JPS5932256Y2 - Combine automatic lifting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic lifting device for a combine harvester that automatically raises and raises a reaping section at the end of a culm reaping operation.

Conventionally, a hydraulic cylinder for raising and lowering a reaping section and a switch for controlling this drive are provided, a sensor arm for operating the switch is provided on a reaping frame in front of the reaping blade, and the sensor arm is attached to the uncut culm to be incorporated into the reaping frame. There was a technique to bring them into contact.

However, since the uncut and husk culms whose bases are cut by the cutting blade are set up in a row, the traveling path of the combine may change to the left or right, or the row of uncut culms may If the sensor arm is bent left or right in the middle, if the sensor arm is short, the uncut culm will be cut by the cutting blade without contacting the arm, and the switch operation by the sensor arm will malfunction. In order to prevent this problem, if the sensor arm is formed to be long in accordance with the interval between the left and right reaping frames, the tip of the sensor arm that retreats due to the uncut culm will move to a position where it intersects the cutting blade, or the installation of the sensor arm will be difficult. The sensor arm is located at the front end of the cutting frame away from the cutting blade, which has the drawback of widening the movement range of the sensor arm and making the detection of uncut culms by the arm unstable.

The present invention solves the above-mentioned conventional drawbacks, and includes a hydraulic cylinder for raising and lowering the reaping section, a culm detection switch for detecting reaping work, a reaping end detection switch for detecting interruption of reaping work, and each of the above-mentioned switches. The sensor arm and each switch are provided on one of the left and right reaping frames in front of the cutting blade, and the length is such that it intersects with the culm guide provided on the other side of the left and right reaping frame. The tip of the sensor arm is extended to the end of the sensor arm, and by changing the left and right width of the culm guide according to the distance between the left and right reaping frames that support the cutting blade, it can be adjusted to the appropriate length determined by the support position in front of the cutting blade, etc. The sensor arm can be formed, the sensor arm can be easily supported at a desired position on the reaping frame, the detection switches can be easily mounted close to the sensor arm, and the sensor arm can be formed by uncut culm. The movement range of the sensor arm can be set to any width, and even when the row of uncut culms and the path of the machine do not match, the uncut culms to be taken into the reaping frame can be brought into contact with the sensor arm without fail. It is an object of the present invention to provide an automatic lifting device for a combine harvester, which stabilizes the detection operation and allows the detection switch to be operated reliably.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Fig. 1 is a schematic side view of a high-grade combine harvester, and Fig. 2 is a plan view thereof. In the figure, 1 is a machine base, 2 is a pair of running rollers 3,
3 is equipped on both left and right sides, and between this truck frame 2 and the platform 1 there are support structures 4, 4.
has been established.

Reference numeral 5 denotes a threshing machine mounted on the machine base 1, and inside thereof, a high-grade handling barrel 6 of a perpendicular type to the axis is mounted on a shaft along the longitudinal direction of the machine base 1.

Reference numeral 7 designates a reaping device for two-row mowing, which includes a plurality of grass dividing boards 8 and cutting blades 9, and each of these elements 8 and 9 is connected to a reaping frame 1.
0, and a rotating fulcrum pipe 13 for raising and lowering the reaping section is connected to the rear end of the frame 10 via a lifting drive bevel case 11 and a reaping drive connecting pipe 12, and a bracket 14 is connected to the connecting pipe 12. At the same time, a hydraulic cylinder 15 for raising and lowering is provided between the bracket 14 and the truck frame 2, so that the reaping part C can be raised and lowered as appropriate.

Reference numeral 16 denotes a culm pinching transfer device, which is composed of a feed chain 1T and a pinching rod 18 installed along the upper part of the chain 17, and extends along the handling opening of the thresher 5. It was established.

Further, 19 is a step, and a driver's seat 21 is provided on this step 19 via a seat pipe 20.
An operating column 23 is installed upright on the step 19 at the front, and a threshing clutch lever 24, left and right side clutch levers 25, 26, and a traveling main clutch lever 27 are installed on the operating panel surface 23a from within the operating column 23. A reaping latch lever 28 and a reaping latch lever 28 are respectively provided upright to form a driving operation section 22.

Furthermore, 29 is a paddy receiving stand, and above it 0 is facing a grain frying conveyor device 30 for taking out fine grains from the first mouth.

Reference numeral 31 indicates a second thrower tube for transferring the second reduction product from the second port at the bottom of the treatment chamber, 32 indicates a straw chain connected to the terminal end of the foot chain 17, and 33 indicates the chain 32.
It is the cover of

Further, 34 is a water-cooled 4-cycle condenser diesel engine mounted on the machine base 1, and 35 is a driving sprocket for the running roller 3, which is connected to the running transmission 36.

31 is an idle roller that supports the end of the roller 3 that runs together with the sprocket 35; 36... is a plurality of track rollers that slide into contact with the lower inner surface of the running roller 3; and 39, the suction port of which is connected to a sorting air path. 40 is an inlet supply plate provided above the front part of the threshing machine 5.

