Rubber wheel, wheel assembly and lifting door

Abstract

The utility model relates to the technical field of industrial doors, and discloses a rubber wheel, a wheel assembly and a lifting door, the rubber wheel comprises a wheel framework and a rubber sleeve, the wheel framework is provided with a limiting hole, and the limiting hole penetrates through the end faces of the two ends of the wheel framework; the rubber sleeve is arranged on the periphery of the wheel bone and comprises a rubber ring, a first rubber edge, a second rubber edge and a connecting part, the rubber ring adheres to the outer side face of the wheel bone, the first rubber edge and the second rubber edge are connected to the two ends of the rubber ring respectively, the first rubber edge and the second rubber edge adhere to the end faces of the two ends of the wheel bone respectively, and the connecting part penetrates through the limiting hole; the two ends of the connecting part are connected with the first rubber edge and the second rubber edge respectively, so that the rubber sleeve is locked on the wheel bone, the degumming risk of the first rubber edge and the second rubber edge is reduced, the rubber wheel is prevented from loosening or leaking, and the service life of the rubber wheel is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial doors, in particular to a rubber wheel, a wheel assembly and a lifting door. Background Art

[0002] The lifting door is an industrial door used in industrial plants. It is widely used as a factory door because of its high sealing and safety performance.

[0003] The lifting door includes components such as a door body assembly, a wheel assembly and a door frame. The door body assembly includes multiple door panels. The wheel assembly includes a wheel axle, a first bearing sleeved on the wheel axle and an outer wheel sleeved on the first bearing. During assembly, two adjacent door panels are hinged by hinges, the wheel axle of the wheel assembly is inserted into the hinge hole of the hinge, and the outer wheel of the wheel assembly is installed in the guide rail in the door frame to complete the assembly. During the process of opening and closing the door, the outer wheel of the wheel assembly rotates in the guide rail, causing the door body assembly to move up and down in the guide rail to form an opening and closing action.

[0004] However, during the process of opening and closing the door, the outer wheel of the wheel assembly rotates continuously, causing the outer wheel to become loose and the glue to escape, thus affecting the service life of the wheel assembly. Utility Model Content

[0005] The embodiments of the utility model aim to provide a rubber wheel, a wheel assembly and a lifting door, so as to solve the technical problem in the prior art that the outer wheel of the wheel assembly is prone to rubber leakage.

[0006] The embodiment of the utility model solves the technical problem by adopting the following technical solution: providing a rubber wheel, comprising:

[0007] A wheel bone, wherein a limiting hole is provided on the wheel bone, and the limiting hole passes through both end surfaces of the wheel bone;

[0008] A rubber sleeve, wherein the rubber sleeve is arranged on the outer periphery of the wheel frame, the rubber sleeve comprises a rubber ring, a first rubber edge, a second rubber edge and a connecting portion, the rubber ring is bonded to the outer side surface of the wheel frame, the first rubber edge and the second rubber edge are respectively connected to the two ends of the rubber ring, and the first rubber edge and the second rubber edge are respectively bonded to the two end surfaces of the wheel frame, the connecting portion is passed through the limiting hole, and the two ends of the connecting portion are respectively connected to the first rubber edge and the second rubber edge.

[0009] In some embodiments, the cross-section of the limiting hole includes a narrowing section, and the width of the narrowing section gradually decreases from the center of the wheel bone to the edge thereof.

[0010] In some embodiments, the end surfaces of both ends of the wheel bone are respectively provided with limiting grooves;

[0011] The rubber sleeve further includes a first rib and a second rib, wherein the first rib and the second rib are respectively connected to the first rubber edge and the second rubber edge, and the first rib and the second rib are respectively arranged in the corresponding limiting grooves.

[0012] In some embodiments, the wheel frame includes a frame and a convex ring protruding from the outer wall of the frame, the rubber sleeve is arranged on the outer periphery of the convex ring, the inner surface of the first rubber edge and the inner surface of the second rubber edge are respectively bonded to the end faces of the convex ring, and the limiting hole is opened on the inner periphery of the convex ring and passes through the end faces of the convex ring.

[0013] In some embodiments, an inner edge of the first adhesive edge and an inner edge of the second adhesive edge are respectively bonded to the frame.

[0014] The embodiment of the utility model also adopts the following technical solution to solve its technical problem, providing a wheel assembly, including a wheel axle, a first bearing and the rubber wheel described in any of the above embodiments;

[0015] The first bearing is sleeved on the wheel shaft, and the rubber wheel is sleeved on the first bearing.

