JP2009262871A - Power transmission device for working vehicle - Google Patents

Power transmission device for working vehicle Download PDF

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JP2009262871A
JP2009262871A JP2008117697A JP2008117697A JP2009262871A JP 2009262871 A JP2009262871 A JP 2009262871A JP 2008117697 A JP2008117697 A JP 2008117697A JP 2008117697 A JP2008117697 A JP 2008117697A JP 2009262871 A JP2009262871 A JP 2009262871A
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transmission
traveling
gear
braking
power
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Takashi Funo
隆 布野
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Mitsubishi Agricultural Machinery Co Ltd
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Mitsubishi Agricultural Machinery Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To surely stop a machine body by interlocking turn-on operation of a braking mechanism with turn-off operation of a main clutch. <P>SOLUTION: This power transmission device for working machine comprises: an input shaft 27; a travelling side power transmitting mechanism 31 for connecting/disconnecting and shifting power from the input shaft 27 side to a travelling side, which makes the machine body travel, by changing or releasing engagement of speed change gears 48, 49, 52 and 53 by moving them on a shift shaft 32 in the axial direction; a working side power transmitting mechanism for transmitting power from the input shaft 27 to a working machine coupled to the machine body; a main clutch mechanism 26 for connecting/disconnecting power from an engine side to the input shaft 27; a braking mechanism 54 for braking a travelling section; and a clutch side interlocking mechanism 56 for interlocking turn-on operation of the braking mechanism 54 with turn-off operation of the main clutch mechanism 26. The braking mechanism 54 can be held in the turn-on condition in turn-off operation of the main clutch mechanism 26. A travelling side interlocking mechanism 57, which turns on the braking mechanism 54 with turn-off operation of the travelling side power transmitting mechanism 31, and the braking mechanism 54 are provided on the shift shaft 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、エンジンからの動力を、機体を走行させる走行部側と、機体に連結される作業機側とに分岐して伝動する作業車両の伝動装置に関する。   The present invention relates to a transmission device for a work vehicle in which power from an engine is branched and transmitted to a traveling unit side for traveling the vehicle body and a work machine side connected to the vehicle body.

エンジンからの動力によって回転駆動される入力軸と、変速軸上を軸方向に移動して変速ギヤの噛合いを変更又は解除することにより入力軸側から機体を走行させる走行部側への動力の断続及び変速を行なう走行側伝動機構と、入力軸からの動力を機体に連結される作業機に伝動する作業側伝動機構と、エンジン側から入力軸への動力の断続を行なう主クラッチ機構と、走行部を制動する制動機構と、前記クラッチ機構の切作動に制動機構の入作動を連動させる連動機構とを備えた特許文献1に示す作業車両の伝動装置が公知になっている。   The input shaft that is rotationally driven by the power from the engine and the power from the input shaft side to the traveling unit side that travels the fuselage by moving in the axial direction on the transmission shaft and changing or releasing the meshing of the transmission gear. A traveling side transmission mechanism that performs intermittent and shifting, a working side transmission mechanism that transmits power from the input shaft to a working machine connected to the airframe, a main clutch mechanism that intermittently transmits power from the engine side to the input shaft, 2. Description of the Related Art A transmission device for a work vehicle shown in Patent Document 1 that includes a braking mechanism that brakes a traveling unit and an interlocking mechanism that interlocks an on / off operation of the braking mechanism with a turning-off operation of the clutch mechanism is known.

特許文献1に示す作業車両の伝動装置は、主クラッチ機構を切操作すると連動機構により制動機構が入作動されるため、機体を確実に停止せしめることが可能になるというメリットがある一方で、機体を停止させた状態で作業機を駆動させて各種点検やメンテナンス等を行なうために、主クラッチ機構を入操作するとともに走行変速機構を切操作すると、主クラッチ機構の入操作に伴って制動機構が切作動されるため、平坦でない場所では傾斜方向に向かって機体が動いてしまい、上記各種点検やメンテナンス等を正確に行なうことが困難になるという欠点を有する。   The transmission device for a work vehicle shown in Patent Document 1 has an advantage that when the main clutch mechanism is turned off, the brake mechanism is turned on and operated by the interlocking mechanism. When the main clutch mechanism is turned on and the traveling speed change mechanism is turned off in order to perform various inspections, maintenance, etc. by driving the work machine in a state in which the brake is stopped, the braking mechanism is moved along with the turning operation of the main clutch mechanism. Since the cutting operation is performed, the airframe moves in an inclined direction in a non-flat place, and it is difficult to accurately perform the above various inspections and maintenance.

上記欠点に対して、主クラッチ機構の入状態時に制動機構の入状態を保持できる特許文献2に示す作業車両の伝動装置が公知になっている。
特開2006−240343号公報 特開2005−104299号公報
With respect to the above-described drawbacks, a transmission device for a work vehicle shown in Patent Document 2 that can keep the brake mechanism engaged when the main clutch mechanism is engaged is known.
JP 2006-240343 A JP 2005-104299 A

