JP2788571B2 - Combine handling depth control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main transmission for traveling provided with a main transmission for traveling and a sub transmission for traveling for changing the output from the main transmission. A pair of ear position detecting means, which are provided so as to be driven by the output of the apparatus and detect the ear position of the cereal culm in the conveying path of the cereal culm conveyed by the conveying apparatus, have a culm direction of the cereal culm. Are provided at an interval in the transport path,
Grain stalk presence / absence detecting means for detecting the presence / absence of the transported grain culm is provided on the transport direction upper side than the pair of ear tip position detecting means,
Handling depth adjustment means for adjusting the handling depth in the threshing device,
It is provided so as to adjust the handling depth on the grain culm transport direction upper side than the installation location of the pair of tip position detection means, and the rotation speed of the rotating body driven and rotated by the output of the traveling auxiliary transmission device. Traveling distance detection means for detecting a traveling distance based on the information of the pair of head position detection means, the grain stalk presence / absence detection means and the traveling distance detection means, wherein the grain stalk presence / absence detection means As the traveling distance detected by the traveling distance detecting means reaches the set distance after detecting the presence, only the one at the base of the pair of ear tip position detecting means maintains the state of detecting the presence of grain culm. In order to start the handling depth control operation for operating the handling depth adjusting means, and as the traveling distance reaches a set distance after the grain stalk presence / absence detecting means detects the absence of grain culm, the handling depth is controlled. Stop control operation Depth control means about the threshing depth control device of the combine provided is.

[0002]

2. Description of the Related Art In the above-described apparatus for controlling the depth of a combine, the depth-of-treating means includes a pair of tip sensors arranged at intervals in the direction of the culm of the grain to detect the position of the tip of the grain. It is arranged so as to adjust the handling depth at a location on the upstream side in the transport direction of the grain culm than the installation location of the tip position detection means consisting of, based on information of the pair of tip position detection means, Only the sensor on the stock side of the tip sensor detects the presence of grain culm and the sensor on the tip side detects absence of grain culm, that is, the condition where the tip of grain culm is located at the middle position between both tip sensors is appropriate. The handling depth adjusting means is operated to adjust the operating depth so as to maintain the state.

Conventionally, a means for detecting the presence or absence of a grain culm of a transported grain culm, which is installed in a grain culm transport path, for detecting whether a combine is being harvested or not is installed. When the handling depth control operation is started before the grain culm is conveyed from the point to the installation position of the tip position detection means installed on the lower side in the conveyance direction, the detection position of the tip position detection means In order to avoid inconvenience, the handling depth adjustment is performed in a state where the grain culm does not reach the grain culm. Is detected, the travel distance detected by the travel distance detection means is set to the distance traveled by the combine during the time required for the grain culm to be transported from the position of the grain stalk presence / absence detection means to the position of the tip position detection means. Is With the reaches the set distance, was to initiate the threshing depth control operation. Note that the sub-transmission device for traveling is designed to perform a speed change operation between a standard transmission state and a lower-down state at a lower speed during a mowing operation. The traveling distance of the combine required for the grain stalk to be conveyed from the position of the grain stalk presence / absence detecting means to the position of the spike position detecting means in the state of shifting to the speed change state is set.

On the other hand, at the end of the harvesting operation, the control operation is performed in consideration of the fact that a detection signal may be intermittent in a sensor such as a stock sensor that detects the presence or absence of a grain stem. In order to stabilize, the handling depth control operation is stopped when the traveling distance of the combine reaches the set distance after the absence of the grain stalk is detected by the grain stalk presence / absence detecting means. Accordingly, when the traveling auxiliary transmission is shifted to the down state, the traveling distance detected after the grain stalk presence / absence detecting means detects the absence of the grain culm reaches the set distance before the traveling distance detected reaches the set distance. All of the grain culm in the middle of the route has passed through the installation position of the pair of tip position detecting means, so that the pair of tip position detecting means both detect the absence of grain culm and are judged to be in a shallow handling state. The handling depth adjusting means is adjusted to the deep handling side, and the handling depth control operation is stopped in a state where the handling depth adjusting means is adjusted to the deep handling side as the set distance is reached. For this reason, at the start of the next harvesting operation, since the handling depth state is stopped in the deep handling state at the end of the previous harvesting operation, the harvested grain culm with a short culm is transported. Was able to avoid the occurrence of a shallow handling state as much as possible.

