JPS6157457B2 - - Google Patents
Info
- Publication number
- JPS6157457B2 JPS6157457B2 JP53060063A JP6006378A JPS6157457B2 JP S6157457 B2 JPS6157457 B2 JP S6157457B2 JP 53060063 A JP53060063 A JP 53060063A JP 6006378 A JP6006378 A JP 6006378A JP S6157457 B2 JPS6157457 B2 JP S6157457B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- lever
- travel
- engine
- speed control
- 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.)
- Expired
Links
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Fluid-Pressure Circuits (AREA)
Description
【発明の詳細な説明】
本発明はシヨベルやブルドーザのような油圧駆
動型自走作業機の速度制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed control device for a hydraulically driven self-propelled working machine such as a shovel or a bulldozer.
このような自走作業機の出す騒音は、エンジン
の運転音が非常に大きなフアクタを占め、該エン
ジン運転音はエンジン速度に比例して増大するた
め、市街地における作業に際してはエンジン速度
を最大速度より落として使用せねばならぬ現状で
ある。しかしこれでは自走作業機の移動速度が低
下するため、作業現場が広大な場合は、自走作業
機の移動に時間を食われて作業効率が低下するこ
とになる。 The engine operating noise is a very large factor in the noise produced by such self-propelled work machines, and the engine operating noise increases in proportion to the engine speed. The current situation is that you have to drop it and use it. However, this reduces the moving speed of the self-propelled work machine, so if the work site is vast, moving the self-propelled work machine takes time and reduces work efficiency.
本発明はこの問題に対処するもので、走行操作
レバに、走行モータ用方向制御弁を走行位置に先
作動させる順次作動機構を介して、該走行モータ
用方向制御弁と、該走行操作レバの前、後運動を
一方向運動に変換する変換機構とを連結し、該変
換機構の出力端及び任意位置に固定可能な速度制
限操作機構の出力端と、エンジン速度制御機構の
入力端との間を１個の中間レバで連結して、速度
制限操作機構のみを高速側に最大変位させた時
は、エンジン速度制御機構の速度制御部材が一定
の中間速度位置に変位し、又該速度制限操作機構
と走行操作レバとを共に高速側に最大変位させた
時は、エンジン速度制御機構の速度制御部材が最
高速位置に変位するように構成することによつ
て、作業時におけるエンジン騒音の最大限界を速
度制限操作機構の作動位置により規制し、又走行
モータ用方向制御弁の走行位置への切換え後にお
ける走行操作レバの回動によりエンジン速度を最
大速度域いはこれに近い速度まで増大し得るよう
にして、作業機の移動速度を必要に応じ迅速且つ
容易に増大可能とし、前記従来型自走作業機の持
つ欠点を解消したものである。 The present invention addresses this problem by providing a sequential actuation mechanism in which the travel control lever is actuated in advance of the travel motor directional control valve to the travel position. A conversion mechanism that converts forward and backward motion into unidirectional movement is connected, and between the output end of the conversion mechanism, the output end of a speed limit operation mechanism that can be fixed at any position, and the input end of the engine speed control mechanism. When only the speed limiting operation mechanism is maximally displaced to the high speed side by connecting them with one intermediate lever, the speed control member of the engine speed control mechanism is displaced to a constant intermediate speed position, and the speed limiting operation By configuring the speed control member of the engine speed control mechanism to move to the highest speed position when both the mechanism and the travel control lever are moved to the maximum speed side, the maximum limit of engine noise during operation can be reduced. The engine speed is regulated by the operating position of the speed limit operation mechanism, and the engine speed can be increased to the maximum speed range or a speed close to this by rotating the travel control lever after switching the travel motor directional control valve to the travel position. In this way, the moving speed of the working machine can be quickly and easily increased as required, and the drawbacks of the conventional self-propelled working machine are solved.
