Double-brake mute universal trundle

Abstract

The utility model relates to the field of double-brake universal casters, in particular to a double-brake silent universal caster, which is characterized in that each group of silent wheels are rotatably arranged on the outer ring of a rolling bearing, and the high-quality rolling bearing is used, so that the wheels can stably roll, friction and noise are reduced, and a damper is vertically arranged between the two silent wheels, so that the noise is reduced. Meanwhile, under the work of the four sets of buffering devices, the damper can absorb impact and vibration between the trundle and the ground, so that noise is reduced, the trundle body is fixedly sleeved with the rubber trundle sleeve, direct contact between the trundle and the ground can be reduced, noise generated when the trundle rolls on the ground is reduced, meanwhile, the trundle body is protected, and the service life of the trundle is prolonged. The caster is simple in structure and convenient to use, the maintenance cost of the caster is reduced, external substances can be prevented from being wound on a bearing or a support of the caster through the anti-winding protection shell on the caster, noise caused by the substances wound on the caster is prevented, and therefore a quieter working or living environment is provided.

Description

Technical Field

[0001] The utility model relates to the field of double-brake universal casters, in particular to a double-brake silent universal caster. Background Art

[0002] Double brake universal caster generally refers to a caster with two brake devices that can lock the rotation and rolling of the caster at the same time. However, since the wheel body of the traditional caster is made of non-silent materials such as hard rubber, polyvinyl chloride (PVC), nylon, etc., these materials will produce greater friction and noise when in contact with the ground, and these non-silent casters may use metal balls or metal rollers, which may produce more noise when in contact with the ground, because the contact between metals will also produce friction and vibration. These noises may cause interference in a quiet environment, especially in places that need to be kept quiet (such as hospitals, offices, libraries) or in a quiet home environment at night. Using such casters in these environments may have a negative impact on surrounding work or activities, and casters that lack silent characteristics may experience friction and wear more quickly during use, requiring more frequent maintenance and replacement, increasing the maintenance cost of the equipment. Utility Model Content

[0003] The utility model aims to provide a double-brake silent universal caster.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] Provided is a double-brake silent universal caster, comprising a swivel seat for adjusting the direction of the universal caster, a double brake for locking the rotation and preventing rolling, two silent wheels, two rolling bearings, a special shaft, a soundproof frame, a damper, four buffer devices and a support plate, each set of silent wheels is rotatably arranged on the outer ring of the rolling bearing, the special shaft passes through the inner rings of the two rolling bearings and is fixedly connected to the rolling bearings, the two side plates of the soundproof frame are respectively fixedly arranged at the two ends of the special shaft, the damper is vertically arranged between the two silent wheels, and the lower hanging ring of the damper is fixedly connected to the special shaft, the upper end of the damper is fixedly connected to the support plate, and the four buffer devices are fixedly arranged between the soundproof frame and the support plate.

[0006] Furthermore, a rubber wheel sleeve is fixedly arranged on the surface of the silent wheel.

[0007] Furthermore, each set of buffer devices comprises two shock-absorbing gaskets and a pressure spring. The two shock-absorbing gaskets are respectively fixed at both ends of the pressure spring. The upper end of the spring is fixedly connected to the support plate through a spring fixing piece, and the lower end of the spring is fixedly connected to the sound insulation frame through a spring fixing piece.

[0008] Furthermore, sound-absorbing foam is fixedly arranged on the inner wall of the sound insulation frame.

[0009] Furthermore, a through hole for the damper to pass through is provided in the middle of the upper end of the sound insulation frame.

[0010] Furthermore, the surface of the bracket is provided with an annular adjustment hole for the adjustment device to slide.

[0011] Furthermore, an anti-entanglement protective shell is fixedly provided on the side of the silent wheel, and the shell is a sound-absorbing panel.

[0012] The beneficial effects of the utility model are as follows: each set of silent wheels is rotatably arranged on the outer ring of the rolling bearing, and high-quality rolling bearings are used to ensure the smooth rolling of the wheels, reduce friction and noise, and ensure the accuracy and stability of the caster installation through the inner ring of the rolling bearing and fixed connection with the rolling bearing, and the damper is vertically arranged between the two silent wheels. At the same time, under the operation of the four sets of buffer devices, the damper can absorb the impact and vibration between the caster and the ground, thereby reducing the generation of noise, and then the rubber wheel sleeve is fixedly sleeved on the wheel body, which can reduce the direct contact between the caster and the ground, thereby reducing the transmission of vibration and impact, and reducing the noise generated when the caster rolls on the ground, while protecting the wheel body and reducing the cost of equipment maintenance, and finally the anti-winding protective shell on the caster can prevent external substances from winding around the bearing or bracket of the caster, and prevent the noise caused by the substances wrapped around the caster, thereby providing a quieter working or living environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment of the utility model.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure from another perspective;

[0016] Figure 3 It is an oblique schematic diagram of the utility model;

[0017] Figure 4 It is a partial schematic diagram of the utility model;

[0018] In the figure: 1, rotating seat; 2, double brakes to prevent rolling; 3, silent wheel; 4, rolling bearing; 5, special shaft; 6, sound insulation frame; 7, damper; 8, buffer device; 9, support plate; 31, rubber wheel sleeve; 81, shock-absorbing gasket; 82, pressure spring; 61, sound-absorbing foam; 62, through hole; 32, anti-entanglement protective shell;

[0019] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods. DETAILED DESCRIPTION

