JPH0518883Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is an agricultural working machine in which a rotary tiller pulled by a tractor is equipped with a fertilizer applicator or a seeding machine. The switch device is configured to automatically open and close by utilizing the movement of the leveling plate accompanying the operation, and its purpose is to provide a switch device that eliminates the need for the operator to operate the switch on the feed motor when changing the direction of the tractor. Our goal is to provide the following.

(B) Prior Art Conventionally, a technology for automatically stopping the feeding motor when the rotary tiller is raised has been known. For example, there are techniques described in Japanese Utility Model Application Publication No. 57-125203 and Japanese Utility Model Application Publication No. 54-123316.

However, in Utility Model Application Publication No. 57-125203,
Since the lifting of the rotary tilling device is detected by the weighted rod, there are many problems with locking the weighted rod when not in use and safety devices against abnormal vibrations, making it difficult to put it into practical use.

In addition, in the technology disclosed in Japanese Utility Model Application Publication No. 54-123316, the power is extracted from the gearbox of the rotary tiller, so in order to install a fertilizer applicator or seeding machine, the design of all parts of the rotary tiller must be changed. Moreover, in order to actually transmit the movement of the leveling plate to the power transmission section, it was necessary to install a fixed wire part, etc., and a complete improvement of the rotary tiller was required. .

(c) Problems to be solved by the invention In this invention, a fertilizer applicator and a seeding machine are driven by a feeding motor, a limit switch is arranged to stop this, and the part in which the limit switch is operated by a leveling plate is leveled. The aim is to easily interlock the plates and limit switches by simply interposing a connecting rod between them.

(d) Means for Solving the Problems The problems to be solved by the present invention are as described above.Next, the configuration for solving the problems will be explained.

A rotary tilling device 5 is attached to the rear of the tractor, and a frame 7 of the rotary tilling device 5 is equipped with a
In a configuration in which the main beam 16 supporting the fertilizer application machine F and the seeding machine S is fixed, the fertilizer application machine F and the seeding machine S are
A limit switch 54 that is driven by the feeding motors 27, 37 supported on the main beam 16 and stops the driving of the feeding motors 27, 37 is provided on the main beam 16 side, an arm 61 that operates the limit switch 54, and a rotary tiller. When the rotary tilling device 5 is in the working position, the limit switch 54 is operated by the connecting rod 60 and the arm 61 as the leveling plate 12 rises. When the circuit of the feeding motors 27, 37 is closed and the rotary tilling device 5 rises and the leveling plate 12 hangs down, the limit switch 54 is operated to open the circuit of the feeding motors 27, 37.

(F) Embodiment An embodiment of the device of the present invention will be described based on the drawings.

In Fig. 1, reference numeral 1 denotes a tractor body, which is equipped with a large-diameter rear wheel 2 at the rear lower part, and has a three-point link consisting of two lower links 2 and one upper link 3 at the rear end of the body. vinegar. 5 is a rotary tilling device equipped with rotary claws 6, a lower link 4 is connected within both sides of a frame 7, and an oblique mast 9 fixed to a protrusion on the upper surface and a support 8 is connected to an upper link 3. The rotary tiller 5 is connected to the tractor body 1 via three-point links 3 and 4.

The rotary tilling device 5 has a hinge 11 attached to the rear end of a cover 10 that covers the upper half of the rotary claw 6, suspends a leveling plate 12, and connects a chain (not shown) built in a chain case 13 via a universal joint 14. It is connected to the power take-off shaft 15 of the tractor, and the rotary claw 6 is driven by the power take-off shaft to plow up the ground.After this, the leveling plate 12 advances in a slightly slanted position and levels the ground with its lower edge. go.

When changing the path of the tractor, operate the hydraulic equipment (not shown) to raise the three-point links 3 and 4, raise the rotary tilling device 5, and release the rotary claws 6 from the ground. chain line 1
As shown in 2', it hangs down almost straight and approaches the rotary claw 6.

