JP2566040B2 - Fixed position stop clutch - Google Patents
Fixed position stop clutchInfo
- Publication number
- JP2566040B2 JP2566040B2 JP2112867A JP11286790A JP2566040B2 JP 2566040 B2 JP2566040 B2 JP 2566040B2 JP 2112867 A JP2112867 A JP 2112867A JP 11286790 A JP11286790 A JP 11286790A JP 2566040 B2 JP2566040 B2 JP 2566040B2
- Authority
- JP
- Japan
- Prior art keywords
- cam surface
- rotating body
- clutch
- rotation
- driven rotating
- 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 - Lifetime
Links
Landscapes
- Transplanting Machines (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、作業位置を一定の回転位相で停止すること
ができる定位置停止クラッチに関する。Description: TECHNICAL FIELD The present invention relates to a fixed position stop clutch capable of stopping a work position at a constant rotational phase.
例えば、田植機の植付装置への伝動系に組込まれたク
ラッチ(植付クラッチ)は、植付爪を田面上方の所定位
置まで上昇させた状態で切れることが望ましく、係る機
能を備えたクラッチの一例として、実公昭62−28812号
公報で開示されたものが知られている。For example, it is desirable that a clutch (planting clutch) incorporated in a power transmission system for a planting device of a rice transplanter be disengaged in a state where the planting claw is raised to a predetermined position above the rice field, and a clutch having such a function is provided. As one example, the one disclosed in Japanese Utility Model Publication No. 62-28812 is known.
この公知のクラッチは、駆動回転体と、回転軸心方向
へのスライド移動によって前記駆動回転体とに咬合離脱
する従動回転体と、この従動回転体を咬合側にスライド
付勢するクラッチ入り用のバネと、前記従動回転体の回
転軌跡内に半径方向から進退するクラッチ操作用の牽制
ピンとを備え、前記従動回転体には、位置固定の前記牽
制ピンとの係合状態で従動回転体が一定方向へ回転する
ことによって、該従動回転体を相対的に前記バネに抗し
てクラッチ切り方向に強制スライド変位させる上り傾斜
の螺旋カム面を形成するとともに、この螺旋カム面の後
方部位に、前記牽制ピンの従動回転体中心側への押込み
変位によって該従動回転体を完全クラッチ切り位置まで
スライド変位させる押込みカム面を設けて構成したもの
であり、牽制ピンを従動回転体側に進出させるだけの軽
い操作力でもって、クラッチ切り操作を軽快に行うこと
ができる特徴を有している。This known clutch includes a drive rotating body, a driven rotating body that is engaged with and disengaged from the drive rotating body by sliding movement in the direction of the rotation axis, and a clutch for energizing the driven rotating body to slide on the occlusal side. A spring and a check pin for clutch operation that moves forward and backward in a radial direction within a rotation locus of the driven rotary body are provided, and the driven rotary body has a fixed direction in which the driven rotary body is engaged in a state of engagement with the check pin that is fixed in position. By rotating the driven rotary body against the spring, the spiral cam surface is formed so as to forcibly slide and displace in the clutch disengagement direction, and at the rear portion of the spiral cam surface, the restraint is provided. It is configured by providing a pushing cam surface for slidingly displacing the driven rotating body to the complete clutch disengagement position by pushing displacement of the pin toward the center of the driven rotating body. With a light operating force enough to advance to the dynamic rotary section, it has a feature that can be lightly perform clutch disengaging operation.
そして、このクラッチにおいては、牽制ピン(公報の
ホーク部材)を押込みカム面(公報の第1カム面)に作
用させて駆動回転体(公報の駆動側部材)から完全に離
脱させたクラッチ切り状態で、従動回転体が慣性により
更に回転して、これに備えたストッパー面が位置固定の
牽制ピンに衝合することで従動回転体を一定回転位相で
停止させるよう構成されている。つまり、押込みカム面
に引き続いて設けられているところの手回し回転操作を
許すための平行カム面(公報の第2カム面)の存在範囲
を従動体の慣性回転で移動させるように構成されてい
る。In this clutch, the clutch disengaged state in which the check pin (Hawk member of the publication) is acted on the pushing cam surface (the first cam surface of the publication) to completely disengage it from the driving rotor (the driving side member of the publication) Then, the driven rotary body further rotates due to inertia, and the stopper surface provided on the driven rotary body collides with the check pin for fixing the position, whereby the driven rotary body is stopped in a constant rotation phase. That is, it is configured to move the range of existence of the parallel cam surface (second cam surface of the publication), which is provided subsequent to the pushing cam surface, for permitting the manual rotation operation by inertial rotation of the driven body. .