以下、シヨベルに適用した本発明の一実施例を
第１図及び第２図について説明する。１は車載の
高速デイーゼルエンジン、２，３はクラツチを介
して該エンジン１により同時駆動される同等の定
容量型油圧ポンプ、４は油タンクを示し、油圧ポ
ンプ２は多連方向制御弁５，６，７に圧油を供給
し、又油圧ポンプ３は多連方向制御弁８，９，１
０に圧油を供給する。３位置の方向制御弁５，８
は夫々両側無限軌道を駆動する走行モータ１１，
１２を制御し、又他の方向制御弁は夫々旋回台の
旋回モータ、ブーム俯仰用シリンダ、ブーム先端
のアーム回動用シリンダ、該アーム先端のバケツ
ト回動用シリンダ（図示せず）を制御することは
従来同様である。図中１３，１４は油路を示す。 An embodiment of the present invention applied to a shovel will be described below with reference to FIGS. 1 and 2. 1 is an in-vehicle high-speed diesel engine, 2 and 3 are equivalent fixed displacement hydraulic pumps that are simultaneously driven by the engine 1 via a clutch, 4 is an oil tank, and the hydraulic pump 2 is connected to a multiple directional control valve 5, The hydraulic pump 3 supplies pressure oil to the multiple directional control valves 8, 9, 1.
Supply pressure oil to 0. 3-position directional control valve 5, 8
are traveling motors 11 that drive the endless tracks on both sides, respectively;
12, and the other directional control valves control the swivel motor of the swivel base, the cylinder for raising and lowering the boom, the cylinder for rotating the arm at the tip of the boom, and the cylinder for rotating the bucket at the tip of the arm (not shown), respectively. Same as before. In the figure, 13 and 14 indicate oil passages.
１５，１８は夫々運転席直前に位置させて旋回
台１６に中間部を枢着１７した走行操作レバを示
し、該走行操作レバ１５，１８は夫々順次作動機
構１９，２０を介して対応走行モータ用方向制御
弁５，８と変換機構２１に連結される。 Reference numerals 15 and 18 designate travel control levers which are located directly in front of the driver's seat and whose intermediate portions are pivotally connected 17 to the swivel base 16. It is connected to the directional control valves 5 and 8 and the conversion mechanism 21.
順次作動機構１９は、走行操作レバ１５の下端
に連杆２３を介してレバ２４の中間部を連結し、
該レバ２４外側の短小アーム部分の端末に連杆２
５を介して方向制御弁５のスプールを連結すると
共に、レバ２４内側の長大アーム部分の端末に連
杆２６を連結し、旋回台１６に固定される方向制
御弁５にスプールを常時中立位置或いは走行モー
タ停止位置に復帰賦勢するように取付けたばね機
構（これは省略することもできる）よりも、中立
位置復帰力の強いばね機構を連杆２６と旋回台１
６の間に設けてなる。このばね機構は連杆２６の
途中に固着した鍔２７と、その前後において旋回
台１６に夫々取付けたばね受１６′との間に夫々
圧縮ばね２８を挾持させた所が図示されている。 The sequential actuation mechanism 19 connects the intermediate portion of the lever 24 to the lower end of the traveling operation lever 15 via the connecting rod 23,
A connecting rod 2 is attached to the terminal of the short arm portion on the outside of the lever 24.
The spool of the direction control valve 5 is connected to the spool of the direction control valve 5 via the lever 24, and the connecting rod 26 is connected to the end of the long arm inside the lever 24, so that the spool is always in the neutral position or A spring mechanism that has a stronger return force to the neutral position than a spring mechanism installed to force the travel motor to return to the stop position (this can be omitted) is installed between the connecting rod 26 and the swivel base 1.
It is set between 6. This spring mechanism is shown in which a compression spring 28 is sandwiched between a collar 27 fixed in the middle of the connecting rod 26 and spring receivers 16' attached to the swivel base 16 at the front and rear of the collar 27, respectively.
このため運転者が走行操作レバ１５を第１図の
右方（手前）に引けば、レバ２４のてこ比と中立
位置復帰力の差違とにつて、該レバ２４が連杆２
６の連結部分を支点として第１図鎖線示Ａの位置
に移動して方向制御弁５を後進走行位置に切換え
た後、走行操作レバ１５に更に強い操作力を加え
ることにより、レバ２４が連杆２５の連結部分を
支点としてＢ位置に移動して、連杆２６を第１図
左方に移動させることができる。走行操作レバ１
５を第１図左方に押しても、同様に方向制御弁５
を前進走行位置に切換えた後に連杆２６を第１図
右方に移動させ得る。 Therefore, when the driver pulls the travel control lever 15 to the right (toward the front) in FIG.
