Improved carbon brush holder motor structure

Abstract

The utility model relates to a carbon brush holder improved motor structure, including support, stator piece, rotor piece and carbon brush assembly, the rotor piece includes the pivot and the commutator, and the pivot is through the support and can rotatable installation on the support, and the commutator is installed on the pivot, the stator piece is installed on the support, and is encircled and is equipped with on the outside of rotor piece, the carbon brush assembly includes the brush, the guide piece and the elastic part, the guide piece is installed on the support, and the guide piece has the guide hole that is through the guide piece, and the commutator and the elastic part are located at the both ends of guide hole respectively, and the brush is set in the guide hole, and the elastic part is used for pushing the brush and makes the brush along the radial and the commutator and abuts, the utility model is applicable to the motor technical field, through setting first limit slot can effectively limit the brush position, and through setting second limit slot and third limit slot limit the position of elastic part, guarantee the good contact of carbon brush and commutator, prolong the life of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular discloses an improved motor structure with a carbon brush holder. Background Technology

[0002] A brushed motor is a type of DC motor that converts electrical energy into mechanical energy through the sliding contact between carbon brushes and the commutator. A brushed motor mainly consists of a stator, rotor, carbon brushes, and commutator. The carbon brush is the core component of the brushed motor, responsible for conducting current between the stator and rotor. The brush holder is a crucial component for supporting and fixing the carbon brushes. It secures the carbon brushes in specific positions using slots, ensuring that the brushes do not lose contact due to vibration, centrifugal force, or other factors during motor operation. Simultaneously, spring pressure keeps the carbon brushes tightly pressed against the commutator, ensuring stable and reliable contact. Therefore, the brush holder, as a bridge for current conduction, directly affects the motor's conductivity and stability. However, traditional brush holders suffer from problems such as easy wobbling, cumbersome installation, poor heat dissipation, and unstable brush pressure. For example, when the carbon brush contacts the commutator, it is difficult to ensure that the centerline of the carbon brush and the spring is aligned, resulting in uneven sparking and significant differences in brush wear. Furthermore, traditional brush holders are complex to assemble and inconvenient to maintain. Therefore, it is necessary to improve the existing brush holder structure. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an improved motor structure for carbon brush holder.

[0004] To achieve the above objectives, this utility model provides an improved motor structure with a carbon brush holder, comprising a support, a stator, a rotor, and a carbon brush assembly. The rotor includes a shaft and a commutator. The shaft passes through the support and is rotatably mounted on the support, while the commutator is mounted on the shaft. The stator is mounted on the support and surrounds the outside of the rotor. The carbon brush assembly includes brushes, guide members, and elastic members. The guide members are mounted on the support and have guide holes that penetrate the guide members. The commutator and the elastic members are located at opposite ends of the guide holes. The brushes are movably disposed within the guide holes, and the elastic members are used to push the brushes so that they abut against the commutator radially.

[0005] Furthermore, the guide member is provided with two first limiting grooves, which are recessed from the inner wall of the guide hole and are symmetrically arranged to limit the position of the brush.

[0006] Furthermore, the two first limiting grooves are arc-shaped.

[0007] Furthermore, the guide member has mounting platforms at both ends, each mounting platform having a first mounting hole that penetrates the mounting platform, and the support has a second mounting hole that mates with the first mounting hole. A pin is inserted into the first mounting hole and the second mounting hole to connect the guide member and the support.

[0008] Furthermore, the guide member is also provided with two heat dissipation slots, which are located on both sides of the guide hole.

[0009] Furthermore, the support is provided with a limiting member, which is detachably installed on the support and covers the guide hole of the guide member; the elastic member is located between the limiting member and the guide member, with one end of the elastic member abutting against the limiting member and the other end of the elastic member abutting against the brush.

[0010] Furthermore, the limiting member has a first side plate and a second side plate protruding in the direction of the guide member, with a gap between the first side plate and the second side plate, and the elastic member is located between the first side plate and the second side plate.

