JP3215481U - Air-filled tire - Google Patents

Abstract

An object of the present invention is to provide an air-filling-free tire that reduces the weight of the tire, ensures cycling comfort and handling stability, and adapts the tire to the usage requirements of light-load, low-speed bicycles and electric bicycles. . SOLUTION: A tread portion 1, a tire middle portion 2 and a tire inner peripheral portion 3 are provided, the upper end of the tire middle portion 2 is connected to the tread portion 1, the lower end is connected to the tire inner peripheral portion 3, and the tire middle portion 2 is provided. The profile of the cross section of the tire is designed in the shape of an “engine”, the middle part 2 of the tire has a short horizontal part at the top, a long horizontal part at the bottom, and a central vertical part. An inner concave surface is connected to the short horizontal portion and the lower long horizontal portion, and both sides of the central vertical portion are recessed inward, and embedded blocks are installed on the inner concave surfaces on both sides of the central vertical portion. [Selection] Figure 3

Description

The present invention relates to a rubber tire technical field, and more particularly to an air-filled tire.

Rubber-filled tires that do not require air filling have advantages such as relatively good wear resistance, safety and durability, but because of their solid structure, the tires are large and heavy, and a great deal of effort is required during cycling. The situation that it is necessary is caused. In the prior art, the majority of air-filled tires have several ring-shaped circumferential holes 20 (as shown in FIG. 1) installed in the carcass 10 or several in the sidewall 30. Arranged axial holes 40 (as shown in Fig. 2) are installed, and by installing holes in each part, the amount of rubber used is reduced, tire weight is increased, and problems such as labor spent on cycling are improved. It was something to do. As a result of the confirmation, the hole opening method certainly reduces the weight, and the air-filled tires with the hole opening structure are widely used in many vehicle types including bicycles and electric bicycles. However, when it comes to bicycles and electric bicycles with low load weight and low speed, bicycles can be wound only by human power, and electric bicycles also have a need for power saving and high running continuity. Since the requirements for weight are more stringent than other vehicles, it is necessary to further reduce the weight of tires that do not require air filling by the conventional hole-opening structure, and there is room for improvement in elasticity and comfort. There is.

As shown in FIGS. 1 and 2, in order to ensure cycling stability and comfort, the cross-sectional contours of the air-filled tires should be kept elliptical or nearly circular as in conventional air-filled tires. Even if various holes are installed in the carcass to reduce the weight, the overall effect of reducing the weight is limited by the outline of the cross section filled with the elliptical or almost circular contents. In order to further reduce the weight, it is necessary to increase the proportion of the holes in the carcass, for example, by increasing the distribution density of the holes or increasing the volume of the holes. Since the strength of the carcass is lowered, especially after a certain period of use, carcass softening is likely to occur, and the amount of subsidence (of the tire) increases, which affects cycling comfort and steering stability.

From the above, it can be said that conventional air-filled tires are not suitable for bicycles and electric bicycles with relatively small payload weight and relatively low speed, and research and development of new-type air-filled tires is not possible. However, it is necessary to overcome the above-mentioned defects, and the present invention is for solving these problems.

The object of the present invention is to provide a tire that does not require air filling, reduce the weight of the tire, ensure the comfort of cycling and the stability of maneuvering, and use the tire at light loads, low speed bicycles and electric bicycles. To meet the requirements.

In order to achieve the above object, the technical solution of the present invention is:
An air-filled tire, having a tread portion, a tire middle portion, and a tire inner peripheral portion, a tire middle upper end connected to the tread portion, a lower end connected to the tire inner peripheral portion, and a cross section of the tire middle portion The contour is designed in the shape of a craft, the middle part of the tire has a short horizontal part at the top, a long horizontal part at the bottom, and a central vertical part, and the upper and lower ends in the radial direction of the central vertical part are short horizontal parts at the top. Providing an air-filling-free tire that is connected to the long horizontal part at the bottom and has an inner concave surface that is recessed inward on both sides of the central vertical part, and embedded blocks are installed on the inner concave surfaces on both sides of the central vertical part It is.

