CN214412453U - Motor and conductive brush structure thereof - Google Patents
Motor and conductive brush structure thereof Download PDFInfo
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- CN214412453U CN214412453U CN202022802256.8U CN202022802256U CN214412453U CN 214412453 U CN214412453 U CN 214412453U CN 202022802256 U CN202022802256 U CN 202022802256U CN 214412453 U CN214412453 U CN 214412453U
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Abstract
The utility model relates to a motor and a conductive brush structure thereof, wherein the motor comprises a shell, an end cover and a rotating shaft; the motor also comprises an isoelectric connecting part which is used for electrically connecting the end cover and the rotating shaft so as to realize equipotential of the end cover and the rotating shaft; defining one of the end cover and the rotating shaft as a first part and defining the other of the end cover and the rotating shaft as a second part; the isoelectric connecting component comprises a conductive brush structure fixedly arranged on the first component, the conductive brush structure comprises a conductive base body fixedly arranged on the first component, a conductive brush is arranged on the side surface, facing the second component, of the conductive base body, the conductive brush comprises brush wires extending towards the second component, and the brush wires are used for being in direct or indirect sliding conductive contact with the second component when the first component and the second component rotate relatively.
Description
Technical Field
The utility model relates to a motor and electrically conductive brush structure thereof.
Background
With the rapid development of the new energy automobile industry, the requirement for the electromagnetic compatibility of the whole automobile is gradually improved, the electromagnetic compatibility of parts is the basis and premise of the electromagnetic compatibility of the whole automobile, and the new energy automobile needs the parts to reduce the disturbance intensity as much as possible, so that the electromagnetic compatibility of the whole automobile is improved. The driving motor is used as a high-voltage core component of a new energy automobile power system, and an electromagnetic interference component is arranged inside the driving motor. On one hand, because the power supply voltage of the inverter contains higher harmonic components, the electromagnetic induction is generated among the end part of the stator winding coil, the wiring part and the rotating shaft, so that the shaft voltage is generated; on the other hand, because the magnetic circuit in the motor is unbalanced, shaft voltage is induced at two ends of the rotating shaft. The motor can produce electromagnetic interference to other low pressure spare parts when high frequency operation, when the extreme withstand voltage of axle voltage surpassed bearing grease, can puncture grease, forms the loop axle electric current between pivot, bearing, end cover and casing, because of bearing area of contact is little, current density is big, can cause the bearing electroerosion, can lead to the bearing to appear dull polish, indent groove after the motor long-term operation, finally leads to the bearing to become invalid.
To this end, chinese patent application with application publication No. CN102510175A discloses an electromagnetic compatibility structure of an automotive alternator and an alternator having the same, which includes a housing, end covers are usually packaged at two ends of the housing, a stator, a rotor and a rotating shaft fixed to the rotor (i.e., an alternator rotor shaft in the patent application) are disposed in the housing, a slip ring is fixed to the rotating shaft, a brush is mounted on a negative electrode of the alternator (including components directly connected to the housing, such as the housing), and an elastic force is applied to the brush through a spring to press the brush against the slip ring. The effective electric connection of the rotating part and the non-rotating part in the motor is realized through the contact of the slip ring and the electric brush, so that the electromagnetic interference is suppressed.
However, current motors have some drawbacks: the brush in this patent application is traditional brush, and the brush is the block, and the rear end need keep with the contact of sliding ring with the spring roof pressure, and the wearing and tearing of brush are great during the use, need regularly maintain, lead to short, the reliability of motor life-span lower.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a motor to solve the technical problems of the prior art that the brush of the motor is worn greatly and needs to be maintained and replaced regularly; still provide a conductive brush structure of motor to solve above-mentioned technical problem.
In order to achieve the above object, the utility model discloses the technical scheme of motor is: an electric machine comprising:
a housing;
end covers packaged at two ends of the shell;
a rotating shaft;
the motor further includes:
the isoelectric connecting component is used for electrically connecting the end cover and the rotating shaft so as to realize equipotential of the end cover and the rotating shaft;
defining one of the end cover and the rotating shaft as a first part and defining the other of the end cover and the rotating shaft as a second part;
the isoelectric connecting component comprises a conductive brush structure fixedly arranged on the first component, the conductive brush structure comprises a conductive base body fixedly arranged on the first component, a conductive brush is arranged on the side surface, facing the second component, of the conductive base body, the conductive brush comprises brush wires extending towards the second component, and the brush wires are used for being in direct or indirect sliding conductive contact with the second component when the first component and the second component rotate relatively.
