CN109050171B

CN109050171B - Off-road tyre

Info

Publication number: CN109050171B
Application number: CN201811023600.4A
Authority: CN
Inventors: 马新军; 李大鹏; 王代华; 王宝凯; 闫志猛
Original assignee: Sailun Jinyu Group Co Ltd
Current assignee: Sailun Jinyu Group Co Ltd
Priority date: 2018-09-04
Filing date: 2018-09-04
Publication date: 2023-07-18
Anticipated expiration: 2038-09-04
Also published as: CN109050171A

Abstract

The invention provides an off-road tire, wherein a crown block is arranged in a 25% area of the center of a crown, the crown block consists of alternately arranged double blocks and single blocks, and groove bottom reinforcing blocks are respectively arranged on opposite angles of the double blocks and opposite angles of the single blocks; shoulder pattern blocks are arranged on two sides of the crown pattern block, each shoulder pattern block consists of an arrow pattern block and a strip pattern block which are alternately arranged, and a boulder adhesive tape is arranged between each arrow pattern block and each strip pattern block; the tail ends of the shoulder pattern blocks extend to the sidewalls to form shoulder pattern blocks, the thicknesses of the shoulder pattern blocks are gradually thickened from the lower shoulder to the tail ends of the pattern blocks, two adjacent rows of shoulder pattern blocks are bent and crossed at the tail ends, the tail ends of the shoulder pattern blocks are inwards grooved to form arc grooves, and the tail ends of the shoulder pattern blocks form steps from high to low. The off-road tire has increased traction performance on off-road pavement, improved grip on paved pavement and desert, and can cope with various complex outdoor pavement.

Description

Off-road tyre

Technical Field

The invention belongs to the technical field of tires, and particularly relates to an off-road tire.

Background

The off-highway road surface is a non-paved road surface, and is mainly a road surface with poor quality such as a soil road, a gravel road and the like or a road surface without road surface at all. MT tires are tires mainly used for special road surfaces such as mud lands, broken stones, marshes and the like. The traditional MT tire mainly improves the grip force on the road surface of a soil road and a gravel road through the design of smaller sea Liu Bi and large pattern blocks, but has insufficient grip force in the desert, poor dry braking and operability, and low trafficability in the desert which is easy to sink into sand. The traditional MT adds pattern blocks under the shoulder to enhance the anti-collision and puncture performance, but can not effectively improve the traction performance of the tire. With the rise of off-road culture, customers are pressing to demand a tire product that can be used on a variety of complex roadways.

Disclosure of Invention

Aiming at the problems, the invention provides the off-road tire, which can effectively improve traction force and grip in desert by reasonably designing the pattern and volume ratio of the crown part and the special pattern under the shoulder on the premise of ensuring good grip performance on the road surface of a soil road and a broken stone road.

The invention is realized by the following technical scheme:

the cross-country tire is characterized in that a crown pattern block is arranged in a 25% area of the center of a crown, the crown pattern block consists of alternately arranged double pattern blocks and single pattern blocks, the double pattern blocks are in a central symmetrical pattern and consist of two irregular pattern blocks which are respectively arranged on two sides of a central line, and groove bottom reinforcing blocks are respectively arranged on the opposite angles of the double pattern blocks and the opposite angles of the single pattern blocks; shoulder pattern blocks are arranged on two sides of the crown pattern block, each shoulder pattern block consists of an arrow pattern block and a strip pattern block which are alternately arranged, the arrow part of each arrow pattern block faces to the crown, and a boulder adhesive tape is arranged between each arrow pattern block and each strip pattern block; the tail ends of the shoulder pattern blocks extend to the sidewalls to form shoulder pattern blocks, the thicknesses of the shoulder pattern blocks gradually thicken from the lower shoulder to the tail ends of the pattern blocks, two adjacent rows of shoulder pattern blocks are bent and crossed at the tail ends, the tail ends of the shoulder pattern blocks are ditched inwards to form arc grooves, and the tail ends of the shoulder pattern blocks form steps from high to low.

Further, the crown blocks include three different pitch widths.

Further, the under-shoulder blocks include three different pitch widths.

Further, the area pattern volume ratio of 25% of the center of the crown is 60% -62%.

Further, the thickness of the under-shoulder block gradually transitions from 5mm to 7mm from under-shoulder to the block end.

Further, the end of the under-shoulder block forms 5 steps from high to low.

Compared with the prior art, the invention has the following beneficial effects:

the design of the crown pattern blocks, the shoulder pattern blocks and the under-shoulder pattern blocks enables the traction performance of the off-road tire on off-road surfaces to be increased, the grip of the off-road tire on paved roads and deserts to be improved, and the off-road tire can cope with various field complex roads such as soil roads, gravel roads, mud lands, deserts and the like.

Drawings

Fig. 1 is a pattern design of an off-road tire.

