Roller assembly, dish basket and dish washing machine

Abstract

The utility model discloses a roller assembly, a bowl basket and a dish-washing machine, the roller assembly comprises a shaft part, a roller part, a plurality of first balls and a plurality of second balls, the roller part is rotatably sleeved on the outer side of the shaft part, and the roller part is separated from the shaft part; the plurality of first balls are arranged between the roller part and the shaft part around the shaft part; the multiple second balls are arranged between the roller part and the shaft part around the shaft part, and the multiple second balls and the multiple first balls are distributed in the axial direction of the shaft part. According to the rolling wheel assembly, friction and abnormal noise between the rolling wheel part and the shaft part can be reduced, resistance of the rolling wheel assembly in the movement process is reduced, and the movement stability of the rolling wheel assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a roller assembly, a dish rack, and a dishwasher. Background Technology

[0002] The rollers support the dishwasher basket, making it easy to push and pull the basket inside the dishwasher. In related technologies, the rollers rotate relative to each other through sliding friction between plastic axles and plastic rollers, which can easily produce abnormal noise and make pushing and pulling difficult. As one of the most frequently used parts of the dishwasher, the basket's difficult pushing and pulling or abnormal noise will affect the user's use. Utility Model Content

[0003] The present invention aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of the present invention is to provide a roller assembly that exhibits smooth movement and high stability.

[0004] Another objective of this invention is to provide a bowl basket, including the aforementioned roller assembly.

[0005] Another object of this invention is to provide a dishwasher, including the aforementioned roller assembly or the aforementioned dish rack.

[0006] The roller assembly according to an embodiment of the present invention includes: a shaft portion, a roller portion, a plurality of first balls and a plurality of second balls. The roller portion is rotatably sleeved on the outside of the shaft portion, and the roller portion is spaced apart from the shaft portion. The plurality of first balls are disposed around the shaft portion between the roller portion and the shaft portion. The plurality of second balls are disposed around the shaft portion between the roller portion and the shaft portion. The plurality of second balls and the plurality of first balls are distributed along the axial direction of the shaft portion.

[0007] According to the embodiment of the present invention, the roller assembly has a plurality of first balls and a plurality of second balls distributed along the axial direction of the shaft, which can reduce friction and noise between the roller part and the shaft part, reduce the resistance of the roller assembly during movement, and improve the rotational stability of the roller assembly, making the movement of the roller assembly smoother.

[0008] In addition, the roller assembly according to the above embodiments of the present invention may also have the following additional technical features:

[0009] In some embodiments, the distance between the plurality of first balls and the plurality of second balls along the axial direction of the shaft is L0, the distance between the plurality of first balls and the axis of the shaft is L1, and the distance between the plurality of second balls and the axis of the shaft is L2, wherein 8mm≤L0≤10mm; and / or, 1.7≤L0 / L1≤2.1; and / or, 1.7≤L0 / L2≤2.

[0010] In some embodiments, the diameter of the plurality of first balls is D1, the diameter of the plurality of second balls is D2, the distance between the plurality of first balls and the axis of the shaft is L1, and the distance between the plurality of second balls and the axis of the shaft is L2, wherein D1 / L1≥D2 / L2; and / or, 0.79≤D1 / L1≤0.86; and / or, 0.75≤D2 / L2≤0.83.

[0011] In some embodiments, the shaft portion has a first end and a second end opposite to each other along the axial direction, the shaft portion is provided with a first groove and a second groove, the first groove being closer to the first end than the second groove, the roller portion is provided with a third groove and a fourth groove, the first groove and the third groove being opposite to each other for accommodating the plurality of first balls; the second groove and the fourth groove being opposite to each other for accommodating the plurality of second balls.

[0012] In some embodiments, the shaft portion includes a first shaft segment and a second shaft segment, the first shaft segment extending from the first end to connect to the second shaft segment, the first groove being disposed on the outer peripheral surface of the first shaft segment, and the second shaft segment protruding radially from the outer peripheral surface of the first shaft segment to form the second groove.

[0013] In some embodiments, the outer peripheral surface of the first shaft segment includes a first surface and a second surface, the first groove is configured as a concave arc surface disposed between the first surface and the second surface, the first surface extends from the first end to the first groove, the second surface extends from the first groove to the second shaft segment, and the radial dimension of the first surface is not greater than the radial dimension of the second surface.

[0014] In some embodiments, the ratio of the outer diameter D1 of the second surface to the inner diameter D2 of the roller portion satisfies: 0.6 ≤ D1 / D2 ≤ 0.75.

[0015] In some embodiments, the outer peripheral surface of the second shaft segment includes a third surface connected to the outer peripheral surface of the first shaft segment and configured as an arc shape that gradually slopes outward radially in a direction away from the first end, and the second groove is formed between the third surface and the outer peripheral surface of the first shaft segment.

