Hollow tire with one tire valve

Abstract

Hollow tire with a tire valve, characterized in that it comprises a tire body (1) and a tire valve (2), wherein the tire valve (2) is arranged inside the tire body (1).

Description

Technical area

[0001] The present invention relates to the field of tires, in particular to a hollow tire with a tire valve. State of the art

[0002] Tires are ground-rolling, elastic rubber products mounted on various vehicles or machines. They are capable of bearing weight, absorbing road shocks, making contact with the road surface, and transmitting driving and braking forces. Tires are exposed to various deformations, loads, forces, and high and low temperatures during driving and must therefore exhibit high load-bearing, traction, and buffering properties.

[0003] Tire technology has also evolved since Dunlop invented the pneumatic tire over 100 years ago. Conventional pneumatic tires are supported by high-pressure air, which provides excellent comfort and cushioning, making them suitable for high speeds. However, there are also disadvantages, such as being easily punctured, slow to deflate, and the need for frequent refills.

[0004] In recent years, the development of electric bicycles and scooters, which are slow and short-distance means of transportation, especially rental e-bikes / e-scooters, has accelerated, so that due to the poor conditions of use, some of them use solid tires, hollow tires and other non-pneumatic tires to avoid the problem of punctures and air loss.Since there is no air support in this type of tire, the tire is subject to various deformations, and the load during driving is borne by the tire body material, so it is easy to cause tire damage. In addition, the tires become heavier. In order to meet regulatory requirements or achieve a longer range, rental e-bikes and e-scooters must be designed with lightweight construction, and the weight of the tires and the design of the body dimensions must be strictly controlled. Because it is difficult for existing technologies to consider the mentioned performance requirements, there is a need to improve the tire structure and develop a tire that combines load capacity, comfort, range and ease of maintenance. Content of the invention

[0005] The aim of the present invention is to solve the above-mentioned problems by means of a hollow tire with a tire valve, wherein the load-bearing capacity is increased by introducing high-pressure air into the hollow tire, while at the same time the required tire body stiffness of the hollow tire and material strength can be reduced, which leads to improved driving comfort and extended tire life.

[0006] To achieve the above-mentioned objectives, the present invention uses the following technical solutions: The present invention provides a hollow tire with a tire valve, comprising a tire body and a tire valve, wherein the tire valve is arranged inside the tire body.

[0007] In a preferred embodiment of the present invention, the shape of the tire body may have various cross-sectional shapes with holes in the cross-sectional shapes, and the tire body may be an outer tire with a tread pattern for direct contact with the road surface or an inner tire without a tread pattern.

[0008] In a preferred embodiment of the present invention, the number of internal bores may be one, two or more.

[0009] In a preferred embodiment of the present invention, the thickness of the outer wall is not less than 5 mm to ensure airtightness and puncture resistance.

[0010] In a preferred embodiment of the present invention, the tire valve is a rubber cushion valve comprising a valve rubber base, valve body, and a valve core, wherein the valve rubber base and the tire body of the hollow tire are bonded together by a rubber vulcanization process to ensure an airtight seal, wherein the valve body is concealed within the tire body of the hollow tire and can be positioned at any location of the cross section of the tire body of the hollow tire.

[0011] The advantageous effect of the present invention is that, compared to conventional hollow tires, the present invention provides a tire valve on the hollow tire, allowing high-pressure gas to be injected to increase the load-bearing capacity and damping performance, and improve the tire's service life. Furthermore, the hollow tire has the same shape as a conventional hollow tire because it is equipped with a built-in valve, which does not interfere with installation. Details of the drawings Fig. 1 Schematic representation of the structure of a hollow tire with a tire valve of the present invention; Fig. 2 Schematic representation I of the structure of section AA of the present invention; Fig. 3 Schematic representation II of the structure of section AA of the present invention; Fig. 4 Schematic representation III of the structure of section AA of the present invention; Fig. 5 Schematic representation of the structure of the cross section of the valve core of a hollow tire with a tire valve of the present invention; Fig. 6 Schematic representation of the structure of the cross section of the tire valve of a hollow tire with a tire valve of the present invention. List of reference symbols

[0012] 1-tire body, 2-tire valve, 3-inner bore, 4-outer wall, 5-valve rubber base, 6-valve body, 7-valve core; 8-valve tappet, 9-mounting thread, 10-valve cap, 11-sealing ring; 12-spring, 13-core body, 14-sealing washer, 15-valve seat, 16-valve core chamber, 17-sealing chamfer. Concrete embodiments

[0013] For a better understanding of the inventive objective, technical solution and advantages, the embodiment of the invention is described in detail below with reference to the drawings and exemplary embodiments in order to comprehensibly illustrate the application of the technical means to solve the problem and the achievement of the technical effects.

