JPH0274418A - Travel pedal for tractor and the like - Google Patents

Abstract

PURPOSE:To prevent either of an advance or reverse pedal opposite to each other from projecting in a reverse direction when one of the pedals is stepped down by providing engagement pins each stepped and turned integrally with a corresponding interlock body due to stepping down one of the aforesaid pedals. CONSTITUTION:In a forward travel, an advance pedal 4 is stepped down for coupling an engagement pin 6 to an interlock body 2 and turning a transmission control axis 1 from a neutral position N to an advance side F. In a backward travel, a reverse pedal 5 is stepped down for coupling an engagement pin 7 to an interlock body 3 and turning the transmission control axis 1 from the neutral position N to a reverse side R. In this case, only the advance pedal 4 or the reverse pedal 5 at a stepping side is stepped down and one of the aforesaid pedals 4 and 5 as not stepped down is not turned, thereby eliminating possible disturbance otherwise encountered due to the substantial upward projection of the pedals 4 and 5.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a running pedal for a tractor or the like.

Background Art and Problems to be Solved by the Invention A tractor that controls traveling speed by controlling the speed change control shaft of a hydraulic continuously variable transmission device to rotate forward and backward from a neutral position in forward and reverse directions. In some cases, when the operation of the shift control shaft is linked by pressing a pair of left and right forward and reverse pedals, for example, when one forward pedal is pressed, the reverse pedal on the opposite side moves in the opposite direction. Since it is pushed up and protrudes, it tends to get in the way of operation.

(Invention of Claim 1) Means for Solving the Problem This invention provides a system for moving forward and backward by rotating a speed change control shaft (1) from a neutral position (N) to a forward side (F) and a reverse side (R). Interlocking body that interlocks to change speed +21. +3+ and this interlocking body +2L (corresponding to 31), the interlocking body (2), (3) The driving pedal of a tractor or the like is provided with engagement pins 161 and 173 that are engaged with and rotated integrally.

Functions and Effects of the Invention When the foot is released from the forward pedal (41) and the reverse pedal (5) and the shift control shaft (1) is in the neutral position [(N), it is in a stopped state in which no traveling transmission is performed. When driving forward, depress this forward pedal (4).
The engagement pin (6) on the forward petal (4) side is connected to the interlocking body (2).
), the interlocking body (2) is integrally depressed and rotated, and the shift control shaft (1) is moved from the neutral position (N) to the forward side (
Rotate to F) to perform forward travel transmission.

The driving speed is increased sequentially, and the transmission travels at a speed corresponding to the amount of rotation of this speed change control shaft (11).In addition, when the forward pedal (4) is loosened at this time, this trailing petal (wings are on the upper side) When the vehicle is returned to the neutral position (N), the vehicle is decelerated, and traveling is stopped when the vehicle is returned to the neutral position (N).While the forward pedal (4) is depressed in this manner, the reverse pedal (5) does not move.6 When traveling backwards By depressing the reverse pedal (5), the engagement pin (7) on the reverse pedal (5) side is engaged with the interlocking body (3), and the shift control shaft (1) is moved to the neutral position ( N) to the reverse side (R) to perform reverse travel transmission and increase/decelerate.During this period, the forward pedal (4) does not move.

In this way, when the forward pedal (4) or the reverse pedal (5) is depressed, at the beginning of the depression, the engagement pin (6) or (7) is connected to the opposite interlocking body (2) or (3). This engagement causes the interlocking body (2) or (3) to move integrally with the forward pedal (4) or the reverse pedal (5) by pressing
) can be rotated to control the rotation of the shift control shaft (1), and at this time, only the forward pedal (4) or the reverse pedal (5) on the depressed side is operated, and the pedal is not depressed. Since the reverse petal (5) or the forward petal (4) is not rotated, it is unlikely to protrude significantly upward and become a hindrance.

