Guide rail structure for pull basket cabinet and pull basket cabinet

Abstract

The utility model discloses a guide rail structure for a drawer basket cabinet, which comprises a guide rail (31) and a roller component (32) in guide fit with the guide rail (31), and is characterized in that the roller component (32) comprises a wheel shaft (320); the roller inner ring (321) is rotationally connected to the wheel shaft (320); and the roller outer ring (322) is rotatably wound on the periphery of the roller inner ring (321), and the peripheral wall of the roller outer ring (322) is in frictional contact with the guide rail (31). The utility model further discloses a drawer basket cabinet with the guide rail structure. Compared with the prior art, the guide rail structure for the drawer basket cabinet can improve the push-pull smoothness.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen equipment, in particular to a guide rail structure for a pull-out basket cabinet and the pull-out basket cabinet. Background Art

[0002] With the development of society and the advancement of science and technology, people's requirements for life are getting higher and higher. More and more families are starting to install and use dishwashers. Dishwashers not only bring convenience to people, but also save people's time.

[0003] Many dishwashers currently feature a double-layer structure, with the upper pull-out basket being placed in the inner container in a push-and-pull manner. Two left and right guide rails and two sets of guide rollers are located in corresponding positions within the inner container, while two sets of left and right basket rollers are located in corresponding positions within the pull-out basket. The basket rollers are mounted on the guide rails, which in turn are mounted on the guide rollers. During the push-and-pull operation of the basket, the basket rollers can slide along the guide rails, and the guide rails can slide along the guide rollers. For details, see Chinese patent application number CN202321282460.9, "A Guide Rail Structure for Household Appliances and Household Appliances."

[0004] However, in the above solution, when heavy tableware is placed on the pull-out basket, the roller will tilt relative to the guide rail, causing the rolling friction at the roller to become sliding friction. At this time, the friction force becomes greater and pushing and pulling are not smooth. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide a guide rail structure for a pull-out basket cabinet that can improve the smoothness of pushing and pulling in response to the current status of the existing technology.

[0006] The second technical problem to be solved by the present invention is to provide a pull-out basket cabinet using the above-mentioned guide rail structure.

[0007] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a guide rail structure for a pull-out basket cabinet, comprising a guide rail and a roller assembly guided by the guide rail, characterized in that: the roller assembly comprises

[0008] axle;

[0009] The inner ring of the roller is rotatably connected to the wheel axle; and

[0010] The outer ring of the roller is rotatably arranged around the outer periphery of the inner ring of the roller, and the outer peripheral wall is in friction contact with the guide rail.

[0011] In order to make the rolling between the inner ring of the roller and the outer ring of the roller smoother, the roller assembly also includes a plurality of balls arranged at intervals along the circumference of the inner ring of the roller, and each ball can be rolled and limited between the inner ring of the roller and the outer ring of the roller.

[0012] In order to facilitate the uniform distribution and installation of the balls, the roller assembly also includes a retaining frame, which is located between the inner ring and the outer ring of the roller, and the retaining frame is provided with a plurality of limiting holes arranged at intervals along its circumference and corresponding to the balls, and each of the balls can be rolled and installed in the corresponding limiting hole.

[0013] In order to allow the retainer to move freely and reduce friction, a gap is provided between the retainer and the facing surfaces of the inner ring of the roller, and a gap is provided between the retainer and the facing surfaces of the outer ring of the roller.

[0014] In order to prevent the retaining frame from axially separating from the space between the roller inner ring and the roller outer ring, the retaining frame and the roller outer ring have corresponding annular protrusions and annular grooves on their opposing surfaces, respectively. The annular protrusion is confined within the annular groove, and there is a gap between the outer wall of the annular protrusion and the inner wall of the annular groove.

[0015] In order to further limit the position of each ball, the opposite surfaces of the roller inner ring and the roller outer ring are respectively provided with corresponding first annular grooves and second annular grooves. The side of each ball facing the roller inner ring is exposed to the corresponding limiting hole and accommodated in the first annular groove, and the side of each ball facing the roller outer ring is exposed to the corresponding limiting hole and accommodated in the second annular groove.

