JP3382366B2 - Driving side support device for screw blade for asphalt finisher - Google Patents
Driving side support device for screw blade for asphalt finisherInfo
- Publication number
- JP3382366B2 JP3382366B2 JP18629894A JP18629894A JP3382366B2 JP 3382366 B2 JP3382366 B2 JP 3382366B2 JP 18629894 A JP18629894 A JP 18629894A JP 18629894 A JP18629894 A JP 18629894A JP 3382366 B2 JP3382366 B2 JP 3382366B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- screw blade
- sealing member
- bearing
- drive shaft
- 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 - Fee Related
Links
Landscapes
- Road Paving Machines (AREA)
Description
【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は道路の舗装に用いるアス
ファルトフィニッシャーの合材送り用ねじ羽根の駆動側
支持装置の改良に関する。
【0002】
【従来の技術】図3、図4はアスファルトフィニッシャ
ーの平面図及び側面図である。シャーシー枠1は4つの
車輪2で支持され、搭載した不図示の内燃機関で矢印イ
の方向へ進行するようになっている。シャーシー枠1に
根本をピン13結合されたアーム4端にはスクリード装
置5が設けてある。両側のアーム4先端は横架材で結合
され両アーム間をわたって固定軸7が設けられ、固定軸
7に中央スクリード枠8が回転自在に支持されている。
中央スクリード枠8上端にはナット9の両側が枢着され
ており、該ナツト9にスクリード角度調節ねじ11がね
じ込まれている。該調節ねじ11はアーム4間をわたる
軸12に揺動自在に支持された軸受14に軸方向に移動
しないように支持されている。スクリード角度調節ねじ
11には操作ハンドル10が固定してある。中央スクリ
ード枠8の左右にわたる枠部材には中央スクリード15
が固定されている。中央スクリード15の進行方向の前
端には供給される合材を押しならし中央スクリード15
下面と路盤との間に合材を送り込むための中央スクリー
ド押し板15aが立設してある。中央スクリード枠8に
はワイドナー支持枠16が固定されている。ワイドナー
支持枠16にはワイドナー枠17が左右両側の方向に伸
縮自在に取付けられている。ワイドナー支持枠16には
水平方向に案内として円孔が設けられ、この円孔に案内
部材のガイドバー18が出入り自在に摺動するように嵌
合しており、ガイドバー18の先端にワイドナー枠17
が固定されている。ワイドナー枠17にはワイドナー支
持枠16中に設けた油圧シリンダーのピストンロッド1
9が固定されている。ワイドナー枠17には一体的に中
央スクリード15と同様に合材を押しながらワイドナー
スクリード21のアイロン部と路盤間に合材を送り込む
ためのワイドナースクリード押し板21aが設けられ、
該押し板21aはワイドナー支持枠16に出入り自在に
支持されている。中央スクリード15は車輛の進行方向
に該ワイドナースクリード21より前方に有り、両者は
端部が重なっている。ワイドナースクリード21と中央
スクリード15の下面は同一平面上に存在する。
【0003】図4に示すようにシャーシー枠1とアーム
4に両端の枢着された上下方向のクレビス型油圧シリン
ダ22はアーム4をピン13を中心に回動し、スクリー
ド装置5を上下動させる。スクリード装置5には不図示
のスクリード15,21の加振装置を備えている。
【0004】作業時は車輛を前進し、且つクレビス型の
油圧シリンダ22を延ばしてアーム4をピン13を中心
に回転してスクリード装置5を所要の舗装面となる位置
まで下げ、ホッパー24にアスファルト乳材の合材(以
下合材という)を投入すると図示矢印ロの方向に移動す
るコンベヤ25によりねじ羽根26に送られ、進行方向
に直角方向に配されたねじ羽根26により、左右両側へ
送られ、路盤上に散布され、アスファルトフィニッシャ
ーの進行により中央スクリード15、ワイドナースクリ
ード21で押しならされこれらの下面により加振加熱押
圧される。
【0005】図5はシャーシー枠1の後部を示しねじ羽
根26を表わす平面図である。
【0006】上記においてねじ羽根26は図5に示すよ
うにシャーシー枠1に固定されたチェンケース28と、
シャーシー枠1の後端板1aに固定した支持装置38に
より支持されている。このシャーシー枠1にはチェン伝
導装置27が固定されている。チェン伝導装置27はチ
ェンケース28内に収容され、チェンケース28に回転
自在に支持され、左右夫々独立して駆動される入力軸2
9に固定された夫々のチェンホイル31と、車輪2の車
軸と平行な左右に夫々独立した駆動軸32に夫々固定さ
れたチェンホイル33との間に夫々チェン34が掛けら
れている。入力軸29は内燃機関から回転力を伝達され
るように図示されない動力伝達装置に連結されている。
駆動軸32はチェンケース28に回転自在に支持され、
各ねじ羽根26の一端が駆動軸32に回転力を伝えられ
るように連結されている。チェン伝導装置27の左右に
配置したねじ羽根26はねじれ方向が異なり、図示矢印
ハの方向に合材を送るように回転する際に生じる推力は
ねじ羽根26の軸に嵌合するスラストカラー35をチェ
ンケース28で受けるようになっている。ねじ羽根26
の他端はシャーシー枠1の後端板1aに固定された支持
装置38で回転自在に支持される。支持装置38にはね
じ羽根26と同心の延長ねじ羽根37が脱着可能に固定
されている。
【0007】図6は従来のアスファルトフィニッシャー
の左右方向の中央部位置におけるねじ羽根26の駆動側
支持装置30の縦断面図である。
【0008】チェンケース28の取付穴28aには軸受
ハウジング43が嵌入し、この軸受ハウジング43のフ
ランジを挿通してボルト44がチェンケース28にねじ
込まれている。尚チェンケース28はシャーシー枠1に
