Hollow hub structure

Abstract

The utility model relates to a hollow wheel hub structure which comprises a wheel hub outer ring, a wheel hub inner ring and a wheel hub outer ring, a connecting cylinder is formed on the inner side of the hub outer ring; the hub inner ring is of a hollow structure; the hub inner ring is rotatably connected to the inner side of the connecting cylinder through a bearing, and a limiting part for axially limiting the bearing is formed on the hub inner ring and / or the hub outer ring; and the hub outer ring, the hub inner ring and the bearing are coaxially arranged. According to the scheme, an axle mounting part is not required to be arranged in the middle of the hub, and the side ventilation area of the hub can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle accessories, in particular to a hollow wheel hub structure. Background Art

[0002] For a two-wheeled motorcycle, the rear wheel is usually the driving wheel and the front wheel is the driven wheel. Figure 1 and Figure 2 As shown, it includes a hub 01, a wheel axle mounting portion 02 is provided in the middle of the hub 01, and the wheel axle 03 is rotatably mounted on the wheel axle mounting portion 02. The wheel axle mounting portion is connected to the outer ring of the hub via a plurality of radial connectors arranged at intervals. Figure 2 As shown, in the prior art, the connector 04 connecting the front wheel and the front shock absorbing system is arranged on both sides of the wheel axle, and the front fork of the shock absorbing system is rotatably connected to the connector.

[0003] In order to install the axle, the above structure needs to set up an axle mounting part in the middle of the wheel hub, which will block the side of the wheel hub; and because the radial distance between the axle mounting part and the outer ring of the wheel hub is relatively large, in order to ensure the overall strength of the wheel hub, multiple radial connectors will also block the side of the wheel hub. As a result, there is a large area of ​​obstruction on the side of the front wheel hub. When a motorcycle is driving at high speed on an open road, it will be affected by the side crosswind, which will add harmful lateral forces to the body, causing the body to swing and affecting the driving safety of the vehicle. Therefore, it is necessary to provide a new front wheel hub system structure to reduce the obstruction of the side of the front wheel hub and increase the side ventilation area to reduce the impact of the side crosswind and improve driving safety. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present invention is to provide a hollow hub structure, which does not require an axle mounting portion to be provided in the middle of the hub and can increase the ventilation area of ​​the hub side.

[0005] A hollow hub structure, comprising:

[0006] The outer ring of the wheel hub has a tire fixing portion for mounting the tire on its outer periphery; a connecting tube is formed on the inner side of the outer ring of the wheel hub;

[0007] The inner ring of the wheel hub is a hollow structure; the inner ring of the wheel hub is rotatably connected to the inner side of the connecting tube through a bearing, and a limiting portion is formed on the inner ring of the wheel hub and / or the outer ring of the wheel hub to provide axial limiting for the bearing; the outer ring of the wheel hub, the inner ring of the wheel hub and the bearing are coaxially arranged.

[0008] Preferably, the tire fixing portion has a plurality of ventilation openings evenly distributed along the circumferential direction on the radial side surface thereof.

[0009] Preferably, the limiting portion includes a first protrusion formed on the inner side of the connecting tube and protruding radially inward, and a second protrusion formed on the inner ring of the hub and protruding radially outward. After the hub outer ring, the hub inner ring and the bearing are assembled, the first protrusion and the second protrusion provide axial limitation for the bearing.

[0010] Preferably, the bearing inner ring comprises a symmetrically arranged left half and a right half, and the left half and the right half are detachably connected.

[0011] Preferably, the left half and the right half of the bearing inner ring respectively include a first part and a second part, the radial dimension of the first part is larger than the radial dimension of the second part, and the second part extends axially to one side relative to the first part; the step where the radial dimensions of the first part and the second part change serves as at least a part of the limiting portion, and the bearing is installed at the step; a first connecting hole is formed on the inner side of the second part, and the second parts of the left half and the right half of the bearing inner ring are arranged adjacent to each other and connected at the corresponding first connecting holes.

[0012] Preferably, it comprises two symmetrically arranged bearings, which are separated by a bearing spacer; after the left half and the right half are installed in place, the bearings and the bearing spacer are clamped by the limiting portion.

[0013] Preferably, the inner ring of the wheel hub is provided with a plurality of second connection holes along its circumferential side, and the connection angle head of the shock absorbing mechanism is fixed to the inner ring of the wheel hub through the second connection holes.

