Tire

Abstract

The utility model provides a tire which comprises a tire bead, the tire bead is provided with a first tire bead outer side face, a tire bead outer bottom face and a second tire bead outer side face which are connected with one another, the projection of the tire bead outer bottom face on a preset projection plane is a first projection line, and the projection of the first tire bead outer side face on the preset projection plane is a second projection line; the first projection line comprises a first line segment, a second line segment and a third line segment which are arranged in sequence, an intersection point between an extension line of the second projection line and an extension line of the second line segment is a first reference point, and an intersection point between the first line segment and the second line segment is a first connection point; in the horizontal axial direction of the tire, the distance between one end, far away from the second line segment, of the third line segment and the first reference point is W, the distance between the first reference point and the first connecting point is W2, and W2 is equal to 25%-30% W. The utility model solves the problem that the tire in the prior art cannot give consideration to sufficient contact pressure between the tire and the rim and cannot be installed in place at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire technical field, specifically, relate to a tire. BACKGROUND

[0002] The insufficient combination force between the tire and the rim can cause the tire not to be in full contact with the rim, which can cause the tire to slip relative to the rim; the excessive combination force between the tire and the rim can cause the tire and the rim to be too tightly combined, which can cause the tire to be not installed in place and abnormally stressed, and a gap can exist between the tire bead side and the rim, which can easily cause the tire to be damaged.

[0003] The common tire bead has a toe boss, and the toe has a small-radius arc, so that the space near the toe is smaller than the space near the heel; when the tire and the rim are in full contact and the tire bead bottom is fully contacted and extruded by the rim, the rubber at the tire bead can only move in the direction of the toe, which can cause a gap to exist between the tire bead side and the rim, and the tire can not be installed in place. SUMMARY

[0004] The main purpose of the utility model is to provide a tire to solve the problem that the tire in the prior art cannot simultaneously consider full contact pressure between the tire and the rim and installation of the tire in place.

[0005] To achieve the above-mentioned purpose, the utility model provides a tire, which comprises a tire bead, the tire bead has a first tire bead outer side, a tire bead outer bottom and a second tire bead outer side which are connected to each other, the first tire bead outer side and the tire bead outer bottom are both used for contacting the rim, the projection of the tire bead outer bottom on a preset projection plane is a first projection line, and the projection of the first tire bead outer side on the preset projection plane is a second projection line; in the direction from the tire heel to the tire toe, the first projection line comprises a first line segment, a second line segment and a third line segment which are sequentially arranged, the intersection between the extension line of the second projection line and the extension line of the second line segment is a first reference point, and the intersection between the first line segment and the second line segment is a first connection point; in the horizontal axial direction of the tire, the distance between the end of the third line segment away from the second line segment and the first reference point is W, the distance between the first reference point and the first connection point is W2, and W2=25%-30%W; wherein the extension direction of the preset projection plane is parallel to the extension direction of the horizontal axis of the tire, and the preset projection plane is perpendicular to the circumferential surface of the tire.

[0006] Further, the first line segment comprises a first sub-line segment, a second sub-line segment and a third sub-line segment which are sequentially arranged, the first sub-line segment is arranged away from the second line segment relative to the third sub-line segment, the first sub-line segment and the third sub-line segment are both arc segments, the second sub-line segment is a straight line segment, the intersection between the extension line of the second line segment and the extension line of the second sub-line segment is a second reference point, and in the horizontal axial direction of the tire, the distance between the first reference point and the second reference point is W6, and W6=20%-25%W.

[0007] Further, the first sub-segment, the second sub-segment and the third sub-segment are all arc segments, and the inner diameter of the first sub-segment, the inner diameter of the second sub-segment and the inner diameter of the third sub-segment are the same.

[0008] Further, the first sub-segment, the second sub-segment and the third sub-segment are all straight line segments, and the extension direction of the first sub-segment, the extension direction of the second sub-segment and the extension direction of the third sub-segment are parallel.

[0009] Further, the bead is provided with a steel bead, and the bead also has a bead inner side surface, which is arranged close to the steel bead relative to the bead outer side surface along the vertical axial direction of the tire, the projection of the bead inner side surface on the preset projection plane is a third projection line, the projection of the center of the steel bead on the preset projection plane is a third reference point, and the shortest distance between the third reference point and the third projection line is R1, and when the first sub-segment of the first segment is an arc segment, the radius of the first sub-segment is R; wherein R=R1.

[0010] Further, the included angle θ1 between the third segment and the second segment is in the range of 172°≤θ1≤178°.

[0011] Further, along the horizontal axial direction of the tire, the length of the third segment is W1, and W1=30%~40%W.

