JPS58128558A - Control oil pressure circuit for hydraulic motor with negative brake - Google Patents
Control oil pressure circuit for hydraulic motor with negative brakeInfo
- Publication number
- JPS58128558A JPS58128558A JP1241382A JP1241382A JPS58128558A JP S58128558 A JPS58128558 A JP S58128558A JP 1241382 A JP1241382 A JP 1241382A JP 1241382 A JP1241382 A JP 1241382A JP S58128558 A JPS58128558 A JP S58128558A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- brake
- unloading
- oil
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/122—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger for locking of reverse movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/22—Brakes applied by springs or weights and released hydraulically
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、可変容量膨油圧ポンプとネガティブブレーキ
をそなえた油圧モータとを閉回路によりたがいに連結し
、閉回路間にアンロード用開閉弁を設け、ネガティブブ
レーキの導油室トアンロ−ド用關閉弁のパイロット油室
とを、引張り力が作用していないと傘には圧油をネガテ
ィブブレーキに送る位置にスプールを切替える荷重を持
つばねをそなえたブレーキ用切替弁に接続した油圧モー
タの制御回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention connects a variable capacity expansion hydraulic pump and a hydraulic motor equipped with a negative brake to each other through a closed circuit, and provides an unloading on-off valve between the closed circuits to connect a hydraulic motor equipped with a negative brake. The pilot oil chamber of the oil chamber to unload valve is replaced with a brake switching valve equipped with a spring with a load that switches the spool to the position where pressure oil is sent to the negative brake when no tensile force is applied. This relates to the control circuit for the connected hydraulic motor.
まず、油圧トランスミッション付車両におけるこの種の
油圧モータの制御油圧回路の一例を第１図により説明す
る。First, an example of a control hydraulic circuit for a hydraulic motor of this type in a vehicle with a hydraulic transmission will be explained with reference to FIG.
制御レバーをそれぞれ操作しｔ４−３．３′に連結した
左右の可変容量形油圧ポンプ（以下油圧ポンプという）
１，１’と左右の油圧モータ２．２′とは、閉回路４Ａ
・４Ｂ、４’Ａ・４′Ｂによりたがいにつらねられてお
り、油圧モータ２．２゛の出力軸にはシリンダの導油室
６．６′に圧油を供給すると制動が解かれ、その圧油を
排出させるとシリンダ内におさめたブレーキはね５ａ、
５１ａにより制動がかかるネガティブブレーキ５．５′
が設置されている。油圧ポンプ１．１′と連動的に駆動
される補給油圧ポンプ７．７′の吐出かわば、それぞれ
逆止め弁８Ａ％６Ｂ１逆止め弁８’Ａ、Ｍ’Ｂｆ介して
閉回路４Ａ、４Ｂ、閉回路４’Ａ、 ４’Ｂにつらねら
れている。Left and right variable displacement hydraulic pumps (hereinafter referred to as hydraulic pumps) connected to t4-3.3' by operating control levers respectively
1, 1' and left and right hydraulic motors 2, 2' are closed circuit 4A.
・4B, 4'A, 4'B are connected to each other, and when pressure oil is supplied to the oil guide chamber 6.6' of the cylinder, the output shaft of the hydraulic motor 2.2' is released, and its When the pressure oil is discharged, the brake splash 5a contained in the cylinder,
Negative brake 5.5' where braking is applied by 51a
is installed. The discharge of the replenishment hydraulic pump 7.7' which is driven in conjunction with the hydraulic pump 1.1' is connected to the closed circuits 4A, 4B, 4A and 4B via the check valves 8A% and 6B1 and the check valves 8'A and M'Bf, respectively. It is connected to closed circuits 4'A and 4'B.
