Brake trundle

Abstract

The utility model discloses a brake trundle which comprises a fixed seat, a movable seat rotationally connected to the lower portion of the fixed seat, a wheel rotationally connected to the movable seat and a brake device arranged on the movable seat and capable of locking the wheel. The fixed seat comprises a square plate, a small wave disc arranged below the square plate and a rivet for connecting the square plate and the small wave disc, and a limiting mechanism capable of limiting the small wave disc to rotate relative to the square plate is arranged between the square plate and the small wave disc. Therefore, when rivet connection is loosened, rotation of the small wave disc can be limited through the limiting mechanism, the situation that the direction of wheels cannot be locked is avoided, and meanwhile braking is more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a braking caster. Background Art

[0002] A caster, also known as a swivel wheel, a movable wheel or a furniture wheel, is a device installed at the bottom of an object to facilitate movement. They are usually used on furniture such as tables and chairs, as well as on devices that need to be moved, such as carts and trolleys. Existing casters generally come with a braking device for braking. For example, a patent document with the application number 201320098577.1 discloses a caster with a braking function. However, the square plate and the wave plate on this wheel are only connected by rivets. When the rivet connection becomes loose, relative rotation will occur between the square plate and the wave plate, thus affecting the braking of the wheel by the braking device. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a braking caster that can prevent rotation between the square plate and the wave plate and has more reliable braking.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A braking caster includes a fixed seat, a movable seat rotatably connected below the fixed seat, a wheel rotatably connected to the movable seat, and a braking device provided on the movable seat and capable of locking the wheel. The fixed seat includes a square plate, a small wave plate provided below the square plate, and a rivet connecting the two. A limiting mechanism is provided between the square plate and the small wave plate to limit the rotation of the small wave plate relative to the square plate.

[0006] In a preferred embodiment of the utility model, the limiting mechanism includes a clamping groove provided on the inner side of the small wave plate and a clamping protrusion provided on the inner side of the square plate and extending downward to be clamped in the clamping groove.

[0007] In a preferred embodiment of the utility model, the number of the clamping grooves and the clamping protrusions is at least two and they are evenly distributed.

[0008] In a preferred embodiment of the utility model, a groove is provided on the inner side of the square plate at the mating position with the rivet, so that after the rivet is riveted, a protrusion that can be clamped in the groove is formed on the rivet.

[0009] In a preferred embodiment of the utility model, the bottom surface of the groove is an inclined surface that gradually slopes downward from the outside to the inside.

[0010] In a preferred embodiment of the utility model, an iron wire is provided inside the wheel, and the iron wire contacts and connects with the movable seat through the outside to the inside of the wheel.

[0011] In a preferred embodiment of the present utility model, the braking device includes a brake plate hinged within the movable seat, and a pressing member hinged within the movable seat and capable of driving one end of the brake plate away from the small wave plate to abut against the wheel. A plurality of limiting grooves are provided on the outer side of the small wave plate, and an insertion piece capable of being inserted into the limiting grooves is provided at one end of the brake plate close to the small wave plate.

[0012] In a preferred embodiment of the present utility model, retaining pieces are provided on both sides of the brake plate and located on both sides of the insertion piece, and the insertion piece protrudes upward higher than the retaining pieces on both sides.

[0013] In a preferred embodiment of the present utility model, a reset spring piece capable of abutting against the movable seat is provided in the middle of the brake plate.

[0014] In a preferred embodiment of the present utility model, the pressing member includes a pressing lever.

[0015] The beneficial effect of the present utility model is that the braking caster includes a fixed seat, a movable seat, a wheel and a braking device, and the fixed seat includes a square plate, a small wave plate, and a rivet connecting the two. A limiting mechanism is provided between the square plate and the small wave plate. In this way, when the connection of the rivet becomes loose, the rotation of the small wave plate can be restricted by this limiting mechanism, preventing the wheel direction from being unable to be locked and making the braking more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of a braking caster of the present utility model;

[0017] Figure 2 is an exploded schematic view of the fixed seat in a braking caster of the present utility model;

[0018] Figure 3 is a partial cross-sectional view of a braking caster of the present utility model;

[0019] Figure 4 is a schematic view of a braking caster of the present utility model;

[0020] Figure 5 is a schematic view of the brake plate in a braking caster of the present utility model.

[0021] Reference numerals: 1, fixed seat; 2, movable seat; 3, wheel; 4, braking device; 5, limiting mechanism; 6, iron wire; 11, square plate; 111, groove; 12, small wave plate; 121, limiting groove; 13, rivet; 131, protrusion; 41, brake plate; 411, insertion piece; 412, retaining piece; 413, reset spring piece; 42, pressing member; 421, pressing lever; 51, card slot; 52, clamping protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0023] Reference Figures 1 to 5 The invention relates to a brake caster, comprising a fixed seat 1, a movable seat 2 rotatably connected to the lower part of the fixed seat 1, a wheel 3 rotatably connected to the movable seat 2, and a brake device 4 arranged on the movable seat 2 and capable of locking the wheel 3. The fixed seat 1 comprises a square plate 11, a small wave disc 12 arranged under the square plate 11, and a rivet 13 connecting the two. Although the square plate 11 and the small wave disc 12 are connected and fixed by the rivet 13, after long-term use or under the action of a large external force, the connection through the rivet 13 is not so strong, resulting in the small wave disc 12 rotating relative to the square plate 11, so that the direction of the wheel 3 cannot be locked, thereby affecting the use of the user, and the brake device 4 cannot lock the wheel 3 well. Therefore, a limiting mechanism 5 is provided between the square plate 11 and the small wave disc 12, which can limit the rotation of the small wave disc 12 relative to the square plate 11. The limiting mechanism 5 is used to limit the rotation of the small wave disc 12, so as to avoid the direction of the wheel 3 being unable to be locked, and at the same time make the braking more reliable.

