JPS6319852Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a main clutch operating device for a passenger-type towing vehicle.In detail, the main clutch can be operated to "disengage" with a pedal at the foot, and the main clutch can be operated by the way the pedal is depressed. This relates to the shape of the petal of the main clutch setting device that allows the clutch to be held in the "disengaged" state.

In conventional foot-operated pedals, the pedal's pedal surface is simply flat, or its front and rear intermediate portions protrude upward. However, if such an operating pedal is adopted in the device of this invention, the pedaling force applied to the pedal will be biased toward the direction of the tip of the foot as shown in Figure 6, and the main clutch will be operated to the "disengaged" state. It was troublesome to release the switch from the "off" state and change it to the "on" state.

Therefore, this invention aims to eliminate the above-mentioned drawbacks and takes the following technical measures.

That is, a working machine 11 such as a rice transplanter is attached to a riding-type towing vehicle body 1 on which the prime mover 3 is mounted, and the prime mover 3
A main clutch 44 is provided in the transmission system through which power is transmitted from the drive transmission system to the travel transmission system and the working machine transmission system, and the main clutch 44 is "disengaged" when the main clutch 44 is pressed into a pedal 55 provided on the step base 10 at the foot of the operator. The petal 55 is attached to the tip of an arm 56 whose base is pivotally attached to the lower part of the step stand 10 so as to be swingable depending on the depression angle.
A lock claw 60 is provided integrally with the petal 55.
A main clutch 44 is provided with a locking body 64 that allows the lock pawl 60 to be engaged and detached from the step base 10.
In the main clutch setting device for maintaining the "disengaged" state, the petal 55 is configured to have an inverted F-shaped part recessed downward between the toe part action position and the heel part action position when viewed from the side. This is what I did.

An embodiment of the present invention will be described based on the drawings. Reference numeral 1 denotes a towing vehicle body, and an engine stand 4 on which a prime mover 3 is mounted is integrally provided at the front part of a main gearbox 2. 5,5
In addition, chain cases 6, 6 are attached to both rear left and right sides of the box 2, facing rearward and downward, and rear wheels 7, 7 are attached to these. 8 is the control handle,
9 indicates the cockpit. Reference numeral 10 denotes a step stand, the back side of which is attached to the main gearbox 2 and chain cases 6, 6.

11 is a working machine, which in this embodiment is a rice transplanter. That is, a seedling tank 1 whose front side faces upward is located above a planting gear box 12 which also serves as a frame.
3, a planting rod 14 located behind the lower end surface of the seedling tank 13, and center and side leveling floats 15, 16 attached to the lower part.

Reference numeral 17 denotes a connecting link, which is composed of an upper link 18 and a lower link 19, whose base is pivotally connected to a column 20 that supports the cockpit 9, and whose end side is connected to a hitch frame 2.
1 to form a parallel link, and the front end of the rice transplanter serving as the working machine is attached to this so that it can roll freely.

22 is a hydraulic cylinder device; the cylinder 22
^a is pivotally connected to the main gear box 2, and the piston 22 ^b
is connected to the upper link of the connecting link via an arm 23.

Reference numeral 24 denotes a hydraulic switching valve, which is provided between the soil leveling float 15 in the center and the planting gear box 12, the switching valve rod is connected to the soil leveling float 15, and the front part of the float 15 is When the piston 22b moves upward, the piston ^22b protrudes, and when the piston 22b moves downward, the switching valve 24 is retracted. Incidentally, this hydraulic pressure switching valve can also be switched using a hand lever 25 near the pilot's seat.

To explain the transmission mechanism diagram in Figure 5, 26
is the input shaft, 27 is the counter shaft of the traveling transmission system A,
28 is a counter shaft of the work machine transmission system B. 2
Reference numerals 9 and 30 are change gears spline-fitted to the input shaft 26, respectively, and gear 29 is a gear 31 and 33 or 3 that is connected to each of the counter shafts 27 and 28.
2 and 34 at the same time, gear 3
0 is gear 35 or 3 fixed to counter shaft 27
6, and the gear can be changed using a change lever 37.

As shown in the figure, the front wheels 5, 5 and the rear wheels 7, 7 are transmitted from the counter shaft 27, and the work machine 1 is transmitted from the counter shaft 28.
The rice transplanter on the first side is powered by transmission.

38 is a transmission gear on the working machine side, lever 3
It is possible to switch with 9. Reference numeral 40 indicates a front wheel differential device, 41 indicates a rear wheel differential device, and 42 indicates a lead cam shaft for reciprocating and lateral movement of the seedling tank on the rice transplanter side.

An input pulley 43 is rotatably attached to the tip of the input shaft 26, and the inner surface of the pulley 43 is formed into a cylindrical shape ^43a .

44 is a main clutch, and a large number of clutch plates 45 are provided inside the cylindrical shape ^43a so as to be movable in the axial direction and are engaged with the inner surface of the cylindrical shape ^43a .
When the clutch plate 45 is pressed against the rotary plate 46, which is fixed to the clutch plate 46, the clutch is turned on, and when it is released, the clutch is turned off. 47 is a spring and clutch plate 45
is tensioned in the direction away from the rotary plate 46.

48 is a pin which is fitted into the input shaft 26,
It is fixed to an actuating plate 49 that receives the spring 47.

