JP2000125645A - Clutch-operating equipment of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clutch-operating equipment of a combine harvester, enabling to perform detachment operation of an operating clutch under a suitable timing according to operating situations while dissolving troublesome operations. SOLUTION: This operating equipment is assembled in such a way that a traveling chassis 2 has a reaping unit 5 vertically moving between a lower operating position and an upper nonoperatiing, escaping one, an operating clutch for on-off action of transmission to the reaping unit 5 is automatically released when a state changes from reaping operation to non-reaping one and the position of the unit 5 becomes higher than its prescribed height, and the height can be freely set and changed manually.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing work section provided to a traveling machine body so as to be vertically movable between a lower working position and an upper non-working evacuation position. A work clutch that turns on and off the power transmission
An actuator that can be operated by disengaging this work clutch,
Clutch control means for controlling the operation of the actuator is provided, and the clutch control means controls the actuator so as to be in the transmission off state when the mowing unit is in the non-work retracting position. The present invention relates to a combined clutch operating device.

[0002]

2. Description of the Related Art Conventionally, in a combine clutch operating device having the above structure, as shown in Japanese Patent Application Laid-Open No. 7-46930, a work clutch (reaching clutch) is turned on and off by an actuator (electric cylinder). There has been a configuration in which the actuator is controlled so that the work clutch is disengaged when the limit switch detects that the mowing work unit has been raised above the set position.

[0003]

In the above-mentioned conventional construction, the work clutch is forcibly disengaged when the reaping work section rises beyond the set position. It is not necessary to perform any manual operation for disengaging the work clutch, such as operating the tool, and the operation can be simplified.However, the set position for disengaging the work clutch is fixed. Therefore, there were the following disadvantages.

For example, if the set position is set to a high position close to the operation limit on the ascending side of the elevating operation area, even if it is not necessary to elevate the mowing work section, for example, it is always near the maximum ascending position. Must be raised to
There is annoying operation. Therefore, if the setting position is set to a lower position in advance, the above-described inconvenience is resolved, but the possibility that the mowing work unit comes into contact with the ridge when turning around at the ridge or the like is increased. There are inconveniences, and when mowing work is performed while raising the mowing part at the edge of a ridge, etc., the work clutch is disengaged during the ascent and the harvested culm is not transported and spills out to the outside, etc. There are disadvantages that cannot be addressed.

The present invention has been made in view of such a point, and an object of the present invention is to solve the troublesome operation and to disengage a work clutch at an appropriate timing according to work conditions and the like. Another object of the present invention is to provide a clutch operating device of a combine which can be operated.

[0006]

According to the first aspect of the present invention, the mowing work is lowered to the lower working position, the work clutch is engaged, and the mowing operation is performed. Is reached, for example, the mowing work section is raised to make the aircraft turn, and the working state detecting means is switched from the state where the cutting work state is detected to the state where the non-cutting state is detected and is high. When the height of the mowing work section detected by the detecting means exceeds the set height, the working clutch in the transmission-on state is automatically switched to the transmission-off state.
The set height can be changed by a manual operation by the height setting means.

[0007] For example, in the case of performing a so-called mowing operation, in which the mowing work portion is sequentially raised, so that the mowing work portion does not collide with the ridge near the edge of the mowing work, or a mowing operation is performed when turning. If there is a possibility that the part may come into contact with an external object such as a ridge, setting the height to a higher value may cause the work clutch to be unexpectedly turned off during the mowing work, or the mowing during turning operation. The possibility that the working unit comes into contact with an external object such as a ridge can be avoided beforehand. Also, for example, when there is little risk of contact with foreign objects such as ridges when making a turn, and it is not necessary to raise the mowing work section significantly, setting the set height to a low level may reduce the mowing work. The work clutch can be disengaged and turned by simply raising the part to a relatively low position.Each time the turn is made, the mowing work part is raised to a high position near the maximum rising position or lowered again. This eliminates the need for troublesome operations such as squeezing, thereby improving work efficiency.

Further, the work clutch is not disengaged until the work state detecting means switches from the state where the cutting work state is detected to the state where the non-cutting state is detected.
Even when the set height is set lower, the work clutch is switched off after switching to the non-cutting work, so that the work clutch is erroneously turned off during the cutting work and the cutting work is performed. The inconvenience of being unable to perform well can be avoided beforehand.

