JPH10338007A - Tire with lug - Google Patents
Tire with lugInfo
- Publication number
- JPH10338007A JPH10338007A JP9151000A JP15100097A JPH10338007A JP H10338007 A JPH10338007 A JP H10338007A JP 9151000 A JP9151000 A JP 9151000A JP 15100097 A JP15100097 A JP 15100097A JP H10338007 A JPH10338007 A JP H10338007A
- Authority
- JP
- Japan
- Prior art keywords
- lug
- tire
- lugs
- tip
- soil
- 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.)
- Granted
Links
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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/08—Tyres specially adapted for particular applications for agricultural vehicles
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、農業用トラクタ等
に使用されるラグ付きタイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lug tire used for agricultural tractors and the like.
【０００２】[0002]
【従来の技術】この種のタイヤとして、例えば、特開平
８−３４２１０号公報に記載のものが公知である。前記
従来のものは、ラグの中央側先端部をタイヤ赤道付近に
終焉させ、その先端部にタイヤ軸方向に対して実質的に
平行に形成している先端壁面を設け、この先端壁面をタ
イヤ軸心を含む面に対して３０°以上の大角度で傾斜さ
せることにより、前記先端壁面で土壌を下向きに押し固
め、その固めた土をラグが蹴ることによってより大きな
浮揚力とトラクションを発生させるものであった。2. Description of the Related Art As this kind of tire, for example, a tire described in Japanese Patent Application Laid-Open No. 8-34210 is known. In the prior art, the center end of the lug is terminated near the tire equator, and a tip wall formed substantially parallel to the tire axial direction is provided at the tip of the lug. By inclining the soil downward at the tip wall surface by inclining at a large angle of 30 ° or more with respect to the plane including the heart, and generating a greater buoyancy and traction by kicking the solidified soil with a rug Met.
【０００３】[0003]
【発明が解決しようとする課題】しかし、前記従来のも
のは、ラグ先端壁面をタイヤ軸心を含む面に対して３０
°以上の大角度で傾斜させているので、特に混み合った
クラウン部中央域における隣接ラグ先端部間の空間が狭
くなり、ラグ間の土詰まりが発生しやすく、牽引力が低
減するおそれがあった。However, in the above-mentioned prior art, the lug tip wall surface is set at 30 degrees with respect to the plane including the tire axis.
°, the space between the tips of the adjacent lugs, especially in the central area of the crowded crown, is narrowed, and the clogging between the lugs is likely to occur and the tractive force may be reduced. .
【０００４】また、前記先端面の角度を３０°以下にす
ると、前記問題は解消されるが、土壌を掘り起こし、圃
場を荒らすおそれがあった。そこで、本発明は、ラグ間
の土詰まりの発生を防止し、また、圃場を荒らすことの
ないラグ付きタイヤを提供することを目的とする。[0004] If the angle of the front end face is set to 30 ° or less, the above-mentioned problem is solved, but there is a risk that soil will be dug up and the field will be roughened. Thus, an object of the present invention is to provide a tire with a rug that prevents the occurrence of clogging between rugs and does not ruin the field.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、次の手段を講じた。即ち、第１の手段
は、タイヤ赤道面の両側のトレッド部に、交互に配置さ
れたラグを有するラグ付きタイヤにおいて、前記ラグの
赤道面に位置する先端部が、タイヤ軸方向に対して１０
°〜４５°の角度で傾斜している点にある。In order to achieve the above object, the present invention takes the following measures. That is, the first means is that, in a tire with lugs having lugs arranged alternately on tread portions on both sides of the tire equatorial plane, the tip located on the equatorial plane of the lugs is 10 ° with respect to the tire axial direction.
The point is that it is inclined at an angle of 45 ° to 45 °.