After moving the directional control valve 5 to the reverse travel position by using the connecting portion of the travel control lever 15 as a fulcrum and moving the direction control valve 5 to the position indicated by the chain line A in FIG. By using the connecting portion of the rod 25 as a fulcrum, it can be moved to position B, and the connecting rod 26 can be moved to the left in FIG. Travel control lever 1
Even if you push 5 to the left in Figure 1, the directional control valve 5
After switching to the forward travel position, the connecting rod 26 can be moved to the right in FIG.
順次作動機構２０は順次作動機構１９と左右対
称的な同等構成を持ち、走行操作レバ１８により
方向制御弁８を前進或いは後進走行位置に切換え
た後に、該方向制御弁側と反対側の連杆２９を第
１図の右方或いは左方に移動し得る。 The sequential operating mechanism 20 has the same configuration as the sequential operating mechanism 19 and is symmetrical, and after switching the directional control valve 8 to the forward or reverse traveling position by the traveling operation lever 18, the connecting rod on the side opposite to the directional control valve side is switched to the forward or reverse traveling position. 29 can be moved to the right or left in FIG.
変換機構２１は、中間部を夫々旋回台１６に枢
着３０した２個の逆Ｔ型レバ３１と、該逆Ｔ型レ
バの下端に上部板状腕を当接させて旋回台１６に
前端曲がり角を枢着３２したベルクランク３３と
を含み、該両逆Ｔ型レバ３１，３１の上端に夫々
連杆２６，２９が連結され、又ベルクランク３３
の下部腕に連結杆（或いは連結索）２２が連結さ
れる。このため連杆２６，２９が同方向或いは互
いに逆方向に運動しても、ベルクランク３３は枢
着軸３２を中心として時計方向に回動する。３４
は走行操作レバ１５，１８或いは逆Ｔ型レバ３１
が図示の中立位置にある時にベルクランク３３の
反時計方向回動を阻止するように旋回台１６に取
付けたストツパである。 The conversion mechanism 21 includes two inverted T-shaped levers 31 whose intermediate portions are pivotally connected 30 to the swivel base 16, and an upper plate-like arm abutting the lower end of the inverted T-shaped levers to allow the swivel base 16 to bend at the front end. The bell crank 33 includes a bell crank 33 which is pivotally mounted 32, and connecting rods 26 and 29 are connected to the upper ends of the two inverted T-shaped levers 31 and 31, respectively.
A connecting rod (or connecting rope) 22 is connected to the lower arm of the connecting rod (or connecting rope) 22. Therefore, even if the connecting rods 26 and 29 move in the same direction or in opposite directions, the bell crank 33 rotates clockwise about the pivot shaft 32. 34
is the traveling operation lever 15, 18 or the inverted T-shaped lever 31.
This is a stopper attached to the swivel base 16 so as to prevent the bell crank 33 from rotating counterclockwise when the bell crank 33 is in the neutral position shown.
３５は走行操作レバ１５，１８と共に旋回台１
６の運転席近くに枢着３６した速度制限操作機構
の操作レバを示し該操作レバ３５に対し、枢着軸
３６方向の摺動自在に旋回台１６側に取付けた摩
擦板３７を常時ばね（図示せず）で押付けさせる
ことによつて、速度制限操作レバ３５は任意角度
位置に摩擦的に固定される。３８は旋回台１６に
固定した制限速度選択用の目盛板である。 35 is the swivel base 1 along with the traveling operation levers 15 and 18.
A friction plate 37 attached to the swivel base 16 so as to be slidable in the direction of the pivot shaft 36 is always connected to the operating lever 35 by a spring ( (not shown), the speed limiting operation lever 35 is frictionally fixed at an arbitrary angular position. 38 is a scale plate fixed to the rotating base 16 for selecting a speed limit.
３９はエンジン１に附設したエンジン速度制御
機構（メカニカルガバナ）４０の速度制御部材
（スピードコントロールレバ）で、該速度制御部
材３９は該エンジン或いは旋回台１６に枢支４１
されて、ガバナスプリング４２により常時ストツ
パ４３に係合する速度零位置０に復帰賦勢され、
該速度制御部材３９がストツパ４４に係合する回
動位置Ｍにおいて燃料噴射量或いはエンジン速度
が最大となる。尚メカニカルガバナ４０が別にロ
ードコントロールレバ（図示せず）を備え、該ロ
ードコントロールレバを運転席より制御し得るよ
うにしていることは従来同様である。 39 is a speed control member (speed control lever) of an engine speed control mechanism (mechanical governor) 40 attached to the engine 1;
and is urged to return to the speed zero position 0 where it is constantly engaged with the stopper 43 by the governor spring 42,
At the rotational position M where the speed control member 39 engages with the stopper 44, the fuel injection amount or engine speed becomes maximum. It should be noted that, as in the prior art, the mechanical governor 40 is provided with a separate load control lever (not shown), which can be controlled from the driver's seat.
