Caster for medical equipment
By adopting side-by-side dual bearing structure and internal airbag buffering system in casters for medical equipment, the problem of insufficient noise and shock absorption performance is solved, and a more stable, silent and efficient shock absorption effect is achieved.
Patent Information
- Application Number
- CN202421311340.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The requirements for noise and shock absorption of casters for medical equipment have not been effectively met, and the prior art is difficult to achieve higher performance in these two aspects.
A caster including a caster bracket, bearing mounting cylinder, dual bearing structure, airbag and wear-resistant sleeve is designed. Through a side-by-side dual bearing structure and an internal airbag buffer system, the stable rotation and shock absorption effect of the caster is achieved.
It achieves more stable and flexible rotation and significant silent effect, while greatly improving the shock absorption performance of casters, which is suitable for use in medical equipment.
Smart Images
Figure CN222360806U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casters, in particular to a caster for medical equipment. Background Art
[0002] Casters include movable casters and fixed casters. Movable casters, also called universal wheels, have a structure that allows 360-degree rotation; fixed casters, also called fixed casters, have no rotating structure and cannot turn. Casters can be equipped with brakes according to the needs of use to become brake casters. Casters have a wide range of applications, and the requirements for casters in different use environments are also different. For example, casters used on medical equipment have relatively high requirements for noise and shock absorption. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a caster for medical equipment with good shock absorption performance and silence.
[0004] To this end, the technical solution of the utility model is: a caster for medical equipment, including a caster bracket, a caster and a mounting frame, a bearing mounting cylinder is provided above the caster bracket, and two bearings arranged up and down are provided in the bearing mounting cylinder; the mounting frame includes a connecting shaft, the connecting shaft extends into the bearing mounting cylinder, and rotates with the caster bracket through two bearings; the caster is rotatably installed below the caster bracket, the caster includes a frame, an airbag and a wear-resistant sleeve, the frame is provided with a mounting groove on the circumference, the airbag is placed in the mounting groove, and the wear-resistant sleeve is sleeved on the outside of the airbag.
[0005] On the basis of the above scheme and as a preferred scheme of the above scheme: an annular step surface is provided in the bearing mounting cylinder, and the first bearing and the second bearing are placed above the annular step surface; a pressure ring is also provided above the bearing mounting cylinder, the pressure ring is interference fit with the bearing mounting cylinder, and is placed above the first bearing.
[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: a limiting end is provided at the bottom of the connecting shaft, and the connecting shaft passes through the second bearing, the first bearing and the pressure ring in sequence.
[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: a mounting hole is provided in the middle of the skeleton, and it is installed on the caster bracket through a first fixed axis; a third bearing and a fourth bearing are provided in the mounting hole, and the skeleton rotates with the first fixed axis through the third bearing and the fourth bearing.
[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the wear-resistant sleeve is made of polyurethane, and the wear-resistant sleeve is fixed at the notch of the installation groove and fits tightly with the airbag.
[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the caster bracket is made of plastic material, a mounting surface is provided under the caster bracket, and the casters are rotatably mounted on the mounting surfaces on both sides.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] 1. A double-bearing structure is arranged side by side between the caster bracket and the mounting frame, and the gap between the double bearings is controlled by the depth of the pressing ring, so that the rotation between the caster bracket and the mounting frame is more stable, flexible, and has a good mute effect.
[0012] 2. A double bearing structure is also arranged between the caster and the caster bracket. The third bearing and the fourth bearing can make the caster rotate more flexibly and smoothly without causing noise.
[0013] 3. Adding air bags inside the casters can provide buffering and shock absorption, so that the casters can achieve shock absorption when they are obstructed in all directions. This increases the range of the shock absorption force source and greatly enhances the shock absorption effect of the casters. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 It is a structural sectional view of the utility model;
[0016] Figure 3 It is a structural sectional view of the caster of the utility model.
[0017] Marked in the figure are: caster bracket 1, bearing mounting cylinder 11, annular step surface 12, pressure ring 13, mounting surface 14, caster 2, frame 21, airbag 22, wear-resistant sleeve 23, mounting groove 24, mounting hole 25, first bearing 31, second bearing 32, third bearing 33, fourth bearing 34, connecting shaft 4, limit end 41, first fixed shaft 5. DETAILED DESCRIPTION
[0018] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.
[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.
