CN219846470U - Guide rail structure for household appliance and household appliance - Google Patents

Abstract

The utility model relates to a guide rail structure for a household appliance and the household appliance, wherein the guide rail structure for the household appliance comprises a wheel shaft, a guide rail and a first roller, and a first gap is reserved between the first roller and a shaft seat; a second gap is reserved between the end face of the second end of the wheel shaft and the opposite inner side wall of the guide rail, and the dimension a of the first gap is smaller than the dimension c of the second gap along the axial direction of the wheel shaft. When c is more than a, the inner side wall of the guide rail is always spaced from the second end face of the wheel shaft, the guide rail is not contacted with the second end face of the wheel shaft all the time, sliding friction between the guide rail and the wheel shaft can be avoided, friction force cannot be increased, sliding smoothness of the guide rail is guaranteed, and user experience is improved.

Description

Guide rail structure for household appliance and household appliance

Technical Field

The utility model belongs to the technical field of household washing, and particularly relates to a guide rail structure for a household appliance and the household appliance.

Background

The present household appliances are cleaning machines or disinfection cabinets and the like, and the cleaning machines generally comprise a box body with a washing chamber and a spraying device arranged in the washing chamber, wherein the spraying device is used for sucking water at the bottom of the box body into a water spraying component and spraying the water into the washing chamber to wash dishes. For placing dishes and the like, a basket is usually provided in the washing chamber, which basket is drawably arranged in the washing chamber.

For example, the Chinese patent publication No. ZL202220648666.8 (issued to the public No. CN 217610969U) discloses an upper bowl rack of a dish washer with a handle, which comprises a bowl rack main body with an upper opening, a guide rail, a front end cover, a rear end cover, a supporting wheel assembly and a guide sheave assembly, wherein the guide rail is provided with a movable cavity, two ends of the guide rail are open, through holes along the length direction are formed in a side wall plate of the movable cavity, and a top plate and a bottom plate of the movable cavity are arc-shaped; the front end cover comprises a front pin body and a driven plate arranged at the upper end, and the rear end cover comprises a rear pin body; the supporting wheel assembly comprises a rolling wheel, a shaft body and a fixed seat, the shaft body is fixed with the fixed seat, and the rolling wheel is pivoted with a shaft head of the shaft body; the guide sheave assembly comprises a grooved wheel, a wheel seat and a wheel seat frame, the wheel seat comprises a hollow shaft sleeve, a clasp and a connecting seat which are arranged at the suspension end of the hollow shaft sleeve, the wheel seat frame comprises a vertical rod and a horizontal rod, the hollow shaft sleeve penetrates through a shaft hole of the grooved wheel, the clasp is buckled with the end face of the shaft hole, the horizontal rod is inserted into the hollow shaft sleeve, and the vertical rod is fixed with the connecting seat; the upper part and the lower part of the bowl rack main body are respectively provided with a plurality of guide roller assemblies, the upright rods of the guide sheave assemblies at the upper part are fixed with the square frames at the upper part, the upright rods of the guide sheave assemblies at the lower part are fixed with the square frames at the lower part, and the top and the bottom of the guide rail are respectively matched with the groove wheels; the front end cover and the rear end cover are respectively inserted into the front end and the rear end of the guide rail; the groove-shaped wheel at the front part of the upper part drives the driven plate and the guide rail moves, the rolling wheel of the supporting wheel assembly is arranged in the movable cavity, and the shaft body and the through hole extend out. The bowl rack main body moves forwards, the guide rail is in sliding fit with the rolling wheel, and the bowl rack main body and the guide rail move forwards together until the bowl rack main body extends out of the liner.

Although a gap is reserved between the outer side wall of the rolling wheel (or the rolling wheel) and the outer periphery of the shaft body (the wheel shaft), the rolling friction at the rolling wheel part is sometimes changed into sliding friction due to insufficient gap reserved between the end wall of the shaft body and the corresponding inner wall of the sliding rail movable cavity, and at the moment, the friction force is increased, the sliding is not smooth, and the experience is poor.

