Trundle with brake axle structure

Abstract

The utility model discloses a trundle with a brake shaft structure, which comprises a roller, a brake shaft, a brake shaft, a brake shaft, a brake shaft, a brake shaft, a brake shaft, a brake shaft, a brake shaft, a brake shaft and a brake shaft. The trundle frame is connected to the side face of the idler wheel in a sleeving mode, and the idler wheel is rotationally connected to the trundle frame through a connecting shaft; and the brake shaft is movably and laterally arranged on the trundle frame in a penetrating manner, and the inner end of the brake shaft extends to the corresponding position of the clamping groove of the clamping structure. The trundle can solve the problems that the braking effect is further affected due to the facts that the wheel faces of the idler wheels of a common trundle abut against each other and the idler wheels are braked by means of friction force, slipping occurs between a braking mechanism and the idler wheels, the braking effect is unstable, and the surfaces of the idler wheels are abraded seriously and gradually smooth due to friction.

Description

Technical Field

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

[0002] The principle of common caster brake mechanisms is generally to achieve roller braking through the friction force formed by the contact with the roller wheel surface. However, this method has the problem of slippage between the brake mechanism and the roller, and the braking effect is unstable. In addition, the roller wheel surface is severely worn due to friction, and gradually becomes smooth, further affecting the braking effect, as well as the stability and safety of movement. Utility Model Content

[0003] The purpose of the utility model is to provide a caster with a brake shaft structure in order to solve the problem that the method of relying on friction to achieve roller braking in the common caster, which causes slippage between the brake mechanism and the roller, the braking effect is unstable, and the roller surface is severely worn due to friction, gradually becoming smooth, further affecting the braking effect.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a caster with a brake shaft structure, comprising:

[0005] The roller has a side surface provided with a clamping structure, and the clamping structure is provided with a plurality of axially open clamping grooves along the circumference of the roller;

[0006] A caster frame, which is sleeved on the side of the roller, and the roller is rotatably connected to the caster frame via a connecting shaft;

[0007] The brake shaft is movably arranged laterally on the caster frame, and the inner end thereof extends to the corresponding position of the clamping groove of the clamping structure.

[0008] As a further description of the above technical solution:

[0009] A sleeve is extended outwardly from the middle of the roller along the rotation axis thereof, and an I-shaped groove is formed between the sleeve and the center of the roller, and the connecting shaft is passed through the I-shaped groove.

[0010] As a further description of the above technical solution:

[0011] A bearing is pressed into the end of the I-shaped groove, and the bearing is sleeved outside the connecting shaft.

[0012] As a further description of the above technical solution:

[0013] A positioning seat is also provided in the bearing, and the connecting shaft is provided in the inner cavity of the positioning seat. The positioning seat includes a first positioning ring and a second positioning ring plugged in at the inner end, and the outer ends of the first positioning ring and the second positioning ring are provided with flanges abutting against the outer side of the bearing.

[0014] As a further description of the above technical solution:

[0015] The brake shaft is a pin or a bolt, which is plugged or screwed onto the caster frame.

[0016] As a further description of the above technical solution:

[0017] The clamping structure is a gear-shaped protrusion structure extending outwardly along the rotation axis of the roller or a gear-shaped groove extending inwardly.

[0018] In summary, due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art:

[0019] Beneficial effects:

[0020] The utility model avoids the problems of roller slippage and unstable braking effect in common wheel surface abutting brake structures by clamping the brake shaft and the clamping structure in a direction perpendicular to the rotating surface of the roller, thereby improving the locking and braking stability of the brake shaft and the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 The figure is a structural diagram of a caster with a brake shaft structure.

[0023] Figure 2 This is a partial cross-sectional view showing the positional relationship between the brake shaft and the clamping structure in a caster with a brake shaft structure.

[0024] Figure 3 A partial cross-sectional view of a roller in a caster with a brake shaft structure.

[0025] Legend:

[0026] 1. Roller; 2. Sleeve; 21. I-shaped groove; 3. Caster frame; 4. Connecting shaft; 5. Clamping structure; 6. Brake shaft; 7. Bearing; 8. First positioning ring; 81. Inner cavity; 82. Flange; 9. Second positioning ring. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0029] See also Figure 1-3 The utility model provides a technical solution: a caster with a brake shaft structure, comprising:

[0030] The roller 1 has a clamping structure 5 on its side, and the clamping structure 5 has a plurality of axially open clamping grooves along the circumference of the roller 1;

[0031] A caster frame 3 is sleeved on the side of the roller 1, and the roller 1 is rotatably connected to the caster frame 3 via a connecting shaft 4;

[0032] The brake shaft 6 is movably disposed laterally on the caster frame 3 , with its inner end extending to a corresponding position of the clamping slot of the clamping structure 5 .

