JP3379118B2 - Combine cutting height control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting height control device for controlling a cutting height of a combine. 2. Description of the Related Art In the case of mowing at the edge of a ridge or the like, the mowing device is often raised at the end of mowing to increase the mowing height position. In a configuration in which the cutting height is constantly changed by the manual lever operation by manual operation, and the setting of the cutting height position is changed every time this change is made, once the cutting device is raised at the end of cutting, the subsequent cutting start is started. Sometimes, the cutting height is too high in the raised position, and it is necessary to perform the lowering operation again. The present invention eliminates such a complicated operation and facilitates the cutting height operation. SUMMARY OF THE INVENTION The present invention relates to a combine for performing a harvesting operation with a manual lever 1 based on a position of a cutting height preset by an operator.
In the case where the mowing device 2 reaches the already cut portion before the predetermined distance L progresses after the operation of the combine, the position changed by the operation of the manual lever-1 is not set to the set mowing height. The configuration of the cutting height control device is adopted. [0005] The cutting height position operated by the manual lever-1 is maintained during the cutting and running of the combine, and the cutting height of the grain stalk is maintained and controlled to be constant. At the end of the ridge or at the end of cutting, the manual lever-1 may be operated to raise the mowing device 2 slightly to perform high cutting. When the mowing is continued over the fixed traveling distance L, the cutting height position of the high mowing operated by the manual lever 1 is set to the set cutting height after the change. When the culm runs out, the cutting height position of the high cutting operated by the manual lever-1 does not become the set cutting height, but becomes the set cutting height before the operation of the manual lever-1. Is performed. For this reason, even if the cutting height is once increased by the manual lever 1, if the cutting of the fixed distance L is not performed,
At the start of subsequent mowing, the mowing device 2 is automatically lowered to the original set mowing height without operating the manual lever 1, so that mowing height control is smoothly and accurately performed, and the operation can be facilitated. Mowing
Non-cutting, in which the culm sensor 2 provided in the picking device 2 does not detect cereal stalks
During harvesting, operate the manual lever 1 to cut down
The cutting height set with the manual lever 1 has already been determined.
If it is lower than the set position set value H,
The device 2 is held at the position H1 for this manual operation. Further
The cutting height set with the manual lever 1 has already been determined.
If the position setting value H is higher than
Do not hold at the position H2 related to this manual operation,
To the current position set value H and hold it. work
Is lower than the position set value H that has already been determined.
If you want to lower the position intentionally,
So that the low mowing can be easily performed by operating the manual lever 1.
Become. In addition, the operator has already determined the position setting.
If the position is higher than the fixed value H,
Setting and manual lever 1 carelessly
It is time to touch. In the case of combine harvesting, standard cutting and
There is no problem because most of the low mowing. Therefore,
Prevents cutting higher than the standard value H
You will be able to. As shown in FIG. 4, a combine has a feed chain 4 and a clamping rod 5 on a chassis having a traveling device 3 in the form of a crawler. Threshing device 6 for threshing while nipping and transporting, a cutting frame 9, a maneuvering device 10, a harvesting grain of a mowing device 2, which is located in front of the threshing device and rises and falls by a hydraulic expansion and contraction of a cutting vertical cylinder 8 around a lift shaft 7. , And an engine E for driving these components. A weeding rod 1 is provided in front of the cutting frame 9.
1. Grain stalk raising device 12, grain stalk raking device 13, collection device 14 for collecting and harvesting culms, transport device 15 for clamping and conveying collected stalks toward the upper rear feed chain 4 and the like. , And a cutting blade device 16 in the form of a clipper is provided at a lower portion. 1
Reference numeral 7 denotes a transmission case in which a traveling transmission for transmitting the traveling device 3 is provided. On the input shaft 18 side, a hydraulic continuously variable transmission HST as a main transmission and a reverser is provided. 1
Reference numeral 9 denotes a shift lever for shifting the hydraulic continuously variable transmission HST. A manual lever-1 for performing steering and raising / lowering the reaper 2 is provided in the steering device 10. When the manual lever-1 is tilted forward from the neutral position, the lowering valve 20 in the hydraulic circuit as shown in FIG. 5 is operated to release the hydraulic pressure of the cutting upper and lower cylinders 8 to shorten it, thereby lowering the cutting device 2. . When the manual lever 1 is tilted rearward, the cutting vertical cylinder 8 is extended by the raising valve 21 and the cutting device 2 is raised. Reference numeral 33 denotes an enlargement / reduction link which is enlarged / reduced by expansion and contraction of the cutting vertical cylinder 8. When the manual lever 1 is tilted to the left, the operation of the steering valve 22 causes the left and right push cylinders 2 to move.
