JP2015062366A - Versatile combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage of a ground sensor caused by forget of housing, and to reduce operation load of an operator by dispensing with manual housing operation of the ground sensor.SOLUTION: In a versatile combine harvester 1, a reaping unit 2 is provided with a ground sensor 19 for detecting a ground height of the reaping unit 2. The versatile combine harvester 1 includes driving means (motor 28 for the ground sensor) for switching the position of the ground sensor 19 between a working position capable of detecting the ground height of the reaping unit 2 and a housed position where the reaping unit 2 is retracted upward from the working position. In response to the detection of stop or rearward motion of a machine frame, the position of the ground sensor 19 is automatically switched to the housed position.

Description

  The present invention relates to a general-purpose combine provided with a grounding sensor for detecting a ground height of a cutting part.

  There is known a general-purpose combine provided with a grounding sensor for detecting a ground height of a cutting part at a cutting part connected to the front part of the machine body so as to be movable up and down. For example, the combine disclosed in Patent Documents 1 and 2 includes a sled-shaped grounding sensor that swings up and down with the front end as a fulcrum, and detects the vertical swinging position of the grounding sensor according to the ground height of the cutting part with a potentiometer. Is configured to do.

  Moreover, the combine shown by patent document 1, 2 is provided with the ground height switching lever which switches the up-and-down swing position of a grounding sensor, and in the situation where ground height detection is unnecessary, operation of the ground height switching lever is possible. Basically, the ground sensor can be stored in a position where it is not grounded.

Japanese Patent No. 3822856 JP 2010-246410 A

  However, in the combine shown in Patent Documents 1 and 2, even if the ground sensor should be stored, if the storage operation using the ground height switching lever is forgotten, the ground sensor may be damaged. For example, if the aircraft is moved backward with the cutting part lowered during work traveling, the ground sensor may be caught on the ground and damaged.

The present invention has been created in order to solve these problems in view of the above circumstances, and the height of the cutting part to the ground is set to the cutting part connected to the front part of the machine body so as to be movable up and down. A general-purpose combine provided with a grounding sensor for detecting, comprising a driving means for switching the position of the grounding sensor between a working position capable of detecting the height of the cutting unit with respect to the ground and a storage position retracted upward from the working position, The position of the ground sensor is automatically switched to the storage position based on detection of stop or reverse.
The drive means is a dedicated electric motor for switching the position of the ground sensor.
Further, it is characterized in that work travel and road travel are discriminated, and when the road travel is discriminated, the position of the ground sensor is automatically switched to the storage position.
In addition, when the height of the cutting unit with respect to the machine is equal to or higher than a predetermined height, the position of the grounding sensor is not switched to the storage position even if the machine is stopped or moved backward.
Further, the drive means is a mowing clutch drive motor that automatically disconnects the mowing clutch based on detection of airframe stop or reverse.

According to the first aspect of the present invention, since the position of the ground sensor is automatically switched to the storage position based on the detection of the airframe stop or reverse, not only can the ground sensor be prevented from being damaged, but also the manual storage operation of the ground sensor can be performed. This eliminates the need to reduce the operator's operational burden.
According to the invention of claim 2, since the position of the ground sensor is switched by the dedicated electric motor, the position of the ground sensor can be switched under various conditions.
Further, according to the invention of claim 3, when traveling on the road is determined, the position of the grounding sensor is automatically switched to the storage position when the road traveling is determined. It is possible to prevent the ground sensor from being damaged due to contact with the ground.
Further, according to the invention of claim 4, when the machine height of the cutting part is equal to or higher than a predetermined height, the position of the ground sensor is not switched to the storage position even if the aircraft is stopped or reversely detected. Therefore, it is possible to reduce useless storing operation of the ground sensor and improve the durability of the driving means.
According to the invention of claim 5, since the position of the grounding sensor is switched using the reaping clutch drive motor, the cost can be reduced as compared with the case where a dedicated electric motor for switching the position of the grounding sensor is provided.

