CN110894848B

CN110894848B - Bearing assembly and washing machine

Info

Publication number: CN110894848B
Application number: CN201811057986.0A
Authority: CN
Inventors: 杨飞; 卢金波; 李丽平; 于亮亮
Original assignee: Qingdao Haier Washing Electric Appliance Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Electric Appliance Co Ltd; Haier Smart Home Co Ltd
Priority date: 2018-09-11
Filing date: 2018-09-11
Publication date: 2022-03-15
Anticipated expiration: 2038-09-11
Also published as: CN110894848A

Abstract

The invention belongs to the technical field of washing machines and discloses a bearing assembly which comprises a front bearing and a rear bearing, wherein an inner cylinder shaft is arranged on the front bearing and the rear bearing in a penetrating mode, a shaft sleeve is arranged between the front bearing and the rear bearing, when the inner cylinder shaft is fastened to an inner ring of the rear bearing, the inner ring of the rear bearing presses the shaft sleeve on the inner ring of the front bearing. According to the invention, the shaft sleeve is arranged, and when the inner cylinder shaft is fastened on the inner ring of the rear bearing to rotate along with the inner ring, the inner ring of the rear bearing can press the shaft sleeve on the inner ring of the front bearing, and the inner ring of the front bearing can synchronously rotate along with the inner cylinder shaft and the inner ring of the rear bearing, so that relative motion between the inner cylinder shaft and the inner ring of the front bearing can be avoided, further abrasion between the inner cylinder shaft and the inner ring of the front bearing is avoided, and the service life is prolonged.

Description

Bearing assembly and washing machine

Technical Field

The invention relates to the technical field of washing machines, in particular to a bearing assembly and a washing machine.

Background

The drum washing machine includes inner drum, outer drum, casing, observation window pad, motor and other structure. In order to keep the inner drum of the drum washing machine rotating, a front bearing and a rear bearing are usually installed at the rear part of the outer drum, an inner drum shaft is arranged through the two bearings, the inner drum shaft is fastened to an inner ring of the rear bearing through a bolt, and the inner ring of the front bearing is in clearance fit with the inner drum shaft.

The rear bearing inner ring is fastened with an inner cylinder shaft through a bolt in the prior art, and when the inner cylinder shaft rotates, the rear bearing inner ring can rotate along with the inner cylinder shaft. However, because the inner ring of the front bearing is in clearance fit with the inner cylinder shaft, when the inner cylinder shaft rotates, the inner ring of the front bearing and the inner cylinder shaft move relatively, so that the inner ring of the bearing and the inner cylinder shaft are abraded, and the service life of the bearing and the inner cylinder shaft is shortened.

Disclosure of Invention

The invention aims to provide a bearing assembly and a washing machine, and aims to solve the problems that a front bearing and an inner barrel shaft of the existing washing machine are abraded and the service life is shortened.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bearing assembly comprises a front bearing and a rear bearing, wherein an inner cylinder shaft penetrates through the front bearing and the rear bearing, a shaft sleeve is arranged between the front bearing and the rear bearing, and when the inner cylinder shaft is fastened on an inner ring of the rear bearing, the inner ring of the rear bearing presses the shaft sleeve on the inner ring of the front bearing.

Preferably, the bearing further comprises a wave washer, and the wave washer is located between the shaft sleeve and the inner ring of the rear bearing.

Preferably, the wave washer further comprises a flat washer, and the flat washer is located between the shaft sleeve and the wave washer.

Preferably, the shaft sleeve comprises a reducing section and a flaring section which are connected, the end face of the reducing section abuts against the flat washer, and the end face of the flaring section abuts against the inner ring of the front bearing.

Preferably, the outer diameter of the constricted section is not greater than the outer diameter of the flat washer.

The invention also provides a washing machine comprising the bearing assembly.

Preferably, the inner cylinder shaft comprises a large shaft section and a small shaft section, the large shaft section is arranged in the inner ring of the front bearing in a penetrating mode, and the small shaft section is arranged in the inner ring of the rear bearing in a penetrating mode.

Preferably, the necking section of the shaft sleeve is sleeved at the small shaft section.

