Caster and trolley with bidirectional brake mechanism

Abstract

The utility model relates to the technical field of trundle, specifically disclose a trundle and handcart with bidirectional brake mechanism, wherein, this trundle with bidirectional brake mechanism includes support, wheel body, mounting bracket, two connecting rods, brake cable assembly and elastic part, wheel body is connected with the support rotation, and mounting bracket is fixed on the support, two connecting rods are arranged respectively at the both sides of wheel body, and two connecting rods are all connected with mounting bracket rotation, and all be provided with brake pad on two connecting rods, brake cable assembly is connected with the free end of two connecting rods, and the both ends of elastic part abut respectively the free end of two connecting rods, when brake cable assembly is pulled, brake cable assembly can drive the free end of two connecting rods to approach each other, to make the brake pad on two connecting rods abut respectively the both sides of wheel body, when the tension on brake cable assembly disappears, elastic part pushes the free end of two connecting rods and resets to remove the brake state, the utility model can promote the brake effect, guarantee the security.

Description

Technical Field

[0001] This utility model relates to the field of caster technology, and in particular to a caster and trolley with a two-way braking mechanism. Background Technology

[0002] Casters, as convenient moving devices, are widely used in various types of furniture, equipment, and transportation vehicles, greatly facilitating people's daily lives and industrial production. Some casters have a braking function, which can stop the caster from rolling when needed to ensure the stability and safety of the items.

[0003] Most casters with braking mechanisms on the market currently use brake pads that contact the wheel from one side to achieve braking. This design works well when the caster is moving forward, but sometimes it cannot stop when the caster is moving in the opposite direction, which undoubtedly poses a potential safety risk to the user. Utility Model Content

[0004] This utility model provides a caster and a handcart with a two-way braking mechanism. The brake pads on both sides of the wheel can contact the two sides of the wheel to brake, thereby improving the braking effect and ensuring safety.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, an embodiment of the present invention provides a caster with a bidirectional braking mechanism, comprising a bracket, a wheel body, a mounting frame, two connecting rods, a brake cable assembly, and an elastic element. The wheel body is rotatably connected to the bracket, and the mounting frame is fixed to the bracket. The two connecting rods are respectively disposed on both sides of the wheel body, and both connecting rods are rotatably connected to the mounting frame. Each connecting rod is provided with a brake pad. The brake cable assembly is connected to the free ends of both connecting rods, and the two ends of the elastic element abut against the free ends of the two connecting rods respectively. When the brake cable assembly is pulled, the brake cable assembly can drive the free ends of the two connecting rods to move closer together, so that the brake pads on the two connecting rods abut against both sides of the wheel body respectively. When the tension on the brake cable assembly is removed, the elastic element pushes the free ends of the two connecting rods to reset, thereby releasing the braking state.

[0007] In some embodiments, the bracket includes two arms, and the wheel is located between the two arms; the mounting frame includes two sub-mounting frames, which are fixedly connected to the two arms respectively, and extend to both sides of the wheel respectively. Two connecting rods are rotatably connected to the two ends of the sub-mounting frame fixed on one of the arms, and the two connecting rods are also movably connected to the two ends of the sub-mounting frame fixed on the other arm respectively.

[0008] In some embodiments, a sub-mounting bracket movably connected to a connecting rod is provided with a through slot. A guide rod and a limiting plate connected to the guide rod are provided on the connecting rod. The guide rod passes through the through slot and can move in the through slot. The outer diameter of the limiting plate is larger than the width of the through slot. The sub-mounting bracket is located between the connecting rod and the limiting plate.

[0009] In some embodiments, the extension direction of the through slot is parallel to the extension direction of the sub-mount bracket, and the width of the through slot is greater than the outer diameter of the guide rod; or, the through slot is arranged in an arc shape with the rotation axis of the connecting rod and the sub-mount bracket as the center.

[0010] In some embodiments, the sub-mounting bracket has a protruding protrusion in the middle.

[0011] In some embodiments, the protrusion is connected to a mounting portion, which is fixedly connected to the support arm.

[0012] In some embodiments, the free ends of both connecting rods have baffles. The brake cable assembly includes a steel wire rope, a protective sleeve sleeved on the outside of the steel wire rope, an end assembly fixed to the end of the protective sleeve, and a connector fixed to the end of the steel wire rope. The steel wire rope passes through the baffles of the two connecting rods. The end assembly abuts against the outer side of the baffle of one connecting rod, and the connector abuts against the outer side of the baffle of the other connecting rod.

[0013] In some embodiments, the end assembly includes an end, a screw, and a nut. The end is connected to the end of the protective sleeve, the screw is connected to the end and passes through a baffle, the wire rope passes through the screw, and the nut is sleeved on the screw and abuts against the outer side of the baffle.