Accordingly, there is a need for further improvements to existing rail structures.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a guide rail structure for a household appliance, which prevents a guide rail from contacting with a wheel shaft to achieve the purpose of enabling the guide rail to slide smoothly all the time, aiming at the current state of the art.

The second technical problem to be solved by the utility model is to provide the household appliance with the guide rail structure.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a guide rail structure for a home appliance for guiding movement of a movable member in the home appliance, comprising:

a wheel axle, the first end of which is used for being installed on the side wall of the household appliance and extends along the wall thickness of the side wall, and a shaft seat is relatively fixed on the peripheral wall of the wheel axle adjacent to the first end;

the guide rail is used for being fixed on a movable part in the household appliance and extending along the moving direction of the movable part, a guide channel extending along the length direction of the guide rail is formed in the guide rail, a guide groove extending along the length direction of the guide rail and opening towards the shaft seat is formed in the side wall of the guide rail, so that the guide rail has a C-shaped cross section, and the wheel shaft penetrates through the guide groove and is positioned in the hollow part of the guide rail;

the first roller is rotationally restrained on the second end of the wheel shaft, is at least partially positioned in the guide channel and is in guide fit with the guide channel, and a first gap is reserved between the first roller and the shaft seat;

the method is characterized in that: a second gap is reserved between the end face of the second end of the wheel shaft and the opposite inner side wall of the guide rail, and the dimension a of the first gap is smaller than the dimension c of the second gap along the axial direction of the wheel shaft.

In order to prevent the roller from rollover in the rolling process, the first roller comprises a roller body, the roller body is positioned in the guide channel, the thickness of the roller body along the length direction of the wheel shaft is d, a first extension part is formed by extending the peripheral wall of the roller body towards the direction away from the shaft seat, the distance between the end face of the first extension part and the end wall of the roller body towards the wheel shaft is e, and the distance e and the thickness d are as follows: e > d/2.

In order to avoid abnormal noise generated by friction between the end part of the first roller and the first extension part of the first roller and to avoid friction increase, the second end of the wheel shaft is provided with an end part with an enlarged area, and a third gap is reserved between the end part and the first extension part.

In order to provide a movable amount for the left-right movement of the guide rail, the dimension b and the dimension a of the third gap along the axial direction of the wheel axle satisfy: a+b is less than or equal to 1mm and less than or equal to 3mm. In addition, the change of the sizes of the box body and the bowl rack is met to a certain extent.

Preferably, the inner peripheral wall of the roller body extends towards the shaft seat to form a second extension part, and the end face of the second extension part and the shaft seat form the first gap therebetween. In addition, the first gap can be formed between the roller body and the shaft seat.

Preferably, the second extension part partially penetrates the guide groove.

In order to reduce the possible contact area between the first roller and the shaft seat, reduce friction force and improve smoothness, the free end of the second extension part is provided with a reduced section, the cross section area of the reduced section gradually reduces towards the shaft seat direction, and the end face of the reduced section is the end face of the second extension part.

The structure of the shrinking section is various, and the shrinking section can adopt a mode of inclining only the outer peripheral wall, a mode of inclining only the inner peripheral wall and other modes, but preferably, the outer peripheral wall of the shrinking section is a first inclined wall gradually inclining towards the shaft seat direction from outside to inside, and the inner peripheral wall of the shrinking section is a second inclined wall gradually inclining towards the shaft seat direction from inside to outside.

The axle seat may be formed on the axle or removably mounted on the axle, but preferably the axle has a non-circular cross-section at a first end thereof, the axle seat having a bore matching the first end of the axle, the first end of the axle being inserted into the bore.

In order to realize the fixation of the wheel axle and the household appliance, the side wall of the household appliance where the wheel axle is located is a first side wall, and the household appliance further comprises a screw and a mounting plate connected with the outer wall surface of the first side wall, wherein screw holes for the screw to pass through are correspondingly formed in the mounting plate and the wheel axle.

