Roller and dish-washing machine

Abstract

The utility model discloses a roller which comprises a roller body, a rolling bearing, a roller shaft and a pressing piece. During installation, the rolling bearing can be firstly installed in the installation groove, then the axle sequentially penetrates through the inner ring of the rolling bearing and the installation hole from back to front, and in the process, the limiting part at the rear end of the axle can abut against the inner ring and prevent the axle from continuously moving forwards. At the moment, the pressing hole of the pressing sheet is aligned with the front end of the wheel shaft, and the pressing sheet is pressed into the wheel shaft from front to back, so that the roller can be mounted. Therefore, the structure of the wheel shaft can be simplified, the wheel shaft is more convenient to produce and machine, the wheel shaft is simpler and quicker to install and operate, and the installation efficiency of the rolling wheel can be greatly improved. In addition, the utility model further discloses the dish washing machine with the idler wheel.

Description

Technical Field

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

[0002] Dishwashers typically consist of an inner tub and a dish rack. The dish rack is mounted inside the tub via casters, which not only support the rack but also facilitate its movement in and out. Existing casters generally consist of a wheel and an axle. The wheel is mounted on the axle, which is then mounted on the bottom or side of the dish rack for support. The rack's movement is achieved through a rotatable connection between the axle and the dish rack, or between the axle and the wheel.

[0003] To prevent the axle from detaching from the wheel body, existing technologies typically incorporate a spring-loaded gripper at the axle's end. When the axle passes through the wheel body, the gripper contracts under pressure; after passing through the wheel body, it expands outward, thus preventing the wheel body from separating from the axle. However, because the gripper is integrally formed with the axle, its structure is complex, leading to more complex injection molds and higher manufacturing costs. Some rollers also have a limit screw directly installed at the axle end. Each roller installation requires tightening the limit screw, which is time-consuming and results in low screw installation efficiency. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a roller that is easy to manufacture and process, convenient to install, and has high installation efficiency.

[0005] This utility model also proposes a dishwasher equipped with the aforementioned rollers.

[0006] A roller according to an embodiment of the present invention includes: a wheel body having a mounting hole extending through the wheel body in a front-to-back direction; a mounting groove having a diameter larger than the diameter of the mounting hole on the rear surface of the wheel body; a rolling bearing mounted in the mounting groove, the rolling bearing having an inner ring and an outer ring, the outer ring being fitted around the outer periphery of the inner ring; a cage being mounted between the outer ring and the inner ring; a plurality of rolling elements being rotatably mounted within the cage; the outer ring being interference-fitted with the peripheral wall of the mounting groove; and the diameter of the inner ring being smaller than the diameter of the mounting hole; and a wheel axle passing through the rolling bearing and the mounting hole. The shaft and the inner ring are fitted together and isolated from each other by the inner peripheral wall of the mounting hole; the rear end of the axle is provided with a limiting part that can abut against the inner ring and a snap-fit ​​part that can cooperate with the basket; the pressure plate has a pressure hole, the periphery of the pressure hole has a pressing structure that extends radially inward along the pressure hole, the minimum distance between the inner end of the pressing structure and the central axis of the pressure hole is less than the radius of the axle, and the rear side of the pressure plate also has a pressing surface; when the pressure hole is fitted onto the outer periphery of the axle, the pressing structure can be bent outward from front to back and press against the outer peripheral wall of the axle, and the pressing surface can press against the front periphery of the mounting hole.

[0007] The roller according to the embodiment of this utility model has at least the following beneficial effects:

[0008] By employing the roller of this embodiment, during installation, the rolling bearing is first installed into the mounting groove, and then the axle is sequentially inserted from back to front through the inner ring and mounting hole of the rolling bearing. During this process, the limiting part at the rear end of the axle abuts against the inner ring and prevents the axle from moving forward further. At this point, the pressing hole of the pressure plate is aligned with the front end of the axle, and the pressure plate is pressed into the axle from front to back, thus completing the roller installation. This invention uses a pressure plate to limit the axle, which simplifies the axle structure, makes the production and processing of the axle more convenient, and simplifies the molds required for axle processing, thereby reducing the manufacturing cost of the axle and facilitating the production and processing of the roller, thus reducing the production cost of the roller. In addition, the roller of this embodiment uses a pressure plate to limit the axle, and during installation, only the pressure plate needs to be pressed into the front end of the axle, without the need for twisting or other operations, thus making the axle installation operation simpler and faster, and greatly improving the installation efficiency of the roller.