[0020] See the attached drawings. The caster for medical equipment described in this embodiment includes a caster bracket 1, a caster 2 and a mounting frame. A bearing mounting cylinder 11 is provided above the caster bracket 1, and a first bearing 31 and a second bearing 32 are arranged in an up-and-down arrangement in the bearing mounting cylinder 11; an annular step surface 12 is provided in the bearing mounting cylinder 11, and the first bearing 31 and the second bearing 32 are placed above the annular step surface 12; a pressure ring 13 is also provided above the bearing mounting cylinder 11, and the pressure ring 13 is interference-fitted with the bearing mounting cylinder 11 and is placed above the first bearing 31. A double-bearing structure arranged side by side is provided between the caster bracket 1 and the mounting frame, and the gap between the double bearings is controlled by the depth of the pressure ring 13, so that the rotation between the caster bracket 1 and the mounting frame is more stable and flexible, and the mute effect is good.
[0021] The mounting frame includes a connecting shaft 4, which extends into the bearing mounting cylinder 11 and rotates with the caster bracket 1 through the first bearing 31 and the second bearing 32; a limiting end 41 is provided at the bottom of the connecting shaft 4, and the connecting shaft 4 passes through the second bearing 32, the first bearing 31 and the pressing ring 13 in sequence. The limiting end 41 can prevent the connecting shaft 4 from falling out, and the connecting shaft 4 can be provided with an external thread to be directly connected to the medical device, or it can be installed on the mounting surface and fixed to the medical device through the assembly hole on the mounting surface.
[0022] The caster bracket 1 is made of plastic material, which is not easily corroded; a mounting surface 14 is provided below the caster bracket 1, and the casters 2 are rotatably mounted in the mounting surfaces 14 on both sides. The mounting surfaces 14 fit most parts of the casters 2 to reduce dust entry.
[0023] The caster 2 is rotatably mounted below the caster bracket 1. The caster 2 includes a frame 21, an airbag 22 and a wear-resistant sleeve 23. A mounting groove 24 is provided on the circumference of the frame 21. The airbag 22 is placed in the mounting groove 24, and the wear-resistant sleeve 23 is sleeved on the outside of the airbag 22. The wear-resistant sleeve 23 is made of polyurethane. The wear-resistant sleeve 23 is fixed at the notch of the mounting groove 24 and fits tightly with the airbag 22. Adding the airbag 22 inside the caster 2 can provide buffering and shock absorption, so that the caster 2 can achieve a shock absorption effect when it is obstructed in all directions, which increases the range of the shock absorption force source and greatly enhances the shock absorption effect of the caster.
[0024] The frame 21 is provided with a mounting hole 25 in the middle, and is mounted on the mounting surfaces 14 on both sides of the caster bracket 1 through the first fixed shaft 5; the mounting hole 25 is provided with a third bearing 33 and a fourth bearing 34, and the frame 21 is rotatably matched with the first fixed shaft 5 through the third bearing 33 and the fourth bearing 34. A double bearing structure is also provided between the caster 2 and the caster bracket 1, and the third bearing 33 and the fourth bearing 34 can make the caster rotate more flexibly and stably, and less likely to produce noise.
[0025] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A caster for medical equipment, comprising a caster bracket, a caster and a mounting frame, characterized in that: A bearing mounting cylinder is provided above the caster bracket, and two bearings arranged up and down are provided in the bearing mounting cylinder; the mounting frame includes a connecting shaft, the connecting shaft extends into the bearing mounting cylinder, and is rotatably matched with the caster bracket through two bearings; the caster is rotatably installed below the caster bracket, and the caster includes a frame, an airbag and a wear-resistant sleeve, and a mounting groove is provided on the circumference of the frame, the airbag is placed in the mounting groove, and the wear-resistant sleeve is sleeved on the outside of the airbag.
2. A caster for medical equipment according to claim 1, characterized in that: An annular step surface is arranged in the bearing installation cylinder, and the first bearing and the second bearing are placed above the annular step surface; a pressure ring is also arranged above the bearing installation cylinder, which has an interference fit with the bearing installation cylinder and is placed above the first bearing.
3. A caster for medical equipment according to claim 2, characterized in that: A limiting end is provided at the bottom of the connecting shaft, and the connecting shaft passes through the second bearing, the first bearing and the pressure ring in sequence.
4. A caster for medical equipment according to claim 1, characterized in that: The frame is provided with a mounting hole in the middle and is mounted on the caster bracket through a first fixed shaft; a third bearing and a fourth bearing are provided in the mounting hole, and the frame is rotatably matched with the first fixed shaft through the third bearing and the fourth bearing.
5. The caster for medical equipment according to claim 1, characterized in that: The wear-resistant sleeve is made of polyurethane and is fixed at the notch of the installation slot to fit tightly with the airbag.
6. A caster for medical equipment according to claim 1, characterized in that: The caster bracket is made of plastic material, and a mounting surface is provided below the caster bracket. The casters are rotatably mounted on the mounting surfaces on both sides.