Therefore, while the operation clutch can be disengaged in conjunction with the raising operation of the mowing work section, the trouble of the operation can be eliminated, but the operation clutch can be disengaged at an appropriate timing according to the work situation at that time. This makes it possible to provide a combine clutch operating device which is excellent in convenience in use.

According to a second aspect of the present invention, when the height of the reaping work section detected by the height detecting means is lower than the set height, the clutch control means may perform the transmission disengagement. The actuator is controlled such that the working clutch in a state is in a transmission-engaged state.

Therefore, the work clutch can be disengaged with the lowering operation of the reaper, and the work clutch can be automatically engaged with the lowering operation of the reaper. Improvement can be achieved.

According to the third aspect of the present invention, there is provided a manually operated command means for instructing ascending and descending, and a command for ascending by the command means when the mowing unit is in the working position. When the mowing unit is raised to the set height set by the setting unit, and the mowing unit is at the set height, and the lowering unit is instructed by the command unit, the mowing unit is operated. Automatic raising and lowering operation means for lowering to the use position.

That is, when the commanding means instructs the ascent at the end of the work stroke, the mowing work section automatically rises from the working position to the set height, and then when the commanding means instructs the descending, the mowing is automatically performed. The working unit descends from the set height to the working position. Therefore, by one-touch operation, it is possible to automatically ascend to the height artificially set by the setting means, or to lower to the work position, and at the same time, the disengagement operation of the work clutch is performed simultaneously with the ascent operation, Further, the operability is excellent.

According to a fourth aspect of the present invention, the working state detecting means detects whether the cutting section is in a cutting state or in a non-cutting state based on the presence or absence of a cut culm in the cutting section. The clutch control means is configured such that when the set time elapses from when the work state detection means switches from the grain stalk presence state to the grain stalk non-existence state,
It is configured to determine that the cutting operation state has been switched to the non-cutting state.

That is, it is determined that the cutting mode has been switched to the non-cutting state after a lapse of a set time from the switching from the cereal-stalk-existing state to the cereal-stalk-non-existing state. When the height exceeds the height, the work clutch is disengaged. Therefore, for example, if the configuration is such that the work clutch is immediately disengaged as soon as it rises above the set height, the work clutch is erroneously disengaged and cut in the state where the mowing culm is present in the mowing work section. There is a risk of causing disadvantages such as spilling to the outside, but according to the present invention, such disadvantages can be prevented beforehand and convenience in use can be improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A combine as an example of a working vehicle according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the combine is equipped with a threshing device 3 mounted on a traveling machine body 2 having a pair of right and left crawler traveling devices 1R and 1L, and a harvesting operation is performed at a front portion of the machine body so as to be able to move up and down and swing freely around a horizontal axis X. The cutting section 5 is connected, and the driving section 4 is provided on one side of the mowing work section 5.

The cutting work unit 5 includes a raising device 6 for causing the planted grain culm to fall, a clipper-type cutting blade 7 for cutting the stem of the raised grain culm, and a cutting blade for cutting the stem. A vertical conveying device 8 and the like are provided for nipping and transporting the stem side of the grain culm and locking and transporting the tip side while gradually changing the standing posture to the side-down posture and guiding the same to the starting end of the threshing feed chain 3a. It is configured. And this mowing work part 5
Is provided so as to be vertically movable by a lifting hydraulic cylinder 9 between a mowing work position located on a lower side and a non-work evacuation position on an upper side.

At the transport start end side of the vertical transport device 8,
A switch-type stock sensor S0 (an example of a cutting operation state detecting unit) is provided which is turned on when there is a harvested grain culm to be conveyed, and is turned off when there is no grain culm. Is provided with a potentiometer type elevating position sensor 22 (an example of height detecting means) for detecting the height of the mowing work unit 5 against the machine body. The operating unit 4 includes a height setting unit for the operator to manually set the height of the non-working evacuation position on the raising operation side of the mowing work unit 5 to an arbitrary height. A potentiometer type height setting device 23 is provided (see FIG. 3).

