A caster

Abstract

This utility model discloses a caster, relating to the field of luggage accessories technology. It includes a mounting part and a wheel body. The mounting part includes a mounting base with a receiving cavity and a limiting hole. The wheel body includes a connecting structure and a wheel structure. One end of the connecting structure is rotatably connected to the wheel structure, and the end of the connecting structure away from the wheel structure is detachably connected to the mounting base. The connecting structure includes a connecting rod, a connecting plate, a fixing block, and a limiting block. One end of the connecting rod passes through the bottom of the mounting base and is detachably connected to the connecting plate. The end of the connecting rod away from the mounting base is rotatably connected to the wheel structure. The end of the connecting plate away from the connecting rod is detachably connected to the fixing block. Both the connecting plate and the fixing block are disposed within the receiving cavity. A limiting groove extends from the bottom of the fixing block and is disposed within a limiting hole. The limiting block and the limiting groove are detachably connected. This utility model's caster requires minimal skill from the installer, significantly shortening installation time and effectively improving installation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of luggage accessories technology, specifically to a caster. Background Technology

[0002] Casters, as indispensable components in modern industry and daily life, come in various types to meet different needs. Common casters mainly fall into three categories: swivel casters, fixed casters, and swivel casters with brakes. Swivel casters, also known as universal casters, are widely used in luggage, trolleys, and other equipment. Taking luggage as an example, universal casters allow users to easily change direction while dragging luggage, enabling flexible movement in airport waiting halls, train station platforms, and city streets, greatly improving the convenience and comfort of travel.

[0003] However, traditional casters often use a large number of bolts and rivets to connect the mounting base and the wheel body. Some casters also require welding or stamping to fix the nuts. This requires high skill from the installers and is time-consuming and labor-intensive. In large-scale production scenarios, this will seriously affect production efficiency and make it difficult to meet the large market demand. Utility Model Content

[0004] Therefore, in order to solve the problem that traditional casters affect production efficiency during installation and are unable to meet the large market demand, the purpose of this utility model is to provide a caster, the specific technical solution of which is as follows:

[0005] A caster includes a mounting portion and a wheel body portion. The mounting portion includes a mounting base with a receiving cavity and a limiting hole. The wheel body portion includes a connecting structure and a wheel structure. One end of the connecting structure is rotatably connected to the wheel structure, and the end of the connecting structure away from the wheel structure is detachably connected to the mounting base. The connecting structure includes a connecting rod, a connecting plate, a fixing block, and a limiting block. One end of the connecting rod passes through the bottom of the mounting base and is detachably connected to the connecting plate. The end of the connecting rod away from the mounting base is rotatably connected to the wheel structure. The end of the connecting plate away from the connecting rod is detachably connected to the fixing block. Both the connecting plate and the fixing block are disposed within the receiving cavity. A limiting groove extends from the bottom of the fixing block and is disposed within a limiting hole. The limiting block is detachably connected to the limiting groove.

[0006] Compared with existing technologies, this utility model of caster has the following advantages: By providing a mounting section, including a mounting base for connecting to a suitcase, the mounting base has a receiving cavity. During assembly, the components can be installed in an orderly manner within the receiving cavity; during maintenance, it also facilitates the inspection and replacement of internal components. By providing a wheel body section for moving the suitcase, the wheel body section includes a connecting structure and a wheel structure. The connecting structure connects the mounting base and the wheel structure, and includes a connecting rod, a connecting plate, a fixing block, and a limiting block. Through the cooperation of the connecting rod, connecting plate, fixing block, and limiting block, the connecting structure can be correctly installed and fixed, improving the assembly accuracy of the caster. When the limiting block is inserted into the limiting groove, it can firmly fix the entire connecting structure on the mounting base, preventing loosening during use and ensuring the normal operation of the caster.

[0007] In some embodiments, a first connecting hole is provided at one end of the connecting plate. The first connecting hole includes a first connecting hole and a second connecting hole, which are connected. The radius of the first connecting hole is greater than the radius of the second connecting hole, and the radius of the second connecting hole is smaller than the radius of the connecting rod. A notch is provided at one end of the connecting rod, and the width of the notch is greater than the thickness of the connecting plate. The end of the connecting rod near the notch first passes through the first connecting hole and then moves towards the second connecting hole, so that the connecting rod abuts against the axial end face of the connecting plate.

[0008] In some embodiments, the connecting rod includes a first connecting rod, a rotating seat, and a second connecting rod. The first connecting rod, the rotating seat, and the second connecting rod are fixedly connected in sequence. The notch is located at the end of the first connecting rod away from the rotating seat. The end of the first connecting rod away from the rotating seat passes through the bottom of the mounting base and is detachably connected to the connecting plate. The rotating seat abuts against the wheel structure, and the second connecting rod is rotatably connected to the wheel structure.