[0016] In some embodiments, the roller portion includes a first portion and a second portion, the first portion extending from one end edge of the roller portion to connect to the second portion, the third groove being provided on the inner circumferential surface of the first portion; the second portion extending from the other end edge of the roller portion to connect to the first portion, the second portion being radially recessed relative to the first portion, and forming the fourth groove.

[0017] In some embodiments, the inner peripheral surface of the first portion includes a fourth surface and a fifth surface, the third groove is configured as a concave arc surface between the fourth surface and the fifth surface, the fourth surface extends from the one-end edge to the third groove, the fifth surface extends from the third groove to the second portion, and the radial dimension of the fourth surface is not less than the radial dimension of the fifth surface.

[0018] In some embodiments, the inner peripheral surface of the second portion includes a sixth surface and a seventh surface, the sixth surface being connected to the inner peripheral surface of the first portion and configured as an arc that gradually slopes outward radially away from the first portion, the seventh surface being connected to the sixth surface and extending radially to the other end edge, the sixth surface and the seventh surface cooperating to form the fourth groove.

[0019] In some embodiments, the shaft portion further includes a connecting bracket disposed at a second end of the shaft portion and configured to connect a bowl basket.

[0020] In some embodiments, the roller assembly further includes a retainer disposed between the shaft portion and the roller portion, and having a plurality of positioning holes for positioning the plurality of first balls and the plurality of second balls; and / or, the shaft portion is configured as a hollow cylindrical shape.

[0021] In some embodiments, the ratio of the difference between the minimum radial dimension D11 of the first groove and the maximum radial dimension D21 of the third groove, D21-D11, to the diameter D31 of the first ball satisfies: 0.35≤D31 / (D21-D11)≤0.55;

[0022] And / or, the ratio of the difference between the minimum radial dimension D12 of the second groove and the maximum radial dimension D22 of the fourth groove, D22-D12, to the diameter D32 of the second ball satisfies: 0.35≤D32 / (D22-D12)≤0.55.

[0023] In some embodiments, the ratio of the depth dimension H11 of the first groove to the diameter dimension D11' of the cross-section of the first groove satisfies: 0.05≤H11 / D11'≤0.25;

[0024] And / or, the ratio of the depth dimension H12 of the second groove to the diameter dimension D12' of the cross section of the second groove satisfies: 0.35≤H12 / D12'≤0.55;

[0025] And / or, the ratio of the depth dimension H21 of the third groove to the diameter dimension D21' of the cross section of the third groove satisfies: 0.15≤H21 / D21'≤0.35;

[0026] And / or, the ratio of the depth dimension H22 of the fourth groove to the diameter dimension D22' of the cross section of the fourth groove satisfies: 0.35≤H22 / D22'≤0.35.

[0027] The bowl basket according to an embodiment of the present utility model includes a bowl basket body and the aforementioned roller assembly, wherein the shaft portion is connected to the bowl basket body.

[0028] The dishwasher according to an embodiment of the present invention includes the aforementioned roller assembly; or includes the aforementioned dish rack. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the roller assembly according to an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the roller assembly in another direction according to an embodiment of the present invention.

[0031] Figure 3 This is a cross-sectional view of the roller assembly according to an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the shaft portion of the roller assembly according to an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the roller assembly according to an embodiment of the present invention, in which the shaft portion is hidden.

[0034] Figure 6 This is a schematic diagram of the roller assembly from another direction according to an embodiment of the present invention, in which the shaft portion is hidden.

[0035] Figure 7 This is a schematic diagram of the roller portion of the roller assembly according to an embodiment of the present invention.

[0036] Figure 8 This is an exploded view of the roller assembly according to an embodiment of the present invention.

[0037] Figure 9 This is a schematic diagram of the shaft portion of the roller assembly according to an embodiment of the present invention.

[0038] Figure 10 A schematic diagram of the roller portion of the roller assembly according to an embodiment of this utility model.

[0039] Figure 11 This is a schematic diagram of the roller assembly shaft from another angle according to an embodiment of the present invention.

[0040] Figure 12 This is a cross-sectional schematic diagram of the roller portion of the roller assembly according to an embodiment of the present invention.

[0041] Figure label:

[0042] Roller assembly 100, shaft portion 10, first end 10a, second end 10b, first groove 11, second groove 12, first shaft segment 13, first surface 131, second surface 132, second shaft segment 14, third surface 141, boss 15, roller portion 20, third groove 21, fourth groove 22, first part 23, fourth surface 231, fifth surface 232, second part 24, sixth surface 241, seventh surface 242, first ball 31, second ball 32, connecting frame 40, retainer 50. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0044] Combination Figures 1 to 3 According to an embodiment of the present invention, the roller assembly 100 includes a shaft portion 10 and a roller portion 20. The roller portion 20 is rotatably sleeved on the outside of the shaft portion 10 and spaced apart from the shaft portion 10. When the roller portion 20 rotates, it generates relative movement with the shaft portion 10. The spaced distance between the roller portion 20 and the shaft portion 10 facilitates relative movement between the roller portion 20 and the shaft portion 10.

