Central control brake caster wheel

Abstract

The utility model discloses a novel central control brake trolley relates to trolley brake technical field, including support and wheel, still include brake actuating mechanism and brake trigger mechanism, and brake actuating mechanism comprises the telescopic link of axially movable, the spring of being sleeved on it, the brake block of being fixed in the end of rod and the spring support for lifting spring, and brake trigger mechanism includes the upper cover and lower cover of being fixed to support, and the top block of being accommodated in the cavity formed in the recess of both interiors, and the top block bottom end and telescopic link top end abut, and the top block top sets up drive hole, and through the rotation top block of tool, utilizes its eccentric structure to press down or release telescopic link, thereby overcoming or with the spring elasticity, drive brake block contact or separate from the wheel face, realize brake or release brake, the utility model has the advantages of labor saving, compact structure, brake state stable clear, mistake proofing and low cost.

Description

Technical Field

[0001] This utility model relates to the field of caster braking technology, and in particular to a centrally controlled brake caster. Background Technology

[0002] Casters are widely used in trolleys, medical devices, furniture, and industrial equipment, with their core function being to enable flexible movement and reliable positioning of the equipment. To ensure stable stopping when needed, casters with braking functions have become standard equipment.

[0003] However, existing centrally-operated brake casters use a lever or button on the side of the caster. Users press or flick the device to directly or via a linkage push a brake pad against the wheel surface or lock the axle. This structure is relatively intuitive, but often requires considerable operating force. Furthermore, the protruding operating parts are prone to accidental contact in narrow spaces, affecting equipment mobility. Alternatively, a foot pedal can be installed on top of the caster, and braking is achieved by pressing the pedal to drive a transmission mechanism. While this method is less strenuous, it is usually complex in structure, has many parts, resulting in higher costs, increased failure rates, and larger overall dimensions. Some casters lock the wheel's steering function by rotating a component instead of directly braking the wheel's rolling. This method cannot prevent equipment from sliding due to ground inclination, and the braking reliability is insufficient. Therefore, a centrally-operated brake caster is needed. Utility Model Content

[0004] The purpose of this utility model is to provide a centrally controlled brake caster that solves the problems of large operating force, complex structure, large space occupation, easy misoperation, and limited braking reliability in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a centrally controlled brake caster, including a bracket and a wheel mounted on the bracket, and further including a brake actuator and a brake trigger mechanism;

[0006] The brake actuator includes a telescopic rod axially movable on the bracket, a spring sleeved on the telescopic rod, a brake block fixed to the end of the telescopic rod, and a spring support fixed to the bracket for supporting the spring.

[0007] The brake triggering mechanism includes an upper cover and a lower cover fixed on the bracket, and a top block housed in a cavity formed by the internal grooves of the upper cover and the lower cover. The bottom end of the top block abuts against the top end of the telescopic rod.

[0008] The top of the top block has a drive hole. By inserting a tool into the drive hole and rotating the top block, the eccentric structure can be used to press down or release the telescopic rod, thereby overcoming or using the elastic force of the spring to drive the brake block to contact or disengage from the wheel surface, thus achieving braking or releasing.

[0009] Preferably, the drive hole of the top block is a hexagonal hole, which is adapted to be driven by a hexagonal bar or an internal hex wrench.

[0010] Preferably, the groove shape inside the upper and lower covers is adapted to the shape of the top block to restrict its axial movement and limit the rotation angle; when rotated to the first angle, the eccentric part of the top block abuts against the telescopic rod to keep it in a downward braking state; when rotated in the opposite direction to the second angle, the top block releases the pressure on the telescopic rod, and the spring pushes it back to the released state.

[0011] Preferably, the upper cover and the lower cover are fixedly connected by screws, and the mating surfaces of the two are provided with a positioning structure to prevent incorrect assembly direction.

[0012] Preferably, the lower cover has an internal threaded hole at its tail, and the spring support has a matching external thread at its tail, and the two are fixed by screwing together.

[0013] Preferably, the bottom of the lower cover is provided with a protrusion for positioning and engaging with an external mounting plate, and its tail is used to pass through a mounting hole on the mounting plate.

[0014] Preferably, the brake block is fixedly connected to the end of the telescopic rod by screws.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. It adopts the eccentric lever principle of the centrally located rotating top block, which allows users to complete the operation by rotating it at a small angle with standard tools, greatly reducing the operating force.

[0017] 2. The brake trigger and actuator are highly integrated with the overall modular design, which occupies little space; a clear and stable self-locking braking state is achieved through mechanical limit, preventing accidental activation.

[0018] 3. The upper and lower covers are equipped with anti-misassembly structures to ensure assembly consistency; the drive interface is a standard hexagonal hole, which is highly versatile, and the core module is easy to disassemble and maintain. Attached Figure Description

[0019] Figure 1 This is a schematic side view of the overall structure of the product of this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the product of this utility model;

[0021] Figure 3 This is a schematic diagram of the lower cover structure of the product of this utility model.