【０００６】前記構成の本発明によれば、ラグ先端壁面
をタイヤ軸心を含む面に対して３０°以上の大角度で傾
斜させてトラクション等の向上を図っても、その先端部
が、タイヤ軸方向に対して１０°〜４５°の角度で傾斜
しているので、より排土性が向上し、牽引力の低下が防
止される。また前記目的を達成するための第２の手段
は、タイヤ赤道面の両側のトレッド部に、交互に配置さ
れたラグを有するラグ付きタイヤにおいて、前記ラグの
赤道面に位置する先端部の壁面が、複数段のテーパ面で
形成されている点にある。According to the present invention having the above construction, even if the rug tip wall surface is inclined at a large angle of 30 ° or more with respect to the plane including the tire axis to improve traction and the like, the tip end portion of the tire is not Since it is inclined at an angle of 10 ° to 45 ° with respect to the axial direction, the earth discharging property is further improved, and a decrease in traction force is prevented. Further, a second means for achieving the above object is to provide a rugged tire having lugs arranged alternately on tread portions on both sides of the tire equatorial plane, wherein a wall surface at a tip portion located on the equatorial plane of the lug is provided. In that it is formed by a plurality of tapered surfaces.
【０００７】前記構成の本発明によれば、複数段のテー
パ面の角度選定を適切に行うことにより、排土性を改良
することができると共に、ラグの踏み込み時の土の押し
固めを向上させ、圃場を荒らすことなく、湿田性能を確
保することができる。According to the present invention having the above-described structure, by appropriately selecting the angles of the tapered surfaces of a plurality of steps, it is possible to improve the soil discharging property and to improve the compaction of the soil when the rug is stepped on. Thus, the performance of the wetland can be ensured without damaging the field.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態を、図
面に基づき説明する。図１、２において示すものは、空
気入りラグ付きタイヤであり、該タイヤは、左右一対の
サイド部１と、該両サイド部１をつなぐトレッド部２と
からなり、該トレッド部２の軸方向中央がタイヤ赤道面
３とされている。前記トレッド部２には、前記赤道面３
を介してその両側にラグ４が、交互に且つハの字状に配
設されている。そして、前記ラグ４は、タイヤが回転す
る際に、ラグ４の赤道面３に位置する先端部５が先に接
地し、ラグ４のショルダー部側が遅れて接地するよう形
成されている。Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a tire with a pneumatic lug. The tire includes a pair of left and right side portions 1 and a tread portion 2 connecting the both side portions 1, and an axial direction of the tread portion 2. The center is the tire equatorial plane 3. The tread portion 2 includes the equatorial plane 3
The lugs 4 are alternately arranged on both sides thereof in a V shape. The lug 4 is formed such that when the tire rotates, the tip 5 located on the equatorial plane 3 of the lug 4 comes into contact with the ground first, and the shoulder side of the lug 4 comes into contact with a delay.
【０００９】図３に示すように、前記ラグ４の先端部５
の壁面６のタイヤ直径７に対する傾斜角度αは、３０°
以上とされている。そして、図４に示すように、前記ラ
グ４の先端部５のタイヤ軸方向８に対する傾斜角度θ
は、１０°〜４５°とされており、好ましくは、１５°
〜３０°とされている。前記ラグ先端部５の壁面６のタ
イヤ直径７に対する傾斜角度αを３０°以上にすると、
土の踏み固めが良好になり、圃場を荒らさなくなるが、
逆に、赤道付近のラグ間のスペースが極端に狭くなり、
排土性が悪くなる。しかし、本発明では、ラグ４の先端
部５のタイヤ軸方向８に対する傾斜角度θを、１０°〜
４５°としているので、隣接する隣のラグ４とのスペー
スが開放されることになり、排土性が良くなり、牽引力
のアップにつながる。[0009] As shown in FIG.
The inclination angle α of the wall surface 6 with respect to the tire diameter 7 is 30 °
That is all. Then, as shown in FIG. 4, the tip 5 of the lug 4 has an inclination angle θ with respect to the tire axial direction 8.
Is set to 10 ° to 45 °, preferably 15 °
３０30 °. When the inclination angle α of the wall surface 6 of the lug tip 5 with respect to the tire diameter 7 is set to 30 ° or more,
The compaction of the soil is improved, and the field is not damaged,
Conversely, the space between the lugs near the equator becomes extremely narrow,
The earth discharging property becomes worse. However, in the present invention, the inclination angle θ of the tip 5 of the lug 4 with respect to the tire axial direction 8 is 10 ° to 10 °.
Since the angle is set to 45 °, the space between the adjacent lug 4 is opened, so that the earth discharging property is improved and the traction force is increased.
