Container wheel and container assembly

Abstract

The utility model provides a box wheel and a container assembly comprising the box wheel. The box wheel comprises a supporting seat, a rotating shaft and a bearing. The bearing comprises a bearing bush and a plurality of rolling bodies. A first interval exists between the inner peripheral wall of the side, close to the fixing part, of the rolling groove in the bearing bush and the outer peripheral wall of the rotating shaft, a second interval exists between the inner peripheral wall of the other side of the rolling groove and the outer peripheral wall of the rotating shaft, and the first interval is smaller than the second interval. And the rolling body filled in the rolling groove on the inner circumference of the bearing bush is accommodated in the first space or the second space. The first space is matched with the radial size of the rolling body, so that the rolling body positioned in the first space can be simultaneously contacted with the bearing bush and the rotating shaft. According to the box wheel, the locking phenomenon can be effectively avoided, and the service life of the box wheel can be prolonged.

Description

Technical Field

[0001] The utility model relates to the field of containers, in particular to a container wheel and a container component. Background Art

[0002] At present, in the production process of containers, it is often necessary to move the containers to the workstation of the next production line. Usually, container wheels are installed at the four corner pieces at the bottom of the container, and the container wheels move on the track to drive the container to move.

[0003] Existing box wheels are often filled with lubricating grease to reduce friction and ensure the normal operation of the box wheels. However, in the production and manufacturing process of containers, the characteristics of the electrical connection between the box wheels and the tracks are used to connect the tracks to the neutral line of the welding power supply system to form the necessary electrical circuit. When the power is turned on, current will flow through the box wheels, causing the lubricating grease in the box wheels to burn and agglomerate, thereby losing the lubricating effect and causing the bearings in the box wheels to lock. Therefore, existing box wheels have the problems of short service life and easy locking. Utility Model Content

[0004] One purpose of the utility model is to solve the deficiencies in the prior art and to provide a box wheel which can effectively avoid the bearing locking phenomenon and is conducive to prolonging the service life.

[0005] Another object of the utility model is to provide a container assembly having the above container wheels.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A container wheel, used for moving a container, comprising:

[0008] A support seat, the support seat comprising a body and a fixing portion, the body being used for detachably connecting with the bottom corner piece of the container;

[0009] A rotating shaft is rotatably connected to the fixed part through a bearing, and the rotating shaft is provided with a roller, and the rotation of the roller drives the rotating shaft to rotate;

[0010] The bearing includes a bearing shell and a plurality of rolling elements. The end of the rotating shaft is accommodated in the bearing shell. The inner circumference of the bearing shell is provided with a rolling groove. The plurality of rolling elements are loaded in the rolling groove and can circulate and roll around the rotating shaft. There is a first distance between the inner circumferential wall of the rolling groove on the side close to the fixed portion and the outer circumferential wall of the rotating shaft, and there is a second distance between the inner circumferential wall on the other side of the rolling groove and the outer circumferential wall of the rotating shaft. The first distance is smaller than the second distance. The first distance is adapted to the radial dimension of the rolling element, so that the rolling element located within the first distance can contact the bearing shell and the rotating shaft at the same time.

[0011] In an exemplary embodiment, the bearing shell includes an upper bearing shell and a lower bearing shell, and the upper bearing shell is arranged opposite to the lower bearing shell.

[0012] In an exemplary embodiment, the lower bearing shell is detachably connected to the fixing portion, and the upper bearing shell is clamped between the lower bearing shell and the fixing portion.

[0013] In an exemplary embodiment, connecting sections are extended from both ends of the lower bearing shell along an axial direction perpendicular to the rotating shaft, the connecting sections are provided with a first connecting hole, the fixing portion is provided with an assembly section cooperating with the connecting section, the assembly section is provided with a second connecting hole, and a connecting member passes through the first connecting hole and the second connecting hole to install the lower bearing shell on the fixing portion.

[0014] In an exemplary embodiment, the bottom end surface of the upper bearing shell abuts against the top end surface of the lower bearing shell, the bottom end of the fixing portion is recessed with a receiving space, the bottom end of the receiving space is protruding with a flange, the outer periphery of the upper bearing shell is recessed with a positioning groove, and the flange is received in the positioning groove, so that the upper bearing shell is firmly received in the receiving space of the fixing portion.

