A tool for removing rusted railway nuts

Abstract

The utility model discloses a kind of for railway rusted nut's dismounting tool, tool includes limiting main body, guiding unit is equipped on it, guiding unit is communicated with the inside of limiting main body;Adjusting device, it is installed in the one end of guiding unit away from limiting main body, and with guiding unit axial coincidence;Dismounting cutter head, slidingly connected in guiding unit, its end and adjusting device are connected, under the drive of adjusting device, dismounting cutter head is close to or away from limiting main body;Among them, dismounting cutter head has dismounting part and shearing part, dismounting part and shearing part are integrated structure.Due to dismounting part and shearing part are integrated structure, can be according to operation requirement using dismounting part to rusted nut is clamped and positioned while, realize dismounting function, using shearing part realizes the function of shearing and cutting off to rusted nut, need not to change hand or change tool.

Description

Technical Field

[0001] This utility model belongs to the technical field of track maintenance equipment, specifically relating to a tool for disassembling rusted nuts on railway tracks. Background Technology

[0002] During railway operation, railway lines often fall into disrepair over the years, making it difficult to ensure regular oiling and maintenance of the fastener nuts. This leaves the railway fastener nuts in a harsh environment of high humidity, high salt, and frequent vibration and impact. Under such conditions, the nuts are prone to various problems, such as being rusted and seized, making them difficult to turn, being pulled apart due to overload, and being damaged by external impacts or collisions. Once the nuts are in such a state, disassembling them becomes extremely difficult.

[0003] Currently, CN213498858U discloses a socket tool for disassembling rusted nuts on railway tracks, addressing the issue of disassembling such nuts. This tool includes an adapter, a socket, and an adjusting bolt. While retaining the original socket's function, the addition of an adjusting bolt enables face-to-face contact fixing and disassembly of the nut or bolt, effectively preventing the rounding of nut edges due to excessive force. Furthermore, the adapter design allows for compatibility with both electric and conventional wrenches, facilitating use in various work scenarios. This socket tool is also suitable for disassembling nuts or bolts of different diameters.

[0004] However, the socket tool in the aforementioned patent has certain limitations. Although it can adapt to the disassembly needs of nuts of different diameters, its function is relatively simple, only capable of disassembling nuts. When the nut is severely damaged and conventional disassembly methods are ineffective, requiring it to be cut off, this tool cannot meet the needs; that is, it cannot simultaneously perform both clamping and positioning and shearing functions. This reduces the tool's usability in practical applications to some extent, and it cannot comprehensively and effectively solve the problem of handling rusted railway nuts under various complex damage conditions. Utility Model Content

[0005] The purpose of this utility model is to provide a tool for disassembling rusted railway nuts, in order to solve the technical defect in the prior art that the sleeve tool for rusted railway nuts cannot simultaneously achieve the two functions of clamping and positioning and cutting.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A tool for removing rusted nuts from railway tracks, comprising: A limiting body is provided with a guide unit, the guide unit being in communication with the interior of the limiting body; An adjustment device is installed at the end of the guide unit away from the limiting body and is axially aligned with the guide unit; The disassembly cutter head is slidably connected to the guide unit, and its end is connected to the adjustment device. Under the drive of the adjustment device, the disassembly cutter head moves closer to or further away from the limiting body. The disassembly cutter head has a disassembly part and a shearing part, which are integrally formed.

[0007] Furthermore, the limiting body is a ring-shaped structure, and a limiting hole is provided on the limiting body, which is adapted to the rusted nut; The limiting body has an opening on one side, and the guide unit is disposed in the opening; wherein, the guide unit has grooves on opposite sides. A slider is slidably connected in the groove, and two sliders are connected by a bracket. The disassembly part and the shearing part are rotatably connected to the bracket.

[0008] Furthermore, the disassembly section and the shearing section are connected by a support rod; The bracket is rotatably connected to a rotating shaft, and the support rod is sleeved on the outside of the rotating shaft and is perpendicular to the axis of the limiting hole.

[0009] Furthermore, the disassembly part is a clamp, which has an open end and a closed end structure; The chuck has anti-slip teeth on its open end.

[0010] Furthermore, the shearing part is a cutting head, and the cutting head has a triangular structure.

[0011] Furthermore, the guide unit has a ring-shaped structure with threaded grooves on its outer side; The regulating device includes: The sleeve rod has a hollow structure and is screwed onto the threaded groove, communicating with the guide unit; An adjusting rod is screwed into the sleeve rod, with one end connected to the disassembly cutter head and the other end extending out of the sleeve rod and equipped with a rocker arm.

