Rotating wheel assembly and wheelchair

Abstract

The utility model discloses a rotating wheel assembly and a wheelchair, the rotating wheel assembly comprises a wheel carrier and a rotating wheel, the wheel carrier is annularly arranged, a hollow part is defined by the wheel carrier, a connecting part is arranged on the wheel carrier, and the connecting part and the hollow part are arranged in a staggered mode; the rotating wheel is rotatably connected to the periphery of the wheel carrier; the connecting part is used for being connected with an external power arm. The wheelchair comprises the rotating wheel assembly. The connecting part is arranged on the wheel carrier and used for being connected with the external power arm, and the connecting part and the hollow part of the wheel carrier are staggered; under the action of the external power arm, the rotating wheel can rotate relative to the wheel carrier, and the wheel carrier and the connecting part do not rotate, so that foreign matters such as hair and fibers on the ground are prevented from being wound on the connecting part.

Description

A rotating wheel assembly and a wheelchair Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a rotating wheel assembly and a wheelchair. Background Technology

[0002] Currently, in wheelchairs using related technologies, the wheelchair frame is connected to the central part of the rotating wheel via a wheel fork. Specifically, the two connecting arms of the wheel fork are respectively located on both sides of the rotating wheel, and the connecting arms on both sides are rotatably connected to the bearing in the central part of the rotating wheel via a pivot. The wheel fork can transmit the force acting on the wheelchair frame to the rotating wheel, driving it to rotate. During rotation, the entire rotating wheel rotates around the pivot in the center of the rim, while the wheel fork remains stationary.

[0003] However, there is often a gap between the connecting arm of the wheel fork and the axial side of the rotating wheel to prevent the wheel fork from interfering with the rotation of the rotating wheel. When the rotating wheel is small, such as common auxiliary wheels and anti-roll wheels, its wheel size is only four inches. When the rotating wheel is rotating, foreign objects such as hair and fibers on the ground can easily get tangled on the shaft at the gap between the wheel fork and the rotating wheel, causing problems such as mechanical jamming and frequent maintenance. Summary of the Invention

[0004] The purpose of this utility model is to disclose a rotating wheel assembly and a wheelchair. By staggering the connecting part and the hollow part, after the wheel frame is connected to the external power arm, only the rotating wheel rotates relative to the wheel frame, while the wheel frame and the external power arm do not rotate, thus avoiding foreign objects from getting entangled in the connecting part.

[0005] To achieve the above objectives, this utility model discloses a rotating wheel assembly, which includes a wheel frame and a rotating wheel. The wheel frame is arranged in a ring and forms a hollow portion. The wheel frame is provided with a connecting portion, which is offset from the hollow portion. The rotating wheel is rotatably connected to the outer periphery of the wheel frame. The connecting portion is used to connect with an external power arm.

[0006] As an optional implementation, the rotating wheel assembly includes a bearing member disposed between the outer periphery of the wheel frame and the inner periphery of the rotating wheel.

[0007] As an optional implementation, the wheel frame includes an annular segment, the inner circumferential surface of the annular segment forming the hollow portion, and an annular groove provided on the outer circumferential surface of the annular segment, the bearing component being mounted in the annular groove; the rotating wheel includes a hub, the hub being disposed around the outer circumference of the wheel frame, the inner circumference of the hub being provided with a mounting ring, and the mounting ring being disposed around the outer circumference of the bearing component.

[0008] As an optional implementation, the mounting ring has a limiting ring on its axial side, the limiting ring abutting against one side of the bearing component; the rotating wheel assembly includes a pressure cap, the pressure cap abutting against the other side of the bearing component; the pressure cap is detachably connected to the mounting ring.

[0009] As an optional implementation, the annular segment has annular bosses on both axial sides, and the hollow portion passes through the middle of the annular bosses; the inner diameter of the annular bosses gradually increases from one end near the annular segment to the end far from the annular segment; the connecting portion is disposed on the inner peripheral wall of the annular bosses.