(Invention of Claim 2) Means for Solving the Problem This invention provides a means for solving the problem by attaching these pedals (4), (
5) A traveling pedal for a tractor or the like is provided with a pedal pressure sensor (8, (9)) that performs gear change interlocking with the forward pedal (4) or the reverse pedal (5) by detecting the pedal pressure when stepping on the pedal. .

Functions and Effects of the Invention When the forward pedal (4) is depressed, the pedal pressure sensor (8) on the pedal surface detects this pedal pressure at the beginning of the pedal depression, and the gear change of the forward pedal (4) is linked, and the forward pedal (4) moves forward. A gear shift is performed.

At this time, since the pedal pressure sensor (9) does not detect the pedal pressure of the reverse pedal (5), the reverse gear shift is not linked. Further, the reverse gear change by depressing the reverse pedal (5) is performed in the same manner.

As described above, on the petal surfaces of the forward pedal (4) and the reverse pedal (5), there are pedal pressure sensors f81. (91 is provided, and the forward pedal (4),
Or, since it enables gear shifting by depressing the reverse pedal (51), the depressing pressure sensors (8) and (9) are on the pedal surface and detect the depressing pressure first, and the forward pedal (4) is activated.
.

Alternatively, the speed change of the reverse pedal (5) can be quickly and accurately performed.

Embodiment In FIGS. 1 and 2, the hydraulic continuously variable transmission (1) is an input to a transmission device that transmits a pair of left and right running axles (11), and performs main speed transmission. Speed change control When the shaft (11) is placed in the neutral position (N), no transmission occurs, and by rotating from the neutral position (N) to the forward side (F), the forward rotation transmission is accelerated, and the forward rotation side (F) The system is configured to sequentially decelerate by returning the shift control shaft (1) from the neutral position [(N) to the reverse side (R).
Reverse gear shifting is performed in the same manner when rotating to . At this time, the speed change transmission rotates in the opposite direction. A forward arm 0゜ and a reverse arm (131) are provided in the vertical direction at the tip of this speed change control shaft (1), and a crank arm-shaped interlocking body (2) rotatable on a petal shaft Q41, ( 3) is connected by the Rondo (19, (IQ), and by the rotation of these interlocking bodies [2) and (3) on the petal axis θψ, the speed change control shaft (
1) is rotated in forward and reverse directions around the neutral position (N). Furthermore, when these interlocking bodies (2) and (3) are in a state of free rotation, the shift control shaft (1), the forward arm 0, and the reverse arm (1'5) always return to the neutral position (N). It is set up like this.

The forward petal (4) and the reverse petal (5) on the petal shaft f+4) provided on the floor of the tractor body are attached to the interlocking body (
Engagement pins (61, +7) that protrude and retract toward the 2) and (3) sides.
] are provided so that the solenoids (1η, C18 operate electromagnetically to move in and out), and each solenoid (1η, (11 limit switch o'+e.

an arm (21) at the base of each opposing advancing petal (4);
Reverse pedal (5) base arm (ON, O by 2a)
FF, and connect the engaging pins (6) and (7) to the interlocking body +21.
(It is electrically actuated so that it can be protruded to the engagement position with 31 and retracted.)

The return springs of the arm (21), 2~ are the return springs of the arm (2δ), and are used for the forward petal (4) and the backward petal (4), respectively.
This is to return the 5-pin to the neutral position, opposite to the depression side.

The electric circuits of the nomit switches (19) and (2[) include:
When one of the limit switches is turned on, the relay contact (R2) is turned on, the solenoid (1η) is energized, and the engagement pin (6) is projected toward the interlocking body (2). When the limit switch (2 [1) is turned on, the relay contact (R1) is turned on and the solenoid (Ill) is energized, causing the engagement pin (7) to protrude toward the interlocking body (3).

When the forward pedal (4) is started to be depressed, the limit switch (191) is turned on in the 5th arm (21), the engagement pin (6) is projected toward the interlocking body (2), and the forward pedal (4) is depressed. The interlocking body (2) is rotated in the same direction, and the shift control shaft (1) is rotationally controlled from the neutral position (N) to the forward side (F).