４５は演算機構を形成する中間レバを示し、該
中間レバ４５の一端には連結杆２２が連結され、
又その他端は連結杆２２と略平行な連結杆４６を
介して速度制限操作レバ３５の下端に連結され
る。４７は中間レバ４５の中間部と速度制御部材
３９の間を連結する連結杆（或いは連結索）で、
該連結杆４７は速度制御部材３９の回動変位に応
じ連結杆２２，４６と略平行な軸線方向に変位す
る。４８は中間レバ４５に対する連結杆４６の連
結ピンの移動方向を連結杆４７と略平行に案内す
るように旋回台側に取付けた枠状案内レールで、
該枠状案内レール４８は速度制限操作レバ３５の
回動範囲を所定範囲内に限定する。 Reference numeral 45 indicates an intermediate lever forming a calculation mechanism, and a connecting rod 22 is connected to one end of the intermediate lever 45.
The other end is connected to the lower end of the speed limit operating lever 35 via a connecting rod 46 that is substantially parallel to the connecting rod 22. 47 is a connecting rod (or connecting cable) connecting between the intermediate portion of the intermediate lever 45 and the speed control member 39;
The connecting rod 47 is displaced in an axial direction substantially parallel to the connecting rods 22 and 46 in accordance with the rotational displacement of the speed control member 39. Reference numeral 48 denotes a frame-shaped guide rail attached to the swivel base so as to guide the moving direction of the connecting pin of the connecting rod 46 with respect to the intermediate lever 45 in substantially parallel to the connecting rod 47;
The frame-shaped guide rail 48 limits the rotation range of the speed limit operation lever 35 to within a predetermined range.
上記構成において、運転者が速度制限操作レバ
３５を第１図鎖線示のように制限最大速度位置に
回動すれば、連結杆４７はガバナスプリング４２
により常時右方に引かれ、且つベルクランク３３
はストツパ３４に係合しているため、中間レバ４
５は連結杆２２への枢着ピンを中心としてＣ位置
に傾動して、速度制御部材３９をＤ位置に回動す
る。従つてこのＤ位置が市街地で許されるエンジ
ン騒音の最大限界に対応した速度位置になるよう
に、中間レバ４５のレバ比などを予め設定してお
くことにより、ガバナ４０のロードコントロール
レバをフルロード位置に固定し、速度制御部材３
９を速度制限操作レバ３５により操作してガバナ
４０をオールスピードガバナとして機能させ、エ
ンジン１を低騒音の動力用として用い、通常のシ
ヨベル作業を行わせ得る。 In the above configuration, when the driver rotates the speed limit operation lever 35 to the maximum speed limit position as shown by the chain line in FIG.
is always pulled to the right by the bell crank 33.
is engaged with the stopper 34, so the intermediate lever 4
5 tilts to the C position about the pivot pin to the connecting rod 22, and rotates the speed control member 39 to the D position. Therefore, by setting the lever ratio of the intermediate lever 45 in advance so that this D position corresponds to the maximum engine noise limit allowed in urban areas, the load control lever of the governor 40 can be set to full load. Fixed in position, speed control member 3
9 is operated by the speed limit operation lever 35 to cause the governor 40 to function as an all-speed governor, and the engine 1 can be used for low-noise power to perform normal shovel work.