[0010] The outer peripheral wall of the annular boss has a snap-fit ​​edge on the side facing the annular groove; the two axial sides of the hub are respectively provided with snap-fit ​​grooves, and the snap-fit ​​edge snaps into the snap-fit ​​groove.

[0011] As an optional implementation, the wheel frame includes a first support frame and a second support frame. The first support frame is provided with a first annular segment, and an annular boss is provided on one side of the first annular segment. A first connecting portion is provided on the inner circumference of the first annular segment.

[0012] The second support frame is provided with a second annular segment, and the annular boss is provided on one side of the second annular segment. A second connecting part is provided on the outer periphery of the second annular segment. The first annular segment surrounds the outer periphery of the second annular segment, and the second connecting part is connected to the first connecting part.

[0013] The inner periphery of the second annular segment forms the hollow portion, and the annular groove is disposed on the outer periphery of the first annular segment and located between the two annular protrusions.

[0014] As an optional implementation, the rotating wheel further includes a buffer ring, and the outer peripheral surface of the hub is provided with a mounting groove. The buffer ring is installed in the mounting groove and surrounds the outer periphery of the hub.

[0015] As an optional implementation, the wheel frame has connecting surfaces on both axial sides, and the connecting part is disposed on one of the connecting surfaces or on both of the connecting surfaces.

[0016] As an optional implementation, the bearing component includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. The inner ring is fixedly connected to the outer periphery of the wheel frame, the outer ring is fixedly connected to the inner periphery of the rotating wheel, the plurality of rolling elements are mounted in a raceway between the inner ring and the outer ring, and the cage is used to separate the plurality of rolling elements.

[0017] A wheelchair, characterized in that it includes a rotating wheel assembly as described above.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The rotating wheel assembly of this utility model sets the connecting part and the hollow part separately, so that after the wheel frame is connected to the external power arm, only the rotating wheel rotates relative to the wheel frame. The overall force point of the rotating wheel assembly is on the outer circumference of the wheel frame; while the wheel frame and the external power arm do not rotate. This fundamentally avoids foreign objects from getting entangled in the connecting part, reduces the frequency of mechanical failures, and lowers maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the structure of the rotating wheel assembly and the external power arm in Embodiment 1 of this utility model;

[0022] Figure 2 is an exploded view of the rotating wheel assembly and the external power arm in Embodiment 1 of this utility model;

[0023] Figure 3 is a schematic diagram of the wheel frame in Embodiment 1 of this utility model;

[0024] Figure 4 is a structural schematic diagram of the wheel hub in Embodiment 1 of this utility model;

[0025] Figure 5 is a cross-sectional structural diagram of the rotating wheel assembly (with the buffer ring hidden) in Embodiment 1 of this utility model;

[0026] Figure 6 is a schematic cross-sectional view of the rotating wheel assembly in the axial direction in Embodiment 1 of this utility model;

[0027] Figure 7 is a cross-sectional structural diagram of the rotating wheel assembly (with the first support frame hidden) in Embodiment 1 of this utility model.

[0028] Explanation of key figure labels:

[0029] 10. Rotating wheel assembly; 11. Wheel frame; 110. Hollow part; 111. Connecting part; 112. First connecting hole; 113. Positioning hole; 114. Annular groove; 115. Annular boss; 116. Snap-fit ​​edge; 12. Rotating wheel; 13. Bearing component; 14. Wheel hub; 141. Mounting ring; 142. Limiting ring; 143. Snap-fit ​​groove; 144. Mounting groove; 15. Pressure cap; 151. Connecting piece; 16. Buffer ring; 17. First support frame; 171. First annular segment; 172. First connecting part; 18. Second support frame; 181. Second annular segment; 182. Second connecting part; 20. Power arm; 21. Fastener; 22. Mounting part; 23. Positioning post; 24. Second connecting hole. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0035] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0036] Referring to Figure 1, this embodiment of the application provides a rotating wheel assembly 10, which includes a wheel frame 11 and a rotating wheel 12. Specifically, referring to Figure 3, the wheel frame 11 is arranged in a ring shape, forming a hollow portion 110. The wheel frame 11 is provided with a connecting portion 111, which is offset from the hollow portion 110. The rotating wheel 12 is rotatably connected to the outer periphery of the wheel frame 11. In addition, the connecting portion 111 is used to connect to an external power arm 20.

