A carbon brush holder for an electric machine
By combining the brush holder with the plug-in terminal, the brush box snap-fit design, and the reinforcing rib design, the problems of inconvenient and unreliable connection of existing carbon brush holders are solved, resulting in a carbon brush holder with simple structure, convenient assembly, and reliable connection.
Patent Information
- Application Number
- CN202423264164.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The existing carbon brush holder structure is complex, and the connection between the brush holder and the carbon brush wire is inconvenient and unreliable, making assembly inconvenient and performance unreliable.
The design adopts a brush holder and plug-in terminal connection. The brush holder and brush wire are connected by plug-in connection. The brush box and brush holder are connected by snap-fit. The support arm and contact arm are equipped with reinforcing ribs. The coil spring and carbon brush contact through the arc-shaped protrusion. The brush box is equipped with elastic contact piece.
This design achieves a simple structure, stable and reliable performance, convenient assembly, and reliable connection for the carbon brush holder, thereby improving assembly efficiency and operational reliability.
Smart Images
Figure CN223612821U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a carbon brush holder of motor. BACKGROUND
[0002] Carbon brush is also called brush, as a kind of sliding contact, is widely used in many electrical equipment. Carbon brush in product application material mainly has graphite, impregnated graphite, metal (containing copper, silver) graphite. Carbon brush is the fixed part and rotating part between energy or signal transmission device of motor or generator or other rotating machinery, it is generally pure carbon plus solidifying agent, the appearance is generally square, card in metal support, inside has spring and tightly press in the rotating shaft, motor rotates, will electric energy be delivered to coil through commutator. The structure design of existing carbon brush holder is complex, the brush holder of this carbon brush holder is inconveniently connected with the brush wire of carbon brush, the connection of brush holder and brush wire is unreliable, and the carbon brush holder also has the defects of inconvenient assembly and unreliable performance. SUMMARY
[0003] The utility model aims at overcoming the defects of prior art, provide a kind of structure simple, performance stable and reliable, assembly convenient, reliable connection's carbon brush holder of motor.
[0004] To achieve the above object, the utility model uses a kind of carbon brush holder of motor, including brush holder, the brush box of setting on brush holder, plug-in terminal, the accommodating cavity for placing carbon brush is formed between the brush holder and the brush box, the support arm for placing coil spring is formed in the one side of the brush holder, the installation clamping groove matched with coil spring is formed on support arm, the coil spring is clamped in installation clamping groove, the one end of the plug-in terminal has the crimping portion matched with the brush wire of carbon brush, the other end of the plug-in terminal has the plug-in slot matched with brush holder, the other side of the brush holder has the contact arm matched with plug-in terminal, the plug-in slot of the plug-in terminal is inserted in the plug-in slot of the contact arm.
[0005] The beneficial effects of the above structure are: the brush wire of carbon brush is connected with brush holder by plug-in terminal, brush holder and brush wire are connected by plug-in mode, so as to facilitate the assembly of brush wire and brush holder, and the connection of brush holder and brush wire can be more reliable. Coil spring is clamped on the support arm of brush holder, so as to facilitate the assembly of coil spring and brush holder, and the assembly is more convenient. Therefore, the carbon brush holder of motor has the advantages of simple structure, stable and reliable performance, convenient assembly and reliable connection.
[0006] In particular, the brush box is provided with a plurality of clamping pieces arranged in a rectangular array, the brush holder is provided with a plurality of clamping holes matched with the clamping pieces, and the clamping pieces are clamped in the clamping holes to form the clamping cooperation between the brush holder and the brush box. The brush box and the brush holder are assembled by clamping cooperation, and the assembly efficiency is higher.
[0007] Particularly, the one end of the coil spring is provided with a contact sheet matched with the carbon brush, the one end of the carbon brush is provided with a contact groove matched with the contact sheet, and the one end of the contact sheet is provided with an arc convex part extending in the accommodating cavity and abutting in the contact groove of the carbon brush. The contact sheet of the coil spring is contacted with the carbon brush through the arc convex part, so that the contact between the coil spring and the carbon brush is more reliable.
[0008] Particularly, the brush holder is provided with a plurality of mounting pins arranged in a rectangular array respectively, and the two sides of the mounting pin are respectively provided with anti-dropping barbs. The brush holder is provided with a plurality of mounting pins, so that the plug-in mounting of the carbon brush holder is realized, the anti-dropping barbs can prevent loosening, and the mounting of the carbon brush holder is more firm.
[0009] Particularly, the bending part of the supporting arm is provided with a reinforcing rib. The reinforcing rib can enhance the overall strength of the supporting arm, avoid deformation of the supporting arm due to vibration, and thus improve the working reliability of the carbon brush holder.
[0010] Particularly, the bending part of the contact arm is provided with a reinforcing convex rib. The reinforcing convex rib can enhance the overall strength of the contact arm, avoid deformation of the contact arm due to vibration, and thus ensure the connection of the contact arm and the plug-in terminal to be more reliable.
[0011] Particularly, the outer wall of the brush box is provided with an elastic contact sheet, and the elastic contact sheet is provided with a contact silver dot. The brush box is provided with an elastic contact sheet, so that the contact pressure of the brush box is increased, and the contact reliability is higher. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a perspective view of an embodiment of the utility model.
[0013] Fig. 2 It is an exploded view of an embodiment of the utility model.