The utility model has the advantages that: the conductive brush wire is in direct or indirect sliding conductive contact with the second component, the brush wire has certain strength, hardness and wear resistance, and compared with an electric brush pressed by a spring in the prior art, the electric brush wire has smaller contact force with the second component, is less worn and does not need to be replaced periodically. In practice, it is possible to ensure that the second part is in direct or indirect sliding conductive contact even if wear occurs by increasing the length of the brush filaments or by increasing the number of brush filaments.
As a further preferred solution, the second part is provided with an electrical conductor for cooperation with the brush filaments.
The scheme has the advantages that the second part is provided with the electric conductor, so that the electric conductor is convenient to replace even if the electric conductor is abraded in use.
As a further optimized scheme, the end cover comprises a rear end cover, and the rear end cover and the rear end of the rotating shaft are arranged at intervals in the front-rear direction;
the conductor is fixed at the rear end part of the rotating shaft.
The effect of this scheme lies in, utilizes the interval between rear end cap and the pivot to install the electric conductor, and the mounting means is simple.
As a further optimized scheme, the electric conductor and the rotating shaft are inserted together in an interference mode.
As a further optimized scheme, the end cover further comprises a front end cover;
the front end cover is fixedly provided with the conductive brush structure, and the conductive brush of the conductive brush structure on the front end cover is in direct conductive contact with the rotating shaft.
As a further optimized scheme, at least two conductive brushes are arranged along the circumferential direction.
As a further optimized scheme, the end cover is the first part, the rotating shaft is the second part, the conductive substrate is a conductive ring, and the conductive brush is fixedly arranged on the inner circumferential surface of the conductive ring.
The effect of this scheme lies in, electrically conducts the brush and fixes on the end cover, and the end cover need not rotate when using, prevents to electrically conduct the brush and receives the centrifugal force effect and take place too big swing.
The utility model discloses the technical scheme of the electrically conductive brush structure of motor is: a conductive brush structure of an electric machine, comprising:
the conductive base body is fixed on one of the end cover and the rotating shaft;
and the conductive brush is fixedly arranged on the conductive base body and comprises brush wires extending towards the other one of the end cover and the rotating shaft, and the brush wires are used for being in direct or indirect sliding conductive contact with the corresponding end cover or the corresponding rotating shaft when the end cover and the rotating shaft rotate relatively.
The utility model has the advantages that: the conductive brush wire is in direct or indirect sliding conductive contact with the end cover or the rotating shaft, the brush wire has certain strength, hardness and wear resistance, and compared with an electric brush pressed by a spring in the prior art, the electric brush has the advantages of smaller contact force and smaller wear, and does not need to be replaced regularly. In actual manufacturing, the length of the brush wires or the number of the brush wires can be increased to ensure that the brush wires can directly or indirectly slide and electrically contact with the end cover or the rotating shaft even if abrasion occurs.
As a further preferred solution, the electrically conductive brushes are arranged for at least two about the axis of the rotating shaft.
As a further optimized scheme, the conductive base is a conductive ring fixedly mounted on the end cover, and the conductive brush is fixedly arranged on the inner circumferential surface of the conductive ring.
The effect of this scheme lies in, electrically conducts the brush and fixes on the end cover, and the end cover need not rotate when using, prevents to electrically conduct the brush and receives the centrifugal force effect and take place too big swing.
Drawings
Fig. 1 is a schematic view of an embodiment 1 of the motor of the present invention (only half of the structure is shown in the figure);
FIG. 2 is a schematic view of the conductive brush structure of FIG. 1;
description of reference numerals:
in the attached figure 1: 101-a housing; 102-a front end cap; 103-rear end cap; 104-a stator; 105-a rotor; 106-a rotating shaft; 107-bearings; 108-a rotary transformer; 109-a conductive brush structure; 110-an electrical conductor; 111-oil seal;
in the attached fig. 2: 109-a conductive brush structure; 1091-a conductive base; 1092-conductive brush.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses a concrete embodiment 1 of motor:
as shown in fig. 1 and fig. 2, the motor includes a housing 101, a front cover 102 enclosed at the front end of the housing 101, and a rear cover 103 enclosed at the rear end of the housing 101, where the front and rear are distinguished based on the direction in which the rotating shaft 106 penetrates, and the direction in which the rotating shaft 106 penetrates is the front.
