JPS6342482B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a planting device that divides and plants seedlings from a seedling tank, a power device including a prime mover, running wheels that touch the plowing surface of a field to drive the machine, and top soil of the field. Concerning a rice transplanter equipped with a float that slides on the surface.

Generally, such rice transplanters are equipped with a hydraulic control device that moves the running wheels up and down according to the ground pressure of the float so that they can adapt to changes in plowing depth. The side floats installed on both sides of the float are used as ground pressure detection floats, and the control hydraulic system is operated based on the average ground pressure of both floats to prevent malfunctions even on slopes. It was structurally extremely difficult.

This invention provides a rice transplanter equipped with a control device that can effectively control the vertical position of the running wheels by the ground pressure of side floats provided on both sides of the machine body. This will be explained below.

The rice transplanter according to the present invention includes a planting device that divides and plants seedlings from a seedling tank, floats provided on both left and right sides of the machine body, a prime mover provided at the front of the machine, a front part connected to the prime mover, and a rear part connected to the prime mover. The aircraft is equipped with a power transmission gearbox that protrudes behind the prime mover, running wheels attached to the fuselage via a rotating arm, and a hydraulic device that moves the running wheels up and down in accordance with the ground pressure of the float. In the rice transplanter, the lower end of the gearbox is formed into a bent shape such that the rear part hangs low from the rear end of the prime mover to the rear, thereby creating a space between the rear end of the prime mover and the lower end of the gearbox. The left and right floats are connected by a connecting member passing through the space, and a switching valve for operating the hydraulic system is connected to the connecting member. Embodiments of the present invention shown in the drawings will be specifically described below.

This rice transplanter is provided with a prime mover 2 at the front end of a body 1, and connected to the prime mover 2 are a gear box 3 that projects rearward of the prime mover and a hydraulic pump 5 for operating a hydraulic cylinder 4. A chain case 6 serving as a rotating arm is pivotally supported on the body 1 by a shaft 6a, and a running wheel 7 is attached to the rear end of the chain case 6. Rotational driving force is transmitted to the running wheels 7 from the prime mover 2 via a gear train in the gear box 3 and a chain in the chain case 6. An arm 8 is provided at the front end of the chain case 6, and the front end of a rod 9 is pivotally connected to the arm 6. The rear end of the rod 9 is connected to a take-up rod 10, and a piston 11 of the hydraulic cylinder 4 is connected to the take-up rod 10.
This balance rod 10 can be freely rotated.

At the rear of the fuselage 1, there are conduction cases 13 at both ends.
A planting part planting case 12 is provided, and constitutes a planting device machine frame 1a. A drive shaft 14 is housed inside the planting part transmission case 12, and a transmission shaft 15 connected to a transmission device in the gear box 3 rotates through a bevel gear 16 and a clutch 17. Power is transmitted. The rotational power transmitted to the drive shaft 14 is transmitted to the planting rod drive shaft 20 via the chain 18, drives the planting rod 22 via the crank 21, and is further transmitted to the lead cam shaft 23 via the chain 19. and rotate it.

A seedling tank 25 is provided at the rear of the planting part transmission case 12 so as to be movable left and right along a control handle 26, and a seedling receiving frame 24 is provided at the lower end of the seedling tank 25. There is. Seedling tank 2
A lead metal 27 having an engaging claw that engages with the lead cam shaft 23 is fixed to the back side of the seedling tank 5, and the seedling tank 25 is moved from side to side as the lead cam shaft 23 rotates. The seedlings placed on the seedling tank 25 are divided and taken out by the planting rods 22 (four in the illustrated example) and planted in the field. A seedling delivery rotating body 50 is attached to the back of the seedling tank 25, and is intermittently rotated by a constantly rotating drive arm 51 to send the seedlings on the seedling tank 25 downward.

Floats 28 are provided on both left and right sides of the fuselage 1. The rear of the float 28 is the planting device frame 1
A is pivotally attached (A) to the front end thereof, and a fitting 29 is fixed to the front end thereof. The fixture 29 has a long hole 30,
The pin 31 inserted into this elongated hole 30 connects the connecting tool 3.
2 is installed. The prime mover 2 is disposed near the front end of the float 28, and a rearwardly projecting gearbox 3 is attached to the intermediate portion of the prime mover. A space 3 is formed in a bent shape such that the rear end becomes lower toward the rear from the rear end of the motor 2, and has a width in the front and back between the lower rear end surface of the motor 2 and the lower end surface of the gearbox 3.
3 is formed. A connecting member 35 passing through the space is disposed in this space. The connecting member 35 has a sleeve 36 at its center, and the connecting members 32 are pivotally attached to both ends by pins 34. The sleeve 36 of the connecting member 35 is attached to a frame 38 which is pivotally connected (B) to the balance weight 37.
It is rotatably fitted onto a support shaft 39 provided at the rear end, thereby supporting the connecting member 35 so as to be rotatable up and down. The frame 38 is
It may be pivotally connected to the prime mover 2 or an engine frame 46, which will be described later. The frame 38 has a protruding piece 40
The tip of the protruding piece 40 is connected to the first rod 4.
1 to one end of the hook-shaped rotating piece 42. Further, the opposite end of the rotating piece 42 is connected to a hydraulic valve 44 by a second rod 43. The protruding piece 40 has a large diameter notch 45 through which the connecting member 35 passes, and the connecting member 35 can freely swing inside the notch 45.