It is a whole side view of a general purpose combine. It is a power transmission system diagram of a general purpose combine. (A) is a schematic side view which shows a grounding sensor, (B) is a schematic plan view. (A) is a side view showing a ground sensor position switching mechanism, (B) is a plan view. It is a block diagram which shows the input / output of a control part. It is a flowchart of ground sensor control. (A) is a side view which shows the first half part of the grounding sensor position switching mechanism based on 2nd Embodiment, (B) is a top view. (A) is a side view which shows the second half part of the grounding sensor position switching mechanism based on 2nd Embodiment, (B) is a top view. It is a flowchart of clutch control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a general-purpose combiner, and the general-purpose combine 1 is selected by a harvesting unit 2 that cuts off the stems and a threshing unit 3 that threshs and sorts the grains from the stems that are put into the whole straw. A grain tank 4 for storing grains, a discharge auger 5 for discharging the grains in the grain tank 4 to the outside of the machine, a post-processing unit 6 for post-processing the threshed waste, and an operator board the board. A driving unit 7 and a crawler type traveling unit 8 are provided.

  As shown in FIG. 2, the general-purpose combiner 1 includes an engine 9 that outputs running power and work power. The power of the engine 9 is a cutting unit 2, a threshing unit 3, a discharge auger 5, and a post-processing unit 6. And transmitted to the traveling unit 8. A threshing clutch 10 is interposed in the power transmission path from the engine 9 to the threshing section 3, and a cutting clutch 11 is interposed in the power transmission path from the threshing section 3 to the reaping section 2. The threshing clutch 10 and the mowing clutch 11 are both belt tension type clutches and are turned on / off by the power of the mowing / clutching motor 12.

  As shown in FIGS. 1 to 3, the cutting unit 2 includes a header 13 that is connected to the front end of the machine body so as to be movable up and down, a divider 14 that weeds uncut stems at the front end of the header 13, and uncut The cutting blade 15 that cuts off the stems, the reel 16 that scrapes the uncut stems and cut stems, the auger 17 that collects the scraped stems at a predetermined position in the width direction, and the auger 17 It is configured to include a feeder 18 that transports the stem pods toward the threshing unit 3 and throws the whole culm into the handling chamber 3 a of the threshing unit 3, and a grounding sensor 19 that detects the ground height of the cutting unit 2.

  As shown in FIG. 3, the ground sensor 19 is provided at the bottom of the cutting unit 2. The cutting unit 2 of the present embodiment includes a pair of ground sensors 19 arranged on the left and right, but the number of ground sensors 19 may be one or three or more. The ground sensor 19 of the present embodiment has a warp shape, and a front end portion thereof is supported so as to be able to swing up and down via a support shaft 19a, and swings up and down according to the height of the cutting unit 2 with respect to the ground. Each grounding sensor 19 is connected to a potentiometer (not shown) for detecting the vertical swing position (vertical swing angle), and the detected value automatically controls the cutting height of the cutting unit 2. Used for automatic cutting height control.

  The automatic cutting height control of the general-purpose combine 1 is effective for crops such as soybeans with a low cutting height, and is not usually used when cutting crops such as rice and wheat with a high cutting height. In other words, when cutting the soybeans, if the cutting unit 2 thrusts into the ground, the mud is cut together to cause dirt, so automatic cutting height control is used to avoid this. Since the soybean field has straw, a wide ground sensor 19 is used.

  As shown in FIG. 4, a torsion coil spring 20 is provided on the support shaft 19a of the ground sensor 19, and one end thereof is engaged with a fixing member 21 and the other end is engaged with an arm 19b protruding from the support shaft 19a. The ground sensor 19 is urged downward (in the ground direction). A lower limit stopper pin 22a is disposed behind the arm 19b, and the swinging lower limit position of the ground sensor 19 is defined by the arm 19b coming into contact with the lower limit stopper pin 22a.

