JPH0446519Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a tilt control device for a threshing device and a reaping conveyance device in a combine harvester.

(b) Conventional technology A combine harvester is used to reap and thresh rice planted in a rice field while traveling in a paddy field, and because the ground is soft, the crawler-type traveling device may become buried, or it may be damaged during the previous process. In order to pass through the ruts, the vehicle falls into these ruts, causing a back-and-forth tilting, or pitching, or a left-right tilting, or rolling.

Despite such pitching and rolling, if the horizontal position of the reaping and transporting device is not adjusted, the cutting rod and cutting blade of the reaping and transporting device may become stuck in the mud, or Because the blade was slanted to cut at the base of the stock, problems such as the grain culm being shortened and falling during transportation, and uneven cutting marks occurred.

In order to solve this problem, a technology that allows the threshing device and reaping conveyance device of a combine harvester to be tilted back and forth and left and right is known as disclosed in Japanese Patent Laid-Open No. 102728/1983.

(c) Problems to be solved by the invention The purpose of the invention is to prevent damage to the reaping and conveying equipment, etc. when the combine harvester moves around the edge of the field.
It performs tilt control.

Combine harvesters harvest along the rows, and at the edge of the field, the tip of the harvesting and conveying device is raised significantly above the field to avoid contact with ridges or stone walls before turning. If the machine rises significantly while being tilted relative to the machine body under left/right tilt control, there is a risk that the reaping and conveying device will come into contact with the control device, etc., and the range of rise will be limited. In order to avoid this, when the machine has to rise significantly to go around the edge of the field, the control is temporarily interrupted and the reaping and conveying device is made parallel to the machine body before rising.

However, in this case as well, if you control the left and right tilt during reaping and suddenly change the position from horizontal to the field to parallel to the machine body, this operation may cause the cutting blade or reaping transport device to plunge into the soil. , there is a risk of it coming into contact with an obstacle.

In this invention, when the reaping and transporting device is raised significantly to move around the edge of the field, it is necessary to first control the left and right incline until it reaches a certain height where it will not come into contact with the control device, etc. even if it is raised horizontally. The height is such that there is no possibility of malfunctions even if the field position is maintained horizontal to the field at the time of It is designed to be corrected in parallel.

After that, it is configured to rise again and move around the edge of the field.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the structure for achieving the purpose will be explained.

In a combine harvester in which at least the reaping conveyance device C is configured to be tiltable back and forth, and the reaping conveyance device C and the threshing device D are integrally configured to be tiltable left and right on a crawler type traveling device,
When raising the reaping conveyance device C and the threshing device D together to move around the edge of the field, after raising the reaping conveyance device C and the threshing device D to a certain position while maintaining a substantially horizontal state in the tilt control state, the reaping conveyance device C and the threshing device The integrated part of the threshing device D is controlled so as to be parallel to the crawler type traveling device.

(E) Embodiments and operations The purpose and structure of the present invention are as described above. Next, the structure and operations of the embodiments shown in the attached drawings will be explained.

Figure 1 is a side view of the combine harvester of the present invention in a raised state for rounding around the edge of the field, Figure 2 is a front view of the left/right tilt control state, and Figure 3 is a front sectional view of the crawler type traveling device and chassis section. , FIG. 4 is a side sectional view, FIG. 5 is a perspective view of the chassis of the present invention, and FIG. 6 is a side sectional view.
The figure is a partial cross-sectional side view of the left-right tilting cylinder 5 and the relative inclination detection device, and FIG. 7 is a front-back tilting cylinder 6.
FIG. 8 is a side view of the elevation operation position detection device, and FIG. 8 is a plan view of the manual operation lever located on the operation panel.
FIG. 9 is a hydraulic circuit diagram of the present invention, FIG. 10 is a control electric circuit diagram, and FIG. 11 is a control block diagram.

The overall structure of the combine harvester of the present invention will be explained with reference to FIGS. 1 and 2.

The combine is composed of a crawler type traveling device, a reaping and conveying device C, a threshing device D, an engine E, a control device B, etc.

In the crawler type traveling device, truck rollers 18 are pivotally supported on left and right truck frames 10L, 10R, and crawlers 3L, 3R are rotated around them. As shown in FIG. 1, the threshing device D is composed of a handling cylinder 22, a feed chain 21, etc. In this embodiment, the threshing device D is arranged on the left side in the direction of movement of the combine.
A feed chain 21 is placed at the left end of the feed chain 21.