[0012] Further, the intersection between the extension line of the second projection line and the extension line of the first sub-segment is a fourth reference point, and along the vertical axial direction of the tire, the distance between the fourth reference point and the first reference point is W3, and W3=W2+(5~15)mm.

[0013] Further, the extension direction of the third segment is parallel to the extension direction of the horizontal axis of the tire, the projection of the center of the tire on the preset projection plane is a sixth reference point, the rim bottom surface is in contact with the bead outer bottom surface, along the vertical axial direction of the tire, the distance between the sixth reference point and the third segment is D1, and the distance between the sixth reference point and the rim bottom surface is Dri, and D1

[0014] Further, the Shore hardness of the bead toe rubber of the tire is 74.

[0015] The utility model discloses a technical scheme, tire includes the bead, the bead has the first bead outer side, the bead outer bottom surface and the second bead outer side of mutual connection, the projection of bead outer bottom surface on the preset projection plane is the first projection line, the projection of first bead outer side on the preset projection plane is the second projection line, by the direction of the heel of the tire to the toe of the tire, the first projection line includes the first line segment, the second line segment and the third line segment that set up in proper order, the intersection between the extension line of second line segment and the extension line of the second projection line is the first reference point, the intersection between the first line segment and the second line segment is the first connecting point, along the horizontal axis direction of tire, the distance between the end of third line segment away from second line segment and the first reference point is W, the distance between the first reference point and the first connecting point is W2, through setting W2=25%~30%W, increase the heel arc, make the space for accommodating rubber material exist in the heel position, make the rubber material at the bead can move to the direction of the toe and the heel when the contact pressure of tire and the rim is sufficient, the bead bottom and the rim are fully contacted and extruded, avoid the gap between the bead side and the rim, further guarantee the tire installation in place, thereby solve the problem that the tire in the prior art can not simultaneously consider the contact pressure of tire and the rim is sufficient and the tire installation in place. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. In the drawings:

[0017] Fig. 1 The structure schematic diagram of the embodiment of the tire according to the utility model (the first subline segment and the third subline segment are all arc line segments, and the second subline segment is a straight line segment) is shown;

[0018] Fig. 2 The structure schematic diagram of the embodiment of the tire according to the utility model (the first subline segment, the second subline segment and the third subline segment are all arc line segments) is shown;

[0019] Fig. 3 The structure schematic diagram of the embodiment of the tire according to the utility model (the first subline segment, the second subline segment and the third subline segment are all straight line segments) is shown;

[0020] Fig. 4 The structure schematic diagram of the embodiment of the tire according to the utility model is shown.

[0021] Among them, the above-mentioned drawing includes the following sign:

[0022] 1. rim; 11, first bead outer side; 12, bead outer bottom; 13, second bead outer side; 14, first projection line; 15, second projection line; 16, first reference point; 17, first connection point; 18, first line segment; 19, second line segment; 110, third line segment; 21, first sub-line segment; 22, second sub-line segment; 23, third sub-line segment; 24, second reference point; 51, bead wire; 53, third projection line; 54, third reference point; 81, fourth reference point; 82, rim bottom; 811, eighth reference point. DETAILED DESCRIPTION

[0023] It is also important to note that the term "exemplary" as used herein means "serving as an example, instance, or illustration," and should not necessarily be construed as preferred or advantageous over other examples. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0024] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the clarity of presentation and are shown exaggerated in relation to each other. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as if the discussion were fully conveyed. In all examples shown and discussed herein, any particular value is to be construed as an example only and not a limitation on the scope of the exemplary embodiments. Other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and therefore, further discussion of these parts is not necessary unless otherwise noted.

[0025] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal", and "top, bottom" and the like are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of the parts themselves.

[0026] Reference is made to Figs. 1 to 4The utility model provides a kind of tire, comprising: bead, bead has mutually connected first bead outer side 11, bead outer bottom 12 and second bead outer side 13, first bead outer side 11 and bead outer bottom 12 are used to contact with rim 1, the projection of bead outer bottom 12 on preset projection plane is first projection line 14, the projection of first bead outer side 11 on preset projection plane is second projection line 15;From the direction of tire heel to toe, first projection line 14 includes sequentially arranged first line segment 18, second line segment 19 and third line segment 110, the intersection between the extension line of second projection line 15 and the extension line of second line segment 19 is first reference point 16, the intersection between first line segment 18 and second line segment 19 is first connecting point 17;Along the horizontal axial direction of tire, the distance between the end of third line segment 110 away from second line segment 19 and first reference point 16 is W, the distance between first reference point 16 and first connecting point 17 is W2, W2=25%~30%W;Wherein, the extension direction of preset projection plane is parallel to the extension direction of the horizontal axis of tire, preset projection plane is perpendicular to the circumferential surface of tire.

