JPH0736801Y2 - Vehicle wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle wheel in which a wheel disk is formed between an axle supporting hub and a tire mounting rim.

[Prior Art] Conventionally, it is known that a wheel disk is integrally formed between an axle supporting hub and a tire mounting rim, and the wheel disk is solidly formed because of its ease of manufacture (actual development Sho 58 -See the 44540 publication).

Further, in the case where the wheel disc is formed in a hollow shape, a pair of discs facing each other with a predetermined interval are provided, a tire mounting rim is provided on the outer peripheral portion thereof, and Is known as an assembly type in which axle supporting hubs are manufactured separately and fixed by brazing (see Japanese Utility Model Laid-Open No. 57-124401).

In the case of the above configuration, since the wheel disc has a large disc surface, a wheel having a peculiar appearance different from that by the spoke can be obtained.

[Problems to be Solved by the Invention] However, according to the former wheel, since the wheel disc is solid, the wheel becomes thick and a large amount of material is wasted, and the weight becomes heavy.

On the other hand, according to the latter wheel, since the wheel disc is hollow, the thickness is thin and the waste of material can be reduced, but since each component is a separate component, the number of parts is increased. However, there is a problem that the assembly work is troublesome.

Further, since the inner space of the wheel disk is hollow all around, it is necessary to have a thick portion to some extent, and therefore it cannot be thinned, and it is difficult to reduce the weight of the wheel.

This invention was made to solve the above problems,
An object of the present invention is to provide a vehicle wheel that has a small number of parts, is easy to manufacture, and has a thin wheel disk to achieve weight reduction of the wheel.

[Means for Solving the Problems] A wheel of a vehicle according to the present invention comprises a hollow wheel disk formed in an annular shape having an outer peripheral wall closed and both side walls having a predetermined interval and an opening at an inner peripheral end. , A tire mounting rim provided on the outer peripheral wall of the wheel disk,
A pair of cylindrical boss portions projecting in the axial direction at the inner peripheral end of the wheel disk, and axle support hubs coaxially arranged at predetermined intervals on the boss portions, A plurality of connecting portions that extend radially from the hub and that are connected to the boss portion and that communicate with the opening and that have through holes formed in the axial direction, and a plurality of connecting portions that extend radially from the hub and the through holes and the wheel disk. A first internal rib that divides the space into a plurality of sections in the circumferential direction and a second internal rib that divides the inner space of the wheel disk into a plurality of sections in the circumferential direction are integrally formed.

[Operation] According to the above configuration, since the wheel disk is integrally formed between the axle supporting hub and the tire mounting rim, the number of parts is small, and compared with a case where these are separately configured, Its manufacture is easy.

In addition, since the wheel disc is hollow, the wall thickness is thin and the material waste can be reduced, and the wheel disc can be thin and the weight of the wheel can be reduced.

That is, even when the wall thickness is reduced as described above, the first and second inner ribs that partition the inner space of the wheel disk into a plurality of sections in the circumferential direction are provided, and the inner end portion of the first inner rib is integrated with the hub. Since it is fixed to the hub, the load applied to the hub via the axle can be supported by the internal ribs, so that the mechanical strength of the wheel disk can be secured.

Further, the first internal rib is a part of the core in another inner space 11 of the wheel disk when the core for forming the hollow of the wheel disk is taken out from the opening through the through hole. Can be effectively prevented from invading, and the efficiency of the scraping operation can be increased, which can contribute to the ease of manufacturing.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an example of a wheel of a motorcycle according to the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.

In FIG. 1, a hub 1 is provided at the center of the wheel, and the hub 1 supports the axle via a bearing (not shown).

The hub 1 has a plurality of (6
Inner) connecting ribs 2 are provided.
Extend in the radial direction and are connected to the boss 3.

That is, as shown in FIG. 2, the boss portion 3 is composed of a pair of left and right cylindrical members which are coaxially arranged at a predetermined interval on the outer periphery of the hub 1. The portion 3 is connected with a plurality of inner peripheral connecting ribs 2, and a first through hole 6 extending in the axial direction is formed between the connecting ribs 2.

A brake disc mounting boss 4 is provided on each of the boss portions 3 so as to correspond to the inner peripheral connecting portion 2, and a bolt for mounting a brake disc (not shown) is screwed onto the mounting boss 4. Bolt holes 5 are formed respectively.

The boss portions 3 are fixed to both the left and right sides of the inner end portion of the hollow wheel disk 7.

The wheel disk 7 is formed in an annular shape having an outer peripheral wall 7b closed and both side walls 7a, 7a having an opening 14 at an inner peripheral end portion with a predetermined interval, and has a hollow internal space 11. A pair of cylindrical boss portions 3 protruding in the axial direction are provided on the inner peripheral end portion.

In the internal space 11 of the wheel disk 7, a first internal rib 12 is a long partition wall that extends inward from the outer peripheral wall 7b and divides it into a plurality of sections in the circumferential direction, and a second short partition wall. The internal rib 13 is integrally formed.

The first inner rib 12 is connected to the hub 1 as shown in FIG. 3, and the second inner rib 13 extends to the central portion of the wheel disc 7.

