CN110509723A - Agricultural tyre - Google Patents

Abstract

The invention discloses a kind of agricultural tyres, including tyre surface, sidewall and tyre bead；From tyre surface bottom along pattern block is formed radially outward, two pattern blocks that are symmetrical and being circumferentially staggered are one group of decorative pattern unit at left and right sides of tire equatorial plane, and tire is circumferentially placed equidistant with several groups decorative pattern unit.Pattern block is made of patterned tread section, decorative pattern sidewall section；The head of patterned tread section forms double angles using two intersection inclined-planes and with tire axial；Decorative pattern sidewall section is made of transition part, work department and ending portion, and the shovel mud face setting of work department is a plane or an arc surface, and is formed with tire rotating direction into mud angle；Slot is set on pattern block, and pattern block is similar triangle stress area in tread edge region division by slot.In this way, tire ensures that tire has excellent hauling ability and endurance quality under underwater cultivation environment；Especially when tire is fallen into there is excellent self-saving ability of getting rid of poverty in mud.

Description

Agricultural tyre

Technical field

The present invention relates to the technical fields of tire, particularly relate to a kind of agricultural tyre.

Background technique

Agricultural tyre generally refers to the tire for being used in tractor, agricultural machinery and agricultural vehicle, this mechanical and vehicle Usually for the various field low speed operations such as farmland, sugarcane field or the short distance low speed hauling operation of agricultural operation area.It is different to adapt to The operating environments such as farmland place, such as paddy field, nonirrigated farmland, soft sandy land, soil moisture are big, more muddy field place, agriculture Industry tire tread is usually provided with substantially in bar shaped block-type tread, to give full play to performance of the tire in farm work.

Under normal conditions, the agricultural tyre tread block height for being used in nonirrigated farmland or sand ground is shallower, to meet tire With certain flotation property while hauling ability, the mark compacting soil that avoids tire from rolling；It is outstanding suitable for muddy ground It is that the agricultural tyre in paddy field then requires block height deeper, guarantees that tire is fallen into mud and still is able to provide necessary traction Power to maintain tire continue move ahead and the necessary ability of getting rid of poverty.

It is a kind of for agricultural tyre that application publication number is that the patent of invention earlier application of 108349317 A of CN discloses Tyre surface comprising axial ends from the radially outward protrusion in the bottom surface of tyre surface, from the center portion of tyre surface towards tyre surface with Given tilt angle extends and in the side of the equatorial plane relative to tire and the other side circumferentially with given interval Alternatively distributed multiple pattern blocks.Pattern block includes entering into face, when from circumferential cross-section, wherein at least one pattern block Enter into face include on its side wall transition point radial outside intersected with each other the first concave surface and radially inner side it is second recessed Face.The pattern block setting of this agricultural tyre disclosed in the application for a patent for invention can not be suitable for the mud such as paddy field in tyre surface Farmland occasion can not provide the ability of getting rid of poverty that effective traction is fallen into tire in mud in the paddy-field-working of muddy water mixing.

The utility model patent of Patent No. ZL 201220272632.X discloses one kind and is related to paddy agriculture tire, Tire tread is made of the convex block of several L-shaped, and convex block is made of longer bar shaped portion and shorter block portion, each convex block point It is staggered at two rows of, opposite circumferential line bilateral symmetry and mutually；The bar shaped portion opposing tire direction of advance of convex block have 40 °~ 80 ° of angle；There are 10 °~40 ° of decorative pattern anterior angle and 5 °~20 ° of decorative pattern relief angle in convex block bar shaped portion, and decorative pattern anterior angle is greater than relief angle； The angle of decorative pattern relief angle of the bar shaped portion of convex block from tire shoulder to tread center reduces slowly；The block portion width of convex block is greater than bar shaped The maximum width in portion simultaneously remains unchanged.Though this paddy agriculture tire of the patent disclosure can be suitable for paddy-field-working environment, But pattern block is also only arranged in tyre surface, sticks in greasy mud when tire is fallen into, provides for tire and continue forward tractive force all Tread contour is concentrated on, is easy the phenomenon that stress concentration and breach occurs in the position that pattern block and tyre surface bottom are mutually linked； Simultaneously when tire falls into mud, due to pattern block is positioned only at tyre surface and tire sidewall does not have pattern block, tire generally occurs within Skid phenomenon can not effectively realize self getting rid of poverty for tire.

