Novel long-service-life brush holder

Abstract

The utility model discloses a novel long-life brush holder, relates to the technical field of electric brushes, and comprises a base plate and a carbon brush, the base plate is in a circular ring shape, the upper end of the base plate is fixedly provided with two fixing members, the carbon brush is located in the fixing members, two corresponding ends of the fixing members are provided with openings, the openings face the center of the base plate, and the carbon brush is fixed on the base plate. A push plate used for pushing the carbon brush is arranged at the opening, close to the outer end, of the fixing piece and controlled by a pushing mechanism to move towards the circle center of the bottom plate. According to the utility model, the moving distance of the moving rack is two times of the moving distance of the gear, so that the moving distance is two times of the springback distance of the pushing spring, and therefore, the pushing spring can push the carbon brush for a relatively far distance only by springback for a very small distance, and therefore, the pushing spring can be ensured to have relatively stable elastic force; the carbon brush can still be in stable contact with the commutator after being worn much, the utilization rate of the carbon brush can be improved, and meanwhile the replacement frequency of the carbon brush is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a brush technical field, concretely relates to a novel long -life brush holder. BACKGROUND

[0002] The brush holder is an important component in the motor, mainly used for supporting and fixing the brush, ensuring the stable contact between the brush and the commutator, keeping the contact voltage constant, so as to realize the transmission and commutation of current and avoid commutation failure.

[0003] The traditional brush holder is that the carbon brush is installed in the fixed part, then the spring after compression is extruded to one end of the carbon brush, so that the other end of the carbon brush can be in stable contact with the commutator, and the commutator rotates continuously to wear the carbon brush, so that the length of the carbon brush is shortened continuously, and the spring is rebounded to extrude the carbon brush to continue to contact the commutator, but the spring force becomes weaker and weaker with the rebound of the spring, which causes the extrusion force of the spring to the carbon brush to be insufficient, so that the carbon brush cannot be in stable contact with the commutator, which causes the motor failure, so the carbon brush needs to be replaced frequently, resulting in short service life of the carbon brush, and the high replacement frequency of the carbon brush affects the work efficiency and causes the waste of the carbon brush, therefore, the utility model provides a novel long -life brush holder. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a novel long -life brush holder to solve the problems in the above background.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a novel long -life brush holder, including bottom plate and carbon brush, the bottom plate is circular ring shape, two fixed parts are fixedly installed on the bottom plate upper end, the carbon brush is located in the fixed part, the both ends of the fixed part are equipped with the opening, and the opening faces the bottom plate center, the opening of the fixed part near the outer end is equipped with the push plate for pushing the carbon brush, the push plate moves to the center direction of the bottom plate through the push mechanism control;

[0006] The push mechanism includes the fixed rack fixedly arranged on one side of the fixed part, and the fixed rack direction is upward, the upper end of the fixed rack is connected with the gear through meshing, the upper end of the gear is connected with the movable rack through meshing, and one end of the push plate is movably connected with the outer end surface of the movable rack;

[0007] The gear rack is rotatably installed on both sides of the gear, one side of the gear rack is equipped with the guide column, one side of the outer end of the fixed part is equipped with the fixed plate, the guide column penetrates through the fixed plate and is connected with the fixed plate through sliding;

[0008] The push spring is sleeved on the guide column, and the push spring is located between the fixed plate and the gear rack.

[0009] Preferably, the fixing member is provided with a first outer edge plate on both sides of the bottom, the fixing member is fixedly installed on the upper end of the bottom plate through the first outer edge plate, and the fixed rack is fixedly installed on the upper end of the first outer edge plate on one side of the fixing member.

[0010] Preferably, the fixing member is provided with a second outer edge plate on one side, the second outer edge plate is located on the same side of the first outer edge plate and above the first outer edge plate, and the second outer edge plate is provided with a sliding groove at the lower end.

