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, wherein the end cover is rotatably arranged on the periphery of the fixed shaft in a sleeving manner; the wheel body sleeves the periphery of the end cover, the inner wall of the wheel body is in threaded connection with the outer wall of the end cover, and the inner wall of the wheel 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 in threaded connection with the wheel body 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 specifically provides a pulley and a household electrical appliance. Background Art

[0002] In daily life, many household appliances use side openings with multi-layer pull-out shelves to place items. Pulleys are usually set on the shelves, and the shelves are pulled out or pushed in by the pulleys. This design not only ensures the capacity, but also makes it convenient for users to take items.

[0003] Take a dishwasher as an example. The dishwasher is equipped with a shelf inside for placing dishes to be washed. Rollers are set on the shelf, and the shelf is pulled out or pushed in by the pulley. When using the dishwasher, the user needs to pull out the shelf of the dishwasher, place the dishes to be washed on the shelf, and then push the shelf back into the dishwasher for washing. Existing pulleys are usually composed of a fixed shaft and a rotatable wheel body arranged on the periphery of the fixed shaft. They have a simple structure and low cost. This type of pulley has defects such as large friction resistance and easy damage. When users pull out the shelf, it is easy to encounter problems such as unsmooth pulling and jamming, which is time-consuming and labor-intensive, affecting the user experience.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the storage racks of existing household appliances cannot be smoothly pulled out.

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

[0007] Fixed axis;

[0008] An end cover, the end cover is rotatably sleeved on the outer circumference of the fixed shaft;

[0009] 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 threadedly connected to 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;

[0010] A rotating member is arranged in the guide groove.

[0011] In the preferred technical solution of the pulley, a side of the end cover facing away from the rotating member is provided with an avoidance rib, a first end of the avoidance rib is connected to the end cover, and a second end thereof has a gap with the end cover in the axial direction;

[0012] A first limiting protrusion is provided on the outer wall of the second end of the avoidance rib, and a first limiting groove is provided on the end of the wheel body away from the rotating member;

[0013] The end cover can continue to rotate under the action of the avoidance rib, and when the end cover is in a fastened position, the first limiting protrusion can cooperate with the first limiting groove to fix the end cover.

[0014] In the preferred technical solution of the pulley, the end of the end cover away from the rotating member extends outward in the circumferential direction to form a protrusion, a first limiting structure is provided on a side of the protrusion close to the rotating member, and a second limiting structure is provided on a side of the wheel body away from the rotating member;

[0015] When the end cover is in the fastening position, the first limiting structure can cooperate with the second limiting structure to fix the end cover.

[0016] In the preferred technical solution of the above pulley, the first limiting structure is a second limiting protrusion, the second limiting structure is a second limiting groove, and the second limiting groove is an arc groove opened along the wheel body.

[0017] In the preferred technical solution of the above pulley, the first limiting structure is a second limiting groove, the second limiting structure is a second limiting protrusion, and the second limiting groove is an arc groove opened along the protrusion.

[0018] In the preferred technical solution of the above pulley, a first protrusion is arranged 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

[0019] 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.

[0020] In the preferred technical solution of the above pulley, the rotating member includes a ball, the number of the ball is multiple, and the multiple balls are rotatably arranged in the guide groove; or

[0021] The rotating member comprises a bearing, and the bearing is arranged in the guide groove.

[0022] In the preferred technical solution of the above pulley, an axial hole is provided on the fixed shaft.

[0023] In the preferred technical solution of the above pulley, a mounting buckle is provided on the outer wall of the fixed shaft.

[0024] In a second aspect, the utility model further provides a household appliance, which includes a storage rack and the pulley in the above preferred technical solution.

