Motor, and household electrical appliance and electric tool using same
By designing an insulating body and terminal structure on the motor end cover, and using clamping arms to break the lead wire insulation layer to achieve conductive connection, combined with barbs and dovetail structures to prevent detachment, the problem of time-consuming lead wire connection in motor manufacturing is solved, improving assembly efficiency and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG JINBA INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-21
AI Technical Summary
In the motor manufacturing process, the mechanical installation of leads and the circuit connection are time-consuming, affecting manufacturing efficiency and cost.
Design a motor structure in which the end cover includes an insulating body and a terminal. The insulating body is provided with a lead wire groove and a receiving groove, and the terminal is provided with a lead wire connection groove and a clamping arm. The clamping arm breaks the lead wire insulation layer to establish a conductive connection. The barbed structure and dovetail part are combined to prevent the terminal from falling off. The elastic brush arm and capacitor are used to achieve a stable connection.
It improves the assembly efficiency and stability of the motor, simplifies the lead wire connection process, and reduces manufacturing time and cost.
Smart Images
Figure CN224154046U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an electric motor and household appliances and power tools that use the electric motor. Background Technology
[0002] An electric motor consists of a stator and a rotor rotatably mounted to the stator. The stator typically includes a housing and an end cap mounted to one end of the housing. The end cap usually houses cables such as power cables and control cables, which are used for both external connections and connections to internal leads to power the motor and its internal components. During motor manufacturing, the mechanical installation and electrical connection of these leads are time-consuming processes, impacting manufacturing efficiency and cost. Therefore, an improvement is urgently needed. Utility Model Content
[0003] One objective of this application is to improve the manufacturing efficiency of electric motors.
[0004] Therefore, in one aspect, this utility model provides an electric motor, including a stator and a rotor rotatably mounted to the stator. The stator includes a housing and an end cover mounted to the housing. The end cover includes an insulating body and a terminal. The insulating body has a lead groove and defines a first groove wall, a second groove wall, and a first groove bottom for supporting the lead. The insulating body also includes a receiving groove extending to both sides of the lead and the bottom of the receiving groove is deeper than the first groove bottom. The insulating body also includes a terminal clamping groove. The terminal body has a main body. The terminal is stably installed into the terminal clamping groove. The terminal is provided with a lead wire connection groove and a first clamping arm, a second clamping arm, and a second groove bottom that define the lead wire connection groove. The opening end of the lead wire connection groove faces the bottom of the receiving groove, and the size of the lead wire connection groove is smaller than the outer diameter of the lead wire. When the first clamping arm and the second clamping arm are respectively inserted into the receiving grooves on both sides of the lead wire, the lead wire is pushed towards the bottom of the first groove by the first clamping arm and the second clamping arm together. At least one of the first clamping arm and the second clamping arm destroys the insulating outer layer of the lead wire, thereby establishing a conductive connection with the lead wire.
[0005] In one embodiment of this utility model, the terminal is provided with a barb structure to prevent the terminal from falling out of the terminal clamping groove.
[0006] In one embodiment of this utility model, the terminal is provided with a dovetail portion to prevent the terminal from falling out of the terminal clamping groove.
[0007] In one embodiment of the present invention, the bottom of the terminal clamp groove is recessed with a slot, and the dovetail extends into the slot.
[0008] In one embodiment of this utility model, at least two leads are held and electrically connected by the same lead connection groove.
[0009] In one embodiment of the present invention, a sheet-like elastic brush arm is further included, one end of which is fitted with the terminal clamping groove and forms a conductive connection with the terminal.
[0010] In one embodiment of the present invention, one of the terminal and the elastic brush arm is provided with a through hole, and the other is provided with a protrusion that extends into the through hole.
[0011] In one embodiment of this utility model, a capacitor is also included. One lead of the capacitor is installed in the lead groove and the outer insulating layer is broken by the lead connection groove to establish a conductive connection. The other lead of the capacitor is clamped between the outer side of the insulating body and the inner side of the housing to establish a conductive connection with the housing.