閉回路４Ａ１４Ｈには、閉鎖位置から開放位置に切替え
るパイロット油室９ａと開放位置から閉鎖位置に切替え
るパイロット油室９’ｂとをそなえたアンロード用開閉
弁９が接続されており、閉回路４’Ａ、 ４’Ｈにも、
アンロード用開閉弁９と同様なパイロット油室９’ａ、
９°ｂｔそなえたアンｏ −ド用開閉弁９′が接続され
ている。ネガティブブレーキ５、ダの導油室６．６９は
、配管１０を介してブレーキ用切替弁１１の作動ポート
に接続されており、アンロード用切替弁９．９′の一方
のパイロット油室９ａ、９’ａは配管１ｚを介して切替
弁１１の作動ポートに接続されており、アンロード用切
替弁９．９′の他方のパイロット油室９ｂ％９°ｂは配
管１３２よび配管１０の一部を介して切替弁１１の作動
ポートに接続されている。切替弁１１は、引張り力が作
用していないときには圧油をネガティブブレーキ５．５
９の導油室６．６′に送る位置にスプールを保持する荷
重を待つばね１４をそなえており、スプールはケーブル
１５を介して長穴付きロッド１６に連結されている。長
穴付傘ロフト１６の長穴１６ｍには、ペダル１７の中間
部に設けたビン１８がはめこまれており、ペダル１７の
下端部は軸１９に連結されている。補給油圧ポンプ７．
７゛のどちらか一方、たとえば７°の吐出がわけ、切替
弁１１の導油がわポートにつらねられている。操作レバ
ー３．３の下端部を連結した軸２０．２０′と軸１９と
は、図示してないリンク機構により連結されている。な
お、２１は油タンクで、これに図示のとおり各戻り管路
が接続されている。An unloading on-off valve 9 having a pilot oil chamber 9a for switching from a closed position to an open position and a pilot oil chamber 9'b for switching from an open position to a closed position is connected to the closed circuit 4A14H. 'A, 4'H also,
A pilot oil chamber 9'a similar to the unloading on-off valve 9,
An open/close valve 9' for an open/close valve having a 9°bt is connected. The negative brake 5, the oil guide chamber 6.69 is connected to the operating port of the brake switching valve 11 via the piping 10, and the one pilot oil chamber 9a of the unloading switching valve 9.9', 9'a is connected to the operation port of the switching valve 11 via the pipe 1z, and the other pilot oil chamber 9b%9°b of the unloading switching valve 9.9' is connected to a part of the pipe 132 and the pipe 10. It is connected to the operating port of the switching valve 11 via. The switching valve 11 switches the pressure oil to the negative brake 5.5 when no tensile force is applied.
The spool is connected to a rod 16 with an elongated hole via a cable 15. A bin 18 provided in the middle of a pedal 17 is fitted into the long hole 16m of the umbrella loft 16 with a long hole, and the lower end of the pedal 17 is connected to a shaft 19. Replenishment hydraulic pump7.
7°, for example, 7°, is separated and connected to the oil guide port of the switching valve 11. The shaft 20.20', which connects the lower end of the operating lever 3.3, and the shaft 19 are connected by a link mechanism (not shown). Note that 21 is an oil tank to which each return pipe is connected as shown.
ペダル１７を踏みこむと、図示してないりンク機構を介
して油圧ポンプ１．１″制御用の操作レバー！、３’が
戻り、油圧そ一部２．２ゝの回転を停止ν ３
させようとするとともに、操作レバー３．３が１戻った
時点でブレーキ用切替弁１１を切替えて、ネガティブブ
レーキ５．５１の制動を行わせ、アンロード開閉弁９、
ｓ’ｔｓ放させる。すなわち、油室６．６°の圧油が配
管ｌＯ１切贅弁１１を通して油タンク２１に排出させら
れ、補給油圧ポンプ７１の吐出油が、切替弁１１、配管
１２を通して開閉弁９．９９のパイロット油室９ａ％９
’ａに供給される。車体の停止時にペダル１７を階みこ
むことにより、油圧ポンプ１．１″の斜板を中立にして
吐出量を零にするとともに、ネガティブブレーキ５．５
′の制動を行わせる際に、図示してないリンク機構のガ
タ等により、油圧ポンプ１．１９の斜板が確 □実に
中立にならないで、油圧ポンプ１．１′がわずかに吐出
をしていると、ネガティブブレーキ５．５′が引きずり
現象を起こす。これの対策として、ネガティブブレーキ
５．５”に供給する圧油を介してアンロード用−閉弁９
．９′を開放して、ネガティブブレーキ５．５“が確実
に制動を行った時点で油圧ポンプ１．１′の吐出油をア
ンロードさせ、油圧モータ２．２′へ圧油を送らなくす
る。When the pedal 17 is depressed, the operating levers !, 3' for controlling the hydraulic pump 1.1'' return via a link mechanism (not shown), and the rotation of the hydraulic part 2.2'' is stopped. At the same time, when the operating lever 3.3 returns to 1, the brake switching valve 11 is switched to apply negative brake 5.51, and the unload on/off valve 9,
Let s'ts go. That is, the pressure oil in the oil chamber 6.6° is discharged into the oil tank 21 through the piping lO1 cutout valve 11, and the oil discharged from the replenishment hydraulic pump 71 passes through the switching valve 11 and piping 12 to the pilot of the on-off valve 9.99. Oil room 9a%9
'a is supplied. By depressing the pedal 17 when the vehicle is stopped, the swash plate of the hydraulic pump 1.1'' is set to neutral, reducing the discharge amount to zero, and the negative brake 5.5 is activated.