[0025] Those skilled in the art can understand that in this application, by providing an end cap that is threadedly connected to the wheel body between the fixed shaft and the wheel body, a guiding groove is formed by enclosing the inner wall of the wheel body, the end face of the end cap, and the outer wall of the fixed shaft, and a rotating member is arranged in the guiding groove to reduce the frictional resistance and improve the smoothness of pulling. In addition, the provision of the end cap can also prevent the rotating member from coming out and being damaged, thereby extending the service life of the pulley. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, in which:

[0027] Figure 1 is the cross-section of the pulley of the present utility model Figure 1 ;

[0028] Figure 2 is the structure of the pulley of the present utility model Figure 1 ;

[0029] Figure 3 is the structure of the end cap of the present utility model Figure 1 ;

[0030] Figure 4 is the structural diagram of the fixed shaft of the present utility model;

[0031] Figure 5 is the structure of the pulley of the present utility model Figure 2 ;

[0032] Figure 6 is the structure of the end cap of the present utility model Figure 2 ;

[0033] Figure 7 is the structure of the pulley of the present utility model Figure 3 ;

[0034] Figure 8 is the cross-section of the pulley of the present utility model Figure 2 ;

[0035] Figure 9 is the partial assembly cross-sectional view of the household electrical appliance of the present utility model.

[0036] Reference numerals:

[0037] 1, fixed shaft; 11, first protrusion; 12, shaft hole; 13, mounting buckle;

[0038] 2, wheel body; 21, second protrusion; 22, internal thread; 23, first limiting groove; 24, second limiting groove;

[0039] 3, end cap; 31, external thread; 32, first limiting protrusion; 33, avoiding rib; 34, protruding portion; 35, second limiting protrusion;

[0040] 4. Rotating member;

[0041] 5. Connecting rod; 51. Bending part. Detailed implementation manner

[0042] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention. For example, although the household appliance of the present invention is described by taking a dishwasher as an example in the specification, the technical solution of the present invention is not limited thereto. Those skilled in the art can apply the technical solution of the present invention to other household 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 invention.

[0043] It should be noted that in the description of the present invention, 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, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, 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 invention can be understood according to specific situations.

[0045] First, refer to Figures 1 to 8 , and describe the pulley of the present invention. Among them, Figure 1 is the cross-section of the pulley of the present invention Figure 1 ; Figure 2 is the structure of the pulley of the present invention Figure 1 ; Figure 3 is the structure of the end cap of the present invention Figure 1 ; Figure 4 is the structural diagram of the fixed shaft of the present invention; Figure 5 is the structure of the pulley of the present invention Figure 2 ; Figure 6 is the structure of the end cap of the present invention Figure 2 ; Figure 7is the structure of the pulley of the present utility model Figure 3 ; Figure 8 is the cross-section of the pulley of the present utility model Figure 2 .

[0046] As Figures 1 to 8 shown, to solve the problem that the storage rack of existing household appliances is not smooth in pulling, the pulley of this application includes a fixed shaft 1, an end cap 3, a wheel body 2 and a rotating member 4; wherein, 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 threadedly 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 guiding groove; the rotating member 4 is arranged in the guiding groove.

[0047] By arranging an end cap 3 threadedly connected to the wheel body 2 between the fixed shaft 1 and the wheel body 2 in this application, a guiding groove formed by surrounding 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 guiding groove to reduce the frictional resistance and improve the smoothness of pulling. In addition, the setting 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.

[0048] Next, with further reference to Figures 1 to 8 , a preferred embodiment of the pulley of this application will be introduced. Those skilled in the art can understand that the following introduced embodiments are only used to illustrate the principle of this application and are not intended to limit the protection scope of this application. On the premise that the pulley includes at least a fixed shaft 1, an end cap 3, a wheel body 2 and a rotating member 4, those skilled in the art can adjust the following setting methods so that this application can be applied to more specific application scenarios.

[0049] Referring to Figures 1 to 4 , the pulley includes a fixed shaft 1, an end cap 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 an internal thread 22 is provided on the inner wall of the wheel body 2. The end cap 3 is sleeved in the area between the fixed shaft 1 and the wheel body 2, and an external thread 31 is provided on the outer wall of the end cap 3. The external thread 31 is in threaded cooperation with the internal thread 22, so that the end cap 3 is threadedly connected to the wheel body 2, so that the end cap 3 can rotate around the fixed shaft 1 together with the wheel body 2. A first protrusion 11 is arranged around the outer wall of the fixed shaft 1, and a second protrusion 21 is arranged around the inner wall of the wheel body 2. The first protrusion 11 and the second protrusion 21 are arranged opposite to each other, and the end face of the end cap 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 surround and form a guiding groove, and the rotating member 4 is arranged in the guiding groove. Arranging the rotating member 4 in the guiding groove formed by surrounding 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 can prevent the rotating member 4 from coming out of the guiding groove and being damaged, and extend the service life of the pulley.

