JPS60231026A - Wheel clutch for walking type working vehicle - Google Patents

Abstract

PURPOSE:To make a selecting operation simple in a wheel clutch, by setting an elastic restoring force of a first spring provided between a first clutch ring and a rotating member on a prime mover side to be smaller than that of a second spring provided between the first clutch ring and a second clutch ring. CONSTITUTION:A first clutch ring 27 for a rotating member 21 on a prime mover side is mounted to a first wheel driving shaft 17, while a second clutch ring 28 is mounted to a second wheel driving shaft 18. An elastic restoring force of a first spring provided between the first clutch ring 27 and the rotating member 21 is set to be smaller than that of a second spring provided between the first clutch ring 27 and the second clutch ring 28. As a result, it is possible to simply carry out a selecting operation between an integrally driven condition and an independently idle condition of right and left wheels.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 ゛　本発明は、歩行型作業車一般において、左右一対の
走行用車輪を同一回転方向に一体駆動される状態と、一
方のみが駆動停止される状態と、各別回転自在な遊転状
態とに切換える車輪用クラッチに関する。[Detailed Description of the Invention] [Field of Industrial Application] ゛ The present invention is applicable to general walk-behind working vehicles, in which a pair of left and right running wheels are integrally driven in the same rotational direction, and a state in which only one of the wheels is driven in the same rotational direction. The present invention relates to a wheel clutch that can be switched between an idle state and an idle state in which each rotation is freely possible.

〔従来技術〕[Prior art]

例えば歩行型芝刈り機を、機体を自走させながら作業し
たり、機体を手押し移動させながら作業することが可能
に構成する場合のように、機体の自走や人為移動を可能
に構成するに当り、機体自走時において、一方の車輪の
みを駆動停止できるようにすると、片側車輪の駆動によ
り機体操向が容易にできることになり、人為移動時にお
いて、左右車輪が各別回転可能な遊転状急になるように
すると、左右車輪の各別回転による差動により機体操向
が楽にできることになるのである。　このようなりラッ
チとして、従来、左右車輪を各別に駆動停止できるよう
に構成された操向用クラッチがあった。　つまり、左右
車輪が共に駆動停止される状態に操作することにより、
左右車輪が各別回転自在な遊転状態になるのである。　
又、このクラッチは、左右車輪の駆動及び駆動停止操作
を一対の操作具によって行うようになっていた。For example, when configuring a walk-behind lawnmower so that it can be operated by itself or by being pushed by hand, it is possible to configure the machine to be self-propelled or manually moved. However, if only one wheel can be driven and stopped when the aircraft is self-propelled, the orientation of the aircraft can be easily controlled by driving one wheel, and when the aircraft is moving by itself, the left and right wheels can rotate independently. By increasing the speed, the aircraft direction can be easily controlled by differential rotation of the left and right wheels. As such a latch, there has conventionally been a steering clutch configured to be able to separately drive and stop the left and right wheels. In other words, by operating the left and right wheels so that both wheels are stopped,
The left and right wheels are in an idle state where they can rotate independently.
Further, this clutch is configured to drive and stop the left and right wheels using a pair of operating tools.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来クラッチにあっては、左右車輪を一体駆動状態と各
別遊転状態に切換えるのに、一対の操作具のいずれをも
操作する必要があり、操作面で不利になっていた。With conventional clutches, it is necessary to operate both of a pair of operating tools in order to switch the left and right wheels between the integral driving state and the separate free running state, which is disadvantageous in terms of operation.

本発明の目的は、左右車輪を一体駆動される状態、一方
のみが駆動される状態、及び、各別回転する遊転状急に
切換えるこきが操作簡単にできるように、しかも、その
ための操作系が構造簡単に得られるようにすることにあ
る。It is an object of the present invention to provide an operation system that allows the left and right wheels to be driven integrally, only one of them to be driven, and to suddenly switch between the left and right wheels when they are rotated independently, and also to provide an operating system for this purpose. The purpose is to make the structure easily obtainable.