[0037] Based on this structure, when using the rotating wheel assembly 10 of this utility model, during assembly, the rotating wheel 12 can first be set on the outer periphery of the wheel frame 11 and rotatably mounted with the wheel frame 11. Then, the wheel frame 11 is fixedly connected to the external power arm 20 through the connecting part 111 on the wheel frame 11. The external power arm 20 can be, for example, the wheel fork of a mobility device such as a wheelchair frame or a trolley support.

[0038] In use, an external force can be applied to push the wheelchair frame, trolley support, etc. At this time, the external power arm 20 will transmit the thrust to the rotating wheel assembly 10, applying a horizontal forward force to the rotating wheel assembly 10. At the same time, the part of the rotating wheel 12 in contact with the ground has a tendency to slide backward, so the ground will apply a forward static friction force to the rotating wheel 12, driving the rotating wheel 12 to rotate relative to the wheel frame 11 and moving the rotating wheel assembly 10 forward.

[0039] Because the connecting part 111 and the hollow part 110 are staggered, after the wheel frame 11 is connected to the external power arm 20 through the connecting part 111, neither the wheel frame 11 nor the external power arm 20 rotates. Since the wheel frame 11 and the external power arm 20 only transmit force and do not rotate themselves, the connecting part 111 can be assembled with the external power arm 20 without gaps. That is, the two can be fitted together or inserted into each other without any motion interference. At the same time, since neither the wheel frame 11 nor the external power arm 20 rotates, it can prevent foreign objects such as hair and fibers on the ground from getting tangled on the connecting part 111.

[0040] Furthermore, the connecting part 111 is offset from the hollow part 110 of the wheel frame 11, and the position of the connecting part 111 avoids the central area of ​​the wheel, ensuring that after the connecting part 111 is connected to the external power arm 20, the rotating wheel 12 can freely rotate around the outer circumference of the wheel frame 11. The rotating wheel 12 is directly and rotatably connected to the outer circumference of the wheel frame 11, and the overall force point of the rotating wheel assembly 10 is on the outer circumferential surface of the wheel frame 11; rather than the traditional arrangement where it is connected through a central shaft and the force during rotation is borne by a central bearing, this application enhances the stability of the rotating wheel assembly 10 during rotation. Since there is no central shaft gap, foreign objects are prevented from getting entangled in the central shaft.

[0041] Therefore, by setting the connecting part 111 and the hollow part 110 separately, after the wheel frame 11 is connected to the external power arm 20, only the rotating wheel 12 rotates relative to the wheel frame 11, while the wheel frame 11 and the external power arm 20 do not rotate. This fundamentally avoids foreign objects from getting entangled in the connecting part 111, reduces the frequency of mechanical failures, and lowers maintenance costs.

[0042] The connecting part 111 can also be located above the hollow part 110, so that the connecting part 111 is further away from the ground. When the rotating wheel 12 rotates, since the height of the connecting part 111 remains unchanged, foreign objects such as hair and fibers on the ground can be prevented from getting tangled on the connecting part 111.

[0043] Referring to Figure 3, the connecting part 111 includes a connecting block, which can be integrally formed on the wheel frame 11. The connecting block has a connecting surface, and the connecting surface has a first connecting hole 112 and a positioning hole 113. Referring to Figure 2, correspondingly, a second connecting hole 24 and a positioning post 23 can be provided on the external power arm 20. When the external power arm 20 approaches the connecting surface, the positioning post 23 can be inserted into the positioning hole 113. The connecting surface on the power arm 20 can be aligned with the connecting surface on the connecting block under the guidance of the positioning post 23. Then, the fastener 21 can be passed through the second connecting hole 24 and the first connecting hole 112 in sequence to achieve a fastened connection between the power arm 20 and the connecting part 111.