The casing 101 is fixedly provided with a stator 104 and a rotor 105, and a rotating shaft 106 is fixedly connected with the rotor 105. Bearings 107 are mounted on both the front and rear end caps 102, 103 for supporting and positioning the shaft 106. An oil seal 111 is fixed between the front end cover 102 and the rotating shaft 106 to prevent foreign matters from entering. A rotary transformer 108 is installed between the rear end cover 103 and the rotating shaft 106, and the rotary transformer 108 is used for detecting the position and the rotating speed information of the motor rotor.
In order to achieve equipotential between the rotating shaft 106 and the casing 101 and the fixed parts fixedly connected to the casing 101, and suppress electromagnetic interference, in the present embodiment, an electrical connection part is disposed in the casing 101, where the electrical connection part includes a conductive brush structure 109 fixed on the rear end cap 103 and a conductive body 110 fixed at the rear end of the rotating shaft 106.
As shown in fig. 2, the conductive brush structure 109 includes a conductive base 1091, where the conductive base 1091 is a conductive ring, the conductive base 1091 is made of copper, and other metal materials with high strength and good conductivity may be used in other embodiments. Four conductive brushes 1092 are fixed inside the conductive base 1091, wherein the shape and structure of the conductive brushes 1092 are similar to those of a brush in daily life. The conductive brush 1092 includes a plurality of brush filaments, the brush filaments in this embodiment are made of conductive fibers having good conductivity, and the brush filaments have certain strength, hardness and wear resistance and can swing when in use. Four conductive brushes 1092 are uniformly distributed on the inner peripheral surface of the conductive base 1091 in the circumferential direction of the conductive base 1091. In actual manufacturing, the conductive brush 1092 may be fixed on the conductive base 1091 by gluing, or the conductive brush 1092 may include an arc plate, and each brush filament is fixed on the arc plate and then fixedly mounted on the conductive base 1091 by bolting.
The conductor 110 is made of copper, and other metal materials with higher hardness and good conductivity can be used in other embodiments.
As shown in fig. 1, since there is a gap between the rear end of the rotating shaft 106 and the rear end cover 103, in order to facilitate installation, in this embodiment, the conductive body 110 is fixed at the end of the rear end of the rotating shaft 106 by interference fit. After assembly, the conductive body 110 is opposite to the conductive brush structure 109 in the radial direction, the conductive body 110 is located inside the conductive brush structure 109, and the conductive brush 1092 of the conductive brush structure 109 is in contact with the outer peripheral surface of the conductive body 110. When the motor works, the conductive brush 1092 and the conductor 110 rotate relatively, and the conductive brush 1092 brushes over the outer peripheral surface of the conductor 110 to realize conductive contact. In actual manufacturing, the conductive brush 1092 can swing, the conductive brush 1092 can be made longer, and the conductive brush 1092 can be provided with more brush filaments, and the contact force between the conductive brush 1092 and the conductor 110 is smaller, so that the conductive brush 1092 is less worn, and does not need to be replaced periodically, and generally, the conductive brush 1092 does not need to be replaced within the service life of the motor.
In practice, the front cover 102 is in direct conductive contact with the shaft 106, and the structure thereof is not shown in the figure. Specifically, a conductive brush structure 109 is fixed inside the front cover 102, and a conductive brush 1092 of the conductive brush structure 109 directly contacts with the rotating shaft 106 for conduction.
The conductive brush structure 109 may be mounted on the rear end cap 103 and the front end cap 102 in an interference fit manner, or may be mounted by using bolts.
In this embodiment, the end cap is provided with a conductive brush structure 109 as a first component, and the rotating shaft is provided with a conductive body 110 as a second component.
The utility model discloses embodiment 2 of motor:
in example 1, the end cap is the first member and the shaft is the second member. In this embodiment, the end cap may be a second component, the rotating shaft is a first component, the conductive brush structure is mounted on the rotating shaft, and the conductive brush on the conductive brush structure is fixed on the outer circumferential surface of the conductive base body in order to be in conductive contact with the end cap in a matching manner, and the specific fixing manner is consistent with that of embodiment 1, and is not described herein again. The conductive substrate can be a ring or a block fixed at one end of the rotating shaft.
The utility model discloses embodiment 3 of motor:
in example 1, four conductive brushes were arranged in the circumferential direction. In this embodiment, the number of the conductive brushes may be changed according to actual situations, for example, there may be two, three, or more than four, and actually there may be only one conductive brush.
The utility model discloses embodiment 4 of motor:
in example 1, the front and rear covers and the rotary shaft are provided with an electrical connection member therebetween. In this embodiment, an electrical connection member may be provided between only one of the front and rear end caps and the rotary shaft.
