JPH0151966B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic reel height adjustment device for a harvester, and more specifically, a drive device 55 is provided for vertically driving a reel 43 for raking grain culms, and the reel 43 is This reel 4
A detection device 53 is provided to detect the height of the tip of the grain culm immediately before it is raked by the reel, and upon receiving a detection signal from the detection device 53, the drive device 55 determines the appropriate raking height of the reel. The present invention relates to an automatic reel height adjustment device that maintains the height of the reel.

Generally, harvesting machines are known in which a reel for raking grain culms is configured so that the raking height can be adjusted according to the height of the grain culms.

Conventionally, the height position of this type of harvesting machine has been manually adjusted visually by an operator according to the height of the grain tip of the grain culm. However, since there are too many operations to be performed on other devices, considerable skill is required to adjust the appropriate height of the reel along with these operations.

The present invention was devised in view of the above-mentioned problems, and it is an object of the present invention to provide an automatic reel height adjustment device that can automatically adjust the appropriate height of the reel.

Hereinafter, a preferred embodiment of the present invention will be described in detail using the drawings.

In FIG. 1, reference numeral 1 denotes a harvesting machine such as a combine harvester equipped with a device according to the present invention. A reaping section 9 and a conveying section 11 are provided in front of the cutting section 7 .

The traveling device 3 is installed on both the left and right sides of the machine base 5, and is configured by suspending a crawler 21 between a driving wheel 15, a driven wheel 17, and an idler wheel 19, which are rotationally driven by a transmission device 13 such as a gear mechanism. ing.

The reaping section 9 includes a pair of left and right grass cutting bodies 23 provided on both sides of the front part of the machine body 7, and a grass cutting body 23 provided on both sides of the front part of the machine body 7.
3 and a cutting blade 25 that reciprocates in the transverse direction, the grain culm to be reaped is separated and the parted grain culm is harvested from the root part thereof.

The conveyance section 11 has a grain culm supply port 27 formed immediately after the cutting blade 25 and on the front surface of the machine body 7.
Two rotatable rolls 29, 3 are placed just before the
1 are provided in parallel, and these rolls 29, 31
It is constructed by suspending a conveyor belt 33 made of an endless belt, and conveys the grain culm cut by the cutting blade 25 rearward and upward.

A threshing section 35 is provided inside the machine body 7. This threshing section 35 is composed of a drum-shaped handling drum 39 in which a large number of handling teeth 37 are installed, and a concave 41 that bends around the outer periphery of the handling drum 39, and is transported rearward and upward by the transport section 11. The grain culm is received from the grain culm supply port 27 and threshed.

Further, in the rear lower part and rear of the threshing section 35 in the machine body 7, there is a sorting section (not shown) for sorting the threshed grains, and a foliage discharge section for discharging the foliage after threshing to the outside of the machine. (not shown) is provided.

Reference numeral 43 denotes a reel disposed above the weeding body 23, and the reel 43 is connected to a pair of left and right brackets 45 which are provided on the left and right weeding bodies 23 and are opposed to each other, and each of which is connected to a connecting device such as a pin. 4
A pair of left and right reel support arms 4 whose bases are pivoted by 7 and which extend forward and are freely rotatable in the vertical direction.
It is rotatably attached to the tip of the reel 9 via a reel shaft 51. This reel 43 is
The reel 43 is used to level and rake the grain culms that have been parted by 3, and the appropriate height of the reel 43 can be adjusted by an automatic reel height adjustment device according to the height of the tip of the grain culm to be reaped. It is composed of

As shown in detail in FIGS. 2 and 3, the automatic reel height adjustment device according to the present invention includes a detection device 53 for detecting the height of the tip of the grain culm, and a reel height adjustment device according to a command of the detection device 53. Therefore, the reel 43 is configured as follows by a driving device 55 that drives the reel 43 up and down.