[0022] In the diagram: 1. Bracket; 2. Wheel; 3. Top cover; 4. Bottom cover; 5. Top block; 6. Telescopic rod; 7. Spring support; 8. Spring; 9. Brake block; 10. Groove; 11. Drive hole; 12. Screw; 13. Positioning structure; 14. Protrusion; 15. Mounting plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model relates to a centrally controlled brake caster, such as Figure 1-3 As shown, it includes a bracket 1 and a plate 15 that serve as the support and mounting base, wheels 2 that enable movement, a brake triggering mechanism that enables control, and a brake actuator that performs braking actions.

[0025] The bracket 1 is typically made of a metal sheet bent into a fork-shaped structure. Wheels 2 are rotatably mounted on its lower part via an axle. The flat plate 15 serves as the mounting base for connecting the casters to external equipment such as trolleys, medical devices, and furniture. The flat plate 15 is fixedly connected to the upper end of the bracket 1, for example, by welding, riveting, or bolting. Two key holes are pre-machined on the flat plate 15: a smaller positioning hole and a larger mounting through hole, such as a hollow rivet hole.

[0026] Furthermore, the top block 5 is placed into the receiving cavity on the upper part of the lower cover 4. The cross-section of the top block 5 is non-circular, for example, approximately D-shaped with a flat surface, and a drive hole 11 is machined at the top center. In this embodiment, the drive hole 11 is specifically a standard hexagonal countersunk hole for engaging with an internal hexagonal wrench or a hexagonal bar.

[0027] The upper cover 3 is fastened onto the lower cover 4, on which the top block 5 has been placed. To ensure the correctness of the assembly and prevent reverse installation, a matching positioning structure 13 is provided at the mating edges of the upper cover 3 and the lower cover 4.

[0028] For example, a raised positioning point can be set on the side wall of the lower cover 4, and a matching groove can be set at the corresponding position of the upper cover 3;

[0029] When the upper cover 3 and the lower cover 4 are fastened together, their interiors together form a groove 10 whose shape precisely matches the outer shape of the top block 5. This groove 10 allows the top block 5 to rotate about its axis, but strictly limits any movement of it in the axial direction perpendicular to the plate and in the radial direction, thus firmly restraining it in a predetermined position;

[0030] Use at least one screw 12 to securely connect the upper cover 3 and the lower cover 4;

[0031] Specifically, screw 12 passes through the light hole on the upper cover 3 and is screwed into the pre-set threaded hole on the top of the lower cover 4, thereby locking the upper cover 3, lower cover 4, and top block 5 into a whole brake trigger module.

[0032] Furthermore, firstly, spring 8 is fitted onto the body of telescopic rod 6, which is a straight rod with its upper end used to contact top block 5;

[0033] Insert the telescopic rod 6, which is fitted with spring 8, into the brake trigger module from below, that is, from the side closest to wheel 2;

[0034] Specifically, the telescopic rod 6 is made to pass through the guide hole at the tail of the lower cover 4, that is, the end away from the drive hole 11, and make its top end abut against the bottom eccentric surface of the top block 5 housed in the cavity.

[0035] Install the spring support 7. The inner hole at the tail of the lower cover 4 is machined with internal threads, while the outer diameter at the tail of the spring support 7 is machined with matching external threads. A fixed connection is achieved by screwing the spring support 7 into the tail of the lower cover 4. After screwing, the upper end of the spring support 7 supports the lower end of the spring 8, while the upper end of the spring 8 abuts against the shoulder of the telescopic rod 6 or a retaining ring fixed to the rod. The preload of the spring 8 can be finely adjusted by rotating the spring support 7.

[0036] The brake block 9 is installed by machining a threaded hole or providing a mounting surface at the lower end of the telescopic rod 6, and then securing it firmly in place with a screw. The brake block 9 is made of a wear-resistant friction material such as rubber or polyurethane.

[0037] Furthermore, the assembled module, which integrates the brake triggering mechanism and the actuator, is installed onto the flat plate 15.

[0038] Align the protruding protrusion 14 at the bottom of the lower cover 4 with the positioning hole on the flat plate 15 and insert it to achieve radial positioning;

[0039] Make the tail of the lower cover 4 pass through the larger mounting through hole on the plate 15;

[0040] Using additional fasteners such as bolts, rivets, or another set of screws through the corresponding mounting ears or holes on the plate 15 and the lower cover 4, the entire brake module is fastened to the plate 15, and a complete central brake caster assembly is completed.