[0014] In some embodiments, the elastic element is a spring, with its two ends abutting against the baffles of two connecting rods, and the wire rope passing through the spring.

[0015] According to a second aspect of the present invention, an embodiment of the present invention provides a handcart, including a base plate, a handle fixed to the base plate, a brake actuator fixed to the handle, and a caster with a bidirectional braking mechanism as described in any of the first aspects above. The bracket is fixed to the bottom of the base plate, and the brake cable assembly is connected to the brake actuator.

[0016] This utility model has at least the following beneficial effects: When braking is required, the user can pull the brake cable assembly, which causes the free ends of the two connecting rods to move closer together, so that the brake pads on the two connecting rods abut against both sides of the wheel body. The brake pads can contact both sides of the wheel body to brake, thereby improving the braking effect and ensuring safety. When braking is not required, the user can stop applying force to the brake cable assembly, and the elastic element pushes the free ends of the two connecting rods to return to their original position, thereby releasing the braking state. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a caster with a bidirectional braking mechanism according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a caster with a bidirectional braking mechanism according to an embodiment of the present invention from another perspective;

[0019] Figure 3 This is a schematic diagram of the structure of a handcart according to an embodiment of the present invention.

[0020] The attached figures are labeled as follows:

[0021] Bracket 100, support arm 110;

[0022] Wheel body 200;

[0023] Mounting bracket 300, sub-mounting bracket 310, through slot 311, protrusion 320, mounting part 330;

[0024] Linkage 400, brake pads 410, limit disc 420, baffle 430;

[0025] Brake cable assembly 500, steel wire rope 510, protective sleeve 520, end cap 531, screw 532, nut 533, connector 540;

[0026] Elastic component 600;

[0027] Base plate 710, handle 720, brake actuator 730. Detailed Implementation

[0028] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0029] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this utility model.

[0030] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0031] An embodiment of this utility model provides a caster with a two-way braking mechanism, such as... Figure 1 and Figure 2 As shown, the caster includes a bracket 100, a wheel 200, a mounting bracket 300, two connecting rods 400, a brake cable assembly 500, and an elastic element 600. The wheel 200 is rotatably connected to the bracket 100, allowing it to rotate on the ground. The mounting bracket 300 is fixed to the bracket 100 for stability and moves with the entire caster. The two connecting rods 400 are respectively located on both sides of the wheel 200, specifically on both sides along the axial direction, both sides along the forward direction, or both sides in other directions. Both connecting rods 400 are rotatably connected to the mounting bracket 300, and the free ends of the two connecting rods 400 can rotate relative to their rotatably connected axes. Each connecting rod 400 is equipped with a brake pad 410.

[0032] The brake cable assembly 500 is connected to the free ends of both connecting rods 400, and the two ends of the elastic member 600 abut against the free ends of the two connecting rods 400 respectively. The elastic member 600 can apply a force to the free ends of the two connecting rods 400, causing the two connecting rods 400 to rotate in a direction away from each other.

[0033] When braking is required, the user can pull the brake cable assembly 500. The brake cable assembly 500 can drive the two connecting rods 400 to overcome the force of the elastic element 600. The free ends of the two connecting rods 400 move closer to each other, so that the brake pads 410 on the two connecting rods 400 respectively abut against the two sides of the wheel body 200. The brake pads 410 on both sides of the wheel body 200 can contact the two sides of the wheel body 200 respectively to brake. In this way, no matter whether the caster is moving forward or backward, it can provide greater braking force, thereby improving the braking effect and ensuring safety.

[0034] When the brake is no longer needed, the user stops pulling the brake cable assembly 500. The tension on the brake cable assembly disappears, and the elastic element 600 applies a force to the free ends of the two connecting rods 400, pushing the free ends of the two connecting rods 400 to reset, thereby releasing the brake and allowing the caster to move normally.

[0035] In some embodiments, such as Figure 1 and Figure 2 As shown, the bracket 100 includes two support arms 110, and the wheel 200 is located between the two support arms 110. The wheel 200 is rotatably connected to the two support arms 110 respectively. The two support arms 110 can provide support from both sides to keep the wheel 200 stable.

[0036] The mounting bracket 300 includes two sub-mounting brackets 310, which are fixedly connected to two support arms 110 respectively, and extend to both sides of the wheel body 200. Two connecting rods 400 are rotatably connected to the two ends of the sub-mounting bracket 310 fixed on one of the support arms 110, and the two connecting rods 400 are also movably connected to the two ends of the sub-mounting bracket 310 fixed on the other support arm 110 respectively.

[0037] This structure allows the connecting rod 400 to rotate relative to the mounting bracket 300. Simultaneously, because the connecting rod 400 is movably connected to the sub-mounting bracket 310 fixed to another support arm 110, this movable connection prevents the connecting rod 400 from easily detaching from the mounting bracket 300, maintaining a stable rotational connection. Furthermore, the movable connection has a range of motion; limiting this range constrains the rotation angle of the connecting rod 400, preventing excessive rotation.

