CN112146341A

CN112146341A - Drawer assembly and household appliance

Info

Publication number: CN112146341A
Application number: CN201910572610.1A
Authority: CN
Inventors: 王亮; 刘春丽; 张敏
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-12-29
Anticipated expiration: 2039-06-27
Also published as: CN112146341B

Abstract

A drawer assembly and a domestic appliance, the drawer assembly comprising: the drawer is provided with a mounting part, and the mounting part is provided with a through hole; the fixing block is arranged on the first side of the mounting part and is provided with a coupling hole opposite to the through hole; a roller assembly including a roller rotatably fixed to a fixing shaft, and the fixing shaft including a coupling part passing through the through hole from a second side of the mounting part and threadedly coupled with the coupling hole; the fixing shaft includes a positioning portion located in the through hole, the positioning portion having an outer diameter larger than the coupling portion in a radial direction of the fixing shaft, the outer diameter of the positioning portion being adapted to the aperture of the through hole to restrict radial movement of the fixing shaft. According to the scheme provided by the invention, the drawer can be effectively prevented from cracking due to screw biting, the service life of the drawer is prolonged, the centering effect can be achieved through the matching of the positioning part and the through hole, and the movement effect of the drawer is optimized.

Description

Drawer assembly and household appliance

Technical Field

The embodiment of the invention relates to the technical field of household appliances, in particular to a drawer assembly and a household appliance.

Background

In order to facilitate the use of the household appliance, a drawer or other storage components may be disposed in the cavity of the household appliance, such as a refrigerator, so that a user can put the stored objects in the drawer and take and place the stored objects in a manner of pulling the drawer when necessary.

In order to optimize the user experience, rollers are usually installed on the existing drawer, for example, rollers are installed on the left and right sides of the drawer in the width direction, so as to reduce friction.

In the prior art, the roller is usually screwed on the drawer directly through a screw, and when the drawer is made of a transparent brittle material, the screw column on the drawer is easy to crack due to the combination mode. Once the screw columns on the drawer slide, the whole drawer must be scrapped, so that the service life of the drawer is short, and the maintenance cost of a user is high.

On the other hand, according to the conventional assembly mode, the centering of the roller depends on the thread section of the screw contacted with the drawer, but the thread section cannot achieve the centering effect actually, and the roller cannot be effectively fixed in the radial direction during rotation, so that the overall movement effect of the drawer is influenced.

Disclosure of Invention

It is an object of embodiments of the present invention to provide an improved drawer assembly and domestic appliance.

Accordingly, embodiments of the present invention provide a drawer assembly, comprising: the drawer is provided with a mounting part, and the mounting part is provided with a through hole; the fixing block is arranged on the first side of the mounting part and is provided with a coupling hole opposite to the through hole; a roller assembly including a roller rotatably fixed to a fixing shaft, and the fixing shaft including a coupling part passing through the through hole from a second side of the mounting part and threadedly coupled with the coupling hole; the fixing shaft includes a positioning portion located in the through hole, the positioning portion having an outer diameter larger than the coupling portion in a radial direction of the fixing shaft, the outer diameter of the positioning portion and the aperture of the through hole being adapted to restrict radial movement of the fixing shaft.

Because the coupling part is not directly screwed on the drawer body, the risk that the drawer body is cracked due to screw biting can be effectively avoided, and the service life of the drawer is favorably prolonged. Furthermore, the cooperation of location portion and through-hole can play the centering to the motion of restriction gyro wheel in radial ascending, optimize the motion effect of drawer. Furthermore, because the installation part is not provided with threads, the roller component is in threaded connection with an additionally arranged fixed block, when the coupling hole on the fixed block has sliding teeth, only the fixed block needs to be replaced, the whole drawer does not need to be scrapped, the service life of the drawer is prolonged, and the maintenance cost is reduced.

Optionally, the inner wall of the through hole is smooth, and the positioning part is a cylinder. Because the through hole is not internally provided with the internal thread and the aperture of the through hole is larger than the outer diameter of the coupling part, the through hole cannot be damaged by the fixing shaft in the assembling process. Furthermore, the design of cylinder does benefit to the area of contact of increase location portion and through-hole, when guaranteeing to the radial spacing effect of gyro wheel, disperses the effort that the drawer applied to the gyro wheel, prolongs wheel components's life.

Optionally, along the axial direction of the fixing shaft, the length of the coupling portion is not less than that of the coupling hole, so that the fixing shaft and the fixing block are locked, the movement of the roller is limited in the axial direction, and the movement effect of the drawer is optimized.

