A sliding tray structure and a walking aid cart

Abstract

This utility model discloses a sliding tray structure and a walking trolley, relating to the field of trolley technology. It includes: two mounting plates arranged opposite each other, with a hanging rod connecting the two mounting plates; two hanging rods, each with two ends of a cloth bag fitted onto it, the bag having an upward-opening storage space; a guide assembly including a guide member and a slider, the slider slidingly engaging with the guide member, the guide member being connected to the mounting plate; and a tray connected to the slider, the tray having at least a first position and a second position as it moves with the slider. In the first position, the tray is above the opening of the storage space; in the second position, the tray at least partially extends above the storage space. The slider moves on the guide member, and the tray moves with the slider. In the first position, the tray covers the opening of the cloth bag's storage space; in the second position, the tray no longer obstructs the opening of the storage space, allowing the user to access items.

Description

Technical Field

[0001] This utility model relates to the field of stroller technology, and in particular to a sliding tray structure and a walking stroller. Background Technology

[0002] Walking trolleys are devices designed for people with mobility impairments. Existing walking trolleys typically include a tray and storage components, but the space fit between the tray and storage is often poor, making them inconvenient to use. The tray usually has a fixed installation or a easily detachable structure. While a fixed tray can stably hold food and meet usage needs, the accompanying cloth bag for storing items is usually located below or beside the tray. When items are on the tray, retrieving items from the bag can easily knock over items on the tray, potentially causing liquid spills and slipping hazards. Detachable trays, while solving space issues, are extremely difficult for users with limited mobility, and the tray is prone to falling and damage during disassembly and assembly. Utility Model Content

[0003] To improve the ease of storage of the walking cart, this application provides a sliding tray structure and a walking cart.

[0004] The sliding plate structure provided in this application adopts the following technical solution: A sliding plate structure includes: two mounting plates arranged opposite each other, with a hanging rod connected between the two mounting plates; two hanging rods, each with two ends of a cloth bag fitted onto the hanging rod, the cloth bag having an upward-opening storage space inside; a guide assembly including a guide member and a slider, the slider slidingly engaging with the guide member, the guide member being connected to the mounting plate; and a plate, the bottom of which is connected to the slider, the plate having at least a first position and a second position when moving with the slider. When the plate is in the first position, it is located above the opening of the storage space; when the plate is in the second position, it at least partially extends above the storage space.

[0005] By adopting the above technical solution, the slider moves on the guide, and the plate moves with the slider, so that the plate can switch between the use state and the storage state. When the plate is in the first position, the plate covers the opening of the storage space of the cloth bag. When the plate is in the second position, the plate no longer blocks the opening of the storage space, and the user can store and retrieve items in the storage space.

[0006] Optionally, the guide member has a through guide groove, and the slider is connected to a guide post on the side near the guide member, with the guide post located within the guide groove.

[0007] By adopting the above technical solution, the sliding cooperation between the slider and the guide is transformed into the linear movement of the guide post in the guide groove. The guide post is bidirectionally limited by the groove wall, which greatly improves the stability of the plate during the sliding process and effectively avoids the plate from shifting laterally or moving up and down.

[0008] Optionally, the guide member has a groove, the slider is located in the groove and abuts against the guide member, the surface of the groove has a protruding edge extending along the length of the groove, and the side of the slider that abuts against the guide member has a groove that cooperates with the protruding edge.

[0009] By adopting the above technical solution, the circumferential wall of the slide groove forms a fully enveloping limit on the slider, preventing the slider from detaching from the guide when sliding. The convex edge extending along the length of the slide groove surface and the matching groove on the slider further form an interlocking structure, which not only enhances the tightness of the connection between the slider and the guide, but also effectively prevents the slider from moving laterally during the sliding process, ensuring that the plate always moves along the preset trajectory.

[0010] Optionally, the plate has limiting grooves on both sides near the mounting plate, the limiting grooves extend along the length of the slider, and the mounting plate is provided with limiting members, the limiting members being at least partially located in the limiting grooves and cooperating with the limiting grooves.

