CN111895716A

CN111895716A - Refrigerator and roller assembly

Info

Publication number: CN111895716A
Application number: CN202010694836.1A
Authority: CN
Inventors: 廖伟文; 徐展帆; 翟会杰
Original assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Current assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2020-11-06

Abstract

The invention relates to a refrigerator and a roller assembly, wherein the roller assembly comprises a roller and a rolling shaft, and the roller comprises a wheel main body and a wheel sleeve which are integrally injection-molded; the wheel sleeve is completely covered on the peripheral side of the wheel main body and is provided with a cylindrical peripheral surface; the wheel sleeve is made of flexible materials; one end of the rolling shaft is a fixed end for external connection; the other end of the rolling shaft is a connecting end which is used for supporting the wheel main body and enabling the wheel main body to rotate on the connecting end; the connecting end is provided with an axial limiting structure for axially limiting the wheel main body. In the roller assembly, the integral forming structure of the roller is utilized, so that the number of parts can be reduced. The wheel main body and the wheel sleeve are integrally formed, and no gap exists, so that the wheel does not shake. When the wheel rotates, the wheel main body supports the wheel sleeve, the wheel sleeve is made of flexible materials, soft contact between the roller and an external part is achieved, vibration of the roller in the moving process is absorbed, rolling smoothness of the roller is improved, noise generated by movement of the roller is reduced, and the effect of silence and silence of the roller is achieved.

Description

Refrigerator and roller assembly

Technical Field

The invention relates to the technical field of packaging structures, in particular to a refrigerator and a roller assembly.

Background

The refrigerator is a common electric appliance for storing food at low temperature, and the size of the refrigerator is larger and larger along with the development of science and technology. In a large-capacity refrigerator, the refrigerator is generally divided into a plurality of storage areas, and some storage areas are provided with drawers for taking and placing articles in a drawing manner.

In the related art, a drawer is moved in a refrigerator, and a roller member is usually required to be engaged. The roller part on the existing market usually adopts the roller part of a ball bearing, and the roller part adopting the structure has the defects of many parts, many processes, large gap, easy shaking, large noise and the like, and has the advantages of high manufacturing cost and more tedious processing and installation.

Disclosure of Invention

The invention aims to provide a roller assembly, which is used for simplifying the structure of the roller assembly in the prior art, improving the production and installation efficiency of the roller assembly and reducing the cost.

Another object of the present invention is to provide a refrigerator, which can simplify the structure of the roller assembly in the refrigerator, and reduce the manufacturing and installation costs of the refrigerator.

In order to solve the technical problems, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided a roller assembly including: the roller comprises a roller body and a roller sleeve which are integrally formed by injection molding; the wheel sleeve is cylindrical and completely covers the outer peripheral side of the wheel main body along the axial direction, and the wheel sleeve is provided with a cylindrical outer peripheral surface; the wheel sleeve is made of flexible materials, and the hardness of the material of the wheel main body is greater than that of the wheel sleeve; one end of the rolling shaft is a fixed end and is used for external connection; the other end of the connecting rod is a connecting end, and the connecting end extends into the axle center of the wheel main body and is used for supporting the wheel main body and enabling the wheel main body to rotate on the connecting end; and an axial limiting structure is arranged on the connecting end and used for axially limiting the wheel main body.

In some embodiments of the present application, the outer circumferential wall of the wheel body is provided with an annular rib; and an annular groove matched with the annular convex rib is formed on the inner surface of the wheel sleeve.

In some embodiments of the present application, the annular ribs are provided in plurality, and the plurality of annular ribs are distributed at intervals along the axial direction of the wheel main body; the annular grooves are provided with a plurality of annular convex ribs which are arranged in a one-to-one correspondence mode.

In some embodiments of the present application, the wheel body comprises: the inner wheel is cylindrical and can be rotatably sleeved on the connecting end; an outer ring having a cylindrical shape, which is positioned on the outer peripheral side of the inner ring and is concentrically arranged with the inner ring; the axial width of the outer wheel is larger than that of the inner wheel; and a bracket located between the inner wheel and the outer wheel, extending outwards from the outer wall of the inner wheel along the circumferential direction, and used for connecting and supporting the inner wheel and the outer wheel.