[0027] The tire of the utility model includes bead, bead has mutually connected first bead outer side 11, bead outer bottom 12 and second bead outer side 13, the projection of bead outer bottom 12 on preset projection plane is first projection line 14, the projection of first bead outer side 11 on preset projection plane is second projection line 15;From the direction of tire heel to toe, first projection line 14 includes sequentially arranged first line segment 18, second line segment 19 and third line segment 110, the intersection between the extension line of second projection line 15 and the extension line of second line segment 19 is first reference point 16, the intersection between first line segment 18 and second line segment 19 is first connecting point 17;Along the horizontal axial direction of tire, the distance between the end of third line segment 110 away from second line segment 19 and first reference point 16 is W, the distance between first reference point 16 and first connecting point 17 is W2;By setting W2=25%~30%W, increase the heel arc, so that the space for accommodating rubber material exists in heel position, so that the contact pressure of tire and rim is sufficient, when bead bottom and rim are fully contacted and extruded, rubber material at bead can be moved to the direction of toe and heel simultaneously, avoid the gap between bead side and rim, further guarantee that tire is installed in place, thereby solve the problem that tire in prior art cannot simultaneously consider that the contact pressure of tire and rim is sufficient and tire is installed in place.

[0028] In the embodiment, the first line segment 18 comprises a first sub-line segment 21, a second sub-line segment 22 and a third sub-line segment 23 arranged in sequence, the first sub-line segment 21 is arranged away from the second line segment 19 relative to the third sub-line segment 23, the first sub-line segment 21 and the third sub-line segment 23 are both arc line segments, the second sub-line segment 22 is a straight line segment, and an intersection between an extension line of the second line segment 19 and an extension line of the second sub-line segment 22 is a second reference point 24; in the horizontal axial direction of the tire, a distance between the first reference point 16 and the second reference point 24 is W6, and W6 = 20% ~ 25% W.

[0029] Specifically, such an arrangement can avoid a too-small arc of the tire heel due to a too-small W6, avoid a situation that the tire is not installed in place, and also avoid that the rubber at the bottom of the bead moves to the gap between the tire heel and the rim due to a too-large W6, although the tire can be ensured to be installed in place, but the contact pressure between the tire and the rim is reduced, which is easy to cause the tire to slip relative to the rim.

[0030] In the embodiment, the first sub-line segment 21, the second sub-line segment 22 and the third sub-line segment 23 are all arc line segments, and the inner diameter of the first sub-line segment 21, the inner diameter of the second sub-line segment 22 and the inner diameter of the third sub-line segment 23 are the same.

[0031] Specifically, such an arrangement can avoid a too-small arc of the tire heel due to a too-small W2, avoid a situation that the tire is not installed in place, and also avoid that the rubber at the bottom of the bead moves to the gap between the tire heel and the rim due to a too-large W2, although the tire can be ensured to be installed in place, but the contact pressure between the tire and the rim is reduced, which is easy to cause the tire to slip relative to the rim.

[0032] In the embodiment, the first sub-line segment 21, the second sub-line segment 22 and the third sub-line segment 23 are all straight line segments, and the extension direction of the first sub-line segment 21, the extension direction of the second sub-line segment 22 and the extension direction of the third sub-line segment 23 are parallel.

[0033] Specifically, such an arrangement can avoid a too-small arc of the tire heel due to a too-small W2, avoid a situation that the tire is not installed in place, and also avoid that the rubber at the bottom of the bead moves to the gap between the tire heel and the rim due to a too-large W2, although the tire can be ensured to be installed in place, but the contact pressure between the tire and the rim is reduced, which is easy to cause the tire to slip relative to the rim.

[0034] In the embodiment, the bead is provided with a bead wire 51, and the bead also has a bead inner side surface which is arranged close to the bead wire 51 relative to the bead outer side surface along the vertical axial direction of the tire, the projection of the bead inner side surface on the preset projection plane is a third projection line 53, the projection of the center of the bead wire 51 on the preset projection plane is a third reference point 54, the shortest distance between the third reference point 54 and the third projection line 53 is R1, and when the first sub-line segment 21 of the first line segment 18 is an arc segment, the radius of the first sub-line segment 21 is R; wherein R = R1.

[0035] Specifically, such an arrangement can avoid a smaller heel arc due to a smaller radius of the first sub-line segment 21, ensure that there is space for accommodating rubber at the heel position, and enable the rubber at the bead to move in the direction of the toe and the heel at the same time when the bottom of the bead is fully pressed against the rim.

[0036] In the embodiment, the included angle θ1 between the third line segment 110 and the second line segment 19 is in the range of 172°≤ θ1≤ 178°.

[0037] Specifically, such an arrangement can avoid a larger space for accommodating rubber at the toe position, avoid the rubber at the bead moving only in the direction of the toe when the bottom of the bead is fully pressed against the rim, and cause the tire to be not installed in place.

[0038] In the embodiment, the length of the third line segment 110 along the horizontal axial direction of the tire is W1, and W1 = 30% ~ 40% W.

[0039] Specifically, such an arrangement can avoid a larger space for accommodating rubber at the toe position, avoid the rubber at the bead moving only in the direction of the toe when the bottom of the bead is fully pressed against the rim, and cause the tire to be not installed in place.

[0040] In the embodiment, the intersection between the extension line of the second projection line 15 and the extension line of the first sub-line segment 21 is a fourth reference point 81, and the distance between the fourth reference point 81 and the first reference point 16 along the vertical axial direction of the tire is W3, W3 = W2 + (5 ~ 15) mm. The intersection between the extension line of the second projection line 15 and the extension line of the second sub-line segment 22 is an eighth reference point 811, and the distance between the eighth reference point 811 and the first reference point 16 along the vertical axial direction of the tire is W7, W7 = W6 + (5 ~ 15) mm.

[0041] Specifically, such an arrangement can avoid a larger space for accommodating rubber at the toe position, avoid the rubber at the bead moving only in the direction of the toe when the bottom of the bead is fully pressed against the rim, and cause the tire to be not installed in place.

[0042] In the embodiment, the extending direction of the third line segment 110 is parallel to the extending direction of the horizontal axis of the tire, the projection of the center of the tire on the preset projection plane is a sixth reference point, the distance between the sixth reference point and the third line segment 110 is D1, the distance between the sixth reference point and the rim bottom surface 82 is Dri, and D1 < Dri.

[0043] Specifically, by setting D1 < Dri, the tire of the utility model can play a sealing and inflating role by reducing the inner diameter of the tire at the toe position in the case of canceling the toe boss, and the tire inflation leakage phenomenon can be avoided after the bead is installed on the rim 1.

[0044] In the embodiment, the Shore hardness of the bead filler of the tire is 74.

[0045] Specifically, since the bead filler is too soft, the hoop degree of the rim is weak, and the tire is prone to slip relative to the rim 1, and if the bead filler is too hard, the adhesion of the tire is too small, the tire and the rim are too loose, and the tire is prone to slip relative to the rim 1. By setting the Shore hardness of the bead filler of the tire to 74, the tire can be prevented from slipping relative to the rim 1, and the problems of sufficient contact pressure of the tire and the rim and installation of the tire in place can be solved.

[0046] Specifically, the calculation formula of the general compression rate is: H1 / (H2-d), H1 is the compression amount of the tire, H2 is the total thickness of the bead bottom, and d is the diameter of the steel wire; the general compression rate is set to 30% to 35%, because a larger compression rate may face the risk of installation out of place. Although the compression amount of the bead bottom and the compression rate of the tire of the tire of the application are increased, the Shore hardness of the bead filler of the tire is increased, and the tire of the application overcomes the problem that the tire cannot be installed in place under the condition of a large compression rate of the bead, so that the problems of sufficient contact pressure of the tire and the rim and installation of the tire in place can be solved.

[0047] Specifically, when the Shore hardness of the bead filler of the tire is 74, W1 = 30% to 40% W, W6 = 20% to 25% W, and W7 = W6 + (5 to 15) mm, the contact pressure of the tire and the rim is the largest, indicating that the tire can best solve the problems of sufficient contact pressure of the tire and the rim and installation of the tire in place at the same time.

[0048] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0049] The utility model discloses a tire, which comprises a bead, the bead has a first bead outer side 11, a bead outer bottom surface 12 and a second bead outer side 13 connected with each other, the projection of the bead outer bottom surface 12 on a preset projection plane is a first projection line 14, and the projection of the first bead outer side 11 on the preset projection plane is a second projection line 15.

[0050] For convenience in description, spatially relative terms can be used herein for the purpose of illustration. Such terms as "above", "below", "upper", "lower", and the like, can be used herein for example to describe an orientation of one device or feature to another device or feature as the figure is configured to be viewed. It is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device or feature is depicted as being above another device or feature in the figures, it is to be understood that the device or feature can also be below the other device or feature (in a different orientation). Thus, the exemplary term "above" can encompass both an orientation of above and below. The devices can be oriented in other ways (rotated 90 degrees or located in any orientation) and the spatially relative terms used herein interpreted accordingly. Similarly, the term "flanking" can be used herein to describe a position of a device or feature relative to another device or feature, and can be used to describe a position of a device or feature relative to another device or feature in any orientation.