  As shown in FIG. 4, the ground sensor 19 is linked to a ground sensor position switching mechanism 23 that switches its position. The ground sensor position switching mechanism 23 of the present embodiment is configured to switch the swing lower limit position of the ground sensor 19, and specifically, the lower limit stopper pin 22a according to the rotation about the support shaft 19a. The stopper arm 22 that moves the position of the front and rear, the rotatable first intermediate arm 25a coupled to the stopper arm 22 via the first rod 24, the first intermediate arm 25a and the second intermediate arm 25b are integrated. A rotatable intermediate shaft 25, a sector gear 27 connected to the second intermediate arm 25 b via the second rod 26, and a ground sensor motor 28 for rotating the sector gear 27. .

  The ground sensor motor 28 is a dedicated electric motor for switching the position of the ground sensor 19, and when the ground sensor motor 28 is driven, a sector gear 27 that meshes with an output gear (not shown) of the ground sensor motor 28. It rotates around the support shaft 27a. When the sector gear 27 rotates, the lower limit stopper pin 22a connected through the second rod 26, the second intermediate arm 25b, the intermediate shaft 25, the first intermediate arm 25a, the first rod 24 and the stopper arm 22 is moved back and forth. The movement lower limit position of the ground sensor 19 is switched. At the switching position of the ground sensor 19 by the ground sensor position switching mechanism 23, at least the work position (the phantom line position in FIGS. 1 and 3) where the height of the cutting unit 2 can be detected and the upper position are retracted upward. Storage positions (solid line positions in FIGS. 1 and 3), a plurality of work positions can be set according to the cutting height of the cutting unit 2 and the type of crop to be harvested.

  The ground sensor position switching mechanism 23 is provided for each ground sensor 19, but it is preferable to simultaneously switch the positions of the plurality of ground sensors 19 with one ground sensor motor 28. For example, in the present embodiment, a ground sensor position switching mechanism 23 provided for each ground sensor 19 is connected via an intermediate shaft 25 and is driven simultaneously by a single ground sensor motor 28.

  As shown in FIGS. 1 and 5, the driving section 7 includes a driver seat 29 on which an operator is seated, a multi-steering lever 30 disposed in front of the driver seat 29, and a main transmission disposed on the left side of the driver seat 29. A lever 31, a cutting / clutching clutch on / off switch 32 provided on a switch panel (not shown), a harvested crop setting dial 33, a ground height setting dial 34, and the like are provided.

  The multi-steering lever 30 is a joystick-type lever operating tool that is also used as a steering operation tool (left / right operation) of the machine body and a lifting / lowering operation tool (front / rear operation) of the cutting unit 2. It is a lever operating tool capable of a continuously variable transmission operation, a reverse continuously variable transmission operation, and a body stop operation.

  The mowing detachment clutch on / off switch 32 is a switch for engaging / disengaging the threshing clutch 10 and the reaping clutch 11, and is turned on during work travel and turned off during road travel. The harvested crop setting dial 33 is a setting tool for setting the type of crop to be harvested. In this embodiment, rice, wheat, and soybean can be set. The ground height setting dial 34 is a setting tool for setting a target height for the above-described ground height control.

  As shown in FIG. 5, the general-purpose combine 1 is provided with a control unit 35 composed of a microcomputer or the like. On the input side of the control unit 35, in addition to the cutting / clutching clutch on / off switch 32, the harvested crop setting dial 33, and the ground height setting dial 34, main shift lever detection means for detecting the operation position of the main shift lever 31 is provided. 36 (for example, a potentiometer), a cutting unit height detecting means 37 (for example, a potentiometer) for detecting the machine height of the cutting unit 2, and the like are connected to the output side. (A control target of the second embodiment) and a ground sensor motor 28 are connected. Then, the control unit 35 drives and controls the ground sensor motor 28 in accordance with the state of the general purpose combine 1 and switches the position of the ground sensor 19. Hereinafter, a specific processing procedure of the ground sensor control executed by the control unit 35 will be described with reference to FIG.

  As shown in FIG. 6, in the ground sensor control, first, the type of crop to be harvested is determined based on the set position of the harvested crop setting dial 33 (S11). Specifically, it is determined whether or not it is a specific crop (for example, soybean) using the ground contact sensor 19 (automatic cutting height control), and here, it is other than the specific crop (for example, rice or wheat). If it is determined, the ground sensor motor 28 is driven to switch the position of the ground sensor 19 to the storage position (S12).