Preferably, the small shaft section is also connected with a belt pulley and is driven by the belt pulley to rotate.

The invention has the beneficial effects that: through setting up the axle sleeve to when the inner circle of inner tube axle fastening back bearing rotated along with it, the inner circle of back bearing can compress tightly the axle sleeve on the inner circle of front bearing, and make the inner circle of front bearing rotate along with the inner circle of inner tube axle and back bearing is synchronous together, can avoid the relative motion between the inner circle of inner tube axle and front bearing, and then avoided the wearing and tearing of inner tube axle and front bearing's inner circle, prolonged life.

Drawings

FIG. 1 is a schematic view showing a structure of a washing machine according to the present invention;

FIG. 2 is an exploded view of the washing machine of the present invention;

FIG. 3 is an enlarged schematic view taken at A of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic view of the construction of the bushing of the present invention;

fig. 5 is a schematic view of the wave washer of the present invention.

In the figure:

1. a front bearing; 2. a rear bearing; 3. a shaft sleeve; 4. a wave washer; 5. a flat washer; 6. a bolt; 31. a necking section; 32. a flared section; 10. an inner cylindrical shaft; 20. an inner barrel; 30. an outer cylinder; 40. a belt pulley; 101. a large shaft section; 102. a small shaft section.

Detailed Description

The technical scheme of the invention is further explained by a specific embodiment formula in combination with the attached drawings.

The present invention provides a bearing assembly, which is installed on a washing machine (as shown in fig. 1 and 2), and by which an inner tub shaft 10 of the washing machine can be prevented from being worn. Specifically, referring to fig. 3, the bearing assembly includes a front bearing 1, a rear bearing 2, a shaft sleeve 3, and a wave washer 4, wherein:

the inner tub shaft 10 of the above washing machine is inserted into the inner rings of the front bearing 1 and the rear bearing 2, and the inner tub shaft 10 is fastened to the inner ring of the rear bearing 2 by the bolt 6, which can then rotate together with the inner ring of the bearing 2.

A shaft sleeve 3 is arranged between the front bearing 1 and the rear bearing 2, the shaft sleeve 3 is sleeved on the inner cylinder shaft 10, when the inner cylinder shaft 10 is fastened on the inner ring of the rear bearing 2, the inner ring of the rear bearing 2 can apply force to one end of the shaft sleeve 3, the other end of the shaft sleeve 3 is pressed on the end face of the inner ring of the front bearing 1 under the force, so that the inner ring of the rear bearing 2, the shaft sleeve 3 and the inner ring of the front bearing 1 are pressed together, and further when the inner cylinder shaft 10 rotates, the inner ring of the rear bearing 2, the shaft sleeve 3 and the inner ring of the front bearing 1 synchronously rotate along with the inner cylinder shaft 10.

In this embodiment, as shown in fig. 4, the sleeve 3 includes a reduced section 31 and a flared section 32, wherein an outer diameter of the reduced section 31 is smaller than an outer diameter of the flared section 32, an end surface of the reduced section 31 may abut against an inner ring of the rear bearing 2, and an end surface of the flared section 32 may abut against an end surface of the front bearing 1.

In this embodiment, by providing the shaft sleeve 3, and abutting the two ends of the shaft sleeve 3 against the inner ring of the front bearing 1 and the inner ring of the rear bearing 2, when the inner shaft 10 is fastened to the inner ring of the rear bearing 2 and rotates therewith, the inner ring of the rear bearing 2 presses the shaft sleeve 3 against the inner ring of the front bearing 1, and the inner ring of the front bearing 1 rotates synchronously with the inner shaft 10 and the inner ring of the rear bearing 2, so as to avoid the relative movement between the inner shaft 10 and the inner ring of the front bearing 1, further avoid the abrasion between the inner shaft 10 and the inner ring of the front bearing 1, and prolong the service life.