又シヨベルの走行に際し、速度制限操作レバ３
５を最大速度位置にした後、エンジンを最高速に
したい場合は、方向制御弁５，８を走行位置に切
換えた後、更に走行操作レバ１５，１８をより強
く操作すれば、順次作動機構１９，２０と変換機
構２１を介して連結杆２２が第１図左方に引か
れ、一方速度制限操作レバ３５は摩擦的に固定さ
れて連結杆４６の軸線方向移動を拘束しているた
め、中間レバ４５が該連結杆４６への連結部分を
支点としてＣ位置よりＦ位置に回動し、速度制御
部材３９を最高速位置Ｍに回動することができ
る。従つてロードコントロールレバの操作と相俟
つてガバナ４０をミニマムマキシマムガバナとし
て機能させ、エンジン１を最高速として迅速に移
動することができる。尚各操作レバ１５，１８に
は、該両操作レバを片手で同時操作し得るように
副レバ部分１５′，１８′を設けておくのがよい。 Also, when the excavator is running, the speed limit operation lever 3
5 to the maximum speed position, if you want the engine to reach its maximum speed, after switching the directional control valves 5 and 8 to the travel position, operate the travel operation levers 15 and 18 more forcefully, and the operating mechanism 19 will be activated in sequence. , 20 and the conversion mechanism 21, the connecting rod 22 is pulled to the left in FIG. The lever 45 can rotate from the C position to the F position using the connecting portion to the connecting rod 46 as a fulcrum, and the speed control member 39 can be rotated to the highest speed position M. Therefore, in combination with the operation of the load control lever, the governor 40 functions as a minimum/maximum governor, and the engine 1 can be moved at the highest speed to quickly move. Incidentally, each operating lever 15, 18 is preferably provided with a sub-lever portion 15', 18' so that both operating levers can be operated simultaneously with one hand.
以上一実施例について説明したが、連結杆４７
を中間レバ４５の中間部に連結することは、何等
本発明の必要条件ではなく、第３図に示すように
中間レバ４５ｂの一端に速度制御部材３９側の連
結杆４７を連結することもできる。この場合は変
換機構２１のベルクランク３３ｂやストツパ３４
ｂを第１図と前後逆向き配置にして、該ベルクラ
ンク側の連結杆２２を中間レバ４５ｂの他端に連
結し、該中間レバの中間部と速度制限操作レバ３
５の間を連結杆４６で連結するなどすれば、速度
制限操作レバ３５を操作して連結杆４６を第３図
左方に引く時は、中間レバ４５ｂの他端が連結杆
２２、ベルクランク３３ｂを介してストツパ３４
ｂに支持されるから、該中間レバをＣ位置に回動
することができ、又走行操作レバによりベルクラ
ンク３３ｂを第３図鎖線示のように回動した時
は、連結杆２２を介して中間レバ４５ｂをＦ位置
に押圧回動して速度制御部材３９を最高速位置に
することができる。 Although one embodiment has been described above, the connecting rod 47
It is not a necessary condition of the present invention to connect the intermediate lever 45 to the intermediate portion of the intermediate lever 45, and it is also possible to connect the connecting rod 47 on the speed control member 39 side to one end of the intermediate lever 45b as shown in FIG. . In this case, the bell crank 33b of the conversion mechanism 21 and the stopper 34
b is arranged in the front and rear directions opposite to that in FIG.
5 are connected by a connecting rod 46, when operating the speed limit operation lever 35 and pulling the connecting rod 46 to the left in FIG. Stopper 34 via 33b
b, so that the intermediate lever can be rotated to the C position, and when the bell crank 33b is rotated as shown by the chain line in FIG. By pressing and rotating the intermediate lever 45b to the F position, the speed control member 39 can be placed at the highest speed position.
又変換機構２１も第１図或いは第３図の構成に
限定されるものではなく第４図のようにすること
もできる。即ち旋回台１６に摺動自在に取付けた
連杆２６と連杆２９の出力端に夫々２本のリンク
４９，５０の一端を枢着５１し、該連杆２６，２
９に夫々対向して、旋回台に軸支３２させた筒状
軸５２の両端に夫々ベルクランク５３を固着し、
該各ベルクランク５３の上下端に夫々筒状軸５２
と同心の円弧状長孔５４，５５を穿設し、該円弧
状長孔５４，５５の互いに反対側端末にリンク４
９，５０の他端に夫々植設したピン５６，５７を
係合させて、連杆２６，２９の正、逆摺動変位を
筒状軸５２の矢印方向回転変位に変換するように
し、該筒状軸５２に固着したアーム５８と中間レ
バ４５端末の間を連結杆２２で連結する。 Further, the conversion mechanism 21 is not limited to the configuration shown in FIG. 1 or 3, but may also be configured as shown in FIG. 4. That is, one ends of two links 49 and 50 are pivotally attached 51 to the output ends of the connecting rods 26 and 29 that are slidably attached to the swivel base 16, and the connecting rods 26 and 2
A bell crank 53 is fixed to each end of a cylindrical shaft 52 which is supported 32 on a swivel base, facing each of the bell cranks 9.