Optionally, the fixed shaft further has a shaft portion, the roller is sleeved on the shaft portion and can rotate relative to the shaft portion, and the diameter of the shaft portion is larger than the outer diameter of the positioning portion. From this, the axial region can't stretch into the through-hole to avoid the fixed axle too to stretch into the fixed block and lead to the gyro wheel to support in the second side of installation department excessively tightly, influence the motion effect of drawer.

Optionally, the second end of the positioning portion is connected to the first end of the shaft portion along the axial direction of the fixing shaft, and a step is formed at a joint. Therefore, the step can be abutted against the second side of the mounting part, so that the effect of limiting the movement of the roller wheel along the axial direction is achieved.

Optionally, the roller assembly includes: the separation blade is sleeved on the positioning portion in a non-movable mode, the separation blade is provided with a first side and a second side which are opposite to each other along the axial direction of the fixing shaft, and the second side of the separation blade abuts against the second side of the mounting portion. Therefore, the blocking sheet is sleeved on the positioning part in a non-movable manner, so that the fixed shaft, the roller and the blocking sheet can be assembled into an assembly unit through a simple assembly process, and the assembly unit is assembled to a part to be supported (for example, a storage part such as a drawer) as a whole. Further, after the roller assembly is installed on the drawer, the roller and the installation part are separated through the separation blade, and the roller and the installation part are prevented from being rubbed to influence the rotating effect. Furthermore, the separation blade is positioned on the inner side of the roller, so that the separation blade is not stressed when the roller is stressed axially, and the falling risk of the separation blade is reduced.

Optionally, the first side of the blocking piece abuts against a step between the positioning portion and a shaft portion, the roller is sleeved on the shaft portion and can rotate relative to the shaft portion, and the diameter of the shaft portion is larger than the outer diameter of the positioning portion. Therefore, the design of the steps is beneficial to ensuring that the blocking pieces are pressed to proper positions, and the blocking pieces are completely positioned relative to the fixed shaft after being pressed in place, so that the blocking pieces, the fixed shaft and the roller can be integrated into a roller assembly. Further, after the roller assembly is installed on the drawer, the roller is prevented from rubbing the drawer during movement of the drawer due to separation of the roller and the drawer by the separation piece, and noise reduction is facilitated.

Optionally, in the axial direction of the fixing shaft, a distance between the first side of the blocking piece and the second end of the shaft portion is greater than a length of a portion of the roller contacting the shaft portion, wherein the second end of the shaft portion is an end far away from the blocking piece. Therefore, gaps are reserved between the two sides of the roller in the axial direction and the second end of the shaft portion and the blocking piece respectively, and the roller can rotate freely around the shaft portion.

Optionally, the blocking piece is sleeved on the positioning portion in an interference fit manner. The interference fit connection simplifies the assembly process of the baffle and the fixed shaft, and the baffle and the fixed shaft can be assembled manually or by simple tools.

Optionally, the fixing shaft further has a head portion, a first end of the head portion is connected to a second end of the shaft portion along an axial direction of the fixing shaft, the head portion is formed with a flange, and the first end of the shaft portion is connected to the second end of the positioning portion. Therefore, the fixing shaft with the anti-dropping head, the roller and the blocking sheet can be assembled into an assembly unit through a simple assembly process, and the assembly unit is assembled to the drawer as a whole. Further, after the roller assembly is installed on the drawer, the blocking piece is matched with the head to limit the roller to move along the axial direction, and the roller is prevented from falling off from the fixed shaft.

Optionally, the fixed shaft is a screw with an external thread at the coupling part, and the flange is formed by a screw head. Thereby, the roller can be restrained in place by the screw fixing structure.

The present invention also provides a household appliance comprising: the drawer assembly described above; a rail positioned on at least one side of the drawer assembly, the drawer being supported to the rail by the roller assemblies and adapted to slide along the rail. From this, firmly form the drawer subassembly of modularization and can wholly be applied to domestic appliance to, drawer and the wheel components of drawer subassembly can dismantle the connection, when the smooth tooth scheduling problem that appears, can only change partial part in the drawer subassembly, need not to change whole drawer subassembly, thereby the life of extension drawer reduces the maintenance cost.

The present invention also provides a roller assembly, comprising: a roller; a fixing shaft including a shaft portion and a head portion integrally formed with the shaft portion and having an outer diameter larger than the shaft portion, the roller being rotatably fitted over the shaft portion, the head portion being located at a first side of the roller in an axial direction of the fixing shaft, the fixing shaft including a connecting portion located at a second side of the roller; the separation blade, the separation blade interference fit ground cover is located connecting portion make the gyro wheel, the fixed axle with the separation blade forms an equipment unit.