Though conventional paddy field agricultural tyre can be suitable for paddy field, pattern block is also only arranged in tyre surface, works as tire It falls into and sticking in greasy mud, provided for tire and continue forward tractive force and all concentrate on tread block, therefore be easy in decorative pattern There is stress and concentrates the phenomenon that breach in the position that block and tyre surface bottom are mutually linked, influences the durable usability of agricultural tyre Energy；It also can not effectively realize that self is got rid of poverty when tire falls into and has skidded phenomenon in mud simultaneously.Therefore, conventional agricultural Tire can not take into account the hauling ability and endurance quality of tire comprehensively under paddy-field-working environment；It especially falls into de- in mud Tired self-saving ability also has room for promotion.

Summary of the invention

One kind is provided it is an object of the invention to overcome the deficiencies in the prior art can take into account wheel under paddy-field-working environment The hauling ability and endurance quality of tire, while the agricultural tyre for falling into the self-saving ability of getting rid of poverty in mud can be promoted.

In order to achieve the above objectives, solution of the invention is:

A kind of agricultural tyre, including tyre surface, sidewall and tyre bead；From tyre surface bottom along pattern block is formed radially outward, spend Line block is crossed from tire equatorial plane side to the other side and reverse tire rotating direction tilts to extend and cross tread edge and prolong It extending to sidewall and terminates at sidewall, symmetrically arranged two pattern blocks are one group of decorative pattern unit at left and right sides of tire equatorial plane, Two pattern blocks of same decorative pattern unit are along the circumferentially staggered setting of tire, and tire is circumferentially placed equidistant with several groups decorative pattern unit, respectively Pattern block is made of patterned tread section, decorative pattern sidewall section, and each pattern block includes positioned at the heads of tread segments, shoulder and being located at tire The head in transition part, work department and the ending portion of side section, patterned tread section is formed using two intersection inclined-planes and with tire axial Double angles；The transition part of sidewall section has transition face, and the work department of decorative pattern sidewall section has shovel mud face, and shovel mud face is set as plane Or cambered surface, the outside being mutually linked with shovel mud face are guide face；Slot is set on each pattern block, and slot is by pattern block in tread edge area Domain is divided into triangle stress area.

Further, the end face of the head front end of the pattern block uses two intersection inclined-planes, and both ends of the surface and pattern block The intersection and tire axial of ground plane are respectively formed certain angle, and the angle is preferably 10 °~30 °.

Further, the pattern block sidewall section is located at the sidewall area on the outside of tread edge, and pattern block sidewall section is by mistake Portion, work department and ending portion is crossed to constitute.It is connected on the inside of the transition part of pattern block sidewall section with the shoulder of tread segments；The mistake of sidewall section It crosses on the outside of portion and is connected with the work department of sidewall section, the transition face of transition part is respectively set to cambered surface and phase with the shovel mud face of work department It hands over.

Further, shovel mud face tangent line and the tire rotating direction for shoveling mud face corresponding with transition face intersection formed into Mud angle, entering mud angle is preferably -10 °~20 °.

Further, the transition face in the corresponding transition face in intersection and shovels between the respective tangent line in mud face with shovel mud face Shovel mud angle is formed, shovel mud angle is greater than into mud angle；And shovel mud angle is preferably 60 °~75 °.

Further, the ending portion of the pattern block is with reverse tire rotating direction to tilt extension and terminate at sidewall area Interior, the ending portion of pattern block forms angle along the ground connection edge of tire rotating direction front end and reverse tire rotating direction, preferably Ground, angle are set as 45 °~90 °.

Further, the slot of the pattern block crosses tread edge and is divided into the tread portion of slot and the sidewall of slot Point, the volume of the side wall portion of slot is greater than the volume of the tread portion of slot.