[0045] The roller assembly 100 may further include a plurality of first balls 31 and a plurality of second balls 32. The plurality of first balls 31 are disposed between the roller portion 20 and the shaft portion 10 around the shaft portion 10, and the plurality of second balls 32 are disposed between the roller portion 20 and the shaft portion 10 around the shaft portion 10. By providing a plurality of first balls 31 and a plurality of second balls 32 between the roller portion 20 and the shaft portion 10, friction and noise between the roller portion 20 and the shaft portion 10 can be reduced, and resistance of the roller assembly 100 during movement can be reduced. In addition, the plurality of second balls 32 and the plurality of first balls 31 are distributed along the axial direction of the shaft portion 10. The two sets of axially distributed balls can provide stable support for the roller portion 20, enabling the roller portion 20 to rotate stably and preventing the roller portion 20 from shaking during rotation, thereby improving the motion stability of the roller assembly 100.

[0046] According to the embodiment of the present utility model, the roller assembly 100 has a plurality of first balls 31 and a plurality of second balls 32 distributed along the axial direction of the shaft portion 10, which can reduce the friction and noise between the roller portion 20 and the shaft portion 10, reduce the resistance of the roller assembly 100 during the movement, and improve the rotational stability of the roller assembly 100, making the movement of the roller assembly 100 smoother.

[0047] The roller assembly 100 of this utility model embodiment can be applied to devices that need to bear, guide, or roll. For example, the roller assembly 100 can be applied to a bowl basket. The roller assembly 100 can be fixed to the bowl basket body by the shaft portion 10. By setting multiple balls between the shaft portion 10 and the roller portion 20, the friction between the roller portion 20 and the shaft portion 10 can be reduced when the roller rotates. The roller slides smoothly and stably, which can reduce the resistance to pushing and pulling when pushing and pulling the bowl basket and improve the user experience.

[0048] The plurality of first balls 31 and the plurality of second balls 32 are disposed between the shaft portion 10 and the roller portion 20. A positioning groove can be constructed between the shaft portion 10 and the roller portion 20 to position the plurality of first balls 31 and the plurality of second balls 32. Alternatively, a retainer 50 can be provided between the shaft portion 10 and the roller portion 20 to improve the stability of the plurality of first balls 31 and the plurality of second balls 32.

[0049] Furthermore, combined Figure 3 and Figure 4 The shaft portion 10 has a first end 10a and a second end 10b opposite each other along the axial direction. The shaft portion 10 is provided with a first groove 11 and a second groove 12. The first groove 11 is closer to the first end 10a than the second groove 12. The roller portion 20 is provided with a third groove 21 and a fourth groove 22. The first groove 11 and the third groove 21 are opposite each other and are used to accommodate a plurality of first balls 31. The second groove 12 and the fourth groove 22 are opposite each other and are used to accommodate a plurality of second balls 32. By providing grooves in both the shaft portion 10 and the roller portion 20, the plurality of first balls 31 and the plurality of second balls 32 can be limited and guided, improving the movement stability of the plurality of first balls 31 and the plurality of second balls 32. Furthermore, the plurality of first balls 31 and the plurality of second balls 32 can stably support the rotation of the roller portion 20 by cooperating in the axial direction of the shaft portion 10, further improving the smoothness of the movement of the roller assembly 100.

[0050] Combination Figure 4 In some embodiments of this utility model, the shaft portion 10 includes a first shaft segment 13 and a second shaft segment 14. The first shaft segment 13 extends from a first end 10a to connect to the second shaft segment 14. A first groove 11 is provided on the outer peripheral surface of the first shaft segment 13. The second shaft segment 14 protrudes radially from the outer peripheral surface of the first shaft segment 13 and forms a second groove 12. Specifically, when assembling the roller assembly 100, the first end 10a of the shaft portion 10 can be inserted into the inner side of the roller portion 20. In other words, the first shaft segment 13 of the shaft portion 10 can be inserted into the inner side of the roller portion 20. The second shaft segment 14 protrudes radially from the outer peripheral surface of the first shaft segment 13. That is, the radial dimension of the first shaft segment 13 is smaller than the radial dimension of the second shaft segment 14, which facilitates the insertion of the first shaft segment 13 of the shaft portion 10 into the inner side of the roller portion 20.

[0051] Furthermore, combined Figure 4 The outer peripheral surface of the first shaft segment 13 includes a first surface 131 and a second surface 132. The first groove 11 is configured as a concave arc surface between the first surface 131 and the second surface 132. The concave arc surface can reduce the friction of the first ball 31. The first surface 131 extends from the first end 10a to the first groove 11, and the second surface 132 extends from the first groove 11 to the second shaft segment 14. The radial dimension of the first surface 131 is not greater than the radial dimension of the second surface 132. Specifically, the first surface 131 is close to the first end 10a of the shaft portion 10, and the radial dimension of the first surface 131 is small, which facilitates the assembly of the shaft portion 10.

