JPH1191377A - Travel driving device of working vehicle - Google Patents
Travel driving device of working vehicleInfo
- Publication number
- JPH1191377A JPH1191377A JP27353297A JP27353297A JPH1191377A JP H1191377 A JPH1191377 A JP H1191377A JP 27353297 A JP27353297 A JP 27353297A JP 27353297 A JP27353297 A JP 27353297A JP H1191377 A JPH1191377 A JP H1191377A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- output shaft
- input shaft
- speed
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 86
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 9
- 210000000078 claw Anatomy 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Arrangement Of Transmissions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、作業車の走行駆動
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 driving device for a working vehicle.
【０００２】[0002]
【従来の技術】従来、作業車の走行駆動装置としては、
エンジンにＨＳＴ（静油圧駆動変速機）を連動連結し、
同ＨＳＴに副変速機を連動連結し、同副変速機に駆動輪
を連動連結したものが知られている。2. Description of the Related Art Conventionally, as a traveling drive device of a working vehicle,
HST (hydrostatic transmission) is linked to the engine,
It is known that an auxiliary transmission is interlocked to the HST and drive wheels are interlocked to the auxiliary transmission.
【０００３】そして、副変速機により、高速走行側の動
力伝達経路と低速走行側の動力伝達経路とを切り替え
て、作業車を高速又は低速で走行させるようにしてい
た。[0003] Then, the auxiliary transmission is used to switch the power transmission path on the high-speed traveling side and the power transmission path on the low-speed traveling side so that the work vehicle travels at a high or low speed.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来の
作業車の走行駆動装置にあっては、変速機構が副変速機
に限られていたため、作業車を高速又は低速で走行させ
ることしかできず、従来の低速走行よりも一層低速で走
行させる極低速走行を行うことができず、極低速で、し
かも、高トルクで行う作業機の牽引作業等が困難な場合
があった。However, in the above-mentioned conventional traveling drive system for a working vehicle, the speed change mechanism is limited to the auxiliary transmission, so that the working vehicle can only run at high speed or low speed. In addition, it is not possible to perform extremely low-speed traveling, in which the vehicle travels at a lower speed than in the conventional low-speed traveling, and it is sometimes difficult to tow a working machine at an extremely low speed and with a high torque.
【０００５】[0005]
【課題を解決するための手段】そこで、本発明は、原動
機に静油圧駆動変速機を連動連結し、同静油圧駆動変速
機に副変速機を連動連結し、同副変速機に駆動輪を連動
連結してなる作業車の走行駆動装置において、副変速機
と駆動輪との間に変速機を介設し、同変速機は、変速機
入力軸と変速機出力軸とを同軸状態に配置することとし
た。SUMMARY OF THE INVENTION Accordingly, the present invention provides an engine in which a hydrostatic drive transmission is interlocked to an engine, an auxiliary transmission is interlocked to the hydrostatic drive transmission, and drive wheels are connected to the auxiliary transmission. In a traveling drive device for a work vehicle connected in an interlocking manner, a transmission is interposed between a sub-transmission and a drive wheel, and the transmission has a transmission input shaft and a transmission output shaft arranged coaxially. It was decided to.
【０００６】また、前記変速機は、変速機入力軸と変速
機出力軸とを遊星変速機構を介して連動連結して、変速
可能に構成することとした。In addition, the transmission is configured such that the transmission input shaft and the transmission output shaft are interlockingly connected via a planetary transmission mechanism to be capable of shifting.
【０００７】[0007]
【発明の実施の形態】本発明に係る走行駆動装置は、原
動機に静油圧駆動変速機（ＨＳＴ）を連動連結し、同Ｈ
ＳＴに副変速機を連動連結し、同ＨＳＴに副変速機を連
動連結し、更には、同副変速機に変速機を連動連結し、
同変速機に左右側駆動輪をそれぞれ連動連結したもので
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A traveling drive device according to the present invention has a hydrostatic transmission (HST) interlockingly connected to a prime mover.
An auxiliary transmission is interlocked to the ST, an auxiliary transmission is interlocked to the HST, and a transmission is interlocked to the auxiliary transmission.
In this transmission, left and right driving wheels are linked to each other.
【０００８】変速機は、変速機入力軸と変速機出力軸と
を同軸状態に配置したものであり、しかも、変速機入力
軸と変速機出力軸とを遊星変速機構を介して連動連結し
て、変速可能に構成したものである。In the transmission, the transmission input shaft and the transmission output shaft are coaxially arranged, and furthermore, the transmission input shaft and the transmission output shaft are interlocked via a planetary transmission mechanism. , So that the speed can be changed.