固定され、固定部材として見るとシャーシー枠1の一部
と見做すことができる。軸受ハウジング43円筒形の内
周43aには両側シール付の球軸受46の外輪が嵌入
し、球軸受46の内輪は駆動軸32に嵌入し、球軸受4
6の内輪の半径方向にねじ込まれた止めねじ48により
球軸受46は駆動軸32に固定されている。駆動軸32
のチェンケース28内へ突出した一端にはチェンホイル
33が溶接により固定されている。駆動軸32の他端は
耐熱性の軸封部材63を挿通しており、駆動軸32の先
端はねじ羽根26の中空軸部26aに滑合し、ピン51
が中空軸部26a及び駆動軸32の長孔32aをわたり
貫通し、強く該中空軸部26aに打込まれ、長孔32a
では軸方向移動自在に嵌合している。
【0009】軸受ハウジング43には軸封カバー49が
嵌入し、軸封カバー49を挿通したボルト52が軸受ハ
ウジング43にねじ込まれている。軸封カバー49の駆
動軸32が挿通する中心孔49bには軸封部材63が嵌
入する円周方向の溝49aが嵌入し、軸封部材63が該
溝49aに嵌入している。
【0010】
【発明が解決しようとする課題】このような構成のアス
ファルトフィニッシャーを稼動すると1年位で駆動軸3
2、球軸受46、チェンホイル33の著しい摩耗が認め
られる。この球軸受46、チェンホイル33を取り換え
保全を続けたとしても、約4年位で軸受ハウジング4
3、軸封カバー49が合材による摩耗により使用に耐え
られなくなる。
【0011】上記において軸封部材はナフロン含浸ブレ
ードパッキン(日本アスベスト社製)であって、純良な
白石綿糸を入編または袋編方式で断面角形に編組し、P
TFEディスバージョンと微量の特殊潤滑剤を含浸処理
したケミカル用パッキンであって、上記のような駆動
軸、球軸受及びチェンホイルの摩耗状態においても軸封
部材の損耗は殆んど認められない。
【0012】本発明は合材の浸入しないねじ羽根の軸封
装置付軸受装置を備えたアスファルトフィニッシャーの
合材送り用ねじ羽根の駆動側支持装置を提供することを
目的とする。
【0013】
【課題を解決するための手段】コンベヤ25で送られ、
ねじ羽根26で左右へ送られる合材は砂と砂利とピッチ
からなる。ねじ羽根26に生ずる推力はスラストカラー
35が軸封カバー49又はねじ羽根26の中空軸部26
aと摺動し乍ら担持する。従ってねじ羽根26は図5に
おいて矢印ハと反対方向へ力を受ける。支持装置38は
円筒形ジャーナルをブッシュ軸受で支持しており、ねじ
羽根26の矢印ハ方向の軸方向移動は支持装置38の側
面で受けている。摩耗によりスラストカラー35とこの
スラストカラー35と摺動している部材間及びねじ羽根
26の中空軸部26aと支持装置38間に隙間が生ずる
と負荷変動によってねじ羽根26が矢印ハ方向に移動し
スラストカラー35とスラストカラー35と摺動してい
る部材間に小隙間ができて合材が浸入することがある。
この小隙間から、軸封カバー49と駆動軸32との間に
浸入した合材は軸封部材63と駆動軸32の接触面の端
部において駆動軸32を研削し始め、逐次この接触面に
おいて駆動軸32を研削する。合材と軸封部材63とは
相対的に周方向移動がないので軸封部材63は摩耗する
ことが殆んどなく、逆に駆動軸32を摩耗させるラップ
台となっていると考えられる。かくして軸封部材63位
置での駆動軸32の摩耗が進行すると合材は球軸受46
の片側の軸受シールの隙間に侵入し、これらの軸受シー
ル及び球軸受46を摩耗する。そして更に他の片側の軸
受シールの隙間に侵入し、軸受シールを摩耗させ、これ
らの摩耗が大きくなると、チェンホイル33へ合材が侵
入することになる。これによって、チェンホイル33、
チェン34を摩耗させ、引いてはチェンホイル31を摩
耗させる。
【0014】本発明は上記のような考察に基いてなされ
たものであり、かかる本発明の第1の発明は供給された
合材を車輛前部から後方へ給送する合材給送用コンベヤ
と、コンベヤで送られた合材を左右へ配分するねじ羽根
とを有し、コンベヤで送られた合材を左右へ配分するね
じ羽根はアスファルトフィニッシャーの左右方向の中央
部位置で切り離されていて左右のねじ羽根夫々が駆動力
を受けるようにチェンケースに支持されたアスファルト
フィニッシャーの合材送り用ねじ羽根の駆動側支持装置
において、一端をねじ羽根軸に連結し他端にチェンホイ
ルを固定した駆動軸と、この駆動軸を軸承する軸受と、
該軸受を装架しチェンケースに固定された軸受ハウジン
グと、前記軸受とねじ羽根間において軸受ハウジング側
に取り付けられた軸封部材と、を有し、駆動軸には軸封
部材が密に嵌入する周方向の溝を設けられていると共
に、ねじ羽根と駆動軸が軸方向移動自在で回転力を伝え
るように連結されていることを特徴とするアスファルト
フィニッシャーの合材送り用ねじ羽根の駆動側支持装置
である。
【0015】
【0016】
【実施例】以下、本発明の実施例を図面に従って説明す
る。
【0017】図1は従来例の図6に対応しており、図1
において図6と同一部分は同一符号を付し説明を省略す
る。
【0018】図1は図5に示した合材をフローシートフ
ィニッシャーの左右両側へ向って送るねじ羽根26のア
スファルトフィニッシャーの左右方向の中央部位置にお
ける駆動側支持装置を示してある。軸受ハウジング43
の内周43aには球軸受46が嵌入されている。軸受ハ
ウジング43の一部として軸封カバー41が付設されて
いる。
【0019】図示断面で円環状の軸封カバー41の円筒
形凹部41aには軸封部材支持輪42が嵌入し軸封カバ
ー41にねじ込まれた小ねじ45でもって軸封部材支持
輪42を押圧して回り止めとしてある。軸封部材支持輪
42は軸受ハウジング43の内周43aの拡径部43b
にその外周が嵌入していて軸封カバー41を挿通してボ
ルト52を軸受ハウジング43にねじ込むことによって
軸封部材支持輪42は軸方向及び周方向に不動となって
いる。軸封部材支持輪42の軸封カバー41の円筒形凹
部41aの底と接する側面42aには円筒形の凹部状の
円筒形軸封部材収容部42bが設けてある。この収容部
42bには軸封部材47の外周側が嵌合し収容されてい
る。軸封部材47の外周は円筒形軸封部材収容部42b
の内周に密に嵌合する直径であり、軸封部材47の外周
側両側は円筒形軸封部材収容部42bの側面及び軸封カ
バー41の円筒形凹部41aの底面に圧接している。軸
封カバー41の円筒形凹部41aの底及び軸封部材支持
輪42の円筒形軸封部材収容部42bの底面にほぼ一致
させて駆動軸32に断面角形の周方向の条溝62を設け
てある。この条溝62は角形であり、その条溝62には
