JPS6312811B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rice transplanter equipped with a prime mover, a power transmission device for transmitting rotational power from the prime mover to operating parts such as traveling wheels, and a hydraulic device driven by the prime mover. Regarding machines.

Since rice transplanters are used in weak fields, it is extremely important to maintain a good balance in the front, back, left, and right directions. This invention improves the balance of the body of a rice transplanter, and also simplifies the structure for attaching other members to the lever for operating the hydraulic valve of the hydraulic system, resulting in an overall compact structure. This is the purpose and will be explained below.

The rice transplanter according to the present invention has a gearbox containing a built-in power transmission device disposed on a side surface of the prime mover, and an oil tank for the hydraulic system disposed on the side surface opposite to the gearbox. It features a lever for operating the hydraulic valve located on the outside of the oil tank. Embodiments of the present invention shown in the drawings will be described below.

FIG. 1 is a side view of a rice transplanter according to the present invention, and FIG. 2 is a partially omitted plan view. A gearbox 3 that protrudes to the rear of the prime mover is attached to the section. Further, an oil tank 5 integrated with a hydraulic pump for operating a hydraulic cylinder 4 is attached to the side surface of the gearbox 3 on the side opposite to the prime mover. That is, the prime mover 2 and the oil tank 5 are respectively attached to both side surfaces of the gearbox 3 so as to sandwich the gearbox. in this case,
The cooling air for the prime mover 2 is discharged from the prime mover 2 toward the oil tank 5, as shown by arrow A in the figure.

At the rear of the gearbox 3 constituting the fuselage 1, a chain case 6 serving as a rotating arm is pivotally supported by a shaft 6a, and a running wheel 7 is attached to the rear end of the chain case 6. The chain case 6 and the running wheels 7 are provided in pairs on the left and right sides of the body 1, respectively.
Rotational driving force is transmitted from the prime mover 2 to the running wheels 7, 7' via a power transmission device housed in the gearbox 3 and a chain in the chain case 6. An arm 8 is attached to the front end of the chain case 6.
is provided, and the front end of a rod 9 is pivotally connected to this arm 8. The rear end of rod 9 is the balance rod 10
A piston 11 of a hydraulic cylinder 4 is connected to the balance rod 10.

At the rear of the body 1, a heavy planting device 1a, which is a working machine, is provided. The planting device 1a is
A seedling tank 25 is provided so as to be able to reciprocate from side to side along the control handle 26 through engagement between a lead cam shaft 51 and a lead metal 52, and a seedling tank 25 that swings up and down and is placed on the seedling tank 25. It is equipped with a planting rod 22 that divides and takes out the seeds and plants them in the field. The rotational driving force transmitted from the power transmission device in the gearbox 3 to the work machine output shaft 15 is transmitted to the horizontal drive shaft 14 housed in the planting part transmission case 12, and the drive shaft 1
4 to a drive device for the planting rod 22, a lead cam shaft 51 for driving the seedling tank 25, etc., via a chain housed in a transmission case 13 provided at both ends of the planting section transmission case 12. can be conveyed to. This allows seedlings to be planted in the field.

A pair of floats 28 are installed on both the left and right sides of the fuselage 1.
28' is provided. The floats 28, 28' have their rear parts pivoted A to the rear machine frame 13a of the rice transplanter, and their front ends connected to a connecting member 35. The connecting member 35 is disposed to pass left and right through a space 33 formed between the rear end of the prime mover 2 and the lower end of the gearbox 3.
The floats 28, 2 on both the left and right sides of the aircraft
8' are connected to each other. The central part of the connecting member 35 is connected to a hydraulic valve 44 via an interlocking frame 38, a vertical rod 41, a rotating piece 42, and a horizontal rod 43, and as the ground pressure increases, the float 28,
When the front part of 28' rises with respect to the aircraft body, the lever 44a of the hydraulic valve 44 is rotated and hydraulic pressure is supplied to the hydraulic cylinder 4, and the piston 11 is extended and the traveling wheels 7 on both sides are rotated. , 7' are lowered. On the other hand, when the ground pressure of the floats 28, 28' decreases as the plowing platform becomes shallower, the hydraulic valve is switched in the opposite direction to reduce the pressure of the floats 28, 28'.
is raised. This allows for appropriate planting in response to changes in the depth of the tiller. Note that a fuel tank 47 and a balance weight 37 are provided at the front of the aircraft body 1.

Next, to explain the power transmission device, FIG. 3 is a sectional view of the power transmission device showing the meshing state during reverse movement, and FIG. is transmitted from a gear 62 provided at the tip thereof to a large gear 64 provided on the hydraulic pump drive shaft 63, causing the hydraulic pump drive shaft 63 to rotate. The hydraulic pump drive shaft 63 passes through the oil tank 5 and is connected to a hydraulic pump (gear pump) 5a provided at the end of the oil tank.
The hydraulic pressure generated by its rotation is guided to the hydraulic cylinder 4 via the hydraulic valve 44. In addition, the hydraulic pump drive shaft 6
The rotational power transmitted to the change shaft 66 is transmitted to the fixed gear 60 provided on the change shaft 66 via a small gear 65 provided integrally with the gear 64.
Rotate 6. The change shaft 66 is provided with a change gear 67 that rotates together with the change shaft 66 but is fitted so as to be slidable in the axial direction.
In the forward position, it directly meshes with the working machine transmission gear 68 and the traveling transmission gear 69, but in the reverse position, it meshes only with the traveling transmission gear 69 via the counter gear 83, as shown. This change gear 67 can be moved by a shifter 70.

