JPH0519064U - Bulldozer travel controller - Google Patents
Bulldozer travel controllerInfo
- Publication number
- JPH0519064U JPH0519064U JP7475391U JP7475391U JPH0519064U JP H0519064 U JPH0519064 U JP H0519064U JP 7475391 U JP7475391 U JP 7475391U JP 7475391 U JP7475391 U JP 7475391U JP H0519064 U JPH0519064 U JP H0519064U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- clutch
- brake
- lever
- backward
- 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
Landscapes
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
(57)【要約】
【目的】 レバーを持ち替えることなく車両の制御でき
るようにして運転操作性を向上させると共に、構造を簡
素化するもの。
【構成】 車両の前後進、および左右旋回の各操作を、
１本の操作レバー１で行うようにしたブルドーザの走行
制御装置において、操作レバー１に、左右旋回の操作を
圧力比例制御弁２の制御に連動させるリンケージ３と、
前後進の操作をミッション制御弁４の前後進スプール５
の制御に連動させるリンケージ６とをそれぞれ設け、圧
力比例制御弁２と、クラッチ７およびブレーキ８の間
に、圧力比例制御弁２からの油圧で直接クラッチ７およ
びブレーキ８を作動させる油圧回路９ａ，９ｂを設けた
もの。
【効果】 １本レバーにより前後進および左右旋回が制
御できると共に、左右旋回においては圧力比例制御弁の
油圧源で直接クラッチおよびブレーキを作動させること
ができる。
(57) [Summary] [Purpose] The purpose is to control the vehicle without changing the lever, which improves the driving operability and simplifies the structure. [Composition] Forward and backward movement of the vehicle and left and right turning operations
In a travel control device for a bulldozer, which is configured to be performed by one operation lever 1, a linkage 3 that causes the operation lever 1 to interlock a control of a pressure proportional control valve 2 with a left / right turning operation,
Forward / backward operation is performed by the forward / backward spool 5 of the mission control valve 4.
A hydraulic circuit 9a for directly operating the clutch 7 and the brake 8 with the hydraulic pressure from the pressure proportional control valve 2 between the pressure proportional control valve 2 and the clutch 7 and the brake 8. 9b is provided. [Effects] Forward / backward and left / right turning can be controlled by the single lever, and in the left / right turning, the clutch and brake can be directly operated by the hydraulic power source of the pressure proportional control valve.
Description
【０００１】[0001]
本考案は油圧式クラッチおよびブレ−キを有するブルド−ザの走行制御装置に 係り、特に１本の操作レバ−の操作で前後進、左右旋回を可能としたブルド−ザ の走行制御装置に関する。 The present invention relates to a travel control device for a bulldozer having a hydraulic clutch and a brake, and more particularly to a travel control device for a bulldozer capable of moving forward and backward and turning left and right by operating a single operating lever.
【０００２】[0002]
従来からブルド−ザの走行制御装置としては図３、図４に示すように左右別々 のステアリングレバ−３１ａ，３１ｂと、１本の前後進および変速レバ−３２と があり、これらレバ−をそれぞれ動かすことにより各レバ−に連結されたクラッ チ３３やブレ−キ３４をＯＮ，ＯＦＦ作動させて左右旋回を行い、あるいはミッ ション制御弁３５のスプ−ル３６，３８を作動させて前後進や変速を行う仕組み となっている。図３中、３７はステアリングバルブ、図４中、３６は前後進スプ −ル、３８は変速スプ−ルである。 Conventionally, as a travel control device for a bulldozer, as shown in FIGS. 3 and 4, left and right steering levers 31a and 31b and one forward and backward and shift lever 32 are provided, and these levers are respectively provided. By moving it, the clutch 33 and the brake 34 connected to each lever are turned on and off to turn left and right, or the spools 36 and 38 of the mission control valve 35 are operated to move forward and backward. It has a mechanism to shift gears. In FIG. 3, 37 is a steering valve, 36 is a forward-reverse spool, and 38 is a shift spool in FIG.
