CN104999862B - Non-pneumatic safety tire - Google Patents

Abstract

The invention provides a non-pneumatic safety tire, which comprises a tread, an outer ring, a support body and an inner ring from the outside to the inside in order. The tread is bonded or vulcanized on the outer ring, the support body is arranged between the inner ring and the outer ring along the radial direction and circumferential direction from the outer ring, multiple groups of damping units and support ribs, each group of damping unit consists of two sets of damping structures, and two sets of damping structures are circumferentially disposed with the radial direction as the symmetric axis. The non-pneumatic tire provided by the invention has good bearing capacity, and by means of wheel disk thickening and multiple damping hole diameter change, the bearing capacity of the tire can be enhanced. The non-pneumatic safety tire not only has the carrying capacity and static rigidity characteristics of pneumatic tyres, but also has rationally distributed ground pressure, the abrasion resistance and trip distance of the tire are increased, especially the reasonable distribution of multiple damping holes and support ribs in the radial and circumferential direction can enhance the carrying capacity of the tire and also can improve the static rigidity of the tire.

Description

Inflatable Safety Tires

technical field

The invention relates to a non-inflation safety tire, which is suitable for tires on various vehicles, especially suitable for truck tires, and can improve the bearing capacity and safety of the tires.

Background technique

As an important part of modern automobiles, tires have undergone decades of rapid development and have formed multiple series such as pneumatic tires, solid tires, and non-inflatable tires. Pneumatic tires that are widely used at present have disadvantages such as difficult maintenance, air leakage, and tire blowout; although solid tires do not have the problem of air leakage, they are heavy in weight and poor in elasticity, which is not conducive to the improvement of comfort. Due to the advantages of no inflation, puncture resistance, easy maintenance, long life, and easy refurbishment and reuse, non-pneumatic tires are suitable for use on vehicles with harsh working environments. In recent years, more and more attention has been paid to the automotive industry.

Patent 20151005569.5 discloses a non-inflatable safety tire, which consists of tread, outer ring, support body and inner ring from outside to inside. The inner ring is in contact with the rim, and the support body is a ring structure. The first shock-absorbing holes evenly distributed in the circumferential direction, and the second shock-absorbing holes corresponding to the first shock-absorbing holes are arranged on the outer circumference of the first shock-absorbing holes. The sum of the areas of the shock holes is smaller than the sum of the areas of the second shock holes. The invention uses multiple and multi-layer damping holes arranged radially and circumferentially to form a supporting body, which can buffer the vibration and impact from the ground when the tire is running, bear the load of the vehicle, and reduce the buckling of the tire caused by excessive compression. Deformation improves the bearing capacity and service life of the tire.

But this prior art has following shortcoming and problem:

1) The spokes are used as supports between the shock-absorbing holes, the strength is relatively low, and it is not conducive to the improvement of the heat dissipation performance and the reduction of the weight of the tire.

2) There are relatively sharp angles at both ends of the bow-shaped damping hole, which easily causes stress concentration and is not conducive to the improvement of tire life.

3) When the inner ring is provided with a single anti-slip protrusion in the circumferential or axial direction, it can only prevent slipping in one direction; when the circumferential and axial directions are installed at the same time, the process is complicated, and the two sets of anti-slip protrusions interact with each other, affecting the anti-slip effect.

Contents of the invention

In order to solve the above technical problems, the present invention proposes a non-pneumatic tire with good load-bearing capacity, which can improve the load-bearing capacity of the tire by thickening the web and changing the diameter of various shock-absorbing holes. Rigidity characteristics, and the ground pressure distribution is reasonable, which improves the wear resistance and mileage of the tire, especially the reasonable distribution of a variety of shock-absorbing holes and support ribs in the radial and circumferential directions, which can improve the bearing capacity of the tire and improve the performance of the tire. static stiffness, thus expanding the application prospect of this structure on various vehicle tires.