[0012] In one embodiment of this utility model, the main body is plate-shaped and includes a bent portion; the lead wire connection groove includes a first lead wire connection groove and a second lead wire connection groove located on both sides of the bent portion; the insulating outer layer of the lead wire is destroyed by the first lead wire connection groove and the second lead wire connection groove respectively to establish a conductive connection.
[0013] In a second aspect, this utility model provides a household appliance equipped with the motor provided in the first aspect of this utility model, wherein the motor drives the working parts of the household appliance.
[0014] A third aspect of this utility model provides an electric tool equipped with a motor provided in the first aspect of this utility model, wherein the motor drives the working parts of the electric tool.
[0015] By implementing this utility model, the terminals can be plugged into the insulating body of the end cap to establish a conductive connection with the corresponding leads, thus improving assembly efficiency. Attached Figure Description
[0016] To further illustrate the specific technical details of this case, please refer to the accompanying drawings, in which:
[0017] Figure 1 A schematic diagram of a motor provided in an embodiment of the present invention;
[0018] Figure 2 and Figure 3 yes Figure 1 The diagram shows the end cap used in the motor from different viewing angles.
[0019] Figure 4 yes Figure 2 An exploded view of the end cap shown.
[0020] Figure 5 yes Figure 4 A partial enlarged view of the end cap shown;
[0021] Figure 6 yes Figure 2 A plan view of the end cap;
[0022] Figure 7 and Figure 8 yes Figure 2 The diagram shows the terminals used in the end cap from different viewing angles.
[0023] Figure 9 yes Figure 2 A schematic diagram of the brush arm and brush used in the end cap is shown. Detailed Implementation
[0024] The technical solutions in the embodiments of this utility model will now be described with reference to the accompanying drawings.
[0025] refer to Figure 1 In one embodiment of this utility model, the provided motor 100 includes a stator and a rotor rotatably mounted to the stator. The stator includes a housing 11 and an end cover 20 mounted to the housing 11. The end cover 20 is fitted with cables 21 and 22 for connection to an external source, such as an external power source. The rotor is housed within the housing 11, and the rotor shaft 71 extends from one end of the housing 11 for external driving.
[0026] In this embodiment, a reinforcing ring 13 is also fitted around the outer periphery of the housing 11. The reinforcing ring 13 is formed by bending and rolling a sheet. The end cap 20 is generally housed within the open end of the housing 11, and some connecting portions 12 at the end of the housing 11 are bent inward to prevent the end cap 20 from falling off.
[0027] refer to Figure 2 The end cap 20 includes an insulating body 25, an end cap plate 29, and terminals 31, 51, etc., which are mounted to the insulating body 25. The insulating body 25 is installed inside the opening of the housing 11, and the end cap plate 29 is located outside the insulating body 25. Preferably, the end cap plate 29 is a conductive metal plate and establishes a conductive connection with the housing 11.
[0028] refer to Figures 3 to 6The insulating body 25 is provided with a lead groove 26 and a terminal clamping groove 28. The lead groove 26 is used to install a lead, such as the lead 24 of cable 22. More specifically, the insulating body 25 is provided with a lead groove 26 and a first groove wall 26a, a second groove wall 26b, and a first groove bottom 27a and 27b defining the lead groove 26. The lead 24 is installed between the first groove wall 26a and the second groove wall 26b and supported by the first groove bottom 27a and 27b. Understandably, the insulating body 25 may also be provided with more lead grooves to install other leads, such as the lead 23 of cable 21; the insulating body 25 may also be provided with more terminal clamping grooves to install other terminals, such as terminals 31 and 51.
[0029] The insulating body 25 also includes a receiving groove 27, which extends to both sides of the lead wire 24 and the bottom of the receiving groove 27 is deeper than the first groove bottoms 27a and 27b. In this embodiment, the receiving groove 27 includes a first receiving groove 27a and a second receiving groove 27b. The first receiving groove 27a extends to both sides of the lead wire 24, and the second receiving groove 27b also extends to both sides of the lead wire 24. In this specification and claims, "the receiving groove 27 extends to both sides of the lead wire 24" means that the receiving groove 27 includes at least two parts, which are respectively located on both sides of the lead wire 24. These two parts may be connected or separated. The function of the receiving groove 27 is to accommodate the clamping arm of the lead wire connection groove 56 of the terminal 51, which will be described in detail below.
