CN215849280U

CN215849280U - Rear cover of outer rotor of casing of brushless motor

Info

Publication number: CN215849280U
Application number: CN202121679016.1U
Authority: CN
Inventors: 熊新元
Original assignee: Shenzhen Yifeng Motor Parts Co ltd
Current assignee: Shenzhen Yifeng Motor Parts Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-02-18
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses a rear cover of a casing and an outer rotor of a brushless motor, which comprises: stamping forming's hardware and seal the plastic part of moulding plastics in hardware, the hardware has circular disk body and centers on the round edge at disk body edge, and the disk body center is formed with the axle sleeve hole, and the breach position that forms on the round edge is cut apart the round edge and is shown the multistage arcuation, the plastic part parcel covers in the upper and lower surface of disk body, and corresponds to mould plastics and fill in the breach position, is formed with the plastic outside along the round edge outer lane simultaneously, the internal surface in axle sleeve hole is not encapsulated. The utility model solves the problem of insecure viscose of the tooth mouth position and the problem of insufficient thrust of the pressing shaft, and the optimized product of the utility model can ensure the requirement of mass production, meet the service performance of the product and reduce the cost.

Description

Rear cover of outer rotor of casing of brushless motor

Technical Field

The utility model relates to an improved structure of a rear cover of an outer rotor of a brushless motor shell.

Background

Referring to fig. 1, an existing product is manufactured by machining an aluminum alloy part through a lathe and then machining a fan-shaped hole through CNC machining, and the like, and the product has low productivity and high cost, so that mass production cannot be realized, and market demands cannot be met.

Referring to fig. 2, another conventional product is an injection molding process using plastic material, which can meet the requirement of mass production, but when the rear cover is assembled with the hardware housing, the adhesive at the adhesive part of the plastic tooth mouth is not firm and does not meet the requirement of 200 kg thrust, and the press-in holding force between the central shaft hole and the shaft also does not meet the requirement of 200 kg thrust, which is a problem caused by the plastic material.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a rear cover of a casing and an outer rotor of a brushless motor.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a rear cover of a brushless motor casing and an outer rotor comprises: stamping forming's hardware and seal the plastic part of moulding plastics in hardware, the hardware has circular disk body and centers on the round limit at disk body edge, and the disk body center is formed with the axle sleeve hole, and the breach position that forms on the round limit is cut apart the round limit and is shown the multistage arcuation, the plastic part parcel covers in the upper and lower surface of disk body, and corresponds to mould plastics and fill in the breach position, is formed with the plastic outside along the round limit outer lane simultaneously, fills the plastic part in the breach position and constitutes a complete ring limit with the round limit jointly.

The inner surface of the shaft sleeve hole is not encapsulated.

The hardware is iron.

Four notches are evenly distributed.

And a gluing slot is formed in the outer circumferential wall of the round edge in a concave manner and is used for fixedly connecting the hardware casing and the round edge in a gluing manner.

The tray body is provided with various hole sites for positioning, and the inner surfaces of the hole sites are not encapsulated with rubber.

Symmetrical fan-shaped holes are formed in the disc body, and the inner surfaces of the fan-shaped holes can be coated with rubber.

After the hardware encapsulates the plastic part, the whole concentricity and perpendicularity are within 0.05mm and 0.05mm respectively.

Compared with the prior art, the utility model has the beneficial effects that:

in order to meet the requirements of batch production and mechanical performance, the product of the utility model is designed and developed, so that the problem that the tooth mouth position is not firmly glued and the problem that the thrust of the pressing shaft is not enough are solved. The optimized product of the utility model can ensure the requirement of mass production, meet the service performance of the product and reduce the cost.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced, wherein:

FIG. 1 is a diagram of a prior art product structure in the background art;

FIG. 2 is a diagram of another prior art product structure in the background art;

FIG. 3 is a schematic diagram of a hardware structure according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of a plastic part according to a preferred embodiment of the present invention;

fig. 5 is a schematic overall structure diagram of the preferred embodiment of the present invention.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the utility model, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the utility model.