In some embodiments of the present application, the axial stopper structure includes: the first limiting step is arranged on the connecting end and positioned on one side, close to the fixed end, of the wheel main body, and the first limiting step is used for preventing the wheel main body from moving to the side of the fixed end; and the pressing ring is sleeved on the connecting end and is positioned on one side, away from the fixed end, of the wheel main body, and the pressing ring is used for preventing the wheel main body from moving away from the side of the fixed end.

In some embodiments of the present application, a second limiting step is disposed at an end of the connecting end away from the fixing end; the clamping ring is arranged at the second limiting step and is abutted against the second limiting step to prevent the clamping ring from being close to the wheel main body.

In some embodiments of the present application, the outer circumferential surface of the wheel body protrudes beyond the outer circumferential surface of the pressing ring.

In some embodiments of the present application, the wheel main body is kept away from the axial end face of the fixed end protrudes out of the corresponding end face of the pressing ring.

Some embodiments of this application, the stiff end is equipped with the external screw thread, seted up on the terminal surface of link and screwed the groove.

According to another aspect of the invention, the invention provides a refrigerator, which comprises a box body and a drawer movably arranged in the box body; the refrigerator is provided with the roller assembly; the roller assembly is fixedly arranged on the drawer through a fixed end of the roller, and the drawer is connected with the box body in a sliding mode through the roller assembly; or the roller assembly is fixedly arranged on the inner wall of the box body through the fixed end of the roller, and the drawer is erected on the roller assembly to be connected with the box body in a sliding mode.

According to the technical scheme, the embodiment of the invention at least has the following advantages and positive effects:

in the roller assembly of the embodiment of the invention, the structure of the roller assembly is optimized and simplified, wherein the integral forming structure of the roller is utilized, the number of the components of the roller assembly can be reduced, the wheel main body and the wheel sleeve are integrally formed, the structure is compact, no gap exists, and no shaking is generated; when rotating, usable wheel main part supports the wheel cover, for the gyro wheel provides sufficient rigidity, utilizes the wheel cover to make by flexible material simultaneously, realizes the soft contact of gyro wheel with outside moving part to absorb the vibration of gyro wheel in the motion process, improve the rolling ride comfort of gyro wheel, reduce the noise that the gyro wheel motion produced, with finally realize the noiseless effect of gyro wheel silence, improve user experience.

In addition, the roller in the roller assembly is utilized, the roller is preassembled on the roller, and the fixed end of the roller is directly installed and fixed, so that the installation difficulty of the roller assembly is reduced, and the installation efficiency of the roller assembly is improved.

Drawings

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a schematic view of an assembly structure of the storage compartment and the drawer of fig. 1.

Fig. 4 is a schematic view of the structure of the storage chamber of fig. 3.

Fig. 5 is an assembly structure diagram of the roller assembly of the present embodiment.

Fig. 6 is an exploded view of fig. 5.

Fig. 7 is an exploded view of the roller of fig. 6.

Fig. 8 is a cross-sectional view of fig. 5.

The reference numerals are explained below:

1. a box body; 11. a storage chamber;

2. a door body;

3. a drawer;

4. a roller assembly;

41. a roller; 42. a roller; 43. pressing a ring;

411. a connecting end; 412. a fixed end; 421. a wheel body; 422. a wheel sleeve;

4111. screwing grooves; 4112. a first limit step; 4113. a second limit step; 4211. an inner wheel; 4212. a support; 4213. an outer wheel; 4214. an annular convex rib; 4221. an annular groove.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention. Fig. 2 is a front view of fig. 1. Fig. 3 is a schematic view showing an assembled structure of the storage compartment 11 and the drawer 3 of fig. 1. Fig. 4 is a schematic structural view of the storage chamber 11 of fig. 3.

Referring to fig. 1 to 4, a refrigerator according to an embodiment of the present invention includes a refrigerator body 1, a door 2, a drawer 3, and a roller assembly 4.

The box body 1 can adopt a cuboid structure, and a plurality of storage chambers 11 which are mutually separated are arranged in the box body. The storage chamber 11 may be spaced up and down, and the storage chamber 11 may include a freezing chamber, a refrigerating chamber, and the like.

The door 2 is disposed at a front side of the cabinet 1 and is used to open or close the cabinet 1. The door 2 can be an integral switch for the box body 1. Or the door bodies 2 can be arranged corresponding to the storage chambers 11 one by one, namely, one storage chamber 11 is opened and closed correspondingly.

The drawer 3 is movably arranged in the storage chamber 11.

