JPH0411480Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an improvement of a culm cutting device that allows high-speed and low-speed rotating shafts to be easily, safely and reliably attached and detached in a disc-type cutter. .

[Prior art and its problems] In a disc-type cutter, a high-speed rotating shaft with a large number of disk blades and a low-speed rotating shaft equipped with a feeding body that engages the outer peripheral edge of the disk blades are connected to both ends of the cutter. A culm cutting device that is detachably connected to a short shaft supported on a case (frame) has already been proposed. However, in order to attach and detach the rotary shaft from the short shaft in this way, it is difficult to create a mechanism to move the rotary shaft in the axial direction because the disc blade and the feeder are in an interlocking relationship, and a complicated mechanism is required. There are issues such as the structure.

In addition, in order to solve these problems, a mechanism in which the engagement between the rotating shaft and the short shaft has a key structure is shown in Japanese Utility Model Publication No. 50-231895 and Japanese Utility Model Publication No. 55-30120. , this item does not have any measures taken for the means to engage the key structure in a stable state, and the operation of attaching and detaching the rotating shaft is unstable, and the longitudinal axis of the key structure is directed downward. There remains the problem that there is a risk that the rotating shaft may fall when in this position.

The purpose of the present invention was to solve the problems of the conventional technology by simple yet rational means, and to provide a culm cutting device that allows the rotating shaft to be attached and detached in a safe posture. We aim to provide the following.

[Means for Solving the Problems] The structure of the present invention that solves the problems of the prior art includes a high-speed rotating shaft equipped with a large number of disk blades forming a disk-type cutter connected to the culm discharge port of the threshing device. , both ends of a low-speed rotating shaft provided with a feeding body facing the disk blade are supported by a frame body, and
A connecting recessed groove is detachably connected to the end shafts connected by mutually meshing gears, and has an axis perpendicular to the axial direction of the rotating shaft, and connects the butt connecting portion of the short shaft and the high speed and low speed rotating shafts. A culm cutting device having a key structure consisting of a connecting protrusion and a large-diameter gear provided at the outer end of a short shaft corresponding to the low-speed rotating shaft, and/or a short shaft corresponding to the high-speed rotating shaft. A hole is formed on one side of the pulley provided at the outer end of the pulley, and a line connecting the hole and the center of the short axis is orthogonal to the axes of the connecting groove and the connecting protrusion in the engagement relationship, A locking tool is provided on the outer surface of the cutter case corresponding to a vertical line passing through the center of both of the short axes, and has a hook part that can be fitted into and removed from the hole, and has a vertical position along the vertical line. It's an octopus.

[Example] An embodiment of the configuration of the present invention will be described with reference to the drawings.

Fig. 1 is a partially cutaway front view of the disc-type cutter, Fig. 2 is a side view of the same, Fig. 3 is a longitudinal sectional front view of a portion of the same, Fig. 4 is an exploded perspective view of the short shaft and connecting shaft cylinder, FIG. 5 is a partially cutaway perspective view of the connecting fastener.

As shown in FIG. 1, a cutter case 1 has a low-speed rotating shaft 2 and a high-speed rotating shaft 3 mounted parallel to each other with a required spacing therebetween.

In the present invention, the high-speed and low-speed rotating shafts 2 and 3 are detachable and replaceable with respect to the cutter case 1, and the structure is the same for both rotating shafts.
We will explain the details of the structure of the high-speed rotating shaft 3, which is particularly frequently replaced, and the structure of the low-speed rotating shaft 2.
Detailed explanation thereof will be omitted by assigning the same reference numerals.

The high-speed rotating shaft 3 has a polygonal hexagonal cross-section. Reference numeral 4 denotes a disk blade fitted into the high-speed rotating shaft 3, and a pipe receiving plate 5 is provided on one side of the disk blade, and a holding plate 6 is provided on the other side. A wrapping prevention pipe 7 is interposed between each pipe receiving plate 5 and the holding plate 6 to position the interval between each disc blade 4 and to prevent the cut culm from wrapping around. be.

On both side frames 1a of the cutter case 1, a short shaft 8 having a disk-shaped flange 8b having a screw 8a on the outer periphery is supported at the inner end thereof by a bearing 9, and the inner side of the flange 8b is supported by a bearing 9. On the side surface, as shown in FIG. 4, there is a connecting groove 8c in the diametrical direction.
is formed.

Reference numeral 10 denotes a disc-shaped flange 1 in which a connecting protrusion 10a that fits into the connecting groove 8c is formed in the diametrical direction.
A small-diameter shaft portion 3a integrally formed with the high-speed rotating shaft 3 is inserted into the connecting shaft cylinder 10. A key 3b is attached to this small diameter shaft portion 3a.
is installed, and this is the shaft hole 10 of the connecting shaft cylinder 10.
The high-speed rotating shaft 3 and the connecting shaft cylinder 10 are connected to each other by fitting into the key groove 10d provided in the flanges 8b and 10b. The grooves 8c and the connecting protrusions 10a are connected by fitting, and the rotation transmitted to the short shaft 8 is transmitted to the high-speed rotating shaft 3.