[0009] According to some embodiments of the present invention, the pressing structure includes at least two pressing portions disposed around the periphery of the pressing hole. The pressing portions extend radially inward along the pressing hole. The minimum distance between the inner end of the pressing portion and the central axis of the pressing hole is less than the radius of the wheel axle. All the pressing portions are arranged sequentially at intervals along the circumference of the pressing hole.

[0010] According to some embodiments of the present invention, the front end of the axle has a guide portion, the radius of which is smaller than the minimum distance between the inner end of the pressing portion and the central axis of the pressing hole.

[0011] According to some embodiments of the present invention, the outer peripheral wall of the wheel axle is provided with a limiting groove located on the rear side of the guide portion, and the limiting groove is arranged along the circumference of the wheel axle; when the pressing hole is sleeved on the outer periphery of the wheel axle, the inner end of the pressing portion can press against the front inner wall of the limiting groove.

[0012] According to some embodiments of the present invention, the axle has a limiting section located behind the limiting groove. The diameter of the limiting end gradually decreases from front to back. The maximum diameter of the limiting section is greater than the diameter of the inner ring. When the limiting section is inserted into the inner ring and the mounting hole from back to front along with the axle, the limiting section can be deformed by pressure and move to the front side of the mounting hole. The limiting section can abut against the front end of the inner ring.

[0013] According to some embodiments of the present invention, a relief groove is provided on the front surface of the wheel body, the mounting hole passes through the bottom wall of the relief groove, the pressure plate, the guide part, the limiting groove, and the limiting segment are all located in the relief groove, and the pressing surface can press against the bottom wall of the relief groove.

[0014] According to some embodiments of the present invention, the inner peripheral wall of the relief groove is provided with a plurality of first reinforcing ribs, and all the first reinforcing ribs are arranged sequentially at intervals along the circumference of the relief groove; the rear surface of the wheel body is provided with an annular groove surrounding the outer periphery of the mounting groove, and a plurality of second reinforcing ribs are provided in the annular groove, the second reinforcing ribs being connected to the inner and outer annular walls of the annular groove, and all the second reinforcing ribs are arranged sequentially at intervals along the circumference of the annular groove.

[0015] According to some embodiments of the present invention, the rear end of the axle has a mounting plate, the snap-fit ​​portion is disposed on the rear side of the mounting plate, and the limiting portion includes a plurality of third reinforcing ribs disposed on the front side of the mounting plate and connected to the outer peripheral wall of the axle. All the third reinforcing ribs are arranged sequentially at intervals along the circumference of the axle. When the axle is installed on the rolling bearing and the mounting hole, the front end of the third reinforcing rib abuts against the rear end of the inner ring.

[0016] According to some embodiments of this utility model, the snap-fit ​​part and the limiting part are integrally formed with the wheel axle, and the wheel body, the wheel axle, the inner ring, the outer ring and the retainer are all plastic parts; the pressure plate is an integrally formed metal part.

[0017] The dishwasher according to an embodiment of the present invention is provided with rollers according to any of the above embodiments.

[0018] The dishwasher according to the embodiments of the present invention has at least the following beneficial effects:

[0019] In the dishwasher of this utility model embodiment, by adopting the rollers of any of the above embodiments, the rollers are easy to manufacture and have high assembly efficiency, thereby improving the assembly efficiency of the dishwasher. Furthermore, the pressure plate in the rollers effectively limits the movement of the axle, making the roller structure more compact and stable. The rolling bearings facilitate the rolling of the rollers, reducing the risk of damage to the axle and the roller body due to pressure. This facilitates the use of the dishwasher, reduces the risk of malfunction, and makes pushing and pulling the dish racks easier and less strenuous, thus improving the user experience.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the roller according to an embodiment of the present utility model;