[0016] In some embodiments, a first limiting ring is convexly provided on the inner wall of the wheel bone, and a second limiting ring is convexly provided on the outer wall of the wheel axle;

[0017] There are two first bearings, one of which is arranged between the first limiting ring and the second limiting ring, and the other of which is arranged between the first limiting ring and the shaft end of the wheel axle.

[0018] The embodiment of the utility model also adopts the following technical solution to solve its technical problem, providing a lifting door, including the wheel assembly described in any of the above embodiments.

[0019] In some embodiments, the lifting door further comprises a column, a door assembly and a guide wheel assembly;

[0020] A guide rail is provided in the column, and the guide rail includes a base plate, two side plates and two limit plates, the two side plates are connected to the two sides of the base plate, the two limit plates are respectively connected to the side of the two side plates away from the base plate, and the limit plates are arranged opposite to the base plate, and the base plate, the two side plates and the two limit plates are surrounded to form a guide groove;

[0021] The wheel axle is connected to the door body assembly, and the rubber wheel is arranged in the guide groove and rollingly cooperates with the side plate;

[0022] The guide wheel assembly includes a connecting shaft and a limiting wheel, one end of the connecting shaft is connected to the door body assembly, the limiting wheel is sleeved on the other end of the connecting shaft, the limiting wheel includes a wheel body, a connecting ring and a limiting ring connected in sequence, the wheel body is arranged in the guide groove and rollingly cooperates with the side plate, the connecting ring is arranged between the two limiting plates and has a clearance fit with the limiting plates, the limiting ring is arranged on the outside of the guide groove, and the limiting plate is located between the limiting ring and the wheel body;

[0023] The distance between the limiting ring and the limiting plate is smaller than the distance between the wheel body and the base plate, and smaller than the distance between the rubber wheel and the base plate.

[0024] Compared with the prior art, in the wheel assembly and lifting door provided in the embodiments of the utility model, matching limiting holes and connecting parts are provided on the wheel frame and the rubber sleeve, and the two ends of the connecting part are respectively connected to the first rubber edge and the second rubber edge, so that the rubber sleeve is locked on the wheel frame, reducing the risk of debonding of the first rubber edge and the second rubber edge, avoiding loosening or running of the rubber wheel, and improving the service life of the rubber wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 This is a schematic diagram of the structural decomposition of a rubber wheel provided by an embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the rubber sleeve in the embodiment of the utility model;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the rubber wheel in the embodiment of the utility model;

[0029] Figure 4 It is a three-dimensional structural schematic diagram of the wheel bone in the embodiment of the utility model;

[0030] Figure 5 It is a schematic cross-sectional structure diagram of the rubber wheel in another perspective of the embodiment of the utility model;

[0031] Figure 6 It is a schematic cross-sectional structure diagram of a wheel assembly in an embodiment of the utility model;

[0032] Figure 7 is a schematic cross-sectional structural diagram of a wheel assembly in another embodiment of the utility model;

[0033] Figure 8It is a three-dimensional structural schematic diagram of the lifting door in the embodiment of the utility model;

[0034] Fig. 9 This is a schematic diagram of the three-dimensional structure of the lifting door without the pillars in the embodiment of the utility model;

[0035] Fig.10 It is a schematic diagram of the matching relationship between the guide wheel assembly and the guide rail in the embodiment of the utility model;

[0036] Fig.11 It is a schematic diagram of the matching relationship between the wheel assembly and the guide rail in the embodiment of the utility model;

[0037] Fig.12 It is a schematic cross-sectional structure diagram of the guide wheel assembly in the embodiment of the utility model.

[0038] The reference numerals are as shown in the following table:

[0039]

[0040] DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connecting" another element, it can be directly on another element, or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0043] The following will be combined with the attached Figures 1 to 12 The rubber wheel, wheel assembly and lifting door provided in the embodiments of the utility model are described in detail.

