CN115642745A

CN115642745A - Electric machine

Info

Publication number: CN115642745A
Application number: CN202211413046.7A
Authority: CN
Inventors: 伍光祥; 林泳君; 漆凌君; 陈彬
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-01-24

Abstract

The present invention provides a motor, comprising: the stator core is integrally molded with a casing, a containing cavity is formed in the first end of the casing, the wire clamp, the power line and the conductor are partially molded in the casing respectively, a wire outlet hole enabling the power line to be led out is formed in the wire clamp, the circuit board is arranged in the containing cavity, the power line is electrically connected with the circuit board, the first end of the conductor is located in the containing cavity and electrically connected with the circuit board, and the second end of the conductor is electrically connected with the stator winding. According to the invention, the plastic package stator assembly is formed by integrally injection molding the stator core, part of the wire outgoing clamp and part of the power line, so that the periphery of the wire outgoing clamp is wrapped by BMC to form a sealing structure, and the wire outgoing position of the motor is sealed and waterproof. Meanwhile, the circuit board is not injected into the casing, but is installed in a containing cavity reserved in the casing, so that the problems that the circuit board and the power line are injected into the casing together, the circuit board is easily damaged unrepairable in the injection process, and the production reject ratio is high are solved.

Description

Electric machine

Technical Field

The invention belongs to the technical field of driving devices, and particularly relates to a motor.

Background

The traditional plastic package direct current motor with a PCB assembly, namely a built-in driving direct current motor, generally has two structures: 1. and the PCB assembly and the power line component are all welded outside the injection molding stator assembly, the power line is led out from a wire outlet of the stator through a wire outlet clamp, and then the end cover is pressed and fixed. The shortcoming of the structure is that the outlet cannot be well waterproof, and when the motor is applied to an environment with high waterproof requirements, the after-sale failure rate of the motor is high. At this moment, manufacturers usually carry out secondary waterproof treatment on the wire outlet, for example, glass cement is used for making up the defects of the structure, generally, the glue cannot be rapidly solidified and shaped, and needs to be air-dried for waiting, so that the production difficulty and the production period are undoubtedly increased, and the field management is not convenient. 2. The PCB assembly and the power line assembly are fixed on the motor, and are plastically packaged inside the injection molding stator assembly through BMC (bulk molding compound), so that the waterproof problem is solved well, but as more components are arranged on the PCB assembly, the damage which cannot be repaired is easily caused in the high-temperature high-pressure injection molding process, and the reject ratio of the injection molding process is high.

Disclosure of Invention

Therefore, the invention provides a motor, which can overcome the defect that the waterproof effect of the motor is poor because the PCB assembly and the power line component are all welded outside the injection molding stator assembly in the existing plastic packaging direct current motor, and the PCB assembly and the power line component are integrally plastic-packaged inside the injection molding stator assembly, so that the defect of high production reject ratio is overcome although the waterproof problem is solved.

In order to solve the above problems, the present invention provides a motor, including a stator core, a stator winding wound on the stator core, a casing integrally molded outside the stator core, a housing cavity formed at a first end of the casing, a wire clip, a circuit board, a power cord, and a conductor, wherein the wire clip, the power cord, and the conductor are partially molded in the casing, the wire clip is formed with a wire hole leading to an outside of the casing, the power cord is led out from the wire hole, the circuit board is disposed in the housing cavity, one end of the power cord in the casing is electrically connected to the circuit board, a first end of the conductor is in the housing cavity and is electrically connected to the circuit board, and a second end of the conductor is electrically connected to the stator winding.

In some embodiments, the clip is formed by splicing a first portion and a second portion, and the first portion and the second portion are spliced to form the outlet hole.

In some embodiments, the electronic device further comprises a power line connector pin, wherein the power line connector pin is also partially injected into the housing, a first end of the power line connector pin is located in the accommodating cavity and electrically connected with the circuit board, and a second end of the power line connector pin is electrically connected with the power line.

In some embodiments, the circuit board is provided with a first pad hole, and the first end of the power line connector pin is soldered in the first pad hole.

In some embodiments, a second pad hole is further disposed on the circuit board, and the first end of the conductor is soldered in the second pad hole.

In some embodiments, the housing further comprises a front cover integrally injection molded to the second end of the housing.

In some embodiments, the portable electronic device further comprises a rear end cover, the housing is internally provided with an integrally formed circular truncated cone, the circular truncated cone is close to the first end of the housing, the rear end cover is detachably connected to the first end of the housing, and the accommodating cavity is formed between the rear end cover and the circular truncated cone.