By releasing the forward pedal (4), the spring (23
The limit switch (191 is OF
It becomes F. The speed change control shaft (11) also returns to the neutral position (N) while being decelerated.

When stepping on the reverse pedal (5), gear changes are also linked in the same way. At this time, limit switch +21 and engagement pin (7
), the interlocking body (3) is rotated to perform speed change control.

In Fig. 3, the points different from the above example are the engagement pin (6),
(7) is actuated by a cam Q9.2119 provided integrally with the petal (41, (5)), and the engaging pin (6)
, (7) are the corresponding forward petals (4) and backward petals (
The cam roller at one end of the crank pin (υ, (2e) is pushed by the cam 112sl, Qe by the crank pin (5), ffl against the arm portion of the crank pin (6), (7). ) is the crank pin (5),
It is eccentrically rotated at 121 and retracts to a position where it can engage with the interlocking bodies (21, (31).

In Fig. 4, the difference from the above example is that the forward pedal (4)
A pedal pressure sensor (8) is provided on the top surface, a pedal pressure sensor (9) is provided on the top surface of the reverse pedal (5), and these pedal pressure sensors (
[11, +91 each petal f41. +51 moves the engagement pins (6), [7) to the interlocking body (2),
(3) It is made to appear and retract to the rotational position. The pedal pressure sensors (8) and (9) are formed into plate shapes similar to the respective petals (41 and (51), and one end is pivotally connected with a pivot pin +291.C1Φ. 5) The beta arm part is made hollow and an interlocking member such as a rod 0υ or a ball (support) is inserted into the interior to operate the engaging pins (6) and (7) that are guided to the long hole 03 at the lower end. be.(
B) is a return spring that pushes back the engagement pins (6) and (7). This spring 04 causes the engagement pin (6).

Along with (7), the pedal pressure sensors (8) and (9) are also reset.

5 and 6, the difference from the above example is that the rod O
1l is composed of a flexible member that bends along the petal arm, and is in contact with the engagement pins f6) and (7) at the lower end.

Moreover, from the upper side of each pedal pressure sensor (81, (91), there is a petal cover 0 that covers and fits over the forward pedals (4) and (5).
9, OQ is installed to prevent foreign objects from getting caught between these forward/reverse pedals (4), (5) and tread pressure sensors (8), (91). The upper ends of the rods 0υ are connected together (Fig. 6) to form a fitting rib (5) into which the pedal pressure sensors (8) and (9) are fitted, so that they operate integrally. (to) is a wire buried in the center of the rod 0υ to prevent shrinkage.

[Brief explanation of the drawing]

The figures show an embodiment of the invention, and Fig. 1 is a slope view;
FIG. 2 is an electric circuit diagram, FIGS. 3 to 5 are perspective views showing some other embodiments, and FIG. 6 is a side sectional view of a part of FIG. 5. In the figure, the code (1) is the speed change control shaft, and (2) and (3) are the interlocking bodies. (4) is a forward petal, (5) is a backward petal, +61.
(71 is the engagement pin, (0), (9) are the pedal pressure sensors, (
F) indicates the forward side, (N) indicates the neutral position, and (R) indicates the reverse side.

Claims (1)

[Claims] 1. Move the shift control shaft (1) from the neutral position (N) to the forward side (F
) and the reverse side (R), interlocking bodies (2) and (3) interlocked to change forward and backward speeds, and this interlocking body (2),
Forward petal (4) and reverse petal (5) corresponding to (3)
Between this forward petal (4) or reverse petal (5)
A traveling pedal for a tractor or the like, which is provided with engagement pins (6) and (7) that engage with the interlocking bodies (2) and (3) and rotate integrally when depressed. 2 Forward petal (4) or reverse petal (4) that changes forward and backward speeds
By detecting the pressure when stepping on these pedals (4) and (5) on the petal surface of (5), these forward pedals (4)
Alternatively, a traveling pedal for a tractor or the like is provided with pedal pressure sensors (8) and (9) that perform gear change interlocking with a reverse pedal (5).