軸封部材47が摺動するように隙間少なく嵌合してい
る。軸封部材47の幅は条溝62の幅よりわずかに小さ
く、内径は条溝62の溝底の直径よりわずかに大きい。
この軸封部材47の材質、構成は従来例と同様ナフロン
含浸ブレードパッキンである。又、周知の軸封部材形状
と同様周方向の一個所を半径方向又は半径方向に対して
斜め方向に切り目が入れられ切り離し可能となってい
る。或は軸封部材47が弾性を有し元の形に復元するよ
うな材質のものである場合は切り目のない円環であって
もよい。駆動軸32は軸封カバー41及び軸封部材支持
輪42の各中心孔41c,42cとは隙間を有し、ゆる
く挿通している。
【0020】ねじ羽根26の中空軸部26aと駆動軸3
2は滑合しており、ねじ羽根26と駆動軸32は回転力
を伝えるが軸方向には相対移動自在としてある。そのた
めにピン51が駆動軸32の直径をわたって中空軸部2
6aに圧入され、ピン51は駆動軸32の軸方向の長孔
32aに滑合している。
【0021】図2に示すように入力軸29はチェンケー
ス28にボルト29c止めされた軸受ブラケット29b
に嵌入した球軸受29aに嵌入固定されて支持されてい
る。
【0022】軸封部材47の組立分解方法についてのべ
る。この組立分解は軸受ハウジング43をチェンケース
28に取り付けない状態でに行う。駆動軸32に球軸受
46を嵌入してチェンホイル33側へ押し込み、球軸受
46に軸受ハウジング43を嵌入してチェンホイル33
側へ押し込む。次に駆動軸32に軸封部材支持輪42を
挿入し、奥一杯まで移動する。すると球軸受46の外輪
に軸封部材支持輪42が当接した状態となり、駆動軸3
2に設けた周方向の条溝62は図1において軸封部材支
持輪42の右側に来るので、条溝62に軸封部材47を
嵌合する。ここで軸封部材支持輪42を図1において右
行してその円筒形軸封部材収容部42bを軸封部材47
に嵌合する。この際軸封部材47の一個所に設けた切り
目が圧接する状態において軸封部材47は円筒形軸封部
材収容部42bに密に嵌入する。軸受ハウジング43を
右行し、軸受ハウジング43の内周43aの拡径部43
bを軸封部材支持輪42に嵌合する。駆動軸32に右側
から軸封カバー41を挿入し、その円筒形凹部41aを
軸封部材支持輪42に嵌合し、小ねじ45を軸封カバー
41にねじ込み、ボルト52を軸封カバー41を挿通し
て軸受ハウジング43にねじ込む。そして球軸受46を
駆動軸32上で移動して所定位置において球軸受46の
内輪に止めねじ48をねじ込み球軸受46を駆動軸32
に固定する。
【0023】上記のように組立てられたユニットは軸受
ハウジング43をチェンケース28の取付穴28aに嵌
合してボルト44を軸受ハウジング43のフランジを挿
通してチェンケース28にねじ込む。尚、チェン34は
図示されないチェンケースカバーを開いてチェンホイル
31,33間に掛ける。
【0024】ねじ羽根26はその中空軸部26aを駆動
軸32に嵌合し、駆動軸32の長孔32aを挿通してピ
ン51を中空軸部26aに打込んで取り付ける。
【0025】軸封部材47の分解順序は組立の場合と逆
の順序で行う。
【0026】上記構成の作用を説明する。入力軸29が
回転するとチェンホイル31の回転はチェン34を介し
てチェンホイル33に伝えられ、駆動軸32を回転す
る。駆動軸32の回転はピン51を介してねじ羽根26
に伝えられる。合材はコンベヤ25端より離れ軸受ハウ
ジング43と軸受ハウジング43に近いねじ羽根26上
に落下してくる。
【0027】駆動軸32は球軸受46で支持されて回転
し、軸封部材47は静止しており、駆動軸32の条溝6
2と軸封部材47は摺動している。図5に示すように合
材は矢印ハの方向に送られる。従ってねじ羽根26は合
材の送り力の反力を受けて、そのスラストカラー35が
軸封カバー41を圧する。然し乍ら既述したような次第
でスラストカラー35とスラストカラー35と摺動する
部材間はねじ羽根26の移動により隙間を生ずることが
あり、駆動軸32と軸封カバー41の中心孔41c間の
隙間に合材が侵入する。
【0028】ここで軸封部材47は駆動軸32に設けた
条溝62に嵌合しているため、この条溝62の側面と軸
封部材47の側面間へ侵入しようとする合材は駆動軸3
2が回転しているので放射方向の外側へ排除する力を受
ける。そして、条溝62に軸封部材47が嵌合している
のでラビリンス効果も働くので併せて軸封部材47と駆
動軸32間を通じて球軸受46側へ合材は進入しない。
スラストカラー35或はその相手摺動部材に摩耗が生じ
ても上記作用は同じである。
【0029】尚、実施例ではねじ羽根26の端部支持装
置38もアスファルトフィニッシャーの左右方向の中央
位置のねじ羽根の駆動側支持装置30と同様な工夫が施
されている。図7は支持装置38の縦断面図である。ね
じ羽根26、延長ねじ羽根37のある側は共に同様な軸
封が行われており、主としてねじ羽根26側について以
下にのべる。
【0030】ブラケット57はシャーシー枠1に固定さ
れている。軸受ハウジング53の円筒形の内周53aに
は軸受56が圧入されている。この軸受56は鋳鉄製或
はニードル軸受である。軸受56の外側端面56aと一
致する片側を一致させてジャーナル71に断面角形の周
方向の条溝72を設けてある。この条溝72は角形であ
り、その条溝72には軸封部材73が摺動するように隙
間少なく嵌合している。軸封部材73の幅は条溝72の
幅よりわずかに小さく、内径は条溝72の溝底の直径よ
りわずかに大きく、外径は軸受ハウジング53の内周5
3aに密に嵌合する直径である。この軸封部材73の材
質、構成は従来例と同様ナフロン含浸ブレードパッキン
であり、周方向の一個所に半径方向又は半径方向に対し
て斜め方向に切り目が設けてある。
【0031】ねじ羽根26の中空軸部26aとジャーナ
ル71は滑合しており、ねじ羽根26とジャーナル71
は回転力を伝えるが軸方向には相対移動自在としてあ
る。そのためにピン61がジャーナル71の直径をわた
ってねじ羽根26の中空軸部26aに圧入され、ピン6
1はジャーナル71の軸方向の長孔71aに滑合してい
る。軸受ハウジング53の両端の円筒形嵌合部53bに
嵌合する軸封カバー59と軸受56でもって軸封部材7
3を挟持している。軸封カバー59の端面にはねじ羽根
26の中空軸部26a端面が摺擦するようになってお
り、アスファルトフィニッシャーの左右方向の中央部位
置のねじ羽根の駆動側支持装置30のスラストカラー3
5と併せてねじ羽根26は軸方向に移動しないようにな
っている。しかし、合材に含まれる砂等により、ねじ羽
