JPH10136744A - Cutting blade driving mechanism for combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of vibration and noise with respect to a cutting blade device constituted of a fixed blade body fixed to a cutting part frame and a sliding blade body in slidable contact with the fixed blade body. SOLUTION: Relating to the cutting blade device constituted of the fixed blade body fixed to the cutting part frame and the sliding blade body in slidable contact with the fixed blade body, a locker shaft is erected on the cutting part frame, the middle part of a locker arm is pivotally attached to the locker shaft and the locker arm is made freely turnable with the locker shaft as a center. The tip part of one arm of the locker arm is inserted to an engaging recessed part formed at the rear end edge of the sliding blade body and an oblong hole 53 extended in the longitudinal direction of the arm is formed at the middle part of the other arm 48b. The pin part 54b of a cutting blade driving crank for pivotally supporting a journal part 54j to the cutting part frame is freely slidably inserted to the oblong hole 53 and the sliding blade body is driven through the locker arm by the rotation of the cutting blade driving crank 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine blade driving mechanism.

[0002]

2. Description of the Related Art Conventionally, there is a clipper-type cutting blade device comprising a fixed blade fixed to a machine frame of a cutting section and a sliding blade slidingly contacting the fixed blade.

[0003]

However, in the above-mentioned cutting blade device, there is a problem that vibration and noise are generated when the sliding blade is driven.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a cutting blade device comprising a fixed blade fixed to a cutting frame and a sliding blade slidingly contacting the fixed blade. A rocker shaft is erected on the rocker shaft, and a middle portion of the rocker arm is pivotally mounted on the rocker shaft, and the rocker arm is rotatable about the rocker shaft. It is inserted into the engaging recess formed in the rear end edge of the moving blade body, and a long hole extending in the longitudinal direction of the other arm is formed in the middle of the other arm, and the journal is formed in the same hole in the cutting frame. A cutting blade drive crank, which supports the shaft, slidably inserts a pin portion of the cutting blade drive crank, and drives the sliding blade body via a rocker arm by rotation of the cutting blade drive crank. To provide a drive mechanism

[0005] The present invention also has the following features.

A ball bearing is externally fitted to the pin portion of the cutting blade drive crank, and the outer peripheral surface of the ball bearing is slid on the inner peripheral surface of the elongated hole.

[0007] A buffer is interposed between the outer peripheral surface of the ball bearing and the inner peripheral surface of the elongated hole.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, when the rotation of the above-mentioned pin portion about the journal portion is converted into the rocking of the rocker arm through the elongated hole, the sliding blade body is turned back and forth. In the vicinity of the point, the movement of the pin portion coincides with the longitudinal direction of the long hole, so that the movement speed of the sliding blade near the turning point is reduced, and vibration and noise can be suppressed.

In addition, since a ball bearing is interposed between the pin and the long hole, the pin and the long hole can be prevented from being worn or rattling, and smooth operation can be maintained for a long period of time. Can be.

Further, since the buffer is interposed between the ball bearing and the elongated hole, the effect of suppressing the vibration and noise can be enhanced.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a combine A with three cutting blades equipped with a cutting blade drive mechanism according to the present invention. In the drawing, reference numeral 1 denotes a track frame equipped with a pair of right and left crawler type traveling devices 2; A machine base installed on the track frame 1, 4 a threshing unit that stretches the feed chain 5 to the left and has a built-in handling cylinder 6 and a processing cylinder 7, 8 a cutting unit equipped with a cutting blade grain culm transport mechanism and the like, 9 is a straw processing unit provided with a straw chain 10 and a straw cutter 11, 12 is an operating unit provided with a driver's seat 13 and a driving operation unit 14, 15 is a motor unit having a built-in engine 16, 17
Is a grain tank, 18 is a fryer cylinder, and 19 is a rocking and sorting unit provided with a blower 20. Threshing in the threshing unit 4, and discharging of the straw into the straw chain 10 and the straw cutter in the straw processing unit 9.
Then, the thresh is separated into grains and fine dust by an oscillating sorter 19, and the grains are stored in a grain tank 17 through a fryer cylinder 18, and Dust is discharged outside through the blower 20.

As shown in FIGS. 2 and 3,
At the rear end of the lower frame 30, which is formed in a substantially rectangular frame shape, left and right drive shaft cases 31L, 31R, which also serve as left and right vertical frames, are erected from front to back and low to form a mowing section frame 32.