【０００３】[0003]
しかしてこれら各レバ−の配置は図５に示すようにオペレ−タシ−ト３９の前 に左右のステアリングレバ−３１ａ，３１ｂがあり、また変速レバ−３２はオペ レ−タシ−ト３９の左側に位置するように設けられている。したがって車両の動 く方向（前進、後進、右旋回、左旋回）を例えば前進から右旋回に変更するよう な制御の場合には前記のレバ−の持ち替えが必要となり、操作が面倒になると云 う問題があった。また、左右旋回の操作にパイロット圧として圧力比例制御弁を 使う場合においても、圧力比例制御弁に使用する油圧源と操向クラッチ・ブレ− キを作動させる制御弁の油圧源とは別体のものになり、構造が複雑になると云う 欠点があった。 As shown in FIG. 5, the left and right steering levers 31a and 31b are provided in front of the operator sheet 39, and the shift lever 32 is located on the left side of the operator sheet 39. It is provided to be located in. Therefore, in the case of control such as changing the moving direction of the vehicle (forward, reverse, right turn, left turn) from forward to right turn, it is necessary to change the lever and the operation becomes troublesome. There was a problem to say. Even when the pressure proportional control valve is used as the pilot pressure for turning left and right, the hydraulic source used for the pressure proportional control valve and the hydraulic source for the control valve for operating the steering clutch / brake are separate units. However, there was a drawback that the structure became complicated and the structure became complicated.
【０００４】 本考案はこれに鑑み、レバ−を持ち替えることなく車両の制御できるようにし て運転操作性を向上させると共に、構造を簡素化することのできるブルド−ザの 走行制御装置を提供して従来技術の持つ欠点の解消を図ることを目的としてなさ れたものである。In view of this, the present invention provides a travel control device for a bulldozer, which enables control of a vehicle without changing the lever and improves driving operability and simplifies the structure. The purpose is to eliminate the drawbacks of the conventional technology.
【０００５】[0005]
上記従来技術の問題点を解決する手段として本考案は、車両の前後進、および 左右旋回の各操作を、１本の操作レバ−で行うようにしたブルド−ザの走行制御 装置において、前記操作レバ−に、左右旋回の操作を圧力比例制御弁の制御に連 動させるリンケ−ジと、前後進の操作をミッション制御弁の前後進スプ−ルの制 御に連動させるリンケ−ジとをそれぞれ設け、前記圧力比例制御弁と、クラッチ およびブレ−キの間に、圧力比例制御弁からの油圧で直接該クラッチおよびブレ −キを作動させる油圧回路を設けたことを特徴とする。 As a means for solving the above-mentioned problems of the prior art, the present invention provides a travel control device for a bulldozer in which each operation of forward / backward and left / right turning of a vehicle is performed by a single operation lever. The lever has a linkage that links the operation of turning left and right with the control of the pressure proportional control valve, and a linkage that links the operation of forward and reverse movements with the control of the forward and backward movement spools of the mission control valve. A hydraulic circuit for directly operating the clutch and the brake with the hydraulic pressure from the pressure proportional control valve is provided between the pressure proportional control valve and the clutch and the brake.
【０００６】[0006]
上記構成によれば、車両の前後進、および左右旋回の各操作は１本の操作レバ −で行えるから従来のように各操作の切り替え時、操作レバ−を持ち替えること がなくなり、したがって運転操作性も向上できる。 According to the above configuration, since the vehicle can be operated to move forward and backward and to turn left and right with a single operating lever, it is not necessary to change over the operating lever when switching between operations as in the conventional case, and therefore driving operability is improved. Can be improved.
【０００７】[0007]
図１は本考案にかかるブルド−ザの走行制御装置の一実施例を示す操作系統図 である。 FIG. 1 is an operation system diagram showing an embodiment of a travel control device for a bulldozer according to the present invention.