根26の中空軸部26a端面と軸封カバー59の接触
面、又は、スラストカラー35とねじ羽根26の中空軸
部26a端面との摺動面は摩耗するから、ねじ羽根26
は軸方向に移動するようになるが、駆動軸32には長孔
32aが設けられ、ジャーナル71には長孔71aを設
けられているので駆動軸32、ジャーナル71は推力を
受けることがない。
【0032】延長ねじ羽根37はその中空軸部37aが
ジャーナル71に嵌合し、これらの直径をわたるピン3
9により連結されている。
【0033】この支持装置38はジャーナル71の条溝
72に軸封部材73が嵌合しているので軸受56とジャ
ーナル71間へ合材は侵入せず、軸受ハウジング53に
固定した中空のブラケット57にねじ込んだキャップ5
4に固着したグリースニップル55からのグリースの給
油はブラケット57から軸受ハウジング53の給油口5
3cをとおり軸受56間の環状空間53dに達するが軸
封部材73位置においてジャーナル71は摩耗しないの
で給油量は少なくてすむ(従来例では毎日グリースのカ
ートリッジ数本が必要)。
【0034】
【発明の効果】本発明はアスファルトフィニッシャーの
合材を左右へ振り分けて送るねじ羽根のアスファルトフ
ィニッシャーの左右方向の中央部位置を支持する駆動側
支持装置に設けた駆動軸に、軸封部分において軸封部分
が嵌合して摺動する周方向の溝を設けねじ羽根と駆動軸
が軸方向移動自在で回転力を伝えるように連結したた
め、軸封部材と駆動軸との摺動部へ合材が侵入し難くな
り、この摺動部における駆動軸の摩耗が少なくなり、従
来、軸封部における駆動軸の摩耗→軸受摩耗→チェン駆
動部材の摩耗が見られなくなった。例えば従来例が1年
位でチェンケース内へ合材が侵入するのが軸封部の軸封
ケース摩耗により軸封ケースが使用出来なくなる4年を
経過しても、上記摩耗が殆んど見られず耐久力が著しく
向上したことが認められる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a drive-side supporting device for a screw blade for feeding a mixture of an asphalt finisher used for pavement on a road. 2. Description of the Related Art FIGS. 3 and 4 are a plan view and a side view of an asphalt finisher. The chassis frame 1 is supported by four wheels 2 and travels in the direction of arrow A with an internal combustion engine (not shown) mounted. A screed device 5 is provided at the end of the arm 4 whose base is connected to the chassis frame 1 with a pin 13. The ends of the arms 4 on both sides are connected by a horizontal member, and a fixed shaft 7 is provided between the two arms. A central screed frame 8 is rotatably supported on the fixed shaft 7.
Both ends of a nut 9 are pivotally attached to the upper end of the center screed frame 8, and a screed angle adjusting screw 11 is screwed into the nut 9. The adjusting screw 11 is supported by a bearing 14 swingably supported on a shaft 12 extending between the arms 4 so as not to move in the axial direction. An operation handle 10 is fixed to the screed angle adjusting screw 11. Central screed 15 is provided on the frame members extending right and left of central screed frame 8.
Has been fixed. At the front end of the central screed 15 in the traveling direction, the supplied mixture is pressed and the central screed 15 is pressed.
A central screed push plate 15a for feeding a mixture is provided between the lower surface and the roadbed. A widener support frame 16 is fixed to the central screed frame 8. A widener frame 17 is attached to the widener support frame 16 so as to be able to expand and contract in both left and right directions. A circular hole is provided in the widener support frame 16 as a guide in the horizontal direction, and a guide bar 18 of a guide member is fitted in the circular hole so as to freely slide in and out. 17
Has been fixed. The piston rod 1 of the hydraulic cylinder provided in the widener support frame 16 is mounted on the widener frame 17.
