CN220349413U - Universal wheel - Google Patents

Abstract

The utility model provides a universal wheel, which comprises a bolt, a supporting seat, a spherical wheel and an annular fixing ring, wherein the supporting seat is provided with an arc-shaped groove for installing the spherical wheel, the bolt is connected to one surface of the supporting seat back to the arc-shaped groove, the circumference of a first end of the bolt far away from the supporting seat is provided with external threads, the spherical wheel comprises a first part positioned in the arc-shaped groove and a second part positioned outside the arc-shaped groove, a plurality of balls are distributed between the first part and the groove wall of the arc-shaped groove, the outer side wall of the annular fixing ring is provided with external threads, the notch of the arc-shaped groove is provided with internal threads matched with the external threads, and the annular fixing ring is connected to the notch to limit the spherical wheel, and at least part of the second part penetrates through the annular fixing ring and protrudes out of the annular fixing ring. The utility model solves the problem that the universal wheel arranged at the bottom of the refrigerator body in the prior art cannot adjust the height.

Description

Universal wheel

Technical Field

The utility model relates to the field of refrigeration equipment manufacturing, in particular to a universal wheel.

Background

In the using process of the refrigerator, the refrigerator is often required to be moved to conveniently clean the lower part of the refrigerator body, so that universal wheels are required to be installed on the lower part of the refrigerator body, and the refrigerator is convenient to move.

Universal wheels produced and sold in the market at present are generally two types, one type is provided with a fixed shaft, and the spherical wheel can move along the direction perpendicular to the fixed shaft; the other is that there is no fixed shaft, and the spherical wheel can move in any direction. Both types of universal wheels are typically attached directly to the object or mounted to the object frame and therefore often cannot be adjusted in height. When the refrigerator moves to uneven ground, the situation that the refrigerator is not placed flatly or one pedal is empty exists. This will affect the stability of the refrigerator, increase the operation noise of the compressor, and thus affect the service life of the refrigerator.

Therefore, the universal wheel arranged at the bottom of the refrigerator body in the prior art has the problem that the height cannot be adjusted.

Disclosure of Invention

The utility model aims to provide a universal wheel which solves the problem that the height of the universal wheel arranged at the bottom of a refrigerator body in the prior art cannot be adjusted.

In order to achieve the above object, an embodiment of the present utility model provides a universal wheel, which includes a bolt, a supporting seat, a spherical wheel and an annular fixing ring, wherein the supporting seat is provided with an arc groove for installing the spherical wheel, the bolt is connected to a surface of the supporting seat opposite to the arc groove, a first end of the bolt far away from the supporting seat is circumferentially provided with an external thread, the spherical wheel includes a first portion located in the arc groove and a second portion located outside the arc groove, a plurality of balls are distributed between the first portion and a groove wall of the arc groove, an external thread is arranged on an outer side wall of the annular fixing ring, an internal thread matched with the external thread is arranged on a notch of the arc groove, and the annular fixing ring is connected to the notch to limit the spherical wheel, and at least a portion of the second portion is arranged through the annular fixing ring and protrudes out of the annular fixing ring.

As a further improvement of an embodiment of the present utility model, wherein the inner radius of the arcuate groove slot is greater than the radius of the spherical wheel.

As a further improvement of an embodiment of the present utility model, the annular fixing ring has a first annular surface disposed toward the inside of the arc-shaped groove and a second annular surface located at the back of the first annular surface, at least one of the first annular surface and the second annular surface has an inner radius smaller than the radius of the spherical wheel, and the second portion is disposed in the inner circles of the first annular surface and the second annular surface in a penetrating manner and at least partially protrudes out of the second annular surface.

As a further improvement of an embodiment of the present utility model, the inner radius of each of the first torus and the second torus is smaller than the radius of the spherical wheel, and the inner radius of the first torus is larger than the inner radius of the second torus.

As a further improvement of an embodiment of the present utility model, the inner side wall of the annular retainer ring is provided with a cambered surface matching with the second portion.

As a further improvement of an embodiment of the present utility model, an annular sinking step surface is disposed on a side, close to the inside of the arc-shaped groove, of the end surface of the groove wall of the arc-shaped groove, the sinking step surface is connected with the end surface through a connecting wall, the end surface, the connecting wall and the sinking step surface are sequentially connected to form the notch, and the internal thread is formed on the inner side of the connecting wall.

