CN213846396U - End cover assembly and direct current motor - Google Patents
End cover assembly and direct current motor Download PDFInfo
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- CN213846396U CN213846396U CN202023117297.XU CN202023117297U CN213846396U CN 213846396 U CN213846396 U CN 213846396U CN 202023117297 U CN202023117297 U CN 202023117297U CN 213846396 U CN213846396 U CN 213846396U
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- end cap
- end cover
- brush
- support
- cover body
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Abstract
The embodiment of the utility model discloses end cover subassembly and direct current motor for solve current brush subassembly's structure and be not suitable for micro motor's technical problem. The embodiment of the utility model provides a including lid body, first brush and second brush; the end cover comprises an end cover body and is characterized in that a first support and a second support are arranged on the inner side surface of the end cover body, the first support and the second support are symmetrical about the center of the end cover body, a first electric brush is fixedly installed on the first support, a second electric brush is fixedly installed on the second support, and the first electric brush and the second electric brush form an included angle of 90 degrees. In this embodiment, first brush and second brush are the right angle assembly on the end cover body, and applicable motor frame diameter is at the micro motor below 20 millimeters, and assembly structure is more convenient.
Description
Technical Field
The utility model relates to a direct current motor designs technical field, especially relates to an end cover subassembly and direct current motor.
Background
Prior art dc motors generally include a stator and a rotor rotatably mounted to the stator. The rotor comprises a rotating shaft, a commutator fixed on the rotating shaft, a rotor core and a rotor winding wound on the rotor core and electrically connected with a commutator bar of the commutator. The stator includes a brush assembly having a brush in electrical contact with the segments in frictional contact.
In recent years, a design for miniaturizing a dc motor has become more popular in response to a demand for high torque. In a direct current motor with a smaller size, the distance between adjacent commutators is smaller, and the brush structure in the prior art occupies more internal space of the direct current motor, so that when the size of the direct current motor is reduced, the existing brush structure cannot be installed, and the brush structure cannot be applied to a small direct current motor with a frame diameter below 20 mm.
Therefore, in order to solve the above technical problems, it is an important subject of research by those skilled in the art to find an end cap assembly applicable to a micro dc motor.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model discloses end cover subassembly and direct current motor for solve current brush subassembly's structure and be not suitable for micro motor's technical problem.
The utility model provides an end cover assembly, include:
an end cap body, a first brush and a second brush;
the end cover comprises an end cover body and is characterized in that a first support and a second support are arranged on the inner side surface of the end cover body, the first support and the second support are symmetrical about the center of the end cover body, a first electric brush is fixedly installed on the first support, a second electric brush is fixedly installed on the second support, and the first electric brush and the second electric brush form an included angle of 90 degrees.
Optionally, the first bracket, the second bracket and the end cover body are of an integrally formed structure, and the first bracket and the second bracket are of groove structures.
Optionally, a first clamping column is arranged on the first support, and a second clamping column is arranged on the second support;
the inner side surface of the end cover body is provided with a first clamping hole matched with the first clamping column, and the first clamping column is clamped in the first clamping hole;
the inner side surface of the end cover body is provided with a second clamping hole matched with the second clamping column, and the second clamping column is clamped in the second clamping hole.
Optionally, the inner side surface of the end cover body is further provided with a clamping portion, and the clamping portion protrudes outwards from the inner side surface of the end cover body.
Optionally, the first brush is connected with a first wiring pole, the first wiring pole is installed on the first support, and the first wiring pole is connected with a first wire.
Optionally, the second brush is connected with a second wiring pole, the second wiring pole is installed on the second support, and the second wiring pole is connected with a second wire.
Optionally, a threading hole is formed in the outer side wall of the end cover body, and the first lead and the second lead pass through the threading hole and penetrate out of the end cover body.
Optionally, the end cap body is fabricated from an insulating material.
The utility model provides a direct current motor, which comprises an outer shell, a stator, a rotor and the end cover component;
the rotor comprises a rotating shaft, a commutator and an iron core which are fixedly connected with the rotating shaft, and a winding which is wound on the iron core and is electrically connected with a commutator bar of the commutator;
the stator comprises a plurality of magnetic components which are circumferentially arranged along the rotating shaft, the magnetic components are fixed on the inner wall of the outer shell, and a preset gap is formed between every two adjacent magnetic components;
the end cover body of the end cover assembly is detachably connected to the outer shell, and the first electric brush and the second electric brush are located on the periphery of the commutator and are symmetrical relative to the axis of the rotating shaft.
