CN214255926U

CN214255926U - Electric machine

Info

Publication number: CN214255926U
Application number: CN202120019703.4U
Authority: CN
Inventors: 李建青
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-09-21
Anticipated expiration: 2031-01-05

Abstract

A motor comprises a rotor, a stator core, a first bobbin fixedly mounted at the top of the stator core and a lead wound on the stator core and the first bobbin, wherein the first bobbin comprises an annular substrate mounted on the top surface of the stator core, a plurality of winding parts extending inwards in the radial direction are uniformly distributed on the annular substrate in the circumferential direction, the end part of each winding part protrudes upwards to form a baffle, a retaining part protruding upwards is arranged on the upper surface of the annular substrate, the retaining part is arranged between two adjacent winding parts, and the lead comprises a lead-out wire connected with an external power line or an external PCB (printed circuit board); the motor is characterized in that a metal end plate is clamped on the holding portion, a hook-shaped wire binding portion which is restrained and connected with the outgoing line and has an upward opening is formed at the back of the metal end plate, an electric connection portion is formed at the upper portion of the metal end plate and is electrically connected with the power line or the wiring portion of the PCB, and the motor can be connected with an external power line or the PCB more conveniently.

Description

Electric machine

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of motors, in particular to motor that electric tool used.

[ background of the invention ]

In the prior art, a stator assembly of a motor is usually formed by winding an enameled wire on a stator core through a stator wire frame, drawing out the enameled wire and then removing paint, manually punching a copper strip on an external power line to form electric connection, or welding the enameled wire after punching the copper strip, so that workers at two stations are required to complete the process, the efficiency is very low, and the enameled wire at the joint of the copper strip is at a wire breakage risk after being bent.

In view of the above, there is a need for an improved motor to overcome the drawbacks of the prior art.

[ Utility model ] content

Not enough to prior art, the utility model aims to provide a motor, this motor can be more convenient be connected with external power cord or PCB board.

The utility model provides a technical scheme that prior art problem adopted is: the motor comprises a rotor, a stator core, a first bobbin fixedly arranged at the top of the stator core and a conducting wire wound on the stator core and the first bobbin, the first bobbin comprises an annular base plate arranged on the top surface of the stator core, a plurality of winding parts extending inwards along the radial direction are uniformly distributed on the annular base plate in the circumferential direction, the end part of the winding part is upwards protruded to form a baffle, the upper surface of the annular substrate is provided with a holding part which is upwards protruded, the holding part is arranged between two adjacent winding parts, the lead comprises a leading-out wire connected with an external power wire or an external PCB, the motor also comprises a metal end plate clamped on the holding part, a hook-shaped beam line part which is used for restraining and connecting the outgoing line and has an upward opening is formed at the back of the metal end plate, and the upper part of the metal end plate is provided with a wiring part which is electrically connected with the power line or the PCB.

Preferably, the wire connection portion is provided in a hook structure having a downward opening, and the power wire is welded to an inside of the hook structure.

Preferably, the inner diameter of the hook structure is adapted to the diameter of the power line, so that the power line generates a drawing force when passing through the inside of the hook structure.

Preferably, the wiring portion is provided as a plate-shaped structure, and the plate-shaped structure is soldered to the terminal of the PCB.

Preferably, the left side and the right side of the metal end plate are bent inwards to form buckle parts surrounding the holding parts, a welding space is formed between the two buckle parts, and the holding parts are two columnar bosses matched with the buckle parts.

Preferably, the motor is a three-phase brushless motor, the leads are arranged in a delta connection, and the two connected lead wires are welded in a hook shape of the harness portion.

Preferably, the motor is a three-phase brushless motor, the lead wires are arranged in a star connection, the head end of each phase of the lead wire is welded in the hook shape of the beam portion, and the tail end of each phase of the lead wire is electrically connected.

Preferably, the motor further includes a second bobbin fixedly mounted at the bottom of the stator core, the stator core extends radially inward to form a plurality of tooth members corresponding to the winding portions, and the wires are wound around the first bobbin, the tooth members and the second bobbin.

Preferably, the first bobbin further includes a plurality of positioning insertion grooves protruding downward from the bottom surface of the annular substrate, and the positioning insertion grooves are inserted into winding grooves formed by two adjacent tooth members.

Preferably, the shape of the second bobbin is the same as the shape and structure of the first bobbin.