As a further development of an embodiment of the utility model, the second annular surface is located outside the end surface.

As a further improvement of an embodiment of the present utility model, the second end of the bolt connected to the support seat extends outwards along the radial direction of the bolt to form a flange, and the support seat is provided with a mounting groove matched with the flange.

As a further improvement of an embodiment of the present utility model, wherein the flange is provided as a regular polygon prism coaxial with the bolt.

As a further improvement of an embodiment of the present utility model, the bolt and the support seat are integrally injection molded.

Compared with the prior art, the utility model has the beneficial effects that:

the first end of the bolt is provided with external threads which can be used for being installed at the bottom of the refrigerator body and carrying out micro-adjustment on the height, so that the flatness of the refrigerator can be ensured, and the refrigerator can be conveniently moved.

Drawings

FIG. 1 is a schematic view of a universal wheel according to an embodiment of the present utility model;

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is an enlarged view of M in FIG. 3;

FIG. 5 is a schematic diagram of the explosive structure of FIG. 1;

FIG. 6 is a front view of the annular retainer ring of FIG. 5;

FIG. 7 is a schematic view of the structure in the direction B-B in FIG. 6;

FIG. 8 is a front view of the support base of FIG. 5;

fig. 9 is a cross-sectional view taken along the direction C-C in fig. 8.

The above description of the drawings includes the following reference numerals:

1. a bolt; 11. a first end; 12. a flange; 2. a support base; 21. an arc-shaped groove; 211. a notch; 2111. an end face; 2112. a sinking step surface; 2113. a connecting wall; 212. a groove wall; 22. a mounting groove; 3. a ball; 4. a spherical wheel; 41. a first portion; 42. a second portion; 5. an annular fixing ring; 51. a first torus; 52. a second torus; 53. an inner sidewall.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

In order to solve the problem that the height of the universal wheel arranged at the bottom of the refrigerator body in the prior art cannot be adjusted, one embodiment of the utility model provides the universal wheel.

As shown in fig. 1-9, an embodiment of the present utility model provides a universal wheel, including a bolt 1, a supporting seat 2, a spherical wheel 4 and an annular fixing ring 5, wherein an arc groove 21 for installing the spherical wheel 4 is provided on the supporting seat 2, the bolt 1 is connected to a surface of the supporting seat 2 opposite to the arc groove, an external thread is provided on a first end 11 of the bolt 1 far away from the supporting seat 2 in a circumferential direction, the spherical wheel 4 includes a first portion 41 located in the arc groove 21 and a second portion 42 located outside the arc groove, a plurality of balls 3 are distributed between the first portion 41 and a groove wall 212 of the arc groove 21, an external thread is provided on an outer side wall of the annular fixing ring 5, an internal thread matched with the external thread is provided on a notch of the arc groove 21, the annular fixing ring 5 is connected to a notch 211 so as to limit the spherical wheel 4, and at least a portion of the second portion 42 is provided through the annular fixing ring 5 and protrudes outside the annular fixing ring 5.

It should be noted that, in the present utility model, the groove wall of the arc-shaped groove 21 is an arc-shaped surface matching with the case of the spherical wheel 4, which may be generally configured as a certain portion of a certain spherical surface, and the plurality of balls 3 disposed between the groove wall 212 of the arc-shaped groove 21 and the first portion 41 are uniformly distributed, so that the spherical wheel 4 can better match with the plurality of balls 3 and the groove wall 212 of the arc-shaped groove 21 during the rotation process.

Through the arrangement, the first end 11 of the bolt is provided with the external thread which can be used for being installed at the bottom of the refrigerator body and can be used for micro-adjusting the height, so that the flatness of the refrigerator can be ensured, and the refrigerator can be conveniently moved.

