Pulley and household appliance

Abstract

The utility model relates to the technical field of household appliances, in particular to a pulley and a household appliance, and aims to solve the problem that a storage rack of the conventional household appliance is unsmooth to pull. In order to achieve the purpose, the pulley comprises a fixed shaft, an end cover, a pulley body and a rotating piece, the end cover is rotatably arranged on the periphery of the fixed shaft in a sleeved mode, the pulley body is arranged on the periphery of the end cover in a sleeved mode, the inner wall of the pulley body is connected with the outer wall of the end cover in a clamped mode, and the inner wall of the pulley body, the end face of the end cover and the outer wall of the fixed shaft jointly form a guide groove; and the rotating piece is arranged in the guide groove. The end cover connected with the wheel body in the clamped mode is arranged between the fixed shaft and the wheel body, the guide groove is defined by the inner wall of the wheel body, the end face of the end cover and the outer wall of the fixed shaft, the rotating piece is arranged in the guide groove, friction resistance is reduced, and the drawing smoothness is improved. In addition, due to the arrangement of the end cover, the rotating piece can be prevented from being disengaged and damaged, and the service life of the pulley is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, and particularly provides a pulley and a household electrical appliance. Background Art

[0002] In daily life, many household appliances are provided with side openings and multi-layer pull-out storage racks for placing items. Usually, pulleys are arranged on the storage racks, and the storage racks are pulled out or pushed in by relying on the pulleys. Such a design can not only ensure the capacity but also facilitate users to take items.

[0003] Taking a dishwasher as an example, a shelf is arranged inside the dishwasher for placing tableware to be washed; rollers are arranged on the shelf, and the shelf is pulled out or pushed in by relying on the pulleys. When a user uses the dishwasher, the user needs to pull out the shelf of the dishwasher, place the tableware to be washed on the shelf, and then push the shelf back into the dishwasher for cleaning. Existing pulleys are usually composed of a fixed shaft and a rotatable wheel body arranged on the outer periphery of the fixed shaft. The structure is simple and the cost is low. However, this type of pulley has defects such as large frictional resistance and easy damage. When the user pulls or pushes the shelf, problems such as unsmooth pulling, jamming, etc. are likely to occur, which is time-consuming and laborious and affects the user experience.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0005] The utility model aims to solve the above technical problems, that is, to solve the problem of unsmooth pulling of the storage rack of the existing household electrical appliance.

[0006] In a first aspect, the utility model provides a pulley, which comprises:

[0007] A fixed shaft;

[0008] An end cap, which is rotatably sleeved on the outer periphery of the fixed shaft;

[0009] A wheel body, which is sleeved on the outer periphery of the end cap, and the inner wall thereof is snap-fitted with the outer wall of the end cap. The inner wall of the wheel body, the end face of the end cap and the outer wall of the fixed shaft jointly form a guiding groove;

[0010] A rotating member, which is arranged in the guiding groove.

[0011] In a preferred technical solution of the above pulley, a first protrusion is circumferentially arranged on the outer wall of the fixed shaft, and the first protrusion, the outer wall of the fixed shaft, the end face of the end cap and the inner wall of the wheel body jointly form the guiding groove; and / or

[0012] A second protrusion is disposed around the inner wall of the wheel body, and the second protrusion, the inner wall of the wheel body, the end face of the end cover, and the outer wall of the fixed shaft together form the guiding groove.

[0013] In a preferred technical solution of the above pulley, a first clamping structure is provided on the outer wall of the end cover, and a second clamping structure is provided on the inner wall of the wheel body. The first clamping structure can cooperate with the second clamping structure to enable the wheel body and the end cover to be clamped and connected.

[0014] In a preferred technical solution of the above pulley, the first clamping structure is a clamping protrusion, and the second clamping structure is a clamping groove or a clamping hole; or

[0015] The first clamping structure is a clamping groove or a clamping hole, and the second clamping structure is a clamping protrusion.

[0016] In a preferred technical solution of the above pulley, a first positioning structure is provided on the outer wall of the end cover, and a second positioning structure is provided on the inner wall of the wheel body. The first positioning structure cooperates with the second positioning structure to position the end cover.

[0017] In a preferred technical solution of the above pulley, the first positioning structure is a positioning rib, and the second positioning structure is a positioning groove; or

[0018] The first positioning structure is a positioning groove, and the second positioning structure is a positioning rib.

