Wheel assembly

Abstract

A wheel assembly, suitable for mounting on a vehicle frame, includes a wheel rim unit and an axle unit. The wheel rim unit includes a hub portion surrounding an axis. The axle unit includes an axle passing through the hub portion along the axis, and an anti-detachment plate disposed on the wheel rim unit and movable in the direction of gravity, sleeved on the axle. The axle has an annular groove formed on its outer circumferential surface. The anti-detachment plate is movable relative to the axle between a centered position and an anti-detachment position. In the centered position, the anti-detachment plate is centered on the axis and contacts the outer circumferential surface; in the anti-detachment position, the anti-detachment plate is offset from the axis and engaged with the annular groove. Thus, by using the anti-detachment plate to block the axle, preventing the axle from detaching from the hub portion, the ease and smoothness of installation can be improved.

Description

Technical Field

[0001] This utility model relates to a wheel assembly device, and more particularly to a wheel assembly device suitable for installation on a vehicle frame. Background Technology

[0002] See Figure 1 This describes a known quick-release structure 1 disclosed in Taiwan Patent No. TWM609457U, used to mount a wheel 21 to an axle 221 of a vehicle frame 22. The structure includes a wheel hub 11 for mounting the wheel 21, a brake disc 12 mounted on the wheel hub 11, and a spindle unit 13. The spindle unit 13 is detachably connected to the axle 221 via the wheel housing 11 along an axial direction. Therefore, when the wheel 21 needs to be removed or replaced, simply pull the spindle unit 13 to completely detach it from the axle 221, thus removing the wheel 21 from the vehicle frame 22.

[0003] However, when the spindle unit 13 is pulled, because the direction of the force applied is the same as the direction of the spindle unit 13 through the hub 11, the spindle unit 13 can easily detach from the shaft 221 and the hub 11 under the action of external force.

[0004] Therefore, when reinstalling the quick-release structure 1, one hand needs to hold the wheel hub 11 and align it with the axle 221, while the other hand needs to hold the spindle unit 13 and align it with the wheel hub 11. Since wheel assemblies with brake discs 12 are typically quite large, the relative positions of the brake disc 12 and the frame 22, coupled with both hands already holding the wheel hub 11 and the spindle unit 13, and the lack of other assistants or tools to help align the axle 221 with the wheel hub 11, result in difficulties in alignment and inconvenience in operation. Utility Model Content

[0005] The purpose of this invention is to provide a wheel assembly device that can improve the ease and smoothness of installation.

[0006] The wheel assembly device of this utility model is suitable for installation on a vehicle frame and includes a wheel rim unit and an axle unit.

[0007] The wheel frame unit includes a hub portion surrounding the axis.

[0008] The axle unit includes an axle passing through the hub portion along the axis, and an anti-detachment plate disposed on the wheel frame unit and movable along the direction of gravity, sleeved on the axle. The axle is adapted to be connected to the frame and has an annular groove formed on its outer circumferential surface. The anti-detachment plate is movable relative to the axle between a centered position and an anti-detachment position. In the centered position, the anti-detachment plate is centered on the axis and contacts the outer circumferential surface. In the anti-detachment position, the anti-detachment plate is deviated from the axis and engaged in the annular groove.

[0009] The wheel assembly of this utility model further includes a limiting portion adjacent to one end for abutting against the anti-detachment plate. The anti-detachment plate has a first end face for blocking the limiting portion and a second end face opposite to the first end face for abutting against the wheel hub.

[0010] The wheel assembly of this utility model further includes a connecting section adjacent to the other end and suitable for connecting the frame, and an extension section connecting the limiting part and the connecting section. The extension section has an outer peripheral surface, a blocking surface extending from the outer peripheral surface in a direction perpendicular to the axis, and a guide slope surface spaced from the blocking surface in a direction along the axis and jointly defining the annular groove with the blocking surface. The blocking surface is used to abut against the anti-detachment piece located at the anti-detachment position, and the guide slope surface is used to guide the anti-detachment piece to move from the center position to the anti-detachment position.

[0011] The wheel assembly device of this utility model has a disc-shaped washer with a central portion adjacent to the axis and a peripheral portion surrounding the central portion. The thickness of the central portion may be the same as or different from the thickness of the peripheral portion.

[0012] The wheel assembly device of this utility model includes a wheel frame unit that further includes a stop portion surrounding the axis and defining an opening. The stop portion is spaced apart from one side of the wheel hub portion along the direction of the axis and defines an annular chamber with the wheel hub portion. The axle passes through the wheel hub portion through the opening. The anti-detachment piece is inserted into the annular chamber and is blocked by the wheel hub portion and the stop portion along the direction of the axis.

[0013] In the wheel assembly device of this utility model, the stop part and the wheel hub part are integrally formed.

[0014] The wheel assembly device of this utility model further includes a decorative cover connected to the hub portion of the wheel frame unit, the decorative cover including the stop portion.

[0015] The wheel assembly device of this utility model further includes a brake disc, which is mounted on the wheel frame unit and located on the side opposite to the stop portion of the wheel hub.