In the above arrangement, the external thread of the annular fixing ring 5 is matched with the internal thread on the notch 211 of the arc-shaped groove 21, so that on one hand, the annular fixing ring 5 can be quickly fixed on the notch 211 to limit the spherical wheel 4, and the spherical wheel is prevented from shaking or falling off in movement; on the other hand, when the spherical wheel 4 is worn out due to long-term use and an excessive gap is generated between the spherical wheel 4 and the annular fixed ring 5, the height position of the annular fixed ring 5 can be finely adjusted in the vertical direction through the matching adjustment of the external threads on the annular fixed ring 5 and the internal threads on the notch 211, so that the problem of looseness of the spherical wheel 4 is solved.

Specifically, as shown in fig. 3 to 4, the outer side wall of the annular retainer ring 5 is provided with external threads, and the notch 211 is provided with internal threads that match the external threads on the annular retainer ring 5.

When setting up spherical wheel 4 to the inside of arc recess 21 recess, can set up through the mode of embedding, set up spherical wheel 4 to the inside of arc recess 21 in advance, then, make the cell wall 211 parcel of arc recess 21 again wrap up partial spherical wheel 4 to guarantee that spherical wheel 4 is located the position of below and wears to establish in annular retainer plate 5 and stretch out outside this annular retainer plate 5. When so arranged, the ball wheel 4 is not easily damaged, but it is noted that when so arranged, the ball wheel 4 cannot be removed from the arcuate groove 21.

Preferably, the notch 211 of the arc-shaped groove 21 may be provided in a circular shape, and as shown in fig. 3, the notch 211 may have an inner radius R1, and the inner radius R1 may be set to be larger than the radius of the spherical wheel 4, which is convenient when the spherical wheel 4 is mounted in the arc-shaped groove 21 or is taken out from the arc-shaped groove 21.

Turning specifically now to fig. 3,6 and 7, the annular retainer ring 5 has a first annular surface 51 disposed toward the inside of the arcuate recess 21 and a second annular surface 52 disposed on the back of the first annular surface 51, at least one of the first annular surface 51 and the second annular surface 52 having an inner radius smaller than the radius of the spherical wheel, and the second portion 42 extending through the inner circles of the first annular surface 51 and the second annular surface 52 and at least partially beyond the second annular surface 52.

In the present embodiment, the inner radius of the first torus 51 is R2, the inner radius of the second torus 52 is R3, and one of R2 and R3 is set smaller than the radius of the spherical wheel 4, so that when the annular retainer ring 5 is attached to the notch 211, the spherical wheel 4 cannot leak out of the first torus 51 or the second torus 52, and thus the spherical wheel 4 can be prevented from falling from the arc groove.

Alternatively, R2 and R3 may also be set to be smaller than the radius of the spherical wheel 4, and R2 is set to be larger than R3, so that when the second portion 42 is inserted into the inner circles of the first torus 51 and the second torus 52, the inner sidewall of the annular fixing ring 5 can limit the spherical wheel 4 better, avoiding shaking.

Preferably, the inner side wall 53 of the annular retainer ring 5 may be configured to be a curved surface that matches the second portion 42, so that the surface experiences less resistance during rotation of the ball wheel 4.

Turning to fig. 8-9, the arc-shaped groove 21 has a groove wall 212, one side, close to the inside of the arc-shaped groove, of an end surface 2111 of the groove wall 212 is provided with an annular sunken step surface 2112, the sunken step surface 2112 is connected with the end surface 2111 of the groove wall of the arc-shaped groove through a connecting wall 2113, the end surface 2111, the connecting wall 2113 and the sunken step surface 2112 are sequentially connected to form the notch 211, and the internal thread is formed inside the connecting wall 2113. When setting up like this, the lateral wall of annular retainer plate 5 has a part to set up in the space that sunk step face 2112 and linking wall 2113 enclose to make the lateral wall thickness of annular retainer plate 5 can set up thicker, when it carries out spacing to spherical wheel 4, can be more firm, be difficult to by the damage.

Turning next to fig. 3, the second annular surface 52 may be positioned beyond the end surface 2111 to facilitate the application of a gripping force when the annular retainer ring 5 is threaded onto the notch 211 of the arcuate recess 21.

In some embodiments, as shown in fig. 5, the second end of the bolt connected to the support base 2 extends outwards along the radial direction of the bolt to form a flange 12, and the support base 2 is provided with a mounting groove 22 matched with the flange.