In this embodiment, the shaft sleeve 3 can enable the inner ring of the front bearing 1 to synchronously rotate along with the inner cylindrical shaft 10 and the inner ring of the rear bearing 2, but the tolerance requirement on the shaft sleeve 3 is strict, the machining precision requirement is very high, and this can also lead to the increase of the production cost of the shaft sleeve 3. Therefore, in order to reduce the processing requirement and the processing cost, in the present embodiment, the wave washer 4 is further disposed between the shaft sleeve 3 and the inner ring of the rear bearing 2 (the structure of the wave washer 4 is shown in fig. 5), the wave washer 4 is sleeved on the inner cylindrical shaft 10, and the necking section 31 of the shaft sleeve 3 can press against the wave washer 4. Through the elastic deformation of this wave form packing ring 4 self, can make this wave form packing ring 4 have great compressive capacity, and then need not axle sleeve 3 to have higher machining precision, can realize that the inner circle of rear bearing 2 exerts force to axle sleeve 3. The precision requirement of the shaft sleeve 3 and other parts during machining can be reduced, and the machining cost is reduced.

Further, in the present embodiment, a flat washer 5 is further disposed between the sleeve 3 and the wave washer 4, and the flat washer 5 is fitted over the inner cylindrical shaft 10. The end face of the necking section 31 of the shaft sleeve 3 contacts with the flat washer 5, and the effective area of interaction between the shaft sleeve 3 and the wave washer 4 can be increased through the flat washer 5, so that the shaft sleeve 3 can realize synchronous rotation between the inner ring of the front bearing 1 and the inner ring of the rear bearing 2.

In this embodiment, the outer diameter of the necking section 31 of the shaft sleeve 3 is not larger than the outer diameter of the flat washer 5, so that the end of the necking section 31 can be ensured to be in full contact with the flat washer 5.

The present invention also provides a washing machine, as shown in fig. 1 and 2, which includes an inner tub shaft 10, an inner tub 20, an outer tub 30, and the above-described bearing assembly. As shown in fig. 3, the inner cylinder shaft 10 includes a large shaft section 101 and a small shaft section 102, the large shaft section 101 penetrates through the inner ring of the front bearing 1, the small shaft section 102 penetrates through the inner ring of the rear bearing 2, the end of the small shaft section 102 is further connected to a belt pulley 40, the belt pulley 40 is driven by a driving mechanism to rotate, and the belt pulley 40 can drive the inner cylinder shaft 10 to rotate. The necking section 31 of the shaft sleeve 3 is sleeved at the small shaft section 102 and can synchronously rotate along with the inner cylinder shaft 10.

In this embodiment, the inner cylindrical shaft 10 is fastened to the inner race of the rear bearing 2 by a bolt 6 so that the inner race of the rear bearing 2 rotates therewith.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A bearing assembly comprises a front bearing (1) and a rear bearing (2), wherein an inner cylinder shaft (10) penetrates through the front bearing (1) and the rear bearing (2), and is characterized in that a shaft sleeve (3) is arranged between the front bearing (1) and the rear bearing (2), when the inner cylinder shaft (10) is fastened on an inner ring of the rear bearing (2), the inner ring of the rear bearing (2) presses the shaft sleeve (3) on the inner ring of the front bearing (1);

the rear bearing further comprises a wave washer (4), wherein the wave washer (4) is positioned between the shaft sleeve (3) and an inner ring of the rear bearing (2);

the flat washer (5) is positioned between the shaft sleeve (3) and the wave washer (4); the shaft sleeve (3) comprises a necking section (31) and a flaring section (32) which are connected, the end surface of the necking section (31) is abutted against the flat gasket (5), and the end surface of the flaring section (32) is abutted against the inner ring of the front bearing (1);

the outer diameter of the necking section (31) is not larger than the outer diameter of the flat gasket (5).

2. A washing machine comprising a bearing assembly as claimed in claim 1.

3. Washing machine according to claim 2, characterized in that the inner drum shaft (10) comprises a large shaft section (101) and a small shaft section (102), the large shaft section (101) being arranged through the inner ring of the front bearing (1) and the small shaft section (102) being arranged through the inner ring of the rear bearing (2).

4. Washing machine according to claim 3, characterized in that the reduced section (31) of the bushing (3) is sleeved at the small shaft section (102).

5. Washing machine according to claim 4, characterized in that the small shaft segment (102) is further connected with a belt pulley (40) and is driven by the belt pulley (40) to rotate.