A caster with detachable structure

Abstract

This utility model relates to the field of caster technology, specifically a caster with a detachable structure. It connects the locking protrusion on the brake spring to the mounting through hole on the caster bracket using a snap-fit ​​method, eliminating the need for specialized equipment and expertise required for riveting. This simplifies the installation process. When users need to maintain or replace parts, they only need to apply external force to the locking protrusion through the mounting through hole using simple tools. The locking protrusion undergoes elastic deformation under force, allowing the user to easily remove the brake spring from the caster bracket. This effectively solves the problem that existing brake springs are often installed on the caster bracket using rivets. However, the riveting process relies on specialized equipment, is complex, and makes it difficult to remove the brake spring when repairing or replacing parts of the caster structure, increasing maintenance difficulty.

Description

Technical Field

[0001] This utility model relates to the field of caster technology, specifically a caster with a detachable structure. Background Technology

[0002] With the increasing demand for mobility in modern industry and daily life, casters are widely used in various equipment and furniture, such as handcarts, medical carts, office chairs, suitcases, and industrial machinery. By installing casters on the bottom of equipment, people can move, turn, and position objects flexibly, greatly facilitating the handling and use of goods. Casters not only improve the convenience and efficiency of operation but also enhance the comfort and adaptability of products, and have become an indispensable key component in various mobile devices.

[0003] Existing caster braking structures typically use brake springs, which lock or unlock by controlling their contact or separation from the wheel. These brake springs are often installed on the caster bracket with rivets. However, the riveting process relies on specialized equipment, the assembly process is complex, and the production cost is high. Furthermore, when it is necessary to repair or replace parts of the caster structure, the use of rivets to connect the brake springs and the caster bracket makes it difficult to disassemble the brake springs, increasing the difficulty of maintenance.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] The existing brake springs are often installed on caster brackets using rivets. However, the riveting process relies on specialized equipment, is complex, and makes it difficult to disassemble the brake springs when the caster structure needs repair or component replacement, increasing maintenance difficulty. The technical solution adopted by this utility model to solve this problem is as follows: A caster with a detachable structure includes a caster bracket for mounting the wheel body and a brake spring connected to the caster bracket and capable of elastic deformation. The caster bracket has a mounting through hole, and one side of the brake spring extends toward the mounting through hole to form an elastically deformable snap-fit ​​protrusion. The snap-fit ​​protrusion engages with the mounting through hole to achieve a detachable connection between the brake spring and the caster bracket.

[0006] Furthermore, the brake spring is provided with a drive member that can rotate relative to the caster bracket, and a preload adjustment mechanism for adjusting the brake preload. The preload adjustment mechanism includes a brake nut. When the drive member rotates relative to the caster bracket, the drive member drives the brake spring to rotate, so that the brake nut locks or unlocks the wheel.

[0007] Furthermore, the brake spring includes a support portion, one side of which bends and extends toward the mounting through hole to form the snap-fit ​​protrusion. There is a height difference between the plane where the support portion is located and the plane where the mounting through hole is located, so as to form a deformation space for the snap-fit ​​protrusion to undergo elastic deformation when the snap-fit ​​protrusion is assembled with the mounting through hole.

[0008] Furthermore, the mounting through hole includes a first mounting through hole and a second mounting through hole, and the snap-fit ​​protrusion includes a first snap-fit ​​protrusion corresponding to the first mounting through hole and a second snap-fit ​​protrusion corresponding to the second mounting through hole. A first deformation gap is formed between the first snap-fit ​​protrusion and the first mounting through hole, and a second deformation gap is formed between the second snap-fit ​​protrusion and the second mounting through hole.

[0009] Furthermore, the brake spring includes a first braking part, the preload adjustment mechanism is disposed on the first braking part, the driving member includes a driving part and a snap-fit ​​arm that is obliquely connected to the driving part, a snap-fit ​​opening is provided between the driving part and the snap-fit ​​arm, and the end of the first braking part is bent upward to form a hook part that snaps into the snap-fit ​​opening.

[0010] Furthermore, the preload adjustment mechanism includes a screwing member that can rotate relative to the first braking part and is threadedly connected to the brake nut. The caster bracket is provided with an clearance opening. The snap-fit ​​arm extends from the inside of the caster bracket outward into the clearance opening. When the brake nut unlocks the wheel, the snap-fit ​​arm blocks the clearance opening. When the brake nut locks the wheel, the snap-fit ​​arm rotates with the drive part to open the clearance opening.

[0011] Furthermore, the screwing component has a screwing groove on the side near the clearance opening, and the screwing groove is spaced apart along the circumferential direction of the screwing component.

[0012] Furthermore, the caster bracket is provided with a universal module for the caster bracket to move in a circumferential direction, and the brake spring includes a second braking part for locking or unlocking the universal module.