[0041] In practical use: When braking is required, insert the Allen wrench into the drive hole 11 of the top block 5 and rotate it in one direction, such as clockwise. The top block 5 rotates accordingly under the restriction of the groove 10. Since there is an eccentricity between the rotation center of the top block 5 and the bottom surface that contacts the telescopic rod 6, its bottom surface will press down on the top of the telescopic rod 6 when rotating. The telescopic rod 6 overcomes the elastic force of the spring 8 and moves axially downward, eventually pushing the brake block 9 at its end to press tightly against the tire surface of the wheel 2. Braking is achieved through friction. When the top block 5 rotates to a specific angle, such as 90°, its side contacts the inner wall of the groove 10, forming a rotation limit. At this time, the eccentric high point of the top block 5 locks the telescopic rod 6 in the lowest position, and the mechanism enters a self-locking state. Even if the wrench is removed, the braking state can be stably maintained.

[0042] When the brakes need to be released, use a wrench to rotate the top block 5 counterclockwise. The eccentric high point of the top block 5 gradually moves away, reducing the pressure on the telescopic rod 6. After rotating beyond a certain angle, the bottom surface of the top block 5 releases the downward pressure on the telescopic rod 6. At this time, the compressed spring 8 releases its stored elastic potential energy, pushing the telescopic rod 6 upward to reset. The telescopic rod 6 drives the brake block 9 upward, causing it to disengage from the tire tread of the wheel 2, and the braking effect is completely released. Reverse rotation is also limited by the groove 10, ensuring that the top block 5 returns to the clearly defined release position.

[0043] Example 2

[0044] In another embodiment, the shape of the driving hole 11 is not limited to hexagonal, but can also be square, star-shaped, plum blossom-shaped or other non-circular holes. Rotation can be achieved simply by using the corresponding driving tool.

[0045] In addition to using screws 12, the upper cover 3 and the lower cover 4 can also be fixed by snap-fit ​​connection, ultrasonic welding and other effective fixing methods.

[0046] In addition to threaded connection, spring support 7 and lower cover 4 can also be fixed axially using snap rings or pins;

[0047] In addition to screw connection, brake block 9 and telescopic rod 6 can also be fixed by adhesive or snap-fit.

[0048] The flat plate 15 can be connected to the bracket 1 either by integral molding or by a non-detachable method.

[0049] These variations and substitutions based on the same inventive concept should all be considered to fall within the protection scope of this utility model.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrally controlled brake caster, comprising a bracket (1) and a wheel (2) mounted on the bracket (1), characterized in that: It also includes a brake actuator and a brake triggering mechanism; The brake actuator includes a telescopic rod (6) axially movable on the bracket (1), a spring (8) sleeved on the telescopic rod (6), a brake block (9) fixed to the end of the telescopic rod (6), and a spring support (7) fixed on the bracket (1) for supporting the spring (8). The brake triggering mechanism includes an upper cover (3) and a lower cover (4) fixed on the bracket (1), and a top block (5) housed in a cavity formed by the groove (10) inside the upper cover (3) and the lower cover (4), the bottom end of the top block (5) abutting against the top end of the telescopic rod (6). The top of the top block (5) is provided with a drive hole (11). By inserting a tool into the drive hole (11) and rotating the top block (5), the telescopic rod (6) can be pressed down or released by its eccentric structure, thereby overcoming or using the elastic force of the spring (8) to drive the brake block (9) to contact or disengage from the wheel surface of the wheel (2) to achieve braking or release.

2. The centrally controlled brake caster according to claim 1, characterized in that: The drive hole (11) of the top block (5) is a hexagonal hole, which is adapted to be driven by a hexagonal bar or an internal hexagonal wrench.

3. The centrally controlled brake caster according to claim 1 or 2, characterized in that: The groove (10) inside the upper cover (3) and lower cover (4) is adapted to the shape of the top block (5) to restrict its axial movement and limit the rotation angle; when rotated to the first angle, the eccentric part of the top block (5) presses against the telescopic rod (6) to keep it in a downward braking state; when rotated in the opposite direction to the second angle, the top block (5) releases the pressure on the telescopic rod (6), and the spring (8) pushes it back to the released state.

4. The centrally controlled brake caster according to claim 1, characterized in that: The upper cover (3) and the lower cover (4) are fixedly connected by screws (12), and a positioning structure (13) is provided on the mating surface of the two to prevent incorrect assembly direction.

5. The centrally controlled brake caster according to claim 4, characterized in that: The lower cover (4) has an internal threaded hole at its tail, and the spring support (7) has a matching external thread at its tail. The two are fixed by screwing together.

6. The centrally controlled brake caster according to claim 1, characterized in that: The bottom of the lower cover (4) is provided with a protrusion (14) for positioning and engaging with an external mounting plate (15), and its tail is used to pass through the mounting hole on the mounting plate (15).

7. The centrally controlled brake caster according to claim 1, characterized in that: The brake block (9) is fixedly connected to the end of the telescopic rod (6) by screws.

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