JPS5836839Y2 - Diesel engine engine stop device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an engine stop device that can be pressed on a diesel engine.

Generally, in a diesel engine, the engine is stopped by manually operating an engine operation control member such as an accelerator lever or a stop lever to stop the supply of fuel or air or reduce the compression pressure in the combustion chamber.

In addition to the above-mentioned manual engine stop, this invention
The main purpose is to be able to automatically stop the engine by switching the engine stop switch, and to be able to stop the engine either manually or automatically.

Moreover, it is an object of the present invention to enable the operating force of the rotary linen renoids constituting the operating medium for automatic stop to be transmitted to the driven members thereof more reliably and with a simple structure.

Examples of this invention will be described below based on the drawings.

FIG. 1 is a perspective view showing an operation control mechanism of a fuel injection pump when a diesel engine is mounted on a tractor.

In the figure, a control rack 2 of a fuel injection pump 1 is operated by an accelerator lever 5 via a governor lever (operation control member) 3 and a governor spring 4, so that the amount of fuel supplied is adjusted.

The governor lever 3 also transmits the speed regulating operation of a governor (not shown).

Reference numeral 6 denotes a hand-operated lever for remotely controlling the accelerator lever 5 via a rod 7.

In order to stop the engine, an engine stop device S consisting of an automatic stop operation system 8A and a manual stop operation system 8B is provided in addition to the above-mentioned accelerator device.

Both automatic and manual stop operation system 8A. The operating force of 8B is transmitted to the governor lever 3 via the stop lever 9.

The stop lever 9 includes an outer lever 10 that is operated externally,
It consists of this and an inner lever 12 that swings together via a shaft (swing center shaft) 11.

A driven piece 13 is protruded from a portion near the tip of the governor lever 3, and the above-mentioned inner lever 12 is disposed facing the swing locus of this driven piece 13.

As shown in FIG. 2, the shaft 11 is supported by a lid 14 that closes the inspection port of the pump housing chamber.

The stop lever 9 is operated by a torsion coil spring (not shown).
It is always energized to the standby position shown in FIG.

The automatic stop operation system 8A described above is composed of a rotary linenoid 15, a battery 16 that serves as a power source for the rotary linenoid 15, and a key switch (engine stop switch) 17 that controls energization of the solenoid 15.

The solenoid 15 is attached to a bracket 1B that is fixed together with the lid body 14 with bolts, and in this state, the output shaft 15a
is fitted into a groove 11a formed at the outer end of the shaft 11, so that the operating force is directly transmitted to the stop lever 9.

The above-mentioned key switch 17 has the on position of the main circuit that supplies power to the engine and the tractor's electrical components on the right side, and the engine stop position T on the left side, based on the off position where the operation key is inserted and removed. It will be set up.

The contact 17a operated by the operation key returns from the engine stop position T to the off position by itself.

The manual stop operation system 8B is an operation rod (mechanical transmission member)
20 is connected to the outer lever 10 near the swinging light end.

In FIG. 3, reference numeral 21 is an adjustment screw for adjusting and regulating the amount of swing of the stop lever 9. As shown in FIG.

To stop the engine, move the key switch 17 to the engine stop position T and drive the solenoid 15, or pull the operating rod 20 and move the stop lever 9□ to the engine stop side. , the control rack 2 is moved to the no-injection position via the governor lever 3.

At this time, the operating force of the solenoid 15 is directly transmitted to the shaft 11 from its output shaft 15a.

Therefore, compared to a structure in which the solenoid 15 and the stop lever 9 are interlocked and connected via a relay lever or link, the structure is simpler and the operating force can be transmitted reliably without reducing the efficiency of transmitting the operating force. .

FIG. 4 shows another embodiment.

In this case, the outer lever 10 is loosely fitted onto the shaft 11, and the operating force of the lever 10 is applied to the pin/2 which is fixed to the base end boss of the outer lever 10.
2 and a passive pin 23 fixed to the shaft 11 in a penetrating manner, so that when the shaft 11 is driven by the solenoid 15, the outer lever 10 and the operating rod 20 are not interlocked with this driving operation. It is composed of

As a modification other than the above, the rack pin of the control rack (operation control member) 2 may be extended, and this may be attached to the inner lever 1.
2, a valve (operation control member) is provided in the intake passage to open and close the valve, and this valve is operated by an engine stop device S to stop the engine. A stop switch is provided to control the energization of the solenoid 15, and the engine stop position T of the key switch 17 explained in the above embodiment is provided to coincide with the operation key extraction position (off position), and the solenoid is 1
It is conceivable to interpose a timer in the power supply path to 5.

As explained above, in this invention, the engine stop device is configured with both manual and automatic stop operation systems, and the engine can be stopped either automatically or manually. A reliable and highly reliable manual stop operation system can be used effectively depending on the situation, such as in normal situations and when stopping work in an emergency.

In addition, the rotary linenoid, which serves as the stopping operating medium for the automatic stopping operation system, is directly connected to the swing center axis of the stop lever, so that the operating force of the solenoid is directly transmitted to the stop lever, so that the operating force of the solenoid is directly transmitted to the stop lever via the intermediate transmission member. Compared to the case where the operating force is transmitted, the automatic stop operation system can have a simpler structure,
Not only can the manufacturing cost be reduced, but also the transmission loss of operating force can be eliminated.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a perspective view showing the operation control mechanism of the fuel injection pump, Fig. 2 is a longitudinal sectional side view of the first fixed part, and Fig. 3 is Fig. 2 4 is a front view corresponding to FIG. 3 showing another embodiment. 1... Fuel injection pump, 2, 3... Operation control member (
2...Control rack, 3...Governor lever)
, S... Engine stop device, 8A... Automatic stop operation system, 8B... Manual stop operation system, 9... Stop lever, 10... Outer lever 11... Swing center shaft, 12...
...Inner lever 15...Rotary solenoid, 17.
...Engine stop switch (key switch), 20...Mechanical transmission member (operation iron).

Claims (1)

[Scope of utility model registration request] The engine operation control member is forcibly moved from the engine operation position to the engine stop position by automatic and manual stop operation systems 8A and 8B, respectively, via a stop lever 9 that is swingably supported on a fixed wall. The manual stop operation system 8B is composed of a mechanical transmission member 20 that operates the stop lever 9, and the automatic stop operation system 8A uses the rotary solenoid 15 as a stop actuator, and the manual stop operation system 8B includes at least the rotary solenoid 15 and the rotary solenoid 15 as a stop actuator. , an engine stop switch 17 for controlling energization of the solenoid 15, and a power source for the solenoid 15.
An engine stop device for a diesel engine, which is directly connected to the operating shaft 15a' of No. 5 and the swing center shaft 11 of the stop lever 9.