JPS60146729A - Traveling operation structure for working car - Google Patents

Abstract

PURPOSE:To make accurate pedal shifting attainable, by making a traveling nonstep transmission, which selects from the forward side to the backward side by interposing a neutral state in between, so as to be operatable by one pedal being energized to the neutral position. CONSTITUTION:When tiptoe is put on a forward pedal operating part 11a and the heel is placed on a second operating pedal 17 for pedal operation, a first pedal 11 rocks in an arrow F direction, an operating arm 7 rocks to the forward side, as well as when force is added to the heel, the first pedal 11 rocks in an arrow R direction via the second pedal, making the operating arm 7 turn to neutral from low speed. Next, when the tiptoe is put on the second pedal 17 and the heel is placed and stepped on a backward pedal operating part 11b, the first pedal 11 rocks in the R direction and the operating arm 7 rocks to the backword side, as well as when the tiptoe is made to step on strongly, the first pedal is made to turn to the neutral position from low speed via the second pedal 17.

Description

[Detailed Description of the Invention] *-x Joined H Yudai Mutsunoru Catfish I, 〒mcho, Yutsukuda 1fu Ukimi 4111 One piece with a continuously variable transmission for traveling that switches to the neutral position The present invention relates to an operation structure for traveling during work, which is configured to be operated by a first operation pedal.

In the above-mentioned work vehicle, conventionally, the transmission was forcibly returned to the neutral state or low speed side in order to make a sudden stop or deceleration, but when moving forward, the first operating pedal, which was placed on the driving step, was used to move backward. Move the operating pedal to the reverse side by placing it on the pedal, and when going backwards, transfer the toe that was placed on the driving steering wheel to the forward moving part of the operating pedal, and press the steering wheel to the forward side. and
Not only does it cause the trouble of having to change the foot position, but there is also the danger of pressing the pedal too far beyond the neutral position, to the opposite running position from the traveling side.

An object of the present invention is to enable forced deceleration of the FFI arrester and forced return to a neutral state without requiring the user to change the foot position and without causing over-operation to the opposite transmission position. .

The present invention provides the above-mentioned operation structure for driving a working vehicle,
An operated part is provided between the rocking axis of the first operating pedal and the forward stepping part, and between the rocking axis and the backward stepping part, and the second operating pedal is arranged such that: It is arranged so as to be able to rise and fall freely in the front and rear of both the stepping parts, and as the stepping operation is performed, the pair of operated parts are pressed and operated.
It is characterized by the fact that it can fit within one inch when the operation pedal is operated to the neutral position, and its functions and effects are as follows.

In other words, the pair of operated parts are 11t both front and rear of the first pedal swing axis! They are located opposite to each other by IK, and the distance between the first pedal rocking axis and the 1ilJ advancing depression portion is larger than the distance between the first pedal rocking axis and the front measuring operation portion, and
The distance between the first pedal swing axis and the rear operated part is
Because the distance between the pedal rocking axis and the backward stepping part is larger, when going through a turn, you can step on the pedal with your toes on the t, g+J going stepping parts, and your heel on the second pedal. When the pedal is depressed, the first pedal swings toward the forward speed side. When the pedal is depressed with force toward the heel, the second pedal presses the operated part, and the first pedal swings toward the slow speed side. Eventually it will reach a neutral position. When going backwards, if you step on the second pedal with your toes on the second pedal and your heel on the backward step, the first pedal will swing in the reverse direction, so put the force toward your toes. When the pedal is depressed in this state, the second pedal presses the operated part, and the first pedal swings toward the low speed side and finally reaches the neutral position. Therefore,
Both when moving forward and backward, the transmission can be forced to decelerate or return to the neutral state without having to change foot positions, allowing the system to accurately return to the neutral state. This makes it possible to make sudden decelerations and sudden stops easily and reliably. Moreover, a pair of operated parts and a second operation <,, tvte, , f, bMnomR
Afxlllmzk-1+, Mfllr' and I was at an advantage.

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

As shown in FIG. 1, at the rear of the wheeled traveling machine, there is a lift arm 111 that can be driven up and down to connect various working devices such as a rotary tiller so that it can be raised and lowered, and a retarding tiller. An agricultural tractor is constructed by providing a power-transmitting help extraction shaft (2).