When braking ', the swash plate of hydraulic pump 1.19 does not become neutral due to play in the link mechanism (not shown), etc. □Hydraulic pump 1.1' slightly discharges without becoming neutral. If it is, the negative brake 5.5' will cause a dragging phenomenon. As a countermeasure for this, the unloading - closing valve 9 is supplied via pressure oil to the negative brake 5.5".
．． 9' is opened, and when the negative brake 5.5'' performs braking reliably, the oil discharged from the hydraulic pump 1.1' is unloaded, and pressure oil is no longer sent to the hydraulic motor 2.2'.
しかし、ネガティブブレーキ５．５”とアン０−ド開閉
弁９．９゛の作動を比較すると、ブレーキ用切替弁１１
が１位区から６位区に切替ってからＴンロード開閉弁９
．９９が閉位置から開位置になるまでに約０．２秒、ネ
ガティブブレーキ５．５′の制動が確実に行われるまで
に約０．６秒（ネガティブブレーキのピストンの摺動抵
抗が大きいため）かかり、時間遅れがある口したがって
、坂道でこの現象が生じると、アンロード用開閉弁９．
９′が開いてからネガティブブレーキ５、ダの制動が働
くまでの間、油圧モータ２．２′は自由となり、車体が
下降し、危険を招く◎
本発明は上述の欠点を容易に除くことかで貴る油圧モー
タの制御油圧回路を提供することを目的とするものであ
る。However, when comparing the operation of the negative brake 5.5" and the un0-door on/off valve 9.9", it is found that the brake switching valve 11
After switching from 1st place to 6th place, T-ton road on/off valve 9
．． It takes about 0.2 seconds for 99 to go from the closed position to the open position, and about 0.6 seconds for the negative brake 5.5' to be properly applied (because the sliding resistance of the negative brake piston is large). Therefore, if this phenomenon occurs on a slope, the unloading on/off valve 9.
The hydraulic motor 2.2' is free from the time when the negative brake 9' is opened until the negative brake 5 and the brake are applied, causing the vehicle body to descend and causing danger. The present invention can easily eliminate the above-mentioned drawbacks. The purpose of this invention is to provide a control hydraulic circuit for a valuable hydraulic motor.
つぎに、第一の発明の実施態様を第２図により説明する
。同図において、第１図と同じ符号をつけたものは、同
じものを表わす。Next, an embodiment of the first invention will be explained with reference to FIG. In this figure, the same reference numerals as in FIG. 1 represent the same things.
アンロード用開閉弁９．９′のスプールの片カワには、
それぞれ信号油圧がないと赤に常に閉弁状態にするばね
２２．２２′が設けられている◎ブレーキ用切替弁１１
の作動ポートとアンロード用開閉弁９、ＣＩノ１＜４０
７ ）ｍｉｉＱ ８％ ９’ａ、 ９ ｂ。On one side of the spool of the unloading on-off valve 9.9',
Each valve is equipped with a spring 22, 22' that always closes the valve in red when there is no signal oil pressure.◎Brake switching valve 11
operating port and unloading on/off valve 9, CI no. 1<40
7) miiQ 8% 9'a, 9 b.