[0019] In a preferred technical solution of the above pulley, the rotating member is a ball, and the number of the balls is multiple. The multiple balls are rotatably disposed in the guiding groove; or

[0020] The rotating member is a bearing, and the bearing is disposed in the guiding groove.

[0021] In a preferred technical solution of the above pulley, a shaft hole is provided on the fixed shaft.

[0022] In a preferred technical solution of the above pulley, mounting buckles are provided on the outer wall of the fixed shaft.

[0023] In a second aspect, the present invention further provides a household electrical appliance, and the household electrical appliance includes the pulley in the above preferred technical solution.

[0024] Those skilled in the art can understand that, by providing an end cover clamped and connected to the wheel body between the fixed shaft and the wheel body in the present application, a guiding groove is formed by enclosing the inner wall of the wheel body, the end face of the end cover, and the outer wall of the fixed shaft, and a rotating member is disposed in the guiding groove, so as to reduce the frictional resistance and improve the smoothness of pulling. In addition, the setting of the end cover can also prevent the rotating member from falling out and causing damage, and prolong the service life of the pulley. Brief Description of the Drawings

[0025] The preferred embodiments of the present utility model will be described below in conjunction with the accompanying drawings, in which:

[0026] Figure 1 is the structural diagram of the pulley of the present utility model;

[0027] Figure 2 is the structural diagram of the end cap of the present utility model;

[0028] Figure 3 is the structural diagram of the wheel body of the present utility model;

[0029] Figure 4 is the structural diagram of the fixed shaft of the present utility model;

[0030] Figure 5 is the cross-section of the pulley of the present utility model Figure 1 ;

[0031] Figure 6 is the cross-section of the pulley of the present utility model Figure 2 ;

[0032] Figure 7 is the partial assembly cross-sectional view of the household electrical appliance of the present utility model.

[0033] Reference Signs:

[0034] 1, fixed shaft; 11, first protrusion; 12, shaft hole; 13, mounting buckle;

[0035] 2, wheel body; 21, second protrusion; 22, card slot; 23, positioning slot;

[0036] 3, end cap; 31, clamping protrusion; 311, convex block; 312, inclined surface structure; 32, positioning rib; 33, mounting hole;

[0037] 4, rotating member;

[0038] 5, connecting rod; 51, bending part. Detailed Embodiments

[0039] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model. For example, although the household electrical appliance of the present utility model is described by taking a dishwasher as an example in the specification, however, the technical solution of the present utility model is not limited thereto, and those skilled in the art can apply the technical solution of the present utility model to other household electrical appliances with a pull-out storage form according to needs, such as a disinfection cabinet, etc. Such a change in the application object does not deviate from the principle and scope of the present utility model.

[0040] It should be noted that in the description of the present utility model, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "connection", "setting", "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] First, refer to Figures 1 to 6 , and describe the pulley of the present utility model. Among them, Figure 1 is the structural diagram of the pulley of the present utility model; Figure 2 is the structural diagram of the end cap of the present utility model;

[0043] Figure 3 is the structural diagram of the wheel body of the present utility model; Figure 4 is the structural diagram of the fixed shaft of the present utility model; Figure 5 is the cross-section of the pulley of the present utility model Figure 1 ; Figure 6 is the cross-section of the pulley of the present utility model Figure 2 .

[0044] As Figures 1 to 6 shown, in order to solve the problem that the storage rack of the existing household electrical appliances is not smooth in pulling, the pulley of the present application includes a fixed shaft 1, an end cap 3, a wheel body 2 and a rotating member 4; among them, the end cap 3 is rotatably sleeved on the outer periphery of the fixed shaft 1; the wheel body 2 is sleeved on the outer periphery of the end cap 3, and its inner wall is snap-connected to the outer wall of the end cap 3. The inner wall of the wheel body 2, the end face of the end cap 3 and the outer wall of the fixed shaft 1 jointly form a guide groove; the rotating member 4 is arranged in the guide groove.

[0045] In the present application, by arranging an end cap 3 that is snap-connected to the wheel body between the fixed shaft 1 and the wheel body 2, a guide groove formed by enclosing the inner wall of the wheel body 2, the end face of the end cap 3 and the outer wall of the fixed shaft 1 is formed, and a rotating member 4 is arranged in the guide groove to reduce the frictional resistance and improve the smoothness of pulling. In addition, the arrangement of the end cap 3 can also prevent the rotating member 4 from coming out and being damaged, and extend the service life of the pulley.

