CN111926532A

CN111926532A - Drum for washing machine, manufacturing method thereof and washing machine with same

Info

Publication number: CN111926532A
Application number: CN201910392801.XA
Authority: CN
Inventors: 金胜秋; 蒋哲昊; 叶超; 李辰
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2020-11-13
Anticipated expiration: 2039-05-13
Also published as: DE102020205927A1; CN111926532B

Abstract

A drum for a washing machine includes a cylindrical sidewall and a rear cover coupled to a rear end of the sidewall, the rear cover including a bracket made of metal and a wall made of plastic, wherein the bracket includes a shaft portion at a center and a plurality of arm portions extending in a radial direction, the wall wrapping at least a portion of the bracket. The method for manufacturing a drum for a washing machine includes first forming a bracket of metal, wherein the bracket includes a shaft portion at a center and a plurality of arm portions extending in a radial direction, and then integrally forming a wall of plastic outside the bracket by in-mold injection, wherein the wall wraps at least a portion of the bracket. The invention also discloses a washing machine with the drum.

Description

Drum for washing machine, manufacturing method thereof and washing machine with same

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of household appliances, and relates to a washing machine, a roller thereof and a manufacturing method of a roller plate.

[ background of the invention ]

The drum of the washing machine generally includes a metal sidewall and a metal back cover coupled to a rear end of the sidewall. The metal back cover is formed integrally and has a portion recessed into the barrel for receiving a bracket mounted on the outside of the back cover. The support is provided with a shaft and is connected with a driving system, so that the driving system can drive the shaft to further drive the roller to rotate.

Because the rear cover is recessed into the barrel, limited space within the barrel is occupied. The support is connected to the concave part on the outer side of the rear cover, dead corners are cleaned due to the existence of the support and the rear cover in the using process, and the support is not easily washed by washing water, so that a large amount of dirt can be accumulated after long-term use, and secondary pollution is caused to clothes. In addition, the material cost and the process installation cost of the rear cover and the bracket are also high.

[ summary of the invention ]

It is an object of the present invention to ameliorate the disadvantages of the prior art.

The invention provides a drum for a washing machine, which comprises a cylindrical side wall and a rear cover connected to the rear end of the side wall, wherein the rear cover comprises a bracket made of metal and a wall made of plastic, the bracket comprises a shaft part positioned in the center and a plurality of arm parts extending in the radial direction, and the wall wraps at least one part of the bracket.

In one embodiment, the bracket includes an annular rim, and the arm portion is connected between the shaft portion and the rim.

In one embodiment, the edge of the bracket is provided with a plurality of screw holes, and screws penetrate through the side wall of the roller and are connected to the screw holes, so that the rear cover and the side wall are fixedly installed.

In one embodiment, the screw hole is provided at an outer end of the arm portion.

In one embodiment, the arm portion includes a rib projecting generally axially.

In one embodiment, the arm comprises a base substantially perpendicular to the rib.

In one embodiment, the support comprises an annular rim, the substrate being coplanar with the rim.

In one of the embodiments, the ribs face the inside of the drum.

In one embodiment, the side of the wall facing the outside of the drum is smooth.

In one embodiment, the wall and the bracket are integrally formed by in-mold injection molding.

The above embodiments may be combined with each other.

The present invention also provides a washing machine including the drum of the combination of the above various embodiments.

The present invention also provides a method of manufacturing a drum for a washing machine, comprising forming a bracket from metal, wherein the bracket comprises a central shaft portion and a plurality of radially extending arm portions, and integrally forming a wall made of plastic outside the bracket by in-mold injection, wherein the wall wraps at least a portion of the bracket, and a back cover comprising the wall and the bracket is attached to a pre-formed side wall.

The present invention also provides a washing machine including the drum manufactured according to the above manufacturing method.

Compared with the prior art, the rear cover occupies small space, and the space in the drum of the roller is increased. Because the back cover partially adopts plastics, the material cost is reduced. The wall wraps the support, and the two are formed into a whole through the technology, so that the installation procedures are reduced, and the structure is simpler. Also, the metal bracket is less susceptible to corrosion. The ribs on the arm not only play a role of reinforcement, but also can lift the clothes during the washing process. The side of the wall facing the outside of the roller is of a smooth structure, so that the residue of dirt is reduced, and the roller is more sanitary.

Hereinafter, specific embodiments of the present invention will be described by way of example with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a side elevational view of a washing machine;

FIG. 2 is a perspective view of a bracket of the drum back cover;

FIG. 2 is an overall perspective view of the drum back cover;

fig. 3 is a sectional view of the drum back cover in fig. 2.

[ detailed description ] embodiments

As shown in fig. 1, the washing machine 100 has a drum 10 located inside a cabinet 2. The drum 10 is driven in a rotational movement by the drive system 4. The drum 10 includes a cylindrical sidewall 11 and a rear cover 12 connected to a rear end of the sidewall.

