JPS6225938Y2 - - Google Patents

Description

[Detailed explanation of the invention] As is well known in the art, in mobile agricultural machinery such as tractors, a safety switch is installed in the engine starter circuit that turns on when the clutch is in the disengaged state or the transmission mechanism is in the neutral state, so that the traveling system cannot run. It is designed to allow the engine to start only under certain circumstances and prevent the vehicle from starting suddenly.

However, with such a conventional circuit configuration, if the engine stalls at a dangerous location such as a railroad crossing, it is difficult to quickly escape using the power of the cell starter.

This device is designed to prevent the vehicle from starting suddenly by providing a safety switch in the engine starter circuit, but also provides an emergency switch in parallel with the safety switch so that the emergency switch turns ON when the throttle lever is in a position equivalent to engine stop. This allows the starter circuit to be connected by operating the throttle lever, making it possible to escape from a dangerous situation using the power of the starter, and at the same time prevents the engine from starting unexpectedly due to the emergency switch being ON.

Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows a tractor, which includes a body frame 2 on which an engine 1 is mounted, and a clutch mechanism connected to the output shaft of the engine 1. It has a clutch housing 3 and a transmission case 4 that houses a transmission provided between the clutch mechanism and the drive shaft, and the transmission is controlled by a gear shift lever 5. It's getting old. Further, a cell starter 7 is connected to the crankshaft of the engine 1, and the starter 7 is connected to a battery 6 via a safety device.

That is, as shown in the starter circuit diagram in FIG. 2, one end of the winding of the cell starter 7 is grounded, the other end is connected to one end of the starter switch 8 via the safety switch 9, and the other end of the starter switch 8 is connected to the battery. Connected to the + terminal of 6, battery 6
One terminal of is grounded. An emergency switch 10 is inserted between the cell starter 7 and the starter switch 8 in parallel with the safety switch 9.

The safety switch 9 is provided on the side of the clutch housing 3, and when the clutch pedal 11 at the tip of the clutch arm 11a provided at the end of the clutch operating shaft is stepped on, the back surface of the clutch petal 11 touches the operating lever of the safety switch 9. Press it to turn on safety switch 9.

12 is an instrument panel, where the starter switch 8, handle 13, and throttle lever 1 are installed.
4th class is equipped in close proximity.

The throttle lever 14 is pivotally supported in a direction parallel to the handle 13, has an L-shaped upper end, has a grip at its tip, and is provided to be able to rotate and move up and down. . This is shown in Figures 3 and 4.
To explain in detail with Figure a and Figure 4 b, in the figure, 15
a is a bush, 15b is the support plate, and 15c is a lower support plate, all of which are provided on the instrument panel 12.
A, 15b, and 15c are inserted and supported. 16
is a winding spring that urges the throttle lever 14 upward, and the washer 1 provided on the throttle lever 14
7 and the lower support plate 15c. 1
Reference numeral 8 denotes an arm attached to the lower end of the throttle lever 14, and a square hole drilled in the base of the arm is fitted into the square shaft of the lower end of the throttle lever 14 to be fixed therein, and 19 is a fixing nut. A pin 18a is protruded from the upper end of the arm 18, and the rear end of a throttle operation wire 20 extending from the engine 1 is connected to this pin 18a. The throttle lever 14 is provided on the left side of the handle when viewed from the seat 21 side, and as shown in FIG. 5, the engine 1 rotates at a higher speed as it is rotated counterclockwise. In addition, ST is stop, L is low speed, H
indicates their respective positions at high speed.

On the other hand, 22 is an emergency switch holder, which is erected above the tip of a bracket 23a that protrudes leftward from the handle column 23 that pivotally supports the handle 13, and is shaped like a square.
In the low-speed setting position of the throttle lever 14, the hanging side 18b provided on the low-speed side of the tip of the arm 18 comes into contact with it, and serves as a stopper for the throttle lever 14, as well as for vertical operation. It is now designed to provide guidance. The lower side 22b of the emergency switch holder 22 is located at a position set back from the upper side 22a, and the emergency switch 10 is attached thereto, with its operating rod 10a protruding inward. Then, the throttle lever 14 is pushed down and rotated clockwise, so that the hanging side 18b of the arm is connected to the operating rod 1 at the position ST where the engine stops.
The emergency switch is configured to turn on by pressing 0a.

24 is an engine stop lever. During normal work, the throttle lever 14 is operated within a range from low speed to high speed, so the engine is stopped by the stop lever 24 mentioned above.