[0046] The following further refers to Figures 1 to 6 and introduces a preferred embodiment of the pulley of the present application. Those skilled in the art can understand that the embodiments introduced below are only used to illustrate the principle of the present application and are not intended to limit the protection scope of the present application. On the premise that the pulley at least includes a fixed shaft 1, an end cover 3, a wheel body 2 and a rotating member 4, those skilled in the art can adjust the following setting methods so that the present application can be applied to more specific application scenarios.

[0047] Referring to Figures 1 to 5 , the pulley includes a fixed shaft 1, an end cover 3, a wheel body 2 and a rotating member 4; the wheel body 2 is rotatably sleeved on the outer periphery of the fixed shaft 1, and a plurality of card slots 22 are circumferentially spaced on the inner wall of the wheel body 2. The end cover 3 is sleeved in the area between the fixed shaft 1 and the wheel body 2, and a plurality of clamping protrusions 31 are circumferentially spaced on the outer wall of the end cover 3. The clamping protrusions 31 correspond to the card slots 22 one by one and are clamped and matched, so that the end cover 3 is clamped and connected to the wheel body 2, so that the end cover 3 can rotate around the fixed shaft 1 together with the wheel body 2. A first protrusion 11 is circumferentially arranged on the outer wall of the fixed shaft 1, a second protrusion 21 is circumferentially arranged on the inner wall of the wheel body 2, the first protrusion 11 and the second protrusion 21 are oppositely arranged, and the end face of the end cover 3, the outer wall of the fixed shaft 1, the first protrusion 11, the second protrusion 21 and the inner wall of the wheel body 2 jointly enclose a guide groove, and the rotating member 4 is arranged in the guide groove. Arranging the rotating member 4 in the guide groove formed by the inner wall of the wheel body 2, the end face of the end cover 3 and the outer wall of the fixed shaft 1 can prevent the rotating member 4 from falling out of the guide groove and being damaged, and extend the service life of the pulley.

[0048] Of course, the setting of the first protrusion 11 in the present application is not necessary. Those skilled in the art can flexibly select according to the actual product situation as long as the rotating member 4 can be prevented from falling out of the guide groove. For example, when the first protrusion 11 is not provided, the rotating member 4 is arranged in the guide groove formed by the end face of the end cover 3, the outer wall of the fixed shaft 1, the second protrusion 21 and the inner wall of the wheel body 2.

[0049] Similarly, the setting of the second protrusion 21 in the present application is not necessary. Those skilled in the art can flexibly select according to the actual product situation as long as the rotating member 4 can be prevented from falling out of the guide groove. For example, when the second protrusion 21 is not provided, the rotating member 4 is arranged in the guide groove formed by the end face of the end cover 3, the outer wall of the fixed shaft 1, the first protrusion 11 and the inner wall of the wheel body 2.

[0050] Referring to Figure 2 and Figure 5 , a plurality of mounting holes 33 are circumferentially spaced on the end cover 3, and 1 clamping protrusion 31 is arranged in each mounting hole 33. The clamping protrusion 31 includes a first end and a second end connected to each other, and its first end (such asFigure 2 The rear end of the mounting hole 33 is connected to the hole wall of the mounting hole 33, and the second end (such as Figure 2 The front end of the clamping protrusion 31 is arranged in the mounting hole 33 and is not connected to the mounting hole 33, so that there is a gap between the second end and the hole wall of the mounting hole 33, so that the clamping protrusion 31 can be offset under the action of force, which is convenient for the installation of the end cover 3. The second end of the clamping protrusion 31 is provided with a protrusion 311 extending to the outside thereof, and the protrusion 311 is provided with an inclined surface structure 312, and the radial dimension of the inclined surface structure 312 gradually increases from the side close to the rotating member 4 to the side away from the rotating member 4, so as to facilitate the end cover 3 to be pushed into the wheel body 2. During the process of installing the end cover 3, as the end cover 3 is pushed into the wheel body 2, the locking protrusion 31 gradually moves toward the direction close to the wheel body 2. When the protrusion 311 abuts against the end of the wheel body 2, the end cover 3 continues to be pushed in. The protrusion 311 can be pushed into the wheel body 2 under the action of the inclined structure 312, and will also be offset toward the inner side of the end cover 3 due to the squeezing of the inner wall of the wheel body 2, so that the end cover 3 can continue to be pushed in until the protrusion 311 is inserted into the locking groove 22. At this time, the end cover 3 no longer moves and is in the installation position.

