JPS6228671Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has an accelerator pedal linked to an engine-side accelerator operating member that can be operated from an idling position to an engine stop position, and a hand that continuously sets the return position of the accelerator pedal by a spring. This invention relates to an accelerator operating section of a work vehicle equipped with a lever.

Conventionally, as shown in FIG. 5, the accelerator operating section of the above-mentioned work vehicle includes an engine-side accelerator operating member in order to maintain the idling state of the engine 8 after the engine starting operation is performed by depressing the accelerator pedal 18. 15 is neutrally biased to the idling position I, and the accelerator pedal 18 and the hand lever 21 for holding the return position are linked only from the idling position I to the high engine speed side H, and when the engine 8 is stopped, the hand lever 21 is 2
1 to the engine stop operation permissible position S', press the accelerator operating member 15 and accelerator pedal 1.
By operating a stop lever 25 interposed in an interlocking mechanism 19' with 8, the accelerator operating member 15 is operated toward the engine stop position S against its neutral biasing spring 14'. However, each time the engine was stopped, two operations were required, one for the hand lever 21 and the other for the stop lever 25, and the engine stop operation was cumbersome, so there was room for improvement in terms of operation.

In view of the above-mentioned circumstances, an object of the present invention is to improve operability by making it possible to stop the engine with a single operation, while providing the same functions as conventional ones.

The characteristic configuration of the present invention is that the hand lever is attached to the accelerator operation section of the work vehicle so as to be operable at the engine stop position, and the accelerator pedal is moved to the engine stop position when the hand lever is operated to the engine stop position. The hand lever is mounted so as to be displaced to an engine stop position by a spring, and as the accelerator pedal is operated from the engine stop position to a high speed side H beyond an idling position, the hand lever is displaced from the engine stop position to an idling position. It is linked to the hand lever so that the

In other words, when the hand lever is operated to the engine stop position, the accelerator pedal is displaced to the engine stop position by its return spring and the engine is stopped. The engine can be stopped with just one operation. Furthermore, at the time of starting, the hand lever is moved from the engine stop position to the idling position by depressing the accelerator pedal from the engine stop position to the idling position to the high speed side. Therefore, after the engine is started by depressing the accelerator pedal, the accelerator pedal can be held at the idling position by the accelerator pedal return position setting action of the hand lever. Therefore, the engine can be stopped simply by operating the hand lever, and when starting the engine, the engine can be kept idling by simply depressing the accelerator pedal once, and by adjusting the hand lever, the engine can be pressed freely to the high speed side. It can also run at a constant speed, and while it has the same functionality as the conventional configuration, it has greatly improved operability.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIGS. 1 and 2, a fuselage frame 2 equipped with a pair of left and right crawler traveling devices 1 includes an operating panel 3 and a driver's seat 4 on which various control tools are arranged.
A boarding operation section 5 is provided, and an automatic threshing device 6 is installed, and a planted grain culm reaping device 7 is connected to the front end of the machine frame 2 so that it can be driven up and down. The combine harvester is configured to reap and thresh the planted grain culms in the field as the machine moves.

As shown in FIGS. 3 and 4, the drive structure of the crawler traveling device 1 includes a pair of variable displacement hydraulic pumps 9 directly connected to the engine 8, and A pair of left and right running hydraulic motors 12, which are interlocked and connected to the drive sprocket 10 via a gear transmission mechanism 11, are separately connected via piping, and a pair of left and right running operation levers 13 provided on the operation panel 3 are connected to each other via separate piping. The operation arms 9a of each pump 9 are individually linked and connected, and the discharge amount and discharge direction of each pump 9 are individually controlled by operating the travel operation lever 13 to perform travel and steering operations of the aircraft. It is structured as follows.

To explain the accelerator operation structure of the engine 8 in more detail, the engine 14-side accelerator operation arm 15 is urged toward the engine stop position S by a spring 14, and the spring 17 is swingably supported on a horizontal support shaft 16 of the fuselage. A rocking arm 18a integrally connected to an accelerator pedal 18 disposed below the operating panel 3 is interlocked and connected to the accelerator pedal 18 by a wire 19 while the accelerator pedal 18 is biased toward the engine stop position S by a wire 19. an arm 20 integrally connected to a boss member 20 externally supported on the horizontal support shaft 16 adjacent to the pivot boss 18b;
a and the swinging arm part 21a of the hand lever 21, which is supported on the upper part of the operation panel 3 so as to be able to swing freely and to be held by friction at any swinging position, are interlocked and connected by a push/pull rod 22, In addition, the locking member 20b that contacts and locks the swinging arm 18a of the accelerator pedal 18 is attached to the hand lever 21 side boss member 2.
It is connected to the arm 20a of 0, and has a friction holding action by operating the hand lever 21 and a locking action of the locking member 20b linked thereto,
The return position of the accelerator pedal 18 by the spring 17 is set continuously from the engine stop position S to the maximum engine rotation speed position H, that is, the engine rotation speed is allowed to be operated by 8 engine rotations by depressing the accelerator pedal 18. However, the configuration is such that the appropriate rotational speed of the engine 8 during traveling work can be set and maintained by operating the hand lever 21, and the operation of holding the position of the accelerator pedal 18 with the foot is omitted, thereby facilitating the traveling operation during traveling work. There is.