In order to improve the smoothness of the movement of the guide rail, two first rollers are arranged at intervals along the length direction of the guide rail.

In order to further improve the smoothness of the movement of the guide rail, the guide rail further comprises a second roller and a third roller, wherein the second roller is arranged on the same side as the first roller, the third roller is arranged below the second roller, the second roller and the third roller are both arranged at the corresponding positions of the movable piece, the guide rail is arranged between the second roller and the third roller, the second roller is in guiding fit with the upper surface of the guide rail, and the third roller is in guiding fit with the lower surface of the guide rail.

Specifically, the dimension c > (a+0.5) mm. Thus, the second end surfaces of the guide rail and the wheel axle are not contacted, and the problems of increased resistance or abnormal noise caused by friction can be further prevented.

In order to avoid abnormal sounds generated by friction between the first part and the second part of the guide rail and the first roller and increase friction force, the guide groove is positioned on a first wall plate of the guide rail, the first part of the first wall plate positioned above the guide groove gradually inclines towards the shaft seat direction from top to bottom, and the second part of the first wall plate positioned below the guide groove gradually inclines towards the shaft seat direction from bottom to top. Thus, the user experience is improved.

The utility model solves the second technical problem by adopting the technical proposal that: the household appliance comprises a box body with a cavity, a guide rail structure and a movable piece, wherein the movable piece is arranged in the cavity and can move relative to the box body, the movable piece is a bowl basket, the guide rail structure is the guide rail structure, and at least one of the left side and the right side of the bowl basket is provided with the guide rail.

In order to improve the smoothness of the bowl basket movement, the guide rail structures are divided into two groups and are arranged at intervals along the left-right direction.

The front side of the case may be opened, or the top of the case may be opened, but preferably the front side of the case is opened, and the guide rail extends in the front-rear direction.

In order to realize the tightness of the shaft seat and the side wall of the household appliance, the first end of the wheel shaft is sleeved with a sealing ring, and the sealing ring is positioned between the side wall of the household appliance and the shaft seat to realize the sealing of the shaft seat and the shaft seat.

The household appliance may be a disinfection cabinet or a washing machine, but preferably the household appliance is a washing machine.

Compared with the prior art, the utility model has the advantages that: the existence of first clearance and second clearance can be along the axial motion of this shaft relatively to the shaft at the in-process that the guide rail removed, because the shaft is motionless relatively to domestic appliance, when c > a, have the interval all the time between guide rail inside wall and the shaft second terminal surface, do not contact all the time between guide rail and the shaft second terminal surface, can avoid taking place sliding friction between guide rail and the shaft, frictional force can not grow, guarantees that the guide rail push-and-pull is smooth, improves user experience.

Drawings

Fig. 1 is a schematic view of a part of the structure of a cleaning machine according to the present embodiment;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is another angular cross-sectional view of FIG. 1;

FIG. 4 is a schematic view of the axle of FIG. 1;

fig. 5 is a schematic structural diagram of the axle seat in fig. 1.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

The household appliance is a washer for washing dishes or fruits and vegetables. As shown in fig. 1 to 3, the washing machine of the present embodiment is a dishwasher. The aforementioned washing machine comprises a casing 9, a rail structure and a movable member arranged to be movable relative to the casing 9. Wherein the interior of the box 9 has a chamber 90 and the front side of the box 9 is open. The movable parts are bowl baskets 92, the left and right sides of the bowl baskets 92 are respectively restrained on the corresponding side walls of the chamber 90 through guide rail structures, and can be pulled back and forth, so that the guide rail structures are two groups and are arranged at intervals along the left and right directions. The two sets of guide rail structures have the same structure, and one set of guide rail structures is taken as an example in the embodiment.

