Dump truck power take-off switching and reversing protection device
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A protection device and power take-off technology, which is applied to signal devices, sound signal devices, vehicle components, etc., can solve problems such as danger and insufficient handbrake braking force, and achieve the effects of low cost, simple circuit and convenient use.
Active Publication Date: 2016-04-06
ANHUI HUALING AUTOMOBILE
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[0014] Suffocate and turn off the engine, if the handbrake is not strong enough or pulled up, it is very dangerous
Method used
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[0021] from figure 1 , figure 2 Visible: the present invention comprises the Siemens small-scale programmable logic controller PLC that the model that program is written is CPU224, and its connection terminal L+, 1L+, 2L+ connects battery positive pole, and its terminal M, 1M, 2M connect battery negative pole (omitted in the figure Draw), its output point Q0.0 is connected to one end of the relay J coil, the other end of the relay J coil is connected to the negative pole of the battery, and the normally open contact of the relay J is connected in series between the power take-off solenoid valve F and the battery E; The speed signal (pulse signal) ERPM is connected to the input point I0.0 of the controller, and the input points I0.1, I0.2, I0.3, I0.4, and I0.5 are respectively connected to the power take-off switch K1, Neutral travel switch K2, reverse travel switch K3, parking brake air pressure switch K4, one end of cargo box off-position travel switch K5 installed at the j...
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Abstract
The invention discloses a PTO (Power Takeoff) switching and reverse protecting device of a dumper. The PTO switching and reverse protecting device comprises a PLC (Programmable Logic Controller), wherein a terminal L+, a terminal 1L+ and a terminal 2L+ of the PLC are connected with an anode of a storage battery, a terminal M, a terminal 1M and a terminal 2M of the PLC are connected with a cathode of the storage battery, an output point Q0.0 of the PLC is connected with one end of a relay coil, the other end of the relay coil is connected with the cathode of the storage battery, and a normally open contact of a relay is connected between a PTO electromagnetic valve and an accumulator in series; an engine rotating speed signal is connected to an input point I0.0 of a controller, an input point I0.1, an input point I0.2, an input point I0.3, an input point I0.4 and an input point I0.5 are respectively connected with one end of a PTO switching switch, one end of a neutral gear travel switch, one end of a reverse gear travel switch, one end of a parking brake air pressure switch and one end of a packing box off-location travel switch, and the other ends of the PTO switching switch, the neutral gear travel switch, the reverse gear travel switch, the parking brake air pressure switch and the packing box off-location travel switch are all connected with the anode of the storage battery; a display screen is connected with the PLC. According to the PTO switching and reverse protecting device of the dumper, disclosed by the invention, the cost is low, safety and reliability are realized, the circuit is simple, and the use is convenient; a fault can be clearly displayed on the display screen, and a good man-machine interaction function is obtained.
Description
technical field [0001] The invention relates to a protection device for a dump truck. Background technique [0002] The power take-off is a set of variable speed gears, also known as the power output device, which is generally composed of a gearbox and a clutch. It is connected to the gearbox with a gear and connected to the lift pump with a shaft. It is a separate gear in the gearbox. position, engage this gear, and the power take-off will be able to operate as soon as you gas the pedal. Dump trucks, fire trucks, cement mixer trucks and other special vehicles that require extra power are obtained through a power take-off, and the power is turned on or off by a rocker switch in the cab to control the solenoid valve. In this case, the steps to open the power take-off are as follows: [0003] Step 1: Put the gear lever in neutral, stop the vehicle, and apply the handbrake for sure. [0004] Step 2: Start the vehicle. [0005] Step 3: Depress the clutch pedal, and then push...
Claims
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