A centrifugal self-locking caster

Abstract

The invention discloses a centrifugal self-locking caster, comprising a wheel seat, a wheel body is installed on the wheel seat, a plurality of arc grooves are evenly distributed inside the wheel body along the central circumference of the wheel body, an arc rod is symmetrically arranged below the arc groove, and limited ends are arranged at two ends of the arc rod, a sliding block is movably arranged in the arc rod, a centrifugal ball is movably arranged in the arc groove, a limited plate is arranged on the sliding block, and a spring body for pressing the limited plate toward the direction of the centrifugal ball is arranged outside the arc rod. When the transport equipment stops moving, the caster automatically generates friction with the wheel seat and automatically locks the caster to prevent the caster from automatically moving due to the influence of a slope or partial external force, and to prevent the transport equipment from tipping over or dumping after moving, thereby ensuring the safety of property and life. Moreover, after the transport equipment is pushed hard, the friction plate on the caster gradually disengages and slowly reduces the friction. After moving, the caster gradually enters a normal rotation state. The design is reasonable and user-friendly.

Description

Technical Field

[0001] The invention relates to a caster, in particular to a centrifugal self-locking caster. Background Art

[0002] Casters refer to wheels that are connected to the lower part of a transport device and can change directions freely. Casters can be roughly divided into fixed casters and swivel casters. Casters are important components of many transport tools. However, after existing transport devices stop moving, the casters may move automatically due to some external force or ground inclination, which will cause the transport device to automatically slide and deviate, which may cause items on the transport device to fall and cause losses to people. If used on equipment such as wheelchairs or nursing beds, it is easy for patients to follow the movement of the transport device and cause the risk of rollover. For this reason, it is necessary to provide a protective device that automatically brakes after the casters stop.

[0003] Therefore, the existing casters need to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide a centrifugal self-locking caster, which can improve the safety of the caster, prevent the transport device from automatically moving after stopping, and reduce damage and human injury.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] A centrifugal self-locking caster comprises a wheel seat, wherein the wheel seat is provided with a wheel body, the interior of the wheel body is evenly distributed with a plurality of arc grooves along the central circumference of the wheel body, an arc rod is symmetrically arranged below the arc groove, and limited ends are arranged at two ends of the arc rod, a sliding block is movably arranged in the arc rod, a centrifugal ball is movably arranged in the arc groove, a limited plate is arranged on the sliding block, the outer sleeve of the arc rod is provided with a spring body for pressing the limit plate toward the direction of the centrifugal ball, a brake pad receiving groove is arranged on one side of the arc groove, a transverse through hole is arranged between the brake pad receiving groove and a corresponding one of the arc grooves, a pressing rod is movably arranged in the transverse through hole, a brake pad is arranged at the outer end of the pressing rod, and a pressing mechanism for pressing the brake pad toward the surface of the brake pad receiving groove is arranged between the brake pad and the brake pad receiving groove.

[0007] Furthermore, the wheel seat includes an upper mounting plate, side plates are arranged on both sides of the upper mounting plate, and a wheel axle is connected between the two side plates.

[0008] Furthermore, the arc center of the arc rod and the arc center of the arc groove are at the same position.

[0009] Furthermore, the inner wall of the limiting plate can be arranged to fit the outer surface of the centrifugal ball, and the limiting plate is arranged in a "scoop shape".

[0010] Furthermore, a pressing portion is provided at the inner end of the pressing rod, and the surface of the pressing portion is spherical.

[0011] Furthermore, the pressing mechanism includes an axle seat arranged in the arc groove, the brake pad is provided with a guide shaft passing through the axle seat, the guide shaft outer sleeve is provided with a return spring, one end of the return spring is pressed against the inner wall of the arc groove, and the other end is pressed against the surface of the axle seat.

[0012] Furthermore, a first friction plate is arranged on the inner wall of the side plate, and a second friction plate is arranged on the surface of the brake plate. The first friction plate is arranged in an arc shape and is concentric with the wheel body, and the second friction plate is arranged in an arc shape and is concentric with the wheel body.

