Wire storage device
Patent Information
- Application Number
- CN202310573029.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-05-19
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2043-05-19
AI Technical Summary
[0004]但是,这种结构的线辊由于结构固定且较为简单,在使用或者非使用状态下,其占用空间难以改变,这会导致线辊在不使用时会占用较大的空间,从而导致线材存储仓库内的仓储空间利用率较低
1.在支撑杆上设置多个存放单元使得多个存放单元在使用时能够分别绕设不同种类的线材或者是相同种类的多捆线材,而存放单元则是包括套管以及多个铰接在套管外壁上的承托板,承托板与套管之间的铰接使得承托板在不使用时能够通过绕铰接轴轴线转动方式起到减少承托板的占用空间的作用;同时,相邻两根套管上的抵接板与吊装部之间的插接配合使得相邻两个套管之间的连接便于分开,方便后续对不使用的存放单元进行单独保存,进一步的节省了占用空间,达到了提高空间利用率的效果。
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Figure CN116553278B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wire storage, and in particular to a wire storage device. Background Technology
[0002] In the production process of rivet nuts, materials such as carbon steel wire are usually used. Currently, for linear materials such as carbon steel wire, the wire is usually wound on a wire roller to prevent the wires from crossing and knotting, so as to facilitate subsequent storage and transportation.
[0003] Currently, the wire rollers used for winding wire typically include a roller and limiting plates respectively set at both ends of the roller. The wire is wound on the roller, and the limiting plates prevent the wire wound on the roller from coming off from both ends of the roller. The wire is then transferred by moving the wire roller or moved to a warehouse for storage by moving the wire roller.
[0004] However, because this type of wire roller has a fixed and relatively simple structure, its space occupation is difficult to change whether it is in use or not. This results in the wire roller occupying a large space when not in use, leading to low storage space utilization in the wire storage warehouse. Summary of the Invention
[0005] In order to improve the utilization rate of storage space in warehouses, this application provides a wire storage device.
[0006] The wire storage device provided in this application adopts the following technical solution: The device includes a base, a support rod, and multiple storage units. The support rod is vertically fixed to the base. Each storage unit includes a sleeve and multiple support plates. The support plates are hinged to the outer wall of the sleeve and distributed circumferentially on the sleeve. The end of each support plate away from the sleeve can be connected to the outer wall of the sleeve. One end of the sleeve is provided with an abutment plate, and the other end of the sleeve is provided with a lifting part. The side of the abutment plate away from the sleeve is provided with a insertion groove. The lifting parts and insertion grooves on two adjacent sleeves are connected by an insertion fit. Each sleeve can rotate around the axis of the support rod on the support rod, and each support plate can be connected to the outer wall of the sleeve after rotation.
[0007] By adopting the above technical solution, multiple storage units are set on the support rod, allowing each storage unit to be wound with different types of wires or multiple bundles of the same type of wire during use. The support plate is used to separate adjacent bundles of wires to prevent them from intertwining and tangling. Simultaneously, the sleeves on the support rod can rotate around the axis of the support rod, allowing each sleeve to rotate around the axis of the support rod when pulling the wire. When the storage unit is not in use, the support plate can be driven to rotate around the axis of the hinge shaft, so that the end of the support plate away from the hinge shaft is connected to the outer wall of the sleeve. This reduces the space occupied by the support plate when not in use. Furthermore, the insertion and engagement between the abutment plates on adjacent sleeves and the lifting part facilitates the separation of the connection between adjacent sleeves, making it convenient to store unused storage units separately, further saving space and improving space utilization.
[0008] Optionally, a reinforcing part is provided on the outer wall of the casing at the position corresponding to the support plate. The support plate is hinged to the reinforcing part. A receiving groove is provided on the side of the reinforcing part away from the outer wall of the casing. The receiving groove is used to receive the support plate.
[0009] By adopting the above technical solution, the reinforcing part is provided with a receiving groove for accommodating the support plate, so that the support plate can be put into the receiving groove when not in use, thereby reducing the space occupied by the support plate when not in use. At the same time, it also prevents the surface of the support plate from easily developing scratches or burrs when not in use, thus preventing the surface of the wire from being easily damaged when placed on the support plate.
