JPS62151174U - - Google Patents
Info
- Publication number
- JPS62151174U JPS62151174U JP4019486U JP4019486U JPS62151174U JP S62151174 U JPS62151174 U JP S62151174U JP 4019486 U JP4019486 U JP 4019486U JP 4019486 U JP4019486 U JP 4019486U JP S62151174 U JPS62151174 U JP S62151174U
- Authority
- JP
- Japan
- Prior art keywords
- parking brake
- pressure
- switch
- selector switch
- relay
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Braking Systems And Boosters (AREA)
Description
第１図はこの考案によるホイール式油圧シヨベ
ルのパーキングブレーキ装置の電気・空圧回路図
、第２図は従来のホイール式油圧シヨベルのパー
キングブレーキ装置の電気・空圧回路図である。
FIG. 1 is an electric/pneumatic circuit diagram of a parking brake device for a wheeled hydraulic excavator according to this invention, and FIG. 2 is an electric/pneumatic circuit diagram of a conventional parking brake device for a wheeled hydraulic excavator.
Claims (1)
レーキの制御部に接続した圧気管路の途中に、パ
ーキングブレーキ切替スイツチを介して切替える
ソレノイド式パーキングブレーキバルブを設けた
ホイール式油圧シヨベルのパーキングブレーキ装
置において、パーキングブレーキ切替スイツチと
ソレノイド式パーキングブレーキバルブとの間に
リレーを設け、そのリレーとパーキングブレーキ
切替スイツチとの間に、圧気管路の圧力が所定圧
以上である時に閉路する圧力スイツチを設け、パ
ーキングブレーキ切替スイツチが駐車側位置に切
替えられており、かつ、圧力スイツチが閉路して
いる時のみ前記リレーが作動し、その作動状態に
おいてパーキングブレーキ切替スイツチを切替え
れば、ソレノイド式パーキングブレーキバルブが
切替えら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パーキング
ブレーキ装置。 The parking brake of a wheel-type hydraulic excavator is equipped with a solenoid-type parking brake valve that is switched via a parking brake changeover switch in the middle of a pressure air pipe line that connects one end to a pressure air source and the other end to the parking brake controller. In the device, a relay is provided between the parking brake selector switch and the solenoid type parking brake valve, and a pressure switch is provided between the relay and the parking brake selector switch that closes when the pressure in the pneumatic pipe is equal to or higher than a predetermined pressure. The relay operates only when the parking brake selector switch is switched to the parking side position and the pressure switch is closed, and if the parking brake selector switch is switched in this operating state, the solenoid type parking brake is activated. A parking brake device characterized in that the parking brake is released by switching a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4019486U JPS62151174U (en) | 1986-03-18 | 1986-03-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4019486U JPS62151174U (en) | 1986-03-18 | 1986-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62151174U true JPS62151174U (en) | 1987-09-25 |
Family
ID=30854062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4019486U Pending JPS62151174U (en) | 1986-03-18 | 1986-03-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62151174U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717865B2 (en) * | 1977-04-07 | 1982-04-13 | ||
| JPS6111462B2 (en) * | 1978-04-19 | 1986-04-03 | Hitachi Ltd |
-
1986
- 1986-03-18 JP JP4019486U patent/JPS62151174U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717865B2 (en) * | 1977-04-07 | 1982-04-13 | ||
| JPS6111462B2 (en) * | 1978-04-19 | 1986-04-03 | Hitachi Ltd |