[0050] Of course, the setting of the first protrusion 11 in this application is not necessary. Those skilled in the art can flexibly select according to the actual product situation, as long as it can prevent the rotating member 4 from disengaging from the guiding groove. For example, when the first protrusion 11 is not provided, the rotating member 4 is arranged in the guiding groove formed by jointly enclosing 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.

[0051] Similarly, the setting of the second protrusion 21 in this application is not necessary. Those skilled in the art can flexibly select according to the actual product situation, as long as it can prevent the rotating member 4 from disengaging from the guiding groove. For example, when the second protrusion 21 is not provided, the rotating member 4 is arranged in the guiding groove formed by jointly enclosing 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.

[0052] Next, with reference to Figures 1 to 3 and Figures 5 to 7 , three implementation manners for the end cover 3 and the wheel body 2 to achieve limit are introduced.

[0053] In the first implementation manner, referring to Figure 2 and Figure 3 , on the side of the end cover 3 away from the rotating member 4, there is an avoidance rib 33. The first end of the avoidance rib 33 is connected to the end cover 3, and its second end has a gap with the end cover 3 in the axial direction. On the circumferential outer wall of the second end of the avoidance rib 33, there is a first limit protrusion 32, and on the end of the wheel body 2 facing away from the rotating member 4, there is a first limit groove 23 that cooperates with the first limit protrusion 32. During the installation process of the end cover 3, as the end cover 3 rotates, the first limit protrusion 32 can rotate with the end cover 3 and gradually move in the direction close to the wheel body 2; when the first limit protrusion 32 abuts against the end of the wheel body 2, due to the gap between the second end of the avoidance rib 33 and the end cover 3 in the axial direction, the avoidance rib 33 can deflect away from the wheel body 2, so that the end cover 3 can continue to rotate until the position of the first limit protrusion 32 corresponds to the position of the first limit groove 23. At this time, the first limit protrusion 32 can be stuck into the first limit groove 23, and the end cover 3 stops rotating, making the end cover 3 in a fastened position. By the abutment of the first limit protrusion 32 and the first limit groove 23, the change of the position of the end cover 3 can be restricted, and the end cover 3 can be prevented from disengaging.

[0054] In the second implementation manner, as shown in Figure 5 and Figure 6As shown, the end of the end cap 3 facing away from the rotating member 4 extends circumferentially outward to form a protruding portion 34. A second limiting groove 24 is provided on the side of the protruding portion 34 close to the rotating member 4, and a second limiting protrusion 35 cooperating with the second limiting groove 24 is provided on the side of the wheel body 2 away from the rotating member 4. When installing the end cap 3, as the end cap 3 rotates, the second limiting groove 24 can rotate together with the end cap 3 and gradually move in the direction close to the wheel body 2. During this process, the second limiting protrusion 35 can gradually insert into the second limiting groove 24; as the end cap 3 continues to rotate, the second limiting protrusion 35 moves along the set path of the second limiting groove 24 until the side wall of the second limiting protrusion 35 abuts against the groove wall of the second limiting groove 24. At this time, the end cap 3 stops rotating and is in the tightened position.

[0055] It is worth mentioning that the second limiting groove 24 is an arc-shaped groove arranged along the protruding portion 34, ensuring that the second limiting protrusion 35 can smoothly insert into the second limiting groove 24 and move along the set path of the second limiting groove 24 during the rotation of the end cap 3, so as to achieve the effect of fixing the end cap 3 in the tightened position.

[0056] In the third embodiment, as Figure 7 shown, the end of the end cap 3 facing away from the rotating member 4 extends circumferentially outward to form a protruding portion 34. A second limiting protrusion 35 is provided on the side of the protruding portion 34 close to the rotating member 4, and a second limiting groove 24 cooperating with the second limiting protrusion 35 is provided on the side of the wheel body 2 away from the rotating member 4. When installing the end cap 3, as the end cap 3 rotates, the second limiting protrusion 35 can rotate together with the end cap 3 and gradually move in the direction close to the wheel body 2; during this process, the second limiting protrusion 35 can gradually insert into the second limiting groove 24; as the end cap 3 continues to rotate, the second limiting protrusion 35 moves along the set path of the second limiting groove 24 until the side wall of the second limiting protrusion 35 abuts against the groove wall of the second limiting groove 24. At this time, the end cap 3 stops rotating and is in the tightened position.

