An improved brush structure and a motor with the brush structure

Abstract

The utility model relates to the technical field of motor brushes, and in particular discloses an improved brush structure and a motor with the brush structure. The improved brush structure comprises a brush unit, wherein the brush unit comprises a bracket and a brush member used in conjunction with the bracket; and further comprises a coil spring member, wherein the brush member is movably arranged relative to the bracket, the coil spring member comprises a winding coil portion and a fixing portion connected to the winding coil portion, wherein the fixing portion is detachably connected to the bracket, and the winding coil portion is used to abut against the brush member so that the brush member abuts against an external commutator. The utility model greatly simplifies the structural complexity of the entire coil spring member and reduces the volume of the coil spring member by means of the structural cooperation between the winding coil portion and the fixing portion of the coil spring member, thereby reducing the size and volume of the entire brush structure. The fixed installation cooperation between the fixing portion and the bracket is utilized to avoid the coil spring member from being moved relative to the bracket and causing poor use, thereby ensuring the stability of the use performance of the brush structure.

Description

Technical Field

[0001] The utility model relates to the technical field of motor brushes, and in particular discloses an improved brush structure and a motor with the brush structure. Background Art

[0002] In the operation of various mechanical equipment, motors are one of the most commonly used power sources. The application fields of motors are extremely wide. For example, motors are also needed to drive the endless belt in treadmills. Of course, motors are also needed in vibrating beds as the driving parts for outputting power.

[0003] In the actual use of the motor, it is often necessary to configure a brush assembly and a commutation assembly. In order to ensure the normal contact between the brush assembly and the commutation assembly, a pressing structure is required to apply a pressing force to the brush. The pressing structure in the prior art is complex and occupies a large size and space, resulting in the brush assembly being too large and inconvenient to install. In addition, the pressing structure in the prior art is also prone to positional movement because it is not fixed, resulting in poor contact between the brush assembly and the commutation assembly. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide an improved brush structure and a motor with a brush structure, which greatly simplifies the structural complexity of the entire coil spring member and reduces the volume of the coil spring member by means of the structural cooperation between the winding coil portion and the fixing portion of the coil spring member, thereby reducing the size and volume of the entire brush structure; the fixed installation cooperation between the fixing portion and the bracket is utilized to avoid the coil spring member from moving relative to the bracket and causing malfunction in use, thereby ensuring the stability of the performance of the brush structure.

[0005] To achieve the above-mentioned purpose, the utility model provides an improved brush structure, including a brush unit, the brush unit having a bracket and a brush member used in conjunction with the bracket; including a coil spring member, the brush member is movably arranged relative to the bracket, the coil spring member has a winding coil portion and a fixing portion connected to the winding coil portion, the fixing portion is detachably connected to the bracket, and the winding coil portion is used to abut against the brush member so that the brush member abuts against an external commutator.

[0006] The winding coil portion comprises a ring portion and a contact portion connected to the ring portion, the contact portion is located between the ring portion and the fixing portion, and the ring portion and / or the contact portion abut against the brush member.

[0007] The contact portion is in a curved arc shape, the inner concave arc surface of the contact portion abuts against the brush component, and the brush component has an arc-shaped outer convex portion that matches the inner concave arc surface of the contact portion.

[0008] The improved brush structure further includes a fastener, which fixes the fixing part on the bracket; the winding coil part is formed by winding a strip of metal sheet, the fixing part is in a flat plate shape, and the fixing part is attached to the bracket.

[0009] The bracket includes a frame body and a limiting member detachably connected to the frame body, the frame body has a receiving groove, the brush member is movably arranged in the receiving groove relative to the frame body, and the limiting member is used to cover the opening of the receiving groove; the fixing part is detachably connected to the limiting member.

[0010] The limiting member comprises a first protrusion and a second protrusion, the fixing portion is fixed on the first protrusion, and the second protrusion is used to abut against the winding coil portion.

[0011] Among them, the improved brush structure also includes a guide member detachably connected to the bracket, a clearance is provided between the guide member and the commutator, the guide member has a guide hole penetrating the guide member, the coil spring member is located in the guide hole, the brush member is movably arranged in the guide hole, and the coil spring member contacts the brush member under the action of elastic restoring force so that the brush member protrudes out of the outer surface of the guide member and contacts the commutator.

[0012] To achieve the above-mentioned purpose, the utility model provides a motor with a brush structure, including a stator component and a rotor component used in conjunction with the stator component, the stator component is arranged around the outer side of the rotor component, and the rotor component has a rotating shaft component that penetrates the stator component; the bracket is fixedly connected to the stator component, the rotating shaft component penetrates the bracket and is rotatably arranged relative to the bracket, and the commutator is fixed on the rotating shaft component.

