Inflation-free vacuum tire

Abstract

An inflation-free vacuum tire, comprising a tread (1) and a carcass ply (2), wherein the tread is arranged above the carcass ply and located at a tire crown, and a surface of the tread is provided with pattern grooves (11); the tire further comprises a puncture-proof airtight layer (3), which is fixedly arranged between the tread and the carcass ply or is fixedly arranged below the carcass ply, the puncture-proof airtight layer comprising one or more layers of canvas (31), and canvas warps and wefts are formed by combining a plurality of filaments, and the canvas forms the puncture-proof airtight layer by means of rubber impregnating and coating; and the puncture-proof airtight layer covers at least from a tire bead to a tire shoulder, and a lower end of the puncture-proof airtight layer extends to the tire bead and forms a back-wrapping structure. In the vacuum tire, the puncture resistance and air tightness of the tire are improved by means of the puncture-proof airtight layer composed of rubber-impregnated and rubber-coated canvas.

Description

A non-inflation vacuum tire Technical Field

[0001] The present invention relates to the technical field of tires, and in particular to an air-free vacuum tire. Background Art

[0002] As people's living standards improve, the requirements for product quality and load-bearing capacity are getting higher and higher.

[0003] Currently, vacuum tires are being used in more and more fields, and their application effects are also good, making them high-end tires. However, airtightness and puncture resistance are still issues that vacuum tires need to face.

[0004] Regarding vacuum tire technology, for example, a vacuum tire disclosed in a Chinese utility model patent with publication number CN203623290U and announcement date 2014.06.04, the fiber puncture-proof layer mentioned in the solution is only described in general terms and described from the perspective of external installation structure, but the specific structure of the vacuum tire is not explained, nor is there any disclosure of how to carry out airtightness-related design. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an airless vacuum tire, which improves the puncture resistance and air tightness of the tire by a puncture-proof airtight layer composed of rubber-impregnated and rubber-coated canvas.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A non-inflatable vacuum tire, comprising a tread layer and a carcass ply, wherein the tread layer is arranged above the carcass ply and located at the tire crown, and a surface of the tread layer is provided with pattern grooves;

[0008] The tire also includes a puncture-proof airtight layer, which is fixedly arranged between the tread layer and the carcass ply or fixedly arranged below the carcass ply. The puncture-proof airtight layer includes one or more layers of canvas, the warp and weft of the canvas being composed of 5 to 30 filaments, and the canvas is formed into the puncture-proof airtight layer by means of dipping and coating with rubber.

[0009] The puncture-proof airtight layer at least covers the area from the tread opening to the tread shoulder position, and the lower end of the puncture-proof airtight layer extends to the tread opening position to form an inverted structure.

[0010] Preferably, the warp is a flat fiber bundle and the weft is a quasi-circular fiber bundle; or, the warp is a quasi-circular fiber bundle and the weft is a flat fiber bundle; or, both the warp and the weft are flat fiber bundles; or, both the warp and the weft are quasi-circular fiber bundles;

[0011] The flat fiber bundle is a fiber bundle composed of 5-30 filaments laid flat; the quasi-circular fiber bundle is a fiber bundle composed of 5-30 filaments with a quasi-circular cross-section.

[0012] Preferably, the width of the flat fiber bundle is 0.5-3.5 mm, preferably 1.5-3.0 mm; the width of the quasi-round fiber bundle is 0.2-1.0 mm, preferably 0.5-0.8 mm.

[0013] Preferably, the width of the visible light slit of the canvas is between 0-2 mm, preferably 0.2-1.5 mm.

[0014] Preferably, the quasi-round fiber bundle is twisted.

[0015] Preferably, two groups of puncture-proof airtight layers are provided and symmetrically arranged between the tread layer and the carcass cord layer; the upper end of one group of puncture-proof airtight layers extends to the tire shoulder or below the tread layer, and the lower end extends to the sub-mouth position, and bypasses the sub-mouth inward to form an inverted structure.

[0016] Preferably, the stab-proof airtight layer is arranged below the carcass cord layer, and both ends of the stab-proof airtight layer extend to the two sub-opening positions respectively, and respectively bypass the sub-openings to form an inverted structure.

[0017] Preferably, the puncture-proof airtight layer is arranged below the carcass cord layer, and the two ends of the puncture-proof airtight layer extend to the two sub-mouth positions respectively, and respectively bypass the sub-mouth to form an outward turn-up structure, and the turn-up end point is located above the sub-mouth between the sub-mouth to the tire shoulder and the carcass cord layer.

