JPS589847B2 - Foot operated device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foot-operated operating device, and an object of the present invention is to simplify the operation.

Tractors equipped with a hydraulic clutch, etc. in the drive system separate from the main clutch are effective for pasture work, but in the past, the switching valve for this hydraulic clutch was located below the front of the driver's seat and mounted on the transmission case. Since the switching lever is manually operated, operation during work is extremely complicated.

In other words, when working on grass with a hay baler attached to the rear of the tractor body, the driver often works diagonally to the rear while looking at the rear right. I had to change my position.

The present invention solves the problems of the conventional art, and is characterized by the provision of an operating pedal that is linked to an operated member such as a hydraulic clutch switching valve, and the provision of a member that is linked to this operating pedal. an engaging portion is provided on the fixed side, and an engaged portion with which the engaging portion engages is provided on the fixed side so that the operating pedal is located at the depressed position when the operating pedal is first depressed. The present invention is characterized in that means is provided for operating the member relative to the engaged part so that the engaging part is disengaged from the engaged part and returned to the standby position when the second depression is made.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the figure, reference numeral 1 denotes a transmission case that constitutes a part of the tractor body. Inside this case, as shown in FIG. etc., and a hydraulic clutch 6 is interposed in the driving system transmission 4.

7 is a step; 8 is a clutch pedal for operating the main clutch 3, which is supported by a brake pedal shaft 9;
It is interlocked with the main clutch 3 via the clutch rod 10, clutch lever 11, clutch lever shaft 12, etc., and the main clutch 3 is disengaged when the clutch lever is depressed.

Reference numeral 13 denotes a switching valve for controlling the hydraulic clutch 6, which is mounted on the transmission case 1 at the lower front of the driver's seat (not shown).

The switching valve 13 has a switching lever 15 that rotates around a switching lever shaft 14. When the switching lever 15 is rotated to the stopper 16 contact position, the switching valve 13 is activated and the hydraulic clutch 6 is disengaged.

17 is an operation pedal for operating the switching valve 13;
As shown in the figure, it is fixed to the inner end of a pedal shaft 18 that is rotatably inserted and supported at the rear end of the step 7, and the pedal shaft 18 has an interlocking lever 19 that protrudes rearward and a lower Operating levers 20 protruding from each other are integrally fixed.

A connecting rod 21 inserted and supported by the switching lever 15 is connected to the interlocking lever 19, and a coil spring 22 is fitted onto the upper end of the connecting rod 21. Therefore, the operation pedal 17 is moved by the elastic deformation of the coil spring 22. , it is possible to perform a depression operation from the first step depression position 1 to the second step depression position ■ shown in FIG.

Reference numeral 23 denotes a locking/releasing mechanism for the operating pedal 17, which is connected to the step 7 via a lock lever 25 pivotally attached to the lower end of the operating lever 20 by a support shaft 24 and a return spring latching piece 26.
A locking piece 27 fixed to the locking piece 27, a locking pin 28 fixed to the tip of the locking lever 25 to be engaged with and disengaging from the locking piece 27, and a tension spring 29 urging the locking lever 25 upward.
It consists of a holding cylinder 30 and a stopper 32 supported by a coil spring 31 to elastically support the lock lever 25 downward, and locks the operation pedal 17 at the first step depression position (■) and releases it when the second step depression position (■) is reached. It is configured as follows.

In the above configuration, the solid lines in FIGS. 1 and 2 indicate the state of each part when the hydraulic clutch 6 is connected, and when the hydraulic clutch 6 is to be disconnected from this state, the operation is as follows.

First, the user places his or her foot on the operating pedal 17 located at the rear end of the step 7, and depresses the operating pedal 17 to the first step depression position I.

Then, the interlocking lever 19 and the operating lever 20 are moved integrally via the pedal shaft 18 to the virtual line position Ia in FIG.
Rotating in the direction of the arrow, the interlocking lever 19, the connecting rod 21,
The switching lever 15 rotates in the direction of arrow b around the switching lever shaft 14 via the coil spring 22, and the switching valve 13 is activated.
The hydraulic clutch 6 is disengaged.

At this time, the switching lever 15 comes into contact with the stopper 16.