[0044] In addition, the connecting part 111 can also be a slot / pin or other structure integrally formed on the wheel frame 11. A corresponding pin / slot structure is provided on the power arm 20. When the power arm 20 is inserted into the slot / pin on the wheel frame 11 through the pin / slot, the wheel frame 11 and the power arm 20 are mutually limited in the circumferential direction of the wheel frame 11 and can be transmitted.

[0045] As an alternative implementation, referring to Figures 5 and 6, the rotating wheel assembly 10 includes a bearing member 13, and the bearing member 13 is disposed between the outer periphery of the wheel frame 11 and the inner periphery of the rotating wheel 12.

[0046] Based on this structure, during assembly, the bearing component 13 can be embedded in the annular gap between the outer circumference of the wheel frame 11 and the inner circumference of the rotating wheel 12. The inner ring of the bearing is fixedly connected to the outer circumference of the wheel frame 11 by means such as interference fit or bolt fixation, and the outer ring of the bearing is fixedly connected to the inner circumference of the rotating wheel 12. Then, the rotating wheel assembly 10 is fixed to the external power arm 20 through the connecting part 111 of the wheel frame 11.

[0047] In use, the rotating wheel 12 drives the outer ring of the bearing component 13 to rotate under the action of ground friction. The rotating wheel 12 rolls around the axis of the bearing component 13, while the wheel frame 11 remains stationary and only serves as a support structure.

[0048] Thus, the rotating wheel 12 is rotatably connected to the wheel frame 11 through the bearing component 13, and the bearing component 13 causes the rotational friction of the rotating wheel 12 to be concentrated inside the bearing, rather than on the direct contact surface between the wheel frame 11 and the rotating wheel 12, making the wheelchair easier to push.

[0049] As an optional implementation, referring to Figure 3, the wheel frame 11 includes an annular segment, the inner circumferential surface of which forms the hollow portion 110. Simultaneously, an annular groove 114 is provided on the outer circumferential surface of the annular segment, and the bearing component 13 is mounted in the annular groove 114. Referring to Figures 4 and 5, the rotating wheel 12 includes a hub 14, which is arranged around the outer circumference of the wheel frame 11. The inner circumference of the hub 14 is provided with a mounting ring 141, which is arranged around the outer circumference of the bearing component 13.

[0050] Based on this structure, during assembly, the bearing component 13 can be pressed into the annular groove 114 first, so that the inner ring of the bearing fits tightly with the bottom surface of the groove; then, the hub 14 of the rotating wheel 12 is fitted onto the outer ring of the bearing component 13 through the mounting ring 141, so that the inner wall of the mounting ring 141 forms a sliding or rolling fit with the outer ring of the bearing. In use, the rotating wheel 12 drives the outer ring of the bearing component 13 to rotate under the action of ground friction, while the annular section of the wheel frame 11 remains stationary.

[0051] The annular groove 114 provides installation space for the bearing component 13 and also acts as a radial limit for the bearing component 13, preventing radial movement of the bearing component 13 during rotation and ensuring the stability of the rotation of the rotating wheel 12.

[0052] As an optional implementation, referring to Figures 4 and 5, a limiting ring 142 is provided on the axial side of the mounting ring 141, and the limiting ring 142 abuts against one side of the bearing member 13. Referring to Figures 2 and 6, the rotating wheel assembly 10 includes a pressure cap 15, and the pressure cap 15 abuts against the other side of the bearing member 13. The pressure cap 15 is detachably connected to the mounting ring 141.

