JPH0568205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a pretreatment attachment/detachment device for a combine harvester for attaching and detaching a pretreatment device to/from a machine body.

(b) Prior art Conventionally, the upper part of a preprocessing frame is rotatably and removably connected to a support member installed upright on a machine stand.
The rear upper part of the pretreatment frame is supported so as to be rotatable and detachable in the front-rear direction, and the rear lower part of the pretreatment frame is attached to the support member via a bendable and extensible F-shaped link frame. The link frame is connected to the lower part of the front member of the link frame, and the lower part of the front member of the link frame is connected to the lower part of the link frame. JP-A-Sho published a combine harvester in which the pre-processing device was detached by pushing out the front member of the link frame with a hydraulic cylinder while connected to the support member.
This was already proposed in the publication No. 62-171615.

(C) Problems to be Solved by the Invention The above-mentioned known invention can be applied to a type in which the pre-processing device is attached to a support member using a bendable and extensible F-shaped link frame, but it cannot be applied to a threshing device. The upper part of the shaft holding cylinder, which also serves as a part of the preprocessing frame, is supported on a support member on the mounted machine base so as to be rotatable and detachable in the front and rear direction, and the lower part of the shaft holding cylinder is A combine harvester, in which the base is connected to a hydraulic cylinder pivotally supported on the machine base or a member integral with the machine base, and a pre-processing device is mounted so that it can be tilted up and down by the expansion and contraction of the hydraulic cylinder, that is, it has an F-shaped link frame. It could not be applied to a combine that does not.

(d) Means for Solving the Problems The present invention provides a support member on a machine base on which a threshing device is mounted, so that the upper part of a shaft holding cylinder which also serves as a part of a preprocessing frame can be rotated and moved in the front and back direction. The receiving member of the shaft holding cylinder is connected to a hydraulic cylinder whose base is pivotally supported on the machine base or a member integral therewith, and the preprocessing device is moved up and down by the expansion and contraction of the hydraulic cylinder. In the combine harvester that is tiltably mounted, a connecting pin at the front of the hydraulic cylinder is removably connected to a receiving member of the shaft holding cylinder, and the connecting pin and the support member are connected by a rotation restrictor,
By making at least one end of the rotation restricting tool 35 removable, the preprocessing device of a combine harvester in which the preprocessing device is directly raised and lowered by a hydraulic cylinder without going through a doglegged link frame can be attached and detached with a simple configuration. The above-mentioned problem was solved by making it possible.

(E) Action When the hydraulic cylinder is expanded or contracted during work or when traveling on the road, the pretreatment device tilts up and down around the upper end of the shaft holding cylinder, separating the pretreatment device from the threshing device and moving it away from the transmission section or the front. When servicing the processing device, the upper end of the shaft holding cylinder is unlocked from the supporting member of the horizontal shaft holding cylinder, and the transmission relationship between the preprocessing device and its drive unit is released so that they can be separated. When the connecting pin at the front of the hydraulic cylinder and the support member are connected with the rotation restrictor and the shaft holding cylinder is pushed out using the hydraulic cylinder, the connecting pin at the front of the hydraulic cylinder will move around the fulcrum pin at the other end of the rotation restrictor. As the pretreatment device rotates upward, the preprocessing device rotates upward around its front portion, and the horizontal shaft holding cylinder separates from the receiving portion at the upper end of the support member.

In this state, when the pre-processing device is supported by a suitable stand or the like and the aircraft is moved backwards, the connecting pin at the front of the hydraulic cylinder separates from the receiving member of the shaft holding cylinder.
Space for said maintenance is obtained.

When installing the preprocessing device after maintenance work, move the machine forward, lock the connecting pin at the front of the hydraulic cylinder to the receiving member of the shaft holding cylinder, release the support from the stand, etc., and then install the hydraulic When the cylinder is contracted, the pretreatment device rotates downward around the front part, and the upper end of the shaft holding cylinder fits and locks with the upper end of the support member, making the transmission possible for transmission. Cancel the connection by.

(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 a cutting body 8..., a grain culm triggering body 9..., a raking ring 10
..., a cutting device consisting of a stock head raking chain 11, a stem part scraping body 12, etc., and a handling depth adjustment device consisting of a stock base conveyance belt 13 with a clamping rail and a panicle side conveyance belt 14 with a guide rod. The pretreatment frame 15 is composed of a shaft holding cylinder 18 having a horizontal shaft holding cylinder 16 fixed to its upper end, a horizontal transmission case 17 fixed to its lower end, and a reaping frame fixed to the transmission case 17. It consists of 19. 19a 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 and 20 have upper parts connected by a horizontal frame 21, stays 22 and 22 protruding from the rear surface connected to the front wall of the thresher 1, and a receiver 23 fixed to the upper end of the support members 20 and 20. 23 has openings 24, 24 facing diagonally forward and upward; these openings 24,
24 with the horizontal shaft holding cylinder 16, and open the opening 2.
Locking levers 25, 25 pivoted on the lower side of 4, 24
is rotated rearward to fit fixing bolts 26, 26 into holes in their intermediate portions, and are tightened with nuts 27, 27 to hold it rotatably.