[0015] In an exemplary embodiment, an annular groove is formed on the outer circumference of the rotating shaft, and the annular groove is opposite to the rolling groove to form a raceway for the rolling body to roll; a plurality of the raceways are provided, and the plurality of the raceways are spaced apart along the axial direction of the bearing.

[0016] In an exemplary embodiment, at least one dust exhaust hole is formed on the lower bearing shell, and the dust exhaust hole passes through the interior of the bearing shell and the outside.

[0017] In an exemplary embodiment, the bearing further includes a sealing cover, which is disposed close to the end of the rotating shaft. The inner circumference of the bearing shell is further provided with a limiting groove, and the sealing cover is clamped in the limiting groove.

[0018] A container assembly comprises a box body, bottom corner pieces arranged at the corners of the box body, and the box wheel as described above, wherein the box wheel further comprises an assembly part, wherein the assembly part is arranged on the main body of the support seat, and the support seat is installed on the bottom corner piece through the assembly part so that the bottom plane of the bottom corner piece contacts the surface of the main body.

[0019] In an exemplary embodiment, the container wheel also includes a tail portion, which is fixedly connected to the end of the body and protrudes out of the surface of the bottom corner piece; a through hole is opened on the tail portion, and an external pulling member passes through the through hole to pull the roller to roll to move the container.

[0020] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0021] The box wheel in the utility model comprises a support seat, a roller, a rotating shaft and a bearing. The bearing comprises a bearing bush and a plurality of rolling bodies. There is a first spacing between the inner peripheral wall of the rolling groove on the bearing bush close to the fixed part and the outer peripheral wall of the rotating shaft, and there is a second spacing between the inner peripheral wall on the other side of the rolling groove and the outer peripheral wall of the rotating shaft, and the first spacing is smaller than the second spacing. The rolling bodies filled in the rolling groove are also accommodated in the first spacing or the second spacing.

[0022] The first spacing is adapted to the radial size of the rolling element, so that the rolling element at the first spacing contacts the bearing and the shaft at the same time. When the container wheel moves the container, the roller rotates and drives the shaft to rotate, and the rolling element at the first spacing rolls down to the second spacing due to the friction with the shaft and its own gravity; the second spacing is filled and the rolling element therein is pushed into the first spacing, and this cycle repeats to allow the container wheel to operate normally.

[0023] During the operation of the box wheel, the rolling element located in the second spacing is not subjected to force and rolls freely, which reduces the friction between the rolling element and the rotating shaft or the bearing, that is, reduces the wear on the rolling element, which is beneficial to prolonging the service life of the box wheel. It can be understood that the present application eliminates the filling of lubricating grease in the bearing through the improvement of the structure, so that when the power is turned on, the lubricating grease will not burn and agglomerate, which will hinder the rolling of the rolling element and cause locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a perspective view of a box wheel according to one embodiment of the present invention.

[0025] Figure 2 yes Figure 1 The box wheel is shown in an exploded view with the rollers omitted.

[0026] Figure 3 yes Figure 1 The box wheel is shown in a cross-sectional view along the AA direction.

[0027] Figure 4 yes Figure 1 The cross-sectional view of the box wheel along the BB direction is shown.

[0028] The following are the descriptions of the reference numerals:

[0029] 10. Support seat; 11. Main body; 12. Fixing part; 121. Reinforcement rib; 122. Assembly section; 123. Second connection hole; 124. Accommodation space; 125. Flange;

[0030] 20. roller; 21. groove;

[0031] 30. rotating shaft; 31. ring groove;

[0032] 40. bearing; 41. bearing shell; 411. rolling groove; 412. upper bearing shell; 4121. first rolling groove; 4122. positioning groove; 413. lower bearing shell; 4131. second rolling groove; 4132. connecting section; 4133. first connecting hole; 4134. dust discharge hole; 414. limiting groove; 42. rolling element; 43. connecting piece; 44. sealing cover;

[0033] 50. Assembly parts; 51. Via holes;

[0034] 60, tail; 61, through hole; DETAILED DESCRIPTION

[0035] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0036] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] The utility model provides a container assembly, comprising a container body, a bottom corner piece arranged at a corner of the container body, and a container wheel. The container wheel is installed on the bottom corner piece, and the container body can be driven to move by rolling to facilitate subsequent further welding and other operations on the container body.