【０００９】そして、副変速機と駆動輪との間に介設し
た変速機を作動させることにより、駆動輪を減速させる
ことができようにしたものである。[0009] The drive wheels can be decelerated by operating a transmission interposed between the sub-transmission and the drive wheels.
【００１０】そのため、従来の低速走行よりも一層低速
で走行させる極低速走行を行うことができ、極低速で、
しかも、高トルクで行う作業機の牽引作業等を行うこと
ができるものである。[0010] Therefore, it is possible to perform extremely low-speed traveling in which the vehicle travels at a much lower speed than the conventional low-speed traveling.
In addition, it is possible to perform towing work of the working machine performed at a high torque.
【００１１】[0011]
【実施例】以下に、本発明の実施例について図面を参照
しながら具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.
【００１２】図１は、本発明に係る走行駆動装置DRを具
備する作業車１としてのクローラ式トラクタを示した図
であり、作業車１は、機体フレーム４の前部に左右側前
車輪5,5 を配設する一方、機体フレーム４の後部に左右
側駆動輪6,6 を配設し、機体フレーム４の前側上部に原
動機部７を配設し、同原動機部７の後部に運転部８を配
設している。図中、３は履帯、９は３点リンク式の昇降
機構である。FIG. 1 is a view showing a crawler type tractor as a work vehicle 1 having a traveling drive device DR according to the present invention. The work vehicle 1 has left and right front wheels 5 on a front portion of a body frame 4. , 5, the left and right drive wheels 6, 6 are disposed at the rear of the body frame 4, the prime mover unit 7 is disposed at the upper front side of the body frame 4, and the driving unit is disposed at the rear of the prime mover unit 7. 8 are arranged. In the figure, 3 is a crawler belt, and 9 is a three-point link type lifting mechanism.
【００１３】走行駆動装置DRは、図２に示すように、原
動機10としてのエンジンに静油圧駆動変速機11（以下、
「ＨＳＴ11」という。）を連動連結し、同ＨＳＴ11に副
変速機12を連動連結し、同ＨＳＴ11に副変速機12を連動
連結し、更には、同副変速機12に変速機13を連動連結
し、同変速機13に左右側駆動輪6,6 をそれぞれ連動連結
している。図中、14は走行伝動機構、15,16 は動力伝動
機構である。As shown in FIG. 2, the traveling drive device DR is provided with a hydrostatic transmission 11 (hereinafter, referred to as an engine) as an engine 10.
It is called "HST11". ), The sub transmission 12 is connected to the HST 11, the sub transmission 12 is connected to the HST 11, and the transmission 13 is connected to the sub transmission 12. The left and right driving wheels 6, 6 are connected to each other in an interlocking manner. In the figure, 14 is a traveling power transmission mechanism, and 15 and 16 are power transmission mechanisms.
【００１４】副変速機12は、ＨＳＴ11に連動連結したＨ
ＳＴ出力軸17に大径の駆動平歯車18と小径の駆動平歯車
19とを多板式のクラッチ20を介して連動連結するととも
に、変速機13に連動連結した変速機入力軸21に大径の従
動平歯車22と小径の従動平歯車23とを取付けている。The auxiliary transmission 12 is an H
Large-diameter drive spur gear 18 and small-diameter drive spur gear on ST output shaft 17
19 are interlocked with each other via a multi-plate clutch 20, and a large-diameter driven spur gear 22 and a small-diameter driven spur gear 23 are mounted on a transmission input shaft 21 interlocked with the transmission 13.
【００１５】そして、副変速機12は、クラッチ20の作動
により、大径の駆動平歯車18と小径の従動平歯車23、或
いは、小径の駆動平歯車19と大径の従動平歯車22とを選
択的に噛合させることができるようにしている。The sub-transmission 12 operates the clutch 20 to operate the large-diameter drive spur gear 18 and the small-diameter driven spur gear 23 or the small-diameter drive spur gear 19 and the large-diameter driven spur gear 22. It can be selectively engaged.
【００１６】変速機13は、図３に示すように、変速機入
力軸21の先端を変速機出力軸24の基端に回動自在に挿入
して同軸状態に配置し、変速機出力軸24の基端部にピニ
オンケージ25を固着し、同ピニオンケージ25に回動自在
に取付けたピニオンギヤ26を、変速機入力軸21の先端部
に形成した入力ギヤ27に噛合し、更には、ピニオンギヤ
26に噛合するリングギヤ28とピニオンケージ25とをクラ
ッチ29を介して連動連結する一方、リングギヤ28と機体
フレーム４に固着したケーシング30とをクラッチ29を介
して連結可能として、遊星変速機構40を構成している。As shown in FIG. 3, the transmission 13 is rotatably inserted into the base end of the transmission output shaft 24 with the distal end of the transmission input shaft 21 disposed coaxially therewith. A pinion cage 25 is fixedly attached to the base end of the transmission, and a pinion gear 26 rotatably mounted on the pinion cage 25 is meshed with an input gear 27 formed at the distal end of the transmission input shaft 21.