【００１０】前記傾斜角度θが１０°以下では、排土性
の効果が殆ど無く、４５°以上では、ラグ先端部５の剛
性が低下し、偏摩耗が発生し、耐久性能が低下する。
尚、ラグ４の先端部５のタイヤ軸方向８に対する傾斜角
度θを、１０°〜４５°として、ラグ先端部５の壁面６
のタイヤ直径７に対する傾斜角度αを３０°以下、好ま
しくは、１０°〜２５°に設定すれば、排土性と踏み固
め性の両方をより良好に満足させることができる。If the inclination angle θ is less than 10 °, there is almost no effect of the earth discharging property. If the inclination angle θ is more than 45 °, the rigidity of the lug tip 5 decreases, uneven wear occurs, and durability performance decreases.
The tip angle 5 of the tip 5 of the lug 4 with respect to the tire axial direction 8 is set to 10 ° to 45 °, and the wall 6 of the tip 5 of the lug 4 is
If the inclination angle α of the tire with respect to the tire diameter 7 is set to 30 ° or less, preferably 10 ° to 25 °, both of the soil discharging property and the compaction property can be more favorably satisfied.
【００１１】図５〜８に示すものは、ラグ４の先端部５
の壁面６を複数段のテーパ面で形成したものである。こ
の場合、ラグ４の先端部５のタイヤ軸方向８に対する傾
斜角度θは、０°〜４５°の範囲を取り得る。このよう
に、ラグ４の先端部５の壁面６を複数段のテーパ面で構
成することにより、排土性の改良が図られる。図５に示
すものは、ラグ４の先端部５の壁面６を２段のテーパ面
で形成し、各テーパ面のタイヤ直径７に対する角度α1
、β1 は、α1 ≧β1 とされ、５０°＞α1 ＞２５
°、５０°＞β1 ＞１０°とされ、且つ、α1 ＋β1 ≦
８０°とされている。尚、前記角度α1 、β1 が５０°
を越えるとラグ間隔が狭くなり排土性が悪くなり、ま
た、タイヤ重量が大きくなり好ましくない。FIGS. 5 to 8 show a lug 4 having a tip 5.
Is formed by a plurality of tapered surfaces. In this case, the inclination angle θ of the tip 5 of the lug 4 with respect to the tire axial direction 8 can be in the range of 0 ° to 45 °. As described above, by forming the wall surface 6 of the tip portion 5 of the lug 4 with a plurality of tapered surfaces, the earth discharging property is improved. In FIG. 5, the wall surface 6 of the tip portion 5 of the lug 4 is formed by a two-step tapered surface, and each tapered surface has an angle α1 with respect to the tire diameter 7.
, Β1 are set to α1 ≧ β1, and 50 °>α1> 25
°, 50 °>β1> 10 °, and α1 + β1 ≤
80 °. Note that the angles α1 and β1 are 50 °
If it exceeds, the lug interval becomes narrow and the earth discharging property deteriorates, and the tire weight increases, which is not preferable.
【００１２】また、２段テーパの変曲点の高さｈとラグ
の高さＨの比は、０．１≦ｈ／Ｈ≦０．９とされてい
る。図６に示すものは、ラグ４の先端部５の壁面６を２
段のテーパ面で形成し、各テーパ面のタイヤ直径７に対
する角度α2 、β2 は、α2 ＜β2 とされ、５０°＞α
2 ＞１０°、５０°＞β2 ＞２５°とされ、且つ、α2
＋β2 ≦８０°とされている。The ratio between the height h of the inflection point of the two-stage taper and the height H of the lug is set to 0.1 ≦ h / H ≦ 0.9. FIG. 6 shows that the wall 6 of the tip 5 of the lug 4 is
The angles α2 and β2 of each tapered surface with respect to the tire diameter 7 are α2 <β2 and 50 °> α.
2> 10 °, 50 °>β2> 25 ° and α2
+ Β2 ≦ 80 °.
【００１３】また、２段テーパの変曲点の高さｈとラグ
の高さＨの比は、０．１≦ｈ／Ｈ≦０．９とされてい
る。図７、８に示すものは、ラグ４の先端部５の壁面６
を３段のテーパ面で形成し、各テーパ面のタイヤ直径７
に対する角度は、α3 、β3 、γ3 及びα4 、β4、γ4
とされている。これらの角度設定は、α、β、γの何
れが最大、中間、最小とされてもよいが、一番小さい角
度は１０°以上で５０°以下、一番大きな角度は２５°
以上で５０°以下の範囲とされ、中間の角度はそれらの
中間値とされている。そして、各テーパの変曲点までの
距離ｈ1 、ｈ2 、ｈ3 は、任意に設定されている。The ratio of the height h of the inflection point of the two-stage taper to the height H of the lug is set to 0.1 ≦ h / H ≦ 0.9. 7 and 8 show a wall 6 of the tip 5 of the lug 4.