[0013] Furthermore, the universal module is provided with a plurality of snap-fit ​​grooves distributed circumferentially, and the second braking part is provided with a snap-fit ​​protrusion. The plurality of snap-fit ​​grooves engage with the snap-fit ​​protrusion to lock or unlock the universal module.

[0014] Furthermore, the caster bracket is provided with a connecting mechanism for connecting the universal module and the external component so that the caster bracket can rotate universally relative to the external component. The connecting mechanism includes a connecting screw rod arranged vertically and passing through the universal module, and a connecting nut assembly threadedly connected to the connecting screw rod. The connecting nut assembly includes a first connecting nut, a second connecting nut, and a third connecting nut arranged sequentially from top to bottom on the connecting screw rod. The first and second connecting nuts are used to fix the connecting screw rod to the external component, and the third connecting nut is located between the universal module and the caster bracket.

[0015] The beneficial effects of this utility model are as follows: This invention connects the snap-fit ​​protrusion on the brake spring to the mounting through hole on the caster bracket using a snap-fit ​​mechanism. This eliminates the need for specialized riveting equipment and expertise, simplifying the installation process. When users need to maintain or replace parts, they simply apply external force to the snap-fit ​​protrusion through the mounting through hole using a simple tool. The snap-fit ​​protrusion undergoes elastic deformation under pressure, allowing users to easily remove the brake spring from the caster bracket. This effectively solves the problem that existing brake springs are often installed on caster brackets using rivets. However, the riveting process relies on specialized equipment, is complex, and makes it difficult to remove the brake spring when repairing or replacing parts of the caster structure, increasing maintenance difficulty.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of the caster of this utility model; Figure 2 This is an exploded view showing the connection between the brake spring and the preload adjustment mechanism of this utility model; Figure 3 This is the second structural schematic diagram of the caster of this utility model; Figure 4 for Figure 3 Cross-sectional view along line AA; Figure 5 This is one of the exploded view diagrams of the caster of this utility model; Figure 6 This is the second exploded view of the caster of this utility model; Figure 7 This is an exploded view showing the connection between the brake spring and the drive component of this utility model; Figure 8 This is the third structural schematic diagram of the caster of this utility model; Figure 9 for Figure 8 Cross-sectional view along line BB; Figure 10 This is the fourth structural schematic diagram of the caster of this utility model. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1 to 10 The caster shown includes a caster bracket 1 for mounting the wheel body and a brake spring 2 connected to the caster bracket 1 and capable of elastic deformation. The caster bracket 1 has a mounting through hole 11. One side of the brake spring 2 extends toward the mounting through hole 11 to form an elastically deformable snap-fit ​​protrusion 20. The snap-fit ​​protrusion 20 engages with the mounting through hole 11 to achieve a detachable connection between the brake spring 2 and the caster bracket 1. This invention connects the snap-fit ​​protrusion on the brake spring to the mounting through hole on the caster bracket using a snap-fit ​​mechanism. This eliminates the need for specialized riveting equipment and expertise, simplifying the installation process. When users need to maintain or replace parts, they simply apply external force to the snap-fit ​​protrusion through the mounting through hole using a simple tool. The snap-fit ​​protrusion undergoes elastic deformation under pressure, allowing users to easily remove the brake spring from the caster bracket. This effectively solves the problem that existing brake springs are often installed on caster brackets using rivets. However, the riveting process relies on specialized equipment, is complex, and makes it difficult to remove the brake spring when repairing or replacing parts of the caster structure, increasing maintenance difficulty.

[0020] Specifically, during assembly, the user aligns the snap-fit ​​protrusion 20 of the brake spring 2 with the mounting through hole 11 on the caster bracket 1 and applies pressure, causing the snap-fit ​​protrusion 20 to elastically deform during insertion and smoothly enter the mounting through hole 11. Subsequently, it recovers its elastic deformation and locks in place, achieving a firm connection between the brake spring 2 and the caster bracket 1. When disassembly is required, the user can use a simple tool to press the snap-fit ​​protrusion 20 from the outside of the caster bracket 1 through the mounting through hole 11, causing the snap-fit ​​protrusion 20 to elastically deform again and move away from the mounting through hole 11, thereby completing quick disassembly. This method helps to eliminate the riveting equipment and processes required for traditional riveting connections, reduces production costs, and effectively improves assembly efficiency.

[0021] Furthermore, the shapes of the snap-fit ​​protrusion 20 and the mounting through hole 11 are adapted to each other; optionally, the mounting through hole 11 is a circular hole, and the snap-fit ​​protrusion 20 is generally circular or has an annular buckle at the end, such as a spherical or drum-shaped protrusion. During assembly, the snap-fit ​​protrusion 20 is deformed by pressure, enters the mounting through hole 11, and then the buckle springs back, thereby forming a lock.

