JPS58141722A - Combine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a harvester equipped with a cutting height adjustment device and a handling depth adjustment device.

The cutting height adjustment device uses a hydraulic device to drive the height of the cutting section up and down, changing the height of the field surface and the cutting section to obtain the appropriate cutting height. The inclination angle of the conveyor chain is changed by a hydraulic device to obtain an appropriate pulling angle. Normally, straw cm pressure devices are driven by a single hydraulic power source, and both devices are connected in series to reduce the number of parts, so either device can be selectively driven. In this case, the device on the upstream side (closer to the hydraulic pressure source) is preferentially driven. Therefore, if it is necessary to adjust the cutting height and handling depth at the same time, only the cutting height will be adjusted.
1. There was a drawback that the handling depth could not be adjusted.

The present invention has been made to eliminate such drawbacks, and an object of the present invention is to provide a harvester that can simultaneously adjust cutting height and handling depth.

The present invention will be explained in detail below based on the drawings showing examples thereof. Figure 1 shows a harvesting machine according to the present invention (hereinafter referred to as the present invention machine)
Fig. 2 is a perspective view of the external appearance, and Fig. 2 is a hydraulic circuit diagram of the main parts thereof. In the figure, X indicates a reaping section, and the reaping section includes a divider 1,
It is composed of a culm pulling device 2, a cutting blade 3, etc., and the culm is divided by a divider 1, lifted up by the pulling device 2, and harvested by the cutting blade 3. The cut culm is shown in the figure. The grains are fed to the threshing section through the upper and lower conveying devices, which do not have the same structure, and then through the vertical conveying chain.

Reference numeral 8 denotes a sensor for automatically adjusting the cutting height relative to the grain culm by detecting the ground height of the cutting section within a certain range. The sensor arm 8a is movably supported at the same time, and its tip is slidably in contact with the ground surface by itself or using an appropriate biasing means, and the sensor arm 8a is moved in accordance with the vertical distance between the ground surface and the sensor box 8b. The rotation angle of is changed, and two photoelectric switches su and sa (see FIG. 3) in the sensor box 8b are selectively operated according to the rotation angle of and.

Detection switches M and H that open and close by detecting the long and short dimensions of the L-hull culm are installed near the entrance of the slag threshing section in the order of M and H starting from the vertical conveyance chain 4. If the culm is long enough to be reached by the detection switch Hvc located on the far side (on the right side of the machine body) from the vertical conveyance chain 4 or feed chain 5, the vertical conveyance chain 4 is detected by the machine body. If the culm is so short that the tip does not reach the detection switch H9M, the vertical conveyance chain 4 is raised to the inside of the body, so that the tip reaches the detection switch H9M. The configuration is such that the posture of the vertical conveyance chain number is rotationally adjusted to a state where it is located between the two, and the feed chain 5 takes over in that state. Furthermore, a detection switch L consisting of a limit switch, etc. is provided at a position quite far away from the vertical conveyance chain 4 from the detection switch M, and detects when the vertical conveyance chain 4 is blocked by the culm and the feed chain. It is designed to detect that the paper is being conveyed toward No. 5. Note that the positions of the culm detection switches L, M, and H are not limited to nKVI &; for example, the detection switches L, M, and H may be located above the vertical conveyance chain 4.

Fig. 2 shows the hydraulic circuit diagram of the machine of the present invention together with a schematic diagram of the driven system controlled thereby. The cutting height adjusting device is configured to control the hydraulic cylinder 'Is C2 of each height adjusting device, and in the machine of the present invention, the cutting height adjusting device is located on the upstream side. That is, the pressure oil from the hydraulic pump P flows through the solenoid valve v.
1 is connected to the hydraulic cylinder C for raising and lowering the reaping part of the cutting height adjustment device through the ``1'' solenoid valve v1?Flow rate WJ4 regulating valve vl.
It is supplied to the gamma heavy pressure cylinder C2 for controlling the vertical conveyance chain 4 of the handling depth adjustment device via the solenoid valve V.

