JPH0533004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a pre-processing attaching/detaching device for a combine harvester, which attaches/detaches a pre-processing device to/from a machine body.

(B) Prior Art Conventionally, in a combine harvester, a pretreatment device consisting of a reaping device and a handling depth adjustment device is rotatably and removably attached to a support member erected on the machine stand.
A means for operating the handling depth adjusting device to adjust the handling depth, such as a screw rod driven by a hydraulic cylinder or an electric motor, is interposed between the pretreatment frame and the handling depth adjusting device.

Japanese Patent Application Laid-Open No. 171615/1983 has already proposed a pretreatment device for a combine harvester as described above, which can be attached and detached using a hydraulic cylinder for raising and lowering the combine harvester.

(c) Problems to be Solved by the Invention The handling depth adjustment device in the known combine harvester has a narrow space between the pretreatment frame and the handling depth adjustment device, so it is difficult to install a lifting device, and the handling depth adjustment device is difficult to install. There were restrictions on the adjustment range.

In order to solve this problem, a locking member was provided protruding from the rear of the handling depth adjustment device, and this locking member was connected to a lifting drive device provided on the machine base. When applied to an attachment/detachment device for a pretreatment device, a new problem arises in that it is necessary to engage and detach the handling depth adjustment device and the lifting drive device.

(d) Means for solving the problems The present invention includes a handling depth adjusting device consisting of a reaping device and a grain culm carrier that swings up and down around the rear part, on a support member on a machine platform on which a threshing device is mounted. In a combine harvester in which a pre-processing device configured as above is attached to a support member in a removable and vertically tiltable manner, a locking member protruding rearward from its swing fulcrum is provided at the rear of the handling depth adjustment device, and the support The pretreatment device can be attached to and detached from the machine by connecting the upper part of the lifting drive device provided at the rear of the member to the locking member so that it can be engaged and detached by vertically swinging the handling depth adjustment device. When the handling depth adjustment device is tilted up and down slightly, the connection between the handling depth adjustment device and the lifting drive device provided at the rear of its swinging fulcrum can be easily disconnected and disconnected, thereby solving the above-mentioned problem. Resolved the point.

(E) Operation Grain culms harvested by the reaping device of the pre-processing device are supplied to the threshing device and threshed while the handling depth is adjusted by the handling depth adjusting device.

When removing the preprocessing device from the aircraft in order to maintain the preprocessing device or its transmission device, etc.,
When the handling depth adjustment device is pushed up by hand, the locking member at the rear thereof and the upper part of the lifting drive device are easily separated. In this state, the pretreatment device is removed from the aircraft and various maintenance work is performed.

Once the maintenance work is completed, the pretreatment device is installed on the aircraft, and then the handling depth adjustment device is pushed up and engaged with the upper part of the lifting drive.

(F) Example An example of the present invention will be explained with reference to the drawings.
1 is a threshing device mounted on one side of a machine base 3 having a traveling device 2, and on the other side, in order from the front, there is an operation panel 4, a driver's seat 5, an engine below it,
A grain hopper 6 etc. is provided, and a pre-processing device 7
are the cutting body 8..., the grain culm triggering body 9..., the raking wheel 1
A cutting device consisting of a stock cutting chain 11, a stem cutting belt 12, etc., a stock cutting conveyor belt 13 with a clamping rail, and a panicle side conveying belt 14 with a guide rod. The preprocessing frame 15 has a horizontal axis holding cylinder 1 at the upper end.
6 is fixed thereto, a shaft holding cylinder 18 has a transverse transmission case 17 fixed to its lower end, and a reaping frame 19 is fixed to the transmission case 17. 1
9a is a lower support arm of the grain culm triggering body 9.

Support members 2 erected on both sides of the front part of the machine stand 3
0, 20 have upper parts connected by a horizontal frame 21, stays 22, 22 protruding from the rear surface connected to the front wall of the threshing device 1, and supports 23, 23 fixed to the upper ends of the supporting members 20, 20. has openings 24, 24 facing diagonally forward and upward, and these openings 24, 2
4 with the horizontal shaft holding cylinder 16, and the opening 24,
Rotate the locking levers 25, 25 pivoted on the lower side of 24 to the rear, and tighten the hole in the middle of them with the fixing bolt 2.
6 and 26, and is held rotatably by tightening with nuts 27 and 27.