[0011] Furthermore, a second limiting groove is recessed on the side of the first side plate facing the second side plate, and a third limiting groove is recessed on the side of the second side plate facing the first side plate. The second limiting groove and the third limiting groove cooperate to limit the position of the elastic element.

[0012] Furthermore, the limiting member has buckles protruding on both sides, and the limiting member is snapped onto the support via the buckles.

[0013] Furthermore, the number of carbon brush assemblies is two, and the two carbon brush assemblies are symmetrically arranged on both sides of the commutator in a radial direction, and the brushes of the two carbon brush assemblies are in contact with the commutator.

[0014] The beneficial effects of this utility model are:

[0015] (1) Stable contact: The first limiting groove can effectively limit the position of the brush, ensure good contact between the carbon brush and the commutator, and extend the motor life;

[0016] (2) Easy to maintain: The limiting parts are installed on the base by snap-fit, which is easy to disassemble and expose the internal guide parts and carbon brushes. The carbon brushes are set in the through guide holes on the guide parts, which is easy to replace.

[0017] (3) Improve heat dissipation performance: The guide is mounted on the base via mounting platforms protruding on both sides. Heat dissipation grooves are provided on both sides of the guide, which helps to dissipate the heat generated by the carbon brush in contact with the commutator in a timely manner. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an improved carbon brush holder motor according to the present invention;

[0019] Figure 2This is a partial structural schematic diagram of the present invention;

[0020] Figure 3 This is a partial structural schematic diagram of the present invention;

[0021] Figure 4 This is a partial disassembly diagram of the present invention;

[0022] Figure 5 This is a schematic diagram of the carbon brush assembly structure of this utility model.

[0023] The reference numerals in the attached drawings include: 1. Support; 11. Second mounting hole; 2. Stator component; 3. Rotating shaft; 4. Carbon brush assembly; 41. Brush; 42. Guide component; 421. Guide hole; 422. First limiting groove; 423. Mounting platform; 424. First mounting hole; 425. Heat dissipation channel; 5. Limiting component; 51. First side plate; 511. Second limiting groove; 52. Second side plate; 521. Third limiting groove; 53. Buckle; 6. Commutator. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] Please see Figures 1 to 5 As shown, this utility model discloses an improved motor structure with a carbon brush holder, comprising a support 1, a stator 2, a rotor, and a carbon brush assembly 4. The rotor includes a shaft 3 and a commutator 6. The shaft 3 passes through the support 1 and is rotatably mounted on the support 1, and the commutator 6 is mounted on the shaft 3. The stator 2 is mounted on the support 1 and is sleeved around the outside of the rotor. The carbon brush assembly 4 includes a brush 41, a guide 42, and an elastic element. The guide 42 is mounted on the support 1 and has a guide hole 421 passing through it. The brush 41 is movably disposed in the guide hole 421. The elastic element is used to push the brush 41 so that the brush 41 abuts against the commutator 6 radially.

[0026] In actual use, the support 1 includes two support rods, a first end cap, and a second end cap. The two end caps are arranged in parallel, and the support rods are used to connect the two end caps. The two ends of the rotating shaft 3 are rotatably mounted on the two end caps, and the rotating shaft 3 is coplanar with the two support rods. The stator has a cylindrical outer shell, which is installed between the two end caps and surrounds the outside of the rotating shaft 3. The commutator 6 is installed at one end of the rotating shaft 3, and the first end cap covers the commutator 6. The guide member 42 is installed on the first end cap.

[0027] Specifically, the guide member 42 is provided with two first limiting grooves 422, which are recessed from the inner wall of the guide hole 421. The two first limiting grooves 422 are symmetrically arranged to limit the position of the brush 41.

[0028] In actual use, the guide hole 421 is square, with one end leading to the commutator 6 and the other end leading to the first end cover. The first limiting groove 422 is recessed inward from the body of the guide hole 421.