[0033] A sleeve 2 is extended outward from the middle of the roller 1 along its rotation axis. The sleeve 2 and the center of the roller 1 form an I-shaped groove 21, and the connecting shaft 4 is passed through the I-shaped groove 21.

[0034] A bearing 7 is pressed into the end of the I-shaped groove 21 , and the bearing 7 is sleeved on the outside of the connecting shaft 4 , thereby reducing the rotation resistance of the roller 1 and the jamming of the caster movement.

[0035] A positioning seat is also provided within the bearing 7, and the connecting shaft 4 is provided within the inner cavity 81 of the positioning seat. The positioning seat includes a first positioning ring 8 and a second positioning ring 9 inserted at the inner end. The outer ends of the first and second positioning rings 8 and 9 are provided with flanges 82 that abut against the outer side of the bearing 7. This design is used to position the bearing 7, and the two positioning rings are connected by a snap-fit design, which facilitates efficient assembly. After the above structure is assembled, the caster frame 3 is sleeved onto the outer sides of the two positioning rings to achieve structural finalization.

[0036] The brake shaft 6 is a pin or a bolt, which is inserted or screwed on the caster frame 3. The brake shaft 6 and the clamping groove of the clamping structure 5 are clamped perpendicular to the rotating surface direction of the roller 1, thereby avoiding the problems of roller slippage and unstable braking effect in the common wheel surface abutment braking structure, and improving the locking braking stability of the brake shaft 6 and the roller 1.

[0037] The clamping structure 5 is a gear-shaped protrusion extending outwardly along the rotation axis of the roller 1 or a gear-shaped groove extending inwardly, which facilitates the clamping and braking of the roller 1 at different rotational positions.

[0038] The working principle of a caster with a brake shaft structure in this embodiment includes: when the caster needs to be braked, the cart where the caster is located is stopped, and the roller 1 is controlled to rotate so that the slot of the clamping structure 5 is initially aligned with the brake shaft 6. The brake shaft 6 is pressed inward or screwed in so that it is inserted into the outside of the slot. Then the roller 1 is rotated to cooperate with the inward movement of the brake shaft 6 to complete the full clamping connection between the brake shaft 6 and the clamping structure 5.

[0039] In summary, due to the adoption of the above technical solution, the caster with a brake shaft structure of this embodiment has the following beneficial effects compared with the prior art:

[0040] The utility model avoids the problems of roller slippage and unstable braking effect in common wheel surface abutting brake structures by clamping the brake shaft and the clamping structure in a direction perpendicular to the rotating surface of the roller, thereby improving the locking and braking stability of the brake shaft and the roller.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A caster with a brake shaft structure, characterized in that: include: The roller has a side surface provided with a clamping structure, and the clamping structure is provided with a plurality of axially open clamping grooves along the circumference of the roller; A caster frame, which is sleeved on the side of the roller, and the roller is rotatably connected to the caster frame via a connecting shaft; The brake shaft is movably arranged laterally on the caster frame, and the inner end thereof extends to the corresponding position of the clamping groove of the clamping structure.

2. The caster with a brake shaft structure according to claim 1, characterized in that: A sleeve is extended outwardly from the middle of the roller along the rotation axis thereof, and an I-shaped groove is formed between the sleeve and the center of the roller, and the connecting shaft is passed through the I-shaped groove.

3. The caster with a brake shaft structure according to claim 2, characterized in that: A bearing is pressed into the end of the I-shaped groove, and the bearing is sleeved outside the connecting shaft.

4. The caster with a brake shaft structure according to claim 3, characterized in that: A positioning seat is also provided in the bearing, and the connecting shaft is provided in the inner cavity of the positioning seat. The positioning seat includes a first positioning ring and a second positioning ring plugged in at the inner end, and the outer ends of the first positioning ring and the second positioning ring are provided with flanges abutting against the outer side of the bearing.

5. The caster with a brake shaft structure according to claim 1, characterized in that: The brake shaft is a pin or a bolt, which is plugged or screwed onto the caster frame.

6. The caster with a brake shaft structure according to claim 1, characterized in that: The clamping structure is a gear-shaped protrusion structure extending outwardly along the rotation axis of the roller or a gear-shaped groove extending inwardly.

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