[0038] Furthermore, the sub-mounting bracket 310, which is movably connected to the connecting rod 400, is provided with a through slot 311. The connecting rod 400 is provided with a guide rod and a limiting plate 420 connected to the guide rod. The guide rod passes through the through slot 311 and can move within the through slot 311 to achieve a movable connection between the connecting rod 400 and the sub-mounting bracket 310. The outer diameter of the limiting plate 420 is larger than the width of the through slot 311, making it difficult for the limiting plate 420 to pass through the through slot 311. The sub-mounting bracket 310 is located between the connecting rod 400 and the limiting plate 420, which is equivalent to constraining the sub-mounting bracket 310 between the connecting rod 400 and the limiting plate 420. This makes it difficult for the connecting rod 400 to detach from the sub-mounting bracket 310, thereby maintaining a relatively stable rotational connection state.

[0039] In one embodiment, the extension direction of the slot 311 is parallel to the extension direction of the sub-mount bracket 310, and the width of the slot 311 is greater than the outer diameter of the guide rod. Since the direction of movement of the guide rod is deflected at a certain angle when the connecting rod 400 rotates, the greater width of the slot 311 provides more space for the movement of the guide rod and avoids interference between the guide rod and the sub-mount bracket 310.

[0040] In another embodiment, the through slot 311 is arranged in an arc shape with the rotation axis of the connecting rod 400 and the sub-mount bracket 310 as the center. When the connecting rod 400 rotates, the guide rod slides accordingly in the through slot 311. This structure of the through slot 311 can be adapted to the movement path of the guide rod, thereby avoiding interference between the guide rod and the sub-mount bracket 310.

[0041] In some embodiments, such as Figure 1 and Figure 2As shown, the sub-mount bracket 310 has a protruding protrusion 320 in the middle. The design of the protrusion 320 can strengthen the structural strength of the sub-mount bracket 310, making it less prone to deformation or breakage.

[0042] The sub-mount bracket 310 can be formed into the protrusion 320 through processes such as bending or stamping. For example... Figure 1 As shown, the protrusion 320 can be in the shape of an arch bridge.

[0043] Furthermore, the protrusion 320 is connected to a mounting part 330, which is fixedly connected to the support arm 110, thereby fixing the entire sub-mounting bracket 310 onto the support arm 110. The mounting part 330 can be fixed onto the support arm 110 by various installation methods such as welding or screw fixing.

[0044] In this embodiment, the sub-mounting bracket 310, the protrusion 320 and the mounting portion 330 can be integrally formed to simplify the molding process and enhance the connection strength between them.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, both connecting rods 400 have baffles 430 at their free ends. The brake cable assembly 500 includes a steel wire rope 510, a protective sleeve 520 sleeved on the outside of the steel wire rope 510, an end assembly fixed to the end of the protective sleeve 520, and a connector 540 fixed to the end of the steel wire rope 510. The steel wire rope 510 can slide within the protective sleeve 520. The steel wire rope 510 passes through the baffles 430 of the two connecting rods 400. The end assembly abuts against the outer side of the baffle 430 of one connecting rod 400, and the connector 540 abuts against the outer side of the baffle 430 of the other connecting rod 400.

[0046] When braking is required, the wire rope 510 is pulled, which in turn pushes the baffle 430 abutted by the connector 540, causing the corresponding connecting rod 400 to rotate. The brake pad 410 on the connecting rod 400 abuts against the wheel 200, achieving braking on one side of the wheel 200. As the wire rope 510 continues to be pulled, the connector 540 cannot move further relative to the wheel 200 due to the obstruction of the wheel 200, but the wire rope 510 will move further relative to the protective sleeve 520. The end assembly will apply a reaction force to the baffle 430 on the other connecting rod 400, and the other connecting rod 400 will rotate towards the wheel 200, causing the brake pad 410 on the other connecting rod 400 to abut against the wheel 200, achieving braking on the other side of the wheel 200.

[0047] Furthermore, the end assembly includes an end 531, a screw 532, and a nut 533. The end 531 is connected to the end of the protective sleeve 520, the screw 532 is connected to the end 531, and the screw 532 passes through the baffle 430. The wire rope 510 passes through the screw 532, and the nut 533 is sleeved on the screw 532 and abuts against the outer side of the baffle 430.

[0048] By rotating the nut 533, the nut 533 can be moved relative to the screw 532, thereby adjusting the distance between the baffles 430 of the two connecting rods 400 and adjusting the initial position of the two connecting rods 400. This can change the force required for the user to brake, allowing the user to adjust according to their own situation and improve the user experience.