[0052] Specifically, when assembling the roller assembly 100, the roller part 20 can be fixed on the tooling first, and the tooling can be used to position the first ball 31 in the third groove 21 and the second ball 32 in the fourth groove 22. Then, a certain force is applied to press the shaft part 10 into the roller part 20. At this time, the first ball 31 can be positioned in the receiving space constructed by the first groove 11 and the third groove 21, and the second ball 32 can be positioned in the receiving space constructed by the second groove 12 and the fourth groove 22. The radial dimension of the first surface 131 is not greater than the radial dimension of the second surface 132. When the shaft portion 10 is installed inside the roller portion 20, the first end 10a of the shaft portion 10 can overcome the gap between it and the multiple first balls 31, thereby improving the installation efficiency. After assembly, the multiple first balls 31 can be confined in the space defined by the first groove 11 and the third groove 21 to restrict the shaft portion 10 from moving in the axial direction, prevent the shaft portion 10 from being pulled out from the inside of the roller portion 20, and improve the structural stability of the roller assembly 100.

[0053] Combination Figure 9 and Figure 10 In some embodiments of this utility model, the ratio of the outer diameter D1 of the second surface 132 to the inner diameter D2 of the roller portion 20 satisfies: 0.6 ≤ D1 / D2 ≤ 0.75. For example, the ratio of the outer diameter D1 of the second surface 132 to the inner diameter D2 of the roller portion 20 can be 0.6, 0.69, 0.7, 0.72, 0.75, etc. By setting the ratio of the outer diameter D1 of the second surface 132 to the inner diameter D2 of the roller portion 20 within a reasonable range, the stability of the plurality of first balls 31 and the plurality of second balls 32 can be improved. A ratio of D1 to D2 less than or equal to 0.75 avoids an excessively large ratio, which could cause the plurality of first balls 31 and the plurality of second balls 32 to wobble during movement, affecting the working stability of the roller assembly 100; a ratio of D1 to D2 greater than or equal to 0.6, with the same inner diameter of the roller portion 20, facilitates the installation of the shaft portion 10 and improves installation efficiency.

[0054] Combination Figure 3In some embodiments of this utility model, the outer peripheral surface of the second shaft segment 14 includes a third surface 141, which is connected to the outer peripheral surface of the first shaft segment 13 and is configured as an arc shape that gradually slopes outward in the radial direction away from the first end 10a. A second groove 12 is formed between the third surface 141 and the outer peripheral surface of the first shaft segment 13. The second groove 12 cooperates with the fourth groove 22 to accommodate a plurality of second balls 32 and to limit and guide the plurality of second balls 32, thereby improving the movement stability of the plurality of second balls 32. In addition, the third surface 141 gradually slopes outward in the radial direction away from the first end 10a, which can reduce the friction of the second balls 32 and limit the plurality of second balls 32, preventing the second balls 32 from falling out between the roller portion 20 and the shaft portion 10 when vibrating or falling, thereby improving the reliability of the roller assembly 100.

[0055] Combination Figures 5 to 7 In some embodiments of this utility model, the roller portion 20 includes a first portion 23 and a second portion 24. The first portion 23 extends from one end edge of the roller portion 20 to connect with the second portion 24, and a third groove 21 is provided on the inner circumferential surface of the first portion 23. The second portion 24 extends from the other end edge of the roller portion 20 to connect with the first portion 23. The second portion 24 is radially recessed relative to the first portion 23 and forms a fourth groove 22. In other words, in the radial direction, the recess size of the fourth groove 22 is larger than the recess size of the third groove 21. The shaft portion 10 can be inserted into the roller portion 20 from one end near the second portion 24. The second portion 24 is radially recessed relative to the first portion 23. The second portion 24 can form an open groove, which facilitates the smooth installation of the shaft portion 10 from one side of the open groove and improves the installation efficiency of the shaft portion 10.

[0056] Combination Figure 3 , Figure 4 and Figure 6 In some embodiments of this utility model, the third surface 141 is radially inclined outward in a direction away from the first end 10a to form a second groove 12, and the second part 24 is radially recessed relative to the first part 23. Therefore, by the cooperation of the second groove 12 and the second part 24, the shaft part 10 can be easily assembled, and the multiple second balls 32 can be effectively limited to prevent them from falling out of the gap between the roller part 20 and the shaft part 10. The effective limiting can improve the motion stability of the multiple second balls 32 and prevent the roller part 20 from shaking during rotation.