Are formed with three steps of tapered surfaces, and the tire diameter of each tapered surface is 7
Are angles α3, β3, γ3 and α4, β4, γ4
It has been. For these angle settings, any of α, β, and γ may be the maximum, middle, and minimum, but the smallest angle is 10 ° or more and 50 ° or less, and the largest angle is 25 °.
The above is a range of 50 ° or less, and an intermediate angle is an intermediate value between them. The distances h1, h2, h3 to the inflection point of each taper are set arbitrarily.
【００１４】ラグ先端部５の壁面６を複数段のテーパ面
で形成することにより、一段テーパに比べて、周方向に
隣接するラグ間のクリアランスが大きくなり、赤道付近
での泥詰まりが少なくなる。また、一段テーパに比べ
て、タイヤのゴムボリュームが減少して軽減化できる。
そして、複数段に設定することにより、圃場を荒らすこ
となく湿田性能を確保することができる。By forming the wall surface 6 of the lug tip 5 with a plurality of tapered surfaces, the clearance between the lugs adjacent in the circumferential direction is increased and the mud clogging near the equator is reduced as compared with a single step taper. . In addition, the rubber volume of the tire can be reduced and reduced as compared with a single-step taper.
And, by setting a plurality of stages, it is possible to secure wetland performance without damaging the field.
【００１５】尚、前記図５〜８に示す複数段のテーパ面
は、ラグの先端部に限らず、図４に示す断面Ｃ−Ｃの両
側壁面又は片側壁面に採用してもよい。本発明は、前記
実施の形態に限定されるものではない。The tapered surfaces of the plurality of steps shown in FIGS. 5 to 8 are not limited to the front end portions of the lugs, but may be employed on both side wall surfaces or one side wall surface of the cross section CC shown in FIG. The present invention is not limited to the above embodiment.
【００１６】[0016]
【発明の効果】本発明によれば、周方向に隣接する赤道
付近におけるラグ間の排土性が向上するものである。According to the present invention, the discharging property between the lugs near the equator adjacent in the circumferential direction is improved.
【図１】図１は、本発明の実施の形態を示すラグ付きタ
イヤの平面図である。FIG. 1 is a plan view of a tire with lugs showing an embodiment of the present invention.
【図２】図２は、図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along line AA of FIG. 1;
【図３】図３は、図１のＢ−Ｂ線断面図である。FIG. 3 is a sectional view taken along line BB of FIG. 1;
【図４】図４は、赤道面に位置するラグ先端部の平面図
である。FIG. 4 is a plan view of a lug tip located on an equatorial plane.
【図５】図５は、ラグ先端部の壁面を２段テーパ面とし
たＢ−Ｂ線断面図である。FIG. 5 is a cross-sectional view taken along the line BB of FIG.
【図６】図６は、ラグ先端部の壁面を２段テーパ面とし
たＢ−Ｂ線断面図である。FIG. 6 is a cross-sectional view taken along the line BB of FIG.
【図７】図７は、ラグ先端部の壁面を３段テーパ面とし
たＢ−Ｂ線断面図である。FIG. 7 is a cross-sectional view taken along the line BB of FIG.
【図８】図８は、ラグ先端部の壁面を３段テーパ面とし
たＢ−Ｂ線断面図である。FIG. 8 is a cross-sectional view taken along the line BB of FIG.
２ トレッド部 ３ 赤道面 ４ ラグ ５ 先端部 ６ 壁面 ８ タイヤ軸方向 2 Tread 3 Equatorial plane 4 Lug 5 Tip 6 Wall 8 Tire axial direction
Claims (2)
互に配置されたラグを有するラグ付きタイヤにおいて、 前記ラグの赤道面に位置する先端部が、タイヤ軸方向に
対して１０°〜４５°の角度で傾斜していることを特徴
とするラグ付きタイヤ。1. A tire with lugs having lugs arranged alternately on tread portions on both sides of a tire equatorial plane, wherein the tip of the lugs located on the equatorial plane has an angle of 10 ° to 45 ° with respect to the tire axial direction. A lug tire characterized by being inclined at an angle of °.