[0044] See also Figures 1 to 3The embodiment of the utility model provides a rubber wheel 10, including a wheel frame 11 and a rubber sleeve 12. A limiting hole 110 is provided on the wheel frame 11, and the limiting hole 110 passes through the end faces 111 of the wheel frame 11. The rubber sleeve 12 is arranged on the outer periphery of the wheel frame 11. The rubber sleeve 12 includes a rubber ring 120, a first rubber edge 121, a second rubber edge 122 and a connecting portion 123. The rubber ring 120 is bonded to the outer side surface of the wheel frame 11, the first rubber edge 121 and the second rubber edge 122 are respectively connected to the two ends of the rubber ring 120, and the first rubber edge 121 and the second rubber edge 122 are respectively bonded to the end faces 111 of the wheel frame 11, the connecting portion 123 is passed through the limiting hole 110, and the two ends of the connecting portion 123 are respectively connected to the first rubber edge 121 and the second rubber edge 122.

[0045] Specifically, the rubber wheel 10 can be applied to a lifting door but is not limited thereto. For example, the rubber wheel 10 can also be applied to equipment such as a forklift and a transport truck.

[0046] The rubber wheel 10 includes a wheel frame 11 and a rubber sleeve 12, and the rubber sleeve 12 is wrapped around the outer periphery of the wheel frame 11. Optionally, the rubber sleeve 12 is thermoplastically molded on the wheel frame 11 so that the rubber sleeve 12 and the wheel frame 11 are integrally molded. After integral injection molding, the rubber ring 120 is bonded to the outer side surface of the wheel frame 11, and the first rubber edge 121 and the second rubber edge 122 are annular structures. The first rubber edge 121 and the second rubber edge 122 are respectively bonded to the end faces 111 of the wheel frame 11, and the connecting part 123 passes through the limiting hole 110 and is bonded to the hole wall of the limiting hole 110.

[0047] In this embodiment, mutually matching limiting holes 110 and connecting parts 123 are provided on the wheel frame 11 and the rubber sleeve 12, and the two ends of the connecting part 123 are respectively connected to the first rubber edge 121 and the second rubber edge 122, so that the rubber sleeve 12 is locked on the wheel frame 11, thereby improving the bonding strength of the rubber sleeve 12 on the wheel frame 11, reducing the risk of debonding of the first rubber edge 121 and the second rubber edge 122, avoiding the loosening or rubber leakage of the rubber wheel 10, and improving the service life of the rubber wheel 10.

[0048] Optionally, a plurality of limiting holes 110 are provided, and the plurality of limiting holes 110 are spaced apart along the circumferential direction of the wheel frame 11. Correspondingly, a plurality of connecting parts 123 are also provided, and the plurality of connecting parts 123 correspond one to one with the plurality of limiting holes 110. Through the limiting cooperation between the plurality of limiting holes 110 and the plurality of connecting parts 123, the rubber sleeve 12 is more firmly locked on the wheel frame 11, thereby ensuring that the rubber sleeve 12 does not loosen or leak.

[0049] Optionally, the wheel frame 11 is usually made of a high-strength metal material to improve the structural strength of the rubber wheel 10. For example, the wheel frame 11 can be made of steel, aluminum alloy, etc. The rubber sleeve 12 is usually made of a plastic material with good wear resistance to increase its service life. For example, the rubber sleeve 12 can be made of polyurethane (PU) material.

[0050] like Figure 3 As shown, in some embodiments, the cross section of the limiting hole 110 includes a narrowing section, and the width of the narrowing section gradually decreases in the direction X from the center of the wheel bone 11 to its edge.

[0051] Specifically, the cross section of the limiting hole 110 refers to the cross section of the limiting hole 110 along the axial direction perpendicular to the wheel frame 11. From the center of the wheel frame 11 to its edge direction X, the width of the narrowing section gradually decreases, limiting the movement of the connecting portion 123 along the X direction, improving the radial force stability of the rubber wheel 10, and making the rubber lagging more firm and reliable.

[0052] Alternatively, if Figure 3 As shown, the limiting hole 110 includes a first side wall 1103 and a second side wall 1104 that are oppositely disposed, and the narrowing section is located between the first side wall 1103 and the second side wall 1104 .

[0053] In some embodiments, the cross section of the limiting hole 110 also includes a first connecting section.

[0054] Optionally, the first connecting section can be connected to one end of the narrowing section close to the edge of the wheel bone 11, and the width of the first connecting section can gradually increase in the direction X from the center of the wheel bone 11 to its edge, so that the cross-section of the limiting hole 110 first changes from wide to narrow, and then from narrow to wide.

[0055] Optionally, the first connecting section can also be connected to one end of the narrowing section close to the center of the wheel bone 11, and the width of the first connecting section gradually increases from the center of the wheel bone 11 to its edge direction X, so that the cross-section of the limiting hole 110 first changes from narrow to wide, and then from wide to narrow.