As shown in fig. 2 and 3, the rail structure includes an axle 1, a rail 2, a first roller 3, a screw 03, a mounting plate 6, a second roller 7, and a third roller 8. Wherein, the first end of the wheel axle 1 is installed on the corresponding side walls of the left and right side walls of the box 9, and the side wall of the box 9 on which the wheel axle 1 is installed is the first side wall 91. The wheel axle 1 extends along the wall thickness of the first side wall 91, i.e., in the left-right direction. In order to connect the wheel axle 1 and the first side wall 91, the mounting plate 6 is mounted on the outer wall surface of the first side wall 91, the mounting plate 6 and the wheel axle 1 are correspondingly provided with screw holes 01 for screws 03 to pass through, and the screws 03 pass through the screw holes 01 of the mounting plate 6 and the wheel axle 1 to lock the mounting plate 6 and the wheel axle 1 on the first side wall 91. In addition, the axle 1 is relatively fixed to the outer peripheral wall adjacent to the first end 10, specifically, as shown in fig. 4, the cross section of the first end 10 of the axle 1 is non-circular, as shown in fig. 5, the axle 11 has a through hole 111 matching with the first end 10 of the axle 1, as shown in fig. 3, the first end 10 of the axle 1 is inserted into the through hole 111, so as to achieve the relative fixation of the axle 1 and the axle 11.

As shown in fig. 2 and 3, the guide rail 2 is fixed to a side wall of the corresponding side of the bowl basket 92, and extends along the moving direction of the bowl basket 92 (i.e., extends in the front-rear direction). The guide rail 2 has a hollow guide channel 21 extending along a length direction thereof, and a guide groove 211 extending along the length direction thereof and opening toward the shaft seat is formed in a side wall of the guide rail 2, so that the guide rail 2 has a C-shaped cross section. The second end 12 of the axle 1 is threaded through the guide slot 211 to be located in the guide channel 21 of the rail 2, i.e. the axle seat 11 is located between the rail 2 and the first side wall 91 of the corresponding side. In addition, the first portion and the second portion of the guide rail are prevented from generating abnormal noise due to friction with the first roller and increasing friction force, the guide groove 211 is positioned on the first wall plate of the guide rail 2, the first portion 221 of the first wall plate positioned above the guide groove 211 is gradually inclined towards the shaft seat 11 from top to bottom, and the second portion 222 of the first wall plate positioned below the guide groove 211 is gradually inclined towards the shaft seat 11 from bottom to top. The first end 1010 of the wheel axle 1 is sleeved with a sealing ring 02, and the sealing ring 02 is positioned between the first side wall 91 of the corresponding side and the shaft seat 11 to realize sealing of the two.

As shown in fig. 2 and 3, there are two first rollers 3, which are arranged at intervals along the length direction of the guide rail 2. The two first rollers 3 have the same structure, and one of the first rollers 3 will be described as an example. The first roller 3 is rotationally restrained on the second end 12 of the wheel axle 1, is partially positioned in the guide channel 21 and is in guide fit with the guide channel 21, and a first gap 4 is reserved between the first roller and the shaft seat 11; specifically, the first roller 3 includes a roller body 31, a first extension portion 32, and a second extension portion 33. The roller body 31 is located in the guide channel 21, the inner peripheral wall of the roller body 31 extends towards the shaft seat 11 to form the second extending portion 33, the second extending portion 33 partially penetrates out of the guide groove 211, and a first gap 4 is formed between the end surface of the second extending portion 33 and the shaft seat 11. Specifically, in order to reduce the possible contact area between the first roller and the axle seat, reduce the friction force and improve the smoothness, the free end of the second extension portion 33 has a reduced section 331, the cross-sectional area of the reduced section 331 gradually decreases toward the axle seat 11, and the end face of the reduced section 331 is the end face of the second extension portion 33. In the present embodiment, the outer peripheral wall of the reduced section 331 is a first inclined wall 3311 gradually inclined from outside to inside toward the shaft seat 11, and the inner peripheral wall of the reduced section 331 is a second inclined wall 3312 gradually inclined from inside to outside toward the shaft seat 11. In addition, a second gap 5 is left between the end face of the second end 12 of the wheel axle 1 and the inner side wall of the guide rail 2 opposite to the end face, and the dimension a of the first gap 4 is smaller than the dimension c of the second gap 5 along the axial direction of the wheel axle 1. Specifically, the dimension c > (a+0.5) mm.