[0010] Optionally, a limiting plate is hinged to the side of the support plate away from the reinforcing part. The limiting plate is perpendicular to the support plate. A torsion spring is provided at the hinge point between the support plate and the limiting plate. A through hole is provided on the limiting plate, and a connector is inserted through the through hole. After the connector passes through the through hole, it can be connected to the support plate by means of thread engagement.
[0011] By adopting the above technical solution, the limiting plate is used to prevent the wire placed on the support plate from coming off the support plate. The torsion spring prevents the limiting plate from easily rotating with the hinge axis of the support plate, improving the reliability of the limiting plate in limiting the wire. The limiting plate is hinged to the support plate, allowing it to rotate around the hinge axis when not in use, thus changing the limiting plate from a state perpendicular to the support plate to a state parallel to the support plate. Subsequently, a connector is used to connect the limiting plate and the support plate, restricting the limiting plate from changing from a state parallel to the support plate to a state perpendicular to the support plate under the action of the torsion spring. Finally, the connection between the support plate and the sleeve allows the limiting plate to remain parallel to the sleeve axis, reducing the space occupied by the limiting plate when not in use.
[0012] Optionally, the limiting plate includes a limiting part and an abutting part that are fixedly connected. The limiting part is located on the side of the support plate near the lifting part, and the abutting part is located on the side of the support plate near the abutting plate. The end face of the abutting part and the end face of the abutting plate away from the support plate are at the same height.
[0013] By adopting the above scheme, when the limiting plate is in use, the limiting plate and the supporting plate remain perpendicular, and the abutting part of the limiting plate and the end face of the abutting plate away from the supporting plate are at the same height, so that when the sleeve is removed from the support rod, it can be placed stably on the ground, and the abutting part plays a role in maintaining the stability of the sleeve.
[0014] Optionally, the support rod is also equipped with a number of wire-laying assemblies corresponding to the number of sleeves. Each wire-laying assembly includes a collar, a telescopic connecting rod, and a wire-laying plate. Each collar and each sleeve are alternately fitted on the support rod. One end of the collar can be inserted into the hoisting part, and the other end of the collar can be inserted into the insertion slot. One end of the telescopic connecting rod is connected to the outer wall of the collar, and the other end of the telescopic connecting rod is perpendicularly connected to the wire-laying plate. The wire-laying plate is parallel to the support rod and has a wire-passing groove.
[0015] By adopting the above technical solution, the number of wire feeding components corresponds to the number of sleeves, so that each bundle of wire can be fed through the corresponding wire feeding component when it is placed on the support plate on different sleeves, thus making the wire usable smoothly. At the same time, the wire end passes out from the wire threading groove, which allows the wire to be smoothly pulled out from the wire threading groove.
[0016] Optionally, a connecting rod and a sleeve are provided inside the wire-passing groove. The two ends of the connecting rod are connected to the side wall of the wire-passing groove, the axis of the connecting rod is perpendicular to the support plate, and the sleeve is fitted on the connecting rod and can rotate around the axis of the connecting rod.
[0017] By adopting the above technical solution, when the wire is pulled out from the wire groove, the outer surface of the wire contacts the outer surface of the sleeve. The sleeve is fitted on the connecting rod and can rotate around the axis of the connecting rod. This reduces the friction force experienced by the wire when it is pulled out, making it easier to pull the wire out of the groove for use.
[0018] Optionally, the telescopic connecting rod includes telescopic rod one, telescopic rod two, and a spring. One end of telescopic rod one is connected to the outer wall of the sleeve, and the other end of telescopic rod one is sleeved on telescopic rod two. The spring is located inside telescopic rod one and connected to telescopic rod two. The end of telescopic rod two away from telescopic rod one is perpendicularly connected to the wire feeding plate. Telescopic rod two and telescopic rod one are in sliding fit.
[0019] By adopting the above technical solution, when the wire is released using the wire release plate, the spring inside the telescopic rod is in the tension position, and the wire release plate is located on the outside of the wire. As the spring tends to return to its original length, the wire release plate always abuts against the outside of the wire, thereby limiting the wire and preventing it from coming off the support plate due to the traction of the wire during the process of being pulled out and rotated.