Technical scheme of the present invention is:

A non-pneumatic safety tire, which consists of a tread 10, an outer ring 20, a support body 30 and an inner ring 40 from outside to inside. The tread 10 is bonded or vulcanized on the outer ring 20, and the support body is Starting from the ring 20, it is arranged radially and circumferentially between the outer ring 20 and the inner ring 40. Multiple groups of damping units and support ribs 27 are distributed on the support body 30 along the circumferential direction, and each group of damping units consists of It consists of two groups of shock absorbing structures, and the two groups of shock absorbing structures are arranged circumferentially with the radial direction as the axis of symmetry.

Preferably, the shock absorbing structure is composed of a first shock absorbing hole 21 , a second shock absorbing hole 22 , a third shock absorbing hole 23 , a fourth shock absorbing hole 24 and a fifth shock absorbing hole 25 .

The first damping hole 21 is arranged along the inner circumference of the support body 30, its cross section is a right-angled trapezoid, its right-angled waist is distributed along the radial direction, and the upper bottom is close to the inner circumference;

The second shock-absorbing hole 22 is arranged along the inner circumference of the support body 30, and its cross-section is a right-angled trapezoid, and its right-angled waist is distributed along the radial direction. oblique waist parallel to each other;

The third damping hole 23 is arranged along the outer circumference of the support body 30, and its cross section is an isosceles triangle, with the bottom facing the inner circumference and perpendicular to the radial direction;

The fourth shock-absorbing hole 24 is opposite to the third shock-absorbing hole 23, and its cross section is an isosceles triangle with the bottom facing the outer circumference and perpendicular to the radial direction. The fourth shock-absorbing hole 24 and the third shock-absorbing hole 23 The symmetry axes of are on the same radial line;

The fifth shock absorbing hole 25 includes two parts, the fifth left shock absorbing hole 25-1 and the fifth right shock absorbing hole 25-2. The side and the second damping hole 22 are located on the same straight line, the two sides adjacent to the longest side are perpendicular to it, and the remaining two sides are respectively parallel to the sides close to the third damping hole 23 and the fourth damping hole 24. The fifth right damping hole 25-2 is symmetrical to the center line of the third damping hole 23 and the fourth damping hole 24 and the fifth left damping hole 25-1, and the third damping hole 23 and the fourth damping hole 24 Together with the fifth damping hole 25, it forms an "X"-shaped structure.

The supporting ribs 27 include the first supporting ribs 27-1 arranged between the first shock absorbing hole 21 and the second shock absorbing hole 22; The "X"-shaped second support ribs 27-2 between the shock holes 25; the third support ribs 27-3 arranged between the shock-absorbing structures.

The shock-absorbing unit composed of shock-absorbing holes can effectively play the role of buffering, and can also reduce the weight of the tire, and is conducive to quickly dissipating the heat generated by the thicker web due to repeated deformation during the running of the tire, improving the tire service life. The centerlines of the third shock-absorbing hole 23 and the fourth shock-absorbing hole 24 are on the same straight line and distributed along the radial direction of the tire, which improves the shock absorption effect and impact resistance in the radial direction of the tire, and enhances the comfort and safety of the tire sex. In addition, by adjusting the size of the shock-absorbing hole, the load-carrying capacity of the tire can meet the requirements of various vehicles from light load to heavy load.

Arranging support ribs 27 between the shock-absorbing holes and between the shock-absorbing structures can avoid buckling and deformation of the tire caused by local excessive force, thereby improving the bearing capacity of the tire and prolonging the service life of the tire.

Preferably, each corner of the damping hole is rounded.

By making transitions at the corners of the damping holes with rounded corners, the stress concentration phenomenon can be effectively avoided, and the fatigue life of the non-pneumatic tire can be improved.

Preferably, the non-inflatable safety tire further includes a rim 50, a set of trapezoidal protrusions 51 are arranged on both sides of the periphery of the rim 50, and the upper bottoms of the trapezoidal protrusions 51 face outward.

Preferably, a set of trapezoidal grooves 41 are provided on both sides of the inner ring 40 of the non-inflatable safety tire.

