JPS63165354U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a side view showing the configuration of a wheeled tractor shovel, Figure 2 is a side view of the wheeled tractor shovel while it is running, Figure 3 is an electric/hydraulic system diagram of this invention, and Figure 4 is a side view showing the configuration of the wheeled tractor shovel. FIG. 2 is a main electrical system diagram showing a second embodiment of the present invention. 3... Working device, 8... Lift cylinder, 13
... Hydraulic switching valve for lift cylinder, 17 ... Solenoid switching valve, 18 ... Slow return valve, 20 ... Vibration suppression circuit, 29, 43 ... Relay, 32 ... Transmitter, 33, 41 ... Speed meter , 34...frequency discriminator.

Claims (1)

[Claims for Utility Model Registration] (1) Wheel-type construction in which one end of a working device is attached to the vehicle body in an articulated manner, and a hydraulic cylinder supports the weight and working load of the working device, or allows it to perform predetermined rotational movements. A machine that is equipped with a transmitter that generates an electrical signal proportional to the rotation speed of the running wheels or its drive system, and a speedometer that receives the electrical signal and displays the running speed of the vehicle. In the branch pipe of the pipe that communicates with the oil chamber of the hydraulic cylinder on the side where pressure is generated due to load,
The internal oil line is closed by the biasing force of a spring, and the accumulator is connected to the pipe via a solenoid switching valve that is opened by an electric signal from the outside, and a slow return valve is installed in the middle of the pipe. Furthermore, the output circuit of the transmitter is branched and led to the relay circuit input section of the relay that opens and closes the main electric circuit, and when the electric signal from the transmitter exceeds a predetermined value, the relay circuit is closed and the relay is activated. An automatic vibration suppression device for a wheeled construction machine, which is provided with a relay that closes a main electric circuit, and a power source is connected to a receiving section of an electromagnetic switching valve via the relay. (2) The speedometer has a built-in limit switch that activates an actuator and closes an internal electric circuit when the pointer of a centrifugal speedometer that is driven by the rotation of the running wheels or its drive system exceeds a certain value. An automatic vibration suppressing device for a wheeled construction machine according to claim 1, which is connected to a terminal of the limit switch in the middle of a relay circuit of a relay that connects and disconnects power to a receiving section of a switching valve.