CN211481014U - Weight reduction type motor stator injection molding structure with insulation and support functions - Google Patents

Abstract

The utility model provides a subtract type motor stator injection structure with insulating and support function, the equipartition has a plurality of tooth's sockets and coil winding to inlay in the tooth's socket on stator core inner wall, and stator core and coil winding are solid as an organic whole through the shell of moulding plastics, and the shell of moulding plastics will stretch out stator core's coil winding both ends parcel inside it, the shell both ends of moulding plastics are equipped with the bearing mounting hole that is used for installing the bearing, locate stator core's rotor both ends and rotate through the bearing of installing in the bearing mounting hole and support in the shell of moulding plastics, and it has the insulating layer to mould plastics between stator core's tooth's socket inner wall and the coil winding. The utility model discloses in being applied to motor stator structure with the technique of moulding plastics, link firmly stator core and coil winding as an organic whole through the injection molding material to form the insulating layer between tooth's socket inner wall and coil winding, both can reduce motor weight, can improve motor power density again and guaranteed the insulation requirement, do not lose the supporting function of rotor moreover, mounting process is simple, has very big using value.

Description

Weight reduction type motor stator injection molding structure with insulation and support functions

Technical Field

The utility model belongs to the technical field of the brushless DC motor, concretely relates to subtract type motor stator injection structure with insulation and support function.

Background

Since the advent of dc brushless motors, it has gradually become the leading role in the motor market instead of brush motors, and at the same time it has met the needs of the motor market through continuous technological innovation. At present, the demand of the motor market for a small-sized and light-weight motor is continuously increased, in order to meet the market demand, the research direction of the dc brushless motor is also developed towards the small-sized and light-weight direction, the structure of the existing dc brushless motor is shown in fig. 1, and a motor stator consists of a stator core part and a shell part. The stator core part comprises a stator core 1 and a coil winding 2, an insulating layer 3 needs to be arranged between the coil winding 2 embedded on the inner wall of a slot of the stator core 1 and the inner wall of the slot of the stator core 1, and meanwhile, a shell of the existing direct current brushless motor is formed by assembling a shell 4, a front end cover 5, a screw 6 and a rear end cover 7.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the injection molding technology is applied to the motor stator structure, a stator core and a coil winding are fixedly connected into a whole through injection molding materials, an insulating layer for isolating the insulated stator core from the coil winding is formed between the inner wall of a tooth space of the stator core and the coil winding, a stator injection molding shell which can reduce the weight of a motor, improve the power density of the motor and ensure the insulation requirement is formed, the supporting function of a rotor is not lost, the structure is simple and novel, the mounting process is simplified, and the injection molding structure has great application value.

The utility model adopts the technical proposal that: weight reduction type motor stator injection structure with insulation and support function, mould the shell including stator core, coil winding and notes, the equipartition has a plurality of tooth's sockets and coil winding to inlay in the tooth's socket on the stator core inner wall, stator core and coil winding are solid as an organic whole through moulding plastics the shell, and mould plastics the shell and will stretch out stator core's coil winding both ends parcel inside it, it is equipped with the bearing mounting hole that is used for installing the bearing to mould plastics the shell both ends, locates the rotor both ends in the stator core and rotate through the bearing of installing in the bearing mounting hole and support in moulding plastics the shell, it has the insulating layer to mould plastics between stator core's tooth ' socket inner wall and the coil winding.

Furthermore, an insulating layer for insulating the stator core and the coil winding in an isolation manner is formed after the injection molding material filled between the inner wall of the tooth slot of the stator core and the coil winding is solidified, and the insulating layer and the injection molding shell are of an integrated structure.

Furthermore, the inner wall of the bearing mounting hole is provided with a positioning groove and a positioning step for positioning the bearing, and the positioning groove, the positioning step and the bearing mounting hole are all formed by one-time injection molding with the injection molding shell.

The utility model has the advantages compared with the prior art:

1. the technical scheme applies the injection molding technology to the motor stator structure, the stator core and the coil winding are fixedly connected into a whole through injection molding materials, and an insulating layer is formed between the inner wall of the tooth slot of the stator core and the coil winding, so that the weight of the motor can be reduced, the power density of the motor can be improved, the insulating requirement is ensured, and the mounting process is greatly simplified;

2. according to the technical scheme, the bearing mounting hole, the positioning groove and the positioning step which are used for positioning the bearing on the inner wall of the bearing mounting hole and the injection molding shell are formed in one-step injection molding mode, so that the processing procedure of the bearing mounting hole is simplified, the injection molding shell formed in an injection molding mode does not lose the supporting function of the rotor, and the mounting requirement of the direct-current brushless motor is met;

3. this technical scheme simple structure is novel, and the injection molding material is non-metallic material, and density is less than the metal, and under the same volume and the same power condition, compared with current stator structure, weight reduction 500g (accounting for about 25% of ordinary motor total weight), greatly reduced stator structure's weight does benefit to direct current brushless motor to small, light in weight's direction development, has very big using value.

Drawings

Fig. 1 is a schematic structural diagram of a stator of a conventional dc brushless motor;

fig. 2 is a schematic view of the injection structure of the stator of the brushless dc motor according to the present invention.