[0014] While detailed embodiments are described below to facilitate understanding of the invention, the present invention may be embodied in other forms other than those described herein. Therefore, the scope of the invention is not limited to the specifically disclosed embodiments.

[0015] The concrete embodiments of the invention are described in detail below with reference to the drawings.

[0016] As in Fig.As shown in Figures 1 to 5, this embodiment provides a hollow tire with a tire valve, comprising a tire body 1 and a tire valve 2. The tire valve 2 is disposed within the tire body 1. The shape of the tire body 1 can have various cross-sectional shapes as needed, with inner holes 3 provided in the cross-sectional shape. The tire body 1 can be an outer tire with a tread for use in direct contact with the road surface or an inner tire without a tread. The inner hole 3 mainly serves to dampen vibration, reduce weight to increase comfort, and reduce energy consumption. There can be one, two, or more holes depending on the design requirements of the vehicle load, speed, operating environment, etc.In a preferred embodiment of the present invention, the thickness of the outer wall 4 is not less than 5 mm to ensure airtightness and puncture resistance. The tire body 1 is made of a vulcanized rubber compound comprising a polyblend compound of high-cis polybutadiene rubber, natural rubber, trans-isoprene rubber, and brominated butyl rubber, and polyester fibers are used as a reinforcing agent. As a result, the rubber compound simultaneously exhibits the following properties: low heat generation, high fatigue resistance, increased hardness with good load-bearing capacity, and excellent gas tightness. The gas tightness was tested according to GB / T 1038. Compared with conventional hollow tires, the tire material of the present invention has a gas permeability coefficient of 3.08 × 10 -6 . -13 cm 3 cm / cm 2 ·s·Pa, while standard rubber materials have 5.71 × 10 -13 cm 3 cm / cm 2·s·Pa. This corresponds to a 46% reduction in the permeation rate, achieving excellent gas tightness and eliminating the need for regular maintenance.

[0017] In a preferred embodiment of the present invention, the tire valve 2 is a rubber cushion valve comprising a valve rubber base 5, valve body 6 and a valve core 7, wherein the valve rubber base 5 and the tire body 1 of the hollow tire are bonded to each other by a rubber vulcanization process to ensure an airtight seal, and wherein the valve body 6 is hidden within the tire body of the hollow tire and can be positioned at any location in the cross section of the tire body of the hollow tire, wherein the valve core 7 is arranged in the valve body 6.

[0018] In a preferred embodiment of the present invention, the valve insert 7 comprises a valve tappet 8, a mounting thread 9, a valve cap 10, a sealing ring 11, a spring 12, a core body 13, a sealing disc 14 and a valve seat 15, wherein the valve tappet 8 is provided with the spring 12, the valve cap 10 has the mounting thread 9, the core body 13 is provided with the sealing ring 11, and the sealing disc 14 is provided on the valve seat 15. The valve body 6 is hollow, wherein the cavity is designed as a valve core chamber 16, wherein the valve core chamber 16 has a mounting thread 9 for receiving the valve insert 7 and a sealing bevel 17, the valve tappet 8 is oriented in the direction of the valve rubber base 5, the valve seat 15 is aligned in the direction of the valve body 6, and the valve rubber base 5 with its beveled surface is adapted to the tire body 1 of the hollow tire.The valve rubber base 5 is bonded to the valve body 6 by a vulcanization process to form an integral unit, thereby ensuring gas tightness."

[0019] In contrast to standard valves, in the valve insert according to the invention, the valve tappet 8 is oriented towards the valve rubber base 5, the valve seat 15 is aligned with the valve body 6, wherein the valve rubber base 5 rests with its inclined surface against the tire body 1, and wherein the valve body 6 is completely installed in the tire body 1, the tire valve 2 and the tire body 1 are integrally bonded to one another by a rubber vulcanization process to ensure airtightness. The valve tappet of the valve insert of the conventional tire valve is directed towards one end of the valve body, and the valve seat of the valve insert is directed towards one end of the valve rubber base, wherein the lower plane of the valve rubber base fits onto the tire body of the hollow tire during use, and the tire valve protrudes from the tire body of the hollow tire.When designing the rims and the vehicle structure, the influence of the position of the valve body must be taken into account, whereby an appropriate valve hole must be milled into the rims and collision with the valve bodies protruding from the rim must be avoided when the wheels rotate. Product test results: 1. High-speed testing of wheel / tire combinations