9 is fixed. The widener frame 17 is provided with a widener screed push plate 21a for feeding the mixture between the ironing portion of the widener screed 21 and the roadbed while pushing the mixture similarly to the central screed 15,
The push plate 21a is supported on the widener support frame 16 so as to be able to freely enter and exit. The center screed 15 is located forward of the widener screed 21 in the traveling direction of the vehicle, and both ends overlap. The lower surfaces of the widener screed 21 and the central screed 15 are on the same plane. As shown in FIG. 4, a vertical clevis type hydraulic cylinder 22 pivotally attached to both ends of the chassis frame 1 and the arm 4 rotates the arm 4 about the pin 13 to move the screed device 5 up and down. . The screed device 5 includes a vibrating device for the screeds 15 and 21 (not shown). In operation, the vehicle is advanced, the clevis type hydraulic cylinder 22 is extended, and the arm 4 is rotated about the pin 13 to lower the screed device 5 to a required paving surface. When a dairy mixture (hereinafter referred to as a mixture) is supplied, the dairy mixture is sent to the screw blades 26 by the conveyor 25 moving in the direction of arrow B in the figure, and is sent to the left and right sides by the screw blades 26 arranged at right angles to the traveling direction. The screed is spread on the roadbed, is pushed by the central screed 15 and the widener screed 21 by the advance of the asphalt finisher, and is heated and pressed by the lower surfaces thereof. FIG. 5 is a plan view showing the rear part of the chassis frame 1 and showing the screw blades 26. In the above description, the screw blade 26 includes a chain case 28 fixed to the chassis frame 1 as shown in FIG.
The chassis frame 1 is supported by a support device 38 fixed to the rear end plate 1a. A chain transmission device 27 is fixed to the chassis frame 1. The chain transmission device 27 is housed in a chain case 28, is rotatably supported by the chain case 28, and is driven independently of the left and right input shafts 2.
A chain 34 is hung between each of the chain wheels 31 fixed to 9 and a chain wheel 33 fixed to a drive shaft 32 that is independent on the left and right sides parallel to the axle of the wheels 2. The input shaft 29 is connected to a power transmission device (not shown) so as to transmit torque from the internal combustion engine.
The drive shaft 32 is rotatably supported by the chain case 28,
One end of each screw blade 26 is connected so as to transmit a rotational force to the drive shaft 32. The screw blades 26 arranged on the left and right sides of the chain transmission device 27 have different twisting directions, and the thrust generated when rotating so as to feed the mixture in the direction of arrow C in FIG. The chain case 28 receives it. Screw blade 26
Is rotatably supported by a support device 38 fixed to the rear end plate 1a of the chassis frame 1. An extended screw blade 37 concentric with the screw blade 26 is detachably fixed to the support device 38. FIG. 6 is a longitudinal sectional view of a driving-side support device 30 for the screw blade 26 at a central position in the left-right direction of a conventional asphalt finisher. A bearing housing 43 is fitted in the mounting hole 28a of the chain case 28, and a bolt 44 is screwed into the chain case 28 through a flange of the bearing housing 43. The chain case 28 is fixed to the chassis frame 1 and can be regarded as a part of the chassis frame 1 when viewed as a fixing member. The outer ring of a ball bearing 46 with seals on both sides is fitted in the cylindrical inner periphery 43a of the bearing housing 43, and the inner ring of the ball bearing 46 is fitted in the drive shaft 32, and the ball bearing 4
The ball bearing 46 is fixed to the drive shaft 32 by a set screw 48 screwed in the radial direction of the inner ring 6. Drive shaft 32
A chain wheel 33 is fixed to one end protruding into the chain case 28 by welding. The other end of the drive shaft 32 passes through a heat-resistant shaft sealing member 63, and the tip of the drive shaft 32 slides into the hollow shaft portion 26 a of the screw blade 26, and
Penetrates through the long hole 32a of the hollow shaft portion 26a and the drive shaft 32, and is strongly driven into the hollow shaft portion 26a to form the long hole 32a.
Are fitted so as to be movable in the axial direction. A shaft sealing cover 49 is fitted into the bearing housing 43, and a bolt 52 inserted through the shaft sealing cover 49 is screwed into the bearing housing 43. A circumferential groove 49a in which the shaft sealing member 63 is fitted is fitted in a center hole 49b of the shaft sealing cover 49 through which the drive shaft 32 is inserted, and the shaft sealing member 63 is fitted in the groove 49a. [0010] When the asphalt finisher having such a configuration is operated, the drive shaft 3 is driven in about one year.
2. Remarkable wear of the ball bearing 46 and the chain wheel 33 is observed. Even if the ball bearing 46 and the chain wheel 33 are replaced and maintenance is continued, it takes about four years for the bearing housing 4.
3. The shaft seal cover 49 cannot be used due to wear caused by the mixture. In the above, the shaft sealing member is a naflon-impregnated blade packing (manufactured by Nippon Asbestos Co., Ltd.).
This is a chemical packing impregnated with a TFE diversion and a small amount of a special lubricant, and hardly any wear of the shaft sealing member is recognized even in the above-described abrasion state of the drive shaft, the ball bearing and the chain wheel. SUMMARY OF THE INVENTION It is an object of the present invention to provide a drive-side support device for a screw blade for feeding a mixture in an asphalt finisher provided with a bearing device with a shaft sealing device for a screw blade in which the mixture does not enter. Means for Solving the Problems Sent by a conveyor 25,
The mixture sent to the left and right by the screw blade 26 is composed of sand, gravel and pitch. The thrust generated on the screw blade 26 is determined by the thrust collar 35 when the shaft seal cover 49 or the hollow shaft portion 26 of the screw blade 26 is mounted.
a while sliding. Accordingly, the screw blade 26 receives a force in the direction opposite to the arrow C in FIG. The support device 38 supports the cylindrical journal with a bush bearing, and the axial movement of the screw blade 26 in the direction of arrow C is received on the side surface of the support device 38. When a gap is formed between the thrust collar 35 and members sliding with the thrust collar 35 and between the hollow shaft portion 26a of the screw blade 26 and the support device 38 due to wear, the screw blade 26 moves in the direction of arrow C due to load fluctuation. A small gap may be formed between the thrust collar 35 and the member sliding with the thrust collar 35, so that the mixture may enter.
From this small gap, the mixture that has entered between the shaft seal cover 49 and the drive shaft 32 starts to grind the drive shaft 32 at the end of the contact surface between the shaft seal member 63 and the drive shaft 32, and sequentially in this contact surface. The drive shaft 32 is ground. Since the mixture and the shaft sealing member 63 do not relatively move in the circumferential direction, the shaft sealing member 63 hardly wears, and conversely, it is considered that the shaft sealing member 63 is a lap table that wears the drive shaft 32. As the wear of the drive shaft 32 progresses at the position of the shaft sealing member 63, the mixture becomes a ball bearing 46.