Ｌ問題を解決するための手段］ 本発明による歩行型作業車の車輪用クラッチが特徴とす
るところは、左右一対の走行用車輪に各別に連動させた
第１車輪駆動軸と第２車輪駆動軸を同芯状に配置し、原
動側回転体を前記第１車輪駆動軸に相対回転自在に取付
け、前記原動側回転体に対する第１クラッチ輪休を、前
記原動側回転体に接近した入り位置と前記原動側回転体
から離間した切り位置と（摺動自在な状態で前記第／１
ｍ駆動軸に一体回転自在に取付け、前記第１クラッチ輪
休に対する第２クラッチ輪休を、前記第１クラッチ輪休
の前記原動側回転体側とは反対側に配置した状態で、か
つ、前記４ｔＪｌクラッチ輪休に接近した入り位置と前
記第２クラツチ斡休から離間した切り位置とに摺動自在
な状態で前記第２車輪駆動軸に一体回転自任に取付け、
前記第１クラッチ輪休を前記原動側回転体から離間操作
する第１スプリングを設けると共に、前記第１クラッチ
輪休と前記第コクラッチ輪体の間に第１スプリングを設
け、前記第２クラッチ輪休に対してこれを摺動操作する
ように１個の操作具を連動させ、前記第１クラツチ袖休
と前記原動側回転体の接合状態における前記第１スプリ
ングの弾性復元力を、前記両りラッチ輪体の接合状急に
おける前記第２スプリングの弾性復元力より小に設定し
であることＫあり、その作用及び効果は次のとおりであ
る。Means for Solving the L Problem] The wheel clutch for a walk-behind work vehicle according to the present invention is characterized by a first wheel drive shaft and a second wheel drive shaft that are respectively linked to a pair of left and right traveling wheels. are arranged concentrically, and the driving-side rotating body is attached to the first wheel drive shaft so as to be relatively rotatable, and the first clutch wheel rest for the driving-side rotating body is set at an engaged position close to the driving-side rotating body and a position close to the driving-side rotating body. The cutting position is spaced apart from the driving side rotary body (the above-mentioned /1
M is attached to the drive shaft so as to be integrally rotatable, and a second clutch wheel rest with respect to the first clutch wheel rest is arranged on the opposite side of the first clutch wheel rest to the driving side rotating body side, and the 4tJl clutch wheel rest attached to the second wheel drive shaft so as to be able to freely rotate integrally with the second clutch in a slidable state between an engaged position close to the clutch and a disengaged position spaced apart from the second clutch rest;
A first spring is provided for separating the first clutch wheel rest from the driving-side rotating body, and a first spring is provided between the first clutch wheel rest and the co-clutch wheel body, and a first spring is provided between the first clutch wheel rest and the co-clutch wheel body, and the second clutch wheel rest A single operation tool is interlocked so as to slide this, and the elastic restoring force of the first spring in the state where the first clutch arm rest and the driving side rotating body are connected is applied to the both latch wheels. The elastic restoring force of the second spring is set to be smaller than the elastic restoring force of the second spring in the joint state, and its operation and effects are as follows.

〔作　用〕[For production]