[0023] Figure 2 This is another schematic diagram of the roller according to an embodiment of the present utility model;

[0024] Figure 3 This is a cross-sectional schematic diagram of the roller according to an embodiment of the present utility model;

[0025] Figure 4 This is an exploded view of the roller according to an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the wheel body of the roller according to an embodiment of the present utility model;

[0027] Figure 6 This is a cross-sectional schematic diagram of the roller body according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the roller before the pressure plate is compressed according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the roller pressing plate after being compressed according to an embodiment of the present invention;

[0030] Figure 9 This is another schematic diagram of the roller pressing plate after being compressed according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the axle of the roller in an embodiment of the present invention.

[0032] Figure label:

[0033] Wheel body 100, mounting hole 110, mounting groove 120, clearance groove 130, first reinforcing rib 131, annular groove 140, second reinforcing rib 141.

[0034] Rolling bearing 200, inner ring 210, outer ring 220, rolling element 230;

[0035] Wheel axle 300, limiting part 310, third reinforcing rib 311, snap-fit ​​part 320, guide part 330, limiting groove 340, mounting plate 350;

[0036] Tablet 400, pressing hole 410, pressing part 420, pressing surface 430. Detailed Implementation

[0037] 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] Reference Figures 1 to 10This utility model provides an embodiment of a roller, including a wheel body 100, a rolling bearing 200, a wheel axle 300, and a pressure plate 400. The wheel body 100 has a mounting hole 110 that extends through the wheel body 100 in the front-to-back direction. A mounting groove 120 is formed on the rear surface of the wheel body 100, and the diameter of the mounting groove 120 is larger than the diameter of the mounting hole 110. The rolling bearing 200 is mounted in the mounting groove 120. The rolling bearing 200 has an inner ring 210 and an outer ring 220. The outer ring 220 is fitted around the outer circumference of the inner ring 210. A cage (not shown in the figure) is installed between the outer ring 220 and the inner ring 210. Multiple rolling elements 230 are rotatably mounted within the cage. The outer ring 220 is interference-fitted with the peripheral wall of the mounting groove 120. The diameter of the inner ring 210 is smaller than the diameter of the mounting hole 110. A wheel axle 300 passes through a rolling bearing 200 and a mounting hole 110. The wheel axle 300 is in contact with the inner ring 210 and is isolated from the inner peripheral wall of the mounting hole 110. The rear end of the wheel axle 300 is provided with a limiting part 310 that can abut against the inner ring 210 and a snap-fit ​​part 320 that can cooperate with the basket. The pressure plate 400 has a pressure hole 410. The periphery of the pressure hole 410 has a pressing structure that extends radially inward along the pressure hole 410. The minimum distance between the inner end of the pressing structure and the central axis of the pressure hole 410 is less than the radius of the wheel axle 300. The rear side of the pressure plate 400 also has a pressing surface 430. When the pressure hole 410 is fitted onto the outer periphery of the wheel axle 300, the pressing structure can bend outward from front to back and press against the outer peripheral wall of the wheel axle 300. The pressing surface 430 can press against the front periphery of the mounting hole 110.