Because the guide rail and the first roller can move along the axial direction of the wheel shaft relative to the wheel shaft, if c is less than or equal to a, when the guide rail and the first roller move axially, the clearance size c becomes 0 first, and a is more than 0, when the guide rail is pulled, sliding friction occurs between the inner side wall of the guide rail and the end face of the second end of the wheel shaft, so that friction force is increased, and sliding is influenced; when a is smaller than c, the condition that a is changed into 0 first and c is larger than 0 occurs, and at the moment, the end faces of the second ends of the guide rail and the wheel shaft are not contacted, so that sliding friction of the second ends of the guide rail and the wheel shaft can be avoided, and sliding smoothness of the guide rail is ensured.

As shown in fig. 2, the thickness d of the roller body 31 along the length direction of the wheel axle 1 is d, the inner peripheral wall of the roller body 31 extends away from the axle seat 11 to form a first extension portion 32, the distance e between the end surface of the first extension portion 32 and the end wall of the roller body 31 facing the wheel axle 1 is e, and the distance e and the thickness d satisfy: e > d/2. The second end 12 of the axle 1 has an enlarged area end 121, and a third gap 13 is left between the end 121 and the first extension 32 in order to avoid abnormal noise caused by friction between the end of the first roller 3 and the first extension of the first roller and to avoid increased friction. Along the axial direction of the wheel axle 1, the dimensions b and a of the third gap 13 satisfy: a+b is less than or equal to 1mm and less than or equal to 3mm.

In order to improve the smoothness of the bowl basket movement, as shown in fig. 1, the second roller 7 and the third roller 8 are installed at the corresponding positions of the bowl basket 92, the third roller 8 is located below the second roller 7, the guide rail 2 is located between the second roller 7 and the third roller 8, the second roller 7 is in guiding engagement with the upper surface of the guide rail 2, and the third roller 8 is in guiding engagement with the lower surface of the guide rail 2.

Claims (19)

1. A guide rail structure for a home appliance for guiding movement of a movable member in the home appliance, comprising:

a wheel axle (1) with a first end (10) for being relatively fixed on a side wall of the household appliance and extending along the wall thickness of the side wall, and a shaft seat (11) relatively fixed on the peripheral wall of the wheel axle (1) adjacent to the first end (10);

the guide rail (2) is used for being fixed on a movable part in the household appliance and extending along the moving direction of the movable part, a guide channel (21) extending along the length direction of the guide rail is formed in the hollow inside of the guide rail (2), a guide groove (211) extending along the length direction of the guide rail (2) and opening towards the shaft seat (11) is formed in the side wall of the guide rail (2), so that the guide groove has a C-shaped cross section, and the second end (12) of the wheel shaft (1) penetrates through the guide groove (211) and is positioned in the guide channel (21) of the guide rail (2);

a first roller (3) which is rotatably constrained to the second end (12) of the axle (1) and is at least partially positioned in the guide channel (21) and is in guide engagement with the guide channel (21), leaving a first gap (4) between itself and the axle seat (11);

the method is characterized in that: a second gap (5) is reserved between the end face of the second end (12) of the wheel shaft (1) and the opposite inner side wall of the guide rail (2), and the dimension a of the first gap (4) is smaller than the dimension c of the second gap (5) along the axial direction of the wheel shaft (1).

2. The guide rail structure according to claim 1, wherein: the first roller (3) comprises a roller body (31), the roller body (31) is positioned in the guide channel (21), the thickness of the roller body (31) along the length direction of the wheel shaft (1) is d, a first extension part (32) is formed by extending the inner peripheral wall of the roller body (31) towards the direction away from the shaft seat (11), the distance between the end face of the first extension part (32) and the end wall of the roller body (31) towards the wheel shaft (1) is e, and the distance e and the thickness d are as follows: e > d/2.

3. The guide rail structure according to claim 2, wherein: the second end (12) of the axle (1) has an enlarged area end (121), said end (121) leaving a third gap (13) between the first extension (32).