【０００８】 本考案にかかるブルド−ザの走行制御装置は図１に示すように図示しない車両 の前後進、および左右旋回の各操作を、１本の操作レバ−１で行うようにしたブ ルド−ザの走行制御装置において、前記操作レバ−１に、左右旋回の操作を圧力 比例制御弁２の制御に連動させるリンケ−ジ３と、前後進の操作をミッション制 御弁４の前後進スプ−ル５の制御に連動させるリンケ−ジ６とをそれぞれ設け、 前記圧力比例制御弁２と、クラッチ７およびブレ−キ８の間に、圧力比例制御弁 ２からの油圧で直接該クラッチ７およびブレ−キ８を作動させる油圧回路９ａ， ９ｂを設けたものにより構成されている。As shown in FIG. 1, the traveling control device for a bulldozer according to the present invention is a blind in which the forward and backward movements and the left and right turns of a vehicle (not shown) are performed by a single operation lever-1. In the traveling control device of the above, the operation lever-1 includes a linkage 3 for interlocking a left / right turning operation with a control of the pressure proportional control valve 2 and a forward / backward movement of the mission control valve 4 for forward / backward movement. -A linkage 6 for interlocking with the control of the control valve 5 is provided, and the clutch 7 and the brake 7 are directly connected between the pressure proportional control valve 2 and the clutch 7 and the brake 8 by the hydraulic pressure from the pressure proportional control valve 2. The brake circuit 8 is provided with hydraulic circuits 9a and 9b for operating the brake 8.
【０００９】 前記操作レバ−１は一方は十字継手６ａ等を含むリンケ−ジ６を介してミッシ ョン制御弁４の前後進スプ−ル５に連結されており、他方はリンケ−ジ３を介し て圧力比例制御弁２に連結されている。圧力比例制御弁２はクラッチ７およびブ レ−キ８の作動を制御するもので操作レバ−１の傾きの度合により作動する圧力 が増減するようになっており、上面に設けたステム１０の頂部の一側が押される と図示しないパイロットポンプからの油は圧力比例制御弁２を経て油圧回路９ａ ，９ｂの何れかに流れて、流れた側のクラッチ７およびブレ−キ８をＯＦＦ，Ｏ Ｎ作動するように連結されている。前記クラッチ７は左右一対でそれぞれクラッ チ板１１ａ，１１ｂ，クラッチピストン１２ａ，１２ｂ、およびクラッチ板１１ ａ，１１ｂを常時は係合しているばね１３で構成され、ブレ−キ８も左右一対で それぞれ左右のブレ−キシリンダ１４ａ，１４ｂ，ブレ−キレバ−１５ａ，１５ ｂおよび図示しないドラムを締めるバンド１６ａ，１６ｂ等で構成されている。 また、前記リンケ−ジ６の途中には変速レバ−１７が平行して設けられ、この変 速レバ−１７はリンケ−ジ１８を介して前記ミッション制御弁４の変速スプ−ル １９に連結されている。図２は本考案による操作レバ−１と変速レバ−１７とを 接近させて配置した状態を示すもので、２０はオペレ−タシ−ト、２１は作業機 の操作レバ−である。One of the operation levers 1 is connected to the forward / reverse scroll 5 of the mission control valve 4 via a linkage 6 including a cross joint 6a and the like, and the other is connected to the linkage 3 by the linkage lever 6. It is connected to the pressure proportional control valve 2 via. The pressure proportional control valve 2 controls the operation of the clutch 7 and the brake 8, and the operating pressure increases or decreases depending on the degree of inclination of the operation lever-1. The top of the stem 10 provided on the upper surface is controlled. When one side is pushed, the oil from the pilot pump (not shown) flows through the pressure proportional control valve 2 to either of the hydraulic circuits 9a and 9b, and the clutch 7 and the brake 8 on the flowing side are turned off and the ON operation is performed. Are linked together. The clutch 7 is composed of a pair of left and right clutch plates 11a and 11b, clutch pistons 12a and 12b, and a spring 13 that constantly engages the clutch plates 11a and 11b. The left and right break cylinders 14a and 14b, the break levers 15a and 15b, and bands 16a and 16b for tightening a drum (not shown) are provided. Further, a shift lever 17 is provided in parallel in the middle of the linkage 6, and the shift lever 17 is connected to a shift spool 19 of the mission control valve 4 via a linkage 18. ing. FIG. 2 shows a state in which the operation lever-1 and the shift lever 17 according to the present invention are arranged close to each other. Reference numeral 20 is an operator sheet, and 21 is an operation lever of a working machine.