[0011] The upper end of the movable rack is provided with a ball block, the upper end of the ball block is provided with a ball, and the ball is in rolling connection with the top of the sliding groove.

[0012] Preferably, the outer end surface of the guide column is provided with a limiting block, and the limiting block is located on the outer side of the fixed plate, and the outer end surface of the limiting block is provided with a pull ring for pulling the guide column.

[0013] Preferably, the outer end surface of the movable rack is provided with a rotating shaft, and one end of the push plate is in rotary connection with the rotating shaft.

[0014] Preferably, the fixing member is provided with a through groove on one side for avoiding the push plate, and the push plate penetrates into the inside of the through groove.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The rebound force of the pushing spring can extrude the gear frame to move towards the center of the bottom plate, so that the gear rolls on the upper end of the fixed rack while moving, the movable rack moves in the sliding groove, and the movable rack moves towards the center of the bottom plate, so that the push plate pushes the carbon brush to move towards the commutator, and the carbon brush can continue to stably contact the commutator after being worn out.

[0017] The moving distance of the movable rack is twice the moving distance of the gear, and thus is twice the rebound distance of the pushing spring, so the pushing spring only needs to rebound a small distance to push the carbon brush a relatively far distance, and thus the pushing spring has a relatively stable elastic force, the carbon brush can still stably contact the commutator after being worn out, the use rate of the carbon brush is improved, and the replacement frequency of the carbon brush is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is a fixing member and a pushing mechanism structure schematic view of the utility model;

[0020] Figure 3 It is a fixing member and a pushing mechanism side view of the utility model;

[0021] Figure 4The fixed part and the pushing mechanism front view of the utility model.

[0022] In the figure: 1, base plate; 2, carbon brush; 3, fixed part; 31, fixed plate; 32, first outer edge plate; 33, second outer edge plate; 34, sliding groove; 35, ball block; 36, ball; 37, through slot; 4, push plate; 5, fixed rack; 6, gear; 7, moving rack; 71, rotating shaft; 8, gear carrier; 81, guide column; 82, limit block; 83, pull ring; 9, pushing spring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a kind of novel long-life brush holder, including base plate 1 and carbon brush 2, base plate 1 is circular ring shape, two fixed parts 3 are fixedly installed on base plate 1 upper end, the first outer edge plate 32 is equipped in the bottom of both sides of fixed part 3, fixed part 3 is fixedly installed on the upper end of base plate 1 by the first outer edge plate 32, carbon brush 2 is located in fixed part 3 inside, fixed part 3 corresponding two ends are equipped with opening, and opening is towards the center of base plate 1, the opening of fixed part 3 close outer end is equipped with the push plate 4 for pushing carbon brush 2, push plate 4 moves towards the center of base plate 1 direction by pushing mechanism control.

[0025] Among them, the middle part of base plate 1 is used for docking commutator, fixed part 3 is used for limiting carbon brush 2, carbon brush 2 is installed in fixed part 3 inside, and can slide in fixed part 3 inside, after the end of carbon brush 2 contacting commutator wears, pushing mechanism moves the other end of carbon brush 2 to commutator direction by push plate 4, so that carbon brush 2 can stably contact commutator.

[0026] The pushing mechanism comprises a fixed rack 5 fixedly arranged on one side of the fixing member 3, the fixed rack 5 is fixedly installed on the upper end of the first outer edge plate 32 on one side of the fixing member 3, and the fixed rack 5 is upward, the upper end of the fixed rack 5 is engagedly connected with a gear 6, the upper end of the gear 6 is engagedly connected with a movable rack 7, and one end of the push plate 4 is movably connected with the outer end surface of the movable rack 7; gear racks 8 are rotatably installed on the two sides of the gear 6, a guide column 81 is arranged on one side of the gear rack 8, a fixed plate 31 is arranged on one side of the outer end of the fixing member 3, the guide column 81 penetrates through the fixed plate 31 and is slidably connected with the fixed plate 31; a pushing spring 9 is sleeved on the guide column 81, and the pushing spring 9 is located between the fixed plate 31 and the gear rack 8; a second outer edge plate 33 is arranged on one side of the fixing member 3, the second outer edge plate 33 is located on the same side of the first outer edge plate 32 and above the first outer edge plate 32, a sliding groove 34 is arranged on the lower end of the second outer edge plate 33, a ball block 35 is arranged on the upper end of the movable rack 7, a ball 36 is arranged on the upper end of the ball block 35, the ball 36 is rollingly connected with the top of the sliding groove 34, a through groove 37 for avoiding the push plate 4 is arranged on one side of the fixing member 3, and the push plate 4 penetrates through the inside of the through groove 37.