Of the bearing seals on one side of the bearing, and wears these bearing seals and the ball bearing 46. Then, it enters the gap between the other one of the bearing seals and wears the bearing seals. When the wear of these bearings increases, the mixture enters the chain wheel 33. Thereby, the chain wheel 33,
The chain 34 is worn and the chain wheel 31 is worn. The present invention has been made based on the above considerations, and the first invention of the present invention is a composite material feeding conveyor for feeding the supplied composite material from the front to the rear of the vehicle. And, there is a screw blade that distributes the mixture sent by the conveyor to the left and right, and the screw blade that distributes the mixture sent by the conveyor to the left and right is separated at the center position in the left and right direction of the asphalt finisher. In the drive side support device for the screw blade for feeding the mixture of the asphalt finisher supported by the chain case so that each of the left and right screw blades receives the driving force, one end was connected to the screw blade shaft and the chain wheel was fixed to the other end. A drive shaft, a bearing for bearing the drive shaft,
A bearing housing mounted with the bearing and fixed to a chain case; and a shaft sealing member mounted on the bearing housing side between the bearing and the screw blade, wherein the shaft sealing member is closely fitted to the drive shaft. co When provided a circumferential groove
, The screw blade and drive shaft can move freely in the axial direction and transmit torque.
A driving side support device for a screw blade for feeding a mixture material of an asphalt finisher, which is connected in such a manner as to be described above. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 corresponds to FIG. 6 of the conventional example.
In FIG. 6, the same parts as those in FIG. FIG. 1 shows a drive-side support device at a central position in the left-right direction of the asphalt finisher of the screw blade 26 for feeding the mixture shown in FIG. 5 toward the left and right sides of the flow sheet finisher. Bearing housing 43
A ball bearing 46 is fitted into the inner periphery 43a of the rim. The shaft seal cover 41 is attached as a part of the bearing housing 43. A shaft-sealing member support ring 42 is fitted into the cylindrical recess 41a of the ring-shaped shaft-sealing cover 41 having an annular cross section in the drawing, and the shaft-sealing member supporting wheel 42 is pressed by a small screw 45 screwed into the shaft-sealing cover 41. And as a detent. The shaft sealing member support wheel 42 is provided with an enlarged diameter portion 43 b of an inner circumference 43 a of the bearing housing 43.
When the bolt 52 is screwed into the bearing housing 43 by passing the shaft sealing cover 41 through the shaft sealing member 41, the shaft sealing member support wheel 42 is immovable in the axial direction and the circumferential direction. On the side surface 42a of the shaft sealing member support ring 42, which is in contact with the bottom of the cylindrical recess 41a of the shaft sealing cover 41, a cylindrical shaft sealing member accommodating portion 42b having a cylindrical concave shape is provided. The outer peripheral side of the shaft sealing member 47 is fitted and housed in the housing portion 42b. The outer periphery of the shaft sealing member 47 is a cylindrical shaft sealing member accommodation portion 42b.
The outer peripheral side of the shaft sealing member 47 is in pressure contact with the side surface of the cylindrical shaft sealing member accommodating portion 42b and the bottom surface of the cylindrical concave portion 41a of the shaft sealing cover 41. The drive shaft 32 is provided with a circumferential groove 62 having a rectangular cross section in the drive shaft 32 so as to substantially coincide with the bottom of the cylindrical concave portion 41a of the shaft seal cover 41 and the bottom surface of the cylindrical shaft seal member accommodating portion 42b of the shaft seal member support ring 42. is there. The groove 62 has a rectangular shape, and the shaft sealing member 47 is fitted into the groove 62 with a small gap so as to slide. The width of the shaft sealing member 47 is slightly smaller than the width of the groove 62, and the inner diameter is slightly larger than the diameter of the groove bottom of the groove 62.
The material and configuration of the shaft sealing member 47 is a naflon-impregnated blade packing as in the conventional example. Further, similarly to the well-known shaft sealing member shape, a circumferential portion is cut in a radial direction or an oblique direction with respect to the radial direction, and can be separated. Alternatively, in the case where the shaft sealing member 47 is made of a material having elasticity and restoring the original shape, the ring may be a continuous ring. The drive shaft 32 has a gap with each of the center holes 41c and 42c of the shaft seal cover 41 and the shaft seal member support wheel 42, and is loosely inserted. The hollow shaft 26a of the screw blade 26 and the drive shaft 3
Numeral 2 indicates that the screw blade 26 and the drive shaft 32 transmit rotational force but are relatively movable in the axial direction. For this purpose, the pin 51 extends across the diameter of the drive shaft 32 and
6a, the pin 51 is in sliding contact with the axially long hole 32a of the drive shaft 32. As shown in FIG. 2, an input shaft 29 has a bearing bracket 29b fixed to a chain case 28 by bolts 29c.
And is fixedly supported by a ball bearing 29a fitted in the ball bearing. The method of assembling and disassembling the shaft sealing member 47 will be described. This disassembly and disassembly are performed in a state where the bearing housing 43 is not attached to the chain case 28. The ball bearing 46 is fitted into the drive shaft 32 and pushed toward the chain wheel 33, and the bearing housing 43 is fitted into the ball bearing 46 to form the chain wheel 33.
Push it to the side. Next, the shaft sealing member support wheel 42 is inserted into the drive shaft 32, and moves to the back. Then, the shaft sealing member supporting wheel 42 comes into contact with the outer ring of the ball bearing 46, and the drive shaft 3
Since the circumferential groove 62 provided in 2 comes to the right of the shaft sealing member support ring 42 in FIG. 1, the shaft sealing member 47 is fitted into the groove 62. Here, the shaft sealing member support wheel 42 is moved rightward in FIG.