In some embodiments, the front side wall of the drawer 3 facing the door 2 may be exposed out of the cabinet 1, i.e. the front side wall of the drawer 3 directly serves as a part of the door 2. By pulling out or pushing in the drawer 3, the corresponding storage chamber 11 is opened and closed.

In some embodiments, the drawer 3 may further include a push-pull type door 31, and a frame body 32 is disposed at two sides in the door 31, and is slidably disposed in the corresponding storage chamber 11 through the frame body 32 by the door 31. A container (not shown) for storing articles in the drawer 3 is provided separately from the door unit 31 and the frame unit 32, and the container is erected on the frame unit 32 and positioned inside the door unit 31, and the container in the drawer 3 can be pulled out or pushed into the storage compartment 11 together with the door unit 31 and the frame unit 32.

In some embodiments, the drawer 3 may also be disposed inside the door 2, that is, a door 2 is additionally disposed at the front side of the drawer 3 for opening and closing the storage chamber 11 where the drawer 3 is located. The drawer 3 is movably erected in the door body 2, and articles are taken and placed by pulling out or pushing in the drawer 3 after the door body 2 is opened by pushing and pulling.

The roller assemblies 4 may be disposed on the inner wall of the storage chamber 11. The side wall of the drawer 3 is provided with a corresponding slide rail structure. The sliding connection between the drawer 3 and the storage chamber 11 is realized by the matching of the sliding rail of the drawer 3 and the roller assembly 4 on the inner wall of the storage chamber 11.

In some embodiments, the roller assemblies 4 may also be disposed directly at the sides of the drawer 3. The inner wall of the storage chamber 11 is provided with a corresponding slide rail structure. The roller assemblies 4 of the drawer 3 are matched with the sliding rails on the inner wall of the storage chamber 11, so that the drawer 3 is slidably connected with the storage chamber 11.

In some embodiments, the shelf 32 may be a sliding fit with the roller assembly 4 on the inner wall of the storage compartment 11. The container in the drawer 3 is mounted on the frame 32, and is drawn out or pushed into the storage compartment 11 together with the door unit 31 and the frame 32.

In some embodiments, the roller assemblies 4 may also be disposed directly on the carriage 32. The inner wall of the storage chamber 11 is provided with a corresponding slide rail structure. The roller assemblies 4 on the frame body 32 are engaged with the slide rails on the inner wall of the storage chamber 11, so that the door body 31 and the frame body 32 are pulled out or pushed into the storage chamber 11 together.

In the process of rolling and matching the roller assemblies 4 and the corresponding slide rails, the roller assemblies 4 generate certain noise. Therefore, the structure of the roller assembly 4 is optimized in the embodiment, so that the noise is reduced, a mute or silent rolling effect is realized, and the user experience is improved. Meanwhile, the structure of the roller assembly 4 is simplified, so that the number of parts of the roller assembly 4 is reduced, the number of procedures and the process difficulty are reduced, the roller assembly 4 is convenient to assemble in the refrigerator, and the overall cost of the roller assembly 4 and the refrigerator is reduced.

The structure of the roller assembly 4 will be specifically described below to explain the optimization and simplification of the structure of the roller assembly 4 in the present embodiment.

Fig. 5 is an assembly structure diagram of the roller assembly 4 of the present embodiment. Fig. 6 is an exploded view of fig. 5. Fig. 7 is an exploded view of the roller 42 of fig. 6. Fig. 8 is a cross-sectional view of fig. 5.

Referring to fig. 5 to 8, the roller assembly 4 of the present embodiment includes a roller 41, a roller 42 rotatably sleeved on the roller 41, and an axial limiting structure disposed on the roller 41.

The roller 42 is a main component of the roller assembly 4. Specifically, the roller 42 includes a wheel main body 421 and a wheel housing 422.

The wheel cover 422 is cylindrical and is fitted around the outer periphery of the wheel main body 421. The wheel cover 422 covers the outer peripheral side of the wheel main body 421, and completely covers the outer peripheral surface of the wheel main body 421 in the axial direction. That is, the wheel sleeve 422 serves as a circumferential side outer surface and a circumferential side contact surface of the entire roller 42, and is used for contacting the outside when the roller 42 rolls.

The wheel sleeve 422 has a cylindrical outer peripheral surface for increasing a contact area with an external moving member. For example, the wheel sleeve 422 is in surface contact with the slide rail, so that the contact area is increased, and the contact force is reduced.

