JPS5837227Y2 - Combine long and short culm automatic adjustment device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic length and short culm adjustment device for a combine harvester.

Generally, a pair of detection devices are provided to detect the tips of the husk culms to be fed to the threshing device, and the inclination angle of the vertical conveyance device is changed based on the output of the detection device to adjust the handling depth of the husk culms. However, depending on the distance between the tilt displacement fulcrum of the vertical conveyance device and its conveyance end, the sum of the displacement amounts at the conveyance start end and conveyance end becomes the handling depth adjustment amount. If the handling depth is set based on the displacement at the end, the amount of displacement at the start end of the transport becomes an error, and the inclination angle of the vertical transport device constantly changes, resulting in a hunting operation.

Furthermore, it is well known that the appropriate rooting depth of the shell culm is determined by the specifications of the handling barrel of the threshing device, etc.; It was necessary to expand or reduce the appropriate width of the depth within an allowable range to prevent unhandled parts when the handling load was small.

Therefore, by changing the relative interval (dead band width) between the pair of detection devices that detect the tip of the ear, the optimum handling depth width can be obtained depending on the properties of the ear, and the width of the handling depth can be adjusted from the beginning of the conveyance to the end of the conveyance of the vertical conveyance device. By matching the time required for the culm to move (approximately constant) and the time required to adjust the inclination angle of the vertical conveyance device (drive speed of the actuator), hunting operation of the vertical conveyance device can be prevented. It's something you get.

However, when the drive speed of the actuator is approximately constant,
Dead band width (handling depth width), which is the relative spacing between a pair of detection devices
By changing , the inclination angle adjustment time of the vertical conveyance device changes, which has the drawback of causing a hunting operation of the vertical conveyance device.

The present invention completely eliminates the above-mentioned drawbacks, and is equipped with a pair of detection devices that detect the tip of the culm, and which changes the inclination angle of the vertical conveyance device via an actuator. In the combine harvester installed in the shell culm conveyance path leading to the culm, the respective detection devices are supported so that the relative spacing thereof can be adjusted, and the driving speed of the actuator is increased in conjunction with an operation to increase the relative spacing of each detection device. , and is configured to slow down the driving speed of the actuator in conjunction with the reduction operation of the relative spacing of each detection device, and the relative spacing (dead band width) of the pair of detection devices
By changing the , the optimum handling depth width can be obtained according to the shape of the tip of the culm, etc., and by adjusting the driving speed of the actuator in conjunction with the operation of increasing and reducing the relative interval of each of the detection devices, The object of the present invention is to provide an automatic length/short culm adjustment device for a combine that can prevent the hunting operation of a vertical conveyance device and can be safely handled with simple operation.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view of a combine harvester equipped with an automatic long and short culm adjustment device according to the present invention, and Fig. 2 is a plan view thereof. 1 is a machine base, 2 is a track frame equipped with a pair of running rollers 3, 3 on both sides, and 4 is a track frame that allows the machine base 1 to rotate in the vertical direction when the machine base 1 is turned, etc. 2 is a pivot shaft supported; 5 is a cylinder that lifts the front part of the machine 1 upwards using the pivot shaft 4 as a fulcrum; 6 is a threshing device mounted on the machine 1; The trunk T is mounted on an axis along the longitudinal direction of the machine base 1.

Reference numeral 8 denotes a reaping device for multi-row mowing, which is composed of a plurality of grass dividing boards 9 and a cutting blade 10.

Reference numeral 11 denotes a husk culm transfer device, which is composed of a feed chain 12 and a culm rod 13, and is installed along the handling opening (not shown) of the threshing device 6.

Further, 14 is a driver's seat, 15 is a driving operation section, 16 is a grain pedestal facing upward from a grain frying conveyor device 17 for taking out fine grains from the first mouth, and 18 is a rear part of the threshing device 6. 19 is a straw removal chain extending from the terminal end of the feed chain 12 to the upper part of the cutter of the straw removal cutting device 18; 20 is a cover for the chain 19;

Further, 21 is an engine mounted on the machine base 1, and 22 is a drive sprocket for the running roller 3, which is connected to a transmission (not shown) during running.

Further, 23 is a roller 3 running together with the sprocket 22.
A front idler 24 supports the end of the carrier roller 2 which is brought into sliding contact with the upper inner surface of the running roller 3.
5... are a plurality of track rollers brought into sliding contact with the lower inner surface of the running roller 3.

Furthermore, 26 is a suction/discharge seat device whose suction port is opened toward the sorting air path, 27 is an inlet supply plate provided at the lower part of the handling chamber of the threshing device 6, and 28 is a handling barrel pulley cover.

Next, to explain the shell culm conveying device, a raking drum 29 is installed above the cutting blade 10 in the reaping device 8.
The scraping drum 29 is equipped with a star wheel 30 for scraping the root side of the culm, which can be rotated freely.