4. A guide rail structure according to claim 3, wherein: along the axial direction of the wheel axle (1), the dimensions b and a of the third gap (13) satisfy: a+b is less than or equal to 1mm and less than or equal to 3mm.

5. The guide rail structure according to claim 2, wherein: the inner peripheral wall of the roller body (31) extends towards the shaft seat (11) to form a second extension part (33), and the first gap (4) is formed between the end face of the second extension part (33) and the shaft seat (11).

6. The guide rail structure of claim 5, wherein: the second extension (33) partially penetrates the guide groove (211).

7. The guide rail structure of claim 5, wherein: the free end of the second extension part (33) is provided with a reduced section (331), the cross-sectional area of the reduced section (331) gradually decreases towards the shaft seat (11), and the end face of the reduced section (331) is the end face of the second extension part (33).

8. The guide rail structure of claim 7, wherein: the outer peripheral wall of the shrinking section (331) is a first inclined wall (3311) which gradually inclines towards the shaft seat (11) from outside to inside, and the inner peripheral wall of the shrinking section (331) is a second inclined wall (3312) which gradually inclines towards the shaft seat (11) from inside to outside.

9. The guide rail structure according to claim 1, wherein: the cross section of the first end (10) of the wheel axle (1) is non-circular, the shaft seat (11) is provided with a through hole (111) matched with the first end (10) of the wheel axle (1), and the first end (10) of the wheel axle (1) is inserted into the through hole (111).

10. The guide rail structure according to claim 1, wherein: the side wall of the household appliance where the wheel axle (1) is located is a first side wall (91), the household appliance further comprises a screw (03) and a mounting plate (6) connected with the outer wall surface of the first side wall (91), and the mounting plate (6) and the wheel axle (1) are correspondingly provided with screw holes (01) through which the screw (03) passes.

11. The guide rail structure according to claim 1, wherein: the number of the first rollers (3) is two, and the first rollers are arranged at intervals along the length direction of the guide rail (2).

12. The guide rail structure according to claim 1, wherein: the novel roller is characterized by further comprising a second roller (7) and a third roller (8), wherein the second roller (7) is arranged on the same side as the first roller (3), the third roller (8) is arranged below the second roller (7), the second roller (7) and the third roller (8) are both arranged at the corresponding positions of the movable piece, the guide rail (2) is arranged between the second roller (7) and the third roller (8), the second roller (7) is in guiding fit with the upper surface of the guide rail (2), and the third roller (8) is in guiding fit with the lower surface of the guide rail (2).

13. The guide rail structure according to claim 1, wherein: the dimension c > (a+0.5) mm.

14. The guide rail structure according to any one of claims 1 to 13, characterized in that: the guide groove (211) is positioned on a first wall plate of the guide rail (2), a first part (221) of the first wall plate positioned above the guide groove (211) gradually inclines towards the shaft seat (11) from top to bottom, and a second part (222) of the first wall plate positioned below the guide groove (211) gradually inclines towards the shaft seat (11) from bottom to top.

15. Household appliance comprising a casing (9) having a chamber (90) inside, a guide structure and a mobile element located inside the chamber (90) and arranged so as to be movable with respect to the casing (9), the mobile element being a bowl basket (92), characterized in that: the guide rail structure is the guide rail structure of any one of claims 1 to 14, and at least one of the left and right sides of the bowl basket (92) is provided with the guide rail (2).

16. A household appliance as in claim 15, wherein: the guide rail structures are arranged in two groups at intervals along the left-right direction.

17. A household appliance as in claim 15, wherein: the front side of the box body (9) is open, and the guide rail (2) extends along the front-rear direction.

18. A household appliance as in claim 15, wherein: the first end (10) of the wheel shaft (1) is sleeved with a sealing ring (02), and the sealing ring (02) is positioned between the side wall of the household appliance and the shaft seat (11) to realize sealing of the two.

19. A household appliance as in claim 15, wherein: the household appliance is a cleaning machine.