[0018] Preferably, the puncture-proof airtight layer is arranged below the carcass cord layer, and the two ends of the puncture-proof airtight layer extend to two sub-opening positions respectively, and respectively bypass the sub-openings to form an outward turn-up structure, and the turn-up end point is located between the tire shoulder or crown and the carcass cord layer.

[0019] Preferably, the carcass ply is located on the inner side of the tire, with both ends of the carcass ply respectively wrapping around the two sub-openings and turned outward, and the two ends respectively extend to the bottom of the tread layer and are cross-laminated with each other.

[0020] In summary, the advantages of the present invention are as follows:

[0021] The air tightness of the vacuum tire can be better enhanced by arranging a puncture-proof airtight layer between the tread layer and the carcass ply or under the carcass ply. The puncture-proof airtight layer is formed by combining one or more layers of canvas after dipping in glue. After dipping in glue, the puncture resistance of the puncture-proof airtight layer can be better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a vacuum tire with a puncture-proof airtight layer attached between the tread layer and the carcass ply;

[0023] Figure 2 is a schematic diagram of a vacuum tire with a puncture-proof airtight layer attached between the tread layer and the carcass ply, and a bead-to-bead structure;

[0024] FIG3 is a schematic diagram of a vacuum tire with a puncture-proof airtight layer attached to the lower surface of the carcass ply;

[0025] Figure 4 is a schematic diagram of a vacuum tire structure in which the puncture-proof airtight layer is attached to the lower surface of the carcass ply and one end extends from the tread to the shoulder;

[0026] Figure 5 shows the structure of canvas with different fiber bundles along the longitude and latitude lines;

[0027] Figure 6 is a schematic structural diagram of a canvas in which both the warp and weft lines are flat fiber bundles;

[0028] Figure 7 is a schematic structural diagram of a multifilament cloth;

[0029] Figure 8 is the air tightness curve of 40-622P-020TR;

[0030] FIG9 is a graph showing the results of an online peeling experiment;

[0031] Reference numerals: 1, tread layer; 2, carcass ply; 3, puncture-proof airtight layer; 11, pattern groove; 31, canvas. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] It should also be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] The following is a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.

[0036] As shown in Figures 1 to 6, an airless vacuum tire is provided with a crown, a shoulder, a bead to a shoulder and a bead, and the tire includes a tread layer 1 and a carcass ply 2. The tread layer 1 is provided above the carcass ply 2 and is located at the crown of the tire. A plurality of pattern grooves 11 are provided on the surface of the tread layer 1 to increase friction and drainage.

[0037] As shown in Figures 1 to 6, the tire also includes a puncture-proof airtight layer 3, which is fixed between the tread layer 1 and the carcass ply 2 or fixed below the carcass ply 2. The puncture-proof airtight layer 3 includes one or more layers of canvas 31. The warp and weft of the canvas 31 are composed of a plurality of filaments, and the canvas 31 is formed into the puncture-proof airtight layer 3 by dipping and coating with glue; the puncture-proof airtight layer 3 at least covers the sub-mouth to the tire shoulder position, and the lower end of the puncture-proof airtight layer 3 extends to the sub-mouth position and forms an inverted structure. The specific structure is described below.

[0038] After the warp and weft threads are combined to form the canvas 31, the canvas 31 needs to be dipped in rubber to make it more airtight. After the dip, the canvas 31 is vulcanized so that it can be combined with the tread layer 1 and the carcass ply 2 to form a vacuum tire.

[0039] Among them, the warp is a flat fiber bundle, and the weft is a quasi-circular fiber bundle; or, both the warp and weft are flat fiber bundles; or, both the warp and weft are quasi-circular fiber bundles; the flat fiber bundle is a fiber bundle composed of 5-30 flat filaments; the quasi-circular fiber bundle is a fiber bundle composed of 5-30 filaments with a quasi-circular cross-section.

[0040] When the warp and weft are quasi-circular fiber bundles, the quasi-circular fiber bundles can be twisted during setting. After the twisting process, the warp and weft will have a more compact structure and will not spread out, thereby ensuring the stability of the structure.

[0041] The width of the flat fiber bundle is 0.5-3.5 mm; the width of the quasi-round fiber bundle is 0.2-1.0 mm.

[0042] The width of the visible light gap of the canvas 31 is set between 0-2 mm, which can ensure that the stab-proof airtight layer 3 has good airtightness.

[0043] As shown in FIG. 1 to FIG. 4 , the puncture-proof airtight layer 3 composed of a canvas 31 can be fixedly arranged between the tread layer 1 and the carcass ply 2 or fixedly arranged below the carcass ply 2 .

[0044] When the puncture-proof airtight layer 3 is provided between the tread layer 1 and the carcass ply 2 , there are two arrangements for the puncture-proof airtight layer 3 , which are as follows.