Meanwhile, since the wheel housing 422 is in surface contact with the external moving member, the roller 42 is allowed to have a certain mounting error at the time of mounting. That is, in the case where the roller 42 has a certain mounting error, the wheel housing 422 and the external moving member can be brought into stable surface contact. Therefore, the process requirements and the installation requirements of the idler wheel 42 and the corresponding parts of the refrigerator are reduced to a certain extent, the rolling reliability of the idler wheel 42 is improved, and the drawer 3 is pushed and pulled more smoothly.

The wheel cover 422 is made of a flexible material. Such as silica gel or rubber material, to provide the wheel cover 422 with certain elasticity and shock absorption effect. When the roller 42 contacts with an external moving part, the soft contact at the outer peripheral surface of the roller 42 can be realized by using the material property of the wheel sleeve 422. The vibration generated during the rolling of the roller 42 can be absorbed by the wheel housing 422. Therefore, the rolling smoothness of the roller 42 can be improved, the noise of the roller 42 is reduced, even the effect of silence and silence is achieved, and the user experience is improved.

The wheel main body 421 is rotatably fitted over the roller 41. The wheel main body 421 has a sufficient hardness for supporting the wheel cover 422. The material hardness of the wheel main body 421 is higher than that of the wheel cover 422. The wheel body 421 can be made of thermoplastic plastics, such as POM polyformaldehyde material, and has excellent hardness, toughness, tensile strength and wear resistance.

The wheel main body 421 and the wheel cover 422 adopt an integral injection molding structure. The wheel main body 421 is formed by injection molding in a secondary injection molding manner, and then the wheel sleeve 422 is formed by injection molding on the outer layer of the wheel main body 421. By using the integral injection molding structure of the wheel main body 421 and the wheel sleeve 422, no gap is formed between the wheel main body 421 and the wheel sleeve 422, and looseness or shaking cannot be generated. Therefore, the noise generated inside the roller 42 when the roller 42 rolls can be reduced or eliminated, and the silencing effect of the roller 42 can be further realized.

Referring to fig. 7 and 8, in some embodiments, the wheel body 421 may include an inner wheel 4211, a support 4212, and an outer wheel 4213.

The inner wheel 4211 is cylindrical, and the inner wheel 4211 is rotatably fitted around the roller 41.

A support 4212 is located between the inner wheel 4211 and the outer wheel 4213, and extends circumferentially outward from the outer wall of the inner wheel 4211 for connecting and supporting the inner wheel 4211 and the outer wheel 4213.

The outer ring 4213 is cylindrical, and the outer ring 4213 is positioned on the outer circumferential side of the inner ring 4211 and is concentrically arranged with the inner ring 4211.

The outer wheel 4213 has an axial width greater than that of the inner wheel 4211. Therefore, when the hub 422 completely covers the outer peripheral side of the outer ring 4213, the contact area between the hub 422 and the external moving member can be increased. Meanwhile, the contact area between the inner wheel 4211 and the roller 41 is small, so that the friction area and friction noise between the roller 42 and the roller 41 when the roller 42 rolls can be reduced.

Referring to fig. 7 and 8, in some embodiments, the outer circumference of the outer ring 4213 may be provided with an annular rib 4214, and the annular rib 4214 is formed by the annular rib 4214 protruding outward in the circumferential direction. Therefore, during the secondary injection molding, the annular groove 4221 matched with the annular convex rib 4214 can be formed on the inner surface of the wheel sleeve 422.

A plurality of annular ribs 4214 may be provided on the outer wheel 4213, and the plurality of annular ribs 4214 are axially spaced apart from each other. The annular grooves 4221 on the wheel sleeve 422 are correspondingly formed in plurality, and are arranged in one-to-one correspondence with the annular ribs 4214.

The arrangement of the annular ribs 4214 and the annular grooves 4221 can increase the contact area between the wheel main body 421 and the wheel sleeve 422, so that the overall firmness of the roller 42 integrally formed by injection molding is higher.

Still referring to fig. 5 to 8, a roller 41 is another main component of the roller assembly 4.

One end of the roller 41 is a connecting end 411, and the connecting end 411 extends into the axle center of the wheel main body 421. The connecting end 411 is used to support the entire roller 42 and allow the roller 42 to rotate on the connecting end 411. For example, the inner wheel 4211 is rotatably sleeved on the connecting end 411 of the roller 41, and the roller 42 and the roller 41 can be preassembled into a whole through the connecting end 411, so as to be conveniently and quickly installed in the refrigerator in an assembly mode in the subsequent refrigerator assembling process.