Therefore, the separation blade is in interference fit with the connecting part, so that the roller assembly formed by the roller, the fixed shaft and the separation blade is integrally in a firm assembly state, and unexpected separation in the transportation process is avoided. The interference fit connection simplifies the assembly process of the baffle and the fixed shaft, and the baffle and the fixed shaft can be assembled manually or by simple tools. Therefore, the fixing shaft with the head for preventing the falling off, the roller and the shutter can be assembled into an assembly unit by a simple assembly process, and the assembly unit is reassembled as a whole to a member to be supported (for example, a storage member such as a drawer). After the roller assembly is installed on a part to be supported, the separation blade is positioned on the inner side of the roller, so that the separation blade is not stressed when the roller is stressed axially, and the falling risk of the separation blade is reduced. Therefore, it is desirable to obtain a roller assembly with fewer parts, less assembly difficulty and less assembly cost.

Optionally, along the axial direction of the fixed shaft, the shaft portion includes a first end and a second end opposite to each other, the first end of the shaft portion is connected to the connecting portion, and a distance between a first side of the blocking piece close to the shaft portion and the second end of the shaft portion is greater than a length of a portion of the roller contacting the shaft portion. Therefore, gaps are reserved between the two sides of the roller in the axial direction and the head part and the blocking piece respectively, and the roller can rotate freely around the shaft part. Further, after the roller assemblies are installed on the drawer, the rollers cannot rub with the drawer during movement of the drawer due to separation of the rollers and the drawer by separation sheets, and noise reduction is facilitated.

Optionally, the first side of the blocking piece abuts against the step between the connecting portion and the shaft portion. Therefore, the design of the steps is beneficial to ensuring that the blocking pieces are pressed to proper positions, and the blocking pieces are completely positioned relative to the fixed shaft after being pressed in place, so that the blocking pieces, the fixed shaft and the roller can be integrated into a roller assembly.

Drawings

FIG. 1 is a schematic view of a scroll wheel assembly of an embodiment of the present invention;

FIG. 2 is an exploded view of the scroll wheel assembly shown in FIG. 1;

FIG. 3 is a schematic view of the scroll wheel assembly of FIG. 1 in the x-direction;

FIG. 4 is a cross-sectional view along AA of FIG. 3;

FIG. 5 is a schematic view of another roller assembly of an embodiment of the present invention;

FIG. 6 is a cross-sectional view of the roller assembly of FIG. 5 taken in the direction BB;

FIG. 7 is a schematic view of a drawer assembly according to an embodiment of the present invention;

FIG. 8 is an enlarged partial view of area C of FIG. 7;

FIG. 9 is an exploded view of the structure shown in FIG. 8;

FIG. 10 is a cross-sectional view taken along direction DD of FIG. 8;

FIG. 11 is a schematic view of a household appliance in accordance with an embodiment of the present invention;

in the drawings:

1-a roller assembly; 10-a roller; 10 a-a first side of the roller; 10 b-a second side of the roller; 101-a groove; 102-silica gel ring; 103-inner hole; 11-a fixed shaft; 111-shaft portion; 111 a-a first end of the shaft portion; 111 b-a second end of the shaft portion; 112-a head; 112 a-a first end of the head; 112 b-a second end of the head; 113-a connecting portion; 113 a-a first end of the connecting portion; 113 b-a second end of the connecting portion; 114-a step; 115-coupling part; 116-a positioning section; 117-flanging; 118-a projection; 12-a baffle plate; 12 a-a first side of the flap; 12 b-a second side of the flap; 121-via holes; 2-a drawer assembly; 21-a drawer; 211-a mounting portion; 211 a-a first side of the mounting portion; 211 b-a second side of the mounting portion; 212-a via; 22-fixed block; 221-a coupling hole; 3-a household appliance; 31-a track; l1-distance between first side of the flap and the second end of the shaft portion; l2-length of the portion of the roller in contact with the shaft portion; l3-distance between the first side of the flap and the cuff; l4-length of the coupling; l5 — length of coupling hole; l6 — length of lobe; gap-gap; d 1-diameter of the coupling; d 2-outer diameter of the locating section; d 3-diameter of shaft portion; d 4-outer diameter of head; d 5-outer diameter of the connection; d 6-the aperture of the via; x-the axial direction of the fixed axis; r-radial direction of the fixed axis; y-width direction of the drawer; z-the height direction of the drawer.

Detailed Description

As background art says, the existing drawer assembly has the problems that the snap-in part of the roller screw is easy to crack, the roller centering effect is poor, and the like.