９°ｂとをつらねた管路１２．１３には、それぞれオリ
フィス２３Ａ、２３Ｂが設けられている。Orifices 23A and 23B are provided in the conduits 12.13 that connect the 9°b and 9°b, respectively.
その他の構成は第１図のものと同じである。The other configurations are the same as those in FIG.
ブレーキ用切替弁１１が切替えられ、ネガティブブレー
キ５．５９の制動が行われるときには、油室６．６′の
圧油が配管１０および切替弁１１を通して油タンク２１
に排出させられ、ネガティブブレーキ５．５′のピスト
ンがブレーキばね５ａｑ５’暑により押される。When the brake switching valve 11 is switched and the negative brake 5.59 is applied, the pressure oil in the oil chamber 6.6' flows through the pipe 10 and the switching valve 11 to the oil tank 21.
The piston of the negative brake 5.5' is pushed by the brake spring 5aq5'.
このとき、補給油圧ポンプデの圧油がブレーキ用切替弁
１１、オリフィス２３Ａ、配管１２を過ってアンロード
用開閉弁９．９１のパイロット油室９ｍ、９°１に供給
され、開閉弁９．９′が開放されてアンロードが行われ
る。その圧油はオリフィス２３ムに絞られ、かつ、ばね
２２．２２’に抗して開閉弁９．９′を開く。また、開
閉弁９．９′が開くと傘、他方のパイロット油室９ｂ、
９’ｂから油タンク２１へ排出させられる圧油もオリフ
ィス２３Ｂにより絞られる０仁のため、アンロード用開
閉弁９．９′は、ブレーキ用切替弁１１が切替った後、
時間遅れを経てから關くことになる・したがって、切替
弁１１が切替えられた後ネガティブブレーキ５．５°の
制動がかかるまでの時間遅れ０．６秒に合うように、オ
リフィス２３Ａとばね２２．２２°を設定すれば、ブレ
ーキ５．５′の制動とアンロード用開閉弁９．９′の切
替え動作が同時に行われる。At this time, the pressure oil from the replenishment hydraulic pump D passes through the brake switching valve 11, the orifice 23A, and the piping 12, and is supplied to the pilot oil chamber 9m, 9°1 of the unloading on-off valve 9.91. 9' is opened and unloading is performed. The pressure oil is throttled into the orifice 23 and opens the on-off valve 9.9' against the force of the spring 22.22'. Also, when the on-off valve 9.9' opens, the umbrella, the other pilot oil chamber 9b,
Since the pressure oil discharged from 9'b to the oil tank 21 is also throttled by the orifice 23B, the unloading on-off valve 9.9' is closed after the brake switching valve 11 is switched.
Therefore, after the switching valve 11 is switched, the orifice 23A and the spring 22. If 22 degrees is set, the braking of the brake 5.5' and the switching operation of the unloading on-off valve 9.9' are performed simultaneously.
ネガティブブレーキ５．５°の制動を解除すると傘には
、圧油がブレーキ用切替弁１１、配管１０を通して油室
６．６°に供給されるとともに、オリフィス２３Ｂによ
り絞られて配管１３を経てアンロード用開閉弁９．９９
のパイロット油ｉ［９ｂ、９’ｂに供給される。また、
反対がわのパイロット油室９ｍ、９°ａからの圧油は、
オリフィス２３ムにより絞られた後切替弁１１を通して
油タンク２１に排出させられる。これにより、アンロー
ド用開閉弁９．９′は開くときと同様に閉じると１に＃
ｃも時間遅れを生じるが、閉じる場合は、ばね２２，２
２１が閉じ動作を助けるよ’ｒＥ働くので、開閉弁９．
９゛の閉鎖のときの時間遅れは開放のと傘のそれにくら
べて小さいＧ
このように、オリフィス２３Ａ、２３Ｂおよびばね２２
．２２’により、ネガティブブレーキ５．５”の作動と
アンロード用開閉弁の開閉作動とをほぼ同時にすること
ができる口
謳３図は第二の発明の実施Ｓ様を示し、同図において、
第２図と同じ符号をつけたものは同じものを表わす。When the negative brake of 5.5° is released, pressure oil is supplied to the oil chamber 6.6° through the brake switching valve 11 and piping 10, and is throttled by the orifice 23B and sent through piping 13 to the umbrella. Load on/off valve 9.99
pilot oil i[9b, 9'b. Also,
The pressure oil from the pilot oil chamber 9m, 9°a on the opposite side is
After being throttled by the orifice 23, it is discharged into the oil tank 21 through the switching valve 11. As a result, the unloading on-off valve 9.9' changes to #1 when it is closed in the same way as when it is opened.