[0005]

However, according to the above-mentioned prior art, when the traveling auxiliary transmission is being shifted to the down position, the cereal stalks reach the installation position of the ear tip position detecting means at the start of the harvesting operation. Despite being conveyed, since the traveling distance detected by the traveling distance detection means does not reach the set distance, the handling depth control operation is not started, and the activation of the handling depth control is delayed. Was.
And in that case, the handling depth is not properly adjusted for the grain culm conveyed until the detected traveling distance reaches the set distance and the handling depth control operation is started. And, as described above, at the end of the previous reaping operation, it is stopped in a deep handling state, so when a long grain culm is transported, it becomes an extremely deep handling state and a threshing device etc. In the worst case, there is a risk that clogging of the culm may occur in a threshing device or the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to solve the above-mentioned disadvantages by cutting the gears when the traveling auxiliary transmission is shifted to a low-speed falling state. An object of the present invention is to minimize a malfunction (particularly, an extremely deep handling state) of adjusting the handling depth due to a delay in activation of the handling depth control operation at the start of work.

[0007]

The feature of the combine depth control device according to the present invention is that the handle depth control means detects the presence or absence of a grain culm by the grain culm detection means so that the traveling distance is reduced. If the pair of ear position detecting means both detect the presence of a grain stalk before reaching the set distance, the handling depth control operation is started.

[0008]

According to the characteristic structure of the present invention, even when the traveling distance detected by the traveling distance detecting means at the start of the mowing operation does not reach the set distance, both of the pair of tip position detecting means detect the presence of grain culm. If so, the handling depth control operation is started, so when the traveling auxiliary transmission is operated to shift to a low-speed falling state, for example, a long grain culm with a culm,
As described above, at the end of the previous mowing operation, when the transport is performed in a state where the handling depth adjustment is adjusted to the deep handling side and stopped, the pair of ear position detection means have both grain culm. Is reliably detected, so that the handling depth control operation is started without delay in response to the grain culm being transported to the installation position of the tip position detecting means.

[0009]

Therefore, according to the characteristic structure of the present invention, even when the traveling auxiliary transmission is being shifted to a low-speed falling state, the starting of the handling depth control operation at the start of the mowing operation is performed. The delay can be effectively prevented so that poor adjustment of the handling depth at the start of mowing (particularly in an extremely deep handling state) can be minimized, so that a more convenient handling depth control device can be obtained.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 3, the combine is configured such that a cutting unit B is vertically swingably mounted on a front portion of an airframe A including a pair of left and right crawler traveling devices 1, a threshing device 2, and a driver's seat 3. Have been.

The cutting section B includes a raising device 4 for raising the planted grain culm, a cutting blade 5 for cutting the root of the raised grain culm, and an auxiliary for collecting the cut and harvested grain culm and transporting it to the rear. The transporting device 6 includes a vertical transporting device 8 that transfers the harvested grain culm to the threshing feed chain 7 of the threshing device 2 while gradually turning over the transported harvested culm. That is, the vertical transport device 8 corresponds to a transport device that transports the cut culm to the threshing device 2.

In the figure, S0 is a starting point of the vertical conveying device 8 for detecting the presence or absence of a grain culm conveyed by the vertical conveying device 8 by abutting against the root of the harvested grain culm. It is a sensor. In addition, during the harvesting operation, the state that the harvested grain culm contacts the stock sensor S0 and the stock sensor S0 is turned on continues, and the supply of the harvested grain culm stops when the harvesting work is completed. Therefore, the grain stem does not contact the stock sensor S0, and the stock sensor S0 is turned off. Therefore, this stock sensor S0 corresponds to a grain stalk presence / absence detecting means for detecting the presence / absence of a grain stalk.