[0057] In conjunction with item 7, in some embodiments of this utility model, the inner peripheral surface of the first part 23 includes a fourth surface 231 and a fifth surface 232. The third groove 21 is configured as a concave arc surface between the fourth surface 231 and the fifth surface 232. The concave arc surface can reduce the friction of the plurality of first balls 31. The fourth surface 231 extends from one edge to the third groove 21, and the fifth surface 232 extends from the third groove 21 to the second part 24. The radial dimension of the fourth surface 231 is not less than the radial dimension of the fifth surface 232, so that the fourth surface 231 and the first surface 131 can cooperate to limit the plurality of first balls 31, prevent the plurality of first balls 31 from falling out of the gap between the shaft part 10 and the roller part 20 when vibrating or falling, etc., and improve the stability of the plurality of first balls 31.

[0058] In some embodiments of this utility model, the inner peripheral surface of the second part 24 includes a sixth surface 241 and a seventh surface 242. The sixth surface 241 is connected to the inner peripheral surface of the first part 23 and is configured as an arc shape that gradually slopes outward in the radial direction away from the first part 23. The seventh surface 242 connects to the sixth surface 241 and extends radially to the other end edge. The sixth surface 241 and the seventh surface 242 cooperate to form a fourth groove 22. The fourth groove 22 can reduce the friction of the multiple second balls 32 during rolling. The sixth surface 241 and the seventh surface 242 cooperate to form an open mounting groove, which facilitates the insertion of the shaft part 10 from the other end of the roller part 20.

[0059] Optionally, a boss 15 is provided at the second end 10b of the shaft portion 10 to enhance the structural strength of the shaft portion 10 and to limit the movement of multiple second balls 32. The ratio of the difference between the radial dimension D15 of the boss 15 and the radial dimension D1 of the second surface 132 to the radial dimension D15 of the boss 15 satisfies the condition 0.1 ≤ (D15 - D1) / D15 ≤ 0.3. For details, please refer to the appendix. Figure 9 The radial dimension of the boss 15 is D15, and the radial dimension of the second surface 132 is D1. For example, (D15-D1) / D15 can be set to 0.1, 0.15, 0.19, 0.2, 0.25, 0.3, etc. By limiting the difference between the radial dimension D15 of the boss 15 and the radial dimension D1 of the second surface 132, and ensuring the ratio of this difference to the radial dimension of the boss 15 is within a reasonable range, the stability of the multiple second balls 32 can be effectively improved. When the ratio of (D15-D1) / D15 is too large or too small, with the same inner diameter of the roller portion 20 and the diameter of the second ball 32, it is not conducive to limiting the second ball 32 through the cooperation of the boss 15 and the roller portion 20.

[0060] In conjunction with the foregoing, the sixth surface 241 and the seventh surface 242 of the roller portion 20 cooperate to form an open mounting groove, which facilitates the insertion of the shaft portion 10 from the other end of the roller portion 20. By providing the boss 15, it is easy to cooperate with the fourth groove 22 to limit the position of the multiple second balls 32 and improve the stability of the multiple second balls 32.

[0061] Combination Figure 3 and Figure 8 In some embodiments of this utility model, the roller assembly 100 further includes a retainer 50, which is disposed between the shaft portion 10 and the roller portion 20. The retainer 50 has multiple positioning holes for positioning multiple first balls 31 and multiple second balls 32. Specifically, the retainer 50 may be a hollow cylindrical structure, with multiple positioning holes at both ends along the axial direction. By providing multiple positioning holes, multiple first balls 31 and multiple second balls 32 can be positioned, facilitating the assembly of the roller assembly 100 during assembly. This allows the retainer 50 to fix the multiple first balls 31 and multiple second balls 32 before installing the shaft portion 10, improving the assembly efficiency of the roller assembly 100. Furthermore, the retainer 50 can limit the movement of the multiple first balls 31 and multiple second balls 32, improving the movement stability of the roller assembly 100.

[0062] In some embodiments of this utility model, the shaft portion 10 can be configured as a hollow cylindrical shape, which can reduce the weight of the shaft portion 10, improve the structural rigidity of the shaft portion 10, and facilitate the shaft portion 10 to be installed into the roller portion 20.

[0063] In some embodiments of this utility model, the circumferential spacing between the plurality of first balls 31 and the plurality of second balls 32 along the shaft portion 10 is L0, wherein 8mm ≤ L0 ≤ 10mm. It should be noted that the axial spacing between the plurality of first balls 32 and the plurality of second balls 32 along the shaft portion 10 in this application is the minimum distance between the centers of the first balls 31 and the second balls 32. By setting the spacing between the plurality of first balls 31 and the plurality of second balls 32 within a reasonable range, the working stability of the two rows of balls is improved, the movement of the shaft portion 10 is stably supported by the two rows of balls, and the structure of the roller assembly 100 is made compact. For example, L0 can be set to 8mm, 8.5mm, 9mm, 10mm, etc.

[0064] In some embodiments of this utility model, the distance between the plurality of first balls 31 and the plurality of second balls 32 along the circumferential direction of the shaft portion 10 is L0, and the distance between the plurality of first balls 31 and the axis of the shaft portion 10 is L1, wherein 1.7≤L0 / L1≤2.1. For example, the ratio of L0 to L1 can be set to 1.7, 1.8, 1.9, 2.0, 2.1, etc. By setting the ratio of L0 to L1 within a reasonable range, it is convenient to support the movement of the shaft portion 10 by the plurality of first balls 31, thereby improving the structural stability of the roller assembly 100.