  On the other hand, when it is determined that the crop is a specific crop, it is determined whether the threshing clutch 10 is on / off based on the operation position of the cutting / clutching clutch on / off switch 32 (S13). Here, when the threshing clutch 10 is in the disengaged state, it is determined that the vehicle is traveling on the road, and the ground sensor motor 28 is driven to switch the position of the ground sensor 19 to the storage position (S12).

  On the other hand, when the threshing clutch 10 is in the engaged state, it is determined that the threshing clutch 10 is operating (reaping travel), and the traveling state is determined based on the detection value of the main transmission lever detecting means 36 (S14). If it is determined that the aircraft is in a forward traveling state, the ground sensor motor 28 is driven to switch the position of the ground sensor 19 to the working position (S15). At this time, in the present embodiment, the work position of the ground sensor 19 is determined based on the set values of the harvested crop setting dial 33 and the ground height setting dial 34.

  On the other hand, when it is determined that the traveling state is stop or reverse, the machine height of the cutting unit 2 is determined based on the detection value of the cutting unit height detection means 37 (S16). Here, when it is determined that the machine height of the cutting unit 2 is equal to or higher than the predetermined height, the ground sensor motor 28 is not driven and the position of the ground sensor 19 is maintained as it is (S17). On the other hand, when it is determined that the machine height of the cutting unit 2 is less than the predetermined height, the ground sensor motor 28 is driven to switch the position of the ground sensor 19 to the storage position (S12).

  According to the present embodiment configured as described, in the general-purpose combine 1 provided with the grounding sensor 19 for detecting the height of the cutting unit 2 to the ground, the cutting unit 2 connected to the front part of the machine body so as to be movable up and down. Drive means (ground sensor motor 28) for switching the position of the ground sensor 19 between a work position where the height of the cutting unit 2 can be detected and a storage position retracted upward from the work position is provided, and the machine body is stopped or moved backward. Based on this detection, the position of the ground sensor 19 is automatically switched to the storage position, so that not only can the ground sensor 19 be prevented from being damaged, but also the manual storage operation of the ground sensor 19 is not required, reducing the operator's operational burden. be able to.

  In this embodiment, since the position of the ground sensor 19 is switched by a dedicated electric motor (ground sensor motor 28), the position of the ground sensor 19 can be switched under various conditions.

  Further, in the present embodiment, the work traveling and the road traveling are discriminated, and when the road traveling is discriminated, the position of the grounding sensor 19 is automatically switched to the storage position. Therefore, even if the cutting unit 2 is lowered during the road traveling, the grounding sensor It can prevent that 19 contacts with the ground and is damaged.

  Further, in the present embodiment, when the height of the machine of the cutting unit 2 is equal to or higher than a predetermined height, the position of the ground sensor 19 is not switched to the retracted position even if the aircraft is stopped or reversely moved. The useless storing operation of the sensor 19 can be reduced, and the durability of the driving means can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIGS. However, the same reference numerals as those in the above embodiment are assigned to portions common to the above embodiment, and description thereof is omitted.

  According to the second embodiment of the present invention, clutch control for automatically disconnecting the cutting clutch 11 is executed based on the detection of the airframe stop or reverse, and the cutting clutch releasing clutch motor 12 (cutting clutch drive) used for the clutch control is executed. This is different from the above embodiment in that the position of the ground sensor 19 is switched using a motor. According to the second embodiment, there is an advantage that the cost can be reduced as compared with the case where a dedicated electric motor for switching the position of the ground sensor 19 is provided. Hereinafter, the on / off structure of the cutting clutch 11 and the position switching structure of the ground sensor 19 by the cutting / clutching motor 12 will be described with reference to FIGS. The mowing / clutching motor 12 also turns the threshing clutch 10 on and off, but the description and illustration regarding the on / off of the threshing clutch 10 are omitted.