As shown in FIGS. 1 and 2, the vertical transport device 8 includes a clamping transport device 8A which clamps and transports the root side of the harvested grain culm and a latch which latches and transports the tip side of the harvested grain culm. It consists of a transport device 8B and a grain culm guide plate 8C, transports the harvested grain culm from the auxiliary transport device 6 toward the rear of the machine in a vertical posture, and changes the posture to a sideways posture at a transport end portion to thresh. It is configured to be delivered to the feed chain 7.

The vertical conveying device 8 is pivotally mounted at the end portion so as to freely swing up and down around a horizontal axis P, and the cutting grain supplied from the auxiliary conveying device 6 with the vertical swing. The support position of the culm is changed in the direction of the culm, the position of the harvested cereal culm transferred from the vertical transport device 8 to the threshing feed chain 7 is changed in the culm direction, and the handling depth in the threshing device 2 is reduced. It is configured to be changed and adjusted.

The swing operation structure of the vertical transfer device 8 will be described. As shown in FIG. 1, an electric motor M as an actuator for adjusting the handling depth is provided, and can swing around the horizontal axis Q. A rack 11 is attached to the arm 14, and the pinion 12 engaging with the rack 11 is connected to the electric motor M
Attached to the rotating shaft. In addition, the inverted U-shaped member 13 used also as a frame of the vertical transport device 8 and the arm 14
Are interlockingly connected via a push-pull rod 15, whereby the electric motor M is operated in forward and reverse rotations,
The vertical transport device 8 is configured to swing up and down. Therefore, the vertical transport device 8, the push / pull rod 15, the arm 14,
The electric motor M and the like constitute a handling depth adjusting means C for adjusting the handling depth in the threshing device 2.

As shown in FIGS. 1 and 2, a pair of heads as a pair of head position detecting means for detecting the position of the head of the grain culm in the conveying path of the cereal culm conveyed by the vertical conveying device 8. Sensors S1 and S2 are provided at intervals in the direction of the culm of the grain culm, and the pair of head sensors S1 and S2 are provided.
Is set to be on the lower side in the grain stalk transport direction than the handling depth adjustment location by the handling depth adjustment means C and the installation location of the stock sensor S0. Each of the pair of tip sensors S1 and S2 reciprocates and swings backward in the transport direction due to contact with the grain culm, and is urged to return to the upward direction in the transport direction. And a detection unit 17 using a switch for detecting the That is, if the sensor lever 16 retreats and swings due to contact with the grain stalk and the detection unit 17 is turned ON, the presence of the grain stalk is detected, and if the detection unit 17 is OFF, the absence of the grain stalk is detected.

Next, the power transmission system of the combine will be described. As shown in FIG. 4, the output of the engine E is transmitted to the threshing apparatus 2 through a belt tensioning threshing clutch 10 and the belt transmission. The power is transmitted to a hydraulic continuously variable transmission 9 as a traveling main transmission via a mechanism. Reference numeral 20 denotes a threshing clutch lever for manually turning on and off the threshing clutch 10. The output of the continuously variable transmission 9 after shifting is transmitted to the transmission case 18, and the pair of left and right crawler traveling devices 1 is transmitted to the transmission sub-transmission (see FIG. 5) described later in the transmission section 18. And the output of the continuously variable transmission 9 after shifting is controlled by the one-way clutch 2 so that the reaper B is driven only when the machine body is moving forward.
1 and is also transmitted to the reaping unit B to drive each unit of the reaping unit B. As a result, the vertical conveying device 8 is driven by the output of the continuously variable transmission 9, and the grain culm conveying speed is changed and adjusted according to the output.