[0016] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a pull-out basket cabinet, characterized in that it includes a cabinet body, a pull-out basket and the above-mentioned guide rail structure, the number of the guide rail structures is two groups, and they are symmetrically arranged on the left and right sides of the pull-out basket, each of the guide rail structures is connected between the cabinet body and the pull-out basket, and the guide rails extend in the front-to-back direction.

[0017] In order to ensure that the pull-out basket has a sufficiently long stroke during the pushing and pulling process, each of the guide rail structures has a guide groove extending along its length direction, and the roller assemblies are arranged in three groups, which are respectively recorded as the first roller assembly, the second roller assembly and the third roller assembly;

[0018] In each group of first roller assemblies, there are at least two first roller assemblies, which are arranged in the guide groove of the guide rail at intervals along the front-to-back direction, and the wheel axle of each first roller assembly is fixed relative to the cabinet body.

[0019] In each group of second roller assemblies, the number of the second roller assemblies is at least two, and they are arranged above the guide rail at intervals in the front-to-back direction, and the wheel axle of each second roller assembly is fixed relative to the pull-out basket;

[0020] In each group of third roller assemblies, there is at least one third roller assembly, which is arranged below the guide rail, and the axle of the third roller assembly is fixed relative to the pull-out basket.

[0021] In order to limit the first roller assembly to only rolling forward and backward along the guide rail, the cross section of the guide rail is C-shaped.

[0022] In order to limit the second roller assembly and the third roller assembly to rolling only forward and backward along the guide rail, the outer peripheral walls of the roller outer rings of the second roller assembly and the third roller assembly are provided with limiting grooves matching the side edges of the guide rail.

[0023] Compared with the existing technology, the advantages of the present invention are: the roller assembly is composed of a wheel axle, an inner ring of the roller and an outer ring of the roller. When heavy tableware is placed on the pull-out basket, the rolling friction of the outer ring of the roller becomes sliding friction. Although the outer ring of the roller is stuck and can only slide back and forth relative to the guide rail, the inner ring of the roller can still roll relative to the outer ring of the roller, thereby improving the smoothness of pushing and pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a pull-out basket cabinet of the present utility model;

[0025] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0026] Figure 3 for Figure 2 Enlarged view of part I;

[0027] Figure 4 for Figure 1 Schematic diagram of the three-dimensional decomposition of

[0028] Figure 5 for Figure 4 A three-dimensional exploded schematic diagram of the first roller assembly;

[0029] Figure 6 for Figure 4 The second roller assembly and the third roller assembly are shown in the exploded perspective view after the axles are omitted. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0031] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0032] like Figures 1 to 6 The figure shows a preferred embodiment of the pull-out basket cabinet of the present invention. The pull-out basket cabinet can be a cabinet, a cabinet dishwasher, etc. This embodiment uses a cabinet dishwasher as an example. The pull-out basket cabinet includes a cabinet body 1, a pull-out basket 2, and a guide rail structure 3.

[0033] The front side of the cabinet body 1 is open.

[0034] The pull-out basket 2 can be pushed and pulled forward and backward through the opening on the front side of the cabinet body 1 to enter and exit the inner cavity of the cabinet body 1 .

[0035] There are two guide rail structures 3, which are symmetrically arranged on the left and right sides of the pull-out basket 2. Each guide rail structure 3 is connected between the cabinet 1 and the pull-out basket 2, and includes a guide rail 31 and a roller assembly 32 that cooperates with the guide rail 31.

[0036] Specifically, the guide rail 31 extends in the front-to-back direction, and has a guide groove 311 extending along its length direction.

[0037] The roller assemblies 32 are arranged in three groups, designated as a first roller assembly 32a, a second roller assembly 32b, and a third roller assembly 32c. The first roller assembly 32a is mounted on the side wall of the cabinet 1, while the second and third roller assemblies 32b and 32c are mounted on the sides of the pull-out basket 2. Each group of first roller assemblies 32a comprises two first roller assemblies 32a, spaced apart in the front-to-back direction within the guide groove 311 of the guide rail 31. Each group of second roller assemblies 32b comprises two second roller assemblies 32b, spaced apart in the front-to-back direction above the guide rail 31. Each group of third roller assemblies 32c comprises one third roller assembly 32c, spaced apart in the front-to-back direction below the guide rail 31.