操作具をクラッチ入り位置の側に操作するに伴い、第２
クラッチ輪休が第１クラッチ輪休の方に摺動され、この
摺動力が第２スプリングにより伝達されて第１クラッチ
輪休が原動側回転体の方に摺動されることと、第１スプ
リングと第１スプリングの前記弾性復元力差、！：によ
り、先ず第１クラッチ輪休が原動側回転体に接合して第
を車輪駆動軸のみが原動側回転体に連動連結される。　
この位置から操作具をさらにクラッチ入り位置に操作す
るに伴い、第コクラッチ輪体が第２スプリングを弾性変
形させながら第１クラッチ輪休の方に摺動してこれに接
合し、第２車輪駆動軸が第１車輪駆動軸に連動連結され
ることと、第１クラッチ輪休が原動側回転体に先に接合
してｈることに工り、両車輪駆動軸が共に原動側回転体
に連動連結される。　操作具をクラッチ切り位置処する
と、第１クラッチ輪休が第１スプリングにより原動側回
転体から離間されて第１車輪駆動軸と原動側回転体の連
動が解除され、かつ、第コクラッチ輪体が第１クラッチ
輪休から分離して第２車輪駆動軸の原動側回転体及び第
１車輪駆動軸の夫々に対する連動が断たれる。As the operating tool is moved to the clutch engaged position, the second
The clutch wheel rest slides toward the first clutch wheel rest, and this sliding force is transmitted by the second spring, causing the first clutch wheel rest to slide toward the driving-side rotating body; The elastic restoring force difference of the spring,! : First, the first clutch wheel rest is connected to the driving side rotating body, and only the first wheel drive shaft is interlocked and connected to the driving side rotating body.
As the operating tool is further operated from this position to the clutch engaged position, the second clutch wheel elastically deforms the second spring and slides toward and joins the first clutch wheel rest, thereby connecting the second wheel drive shaft. is interlocked and connected to the first wheel drive shaft, and the first clutch wheel rest is connected to the driving side rotating body first, so that both wheel drive shafts are interlocked and connected to the driving side rotating body. Ru. When the operating tool is placed in the clutch disengaged position, the first clutch wheel is separated from the driving side rotating body by the first spring, the interlocking between the first wheel drive shaft and the driving side rotating body is released, and the first clutch wheel is moved away from the driving side rotating body. The first clutch is separated from the rest, and the second wheel drive shaft is disconnected from the driving side rotating body and the first wheel drive shaft.

第１及び第２クラッチ輪休のいずれをも原動側回転体に
対してこれの同一の横倒に配置することにより、両りラ
ッチ輪体を１個の操作具で操作できるようにすることが
、第１クラッチ輪休のみを操作具に連動させるだけで可
能になる。By arranging both the first and second clutch wheels on the same side with respect to the driving side rotating body, both latch wheels can be operated with one operating tool. This can be done simply by interlocking only the first clutch wheel rest with the operating tool.

つまり、第１クランチ輪休と第１クラッチ輪休が原動側
回転体の両横側に振り分は配置されている従来クラッチ
のように、操作具操作に伴い両りラッチ輪体を互に逆方
向−摺動させるための構成、すなわち、操作力が両りラ
ッチ輪体に分岐栄達されるように、かつ、両りラッチ輪
体に対する操作力の作用方向が逆になるようにするため
の構成を操作系に設けなくて済む。In other words, like a conventional clutch in which the first clutch wheel rest and the first clutch wheel rest are arranged on both sides of the driving side rotating body, both latch wheels are moved in opposite directions when the operating tool is operated. Manipulate the configuration for sliding, that is, the configuration so that the operating force is branched to the double latch wheels, and the direction of action of the operating force on the double latch wheels is reversed. No need to install it in the system.

〔発明の効果〕〔Effect of the invention〕

左右車輪の一体躯動状態と、一方のみが停止される状態
と、各別回転自任な遊転状態との、ｖ′Ｊ換えが７個の
操作具を操作するだけの簡単々操作ででき、自走用と人
為移動用の切換え及び片輪駆動によって機体操向させる
ための操作が容易かつ迅速にできるようになった。V'J changes between the left and right wheels moving integrally, only one of them being stopped, and each wheel rotating independently can be changed easily by operating seven operating tools. Switching between self-propelled and manual transportation and single-wheel drive make it easier and faster to direct the aircraft.

前記した操作力分岐厳達構成が不要なことＫより、操作
系が構造簡単にでき、経済部で有利に得られるようにな
った。Since the above-mentioned operation force branching structure is unnecessary, the operation system can be simplified in structure, which can be advantageously obtained by economic departments.

