JPS5849854Y2 - Mission structure of walking cultivator - Google Patents

Description

【考案の詳細な説明】 本考案は、歩行形耕耘機のミッション構造に関する。[Detailed explanation of the idea] The present invention relates to a mission structure for a walk-behind cultivator.

すなわち、差動式駆動機構とサイドクラッチ式駆動機構
の両方を付備して構成する歩行形耕耘機のミッションに
関して従来のものは、例えば実公昭４８−１００８８号
公報等に示される如く、差動式駆動機構を構成する太陽
歯車及び遊星歯車群が伝動軸上に左右一対にそれぞれ各
別に配設されるものであることから、差動式駆動機構全
体が大形化すると共に、差動式駆動機構の具体的構成に
関しても、差動連動あるいは差動ロックのために左右の
太陽歯車及び遊星歯車群間に特別な動力伝達手段を差動
式駆動機構幅全体に亘り設ける必要がある他、特に遊星
歯車群の支持部材を左右各別に設けなければならない等
その構成が非常に複雑化していたのであり、加えて前述
の様な差動式駆動機構全体の大形化により該機構の側方
にサイドクラッチ装置を設けるに際してはスペース上の
制約から伝動軸に孔を穿設し該伝動軸孔内にサイドクラ
ッチボール操作具を内設するといった非常に複雑なサイ
ドクラッチ機構を採用しなければならなかったのである
。That is, conventional walk-behind cultivators that are equipped with both a differential drive mechanism and a side clutch drive mechanism have a differential drive mechanism, as shown in Japanese Utility Model Publication No. 48-10088, etc. Since the sun gear and planetary gear groups that make up the differential drive mechanism are arranged separately on the transmission shaft in pairs on the left and right, the entire differential drive mechanism becomes larger and the differential drive Regarding the specific structure of the mechanism, it is necessary to provide a special power transmission means between the left and right sun gears and planetary gear groups over the entire width of the differential drive mechanism for differential interlocking or differential locking. The configuration was extremely complicated, as support members for the planetary gear group had to be provided separately for the left and right sides, and in addition, as the entire differential drive mechanism as mentioned above became larger, it was necessary to install support members on the sides of the mechanism. When installing a side clutch device, due to space constraints, it is necessary to adopt a very complicated side clutch mechanism in which a hole is drilled in the transmission shaft and a side clutch ball operating tool is installed inside the transmission shaft hole. It was.

本考案は前述の様な問題点に鑑み為されたものであって
、差動歯車式駆動横溝におけるデフギヤケース部分、太
陽ギヤ部分釦よびサイドクラッチ駆動伝達部をコンパク
トに形成するとともに各部を良好に組合わせて全体を小
形に構成でき、確実なる伝動機能を有し、歩行形耕耘機
のミッションとして好適に実施できるよう提供するもの
である。The present invention has been developed in view of the above-mentioned problems, and is designed to compactly form the differential gear case part, sun gear part button, and side clutch drive transmission part in the differential gear type drive horizontal groove, and to improve each part in good condition. When combined, the entire structure can be made compact, has a reliable transmission function, and can be suitably implemented as a mission of a walk-behind cultivator.

次に、図面に示す実施例について説明する。Next, the embodiment shown in the drawings will be described.

第１図は歩行形耕耘機の側面図を示し、７は、ミッショ
ンケース、８は車輪、９はエンジンフレーム、１０はエ
ンジン、１１は伝動カバー、１２は耕耘部、１３はノ・
ントンレである。Fig. 1 shows a side view of the walk-behind cultivator, 7 is a transmission case, 8 is a wheel, 9 is an engine frame, 10 is an engine, 11 is a transmission cover, 12 is a tiller, 13 is a no.
It is Ntonre.

前記□ツションケース７の下部には両側に左右車輪８へ
動力伝達する伝動軸としての車軸１，１′をベアリング
１４．１４’等により軸支して装設し、接近する車輪１
，１′の内端部にはそれぞれやや小径の支軸部１ａｙ１
ａ’を形成し、両立軸部１ａ、Ｉａ’の外方部分には一
定長の雄スプラインｉ ｓ 、 ｉ ｓ’をそれぞれ形
成する。Axles 1, 1' as transmission shafts for transmitting power to the left and right wheels 8 are supported on both sides by bearings 14, 14', etc. on the lower part of the tension case 7, and the approaching wheels 1
, 1' have a slightly smaller diameter support shaft 1ay1 at their inner ends.
a', and male splines i s and i s' of constant length are formed on the outer portions of the compatible shaft portions 1a and Ia', respectively.