[0020] Optionally, a connecting block is provided on the side of the support plate near the abutment plate, and two parallel connecting plates are provided on the abutment plate corresponding to the position of the connecting block. A slot for the connecting block to be inserted is formed between the two connecting plates. Both connecting plates are provided with connecting holes, and locking elements are inserted into the connecting holes. The locking elements are used to restrict the rotation of the support plate around the hinge axis.
[0021] By adopting the above technical solution, the locking component prevents the support plate from easily rotating around the hinge axis. Consequently, when the casing is placed on the ground, in addition to using the connection between the overhead crane and the lifting part on the casing for lifting, the casing can also be moved by forklift.
[0022] Optionally, rotating components are evenly arranged on the base corresponding to the positions of the abutment part and the limiting plate. The rotating components include a ball bearing and a connecting post. The ball bearing is hinged in the connecting post. The ball bearing can abut against the abutment part and the abutment plate. The end of the connecting post away from the ball bearing is vertically inserted into the base.
[0023] By adopting the above technical solution, the rotating component can support and assist the rotation of the abutment plate on the lowest sleeve of the support rod, thereby enabling the lowest sleeve of the support rod to rotate smoothly around the axis of the support rod.
[0024] In summary, this application includes at least the following beneficial technical effects: 1. Multiple storage units are installed on the support rod, allowing different types of wires or multiple bundles of the same type of wire to be wound around them during use. Each storage unit includes a sleeve and multiple support plates hinged to the outer wall of the sleeve. The hinge between the support plates and the sleeve allows the support plates to rotate around the hinge axis when not in use, thus reducing the space occupied by the support plates. At the same time, the insertion and engagement between the abutment plates on two adjacent sleeves and the lifting part makes it easy to separate the connection between two adjacent sleeves, facilitating the individual storage of unused units and further saving space, thereby improving space utilization.
[0025] 2. By setting a connecting rod and a sleeve on the connecting rod in the wire groove, and the sleeve can rotate around the axis of the connecting rod, the friction force on the wire when it is pulled out is reduced, thus making the wire easier to pull out. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a wire storage device according to this application when storing wires; Figure 2 yes Figure 1 A three-dimensional structural diagram of the storage unit (when the support plate is retracted) and the wire feeding assembly; Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure from another perspective; Figure 4 yes Figure 2 Enlarged view of point A in the middle; Figure 5 yes Figure 1 The main view; Figure 6 yes Figure 5 Enlarged view of point B in the middle; Figure 7 yes Figure 5 A cross-sectional schematic diagram.
[0027] Explanation of reference numerals in the attached drawings: 1. Base; 2. Support rod; 3. Storage unit; 4. Sleeve; 5. Support plate; 6. Lifting part; 7. Abutment plate; 8. Insertion groove; 9. Reinforcing part; 10. Receiving groove; 11. Limiting plate; 12. Torsion spring; 13. Limiting part; 14. Abutment part; 15. Through hole; 16. Connecting piece; 17. Cable feeding assembly; 18. Collar; 19. Telescopic connecting rod; 20. Cable feeding plate; 21. Cable feeding groove; 22. Connecting rod; 23. Rod sleeve; 24. Telescopic rod one; 25. Telescopic rod two; 26. Spring; 27. Connecting block; 28. Connecting plate; 29. Slot; 30. Locking part; 31. Rotating part; 32. Ball bearing; 33. Connecting column; Detailed Implementation The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.
[0028] This application discloses a wire storage device, referring to... Figure 1 , Figure 2 and Figure 3 It includes a base 1, a support rod 2, multiple storage units 3, and a number of wire feeding assemblies 17 corresponding to the number of storage units 3. The base 1 is placed on the ground, and the support rod 2 is vertically fixed to the base 1. The storage units 3 and the wire feeding assemblies 17 are alternately sleeved on the support rod 2 along the axis of the support rod 2, and each storage unit 3 and each wire feeding assembly 17 can rotate around the axis of the support rod 2.