［実施例］ 第５図に示すように、左右一対の遊転前車輪（ｌａ）、
（ｌｂ）及び駆＃可能な後車輪（２ａ）、（２ｂ）、エ
ンジン（３）、操縦ハンドル（４）等を有した自走機体
に、リール式芝刈カッター（５）を切断芝飛散防止カバ
ー（６）内の前端部に配置した状態で駆動自在忙取付け
ると共に、前記カバー（６）の内部に１刈取り芝容器（
７）をカッター（５）の回転によって後方に飛散される
刈取り芝を回収貯留するように、かつ、機体後方から抜
き差し着脱するように設けて、歩行型芝刈り機を構成し
である。[Example] As shown in FIG. 5, a pair of left and right front wheels (la),
A reel-type lawn mowing cutter (5) is attached to the self-propelled body, which has a rear wheel (2a), (2b), an engine (3), a control handle (4), etc., which can be driven (lb), a rear wheel (2a), (2b) that can be driven, and a cover to prevent scattering of grass. (6) is installed so that it can be freely driven while being placed at the front end of the cover (6), and one cut grass container (
7) is provided so as to collect and store the cut grass that is scattered backward by the rotation of the cutter (5), and to be inserted and removed from the rear of the machine body to constitute a walk-behind lawn mower.

前記カンタ−（５）及び後車輪（２ａ）、（２ｂ）の駆
動を可能にするに、第４図に示すように１エンジン（３
）の出力軸（３ａ）にベルトテンション式主クラッチ（
８）を介しては動切り自在に連動させた中間伝動軸（９
）を、ｇｇｌ云動グーケー＋０１　ＶＣ内装した状態で
前記カバー（６）の前端側の上方に設け、前記中間伝動
軸（９）を、ケース（ロ）に内装の撮動チェーン０′４
を介してカッター（６）の回転支軸（５ａ）に連動連結
しである。　そして、前記中間敏動軸（９）の回動力を
フオームギア一式減速機構（１３）及び回転法前軸（１
４）を介して減速入力する。ように構成した第、２法動
ケース（１５）を、前記カバー（６）の後端側の上方に
設け、第、２失動グース０５）に内装しである車輪用ク
ラッチ（１６）の第１及び第２出力軸０η、（１８）の
一方（１８）をケース（１９ａ）　Ｋ内装の駆動チェー
ン（２０ａ　）を介して左後車軸に連動連結し、他方の
出力軸（１ηをケース（１９ｂ）に内装の級動チェーン
（２０ｂ）を介して右後車軸に連動連結しである。In order to drive the canter (5) and the rear wheels (2a) and (2b), one engine (3
) is attached to the output shaft (3a) of the belt tension type main clutch (
8), an intermediate transmission shaft (9
) is installed above the front end side of the cover (6) with the VC installed inside the case (b), and the intermediate transmission shaft (9) is connected to the drive chain 0'4 inside the case (b).
It is interlocked and connected to the rotational support shaft (5a) of the cutter (6) via. Then, the rotational force of the intermediate agile shaft (9) is transferred to the form gear set reduction mechanism (13) and the rotating front shaft (1).
4) Input deceleration via. A second motion case (15) configured as shown in FIG. One of the first and second output shafts 0η, (18) is interlocked and connected to the left rear axle via a drive chain (20a) inside the case (19a), and the other output shaft (1η) is connected to the case (19b). ) is interlocked and connected to the right rear axle via an internal moving chain (20b).

前記クラッチ（１６）は第１図に示すように構成しであ
る。The clutch (16) is constructed as shown in FIG.

