JPH0266760U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a speed change actuating device according to an embodiment of the present invention, and FIG. 2 is a schematic explanatory diagram of a control device in FIG. 1. 2: Gear shift actuation device, 4: Selection actuation section, 6: Select cylinder device, 8: Shift cylinder device, 1
0: First select pressure passage, 12: Second select pressure passage, 14: First shift pressure passage, 16: Second shift pressure passage, 18: Air tank, 20: Air tank, 22: Control device, 50: First select Solenoid valve, 52: second select solenoid valve, 82: first shift solenoid valve, 84: second shift solenoid valve, 86: shift lever switch, 88: central control device, 90: control circuit, 94: rotary switch.

Claims (1)

[Scope of utility model registration request] A select cylinder device that has a select piston that limits a first select pressure chamber and a second select pressure chamber and performs a select operation of a transmission, and a shift piston that limits a first shift pressure chamber and a second shift pressure chamber that A shift cylinder device that performs a shift operation of the transmission, a hydraulic pressure supply source that supplies hydraulic pressure to each of the pressure chambers, and a first select pressure passage that communicates the hydraulic pressure supply source with the first select pressure chamber. a first select solenoid valve, a second select solenoid valve disposed in a second select pressure passage communicating the hydraulic pressure supply source and the second select pressure chamber, and the hydraulic pressure supply source and the first shift pressure chamber. a first shift solenoid valve disposed in a first shift pressure passage communicating with the hydraulic pressure supply source and the second shift pressure chamber; a second shift solenoid valve disposed in a second shift pressure passage communicating the hydraulic pressure supply source with the second shift pressure chamber; A manually operated switch provided in the current supply circuit of each of the solenoid valves and having a movable contact and a plurality of fixed contacts connected to each of the solenoid valves, and operation of each of the first and second shift solenoid valves and each of the same solenoid valves. A first fixed contact of the manually operated switch connected through each diode provided in a direction that only allows current, and each of the first and second shift solenoid valves as well as each of the first and second select solenoid valves. or the second one of the manually operated switches connected via each diode installed in a direction that allows only the operating current of each solenoid valve.
and a third fixed point of the manually operated switch connected to either one of the first and second shift solenoid valves through each diode provided in a direction that allows only the operating current of the solenoid valve. A transmission operating device characterized by having a contact point.