[0013] Among them, the stator component has a cylindrical component, an end cover and a connecting rod. The end cover is arranged in parallel with the bracket. The cylindrical component is located between the end cover and the bracket. The connecting rod is used to connect the end cover and the bracket. The end cover has a first heat dissipation hole that penetrates the end cover along the length direction of the rotating shaft component. The bracket has a second heat dissipation hole that penetrates the bracket along the length direction of the rotating shaft component. The rotating shaft component is equipped with a cooling fan, and the bracket is located between the cylindrical component and the cooling fan.

[0014] The motor further comprises a pulley mounted on the rotating shaft, the bracket and the pulley are respectively located on both sides of the stator, there are two brush units, the brush members of the two brush units both abut against the commutator, and the two brush units are arranged around the central axis of the bracket. Beneficial effects of the utility model: the utility model greatly simplifies the structural complexity of the entire coil spring member and reduces the volume of the coil spring member by means of the structural cooperation between the winding coil portion and the fixing portion of the coil spring member, thereby reducing the size and volume of the entire brush structure; the fixed installation cooperation between the fixing portion and the bracket is utilized to avoid the coil spring member from moving relative to the bracket and causing poor use, thereby ensuring the stability of the performance of the brush structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the exploded structure of the first embodiment of the present utility model;

[0017] Figure 3 It is a three-dimensional structure schematic diagram of the frame, the limiting member, the coil spring member and the brush member of the first embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the coil spring component and the brush component of the second embodiment of the utility model.

[0019] Reference numerals include:

[0020] 1. Bracket; 2. Brush member; 3. Coil spring member; 4. Winding coil portion; 5. Fixing portion; 6. Commutator; 7. Frame; 8. Limiting member; 9. First boss; 10. Second boss; 11. Guide member; 12. Guide hole; 13. Rotating shaft member; 14. Cylinder member; 15. End cover; 16. Connecting rod; 17. First heat dissipation hole; 18. Second heat dissipation hole; 19. Cooling fan; 20. Pulley; 21. Ring portion; 22. Contact portion. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0022] Embodiment 1

[0023] See also Figures 1 to 3 As shown, an improved brush structure of the utility model includes a brush unit, the brush unit has a bracket 1 and a brush member 2 used in conjunction with the bracket 1. In this embodiment, the bracket 1 is made of insulating plastic. Of course, according to actual needs, the bracket 1 can also be made of metal material. The bracket 1 is roughly in the shape of a hollow disc, and the brush member 2 is located in the hollow cavity of the bracket 1.

[0024] The brush unit also includes a coil spring 3, which is made of a strip steel sheet. The brush member 2 is movably arranged relative to the bracket 1, that is, the brush member 2 is not fixedly installed on the bracket 1, and the brush member 2 can move relative to the bracket 1. The coil spring 3 has a winding coil 4 and a fixing portion 5 connected to the winding coil 4. The winding coil 4 is roughly annular, and the fixing portion 5 is detachably connected and fixedly installed on the bracket 1. The winding coil 4 is used to contact the brush member 2 so that the brush member 2 contacts the external commutator 6. In actual use, the winding coil 4 contacts the brush member 2 and undergoes elastic deformation, and the brush member 2 is contacted and pushed by the elastic restoring force of the winding coil 4, so that the brush member 2 stably contacts the commutator 6.

[0025] The utility model greatly simplifies the structural complexity of the entire coil spring member 3 and reduces the volume of the coil spring member 3 by means of the structural cooperation between the winding coil portion 4 and the fixing portion 5 of the coil spring member 3, thereby reducing the size and volume of the entire brush structure. By means of the fixed installation cooperation between the fixing portion 5 and the bracket 1, during the actual use of the brush unit, the coil spring member 3 is prevented from moving relative to the bracket 1, which may cause poor contact of the brush member 2, thereby ensuring the stability of the performance of the brush structure.

[0026] The improved brush structure also includes a fastener, which is used to fix the fixing portion 5 on the bracket 1. In this embodiment, the fastener is a screw. Of course, according to actual needs, the fastener can also be a bolt, a rivet, etc. The winding coil portion 4 is formed by winding a strip of metal sheet. The winding coil portion 4 is roughly in the shape of a circular disk. During actual manufacturing, the steel sheet is first cut into strips of steel bars, and then one end of the strip of steel bars is wound up with the help of a winding mechanism to form the winding coil portion 4.