[0027] The pushing spring 9 is a power output member, after the carbon brush 2 is installed inside the fixing member 3, the pushing spring 9 is in a compressed state, when the end of the carbon brush 2 in contact with the commutator is worn, the rebounding force of the pushing spring 9 will extrude the gear rack 8 to move towards the center of the bottom plate 1, so that the gear 6 rolls on the upper end of the fixed rack 5 while moving, so that the movable rack 7 moves in the sliding groove 34 and moves towards the center of the bottom plate 1, when the movable rack 7 moves, the ball 36 on the upper end of the movable rack 7 rolls in the sliding groove 34, so that the stability of the movement can be maintained, so that the push plate 4 pushes the carbon brush 2 to move towards the commutator, so that the carbon brush 2 can continue to stably contact with the commutator, in addition, it needs to be noted that the moving distance of the movable rack 7 is twice the moving distance of the gear 6, so it is also twice the rebounding distance of the pushing spring 9, therefore, the pushing spring 9 only needs to rebound a small distance to push the carbon brush 2 to a relatively far distance, therefore, it can ensure that the pushing spring 9 has a relatively stable elastic force, and the carbon brush 2 can still stably contact with the commutator after being worn more, so that the use rate of the carbon brush 2 can be improved, and the replacement frequency of the carbon brush 2 can be reduced.

[0028] A limiting block 82 is arranged on the outer end surface of the guide column 81 and located outside the fixed plate 31, a pull ring 83 for pulling the guide column 81 is arranged on the outer end surface of the limiting block 82, a rotating shaft 71 is arranged on the outer end surface of the movable rack 7, and one end of the push plate 4 is rotatably connected with the rotating shaft 71.

[0029] Wherein, when installing the carbon brush 2, pull the pull ring 83 to the outside, so that the moving rack 7 moves to the outside, so that the push plate 4 moves to the outside, and finally moves to the outside of the through groove 37, then rotate the push plate 4 through the rotating shaft 71, so that the push plate 4 does not block the opening of the fixing part 3, insert the carbon brush 2 into the fixing part 3 from the opening of the fixing part 3, then rotate the push plate 4 again, so that the push plate 4 returns to the original position, loosen the pull ring 83 so that the push plate 4 enters the through groove 37, the through groove 37 will limit the push plate 4 from rotating randomly, at this time the push plate 4 pushes the carbon brush 2 to contact the commutator through the elastic force of the push spring 9.

[0030] The working principle and use process of the utility model:

