JPS6341793B2 - - Google Patents
Info
- Publication number
- JPS6341793B2 JPS6341793B2 JP4257880A JP4257880A JPS6341793B2 JP S6341793 B2 JPS6341793 B2 JP S6341793B2 JP 4257880 A JP4257880 A JP 4257880A JP 4257880 A JP4257880 A JP 4257880A JP S6341793 B2 JPS6341793 B2 JP S6341793B2
- Authority
- JP
- Japan
- Prior art keywords
- idler
- annular
- track
- rim
- annular member
- 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.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920001875 Ebonite Polymers 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
Landscapes
- Harvester Elements (AREA)
- Tires In General (AREA)
Description
【発明の詳細な説明】
本発明は、装軌式車輌のアイドラまわりにおけ
る騒音低減装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a noise reduction device around an idler of a tracked vehicle.
従来、装軌式車輌のアイドラまわりにおける騒
音低減装置としては、トラツクチエーンのトラツ
クリンクレール面とアイドラ踏面との間の直接係
合による金属打音を緩和させるために、アイドラ
外周面にトラツクチエーンのトラツクブツシユを
半径外方に弾圧支持する硬質ゴムよりなる環状体
を設け、該環状体をアイドラ外周の両側縁部に沿
つてボルト止めされる左右一対のアイドラ踏面を
形成するリング状リムにより挾圧保持させたもの
が提案されているが、かゝる硬質ゴムよりなる環
状体を直接金属性のトラツクブツシユに係合させ
たのでは該トラツクブツシユとのくり返し接触に
より環状体が早期に摩耗し、寿命が短い欠点があ
る。また、硬質ゴムよりなる環状体をクツシヨン
部材として使用したのでは十分大きなクツシヨン
ストロークを得ることができず、十分な消音効果
が得られない。さらに、硬質ゴムよりなる環状体
はその外径高さを調整することができないため
に、トラツクブツシユとのくり返し接触によつて
環状体が摩耗限界に至つた場合には使用不可能と
なり新規製品と交換されねばならず、比較的苛酷
な条件で使用され、従つて寿命の短いこの種の騒
音低減装置としては極めて不経済である。 Conventionally, as a noise reduction device around the idler of a tracked vehicle, a track chain is installed on the outer circumferential surface of the idler in order to reduce metal tapping noise caused by direct engagement between the track link rail surface of the track chain and the idler tread. An annular body made of hard rubber is provided to elastically support the track bushing radially outward, and the annular body is held in place by ring-shaped rims forming a pair of left and right idler treads bolted along both side edges of the idler outer periphery. However, if such an annular body made of hard rubber is directly engaged with a metal track bushing, the annular body will wear out prematurely due to repeated contact with the track bushing, resulting in a short service life. There are drawbacks. Further, if an annular body made of hard rubber is used as a cushion member, a sufficiently large cushion stroke cannot be obtained, and a sufficient noise reduction effect cannot be obtained. Furthermore, since the outer diameter and height of the annular body made of hard rubber cannot be adjusted, if the annular body reaches its wear limit due to repeated contact with the truck bushing, it will become unusable and be replaced with a new product. This is extremely uneconomical for this type of noise reduction device, which has to be used under relatively harsh conditions and has a short lifespan.
本発明は上記従来の欠点を除去すべくなされた
ものであつて、このため本発明は装軌式車輌のア
イドラまわりにおける騒音低減装置であつて、前
記アイドラの外周面に沿つてエアチユーブ又は中
実ゴムリングよりなる弾性環状体を周設するとと
もに該弾性環状体の外面上に重ねて硬質ナイロン
又は硬質プラスチツクよりなる硬質耐摩性の環状
部材を周設し、該環状部材の両側部に設けた環状
溝内にアイドラ外周の各側縁部に沿つて取外可能
に固定されたアイドラ踏面を形成する左右一対の
リムを係合させることにより該環状部材を半径に
増減し得るごとく係合保持し、該環状部材の外周
面により当該アイドラまわりに捲装されたトラツ
クチエーンのトラツクブツシユを半径外方に押圧
して該トラツクチエーンのトラツクリンクを前記
アイドラ踏面より離間せしめ、かつ前記各リムの
半径外方端部を左右のトラツクリンク間に位置せ
しめたことを特徴とする。 The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and for this reason, the present invention is a noise reduction device around an idler of a tracked vehicle, which includes an air tube or a solid structure along the outer peripheral surface of the idler. An elastic annular body made of a rubber ring is provided around the circumference, and a hard wear-resistant annular member made of hard nylon or hard plastic is provided around the outer surface of the elastic annular body, and an annular member is provided on both sides of the annular member. A pair of left and right rims forming idler treads removably fixed in the groove along each side edge of the outer periphery of the idler are engaged with each other so that the annular member can be increased or decreased in radius; The outer peripheral surface of the annular member presses the track bush of the track chain wrapped around the idler radially outward to separate the track link of the track chain from the idler tread surface, and the radially outer end of each rim It is characterized in that the part is located between the left and right track links.
