JP2001300891A - Journaling structure for stem/culm cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a change of cutters 32 and an adjustment to the clearance between receiving members 42 and the cutters 32 by facilitating the attachment and detachment of a cutter shaft 3 to and from a frame 2. SOLUTION: A stem/culm cutter comprises the plurality of rotary blades 32 for cutting a stem/culm into a given cut length, on the cutter shaft 30 rotatable in a cutting direction. The cutter shaft 30 is divided into support shafts 30a and 30b rotatably journaled on both sides of the cutter frame 2, and a cutter mounting shaft 35 carrying the cutters. The cutter mounting shaft 35 is fixed, for adjustive axial movement, to the support shafts 30a and 30b, so that the clearance is adjustable between the rotary blades 32 and the receiving members 42 opposed thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a shaft support structure of a stem / culm cutting device installed in a combine or a reaper.

[0002]

2. Description of the Related Art Conventionally, a stalk and stem cutting device of a disk cutter type mounted on a threshing unit of a combine uses one of two parallelly arranged cutter shafts that rotate inward with each other.
A support shaft rotatably supported via a bearing on the cutter machine frame on both sides, and a cutter mounting shaft in which a plurality of disk-shaped cutters having saw blades formed on the outer periphery and arranged at predetermined intervals are located therebetween. And each shaft is integrally connected with a joint. A plurality of receiving members for stems and stems are provided at a predetermined interval on the other one of the other cutter axes parallel to the cutter axis at a position facing the cutter.

[0003] A cutter and a collar are alternately fitted and arranged on the cutter mounting shaft, and a threaded portion is provided at an end of the cutter mounting shaft on the spike side where the cutting load is small. In this state, the cutter mounting shaft is connected to both ends of the cutter mounting shaft via a joint in a butted state in which no gap is formed.

Therefore, in order to cut the stem efficiently, it is necessary to adjust a delicate gap between the cutter provided on the cutter mounting shaft and the receiving member provided on the other cutter shaft. However, as means for this, a plurality of liners are sandwiched between a bearing for rotatably supporting a support shaft and a cutter machine frame, and the thickness of the liner is adjusted.

[0005]

The stem and stalk cutting device of the above-mentioned conventional construction comprises a cutter provided at a predetermined interval on a cutter mounting shaft and a receiving member for stems and culms provided at predetermined intervals on another cutter shaft. The adjustment is complicated because the liner is interposed between the bearings provided on the cutter machine frame to finely adjust the gap between them.

Also, the cutter located at the base of the stalk and having rigidity of the culm has greater abrasion than that of the spike, and therefore, it is necessary to replace the cutter at the spike only at any time while leaving the cutter at the spike. Although there is a need to adjust the gap between the cutter and the receiving member when replacing the cutter or adjusting the cutting state, this adjustment is complicated in the structure of the conventional apparatus.

Further, in the conventional apparatus, the cutter must be replaced by removing the entire cutter mounting shaft and the supporting shafts at both ends of the machine from the machine frame, so that the replacement work of the cutter must be large. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and cuts a stem to a predetermined cutting length on a cutter shaft 30 which rotates in a cutting direction. In a stem / culm cutting device having a plurality of rotary blades 32, the cutter shaft 30 is divided into support shafts 30a and 30b that rotatably support the cutter shaft 30 on both sides of the cutter frame 2, and a cutter mounting shaft 35 having a cutter. In addition, the cutter mounting shaft 35 is attached and fixed to the support shafts 30a and 30b so as to be movable in the axial direction, and the gap between the opposed receiving blades 42 is adjustable.

Further, the cutter shaft 30 is divided into support shafts 30a and 30b rotatably supporting on both sides of the cutter frame 2 and a cutter mounting shaft 35 having a cutter.
5 and the support shafts 30a and 30b are connected via shaft joints 5 and 5a, and the cutter mounting shaft 35 is slid at the portions of the shaft joints 5 and 5a to rotate the rotary blade 32 and the rotary blade 3.
2 is characterized in that the gap between the receiving member 42 and the opposing receiving member 42 can be adjusted.