[0065] In some embodiments of this utility model, the distance between the plurality of first balls 31 and the plurality of second balls 32 along the circumferential direction of the shaft portion 10 is L0, and the distance between the plurality of second balls 31 and the axis of the shaft portion 10 is L2. 1.7≤L0 / L2≤2. Exemplarily, the ratio of L0 to L2 can be set to 1.7, 1.8, 1.9, 2.0, etc. By setting the ratio of L0 to L2 within a reasonable range, it is convenient to support the movement of the shaft portion 10 by the plurality of second balls 32, thereby improving the structural stability of the roller assembly 100.

[0066] In some embodiments of this utility model, the diameter of the plurality of first balls 31 is D1, the diameter of the plurality of second balls 31 is D2, the distance between the plurality of first balls 31 and the axis of the shaft portion 10 is L1, and the distance between the plurality of second balls 31 and the axis of the shaft portion 10 is L2, wherein D1 / L1≥D2 / L2. Specifically, when assembling the roller assembly 100, the roller portion 20, the plurality of first balls 31 and the plurality of second balls 32 can be fixed first by tooling, and then the shaft portion 20 can be installed. By setting D1 / L1 to be greater than D2 / L2, it is easier for the shaft portion 10 to be pressed into the roller portion 20, thereby improving the installation efficiency of the roller assembly 100.

[0067] In some embodiments, 0.79 ≤ D1 / L1 ≤ 0.86. For example, the ratio of D1 to L1 can be 0.79, 0.8, 0.83, 0.84, 0.86, etc., so that the plurality of first rollers 31 stably support the movement of the shaft portion 10 and improve the working stability of the roller assembly 100.

[0068] In some embodiments, 0.75 ≤ D2 / L2 ≤ 0.83. For example, the ratio of D2 to L2 can be 0.79, 0.8, 0.81, 0.82, 0.83, etc., so that the plurality of second rollers 32 stably support the movement of the shaft portion 10 and improve the working stability of the roller assembly 100.

[0069] Combination Figure 11 and Figure 12In some embodiments of this utility model, the ratio of the difference between the minimum radial dimension D11 of the first groove 11 and the maximum radial dimension D21 of the third groove 21 (D21-D11) to the diameter D31 of the first ball 31 satisfies: 0.35 ≤ D31 / (D21-D11) ≤ 0.55. For example, D31 / (D21-D11) can be set to 0.35, 0.4, 0.45, 0.5, 0.52, 0.54, 0.55, 0.6, 0.65, etc. By setting D31 / (D21-D11) within a suitable range, the first groove 11 and the third groove 21 can cooperate to improve the stability of the multiple first balls 31. Wherein, (D21-D11)≤0.55, to avoid the value of D31 / (D21-D11) being too large, which would be unfavorable for the installation of the shaft 10 under the same size of the first ball 31; when the value of D31 / (D21-D11) is too small, under the same size of the first ball 31, it is easy for the first ball 31 to wobble in the space between the first groove 11 and the third groove 21, affecting the stability of the roller assembly 100.

[0070] Combination Figure 11 and Figure 12 In some embodiments of this utility model, the ratio of the difference between the minimum radial dimension D12 of the second groove 12 and the maximum radial dimension D22 of the fourth groove 22 (D22-D12) to the diameter D32 of the second ball 32 satisfies: 0.35 ≤ D32 / (D22-D12) ≤ 0.55. For example, D32 / (D22-D12) can be set to 0.35, 0.4, 0.45, 0.48, 0.49, 0.5, 0.55, 0.6, 0.65, etc. By setting D32 / (D22-D12) within a suitable range, the second groove 12 and the fourth groove 22 can cooperate to improve the stability of the multiple second balls 32. When the value of D32 / (D22-D12) is too large, it is not conducive to the installation of the shaft 10 with the same size of the second ball 32; when the value of D32 / (D22-D12) is too large, with the same size of the second ball 32, it is easy for the second ball 32 to wobble in the space between the second groove 12 and the fourth groove 22, affecting the stability of the roller assembly 100.

[0071] Combination Figure 11In some embodiments of this utility model, the ratio of the depth dimension H11 of the first groove 11 to the diameter dimension D11' of the cross-section of the first groove 11 satisfies: 0.05 ≤ H11 / D11' ≤ 0.25. For example, the ratio of H11 to D11' can be set to 0.05, 0.1, 0.14, 0.15, 0.17, 0.20, 0.25, etc. By setting the ratio of H11 to D11' within a reasonable range, it is convenient to limit the first ball 31 through the first groove 11, improving the stability of the first ball 31 and facilitating the installation of the shaft 10. When the ratio of H11 to D11' is too large, it can easily affect the installation of the shaft 10 under the same diameter dimension D11' of the first groove 11 cross section. It can be understood that when the shaft 10 is installed, force needs to be applied to press it into the roller 10. If the size of H11 is too large, it will make the installation of the shaft 10 difficult and affect the installation efficiency of the shaft 10. When the ratio of H11 to D11' is too small, it is not conducive to limiting the first ball 31 through the first groove 11 under the same diameter dimension D11' of the first groove 11 cross section.

