CN217935375U - Motor assembly, electric chain saw and electric tool - Google Patents
Motor assembly, electric chain saw and electric tool Download PDFInfo
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- CN217935375U CN217935375U CN202221974043.6U CN202221974043U CN217935375U CN 217935375 U CN217935375 U CN 217935375U CN 202221974043 U CN202221974043 U CN 202221974043U CN 217935375 U CN217935375 U CN 217935375U
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- shell
- main body
- circuit board
- filter circuit
- conductive elastic
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Abstract
The utility model discloses a motor element, electric chain saw and electric tool overcome the vibrations in the motor working process and lead to filter circuit board and motor housing contact failure's problem. Wherein motor element includes: the motor comprises a shell and a bearing support, the bearing support is arranged at one end of the shell and comprises a main body part and a step part, one end of the main body part is connected with the shell, and the step part is arranged at the other end of the main body part; the filter circuit board is fixed at one end of the shell and is positioned at one side of the bearing support far away from the shell, and a through hole for the step part to penetrate through is formed in the position of the filter circuit board corresponding to the step part; the conductive elastic piece elastically abuts between the filter circuit board and the end of the shell, and the conductive elastic piece is arranged around the circumferential direction of the main body part; the first end of the conductive elastic piece is abutted to the grounding electrode of the filter circuit board, and the second end of the conductive elastic piece is connected with the conductive part of the shell, so that the shell is conducted with the grounding electrode.
Description
Technical Field
The utility model relates to a motor field especially relates to a motor element, electric chain saw and electric tool.
Background
In recent years, as the national standard for the electromagnetic radiation quantity of the motor is higher and higher, two common improvement modes are provided at present, one is to add a filter circuit at the internal lead of the motor, the other is to add a filter circuit at the external lead of the motor, no matter the filter circuit is added internally or externally, a part of circuits are required to be connected with a metal shell of the motor, because the operation of the motor belongs to the conversion of electric energy into mechanical energy, the motor can not avoid the generation of vibration, the vibration can cause the poor contact between the filter circuit and the motor shell, and the poor contact between the motor shell and the filter circuit can cause the great influence on the filter effect. Therefore, how to make the motor vibrate without causing poor contact between the filter circuit and the motor shell becomes a technical problem which needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves provides a motor element, electric chain saw and electric tool, overcomes vibrations in the motor working process and leads to filter circuit board and motor housing contact failure's problem.
In order to solve the above technical problem, a first aspect of the present invention provides a motor assembly, including:
the motor comprises a shell and a bearing support, wherein the bearing support is arranged at one end of the shell and comprises a main body part and a step part, one end of the main body part is connected with the shell, the step part is arranged at the other end of the main body part, and the radial dimension of the step part is smaller than that of the main body part;
the filtering circuit board is fixed at one end of the shell and is positioned on one side, far away from the shell, of the bearing support, a through hole for the step part to penetrate through is formed in the position, corresponding to the step part, of the filtering circuit board, and the section size of the through hole is larger than the radial size of the step part but smaller than the radial size of the main body part; and
the conductive elastic piece elastically props against the part between the filter circuit board and the end of the shell, and is arranged around the circumferential direction of the main body part;
the first end of the conductive elastic piece is abutted to the grounding electrode of the filter circuit board, and the second end of the conductive elastic piece is connected with the conductive part of the shell, so that the shell is conducted with the shell.
Optionally, the conductive elastic member is a metal spring, the metal spring is sleeved on the main body portion, and a diameter of the metal spring is larger than a radial size of the main body portion.
Optionally, the height of the main body portion protruding from the surface of the housing is not greater than the distance between the filter circuit board and the housing.
Optionally, the main body portion is cylindrical, the step portion is also cylindrical, and the step portion and the main body portion are arranged coaxially; correspondingly, the through hole is also a circular hole.
Optionally, the housing is concavely provided with a fixing groove surrounding the bearing bracket, and the second end of the conductive elastic member is connected in the fixing groove.
Optionally, the fixing groove surrounds a circumferential direction of the body portion.
Optionally, the ground electrode is disposed on the surface of the filter circuit board in a multi-point or annular shape corresponding to the first end of the conductive elastic element.
Optionally, the housing is provided with a wiring component on each of two sides of the bearing support, the wiring components are respectively and fixedly connected to the filter circuit board, and the wiring components are conducted with the output end of the filter circuit board.