前記両車軸１，１′にまたがって差動歯車式駆動機構を
装設するが、該機構は、両立軸部１ ａ ｓ １ ａに
それぞれ、小径の太陽ギヤａ ｓ ａ’を遊嵌するとと
もに、両太陽ギヤａｌａｌ’の外側部には軸心に直交す
る壁部１６，１６’をそれぞれ連ねて径大に形威し、両
壁部１６，１６の外周に向けて短鰍の径太部Ａ、 Ａ％
それぞれ形威し、両壁部１６，１６’には複数の油孔１
７ 、１７’をそれぞれ穿設し周径大部Ａ、Ａ′の外周
に訃ける外端側にはそれぞれ段部１８，１＆’を形成し
、周径太部Ａ、Ａ′の内方周面にち・ける中央部にはサ
イドクラッチ用ボール１９．１９’の半径部が嵌合する
軸方向溝形の駆動伝達部３．’ｆｆをそれぞれ形成し、
駆動伝達部３，３′の外方にはボール１９ 、１９’が
軸方向に移動しないようにそれぞれスナップリング２０
．２０’を嵌着し、一方の径大部への外周にはデフロッ
ク装置Ｃにおけるボール２１が係合できる軸方向の保合
溝２２を一定間隔おきに形成して構成する。A differential gear drive mechanism is installed across both axles 1 and 1', and this mechanism loosely fits a small-diameter sun gear a s a' into the compatible shaft portion 1 a s 1 a, respectively. , the outer parts of both sun gears are formed with large diameter walls 16 and 16' that are perpendicular to the axis, respectively, and the thick diameter parts of the short ribs extend toward the outer peripheries of both wall parts 16 and 16. A, A%
Both walls 16 and 16' have a plurality of oil holes 1.
7 and 17' are bored, respectively, and stepped portions 18 and 1&' are formed on the outer end sides of the large diameter parts A and A', respectively, and the inner peripheries of the large diameter parts A and A' are formed. In the central part facing the surface, there is an axial groove-shaped drive transmission part 3 into which the radius part of the side clutch ball 19, 19' fits. 'ff respectively,
Snap rings 20 are provided outside the drive transmission parts 3 and 3' to prevent the balls 19 and 19' from moving in the axial direction.
．． 20' is fitted, and axial retaining grooves 22 in which the balls 21 of the differential lock device C can engage are formed at regular intervals on the outer periphery of one large diameter portion.

つぎに、差動歯車式駆動機構のデフギヤケースＢについ
て説明する。Next, the differential gear case B of the differential gear type drive mechanism will be explained.

差動用のデフギヤケースＢは、その中央の内周に中空の
円板状の短い壁部５ ａ ＊ ５ ａ’を形成するとと
もに、両壁部５ａ、５ａ’と入力用ギヤとしての車軸ギ
ヤ４内方との間には凹形部５を形成し、凹形部５０両側
方であってデフギヤケースＢの両側方部位には、短筒状
の側部す、ｂ’をそれぞれ形成し、両側部す、ｂ’間に
おける凹形部５の外周上には周囲方向に間隔をおいて連
結間部２３を形成して該連結間部２３による連結でもっ
てデフギヤケースＢ全体は１個体にして形威される。The differential gear case B for differential has a hollow disc-shaped short wall 5a*5a' formed on the inner periphery of its center, and both walls 5a, 5a' and an axle gear serving as an input gear. A concave portion 5 is formed between the inside of the differential gear case B, and short cylindrical side portions S and b' are formed on both sides of the concave portion 50 and on both sides of the differential gear case B. Connecting portions 23 are formed at intervals in the circumferential direction on the outer periphery of the concave portion 5 between both side portions s and b', and the entire differential gear case B is made into one piece by the connection by the connecting portions 23. Formally imposing.