[0072] Combination Figure 11 In some embodiments of this utility model, the ratio of the depth dimension H12 of the second groove 12 to the diameter dimension D12' of the cross-section of the second groove 12 satisfies: 0.35≤H12 / D12'≤0.55. For example, the ratio of H12 to D12' can be set to 0.35, 0.4, 0.43, 0.45, 0.47, 0.5, 0.55, etc. By setting the ratio of H12 to D12' within a reasonable range, it is convenient to limit the second ball 32 through the second groove 12, and it is also convenient for the second groove 12 to cooperate with the fourth groove 22 of the roller part 20 to limit the second ball 32, preventing multiple second balls 32 from falling out of the gap between the roller part 20 and the shaft part 10. Effective limiting can improve the movement stability of multiple second balls 32.

[0073] Combination Figure 12 In some embodiments of this utility model, the ratio of the depth dimension H21 of the third groove 21 to the diameter dimension D21' of the cross-section of the third groove 21 satisfies: 0.15 ≤ H21 / D21' ≤ 0.35. Exemplarily, the ratio of H21 to D21' can be set to 0.15, 0.2, 0.21, 0.25, 0.28, 0.3, 0.35, etc. By setting the ratio of H21 to D21' within a reasonable range, it is convenient to limit the first ball 31 through the cooperation of the third groove 21 and the first groove 11, thereby improving the stability of the multiple first balls 31.

[0074] Combination Figure 12In some embodiments of this utility model, the ratio of the depth dimension H22 of the fourth groove 22 to the diameter dimension D22' of the cross-section of the fourth groove 22 satisfies: 0.35 ≤ H22 / D22' ≤ 0.35. Exemplarily, the ratio of H22 to D22' can be set to 0.15, 0.2, 0.21, 0.25, 0.28, 0.3, 0.35, etc. By setting the ratio of H22 to D22' within a reasonable range, it is convenient to limit the second ball 32 through the cooperation of the fourth groove 22 and the second groove 12, thereby improving the stability of the multiple second balls 32. Combined with... Figure 4 In some embodiments of this utility model, the shaft portion 10 further includes a connecting frame 40, which is disposed at the second end 10b of the shaft portion 10 and configured to connect the bowl basket. The shaft portion 10 can be connected to the side of the bowl basket body or to the bottom of the bowl basket body. When the bowl basket is pushed or pulled, the shaft portion 10 can be fixed relative to the bowl basket, while the roller portion 20 rotates. By providing multiple balls between the shaft portion 10 and the roller portion 20, friction and noise between the shaft portion 10 and the roller portion 20 can be reduced. Furthermore, multiple first balls 31 and multiple second balls 32 are distributed in the axial direction of the shaft portion 10, effectively supporting the roller portion 20 and ensuring smooth and stable rotation of the roller portion 20, thereby making the pushing and pulling of the bowl basket smoother.

[0075] The bowl basket according to the present utility model includes a bowl basket body and the aforementioned roller assembly 100. The shaft 10 is connected to the bowl basket body. The roller assembly 100 rolls smoothly and has high stability, which can reduce friction and noise during the pushing and pulling process of the bowl basket, and make the pushing and pulling of the bowl basket smooth.

[0076] The dishwasher according to the present invention includes the aforementioned roller assembly 100; or includes the aforementioned dish rack, which makes the dish rack smoother during the pushing and pulling process, improving the pushing and pulling experience of the dish rack, and thus improving the user experience.

[0077] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0080] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0082] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A roller assembly, characterized by include: Shaft portion; A roller portion, which is rotatably sleeved on the outside of the shaft portion and spaced apart from the shaft portion; A plurality of first balls are disposed between the roller portion and the shaft portion around the shaft portion; A plurality of second balls are disposed between the roller portion and the shaft portion around the shaft portion, and the plurality of second balls and the plurality of first balls are distributed along the axial direction of the shaft portion; The shaft portion has a first end and a second end opposite to each other along the axial direction. The shaft portion is provided with a first groove and a second groove. The first groove is closer to the first end than the second groove. The roller portion is provided with a third groove and a fourth groove. The first groove and the third groove are opposite to each other for accommodating the plurality of first balls. The second groove and the fourth groove are opposite to each other for accommodating the plurality of second balls. The ratio of the difference between the minimum radial dimension D11 of the first groove and the maximum radial dimension D21 of the third groove, D21-D11, to the diameter D31 of the first ball satisfies: 0.35≤D31 / (D21-D11)≤0.55; And / or, the ratio of the difference between the minimum radial dimension D12 of the second groove and the maximum radial dimension D22 of the fourth groove, D22-D12, to the diameter D32 of the second ball satisfies: 0.35≤D32 / (D22-D12)≤0.