[0013] Furthermore, the surfaces of the first friction plate and the second friction plate are respectively provided with concave-convex patterns.

[0014] Furthermore, the centrifugal ball is made of metal material.

[0015] Furthermore, the elastic force of the spring body is greater than the elastic force of the return spring.

[0016] In summary, the present invention has the following beneficial effects compared with the prior art:

[0017] The present invention solves the shortcomings of existing casters. Through the structural setting of the present invention, the following advantages are possessed: when the transport equipment stops moving, the caster automatically generates friction with the wheel seat, automatically locks the caster, and prevents the caster from automatically moving due to the influence of a slope or some external force, and prevents the transport equipment from tipping over or falling over after moving, thereby ensuring the safety of property and life; and after the transport equipment is pushed hard, the friction plate on the caster gradually disengages, slowly reducing the friction force, and after moving, the caster gradually enters a normal rotation state; the design is reasonable, user-friendly, and the structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 for Figure 2 Section view along line AA;

[0021] Figure 4 for Figure 3 A partial enlarged view of point C;

[0022] Figure 5 for Figure 3 Sectional view along line BB;

[0023] Figure 6 It is one of the three-dimensional diagrams of parts of the present invention;

[0024] Figure 7 It is the second of the parts stereograms of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-7 The present invention provides

[0027] A centrifugal self-locking caster, one embodiment of which is as follows: comprising a wheel seat 1, a wheel body 2 is mounted on the wheel seat 1, a plurality of arc grooves 3 are evenly distributed inside the wheel body 2 along the central circumference of the wheel body 2, arc rods 9 are symmetrically arranged below the arc grooves 3, and two arc rods 9 are provided with limited end 10 at their ends, a slider 18 is movably arranged inside the arc rod 9, a centrifugal ball 4 is movably arranged inside the arc groove 3, a limited plate 11 is arranged on the slider 18, and an outer sleeve of the arc rod 9 is provided with a The limit plate 11 presses the spring body 12 toward the centrifugal ball 4, a brake pad receiving groove 14 is provided on one side of the arc groove 3, a transverse through hole 16 is provided between the brake pad receiving groove 14 and a corresponding arc groove 3, a pressing rod 17 is movably provided in the transverse through hole 16, a brake pad 6 is provided at the outer end of the pressing rod 17, and a pressing mechanism 7 for pressing the brake pad 6 toward the surface of the brake pad receiving groove 14 is provided between the brake pad 6 and the brake pad receiving groove 14;

[0028] The working principle of the above structure is:

[0029] When in use, the wheel seat 1 is installed at the bottom of the transportation equipment. When the wheel body 2 stops rotating, the spring bodies 12 on both sides press the slider 18, and the slider 18 moves along the arc rod 9 toward the centrifugal ball 4. At this time, the limit plates 11 on both sides push the centrifugal ball 4 to the middle position of the corresponding arc groove 3, and the centrifugal ball 4 pushes the pressing rod 17 outward. At this time, the brake pad 6 fits against the side wall of the wheel seat 1, increasing the friction between the wheel seat 1 and the wheel body 2, so that the wheel body 2 cannot move when the external force is less than that, thereby improving the installability and preventing the transportation equipment from moving automatically.

[0030] When moving, the transport equipment is pushed so that the pushing force is greater than the friction force and the vehicle is unlocked. At this time, the wheel body 2 rotates to drive the transport equipment to move. During the movement, the centrifugal ball 4 rotates around the center of the wheel body 2 and is gradually pressed toward one side of the arc groove 3 under the action of centrifugal force. The centrifugal ball 4 breaks away from the pressing rod 17. At this time, the pressing rod 17 drives the brake pad 6 to be stored in the brake pad storage groove 14 under the action of the pressing mechanism 7. The brake pad 6 gradually breaks away from the side wall of the wheel seat 1, and the wheel body 2 gradually moves to a normal rotation state, thereby protecting the transport equipment after it stops moving.

