CN217598224U

CN217598224U - Spoke of non-pneumatic tire and forming die of spoke

Info

Publication number: CN217598224U
Application number: CN202121203220.6U
Authority: CN
Inventors: 杨小牛; 李晓文; 赵晓礼
Original assignee: Huangpu Institute of Materials
Current assignee: Huangpu Institute of Materials
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-10-18
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to a tire technical field discloses a non-pneumatic tire's spoke and forming die of this spoke, and this spoke includes central connecting piece and certainly the inside of central connecting piece outwards is four support arms that radially extend, four the support arm is arranged for X shape, is located the central connecting piece top the upper end of support arm is used for being connected with the tread, is located the central connecting piece below the lower extreme of support arm is used for being connected with wheel hub, the support arm is kept away from the one end of central connecting piece is equipped with end connection spare. The utility model discloses a spoke structure can improve non-pneumatic tire's bearing and power transmission ability, and then improves non-pneumatic tire's operability and travelling comfort.

Description

Spoke of non-pneumatic tire and forming die of spoke

Technical Field

The utility model relates to a tire technical field especially relates to a non-pneumatic tire's spoke and forming die of this spoke.

Background

Since the birth of the pneumatic tire, the structure and the preparation process of the pneumatic tire are continuously developed, the performance is continuously improved, the requirements of high load, high speed, strong controllability, good comfort and the like can be met, however, the pneumatic tire always hides the risk of tire burst, and researches show that the highway accidents up to seven percent are caused by tire burst, so that perhaps in the century, the non-pneumatic tire with higher safety factor or the non-pneumatic tire with the higher safety factor can be popularized and applied in a large range.

The load bearing of the conventional pneumatic tire mainly depends on the air pressure in the tire and the tire body, and the whole body is represented as a tensile structure and is quite effective in the aspect of load bearing. Non-pneumatic tires are structurally load-bearing tires, which have structural and material requirements for the spokes connecting the tread and the central hub, in addition to the stiffness requirements for the tread in contact with the ground, in order to better bear, transmit loads, ensure operability and comfort, etc. Operability and comfort of non-pneumatic tires at high speeds present a greater challenge to researchers in the field, both of which require spoke structures to correspond reasonably and effectively to various complex stress conditions during tire operation, in addition to the reasonable design of the tread shear band.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at: the spoke structure is designed to improve the bearing and force transmission capacity of the non-pneumatic tire, and further improve the operability and comfort of the non-pneumatic tire.

In order to achieve the above object, the utility model provides an aspect provides a non-pneumatic tire's spoke, it includes central connecting piece and certainly the inside of central connecting piece outwards is four support arms that radially extend, four the support arm is arranged for the X-shaped, is located the central connecting piece top the upper end of support arm is used for being connected with the tread, is located the central connecting piece below the lower extreme of support arm is used for being connected with wheel hub, the support arm is kept away from the one end of central connecting piece is equipped with end connection spare.

Furthermore, the upper end face of the end connecting piece above the central connecting piece is used for being connected with the tire tread, and the lower end face of the end connecting piece below the central connecting piece is used for being connected with the wheel hub.

Further, the central connecting member, the support arms and the end connecting members are all made of elastic materials.

Further, the supporting arm is made of a rubber composite material.

Further, the end connecting piece is made of rubber or polyurethane materials.

Furthermore, the included angle between the two upper supporting arms is 35-55 degrees, the included angle between the two lower supporting arms is 30-50 degrees, and the included angle between the upper right supporting arm and the lower right supporting arm is 125-145 degrees; the width of the two supporting arms positioned at the upper part is 30-50mm, and the width of the two supporting arms positioned at the lower part is 25-45mm.

Furthermore, the spoke is of a bilaterally symmetrical structure.

The utility model discloses on the other hand still provides a mould, and it is used for the shaping as above any one the spoke, the mould includes cope match-plate pattern, lower bolster and all is located the cope match-plate pattern with template and right well template in the left side between the lower bolster, in a left side template with right well template sets up relatively.

Furthermore, the front end and the rear end of the lower template are respectively provided with a baffle plate.

Furthermore, the inner side of the baffle is provided with a positioning hole forming column.

Compared with the prior art, the spoke of the non-pneumatic tire provided by the technical scheme has the beneficial effects that: arrange for the X-shaped through setting up four support arms, central connecting piece is located X shape central part and connects four support arms, be arranged in non-pneumatic tire with this spoke and connect tread and wheel hub, central connecting piece can play and bear, the buffering, the absorbing effect, four support arms that X shape was arranged are the great structure of bending stiffness, play the transmission load effect, end connection has improved the joint force of support arm with tread or wheel hub, fatigue resistance can, consequently, the bearing and the power transmission ability of non-pneumatic tire can be improved to above-mentioned spoke structure, and then improve non-pneumatic tire's operability and travelling comfort.

