JPH0631851Y2 - Side float suspension system for riding agricultural machinery - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention is a side of a riding agricultural machine in which a working machine such as a planting device, a fertilizer application device, or a seeding device having a side float at the bottom is mounted on a traveling machine body so as to be vertically movable. Float suspension device.

(B) Conventional technology Conventionally, a working machine such as a planting device having a center float and a side float grounded on a rice field, a fertilizer application device, or a seeding device is mounted on a traveling vehicle so as to be able to move up and down, and the center float is used as a machine frame. The rear part is pivotally attached so that it can be tilted up and down, and the front part is connected so that it can be moved up and down with a V-shaped link, and is pivotally attached so that it can be tilted vertically. A center float suspension system for a riding agricultural machine in which the descending position is restricted is disclosed in Japanese Patent Application Laid-Open No. 59-59.
It is already known from the publication No. 159705.

(C) Problems to be solved by the invention When the center float suspension system of the known riding agricultural machine is applied to the suspension system of the side float, the side float evens the soil scratched by the wheels at the front part and at the rear part. Where the planting part to be performed, the sowing part or the fertilizing part is leveled, when the front part of the side float is raised with respect to a hard field, the soil scratched by the wheels cannot be leveled, In the rear part, a deep groove is created in the part where the float has passed, making planting, sowing or fertilization uncertain, and
When the front part of the side float was lowered in a soft field, there was a problem that the mud was extruded to the side excessively and the seedlings planted, seeds sown or fertilizers applied were washed away.

(D) Means for Solving the Problems In the present invention, a working machine having a center float at the center of the lower side of the machine body and side floats on both sides of the machine machine is mounted on a traveling machine body so that it can be moved up and down. In a riding agricultural machine in which the float is pivotally attached to the machine frame of the working machine so that the rear part can be tilted up and down, and the front part is connected to a support rod protruding sideways from the frame so as to be vertically movable via a letter-shaped link without bending and stretching, A balance stabilizing spring is provided at a fulcrum portion connecting the upper link and the lower link of the dogleg shaped link to hold the postures of the upper and lower links, and the balance stabilizing spring is attached so that the set position can be changed. The above-mentioned problems were solved by configuring the float so that it can be held in a changed posture.

(E) Action In a weak field, if the equilibrium stabilizing spring attached to the doglegged link at the front of the side float is set so that the front of the side float tends to rise, the front of the side float will become muddy. It is held in a position that does not push it deep inside, does not push out a large amount of mud to the side, and in a relatively hard field, setting the equilibrium stabilizing spring so that the front part of the side float tends to descend. , The side float pushes the soil that the wheels have raked up to some extent to level it, and even if the balance stabilization spring is set to any of the above states,
Since the side float is biased by the equilibrium stabilizing spring so as to approach the equilibrium posture, the side float conforms to the shape of the paddy field and smoothly glides over the paddy field.

[Embodiment] An embodiment of the present invention will be described with reference to the riding rice transplanter shown in the drawings. 1 is a step 2 in which an engine 3 and a steering wheel 4 are provided in the front part, and a driver seat 5 and a seat supporting the same are provided in the rear part. A machine body provided with a panel 6, and a planting device 10 is attached to the rear of the machine by an upper link 7 and lower links 8 and 8 so that the planting device 10 can be moved up and down. It consists of a transmission case 11 ..., multiple planting rods 12 ..., a center float 13 at the center lower part, a seedling stand 14 and side floats 15 and 15 at both lower parts,
The side floats 15 and 15 have a rear bracket 16 ...
Pin the planting depth adjusting lever 17 ... of the transmission case 11 ...
A bracket 20 at the front is pivotally attached at 18 and is connected to a frame 21 that is fixed to the front of the transmission case 11 ...

The doglegged link 22 has a front portion of a front portion of a lower link 25 whose rear portion is connected to the bracket 20 by a pin 20a, and a front portion of an upper link 27 whose rear portion is connected to the frame 21 by a supporting rod 26 as a fulcrum. The balance stabilizing spring 30 wound around the fulcrum pin 28 is loosely fitted in the hole 31 of the front connecting portion of the lower link 25, and the rear portion is in the middle of the upper link 27. It is loosely fitted in any one of a plurality of locking holes 32 which are formed at intervals in the vertical direction.

In the above-mentioned riding rice transplanter, when carrying out planting work in a weak field, the rear portion of the equilibrium stabilizing spring 30 is provided with an upper engaging hole 32.
When loosely fitted, the crossing angle of the V-shaped link 22 becomes smaller and the front part of the side float 15 is in a posture of being slightly lifted and the equilibrium stabilizing spring maintains the equilibrium state, and when planting work is performed in a hard field. , The rear of the balance stabilizing spring 30 with the locking hole at the lower end
When it is loosely fitted in 32, the crossing angle of the V-shaped link 22 becomes large and the front part of the side float 15 maintains an equilibrium state in a posture in which it is suspended downward, and in a field of standard hardness. When the rear portion of the balance stabilizing spring 30 is loosely fitted in the middle, the front portion of the side float 15 is suspended in an intermediate posture, and the balance stabilizing spring maintains a balanced state in that posture.

Thus, in a soft field, the ground contact pressure on the front part of the side float 15 is rather small, the mud that tends to flow is not excessively pushed to the side, and the wheels scraped up in a hard field. The soil mass is pushed in more strongly than in the above case to level the soil, and the equilibrium stabilization spring 30 is used for side floats in hard fields and soft fields as well as when the field is of standard hardness.
15, 15 expand and contract depending on the buoyancy received from the paddy field, and in each case, the doglegged link 22 is biased by the balance stabilizing spring 30 so as to return to the set equilibrium state, whereby the side float 15 Slide 15 and 15 smoothly along the unevenness of the rice field.