しかし、特許文献2の作業車両の伝動装置は、ミッションケース内の主クラッチ機構とミッションケース後方(ミッションケースから離れた箇所)に配置されたリヤアクスルケース内の制動機構とを連動機構によって連動させるとともに該連動機構に制動機構の入状態を保持するブレーキ保持手段を設けることにより、主クラッチ機構の入状態時に制動機構の入状態を保持させるため、構造をシンプル且つコンパクトに構成することが困難であるという課題がある。
本発明は、上記課題を解決し、エンジン動力を走行部側と作業機側に分岐して伝動するにあたり、主クラッチの切操作に制動機構の入操作を連動させて機体を確実に停止せしめることが可能であるとともに傾斜地等の平坦でない場所でも機体を停止させて作業機を駆動させることが可能な作業車両の伝動装置において、その構造がシンプル且つコンパクトに構成された作業車両の伝動装置を提供することを目的とする。
However, the transmission device for a work vehicle disclosed in Patent Document 2 interlocks the main clutch mechanism in the transmission case with the braking mechanism in the rear axle case disposed behind the transmission case (a part away from the transmission case) by an interlocking mechanism. Since the interlocking mechanism is provided with a brake holding means for holding the brake mechanism in the engaged state, the brake mechanism is held in the engaged state when the main clutch mechanism is in the engaged state, and thus it is difficult to make the structure simple and compact. There is a problem.
The present invention solves the above-mentioned problem, and when the engine power is branched and transmitted to the traveling unit side and the work machine side, the operation of the braking mechanism is interlocked with the disengagement operation of the main clutch to surely stop the airframe. Provided is a work vehicle transmission device that is capable of stopping the machine body and driving the work machine even in uneven places such as slopes, and the work vehicle transmission device is simple and compact in structure. The purpose is to do.

上記課題を解決するため本発明の作業車両の伝動装置は、第1に、エンジン7からの動力によって回転駆動される入力軸27と、変速軸32上を軸方向に移動して変速ギヤ48,49,52,53の噛合いを変更又は解除することにより入力軸27側から機体3を走行させる走行部1,2側への動力の断続及び変速を行なう走行側伝動機構31と、入力軸27からの動力を機体3に連結される作業機6に伝動する作業側伝動機構28と、エンジン7側から入力軸27への動力の断続を行なう主クラッチ機構26と、走行部1,2を制動する制動機構54と、前記主クラッチ機構26の切作動に制動機構54の入作動を連動させるクラッチ側連動機構56とを備え、主クラッチ機構26の入状態時に制動機構54の入状態を保持できる作業車両の伝動装置において、走行側伝動機構31の切作動に伴って制動機構54を入作動させる走行側連動機構57及び前記制動機構54を変速軸32に設けたことを特徴としている。   In order to solve the above-described problems, the transmission device for a work vehicle according to the present invention firstly includes an input shaft 27 that is rotationally driven by power from the engine 7 and a transmission gear 48 that moves in the axial direction on the transmission shaft 32. By changing or releasing the meshing of 49, 52, 53, a traveling side transmission mechanism 31 that performs intermittent power transmission and shifting from the input shaft 27 side to the traveling unit 1, 2 side that causes the vehicle body 3 to travel, and the input shaft 27 The work side transmission mechanism 28 that transmits the power from the engine 7 to the work machine 6 connected to the machine body 3, the main clutch mechanism 26 that interrupts the power from the engine 7 side to the input shaft 27, and the traveling units 1 and 2 are braked. And a clutch-side interlock mechanism 56 that interlocks the engagement operation of the brake mechanism 54 with the disengagement operation of the main clutch mechanism 26, and can maintain the engaged state of the brake mechanism 54 when the main clutch mechanism 26 is engaged. Work vehicle In transmission, it is characterized in that a driving side transmission mechanism 31 off the brake mechanism 54 by the actuation input operation is to run side interlocking mechanism 57 and the brake mechanism 54 to the transmission shaft 32.

第2に、走行側伝動機構31の切作動に伴うギヤ53,61の噛合いにより走行部1,2が制動されるように制動機構54及び走行側連動機構57を構成したことを特徴としている。   Second, the braking mechanism 54 and the traveling side interlocking mechanism 57 are configured so that the traveling units 1 and 2 are braked by the meshing of the gears 53 and 61 accompanying the turning operation of the traveling side transmission mechanism 31. .

第3に、主クラッチ機構26の切作動に伴う摩擦板66a,67aの当接により走行部1,2が制動されるように制動機構54及びクラッチ側連動機構56を構成したことを特徴としている。   Third, the braking mechanism 54 and the clutch-side interlocking mechanism 56 are configured so that the traveling units 1 and 2 are braked by the contact of the friction plates 66a and 67a when the main clutch mechanism 26 is turned off. .

以上のように構成される作業車両の伝動装置によれば、走行側伝動機構の切作動に伴って制動機構を入作動させる走行側連動機構及び制動機構を変速軸に設け、制動機構、クラッチ側連動機構及び走行側連動機構が入力軸及び変速軸側に集中配置されるため、ミッションケース内の主クラッチ機構とミッションケース後方のリヤアクスルケース内の制動機構とを連動機構によって連動させるとともに該連動機構に制動機構の入状態を保持するブレーキ保持手段を設けたものと比較して、構造をシンプル且つコンパクトに構成でき、製造コストを低く抑えることが可能になるという効果がある。   According to the transmission device of the work vehicle configured as described above, the traveling-side interlocking mechanism and the braking mechanism that turn on and operate the braking mechanism in accordance with the turning-off operation of the traveling-side transmission mechanism are provided on the transmission shaft, and the braking mechanism, the clutch side Since the interlocking mechanism and the traveling-side interlocking mechanism are concentratedly arranged on the input shaft and the transmission shaft side, the main clutch mechanism in the transmission case and the braking mechanism in the rear axle case behind the transmission case are interlocked by the interlocking mechanism and the interlocking mechanism. Compared to the case where the brake holding means for holding the brake mechanism is provided, the structure can be made simple and compact, and the manufacturing cost can be reduced.