Further, the shaft joints 5, 5a are connected to the support shaft 30.
a and a portion for supporting the joining portions at both ends of the cutter shaft 30 in a half-split shape, one side at a time.
It is characterized in that it is configured to be able to temporarily support the end of the zero.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, a stem and stem cutting device according to the present invention can easily adjust a gap between a cutter provided on a cutter shaft and a receiving member provided on another parallel cutter shaft. The form of the shaft support structure will be described.

In FIGS. 1 and 2, reference numeral 1 denotes a disc-stem type stem / culm cutting device mounted on a combine (not shown) for chopping grain stems discharged from a threshing unit.

In a box-shaped cutter frame 2 having upper and lower surfaces opened, a pair of rotating bodies 3a, 3 are opposed to both side walls 20, 20 so as to be rotatable inward through bearings 21, respectively. It is configured to support two parallel horizontal axes and to cut the stem culm that is inserted from above into a predetermined cutting length along the culm direction and discharge it from below toward the ground. ing.

In this illustrated example, as shown in FIGS. 1 and 2, the rotating body 3a installed on the upper side in the stem stem discharging direction is a rotation receiving member also serving as a scraping wheel, and the rotating body 3 on the lower side is a cutter. The gear 4 fixed to the shaft end of the cutter shaft 4 of the opposing rotating body 3a is driven by being input from the threshing unit side to a pulley 31 fixed to one shaft end of the cutter shaft 30 of the rotating body 3 and driven.
0 is decelerated and driven via a counter pinion gear 41 and the like.

As shown in FIG. 2, the rotating body 3a comprises a pair of a receiving member 42 and a receiving plate 43 which also serve to scrape a disc-shaped stem, with a predetermined "receptor gap". In a state in which a plurality of the collars 45 for maintaining the spacing formed at the cutting length are alternately fitted on the cutter shaft 4, a mounting screw 46 is screwed into a screw portion at an end portion of the cutter shaft 4 to integrally form the cutter shaft 4. And assembled.

The rotating body 3a has a bearing 21 on the left side (ear side of the grain stem) provided on a cover 22 which removably covers a cutter take-out hole 21a opened in a side wall 20 of the cutter machine casing 2. When the cover 22 is removed, the entire rotating body 3a can be pulled out of the machine through the cutter extraction hole 21a on the left side, and maintenance work such as replacement of parts and cleaning of this part can be easily performed. I have.

The rotating body 3 includes a support shaft 30 having both ends of the cutter shaft 30 supported on both sides of the cutter frame 2 via bearings 21.
a, 30b, a disk-shaped cutter (rotary blade) 32, and a cutter mounting shaft 35 in which a collar 33 having the same length as the collar 45 on the rotating body 3a is inserted. Have.

The cutter mounting shaft 35 is configured such that the shaft portions on the stock side and the spike side are detachable by a joint structure including shaft joints 5 and 5a. The positioning of the gap is easily adjusted.

That is, the cutter shaft 30 is provided with a plurality of cutters 3.
2 and the collar 33 are inserted at a predetermined interval, and a disc spring seat 36a, a collar 36b, and a rotation are provided between a disc-shaped stopper 35 fixed to the left and a press stopper 36 inserted to the right. A nut 37 is screwed into the threaded portion via the stop 36c and fastened. Also, this nut 37
Has a structure in which the threaded portion on which is screwed is fixed and positioned on the shaft end side to reinforce the threaded portion.

As shown in FIGS. 4 and 5, the shaft joints 5 and 5a are slidably fitted and fixed to a connection shaft portion 35a extending outward from a nut 37 screwed to the cutter shaft 30. Movable joint 50, key 51 and mounting screw 5 on support shaft 30a
A semi-cylindrical surface (the lower surface in FIG. 4) of the connecting shaft portion 35a is formed by a bearing portion 53 and a bearing piece 55 which are composed of a fixed joint 52 fixed at 1a and project from each other from the boss portions 50a. 5 and a half-cylinder surface (upper surface) opposite to this surface, the two are fastened with mounting screws 56 as shown in FIG. , So that it can be stably held and fixed.