以下、添附図面に沿つて本発明の好適な実施例
につき説明するに、図は本発明による騒音低減装
置を備えたアイドラ外周部の中央断面を示してお
り、アイドラ１は内部に砂等の吸音材を充てんさ
れる中空室２を含む本体３と、該アイドラ本体３
外周の各側縁部に沿つて該アイドラ本体３にボル
ト４により取外し可能に固定されかつ当該アイド
ラ１まわりに捲装されるトラツクチエーン５の各
トラツクリンク６と係合可能なアイドラ踏面７を
形成する左右一対のリム８とを備えている。該リ
ム８はリング状に一体に形成されたリムであつて
もよく、また分割環状リムであつてもよい。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The figures show a central cross section of the outer periphery of an idler equipped with a noise reduction device according to the present invention. a body 3 including a hollow chamber 2 filled with material; and the idler body 3
Idler treads 7 are removably fixed to the idler body 3 by bolts 4 along each side edge of the outer periphery and are engageable with each track link 6 of the track chain 5 wrapped around the idler 1. A pair of left and right rims 8 are provided. The rim 8 may be an integrally formed ring-shaped rim, or may be a split annular rim.
本発明による騒音低減装置はアイドラ本体３の
外周面９に沿つて周設されたエアチユーブ１０
と、該エアチユーブ１０の上に重ねて周設された
環状部材１１とを含み、これらエアチユーブ１０
および環状部材１１は上記一対のリム８，８間に
配置され、かつ環状部材１１の両側部に設けられ
た環状溝１２内に上記一対のリム８，８内縁部に
突出形成された環状突起１３を係合させることに
よりアイドラ本体３まわりに保持されている。上
記エアチユーブ１０は図示しないバルブを介して
内圧に調整されるようになつている。また、上記
環状部材１１は、例えば硬質ナイロンや硬質プラ
スチツクのごとき硬質耐摩耗性の材料よりなり、
かつ少くともリングの一部分に切離し部を有し、
これによりエアチユーブ１０の膨張、収縮に応じ
て半径を増減できるようになつている。この環状
部材１１の半径の増減を可能とすべく、上記各リ
ム８の環状突起１３は環状部材１１側面の環状溝
１２内に緩みを以て係合されている。上記各リム
８より外方に突出した環状部材１１の外周部分は
トラツクチエーン５のトラツクブツシユ１４を支
持するフランジ部１５を形成している。上記エア
チユーブ１０の内圧は、環状部材１１のフランジ
部１５が常時トラツクチエーン５のトラツクブツ
シユ１４を半径外方に押圧してトラツクリンク６
とアイドラ踏面７との間を引き離し、かつトラツ
クチエーン５に所定の力が作用した際にフランジ
部１５が半径内方に後退してトラツクリンク６と
アイドラ踏面７との係合を許すように調整され、
これによりトラツクリンク６とアイドラ踏面７と
の直接接触による金属打音を緩和して騒音を低減
させるようになつている。しかも、各リム８の半
径外方端部はつねに左右のトラツクリンク６，６
間に位置しているので、トラツクチエーン５から
の側圧に対する支持力が大きく、ステアリング時
においてもいわゆるゲタ外れを生ずるおそれがな
い。 The noise reduction device according to the present invention includes an air tube 10 provided along the outer peripheral surface 9 of the idler body 3.