The transmission system from the engine (3) to the front wheels (4) and rear wheels (5) is equipped with a hydraulic continuously variable transmission (6) that can shift 9J between the forward and reverse sides while in a neutral state. The transmission 11161 is operated according to the operation structure shown in FIGS. 2 to 4 to perform forward/reverse switching, traveling speed change, and stopping operations of the aircraft.

In other words, one first operating pedal (first operating pedal) is linked to the first operating team (7) of the transmission [(6) via a push/pull rond (8), a swinging member (9), and a rotating shaft. , the transmission gear 4 forming the traveling body can freely swing around its axis (P,) via the rotating shaft (1o), and a swing support arm is attached to the transmission (6). The roller 04) attached to the operating arm (7) so as to be able to swing up and down via the
) is biased by a spring (129) on the V-shaped cam surface (7a) at the lower end of ) to bias the transmission (6) to the neutral state and the first operating pedal (1K) to the neutral position. Between the pivot axis (Pl) of the first operating pedal (II) and the forward depression g (llsi), and between the pivot axis thc
A pin-type operated part (16M) that protrudes to the outside of the damage bond is attached to each of the darkness of the p1> and the backward stepping part (llb).
(16b)! &bt Sase, these operated parts (16a
), (16b) and above both stepping portions (ll
a) The second operating pedal 0η placed between the front and back of (llb), the stay (17m), the support a, -muttS,
The axis of the connecting pin (II) is attached to the operating step via the pivot connecting pin (II) and the grout so that it can freely swing up and down in 6 rotations, and a spring ( 2) The operated part (16m)
, (16b) The VC contact is energized, and as the first operating pedal (l) is swung by the forward depression part (lla), the second pedal Oη is moved to the rear operated part (16b). ), and the first operating pedal (
11) is swung, the second operation pedal riff) is qt
As the second operation peg lever η in the raised state is pushed up and swung by the t-side operated part (lea), the rear operated part (16b
) or press and operate the front side wave operating section (16a') to return the first operating pedal (river to the low speed side), and further operate both wave operating sections (16a) and (16b) to suppress it. This is an attempt to manipulate the first operating pedal (11) to the neutral position.

In other words, as shown in FIG.
If you press the pedal with the VC on it, the first operation pedal (
The second maneuver ('[ The first operating peggle 111 swings in the direction of the arrow 1ull via the pegulu, forcing the operating arm (7) to move to the low speed side (Vc) and finally to the neutral position, CJb. As shown in FIG.
When you press the pedal with your heel resting on the reverse pedal (llb), the first operating pedal (Il) swings in the direction of the arrow (8) and the operating arm (7) moves to the reverse side. By pressing the toe with force from this state, the first operation pedal Oη is activated via the second operation pedal Oη.
This allows the operation pedal (11) to be returned to the forced Vc discharge speed side and finally to the neutral position.

In addition, as shown in FIG. 2 (231 is a first operation pedal (a damper that provides rocking resistance to the river).

The second operation pedal Qη may be mounted so as to be raised and lowered in parallel via a reciprocating link mechanism or the like.

The present invention can also be applied to various work vehicles such as combines and transport vehicles.

[Brief explanation of the drawing]

The drawings show an example of the operation structure for driving a working vehicle according to the present invention, and FIG. 1 is a side view of an agricultural truck, and FIG. The figure shows the pedal description 2N
FIG. 4 is a plan view of the beggle installation part, FIG. 5 is an explanatory diagram of the operation key when moving forward, and FIG. 6 is an explanatory diagram of the operation key when moving backward. (6) Continuously variable transmission, lt)...
First operation pedal, (16a), (113b)...
...Operated part, (1 odor...2nd operation pedal. Agent Patent attorney Osamu Kitamura Figure 1 m5 Figure ?jS 5 p;!+

Claims (1)

[Scope of Claims] A continuously variable transmission device (6) for driving that switches between the forward and reverse sides while in a neutral state is controlled by a first operating pedal (11) that is in the neutral position. A driving operation structure for a work vehicle configured to operate the first operation beggle (Il).
)'s oscillating axis (P□) and the forward stepping part (lla)
An operated part (16a) or (lab) is provided between the dark side and the driving axis (Pl) (!l: backward stepping part (llb)), and the second operation is performed. Pedal 07),
It is arranged so as to be able to descend freely between the front and back of both the depression parts (lla)' and ``(llb), and as the depression operation is performed, the pair of operated parts (16a)'(<16b) are pressed. 1st operation pedal (+1
) is operated to the neutral position.