[0014] Fig. 3 It is a perspective view of a brush box of an embodiment of the utility model. DETAILED DESCRIPTION
[0015] As Figs. 1-3As shown, this utility model embodiment is a carbon brush holder for an electric motor, including a brush holder 10, a brush box 11 disposed on the brush holder 10, and a plug-in terminal 12. A receiving cavity 100 for placing carbon brushes 13 is formed between the brush holder 10 and the brush box 11. One side of the brush holder 10 has a support arm 101 for placing a coil spring 14. The support arm 101 is provided with a mounting slot 102 that cooperates with the coil spring 14. The coil spring 14 is engaged in the mounting slot 102. One end of the plug-in terminal 12 has a crimping part 121 that crimps the brush wire 131 of the carbon brush 13. The other end of the plug-in terminal 12 has a plug-in groove 122 that cooperates with the brush holder 10. The other side of the brush holder 10 has a contact arm 103 that cooperates with the plug-in terminal 12. The contact arm 103 has an insert part 104 that passes through the slot 122 of the plug-in terminal 12. The brush holder 11 is provided with a plurality of snap-fit tabs 111 arranged in a rectangular array, and the brush holder 10 is provided with a plurality of snap-fit holes 105 that mate with the snap-fit tabs 111. The snap-fit tabs 111 are respectively engaged in the snap-fit holes 105, forming a snap-fit engagement between the brush holder 10 and the brush holder 11. The brush holder and brush holder are assembled using a snap-fit engagement method, which improves assembly efficiency.
[0016] like Fig. 1 and 2 As shown, one end of the coil spring 14 has a contact piece 141 that mates with the carbon brush 13. One end of the carbon brush 13 has a contact groove 132 that mates with the contact piece 141. One end of the contact piece 141 has an arc-shaped protrusion 142 extending into the receiving cavity 100, and the arc-shaped protrusion 142 abuts against the contact groove 132 of the carbon brush 13. The contact piece of the coil spring contacts the carbon brush through the arc-shaped protrusion, thus ensuring more reliable contact between the coil spring and the carbon brush. The brush holder 10 has multiple mounting pins 106 arranged in a rectangular array. Anti-loosening barbs 107 are provided on both sides of each mounting pin 106. The multiple mounting pins on the brush holder allow for plug-in installation of the carbon brush holder, and the anti-loosening barbs prevent loosening, ensuring a more secure installation of the carbon brush holder. The support arm 101 has reinforcing ribs 1011 at its bend. The reinforcing ribs enhance the overall strength of the support arm, preventing deformation due to vibration and thus improving the reliability of the carbon brush holder. Reinforcing ribs 1031 are provided at the bends of the contact arm 103. These ribs enhance the overall strength of the contact arm, preventing deformation due to vibration and ensuring a more reliable connection between the contact arm and the plug-in terminal. An elastic contact piece 112 with contact silver dots 113 is provided on the outer wall of the brush holder 11. The elastic contact piece increases the contact pressure and improves contact reliability.
[0017] The brush wire of the carbon brush is connected with the brush holder through the plug-in terminal, and the brush holder and the brush wire are connected in a plug-in mode, so that the assembly of the brush wire and the brush holder is facilitated, and the connection of the brush holder and the brush wire is more reliable. The coil spring is clamped on the supporting arm of the brush holder, so that the assembly of the coil spring and the brush holder is facilitated and more convenient. Therefore, the carbon brush holder of the motor has the advantages of simple structure, stable and reliable performance, convenient assembly and reliable connection.
Claims
1. A carbon brush holder for an electric machine, characterized by: The utility model relates to a carbon brush structure, including brush holder, set up brush box on brush holder, plug-in terminal, the brush holder with brush box between form has for placing carbon brush accommodation cavity, the brush holder one side has for placing the support arm of coil spring, support arm is provided with the installation card slot with coil spring cooperation, coil spring is clamped in installation card slot, the plug-in terminal one end has with the electric brush line of carbon brush pressure joint pressure joint part, the plug-in terminal other end has with the plug-in slot cooperation of brush holder, the brush holder other side has with the contact arm cooperation of plug-in terminal, the contact arm has the insertion piece part of wearing in the plug-in slot of plug-in terminal.
2. The carbon brush holder of an electric machine according to claim 1, characterized in that: The brush box is provided with a plurality of clamping pieces in a rectangular array, the brush holder is provided with a plurality of clamping holes matched with the clamping pieces, the clamping pieces are clamped in the clamping holes, and the brush holder and the brush box are clamped and matched.
3. A carbon brush holder for an electric machine according to claim 1 or 2, characterized in that: The coil spring has a contact piece matched with the carbon brush, the carbon brush is provided with a contact groove matched with the contact piece, and the contact piece has an arc convex portion extending into the accommodation cavity.
4. A carbon brush holder for an electric machine according to claim 1 or 2, characterized in that: The brush holder is provided with a plurality of mounting pins in a rectangular array, and the mounting pins are provided with anti-dropping barbs on both sides.
5. A carbon brush holder for an electric machine according to claim 1 or 2, characterized in that: The bending part of the support arm is provided with a reinforcing rib.
6. A carbon brush holder for an electric machine according to claim 1 or 2, characterized in that: The bending part of the contact arm is provided with a reinforcing convex rib.
7. A carbon brush holder for an electric machine according to claim 1 or 2, characterized in that: The brush box is provided with an elastic contact piece on the outer wall, and the elastic contact piece is provided with a contact silver dot.