ｌた、凹形部５の外周上における連結間部２３のｂ側の
外周には取付鍔部２４を形威し、側部す側からリングギ
ヤ形の入力用平歯車式車軸ギヤ４を連結間部２３の外周
に嵌合するとともに、前記取付鍔部２４の取付孔２５に
挿通したセットボルト２６を車軸ギヤ４のねじ孔２７に
螺挿し車軸ギヤ４を嵌合固定して、前記凹形部５内に挿
入する平歯車式遊星ギヤ２，２′の支軸６，６′の両端
を両壁部５ ａ ｒ ５ ａ’に設けである支持孔２８
．２８’に嵌入してそれぞれにカラー２９を一方寄りに
嵌合醜周囲上に遊星ギヤ２，２笠互いに一部分嵌合して
一組とべ交互に嵌合して千鳥状に取付けて構成する。In addition, a mounting flange 24 is formed on the outer periphery of the connection gap 23 on the b side on the outer circumference of the concave portion 5, and a ring gear type input spur gear type axle gear 4 is attached from the side side to the connection gap. The set bolt 26, which is fitted into the outer periphery of the section 23 and inserted into the mounting hole 25 of the mounting flange section 24, is screwed into the screw hole 27 of the axle gear 4, and the axle gear 4 is fitted and fixed. Both ends of the support shafts 6, 6' of the spur gear type planetary gears 2, 2' to be inserted into the support holes 28 are provided in both walls 5a'.
．． 28', and a collar 29 is fitted to each of them to one side, and the planetary gears 2, 2 caps are partially fitted to each other on the periphery, and one set is fitted alternately and installed in a staggered manner.

また、前記デフロック装置Ｃは、デフギヤケースＢの一
方側部すに一定間隔をおいて多数の孔部３０を形成し、
前記係合溝２２と孔部３０には両者にまたがるよう前記
ボール２１を嵌入し、側部すの外周面に移動自在に嵌合
したクラッチ体３１の内方側部における内周面には一定
間隔おきに係合溝部３２を形成し、クラッチ体３１０周
面における溝部３３にシフターを係合して操作できるよ
うに構成するが、側部すの外側周上にはスナップリング
３４をストッパーとして嵌合係止する。Further, the differential lock device C has a large number of holes 30 formed at regular intervals on one side of the differential gear case B,
The ball 21 is fitted into the engagement groove 22 and the hole 30 so as to straddle both, and a constant ball 21 is fitted on the inner peripheral surface of the inner side of the clutch body 31 which is movably fitted to the outer peripheral surface of the side part. Engagement grooves 32 are formed at intervals so that the shifter can be operated by engaging the grooves 33 on the circumferential surface of the clutch body 310, but a snap ring 34 is fitted as a stopper on the outer circumference of the side surface. Match and lock.

Ｄ、σはサイドクラッチ装置を示し、両サイドクラッチ
装置り、Ｙｊを差動歯車式駆動機構における両側方の径
大部Ａ、Ｒの内方にそれぞれ装設するが、両サイドクラ
ッチ装置り、Ｄ’は、両車軸１．１′の雄スプライン１
５ 、１５’にクラッチ体ｄ、ｄ’の雌スプライン３５
、３５’をそれぞれ嵌合し、クラッチ体ｄ 、 ｄ’
の外周には前記ボール１９゜１９′が嵌入できる軸方向
の保合溝３６．３６’を多数形成し、係合溝３６．３６
’の外方におけるクラッチ体ｄ 、 ｄ’の側方外周に
は単なる周面部３７゜３７′を形成臥前記両壁部１６
、１６’とクラッチ体ｄ、ｄ’の間には圧縮スプリング
３８．３８’を介装して、両側外方に釦ける操作シフタ
ー３９．３９’をクラッチ体ｄ 、 ｄ’１７）外側面
に接合して操作できるように構成する。D and σ indicate side clutch devices, and Yj is installed inside the large diameter portions A and R on both sides of the differential gear type drive mechanism, respectively. D' is male spline 1 of both axles 1.1'
5, female spline 35 of clutch body d, d' to 15'
, 35', respectively, and the clutch bodies d, d'
A large number of engagement grooves 36.36' in the axial direction into which the balls 19° 19' can be fitted are formed on the outer periphery of the engagement grooves 36.36.
A mere circumferential surface portion 37° 37' is formed on the side outer periphery of the clutch bodies d and d' on the outside of the wall portions 16.
, 16' and the clutch bodies d, d' are interposed with compression springs 38, 38', and operation shifters 39, 39' that can be pressed outward on both sides are attached to the outer surfaces of the clutch bodies d, d' (17). Configure it so that it can be connected and operated.