Next, an example of adjusting the spring force of the equilibrium stabilizing spring 30 in the driving section will be described with reference to FIGS.
Reference numeral 13 also serves as a sensor when automatically controlling the height of the planting device 10, and this automatic control device connects an oscillating plate 35 to an arm 34 of an adjusting lever 33 whose fulcrum is point A at a link fulcrum B. Then
The lower part of the swing plate 35 is connected to the dog-legged link 39 by the connecting rod 36 and the links 37 and 38, and the upper part is connected to the control valve 41 by the rod 40. When the adjusting lever 33 is tilted up and down. The oscillating plate 35 moves back and forth, so that the front part of the center float 13 moves up and down.

Then, an inner wire for adjusting the balance stabilizing spring 30.
As shown in FIG. 6, the front portion of 42 is connected to the upper portion of the arm 34 by a pin 43, and the rear portion thereof is connected to a shaft rod 45 installed in the middle portion of the upper link 27 as shown in FIG. Yes, the front part of the outer 46 is fixed to a hydraulic lever 47 that raises and lowers the planting device and the frame 48 that supports the driver's seat 5, and the rear part is raised from one side of the upper link 27 and the upper part is folded to the other side. A restricting plate 51, which is movably fitted in a bent hole of the receiving plate 50 and is fixed to the rear end of the outer 46, has a hole in the center, and this hole is fitted into the rear end of the balance stabilizing spring 30. There is.

Therefore, when the adjustment lever 33 is tilted upward from the standard position shown in FIG. 6 to cope with a weak field, the link fulcrum B moves forward, and the front part of the center float 13 passes through the link 37 or the like. The inner wires 42, 42 (on the left and right) relax at the same time, so the outer 46, 46
The rear end of the balance stabilizer spring 30 moves upward, so that the rear end of the balance stabilizing spring 30 rises and the front parts of the side floats 15 and 15 are likely to be lifted.

Further, when the adjusting lever 33 is tilted downward with respect to a relatively hard field, the link fulcrum B moves forward and the front part of the center float 13 tends to rise, and at the same time, the inner wires 42, 42 are pulled forward. I'm nervous because I'm nervous, so outer 4
The rear end of 6,46 moves to the rear, and the regulation plate 1
5,15 lowers the rear portions of the equilibrium stabilizing springs 30,30, and the front portions of the side floats 15,15 are slightly lowered.

(G) Effect of the Invention In this invention, the working machine having the center float 13 in the center of the lower part of the machine body and the side floats 15, 15 on both sides of the machine body is mounted on the traveling machine body so as to be able to move up and down. The side float 15 is pivotally attached to the machine frame of the working machine so that the rear part can be tilted up and down, and the front part can be vertically moved via the letter-like link 22 to the support rod 26 protruding sideways from the frame without being bendable. In the connected riding agricultural machine, the upper link of the doglegged link 22.
A balance stabilizing spring is provided at the fulcrum part connecting 27 and the lower link 25.
Hold the posture of the upper and lower links 27, 25 by interposing 30,
Since the equilibrium stabilizing spring 30 is attached so that the set position can be changed and is held in a state where the sliding posture of the side float 15 is changed, the equilibrium stabilizing spring 30 is attached to the front part of the side float 15 against a hard field. When set so as to descend, the equilibrium stabilizing spring 30 suspends the side float 15 while maintaining equilibrium in the set state, and when the front part of the side float 15 tends to descend to a weak field, The balance stabilizing spring 30 suspends the front part of the side float 15 while maintaining the balance in the set state, and the side float 15 is eventually returned to the balance posture by the balance stabilizing spring 30 regardless of the hardness of the field. It was regulated to wake up and smoothly followed the unevenness of the field scene, and did not push mud excessively to the side when the field was soft, and the wheels scratched when the field was hard. soil The lump can be leveled reliably, and the rear part of the side float 15 bites into the rice field,
It does not form a deep gliding groove.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a side view of a planting device, Fig. 2 is a perspective view of a main part, Fig. 3 is a side view of a riding rice transplanter, and Fig. 4 is a perspective view. Is a side view of the work equipment lifting device,
FIG. 5 is a side view of a main part in another embodiment, and FIG. 6 is a side view of an operation lever part. 13 …… Center float, 15 …… Side float, 22…
… V-shaped link, 25 …… Lower link, 27 …… Upper link, 30 …… Balance stabilizing spring

Claims (1)

[Scope of utility model registration request] 1. A center float 13 is provided in the center below the fuselage,
Further, a working machine having side floats 15, 15 arranged on both sides thereof is mounted on the traveling machine body so as to be able to move up and down, and the side float 15 is pivotally attached to the machine frame of the working machine so that the rear part can be tilted up and down, and the front part. Is a riding agricultural machine connected to a support rod 26 protruding laterally from the frame so as to be vertically movable via a letter-shaped link 22 without bending and stretching, and connects an upper link 27 and a lower link 25 of the dogleg shaped link 22. The balance stabilizing spring 30 is installed at the fulcrum to maintain the postures of the upper and lower links 27 and 25, and the balance stabilizing spring 30 is mounted so that the set position can be changed.
A side float suspension device for a riding agricultural machine, characterized in that it is configured to hold 15 sliding postures in a changed state.