Reference numeral 50 denotes a clutch operating cam, which encloses the inner end side of a bearing 51 that is movably fitted to the input shaft 26, has a cam pawl ^50a on its inner end surface, and is mounted within the boss 52 of the main gear box 2. It is connected to a cam pawl ^53a provided on the outer end surface of the cam body 53, and when the lever 54, which is integrated with the clutch actuating cam 50, is rotated downward, the clutch actuating cam 50 is rotated downward.
The bearings 51 together protrude outward, and the bearing end faces push the actuating plate 49 and the clutch plates 45, 45
When the clutch is disengaged by opening the space between the two and stopping the downward rotation of the lever 54, the actuating plate 49 is returned by the spring 47, and the returning force is applied via the pin 48 to bring the clutch plate 45 into close contact. from the input pulley 43 to the input shaft 2 via the rotary plate 46 and the clutch plate 45.
Power is transmitted to 6.

55 is a petal made of iron plate, and its shape is high at the front end A where the toes are located when viewed from the side, and from this position it becomes lower towards the rear.
The shape changes completely from the appropriately lowered position (B) to a higher position, and then returns to the lower position from the appropriately upper position (C). That is, the space between the toe side working position A and the heel side working position C is recessed downward to form an inverted V-shaped part.

Reference numeral 56 designates a petal attachment arm, the base of which is pivotally attached to the side surface of the main gearbox 2 below the step base 10, and the distal end of which protrudes from a hole 57 formed in the step base 10. Then, the petal 55 is attached to the tip of the petal attachment arm 56 using the metal fitting 5.
8 so that it can be rotated by a certain amount with a lateral pin 59.

A locking claw 60 is integrally attached to the back surface of the petal 55 and has a fishhook shape when viewed from the side.

61 is an interlocking metal fitting fixed near the base of the petal attachment arm 56.

62 is a rod that connects the lever 54 of the clutch operating cam 50 and the interlocking metal fitting 61. 63 indicates a spring.

Reference numeral 64 is a locking body that is connected to the hole 5 under the step base 10.
The lock claw 60 is attached to the metal fitting 65 fixed to the front surface of the
The configuration includes a locking hole 66 that engages with the locking hole 66.

Next, the operation of the above example will be explained.

First, the rice transplanting device, which is an embodiment of the working machine 11, is put into a work starting state. That is, preparations are made by driving into a rice planting field and loading seedlings into the seedling tank 13. In this state, each part is rotated by transmission from the prime mover 3.

Then, the input pulley 43 is rotated, and the power is transmitted to the input shaft 26 via the main clutch 44 attached to the pulley 43, and the power is divided into the travel transmission system A and the work equipment transmission system B. hand,
Each working part will be driven.

Therefore, the front and rear wheels 5, 5,
7 and 7 are transmission driven, the tractor body is propelled, and the rice transplanting device is pulled while planting the seedlings.

For example, when the number of seedlings in the seedling tank 13 becomes low and it becomes necessary to replenish the seedlings,
The operator presses down on the front end A side of the petal 55, and then transfers the force to the rear end C, or alternatively, puts force on the rear end C from the beginning.
Then, the locking pawl 60 engages with the locking hole 66 of the locking body 64 as shown by the imaginary line in FIG. 3, and this state is maintained.

That is, by stepping on the pedal 55, the arm 5
6. The lever 54 of the clutch actuating cam 50 is pulled down via the interlocking metal fitting 61 and the rod 62, and the clutch is disengaged to maintain this disengaged state.

Therefore, the user can depress the rear end of the petal 55 to disengage the clutch, and then take his/her foot off the petal 55 to stop the work, allowing work such as replenishing seedlings to be carried out.

Next, when resuming work, apply force to the front end of the petal 55 and depress it, and then stop depressing the pedal to release the lock and release the main clutch 44.
is turned on, each part is transmitted, and work can begin.

In this way, when depressing the pedal 55, the main clutch 44 is maintained in the disengaged state while applying force to the front end A side, or conversely, the rear end C side, and the main clutch 44 is disengaged. The state is canceled, but at this time, the shape of the petal 55 when viewed from the side is
Because it is shaped like an inverted F, you can apply the appropriate amount of force to the front end (A) and rear end (C), allowing for extremely smooth operation.

As described above, since this invention has the above-mentioned structure, the main clutch can be engaged and disengaged with the foot pedal, and the disengaged state can be maintained. The operation and effect of holding the state and releasing the same can be performed extremely reliably and easily.

[Brief explanation of drawings]

The figure shows one embodiment of this invention.
The figure is a partially sectional side view, Figure 2 is a plan view of the main part, Figure 3 is a side sectional view of the main part, Figure 4 is a plan view of the main part of the clutch, and Figure 5 is a diagram of the transmission mechanism. , FIG. 6 is a side sectional view of the main part of the conventional device. Symbols in the figure: 1 is the towing vehicle body, 3 is the prime mover, 10 is the step base, 44 is the main clutch, 55 is the petal,
56 is an arm, 60 is a lock pawl, and 64 is a locking body.

Claims (1)

[Scope of utility model registration request] A work machine 11 such as a rice planter is attached to a riding type towing vehicle body 1 on which a prime mover 3 is mounted, and a main clutch 44 is provided in a transmission system that transmits power from the prime mover 3 to a traveling transmission system and a work machine transmission system.
1. A main clutch setting device for a riding towing vehicle, comprising: a pedal 55 provided on a step platform 10 at the steering foot section, the pedal 55 being linked to the tip of an arm 56 whose base is pivotally attached to the lower part of the step platform 10 so as to be able to swing according to the angle of depression; a locking claw 60 provided integrally with the pedal 55; and a locking body 64 provided on the step platform 10 for engaging and disengaging the locking claw 60. In this main clutch setting device for maintaining the "off" state of a main clutch 44, the pedal 55 is configured such that, in a side view, the shape of the pedal 55 is formed into an inverted U-shaped portion concave downward between the toe side operating position and the heel side operating position.