[0029] The storage unit 3 includes a sleeve 4 and four support plates 5. The end of the sleeve 4 near the base 1 is provided with an abutment plate 7, and the end of the sleeve 4 away from the base 1 is provided with a lifting part 6. This allows the sleeve 4 to be sleeved on the support rod 2 by lifting. The sleeve 4 is coaxially sleeved on the support rod 2 and can rotate around the axis of the support rod 2. Four reinforcing parts 9 are evenly provided on the outer wall of the sleeve 4. Receiving grooves 10 are provided on the reinforcing parts 9. One end of each support plate 5 is respectively hinged in a different receiving groove 10. When not in use, the support plate 5 can be rotated into the receiving groove 10, thereby reducing the space occupied. When in use, the support plate 5 overlaps the abutment plate 7 at the end of the sleeve 4. The abutment plate 7 restricts the rotation angle of the support plate 5, so that the angle between the support plate 5 and the axis of the sleeve 4 can only be maintained between 0 and 90°.
[0030] Reference Figure 1 , Figure 2 and Figure 4 A limiting plate 11 is hinged to the end of the support plate 5 away from the sleeve 4. A torsion spring 12 is also provided on the hinge shaft between the limiting plate 11 and the support plate 5, which allows the limiting plate 11 to remain perpendicular to the support plate 5. The limiting plate 11 includes a limiting part 13 and an abutting part 14. The limiting part 13 is located above the support plate 5, while the abutting part 14 is located below the support plate 5. When the support plate 5 is in use, the limiting part 13 plays a limiting role on the wire placed on the support plate 5, so that the wire will not come off the support plate 5 due to being too loose. The height of the end of the abutting part 14 away from the limiting part 13 is flush with the height of the end of the support plate 5 away from the sleeve 4. This means that when the sleeve 4 is taken out separately from the support rod 2 and the abutting plate 7 abuts against the ground, the abutting part 14 also abuts against the ground, thereby increasing the stability of the sleeve 4 when it is placed on the ground.
[0031] Reference Figure 2 and Figure 3 When the support plate 5 is not needed, the limiting plate 11 can be rotated to change the state of the limiting plate 11 from being perpendicular to the support plate 5 to being parallel to the support plate 5. A through hole 15 is also provided on the abutment part 14. When the limiting plate 11 is parallel to the support plate 5, a connector 16 is inserted into the through hole 15. The connector 16 is a bolt. After the connector 16 passes through the through hole 15, it is connected to the support plate 5 by means of threaded engagement, so that the limiting plate 11 will not be reset under the action of the torsion spring 12.
[0032] On the side of the abutment plate 7 away from the sleeve 4, there is a plug groove 8 for the hoisting part 6 to be inserted. The insertion fit between the hoisting part 6 and the plug groove 8 is a gap insertion fit. This allows two adjacent sleeves 4 to be connected on the support rod 2 by the plug fit even if they are not alternately set with the wire laying assembly 17. They can still rotate on the support rod 2 around the axis of the support rod 2.
[0033] Reference Figure 5 and Figure 6 In order to allow the sleeve 4 closest to the base 1 to rotate freely on the support rod 2, multiple rotating parts 31 are provided on the base 1. The multiple rotating parts 31 are evenly arranged. The rotating parts 31 include rolling balls 32 and connecting posts 33. The rolling balls 32 are installed at one end of the connecting posts 33 by ball joint, and the other end of the connecting posts 33 is installed on the base 1 by plug-in. The rolling balls 32 abut against the bottom surface of the abutment plate 7 on the sleeve 4. This allows the rolling balls 32 to both support the abutment plate 7 and assist it in rotating together with the sleeve 4.
[0034] Reference Figure 2 , Figure 5 and Figure 6 To facilitate the movement of the sleeve 4, a connecting block 27 is provided on the side of the support plate 5 that can overlap with the abutment plate 7. Two parallel connecting plates 28 are fixedly connected on the outer wall of the abutment plate 7 at the position corresponding to the connecting block 27. A slot 29 is formed between the two parallel connecting plates 28 for the connecting block 27 to be inserted. When the angle between the axis of the support plate 5 and the sleeve 4 is 90°, the connecting block 27 is in the slot 29. At this time, a locking member 30 is provided on the connecting plate 28. The locking member 30 consists of a matching bolt and a nut. After the bolt passes through the two connecting plates 28 and the connecting block 27 located between the two connecting plates 28, it is connected to the nut by a threaded engagement, thereby restricting the rotation of the support plate 5. This allows the sleeve 4 to be moved not only by the lifting and hoisting part 6, but also by the forklift being able to insert into the gap between the support plate 5 and the ground to move the sleeve 4.