なお図中、４０は平歯車である伝動上位の伝動ギヤであ
る。In the figure, 40 is a spur gear which is an upper transmission gear.

したがって、デフギヤケースＢにおける凹形部５の外方
周部に車軸ギヤ４を嵌合してセットボルト２６により固
定し、周径太部Ａ 、 Ａ’の外周にデフギヤケースＢ
の短筒状側部す、ｂ’の内周部を外嵌した状態で、支軸
６，６′の両端面が両壁部１６゜１６′に対応する状態
となり、一方の遊星ギヤ２が一方の太陽ギヤａに、渣た
他方の遊星ギヤ２′が他方の太陽ギヤａ？噛合する状態
となり、また、遊星ギヤ２と２′同志は相互に一部噛合
する状態となって組付けられる。Therefore, the axle gear 4 is fitted onto the outer periphery of the concave portion 5 of the differential gear case B and fixed with the set bolt 26, and the differential gear case B is fitted onto the outer periphery of the thick periphery portions A and A'.
With the inner periphery of the short cylindrical side portions 16 and 16' of The other planetary gear 2' that is stuck to one sun gear a is the other sun gear a? In addition, the planetary gears 2 and 2' are assembled in a state where they are partially meshed with each other.

しかして、伝動ギヤ４０に噛合する車軸ギヤ４が回転す
ると同時にデフギヤケースＢが回転し、デフギヤケース
Ｂ側の遊星ギヤ２，２′と太陽ギャａ 、 ａ’との噛
合によシザイ ドクラッチ装置り、Ｄ’を介して両車軸
１，１′に対し差動式伝動が行われる。At the same time as the axle gear 4 meshing with the transmission gear 40 rotates, the differential gear case B rotates, and the scissor clutch device is activated by the meshing of the planetary gears 2, 2' on the differential gear case B side with the sun gears a, a'. , D', a differential transmission takes place for both axles 1, 1'.

この機構を説明すると、筐ず、左右の車軸に同一のトル
クがかかつているとき、左右の遊星ギヤ２，２′は支軸
６．６’の回転につれて互いに同一方向に回転しようと
し遊星ギヤ２，２′同志の噛合にて力をぶつけ合うが、
トルクが同一のため回転力が同じとなり打消し合い結局
遊星ギヤ２，２は回転せず、太陽ギヤａ、ａ’と噛合し
た１１支軸６．６′の取付けられたデフギヤケースＢと
一体となって同一方向１１ａ転する。To explain this mechanism, when the same torque is applied to the left and right axles, the left and right planetary gears 2, 2' try to rotate in the same direction as the support shaft 6.6' rotates, and the planetary gears 2 and 2' try to rotate in the same direction as the support shaft 6. , 2' The forces collide with each other when they mesh, but
Since the torques are the same, the rotational forces are the same and cancel each other out.As a result, the planetary gears 2 and 2 do not rotate, and are integrated with the differential gear case B to which the 11 support shafts 6 and 6' are attached, meshing with the sun gears a and a'. and rotates in the same direction 11a.

左右のトルクに差がある場合は、その力の差の分だけ遊
星ギヤ２，２′同志が回転し、デフギヤケースＢと太陽
ギヤは全体としては同一方向で回転しながら、遊星ギヤ
２．２亦回転する分だけ一方の太陽ギヤの回転数が増加
し、他方の太陽ギヤの回転数が減少して、差動機構とな
る。If there is a difference between the left and right torques, the planetary gears 2 and 2' rotate by the difference in force, and while the differential gear case B and the sun gear rotate in the same direction as a whole, the planetary gears 2 and 2 rotate. The rotation speed of one sun gear increases by the additional rotation, and the rotation speed of the other sun gear decreases, forming a differential mechanism.