すなわち、一対の前記第１及び第２出力軸θ乃、（壇を
同芯状に配置し、第１出力軸θ乃に、原動側回転体ｇｔ
＋をギアー（図、緩動軸（Ｚ３）、ベベルギア−（２４
１及び側を介して入力軸（渕に連動させた状態で相対回
転のみ自在に外嵌しである。　Ｗ、切側回転体Ｉ２１）
に対するｖＪｔクランチ輪休輪体）を、第１出力軸θη
にスプライン係合によって一体回転及び摺動するように
取付けると共に、原動側回転体（２１）に接近させて第
１クランチ輪休ｆ２７１のクラッチ爪（２７ａ）と原動
側回転体Ｃ２１）のクラッチ爪（２１ａ）を咬合させる
と、入り位置になると共に第１出力軸（１７）にも咬合
った捷まに在って、原動側回転体（２１）と１ＪＩＪｌ
出力軸θηとを一体回動する状態に連動連結するように
、かつ、原動側回転体（２１）から離間させて前記両ク
ラッチ爪（２１ａ）、（２７ａ）の咬合いを解眸させる
と、切り位置になって原動側回転体（２１）と第１出力
軸（Ｉηの相対回転をＩｖ能にするように構成しである
。　第１クラッチ輪休翰に対する第２クラッチ輪休（２
８を、第１クラッチ輪休（２ηに対して原動側回転体ｔ
２１）とけ反対側に配置し・た状態で第コ出力軸（国に
スプライン係合によって一体回転及び摺動するように取
付けると共に、第１クラッチ輪休勾に接近させて第１ク
ラッチ輪休端のクラッチ爪（Ｂａｍ　）上第１クラッチ
輪休勾のクラッチ爪（２７ｂ）を咬合させると、クラッ
チ入り位置になると共に第２出力軸Ｑ８ＨＣ咬合したま
まに在って、両出力軸（１？）　、　（＋Ｉ１９を一体
回動する状ｆｆ１Ｋ連動連結するように、かつ、ダ築１
クラッチ翰［有］勃・ら＠　ｌ？Ｕさせて両りランチ爪
（２８ａ）、　（２７ｂ）の咬合を解除させると、クラ
ッチ切り位置になって両田力軸（１７）　、　＋１８）
の相対回転を可能にするように構成しである。That is, a pair of the first and second output shafts θ (the platforms are arranged concentrically, and the driving side rotating body gt is connected to the first output shaft θ).
+ is the gear (see figure, slowing shaft (Z3), bevel gear - (24)
1 and the input shaft through the side (when linked to the edge, only relative rotation is freely fitted to the outside. W, cut side rotating body I21)
vJt (crunch wheel resting body) for the first output shaft θη
The clutch pawl (27a) of the first clutch wheel rest F271 and the clutch pawl (21a) of the driving side rotary body C21 are attached to the drive side rotating body (21) so as to rotate and slide together by spline engagement. ) is in the entry position and is also in the joint that also engages the first output shaft (17), and the drive side rotating body (21) and 1JIJl
When the meshing of both clutch pawls (21a) and (27a) is released by interlocking and connecting the output shaft θη in a state of integral rotation and separating the clutch pawls (21a) and (27a) from the driving side rotating body (21), The configuration is such that the relative rotation between the drive-side rotating body (21) and the first output shaft (Iη is controlled by Iv when it is in the cut position.) The second clutch wheel rest (2
8, the first clutch wheel rest (2η, the driving side rotating body t
21) Attach the output shaft (on the opposite side) so that it rotates and slides integrally through spline engagement, and connect the clutch at the end of the first clutch wheel to the end of the first clutch. When the clutch pawl (27b) with the first clutch wheel resting on the pawl (Bam) is engaged, it becomes the clutch engaged position and the second output shaft Q8HC remains engaged, and both output shafts (1?), (+I19) ff1K are interlocked so that they rotate together, and the construction 1
clutch hand When the two launch claws (28a) and (27b) are released from their engagement by U, the clutch disengagement position is reached and both the power shafts (17) and +18) are released.
It is configured to allow relative rotation of the two.