1, double pattern blocks; 2. a single block; 3 and 4 are trench bottom reinforcing blocks; 5. arrow-shaped pattern blocks; 6. a bar block; 7. a stone-flicking adhesive tape; 8 and 9 are under-shoulder blocks; 10. an arc-shaped groove; 11. a step.

Detailed Description

The invention will be described in further detail with reference to specific embodiments and drawings.

Examples

The present embodiment provides an off-road tire, which includes a tread, on which blocks are distributed, and as shown in fig. 1, a crown block is provided in a bar-shaped region of 25% of the tread crown center (centered on a center line, and a lateral width of 25% of the running surface width), the crown block being composed of double blocks 1 and single blocks 2 alternately, the double blocks 1 being a center symmetrical pattern composed of two irregular blocks separately provided on both sides of the center line. The crown blocks include three different pitch widths, with the pitches of different widths alternating. The area pattern volume ratio of 25% of the center of the crown is between 60% and 62%. The design can effectively improve the dry land performance of paved roads and the high trafficability in deserts. The opposite angles of the double pattern blocks 1 are provided with groove bottom reinforcing blocks 3, and the opposite angles of the single pattern blocks 2 are provided with groove bottom reinforcing blocks 4. The ditch bottom reinforcing block enhances the puncture resistance.

Shoulder pattern blocks are arranged on two sides of the crown pattern block, the shoulder pattern blocks are composed of arrow pattern blocks 5 and strip pattern blocks 6 which are alternately arranged, and arrow parts of the arrow pattern blocks 5 face the crown. And a stone elastic strip 7 is arranged between the arrow-shaped pattern block 5 and the strip-shaped pattern block 6. The arrow-shaped pattern blocks can improve the rigidity of the shoulder and ensure the free control of the complex road surface in the field. The stone-flicking rubber strip can prolong the service life of the tire.

The tail ends of the shoulder pattern blocks extend to the tire side to form shoulder pattern blocks 8 and 9, the thickness of the shoulder pattern blocks gradually thickens from 5mm to 7mm from the shoulder to the tail ends of the pattern blocks, the thickening design ensures that the shoulder has lower heat generation, the thickness of the widest part of the tire is thickest, and the lateral traction performance is improved while the anti-collision performance is enhanced.

The under-shoulder blocks include three different pitch widths, with the pitches of the different widths alternating. Adjacent rows of under-shoulder blocks 8 and 9 are curved and crossed at their ends, with the under-shoulder block ends forming inward arcuate grooves 10. When the road surface is in soft road surface running, the crossed pattern blocks can generate downward radial force to compress the road surface in advance, and the crown pattern blocks run on the compressed road surface, so that the grip force is effectively improved. The arc-shaped grooves 10 can enlarge the groove volume between the shoulder blocks 8 and 9, so that the soil entering the grooves is increased, the compressed volume is increased, and the ground grabbing force is improved.

The end of the under-shoulder block forms 5 steps 11 from high to low. The design can effectively compress the road surface when the vehicle runs on a soft road surface, and the grip is improved. The design of the layer steps can weaken external force impact layer by layer, improve the safety performance of field driving, and improve the lateral traction performance during rock climbing.

The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. The cross-country tire is characterized in that a crown block is arranged in 25% of the area of the center of a crown, the crown block consists of alternately arranged double blocks and single blocks, the double blocks are in a central symmetrical pattern and consist of two irregular blocks which are respectively arranged on two sides of a central line, and groove bottom reinforcing blocks are respectively arranged on the opposite angles of the double blocks and the opposite angles of the single blocks; shoulder pattern blocks are arranged on two sides of the crown pattern block, each shoulder pattern block consists of an arrow pattern block and a strip pattern block which are alternately arranged, the arrow part of each arrow pattern block faces to the crown, and a boulder adhesive tape is arranged between each arrow pattern block and each strip pattern block; the tail ends of the shoulder pattern blocks extend to the sidewalls to form shoulder pattern blocks, the thicknesses of the shoulder pattern blocks gradually thicken from the lower shoulder to the tail ends of the pattern blocks, two adjacent rows of shoulder pattern blocks are bent and crossed at the tail ends, the tail ends of the shoulder pattern blocks are ditched inwards to form arc grooves, and the tail ends of the shoulder pattern blocks form steps from high to low.

2. The off-road tire of claim 1, wherein the crown blocks comprise three different pitch widths.

3. The off-road tire of claim 1, wherein the under-shoulder blocks comprise three different pitch widths.

4. An off-road tire as in claim 1, wherein the 25% area pattern volume ratio of the crown center is 60% -62%.

5. An off-road tire as in claim 1, wherein the thickness of the under-shoulder blocks gradually transitions from 5mm to 7mm from under-shoulder to block ends.

6. The off-road tire of claim 1 wherein the end of the under-shoulder block forms 5 steps from high to low.