Further, the transition face of the pattern block sidewall section and the intersection and tread edge of pattern block ground plane form one and hand over Point a, the shovel mud face of pattern block sidewall section and the intersection of guide face and decorative pattern ground plane are crossed to form an intersection point b, between two intersection points Form a virtual line segment；The distance of center to the virtual line segment of the front end ground connection edge line of the side wall portion of slot is W1, slot Side wall portion rear end ground connection edge line center to the rear end of pattern block ground plane ground connection edge line distance for W2, Intersection point a to pattern block tread segments ground plane rear end ground connection edge line distance be W3, it is preferable that W1=(0.3~0.5) W3, W2=(0.5~0.6) W3.

Further, the ground plane of the work department of the pattern block sidewall section is the plough shape cambered surface with dog-ear, and shovel mud face is Cambered surface or plane, the outside being mutually linked with shovel mud face is guide face, and guide face is cambered surface.

Further, the intersection and tire rotating direction of the shovel mud face and ground plane form angle, which is preferably 30 ° ~60 °.

Further, patterned tread section and decorative pattern sidewall section are arranged using drop radially, the tire of pattern block tread segments Face edge is preferred to the radial height between the ground plane of pattern block sidewall section and the intersection of the tire shoulder side wall of pattern block tread segments For pattern block tread segments bottom surface to 50%~65% of the radial height between the ground plane of pattern block tread segments.

After adopting the above structure, the pattern block of agricultural tyre of the present invention has directionality, in motion, the head of pattern block At first with ground face contact, the shoulder of pattern block follow after head with ground face contact, when tire in underwater cultivation environment row When sailing, the transition face of sidewall section and shovel mud face can be cut in muddy water, to provide the hauling ability of progressive rolling movement for tire；When Tire is fallen into mud when having skidded phenomenon, and sidewall section can effectively provide the hauling ability of tire sidewall, the tyre surface of pattern block Section and sidewall section two parts act on offer simultaneously and tire are promoted to continue forward driving force, and tire is effectively helped to realize that self is de- It is tired so that agricultural tyre of the present invention can ensure that tire has excellent hauling ability and endurance quality under underwater cultivation environment； Especially when tire is fallen into there is excellent self-saving ability of getting rid of poverty in mud.

Detailed description of the invention

Fig. 1 is agricultural tyre first embodiment schematic perspective view of the present invention；

Fig. 2 is agricultural tyre first embodiment decorative pattern deployed configuration schematic diagram of the present invention；

Fig. 3 is agricultural tyre first embodiment pattern block stereochemical structure enlarged diagram of the present invention；

Fig. 4 is agricultural tyre second embodiment side perspective structural schematic diagram of the present invention；

Fig. 5 is agricultural tyre second embodiment pattern block side perspective structure enlargement diagram of the present invention.

Specific embodiment

In order to preferably illustrate a specific embodiment of the invention, first the orientation of tire is defined.Level side in Fig. 2 To be axial, vertical direction is that circumferentially, vertical paper direction is radial；C.L. it indicates tire equatorial plane, is indicated close to C.L. Inside or inner end；Outside or outer end are indicated far from C.L.；Li indicates tire tread edge；The rolling square of arrow expression tire To direction tire rotating direction is front end, and reverse tire rotating direction is rear end；Hereinafter identical number or letter or serial number Indicate the same or similar figure or the same or similar structure.