Fits. At this time, the shaft sealing member 47 is tightly fitted into the cylindrical shaft sealing member accommodating portion 42b in a state where the cut provided at one position of the shaft sealing member 47 is in pressure contact. The bearing housing 43 moves rightward and the enlarged diameter portion 43 of the inner periphery 43 a of the bearing housing 43 is moved.
b is fitted to the shaft sealing member support wheel 42. The shaft seal cover 41 is inserted into the drive shaft 32 from the right side, the cylindrical recess 41a is fitted to the shaft seal member support wheel 42, the small screw 45 is screwed into the shaft seal cover 41, and the bolt 52 is screwed into the shaft seal cover 41. It is inserted and screwed into the bearing housing 43. Then, the ball bearing 46 is moved on the drive shaft 32, and a set screw 48 is screwed into the inner ring of the ball bearing 46 at a predetermined position, and the ball bearing 46 is moved to the drive shaft 32.
Fixed to. In the unit assembled as described above, the bearing housing 43 is fitted into the mounting hole 28a of the chain case 28, and the bolt 44 is screwed into the chain case 28 through the flange of the bearing housing 43. The chain 34 is opened between a chain wheel 31 and 33 by opening a chain case cover (not shown). The screw blade 26 has its hollow shaft portion 26a fitted to the drive shaft 32, and the pin 51 is inserted into the long hole 32a of the drive shaft 32 and driven into the hollow shaft portion 26a. The disassembling order of the shaft sealing member 47 is performed in the reverse order of the assembly. The operation of the above configuration will be described. When the input shaft 29 rotates, the rotation of the chain wheel 31 is transmitted to the chain wheel 33 via the chain 34 and rotates the drive shaft 32. The rotation of the drive shaft 32 is carried out via the pin 51 through the screw blade 26.
Conveyed to. The mixture is separated from the end of the conveyor 25 and falls onto the bearing housing 43 and the screw blade 26 near the bearing housing 43. The drive shaft 32 rotates while being supported by a ball bearing 46, and the shaft sealing member 47 is stationary.
2 and the shaft sealing member 47 are sliding. As shown in FIG. 5, the mixture is sent in the direction of arrow C. Therefore, the screw blade 26 receives the reaction force of the feed force of the mixture, and the thrust collar 35 presses the shaft sealing cover 41. However, as described above, a gap may be formed between the thrust collar 35 and the member that slides on the thrust collar 35 due to the movement of the screw blade 26, and the gap between the drive shaft 32 and the center hole 41c of the shaft seal cover 41 may be formed. Mixtures penetrate into. Since the shaft sealing member 47 is fitted in the groove 62 provided on the drive shaft 32, the composite material which is to enter between the side surface of the groove 62 and the side surface of the shaft sealing member 47 is driven. Axis 3
Since 2 is rotating, it receives a force that displaces it outward in the radial direction. Since the shaft sealing member 47 is fitted in the groove 62, a labyrinth effect also works, so that the mixture does not enter the ball bearing 46 through the space between the shaft sealing member 47 and the drive shaft 32.
The above operation is the same even if the thrust collar 35 or its sliding member is worn. In the embodiment, the end supporting device 38 of the screw blade 26 is also devised in the same manner as the driving support device 30 for the screw blade at the center position in the left-right direction of the asphalt finisher. FIG. 7 is a longitudinal sectional view of the support device 38. The same shaft sealing is performed on both sides where the screw blade 26 and the extended screw blade 37 are provided, and the following mainly describes the screw blade 26 side. The bracket 57 is fixed to the chassis frame 1. A bearing 56 is press-fitted into a cylindrical inner periphery 53a of the bearing housing 53. The bearing 56 is a cast iron or needle bearing. A journal 71 is provided with a circumferential groove 72 having a rectangular cross section, with one side corresponding to the outer end surface 56a of the bearing 56 being aligned. The groove 72 has a square shape, and the shaft sealing member 73 is fitted into the groove 72 with a small gap so as to slide. The width of the shaft sealing member 73 is slightly smaller than the width of the groove 72, the inner diameter is slightly larger than the diameter of the groove bottom of the groove 72, and the outer diameter is the inner circumference 5 of the bearing housing 53.
3a. The material and configuration of the shaft sealing member 73 is a naflon-impregnated blade packing as in the conventional example, and a cut is provided at one location in the circumferential direction in the radial direction or in a direction oblique to the radial direction. The hollow shaft portion 26a of the screw blade 26 and the journal 71 are in sliding contact with each other.
Transmits rotational force but is relatively movable in the axial direction. For this purpose, the pin 61 is pressed into the hollow shaft portion 26a of the screw blade 26 across the diameter of the journal 71,
Reference numeral 1 is fitted in the axially long hole 71a of the journal 71. The shaft sealing member 59 includes the shaft sealing cover 59 and the bearing 56 which are fitted into the cylindrical fitting portions 53b at both ends of the bearing housing 53.
3 is sandwiched. The end face of the shaft seal cover 59 is rubbed against the end face of the hollow shaft portion 26a of the screw blade 26, and the thrust collar 3 of the screw blade drive-side support device 30 at the center of the asphalt finisher in the left-right direction.
In conjunction with 5, the screw blade 26 is prevented from moving in the axial direction. However, due to sand or the like contained in the mixture, the contact surface between the hollow shaft portion 26a of the screw blade 26 and the shaft sealing cover 59 or the sliding surface between the thrust collar 35 and the hollow shaft portion 26a end surface of the screw blade 26 is reduced. Since it is worn, the screw blade 26
Move in the axial direction, but the drive shaft 32 and the journal 71 are provided with the long hole 32a and the long hole 71a, so that the drive shaft 32 and the journal 71 do not receive thrust. The extension screw blade 37 has a hollow shaft portion 37a fitted to the journal 71, and a pin 3 extending over these diameters.
9 are connected. Since the shaft sealing member 73 is fitted in the groove 72 of the journal 71, the mixture does not enter between the bearing 56 and the journal 71, and the hollow bracket 57 fixed to the bearing housing 53. 5 screwed into
The lubrication of the grease from the grease nipple 55 fixed to the lubrication 4
Although it reaches the annular space 53d between the bearings 56 through 3c, the journal 71 does not wear at the position of the shaft sealing member 73, so the amount of lubrication is small (in the conventional example, several grease cartridges are required every day). According to the present invention, a drive shaft provided on a drive-side support device for supporting a center portion of an asphalt finisher in the left-right direction of a screw blade for feeding a mixture of an asphalt finisher to the left and right is provided. Provide a circumferential groove in which the shaft sealing part fits and slides in the screw blade and drive shaft
Are connected so as to be movable in the axial direction and transmit the rotational force, so that it is difficult for the mixture to enter the sliding portion between the shaft sealing member and the drive shaft, and the drive shaft in the sliding portion Wear has been reduced, and conventionally, wear of the drive shaft in the shaft sealing portion → bearing wear → wear of the chain drive member has not been observed. For example, in the conventional example, the mixture entered the chain case in about one year, but even after four years when the shaft seal case became unusable due to the wear of the shaft seal case of the shaft seal portion, the wear was hardly observed. It was recognized that the durability was significantly improved.
