012-05-16 | 2013-12-04 | 海门市海菱碳业有限公司 | Safety carbon brush used for electric drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130516 |