JPH058646A - Running drive device - Google Patents

Running drive device

Info

Publication number
JPH058646A
JPH058646A JP15452291A JP15452291A JPH058646A JP H058646 A JPH058646 A JP H058646A JP 15452291 A JP15452291 A JP 15452291A JP 15452291 A JP15452291 A JP 15452291A JP H058646 A JPH058646 A JP H058646A
Authority
JP
Japan
Prior art keywords
clutch
transmission
output shaft
oil
traveling
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.)
Pending
Application number
JP15452291A
Other languages
Japanese (ja)
Inventor
Michio Ishikawa
道男 石川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Original Assignee
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iseki and Co Ltd, Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki and Co Ltd
Priority to JP15452291A priority Critical patent/JPH058646A/en
Publication of JPH058646A publication Critical patent/JPH058646A/en
Pending legal-status Critical Current

Links

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  • Motor Power Transmission Devices (AREA)

Abstract

PURPOSE:To maintain safety, to improve comfortability, and to stabilize the vehicle by providing smooth braking on a sudden stop operation to prevent a great impact due to the operation. CONSTITUTION:A clutch 6 is provided between the input axis 3 of a transmission gear 2 driving a running device 1 and the output axis 5 of a static hydraulic non-stage transmission 4. A link means which switches the engagement and disengagement of the clutch 6 in relation to the operation position of a speed change lever 7 is provided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、車輌における走行駆
動装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling drive device for a vehicle.

【0002】[0002]

【従来の技術】従来より、コンバイン等の作業車輌にお
いては、走行装置を駆動する伝動装置(ミッションケ−
ス)を備え、該伝動装置の入力軸に静油圧式無段変速装
置(HST)の出力軸を連結して走行駆動装置を構成し
ている。そして、前記静油圧式無段変速装置の変速操作
は操縦部に設けた変速レバ−の傾動操作によって行われ
る。前記静油圧式無段変速装置は、エンジン等の駆動源
によって駆動されるポンプと該ポンプからの送油を受け
て回転するモ−タとから成るもので、前記ポンプの吐出
油量を変更することで前記モ−タの出力軸の回転速度を
変速するものである。前記ポンプの吐出油量の変更は前
記操縦部に設けた変速レバ−の傾動操作によって行われ
る。
2. Description of the Related Art Conventionally, in a working vehicle such as a combine, a transmission (drive transmission) for driving a traveling device is used.
And an output shaft of a hydrostatic continuously variable transmission (HST) is connected to an input shaft of the transmission device to form a traveling drive device. The shifting operation of the hydrostatic stepless transmission is performed by tilting a shift lever provided in the control section. The hydrostatic continuously variable transmission is composed of a pump driven by a drive source such as an engine and a motor that rotates by receiving oil from the pump, and changes the amount of oil discharged from the pump. Thus, the rotation speed of the output shaft of the motor is changed. The amount of oil discharged from the pump is changed by tilting a shift lever provided in the control section.

【0003】[0003]

【発明が解決しようとする課題】前述の、従来の走行駆
動装置において、車輌の走行を停止する際には変速レバ
−を前進又は後進位置から中立位置へと操作するのであ
るが、この操作を急激に行うと、車輌の走行装置は急激
に停止してしまう。即ち、変速レバ−を中立位置へ急激
に操作すると、前述の静油圧式無段変速装置のポンプの
吐出油は即座に遮断され、モ−タの出力軸の回転は即座
に停止する。そして、前記モ−タの出力軸に連結した伝
動装置の入力軸も即座に停止することとなり、伝動装置
によって駆動される走行装置も急激に停止することとな
る。この結果、車輌は衝撃的に急停止することになり、
この結果車輌自体が前のめりに傾き、操縦者に危険を与
える等、極めて不安定な状態となってしまっていた。
In the above-mentioned conventional traveling drive device, when the traveling of the vehicle is stopped, the shift lever is operated from the forward or reverse position to the neutral position. If it is performed abruptly, the traveling device of the vehicle suddenly stops. That is, when the shift lever is rapidly operated to the neutral position, the discharge oil of the pump of the hydrostatic stepless transmission is immediately cut off, and the rotation of the output shaft of the motor is immediately stopped. Then, the input shaft of the transmission connected to the output shaft of the motor is also immediately stopped, and the traveling device driven by the transmission is also suddenly stopped. As a result, the vehicle suddenly stops suddenly,
As a result, the vehicle itself leans forward and poses a danger to the operator, resulting in an extremely unstable condition.

