JP2000092945A - Driving structure of reaping blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the movement of a cutting blade, a cutting blade crank and a reaping arm, becoming the source of vibration, causing a large vibration and a noise, and not being suitable to high-speed work, because the structure for transmitting the movement of the cutting blade in a combined harvester to a reaping three-axle, a reaping crank, a rod, a reaping arm and a knife head is adopted. SOLUTION: Driving force of a cutting blade 74 is composed so as to be transmitted by a belt 78, and the belt 78 is wound around a following driven pulley 72a and a driving pulley 70a. A crankshaft 72c is integrally formed with a shaft 72 of the hollowing driven pulley 72a. A shaft 70 of the driving pulley 70a is formed so as to cross a reaping three-axle 30a at the right angle, and arranged in one outside of the machine body from the crossing shaft 82 for raising drive. The belt 78 is arranged at the neighborhood of the lower surface of a star wheel 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for driving a cutting blade of a cutting unit which is disposed at the front of a combine, raises a grain stalk, cuts, and transports it to a threshing unit.

[0002]

2. Description of the Related Art Conventionally, harvesting work by combine has been
A mowing part is arranged at the front of the machine body, the cereal culm is raised by the tine of a raising case disposed at the front part of the mowing part, and the culm is raised by the mowing blade disposed at the lower part behind the case. Is cut off, and the cut culm is transported rearward and upward by a transporting unit arranged at the rear of the cutting unit, and delivered to the feed chain of the threshing unit.

[0003] The cutting blades arranged in the left-right direction of the machine reciprocate in the left-right direction. Receiving blades are also provided in the lower part of the cutting blades in the left-right direction of the machine. Is used to cut off the roots of rice, wheat, etc. The driving force of the cutting blade is transmitted to a cutting crank, a rod, a cutting arm, and a knife head in order from a cutting transmission shaft disposed in the cutting frame in the left-right direction. The cutting blade fixed to the lower part of the knife head is reciprocated by the movement.

[0004]

However, in the above-mentioned prior art, the crank motion of the cutting blade, the cutting blade crank, the cutting arm, etc. is the source of vibration, so that the vibration becomes large during high-speed work, which is not suitable. In order to realize high-speed work, a W-action cutting blade that reciprocates the cutting blade right and left simultaneously in the opposite direction, and an opposing cutting blade system were used to drive the vibration to cancel the vibration, but the structure became complicated. Therefore, there is a problem that the cost is increased because the drive units are disposed on both the left and right sides.

[0005]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. In other words, in a combine in which a cutting blade reciprocatingly driven in the left and right direction of the machine is arranged at a lower portion of the cutting unit,
A driven pulley is arranged above the cutting blade, and the cutting blade can be driven to reciprocate from the driven pulley via a crank mechanism. A belt is wound between the driven pulley and a driving pulley provided on the cutting frame. By turning, the cutting blade is driven by a belt transmission mechanism.

[0006] A crank shaft is integrally formed with a driven pulley shaft for fixing the driven pulley.

A drive pulley shaft on which the drive pulley is fixed is disposed orthogonal to three cutting shafts provided in the horizontal pipe of the cutting frame, and power is transmitted from the three cutting shafts to the drive pulley shaft via gears. I did it.

[0008] The drive pulley shaft is arranged outside the fuselage with respect to the drive orthogonal shaft.

[0009] The driven pulley is disposed below the outside of the scraping device.

[0010]

Next, an embodiment of the present invention will be described.
1 is an overall side view of a combine equipped with a mowing device of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view of a mowing portion, FIG. 4 is a plan view of a mowing portion, and FIG. 6 is a plan view of the same, FIG. 7 is an enlarged plan view of the same, and FIG. 8 is a skeleton diagram showing a drive transmission system of the mowing unit of the present invention.

The overall structure of the combine will be described with reference to FIGS. Airframe 2 on crawler-type traveling device 1
And an operating unit 3 is disposed on the front right side of the body frame 2 in the traveling direction, and the operating unit 3 has a front column 4
A steering lever, an accelerator lever and the like are arranged on the front column 4, a side column 5 is erected on the side of the front column 4 at the center of the fuselage, and a work clutch lever is mounted on the side column 5. And a gearshift lever.

A mowing portion 6 projects forward from the left side of the body frame 2 in the traveling direction, raises the grain stalk, cuts the root by a cutting blade 74, and conveys it rearward by a conveying device. A threshing unit 7 is arranged behind the reaping unit 6,
While the stem of the grain stalks conveyed by the conveying device is pinched by the feed chain 8 and conveyed rearward, the grain is shed by the handling cylinder 9. The straw after threshing is conveyed backward by a straw chain 17 and processed by a straw processing device 11 such as a cutter or a binding device.