[0011] By adopting the above technical solution, the sliding stroke of the plate is effectively constrained. The limiting groove is set along the sliding direction of the slider to ensure that the limiting component can move synchronously in the limiting groove with the sliding of the plate. This does not affect the normal switching position of the plate, but also provides real-time limiting protection for the plate, preventing the plate from detaching from the guide component or exceeding the preset usage range due to excessive displacement.

[0012] Optionally, when the plate is in the first position and the second position, the limiting member is located at both ends of the limiting groove. One end of the limiting groove has a notch. When the plate is in the first position, the limiting member is located at the notch. The limiting member can move from the notch to outside the limiting groove.

[0013] By adopting the above technical solution, when the plate is in the first position, the limiting component can be moved out of the limiting groove through the notch, providing a convenient way to disassemble the plate. When it is necessary to clean or replace the plate, there is no need to disassemble the entire guide assembly. Simply move the plate to the first position, and the plate can be quickly removed through the notch. This simplifies the plate disassembly and assembly process, reduces the difficulty of maintenance and cleaning, and improves the user experience of the product.

[0014] This application also discloses a walking aid cart, including a front wheel frame and a rear wheel frame. A front roller is installed at the bottom of the front wheel frame, and a rear roller is installed at the bottom of the rear wheel frame. A handle is connected to the end of the front wheel frame away from the front roller. The cart also includes the aforementioned sliding tray structure. The front wheel frame and the rear wheel frame are rotatably connected. The end of the front wheel frame away from the front roller is connected to the rear end of the mounting plate, and the end of the rear wheel frame away from the rear roller is connected to the front end of the mounting plate.

[0015] By adopting the above technical solution, the structure in which the front wheel frame and the rear wheel frame are connected to the rear and front ends of the mounting plate respectively ensures that the sliding tray structure is stably combined with the main body of the trolley. The sliding of the tray will not affect the stability of the trolley. The walking trolley has the functions of assisting walking and conveniently placing food. It is suitable for people with mobility impairments to pick up food at any time while walking, which expands the usage scenarios of the walking trolley and improves its practicality and multi-functionality.

[0016] Optionally, the mounting plate has a sliding groove through it in the front-rear direction, and the front wheel frame has a sliding post at the end away from the front roller. The sliding post slides in conjunction with the sliding groove. When the sliding post is located near the front end of the mounting plate, the trolley is in a retracted state. When the sliding post is located near the rear end of the mounting plate, the trolley is in a working state.

[0017] By adopting the above technical solution, when the sliding post is located near the front end of the mounting plate in the sliding slot, the trolley can be folded and stored, significantly reducing its size and making it easy to store or carry. When the sliding post is located near the rear end of the mounting plate in the sliding slot, the trolley is unfolded into its working state, ensuring structural stability when the trolley moves and preventing folding or loosening. The mating structure between the sliding slot and the sliding post does not require complex locking parts; the state switching can be achieved simply by the position of the sliding post within the slot, making operation simple and convenient.

[0018] Optionally, the mounting plate is provided with a positioning component, which includes a torsion spring, a buckle and a transmission rod. The two ends of the torsion spring are respectively connected to the mounting plate and the buckle. The buckle is rotatably connected to the mounting plate. The two ends of the transmission rod are respectively connected to the rear wheel frame and the buckle. When the trolley is in working state, the buckle fixes the sliding column.

[0019] By adopting the above technical solution, the torsion spring is connected to the mounting plate and the latching component at both ends, providing a continuous elastic restoring force to the latching component and ensuring that it always has a locking tendency. The design of the latching component being rotatably connected to the mounting plate allows the latching component to rotate flexibly to lock or unlock. The structure of the transmission rod connecting the rear wheel frame and the latching component at both ends converts the rotation of the rear wheel frame into the rotation power of the latching component. When the trolley is unfolded to the working state, the transmission rod drives the latching component to rotate and locks it through the torsion spring's reset, preventing the trolley from accidentally folding during use. When the trolley needs to be folded, rotating the rear wheel frame in the opposite direction will unlock the latching component through the transmission rod, making the operation smooth and seamless. This positioning component achieves automatic locking of the trolley in both folded and unfolded states, eliminating the need for manual locking and improving safety and ease of operation.

[0020] Optionally, a horizontally arranged anti-collision disc is fitted at the connection between the front wheel frame and the front roller, and the anti-collision disc is rotatably connected to the front wheel frame.