[0027] The fixing portion 5 is in the shape of a flat plate. Preferably, the fixing portion 5 is a rectangular flat plate. During actual manufacturing, after one end of the strip-shaped steel bar is wound by the winding mechanism to form the winding coil portion 4, the other end of the strip-shaped steel bar forms the fixing portion 5. The fixing portion 5 is arranged flatly on the bracket 1. During the installation process of the coil spring member 3 and the bracket 1, the contact area between the coil spring member 3 and the bracket 1 is increased to ensure that the coil spring member 3 is firmly positioned on the bracket 1. Preferably, a limiting groove for accommodating the fixing portion 5 is provided on the bracket 1, and the fixing portion 5 is limited by the side wall of the limiting groove. The fixing portion 5 is provided with a through hole passing through the fixing portion 5, and the rod body of the fastener is inserted into the bracket 1 through the through hole, and the head of the fastener presses the fixing portion 5, so that the fixing portion 5 is clamped between the bracket 1 and the head of the fastener.

[0028] The bracket 1 includes a frame body 7 and a limiting member 8 detachably connected to the frame body 7. The frame body 7 is generally a hollow disk. The limiting member 8 can be mounted on the frame body 7 via screws or the like. In this embodiment, the frame body 7 has a receiving groove, and the limiting member 8 is snap-fitted on the frame body 7. The brush member 2 is movably arranged in the receiving groove relative to the frame body 7, and the limiting member 8 is used to cover the opening of the receiving groove, thereby encapsulating the brush unit in the receiving groove to prevent the brush unit from falling out of the receiving groove.

[0029] The fixing portion 5 is detachably connected and installed on the limiting member 8, so that the coil spring member 3 and the limiting member 8 form an independent module. Since the coil spring member 3 is small in size, it is not easy to pick up during the installation process. By installing and fixing the coil spring member 3 on the limiting member 8, the coil spring member 3 can be installed or removed by taking the limiting member 8, which improves the efficiency of assembly and disassembly of the coil spring member 3, avoids the time-consuming and labor-intensive process of assembling the coil spring member 3 and the limiting member 8 one by one, and improves the assembly efficiency.

[0030] The limiting member 8 has a first boss 9 and a second boss 10. The first bosses 9 are spaced apart and arranged in parallel with each other. The cross-sectional shape of the bosses is rectangular. The fixing portion 5 is fixed on the first boss 9. Preferably, the fixing portion 5 is flatly arranged on the end face of the free end of the first boss 9, and the fixing portion 5 is fixedly pressed and installed on the first boss 9 by screws.

[0031] According to actual needs, the free end of the second boss 10 can be pressed against the winding coil 4, or the winding coil 4 is located between the first boss 9 and the second boss 10. When the free end of the second boss 10 is pressed against the winding coil 4, the second boss 10 is used to limit the position of the winding coil 4 to avoid excessive movement of the winding coil 4. When the winding coil 4 is located between the first boss 9 and the second boss 10, on the one hand, the two bosses are used to limit the winding coil 4 so that the winding coil 4 can only move between the two bosses. On the other hand, the winding coil 4 can be partially expanded along the length direction to increase the elastic restoring force, thereby ensuring that the winding coil 4 has sufficient elastic restoring force to be applied to the brush member 2.

[0032] The improved brush structure also includes a guide member 11 detachably connected to the bracket 1. The guide member 11 is located inside the bracket 1 and can be fixedly mounted on the frame 7 of the bracket 1 by means of screws. The guide member 11 is made of insulating plastic. There is a clearance between the guide member 11 and the commutator 6. The setting of the clearance can prevent the guide member 11 from contacting the commutator 6.

[0033] The guide member 11 has a guide hole 12 penetrating the guide member 11, the coil spring member 3 is located in the guide hole 12, and the brush member 2 is movably arranged in the guide hole 12, and the guide hole 12 is used to guide the moving direction of the brush member 2 to prevent the brush member 2 from being skewed during the movement. The coil spring member 3 contacts the brush member 2 under the action of the elastic restoring force, so that the brush member 2 protrudes out of the outer surface of the guide member 11 and contacts the commutator 6 to achieve contact and conduction with the commutator 6.

[0034] The utility model is a motor with a brush structure, comprising a stator component and a rotor component used in conjunction with the stator component, wherein the stator component is sleeved around the outer side of the rotor component, the rotor component is rotatably arranged relative to the stator component, and the rotor component has a rotating shaft component 13 penetrating the stator component. The motor also includes an improved brush structure, wherein the bracket 1 is fixedly connected to the stator component, the rotating shaft component 13 penetrates the bracket 1 and is rotatably arranged relative to the bracket 1, and in this embodiment, a rolling bearing is installed in the frame body 7 of the bracket 1, the rolling bearing is sleeved on the outer side of the rotating shaft component 13, and the commutator 6 is fixedly installed on the rotating shaft component 13.