[0009] In some embodiments, a partition is provided inside the fixing block to divide the fixing block into a first inner cavity and a second inner cavity. A limiting post is provided in the first inner cavity. A second connecting hole is provided at the end of the connecting plate away from the connecting rod. The connecting plate is engaged with the limiting post through the second connecting hole. The limiting groove is provided at the bottom end of the fixing block near the second inner cavity.

[0010] In some embodiments, the limiting block includes a limiting plate and a connecting block, the limiting plate and the connecting block are fixedly connected, the end of the connecting block away from the limiting plate engages with the limiting groove, and the length and width of the limiting plate are both greater than the length and width of the limiting hole.

[0011] In some embodiments, the wheel structure includes a wheel seat, a shaft, a hub, a wheel cover, and a bearing. The bearing is fitted onto the shaft, which passes through the hub and the wheel seat. The wheel cover has a mounting post that passes through the hub and is detachably connected to the shaft. The outer side of the hub is fitted with a wheel skin, and the end of the wheel seat away from the shaft is rotatably connected to the connecting rod.

[0012] In some embodiments, the mounting base includes a protective plate, which is detachably connected to the mounting base. The protective plate is provided with a plurality of connecting posts, and connecting pipes are provided on both sides of the mounting base outside the accommodating cavity. Each connecting post is engaged with a corresponding connecting pipe.

[0013] In some embodiments, a buffer structure is provided inside the wheel structure. The buffer structure is sleeved on the outside of the second connecting rod. The buffer structure includes a fixed seat, a first elastic element, and a movable seat. One end of the first elastic element is fixedly connected to the fixed seat, and the end of the first elastic element away from the fixed seat is fixedly connected to the movable seat. The end of the fixed seat away from the first elastic element is fixedly connected to the axial end face of the rotating seat, and the movable seat is rotatably connected to the wheel structure.

[0014] In some embodiments, the wheel body includes a locking structure disposed on the wheel structure. The locking structure includes a locking seat, a pressing block, a locking rod, a limiting member, and a second elastic member. The locking seat is fixedly connected to the wheel structure and has a receiving groove. The pressing block is disposed in the receiving groove, and the locking rod passes through the pressing block. Movable holes are provided on both sides of the locking seat, and the two ends of the locking rod pass through the movable holes on both sides of the locking seat. The limiting member is rotatably connected to the locking seat. One end of the second elastic member is fixedly connected to the pressing block, and the end of the second elastic member away from the pressing block is fixedly connected to the bottom of the receiving groove. A first stop and a second stop are disposed in the receiving groove. The first stop is disposed above the second stop. The limiting member has a first concave surface, a first side surface, a second concave surface, and a second side surface, which are sequentially connected to surround each other.

[0015] In some embodiments, a first buffer block is provided at the bottom of the receiving groove, and a second buffer block is provided on the pressing block. The first buffer block and the second buffer block are correspondingly arranged, and both the first buffer block and the second buffer block are located within the inner ring of the second elastic member. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the caster structure described in Embodiment 1 of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the caster structure described in Embodiment 1 of this utility model. Figure 2 ;

[0018] Figure 3 This is a cross-sectional view of the caster described in Embodiment 1 of this utility model;

[0019] Figure 4 This is an exploded view of the caster described in Embodiment 1 of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the mounting base described in Embodiment 1 of this utility model. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of the structure of the mounting base described in Embodiment 1 of this utility model. Figure 2 ;

[0022] Figure 7 This is a schematic diagram of the structure of the protective plate described in Embodiment 1 of this utility model;

[0023] Figure 8 This is a schematic diagram of the combined structure of the connection structure described in Embodiment 1 of this utility model;

[0024] Figure 9 This is a schematic diagram of the connecting rod described in Embodiment 1 of this utility model;

[0025] Figure 10 This is a schematic diagram of the connecting plate described in Embodiment 1 of this utility model;

[0026] Figure 11 This is a schematic diagram of the structure of the fixing block described in Embodiment 1 of this utility model. Figure 1 ;

[0027] Figure 12 This is a schematic diagram of the structure of the fixing block described in Embodiment 1 of this utility model. Figure 2 ;

[0028] Figure 13 This is a schematic diagram of the limiting block described in Embodiment 1 of this utility model;

[0029] Figure 14 This is a schematic diagram of the caster structure described in Embodiment 2 of this utility model. Figure 1 ;

[0030] Figure 15 This is a schematic diagram of the caster structure described in Embodiment 2 of this utility model. Figure 2 ;

[0031] Figure 16 This is a cross-sectional view of the caster described in Embodiment 2 of this utility model;

[0032] Figure 17 for Figure 16 A magnified structural diagram of A in the middle;

[0033] Figure 18 This is an exploded view of the caster described in Embodiment 2 of this utility model;