Each of these star foils 30 is equipped in correspondence with the left and right shell culm lifting devices 3132, and a lower conveyor cheno 33 is installed coaxially with these star foils 30.
．． A sprocket (not shown) for driving the culm 33 is provided to constitute the left and right lower conveying devices, which are configured to clamp and convey the culm base of the shell culm.

Further, left and right upper conveying devices 34° 34 for pinching and conveying the tip side of the shell culm are extended above the left and right lower conveying devices, and the conveying tines 34a of these devices 34, 34 are connected to the shell culm conveying path. The upper conveyance devices 34, 34 are covered with an upper conveyance left cover 35 and an upper conveyance right cover 36, respectively, in a state where they are exposed in a protruding manner.

The starting end of a vertical conveying device 37 whose length can be adjusted is exposed behind the upper conveying device 34° 34, and its terminal end extends toward the starting end of the feed chain 12. ing.

Further, a detection device 3 is provided on the inner surface of the handling cylinder pulley cover 28.
8.39 are attached, and these devices 38 and 39 detect the handling depth of the culm inserted into the handling chamber and vary the inclination angle of the vertical conveyance device 37 via a hydraulic circuit.

The long and short culm automatic adjustment mechanism, which is the core of the present invention, will be explained in detail based on FIGS. 3 to 5.
．． 39 is a microswitch 40 having a normally open contact 40a
On the other hand, the vertical conveyance device 37 is equipped with a first connecting rod 42 connected to the intermediate pivot portion 37a, and a second connecting rod 42 connected to the lower end pivot portion 37b. A connecting rod 43 is provided in series, and the intermediate portion of this second connecting rod 43 is connected to a piston rod 45 of a hydraulic cylinder 44 which is an actuator.

Further, the vertical conveyance device 37 is equipped with a microswitch 46 for detecting the culm, and this microswitch 46 has a normally open contact 46a.

The chamber 44a on one side of the cylinder 44 across the piston is connected to a tank 48 via a hydraulic pump 47, and the chamber 44a on the other side is connected to a tank 48 via a hydraulic pump 47.
4b is directly connected to tank 48.

However, a 4-port electromagnetic switching valve 51 having solenoids 49 and 50 is provided between the hydraulic cylinder 44 and the tank 48.

Further, a relief valve 52 is provided on the discharge side of the hydraulic pump 47.
and a variable throttle valve 53 are connected to each other.

On the other hand, the electric circuits associated with this hydraulic circuit are connected as shown in FIG.

That is, a power switch 55 is connected to the battery 54, and a series circuit of the contacts 46a, 41b and the solenoid 49 and a series circuit of the contact 40a and the solenoid 50 are connected in parallel to the power switch 55.
Manual switches 56 and 57 are connected between the battery 54 and each solenoid 49 and 50, respectively.

Next, the variable dead zone width structure of the detection device for automatic adjustment of long and short culms will be explained with reference to FIG. , 59
A pair of detection devices 38, each having a second sensor arm 62, 63 made of a plate spring material and attached to one side with elongated holes 60 and screws 61 so as to be height adjustable in the vertical direction. 39 is rotatably attached to a pivot shaft 64, and the upper protrusions 38a, 3 of each of these detection devices 38, 39
9a has an arm 6 whose upper end is loosely fitted into the lifting pin 65.
6. Each lower end of 67 is a pivot.

Further, a threaded rod 68 for vertically moving the elevating pin 65 is provided.
is screwed onto the holding plate 69, and this threaded rod 68
When the sensor is moved up and down, the pair of detection devices 38 and 39 are pivoted along the pivot shaft 64 via the lifting pin 65 and each arm 66, 67, and the width of the dead zone is variable. It is.

Moreover, when the dead band width is widened by such an operation,
The hydraulic pressure flow rate is adjusted by the variable throttle valve 53 to increase the driving speed of the cylinder 44, and conversely, when the dead zone width is shortened, the driving speed of the cylinder 44 is slowed down.

Further, each of the detection devices 38 and 39 is connected to the handling drum pulley cover 2.
It is installed in 8.

Note that the pair of detection devices 38 and 39 are held by a unit member 70 as shown by imaginary lines in FIG.
Of course, it is also possible to axially move the main pivot shaft 71 along the main pivot shaft 71.

Further, 72 in FIG. 2 indicates the fourth gutter upper cover 73, which is an air cleaner.

The present invention is constructed as described above, and its operation will be explained below.

Now, after turning on the power switch 55 shown in FIG. 4, when the microswitch 46 detects the culm to be lifted and transported by the vertical transport device 37, its contact 46a is turned on and drives the solenoid 49. , the switching valve 51 is switched, hydraulic pressure from the hydraulic pump 47 is supplied to the chamber 44b on the other side of the cylinder 44, and the piston rod 45 connected to the second connecting rod 43 moves in the direction of arrow a in FIG. As a result, the vertical conveyance device 37 swings counterclockwise as shown by the imaginary line in the figure, and its inclination angle becomes steeper.