and an annular member 11 disposed over and around the air tube 10, and these air tubes 10
The annular member 11 is disposed between the pair of rims 8, 8, and an annular projection 13 is formed in an annular groove 12 provided on both sides of the annular member 11 to protrude from the inner edge of the pair of rims 8, 8. The idler body 3 is held around the idler body 3 by engaging with the idler body 3. The air tube 10 is adapted to have an internal pressure adjusted through a valve (not shown). Further, the annular member 11 is made of a hard wear-resistant material such as hard nylon or hard plastic,
and at least a part of the ring has a cut-off part,
This allows the radius to be increased or decreased according to the expansion or contraction of the air tube 10. In order to make it possible to increase or decrease the radius of the annular member 11, the annular protrusion 13 of each rim 8 is loosely engaged in an annular groove 12 on the side surface of the annular member 11. The outer peripheral portion of the annular member 11 projecting outward from each rim 8 forms a flange portion 15 that supports a truck bush 14 of the truck chain 5. The internal pressure of the air tube 10 is maintained by the flange portion 15 of the annular member 11 constantly pressing the track bush 14 of the track chain 5 radially outward.
and the idler tread surface 7, and when a predetermined force is applied to the track chain 5, the flange portion 15 retreats radially inward to allow engagement between the track link 6 and the idler tread surface 7. is,
Thereby, the metal tapping sound caused by direct contact between the track link 6 and the idler tread surface 7 is alleviated, thereby reducing noise. Moreover, the radially outer end of each rim 8 is always connected to the left and right track links 6, 6.
Since it is located in between, the supporting force against the side pressure from the track chain 5 is large, and there is no risk of so-called slippage during steering.
本発明においては、上述したように硬質耐摩性
の環状部材１１によりトラツクブツシユ１４を支
持し、該環状部材１１をエアチユーブ１０により
弾圧するようにしたので、これらエアチユーブ１
０および環状部材１１がトラツクブツシユ１４と
のくり返し接触により早期に摩耗することがな
く、この種の騒音低減装置の寿命を大巾に伸ばす
ことができる。また、環状部材１１が使用限界ま
で摩耗した場合にもエアチユーブ１０を交換する
ことなく環状部材１１のみを交換すればよいので
経済的である。さらに、トラツクブツシユ１４と
係合する環状部材１１と該環状部材にクツシヨン
力を付与する手段とを分離したことにより、クツ
シヨン部材として硬質ゴムより大きなクツシヨン
ストロークが得られるエアチユーブ１０を使用す
ることが可能となり、これにより消音効果を増す
ことができる。特に、クツシヨン部材として上記
のように内圧調整可能なエアチユーブ１０を用い
ることにより、環状部材１１がトラツクブツシユ
１４とのくり返し接触によりその高さがかなりの
程度減少する迄摩耗しても、エアチユーブ１０の
内圧を増大することにより再びトラツクリンク６
とアイドラ踏面７間に所望のクツシヨンストロー
クを形成することができる。 In the present invention, as described above, the track bushing 14 is supported by the hard, wear-resistant annular member 11, and the annular member 11 is compressed by the air tube 10.
0 and the annular member 11 are not worn out prematurely due to repeated contact with the track bushing 14, and the life of this type of noise reduction device can be greatly extended. Furthermore, even if the annular member 11 is worn to the limit of its use, it is only necessary to replace the annular member 11 without replacing the air tube 10, which is economical. Furthermore, by separating the annular member 11 that engages with the track bushing 14 from the means for applying cushioning force to the annular member, it is possible to use the air tube 10 as the cushion member, which can provide a larger cushion stroke than hard rubber. Therefore, the silencing effect can be increased. In particular, by using the air tube 10 whose internal pressure can be adjusted as described above as a cushion member, even if the annular member 11 is worn to the extent that its height is considerably reduced due to repeated contact with the track bushing 14, the internal pressure of the air tube 10 can be adjusted. By increasing the track link 6
A desired cushion stroke can be formed between the idler tread surface 7 and the idler tread surface 7.
なお、上記実施例においてはクツシヨン部材と
して特に内圧調整可能なエアチユーブを用いてい
るが、該エアチユーブの代りに弾性に富む中実ゴ
ムリングを使用することも可能である。また、環
状部材は少くとも一個所に切離し部を含んでいる
が変形可能なものであれば切離し部は必ずしも必
要ではなく、さらに該部材の断面形状は図示のも
のに限定されることなく、一対のリム間において
半径を増減できるように係合されるものならば他
の形状をもとり得る。 In the above embodiment, an air tube whose internal pressure can be adjusted is used as the cushion member, but a highly elastic solid rubber ring may be used instead of the air tube. Further, although the annular member includes a cut-off part at least in one place, the cut-off part is not necessarily necessary as long as it is deformable, and the cross-sectional shape of the member is not limited to that shown in the drawings. Other shapes may be used as long as the rims are engaged to increase or decrease the radius between the rims.