By setting the trapezoidal anti-skid groove 41 on the inner ring 40, the tire can be prevented from slipping in the circumferential and axial directions on the rim, and the driving safety and reliability of the tire can be improved.

For a truck tire with a larger tire diameter, in order to prevent the size of the shock absorbing hole from being too large due to the large diameter of the support body 30 , it is preferable to arrange a multi-layer shock absorption unit structure in the radial direction of the support body 30 .

By arranging multi-layer damping units on the support body 30, the diameter of the non-pneumatic tire can be increased according to the needs of use and load capacity without changing the structure of the damping unit, ensuring that the non-pneumatic tires with different load capacities and diameters Both have good cushioning and shock absorption performance, improving versatility.

In the present invention, the supporting body composed of a plurality of supporting ribs, radial plates and damping holes arranged radially and circumferentially can buffer the vibration and impact from the ground when the tire is running, and bear the load of the vehicle to prevent the tire from being over-compressed. The resulting buckling deformation improves the load-bearing capacity and service life of the tire, making it suitable for tires on various vehicles. The new structure of shock-absorbing holes composed of triangles and trapezoids is used to replace the original semi-circular holes, so that the weight of tires with the same specification can be significantly reduced. Lowered, improved shock absorption and heat dissipation. In addition, at the contact part between the tire and the rim, a trapezoidal concave-convex structure is adopted, which further improves the safety and reliability of the large-size non-inflatable safety tire during use, and prevents the tire from slipping in the circumferential direction and falling off in the axial direction on the rim .

Description of drawings

Fig. 1 is the front view of the air-free safety tire of the present invention;

Fig. 2 is a three-dimensional view of the air-free safety tire of the present invention;

Fig. 3 is the schematic diagram of support structure unit;

Fig. 4 is the three-dimensional figure of rim;

Fig. 5 is the assembly drawing of tire and rim;

Fig. 6 is the comparison of the static stiffness curves of an air-free safety tire and a pneumatic tire under load;

Fig. 7 is a front view of a non-pneumatic tire provided with a multi-layer damping hole structure.

detailed description

The technical solutions of the present invention will be described in detail below through specific examples, but the scope of the present invention is not limited by these examples.

Example 1

As shown in Figures 1 to 3, this embodiment provides a non-inflatable safety tire, which consists of a tread 10, an outer ring 20, a support body 30 and an inner ring 40 from outside to inside, and the tread 10 is bonded or Vulcanized on the outer ring 20, the support body starts from the outer ring 20, and is arranged between the outer ring 20 and the inner ring 40 in the radial and circumferential directions, and a plurality of groups of reducing rings are distributed on the support body 30 in the circumferential direction As for the shock unit and the support rib 27, each group of shock absorbers is composed of two groups of shock absorbing structures, and the two groups of shock absorbing structures are circumferentially arranged with the radial direction as the axis of symmetry.