[0012] Furthermore, the guide unit is provided with a fixing seat, and a spring is provided inside the fixing seat; The end of the spring is connected to a limit rod, and a control rod is provided on the outside of the limit rod, the control rod being perpendicular to the axis of the limit rod; A limiting groove is provided on the outer side of the sleeve rod, and the limiting rod is adapted to the limiting groove.

[0013] Furthermore, a threaded hole is provided at the bottom of the sleeve rod, and the end of the adjusting rod connected to the rocker arm is screwed into the threaded hole.

[0014] Furthermore, a first silicone sleeve is provided on the outer side of the sleeve rod, and multiple anti-slip particles are arranged around the outer circumference of the first silicone sleeve.

[0015] Furthermore, a second silicone sleeve is provided on the outer side of the rocker arm, and anti-slip strips are arranged on the outer circumference of the second silicone sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The guide unit on the limiting body is connected to the inside of the limiting body, providing a precise track for the sliding of the disassembly cutter head. This ensures that the disassembly cutter head will not deviate during movement and can stably approach or move away from the limiting body in a predetermined direction. This guarantees the accuracy of operation when disassembling and shearing nuts, improves work efficiency, and reduces operational errors and repetitive work caused by cutter head deviation. Secondly, since the disassembly part and the shearing part are an integrated structure, the disassembly part can be used to clamp and position the rusted nut while performing the disassembly function, and the shearing part can be used to cut and remove the rusted nut, thus solving the defects of the existing technology.

[0017] 2. The limiting body is a ring structure and has a limiting hole that matches the rusted nut. It can be accurately fitted onto the rusted nut through the limiting hole to achieve quick positioning and stable fixation of the nut. When the disassembly cutter head moves through the slide groove 3, it can switch between the disassembly part and the shearing part by rotation.

[0018] 3. The support rod is sleeved on the outside of the rotating shaft on the bracket, and the rotating shaft provides a stable rotation center for the support rod and the disassembly cutter head.

[0019] 4. The anti-slip teeth can penetrate deep into the rust layer and tiny bumps on the surface of the nut, greatly increasing the friction between the collet and the nut.

[0020] 5. During the shearing process, the cutter head will be subjected to the reaction force from the nut. The triangular structure can evenly distribute these forces, avoiding deformation or damage to the cutter head due to excessive local stress.

[0021] 6. The annular guide ensures that the disassembly head always moves along the predetermined axis, avoiding disassembly difficulties or unnecessary damage to the nut and surrounding components due to directional deviation.

[0022] 7. A control rod perpendicular to its own axis is provided on the outside of the limit rod. The operator can control the extension and retraction of the limit rod by operating the control rod. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A three-dimensional schematic diagram of a tool for disassembling rusted nuts on railways provided by this utility model; Figure 2 A cross-sectional schematic diagram of a tool for disassembling rusted nuts on railways provided by this utility model; Figure 3 A schematic diagram of the disassembly cutter head in a tool for disassembling rusted nuts on railways provided by this utility model; Figure 4 A schematic diagram of the installation of a limiting rod in a tool for dismantling rusted nuts on railways provided by this utility model; Figure 5 A schematic diagram of an adjustment device in a tool for disassembling rusted nuts on railways provided by this utility model; The components are: 1. collar; 2. connector; 3. slide groove; 4. slider; 5. bracket; 6. pivot; 7. support rod; 8. clamp; 9. cut head; 10. anti-slip teeth; 11. threaded groove; 12. sleeve rod; 13. first silicone sleeve; 14. anti-slip particles; 15. fixed seat; 16. limit rod; 17. limit groove; 18. spring; 19. control rod; 20. adjusting rod; 21. slot; 22. block; 23. rocker arm; 24. second silicone sleeve; 25. anti-slip strip. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] To address the technical deficiencies mentioned in the background section, this embodiment provides a tool for disassembling rusted nuts on railway tracks. The following is a further detailed description of this utility model with reference to the accompanying drawings: like Figures 1-5 As shown, the disassembly tool includes a limiting body with a guide unit on it, the guide unit being internally connected to the limiting body; an adjustment device installed at the end of the guide unit away from the limiting body and axially aligned with the guide unit; and a disassembly cutter head slidably connected in the guide unit, its end being connected to the adjustment device. Driven by the adjustment device, the disassembly cutter head moves closer to or away from the limiting body. The disassembly cutter head has a disassembly section and a shearing section, which are integrally formed.