The planetary transmission mechanism 40 is configured such that the ring gear 28 meshing with the gear 26 and the pinion cage 25 are interlockingly connected via a clutch 29, while the ring gear 28 and the casing 30 fixed to the body frame 4 can be connected via the clutch 29. doing.
【００１７】クラッチ29は、変速機出力軸24に遊嵌し、
端部にリングギヤ28を固着したクラッチケース31の内部
に、作動体32を変速機出力軸24に沿わせて摺動自在に配
設し、同作動体32の外周面にクラッチ爪33を突設し、同
クラッチ爪33と係止する係止爪34をケーシング30の内周
面に突設しており、クラッチ爪33は、クラッチケース31
に形成したスリット35に挿通している。図中、36はクラ
ッチケース31とピニオンケージ25との間に介設した多
板、37は付勢スプリング、38は外装ケース、39は油路で
ある。The clutch 29 is loosely fitted to the transmission output shaft 24,
An operating body 32 is slidably disposed along a transmission output shaft 24 inside a clutch case 31 having a ring gear 28 fixed to an end, and a clutch claw 33 protrudes from an outer peripheral surface of the operating body 32. A locking claw 34 for locking with the clutch claw 33 is protruded from the inner peripheral surface of the casing 30, and the clutch claw 33 is
Is inserted through the slit 35 formed at the bottom. In the figure, 36 is a multi-plate interposed between the clutch case 31 and the pinion cage 25, 37 is a biasing spring, 38 is an outer case, and 39 is an oil passage.
【００１８】そして、通常状態においては、付勢スプリ
ング37の作用により、クラッチ29の作動体32が左側へ移
動し、リングギヤ28とケーシング30とが接続状態となる
とともに、リングギヤ28とピニオンケージ25とが切断状
態となっており、リングギヤ28が固定された状態となる
ため、変速入力軸21から変速出力軸24へは、動力が減速
されて伝達するようにしている。In the normal state, the operating body 32 of the clutch 29 moves to the left by the action of the biasing spring 37, the ring gear 28 and the casing 30 are connected, and the ring gear 28 and the pinion cage 25 are connected. Is in a disconnected state, and the ring gear 28 is fixed, so that the power is reduced and transmitted from the speed change input shaft 21 to the speed change output shaft 24.
【００１９】一方、油路39から作動油を供給すると、作
動体32が付勢スプリング37の付勢力に抗して右側へ移動
し、リングギヤ28とケーシング30とが切断状態となると
ともに、リングギヤ28とピニオンケージ25とが接続状態
となっており、リングギヤ28が回動可能な状態となるた
め、変速入力軸21から変速出力軸24へは、動力が減速さ
れずに等速で伝達するようにしている。On the other hand, when the operating oil is supplied from the oil passage 39, the operating body 32 moves rightward against the urging force of the urging spring 37, and the ring gear 28 and the casing 30 are cut off. And the pinion cage 25 are in a connected state, and the ring gear 28 is in a rotatable state, so that power is transmitted from the speed change input shaft 21 to the speed change output shaft 24 at a constant speed without being decelerated. ing.
【００２０】このように、副変速機12と駆動輪6,6 との
間に変速機13を介設しているため、駆動輪6,6 を減速さ
せることができ、従来の低速走行よりも一層低速で走行
させる極低速走行を行うことができ、極低速で、しか
も、高トルクで行う作業機の牽引作業等を行うことがで
きる。As described above, the transmission 13 is interposed between the auxiliary transmission 12 and the driving wheels 6, 6, so that the driving wheels 6, 6 can be decelerated, which is lower than in the conventional low-speed traveling. It is possible to perform extremely low speed traveling at an even lower speed, and it is possible to perform towing work of a working machine at extremely low speed and with high torque.
【００２１】また、変速入力軸21と変速出力軸24とを同
軸状に配置するとともに、変速出力軸24にクラッチ29等
の変速機構を同軸状に配設しているため、変速機13を小
型なものとすることができる。The transmission input shaft 21 and the transmission output shaft 24 are coaxially arranged, and the transmission mechanism such as the clutch 29 is coaxially disposed on the transmission output shaft 24. It can be.