また、走行側伝動機構の切作動に伴うギヤの噛合いにより走行部が制動されるように制動機構及び走行側連動機構を構成することにより、制動機構及び走行側連動機構をコンパクトに構成できるという効果がある。   In addition, the braking mechanism and the traveling side interlocking mechanism can be configured compactly by configuring the braking mechanism and the traveling side interlocking mechanism so that the traveling part is braked by the meshing of the gear accompanying the turning operation of the traveling side transmission mechanism. effective.

さらに、主クラッチ機構の切作動に伴う摩擦板の当接により走行部が制動されるように制動機構及びクラッチ側連動機構を構成することにより、ペダル式操作具等から主クラッチ機構を切操作する際は走行部が徐々に制動されるため、機体の急停車を防止できるという効果がある。   Further, the main clutch mechanism is turned off from a pedal-type operation tool or the like by configuring the brake mechanism and the clutch-side interlocking mechanism so that the running portion is braked by the contact of the friction plate accompanying the turning operation of the main clutch mechanism. In this case, since the traveling part is gradually braked, there is an effect that it is possible to prevent the vehicle from suddenly stopping.

以下、図示する例に基づき、本発明の実施形態について説明する。
図1は、本発明の作業車両の伝動装置を適用した乗用田植機の全体側面図である。本乗用田植機(移植機,乗用移植機)は、走行部である左右一対の前輪1,1及び後輪2,2によって支持される走行機体(機体)3と、走行機体3の後端部にリンク機構4を介して昇降駆動可能に連結される植付作業機(作業機)6とを備えている。
Embodiments of the present invention will be described below based on the illustrated example.
FIG. 1 is an overall side view of a riding rice transplanter to which a transmission device for a work vehicle according to the present invention is applied. The passenger rice transplanter (transplanter, passenger transplanter) includes a traveling machine body (machine body) 3 supported by a pair of left and right front wheels 1, 1 and rear wheels 2, which are traveling parts, and a rear end portion of the traveling machine body 3. And a planting work machine (working machine) 6 connected to be movable up and down via a link mechanism 4.

走行機体3におけるエンジン7(図2参照)が収容されたボンネット8後方には、オペレータが着座する座席9を備えた操縦部11が設置されている。植付作業機6は、苗載せ台12及び苗載せ台12下方の配置された植付部13を備えており、苗載せ台12に載置した苗を植付部13により掻き取って圃場に植付ける。座席9に着座したオペレータは、前後輪1,2を駆動させて機体を走行させながら、植付作業機6の植付部13により圃場への苗の植付作業を行なう。   A control unit 11 including a seat 9 on which an operator is seated is installed behind the hood 8 in which the engine 7 (see FIG. 2) of the traveling machine body 3 is accommodated. The planting machine 6 includes a seedling platform 12 and a planting unit 13 disposed below the seedling platform 12, and the seedlings placed on the seedling platform 12 are scraped off by the planting unit 13 into the field. Plant. The operator seated on the seat 9 performs planting work of seedlings on the field by the planting unit 13 of the planting work machine 6 while driving the front and rear wheels 1 and 2 and running the machine body.

図2は、本乗用田植機の動力伝動系統図である。エンジン7で発生させた回転動力は、伝動装置14を介して、前後輪1,2及び植付作業機6等に伝動される。伝動装置14は、エンジン7からの動力が入力される油圧式無段階変速機であるHST16と、HST16で無段階変速された動力が入力されるミッションケース17内の動力伝動機構18と、動力伝動機構18からの動力を前輪1,1に伝動するフロントアクスルケース19,19内の前輪伝動機構21,21と、動力伝動機構18からの動力を後輪2,2に伝動するリヤアクスルケース22内の後輪伝動機構23とを備えている。   FIG. 2 is a power transmission system diagram of the passenger rice transplanter. The rotational power generated by the engine 7 is transmitted to the front and rear wheels 1 and 2 and the planting work machine 6 through the transmission device 14. The transmission device 14 includes a HST 16 that is a hydraulic stepless transmission to which power from the engine 7 is input, a power transmission mechanism 18 in a transmission case 17 to which power continuously variable by the HST 16 is input, and power transmission. Front wheel transmission mechanisms 21 and 21 in the front axle cases 19 and 19 that transmit power from the mechanism 18 to the front wheels 1 and 1, and a rear axle case 22 that transmits power from the power transmission mechanism 18 to the rear wheels 2 and 2 And a rear wheel transmission mechanism 23.

HST16内で変速伝動された動力が出力されるモータ軸(出力軸)24が動力伝動機構18に動力を伝動するミッション伝動軸になっている。ミッション伝動軸24の動力は、主クラッチ(主クラッチ機構)26を介して、入力軸(分岐軸)27に断続伝動される。入力軸27の回転動力は、作業変速部(作業側伝動機構)28を介して作業伝動軸29に変速伝動される一方で、走行変速部(走行側伝動機構)31を介して変速軸32に変速伝動される。   A motor shaft (output shaft) 24 to which power transmitted in the HST 16 is output is a transmission shaft that transmits power to the power transmission mechanism 18. The power of the transmission shaft 24 is intermittently transmitted to the input shaft (branch shaft) 27 via the main clutch (main clutch mechanism) 26. The rotational power of the input shaft 27 is transmitted to the work transmission shaft 29 through the work transmission section (work-side transmission mechanism) 28, while being transmitted to the transmission shaft 32 through the traveling transmission section (travel-side transmission mechanism) 31. Shift transmission.