At the front end of the lower frame 30, four lower support rods 33 are protruded forward with a predetermined interval, and weeds 34 are attached to the tips of the lower support rods 33, respectively. The planted grain culm introduction path 35 is formed.

On the upper surface of each lower supporting rod 33 behind the weeding body 34, a raising part supporting rod 36 is erected, and an upper end of each raising part supporting rod 36 and an upper end of the left and right drive shaft cases 31L, 31R. A raised portion 39 provided with a raised belt 38 having a plurality of raised tines 37 projecting therefrom is erected at an angle from the front to the lower and rear, and raised by the rotation of the raised belt 38. The culm that fell on the tine 37 is raised and raised.

A cutting blade device 40 is arranged on the lower surface of the rear end of the lower support rod 33 so as to cut the root of the planted grain culm that has moved backward through the planted grain culm introduction path 35. ing.

The cutting blade device 40 includes, as shown in FIGS.
A substantially sawtooth-shaped fixed blade body 43 is fixed to a substrate 42 fixed to the lower surface of the mowing portion frame 32 via bolts 41, and the fixed blade body 43
A substantially saw-tooth-shaped sliding blade body 44 is slidably mounted on the upper surface of the fixed blade body 43, and the lower surface of the sliding blade body 44 is pressed against the upper surface of the fixed blade body 43 by a pressing tool 45.

A cutting blade drive mechanism 46 is connected to the sliding blade body 44 in an interlocking manner. The cutting blade drive mechanism 46 has a rocker shaft 47 erected on the cutting section frame 32 and is connected to the rocker shaft 47. A boss formed in the middle of the rocker arm 48 that is bent into a substantially rectangular shape
48d is rotatably pivoted, and a ball bearing 50, which is pivotally supported at the tip of an arm 48a in front of the rocker arm 48,
The sliding blade body 44 is inserted into a rearward opening engaging recess 52 formed on the rear surface of the passive body 51 protruding from the rear end right side of the sliding blade body 44, and into the middle of an arm 48 b behind the rocker arm 48, Arm
A long hole 53 extending in the longitudinal direction of the long hole 48b is formed, an annular buffer 53a having a predetermined thickness is fitted into the inner periphery of the long hole 53, and an inner portion having a substantially U-shaped cross section is inserted into the inner periphery of the buffer 53a. Race 53
b is fitted to protect the inner peripheral surface and side surface of the buffer 53a, and to improve the sliding of a ball bearing 54b described later.

On the other hand, the journal portion 54j of the cutting blade drive crank 54 is pivotally supported on the cutting portion frame 32, and the cutting blade drive crank 54 is provided via a cutting blade drive case 57 having a bevel gear 56 meshed with the drive shaft 55. The ball bearing 54b is fitted around the pin 54p of the cutting blade drive crank 54,
The ball bearing 54b is movably inserted into the inner race 53b of the elongated hole 53 in the longitudinal direction of the elongated hole 53, and the rocker arm 54 is rotated by the rotation of the cutting blade drive crank 54.
Rocker arm 48a and an arm 48a in front of the rocker arm 48.
The sliding blade body 44 is reciprocally slid in the left-right direction through the contact between the ball bearing 50 at the tip and the engaging concave portion 52 of the passive body 51.

The cutting blade drive mechanism 46 of the present invention is constructed as described above, and the movement and the length of the pin 54p of the cutting blade drive crank 54 near the turning point of the reciprocating sliding of the sliding blade body 44. The longitudinal direction of the hole 53 coincides with the longitudinal direction of the hole 53, so that the speed of movement of the sliding blade body 44 is reduced, so that the generation of vibration and noise can be suppressed. bearing
Since the 54b is interposed, wear and play of the pin portion 54p and the long hole 53 can be prevented, smooth operation can be maintained for a long time, and the ball bearing 54b and the long hole 53 Since the buffer 53a is interposed between them,
The effect of suppressing the vibration and noise can be enhanced.

Behind the raising section 39, lower left and right transport chains 60L and 60R for transporting the grain stalks cut by the cutting blade device 40 to the subsequent feed chain 5 are provided.