[0034] Figure 19 This is a schematic diagram of the combined structure of the locking structure and the wheel seat as described in Embodiment 2 of this utility model;

[0035] Figure 20 This is a schematic diagram of the buffer structure described in Embodiment 2 of this utility model;

[0036] Figure 21 This is a schematic diagram of the limiting member described in Embodiment 2 of this utility model;

[0037] Figure 22 This is a simplified schematic diagram of the initial state of the limiting member described in Embodiment 2 of this utility model;

[0038] Figure 23 This is a simplified illustration of the movement process of the limiting member described in Embodiment 2 of this utility model. Figure 1 ;

[0039] Figure 24 This is a simplified illustration of the movement process of the limiting member described in Embodiment 2 of this utility model. Figure 2 ;

[0040] Figure 25 This is a simplified illustration of the movement process of the limiting member described in Embodiment 2 of this utility model. Figure 3 ;

[0041] Figure 26 This is a simplified illustration of the movement process of the limiting member described in Embodiment 2 of this utility model. Figure 4 .

[0042] Figure label:

[0043] 1. Mounting section; 11. Mounting base; 111. Receiving cavity; 112. Limiting hole; 113. Connecting pipe; 114. Locking pipe; 115. Countersunk groove; 116. Limiting pipe; 12. Protective plate; 121. Connecting column; 122. Locking hole; 2. Wheel body; 21. Connecting structure; 211. Connecting rod; 2111. Notch; 2112. First connecting rod; 2113. Rotary seat; 21 14. Second connecting rod; 212. Connecting plate; 2121. First connecting hole; 21211. First connecting hole; 21212. Second connecting hole; 2122. Second connecting hole; 213. Fixing block; 2131. Limiting groove; 2132. First inner cavity; 2133. Second inner cavity; 214. Limiting block; 2141. Limiting plate; 2142. Connecting block; 215. Partition plate; 216. 217. Limiting post; 2171. Buffer structure; 2172. Fixed seat; 2173. First elastic element; 2174. Movable seat; 2175. Protrusion; 22. Wheel structure; 221. Wheel seat; 2211. Rotating groove; 222. Rotating shaft; 223. Wheel hub; 224. Wheel cover; 225. Bearing; 226. Mounting post; 227. Wheel skin; 23. Locking structure; 231. Locking seat; 2311. Receiving groove; 2312. Movable hole; 2313. First stop block; 2314. Second stop block; 232. Pressing block; 233. Locking rod; 234. Limiting element; 2341. First recessed surface; 2342. First side surface; 2343. Second recessed surface; 2344. Second side surface; 235. Second elastic element; 236. First buffer block; 237. Second buffer block. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and do not limit the scope of protection of this utility model.

[0045] It should be noted that "greater than", "less than", "exceeding", etc. are understood to exclude the number itself, "several" and "more than" mean one or more, and "above", "below", "within" etc. are understood to include the number itself. If the first or second is mentioned, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0046] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0047] The present invention will now be described in further detail with reference to the accompanying drawings.

[0048] Example 1

[0049] Figure 1 The diagram schematically shows a caster according to one embodiment of the present invention, including a mounting part 1 for connecting to a suitcase and a wheel body part 2 for movement.

[0050] like Figures 4-7 As shown, the mounting part 1 includes a mounting base 11 and a protective plate 12. The mounting base 11 is the basic structure of the mounting part 1, and it has a receiving cavity 111 inside, so that the components can be arranged in an orderly manner. The receiving cavity 111 has a limiting hole 112. The protective plate 12 is detachably connected to the mounting base 11. The protective plate 12 is used to protect the components inside the receiving cavity 111. The protective plate 12 is provided with several connecting posts 121. Connecting tubes 113 are provided on both sides of the mounting base 11 outside the receiving cavity 111. Each connecting post 121 is engaged with the corresponding connecting tube 113. During the assembly process, it is only necessary to align the connecting post 121 with the connecting tube 113 and apply a certain pressure to achieve quick connection, which greatly improves the assembly efficiency. In this embodiment, the protective plate 12 is provided with several locking holes 122, and locking tubes 114 are provided on both sides of the accommodating cavity 111 inside the mounting base 11. The protective plate 12 is detachably connected to the corresponding locking tubes 114 through the locking holes 122 using screws. The screw connection further enhances the connection strength between the protective plate 12 and the mounting base 11, making the connection between the two more stable and reliable. The bottom of the mounting base 11 is provided with a recess 115 that abuts against the wheel body 2. The recess 115 provides precise positioning for the connection between the wheel body 2 and the mounting base 11, so that the wheel body 2 can be accurately installed under the mounting base 11, ensuring the overall verticality and stability of the caster.