Next, a scraping wheel 41 and a scraping belt 42 are rotatably installed above the cutting blade 9 to scrape the root side of the culm.

In addition, each bevel case 11.43 has a connecting pipe 44.
．． 45, right and left shell culm pulling devices 46°4T are installed to cause the piloerection and lodging of the shell culm.

Furthermore, a sprocket (not shown) for driving a lower pre-conveyance chain 48 is provided coaxially with the scraping wheel 41 to constitute a lower pre-conveyance device, which is configured to clamp and convey the culm base of the culm. ing.

A starting end of a lower post-transporting chain 49 faces behind the pre-transporting chain 48, and a terminal end of the chain 49 extends toward the starting end of the feed chain 17.

On the other hand, an upper conveying device 50 for pinching and conveying the tip side of the culm is extended above the 0T section conveying chain 48, 49, and the conveying tines 50a of this device 50 are made to protrude toward the culm conveying path. In this state, the conveyance device 50 is covered with an upper conveyance cover 51.

The rotating force is transmitted from the bevel case 43 to the upper conveyance device 50 via the upper conveyance drive case 52.

By the way, there is a hydraulic device 5 at the bottom of the driver's seat 21 mentioned above.
3 and a hydraulic control lever 54 for automatic elevation, and by operating the lever 54, hydraulic oil is appropriately supplied to the cylinder 15 via a hydraulic circuit and an electric circuit, which will be described later. The mowing height of the culm can be adjusted by raising and lowering C.

Further, the long and short culm adjustment guide plate 55 includes a long and short culm adjustment lever 5.
6, the lower end of the lever 56 is connected to the lower pre-conveyance device constituting the lower pre-conveyance chain 48, and by manually operating the adjustment lever 56 as appropriate, the support shaft 51 can be used as a rotation fulcrum. The inclination angle of the lower pre-conveyance chain 48 is varied, and the transfer interval of each of the lower conveyance chains 48, 49 is adjusted to appropriately adjust the handling depth of the culm.

Furthermore, a traveling speed change lever 58 is provided upright on the traveling transmission 36, and the traveling speed of the aircraft is appropriately varied by operating the lever 58 via a speed change gear in the mission case.

Furthermore, 59 is an upper conveyance chain case, and a lower conveyance guide rod 60 is attached to this case 59, and
A feed chain guide rod 62 is attached to the rod 60 via a support fitting 61.

By the way, the above-mentioned reaping frame 10 is equipped with a sensor arm 63 for detecting the insertion of the culm, as shown in FIG. As shown, it moves rearward against the spring force of a spring 64, and is pivoted to the reaping frame 10 via a support shaft 65.

The reaping frame 10 also includes a culm detection switch 66 that is turned on when the sensor arm 63 is located at the culm insertion detection position (see the imaginary line in the figure);
A reaping end detection switch 61 that is turned on when the reaping end detection switch 61 is located at the reaping end detection position (see the solid line in the same figure) is attached to each of the left and right reaping frames 10 in front of the cutting blade 9.
The sensor arm 63 and each switch 66 on one side of 10
67, and the tip of the sensor arm 63 is extended to such a length that it intersects the culm guide 81 provided on the other side of the left and right reaping frames 10.10.

Next, as shown in FIG. 4, a sensor bypass type 3-position 3-port directional control valve, a so-called electromagnetic switching valve γ, has a solenoid 69, 70 on the discharge side of the constant displacement hydraulic pump 68.
1 to connect the lifting cylinder 15, and connect the IJ between the discharge side of the hydraulic pump 68 and the tank 72.
IJ-F valve 73 is connected.

Here, as is clear from the figure, one solenoid 69 is for ascending, and the other solenoid γ0 is for descending.

Further, a switching piece T4 is provided on the piston rod 15a of the cylinder 15, and the reset switch 75 is turned off when the rod 15a is in the raised position.

Next, as shown in FIG.
At the same time, a series circuit of a relay contact 77no, a reaping end detection switch 67 and a delay timer 18 is connected between the battery 76 and the earth, and a rise switch 19 and a rise solenoid 69 which are turned on by operating the control lever 54 are connected. The series circuit and the series circuit of the lowering switch 80 and the lowering solenoid 70 which are turned on by operating the lever 54 are connected in parallel, respectively, and the self-holding contacts 77a of the relay 77 are connected to both ends of the rough culm detection switch 66. , and time contacts 78a of a delay timer T8 are connected to both ends of the rise switch 19, respectively.

Here, the delay time by the delay timer 18 is set in advance to be equal to the time it takes for the final cut culm to be transferred from the lower pre-conveyance chain 48 to the lower post-conveyance chain 49 to the feed chain 11. It is.