Then, a support pin 31 whose base is attached to the machine base 3 is inserted into a recess 30 at the rear end of the receiving members 28, 28, which are a pair of brackets welded to the rear surface of the shaft holding cylinder 18.
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 on the upper part, a turnbuckle 37 or an appropriate expansion/contraction adjustment part is interposed in the middle part, and a downward U-shaped metal 38 is fixed to the lower end. The pipes 39, 39 at the lower part of the U-shaped metal 38 are connected by fitting into the connecting pin 33, and a fixing member 4, which is L-shaped in plan view and protrudes from the inner surface of the supporting member 20, is connected.
0 (hole 41) is a portion where the distance from the connecting pin 33 is approximately equal to the length of the rotation restrictor 35 in the state shown in FIG. A hole 41 drilled in the fixing member 40 and a hole 43 bored in the fixing member 42 protruding from the upper rear surface of the shaft holding cylinder 18 are provided on an arc centered on the connecting pin 33. , upper mounting bracket 3
6 is connected to the fixing member 40 or 42 by an upper connecting pin 44.

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 removably inserted into the pipe 76 from the lower part thereof, and has a ground plate 78 at its lower end.
a, 79..., select one of the holes 79..., insert a fixing pin 80 into this hole 79 and the hole 79a of the pipe 76, and fasten it with a spring pin 81, as shown in Fig. 5. It can be converted into a retracted position shown by a solid line 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 8 of the input shaft tilts up and down around the center and is supported by the horizontal shaft holding cylinder 16 by the power of the engine during work.
2, 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, remove the coupler of the control circuit, etc., to prepare the pretreatment device for separation, and lift the front part of the handling depth adjustment device and move it in the direction. When the protruding locking member 53 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 it to tilt backward as shown by the solid line in FIG. It 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.
The horizontal axis holding cylinder 1 is regulated by
6 leaves 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, the fixing pin 80 is inserted into the hole 79 above it, and the machine is fastened.Then, the machine is moved backwards until the necessary space is obtained for the maintenance work, and the desired maintenance work can be carried out. can be done.

When the machine is moved forward to assemble the pretreatment device after maintenance work, the connecting pin 33 is connected to the receiving member 28,
28 may not coincide with the recesses 30, 30. In such a case, the turnbuckles 37 are used to adjust the expansion and contraction of the pipes 39, 39 to the recesses 30, 30.
After fitting the stand 77 and storing the stand 77,
When the hydraulic cylinder 32 is contracted, the pretreatment device tilts downward while being regulated by the rotation restrictor 35, and the horizontal shaft holding cylinder 16 closes to the openings 24, 24 of the receivers 23, 23.
Since they fit together, perform the coupling operation that is the reverse of the above-mentioned detachment operation. Once the connection is completed, the rotation restrictor 35
Attach the upper mounting bracket 36 to the fixing member 4 of the shaft holding cylinder 18.
Attach to 2. 83 is a stopper.

Lift the handling depth adjusting device by hand and insert the locking pin 65 at the upper end of the lifting drive device 57 into the groove 5 of the locking member 53.
2.

(g) Effects of the Invention As described above, the present invention includes a structure in which the upper part of the shaft holding cylinder 18, which also serves as a part of the preprocessing frame 15, is rotatable on the support member 20 on the machine base 3 on which the threshing device 1 is mounted. The receiving member 28 of the shaft holding cylinder 18 is connected to a hydraulic cylinder 32 whose base is pivotally supported by the machine base 3 or a member integral therewith. In the combine harvester, in which the pre-processing device 7 is mounted so as to be tiltable up and down by the telescopic operation of The connecting pin 33 and the support member 20 are connected by the rotation restrictor 35, and at least one end of the rotation restrictor 35 is made removable, so that the support member 20 and the shaft holding cylinder 18 of the preprocessing frame 15 are connected.
The hydraulic cylinder 32 can be adjusted and connected to the pretreatment frame 15 by the rotation restrictor 35, thereby significantly simplifying the configuration, reducing costs and reducing weight. The configuration can be further simplified by using a single connecting pin that also serves as the connecting means for connecting the restrictor 35 to the preprocessing frame 15.

[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 is the handling depth. FIG. 5 is a side view showing the pretreatment device and the stand; FIG. 6 is an exploded perspective view of the stand and reaping frame; FIG. 7 is a perspective view of the combine harvester. , FIG. 8 is a side view of the lifting device, FIG. 9 is a longitudinal sectional front view, and FIG. 10 is a plan view of the same. 1... Threshing device, 3... Machine stand, 15... Pre-processing frame, 16... Horizontal shaft holding cylinder, 23... Receiver,
24...Opening, 32...Hydraulic cylinder, 33...
...Connecting pin, 35... Rotation restrictor, 40, 42...
...Fixed member.

Claims (1)

[Claims] 1 Support member 2 on the machine stand 3 on which the threshing device 1 is mounted
0, the upper part of the shaft holding cylinder 18, which also serves as a part of the preprocessing frame 15, is supported so as to be rotatable and detachable in the front-rear direction, and the receiving member 2 of the shaft holding cylinder 18 is
8 is coupled to a hydraulic cylinder 32 whose base is pivotally supported by the machine base 3 or a member integral therewith, and the pre-processing device 7 is mounted so as to be tiltable up and down by the expansion and contraction operation of the hydraulic cylinder 32. A connecting pin 33 at the front of the cylinder 32 is removably connected to the receiving member 28 of the shaft holding cylinder 18,
A pre-processing attachment/detachment device for a combine harvester, characterized in that the connecting pin 33 and the support member 20 are connected by a rotation restriction device 35, and at least one end of the rotation restriction device 35 is made detachable.