The main part of the transmission case 18 will be described. As shown in FIG. 5, the power from the output shaft 30 of the continuously variable transmission 9 is transmitted to the first
The power is transmitted to the mowing part B via the transmission shaft 31 and the power from the first transmission shaft 31 is transmitted to the first gear 32 and the second gear 32.
The power is transmitted to the second transmission shaft 34 via the gear 33. A shift gear 35 is externally slidably fitted to the second transmission shaft 34 in a spline structure.
6, a high-speed gear 37, a medium-speed gear 38, and a low-speed gear 39 are fixed. Then, by sliding the shift gear 35 to engage the second high-speed gear 41 with the high-speed gear 37, or by switching and engaging the shift gear 35 with the medium-speed gear 38 or the low-speed gear 39, respectively, the third transmission shaft is engaged. The forward rotation power for straight traveling transmitted to 36 is transmitted to the pair of left and right crawler traveling devices 1 after being shifted to three stages of high, medium and low. With the structure described above, the traveling auxiliary transmission D that changes the output from the continuously variable transmission 9 as the traveling main transmission is driven by the shift gear 35, the high-speed gear 37, the medium-speed gear 38, the low-speed gear 39, and the like. Be composed.

The transmission mechanism from the third transmission shaft 36 to the pair of left and right crawler traveling devices 1 will not be described in detail. However, in the middle of the transmission mechanism, the left and right crawler traveling devices 1 A pair of left and right traveling clutches for operating the power in and out of each is provided. Further, a rotating body 40 is attached to the third transmission shaft 36,
A distance sensor S3 is provided for detecting the number of revolutions of the rotating body 40 and detecting the traveling distance based on the number of revolutions (by integrating the pulses output according to the number of revolutions). That is, the distance sensor S3 corresponds to a traveling distance detecting means for detecting the traveling distance based on the rotation speed of the rotating body 40 driven and rotated by the output of the traveling auxiliary transmission D. However, as described above, the reaping unit B is driven only during forward movement of the machine body via the one-way clutch 21. Therefore, the drive of the vertical transport device 8 is stopped during backward movement of the machine body. Therefore, the distance sensor S3
Is measured only when the aircraft is moving forward, and is stopped when the aircraft is moving backward. Although not shown,
A vehicle speed sensor for detecting a vehicle speed based on the rotation speed of the rotating body 40 is provided.

As shown in FIG. 1, a control device H using a microcomputer is provided.
The stock sensor S0, the pair of head sensors S1,
Signals from S2 and the distance sensor S3 are input, as well as signals from a threshing switch 19 that is turned ON in accordance with the on operation of the threshing clutch lever 20 and a handling depth control start command switch 22. . The control device H outputs a drive signal to each of the drive circuit 18 of the electric motor M and the alarm device 24. The alarm device 24 includes a buzzer provided in the driver's seat 3 and a blinking lamp.

Using the control device H, after the stock sensor S0 detects the presence of grain culm based on the information of the pair of head sensors S1 and S2, the stock sensor S0 and the distance sensor S3. As the travel distance detected by the distance sensor S3 reaches the set distance, the handling is performed so as to maintain a state in which only the stock side sensor S2 of the pair of head sensors S1 and S2 detects the presence of grain culm. A handling depth control operation for operating the depth adjusting means C is started, and the handling depth control operation is performed as the running distance reaches a set distance after the stock sensor S0 detects no grain culm. Stopping depth control means 100 is configured. In addition, the handling depth control means 100 detects that both the pair of head sensors S1 and S2 have grain culm before the running distance reaches the set distance after the stock sensor S0 detects the grain culm. Also in such a case, it is configured to start the handling depth control operation. Note that the electric motor M
The vertical transport device 8 is vertically swung by outputting a drive signal to the vertical transport device 8. When the vertical transport device 8 swings downward, the vertical transport device 8 is adjusted to the deep handling side, and when the vertical transport device 8 swings upward, the vertical transport device 8 is adjusted to the shallow handling side. .