The lower left transport chain 60L is configured as follows. That is, a left vertical frame 61L is erected on the upper surface on the left side of the lower frame 30, and a left rotating body support rod bent in a substantially L shape between a middle portion of the left vertical frame 61L and the left lower support rod 33. 62L, and the rotating body support rod 62L on the left side
A rotating body 63 is supported in a suspended state in the middle of the
A left front sprocket 64L is formed at the lower part of the outer periphery of 63, and a lower left conveying chain 60L is wound between the left front sprocket 64L, the left driving sprocket 65L, and the tension roller 66, and the left lower conveying chain 60L is rotated clockwise. Thus, the harvested culm is transported diagonally to the upper right.

The lower right transport chain 60R is configured as follows. That is, the pipe frame 67 is disposed obliquely to the upper left and lower left from the lower right front side inside the reaper 8, and the front end of the pipe frame 67 is supported by the upper portion of the lower support rod 33 on the right side.
The left drive shaft case 31R
We support in the middle.

The pipe frame 67 has a front portion 67F in side view.
The upper part and the rear part 67R are bent in a stepped manner with the lower part, and in plan view, the front part is bent outward with the rear part inside, and the right front sprocket 64R is mounted on the outer periphery of the front part 67F of the pipe frame 67. The right rotating body 63 formed is supported in a suspended state, and the right front sprocket 64R, the rear sprocket 68 supported on the rear end of the pipe frame 67, the right driving sprocket 69, and the right Lower transport chain 60
R, and by rotating the lower right transfer chain 60R to the left,
The harvested culm is transported diagonally to the left and back.

A rotating body 63 is also provided behind the central culm introduction path 35. By rotating the central rotating body 63 clockwise, the harvested grain culm is transferred toward the lower right transport chain 60R. Like that.

Therefore, the harvested grain culm of the right-hand line and the center line joins at a position near the front of the middle part of the lower right transport chain 60R,
The cut culm of the left strip is joined at the rear end of the lower right transport chain 60R and delivered to the subsequent feed chain 5.

In the lower right transport chain 60R, according to the present invention, the rear portion 67R of the pipe frame 67 is disposed close to and parallel to the inside of the lower right transport chain 60R.
A lower transport chain guide 72 extending from the rear end of the lower right transport chain 60R to the junction 71 with the central strip on the outer peripheral surface of 67R.
Is fixed by means such as welding, and the outer surface of the lower transport chain guide 72 is slid in contact with the inner surface of the lower right transport chain 60R,
The right-hand line and the central line merge to ensure that the harvested culm whose transport amount has increased is held.

As described above, by directly fixing the lower transport chain guide 72 to a part of the pipe frame 67, a member for supporting the lower transport chain guide 72 is not required, and the number of parts is reduced. The weight can be reduced.

Further, a rear rake belt pulley 73 is formed at the upper part of the outer periphery of each of the rotating bodies 63, and between the rake belt pulley 73 and the front rake belt pulley 74 which is supported diagonally forward.
A raking belt 76 with a number of raking tines 75 protruding on the outer circumference
And a star wheel 77 is formed on the outer periphery of the lower end of each rotating body 63. Therefore, the right scraping belt
The star wheel 77 and the star wheel 77 are supported by the pipe frame 67 via the respective rotating bodies 63.

In the figure, reference numerals 78L and 78R denote left and right tension mechanisms, which include left and right tension arms 79 and 80, a tension spring 81, and an adjusting screw 82, respectively.
In particular, the left tension mechanism 78L is provided between the left driving sprocket 65L and the tension roller 66 in the lower left transport chain.
60L is arranged substantially parallel to the left end of the lower right transport chain 60R to form a cereal culm transport path R, and the left vertical frame
An arm support 83 is fixed to the outer peripheral surface of the 61L, and the base end of a left tension arm 79 is pivotally connected to a pivot 84 provided on the arm support 83 so as to be freely rotatable. Is set to a position close to the perpendicular 86 drawn down to the virtual extension line 85 at the left end of the lower right transfer chain 60R, and the left tension arm
The rotation locus of the tension roller 66 pivotally supported at the tip of 79 is
When the lower left transfer chain 60L is normally mounted, the lower left transfer chain 60L is substantially parallel to the virtual extension line 85. Therefore, even if the tension roller 66 moves for the tension operation,
The lower left transfer chain 60L between the left driving sprocket 65L and the tension roller 66 and the lower right transfer chain 60R opposed to this portion will be maintained in a substantially parallel state.
The distance between the left and right lower transport chains 60L, 60R is kept substantially constant, and the harvested grain culm can be reliably clamped.

