JPS6121042B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a sensor that detects the height of a reaping section above the ground through contact with a stump, and an operating section of a drive mechanism for raising and lowering the reaping section, based on the detection result of the sensor. and a linkage mechanism configured to automatically operate the operating unit so that the reaping unit level is within a set range, and a device for adjusting the vertical position of the sensor relative to the machine body is provided in the linkage mechanism. Regarding reaping and harvesting machines.

The above-mentioned reaping/harvesting machine is designed so that even if the machine body pitches, the level of the cutting section is maintained within a set range, allowing work to be carried out while keeping the cutting height almost constant. When the running speed was changed, the sensor detection results changed even for stumps at the same level, causing a problem in which control accuracy decreased. This is because, as the sensor passing speed increases, the degree of deflection deformation caused by the sensor's pressure on the stump becomes smaller, and the amount of downward movement of the sensor due to the stump deflection decreases.
This is because the amount of descent of the sensor changes as the aircraft traveling speed changes. In view of the above-mentioned circumstances, the present invention has been devised to make it possible to reliably and easily perform control correction to prevent the mowing height from changing even if the amount of descent of the sensor changes due to changes in the traveling speed of the machine. The purpose is to enable work to be carried out efficiently while accurately controlling the cutting height even if the traveling speed is changed.

Next, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, a threshing section 2 is provided on a self-propelled machine base equipped with a crawler traveling device 1, and a device 3 for raising planted grain culms as the machine moves, and a device 3 for raising and reaping grain culms. A combine harvester is constructed by connecting the device 4 and a reaping section 6 equipped with a conveying device 5 for supplying the harvested grain culm to the threshing section 2 to the self-propelled machine stand.

The reaping section frame 7, which connects the reaping section 6 to the self-propelled machine stand, is constructed so that it can be vertically swung around the axis _P1 by a fluid pressure cylinder 8, and thus, by the operation of the cylinder 8, The reaping section 6 can be raised and lowered.

In the reaping section 6, as shown in FIG.
In order to detect the height of the reaping section 6 relative to the stump, a stump sensor 9 configured to contact and follow the end surface of the stump of the grain culm cut by the reaping device 4 is swung by a bracket 10 extending from the reaping section frame 7. It is installed so that it can be raised and lowered by a moving link mechanism 11, and
It is biased downward by a spring 12. As shown in FIG. 2, the operating member 14, which is swingable around the axis _P2 of the cylinder 8 relative to the control valve 13, is biased by the spring 15 to the reaping part raising operating position, and the operating wire 1
6, the swing link 11a of the link mechanism 11
The sensor 9 and the control valve 13 are linked so that the valve 13 is automatically operated based on the detection result by the sensor 9, and the level of the cutting section 6 relative to the stump is controlled regardless of pitching of the machine. is maintained within a set range. That is, the reaping part frame 7 of the sensor 9
When the installation height is at the set height, spring 1
The control valve 13 is maintained at the neutral position due to the balance between the biasing force of 5 and the descending force of the sensor 9, and when the mounting height becomes higher than the set height,
The spring 15 operates the control valve 13 to the reaping part up position, and when the mounting height becomes lower than the set height, the control valve 13 is operated to the reaping part lowering position by the downward force of the sensor 9.

The locking member 17 for the operating member 14 is attached to the rotating shaft 18 for interlocking the operating member 14 and the control valve 13 in a relatively rotatable state and in a state in which it can be swingably operated by the swinging operating lever 19. , when the operating lever 19 is in the first operating position UP, the locking member 17 is in a position to lock the operating member 14 in the reaping part raised position;
When the operating lever 19 is operated to the second operating position N, the locking member 17 engages the operating member 14 to prevent it from being operated by the sensor 9 to the reaping part lowering position. When the operating lever 19 is operated to the third operating position DN or the fourth operating position AUT, the locking member 17 is moved from the swing range in which the operating member 14 is operated by the sensor 9 to raise and lower the reaping section. It is configured to be in a detached, non-active position. The operating lever 19
a pair of springs 20, 20 for biasing it to the second operating position N are connected to it, and
By locking the handle side portion of the operation lever 19 in the notch of the lever guide 21 by swinging the base end side portion, the lever 19 is moved to the fourth operation position.
It is configured to be fixed to the AUT so that the locking member 17 can be held in the non-operating position.

In the operating wire 16 for linking the operating member 14 and the sensor 9, a holding member 22 for the end of the outer wire located on the operating member 14 side is swingably attached to the support shaft 23, and the wire holding member 22 When the member 22 is swung,
The outer wire end portion approaches and separates from the operating member 14, and the wire holding member 2
The mounting height of the sensor 9 is changed by the swinging operation No. 2, so that the mowing height can be changed and set.

