Pedal type self-locking trundle

Abstract

The utility model discloses a pedal type self-locking trundle which comprises a bolt fixing seat, side plates and a trundle body, the side plates are fixed to the left side and the right side of the bottom of the bolt fixing seat, the trundle body is connected between the two side plates through a rotating shaft, and a swing frame is installed on the outer sides of the side plates and rotationally connected with the side plates through torsion springs. A corrugated anti-sliding block is arranged on the inner wall of the top end of the swing frame, and a first sliding groove is formed in the edge of the surface frame, facing the bolt fixing base, of the swing frame. The swing frame is rotationally mounted on the outer side of the side plate through the torsion spring, the rotation fulcrum torsion spring of the swing frame and the circle center of the trundle are not located at the same position, and the abutting rod is driven to move up and down through the up-down displacement motion of the pedal plate, so that the abutting rod exerts pressure on the swing frame; the corrugated anti-skid block on the inner wall face of the top end of the swing frame makes contact with the surface of the trundle, the braking effect is achieved, the whole trundle structure has the rapid self-locking function, and rolling displacement of the trundle caused by external collision when the trundle does not move is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a foot-operated self-locking caster. Background Technique

[0002] Casters are almost indispensable in all walks of life. In modern times, with the continuous development of technology, equipment has become more and more multifunctional and highly utilized. Casters have become an essential component. Their casters can facilitate the movement of equipment and the transportation of objects. When movement is not required, it is necessary to prevent the casters from moving due to external collisions. Therefore, the casters need corresponding braking effects. For this reason, this solution provides a foot-operated self-locking caster, which enables the caster to have a convenient self-locking function when not moving, and avoids the rolling displacement of the caster caused by external collisions when not moving. Content of the Utility Model

[0003] The purpose of the utility model is to provide a foot-operated self-locking caster to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A foot-operated self-locking caster, including a bolt fixing seat, side plates and a caster. The left and right sides of the bottom of the bolt fixing seat are fixed with side plates. A caster is connected between the two side plates through a rotating shaft. A swing frame is installed outside the side plates and is located above the caster. The swing frame is rotationally connected to the side plates through a torsion spring, and the torsion spring is located at the top of the bearing connecting the side plates and the caster. A corrugated anti-slip block is arranged at the inner wall of the top end of the swing frame. A first chute is opened at the edge of the surface frame of the swing frame facing the bolt fixing seat;

[0005] Sliding brackets are installed at the bottom of the left and right sides of the bolt fixing seat. A foot pedal is slidably installed inside the sliding brackets. The top of the foot pedal is fixed to the top surface inside the sliding brackets through a tension spring. A vertically downward second chute is opened on the side surface of the sliding brackets facing the swing frame. One end of the foot pedal is connected with a resisting rod, and the end of the resisting rod passes through the second chute and is arranged opposite to the first chute at the edge of the surface frame of the swing frame;

[0006] A positioning plate is installed on one side of the sliding brackets. A plurality of hook slots are arranged from top to bottom at the outer edge of the positioning plate. A hook member is rotationally connected to the outer edge of the back of the foot pedal facing the positioning plate through a hinge shaft, and the hook member is located in the hook slots at the edge of the positioning plate.

[0007] Preferably, when the foot pedal moves downward in the sliding brackets, the resisting rod at one end of the foot pedal moves downward and is in the second chute. At this time, the swing frame rotates around the torsion spring. The corrugated anti-slip block on the inner wall surface of the top end of the swing frame closely adheres to the surface of the caster.

[0008] Preferably, when the foot pedal moves upward to reset under the pulling force of the tension spring within the sliding bracket, the abutting rod moves upward following the foot pedal, and the end of the abutting rod disengages from the second sliding groove. At this time, the swing frame is reset under the spring torque of the torsion spring and swings towards the bolt fixing seat with the torsion spring as the center pivot point, and the corrugated anti-sliding block on the inner wall surface of the top end of the swing frame is separated from the surface of the caster wheel.

[0009] Preferably, the corrugated anti-sliding block is made of rubber.

[0010] Preferably, when the hook member rotates and adheres to the outer edge of the foot pedal through the hinge shaft, the hook member disengages from the hook groove at the positioning plate, and the foot pedal moves upward to reset under the pulling force of the tension spring.

[0011] Beneficial effects

[0012] The utility model provides a foot-operated self-locking caster wheel, which has the following beneficial effects:

[0013] In the utility model, a swing frame is rotatably installed on the outer side of the side plate through a torsion spring. The rotation pivot point torsion spring of the swing frame and the center of the caster wheel are not at the same position. The up and down displacement movement of the foot pedal drives the up and down displacement of the abutting rod, so that the abutting rod applies pressure to the swing frame, making the corrugated anti-sliding block on the inner wall surface of the top end of the swing frame contact with the surface of the caster wheel, achieving a braking effect. And after releasing the pressure applied to the foot pedal, the foot pedal can be pulled upward to reset by the tension spring, enabling the normal movement of the caster wheel. The entire caster wheel structure has the function of quick self-locking, avoiding the rolling displacement of the caster wheel caused by external collision when not moving. Description of the drawings