しかし、上記従来構成の定位置停止クラッチは、完全
切り後に従動回転体が慣性で回転する現象を利用して定
位置停止を行わせるものであるから、従動側における軸
支部や摺動部での抵抗が潤滑不良や部材の摩擦等によっ
て大きくなった場合には慣性回転力が不足してストッパ
ー面が牽制ピンに衝合する手前で従動回転体が停止して
しまうおそれがあった。又、小さな慣性回転力でもスト
ッパー面を牽制ピン衝合させるために、クラッチ完全切
り位相である押込みカム面形成部の後方に近づけてスト
ッパー面を形成すると、慣性力の大きい場合にストッパ
ー面が強力に牽制ピンに衝突してその反動で従動回転体
が逆転し、停止位置がズレるおそれがあり、いずれにせ
よ、慣性回転力の変化によって停止位置に誤差が生じる
欠点があった。However, since the fixed position stop clutch of the above-mentioned conventional structure is used to perform a fixed position stop by utilizing the phenomenon that the driven rotating body rotates due to inertia after complete disengagement, the fixed side stop clutch on the driven side does not When the resistance is increased due to poor lubrication or friction of members, the inertial rotational force is insufficient, and the driven rotor may stop before the stopper surface abuts against the check pin. Also, in order to make the stopper surface collide with the check pin even with a small inertial rotation force, if the stopper surface is formed close to the rear of the pushing cam surface forming part which is the clutch full disengagement phase, the stopper surface is strong when the inertia force is large. In addition, there is a possibility that the driven rotor will reversely rotate due to the collision with the restraint pin and the stop position will shift, and in any case, there will be an error in that the stop position will have an error due to a change in the inertial rotational force.
本発明は、係る型式の定位置停止クラッチの停止位置
精度を高めることを目的とする。It is an object of the invention to improve the stop position accuracy of such a type of fixed position stop clutch.
本発明は、上記目的を達成するために、駆動回転体
と、回転軸心方向へのスライド移動によって前記駆動回
転体とに咬合離脱する従動回転体と、この従動回転体を
咬合側にスライド付勢するクラッチ入り用のバネと、前
記従動回転体の回転軌跡内に半径方向から進退するクラ
ッチ操作用の牽制ピンとを備え、前記従動回転体には、
位置固定の前記牽制ピンとの係合状態で従動回転体が一
定方向へ回転することによって、該従動回転体を相対的
に前記バネに抗してクラッチ切り方向に強制スライド変
位させる上り傾斜の螺旋カム面を形成するとともに、こ
の螺旋カム面の前記一定方向への回転方向下手側部位
に、前記牽制ピンの従動回転体中心側への押込み変位に
よって該従動回転体を完全クラッチ切り位置までスライ
ド変位させる押込みカム面を設け、かつ、この押込みカ
ム面よりも前記一定方向への回転方向下手側部位に、ク
ラッチ切り状態で前記従動回転体の手回し回転を許容す
る平行カム面を周方向に沿って形成してある定位置停止
クラッチにおいて、前記押込みカム面が形成された回転
位相部よりも回転方向下手側で、かつ、前記平行カム面
よりも回転方向上手側位置には、押込み操作された前記
牽制ピンに係合する上り傾斜の回転抑制用カム面を前記
螺旋カム面に連設して形成してある。In order to achieve the above-mentioned object, the present invention provides a drive rotating body, a driven rotating body that is engaged with and disengaged from the drive rotating body by a sliding movement in the direction of the rotation axis, and a driven rotating body that slides on the occlusal side. A spring for energizing the clutch, and a check pin for clutch operation for advancing and retracting from the radial direction within the rotation locus of the driven rotating body, and the driven rotating body,
The driven rotary body rotates in a fixed direction in an engaged state with the check pin that is fixed in position, so that the driven rotary body is forcedly slid in the clutch disengaging direction relatively against the spring, whereby the spiral cam is inclined upward. A surface is formed, and the driven rotor is slid to the complete clutch disengagement position by pushing the check pin toward the center of the driven rotor at the lower side portion of the spiral cam surface in the rotation direction in the certain direction. A pushing cam surface is provided, and a parallel cam surface that allows manual rotation of the driven rotating body in the clutch disengaged state is formed in the circumferential direction at the lower side of the pushing cam surface in the direction of rotation in the fixed direction. In the fixed-position stop clutch that is provided, it is on the rotation direction lower side than the rotation phase portion on which the pushing cam surface is formed and on the rotation direction upper side than the parallel cam surface. The position, the rotation suppression cam surface of the up-ramp for engaging the restraining pin which is pushed is formed by continuously to the helical cam surface.
