JPS5912482B2 - Tire and wheel rim assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tire and wheel rim assembly with an annular safety support member for supporting the pneumatic tire when it is in a deflated or deflated condition.

This type of safety support member is described in British Patent No. No. 1375415.

This support member is preferably made of a rigid resin or a metal such as aluminum alloy, and is formed integrally by connecting several divided parts to each other.

The object of the invention is to provide a tire and wheel rim assembly which can be operated safely to a certain extent even when the tire is deflated.

A tire and wheel rim assembly according to the present invention includes a pneumatic tire having a tread, a sidewall, a bead, a pair of axially spaced bead seats, and a pneumatic tire having a tread, a sidewall, and a bead. A wellless wheel rim on which each bead of a pneumatic tire is seated, a bearing ring mounted on the wheel rim between both bead seats, and an axial positioning of the bearing ring on the wheel rim, and a positioning device acting between the bearing ring and each bead of the pneumatic tire to hold it in a bead seat; and an annular positioning device mounted on the bearing ring to support the tread when the pneumatic tire is in a deflated condition. a rotatable safety support member, the support ring has a groove-shaped cross-section with a flat bottom of uniform diameter and opposite ends, and an annular support member supports the tread on the flat bottom; Sometimes the annular support member is mounted for rotational movement relative to the bearing ring, and the opposing ends extend axially outwardly to provide axial positioning of the annular support member on the bearing ring. It is composed of

The pneumatic tires of this assembly may be of the tubeless type and may be either bias tires or radial tires.

The bearing ring may be split about a radial plane within the smaller outer bearing diameter for assembly on a pre-assembled or partially assembled annular support member.

The bearing ring may also be divided into two or more parts so as to be connected in a manner similar to the annular support member, in which case the divided parts are different in length and number from the divided parts of the annular support member. It is preferable that they are the same.

The positioning device may be an integral shoulder on each side of the bearing ring or a separate spacing ring.

This spacing ring may be a resilient member, for example rubber, and may be solid or void.

However, it is preferred that the spacing ring be sufficiently stiff to prevent bead dislodgement.

For example, the bearing surface of the bearing ring is made of poly, tetrafluor,
A low friction coating may be applied, such as an ethylene CP, T, F, E)M coating, or alternatively a lubricant may be applied to the assembly.

The low friction material may also be provided on the surface of the annular support member that contacts the tire.

Furthermore, a degree of resiliency may be imparted to the support roller by providing a layer of elastic material on the outer periphery of the annular support member or on the inner periphery of the tire.

The invention is particularly suitable for application to truck and military vehicle tires, which tires have wells.
) but have a removable flange ring or are attached to a split rim type rim assembly.

This wheel rim may therefore be of the type with a 15° slope at the bead seat, in which case the positioning device effectively prevents the bead from breaking away.

The features of the invention will become clearer from the description of two embodiments with reference to the accompanying drawings.

The tire and wheel rim assembly shown in FIG. 1 includes a main wheel rim 1 having a first retaining flange 2, a bead seat 3, and a fixing ring groove 4.

A removable flange 5 having a bead seat 6 is attached to the main wheel rim 1.
and is held in the engaged state by the fixing ring 7,
A well-less wheel rim assembly is constructed that has no recesses, ie, a flat bottom.

A seal ring 8 is provided between the rim 1 and the removable flange 5.

The tire 9 is located at the bead seats 3 and 6.

The bearing ring 10 is fitted between the beads 11 and 12 of the tire 9.

The bearing ring 10 has two halves 13, 14 which abut one another and form a channel-shaped cross-section with a bottom and radially outwardly projecting opposite ends or side walls.

An abutment shoulder 15 is provided on each of the two halves 13.14, contacting the bead 11.12 and holding it against the flange 2.5.

The inner surface, or bottom 16, of the bearing ring 10 is coated with a coating layer 17 of polytetrafluoroethylene, and the annular safety support member 18 has a groove-shaped cross-section so as to run on this coating layer 17. is mounted in the groove of the bearing ring 10 of.

The annular safety support member is similar to that described in GB 1375415.

The embodiment shown in FIG.
Two rim halves held together by 1 19.20
It has a split rim assembly formed by.

The bearing ring 22 is located in the center of the rim assembly, and a pair of spaced spacer rings 23, 24 surround the bearing ring 22.
on both sides.

This pair of spacer rings 23, 24 are connected to the bearing ring 2.
This is a positioning device that functions to position the beads 25 and 2 and to hold the beads 25 and 26 in their respective bead seats.

The spacer rings 23 and 24 are made of rubber, and are held in a somewhat compressed state when assembled.

The bearing ring 22 has a U-shaped cross-section extending around the rim assembly, and the annular support member 27 can have any of the aforementioned shapes.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a tire and wheel rim assembly having a removable flange type wheel rim assembly according to the present invention, and FIG. 2 is a partial sectional view of a tire and wheel rim assembly having a split type wheel rim assembly. A partial cross-sectional view is shown. DESCRIPTION OF SYMBOLS 10, 22... Support ring, 18, 27... Safety support member, 11.12, 25.26... Tire bead, 23.24... Spacer ring, 15... Shoulder part,
17...Polytetrafluoroethylene coating layer.

Claims (1)

[Scope of Claims] 1. A tire and wheel rim assembly comprising: a pneumatic tire having a tread, a sidewall, and a bead; a pair of axially spaced bead seats; a wellless wheel rim assembly having a respective bead of the pneumatic tire seated on each seat; a bearing ring mounted on the wheel rim assembly between the bead seats; and the wheel on the bearing ring. a positioning device mounted on the bearing ring and operative between the bearing ring and each bead of the pneumatic tire to provide axial positioning on the rim assembly and to retain the bead in the bead seat; and an annular rotatable safety support member for supporting the tread when the pneumatic tire is in a deflated condition, the support ring being groove-shaped having a flat bottom of uniform diameter and opposite ends. the support member is mounted on the flat bottom portion for rotational movement relative to the support ring when the support member supports the tread surface; An assembly, wherein opposite ends are each configured to extend radially outwardly to provide axial positioning of the support member on the bearing ring.