そして、原動側回転体（２１）と第１クランチ軸体＋２
ηの間に、第１スプリングｆ２９）を原動側回転体（２
１）と第１クラッチ輪休（２７）の少なくとも一方との
摺接によってこれらの相対回転を０１′能にし、かつ、
弾性圧Ｍ変形によって第１クラッチ輪休３′７）の原動
側回転体りｌ）への接近を可能にし、弾性復元力によっ
て第１クラツチ輸休１２力を原動側回転体（社）から離
間操作する状態で介在させると共に、第１クランチ輪休
ｅη（！ｌ−第２クランチ輪休（ハ）の間に、第１スプ
リング＋３０）を第１及び第コクランチ輪体１２カ、（
渚の少なくとも一方との摺接によってこれらの相対回転
を可能にし、かつ、弾性圧縮変形によって第２クラッチ
輪休例の第１クラッチ輪休化ηへの接近を可能にする状
態で介在させである。　第ｔり７ツチ輪休（２ηと原動
側回転体（２１１の咬合い接合状態における第１スプリ
ング翰の弾性復元力が第１クランチ輪休■ηと一第２ク
ラッチ輪休（ハ）の咬合い接合状態における第１スプリ
ング国の弾性復元力より小になるように１両スズリング
（２９）　、　（３０）を復元力差の有するものに設定
しである。　つまり、第２クラッチ軸体（２８１が入り
位置の側に摺動操作されるに伴い、この操作力が第２ス
プリング（３０）を介して快速され、第２図に示すよう
に、第１クラッチ輪休りηが原動側回転体嬶）に咬合い
接合し、さらに第コクラッチ輪体（ハ）が摺動されるこ
とにより、第３図に示すように、第１クランチ輪体Ｑ７
１を反力点として第２スプリング（３０）を弾性変形さ
せて第ｔクラッチ斡体３ηに咬合い接合するようにし、
第１図沈木すように、第コクラッチ輪体（２８）がクラ
ッチ切り位置に摺動されると、これに伴い、第１クラッ
チ輪休（２７）も第１スプリングシ９）の弾性復元力に
よって切り位置に摺動されるようにしである。　そして
、第コクラッチ輪体（ハ）にこれを摺動操作すル［ｌＪ
式シフトフォーク町）、このフォーク町）の回転支軸の
２の第ａｆｉ動ケース（１６）からの突出部に収何けて
ろるシフトフォータ操作アーム（８３）、レリーズツイ
ヤ（財）の大々を介して連動させたｔ個のレバ一式操作
具州を、前記主クラッチ（８）の操作レバー（３６）及
び操亨従ハンドル（４）の大々と共に握り操作できるよ
うにハンドル（４）の握り部伺近に揺動自在に取付け、
操作共（ト）が第１操作位置（ＯＦＦ）に在ると、第１
図に示すように両りラッチ輪体１２７）　、　＋２６）
が共に切り位ｕｑに在り、左右後輪（２ａ）、’（２ｂ
）が各別回転ｉ′ｉ］″能な遊転状態になるところの機
体手押し移動用状態が現出されるように、操作具（、？
りを第２操作位置（Ａ）にすると、＠２図に示すように
、第１クラッチ軸体（２７）のみが入り位置になり、機
体操向されるように右側後輪（２ｂ）のみが駆動される
躯＃操向用状態が現出されるように、操作具諏を第Ｊ操
作位ｔｉｆｔ、（ＯＮ）に操作すると、第３″図に示す
ように両クラッチ軸体＋２７１．　ｗが共に入りになり
、左右後ＩＦ＆　（２ａ）、（２ｂ）が同一回転方向に
一体駆！ｉυ１されるところの機体自走用状態が現出さ
れるようにしである。Then, the driving side rotating body (21) and the first crunch shaft body +2
η, the first spring f29) is connected to the driving side rotating body (2
1) and at least one of the first clutch wheel rests (27), the relative rotation thereof is made 01', and
The elastic pressure M deforms the first clutch wheel rest 3'7) to approach the driving side rotating body l), and the elastic restoring force moves the first clutch resting force 12 away from the driving side rotating body (l). At the same time, the first crunch wheel rest eη (! l - between the second crunch wheel rest (c), the first spring + 30) is inserted between the first and second co-crunch wheel rests (12), (
The clutch is interposed in such a manner that relative rotation thereof is enabled by sliding contact with at least one of the shores, and the second clutch wheel resting example is allowed to approach the first clutch wheel resting position η by elastic compression deformation. The elastic restoring force of the first spring in the state where the 7th clutch wheel rest (2η) and the driving side rotating body (211) are engaged is the state where the first clutch wheel rest ■η and the 1st and 2nd clutch wheel rest (c) are engaged. The first spring ring (29) and (30) are set to have a difference in restoring force so that the elastic restoring force of the first spring is smaller than that of the first spring.In other words, when the second clutch shaft (281 is in the engaged position As the sliding operation is performed to the side, this operating force is quickly applied via the second spring (30), and as shown in FIG. As shown in FIG.
1 as a reaction force point, the second spring (30) is elastically deformed so as to be engaged with the t-th clutch body 3η,
As shown in Fig. 1, when the first clutch wheel (28) is slid to the clutch disengaged position, the first clutch wheel rest (27) is also disengaged due to the elastic restoring force of the first spring 9). It is meant to be slid into position. Then, slide it onto the No. 1 clutch wheel (c).
The shift fork operation arm (83) fits into the protrusion from the second AFI movement case (16) of the rotary support shaft of this fork (formula shift fork), and the large size of the release gear. of the handle (4) so that a set of t levers operated in conjunction with each other can be gripped and operated together with the operation lever (36) of the main clutch (8) and the slave handle (4). Attaches freely near the grip, allowing it to swing freely.
When the operation switch (g) is in the first operation position (OFF), the first
As shown in the figure, both latch rings 127), +26)
are both at the cutting position uq, and the left and right rear wheels (2a) and '(2b
) is set so that the operating tool (, ?
When the lever is placed in the second operation position (A), as shown in Figure 2, only the first clutch shaft (27) is in the engaged position, and only the right rear wheel (2b) is in the engaged position so that the aircraft is oriented. When the operating tool is operated to the J operation position (ON) so that the steering state of the driven body appears, both clutch shaft bodies +271. This is to create a self-propelled state in which the left and right rear IF& (2a) and (2b) are driven together in the same rotational direction!iυ1.

