Movable caster

Abstract

The utility model discloses a movable caster, which belongs to the technical field of casters, and is characterized in that the protruding distance of the tail end, far away from the axis of a rotation stopping piece, of a first clamping block is smaller, so that the tail end, far away from the axis of the rotation stopping piece, of the first clamping block is prevented from blocking the movement of a second clamping block, and a first braking part can smoothly rotate along a first rotating direction; the second clamping block abuts against any first clamping block, in the upward moving process of the second clamping block, the second clamping block can slide along the obliquely-arranged first clamping block, the first clamping block can be guided to drive the rotation stopping piece to rotate, the first clamping block and the second clamping block are staggered, and then the second clamping block is smoothly inserted between the two adjacent first clamping blocks; braking of the rotation stopping piece and the rotating shaft is completed; meanwhile, the second braking part rotates in the first rotating direction and abuts against the outer wall of the roller, and braking of the roller is completed; therefore, by the adoption of the movable trundle, the mode that the first braking part brakes the rotation stopping piece and the rotating shaft is smooth, and the braking operation of the movable trundle is more convenient and faster.

Description

Technical Field

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

[0002] The structure of swivel casters allows rotation around a vertical axis. They can be installed on the bottom of instruments such as trolleys, walking carts, and medical equipment carts to facilitate movement. Currently, the braking devices of swivel casters can generally stop both the rotation of the rollers and the overall omnidirectional rotation of the caster. The braking device stops the omnidirectional rotation by pressing or locking the axle with a brake unit. However, the existing brake units do not brake the axle smoothly enough, requiring users to repeat the operation multiple times to successfully brake the axle, making the braking operation of swivel casters somewhat inconvenient. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a movable caster in which the first braking part brakes the anti-rotation component and the rotating shaft in a smoother manner, making the braking operation of the movable caster more convenient.

[0004] The movable caster according to an embodiment of the present utility model includes:

[0005] The mounting base is provided with a through shaft hole;

[0006] The rotating shaft is rotatably disposed in the shaft hole;

[0007] An anti-rotation component is connected to the bottom of the rotating shaft. The bottom of the anti-rotation component is provided with a plurality of first locking blocks. The plurality of first locking blocks are distributed at intervals around the rotation axis of the anti-rotation component. The downward protrusion of each first locking block gradually decreases outward along the radial direction of the anti-rotation component.

[0008] Roller, hinged to the mounting base;

[0009] A locking member is hinged to the mounting base. The locking member has a first braking part and a second braking part. The first braking part is located below the anti-rotation member. The top of the first braking part has a second locking block. The second braking part is located above the roller.

[0010] The locking member rotates in the first rotation direction to insert the second block between any two adjacent first blocks and the second braking part abuts against the roller. The locking member rotates in the second rotation direction to disengage the second block from the anti-rotation member and the second braking part from the roller.

[0011] The movable caster according to the embodiment of this utility model has at least the following beneficial effects: When the locking member is rotated along the first rotation direction, the second locking block of the first braking part moves towards the bottom of the anti-rotation member. Since the downward protrusion distance of each first locking block gradually decreases radially outward along the anti-rotation member, that is, the protrusion distance of the end of the first locking block away from the axis of the anti-rotation member is smaller, the end of the first locking block away from the axis of the anti-rotation member is prevented from blocking the movement of the second locking block, which helps the first braking part to rotate smoothly along the first rotation direction; and when the second locking block is not inserted between the two first locking blocks, the second locking block can interact with either one of the first locking blocks. As the first locking block abuts against the second locking block and the second locking block moves upward, the second locking block slides along the inclined first locking block, which helps guide the first locking block to drive the anti-rotation member to rotate, causing the first locking block and the second locking block to be misaligned. This allows the second locking block to smoothly insert between two adjacent first locking blocks, completing the braking of the anti-rotation member and the rotating shaft. At the same time, the second braking part rotates along the first rotation direction and abuts against the outer wall of the roller, completing the braking of the roller. Therefore, with the movable caster of this utility model, the first braking part brakes the anti-rotation member and the rotating shaft more smoothly, making the braking operation of the movable caster more convenient.