サイドクラッチ装置り、Ｄ’にむいては、操作シフター
３９．３９’を強制操作しないと、圧縮スプリング３８
．３８’に弾圧されるクラッチ体ｄ 、 ｄ’の係合溝
３６，３６’と駆動伝達部３，３′にボール９．９′が
またかり第２図の左方に示すようにクラッチ入りの状態
となり、圧縮スプリング３８．３８’に抗してクラッチ
体ｄ 、 ｄ’を移動させると、ボール１９．１９％ク
ラッチ体ｄ、ｄ’の周面部３７゜３７′に接してすべり
、そのために第２図の右方に示すようにクラッチ切りの
状態となる。For the side clutch device D', if the operation shifter 39, 39' is not forcibly operated, the compression spring 38
．． Balls 9 and 9' straddle the engagement grooves 36 and 36' of the clutch bodies d and d' that are pressed by the clutch members 38' and the drive transmission parts 3 and 3', and as shown on the left side of Fig. 2, the clutch is engaged. state, and when the clutch bodies d and d' are moved against the compression springs 38 and 38', the balls 19.19% slide in contact with the circumferential surfaces 37 and 37' of the clutch bodies d and d', and as a result, the first As shown on the right side of Figure 2, the clutch is in a disengaged state.

渣た、シフターによりクラッチ体３１を移動させて、ボ
ール２１を係合溝部３２から押出して孔部３０と係合溝
２２にまたがらせて第２図に示す状態に操作すると、デ
フギヤケースＢと遊星ギヤ２，２′及び太陽ギヤａｌａ
’がロックされ一体となって回転し、デフロック操作を
なすことができて左右の車軸１，１′が一体となって回
転する状態となり１第４図に示すようにクラッチ体３１
を移動させてボール２１を係合溝部３２と孔部３０にま
たからせる状態にするとデフロックの解除をなして前記
のように差動式伝動をなすことができる。When the clutch body 31 is moved by the shifter and the ball 21 is pushed out from the engagement groove 32 so as to straddle the hole 30 and the engagement groove 22 and operated to the state shown in FIG. 2, the differential gear case B and Planetary gears 2, 2' and sun gear ala
' is locked and rotates as one unit, and a differential lock operation can be performed, and the left and right axles 1, 1' rotate as one unit. 1 As shown in FIG. 4, the clutch body 31
By moving the ball 21 so that it is wrapped around the engagement groove 32 and the hole 30, the differential lock is released and differential transmission can be performed as described above.

