JPS5941926Y2 - power tiller - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a power tiller.

In other words, when the machine turns on the headland side during field work, if the connection below the pivot point between the machine and the rotary work equipment is released, the handle becomes heavy. It is possible to levitate the rotary and turn it easily without lifting it, and in this state, the rotary clutch can be operated to disengage from the rotary work equipment side, and the rotary can be operated to safely turn while stopping the rotary. It provides tillers.

Next, the embodiment shown in the drawings will be described.

Figure 1 shows a side view of the entire power tiller, A is this machine, with running wheels 2 mounted on both sides of the bottom of the mission case 1,
An engine E is mounted on the front part, and a handle 3 extends from the upper part of the mission case 1 to the rear of the fuselage.

B is a rotary working machine, in which a rotary R consisting of tilling claws is mounted on both sides of the lower part of the rotary case 4 in a down-cut manner, and extends from a support frame 5 fixed at the upper rear part of the rotary case 4. A tail wheel 7 at the rear of the rotor IJ-R is supported by a support rod 6, and the tail wheel 7 is configured to be vertically adjustable by an upper adjustment handle 8.

Further, on both sides of the upper part 4aK of the rotary case 4, shaft cylinders 9 and 9' are protruded on the same axis, and the input shaft 10 installed in the upper part 4a is extended outward from one shaft cylinder 9'. Transmission case 1 extended from the transmission case 1 side
1 to transmit power to the input shaft 10, and the upper part 4
In a, transmission is transmitted from the input shaft 10 to the sprocket 12 via gears 12 and 12', and the sprocket 12
The rotary B is configured to be driven by a chain 13 that runs around the rotary B.

Reference numeral 14 denotes an engagement plate formed by bending a plate into a U-shape, and the end portions of both side plates 14a, 14a of the engagement plate 14 are rotatably fitted into both shaft cylinders 9, 9' to form a snap ring. 15 prevents it from coming off, and the upper surface part 14b of the engagement plate 14 is attached to the upper part 4a.
Both side plates 14a are placed so that the casing is placed above the casing.

Engagement grooves 16, 16 are formed on the distal end side of the upper part 4a to form a circle around the center of the cylinder shafts 9, 9', respectively, with one side open. 1
A tension spring 19 that can be pulled beyond the dead center is connected to the pin 18 extending from 4a.

At the rear of the mission case 1, which is the rear of the machine A, a hit part 20 consisting of both parallel plates 20a and 20a is provided protrudingly, and both plates 20a and 20a are fixed to the outer surface at the rear of the upper end. Support plate 21a.

21aK is provided with support portions 21, 21 each having a semicircular cutout that opens rearward, and the engagement groove 16 is provided in a portion of the drawing board body 20a, 20a in front of the support portion 21.
．． Locking bodies 22.22 made of bottles that can be engaged with 16, respectively.
is fixedly installed, and the shaft cylinders 9, 9 are attached to the support portion 21.21 from the rear.
When fitted, the rotary working machine A is configured to be able to rotate using the shaft cylinders 9, 9 as a fulcrum O.

A connecting portion C is installed below the fulcrum O.
3 and 23 are protruded from each other, and parallel compatible retainers 23a and 23a are also protruded inwardly between them. When inserted, a crescent-shaped engagement portion 26 is formed in the center of the support shaft 25 and is biased to one side with respect to the cross section of the support shaft 25.
Supports 23.23a, 23a that hang in front of the support shaft 25
A support pin 27 is inserted into the portion of the holder 23a.

An actuating plate 28 is inserted into the support pin 27 between 23a,
Both ends of the spring 25 fitted to the support pin 27 are engaged with the supports 23, 23 and the lower surface of the actuating plate 28, and the elastic force of the spring 29 causes the actuating plate 28 to rotate clockwise on the left side. is energized, and actuating plate 2
A curved engagement line part 30 that can be engaged with the engagement part 26 is formed on one side of the actuating plate 8, and a cutout engagement part 31 that can be engaged with the pin 30 is formed on the front side of the actuating plate 28. do.

Further, in the connecting portion CK, a connecting rod 32 having an inflection shape is extended forward from the rotary case 4 below the fulcrum 0, and the pin 30 is fixed to the tip of the connecting rod 32, and the pin 30 is fixed to the tip of the connecting rod 32. One end of an arm 33 is fixed to the end of the support shaft 25 that protrudes laterally, and a pin 34 is fixed to the tip of the arm 33.
A tension spring 35 capable of moving beyond the dead center is connected to a pin 36 protruding from the support metal 23, and a tension spring 38 is connected to a pin 37 fixed to the front side of the hit part 20 and the pin 34. do.