The cutting height adjusting device and the cutting section K are vertically supported on the rear axle with respect to the main frame of the machine (track 7 frame) through its support frame, and are integrated with the support frame. Due to the movement of the piston rod of the hydraulic cylinder C1 interposed in between, only the reaping section or the driver's seat U
It is designed to move up and down along with the others.

The handling depth adjustment device tilts or stands up the vertical conveyance chain 4 by moving the piston rod of the hydraulic cylinder C2 back and forth, and adjusts it to the side for cross-cutting or deep handling.

' Solenoid valve v, /d is a 4-point, 3-position switching type directional control valve, and when the solenoid 8u is energized and energized, pressure oil is supplied to the hydraulic cylinder C1, and the n1 piston rod advances. When the reaping section X, etc. rises, and conversely, the solenoid Sd is energized and energized, the oil pressure in the hydraulic cylinder C3 decreases, and the reaping section X descends due to its own weight. If both solenoids 8u and 8d are not energized and demagnetized, the solenoid valve V is in the neutral position, and the height of the reaping part is maintained at the position at the time of switching to the neutral position. 1 Pressure oil from the hydraulic pump P is supplied from the flow rate p4!1 valve v3 to the solenoid valve v2. flow rate adjustment valve v
3 is equipped with a relief valve to prevent overload, and the flow rate of pressure oil to the flow rate regulating valve V3 is large. j −7
The valve is opened to allow pressure oil to flow back into the tank.

Solenoid valve V, ii is a four-boat three-position switching type directional control valve, and when both solenoids Su and 8d of solenoid valve v1 are demagnetized and solenoid valve V is in the neutral position, one solenoid valve V.

When the solenoid Sm is energized and excited, the solenoid valve V
, the pressure oil from the hydraulic cylinder C2 passes through the flow rate adjustment valve v8.
The piston rod is supplied to the oil chamber on the rod advancement side, and the piston rod advances as shown by the arrow, tilting the vertical conveyance chain 4 and adjusting it to the planing side. Conversely, when the solenoid 8hK is energized and energized, the piston rod is retracted and the vertical conveyance chain 4t is erected and adjusted to the deep handling side. Further, when both of the renoids 8m and ShK are not energized and demagnetized, the solenoid valve V is in the middle position, and the vertical conveyance chain 4 is held at the neutral position e (the position at the time of switching).

FIG. 3 shows a 61ij battery in FIG. 0, which is an electric circuit diagram of the supporting parts of the machine of the present invention, and the positive electrode line of this battery 61 is connected from the key switch 62 to the solenoid Su of the solenoid valve V for adjusting the cutting height. Sd, solenoid valve V for adjusting the urine handling level, and solenoids Sh and SmV are connected in a large series.

The key switch 62 is used to set the threshing clutch to the engaged state during threshing work.The threshing switch 63 is turned on when the threshing lever is operated, and the key switch 63 is turned on when the reaping lever is operated to put the reaping latch into the engaged state during the reaping work. Reaping switch 6
4, and the normally open contact La of the grain/detection switch L mentioned above.
It is connected to the pulse oscillation circuit 65 through a series circuit of
When the pulse oscillation circuit 65 is energized, the duty ratio is V2.
emits a pulse signal. The pulse oscillation circuit 65 is connected to one input terminal of the OR gate 66.

Normally closed contacts r and b of the grain culm detection switch L connected to the key switch 62 are connected to the other input terminal of the OR gate 66. Output of OR gate 66; ND gate 91.
Each of 92 becomes human power, and each of 93.94 (AND game) becomes human power via inverter 95.

