JPS6056460B2 - combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combine harvester, in particular, a lifting actuator for raising and lowering a reaping section, a handling depth adjustment actuator for changing the inclination angle of a conveying body, and a steering clutch for connecting and disconnecting. This invention relates to a combine harvester equipped with an actuator for direction correction.

Conventionally, in the case of this type of combine harvester, in order to correct the traveling direction of the machine, there are functional elements for direction correction such as left and right side clutches installed in the power transmission path to both drive wheels at the bottom of the machine, and planting. A functional element for adjusting the cutting height, such as a cutting blade support member that is vertically swingably supported on the machine body in order to adjust the cutting height of the shell culm, or a functional element that is attached to the side of the machine body to adjust the handling depth of the shell culm. It is equipped with functional elements for adjusting the handling depth, such as a holding and conveying device that is supported so that it can move forward and backward in any direction. Each actuator operates the functional elements and is configured to perform automatic control as appropriate, but if multiple fluid pumps are used to drive each actuator separately, the structure becomes extremely complex. This poses many practical problems, such as being heavy, requiring a large space to mount a plurality of fluid pumps, and being expensive.

Therefore, it is desirable to configure each of these actuators to be driven by one fluid pump. If configured in this way, the drive of each of these actuators will be influenced by each other, and for example, the actuator for raising and lowering the reaping section will become inoperable due to the drive of the actuator for correcting the direction, and as a result, the actuator may run into a convex part of the field or ridge. Problems such as when the reaping section cannot be raised even though the reaping section must be urgently raised against an obstacle while the reaping section is running, and the reaping section comes into contact with a protrusion etc. and is damaged. , the cutting height or handling depth adjustment drive by the lifting actuator or handling depth adjustment actuator is interrupted midway through adjustment due to the drive of the field correction actuator, and as a result, the cutting height or handling depth is not appropriate. There was a problem that the unprocessed amount at the time of threshing increased. The present invention was invented in view of the above problems.
The purpose is to use one fluid pump to drive the lifting actuator, handling depth adjustment actuator, and field correction actuator separately, and to provide an extremely simple structure and low cost. It is possible to reduce the weight and size, and prevent damage to the reaping section due to it rushing into convex parts of the field or coming into contact with ridges or obstacles while driving. Priority is given to raising and lowering the reaping section, which requires emergency operations for the purpose of reaping, and raising and lowering the reaping section, which are basic operations during reaping work, such as lowering the reaping section and raising the reaping section during turning. By setting the order according to the functions of each actuator, such as prioritizing handling depth adjustment control that is operated according to height and crop conditions, and performing direction correction control last, it is possible to improve overall work with the combine harvester. The goal is to achieve the intended purpose without causing any hindrance.

Therefore, the configuration of the present invention includes a lifting actuator 11 for raising and lowering the reaping section, a handling depth adjusting actuator 12 for changing the inclination angle of the conveying body, and a steering clutch for connecting and disconnecting the steering clutch. In a combine harvester equipped with one-way correction actuators 13a, 13b, one fluid pump P for driving each of the actuators 11, 12, 13a, 13b is provided, and each of the actuators 11, 12, 13b is provided on the discharge side of the pump P. The actuators 13a and 13b are connected in such a way that the lifting actuator 11, the handling depth adjusting actuator 12, and the direction correcting actuators 13a and 13b are driven with priority in this order.

Embodiments of the present invention will be described below based on the drawings.