To solve the above technical problem, an embodiment of the present invention provides a drawer assembly, including: the drawer is provided with a mounting part, and the mounting part is provided with a through hole; the fixing block is arranged on the first side of the mounting part and is provided with a coupling hole opposite to the through hole; a roller assembly including a roller rotatably fixed to a fixing shaft, and the fixing shaft including a coupling part passing through the through hole from a second side of the mounting part and threadedly coupled with the coupling hole; the fixing shaft includes a positioning portion located in the through hole, the positioning portion having an outer diameter larger than the coupling portion in a radial direction of the fixing shaft, the outer diameter of the positioning portion and the aperture of the through hole being adapted to restrict radial movement of the fixing shaft.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

FIG. 1 is a schematic view of a scroll wheel assembly of an embodiment of the present invention; FIG. 2 is an exploded view of the scroll wheel assembly shown in FIG. 1; FIG. 3 is a schematic view of the scroll wheel assembly of FIG. 1 in the x-direction; fig. 4 is a cross-sectional view along AA of fig. 3.

Specifically, with reference to fig. 1 to 4, the roller assembly 1 of the present embodiment may include: a roller 10; a fixing shaft 11, the fixing shaft 11 may include a shaft portion 111 and a head portion 112 integrally formed with the shaft portion 111 and having an outer diameter larger than that of the shaft portion 111, the roller 10 may be rotatably sleeved on the shaft portion 111, the head portion 112 is located on a first side 10a of the roller 10 along an axial direction (i.e., an x direction) of the fixing shaft 11, and the fixing shaft 11 may include a connecting portion 113 located on a second side 10b of the roller 10; the baffle 12, the baffle 12 can be sleeved on the connecting portion 113 with an interference fit so that the roller 10, the fixed shaft 11 and the baffle 12 form an assembly unit.

Thus, the baffle 12 is in interference fit with the connecting portion 113, so that the roller assembly 1 formed by the roller 10, the fixed shaft 11 and the baffle 12 is in a firm assembly state, and the unexpected separation in the transportation process is avoided. The interference fit connection simplifies the assembly process of the shield plate 12 and the fixing shaft 11, and for example, the shield plate 12 and the fixing shaft 11 can be assembled manually or by using a simple tool. Therefore, the fixed shaft 11 with the head for retaining, the roller 10 and the shutter 12 can be assembled into an assembled unit by a simple assembly process, and the assembled unit is reassembled as a whole to a member to be supported (for example, a storage member such as the drawer 21 shown in fig. 7). After the roller assembly 1 is installed on a component to be supported, the baffle 12 is positioned on the inner side of the roller 10, so that the baffle 12 is not stressed when the roller 10 is stressed axially, and the falling risk of the baffle 12 is reduced. Therefore, it is desirable to obtain a wheel assembly 1 with fewer parts, less assembly difficulty and lower assembly cost.

In one or more embodiments, the flap 12 can be made of a metal material or, alternatively, can be made of a plastic material.

In one or more embodiments, the roller 10 may have a groove 101 in the middle along the x direction, and a silicone ring 102 may be disposed in the area of the groove 101 to achieve a better auxiliary noise reduction effect.

The roller 10 body may be made of plastic material, or both the roller 10 body and the silicone ring 102 may be made of rubber material.

In one or more embodiments, the stationary shaft 11 may be made of a metal material.

In one or more embodiments, the inner diameter of the roller 10 may be slightly larger than the outer diameter of the shaft portion 111, so that a gap exists between the inner hole wall of the roller 10 and the shaft portion 111, ensuring that the roller 10 can freely rotate around the axial direction of the fixed shaft 11.

In one or more embodiments, in the axial direction (x direction) of the fixed shaft 11, the shaft portion 111 may include first and second opposite ends 111a and 111b, the connecting portion 113 may include first and second opposite ends 113a and 113b, the first end 111a of the shaft portion 111 may be connected to the second end 113b of the connecting portion 113, and a distance L1 between the first side 12a of the flap 12 near the shaft portion 111 and the second end 11b of the shaft portion 111 is greater than a length L2 of a portion of the roller 10 in contact with the shaft portion 111. Thus, gaps gap are formed between the head portion 112 and the stopper 12 on both sides of the roller 10 in the axial direction (x direction), and the roller 10 is secured to be rotatable about the shaft portion 111.

Specifically, the movement of the roller 10 in the axial direction (x direction) is limited by the engagement of the flap 12 and the head 112, and since L1 is slightly larger than L2, it is ensured that both sides of the roller 10 do not frequently rub against the flap 12 or the head 112 during pivoting, on the one hand, noise during movement of the roller 10 is reduced, and on the other hand, resistance is reduced to ensure that the roller 10 can freely rotate.

Further, after the roller assembly 1 is installed in the drawer 21, the roller 10 is prevented from rubbing against the drawer 21 during the movement of the drawer 21 due to the separation of the roller 10 and the drawer 21 by the baffle 12, which is beneficial to noise reduction.