[0042] By using the roller of this utility model embodiment, during installation, the rolling bearing 200 can be installed into the mounting groove 120 first. Since the mounting hole 110 penetrates the wheel body 100 in the front-to-back direction, and the diameter of the mounting groove 120 is larger than the diameter of the mounting hole 110, the mounting hole 110 is located on the inner bottom wall of the mounting groove 120 and penetrates the bottom wall of the mounting groove 120. Therefore, after the rolling bearing 200 is installed, the wheel axle 300 can be sequentially inserted from back to front into the inner ring 210 and the mounting hole 110 of the rolling bearing 200. During this process, the limiting part 310 at the rear end of the wheel axle 300 can abut against the inner ring 210 and prevent the wheel axle 300 from moving forward. At this time, the pressing hole 410 of the pressing plate 400 is aligned with the front end of the wheel axle 300 and the pressing plate 400 is pressed into the wheel axle 300 from front to back, thus completing the installation of the roller. Because the pressure plate 400 is provided with a pressure hole 410 and a pressing structure, the pressing structure is located around the pressure hole 410 and extends radially inward along the pressure hole 410. The minimum distance between the inner end of the pressing structure and the central axis of the pressure hole 410 is less than the radius of the axle 300. Therefore, during the process of pressing the pressure plate 400 into the front end of the axle 300 from front to back, the pressing structure will be subjected to the extrusion force of the axle 300 and undergo outward bending deformation from front to back. This allows the pressing structure to bend with the pressure hole 410. The outer peripheral wall of the axle 300 is tightly fitted and pressed against each other, thereby fixing the pressure plate 400 onto the axle 300. The pressing surface 430 of the pressure plate 400 presses against the front periphery of the mounting hole 110, thus preventing the axle 300 from disengaging from the mounting hole 110 of the wheel body 100 and the rolling bearing 200. This makes the connection between the axle 300 and the wheel body 100 more stable, resulting in a more stable roller structure. Compared to the prior art where an elastic claw is integrally formed at the front end of the axle 300 to limit its position, the roller in this embodiment uses the pressure plate 400 to limit the axle 300. This simplifies the structure of the axle 300, making its production and processing more convenient. The molds required for processing the axle 300 are also simpler, thus reducing the manufacturing cost of the axle 300 and facilitating the production and processing of the roller, thereby reducing the production cost of the roller. Furthermore, compared to the prior art where screws are installed at the front end of the axle 300, the roller in this embodiment of the utility model limits the axle 300 by pressing the pressure plate 400. During installation, it is only necessary to press the pressure plate 400 into the front end of the axle 300, without the need for screwing or other operations. This makes the installation of the axle 300 simpler and faster, thereby greatly improving the installation efficiency of the roller.

[0043] Furthermore, in the existing technology, since the axle 300 is usually directly inserted into the wheel body 100 and engaged with the basket, friction, compression, and collision can easily occur between the axle 300 and the basket or between the axle 300 and the wheel body 100 under the pressure of the basket during use. This leads to an increase in sliding friction between the axle 300 and the basket or between the axle 300 and the wheel body 100 during pushing and pulling. In severe cases, the axle 300 or the roller may even deform or jam, causing the wheel body 100 to be unable to roll normally and the basket to be unable to be pushed and pulled normally, which seriously affects the user experience. Therefore, the roller of this utility model embodiment, by setting a rolling bearing 200, can convert the sliding friction between the axle 300 and the wheel body 100 into rolling friction, thereby making the pushing and pulling of the basket more convenient and effortless. In addition, the outer ring 220 of the rolling bearing 200 is interference-fitted with the peripheral wall of the mounting groove 120, while the inner ring 210 is in close contact with the axle 300. By setting the diameter of the inner ring 210 to be smaller than the diameter of the mounting hole 110, when the axle 300 passes through the inner ring 210 and the mounting hole 110, the axle 300 can be isolated from the inner peripheral wall of the mounting hole 110. This can avoid friction, squeezing, collision, or jamming due to pressure deformation between the axle 300 and the wheel body 100, thereby protecting the wheel body 100 and the axle 300 and helping to extend the service life of the roller.

[0044] It is understood that the inner ring 210 is fitted to the axle 300. Specifically, in some embodiments, the inner ring 210 and the axle 300 can be interference-fitted. This not only facilitates a stable connection between the axle 300 and the rolling bearing 200, but also limits the axle 300, reducing the risk of the axle 300 coming off the mounting hole 110 when the pressure plate 400 is installed.

[0045] It is understood that the rolling element 230 in the rolling bearing 200 can be a ball or a rolling column, and this utility model does not make any specific limitation in this regard.

[0046] Reference Figures 1 to 9 In some embodiments, the pressing structure includes six pressing portions 420 disposed around the periphery of the pressing hole 410. The pressing portions 420 extend radially inward along the pressing hole 410. The minimum distance between the inner end of the pressing portion 420 and the central axis of the pressing hole 410 is less than the radius of the wheel axle 300. All pressing portions 420 are arranged sequentially at intervals along the circumference of the pressing hole 410.