A cylindrical shaft 52 is provided at the upper and lower ends of each bell crank 53, respectively.
Arc-shaped elongated holes 54, 55 concentric with the arc-shaped elongated holes 54, 55 are bored, and links 4 are formed at mutually opposite ends of the arc-shaped elongated holes 54, 55.
The pins 56 and 57 implanted at the other ends of the rods 9 and 50 are engaged to convert the positive and reverse sliding displacements of the connecting rods 26 and 29 into rotational displacements of the cylindrical shaft 52 in the direction of the arrow. The arm 58 fixed to the cylindrical shaft 52 and the terminal of the intermediate lever 45 are connected by a connecting rod 22.
更に順次作動機構１９或いは２０も第１図の構
成に限定されるものではなく、第５図のようにす
ることもできる。第５図においては、走行操作レ
バ１５，１８が夫々旋回台１６に中間部を枢着１
７した第１レバ５９の上端に逆Ｔ型の第２レバ６
０を枢着６１してなり、該逆Ｔ型第２レバ６０の
下端両側と旋回台１６に上端中央を枢架３０した
工程レバ３１ｂの上端両側との間を夫々ボーデン
索６２，６３で連結し、該ボーデン索外管６
２′，６３′の端末を固定する第１レバ５９の腕６
４の両側と、逆Ｔ型第２レバ６０の下端両側との
間に夫々該第１、第２のレバを図示の直線状態に
保持するばね６５，６６を取付け、第１レバ５９
の下端に連杆２５を介して走行モータ用方向制御
弁５或いは８のスプールを連結して、該方向制御
弁を中立位置復帰力に抗して切換える際は、第
１、第２のレバ５９，６０をばね６５，６６の弾
力で鎖線示Ｓのように直線状態に保持させてい
る。従つてＳ状態から更に強い操作力を加える
と、鎖線示Ｔのように第２レバ６０が第１レバ５
９に対し屈折して工型レバ３１ｂを鎖線のように
回動し得る。尚第３図〜第５図中、第１図と同一
符号を附した部材は相対応する部材を示すものと
する。 Further, the sequential operation mechanism 19 or 20 is not limited to the configuration shown in FIG. 1, but may also be configured as shown in FIG. 5. In FIG. 5, the traveling operation levers 15 and 18 each have their intermediate portions pivoted to the swivel base 16.
An inverted T-shaped second lever 6 is attached to the upper end of the first lever 59.
Both sides of the lower end of the inverted T-shaped second lever 60 and both sides of the upper end of the process lever 31b whose upper end center is pivoted 30 on the swivel table 16 are connected by Bowden cables 62 and 63, respectively. and the Bowden extrachordal canal 6
The arm 6 of the first lever 59 fixes the terminals of 2' and 63'.
4 and both sides of the lower end of the inverted T-shaped second lever 60, springs 65 and 66 are installed to hold the first and second levers in the straight line state shown in the figure, respectively.
The spool of the travel motor directional control valve 5 or 8 is connected to the lower end of the lever 59 via the connecting rod 25, and when switching the directional control valve against the neutral position return force, the first and second levers 59 , 60 are held in a straight line as shown by chain lines S by the elasticity of springs 65 and 66. Therefore, when a stronger operating force is applied from the S state, the second lever 60 moves to the first lever 5 as shown by the chain line T.
9, and the mold lever 31b can be rotated as shown by the chain line. In FIGS. 3 to 5, members given the same reference numerals as those in FIG. 1 indicate corresponding members.
本発明によれば、エンジンを最高速にし得るの
は走行操作レバを操作した時だけであるから、自
走作業機が通常の作業をする場合は、エンジン速
度を制限してエンジン騒音の発生を一定限度以下
に抑えることができ、しかも自走作業機が走行す
る際は、エンジンに許容される最高速度にまで速
度を上げて迅速に移動させることができる。 According to the present invention, the engine can reach its maximum speed only when the travel control lever is operated, so when the self-propelled work machine performs normal work, the engine speed is limited to prevent engine noise. The speed can be kept below a certain limit, and when the self-propelled working machine is running, it can be moved quickly by increasing the speed to the maximum speed allowed by the engine.