A kind of agricultural tyre, including tyre surface 10, sidewall 20 and tyre bead 30 are illustrated as shown in Figure 1, Figure 2；10 bottom of tyre surface along Angled radially outward contraction forms pattern block 11 and pattern block 12, and pattern block 11 and pattern block 12 are arranged in tire equatorial plane C.L. the left and right sides is in symmetric mode and along the circumferentially-spaced certain distance that is staggered of tire.Pattern block 11 and pattern block 12 respectively from The other side is crossed in the side of tire equatorial plane C.L. and reverse tire rotating direction tilts to extend and cross tread edge Li and prolong It extends to sidewall 20 and terminates at sidewall 20.Pattern block 11 and pattern block 12 are respectively by tread segments 40 and sidewall 50 two parts structures of section At pattern block 11 and pattern block 12 are in section of the section between tread edge Li for tread segments 40, on the outside of tread edge Li For sidewall section 50.Pattern block 11 includes head 111 in 40 section of tread segments, shoulder 112 and is located at sidewall 50th area of section Transition part 113, work department 114 and ending portion 115 in section；Similarly, pattern block 12 includes being located in 40 section of tread segments Head 121, shoulder 122 and transition part 123, work department 124 and ending portion 125 in 50 sections of section of sidewall.Due to flower Line block 11 and pattern block 12 are symmetrical set about tire equatorial plane C.L., therefore, hereinafter will be apparent from pattern block 12, And the embodiment of pattern block 11 will be carried out according to pattern block 12.

As shown in Fig. 2, pattern block 12 is to be formed by bottom surface 130 along the angled radially outward ground plane 120 that is contracted to.Decorative pattern The heads 121 of 12 tread segments 40 of block divides the head 121 of the tread segments 40 of pattern block 12 to be across tire equatorial plane C.L. 120 profile of ground plane of two parts, head 121 is substantially parallel with tire equatorial plane C.L., and shoulder 122 is in tire equator Between plane C.L. and tread edge Li；120 profile of ground plane of shoulder 122 substantially with tire equatorial plane C.L. tilt and Extend toward reverse tire rotating direction, in this way, pattern block 12 has directionality, the head 121 of pattern block 12 connects with ground at first Touching, the shoulder 122 of pattern block 12 follow after head 121 with ground face contact.Tire travels in underwater cultivation environment, to mention Broken mud effect of the tire in mud is risen, the end face f of 121 front end of head of pattern block 12 uses two intersection inclined-planes, and The intersection and tire axial of both ends of the surface f and pattern block ground plane 120 are respectively formed certain angle γ, two angle γ and constitute double Angle, angle γ, which is preferably 10 °~30 °, to be advisable.Generally by the radial direction between pattern block bottom surface 130 to pattern block ground plane 120 Distance referred to as pattern depth；The pattern depth of usual paddy field agricultural tyre sets deeper, the end of 12 head of pattern block, 121 front end The intersection of face f and pattern block ground plane 120 and double angle γs setting that tire axial is formed are too big, then ground plane 120 is in radial direction On be excessively sharp, though the wear resistance decrease of the broken good pattern block 12 of mud effect and influence the endurance quality of tire；Conversely, decorative pattern Double angle γs setting that the end face f of 12 head of block, 121 front end and the intersection of pattern block ground plane 120 and tire axial are formed is too Small, then the excessively round blunt radially of ground plane 120, the broken mud less effective of pattern block 12, tire is under underwater cultivation environment Hauling ability decline.

Further, as shown in Fig. 2, 12 sidewall of pattern block section 50 is located at 20 region of sidewall on the outside of tread edge Li.Flower 12 sidewall of line block section 50 is made of transition part 123, work department 124 and ending portion 125.The transition part of 12 sidewall of pattern block section 50 123 insides are connected with the shoulder 122 of tread segments 40；123 outside of transition part of sidewall section 50 and the work department 124 of sidewall section 50 are held in the mouth It connects.It is provided with transition face 1231 on transition part 123, shovel mud face 1241, transition face 1231 and shovel mud face are provided in work department 124 1241 are respectively set to cambered surface and intersect, and the cambered surface center of curvature in transition face 1231 and shovel mud face 1241 is revolved away from the rolling of tire Turn center.When tire in underwater cultivation environment when driving, sidewall section 50 transition face 1231 and shovel mud face 1241 can cut In muddy water, to provide the hauling ability of progressive rolling movement for tire；It is of particular importance that being had skidded when tire is fallen into mud When phenomenon, sidewall section 50 can effectively provide the hauling ability of tire sidewall, the tread segments 40 of pattern block 12 and sidewall section 50 two Dividing while acting on offer promotes tire to continue forward driving force, effectively tire is helped to realize that self is got rid of poverty.Shovel mud face 1241 with The tangent line and tire rotating direction in the corresponding shovel mud face 1241 in 1231 intersection of transition face are formed into mud angle α, and it is preferred to enter mud angle α For -10 °~20 ° (specifying clockwise angle herein is negative angle, and counterclockwise angle is positive-angle).Similarly, transition face 1231 It in the corresponding transition face 1231 in intersection and shovels between the respective tangent line in mud face 1241 with shovel mud face 1241 and forms shovel mud angle beta, Shovel mud angle beta should be greater than into mud angle α；And shovel mud angle beta is preferably 60 °~75 °.When shoveling, the setting of mud angle beta is too small, then 12 sidewall of pattern block Though section 50 can quickly be cut in mud, auxiliary traction performance is provided for 20 region of tire sidewall, simultaneously the abrasivity of sidewall section 50 It can decline, and then influence the endurance quality of tire；On the contrary, 12 sidewall of pattern block section 50 can not when shovel mud angle beta setting is too big Effectively in incision muddy water, self getting rid of poverty for tire can not be effectively realized when tire falls into muddy water having skidded.