The shock absorbing structure is made up of a first shock absorbing hole 21, a second shock absorbing hole 22, a third shock absorbing hole 23, a fourth shock absorbing hole 24 and a fifth shock absorbing hole 25; the first shock absorbing hole 21 Arranged along the inner circumference of the support body 30, its cross section is a right-angled trapezoid, its right-angled waist is distributed radially, and the upper bottom is close to the inner circumference; the second damping hole 22 is arranged along the inner circumference of the support body 30 , its cross-section is a right-angled trapezoid, its right-angled waist is distributed along the radial direction, the lower bottom is close to the inner circumference, and the oblique waist is parallel to the oblique waist of the first shock-absorbing hole 21; Circumferentially arranged, its cross-section is an isosceles triangle, the bottom edge faces the inner circumference and is perpendicular to the radial direction; the fourth shock-absorbing hole 24 is arranged opposite to the third shock-absorbing hole 23, and its cross-section is an isosceles triangle, The bottom edge faces the outer circumference and is perpendicular to the radial direction, and the symmetry axes of the fourth shock-absorbing hole 24 and the third shock-absorbing hole 23 are on the same radial line; the fifth shock-absorbing hole 25 includes the fifth left shock-absorbing hole 25- 1 and the 5th right damping hole 25-2 two parts, the 5th left damping hole 25-1 cross-section is pentagonal, and its longest side and the 22 right-angle waists of the second damping hole are positioned on the same straight line, and the most The two sides adjacent to the long side are perpendicular to it, and the remaining two sides are respectively parallel to the sides close to the third shock absorbing hole 23 and the fourth shock absorbing hole 24. The fifth right shock absorbing hole 25-2 is opposite to the third shock absorbing hole 23 and the fourth shock absorbing hole 24. The center line of the fourth shock absorbing hole 24 is symmetrical to the fifth left shock absorbing hole 25-1, and the third shock absorbing hole 23, the fourth shock absorbing hole 24 and the fifth shock absorbing hole 25 together form an "X" structure; The supporting ribs 27 include the first supporting ribs 27-1 arranged between the first shock-absorbing hole and the second shock-absorbing hole; The "X"-shaped second support ribs 27-2 between them; the third support ribs 27-3 arranged between the shock-absorbing structures.

The corners of the damping holes are rounded transitions.

Example 2

This embodiment provides a non-inflatable safety tire, as shown in Figure 1-3, from the outside to the inside are the tread 10, the outer ring 20, the support body 30 and the inner ring 40, the tread 10 is bonded or Vulcanized on the outer ring 20, the support body starts from the outer ring 20, and is arranged between the outer ring 20 and the inner ring 40 in the radial and circumferential directions, and a plurality of groups of reducing rings are distributed on the support body 30 in the circumferential direction As for the shock unit and the support rib 27, each group of shock absorbers is composed of two groups of shock absorbing structures, and the two groups of shock absorbing structures are circumferentially arranged with the radial direction as the axis of symmetry.

The shock absorbing structure is made up of a first shock absorbing hole 21, a second shock absorbing hole 22, a third shock absorbing hole 23, a fourth shock absorbing hole 24 and a fifth shock absorbing hole 25; the first shock absorbing hole 21 Arranged along the inner circumference of the support body 30, its cross section is a right-angled trapezoid, its right-angled waist is distributed radially, and the upper bottom is close to the inner circumference; the second damping hole 22 is arranged along the inner circumference of the support body 30 , its cross-section is a right-angled trapezoid, its right-angled waist is distributed along the radial direction, the lower bottom is close to the inner circumference, and the oblique waist is parallel to the oblique waist of the first shock-absorbing hole 21; Circumferentially arranged, its cross-section is an isosceles triangle, the bottom edge faces the inner circumference and is perpendicular to the radial direction; the fourth shock-absorbing hole 24 is arranged opposite to the third shock-absorbing hole 23, and its cross-section is an isosceles triangle, The bottom edge faces the outer circumference and is perpendicular to the radial direction, and the symmetry axes of the fourth damping hole 24 and the third damping hole 23 are located on the same radial line. The fifth shock absorbing hole 25 includes two parts, the fifth left shock absorbing hole 25-1 and the fifth right shock absorbing hole 25-2. The side and the second damping hole 22 are located on the same straight line, the two sides adjacent to the longest side are perpendicular to it, and the remaining two sides are respectively parallel to the sides close to the third damping hole 23 and the fourth damping hole 24. The fifth right damping hole 25-2 is symmetrical to the center line of the third damping hole 23 and the fourth damping hole 24 and the fifth left damping hole 25-1, and the third damping hole 23 and the fourth damping hole 24 Together with the fifth shock-absorbing hole 25, an "X"-shaped structure is formed, and the corners of the above-mentioned shock-absorbing holes are rounded transitions; A support rib 27-1; an "X"-shaped second support rib 27-2 arranged between the third shock-absorbing hole 23, the fourth shock-absorbing hole 24 and the fifth shock-absorbing hole 25; arranged between the shock-absorbing structures The third support rib 27-3.