The base of a lever 41 that can be rotated around a pin 10 is attached to the side of the support rod 6 facing the rear of the rotary work machine B, and the lever 41 is extended rearward so that the operator can use his/her foot to move it downwards and downwards. The lever 4 is provided so that it can be stepped on.
The tip of a rod 42 extending from the base 41a of the arm 33 is rotatably connected to the tip of the arm 33 via a pin 43.

A rotary clutch operating lever 44 is attached to a support shaft 45 on the side of the transmission case 1 on the front side of the fulcrum 0.
It is mounted so that it can rotate about the center, and a pawl clutch type rotary clutch that is disposed inside the transmission case 1 can be activated by the rotation of the support shaft 450 as the lever 44 rotates, thereby supporting the rear Vci of the fulcrum O. Connect the mounting bracket 46 of the rod 5 and the tip of the lever 44 with a spring wire 47.
A tension spring 50 is connected between the pin 48 on the tip side of the lever 44 and the pin 49 on the side of the transmission case 1, allowing the rotary work machine B to move beyond the dead center. When the left side surface rotates clockwise, the lever 44 is rotated counterclockwise via the spring wire 47 to disengage the rotary clutch.

Reference numeral 51 denotes a main clutch operating arm, which is structured to operate the clutch of the input transmission section which is above the transmission of the rotary clutch and above the travel transmission, and is an interlocking arm connected to the main clutch lever 52 provided near the handle 3. The rod 53 and the operating arm 51 are connected by a rod 54, and the tip of the operating arm 51 and the interlocking rod 53 are connected by a spring wire 55. The spring wire 55 is connected to a pin body 56 provided at one end of the lever 44. The arrangement is such that a stop bar 57 inserted through and fixed to the spring wire 55 comes into contact with the pin body 56.

In the power tiller having the above structure, as shown in Fig. 1, when the connecting part C is in the connected state and plowing work is performed, the center of gravity G of the machine body is slightly behind the upper part of the axle 2', and the second As shown in the figure, when the rotor IJ-B rises above the soil surface 58, the front part of the machine is slightly tilted forward and the center of gravity G is moved slightly forward above the axle 2'.

Therefore, when attaching the rotary work machine B to the machine A, as shown in FIG.
The shaft cylinders 9, 9' are attached to the support parts 21, 211 above the hit part 20.
/c Push it in as shown by arrow A, and as shown in FIG. 6, rotate the engagement plate 14 about the shaft cylinders 9, 9' in the direction of the arrow to move the tension spring 19 beyond its dead center.
A state in which the engagement grooves 16, 16 engage with the locking bodies 22.22 from above, and the shaft cylinders 9, 9' do not come off from the hitch part 20, and the rotary work machine R can rotate around the fulcrum O. It can be attached to the holder and can be removed by reversing the operation.

Further, when the actuating plate 28 is rotated in the direction of the arrow with respect to the spring 29 and the pin 30 is advanced in the two directions of the arrow while being rotated about the fulcrum O, the pin 30 is rotated in the direction indicated by the arrow.
When the connecting portion C is engaged with the notch engaging portion 31, the connecting portion C is brought into a connected state, and the rotary work machine B can be connected as shown in FIG.

In this state, as shown in FIG. 10a, the engaging portion 26 of the support shaft 25 engages with the engaging edge 39 of the actuating plate 28 to perform locking, and the connecting portion C enters the locked state.

Therefore, as shown in Figure 1, plowing work is carried out in the same position as in the past, but when turning the machine when it reaches the headland of the field, the operator who operates from the rear of the machine while taking a picture of the handle 3 holds it with his feet. Push lever 4 as shown by arrow H.
4 is pushed down, the rod 42 is pulled in the direction of the arrow while the arm 33 resists the tension spring 38 and pulls the tension spring 36 past its dead center in both directions, and as the arm 33 rotates, the support shaft 25 engages. The portion 26 rotates in the direction of the arrow G and becomes separated from the engagement edge 39 of the actuating plate 28, and the connection portion C can be disconnected.