The movable joint 50 fixed to the cutter shaft 30 is, as shown in FIG.
The support cylinder 57 is also slidably fitted to the outer periphery of the presser stopper 36, and thereby serves as a cylinder for preventing the stem stem from being wound.
Are integrally formed. A gap D for adjusting the positioning of the rotating body 3 (a gap for adjusting the receiver gap) is provided between the end of the support cylinder 57 and the side surface of the adjacent cutter 32.

When the boss 50a of the movable joint 50 is slidably fitted to the connecting shaft 35a at the end of the cutter shaft 30, the key 57a and the fixing screw 57a are fixed.
, And can be freely positioned and fixed in the axial direction. A gap d equal to or larger than the gap D is provided between the connecting shaft 35a and the support shaft 30a, so that the cutter shaft 30 can slide in the axial direction.

On the other hand, the support shaft 30b for supporting the spike side of the cutter mounting shaft 35 shown in FIG. 3 has the same joint structure as the stock side shown in FIG. A gap e similar to the gap d is provided between the shaft 35 and the support shaft 30b.

The stem and culm cutting device 1 configured as described above,
A stem culm supplied in a lateral posture from above in FIG. 1 is cut into a predetermined length in the culm body direction between a plurality of rotating bodies 3 and 3a by a plurality of pairs of cutters 32 and receiving members 42.

At this time, a larger load is applied to the stock side (FIG. 4) of the cutter mounting shaft 35 via the cutter 32 than to the spike side (FIG. 3), but the connecting shaft portion 35a of the cutter mounting shaft 35 at this position. Is a semi-circular shape sandwiched from both sides by a two-part bearing part 53 and a bearing piece 55 (FIG. 5) formed in a movable joint 50 and a fixed joint 52 of the shaft joint 5. The support shaft 30b can be connected and supported with high rigidity. Therefore, it is possible to stably cut the stem and stem while preventing axial deflection and the like due to the cutting load of the stem and stem.

As shown in FIG. 4, a screw portion for screwing a nut 37 for disassembling and assembling the cutter is machined at the intermediate portion of the cutter mounting shaft 35 at the base of the stock. The screw portion is covered with a cylinder 57, and
Since the distal end of the screw is fitted to the outer peripheral surface of the holding stopper 36, the screw portion is placed in one chamber, and the rigidity of this portion is increased as a whole, so that it can be stably supported.

When the mounting screw 56 (FIG. 5) connecting the fixed joint 52 and the movable joint 50 is removed, the side wall 2 is removed.
Cutter support shaft 35 from the support shaft 30a supported by
Can be removed, and the cutter 32 can be easily attached and detached from the stock side after removing the movable joint 50 and the like. Further, with this joint configuration, it is possible to easily perform replacement and maintenance of only the cutter 32 on the stock side, which has a higher frequency of abrasion than the spike, while leaving the cutter 32 on the spike illustrated in FIG.

When it is desired to remove the rotating body 3, the cutter mounting shaft 35 is loosened by loosening the mounting screws 56, 56a (FIGS. 5 and 3).
Since it is supported by the semi-cylindrical surface of the bearing piece 55 supported through the shaft and is prevented from falling down, the rotating body 3 can be freely removed from the machine in an easy posture and efficiently. it can.

When assembling the rotating body 3, while inserting the cutter 32 between the receiving member 42 and the receiving plate 43, both ends of the cutter mounting shaft 35 are mounted on the side wall 20 of the cutter machine frame 2. The cutter mounting shaft 35 is laterally moved to the left and right using the gaps d and e shown in FIGS. After the cutter 32 is positioned so as to have an appropriate receiving gap (cutting gap) between the receiving member 42 and the receiving plate 43, the rotating body 3 is accurately positioned by tightening the mounting screw 56. It can be positioned and fixed.