In some embodiments, the housing further comprises a rear end cap and a protective cover, the rear end cap is integrally molded in the housing and is close to the first end of the housing, the protective cover is assembled at the first end of the housing, and the accommodating cavity is formed between the protective cover and the rear end cap.

The invention provides a motor, wherein a stator core, part of a wire outlet clamp and part of a power line are integrally injected and molded into a plastic package stator assembly through BMC (bulk molding compound), so that the periphery of the wire outlet clamp is wrapped by the BMC to form a sealing structure, and the wire outlet position of the motor is sealed and waterproof. Meanwhile, the circuit board is not injected into the shell, but is installed in a reserved accommodating cavity of the shell, so that the problems that the circuit board, the wire outgoing clamp and the power line are injected into the shell together, the circuit board is easily damaged unrepairably in the high-temperature and high-pressure injection process, and the production reject ratio is high are solved.

Drawings

Fig. 1 is a schematic structural view of a motor according to a first embodiment of the present invention, in which no circuit board is installed;

fig. 2 is a schematic structural view of a motor according to a first embodiment of the present invention, in which a circuit board is mounted in a housing;

fig. 3 is a schematic structural view of a motor according to a first embodiment of the present invention, in which a rear end cover is mounted on a housing;

fig. 4 is a schematic structural diagram of a motor of a second embodiment of the present invention, in which no circuit board is installed;

fig. 5 is a schematic structural view of a motor according to a second embodiment of the present invention, in which a circuit board is mounted in a housing;

fig. 6 is a schematic structural view of a motor according to a second embodiment of the present invention, in which a protective cover is mounted on a housing.

The reference numbers are given as:

1. a housing; 2. a wire outlet clip; 3. a circuit board; 4. a power line; 5. an accommodating chamber; 6. a power line connector pin; 7. a conductor; 8. a front end cover; 9. a rear end cap; 10. a rotor assembly; 11. a shield.

Detailed Description

Referring to fig. 1 to 6 in combination, according to an embodiment of the present invention, there is provided a motor including: stator core, it is equipped with stator winding around it, a serial communication port, stator core's the outside an organic whole casing 1 of having moulded plastics, casing 1's first end integrated into one piece has and holds chamber 5, still include terminal clamp 2, circuit board 3, power cord 4 and conductor 7, terminal clamp 2, power cord 4 and conductor 7 are respectively by the part mould plastics in casing 1, the structure has the wire hole that leads to casing 1 outside on the terminal clamp 2, power cord 4 is drawn forth by the wire hole, circuit board 3 sets up and is holding in chamber 5, the one end and the 3 electric connection of circuit board that power cord 4 is in casing 1, conductor 7's first end is in holding in the chamber 5 and with 3 electric connection of circuit board, conductor 7's second end and stator winding electric connection. In the technical scheme, the stator core, part of the wire outgoing clamp 2 and part of the power line 4 are integrally molded by BMC to form the plastic package stator assembly, so that the periphery of the wire outgoing clamp 2 is wrapped by the BMC to form a sealing structure, and the wire outgoing position of the motor is sealed and waterproof. Wherein, the position of the outlet clamp 2 on the shell 1 is the outlet position of the motor. Meanwhile, the circuit board 3 is not injected into the casing 1, but is installed in a reserved accommodating cavity 5 of the casing 1, so that the problems that the circuit board 3, the wire outgoing clamp 2 and the power line 4 are injected into the casing 1 together, the circuit board 3 is easily damaged irreparably in the high-temperature and high-pressure injection process, and the production reject ratio is high are solved.

Specifically, the wire clip 2 is formed by splicing a first part and a second part, and a wire hole is formed after the first part and the second part are spliced. The wire outlet clip 2 is not an integral structure, but is formed by splicing an upper part, a lower part or a left part and a right part, wherein a first wire outlet groove is formed on the first part, a second wire outlet groove is formed on the second part, and after the first part and the second part are spliced, the first wire outlet groove and the second wire outlet groove are combined to form a complete wire outlet hole. The wire outlet clamp 2 adopts a split structure, so that the threading and leading-out of the power wire 4 are facilitated. On the other hand, the outlet clamp 2 can be made of nylon 66 material, has certain deformability after being stressed, and can compress the outlet clamp 2 after actual die assembly and injection molding, so that a wire outlet formed by combining the first outlet groove and the second outlet groove is reduced, and the insulating outer skin of the power wire 4 is made of soft material, so that the original gap between the power wire 4 and the wire outlet is filled, and a better waterproof effect is achieved.