In this way, working as agricultural tyre under underwater cultivation environment in normally travel, the pattern block 12 positioned at tread segments 40 can Normal hauling ability is provided；When tire is fallen into mud, the pattern block 12 positioned at tread segments 40 is got deeply stuck in mud, is now placed in The transition face 1231 of the pattern block 12 of sidewall section 50 and shovel mud face 1241 form broken mud forward and carry out mud shoveling action, with what is scooped up Mud, which is taken advantage of a situation, to be flowed through guide face 1242 and throws away tire completion and get rid of mud movement, is tire sidewall 20 during shoveling mud and getting rid of mud The sidewall section 50 of pattern block 12 propulsive force is provided, get rid of poverty forward advance to form tire on the drive wheels in 20 region of tire sidewall Power guarantees that agricultural tyre moves ahead under underwater cultivation environment.Meanwhile the ending portion 125 of pattern block 12 is with reverse tire rolling square To tilt extension and terminate in 20 region of sidewall.As shown in Fig. 2, the ending portion 125 of pattern block 12 along tire rolling square The ground connection edge 1250 of forward end and reverse tire rotating direction form angle ε, it is preferable that angle ε is set as (45 °~90 °) It is advisable, the ability of getting rid of poverty in pattern block 12 and influencing tire is trapped in avoid the muddy water that tire shovels out under steam.

As shown in Figure 1, 2, slot 116 is arranged in pattern block 11, and slot 126 is arranged in pattern block 12.Specifically, as shown in Figure 2,3, flower The slot 126 of line block 12 crosses tread edge Li and is divided into the tread portion 1261 of slot and the side wall portion 1262 of slot, slot The volume of side wall portion 1262 is greater than the volume of the tread portion 1261 of slot.Pattern block 12 sidewall section 50 transition face 1231 with The intersection and tread edge Li of 12 ground plane 120 of pattern block form an intersection point a, the shovel mud face 1241 of the sidewall section 50 of pattern block 12 It is crossed to form an intersection point b with the intersection of guide face 1242 and decorative pattern ground plane 120, forms a dummy line between intersection point a and intersection point b Section L；The distance of center to the virtual line segment L of the front end ground connection edge line of the side wall portion 1262 of slot 126 are W1, slot 126 Side wall portion 1262 rear end ground connection edge line center to pattern block 12 ground plane 120 rear end ground connection edge line Distance be W2, the distance of the rear end ground connection edge line of the ground plane 120 of the tread segments 40 of intersection point a to pattern block 12 is excellent for W3 Selection of land, W1=(0.3~0.5) W3, W2=(0.5~0.6) W3.In this way, pattern block 12 formed at 126 contour area of slot it is similar Triangle force area disperses pattern block 12 toward the shoulder 122 on the inside of tread edge Li in the stress of transition part 123, to drop The heat of pattern block 12 and then the endurance quality of promotion tire during low tire running.