[0035] The stator component has a cylindrical component 14, an end cover 15 and a connecting rod 16. The end cover 15 and the frame body 7 of the bracket 1 are spaced apart and arranged in parallel. The cylindrical component 14 is located between the end cover 15 and the bracket 1. The cylindrical component 14 is roughly a hollow cylinder. The end cover 15 and the frame body 7 are both equipped with a plug portion inserted into the cylindrical component 14. The end cover 15 and the frame body 7 are close to each other. The sides of the end cover 15 and the frame body 7 are respectively abutted against the two ends of the cylindrical component 14 that are far away from each other. In the actual installation process, the cylindrical component 14 is fixed to the external base by bolts, etc., and the base is then installed on the required frame.

[0036] The connecting rod 16 is used to connect the end cover 15 and the bracket 1. In this embodiment, the connecting rod 16 includes a straight main rod and two nuts respectively screwed to the two ends of the main rod. During actual installation, the main rod is located in the cylindrical member 14 and passes through the cylindrical member 14. The two ends of the main rod respectively protrude out of the outside of the end cover 15 and the outside of the frame 7. One nut presses and fixes the end cover 15 on one end of the cylindrical member 14, and the other nut presses and fixes the frame 7 on the other end of the cylindrical member 14.

[0037] The end cover 15 has a first heat dissipation hole 17 penetrating the end cover 15 along the length direction of the rotating shaft 13. The number of the first heat dissipation holes 17 is multiple, and the multiple first heat dissipation holes 17 are arranged around the central axis of the end cover 15. The bracket 1 has a second heat dissipation hole 18 penetrating the bracket 1 along the length direction of the rotating shaft 13. The second heat dissipation hole 18 is arranged on the frame 7. The number of the second heat dissipation holes 18 is multiple, and the multiple second heat dissipation holes 18 are arranged around the central axis of the frame 7. The rotating shaft 13 is equipped with a heat dissipation fan 19, and the bracket 1 is located between the cylindrical member 14 and the heat dissipation fan 19. During the rotation of the rotor member, the rotor member drives the heat dissipation fan 19 to rotate. When the heat dissipation fan 19 rotates, it drives the air to flow. The flowing air flows through the first heat dissipation hole 17, the gap between the stator member and the rotor member, and the second heat dissipation hole 18, thereby quickly dissipating the heat of the stator member and the rotor member, and preventing the motor from being used improperly due to excessive temperature.

[0038] The motor also includes a pulley 20 mounted on the rotating shaft 13. In the present embodiment, the pulley 20 includes a disk body portion connected to a pulley portion, the outer diameter of the pulley portion is smaller than the outer diameter of the disk body portion, the pulley portion cooperates with an annular belt outside, the disk body portion is arranged parallel to the end cover 15, and a gap groove is provided between the disk body portion and the end cover 15 for facilitating air flow, and the bracket 1 and the pulley 20 are respectively located on the left and right sides of the stator component.

[0039] Preferably, there are two brush units, the brush members 2 of the two brush units both abut against the commutator 6 , and the two brush units are arranged around the central axis of the bracket 1 . In this embodiment, the two brush units are arranged around the central axis of the bracket 1 in a ring array.

[0040] Embodiment 2

[0041] See also Figure 4 As shown, in this embodiment, the winding ring portion 4 has a ring portion 21 and a contact portion 22 connected to the ring portion 21, the ring portion 21 is roughly annular, the contact portion 22 is located between the ring portion 21 and the fixing portion 5, and the ring portion 21 or / and the contact portion 22 abuts against the brush member 2. In actual use, the fixing portion 5 is fixed on the first protrusion 9, and the second protrusion 10 is pressed on the ring portion 21, so that the contact portion 22 located in the middle of the coil spring member 3 abuts and is pressed on one end of the brush member 2, so that the other end of the brush member 2 abuts against the conducting commutator 6.

[0042] Preferably, the contact portion 22 is in a curved arc shape. According to actual needs, the contact portion 22 is roughly U-shaped or C-shaped. The concave arc surface of the contact portion 22 abuts against the brush member 2. The two ends of the contact portion 22 respectively abut against the two ends of the brush member 2 to further limit the brush member 2. The brush member 2 has an arc-shaped outer convex portion that matches the concave arc surface of the contact portion 22.