On the other hand, when the operating lever 20 rotates to the imaginary line position Ia,
The lock lever 25 moves forward in the direction of arrow C, and since the lock lever 25 is supported by the support shaft 24 and the tension spring 29, the lock pin 28 at the tip comes into contact with the lower surface of the locking piece 27 and slides. After that, it engages with the locking piece 27 and locks the operation pedal 17 in the first step depression position (3).

Therefore, the switching valve 13 remains in the activated state, and the hydraulic clutch 6 is maintained in the disconnected state.

Next, when the operating pedal 17 is further depressed from the first depression position I, the switching lever 15 is in contact with the stopper 16, so the coil spring 22 is compressed and elastically deformed, and the operating pedal 17 is moved to the second Rotate to step-in position ■.

At this time, the operating lever 20 also rotates in the same direction to the imaginary line position IIa, and the lock lever 25 moves forward.
After the lock pin 28 reaches the front end of the locking piece 27, it is difficult to escape upward. Therefore, when the pedal force on the operating pedal 17 is released next, the lock pin 28 is moved from the locking piece under the action of the stopper 32 and the tension spring 29. While sliding on the upper surface of the lock lever 27 in the direction of the arrow a, the lock lever 25 returns to the solid line position, and the hydraulic clutch 6 is reconnected.

When the hydraulic clutch 6 is operated with the foot in this manner, the driver does not need to change his posture, making driving very easy.

The lock/release mechanism 23 can also be configured as shown in FIGS. 4 and 5.

That is, this lock/release mechanism 23 is mounted on a fixed shaft 34 by a mounting bracket 33 on the same axis opposite to the pedal shaft 18.
A movable cylindrical body 36 having an engagement pin 35 is fitted onto the fixed shaft 34 so as to be slidable in the axial direction via the roll bin 37, a long hole 38, etc., and the movable cylindrical body 36 is attached to the pedal shaft. A spring 39 is provided to bias the pedal shaft 18 toward the pedal shaft 18.
A cylindrical body 40 is fixedly installed on the side so as to fit onto the movable cylindrical body 36, and a cam groove 43 having first and second engaging parts 41 and 42 is formed on the inner surface of this cylindrical body 40. In this structure, when the engagement pin 35 is engaged with the first engagement portion 41, the operating pedal 11 is in the clutch connection position, and when the operating pedal 17 is depressed to the first step, the engagement pin 35 is in the second engagement position. When it engages with the engaging portion 42 and depresses the second step, it returns to its initial state.

In each of the above embodiments, the lock lever 25 and the cylinder body 40 act as a member interlocked with the operating pedal 17, the lock pin 28 and the second engaging part 42 act as an engaging part, and the locking piece 27 and the engaging pin 35 act as an engaged member. They each form a joint.

As described above, in the present invention, an operating pedal is provided that is interlocked with an operated member, and an engaging portion is provided on the member that is interlocked with the operating pedal, so that when the operating pedal is depressed for the first time, the operating pedal is in the depressed position. An engaged portion with which the engaging portion engages is provided on the fixed side at the position where the engaging portion is located, and the engaging portion is disengaged from the engaged portion and returns to a standby position when the operating pedal is depressed for a second time. Since the means for operating the member relative to the engaged part is provided, the first depression of the operating pedal locks the operating pedal in the depressed position, and the second depression releases the lock. This greatly facilitates operation when it is necessary to keep the member in working condition.

Therefore, if used in a hydraulic clutch or the like installed in the traveling system of a tractor, the complexity of operation can be eliminated, which is particularly effective, and work efficiency can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing one embodiment of the present invention, and FIG.
3 is an enlarged view of the main parts, FIG. 4 is a sectional view showing another embodiment, and FIG. 5 is an explanatory diagram of the same operation. 6...Hydraulic clutch, 13...Switching valve, 15...
Switching lever, 1? ... Operating pedal, 20... Operating lever, 23... Lock/release mechanism, 25... Lock lever, 27... Engagement piece, 28... Lock pin.

Claims (1)

[Claims] 1. An operating pedal is provided that is linked to an operated member such as a hydraulic clutch switching valve, and an engaging portion is provided to the member that is linked to the operating pedal, so that when the operating pedal is depressed for the first time, the operating pedal is in the depressed position. an engaged portion with which the engaging portion engages is provided on the fixed side so that the second
A foot-operated operation characterized by providing means for operating the member relative to the engaged part so that the engaging part disengages from the engaged part and returns to a standby position when the pedal is depressed. Device.