Household appliance

Abstract

The utility model relates to a household appliance which comprises a box body with an opening in the front side. The guide rail extends in the front-and-back direction and can move front and back to enter and exit from the box body, and a guide groove extending in the front-and-back direction is formed in the guide rail; the roller assembly comprises a wheel shaft which is relatively fixed in the box body and extends in the left-right direction; the rolling wheel is embedded in the guide groove, can generate relative displacement with the guide rail in the front-back direction, and is arranged on the wheel shaft in a sleeving manner and can rotate around the axis of the wheel shaft; an inner sleeve arranged on the wheel shaft in a sleeving mode is further arranged between the wheel shaft and the rolling wheel, a plurality of rolling balls capable of rotating are arranged between the inner sleeve and the rolling wheel, and the rolling balls are arranged in the circumferential direction of the inner sleeve at intervals. The guide rail moves smoothly.

Description

Technical Field

[0001] The utility model relates to a household appliance. Background Art

[0002] Household appliances such as washing machines and disinfection cabinets have greatly facilitated people's lives. In the prior art, household appliances have an inner cavity, which contains a dish rack for placing tableware. To facilitate placing and removing tableware from the dish rack, the dish rack needs to be able to be pulled back and forth.

[0003] For example, in the Chinese utility model patent application CN202321296206.4 (publication number CN219846471U), entitled "A Guide Rail Structure for Household Appliances and Household Appliances," the guide rail structure includes an axle, a guide rail, and a roller. Along the axial extension direction of the axle, the longitudinal cross-section of each portion of the outer peripheral wall of the roller has a straight section, and a first D-shaped gap is formed between the straight section and the corresponding position of the inner peripheral wall of the guide rail. The presence of the first gap reduces the contact area between the outer peripheral wall of the roller and the inner peripheral wall of the guide rail, thereby reducing the friction between the two, resulting in smoother and more labor-saving pushing and pulling of the guide rail, satisfying the user experience.

[0004] This patent reduces the contact area between the outer wall of the roller and the inner wall of the guide rail to make the push and pull of the guide rail smooth, but whether it is possible to make the guide rail move smoothly through other means needs further research. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a household appliance which can reduce friction and make the guide rail move smoothly in response to the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a household appliance comprising

[0007] Box, open front;

[0008] A guide rail extending in the front-to-back direction and capable of moving forward and backward to enter and exit the box body, the guide rail having a guide groove extending in the front-to-back direction;

[0009] Roller assembly, including

[0010] The wheel axle is relatively fixed in the box and extends in the left and right directions;

[0011] A roller is embedded in the guide groove and can generate relative displacement with the guide rail in the front-back direction. The roller is sleeved on the wheel axle and can rotate around the axis of the wheel axle;

[0012] The invention is characterized in that an inner sleeve is provided between the wheel axle and the roller, and a rotatable ball is provided between the inner sleeve and the roller. There are a plurality of balls and the balls are arranged at intervals along the circumference of the inner sleeve.

[0013] In order to position the ball, a first arc-shaped groove is provided on the outer peripheral wall of the inner sleeve, which is recessed toward the axis of the wheel axle, and a second arc-shaped groove is provided on the inner peripheral wall of the roller, which is arched away from the axis of the wheel axle. The first arc-shaped groove is for partially embedding the ball, and the second arc-shaped groove is for partially embedding the ball.

[0014] Preferably, the radius of the first arcuate groove is R1, the radius of the ball is r, R1>r, and the center of the first arcuate groove is located outside the center of the ball, so that the contact area between the ball and the first arcuate groove is small, reducing rotational friction.

[0015] Preferably, the radius of the second arcuate groove is R2, the radius of the ball is r, R2>r, and the center of the second arcuate groove is located inside the center of the ball. In this way, the contact area between the ball and the second arcuate groove is small, reducing rotational friction.

