Agricultural tire bead
By designing circumferential and radial vent lines and vent holes in the agricultural tire bead, the problem of bead scars has been solved, improving the tire's appearance quality and service life, while also enhancing the fit between the bead and the rim.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU XUGONG TIRES
- Filing Date
- 2025-05-08
- Publication Date
- 2026-06-16
Smart Images
Figure CN224360930U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tire technology, specifically to a tire bead for agricultural vehicles. Background Technology
[0002] The primary function of a tire bead is to securely fasten the tire to the rim. It overcomes stress generated by internal pressure and centrifugal force at high speeds, ensuring normal vehicle operation. Agricultural tire beads typically consist of carcass cords, steel wires, V-belt rubber, and rim covering. This area contains a high concentration of various materials, and during vulcanization, gases from the tire carcass, tool tires, water tires, or bladders, as well as gases between the tire carcass and the tire mold, are mostly expelled through the bead opening. With the increasing demand for high-horsepower agricultural machinery and the increasing load on these machines, the requirements for tire load capacity are also rising. Therefore, the number of carcass cord layers and cushioning layers in agricultural tires has increased accordingly, as has the strength of the tire bead. The number of steel wires has increased, and the bead opening width (W) has also increased. However, finished products are prone to bead punctures caused by gas accumulation, which often occur between the heel and toe.
[0003] Gas is easily generated during tire molding and is difficult to expel, which leads to bead marks on the tire bead area of the tire blank and the final vulcanized tire bead area. These marks often appear on the heel or between the heel and the toe, and have become a major defect among agricultural tire bead defects. Utility Model Content
[0004] This utility model aims to solve the above-mentioned technical problems by providing an agricultural tire bead.
[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:
[0006] An agricultural tire bead includes a crown and a sidewall, wherein the sidewall extends the crown radially inward, and multiple sets of buffer layers are installed inside the sidewall, with an inner liner or oil-based rubber installed inside the buffer layers.
[0007] The outer side of the tire sidewall has multiple sets of circumferential waterproof lines and circumferential vent lines, and multiple sets of interconnected first-segment vent lines are provided between the circumferential vent lines and the circumferential waterproof lines.
[0008] An exhaust port is opened on the first section of the exhaust line;
[0009] The inner liner has a second exhaust line on its sidewall that connects to the circumferential exhaust line.
[0010] Preferably, the second exhaust line and the first exhaust line are arranged alternately.
[0011] Preferably, the vent hole has a diameter of 1.8 or 2 mm.
[0012] Preferably, the buffer layer includes tire carcass ply, steel wire wrap, triangular rubber, and steel wire ring, with the two ends of the steel wire wrap wrapping inward around the triangular rubber and steel wire ring, and the inner liner or oil-skin rubber located on the side of the steel wire ring away from the tire sidewall.
[0013] Preferably, the circumferential exhaust lines are provided in two sets.
[0014] Preferably, the first exhaust line is connected to the outermost circumferential waterproof line.
[0015] With the above structure, this utility model has the following advantages:
[0016] This invention addresses the problem of bead scars and potential residual gas at the bead location by using a first exhaust line, a second exhaust line, and an exhaust hole. This improves the appearance quality while preventing premature damage to the bead during use caused by residual gas. The addition of exhaust lines also increases the fit between the tire bead and the rim, increasing friction and resulting in a tighter fit during use, reducing the risk of slippage when the tire and rim are subjected to excessive stress.
[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is the front view of this utility model;
[0020] Figure 2 This is a partial enlarged view of the present invention;
[0021] Figure 3 This is a side view of Embodiment 1 of this utility model;
[0022] Figure 4 This is a side view of Embodiment 2 of this utility model.
[0023] As shown in the figure: 1. Tire crown; 2. Tire sidewall; 3. Inner liner; 4. Oiled rubber; 5. Circumferential waterproof line; 6. Circumferential vent line; 7. First vent line; 8. Vent; 9. Tire carcass cord; 10. Steel wire wrapping; 11. Triangle rubber; 12. Steel wire bead; 13. Second vent line. Detailed Implementation
[0024] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0026] The present invention will now be described in further detail in conjunction with the full text.
[0027] Combined with appendix Figure 1 and Figure 2 An agricultural tire bead includes a tire crown 1 and a tire sidewall 2. The tire sidewall 2 extends the tire crown radially inward. Multiple sets of buffer layers are installed inside the tire sidewall 2. The multiple sets of buffer layers can be set in one or two sets. An inner liner layer 3 or an oil-based rubber layer 4 is installed inside the buffer layer.
[0028] Multiple sets of circumferential waterproof lines 5 and circumferential vent lines 6 are provided on the outer side of the tire sidewall 2. Multiple sets of first-section vent lines 7 are provided between the circumferential vent lines 6 and the circumferential waterproof lines 5.