[0029] Specifically, the two first limiting grooves 422 are arc-shaped.

[0030] In actual use, the cross-section of the first limiting groove 422 is arc-shaped. The two first limiting grooves 422 are located on both sides of the brush 41 to limit the position of the brush 41 and prevent the brush 41 from displacing when it comes into contact with the commutator 6.

[0031] Specifically, the guide member 42 is provided with mounting platforms 423 at both ends. The mounting platform 423 has a first mounting hole 424 that penetrates the mounting platform 423. The support 1 is provided with a second mounting hole 11 that cooperates with the first mounting hole 424. A pin is inserted into the first mounting hole 424 and the second mounting hole 11 to connect the guide member 42 and the support 1.

[0032] In actual use, the guide member 42 has mounting platforms 423 at both ends of its main body, and the guide hole 421 is located between the two mounting platforms 423. The first mounting hole 424 on the mounting platform 423 is oriented in the same direction as the length of the rotating shaft 3 or the support rod. The first end cover has six spokes, of which the two spokes closest to the two mounting platforms 423 each have a second mounting hole 11 that mates with the first mounting hole 424.

[0033] Specifically, the guide member 42 is also provided with two heat dissipation grooves 425, which are located on both sides of the guide hole 421.

[0034] In actual use, the heat dissipation channel 425 is set on the mounting platform 423. On the one hand, this prevents the mounting platform 423 on both sides of the guide hole 421 from being too thick and affecting the heat dissipation of the carbon brush; on the other hand, it can reduce the motor load. The central axis of the heat dissipation channel 425 is aligned with the central axis of the guide channel.

[0035] Specifically, the support 1 is provided with a limiting member 5, which is detachably installed on the support 1 and covers the guide hole 421 of the guide member 42; the elastic member is located between the limiting member 5 and the guide member 42, with one end of the elastic member abutting against the limiting member 5 and the other end of the elastic member abutting against the brush 41.

[0036] In actual use, the first end cap has a mounting groove on the side near the guide member 42, and the limiting member 5 is disposed in the mounting groove. Removing the limiting member 5 from the first end cap exposes the guide hole 421 of the guide member 42, which is covered by the first end cap, allowing for quick replacement of the carbon brush. One end of the elastic member abuts against the limiting member 5, and the other end abuts against the brush 41. The brush 41 has a brush braid, and the first end cap has a through hole on the side near the limiting member 5 through which the brush protrudes.

[0037] Specifically, the limiting member 5 has a first side plate 51 and a second side plate 52 protruding in the direction of the guide member 42, with a gap between the first side plate 51 and the second side plate 52, and the elastic member is located between the first side plate 51 and the second side plate 52.

[0038] In actual use, the first side plate 51 and the second side plate 52 are connected by a reinforcing ridge to prevent deformation of the first side plate 51 and the second side plate 52.

[0039] Specifically, the first side plate 51 is recessed with a second limiting groove 511 on the side facing the second side plate 52, and the second side plate 52 is recessed with a third limiting groove 521 on the side facing the first side plate 51. The second limiting groove 511 and the third limiting groove 521 cooperate to limit the position of the elastic member.

[0040] In actual use, the middle of the first side plate 51 is recessed in the direction away from the second side plate 52 to form a second limiting groove 511, and the middle of the second side plate 52 is recessed in the direction away from the first side plate 51 to form a third limiting groove 521. A support block protrudes from the side of the second limiting groove 511 away from the third limiting groove 521, and a support block also protrudes from the side of the third limiting groove 521 away from the second limiting groove 511. The support blocks are used to bear additional axial forces, enhance the structural stability of the limiting grooves, and disperse stress.

[0041] Specifically, the limiting member 5 has buckles 53 protruding on both sides, and the limiting member 5 is engaged with the support 1 via the buckles 53.