作業伝動軸29の動力は、ミッションケース17外の作業PTO軸33及び一対のユニバーサルジョイント34,36等を介して、植付作業機6に入力される。植付作業機6に入力された動力は、植付伝動軸37に伝動され、前述の植付部13を駆動させる。   The power of the work transmission shaft 29 is input to the planting work machine 6 through the work PTO shaft 33 outside the mission case 17 and the pair of universal joints 34 and 36. The power input to the planting machine 6 is transmitted to the planting transmission shaft 37 to drive the planting unit 13 described above.

変速軸32は、走行変速軸32と一体回転するギヤ38及びこのギヤ38と常時噛合うギヤ39を介して、ギヤ39と一体回転する走行伝動軸41に伝動される。走行伝動軸41の回転動力は、差動機構42を介して左右のフロントアクスルケース19,19内の前輪伝動機構21,21にそれぞれ伝動されるとともに、伝動軸43を介して、リヤアクスルケース22内で伝動軸44に伝動される。後輪伝動機構23の一部を構成する上記伝動軸44の動力は、左右のサイドクラッチ(サイドクラッチ機構)46,46を介して、左右の後輪2,2にそれぞれ断続伝動される。   The transmission shaft 32 is transmitted to a traveling transmission shaft 41 that rotates integrally with the gear 39 via a gear 38 that rotates integrally with the traveling transmission shaft 32 and a gear 39 that always meshes with the gear 38. Rotational power of the travel transmission shaft 41 is transmitted to the front wheel transmission mechanisms 21 and 21 in the left and right front axle cases 19 and 19 via the differential mechanism 42, and in the rear axle case 22 via the transmission shaft 43. Is transmitted to the transmission shaft 44. The power of the transmission shaft 44 constituting a part of the rear wheel transmission mechanism 23 is intermittently transmitted to the left and right rear wheels 2 and 2 via left and right side clutches (side clutch mechanisms) 46 and 46, respectively.

次に、図3及び4に基づき、入力軸27から変速軸32への伝動手段及び変速軸32の制動手段について詳述する。
図3は、ミッションケース内の要部動力伝動系統図であり、図4は、ミッションケース内の要部展開図である。ミッション伝動軸24の同心軸上には、ミッション伝動軸24外周を覆う筒状に形成された前述の入力軸27が回転自在に軸支されるとともに、ミッション伝動軸24と一体回転し且つミッション伝動軸24の軸方向に移動可能な筒状のクラッチケース47が外装される。
Next, the transmission means from the input shaft 27 to the transmission shaft 32 and the braking means of the transmission shaft 32 will be described in detail with reference to FIGS.
FIG. 3 is a main part power transmission system diagram in the mission case, and FIG. 4 is a main part development view in the mission case. On the concentric shaft of the transmission shaft 24, the aforementioned input shaft 27 formed in a cylindrical shape covering the outer periphery of the transmission shaft 24 is rotatably supported, and rotates together with the transmission shaft 24 and transmits the transmission. A cylindrical clutch case 47 that can move in the axial direction of the shaft 24 is covered.

クラッチケース47内周における主軸26外周と対向する箇所及び入力軸27外周におけるクラッチケース内周と対向する箇所には多数の摩擦板が突出形成されており、これらの摩擦板によって前述の主クラッチ26を構成している。クラッチケース47をミッション伝動軸24の軸方向における一方側に移動させることにより、入力軸27の摩擦板にクラッチケース47の摩擦板が押圧され、主クラッチ26が入作動してミッション伝動軸24の動力が入力軸27に回転伝動される。一方、クラッチケース47をミッション伝動軸24の軸方向における他方側に移動させることにより、入力軸27の摩擦板からクラッチケース47の摩擦板が離間し、主クラッチ26が切作動してミッション伝動軸24から入力軸27への動力伝動が遮断される。   A large number of friction plates protrude from the outer periphery of the main shaft 26 on the inner periphery of the clutch case 47 and the outer periphery of the input shaft 27 opposite to the inner periphery of the clutch case. Is configured. By moving the clutch case 47 to one side in the axial direction of the transmission shaft 24, the friction plate of the clutch case 47 is pressed against the friction plate of the input shaft 27, and the main clutch 26 is engaged and actuated. Power is rotationally transmitted to the input shaft 27. On the other hand, by moving the clutch case 47 to the other side in the axial direction of the transmission shaft 24, the friction plate of the clutch case 47 is separated from the friction plate of the input shaft 27, and the main clutch 26 is turned off to operate the transmission shaft. The power transmission from 24 to the input shaft 27 is interrupted.

主軸24には、主軸24と一体回転する高速ギヤ(変速ギヤ)48及び低速ギヤ(変速ギヤ)49が固定設置されている。一方、変速軸32には変速軸32と一体回転するシフタギヤ51が軸方向に移動可能に支持されており、このシフタギヤ51には上記高速ギヤ48に噛合い可能な小径ギヤ(変速ギヤ)52及び上記低速ギヤ49に噛合い可能な大径ギヤ(ギヤ,変速ギヤ,第1制動ギヤ)53が一体的に設けられている。   A high speed gear (transmission gear) 48 and a low speed gear (transmission gear) 49 that rotate integrally with the main shaft 24 are fixedly installed on the main shaft 24. On the other hand, a shifter gear 51 that rotates integrally with the transmission shaft 32 is supported on the transmission shaft 32 so as to be movable in the axial direction. The shifter gear 51 has a small-diameter gear (transmission gear) 52 that can mesh with the high-speed gear 48. A large-diameter gear (gear, transmission gear, first braking gear) 53 that can mesh with the low-speed gear 49 is integrally provided.