At this time, as shown in FIG.
If the liner 9 is interposed between the movable joint 50 and the end of the support cylinder 57 of the movable joint 50 so as to be adjustable in thickness, the cutter 32 can be pressed and supported via the movable joint 50 and the fixing screw 57b. Since the joining structure in which the nut 37 is surrounded by the support cylinder 57 is in a state where the cutter mounting shaft 35 is reinforced, there is an advantage that the load on the cutter mounting shaft 35 can be further reduced.

The movable joint 50 is not limited to the one shown in the figure, and the design can be changed so that the cutter mounting shaft 35 is formed by fitting joint means that can move laterally with respect to the support shaft 30a. .

[0032]

As is apparent from the above description, the shaft supporting structure of the stem / culm cutting device according to the present invention, when adjusting the gap between the cutter 32 and the receiving member 42 according to the first aspect of the present invention,
By laterally moving the cutter mounting shaft 35 while being supported by the support shafts 30a and 30b supported on both side walls, the clearance adjustment with respect to the receiving member can be performed efficiently.

According to the second aspect of the present invention, the support shaft 30
The cutter mounting shaft 35 can be slid at the shaft joints 5, 5a connecting the cutter mounting shaft 35 having the cutters a and 30b, so that the cutter 32 and the receiving member opposed to the cutter 32 can be slid. 42 can be easily adjusted.

Further, according to the third aspect of the present invention, the shaft joint 5,
5a, the joints at both ends of the support shaft 30a and the cutter shaft 30 are half-split and are supported one by one, so that the support shaft 30a temporarily supports the end of the cutter shaft 30 to replace the cutter. Work can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a side view of a stem / culm cutting device.

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a cross-sectional view showing a left shaft supporting structure of a cutter mounting shaft.

FIG. 4 is a cross-sectional view showing a right shaft support structure of a cutter mounting shaft.

FIG. 5 is an exploded perspective view of the shaft support structure of FIG.

FIG. 6 is a sectional view showing another embodiment of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stem stem cutting device 2 Cutter machine frame 3, 3a Rotating body 4 Cutter shaft 5, 5a Shaft joint 30 Cutter shaft 30a, 30b Support shaft 32 Cutter (rotary blade) 35 Cutter mounting shaft 35a Connecting shaft part 42 Receiving member 43 Receiving member 43 Receiving plate 43 Reference Signs List 50 movable joint 52 fixed joint 53 bearing part 55 bearing piece 56 mounting screw 57 support cylinder

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B097 AA03 CA06 CC01 CL23 DA10 DA12 DA17 DA32 DA45 DA59 3C027 TT08 VV05

Claims (3)

[Claims] 1. A stem and stalk cutting device comprising a cutter shaft 30 rotating in a cutting direction and a plurality of rotary blades 32 for cutting a stem and stalk to a predetermined cutting length. The support shafts 30a, 30b rotatably supported by the above are divided into a cutter mounting shaft 35 provided with a cutter, and the cutter mounting shaft 35 is fixed to the support shafts 30a, 30b so as to be adjustable in the axial direction. A shaft support structure of a stem / culm cutting device configured to be able to adjust a gap between the rotary blade 32 and a receiving member 42 opposed to the rotary blade 32. 2. The cutter shaft 30 is divided into support shafts 30a and 30b rotatably supporting both sides of the cutter machine frame 2 and a cutter mounting shaft 35 having a cutter, and the cutter shaft 31 and the support shaft 30a, 30b are connected via shaft joints 5 and 5a, and the cutter mounting shaft 35 is slid at the portions of the shaft joints 5 and 5a to rotate the rotary blade 32 and a receiving member opposed to the rotary blade 32. The shaft supporting structure of the stem / culm cutting device according to claim 1, wherein a gap between the stem and the stem is adjustable. 3. The shaft joints 5, 5a are formed in such a manner that the joints at both ends of the support shaft 30a and the cutter shaft 30 are supported in a half-split shape, one surface at a time. The shaft support structure of the stem / culm cutting device according to claim 2, wherein the shaft support structure can temporarily support the stem.