し応用例〕 前記出力軸（ｌη、（国は車軸に変更可能であり、これ
らを車輪に連動された第１車輪駆動輔■乃又は第２車輪
駆動軸（１８）と称する。Application example] The output shaft (lη, (country) can be changed to an axle, and these are referred to as the first wheel drive shaft (18) or the second wheel drive shaft (18) linked to the wheels.

本発明は、歩行型耕耘機やバインダー等各種の歩行型作
業車に適用できる。INDUSTRIAL APPLICATION This invention is applicable to various walk-behind work vehicles, such as a walk-behind tiller and a binder.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明に係る歩行型作業車の車輪用クラッチの実
施例を示し、第１図は車輪遊転状的の断面図、第２図は
駆動操向状態の断面図、第３図は車輪駆動状態の断面図
、第４図は敏切系統図、第５図は歩行型芝刈り機の全体
側面図である。 （２ａ）、（２ｂ）・・・・・・車輪、Ｑ７）・・・・
・第１車輪駆動軸、（１８＋・・・・・・第２車軸駆動
軸、（２１）・・・・・・原動側回転体、（２７１・・
・・・・第１クラッチ輪休、馨〜・・・・・・第２クラ
ッチ輪休、（２９）山・７・・第１スプリング、（榊・
・・・・・第２スプリング、弛・・・・・・操作具。The drawings show an embodiment of the clutch for a wheel of a walk-behind work vehicle according to the present invention, in which FIG. 1 is a sectional view of the wheel in an idling state, FIG. 2 is a sectional view of the drive steering state, and FIG. 3 is a sectional view of the wheel FIG. 4 is a cross-sectional view of the driving state, FIG. 4 is a power system diagram, and FIG. 5 is an overall side view of the walk-behind lawn mower. (2a), (2b)... Wheels, Q7)...
・First wheel drive shaft, (18+... Second axle drive shaft, (21)... Drive side rotating body, (271...
・・・・1st clutch wheel rest, Kaoru～・・2nd clutch wheel rest, (29) Mountain 7・・1st spring, (Sakaki・
...Second spring, relaxation...Operation tool.