Two main beams 16 are connected to the back of the rotary tiller 5, and tool bars T1 and T2 are attached to the top ends of vertical rods 17 and 18 rising from the front and rear ends of the main beams, respectively. Tool bars T3 and T4 are mounted on the middle part and lower end of a vertical rod 19 extending downward from the rear end.

F is the fertilizer applicator, and frame 20 is displayed on the toolbar T1.
Fix it in a cantilevered state and extend it horizontally to the front,
A horizontally long hopper 22 is attached to a support piece 21 rising from the frame 20, and a feeding box 23 is attached to the two bottom openings.
Impellers combined and housed in each feeding box (not shown)
is attached to a feeding shaft 24 that passes through its midsection, and two conduits 26 are connected to a funnel 25 that covers the bottom of the feeding box.
are branched, four conduits are attached to the front frame 7 of the rotary tiller, and fertilizer is discharged to the front side of the rotary claws 6. Reference numeral 27 designates a feed-out motor of the fertilizer applicator, which uses a direct current motor with a speed reducer and directly drives the feed-out shaft 24 of the fertilizer applicator by applying a V-belt 28 to the pulley on the motor shaft and the pulley on the feed-out shaft.

S is a unit-type seeding machine, with a frame 30 fixed to the tool bar T2 in a cantilevered state and extending horizontally to the rear side, and supporting pieces 3 rising from the frame 30.
Attach the hopper 32 to 1 and insert the feeding box 3 into the bottom opening of the hopper 32.
3 are connected, and a feeding roll (not shown) housed in a feeding box is attached to a feeding shaft 34 that passes through the midsection of the feeding roll, and a conduit 36 connected to a funnel 35 placed on the bottom of the feeding box is connected to the rear and lower part of the main beam 16. lead to.

Note that the delivery shafts 34 of several seeding machines are connected into one by a joint (not shown). Reference numeral 37 is the feeding motor of the seeding machine, which uses a DC motor with a speed reducer, and a V belt 38 is attached to the pulley on the motor shaft and the pulley on the feeding shaft.
is applied to directly drive the feed-out shaft 34 of the seeding machine. 4
0 is a double disk-shaped groove cutting device, in which two diagonal disks are freely rotatably supported at the lower end of the hanging rod 41, and the disks are rotated by the friction of contact with the soil to cut grooves in the ground. .

In this groove creator, a hanging rod 41 is connected to a square-shaped fastening metal fitting 43 via two links 42, and this metal fitting is placed over the tool bar T4 and fixed with a tightening bolt with a handle (not shown). . 44 is a seed discharge pipe;
The seeds are attached to the metal fitting 45 on the back of the suspension rod so that the lower end looks into the gap at the rear of the disk, and the conduit 36 connected to the seed dispensing box 33 is inserted into the upper opening of the discharging pipe 44, so that the seeds are dispensed from the hopper 32. Seeds are sown into the grooves cut by the furrower 40.

A pressure roller 46 is supported on a hook-shaped arm rod 47 attached to the tool bar T3, and moves behind the groove creator 40 to fill in the grooves where the seeds have been sown.

The groove maker 40 and the pressure roller 46 are attached to the feeding box 33, and these members are attached to the tool bars T2 to T4 according to the desired number of strips.

The feed-out motors 27 and 37 that directly drive the feed-out shaft 23 of the fertilizer applicator and the feed-out shaft 33 of the seeder are connected in parallel, and this parallel circuit is connected to a single cap tire cord (not shown) coming from the tractor battery (not shown). (without) and insert the main switch 49 attached to the rear wheel frame 48 into the captire cord. The fertilizer application machine F and seeding machine S described above are almost the same as known ones.

In the present invention, a fertilizer application machine F and a seeding machine S are attached to the rotary tillage device 5 pulled by such a tractor, and the respective feeding shafts 23 and 33 are connected to the feeding motor 2.
The present invention relates to a switch device in an agricultural working machine that is directly driven by 7, 37.