Next, the transmission structure of the combine will be described. As shown in FIG. 2, the power of the engine E mounted on the lower side of the driving unit is supplied to the threshing device 3 via a belt tensioning threshing clutch CL1, while the power of the engine E is transmitted to the belt. The power transmitted to the traveling mission case MC via the device 10 is transmitted to the left and right crawler traveling devices 1R and 1L while the power after being shifted in the traveling mission case MC is transmitted to the belt tension type reaping clutch CL2 ( A power transmission system is configured so that power is supplied to the reaping work unit 5 via an example of a work clutch. The reaping clutch CL2 is operated by an electric cylinder 12 as an example of an actuator.
It is configured to be operated to be switched between a transmission on state and a transmission off state. The threshing clutch CL1 is configured to be manually turned on and off by a threshing clutch lever (not shown) provided in the driving section 4. When the threshing clutch CL1 is turned on, the threshing clutch CL1 is turned on. A threshing switch SW1 for detecting the on / off state of the threshing clutch CL1 is provided so as to be turned off (see FIG. 3).

Next, the control structure for the raising and lowering operation of the reaping work unit 5 and the on / off operation of the reaping clutch CL2 will be described. As shown in FIG. 3, a lowering switch SW that is turned on when a cutting and raising / lowering lever 16 provided on the driving unit 4 is swingably operated to swing forward and backward from a neutral position.
2. An automatic raising and lowering switch SW3 is provided which is turned on when the cutting and raising / lowering lever 16 is pivoted from the neutral position to the rear side. Switch SW4
Is provided. Then, as shown in the figure, a solenoid-operated hydraulic control valve V for the lifting hydraulic cylinder 9 and a control device H using a microcomputer for controlling the respective operations of the electric cylinder 12 for operating the cutting clutch CL2 are provided. The control device H receives the information of each of the down switch SW2, the up switch SW3, and the automatic up / down switch SW4. The height setting device 23, the up / down position sensor 22, the stock sensor. S
0 and information of each of the threshing switches SW1 are also input.

The control device H is configured to execute the following manual lifting operation, automatic lifting operation, and on / off operation of the cutting clutch CL2. [Manual lifting / lowering operation] When the raising switch SW2 is turned on by the operation of the harvesting raising / lowering lever 16 (when manual raising is commanded), the mowing work unit 5 is raised, and when the lowering switch SW3 is turned on (when manual lowering is commanded). The mowing unit 5 is lowered. [Automatic raising / lowering operation] When the automatic raising / lowering switch SW4 is pressed (automatic raising is commanded) while the mowing work unit 5 is at the mowing position, the mowing work unit 5 is manually moved by the potentiometer type height setting device 23. When the automatic raising / lowering switch SW4 is pressed (automatic lowering is instructed) while the mowing unit 5 is at the set height, the mowing unit 5 is raised. To the mowing position. [On / Off operation of the reaping clutch CL2] Stock sensor S0
The set time has elapsed since the state was switched from the cereal stalk presence state (ON state) to the cereal stalk non-existence state (OFF state), and the height of the mowing work unit 5 detected by the elevating position sensor 22. When the height exceeds the set height, the electric cylinder 12 is operated so that the mowing clutch CL2 in the transmission-on state is in the power-off state, and when the height of the mowing work section 5 falls below the set height, the mowing clutch CL2 is activated. The electric cylinder 12 is operated so as to enter the transmission state.

Accordingly, the control device is provided with an automatic lifting switch S
Lifting control means 100 for executing a control operation on the lifting hydraulic cylinder 9 based on the operation of W4;
Control means 101 for controlling the electric cylinder 12 to turn on and off the reaping clutch CL2 in accordance with the elevating operation of
Are provided in the form of control programs.

The set height set by the height setting unit 23 can be changed and set in the entire range of the ascending and descending range of the mowing work unit 5, but it can be set at a lower position. If it is set, it may be difficult to use. Therefore, the reaper 5 can be changed and adjusted within an adjustment range above the intermediate position of the range in which the reaping work unit 5 can be moved up and down.

Next, the control operation of the control device will be described based on a flowchart. FIG. 4 shows a flowchart of the automatic elevating operation, and FIG. 5 shows an example of a timing chart.

When the automatic up / down switch SW4 is turned on while in the mowing work position, the up / down hydraulic cylinder 9 is turned on.
Is raised (steps 1, 2, 3). A set time (equivalent to the time required for all the cut culms to be conveyed to the threshing apparatus) has elapsed since the stock sensor S0 was switched from the on state to the off state, and the elevation position sensor 22 When the mowing unit 5 rises above the preset height (see Hs in FIG. 5) set by the height setting unit 23 on the basis of the detection information, the climbing operation is stopped and the mowing in the entering operation state is stopped. The electric cylinder 12 is operated so that the clutch CL2 is disengaged (Step 4,
5, 6, 7).