[0024] In this solution, the limiting mechanism 5 includes a slot 51 provided on the inner side of the small wave disc 12, and a protrusion 52 provided on the inner side of the square plate 11 and extending downward to be clamped in the slot 51. In this way, the connection between the square plate 11 and the small wave disc 12 is tightened by the engagement of the protrusion 52 with the slot 51 and then connected and fixed by the rivet 13. In addition, when the rivet 13 is not fixed tightly, there will be no relative rotation between the two. Preferably, the number of the slots 51 and the protrusions 52 is at least two, and they are evenly distributed, so that the force between the square plate 11 and the small wave disc 12 is more balanced, thereby improving the service life.

[0025] In this solution, a groove 111 is provided on the inner side of the square plate 11 and at the position where the rivet 13 cooperates, so that after the rivet 13 is riveted, the rivet 13 will form a protrusion 131 that can be stuck in the groove 111. This improves the ability of the rivet 13 to connect and fix both the square plate 11 and the small wave plate 12. Preferably, the bottom surface of the groove 111 is an inclined surface that gradually tilts downward from the outside to the inside, so that the rivet 13 is deformed to form a protrusion 131 to be stuck in the groove 111.

[0026] In this solution, an iron wire 6 is provided in the wheel 3, and the iron wire 6 is connected to the movable seat 2 through the outer side of the wheel 3 to the inner side of the wheel 3, thereby preventing the accumulation of static electricity and improving safety.

[0027] In this solution, the braking device 4 includes a brake plate 41 hinged inside the movable seat 2, and a pressing member 42 hinged inside the movable seat 2 and capable of driving one end of the brake plate 41 away from the small wave plate 12 to abut against the wheel 3. At the same time, a number of limiting grooves 121 are provided on the outer side of the small wave plate 12, and an insertion piece 411 that can be inserted into the limiting groove 121 is provided at one end of the brake plate 41 close to the small wave plate 12. In this way, the wheel 3 is locked and its steering is fixed by the braking device 4.

[0028] Among them, retaining pieces 412 are provided on both sides of the insertion piece 411 on the brake plate 41, and the upward protrusion 131 of the insertion piece 411 is higher than the retaining pieces 412 on both sides. In this way, the retaining pieces 412 on both sides abut against the small wave plate 12 for limiting. Preferably, a return spring piece 413 that can abut against the movable seat 2 is provided in the middle of the brake plate 41. Through the return spring piece 413, the brake plate 41 can be reset after being toggled on the pressing member 42, completing the explanation. Further, the pressing member 42 includes a pressing lever 421 to facilitate pressing the pressing member 42.

[0029] Inspired by the above ideal embodiments according to the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A braking caster, comprising a fixed seat (1), a movable seat (2) rotatably connected below the fixed seat (1), a wheel (3) rotatably connected to the movable seat (2), and a braking device (4) provided on the movable seat (2) and capable of locking the wheel (3). The fixed seat (1) includes a square plate (11), a small wave plate (12) provided below the square plate (11), and a rivet (13) connecting the two. It is characterized in that, A limiting mechanism (5) for restricting the rotation of the small wave plate (12) relative to the square plate (11) is provided between the square plate (11) and the small wave plate (12).

2. The braking caster according to claim 1, characterized in that, The limiting mechanism (5) includes a clamping groove (51) provided on the inner side of the small wave plate (12), and a clamping projection (52) provided on the inner side of the square plate (11) and extending downward to be clamped in the clamping groove (51).

3. The braking caster according to claim 2, characterized in that, The number of the clamping grooves (51) and the clamping projections (52) is at least two, and they are evenly distributed.

4. A braking caster according to claim 2, wherein, A groove (111) is provided on the inner side of the square plate (11) at the mating position with the rivet (13), so that after the rivet (13) is riveted, a projection (131) that can be clamped in the groove (111) is formed on the rivet (13).

5. A braking caster according to claim 4, characterized in that, The bottom surface of the groove (111) is an inclined surface that gradually slopes downward from the outside to the inside.

6. The brake caster according to claim 1, characterized in that, A wire (6) is provided inside the wheel (3), and the wire (6) passes from the outside of the wheel (3) to the inside of the wheel (3) and is in contact connection with the movable seat (2).

7. A brake caster according to claim 1, characterized in that, The braking device (4) includes a brake plate (41) hinged inside the movable seat (2), and a pressing member (42) hinged inside the movable seat (2) and capable of driving one end of the brake plate (41) away from the small wave plate (12) to abut against the wheel (3). A plurality of limiting grooves (121) are provided on the outer side of the small wave plate (12), and an insertion piece (411) that can be inserted into the limiting grooves (121) is provided at one end of the brake plate (41) close to the small wave plate (12).

8. A brake caster according to claim 7, characterized in that, Flap pieces are provided on both sides of the brake plate (41) and located on both sides of the insertion piece (411), and the insertion piece (411) and the projection (131) are higher than the flap pieces (412) on both sides.

9. A braking caster according to claim 7, characterized in that, A return elastic piece (413) that can abut against the movable seat (2) is provided in the middle of the brake plate (41).

10. A brake caster according to claim 7, characterized in that, The pressing member (42) includes a pressing lever (421).

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