[0039] The box wheel can effectively avoid the locking phenomenon, which is beneficial to prolonging the service life of the box wheel. The specific scheme is described by the following embodiments.

[0040] See also Figure 1 as well as Figure 2The box wheel of this embodiment includes a support seat 10, a roller 20, a rotating shaft 30 and a bearing 40. The rotating shaft 30 is rotatably connected to the support seat 10 through the bearing 40. The roller 20 is arranged on the rotating shaft 30. The rotation of the roller 20 drives the rotating shaft 30 to rotate.

[0041] The support base 10 includes a body 11 and a fixing portion 12 .

[0042] The body 11 is used to be detachably connected to the bottom corner piece of the container. Specifically, the support base 10 also includes an assembly part 50. The assembly part 50 is provided on the body 11 of the support base 10, and the support base 10 is installed on the bottom corner piece through the assembly part 50, so that the bottom plane of the bottom corner piece contacts the surface of the body 11. In other words, the box body is seated on the support base 10, and the support base 10 supports the box body.

[0043] Furthermore, a through hole 51 is provided on the assembly part 50. The bottom corner piece at the corner of the box body is hollow inside, and a plurality of through holes are provided on the outer peripheral wall. The assembly part 50 of the box wheel can pass through the through hole at the bottom end of the bottom corner piece to the inside of the bottom corner piece, and then an external mounting part can be used to pass through the through hole on one side of the bottom corner piece, the through hole 51 on the assembly part 50, and the through hole on the other side of the bottom corner piece at the same time, so that the box wheel can be installed on the box body.

[0044] The fixing portion 12 extends in a direction away from the box body. Along the axial direction of the rotating shaft 30, a reinforcing rib 121 is convexly provided on a surface of the fixing portion 12 facing outward to enhance the structural strength of the box wheel and improve the bearing capacity of the box wheel.

[0045] In some embodiments of the present application, a plurality of reinforcing ribs 121 may be provided. In this embodiment, two reinforcing ribs 121 are provided on the surface of each fixing portion 12 as an example. Figure 3 One end of each reinforcing rib 121 is connected to the body 11 of the support seat 10 , and the other end is connected to the bottom of the fixing portion 12 .

[0046] In this embodiment, two fixing parts 12 are provided. The two fixing parts 12 are fixedly connected to the body 11 and arranged opposite to each other. It should be noted that in other embodiments, the fixing parts 12 may also be provided with one, three, etc., which can be provided according to actual needs and are not limited here.

[0047] See also Figure 4 The roller 20 is disposed between the two fixing portions 12 of the support seat 10. In some examples, the outer periphery of the roller 20 may be provided with a groove 21 that matches the outer track, so that the roller 20 rolls along the extension direction of the outer track.

[0048] See also Figure 1In some embodiments of the present application, the container wheel further includes a tail portion 60, and pulling the tail portion 60 can rotate the roller 20 to achieve the movement of the container. In some embodiments, the tail portion 60 is fixedly connected to the end of the body 11, and the tail portion 60 protrudes out of the surface of the bottom corner piece. A through hole 61 is provided on the tail portion 60, and an external pulling member passes through the through hole 61 to pull the roller 20 to roll to move the container. The external pulling member can be a draw hook, a draw rope, etc.

[0049] It should be noted that, according to actual needs, the tail portion 60 includes but is not limited to the connection method with the main body 11 in the present embodiment. In other embodiments, the tail portion 60 can also be detachably connected to the main body 11. In addition, the tail portion 60 structure can also be a protrusion provided at the end of the main body 11 and exceeding the surface of the main body 11, etc. As long as the tail portion 60 can be connected to the external pulling member, the external pulling member can pull the box wheel to roll through the tail portion 60 on the box wheel, and there is no limitation here.

[0050] The rotating shaft 30 is rotatably connected to the fixing portion 12 via a bearing 40 .

[0051] See also Figure 2 In this embodiment, two bearings 40 are provided. The two bearings 40 are arranged at intervals. It can be understood that the box is located on the body 11 of the support seat 10, and then the gravity is transmitted to the bearing 40 through the fixing part 12, and then transmitted to the roller 20 through the rotating shaft 30.

