Wheel assembly and baby carriage having the same

Abstract

The present invention discloses a wheel assembly, including a wheel frame, a roller rotatably connected to the lower part of the wheel frame, the wheel frame including a connecting shaft extending in a vertical direction, a shaft sleeve capable of rotating relative to the connecting shaft being sleeved on the connecting shaft, and the wheel assembly also including a damping device for damping the rotation of the connecting shaft, the damping device including a first attracting member and a second attracting member capable of attracting each other, the first attracting member being arranged on the connecting shaft, and the second attracting member being arranged on the shaft sleeve. The damping device utilizes the attraction force to squeeze the shaft sleeve, and provides friction damping for the rotation of the connecting shaft, so as to avoid the left-right shaking of the wheel assembly during operation caused by the connecting shaft being too flexible, and improve the stability of pushing the child stroller, thereby improving the comfort of the pusher and the passenger, and the friction area between the shaft sleeve and the connecting shaft is large, the friction effect is good, and it is not easy to cause wear to the parts, so that the service life of the wheel assembly is long.

Description

Technical Field

[0001] The invention relates to a wheel assembly and a baby carriage having the same. Background Art

[0002] Universal wheels can rotate 360° around a vertical axis, so they are highly flexible. Universal wheels are generally used on the front wheels of child strollers to facilitate steering. However, because universal wheels are too flexible, the front wheels of child strollers usually shake left and right during pushing, which makes the pusher and the passenger feel very uncomfortable and also affects the service life of the universal wheels. Summary of the invention

[0003] The object of the present invention is to provide a wheel assembly which has high stability and is not prone to left-right shaking during use.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a wheel assembly, including a wheel frame, and a roller rotatably connected to the lower part of the wheel frame, the wheel frame including a connecting shaft extending in a vertical direction, the connecting shaft being provided with a shaft sleeve that can rotate relative to the connecting shaft, the wheel assembly also including a damping device for damping the rotation of the connecting shaft, the damping device including a first attracting member and a second attracting member that can attract each other, the first attracting member being arranged on the connecting shaft, and the second attracting member being arranged on the shaft sleeve.

[0005] Preferably, the first attracting member and the second attracting member attract each other through magnetic force, and both the first attracting member and the second attracting member are magnets, or one of them is made of magnetic conductive material and the other is a magnet.

[0006] Further preferably, the connecting shaft is at least partially made of magnetic conductive material, and the first attracting member is a part of the connecting shaft, or the first attracting member is fixedly connected to the connecting shaft.

[0007] Preferably, a mounting groove is provided on the shaft sleeve, and the second attraction member is fixedly disposed in the mounting groove.

[0008] Further preferably, the mounting groove is arranged on the outer side of the shaft sleeve.

[0009] Further preferably, the shaft sleeve is provided with a plurality of the mounting grooves, and the distances between each mounting groove and the first attracting member are different.

[0010] Preferably, the second attracting member is arranged on the outer periphery of the sleeve.

[0011] Preferably, the second attracting member is arranged at an axial end portion of the sleeve.

[0012] Preferably, a plurality of the second attracting members are provided.

[0013] Another object of the present invention is to provide a baby carriage which is not prone to shaking left and right when being pushed.

[0014] To achieve the above object, the technical solution adopted by the present invention is: a baby carriage, which includes a frame, and the wheel assembly described above is installed at the bottom of the frame.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the damping device utilizes the attraction force to squeeze the shaft sleeve, thereby providing friction damping for the rotation of the connecting shaft, thereby preventing the connecting shaft from being too flexible and causing the wheel assembly to shake left and right during operation, thereby improving the stability of the child stroller, thereby improving the comfort of the pusher and the passenger, and the friction area between the shaft sleeve and the connecting shaft is large, the friction effect is good, and it is not easy to cause wear to the parts, and the service life of the wheel assembly is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 is an axonometric schematic diagram of a wheel assembly;

[0017] Attached Figure 2 The isometric diagram of a wheel assembly having a shaft sleeve, wherein the second attracting member is disposed on the outer periphery of the shaft sleeve;

[0018] Attached Figure 3 A schematic isometric view of a wheel assembly having a shaft sleeve, wherein a second attracting member is disposed at an axial end of the shaft sleeve;

[0019] Attached Figure 4 This is an axonometric diagram of a baby carriage;

[0020] Among them: 1. wheel frame; 11. connecting shaft; 2. roller; 3. bushing; 31. mounting groove; 4. first attracting member; 5. second attracting member; 10. wheel assembly; 20. frame. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] See also Figures 1 to 4As shown, this embodiment provides a wheel assembly 10 and a baby carriage having the same. The wheel assembly 10 includes a wheel frame 1, a roller 2 rotatably connected to the lower part of the wheel frame 1, the wheel frame 1 includes a connecting shaft 11 extending in the vertical direction, a sleeve 3 is sleeved on the connecting shaft 11, the connecting shaft 11 and the sleeve 3 can rotate relative to each other, and the wheel assembly 10 also includes a damping device for damping the rotation of the connecting shaft 11, the damping device includes a first attracting member 4 and a second attracting member 5 that can attract each other, wherein the first attracting member 4 is arranged on the connecting shaft 11, and the second attracting member 5 is arranged on the sleeve 3. Since the first attracting member 4 and the second attracting member 5 attract each other, the friction between the sleeve 3 and the connecting shaft 11 increases, which limits the flexibility of the rotation of the connecting shaft 11, thereby preventing the wheel assembly 10 from shaking left and right, and the wheel assembly 10 is relatively stable when working. In addition, the friction area between the sleeve 3 and the connecting shaft 11 is large, the friction effect is good, and it is not easy to wear the parts, so the service life of the wheel assembly 10 is high.