[0053] Based on this structure, the bearing component 13 can first be installed in the annular groove 114 on the outer periphery of the annular segment of the wheel frame 11, with the inner ring of the bearing fixedly fitted against the groove wall of the annular groove 114. Then, the mounting ring 141 of the wheel hub 14 is moved axially towards the bearing component 13, and after the mounting ring 141 is sleeved on the outer periphery of the bearing component 13, the limiting ring 142 abuts against one axial side of the bearing component 13. At this time, the pressure cap 15 is then installed on the side of the mounting ring 141 away from the limiting ring 142, and the pressure cap 15 abuts against the other side of the bearing component 13.

[0054] Both the mounting ring 141 and the pressure cap 15 are provided with connection holes, and the two are fixedly connected by screws, bolts and other connecting parts 151.

[0055] Thus, the limiting ring 142 and the pressure cap 15 form an axial clamping structure for the bearing, locking the bearing axially between the wheel frame 11 and the rotating wheel 12, preventing the bearing from moving axially during rotation, and ensuring that the rotating wheel 12 rotates stably around the outer circumference of the wheel frame 11. This also facilitates the installation and removal of the bearing component 13, improving the ease of maintenance of the rotating wheel assembly 10.

[0056] As an optional implementation, referring again to FIG3, annular bosses 115 are provided on both sides of the annular segment along its axial direction, and a hollow portion 110 penetrates the middle of the annular bosses 115. The inner diameter of the annular bosses 115 gradually increases from the end near the annular segment to the end away from the annular segment, and a connecting portion 111 is provided on the inner peripheral wall of the annular bosses 115.

[0057] In addition, the end of the outer peripheral wall of the annular boss 115 is provided with a snap-fit ​​edge 116 on the side facing the annular groove 114; referring to Figure 4, the two axial sides of the hub 14 are respectively provided with snap-fit ​​grooves 143, and the snap-fit ​​edge 116 is snapped into the snap-fit ​​grooves 143.

[0058] Based on this structure, during assembly, the bearing component 13 can be first installed in the annular groove 114 on the outer circumferential surface of the annular segment. Then, the hub 14 is brought axially closer to the wheel frame 11, and the mounting ring 141 on the inner circumference of the hub 14 is fitted onto the outer circumference of the bearing component 13. At the same time, the snap-fit ​​grooves 143 on both sides of the hub 14 are snapped into the snap-fit ​​edges 116 at both ends of the annular boss 115. Finally, the assembled rotating wheel assembly 10 is connected to the external power arm 20 through the connecting part 111 on the inner circumferential wall of the annular boss 115.

[0059] In use, as the external power arm 20 transmits force to the rotating wheel assembly 10, the wheel frame 11 remains stationary with respect to the external power arm 20, while the wheel hub 14 rotates relative to the wheel frame 11 via the bearing component 13, and at the same time, the locking groove 143 rotates relative to the locking edge 116.

[0060] It should be noted that the inner peripheral wall of the annular boss 115 is the side peripheral wall of the annular boss 115 facing the hollow portion 110, and the outer peripheral wall of the annular boss 115 is the side peripheral wall of the annular boss 115 facing away from the hollow portion 110. Since the snap-fit ​​edge 116 is provided at the end of the outer peripheral wall and extends toward the annular groove 114, when the hub 14 is annular around the outer periphery of the wheel frame 11, the snap-fit ​​groove 143 on the hub 14 can snap into the snap-fit ​​edge 116 of the annular boss 115.

[0061] The boss is flared, wider at both ends and narrower in the middle, which increases the contact area between the wheel frame 11 and the wheel hub 14. The wheel frame 11 can evenly distribute external loads (such as thrust and gravity) to the annular section through the inclined surface of the boss, avoiding stress concentration in the bearing area. After the snap-fit ​​edge 116 is embedded in the snap-fit ​​groove 143, it forms an axial stop wall, preventing the wheel hub 14 from axially separating from the wheel frame 11 due to severe vibration or impact (such as driving over potholes).

[0062] As an optional implementation, referring to FIG2, the wheel frame 11 includes a first support frame 17 and a second support frame 18. Specifically, the first support frame 17 is provided with a first annular segment 171, one side of the first annular segment 171 is provided with an annular boss 115, and the inner circumference of the first annular segment 171 is provided with a first connecting portion 172.