[0056] In some embodiments, the cross-section of the limiting hole 110 also includes a second connecting section. The first connecting section and the second connecting section can be respectively connected to the two ends of the narrowing section, and the width of the first connecting section and the second connecting section gradually increases from the center of the wheel bone 11 to its edge direction X, so that the cross-section of the limiting hole 110 first changes from narrow to wide, then from wide to narrow, and then from narrow to wide.

[0057] In addition, the shapes of the narrowing section, the first connecting section and the second connecting section can be a straight line, an arc line, or other regular or irregular shapes. In other words, the cross-section of the limiting hole 110 can be a regular or irregular shape, for example, the cross-section of the limiting hole 110 is a straight line or an arc line.

[0058] In some embodiments, the narrowing section includes a first hole wall 1101 and a second hole wall 1102 that are arranged opposite to each other. From the center of the wheel bone 11 to its edge direction X, the first hole wall 1101 and the second hole wall 1102 gradually tilt toward the inner side of the narrowing section.

[0059] like Figure 3 As shown, the cross-section of the narrowing section is roughly trapezoidal in structure, and the narrowing section has a first hole wall 1101 and a second hole wall 1102 that are relatively arranged, and the first hole wall 1101 and the second hole wall 1102 are both inclined surfaces. The first hole wall 1101 and the second hole wall 1102 present an inner eight structure, along the radial direction of the rubber wheel 10, and from the center of the wheel frame 11 to its edge direction X, the first hole wall 1101 and the second hole wall 1102 gradually incline toward the inner side of the narrowing section, so that the distance between the first hole wall 1101 and the second hole wall 1102 gradually decreases, thereby limiting the movement of the connecting portion 123 along the X direction, ensuring the bonding strength of the rubber sleeve 12 on the wheel frame 11, and ensuring that the rubber sleeve 12 does not debond or run.

[0060] It can be understood that in other embodiments, the narrowing section may also be in other shapes, for example, the narrowing section may also be in the shape of a circular hole or a square hole.

[0061] See also Figure 4 and Figure 5 , and refer back to Figure 2 In some embodiments, the end faces 111 of the wheel frame 11 are respectively provided with limiting grooves 1110. Optionally, the limiting grooves 1110 are annular grooves. The rubber sleeve 12 also includes a first rib 124 and a second rib 125. The first rib 124 and the second rib 125 are respectively connected to the first rubber edge 121 and the second rubber edge 122. The first rib 124 and the second rib 125 are respectively arranged in the corresponding limiting grooves 1110.

[0062] like Figure 5 As shown, the first guard side 124 and the second guard side 125 are respectively connected to the inner edges of the first glue edge 121 and the second glue edge 122, and the end faces 111 at both ends of the wheel frame 11 are respectively provided with limiting grooves 1110 that cooperate with the first guard side 124 and the second guard side 125. By setting the first guard side 124 and the second guard side 125 in the corresponding limiting grooves 1110 respectively, the risk of debonding of the first glue edge 121 and the second glue edge 122 is further reduced, and the reliability of the glue encapsulation is enhanced.

[0063] In some embodiments, the wheel frame 11 includes a frame 112 and a convex ring 113 convexly provided on the outer wall of the frame 112, the rubber sleeve 12 is provided on the outer periphery of the convex ring 113, the inner surface of the first rubber edge 121 and the inner surface of the second rubber edge 122 are respectively bonded to the two end faces 111 of the convex ring 113, and the limiting hole 110 is opened on the inner periphery of the convex ring 113 and passes through the two end faces of the convex ring 113.

[0064] The wheel frame 11 includes a frame 112 and a convex ring 113. The frame 112 is a hollow cylindrical structure. The convex ring 113 is convexly arranged on the outer side of the frame 112. Optionally, the frame 112 and the convex ring 113 are integrally formed to ensure their structural strength. The rubber ring 120 is bonded to the outer side of the convex ring 113, and the first rubber edge 121 and the second rubber edge 122 are respectively bonded to the end faces 111 of the convex ring 113, so that the rubber sleeve 12 is wrapped around the outer periphery of the convex ring 113.

[0065] In some embodiments, the inner edge of the first adhesive edge 121 and the inner edge of the second adhesive edge 122 are respectively bonded to the frame 112 .