第１図は本発明一実施例の斜視図、第２図は本
発明装置が関連する油圧回路の概略図、第３図は
演算機構の変型例を示す図、第４図は変換機構の
変型例を示す図、第５図は順次作動機構の変型例
を示す図である。
１……高速デイーゼルエンジン、２，３……定
容量型油圧ポンプ、５，８……走行モータ用方向
制御弁、１１，１２……走行モータ、１５，１８
……走行操作レバ、１９，２０……順次作動機
構、２１……変換機構、３５……速度制限操作レ
バ、３９……速度制御部材、４０……エンジン速
度制御機構、４５……演算機構の中間レバ。
FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a schematic diagram of a hydraulic circuit to which the device of the present invention is related, FIG. 3 is a diagram showing a modification of the calculation mechanism, and FIG. 4 is a modification of the conversion mechanism. FIG. 5 is a diagram showing a modification of the sequential actuation mechanism. 1... High-speed diesel engine, 2, 3... Fixed displacement hydraulic pump, 5, 8... Directional control valve for travel motor, 11, 12... Travel motor, 15, 18
... Travel operation lever, 19, 20 ... Sequential operation mechanism, 21 ... Conversion mechanism, 35 ... Speed limit operation lever, 39 ... Speed control member, 40 ... Engine speed control mechanism, 45 ... Calculation mechanism intermediate lever.
Claims (1)
走行位置に先作動させる順次作動機構を介して、
該走行モータ用方向制御弁と、該走行操作レバの
前、後運動を一方向運動に変換する変換機構とを
連結し、該変換機構の出力端及び任意位置に固定
可能な速度制限操作機構の出力端と、エンジン速
度制御機構の入力端との間を１個の中間レバで連
結して、速度制限操作機構のみを高速側に最大変
位させた時は、エンジン速度制御機構の速度制御
部材が一定の中間速度位置に変位し、又該速度制
限操作機構と走行操作レバとを共に高速側に最大
変位させた時は、エンジン速度制御機構の速度制
御部材が最高速位置に変位するように構成したこ
とを特徴とする油圧駆動型自走作業機の速度制御
装置。1. The travel operation lever is provided with a sequential operation mechanism that activates the travel motor directional control valve to the travel position first.
A speed limiting operation mechanism that connects the travel motor directional control valve and a conversion mechanism that converts forward and backward motion of the travel operation lever into unidirectional movement, and that can be fixed at the output end of the conversion mechanism and at any position. When the output end and the input end of the engine speed control mechanism are connected by one intermediate lever and only the speed limit operation mechanism is maximally displaced to the high speed side, the speed control member of the engine speed control mechanism The speed control member of the engine speed control mechanism is configured to be displaced to the highest speed position when the engine speed is displaced to a certain intermediate speed position and both the speed limit operation mechanism and the traveling operation lever are maximally displaced to the high speed side. A speed control device for a hydraulically driven self-propelled working machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6006378A JPS54151781A (en) | 1978-05-22 | 1978-05-22 | Speed controller for hydraulic selfftravelling working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6006378A JPS54151781A (en) | 1978-05-22 | 1978-05-22 | Speed controller for hydraulic selfftravelling working machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54151781A JPS54151781A (en) | 1979-11-29 |
| JPS6157457B2 true JPS6157457B2 (en) | 1986-12-06 |
Family
ID=13131244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6006378A Granted JPS54151781A (en) | 1978-05-22 | 1978-05-22 | Speed controller for hydraulic selfftravelling working machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54151781A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE422297B (en) * | 1980-05-14 | 1982-03-01 | Jerzy Janczak | DEVICE AND MISSING DEVICE |
| JPS58176883U (en) * | 1982-05-18 | 1983-11-26 | 株式会社ナブコ | Accelerator control device that can be connected to the directional control valve |
| JPS60131645U (en) * | 1984-02-10 | 1985-09-03 | 日立建機株式会社 | Engine speed control device |
| JPH0346194Y2 (en) * | 1985-07-02 | 1991-09-30 | ||
| JPH0415961Y2 (en) * | 1986-04-04 | 1992-04-09 | ||
| JPH0415962Y2 (en) * | 1986-09-29 | 1992-04-09 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253189A (en) * | 1975-10-27 | 1977-04-28 | Hitachi Constr Mach Co Ltd | Controller, in hydraulic unit |
-
1978
- 1978-05-22 JP JP6006378A patent/JPS54151781A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253189A (en) * | 1975-10-27 | 1977-04-28 | Hitachi Constr Mach Co Ltd | Controller, in hydraulic unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54151781A (en) | 1979-11-29 |
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