Compared with the prior art, the utility model discloses following beneficial effect has: the lead is wound on the stator core and the first wire frame, the outgoing line of the lead is hooked in the hook of the bunching part, the bunching part and the outgoing line are welded through the electric welding machine, the high temperature generated on the metal end plate after the electric welding machine is electrified can scald the paint skin of the outgoing line, the hook-shaped bunching part is connected with the back of the metal end plate through the extrusion deformation of the electric welding machine, the lead and the metal end plate are in a conductive state together, the wiring part of the metal end plate is electrically connected with an external power supply line or a wiring end of a PCB plate to form stable electrical connection, the steps of manually depainting the enameled wire and connecting the enameled wire with the wiring end of the power supply line or the PCB plate are simplified, and the process is more time-saving and rapid.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a schematic perspective view of a motor according to an embodiment of the present invention;

FIG. 2 is an exploded view of the motor shown in FIG. 1;

FIG. 3 is a schematic view of a metal terminal connected to an external power line;

fig. 4 is a schematic view of a metal terminal connected to an external PCB board.

The meaning of the reference symbols in the figures:

100. motor 1, rotor 2, stator core 21, tooth member 22, winding groove 3, first bobbin 31, annular base plate 32, winding portion 33, baffle 34, holding portion 35, positioning slot 4, second bobbin 5, lead wire 51, lead wire 6, metal end plate 61, bundling portion 62, hook structure 63, plate structure 64, snap part 65, welding space 7, power cord

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and fig. 2, the motor 100 includes a rotor 1 and a stator core 2, wherein the stator core 2 has a plurality of tooth members 21 extending radially inward; the top of the stator core 2 is fixedly provided with a first bobbin 3, the first bobbin 3 is installed on an annular substrate 31 of the top surface of the stator core 2, a plurality of winding portions 32 extending inwards in the radial direction are uniformly distributed on the annular substrate 31 in the circumferential direction, the winding portions 32 correspond to the tooth members 21, a baffle 33 is formed at the end portions of the winding portions 32 in an upward protruding mode, retaining portions 34 protruding upwards are arranged on the upper surface of the annular substrate 31, the retaining portions 34 are arranged between the two adjacent winding portions 32, the first bobbin 3 further comprises a plurality of positioning slots 35 protruding downwards in the bottom surface of the annular substrate 31, and the positioning slots 35 are inserted into the two adjacent winding slots 22 formed by the tooth members 21.

The motor 100 further includes a second bobbin 4 fixedly mounted at the bottom of the stator core 2, the first bobbin 3 and the second bobbin 4 are made of an insulating material, in this embodiment, the second bobbin 4 has the same shape and structure as the first bobbin 3, the annular base plate of the second bobbin 4 is mounted at the bottom of the stator core 2, the same winding portion of the second bobbin 4 is disposed corresponding to the tooth member 21, the positioning slot of the second bobbin 4 is inserted between two adjacent tooth members 21, the tooth member 21, the winding portion 32 of the first bobbin 3 and the winding portion 32 of the second bobbin 4 are externally wound with wires 5, the wires 5 are received in the winding slot 22, the baffle 33 of the first bobbin 3 and the baffle 33 of the second bobbin 4 can effectively prevent the wires 5 from coming off the tooth member 21, while improving the insulation performance of the motor 100.

Of course, the second bobbin 4 may also be different from the first bobbin 3 in shape and structure, as long as the second bobbin 4 can cooperate with the first bobbin 3 to provide reliable support for winding the wires 5.

The motor 100 further comprises a metal end plate 6 clamped on the holding portion 34, preferably, the metal end plate 6 is a copper plate, the left and right sides of the metal end plate 6 are bent inwards to form a buckle part 64 encircling the holding portion 34, a welding space 65 is formed between the two buckle parts 64, and the holding portion 34 is provided with two columnar bosses matched with the buckle parts 64; the lead 5 includes an outgoing line 51 connected to an external power line 7 or an external PCB board, a hook-shaped bunching part 61 which is used for restricting and connecting the outgoing line 51 and has an upward opening is formed at the back of the metal end plate 6, when the lead wires 5 are arranged in a delta connection, two connected lead wires 51 are soldered in the hook shape of the wire binding portion 61, and the wire binding portion 61 can provide a certain support for the lead wires 51 of the lead wires 5, the wire harness portion 61 and the outgoing wire 51 are welded by an electric welding machine, the electric welding machine extends into the welding space 65 after being electrified, the paint skin of the outgoing line 51 is generated on the metal end plate 6 to be hot-broken at high temperature, so that the two connected leads 5 form electrical connection, the hook-shaped wire harness portion 61 is also connected to the back of the metal end plate 6 by being crushed and deformed by the electric welding machine, the lead 5 and the metal end plate 6 form a stable electrical connection and are in a conductive state together.