【0004】[0004]

【課題を解決するための手段】この発明は、上述の如き
課題を解決するために、次の様な技術的手段を講ずる。
すなわち、走行装置1を駆動する伝動装置2の入力軸3
と静油圧式無段変速装置4の出力軸5との間にクラッチ
6を介装すると共に、該クラッチ6の入り切りを変速レ
バ−7の操作位置に関連して切り換える連繋手段8を設
けたことを特徴とする走行駆動装置の構成としたもので
ある。
In order to solve the above-mentioned problems, the present invention takes the following technical means.
That is, the input shaft 3 of the transmission 2 that drives the traveling device 1
A clutch 6 is provided between the output shaft 5 and the output shaft 5 of the hydrostatic continuously variable transmission 4, and a connecting means 8 is provided for switching the on / off of the clutch 6 in relation to the operation position of the shift lever 7. The configuration of the traveling drive device is characterized by the following.

【0005】[0005]

【発明の作用効果】この発明における走行駆動装置の作
用について説明する。操縦者による手動又は自動出力に
よって変速レバ−7が中立位置から前進又は後進位置へ
位置変更されると、静油圧式無段変速装置4のポンプか
ら作動油が吐出しモ−タを駆動して出力軸5を回転させ
る。このとき該出力軸5と伝動装置2の入力軸3との間
に設けられたクラッチ6は入り状態(接続状態)にある
ので、伝動装置2が駆動され、走行装置1が駆動されて
車輌は前進又は後進する。
The operation of the traveling drive system according to the present invention will be described. When the shift lever 7 is moved from the neutral position to the forward or reverse position by the operator's manual or automatic output, hydraulic fluid is discharged from the pump of the hydrostatic stepless transmission 4 to drive the motor. The output shaft 5 is rotated. At this time, since the clutch 6 provided between the output shaft 5 and the input shaft 3 of the transmission device 2 is in the engaged state (connected state), the transmission device 2 is driven, the traveling device 1 is driven, and the vehicle is Move forward or backward.

【0006】そして、走行状態において何らかの要因に
よって変速レバ−7が前進又は後進位置から中立位置へ
位置変更されると、静油圧式無段変速装置4のポンプか
らの作動油の吐出は即座に遮断されてモ−タの出力軸5
の回転はあたかもロックしたように即座に停止する。し
かしこの少なくとも一瞬の間、連繋手段8の作動によっ
て該出力軸5と伝動装置2の入力軸3との間に設けられ
たクラッチ6は切り状態(離脱状態)に保持されるの
で、伝動装置2の入力軸3は前記出力軸5によって固定
されることなく自由回転状態に保持される。
When the shift lever 7 is moved from the forward or reverse position to the neutral position for some reason while the vehicle is running, the discharge of hydraulic oil from the pump of the hydrostatic stepless transmission 4 is immediately cut off. Motor output shaft 5
The rotation of stops immediately as if it were locked. However, for at least a moment, the clutch 6 provided between the output shaft 5 and the input shaft 3 of the transmission 2 is held in the disengaged state (disengaged state) by the operation of the connecting means 8, so that the transmission 2 The input shaft 3 is held by the output shaft 5 in a freely rotating state without being fixed.

【0007】これによって車輌の急激な停止による衝撃
を逃がすことができ、車輌を安全且つ円滑に停止させる
ことができるものである。
As a result, the shock caused by the sudden stop of the vehicle can be released, and the vehicle can be stopped safely and smoothly.

【0008】[0008]

【実施例】この発明の一実施例をコンバインを例に説明
する。コンバインの機体は、車台9の上方に全稈投入型
の脱穀装置10、穀粒貯留装置11、操縦部12、エン
ジン13等を搭載して車体14を構成し、該車体14の
前方には刈取装置15を昇降自在に設けて構成する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described by taking a combine as an example. The combine fuselage has a carcass 14 having a whole culm-type threshing device 10, a grain storage device 11, a control unit 12, an engine 13 and the like mounted above a chassis 9 and a cutting body in front of the car body 14. The device 15 is configured to be movable up and down.

【0009】尚、前記操縦部12には、変速レバ−7を
設ける。また、前記車台9の下方には左右の無端帯式の
走行装置1,1を設ける。該左右の走行装置2,2は、
前記車台9に取り付けた伝動装置2(ミッションケ−
ス)から設ける駆動スプロケット16,16によって駆
動される構成である。前記伝動装置2は上部の入力軸3
から中間軸17、サイドクラッチ軸18、カウンタ軸1
9を介して前記駆動スプロケット16,16を有する車
軸20,20を歯車伝動する従来周知の構成である。
A shift lever 7 is provided in the control section 12. Further, right and left endless belt type traveling devices 1 and 1 are provided below the chassis 9. The left and right traveling devices 2 and 2 are
The transmission 2 attached to the chassis 9 (mission case)
It is driven by drive sprockets 16, 16 provided from the sprockets. The transmission 2 has an upper input shaft 3
To intermediate shaft 17, side clutch shaft 18, counter shaft 1
It is a conventionally well-known structure in which the axles 20 and 20 having the drive sprockets 16 and 16 are gear-transmitted via a gear 9.