[0051] like Figure 2 As shown, the wheel body 2 includes a connecting structure 21 and a wheel structure 22. One end of the connecting structure 21 is rotatably connected to the wheel structure 22, and the end of the connecting structure 21 away from the wheel structure 22 is detachably connected to the mounting base 11. The connecting structure 21 is a key component for connecting the wheel structure 22 to the mounting part 1.

[0052] like Figure 3 , Figure 4 and Figure 8 As shown, the connecting structure 21 includes a connecting rod 211, a connecting plate 212, a fixing block 213, and a limiting block 214. One end of the connecting rod 211 passes through the bottom of the mounting base 11 and is detachably connected to the connecting plate 212. The end of the connecting rod 211 away from the mounting base 11 is rotatably connected to the wheel structure 22. The end of the connecting plate 212 away from the connecting rod 211 is detachably connected to the fixing block 213. Both the connecting plate 212 and the fixing block 213 are disposed within the receiving cavity 111. Figure 12As shown, a limiting groove 2131 extends from the bottom of the fixing block 213 to cooperate with the limiting block 214, further limiting and fixing the entire connecting structure 21. The limiting groove 2131 is located within the limiting hole 112. The limiting hole 112 is provided on the receiving cavity 111 to provide an installation channel for the limiting block 214, allowing the limiting block 214 to smoothly cooperate with the limiting groove 2131 at the bottom of the fixing block 213. The position and size of the limiting hole 112 need to correspond to the position and size of the limiting groove 2131. The limiting block 214 and the limiting groove 2131 are detachably connected. The shape and size of the limiting groove 2131 need to be precisely set according to the shape and size of the limiting block 214 to ensure a tight fit between the two.

[0053] like Figure 5 As shown, in this embodiment, a limiting tube 116 is provided inside the accommodating cavity 111. The limiting tube 116 passes through the recess 115. One end of the connecting rod 211 passes through the recess 115 and the limiting tube 116 in sequence and is detachably connected to the connecting plate 212. The connecting plate 212 abuts against the limiting tube 116. The setting of the limiting tube 116 provides precise guidance for the installation of the connecting rod 211, ensuring that the connecting rod 211 can accurately pass through the mounting base 11 and connect to the connecting plate 212.

[0054] like Figure 10 As shown, a first connecting hole 2121 is provided at one end of the connecting plate 212. The first connecting hole 2121 includes a first connecting hole 21211 and a second connecting hole 21212. The first connecting hole 21211 and the second connecting hole 21212 are connected. The radius of the first connecting hole 21211 is larger than the radius of the second connecting hole 21212. The radius of the second connecting hole 21212 is smaller than the cross-sectional radius of the connecting rod 211. A notch 2111 is provided at one end of the connecting rod 211. The notch 2111 is for connecting the connecting rod 211 to the connecting plate 212. The width of the notch 2111 is greater than the thickness of the connecting plate 212. During assembly, the end of the connecting rod 211 closest to the notch 2111 first passes through the first connecting hole 21211 in the first connecting hole 2121 opened at one end of the connecting plate 212, and then moves towards the second connecting hole 21212, so that the connecting rod 211 abuts against the axial end face of the connecting plate 212. This not only achieves a stable connection between the connecting rod 211 and the connecting plate 212, but also provides a certain amount of room for movement, allowing the connecting plate 212 to be finely adjusted within a certain range when subjected to a certain external force, thereby adapting to different working conditions and improving the flexibility and reliability of the caster. The center point of the second connecting hole 21212 is on the same straight line as the center point of the limiting tube 116, ensuring the symmetry and balance of the connection between the connecting rod 211 and the connecting plate 212, reducing stress concentration caused by uneven force, and extending its service life.

[0055] like Figure 9As shown, the connecting rod 211 includes a first connecting rod 2112, a rotating seat 2113, and a second connecting rod 2114. The first connecting rod 2112, the rotating seat 2113, and the second connecting rod 2114 are fixedly connected in sequence. The first connecting rod 2112 is responsible for connecting to the mounting base 11 and the connecting plate 212. The second connecting rod 2114 is rotatably connected to the wheel structure 22. The rotating seat 2113 plays the role of connection and rotation, enabling the wheel body 2 to rotate flexibly relative to the mounting base 11. The notch 2111 is located at the end of the first connecting rod 2112 away from the rotating seat 2113. The shape and size of the notch 2111 need to be precisely designed according to the connection method with the connecting plate 212 so as to match the corresponding structure on the connecting plate 212. The end of the first connecting rod 2112 furthest from the rotary seat 2113 passes through the bottom of the mounting base 11 and is detachably connected to the connecting plate 212. During its passage through the bottom of the mounting base 11, the verticality and positional accuracy of the first connecting rod 2112 must be ensured to prevent wobbling or displacement during subsequent use. The rotary seat 2113 abuts against the wheel structure 22, ensuring a tight fit between them, allowing the rotary seat 2113 to effectively transmit rotational power to the wheel structure 22.