As shown in Figures 4 and 5, the non-inflatable safety tire further includes a rim 50, a set of trapezoidal protrusions 51 are arranged on both sides of the periphery of the rim 50, and the upper bottom of the trapezoidal protrusions 51 faces outward. A set of trapezoidal grooves 41 are provided on both sides of the inner ring 40 of the non-inflatable safety tire.

Example 3

As shown in Figures 1-3, this embodiment provides a non-inflatable safety tire, which consists of a tread 10, an outer ring 20, a support body 30 and an inner ring 40 from outside to inside, and the tread 10 is bonded or Vulcanized on the outer ring 20, the support body starts from the outer ring 20, and is arranged between the outer ring 20 and the inner ring 40 in the radial and circumferential directions, and a plurality of groups of reducing rings are distributed on the support body 30 in the circumferential direction As for the shock unit and the support rib 27, each group of shock absorbers is composed of two groups of shock absorbing structures, and the two groups of shock absorbing structures are circumferentially arranged with the radial direction as the axis of symmetry.

The shock absorbing structure is made up of a first shock absorbing hole 21, a second shock absorbing hole 22, a third shock absorbing hole 23, a fourth shock absorbing hole 24 and a fifth shock absorbing hole 25; the first shock absorbing hole 21 Arranged along the inner circumference of the support body 30, its cross section is a right-angled trapezoid, its right-angled waist is distributed radially, and the upper bottom is close to the inner circumference; the second damping hole 22 is arranged along the inner circumference of the support body 30 , its cross-section is a right-angled trapezoid, its right-angled waist is distributed along the radial direction, the lower bottom is close to the inner circumference, and the oblique waist is parallel to the oblique waist of the first shock-absorbing hole 21; Circumferentially arranged, its cross-section is an isosceles triangle, the bottom edge faces the inner circumference and is perpendicular to the radial direction; the fourth shock-absorbing hole 24 is arranged opposite to the third shock-absorbing hole 23, and its cross-section is an isosceles triangle, The bottom edge faces the outer circumference and is perpendicular to the radial direction, and the symmetry axes of the fourth shock-absorbing hole 24 and the third shock-absorbing hole 23 are on the same radial line; the fifth shock-absorbing hole 25 includes the fifth left shock-absorbing hole 25- 1 and the 5th right damping hole 25-2 two parts, the 5th left damping hole 25-1 cross-section is pentagonal, and its longest side and the 22 right-angle waists of the second damping hole are positioned on the same straight line, and the most The two sides adjacent to the long side are perpendicular to it, and the remaining two sides are respectively parallel to the sides close to the third shock absorbing hole 23 and the fourth shock absorbing hole 24. The fifth right shock absorbing hole 25-2 is opposite to the third shock absorbing hole 23 and the fourth shock absorbing hole 24. The center line of the fourth shock absorbing hole 24 is symmetrical to the fifth left shock absorbing hole 25-1, and the third shock absorbing hole 23, the fourth shock absorbing hole 24 and the fifth shock absorbing hole 25 together form an "X" structure; The supporting ribs 27 include the first supporting ribs 27-1 arranged between the first shock-absorbing hole and the second shock-absorbing hole; The "X"-shaped second support ribs 27-2 between them; the third support ribs 27-3 arranged between the shock-absorbing structures.

The corners of the shock-absorbing holes are rounded transitions. As shown in FIG. 7 , a multi-layer shock-absorbing unit structure is arranged in the radial direction of the support body 30 .