[0012] According to some embodiments of the present invention, the bottom corners of each of the first card blocks are provided with rounded corners or chamfers.

[0013] According to some embodiments of the present invention, the thickness of each first card block in the horizontal direction gradually increases outward along the radial direction of the anti-rotation member.

[0014] According to some embodiments of the present invention, the thickness of each second block in the horizontal direction gradually decreases towards the anti-rotation member.

[0015] According to some embodiments of the present invention, a plurality of reinforcing ribs are provided between the first braking part and the second braking part.

[0016] According to some embodiments of this utility model, the movable caster further includes:

[0017] An elastic element connects the locking element to the mounting base, the elastic element causing the locking element to have a tendency to rotate in the second rotation direction.

[0018] According to some embodiments of this utility model, the movable caster further includes:

[0019] A foot pedal is hinged to the mounting base. The foot pedal is provided with a push block. The locking member is located on the rotation trajectory of the push block along the first rotation direction. The foot pedal rotates along the first rotation direction, causing the push block to push the locking member to rotate along the first rotation direction.

[0020] According to some embodiments of the present invention, the top of the locking member is provided with a groove, the groove being located on the rotation trajectory of the push block along the second rotation direction. When the push block rotates into the groove, the elastic member pushes the locking member to rotate along the second rotation direction.

[0021] According to some embodiments of the present invention, the bottom of the foot pedal is provided with a limiting block, the distance between the limiting block and the rotation axis of the second braking part is greater than the distance between the push block and the rotation axis of the second braking part, and when the second braking part abuts against the roller, the limiting block abuts against the top of the second braking part.

[0022] According to some embodiments of the present invention, the top of the locking member is provided with a mounting post, the mounting base is provided with a mounting hole, the mounting hole is located on the rotation trajectory of the mounting post along the first rotation direction, one end of the elastic member is fitted onto the mounting post, and the other end of the elastic member is disposed in the mounting hole. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a movable caster according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded view of a movable caster according to an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of a movable caster in a movable state according to an embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional schematic diagram of a movable caster in a braking state according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the rotating shaft, anti-rotation component, and locking component in one embodiment of this utility model;

[0028] Figure 6 This is a structural schematic diagram of the rotating shaft, anti-rotation component, and locking component from another angle in one embodiment of this utility model;

[0029] Figure 7 This is a schematic diagram of the locking component in one embodiment of the present invention.

[0030] Reference numerals: Mounting base 100, shaft hole 110, mounting hole 120, rotating shaft 200, anti-rotation component 300, first locking block 310, roller 400, locking component 500, first braking part 510, second locking block 511, second braking part 520, reinforcing rib 530, groove 540, mounting post 550, foot pedal 600, push block 610, limit block 620. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms front, back, up, down, axial, circumferential, etc., indicate the orientation or positional relationship 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.

[0033] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0034] In the description of this utility model, it should be noted that terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0036] Reference Figures 1 to 7 As shown, this utility model provides a movable caster.

[0037] The movable caster includes a mounting base 100, a pivot 200, an anti-rotation component 300, a roller 400, a locking component 500, an elastic component (not shown in the figure), and a foot pedal 600.

[0038] Reference Figures 1 to 4As shown, the top of the mounting base 100 is provided with a shaft hole 110 that runs through the vertical direction. The rotating shaft 200 is installed in the shaft hole 110 and can rotate in the shaft hole 110. The top of the rotating shaft 200 extends above the mounting base 100. The top of the rotating shaft 200 is used to connect to the bottom of instruments such as handcarts, walking carts, and medical equipment carts. The bottom of the rotating shaft 200 is provided with a connecting post. The top of the connecting post is provided with a step. The connecting post extends to the bottom of the shaft hole 110. The side wall of the connecting post is provided with at least one first anti-rotation plane. The bottom of the connecting post is provided with a screw.