[0056] like Figures 11-12 As shown, a partition 215 is provided inside the fixing block 213, dividing the fixing block 213 into a first inner cavity 2132 and a second inner cavity 2133. Different inner cavities can be used to install different components or perform different functions. A limit post 216 is provided in the first inner cavity 2132. A second connecting hole 2122 is opened at the end of the connecting plate 212 away from the connecting rod 211. The shape and size of the second connecting hole 2122 are adapted to the limit post 216. The connecting plate 212 is engaged with the limit post 216 through the second connecting hole 2122, thus fixing the connecting plate 212 and effectively limiting its movement in the horizontal and vertical directions, enhancing the connection stability between the connecting plate 212 and the fixing block 213. Even when the caster is subjected to a large external impact or frequent vibration, the connecting plate 212 will not easily separate from the fixing block 213, thereby ensuring the reliability of the entire connection structure 21. The limiting groove 2131 is located at the bottom end of the fixing block 213 near the second inner cavity 2133. In this embodiment, the edge of the limiting groove 2131 is chamfered or rounded to avoid scratching and damage to it when installing the limiting block 214. When the limiting block 214 is inserted into the limiting groove 2131, the two will form a tight fit, and the limiting block 214 can be accurately embedded in the limiting groove 2131.

[0057] like Figure 13As shown, the limiting block 214 includes a limiting plate 2141 and a connecting block 2142. The limiting plate 2141 and the connecting block 2142 are fixedly connected. The end of the connecting block 2142 away from the limiting plate 2141 is engaged with the limiting groove 2131. The length and width of the limiting plate 2141 are both greater than the length and width of the limiting hole 112. When the limiting block 214 passes through the limiting hole 112 and engages with the limiting groove 2131, the limiting plate 2141 can be locked outside the limiting hole 112, preventing the limiting block 214 from completely entering the receiving cavity 111. It also plays a limiting role, so that the limiting block 214 can effectively restrict the position of the fixing block 213 and prevent it from coming out of the limiting hole 112, thereby improving the stability of the entire connection structure 21.

[0058] like Figure 4 As shown, the wheel structure 22 includes a wheel seat 221, a shaft 222, a wheel hub 223, a wheel cover 224, and a bearing 225. The bearing 225 is sleeved on the shaft 222, which passes through the wheel hub 223 and the wheel seat 221. A mounting post 226 is provided on the wheel cover 224, which passes through the wheel hub 223 and is detachably connected to the shaft 222. A wheel skin 227 is sleeved on the outer side of the wheel hub 223. The end of the wheel seat 221 away from the shaft 222 is rotatably connected to the connecting rod 211. In this embodiment, the wheel skin 227 is made of TPE (Thermoplastic Elastomer) material. In this embodiment, the wheel skin 227 is clamped to the outside of the wheel hub 223. The wheel seat 221 has a connecting groove at the end away from the rotating shaft 222 to accommodate the second connecting rod 2114. The second connecting rod 2114 is inserted into the connecting groove and engages with the wheel seat 221 to achieve rotation. The radius of the rotating seat 2113 is larger than the radius of the connecting groove opening. The wheel cover 224 covers the wheel hub 223 and is fixed to the rotating shaft 222. It can hide the rotating shaft 222 and effectively protect the internal components of the wheel hub 223, preventing dust, moisture, etc. from entering the interior of the wheel hub 223 and affecting the normal operation of the components.

[0059] In this embodiment, the caster is assembled as follows: First, the wheel structure 22 is assembled. Assembling the wheel structure 22 requires installing the bearing 225. The bearing 225 is fitted onto the shaft 222, ensuring it is properly installed. Then, the shaft 222 with the bearing 225 is passed through the center hole of the wheel hub 223, allowing the wheel hub 223 to be accurately mounted on the shaft 222. Next, the wheel cover 227 is tightened around the wheel hub 223. The mounting post 226 on the wheel cover 224 is aligned with the corresponding hole on the wheel hub 223. The wheel cover 224 is gently pressed down, allowing the mounting post 226 to pass through the wheel hub 223 and connect to the shaft 222. Then, the second connecting rod 2114 of the connecting rod 211 is inserted into the connecting groove on the wheel seat 221, causing the second connecting rod 2114 to engage with the connecting groove. Pass the assembled connecting rod 211 through the recess 115 at the bottom of the mounting base 11 and the limiting tube 116 inside the accommodating cavity 111. Place the first connecting hole 21211 of the first connecting hole 2121 on the connecting rod 211 at the end with the notch 2111. Gently push the connecting plate 212 so that the end of the connecting rod 211 near the notch 2111 passes through the first connecting hole 21211 first, and then moves towards the second connecting hole 21212, so that the connecting rod 211 abuts against the axial end face of the connecting plate 212. Subsequently, the second connecting hole 2122 at the end of the connecting plate 212 away from the connecting rod 211 is aligned with the limiting post 216 in the first inner cavity 2132 of the fixing block 213. Then, the connecting plate 212 is sleeved on the limiting post 216 to ensure that the connecting plate 212 and the limiting post 216 are firmly engaged. The end of the connecting block 2142 away from the limiting plate 2141 is engaged with the limiting groove 2131 at the bottom of the fixing block 213. At this time, the axial end face of the limiting plate 2141 abuts against the mounting base 11, and the limiting plate 2141 is engaged outside the limiting hole 112. Finally, place the protective plate 12 above the receiving cavity 111 of the mounting base 11, aligning the connecting post 121 on the protective plate 12 with the connecting tubes 113 on both sides of the receiving cavity 111 inside the mounting base 11, and aligning the locking hole 122 on the protective plate 12 with the locking tubes 114 on both sides of the receiving cavity 111 inside the mounting base 11. Gently press the protective plate 12 down to engage the connecting post 121 on the protective plate with the connecting tubes 113 inside the mounting base 11. If reinforcement of the protective plate 12 is required, screws are screwed into the locking tubes 114 inside the mounting base 11 through the locking hole 122 on the fixed plate to achieve reinforcement.