When the automatic lifting switch SW4 is turned on while the mowing unit 5 is at a height equal to or higher than the set height, based on information detected by the lifting position sensor 22,
The raising / lowering hydraulic cylinder 9 is moved down until the mowing work section 5 moves down to the mowing work position (steps 8 and 9). If the height of the mowing work unit 5 falls below the set height during the lowering operation, the mowing clutch CL2 in the cutting operation state is set.
The electric cylinder 12 is operated so as to perform the operation (steps 10 and 11). When the mowing work unit 5 moves down to the mowing work position, the lowering operation is stopped (steps 12 and 1).
3). When the automatic raising / lowering switch SW4 is turned on, the raising / lowering operation is not performed unless the mowing work unit 5 is at the mowing work position or at a position higher than the set height (step 1).
4). In this case, manual operation is required.

Therefore, the operator can operate the automatic lifting switch SW4
By simply pressing the button with a finger, the mowing work section 5 is automatically moved over the mowing work position and the set height position (non-work evacuation position) set to an arbitrary height by the height setting device 23. The lifting operation can be performed alternately, and the cutting clutch CL2 can be automatically turned on and off accordingly, resulting in excellent operability.

Next, the manual lifting operation will be described with reference to the flowchart shown in FIG. The control operation for the manual elevating operation is configured to be executed by interrupt processing by operating the ascent switch SW2 or the descent switch SW3, and has a higher priority than the automatic elevating control as described above. However, this manual operation is executed with priority.

When the raising switch SW2 is operated, based on the information of the raising and lowering position sensor 22, if the mowing unit 5 has not reached the maximum raising position (upper limit position) of the raising and lowering operation area or a position close to the maximum raising position (upper limit position). The hydraulic cylinder 9 is raised (steps 21, 22, 23). During this ascent operation, the set time has elapsed since the stock sensor S0 was switched from the on state to the off state, and the reaping work unit 5
Rises above the preset height set in advance by the height setting device 23, the electric cylinder 12 is operated so as to operate the cutting clutch CL2 in the on-operation state (steps 24, 25, 26). When the operation of the raising switch SW2 is stopped, or when the mowing unit 5 reaches the maximum raising position of the raising and lowering operation area or a position close thereto (upper limit position), the raising operation is stopped (steps 21, 34, 22, and 27). ).

When the lowering switch SW3 is operated, the raising / lowering hydraulic cylinder 9 is lowered based on the detection information of the raising / lowering position sensor 22 until the mowing work section 5 reaches the mowing work position (steps 28, 29, 29). 30). If the cutting work unit 5 becomes lower than the preset height set by the height setting unit 23 during the lowering operation, the electric cylinder 12 is operated to make the cutting clutch CL2 in the cutting operation state enter and operate (step 31). , 32). Down switch SW3
Is stopped, or when the mowing work unit 5 reaches the mowing work position, the lowering operation is stopped (step 2).
8, 34, 29, 33).

Therefore, the automatic lifting switch SW4 is
The lifting control means 100, the control valve V, the lifting hydraulic cylinder 9 and the like constitute an automatic lifting and lowering operation means corresponding to the manually operated command means for instructing the raising and lowering. Further, the on / off operation of the cutting clutch CL2 as described above is based on the premise that the threshing clutch CL1 has been engaged, and if the off of the threshing switch SW1 is detected, the control device H operates the electric cylinder 12 The on / off operation of the reaping clutch CL2 is not executed.

[Another Embodiment] (1) In the above embodiment, the set height at which the cutting clutch is disengaged and the height at which the raising operation is automatically performed by the automatic raising and lowering operation are the same. Although the operability and the simplification of the configuration can be improved by also using the setting means, instead of such a configuration, a setting means for setting a clutch disengagement height, and an automatic elevating May be provided separately from the setting means for setting the height.