The present invention is constructed as described above, and when starting the engine 1, the clutch pedal 1 is first
1, the clutch is disengaged and at the same time the operating lever of the safety switch 9 is pressed on the back side of the clutch petal 11 to connect the safety switch 9. If the starter switch 8 is pressed in this state to connect the starter circuit, the electric starter 7 is energized and the engine 1 is started, but at that time, the clutch is disconnected, so the aircraft will not start suddenly. If the engine stalls at a railroad crossing or the like and the vehicle cannot run, do not depress the clutch pedal 11, that is, leave the clutch engaged, and push the throttle lever 14 downward against the pressing force of the spring 16 to rotate the throttle clockwise. That is, when the throttle lever 14 is rotated forward, it reaches the stop position ST, and at this time, the hanging side 18b of the arm pushes the operating rod 10a of the emergency switch, and the emergency switch 10 is activated.
Turn on. Then, when the starter switch 8 is pressed, the electric starter 7 is energized and rotates, and the power is transmitted to the transmission via the clutch, so if the transmission is shifted to a low speed, the tractor can be operated by the electric starter. 7 as a power source, and can quickly escape from dangerous places such as railroad crossings.

When performing this escape operation, in the present invention, the throttle lever 14, which is provided close to the handle 13 and located at the most convenient position during driving operation, is also operated, and this lever 14 is moved to the stop position ST. It is possible to escape quickly and easily by simply activating it, and it can be performed very conveniently as an emergency operation in an emergency. During this evacuation maneuver, if the malfunctioning engine happens to restart, the aircraft may suddenly fly out, which is extremely dangerous. 14 is always set at the stop position ST, there is no risk of the engine restarting, and the escape operation can be performed extremely safely and reliably.

Furthermore, as in the embodiment of the present invention, the range of use of the throttle lever 14 is different between normal operation and emergency operation.In emergency operation, the throttle lever 14 is pressed down one step against the pressing force of the spring 16. If you do this, you will be safe without the risk of accidentally activating the starter.

In the above embodiment, the safety switch 9 is configured to be turned ON when the clutch is in the disengaged state, but the present invention is not limited to this, and for example, the safety switch 9 may be activated in conjunction with a neutral operation of the transmission to turn ON the safety switch 9. It may be used for those who have.

The present invention thus provides a mobile agricultural machine equipped with a safety switch 9 that connects the starter circuit of the starter motor 7 when the clutch is disengaged or the transmission mechanism is operated in a neutral manner.
4, a rotary throttle lever 14 for controlling the rotational speed of the engine 1 to high or low is provided, and an emergency switch 10 is provided corresponding to the engine stop position of the throttle lever 14. 10 is installed in the starter circuit in parallel with the safety switch 9, so the safety switch 9 is provided in the starter circuit of the engine 1 so that it is connected only when the clutch is disconnected or the transmission mechanism is in the neutral position. Although this device prevents the vehicle from suddenly starting when the engine 1 is started, the throttle lever 14 is placed in the engine stop position in parallel with the safety switch 9, instead of the stop lever 24 that normally stops the engine 1. Since the emergency switch 10 installed at 7 as a power source, it is possible to escape from a dangerous area smoothly.

Moreover, the emergency evacuation setting operation can be performed with just one handle.
Since the engine stop position of the throttle lever 14 is located at the most convenient position for driving operations near 3,
It is extremely easy to operate and is suitable for emergency escape.

[Brief explanation of the drawing]

The drawings show a tractor equipped with the device of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an electric circuit diagram, Fig. 3 is a sectional view of main parts, and Fig. 4a is an explanation of the operation. FIG. 4b is a cross-sectional view of the main part for explaining the function, and FIG. 5 is a plan view of the main part for explaining the function. 6...Battery, 7...Cell starter, 8
...Starter switch, 9...Safety switch,
10...Emergency switch, 11...Clutch petal, 14...Throttle lever, 20...Throttle operation wire, 22...Emergency switch holder.

Claims (1)

[Scope of utility model registration request] A mobile agricultural machine equipped with a safety switch 9 that connects the starter circuit of the starter motor 7 when activated in connection with clutch disengagement or neutral operation of the transmission mechanism,
A stop lever 24 for the engine 1 is provided, and a rotary throttle lever 14 for controlling the rotation speed of the engine 1 is provided. A starting safety device for a mobile agricultural machine, characterized in that the emergency switch 10 is interposed in the starter circuit in parallel with the safety switch 9.