In a recessed portion 30 at the rear end of the brackets 28, 28, which serve as a pair of receiving members welded to the rear surface of the shaft holding cylinder 18, a support pin 31 whose base is attached to the machine base 3 is provided.
A connecting pin 3 inserted through the front end of a piston of a single-acting hydraulic cylinder 32 supported so as to be movable up and down.
3 are fitted together via pipes 39, 39 which will be described later.

Further, the rotation restrictor 35 has a mounting metal 36 at the top, a turnbuckle 37 or a suitable expansion/contraction adjustment part is interposed in the middle, and a downward U-shaped metal 38 is fixed to the lower end. , U-shaped gold 38
The lower pipes 39, 39 are connected by fitting into the connecting pin 33, and a fixing member 40 (hole 41) protruding from the inner surface of the supporting member 20 and having an L-shape in plan view is connected to the lower part of the supporting member 20. When the processing device 7 is lowered to the same level as the traveling device 2 as shown in FIG. A hole 41 drilled in the shaft holding cylinder 18 and a hole 43 bored in the lever fixing member 42 protruding from the upper rear surface of the shaft holding cylinder 18 are provided in an arc shape centered on the connecting pin 33, and the upper mounting bracket 36 is The upper connecting pin 4 is attached to the fixing member 40 or 42.
Connect by 4.

The receiver 45 provided on the front upper surface of the machine base 3 has a
A potentiometer 46 for detecting the elevation angle of the preprocessing device 7 is screwed onto the potentiometer 46, and a detection arm 47 protruding from the potentiometer 46 is connected to the connecting pin 33 by a connecting rod 48.

Further, the transmission case 50, which serves as a driving portion of the handling depth adjustment device, is rotatable around the horizontal shaft holding cylinder 16, and has a shaft protruding upward from which the stock conveying belt 13 is attached.
A sprocket 51 that engages is attached, and a locking member 53 having an upward groove 52 is fixed on the rear surface.A lifting drive device 57 is mounted on a U-shaped bracket 55 on the machine base 3 and can be tilted back and forth by a fulcrum pin 56. A locking pin 65 fixed to the upper end of the locking member 53 is adapted to be engaged with and disengaged from the groove 52 of the locking member 53, and the lifting drive device 57 has a U-shape as shown in FIGS. 8 to 10. A threaded rod 61 is rotatably supported in a cylindrical body 59 integral with the shaped frame 54 via bearings 60, 60, and a pair of balls 6 are fitted into the threaded grooves of the threaded rod 61.
2, 62 is held by a ring 63, and this ring 63
The locking pin 65 in the horizontal direction is fixed to the upper end of the elevator cylinder 64 connected to the upper part of the plate 66 fixed to both ends of the locking pin 65 and both sides of the upper surface of the U-shaped frame 54. A pair of left and right springs 67,6
The U-shaped bracket 55 and the U-shaped frame 54 are connected by a toggle spring 59a that crosses the fulcrum pin 56 back and forth. There is,
A limiter 69 having stoppers 68, 68 at the upper and lower parts is screwed onto the rear surface of the pipe 63a fixed to the lower part of the ring 63 and fitted into the cylinder 59. An upper limit switch 71 and a lower limit switch 72 are attached to the stay 70 which is erected on the side.

Further, a worm gear 73 attached to the lower end of the screw rod 61 is engaged with a worm attached to the shaft of a reduction motor 74.

The cylindrical body 75, on which the shafts to which the raking wheel 10, the drive sprocket of the stock raking chain 11, and the drive pulley of the stem raking belt 12 are attached, is supported internally is fixed to the horizontal pipe 19b and is erected. A stand 77 is supported by a pipe 76 and is inserted into and removed from the lower part of the pipe 76. A stand 77 has a grounding plate 78 at its lower end.
9, 79..., select one of the holes 79..., insert the fixing pin 80 into this hole 79 and the hole 79a of the pipe 76, and fix it with the spring pin 81. It can be converted into a retracted position shown by a solid line in the figure and a protruding position shown by a chain line.