[0043] The rest of this embodiment is the same as the first embodiment. The features not explained in this embodiment are all based on the explanations in the first embodiment and will not be described in detail here.

[0044] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An improved brush structure, comprising a brush unit, the brush unit having a bracket (1) and a brush member (2) used in conjunction with the bracket (1); characterized in that: The invention also comprises a coiled spring member (3), wherein the brush member (2) is movably arranged relative to the bracket (1), the coiled spring member (3) comprises a winding coil portion (4) and a fixing portion (5) connected to the winding coil portion (4), the fixing portion (5) being detachably connected to the bracket (1), and the winding coil portion (4) being used to abut against the brush member (2) so that the brush member (2) abuts against an external commutator (6).

2. The improved brush structure according to claim 1, characterized in that: The winding coil portion (4) comprises a ring portion (21) and a contact portion (22) connected to the ring portion (21); the contact portion (22) is located between the ring portion (21) and the fixing portion (5); the ring portion (21) and / or the contact portion (22) abut against the brush member (2).

3. The improved brush structure according to claim 1, characterized in that: The contact portion (22) is in the shape of a curved arc, the inner concave arc surface of the contact portion (22) abuts against the brush member (2), and the brush member (2) has an arc-shaped outer convex portion that matches the inner concave arc surface of the contact portion (22).

4. The improved brush structure according to claim 1, characterized in that: The improved brush structure also includes a fastener, which fixes the fixing part (5) on the bracket (1); the winding coil part (4) is formed by winding a strip of metal sheet, the fixing part (5) is in the shape of a flat plate, and the fixing part (5) is attached to the bracket (1).

5. The improved brush structure according to claim 1 is characterized in that: The bracket (1) comprises a frame body (7) and a limiting member (8) detachably connected to the frame body (7); the frame body (7) has a receiving groove; the brush member (2) is movably arranged in the receiving groove relative to the frame body (7); the limiting member (8) is used to cover the opening of the receiving groove; and the fixing part (5) is detachably connected to the limiting member (8).

6. The improved brush structure according to claim 5, characterized in that: The limiting member (8) comprises a first convex column (9) and a second convex column (10), the fixing portion (5) is fixed on the first convex column (9), and the second convex column (10) is used to abut against the winding coil portion (4) or the winding coil portion (4) is located between the first convex column (9) and the second convex column (10).

7. The improved brush structure according to claim 1, characterized in that: The improved brush structure also includes a guide member (11) detachably connected to the bracket (1), a clearance gap being provided between the guide member (11) and the commutator (6), the guide member (11) having a guide hole (12) penetrating the guide member (11), a coil spring member (3) being located in the guide hole (12), a brush member (2) being movably accommodated in the guide hole (12), and the coil spring member (3) abutting against the brush member (2) under the action of elastic restoring force so that the brush member (2) protrudes out of the outer surface of the guide member (11) and abuts against the commutator (6).

8. A motor with a brush structure, comprising a stator and a rotor used in conjunction with the stator, wherein the stator is sheathed around the outer side of the rotor, and the rotor has a rotating shaft (13) penetrating the stator; characterized in that: The motor also includes the improved brush structure as described in any one of claims 1 to 7, the bracket (1) is fixedly connected to the stator component, the rotating shaft component (13) passes through the bracket (1) and is rotatably arranged relative to the bracket (1), and the commutator (6) is fixed on the rotating shaft component (13).

9. The motor with a brush structure according to claim 8, characterized in that: The stator component comprises a cylindrical component (14), an end cover (15) and a connecting rod (16); the end cover (15) and the bracket (1) are arranged in parallel; the cylindrical component (14) is located between the end cover (15) and the bracket (1); the connecting rod (16) is used to connect the end cover (15) and the bracket (1); the end cover (15) has a first heat dissipation hole (17) penetrating the end cover (15) along the length direction of the rotating shaft component (13); the bracket (1) has a second heat dissipation hole (18) penetrating the bracket (1) along the length direction of the rotating shaft component (13); the rotating shaft component (13) is equipped with a heat dissipation fan (19); the bracket (1) is located between the cylindrical component (14) and the heat dissipation fan (19).

10. The motor with a brush structure according to claim 8, characterized in that: The motor also includes a pulley (20) mounted on the rotating shaft (13). The bracket (1) and the pulley (20) are respectively located on both sides of the stator. There are two brush units. The brush members (2) of the two brush units both abut against the commutator (6). The two brush units are arranged around the central axis of the bracket (1).

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