[0021] By adopting the above technical solution, the anti-collision wheel can rotate synchronously with the trolley's movement. When the trolley moves in a narrow space, if the front rollers collide with an obstacle, the anti-collision wheel will first contact the obstacle and convert the impact force into rolling friction through its own rotation. This significantly reduces the damage to the front wheel frame and the trolley body, and also guides the trolley's direction. Simultaneously, it prevents the trolley from tipping over due to collisions, improving walking safety. The anti-collision wheel also protects the front rollers from side impact damage, extending their service life.

[0022] Optionally, the anti-collision wheel includes a wheel body and an insert. The insert and the wheel body cooperate to form a ring structure. The wheel body has a slot that extends along the periphery of the wheel body to the axle. The insert and the slot are detachably connected.

[0023] By adopting the above technical solution, installation does not require disassembling the front rollers. The insert is simply inserted into the slot to form a ring structure with the wheel disc body and is then fitted onto the front wheel frame. When the anti-collision wheel disc becomes worn or damaged and needs replacement, the insert can be directly removed without disassembling the trolley's front roller assembly, allowing for quick replacement of the wheel disc body or insert. Furthermore, this detachable structure facilitates the replacement of wheel disc bodies or inserts of different materials and diameters according to actual needs, adapting to different usage scenarios.

[0024] In summary, this application includes at least one of the following beneficial effects: 1. The guide assembly enables the sliding position switching of the plate, allowing for flexible transitions between concealed and exposed storage spaces without disassembly. This avoids the problem of items being knocked over when retrieving items from a fixed plate, and solves the issues of cumbersome operation and easy loss or damage with detachable plates. The cooperation between the guide groove and guide post, the engagement of the sliding groove protrusion and the slider groove, and the constraint of the limit groove on the plate's stroke enhance the stability of the plate's sliding motion, adapting to the operating habits of users with limited mobility, and balancing practicality and safety.

[0025] 2. With the cooperation of the sliding slot of the mounting plate and the sliding column of the front wheel frame, the trolley can be folded and switched between working states simply by adjusting the position of the sliding column, without the need for complicated parts; the positioning component realizes automatic locking when the trolley is unfolded and synchronous unlocking when it is folded through the linkage of torsion spring, buckle and transmission rod, avoiding the risk of accidental folding, and the operation is smooth without the need for manual additional locking.

[0026] 3. The anti-collision wheel at the front wheel frame can buffer the impact of side collisions by rotating, reducing damage to the stroller and preventing tipping, protecting the front rollers and extending their service life; the anti-collision wheel adopts a detachable design for the wheel body and plug-in, which can be installed and replaced without disassembling the front rollers, making it easy to operate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the sliding plate structure when the plate is in the first position in this embodiment of the application.

[0028] Figure 2 This is an exploded view of a sliding plate structure in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the structure of the guide component in the embodiments of this application.

[0030] Figure 4 This is a schematic diagram of the structure of the plate in the embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the overall structure of the sliding plate structure when the plate is in the second position in this embodiment of the application.

[0032] Figure 6 This is a schematic diagram of the overall structure of a walking cart in working condition according to an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the overall structure of a walking aid cart in a folded state according to an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of the structure of a walking cart according to an embodiment of this application.

[0035] Figure 9 yes Figure 8A magnified view of a portion of point A in the middle.