Further, one group of decorative pattern is used as along tire equatorial plane C.L. symmetrical pattern block 11 and pattern block 12 Unit, decorative pattern unit are circumferentially evenly distributed with 12~14 groups in tire, and decorative pattern list number of tuples is too many, the decorative pattern trench culture formed between pattern block It is excessively narrow intensive to shovel out the channel of muddy water, tire can be hindered to continue to move ahead under underwater cultivation environment；Simultaneously as tyre surface Pattern block 11 and pattern block 12 extend from tyre surface 10 and cross the decorative pattern that tread edge Li extends to form monoblock type to sidewall 20 Pattern is shoveled when tire rolls by pattern block 11 and 12 sidewall of pattern block section 50 if decorative pattern unit is circumferentially arranged too intensively in tire The muddy water removed is easy to be trapped in sidewall 20, and then influences the performance of getting rid of poverty of tire.Conversely, decorative pattern list number of tuples is very little, pattern block As the element with ground face contact, the wear hardness of tire under steam is reduced, and the durable service performance of tire can decline.

Fig. 4, Fig. 5 illustrate agricultural tyre second embodiment perspective side structural schematic diagram of the present invention and pattern block side view is vertical Body structure enlargement diagram, including tyre surface 100, sidewall 20 and tyre bead 30.The pattern block 13 of tyre surface 100 is by 40 He of patterned tread section Decorative pattern sidewall section 60 is constituted, and patterned tread section 40 includes head 121 and shoulder 122, and the sidewall section 60 of pattern block 13 is by work department 224 and ending portion 225 constitute.The ground plane 140 of work department 224 is the plough shape cambered surface with dog-ear, and shovel mud face 2241 is cambered surface Or plane, the outside being mutually linked with shovel mud face 2241 are guide face 2242, guide face 2242 is cambered surface.In order to promote tire The broken mud effect travelled in paddy field promotes the auxiliary traction performance on sidewall, shovels the intersection and wheel in mud face 2241 and ground plane 140 Tire rotating direction forms angle δ, and angle δ, which is preferably 30 °~60 °, to be advisable.It is shown in Fig. 5 when shoveling mud face 2241 is plane, The angle δ in direction is determined in intersection and the tire rolling of shovel mud face 2241 and ground plane 140；When shoveling mud face 2241 is cambered surface, then mud is shoveled The angle δ that the tangent line and tire rotating direction in the shovel mud face 2241 corresponding with 140 intersection of ground plane of face 2241 are formed.Further Ground, to reduce running resistance of the tire in paddy-field-working, patterned tread section 40 and decorative pattern sidewall section 60 use fall radially Difference setting, as shown in figure 5, ground plane of the tread edge Li of the tread segments 40 of pattern block 13 to the sidewall of pattern block 13 section 60 140 and pattern block tread segments 40 tire shoulder side wall 2231 intersection between radial height H be preferably pattern block 13 tread segments (50%~65%) of 40 bottom surface 130 to the radial height between the ground plane 120 of the tread segments 40 of pattern block 13.In this way, The tread segments 40 of pattern block 13 and sidewall section 60 form drop setting radially, can reduce traveling of the tire in underwater cultivation Resistance, while can be cut in muddy water using the shovel mud face 2241 of decorative pattern sidewall section 60 when tire is fallen into mud, the mud shoveled out Water is taken advantage of a situation along guide face 2242 and is thrown away, and the ability of self getting rid of poverty of tire is promoted.

Above-described embodiment and diagram and non-limiting product form and style of the invention, any technical field it is common The appropriate changes or modifications that technical staff does it all should be regarded as not departing from patent category of the invention.