Next, the control operation of the control device H will be described with reference to the flowcharts shown in FIGS. A state where the handling depth control start command switch 22 is ON and the threshing clutch lever 20 is turned on and the threshing switch 19 is ON is set to a state where the control condition is satisfied. Check whether the control condition is satisfied. If the control condition is satisfied, the state of the stock sensor S0 is checked. If the control condition is ON, it is determined that the harvesting operation is being performed.
The distance sensor S3 detects whether or not the vehicle has traveled the set distance after changing to the N state. When both the pair of tip sensors S1 and S2 are in the ON state even when the vehicle is traveling the set distance and when the vehicle is not traveling the set distance, the control activation flag of the handling depth control is set. set. The set distance is such that when the traveling auxiliary transmission D is shifted to a medium speed, that is, a standard state, the cereal stem is moved from the installation position of the stock sensor S0 to the pair of head sensors S.
The distance traveled while being transported to the installation location of S1 and S2 is set.

In the above, the stock sensor S0 is OF
In the F state, it is determined that the harvesting operation has been completed. However, even if the stock sensor S0 is turned off, the grain culm in the middle of the conveyance of the vertical conveyance device 8 reaches the installation position of the pair of head sensors S1 and S2. Until the sheet is conveyed, in order to maintain the control state, the distance sensor S0 further determines whether or not the stock sensor S0 has traveled the set distance after changing from the ON state to the OFF state.
3 to detect. Then, the control start flag is cleared only when the vehicle is traveling the set distance. Then, according to the state of the flag, if the flag is set, the depth control is executed, while if the flag is cleared, the depth control is not executed.

The handling depth control will be described with reference to the flowchart shown in FIG. 7. When the lower spike sensor S2 on the stock side is ON and the upper spear sensor S2 on the spike side is OFF. Since the processing depth is appropriate, the processing depth adjustment is stopped after a predetermined delay time has elapsed, and the processing depth state is maintained. Also, the lower tip sensor S on the stock side
2 is in the ON state, and when the spike-side upper spike sensor S2 is in the ON state, it is located on the deep handling side,
After the elapse of the delay time, the handle depth is adjusted to the shallow side. The delay time is determined by the head sensors S1 and S2.
In order to prevent the ON / OFF operation being repeated within a short period of time and the handling depth adjusting operation to be in an unstable (hunting) state, the tip position of the grain culm is predetermined from the detection positions of the tip sensors S1 and S2. Although the distance is set to be large, the delay time is set to be sufficiently shorter than the travel time required to travel the set distance.

On the other hand, when the lower head sensor S2 on the stock base side of the pair of head sensors S1 and S2 is in the OFF state and the upper head sensor S1 on the head side is in the OFF state, the sensor is located on the shallow handle side. After the delay time has elapsed, the handle depth adjustment is operated to the deep handle side, but the lower tip sensor S2 on the stock side is in the OFF state and the upper tip sensor S2 on the tip side is in the ON state. In some cases, it is determined that a foreign matter such as a floating straw is clogged, the control operation is immediately stopped, and the alarm device 24 is operated to notify that the floating straw or the like is occurring.

With the above arrangement, when the traveling auxiliary transmission D is shifted at a low speed, that is, in the downturn state, the traveling distance detected by the distance sensor S3 after the harvesting operation is completed and the stock sensor S0 is turned off. Before reaching the set distance, all of the grain culms in the middle of transportation by the vertical transportation device 8 pass from the installation location of the stock sensor S0 to the installation location of the pair of head sensors S1 and S2, and Both the tip sensors S1 and S2 detect the OFF state, that is, the absence of a grain culm, and determine the state of shallow handling, so that the handling depth adjustment is operated toward the deep handling side. For this reason, when the next harvesting operation is started after the traveling auxiliary transmission D is shifted to the lying state, the handling depth state is stopped in the deep handling state at the end of the previous harvesting operation. Even if does not reach the set distance, it is reliably detected that both ear sensors S1 and S2 are both ON, and the control operation can be started without delay.