[0052] It should be noted that the number of the bearings 40 is consistent with the number of the fixing parts 12. Taking the case where there is one fixing part 12 as an example, the number of the bearing 40 is also one, and the number of the rollers 20 can be two. The two rollers 20 are respectively arranged at the two ends of the rotating shaft 40.

[0053] Each bearing 40 includes a bearing bush 41 and a plurality of rolling elements 42. The bearing bush 41 is annular. The end of the rotating shaft 30 is received inside the bearing bush 41. The inner circumference of the bearing bush 41 is provided with a rolling groove 411. The plurality of rolling elements 42 are filled in the rolling groove 411 and can circulate and roll around the rotating shaft 30.

[0054] An annular groove 31 is formed on the outer periphery of the end of the rotating shaft 30 . The annular groove 31 is opposite to the rolling groove 411 to form a rolling track for the rolling body 42 .

[0055] In some embodiments, multiple raceways may be provided. Each raceway accommodates multiple rolling elements 42. Multiple rows of raceways are arranged at intervals along the axial direction of the bearing 40. The provision of multiple raceways is equivalent to widening the width of the bearing shell 41. The bottom of the fixing portion 12 connected to the bearing shell 41 also extends in the same direction as the bearing shell 41. It can be understood that the provision of multiple raceways increases the contact area between the bearing shell 41 and the support seat 10, that is, increases the force-bearing area of ​​the bearing 40, which is beneficial to improving the radial load-bearing capacity of the box wheel.

[0056] See also Figure 3 and Figure 4 There is a first spacing between the groove bottom wall of the rolling groove 411 on the side close to the fixing portion 12 and the outer peripheral wall of the rotating shaft 30, and there is a second spacing between the groove bottom wall on the other side of the rolling groove 411 and the outer peripheral wall of the rotating shaft 30. The first spacing is smaller than the second spacing. The first spacing is adapted to the radial dimension of the rolling element 42, so that the rolling element 42 located within the first spacing can contact the bearing bush 41 and the rotating shaft 30 at the same time.

[0057] For the convenience of explanation, the first spacing is Figure 4 The symbol a in the second spacing is Figure 4 The first spacing is smaller than the second spacing, which means that the value of a is smaller than the value of b.

[0058] It should be noted that the first spacing a is adapted to the radial dimension of the rolling element 42 when the box is seated on the body 11 of the support seat 10. When the box wheel is in a free state, that is, when the box wheel does not carry the box, the first spacing a can be greater than the radial dimension of the rolling element 42. The first spacing a is smaller than the second spacing b when the box is seated on the support seat 10. When the box wheel is in a free state, the first spacing a can be greater than or equal to the second spacing b.

[0059] When the external pulling member pulls the tail 60, the roller 20 rotates and drives the rotating shaft 30 to rotate. The rolling body 42 located in the first spacing rolls due to the friction with the rotating shaft 30, and falls into the second spacing due to its own gravity; the second spacing is filled and the rolling body 42 close to the first spacing is pushed into the first spacing. This cycle is repeated so that the box wheel can operate normally and the box can be moved smoothly.

[0060] It can be understood that the rolling body 42 in the second spacing rolls into the first spacing by pushing the rolling body 42 originally in the second spacing into the first spacing after the rolling body 42 in the first spacing rotates and falls to the second spacing.

[0061] During the operation of the box wheel, only the rolling bodies 42 located in the first spacing bear the load, and the rolling bodies 42 located in the second spacing are not subjected to force and roll freely, thereby reducing the friction between the rolling bodies 42 and the rotating shaft 30 or the bearing 41, that is, reducing the wear on the rolling bodies, thereby helping to extend the service life of the box wheel.

[0062] In addition, it should be noted that the bearing 40 of the box wheel in this embodiment may not be filled with lubricating medium, so as to effectively avoid the occurrence of fire caused by power-on during the manufacturing process of the container. This is equivalent to the present application improving the bearing structure to replace the filling of lubricating grease in the bearing, so that when power is turned on, the lubricating grease will not burn and agglomerate to hinder the rolling of the rolling element, thereby effectively ensuring the stable operation of the box wheel and avoiding the locking phenomenon during the operation of the box wheel. In addition, the non-filling of lubricating grease also effectively reduces the adsorption of dust.