Furthermore, one end side is locked to the accelerator pedal 18,
And the other end side is connected to the hand lever 21 side boss member 20
Coil spring 23 locked to arm 20a of
is attached to the pivot bosses 18b and 20 so as to fit over them, and when the hand lever 21 is in the engine stop position S, the accelerator pedal 18
By depressing and operating the hand lever 21 from the engine stop position S to a higher speed side H than the engine idling position I, the coil spring 23 causes the hand lever 21 to move from the engine stop position S to the idling position I against the friction holding force thereof. An elastic repulsion force sufficient for operation is added, and with this elastic repulsion force, the hand lever 21 is moved to the idling position I.
It is designed to automatically swing up to. When the accelerator pedal 18 is released following this operation, the hand lever 21 is moved as described above.
The accelerator pedal 18 is held at the engine idling position I by the frictional holding action of the engine, and by manually operating the hand lever 21 to the engine stop position S, the locking action of the locking member 20b is released. and each spring 1
Accelerator pedal 1 due to the urging forces of 7, 14, and 23
8 to an engine stop position S.

Further, 24 in the figure is a stopper that restricts the hand lever 21 and the accelerator pedal 18 to the engine stop position S.

That is, when starting the engine, the hand lever 21 can be automatically operated from the engine stop position S to the engine idling position I in conjunction with the depression operation of the accelerator pedal 18 accompanying the starting operation, and the engine 8 By making it possible to maintain the idling state of the engine, the operation at the time of starting is easy and simple, and
When the engine is stopped, the accelerator pedal 18 is moved to the engine stop position S by only one operation of the hand lever 21 to the engine stop position S, and the engine 8 can be stopped. In addition, the structure is such that operation when the engine is stopped can be easily and conveniently performed by omitting the operation of a necessary stop lever or the like.

Incidentally, as the hand lever 21 is operated to the engine stop position S, the accelerator pedal 18 is displaced to the engine stop position S by the spring 17, and the accelerator pedal 18 is moved from the engine stop position S to the idling position I to reach high speed. Various configurations are possible for the specific linkage structure that links the hand lever 21 and the accelerator pedal 18 so that the hand lever 21 is displaced from the engine stop position S to the idling position I as the hand lever 21 is operated to the side H. be.

The present invention is directed to accelerator operating units in various types of work vehicles such as agricultural work vehicles and construction work vehicles.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment and a conventional example of the accelerator operating section of a work vehicle according to the present invention, FIG. 1 is an overall side view of the combine, FIG. 2 is an enlarged plan view of the driving section,
FIG. 3 is a schematic system diagram showing a drive operation structure, FIG. 4 is a - line view of FIG. 3, and FIG. 5 is a schematic system diagram showing a conventional accelerator operation structure. 15... Accelerator operation member, 17... Spring, 18... Pedal, 21... Hand lever, I
...Idle position, H...High speed side, S...Engine stop position.

Claims (1)

[Scope of utility model registration request] An engine side accelerator operation member 15 that can be freely operated from an idling position I to an engine stop position S,
An accelerator operation part for a working vehicle, which is provided with a hand lever 21 that interlocks an accelerator pedal 18 and continuously sets the return position of the accelerator pedal 18 by a spring 17, the hand lever 21 being moved to an engine stop position S. The accelerator pedal 18 is mounted so that it can be operated freely, and the accelerator pedal 18 is mounted so that it is displaced to the engine stop position S by the spring 17 when the hand lever 21 is operated to the engine stop position S. As the engine is operated from the engine stop position S beyond the idling position I to the high speed side H, the hand lever 21 moves to the engine stop position S.
An accelerator operating section for a working vehicle, characterized in that the accelerator operating section is linked to the hand lever 21 so as to be displaced from the idling position I to the idling position I.