Optionally, the connection component is a lug or a binding post, a jack is formed in the filter circuit board corresponding to the connection component, and the connection component is inserted into the jack and is fixedly connected with the jack.
Optionally, two of the junction blocks are symmetrically arranged with respect to the bearing bracket.
Optionally, the housing is further provided with two positioning grooves symmetrically arranged at the edge for assembling the motor.
Optionally, a second aspect of the present invention provides an electric chain saw comprising the motor assembly described above.
Optionally, a third aspect of the present invention provides an electric tool, comprising the motor assembly described above.
Implement the utility model discloses, following beneficial effect has:
the utility model provides a motor element sets up electrically conductive elastic component between filter circuit board and motor, forms the conducting circuit through electrically conductive elastic component between the shell of filter circuit board and motor on the one hand, and on the other hand electrically conductive elastic component utilizes the elasticity shock attenuation of self to can overcome vibrations in the motor working process lead to and filter circuit board between contact failure, reduce the energy of motor radiation interference. In addition, the cost of the conductive elastic piece is low and the installation is convenient.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
Fig. 1 is a schematic structural diagram of a motor assembly according to an embodiment of the present invention;
fig. 2 is a schematic exploded perspective view of a motor assembly according to an embodiment of the present invention;
fig. 3 is a partially enlarged schematic view of fig. 2.
Reference numbers in the figures:
1-a motor; 11-a housing; 12-a bearing support; 13-a junction block; 14-a positioning groove; 111-a fixation groove; 121-a body portion; 122-a step portion;
2-a filter circuit board; 21-a through hole; 22-a jack;
3-conductive elastic member.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 3, the present embodiment provides a motor assembly, which includes a motor 1, a filter circuit board 2 and a conductive elastic member 3, wherein the motor 1 is used as a power structure, and is powered on to operate, so as to output power during operation, thereby causing the motor to vibrate during operation, the filter circuit board 2 is disposed at one end of the motor 1, the filter circuit board 2 is used for shielding and absorbing radiation of the motor, and the conductive elastic member 3 is disposed between the filter circuit board 2 and the motor 1. The motor element that this embodiment provided sets up electrically conductive elastic component 3 between filter circuit board 2 and motor 1, forms through electrically conductive elastic component 3 between filter circuit board 2 and the shell of motor 1 on the one hand and switches on the return circuit, and the electrically conductive elastic component 3 of on the other hand utilizes the elasticity shock attenuation of self to can overcome shake in motor 1 course of operation and lead to and filter circuit board 2 between contact failure, reduce the energy of motor radiation interference. In addition, the cost of the conductive elastic part 3 is low and the installation is convenient. In order to implement the technical scheme of the embodiment, the method is implemented by the following steps:
the motor 1 is a direct current motor, and comprises a housing 11 and a bearing support 12, wherein the bearing support 12 is arranged at one end of the housing 11, and preferably, the bearing support 12 is arranged at the center of the end of the housing 11; the bearing bracket 12 includes a main body portion 121 and a step portion 122, one end of the main body portion 121 is connected to the housing 11, the step portion 122 is disposed at the other end of the main body portion 121, and a radial dimension of the step portion 122 is smaller than a radial dimension of the main body portion 121; in an alternative embodiment, the main body portion 121 is cylindrical, the step portion 122 is also cylindrical, and the step portion 122 is arranged coaxially with the main body portion 121; in implementation, the main body 121 may have a prism shape, or the stepped portion 122 may have a prism shape, as long as the radial dimension of the stepped portion 122 is smaller than that of the main body 121. The stepped portion 122 is configured to penetrate through the through hole 21 of the filter circuit board 2, so that the size of the main body portion 121 can be smaller than that of the through hole 21, and the supporting performance of the entire structure of the filter circuit board 2 is improved (that is, the smaller the size of the through hole, the smaller the influence on the supporting performance of the entire structure is).
The filter circuit board 2 is fixed at the one end of the housing 11 and sleeved on the bearing support 12, a through hole 21 for the step portion 122 to penetrate through is arranged at a position of the filter circuit board 2 corresponding to the step portion 122, and the cross-sectional dimension of the through hole 21 is larger than the radial dimension of the step portion 122 but smaller than the radial dimension of the main body portion 121; accommodate step portion 122 through-hole 21 to make motor element's overall structure size reduce, and make the connection of filter circuit board 2 more firm, reduce filter circuit board 2's vibrations, simultaneously because step portion 122's size is littleer, so make through-hole 21's size also littleer, with furthest reduce the influence to whole filter circuit board 2 structure steadiness.