[0036] Figure 10 This is an exploded view of the anti-collision wheel in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures: 1. Mounting plate; 101. Sliding groove; 11. Hanging rod; 12. Cloth bag; 1201. Storage space; 13. Limiting component; 14. Positioning assembly; 141. Torsion spring; 142. Buckle; 143. Transmission rod; 144. Connecting rod; 2. Guide assembly; 21. Guide component; 2101. Guide groove; 2102. Slide groove; 211. Raised edge; 22. Slider; 221. Guide post; 222. Post cap; 2201. Groove; 2202. Positioning hole; 3. Dinner plate; 301. Limiting groove; 3011. Notch; 31. Positioning pin; 4. Front wheel frame; 41. Front roller; 42. Handrail; 4201. Locking hole; 43. Sliding column; 44. Locking component; 5. Rear wheel frame; 51. Rear roller; 6. Anti-collision wheel; 61. Wheel body; 6101. Slot; 62. Insert; Detailed Implementation The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0038] This application discloses a sliding plate structure, referring to... Figure 1 and 2 The device includes two opposing vertically arranged mounting plates 1, with a hanging rod 11 connecting the two mounting plates 1. Two hanging rods 11 are provided at both ends of the mounting plates 1. The two ends of a cloth bag 12 are respectively fitted onto the two hanging rods 11. The cloth bag 12 hangs down in the middle, forming an upward-opening storage space 1201 inside. Specifically, one of the hanging rods 11 is U-shaped and bends downward in the middle, creating a channel that allows the user to easily take items out of the cloth bag 12. This side is the rear end of the sliding plate structure facing the user.

[0039] Reference Figure 2 and 3Both mounting plates 1 are equipped with guide components 2, each including a guide member 21 and a slider 22. The guide member 21 has a groove 2102 extending along the length of the mounting plate 1. The slider 22 is located within the groove 2102. The surface of the groove 2102 has a protruding edge 211 extending along its length. The slider 22 has a groove 2201 on the side near the guide member 21 that engages with the protruding edge 211. The protruding edge 211 is located within the groove 2201 and abuts against its inner wall. In this embodiment, two protruding edges 211 and two corresponding grooves 2201 are provided. The two grooves 2201 are located on the side of the bottom of the slider 22. The engagement of the protruding edges 211 and the grooves 2201 prevents the slider 22 from shifting relative to the guide member 21, allowing it to move only back and forth along its length.

[0040] Reference Figure 3 The guide member 21 has a guide groove 2101 extending through it. A guide post 221 is connected to the slider 22, and the guide post 221 passes through the guide groove 2101. A cylindrical cap 222 is connected to the end of the guide post 221 away from the slider 22. The diameter of the cap 222 is larger than the width of the guide groove 2101. The guide post 221 passes through the guide groove 2101 and is connected to the slider 22. The cap 222 cannot pass through the guide groove 2101, further restricting the position of the slider 22 relative to the guide member 21, preventing it from deviating from the extending direction of the guide groove 2101.

[0041] Reference Figure 2 , 4 The slider 22 has positioning holes 2202 recessed at both ends. The bottom of the plate 3 has a positioning pin 31 that mates with the positioning holes 2202. The positioning pin 31 is inserted into the positioning hole 2202. Simply place the positioning pin 31 of the plate 3 in the corresponding positioning hole 2202 to place the plate 3 on the slider 22, and the plate 3 can move with the slider 22. Specifically, the size of the plate 3 is the same as the size of the opening of the storage space 1201. When the plate 3 is in the first position, the plate 3 is above the opening of the storage space 1201 and covers the opening of the storage space 1201. When the plate 3 is in the second position, the plate 3 extends forward and above the storage space 1201.

[0042] In a preferred embodiment, refer to Figure 2 and 5 The plate 3 has limiting grooves 301 extending along the length of the slider 22 on both sides near the mounting plate 1. The mounting plate 1 has a limiting member 13, one end of which is connected to the mounting plate 1, and the other end has a hook. The hook is located within the limiting groove 301 and slides in cooperation with it. The limiting grooves 301 prevent the plate 3 from detaching from the slider 22 due to excessive displacement during sliding, thus preventing items on the plate 3 from falling and improving safety.

[0043] In a preferred embodiment, refer to Figure 2 and 5 The limiting groove 301 has a notch 3011 on the front side near the sliding plate structure. When the plate 3 is in the first position, the limiting member 13 is located at the notch 3011, and the limiting member 13 can disengage from the limiting groove 301 from the notch 3011. When the plate 3 slides to the first position, the limiting member 13 is no longer restricted by the limiting groove 301, and the plate 3 can be directly removed from the slider 22, thus making the plate 3 easy to disassemble and assemble, simplifying the disassembly and assembly process of the plate 3.