[0022] like Figures 1 to 10 The brake spring 2 shown is provided with a drive member 3 that can rotate relative to the caster bracket 1, and a preload adjustment mechanism 4 for adjusting the brake preload. The preload adjustment mechanism 4 includes a brake nut 41. When the drive member 3 rotates relative to the caster bracket 1, the drive member 3 drives the brake spring 2 to rotate, so that the brake nut 41 locks or unlocks the wheel. Furthermore, the drive component 3 can rotate relative to the caster bracket 1 and can directly drive the brake spring 2 to move. Users can easily lock and unlock the wheel by simply moving the drive component 3 without complicated operation steps, which greatly simplifies the braking state switching process and helps to improve the operation efficiency and experience in daily use.

[0023] Furthermore, the brake nut 41 in the preload adjustment mechanism can flexibly adjust the brake preload according to the actual load weight of the caster and the different requirements for braking stability in the usage scenario. This not only avoids brake failure caused by insufficient preload, but also prevents operational difficulties or component wear caused by excessive preload.

[0024] Furthermore, integrating the drive component 3, brake spring 2, and preload adjustment mechanism 4 into a relatively compact space is beneficial for optimizing the overall structure of the caster and helps reduce the space occupied by the components.

[0025] Optionally, in some embodiments, the preload adjustment mechanism 4 includes an eccentric wheel and an adjustment knob. The eccentric wheel is fixed to the end of the brake spring, and the adjustment knob drives the eccentric wheel to rotate. The outer edge of the eccentric wheel contacts the side of the wheel body. By rotating, the eccentricity is changed, thereby adjusting the pressure applied to the wheel body.

[0026] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the preload adjustment mechanism 4 includes a screwing member 42 mounted on the brake spring 2 and rotatable relative to the brake spring 2, and a brake nut 41 threadedly connected to the screwing member 42. The end face of the brake nut 41 is close to the wheel body. When the screwing member 42 is rotated, the brake nut 41 moves closer to or away from the wheel body under the action of the threaded connection, thereby changing the initial gap with the wheel body to adjust the preload when the brake spring 2 locks the wheel body.

[0027] like Figures 1 to 10 The brake spring 2 shown includes a support portion 21. One side of the support portion 21 bends and extends toward the mounting through hole 11 to form the snap-fit ​​protrusion 20. There is a height difference between the plane where the support portion 21 is located and the plane where the mounting through hole 11 is located, so as to form a deformation space for the snap-fit ​​protrusion 20 to undergo elastic deformation when the snap-fit ​​protrusion 20 is assembled with the mounting through hole 11. Furthermore, the height difference between the support portion 21 and the plane containing the mounting through hole 11 provides a clear deformation space for the snap-fit ​​protrusion 20. During assembly, the snap-fit ​​protrusion 20 can naturally undergo elastic deformation along the height difference direction, avoiding deformation obstruction due to space limitations. This ensures that the snap-fit ​​protrusion 20 can smoothly engage with the mounting through hole 11, reducing the risk of assembly jamming or component damage. During disassembly, the snap-fit ​​protrusion 20 can also fully deform within the deformation space under external force to detach from the mounting through hole 11, further improving the smoothness of assembly and disassembly.

[0028] Furthermore, the height difference is set so that the snap-fit ​​protrusion 20 can begin to pre-deform before entering the mounting through hole 11, thereby achieving a smooth process of guiding, deformation, and snapping in. This helps to reduce assembly force, improve the stability and consistency of the connection, and effectively achieve a fast and repeatable installation operation.

[0029] Furthermore, if the plane where the support part 21 is located is the same as the plane where the mounting through hole 11 is located, the snap-fit ​​between the snap-fit ​​protrusion 20 and the mounting through hole 11 is in a straight line, which cannot form a deformation space. At the same time, it is not conducive to the user disassembling the brake spring 2.

[0030] like Figures 1 to 10 The mounting through hole 11 shown includes a first mounting through hole 111 and a second mounting through hole 112. The snap-fit ​​protrusion 20 includes a first snap-fit ​​protrusion 201 corresponding to the first mounting through hole 111 and a second snap-fit ​​protrusion 202 corresponding to the second mounting through hole 112. A first deformation gap 2011 is formed between the first snap-fit ​​protrusion 201 and the first mounting through hole 111, and a second deformation gap 2021 is formed between the second snap-fit ​​protrusion 202 and the second mounting through hole 112. Preferably, the structure of the first mounting through hole 111 is the same as that of the second mounting through hole 112, the structure of the first snap-fit ​​protrusion 201 is the same as that of the second snap-fit ​​protrusion 202, and the assembly method of the first snap-fit ​​protrusion 201 and the first mounting through hole 111 is also the same as that of the second snap-fit ​​protrusion 202 and the second mounting through hole 112.