Drawings

FIG. 1 is a schematic structural view of a spoke for a non-pneumatic tire in accordance with an embodiment of the present invention;

fig. 2 is an exploded view of the mold according to the embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the present invention are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the embodiment of the present invention provides a spoke for a non-pneumatic tire, which includes a central connecting member 7 and four supporting

arms

3, 10, 6, 13 radially extending from the inside of the central connecting member 7, wherein the four supporting

arms

3, 10, 6, 13 are arranged in an X shape, the upper ends of the supporting arms 3, 10 above the central connecting member 7 are used for being connected with a tire tread, the lower ends of the supporting

arms

6, 13 below the central connecting member 7 are used for being connected with a wheel hub, and one end of the supporting

arm

3, 10, 6, 13 far away from the central connecting member 7 is provided with an

end connecting member

1, 2, 9, 8, 4, 5, 11, 12.

Based on the above scheme, arrange for the X-shaped through setting up four

support arms

3, 10, 6, 13, central connecting piece 7 is located X shape central part and connects four support arms 3 respectively, 10, 6, 13, be used for connecting tread and wheel hub in the non-pneumatic tire with this spoke, central connecting piece 7 can play and bear, the buffering, the absorbing effect, four support arms 3 that X-shaped was arranged, 10, 6, 13 are the great structure of bending rigidity, play the transmission load effect,

end connection

1, 2, 9, 8, 4, 5, 11, 12 has improved the joint force of support arm and tread or wheel hub, fatigue resistance ability, consequently, the bearing and the power transmission ability of non-pneumatic tire can be improved to above-mentioned spoke structure, and then improve non-pneumatic tire's operability and travelling comfort.

As shown in fig. 1, the upper end faces 15 of the

end connecting elements

1, 2, 9, 8 located above the central connecting element 7 are intended to be connected to the tread and the lower end faces 14 of the

end connecting elements

4, 5, 11, 12 located below the central connecting element 7 are intended to be connected to the hub.

Wherein the central connecting member 7, the supporting

arms

3, 10, 6, 13 and the

end connecting members

1, 2, 9, 8, 4, 5, 11, 12 are made of an elastic material.

Specifically, the supporting

arms

3, 10, 6 and 13 are made of rubber composite materials, and can be made of rubber composite resin-based glass fiber materials, and the main characteristics of the supporting arms are that the bending rigidity is large, and the bending rigidity is preferably larger than 100000Nmm ² More preferably more than 200000Nmm ² Particularly preferably 300000Nmm ² . The glass fiber in the resin-based glass fiber material can be in the form of a glass fiber rod or a glass fiber plate, the resin is preferably a resin with high glass transition temperature, such as phenolic vinyl resin, epoxy vinyl resin and the like, and the high glass transition temperature means that the parameter value is more than or equal to 170 ℃.

In addition, the

end connectors

1, 2, 9, 8, 4, 5, 11, 12 are made of rubber or polyurethane material, preferably rubber, with a tensile modulus of preferably 5-10MPa, more preferably 8-10MPa; the elastomeric material used for the central link 7, which may be selected from rubber or polyurethane, preferably rubber, has a tensile modulus preferably in the range of 10 to 35MPa, more preferably in the range of 20 to 35MPa, and especially preferably in the range of 30 to 35MPa.

As shown in fig. 1, the sizes of the

angles

16, 17, 18 and the lengths of the

support arms

3, 10, 6, 13 are contradictory due to space limitations between the tread and the hub, and thus, the angles need to be designed to be matched with each other. Increasing the

angles

16, 18, or decreasing the angle 17, allows to increase to some extent the width of the

support arms

3, 10, 6, 13, but the number of spokes that will eventually be arranged in a circumferential array on the tyre will be reduced, which is detrimental to the load-bearing properties of the final tyre.

As shown in fig. 1, the angle 16 between the two upper supporting arms 3, 10 is 35 ° -55 °, more preferably 40 ° -50 °, particularly preferably 43 ° -48 °; the angle 18 between the two lower supporting

arms

6, 13 is 30 ° to 50 °, more preferably 35 ° to 45 °, particularly preferably 38 ° to 43 °; the angle 17 between the upper right support arm 10 and the lower right support arm 13 is 125 ° -145 °, more preferably 130 ° -140 °, particularly preferably 133 ° -138 °; the width of both the upper supporting arms 3, 10 is 30-50mm, more preferably 35-45mm, particularly preferably 37-42mm; the width of both

support arms

6, 13 lying below is 25-45mm, more preferably 30-40mm, particularly preferably 32-37mm. In the above range, the X-shaped spoke can be more reasonably and effectively used for bearing under the working condition, and has great effects on the stability, operability and comfort of the subsequent vehicle.

As shown in fig. 1, the spoke of the present embodiment has a bilaterally symmetric structure. When the spoke of the embodiment is used in a 215/45N17 tire, the effects of saving materials, reducing the weight of the tire, improving the force transmission efficiency, improving the bearing capacity of the tire and the like can be achieved, and the environmental protection, comfort and operability of the tire can be improved while the basic performance of the tire is ensured. The specification 215/45N17 indicates that the tire has a width of 215mm, a flat rate of 45%, a rim diameter of 17 inches, and an N letter indicates that the tire is a non-pneumatic tire.