Note that in the illustrated example, a balance weight 37 is disposed below the prime mover 2, and the balance weight 37
An engine frame 46 fixed to the gearbox 3 is disposed below the gearbox 3. That is, the prime mover 2 is mounted on the engine frame 46 via the balance weight 37, but if the structure is such that the prime mover is supported via the balance weight, the vibration of the prime mover will be reduced. This is advantageous because the vibrations absorbed by the balance weights (usually made of cast iron) can reduce the vibrations transmitted to the fuselage. Incidentally, since the rear end portion of the engine frame 46 is fixed to the gearbox 3 hanging down, the support is strong.

In the above configuration, if the ground pressure of the float 28 increases due to the deepening of the plow in the field,
The front part of the float rises with respect to the fuselage, pushing up the connecting member 35 and rotating the frame 38 upward via the sleeve 36 and the support shaft 39. This movement is transmitted to the hydraulic valve 44 via the rods 41, 43 and the rotating piece 42, and the lever 44a of the hydraulic valve 44 is moved in the direction of arrow X (forward).
Rotate it. Therefore, hydraulic pressure is supplied to the hydraulic cylinder 4, the piston 11 is extended, and the balance rod 10,
The chain case 6 is rotated via the rod 9 and the arm 8, and the running wheels 7 are lowered. Conversely, when the ground pressure of the float 28 decreases as the plowing platform becomes shallower, the hydraulic valve is switched in the opposite direction and the traveling wheels 7 are raised. This makes it possible to respond well to changes in the depth of the tiller and maintain appropriate planting conditions.
In this case, the hydraulic valve is operated by moving the center part of the connecting member 35 that connects both the left and right floats, so if only one float moves up or down on a slope, etc., the hydraulic valve is switched. The running wheels are not raised or lowered. Further, since the hydraulic valve 44 and the connecting member 35 are provided relatively close to each other, the connecting structure between the two is simple.

In the rice transplanter according to the present invention, the lower end of the gearbox for power transmission is formed into a bent shape such that the rear part hangs down, and a space is formed between the rear end of the prime mover and the gearbox. A connecting member connecting both the left and right floats is disposed in the space, and the vertical movement of the connecting member operates the hydraulic valve that raises and lowers the traveling wheels. The connecting member, which plays an important role, is protected by the prime mover and gearbox, making it less susceptible to damage from external forces, and preventing muddy water from reaching the pivot point of the connecting member (the fitting part between the support shaft 39 and the sleeve 36). It is now possible to effectively prevent the adhesion of Furthermore, since the connecting member is passed through the rear side of the prime mover, there is no need to make the connecting member or the float unnecessarily long or to have a complicated structure.

[Brief explanation of the drawing]

1 and 2 are a side view and a partially omitted plan view, respectively, showing an example of a rice transplanter according to the present invention. FIG. 3, FIG. 4, and FIG. 5 are a rear view, a top view, and a side view of the main parts, respectively. DESCRIPTION OF SYMBOLS 1... Airframe, 2... Prime mover, 3... Gear box, 4... Hydraulic cylinder, 6... Chain case, 7... Running wheels, 12... Planting part transmission case, 28... Float, 33... ...Space part, 3
5... Connection member, 38... Frame, 44... Hydraulic valve.

Claims (1)

[Claims] 1. A planting device that separates and plants seedlings from a seedling tank, floats installed on both the left and right sides of the aircraft, a prime mover installed at the front of the machine, the front part is connected to the prime mover, and the rear part protrudes behind the prime mover. A rice transplanter comprising a power transmission gear box provided as shown in FIG. By forming the lower end of the gearbox into a bent shape such that the rear part hangs low from the rear end of the prime mover to the rear, a space is formed between the rear end of the prime mover and the lower end of the gearbox, and the space is A rice transplanter characterized in that both the left and right floats are connected by a connecting member passing through the body, and a switching valve for operating the hydraulic system is connected to the connecting member.