A manual switch 81 for lowering the cutting command and a light 1 switch 8u for raising the cutting height sensor 8 are connected to the other input terminal of the AND gate 91. Vc is a manual switch 82 for lowering the cutting command and a photoelectric switch 8 for lowering the cutting height sensor 8 command.
d are connected together, and photoelectric switches 8u and 8d
The automatic cutting height switch 67 is connected to both manual switches 81 and 82 and the key switch 62. When the height of the cutting section above the ground exceeds (or falls below) a predetermined value, the cutting height changes. When the sensor arm 8a of the sensor 8 rotates downward (or upward), the photoelectric switch 8 (1 (or 8u) is turned on, and the manual switch 81 or 82 is operated, the I
Priority is given to the ri power source, switches 8u and 8cl.

AND game) 91,92 switch circuit 9 for each output
Solenoid Su, 5dVC provided through f3.97 c
r.

A limit switch 73 is connected to the side input terminal of the A N D cable 95. The limit switch 73 has a manual switch 71 for the sand handling command A and an automatic handling depth switch 6B.
, a normally open contact Ma of the detection switch M and a parallel circuit with the series circuit of the normally open contact 1 (a) of the detection switch H are connected, and the parallel circuit is connected to the key switch P2.

Switch 74 to the other input end of AND gate 94
The limit switch 74 is connected to a normally closed contact Mb of a manual switch 72 for deep handling command connected to the key switch 62 and a detection switch M connected to the automatic depth handling switch 68.

Limit Sweets, Chig 3. Ma4 is i11 transport chain 4
When the tilting limit and the standing limit are reached, the circuit is opened at m and n, respectively, and when the tilting limit, that is, the cross plate limit is reached, the limit switch 73 is operated and the circuit is closed, and the rising limit, that is, the limit switch 73 is operated. When the deep extension limit is reached, the limit switch 4 is opened.

Each output of the AND gates 93 and 94 is connected to a switch circuit 9, respectively.
8.99'i to solenoids 8m, 8h.

A detailed description of the present invention constructed as a riveting device will now be given. When starting work by turning on the key switch 62 and also turning on the threshing switch 63 and the reaping switch 64, the culm detection switch L remains off because the culm has not yet reached the vertical conveyance chain 4. A high level signal is continuously input to the OR gate 66 via the normally closed contact Lb, and the OR gate 66 continuously inputs a high level signal to A.
0 is output to the single power end of the ND gates 91 and 92. If the switch 8u for raising the cutting height sensor 8 (or the switch 9 Sa for lowering the command) is turned on in such a state, or the manual switch 81 (or 82) is turned on, both inputs of the AND gate 91 (or Ifi 92) become high level, and the AND gate 91 (or 92) continuously sends a high level signal to the switch circuit 96 (or 97). This output continuously excites the solenoid Su (or Sa) and quickly raises (or lowers) the reaping part K.
When starting the reaping work, the reaping section is not in the reaping position (usually in the upper retracted position), so the reaping section should be brought to the proper reaping position as soon as possible, and when the reaping is finished, etc. The purpose is to quickly raise part X to avoid danger.

Now, when reaping starts and the reaped culm is conveyed to the vertical conveyance chain number, the detection switch L is turned on and its normally open contact L is turned on.
a is closed, normally closed contact Lb is opened, and pulse oscillation circuit 65
outputs a pulse signal with a predetermined duty ratio. As a result, a pulse signal is output in synchronization with the pulse signal generated by the OR gate 66Fi pulse oscillation circuit 65. OR gate 6
The pulse signal generated by 6 is supplied to the ND gates 91 and 92, and is inverted by the inverter 95 and then ANDed.
Gates 93 and 94 are the sole strength.