[0044] This application also discloses a walking aid stroller, as described in the embodiments below. Figure 6 and 7 The system includes the aforementioned sliding plate structure, and a front wheel frame 4 and a rear wheel frame 5 that are rotatably connected to each other. The front wheel frame 4 and the rear wheel frame 5 are respectively located on the outer sides of two mounting plates 1 and connected to the mounting plates 1. The bottom of the front wheel frame 4 has two front rollers 41, and the bottom of the rear wheel frame 5 has two rear rollers 51. Both the front rollers 41 and the rear rollers 51 are omnidirectional wheels. The end of the front wheel frame 4 away from the front rollers 41 is connected to the rear end of the mounting plate 1, and the end of the rear wheel frame 5 away from the rear rollers 51 is connected to the front end of the mounting plate 1. A handle 42 is provided at the end of the front wheel frame 4 away from the front rollers 41.

[0045] Reference Figure 6-9 The mounting plate 1 has a sliding slot 101 extending through it in the front-to-back direction. The sliding slot 101 extends in the front-to-back direction. The front wheel frame 4 has a sliding post 43 at the end away from the front roller 41. The sliding post 43 extends into the sliding slot 101 and slides in cooperation with the sliding slot 101. When the sliding post 43 is located on the rear end side of the sliding slot 101, the angle between the front wheel frame 4 and the rear wheel frame 5 is at its maximum, and the trolley is in the working state. When the sliding post 43 is located on the front end side of the sliding slot 101, the angle between the front wheel frame 4 and the rear wheel frame 5 is at its minimum, and the trolley is in the folded state.

[0046] In a preferred embodiment, refer to Figure 8 and 9The mounting plate 1 is equipped with a positioning assembly 14, which includes a torsion spring 141, a latching member 142, and a transmission rod 143. The latching member 142 is rotatably connected to the mounting plate 1. Both ends of the torsion spring 141 are connected to the latching member 142 and the mounting plate 1, respectively. One end of the transmission rod 143 is connected to the latching member 142. A connecting rod 144 connects the transmission rods 143 on the two mounting plates 1. The mounting plate 1 has an oblong hole, and both ends of the connecting rod 144 pass through the oblong hole. When the trolley is in working condition, the latching member 142 fixes the sliding column 43 to the side near the rear end of the sliding groove hole 101. When the trolley needs to be folded, you can hold the connecting rod 144 and pull it. The connecting rod 144 moves in the oblong hole. The connecting rod 144 drives the transmission rod 143 to pull the buckle 142, so that the buckle 142 releases the sliding column 43. The sliding column 43 can slide in the sliding groove 101. After the sliding column 43 moves to the other end of the sliding groove 101, the trolley is folded.

[0047] In a preferred embodiment, refer to Figure 10 A horizontally positioned anti-collision wheel disc 6 is fitted at the connection between the front wheel frame 4 and the front roller 41, and the anti-collision wheel disc 6 is rotatably connected to the front wheel frame 4. The anti-collision wheel disc 6 includes a wheel disc body 61 and an insert 62. The insert 62 and the wheel disc body 61 cooperate to form a ring structure and are fitted together. The wheel disc body 61 extends from the periphery to the axle and has a slot 6101. The insert 62 is detachably connected to the slot 6101. The anti-collision wheel disc 6 can rotate when it encounters an obstacle, guiding the trolley to turn, thereby reducing the impact force on the user and ensuring the user's safety. When installing the anti-collision wheel disc 6, it is not necessary to remove the front wheel. Simply remove the insert 62 from the wheel disc body 61, fit the wheel disc body 61 onto the front wheel frame 4, and insert the insert 62 into the slot 6101. The wheel disc body 61 is easy to disassemble, and anti-collision wheel discs 6 of different materials and diameters can be replaced according to actual needs.

[0048] In a preferred embodiment, refer to Figure 6 A locking element 44 is provided at the connection between the handrail 42 and the front wheel frame 4. Locking holes 4201 are provided at equal intervals on the handrail 42. The locking element 44 can insert a pin into the locking hole 4201 to adjust the length of the handrail 42 extending on the front wheel frame 4, thereby adapting to the height and usage needs of different users.