[0039] Reference Figure 5 and Figure 6 As shown, the anti-rotation member 300 is circular, and a connecting hole is provided at the center of the shaft of the anti-rotation member 300. The shape of the connecting hole matches the shape of the connecting post. At least one second anti-rotation plane is provided on the inner side wall of the connecting hole. The connecting hole is fitted into the connecting post, and the second anti-rotation plane abuts against the first anti-rotation plane, so that the rotating shaft 200 and the anti-rotation member 300 rotate synchronously. By using bolts and screws, the anti-rotation member 300 is limited between the step of the connecting post and the bolt, and the anti-rotation member 300 is limited between the bottom end of the shaft hole 110 of the mounting base 100 and the bolt.

[0040] The bottom of the anti-rotation member 300 is provided with a plurality of first locking blocks 310. The plurality of first locking blocks 310 are evenly spaced along the circumference of the anti-rotation member 300. In this embodiment, all the first locking blocks 310 are arranged in a circular array around the rotation axis of the anti-rotation member 300, and all the first locking blocks 300 form a first tooth surface on the bottom of the anti-rotation member 300.

[0041] The downward protrusion of each first locking block 310 gradually decreases outward along the radial direction of the anti-rotation member 300, the thickness of each first locking block 310 in the horizontal direction gradually increases outward along the radial direction of the anti-rotation member, and the bottom corners of each first locking block 310 are rounded.

[0042] Reference Figures 1 to 4 As shown, the bottom of the mounting base 100 is provided with a downwardly extending mounting bracket, the mounting bracket is hinged to a roller 400, the rotation axis of the roller 400 is set in the left-right direction, the rotation axis of the roller 400 is offset from the shaft hole 110 in the front-back direction, the rotation axis of the roller 400 is located in front of the axis of the shaft hole 110, and there is a space between the roller 400 and the anti-rotation member 300.

[0043] Reference Figures 3 to 4 As shown, the locking member 500 is hinged to the mounting base 100, and the rotation axis of the locking member 500 is set in the left-right direction. The locking member 500 is located above the roller 400. The locking member 500 is divided into a second braking part 520 and a first braking part 510 connected front and rear by the rotation axis. The second braking part 520 is located above the roller 400, and the first braking part 510 is located below the anti-rotation member 300.

[0044] An angle is formed between the first braking part 510 and the second braking part 520. Multiple reinforcing ribs 530 are provided at the bottom of the first braking part 510 and the second braking part 520, and the multiple reinforcing ribs 530 are distributed at intervals in the left and right direction.

[0045] The reinforcing rib 530 strengthens the structural strength at the angle between the first braking part 510 and the second braking part 520. The reinforcing rib 530 helps to reduce the amount of deformation caused by repeated braking actions over a long period of time at the angle between the first braking part 510 and the second braking part 520, thereby ensuring that the locking member 500 maintains its braking function over a long period of time.

[0046] The top of the first braking part 510 is provided with a plurality of second locking blocks 511. The plurality of second locking blocks 511 are evenly spaced around the axis of the anti-rotation member 300. In this embodiment, all the second locking blocks 511 are arranged in a circular array around the axis of the anti-rotation member 300.

[0047] Each second locking block 511 decreases from front to back in the horizontal direction, and the upward protrusion of each second locking block 511 gradually decreases forward along the radial direction of the anti-rotation member 300. All second locking blocks 511 form a second tooth surface on the top of the first braking part 510, and the second tooth surface is used to mesh with the first tooth surface.

[0048] The anti-rotation member 300 is located on the rotation trajectory of the first braking part 510 along the first rotation direction, and the second locking block 511 is inserted between any two adjacent first locking blocks 310 at the bottom of the anti-rotation member 300 after rotating along the first rotation direction.

[0049] Since the downward protrusion of each first locking block 310 gradually decreases outward along the radial direction of the anti-rotation member 300, that is, the protrusion of the end of the first locking block 310 away from the axis of the anti-rotation member 300 is smaller, rotating the locking member 500 along the first rotation direction causes the second locking block 511 of the first braking part 510 to move towards the bottom of the anti-rotation member 300, thus preventing the end of the first locking block 310 away from the axis of the anti-rotation member 300 from blocking the movement of the second locking block 511, which helps the first braking part 510 to rotate smoothly along the first rotation direction.