【００１０】 つぎに作用を説明する。図１において中立の位置から右旋回のために、右側の クラッチを切る場合には、操作レバ−１を右旋回の方に傾けると、リンケ−ジ３ を介して、圧力比例制御弁２の上部に設けられているステム１０の頂部の一側１ ０ａが押されて圧力比例制御弁２は中立位置から切り換えられ、したがって図示 しないパイロットポンプからの油圧は油圧回路９ａから、まず、クラッチピスト ン１２ａに作動してクラッチ板１１ａをばね１３に抗してクラッチ７をＯＦＦの 状態とし、つぎにブレ−キシリンダ１４ａがばねに抗して加圧されるとブレ−キ レバ−１５ａはブレ−キバンド１６ａを締める方に作動するのでブレ−キ８がＯ Ｎの状態となる。したがって車両は右側の足回りが止まるので左側の足回りの走 行により右旋回となる。左旋回の場合は上述と逆の操作により行える。また、前 進の場合は操作レバ−１を前に倒すと圧力比例制御弁２は動かず、リンケ−ジ６ を介してミッション制御弁４の前後進スプ−ル５が前進に切り換えられ、車両は 前進する。この場合、速度段を変更するには変速レバ−１７を操作すると、ミッ ション制御弁４の変速スプ−ル１９が移動することにより図示しないミッション の変速クラッチが切り換えられ、所望の速度が得られる。Next, the operation will be described. In FIG. 1, when the right clutch is disengaged for turning to the right from the neutral position, if the operation lever-1 is tilted to the right, the pressure proportional control valve 2 is moved through the linkage 3. The pressure proportional control valve 2 is switched from the neutral position by pushing one side 10a of the top of the stem 10 provided at the upper part of the stem 10. Therefore, the hydraulic pressure from the pilot pump (not shown) is first supplied from the hydraulic circuit 9a to the clutch piston. When the brake cylinder 14a is actuated by the brake cylinder 12a to turn the clutch 7 off against the spring 13 and the brake cylinder 14a is pressed against the spring, the brake lever 15a is braked. Since the brake band 16a operates toward tightening, the brake 8 is in the ON state. Therefore, since the undercarriage on the right side of the vehicle stops, the vehicle turns to the right by running on the underbody on the left side. In the case of turning to the left, it can be performed by the reverse operation to the above. Further, in the case of the forward drive, if the operation lever-1 is tilted forward, the pressure proportional control valve 2 does not move, and the forward / backward scroll 5 of the mission control valve 4 is switched to the forward drive via the linkage 6 and the vehicle is moved forward. Moves forward. In this case, when the shift lever 17 is operated to change the speed stage, the shift spool of the mission control valve 4 moves to switch the shift clutch of a transmission (not shown) to obtain a desired speed. ..