At the lower part of the threshing unit 7, a sorting device is disposed, and the second product sorted by the sorting device is returned to the handling cylinder 9 or the processing cylinder again, dust and the like are discharged, and fine particles are reduced. It is conveyed to a Glen tank 13 arranged at the rear of the operation unit 3 via a numbering conveyor and a fry conveyor 12. A lower conveyor is disposed at a lower portion in the Glen tank 13, and the lower conveyor is communicated with a discharge auger 14. By driving the lower conveyor and the discharge auger 14, the grains in the Glen tank 13 can be discharged. I have to.

An engine 16 is disposed below the seat 15 in the driving section 3, and the driving force of the engine 16 is transmitted to the crawler-type traveling device 1 to travel, and the cutting section 6, threshing section 7, sorting section And the like, and successively harvesting, threshing and sorting operations, and storing the grains in the Glen tank 13.

Next, the configuration of the mowing unit 6 will be described with reference to FIGS. 3, 4, and 8. FIG. Rotating fulcrum tables 20 and 21 are provided on the front portion of the body frame 2, and a vertically rotating fulcrum shaft 22 composed of a pipe is pivotally supported on the rotating fulcrum tables 20 and 21. A gear case 23 protrudes from one end of the shaft 22, and a cutting input shaft (transmission 1)
A shaft 19 is pivotally supported, and one end of the cutting input shaft 19 projects to the right in the traveling direction to fix the input pulley 24 so as to introduce the driving force from the engine 16 to the cutting unit 6. I have.

A vertical connecting pipe 25 projects forward and downward from the vertical rotation fulcrum shaft 22, and a transmission two shaft 25a is arranged in the vertical connecting pipe 25. A hydraulic cylinder 26 for raising and lowering is interposed between the two so that the mowing part 6 can be turned up and down around the turning fulcrum shaft 22. At the front end of the vertical connecting pipe 25, a horizontal pipe 30 is supported in the lateral direction of the fuselage.
0, a cutting triaxial shaft 30a is laid horizontally, bevel gear cases 80, 81 are fixedly mounted on both sides of the horizontal pipe 30, and support plates 31, 31 are extended forward from the bevel gear cases 80, 81. The horizontal connecting frame 32 is fixed between the front portions of the plates 31 to support the cutting blade 74. In addition, the drive orthogonal shaft 82 is extended upward from the right bevel gear case 81 and extended to the front of the fuselage.
・ Power is transmitted to 35.

The cutting frames 33, 33,... Protrude forward from the horizontal connecting frame 32, and the weeding plates 34, 34 are respectively provided at the front ends of the cutting frames 33, 33,.
... are fixed. At the rear of the weeding plates 34, 34,..., There are raised cases 35, 35, 35, respectively, and the raised cases 35, 35, 35 are provided with tines 36, 36, respectively. In this embodiment, a chain is accommodated, and as shown in FIG. 4, the left side of the fuselage (FIG.
From the left), a two-row cut portion and a single-row cut portion are formed.

Next, the transport unit 10 located at the rear of the reaper 6
Will be described with reference to FIGS. 3 and 4. FIG. The cutting blade 7 is provided on the lower side between the rear portions of the cutting frames 33, 33,...
4 are arranged horizontally, and the cutting frames 33, 33,...
40 and the scraping belts 41, 41, 41 are arranged, and stock feeders 42L, 42R are further arranged on the upper rear side.
Above it, a left upper transfer device 43L and a left front spike transfer device 44L are arranged. In the rear part, the vertical transport device 45 and the upper rear transport device 46
However, as shown in FIG. 4, the upper rear transfer device 46 extends long toward the side with a small number of strips, that is, toward the right front.

When the harvested rice, wheat or the like has a short culm length (hereinafter referred to as "short culm"), the upper rear conveying device 46 and the vertical conveying device 45 are rotated downward, and are moved to the deepest position in the downward rotation. In this configuration, the front end of the tine trajectory of the upper rear transfer device 46 and the line connecting the star wheel 40 and the rear end of the scraping belt 41 overlap each other in a side view. Also, when the harvested rice, wheat, etc. has a long culm length (hereinafter referred to as a long culm), it is rotated upward,
At the shallowest position in the upward rotation, the front end of the tine trajectory of the upper rear transfer device 46 and the raising case 35 are configured to wrap in a side view.

Next, the drive transmission structure of the cutting blade 74 of the present invention will be described with reference to FIGS. As shown in FIG. 5, a bevel gear case 81 provided at the right end of the horizontal pipe 30
The drive pulley shaft 70 orthogonal to the three-cutting shaft 30a extends and is supported further upward from the right outer side than the right-raising drive orthogonal shaft 82 on the right side, and is provided at the lower end of the drive pulley shaft 70. The bevel gear 70b has three cutting axes 3
Power is transmitted via a bevel gear fixed to the right end of Oa. A drive pulley 70a is fixed to the upper end of the drive pulley shaft 70, and an endless belt 78 is wound around the drive pulley 70a. In this embodiment, a V-belt is used as an endless body.