[0047] By adopting the above structure, the pressing structure is divided into six pressing portions 420 located around the periphery of the pressing hole 410 and extending radially inward along the pressing hole 410. Since the minimum distance between the inner end of each pressing portion 420 and the central axis of the pressing hole 410 is less than the radius of the wheel axle 300, when the pressing plate 400 is pressed into the wheel axle 300 from front to back, the pressing portion 420 can undergo a deformation of bending outward from front to back and fit tightly against the outer peripheral wall of the wheel axle 300. By arranging the six pressing portions 420 at intervals, the pressure required for the pressing structure to deform when the pressing plate 400 is pressed into the wheel axle 300 can be reduced, making the installation of the pressing plate 400 less laborious, and thus making the installation of the roller more convenient and quick, which is conducive to further improving the installation efficiency of the roller.

[0048] It is understood that the number of pressing parts 420 can be six, two, three, four, five, seven or more, and this utility model does not make a specific limitation in this regard.

[0049] Understandably, referring to Figures 1 to 9 When the pressing structure includes multiple pressing parts 420, all pressing parts 420 can be evenly spaced along the circumference of the pressing hole 410. This allows the pressing plate 400 to be subjected to balanced force at all points during the pressing process into the wheel shaft 300, thereby enabling the pressing plate 400 to be stably pressed into the wheel shaft 300. This is beneficial to improving the stability and convenience of roller installation and facilitating the improvement of roller installation efficiency.

[0050] It is understood that, in addition to including multiple pressing parts 420, the pressing structure can also be an annular structure disposed on the periphery of the pressing hole 410 and extending radially inward along the pressing hole 410 in some embodiments. The inner end of the annular structure can be circular, elliptical, or rectangular. This utility model does not specifically limit this, as long as the minimum distance between the inner end of the annular structure and the central axis of the pressing hole 410 is less than the radius of the wheel axle 300. Specifically, when the annular structure is a circular ring structure, that is, the inner end of the annular structure is circular, the radius of the inner end of the annular structure is less than the radius of the wheel axle 300. This allows the pressing structure to undergo a deformation of bending outward from front to back and to fit tightly against the outer peripheral wall of the wheel axle 300 when the pressing plate 400 is pressed into the wheel axle 300 from front to back.

[0051] Reference Figures 1 to 10 In some embodiments, the front end of the axle 300 has a guide portion 330, the radius of which is smaller than the minimum distance between the inner end of the pressing portion 420 and the central axis of the pressing hole 410.

[0052] By adopting the above structure, the guide part 330 can guide the pressure plate 400 to be pressed in along the axial direction of the wheel axle 300. This not only makes it easier to press the pressure plate 400 into the wheel axle 300, but also makes it easier to improve the coaxiality between the pressure plate 400 and the wheel axle 300. This makes the pressure on the pressing structure more even after the pressure plate 400 is pressed into the wheel axle 300, which is beneficial to improving the stability and convenience of roller installation and improving the installation efficiency of the roller.

[0053] Understandably, in order to better guide the tablet 400 into the axle 300, the guide part 330 can be set as a tapered structure with a diameter that gradually increases from front to back.

[0054] Reference Figures 1 to 10 In some embodiments, the outer peripheral wall of the axle 300 is provided with a limiting groove 340 located behind the guide portion 330, and the limiting groove 340 is arranged along the circumference of the axle 300; when the pressing hole 410 is sleeved on the outer periphery of the axle 300, the inner end of the pressing portion 420 can press against the front inner wall of the limiting groove 340.

[0055] By adopting the above structure, during the process of pressing the pressure plate 400 into the axle 300 from front to back, the pressing structure will deform outward from front to back and fit tightly against the outer peripheral wall of the axle 300. When the inner end of the pressing part 420 moves backward to the limiting groove 340, the pressure exerted on the inner end of the pressing part 420 by the outer peripheral wall of the axle 300 will also decrease due to the reduction in the diameter of the axle 300. At this time, the inner end of the pressing part 420 will rebound inward under its own elasticity and abut against the front inner wall of the limiting groove 340. Thus, the pressure plate 400 can be limited after it is pressed into the axle 300, further preventing the pressure plate 400 from coming off the axle 300. This improves the tightness of the connection between the axle 300 and the pressure plate 400, making the roller structure more compact and stable.