[0020] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0021] Reference Figures 1 to 4 A double-brake silent universal caster shown in the figure includes a rotating seat 1 for adjusting the direction of the universal caster, a double brake 2 for locking the rotation and preventing rolling, two silent wheels 3, two rolling bearings 4, a special shaft 5, a soundproof frame 6, a damper 7, four buffer devices 8 and a support plate 9. Each group of silent wheels 3 is rotatably arranged on the outer ring of the rolling bearing 4. The wheel part adopts elastic rubber to absorb the vibration force generated by the collision between the wheel part and the ground, thereby reducing noise. The special shaft 5 passes through the inner rings of the two rolling bearings 4 and is fixedly connected to the rolling bearings 4. The special shaft 5 fits tightly with the rolling bearings 4. The two side plates of the soundproof frame 6 are respectively fixedly arranged at the two ends of the special shaft 5. The damper 7 is vertically arranged between the two silent wheels 3, and the lower hanging ring of the damper 7 is fixedly connected to the special shaft 5. The upper end of the damper 7 is fixedly connected to the support plate 9, and the four buffer devices 8 are fixedly arranged between the soundproof frame 6 and the support plate 9. Each set of silent wheels 3 is rotatably set on the outer ring of the rolling bearing 4, and high-quality rolling bearings 4 are used to ensure smooth rolling of the wheels, reduce friction and noise, and then through the inner ring of the rolling bearing 4 and fixedly connected to the rolling bearing 4, the accuracy and stability of the caster installation are ensured, and the damper 7 is vertically set between the two silent wheels 3. At the same time, under the operation of the four sets of buffer devices 8, the damper 7 can absorb the impact and vibration between the caster and the ground, thereby reducing the generation of noise.

[0022] The surface of the silent wheel 3 is fixedly provided with a rubber wheel cover 31. The rubber wheel cover 31 can reduce the direct contact between the caster and the ground, thereby reducing the transmission of vibration and impact, and further reducing the noise generated when the caster rolls on the ground, especially in occasions where a quiet environment is required, such as medical equipment or office furniture, and the rubber surface provides better grip when in contact with the ground, making it easier for the caster to travel on different ground surfaces.

[0023] Each set of buffer devices 8 includes two shock-absorbing washers 81 and a pressure spring 82. The two shock-absorbing washers 81 are fixedly arranged at both ends of the pressure spring 82, and the upper end of the spring is fixedly connected to the support plate 9 through a spring fixing member, and the lower end of the spring is fixedly connected to the sound insulation frame 6 through a spring fixing member. The buffer device 8 is formed by the fixed connection between the shock-absorbing washers 81 and the pressure spring 82. When the road surface is uneven, the shock-absorbing washers 81 can receive the vibration from the wheel body, thereby reducing the impact of these vibrations on the surrounding environment and the equipment itself, which is very beneficial for improving equipment performance, protecting structures and reducing noise.

[0024] The inner wall of the sound insulation frame 6 is fixedly provided with sound absorbing foam 61. The sound absorbing foam 61 is a porous material, usually made of polymer foam, polyurethane or similar materials. These foam structures can absorb the energy of sound waves and reduce the reflection and propagation of sound.

[0025] A through hole 62 for the damper 7 to pass through is provided in the middle of the upper end of the sound insulation frame 6. The damper 7 passes through the through hole 62, and when the wheel body needs buffering, the damper 7 can slide back and forth in the through hole 62.

[0026] The side of the silent wheel 3 is fixedly provided with an anti-entanglement protective shell 32, and the shell is a sound-absorbing board. The anti-entanglement protective shell on the caster can prevent external materials from being entangled on the bearing or bracket of the caster. The materials entangled on the caster may cause noise, which may rub against the ground or collide with the caster parts. The anti-entanglement protective shell 32 can reduce such noise and provide a quieter working or living environment.

[0027] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-brake silent universal caster, comprising a swivel seat (1) for adjusting the direction of the universal caster, and a double brake (2) for locking the rotation and preventing rolling, characterized in that: The invention also comprises two silent wheels (3), two rolling bearings (4), a special shaft (5), a soundproof frame (6), a damper (7), four buffer devices (8) and a support plate (9), each group of silent wheels (3) is rotatably arranged on the outer ring of the rolling bearing (4), the special shaft (5) passes through the inner rings of the two rolling bearings (4) and is fixedly connected to the rolling bearings (4), the two side plates of the soundproof frame (6) are respectively fixedly arranged at the two ends of the special shaft (5), the damper (7) is vertically arranged between the two silent wheels (3), and the lower hanging ring of the damper (7) is fixedly connected to the special shaft (5), the upper end of the damper (7) is fixedly connected to the support plate (9), and the four buffer devices (8) are fixedly arranged between the soundproof frame (6) and the support plate (9).

2. The double-brake silent universal caster according to claim 1, characterized in that: A rubber wheel sleeve (31) is fixedly arranged on the surface of the silent wheel (3).

3. The double-brake silent universal caster according to claim 2, characterized in that: Each set of buffer devices (8) comprises two shock-absorbing washers (81) and a pressure spring (82), wherein the two shock-absorbing washers (81) are respectively fixedly arranged at the two ends of the pressure spring (82), the upper end of the spring is fixedly connected to the support plate (9) via a spring fixing member, and the lower end of the spring is fixedly connected to the sound insulation frame (6) via a spring fixing member.

4. The double-brake silent universal caster according to claim 3, characterized in that: The inner wall of the sound insulation frame (6) is fixedly provided with sound-absorbing foam (61).

5. The double-brake silent universal caster according to claim 4, characterized in that: A through hole (62) for the damper (7) to pass through is provided in the middle of the upper end of the sound insulation frame (6).

6. The double-brake silent universal caster according to claim 5, characterized in that: An anti-entanglement protective shell (32) is fixedly arranged on the side of the silent wheel (3), and the shell is a sound-absorbing panel.

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