The utility model discloses embodiment 5 of motor:
in embodiment 1, the conductor is fixed to one end of the rotating shaft, and the conductor and the rotating shaft are inserted together in an interference manner. In this embodiment, the conductive body may be fixed to one end of the rotating shaft by a bolt connection. It should be noted that, in actual manufacturing, if there is no interval in the front-back direction between the rear end cover and the rotating shaft, the electric conductor may be designed as a ring body, and is sleeved outside the rotating shaft.
The utility model discloses embodiment 6 of motor:
in example 1, a conductor is provided on the second member. In this embodiment, the second member is not provided with a conductive body, and the conductive brush is directly contacted with the second member to realize electric conduction.
The utility model discloses the concrete embodiment of the electrically conductive brush structure of motor:
the structure of the conductive brush is the same as that of the conductive brush in the embodiments of the motor, and the description is omitted here.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electric machine comprising:
a housing (101);
the end covers are packaged at two ends of the shell (101);
a rotating shaft (106);
the method is characterized in that: the motor further includes:
the isoelectric connecting component is used for electrically connecting the end cover and the rotating shaft (106) so as to realize equipotential of the end cover and the rotating shaft (106);
defining one of the end cap and the rotating shaft (106) as a first part and defining the other of the end cap and the rotating shaft (106) as a second part;
the isoelectric coupling component comprises a conductive brush structure (109) fixedly arranged on the first component, the conductive brush structure (109) comprises a conductive base body (1091) fixedly arranged on the first component, a conductive brush (1092) is arranged on the side surface, facing the second component, of the conductive base body (1091), the conductive brush (1092) comprises brush filaments extending towards the second component, and the brush filaments are used for being in direct or indirect sliding conductive contact with the second component when the first component and the second component rotate relatively.
2. The electric machine of claim 1, wherein: the second part is provided with an electrical conductor (110) for cooperation with the brush filaments.
3. The electric machine of claim 2, wherein: the end covers comprise rear end covers (103), and the rear end covers (103) and the rear ends of the rotating shafts (106) are arranged at intervals in the front-rear direction;
the conductor (110) is fixed to the rear end of the rotating shaft (106).
4. The electric machine of claim 3, wherein: the conductor (110) and the rotating shaft (106) are inserted together in an interference manner.
5. The electric machine of claim 3, wherein: the end cap further comprises a front end cap (102);
the front end cover (102) is fixedly provided with the conductive brush structure (109), and a conductive brush (1092) of the conductive brush structure (109) on the front end cover (102) is in direct conductive contact with the rotating shaft (106).
6. The electric machine according to any of claims 1-5, characterized in that: at least two conductive brushes (1092) are arranged along the circumferential direction.
7. The electric machine according to any of claims 1-5, characterized in that: the end cover is the first part, the rotating shaft (106) is the second part, the conductive base body (1091) is a conductive ring, and the conductive brush (1092) is fixedly arranged on the inner circumferential surface of the conductive ring.
8. The utility model provides a conductive brush structure of motor which characterized in that: the method comprises the following steps:
a conductive base (1091) for fixing to one of the end cap and the rotary shaft (106);
and the conductive brush (1092) is fixedly arranged on the conductive base body (1091), the conductive brush (1092) comprises brush filaments which extend towards the other one of the end cover and the rotating shaft (106), and the brush filaments are used for being directly or indirectly in sliding conductive contact with the corresponding end cover or the rotating shaft (106) when the end cover and the rotating shaft (106) relatively rotate.
9. The conductive brush structure of an electric machine according to claim 8, characterized in that: the conductive brushes (1092) are arranged at least two about the axis of the rotating shaft (106).
10. The conductive brush structure of an electric machine according to claim 8 or 9, characterized in that: the conductive base (1091) is a conductive ring fixedly mounted on the end cover, and the conductive brush (1092) is fixedly arranged on the inner circumferential surface of the conductive ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022802256.8U CN214412453U (en) | 2020-11-27 | 2020-11-27 | Motor and conductive brush structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022802256.8U CN214412453U (en) | 2020-11-27 | 2020-11-27 | Motor and conductive brush structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214412453U true CN214412453U (en) | 2021-10-15 |
Family
ID=78036529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022802256.8U Active CN214412453U (en) | 2020-11-27 | 2020-11-27 | Motor and conductive brush structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214412453U (en) |
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2020
- 2020-11-27 CN CN202022802256.8U patent/CN214412453U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: No.1, Shibali Heyu Road, Guancheng Hui District, Zhengzhou City, Henan Province Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
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| CP03 | Change of name, title or address |