[0066] like Figure 5 As shown, the convex ring 113 is arranged on the outer side surface of the skeleton 112 and is located between the two end surfaces 111 of the skeleton 112. The inner edge of the first glue edge 121 is the side surface of the first glue edge 121 facing the skeleton 112, and the inner edge of the second glue edge 122 is the side surface of the second glue edge 122 facing the skeleton 112. By bonding the inner edge of the first glue edge 121 and the inner edge of the second glue edge 122 to the outer side surface of the skeleton 112 respectively, debonding at the inner edges of the first glue edge 121 and the second glue edge 122 can be further avoided.

[0067] See also Figure 6 and Figure 7 The embodiment of the utility model further provides a wheel assembly 100, including a wheel axle 20, a first bearing 30 and a rubber wheel 10 as in any of the above embodiments, wherein the first bearing 30 is sleeved on the wheel axle 20, and the rubber wheel 10 is sleeved on the first bearing 30.

[0068] The first bearing 30 is disposed between the wheel axle 20 and the wheel frame 11 . The arrangement of the first bearing 30 is beneficial to increasing the structural strength of the wheel assembly 100 and reducing the friction between the wheel axle 20 and the wheel frame 11 .

[0069] Since the wheel assembly 100 has the rubber wheel 10 in any of the above embodiments, it also has the beneficial effects in the above embodiments. The specific beneficial effects have been described in detail above and will not be repeated here.

[0070] In some embodiments, the first bearing 30 is integrally formed with the wheel frame 11, that is, the first bearing 30, the wheel frame 11 and the rubber sleeve 12 are integrally formed to ensure their structural strength. During the processing and preparation process, the wheel frame 11 can be thermoplastically formed on the first bearing 30 first, and then the rubber sleeve 12 can be thermoplastically formed on the wheel frame 11, so that the first bearing 30, the wheel frame 11 and the rubber sleeve 12 are integrally formed.

[0071] In some embodiments, a first limiting ring 1120 is protruding from the inner wall of the wheel frame 11, a second limiting ring 21 is protruding from the outer wall of the wheel axle 20, and there are two first bearings 30, one of which is disposed between the first limiting ring 1120 and the second limiting ring 21, and the other first bearing 30 is disposed between the first limiting ring 1120 and the axial end of the wheel axle 20, and is riveted fixed to the axial end of the wheel axle 20.

[0072] like Figure 7 As shown, the wheel assembly 100 is provided with two first bearings 30 , and a first limiting ring 1120 is provided on the inner wall of the skeleton 112 . The two first bearings 30 are separated by the first limiting ring 1120 . The two first bearings 30 are beneficial to increase the structural strength of the wheel assembly 100 .

[0073] A second limiting ring 21 is arranged on the outer wall of the wheel axle 20, wherein one first bearing 30 is arranged between the first limiting ring 1120 and the second limiting ring 21, and the other first bearing 30 is arranged on the side of the first limiting ring 1120 away from the second limiting ring 21, and is arranged close to the axial end of the wheel axle 20. During assembly, the axial end of the wheel axle 20 can be riveted to the first bearing 30 by riveting, thereby achieving fixed limitation of the first bearing 30.

[0074] Optionally, the first bearing 30 and the wheel frame 11 are designed to be split to prevent the rubber wheel 10 from moving during the riveting process of the wheel shaft 20 .

[0075] Based on the same utility model concept, the embodiment of the utility model further provides a lifting door 1000, and the lifting door 1000 includes the wheel assembly 100 as in any of the above embodiments.

[0076] Since the lifting door 1000 includes the wheel assembly 100 in any of the above embodiments, it also has the beneficial effects of any of the above embodiments. The specific beneficial effects have been described in detail above and will not be repeated here.

[0077] See also Figures 8 to 12 , wherein L1 is the vertical distance between the wheel body 4020 and the limiting plate 2012, L2 is the vertical distance between the limiting ring 4022 and the limiting plate 2012, L3 is the vertical distance between the wheel body 4020 and the base plate 2010, L4 is the vertical distance between the rubber wheel 41 and the base plate 2010, and L5 is the vertical distance between the rubber wheel 41 and the limiting plate 2012.