に配置されたラグを有するラグ付きタイヤにおいて、 前記ラグの赤道面に位置する先端部の壁面が、複数段の
テーパ面で形成されていることを特徴とするラグ付きタ
イヤ。2. A tire with lugs having lugs arranged alternately on tread portions on both sides of a tire equatorial plane, wherein a wall surface of a tip located on the equatorial plane of the lugs is formed by a plurality of tapered surfaces. A tire with a lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15100097A JP3319977B2 (en) | 1997-06-09 | 1997-06-09 | Lug tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15100097A JP3319977B2 (en) | 1997-06-09 | 1997-06-09 | Lug tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10338007A true JPH10338007A (en) | 1998-12-22 |
| JP3319977B2 JP3319977B2 (en) | 2002-09-03 |
Family
ID=15509104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15100097A Expired - Fee Related JP3319977B2 (en) | 1997-06-09 | 1997-06-09 | Lug tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3319977B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004299459A (en) * | 2003-03-28 | 2004-10-28 | Sumitomo Rubber Ind Ltd | Agricultural tire |
| JP2006327454A (en) * | 2005-05-27 | 2006-12-07 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2007283943A (en) * | 2006-04-18 | 2007-11-01 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| US20090084478A1 (en) * | 2007-10-01 | 2009-04-02 | Wallet Bill J | Irrigation tire |
| US20130213541A1 (en) * | 2012-02-21 | 2013-08-22 | Wayne Birkenholz | Agricultural Bar Nose to Prevent Stubble Damage |
| US11305587B2 (en) * | 2017-06-14 | 2022-04-19 | Compagnie Generale Des Etablissements Michelin | Agricultural vehicle tire |
-
1997
- 1997-06-09 JP JP15100097A patent/JP3319977B2/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004299459A (en) * | 2003-03-28 | 2004-10-28 | Sumitomo Rubber Ind Ltd | Agricultural tire |
| JP4578061B2 (en) * | 2003-03-28 | 2010-11-10 | 住友ゴム工業株式会社 | Agricultural tires |
| JP4719509B2 (en) * | 2005-05-27 | 2011-07-06 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP2006327454A (en) * | 2005-05-27 | 2006-12-07 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2007283943A (en) * | 2006-04-18 | 2007-11-01 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| US9649886B2 (en) | 2007-10-01 | 2017-05-16 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
| US20130276946A1 (en) * | 2007-10-01 | 2013-10-24 | Bridgestone Firestone North American Tire, Llc | Irrigation Tire |
| US9108469B2 (en) * | 2007-10-01 | 2015-08-18 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
| US20090084478A1 (en) * | 2007-10-01 | 2009-04-02 | Wallet Bill J | Irrigation tire |
| CN104175809B (en) * | 2007-10-01 | 2017-07-14 | 普利司通美国轮胎运营有限责任公司 | Irrigation tire |
| US9873291B2 (en) | 2007-10-01 | 2018-01-23 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
| US10272724B2 (en) | 2007-10-01 | 2019-04-30 | Bridgestone Americas Tire Operations, Llc | Irrigation tire |
| US20130213541A1 (en) * | 2012-02-21 | 2013-08-22 | Wayne Birkenholz | Agricultural Bar Nose to Prevent Stubble Damage |
| CN104136240A (en) * | 2012-02-21 | 2014-11-05 | 普利司通美国轮胎运营有限责任公司 | Agricultural bar nose to prevent stubble damage |
| JP2015509881A (en) * | 2012-02-21 | 2015-04-02 | ブリヂストン アメリカズ タイヤ オペレイションズ エルエルシー | Agricultural stick nose to avoid stubble damage |
| US9522575B2 (en) * | 2012-02-21 | 2016-12-20 | Bridgestone Americas Tire Operations, Llc | Agricultural bar nose to prevent stubble damage |
| US20170144489A1 (en) * | 2012-02-21 | 2017-05-25 | Bridgestone Americas Tire Operations, Llc | Agricultural Bar Nose To Prevent Stubble Damage |
| US11305587B2 (en) * | 2017-06-14 | 2022-04-19 | Compagnie Generale Des Etablissements Michelin | Agricultural vehicle tire |
Also Published As
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|---|---|
| JP3319977B2 (en) | 2002-09-03 |
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