[0031] Furthermore, by setting the first mounting through hole 111 and the second mounting through hole 112 to cooperate with the corresponding first snap-fit ​​protrusion 201 and the second snap-fit ​​protrusion 202 respectively, a double-point snap-fit ​​connection structure is formed, so that the brake spring 2 is more securely installed on the caster bracket 1, effectively dispersing the force and avoiding stress concentration or off-center loosening caused by single-point connection.

[0032] Furthermore, the first deformation gap 2011 and the second deformation gap 2021 provide independent elastic deformation areas for the corresponding first snap-fit ​​protrusion 201 and second snap-fit ​​protrusion 202, respectively, to ensure that the first snap-fit ​​protrusion 201 and the second snap-fit ​​protrusion 202 can be elastically compressed or bent smoothly during assembly, avoiding mutual interference and improving assembly smoothness and reliability.

[0033] like Figures 1 to 10 The brake spring 2 shown includes a first braking part 22, the preload adjustment mechanism 4 is disposed on the first braking part 22, the driving member 3 includes a driving part 31 and a snap-fit ​​arm 32 that is obliquely connected to the driving part 31, a snap-fit ​​opening 33 is provided between the driving part 31 and the snap-fit ​​arm 32, and the end of the first braking part 22 bends upward to form a hook part 221 that snaps into the snap-fit ​​opening 33; Furthermore, the snap-fit ​​opening 33 of the drive component 3 and the snap-fit ​​hook portion 221 of the first brake portion 22 form a precise snap-fit ​​engagement, which helps to ensure that the drive component 3 can stably drive the brake spring 2 to move synchronously through the snap-fit ​​structure when it rotates, avoiding relative sliding or separation between the two, which helps to ensure the efficient transmission of braking commands and effectively ensures the consistency of wheel locking or unlocking actions.

[0034] Furthermore, the snap-fit ​​setting between the hook part 221 and the snap-fit ​​opening 33 does not require additional fastening components. During assembly, the connection between the drive component 3 and the brake spring 2 can be completed simply by snapping the hook part 221 into the snap-fit ​​opening 33, which helps to simplify the assembly process. At the same time, the inclined connection setting between the drive part 31 and the snap-fit ​​arm 32 can adapt to the spatial layout between the brake spring 2 and the drive component 3, avoid structural interference, and make the overall linkage structure more compact.

[0035] Furthermore, the snap-fit ​​structure of the hook portion 221 and the snap-fit ​​opening 33 can be separated after a certain external force is applied, which facilitates the disassembly of the brake spring 2 or the replacement of the drive component 3 during maintenance, thereby improving the maintainability of the caster and effectively reducing the cost of later use.

[0036] like Figures 1 to 10 The preload adjustment mechanism 4 shown includes a screwing member 42 that can rotate relative to the first braking part 22 and is threadedly connected to the brake nut 41. The caster bracket 1 is provided with a clearance opening 12. The locking arm 32 extends from the inside of the caster bracket 1 outward into the clearance opening 12. When the brake nut 41 unlocks the wheel, the locking arm 32 blocks the clearance opening 12. When the brake nut 41 locks the wheel, the locking arm 32 rotates with the drive part 31 to open the clearance opening 12. Furthermore, by changing the relative position of the locking arm 32 and the clearance opening 12, a mechanical state interlock is formed. The clearance opening 12 is only opened when the brake nut 41 locks the wheel, allowing the user to access the screw 42 to adjust the preload. In the unlocked state, the locking arm 32 blocks the clearance opening 12, physically preventing the adjustment operation and avoiding accidental adjustment in the non-braking state that could lead to safety hazards.

[0037] Furthermore, this setting helps ensure that the preload adjustment must be carried out under the premise that the wheel body is locked, so that the brake nut 41 is in a fixed state under force. Only when the rotating screw 42 is rotated can the brake nut 41 be effectively pushed to move axially to adjust the pressure. If the adjustment is carried out in the free state of the wheel body, the nut may spin freely.

[0038] Specifically, when the wheel is in the unlocked state, the locking arm 32 blocks the clearance opening 12, preventing the user from accessing the screwing component 42 inside the caster bracket 1 from the outside through the clearance opening 12, thus preventing preload adjustment. When the wheel is in the locked state, the drive unit 31 drives the locking arm 32 to rotate, causing the locking arm 32 to rotate relative to the clearance opening 12, thereby opening the clearance opening 12. At this time, the user can insert a tool from the outside of the caster bracket 1 through the clearance opening 12, act on the screwing component 42 located inside the caster bracket 1, and make it rotate. Since the brake nut 41 is in the locked state and abuts against the wheel and is in a fixed state under force, it cannot move axially. When the screwing component 42 rotates relative to the brake nut 41, the brake nut 41 will be displaced axially under the cooperation of the threaded connection, thereby changing its pressure on the wheel and realizing the adjustment of preload.