55.

2. The roller assembly of claim 1, wherein, The distance between the plurality of first balls and the plurality of second balls along the axial direction of the shaft is L0, the distance between the plurality of first balls and the axis of the shaft is L1, and the distance between the plurality of second balls and the axis of the shaft is L2, wherein 8mm≤L0≤10mm; and / or, 1.7≤L0 / L1≤2.1; and / or, 1.7≤L0 / L2≤2.

3. The roller assembly of claim 1, wherein, The plurality of first balls have a diameter of D1, the plurality of second balls have a diameter of D2, the distance between the plurality of first balls and the axis of the shaft is L1, and the distance between the plurality of second balls and the axis of the shaft is L2, wherein D1 / L1≥D2 / L2; and / or, 0.79≤D1 / L1≤0.86; and / or, 0.75≤D2 / L2≤0.

83.

4. The roller assembly of claim 1, wherein, The shaft portion includes a first shaft segment and a second shaft segment. The first shaft segment extends from the first end to connect to the second shaft segment. The first groove is provided on the outer peripheral surface of the first shaft segment. The second shaft segment protrudes radially from the outer peripheral surface of the first shaft segment and forms the second groove.

5. The roller assembly of claim 4, wherein, The outer peripheral surface of the first shaft segment includes a first surface and a second surface. The first groove is configured as a concave arc surface between the first surface and the second surface. The first surface extends from the first end to the first groove, and the second surface extends from the first groove to the second shaft segment. The radial dimension of the first surface is not greater than the radial dimension of the second surface.

6. The roller assembly of claim 5, wherein, The ratio of the outer diameter D1 of the second surface to the inner diameter D2 of the roller portion satisfies: 0.6≤D1 / D2≤0.

75.

7. The roller assembly of claim 4, wherein, The outer peripheral surface of the second shaft segment includes a third surface connected to the outer peripheral surface of the first shaft segment and configured as an arc shape that gradually slopes outward radially in a direction away from the first end, and the second groove is formed between the third surface and the outer peripheral surface of the first shaft segment.

8. The roller assembly of any one of claims 1-7, wherein, The roller portion includes a first portion and a second portion. The first portion extends from one end edge of the roller portion to connect with the second portion, and the third groove is provided on the inner circumferential surface of the first portion. The second portion extends from the other end edge of the roller portion to connect with the first portion. The second portion is radially recessed relative to the first portion, forming the fourth groove.

9. The roller assembly according to claim 8, characterized in that, The inner peripheral surface of the first portion includes a fourth surface and a fifth surface. The third groove is configured as a concave arc surface between the fourth surface and the fifth surface. The fourth surface extends from one end edge to the third groove, and the fifth surface extends from the third groove to the second portion. The radial dimension of the fourth surface is not less than the radial dimension of the fifth surface. And / or, the inner peripheral surface of the second portion includes a sixth surface and a seventh surface, the sixth surface being connected to the inner peripheral surface of the first portion and configured as an arc that gradually slopes outward radially away from the first portion, the seventh surface being connected to the sixth surface and extending radially to the other end edge, the sixth surface and the seventh surface cooperating to form the fourth groove.

10. The roller assembly of any one of claims 1-7, wherein, The shaft also includes a connecting frame, which is located at the second end of the shaft and configured to connect a bowl basket.

11. The roller assembly of claim 1, wherein, The roller assembly further includes a retainer disposed between the shaft portion and the roller portion, and is provided with a plurality of positioning holes for positioning the plurality of first balls and the plurality of second balls; and / or, the shaft portion is configured as a hollow cylindrical shape.

12. The roller assembly of claim 1, wherein, The ratio of the depth dimension H11 of the first groove to the diameter dimension D11' of the cross-section of the first groove satisfies: 0.05≤H11 / D11'≤0.25; And / or, the ratio of the depth dimension H12 of the second groove to the diameter dimension D12' of the cross section of the second groove satisfies: 0.35≤H12 / D12'≤0.55; And / or, the ratio of the depth dimension H21 of the third groove to the diameter dimension D21' of the cross section of the third groove satisfies: 0.15≤H21 / D21'≤0.35; And / or, the ratio of the depth dimension H22 of the fourth groove to the diameter dimension D22' of the cross section of the fourth groove satisfies: 0.35≤H22 / D22'≤0.

35.

13. A bowl basket characterized by, It includes a basket body and a roller assembly as described in any one of claims 1-12, wherein the shaft portion is connected to the basket body.

14. A dishwasher, characterized in that It includes the roller assembly as described in any one of claims 1-12; or it includes the bowl basket as described in claim 13.

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