CN109167457A

CN109167457A - End cover for motor and washing machine with same

Info

Publication number: CN109167457A
Application number: CN201811206660.XA
Authority: CN
Inventors: 吕凯; 徐跃峰; 马星宏; 漆凌君; 康宁
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2019-01-08
Anticipated expiration: 2038-10-17
Also published as: CN109167457B

Abstract

The invention discloses an end cover for a motor, which comprises a sheet metal bracket and a plastic-encapsulated BMC casing. The plastic-encapsulated BMC casing includes a casing bottom and a bearing chamber. The bearing chamber is directly injection-molded by BMC material. A plurality of through holes are arranged on the bracket, the sheet metal bracket is injection-molded between the bottom of the casing and the bearing chamber, and the plastic sealing compound is connected back and forth through the through holes. The invention combines the advantages of the sheet metal end cap and the plastic sealing end cap, the fastening part of the end cap is a sheet metal bracket, which improves the assembly stability and reliability, the bearing chamber is made of BMC injection molding, and the precision of the mold ensures the end cap bearing during plastic sealing. The concentricity of the chamber can reduce the vibration when the rotor rotates and improve the noise; the end cover and the stator shell are fastened by riveting, so as to avoid the crack caused by directly pressing the end cover into the stator, and the rivet fastening operation is simple and the production efficiency is high. Save labor costs.

Description

A kind of end cover for motor and the washing machine with it

Technical field

The present invention relates to a kind of end cover for motor, in particular to a kind of plastic packaging end cover for motor of washing machine, connection type and With its washing machine.

Background technique

Metal plate end cap is widely used in existing plastic packaging motor for washer, and metal plate end cap and the connection type of plastic packaging shell have two Kind: 1, metal plate end cap be equipped with mounting hole, is connect by beating screw mode with BMC shell；2, plastic packaging motor ABB is similar to cover, It is pressed directly into BMC shell.

The Chinese patent of Publication No. CN204858764U discloses a kind of plastic packaging motor, it includes injection moulded stator, and first Red steel cardboard, the second red steel cardboard, shaft, corrugated gasket, cage rotor, bearing and end cap；The injection moulded stator has top, Middle part and lower part；The injection moulded stator is fixed to form an entirety by BMC material encapsulating by field frame assembly, and the injection molding is fixed The top of son has wiring groove, and middle part protrusion is formed with multiple ears；The bearing is mounted on the first red steel cardboard In the end cap, the first red steel cardboard is installed between the bearing and the end cap；The second red steel cardboard installation In the injection moulded stator, the bearing is installed in the shaft, and the shaft is placed in the cage rotor, described It is placed toward the injection moulded stator direction on the head of shaft.

The Chinese patent of 107612181 A of Publication No. CN discloses a kind of Full-plastics sealed motor and preparation method thereof, including End cap and stator module, stator module setting open at one end, end cap are formed by BMC material one plastic packaging, stator module outer surface It is molded by BMC material and forms plastic packaging layer, end cap is open indentation so that end cap and stator module are interference fitted from stator module.

The prior art uses metal plate end cap, and motor oscillating is big, and noise is poor.Pressure bad conduct when end cap is pressed into BMC shell Cause plastic packaging material Cracking Failure.

Summary of the invention

The technical problem to be solved by the present invention is motor is big using the operating vibration of metal plate end cap, noise is poor；End cap is loosely Gu easy to fall off, assembly plastic packaging material cracking；Height rushes end cap long-term production, and mold core abrasion causes bearing chamber less than normal.

Technical scheme is as follows:

The present invention provides a kind of end cover for motor, including metal plate bracket and plastic packaging BMC shell, the plastic packaging BMC shell packet Housing bottom and bearing chamber are included, the bearing chamber is the direct injection molding of BMC material, is provided with several on the metal plate bracket Through-hole, between housing bottom and bearing chamber, plastic packaging material passes through connection before and after the through-hole for the metal plate bracket injection molding.

Further, the distance between the housing bottom and bearing chamber are identical as the thickness of metal plate bracket.

Further, the through-hole is curved kidney slot.

Further, the quantity of the through-hole is 3.