このように本考案は、差動式駆動機構とサイドクラッチ
式駆動機構の両方を付備して構成する歩行形耕耘機のミ
ッションにおいて、左右車輪８，８へ動力伝達する伝動
軸１，１′をその軸端部を互いに接近させてミッション
ケース７に支持させると共に、該伝動軸１，１′の前記
軸端部上には前記伝動軸１，１′に動力伝達する太陽ギ
ヤａ、ａ’をその外側方を径大部Ａ、Ａ′に形成して設
ける一方、外周に入力用のギヤ４を装設したデフギヤケ
ースＢの内方中央部には前記太陽ギヤａ、ａ’と噛合し
且つ互いに部分嵌合する遊星ギヤ２，２′を支軸６゜Ｃ
を介し設けて差動式駆動機構を構成し、さらに前記太陽
ギヤａｌａ’の一方の前記径大部Ａの外周部に係合溝２
２を、該係合溝２２と対向する前記デフギヤケースＢ一
方側部すに孔部３０をそれぞれ形成すると共に、両者間
に！、たかるようにボール２１を嵌入してデフロック装
置Ｃを構成し、また前記太陽ギヤａｔａ’の径大部Ａ、
Ａ’の内周部には溝形の駆動伝達部３，３′を形成し前
記伝動軸１．１年にスプライン嵌合するクラッチ体ｄ、
ｄ’の外周部には係合溝３６ 、３６’を形成すると共
に前記駆動伝達部３，３′及び係合溝３６，３６’間に
サイドクラッチボール１９，１９’を介在サセてサイド
クラッチ装置り、Ｄ’を構成したことから、差動式駆動
機構を構成する太陽ギヤａ、ｌａ’及び遊星ギヤ２ 、
ｆｆを伝動軸１，１′の両軸端部に集中して配設するこ
ととなるために、差動式駆動機購全体がコンパクトに形
成されることとなり、また差動式駆動機構の具体的構成
も、差動運動のために左右遊星ギヤ２，２′群間に特別
な動力伝達手段を設ける必要もなく、さらに左右の遊星
ギヤ２．２％の支持部材をデフギヤケース部分部材で共
用し得る等、デフギヤケース部分、太陽ギヤ部分をコン
パクトに組合わせて非常に簡潔なものと為し得、特に前
記太陽ギヤａ、ａ’の一方の径大部Ａとデフギヤケース
Ｂの一方側部すとの間にボール式のデフロック装置Ｃを
設けるものであるために従来のような左右の太陽歯車及
び遊星歯車群間に設けられた差動兼用のデフロック手段
と比較してデフロック装置を極１めて簡潔なものに構成
し得、加えて差動式駆動機構をコンパクトに形成し得る
ためにスペース上の制約を受けずサイドクラッチ装置り
、ｆｆを簡潔な構成のものに形成し得、特に、前記太陽
ギヤａ ｌ ａ’め径大部Ａ、Ａ’にクラッチ体ｄ、ｄ
’＆対向内設して差動式駆動機構とサイドクラッチ式駆
動機構とをコンパクトに一体化し得、全体として確実な
る伝動機能を有したコンパクトなる全体として確実なる
伝動機能を有し、歩行形耕籾機のミッションとして好適
に実施し得るという顕著なる特徴を有する。In this way, the present invention provides a transmission shaft 1, 1' that transmits power to the left and right wheels 8, 8 in a walk-behind cultivator equipped with both a differential drive mechanism and a side clutch drive mechanism. are supported by the transmission case 7 with their shaft ends close to each other, and on the shaft ends of the transmission shafts 1, 1' are sun gears a, a' for transmitting power to the transmission shafts 1, 1'. are provided with their outer sides formed into large-diameter parts A and A', while the inner central part of the differential gear case B, which has the input gear 4 installed on its outer periphery, is provided with the sun gears a and a' engaged with the sun gears a and a'. The planetary gears 2 and 2', which are partially fitted to each other, are held at a supporting shaft of 6°C.
A differential drive mechanism is constructed by providing an engagement groove 2 on the outer periphery of one of the large diameter portions A of the sun gear ala'.
2, a hole 30 is formed in one side of the differential gear case B facing the engagement groove 22, and a hole 30 is formed between the two! , the ball 21 is fitted so as to form a differential lock device C, and the large diameter portion A of the sun gear ata',
A clutch body d having groove-shaped drive transmission portions 3, 3' formed on the inner circumference of A' and spline-fitted to the transmission shaft 1.1;
Engagement grooves 36, 36' are formed on the outer periphery of d', and side clutch balls 19, 19' are interposed between the drive transmission parts 3, 3' and the engagement grooves 36, 36' to form a side clutch device. Since D' is configured, sun gears a, la' and planetary gears 2, which constitute the differential drive mechanism,
Since the ff is concentrated on both ends of the transmission shafts 1 and 1', the entire differential drive mechanism can be made compact, and the specifics of the differential drive mechanism can be made compact. There is no need to provide a special power transmission means between the left and right planetary gear groups 2 and 2' for differential movement, and the support member for 2.2% of the left and right planetary gears is shared by the differential gear case partial member. The differential gear case part and the sun gear part can be combined compactly to make it very simple, especially one large diameter part A of the sun gears a, a' and one side part of the differential gear case B. Since the ball-type differential lock device C is installed between the left and right sun gears and planetary gear groups, the differential lock device C is extremely simple compared to the conventional differential lock device installed between the left and right sun gears and planetary gear groups. In addition, since the differential drive mechanism can be formed compactly, the side clutch device and ff can be formed into a simple structure without being subject to space constraints. , clutch bodies d, d are attached to the large diameter portions A, A' of the sun gear a l a'.
The differential drive mechanism and the side clutch drive mechanism can be integrated compactly by installing the differential drive mechanism and the side clutch drive mechanism internally, and have a reliable transmission function as a whole. It has the remarkable feature that it can be suitably implemented as a mission for a rice huller.