Further, the flange 12 is provided in a regular polygonal prism coaxial with the bolt, and accordingly, the mounting groove 22 is also provided in a regular polygonal prism shape, so that the flange 12 can be more stably fixed in the mounting groove 22.

In some preferred embodiments, the bolt and the support base may be integrally injection molded or formed using 3D printing, so that loosening of the bolt and the support base, which may result in damage to the universal wheel, may be avoided.

In summary, the following technical effects are achieved by the embodiments of the present utility model:

firstly, the first end 11 of the bolt is provided with external threads which can be used for being installed at the bottom of a refrigerator body and for micro-adjusting the height, so that the flatness of the refrigerator can be ensured, and the refrigerator can be conveniently moved;

secondly, the external threads of the annular fixing ring 5 are matched with the internal threads on the notch 211 of the arc-shaped groove 21, so that on one hand, the annular fixing ring 5 can be quickly fixed on the notch 211 to limit the spherical wheel 4, and the spherical wheel is prevented from shaking in movement; on the other hand, when the spherical wheel 4 is worn out due to long-term use and an excessive gap is generated between the spherical wheel 4 and the annular fixed ring 5, the height position of the annular fixed ring 5 can be finely adjusted in the vertical direction through the matching adjustment of the external threads on the fixed ring and the internal threads on the notch, so that the problem of looseness of the spherical wheel 4 is solved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a universal wheel, its characterized in that, including bolt (1), supporting seat (2), spherical wheel (4) and annular retainer plate (5), be equipped with arc recess (21) of installation spherical wheel (4) on supporting seat (2), bolt (1) are connected on the one side of supporting seat (2) back to the arc recess, first end (11) circumference that supporting seat (2) was kept away from to this bolt (1) is equipped with the external screw thread, spherical wheel (4) including first part (41) and second part (42) that are located outside the arc recess that are located in arc recess (21), first part (41) with be equipped with a plurality of balls (3) between the cell wall of arc recess (21), be equipped with the external screw thread on the lateral wall of annular retainer plate (5), be equipped with on the notch of arc recess (21) with external screw thread complex internal screw thread, annular retainer plate (5) are connected in notch (211) in order to right spherical wheel (4) are spacing, at least part second part (42) wear annular protrusion (5) and stretch out outside this retainer plate (5).

2. Universal wheel according to claim 1, characterized in that the inner radius of the notch of the arc-shaped groove (21) is larger than the radius of the spherical wheel (4).

3. Universal wheel according to claim 1, characterized in that the annular securing ring (5) has a first annular surface (51) arranged towards the inside of the arcuate recess (21) and a second annular surface (52) arranged on the back of the first annular surface, at least one of the first annular surface (51) and the second annular surface (52) having an inner radius smaller than the radius of the spherical wheel (4), the second portion (42) being arranged in the inner circles of the first annular surface (51) and the second annular surface (52) and protruding at least partially beyond the second annular surface (52).

4. A castor according to claim 3, wherein the inner radius of the first (51) and second (52) torus is smaller than the radius of the ball wheel (4) and the inner radius of the first torus (51) is larger than the inner radius of the second torus (52).

5. Universal wheel according to claim 4, characterized in that the inner side wall (53) of the annular securing ring (5) is arranged as a cambered surface matching the second part (42).

6. A universal wheel according to claim 3, wherein an annular sinking step surface (2112) is arranged on one side, close to the inside of the arc-shaped groove (21), of the end surface (2111) of the groove wall (212) of the arc-shaped groove (21), the sinking step surface (2112) is connected with the end surface (2111) through a connecting wall (2113), the end surface (2111), the connecting wall (2113) and the sinking step surface (2112) are sequentially connected to form the notch (211), and the internal thread is formed inside the connecting wall (2113).

7. The universal wheel according to claim 6, wherein the second torus (52) is located outside the end face (2111).

8. Universal wheel according to claim 1, characterized in that the second end of the bolt (1) connected to the support (2) extends outwards in the radial direction of the bolt to form a flange (12), and that the support (2) is provided with a mounting groove (22) matching the flange (12).

9. Universal wheel according to claim 8, characterized in that the flange (12) is arranged as a regular polygonal prism coaxial with the bolt.

10. Universal wheel according to claim 1, characterized in that the bolt (1) and the support seat (2) are integrally injection molded.