A paddy storage tank 23 is arranged on the right side of the threshing device D, and the fine grains that have been threshed and sorted by the threshing device D are fried and stored. A bag holder 12 on which a paddy bag is placed is arranged below the paddy storage tank 23. An engine room containing an engine E is disposed in the front part of the paddy receiving device composed of a paddy storage tank 23 and a bag holder 12, and a control device B is further disposed in front of the engine E.

The reaping and conveying device C is composed of a left end weed dividing board 1L, a right end weed dividing board 1R, left and right weeding rods 20L, 20R, a raising device, a stock head conveying device, a head tip conveying device, and the like.

Reaping position sensors 2L and 2R are arranged on the left and right sides so that the reaping conveyance device C is always horizontal with respect to the field and maintains a constant reaping height.

The left mowing position sensor 2L is the left weeding rod 2.
The right cutting position sensor 2R is suspended from near the base of the right grass dividing rod 20R. The position of the field and the height from the field are detected by the left and right reaping position sensors 2L and 2R.

Further, a left/right tilt sensor HS is arranged on the rolling chassis 9 to detect which direction the integrated portion of the reaping conveyance device C and the threshing device D is tilted with respect to the horizontal. Based on the feedback signal from the left and right tilt sensor HS, the left and right tilting cylinder 5 is expanded and contracted to keep the reaping and conveying device C and the cutting blade 25 horizontal.

In this embodiment, the left-right tilt sensor HS is placed near the left-right tilting pivot 4, which is placed between the rolling chassis 9 and the pitching chassis 8. With this configuration, the left-right tilt sensor HS is placed in the part where the shaking due to left-right tilting is the smallest, and malfunction of the sensor can be prevented.

Referring to FIGS. 3, 4, and 5, the configuration that allows left and right tilting will be explained.

Track frame 10 of crawler type traveling device
From the rear positions of L and 10R, front and rear pivot brackets 13L and 13R are arranged to protrude inwardly and upwardly, and the front and rear tilting brackets 13L, 13R are arranged.
A longitudinal tilting pivot support 7 is provided at the upper end of 13R. The pitching chassis 8 is constructed and arranged as a frame, with its front end being able to tilt vertically about the longitudinally tilting pivot support 7.

Further, a left-right tilting pivot support 4 is provided on the side of the feed chain 21 with respect to the center of the pitching chassis 8 in the left-right direction.
The right end of the rolling chassis 9 is arranged to be tiltable up and down by the left-right tilting pivot support 4. The operating device B, the reaping and conveying device C, the threshing device D, the engine E, etc. are all placed on the rolling chassis 9.
Therefore, the bag pedestal 12 and the step 11 of the control device B are also fixed to the rolling chassis 9.

A pitching chassis 8 and a rolling chassis 9 are rotatably supported by the truck frames 10L and 10R, and further supported by the truck frames 10L and 10R.
A cylinder fixing frame 15 is installed on cylinder brackets 14L and 14R that protrude upward from the front end of 0R, and the cylinder fixing frame 1
A longitudinal tilting cylinder 6 is interposed between the pitching chassis 5 and the pitching chassis 8.

Further, a left-right tilting cylinder 5 is interposed between the frame at the right end of the pitching chassis 8 and the rolling chassis 9 above.

In addition, transmission case fixing plates 16L and 16R protrude from a part of the truck frames 10L and 10R, and the transmission cases are supported on these parts, and the crawlers 3L and 3R are driven by a drive sprocket 17 fixed to the axle. be. 19 is an idler for rotating the crawlers 3L and 3R under tension.

In the overall configuration as described above, the present invention is configured as follows.

As shown in FIG. 6, a relative inclination detection device is arranged parallel to the left-right tilting cylinder 5.
The relative inclination detection device is a relative inclination detection device main body 53.
a and a detection rod 53b. A normally closed limit switch RL1 and a normally open limit switch RL2 are arranged above and below the relative inclination detection device main body 53a, and the relative inclination detection device main body 53a itself is fixed to the cylinder case of the left-right tilting cylinder 5. On the contrary, the detection rod 53b is configured to be vertically slidable together with the piston side.

The tip of the detection rod 53b is a vertical limit switch.
When the rolling chassis 9 is located between RL1 and RL2, it is parallel to the pitching chassis 8, and when the tip of the detection rod 53b moves further downward than the lower limit switch RL2, the horizontal tilting cylinder 5 has been contracted, and the rolling chassis 9 is in a state where the side of the left-right tilting cylinder 5 is close to the pitching chassis 8.