[0031] Wherein, when installing the carbon brush 2, pull the pull ring 83 to the outside, so that the moving rack 7 moves to the outside, so that the push plate 4 moves to the outside, and finally moves to the outside of the through groove 37, then rotate the push plate 4 through the rotating shaft 71, so that the push plate 4 does not block the opening of the fixing part 3, insert the carbon brush 2 into the fixing part 3 from the opening of the fixing part 3, then rotate the push plate 4 again, so that the push plate 4 returns to the original position, loosen the pull ring 83 so that the push plate 4 enters the through groove 37, the through groove 37 will limit the push plate 4 from rotating randomly, at this time the push plate 4 pushes the carbon brush 2 to contact the commutator through the elastic force of the push spring 9, when the end of the carbon brush 2 that contacts the commutator wears, the rebound force of the push spring 9 will extrude the gear frame 8 to move to the center direction of the bottom plate 1, so that the gear 6 rolls on the fixed rack 5 while moving, so that the moving rack 7 moves in the sliding groove 34, and the moving rack 7 moves to the center direction of the bottom plate 1, when the moving rack 7 moves, the ball 36 at the upper end thereof rolls in the sliding groove 34, so that it can keep the stability of movement, so that the push plate 4 pushes the carbon brush 2 to move to the direction of the commutator, so that the carbon brush 2 can continue to stably contact the commutator, in addition, it needs to be noted that the moving distance of the moving rack 7 is twice the moving distance of the gear 6, so it is also twice the rebound distance of the push spring 9, therefore, the push spring 9 only needs to rebound a small distance to push the carbon brush 2 a relatively far distance, therefore, it can ensure that the push spring 9 has a relatively stable elastic force, and the carbon brush 2 can still stably contact the commutator after the carbon brush 2 wears a lot, which can improve the utilization rate of the carbon brush 2, and also reduces the replacement frequency of the carbon brush 2.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A novel high-life brush holder, comprising a base plate (1) and carbon brushes (2), wherein the base plate (1) is annular in shape, characterized in that: Two fasteners (3) are fixedly installed on the upper end of the base plate (1). The carbon brush (2) is located inside the fastener (3). The two ends of the fastener (3) are provided with openings, and the openings face the center of the base plate (1). The opening near the outer end of the fastener (3) is provided with a push plate (4) for pushing the carbon brush (2). The push plate (4) is controlled by a pushing mechanism to move towards the center of the base plate (1). The pushing mechanism includes a fixed rack (5) fixedly disposed on one side of the fixing member (3), and the fixed rack (5) is upward. A gear (6) is meshed with the upper end of the fixed rack (5), and a movable rack (7) is meshed with the upper end of the gear (6). One end of the push plate (4) is movably connected to the outer end face of the movable rack (7). The gear (6) is rotatably mounted on both sides of the gear (8), and a guide post (81) is provided on one side of the gear (8). A fixing plate (31) is provided on one side of the outer end of the fixing member (3). The guide post (81) passes through the fixing plate (31) and is slidably connected to the fixing plate (31). A push spring (9) is fitted on the guide post (81), and the push spring (9) is located between the fixed plate (31) and the gear frame (8).

2. The novel high-lifespan brush holder according to claim 1, characterized in that: The fixing member (3) has a first outer edge plate (32) on both sides of its bottom. The fixing member (3) is fixedly installed on the upper end of the base plate (1) through the first outer edge plate (32). The fixing rack (5) is fixedly installed on the upper end of the first outer edge plate (32) on one side of the fixing member (3).

3. The novel high-lifespan brush holder according to claim 2, characterized in that: The fastener (3) has a second outer edge plate (33) on one side. The second outer edge plate (33) is located on the same side as the first outer edge plate (32) and above the first outer edge plate (32). The lower end of the second outer edge plate (33) has a sliding groove (34). The upper end of the movable rack (7) is provided with a ball block (35), and the upper end of the ball block (35) is provided with a ball (36), which is in rolling connection with the top of the groove (34).

4. The novel high-lifespan brush holder according to claim 1, characterized in that: The guide post (81) has a limiting block (82) on its outer end face, and the limiting block (82) is located outside the fixing plate (31). The limiting block (82) has a pull ring (83) on its outer end face for pulling the guide post (81).

5. A novel high-lifespan brush holder according to claim 1, characterized in that: The outer end face of the movable rack (7) is provided with a rotating shaft (71), and one end of the push plate (4) is rotatably connected to the rotating shaft (71).

6. A novel high-lifespan brush holder according to claim 1, characterized in that: The fastener (3) has a through groove (37) on one side for avoiding the push plate (4), and the push plate (4) passes through the through groove (37).

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