[0016] Preferably, a positioning sleeve is provided between the inner sleeve and the roller. The centerline of the positioning sleeve aligns with the axis of the wheel axle, and the positioning sleeve is fixed relative to the roller. The positioning sleeve is provided with a plurality of positioning holes along its circumference, into which the balls are placed in a one-to-one correspondence. The positioning sleeve evenly separates the balls, ensuring smooth rotation of the roller, and serves to position the balls, preventing them from straying from the roller or inner sleeve and affecting the normal rotation of the roller assembly.

[0017] In order to fix the positioning sleeve relative to the roller, the positioning sleeve can be welded to the roller, or a circle of ribs can be provided on the outer peripheral wall of the positioning sleeve, and when the positioning sleeve is located between the roller and the inner sleeve, the ribs have an interference fit with the inner peripheral wall of the roller; or a circle of ribs can be provided on the inner peripheral wall of the roller, and when the positioning sleeve is located between the roller and the inner sleeve, the ribs have an interference fit with the roller.

[0018] Preferably, each of the positioning holes passes through the end wall of one end of the positioning sleeve to form an entrance, and the ball enters the positioning hole from the entrance, and the entrance of the positioning hole is a cone with a gradually decreasing diameter along the direction in which the ball enters the positioning hole. The cone-shaped structure serves as a guide, making it easier to place the ball in the corresponding positioning hole.

[0019] In the above solution, a bowl rack is provided in the box body, and the bowl rack can be relatively fixed relative to the guide rail in the front-to-back direction, and the guide rail plays a guiding role for the bowl rack.

[0020] In order to allow the bowl rack to have a larger moving range and be able to move outside the box, a rotatable sliding member is provided above and / or below the guide rail, the rotation axis of the sliding member extends in the left and right directions, and the sliding member slides in cooperation with the guide rail. The sliding member is installed on the bowl rack, and both ends of the guide rail are provided with a positioning portion that can resist the sliding member.

[0021] The household appliance may be a disinfection cabinet, or may be a washing machine capable of washing tableware and / or fruits and vegetables.

[0022] Compared with the prior art, the advantages of the present invention are as follows: the present invention provides an inner sleeve and balls, so that when the guide rail moves, the roller rotates, and rolling friction is formed between the roller and the inner sleeve through the balls, and the friction force is small, so that the rotation of the roller is smoother, and the friction force between the roller and the guide rail is reduced, so that the guide rail can slide smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 sectional view of

[0025] Figure 3 for Figure 2 A magnified view of point A;

[0026] Figure 4 for Figure 3 A schematic structural diagram of the positioning sleeve in FIG.

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the bowl rack, guide rails, slides and roller components. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 5 As shown, the household appliance of this preferred embodiment is a washing machine capable of washing dishes and / or fruits and vegetables. Of course, the household appliance can also be a disinfection cabinet.

[0030] The household appliance comprises a housing 1 , a bowl rack 2 , a guide rail 3 and a roller assembly 4 .

[0031] The front of the housing 1 is open, and the guide rail 3 extends in the front-to-back direction. The guide rail 3 and the dish rack 2 can both move forward and backward to enter and exit the housing 1. Sliders 21 are provided above and / or below the guide rail 3. The sliders 21 are rotatably mounted on the dish rack 2. The rotation axis of the slide 21 extends in the left-right direction, and the slide 21 and the guide rail 3 are slidably engaged. Both ends of the guide rail 3 are provided with positioning portions 31 that can abut against the slide 21. In this embodiment, the slides 21 are wheels.

[0032] When the slider 21 is not in contact with the positioning portion 31, the slider 21 slides along the guide rail 3. In this case, the guide rail 3 does not move, and only the dish rack 2 moves. When the slider 21 is in contact with the positioning portion 31, the slider 21 and the guide rail 3 are relatively fixed in the forward or backward direction. In this case, the guide rail 3 and the dish rack 2 move synchronously, and the dish rack 2 is relatively fixed in the front-to-back direction relative to the guide rail 3. This coordination between the guide rail 3 and the dish rack 2 allows the dish rack 2 to have a longer travel range.