The combine harvester, which is generally indicated by the symbol A in the figure, connects drive wheels 22 provided on both sides of the lower part of the machine body 1 to a prime mover (not shown) mounted on the machine body 1, and also connects the drive wheels 22 provided on both sides of the lower part of the machine body 1 to the front part of the machine body 1. The cutting blade 5 of the reaping device 3 provided at The driving wheels 2, 2 are driven by the prime mover to make the machine body 1 travel, and the cutting blade 5 is driven to cut the planted culm, and the cut culm (carrying body)
is conveyed and supplied to a feed chain 7 via a clamping and conveying device 6, and the culm is threshed by driving the handling cylinder during conveyance by the feed chain 7,
Further, the direction of movement of the machine body 1 is corrected by disengaging the steering clutch that transmits power to the two driving wheels 2, 2, and the vertical swinging of the reaping section 8 with the cutting blade 5 relative to the machine body 1 is prevented. The cutting height of the shell culm is changed and adjusted, and the amount of insertion of the shell culm into the handling barrel chamber, that is, the handling depth is changed and adjusted by moving the holding and conveying device 6 laterally with respect to the machine body 1. It is configured like this.

In the figure, numeral 9 is a branching rod provided at the front of the fuselage 1, and numeral 10 is a shell culm insertion port into the handling trunk room. Accordingly, the present invention provides a combine harvester A having the above-described structure, in which a lifting actuator 11 is interposed between the reaping section 8 and the machine body 1, and the reaping section 8 is raised and lowered in the vertical direction by driving the actuator 11. It is configured to change and adjust the cutting height of the culm by the cutting blade 5, and an actuator 12 for adjusting the handling depth is interposed between the conveying device 6 and the machine body 1, and by driving the actuator 12. The conveying device 6 is moved in and out in the lateral direction to change the inclination angle of the conveying body such as the shell culm, and to change and adjust the handling depth of the shell culm with the handling cylinder. 2, 2, each operating arm 15a, 15b of the left and right side clutches (not shown) installed in the power transmission mechanism
Direction correction actuators 13a and 13b are connected to the
The left and right side clutches are actuated separately via the operating arms 15a and 15b by driving the actuators 13a and 13b, and the direction of the aircraft body 1 is corrected by cutting off power transmission to the driving wheels 2 and 2. It is.

Therefore, each actuator 11 configured as described above,
12, 13a and 13b are electromagnetic switching valves (hereinafter referred to as electromagnetic valves) 16 and 13 for one fluid pump P, respectively, as shown in FIG.
At this time, the solenoid valves 16, 17, and 18 are connected in series, and the solenoid valve 16 to which the lifting actuator 11 is connected is placed at the most upstream position of the fluid pump P. Further, a solenoid valve 17 to which a handling depth adjustment actuator 12 is connected is disposed downstream of the solenoid valve 16, and a solenoid valve 18 to which direction correction actuators 13a and 13b are connected is disposed at the most downstream position. , thus the lifting actuator 11, the handling depth adjustment actuator 12, and the direction correction actuator 13a.
, 13b are preferentially driven in this order.

Further, each of the solenoid valves 16, 17, 18 is connected to a power source E as shown in FIG.
3a and 13b are automatically controlled.

That is, a sensor 1 for sensing the cutting height is installed at the bottom of the cutting rod 9.
9, sensors 20a, 20b, and 20c for sensing depth of handling are provided at the culm insertion opening 10, and a sensor 21 for direction correction is provided at the side of the cutting rod 9. Normally open contact Lsl- of an upper limit switch (not shown) operated by height sensing sensor 19
one solenoid (SOLl) of the solenoid valve 16 via a
) is also the normally open point JS of the lower limit switch (not shown)
The other solenoids (SOL2) are connected to the power source E via the handlebars 21a, and the handling depth sensing sensors 20a, 2
Of 0b and 20c, sensor 20a for sensing the root of the culm
Starting limit switch (not shown) operated by
The electromagnetic valve 17
One solenoid (SOL3) is connected to the power source E, and a backward limit switch (
The other solenoid (SOL4) of this solenoid valve 17 is connected to the power source E via a normally open contact Ls5-a (not shown),
Further, a normally open contact Ls6 of a right correction limit switch (not shown) operated by the direction correction sensor 21
-a to one solenoid (SOL) of the solenoid valve 18.
5), and the other solenoid (SOL) via the normally open connection of the left correction limit switch (not shown) and the
6) are connected to the power supply E, respectively.