The present invention is constructed as described above, and when the lift switch 19 is turned on via the operating lever 54, one solenoid 69 is energized, and at the same time, the electromagnetic switching valve 71 is switched, and the hydraulic pump 68 is turned on. Hydraulic oil is supplied to the hydraulic cylinder 15 through the pump port 1-P and actuator port A of the valve 71, and the piston rod 15a
The extension of the reaping device 7 raises the reaping device 7 in the high reaping direction.

Conversely, when the lowering switch 80 is turned on via the operating lever 54, the other solenoid 70 is energized, and at the same time, the electromagnetic switching valve 71 is switched in the opposite direction to that described above.
The hydraulic oil in the hydraulic cylinder 15 is returned to the tank 72 through the actuator port A and the tank port T of the valve 71 due to the weight of the reaping section C, and the reaping device 1 is lowered in the lower cutting direction.

Next, during the reaping operation, the insertion of the culm causes the sensor arm 63 to be located at the culm insertion detection position shown by the imaginary line in FIG.
7 and its contact 71a.

77no are all in the ON operating state.

Note that the relay 77 is self-held by its self-holding contact γ7a.

Next, at the end of the reaping process, the culm is no longer inserted;
When the sensor arm 63 returns to the reaping end detection position shown by the solid line in FIG. .

When a preset delay time elapses from the start of energization to the delay timer 78, that is, the time until the culm is transferred to the feed chain 17, the timer contact 78a is turned on due to the time-up of the timer 78. Power is applied to the lifting solenoid 69, and by energizing the solenoid 69, hydraulic oil from the hydraulic pump 68 is supplied to the hydraulic cylinder 15, and the reaping device 7 is automatically raised.

Here, the piston rod 15a of the hydraulic cylinder 15
When the is raised to the set position, the reset switch 75 is turned off by the switching piece 74 provided on the rod 15a, cutting off the power to the relay 77 and timer 78, and returning the time contact 78a to the normally open position to raise it. This is to cut off the power supply to the solenoid 69.

After turning the combine harvester, when the reaping device 7 is lowered again to restart the reaping operation, it is preferable to turn on the lowering switch 80 via the operating lever 54.

As is clear from the above embodiments, the present invention comprises: a hydraulic cylinder 15 for raising and lowering the reaping section C; a culm detection switch 66 for detecting reaping work; a reaping end detection switch 67 for detecting interruption of the reaping work; Each switch 66.67
In this structure, the sensor arm 63 and each switch 66.67 are provided on one of the left and right reaping frames 10.10 in front of the cutting blade 9, and the sensor arm 63 and each switch 66.67 are provided on one of the left and right reaping frames 10.10 in front of the cutting blade 9, and the The tip of the sensor arm 63 is extended to such a length that it intersects the culm guide 81 provided on one side, and the culm guide 81
By changing the left and right width of the sensor arm 63, the sensor arm 63 can be adjusted to an appropriate length determined by the support position in front of the cutting blade 9, etc.
The sensor arm 63 can be easily supported at a desired position on the reaping frame 10, the detection switches 66 and 67 can be easily installed in close proximity to the sensor arm 63, and The movement range of the sensor arm 63 can be set to any width, and even when the row of uncut culms and the path of the machine do not match, the uncut culms to be taken into the reaping frame 10 can be brought into contact with the sensor arm 63 without fail. This provides remarkable effects such as stabilizing the detection operation of the sensor arm 63, allowing reliable operation of the detection switches 66 and 67, and preventing malfunctions due to control of the sensor arm 63, allowing safe handling.

[Brief explanation of drawings]

FIG. 1 is a side view of a combine harvester showing an embodiment of the present invention;
FIG. 2 is a plan view thereof, FIG. 3 is a partial plan view showing the mounting structure of the sensor arm 63, FIG. 4 is a hydraulic circuit diagram for raising and lowering the harvest, and FIG. 5 is an electric circuit diagram for automatic raising. C... Reaping part, 9... Cutting blade, 10...
... Reaping frame, 15 ... Hydraulic cylinder, 63 ... Sensor arm, 66 ... Culm detection switch, 67 ... Reaping end detection switch, 81...Culm guide.

Claims (1)

[Scope of utility model registration request] A hydraulic cylinder 15 that raises and lowers the reaping section C, a culm detection switch 66 that detects reaping work, a reaping end detection switch 67 that detects interruption of reaping work, and a sensor arm 63 that turns on and off each of the switches 66 and 67. The start of the reaping work is detected through the culm detection switch 66 and the end of the reaping work is detected through the reaping end detection switch 67, and the reaping section C is raised by controlling the drive of the indicating cylinder 15. In the combine harvester,
The sensor arm 63 and each switch 66, 67 are provided on one side of the left and right reaping frames 10.10 (71) in front of the cutting blade 9, and the left and right reaping frames 10. An automatic lifting device for a combine harvester, characterized in that the tip of the sensor arm 63 is configured to extend along the length.