3 can be operated to disengage the left steering clutch and steer to the left. At this time, if the tilt angle in the same direction is further increased, the power steering valve 24 is throttled, the steering brake on the left side is effective, and the vehicle turns sharply to the left side. Also, when the manual lever-1 is tilted rightward, the push cylinder 25 can be operated in the same manner to perform rightward steering or rightward turning. In FIG. 5,
P is a hydraulic pump, T is a tank port, 26 is a relief valve, and 27 is an unload valve. 1 to 3, a raising valve 21 for raising and lowering the mowing device 2 is operated by a pulse output of a mowing solenoid 28 of a controller CPU having a microcomputer. This is performed by the pulse output of the cutting down solenoid 29. On the input side of the controller CPU, a grain culm sensor 30 for detecting whether or not the grain culm is guided to the mowing device 2 is provided in addition to the raising and lowering inputs by the manual lever-1. I have. The cutting height sensor 31 is provided at a lower portion of the cutting device 2 by a sensor of an ultrasonic type or the like, and detects a height from the cutting ground. The vehicle speed sensor 32 is provided on the side of the traveling transmission case 17 and detects rotation of a part of the transmission shaft to determine the vehicle speed. During the harvesting operation, the lowering valve 20 is turned by the output of the lowering solenoid 29 when the manual lever-1 is moved forward by the steering operation of the manual lever-1 and the manual lever-1 is tilted forward. It is switched and the cutting vertical cylinder 8
The mowing device 2 is lowered by the shortening of. If the manual lever-1 is returned to the neutral position during the lowering, the lowering valve 20 closes and the lowering of the reaper 2 is stopped, so that the reaping height can be set to a suitable position. In the controller CPU, the cutting height position is registered in the memory and becomes the set cutting height. While the cutting is in progress, the cutting height sensor 31 constantly detects the cutting height. Based on this, the cutting height is controlled by the output of the cutting vertical cylinder 8 so as to maintain the set cutting height. When changing the set cutting height, the cutting height can be changed by operating the manual lever 1 from the neutral position in the front-rear direction, and the setting cutting height can be updated. Can be. However, the operation of the manual lever 1 increases the cutting height, that is, the manual lever.
When 1 is tilted to the rear side, A is such that the cutting height is increased by the cutting grain culm sensor 30 detecting the grain stalk while the combine is running over a predetermined distance L from A at this time. The update is registered at the set cutting height.
When the grain culm sensor 30 does not detect the grain culm 34 in the middle position before reaching the point B in front, update registration of the cutting height position operated by the manual lever-1 is not performed. For this reason, it returns to the cutting height position set last time and returns. The control of the non-update processing on the cutting height increasing side by the manual lever-1 operation is the same when the reverse is performed by the reverser of the shift lever 19 during the predetermined distance L. The change of the cutting height by the manual lever 1 is the same when the cutting operation is performed in the direction of decreasing the cutting height. In particular, in the case of cutting along the edge of a ridge or in the cutting operation at the end of cutting of the streak, the cutting device 2 is frequently moved up and down or repeatedly moved back and forth. The operation is simple, and a smooth harvesting operation can be performed. 6 and 7 are different from the above example in that:
In the state where the grain culm sensor 30 does not detect the grain culm and is turned off, when the operation of the manual lever-1 is performed for cutting, the cutting height set by the manual lever-1 is in the position which has already been determined. When the value is lower than the set value H, the mowing device 2 is not returned to the position set value H but is kept at the position H1 related to the manual operation. When the reaper 2 is lowered to a position H2 higher than the position set value H,