The conductive elastic member 3 elastically abuts between the filter circuit board 2 and the one end of the housing 11, and the conductive elastic member 3 is circumferentially disposed around the main body portion 121. Preferably, the conductive elastic member 3 is a metal spring, the metal spring is sleeved on the main body 121, and the diameter of the metal spring is larger than the radial dimension of the main body 121, so that a gap is reserved between the conductive metal spring and the main body 121, and contact and friction between the metal spring and the main body 121 are avoided; in addition, when the size of the through hole 21 is smaller, the distance between the metal spring and the through hole 21 can be made larger, so that the metal spring can be prevented from entering the through hole 21 after vibration, and the filter circuit board 2 can be prevented from being broken or damaged due to the metal spring. The conductive elastic member 3 may be the metal spring, a metal spring plate, or the like.
Wherein, the first end of the conductive elastic element 3 is abutted against the grounding electrode of the filter circuit board 2, and the second end of the conductive elastic element 3 is connected with the conductive part of the shell 11, so that the filter circuit board 2 is conducted with the shell 11; when the housing 11 is made of a metal material, the entire housing 11 can be used as a conductive portion, and when the housing 11 is made of a non-metal material, the connecting portion between the housing 11 and the conductive elastic member 3 needs to be designed as a conductive portion, and the conductive portion is made of a conductive material.
Optionally, the height of the main body portion 121 protruding from the surface of the housing 11 is not greater than the distance between the filter circuit board 2 and the housing 11, so that the main body portion 121 does not support the filter circuit board 2, and deformation of the filter circuit board 2 due to the supporting effect of the main body portion 121 is avoided, and the optimal choice is that the height of the main body portion 121 protruding from the surface of the housing 11 is smaller than the distance between the filter circuit board 2 and the housing 11, so that a gap is reserved between the filter circuit board 2 and the main body portion 121, and the filter circuit board 2 can vibrate with a certain amplitude.
Alternatively, the housing 11 is concavely provided with a fixing groove 111 surrounding the bearing bracket 12, and the second end of the conductive elastic member 3 is coupled in the fixing groove 111. The annular design of the fixing groove 111 may receive the second end of the conductive elastic member 3 therein, so that the position of the conductive elastic member 3 is defined by the fixing groove 111 to prevent the conductive elastic member 3 from sliding on the surface of the housing 11; since the fixing groove 111 has a certain depth, the length of the conductive elastic member 3 is increased to some extent, and the anti-seismic performance of the conductive elastic member 3 is better.
Alternatively, the fixing groove 111 surrounds the circumference of the body part 121, and by this design, the conductive elastic member 3 installed in the fixing groove 111 is not easily contacted with the body part 121, so that the conductive elastic member 3 can better perform a shock absorption function.
Optionally, the ground electrode is disposed on the surface of the filter circuit board 2 in a plurality of dots or in a ring shape corresponding to the first end of the conductive elastic member 3, so that the conductive elastic member 3 is automatically in contact with the ground electrode when abutting against the filter circuit board 2.
Alternatively, the housing 11 is provided with a connection part 13 on each side of the bearing support 12, the connection parts 13 are fixedly connected to the filter circuit board 2, and the connection parts 13 are conducted with the output end of the filter circuit board 2. The wiring component 13 is as the circuit conduction structure on the one hand, provides the effect of conducting, and on the other hand sets up wiring component 13 in the both sides of bearing bracket 12, and the cover is equipped with electrically conductive elastic component 3 on the bearing bracket 12 in the middle of, provides the effect of fixed stay, and electrically conductive elastic component 3 in the middle of provides the effect of conducting through earthing pole and shell 11.
Alternatively, the terminal block 13 is a lug or a terminal, the filter circuit board 2 is provided with a jack 22 corresponding to the terminal block 13, the terminal block 13 is inserted into the jack 22 and is fixedly connected with the jack 22, and generally, the terminal block 13 and the jack 22 can be fixedly connected by welding.