[0030] The main body 52 of terminal 51 is stably mounted to terminal clamping groove 28. Terminal 51 is provided with lead wire connection groove 56 and a first clamping arm, a second clamping arm, and a second groove bottom between the lead wire connection groove 56. In this embodiment, lead wire connection groove 56 includes a first lead wire connection groove 56a and a second lead wire connection groove 56b, and a first clamping arm 57a, a second clamping arm 57b, and a second groove bottom between the first lead wire connection groove 56a, and a first clamping arm 57c, a second clamping arm 57d, and a second groove bottom between the second lead wire connection groove 56b. The opening end of the first lead connection groove 56a faces the bottom of the first receiving groove 27a, and the size of the first lead connection groove 56a is smaller than the outer diameter of the lead wire 24. When the first clamping arm 57a and the second clamping arm 57b are respectively inserted into the first receiving groove 27a on both sides of the lead wire 24, the lead wire 24 is pushed towards the bottom of the first groove 27a and 27b by the first clamping arm 57a and the second clamping arm 57b. At least one of the first clamping arm 57a and the second clamping arm 57b destroys the insulating outer layer of the lead wire 24, thereby establishing a conductive connection with the lead wire 24. Similarly, the opening end of the second lead connection groove 56b faces the bottom of the second receiving groove 27b, and the size of the second lead connection groove 56b is smaller than the outer diameter of the lead 24. When the first clamping arm 57c and the second clamping arm 57d are respectively inserted into the second receiving grooves 27b on both sides of the lead 24, the lead 24 is pushed towards the bottom of the first groove 27a and 27b by the first clamping arm 57c and the second clamping arm 57d. At least one of the first clamping arm 57c and the second clamping arm 57d destroys the insulating outer layer of the lead 24, thereby establishing a conductive connection with the lead.
[0031] In this embodiment, the terminal 51 is provided with a barb structure 55 to prevent the terminal 51 from falling out of the terminal clamping groove 28. The terminal 51 is provided with a dovetail portion 54 to prevent the terminal 51 from falling out of the terminal clamping groove 28. A retaining groove 29 is recessed at the bottom of the terminal clamping groove 28, and the dovetail portion 54 extends into the retaining groove 29.
[0032] In this embodiment, the motor also includes capacitors 46 and 66. One lead 67 of capacitor 66 is installed into lead slot 26 and its outer insulating layer is broken by lead connection slot 56 to establish a conductive connection; the other lead 68 of capacitor 66 is clamped between the outside of insulating body 25 and the inside of housing 11, thereby establishing a conductive connection with housing 11. Understandably, after the motor 100 is installed, its housing 11 can be considered grounded; therefore, capacitor 66 is grounded through lead 68. In this embodiment, leads 24 and 67 are clamped and conductively connected by the same lead connection slot 56.
[0033] Understandably, as needed, fewer or more leads can be held and electrically connected by the same lead connection slot 56.
[0034] The connection method of capacitor 46 is similar to that of capacitor 66. One pin is electrically connected to terminal 31, and the other pin is grounded through housing 11. Terminal 31 is electrically connected to lead 23 of cable 21. The structure and installation method of terminal 31 are similar to those of terminal 51, and will not be described again.
[0035] refer to Figures 6 to 9 The motor 100 also includes a sheet-like elastic brush arm 61. One end of the elastic brush arm 61 is fitted with a terminal clamping groove 28 and forms a conductive connection with the terminal 51. The other end of the elastic brush arm 61 is fitted with a brush 64, which is used to conductively connect with the rotor's commutator (not shown in the figure) to supply power to the rotor windings. One of the terminal 51 and the elastic brush arm 61 is provided with a through hole 63, and the other is provided with a protrusion 53 that extends into the through hole 63.