A rim 9 to which a tire (not shown) is mounted is arranged at a position radially outward from the outer peripheral wall 7b of the wheel disk 7.

Between the outer peripheral wall 7b and the rim 9, a plurality of (15)
The outer peripheral connecting portions 8 are radially arranged at substantially equal intervals in the circumferential direction. The outer peripheral wall 7b and the rim 9 are radially connected by these outer peripheral connecting portions 8.

The outer peripheral wall 7b and the rim 9 are provided between the plurality of outer peripheral connecting portions 8.
A plurality of (15) second through holes 10 axially penetrating between and
Are formed. Each of the second through holes 10 communicates with the outside of the inner space 11 in the radial direction through six elongated hole-shaped communicating holes 15 formed by casting in the outer peripheral wall 7b.

Next, an outline of manufacturing the wheel will be described.

The above-mentioned wheel is integrally cast and formed by, for example, an aluminum die cast. During the casting, a pair of molds (not shown) support the inner peripheral side base end of the core 16 and a supporting protrusion 16a provided on the outer peripheral side of the core 16.
Positioning is performed by holding. This core
16 is made with shell mold (shell type) and can be decomposed into sand.

After the molten aluminum alloy is injected into the gap (cavity) formed between the mold and the core 16 to be solidified by casting, the mold is opened, as shown in FIGS.
As shown, a wheel with a residual core 16 is obtained.

The core 16 is scraped off and removed from the first through hole 6. At this time, a part of the sand scraped off as shown by an arrow X in FIG. 4 passes around the hub 1 and tries to enter the lower internal space 11.

However, according to the above configuration, the inner space 11 of the wheel disk 7 is partitioned by the first inner ribs 12 in the circumferential direction into, for example, three compartments. When scraped off from 6, there is no risk that part of the scraped sand will pass around the hub 1 and enter the other internal space 11, and the core 16 will pass from the opening 14 through the through hole 6. It can be scraped out, and the scraping work can be made more efficient.

A communication hole 15 as shown in FIG. 1 is formed in the wheel from which the core 16 has been removed. The communication hole 15 prevents rainwater and the like from entering the inner space 11 when the vehicle is running. Second
It also has a function of draining water from the through hole 10 to the outside.

As is apparent from the above, according to the above configuration, since the wheel disc 7 is integrally formed between the axle supporting hub 1 and the tire mounting rim 9, the number of parts is small, and these components are provided as in the conventional case. It is easier to manufacture as compared with the case where a separately configured one is assembled.

In addition, since the wheel disk 7 is hollow, it can be made thin to reduce waste of material, and the wheel disk 7 can be made thin to achieve weight reduction of the wheel.

That is, even when the wheel disk 7 is made thin and lightweight as described above, the first and second internal ribs 12 and 13 that partition the internal space 11 of the wheel disk 7 into a plurality of sections in the circumferential direction are provided. Strength is improved.

Moreover, since the inner end portion of the first inner rib 12 is integrally fixed to the hub 1, the load applied to the hub 1 via the axle is supported by the inner rib 12 and The mechanical strength of the wheel disk 7 can be improved.

Furthermore, when the hollow forming core 16 of the wheel disc 7 is taken out from the opening 14 through the through hole 6, the first inner rib 12 is provided with another inner space 11 partitioned into a plurality of spaces in the wheel disc 7. Further, it is possible to effectively prevent a part of the core 16 from invading, to achieve high efficiency of the scraping work, and to contribute to facilitation of the manufacturing.

[Advantages of the Invention] As described above, according to the present invention, it is possible to provide a wheel of a vehicle that has a small number of parts, is easy to manufacture, and can reduce the weight of the wheel disk by reducing the thickness thereof. it can.

[Brief description of drawings]

FIG. 1 is a side view of a wheel showing an embodiment of the present invention,
2 is a sectional view taken along the line II-II in FIG. 1, and FIG.
FIG. 4 is a sectional view taken along the line III-III of FIG. 4, and FIG. 1 ... Axle support hub, 2 ... Coupling part, 3 ... Boss part,
6 ... through hole, 7 ... wheel disk, 7a ... both side walls, 7b ... outer peripheral wall, 9 ... tire mounting rim, 11 ... internal space, 12 ... first internal rib, 13 ... first 2 internal ribs, 14
…… Aperture.

Claims (1)

[Scope of utility model registration request] 1. A hollow wheel disk, the outer wall of which is closed and both side walls of which are spaced apart by a predetermined distance and which has an opening at the inner peripheral end, and a tire which is provided on the outer wall of the wheel disk. A mounting rim, a pair of cylindrical boss portions axially protruding from the inner peripheral end portion of the wheel disk, and an axle support coaxially arranged on the boss portions at a predetermined interval. Hub, a plurality of connecting portions that extend radially from the hub and are connected to the boss portion, and have through-holes axially formed to communicate with the opening, and the through-hole extending radially from the hub. And a first internal rib partitioning the inner space of the wheel disk into a plurality of sections in the circumferential direction, and a second inner rib partitioning the inner space of the wheel disk into a plurality of sections in the circumferential direction, which are integrally molded. Wheel.