[0023] Specifically, the first attraction member 4 and the second attraction member 5 attract each other through magnetic force, and both of them can be magnets, or one can be made of a magnet and the other can be made of a magnetic conductive material. The baby stroller at least includes a frame 20, and the wheel assembly 10 is arranged at the bottom of the frame. As a preferred embodiment, only the two front wheels of the baby stroller need to be the wheel assemblies 10 of the present invention, and the two rear wheels still use ordinary rollers. The baby stroller can achieve steering and has a low cost.

[0024] The magnetic conductive material includes metals such as iron, cobalt, nickel, or materials that can be attracted by magnets such as iron composite oxides. In this embodiment, the connecting shaft 11 is made of iron, and the first attracting member 4 is the connecting shaft 11; the first attracting member 4 can also be a part fixedly set on the connecting shaft 11, which is made of magnetic conductive material, and the second attracting member 5 is a magnet, and the second attracting member 5 and the connecting shaft 11 can attract each other. In some other embodiments, the first attracting member 4 can also be a part that is independent of the connecting shaft 11 and connected to the connecting shaft 11.

[0025] See also Figure 2 and Figure 3 As shown, the shaft sleeve 3 is provided with a mounting groove 31, and the second attracting member 5 is fixedly arranged in the mounting groove 31, so the installation of the second attracting member 5 is also relatively convenient, and the structure of the wheel assembly 10 is also relatively compact. In this embodiment, the mounting groove 31 is arranged on the outer side of the shaft sleeve 3, and the shaft sleeve 3 and the connecting shaft 11 are pressed against each other, which has a damping effect on the rotation of the connecting shaft 11, preventing the wheel assembly 10 from shaking left and right when pushing the baby stroller, so that the pushing of the baby stroller is more stable.

[0026] The sleeve 3 is provided with a plurality of mounting grooves 31, so a plurality of second attracting members 5 can be provided on a wheel assembly 10 to achieve different damping effects. For example, the friction between the sleeve 3 and the connecting shaft 11 can be increased by increasing the number of second attracting members 5. In certain other embodiments, only one second attracting member 5 is provided in the wheel assembly, and the distances between each mounting groove 31 and the first attracting member 4 are different. Therefore, when the second attracting member 5 is provided in different mounting grooves 31, the attraction between it and the first attracting member 4 is different. When it is necessary to increase the damping, the second attracting member 5 is installed in the mounting groove 31 closer to the first attracting member 4, and when it is necessary to reduce the damping, the second attracting member 5 is installed in the mounting groove 31 farther from the first attracting member 4. It can be seen from this that the friction between the connecting shaft 11 and the sleeve 3 of the wheel assembly 10 is adjustable, and the adjustment of the friction can be achieved by increasing or decreasing the number of the second attracting members 5, or by changing the placement position of the second attracting member 5, and both adjustment methods are extremely simple.

[0027] The second attracting member 5 can be arranged at any position of the sleeve 3. If the second attracting member 5 is arranged at the outer periphery of the sleeve 3 (see Figure 2 As shown in FIG. 1 ), the height of the wheel assembly will not be increased. Therefore, when the center of gravity of the stroller is desired to be lower, the wheel assembly 10 of this structure can be used. Figure 3 As shown in FIG. 1 , the upper part of the wheel assembly 10 is relatively slender and has a good appearance. In short, the position of the second attraction member 5 on the shaft sleeve 3 can be flexibly arranged according to the needs of the child stroller structure, so the wheel assembly 10 can be applied to strollers of different structures.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel assembly, comprising a wheel frame, and a roller rotatably connected to the lower part of the wheel frame, wherein the wheel frame comprises a connecting shaft extending in a vertical direction, and a shaft sleeve capable of rotating relative to the connecting shaft is sleeved on the connecting shaft, characterized in that: The wheel assembly further comprises a damping device for squeezing the sleeve by attraction and generating friction damping for the rotation of the connecting shaft, the damping device comprising a first attracting member and a second attracting member capable of attracting each other, the first attracting member being arranged on the connecting shaft, and the second attracting member being arranged on the sleeve, and the friction force between the sleeve and the connecting shaft is increased by the mutual attraction between the first attracting member and the second attracting member; The shaft sleeve is provided with a plurality of mounting grooves, the second attraction member is fixedly arranged in the mounting grooves, and the distances between each mounting groove and the first attraction member are different.

2. The wheel assembly according to claim 1, characterized in that: The first attracting member and the second attracting member attract each other through magnetic force. The first attracting member and the second attracting member are both magnets, or one of them is made of magnetic conductive material and the other is a magnet.

3. The wheel assembly according to claim 2, characterized in that: The connecting shaft is at least partially made of magnetic conductive material, and the first attracting member is a part of the connecting shaft, or the first attracting member is fixedly connected to the connecting shaft.

4. The wheel assembly according to claim 1, characterized in that: The mounting groove is arranged on the outer side of the shaft sleeve.

5. The wheel assembly according to claim 1, characterized in that: The second attracting member is disposed on the outer periphery of the sleeve.

6. The wheel assembly according to claim 1, characterized in that: The second attracting member is disposed at an axial end portion of the sleeve.

7. The wheel assembly according to claim 1, characterized in that: A plurality of the second attracting members are provided.

8. A baby carriage, comprising a frame, characterized in that: A wheel assembly as recited in any one of claims 1 to 7 is mounted at the bottom of the frame.

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