[0057] It is worth mentioning that the second limiting groove 24 is an arc-shaped groove arranged along the end cap 3, ensuring that the second limiting protrusion 35 can smoothly insert into the second limiting groove 24 and rotate along the set path of the second limiting groove 24 during the rotation of the end cap 3, so as to achieve the effect of fixing the end cap 3 in the tightened position.

[0058] Refer to Figure 1 and Figure 2 , the rotating member 4 is a ball, and the number of balls is multiple. The multiple balls are rotatably arranged in the guide groove.

[0059] Of course, the present application does not limit the material, the set number, and the size of the balls. Those skilled in the art can flexibly adjust according to the actual product situation. Among them, 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 set number and size of the balls according to the size of the guide groove. For example, 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.

[0060] 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), and the cage is arranged in the guide groove. Ball grooves are evenly spaced circumferentially 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 settings, firstly, the number of balls can be reduced, and the cost can be lowered; secondly, it can also avoid friction and collision between the balls, resulting in ball wear and noise generation; thirdly, it can also make the balls evenly arranged, so that the load distribution is uniform.

[0061] In an exemplary embodiment, as Figure 8 shown, the rotating member 4 can also be a bearing, and the bearing is arranged in the guide groove.

[0062] Referring to 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 outer wall of the side of the fixed shaft 1 away from the end cover 3 (such as the right side in Figure 1 ), there is also an installation buckle 13. 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.

[0063] It should be noted that the setting position of the installation buckle 13 in the present application is not fixed. Those skilled in the art can flexibly adjust according to actual needs. 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 the left side in Figure 1 ).

[0064] In addition, the present application also discloses a household electrical appliance, which includes a storage rack and the pulley according to any of the above embodiments. The pulley is arranged on the storage rack, so that the storage rack can be pulled out or pushed in by relying on the pulley.

[0065] Next, with reference to Figure 9 , the household electrical appliance of the present utility model will be described. Among them, Figure 9 is a partial assembly sectional view of the household electrical appliance of the present utility model.

[0066] Referring to Figure 9, 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 set the pulley on the storage rack. Through the above structural arrangement, on the one hand, it can prevent the pulley from falling off 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.

[0067] Finally, it should be noted that the pulley of the present invention can be applied not only to dishwashers, but also to disinfection cabinets, drawer-type washing machines, etc., and even other household electrical appliances with a drawer-type storage form. Such an adjustment of the application object does not deviate from the principle and scope of the present invention.

[0068] So far, the technical solution of the present invention has been described in conjunction 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 invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, 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 fall within the protection scope of the present invention.

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 threadedly connected to 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 side of the end cover facing away from the rotating member is provided with an avoidance rib, a first end of the avoidance rib is connected to the end cover, and a second end thereof has a gap with the end cover in the axial direction; A first limiting protrusion is provided on the outer wall of the second end of the avoidance rib, and a first limiting groove is provided on the end of the wheel body away from the rotating member; The end cover can continue to rotate under the action of the avoidance rib, and when the end cover is in a fastened position, the first limiting protrusion can cooperate with the first limiting groove to fix the end cover.

3. The pulley according to claim 1, characterized in that The end portion of the end cover away from the rotating member extends outwardly in the circumferential direction to form a protrusion, a side of the protrusion close to the rotating member is provided with a first limiting structure, and a side of the wheel body away from the rotating member is provided with a second limiting structure; When the end cover is in the fastening position, the first limiting structure can cooperate with the second limiting structure to fix the end cover.

4. The pulley according to claim 3, characterized in that The first limiting structure is a second limiting protrusion, the second limiting structure is a second limiting groove, and the second limiting groove is an arc groove opened along the wheel body.

5. The pulley according to claim 3, characterized in that The first limiting structure is a second limiting groove, the second limiting structure is a second limiting protrusion, and the second limiting groove is an arc groove opened along the protrusion.

6. 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.

7. The pulley according to claim 1, characterized in that The rotating member comprises a ball, the number of the ball is multiple, and the multiple balls are rotatably arranged in the guide groove; or The rotating member comprises 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 8, 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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