[0051] In an alternative embodiment, the clamping protrusion 31 can also be arranged circumferentially around the outer wall of the end cover 3, and the clamping groove 22 can also be arranged circumferentially around the inner wall of the wheel body 2. Figure 6 As shown, a snap-in protrusion 31 is circumferentially arranged around the outer wall of the end cover 3, and a snap-in groove 22 is circumferentially arranged around the inner wall of the wheel body 2. The snap-in protrusion 31 snaps into the snap-in groove 22, so that the end cover 3 is snap-connected with the wheel body 2. In this embodiment, when the end cover 3 is installed, as the end cover 3 is pushed in, both the end cover 3 and the wheel body 2 will undergo elastic deformation, so that the end cover 3 can be pushed in smoothly until the snap-in protrusion 31 is inserted into the snap-in groove 22, at which time the end cover 3 no longer moves and is in the installed position.

[0052] It can be understood by those skilled in the art that the specific form and number of the first and second clamping structures of the present application are not fixed, and those skilled in the art can flexibly adjust them according to the actual product situation. For example, a clamping protrusion can be provided on the outer wall of the end cover 3, and a clamping hole can be provided on the wheel body 2. For example, two, three or other numbers of first clamping structures can be provided at intervals in the circumferential direction of the outer wall of the end cover 3, and a corresponding number of second clamping structures can be provided at intervals in the circumferential direction of the inner wall of the wheel body 2; or, one first clamping structure can be provided circumferentially around the outer wall of the end cover 3, and one second clamping structure can be provided circumferentially around the inner wall of the wheel body 2.

[0053] See also Figure 1 and Figure 5 The rotating member 4 is a ball bearing, and the number of the ball bearings is multiple, and the multiple ball bearings are rotatably arranged in the guide groove.

[0054] Of course, the present application does not limit the material, number and size of the balls, and those skilled in the art can flexibly adjust them according to the actual product situation; wherein, the number and size of the balls are related to the size of the guide groove. For example, the material of the balls can be steel, ceramic, etc. In addition, those skilled in the art can adjust the number and size of the balls according to the size of the guide groove, such as the number of balls is 10, 12 or other numbers, and / or the size of the balls is 10 mm, 12 mm or other sizes.

[0055] It should be noted that when the rotating member 4 is a ball, the pulley may further include a cage (not shown in the figure), which is arranged in the guide groove. Ball grooves are evenly spaced around the cage, and the ball grooves correspond to the balls one by one. The balls are rotatably arranged in the ball grooves. Through the above arrangement, on the one hand, the number of balls can be reduced, and the cost can be reduced; on the other hand, friction and collision between balls can be avoided, which may cause ball wear and noise; on the third hand, the balls can be evenly arranged, so that the load is evenly distributed.

[0056] It should also be noted that the present application is not rigid in the type of the rotating member 4, and those skilled in the art can flexibly adjust it according to the actual product conditions. For example, the rotating member 4 can also be a bearing, and the bearing is arranged in the guide groove.

[0057] See also Figures 1 to 3 The outer wall of the end cover 3 is provided with a positioning rib 32, and the positioning rib 32 is arranged along the axial direction of the end cover 3 (such as Figure 2 The inner wall of the wheel body 2 is provided with a positioning groove 23 which cooperates with the positioning rib 32. The positioning groove 23 extends in the axial direction of the wheel body 2 (such as Figure 3 The end cover 3 is positioned in a manner that extends in the front-to-rear direction of the wheel body 2 and extends to the end of the wheel body 2 away from the rotating member 4, so as to facilitate the docking of the positioning rib 32 with the positioning groove 23 to achieve positioning of the end cover 3, and enable the snap-in protrusion 31 on the end cover 3 to snap-in with the snap-in groove 22 on the wheel body 2 quickly and accurately, thereby facilitating installation.

[0058] Of course, the specific forms of the first positioning structure and the second positioning structure are not fixed in the present application, and those skilled in the art can flexibly adjust them according to the actual product conditions. For example, a positioning groove is provided on the outer wall of the end cover 3, and a positioning rib is provided on the inner wall of the wheel body 2, and the positioning rib cooperates with the positioning groove, so that the end cover 3 can be positioned, and the clamping protrusion 31 on the end cover 3 can be quickly and accurately clamped with the clamping groove 22 on the wheel body 2, which is convenient for installation.

[0059] See also Figure 1 and Figure 4, a shaft hole 12 is provided on the fixed shaft 1, and the pulley can be arranged on the storage rack through the shaft hole 12. On the side of the fixed shaft 1 away from the end cover 3 (such as Figure 1 the right side in

[0060] ), an installation buckle 13 is further provided on the outer wall. The projection of the installation buckle 13 in the radial direction is located outside the projection of the wheel body 2 in the radial direction, which is convenient for connecting with the storage rack. Figure 1 For example, the installation buckle 13 can also be arranged on the side of the fixed shaft 1 close to the end cover 3 (such as

[0061] the left side in

[0062] It should be noted that the setting position of the installation buckle 13 in this application is not fixed, and those skilled in the art can flexibly adjust it according to actual needs. Figure 7 ). Figure 7 is a partial assembly sectional view of the household electrical appliance device of the present utility model.

[0063] Referring to Figure 7 , the storage rack includes a connecting rod 5. The connecting rod 5 is clamped in the installation buckle 13. The end of the connecting rod 5 is bent towards the direction close to the shaft hole 12 to form a bent portion 51. The bent portion 51 is inserted into the shaft hole 12, so as to arrange the pulley on the storage rack. Through the above structural arrangement, on the one hand, it can prevent the pulley from falling off from the connecting rod 5, and on the other hand, it can also prevent the connecting rod 5 from rotating relative to the fixed shaft 1.

[0064] Finally, it should be noted that the pulley of the present utility model can not only be applied to dishwashers, but also to disinfection cabinets, drawer-type washing machines, etc., and even other household electrical appliance devices with a pull-out storage form. Such an adjustment of the application object does not deviate from the principle and scope of the present utility model.

[0065] So far, the technical solution of the present utility model has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A pulley, characterized in that: The pulley comprises: Fixed axis; An end cover, the end cover is rotatably sleeved on the outer circumference of the fixed shaft; A wheel body, wherein the wheel body is sleeved on the outer periphery of the end cover, and the inner wall of the wheel body is snap-connected with the outer wall of the end cover, and the inner wall of the wheel body, the end surface of the end cover and the outer wall of the fixed shaft jointly form a guide groove; A rotating member is arranged in the guide groove.

2. The pulley according to claim 1, characterized in that A first protrusion is disposed around the outer wall of the fixed shaft, and the first protrusion, the outer wall of the fixed shaft, the end surface of the end cover and the inner wall of the wheel body together form the guide groove; and / or A second protrusion is circumferentially arranged on the inner wall of the wheel body, and the second protrusion, the inner wall of the wheel body, the end surface of the end cover and the outer wall of the fixed shaft together form the guide groove.

3. The pulley according to claim 1, characterized in that A first clamping structure is provided on the outer wall of the end cover, and a second clamping structure is provided on the inner wall of the wheel body. The first clamping structure can cooperate with the second clamping structure so that the wheel body is clamped and connected with the end cover.

4. The pulley according to claim 3, characterized in that The first clamping structure is a clamping protrusion, and the second clamping structure is a clamping slot or a clamping hole; or The first clamping structure is a clamping slot or a clamping hole, and the second clamping structure is a clamping protrusion.

5. The pulley according to claim 1, characterized in that A first positioning structure is provided on the outer wall of the end cover, and a second positioning structure is provided on the inner wall of the wheel body. The first positioning structure cooperates with the second positioning structure to position the end cover.

6. The pulley according to claim 5, characterized in that The first positioning structure is a positioning rib, and the second positioning structure is a positioning groove; or The first positioning structure is a positioning groove, and the second positioning structure is a positioning rib.

7. The pulley according to claim 1, characterized in that The rotating member is a ball, the number of the ball is multiple, and the multiple balls are rotatably arranged in the guide groove; or The rotating member is a bearing, and the bearing is arranged in the guide groove.

8. The pulley according to claim 1, characterized in that The fixed shaft is provided with a shaft hole.

9. The pulley according to claim 1, characterized in that An installation buckle is arranged on the outer wall of the fixed shaft.

10. A household appliance, characterized in that: The household appliance comprises a storage rack and a pulley according to any one of claims 1 to 9.

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