Claims (10)

1. a kind of agricultural tyre characterized by comprising tyre surface, sidewall and tyre bead；From tyre surface bottom along being formed radially outward Pattern block, pattern block is crossed from tire equatorial plane side to the other side and the inclination of reverse tire rotating direction extends and crosses tire Face edge extends to sidewall and terminates at sidewall, and symmetrically arranged two pattern blocks are one group of flower at left and right sides of tire equatorial plane Line unit, for two pattern blocks of same decorative pattern unit along the circumferentially staggered setting of tire, tire is circumferentially placed equidistant with several groups decorative pattern Unit, each pattern block are made of patterned tread section, decorative pattern sidewall section, each pattern block include positioned at the heads of tread segments, shoulder with And positioned at transition part, work department and the ending portion of sidewall section, the head of patterned tread section is using two intersection inclined-planes and and tire It is axially formed double angles；The transition part of sidewall section has transition face, and the work department of decorative pattern sidewall section has shovel mud face, and shovel mud face is set It sets and is a plane or an arc surface, the outside being mutually linked with shovel mud face is guide face；Slot is set on each pattern block, and slot is by pattern block in tire Face fringe region is divided into triangle stress area.

2. agricultural tyre as described in claim 1, it is characterised in that: the end face of pattern block head front end uses two phases Inclined-plane is handed over, and the intersection and tire axial of both ends of the surface and pattern block ground plane are respectively formed 10 °~30 ° of angle.

3. agricultural tyre as described in claim 1, it is characterised in that: the pattern block sidewall section is located on the outside of tread edge The transition part inside of sidewall area, pattern block sidewall section is connected with the shoulder of tread segments；On the outside of the transition part of sidewall section and sidewall The work department linking of section, the transition face of transition part are respectively set to cambered surface with the shovel mud face of work department and intersect.

4. agricultural tyre as claimed in claim 3, it is characterised in that: shovel mud face shovel mud corresponding with transition face intersection The tangent line and tire rotating direction in face are formed into mud angle, and entering mud angle is -10 °~20 °.

5. agricultural tyre as claimed in claim 4, it is characterised in that: transition face transition corresponding with shovel mud face intersection Shovel mud angle is formed between face and the respective tangent line for shoveling mud face, shovel mud angle is greater than into mud angle；And shovel mud angle is 60 °~75 °.

6. agricultural tyre as described in claim 1, it is characterised in that: what the ending portion of the pattern block was rolled with reverse tire Direction inclination, which extends, simultaneously to be terminated in sidewall area, the ending portion of pattern block along tire rotating direction front end ground connection edge with it is inverse To tire rotating direction shape it is at 45 °~90 ° of angle.

7. agricultural tyre as described in claim 1, it is characterised in that: the slot of the pattern block is crossed tread edge and is divided For the tread portion of slot and the side wall portion of slot, the volume of the side wall portion of slot is greater than the volume of the tread portion of slot.

8. agricultural tyre as claimed in claim 7, it is characterised in that: the transition face of the pattern block sidewall section connects with pattern block The intersection and tread edge on ground form an intersection point a, the friendship in shovel the mud face and guide face and decorative pattern ground plane of pattern block sidewall section Line is crossed to form an intersection point b, forms a virtual line segment between two intersection points；The center of the front end ground connection edge line of the side wall portion of slot The distance of position to virtual line segment is W1, and the center of the rear end ground connection edge line of the side wall portion of slot is to pattern block ground plane The distance of rear end ground connection edge line be W2, the rear end of the ground plane of intersection point a to pattern block tread segments is grounded the distance of edge line For W3, wherein W1=(0.3~0.5) W3, W2=(0.5~0.6) W3.

9. agricultural tyre as described in claim 1, it is characterised in that: the ground plane of the work department of pattern block sidewall section is Plough shape cambered surface with dog-ear, shovel mud face are cambered surface or plane, and the outside being mutually linked with shovel mud face is guide face, guide face For cambered surface, the intersection and tire rotating direction of the shovel mud face and ground plane form 30 °~60 ° of angle.

10. agricultural tyre as described in claim 1, it is characterised in that: the pattern block tread segments and pattern block sidewall section exist Radially it is arranged using drop, the ground plane and pattern block tread segments of the tread edges of pattern block tread segments to pattern block sidewall section Tire shoulder side wall intersection between radial height be pattern block tread segments bottom surface between the ground plane of pattern block tread segments Radial height 50%~65%.