(2) In the above embodiment, in the automatic raising / lowering control operation based on the operation of the automatic raising / lowering switch SW4, when the automatic lifting / lowering switch SW4 is turned on, the reaping work unit 5 is moved to the reaping work position or the set height or more. If the position is not in the position, the lifting operation is not performed, but instead of such a configuration, for example, if the operation exceeds the set level set in the middle position of the lifting operation range, the operation is lowered, and the set level is changed. If it is lower, it may be configured to perform an ascent operation.

(3) In the above embodiment, one automatic lifting switch SW is used as the command means for commanding the ascending and descending.
Although the configuration is made in 4, the configuration may be such that an ascending command section for instructing ascending and a descending command section for instructing descending are provided separately.

(4) In the above embodiment, the working state detecting means is configured to detect whether the cutting work state or the non-cutting state based on the presence or absence of the cut culm in the cutting work section, When the set time elapses from the time when the work state detecting means switches from the grain stalk presence state to the grain stalk non-existence state, it is configured to determine that the cutting state has been switched to the non-cutting state. The following configuration may be used instead of the configuration. For example, a detection means for detecting the presence or absence of a grain culm near the entrance of the grain culm of the threshing device is provided, and when the detection means continuously detects the absence of the culm for a set time or more, the state is switched from the cutting operation state to the non-cutting state. The present invention can be implemented in various forms, such as a configuration in which it is determined that there is a failure.

(5) In the above-described embodiment, the mowing clutch is automatically turned on and off when the mowing unit is raised and lowered, respectively. It is also possible to adopt a configuration in which only the clutch disengagement operation when raising the garment from the work position is automatically executed, and the operation for engaging the reaping clutch is separately executed manually.

(6) In the above embodiment, the height detecting means is configured to detect the relative height of the mowing work unit with respect to the traveling machine body, that is, the height of the body relative to the machine body. For example, an ultrasonic sensor or a laser distance measuring device may be used to directly detect the distance from the ground of the mowing work unit as a height, and the set height corresponds to such a distance from the ground. May be set.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 Transmission system diagram

FIG. 3 is a control block diagram.

FIG. 4 is a flowchart of a control operation.

FIG. 5 is a timing chart.

FIG. 6 is a flowchart of a control operation.

[Explanation of symbols]

 Reference Signs List 2 traveling machine body 5 mowing work section 12 actuator 22 height detecting means 23 height setting means 100 clutch controlling means CL2 working clutch S0 working state detecting means SW4 commanding means

Claims (4)

[Claims] 1. A mowing work section is provided for a traveling body so as to be vertically movable between a lower working position and an upper non-work evacuation position, and turns on / off power transmission to the mowing work section. A work clutch, an actuator capable of disengaging the work clutch, and clutch control means for controlling the operation of the actuator, wherein the clutch control means determines that the mowing work section is at the non-work retracting position. A clutch operating device of a combine configured to control the actuator so as to be in a power-off state, wherein a working state detecting means for detecting whether a cutting state or a non-cutting state, Height detecting means for detecting the height of the reaping work section, wherein the clutch control means, wherein the working state detecting means detects the reaping work state; The working clutch in the transmission-in state is switched from the engaged state to the state in which the non-cutting state is detected, and when the height of the cutting work section detected by the height detecting means exceeds a set height. A clutch operating device of a combine which is configured to control the actuator so as to be in the transmission off state, and provided with height setting means capable of changing and setting the set height by manual operation. 2. The clutch control means, wherein when the height of the reaping work section detected by the height detection means falls below the set height, the work clutch in a transmission disengaged state is in a transmission engaged state. The clutch operating device for a combine according to claim 1, wherein the clutch operating device is configured to control the actuator so that 3. An artificially operated commanding means for commanding ascent and descent, and when the commanding means instructs ascending when the reaping unit is in the working position, the reaping unit is set to the The raising operation is performed to the set height set by the setting means, and when the lowering operation unit is at the set height and the commanding unit instructs the lowering operation, the cutting operation unit is moved to the height. The clutch operating device for a combine according to claim 1 or 2, further comprising an automatic raising / lowering operating means for lowering the working position. 4. The working state detecting means is configured to detect whether a cutting work state or a non-cutting state based on the presence or absence of a cut culm in the cutting work part. When the set time elapses after the work state detecting means switches from the cereal stalk presence state to the cereal stalk non-existence state, it is configured to determine that the cutting state has been switched to the non-cutting state. The clutch operating device for a combine according to any one of claims 1 to 3, wherein: