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WO2018078933A1 - Tige de goujon et pneumatique pourvu d'une tige de goujon - Google Patents

Tige de goujon et pneumatique pourvu d'une tige de goujon Download PDF

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Publication number
WO2018078933A1
WO2018078933A1 PCT/JP2017/021229 JP2017021229W WO2018078933A1 WO 2018078933 A1 WO2018078933 A1 WO 2018078933A1 JP 2017021229 W JP2017021229 W JP 2017021229W WO 2018078933 A1 WO2018078933 A1 WO 2018078933A1
Authority
WO
WIPO (PCT)
Prior art keywords
stud pin
shaft
edge
tire
stud
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/021229
Other languages
English (en)
Japanese (ja)
Inventor
真由子 和田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Publication of WO2018078933A1 publication Critical patent/WO2018078933A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
    • B60C11/16—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile

Definitions

  • the present invention relates to a stud pin and a pneumatic tire provided with the stud pin.
  • a stud pin there is a known one in which a protrusion is formed at the center of one end surface of the body, a lower flange is formed at the other end, and a holding surface is formed on each of the lower flange and the upper flange of the body (for example, , See Patent Document 1).
  • the conventional stud pin only improves the retention to the tire, and the durability itself is not considered at all.
  • An object of the present invention is to provide a stud pin excellent in durability as well as retaining property in a mounted state, and a pneumatic tire including the stud pin.
  • the present invention provides: Body, A shaft protruding from the body; A stud pin with The shaft has a straight portion parallel to the axis in plan view, A stud pin is characterized in that the axis of the body and the axis of the shaft coincide with each other.
  • the axial center of the body and the axial center of the shaft are matched, an area having a large distance is always formed between the outer edge of the body and one of the sides of the shaft. Therefore, if the stud pin is attached to the pin hole of the tire and travels on the road surface, the outer edge of the body can first collide with the road surface and then the shaft can collide when grounding. As a result, the impact force applied to the shaft can be reduced to make it difficult to damage. That is, the durability of the stud pin can be improved. Moreover, the linear part formed in the shaft acts on the road surface and exhibits an appropriate edge effect.
  • the body is preferably cylindrical.
  • the upper edge of the body has a tapered surface.
  • the shaft is preferably an odd-numbered square in plan view.
  • This configuration allows the shaft to fully exhibit the edge effect in multiple directions. Therefore, if the tire is mounted in the pin hole of the tire, an excellent start, stop, and turning operation can be realized by applying an edge to the road surface at any time of starting running, braking, or turning.
  • the shaft may be composed of a straight portion and an arc portion in plan view.
  • the present invention provides: A stud pin of any one of the above configurations; A pin hole formed in the tread portion and fitted with the stud pin; With The stud pin provides a stud tire characterized in that the straight portion of the shaft is arranged on the tire kicking side so as to be orthogonal to the tire circumferential direction.
  • This configuration makes it possible to maximize the edge effect of the shaft on the tire kicking side at the start of running and improve the traction performance.
  • the present invention provides: A stud pin of any one of the above configurations; A pin hole formed in the tread portion and fitted with the stud pin; With The stud pin provides a stud tire characterized in that the straight portion of the shaft is arranged on the tire stepping side so as to be orthogonal to the tire circumferential direction.
  • This configuration makes it easier for the side surface of the body on the tire stepping side to bite into the road surface during braking, and the braking effect can be improved by exhibiting an edge effect.
  • the axial center of the body and the shaft are made to coincide with each other, the distance between the outer edge of the body and any side of the shaft can be increased. For this reason, if the stud pin having such a configuration is attached to the tire and travels on the road surface, the shaft can collide after the body first collides with the road surface. Therefore, it is possible to reduce the impact force acting on the shaft and improve the durability.
  • FIG. 2 is a development view of a tread portion of a tire to which the stud pin shown in FIG. 1 is attached. It is sectional drawing of the pin hole shown in FIG. It is a top view of the stud pin concerning other embodiments.
  • the stud pin 1 is made of aluminum, an aluminum alloy or the like by molding or the like.
  • the body 2 is formed in a cylindrical shape. Thereby, when it mounts
  • the body 2 is not limited to a cylindrical shape, and may be configured in a polygonal shape connected by a plurality of line segments in plan view. However, it is necessary that the length of the line segment is sufficiently short, that is, close to a circle so as to be in close contact with the inner peripheral surface of the pin hole 26 almost uniformly.
  • the outer edge of the upper surface of the body 2 is constituted by a tapered surface 7.
  • the tapered surface 7 is the first region that comes into contact with the road surface when the stud pin 1 is mounted on a pneumatic tire (stud tire) and travels on the road surface.
  • the tapered surface 7 formed at the upper edge of the side surface 6 is a region that first collides with the road surface. Therefore, when the upper end edge of the body 2 collides with the road surface, it comes into contact with the surface.
  • the tapered surface 7 referred to here includes some curved surface shape as long as it can prevent the sharp portion from colliding with the road surface.
  • the pedestal portion 4 is formed in a vertically long shape in which the maximum length a in the vertical direction and the maximum length b in the horizontal direction satisfy a> b in plan view.
  • a linear portion 9 is formed on one end side in the vertical direction of the pedestal portion 4.
  • the pedestal portion 4 is formed with a protruding portion 11 that protrudes in a triangular shape by two inclined portions 10 on the side opposite to the linear portion 9.
  • the protrusion 11 is symmetrical with respect to the center line in the vertical direction.
  • the angle which the inclination part 10 makes with the centerline of the vertical direction is set so that it may be less than 90 degrees. In particular, this angle is preferably 45 °.
  • Two locations connecting the straight line portion 9 and each inclined portion 10 are arc portions 12.
  • all the parts are connected by a circular arc surface so that an edge is not formed.
  • a tapered surface 13 is formed on the lower surface of the outer edge portion of the pedestal portion 4.
  • the shape of the pedestal portion 4 is not limited to the shape described here, and various shapes can be used as long as the shape expands to the outer diameter side from the body 2 in a plan view, such as a circle and a polygon.
  • FIG. 6 shows an example in which the pedestal 4 is circular in plan view.
  • it is possible to effectively prevent the pin hole 26 from falling off when traveling on the road surface while being mounted on a tire while suppressing an increase in weight by forming it in an irregular shape. It is possible.
  • the shaft 5 includes a first protrusion 14 having an odd-numbered square shape (here, a pentagon) in plan view.
  • the first edge portion 15 of the first protrusion 14 is formed in parallel with the straight portion 9 of the pedestal portion 4.
  • the second edge portion 16 and the third edge portion 17 on both sides adjacent to the first edge portion 15 face each arc portion 12 of the pedestal portion 4.
  • the fourth edge portion 18 adjacent to the second edge portion 16 and the fifth edge portion 19 adjacent to the third edge portion 17 face each inclined portion 10 of the pedestal portion 4.
  • a second protrusion 20 is formed on the upper surface of the first protrusion 14.
  • the second protrusion 20 has a rectangular shape in plan view, and one of the long sides thereof is a sixth edge 21 that is parallel to the first edge 15 of the first protrusion 14.
  • the other edge portions (the seventh edge portion 22, the eighth edge portion 23, and the ninth edge portion 24) of the second protrusion 20 are different in the extending direction from the other edge portions of the first protrusion 14. Yes.
  • the shaft 5 is provided so that its axis coincides with the axis of the body 2. Thereby, a sufficient distance can be secured in all directions from the outer edge of the body 2 to the shaft 5.
  • the number of edge portions of the second protrusion 20 is smaller than that of the first protrusion 14.
  • the first protrusion 14 has five locations and the second protrusion 20 has four locations.
  • the height of the shaft 5 is 0.5 mm or more and 2.5 mm or less here. This is because if it is less than 0.5 mm, the function as the shaft 5 cannot be sufficiently exhibited, and if it exceeds 2.5 mm, the shaft 5 is grounded before the body 2 and is easily damaged.
  • the ratio of the height of the second protrusion 20 to the first protrusion 14 is set to 10% or more and 80% or less. If it is less than 10%, the edge effect of the second protrusion 20 is insufficient, and if it exceeds 80%, the edge effect of the first protrusion 14 cannot be sufficiently exhibited.
  • the shaft 5 can also be composed of three or more stages.
  • the stud pin 1 having the above-described configuration is used by being mounted in a pin hole 26 formed in the tread portion 25 of the stud tire as shown in FIG.
  • the pin hole 26 is composed of a small diameter portion 27 having the same inner diameter and an enlarged diameter portion 28 at the tip thereof.
  • the mounting operation of the stud pin 1 in the pin hole 26 is automatically performed by a pin driving device (not shown).
  • a pin driving device not shown.
  • the shape of the pedestal portion 4 is not a point-symmetrical shape such as a circle, but a vertically long irregular shape as described above, it is possible to easily grasp the direction and accurately attach it to the pin hole 26. it can.
  • the first edge portion 15 of the shaft 5 is positioned on the tire kicking side so as to extend in the tire width direction perpendicular to the tire circumferential direction. In this state, a portion above the upper end portion (tapered surface 7) of the body 2 of the stud pin 1 is exposed from the surface of the tread portion 25.
  • the upper edge of the body 2 first collides with the road surface.
  • the upper end edge of the body 2 is formed by a tapered surface 7. For this reason, even if the upper end edge of the body 2 collides with the road surface, the impact force per unit area on the road surface can be suppressed. As a result, even when traveling on a dry road surface, problems such as road surface cracks can be avoided.
  • the shaft 5 that collides with the road surface is composed of two stages, and the directions of the peripheral sharp edges are different between the first protrusion 14 and the second protrusion 20 except for one point. Therefore, the edge effect can be sufficiently exhibited. That is, if it goes straight, the 1st edge part 15 will act on a road surface (ice surface). Further, when cornering traveling on a curve, the second edge portion 16 or the third edge portion 17 prevents a lateral deviation with respect to the road surface. Further, when the brake is stepped on, the fourth edge portion 18 and the fifth edge portion 19 apply a braking force to the road surface.
  • the body 2 has a cylindrical shape and is in close contact with the inner peripheral surface of the small diameter portion 27 of the pin hole 26 over the entire circumference. Moreover, the shank 3 which became smaller diameter than the body 2 and the base part 4 which became larger diameter than the body 2 following this are provided. Accordingly, the stud pin 1 is effectively prevented from dropping from the pin hole 26.
  • the first edge portion 15 of the first convex portion 14 of the shaft 5 is arranged on the tire kicking side so as to extend in the tire width direction perpendicular to the tire circumferential direction. You may make it arrange
  • the shaft 5 is an odd-numbered square shape in plan view, but it may be configured by one straight line portion and other arc portions.
  • the arc portion may be formed in a substantially arc shape connected by a plurality of line segments having a shorter length than the straight line portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

La présente invention comprend un corps (2) et une tige (5) qui fait saillie du corps (2). La tige (5) a une partie droite qui est parallèle à un axe central dans une vue en plan. L'axe central du corps (2) est aligné avec l'axe central de la tige (5).
PCT/JP2017/021229 2016-10-26 2017-06-08 Tige de goujon et pneumatique pourvu d'une tige de goujon Ceased WO2018078933A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-209190 2016-10-26
JP2016209190A JP2018069816A (ja) 2016-10-26 2016-10-26 スタッドピン及びスタッドピンを備えた空気入りタイヤ

Publications (1)

Publication Number Publication Date
WO2018078933A1 true WO2018078933A1 (fr) 2018-05-03

Family

ID=62024586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/021229 Ceased WO2018078933A1 (fr) 2016-10-26 2017-06-08 Tige de goujon et pneumatique pourvu d'une tige de goujon

Country Status (2)

Country Link
JP (1) JP2018069816A (fr)
WO (1) WO2018078933A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180952A (ja) * 2013-03-19 2014-09-29 Bridgestone Corp スタッドピンおよびこれを用いたタイヤ
JP2016097836A (ja) * 2014-11-21 2016-05-30 株式会社ブリヂストン スタッド、及び、スタッダブルタイヤ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180952A (ja) * 2013-03-19 2014-09-29 Bridgestone Corp スタッドピンおよびこれを用いたタイヤ
JP2016097836A (ja) * 2014-11-21 2016-05-30 株式会社ブリヂストン スタッド、及び、スタッダブルタイヤ

Also Published As

Publication number Publication date
JP2018069816A (ja) 2018-05-10

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