Background technology
Along with manned vehicle developing rapidly and universal, the tire tread update speed of its assembling is constantly accelerated, and function segmentation, special characteristics are more outstanding, as by being divided into season such as all-year tire, summer tire, Tire used in winter, mud-and-snow tyre etc.Generally adopt cros-rib tread to combine with circumferential pattern to the design of tire tread pattern, the performances such as the decorative pattern of design is wear-resisting except considering, adherence properties, drainage, also will consider the aesthetic property of tire, and require tire to have stable startup and deceleration and stopping performance.Studies show that, under identical condition, the resistance to abrasion of cros-rib tread is better than the performance of circumferential pattern with braking ability; But the lateral sliding of cros-rib tread is larger than circumferential pattern, and the oil consumption of cros-rib tread is large, easily falls fast.So common design is that cros-rib tread is combined with by groove with circumferential pattern.
China's tire industry development is swift and violent, the design of tire also more and more is tending towards hommization, especially the classification of manned vehicle radial-ply tyre is more careful to cause tire, decorative pattern is as the important design factor of tire, progressively formed the difference in functionality type, as the symmetrical decorative pattern in snowfield tire decorative pattern, all season tyre (comprising undirected decorative pattern, single guiding decorative pattern), non-symmetrical design etc., the speed step of UHP (very-high performance radial-ply tyre) constantly raises at present.The tread design quality is the main factor that affects tire snowfield, ice face and main line face maneuvering performance, but the balance tyre performance also becomes a difficult problem of tire tread pattern design phase under several pavement conditions, the winter Tire used in winter has good performance under ice road surface or snow pavement conditions, but is difficult to significantly improve simultaneously the handling under ice road surface and snow pavement conditions.
Summary of the invention
Technique effect of the present invention can overcome defects, and a kind of radial tire tread pattern of passenger car is provided, and it can be for vehicle provides larger braking force, and has good road-holding property and road surface comformability, excellent combination property.
For achieving the above object, the present invention adopts following technical scheme: the centerline of its tyre surface is provided with central longitudinal to circular groove, central longitudinal is divided into symmetrical two parts to circular groove with tyre surface, central longitudinal is provided with respectively center running lug, sidepiece pattern block, pattern block on tire shoulder from inside to outside successively to the circular groove left and right sides, center running lug is vertical integral type pattern block, between center running lug and sidepiece pattern block by main vertical circular groove interval, between sidepiece pattern block and pattern block on tire shoulder by assistant longitudinal circular groove interval; Between adjacent both sides pattern block, by horizontal arc groove interval, an end of arc groove originates in main vertical circular groove, and the other end terminates in pattern block on tire shoulder, and arc groove is communicated with the assistant longitudinal circular groove.
Center running lug adopts firm one pattern block, elegant in appearance, adhesion value is good on dried wet road surface, can provide enough braking forces for vehicle, guarantee the stable of when running at high speed performance, center running lug has increased the rideability on effective grounding area and ice road surface.The roomy central longitudinal in middle part is equipped with sidepiece, the vertical circular groove of the open master of shoulder, assistant longitudinal circular groove to circular groove, can bring into play outstanding drainage performance on the wetland face that forms after snow melt.Main vertical circular groove, assistant longitudinal circular groove are roomy tortuous groove, effectively increase drainage space between tire and road surface, the spoil disposal draining that is conducive to travel on the rainy day muddy road surface, because groove is wider, to guaranteeing that the tire tread form after tyre inflating plays an important role, prevent the tire irregular wear, the air that overstocks in travelling is discharged glibly, be conducive to reduce noise.Arc groove and circumferential pattern ditch can reduce concentrating of center running lug pressure in the tire running process, can also make the overstocked discharge in the tire running process, reduce noise.Arc decorative pattern cutter groove runs through one, and is natural and tripping, effectively increases drainage space between tire and road surface, the self-cleaning that is conducive to travel on the rainy day muddy road surface.Tyre surface is with the longitudinal groove headed by five longitudinal furrows, and the pattern block that in addition varies in size and being interspersed can reduce the noise that pattern block sends greatly when kiss the earth.
All be provided with the fine groove of inclination on center running lug, sidepiece pattern block, pattern block on tire shoulder, the fine groove undulate.
Fine groove adopts depth groove arranged spaced, namely adopts dark, shallow, dark, SC configuration, and rigidity and softness are combined closely, and bring comprehensive ice face performance, uniform wear and ride comfort.