【図面の簡単な説明】
【図1】本発明の実施例の縦断面図である。
【図2】チェン伝導装置の水平断面図である。
【図3】アスファルトフィニッシャーの平面図である。
【図4】図3の側面図である。
【図5】合材を左右へ送る送り装置を示す平面図であ
る。
【図6】従来例の縦断面図である。
【図7】ねじ羽根の端部の支持装置の縦断面図である。
【符号の説明】
25 コンベヤ
26 ねじ羽根
27 チェン伝導装置
28 チェンケース
29 入力軸
30 駆動側支持装置
31 チェンホイル
32 駆動軸
33 チェンホイル
34 チェン
35 スラストカラー
41 軸封カバー
42 軸封部材支持輪
43 軸受ハウジング
45 小ねじ
46 球軸受
47 軸封部材
62 条溝BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an embodiment of the present invention. FIG. 2 is a horizontal sectional view of the chain transmission device. FIG. 3 is a plan view of an asphalt finisher. FIG. 4 is a side view of FIG. 3; FIG. 5 is a plan view showing a feeder for feeding the mixture to the left and right. FIG. 6 is a longitudinal sectional view of a conventional example. FIG. 7 is a longitudinal sectional view of a support device for an end of a screw blade. [Description of Signs] 25 Conveyor 26 Screw blade 27 Chain transmission device 28 Chain case 29 Input shaft 30 Drive side support device 31 Chain wheel 32 Drive shaft 33 Chain wheel 34 Chain 35 Thrust collar 41 Shaft seal cover 42 Shaft sealing member support wheel 43 Bearing housing 45 Machine screw 46 Ball bearing 47 Shaft sealing member 62 Groove
Claims (1)
送する合材給送用コンベヤと、コンベヤで送られた合材
を左右へ配分するねじ羽根とを有し、コンベヤで送られ
た合材を左右へ配分するねじ羽根はアスファルトフィニ
ッシャーの左右方向の中央部位置で切り離されていて左
右のねじ羽根夫々が駆動力を受けるようにチェンケース
に支持されたアスファルトフィニッシャーの合材送り用
ねじ羽根の駆動側支持装置において、一端をねじ羽根軸
に連結し他端にチェンホイルを固定した駆動軸と、この
駆動軸を軸承する軸受と、該軸受を装架しチェンケース
に固定された軸受ハウジングと、前記軸受とねじ羽根間
において軸受ハウジング側に取り付けられた軸封部材
と、を有し、駆動軸には軸封部材が密に嵌入する周方向
の溝を設けられていると共に、ねじ羽根と駆動軸が軸方
向移動自在で回転力を伝えるように連結されていること
を特徴とするアスファルトフィニッシャーの合材送り用
ねじ羽根の駆動側支持装置。(57) [Claims 1] A composite material feeding conveyor for feeding the supplied composite material from the front to the rear of the vehicle, and a screw for distributing the composite material sent by the conveyor to the left and right. Screw blades that have blades and distribute the mixture sent by the conveyor to the left and right are cut off at the center position in the left and right direction of the asphalt finisher, and are mounted on the chain case so that each of the left and right screw blades receives driving force. In a driving side support device for a screw blade for feeding a mixture of a supported asphalt finisher, a drive shaft having one end connected to the screw blade shaft and a chain wheel fixed to the other end, a bearing for bearing the drive shaft, and the bearing A bearing housing fixed to the chain case and a shaft sealing member mounted on the bearing housing side between the bearing and the screw blade, wherein a periphery of the drive shaft in which the shaft sealing member is tightly fitted. One Grooves with is provided to the, screw blade and the drive shaft axial direction
A drive-side support device for a screw blade for feeding a mixture in an asphalt finisher, which is connected so as to be movable in a direction and transmit a rotational force .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18629894A JP3382366B2 (en) | 1994-07-15 | 1994-07-15 | Driving side support device for screw blade for asphalt finisher |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18629894A JP3382366B2 (en) | 1994-07-15 | 1994-07-15 | Driving side support device for screw blade for asphalt finisher |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0827722A JPH0827722A (en) | 1996-01-30 |
JP3382366B2 true JP3382366B2 (en) | 2003-03-04 |
Family
ID=16185878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18629894A Expired - Fee Related JP3382366B2 (en) | 1994-07-15 | 1994-07-15 | Driving side support device for screw blade for asphalt finisher |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3382366B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2769939B1 (en) | 2013-02-22 | 2015-04-08 | Joseph Vögele AG | Screw conveyor for a material conveying system of construction machine |
US9334896B2 (en) | 2013-02-22 | 2016-05-10 | Joseph Voegele Ag | Drive shaft module for a construction machine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103711060B (en) * | 2014-01-17 | 2015-11-18 | 戴纳派克(中国)压实摊铺设备有限公司 | Helical axis, spiral distributor and paver thereof |
EP3757290B1 (en) * | 2019-06-26 | 2021-06-02 | Joseph Vögele AG | Longitudinal distribution assembly for a paver |
-
1994
- 1994-07-15 JP JP18629894A patent/JP3382366B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2769939B1 (en) | 2013-02-22 | 2015-04-08 | Joseph Vögele AG | Screw conveyor for a material conveying system of construction machine |
US9334123B2 (en) | 2013-02-22 | 2016-05-10 | Joseph Voegele Ag | Conveyor screw for a material conveyor system of a construction machine |
US9334896B2 (en) | 2013-02-22 | 2016-05-10 | Joseph Voegele Ag | Drive shaft module for a construction machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0827722A (en) | 1996-01-30 |
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