Detailed Description

An embodiment of the present invention will be described with reference to fig. 2, so that the technical solution will be described clearly and completely.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The weight-reduction motor stator injection molding structure with the insulation and support functions comprises a stator core 1, a coil winding 2 and an injection molding shell 9, wherein a plurality of tooth sockets are uniformly distributed on the inner wall of the stator core 1, the coil winding 2 is embedded in the tooth sockets, the stator core 1 and the coil winding 2 are fixedly connected into a whole through an injection molding shell 9, two ends of the coil winding 2 extending out of the stator core 1 are wrapped in the injection molding shell 9, two ends of the injection molding shell 9 are provided with bearing mounting holes 11 for mounting bearings 10, two ends of a rotor 8 arranged in the stator core 1 are rotatably supported in the injection molding shell 9 through the bearings 10 mounted in the bearing mounting holes 11, and an insulation layer 3 is injected between the inner wall of the tooth sockets of the stator core 1 and the coil winding 2; specifically, after being cured, the injection molding material filled between the inner wall of the tooth slot of the stator core 1 and the coil winding 2 forms an insulating layer 3 for insulating the stator core 1 and the coil winding 2, and the insulating layer 3 and the injection molding shell 9 are of an integrated structure; specifically, the inner wall of the bearing mounting hole 11 is provided with a positioning groove and a positioning step for positioning the bearing 10, and the positioning groove, the positioning step and the bearing mounting hole 11 are all formed by one-time injection molding with the injection molding shell 9.

Compared with the stator structure (see fig. 1) of the existing brushless DC motor, the injection molding body of the structure is integrated and firmly attached to the stator core 1, on one hand: the non-metal injection molding body replaces metal components such as a shell 4, a front end cover 5, a screw 6, a rear end cover 7 and the like of the existing common motor, so that the weight is reduced, and a structural supporting effect is achieved; on the other hand: the injection molding material is filled in the part between the inner wall of the tooth socket of the stator core 1 and the coil winding 2 to form an insulating layer 3, the non-metallic insulating layer 3 between the tooth socket of the existing direct current motor and the coil winding 2 is replaced, the functions of isolating and insulating the coil winding 2 and the inner wall of the tooth socket of the stator core 1 are achieved, and the effect of reinforcing and connecting the injection molding parts at two ends of the stator core 1 is achieved; the injection molding materials of the injection molding shell 9 and the insulating layer 3 which is integrated with the injection molding shell 9 are non-metal, the density is smaller than that of metal, and the weight of the injection molding shell and the insulating layer is reduced by about 500g (about 25% of the original weight of a common motor) compared with the weight of the stator structure of the existing direct current brushless motor under the conditions of the same volume and the same power, and the injection molding shell has a good effect.

The technical scheme applies the injection molding technology to a motor stator structure, the stator core 1 and the coil winding 2 are fixedly connected into a whole by injection molding materials, and an insulating layer 3 is formed between the inner wall of a tooth space of the stator core 1 and the coil winding 2, so that the weight of a motor can be reduced, the power density of the motor can be improved, the insulating requirement is ensured, the mounting process is greatly simplified, the positioning groove and the positioning step which are used for positioning the bearing 10 on the inner walls of the bearing mounting hole 11 and the bearing mounting hole 11 are formed by one-step injection molding with the injection molding shell 9, the processing procedure of the bearing mounting hole 11 is simplified, the injection molding shell 9 does not lose the supporting function of a rotor, the mounting requirement of a direct current motor is met, the structure is simple and novel, the injection molding materials are non-metal materials, the density is less than metal, and the weight is reduced by about 500g (about 25 percent of the original weight of the common motor) under the conditions, the weight of the stator structure is greatly reduced, the development of the brushless direct current motor in the direction of small volume and light weight is facilitated, and the brushless direct current motor has great application value.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims (3)

1. Subtract type motor stator injection structure with insulation and support function, its characterized in that: including stator core (1), coil winding (2) and the shell (9) of moulding plastics, the equipartition has a plurality of tooth's sockets and coil winding (2) to inlay in the tooth's socket on stator core (1) inner wall, stator core (1) and coil winding (2) link firmly as an organic wholely through moulding the mould shell (9), and mould plastics shell (9) and will stretch out coil winding (2) both ends parcel of stator core (1) inside it, it is equipped with bearing mounting hole (11) that are used for installing bearing (10) to mould shell (9) both ends, locates rotor (8) both ends in stator core (1) and rotate through bearing (10) of installing in bearing mounting hole (11) and support in moulding plastics shell (9), it has insulating layer (3) to mould plastics between the tooth's socket inner wall of stator core (1) and coil winding (2).

2. The weight-reduction motor stator injection structure with insulation and support functions as claimed in claim 1, wherein: the insulation layer (3) used for insulation of the stator core (1) and the coil winding (2) is formed after the injection molding material filled between the inner wall of the tooth slot of the stator core (1) and the coil winding (2) is solidified, and the insulation layer (3) and the injection molding shell (9) are of an integrated structure.

3. The weight-reduction type motor stator injection structure with insulation and support functions as claimed in claim 1 or 2, wherein: the bearing mounting hole (11) is provided with a positioning groove and a positioning step for positioning the bearing (10) on the inner wall, and the positioning groove, the positioning step and the bearing mounting hole (11) are all formed by one-time injection molding with the injection molding shell (9).

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