In one or more embodiments, the outer diameter d5 of the connecting portion 113 is smaller than the diameter d3 of the shaft portion 111 along the radial direction (shown as r direction) of the fixed shaft 11, a step 114 is formed at the connecting portion of the shaft portion 111 and the connecting portion 113, and the first side 12a of the baffle 12 abuts against the step 114. Therefore, the design of the step 114 is beneficial to ensure that the baffle 12 is pressed and mounted in a proper position, and the baffle 12 is completely positioned relative to the fixed shaft 11 after being pressed and mounted in place, so that the baffle 12, the fixed shaft 11 and the roller 10 can be integrated into the roller assembly 1.

During assembly, the inner hole 103 of the roller 10 may be inserted into the fixed shaft 11 until the first side 10a of the roller 10 abuts against the head 112 of the fixed shaft 11; then, the through hole 121 of the baffle 12 is inserted into the fixing shaft 11, so that the baffle 12 is press-fitted to the first side 12a of the baffle 12 in a small interference fit manner and is abutted against the step 114. At this time, the stopper 12 is fixed to the fixed shaft 11, and the roller 10 is prevented from coming off the fixed shaft 11 in the axial direction (x direction), thereby forming the roller assembly 1. Further, since L1> L2, the roller 10 can freely pivot on the shaft portion 11.

In a modification, the outer diameter d5 of the connecting portion 113 and the diameter d3 of the shaft portion 111 may be the same, and a step 114 protruding from the surface of the fixed shaft 11 in the radial direction r is formed at the junction of the two. The roller 10 can be made of a material with certain deformability, such as rubber, and when assembled, the inner hole 103 of the roller 10 extends into the fixed shaft 11 and is assembled to the shaft 111 across the step 114 with a small amount of external force; the flap 12 is then press fit into the step 114 with a small interference fit. Thus, the roller assembly 1 can be formed as well.

In one or more embodiments, the connection part 113 may include a coupling part 115, the coupling part 115 may have an external thread, and the connection part 113 may include a positioning part 116, and an outer diameter d2 of the positioning part 116 is greater than a diameter d1 of the coupling part 115 in a radial direction r of the fixed shaft 11. Thereby, the flap 12 can be smoothly press-fitted to the positioning portion 116 through the coupling portion 115. Further, the positioning portion 116 does not have an external thread, so that the combination of the baffle 12 and the positioning portion 116 is firmer, and the assembly state of the roller assembly 1 is maintained.

Specifically, the outer diameter d5 of the connecting portion 113 may be the outer diameter d2 of the bit portion 116.

Further, when the roller assembly 1 is mounted to the drawer 21, the diameter d1 of the coupling portion 115 is small, so that the coupling portion 115 can smoothly pass through the mounting hole (such as the through hole 212 shown in fig. 7 to 10) of the drawer 21, and the external thread of the coupling portion 115 is prevented from damaging the mounting hole during mounting.

In one or more embodiments, the head 112 may include a first end 112a and a second end 112b opposite to each other in the axial direction (x direction) of the fixed shaft 11, wherein the first end 112a of the head 112 is connected to the second end 111b of the shaft 111, and the second end 112b of the head 112 is formed with a flange 117. Therefore, the flange 117 prevents the roller 10 from falling off from the fixed shaft 11, which is beneficial to maintaining the assembly state of the roller assembly 1.

In one or more embodiments, the fixing shaft 11 may be a screw having an external thread at least a portion of the coupling portion 113 in the axial direction (x direction) along the axial direction (x direction) of the fixing shaft 11, and the burring 117 may be formed by a screw head. Thereby, the roller 10 can be restrained in place of the screw by the fixing configuration of the screw.

For example, a portion of the screw having an external thread is the coupling portion 115, a portion exposed to the outside except the screw head and the coupling portion 115 after the roller assembly 1 is assembled is the positioning portion 116, and a portion contacting the roller 10 is the shaft portion 111.

In one or more embodiments, the distance L3 between the first side 12a of the flap 12 near the shaft portion 11 and the cuff 117 is greater than the length L2 of the portion of the roller 10 that contacts the shaft portion 111. Accordingly, gaps gap are formed between the roller 10 and the flange 117 and the stopper 12 at both sides in the axial direction, and the roller 10 is ensured to be rotatable around the shaft portion 111.

In one or more embodiments, referring to fig. 2 and 4, the screw may be divided into four sections from right to left in the x-direction: a screw head having a burring 117, a shaft portion 111 contacting the roller 10, a positioning portion 116, and a coupling portion 115 having an external thread.