c also causes a time delay, but when closing, the springs 22, 2
21 helps the closing operation, so open/close valve 9.
The time delay when closing 9゛ is smaller than that when opening G. Thus, the orifices 23A, 23B and the spring 22
．． 22', the operation of the negative brake 5.5" and the opening and closing operation of the unloading on-off valve can be performed almost simultaneously. Figure 3 shows an embodiment S of the second invention, and in the same figure,
Items with the same reference numerals as in Figure 2 represent the same items.
ブレーキ用切替弁１１の作動ポートにつらねた配管１２
には、切替弁１１がわへの流れを許容する逆止め弁２４
Ａとオリフィス２５Ａとがたがいに並列に設けられてお
り、ブレーキ用切替弁１１の作動ポートにつらねた配管
１３には、切替弁１１がわへの流れを許容する逆止め弁
２４Ｂとオリフィス２５Ｂとがたがいに並列に設けられ
ている。アンロード用切替弁９はばね２２ｔ−そなえて
いないＯ
なお、図示を省略したその他の構成は第２図のものと同
様である。Piping 12 connected to the operating port of the brake switching valve 11
, a check valve 24 that allows flow to the side of the switching valve 11 is provided.
A and an orifice 25A are provided in parallel with each other, and the piping 13 connected to the operating port of the brake switching valve 11 has a check valve 24B and an orifice 25B that allow flow to the switching valve 11. They are arranged in parallel. The unloading switching valve 9 is not provided with a spring 22t.Other configurations not shown are the same as those in FIG. 2.
ネガティブブレーキ５．５′の制動が行われるときには
、圧油はブレーキ用切替弁１１からオリフイス２５Ａｌ
経たのち、アンロード用開閉弁９．９１のパイａット油
室９１，９’Ｊｌに供給され、反対がわのパイロット油
室９ｂ、９’ｂの圧油は逆止め弁２４Ｂ１切替弁１１を
経て油タンク２１に排出させられ、開閉弁９．９′が開
放される。したがって、開閉弁９．９′が開くときの時
間遅れはオリフィス２５ムによって決まる。When the negative brake 5.5' is applied, pressure oil flows from the brake switching valve 11 to the orifice 25Al.
After that, the pressure oil is supplied to the pilot oil chambers 91, 9'Jl of the unloading on-off valve 9.91, and the pressure oil in the pilot oil chambers 9b, 9'b on the opposite side is supplied to the check valve 24B1 switching valve 11. The oil is discharged into the oil tank 21 through the steps, and the on-off valves 9 and 9' are opened. The time delay when the on-off valve 9.9' opens is therefore determined by the orifice 25m.
ネガティブブレーキ５．５′の制動が解除されると倉に
は、圧油はブレーキ用切替弁１１からオリフィス２５Ｂ
を経たのち、パイロット油室９ｂ。When the negative brake 5.5' is released, pressure oil flows from the brake switching valve 11 to the orifice 25B.
After that, go to pilot oil chamber 9b.