[0039] like Figures 1 to 10 The screwing component 42 shown is provided with a screwing groove 421 on the side near the clearance opening 12, and the screwing groove 421 is arranged at intervals along the circumferential direction of the screwing component 42. Furthermore, the screw grooves 421 are spaced apart along the circumference of the screw member 42, which helps to increase the friction between the hand or tool and the screw member 42, and avoid slippage during operation. This makes it easier for the user to apply force when adjusting the screw member 42 through the avoidance opening 12, especially when the caster space is limited, which helps to improve the smoothness of the adjustment operation.

[0040] Furthermore, the structure of the screw groove 421 provides a clear tool positioning guide, which helps reduce the risk of slippage, makes the adjustment process more effortless and stable, and effectively improves the comfort and accuracy of user operation.

[0041] Furthermore, the screw groove 421 can be directly formed on the screw part 42 through conventional processes such as stamping, milling or injection molding, without the need for additional assembly parts, and the cost is relatively low.

[0042] like Figures 1 to 10 The caster bracket 1 shown is provided with a universal module 5 for the caster bracket 1 to move in a circumferential direction, and the brake spring 2 includes a second braking part 23 for locking or unlocking the universal module 5; Furthermore, by setting a second braking part 23 on the brake spring 2, the brake spring 2 can not only brake the wheel body, but also lock or unlock the universal module 5, thereby realizing the "one-button dual braking" function, that is, the rolling and steering of the caster can be locked at the same time with one operation, which is beneficial to significantly improve the stability and safety of the caster.

[0043] Furthermore, by using the same brake spring 2 to achieve the dual functions of wheel braking and omnidirectional steering braking, the need to set up an additional independent steering locking mechanism is avoided, which helps to reduce the number of parts and make the overall structure more compact.

[0044] Furthermore, when the driving component 3 drives the brake spring 2 to rotate, the first braking part 22 and the second braking part 23 act synchronously, which can realize the coordinated control of wheel braking and universal locking, ensuring that the wheel can quickly enter the fully locked state when positioning is required, which is conducive to improving the operation response speed.

[0045] like Figures 1 to 10 The universal module 5 shown is provided with a plurality of snap-fit ​​grooves 51 distributed circumferentially, and the second braking part 23 is provided with a snap-fit ​​protrusion 231. The plurality of snap-fit ​​grooves 51 are engaged with the snap-fit ​​protrusion 231 so that the second braking part 23 locks or unlocks the universal module 5. Optionally, the number of snap-fit ​​protrusions 231 can be multiple.

[0046] Furthermore, multiple snap-fit ​​grooves 51 are distributed circumferentially along the universal module 5, forming a multi-point snap-fit ​​engagement with the snap-fit ​​protrusion 231 of the second braking part 23. When locked, the structure of the snap-fit ​​protrusion 231 embedded in the snap-fit ​​groove 51 restricts the circumferential rotation of the universal module. Compared with single-point contact locking, the force is more uniform, and it is not easy for the locking to fail due to vibration or external force, ensuring that the caster steering lock state is stable and reliable.

[0047] Furthermore, the mechanical engagement structure between the locking protrusion 231 and the locking groove 51 is simple and direct. When the brake spring 2 is activated, the locking protrusion 231 can quickly engage with the corresponding locking groove 51 to lock, or disengage from the locking groove 51 to unlock, without the need for a complex transmission mechanism. At the same time, the engagement between the locking groove 51 and the locking protrusion 231 has a clear "locking feel". Users can intuitively judge whether the universal module 5 has been locked in place through operation feedback, which helps to improve the certainty of operation.

[0048] like Figures 1 to 10The caster bracket 1 shown is provided with a connecting mechanism 6 for connecting the universal module 5 and an external component so that the caster bracket 1 can rotate universally relative to the external component. The connecting mechanism 6 includes a connecting screw 61 arranged vertically and passing through the universal module 5, and a connecting nut assembly 62 threadedly connected to the connecting screw 61. The connecting nut assembly 62 includes a first connecting nut 621, a second connecting nut 622 and a third connecting nut 623 arranged sequentially from top to bottom from the connecting screw 61. The first connecting nut 621 and the second connecting nut 622 are used to fix the connecting screw 61 to the external component, and the third connecting nut 623 is located between the universal module 5 and the caster bracket 1. Furthermore, by setting the first connecting nut 621 and the second connecting nut 622, the upper end of the connecting screw 61 is fixed to the external component, ensuring that the caster is firmly connected during normal use. When the first connecting nut 621 or the second connecting nut 622 cannot be disassembled due to rust, slippage or damage, the connecting screw 61 can be moved relative to the external component by screwing the third connecting nut 623, thereby realizing the emergency disassembly of the caster bracket 1, which greatly improves the convenience of maintenance.