[0016] The beneficial effect of this utility model is that the anti-detachment piece blocks the shaft, preventing the shaft from detaching from the hub, thereby improving the ease and smoothness of installation. Attached Figure Description

[0017] Other features and effects of this utility model will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a cross-sectional view illustrating a known quick-release structure disclosed in Taiwan Patent No. TWM609457U.

[0019] Figure 2 This is a front view schematic diagram illustrating an embodiment of the wheel assembly device of this utility model mounted on a vehicle frame;

[0020] Figure 3 This is a cross-sectional schematic diagram of the embodiment and the vehicle frame;

[0021] Figure 4 This is an exploded perspective view of the embodiment described above;

[0022] Figure 5 This is a perspective view of the embodiment described;

[0023] Figure 6 This is a partial enlarged cross-sectional view, illustrating that the anti-detachment sheet of the embodiment is located in the center position;

[0024] Figure 7 It is similar to Figure 6 A partially enlarged cross-sectional view, but the anti-detachment tab of the embodiment is located in the anti-detachment position; and

[0025] Figure 8 It is similar to Figure 6 The enlarged cross-sectional view shows a portion of the wheel hub, but the stop portion and the wheel hub portion of the embodiment are integrally formed. Detailed Implementation

[0026] See Figure 2 and Figure 3 This utility model provides an embodiment of a wheel assembly device suitable for installation on a vehicle frame 3. The vehicle frame 3 can be, but is not limited to, a baby stroller, pet stroller, trailer, or bicycle. The wheel assembly device includes a wheel rim unit 4, a cover 5, a brake disc 6, and an axle unit 7.

[0027] The wheel rim unit 4 includes a hub portion 41 that surrounds an axis X and defines an axle hole 40, a wheel rim portion 42 that surrounds the hub portion 41 and is connected to the hub portion 41, a tire 43 that is fitted onto the wheel rim portion 42, and two bearings 44 that are mounted on the hub portion 41 and located at both ends of the axle hole 40.

[0028] The decorative cover 5 is connected to the hub portion 41 of the wheel frame unit 4, and includes a stop portion 51 that defines an opening 50 around the axis X and is spaced apart from one side of the hub portion 41 along the direction of the axis X. The stop portion 51 and the hub portion 41 define an annular chamber 510 (see figure). Figure 6 ).

[0029] The brake disc 6 is mounted on the wheel frame unit 4 and is located on the opposite side of the hub portion 41 from the stop portion 51.

[0030] See Figure 3 , Figure 4 , Figure 5 and Figure 6 The shaft unit 7 includes a shaft 71 and an anti-detachment piece 72.

[0031] The axle 71 passes through the axle hole 40 of the hub portion 41 along the direction of the axis X through the opening 50 of the cover 5 and is disposed between the bearings 44. It has a limiting portion 711 adjacent to one end and facing the hub portion 41, a connecting section 712 adjacent to the other end and adapted to connect the frame 3, and an extension section 713 connecting the limiting portion 711 and the connecting section 712. The extension section 713 has an outer peripheral surface 714, a blocking surface 715 extending from the outer peripheral surface 714 in a direction perpendicular to the axis X, and a guide slope surface 716 spaced from the blocking surface 715 along the direction of the axis X and defining an annular groove 710 together with the blocking surface 715.

[0032] The anti-detachment piece 72 is movable along a gravity direction Z substantially perpendicular to the axis X, sleeved on the extension 713 of the shaft 71 and passing through the annular chamber 510. It has a first end face 721 that can block the shaft 71, and a second end face 722 opposite to the first end face 721 for abutting against the hub portion 41. In this way, the anti-detachment piece 72 is blocked along the gravity direction Z by the extension 713 of the shaft 71, and blocked along the axis X by the limiting portion 711 and the stop portion 51 of the cover 5, and thus confined within the annular chamber 510.

[0033] In this embodiment, the anti-detachment piece 72 is a disc-shaped washer, and also has a thicker central portion 723 adjacent to the axis X, and a thinner peripheral portion 724 surrounding the central portion 723. The central portion 723 can generate a spring force that moves the axis 71 in the opposite direction to the frame 3, thereby increasing the stability during assembly.

[0034] It should be noted that the thickness of the middle portion 723 of the anti-detachment sheet 72 is not limited to being greater than that of the outer portion 724. In other variations of this embodiment, the thickness of the middle portion 723 may be the same as or less than that of the outer portion 724, but is not limited thereto.

[0035] See Figure 3 , Figure 6 and Figure 7 The anti-detachment piece 72 can be in a centered position relative to the axis 71 (e.g., Figure 6 ) and a shaving prevention position (such as Figure 7 The anti-detachment piece 72 moves between the axes. In the centered position, the anti-detachment piece 72 is centered on the axis X and contacts the outer peripheral surface 714 of the shaft 71. In the anti-detachment position, the anti-detachment piece 72 deviates from the axis X and engages with the annular groove 710.