[0014] Due to the above-mentioned solution, after the hollow hub structure is installed, the ground force is transmitted to the outer ring of the hub, which then directly transmits the force to the bearing. The bearing then transmits the force to the inner ring of the hub. This eliminates the need for an axle to achieve rotation of the tire fixed to the outer ring of the hub. Furthermore, the inner and outer rings of the hub are connected by a bearing, resulting in low friction. Compared to conventional hubs, the hollow hub structure does not require an axle mounting portion in the middle of the hub, thereby increasing the side ventilation area of ​​the hub, reducing the impact of side crosswinds and improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a wheel hub in the prior art (with tire);

[0016] Figure 2 for Figure 1 AA section view;

[0017] Figure 3 This is an exploded view of the application;

[0018] Figure 4 This is a schematic diagram of the wheel hub structure of this application (with tire);

[0019] Figure 5 for Figure 4 AA sectional view;

[0020] Figure 6 for Figure 1 Schematic diagram of the hub side and corresponding ventilation surface;

[0021] Figure 7 This is a schematic diagram of the side of the hub and the corresponding ventilation surface of this application.

[0022] Reference numerals:

[0023] Hub 01, axle mounting part 02, axle 03, connector 04,

[0024] Wheel hub outer ring 1, tire fixing part 11, connecting tube 12, vent 121, first protrusion 122, left half 21, first part 211, second part 212, right half 22, bearing 3, bearing spacer 4, and connecting angle head 5 of shock absorbing mechanism. DETAILED DESCRIPTION

[0025] The embodiments of the present utility model are described in detail below.

[0026] In this embodiment, the hub center is taken as the origin, a portion relatively close to the origin in the radial direction is considered as the inner side, and a portion relatively far from the origin in the radial direction is considered as the outer side.

[0027] like Figure 3-5 As shown, this embodiment provides a hollow hub structure, including: a hub outer ring 1, whose radial outer periphery is provided with a tire fixing portion 11 for mounting a tire; a connecting cylinder 12 is formed on the inner side of the hub outer ring 1; the hub inner ring is a hollow structure; the hub inner ring is rotatably connected to the inner side of the connecting cylinder 12 through a bearing 3, and a limiting portion for providing axial limiting for the bearing 3 is formed on the hub inner ring and / or the hub outer ring 1; the hub outer ring 1, the hub inner ring and the bearing 3 are coaxially arranged.

[0028] According to the above arrangement, the hollow hub structure consists of two coaxially arranged, relatively rotatable components: the outer hub ring 1 and the inner hub ring. Regarding power transmission, ground forces are transmitted to the outer hub ring 1; the outer hub ring 1 directly transmits the forces to the bearing 3 connecting the outer hub ring 1 and the inner hub ring; the bearing 3 then transmits the forces to the inner hub ring, thereby fulfilling the basic functions of the hub. For example, when the hollow hub structure of this embodiment is used on the front wheel of a motorcycle, the front wheel acts as a driven wheel and can function normally without the need for an axle. The hollow structures of the outer hub ring 1 and the inner hub ring in this embodiment eliminate the need for an axle mounting portion in the middle of the hub, compared to conventional hubs. This increases the side ventilation area of ​​the hub, reduces the impact of crosswinds, and improves driving safety.

[0029] like Figure 6 (A) In the prior art, a wheel hub center is provided with an axle mounting portion, and the axle mounting portion is connected to the wheel hub outer ring 1 through a plurality of radial connectors arranged at intervals. Figure 6 (B) Represented by a closed curve range Figure 6 (A) The ventilation area of ​​the hub structure. Figure 7 (A) is the hub structure in this embodiment, which is a hollow structure with no obstruction at the center. In addition, the tire fixing portion 11 of the hub outer ring 1 has multiple ventilation holes 121 evenly distributed along the circumferential direction on its radial side, thereby significantly increasing the side ventilation area of ​​the hub. Figure 7 (B) Represented by a closed curve range Figure 7 (A) The ventilation area of ​​the hub structure. Through measurement, it can be seen that when the hub size is the same, Figure 7 The curve range in (B) is Figure 6 It can be seen that the structure of the present application can significantly expand the air permeable area of ​​the hub side and significantly reduce the impact of side crosswinds.

[0030] In this embodiment, a limiting portion is provided to provide axial positioning for the bearing 3, preventing axial misalignment between the hub inner ring, the bearing 3, and the hub outer ring 1 due to lateral forces on the wheel hub during vehicle operation, thereby ensuring driving safety. In one specific embodiment, the limiting portion includes a first protrusion 122 formed radially inwardly on the inner side of the connecting tube 12, and a second protrusion formed radially outwardly on the hub inner ring. After the hub outer ring 1, the hub inner ring, and the bearing 3 are assembled, the first protrusion 122 and the second protrusion provide axial positioning for the bearing 3. This arrangement allows the bearing 3 to be simultaneously secured after the hub outer ring 1, the bearing 3, and the hub inner ring are installed.

