CN112976953A

CN112976953A - Gradually-opened all-steel small-sized engineering tire groove bottom contour structure

Info

Publication number: CN112976953A
Application number: CN202110279511.1A
Authority: CN
Inventors: 周丽琰; 黄诗晟
Original assignee: Jiangsu General Science Technology Co Ltd
Current assignee: Jiangsu General Science Technology Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-06-18

Abstract

The invention belongs to the technical field of all-steel mechanical engineering tire manufacturing, and particularly relates to an involute all-steel small-sized engineering tire groove bottom profile structure. The half running surface of the involute all-steel small engineering tire comprises a 1# crown arc and a 2# crown arc, wherein the 1# crown arc is close to the crown, the 2# crown arc is close to the tire shoulder, the 1# crown arc and the 2# crown arc are in smooth transition, and the half running surface is provided with a pattern groove, and a groove bottom 1# arc, a groove bottom 2# arc, a groove bottom 3# arc and a groove bottom 4# arc which are in gradual smooth transition from the crown to the tire shoulder. The distance from the outer surface of the tire tread to the groove bottom is gradually increased from the crown to the tire shoulder, so that the effect that the thickness of the groove bottom rubber at the tire shoulder is thinner than that of the groove bottom rubber in the crown is achieved, the heat generation of the shoulder of the tire in the use process can be reduced, the possibility of shoulder space generation of the tire is reduced, and the service life of the tire is prolonged.

Description

Gradually-opened all-steel small-sized engineering tire groove bottom contour structure

Technical Field

The invention belongs to the technical field of all-steel mechanical engineering tire manufacturing, and particularly relates to an involute all-steel small-sized engineering tire groove bottom profile structure.

Background

The meridian rate of the tires for the engineering machinery in China is improved year by year, the use objects of the engineering tires are mainly concentrated on a loader and a scraper, the use objects of the engineering tires account for more than 2/3 of the use amount of the engineering machinery, and the proportion of the tires of the small loader to the total sales volume of the tires of the loader is improved year by year. The service environment of all-steel engineering machinery radial tires is mostly mines, construction sites, wharfs and the like, different service environments and applications have different requirements on the tires, but one of the basic requirements on the engineering tires is heat resistance and safety: the continuous working time of the engineering tire is long, so the thermal delamination of the tire crown and the tire shoulder is the primary damage form of the engineering tire, particularly the giant engineering tire, and the service life of the engineering tire is obviously shortened in open-pit metal mines in hot climates.

Disclosure of Invention

The invention aims to solve the problems and provides an involute all-steel small-sized engineering tire groove bottom contour structure. The design of the involute all-steel small-sized engineering tire groove bottom profile structure ensures that the thickness of the shoulder groove bottom rubber is thinner than that of the crown middle groove bottom rubber, and can reduce the heat generation of the tire shoulder part in the use process of the tire, thereby reducing the probability of occurrence of shoulder space delamination and prolonging the service life of the tire.

In order to solve the defects of the prior art, the invention adopts the following technical scheme:

the half running surface of the tire comprises a 1# crown arc and a 2# crown arc, wherein the 1# crown arc is close to the crown, the 2# crown arc is close to the tire shoulder, the 1# crown arc and the 2# crown arc are in smooth transition, and the half running surface is provided with a tread groove, and a groove bottom 1# arc, a groove bottom 2# arc, a groove bottom 3# arc and a groove bottom 4# arc which are gradually in smooth transition from the crown to the tire shoulder.

Further, the total height of the 1# crown arc and the 2# crown arc is 7-12 mm.

Further, the depth of the grooves is 28-32 mm.

Further, the radius of the 1# crown arc is larger than the radius of the 2# crown arc.

Further, the ratio of the width of the No. 1 crown arc to the width of the half running surface is 0.6-0.7.

Further, the radius of the No. 1 circular arc of the groove bottom is smaller than the difference between the radius of the No. 1 crown circular arc and the depth of the groove.

Furthermore, the radiuses of the groove bottom No. 1 circular arc, the groove bottom No. 2 circular arc, the groove bottom No. 3 circular arc and the groove bottom No. 4 circular arc are reduced in sequence.

Further, the ratio of the width of the No. 1 arc of the trench bottom to the width of the half running surface is 0.7-0.73.

Further, the ratio of the width of the No. 2 arc of the groove bottom to the width of the No. 1 arc of the groove bottom is 0.15-0.18.

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

the design of the involute all-steel small-sized engineering tire groove bottom profile structure ensures that the distance from the outer surface of the tire tread to the groove bottom is gradually increased from the crown to the tire shoulder, the effect that the thickness of the groove bottom rubber at the tire shoulder part is thinner than that of the groove bottom rubber in the crown is achieved, the heat generation of the shoulder part of the tire in the use process can be reduced, the probability of occurrence of shoulder space delamination is reduced, and the service life of the tire is prolonged.

Drawings

FIG. 1 is a schematic view of the outline structure of the bottom of the involute all-steel small-sized engineering tire.

Fig. 2 is a schematic view of the involute all-steel small-sized engineering tire groove bottom profile structure in embodiment 1 of the present invention.