Referring to fig. 1 and 4 together, the electronic device further includes a power line connection pin 6, the power line connection pin 6 is also partially injected into the housing 1, a first end of the power line connection pin 6 is located in the accommodating cavity 5 and electrically connected to the circuit board 3, and a second end of the power line connection pin 6 is electrically connected to the power line 4. The arrangement of the power wire connection pin 6 makes the electrical connection between the power wire 4 and the circuit board 3 more convenient. Meanwhile, the power line wiring pin 6 is partially injected into the casing 1, so that the power line wiring pin 6 can be omitted from being fixed independently, and the overall structure of the motor is more stable.

As a specific implementation manner, a first pad hole is formed in the circuit board 3, and the first end of the power line connection pin 6 is soldered in the first pad hole, so that the connection between the power line connection pin 6 and the circuit board 3 is firmer.

In this embodiment, the conductor 7 is a winding pin, the circuit board 3 is further provided with a second pad hole, and the first end of the winding pin is welded in the second pad hole, so that the winding pin and the circuit board 3 are connected more firmly.

Referring to fig. 1 in combination, the motor further includes a front end cap 8 and a rear end cap 9. As a first embodiment, the front cover 8 is integrally injection-molded at the second end of the housing 1, so that the structural strength of the formed motor is higher, and the coaxiality of the front cover 8 and the housing 1 is better. The machine shell 1 is internally provided with an integrally formed circular truncated cone which is close to the first end of the machine shell 1, the rear end cover 9 is detachably connected to the first end of the machine shell 1, and an accommodating cavity 5 is formed between the rear end cover 9 and the circular truncated cone.

As shown in fig. 4 to 6, the motor further includes a protective cover 11. As a second embodiment, the rear end cover 9 is integrally molded in the casing 1, and the rear end cover 9 is close to the first end of the casing 1, the protective cover 12 is assembled at the first end of the casing 1, and the accommodating cavity 5 is formed between the protective cover 12 and the rear end cover 9. The rear end cover 9 and the machine shell 1 are integrally molded, so that the structural strength of the formed motor is higher, and the coaxiality of the rear end cover 9 and the machine shell 1 is better. The protective cover 12 is used to protect the circuit board 3.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a motor, includes stator core, and the winding is equipped with stator winding on it, its characterized in that, stator core's the outside an organic whole casing (1) of having moulded plastics, the first end of casing (1) has and holds chamber (5), still includes wire clamp (2), circuit board (3), power cord (4) and conductor (7), wire clamp (2), power cord (4) and conductor (7) are partly moulded plastics respectively in casing (1), be constructed on wire clamp (2) and access to the outside wire hole of casing (1), power cord (4) by the wire hole is drawn forth, circuit board (3) set up hold in chamber (5), power cord (4) are in one end in casing (1) with circuit board (3) electric connection, the first end of conductor (7) be in hold in chamber (5) and with circuit board (3) electric connection, the second end of conductor (7) with stator winding electric connection.

2. The electric machine according to claim 1, characterized in that the outlet clip (2) is formed by a first part and a second part which are spliced together to form the outlet opening.

3. The machine according to claim 1, further comprising a power supply line connector pin (6), said power supply line connector pin (6) also being partially injected into said casing (1), a first end of said power supply line connector pin (6) being located in said housing cavity (5) and electrically connected to said circuit board (3), a second end of said power supply line connector pin (6) being electrically connected to said power supply line (4).

4. A machine as claimed in claim 3, characterized in that the circuit board (3) is provided with a first pad hole in which the first end of the power supply line connector pin (6) is soldered.

5. An electric machine according to claim 1, characterized in that the circuit board (3) is further provided with a second pad hole, in which the first end of the conductor (7) is soldered.

6. The machine according to claim 1, further comprising a front end cap (8), the front end cap (8) being integrally injection molded to the second end of the machine housing (1).

7. The electric machine according to claim 1, further comprising a rear end cap (9), wherein the housing (1) has an integrally formed circular truncated cone therein, the circular truncated cone is close to the first end of the housing (1), the rear end cap (9) is detachably connected to the first end of the housing (1), and the accommodating cavity (5) is formed between the rear end cap (9) and the circular truncated cone.

8. The machine according to claim 1, further comprising a rear end cap (9) and a protective cover (11), wherein the rear end cap (9) is integrally injection-molded in the machine housing (1), the rear end cap (9) is close to the first end of the machine housing (1), the protective cover (12) is assembled at the first end of the machine housing (1), and the receiving cavity (5) is formed between the protective cover (12) and the rear end cap (9).