When the connecting part C is disconnected, the rotary R rotates in the direction of the arrow C in a down-cut manner, so the force that hits the soil downward applies a force in the floating direction, and it remains
The rotary R floats above the soil surface 45 and the tail wheel 7 rises above the soil surface 45.
, the position of the fulcrum O is pushed up due to the rotation of the fulcrum O and the disconnection of the connecting part C, and
As shown in FIG. 11, the connecting rod 32 is pushed in the direction of the arrow, and the pin 30 moves in the same direction, coming out of the engaging portion 31 of the actuating plate 2B and moving forward as shown in FIG. Along with this, the actuating plate 28 is rotated about the support pin 27 in the direction of arrow N by the spring 29, and the tip of the actuating plate 28 becomes engaged with the slightly rotated retaining portion 26.

Furthermore, when the rotary R is in a floating state, the mounting bracket 46 also rotates around the fulcrum O and pulls the spring wire 47 backward to rotate the lever 44 in the direction of the arrow R as shown in FIG. At this point, the rotary clutch is disengaged and rotary R stops, and the main clutch is engaged and the aircraft turns.

In this state, the center of gravity G of the aircraft moves from the rear to the upper side of the axle 2' as shown in Fig. 2, so the operator holding the steering wheel 3 can steer without putting any strain on his/her grip. be able to.

When the machine has turned and is in the position to start plowing again, when the handle 3 is pushed down, the position of the fulcrum O is pushed down and the connecting rod 32 is moved in the reverse arrow direction, that is, backward. The pin 30 engages with the engaging portion 31 of the actuating plate 28, which is in the position shown in FIG. At the point where the pin 30 moves in the position shown in FIG. 10a, the tension spring 38°38
The engaging portion 26 rotated by the engaging edge 39 engages with the engaging edge 39, and the connecting portion C (returns to the locked state).

At this time, when the main clutch lever 52 is rotated in the direction of arrow O and operated to disengage the main clutch as shown in FIG. The lever 44 in this state is rotated, the tension spring 50 passes over the dead center, and the lever 44 is supported in rotation, and the rotary clutch is operated to engage.

Then, when the main clutch lever 52 is operated again to engage the clutch, the rotary R rotates as the machine moves forward, allowing plowing work to be performed.

In this way, the present invention is such that the front upper part of the rotary work machine is rotatably connected to the rear of the machine that has running wheels, and the rotary work machine is connected to the machine side by drawing below the fulcrum. The machine side is connected so that it can be disconnected by a connecting part, and the rotary clutch is connected to the machine side by a wire extending from the work machine side so that the lever for operating the rotary clutch can be operated. Therefore, when the button is pressed for field work and the machine turns on the headland side, if you release the connection below the rotation fulcrum between the machine and the rotary work machine... You can float the rotary and turn it easily and easily without having to lift it up like before, and in this state, the rotary rotates around the fulcrum and the rotary clutch can be operated in conjunction with the work machine side to stop the rotary. It has the feature that it can be turned safely in a certain position.

[Brief explanation of the drawing]

The drawings show an embodiment, and Fig. 1 is a side view of the power tiller body, Fig. 2 is an explanatory diagram of its operation, Fig. 3 is an enlarged view of a part of Fig. 1, and Fig. 4 is an enlarged view of Fig. 3. Some enlarged views, Figure 5 is 4th
1 and 7 are explanatory diagrams of the operation of FIG. 4, FIG. 8 is an enlarged view of a portion of FIG. 3, FIG. 9 is a sectional view of the connecting part, and FIG. Figure a(/'i) A side sectional view of a part of the connecting part, Figure 10 shows a part of it,
Fig. 2 is an explanatory diagram of the operation of Fig. 10a, Fig. 13 is an enlarged view of a part of Fig. 3, Fig. 14 is an enlarged view of a part of Fig. 13,
5 and 16 are explanatory diagrams of the operation of FIG. 13. 2... Running wheel, 44... Lever, 47
...Wire, A...This machine, B...
...Rotary work machine, C...Connection part, O.
·····fulcrum.

Claims (1)

[Scope of utility model registration request] The front upper part of the rotary work machine is attached to the rear of the machine that has running wheels so that it can rotate freely around a fulcrum, and a button is attached below the fulcrum to connect the machine side and the rotary work machine side. At the same time, the rotary clutch is connected so that it can be disconnected and disconnected, and the rotary clutch is connected so that the lever for operating the rotary clutch can be operated by rotating a lever provided above the rear of the transmission using a wire extending from the rotary work machine side. A power tiller.