An embodiment of the device according to the present invention is as shown in the drawing.
1 and 51 are welded to the U-shaped metal fitting 50 from the front over the side end of the tool bar T3, and then tighten the bolts 51 and 51.
A rectangular receiving piece 52 is fitted to the metal fitting 50, and the metal fitting 50 is fixed to the tool bar T3 with a washer and a nut.A normally open limit switch 54 is attached to a seat plate 53 vertically welded to the entire surface of this metal fitting, and the lever 55 is turned on. Connect the limit switch circuit 56 to the parallel circuit of the feed motors 27 and 37 toward the bottom.

57 is a protrusion provided near the lower edge of the leveling plate 12;
A gently curved connecting rod 60 is pivotally connected to this projecting piece by a pin 58. 61 is the seat plate 53 with the pin 62
A connecting rod 60 is inserted into the through hole at the tip of the arm pivoted to the arm to make it protrude upwardly, and a snap pin 63 for preventing the rod from coming off is inserted into the small hole at the top of the connecting rod. The continuous rod 60 has several small holes 64 at its lower end, a snap pin 65 is inserted into one of them, and a coil spring 66 is wound around the continuous rod 60 between the snap pin and the arm 61.

When the rotary tilling device 5 is in the working position and the lower edge of the leveling plate 12 is on the ground and moving forward, the leveling plate 12 pushes up the arm 61 by the connecting rod 60 and the spring 66, and the arm is pushed up by the switch lever. 5
5 to close the limit switch 54, and even if the ground is uneven, the arm 61 always closes the limit switch 54 due to the spring 66, and the rotary tiller 5 is lifted and the leveling plate is moved to the chain line position 1.
2', the arm also descends to the chain line position 61', moves away from the switch lever 55, and is set to turn off the limit switch 54.

The spring 66 alleviates the swinging of the leveling plate 12 due to the unevenness of the ground, and the through hole in the arm 61 allows the connecting rod 60 to move freely to prevent the limit switch 54 from being damaged.

(f) Function of the device In this device, when the rotary tiller is raised when the tractor changes direction, the leveling plate hangs down and the arm is separated from the limit switch.
Fertilizer and seeds are not wasted.

In addition, all electric parts such as the feed motors 27 and 37 and the limit knife 54 are installed on the main beam 16 side, and on the rotary tilling device 5 side.
Electrical parts related to the fertilizer applicator F and the switch are not installed, and only the connecting rod 60 is interlocked between the two, so when the main beam 16 is installed, the parts for automatic stop can be easily connected. .

When a worker rides on a tractor and pushes the operating lever forward, a hydraulic device (both not shown) lowers the three-point links 3 and 4, the rotary tiller 5 descends and the rotary claws 6 dig into the ground, and then The tractor moves with the rear wheels 2 as driving wheels, and the rotary claws 6 are driven by the power take-off shaft 15 to plow the ground, and the leveling plate 12 moves behind it in a slightly slanted position to level the ground with its lower edge. go. At the same time, the worker turned on the main switch 49 on the fender.
is pressed to energize the feeding motors 27, 37, which rotate the feeding shafts 24, 34 respectively to feed out the fertilizer and seeds, and the fertilizer is guided to the front side of the rotary claw 6 through the conduit 26 and discharged onto the ground. The seeds are guided by the conduit 36 to the rear of the furrower 40 and sown into the furrows.

Immediately after that, the pressing roller 45 advances to fill in the grooves where the seeds have been sown. During this fertilization and seeding work, the leveling plate 12 pushes up the arm 61 with the continuous rod 60,
Even if the ground is uneven, the arm is always pushed up to close the limit switch 54.

When the tractor changes its traveling direction or runs on the road, the operating lever is pulled backward, the three-point links 3 and 4 are raised by the hydraulic equipment, the rotary tilling device 5 is raised, and the rotary claws 6 are separated from the ground. When the rotary tiller is used a little, the leveling plate 1
2 hangs down almost straight as shown by the chain line 12', and the arm also lowers to the chain line position 61' and separates from the switch lever 55, so the limit switch 54 opens and stops the feeding motors 27 and 37, and the fertilizer is removed. Automatically stops seed feeding.