[0020] The test was conducted according to section 5.4 of the GBT 13203-2014 standard using a test drum with a diameter of 1700±17 mm. The tire must be mounted on a rim corresponding to the actual vehicle type and loaded according to the tire specification. The preview phase consists of a running speed of 40 km / h and a running time of 120 minutes, which must be achieved within 5 minutes. After the preview phase, the tire is cooled to 38±3 °C, and the test is accelerated section by section. Phase 1: running speed 50 km / h, running time 60 minutes; Phase 2: running speed 60 km / h, running time 60 minutes; Phase 3: running speed 70 km / h, running time 60 minutes. The time until the speed change must not exceed 1 minute in any phase (except during the preview phase).After the test, the tire must not come loose, the hub must not break, there must be no visible cracks or tears inside the tire, and there must be no heartburn. 2. Fatigue test of the wheel / tire combination

[0021] The test is carried out according to ISO 4210-7, Chapter 4.1, by loading the barrier block 1,000,000 times at 25 km / h (±10%) according to the tire specification. After the test, no tires shall come loose, no wheels shall break, or visible cracks shall appear, and no abnormal phenomena such as internal cracks or heartburn shall occur when the tire is cut.

[0022] Using the example of product validation for the 16×2.50 tire size: Under a load of 150 kg, the existing technology product weighing 2,420 g showed no damage after high-speed and fatigue tests. In contrast, the existing technology product weighing 2,250 g exhibited a 'heart burn phenomenon' (damage in the core area) after both tests (high-speed and fatigue tests). The product of the present invention, weighing 2,230 g, showed no damage after the high-speed and fatigue tests. This clearly shows that state-of-the-art products must meet performance requirements by increasing the material and tire body hardness. However, this simultaneously leads to a loss of comfort and higher costs.In comparison, the patented product has significant advantages: Under the same conditions, it achieves better performance - with lower heat generation, better fatigue resistance, high hardness for optimal support function and good airtightness.

[0023] Although reference has been made herein to illustrative embodiments of the present invention, the examples cited represent merely the preferred embodiments of the invention. The embodiments of the invention are by no means limited to these examples. It is understood that those skilled in the art may devise numerous other modifications and variations within the spirit and scope of the invention disclosed in this application. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited non-patent literature

[0000] ISO 4210-7

[0021]

Claims

[1] Hollow tire with one tire valve, characterized by that it has a tire body (1) and a tire valve (2), wherein the tire valve (2) is arranged inside the tire body (1). [2] Hollow tyre with a tyre valve according to claim 1, characterized by that the tire body (1) is provided with an internal bore (3). [3] Hollow tyre with a tyre valve according to claim 1, characterized by wherein the tire valve (1) is an outer tire with a pattern or an inner tire without a pattern. [4] Hollow tyre with a tyre valve according to claim 2, characterized by that the number of internal bores (3) is one, two or more. [5] Hollow tire with a tire valve according to claim 1, characterized by that the outer wall (4) of the tire body (1) has a thickness of not less than 5 mm. [6] Hollow tyre with a tyre valve according to claim 1, characterized bythat the tire valve (2) is a rubber cushion valve and comprises a valve rubber base (5), valve body (6) and a valve insert (7), wherein the valve rubber base (5) and the tire body (1) of the hollow tire are connected to one another by a rubber vulcanization process, and wherein the valve body (6) is hidden within the tire body (1) of the hollow tire, the valve insert (7) is arranged in the valve body (6). [7] Hollow tyre with a tyre valve according to claim 6, characterized by that the valve insert (7) comprises a valve tappet (8), a mounting thread (9), a valve cap (10), a sealing ring (11), a spring (12), a core body (13), a sealing disc (14) and a valve seat (15), wherein the valve tappet (8) is provided with the spring (12), the valve cap (10) has the mounting thread (9), the core body (13) is provided with the sealing ring (11), and the sealing disc (14) is provided on the valve seat (15). [8] Hollow tyre with a tyre valve according to claim 7, characterized by that the valve body (6) is hollow, wherein the hollow space is designed as a valve core chamber (16), the valve core chamber (16) has a mounting thread (9) for receiving the valve insert (7) and a sealing bevel (17), the valve tappet (8) is oriented in the direction of the valve rubber base (5), the valve seat (15) is aligned in the direction of the valve body (6), and the valve rubber base (5) is adapted with its beveled surface to the tire body (1). [9] Hollow tyre with a tyre valve according to one of claims 1 to 8, characterized by that the tire body (1) is made of vulcanized rubber material, the components of which include high-cis polybutadiene rubber, natural rubber, trans-isoprene rubber, brominated butyl rubber and reinforcing agents, polyester fibers being used as reinforcing agents. [10] Hollow tyre with a tyre valve according to claim 9, characterized by that the tyre body (1) has a gas permeability coefficient of not more than 3.5 × 10 -13 cm 3 cm / cm 2 ·s·Pa.

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