【００１１】[0011]
本考案は以上説明したように、車両の前後進、および左右旋回の各操作を、１ 本の操作レバ−で行うようにしたブルド−ザの走行制御装置において、前記操作 レバ−に、左右旋回の操作を圧力比例制御弁の制御に連動させるリンケ−ジと、 前後進の操作をミッション制御弁の前後進スプ−ルの制御に連動させるリンケ− ジとをそれぞれ設け、前記圧力比例制御弁と、クラッチおよびブレ−キの間に、 圧力比例制御弁からの油圧で直接該クラッチおよびブレ−キを作動させる油圧回 路を設けたから、１本レバ−により前後進および左右旋回が制御できると共に、 左右旋回においては圧力比例制御弁の油圧源を直接クラッチおよびブレ−キに作 動されることができ、運転性の向上に加えて構造も簡素化される。 As described above, the present invention provides a travel control device for a bulldozer in which each operation of forward and backward and left and right turns of a vehicle is performed by a single operation lever. And a linkage for interlocking the forward / reverse operation with the control of the forward / reverse spool of the mission control valve, respectively. Since a hydraulic circuit for directly operating the clutch and brake with the hydraulic pressure from the pressure proportional control valve is provided between the clutch and the brake, forward and backward and left and right turning can be controlled by one lever, and When turning left and right, the hydraulic power source of the pressure proportional control valve can be directly actuated by the clutch and the brake, which not only improves drivability but also simplifies the structure.
【図１】本考案にかかるブルド−ザの走行制御装置の一
実施例を示す操作系統の説明図である。FIG. 1 is an explanatory diagram of an operation system showing an embodiment of a travel control device for a bulldozer according to the present invention.
【図２】図１の操作レバ−の配置を前部上面から見た斜
視による説明図である。FIG. 2 is a perspective view of the arrangement of the operation lever shown in FIG. 1 as seen from the front upper surface.
【図３】従来のステアリングレバ−による操作系統の説
明図である。FIG. 3 is an explanatory diagram of an operation system using a conventional steering lever.
【図４】従来の前後進および変速レバ−による操作系統
の説明図である。FIG. 4 is an explanatory diagram of a conventional operation system using forward and backward and shift levers.
【図５】図３，図４の操作レバ−の配置を前部上面から
見た斜視による説明図である。FIG. 5 is an explanatory perspective view of the arrangement of the operation levers of FIGS. 3 and 4 as seen from the front upper surface.
１ 操作レバ− ２ 圧力比例制御弁 ３ リンケ−ジ ４ ミッション制御弁 ５ 前後進スプ−ル ６ リンケ−ジ ７ クラッチ ８ ブレ−キ ９ａ，９ｂ 油圧回路 1 Operation lever 2 Pressure proportional control valve 3 Linkage 4 Mission control valve 5 Forward / reverse spool 6 Linkage 7 Clutch 8 Break 9a, 9b Hydraulic circuit
Claims (1)
を、１本の操作レバ−で行うようにしたブルド−ザの走
行制御装置において、前記操作レバ−に、左右旋回の操
作を圧力比例制御弁の制御に連動させるリンケ−ジと、
前後進の操作をミッション制御弁の前後進スプ−ルの制
御に連動させるリンケ−ジとをそれぞれ設け、前記圧力
比例制御弁と、クラッチおよびブレ−キの間に、圧力比
例制御弁からの油圧で直接該クラッチおよびブレ−キを
作動させる油圧回路を設けたことを特徴とするブルド−
ザの走行制御装置。1. A travel control device for a bulldozer, wherein a forward operation and a leftward turning of a vehicle are performed by a single operating lever, wherein the leftward turning operation is applied to the operating lever. A linkage that is linked to the control of the proportional control valve,
Linkages for interlocking forward / backward operation with control of forward / backward spool of the mission control valve are provided respectively, and hydraulic pressure from the pressure proportional control valve is provided between the pressure proportional control valve and the clutch and brake. And a hydraulic circuit for directly operating the clutch and the brake.
The traveling control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7475391U JPH0519064U (en) | 1991-08-23 | 1991-08-23 | Bulldozer travel controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7475391U JPH0519064U (en) | 1991-08-23 | 1991-08-23 | Bulldozer travel controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0519064U true JPH0519064U (en) | 1993-03-09 |
Family
ID=13556345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7475391U Pending JPH0519064U (en) | 1991-08-23 | 1991-08-23 | Bulldozer travel controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0519064U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578127B2 (en) * | 1972-04-05 | 1982-02-15 |
-
1991
- 1991-08-23 JP JP7475391U patent/JPH0519064U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578127B2 (en) * | 1972-04-05 | 1982-02-15 |
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