Furthermore, the short horizontal part of the upper part of the middle part of the tire is installed at the bottom part of the tread part, and both ends in the axial direction of the short horizontal part of the upper part smoothly transition downward in an arc shape.

Further, a long horizontal portion at the lower part of the middle part of the tire is installed at the top of the inner peripheral part of the tire, and a smooth upward curl in an arc shape is installed at both ends of the lower long horizontal part in the axial direction.

Further, the central vertical part is installed at the center position of the middle part of the tire.

Furthermore, the upper and lower ends of the central vertical portion in the radial direction are rounded and connected to both the upper short horizontal portion axial ends and the lower long horizontal portion axial ends.

Furthermore, the width of the lower long horizontal axis is wider than the width of the upper short horizontal axis, the width of the upper short horizontal axis is wider than the width of the central vertical axis, and the width of the central vertical axis is larger. The width is set to 35% -50% of the width in the lower horizontal axis direction.

Further, the height in the tire middle radial direction is set to 55% -70% of the total height of the tire cross section, and the height in the central vertical portion radial direction is set to 55% -70% of the height in the tire middle radial direction. The

Furthermore, the inner concave surfaces on both sides of the central vertical portion are arc surfaces.

Further, the inner convex surface of the embedding block and the arc surfaces on both sides of the central vertical portion are fitted to each other, the arc radius of the inner convex surface of the embedding block is equal to the arc radius of the arc surface of the central vertical portion, and the arc of the outer convex surface of the embedding block. The radius is larger than the arc radius of the inner convex surface.

Furthermore, the upper and lower ends of the outer convex surface of the embedding block are connected in an arc shape to both ends of the upper horizontal portion in the short horizontal axis direction and both ends of the lower long horizontal portion axis direction.

Furthermore, the embedding blocks are installed at equal intervals along the entire circumference of the inner concave surface.

Further, the number of embedded blocks installed on the inner concave surfaces on both sides of the central vertical part is equal, and the positions of the embedded blocks on both sides are relatively shifted.

Further, a hole is provided in the bottom of the inner concave surface between adjacent embedded blocks on the inner concave surface on the same side.

Further, the hole diameter gradually decreases from the outside toward the inside.

Furthermore, the hole diameter of the hole continuously narrows from the outside to the inside.

Furthermore, the hole diameter of the hole narrows stepwise from the outside to the inside, and a hole with a step is installed.

Furthermore, the embedding block is integrally formed with the air-filling-free tire, or the embedding block and the air-filling-free tire are processed independently and then assembled in combination.

If the above technical solution is adopted, the outline of the cross section of the middle part of the tire of the present invention is designed to be a “work” shape, and the middle part of the tire has a short horizontal part at the top, a long horizontal part at the bottom, and a central vertical part. The central vertical portion has both upper and lower ends in the radial direction connected to the short horizontal portion at the top and the long horizontal portion at the bottom, respectively. Since the outline of the engine is designed in the shape of an “engine”, the weight can be reduced and the elasticity and comfort of the tire can be improved, thereby ensuring the comfort of cycling and the stability of maneuvering. The tires that do not need to be filled are adapted to the usage requirements of light-load, low-speed bicycles and electric bicycles, and embedding blocks are installed on the inner concave surfaces on both sides of the central vertical part to enhance the strength of the carcass.

A hole is installed in the bottom of the inner concave surface between the adjacent embedded blocks on the inner concave surface on the same side, which compensates for the disadvantage of increasing the weight, equalizing the strength in the tire circumferential direction, and further improving comfort during cycling Improve maneuvering stability.