本発明構成によると、牽制ピンが押込みカム面に作用
して完全クラッチ切り状態になった状態では、牽制ピン
は従動回転体に形成した回転抑制用カム面の低位に位置
し、従動回転体が慣性で回転を続けるには、この上り傾
斜の回転抑制用カム面を牽制ピンが相対的に登ってゆく
必要があり、これが抵抗となって従動回転体は押込みカ
ム面と牽制ピンとが係合した完全クラッチ切り位置で停
止することになる。According to the configuration of the present invention, in the state where the check pin acts on the pushing cam surface and is in the complete clutch disengaged state, the check pin is located at a lower position of the rotation suppressing cam surface formed on the driven rotating body, and the driven rotating body is In order to continue rotation due to inertia, the check pin must relatively climb up the rotation-suppressing cam surface for restraint, and this acts as resistance and the driven rotor engages the push-in cam surface and the check pin. It will stop at the complete clutch disengagement position.
この場合、停止した従動回転体に回転抑制用カム面へ
の乗り越え抵抗より大きい外力を加えれば強制的に従動
回転体、つまり、これに連動連結した作業装置を手回し
操作することが可能である。In this case, if an external force larger than the resistance to jump over the rotation suppressing cam surface is applied to the stopped driven rotating body, the driven driven rotating body, that is, the working device linked to the driven rotating body can be manually rotated.
また、前記回転抑制用カム面の終端から回転方向での
下手側に、前記従動回転体の手回し回転を許容する平行
カム面を周方向に沿って形成してあるから、定位置停止
してからの手回しによる作業装置の回転を、特に大きい
力を要することなく行えるものとなる。Further, since a parallel cam surface that allows manual rotation of the driven rotating body is formed along the circumferential direction on the lower side in the rotation direction from the end of the rotation suppressing cam surface, after stopping at a fixed position. Therefore, the working device can be rotated by hand rotation without requiring a particularly large force.
尚、前記牽制ピンの先端係合部分を先細りのテーパー
コーン状に形成するとともに、前記螺旋カム面、前記押
込みカム面、前記回転抑制用カム面及び平行カム面を、
前記先端係合部分の外周面に周同一傾斜角の傾斜面に構
成すると、牽制ピンが各カム面に線当り、あるいは面当
りして耐久性が向上する。The tip engaging portion of the check pin is formed in a tapered tapered cone shape, and the spiral cam surface, the pushing cam surface, the rotation suppressing cam surface, and the parallel cam surface are
When the outer peripheral surface of the tip engaging portion is formed as an inclined surface having the same inclination angle around the circumference, the check pin comes into line contact with each cam surface, or comes into contact with each cam surface to improve durability.
以上のように、本発明によれば、クラッチ切り時点で
の慣性力の大小に拘らず、従動回転体を一定回転位相に
高い精度で停止させることができるようになった。As described above, according to the present invention, it is possible to stop the driven rotating body at a constant rotation phase with high accuracy regardless of the magnitude of the inertial force at the time of clutch disengagement.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第8図に、本発明の定位置停止クラッチを備えた作業
機の一例である歩行型田植機の全体側面図が示されてい
る。FIG. 8 shows an overall side view of a walk-behind rice transplanter which is an example of a working machine equipped with the fixed-position stop clutch of the present invention.
この歩行型田植機は、前部にエンジン(1)及びミッ
ションケース(2)を装備して左右一対の推進車輪
(3)で走行するよう構成した歩行型自走機体(4)の
後部に、植付ケース(5)、4組のクランク式苗植付機
構(6)、及び苗のせ台(7)等からなる苗植付装置
(8)を連結するとともに、機体下部に整地用のセンタ
ーフロート(9)及び左右一対のサイドフロート(10)
を配備して構成されたものであり、第1図に前記苗付装
置(8)への入力部が、又、第7図に植付装置の伝動構
造が夫々示されている。This walk-behind rice transplanter is equipped with an engine (1) and a mission case (2) in the front part and is configured to run on a pair of left and right propulsion wheels (3) at the rear part of a walk-behind self-propelled vehicle (4). A planting case (5), four sets of crank-type seedling planting mechanisms (6), a seedling planting device (8) consisting of a seedling stand (7), etc. are connected, and a center float for leveling is provided at the bottom of the machine. (9) and a pair of left and right side floats (10)
FIG. 1 shows an input section to the seedling attaching device (8), and FIG. 7 shows a transmission structure of the planting device.