[0056] Reference Figures 1 to 10 In some embodiments, the axle 300 has a limiting section (not shown in the figure) located behind the limiting groove 340. The diameter of the limiting end gradually decreases from front to back. The maximum diameter of the limiting section is greater than the diameter of the inner ring 210. When the limiting section is inserted into the inner ring 210 and the mounting hole 110 from back to front along with the axle 300, the limiting section can be deformed by pressure and move to the front side of the mounting hole 110. The limiting section can abut against the front end of the inner ring 210.

[0057] By adopting the above structure, the setting of the limiting section can further limit the wheel axle 300, preventing the wheel axle 300 from disengaging from the mounting hole 110 from front to back, thereby making the roller structure more compact and stable.

[0058] Reference Figures 1 to 10In some embodiments, a relief groove 130 is provided on the front surface of the wheel body 100, and the mounting hole 110 passes through the bottom wall of the relief groove 130. The pressure plate 400, the guide part 330, the limiting groove 340, and the limiting section are all located in the relief groove 130, and the pressing surface 430 can press against the bottom wall of the relief groove 130.

[0059] By adopting the above structure, the clearance groove 130 can accommodate the guide part 330, the limiting groove 340, and the limiting section at the front end of the pressure plate 400 and the wheel axle 300, thereby protecting the pressure plate 400 and the wheel axle 300, reducing the risk of damage to the pressure plate 400 and the wheel axle 300 due to external environmental factors during use, and thus helping to extend the service life of the roller.

[0060] Reference Figures 1 to 6 In some embodiments, the inner peripheral wall of the relief groove 130 is provided with a plurality of first reinforcing ribs 131, and all the first reinforcing ribs 131 are arranged sequentially at intervals along the circumference of the relief groove 130; the rear surface of the wheel body 100 is provided with an annular groove 140 surrounding the outer periphery of the mounting groove 120, and a plurality of second reinforcing ribs 141 are provided in the annular groove 140. The second reinforcing ribs 141 are connected to the inner annular wall and the outer annular wall of the annular groove 140, and all the second reinforcing ribs 141 are arranged sequentially at intervals along the circumference of the annular groove 140.

[0061] By adopting the above structure, since the roller needs to support the basket and other structures during use, the structural strength of the wheel body 100 is improved by setting the first reinforcing rib 131 in the relief groove 130 and the second reinforcing rib 141 in the annular groove 140. This reduces the risk of deformation under pressure during use and thus extends the service life of the roller. Furthermore, since the wheel body 100 has a mounting groove 120, the structural strength around the mounting groove 120 is relatively low. By creating the annular groove 140 around the outer periphery of the mounting groove 120, the second reinforcing rib 141 can further strengthen the structure around the rolling bearing 200, thereby extending the service life of the roller.

[0062] Understandably, in order to make the force on the wheel body 100 more even during use, all the first reinforcing ribs 131 can be evenly distributed along the circumference of the relief groove 130, and all the second reinforcing ribs 141 can be evenly distributed along the circumference of the annular groove 140.

[0063] Understandably, in order to further enhance the structural strength of the outer periphery of the rolling bearing 200, the depth of the annular groove 140 can be set to be greater than or equal to the depth of the mounting groove 120, thereby better strengthening the structure of the outer periphery of the rolling bearing 200.

[0064] Reference Figures 1 to 10 In some embodiments, the rear end of the axle 300 has a mounting plate 350, the snap-fit ​​portion 320 is provided on the rear side of the mounting plate 350, and the limiting portion 310 includes a plurality of third reinforcing ribs 311 provided on the front side of the mounting plate 350 and connected to the outer peripheral wall of the axle 300. All the third reinforcing ribs 311 are arranged sequentially at intervals along the circumference of the axle 300. When the axle 300 is installed on the rolling bearing 200 and the mounting hole 110, the front end of the third reinforcing rib 311 abuts against the rear end of the inner ring 210.