Alternatively, the two terminal members 13 are symmetrically arranged with respect to the bearing holder 12, so that the force applied to the filter circuit board 2 by the two terminal members 13 and the conductive elastic member 3 outside the bearing holder 12 is more balanced.
Optionally, the housing 11 is further provided with two positioning slots 14 symmetrically arranged at the edge for assembling the motor 1.
Optionally, the present embodiment further provides an electric chain saw including the motor assembly provided in the above embodiment.
Optionally, the present embodiment further provides an electric tool, including the motor assembly provided in the above embodiment.
The electric chain saw and the electric tool provided by the embodiment adopt the motor assembly provided by the embodiment, and the conductive elastic piece is arranged between the filter circuit board and the motor, so that a conduction loop is formed between the filter circuit board and the shell of the motor through the conductive elastic piece, and the conductive elastic piece utilizes the elastic shock absorption of the conductive elastic piece, so that the defect of poor contact between the conductive elastic piece and the filter circuit board caused by the shock in the working process of the motor can be overcome, and the energy of radiation interference of the motor is reduced. In addition, the cost of the conductive elastic piece is low and the installation is convenient.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An electric machine assembly, comprising:
the motor comprises a shell and a bearing support, wherein the bearing support is arranged at one end of the shell and comprises a main body part and a step part, one end of the main body part is connected with the shell, the step part is arranged at the other end of the main body part, and the radial dimension of the step part is smaller than that of the main body part;
the filter circuit board is fixed at one end of the shell and is positioned on one side, far away from the shell, of the bearing support, a through hole for the step part to penetrate through is formed in the position, corresponding to the step part, of the filter circuit board, and the section size of the through hole is larger than the radial size of the step part but smaller than the radial size of the main body part; and
the conductive elastic piece is elastically abutted between the filter circuit board and the end of the shell, and is arranged around the circumferential direction of the main body part;
the first end of the conductive elastic piece is abutted to the grounding electrode of the filter circuit board, and the second end of the conductive elastic piece is connected with the conductive part of the shell, so that the shell is conducted with the shell.
2. The electric machine assembly of claim 1,
the conductive elastic piece is a metal spring, the metal spring is sleeved on the main body portion, and the diameter of the metal spring is larger than the radial size of the main body portion.
3. The motor assembly of claim 1,
the height of the main body part protruding out of the surface of the shell is not greater than the distance between the filter circuit board and the shell; and/or
The main body part is cylindrical, the step part is also cylindrical, and the step part and the main body part are coaxially arranged; correspondingly, the through hole is also a circular hole.
4. The motor assembly of claim 1,
the shell is concavely provided with a fixing groove surrounding the bearing support, and the second end of the conductive elastic element is connected in the fixing groove; and/or
The fixing groove surrounds the circumference of the main body part.
5. The motor assembly of claim 1,
the first end of the grounding electrode corresponding to the conductive elastic piece is arranged on the surface of the filter circuit board in a multi-point shape or a ring shape.
6. The electric machine assembly of claim 1,
the shell is provided with a wiring component on two sides of the bearing support respectively, the wiring components are fixedly connected with the filter circuit board respectively, and the wiring components are conducted with the output end of the filter circuit board.
7. The electric machine assembly of claim 6,
the wiring component is a wiring sheet or a wiring terminal, a jack is formed in the filter circuit board corresponding to the wiring component, and the wiring component is inserted into the jack and fixedly connected with the jack; and/or
The two terminal members are arranged symmetrically with respect to the bearing bracket.
8. The electric machine assembly of claim 1,
the shell is provided with two symmetrically arranged positioning grooves at the edge for the assembly of the motor.
9. An electric chain saw comprising a motor assembly according to any one of claims 1 to 8.
10. A power tool comprising a motor assembly according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221974043.6U CN217935375U (en) | 2022-07-28 | 2022-07-28 | Motor assembly, electric chain saw and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221974043.6U CN217935375U (en) | 2022-07-28 | 2022-07-28 | Motor assembly, electric chain saw and electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217935375U true CN217935375U (en) | 2022-11-29 |
Family
ID=84151941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221974043.6U Active CN217935375U (en) | 2022-07-28 | 2022-07-28 | Motor assembly, electric chain saw and electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217935375U (en) |
-
2022
- 2022-07-28 CN CN202221974043.6U patent/CN217935375U/en active Active
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