[0014] Figure 1 is the overall structural schematic diagram of the utility model;

[0015] Figure 2 is the structural schematic diagram of the utility model after removing the caster wheel;

[0016] Figure 3 is the schematic diagram of the principle of the abutting rod applying pressure to the swing frame;

[0017] Figure 4 is Figure 3 the connection cross-sectional view of the foot pedal and the sliding bracket on the outer side of the side plate in

[0018] Figure 5 is Figure 3 the enlarged schematic diagram of the clamping structure of the hook member and the hook groove in

[0019] In the figure: 1. Bolt fixing seat; 2. Side plate; 3. Caster; 4. Swing frame; 5. Torsion spring; 6. Corrugated anti-slip block; 7. First chute; 8. Sliding bracket; 9. Foot pedal; 10. Tension spring; 11. Second chute; 12. Pushing rod; 13. Positioning plate; 14. Hook groove; 15. Hinge shaft; 16. Hook member. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-5 , the present invention provides a technical solution: a foot-operated self-locking caster, including a bolt fixing seat 1, a side plate 2 and a caster 3. The left and right sides of the bottom of the bolt fixing seat 1 are fixed with side plates 2. A caster 3 is connected between the two side plates 2 through a rotating shaft. A swing frame 4 is installed outside the side plate 2, and the swing frame 4 is located above the caster 3. The swing frame 4 is rotationally connected to the side plate 2 through a torsion spring 5, and the torsion spring 5 is located on the outer surface of the top of the bearing connecting the side plate 2 and the caster 3. A corrugated anti-slip block 6 is provided on the inner wall of the top end of the swing frame 4. A first chute 7 is opened at the edge of the surface frame of the swing frame 4 facing the bolt fixing seat 1;

[0022] Sliding brackets 8 are installed at the bottom of the left and right sides of the bolt fixing seat 1. A foot pedal 9 is slidably installed inside the sliding bracket 8. The top of the foot pedal 9 is fixed to the inner top surface of the sliding bracket 8 through a tension spring 10. A vertically downward second chute 11 is opened on the side surface of the sliding bracket 8 facing the swing frame 4. One end of the foot pedal 9 is connected with a pushing rod 12, and the end of the pushing rod 12 passes through the second chute 11 and is arranged opposite to the first chute 7 at the edge of the surface frame of the swing frame 4;

[0023] A positioning plate 13 is installed on one side of the sliding bracket 8. A plurality of hook grooves 14 are arranged from top to bottom on the outer edge of the positioning plate 13. A hook member 16 is rotationally connected to the outer edge of the back of the foot pedal 9 facing the positioning plate 13 through a hinge shaft 15, and the hook member 16 is located in the hook groove 14 at the edge of the positioning plate 13.

[0024] When the foot pedal 9 moves downward in the sliding bracket 8, the pushing rod 12 at one end of the foot pedal 9 moves downward and is in the second chute 11. At this time, the swing frame 4 rotates with the torsion spring 5 as the center, and the corrugated anti-slip block 6 on the inner wall surface of the top end of the swing frame 4 closely adheres to the surface of the caster 3.

[0025] When the foot pedal 9 is pulled upward by the tension spring 10 in the sliding bracket 8 and resets, the push rod 12 moves upward with the foot pedal 9, and the end of the push rod 12 disengages from the second slide groove 11. At this time, the swing frame 4 is reset by the spring torsion force of the torsion spring 5 and swings toward the bolt fixing seat 1 with the torsion spring 5 as the fulcrum. The corrugated anti-slider 6 on the inner wall of the top of the swing frame 4 is separated from the surface of the caster 3.

[0026] The corrugated anti-sliding block 6 is made of rubber; after the corrugated surface at the bottom end of the corrugated anti-sliding block 6 contacts the surface of the caster 2, a braking effect is achieved.

[0027] When the hook member 16 rotates and sticks to the outer edge of the footrest 9 through the hinge shaft 15, the hook member 16 disengages from the hook groove 14 at the positioning plate 13. At this time, the footrest 9 is subjected to the spring tension of the tension spring 10 and returns to the sliding bracket 8.

[0028] Working principle:

[0029] The caster 2 of the utility model is installed between the two side plates 2 at the bottom of the bolt fixing seat 1, and the swing frame 4 is installed on the outside of the side plates 2, and the swing frame 4 and the side plates 2 are rotatably connected through the torsion spring 5;

[0030] Under normal conditions, the swing frame 4 is located on top of the caster 2, and the corrugated anti-slip block 6 on the inner wall of the top end of the swing frame 4 does not contact the surface of the caster 2. The caster 2 moves normally, and the hook member 16 at the end of the footrest 9 is attached to the edge surface of the footrest 9 and is not stuck in the hook groove 14.

