CN2403601Y

CN2403601Y - Short fibre radial ply agricultural tyre

Info

Publication number: CN2403601Y
Application number: CN 00200529
Authority: CN
Inventors: 朱光宇; 马培瑜
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-17
Filing date: 2000-01-17
Publication date: 2000-11-01
Anticipated expiration: 2010-01-17

Abstract

The utility model relates to a radial agricultural tyre which comprises a tread, a buffer layer, a tyre body and a bead. The utility model is characterized in that the radial tyre whole is directly composed of an oriented rubber complex of short fiber and a wire loop, wherein the oriented rubber complex of short fiber is formed by the oriented arrangement of inconsecutive short fiber groups in the rubber. The utility model can effectively solve the shortages of shoulder separation, delamination, tyre crown abrasion, etc., existing in the common oblique crossing agricultural tyre, can effectively reduce the heat generation of tyre internal friction and decreases the rolling resistance. Compared with the current radial tyre, the utility model has the advantages of convenient fabrication process and cost reduction of the production cost and raw materials.

Description

Chopped fiber radial agricultural tyre

The utility model belongs to the tire field, relates in particular to a kind of agricultural radial-ply tyre.

As everyone knows, current agricultural tyre mainly adopts the tire of common oblique cord structure, and this tire mainly is made up of rubber tread, rubberized breaker cord, bias ply carcass, chafer, bead coil etc.But this tire has the shortcoming of following four aspects: 1, owing to adopt the carcass and the cushion layer of cross-ply structure, in the stress lower slider, internal friction increases between each cord, and Sheng Regao causes tire drag to strengthen, and fuel-economizing is poor; 2, the actual use later stage of tire, be prone to quality problems such as shoulder sky, delamination, and tire is scrapped too early; 3, because each site pressure skewness of diagonal tyre causes the crown serious wear; 4, the anti-mechanical damage ability in oblique configuration rubber for tire tyre surface and sidewall, collapse easily the flower, fall piece, anti-penetration ability is poor.Radial-ply tyre is a kind of structure advanced person's a tire, this kind tire mainly contains compositions such as tyre surface, steel wire or cord carcass of tyre, carcass plies bound edge, bead coil, but the production facilities costliness of this kind tire, complex manufacturing, productive costs height, so this tire is mainly used on the vehicle that car etc. travels at a high speed.The open JP8270706 of Japan special permission discloses and has a kind ofly used short-fiber rubber in the heavy load radial tire bumping-buffer, but wholely uses the rubber combined system of orientated short fiber to make agricultural radial-ply tyre not appear in the newspapers.

The purpose of this utility model provides a kind of advanced concept tire of novel concept, and it can effectively solve the deficiencies such as shoulder sky, delamination, mill crown of common oblique agricultural tyre, and can reduce the tire internal friction effectively and give birth to heat and reduce rolling resistance; Compare with existing radial-ply tyre, its manufacturing process is easy, and the productive costs and the cost of raw material reduce.

Agricultural radial-ply tyre of the present utility model, comprise tyre surface, cushion layer, carcass and four parts of tyre bead, it is characterized in that this radial-ply tyre integral body directly is made of rubber combined body of orientated short fiber and bead coil, wherein the rubber combined body of orientated short fiber is formed by discontinuous chopped fiber group orientations in rubber.

The utility model is achieved in that the synthetic staple that pretreatment is good is incorporated in the rubber mass equably, make discontinuous chopped fiber group orientations in rubber by orienting device, make the rubber combined body of orientated short fiber of different modulus under high strength, the low deformation, all make rubber tread, cushion layer, carcass and the bead part of tire with the rubber combined system of this orientated short fiber, then with bead coil by adding thermochemical crosslinking, positioning becomes the agricultural radial-ply tyre of short-fiber rubber complex of the present utility model.Promptly this tire integral body directly is made of rubber combined body of orientated short fiber and bead coil.According to tire STRESS VARIATION and mechanical property requirements in the process of moving, design the aggregated structure of discontinuous chopped fiber group in tire flexibility body matrix and be: be orientated and locate by the tire radial direction at tyre surface; Be orientated and locate by the tire circumferential direction at cushion layer; Be orientated and locate by the terrestrial meridian direction at carcass; Be orientated and locate by mutually vertical two-dimensional directional direction at tyre bead.

This novel tire has been cancelled buffering cord and buffering film, the cross-ply of carcass and the chafer and the tyre bead filler gum of bead part of former diagonal tyre cushion layer; In other words, it has cancelled cord of the steel wire of radial tire undertread or cord, carcass etc.

Fig. 1 is chopped fiber radial agricultural tyre structure and section.

The utility model is compared with traditional oblique agricultural tire has following beneficial effect:

1, consisted of by the rubber combined body of orientated short fiber and wire loop owing to whole tire, by changing

Be cross-linked to form strong entity, so under the movement load effect, the whole wheel

But the tire deform in same pace, internal stress distribution is even, and thermal friction power is very little (can be ignored not

Meter), thereby reduce living heat effectively, greatly reduced the rolling resistance of tire,

Good energy saving property;

2, the rubber combined body of orientated short fiber makes the novel tire peripheral distortion little, to the land slide phase

To reducing, ground contact area is big simultaneously, thereby the tyre surface resistance to abrasion has than bias-ply tire

Significantly improve;

3, this novel tire has solved tread chunking effectively, has fallen the piece phenomenon, the anti-simultaneously energy that pierces through

Power obviously improves;

4, this novel tire has avoided that shoulder is empty, shoulder splits and quality problems such as delamination.

Simultaneously, this utility model also has the following advantages:

1, this novel tire rolling is soft steadily, and through performance and ride comfort performance are good;

2, this novel tire mechanical structure is reasonable, forms simply, and manufacturing process is easy, the production energy

The power height, and help continuous automatic production;

3, this novel tire productive costs and the cost of raw material are all lower.

Below be embodiment of the present utility model:

Embodiment:

Adopt chopped fiber radial-ply tyre of the present utility model to be used for farm tractor, tire comprises tyre surface A, cushion layer B, carcass C and four parts of tyre bead D, tire integral body directly is made of rubber combined body 1 of orientated short fiber and bead coil 2, the rubber combined body 1 of orientated short fiber is formed by discontinuous chopped fiber group orientations in rubber, and the aggregated structure of chopped fiber group in tire flexibility body matrix is: press the tire radial direction at tyre surface A and be orientated and locate; Press at cushion layer B that the tire circumferential direction is orientated and locatees; Press at carcass C that the terrestrial meridian direction is orientated and locatees; Be orientated and locate by mutually vertical two-dimensional directional direction at tyre bead C.

Prepared chopped fiber radial-ply tyre is compared with conventional tire, and reduce the tire internal friction and give birth to heat and reduce rolling resistance, good energy saving property, but fuel-economizing about 5%, the productive costs and the cost of raw material reduce 20%-30%.

Claims

1. agricultural radial-ply tyre, comprise tyre surface, cushion layer, carcass and four parts of tyre bead, it is characterized in that this radial-ply tyre integral body directly is made of rubber combined body of orientated short fiber and bead coil, wherein the rubber combined body of orientated short fiber is formed by discontinuous chopped fiber group orientations in rubber.

2. tire as claimed in claim 1 is characterized in that the aggregated structure of described discontinuous chopped fiber group in tire flexibility body matrix is: be orientated and locate by the tire radial direction at tyre surface; Be orientated and locate by the tire circumferential direction at cushion layer; Be orientated and locate by the terrestrial meridian direction at carcass; Be orientated and locate by mutually vertical two-dimensional directional direction at tyre bead.