The combine harvester of the present invention is constructed as described above, and while the drive wheels 2, 2 are driven to drive the machine body 1 in the field, the harvester harvests the planted culms in the field via the reaping device 3. The harvested husks are threshed using a threshing device 4.

During such reaping grain work, if the height of the cutting blade 5 from the ground is low due to irregularities in the field and the cutting height of the culm is low, the sensor 19 for sensing the cutting height is activated and the upper limit switch is operated. Then, this normally open contact LSL-a is closed, and the solenoid (S
Since the connection circuit of OLl) to the power source E is closed, the solenoid (SOLl) is energized, and the solenoid valve 16 moves to the right in the figure to supply pressurized fluid from the fluid pump P to the lifting actuator 11. Then, the actuator 11 is driven to raise the cutting section 8, thereby automatically adjusting the cutting height of the canopy to become higher. On the other hand, if the mowing height of the culm is high, use the solenoid (SOL2) in the same manner as above.
is energized, the solenoid valve 16 moves to the left in the figure to release the pressure fluid in the actuator 11, and the reaping section 8 is lowered to automatically adjust the cutting height of the culm to be lower. In addition, when the cut culm is threshed by the threshing device 4 based on the appropriate handling depth as described above, the root and middle parts of the culm can be detected by supplying the culm to the handling barrel chamber. The sensors 20a and 20b are activated, and the starting limit switch is operated to close its normally open contact LS31a, and the advance limit switch is operated to close its normally open contact LS, -b.
is opened to open the connection circuit for the solenoid (SOL3) to the power supply E.

・In addition, the sensor 20c for detecting the tip of the culm is in a non-operating state, and the normally open contact of the backward limit switch is closed. -a remains open), the circuit connecting the solenoid (SOL, ) to the power source E remains open, and therefore the solenoid valve 17 is not activated and is maintained at the neutral position. . If the shell culm supplied to the handling barrel chamber becomes short in such a state, the shell culm no longer comes into contact with the intermediate portion detection sensor 20b, and the operation of the advance limit switch is released, so that the normal Open contacts LS4-7b are in their original positions (closed)
, the solenoid (SOL3) is energized, the solenoid valve 17 moves to the left in the figure, and the pressure fluid from the fluid pump P is supplied to the right chamber of the actuator 12 for adjusting the handling depth.
The actuator 12 is driven to advance the holding and conveying device 6, and the depth of insertion of the culm into the handling barrel chamber is automatically adjusted.

On the other hand, when the culm is long, the tip detection sensor 20c comes into contact with the culm and is activated, which operates the retreat limit switch and closes the normally open contact Ls5-a, so the solenoid (SOL, ) is closed, the solenoid (SOL4) is energized, the solenoid valve 17 is moved to the right in the figure, and the pressurized fluid from the fluid pump P is supplied to the left chamber of the actuator 12. , drive the actuator 12 to move the holding and conveying device 6 backward;
The amount of insertion of the culm into the handling barrel chamber is automatically adjusted to become shallow.

Furthermore, as mentioned above, when the aircraft 1 is moving straight along the planted culm in the field, the sensor 21 for direction correction is in proper contact with the planted culm, but this aircraft 1 If the traveling direction of the sensor 21 shifts to the right, the sensor 21 will no longer come into contact with the planted culm, and this sensor 21 will operate to operate the left correction limit switch and open its normally open contact Ls6-a.
Since the solenoid (SL5) is closed and the connection circuit to the power supply E is closed, the solenoid (SOL5) is energized and the solenoid valve 18 moves to the right in the figure, and the pressure fluid from the fluid pump P is directed to correct the direction. The signal is supplied to the actuator 13a to drive the actuator 13a.