[0033] The roller assembly 4 includes an axle 41, a roller 42, an inner sleeve 43, a ball 44 and a positioning sleeve 45. Guide rails 3 and roller assemblies 4 are provided on both sides of the bowl rack 2, and sliding parts 21 that can slide with the guide rails 3 are provided on both sides of the bowl rack 2.

[0034] The side wall of the box body 1 is provided with a perforation, one end of the axle 41 passes through the perforation of the box body 1 and is connected to the screw 46. The box body 1 is provided with a reinforcement plate 47 at the perforation. Preferably, the outer wall and the inner wall of the box body 1 are both provided with a reinforcement plate 47.

[0035] The guide rail 3 has a guide groove 32 extending in the front-to-back direction. A roller 42 is embedded in the guide groove 32 and can move relative to the guide rail 3 in the front-to-back direction. The roller 42 is mounted on the axle 41 and can rotate about the axis of the axle 41. The ends of the guide groove 32 are closed to limit the travel of the guide rail 3. As the roller 42 rotates about the axle 41, the guide rail 3 moves back and forth, and the friction between the roller 42 and the axle 41 is relatively low.

[0036] An inner sleeve 43 is provided between the axle 41 and the roller 42 , and a rotatable ball 44 is provided between the inner sleeve 43 and the roller 42 . There are a plurality of balls 44 , which are spaced apart along the circumference of the inner sleeve 43 .

[0037] Specifically, a positioning sleeve 45 is provided between the inner sleeve 43 and the roller 42. The centerline of the positioning sleeve 45 is aligned with the axis of the axle 41, and the positioning sleeve 45 is fixed relative to the roller 42. The positioning sleeve 45 is provided with a plurality of positioning holes 451 along its circumference, into which the balls 44 are placed in a one-to-one correspondence. Each positioning hole 451 passes through the end wall of one end of the positioning sleeve 45 to form an entrance 452. The balls 44 enter the positioning holes 451 through the entrance 452. The entrance 452 of the positioning holes 451 is tapered in shape, gradually decreasing in diameter as the balls 44 enter the positioning holes 451. The tapered structure serves as a guide, facilitating the placement of the balls 44 in the corresponding positioning holes 451. The positioning sleeve 45 evenly separates the balls 44, ensuring smooth rotation of the roller 42. It also positions the balls 44, preventing them from deviating from the roller 42 or the inner sleeve 43 and affecting the normal rotation of the roller assembly 4.

[0038] The positioning sleeve 45 and the roller 42 can be welded together, or a circle of ribs 453 can be provided on the outer peripheral wall of the positioning sleeve 45, and the ribs 453 are preferably flexible parts. When the positioning sleeve 45 is located between the roller 42 and the inner sleeve 43, the ribs 453 have an interference fit with the inner peripheral wall of the roller 42; or a circle of ribs 453 can be provided on the inner peripheral wall of the roller 42, and when the positioning sleeve 45 is located between the roller 42 and the inner sleeve 43, the ribs 453 have an interference fit with the roller 42.

[0039] A first arcuate groove 431 is provided on the outer peripheral wall of the inner sleeve 43 and is recessed toward the axis of the wheel shaft 41. A second arcuate groove 421 is provided on the inner peripheral wall of the roller 42 and is arched away from the axis of the wheel shaft 41. The first arcuate groove 431 is partially embedded in the ball 44, and the second arcuate groove 421 is partially embedded in the ball 44.

[0040] The radius of the first arcuate groove 431 is R1, and the radius of the ball 44 is r, where R1>r. The center of the first arcuate groove 431 is located outside the center of the ball 44, where "outside" refers to a direction away from the axis of the axle 41. This reduces the contact area between the ball 44 and the first arcuate groove 431, thereby reducing rotational friction.