[0060] This embodiment also provides a suitcase, including a suitcase body and casters as described above, wherein the casters are detachably connected to the suitcase body.

[0061] Example 2

[0062] This utility model also provides an embodiment 2, such as Figures 14-21As shown, as a modified structure of Embodiment 1, Embodiment 2 differs from Embodiment 1 only in the specific structure of the wheel body 2, as detailed below:

[0063] like Figure 16 , Figure 17 As shown, a buffer structure 217 is provided inside the wheel structure 22. Specifically, the buffer structure 217 is located in the connecting groove of the wheel seat 221 and is sleeved on the outside of the second connecting rod 2114. The buffer structure 217 can effectively absorb and buffer the impact force on the casters, making the suitcase move more smoothly, reducing the vibration caused by bumps transmitted to the suitcase body, thereby improving the user's comfort when pushing and pulling the suitcase and avoiding the discomfort caused by frequent vibrations. Figure 20 As shown, the buffer structure 217 includes a fixed seat 2171, a first elastic element 2172, and a movable seat 2173. One end of the first elastic element 2172 is fixedly connected to the fixed seat 2171, and the end of the first elastic element 2172 away from the fixed seat 2171 is fixedly connected to the movable seat 2173. The end of the fixed seat 2171 away from the first elastic element 2172 is fixedly connected to the axial end face of the rotating seat 2113. The movable seat 2173 is rotatably connected to the wheel structure 22. Specifically, the movable seat 2173 is rotatably connected to the wheel seat 221. A rotating groove 2211 is provided in the connecting groove. Several protrusions 2174 are provided on the movable seat 2173. Each protrusion 2174 is disposed in the rotating groove 2211 and abuts against the rotating groove 2211. When the suitcase caster encounters an impact during movement, such as traversing an uneven surface or being struck, the movable seat 2173 moves upward under the push of the wheel seat 221. This exerts a compressive force on the first elastic element 2172, causing it to elastically compress and deform, thus hindering the movable seat 2173 from moving further upward. Once the caster has passed the uneven surface or impacted object, the upward impact force disappears. At this point, the first elastic element 2172, having previously stored elastic potential energy through compression, generates a downward elastic force, pushing the fixed seat 2171 downward, which in turn causes the wheel seat 221 and the caster to return to their initial positions.

[0064] like Figure 15 As shown, the wheel body 2 includes a locking structure 23, which is disposed on the wheel structure 22, as follows: Figure 18 , Figure 19As shown, the locking structure 23 includes a locking seat 231, a pressing block 232, a locking rod 233, a limiting member 234, and a second elastic member 235. The locking seat 231 has a receiving groove 2311, the pressing block 232 is disposed in the receiving groove 2311, and the locking rod 233 passes through the pressing block 232. The locking seat 231 has movable holes 2312 on both sides, and the two ends of the locking rod 233 pass through the movable holes 2312 on both sides of the locking seat 231 respectively. When the locking rod 233 is fixed in position, it can prevent the wheel hub 223 from rotating, thereby realizing the locking of the caster. One end of the second elastic element 235 is fixedly connected to the pressing block 232, and the end of the second elastic element 235 away from the pressing block 232 is fixedly connected to the bottom of the receiving groove 2311. The second elastic element 235 provides power for the reset of the pressing block 232. When the operator releases the pressing block 232, the second elastic element 235 can quickly spring the pressing block 232 back to its original position, ensuring that the locking structure 23 can automatically return to its initial state, preparing for the next operation and improving the convenience and efficiency of operation. A first stop 2313 and a second stop 2314 are provided in the receiving groove 2311. The first stop 2313 is located above the second stop 2314, and the limiting member 234 is rotatably connected to the locking seat 231.

