JPH0441551U - - Google Patents
Info
- Publication number
- JPH0441551U JPH0441551U JP8311290U JP8311290U JPH0441551U JP H0441551 U JPH0441551 U JP H0441551U JP 8311290 U JP8311290 U JP 8311290U JP 8311290 U JP8311290 U JP 8311290U JP H0441551 U JPH0441551 U JP H0441551U
- Authority
- JP
- Japan
- Prior art keywords
- brake
- switch
- state
- communicating
- pressure oil
- 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
- 238000010276 construction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案に係る回路図。第２図は一部変
更した別の回路図。第３図は従来公知の回路図。
図において；１……パイロツト用油圧ポンプ、
２ａ，２ｂ……操作弁、３ａ……旋回用パイロツ
ト式方向切換弁、３ｂ〜３ｈ……フロントアタツ
チメント及び走行用パイロツト式方向切換弁、４
……信号用圧油供給管路、５……絞り、６……圧
力スイツチ、７……ブレーキ解除用シリンダ、８
……ブレーキシリンダ管路、９……旋回ブレーキ
電磁開閉弁、１０……パイロツト油圧ポンプ圧油
管路、１１……電気通路、１２……タイマー又は
マイコン、１３……スイツチ、１４……旋回用油
圧モータ、１５……主油圧ポンプ、１６……切換
弁操作圧管路、１７……操作弁用圧油供給管路、
１８……旋回用操作弁、１９……シヤトル弁、２
０……圧力スイツチ、２１……電磁開閉弁、２２
……ブレーキ解除用シリンダ、２３……マイコン
。
FIG. 1 is a circuit diagram according to the present invention. Figure 2 is another circuit diagram with some changes. FIG. 3 is a conventionally known circuit diagram. In the figure: 1... Pilot hydraulic pump,
2a, 2b...operation valve, 3a...pilot type directional control valve for turning, 3b to 3h...pilot type directional control valve for front attachment and travel, 4
... Signal pressure oil supply pipe, 5 ... Throttle, 6 ... Pressure switch, 7 ... Brake release cylinder, 8
... Brake cylinder pipe line, 9 ... Swing brake electromagnetic on-off valve, 10 ... Pilot hydraulic pump pressure oil pipe line, 11 ... Electrical passage, 12 ... Timer or microcomputer, 13 ... Switch, 14 ... Swing hydraulic pressure Motor, 15...Main hydraulic pump, 16...Switching valve operating pressure pipe line, 17...Pressure oil supply pipe line for operating valve,
18...Swivel operation valve, 19...Shuttle valve, 2
0...Pressure switch, 21...Solenoid on-off valve, 22
...Brake release cylinder, 23...Microcomputer.
Claims (1)
レーキ解除される旋回体駐車ブレーキにおいて、
パイロツト式方向切換弁３ａ〜３ｈを連通してい
る信号用圧油供給管路４から圧力スイツチ６によ
り信号を取り出し、旋回ブレーキ電磁開閉弁９を
作動させ、旋回ブレーキ解除用シリンダ７に圧油
を供給する状態と、タンクへ連通させブレーキを
作動させる状態とに自動的に切換え可能とし、か
つスイツチ操作により、常時ブレーキ状態に切換
可能としたことを特徴とする建設機械の旋回体駐
車ブレーキ用回路。 In a rotating body parking brake where the brake is activated by spring force and released by hydraulic pressure,
The pressure switch 6 takes out a signal from the signal pressure oil supply pipe 4 communicating with the pilot type directional control valves 3a to 3h, operates the swing brake electromagnetic on-off valve 9, and supplies pressure oil to the swing brake release cylinder 7. A parking brake circuit for a revolving body of construction machinery, characterized in that it can automatically switch between a supplying state and a state in which the brake is actuated by communicating with a tank, and can be constantly switched to a braking state by operating a switch. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8311290U JPH0441551U (en) | 1990-08-07 | 1990-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8311290U JPH0441551U (en) | 1990-08-07 | 1990-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0441551U true JPH0441551U (en) | 1992-04-08 |
Family
ID=31630508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8311290U Pending JPH0441551U (en) | 1990-08-07 | 1990-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441551U (en) |
-
1990
- 1990-08-07 JP JP8311290U patent/JPH0441551U/ja active Pending