JPH0367752U - - Google Patents
Info
- Publication number
- JPH0367752U JPH0367752U JP12456689U JP12456689U JPH0367752U JP H0367752 U JPH0367752 U JP H0367752U JP 12456689 U JP12456689 U JP 12456689U JP 12456689 U JP12456689 U JP 12456689U JP H0367752 U JPH0367752 U JP H0367752U
- Authority
- JP
- Japan
- Prior art keywords
- parking brake
- brake
- hydraulic circuit
- valve
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 1
Landscapes
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Control Of Fluid Gearings (AREA)
Description
第１図はこの考案の一実施例を示す油圧回路図
、第２図は従来のクローラキヤリヤの油圧回路図
である。
１……可変容量形油圧ポンプ、２……走行油圧
モータ、３……シリンダ、４……ブレーキシリン
ダ、５……制御弁、６……チヤージポンプ、８…
…作動油タンク、９……シヤトル弁、１０……チ
エツク弁内蔵型の電磁弁、１１……パイロツト式
切替弁、１２……操作スイツチ、１３……リレー
、１４……表示灯。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of this invention, and FIG. 2 is a hydraulic circuit diagram of a conventional crawler carrier. DESCRIPTION OF SYMBOLS 1... Variable displacement hydraulic pump, 2... Travel hydraulic motor, 3... Cylinder, 4... Brake cylinder, 5... Control valve, 6... Charge pump, 8...
... Hydraulic oil tank, 9 ... Shuttle valve, 10 ... Solenoid valve with built-in check valve, 11 ... Pilot type switching valve, 12 ... Operation switch, 13 ... Relay, 14 ... Indicator light.
Claims (1)
キシリンダに供給すれば制動が解かれ、圧油を排
出すればばね力により制動が掛かるネガテイブ式
のパーキングブレーキを設置した走行車両におい
て、前記走行油圧モータと閉油圧回路を構成する
可変容量型油圧ポンプの斜板を傾転させるシリン
ダと、斜板の傾転を制御する制御弁とを結ぶ油圧
回路に、シヤトル弁とそれにつらなるチエツク弁
内蔵型の電磁弁とを介在させた圧油取出し回路を
接続し、前記電磁弁をパーキングブレーキのパイ
ロツト式切替弁のスプールに接続し、パーキング
ブレーキ解除用の操作スイツチに前記電磁弁の励
磁コイルを電気的に接続し、操作スイツチを閉路
することにより、電磁弁およびパイロツト式切替
弁を通してブレーキシリンダに圧油を供給されて
パーキングブレーキの制動が解除されるように構
成したことを特徴とする走行パーキングブレーキ
の油圧回路。 (2) 操作スイツチの開路に連動して点灯する表
示灯を設けた請求項(1)記載の走行パーキングブ
レーキの油圧回路。[Scope of Claim for Utility Model Registration] (1) A negative parking brake that releases the brake when pressure oil is supplied to the brake cylinder on the output shaft of the travel hydraulic motor, and applies the brake by spring force when the pressure oil is discharged. In a traveling vehicle installed with a hydraulic circuit, the hydraulic circuit connects the traveling hydraulic motor and a cylinder that tilts a swash plate of a variable displacement hydraulic pump constituting a closed hydraulic circuit, and a control valve that controls tilting of the swash plate. Connect a pressure oil extraction circuit that includes a shuttle valve and a solenoid valve with a built-in check valve connected to it, connect the solenoid valve to the spool of the parking brake pilot type switching valve, and connect it to the operating switch for releasing the parking brake. By electrically connecting the excitation coil of the solenoid valve and closing the operating switch, pressure oil is supplied to the brake cylinder through the solenoid valve and the pilot type switching valve, and the parking brake is released. A hydraulic circuit for a traveling parking brake characterized by: (2) The hydraulic circuit for a travel parking brake according to claim (1), further comprising an indicator light that lights up in conjunction with opening of the operating switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12456689U JPH0367752U (en) | 1989-10-26 | 1989-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12456689U JPH0367752U (en) | 1989-10-26 | 1989-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0367752U true JPH0367752U (en) | 1991-07-02 |
Family
ID=31672477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12456689U Pending JPH0367752U (en) | 1989-10-26 | 1989-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0367752U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5092059B1 (en) * | 2012-03-29 | 2012-12-05 | 株式会社小松製作所 | Work vehicle and control method of work vehicle |
| US8701818B2 (en) | 2012-03-29 | 2014-04-22 | Komatsu Ltd. | Work vehicle and control method for work vehicle |
| WO2017078068A1 (en) * | 2015-11-02 | 2017-05-11 | ナブテスコオートモーティブ 株式会社 | Air supply system and method for controlling air supply system |
| JP2019051787A (en) * | 2017-09-14 | 2019-04-04 | 日立建機株式会社 | Negative brake release device for construction machinery |
-
1989
- 1989-10-26 JP JP12456689U patent/JPH0367752U/ja active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5092059B1 (en) * | 2012-03-29 | 2012-12-05 | 株式会社小松製作所 | Work vehicle and control method of work vehicle |
| WO2013145337A1 (en) * | 2012-03-29 | 2013-10-03 | 株式会社小松製作所 | Work vehicle and method for controlling work vehicle |
| US8701818B2 (en) | 2012-03-29 | 2014-04-22 | Komatsu Ltd. | Work vehicle and control method for work vehicle |
| WO2017078068A1 (en) * | 2015-11-02 | 2017-05-11 | ナブテスコオートモーティブ 株式会社 | Air supply system and method for controlling air supply system |
| JP2019051787A (en) * | 2017-09-14 | 2019-04-04 | 日立建機株式会社 | Negative brake release device for construction machinery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4580847A (en) | Auxiliary-energy-operable hydraulic brake system for automobile vehicles | |
| US4346944A (en) | Hydraulic main brake cylinder | |
| JPS60157946U (en) | Engine control device for hydraulically driven vehicles | |
| JPH0367752U (en) | ||
| US4280737A (en) | Pressure controlled electro-hydraulic brake system | |
| JPH0319503Y2 (en) | ||
| JPS6024915Y2 (en) | Fuel control mechanism for special purpose vehicles | |
| JPH0343166U (en) | ||
| JPS6230831Y2 (en) | ||
| JPH07106690B2 (en) | Travel speed switching device for hydraulic traveling vehicle | |
| JPH023938Y2 (en) | ||
| JPH0293365U (en) | ||
| JPH0552391U (en) | Hydraulic suspension system | |
| JPS635056U (en) | ||
| JPS6448357U (en) | ||
| JPH0525926Y2 (en) | ||
| JPH0539942Y2 (en) | ||
| JPS6128523Y2 (en) | ||
| JPH057475Y2 (en) | ||
| JPS6228669Y2 (en) | ||
| JPH0369360U (en) | ||
| JPS6134907Y2 (en) | ||
| JPH0561250U (en) | Quick idle control device for hydraulic excavator | |
| JPH0523364Y2 (en) | ||
| JPS58147879U (en) | Cab tail mechanism drive device |