The finite element analysis results of the non-pneumatic tire and pneumatic tire of the present invention are shown in the following table, and the static stiffness curve is shown in Figure 7. The structure of the non-pneumatic safety tire of the present invention is a reasonable structure calculated and optimized by finite element technology. As can be seen from the following table and Fig. 7, the non-inflatable safety tire of the present invention has the characteristics of bearing capacity and static stiffness of a pneumatic tire, the distribution of ground pressure is reasonable, and the wear resistance and mileage of the tire are improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. a kind of non-inflatable safety tyre, is followed successively by tyre surface (10), outer shroud (20), supporter (30) and internal ring from outside to inside (40), described tyre surface (10) bonding or vulcanize on outer shroud (20), described supporter from the beginning of outer shroud (20), radially and circumference It is arranged between outer shroud (20) and internal ring (40), described supporter (30) upper circumferentially distributed multigroup vibration absorption unit and brace rod (27), every group of vibration absorption unit is made up of two groups of shock-damping structures, and two groups of shock-damping structures are circumferentially disposed for axis of symmetry with radial direction；Described subtract Shake structure is by the first shock relieve vent (21), the second shock relieve vent (22), the 3rd shock relieve vent (23), the 4th shock relieve vent (24) and the 5th damping Hole (25) is constituted；Described 5th shock relieve vent (25) includes the 5th left shock relieve vent and the 5th right shock relieve vent two parts, the 5th right damping Hole is symmetrical with respect to the 3rd shock relieve vent (23) and the 4th shock relieve vent (24) centrage and the 5th left shock relieve vent, the 3rd shock relieve vent (23), the 4th shock relieve vent (24) and the 5th shock relieve vent (25) collectively constitute " x " type structure.

2. non-inflatable safety tyre according to claim 1 it is characterised in that:

Described first shock relieve vent (21) is circumferentially disposed along the inner periphery of supporter (30), and its cross section is right-angled trapezium, its right angle Waist is radially distributed, and upper bottom is near inner periphery；

Described second shock relieve vent (22) is circumferentially disposed along the inner periphery of supporter (30), and its cross section is right-angled trapezium, its right angle Waist is radially distributed, goes to the bottom near inner periphery, oblique waist is parallel relative with the oblique waist of the first shock relieve vent (21)；

Described 3rd shock relieve vent (23) is circumferentially disposed along supporter (30) excircle, and its cross section is isosceles triangle, base court Inner periphery and with radially vertical；

Described 4th shock relieve vent (24) is oppositely arranged with the 3rd shock relieve vent (23), and its cross section is isosceles triangle, and base is outwardly Circumference and with radially vertical, the axis of symmetry of the 4th shock relieve vent (24) and the 3rd shock relieve vent (23) is on same radial line；

Described 5th left shock relieve vent (25-1) cross section is pentagon, and its longest edge and the second shock relieve vent (22) right angle waist are positioned at same On one straight line, the both sides adjacent with longest edge are perpendicular, remaining both sides respectively with the 3rd shock relieve vent (23) and the 4th shock relieve vent (24) close side is parallel relatively.

3. non-inflatable safety tyre according to claim 2 it is characterised in that: described brace rod (27) includes being arranged at the The first brace rod (27-1) between one shock relieve vent (21) and the second shock relieve vent (22)；It is arranged at the 3rd shock relieve vent (23), the 4th subtract " x " type the second brace rod (27-2) between shake hole (24) and the 5th shock relieve vent (25)；It is arranged at the 3rd between shock-damping structure Support muscle (27-3).

4. non-inflatable safety tyre according to claim 3 it is characterised in that: each corner of described shock relieve vent be fillet mistake Cross.

5. non-inflatable safety tyre according to claim 4 it is characterised in that: described non-inflatable safety tyre also include take turns Rim (50), one group of trapezoidal projection (51) of each setting in described wheel rim (50) periphery both sides, the upper bottom direction of described trapezoidal projection (51) Outside.

6. non-inflatable safety tyre according to claim 5 it is characterised in that: the internal ring of described non-inflatable safety tyre (40) both sides respectively arrange one group of trapezoidal groove (41), and the upper bottom of trapezoidal groove (41) is towards the setting on outside, with wheel rim (50) Trapezoidal projection (51) cooperation.

7. according to the arbitrary described non-inflatable safety tyre of claim 1-6 it is characterised in that: the radial direction of described supporter (30) Setting multilamellar vibration absorption unit structure.