[0029] An exhaust hole 8 is opened on the first exhaust line 7;
[0030] The inner liner 3 has a second exhaust line 13 on the sidewall 2 that connects to the circumferential exhaust line 6. The second exhaust line 13 extends from the circumferential exhaust line 6 to the inside of the rim opening. The second exhaust line 13 and the first exhaust line 7 are staggered. Through the exhaust hole 8, the second exhaust line 13 and the first exhaust line 7, the problem of bead marks and potential residual gas at the bead position are solved, improving the appearance quality while avoiding premature damage to the bead during use caused by residual gas.
[0031] The exhaust port 8 has a diameter of 1.8 or 2.
[0032] The buffer layer includes tire carcass ply 9, steel wire wrapping 10, triangular rubber 11, and steel wire ring 12. The two ends of the steel wire wrapping 10 inwardly wrap around the triangular rubber 11 and steel wire ring 12. The inner liner 3 or oil-based rubber 4 is located on the side of the steel wire ring 12 furthest from the tire sidewall 2. Two sets of circumferential vent lines 6 are provided. The first vent line 7 connects to the outermost circumferential waterproof line 5. Multiple combinations of the second vent line 13 and the first vent line 7 are added at the tire bead position in the tire mold to expel accumulated gas, solving the problem of bead gas spots. Increasing the number of vent lines also increases the friction between the tire bead and the rim, making their fit tighter.
[0033] Example 1:
[0034] like Figure 3 As shown, this embodiment is a tubeless structure with an inner liner 3, employing two sets of buffer layer structures. To prevent radial air lines from connecting and causing air leakage after tire and rim assembly, the radial air lines of the tire bead are divided into two sections. The first section, the vent line 7, extends from the upper edge of the circumferential waterproof line 5 to point a (1 / 2W bead width). The second section, the vent line 13, extends from point a to the inner edge of the steel rim, staggered from the first section, the vent line 7. The number of radial air lines in the first section, the vent line 7, and the second section, the vent line 13, are the same. The circumference can be designed to be divided into 15-50 equal parts depending on the specifications, or it can be designed according to the logarithmic multiple of the tread pattern (e.g., 15 pairs of tread patterns, 15×n), making the tire appearance more aesthetically pleasing. The circumferential spacing is designed to be 50-100mm. An additional R1mm circumferential air line is added at the heel position. A φ1.8mm vent hole is added at the intersection of the circumferential air line and the radial air line. An additional R1mm circumferential air line is added at point a of the first section, the vent line 7.
[0035] Example 2:
[0036] like Figure 4 As shown, this embodiment is an inner tube structure with an oil-coated rubber layer 4, using a set of buffer layer structures. The first section of the tire bead has an exhaust line 7, which extends from the tire toe to the upper end of the circumferential waterproof line 5. The circumference can be designed to be divided into 15-50 equal parts depending on the specifications, or it can be designed according to the logarithmic multiple of the tread pattern (such as 15 pairs of tread patterns, 15×n), making the tire appearance more beautiful. The circumferential spacing is designed to be 50-100mm. An additional R1mm circumferential air line is added at the tire heel position. A φ2.0mm exhaust hole is added at the intersection of the circumferential exhaust line 6 and the radial air line.
[0037] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.
Claims
1. An agricultural tire bead, comprising a tire crown (1) and a tire sidewall (2), characterized in that, The sidewall (2) extends the crown radially inward. Multiple sets of buffer layers are installed inside the sidewall (2). An inner liner (3) or an oil-based rubber (4) is installed inside the buffer layer. Multiple sets of circumferential waterproof lines (5) and circumferential vent lines (6) are provided on the outer side of the tire sidewall (2), and multiple sets of connected first-segment vent lines (7) are provided between the circumferential vent lines (6) and the circumferential waterproof lines (5). An exhaust hole (8) is opened on the first exhaust line (7).
2. The agricultural tire bead according to claim 1, characterized in that: The inner liner (3) has a second exhaust line (13) on its sidewall (2) that connects to the circumferential exhaust line (6).
3. The agricultural tire bead according to claim 2, characterized in that: The second exhaust line (13) and the first exhaust line (7) are staggered.
4. The agricultural tire bead according to claim 1, characterized in that: The exhaust port (8) has a diameter of 1.8 or 2 mm.
5. The agricultural tire bead according to claim 1, characterized in that: The buffer layer includes tire carcass cord (9), steel wire wrapping (10), triangular rubber (11) and steel wire ring (12). The two ends of the steel wire wrapping (10) are wrapped inwardly around the triangular rubber (11) and the steel wire ring (12). The inner liner (3) or oil-skin rubber (4) is located on the side of the steel wire ring (12) away from the tire sidewall (2).
6. The agricultural tire bead according to claim 1, characterized in that: The circumferential exhaust line (6) is set in two groups.
7. The agricultural tire bead according to claim 1, characterized in that: The first exhaust line (7) is connected to the outermost circumferential waterproof line (5).