Motor and electric tool
By designing stator and rotor assemblies in the motor, and uniformly distributing terminal assemblies at a 120° angle to the armature shaft, the problem of increased motor size in compact power tools is solved, achieving a compact structure and high adaptability, facilitating automated winding, and improving manufacturing efficiency.
Patent Information
- Application Number
- CN202423320744.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing power tools with compact structures and limited internal space, the connection relationship between the winding input and output ends increases the radial and axial dimensions of the motor, making it difficult to further compact the motor size and resulting in insufficient adaptability.
The design employs stator and rotor assemblies. The terminals of the terminal assembly form an angle of not less than 90° with the vertical line of the armature shaft, and the three terminals are evenly distributed. The terminals are slidably installed via guide rails. The stator bracket is equipped with a hook to connect the winding end. Combined with the fan end plate and bearing structure, a compact motor design is achieved.
It improves the compactness and adaptability of the motor structure, facilitates automated winding, and enhances the manufacturing efficiency and adaptability of the motor.
Smart Images
Figure CN223858944U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to an electric machine and electric tools. BACKGROUND
[0002] As a power source, the electric machine is widely used in various electric tools. Generally, the electric machine drives a transmission assembly or an output assembly by outputting a torque. For some electric tools with compact structure and small space in the housing, on the one hand, the electric machine needs to output strong power, and on the other hand, the size of the electric machine needs to be limited in a preset range, which requires the structure of the electric machine to be more compact. For the prior art, due to the connection relationship between the access end and the exit end of the winding, and the connection of the external power control line, the radial size and the axial size of the electric machine are increased to different degrees. How to reduce the size of the electric machine to make the electric machine more compact and higher in adaptability is a technical problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL
[0003] To solve the above technical problems, the utility model provides a compact and high adaptability electric machine.
[0004] In order to realize the above target, the utility model adopts the following technical scheme:
[0005] An electric machine, comprising:
[0006] A stator assembly, comprising a stator core, a stator winding wound on the stator core, and a stator support, the stator winding comprising an access end accessing the stator core and an exit end exiting the stator core;
[0007] A rotor assembly, penetrating the stator core, comprising an armature shaft extending in a first direction;
[0008] A terminal assembly, comprising a terminal seat mounted to the stator support, and a plurality of terminals retained in the terminal seat, the included angle between the two straight lines with the shortest distance between the adjacent two terminals and the armature shaft is not less than 90°, so that the structure is compact and the automatic winding is facilitated.
[0009] Further, the electric machine comprises three terminal assemblies, three terminals are fixed to the corresponding terminal seats, and the three terminals are parallel to each other and have equal spacing.
[0010] Further, the three terminals are uniformly distributed, and the included angle between the adjacent two terminals and the perpendicular line of the armature shaft is 120°.
[0011] Further, the terminal seat has a guide rail extending in the first direction, and the terminal is slidingly mounted in the terminal seat.
[0012] Further, the terminal comprises a hook portion, and the access end and the outgoing end of the stator winding pass through the hook portion.
[0013] Further, the stator support comprises an upper support installed on the upper end of the stator core, and the terminal assembly is installed on the upper support, and the terminal assembly comprises a terminal seat, and both sides of the terminal seat are provided with guide rails, and the terminal is slidably assembled into the terminal seat through the guide rails.
[0014] Further, the terminal further comprises a connecting portion for connecting a power supply line.
[0015] Further, a fan end plate and a bearing are further included, the armature shaft penetrates through the fan end plate and the bearing, the fan end plate is located below the stator assembly, and the bearing is located above the fan end plate.
[0016] In another aspect, the application further provides an electric tool comprising the motor as described in any one of the preceding aspects.
[0017] Advantages:
[0018] The motor is improved on the terminal assembly, three terminal assemblies comprise a terminal seat installed on the stator support and a terminal retained on the terminal seat, and the included angle of the three terminal assemblies to the vertical line of the armature shaft is 120°. By uniformly arranging the three terminal assemblies, the structure is compact, automatic winding is facilitated, the manufacturing efficiency of the motor is improved, and the adaptability of the motor is higher. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 is a schematic view of the motor in the embodiment of the utility model.
[0020] Fig. 2 is an exploded schematic view of the motor in the embodiment of the utility model.
[0021] Fig. 3 is another angle schematic view of the motor in the embodiment of the utility model. DETAILED DESCRIPTION
[0022] The exemplary embodiments will be described in detail herein with reference to the attached drawings. When the description below refers to attaching, connecting, or the like, it is to be understood that the attachment or connection can be directly or indirectly, and can be removable or non-removable. The description below refers to terms such as first, second, etc. These terms are used to distinguish one element from another. It is clear that these terms are interchangeable under proper circumstances so that the technical features described as the first element can be referred to as the second element and vice versa. The following exemplary embodiments described in the following description do not represent all the embodiments consistent with the present application.