  As shown in FIG. 7, the cutting clutch 11 applies a tension to the transmission belt 50 to enter the power transmission to the cutting unit 2 and the power transmission to the cutting unit 2 by relaxing the transmission belt 50. And a tension arm 51 that is swing-switched to a cutting position for cutting. The tension arm 51 is connected to a sector gear 54 via a rod 52 and an elastic telescopic rod 53, and the position of the tension arm 51 is switched by driving the sector gear 54 with the mowing / clutching motor 12. The elastic telescopic rod 53 receives the compressive force when the clutch is disengaged and maintains the most contracted state (the state where the stopper 53a and the spring case 53b abut), and when the clutch is engaged, the elastic telescopic rod 53 is energized by the urging force of the spring 53c. The tension arm 51 is elastically pulled to urge the tension arm 51 toward the entry side.

  As shown in FIG. 8, in the second embodiment, the stopper arm 22, the first rod 24, the first intermediate arm 25a, the intermediate shaft 25, and the second intermediate arm 25b are provided, and the second intermediate arm 25b is a rod. It is connected to the rod 52 via 55. In this way, when the cutting and detaching clutch motor 12 pushes the rod 52 forward to disengage the cutting clutch 11, the rod 55, the second intermediate arm 25b, the intermediate shaft 25, the first intermediate arm 25a, the first The lower limit stopper pin 22a connected via the 1 rod 24 and the stopper arm 22 moves forward, and the position of the ground sensor 19 is switched to the storage position. Hereinafter, clutch control of the second embodiment will be described with reference to FIG.

  As shown in FIG. 9, in the clutch control, first, ON / OFF of the mowing / disengaging clutch on / off switch 32 is determined (S21). When the determination result is OFF, the sector gear 54 is moved to the initial position (the mowing clutch is disengaged, In order to switch to threshing clutch cutting), the mowing / clutching motor 12 is driven (S22).

  On the other hand, when the cutting / clipping clutch on / off switch 32 is ON, the traveling state is determined based on the detected value of the main transmission lever detecting means 36 (S23). Here, when it is determined that the airframe is stopped or in reverse, the mowing / clutching motor 12 is driven to switch the sector gear 54 to the intermediate position (cutting clutch disengaged, threshing clutch engaged) (S24).

  On the other hand, when the aircraft is in the forward movement state, the height of the cutting unit 2 with respect to the cutting unit 2 is determined based on the detection value of the cutting unit height detection means 37 (S25). Here, when it is determined that the machine height of the cutting unit 2 is less than the predetermined height, the cutting / clutching motor 12 is driven to switch the sector gear 54 to the end position (with the cutting clutch and the threshing clutch). (S26). On the other hand, when it is determined that the machine height of the cutting unit 2 is equal to or higher than the predetermined height, the cutting / clutching motor 12 is driven to switch the sector gear 54 to the intermediate position (cutting clutch cut off and threshing clutch included). (S24).

DESCRIPTION OF SYMBOLS 1 General-purpose combine 2 Cutting part 10 Threshing clutch 11 Cutting clutch 12 Cutting / clutching motor 19 Grounding sensor 23 Grounding sensor position switching mechanism 28 Grounding sensor motor 35 Control part

Claims (5)

In a general-purpose combine equipped with a grounding sensor that detects the ground height of the cutting part to the cutting part that is connected to the front part of the machine body so as to be movable up and down,
Drive means for switching the position of the grounding sensor between a working position capable of detecting the ground height of the cutting part and a storage position retracted upward from the working position, and based on the detection of the stop or reverse of the body, General-purpose combine that automatically switches the position of the storage to the storage position.   The general-purpose combine according to claim 1, wherein the drive means is a dedicated electric motor for switching the position of the ground sensor.   The general-purpose combiner according to claim 2, wherein work traveling and road running are discriminated, and when the road running is discriminated, the position of the ground sensor is automatically switched to the storage position.   4. The position of the grounding sensor is not switched to the storage position even when the aircraft is stopped or reversely moved when the height of the cutting unit is greater than or equal to a predetermined height. General purpose combine.   2. The general-purpose combine according to claim 1, wherein the driving means is a cutting clutch drive motor that automatically disconnects the cutting clutch based on the detection of the body stop or the reverse.

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