[0063] Correspondingly, the second support frame 18 is provided with a second annular segment 181, and an annular boss 115 is provided on one side of the second annular segment 181, and a second connecting part 182 is provided on the outer periphery of the second annular segment 181. The first annular segment 171 surrounds the outer periphery of the second annular segment 181, and the second connecting part 182 is connected to the first connecting part 172.

[0064] It should be noted that the inner periphery of the second annular segment 181 is formed into a hollow portion 110, and the annular groove 114 is disposed on the outer periphery of the first annular segment 171 and is located between the two annular protrusions 115.

[0065] Based on this structure, during assembly, the first support frame 17 and the second support frame 18 can be separated first. Then, the bearing component 13 can be installed from the side of the first annular segment 171 away from the annular boss 115 onto the annular groove 114 on the outer periphery of the first annular segment 171. Then, the hub 14 can be installed from the side of the first annular segment 171 away from the annular boss 115 onto the outer periphery of the bearing component 13 via the inner mounting ring 141. Then, the second support frame 18 can be brought close to the first support frame 17, so that the second connecting part 182 on the outer periphery of the second annular segment 181 is connected to the first connecting part 172 on the inner periphery of the first annular segment 171, so that the first annular segment 171 surrounds and is installed on the outer periphery of the second annular segment 181.

[0066] During the installation of the first annular segment 171 and the second annular segment 181, the annular bosses 115 on the two support frames approach each other, and the snap-fit ​​edges 116 on them snap into the snap-fit ​​grooves 143 of the hub 14 along the axial direction.

[0067] Therefore, by disassembling the wheel frame 11 into a first support frame 17 and a second support frame 18, interference of the inner second support frame 18 with the installation of the outer bearing component 13 and the wheel hub 14 can be avoided, simplifying the assembly sequence and process. The first connecting part 172 has an internal thread, and the second connecting part 182 has an external thread. The second annular segment 181 is fixed to the first connecting part 172 on the inner circumference of the first annular segment 171 via the outer second connecting part 182, achieving coaxial positioning of the inner and outer layers. The annular boss 115 structure of the first support frame 17 and the second support frame 18 allows for bidirectional axial positioning of the bearing component 13 and the wheel hub 14, preventing axial movement of the bearing component 13 and the wheel hub 14.

[0068] As an optional implementation, the rotating wheel 12 also includes a buffer ring 16. Referring to Figures 5 and 6, the outer peripheral surface of the hub 14 is provided with a mounting groove 144, wherein the buffer ring 16 is installed in the mounting groove 144 and surrounds the outer periphery of the hub 14.

[0069] Based on this structure, after the hub 14 is installed on the wheel frame 11, the external power arm 20 applies a horizontal thrust to the rotating wheel assembly 10 through the wheel frame 11. At this time, the buffer ring 16 tends to slide relative to the ground, so that the ground provides a forward static friction force to the buffer ring 16. Subsequently, the buffer ring 16 drives the hub 14 to start rotating relative to the wheel frame 11.

[0070] Specifically, the buffer ring 16 can be made of elastic materials such as rubber or silicone, and it is tightly connected to the mounting groove 144 on the outer periphery of the wheel hub 14. When the elastic material comes into contact with the ground, it deforms, which increases the actual contact area and thus increases the static friction. At the same time, the buffer ring 16 can reduce the slippage of the rotating wheel 12 and play a role in cushioning and shock absorption.

[0071] In addition, when the buffer ring 16 is worn and damaged, it can be removed from the mounting slot 144 on the hub 14 for replacement.

[0072] As an optional implementation, the wheel frame 11 has connecting surfaces on both axial sides, wherein the connecting part 111 is provided on one side connecting surface or both sides connecting surface.