植付ケース(5)は、第7図に示すように、中央2条
の苗植付機構(6)を駆動する中央植付ケース(5a)
と、外側の2条を夫々駆動する左右一対のサイド植付ケ
ース(5b)とをパイプフレーム(5c)で連結して構成し
てあり、この中央植付ケース(5a)が、第1図に示すよ
うに、ミッションケース(2)から後方に延出された伝
動ケース兼用の主パイプフレーム(11)の後端に連結さ
れるとともに、中央植付ケース(5a)の上部に苗のせ台
駆動用ケース(12)が連結されている。The planting case (5) is, as shown in FIG. 7, a central planting case (5a) for driving the central two-row seedling planting mechanism (6).
And a pair of left and right side planting cases (5b) that respectively drive the two outer rows are connected by a pipe frame (5c), and this central planting case (5a) is shown in FIG. As shown, it is connected to the rear end of the main pipe frame (11) that also extends backward from the mission case (2) and also serves as a transmission case, and drives the seedling stand on top of the central planting case (5a). The case (12) is connected.
第1図に示すように、主パイプフレーム(11)内には
エンジン動力を受ける伝動軸(13)が挿通されており、
この伝動軸(13)の後端と、中央植付ケース(5a)の前
部に支承した入力軸(14)とがジャンプクラッチ式の安
全クラッチ(15)を介して連動連結されるとともに、こ
の入力軸(14)と中央2条の植付駆動軸(16)とがベベ
ルギヤ(17)及び植付クラッチとしての定位置停止クラ
ッチ(18)を介して連動連結されている。As shown in FIG. 1, a transmission shaft (13) for receiving engine power is inserted in the main pipe frame (11).
The rear end of this transmission shaft (13) and the input shaft (14) supported on the front part of the central planting case (5a) are interlockingly connected through a jump clutch type safety clutch (15), and The input shaft (14) and the central two-row planting drive shaft (16) are interlockingly coupled via a bevel gear (17) and a fixed position stop clutch (18) as a planting clutch.
そして、この植付駆動軸(16)に伝達された動力が、
チェーン(19)、パイプフレーム(5c)内の中間伝動軸
(20)及びチェーン(21)を介してサイド植付ケース
(5b)の植付駆動軸(22)に分岐伝達されるようになっ
ている。又、中央植付駆動軸(16)の動力が苗のせ台駆
動ケース(12)に伝達されて、苗のせ台横送り用のねじ
軸(23)が駆動されるようになっている。Then, the power transmitted to the planted drive shaft (16) is
It is branched and transmitted to the planting drive shaft (22) of the side planting case (5b) via the chain (19), the intermediate transmission shaft (20) in the pipe frame (5c) and the chain (21). There is. The power of the central planting drive shaft (16) is transmitted to the seedling stand driving case (12) to drive the screw shaft (23) for lateral feeding of the seedling supporting stand.
植付クラッチとしての前記定位置停止クラッチ(18)
は、機体後部の操縦部に備えた操作レバー(24)によっ
て切り操作された際に、苗植付機構(6)を田面から大
きく上方に移動した位置、具体的には、苗のせ台下端の
苗取出し口に突入する少し手前の所定位置で停止する機
能が要求されるものであり、本発明においては、この定
位置停止クラッチ(18)を次のように構成している。The fixed position stop clutch (18) as a planting clutch
Is the position where the seedling planting mechanism (6) has been moved significantly upward from the paddy field when it is cut and operated by the operation lever (24) provided on the control section at the rear of the aircraft, specifically, at the lower end of the seedling stand. It is required to have a function of stopping at a predetermined position just before entering the seedling take-out port. In the present invention, the fixed position stop clutch (18) is configured as follows.