In particular, the flange 117 may be a flange of the screw head.

Further, the outer diameter of the screw head is the outer diameter d4 of the head 112. Also, the following relationship exists between the outer diameter d4 of the head portion 112, the diameter d3 of the shaft portion 111, the outer diameter d2 of the positioning portion 116, and the diameter d1 of the coupling portion 115: d4> d3> d2> d 1.

Thus, a step 114 may be formed at the connection between the positioning portion 116 and the shaft portion 111, and the flap 12 may be pressed against the step 14 with an interference fit. In the x-direction, the first side 12a of the flap 12 and the cuff 117 cooperate to limit the movement of the roller 10 in the x-direction. Furthermore, since there may be a gap between the first side 10a of the roller 10 and the flange 117, a gap between the second side 10b of the roller 10 and the first side 12a of the flap 12, and a diameter of the inner hole 103 of the roller 10 is slightly larger than the diameter d3 of the shaft 11, the roller 10 may freely and smoothly rotate around the shaft 11.

In one or more embodiments, referring to fig. 1 and 2, the positioning portion 116 may be a cylinder.

In a modification, referring to fig. 5 and 6, the positioning part 116 is a protrusion 118 which is distributed in a segmented manner in the circumferential direction of the connecting part 113, and the sum of the outer diameter d5 of the connecting part 113 and the length L6 of the protrusion 118 is greater than the diameter d1 of the coupling part 115 in the radial direction r of the fixing shaft 116.

Further, in the axial direction (i.e., x-direction), the protrusion 118 may extend to the coupling portion 115 and the step 114.

FIG. 7 is a schematic view of a drawer assembly according to an embodiment of the present invention; FIG. 8 is an enlarged partial view of area C of FIG. 7; FIG. 9 is an exploded view of the structure shown in FIG. 8; fig. 10 is a sectional view taken along direction DD of fig. 8.

Specifically, the drawer assembly 2 of the present embodiment may include: a drawer 21, the drawer 21 being provided with a mounting portion 211, the mounting portion 211 having a through hole 212; a fixing block 22 disposed at the first side 211a of the mounting portion 211 and having a coupling hole 221 opposite to the through hole 212; the roller assembly 1 shown in fig. 1 to 6 includes a roller 10 and a fixing shaft 11, the roller 10 is rotatably fixed to the fixing shaft 11, the fixing shaft 11 includes a coupling portion 115, and the coupling portion 115 passes through the through hole 212 from the second side 211b of the mounting portion 211, then passes through the first side 211a of the mounting portion 211, and is threadedly coupled to the coupling hole 221; the stationary shaft 11 may include a position fixing part 116 located in the through hole 212, the position fixing part 116 may have a larger outer diameter than the coupling part 115 in a radial direction (r direction) of the stationary shaft 11, and an outer diameter d2 of the position fixing part 116 and an aperture d6 of the through hole 212 are adapted to restrict the radial movement of the stationary shaft 11.

Because the coupling part 115 is not directly screwed on the body of the drawer 21, the risk that the body of the drawer 21 is cracked due to screw bite can be effectively avoided, and the service life of the drawer 21 is prolonged. Further, the cooperation of the positioning portion 116 and the through hole 212 can play a centering role to limit the movement of the roller 10 in the radial direction, and optimize the movement effect of the drawer 21. Furthermore, because the installation part 211 is not provided with threads, the roller assembly 1 is in threaded connection with the additionally arranged fixed block 22, when the coupling hole 221 on the fixed block 22 has the sliding teeth, only the fixed block 22 needs to be replaced, the whole drawer 21 does not need to be scrapped, the service life of the drawer 21 is prolonged, and the maintenance cost is reduced.

In one or more embodiments, the mounting portion 211 may be formed with a receiving cavity for receiving the fixing block 22, so that the assembled drawer assembly 2 has an attractive appearance, and the receiving cavity is designed such that the fixing block 22 is not visible to the outside.

In assembly, referring to fig. 9, the fixing block 22 is placed in the receiving cavity adjacent to the first side 211a of the mounting portion 211 with the coupling hole 221 aligned with the through hole 212 of the mounting portion 211; then, the coupling portion 115 of the roller assembly 1 is coupled with the coupling hole 221 after passing through the through hole 212. At this time, the coupled state of the roller assembly 1 and the mounting portion 211 is as shown in fig. 10.

Specifically, the external thread of the coupling portion 115 is screwed with the internal thread of the coupling hole 221, and the second side 12b of the flap 12 abuts against the second side 211b of the mounting portion 211 to restrict the movement of the roller assembly 1 in the axial direction (x direction). Wherein the x-direction may be parallel to the length direction of the drawer 21.