[0036] In this embodiment, the main body 52 is plate-shaped and includes a bent portion; the lead wire connection groove 56 includes a first lead wire connection groove 56a and a second lead wire connection groove 56b located on both sides of the bent portion; the insulating outer layer of the lead wire is broken by the first lead wire connection groove 56a and the second lead wire connection groove 56b respectively, thereby establishing conductive connections.
[0037] Understandably, refer to Figure 3 The motor 100 also includes a sheet-like elastic brush arm 41. One end of the elastic brush arm 41 is fitted with a corresponding terminal clamp and forms a conductive connection with the terminal 31. The other end of the elastic brush arm 41 is fitted with a brush 44, which is used to conductively connect with the rotor's commutator (not shown in the figure) to supply power to the rotor windings. The brushes 44 and 64 are symmetrically arranged around the rotor's rotation center.
[0038] Motor 100 is particularly suitable for driving working parts and can be used in, but is not limited to, household appliances and power tools.
[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. An electric motor comprising a stator and a rotor rotatably mounted to the stator, the stator comprising a housing (11) and an end cap (20) mounted to the housing (11), characterized in that, The end cap (20) includes: An insulating body (25) is provided with a lead groove (26) and a first groove wall (26a), a second groove wall (26b) and a first groove bottom defining the lead groove (26), the first groove bottom being used to support the lead; the insulating body (25) also includes a receiving groove (27) extending to both sides of the lead and the bottom of the receiving groove (27) being deeper than the first groove bottom; the insulating body (25) also includes a terminal clamping groove (28); Terminal (51), the main body (52) of the terminal (51) is stably installed in the terminal clamping groove (28), the terminal (51) is provided with a lead wire connection groove (56) and a first clamping arm, a second clamping arm and a second groove bottom that define the lead wire connection groove (56); the opening end of the lead wire connection groove (56) faces the bottom of the receiving groove (27) and the size of the lead wire connection groove (56) is smaller than the outer diameter of the lead wire, so that when the first clamping arm and the second clamping arm are respectively inserted into the receiving grooves (27) on both sides of the lead wire, the lead wire is pushed to the bottom of the first groove by the first clamping arm and the second clamping arm together, and at least one of the first clamping arm and the second clamping arm destroys the insulating outer layer of the lead wire to establish a conductive connection with the lead wire.
2. The electric machine of claim 1, wherein, The terminal (51) is provided with a dovetail (54) and / or a barb structure (55) to prevent the terminal (51) from falling out of the terminal clamping groove (28).
3. The electric machine of claim 2, wherein, The bottom of the terminal clamping groove (28) is recessed with a slot (29), and the dovetail (54) extends into the slot (29).
4. The electric machine of claim 1, wherein, At least two leads are held and electrically connected by the same lead connection slot (56).
5. The electric machine of claim 1, wherein, It also includes a sheet-like elastic brush arm (61), one end of which is fitted with the terminal clamp (28) and forms a conductive connection with the terminal (51).
6. The electric machine of claim 5, wherein, One of the terminal (51) and the elastic brush arm (61) is provided with a through hole (63), and the other is provided with a protrusion (53) that extends into the through hole (63).
7. The electric machine of claim 1, wherein, It also includes a capacitor (66), one lead (67) of which is installed in the lead groove (26) and the outer insulating layer is broken by the lead connection groove (56) to establish a conductive connection; the other lead (68) of the capacitor (66) is clamped between the outside of the insulating body (25) and the inside of the housing (11) to establish a conductive connection with the housing (11).
8. The electric machine of claim 1, wherein, The main body (52) is plate-shaped and includes a bent portion; the lead wire connection groove (56) includes a first lead wire connection groove (56a) and a second lead wire connection groove (56b) located on both sides of the bent portion; the insulating outer layer of the lead wire is destroyed by the first lead wire connection groove (56a) and the second lead wire connection groove (56b) respectively to establish conductive connections.
9. A domestic appliance characterized in that, The motor according to any one of claims 1 to 8 drives the working parts of the household appliance.
10. An electric power tool characterized by comprising: The electric motor of any one of claims 1 to 8, the electric motor driving a working component of the power tool.