[0038] In this embodiment, each roller assembly 32 includes a wheel axle 320 , a roller inner ring 321 , a roller outer ring 322 , a retaining frame 323 and balls 324 .

[0039] Specifically, the first end of the axle 320 of each first roller assembly 32a is connected to the side wall inside the cabinet 1; the first end of the axle 320 of each second roller assembly 32b and the third roller assembly 32c is connected to the side of the pull-out basket 2;

[0040] The roller inner ring 321 is rotatably disposed around the outer circumference of the second end of the wheel shaft 320;

[0041] The outer roller ring 322 is rotatably mounted on the outer periphery of the inner roller ring 321, and the outer peripheral wall of the outer roller ring 322 is in frictional contact with the guide rail 31. The inner roller ring 321 and the outer roller ring 322 have corresponding first and second annular grooves 3211 and 3221 on their opposing surfaces, respectively.

[0042] The retainer 323 is located between the roller inner ring 321 and the roller outer ring 322, and is provided with a plurality of limiting holes 3231 spaced apart along its circumference.

[0043] There are multiple balls 324, which correspond one to one with the above-mentioned limiting holes 3231. Each ball 324 can be rolled and installed in the corresponding limiting hole 3231. The side of each ball 324 facing the inner ring 321 of the roller is exposed to the corresponding limiting hole 3231 and accommodated in the first annular groove 3211. The side of each ball 324 facing the outer ring 322 of the roller is exposed to the corresponding limiting hole 3231 and accommodated in the second annular groove 3221, so that each ball 324 can be rolled and limited between the inner ring 321 and the outer ring 322 of the roller.

[0044] To ensure free movement of the retainer 323 while preventing it from axially disengaging from the space between the roller inner ring 321 and the roller outer ring 322, the retainer 323 and the roller outer ring 322 have corresponding annular protrusions 3232 and annular grooves 3222 on their opposing surfaces, respectively. The annular protrusions 3232 are confined within the annular grooves 3222, creating a gap between the opposing surfaces of the retainer 323 and the roller inner ring 321, a gap between the opposing surfaces of the retainer 323 and the roller outer ring 322, and a gap between the outer wall of the annular protrusions 3232 and the inner wall of the annular grooves 322. This allows the retainer 323 to move relatively freely when the roller outer ring 322 rolls on the guide rail 31. The retainer 323's movement is primarily driven by the revolution of the balls 324 around the roller inner ring 321, resulting in greater freedom of movement and smoother overall rolling.

[0045] In order to prevent each roller assembly 32 from axially separating from the guide rail 31, the cross-section of the guide rail 31 is C-shaped, which can limit the first roller assembly 32a to only rolling back and forth along the guide rail 31; the outer peripheral wall of the roller outer ring 322 of the second roller assembly 32b and the third roller assembly 32c is provided with a limiting groove 3223 that matches the side edge of the guide rail 31, which can limit the second roller assembly 32b and the third roller assembly 32c to only rolling back and forth along the guide rail 31.

[0046] The working principle of this embodiment is as follows: when the pull-out basket 2 is pushed and pulled forward and backward, the second roller assembly 32b and the third roller assembly 32c move forward and backward relative to the guide rail 31, and the guide rail 31 moves forward and backward relative to the first roller assembly 32a. During this process, since the outer peripheral wall of the roller outer ring 322 of each roller assembly 3 is in frictional contact with the guide rail 31, the roller outer ring 322 rolls forward and backward relative to the guide rail 31; when heavy tableware is placed on the pull-out basket 2, causing the rolling friction of the roller outer ring 322 to become sliding friction, although the roller outer ring 322 becomes stuck and can only slide forward and backward relative to the guide rail 31, the roller inner ring 321 can still roll relative to the roller outer ring 322, thereby improving the smoothness of pushing and pulling.