Reference numeral 57 denotes a pair of left and right detection device mounting arms whose bases are rotatably attached to the left and right end portions of the reel shaft 51, and a detection device mounting shaft 59 is horizontally suspended at the tips thereof. The detection device mounting shaft 59 includes:
Two detection units 61 and 63 forming the detection device 53
is installed. The two detection units 61, 6
3 is arranged so that the detection of the height of the ear tip is different from each other at the left and right sides of the position where the tip of the grain culm immediately before being scraped by the reel 43 is detected. 61 is configured to detect a low position of the tip height, and the other detection section 63 is configured to detect a high position of the tip height. Therefore, the height of the tip can be detected reliably. Reference numeral 65 denotes the pair of left and right reel support arms 49.
Adjustment rods are arranged in parallel on one or both (one side in the drawing), and the tips thereof are rotatably pivoted to a support portion 67 that is integrally connected to the rear end of the detection device mounting arm 57. , the rear end is connected to the bracket 45
The support member 69 is rotatably connected to a support member 69 that is integrally connected to the support member 69 .

A drive device 55 that drives the reel 43 up and down.
is constructed as follows using a fluid pressure mechanism such as a hydraulic cylinder.

71 is a cylinder whose base is connected to the branching body 2
The piston rod 77 is rotatably pivoted to a bracket 73 fixed to the reel support arm 49 at a suitable position on the reel support arm 49 by means of a connector 75 such as a pin. The reel 43 is rotatably connected by a connector 81 and is provided between the grass divider 23 and the reel support arm 49, and the reel 43 is driven up and down via the reel support arm 49 by the expansion and contraction action of the piston rod 77. It is configured as follows.

83 is a pilot's seat provided above the front part of the aircraft body 7.

FIG. 4 shows a hydraulic circuit diagram of the drive device 55 which is driven by the command from the detection device 53, and is constructed as follows.

Reference numeral 85 denotes a solenoid valve that is operated in response to a command from the detection unit 61, and is switched between the A position and the B position by the operation of a solenoid 87. Reference numeral 89 denotes a solenoid valve that is operated in response to a command from the detection unit 63, and is switched between the C position and the D position by the operation of a solenoid 91. Further, reference numeral 93 designates a solenoid valve of a relief circuit that operates in conjunction with the solenoid valve 85, and is switched between the E position and the F position by the operation of the solenoid 95. 97,9
9 is a relief valve, 101 is an oil tank, 1
03 is a hydraulic pump.

In the above configuration, when the combine 1 moves forward by being driven by the traveling device 3, the weed cutting body 23 weeds the grain culm of the width to be reaped, and at the same time, the reel 43 rotates and the tip of the grain culm faces rearward. The grass is leveled and raked in this manner, and then the cutting blade 25 cuts the root portion of the grain culm, and the cut grain culm is sequentially sent rearward and upward by the conveyor belt 33. Then, the grain is fed into the threshing section 35 from the grain supply port 27. Threshing section 35
After threshing is completed, the stalks and leaves are discharged from the machine through a stalk and leaf discharge section (not shown), and the grains fall from the concape 41, are sorted by a sorting section (not shown), and are harvested.

In the reaping and harvesting work carried out in this way, when the reel 43 that scrapes the tip of the grain culm is at an appropriate height position, one of the detection parts 61 of the detection device 53 is in a position to detect the tip of the grain, and the "ON" state is detected. '', the solenoid valve 85 is in the B position due to the operation of the solenoid 87, and the other detection section 63 is in the OFF state in a position where it does not detect the tip.
The solenoid valve 89 is located at the C position, and the reel 43 is held at an appropriate height position with the drive device 55 in a stopped state. At this time, the solenoid valve 93 is located at the E position, and the pressure oil from the hydraulic pump 103 is returned to the oil tank 101 through the relief circuit.

Now, when the tip of the grain culm becomes high and the position of the reel 43 is located at a low position with respect to the tip of the grain culm,
The other detection section 63 of the detection device 53 also detects the tip and becomes "ON", and at the same time, the solenoid valve 89 is switched to the D position by the operation of the solenoid 91, and at the same time, the solenoid valve 93 is switched to the D position by the operation of the solenoid 95. F
Switch to position. Accordingly, drive device 55 is actuated to extend piston rod 77 and raise reel 43 via reel support arm 49. Then, when the reel 43 rises to the appropriate height position (the tip of the grain culm is between the detection unit 61 and the detection unit 63), the detection unit 63 enters the "OFF" state in which it does not detect the tip of the grain, At the same time as the solenoid valve 89 switches to the C position, the solenoid valve 93 switches to the E position to stop the operation of the drive device 55 and maintain the reel 43 at an appropriate height position.