９’ｂに供給され、反対がわのパイロット油室９ａ、ｒ
ａの圧油は、逆止め弁２４人、切替弁１１を経て油タン
ク２１に排出させられ、開閉弁９．９′が閉じられる口
したがって、開閉弁が閉じるときの待時遅れはオリフィ
ス２５Ｂによって決まる口このように、オリフィス２５
Ａ、ｚ５Ｂにより、ネガティブブレーキ５．５′の作動
とアンロード用開閉弁９．９′の開閉動作とがほぼ同時
に行われる０
以上説明した本発明によれば、油圧トランスミッション
付車両を坂道で停止させる時、ネガティブブレーキの制
動が行われると同時に閉回路のアンロード用開閉弁が開
くので、車体が降下することがなく、安全である。また
、発進時には、アンロード用開閉弁が閉じると同時にネ
ガティブブレーキの制動が解かれるので、同様に車体が
降下することがない―9'b, and the pilot oil chambers 9a, r on the opposite side.
The pressure oil in a is discharged into the oil tank 21 through the check valve 24 and the switching valve 11, and the on-off valve 9.9' is closed. Therefore, the waiting delay when the on-off valve closes is caused by the orifice 25B. The mouth is determined like this, orifice 25
With A and z5B, the operation of the negative brake 5.5' and the opening/closing operation of the unloading on-off valve 9.9' are performed almost simultaneously.0 According to the present invention described above, a vehicle with a hydraulic transmission can be stopped on a slope. When doing so, the closed circuit unloading on-off valve opens at the same time as the negative brake is applied, so the vehicle body does not descend and is safe. In addition, when starting, the negative brake is released at the same time as the unloading on-off valve closes, so the vehicle does not descend as well.
第１図はネガティブブレーキをそなえた油圧モータの制
御油圧回路を示す系統図、第２図、％３図は本発明の油
圧モータの制御油圧回路を示す系統図である。
１．１９・−可変容量形油圧ポンプ、
２．２１・・油圧モータ、３．３’・・操作レバー、
４Ａ、４Ｂ、４°Ａ、４°Ｂ・・閉回路、５．５９・
・ネガティブブレーキ、
５ａ、５’ａ・・ブレーキばね、 ６．６°・・導油
室、７．７’・噌補給油圧ポンプ、
８人、８Ｂ％８″Ａ、８’Ｂ・・逆止め弁、９．９＃＠
・アンロード用開閉弁、
９ａ、９ｂ、９’ｍ、９’ｂ−−パイｏッ）油室、１１
・・ブレーキ用切替弁、 １４・・ばね、１５・・ゲ
ーブル、 １６ｅ・長穴付きａラド１フ・・ペダル、
１８・ｅピン、２１・・油タンク、 ２２．２
２′・・ばね、２３Ａ、２３Ｂ・・オリフィス、
２４Ａ、２４Ｂ・・逆止め弁、
２５Ａ、２５Ｂ・・オリフィスFIG. 1 is a system diagram showing a control hydraulic circuit for a hydraulic motor equipped with a negative brake, and FIGS. 2 and 3 are system diagrams showing a control hydraulic circuit for a hydraulic motor according to the present invention. 1.19.--variable displacement hydraulic pump, 2.21..hydraulic motor, 3.3'..operation lever,
4A, 4B, 4°A, 4°B...Closed circuit, 5.59.