[0042] In actual use, there are four buckles 53, which are distributed in pairs on both sides of the limiting member 5. The buckles 53 are engaged with the edge of the mounting groove of the first end cover.

[0043] Specifically, there are two carbon brush assemblies 4, which are symmetrically arranged on both sides of the commutator 6 in a radial direction, and the brushes 41 of the two carbon brush assemblies 4 are in contact with the commutator 6.

[0044] In actual use, there are two guide members 42 and two limiting members 5. The part of the plate near the guide member 42 is provided with a second mounting hole 11, and the second end cover is provided with two mounting grooves.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An improved motor structure with a carbon brush holder, characterized in that: The assembly includes a support (1), a stator (2), a rotor, and a carbon brush assembly (4). The rotor includes a shaft (3) and a commutator (6). The shaft (3) passes through the support (1) and is rotatably mounted on the support (1). The commutator (6) is mounted on the shaft (3). The stator (2) is mounted on the support (1) and is sleeved around the outside of the rotor. The carbon brush assembly (4) includes a brush (41), a guide (42), and an elastic element. The guide (42) is mounted on the support (1) and has a guide hole (421) that passes through the guide (42). The commutator (6) and the elastic element are located at opposite ends of the guide hole (421). The brush (41) is movably disposed in the guide hole (421). The elastic element is used to push the brush (41) so that the brush (41) abuts against the commutator (6) radially.

2. The improved motor structure with a carbon brush holder according to claim 1, characterized in that: The guide member (42) is provided with two first limiting grooves (422), which are recessed from the inner wall of the guide hole (421). The two first limiting grooves (422) are symmetrically arranged to limit the position of the brush (41).

3. The improved motor structure with a carbon brush holder according to claim 2, characterized in that: The two first limiting grooves (422) are arc-shaped.

4. The improved motor structure with a carbon brush holder according to claim 1, characterized in that: The guide member (42) has mounting platforms (423) at both ends. The mounting platforms (423) have a first mounting hole (424) that passes through the mounting platform (423). The support (1) has a second mounting hole (11) that mates with the first mounting hole (424). A pin is inserted into the first mounting hole (424) and the second mounting hole (11) to connect the guide member (42) and the support (1).

5. The improved motor structure with a carbon brush holder according to claim 1, characterized in that: The guide member (42) is also provided with two heat dissipation channels (425), which are located on both sides of the guide hole (421).

6. The improved motor structure with a carbon brush holder according to claim 1, characterized in that: The support (1) is provided with a limiting member (5), which is detachably installed on the support (1). The limiting member (5) covers the guide hole (421) of the guide member (42). The elastic member is located between the limiting member (5) and the guide member (42). One end of the elastic member abuts against the limiting member (5), and the other end of the elastic member abuts against the brush (41).

7. The improved motor structure with a carbon brush holder according to claim 6, characterized in that: The limiting member (5) has a first side plate (51) and a second side plate (52) protruding in the direction of the guide member (42), with a gap between the first side plate (51) and the second side plate (52), and the elastic member is located between the first side plate (51) and the second side plate (52).

8. The improved motor structure with a carbon brush holder according to claim 7, characterized in that: The first side plate (51) is recessed with a second limiting groove (511) on the side facing the second side plate (52), and the second side plate (52) is recessed with a third limiting groove (521) on the side facing the first side plate (51). The second limiting groove (511) and the third limiting groove (521) cooperate to limit the position of the elastic element.

9. The improved motor structure with a carbon brush holder according to claim 6, characterized in that: The limiting member (5) has buckles (53) protruding on both sides, and the limiting member (5) is snapped onto the support (1) via the buckles (53).

10. The improved motor structure with a carbon brush holder according to claim 1, characterized in that: The number of carbon brush assemblies (4) is two. The two carbon brush assemblies (4) are symmetrically arranged on both sides of the commutator (6) in a radial direction, and the brushes (41) of the two carbon brush assemblies (4) are in contact with the commutator (6).

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