Further, the outer diameter d2 of the positioning portion 116 is matched with the bore diameter d6 of the through hole 212 to limit the movement of the roller assembly 1 in the radial direction r (i.e., the illustrated y direction and z direction).

In one or more embodiments, the inner wall of the through hole 212 is smooth, and the positioning portion 116 is a cylinder. Since no internal thread is provided in the through-hole 212 and the aperture d6 of the through-hole 212 is larger than the outer diameter (also referred to as the diameter of the coupling) d1 of the coupling 115, the through-hole 212 is not damaged by the fixing shaft 11 during assembly. Further, the design of the column facilitates increasing the contact area between the positioning portion 116 and the through hole 212, and disperses the acting force applied to the roller 10 by the drawer 21 while ensuring the radial limiting effect on the roller 10, thereby prolonging the service life of the roller assembly 1.

Further, the drawer 21 can be made of a transparent material, and the through hole 212 with a smooth inner wall can prevent the roller assembly 1 from being directly screwed on the body of the drawer 21 to damage the drawer 21.

In a variation, the mounting portion 211 may be made of a non-transparent material, in which case the fixing block 22 may be omitted, and the through hole 212 may include two through holes: wherein the through-hole having a smaller diameter has an internal thread to be coupled with the coupling part 115; the inner wall of the larger diameter bore is smooth and sized to fit the locating portion 116 for centering.

In one or more embodiments, the length L4 of the coupling part 115 is not less than the length L5 of the coupling hole 221 in the axial direction (i.e., x direction) of the fixing shaft 11, in other words, the length of the external thread of the coupling part 115 is greater than the length of the internal thread of the coupling hole 221, so as to ensure that the fixing shaft 11 is locked with the fixing block 22 and to restrict the movement of the roller 10 in the axial direction (x direction) to optimize the moving effect of the drawer 21.

In one or more embodiments, the roller 10 is sleeved on the shaft 111 and can rotate relative to the shaft 111, and the diameter d3 of the shaft 111 is larger than the outer diameter d2 of the positioning portion 116. Therefore, the shaft 111 cannot extend into the through hole 212, and the roller 10 is prevented from being pressed against the second side 211b of the mounting portion 211 too tightly due to the fixing shaft 11 extending into the fixing block 22 too much, thereby preventing the movement effect of the drawer 21 from being affected.

In one or more embodiments, the second end 116b of the positioning portion 116 is connected to the first end 111a of the shaft portion 111 along the axial direction (i.e., x-direction) of the fixed shaft 11, and a step 114 is formed at the connection. Thus, the step 114 can abut against the second side 211b of the mounting portion 211 to limit the movement of the roller 10 in the axial direction (i.e., the x direction).

For example, the blocking plate 12 of the roller assembly 1 shown in fig. 1 to 6 may be omitted, and the step 114 may directly abut against the second side 211b of the mounting portion 211 when the roller assembly 1 is assembled to the drawer 21, which may also achieve the effect of limiting the movement of the roller 10 in the x direction.

In a variation, the roller assembly 1 may include a blocking piece 12 non-movably sleeved on the positioning portion 116, and the second side 12b of the blocking piece 12 abuts against the second side of the mounting portion 211 along the axial direction (i.e., x direction) of the fixing shaft 11. Thus, the blocking piece 12 is immovably fitted to the positioning portion 116, so that the fixed shaft 11, the roller 10, and the blocking piece 12 can be assembled into an assembled unit by a simple assembly process, and the assembled unit can be reassembled as a whole to a member to be supported (e.g., a storage member such as the drawer 21). Further, after the roller assembly 1 is installed in the drawer 21, the roller 10 and the installation portion 211 are separated by the blocking piece 12, so that the roller 10 is prevented from rubbing against the installation portion 211 to affect the rotation effect. Further, the baffle 12 is positioned inside the roller 10, so that the baffle 12 is not stressed when the roller 10 is subjected to an axial force, and the risk of falling of the baffle 12 is reduced.

In one or more embodiments, the baffle 12 can be sleeved on the positioning portion 116 with an interference fit. The interference fit connection simplifies the assembly process of the shield plate 12 and the fixing shaft 11, and for example, the shield plate 12 and the fixing shaft 11 can be assembled manually or by using a simple tool.

Fig. 11 is a schematic view of a home appliance according to an embodiment of the present invention.

