JPS6019026Y2 - Balance device for agricultural machinery - Google Patents

Description

[Detailed description of the invention] The present invention relates to a balance device for an agricultural machine.

In other words, a balance weight that follows the tilt of the aircraft and moves in the opposite direction to maintain balance is installed movably relative to the aircraft, and when the aircraft tilts, the balance weight automatically moves. This relates to a safety device that prevents the aircraft from falling by changing the position of the center of gravity from side to side or front to back.

Conventionally, this type of balance device was disclosed in Utility Model Publication No. 36-26318
No. 36-26318, which can be found in Japanese Unexamined Patent Publication No. 49-7621, uses hydraulic pressure to move weights and perform balance operations; Since the oil pump is used, the oil pump must be driven at all times, which is uneconomical as the driving energy is wasted.

Also, since the JP-A-49-7621 Dream uses a motor to move the weight, there is no waste like using hydraulic pressure, but this JP-A-49-7621
The No. 12 model requires the operation of a manual switch to return the weight that has been moved to the center, so it has the disadvantage that the manual switch must be operated each time the aircraft returns to its original horizontal position after being shifted once. Ta.

The purpose of the present invention is to eliminate the drawbacks of the conventional device as described above, and to make it possible for the weight that has been moved due to the tilting of the aircraft to automatically return to the center when the aircraft returns to the horizontal position. be.

In order to achieve this purpose, the balance device in the proposed agricultural machine includes a weight that moves in the direction of inclination according to the inclination of the machine body;
A first and second switch is provided separately at a predetermined interval in the direction of movement of the weight and is turned on when the contact closes due to the movement of the weight, and when the weight is in the center, the weight moves in either direction when turned on. A detector equipped with a third and fourth switch that turns OFF when
a balance weight that is moved in the opposite direction to the weight by a motor that is operated in FF operation and capable of forward and reverse rotation; and a fifth balance weight that is OFF when the balance weight is in the center and is ON when the balance weight moves to one side. switch and the OF when the balance weight is in the center.
A sixth switch that is turned on when the balance weight moves to the other side in F, a seventh switch that is turned on when the balance weight is in the center and turned off when it moves a predetermined distance in one direction, and a seventh switch that is turned on when the balance weight is in the center; ON when
and an eighth switch that turns off when the motor moves a predetermined distance to the other, and the first switch and the seventh switch are inserted in series in the normal rotation circuit of the motor, The fourth switch and the sixth switch are provided in parallel with the first switch and the seventh switch, respectively, in the forward rotation circuit, and the second switch and the eighth switch are inserted in series in the reverse rotation circuit of the motor, and the The third switch and the fifth switch are respectively the second switch in the reversing circuit.
It was installed in parallel with the switch and the 8th switch.

The embodiments shown in the drawings will be described below.

The one shown is a combine harvester as an agricultural machine.
The balance device is installed in the chassis at the center of the aircraft.

That is, in FIG. 1, the chassis 2 on the crawler 1 is equipped with the threshing section, sorting section, and straw removal section of the combine, as well as a part of the top sucker and the engine section, which is different from known combine harvesters. No different.

In Figure 1, 3 is a threshing section, 4 is a straw removal section, 5 is a part of the top sucker, and 6 is a driver's seat.

A support frame 10 equipped with a pulling device 7, a reaping device 8, and a conveying device 9 is attached to the front of the chassis 2, and a length adjusting device 1 is installed between the conveying device 9 and the feed chain of the threshing section 3.
There is 1.

In this case, a balance device 12 is installed in the chassis at the center of the combine harvester as described above.The specific structure of the balance device 12 is explained based on FIG. The detector 15 is connected to a weight 16 that moves in a case installed in the aircraft body (not shown) and is connected to
Movable plates 17 and 18, which the weight 16 moves in contact with, are arranged before and after the weight 16, and springs 21 and 22 are inserted between these and the fixed plates 19 and 20 to keep a predetermined interval. Separated.

The movable plate 17 and the fixed plate 19 constitute a first switch, and the movable plate 18 and the fixed plate 19 constitute a second switch.

The second movable plate, fixed plate, and spring are of course housed in the same case as 16.

A third limit switch 23 and a fourth limit switch 24 are fixed to the center of the weight 16, and these are connected to the cam 2 in the center of the case.
When it comes into contact with 5.26, it turns on and closes the electric circuit.

Next, to explain the balance operation section, 27 is a balance weight, which includes a limit switch 29' which is a fifth switch, a limit switch 29 which is a sixth switch, and a limit switch 2 which is a seventh switch.
8 and a limit switch 28', which is an eighth switch, are installed, and correspondingly cams 30, 31 and 30' are provided in a case different from the case disposed in the fuselage.

