JPS59126154A - Travelling speed change gear for full-turning system vehicle - Google Patents

Travelling speed change gear for full-turning system vehicle

Info

Publication number
JPS59126154A
JPS59126154A JP57234379A JP23437982A JPS59126154A JP S59126154 A JPS59126154 A JP S59126154A JP 57234379 A JP57234379 A JP 57234379A JP 23437982 A JP23437982 A JP 23437982A JP S59126154 A JPS59126154 A JP S59126154A
Authority
JP
Japan
Prior art keywords
motors
changing
variable hydraulic
full
hydraulic motor
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
JP57234379A
Other languages
Japanese (ja)
Inventor
Hideo Tsurumaru
鶴丸 英雄
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.)
Yanmar Co Ltd
Original Assignee
Yanmar Diesel Engine 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 Yanmar Diesel Engine Co Ltd filed Critical Yanmar Diesel Engine Co Ltd
Priority to JP57234379A priority Critical patent/JPS59126154A/en
Publication of JPS59126154A publication Critical patent/JPS59126154A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • F16H61/42Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE:To provide an economical and simple structure capable of infinitely variably changing traveling speed by changing infinitely variably the rotational frequency of a variable hydraulic motor with an operating tool such as pedal. CONSTITUTION:Push rods 16, 16 pushed by depressing an accelerator pedal 17 located in a cab on an upper turret supply pressurized oil to hydraulic cylinders 14, 14 from master cylinders 15, 15 so that the swash plate angle of variable hydraulic motors 12, 12 is changed by levers 13, 13 of said motors to change infinitely variably the rotational frequency of said motors 12, 12. Thus, the output of an engine can be effectively utilized with a simple structure and low cost by changing the traveling speed as desired according to drive force while considering the output of the engine.

Description

【発明の詳細な説明】 本発明は、バックホーその信金旋回式車両に使用される
走行変速装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a traveling transmission device used in a backhoe or a Shinkin swing type vehicle.

下部走行体に対して上部旋回体が360度旋画才る、い
わゆる全旋回式車両における走行駆動は、上部旋回体に
装備された油圧ポンプからの吐出油を、上部旋回体と下
部走行体との接続部に設LJられたスイベルジヨイント
を介して左右の走行油圧モータへ供給し、これによって
、クローラ又はホイルを左右独立して駆動するようにし
ている。かかる走行駆動装置において、走行油圧モータ
の回転数を変更して走行速度を変更する手段として、従
来、数個の油圧ポンプの吐出油を合流させて走行油圧モ
ータへ供給し、これによって、モータの回転数を上げ増
速するものが用いられているが、走行速度が増速時と低
速時の2段階にしか変速できず、そのため、走行時負荷
に対して余裕がある場合でも、前記決められた合流量の
範囲外には走行油圧モータへの供給量を増速変更するこ
とができず、エンジン出力を有効に利用できないという
欠点がある。これと異なるものでは、第1図の如く、走
行油圧モータとして可変油圧モータfil (1)を用
い、油圧パイロット用油圧ポンプ(2)からの吐出油を
、高低速切り換え弁(3)を介してこの可変油圧モータ
(11(11を操作するように供給するものがあるが、
この場合でも変速は2段階しか行うことができず、同様
の欠点があるとともに、大型機ではさほど問題ないが、
小型機の場合では、同図の如く専用のポンプ(2)や切
り換え弁が必要となり、コスト高となるとともに、この
ような小型機では寸法の制約が大きく、レイアウトに苦
慮しなければならないといった不都合がある。なお、(
41+41は、可変油圧モータ(11(1)の作動油を
供給する油圧ポンプ、+51 (51はその走行切り換
え弁である。
In a so-called full-swing type vehicle, in which the upper rotating body rotates 360 degrees relative to the lower rotating body, oil discharged from a hydraulic pump installed on the upper rotating body is used to transfer oil between the upper rotating body and the lower rotating body. The oil is supplied to the left and right traveling hydraulic motors through a swivel joint provided at the connecting portion, thereby driving the left and right crawlers or wheels independently. In such a traveling drive device, conventionally, as a means for changing the traveling speed by changing the rotation speed of the traveling hydraulic motor, the discharge oil of several hydraulic pumps is combined and supplied to the traveling hydraulic motor, thereby increasing the speed of the motor. A type that increases the rotation speed and increases the speed is used, but the traveling speed can only be changed to two stages: increasing speed and low speed. There is a drawback that outside the range of the merging amount, the amount supplied to the travel hydraulic motor cannot be increased or changed, and the engine output cannot be used effectively. In a different model, as shown in Fig. 1, a variable hydraulic motor fil (1) is used as the traveling hydraulic motor, and the oil discharged from the hydraulic pilot hydraulic pump (2) is transferred through a high-low speed switching valve (3). There is a variable hydraulic motor (11) that is supplied to operate the
Even in this case, the gears can only be shifted in two stages, which has the same drawbacks, and although this is not a problem for large machines,
In the case of a small machine, a dedicated pump (2) and switching valve are required as shown in the figure, which increases the cost and also has the disadvantage of having to take great care in layout due to large size restrictions for such a small machine. There is. In addition,(
41+41 is a hydraulic pump that supplies hydraulic oil for the variable hydraulic motor (11(1)), +51 (51 is its travel switching valve).