Next, to explain the operation, when performing reaping and threshing work, the horizontal shaft holding cylinder 16 is moved to the receiver 23,
23 and tightened with the locking levers 25, 25 and nuts 27, 27, and the upper part of the rotation restrictor 35 is connected to the fixing member 42 by the upper connecting pin 44.
When the hydraulic cylinder 32 is connected as shown in the figure, and the cutting height is adjusted during work, or when the pre-processing device is moved up and down greatly for traveling on the road, the hydraulic cylinder 32 is extended and retracted, and the pre-processing device holds the horizontal shaft holding cylinder 16. The pulley 82 of the input shaft tilts up and down around the center, and during work, the power of the engine is supported by the horizontal shaft holding cylinder 16.
When driven, each part of the reaping device is driven via the horizontal shaft in the shaft holding cylinder 18 and the transmission case 17, etc., and the handling depth adjustment device is controlled by the upper transmission case 50.
The erect grain culms are harvested by a reaping device similar to the conventional one, and are transported rearward by a handling depth adjustment device and threshed by a threshing device 1. When the height of the pretreatment device is set using a setting device installed in When the deceleration motor 74 rotates in the forward or reverse direction based on , the screw rod 61 rotates,
The handling depth adjusting device tilts up and down together with the transmission case 50 around the horizontal shaft holding cylinder 16. This tilting range is limited by the state in which the upper plate 66 is in contact with the lower limit switch 72, as shown by the solid line in FIG. 8, and the state in which the lower plate 66 is in contact with the upper limit switch 71, as shown in chain lines. In addition, the handling depth adjustment device has its center of gravity at the horizontal axis holding cylinder 16.
Since it is located further forward, when adjusting the shallow handling by tilting it upward, the springs 67, 67 bias the handling depth adjusting device upward to reduce the load on the deceleration motor 74.

When servicing the pre-processing device or the counter case or mission case on the side of the operating section, lower the pre-processing device until its front part touches the ground, and then press the lever above the pulley 82. Rotate the panel to open it, remove the belt hanging from the pulley 82, and tighten the nuts 27, 27.
, rotate the locking levers 25, 25 forward, and prepare to separate the pretreatment device from the aircraft by removing the control circuit coupler, etc., and lift the front part of the handling depth adjustment device to the rear. When the locking member 53 protruding from the upper end of the lifting drive device 57 is removed from the locking pin 65 at the upper end of the lifting drive device 57 and the lifting drive device 57 is tilted backward, the toggle spring 59a causes the locking member 53 to be tilted backward as shown by the solid line in FIG. is maintained.

Furthermore, a mounting bracket 36 on the upper part of the rotation restricting tool 35 is provided.
is removed from the fixing member 42 and connected to the fixing member 40 of the support member 20 with an upper connecting pin 44. that time,
If the ground plane of the pretreatment device is higher or lower than the traveling device 2, the holes in the mounting bracket 36 of the rotation restricting device 35 and the holes 41 in the fixing member 40 will not match, so the turnbuckle 37 should be operated to adjust the expansion and contraction. Match both holes.

When the hydraulic cylinder 32 is pushed out and operated in this state, the connecting pin 33 at the tip of the hydraulic cylinder 32 is moved by the rotation restrictor 35.
As shown in FIG. 2, the bracket 28 and the preprocessing frame 15 are pushed diagonally forward and upward along the trajectory A around the upper connecting pin 44 as shown in FIG.
The horizontal shaft holding cylinder 16 is detached from the receiver 23.

In this state, remove the stop pin 80 and stand 77.
The machine is pulled out as shown by the chain line in Fig. 2, and the fixing pin 80 is inserted into the hole 79 above it to secure it.Then, the aircraft is moved backwards until the necessary space is obtained for the maintenance work, and the desired maintenance work is completed. can be done.