[0065] like Figure 21As shown, the limiting member 234 is provided with a first recessed surface 2341, a first side surface 2342, a second recessed surface 2343, and a second side surface 2344. The first recessed surface 2341, the first side surface 2342, the second recessed surface 2343, and the second side surface 2344 are sequentially connected and enclosed. The connection between the first recessed surface 2341, the first side surface 2342, the second recessed surface 2343, and the second side surface 2344 are all rounded. The limiting member 234, through its cooperation with the first stop block 2313 and the second stop block 2314, and its own rotation, achieves the fixing and releasing of the locking rod 233, thereby controlling the locking and unlocking states of the caster. In this embodiment, the locking seat 231 and the wheel seat 221 are integrally formed. The first recessed surface 2341 and the second recessed surface 2343 are centrally symmetrically arranged, and the first side surface 2342 and the second side surface 2344 are centrally symmetrically arranged. A first buffer block 236 is provided on the bottom of the receiving groove 2311, and a second buffer block 237 is provided on the pressing block 232. The first buffer block 236 and the second buffer block 237 are correspondingly arranged and are both located within the inner ring of the second elastic element 235. During the pressing of the pressing block 232, the second elastic element 235 is compressed to store elastic potential energy, providing power for the reset of the pressing block 232. The first buffer block 236 at the bottom of the receiving groove 2311 and the second buffer block 237 on the pressing block 232 can contact each other when the pressing block 232 is pressed down to a certain extent. When they contact each other, an additional resistance is formed, preventing the pressing block 232 from pressing down further, thereby effectively limiting the compression degree of the second elastic element 235, ensuring that the second elastic element 235 plays an elastic role within the normal working range, ensuring that the pressing block 232 can be reset smoothly, extending the service life of the second elastic element 235, and reducing the maintenance cost of the caster locking structure 23.

[0066] like Figures 22-24As shown, when the caster needs to be locked, firstly, press the pressing block 232 downwards towards the bottom of the receiving groove 2311. During the pressing process, the pressing block 232 drives the locking rod 233 downwards. At this time, the second recessed surface 2343 on the limiting member 234 begins to contact and gradually abut against the second stop 2314. As the pressing block 232 continues to press down, the limiting member 234 rotates counterclockwise along the contour of the second recessed surface 2343 until the second stop 2314 and the second recessed surface 2343 are fully abutted. At this time, release the pressing block 232. Since the second elastic member 235 is in a compressed state, With the elasticity to restore its original shape, it will quickly push the pressing block 232 upward. During the upward process of the pressing block 232, the first concave surface 2341 and the first stop block 2313 gradually approach and finally abut, thereby fixing the limiting member 234. At this time, the position of the locking rod 233 remains constant. The locking rod 233 is horizontal in the rotation path of the wheel hub 223. When the wheel hub 223 tries to rotate, it will be blocked by the locking rod 233 and thus stop rotating. The caster is successfully locked and cannot move freely.

[0067] See Figures 25-26 As shown, when the caster needs to be unlocked, the pressing block 232 is pressed down again towards the bottom of the receiving groove 2311. At this time, the first side 2342 of the limiting member 234 abuts against the second stop 2314. As the pressing block 232 continues to be pressed down, the limiting member 234 rotates counterclockwise along the first side 2342. During the rotation, the contact position between the first side 2342 and the second stop 2314 changes continuously, and the limiting member 234 gradually gets rid of the restriction of the first stop 2313. Continue to press down the pressing block 232 until the first side 2342 is completely away from the second stop 2314. Release the pressing block 232, and the second elastic member 235 quickly pushes the pressing block 232 up to reset. The limiting member 234 will return to its initial position under the action of its own weight and structural force, and the locking rod 233 will also return to a free-moving state, no longer hindering the rotation of the wheel hub 223. Since the first recessed surface 2341 and the second recessed surface 2343 are centrally symmetrically arranged, and the first side surface 2342 and the second side surface 2344 are centrally symmetrically arranged, when the caster is locked and unlocked again, the first recessed surface 2341 and the second recessed surface 2343, and the first side surface 2342 and the second side surface 2344 work according to the same principle, which will not be described in detail here.

[0068] This embodiment also provides a suitcase, including a suitcase body and casters as described above, wherein the casters are detachably connected to the suitcase body.