Furthermore, when the tip of the grain culm becomes low and the reel 43 is located at a high position relative to the tip of the grain culm, one of the detection units 61 of the detection device 53 is in an "OFF" state in which it does not detect the tip. So, the solenoid valve 85
is switched to the A position, actuating the drive device 55, contracting the piston rod 77, and lowering the reel 43. When the reel 43 descends to the appropriate height position, the detection unit 61 detects the tip again and becomes "ON", and the solenoid valve 85 is switched to the B position by the operation of the solenoid 87, and the drive device 5
5 is stopped and the reel 43 is held at an appropriate height position. When the reel 43 is raised, the detection device mounting arm 57 is attached to the adjustment rod 6 at the support portion 67.
5 and rotates downward (counterclockwise rotation in Figure 2). When the reel 43 descends, the detection device mounting arm 57 rotates upward (clockwise rotation in FIG. 2). Therefore, the relative height H between the reel 43 and the detection device 53 is always kept constant. This eliminates the trouble of manually correcting the relative height between the reel 43 and the detection device 53 according to the vertical position of the reel 43.

FIG. 5 shows another embodiment of the present invention, in which the adjustment rod 65 in the above-mentioned embodiment is constructed by an adjustment wire 105, one end of which is provided near the cockpit 83. positioning guide 1
07, the other end is slidably inserted into the support member 69, and rotatably pivoted to the support member 67, and the adjustment lever 109 is operated. Accordingly, the adjustment member 65
The relative height H between the reel 43 and the detection device 53 is adjusted by changing the length of the reel 43 and the detection device 53. And once the height H
is always maintained constant by loosening the adjustment wire 105 when the reel 43 goes up and tightening the adjustment wire 105 when the reel 43 goes down.

As described above, the present invention provides a drive device for vertically driving a reel for raking the grain culm, and detects the height of the tip of the grain culm immediately before being raked by the reel on the front side of the reel. The reel height automatic adjustment device is characterized in that a detecting device is provided, and upon receiving a detection signal from the detecting device, the driving device maintains the appropriate raking height of the reel. Since the tip height is detected in a natural upright position before the reel rakes, the appropriate reel raking height is accurately set and automatically maintained, greatly simplifying operator operations. It is something that will be done.

Note that this invention is not limited to the above-mentioned embodiments, and the invention can be implemented in modes other than the above-mentioned embodiments.

Further, although reference numerals are written in the claims section for convenient comparison with the drawings, the reference numerals do not limit the technical scope of the present invention.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side explanatory view of a combine harvester equipped with a device according to the invention, and Figs. 2 and 3 are side and front views of main parts. , Figure 4 is an explanatory diagram of the hydraulic circuit, Figure 5
The figure is a side view showing another embodiment of the invention. Explanation of symbols representing main parts of the drawings, 43...
... Reel, 53... Detection device, 55... Drive device, H... Relative height between reel and detection device.

Claims (1)

[Scope of Claims] 1. A drive device 55 is provided to vertically drive a reel 43 for raking the grain culm, and the height of the tip of the grain culm immediately before being raked by the reel 43 is measured on the front side of the reel 43. An automatic reel height adjustment device characterized in that a detection device 53 is provided for detection, and upon receiving a detection signal from the detection device 53, the drive device 55 maintains the appropriate plowing height of the reel. 2. At least two detection devices 53 are provided to detect different ear tip heights, and the reel 43 is properly positioned so that the tip of the grain culm is located between the top and bottom of the two detection devices 53. 2. The reel height automatic adjustment device according to claim 1, wherein the reel height automatic adjustment device maintains the raking height. 3. The reel height automatic adjustment device according to claims 1 and 2, wherein the relative height H between the reel 43 and the detection device 53 is always constant.