Claims

1. A guide rail structure for a pull-out basket cabinet, comprising a guide rail (31) and a roller assembly (32) guided and matched with the guide rail (31), characterized in that: The roller assembly (32) includes Axle (320); The inner ring of the roller (321) is rotatably connected to the wheel shaft (320); and The roller outer ring (322) is rotatably arranged around the outer periphery of the roller inner ring (321), and the outer peripheral wall is in friction contact with the guide rail (31).

2. The guide rail structure according to claim 1, characterized in that: The roller assembly (32) further comprises a plurality of balls (324) arranged at intervals along the circumference of the roller inner ring (321), and each ball (324) can be rotatably limited between the roller inner ring (321) and the roller outer ring (322).

3. The guide rail structure according to claim 2, characterized in that: The roller assembly (32) further includes a retaining frame (323), which is located between the roller inner ring (321) and the roller outer ring (322), and the retaining frame (323) is provided with a plurality of limiting holes (3231) arranged at intervals along its circumference and corresponding to the balls (324), and each of the balls (324) can be rollingly installed in the corresponding limiting hole (3231).

4. The guide rail structure according to claim 3, characterized in that: There is a gap between the opposing surfaces of the retaining frame (323) and the roller inner ring (321), and there is a gap between the opposing surfaces of the retaining frame (323) and the roller outer ring (322).

5. The guide rail structure according to claim 4, characterized in that: The retaining frame (323) and the roller outer ring (322) have corresponding annular protrusions (3232) and annular grooves (3222) on their opposing surfaces, respectively. The annular protrusion (3232) is limited in the annular groove (3222), and there is a gap between the outer wall of the annular protrusion (3232) and the inner wall of the annular groove (3222).

6. The guide rail structure according to any one of claims 3 to 5, characterized in that: The opposing surfaces of the roller inner ring (321) and the roller outer ring (322) are respectively provided with a corresponding first annular groove (3211) and a second annular groove (3221); the side of each ball (324) facing the roller inner ring (321) is exposed to the corresponding limiting hole (3231) and is accommodated in the first annular groove (3211); the side of each ball (324) facing the roller outer ring (322) is exposed to the corresponding limiting hole (3231) and is accommodated in the second annular groove (3221).

7. A pull-out basket cabinet, characterized by: The invention comprises a cabinet body (1), a pull-out basket (2) and a guide rail structure (3) as described in any one of claims 1 to 6, wherein the guide rail structures (3) are in two groups and are symmetrically arranged on the left and right sides of the pull-out basket (2), each of the guide rail structures (3) is connected between the cabinet body (1) and the pull-out basket (2), and the guide rails (31) extend in the front-rear direction.

8. The pull-out basket cabinet according to claim 7, characterized in that: In each of the guide rail structures (3), the guide rail (31) has a guide groove (311) extending along its length direction, and the roller assemblies (32) are arranged in three groups, which are respectively recorded as a first roller assembly (32a), a second roller assembly (32b) and a third roller assembly (32c); In each group of first roller assemblies (32a), the number of the first roller assemblies (32a) is at least two, and the first roller assemblies (32a) are arranged in a guide groove (311) of the guide rail (31) at intervals along the front-back direction, and the wheel axle (320) of each first roller assembly (32a) is fixed relative to the cabinet (1). In each group of second roller assemblies (32b), the number of the second roller assemblies (32b) is at least two, and they are arranged above the guide rail (31) at intervals in the front-to-back direction, and the wheel axle (320) of each second roller assembly (32b) is fixed relative to the pull-out basket (2); In each group of third roller assemblies (32c), the number of the third roller assembly (32c) is at least one and is arranged below the guide rail (31), and the axle (320) of the third roller assembly (32c) is fixed relative to the pull-out basket (2).

9. The pull-out basket cabinet according to claim 8, characterized in that: The cross section of the guide rail (31) is C-shaped.

10. The pull-out basket cabinet according to claim 8, characterized in that: The outer peripheral walls of the roller outer rings (322) of the second roller assembly (32b) and the third roller assembly (32c) are provided with limiting grooves (3223) that match the side edges of the guide rail (31).

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