Further, the end cover for motor is fixed on stator body, and the periphery of the metal plate bracket is stretched out several A established angle is provided with fastener hole on the established angle, and position corresponding with established angle is provided with company on the stator body Fitting.

Further, the connector is rivet, and one end of the rivet is moulded in stator body, outside the other end Dew, when motor assembles, bearing chamber and field frame assembly precise match, rivet exposed junction pass through the fastener hole of metal plate bracket, and riveting is tight Gu.

Further, the quantity of the fastener hole is 3-4.

The present invention also provides a kind of washing machines, including above-mentioned end cover for motor.

By using above-mentioned technological means, the invention has the following beneficial effects:

The advantages of present invention incorporates metal plate end cap and plastic packaging end caps, end cap fastening part are metal plate bracket, promote assembly Stability, reliability；Bearing chamber uses BMC injection molding, and when plastic packaging guarantees the same of bearing with end cover room by the precision of mold Heart degree improves noise to reduce vibration when rotor rotation.The mobility of plastic packaging material not will lead to mold core abrasion, influence axis Hold indoor diameter.

Rivet one end is moulded in plastic packaging stator shell, the other end is exposed.When assembly, exposed junction passes through end cap metal plate branch Frame mounting hole is fastened by equipment riveting；It avoids directly causing to crack by end cap indentation stator, and tightening of rivet is easy to operate, High production efficiency saves labour cost.

Detailed description of the invention

Fig. 1 is end cap metal plate support schematic diagram.

Fig. 2 is end cap BMC plastic housing schematic diagram.

Fig. 3 is end cap schematic diagram.

Fig. 4 is field frame assembly schematic diagram.

Fig. 5 is assembling structure schematic diagram.

Marked in the figure: 11, through-hole；12, fastener hole；21, housing bottom；22, bearing chamber；31, stator body；32, rivet.

Specific embodiment

The present invention is described in further detail below in conjunction with the accompanying drawings.

For in the prior art, motor is big using the operating vibration of metal plate end cap, and noise is poor；End cap is insecure, easy to fall off, dress It cracks with plastic packaging material；Height rushes end cap long-term production, and mold core wears the problem for causing bearing chamber less than normal, and the present invention provides a kind of motor With end cap, including metal plate bracket and plastic packaging BMC shell, the plastic packaging BMC shell includes housing bottom 21 and bearing chamber 22, described Bearing chamber 22 is the direct injection molding of BMC material, several through-holes 11, the metal plate bracket note are provided on the metal plate bracket It moulds between housing bottom 21 and bearing chamber 22, plastic packaging material connects before and after passing through the through-hole 11.

The advantages of present invention incorporates metal plate end cap and plastic packaging end caps, end cap fastening part are metal plate bracket, promote assembly Stability, reliability；Bearing chamber uses BMC injection molding, and when plastic packaging guarantees the same of bearing with end cover room by the precision of mold Heart degree improves noise to reduce vibration when rotor rotation.The mobility of plastic packaging material not will lead to mold core abrasion, influence axis Hold indoor diameter.Rivet one end is moulded in plastic packaging stator shell by the present invention, and the other end is exposed.When assembly, exposed junction passes through end Lid metal plate rack mounting apertures, are fastened by equipment riveting；It avoids directly causing to crack by end cap indentation stator, and tightening of rivet is grasped Make simple, high production efficiency, saving labour cost.

End cover for motor of the invention can be applied in washing machine, be specifically used for assembling with field frame assembly.

Embodiment one

This implementation provides a kind of end cover for motor as shown in Figure 3, including metal plate bracket (as shown in Figure 1) and plastic packaging BMC Shell (as shown in Figure 2).Plastic packaging BMC shell includes housing bottom 21 and bearing chamber 22, and bearing chamber 22 is that BMC material is directly molded Molding.On metal plate bracket centered on central axis, circumferentially arranged have 3 curved waist through hole 11.It should be noted that this Invention does not have particular/special requirement to the number and shape of through-hole 11, and the present embodiment is only carried out by taking 3 curved waist through hole 11 as an example Explanation.Metal plate bracket is molded between housing bottom 21 and bearing chamber 22, and plastic packaging material connects before and after passing through the through-hole 11.