[0078] In some embodiments, the lifting door 1000 also includes a column 200, a door body assembly 300 and a guide wheel assembly 400. The column 200 is provided with a guide rail 201, and the guide rail includes a base plate 2010, two side plates 2011 and two limit plates 2012. The two side plates 2011 are connected to both sides of the base plate 2010, and the two limit plates 2012 are respectively connected to the side of the two side plates 2011 away from the base plate 2010, and the limit plates 2012 are arranged opposite to the base plate 2010, and the two limit plates 2012 are extended inwardly relative to the two side plates 2011. The base plate 2010, the two side plates 2011 and the two limit plates 2012 are enclosed to form a guide groove 2013, the wheel shaft 20 is connected to the door body assembly 300, the rubber wheel 10 is arranged in the guide groove 2013 and rolls with the side plates 2011, and the guide wheel assembly 400 includes a connecting rod 200, a connecting rod 2010, and a connecting rod 2011. The connecting shaft 401 and the limiting wheel 402 sleeved on the connecting shaft 401, one end of the connecting shaft 401 is connected to the door body assembly 300, and the limiting wheel 402 is sleeved on the other end of the connecting shaft 401, and the limiting wheel 402 includes a wheel body 4020, a connecting ring 4021 and a limiting ring 4022 connected in sequence, the wheel body 4020 is arranged in the guide groove 2013 and rollingly cooperates with the side plate 2011, the connecting ring 4021 is arranged between the two limiting plates 2012 and has a clearance fit with the limiting plates 2012, the limiting ring 4022 is arranged on the outside of the guide groove 2013, the limiting plate 2012 is located between the limiting ring 4022 and the wheel body 4020, and the spacing L2 between the limiting ring 4022 and the limiting plate 2012 is smaller than the spacing L3 between the wheel body 4020 and the base plate 2010, and smaller than the spacing L4 between the rubber wheel 10 and the base plate 2010.

[0079] like Figure 8 and Fig. 9 As shown, the door assembly 300 includes a plurality of door panels 301, and two adjacent door panels 301 can be hinged through the wheel axle 20 of the wheel assembly 100 or the connecting shaft 401 of the guide wheel assembly 400. The rubber wheel 10 of the wheel assembly 100 is installed in the guide groove 2013 of the guide rail 201, and the rubber wheel 10 of the wheel assembly 100 slides in the guide groove 2013 to make the door assembly 300 move up and down, thereby forming a door opening and closing action.

[0080] like Fig.10 and Fig.11As shown, when the door body assembly 300 tilts, the door body assembly 300 drives the guide wheel assembly 400 and the wheel assembly 100 to tilt. Since the distance L2 between the limit ring 4022 and the limit plate 2012 is smaller than the distance L3 between the wheel body 4020 and the base plate 2010, and smaller than the distance L4 between the rubber wheel 10 and the base plate 2010, the limit ring 4022 of the guide wheel assembly 400 preferentially contacts the limit plate 2012. The limiting cooperation between the limit plate 2012 and the limit ring 4022 hinders the further tilting of the limit wheel 402 and the rubber wheel 10, avoids the contact between the wheel body 4020 of the guide wheel assembly 400 and the rubber wheel 10 of the wheel assembly 100 and the base plate 2010, reduces the friction between the rubber wheel 10 and the guide rail 201, improves the service life of the wheel assembly 100, and reduces the noise during the operation of the lifting door 1000.

[0081] Optionally, the wheel body 4020, the connecting ring 4021 and the limiting ring 4022 are integrally formed to ensure the structural strength of the limiting wheel 402. The wheel body 4020 is a flat cylindrical structure and is arranged in the guide groove 2013. The lifting door 1000 is lifted and lowered by sliding the wheel body 4020 and the rubber wheel 10 in the guide groove 2013. The connecting ring 4021 is located between the two limit plates 2012 and has a certain gap with the two limit plates 2012 respectively to avoid wear and abnormal noise caused by contact between the connecting ring 4021 and the limit plates 2012. The limit ring 4022 is located on the outside of the guide groove 2013, that is, the limit ring 4022 is located on the side of the limit plate 2012 away from the wheel body 4020, the limit plate 2012 is located between the limit ring 4022 and the wheel body 4020, and the limit plate 2012 has a gap with the limit ring 4022 and the wheel body 4020 respectively.

[0082] Optionally, the limiting wheel 402 of the guide wheel assembly 400 is made of a material with good wear resistance to increase its service life, and the rubber wheel 10 of the wheel assembly 100 is made of a relatively quiet soft rubber material to further reduce the noise during the operation of the lifting door 1000.

[0083] like Fig.10 , Fig.11 and Fig.12 As shown, in some embodiments, the distance L1 between the wheel body 4020 and the limiting plate 2012 is equal to the distance L2 between the limiting ring 4022 and the limiting plate 2012 .