Claims (1)

【特許請求の範囲】[Claims] 左右一対の走行用車輪（Ｈａ）、（１）に各別に連動さ
せた％ｌ車１１ｉ１駆動軸０７）と第２車輪駆動軸Ｑ杓
を同芯状に配置し、原動側回転体Ｑυを前記第ｆ車輪駆
動軸（１７）に相対回転自在に取付け、前記原動側回転
体（２１）に対する＠ｌクラッチ軸体（財）を、前記原
動側回転体（２１）　Ｋ接近した入り位置と前記原動側
回転体（２１）から離間した切り位置とに摺動自任な状
態で前記第１車輪駆動軸（１７）に一体回転自任に取付
け、前記第１クラッチ輪休Ｑ７１に対する％Ｊクラッチ
輪輪体を、前記第１クラツチ、輪体ｃ２７）の前記原動
側回転体１２１）側とは反対側に配置した状態で、かつ
、前記第１クラツチ輪体シηに接近した入り位置と前記
第２クラッチ輪休（ハ）から離間した切り位置とに摺動
自在、な状態で前記第２車輪駆動軸（田に一体回転自在
に取付け、前記第１クラッチ輪休（ロ）を前記原動側回
転体＠１）から離間操作する第１スプリングシ９）を設
けると共に、前記第１クラッチ輪体（２ηと前記第１ク
ラツチ輪休し模の間に第２スプリング（３）を設け、前
記第２クラッチ輪休（ハ）に対してこれを摺動操作する
ように／個の操作具−を連動させ、前記第１クラッチ輪
体（財）と前記原動側回転体（２幻の接合状態における
前記第１スプリング四の弾性復元力を、前記両りラッチ
輪体（財）、（ハ）の接合状態における前記第２スプリ
ング−〇弾性復元力より小に設定しである歩行型作業車
の車輪用クラッチ。The pair of left and right running wheels (Ha), (1) are respectively interlocked with the %l car 11i1 drive shaft 07) and the second wheel drive shaft Q scoop are arranged concentrically, and the driving side rotating body Qυ is It is attached to the f-th wheel drive shaft (17) so as to be relatively rotatable, and the @l clutch shaft body (goods) for the driving side rotating body (21) is connected to the input position where the driving side rotating body (21) approaches K and the driving side. A %J clutch wheel body for the first clutch wheel rest Q71 is attached to the first wheel drive shaft (17) so as to be able to rotate freely and slide freely in a cut position spaced from the side rotating body (21), and The first clutch is disposed on the opposite side of the drive-side rotating body 121) of the wheel c27), and is in an engaged position close to the first clutch wheel c27) and at a resting position of the second clutch wheel c27). C) The second wheel drive shaft is integrally and rotatably attached to the second wheel drive shaft in a state where it can slide freely to a cut position spaced apart from the cut position, and the first clutch wheel rest (B) is separated from the driving side rotating body @1). A first spring spring 9) to be operated is provided, and a second spring (3) is provided between the first clutch wheel body (2η) and the first clutch wheel rest, and a second spring (3) is provided between the first clutch wheel body (2η) and the first clutch wheel rest (c). The elastic restoring force of the first spring 4 in the state of connection between the first clutch ring body and the driving side rotary body is set to be smaller than the elastic restoring force of the second spring when the both latch wheel bodies and (c) are connected.