[0031] Another embodiment includes a wheel seat 1, on which a wheel body 2 is mounted, characterized in that a plurality of arc grooves 3 are evenly distributed inside the wheel body 2 along the central circumference of the wheel body 2, a centrifugal ball 4 is arranged in the arc groove 3, an elastic mechanism 5 for keeping the centrifugal ball 4 in the middle position of the arc groove 3 is arranged between the centrifugal ball 4 and the arc groove 3, a brake pad 6 capable of moving laterally is arranged on the surface of the wheel body 2 on one side of the arc groove 3, and a top pressing portion 8 for contacting the centrifugal ball 4 is arranged at the inner end of the brake pad 6.

[0032] The wheel seat 1 of the present invention comprises an upper mounting plate 101, side plates 102 are arranged on both sides of the upper mounting plate 101, and a wheel axle 103 is connected between the two side plates 102;

[0033] Working principle: The wheel seat 1 is installed on the transport equipment. When the wheel body 2 stops moving, the elastic force of the elastic mechanism 5 makes the centrifugal ball 4 be located at the center of the arc groove 3. At this time, the surface of the centrifugal ball 4 presses the pressing part 8, and the pressing part 8 pushes outward. The pressing part 8 drives the brake pad 6 to move outward. The brake pad 6 is close to the side wall of the wheel seat 1, increasing friction, so that the wheel body 2 stops rotating, and the purpose of preventing the transport equipment from moving automatically is achieved;

[0034] People use external force to push the transport equipment, forcing the wheel body 2 to rotate. When the rotation speed of the wheel body 2 becomes faster and faster, the centrifugal ball 4 rotates around the center of the wheel body 2 and gradually deviates to one side of the arc groove 3. At this time, the centrifugal ball 4 breaks away from the top pressure part 8, and the brake shoe 6 moves closer to the side wall of the wheel body 2 under the pressure of the elastic mechanism 5. The brake shoe 6 breaks away from the side wall of the wheel seat 1, so that the wheel body 2 gradually rotates normally. The design is reasonable and the use is safer.

[0035] In the present invention, a pressing mechanism 7 for pressing the brake pad 6 against the surface of the wheel body 2 is provided between the brake pad 6 and the wheel body 2 .

[0036] The inner wall of the side plate 102 of the present invention is provided with a first friction plate 100 , and the surface of the brake plate 6 is provided with a second friction plate 200 .

[0037] The first friction plate 100 and the second friction plate 200 of the present invention are made of rubber material.

[0038] The centrifugal ball 4 of the present invention is made of metal material.

[0039] In the present invention, the first friction plate 100 and the second friction plate 200 are arranged in an arc shape, and the arc center of the first friction plate 100 and the arc center of the second friction plate 200 are arranged concentrically.

[0040] The wheel seat 1 of the present invention comprises an upper mounting plate 101 , side plates 102 are arranged on both sides of the upper mounting plate 101 , and a wheel axle 103 is connected between the two side plates 102 .

[0041] The arc center of the arc rod 9 of the present invention is at the same position as the arc center of the arc groove 3 .

[0042] The inner wall of the limiting plate 11 of the present invention can be arranged in close contact with the outer surface of the centrifugal ball 4, and the limiting plate 11 is arranged in a "scoop shape".

[0043] The inner end of the pressing rod 17 of the present invention is provided with a pressing portion 8, and the surface of the pressing portion 8 is spherical.

[0044] The pressing mechanism 7 of the present invention includes an axle seat 701 arranged in the arc groove 3, and the brake pad 6 is provided with a guide shaft 702 passing through the axle seat 701. The guide shaft 702 is outer-circuited with a return spring 703, and one end of the return spring 703 is pressed against the inner wall of the arc groove 3, and the other end is pressed against the surface of the axle seat 701.