[0084] In this embodiment, the wheel body 4020 and the limiting ring 4022 are respectively located on both sides of the limiting plate 2012. The distance L1 between the wheel body 4020 and the limiting plate 2012 is equal to the distance L2 between the limiting ring 4022 and the limiting plate 2012. The distance L1 between the wheel body 4020 and the limiting plate 2012 is less than the distance L3 between the wheel body 4020 and the substrate 2010, and less than the distance L4 between the rubber wheel 10 and the substrate 2010, that is: L1 = L2, L1 < L3 and L1 < L4. When the door body assembly 300 tilts, the door body assembly 300 drives the limiting wheel 402 and the rubber wheel 10 to tilt. At this time, the wheel body 4020 and the limiting ring 4022 respectively contact the two side surfaces of the limiting plate 2012, avoiding the contact between the limiting wheel 402 and the rubber wheel 10 and the substrate 2010, and reducing the friction between the limiting wheel 402 and the rubber wheel 10 and the guide rail 201.

[0085] As Fig.10 and Fig.11 shown, in some embodiments, the distance L1 between the wheel body 4020 and the limiting plate 2012 is less than the distance L5 between the rubber wheel 10 and the limiting plate 2012.

[0086] In this embodiment, the distance L1 between the wheel body 4020 and the limiting plate 2012 is not only less than the distance L4 between the rubber wheel 10 and the substrate 2010, but also less than the distance L5 between the rubber wheel 10 and the limiting plate 2012. In this way, when the door body assembly 300 tilts, the limiting wheel 402 contacts the limiting plate 2012, not only avoiding the contact between the rubber wheel 10 and the substrate 2010, but also avoiding the contact between the rubber wheel 10 and the limiting plate 2012. Neither side end face of the rubber wheel 10 will contact the guide rail 201, further reducing the friction between the rubber wheel 10 and the guide rail 201, reducing the noise during the operation of the lifting door 100, and reducing the wear of the rubber wheel 10, improving the service life of the wheel assembly 100.

[0087] In specific applications, the lifting door 100 can use a smaller number of guide wheel assemblies 400 and a larger number of wheel assemblies 100. The limiting wheel 402 of the guide wheel assembly 400 is in limiting cooperation with the limiting plate 2012 to limit the contact between the rubber wheel 10 of the wheel assembly 100 and the guide rail 201. Since neither side end face of the rubber wheel 10 will contact the guide rail 201, the noise during the operation of the lifting door 100 can be greatly reduced.

[0088] Please refer to Fig.12 , in some embodiments, the guide wheel assembly 400 further includes a second bearing 403, and the second bearing 403 is arranged between the connecting shaft 401 and the limiting wheel 402.

[0089] As Fig.12As shown, the second bearing 403 is sleeved on the connecting shaft 401, and the limiting wheel 402 is sleeved on the outer periphery of the second bearing 403. The provision of the second bearing 403 helps to improve the overall structural strength of the guide wheel assembly 400 and reduce the friction between the connecting shaft 401 and the limiting wheel 402.

[0090] Optionally, the second bearing 403 and the limiting wheel 402 are integrally injection molded, and the limiting wheel 402 can be made of a plastic material with good wear resistance. During the injection molding process, the limiting wheel 402 is hot-melted and then wrapped around the outer periphery of the second bearing 403 to ensure the reliability of the connection between the limiting wheel 402 and the second bearing 403, and to avoid loosening, degumming, etc. of the limiting wheel 402 during use.

[0091] Optionally, there are multiple second bearings 403 to increase the structural strength of the guide wheel assembly 400. In addition, the second bearing 403 can also be designed to be separated from the limiting wheel 403.

[0092] In some embodiments, the guide wheel assembly 400 further includes a support pad 404, the limiting wheel 402 has an annular groove, the support pad 404 is disposed in the annular groove, and the support pad 404, the limiting wheel 402 and the second bearing 403 are integrally formed.

[0093] like Fig.12 As shown, an annular groove is provided on the inner surface of the limiting wheel 402, and a support pad 404 is arranged in the annular groove. The support pad 404, the second bearing 403 and the limiting wheel 402 are integrally formed. During the processing and molding process, the support pad 404 supports the limiting wheel 402 to prevent the limiting wheel 402 from shrinking and deforming during the injection molding process, thereby ensuring the accuracy of the injection molding size.