[0050] Each second block 511 decreases from front to back in the horizontal direction. Since the rear end of the second block 511 contacts the bottom of the anti-rotation member 300 first, it helps the rear end of the second block 511 to be smoothly inserted between any two adjacent first blocks 310.

[0051] Each first locking block 310 has rounded or chamfered bottom corners. When the second locking block 511 rotates along the first rotation direction and comes into contact with the first locking block 310, the rounded or chamfered corners can guide the second locking block 511, causing the second locking block 511 to push the first locking block 310 to rotate along the rounded or chamfered corners. This helps to offset the first locking block 310 and the second locking block 511, so that after the second locking block 511 rotates along the first rotation direction, it can be inserted between any two adjacent first locking blocks 310 at the bottom of the anti-rotation member 300, making the action of the first braking part 510 braking the anti-rotation member 300 smoother.

[0052] The first braking part 510 has a mounting post 550 at its top. The mounting post 550 protrudes upward and has a downward-recessed annular cavity around its periphery. The mounting seat 100 has a mounting hole 120 above the corresponding mounting post 550. The elastic element is a compression spring. The bottom end of the elastic element is fitted onto the outside of the mounting post 550 and inserted into the annular cavity. The top end of the elastic element is located in the mounting hole 120. The elastic force of the elastic element pushes the locking part 500 to rotate in the second rotation direction.

[0053] The elastic element helps the locking element 500 to rotate smoothly in the second rotation direction after the brake is released, making the action of releasing the brake of the locking element 500 smoother.

[0054] The foot pedal 600 is hinged to the mounting base 100 and rotates about an axis extending in the left-right direction. The foot pedal 600 is located above the locking member 500, specifically above the second braking part 520.

[0055] The foot pedal 600 has a push block 610 and a limit block 620 at its bottom. Both the push block 610 and the limit block 620 are located above the second brake part 520. The limit block 620 is located in front of the push block 610. The distance from the push block 610 to the rotation axis of the second brake part 520 is less than the distance from the limit block 620 to the rotation axis of the second brake part 520.

[0056] The top of the second braking part 520 is provided with a groove 540, which is located on the rotation trajectory of the push block 610 along the second rotation direction. The rear sidewall of the groove 540 gradually slopes backward from front to back, so that the rear sidewall of the groove 540 and the top surface of the second braking part 520 form a smooth transition. This helps the push block 610 to smoothly leave the groove 540 from the rear sidewall when rotating along the second rotation direction. When the foot pedal 600 rotates along the second rotation direction, the push block 610 slides from back to front into the groove 540. The elastic member pushes the locking member 500 to rotate along the second rotation direction, causing the second braking part 520 to separate from the roller 400 and the first braking part 510 to separate from the anti-rotation member 300.

[0057] When the foot pedal 600 is stepped on, it rotates in the first rotation direction. The push block 610 slides backward from the groove 540. The push block 610 pushes the second brake part 520 to rotate in the first rotation direction, causing the second brake part 520 to abut against the roller 400. The second locking block 511 of the first brake part 510 is inserted between any two adjacent first locking blocks 310 of the anti-rotation member 300. The limiting block 620 moves and abuts against the second brake part 520. The limiting block 620 can limit the second brake part 520, reduce the amount of upward bending deformation of the second brake part 520 due to the pressure of the roller 400, and help ensure that the second brake part 520 stops the roller 400.

[0058] The push block 610 helps to transmit the rotation of the foot pedal 600 in the first rotation direction to the locking member 500, and helps the user to brake the roller 400 and the shaft 200 by stepping on the front end of the foot pedal 600.

