High stability tubeless tire for skid steer loader

Abstract

The utility model discloses a high stability tubeless tire for skid loader, including tire main body, the crown of tire main body is equipped with the pattern groove and the pattern piece, the inside of pattern groove is equipped with the reinforcing rib, the top of pattern piece is equipped with the crown counter -arc portion, the inside of tire main body is equipped with the lower tire side thickening portion, the shoulder of tire main body is equipped with the shoulder tangent portion, and this structure cooperates design through crown, pattern and tire side, and the pain point such as steering wear, uneven ground pressure and torsion damage of skidder tire is conquered, and it is especially suitable for mine, construction site and other harsh working conditions.

Description

Technical Field

[0001] This utility model relates to the field of rubber tire technology, specifically a high-stability tubeless tire for skid steer loaders. Background Technology

[0002] Skid steer loaders, due to their all-wheel drive and on-the-spot steering capabilities, are widely used in confined and harsh environments such as construction and mining. Current technologies mostly use solid tires or bias-ply industrial tires to improve wear resistance and puncture resistance, but the following drawbacks still exist:

[0003] 1. Severe wear during steering: When turning in place, the tire tread slides and rubs against the ground, accelerating wear in the middle of the tire crown.

[0004] 2. Uneven grounding pressure: After inflation, the crown protrudes and deforms, with the conventional crown arc height being greater than 10mm, resulting in a reduced grounding area and an increased slip rate.

[0005] 3. Insufficient torsional rigidity: The lower tire sidewall is not rigid enough, and the tire body is easily damaged by torsional force when turning in place.

[0006] To address this, a high-stability tubeless tire for skid steer loaders is proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a high-stability tubeless tire for skid steer loaders to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-stability tubeless tire for skid steer loaders, comprising a tire body, wherein the tire body has tread grooves and tread blocks at the crown, the tread grooves have reinforcing ribs inside, and the top of the tread blocks has a crown reverse arc portion; the tire body has a lower tire side thickening portion on the inner side of the lower tire; and the tire body has a shoulder tangent portion at the shoulder.

[0009] Preferably, the depth X2 of the patterned groove is 48-52 mm.

[0010] Preferably, the depth X4 of the crown reverse arc portion is 7-8 mm.

[0011] Preferably, the thickness X1 of the reinforcing rib is 15% of the depth of the pattern groove, and the width is 50% of the width X3 of the crown pattern block.

[0012] Preferably, the thickness of the thickened portion on the lower tire sidewall is 20%.

[0013] Preferably, the ratio of the length L of the shoulder tangent to the tread groove depth X2 is 1.05≤L / X2≤1.15.

[0014] Preferably, the angle α between the pattern groove and the center line of the crown is ≥64°.

[0015] Preferably, the angle α between the tread groove and the crown centerline and the crown cord angle β = 60 ± 2° form an angle difference of > 3°.

[0016] Compared with the prior art, the beneficial effects of this utility model are: through the coordinated design of the crown, tread and sidewall, this structure overcomes the pain points of skid steer tires such as steering wear, uneven ground pressure and torque damage, and is particularly suitable for harsh working conditions such as mines and construction sites. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the unfolded tread pattern of this utility model;

[0019] Figure 3 This utility model Figure 2 Schematic diagrams of structural cross-sections at various points within the structure.

[0020] In the diagram: 1. Tire body; 2. Tread grooves; 3. Crown reverse arc section; 4. Reinforcing rib; 5. Thickened section of lower tire sidewall; 6. Shoulder tangent section; 7. Tread block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a high-stability tubeless tire for skid steer loaders, comprising a tire body 1, with tread grooves 2 and tread blocks 7 at the crown of the tire body 1, and a tread saturation of 55±2%. The depth X2 of the tread grooves 2 is 48-52mm, and the angle α between the tread grooves 2 and the center line of the crown is ≥64°, nearly laterally distributed, enhancing traction and passability. The angle α and the crown cord angle β=60±2° form an angle difference of >3°, suppressing inflation stress.

[0023] The interior of the pattern groove 2 is provided with reinforcing ribs 4. The thickness of the reinforcing ribs 4 is 15% of the depth of the pattern groove 2, and the width is 50% of the width of the crown pattern block 7 x 3. The root of the pattern is strongly supported, reducing root cracks.

[0024] The top of the patterned block 7 is provided with a crown anti-arc part 3. The depth of the crown anti-arc part 3 X4 is 7-8mm. With the 7-8mm anti-arc design, the crown curvature after inflation is reduced from (crown diameter - shoulder diameter) / 2 to 6±0.5mm, which reduces the outward deformation of the inflated crown and increases the ground contact area by 15-20%, effectively dispersing the steering sliding friction stress.