[0094] In some embodiments, guide wheel assemblies 400 are respectively provided at both ends of the upper part of the door body assembly 300. Specifically, the lifting door 1000 includes a plurality of guide wheel assemblies 400 and a plurality of wheel assemblies 100. When the door body assembly 300 tilts, the limiting wheels 402 of the guide wheel assemblies 400 located at both ends of the upper part of the door body assembly 300 preferentially contact the limiting plates 2012 and prevent the door body assembly 300 from further tilting, which can effectively prevent the guide wheel assemblies 400 and wheel assemblies 100 below from contacting the base plate 2010 and the limiting plates 2012, thereby reducing the noise during the operation of the lifting door 1000.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rubber wheel, characterized in that: include: A wheel bone, wherein a limiting hole is provided on the wheel bone, and the limiting hole passes through both end surfaces of the wheel bone; A rubber sleeve, wherein the rubber sleeve is arranged on the outer periphery of the wheel frame, the rubber sleeve comprises a rubber ring, a first rubber edge, a second rubber edge and a connecting portion, the rubber ring is bonded to the outer side surface of the wheel frame, the first rubber edge and the second rubber edge are respectively connected to the two ends of the rubber ring, and the first rubber edge and the second rubber edge are respectively bonded to the two end surfaces of the wheel frame, the connecting portion is passed through the limiting hole, and the two ends of the connecting portion are respectively connected to the first rubber edge and the second rubber edge.

2. The rubber wheel according to claim 1, characterized in that: The cross section of the limiting hole includes a narrowing section, which gradually decreases in width from the center of the wheel bone to the edge thereof.

3. The rubber wheel according to claim 1, characterized in that: The end surfaces of both ends of the wheel frame are respectively provided with limiting grooves; The rubber sleeve further includes a first rib and a second rib, wherein the first rib and the second rib are respectively connected to the first rubber edge and the second rubber edge, and the first rib and the second rib are respectively arranged in the corresponding limiting grooves.

4. The rubber wheel according to claim 1, characterized in that: The wheel frame includes a frame and a convex ring protruding from the outer wall of the frame, the rubber sleeve is arranged on the outer periphery of the convex ring, the inner surface of the first rubber edge and the inner surface of the second rubber edge are respectively bonded to the two end faces of the convex ring, and the limiting hole is opened on the inner periphery of the convex ring and passes through the two end faces of the convex ring.

5. The rubber wheel according to claim 4, characterized in that: The inner edge of the first adhesive edge and the inner edge of the second adhesive edge are respectively bonded to the frame.

6. A wheel assembly, characterized in that: It comprises a wheel axle, a first bearing and a rubber wheel as claimed in any one of claims 1 to 5; The first bearing is sleeved on the wheel shaft, and the rubber wheel is sleeved on the first bearing.

7. The wheel assembly according to claim 6, characterized in that: A first limiting ring is convexly provided on the inner wall of the wheel frame, and a second limiting ring is convexly provided on the outer wall of the wheel shaft; There are two first bearings, one of which is arranged between the first limiting ring and the second limiting ring, and the other of which is arranged between the first limiting ring and the shaft end of the wheel axle.

8. A lifting door, characterized in that: Comprising a wheel assembly as claimed in claim 6 or 7.

9. The lifting door according to claim 8, characterized in that: The lifting door also includes a column, a door body assembly and a guide wheel assembly; A guide rail is provided in the column, and the guide rail includes a base plate, two side plates and two limit plates, the two side plates are connected to the two sides of the base plate, the two limit plates are respectively connected to the side of the two side plates away from the base plate, and the limit plates are arranged opposite to the base plate, and the base plate, the two side plates and the two limit plates are surrounded to form a guide groove; The wheel axle is connected to the door body assembly, and the rubber wheel is arranged in the guide groove and rollingly cooperates with the side plate; The guide wheel assembly includes a connecting shaft and a limiting wheel, one end of the connecting shaft is connected to the door body assembly, the limiting wheel is sleeved on the other end of the connecting shaft, the limiting wheel includes a wheel body, a connecting ring and a limiting ring connected in sequence, the wheel body is arranged in the guide groove and rollingly cooperates with the side plate, the connecting ring is arranged between the two limiting plates and has a clearance fit with the limiting plates, the limiting ring is arranged on the outside of the guide groove, and the limiting plate is located between the limiting ring and the wheel body; The distance between the limiting ring and the limiting plate is smaller than the distance between the wheel body and the base plate, and smaller than the distance between the rubber wheel and the base plate.

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