The other end of the roller 41 is a fixed end 412, and the fixed end 412 is used as a free end of the roller assembly 4 for external connection. The fixing end 412 is used to connect the inner wall of the drawer 3 or the storage chamber 11 during the subsequent refrigerator assembling process.

In some embodiments, the securing end 412 is externally threaded. Meanwhile, a screw groove 4111, such as a cross groove, a straight groove or an inner hexagon groove, is formed on the end surface of the connecting end 411. In the subsequent refrigerator assembling process, the fixed end 412 of the roller 41 may be quickly mounted on the inner wall of the drawer 3 or the storage compartment 11 by using the screw groove 4111 and a corresponding screw tool, such as a phillips screwdriver, a straight screwdriver or a hexagonal handle, so as to realize the quick mounting of the roller assembly 4.

Referring to fig. 6 and 8, the axial limiting structure is disposed at the connecting end 411 of the roller 41, and is used for axially limiting the wheel body 421 to prevent the roller 42 from moving in the axial direction of the roller 41.

In some embodiments, the axial stop feature may include a first stop step 4112 and a compression ring 43. Utilize clamping ring 43 and the cooperation of first spacing step 4112, carry out spacingly respectively to the both ends side of gyro wheel 42.

A first limiting step 4112 is formed at one side of the connection end 411 close to the fixed end 412. When the roller 42 is sleeved on the roller 41, the first limiting step 4112 is located on a side of the wheel body 421 close to the fixing end 412, and the first limiting step 4112 is used for limiting a side of the wheel body 421 to prevent the wheel body 421 from moving toward the fixing end 412.

The press ring 43 is fitted around the end of the connecting end 411 away from the fixed end 412. When the roller 42 is sleeved on the roller 41, the pressing ring 43 is located on one side of the wheel main body 421 away from the fixing end 412, and the pressing ring 43 is used for limiting one end side of the wheel main body 421 to prevent the wheel main body 421 from moving away from the fixing end 412.

Still referring to fig. 6 and 8, in some embodiments, a second limiting step 4113 is provided at the end of the connecting end 411 away from the fixing end 412. The pressing ring 43 is disposed at the second limiting step 4113 and abuts against the second limiting step 4113. For example, the pressing ring 43 may be riveted at the second limit step 4113 of the connection end 411.

The spacing step 4113 in second can prevent the clamping ring 43 from being close to the wheel main body 421, so that the distance between the clamping ring 43 and the first spacing step 4112 is fixed, and the inner wheel 4211 can rotate freely between the clamping ring 43 and the first spacing step 4112.

Referring to fig. 8, in some embodiments, the compression ring 43 is housed inside the wheel body 421. The outer peripheral surface of the wheel main body 421 protrudes beyond the outer peripheral surface of the pressing ring 43. The axial end face of the wheel body 421 remote from the fixed end 412 projects beyond the corresponding end face of the pressure ring 43. For example, the pressure ring 43 is installed within the outline of the outer wheel 4213. Therefore, when the roller 42 rolls, the external moving parts can be prevented from contacting the press ring 43, and the press ring 43 can be effectively prevented from loosening and generating noise due to the contact with the external moving parts.

In some embodiments, the axial end surface of the wheel main body 421 away from the fixed end 412 protrudes out of the corresponding end surface of the connecting end 411, so as to further prevent the external moving component from contacting the roller 41, and effectively prevent noise generated by the contact between the roller 41 and the external moving component.

Referring to fig. 6, when the roller assembly 4 is manufactured, only three parts, namely, the roller 42, the roller 41 and the pressing ring 43, need to be manufactured. The roller 42 is integrally injection molded, and the roller 41 and the pressing ring 43 are machined separately. Therefore, the roller assembly 4 provided by the embodiment has the advantages of few processing parts, few turnover fields, simple processing technology, high production efficiency and capability of effectively reducing the manufacturing cost.

When the roller assembly 4 is internally assembled, the roller 42 is sleeved on the roller 41, and then the pressing ring 43 is riveted on the roller 41, so that the internal assembly of the roller assembly 4 can be completed in two steps. When the roller assembly 4 is externally installed, it is directly connected to the outside through the fixed end 412 of the roller 41. The assembly efficiency and the installation efficiency of the roller assemblies 4 can be effectively improved.