In addition, small diameter shaft portions 3 provided at both ends of the high-speed rotating shaft 3
a are fitted into the connecting shaft tube 10, respectively, and the end surface of the small diameter shaft portion 3a and the shaft hole 1 of the connecting shaft tube 10 are connected to each other.
The condition is that the configuration is such that a gap is left between the deepest part of 0c. Further, as shown in the figure, the connecting shaft cylinder 10 has a key groove 10d provided therein.
A screw hole 10e is formed leading to the screw hole 10e, and a tightening bolt 11 is screwed into the hole 10e, so that the connecting shaft cylinder 10 and the small diameter shaft portion 3a of the high-speed rotating shaft 3 are fixed. By loosening the bolt 11, the high-speed rotating shaft 3 can be moved along its axial direction.

12 is a connecting fastener having a cap nut structure;
The inner surface of this is formed with a threaded portion 12a that is screwed into the thread 8a of the flange 8b, and a stepped surface 12b that fits the outer circumferential surface of the flange 10b and the inner outer circumferential surface of this flange 10b. The outer surface of the connecting fastener 12 is provided with a plurality of engagement holes 12c into which rotating tools (not shown) thereof are engaged.

13 is a flange 9a formed on the bearing 9;
A short cylindrical body provided inside the short cylindrical body 13, into which the outer edge of the connecting fastener 12 is fitted, and a pipe receiving plate 5 and a holding plate 6 of the disc blade 4 at both left and right ends. The outer end surfaces of the anti-wrapping pipes 7 disposed between the flange 10b of the connecting shaft cylinders 10 are fitted inside the inner ends of the connecting fasteners 12, respectively, so that the cutting culm etc. can be inserted between each member. This is to prevent interference with Further, on one side of the wrapping prevention pipe 7 disposed at the outermost side, that is, the wrapping prevention pipe 7 that covers the outside of the connecting shaft cylinder 10, a tightening bolt attached to the connecting shaft cylinder 10 is provided. bolt 1
A bolt driver (not shown) is inserted through this hole 14 so that the tightening bolt 11 can be rotated.

In the figure, reference numeral 15 denotes a small diameter gear fixed to one of the short shafts 8 of the high speed rotation shaft 3, and the gear 15 is meshed with a large diameter gear 16 provided to one of the short shafts 8 of the low speed rotation shaft 2. There is. In addition, 17 is the short axis 8 of the high-speed rotating shaft 3.
A pulley 17 is provided at the end for transmitting driving force, and the large-diameter gear 16 is provided with a hole 18 for connecting a locking device, which will be described later.

As shown in FIGS. 2 and 3, on one side frame 1a of the cutter case 1, two mounting pieces 19 corresponding to the vertical line passing through the center of the short axis 8 are perpendicular to the plate surface of the side frame 1a. a locking tool 2 in a vertical position, which is provided with a hook portion 20a that engages with the hole 18;
0 is inserted through the locking tool 20, and a tightening nut 21 is screwed into the lower end of this locking tool 20.
1 locks the pulley 17 or the large-diameter gear 16, and the rotation of the low-speed and high-speed rotating shafts 2 and 3 associated therewith is prevented. Loosen the tightening nut 21 and remove the locking tool 20.
Of course, by removing the tip end hook portion 20a from the hole 18, both rotating shafts 2 and 3 are released. Then, as shown in FIG.
0 and the hole 18, the connection groove 8c formed on both flanges 8b, 10b and the connection protrusion 10b are aligned with the line connecting the hole 18 and the center of the short axis 8. The positional relationship is determined so that the longitudinal axes are substantially orthogonal, and the longitudinal axes of the connecting groove 8c and the connecting protrusions 10a are horizontal or close to this, and when the connecting fastener 12 is released, This is to prevent both rotating shafts 2 and 3 from accidentally falling when the coupling relationship between flanges 8b and 10b is released.

In the figure, reference numeral 22 denotes a rear cover that is attached to the cutter case 1 so as to be openable and closable, and the two rotation shafts 2 and 3 are attached and detached with this rear cover 22 open. 23 is a threshing device, 24 is a waste culm conveyor, and 25 is a switching plate for switching between sending the waste culm to a cutter mechanism or to a culm collecting device (not shown).

Further, 26b is a feeding disk for feeding the discharge culm into the disc blade 4 for cutting, 26b is a feeding flange, and the feeding body 26 is constituted by the feeding disk 26a and the feeding flange 26b.

Note that, as mentioned above, the structure of the low-speed rotating shaft 2 is the same as that of the high-speed rotating shaft 3, with some exceptions.
Identical components are represented by similar symbols.