The work equipment transmission gear 68 is fitted onto the work equipment drive shaft 71 and transmits the rotational power of the change gear 67 to the work equipment drive shaft 71, but this rotational power is transmitted to the above-mentioned rotary power via the bevel gears 72 and 73. It is transmitted to the work machine output shaft 15. The traveling transmission gear 69 is loosely fitted to the work machine drive shaft 71 and rotates freely around the work machine drive shaft 71, but when the main clutch 75 is engaged, the main The rotational power from the change gear 67 is transmitted to a transmission gear 76 which is formed integrally with the clutch 75 and is similarly loosely fitted to the working machine drive shaft 71. The main clutch 75 is formed as a pin clutch, and normally, a plurality of pins 75a provided at the tip are pressed by a spring 77, and a plurality of pins 75a provided at the tip end are pressed by a spring 77, and a plurality of pins 75a provided at the tip end are pressed by a spring 77. Fits into the fitting hole 69a, and both gears 69, 7
However, by operating the shifter 78, the pin 75a can be pulled out from the fitting hole 69a and the connection between the two can be severed.

The transmission gear 76 includes both side clutch gears 80, 8 which are slidably fitted to the drive shafts 79, 79' for the left and right running wheels 7, 7', respectively.
0' are engaged at the same time. As a result, the rotational power transmitted via the main clutch 75 is simultaneously transmitted to the traveling drive shafts 79, 79' on both sides, thereby rotating the traveling wheels 7, 7' on both sides. Note that the above-mentioned both side clutch gears 80, 80' are connected to springs 82,
82', the transmission gear 76 is always urged to mesh with the transmission gear 76, but by operating the shifters 81, 81' of the side clutches attached to each side clutch gear, the connection between one of the side clutch gears and the transmission gear 76 can be made. By cutting off the connection, it is also possible to stop driving either the left or right running wheel.

This rice transplanter has a compact structure in which the gearbox 3 containing the power transmission device is directly connected to the side of the prime mover 2, as described above, so that the prime mover 2 is oriented laterally from the center line of the body of the rice transplanter. Although they are disposed at different positions, the heavy oil tank 5 is disposed on the opposite side of the gearbox, so that the balance between the left and right sides is favorable. Conventionally, this oil tank 5 was placed at the rear of the prime mover, or the gearbox 3 was also used as an oil tank, but since it is placed in parallel with the prime mover in this way, the balance between the front and rear of the rice transplanter is improved. It has also become desirable for taking.
In addition, by doing this, the oil tank, hydraulic pump, hydraulic valve, etc. can be arranged all together in one place, which makes it possible to reduce the number of necessary parts, and also makes it possible to Since the lever is located outside the oil tank, the interlocking structure with the float is simple, and it is possible to quickly respond to signals from the float regarding changes in ground pressure.

In addition, if the cooling air of the prime mover (engine) is discharged from the engine toward the oil tank as shown in the example shown in the figure, the hydraulic oil will be cooled by this cooling air, so the oil temperature will increase as the oil temperature rises. This is advantageous because accidents such as leakage can be prevented and normal operating conditions can be maintained. Also,
By doing so, in cold regions, the hydraulic oil is conversely warmed by the warmed cooling air from the engine at the start of operation, which has the advantage of lightening the load on the engine.

As is clear from the above explanation, in the rice transplanter according to the present invention, the prime mover, gearbox, and oil tank are arranged in parallel laterally in order, making it possible to maintain a good balance of the machine body. Since the operating lever of the hydraulic valve is located outside the hydraulic tank, the structure for attaching other parts to the operating lever can be simplified, resulting in a compact and superior structure. It became.

[Brief explanation of the drawing]

Figure 1 is a side view of a rice transplanter to which the present invention is applied;
The figure is a partially omitted plan view, FIG. 3 is a sectional view of the power transmission device, and FIG. 4 is a longitudinal sectional view of the oil tank. All figures represent examples. 2... Prime mover, 3... Gearbox, 4... Hydraulic cylinder, 5... Oil tank, 5a... Hydraulic pump, 6... Chain case, 7, 7'... Traveling wheels, 12... Planting part honey Shion case, 13...
Transmission case, 22...planting rod, 25...seedling tank, 28, 28'...float, 35...connecting member, 44...hydraulic valve.

Claims (1)

[Scope of Claims] 1. A rice transplanter equipped with a prime mover, a power transmission device that transmits rotational power from the prime mover to operating parts such as traveling wheels, and a hydraulic device driven by the prime mover, which incorporates the power transmission device. A gearbox is provided on the side of the prime mover, and an oil tank for the hydraulic system is provided on the side opposite to the gearbox, and a lever for operating the hydraulic valve is provided on the outside of the oil tank. A rice transplanter characterized by being positioned. 2. The rice transplanter according to claim 1, wherein cooling air for cooling the prime mover is discharged from the prime mover toward the oil tank installation part.