第1図に示すように、この定位置停止クラッチ(18)
は、前記ベベルギヤ(17)に常時咬合して植付駆動軸
(16)に軸心方向位置固定状態で遊嵌したベベルギヤ部
付きの駆動回転体(25)と、植付駆動軸(16)にスライ
ド自在にスプライン外歓した従動回転体(26)とからな
り、駆動回転体(25)の端面に形成した爪(25a)に従
動回転体(16)の端面に形成した爪(26a)とが咬合及
び離脱されることで苗植付装置(8)全体の駆動及び停
止が行われよう構成されている。As shown in FIG. 1, this fixed position stop clutch (18)
Is a drive rotating body (25) with a bevel gear part that is always meshed with the bevel gear (17) and is loosely fitted to the planted drive shaft (16) in a state where the axial center position is fixed, and the planted drive shaft (16). It consists of a driven rotor (26) slidable outside the spline, and a pawl (25a) formed on the end face of the drive rotor (25) and a pawl (26a) formed on the end face of the driven rotor (16). The whole of the seedling planting device (8) is driven and stopped by being engaged and disengaged.
前記従動回転体(16)は、バネ(27)によって爪咬合
側、つまりクラッチ入り側にスライド付勢されており、
中央植付ケース(5a)に半径方向から進退する牽制ピン
(28)との係合によるカム作用で、バネ(27)に抗して
強制後退変位されるようになっている。The driven rotating body (16) is urged to slide by the spring (27) toward the pawl engaging side, that is, the clutch engaged side,
A cam action by engagement with a check pin (28) that advances and retreats from the central planting case (5a) in the radial direction is forcibly retracted and displaced against the spring (27).
前記牽制ピン(28)に作用するクラッチ切り用のカム
が次のように形成されている。第3図ないし第6図に示
すように、従動回転体(26)の外周近くには、牽制ピン
(28)の係入を許す平行カム(29)が周方向に沿って所
定の位相範囲(θ1)にわたって形成されるとともに、
この平行カム面(29)の回転後方に引続いて上り傾斜の
螺旋カム面(30)が所定の位相範囲(θ2)にわたって
形成され、かつ、これら平行カム面(29)及び螺旋カム
面(30)の回転軸心側には牽制ピン(28)の先端を接当
支持する周壁面(31)が形成されている。A clutch disengaging cam that acts on the check pin (28) is formed as follows. As shown in FIGS. 3 to 6, near the outer periphery of the driven rotary body (26), a parallel cam (29) which allows the check pin (28) to be engaged is arranged in a predetermined phase range ( formed over θ 1 ) and
A spiral cam surface (30) having an upward slope is formed over a predetermined phase range (θ 2 ) following the rotation of the parallel cam surface (29), and the parallel cam surface (29) and the spiral cam surface (30) are formed. A peripheral wall surface (31) for supporting the tip of the check pin (28) in abutment is formed on the rotation axis side of (30).
又、螺旋カム面(30)の後端に相当する回転位相部位
(A)において前記周壁面(31)が終了して、牽制ピン
(28)の回転軸心側への進出が許されるとともに、この
回転位相部位(A)における螺旋カム面(30)よりも回
転軸心側の箇所には牽制ピン(28)の進出によって従動
回転体(26)を駆動回転体(25)から離反させる方向
(クラッチ切り方向)に変位させるべく回転軸心側を高
く設定した押込みカム面(32)が形成されている。Further, the peripheral wall surface (31) ends at the rotation phase portion (A) corresponding to the rear end of the spiral cam surface (30), and the check pin (28) is allowed to advance toward the rotation axis. A direction in which the driven rotary body (26) is separated from the drive rotary body (25) by advancing the check pin (28) at a location on the rotary shaft side of the spiral cam surface (30) in the rotary phase portion (A) ( A push-in cam surface (32) is formed with its rotation axis side set high for displacement in the clutch disengagement direction).
更に、前記回転位相部位(A)よりもクラッチ切り操
作時の回転方向下手側には、螺旋カム面(30)に引続く
上り傾斜の回転抑制用カム面(33)が一定の小範囲(θ
3)にわたって形成されている。Further, the rotation suppressing cam surface (33) following the spiral cam surface (30) on the lower side of the rotation phase portion (A) in the rotation direction at the time of clutch disengagement operation has a certain small range (θ).
3 ) is formed.
そして、この回転抑制用カム面(33)の後方には周方
向に沿う平行カム面(34)が一定位相範囲(θ4)にわ
たって形成されるとともに、その終端に接当面(35)が
起立形成されている。A parallel cam surface (34) along the circumferential direction is formed behind the rotation suppressing cam surface (33) over a constant phase range (θ 4 ), and a contact surface (35) is formed upright at the end thereof. Has been done.