When the operator lowers the rotary tiller 5 using the hydraulic equipment after the tractor has changed direction, the leveling plate touches the ground with its lower edge and assumes a slightly slanted position, and the arm 61 is moved by the connecting rod 60 and spring 66. Since the limit switch 54 is closed by pushing up, feeding of fertilizer and seeds is automatically resumed.

When changing the direction of the tractor, the operator must operate the hydraulic equipment that raises and lowers the rotary tiller 5 and the handle, so he often forgets to turn off the main switch 49 of the feed motor, which is why the operator was wasting fertilizer and seeds.

In this embodiment, when the rotary tiller is raised when the tractor changes direction, the leveling plate 12
The movement of the limit switch 54 opens and the feeding of fertilizer and seeds is automatically stopped, and when the rotary tiller is lowered, feeding of fertilizer and seeds is automatically resumed, so that the fertilizer and seeds are not discharged in vain. Also, I never forget to feed out fertilizer and seeds.

In this embodiment, an arm 61 that pushes the limit switch 54 is pivoted to the vertically oriented seat plate 53, and a continuous connecting rod 60 pivoted to the leveling plate 12 is bent and inserted into the through hole of the arm 61 to create a continuous connection. The spring 66 placed on the rod 60 is configured to push up the arm 61, and since the spring 66 relaxes the movement of the leveling plate 12 and transmits it to the arm 61, the limit switch 54 will not be damaged even if the ground is uneven.

Also, since the snap pin 65 is inserted into one of several small holes 64 made in the connecting rod 60, the strength of the spring 66 can be easily adjusted depending on the position of the leveling plate 12, that is, the amount of biting of the rotary claw 6. can.

(g) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, if the rotary tiller is raised when the tractor changes direction, the leveling plate will droop and move the arm away from the limit switch, automatically stopping fertilizer and seed delivery, resulting in unnecessary fertilizer and seed delivery. There isn't.

Second, all electrical parts such as the feed motors 27 and 37 and the limit switch 54 are mounted on the main beam 16 side, and no electrical parts related to the fertilizer applicator F or the switch are mounted on the rotary tilling device 5 side. Since only the connecting rod 60 is interlocked between the two, it is possible to easily connect the parts for automatic stopping when the main beam 16 is installed.

Thirdly, the fertilizer application machine F and the seeding machine S are placed side by side on the main beam 16, and the feeding motors 27 and 37 of both devices can be stopped at the same time by the limit switch 54, so separate limit switches are provided and the two are linked by the connecting rod 60. There was no longer any need to do so.

[Brief explanation of the drawing]

The drawing is a side view of an embodiment of the present invention and an agricultural working machine equipped with the same. 1... Tractor body, 5... Rotary tilling device, 6... Rotary claw, 10... Cover,
12... Leveling plate, 16... Main beam, F... Fertilizer, 24... Feeding shaft, 27... Feeding motor, S...
...Seeding machine, 34... Feeding shaft, 37... Feeding motor, T3... Tool bar, 53... Seat plate, 54...
...Limit switch, 60...Continuous rod, 61...
Arm, 66...spring.

Claims (1)

[Scope of utility model registration request] A rotary tilling device 5 is attached to the rear of the tractor, and a frame 7 of the rotary tilling device 5 is equipped with a
In a configuration in which the main beam 16 supporting the fertilizer application machine F and the seeding machine S is fixed, the fertilizer application machine F and the seeding machine S are
A limit switch 54 that is driven by the feeding motors 27, 37 supported on the main beam 16 and stops the driving of the feeding motors 27, 37 is provided on the main beam 16 side, an arm 61 that operates the limit switch 54, and a rotary tilling device. When the rotary tilling device 5 is in the working position, the leveling plate 12 is raised and the limit switch 54 is operated by the connecting rod 60 and the arm 61. This agricultural working machine is characterized in that when the rotary tilling device 5 rises and the leveling plate 12 hangs down, the circuit of the feeding motors 27, 37 is opened by operating the limit switch 54. switch device.