[0063] It can be understood that the bearing 40 in the box wheel of the utility model does not have the retaining frame and separator in the traditional bearing 40, and the spacing between the rolling elements 42 is closer, so that there are more contact points with the bearing shell 41, which effectively enhances the load-bearing capacity of the bearing 40, that is, improves the load-bearing capacity of the box wheel, which is beneficial to extend the service life of the box wheel.

[0064] Preferably, the rolling element 42 in the bearing 40 in this embodiment is a cylindrical roller, which has a large radial load capacity and is conducive to improving the load-bearing capacity of the box wheel. In other embodiments, the rolling element 42 can also be a needle roller, a long cylindrical roller, a tapered roller, etc., as long as the rolling element 42 can rotate and roll in a circular manner. The specific setting can be based on actual needs and is not limited here.

[0065] Continue to see Figure 2 In this embodiment, the bearing 41 includes an upper bearing 412 and a lower bearing 413. The upper bearing 412 is arranged opposite to the lower bearing 413. The inner circumference of the upper bearing 412 is provided with a first rolling groove 4121, and the inner circumference of the lower bearing 413 is provided with a second rolling groove 4131. The rolling groove 411 on the inner circumference of the bearing 41 is formed by the first rolling groove 4121 in the upper bearing 412 and the second rolling groove 4131 in the lower bearing 413.

[0066] The first spacing a is the distance between the bottom wall of the first rolling groove 4121 and the outer peripheral wall of the rotating shaft 30 ; the second spacing b is the distance between the bottom wall of the second rolling groove 4131 and the outer peripheral wall of the rotating shaft 30 .

[0067] The radial dimension of the first rolling groove 4121 is smaller than the radial dimension of the second rolling groove 4131 , so that the first spacing a is smaller than the second spacing b.

[0068] The upper bearing 412 and the lower bearing 413 are split designs, so as to facilitate the inspection and maintenance of the bearing 40. The upper bearing 412 and the lower bearing 413 can also be an integrated design to facilitate the installation and removal of the bearing 41 and the support seat 10. It can be set according to actual needs, as long as the first spacing a formed between the upper bearing 412 and the rotating shaft 30 is smaller than the second spacing b formed between the lower bearing 413 and the rotating shaft 30 when the box wheel carries the box body, and no limitation is made here. This embodiment takes the split design of the upper bearing 412 and the lower bearing 413 as an example.

[0069] The lower bearing shell 413 is detachably connected to the fixed portion 12 of the support seat 10. Specifically, along the axial direction perpendicular to the rotating shaft 30, connecting sections 4132 are extended at both ends of the lower bearing shell 413. A first connecting hole 4133 is provided on the connecting section 4132. The fixed portion 12 is provided with an assembly section 122 that cooperates with the connecting section 4132. In other words, the assembly section 122 extends in the same direction as the connecting section 4132. A second connecting hole 123 is provided on the assembly section 122. The connecting member 43 passes through the first connecting hole 4133 and the second connecting hole 123, so that the lower bearing shell 413 can be installed on the fixed portion 12.

[0070] The upper bearing 412 is clamped between the lower bearing 413 and the fixed portion 12. Specifically, the bottom end surface of the upper bearing 412 abuts against the top end surface of the lower bearing 413. A receiving space 124 is recessed at the bottom end of the fixed portion 12. A flange 125 is protruded at the bottom end of the receiving space 124. A positioning groove 4122 is recessed on the outer periphery of the upper bearing 412. The flange 125 is received in the positioning groove 4122, so that the upper bearing 412 is stably received in the receiving space 124 of the fixed portion 12.

[0071] At least one dust discharge hole 4134 is formed on the lower bearing bush 413. The dust discharge hole 4134 passes through the bearing bush 41 and the outside, so that impurities inside the bearing bush 41 can be discharged through the dust discharge hole 4134, thereby preventing the impurities from accumulating inside the bearing bush 41 and blocking the rolling of the rolling element 42. The number of dust discharge holes 4134 can be consistent with the number of raceways inside the bearing bush 41, that is, each raceway is provided with a dust discharge hole 4134.