[0049] Furthermore, multiple connecting nuts distribute the load at different locations, avoiding stress concentration on a single thread segment, which helps improve the load-bearing capacity and fatigue life of the connection structure.

[0050] Preferably, a limiting baffle is provided on one side of the third connecting nut 623 to prevent the third connecting nut 623 from loosening during normal use. By providing a limiting baffle on one side of the third connecting nut 623, the third connecting nut 623 can be limited in both circumferential and axial directions, avoiding the third connecting nut 623 from rotating and loosening on its own due to inertia or reverse torque under conditions of frequent movement, vibration or impact of the caster, thus ensuring the long-term stability and reliability of the connection structure.

[0051] Working principle: When the user needs to lock the wheel, the drive unit 31 is moved downwards vertically. The drive unit 31 rotates downwards under force, thereby driving the locking arm 32, which is integrally formed with the drive unit 31, to rotate synchronously. During the rotation, the locking arm 32 presses against the hook portion 221 on the brake spring 2, pushing the first brake part 22 to swing downwards vertically, so that the brake nut 41 provided on the first brake part 22 gradually approaches and presses against the wheel, realizing the braking lock of the wheel; at the same time, the second brake part 23 of the brake spring 2 swings upwards with its overall movement, and the locking of the second brake part 23... The protruding plate 231 extends into the circumferentially distributed locking grooves 51 of the universal module 5, restricting the rotational freedom of the universal module 5, thereby simultaneously completing the dual locking of the caster's rolling and steering. When it is necessary to unlock the wheel, the drive part 31 is reversed to reset it upward. Under the action of the elastic restoring force of the brake spring 2, the first brake part 22 rebounds upward, the brake nut 41 disengages from the wheel, and the brake is released. At the same time, the second brake part 23 swings downward to reset, the locking protruding plate 231 moves away from the locking grooves 51, the universal module 5 is released, and the free rolling and steering functions of the caster are restored.

[0052] Furthermore, in the wheel locked state, the locking arm 32 rotates relative to the caster bracket 1 as the drive unit 31 rotates, so that the clearance opening 12 is in an open state. The user can insert a tool into the screwing groove 421 of the screwing member 42 through the clearance opening 12 and rotate the screwing member 42. Since the brake nut 41 is fixed by the reverse support of the wheel at this time, the screwing member 42 drives the brake nut 41 to make axial micro-adjustment under the action of thread transmission, thereby adjusting its clamping force on the wheel and realizing the adjustment of the preload. In the wheel unlocked state, the locking arm 32 blocks the clearance opening 12, physically blocking the operation of the screwing member 42, thereby preventing accidental adjustment.

[0053] The implementation method of Example 1 is as follows: A caster with a detachable structure includes a caster bracket 1 for mounting the wheel body and a brake spring 2 connected to the caster bracket 1 and capable of elastic deformation. The caster bracket 1 is provided with a mounting through hole 11. One side of the brake spring 2 extends toward the mounting through hole 11 to form an elastically deformable snap-fit ​​protrusion 20. The snap-fit ​​protrusion 20 engages with the mounting through hole 11 to achieve a detachable connection between the brake spring 2 and the caster bracket 1.

[0054] This invention connects the snap-fit ​​protrusion on the brake spring to the mounting through hole on the caster bracket using a snap-fit ​​mechanism. This eliminates the need for specialized riveting equipment and expertise, simplifying the installation process. When users need to maintain or replace parts, they simply apply external force to the snap-fit ​​protrusion through the mounting through hole using a simple tool. The snap-fit ​​protrusion undergoes elastic deformation under pressure, allowing users to easily remove the brake spring from the caster bracket. This effectively solves the problem that existing brake springs are often installed on caster brackets using rivets. However, the riveting process relies on specialized equipment, is complex, and makes it difficult to remove the brake spring when repairing or replacing parts of the caster structure, increasing maintenance difficulty.

[0055] The implementation method of Example 2 is as follows: Based on Example 1, Example 2 also has the following implementation method: The brake spring 2 is provided with a drive member 3 that can rotate relative to the caster bracket 1, and a preload adjustment mechanism 4 for adjusting the brake preload. The preload adjustment mechanism 4 includes a brake nut 41. When the drive member 3 rotates relative to the caster bracket 1, the drive member 3 drives the brake spring 2 to rotate, so that the brake nut 41 locks or unlocks the wheel.