本発明は、かかる全旋回式車両の欠点を解消して、走行
速度を無段階に変速することのできる安価でしかも簡単
な構造の走行変速装置を提供することを目的となされた
もので、その構成として本発明は、可変油圧モータで左
右のクローラ又はホイルを左右独立して駆動する全旋回
式車両において、ペダル等の操作具によって前記可変油
圧モータの回転数を無段階に変更することを特徴とする
ものである。
The present invention has been made with the object of solving the drawbacks of such full-swing vehicles and providing a traveling transmission device that is inexpensive and has a simple structure that can change the traveling speed steplessly. As a structure, the present invention is characterized in that, in a full swing vehicle in which left and right crawlers or wheels are independently driven by variable hydraulic motors, the rotation speed of the variable hydraulic motors is changed steplessly by an operating tool such as a pedal. That is.

以下本発明の構成を図示の一実施例に基づいて説明する
と、左右のクローラ(11)  (11)を駆動する走
行油圧モータ(12)  (12)を、可変油圧モータ
とし、第3図の如く、これらの可変油圧モータ(12)
’  (12)の回転数を変更するレバー(13)(1
3)を、油圧シリンダ(14)  (14)によって行
うこととし、第2図で示すように、これら各油圧シリン
ダ(14)  (14)への圧油の供給を、各々マスタ
シリンダ(15)  (15)によって、スイベルジヨ
イント(16)を介して行うこととする。そして、これ
らのマスクシリンダ(15)  (15)のブツシュロ
ッド(16)  (16)を、上部旋回体における運転
卑に配置された増速ペダル(17)に連結して、該増速
ペダル(17)の踏込みによってブツシュロッド(16
)、 (16)を押し、−マスタシリンダ(15)  
(15)の圧油を油圧シリンダ(14)  (14)に
供給して、可変油圧モータ(12)  (12)のレバ
ー(13)(13)を回動させることにより、例えば、
該可変油圧モータ(12)  (12)の斜板角度を変
更させることによって、該可変油圧モータ(12)  
(12)の回転速度を無段階に変更するものである。な
〜お、第2図では示していないが、各可変油圧モータ(
12)  (12)へ作動油を供給する油圧回路が設け
られることは、第1図と同様である。
The configuration of the present invention will be described below based on an illustrated embodiment. The travel hydraulic motors (12) (12) that drive the left and right crawlers (11) (11) are variable hydraulic motors, as shown in FIG. , these variable hydraulic motors (12)
' Lever (13) to change the rotation speed of (12) (1
3) is performed by the hydraulic cylinders (14) (14), and as shown in FIG. 15) through the swivel joint (16). The bushing rods (16) (16) of these mask cylinders (15) (15) are connected to an accelerating pedal (17) disposed at a driving position in the upper revolving structure, and the accelerating pedal (17) By stepping on the Butsch rod (16
), press (16), - master cylinder (15)
By supplying the pressure oil (15) to the hydraulic cylinders (14) (14) and rotating the levers (13) (13) of the variable hydraulic motor (12) (12), for example,
By changing the swash plate angle of the variable hydraulic motor (12) (12), the variable hydraulic motor (12)
(12) The rotation speed is changed steplessly. Although not shown in Figure 2, each variable hydraulic motor (
12) The provision of a hydraulic circuit for supplying hydraulic oil to (12) is the same as in FIG. 1.

第4図は、本発明の他の実施例であって、第2図実施例
が、各可変−圧モータ(12)  (12)に対応して
、2個のマスクシリンダ(15)  (15)を用いて
いるのに対して、この実施例では1.1個のマスタシリ
ンダ(15)によって両可変油圧モータ(14)  (
14)の油圧シリンダ(12)  (12)へ圧油を供
給したものである。ただし、この実施例では、1個のマ
スクシリンダ(15)からの圧油は、負荷の軽い方へ流
れるため、各クローラ(11)  (11)又はホイル
の負荷が異なる場合には左右可変油圧モータ(12) 
’(12)の回転数が変わり、蛇行を生ずる虞れがある
FIG. 4 shows another embodiment of the invention, in which the embodiment of FIG. 2 has two mask cylinders (15) (15) corresponding to each variable-pressure motor (12) In contrast, in this embodiment, both variable hydraulic motors (14) (
Pressure oil is supplied to the hydraulic cylinders (12) (12) (14). However, in this embodiment, the pressure oil from one mask cylinder (15) flows to the side with the lighter load, so if the loads of the crawlers (11) (11) or the wheels are different, the left and right variable hydraulic motors (12)
There is a possibility that the rotation speed of (12) will change and meandering will occur.