Description of reference numerals: 1-half of the running surface; 2-1# coronal arc; 3-2# coronal arc; 4-pattern grooves; 5-groove bottom 1# arc; 6-groove bottom 2# arc; 7-groove bottom 3# arc; 8-groove bottom 4# arc.

Detailed Description

The invention is further illustrated by the following examples and figures.

Example 1

As shown in fig. 1: the utility model provides a little engineering tire ditch bottom profile structure of involute all steel, half running surface 1 of tire includes 1

# crown arc

2 and 2# crown arc 3, 1# crown arc 2 is close to in the crown, and 2# crown arc 3 is close to the tire shoulder, and the two smooth transition, be provided with tread groove 4 on half running surface 1 and by 1# circular arc 5, 2# circular arc 6, 3# circular arc 7 and 4# circular arc 8 at the bottom of the ditch of the gradual smooth transition of crown to the tire shoulder.

The width of the half driving surface 1 is set to be 160 mm, the radius of the 1# crown arc 2 is set to be 1300 mm, the width of the 1# crown arc 2 is set to be 98 mm, the radius of the 2# crown arc 3 is set to be 1200 mm, and the radius of the 2# crown arc 3 is smaller than that of the 1# crown arc 2.

The total height of 1

# crown arc

2 and 2# crown arc 3, namely the crown arc height 5 from the tire shoulder to the tire tread junction is set to be 8 mm, the depth of a tread groove 4 is set to be 30 mm, the radius of a groove bottom 1# arc 5 is set to be 1000 mm, the radius of the groove bottom 1# arc 5 is smaller than the difference value between the radius of the 1# crown arc 2 and the depth 4 of the tread groove, the effect is that the distance from the groove bottom to the tire tread is gradually reduced from the crown to the tire shoulder, the thickness of shoulder groove bottom rubber can be reduced under the condition that the flat and straight state of a belted layer is ensured, so that the heat generation of the shoulder of the tire in the using process can be reduced, the durability of the tire.

The width of the groove bottom # arc 1# 5 was set to 115 mm, the radius of the groove bottom # arc 2# 6 was set to 200 mm, the width of the groove bottom # arc 2# 6 was set to 17.5 mm, the radius of the groove bottom # arc 3# 7 was set to 50 mm, and the radius of the groove bottom # arc 4# 8 was set to 30 mm. The radius of the No. 4 arc 8 at the bottom of the groove is the smallest, so that the shoulder heat dissipation groove can be as large as possible, and the shoulder heat dissipation is facilitated.

The design of the involute all-steel small-sized engineering tire groove bottom profile structure ensures that the thickness of the shoulder groove bottom rubber is thinner than that of the crown middle groove bottom rubber, and can reduce the heat generation of the tire shoulder part in the use process of the tire, thereby reducing the probability of occurrence of shoulder space delamination and prolonging the service life of the tire.

The foregoing is illustrative of the preferred embodiments of the present invention only and is not to be construed as limiting the claims. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The utility model provides a profile structure at bottom of little engineering tire ditch of open all steel of gradually, its characterized in that, half driving face (1) of tire includes 1# crown arc (2) and 2# crown arc (3), 1# crown arc (2) are close to in the crown, and 2# crown arc (3) are close to the tire shoulder, and the two smooth transition, be provided with tread groove (4) and by 1# circular arc (5) at the bottom of the ditch, 2# circular arc (6), 3# circular arc (7) at the bottom of the ditch and 4# circular arc (8) at the bottom of the ditch of the gradual smooth transition of crown to the tire shoulder on half driving face (1).

2. The involute all-steel mini-engineering sipe bottom profile structure according to claim 1, wherein the total height of the 1# crown arc (2) and the 2# crown arc (3) is 7-12 mm.

3. The involute all-steel miniaturised engineering tire bottom profile according to claim 1, characterized in that the groove (4) has a depth of 28-32 mm.

4. The involute all-steel mini-engineering sipe floor profile of claim 1, wherein the radius of # 1 crown arc (2) is greater than the radius of # 2 crown arc (3).

5. The involute all-steel miniaturised engineering tire groove bottom profile structure according to claim 1, wherein the ratio of the width of the # 1 crown arc (2) to the width of the semi-running surface (1) is 0.6-0.7.

6. The involute all-steel mini-engineering tire groove bottom profile according to claim 1, wherein the radius of the groove bottom arc # 1 (5) is smaller than the difference between the radius of the arc # 1 (2) and the depth of the groove (4).

7. The involute all-steel small-sized engineering tire groove bottom contour structure according to claim 1, wherein the radii of the groove bottom 1# arc (5), the groove bottom 2# arc (6), the groove bottom 3# arc (7) and the groove bottom 4# arc (8) are sequentially reduced.

8. The involute all-steel small-sized engineering tire groove bottom contour structure according to claim 1, wherein the ratio of the width of the groove bottom 1# circular arc (5) to the width of the half-travel surface (1) is 0.7-0.73.

9. The involute all-steel small-sized engineering tire groove bottom contour structure according to claim 1, wherein the ratio of the width of the groove bottom 2# arc (6) to the width of the groove bottom 1# arc (5) is 0.15-0.18.