[0056] The implementation method of Example 3 is as follows: Based on Example 1, Example 3 also has the following implementation method: The brake spring 2 includes a support portion 21. One side of the support portion 21 is bent and extended toward the mounting through hole 11 to form a snap-fit ​​protrusion 20. There is a height difference between the plane where the support portion 21 is located and the plane where the mounting through hole 11 is located, so as to form a deformation space for the snap-fit ​​protrusion 20 to undergo elastic deformation when the snap-fit ​​protrusion 20 is assembled with the mounting through hole 11.

[0057] The implementation method of Example 4 is as follows: Based on Embodiment 3, Embodiment 4 further includes the following implementation: The mounting through hole 11 includes a first mounting through hole 111 and a second mounting through hole 112; the snap-fit ​​protrusion 20 includes a first snap-fit ​​protrusion 201 corresponding to the first mounting through hole 111 and a second snap-fit ​​protrusion 202 corresponding to the second mounting through hole 112; a first deformation gap 2011 is formed between the first snap-fit ​​protrusion 201 and the first mounting through hole 111; and a second deformation gap 2021 is formed between the second snap-fit ​​protrusion 202 and the second mounting through hole 112.

[0058] The implementation method of Example 5 is as follows: Based on Example 2, Example 5 also has the following implementation method: The brake spring 2 includes a first brake part 22, the preload adjustment mechanism 4 is disposed on the first brake part 22, the drive member 3 includes a drive part 31 and a snap-fit ​​arm 32 that is inclinedly connected to the drive part 31, a snap-fit ​​opening 33 is provided between the drive part 31 and the snap-fit ​​arm 32, and the end of the first brake part 22 is bent upward to form a snap-fit ​​hook part 221 that engages with the snap-fit ​​opening 33.

[0059] The implementation method of Example 6 is as follows: Based on Embodiment 5, Embodiment 6 further includes the following implementation: The preload adjustment mechanism 4 includes a screwing member 42 that can rotate relative to the first braking part 22 and is threadedly connected to the brake nut 41. The caster bracket 1 is provided with an clearance opening 12. The locking arm 32 extends from the inside of the caster bracket 1 outward into the clearance opening 12. When the brake nut 41 unlocks the wheel, the locking arm 32 blocks the clearance opening 12. When the brake nut 41 locks the wheel, the locking arm 32 rotates with the drive part 31 to open the clearance opening 12.

[0060] The implementation method of Example 7 is as follows: Based on Example 6, Example 7 also has the following implementation method: a screwing groove 421 is provided on the side of the screwing member 42 near the clearance opening 12, and the screwing groove 421 is arranged at intervals along the circumferential direction of the screwing member 42.

[0061] The implementation method of Example 8 is as follows: Based on Embodiment 1, Embodiment 8 further includes the following implementation: the caster bracket 1 is provided with a universal module 5 for the caster bracket 1 to move in a circumferential direction, and the brake spring 2 includes a second braking part 23 for locking or unlocking the universal module 5.

[0062] The implementation method of Example 9 is as follows: Based on Embodiment 8, Embodiment 9 further includes the following implementation: the universal module 5 is provided with a plurality of snap-fit ​​grooves 51 distributed circumferentially, and the second braking part 23 is provided with a snap-fit ​​protrusion 231. The plurality of snap-fit ​​grooves 51 engage with the snap-fit ​​protrusion 231 so that the second braking part 23 locks or unlocks the universal module 5.

[0063] The implementation method of Example 10 is as follows: Based on Embodiment 8, Embodiment 10 further includes the following implementation: The caster bracket 1 is provided with a connecting mechanism 6 for connecting the universal module 5 and external components so that the caster bracket 1 can rotate universally relative to the external components. The connecting mechanism 6 includes a connecting screw 61 arranged vertically and passing through the universal module 5, and a connecting nut assembly 62 threadedly connected to the connecting screw 61. The connecting nut assembly 62 includes a first connecting nut 621, a second connecting nut 622, and a third connecting nut 623 arranged sequentially from top to bottom from the connecting screw 61. The first connecting nut 621 and the second connecting nut 622 are used to fix the connecting screw 61 to the external components, and the third connecting nut 623 is located between the universal module 5 and the caster bracket 1.

[0064] The implementation method of Example 11 is as follows: The difference between Example 11 and Example 6 is that the preload adjustment mechanism 4 includes an eccentric wheel and an adjustment knob. The eccentric wheel is fixed to the end of the brake spring. The adjustment knob drives the eccentric wheel to rotate. The outer edge of the eccentric wheel contacts the side of the wheel body. By rotating, the eccentricity is changed, thereby adjusting the pressure applied to the wheel body.