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

図面は本考案の実施例を示し、第１図は耕耘機の側面図
、第２図は要部の断面図、第３図は第２図の二部を示し
、第４図は第２図の他の二部を示ｊ１第５図は第３図の
一部の側面図、第６図は第２図の中央部分の断面図であ
る。 １．１′−・・伝動軸（車軸）、２，２′−・・遊星ギ
ヤ、３．３’・・駆動伝達部、４・・・入力用ギヤ（車
軸ギヤ）６ 、６’・・支軸、７・・・ミッションケー
ス、８，８・・・車輪、１９．１９′・・・サイドクラ
ッチボール、２１・・・ポール、２２・・・係合溝、３
０・・・孔部、３６゜３６’−・・係合溝、Ａ 、 Ａ
’−・・径大部、ａ ｓ ａ′−・”太陽ギヤ、Ｂ・・
・デフギヤケース、ｂ、ｂ′・・・側部、Ｃ・・・デフ
ロック装置、Ｄ、Ｄ’−・・サイドクラッチ装置、ｄ、
ａ’・・・クラッチ体。The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the tiller, Fig. 2 is a sectional view of the main part, Fig. 3 shows the second part of Fig. 2, and Fig. 4 is the same as Fig. 2. FIG. 5 is a side view of a portion of FIG. 3, and FIG. 6 is a sectional view of the central portion of FIG. 2. 1.1'--Transmission shaft (axle), 2,2'--Planetary gear, 3.3'--Drive transmission section, 4--Input gear (axle gear) 6, 6'-- Support shaft, 7...Mission case, 8,8...Wheel, 19.19'...Side clutch ball, 21...Pole, 22...Engagement groove, 3
0...Hole, 36°36'-...Engagement groove, A, A
'-...Large diameter part, a s a'--'Sun gear, B...
・Differential gear case, b, b'...side part, C...differential lock device, D, D'-...side clutch device, d,
a'...Clutch body.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 差動式駆動機構とサイドクラッチ式駆動機構の両方を付
備して構成する歩行形耕耘機の□ツションにかいて、左
右車輪８，８へ動力伝達する伝達軸１，１′をその軸端
部を互いに接近させてミッションケース７に支持させる
と共に、該伝動軸１，１′の前記軸端部上には前記伝動
軸１．１に伝動伝達する太陽ギヤａ 、 ａ’をその外
側方を径大部Ａ、Ａ’に形成して設ける一方、外周に入
力用ギヤ４を装設したデフギヤケースＢの内方中央部に
は前記太陽ギヤａ 、 ａ’と噛合し且つ互いに部分嵌
合する遊星ギヤ２，２俊支軸６，６′を介し設けて差動
式駆動機構を構成し、さらに前記太陽ギヤａ 、 ａ′
の一方の前記径大部Ａの外周部に係合溝２２を、該係合
溝２２と対向する前記デフギヤケースＢ一方側部すに孔
部３０をそれぞれ形成すると共に、両者間にまたかるよ
うにボール２１を嵌入してデフロック装置Ｃを構成し、
また前記太陽ギヤａ、ａ′の径大部Ａ、Ａ”）内周部に
は溝形の駆動伝達部３，３′を形威し、前記伝達軸１．
１’ｌにスプライン嵌合するクラッチ体ｄ 、 ｄ’の
外周部には保合溝３６．３６’を形成すると共に前記駆
動伝達部３，３′及び係合溝３６，３６’間にサイドク
ラッチボール１９，１９’を介在させてサイ ドクラッ
チ装置り、Ｄ’を構成したことを特徴とする歩行形耕耘
機のミッション構造、っThe transmission shafts 1, 1', which transmit power to the left and right wheels 8, 8, are connected to the shaft ends of the walk-behind cultivator, which is equipped with both a differential drive mechanism and a side clutch drive mechanism. The transmission shafts 1.1 and 1.1 are supported by the transmission case 7 in close proximity to each other, and sun gears a, a' for transmitting power to the transmission shaft 1.1 are mounted on the shaft ends of the transmission shafts 1, 1' with their outer sides facing forward. The sun gears A, A' are formed in the large diameter parts A, A', and the input gears 4 are installed on the outer periphery of the differential gear case B. The planetary gears 2, 2 are provided via support shafts 6, 6' to constitute a differential drive mechanism, and the sun gears a, a'
An engagement groove 22 is formed in the outer periphery of one of the large-diameter portions A, and a hole 30 is formed in one side of the differential gear case B facing the engagement groove 22, and a hole 30 is formed so as to extend between the two. A differential lock device C is configured by inserting a ball 21 into the
Further, groove-shaped drive transmission portions 3, 3' are formed on the inner peripheral portions of the large diameter portions A, A'' of the sun gears a, a', and the transmission shafts 1.
A retaining groove 36, 36' is formed on the outer periphery of the clutch body d, d' which is spline-fitted to the clutch body 1'l, and a side clutch is formed between the drive transmitting parts 3, 3' and the engaging groove 36, 36'. A mission structure of a walk-behind cultivator characterized in that a side clutch device or D' is constructed by interposing balls 19, 19'.