Optionally, the inner side surface of the end cover body is further provided with a clamping part, and the clamping part protrudes outwards from the inner side surface of the end cover body;
the tail end face of the outer shell is provided with a clamping groove matched with the clamping part, and the clamping part is clamped in the clamping groove.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
the embodiment of the utility model provides an end cover assembly and direct current motor, wherein the end cover assembly includes end cover body, first brush and second brush; the end cover comprises an end cover body and is characterized in that a first support and a second support are arranged on the inner side surface of the end cover body, the first support and the second support are symmetrical about the center of the end cover body, a first electric brush is fixedly installed on the first support, a second electric brush is fixedly installed on the second support, and the first electric brush and the second electric brush form an included angle of 90 degrees. In this embodiment, the first brush and the second brush are assembled on the end cap body in a right angle, so that the internal space of the dc motor occupied by the whole brush structure can be reduced, and the above design can be applied to a micro motor with a motor frame diameter of less than 20 mm.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural view of an end cap assembly;
FIG. 2 is a schematic structural view of the inside surface of the end cap body;
FIG. 3 is a schematic structural view of the outside surface of the end cap body;
FIG. 4 is a schematic cross-sectional view B-B of the end cap body;
FIG. 5 is a schematic cross-sectional view D-D of the end cap body;
FIG. 6 is another schematic structural view of an end cap assembly;
FIG. 7 is another schematic view of the inside surface of the end cap body;
FIG. 8 is a schematic cross-sectional view A-A of an alternative configuration of the end cap body;
FIG. 9 is a schematic structural diagram of a DC motor;
illustration of the drawings: an end cap body 1; a first brush 2; a second brush 3; a first wiring terminal post 4; a second terminal post 5; a first conductive line 6; a second conductive line 7; a first support 8; a second bracket 9; a threading hole 10; an engaging portion 11; a rotating shaft 12; an outer shell 13; a core 14; a winding 15; a magnetic member 16; a bearing 17; a commutator 18.
Detailed Description
The embodiment of the utility model discloses end cover subassembly and direct current motor for solve current brush subassembly's structure and be not suitable for micro motor's technical problem.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 9, an end cap assembly provided in the present embodiment includes:
the end cover comprises an end cover body 1, a first electric brush 2 and a second electric brush 3, wherein the end cover body 1 is of a disc-shaped structure and is provided with an inner side surface and an outer side surface, the inner side surface is the side surface of the end cover body 1 facing the interior of a direct current motor outer shell 13, and the outer side surface is the side surface of the end cover body 1 far away from the interior of the direct current motor outer shell 13;
the inner side surface of the end cover body 1 is provided with a first support 8 and a second support 9, the first support 8 and the second support 9 are symmetrical about the center of the end cover body 1, the first electric brush 2 is fixedly installed on the first support 8, the second electric brush 3 is fixedly installed on the second support 9, and the first electric brush 2 and the second electric brush 3 form an included angle of 90 degrees.
It should be noted that the first brush 2 and the second brush 3 have the same structure, wherein each of the first brush 2 and the second brush 3 includes a fixed base and a brush arm integrally formed with the fixed base, and the brush arm and the fixed base form an angle with each other, specifically, the brush arm of the first brush 2 and the brush arm of the second brush 3 form an angle of 90 ° with each other.
In this embodiment, the first brush 2 and the second brush 3 are assembled on the end cap body 1 in a right angle, so that the internal space of the dc motor occupied by the whole brush structure can be reduced, and the above design can be applied to a micro motor with a motor frame diameter of less than 20 mm.
Further, the first support 8, the second support 9 and the end cover body 1 are of an integrally formed structure, and the first support 8 and the second support 9 are of groove structures.
It should be noted that, after the first bracket 8 and the second bracket 9 are integrally formed with the end cap body 1, the first bracket 8 and the second bracket 9 are substantially groove structures disposed on the inner side surface of the end cap body 1, and the first brush 2 and the second brush 3 are fixed on the groove structures.