The wire holding member 22 and the traveling device 1
The gear transmission lever 25 of the gear transmission 24 capable of six-speed shifting is connected to the gear transmission lever 25.
It is shift fork 26a, 26b, 26c
The gear shift lever 25 is interlocked and connected by an interlocking plate 27 and an interlocking rod 28, which have elongated holes and are engaged so as to be pressed and slid in the direction of the swing only when the shift lever 25 is swung for selection. is the first forward speed position
F ₁ or from the second forward speed position F ₂ to the third forward speed position F ₃ or the fourth forward speed position F ₄ , and further,
From them to forward 5th gear position F ₅ or forward 6th gear position F 5
The wire holding member 22 is configured to swing in the direction of raising the mounting height of the sensor as the wire holding member 22 is sequentially operated to the speed position _F6 . That is, the gear transmission 24 and the wire holding member 2
2, when the transmission 24 is operated to increase the speed, the vertical position of the sensor 9 relative to the aircraft is raised higher than before the operation, and when the transmission 24 is operated to the deceleration side, the vertical position of the sensor 9 is raised higher than before the operation. sensor 9
By linking the vertical position relative to the machine body to lower, even if the machine running speed changes and the amount of descent caused by the bending deformation of the stump due to the pressing force of the sensor 9 changes, the actual cutting height can be changed. The vertical position of the sensor relative to the aircraft is automatically changed and adjusted so that it is almost the same as before.

By keeping the operating lever 19 at the fourth operating position AUT during work, even if the machine pitches, the sensor 9 will operate the control valve 13 to adjust the height of the cutting section 6 relative to the stump height. The mowing height is maintained within the set range, and even if the machine travel speed is changed, the vertical position of the sensor relative to the machine is automatically changed and adjusted, suppressing changes in the actual cutting height. This allows the cutting height to be maintained almost constant regardless of pitching of the machine or changes in running speed. When operating the aircraft to turn, move the operating lever 19 to the first position.
By operating the operating position UP, the reaping unit 6 can be artificially raised, and by operating the operating lever 19 to the second operating position N, the reaping unit 6 can be held in the raised position, and after the aircraft turns In this case, when the operating lever 19 is operated to the third operating position DN or the fourth operating position AUT, the reaping section 6 is activated by the sensor 9.
The machine is lowered to the working level and stopped.

Instead of the cylinder 8, a hydraulic or electric motor combined with a gear mechanism for raising and lowering the reaping section can be used, and these are collectively referred to as the drive mechanism 8 for raising and lowering the reaping section, and the control valve 13 is referred to as the operating section 13. collectively.

Instead of the wire 16 for linking the sensor and the valve, a mechanical structure consisting of links, rods, etc., or the detection results from the sensor can be electrically taken out.
An electric configuration is also used in which input is input to a controller to determine whether or not it is necessary to raise or lower the reaping section, and based on the determination result, the controller sends a drive or stop command to the operation section drive mechanism. These are collectively referred to as the linkage mechanism 16.

The gear transmission 24 can be changed to a belt-type or hydraulic-type continuously variable transmission configuration, and these are collectively referred to as the traveling transmission 24.

As a specific configuration for changing and adjusting the vertical position of the sensor with respect to the aircraft body, various configurations other than the outer wire operation configuration shown in the above embodiment can be adopted, and these are referred to as the vertical position adjustment device 22.

The interlocking configuration between the gear transmission and the wire holding member can be changed to an electric configuration similar to the electric configuration of the sensor and valve described above,
These are collectively referred to as link mechanisms 27 and 28.

The present invention can be applied to various types of reaping and harvesting machines that have different processing configurations for objects to be reaped, such as binders, and reaped materials.

In summary, the present invention, in the above-mentioned reaping and harvesting machine, operates the traveling transmission and the vertical position adjustment device such that the sensor is raised by increasing the speed of the traveling transmission and the sensor is lowered by deceleration. It is characterized by being linked by a linking mechanism like this.

In other words, even if the sensor 9 moves up and down due to the speed change, the actual mowing height is adjusted to the machine body according to the amount and direction of the displacement so that the actual cutting height is almost the same as before the speed change. Since the sensor installation height position is automatically corrected, changes in cutting height due to changes in the machine's running speed are reliably prevented. For example, even if the speed of the machine changes, it is now possible to control the cutting height with high accuracy, and to perform the work efficiently in that state.

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping/harvesting machine according to the present invention, and FIG. 1 is a side view of a combine harvester, FIG. 2 is a cylinder operation system diagram, and FIG. 3 is a plan view of an interlocking plate attachment part. 6...Reaping unit, 8...Drive mechanism, 9...Sensor, 13...Operation unit, 16, 27, 28...Linkage mechanism, 22...Change setting device, 24...Transmission device.

Claims (1)

[Claims] 1. A sensor 9 that detects the height of the reaping section 6 from the ground through contact with the stump end surface and an operating section 13 of the reaping section elevating drive mechanism 8 are connected to the reaping section based on the detection result by the sensor 9. 6 level is within a set range by a linking mechanism 16 configured to automatically operate the operating section 13, and a device 22 that adjusts the vertical position of the sensor 9 with respect to the aircraft with this linking mechanism 16. In the reaping/harvesting machine, the traveling transmission 24 and the vertical position adjustment device 22 are operated so that the sensor 9 is raised by increasing the speed of the traveling transmission 24, and the sensor 9 is raised by decelerating the traveling transmission 24.
A reaping harvester characterized in that the reaping and harvesting machine is linked by linking mechanisms 27 and 28 so as to lower the lower part.