- Negative brake, 5a, 5'a... Brake spring, 6.6°... Oil guide chamber, 7.7' - Replenishment hydraulic pump, 8 people, 8B% 8''A, 8'B... Reverse check Valve, 9.9#@
・Unloading on/off valve, 9a, 9b, 9'm, 9'b--Paio) Oil chamber, 11
・・Brake switching valve, 14・・Spring, 15・・Gable, 16e・Arad 1F・・Pedal,
18・e pin, 21・oil tank, 22.2
2'... Spring, 23A, 23B... Orifice, 24A, 24B... Check valve, 25A, 25B... Orifice
Claims (2)
なえた油圧モータとを閉回路により゛たがいに連結し、
閉回路間にアンロード用開閉弁を設け、ネガティブブレ
ーキの導油室とアンロード用−１閉弁のパイロット油室
とを、引張り力が作用していないときには圧油をネガテ
ィブブレーキに送る位置にスプールを保持する荷重を持
つばねをそなえたブレーキ用切替弁に接続した油圧モー
タの制御油圧回路において、アンロード用開閉弁のスプ
ールの片がわに、信号油圧がないと傘には常に閉弁状態
になるようにばねを設けるとともに、アンロード用開閉
弁のパイロット油室とブレーキ用切替弁とをつらねた管
路にそれぞれオリフィスを設けたことを特徴とする油圧
モータの制御油圧回路。(1) A variable displacement expansion hydraulic pump and a hydraulic motor equipped with a negative brake are connected to each other through a closed circuit,
An on-off valve for unloading is provided between the closed circuits, and the oil guide chamber of the negative brake and the pilot oil chamber of the -1 closed valve for unloading are placed in a position where pressure oil is sent to the negative brake when no tensile force is applied. In the control hydraulic circuit of the hydraulic motor connected to the brake switching valve, which has a spring with a load to hold the spool, one side of the spool of the unloading on-off valve is always closed to the umbrella when there is no signal hydraulic pressure. 1. A control hydraulic circuit for a hydraulic motor, characterized in that a spring is provided to maintain the condition, and an orifice is provided in each of the pipes connecting a pilot oil chamber of an unloading on-off valve and a brake switching valve.
なえた油圧モータとを閉回路によりたがいに連結し、閉
回路間にアンロード用開閉弁を設け、ネガティブブレー
キの導油室とアンロード用開閉弁のパイロット油室とを
、引張り力が作用していないときには圧油をネガティブ
ブレーキに送る位置にスプールを保持する荷重を持つば
ねをそなえたブレーキ用切替弁に接続した油圧モータの
制御油圧回路において、ブレーキ用切替弁とアンロード
用開閉弁のパイロット室との間に、アンロード用開閉弁
の閉じがわパイロット油室からブレーキ用切替弁、およ
びアンロード用開閉弁の！＠きがわパイロット油室から
ブレーキ用切替弁への油の流れを許容する逆止め弁を設
けるとともに、それぞれの逆止め弁に並列にオリフィス
を接続したことを特徴とする油圧モータの制御油圧回路
。(2) A variable capacity expansion hydraulic pump and a hydraulic motor equipped with a negative brake are connected to each other through a closed circuit, and an unloading on-off valve is provided between the closed circuits, and an oil guide chamber for the negative brake and an unloading on-off valve are provided between the closed circuits. In a control hydraulic circuit for a hydraulic motor, the pilot oil chamber of the hydraulic motor is connected to a brake switching valve equipped with a spring having a load that holds the spool in a position to send pressure oil to the negative brake when no tensile force is applied. Between the brake switching valve and the pilot chamber of the unloading on-off valve, there is a connection between the pilot oil chamber of the unloading on-off valve and the brake switching valve and the unloading on-off valve! @Kigawa A hydraulic motor control hydraulic circuit characterized by a check valve that allows oil to flow from the pilot oil chamber to the brake switching valve, and an orifice connected in parallel to each check valve. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1241382A JPS58128558A (en) | 1982-01-27 | 1982-01-27 | Control oil pressure circuit for hydraulic motor with negative brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1241382A JPS58128558A (en) | 1982-01-27 | 1982-01-27 | Control oil pressure circuit for hydraulic motor with negative brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58128558A true JPS58128558A (en) | 1983-08-01 |
| JPS6139540B2 JPS6139540B2 (en) | 1986-09-04 |
Family
ID=11804572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1241382A Granted JPS58128558A (en) | 1982-01-27 | 1982-01-27 | Control oil pressure circuit for hydraulic motor with negative brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58128558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772702A1 (en) * | 1997-12-19 | 1999-06-25 | Caterpillar Inc | Controlled release of mechanical brake on vehicle driven by hydrostatic motors |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022754B (en) * | 2016-02-02 | 2020-06-02 | 东京毅力科创株式会社 | Substrate processing apparatus |
-
1982
- 1982-01-27 JP JP1241382A patent/JPS58128558A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772702A1 (en) * | 1997-12-19 | 1999-06-25 | Caterpillar Inc | Controlled release of mechanical brake on vehicle driven by hydrostatic motors |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6139540B2 (en) | 1986-09-04 |
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