Further, the first brush 2 is connected with a first wiring pole 4, the first wiring pole 4 is installed on the first support 8, and the first wiring pole 4 is connected with a first lead 6.
Note that, an external power source inputs a current to the first brush 2 through the first wire 6.
Further, the second brush 3 is connected with a second wiring pole 5, the second wiring pole 5 is installed on the second support 9, and the second wiring pole 5 is connected with a second lead 7.
It should be noted that the second conductor 7 is also used to transmit the current of the external power source to the second brush 3, in the same way as the first conductor 6.
Furthermore, a threading hole 10 is formed in the outer side wall of the end cover body 1, and the first lead 6 and the second lead 7 penetrate out of the end cover body 1 through the threading hole 10.
It should be noted that, through the above design, the first wire 6 and the second wire 7 can penetrate out of the outer portion of the end cover body 1 from the threading hole 10 to be connected with a power supply, and optionally, after the end cover assembly is assembled with the outer shell 13 of the dc motor, the inner side hole wall of the threading hole 10 can be provided with a sealing ring to prevent external dust, water vapor and the like from entering the dc motor.
Further, the end cap body 1 is made of an insulating material.
Furthermore, the first electric brush 2 and the second electric brush 3 can be made of silver palladium alloy, and the electric brushes of the type are wear-resistant, so that the service life of the direct current motor can be effectively prolonged.
Further, the inner side surface of the end cover body 1 is further provided with a clamping part 11, and the clamping part 11 protrudes out of the inner side surface of the end cover body 1.
The engaging portion 11 can be connected to a corresponding engaging structure of the outer housing 13 of the dc motor, so as to achieve an effect of easy detachment, and the end cap body 1 can be directly fixedly connected to the outer housing 13 of the motor by using a glue with high viscosity, or can be fixedly connected to the outer housing 13 of the motor by using a locking screw.
Example two
The implementation is mainly improved based on the first embodiment, and specifically comprises the following steps:
in this embodiment, the first bracket 8 and the second bracket 9 are not integrally formed with the end cover body 1, the first bracket 8 is provided with a first clamping column, and the second bracket 9 is provided with a second clamping column;
a first clamping hole matched with the first clamping column is formed in the inner side surface of the end cover body 1, and the first clamping column is clamped in the first clamping hole;
it should be noted that, the first clamping column and the first clamping hole are in interference fit;
the inner side surface of the end cover body 1 is provided with a second clamping hole matched with the second clamping column, and the second clamping column is clamped in the second clamping hole.
It should be noted that the second clamping column and the second clamping hole are in interference fit.
The design in this embodiment can make first support 8, second support 9 can dismantle with end cover body 1 respectively and be connected, makes things convenient for staff's later stage to overhaul more, and when first support 8 or second support 9 were impaired, the staff can dismantle first support 8 from end cover body 1 with first support 8 or second support 9 of renewal.
Application example
Referring to fig. 1 to 9, the present application provides a dc motor, which mainly includes an outer casing 13, a stator, a rotor and the above-mentioned end cap assembly; the outer shell 13 is of a cylindrical structure, an accommodating cavity for accommodating the stator and the rotor is arranged in the outer shell, one end face of the outer shell 13 is provided with a shaft hole, and the other end face is used for being connected with the end cover assembly;
specifically, the rotor includes a rotating shaft 12, a commutator 18 and an iron core 14 fixedly connected to the rotating shaft 12, and a winding 15 wound around the iron core 14 and electrically connected to a commutator bar of the commutator 18; the output end of the rotating shaft 12 penetrates out of the outer shell 13 through the shaft hole, and in addition, two bearings 17 which are respectively connected with the front end and the rear end of the rotating shaft 12 are also arranged in the outer shell 13;
the stator comprises a plurality of magnetic components 16 which are circumferentially arranged along the rotating shaft 12, the magnetic components 16 are fixed on the inner wall of the outer shell 13, and a preset gap is formed between every two adjacent magnetic components 16;
it should be noted that, in the application example, the stator is obliquely magnetized by using an oblique magnetization method, and the preset oblique magnetization head performs oblique magnetization, and an included angle between the magnetization direction and the rotating shaft 12 ranges from 5 ° to 15 °, and preferably, the magnetization angle is 8 °. By adopting the oblique magnetizing method, the stability of the direct current motor can be improved, the change rate of the torque of the direct current motor during starting and stopping is reduced, and the starting and stopping time of the direct current motor is effectively shortened;
the end cover body 1 of the end cover assembly is detachably connected to the outer shell 13, and the first brush 2 and the second brush 3 are located on the periphery of the commutator 18 and are symmetrical with respect to the axis of the rotating shaft 12.