It is a figure which shows the outline | summary of the cross section of the air filling unnecessary tire in a prior art. It is a figure which shows the outline | summary of the cross section of another air filling unnecessary tire in a prior art. It is a figure which shows the outline | summary of the cross section of the tire in this invention. It is an enlarged view of the tire middle part of the tire in this invention. It is a figure which shows the one part outline | summary of the tire front view in this invention. It is sectional drawing of AA 'in FIG. It is a figure which shows the outline | summary of the part of the three-dimensional figure after adding the embedding block to the tire in this invention; It is a figure which shows the outline | summary of a part of front view after adding the embedding block to the tire in this invention. It is sectional drawing of BB 'in FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings and specific embodiments.
3 to 9 show an air-filling-free tire disclosed in the present invention, and the air-filling-free tire is made of a rubber material. As shown in FIG. 3, the vertical direction is defined as the tire radial direction, and the horizontal direction is defined as the tire axial direction. As shown in FIG. 5, CL indicates a tread center line, the left side of the tread center line CL is defined as the lower mold of the tire, and the right side of the tread center line CL is defined as the tire upper mold.

As shown in FIG. 3, the air-filled unnecessary tire has a tread portion 1, a tire middle portion 2, and a tire inner peripheral portion 3, and a pattern is disposed on the tread portion 1 to come into contact with the ground. The part 3 is mounted on the rim, the upper end of the tire middle part 2 is connected to the tread part 1, and the lower end is connected to the tire inner peripheral part 3. After the air filling unnecessary tire is attached to the rim, the tread portion 1 and the tire middle portion 2 are attached to the outside of the rim receiver, and the tire inner peripheral portion 3 is attached to the inside of the rim receiver. For easy understanding, in FIGS. 3 and 4, the dotted line L is assumed to be a carcass boundary after the tire is attached to the rim.

As shown in FIG. 3 and FIG. 4, the contour of the cross section of the tire middle portion 2 is designed in a “work” shape, and the tire middle portion 2 has a short horizontal portion 21 on the upper portion that forms a short “one” portion of the “work” shape. And a lower horizontal portion 22 that forms the long “one” portion of the “K” shape, and a central vertical portion 23 that forms the “I” portion of the “K” shape. The upper and lower ends in the radial direction of the central vertical part 23 are connected to the upper horizontal part 21 and the lower horizontal part 22 respectively. Specifically, the short horizontal portion 21 at the top of the tire middle portion 2 is installed at the bottom of the tread portion 1 and the both ends 21a in the axial direction of the short horizontal portion 21 at the top are installed so as to smoothly move downward in an arc shape. , Increase the elasticity of both sides of the tire, improve the external force buffering and vibration prevention ability. A long horizontal portion 22 at the lower portion of the tire middle portion 2 is installed at the top of the tire inner peripheral portion 3, and smooth upward curls are installed in a circular arc shape at both ends 22a of the lower long horizontal portion 22 in the axial direction. The attachment of the inner peripheral part 3 onto the rim is facilitated, and the probability of the tire inner peripheral part 3 coming off the rim can be reduced.

Both sides of the central vertical portion 23 are inner concave surfaces 23a that are recessed inward, and the inner concave surfaces 23a on both sides of the central vertical portion 23 are preferably arcuate surfaces. The upper and lower ends of the central vertical portion 23 in the radial direction are respectively connected to both ends 21a of the upper horizontal portion 21a in the axial direction and both ends 22a of the lower horizontal portion 22 in the axial direction, and are connected via a rounded angle R2. The central vertical portion 23 is installed at the center position of the tire middle portion 2 and mainly exerts a load supporting function.