The left tension mechanism 78L is provided with a restricting body 88 having a locking portion 87 formed by bending the distal end portion into a substantially L-shape, and the locking portion 87 and the left tension arm 79 are provided.
By contacting the tension roller 66, the operation of the tension roller 66 on the loose side is restricted, and when the tension spring 81 or the adjusting screw 82 becomes abnormal, the lower left transport chain 60L is prevented from being excessively loose.

In the figure, reference numeral 89 denotes a lower left transport chain guide;
Is a left tensioner, 91 is a center-raising drive shaft case, 92 is an ear tine, 93 is a chain case, 94 is an upper conveying device, and 95 is a winding prevention cylinder.

[0033]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, in the cutting blade device comprising a fixed blade fixed to the cutting section frame and a sliding blade slidingly contacting the fixed blade, the rocker shaft is attached to the cutting section frame. The rocker arm is erected on the rocker shaft, and the rocker arm is rotatable about the rocker shaft.The tip of one arm of the rocker arm is It is inserted into the engaging recess formed in the rear end edge, and a long hole extending in the longitudinal direction of the other arm is formed in the middle of the other arm. The cutting blade drive crank pin is slidably inserted, and the rotation of the cutting blade drive crank drives the sliding blade through the rocker arm, thereby causing the vicinity of the turning point of the reciprocating operation of the sliding blade. Movement speed of sliding blade Te, it is possible to suppress the vibration and noise.

According to the second aspect of the present invention, the ball bearing is externally fitted to the pin portion of the cutting blade drive crank, and the outer peripheral surface of the ball bearing is brought into sliding contact with the inner peripheral surface of the elongated hole. The smooth operation can be maintained for a long period of time by preventing wear and play of the pin portion and the long hole.

According to the third aspect of the present invention, the effect of suppressing the vibration and noise can be further enhanced by interposing a buffer between the outer peripheral surface of the ball bearing and the inner peripheral surface of the elongated hole. it can.

[Brief description of the drawings]

FIG. 1 is a side view of a combine provided with a cutting blade drive mechanism according to the present invention.

FIG. 2 is a partially cutaway side view of a cutting unit.

FIG. 3 is a partially cutaway plan view of a cutting unit.

FIG. 4 is a plan view of a cutting blade drive mechanism.

FIG. 5 is a sectional view taken along line II of FIG. 4;

[Explanation of symbols]

 32 Cutting unit frame 40 Cutting blade unit 43 Fixed blade unit 44 Sliding blade unit 47 Rocker shaft 48 Rocker arm 48a One arm 48b The other arm 50 Tip 52 Engagement recess 53 Long hole 53a Buffer 54 Cutting blade drive crank 54b Ball bearing 54j Journal part 54p Pin part

Claims (3)

[Claims] 1. A fixed blade fixed to a mowing section frame (32).
(43) and a cutting blade device (40) composed of a sliding blade body (44) slidably contacting the fixed blade body (43), a rocker shaft (47) is erected on the cutting part frame (32). The rocker arm (48) is pivotally mounted on the rocker shaft (47), and the rocker arm (48) is rotatable about the rocker shaft (47). One arm (48
a) is inserted into the engaging recess (52) formed at the rear end of the sliding blade body (44), and the arm (48b) is inserted into the middle of the other arm (48b). A long hole (53) extending in the longitudinal direction of the cutting blade drive crank (54) is formed in the long hole (53), and a journal portion (54j) is supported on the cutting portion frame (32). (Five
4p) is slidably inserted, and the cutting blade drive (44) is driven via the rocker arm (48) by the rotation of the cutting blade drive crank (54). mechanism. 2. A pin portion (54) of the cutting blade drive crank (54).
The combine according to claim 1, wherein a ball bearing (54b) is externally fitted to the p), and an outer peripheral surface of the ball bearing (54b) is brought into sliding contact with an inner peripheral surface of the elongated hole (53). Cutting blade drive mechanism. 3. A combine as claimed in claim 2, wherein a buffer (53a) is interposed between the outer peripheral surface of said ball bearing (54b) and the inner peripheral surface of said elongated hole (53). Cutting blade drive mechanism.