[0045] The inner wall of the side plate 102 of the present invention is provided with a first friction plate 100, and the surface of the brake plate 6 is provided with a second friction plate 200. The first friction plate 100 is arranged in an arc shape and is concentric with the wheel body 2, and the second friction plate 200 is arranged in an arc shape and is concentric with the wheel body 2.

[0046] The first friction plate 100 and the second friction plate 200 of the present invention are each provided with concavo-convex patterns 300 on their surfaces.

[0047] The centrifugal ball 4 of the present invention is made of metal material.

[0048] The elastic force of the spring body 12 of the present invention is greater than the elastic force of the return spring 703 .

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A centrifugal self-locking caster, comprising a wheel seat (1), a wheel body (2) being mounted on the wheel seat (1), characterized in that: A plurality of arcuate grooves (3) are evenly distributed inside the wheel body (2) along the central circumference of the wheel body (2), arcuate rods (9) are symmetrically arranged below the arcuate grooves (3), and two end portions of the arcuate rods (9) are provided with limit ends (10), a slider (18) is movably arranged outside the arcuate rod (9), a centrifugal ball (4) is movably arranged inside the arcuate groove (3), a limit plate (11) is arranged on the slider (18), and a member for pressing the limit plate (11) toward the centrifugal ball (4) is provided on the outer cover of the arcuate rod (9). A spring body (12) is provided, a brake pad receiving groove (14) is provided on one side of the arc groove (3), a transverse through hole (16) is provided between the brake pad receiving groove (14) and a corresponding one of the arc grooves (3), a pressing rod (17) is movably provided in the transverse through hole (16), a brake pad (6) is provided at the outer end of the pressing rod (17), and a pressing mechanism (7) for pressing the brake pad (6) against the surface of the brake pad receiving groove (14) is provided between the brake pad (6) and the brake pad receiving groove (14).

2. The centrifugal self-locking caster according to claim 1, characterized in that: The wheel seat (1) comprises an upper mounting plate (101), side plates (102) are arranged on both sides of the upper mounting plate (101), and a wheel axle (103) is connected between the two side plates (102).

3. The centrifugal self-locking caster according to claim 1, characterized in that: The arc center of the arc rod (9) and the arc center of the arc groove (3) are at the same position.

4. The centrifugal self-locking caster according to claim 1, characterized in that: The inner wall of the limiting plate (11) can be arranged in contact with the outer surface of the centrifugal ball (4), and the limiting plate (11) is arranged in a "scoop-shaped" shape.

5. The centrifugal self-locking caster according to claim 1, characterized in that: The inner end of the pressing rod (17) is provided with a pressing portion (8), and the surface of the pressing portion (8) is spherical.

6. The centrifugal self-locking caster according to claim 1, characterized in that: The pressing mechanism (7) comprises a shaft seat (701) arranged in the arc groove (3); the brake pad (6) is provided with a guide shaft (702) passing through the shaft seat (701); a return spring (703) is provided on the outer sleeve of the guide shaft (702); one end of the return spring (703) is pressed against the inner wall of the arc groove (3), and the other end is pressed against the surface of the shaft seat (701).

7. The centrifugal self-locking caster according to claim 2, characterized in that: A first friction plate (100) is arranged on the inner wall of the side plate (102), and a second friction plate (200) is arranged on the surface of the brake plate (6); the first friction plate (100) is arranged in an arc shape and is arranged concentrically with the wheel body (2), and the second friction plate (200) is arranged in an arc shape and is arranged concentrically with the wheel body (2).

8. The centrifugal self-locking caster according to claim 7, characterized in that: The first friction plate (100) and the second friction plate (200) are each provided with concave-convex patterns (300) on their surfaces.

9. The centrifugal self-locking caster according to claim 1, characterized in that: The centrifugal ball (4) is made of metal material.

10. The centrifugal self-locking caster according to claim 6, characterized in that: The elastic force of the spring body (12) is greater than the elastic force of the return spring (703).

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