[0065] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A caster with a detachable structure, comprising a caster bracket (1) for mounting the wheel body, and a brake spring (2) connected to the caster bracket (1) and capable of elastic deformation, characterized in that: The caster bracket (1) is provided with a mounting through hole (11). One side of the brake spring (2) extends toward the mounting through hole (11) to form an elastically deformable snap-fit ​​protrusion (20). The snap-fit ​​protrusion (20) engages with the mounting through hole (11) to achieve a detachable connection between the brake spring (2) and the caster bracket (1). The brake spring (2) is provided with a drive member (3) that can rotate relative to the caster bracket (1) and a preload adjustment mechanism (4) for adjusting the brake preload. The preload adjustment mechanism (4) includes a brake nut (41). When the drive member (3) rotates relative to the caster bracket (1), the drive member (3) drives the brake spring (2) to rotate, so that the brake nut (41) locks or unlocks the wheel.

2. A caster with a detachable structure according to claim 1, characterized in that: The brake spring (2) includes a support portion (21), one side of which bends and extends toward the mounting through hole (11) to form the snap-fit ​​protrusion (20). There is a height difference between the plane where the support portion (21) is located and the plane where the mounting through hole (11) is located, so as to form a deformation space for the snap-fit ​​protrusion (20) to undergo elastic deformation when the snap-fit ​​protrusion (20) is assembled with the mounting through hole (11).

3. A caster with a detachable structure according to claim 2, characterized in that: The mounting through hole (11) includes a first mounting through hole (111) and a second mounting through hole (112). The snap-fit ​​protrusion (20) includes a first snap-fit ​​protrusion (201) corresponding to the first mounting through hole (111) and a second snap-fit ​​protrusion (202) corresponding to the second mounting through hole (112). A first deformation gap (2011) is formed between the first snap-fit ​​protrusion (201) and the first mounting through hole (111), and a second deformation gap (2021) is formed between the second snap-fit ​​protrusion (202) and the second mounting through hole (112).

4. A caster with a detachable structure according to claim 1, characterized in that: The brake spring (2) includes a first brake part (22), the preload adjustment mechanism (4) is provided on the first brake part (22), the drive member (3) includes a drive part (31) and a snap-fit ​​arm (32) that is inclinedly connected to the drive part (31), a snap-fit ​​opening (33) is provided between the drive part (31) and the snap-fit ​​arm (32), and the end of the first brake part (22) bends upward to form a snap-fit ​​hook part (221) that engages with the snap-fit ​​opening (33).

5. A caster with a detachable structure according to claim 4, characterized in that: The preload adjustment mechanism (4) includes a screwing member (42) that can rotate relative to the first braking part (22) and is threadedly connected to the brake nut (41). The caster bracket (1) is provided with an clearance opening (12). The locking arm (32) extends from the inside of the caster bracket (1) into the clearance opening (12). When the brake nut (41) unlocks the wheel, the locking arm (32) blocks the clearance opening (12). When the brake nut (41) locks the wheel, the locking arm (32) rotates with the drive part (31) to open the clearance opening (12).

6. A caster with a detachable structure according to claim 5, characterized in that: The screwing component (42) has a screwing groove (421) on the side near the clearance opening (12), and the screwing groove (421) is arranged at intervals along the circumferential direction of the screwing component (42).

7. A caster with a detachable structure according to claim 1, characterized in that: The caster bracket (1) is provided with a universal module (5) for the caster bracket (1) to make circumferential movement, and the brake spring (2) includes a second brake part (23) for locking or unlocking the universal module (5).

8. A caster with a detachable structure according to claim 7, characterized in that: The universal module (5) is provided with multiple snap-fit ​​grooves (51) distributed circumferentially, and the second braking part (23) is provided with snap-fit ​​protrusions (231). The multiple snap-fit ​​grooves (51) engage with the snap-fit ​​protrusions (231) to lock or unlock the universal module (5).

9. A caster with a detachable structure according to claim 7, characterized in that: The caster bracket (1) is provided with a connecting mechanism (6) for connecting the universal module (5) and the external component so that the caster bracket (1) can rotate universally relative to the external component. The connecting mechanism (6) includes a connecting screw (61) arranged vertically and passing through the universal module (5) and a connecting nut assembly (62) threadedly connected to the connecting screw (61). The connecting nut assembly (62) includes a first connecting nut (621), a second connecting nut (622) and a third connecting nut (623) arranged sequentially from top to bottom from the connecting screw (61). The first connecting nut (621) and the second connecting nut (622) are used to fix the connecting screw (61) to the external component. The third connecting nut (623) is located between the universal module (5) and the caster bracket (1).

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