As shown in fig. 2, another aspect of the embodiment of the present invention provides a mold for forming a spoke according to the above-mentioned scheme, wherein the mold includes an upper mold plate 19, a lower mold plate 20, and a left middle mold plate 21 and a right middle mold plate 22 both located between the upper mold plate 19 and the lower mold plate 20, and the left middle mold plate 21 and the right middle mold plate 22 are disposed relatively.

Specifically, as shown in fig. 1, the central connecting member 7 is formed by four parts, namely 7a, 7b, 7c and 7d in fig. 1, and the four

parts

7a, 7b, 7c and 7d are preformed and then finally formed into the central connecting member 7 in a mold.

As shown in fig. 2, the front end and the rear end of the lower template 20 are respectively provided with a baffle 23 and a baffle 24, and the two

baffles

23 and 24 are used for limiting the length of the spoke.

In addition, please refer to fig. 2, the inner sides of the

blocking plates

23 and 24 are provided with positioning hole forming pillars 27, the

corresponding blocking plates

23 and 24 are provided with threaded holes 26 for matching with the positioning hole forming pillars 27, the heads of the positioning hole forming pillars 27 are smooth cylindrical surfaces, the tails of the positioning hole forming pillars 27 are provided with threads, the positioning hole forming pillars 27 are used for forming positioning holes on the corresponding surfaces of the spokes, and the positioning holes are used for increasing the stability of the spokes on the tooling device in the subsequent tire forming. The number of threaded holes 26 is not limited and this feature may not be provided.

With reference to fig. 2, the molding method for producing the spoke according to the above scheme by using the mold of the present embodiment is as follows:

when the mold is used, the

baffle plates

23 and 24 are assembled on two sides of the lower template 20, the whole mold is preheated at the temperature ranging from 80 ℃ to 150 ℃, preferably from 100 ℃ to 140 ℃, then the preformed end connecting piece 1 and the

components

7a, 7b and 7c of the central connecting piece 7, the end connecting piece 4, the supporting arm 3, the supporting arm 6, the end connecting piece 2 and the end connecting piece 5 are sequentially placed on the assembled lower template 20, then the left middle template 21 and the right middle template 22 are assembled by the positioning pin 25, the preformed 7c and 7d and the

end connecting pieces

9 and 11, the supporting

arms

10 and 13 and the component 7b of the central connecting piece 7 and the

end connecting pieces

8 and 12 are sequentially placed, finally the upper template 19 is assembled by the positioning pin 25, the whole mold is placed in a flat vulcanizing machine for mold pressing, and heat preservation for a certain time, and then vulcanization molding is carried out. When the product is demoulded, the upper and

lower templates

19 and 20 are demoulded firstly from the upper and lower directions, and the

middle templates

21 and 22 are demoulded from the left and right directions, so that the problem of difficult demoulding of the semi-closed product is effectively avoided.

In summary, the embodiment of the present invention provides a spoke of a non-pneumatic tire and a forming mold for the spoke, which improves the bearing capacity and force transmission capacity of the non-pneumatic tire through the design of the spoke structure, and further improves the operability and comfort of the non-pneumatic tire; through the molding and mold splitting modes of the mold, the problem that a semi-closed product is difficult to demold is effectively avoided.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be considered as the protection scope of the present invention.

Claims

1. The spoke of the non-pneumatic tire is characterized by comprising a central connecting piece and four supporting arms radially extending outwards from the inside of the central connecting piece, wherein the four supporting arms are arranged in an X shape, the upper ends of the supporting arms above the central connecting piece are used for being connected with a tire tread, the lower ends of the supporting arms below the central connecting piece are used for being connected with a wheel hub, and end connecting pieces are arranged at the ends, far away from the central connecting piece, of the supporting arms.

2. A spoke according to claim 1 in which the upper end face of the end connecting element above the central connecting element is intended to be connected to a tread and the lower end face of the end connecting element below the central connecting element is intended to be connected to a wheel hub.

3. A spoke for a non-pneumatic tire according to claim 1, wherein the central link, the support arms and the end links are all made of an elastic material.

4. A spoke for a non-pneumatic tire according to claim 3 in which the support arm is made of a rubber composite material.

5. A spoke according to claim 3 in which the end connectors are made of rubber or polyurethane.

6. A spoke for a non-pneumatic tire according to claim 1 wherein the angle between the two upper support arms is from 35 ° to 55 °, the angle between the two lower support arms is from 30 ° to 50 °, and the angle between the upper right support arm and the lower right support arm is from 125 ° to 145 °; the width of the two supporting arms positioned at the upper part is 30-50mm, and the width of the two supporting arms positioned at the lower part is 25-45mm.

7. A spoke for a non-pneumatic tire according to claim 6 in which the spoke is of a bilaterally symmetrical configuration.

8. A mold for molding the spoke according to any one of claims 1 to 7, comprising an upper mold plate, a lower mold plate, and a left middle mold plate and a right middle mold plate which are arranged between the upper mold plate and the lower mold plate, wherein the left middle mold plate and the right middle mold plate are arranged oppositely.

9. The mold according to claim 8, wherein the front end and the rear end of the lower template are respectively provided with a baffle.

10. The mold of claim 9, wherein the inner side of the baffle is provided with pilot hole forming posts.