Based on the technical scheme, the embodiment of the invention at least has the following advantages and positive effects:

in the roller assembly 4 of the embodiment of the present invention, the structure of the roller assembly 4 is optimized and simplified. Wherein, the number of the constituent parts of the roller assembly 4 can be reduced by the integral molding structure of the roller 42. The wheel main body 421 and the wheel sleeve 422 are integrally formed, and have compact structure and no gap, so that the wheel does not shake. The wheel housing 422 can be supported by the wheel main body 421 while rotating, providing sufficient rigidity to the roller 42. Meanwhile, the wheel sleeve 422 is made of flexible material, so that the soft contact of the roller 42 and the external moving part is realized. Therefore, the vibration of the roller 42 in the moving process is absorbed, the rolling smoothness of the roller 42 is improved, and the noise generated by the movement of the roller 42 is reduced, so that the silent and silent effect of the roller 42 is finally realized, and the user experience is improved.

In addition, the roller 41 in the roller assembly 4 is utilized, the roller 42 is pre-installed on the roller 41 and is directly installed and fixed through the fixed end 412 of the roller 41, so that the installation difficulty of the roller assembly 4 is reduced, and the installation efficiency of the roller assembly 4 is improved.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A roller assembly, comprising:

the roller comprises a roller body and a roller sleeve which are integrally formed by injection molding; the wheel sleeve is cylindrical and completely covers the outer peripheral side of the wheel main body along the axial direction, and the wheel sleeve is provided with a cylindrical outer peripheral surface; the wheel sleeve is made of flexible materials, and the hardness of the material of the wheel main body is greater than that of the wheel sleeve; and

a roller, one end of which is a fixed end and is used for connecting to the outside; the other end of the connecting rod is a connecting end, and the connecting end extends into the axle center of the wheel main body and is used for supporting the wheel main body and enabling the wheel main body to rotate on the connecting end; and an axial limiting structure is arranged on the connecting end and used for axially limiting the wheel main body.

2. The roller assembly according to claim 1, wherein the outer peripheral wall of the wheel body is provided with an annular rib; and an annular groove matched with the annular convex rib is formed on the inner surface of the wheel sleeve.

3. The roller assembly according to claim 2, wherein a plurality of the annular ribs are provided, and the plurality of the annular ribs are spaced apart in the axial direction of the wheel main body;

the annular grooves are provided with a plurality of annular convex ribs which are arranged in a one-to-one correspondence mode.

4. The roller assembly of claim 1, wherein the wheel body includes:

the inner wheel is cylindrical and can be rotatably sleeved on the connecting end;

an outer ring having a cylindrical shape, which is positioned on the outer peripheral side of the inner ring and is concentrically arranged with the inner ring; the axial width of the outer wheel is larger than that of the inner wheel; and

a bracket located between the inner wheel and the outer wheel, extending circumferentially outward from an outer wall of the inner wheel, for connecting and supporting the inner wheel and the outer wheel.

5. The roller assembly of claim 1 wherein the axial stop structure includes:

the first limiting step is arranged on the connecting end and positioned on one side, close to the fixed end, of the wheel main body, and the first limiting step is used for preventing the wheel main body from moving to the side of the fixed end; and

the clamping ring is sleeved on the connecting end and located on one side, away from the fixed end, of the wheel body, and the clamping ring is used for preventing the wheel body from moving towards the side away from the fixed end.

6. The roller assembly of claim 5, wherein the end of the connecting end away from the fixed end is provided with a second limiting step;

the clamping ring is arranged at the second limiting step and is abutted against the second limiting step to prevent the clamping ring from being close to the wheel main body.

7. The roller assembly of claim 5 wherein the outer circumferential surface of the wheel body projects beyond the outer circumferential surface of the pressure ring.

8. The roller assembly of claim 5 wherein an axial end face of the wheel body remote from the fixed end projects beyond a corresponding end face of the pressure ring.

9. The roller assembly of claim 1, wherein the fixed end is provided with an external thread, and the end face of the connecting end is provided with a screwing groove.

10. A refrigerator is characterized by comprising a refrigerator body and a drawer movably arranged in the refrigerator body;

the refrigerator is provided with the roller assembly of any one of claims 1 to 9;

the roller assembly is fixedly arranged on the drawer through a fixed end of the roller, and the drawer is connected with the box body in a sliding mode through the roller assembly; alternatively, the first and second electrodes may be,

the roller assembly is fixedly arranged on the inner wall of the box body through the fixed end of the roller, and the drawer is erected on the roller assembly to be connected with the box body in a sliding mode.