Auxiliary wheel

Abstract

The present invention relates to an auxiliary wheel, comprising a wheel hub, including an outer wheel hub and an inner wheel hub; a tire, which is arranged around the outer circumference of the outer wheel hub; a through hole extending along the axial direction is provided in the central portion of the outer wheel hub, the inner wheel hub is inserted into the through hole, and the outer wheel hub and the inner wheel hub are detachably connected through a first connecting component, and when the first connecting component releases the connection between the outer wheel hub and the inner wheel hub, relative rotation can be generated between the outer wheel hub and the inner wheel hub. The present invention splits the wheel hub into an outer wheel hub and an inner wheel hub, and when the connection between the outer wheel hub and the inner wheel hub is released, relative rotation can be generated between the outer wheel hub and the inner wheel hub, so that when towing a vehicle, there is rolling friction between the tire and the ground, the friction force is small, and the wear on the tire is small.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an auxiliary wheel. Background Art

[0002] The wheels of a car are usually composed of a hub and a tire, which supports the weight of the whole car, enables the car to travel on the road, and has a significant impact on the running performance of the car. As shown in the "Plastic Hub and Aluminum Hub Dual-Piece Wheel" disclosed in the Chinese utility model patent with patent number CN201920916059.3 (publication number CN210026897U), it includes a hub and a tire, the hub includes a plastic hub made of plastic and an aluminum hub made of aluminum, the plastic hub includes a middle ring, a first side ring and a first bevel connection portion, the middle ring and the first side ring smoothly transition through the first bevel connection portion, the middle ring end has a plurality of arc blocks arranged circumferentially, there is a gap between adjacent arc blocks, and a through hole is opened inside the gap.

[0003] The above tires have the following defects: 1. Although the wheel hub of the tire is a split design, the plastic wheel hub and the aluminum wheel hub cannot rotate relative to each other even when they are not connected by studs, because the connecting block of the aluminum wheel hub is embedded in the gap of the plastic wheel hub, and the cooperation of the connecting block and the gap plays a role of stopping rotation, which is equivalent to the plastic wheel hub and the aluminum wheel hub always being an integrated part. In some cases, such as towing, the plastic wheel hub and the aluminum wheel hub are locked, so the tire is equivalent to sliding friction on the ground, the friction is large, and the tire is easily damaged; 2. The shaft connecting hole of the plastic wheel hub has the same diameter everywhere along its axial direction, which is equivalent to the shaft connecting hole being a straight hole, so it can only adapt to one specification of shaft, and the versatility is poor. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an auxiliary wheel which can still rotate after a little treatment when the wheel hub is locked, so as to facilitate towing and maintenance.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an auxiliary wheel, comprising

[0006] A wheel hub, including an outer wheel hub and an inner wheel hub;

[0007] A tire, arranged around the outer circumference of the outer wheel hub;

[0008] The invention is characterized in that a through hole extending along the axial direction is provided in the central portion of the outer hub, the inner hub is at least partially inserted in the through hole, and the outer hub and the inner hub are detachably connected via a first connecting assembly, and when the first connecting assembly releases the connection between the outer hub and the inner hub, relative rotation can be generated between the outer hub and the inner hub.

[0009] In order to connect the inner hub with the outer hub, the inner hub includes an annular body that can be inserted into the through hole and a mounting plate radially extending from the periphery of the first end of the annular body. When the annular body is inserted into the through hole, the mounting plate is located outside the through hole and abuts against the outer hub, and the mounting plate and the outer hub are detachably connected via a first connecting component.

[0010] The structure is simple, and the first connecting assembly is a bolt and a nut that can be threadedly connected.

[0011] In order to prevent the inner hub and the outer hub from generating relative axial displacement after the first connecting component releases the connection between the inner hub and the outer hub, preferably, a through hole extends from the second end of the annular body, a positioning ring is sleeved on the annular body, the positioning ring and the annular body are detachably connected via a second connecting piece, the positioning ring and the mounting plate are respectively located on both sides of the through hole, and the positioning ring is against the outer hub.

[0012] After the first connecting assembly is removed, the inner hub and the outer hub can rotate circumferentially due to the gap between them. However, when the inner hub and the outer hub rotate relative to each other, the outer hub may move axially and deflect. The positioning ring and the mounting plate work together to limit the axial movement and deflection of the outer hub.

[0013] The reason why the positioning ring and the annular body are designed to be detachably connected is that if the two are fixedly connected and cannot be disassembled, the annular body cannot be inserted into the through hole of the outer hub, that is, the inner hub cannot be installed on the outer hub.

[0014] The structure is simple, and the second connecting member is a bolt that passes through the annular body and is threadedly connected to the positioning ring.

