JPS6145308Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a throttle device for a diesel engine installed in a walk-behind tiller or the like.

Conventionally, when starting a diesel engine,
It is necessary to raise the throttle lever from the stop position to the start position, but if the throttle lever and engine are located far apart, such as in walk-behind tillers, after returning to the handle and operating the throttle lever, , it was necessary to perform the starting operation from the engine position at the front of the aircraft, which was very troublesome. In addition, there were times when I had to start the engine repeatedly without remembering to operate the throttle lever.

Therefore, the present invention provides a lock arm adjacent to the throttle arm, connects the lock arm to a decompression lever, and rotates the lock arm based on the operation of the decompression lever. A diesel engine throttle device is provided in which the throttle arm is rotated to the starting position, and a locking portion formed on the lock arm locks and holds the throttle arm at the starting position, thereby eliminating the above-mentioned drawbacks. The purpose is to provide

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the walk-behind cultivator 1 has a body 3 supported by wheels 2, and a diesel engine 5 is mounted in front of the body 3.
Further, a handle 6 extends toward the rear of the fuselage 3. A throttle lever 7 is disposed at the tip of the handle 6, and the lever 7 is connected to a throttle arm 9 of the engine 5 by a Bowden wire 8.
is connected to. Further, as shown in FIG. 2, a decompression lever 10 used for starting is provided in the engine 5 portion, and a lock arm 11 is provided adjacent to the throttle arm 9 so as to be rotatable around a pin 12. ing. The lock arm 11 has a bell crank shape, and one end 11 of the lock arm 11 has a bell crank shape.
a is connected to the decompression lever 10 via a rod 13 and a spring 15, and the tip of the other end is bent into a key shape, and the key-shaped portion 11b rotates in conjunction with the throttle arm 9. A shallow locking recess 11c is formed in the key-shaped portion 11b to receive a pin 9a at the tip of the throttle arm 9. In the figure, 16 is a return spring for the decompression lever 10, and 17 is a return spring for the throttle arm 9.

Since this embodiment has the above-described configuration, when starting the diesel engine 5, the decompression lever 10 is rotated against the spring 16 from the A position shown by the chain line to the B position shown by the solid line, and the diesel engine 5 is started. Reduce pressure to facilitate its rotation. Then, the lock arm 11 is rotated via the rod 13 and the spring 15 from the C position shown by the chain line to the D position shown by the solid line.
, and is rotated from the stop position E shown by the chain line to the start position F shown by the solid line. In this state, the pin 9a of the throttle arm 9 is received in the locking recess 11c of the lock arm 11, and the fulcrum pin 1
2 to the outer periphery of the pin 9a is larger than the distance l from the fulcrum pin 12 to the protrusion 11d forming the recess 11c. That is, pin 9
a engages with the recess 11c due to the biasing force of the return spring 17, and as a result, the throttle arm 9
The lock arm 11 constitutes a three-bar link and is locked and held at that position. Therefore, even if the decompression lever 10 is returned to the A position and the depressurization of the diesel engine by the decompression valve is released to start the engine, the lock arm 11 remains in the D position, and the spring 15 is bent and the decompression lever Absorb 10 movements. Then, the tiller 1 is started with the throttle arm 9 in the starting position F, and the tiller 1 works after the engine starts.
When the throttle lever 7 is operated and the throttle arm 9 is rotated once toward the high speed side shown by arrow G, the engagement between the pin 9a and the recess 11c is released, and the throttle arm 11 is returned to position C by its own weight. .

As explained above, according to the present invention, even if you forget to operate the throttle lever 7 at the time of starting,
By operating the decompression lever 10, the slot arm 9 is moved to the starting position F by the lock arm 11.
Since the throttle lever 7 is rotated and locked, there is no need to return to the handlebar 6 position and operate the throttle lever 7, making the operation easier and improving work efficiency. This eliminates the need to repeat the starting operation over and over again. Furthermore, even if the decompression lever 10 is returned to its original position, the locking portion 11c of the lock arm 11 holds the throttle arm 9 in the starting position. This makes the starting operation extremely simple and allows for reliable starting.

[Brief explanation of drawings]

FIG. 1 is a side view showing a walk-behind tiller to which the present invention is applied, and FIG. 2 is a side view showing the main parts thereof. 5... Diesel engine, 9... Throttle arm, 9a... Pin, 10... Decompression lever, 11... Lock arm, 11b... Interlocking part (key shaped part), 11c... Locking part, 13, 15 ...Connection (rod), (spring), F...starting device.

Claims (1)

[Scope of utility model registration request] In a diesel engine having a decompression lever and a throttle arm, a lock arm is rotatably provided adjacent to the throttle arm, the lock arm is connected to the decompression lever via a spring, and the slot arm is interlocked with the lock arm. A locking portion is formed to lock the throttle arm at the engine starting position and hold the throttle arm at that position even when the decompression lever is returned, and the decompression lever When the lock arm rotates based on the operation, the interlocking section interlocks and rotates the throttle arm to the starting position, and the locking section locks and holds the throttle arm at the starting position. Diesel engine throttle device.