そして、上記高速ギヤ48、低速ギヤ49、小径ギヤ52及び大径ギヤ53等により前述の走行変速部31を構成している。この走行変速部31は、シフタギヤ51を変速軸51の軸方向に移動させて高速ギヤ48に小径ギヤ52が噛合う状態にすることにより、入力軸27の動力を変速軸32に高速伝動する高速状態への切換を行ない、シフタギヤ51を変速軸51の軸方向に移動させて低速ギヤ49に大径ギヤ53が噛合う状態にすることにより、入力軸27の動力を変速軸32に低速伝動する低速状態への切換を行ない、シフタギヤ51を変速軸51の軸方向に移動させて高速ギヤ48と小径ギヤ52の噛合い及び低速ギヤ49と大径ギヤ53の噛合いを解除することにより、入力軸27の動力を変速軸32に伝動させないニュートラル状態への切換を行なうように構成されている。すなわち、走行変速部31によって、ミッション伝動軸24(入力軸27)から前後輪1,2への動力の断続及び変速を行なうことができる。   The high-speed gear 48, the low-speed gear 49, the small-diameter gear 52, the large-diameter gear 53, and the like constitute the traveling transmission unit 31 described above. The traveling transmission unit 31 moves the shifter gear 51 in the axial direction of the transmission shaft 51 so that the small-diameter gear 52 is engaged with the high-speed gear 48, thereby transmitting the power of the input shaft 27 to the transmission shaft 32 at a high speed. By switching to the state, the shifter gear 51 is moved in the axial direction of the transmission shaft 51 so that the large-diameter gear 53 is engaged with the low-speed gear 49, whereby the power of the input shaft 27 is transmitted to the transmission shaft 32 at a low speed. By switching to the low speed state, the shifter gear 51 is moved in the axial direction of the transmission shaft 51 to release the engagement between the high speed gear 48 and the small diameter gear 52 and the engagement between the low speed gear 49 and the large diameter gear 53. The shaft 27 is configured to switch to a neutral state in which the power of the shaft 27 is not transmitted to the transmission shaft 32. That is, the traveling transmission unit 31 can perform intermittent power transmission and transmission from the transmission shaft 24 (input shaft 27) to the front and rear wheels 1 and 2.

上記変速軸32上(変速軸32及び入力軸27上)には変速軸32を制動することにより前後輪1,2を制動する制動機構54が設けられている。この制動機構54は、主クラッチ26の切作動に伴って入力軸27上のクラッチ側連動機構56により入作動されるとともに、変速軸52上の走行側連動機構57により走行変速部31のニュートラル状態への切換作動(切作動)に伴って入作動される。   A braking mechanism 54 that brakes the front and rear wheels 1 and 2 by braking the transmission shaft 32 is provided on the transmission shaft 32 (on the transmission shaft 32 and the input shaft 27). The braking mechanism 54 is turned on by the clutch-side interlocking mechanism 56 on the input shaft 27 as the main clutch 26 is disengaged, and the traveling state of the traveling transmission unit 31 is neutralized by the traveling-side interlocking mechanism 57 on the transmission shaft 52. The operation is switched on in conjunction with the switching operation to (switching operation).

制動機構54は、上記シフタギヤ51の第1制動ギヤ53と、変速軸32と一体回転するように変速軸32に取付固定された第2制動ギヤ58及び第3制動ギヤ59とを備えており、入力軸27(ミッション伝動軸24)側に、走行変速部31のニュートラル状態時に第1制動ギヤ53と噛合う第1遊転ギヤ(ギヤ)61と、第2制動ギヤ58と常時噛合う第2遊転ギヤ62と、第3制動ギヤ58と常時噛合う第3遊転ギヤ63とが設けられている。なお、走行変速部31がニュートラル以外の状態では、第1制動ギヤ53と第1遊転ギヤ61との噛合いが解除される。   The braking mechanism 54 includes a first braking gear 53 of the shifter gear 51, and a second braking gear 58 and a third braking gear 59 that are attached and fixed to the transmission shaft 32 so as to rotate integrally with the transmission shaft 32. A first idler gear (gear) 61 that meshes with the first brake gear 53 and a second brake gear 58 that always meshes with the input shaft 27 (mission transmission shaft 24) side when the traveling transmission unit 31 is in the neutral state. An idle gear 62 and a third idle gear 63 that always meshes with the third brake gear 58 are provided. Note that when the traveling transmission unit 31 is in a state other than neutral, the meshing between the first braking gear 53 and the first idle gear 61 is released.