[0073] When the connecting part 111 is provided on one side of the connecting surface, the connecting part 111 can be connected to an external power arm 20 (such as a single-sided bracket). The external power arm 20 applies force to one side of the wheel frame 11 through the connecting part 111 to drive the rotating member to rotate relative to the wheel frame 11.

[0074] Therefore, since only one external power arm 20 is needed to fix the wheel frame 11 through the single-sided connecting part 111, the number of parts and assembly steps can be reduced.

[0075] When the connecting part 111 is provided on both sides of the connecting surface, the connecting part 111 can be connected to two external power arms 20. The two external power arms 20 can be two drive arms on the U-shaped wheel fork. The external power arms 20 apply force to both sides of the wheel frame 11 through the connecting part 111 to drive the rotating part to rotate relative to the wheel frame 11.

[0076] Therefore, the two drive arms of the U-shaped wheel fork are fixed to the connecting parts 111 on both sides of the wheel frame 11, forming a symmetrical force structure, ensuring that the thrust or pull force is evenly transmitted to both sides of the wheel frame 11, and avoiding the wheel frame 11 from tilting or the connecting parts 111 from loosening due to unilateral force.

[0077] As an optional implementation, the bearing component 13 includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. Specifically, the inner ring is fixedly connected to the outer periphery of the wheel frame 11, the outer ring is fixedly connected to the inner periphery of the rotating wheel 12, the plurality of rolling elements are installed in the raceway between the inner ring and the outer ring, and the cage is used to separate the plurality of rolling elements.

[0078] Based on this structure, during assembly, the inner ring of the bearing component 13 is first fixed to the outer circumference of the wheel frame 11. An interference fit or key connection can be used to ensure that there is no relative rotation between the inner ring and the wheel frame 11, achieving a reliable connection. Next, the inner circumference of the rotating wheel 12 is fixedly connected to the outer ring of the bearing component 13. Similarly, a suitable connection method can be used, such as an interference fit or bolt connection, to ensure that the outer ring moves synchronously with the rotating wheel 12.

[0079] During installation, several rolling elements are installed in the raceway between the inner and outer rings. A cage is used to separate these rolling elements, preventing them from colliding and rubbing against each other, ensuring smooth rolling within the raceway. Finally, the assembled rotating wheel assembly 10 with bearing 13 is connected to the external power arm 20 via the connecting part 111 on the wheel frame 11, completing the assembly of the entire device.

[0080] In use, when the external power arm 20 applies a horizontal thrust to the rotating wheel assembly 10 via the wheel frame 11, the wheel frame 11 does not rotate because the inner ring is fixed to it; however, the outer ring is fixed to the rotating wheel 12, causing the rotating wheel 12 to tend to rotate. The ground exerts a forward static friction force on the rotating wheel 12, which is transmitted to the rolling elements through the outer ring. The rolling elements roll within the raceway between the inner and outer rings, transmitting the rotation of the outer ring to the inner ring, thereby enabling the rotating wheel 12 to rotate relative to the wheel frame 11.

[0081] The rolling elements are balls. These rolling elements roll between the inner and outer rings, and compared to sliding friction, rolling friction offers less resistance. This makes the rotating wheel 12 rotate more smoothly relative to the wheel frame 11, effectively reducing energy loss and improving equipment operating efficiency.

[0082] Example 2

[0083] Unlike Embodiment 1, this embodiment discloses a wheelchair that includes the rotating wheel assembly 10 of Embodiment 1.

[0084] Specifically, the wheelchair has a frame, and a power arm 20 is provided at the bottom of the frame. The power arm 20 is connected to the connecting part 111 on the wheel frame 11 of the rotating wheel assembly 10.

[0085] Referring to Figure 1, one end of the power arm 20 is provided with a mounting portion 22, which includes a mounting post with a threaded hole. This threaded hole can be connected to a corresponding threaded hole on the frame using screws. The other end of the power arm 20 is provided with a second connecting hole 24 and a positioning post 23. The positioning post 23 can be inserted into the positioning hole 113 of the connecting portion 111 of the wheel frame 11. The second connecting hole 24 can be connected to the first connecting hole 112 on the connecting portion 111 using a fastener 21 to achieve a secure connection between the power arm 20 and the connecting portion 111.