Furthermore, the inner side surface of the end cover body 1 is also provided with a clamping part 11, and the clamping part 11 protrudes out of the inner side surface of the end cover body 1;
the tail end face of the outer shell 13 is provided with a clamping groove matched with the clamping part 11, and the clamping part 11 is clamped in the clamping groove.
It should be noted that, through the above design, the end cover body 1 can be quickly and fixedly connected or detached with the outer shell 13, which is more convenient for the operation of the worker.
Further, the rotor in the present application example is a four-pole six-slot rotor structure.
Further, the outer case 13 in this application example is made of an alloy material, which has a high hardness.
It is right above the utility model provides an end cover subassembly and direct current motor have carried out detailed introduction, to the general technical personnel in this field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.
Claims (10)
1. An end cap assembly comprising an end cap body, a first brush and a second brush;
the end cover comprises an end cover body and is characterized in that a first support and a second support are arranged on the inner side surface of the end cover body, the first support and the second support are symmetrical about the center of the end cover body, a first electric brush is fixedly installed on the first support, a second electric brush is fixedly installed on the second support, and the first electric brush and the second electric brush form an included angle of 90 degrees.
2. The end cap assembly of claim 1, wherein the first and second brackets are integrally formed with the end cap body and are each of a channel structure.
3. The end cap assembly of claim 1, wherein the first bracket has a first snap post disposed thereon and the second bracket has a second snap post disposed thereon;
the inner side surface of the end cover body is provided with a first clamping hole matched with the first clamping column, and the first clamping column is clamped in the first clamping hole;
the inner side surface of the end cover body is provided with a second clamping hole matched with the second clamping column, and the second clamping column is clamped in the second clamping hole.
4. The end cap assembly of claim 1, wherein the inside surface of the end cap body is further provided with a snap feature that is convex to the inside surface of the end cap body.
5. The end cap assembly of claim 1, wherein the first brush is connected with a first terminal post, the first terminal post is mounted on the first bracket, and the first terminal post is connected with a first wire.
6. An end cap assembly according to claim 5, wherein the second brush is connected with a second terminal post, the second terminal post being mounted on the second bracket, the second terminal post being connected with a second wire.
7. The end cap assembly of claim 6, wherein the outer sidewall of the end cap body is provided with a threading hole, and the first and second wires pass through the threading hole and out of the end cap body.
8. The end cap assembly of claim 1, wherein the end cap body is fabricated from an insulating material.
9. A dc motor comprising an outer housing, a stator, a rotor and an end cap assembly according to any one of claims 1 to 8;
the rotor comprises a rotating shaft, a commutator and an iron core which are fixedly connected with the rotating shaft, and a winding which is wound on the iron core and is electrically connected with a commutator bar of the commutator;
the stator comprises a plurality of magnetic components which are circumferentially arranged along the rotating shaft, the magnetic components are fixed on the inner wall of the outer shell, and a preset gap is formed between every two adjacent magnetic components;
the end cover body of the end cover assembly is detachably connected to the outer shell, and the first electric brush and the second electric brush are located on the periphery of the commutator and are symmetrical relative to the axis of the rotating shaft.
10. The direct current motor of claim 9, wherein the inner side surface of the end cap body is further provided with a clamping portion protruding outward from the inner side surface of the end cap body;
the tail end face of the outer shell is provided with a clamping groove matched with the clamping part, and the clamping part is clamped in the clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023117297.XU CN213846396U (en) | 2020-12-22 | 2020-12-22 | End cover assembly and direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023117297.XU CN213846396U (en) | 2020-12-22 | 2020-12-22 | End cover assembly and direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213846396U true CN213846396U (en) | 2021-07-30 |
Family
ID=77000047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023117297.XU Active CN213846396U (en) | 2020-12-22 | 2020-12-22 | End cover assembly and direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213846396U (en) |
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2020
- 2020-12-22 CN CN202023117297.XU patent/CN213846396U/en active Active
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