図は本発明の一実施例装置を備えたアイドラ外
周部の中央断面図を示す。
１……アイドラ、３……アイドラ本体、５……
トラツクチエーン、６……トラツクリンク、７…
…アイドラ踏面、８……リム、９……外周面、１
０……エアチユーブ、１１……環状部材、１４…
…トラツクブツシユ。
The figure shows a central sectional view of the outer periphery of an idler equipped with an embodiment of the present invention. 1...Idler, 3...Idler body, 5...
Truck chain, 6... Truck link, 7...
...Idler tread, 8...Rim, 9...Outer surface, 1
0... Air tube, 11... Annular member, 14...
…Truckbutsuyu.
Claims (1)
減装置であつて、前記アイドラの外周面に沿つて
エアーチユーブ又は中実ゴムリングよりなる弾性
環状体を周設するとともに該弾性環状体の外面上
に重ねて硬質ナイロン又は硬質プラスチツクより
なる硬質耐摩性の環状部材を周設し、該環状部材
の両側部に設けた環状溝内にアイドラ外周の各側
縁部に沿つて取外し可能に固定されたアイドラ踏
面を形成する左右一対のリムを係合させることに
より該環状部材を半径を増減し得るごとく係合保
持し、該環状部材の外周面により当該アイドラま
わりに捲装されたトラツクチエーンのトラツクブ
ツシユを半径外方に押圧して該トラツクチエーン
のトラツクリンクを前記アイドラ踏面より離間せ
しめ、かつ前記各リムの半径外方端部を左右のト
ラツクリンク間に位置せしめたことを特徴とする
騒音低減装置。 ２ 前記リムが一体形成の環リム又は分割環状リ
ムよりなる特許請求の範囲第１項による装置。[Scope of Claims] 1. A noise reduction device around an idler of a tracked vehicle, which includes an elastic annular body made of an air tube or a solid rubber ring provided around the outer peripheral surface of the idler, and the elastic annular body made of an air tube or a solid rubber ring. A hard wear-resistant annular member made of hard nylon or hard plastic is placed over the outer surface of the body, and can be removed along each side edge of the idler outer periphery within the annular groove provided on both sides of the annular member. The annular member is engaged and held so that the radius can be increased or decreased by engaging a pair of left and right rims forming an idler tread fixed to the rim, and the outer peripheral surface of the annular member is used to wrap a track around the idler. The track link of the track chain is separated from the idler tread surface by pressing the track bush of the chain radially outward, and the radially outer end of each rim is positioned between the left and right track links. Noise reduction device. 2. A device according to claim 1, wherein the rim is an integral annular rim or a split annular rim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4257880A JPS56138068A (en) | 1980-04-01 | 1980-04-01 | Device for reducing noise generated around idler in crawler type vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4257880A JPS56138068A (en) | 1980-04-01 | 1980-04-01 | Device for reducing noise generated around idler in crawler type vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56138068A JPS56138068A (en) | 1981-10-28 |
| JPS6341793B2 true JPS6341793B2 (en) | 1988-08-18 |
Family
ID=12639945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4257880A Granted JPS56138068A (en) | 1980-04-01 | 1980-04-01 | Device for reducing noise generated around idler in crawler type vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56138068A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207489A (en) * | 1992-03-19 | 1993-05-04 | Case Corporation | Noise reduction apparatus for a track system of an off-highway implement |
| US5829849A (en) * | 1996-11-27 | 1998-11-03 | Caterpillar Inc. | Undercarriage assembly for attack-type machine |
| US7905559B2 (en) * | 2008-12-10 | 2011-03-15 | Caterpillar Inc | Isolated center tread rim idler wheel |
| US8770676B2 (en) | 2010-12-21 | 2014-07-08 | Caterpillar Inc. | Rotatable idler for undercarriage system in a track-type machine |
| US8770677B2 (en) | 2010-12-21 | 2014-07-08 | Caterpillar Inc. | Compound rim assembly for idler in an undercarriage system of a track-type machine |
| PL2548789T3 (en) | 2011-07-18 | 2014-11-28 | Voegele Ag J | Track assembly |
-
1980
- 1980-04-01 JP JP4257880A patent/JPS56138068A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56138068A (en) | 1981-10-28 |
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