Arc groove is diminished to its degree of depth of clearing end gradually by initiating terminal.Tyre surface rigidity from the center running lug to the pattern block on tire shoulder improves gradually, the ratio of the rigidity of center running lug, sidepiece pattern block, pattern block on tire shoulder is followed successively by 1: 1.4-1.6: 1.7-1.9, forming rational ground pressure distributes: the middle part pattern block is relatively soft, be conducive to improve the ground pressure at tire middle part, increase the broken snow ability of tyre surface ground connection and craspedodrome performance; Sidepiece pattern block rigidity improves the common partially soft characteristics of tyre surface both sides flank of Tire used in winter of improving; Tyre revolution to the time ground pressure partly transfer to shoulder, improve shoulder pattern block rigidity and be conducive to driving stability.
Central longitudinal all is provided with stepped projection to the bottom of trench of circular groove, main vertical circular groove, and projection has drag function, and more deep interlock snow face when tire is travelled on accumulated snow darker ground catches fresh, soft accumulated snow to improve tractive property.
The side of center running lug, sidepiece pattern block, pattern block on tire shoulder all arranges the zig-zag longitudinal groove, can form the snow post, improves tractive force.
The pattern block on tire shoulder outside is provided with the cutter groove, is provided with two cutter grooves between two adjacent arc grooves, is communicated with by the Z-type groove between this two cuttves groove.Its cutter groove has the tiny trench design of the three-dimensional warp architecture of sharp edges: this groove on ground plane continuous intersection " Z " type design and have two kinds of functions in the similar engaged gears design of ground plane vertical surface: the one, when rough road runs into contact, microgroove is closed up automatically form a complete colored piece to bear immense pressure; The 2nd, when ice and snow road travels, sharp slot wedge can be caught the road surface again, increase earth-grasping force and tractive force, and this kind design can increase tiny groove number can significantly not reduce again the rigidity of pattern block simultaneously, the distortion of pattern block reduces when tire startup, brake or turning, ground contact area increases, and tire friction force on ice road surface and main line face improves.
Groove and pattern block optimum position are arranged, and in conjunction with its width, angle and microgroove ratio, scientific allocation guarantees that each pattern block hardness of tire is impartial, makes its braking driving stiffness and cornering stiffness Proper Match, improves the comformability of tire snowfield.
The specific embodiment
As shown in Figure 1, the centerline of tire protector of the present invention is provided with central longitudinal to circular groove 1, central longitudinal is divided into symmetrical two parts to circular groove 1 with tyre surface, central longitudinal is provided with respectively center running lug 2, sidepiece pattern block 4, pattern block on tire shoulder 6 from inside to outside successively to circular groove 1 left and right sides, center running lug 2 is vertical integral type pattern block, by main vertical circular groove 3 intervals, pass through assistant longitudinal circular groove 5 intervals between sidepiece pattern block 4 and pattern block on tire shoulder 6 between center running lug 2 and sidepiece pattern block 4; Between adjacent both sides pattern block 4, by horizontal arc groove 7 intervals, an end of arc groove 7 originates in main vertical circular groove 3, and the other end terminates in pattern block on tire shoulder 6, and arc groove 7 is communicated with assistant longitudinal circular groove 5.
All be provided with the fine groove 10 of inclination on center running lug 2, sidepiece pattern block 4, pattern block on tire shoulder 6, fine groove 10 undulates, fine groove 10 adopts depth groove arranged spaced, and deep trench is 8mm, and shallow trench is 4mm.。
Arc groove 7 is diminished to its degree of depth of clearing end gradually by initiating terminal.6 tyre surface rigidity improves gradually from center running lug 2 to pattern block on tire shoulder.The ratio of the rigidity of center running lug 2, sidepiece pattern block 4, pattern block on tire shoulder 6 is followed successively by 1: 1.5: 1.8.
As shown in Figure 2, central longitudinal all is provided with stepped protruding 11 to the bottom of trench of circular groove 1, main vertical circular groove 3, and the height of projection 11 is 1.8mm.
The side of center running lug 2, sidepiece pattern block 4, pattern block on tire shoulder 6 all arranges zig-zag longitudinal groove 12.Pattern block on tire shoulder 6 outsides are provided with cutter groove 8.Be provided with two cutter grooves 8 between two adjacent arc grooves 7, be communicated with by Z-type groove 9 between this two cuttves groove.