[0032] In the above structure, the guide unit on the limiting body is connected to the inside of the limiting body, providing a precise track for the sliding of the disassembly cutter head. This ensures that the disassembly cutter head will not deviate during the movement and can stably approach or move away from the limiting body in a predetermined direction. This ensures the accuracy of operation when disassembling and cutting nuts, improves work efficiency, and reduces operational errors and repetitive work caused by cutter head deviation.

[0033] The adjustment device is installed at the end of the guide unit away from the limiting body and is axially aligned with the guide unit. This allows the adjustment device to directly and effectively transmit the driving force to the disassembly cutter head, driving it to slide within the guide unit. The disassembly cutter head has a disassembly section and a shearing section, which are integrated into one unit. The disassembly section can be used for conventional disassembly operations on rusted nuts, attempting to unscrew them from bolts by rotation or other means. The shearing section, on the other hand, is designed for severely damaged nuts that cannot be removed by conventional methods, allowing it to be directly sheared off. This enables the tool to handle various complex problems encountered with railway nuts in harsh environments, eliminating the need to carry multiple tools with different functions, reducing the workload of operators, and improving on-site work efficiency. Furthermore, the disassembly section and the shearing section can work together when dealing with nuts in different situations. For example, the disassembly section can be used first to attempt disassembly, and if disassembly is difficult, the shearing section can be used to cut off the nuts. The two functions complement each other, greatly improving the ability and efficiency of solving the problem of rusted railway nuts.

[0034] like Figure 1 and Figure 2 As shown, the limiting body is a ring-shaped structure with a limiting hole. The limiting hole is adapted to the rusted nut, which can accurately fit the tool onto the rusted nut, thereby achieving rapid positioning and stable fixation of the nut.

[0035] A movable opening is provided on one side of the limiting body, and a guide unit is disposed within the movable opening. The guide unit has grooves 3 on opposite sides, with sliders 4 slidably connected within the grooves 3. Two sliders 4 are connected by a bracket 5. The disassembly and shearing parts are rotatably connected to the bracket 5. The grooves 3 restrict the movement direction of the sliders 4, ensuring they slide only along a predetermined track, thus guaranteeing the movement accuracy of the disassembly cutter head when approaching or moving away from the limiting body. The bracket 5 also distributes the force on the disassembly cutter head during operation across both sliders 4, reducing force concentration on a single slider 4 and extending the tool's service life. Specifically, the disassembly part and the shearing part are rotatably connected to the bracket 5, and the disassembly part and the shearing part are connected by a support rod 7. A rotating shaft 6 is rotatably connected to the bracket 5, and the support rod 7 is sleeved on the outside of the rotating shaft 6 and is perpendicular to the axis of the limiting hole. The disassembly part is a chuck 8, which is an open-end and closed-end structure, and the open end of the chuck 8 is provided with anti-slip teeth 10. The shearing part is a cutter 9, which is a triangular structure.

[0036] In implementation, the limiting body is a collar 1, and the limiting hole is a hexagonal inner hole, allowing the disassembly tool to be directly fitted onto the rusted nut using the collar 1. The guiding unit is a connector 2, which is integrally welded to the collar 1 to form a support frame that will not separate under stress and has high overall rigidity. Then, a sliding groove 3 is opened in the connector 2. The sliding groove 3, the slider 4, and the bracket 5 work together to provide a sliding track and rotation space for the disassembly tool head. Because the sliding groove 3 guides and limits the movement of the slider 4, it prevents deviation and ensures that the bracket 5 always moves in a straight line along the axial direction. The support rod 7 can be rotated under the action of the pivot 6 without tilting. One end is the chuck 8 and the other end is the cutter 9. When the rusted nut can be restored, the chuck 8 is used with the anti-slip teeth 10 to unscrew it with low torque. When the rusted nut is completely rusted, the rotation switches to the cutter 9 to cut the rusted nut and complete the destructive removal. The rotation can switch between the clamping and loosening and radial cutting modes with one rotation, without the need to change hands or tools. After the rotation is in place, the chuck 8 and the cutter 9 are in contact with the nut, and there will be no shaking during operation, ensuring the stability of cutting or clamping.

[0037] In this embodiment, the outer surface of the chuck 8 is fixedly connected with anti-slip teeth 10, and the main body of the cutter 9 is made of cobalt-containing high-speed steel or chromium vanadium steel. The outer surfaces of both the chuck 8 and the cutter 9 are coated with TiN.