[0059] The locking element 500 is provided with a groove 540 to accommodate the push block 610, which helps to compress the thickness of the locking element 500 in the vertical direction, reduce the space in the mounting base 100 for accommodating the locking element 500, reduce the distance between the anti-rotation element 300 at the bottom of the rotating shaft 200 and the roller 400, and make the structure of the movable caster more compact.

[0060] Mounting base 100 has a stop block on the rotation trajectory of the rear end of pedal 600 along the second rotation direction. When the push block 610 of pedal 600 moves into the groove 540 at the top of the second braking part 520, the bottom of the rear end of pedal 600 abuts against the stop block, restricting pedal 600 from continuing to rotate along the second rotation direction and preventing push block 610 from disengaging from the front of groove 540.

[0061] The front end of the foot pedal 600 has an upwardly curved extension, see reference. Figure 4 As shown, when the foot pedal 600 rotates in the first rotation direction, causing the push block 610 to push the locking member 300 to brake the roller 400 and the anti-rotation member 300, a larger space is formed between the extension of the front end of the foot pedal 600 and the roller 400. This helps to push the foot pedal 600 to rotate in the second rotation direction from the space between the extension of the front end of the foot pedal 600 and the roller 400, making the action of the foot pedal 600 releasing the brake of the locking member 500 smoother.

[0062] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A swivel caster, characterized in that, include: The mounting base is provided with a through shaft hole; The rotating shaft is rotatably disposed in the shaft hole; An anti-rotation component is connected to the bottom of the rotating shaft. The bottom of the anti-rotation component is provided with a plurality of first locking blocks. The plurality of first locking blocks are distributed at intervals around the rotation axis of the anti-rotation component. The downward protrusion of each first locking block gradually decreases outward along the radial direction of the anti-rotation component. Roller, hinged to the mounting base; A locking member is hinged to the mounting base. The locking member has a first braking part and a second braking part. The first braking part is located below the anti-rotation member. The top of the first braking part has a second locking block. The second braking part is located above the roller. The locking member rotates in the first rotation direction to insert the second block between any two adjacent first blocks and the second braking part abuts against the roller. The locking member rotates in the second rotation direction to disengage the second block from the anti-rotation member and the second braking part from the roller.

2. The movable caster according to claim 1, characterized in that, The bottom corners of each of the first card blocks are rounded or chamfered.

3. The movable caster according to claim 1, characterized in that, The thickness of each of the first blocks in the horizontal direction gradually increases radially outward along the anti-rotation element.

4. The movable caster according to claim 1, characterized in that, The thickness of each of the second blocks in the horizontal direction gradually decreases towards the anti-rotation element.

5. The movable caster according to claim 1, characterized in that, Multiple reinforcing ribs are provided between the first braking part and the second braking part.

6. The movable caster according to claim 1, characterized in that, The movable casters also include: An elastic element connects the locking element to the mounting base, the elastic element causing the locking element to have a tendency to rotate in the second rotation direction.

7. The movable caster according to claim 6, characterized in that, The movable casters also include: A foot pedal is hinged to the mounting base. The foot pedal is provided with a push block. The locking member is located on the rotation trajectory of the push block along the first rotation direction. The foot pedal rotates along the first rotation direction, causing the push block to push the locking member to rotate along the first rotation direction.

8. The movable caster according to claim 7, characterized in that, The top of the locking member is provided with a groove, which is located on the rotation trajectory of the push block along the second rotation direction. When the push block rotates into the groove, the elastic member pushes the locking member to rotate along the second rotation direction.

9. The movable caster according to claim 7, characterized in that, The foot pedal is provided with a limiting block at its bottom. The distance between the limiting block and the rotation axis of the second brake part is greater than the distance between the push block and the rotation axis of the second brake part. When the second brake part abuts against the roller, the limiting block abuts against the top of the second brake part.

10. The movable caster according to claim 6, characterized in that, The locking member has a mounting post at its top, and the mounting base has a mounting hole. The mounting hole is located on the rotation trajectory of the mounting post along the first rotation direction. One end of the elastic member is fitted onto the mounting post, and the other end of the elastic member is disposed in the mounting hole.

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