又、前記牽制ピン(28)の先端係合部分(28a)は先
細りのテーパーコーン状に形成されるとともに、前記各
カム(29),(30),(32),(33)、及び(34)はこ
の先端係合部分(28a)の外周面に沿う同一傾斜角の傾
斜面に構成されている。Further, the tip engaging portion (28a) of the restraining pin (28) is formed in a tapered taper cone shape, and the cams (29), (30), (32), (33) and (34) are formed. ) Is an inclined surface having the same inclination angle along the outer peripheral surface of the tip engaging portion (28a).
次に、上記定位置停止クラッチ(18)の作動について
説明する。Next, the operation of the fixed position stop clutch (18) will be described.
操作レバー(24)がクラッチ入り位置にあると、該レ
バー(24)にレリーズワイヤ(36)を介して連係された
牽制ピン(28)は進出付勢用のバネ(37)に抗して従動
回転体(26)の回転軌跡外に後退されており、牽制ピン
(28)に係合牽制されない従動回転体(26)はバネ(2
7)によって駆動回転体(25)に付勢咬合されている。When the operating lever (24) is in the clutch engaged position, the check pin (28) linked to the lever (24) via the release wire (36) is driven against the advance biasing spring (37). The driven rotating body (26) which is retracted out of the rotation locus of the rotating body (26) and is not restrained by the restraining pin (28) is a spring (2
It is urged and occluded by the drive rotor (25) by 7).
操作レバー(24)をクラッチ切り位置に操作すると、
レリーズワイヤ(36)が弛められて牽制ピン(28)がバ
ネ(37)によって従動回転体(26)の回転軌跡内に進出
する。When operating the operating lever (24) to the clutch disengagement position,
The release wire (36) is loosened and the restraining pin (28) advances into the rotation locus of the driven rotating body (26) by the spring (37).
進出した牽制ピン(28)は先ず位相範囲(θ1)にお
いて平行カム(29)上に入り込みその先端が周壁面(3
1)で受け止められる。The check pin (28) that has advanced advances into the parallel cam (29) in the phase range (θ 1 ) first , and its tip ends on the peripheral wall surface (3
Taken in 1).
従動回転体(26)の回転に伴って牽制ピン(28)は相
対的に回転位相(θ2)に入り、上り傾斜の螺旋カム面
(30)に係合する。位置固定の牽制ピン(28)に対して
螺旋カム面(30)が回動してゆくことで従動回転体(2
6)は相対的に駆動回転体(25)から離反する方向にス
ライドされる。With the rotation of the driven rotor (26), the check pin (28) relatively enters the rotational phase (θ 2 ) and engages with the upwardly inclined spiral cam surface (30). As the spiral cam surface (30) rotates with respect to the restraining pin (28) whose position is fixed, the driven rotor (2
6) is relatively slid in the direction away from the drive rotor (25).
牽制ピン(28)が相対的に回転位相部位(A)に至る
と、周壁面(31)がなくなって牽制ピン(28)はバネ
(37)によって回転軸心側に押込まれ、押し込みカム面
(32)の働きで従動回転体(26)は、更に駆動回転体
(25)から離反する方向にスライドされて爪(25a),
(26a)同士が離脱する。つまり、完全なクラッチ切り
状態がもたらされる。When the check pin (28) relatively reaches the rotational phase portion (A), the peripheral wall surface (31) disappears and the check pin (28) is pushed toward the rotation axis by the spring (37), and the pushing cam surface ( The driven rotating body (26) is further slid in the direction away from the driving rotating body (25) by the action of 32), and the claws (25a),
(26a) Separate from each other. That is, a completely disengaged state is brought about.
この場合、伝動の断たれた従動回転体(26)は、これ
に連係された各種部品の質量に基づく慣性で更に遊転し
ようとするが、クラッチ切り位相である前記回転位相部
位(A)の前記回転方向下手側には上り傾斜の回転抑制
用カム面(33)が存在して慣性回転を阻止する抵抗が与
えられているため、従動回転体(26)はこの回転位相部
位(A)で停止する。この時、苗植付装置(6)は第2
図に示す状態にある。In this case, the driven rotary body (26) whose transmission has been cut off tries to further idle due to the inertia based on the mass of various parts linked thereto, but the rotation phase portion (A) which is the clutch disengagement phase. On the lower side in the rotation direction, there is a cam surface (33) for upward rotation, which suppresses inertial rotation, so that the driven rotating body (26) has a rotation phase portion (A). Stop. At this time, the seedling planting device (6) is the second
It is in the state shown in the figure.