[0051] In addition, it needs to be explained that the words "first", "second" and the like are used to limit the parts, and only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the words have no special meaning, and therefore cannot be understood as the limitation of the protection scope of the present application.

[0052] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tire characterized by, The application relates to a tire, comprising: a bead, the bead having a first bead outer side (11), a bead outer bottom (12) and a second bead outer side (13) connected with each other, the first bead outer side (11) and the bead outer bottom (12) are both used for contacting a rim (1), a projection of the bead outer bottom (12) on a preset projection plane is a first projection line (14), a projection of the first bead outer side (11) on the preset projection plane is a second projection line (15); from the heel of the tire to the toe of the tire, the first projection line (14) comprises a first line segment (18), a second line segment (19) and a third line segment (110) arranged in sequence, an intersection between an extension line of the second projection line (15) and an extension line of the second line segment (19) is a first reference point (16), an intersection between the first line segment (18) and the second line segment (19) is a first connecting point (17); in a horizontal axial direction of the tire, a distance between an end of the third line segment (110) far away from the second line segment (19) and the first reference point (16) is W, a distance between the first reference point (16) and the first connecting point (17) is W2, W2=25%-30%W; wherein, an extension direction of the preset projection plane is parallel to an extension direction of a horizontal shaft of the tire, and the preset projection plane is perpendicular to a circumferential surface of the tire.

2. Tyre according to Claim 1, characterized in that, The first line segment (18) comprises a first sub-line segment (21), a second sub-line segment (22) and a third sub-line segment (23) arranged in sequence, the first sub-line segment (21) is arranged far away from the second line segment (19) relative to the third sub-line segment (23), the first sub-line segment (21) and the third sub-line segment (23) are both arc line segments, the second sub-line segment (22) is a straight line segment, an intersection between an extension line of the second line segment (19) and an extension line of the second sub-line segment (22) is a second reference point (24); in the horizontal axial direction of the tire, a distance between the first reference point (16) and the second reference point (24) is W6, W6=20%-25%W.

3. The tire of claim 1, wherein, The first sub-line segment (21), the second sub-line segment (22) and the third sub-line segment (23) are all arc line segments, an inner diameter of the first sub-line segment (21), an inner diameter of the second sub-line segment (22) and an inner diameter of the third sub-line segment (23) are the same.

4. The tire of claim 1, wherein, The first sub-line segment (21), the second sub-line segment (22) and the third sub-line segment (23) are all straight line segments, an extension direction of the first sub-line segment (21), an extension direction of the second sub-line segment (22) and an extension direction of the third sub-line segment (23) are parallel.

5. The tire of claim 1, wherein, The bead is provided with a steel ring (51), the bead also has a bead inner side surface, which is arranged close to the steel ring (51) relative to the bead outer side surface along the vertical axial direction of the tire, the projection of the bead inner side surface on the preset projection plane is a third projection line (53), the projection of the center of the steel ring (51) on the preset projection plane is a third reference point (54), the shortest distance between the third reference point (54) and the third projection line (53) is R1, when the first sub-line segment (21) of the first line segment (18) is an arc line segment, the radius of the first sub-line segment (21) is R; wherein R=R1.

6. The tire of claim 1, wherein, The included angle θ1 between the third line segment (110) and the second line segment (19) is in the range of 172°≤θ1≤178°.

7. The tire of claim 1, wherein, Along the horizontal axial direction of the tire, the length of the third line segment (110) is W1, and W1=30%-40% W.

8. The tire of claim 1, wherein, The intersection between the extension line of the second projection line (15) and the extension line of the first sub-line segment (21) is a fourth reference point (81), and the distance between the fourth reference point (81) and the first reference point (16) along the vertical axial direction of the tire is W3, W3=W2+(5-15) mm.

9. The tire of claim 1, wherein, The extension direction of the third line segment (110) is parallel to the extension direction of the horizontal axis of the tire, the projection of the center of the tire on the preset projection plane is a sixth reference point, the rim bottom surface (82) is in contact with the bead outer bottom surface, and the distance between the sixth reference point and the third line segment (110) along the vertical axial direction of the tire is D1, the distance between the sixth reference point and the rim bottom surface (82) is Dri, and D1Dri.

10. The tire of claim 1, wherein, The Shore hardness of the sub-portion of the tire is 74.

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