第1遊転ギヤ61及び第2遊転ギヤ62は、入力軸27の外周に回転自在な状態(遊転状態)で外装される停止筒64に一体的に取付固定され、第3遊転ギヤ63は、停止筒64の外周に回転可能な状態で外装される制動筒66に一体的に設置固定されている。くわえて、停止筒64と制動筒66の間には、停止筒64と一体回転するとともに停止筒64の軸方向に移動可能な接続筒67が介装支持されている。なお、ミッション伝動軸24、入力軸27、停止筒64、制動筒66及び接続筒67は、全て同心軸上に配置されている。   The first idle gear 61 and the second idle gear 62 are integrally attached and fixed to a stop cylinder 64 that is externally rotated (in an idle state) on the outer periphery of the input shaft 27, and the third idle gear. 63 is integrally installed and fixed to a brake cylinder 66 that is rotatably mounted on the outer periphery of the stop cylinder 64. In addition, between the stop cylinder 64 and the brake cylinder 66, a connection cylinder 67 that rotates integrally with the stop cylinder 64 and is movable in the axial direction of the stop cylinder 64 is supported. The transmission shaft 24, the input shaft 27, the stop cylinder 64, the brake cylinder 66, and the connection cylinder 67 are all arranged on a concentric shaft.

上記接続筒67外周及び制動筒66内周には、それぞれ複数の摩擦板67a,66aが一体的に突出形成されており、接続筒67のクラッチケース47側の端部には当接面67bが形成されている。そして、主クラッチ26を段階的に入作動させると、クラッチケース47の端部が上記当接面67bに圧接されて接続筒67の摩擦板67aが制動筒66の摩擦板66aに徐々に押圧され、主クラッチ26が完全に入状態になった段階で、制動筒66が停止筒64と一体的に回転するように接続筒67を介して制動筒66が停止筒64に接続される。一方、主クラッチ26を切作動させると、クラッチケース47の端部が上記当接面67bから離間して接続筒67の摩擦板67aが制動筒66の摩擦板66aから離れ、制動筒66と停止筒64の接続が解除される。この際、制動筒66(第3遊転ギヤ63)は、停止筒64や入力軸27に対して回転自在な状態(遊転状態)になる。   A plurality of friction plates 67a and 66a are integrally formed on the outer periphery of the connection cylinder 67 and the inner periphery of the brake cylinder 66, respectively, and a contact surface 67b is formed at the end of the connection cylinder 67 on the clutch case 47 side. Is formed. When the main clutch 26 is gradually engaged and operated, the end of the clutch case 47 is pressed against the contact surface 67b, and the friction plate 67a of the connection cylinder 67 is gradually pressed against the friction plate 66a of the brake cylinder 66. When the main clutch 26 is completely engaged, the brake cylinder 66 is connected to the stop cylinder 64 via the connection cylinder 67 so that the brake cylinder 66 rotates integrally with the stop cylinder 64. On the other hand, when the main clutch 26 is disengaged, the end of the clutch case 47 is separated from the contact surface 67b, the friction plate 67a of the connection cylinder 67 is separated from the friction plate 66a of the brake cylinder 66, and the brake cylinder 66 is stopped. The connection of the cylinder 64 is released. At this time, the brake cylinder 66 (third idle gear 63) is in a freely rotatable state (idle state) with respect to the stop cylinder 64 and the input shaft 27.

上記構成の本乗用田植機は、走行変速部31が切作動されることにより、一体回転する第1遊転ギヤ61と第2遊転ギヤ62が、変速軸32と一体回転する第1制動ギヤ53と第2制動ギヤ58にそれぞれに噛合う。この際、第1制動ギヤ53と第2制動ギヤ58の歯数は異なるため、第1制動ギヤ53及び第1遊転ギヤ61を介した変速軸32から停止筒64への動力伝動における変速比と、第2制動ギヤ58及び第2遊転ギヤ62を介した変速軸32から停止筒64への動力伝動における変速比と、に差異が生じ、変速軸32が停止(制動)される。   In the riding rice transplanter having the above-described configuration, the first idler gear 61 and the second idler gear 62 that rotate integrally with the transmission shaft 32 are rotated integrally with the transmission shaft 32 when the traveling transmission unit 31 is turned off. 53 and the second brake gear 58 are engaged with each other. At this time, since the number of teeth of the first braking gear 53 and the second braking gear 58 is different, the gear ratio in the power transmission from the transmission shaft 32 to the stop cylinder 64 via the first braking gear 53 and the first idle gear 61. And a speed ratio in the power transmission from the speed change shaft 32 to the stop cylinder 64 via the second brake gear 58 and the second idle gear 62, and the speed change shaft 32 is stopped (braking).

すなわち、シフタギヤ51等が前述の走行側連動機構57を構成しており、走行変速部31の切作動時、この走行側連動機構57が第1制動ギヤ53と第1遊転ギヤ61との噛合いにより制動機構54を入作動させて前後輪1,2を停止させる。   That is, the shifter gear 51 and the like constitute the traveling side interlocking mechanism 57 described above, and the traveling side interlocking mechanism 57 meshes with the first braking gear 53 and the first idle gear 61 when the traveling speed change unit 31 is turned off. Thus, the brake mechanism 54 is turned on to stop the front and rear wheels 1 and 2.

また、主クラッチ26を切作動することにより、制動筒66が停止筒64に接続され、第2遊転ギヤ62と第3遊転ギヤ63を一体回転させる。この一体回転する第2遊転ギヤ62と第3遊転ギヤ64が、変速軸32と一体回転する第2制動ギヤ58と第3制動ギヤ59に常時噛合っているとともに第2制動ギヤ58と第3制動ギヤ59の歯数は異なってなるため、第2制動ギヤ58及び第2遊転ギヤ62を介した変速軸32から停止筒64への動力伝動における変速比と、第3制動ギヤ59、第3遊転ギヤ63、制動筒66及び接続筒67を介した変速軸32から停止筒64への動力伝動における変速比と、に差異が生じ、変速軸32が制動される。   Further, by disengaging the main clutch 26, the brake cylinder 66 is connected to the stop cylinder 64, and the second idle gear 62 and the third idle gear 63 are rotated together. The second idler gear 62 and the third idler gear 64 that rotate together are always meshed with the second brake gear 58 and the third brake gear 59 that rotate integrally with the transmission shaft 32 and the second brake gear 58. Since the number of teeth of the third braking gear 59 is different, the gear ratio in the power transmission from the transmission shaft 32 to the stop cylinder 64 via the second braking gear 58 and the second idle gear 62, and the third braking gear 59 There is a difference between the transmission gear ratio from the transmission shaft 32 to the stop cylinder 64 via the third idler gear 63, the brake cylinder 66, and the connection cylinder 67, and the transmission shaft 32 is braked.