[0086] The specific principles and processes by which the power arm 20 drives the rotating wheel assembly 10 to rotate, as well as the specific structure of the rotating wheel assembly 10, are described in detail in Embodiment 1, and will not be elaborated further here.

[0087] The foregoing has provided a detailed description of a rotating wheel assembly and a wheelchair disclosed in the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the rotating wheel assembly and wheelchair of this utility model and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A rotating wheel assembly, characterized in that, The rotating wheel assembly includes a wheel frame and a rotating wheel. The wheel frame is arranged in a ring and forms a hollow part. The wheel frame is provided with a connecting part, which is offset from the hollow part. The rotating wheel is rotatably connected to the outer periphery of the wheel frame. The connecting part is used to connect to an external power arm.

2. The rotating wheel assembly according to claim 1, characterized in that, The rotating wheel assembly includes a bearing component disposed between the outer periphery of the wheel frame and the inner periphery of the rotating wheel.

3. The rotating wheel assembly according to claim 2, characterized in that, The wheel frame includes an annular segment, the inner circumferential surface of which forms the hollow portion, and an annular groove is provided on the outer circumferential surface of the annular segment, and the bearing component is installed in the annular groove; the rotating wheel includes a hub, which is arranged around the outer circumference of the wheel frame, and an mounting ring is provided on the inner circumference of the hub, which is arranged around the outer circumference of the bearing component.

4. The rotating wheel assembly according to claim 3, characterized in that, The mounting ring has a limiting ring on its axial side, which abuts against one side of the bearing component; the rotating wheel assembly includes a pressure cover, which abuts against the other side of the bearing component; the pressure cover is detachably connected to the mounting ring.

5. The rotating wheel assembly according to claim 3, characterized in that, The annular segment has annular bosses on both axial sides, and the hollow portion passes through the middle of the annular bosses; the inner diameter of the annular bosses gradually increases from the end near the annular segment to the end away from the annular segment; the connecting portion is provided on the inner peripheral wall of the annular bosses; the end of the outer peripheral wall of the annular bosses facing the annular groove has a snap-fit ​​edge; the hub has snap-fit ​​grooves on both axial sides, and the snap-fit ​​edge snaps into the snap-fit ​​groove.

6. The rotating wheel assembly according to claim 5, characterized in that, The wheel frame includes a first support frame and a second support frame. The first support frame has a first annular segment, and one side of the first annular segment has the annular boss. The inner circumference of the first annular segment has a first connecting portion. The second support frame has a second annular segment, and one side of the second annular segment has the annular boss. The outer circumference of the second annular segment has a second connecting portion. The first annular segment surrounds the outer circumference of the second annular segment, and the second connecting portion is connected to the first connecting portion. The inner circumference of the second annular segment forms the hollow portion, and the annular groove is disposed on the outer circumference of the first annular segment and is located between the two annular bosses.

7. The rotating wheel assembly according to claim 3, characterized in that, The rotating wheel also includes a buffer ring. The outer circumferential surface of the hub is provided with a mounting groove. The buffer ring is installed in the mounting groove and surrounds the outer circumference of the hub.

8. The rotating wheel assembly according to claim 1, characterized in that, The wheel frame has connecting surfaces on both axial sides, and the connecting part is disposed on one of the connecting surfaces or on both of the connecting surfaces.

9. The rotating wheel assembly according to any one of claims 2-8, characterized in that, The bearing component includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. The inner ring is fixedly connected to the outer periphery of the wheel frame, and the outer ring is fixedly connected to the inner periphery of the rotating wheel. The plurality of rolling elements are installed in a raceway between the inner ring and the outer ring, and the cage is used to separate the plurality of rolling elements.

10. A wheelchair, characterized in that, Includes the rotating wheel assembly as described in any one of claims 1-9.

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