[0045] 1. As shown in Figure 1, two groups of puncture-proof airtight layers 3 are provided and symmetrically arranged between the tread layer 1 and the carcass cord layer 2; the upper end of one group of puncture-proof airtight layers 3 extends to the tire shoulder or below the tread layer 1, and the lower end extends to the sub-opening position and bypasses the sub-opening to form an inverted structure.

[0046] 2. As shown in FIG2 , the stab-proof airtight layer 3 is provided below the carcass ply 2 , and both ends of the stab-proof airtight layer 3 extend to two sub-opening positions, and respectively bypass the sub-openings to form an inverted structure.

[0047] When the stab-proof airtight layer 3 is arranged below the carcass ply 2 , there are also two arrangements for the stab-proof airtight layer 3 , which are as follows.

[0048] 1. As shown in Figure 3, the stab-proof airtight layer 3 is arranged below the carcass ply 2. The two ends of the stab-proof airtight layer 3 extend to the two sub-mouth positions respectively, and respectively bypass the sub-mouth to form a turn-up structure outward. The turn-up end point is located above the sub-mouth and between the sub-mouth to the tire shoulder and the carcass ply 2.

[0049] 2. As shown in Figure 4, the stab-proof airtight layer 3 is arranged below the carcass ply 2. The two ends of the stab-proof airtight layer 3 extend to the two sub-opening positions respectively, and respectively bypass the sub-openings to form a turn-up structure outward. The turn-up end points are located between the tire shoulder or crown and the carcass ply 2.

[0050] In the four packaging solutions described above, when the end of the stab-resistant airtight layer 3 is located at the tire bead, the end of the stab-resistant airtight layer 3 can be abutted and clamped between the tread layer 1 and the carcass ply 2, or it can be attached to the inner area of ​​the end of the carcass ply 2. It is only necessary to ensure that the end of the stab-resistant airtight layer 3 is within the range of the tire bead. This can ensure the overall strength of the tire.

[0051] The carcass ply 2 may also be located on the inner side of the tire, with both ends of the carcass ply 2 wrapping around the two sub-openings and outward, and the two ends extending to the bottom of the tread layer 1 and being cross-laminated with each other.

[0052] In summary, the advantages of the present invention are as follows:

[0053] By arranging a puncture-proof airtight layer 3 between the tread layer 1 and the carcass ply 2 or under the carcass ply 2, the airtightness of the vacuum tire can be better enhanced, and the puncture-proof airtight layer 3 is composed of one or more layers of canvas 31 and is combined after dipping in glue. After dipping in glue, the puncture resistance of the puncture-proof airtight layer 3 can be better guaranteed.

[0054] 1. Air tightness test:

[0055] This test used the tire structure shown in Figure 1. The stab-resistant innerliner 3 was made of the rubberized canvas shown in Figure 7, with a thickness of 0.8 mm. As shown in Figure 7, the canvas weft yarns consisted of a flat fiber bundle of 15 nylon 6 filaments arranged side by side, while the warp yarns consisted of a quasi-round fiber bundle of 15 nylon 6 filaments. For the comparative example, the stab-resistant innerliner was made of ordinary rubberized canvas, with a thickness of 0.6 mm. The ordinary canvas weft yarns consisted of monofilaments of the same fineness.

[0056] Static test conditions: (add equivalent anti-leakage liquid); rim: 622X23 TC without liner; room temperature: 20±3℃; maximum air pressure: 450 kPa; test time: 72 h.

[0057] Specific comparative data regarding the first arrangement of the puncture-resistant airtight layer 3 between the tread layer 1 and the carcass ply 2 are shown in FIG8 . The multifilament fabric TR is the canvas 31 in this patent, while the TR uses the ordinary canvas in the comparative example. In comparison, the canvas 31 used in this patent has better airtightness.

[0058] The 420D multifilament fabric mentioned above is canvas 31 in this patent, while the 420D monofilament fabric used in the comparative example is ordinary canvas. Compared to the conventional canvas fabric, the 420D multifilament fabric exhibits superior air retention at equivalent thicknesses. Its air tightness is even better under 136°C vulcanization conditions, reaching the same level as a natural rubber innertube of the same thickness. This is presumably because the 420D multifilament fabric is thinner, containing more rubber when tested at the same thickness, which improves air retention.

[0059] 2. Calendering experiment

[0060] This test used the tire structure shown in Figure 1. The stab-resistant innerliner 3 was made of the rubberized canvas shown in Figure 7, with a thickness of 0.8 mm. As shown in Figure 7, the canvas weft yarns consisted of a flat fiber bundle of 15 nylon 6 filaments arranged side by side, while the warp yarns consisted of a quasi-round fiber bundle of 15 nylon 6 filaments. For the comparative example, the stab-resistant innerliner was made of ordinary rubberized canvas, with a thickness of 0.6 mm. The ordinary canvas weft yarns consisted of monofilaments of the same fineness.