Referring to fig. 3 to 5, a rear cover of an outer rotor of a brushless motor according to a preferred embodiment of the present invention mainly includes: stamping forming's hardware and encapsulation are moulded plastics in the plastic part of hardware, the hardware has circular shape disk body 11 and around the round edge 12 at disk body 11 edge, and disk body 11's center is formed with axle sleeve hole 13, is formed with a plurality of breach positions 14 on the round edge 12, and breach position 14 is equallyd divide into the multistage arcuation with round edge 12, the plastic part parcel covers in the upper and lower surface of disk body 11, and corresponds to mould plastics and fill in breach position 14, is formed with plastic outside 21 along round edge 12 outer lane simultaneously, but the internal surface of axle sleeve hole 13 can not the rubber coating, fills the plastic part in breach position 14 and constitutes a complete ring limit with round edge 12 jointly. When the shell of the brushless motor is assembled, the cylindrical hardware shell is in butt joint with the tooth mouth position of the rear cover, the inner surface of the hardware shell is directly connected with the outer circumferential surface of the circular edge 12, the combination mode of the hardware shell and the circular edge 12 is iron-bonded iron, the tooth mouth position bonding is firmer after optimization, and the requirement of 200 kilograms of thrust is met; similarly, the assembly pressing-in holding force of the shaft sleeve hole 13 and the central shaft is optimized to meet the requirement of 200 kg of thrust.

The 14 equal distribution in breach position has four, two effects, and first make the negative angle by the round edge of divided and can make things convenient for follow-up assembly, and second is more firm for the rubber coating.

The material of hardware is iron material, and stamping processing compares in lathe processing, CNC processing, and the cost is lower, and efficiency is higher.

The outer circumferential wall of the round edge 12 is concavely provided with a gluing slot 15 for fixedly connecting the hardware casing and the round edge 12.

The tray body 11 is provided with various positioning holes 16 for assembly, and the inner surfaces of the holes 16 cannot be encapsulated.

Symmetrical fan-shaped holes 17 are formed in the disc body 11, and the inner surfaces of the fan-shaped holes 17 can be coated with rubber.

After the hardware encapsulates the plastic part, the whole concentricity is within 0.05mm, the verticality is within 0.05mm, and the problems of deformation and burrs, glue-lacking air holes and the like cannot occur.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any indirect modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention by those skilled in the art are within the technical scope of the present invention.

Claims

1. A lid behind casing external rotor of brushless motor, its characterized in that includes: stamping forming's hardware and seal the plastic part of moulding plastics in hardware, the hardware has circular disk body and centers on the round limit at disk body edge, and the disk body center is formed with the axle sleeve hole, and the breach position that forms on the round limit is cut apart the round limit and is shown the multistage arcuation, the plastic part parcel covers in the upper and lower surface of disk body, and corresponds to mould plastics and fill in the breach position, is formed with the plastic outside along the round limit outer lane simultaneously.

2. The rear cover of the brushless motor casing and the outer rotor as claimed in claim 1, wherein the inner surface of the boss hole is not encapsulated.

3. The rear cover for the outer rotor and casing of the brushless motor as claimed in claim 1, wherein the hardware is iron.

4. The rear cover of brushless motor casing and outer rotor as claimed in claim 1, wherein there are four notches equally distributed.

5. The rear cover of the brushless motor for the machine shell and the outer rotor is characterized in that a gluing groove is formed in the outer circumferential wall of the round edge in a concave mode and used for fixedly connecting the hardware machine shell and the round edge in a gluing mode.

6. The rear cover of the brushless motor casing and the outer rotor as claimed in claim 1, wherein the disk body is provided with a hole for positioning, and the inner surface of the hole is not encapsulated.

7. The rear cover of the brushless motor casing and the outer rotor as claimed in claim 1, wherein symmetrical fan-shaped holes are formed in the disk body, and inner surfaces of the fan-shaped holes can be encapsulated.

8. The rear cover for the outer rotor and the housing of the brushless motor as claimed in claim 1, wherein the hardware is encapsulated by plastic, and the whole concentricity is within 0.05mm and the verticality is within 0.05 mm.