When adjusting cutting height and handling depth under such conditions,
Automatic adjustment and manual adjustment are possible, and the cutting height is adjusted by turning on the photoelectric switch 8U (also d8a) when the height of the cutting section , or when the manual switch 81 (or 82) is turned on, the other input of AND gate 91 (or 92) becomes high level. In order to output a pulse signal in synchronization with the pulse signal generated by the solenoid 8u (see Fig. 4 (a)), the switch circuit 96 (or 9)) is intermittently turned on to intermittently excite the solenoid 8u (or Sa). Under these conditions, the culm detection switch of the handling depth adjustment device detects that the culm is long (or short), and both detection switches M and H are turned on (or off). The normally open contacts Ma and Ha are closed (or open), and the normally closed contact M
) is open (or closed), or manual switch 1 (
0AHD gate 93 (or 72) is turned on, the other input of the AND gate 93 (or 94) becomes high level.
The pulse signal generated by the gate 66 is inverted and inputted to the inverter 95, and the AND gate 93 (also the gate 94)
) I-1, when the pulse signal generated by the OR gate 66 is low level, the switch circuit 98 (
Also, it outputs an output to ij99) (Fig. 4←) and turns on n, and intermittently excites the solenoid am (or sh).

Therefore, while the cutting height adjustment solenoid 8u (or Sa) is energized, the cutting depth adjustment solenoid am (
or sh) is not excited, and the pressure oil from the hydraulic pump P is sent from the solenoid valve vI to the hydraulic cylinder C4 (or tank) (
(or reflux) and then raise (or lower) the reaping section K. On the other hand, while the cutting height adjustment solenoid 8u (also Fisa) is demagnetized, the cutting depth adjustment solenoid B! Il(
or sh) is excited, and despite the priority order on the hydraulic circuit, the pressure oil from the hydraulic pump P is sent to the solenoid valve V via the solenoid valve V and the flow rate adjustment valve v3. is fed to the hydraulic cylinder C7 and the vertical conveyance chain number is set to 1.
(or tilt to the deep handling side) (or stand up). Even in cases where cutting height adjustment and handling depth adjustment are required at the same time, the solenoid valve v19 v2 Recommendation
Since the cutting height and handling depth can be adjusted at the same time without scattering the timing, it is possible to avoid the situation where the handling depth cannot be adjusted because the cutting height is being adjusted. In the present invention, although the hydraulic cylinder C8 on the upstream side of the hydraulic circuit is driven preferentially, the hydraulic cylinder C2 for adjusting the cutting depth on the downstream side and the hydraulic cylinder C2 on the downstream side are driven in the electric circuit. It becomes possible to simultaneously drive the hydraulic cylinder C1 for adjusting the cutting height on the upstream side.0 Also, during normal reaping work (when the culm detection switch L is on), the cutting height, Manual adjustment of cutting depth Only fine adjustments are made, but this adjustment is done in pulses, so even operators who are not accustomed to manual adjustment can easily adjust the cutting height and cutting depth. As described in detail above, the present invention provides a cutting height adjusting device and a cutting depth adjusting device that are driven by a single hydraulic power source and selectively braked by respective electromagnetic valves. In this harvester, the solenoids of both solenoid valves are intermittently excited, and the timing of excitation of the solenoid of each solenoid valve is different, so the harvester has excellent workability and operability. becomes possible.

In the above embodiment, the configuration is such that the pulse signal with the duty ratio V2 is inverted in order to make the excitation timing different, but the configuration is not limited to this, and the configuration may be such that the duty ratio of the inverted pulse signal is changed. .

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; Figure 1 is an external view of the machine of the present invention, Figure 2 is its hydraulic circuit diagram, Figure 3 is its main electrical circuit diagram, and Figure 1 (I ) and (b) are time charts for detailed explanation of the present invention. 1... Divider 4... Vertical conveyance chain 8...
Mowing height sensor 8u, 8d--Photoelectric switch 65-
...Pulse oscillation circuit F1. 〒2...Manual handling depth adjustment switch Sochi 81.82-...Manual cutting height adjustment switch 95...Inverter X...Reaping section vt9 v
t...Solenoid valve 8u.

Claims (1)

[Claims] 1. In a harvester equipped with a cutting height adjustment device and a handling depth adjustment device, each of which is driven by a single hydraulic power source and whose selective operation is controlled by each of the n1 solenoid valves, the solenoids of both of the solenoid valves are turned on and off. A harvester 0 characterized in that the timing of excitation of the solenoid of each solenoid valve is made to be excited at different times.