【0010】そして、前記伝動装置2の入力軸3の一端
部にはクラッチ6を介して静油圧式無段変速装置4の出
力軸5を接続する。該クラッチ6は入力軸3側のハウジ
ング21に係合した摩擦板22と、出力軸5のスプライ
ンに係合したスライダ23に係合した摩擦板24とを圧
接させて摩擦力により動力を伝達するもので、前記スラ
イダ23はシフトア−ム25によって摺動作動するもの
である。該シフトア−ム25はクラッチ作動シリンダ2
6の伸縮によって作動する構成である。尚、前記クラッ
チ作動シリンダ26の非作動状態において前記クラッチ
6はバネにより常時入り状態(接続状態)に保持される
構成である。
An output shaft 5 of the hydrostatic continuously variable transmission 4 is connected to one end of the input shaft 3 of the transmission 2 via a clutch 6. The clutch 6 presses the friction plate 22 engaged with the housing 21 on the input shaft 3 side and the friction plate 24 engaged with the slider 23 engaged with the spline of the output shaft 5 to transmit power by friction force. The slider 23 is slidably operated by the shift arm 25. The shift arm 25 is a clutch operating cylinder 2
It is configured to operate by expansion and contraction of 6. The clutch 6 is always held in the engaged state (connected state) by a spring when the clutch operating cylinder 26 is not in operation.

【0011】また、前記静油圧式無段変速装置4は油圧
ポンプ27と油圧モ−タ28との入出力ポ−トを各々油
路29で結んだものであり、油圧ポンプ27は前記エン
ジン13によって常時駆動されるものである。前記油圧
ポンプ27の吐出油量の調節は前記変速レバ−7の傾動
によるポンプ斜板の角度変更(トラニオン軸の回動調
節)によって行われ、これによって送油を受ける油圧モ
−タ28の回転速度を変更して前記伝動装置2への入力
回転速度を変更するものである。これによって車輌の走
行速度を無段階に変更することができるものである。
尚、30,30はリリ−フバルブである。
The hydrostatic continuously variable transmission 4 is constructed by connecting the input / output ports of the hydraulic pump 27 and the hydraulic motor 28 by oil passages 29, and the hydraulic pump 27 is connected to the engine 13. It is always driven by. The amount of oil discharged from the hydraulic pump 27 is adjusted by changing the angle of the pump swash plate (rotational adjustment of the trunnion shaft) by tilting the shift lever 7, and the rotation of the hydraulic motor 28 that receives the oil is thereby adjusted. The speed is changed to change the input rotation speed to the transmission device 2. As a result, the traveling speed of the vehicle can be changed steplessly.
Incidentally, reference numerals 30 and 30 are relief valves.

【0012】しかして、前記静油圧式無段変速装置4の
油路29に油圧取出油路31を接続する。該油圧取出油
路31の終端には前記クラッチ作動シリンダ26を接続
し、該クラッチ作動シリンダ26に至る中間部には前記
変速レバ−7の傾動に連動して切り替わる油圧バルブ3
2を設ける。該油圧バルブ32は前記変速レバ−7が前
進又は後進位置にあるときには常に閉ざされており、ク
ラッチ作動シリンダ26へは送油不能である。そして、
前記変速レバ−7が中立位置及び中立位置付近にあると
きには前記油圧バルブ32は開状態となり、前記クラッ
チ作動シリンダ26へ送油可能な状態となる。尚、33
は返油路であり、前記油圧バルブ32によって前記油圧
取出油路31と択一的に開閉されるものである。これが
連繋手段8である。
Therefore, the oil pressure extraction oil passage 31 is connected to the oil passage 29 of the hydrostatic continuously variable transmission 4. The clutch operating cylinder 26 is connected to the end of the hydraulic oil take-out passage 31, and the hydraulic valve 3 that switches in conjunction with the tilt of the speed change lever 7 is connected to an intermediate portion reaching the clutch operating cylinder 26.
2 is provided. The hydraulic valve 32 is always closed when the shift lever 7 is in the forward or reverse position, and cannot feed oil to the clutch operating cylinder 26. And
When the shift lever 7 is in the neutral position and in the vicinity of the neutral position, the hydraulic valve 32 is in the open state, and the oil can be sent to the clutch operating cylinder 26. 33
Is an oil return passage, which is selectively opened and closed by the hydraulic pressure valve 32 with the hydraulic pressure take-out oil passage 31. This is the connecting means 8.