As shown in fig. 2 and 3, the rear cover 12 includes a bracket 13 made of metal. Wherein the bracket 13 comprises a central shaft portion 14, a plurality of radially extending arm portions 15, and an annular rim 16 disposed around the outer edges of the arm portions 15. The arm portion 15 is connected between the shaft portion 14 and the frame 16. And arm 15 is integrally formed with rim 16. The roller 10 is connected to the drive system 4 via a shaft 14.

As shown in fig. 3 and 4, the rear cover 12 also has a wall 17 made of plastic. Wall 17 completely surrounds stent 13, or in some embodiments, a portion of stent 13, thereby forming an integral part of stent 13. The wall 17 comprises a first portion 17a covering the support 13 and a second portion 17b filling the gap between adjacent arms 15 and separating the space inside and outside the drum individually.

As shown in fig. 3 and 4, the arm portion 15 includes a base 151 substantially coplanar with the frame 16 and a rib 152 substantially perpendicular to the base 151. As shown in fig. 1, the ribs 152 protrude in a substantially axial direction facing the inside of the drum 10, so as to assist in lifting the laundry upward when the drum 10 rotates during the washing process, and to better accomplish lifting-beating of the laundry. The side of the wall 17 facing the outside of the drum is smooth so that dirt is not easily trapped.

The outer end of each arm 15 in the direction of extension is also provided with a threaded hole 18. Screws (not shown) are connected to the screw holes 18 through the drum side walls 11, thereby achieving the fixed mounting of the rear cover 12 to the side walls 11.

The drum 10 may be manufactured by: the holder 13 is first made of metal and then the wall 16 made of plastic is integrally formed outside the holder 13 by in-mold injection. Wherein the manufacturing process of the bracket 13 can be divided into first manufacturing the shaft portion 14. Shaft portion 14 is typically made of a stronger steel. The shaft portion is then placed in a grinder, and the arm portion 15 and the annular rim are integrally formed by casting. The shaft portion 14 is then integral with the arm portion 15 and the frame. The back cover 12 made by the above method is then attached to the preformed side wall 11 by screws.

The various embodiments described above and shown in the drawings are merely illustrative of the invention. Any modification of the present invention by a person of ordinary skill in the related art within the scope of the basic technical idea of the present invention is within the scope of the present invention.

Claims

1. A drum for a washing machine comprising a cylindrical sidewall (11) and a rear cover (12) connected to a rear end of the sidewall, characterized in that: the rear cover includes a holder (13) made of metal and a wall (17) made of plastic, wherein the holder includes a centrally located shaft portion (14) and a plurality of radially extending arm portions (15), the wall wrapping at least a portion of the holder.

2. The drum as claimed in claim 1, wherein: the bracket includes an annular rim (16), the arm portion being connected between the shaft portion and the rim.

3. The drum as claimed in claim 1, wherein: the edge of the bracket is provided with a plurality of screw holes (18), and screws penetrate through the side wall of the roller and are connected into the screw holes, so that the fixed installation of the rear cover and the side wall is realized.

4. The drum as claimed in claim 3, wherein: the screw hole is arranged at the outer end part of the arm part.

5. The drum as claimed in claim 1, wherein: the arm portion includes a rib (152) projecting generally axially.

6. The drum as claimed in claim 5, wherein: the arm portion includes a base (151) substantially perpendicular to the rib.

7. The drum as claimed in claim 6, wherein: the support includes an annular bezel, the base being coplanar with the bezel.

8. The drum as claimed in claim 5, wherein: the ribs face the inside of the drum.

9. The drum as claimed in claim 1, wherein: the side of the wall facing the outside of the drum is of smooth construction.

10. The drum as claimed in claim 1, wherein: the wall and the bracket are integrally formed by in-mold injection molding.

11. The drum as claimed in claim 1, wherein: the wall (17) comprises a first portion (17a) covering the support (13) and a second portion (17b) filling the gap between adjacent arms (15) and separating the space inside and outside the drum.

12. The drum as claimed in claim 1, wherein: the wall completely surrounds the stent.

13. Washing machine, its characterized in that: comprising a drum (10) according to any one of claims 1 to 12.

14. A method for manufacturing a drum for a washing machine, characterized by: comprising forming a carrier from metal, wherein the carrier comprises a central shaft portion and a plurality of radially extending arm portions, and then integrally forming a wall of plastic on the outside of the carrier by in-molding, wherein the wall surrounds at least a portion of the carrier, and a back cover comprising the wall and the carrier is attached to the preformed side wall.

15. Washing machine, its characterized in that: comprising a cylinder (10) manufactured according to the manufacturing method of claim 14.