Specifically, the household appliance 3 of the present embodiment may include: the drawer assembly 2 shown in figures 7 to 10 described above; a rail 31 positioned at least one side of the drawer assembly 2, the drawer 21 being supported to the rail 31 by the roller assemblies 1 and adapted to slide along the rail 31. Therefore, the drawer assembly 2 which is firmly formed into a module can be integrally applied to the household appliance 3, the drawer 21 and the roller assembly 1 of the drawer assembly 2 are detachably connected, when the problems of sliding teeth and the like occur, only partial parts in the drawer assembly 2 can be replaced, the whole drawer assembly 2 does not need to be replaced, the service life of the drawer 21 is prolonged, and the maintenance cost is reduced.

Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure, even if only a single embodiment is described with respect to a particular feature. The characteristic examples provided in the present disclosure are intended to be illustrative, not limiting, unless differently expressed. In particular implementations, features from one or more dependent claims may be combined with features of the independent claims and features from respective independent claims may be combined in any appropriate manner and not merely in the specific combinations enumerated in the claims.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A drawer assembly (2), comprising:

a drawer (21), the drawer (21) being provided with a mounting portion (211), the mounting portion (211) having a through hole (212);

a fixing block (22) provided at a first side (211a) of the mounting portion (211) and having a coupling hole (221) opposite to the through hole (212);

a roller assembly (1) including a roller (10) and a fixing shaft (11), the roller (10) being rotatably fixed to the fixing shaft (11), the fixing shaft (11) including a coupling part (115), the coupling part (115) passing through the through-hole (212) from a second side (211b) of the mounting part (211) and being screw-coupled with the coupling hole (221);

the stationary shaft (11) includes a positioning part (116) located within the through hole (212), the positioning part (116) having an outer diameter larger than the coupling part (115) in a radial direction of the stationary shaft (11), an outer diameter (d2) of the positioning part (116) and an aperture (d6) of the through hole (212) being adapted to restrict a radial movement of the stationary shaft (11).

2. A drawer assembly (2) according to claim 1, characterised in that the through hole (212) has a smooth inner wall and the locating portion (116) is a cylinder.

3. The drawer assembly (2) according to claim 1, wherein a length (L4) of the coupling portion (115) is not less than a length (L5) of the coupling hole (221) in an axial direction of the fixing shaft (11).

4. A drawer assembly (2) according to claim 1, characterized in that the fixed shaft (11) further has a shaft portion (111), the roller (10) is sleeved on the shaft portion (111) and can rotate relative to the shaft portion (111), and the diameter (d3) of the shaft portion (111) is larger than the outer diameter (d2) of the positioning portion (116).

5. A drawer assembly (2) according to claim 4, characterised in that the second end (116b) of the detent (116) is connected to the first end (111a) of the shaft (111) in the axial direction of the fixed shaft (11) with a step (114) formed at the connection.

6. The drawer assembly (2) according to claim 1, wherein the roller assembly (1) comprises: the baffle piece (12) is sleeved on the positioning part (116) in a non-movable mode, the baffle piece (12) is provided with a first side (12a) and a second side (12b) which are opposite to each other along the axial direction of the fixed shaft (11), and the second side (12b) of the baffle piece (12) is abutted against the second side (211b) of the mounting part (211).

7. A drawer assembly (2) according to claim 6, characterized in that the first side (12a) of the catch (12) abuts against a step (114) between the detent (116) and a shaft (111), the roller (10) is sleeved on the shaft (111) and can rotate relative to the shaft (111), and the diameter (d3) of the shaft (111) is larger than the outer diameter (d2) of the detent (116).

8. A drawer assembly (2) according to claim 7, characterized in that, in the axial direction of the fixed shaft (11), the distance (L1) between the first side (12a) of the flap (12) and the second end (111b) of the shaft portion (111), which second end (111b) of the shaft portion (111) is the end remote from the flap (12), is greater than the length (L2) of the portion of the roller (10) in contact with the shaft portion (111).

9. A drawer assembly (2) according to claim 6, characterized in that the catch (12) is fitted over the locating portion (116) with an interference fit.

10. A drawer assembly (2) according to claim 1, characterised in that the fixed shaft (11) further has a head portion (112), a first end (112a) of the head portion (112) being connected to a second end (111b) of a shaft portion (111) in the axial direction of the fixed shaft (11), the head portion (112) being formed with a turned-over edge (117), wherein the first end (111a) of the shaft portion (111) is connected to the second end (116b) of the positioning portion (116).

11. A drawer assembly (2) according to claim 10, characterised in that the fixed axle (11) is a screw with an external thread at the coupling (115), the flanging (117) being formed by the head of the screw.

12. A household appliance (3), characterized by comprising:

a drawer assembly (2) according to any one of the preceding claims 1 to 11;

a rail (31) located on at least one side of the drawer assembly (2), the drawer (21) being supported to the rail (31) by the roller assemblies (1) and adapted to slide along the rail (31).