【００２２】さらに、クラッチ29の切替作動を油圧によ
り行う構成としているため、クラッチ29の切替作動を滑
らかに行うことができる。Further, since the switching operation of the clutch 29 is performed by hydraulic pressure, the switching operation of the clutch 29 can be performed smoothly.
【００２３】[0023]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is embodied in the form described above and has the following effects.
【００２４】すなわち、本発明では、原動機に静油圧駆
動変速機を連動連結し、同静油圧駆動変速機に副変速機
を連動連結し、同副変速機に駆動輪を連動連結してなる
作業車の走行駆動装置において、副変速機と駆動輪との
間に変速機を介設しているため、駆動輪を減速させるこ
とができ、従来の低速走行よりも一層低速で走行させる
極低速走行を行うことができ、極低速で、しかも、高ト
ルクで行う作業機の牽引作業等を行うことができる。In other words, according to the present invention, the work is performed by interlockingly connecting the hydrostatic transmission to the prime mover, interlocking the subtransmission to the hydrostatic transmission, and interlocking the driving wheels to the subtransmission. In a vehicle drive system, a transmission is interposed between the auxiliary transmission and the drive wheels, so that the drive wheels can be decelerated, and the vehicle can travel at a much lower speed than the conventional low speed travel. Can be performed, and a towing operation of the working machine performed at an extremely low speed and with a high torque can be performed.
【００２５】しかも、変速機入力軸と変速機出力軸とを
同軸状態に配置しているため、変速機を小型化すること
ができる。Further, since the transmission input shaft and the transmission output shaft are coaxially arranged, the size of the transmission can be reduced.
【図１】本発明に走行駆動装置を具備する作業車を示す
側面図。FIG. 1 is a side view showing a work vehicle provided with a traveling drive device according to the present invention.
【図２】走行駆動装置を示す説明図。FIG. 2 is an explanatory diagram showing a traveling drive device.
【図３】変速機を示す説明図。FIG. 3 is an explanatory view showing a transmission.
DR 走行駆動装置 １ 作業車 10 原動機 11 静油圧駆動変速機 12 副変速機 13 変速機 DR drive unit 1 work vehicle 10 prime mover 11 hydrostatic drive transmission 12 auxiliary transmission 13 transmission
Claims (2)
動連結し、同静油圧駆動変速機(11)に副変速機(12)を連
動連結し、同副変速機(12)に左右側駆動輪(6,6) を連動
連結してなる作業車の走行駆動装置において、 副変速機(12)と駆動輪(6,6) との間に変速機(13)を介設
し、同変速機(13)は、変速機入力軸(21)と変速機出力軸
(24)とを同軸状態に配置したことを特徴とする作業車の
走行駆動装置。An interlockingly connected hydrostatic transmission (11) is connected to the prime mover (10), and an auxiliary transmission (12) is interlockedly connected to the hydrostatically driven transmission (11). ) And the left and right drive wheels (6, 6) are interlocked to each other in a traveling drive device for a work vehicle, and a transmission (13) is interposed between the auxiliary transmission (12) and the drive wheels (6, 6). The transmission (13) has a transmission input shaft (21) and a transmission output shaft.
And (24) are arranged coaxially with each other.
変速機出力軸(24)とを遊星変速機構(40)を介して連動連
結して、変速可能に構成したことを特徴とする請求項１
記載の作業車の走行駆動装置。2. The transmission (13) is configured such that a transmission input shaft (21) and a transmission output shaft (24) are interlockingly connected to each other via a planetary transmission mechanism (40) so as to be capable of shifting. Claim 1 characterized by the following:
A traveling drive device for the working vehicle according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27353297A JPH1191377A (en) | 1997-09-19 | 1997-09-19 | Travel driving device of working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27353297A JPH1191377A (en) | 1997-09-19 | 1997-09-19 | Travel driving device of working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1191377A true JPH1191377A (en) | 1999-04-06 |
Family
ID=17529165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27353297A Pending JPH1191377A (en) | 1997-09-19 | 1997-09-19 | Travel driving device of working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1191377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697137A (en) * | 2012-09-27 | 2014-04-02 | 株式会社久保田 | Paddy field working machine |
-
1997
- 1997-09-19 JP JP27353297A patent/JPH1191377A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697137A (en) * | 2012-09-27 | 2014-04-02 | 株式会社久保田 | Paddy field working machine |
| CN103697137B (en) * | 2012-09-27 | 2019-07-19 | 株式会社久保田 | Working in paddy field |
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