【0013】以上の構成により、変速レバ−7を傾動し
て走行中に、変速レバ−7を急激に中立位置へ戻すと、
油圧ポンプ27の戻り側ポ−トは閉ざされる。またこの
瞬間、出力軸5は伝動装置2の入力軸から慣性力で逆駆
動されるため、油圧モ−タ28の吐出側ポ−トからは圧
油を吐出している。このため前記油圧モ−タ28から油
圧ポンプ27への返送油路であった油路29中に瞬間的
に高い圧力が発生する。この圧力は前記油圧取出油路3
1中、油圧バルブ32を経てクラッチ作動シリンダ26
に至り、前記クラッチ6をわずかの間切り作動即ち離脱
作動させる。これによって前記出力軸5と入力軸3との
連結はわずかの間解かれ、入力軸3の逆駆動による回転
力を逃がすことができる。尚、前述の高圧の発生は一瞬
であるので、元の圧力に復帰後は再び前記クラッチ6は
入り状態(接続状態)に戻る。
With the above structure, when the gearshift lever 7 is tilted and the gearshift lever 7 is rapidly returned to the neutral position during traveling,
The return port of the hydraulic pump 27 is closed. Further, at this moment, the output shaft 5 is reversely driven by the inertial force from the input shaft of the transmission device 2, so that pressure oil is discharged from the discharge side port of the hydraulic motor 28. For this reason, a high pressure is instantaneously generated in the oil passage 29 which was the return oil passage from the hydraulic motor 28 to the hydraulic pump 27. This pressure is applied to the hydraulic pressure take-out oil passage 3
1, the clutch operating cylinder 26 through the hydraulic valve 32.
Then, the clutch 6 is actuated to be slightly disengaged, that is, disengaged. As a result, the connection between the output shaft 5 and the input shaft 3 is released for a short time, and the rotational force due to the reverse drive of the input shaft 3 can be released. Since the high pressure is generated for a moment, the clutch 6 returns to the engaged state (connected state) again after returning to the original pressure.

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

【図1】この発明の一実施例における説明用油圧回路図
である。
FIG. 1 is an explanatory hydraulic circuit diagram in an embodiment of the present invention.

【図2】この発明の一実施例における要部を破断して示
す説明図である。
FIG. 2 is an explanatory view showing a main part in a broken manner according to an embodiment of the present invention.

【図3】この発明の一実施例における伝動装置の断面図
である。
FIG. 3 is a sectional view of a transmission device according to an embodiment of the present invention.

【図4】この発明の別実施例におけるコンバインの側面
図である。
FIG. 4 is a side view of a combine according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 走行装置 2 伝動装置 3 入力軸 4 静油圧式無段変速装置 5 出力軸 6 クラッチ 7 変速レバ− 8 連繋手段 1 Traveling device 2 Transmission device 3 Input shaft 4 Hydrostatic stepless transmission 5 Output shaft 6 Clutch 7 Shift lever 8 Connecting means

Claims (1)

【特許請求の範囲】 【請求項1】 走行装置1を駆動する伝動装置2の入力
軸3と静油圧式無段変速装置4の出力軸5との間にクラ
ッチ6を介装すると共に、該クラッチ6の入り切りを変
速レバ−7の操作位置に関連して切り換える連繋手段8
を設けたことを特徴とする走行駆動装置。
Claims: 1. A clutch 6 is provided between an input shaft 3 of a transmission 2 for driving a traveling device 1 and an output shaft 5 of a hydrostatic stepless transmission 4, and Connecting means 8 for switching the on / off state of the clutch 6 in relation to the operation position of the shift lever 7.
A traveling drive device characterized by being provided.
JP15452291A 1991-06-26 1991-06-26 Running drive device Pending JPH058646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15452291A JPH058646A (en) 1991-06-26 1991-06-26 Running drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15452291A JPH058646A (en) 1991-06-26 1991-06-26 Running drive device

Publications (1)

Publication Number Publication Date
JPH058646A true JPH058646A (en) 1993-01-19

Family

ID=15586098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15452291A Pending JPH058646A (en) 1991-06-26 1991-06-26 Running drive device

Country Status (1)

Country Link
JP (1) JPH058646A (en)

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