The width W1 of the lower horizontal portion 22 in the axial direction is the maximum width of the tire cross section, and the width W1 of the lower horizontal portion 22 in the axial direction is wider than the width W2 of the upper horizontal portion 21 in the axial direction and short in the upper portion. The horizontal portion 21 axial width W2 is wider than the central vertical portion 23 axial width W3. In order to secure a sufficient carcass strength and control the increase in weight, the width W3 in the central vertical portion 23 axial direction is set to 35% -50% of the width W1 in the lower horizontal portion 22 axial direction. The height H2 in the two radial directions is set to 55% -70% of the total height H1 of the tire cross section, and the height H3 in the central vertical portion 23 radial direction is 55% -70% of the height H2 in the tire central two radial directions. Set to When the central vertical portion 23 axial width W3 and radial height H3 are set too small, the strength of the middle portion of the tire 2 is insufficient and affects the strength of the entire carcass. The problem of stability failure such as vibration is likely to appear. When the central vertical portion 23 axial width W3 and radial height H3 are set excessively, the volume of the tire middle portion 2 is greatly increased, and not only the weight of the tire cannot be reduced, but also the tire middle portion 2 However, by designing it in an “engine” shape, there is a risk of weakening the superiority of capability and performance such as elasticity and vibration prevention. From the above, based on the light load and low speed characteristics of bicycles and electric bicycles, the optimally designed “engine” -shaped cross section of the tire middle part 2 not only can greatly reduce the weight of the tire, The carcass strength and load-bearing performance are also secured and the elasticity is increased, improving the comfort of cycling.

As shown in FIG. 3 to FIG. 7, in order to enhance the strength of the carcass and improve the stability and comfort especially during cycling, in the inner concave surface 23 a recessed inward on both sides of the central vertical portion 23 of the tire middle portion 2. An embedding block 4 is disposed, and the embedding blocks 4 are disposed at equal intervals along the entire circumference of the tire inner concave surface 23a, and are embedded in the inner concave surface 23a that is recessed inward of the tire upper mold and the tire lower mold. 4 is equal, that is, the number of embedded blocks 4 installed in the inner concave surface 23a on both sides of the central vertical portion 23 is equal, and the embedded blocks 4 on both sides are arranged so as to be shifted from each other with respect to the center line CL of the tread. Is done. The above is aimed at improving the comfort of cycling and the stability of maneuvering by equalizing the strength in the circumferential direction of the tire upper mold and the tire lower mold and ensuring the overall rigidity.

Based on a comprehensive study on the strength and weight of the tire, the thickness W4 of each embedding block 4 is set to 4 mm-12 mm, and preferably the thickness W4 of the embedding block 4 used for a bicycle tire is 4 mm-8 mm. The thickness W4 of the embedded block 4 used for the tire of the electric bicycle is set to 6 mm to 12 mm. When the thickness W4 of the embedding block 4 is less than 4 mm, the embedding block 4 is too thin, and an obvious effect of strengthening the tire cannot be obtained. When the thickness W4 of the embedding block 4 is too thick, the weight is excessively increased and the tire is excessively cured, so that elasticity and comfort are deteriorated.

As shown in FIG. 6, the embedding block 4 is sandwiched between inner concave surfaces 23 a that are recessed inward on both sides of the central vertical portion 23, and is supported between the upper horizontal portion 21 and the lower horizontal portion 22. The inner convex surface 4a of the block 4 and the inner concave surface 23a recessed in the inner direction on both sides of the central vertical portion 23 are mutually fitted. Referring to FIG. 4, specifically, the arc radius R1 ′ of the inner convex surface 4a of the embedding block 4 is equal to the arc radius R1 of the inner concave surface 23a of the central vertical portion 23, and the arc radius of the outer convex surface 4b of the embedding block 4 is equal. R3 is larger than the arc radius R1 ′ of the inner convex surface 4a. Preferably, the arc of the outer convex surface 4b of the embedding block 4 is located at both ends 21a of the upper horizontal portion 21 in the axial direction and both ends 22a of the lower horizontal portion 22 in the axial direction. Connected. Under the condition of receiving a load, the inner convex surface 4a increases the elasticity more smoothly and at the same time, the outer convex surface 4b increases the support capability more smoothly. Therefore, the softening of the carcass and the (tire) settlement due to insufficient strength after use. It is possible to prevent the appearance of a phenomenon such as an increase in maneuvering and improve the stability of maneuvering.

As shown in FIG. 6, after the embedded block 4 is disposed on the inner concave surface 23 a that is recessed in the inner direction, the lower horizontal portion 22 may protrude from the outer convex surface 4 b axially outer edge of the embedded block 4. The overhanging axial width S is controlled within 3 mm to prevent the tire inner peripheral portion 3 from being affected on the rim.