[0015] In order to improve the versatility of the wheel, a mounting hole for mounting the shaft is formed in the central portion of the inner hub. The mounting hole is a stepped hole, so that shafts with different end diameters can be mounted in the mounting hole. The mounting hole has strong versatility and is applicable to a wide range of vehicle models.

[0016] In the above solution, the mounting holes include at least two holes whose axial diameters gradually increase along the inner hub.

[0017] Preferably, the outer hub is a plastic part, and the inner hub is a metal part. The inner hub is a metal part, which is used to support the mass of the whole vehicle and can meet the force requirements of the vehicle. The outer hub is a plastic part to reduce the cost and reduce the overall weight of the vehicle, which is beneficial to driving.

[0018] Preferably, the tire is a rubber part integrally formed on the outer wheel hub, which improves the tire's torsional resistance, good grip (does not leave the ground), and friction resistance.

[0019] Preferably, at least two convex portions for limiting speed are provided at intervals along the circumferential direction on the outer peripheral wall of the tire, and each convex portion extends along the thickness direction of the tire. If the wheel rotates too fast, the tire will vibrate due to the design of the convex portions, reminding the user that this is an auxiliary wheel (such as a wheel used for maintenance or a spare tire) and not a driving wheel.

[0020] Compared with the prior art, the advantages of the present invention are as follows: the present invention designs the wheel hub to be split into an outer wheel hub and an inner wheel hub, so that when the connection between the outer wheel hub and the inner wheel hub is released, relative rotation can be generated between the outer wheel hub and the inner wheel hub, so that when the wheel hub is locked on the trailer, there is rolling friction between the tire and the ground, the friction force is small, the wear on the tire is small, the structure is simple, and the operation and handling are easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure in another direction;

[0023] Figure 3 for Figure 1 Schematic diagram of the decomposition of

[0024] Figure 4 for Figure 1 A cross-sectional view of

[0025] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0026] Figure 6 for Figure 5 A schematic diagram of the structure in another direction;

[0027] Figure 7 for Figure 5 Schematic diagram of the decomposition of

[0028] Figure 8 for Figure 5 sectional view of . DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figures 1 to 4 As shown, the auxiliary wheel of this preferred embodiment includes a wheel hub and a tire 1 , wherein the wheel hub includes an outer wheel hub 2 and an inner wheel hub 3 , and the tire 1 is arranged around the outer circumference of the outer wheel hub 2 .

[0032] The central part of the outer hub 2 is provided with a through hole 21 extending along its axial direction. The inner hub 3 includes an annular body 31 that can be inserted into the through hole 21 and a mounting plate 32 that radially extends from the first end periphery of the annular body 31. When the annular body 31 is inserted into the through hole 21, the mounting plate 32 is located outside the through hole 21 and abuts against the outer hub 2, and the mounting plate 32 and the outer hub 2 are detachably connected through the first connecting assembly. When the first connecting assembly releases the connection between the outer hub 2 and the inner hub 3, in this embodiment, when the first connecting assembly is removed, relative rotation can be generated between the outer hub 2 and the inner hub 3.

[0033] In this embodiment, the first connection assembly is a bolt and a nut that can be threadedly connected, which has a simple structure, is relatively common in life, and is cheap. A first mounting hole 321 is provided on the mounting plate 32, and a second mounting hole 22 is provided on the wall of the outer hub 2 facing the mounting plate 32. The bolt passes through the first connection hole 321 and the second connection hole 22, and then the nut is threadedly connected to the end of the screw, thereby connecting the mounting plate 32 and the outer hub 2 together.

[0034] The second end of the annular body 31 extends out of the through hole 21, and a positioning ring 4 is sleeved on the annular body 31. The positioning ring 4 and the annular body 31 are detachably connected through a second connecting member. The positioning ring 4 and the mounting plate 32 are respectively located on both sides of the through hole 21, and the positioning ring 4 abuts against the outer hub 2. In this embodiment, the second connecting member is a bolt.

[0035] A third mounting hole 33 is provided on the annular body 31, and a fourth mounting hole 41 is provided on the positioning ring 4, wherein the fourth mounting hole 41 is a threaded hole, and a bolt passes through the third mounting hole 33 and is threadedly connected to the fourth mounting hole 41 to connect the inner hub 3 and the positioning ring 4 together.

[0036] The outer hub 2 and the inner hub 3 are connected by the first connecting component, and the positioning ring 4 is connected to the inner hub 3 by the second connecting member. When the first connecting component is removed, the second connecting member connects the positioning ring 4 to the annular body 31, so that the inner hub 3 and the outer hub 2 can rotate in the circumferential direction, but are not prone to deflection and relative axial movement.

[0037] In the embodiment, the outer wheel hub 2 is a plastic part, and the inner wheel hub 3 is a metal part, such as an iron part. The inner wheel hub 3 is a metal part, which is used to support the mass of the whole vehicle and can meet the requirements of the vehicle's force. The outer wheel hub 2 is a plastic part to reduce the cost and reduce the overall weight of the vehicle, which is beneficial to driving. The tire 1 is a rubber part integrally formed on the outer wheel hub 2, which can improve the torsion resistance of the tire 1, have good grip (do not leave the ground), and are friction-resistant.

[0038] Preferably, at least two convex portions 11 are provided at intervals along the circumferential direction on the outer peripheral wall of the tire 1, and each convex portion 11 extends along the thickness direction of the tire 1. The function of the convex portion 11 is to limit the wheel speed. Due to the design of the convex portion 11, if the wheel speed is fast, it will vibrate to remind the user that this is an auxiliary wheel (such as a spare tire or a wheel used during maintenance) and not a driving wheel.

[0039] A mounting hole 34 for mounting the shaft is formed in the central portion of the inner hub 3. In this embodiment, since the annular body 31 of the inner hub 3 is annular, the space enclosed by the annular body 31 is the mounting hole 34, and the axle is mounted in the mounting hole 34.

[0040] Example 2

[0041] The difference between Example 2 and Example 1 is that:

[0042] like Figures 5 to 8 As shown, the mounting hole 34 of the first embodiment is a straight hole with the same diameter at all places, while the mounting hole 34 of this embodiment is a stepped hole, and the mounting hole 34 includes at least two holes with gradually increasing diameters along the axial direction of the inner hub 3. In this embodiment, the mounting hole 34 includes two holes with different diameters, one is a large hole 341, and the other is a small hole 342. The advantage of designing the mounting hole 34 as a stepped hole is that shafts with different end diameters can be installed in the mounting hole 34, which has strong versatility and is applicable to a wide range of vehicle models.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A training wheel, comprising A wheel hub, comprising an outer wheel hub (2) and an inner wheel hub (3); A tire (1) is arranged around the outer circumference of the outer wheel hub (2); Features: A through hole (21) extending along the axial direction is provided at the central portion of the outer hub (2), and the inner hub (3) is at least partially inserted into the through hole (21), and the outer hub (2) and the inner hub (3) are detachably connected via a first connecting component, and when the first connecting component releases the connection between the outer hub (2) and the inner hub (3), relative rotation can be generated between the outer hub (2) and the inner hub (3); the first connecting component is a bolt and a nut that can be threadedly connected; The inner wheel hub (3) comprises an annular body (31) which can be inserted into the through hole (21) and a mounting plate (32) which radially extends from the periphery of the first end of the annular body (31); when the annular body (31) is inserted into the through hole (21), the mounting plate (32) is located outside the through hole (21) and abuts against the outer wheel hub (2); and the mounting plate (32) and the outer wheel hub (2) are detachably connected via a first connecting assembly; The second end of the annular body (31) extends out of the through hole (21), and a positioning ring (4) is sleeved on the annular body (31). The positioning ring (4) and the annular body (31) are detachably connected via a second connecting piece. The positioning ring (4) and the mounting plate (32) are respectively located on both sides of the through hole (21), and the positioning ring (4) abuts against the outer wheel hub (2); when the wheel hub is locked, there is rolling friction between the tire and the ground when the vehicle is towed.

2. The auxiliary wheel according to claim 1, characterized in that: The second connecting member is a bolt that passes through the annular body (31) and is threadedly connected to the positioning ring (4).

3. The auxiliary wheel according to any one of claims 1 to 2, characterized in that: A mounting hole (34) for mounting a shaft is formed at the central portion of the inner hub (3). The mounting hole (34) is a stepped hole so that shafts with different end diameters can be mounted in the mounting hole (34).

4. The auxiliary wheel according to claim 3, characterized in that: The mounting hole (34) comprises at least two holes whose diameters gradually increase along the axial direction of the inner hub (3).

5. The auxiliary wheel according to any one of claims 1 to 2, characterized in that: The outer wheel hub (2) is a plastic part, and the inner wheel hub (3) is a metal part.

6. The auxiliary wheel according to any one of claims 1 to 2, characterized in that: The tire (1) is a rubber part integrally formed on the outer wheel hub (2).

7. The auxiliary wheel according to claim 6, characterized in that: At least two convex portions (11) for limiting speed are arranged at intervals along the circumferential direction on the outer peripheral wall of the tire (1), and each of the convex portions (11) extends along the thickness direction of the tire (1).

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