If the tip of the detection rod 53b is above the upper limit switch RL1, this means that the left-right tilting cylinder 5 is extended, and the left-right tilting cylinder 5 side of the rolling chassis 9 is away from the pitching chassis 8. . In this way, the relative relationship between the rolling chassis 9 and the pitching chassis 8 is determined by the ON/OFF state of the limit switches RL1 and RL2.
It becomes an OFF signal and the microcomputer 2
8.

In FIG. 7, an elevating operation position detection device is arranged parallel to the longitudinal tilting cylinder 6.

A normally open limit switch PL is fixed to a lifting operation position detection device main body 54a that moves integrally with the cylinder case of the longitudinal tilting cylinder 6, and a detection rod 54b fixed to the piston side.
operates this.

When the reaping and conveying device C and the threshing device D move up and down as a unit when going around the edge of the field, if they rise above a certain level, the limit switch PL of the lifting operation position detection device turns on, and the control by the left and right tilt sensor HS is turned on. released so that the rolling chassis 9 is parallel to the pitching chassis 8, i.e.
The solenoids RSO1 and RSO2 of the solenoid valve 31 of the left-right tilting cylinder 5 are operated so that the detection rod 53b is located between the limit switches RL1 and RL2.

As shown in FIG. 8, a manual operating lever 55 is arranged on the operation panel so as to be rotatable in the front, back, left, and right directions, and by rotating the manual operating lever 55 back and forth, switches S8 and S9 in FIG. 10 are operated. Then, the solenoids PSOD and PSOU of the solenoid valve 30 for the longitudinal tilting cylinder 6 are switched, and the reaping and conveying device C is manually moved up and down. Further, by tilting the manual operating lever 55 to the left and right, the limit switches S61 and S62 shown in FIG. 10 are operated to rotate the rolling chassis 9 regardless of the automatic rolling control.

Further, in FIG. 9, a hydraulic circuit is disclosed. Pressure oil pump 29 driven by the engine
Pressure oil is discharged from the cylinder, and the pressure oil is first sent to the electromagnetic valve 30 for the longitudinal tilting cylinder 6. The solenoid valve 30 is attached with solenoids PSOD and PSOU. Oil is sent to the solenoid valve 31 for the left-right tilting cylinder 5 only when the solenoid valve 30 is in the neutral position. The solenoid valve 31 includes a solenoid.
RSO1 and RSO2 are attached. Due to this configuration, the longitudinal tilting cylinder 6 and the left/right tilting cylinder 5 cannot extend or contract at the same time, and while the longitudinal tilting cylinder 6 extends to a certain position by the longitudinal rotation of the manual operation lever 55, the left/right tilting control is interrupted. When it reaches a certain position, a signal from the microcomputer 28 starts to make the reaping conveyance device C parallel to the machine body, and during this time, the expansion and contraction of the longitudinal tilting cylinder 6 is interrupted, and the machine body and the reaping conveyance unit are kept horizontal. After the apparatus C and the like become parallel, the longitudinal tilting cylinder 6 is extended again to raise the reaping and conveying apparatus C.

In FIG. 10, normally open switch S7 is linked to the operation of relay R2, and relay R
2, at least one of the upper and lower limit switches LR1 and RL2 is closed, and the limit switch PL
becomes ON when is ON, and closes (ON) switch S7. Double limit switch RL1,
Excitation of relay R2 continues until both RL2 are open, and when both are open, switch S7 is open (OFF). Relay R3 is the switch S7
is connected to the limit switch PL in the lifting operation position detection device 54 via the switch S.
7 is turned ON, relay R3 is energized and normally closed switch S10 is opened (OFF).

With the above configuration, at the end of the reaping operation, the reaping and conveying device C is maintained in the lower position and in a horizontal state.

At this time, the operator presses the manual operation lever 55.
When the reaping conveyance device C etc. is raised by operating the
While the reaping and conveying device C rises to a certain height, it remains horizontal, and when it rises above the certain height, the limit switch PL is activated as shown in the flowchart of Fig. 11.
is closed, the terminal b5 becomes high level,
the solenoid RSO1 or RSO2 until both limit switches RL1 and RL2 are open.
is excited, so that the rolling chassis 9 returns to a position parallel to the pitching chassis 8.

When modifying this rolling chassis 9,
Either the limit switch RL1 or RL2 is
ON, and if the limit switch PL is ON, the switch S10 will be OFF, and even if the manual operation lever 55 is in the ON state of the switch S9,
The longitudinal tilting cylinder 6 does not expand or contract.