[0023] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0024] This embodiment discloses a motor 100, such as Figs. 1-3 As shown. The motor 100 includes a stator assembly 2, which includes a stator core 21, a stator winding, and a stator support 22. The stator winding includes an input end (not shown) that connects to the stator core and an output end (not shown) that connects out of the stator core.
[0025] The motor 100 also includes a rotor assembly 3 and a terminal assembly 4, which are disposed in the stator core 21 and include an armature shaft 31 extending along a first direction. The terminal assembly 4 includes a terminal seat 41 mounted to the stator support 22 and a plurality of terminals 42 held in the terminal seat 41. The angle between two adjacent terminals 42 and the perpendicular line of the armature shaft is not less than 90°, which makes the structure compact and facilitates automated winding.
[0026] Preferably, the motor 100 includes three terminal assemblies 4, and three terminals 42 are fixed to corresponding terminal blocks 41. The three terminals 42 are parallel to each other and equally spaced. The three terminals 42 are evenly distributed, and the angle between the two straight lines that shorten the distance between two adjacent terminals 42 and the armature shaft 31 is 120°.
[0027] The terminal seat 41 has a guide rail 43 extending along the first direction L, and the terminal 42 is slidingly mounted to the terminal seat 41. The terminal 42 comprises a hook portion 44, and the access end and the outgoing end of the stator winding pass through the hook portion 44.
[0028] Preferably, the stator support 22 comprises an upper support 23 mounted to the upper end of the stator core 21, and the terminal assembly 4 is mounted to the upper support 23. The terminal assembly 4 comprises a terminal seat 41, and both sides of the terminal seat 41 have a guide rail 43. The terminal 42 is slidingly assembled into the terminal seat 41 through the guide rail 43. The terminal 42 further comprises a connecting portion 45 for connecting a power line.
[0029] The motor 100 further comprises a fan end plate 5 and a bearing 6. The armature shaft 31 penetrates the fan end plate 5 and the bearing 6, and the fan end plate 5 is located below the stator assembly, and the bearing 6 is located above the fan end plate 5.
[0030] In another aspect, the application also provides an electric tool comprising the motor as described in any one of the preceding embodiments. Of course, the electric tool further comprises a housing, a transmission mechanism, an output shaft and the like, and the embodiments will not be described again. The electric tool is, for example, a drill, a hammer drill, an angle grinder, a sander, a jigsaw and the like.
[0031] The motor 100 is improved in the terminal assembly 4. The three terminal assemblies 4 comprise a terminal seat 41 mounted to the stator support, and a terminal 42 held on the terminal seat. The included angle of the three terminal assemblies 42 to the vertical line of the armature shaft 31 is 120°. By uniformly arranging the three terminal assemblies 4, the structure is compact, the automatic winding is facilitated, the manufacturing efficiency of the motor is improved, and the adaptability of the motor is higher.
[0032] The above only describes the preferred embodiments of the application, and does not limit the application in any form. Although the application has been disclosed as the above preferred embodiments, it is not intended to limit the application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the application, and the equivalent embodiments with equivalent changes are obtained. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the application are still within the scope of the technical solution of the application.
Claims
1. An electric machine characterized in that, The motor comprises: a stator assembly comprising a stator core, a stator winding wound on the stator core, and a stator support, the stator winding comprising an access end and an exit end; a rotor assembly comprising an armature shaft extending in a first direction and penetrating the stator core; a terminal assembly comprising a terminal seat mounted to the stator support, and a plurality of terminals retained in the terminal seat, an included angle between two adjacent terminals and a perpendicular line of the armature shaft being not less than 90°.
2. The electric machine of claim 1, wherein, The motor comprises three terminal assemblies, three terminals are fixed to corresponding terminal seats, and the three terminals are parallel to each other and have equal spacing.
3. The electric machine of claim 2, wherein, The three terminals are uniformly distributed, and an included angle between two straight lines of shortest distances between two adjacent terminals and the armature shaft is 120°.
4. The electric machine of claim 2, wherein, The terminal seat has a guide rail extending in the first direction, and the terminal is slidingly mounted to the terminal seat.
5. The electric machine of claim 4, wherein, The terminal comprises a hook portion, and the access end and the exit end of the stator winding pass through the hook portion.
6. The electric machine of claim 1, wherein, The stator support comprises an upper support mounted to an upper end of the stator core, the terminal assembly is mounted to the upper support, the terminal assembly comprises a terminal seat, both sides of the terminal seat have guide rails, and the terminal is slidingly assembled into the terminal seat through the guide rails.
7. The electric machine of claim 6, wherein, The terminal further comprises a connecting portion for connecting a power line.
8. The electric machine of claim 7, wherein, The motor further comprises a fan end plate and a bearing, the armature shaft penetrates the fan end plate and the bearing, the fan end plate is located below the stator assembly, and the bearing is located above the fan end plate.
9. A power tool characterized by: The motor comprises any one of the motors according to claims 1 to 8. The motor comprises any one of the motors according to claims 1 to 8.