[0072] The bearing 40 further includes a sealing cover 44 to further effectively prevent dust, dirt, water, etc. from entering the bearing shell 41 to affect the smooth operation of the rolling element 42, thereby helping to extend the service life of the box wheel. Specifically, the sealing cover 44 is arranged near the end of the rotating shaft 30. The inner periphery of the bearing shell 41 is provided with a limiting groove 414, and the sealing cover 44 is clamped in the limiting groove 414.

[0073] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0074] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A container wheel for moving a container, characterized in that: include: A support seat, the support seat comprising a body and a fixing portion, the body being used for detachably connecting with the bottom corner piece of the container; A rotating shaft is rotatably connected to the fixed part through a bearing, and the rotating shaft is provided with a roller, and the rotation of the roller drives the rotating shaft to rotate; The bearing includes a bearing shell and a plurality of rolling elements. The end of the rotating shaft is accommodated in the bearing shell. The inner circumference of the bearing shell is provided with a rolling groove. The plurality of rolling elements are loaded in the rolling groove and can circulate and roll around the rotating shaft. There is a first distance between the inner circumferential wall of the rolling groove on the side close to the fixed portion and the outer circumferential wall of the rotating shaft, and there is a second distance between the inner circumferential wall on the other side of the rolling groove and the outer circumferential wall of the rotating shaft. The first distance is smaller than the second distance. The first distance is adapted to the radial dimension of the rolling element, so that the rolling element located within the first distance can contact the bearing shell and the rotating shaft at the same time.

2. The box wheel according to claim 1, characterized in that: The bearing shell comprises an upper bearing shell and a lower bearing shell, and the upper bearing shell is arranged opposite to the lower bearing shell.

3. The box wheel according to claim 2, characterized in that: The lower bearing shell is detachably connected to the fixing portion, and the upper bearing shell is clamped between the lower bearing shell and the fixing portion.

4. The box wheel according to claim 3, characterized in that: Along the axial direction perpendicular to the rotating shaft, connecting sections are extended from both ends of the lower bearing shell, and the connecting sections are provided with a first connecting hole. The fixing part is provided with an assembly section that cooperates with the connecting section, and the assembly section is provided with a second connecting hole. The connecting member passes through the first connecting hole and the second connecting hole to install the lower bearing shell on the fixing part.

5. The box wheel according to claim 3, characterized in that: The bottom end surface of the upper bearing shell abuts against the top end surface of the lower bearing shell, the bottom end of the fixing portion is recessed with a receiving space, the bottom end of the receiving space is protruding with a flange, the outer periphery of the upper bearing shell is recessed with a positioning groove, the flange is received in the positioning groove, so that the upper bearing shell is firmly received in the receiving space of the fixing portion.

6. The box wheel according to claim 1, characterized in that: An annular groove is formed on the outer circumference of the rotating shaft, and the annular groove is opposite to the rolling groove to form a rolling track for the rolling body to roll; a plurality of the rolling tracks are provided, and the plurality of the rolling tracks are spaced apart along the axial direction of the bearing.

7. The box wheel according to claim 2, characterized in that: At least one dust exhaust hole is formed on the lower bearing shell, and the dust exhaust hole passes through the interior of the bearing shell and the outside.

8. The box wheel according to claim 1, characterized in that: The bearing further comprises a sealing cover, which is arranged close to the end of the rotating shaft. The inner circumference of the bearing shell is further provided with a limiting groove, and the sealing cover is clamped in the limiting groove.

9. A container assembly, characterized in that: It includes a box body, a bottom corner piece arranged at the corner of the box body, and a box wheel as described in any one of claims 1 to 8, the box wheel also includes an assembly part, the assembly part is arranged on the main body of the support seat, the support seat is installed on the bottom corner piece through the assembly part, so that the bottom plane of the bottom corner piece is in contact with the surface of the main body.

10. The container assembly according to claim 9, characterized in that: The container wheel also includes a tail portion, which is fixedly connected to the end of the body and protrudes out of the surface of the bottom corner piece; a through hole is opened on the tail portion, and an external pulling member passes through the through hole to pull the roller to roll, so as to move the container.

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