[0025] The inner side of the lower tire body 1 is provided with a lower tire side thickening part 5, and the thickness of the lower tire side thickening part 5 is 20%, which improves the torsional stiffness and reduces the risk of damage from torque when turning in place.

[0026] The tire body 1 has a shoulder tangent 6 at the shoulder. The ratio of the length L of the shoulder tangent 6 to the depth X2 of the tread groove 2 is 1.05≤L / X2≤1.15, which enhances the shoulder support rigidity and reduces shoulder collapse during steering.

[0027] Taking the 12-16.5-12PR NHS tire as an example: Crown curvature depth 8mm. Crown angle 60.23°, crown center tread angle 64°, tread saturation 55%, tread depth 51mm, reinforcing rib thickness 8mm. Shoulder tangent length 56mm, shoulder tangent length / tread depth = 1.1. Cross-section center axis thickness 12mm, bead width 30mm, lower sidewall with a smooth transition from center axis to bead.

[0028] The experimental results are shown in the table below:

[0029] hierarchy 12 Grounding width (mm) 257 Inspect wheel rims 9.75 Grounding area (mm) 35013 Ambient temperature (C) 22.8 Average grounding pressure (mm) 801.9 Test air pressure (kPa) 550 Grounding coefficient 1.05 Rated load (kg) 2865 Hardness coefficient 1.78 Inflatable outer diameter (mm) 837 Static radius under load (mm) 377.2 Inflatable cross-sectional width (mm) 311 Cross-sectional height under load (mm) 167.7 Inflatable shoulder diameter (mm) 824 Subsidence rate (%) 20.1％ Section height of pneumatic tire (mm) 210 Subsidence (mm) 39.1

[0030] Remark:

[0031] 1. Tire section height = (outer diameter of inflatable tire - nominal diameter of rim) / 2.

[0032] 2. Tire section height under load = Tire static radius under load - Nominal rim diameter / 2.

[0033] 3. Sinking amount = tire section height - tire section height under load.

[0034] 4. Sinking rate = Sinking amount / Height of inflated tire section × 100%.

[0035] 5. Grounding coefficient = Grounding length / Grounding width.

[0036] 6. Average grounding pressure = test load / grounding area under load.

[0037] 7. Hardness coefficient = test load / (grounding area under load × test air pressure).

[0038] As shown in the table above: under standard tire pressure, the outer diameter is 837mm, the shoulder diameter is 824mm, and the crown height is 6.5mm. The crown is flat. Under a standard load of 2865kg, the contact patch length is 271mm, the contact patch width is 257mm, the contact patch area is 35013mm², the contact patch coefficient is 1.05, the contact patch width is close to the contact patch length, the contact patch area increases by more than 15%, and the contact patch pressure is evenly distributed. Increasing the lower sidewall thickness results in a tire sinking rate of 20.1%. With the increase in contact patch area, the sinking rate changes only slightly (compared to 25-30% for conventional tires), and the torsional stiffness is significantly improved.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-stability tubeless tire for skid steer loaders, comprising a tire body (1), characterized in that: The tire body (1) has a tread groove (2) and a tread block (7) at the crown. The tread groove (2) has a reinforcing rib (4) inside, and the top of the tread block (7) has a crown reverse arc part (3). The tire body (1) has a lower tire side thickening part (5) on the inner side of the lower tire; The tire body (1) has a shoulder tangent (6) at the shoulder.

2. The high-stability tubeless tire for skid steer loaders according to claim 1, characterized in that: The depth X2 of the patterned groove (2) is 48-52 mm.

3. The high-stability tubeless tire for skid steer loaders according to claim 1, characterized in that: The depth X4 of the crown reverse arc portion (3) is 7-8 mm.

4. A high-stability tubeless tire for skid steer loaders according to claim 1, characterized in that: The thickness X1 of the reinforcing rib (4) is 15% of the depth of the patterned groove (2), and the width is 50% of the width X3 of the crown patterned block (7).

5. A high-stability tubeless tire for skid steer loaders according to claim 1, characterized in that: The thickness of the thickened portion (5) on the lower tire sidewall is 20%.

6. A high-stability tubeless tire for skid steer loaders according to claim 1, characterized in that: The ratio of the length L of the shoulder tangent (6) to the depth X2 of the tread groove (2) is 1.05≤L / X2≤1.

15.

7. A high-stability tubeless tire for skid steer loaders according to claim 1, characterized in that: The angle α between the patterned groove (2) and the center line of the crown is ≥64°.

8. A high-stability tubeless tire for skid steer loaders according to claim 7, characterized in that: The angle α between the tread groove (2) and the center line of the crown forms an angle difference of >3° with the angle β of the crown cord, which is 60±2°.

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