Preferably, in order to improve the compactedness and validity of assembly, between the housing bottom 21 and bearing chamber 22 away from From being set as identical as the thickness of metal plate bracket.

Optionally, the end cover for motor is fixed on stator body 31 as shown in Figure 4.At this point, metal plate bracket is outer It encloses and stretches out 3-4 established angle.As shown in Figure 1, being provided with fastener hole 12 on the established angle.It should be noted that the present invention couple The number and shape of established angle and fastener hole 12 do not have a particular/special requirement, the present embodiment only by taking 3 established angles and fastener hole as an example into Row explanation.Position corresponding with established angle is provided with connector on the stator body 31.It should be noted that the present invention couple The connection type of the type of connector does not have particular/special requirement, and the present embodiment is only illustrated by taking rivet 32 as an example.The one of rivet 32 End is moulded in stator body 31, and the other end is exposed, for fastening end cap.

When motor assembles, bearing chamber 22 and field frame assembly precise match, 32 exposed junction of rivet pass through the fastening of metal plate bracket Hole 12 is fastened using riveting press equipment riveting.Such connection type is secured, and end cap is not easy to loosen, and colleague avoids end cap pressure directly Entering stator causes to crack, and tightening of rivet is easy to operate, high production efficiency, saves labour cost.Such as Fig. 5 institute of mechanism after assembly Show.

Guarantee the cooperation of diameter and stator plastic housing outside bearing with end cover room when injection molding by the precision of mold, improves end cap stator Concentricity, thus reduce rotor rotation when vibration, improve noise.The mobility of plastic packaging material not will lead to mold core abrasion, shadow Ring bearing chamber internal diameter.

In conclusion metal plate bracket and BMC are molded integrally by the present invention by injection molding process, metal plate branch is provided with Three to four mounting holes, bearing chamber are injection molding, ensure that the concentricity of bearing chamber and rack mounting apertures, promote rotor assembly Concentricity；A kind of rivet one end is moulded in plastic packaging stator shell by the present invention, and the other end is exposed, and when assembly, exposed junction is passed through End cap metal plate rack mounting apertures, are fastened by equipment riveting.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention.It is all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims

1. An end cover for a motor, characterized in that it comprises a sheet metal bracket and a plastic-encapsulated BMC casing, the plastic-encapsulated BMC casing comprising a casing bottom (21) and a bearing chamber (22), the bearing chamber (22) For direct injection molding of BMC material, the sheet metal bracket is provided with several through holes (11), the sheet metal bracket is injected between the bottom of the shell (21) and the bearing chamber (22), and the plastic sealing material passes through the The through holes (11) are connected back and forth.

2 . The motor end cover according to claim 1 , wherein the distance between the housing bottom ( 21 ) and the bearing chamber ( 22 ) is the same as the thickness of the sheet metal bracket. 3 .

3 . The motor end cover according to claim 1 , wherein the through hole ( 11 ) is a curved waist-shaped hole. 4 .

4 . The motor end cover according to claim 1 , wherein the number of the through holes ( 11 ) is three. 5 .

5 . The motor end cover according to claim 1 , wherein the motor end cover is fixed on the stator body ( 31 ), and the periphery of the sheet metal bracket protrudes with several mounting angles, so that the Fastening holes (12) are provided on the mounting corners, and connecting pieces are provided on the stator body (31) at positions corresponding to the mounting corners.

6 . The motor end cover according to claim 5 , wherein the connector is a rivet ( 32 ), one end of the rivet ( 32 ) is injected into the stator body ( 31 ), and the other end is exposed. 7 . , When the motor is assembled, the bearing chamber (22) is precisely matched with the stator assembly, the exposed end of the rivet (32) passes through the fastening hole (12) of the sheet metal bracket, and is riveted and fastened.

7 . The motor end cover according to claim 5 or 6 , wherein the number of the fastening holes ( 12 ) is 3-4. 8 .

8. A washing machine, characterized in that it comprises the motor end cover according to any one of claims 1-7.