[0035] Reference Figure 1 and Figure 7The cable-laying assembly 17 includes a collar 18, a telescopic connecting rod 19, and a cable-laying plate 20. The collar 18 and the sleeve 4 are alternately fitted onto the support rod 2, and both can rotate around the axis of the support rod 2. One end of the collar 18 can be inserted into the insertion slot 8 on the abutment plate 7, while the other end of the collar 18 can be inserted into the lifting part 6 on another sleeve 4. One end of the telescopic connecting rod 19 is connected to the outer wall of the collar 18, and the axis of the telescopic connecting rod 19 is perpendicular to the axis of the collar 18. The wire feeding plate 20 is vertically connected to the other end of the telescopic connecting rod 19. The wire feeding plate 20 is provided with a wire threading groove 21. The wire threading groove 21 contains a connecting rod 22 and a rod sleeve 23. The rod sleeve 23 is fitted onto the connecting rod 22 and can rotate around the axis of the connecting rod 22. The axis of the connecting rod 22 is parallel to the axis of the support rod 2. When wire is needed, the wire end is passed through the wire threading groove 21. The outer wall of the wire abuts against the outer wall of the rod sleeve 23. As the wire is pulled out, the rod sleeve 23 rotates around the axis of the connecting rod 22.
[0036] The telescopic connecting rod 19 includes a first telescopic rod 24, a second telescopic rod 25, and a spring 26. One end of the first telescopic rod 24 is connected to the outer wall of the collar 18, while the other end of the first telescopic rod 24 is sleeved on the second telescopic rod 25. The spring 26 is located inside the first telescopic rod 24 and is connected to the end of the second telescopic rod 25 located inside the first telescopic rod 24. The end of the second telescopic rod 25 away from the first telescopic rod 24 is connected to the cable release plate 20.
[0037] When the wire needs to be used, first drive the limiting plate 11 so that the limiting plate 11 changes from a state perpendicular to the support plate 5 to a state parallel to the support plate 5, and fix it by the connector 16. At this time, the wire release plate 20 plays a limiting role on the wire on the support plate 5, and the spring 26 in the telescopic rod 24 is in a stretched state, which makes the wire release plate 20 always in contact with the wire on the support plate 5. Then, the wire end can be pulled out from the wire groove 21 to use the wire.
[0038] The implementation principle of this application embodiment is as follows: when only wires are stored, each wire is first placed on the support plate 5 of a different storage unit 3 on the same support rod 2. At this time, the limiting plate 11 and the support plate 5 are kept perpendicular to each other, and the limiting plate 11 plays a role in limiting the wires.
[0039] When the wire is needed, rotate the limiting plate 11 on the support plate 5 so that the limiting plate 11 and the support plate 5 are parallel. Then, extend the length of the telescopic connecting rod 19 so that the spring 26 inside the telescopic rod 24 is in a stretched state, so that the wire release plate 20 abuts against the wire. Then, the wire end is passed out from the wire pass-through groove 21. The wire end can then be pulled to use the wire.
[0040] When the wires are not needed, the limiting plate 11 is rotated to keep the limiting plate 11 and the support plate 5 parallel. Then the support plate 5 is rotated into the receiving groove 10 on the reinforcing part 9. The support plate 5 is then fixed in the receiving groove 10 by bolts, which reduces the space occupied by the support plate 5. Subsequently, each sleeve 4 can be removed from the support rod 2 and stored separately, further improving the space utilization rate.