When the machine is moved forward to install the pretreatment device after maintenance work, the connecting pin 33 is connected to the bracket 2.
In some cases, the pipes 39, 39 may not align with the recesses 30, 30 at the recesses 30, 30 by adjusting the expansion and contraction with the turnbuckles 37.
30 and after the stand 77 is retracted and the hydraulic cylinder 32 is contracted, the preprocessing device tilts downward while being regulated by the rotation restricting device 35.
The horizontal shaft holding cylinder 16 has an opening 24 in the receivers 23, 23,
24, so perform the coupling operation that is the reverse of the above-mentioned detachment operation. When the connection is completed, the upper mounting bracket 36 of the rotation restrictor 35 is attached to the fixing member 42 of the shaft holding cylinder 18.

Furthermore, by manually tilting the handling depth adjusting device upward and tilting the lifting drive device 57 forward, the locking pin 65 at the upper end thereof faces directly above the upward groove 52 of the locking member 53. When the handling depth adjusting device is tilted downward in this state, the locking member 53 rotates upward and fits into the locking pin 65, so that they are linked together at once.

Furthermore, if the locking member 53 is formed in an arc shape on the rear surface as shown in FIG. 4a, the lifting drive device 57
When connecting the locking member 53 with the lifting drive device 57, the lifting drive device 57 is tilted forward and the locking pin 65 at the upper end is pressed against the rear surface of the locking member 53 by the action of the toggle spring 59a. When the adjustment device is tilted upward, the locking pin 65 automatically fits into the groove 52 of the locking member 53. 83 is a stopper.

(G) Effects of the Invention As described above, the present invention includes a handling depth adjustment device which is attached to a support member on a machine platform 3 on which a threshing device 1 is mounted, and which includes a reaping device and a grain culm carrier that swings vertically around its rear part. In a combine harvester in which a pre-processing device composed of the above is attached to a support member 20 in a removable and vertically tiltable manner, a locking member 53 is provided at the rear of the handling depth adjusting device and protrudes rearward from its swing fulcrum. , a lifting drive device 57 provided at the rear of the support member 20
The upper part of the handleable depth adjusting device is connected to the locking member 53 so as to be engaged and disengaged by vertically swinging the handling depth adjusting device, so that a lifting drive device can be renovated between the handling depth adjusting device and the pretreatment frame. There is no need to make an unreasonable design to store it in a narrow space, and there are no restrictions on the range of adjustment of the handling depth.

Furthermore, when the pretreatment device is removed and installed, the upper part of the elevating drive device 57 can be engaged and disengaged from the locking member 53 with an extremely simple operation by lifting the handling depth adjustment device.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a side view of the pre-processing frame with it grounded, Figure 2 is a side view showing the attachment/detachment operation device for the pre-processing device, Figure 3 is an exploded perspective view of the main parts, and Figure 4 a is the handling depth. A side view showing a state in which the elevating device of the height adjustment device is attached and detached; b is a side view showing another example of the locking member;
The figure is a side view showing the pre-processing device and the stand.
The figure is an exploded perspective view of the stand and reaping frame.
The figure is a perspective view of the combine, FIG. 8 is a side view of the lifting device, FIG. 9 is a vertical front view, and FIG. 10 is a plan view of the same. 1... Threshing device, 15... Pre-processing frame, 1
6... Horizontal shaft holding cylinder, 23... Receiver, 32... Hydraulic cylinder, 33... Connection pin, 35... Rotation restrictor, 52... Groove, 53... Locking member, 57... Lifting Drive device, 61...screw rod, 65...locking pin,
67...Spring.

Claims (1)

[Claims] 1. A pre-processing device consisting of a reaping device and a handling depth adjustment device consisting of a grain culm carrier that swings up and down centering on the rear part is attached to the support member 20 on the machine base 3 on which the threshing device 1 is mounted. In a combine harvester which is detachably attached to and can be tilted up and down, a locking member 53 is provided at the rear of the handling depth adjusting device and protrudes rearward from its swing fulcrum, and a lifting drive provided at the rear of the support member 20 is provided. A pre-processing attachment/detachment device for a combine harvester, characterized in that an upper part of the device 57 is connected to the locking member 53 so as to be engaged and detached by vertically swinging a handling depth adjusting device.