又、この定位置停止状態において、前記回転抑制カム
面(33)による回転抵抗に打勝つ力で苗植付機構(6)
を手回し操作すると、牽制ピン(28)は相対的に平行カ
ム面(34)上に乗り上がり、以後は牽制ピン(28)に接
当面(35)が接触するまで抵抗少なく従動回転体(26)
を前進回動させることができ、苗植付機構(6)の植付
爪(6a)先端を苗のせ台(7)の下端取出し口(7a)に
セットしたゲージブロックに近づける際の手回しが容易
に行える。Further, in this fixed position stopped state, the seedling planting mechanism (6) is provided with a force that overcomes the rotation resistance of the rotation suppressing cam surface (33).
When the handwheel is operated, the restraint pin (28) relatively climbs up on the parallel cam surface (34), and thereafter, the resistance is low until the contact surface (35) contacts the restraint pin (28), and the driven rotating body (26).
Can be rotated forward and the tip of the planting claw (6a) of the seedling planting mechanism (6) can be easily rotated when brought close to the gauge block set in the lower end outlet (7a) of the seedling stand (7). You can do it.
そして、上記のように各カム面(29),(30),(3
2),(33)及び(34)が牽制ピン(28)に係合摺接す
る際の接触はテーパーコーンの外周面に沿う線当りとな
るため、摩擦に対する耐久性が高いものとなっている。Then, as described above, each cam surface (29), (30), (3
When the sliding pins (28), (2), (33) and (34) are in sliding contact with each other, the contact is line contact along the outer peripheral surface of the taper cone, and therefore the durability against friction is high.
尚、前記牽制ピン(28)はストレートピンでもよく、
この場合は押込みカム面(32)のみが回転軸心側が高い
傾斜面となる。The restraint pin (28) may be a straight pin,
In this case, only the pushing cam surface (32) has a high inclined surface on the rotation axis side.
尚、特許請求の範囲の項に図面との対照を便利にする
為に記号を記すが、該記入により本発明は添付図面の構
造に限定されるものではない。It should be noted that although symbols are added to the claims for convenience of comparison with the drawings, the present invention is not limited to the structure of the accompanying drawings by the entry.
図面は本発明に係る定位置停止クラッチの実施例を示
し、第1図は伝動部要部の横断平面図、第2図は定位置
停止状態を示す要部の側面図、第3図はクラッチを構成
する従動回転体の斜視図、第4図はその側面図、第5図
はその正面図、第6図はそのカム面の展開側面図、第7
図は苗植付装置の伝動構造を示す縦断展開正面図、第8
図は歩行型田植機の全体側面図である。 (25)……駆動回転体、(26)……従動回転体、(27)
……バネ、(28)……牽制ピン、(30)……螺旋カム
面、(32)……押込みカム面、(33)……回転抑制用カ
ム面、(34)……平行カム面、(35)……接当面、
(A)……回転位相部位。The drawings show an embodiment of a fixed-position stop clutch according to the present invention. Fig. 1 is a cross-sectional plan view of a main part of a transmission portion, Fig. 2 is a side view of the main part showing a fixed-position stopped state, and Fig. 3 is a clutch. 4 is a side view thereof, FIG. 5 is a front view thereof, and FIG. 6 is a developed side view of a cam surface thereof.
The figure shows the front elevational view showing the transmission structure of the seedling planting equipment, No. 8
The figure is an overall side view of the walk-behind rice transplanter. (25) …… Drive rotor, (26) …… Driven rotor, (27)
...... Spring, (28) …… Control pin, (30) …… Spiral cam surface, (32) …… Pushing cam surface, (33) …… Rotation suppression cam surface, (34) …… Parallel cam surface, (35) …… For the time being,
(A) ... Rotation phase part.