[0065] By adopting the above structure, the mounting plate 350 facilitates the layout of the snap-fit ​​part 320 and the limiting part 310 on the axle 300. Setting the snap-fit ​​part 320 on the rear side of the mounting plate 350 makes it easy to install the roller onto the basket. Setting the limiting part 310 as multiple third reinforcing ribs 311 located on the front side of the mounting plate 350 and connected to the outer peripheral wall of the axle 300 can limit the axle 300 while strengthening the structure of the axle 300, reducing the risk of the axle 300 deforming or even breaking due to the pressure of the basket.

[0066] Reference Figures 1 to 10 In some embodiments, the snap-fit ​​part 320 and the limiting part 310 are integrally formed with the wheel axle 300, and the wheel body 100, wheel axle 300, inner ring 210, outer ring 220 and cage are all plastic parts; the pressure plate 400 is an integrally formed metal part.

[0067] By adopting the above structure, the snap-fit ​​part 320 and the limiting part 310 are both integrally formed with the axle 300, which facilitates the manufacturing and processing of the axle 300, reduces the number of assembly parts during roller assembly, and greatly improves the installation efficiency of the roller. By making the wheel body 100, axle 300, inner ring 210, outer ring 220, and cage all plastic parts, the roller becomes lighter and easier to use, and the risk of rusting in long-term high-humidity environments is avoided. By making the pressure plate 400 an integrally formed metal part, it can be easily and tightly connected to the axle 300, effectively preventing the axle 300 from detaching from the wheel body 100, resulting in a more compact roller structure.

[0068] It is understood that the tablet 400 can be made of stainless steel or aluminum sheet, and this utility model does not make any specific limitation in this regard.

[0069] It is understood that the rolling element 230 can be made of plastic or stainless steel, and this utility model does not make a specific limitation in this regard.

[0070] An embodiment of this utility model also proposes a dishwasher, which is provided with the rollers of any of the above embodiments.

[0071] In the dishwasher of this utility model embodiment, by adopting the roller of any of the above embodiments, the roller is easy to manufacture and has high assembly efficiency, thereby improving the assembly efficiency of the dishwasher. Furthermore, in this roller, the pressure plate 400 can effectively limit the wheel axle 300. The pressing structure of the pressure plate 400 can bend outward from front to back under the squeezing force of the wheel axle 300 when pressed into it. This allows the pressure plate 400 to be fixedly mounted on the wheel axle 300 and prevents the wheel axle 300 from disengaging from the mounting hole 110 of the wheel body 100 and the rolling bearing 200. This makes the roller structure more compact and stable. The rolling bearing 200 facilitates the rolling of the roller, reducing the risk of damage to the wheel axle 300 and the wheel body 100 due to pressure. This facilitates the use of the dishwasher, reduces the risk of dishwasher malfunctions, and makes pushing and pulling the dish rack more convenient and effortless, thus improving the user experience.