[0069] The caster in the above embodiment has a reasonable structural design and is easy to use. This structure can also be used for other equipment with similar usage requirements. In the above embodiment, the caster requires low skill from the installer, which can significantly shorten the installation time and effectively improve the installation efficiency.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0071] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A caster, characterized in that, include: The mounting part includes a mounting base, the mounting base having a receiving cavity, and the receiving cavity having a limiting hole; The wheel body includes a connecting structure and a wheel structure. One end of the connecting structure is rotatably connected to the wheel structure, and the end of the connecting structure away from the wheel structure is detachably connected to the mounting base. The connecting structure includes a connecting rod, a connecting plate, a fixing block, and a limiting block. One end of the connecting rod passes through the bottom of the mounting base and is detachably connected to the connecting plate. The end of the connecting rod away from the mounting base is rotatably connected to the wheel structure. The end of the connecting plate away from the connecting rod is detachably connected to the fixing block. Both the connecting plate and the fixing block are disposed within the accommodating cavity. A limiting groove extends from the bottom of the fixing block and is disposed within the limiting hole. The limiting block is detachably connected to the limiting groove.

2. The caster according to claim 1, characterized in that, One end of the connecting plate is provided with a first connecting hole, which includes a first connecting hole and a second connecting hole. The first connecting hole and the second connecting hole are connected. The radius of the first connecting hole is greater than the radius of the second connecting hole, and the radius of the second connecting hole is smaller than the radius of the connecting rod. One end of the connecting rod is provided with a notch, the width of which is greater than the thickness of the connecting plate. The end of the connecting rod near the notch first passes through the first connecting hole and then moves towards the second connecting hole, so that the connecting rod abuts against the axial end face of the connecting plate.

3. The caster according to claim 2, characterized in that, The connecting rod includes a first connecting rod, a rotating seat, and a second connecting rod. The first connecting rod, the rotating seat, and the second connecting rod are fixedly connected in sequence. The notch is located at the end of the first connecting rod away from the rotating seat. The end of the first connecting rod away from the rotating seat passes through the bottom of the mounting base and is detachably connected to the connecting plate. The rotating seat abuts against the wheel structure, and the second connecting rod is rotatably connected to the wheel structure.

4. The caster according to claim 1, characterized in that, The fixing block is provided with a partition to divide the fixing block into a first inner cavity and a second inner cavity. A limit post is provided in the first inner cavity. A second connecting hole is opened at the end of the connecting plate away from the connecting rod. The connecting plate is engaged with the limit post through the second connecting hole. The limit groove is provided at the bottom end of the fixing block near the second inner cavity.

5. The caster according to claim 1, characterized in that, The limiting block includes a limiting plate and a connecting block. The limiting plate and the connecting block are fixedly connected. The end of the connecting block away from the limiting plate engages with the limiting groove. The length and width of the limiting plate are both greater than the length and width of the limiting hole.

6. The caster according to claim 1, characterized in that, The wheel structure includes a wheel seat, a shaft, a hub, a wheel cover, and a bearing. The bearing is fitted onto the shaft, which passes through the hub and the wheel seat. A connecting post is provided on the wheel cover, which passes through the hub and is detachably connected to the shaft. A wheel skin is fitted onto the outer side of the hub, and the end of the wheel seat away from the shaft is rotatably connected to the connecting rod.

7. The caster according to claim 1, characterized in that, The mounting base includes a protective plate, which is detachably connected to the mounting base. The protective plate is provided with a plurality of connecting posts. Connecting pipes are provided on both sides of the mounting base outside the accommodating cavity, and each connecting post is engaged with the corresponding connecting pipe.

8. The caster according to claim 3, characterized in that, A buffer structure is provided inside the wheel structure. The buffer structure is sleeved on the outside of the second connecting rod. The buffer structure includes a fixed seat, a first elastic element, and a movable seat. One end of the first elastic element is fixedly connected to the fixed seat. The end of the first elastic element away from the fixed seat is fixedly connected to the movable seat. The end of the fixed seat away from the first elastic element abuts against the axial end face of the rotating seat. The movable seat is rotatably connected to the wheel structure.

9. The caster according to claim 1, characterized in that, The wheel body includes a locking structure disposed on the wheel structure. The locking structure includes a locking seat, a pressing block, a locking rod, a limiting member, and a second elastic member. The locking seat is fixedly connected to the wheel structure and has a receiving groove. The pressing block is disposed in the receiving groove, and the locking rod passes through the pressing block. Movable holes are provided on both sides of the locking seat, and the two ends of the locking rod pass through the movable holes on both sides of the locking seat respectively. The limiting member is rotatably connected to the locking seat. One end of the second elastic member is fixedly connected to the pressing block, and the end of the second elastic member away from the pressing block is fixedly connected to the bottom of the receiving groove. A first stop and a second stop are disposed in the receiving groove. The first stop is disposed above the second stop. The limiting member has a first concave surface, a first side surface, a second concave surface, and a second side surface, which are sequentially connected to surround each other.

10. The caster according to claim 9, characterized in that, A first buffer block is provided at the bottom of the receiving groove, and a second buffer block is provided on the pressing block. The first buffer block and the second buffer block are provided correspondingly, and both the first buffer block and the second buffer block are located within the inner ring of the second elastic member.

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