[0036] When the wheel assembly of this utility model is installed on the frame 3 and the anti-detachment plate 72 is located in the center position, the anti-detachment plate 72 is blocked by the wheel hub 41 and the stop portion 51 of the cover 5, and cannot detach from the wheel frame unit 4 along the direction of the axis X. It is also forced against the wheel hub 41 and the outer peripheral surface 714 of the axle 71 by the limiting portion 711 of the axle 71.

[0037] When disassembling the wheel assembly of this utility model, simply apply force along the direction of the axis X to pull the axle 71, causing the axle 71 to move in the direction of the axis X in the opposite direction to the frame 3, until the connecting section 712 of the axle 71 disengages from the frame 3, and the wheel assembly of this utility model can be removed from the frame 3.

[0038] During the pulling of the shaft 71, if the shaft 71 moves relative to the hub portion 41 along the axis X, when the shaft 71 moves to a position where the guide slope 716 is opposite the anti-detachment piece 72, the anti-detachment piece 72 will gradually deviate from the axis X from its central position along the guide slope 716 until it slides into the annular groove 710 along the direction of gravity Z and is located in the anti-detachment position. At this time, the pulled-out shaft 71 will push the anti-detachment piece 72 relative to the hub portion 41 with the blocking surface 715 until the anti-detachment piece 72 is blocked by the stop portion 51 of the cover 5. The anti-detachment piece 72 will then block the shaft 71 from moving further along the axis X. This prevents the shaft 71 from detaching from the hub portion 41.

[0039] When assembling the wheel assembly device of this utility model with the frame 3, simply hold the wheel frame unit 4 with one hand and support the frame 3 with the other hand to assist in alignment, so that the wheel hub 41 and the axle 71 are aligned with the frame 3 respectively, and the assembly can be completed smoothly.

[0040] It should be noted that the stop portion 51 is not limited to being formed on the cover 5. In other variations of this embodiment, it may also be formed as shown in the example. Figure 8 As shown, it is integrally formed with the hub portion 41. This also achieves the purpose of preventing the anti-detachment plate 72 from falling off.

[0041] Based on the above explanation, the advantages of the aforementioned embodiments can be summarized as follows:

[0042] 1. This utility model can block the shaft 71 with the anti-detachment piece 72, preventing the shaft 71 from detaching from the hub portion 41. Therefore, without the need for other auxiliary tools, only one assembler is required to easily complete the assembly, thus improving the ease and smoothness of installation.

[0043] 2. The anti-detachment piece 72 is not only simple in structure and easy to install, but also increases the stability during assembly through the elastic middle part 723.

[0044] The above description is merely an embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wheel assembly device, suitable for mounting on a vehicle frame, comprising: A wheel rim unit, including a hub portion surrounding an axis; and A spindle unit includes a spindle passing through the hub portion along the axis, the spindle being adapted to be connected to the frame; Its features are: The axle unit further includes an anti-detachment piece disposed on the wheel frame unit and movable along the direction of gravity, which is sleeved on the axle. The axle has an annular groove formed on its outer circumferential surface. The anti-detachment piece can move relative to the axle between a centered position and an anti-detachment position. In the centered position, the anti-detachment piece is centered on the axis and contacts the outer circumferential surface. In the anti-detachment position, the anti-detachment piece deviates from the axis and engages with the annular groove.

2. The wheel assembly device according to claim 1, characterized in that: The axle also has a limiting portion adjacent to one end for abutting against the anti-detachment piece, the anti-detachment piece having a first end face for blocking the limiting portion, and a second end face opposite to the first end face for abutting against the hub portion.

3. The wheel assembly device according to claim 2, characterized in that: The axle also has a connecting section adjacent to the other end and adapted to connect the frame, and an extension section connecting the limiting portion and the connecting section. The extension section has the outer peripheral surface, a blocking surface extending from the outer peripheral surface in a direction perpendicular to the axis, and a guide slope spaced from the blocking surface in a direction along the axis and defining the annular groove together with the blocking surface. The blocking surface is used to abut against the anti-detachment piece located at the anti-detachment position, and the guide slope is used to guide the anti-detachment piece to move from the center position to the anti-detachment position.

4. The wheel assembly device according to claim 3, characterized in that: The anti-detachment pad is a disc-shaped washer, having a central portion adjacent to the axis and a peripheral portion surrounding the central portion. The thickness of the central portion may be the same as or different from the thickness of the peripheral portion.

5. The wheel assembly device according to claim 1, characterized in that: The rim unit further includes a stop portion surrounding the axis and defining an opening. The stop portion is spaced apart from one side of the hub portion along the direction of the axis and defines an annular chamber with the hub portion. The axle passes through the hub portion through the opening. The anti-detachment piece is inserted into the annular chamber and is blocked by the hub portion and the stop portion along the direction of the axis.

6. The wheel assembly device according to claim 5, characterized in that: The stop portion is integrally formed with the wheel hub portion.

7. The wheel assembly device according to claim 5, characterized in that: The wheel assembly further includes a cover connected to the hub portion of the wheel frame unit, the cover including the stop portion.

8. The wheel assembly device according to claim 5, characterized in that: The wheel assembly also includes a brake disc, which is mounted on the wheel frame unit and located on the side opposite to the stop portion of the wheel hub.

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