Next, when the rolling chassis 9 becomes parallel to the pitching chassis 8, the limit switch RL1
and RL2 are both turned off, and switch S10 is turned off.
Since it is turned ON, the longitudinal tilting cylinder 6 of the pitching chassis 8 starts to expand and contract.

In FIG. 10, the microcomputer 28
Terminals a0 to 9 are input terminals, b1 to b5 are output terminals, key switch S1 is connected to power supply terminal a0, and automatic switch S is connected to terminal a1.
4, and a normally open switch S3 interlocked with relay R1 is connected in series to automatic switch S4. Relay R1 is energized by reaping switch S2, which turns on when the reaping clutch is engaged.
When the switch S3 is turned on and the terminal a1 becomes high level, the control circuit is placed on standby so as to enter the operating state.

The switch S5 is a switch for changing the operating speed of the left-right tilting cylinder 5 into three stages (high, medium, and low) during reaping work, and as shown in the control block diagram in Fig. 11, the width of the solenoid pulse is changed from continuous to continuous. By changing the width to a narrower one, the operating speed is changed.

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

First, since the reaping conveyance device and the threshing device are integrated and the left and right inclinations are controlled, the relationship between the transfer device and the feed chain does not change, and only the reaping conveyance device is controlled in incline. Inheritance mistakes like this do not occur. Furthermore, since the threshing device is always horizontal, the grains on the oscillating sorting device are not unevenly distributed, and the sorting performance can be improved.

Secondly, by integrating the reaping conveyance device C and the threshing device D, when the machine moves up a lot when going around the edge of the field, it can be brought back parallel to the machine body and then raised.
This eliminates the risk of contact with other control devices B, etc., and allows for a larger range of ascent. Also,
Since the slope of the field after turning is often the opposite of what it was before, it is possible to quickly converge to the next slope control state in such cases, reducing lost time before starting work. It is something.

Thirdly, when moving around the field edge, if the operator immediately adjusts the reaping transport device C to be parallel to the machine body by a large lift operation, this operation causes the reaping transport device C, which had been kept parallel to the mud, to become They were sometimes destroyed by being pushed into the soil or by coming into contact with ridges.

In the present invention, after once being raised to a position where it does not touch the control device B etc. while remaining in a horizontal state,
By returning the reaping and transporting device C from a horizontal state to a state parallel to the machine body, it was possible to eliminate accidents during the transition period between automatic control and manual control.

[Brief explanation of the drawing]

Figure 1 is a side view of the combine harvester of the present invention in a raised state for rounding around the edge of the field, Figure 2 is a front view of the left/right tilt control state, and Figure 3 is a front sectional view of the crawler type traveling device and chassis section. , FIG. 4 is a side sectional view, FIG. 5 is a perspective view of the chassis of the present invention, and FIG. 6 is a side sectional view.
The figure is a partial cross-sectional side view of the left-right tilting cylinder 5 and the relative inclination detection device, and FIG. 7 is a front-back tilting cylinder 6.
FIG. 8 is a side view of the elevation operation position detection device, and FIG. 8 is a plan view of the manual operation lever located on the operation panel.
FIG. 9 is a hydraulic circuit diagram of the present invention, FIG. 10 is a control electric circuit diagram, and FIG. 11 is a control block diagram. C... Reaping conveyance device, D... Threshing device, 1L...
...Left end grass dividing board, 1R...Right end grass dividing board, 2L, 2R
... Reaping position sensor, 3L, 3R ... Crawler, 4 ... Left and right tilting pivot, 5 ... Left and right tilting cylinder, 6 ... Longitudinal tilting cylinder, 7 ... Longitudinal tilting pivot, 8 ... Pitching chassis , 9...
Rolling chassis, 10...Truck frame, 21...Feed chain.

Claims (1)

[Scope of utility model registration request] In a combine harvester in which at least the reaping conveyance device C is configured to be tiltable back and forth, and the reaping conveyance device C and the threshing device D are integrally configured to be tiltable left and right on a crawler type traveling device,
When raising the reaping conveyance device C and the threshing device D together to move around the edge of the field, after raising the reaping conveyance device C and the threshing device D to a certain position while maintaining a substantially horizontal state in the tilt control state, the reaping conveyance device C and the threshing device A tilt control device for a combine harvester, characterized in that the integrated part of the threshing device D is controlled to be parallel to the crawler type traveling device.