[0041] The above are all preferred embodiments 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 wire storage device, characterized in that: The system includes a base (1), a support rod (2), and multiple storage units (3). The support rod (2) is vertically fixed to the base (1). Each storage unit (3) includes a sleeve (4) and multiple support plates (5). The multiple support plates (5) are respectively hinged to the outer wall of the sleeve (4) and distributed circumferentially on the sleeve (4). The end of each support plate (5) away from the sleeve (4) can be connected to the outer wall of the sleeve (4). An abutment plate (7) limits the rotation angle of the support plate (5). One end of the sleeve (4) is provided with an abutment plate (7), and the other end of the sleeve (4) is provided with a lifting part (6). The side of the abutment plate (7) away from the sleeve (4) is provided with an insertion groove (8). The lifting parts (6) on two adjacent sleeves (4) are connected to the insertion groove (8) by insertion. The sleeves (4) are connected in a manner such that each sleeve (4) can rotate around the axis of the support rod (2) on the support rod (2), and each support plate (5) can be connected to the outer wall of the sleeve (4) after rotation; the outer wall of the sleeve (4) is provided with a reinforcing part (9) corresponding to the position of the support plate (5), the support plate (5) is hinged to the reinforcing part (9), the side of the support plate (5) away from the reinforcing part (9) is hinged to a limiting plate (11), the limiting plate (11) is perpendicular to the support plate (5), a torsion spring (12) is provided at the hinge of the support plate (5) and the limiting plate (11), the limiting plate (11) is provided with a through hole (15), a connector (16) is provided in the through hole (15), and the connector (16) can be connected to the support plate (5) by means of thread engagement after passing through the through hole (15); The support rod (2) is also provided with a number of wire-laying assemblies (17) corresponding to the number of sleeves (4). Each wire-laying assembly (17) includes a collar (18), a telescopic connecting rod (19), and a wire-laying plate (20). Each collar (18) and each sleeve (4) are alternately sleeved on the support rod (2). One end of the collar (18) can be inserted into the hoisting part (6), and the other end of the collar (18) can be inserted into the insertion groove (8). The telescopic connecting rod (19) is connected at one end to the outer wall of the collar (18) and at the other end to the wire feeding plate (20). The wire feeding plate (20) is parallel to the support rod (2) and has a wire feeding groove (21). A connecting rod (22) and a rod sleeve (23) are provided in the wire feeding groove (21). The two ends of the connecting rod (22) are respectively connected to the side of the wire feeding groove (21). The connecting rod (22) is perpendicular to the support plate (5). The rod sleeve (23) is fitted on the connecting rod (22) and can rotate around the axis of the connecting rod (22). The telescopic connecting rod (19) includes a first telescopic rod (24), a second telescopic rod (25), and a spring (26). One end of the first telescopic rod (24) is connected to the outer wall of the collar (18). The other end of the first telescopic rod (24) is fitted on the second telescopic rod (25). The spring (26) is located inside the first telescopic rod (24) and connected to the second telescopic rod (25). The end of the second telescopic rod (25) away from the first telescopic rod (24) is perpendicularly connected to the wire feeding plate (20). The second telescopic rod (25) and the first telescopic rod (24) are in sliding fit. The spring (26) inside the first telescopic rod (24) is in a stretched state, so that the wire feeding plate (20) abuts against the wire on the support plate (5).
2. The wire storage device according to claim 1, characterized in that: The reinforcing part (9) has a receiving groove (10) on the side away from the sleeve (4), and the receiving groove (10) is used to receive the support plate (5).
3. The wire storage device according to claim 1, characterized in that: The limiting plate (11) includes a limiting part (13) and an abutting part (14) that are fixedly connected. The limiting part (13) is located on the side of the supporting plate (5) near the hoisting part (6). The abutting part (14) is located on the side of the supporting plate (5) near the abutting plate (7). The end face of the abutting part (14) and the end face of the abutting plate (7) away from the supporting plate (5) are at the same height. The through hole (15) is located on the abutting part (14).
4. The wire storage device according to claim 1, characterized in that: The support plate (5) has a connecting block (27) on the side near the abutment plate (7). The abutment plate (7) has two parallel connecting plates (28) on the side corresponding to the connecting block (27). A slot (29) is formed between the two connecting plates (28) for the connecting block (27) to be inserted. When the connecting block (27) is in the slot (29), a locking member (30) is provided on the connecting plate (28). The locking member (30) is used to restrict the rotation of the support plate (5) around the hinge axis.
5. A wire storage device according to claim 3, characterized in that: Rotating components (31) are evenly arranged on the base (1) corresponding to the positions of the abutment part (14) and the limiting plate (11). The rotating component (31) includes a rolling ball (32) and a connecting post (33). The rolling ball (32) is spherically hinged in the connecting post (33). The rolling ball (32) can abut against the abutment part (14) and the abutment plate (7). The end of the connecting post (33) away from the rolling ball (32) is vertically inserted into the base (1).
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