There is 31'.

Now, in FIG. 2, assuming that the wirings 40, 41, 42 form a normal rotation circuit of the motor 13, the first switch 17, 19 and the seventh switch 28 are inserted in series in this normal rotation circuit, The fourth switch 24 and the sixth switch 29 are connected to the first switch 17 by wiring 43 in the normal rotation circuit.
．． 19 and the seventh switch 28 in parallel.

Further, assuming that the wiring 44, 45, 46 forms a reversing circuit for the motor 13, the second switch 18, 20 and the eighth switch 28' are inserted in series in the reversing circuit, and the third switch 23 and the fifth switch 28' are inserted in series in the reversing circuit. The switch 29' is provided in parallel with the second switch 18, 20 and the eighth switch 28', respectively, by a wire 47 in the reversing circuit.

The balance weight 27 is movable back and forth using the case as a guide, and is driven by the motor 13.

A screw 32 is provided on the shaft 13a of the motor 13, and this is screwed into the joint 27a of the balance weight 27.
The joint 27a is spline-fitted to a fixed guide (not shown).

Now, in Figure 2, the aircraft is tilted backwards and the weight 16
moves to the right in the figure, the movable plate 17 and fixed plate 19 come into contact, the first switches 17 and 19 are turned on, and the seventh
Since the switch 28 is also ON, the motor 13 is driven in normal rotation to move the balance weight 27 to the front opposite to the rear where the aircraft is tilted, that is, to the left in the figure.

When the balance weight 27 moves a certain distance, the seventh switch 28 is disengaged from the cam 30 and turned off, so that the motor 13 stops rotating and the movement of the balance weight 27 also stops.

Next, when the body is tilted as described above and then balanced and returned to the horizontal state, the weight 16 returns to the center, and the third switch 23 of the reversing circuit contacts the cam 25 and is turned on.

At this time, the balance weight 27 is moving forward, that is, to the left, so the fifth swing 29' is also already turned on.

Therefore, when the weight 16 returns to the center, the motor 13 automatically rotates in the reverse direction to return the balance weight 27 to the center.

At this time, the fifth switch 29' is disengaged from the cam 31', and at the same time the balance weight 27 returns to the center, it is turned off, and the motor 13 stops rotating and the movement of the balance weight 27 also stops.

When the aircraft leans forward, the system performs the opposite action to balance the aircraft.

The horizontal inclination of the machine body can also be balanced by providing a device similar to that described above in the chassis of the combine.

Of course, any device other than the one in the embodiment may be used as the balance weight driving device.

As described above, when the aircraft is tilted, the balance weight automatically moves to change the center of gravity position left and right or front and back.Also, when the aircraft is in a horizontal position, the balance weight automatically returns to the center, so the balance weight automatically moves when the aircraft is tilted. It has the feature of preventing falls.

[Brief explanation of drawings]

FIG. 1 is a front view of a combine harvester equipped with the proposed device, and FIG. 2 is a schematic diagram of the proposed device. 12... Balance device, 13... Motor, 15... Detector, 16... Weight, 27... Balance weight.

Claims (1)

[Scope of utility model registration request] A weight that moves in the inclination direction according to the inclination of the aircraft body, a first and second switch that is separately provided at a predetermined interval in the direction of movement of the weight and is turned on by closing the contact due to the movement of the weight; A detector equipped with a third and fourth switch that is ON when the weight is in the center and OFF when the weight moves in either direction, and a motor that can be rotated in forward and reverse directions and operated by the ON-OFF operation of this detection switch. a balance weight that is moved in the opposite direction to the weight; a fifth switch that is OFF when the balance weight is at the center and ON when the balance weight is moved to one side; and a fifth switch that is turned ON when the balance weight is at the center; The 6th switch is OFF and turns ON when the para-7 weight moves to the other side.
a seventh switch that is ON when the balance weight is in the center and turns OFF when the balance weight is moved a predetermined distance in one direction; and a seventh switch that is ON when the balance weight is in the center and turns OFF when the balance weight is moved a predetermined distance in the other direction. 8 switches, the first switch and the seventh switch are inserted in series in the normal rotation circuit of the motor, and the fourth switch and the sixth switch are inserted in the normal rotation circuit. The second switch and the eighth switch are provided in parallel with the first switch and the seventh switch, respectively, the second switch and the eighth switch are inserted in series in the reversing circuit of the motor, and the third switch and the fifth switch are installed in the reversing circuit of the motor. A balance device for an agricultural machine installed in parallel with the second switch and the eighth switch, respectively.