[Alternative Embodiment] In the above-described embodiment, the traveling main transmission 9 is constituted by a hydraulic stepless transmission. However, the present invention is not limited to the hydraulic type. It may be. Further, the traveling auxiliary transmission device D is also provided with three stages of high, medium and low, but is not limited thereto, and may be provided with two stages.

In the above embodiment, the pair of spike tip position detecting means S1 and S2 are detected in a vertical posture at the vertical transport device 8 for transporting the grain culm. The grain stalk may be detected in a horizontal posture on a placement guide plate or the like that receives and guides the grain stalk ear tip side portion toward the receiving port. Further, although the pair of ear position detecting means S1 and S2 and the grain stalk presence / absence detecting means S0 are configured by switches that detect the contact type, a photoelectric sensor or the like that detects the contact type may be used.

In the above embodiment, the handling depth adjusting means C
Is configured so as to adjust the handling depth by swinging the vertical transport device 8 up and down. However, the present invention is not limited to this. For example, the feed chain 7 may be moved in parallel with the threshing device 2.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[0031]

[Brief description of the drawings]

FIG. 1 is a block diagram of a control configuration.

FIG. 2 is a front view of a tip position detecting means.

FIG. 3 is a side view of the front of the combine.

FIG. 4 is a power system diagram of the combine.

FIG. 5 is an explanatory diagram of a main part of a transmission.

FIG. 6 is a flowchart of a control operation.

FIG. 7 is a flowchart of a control operation.

[Explanation of symbols]

 2 Threshing device 8 Conveying device 9 Main transmission device for traveling 40 Rotating body 100 Control means C Handling depth adjusting device D Secondary transmission device for traveling S0 Grain stalk presence / absence detection means S3 Travel distance detection means S1, S2 Ear position detection means

Claims (1)

(57) [Claims] A traveling device (8) provided with a traveling main transmission (9) and a traveling auxiliary transmission (D) for shifting the output therefrom, and transporting the harvested grain culm to a threshing device (2). Is provided so as to be driven by the output of the traveling main transmission (9), and detects a tip position of a grain culm in a conveyance path of a grain culm conveyed by the conveyance device (8). Ear tip position detecting means (S1, S2) are provided at intervals in the culm direction of the grain culm, and the grain culm presence / absence detecting means (S0) for detecting the presence or absence of a grain culm in the conveying route is provided by the pair A handle depth adjusting means (C), which is provided on the upstream side in the transport direction with respect to the tip position detecting means (S1, S2) and adjusts the handling depth in the threshing device (2), detects the pair of tip position positions. Means (S1,
The auxiliary speed change device for traveling (D) is provided so as to adjust the handling depth on the side closer to the grain culm transport direction than the installation position of S2).
A traveling distance detecting means (S3) for detecting a traveling distance based on the number of revolutions of the rotating body (40) driven and rotated by the output of the pair is provided, and the pair of tip position detecting means (S1, S) is provided.
2) Based on the information of the grain stalk presence / absence detection means (S0) and the travel distance detection means (S3), the travel distance detection means (S0) after the grain stalk presence / absence detection means (S0) detects the presence of grain culm. As the travel distance detected by S3) reaches the set distance, the pair of ear tip position detection means (S1,
In S2), the handling depth control operation for operating the handling depth adjusting means (C) is started so as to maintain the state where only the stock side detects the presence of the grain stalk, and the presence or absence of the grain stalk is detected. After the means (S0) detects that there is no grain culm, the handle depth control means (100) provided with the handle depth control means (100) for stopping the handle depth control operation as the travel distance reaches a set distance. An apparatus, wherein the handling depth control means (100) detects the presence of grain culm by the grain culm presence / absence detection means (S0), and before the traveling distance reaches a set distance, the pair of head position detection means. (S1,
A combine depth control device configured to start the depth control operation when both of them detect the presence of a grain culm.