[0031] like Figure 5As shown, the inner ring of the bearing 3 includes a symmetrically arranged left half 21 and right half 22, which are detachably connected. The detachable left and right halves 21 and 22 facilitate the installation of the bearing 3. The left and right halves 21 and 22 of the wheel hub inner ring respectively include a first portion 211 and a second portion 212. The radial dimension of the first portion 211 is larger than that of the second portion 212, and the second portion 212 extends axially toward one side relative to the first portion 211. A step where the radial dimensions of the first and second portions 211 and 212 vary serves as at least part of the stopper, and the bearing 3 is mounted on this step. A first connecting hole is formed inside the second portion 212. The second portions 212 of the left and right halves 21 and 22 of the inner ring of the bearing 3 are arranged adjacent to each other and connected at the corresponding first connecting hole. This embodiment includes two symmetrically arranged bearings 3, separated by a bearing spacer 4. After the left and right halves 21, 22 of the inner rings of the bearings 3 are installed, the bearings 3 on both sides and the bearing spacer 4 between the two bearings 3 are clamped by a limiting portion. Furthermore, the radially outer sides of the other sides of the bearings 3 are axially limited by the first protrusion 122 of the wheel hub outer ring 1, while the radially inner sides of the bearings 3 on this side are separated and axially limited by the bearing spacer 3. This structure allows the bearings 3 and the bearing spacer 4 to be clamped by the wheel hub inner and outer rings, resulting in a simple and reliable connection structure.

[0032] like Figure 3 and Figure 4 The inner ring of the wheel hub is provided with a plurality of second connection holes along its circumferential side, through which the connection angle heads 5 of the shock absorber mechanism are fixed to the inner ring of the wheel hub. The connection angle heads 5 are fixed to the inner ring of the wheel hub, replacing the traditional wheel axle to achieve connection with the shock absorber mechanism, etc., ensuring that the hollow wheel hub structure of the present application can also meet the required connection function with the shock absorber mechanism, etc.

[0033] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hollow hub structure, characterized in that: include: The outer ring of the wheel hub has a tire fixing portion for mounting the tire on its outer periphery; a connecting tube is formed on the inner side of the outer ring of the wheel hub; The inner ring of the wheel hub is a hollow structure; the inner ring of the wheel hub is rotatably connected to the inner side of the connecting tube through a bearing, and a limiting portion is formed on the inner ring of the wheel hub and / or the outer ring of the wheel hub to provide axial limiting for the bearing; the outer ring of the wheel hub, the inner ring of the wheel hub and the bearing are coaxially arranged.

2. The hollow hub structure according to claim 1, characterized in that: The tire fixing portion has a plurality of ventilation openings uniformly distributed along the circumferential direction on a radial side surface thereof.

3. The hollow hub structure according to claim 1, characterized in that: The limiting portion includes a first protrusion formed on the inner side of the connecting tube and protruding radially inward, and a second protrusion formed on the inner ring of the hub and protruding radially outward. After the hub outer ring, the hub inner ring and the bearing are assembled, the first protrusion and the second protrusion provide axial limitation for the bearing.

4. The hollow hub structure according to claim 1, characterized in that: The bearing inner ring comprises a symmetrically arranged left half and a right half, and the left half and the right half are detachably connected.

5. The hollow hub structure according to claim 4, characterized in that: The left half and the right half of the bearing inner ring respectively include a first part and a second part, the radial dimension of the first part is larger than the radial dimension of the second part, and the second part extends axially to one side relative to the first part; the step where the radial dimensions of the first part and the second part change serves as at least a part of the limiting portion, and the bearing is installed at the step; a first connecting hole is formed on the inner side of the second part, and the second parts of the left half and the right half of the bearing inner ring are arranged adjacent to each other and connected at the corresponding first connecting holes.

6. A hollow hub structure according to claim 4 or 5, characterized in that: It comprises two symmetrically arranged bearings, which are separated by a bearing spacer sleeve. After the left half and the right half are installed in place, the bearings and the bearing spacer sleeve are clamped by the limiting part.

7. The hollow hub structure according to claim 1, characterized in that: The inner ring of the wheel hub is provided with a plurality of second connection holes along the circumferential side thereof, and the connection angle heads of the shock absorbing mechanism are fixed to the inner ring of the wheel hub through the second connection holes.

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