[0061] The calendering test data are shown in Table 2:

[0062] Maximum peeling force KN Peeling strength KN / m1-1 Monofilament 0.2037.1371-20.1927.0671-30.2016.805 Average 0.1997.0032-1 Multifilament 0.2187.9732-20.2318.0892-30.2157.996 Average 0.2218.019

[0063] The multifilament 2-1 is the canvas 31 in this patent, while the monofilament 1-1 is the ordinary canvas in the comparative example. In comparison, the canvas 31 used in this patent has better adhesion, with a coverage rate of over 90%. The results of the online peeling test are shown in Figure 9.

[0064] The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments will enable professionals in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A non-inflation vacuum tire, the tire comprising a tread layer (1) and a carcass ply (2), the tread layer (1) being arranged above the carcass ply (2) and located at the tire crown, the surface of the tread layer (1) being provided with a pattern groove (11); It is characterized in that The tire also includes a puncture-proof airtight layer (3), the puncture-proof airtight layer (3) is fixedly arranged between the tread layer (1) and the carcass cord layer (2) or fixedly arranged below the carcass cord layer (2), the puncture-proof airtight layer (3) includes one or more layers of canvas (31), the warp and weft of the canvas (31) are composed of 5 to 30 filaments, and the canvas (31) is formed into the puncture-proof airtight layer (3) by means of dipping and coating. The puncture-proof airtight layer (3) at least covers the area from the tread opening to the tire shoulder position, and the lower end of the puncture-proof airtight layer (3) extends to the tread opening position and forms an inverted structure.

2. The airless vacuum tire according to claim 1, characterized in that: The warp is a flat fiber bundle, and the weft is a quasi-circular fiber bundle; or, the warp is a quasi-circular fiber bundle, and the weft is a flat fiber bundle; or, both the warp and the weft are flat fiber bundles; or, both the warp and the weft are quasi-circular fiber bundles; The flat fiber bundle is a fiber bundle composed of 5 to 30 filaments laid flat; the quasi-circular fiber bundle is a fiber bundle composed of 5 to 30 filaments and having a quasi-circular cross section.

3. The airless vacuum tire according to claim 2, characterized in that: The width of the flat fiber bundle is 0.5-3.5 mm, preferably 1.5-3.0 mm; the width of the quasi-round fiber bundle is 0.2-1.0 mm, preferably 0.5-0.8 mm.

4. The airless vacuum tire according to claim 2, characterized in that: The width of the visible light slit of the canvas is between 0-2 mm, preferably 0.2-1.5 mm.

5. The airless vacuum tire according to claim 2, characterized in that: The quasi-round fiber bundles are twisted.

6. The airless vacuum tire according to claim 1, characterized in that: Two groups of puncture-proof airtight layers (3) are provided and are symmetrically arranged between the tread layer (1) and the carcass cord layer (2); the upper end of one group of puncture-proof airtight layers (3) extends to the tire shoulder or below the tread layer (1), and the lower end extends to the position of the sub-opening and bypasses the sub-opening to form an inverted structure inward.

7. The airless vacuum tire according to claim 1, characterized in that: The puncture-proof airtight layer (3) is arranged below the carcass cord layer (2), and two ends of the puncture-proof airtight layer (3) extend to two sub-opening positions respectively and bypass the sub-openings to form an inverted structure.

8. The airless vacuum tire according to claim 1, characterized in that: The puncture-proof airtight layer (3) is arranged below the carcass cord layer (2), and the two ends of the puncture-proof airtight layer (3) respectively extend to two sub-mouth positions and respectively bypass the sub-mouths to form an outwardly turned-up structure, and the turned-up end point is located above the sub-mouth between the sub-mouth to the tire shoulder and the carcass cord layer (2).

9. The airless vacuum tire according to claim 1, characterized in that: The puncture-proof airtight layer (3) is arranged below the carcass cord layer (2), and the two ends of the puncture-proof airtight layer (3) respectively extend to two sub-opening positions and respectively bypass the sub-openings to form an outwardly turned-up structure, and the turned-up end point is located between the tire shoulder or the tire crown and the carcass cord layer (2).

10. The airless vacuum tire according to claim 1, characterized in that: The carcass cord layer (2) is located on the inner side of the tire, and the two ends of the carcass cord layer (2) are respectively wrapped around the two sub-openings and turned outward, and the two ends are respectively extended to the bottom of the tread layer (1), and are cross-laminated with each other.

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