As a result, the left side clutch is switched to the power cutoff side, and only the right drive wheel 2 is driven, so that the body 1 is automatically corrected to face leftward. On the other hand, if the direction of movement of the aircraft 1 deviates to the left or right, the sensor 21 will not move toward the planted culm. The contact becomes deeper and the sensor 2
1 operates in the suction direction from the above, operates the right correction limit switch, closes its normally open contact Ls7-a, and closes the connection circuit of the solenoid (SOL6) to the power supply E, so the solenoid (SOL6) ) is energized and the solenoid valve 18 is activated as shown in Fig. Move to the middle left, supply pressure fluid from the fluid pump P to the direction correction actuator 13b, and move the actuator 1
3b is driven. As a result, the right side clutch is switched to the power cutoff side, and only the left drive wheel 2 is driven, so that the body 11 is automatically corrected to turn rightward. Therefore, the lifting actuator 11 is not influenced by the driving of the other actuators 12, 13a, 13b, and
Even if 13a or 13b is being driven, if the lifting actuator 11 is driven, the other actuator 12 or 1
The supply of pressure fluid to 3a and 13b can be interrupted and the driving of the lifting actuator 11 can be given top priority. Top priority can be given to raising and lowering the reaping section and controlling the raising and lowering of the reaping section, which is the basic operation of reaping work.
It is.

Next, the handling depth adjusting actuator 12 is not affected by the driving of the direction correcting actuators 13a, 13b, and the handling depth adjusting actuator 12 is
Even when the actuators 13a and 13b are being driven, priority can be given to driving the actuators 13a and 13b, thereby giving priority to the adjustment control of the cutting height by the reaping section and the handling depth, which is controlled by crop conditions, over direction correction. It is possible.

Incidentally, the actuator 11, 1 for raising/lowering or adjusting the handling depth
When actuator 2 is driven preferentially, the direction correction actuator 1
3a and 13b become inoperable, but since the operating time of the actuators 11 and 12 for raising/lowering or handling depth adjustment, which are given priority, is very short, the actuators 13a and 13 for direction correction cannot be driven.
The time that 3b is unable to drive is also short and does not significantly affect direction correction. In addition, even if uncut leaves are caused due to a mistake in direction correction, it can be repaired by reversing the machine, mowing twice in the next stroke, or by hand mowing. Therefore, even if each of the actuators 11, 12, 13a, 13b is driven by one fluid pump P, the performance of the combine harvester as a whole does not deteriorate in any way.

As described below, according to the present invention, the lifting actuator, the handling depth adjusting actuator, and the direction correcting actuator can be independently driven by one fluid pump, so that each actuator can be driven independently. Compared to the case where a pump is provided, it can be provided with an extremely simple structure and at low cost, and it can also be made lighter and smaller. Since the adjustment actuator and the direction correction actuator are connected in such a way that they are driven preferentially in that order, the reaping section may run into a convex part of the field, come into contact with a ridge or an obstacle while traveling, and the reaping section may To prevent damage, top priority is given to raising and lowering the reaping section, which requires emergency operations, and raising and lowering the reaping section, which are basic operations during reaping work, such as lowering the reaping section and raising the reaping section during turning. and then control the cutting height by the reaping section and the handling depth that is operated according to the crop conditions.
By setting the order according to the function of each actuator, priority can be given to direction correction, and even if each actuator is driven by one fluid pump, the performance of the combine harvester as a whole will be affected. There will be no decline.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is a perspective view thereof, FIG. 2 is a hydraulic circuit diagram, and FIG. 3 is an electric circuit diagram. A... Combine harvester, 11... Lifting actuator, 12... Actuator for adjusting handling depth, 13a, 13b... Actuator for direction correction, P. ...Fluid (hydraulic) pump.

Claims (1)

[Claims] 1. A lifting actuator 11 for raising and lowering the reaping section, a handling depth adjusting actuator 12 for changing the inclination angle of the carrier, and direction correction actuators 13a and 13b for connecting and disconnecting the steering clutch. In the combine equipped with the actuators 11, 12,
13a, 13b is provided, and each of the actuators 11, 1 is provided on the discharge side of the pump P.
2, 13a, and 13b are connected so as to be driven preferentially in the order of the lifting actuator 11, the handling depth adjustment actuator 12, and the direction correction actuator 13a, 13b.