[0038] In practical use, multiple anti-slip teeth 10 can bite into the rust layer of the rusted nut, and the torque is instantly transmitted to the nut body, avoiding the "slipping" of traditional wrenches and damage to the hexagonal edges. The anti-slip teeth 10 are wear-resistant after high-frequency quenching and are not easily dulled even after repeated clamping. The main body of the cutting head 9 is made of cobalt-containing high-speed steel or chromium vanadium steel, which maintains high hardness under impact and is not easy to roll or chip. The whole part is vacuum quenched and the outer surface is coated with a TiN coating to reduce friction, reduce chip adhesion, and at the same time play a role in rust prevention.

[0039] Furthermore, the connector 2 has an annular structure with a threaded groove 11 on its outer side; the adjustment device includes a sleeve rod 12, which is a hollow structure and is screwed onto the threaded groove 11, communicating with the guide unit; the adjustment rod 20 is screwed into the sleeve rod 12, with one end connected to the disassembly cutter head and the other end extending to the outside of the sleeve rod 12 and equipped with a rocker arm 23; wherein, the connector 2 is equipped with a fixing seat 15, and a spring 18 is provided inside the fixing seat 15. The end of the spring 18 is connected to a limit rod 16, and a control rod 19 is provided on the outside of the limit rod 16. The control rod 19 is axially perpendicular to the limit rod 16, and a limit groove 17 is opened on the outside of the sleeve rod 12, and the limit rod 16 is adapted to the limit groove 17.

[0040] The bottom of the sleeve rod 12 is provided with a threaded hole. The end of the adjusting rod 20 connected to the rocker arm 23 is screwed into the threaded hole. The outer side of the sleeve rod 12 is provided with a first silicone sleeve 13. Multiple anti-slip particles 14 are arranged around the outer circumference of the first silicone sleeve 13. The outer side of the rocker arm 23 is provided with a second silicone sleeve 24. Anti-slip strips 25 are arranged around the outer circumference of the second silicone sleeve 24.

[0041] In practical use, the connector 2 is connected to the sleeve rod 12 through the threaded groove 11, making it easier to install and remove the collar 1 without the need for an auxiliary wrench; the exposed part of the sleeve rod 12 is covered with the first silicone sleeve 13. The silicone is soft and will not be cold to the touch in winter, increasing the comfort of use. In addition, the silicone is insulated, providing basic safety protection in case of accidental contact with the live track. Multiple anti-slip particles 14 increase palm friction, so it will not slip even when the palm is sweaty or when wearing oily gloves.

[0042] The front of the connector 2 is fixedly connected to a fixing seat 15. The inside of the fixing seat 15 is slidably connected to a limit rod 16. A limit groove 17 is opened on the outer surface of the sleeve rod 12 near the limit rod 16. In actual use, the fixing seat 15 is welded to the front of the connector 2. After the sleeve rod 12 is connected to the connector 2, the limit rod 16 is snapped into the inside of the limit groove 17, forming a mechanical double insurance. Even if the thread is loose, it will not fall off, ensuring the firmness of the installation.

[0043] A spring 18 is fixedly connected to one side of the inner side of the fixed base 15. The spring 18 is fixedly connected to the limiting rod 16. A control rod 19 is fixedly connected to the outer surface of the limiting rod 16. In actual use, the limiting rod 16 is pushed by the spring 18 and can be inserted laterally into the limiting groove 17 of the sleeve rod 12 to further ensure the stability after installation. When unlocking is required, simply move the control rod 19 and pull to remove the limiting rod 16. This can be done with one hand. At the same time, the spring 18 ensures that the limiting rod 16 automatically resets for easy use next time.

[0044] The sleeve rod 12 is internally threaded with an adjusting rod 20. One end of the adjusting rod 20 has a slot 21. The outer surface of the bracket 5 is rotatably connected to a locking block 22 near the slot 21. Rotating the adjusting rod 20 applies force to the bracket 5, allowing the bracket 5 to move forward or backward, thus achieving fine adjustment of the shearing or clamping depth. The locking block 22 and the slot 21 work together to facilitate the connection between the adjusting rod 20 and the bracket 5, ensuring stability during adjustment and preventing free rotation.

[0045] A rocker arm 23 is fixedly connected to the other end of the adjusting rod 20. A second silicone sleeve 24 is fixedly connected to the outer surface of the rocker arm 23. An anti-slip strip 25 is fixedly connected to the outer surface of the second silicone sleeve 24. The rocker arm 23 is fixed to the other end of the adjusting rod 20, which makes it easy for the hand to exert force and operate the adjusting rod 20, making fine adjustment easier. The second silicone sleeve 24 prevents the hand from rubbing when the operator rotates continuously. The anti-slip strip 25 is aligned with the direction of the fingers and does not slip when pushing, pulling or rotating.