以上の如く本発明によれば、可変油圧モータで左右のク
ローラ又はホイル左右独立して駆動する全旋回式車両に
おいて、可変油圧モータの回転数をペダル等の操作具に
よって無段階に変更するようにしているから、エンジン
の出方を考慮しつつ、駆動力に応じて走行速度を任意に
変更することによりエンジン出力を有効に利用でき、し
がもこれらの低速から高速、或いは、高速から低速への
切り換えをショックを起こすことなくスムーズに行える
という効果が得られる。また、本発明では、実施例でも
示すように、可変油圧モータのレバー等を回動させる油
圧シリンダとマスクシリンダを設ければよいから、従来
の如く高価な専用油圧ポンプや切り換え弁を用いる場合
に比較して、遥かに低コストで実施できる効果がある。
As described above, according to the present invention, in a full swing vehicle in which left and right crawlers or left and right wheels are independently driven by variable hydraulic motors, the rotation speed of the variable hydraulic motors can be changed steplessly using an operating tool such as a pedal. Therefore, the engine output can be used effectively by arbitrarily changing the traveling speed according to the driving force while considering the way the engine outputs. The effect is that the switching can be performed smoothly without causing a shock. In addition, in the present invention, as shown in the embodiments, it is sufficient to provide a hydraulic cylinder and a mask cylinder for rotating the lever of the variable hydraulic motor, so it is not necessary to use an expensive dedicated hydraulic pump or switching valve as in the past. In comparison, it has the effect of being able to be implemented at a much lower cost.

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

第1図は、従来における走行増速回路を示す油圧回路図
、第2図は、本発明実施例を示す概略説明図、第3図は
、可変油圧モータの回転数変更手段を示す概略説明図、
第4図は、本発明の他の実施例を示す概略説明図である
。 (11)−−クローラ、(12) −可変油圧モータ、
(17) −一増速ペダル。 特許 出願人 ヤンマーディーゼル株式会社代理人弁理
士 樽   本   久   幸第1図 第3図 第2図
Fig. 1 is a hydraulic circuit diagram showing a conventional traveling speed increasing circuit, Fig. 2 is a schematic explanatory diagram showing an embodiment of the present invention, and Fig. 3 is a schematic explanatory diagram showing a rotation speed changing means of a variable hydraulic motor. ,
FIG. 4 is a schematic explanatory diagram showing another embodiment of the present invention. (11)--crawler, (12)-variable hydraulic motor,
(17) -One speed up pedal. Patent Applicant: Yanmar Diesel Co., Ltd. Representative Patent Attorney Hisayuki Tarumoto Figure 1 Figure 3 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 可変油圧モータ(12)で左右のクローラ(11)又は
ホイルを駆動する全旋回式車両において、ペダル(17
)等の操作具によって前記可変油圧モータ(12)の回
転数を無段階に変更することを特徴とする全旋回式車両
の走行変速装置。
In a full swing vehicle in which the left and right crawlers (11) or wheels are driven by a variable hydraulic motor (12), the pedal (17)
1. A travel transmission device for a full-swing vehicle, characterized in that the rotational speed of the variable hydraulic motor (12) is changed steplessly by an operating tool such as a controller.
JP57234379A 1982-12-29 1982-12-29 Travelling speed change gear for full-turning system vehicle Pending JPS59126154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57234379A JPS59126154A (en) 1982-12-29 1982-12-29 Travelling speed change gear for full-turning system vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57234379A JPS59126154A (en) 1982-12-29 1982-12-29 Travelling speed change gear for full-turning system vehicle

Publications (1)

Publication Number Publication Date
JPS59126154A true JPS59126154A (en) 1984-07-20

Family

ID=16970077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57234379A Pending JPS59126154A (en) 1982-12-29 1982-12-29 Travelling speed change gear for full-turning system vehicle

Country Status (1)

Country Link
JP (1) JPS59126154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729823A (en) * 2012-06-28 2012-10-17 三一重型装备有限公司 Engineering vehicle and traveling speed control system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729823A (en) * 2012-06-28 2012-10-17 三一重型装备有限公司 Engineering vehicle and traveling speed control system thereof

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