In the present embodiment, the outer convex surface 4b of the embedding block 4 is rectangular, but is not limited to the rectangular shape, and may be any shape that conforms to the S shape and other pattern designs on the tread portion 1. FIG. 7 is a three-dimensional view after adding the embedding block 4 to the tire. The embedding block 4 may be integrally formed with an air-filling unnecessary tire, or may be assembled alone after being processed alone. When the embedding block 4 and the air filling unnecessary tire are integrally formed, a rubber material is uniformly used for the embedding block 4 and the air filling unnecessary tire, and the material of the embedding block 4 is a rubber having high elasticity. Preferably, the rubber hardness of the embedding block 4 is higher than the rubber hardness of the tire that does not require air filling. When manufacturing the embedded block 4 and the tire that does not need air filling independently, the embedded block 4 is made of a plastic part having a light weight and good elasticity, and the inner concave surface in which the air filling unnecessary tire body is depressed after the manufacturing is completed. 23a is inserted.

The arrangement of the embedding block 4 causes an increase in weight. As shown in FIGS. 8 and 9, a hole 5 is provided at the bottom of the inner concave surface 23a between the adjacent embedded blocks 4 in the inner concave surface 23a on the same side of the central vertical portion 23, so that the tire upper mold and the tire lower mold are embedded. Since the blocks 4 are arranged so as to be shifted from each other with respect to the center line CL of the tread, the position in the central axis direction of the hole 5 of the tire upper mold accurately corresponds to the embedded block 4 of the tire lower mold. The position of the hole 5 in the central axis direction accurately corresponds to the embedding block 4 of the tire upper mold. This installation not only compensates for the increase in overall weight caused by the embedding block 4, but also equalizes the circumferential strength of the upper and lower tire molds, and stability and comfort during cycling. Can be maintained. In order to ensure the strength of the tire, the hole 5 is preferably a blind hole that sinks inward, and the hole diameter gradually changes from the outside toward the inside. In this embodiment, the hole diameter of the hole 5 is outside. Narrows continuously from the inside toward the inside. Needless to say, the hole 5 may be a stepped hole whose diameter decreases stepwise.

In summary, the outline of the cross section of the tire middle portion 2 to which the tread portion 1 and the tire inner peripheral portion 3 of the present invention are connected is designed in an “engine” shape, and a short horizontal portion 21 at the top and a long horizontal portion at the bottom. 22 and a central vertical portion 23. Both sides of the central vertical portion 23 are arcuate surfaces that are recessed inward, and the upper and lower ends in the radial direction of the central vertical portion 23 are respectively connected to the upper horizontal portion 21 and the lower horizontal portion 22. The design of each of the parameters is optimized, and the profile of the “C” shaped cross section can not only reduce the weight but also improve the elasticity and comfort of the tire.

The embedded blocks 4 are alternately installed in the arcuate surfaces of the upper and lower tires, and the strength of the carcass is strengthened, and the hole 5 is installed at the bottom of the corresponding arcuate surface in the axial direction of the embedded block 4. It compensates for the disadvantage of increased weight, equalizes the circumferential strength of the upper and lower tire molds, and improves comfort and handling stability during cycling.

The following is a description of the comparison of the performance test results of the respective examples and the prior art in the present invention.
In accordance with the technical solution of the present invention, three types of rubber material air-free tires were prototyped. The standard is 24 × 1.50, and the weight and performance were compared with two conventional types of air-filled tires. The two conventional structures were set to 100 points as a reference, and the points were increased as the weight was reduced. The performance test method is that each comparison target tire is attached to the front and rear wheels of a 24-inch bicycle, and the person who performed cycling performs sensory evaluation. The higher the score, the better the comfort and stability. Indicates.

The table below shows the results obtained by testing the conventional structure and three examples. The tire weights of the three examples employing the technical solution of the present invention are all lighter than the conventional structure, and the comfort and stability are improved in the second and third examples. It was revealed that the overall evaluation score of 3 was the highest, which meant that the overall performance of Example 3 was the best.