[Description of operation] To explain the operation of the present invention based on the above embodiment, when installing the high-speed rotating shaft 3 to the cutter case 1, first, the hole 18 of the pulley 17 provided at one end of the short shaft 8 is opened. Then, as shown in FIG. 2, the hook portion 20a of the locking tool 20 is engaged and tightened with the tightening nut 21 to prevent the short shaft 8 from rotating. At this time,
The connecting groove 8c of the flange 8b of the short shaft 8 is in a horizontal state. Then, the other short shaft 8 is manually rotated to keep the connecting groove 8c in a horizontal state. Next, the high-speed rotating shaft 3 with the connecting shaft cylinder 10 freely attached thereto is interposed between both short shafts 8 by the operator, and the connecting shaft cylinder 1
After fitting the connecting protrusion 10a provided on the flange 10b of 0 into the horizontal connecting groove 8c from the side,
The threaded portion 12a of the connecting fastener 12 is fitted into the thread 8a of the flange 8b of the short shaft 8, and the cross section 12b of the connecting fastener 12 is adapted to the outer circumferential surface and the inner outer circumferential surface of the flange 10b of the connecting shaft cylinder 10. Connect the short shaft 8 and the connecting shaft cylinder 10 by pressing, connect the outer end of the connecting fastener 12 to the inside of the short cylinder 13 of the bearing 9, and connect and tighten the outer ends of the anti-wrapping pipes 7 at both ends. It is fitted inside the inner end of the tool 12. Next, hole 1 made in pipe 7
4, insert a bolt driver and tighten the tightening bolt 11 to connect and fix the connecting shaft cylinder 10 and the small diameter shaft portion 3a of the high speed rotating shaft 3.

The low-speed rotary shaft 2 is attached by a similar operation, and the tip of the disc blade 4 is inserted into the groove formed on the outer periphery of the feeding body 26 of the low-speed rotating shaft 2. To adjust the meshing position between the two, loosen the tightening bolt 11 and slightly move the rotating shafts 2 and 3 in either direction in the axial direction to adjust the meshing properly.
Tighten and fix the tightening bolt 11 again. In this operation explanation, the high-speed rotating shaft 3 was installed first, but
The high speed rotation shaft 3 may be installed after the low speed rotation shaft 2 is installed, and this order is not specified. Of course, the locking by the locking tool 20 can be released after the attachment is completed.

[Effects of the Invention] As described above, according to the configuration of the present invention, the following effects can be obtained.

(a) Since the short shaft and the high-speed and low-speed rotating shafts can be pressed against each other by the key structure at the abutting surfaces, connection can be achieved only by movement in a direction perpendicular to the axis of the rotating shaft; It goes without saying that the meshing relationship between the disk blade and the feeding body can be easily achieved, and the structure can be simplified. In this state, the axis of the key structure can be held horizontally or nearly horizontally, so the operation of attaching and detaching the rotary shaft to and from the short shaft is performed in a stable posture, preventing the rotary shaft from falling accidentally. There is no fear at all.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view, Fig. 2 is a side view of the same, Fig. 3 is a longitudinal sectional front view of the main part, Fig. 4 is an exploded perspective view of the short shaft and connecting shaft cylinder, and Fig. 5 is a connecting fastener. FIG. 3 is a partially cutaway perspective view of the attachment. 1...Cutter case, 2...Low speed rotating shaft, 3
...High speed rotating shaft, 3a...Small diameter shaft portion, 4...Disc blade, 7...Wrap prevention pipe, 8...Short shaft, 8a...
...screw, 8b...flange, 8c...connection groove,
9...Bearing, 10...Connection shaft cylinder, 10a...Connection protrusion, 10b...Flange, 10c...Shaft hole, 1
0d...Keyway, 11...Tightening bolt, 12...
Connection fastener, 12a... Threaded portion, 12b... Step surface, 12c... Engagement hole, 14... Hole, 16... Large diameter gear, 17... Pulley, 18... Hole, 19...
...Mounting piece, 20...Locking tool, 20a...Hook portion, 21...Tightening nut.

Claims (1)

[Claim for Utility Model Registration] A high-speed rotating shaft equipped with a large number of disk blades constituting a disk-shaped cutter connected to the culm discharge port of a threshing device, and a low-speed rotation shaft equipped with a feeding body facing the disk blades. Both ends of the shaft are removably connected to an end shaft that is supported by a frame and connected by mutually meshing gears, and a butt connection portion between the short shaft and the high speed and low speed rotation shafts, In a culm cutting device with a key structure consisting of a connecting groove and a connecting protrusion having an axis perpendicular to the axial direction of the rotating shaft, a large-diameter gear is provided at the outer end of the short shaft corresponding to the low-speed rotating shaft. , and/or a hole is formed on one side of each pulley provided at the outer end of the short shaft corresponding to the high-speed rotating shaft, and a line connecting the hole and the center of the short shaft is connected to the The cutter case has a hook part that can be fitted into and removed from the hole on the outer surface of the cutter case, which is perpendicular to the axes of the connecting groove and the connecting protrusion, and which corresponds to a vertical line passing through the centers of both of the short axes, and
A culm cutting device characterized in that a locking tool is provided in a vertical position along the vertical line.