[0049] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sliding plate structure, characterized in that, include: Mounting plate (1), two mounting plates (1) are arranged opposite each other, and a hanging rod (11) is connected between the two mounting plates (1). There are two hanging rods (11), and the two ends of a cloth bag (12) are sleeved on the two hanging rods (11). The cloth bag (12) has an upward-opening storage space (1201). The guide assembly (2) includes a guide member (21) and a slider (22), the slider (22) being slidably engaged with the guide member (21), and the guide member (21) being connected to the mounting plate (1); The plate (3) is connected to the slider (22) at its bottom. When the plate (3) moves with the slider (22), it has at least a first position and a second position. When the plate (3) is in the first position, it is located above the opening of the storage space (1201). When the plate (3) is in the second position, it extends at least partially above the storage space (1201).

2. The sliding plate structure according to claim 1, characterized in that: The guide member (21) has a through guide groove (2101), and the slider (22) is connected to a guide post (221) on the side near the guide member (21), and the guide post (221) is located in the guide groove (2101).

3. The sliding plate structure according to claim 1, characterized in that: The guide member (21) has a groove (2102), the slider (22) is located in the groove (2102) and abuts against the guide member (21), the surface of the groove (2102) has a protruding edge (211) extending along the length of the groove (2102), and the side of the slider (22) that abuts against the guide member (21) has a groove (2201) that cooperates with the protruding edge (211).

4. The sliding plate structure according to claim 1, characterized in that: The plate (3) has limiting grooves (301) on both sides near the mounting plate (1). The limiting grooves (301) extend along the length of the slider (22). The mounting plate (1) is provided with limiting members (13). The limiting members (13) are at least partially located in the limiting grooves (301) and cooperate with the limiting grooves (301).

5. The sliding plate structure according to claim 4, characterized in that: When the plate (3) is in the first position and the second position, the limiting member (13) is located at both ends of the limiting groove (301). One end of the limiting groove (301) has a notch (3011). When the plate (3) is in the first position, the limiting member (13) is located at the notch (3011). The limiting member (13) can move from the notch (3011) to outside the limiting groove (301).

6. A walking aid, comprising a front wheel frame (4) and a rear wheel frame (5), wherein a front roller (41) is mounted on the bottom of the front wheel frame (4), a rear roller (51) is mounted on the bottom of the rear wheel frame (5), and a handle (42) is connected to the end of the front wheel frame (4) away from the front roller (41), characterized in that: Includes the sliding plate structure as described in any one of claims 1-5, wherein the front wheel frame (4) is rotatably connected to the rear wheel frame (5), the end of the front wheel frame (4) away from the front roller (41) is connected to the rear end of the mounting plate (1), and the end of the rear wheel frame (5) away from the rear roller (51) is connected to the front end of the mounting plate (1).

7. A walking aid stroller according to claim 6, characterized in that: The mounting plate (1) has a sliding slot (101) extending through it in the front-rear direction. The front wheel frame (4) has a sliding post (43) at the end away from the front roller (41). The sliding post (43) slides in conjunction with the sliding slot (101). When the sliding post (43) is located near the front end of the mounting plate (1) of the sliding slot (101), the trolley is in a retracted state. When the sliding post (43) is located near the rear end of the mounting plate (1) of the sliding slot (101), the trolley is in a working state.

8. A walking aid stroller according to claim 7, characterized in that: The mounting plate (1) is provided with a positioning component (14), which includes a torsion spring (141), a buckle (142) and a transmission rod (143). The two ends of the torsion spring (141) are respectively connected to the mounting plate (1) and the buckle (142). The buckle (142) is rotatably connected to the mounting plate (1). The two ends of the transmission rod (143) are respectively connected to the rear wheel frame (5) and the buckle (142). When the trolley is in working state, the buckle (142) fixes the sliding column (43).

9. A walking aid stroller according to claim 6, characterized in that: A horizontally arranged anti-collision wheel disc (6) is fitted at the connection between the front wheel frame (4) and the front roller (41), and the anti-collision wheel disc (6) is rotatably connected to the front wheel frame (4).

10. A walking aid stroller according to claim 9, characterized in that: The anti-collision wheel (6) includes a wheel body (61) and a plug (62). The plug (62) cooperates with the wheel body (61) to form a ring structure. The wheel body (61) has a slot (6101) that extends along the periphery of the wheel body (61) to the axle. The plug (62) is detachably connected to the slot (6101).

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