[0049] Furthermore, the elastic element 600 is a spring, with its two ends abutting against the baffles 430 of the two connecting rods 400 respectively, and the wire rope 510 passing through the spring. The two ends of the spring can apply elastic thrust to the baffles 430 of the two connecting rods 400 respectively, and facilitate the passage of the wire rope 510.

[0050] An embodiment of this utility model provides a handcart, such as Figure 3 As shown, the system includes a base plate 710, a handle 720 fixed to the base plate 710, a brake actuator 730 fixed to the handle 720, and a caster with a bidirectional braking mechanism according to any of the above embodiments. Detailed descriptions of the caster with the bidirectional braking mechanism can be found in the above embodiments and will not be repeated here. A bracket is fixed to the bottom of the base plate 710, and the brake cable assembly 500 is connected to the brake actuator 730.

[0051] When braking is required, the user can operate the brake actuator 730 to pull the brake cable assembly 500, thereby applying the brakes. The brake actuator 730 can be a conventional brake actuator in the prior art, for example, see Chinese invention patent publication number CN116353676A.

[0052] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A caster with a bidirectional brake mechanism, characterized by: The device includes a bracket, a wheel, a mounting frame, two connecting rods, a brake cable assembly, and an elastic element. The wheel is rotatably connected to the bracket, and the mounting frame is fixed to the bracket. The two connecting rods are respectively located on both sides of the wheel and are rotatably connected to the mounting frame. Each connecting rod is equipped with a brake pad. The brake cable assembly is connected to the free ends of both connecting rods, and the two ends of the elastic element abut against the free ends of the two connecting rods. When the brake cable assembly is pulled, it can drive the free ends of the two connecting rods to move closer together, so that the brake pads on the two connecting rods abut against both sides of the wheel. When the tension on the brake cable assembly is removed, the elastic element pushes the free ends of the two connecting rods to return to their original position, thereby releasing the brake.

2. The caster with bidirectional brake mechanism according to claim 1, characterized in that: The bracket includes two support arms, and the wheel is located between the two support arms; the mounting frame includes two sub-mounting frames, which are fixedly connected to the two support arms respectively, and the two sub-mounting frames extend to both sides of the wheel. Two connecting rods are rotatably connected to the two ends of the sub-mounting frame fixed on one of the support arms, and the two connecting rods are also movably connected to the two ends of the sub-mounting frame fixed on the other support arm respectively.

3. The caster with a bidirectional brake mechanism according to claim 2, characterized in that: The sub-mounting bracket, which is movably connected to the connecting rod, is provided with a through groove. The connecting rod is provided with a guide rod and a limiting plate connected to the guide rod. The guide rod passes through the through groove and can move in the through groove. The outer diameter of the limiting plate is larger than the width of the through groove. The sub-mounting bracket is located between the connecting rod and the limiting plate.

4. The caster with a bidirectional brake mechanism according to claim 3, characterized in that: The extension direction of the slot is parallel to the extension direction of the sub-mounting bracket, and the width of the slot is greater than the outer diameter of the guide rod; or, the slot is arranged in an arc shape with the rotation axis of the connecting rod and the sub-mounting bracket as the center.

5. The caster with bidirectional brake mechanism according to claim 2, characterized in that: The sub-mounting bracket has a protruding protrusion in the middle.

6. The caster with a bidirectional braking mechanism according to claim 5, characterized in that: The protrusion is connected to a mounting part, which is fixedly connected to the support arm.

7. The caster with a bidirectional brake mechanism according to any one of claims 1-6, characterized in that: Both connecting rods have baffles at their free ends. The brake cable assembly includes a steel wire rope, a protective sleeve fitted over the outside of the steel wire rope, an end assembly fixed to the end of the protective sleeve, and a connector fixed to the end of the steel wire rope. The steel wire rope passes through the baffles of the two connecting rods. The end assembly abuts against the outer side of the baffle of one connecting rod, and the connector abuts against the outer side of the baffle of the other connecting rod.

8. The caster with a bidirectional brake mechanism according to claim 7, characterized in that: The end assembly includes an end, a screw, and a nut. The end is connected to the end of the protective sleeve, the screw is connected to the end and passes through a baffle, the wire rope passes through the screw, and the nut is sleeved on the screw and abuts against the outer side of the baffle.

9. The caster with a bidirectional brake mechanism according to claim 7, characterized in that: The elastic element is a spring, and the two ends of the spring abut against the baffles of the two connecting rods respectively, and the steel wire rope passes through the spring.

10. A trolley characterised by: The device includes a base plate, a handle fixed to the base plate, a brake actuator fixed to the handle, and a caster with a bidirectional braking mechanism as described in any one of claims 1-9, wherein the bracket is fixed to the bottom of the base plate, and the brake cable assembly is connected to the brake actuator.

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