[0041] The radius of the second arcuate groove 421 is R2, and the radius of the ball 44 is r, where R2>r. The center of the second arcuate groove 421 is located inside the center of the ball 44, where "inside" refers to the direction close to the axis of the axle 41. This reduces the contact area between the ball 44 and the second arcuate groove 421, reducing rotational friction.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A household appliance comprising The box body (1) is open at the front; A guide rail (3) extends in a front-to-back direction and can move forward and backward to enter and exit the box (1), and the guide rail (3) has a guide groove (32) extending in the front-to-back direction; Roller assembly (4), including A wheel axle (41) is relatively fixedly located in the box (1) and extends in the left-right direction; A roller (42) is embedded in the guide groove (32) and can generate relative displacement with the guide rail (3) in the front-rear direction. The roller (42) is sleeved on the wheel shaft (41) and can rotate around the axis of the wheel shaft (41); It is characterized by: An inner sleeve (43) sleeved on the wheel axle (41) is provided between the wheel axle (41) and the roller (42). Rotatable balls (44) are provided between the inner sleeve (43) and the roller (42). There are a plurality of balls (44) arranged at intervals along the circumference of the inner sleeve (43).

2. The household appliance according to claim 1, wherein: The outer peripheral wall of the inner sleeve (43) is provided with a first arc-shaped groove (431) that is recessed toward the axis of the wheel shaft (41); the inner peripheral wall of the roller (42) is provided with a second arc-shaped groove (421) that is arched away from the axis of the wheel shaft (41); the first arc-shaped groove (431) is for partially embedding the ball (44); and the second arc-shaped groove (421) is for partially embedding the ball (44).

3. The household appliance according to claim 2, wherein: The radius of the first arc-shaped groove (431) is R1, the radius of the ball (44) is r, R1>r, and the center of the first arc-shaped groove (431) is located outside the center of the ball (44).

4. The household appliance according to claim 2, wherein: The radius of the second arc-shaped groove (421) is R2, the radius of the ball (44) is r, R2>r, and the center of the second arc-shaped groove (421) is located inside the center of the ball (44).

5. The household appliance according to any one of claims 1 to 4, characterized in that: A positioning sleeve (45) is further provided between the inner sleeve (43) and the roller (42). The center line of the positioning sleeve (45) is in the same direction as the axis of the wheel shaft (41). The positioning sleeve (45) is fixed relative to the roller (42). The positioning sleeve (45) is provided with a plurality of positioning holes (451) along its circumference for the balls (44) to be placed therein in a one-to-one correspondence.

6. The household appliance according to claim 5, characterized in that: A circle of ribs (453) is provided on the outer peripheral wall of the positioning sleeve (45), and when the positioning sleeve (45) is located between the roller (42) and the inner sleeve (43), the ribs (453) and the inner peripheral wall of the roller (42) are interference fit; or, a circle of ribs (453) is provided on the inner peripheral wall of the roller (42), and when the positioning sleeve (45) is located between the roller (42) and the inner sleeve (43), the ribs (453) and the roller (42) are interference fit.

7. The household appliance according to claim 5, characterized in that: Each positioning hole (451) passes through the end wall of one end of the positioning sleeve (45) to form an entrance (452), and the ball (44) enters the positioning hole (451) from the entrance (452), and the entrance (452) of the positioning hole (451) is tapered with a gradually decreasing diameter along the direction in which the ball (44) enters the positioning hole (451).

8. The household appliance according to any one of claims 1 to 4, characterized in that: A bowl rack (2) is provided in the box body (1), and the bowl rack (2) can be relatively fixed in the front-to-back direction relative to the guide rail (3).

9. The household appliance according to claim 8, characterized in that: A rotatable sliding member (21) is provided above and / or below the guide rail (3), the rotation axis of the sliding member (21) extends in the left-right direction, and the sliding member (21) and the guide rail (3) are slidably matched, the sliding member (21) is installed on the bowl rack (2), and both ends of the guide rail (3) are provided with positioning parts (31) that can abut against the sliding member (21).

10. The household appliance according to any one of claims 1 to 4, characterized in that: The household appliance is a washing machine capable of washing dishes and / or fruits and vegetables.

Images