When the lead wires 5 are arranged in a star connection, the head end of each phase of the lead wire 51 is welded in the hook shape of the bunching part 61, the tail end of each phase of the lead wire 51 is electrically connected, the bunching part 61 can provide a certain support for the lead wire 51 of the lead wire 5, the bunching part 61 and the head end of the lead wire 51 can be welded by an electric welding machine, the electric welding machine is electrified and then extends into the welding space 65, the high temperature is generated on the metal end plate 6 to scald the paint skin of the lead wire 51, the hook-shaped bunching part 61 is also connected with the back of the metal end plate 6 through the extrusion deformation of the electric welding machine, the lead wire 5 and the metal end plate 6 form a stable electrical connection and are in a conductive state together, or the lead wire 51 can be directly welded in the hook shape of the bunching part 61 through soldering tin.

Referring to fig. 3, a wire connection portion is formed on the upper portion of the metal end plate 6, the wire connection portion is configured as a hook structure 62 with a downward opening, the hook structure 62 is used for connecting and fixing the power wire 7, the power wire 7 can be soldered inside the hook structure 62 by soldering, the hook structure 62 can be pressed to deform to fix the power wire 7 on the metal end plate 6 and form a stable electrical connection, the inner diameter of the hook structure 62 is adapted to the diameter of the power wire 7, so that a pulling force is generated when the power wire 7 passes through the inside of the hook structure 62, the operation is further facilitated, the lead wire 51 and the power wire 7 form a stable electrical connection by the metal end plate 6, and the steps of manually depainting the enameled wire and connecting the power wire 7 or the terminal of the PCB are simplified, and is more time-saving and quicker.

Referring to fig. 4, when the motor 100 is directly connected to the terminals of the PCB, the connection portion may also be a plate-shaped structure 63, and the plate-shaped structure 63 is used for soldering the terminals of the PCB.

The present invention is not limited to the above-described embodiments. One of ordinary skill in the art will readily recognize that there are numerous alternatives to the motor 100 of the present invention without departing from the spirit and scope of the present invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. The utility model provides a motor, includes rotor, stator core, fixed mounting in the first bobbin at stator core top and around locating stator core with wire on the first bobbin, first bobbin including install in the annular base plate of stator core top surface, annular base plate circumference equipartition has along the several wire winding portion of radial inside extension, the tip of wire winding portion is protruding upwards to stretch and is formed with the baffle, the upper surface of annular base plate is provided with the maintenance portion that upwards protrudes to stretch, the maintenance portion set up in two adjacent between the wire winding portion, the wire includes the lead-out wire of being connected with external power line or external PCB board, its characterized in that: the motor also comprises a metal end plate clamped on the holding part, a hook-shaped wire binding part which is used for restraining and connecting the outgoing line and has an upward opening is formed at the back of the metal end plate, and a wiring part which is electrically connected with the power line or the PCB is formed at the upper part of the metal end plate.

2. The electric machine of claim 1, wherein: the wiring portion is arranged to be of a hook-shaped structure with a downward opening, and the power line is welded inside the hook-shaped structure.

3. The electric machine of claim 2, wherein: the inner diameter of the hook-shaped structure is matched with the diameter of the power line, so that the power line generates drawing force when passing through the inside of the hook-shaped structure.

4. The electric machine of claim 1, wherein: the wiring portion is arranged to be of a plate type structure, and the plate type structure is welded to the wiring end of the PCB.

5. The electric machine of claim 1, wherein: the left side and the right side of the metal end plate are inwards bent to form buckle parts encircling the retaining parts, a welding space is formed between the two buckle parts, and the retaining parts are arranged into two cylindrical bosses matched with the buckle parts.

6. The electric machine of claim 5, wherein: the motor is a three-phase brushless motor, the leads are arranged in a triangular connection, and the two connected outgoing lines are welded in the hook shape of the beam line part.

7. The electric machine of claim 5, wherein: the motor is a three-phase brushless motor, the lead wires are arranged in a star connection mode, the head end of each phase of the outgoing wire is welded in the hook shape of the beam portion, and the tail end of each phase of the outgoing wire is electrically connected.

8. The electric machine according to any of claims 1-7, characterized in that: the motor also comprises a second wire frame fixedly arranged at the bottom of the stator core, the stator core extends inwards along the radial direction to form a plurality of tooth components corresponding to the winding part, and the wires are wound on the first wire frame, the tooth components and the second wire frame.

9. The electric machine of claim 8, wherein: the first bobbin further comprises a plurality of positioning slots which protrude downwards from the bottom surface of the annular substrate, and the positioning slots are inserted into winding slots formed by two adjacent tooth components.

10. The electric machine of claim 9, wherein: the shape and the structure of the second wire frame are the same as those of the first wire frame.