The above is only a description of a preferred embodiment of the present invention, and is not intended to limit the design of the present invention. All modifications with equivalent modifications based on the important points of the design of the present invention are described in the present invention. Falls within the scope of protection.

Carcass 10 Circumferential hole 20
Side wall 30 Axial hole 40
Tread part 1 Tire middle part 2
Upper horizontal portion 21 Lower lower horizontal portion 22
Center vertical part 23 Tire inner peripheral part 3
Embedded block 4 Hole 5

Claims (10)

An air-filling-free tire having a tread portion, a tire middle portion, and a tire inner peripheral portion, an upper end of the tire middle portion connected to the tread portion and a lower end connected to the tire inner peripheral portion, The contour is designed in the shape of a craft, the middle part of the tire has a short horizontal part at the top, a long horizontal part at the bottom, and a central vertical part, and the upper and lower ends in the radial direction of the central vertical part are short horizontal parts at the top. The inner concave surface is connected to the long horizontal portion at the bottom, and both sides of the central vertical portion are recessed inward, and embedded blocks are installed on the inner concave surfaces on both sides of the central vertical portion.
An air-filling-free tire characterized by that. The short horizontal part at the top of the middle part of the tire is installed at the bottom of the tread part, both ends in the axial direction of the short horizontal part of the upper part transition smoothly downward in an arc shape, and the long horizontal part at the bottom of the middle part of the tire is the inner circumference part of the tire Is installed at the top of the bottom, and the lower horizontal part of the long horizontal part is installed in a circular arc-like smooth upward curl,
The air-filled unnecessary tire according to claim 1. The central vertical part is installed at the center position of the middle part of the tire, and the upper and lower ends in the radial direction of the central vertical part are rounded and connected to both ends of the upper short horizontal part and both ends of the lower long horizontal part. ,
The air-filled unnecessary tire according to claim 1. The width of the lower long horizontal axis is wider than the width of the upper short horizontal axis, the width of the upper short horizontal axis is wider than the width of the central vertical axis, and the width of the central vertical axis is larger. 35% -50% of the width in the axial direction of the long horizontal part of the lower part, the height in the tire radial direction is set to 55% -70% of the total height of the tire cross section, and the height in the central vertical part radial direction Is set to 55% -70% of the height in the tire radial direction,
The air-filled unnecessary tire according to claim 1. The inner concave surface on both sides of the central vertical part is an arc surface, the inner convex surface of the embedding block and the arc surface on both sides of the central vertical part are fitted to each other, and the arc radius of the inner convex surface of the embedding block and the arc surface of the arc surface of the central vertical part The radius is the same, the arc radius of the outer convex surface of the embedding block is larger than the arc radius of the inner convex surface, and the upper and lower ends of the outer convex surface of the embedding block are at both ends in the upper short horizontal axis direction and at both ends in the lower long horizontal axis direction. Each connected in an arc,
The air-filled unnecessary tire according to claim 1. The embedded blocks are installed at equal intervals along the entire circumference of the inner concave surface, the number of embedded blocks installed on the inner concave surface on both sides of the central vertical part is equal, and the positions of the embedded blocks on both sides are relatively shifted. The
The air-filled unnecessary tire according to claim 1. A hole is installed at the bottom of the inner concave surface between adjacent embedded blocks on the inner concave surface on the same side,
The air-filled unnecessary tire according to claim 6. The hole diameter of the hole gradually narrows from the outside to the inside,
The air-filled unnecessary tire according to claim 7. The hole diameter of the hole continuously narrows from the outside to the inside, or the hole diameter of the hole narrows stepwise from the outside to the inside, and a stepped hole is installed,
An air-filled unnecessary tire according to claim 8. The embedding block is integrally formed with the air-filling-free tire, or the embedding block and the air-filling-free tire are processed independently and then assembled in combination.
The air-filled unnecessary tire according to claim 1.

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