[0031] When the caster 3 needs to be braked, the foot can be stepped on the foot pedal 9 to apply pressure, and the foot pedal 9 is displaced downward in the sliding bracket 8. One end of the foot pedal 9 is fixedly connected to the push rod 12 extending from the second slide groove, and the push rod 12 moves downward accordingly. At this time, the push rod 12 is embedded in the first slide groove 7 of the swing frame 4, and then moves downward. The swing frame 4 is subjected to pressure, with the torsion spring 5 as the fulcrum, and the top end of the swing frame 4 swings to the lower left side. At this time, the corrugated anti-sliding block 6 at the inner wall of the top end of the swing frame 4 contacts the outer surface of the caster 3, and the hook part 16 at the end of the foot pedal 9 can be manually swung, so that the hook part 16 is inserted into the hook groove 14 of the corresponding height at the side edge of the positioning plate 13. After releasing the pressure on the foot pedal 9, the hook part 16 is stuck in the hook groove 14, which plays a role in fixing the height of the foot pedal 9;

[0032] When it is necessary for the caster 3 to stop braking and move normally, pressure is applied to the foot pedal 9. Then, the hook member 16 is manually rotated through the hinge shaft 15 and pulled outwards from the hook slot 14. At this time, there is no contact structure between the foot pedal 9 and the positioning plate 13. The foot pedal 9 is pulled upward by the spring force of the tension spring 10 at the top end and moves upward to reset within the sliding bracket 8. The abutting rod 12 at one end of the foot pedal 9 then disengages upward from the first chute 7 in the surface groove of the swing frame 4. After there is no pressure from the abutting rod 12 on the top of the swing frame 4, the swing frame 4 rotates to reset under the action of the torsion spring 5, driving the swing frame 4 to rotate upward to the top outer side of the bolt fixing base 1, that is, the swing frame 4 will move to the top outer side of the caster 2. At this time, the corrugated anti-slip block 6 at the inner wall of the top end of the swing frame 4 is separated from the surface of the caster 3, and the caster 3 can roll normally.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pedal self-locking caster, comprising a bolt fixing seat (1), a side plate (2) and a caster (3), characterized in that, On the left and right sides of the bottom of the bolt fixing seat (1), side plates (2) are fixed. A caster (3) is connected between the two side plates (2) through a rotating shaft. An oscillating frame (4) is installed outside the side plate (2), and the oscillating frame (4) is located above the caster (3). The oscillating frame (4) is rotationally connected to the side plate (2) through a torsion spring (5), and the torsion spring (5) is located at the top of the bearing connecting the side plate (2) and the caster (3). A corrugated anti-slip block (6) is arranged at the inner wall of the top end of the oscillating frame (4). A first chute (7) is formed at the edge of the surface frame of the oscillating frame (4) facing the bolt fixing seat (1): Sliding brackets (8) are installed at the bottom on the left and right sides of the bolt fixing seat (1). A foot pedal (9) is slidably installed inside the sliding bracket (8). The top of the foot pedal (9) is fixed to the inner top surface of the sliding bracket (8) through a tension spring (10). A vertically downward second chute (11) is formed in the side surface of the sliding bracket (8) facing the oscillating frame (4). One end of the foot pedal (9) is connected with a pressing rod (12), and the end of the pressing rod (12) passes through the second chute (11) and is arranged opposite to the first chute (7) at the edge of the surface frame of the oscillating frame (4); A positioning plate (13) is installed on one side of the sliding bracket (8). A plurality of hook grooves (14) are arranged from top to bottom at the outer edge of the positioning plate (13). A hook member (16) is rotationally connected to the outer edge of the back of the foot pedal (9) facing the positioning plate (13) through a hinge shaft (15), and the hook member (16) is located in the hook groove (14) at the edge of the positioning plate (13).

2. The pedal self-locking caster according to claim 1, wherein: When the foot pedal (9) moves downward in the sliding bracket (8), the pressing rod (12) at one end of the foot pedal (9) moves downward and is located in the second chute (11). At this time, the oscillating frame (4) rotates around the torsion spring (5) as the center, and the corrugated anti-slip block (6) on the inner wall surface of the top end of the oscillating frame (4) closely adheres to the surface of the caster (3).

3. The pedal self-locking caster according to claim 2, wherein: When the foot pedal (9) moves upward to reset under the pulling force of the tension spring (10) in the sliding bracket (8), the pressing rod (12) moves upward following the foot pedal (9), and the end of the pressing rod (12) disengages from the second chute (11). At this time, the oscillating frame (4) is reset under the spring torque of the torsion spring (5) and swings towards the bolt fixing seat (1) with the torsion spring (5) as the center fulcrum, and the corrugated anti-slip block (6) on the inner wall of the top end of the oscillating frame (4) is separated from the surface of the caster (3).

4. The pedal - type self - locking caster according to claim 3, characterized in that: The corrugated anti-slip block (6) is made of rubber.

5. The pedal - type self - locking caster according to claim 1, wherein: When the hook member (16) rotates and adheres to the outer edge of the foot pedal (9) through the hinge shaft (15), the hook member (16) disengages from the hook groove (14) at the positioning plate (13), and the foot pedal (9) moves upward to reset under the spring pulling force of the tension spring (10).

Images