After the manual lever-1 operation, it is lowered to the position setting position H. In a mode in which such control is not performed, even if the mowing device 2 is lowered below the position set value H in a state where the grain culm sensor 30 is OFF, when the manual lever -1 is returned to the neutral position, the mowing device 2 This is because it is difficult to operate after rising to the position set value. In FIG. 8, the point different from the above example is that by providing a lowering safety lock switch 35 which can switch ON / OFF only the circuit on the side of lowering the cutting height by the manual lever 1 for lowering the cutting device 2, thereby cutting. By turning off the lowering safety lock switch 35 at the time of inspection of the device 2, the mowing device 2 is prevented from lowering even if the cutting height is reduced by the manual lever-1. Operation in the direction of raising 2 is possible. Note that 36
Is a cutting height automatic switch. When the switch 36 is turned on, the automatic cutting height control by the cutting height sensor 31 and the like as described above is performed. In FIGS. 9 to 14, in a mode in which a multi-pole connector is provided at a connecting portion such as a traveling portion, a threshing portion, and a mowing portion of a combine, the connector is fixedly supported on the body through a cover of the connector. It is composed. Wire harness
The connectors 39 and 40 of the nests 37 and 38 can be connected and separated freely, and the outer periphery of the connected state can be opened and closed with a connector cover 41 made of a synthetic resin material. Is inserted and inserted into a U-shaped holding bracket 43 attached thereto to be detachably held. Reference numeral 44 denotes a guide ridge provided on a side surface of the connector cover 41, and performs a guide function when the connector cover 41 is attached to and detached from the holding bracket 43. The connector cover 41 has a hinge 45 as a split shape that can be opened to the left and right, and has a clip 46 for holding the connector closed. Also, the harnesses 47, 48 for holding the wire harnesses 37, 38 are also split and protrude in front of and behind the connector cover 41. This Harnessro 4
Convex and concave surfaces 51 and 52 are formed on the inner peripheral portions of the wire harnesses 37 and 38 so as to fit into concave and convex surfaces 49 and 50 formed on the outer periphery of the wire harnesses 37 and 38, and the connector cover 41 is closed. At this time, the convex and concave surfaces 51,
52 is a concave and convex surface 49 of the wire harness 37, 38,
50 can be fitted. This prevents water from entering from the outside. FIG. 13 shows a state in which the connector cover 41 is held by the body in a state where it is higher than the front and rear wire harnesses 37 and 38. FIG.
In this case, when the connector cover 41 is mounted with the harness slot 47 facing upward, an umbrella-shaped cap 53 is provided to cover the harness slot 47. These prevent rainwater or the like from entering the connector cover 41.

[Brief description of the drawings] FIG. 1 is a front view of a threshing unit. FIG. 2 is a rear view thereof. FIG. 3 is a plan view thereof. FIG. 4 is a plan view showing a part of the operation. FIG. 5 is a plan view of a part of the combine. FIG. 6 is a side view of a threshing apparatus showing a partially different embodiment. FIG. 7 is a front view thereof. FIG. 8 is a plan view thereof. FIG. 9 is a perspective view of a connector cover. FIG. 10 is a perspective view of the mounting portion. FIG. 11 is a perspective view showing a state where a connector cover is opened. FIG. 12 is a partial cross-sectional view thereof. FIG. 13 is a perspective view showing an attached state of a connector cover. FIG. 14 is a perspective view showing an attached state of a connector cover. [Explanation of symbols] 1 Manual lever 2 reaper L Constant distance

Claims (1)

(1) In a combine in which a worker performs a mowing operation based on a position of a cutting height set in advance by a manual lever (1), a fixed distance (L) advances after the operation of the manual lever (1). until, cutting when the device 2 has reached the pre-reaper, the manual lever positions that are changed by the operation of -1, a structure that does not set cutting height, culms are plan to the cutting device 2 parts
A cereal stalk sensor 30 for detecting whether
In the state where the grain stalk sensor 30 does not detect the grain stalk,
When the manual lever 1 is operated for lowering, the manual lever
The cutting height set in 1 is the position setting that has already been determined.
If the value is lower than the fixed value H, the mowing device 2 is switched to this manual operation.
The cutting height set by the manual lever 1 while being held at the position H1
Is higher than the position set value H already determined.
In this case, the mowing device 2 is held at the position H2 related to the manual operation.
Without lowering to the position set value H already determined.
A cutting height control device for a combine, characterized in that the cutting height control device is configured to perform the cutting.