[0072] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A roller, characterized in that The application relates to a wheel body (100) provided with a mounting hole (110) penetrating the wheel body (100) in the front-rear direction, a rear surface of the wheel body (100) being provided with a mounting groove (120) with a diameter larger than that of the mounting hole (110); a rolling bearing (200) mounted in the mounting groove (120), the rolling bearing (200) having an inner ring (210) and an outer ring (220) sleeved on the outer periphery of the inner ring (210), a retainer mounted between the outer ring (220) and the inner ring (210), and a plurality of rolling elements (230) rolling mounted in the retainer, the outer ring (220) being in interference fit with the peripheral wall of the mounting groove (120), and the diameter of the inner ring (210) being smaller than that of the mounting hole (110); a wheel shaft (300) penetrating the rolling bearing (200) and the mounting hole (110), the wheel shaft (300) being in mutual abutment with the inner ring (210) and being isolated from the inner peripheral wall of the mounting hole (110), the rear end of the wheel shaft (300) being provided with a limiting portion (310) capable of abutting against the inner ring (210) and a clamping portion (320) capable of cooperating with a basket; and a pressing piece (400) having a pressing hole (410), the peripheral edge of the pressing hole (410) being provided with abutting structures extending inward along the radial direction of the pressing hole (410), the minimum distance between the inner end of the abutting structures and the central axis of the pressing hole (410) being smaller than the radius of the wheel shaft (300), and the rear side of the pressing piece (400) being further provided with an abutting surface (430); when the pressing hole (410) is sleeved on the outer periphery of the wheel shaft (300), the abutting structures can be bent outward from front to back and abut against the outer peripheral wall of the wheel shaft (300), and the abutting surface (430) can abut against the front peripheral edge of the mounting hole (110). The abutting structures include at least two abutting portions (420) arranged on the peripheral edge of the pressing hole (410) and extending inward along the radial direction of the pressing hole (410), the minimum distance between the inner end of the abutting portions (420) and the central axis of the pressing hole (410) being smaller than the radius of the wheel shaft (300), and all the abutting portions (420) being sequentially and spacedly arranged along the circumferential direction of the pressing hole (410). The front end of the wheel shaft (300) is provided with a guide portion (330) with a radius smaller than the minimum distance between the inner end of the abutting portions (420) and the central axis of the pressing hole (410). The outer peripheral wall of the wheel shaft (300) is provided with a limiting groove (340) located at the rear side of the guide portion (330) and arranged along the circumferential direction of the wheel shaft (300); and when the pressing hole (410) is sleeved on the outer periphery of the wheel shaft (300), the inner end of the abutting portions (420) can abut against the front inner wall of the limiting groove (340). ​ ​ 2. The roller of claim 1, wherein ​ 3. The roller of claim 2, wherein ​ 4. The roller of claim 3, wherein ​ ​ 5. The roller of claim 4, wherein The wheel shaft (300) has a limiting section at the rear side of the limiting slot (340), the diameter of the limiting end gradually decreases from front to back, the maximum diameter of the limiting section is greater than the diameter of the inner ring (210), when the limiting section is inserted into the inner ring (210) and the mounting hole (110) from back to front along the wheel shaft (300), the limiting section can be deformed under pressure and move to the front side of the mounting hole (110), and the limiting section can abut against the front end of the inner ring (210).

6. The roller of claim 5, wherein The front surface of the wheel body (100) is provided with a let slot (130), the mounting hole (110) is arranged through the bottom wall of the let slot (130), the pressing piece (400), the guide part (330), the limiting slot (340) and the limiting section are all located in the let slot (130), and the pressing surface (430) can abut against the bottom wall of the let slot (130).

7. The roller of claim 6, wherein The inner circumferential wall of the let slot (130) is provided with a plurality of first reinforcing ribs (131), and all the first reinforcing ribs (131) are arranged in sequence and spaced along the circumference of the let slot (130). The rear surface of the wheel body (100) is provided with an annular groove (140) arranged around the outer circumference of the mounting groove (120), the annular groove (140) is provided with a plurality of second reinforcing ribs (141), the second reinforcing ribs (141) are connected to the inner ring wall and the outer ring wall of the annular groove (140), and all the second reinforcing ribs (141) are arranged in sequence and spaced along the circumference of the annular groove (140).

8. The roller of claim 7, wherein The rear end of the wheel shaft (300) has a mounting plate (350), the clamping part (320) is arranged at the rear side of the mounting plate (350), the limiting part (310) includes a plurality of third reinforcing ribs (311) arranged at the front side of the mounting plate (350) and connected to the outer circumferential wall of the wheel shaft (300), and all the third reinforcing ribs (311) are arranged in sequence and spaced along the circumference of the wheel shaft (300). When the wheel shaft (300) is installed in the rolling bearing (200) and the mounting hole (110), the front end of the third reinforcing rib (311) abuts against the rear end of the inner ring (210).

9. The roller of claim 1, wherein The clamping part (320) and the limiting part (310) are integrally formed with the wheel shaft (300), The wheel body (100), the wheel shaft (300), the inner ring (210), the outer ring (220) and the retainer are all plastic parts; The pressing piece (400) is an integrally formed metal part.

10. A dishwasher, characterized in that The rolling wheel is provided with any one of claims 1-9.

Images