Claims (3)
ライド移動によって前記駆動回転体(25)に咬合離脱す
る従動回転体(26)と、この従動回転体(26)を咬合側
にスライド付勢するクラッチ入り用のバネ(27)と、前
記従動回転体(26)の回転軌跡内に半径方向から進退す
るクラッチ操作用の牽制ピン(28)とを備え、前記従動
回転体(26)には、位置固定の前記牽制ピン(28)との
係合状態で従動回転体(26)が一定方向へ回転すること
によって、該従動回転体(26)を相対的に前記バネ(2
7)に抗してクラッチ切り方向に強制スライド変位させ
る上り傾斜の螺旋カム面(30)を形成するとともに、こ
の螺旋カム面(30)の前記一定方向への回転方向下手側
部位に、前記牽制ピン(28)の従動回転体中心側への押
込み変位によって該従動回転体(26)を完全クラッチ切
り位置までスライド変位させる押込みカム面(32)を設
け、かつ、この押込みカム面(32)よりも前記一定方向
への回転方向下手側部位に、クラッチ切り状態で前記従
動回転体(26)の手回し回転を許容する平行カム面(3
4)を周方向に沿って形成してある定位置停止クラッチ
において、前記押込みカム面(32)が形成された回転位
相部(A)よりも回転方向下手側で、かつ、前記平行カ
ム面(34)よりも回転方向上手側位置には、押込み操作
された前記牽制ピン(28)に係合する上り傾斜の回転抑
制用カム面(33)を前記螺旋カム面(30)に連設して形
成してあることを特徴とする定位置停止クラッチ。1. A drive rotating body (25), a driven rotating body (26) which is engaged with and disengaged from the drive rotating body (25) by sliding movement in the direction of the rotation axis, and the driven rotating body (26) is engaged with the driven rotating body (26). The driven rotating body is provided with a clutch-engaging spring (27) for slidingly biasing the driven side, and a clutch operation restraining pin (28) moving forward and backward in a radial direction within a rotation locus of the driven rotating body (26). The driven rotating body (26) is rotated in a certain direction in an engaged state with the check pin (28) whose position is fixed, so that the driven rotating body (26) relatively moves to the spring (26). 2
7) A spiral cam surface (30) with an upward inclination is formed to forcibly slide and displace in the clutch disengagement direction against 7), and at the same time the spiral cam surface (30) is rotated downward in the certain direction, the check restraint is provided. A pushing cam surface (32) for slidingly displacing the driven rotating body (26) to the completely clutch disengaged position by pushing displacement of the pin (28) toward the center of the driven rotating body is provided, and from this pushing cam surface (32) Also on the lower side portion in the direction of rotation in the fixed direction, a parallel cam surface (3) that allows manual rotation of the driven rotating body (26) in the clutch disengaged state.
In a fixed position stop clutch in which 4) is formed along the circumferential direction, the parallel cam surface () is located on the rotation direction lower side than the rotation phase portion (A) on which the pushing cam surface (32) is formed. A rotation suppressing cam surface (33) which engages with the check pin (28) that has been pushed in is connected to the spiral cam surface (30) at a position on the rotation direction upper side than that of 34). A fixed-position stop clutch characterized by being formed.
a)を先細りのテーパーコーン状に形成するとともに、
前記螺旋カム面(30)、前記押込みカム面(32)、前記
回転抑制用カム面(33)及び平行カム面(34)を、前記
先端係合部分(28a)の外周面に沿う同一傾斜角の傾斜
面に構成してある請求項1記載の定位置停止クラッチ。2. A tip engaging portion (28) of the check pin (28).
a) is formed into a tapered cone shape,
The spiral cam surface (30), the pushing cam surface (32), the rotation suppressing cam surface (33), and the parallel cam surface (34) have the same inclination angle along the outer peripheral surface of the tip engaging portion (28a). The fixed-position stop clutch according to claim 1, wherein the fixed-position stop clutch is formed as an inclined surface.
ン(28)に作用する手回し範囲制限用の接当面(35)を
起立形成してある請求項1または2記載の定位置停止ク
ラッチ。3. A fixed position stop according to claim 1, wherein a contact surface (35) for limiting a hand-turning range that acts on the check pin (28) is formed upright at the end of the parallel cam surface (34). clutch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2112867A JP2566040B2 (en) | 1990-04-27 | 1990-04-27 | Fixed position stop clutch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2112867A JP2566040B2 (en) | 1990-04-27 | 1990-04-27 | Fixed position stop clutch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0411807A JPH0411807A (en) | 1992-01-16 |
JP2566040B2 true JP2566040B2 (en) | 1996-12-25 |
Family
ID=14597518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2112867A Expired - Lifetime JP2566040B2 (en) | 1990-04-27 | 1990-04-27 | Fixed position stop clutch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2566040B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105864308B (en) * | 2016-05-17 | 2017-12-26 | 浙江小精农机制造有限公司 | Safety clutch integral type transplanting mechanism actuating unit and method |
CN114532016B (en) * | 2022-03-17 | 2022-10-28 | 江苏玖顺农业机械有限公司 | Intelligent seedling separating mechanism of high-speed rice transplanter |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61120337U (en) * | 1985-01-14 | 1986-07-29 |
-
1990
- 1990-04-27 JP JP2112867A patent/JP2566040B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0411807A (en) | 1992-01-16 |
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