すなわち、クラッチケース47、接続筒67、制動筒66等が前述のクラッチ側連動機構56を構成しており、主クラッチ26の切作動時、このクラッチ側連動機構56が接続筒67の摩擦板67aと制動筒66の摩擦板66aとの当接により制動機構54を入作動させて前後輪1,2を制動させる。   That is, the clutch case 47, the connecting cylinder 67, the braking cylinder 66, etc. constitute the above-mentioned clutch side interlocking mechanism 56, and when the main clutch 26 is disengaged, this clutch side interlocking mechanism 56 is the friction plate 67a of the connecting cylinder 67. And the friction plate 66a of the brake cylinder 66 abuts and operates the brake mechanism 54 to brake the front and rear wheels 1 and 2.

なお、上記走行側連動機構57によって、主クラッチ機構26の入状態時に制動機構54の入状態を保持させることが可能になる。   The traveling side interlocking mechanism 57 can keep the braking mechanism 54 engaged when the main clutch mechanism 26 is engaged.

次に、図1,3乃至6に基づき、走行変速部の切換操作手段及び主クラッチの入切操作手段について説明する。
図5は、主クラッチの入切操作手段の構成を示す要部側面図である。操縦部11の床面68側には、踏込み操作可能にクラッチ・ブレーキ兼用ペダル(ペダル式操作具)69が支持されている。クラッチ・ブレーキ兼用ペダル69を支持する支持軸71には、操作リンク72を介して、ミッションケース17に前後揺動自在に支持された作動アーム73が連結されている。そして、クラッチ・ブレーキ兼用ペダル69の踏込み操作及び踏込み解除操作によって作動アーム73を前後揺動させ、この作動アーム73の前後揺動によってミッションケース17内のクラッチケース47がミッション伝動軸24の軸方向に往復作動することにより、主クラッチ26が入切操作される。
Next, based on FIGS. 1, 3 to 6, the switching operation means of the traveling transmission unit and the on / off operation means of the main clutch will be described.
FIG. 5 is a side view of the main part showing the configuration of the main clutch on / off operation means. A clutch / brake combined pedal (pedal type operation tool) 69 is supported on the floor surface 68 side of the control unit 11 so as to be able to be depressed. An operating arm 73 supported by the transmission case 17 so as to be swingable back and forth is connected to a support shaft 71 that supports the clutch / brake pedal 69 via an operation link 72. Then, the operating arm 73 is swung back and forth by depressing and depressing the clutch / brake combined pedal 69, and the clutch case 47 in the transmission case 17 is moved in the axial direction of the transmission shaft 24 by the back and forth swing of the operating arm 73. Thus, the main clutch 26 is turned on and off.

図6は、走行変速部の切換操作手段の構成を示す要部平面図である。操縦部11に前後揺動自在に支持された副変速レバー74(走行変速操作具)は、連結ロッド76及び連結アーム77を介して、ミッションケース17に揺動可能に支持されたシフタアーム78に連結されている。副変速レバー74を前後揺動操作することにより、シフタアーム78が揺動され、前述のシフタギヤ51が変速軸32上を往復作動し、走行変速部31を高速状態と低速状態とニュートラル状態との3段階で切換操作する。   FIG. 6 is a plan view of a principal part showing the configuration of the switching operation means of the traveling transmission unit. A sub-transmission lever 74 (travel shift operation tool) supported on the control unit 11 so as to be swingable back and forth is connected to a shifter arm 78 supported swingably on the transmission case 17 via a connecting rod 76 and a connecting arm 77. Has been. By operating the auxiliary transmission lever 74 to swing back and forth, the shifter arm 78 is swung, the shifter gear 51 described above reciprocates on the transmission shaft 32, and the traveling transmission unit 31 is moved into the high speed state, the low speed state, and the neutral state. Switch operation in stages.

以上のように構成される本乗用田植機によれば、主クラッチ26、制動機構54、クラッチ側連動機構56及び走行側連動機構57がミッション伝動軸24と、入力軸27と、変速軸52との間に集中的に配置されるため、その構造をシンプル且つコンパクトに構成することが可能になる。   According to the passenger rice transplanter configured as described above, the main clutch 26, the braking mechanism 54, the clutch-side interlocking mechanism 56, and the traveling-side interlocking mechanism 57 include the transmission shaft 24, the input shaft 27, and the transmission shaft 52. Therefore, the structure can be configured simply and compactly.