Next, the culm transported by the vertical transport device 37 is inserted into the handling chamber through the inlet supply plate 27 and the handling opening.
When this culm hits the sensor arm of each of the detection devices 38, 390), the contacts 40a and 41b of each microswitch 40 and 41 are actuated, and one solenoid 4
At the same time as the solenoid 9 is de-energized, the other solenoid 50 is energized.

Therefore, the electromagnetic switching valve 51 is switched and the hydraulic pump 4
Hydraulic oil from 7 is supplied to the chamber 44a on one side of the hydraulic cylinder 44 and pushes up the piston rod 45 connected to the second connecting rod 43 in the direction of the arrow in FIG. It swings clockwise as shown in , and the angle of inclination becomes gentle.

At this time, for example, if the shell culm is in contact with only one of the detection devices 39, both the contact 40a of the microswitch 40 and the contact 41b of the microswitch 41 are off, so the current supply to each solenoid 49, 50 is cut off. The vertical conveyance device 37 detects the tip of the culm with each detection device 38,
The swinging is stopped with the state maintained between the sensor arms at 39.

Next, if a relatively short culm is transported and its tip does not contact any of the sensor arms of each detection device 38, 39, the microswitch 41 in one of the detection devices 39 is Since the contact 41b becomes normally closed, the solenoid 49 is energized again, and in the same manner as described above, the vertical conveying device 37 is swung counterclockwise as shown by the imaginary line in FIG. 3 to deeply treat the culm. It is inserted into the side.

Hereinafter, by repeating such automatic control, the depth of handling of the culm is automatically controlled.

In addition, when adjusting the handling depth manually, by turning on and off the manual switches 55 and 56 as appropriate, the handling depth of the culm can be controlled in the same way as in the case of automatic adjustment. It is something.

Moreover, each detection device 38 can be rotated by rotating the threaded rod 68.
．． When the width of the dead zone 39 is expanded or contracted, the driving speed of the hydraulic cylinder 44 changes in conjunction with this.

That is, when the width of the dead zone is widened, the hydraulic flow rate to the cylinder 44 is increased by the variable throttle valve 53, the driving speed of the cylinder 44 is increased, and the swinging speed of the vertical conveyance device 37 is accordingly increased. conversely, when the dead band width is shortened, the hydraulic flow rate to the cylinder 44 is reduced by the variable throttle valve 53 and the cylinder 4
The driving speed of the cylinder 44 and the vertical transporting device 37 decreases, and accordingly, the swinging speed of the vertical conveying device 37 decreases, making it possible to always maintain the driving speed of the cylinder 44 and the vertical conveying device 37 at an optimal value depending on the width of the dead zone. It is possible.

As is clear from the above embodiments, the present invention includes a pair of detection devices 38 and 39 for detecting the tip of the culm, and the detection device 38 changes the inclination angle of the vertical conveyance device 37 via an actuator such as a hydraulic cylinder 44. In a combine harvester in which the devices 38 and 39 are installed in the culm conveying path from the reaping device 8 to the threshing device 6, each of the detection devices 38 and 39 is supported so that the relative interval (dead zone width) can be adjusted, and each The driving speed of the actuator 44 is increased in conjunction with the operation of increasing the relative distance between the detection devices 38 and 39, and the driving speed of the actuator 44 is decreased in conjunction with the operation of decreasing the relative distance between the detection devices 3a39. By changing the relative spacing (dead zone width) between the pair of detection devices 38 and 39, it is possible to obtain an optimal handling depth width depending on the shape of the tip of the culm, etc. 3939
By adjusting the drive speed of the actuator 44 in conjunction with the expansion/reduction operation of the relative interval between the
This device has remarkable effects such as being able to prevent the hunting operation of the device, being easy to operate and safely handling, and being extremely practical.

[Brief explanation of drawings]

FIG. 1 is a side view of the combine harvester according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a system diagram showing a long and short culm automatic adjustment mechanism.
Figure 4 is its electrical circuit diagram, Figure 5 is the detection device 38.39
FIG. 2 is an enlarged view of main parts showing a dead zone width variable mechanism in FIG. 37... Vertical conveyance device, 38, 39... Detection device, 4
4...Cylinder.

Claims (1)

[Scope of utility model registration request] A pair of detection devices 38 and 39 are provided for detecting the tips of the culms, and the detection devices 38 and 39 that vary the inclination angle of the vertical conveyance amount 37 via an actuator 44 are used to detect the tip of the husk from the reaping device 8 to the threshing device 6. In the combine harvester installed in the conveyance path, each of the detection devices 38 and 39 is supported so that the relative spacing thereof can be adjusted, and the actuator 44
The long and short culm automatic adjustment device for a combine is configured to increase the driving speed of the actuator 44 and to slow down the driving speed of the actuator 44 in conjunction with the reduction operation of the relative spacing between the detection devices 38 and 39.