[0046] In use, the sleeve rod 12 is first screwed onto the connector 2 through the threaded groove 11, achieving the initial connection between the collar 1 and the sleeve rod 12. After the sleeve rod 12 is tightened, the limiting rod 16, under the elastic force of the spring 18, automatically inserts laterally into the limiting groove 17 on the sleeve rod 12, forming a mechanical double safety. The hexagonal hole inside the collar 1 directly fits the railway nut, and the outer wall is welded to the connector 2 to form a rigid frame. The rocker arm 23 drives the adjusting rod 20 to rotate, causing the slider 4 to drive the bracket 5 vertically within the slide groove 3. As the support rod 7 moves forward and backward, it can be rotated 180° via the pivot 6. One end, the clamp 8 with anti-slip teeth 10, bites into the rust layer and loosens the nut with low torque. The other end, the cutter 9, moves forward with the bracket 5 and cuts the rusted nut. One rotation completes the switching between clamping and cutting modes. When it is necessary to disassemble the sleeve rod 12, simply move the control rod 19. The control rod 19 drives the limit rod 16 to overcome the elastic force of the spring 18 and pull the limit rod 16 out of the limit groove 17. At this time, the sleeve rod 12 can be easily disassembled with one hand, making the operation convenient.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit its protection scope. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this utility model, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.

Claims

1. A tool for disassembling rusted nuts on railway tracks, characterized in that, include: A limiting body is provided with a guide unit, the guide unit being in communication with the interior of the limiting body; An adjustment device is installed at the end of the guide unit away from the limiting body and is axially aligned with the guide unit; The disassembly cutter head is slidably connected to the guide unit, and its end is connected to the adjustment device. Under the drive of the adjustment device, the disassembly cutter head moves closer to or further away from the limiting body. The disassembly cutter head has a disassembly part and a shearing part, which are integrally formed.

2. The tool for dismantling rusted nuts on railways according to claim 1, characterized in that, The limiting body is a ring structure, and a limiting hole is provided on the limiting body. The limiting hole is adapted to the rusted nut. The limiting body has an opening on one side, and the guide unit is disposed in the opening; wherein, the guide unit has grooves on opposite sides. A slider is slidably connected in the groove, and two sliders are connected by a bracket. The disassembly part and the shearing part are rotatably connected to the bracket.

3. The tool for disassembling rusted nuts on railways according to claim 2, characterized in that, The disassembly section and the shearing section are connected by a support rod; The bracket is rotatably connected to a rotating shaft, and the support rod is sleeved on the outside of the rotating shaft and is perpendicular to the axis of the limiting hole.

4. The tool for disassembling rusted nuts on railways according to claim 3, characterized in that, The disassembly part is a clamp, which has an open end and a closed end structure. The chuck has anti-slip teeth on its open end.

5. A tool for disassembling rusted nuts on railways according to claim 3, characterized in that, The shearing part is a cutting head, and the cutting head has a triangular structure.

6. A tool for dismantling rusted nuts on railways according to claim 1, characterized in that, The guide unit is a ring-shaped structure with threaded grooves on its outer side; The regulating device includes: The sleeve rod has a hollow structure and is screwed onto the threaded groove, communicating with the guide unit; An adjusting rod is screwed into the sleeve rod, with one end connected to the disassembly cutter head and the other end extending out of the sleeve rod and equipped with a rocker arm.

7. A tool for dismantling rusted nuts on railways according to claim 6, characterized in that, The guide unit is provided with a fixed seat, and a spring is provided inside the fixed seat; The end of the spring is connected to a limit rod, and a control rod is provided on the outside of the limit rod, the control rod being perpendicular to the axis of the limit rod; A limiting groove is provided on the outer side of the sleeve rod, and the limiting rod is adapted to the limiting groove.

8. A tool for dismantling rusted nuts on railways according to claim 6, characterized in that, The bottom of the sleeve rod has a threaded hole, and the end of the adjusting rod connected to the rocker arm is screwed into the threaded hole.

9. A tool for disassembling rusted nuts on railways according to claim 6, characterized in that, The outer side of the sleeve is provided with a first silicone sleeve, and multiple anti-slip particles are arranged around the outer circumference of the first silicone sleeve.

10. A tool for dismantling rusted nuts on railways according to claim 6, characterized in that, The rocker arm is provided with a second silicone sleeve on its outer side, and anti-slip strips are arranged around the outer circumference of the second silicone sleeve.

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