本発明の作業車両の伝動装置を適用した乗用田植機の全体側面図である。1 is an overall side view of a riding rice transplanter to which a transmission device for a work vehicle according to the present invention is applied. 本乗用田植機の動力伝動系統図である。It is a power transmission system diagram of this riding rice transplanter. ミッションケース内の要部動力伝動系統図である。It is a principal part power transmission system diagram in a mission case. ミッションケース内の要部展開図である。It is a principal part expanded view in a mission case. 主クラッチの入切操作手段の構成を示す要部側面図である。It is a principal part side view which shows the structure of the main clutch on / off operation means. 走行変速部の切換操作手段の構成を示す要部平面図である。It is a principal part top view which shows the structure of the switching operation means of a travel transmission part.

符号の説明Explanation of symbols

1 前輪(走行部)
2 後輪(走行部)
3 走行機体(機体)
6 植付作業機(作業機)
7 エンジン
26 主クラッチ(主クラッチ機構)
27 入力軸(分岐軸)
28 作業変速部(作業側伝動機構)
31 走行変速部(走行側伝動機構)
32 変速軸
48 高速ギヤ(変速ギヤ)
49 低速ギヤ(変速ギヤ)
52 小径ギヤ(変速ギヤ)
53 大径ギヤ(ギヤ,変速ギヤ,第1制動ギヤ)
54 制動機構
56 クラッチ側連動機構
57 走行側連動機構
61 第1遊転ギヤ(ギヤ)
66a 摩擦板
67a 摩擦板
1 Front wheel (traveling part)
2 Rear wheels (traveling part)
3 Traveling aircraft (airframe)
6 Planting work machine (work machine)
7 Engine 26 Main clutch (Main clutch mechanism)
27 Input axis (branch axis)
28 Work transmission section (work side transmission mechanism)
31 Traveling transmission (traveling side transmission mechanism)
32 Transmission shaft 48 High-speed gear (transmission gear)
49 Low speed gear
52 Small-diameter gear (transmission gear)
53 Large-diameter gear (gear, transmission gear, first braking gear)
54 Braking mechanism 56 Clutch side interlocking mechanism 57 Traveling side interlocking mechanism 61 First idle gear (gear)
66a Friction plate 67a Friction plate

Claims (3)

エンジン(7)からの動力によって回転駆動される入力軸(27)と、変速軸(32)上を軸方向に移動して変速ギヤ(48),(49),(52),(53)の噛合いを変更又は解除することにより入力軸(27)側から機体(3)を走行させる走行部(1),(2)側への動力の断続及び変速を行なう走行側伝動機構(31)と、入力軸(27)からの動力を機体(3)に連結される作業機(6)に伝動する作業側伝動機構(28)と、エンジン(7)側から入力軸(27)への動力の断続を行なう主クラッチ機構(26)と、走行部(1),(2)を制動する制動機構(54)と、前記主クラッチ機構(26)の切作動に制動機構(54)の入作動を連動させるクラッチ側連動機構(56)とを備え、主クラッチ機構(26)の入状態時に制動機構(54)の入状態を保持できる作業車両の伝動装置において、走行側伝動機構(31)の切作動に伴って制動機構(54)を入作動させる走行側連動機構(57)及び前記制動機構(54)を変速軸(32)に設けた作業車両の伝動装置。   An input shaft (27) that is rotationally driven by the power from the engine (7) and an axial movement on the transmission shaft (32) to move the transmission gears (48), (49), (52), (53) A traveling section (1) for traveling the machine body (3) from the input shaft (27) side by changing or releasing the meshing, a traveling side transmission mechanism (31) for performing intermittent power transmission and shifting to the (2) side; The work side transmission mechanism (28) that transmits the power from the input shaft (27) to the work machine (6) connected to the machine body (3), and the power from the engine (7) side to the input shaft (27) The main clutch mechanism (26) that performs intermittent operation, the braking mechanism (54) that brakes the traveling units (1) and (2), and the on / off operation of the braking mechanism (54) for the disengagement operation of the main clutch mechanism (26). A clutch side interlocking mechanism (56) to be interlocked, and the main clutch mechanism (26) is in an engaged state In the transmission device of the work vehicle that can maintain the on state of the braking mechanism (54), the traveling side interlocking mechanism (57) that turns on and activates the braking mechanism (54) when the traveling side transmission mechanism (31) is turned off; A transmission device for a work vehicle in which a braking mechanism (54) is provided on a transmission shaft (32). 走行側伝動機構(31)の切作動に伴うギヤ(53),(61)の噛合いにより走行部(1),(2)が制動されるように制動機構(54)及び走行側連動機構(57)を構成した請求項1の作業車両の伝動装置。   The braking mechanism (54) and the traveling side interlocking mechanism (so that the traveling parts (1), (2) are braked by the meshing of the gears (53), (61) accompanying the turning operation of the traveling side transmission mechanism (31). 57) The transmission device for a work vehicle according to claim 1. 主クラッチ機構(26)の切作動に伴う摩擦板(66a),(67a)の当接により走行部(1),(2)が制動されるように制動機構(54)及びクラッチ側連動機構(56)を構成した請求項1又は2の作業車両の伝動装置。   The braking mechanism (54) and the clutch side interlocking mechanism (54) are braked so that the running parts (1), (2) are braked by the contact of the friction plates (66a), (67a) accompanying the turning operation of the main clutch mechanism (26). 56) The transmission device for a work vehicle according to claim 1 or 2, wherein
JP2008117697A 2008-04-28 2008-04-28 Power transmission device for working vehicle Pending JP2009262871A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109263464A (en) * 2018-11-16 2019-01-25 苏州久富农业机械有限公司 Working in paddy field

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109263464A (en) * 2018-11-16 2019-01-25 苏州久富农业机械有限公司 Working in paddy field

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