The belt 78 is wound so as to incline slightly downward toward the front, and its front end is wound around a driven pulley 72a. The driven pulley 72a is substantially parallel to the drive pulley shaft 70. The driven pulley shaft 72 provided
It is fixed on top. Further, a tension pulley 71a is provided near an intermediate position between the driven pulley 72a and the driving pulley 70a so as to apply an appropriate tension to the belt 78 wound around the driving pulley 70a and the driven pulley 72a. Make up. Then, the driving pulley 70a,
Tension pulley 71a, driven pulley 72a, belt 7
A belt cover 77 is disposed so as to cover the belt 8 from above, so that dust, dirt and the like do not adhere to the driving portion such as the belt 78.

A crank mechanism is provided below the driven pulley 72a, and a crank plate 72b is fixed to a lower end of the driven pulley shaft 72. The crank plate 72b has a substantially rectangular shape and extends in a direction orthogonal to the driven pulley shaft 72, and has a crank shaft 72c protruding downward from an end thereof. The crankshaft 72c is substantially parallel to the driven pulley shaft 72 and protrudes downward, and the lower end thereof has a substantially rectangular crank groove 7 provided in the knife head 73.
3a is projected from above. The knife head 73 is shown in FIG.
As shown in the figure, it has a substantially trapezoidal shape, a crank groove 73c is provided from the rear part toward the center, the front part thereof is bent slightly upward, and a cutting blade 74 described later is attached to the lower part. ing.

The cutting blade 74 is disposed below the knife head 73 in the lateral direction of the machine body. The cutting blade 74 is integrally formed with the knife head 73 by bolts and the like. A receiving blade 75 is disposed below the cutting blade 74 in the left-right direction of the machine body, and the receiving blade 75 and the cutting blade 74 reciprocating in the left-right direction above the receiving blade 75 are used for stocks such as rice and wheat. Disconnect.

In the drive transmission configuration of the cutting blade 74 configured as described above, the driving force of the engine 16 is transmitted to the drive pulley shaft 70 via the transmission one shaft 19, the transmission two shaft 25a, and the cutting three shaft 30a. . The rotational driving force of the driving pulley 70a is transmitted to a driven pulley 72a via a belt 78, and a crank plate 72b and a crank shaft 72c fixed to the lower end of the driven pulley shaft 72 of the driven pulley 72a.
Is driven to rotate about the driven pulley shaft 72. As a result, the crankshaft 72c makes a circular motion around the driven pulley shaft 72. Since the lower end of the crankshaft 72c is inserted into the crank groove 73a of the knife head 73 as described above, the circular motion of the crankshaft 72c is made. Tries to push the inner wall of the crank groove 73a in the rotation direction. However, since the knife head 73 is integrally fixed to the lower cutting blade 74, and the cutting blade 74 is supported so as to be slidable only in the left-right direction of the machine body, the circular motion of the crankshaft 72c is changed in the left-right direction. This is converted into a reciprocating motion, and the cutting blade 74 reciprocates in the left-right direction integrally with the knife head 73.

As described above, since the drive transmission of the cutting blade 74 of the present invention is performed by the driving method using the belt 78, the cutting blade 7 is driven.
4, the variable load is not directly transmitted to the gear,
The noise can be reduced. The driven pulley shaft 72
And the crank plate 72b and the crankshaft 72c are integrally formed, so that load fluctuation due to backlash is reduced, and vibration and noise can be reduced. Thus, the high-speed operation of the cutting blade 74 can be performed without a costly structure such as the W-action cutting blade system or the opposed cutting blade system, and the cost can be reduced.

Since the drive pulley shaft 70 is disposed so as to be orthogonal to the cutting triaxial shaft 30a as described above, the position of the drive pulley 70a at the upper end of the drive pulley shaft 70 is centered on the cutting triaxial shaft 30a. The drive pulley 70a can be set arbitrarily on the circumference of the star wheel 40, for example, by arranging the drive pulley 70a in a position parallel to the star wheel 40 as in the present embodiment. Pulley 7
1a, the driven pulley 72a, the belt driving unit such as the belt 78, etc., can be prevented from interfering with the star wheel 40, the scraping belt 41, etc. by being displaced in the vertical direction, and the respective pulleys 70a, 71a, 72a Since it is located below and outside the scraping device and is located outside the grain stalk transport route, intrusion of mud and straw can be prevented.

As shown in FIG. 5, the belt drive unit of the present invention is disposed near the lower surface of the star wheel 40 so that a work space for maintenance or the like can be secured from below the belt drive unit. By raising the portion, maintenance of the cutting blade 74, the belt 78, each pulley, and the like can be easily performed from below.

As shown in FIGS. 6 and 8, the drive pulley shaft 70 is raised at the position where the drive pulley shaft 70 is disposed.
2, it is configured to be on the outer side of the fuselage. However, it is also possible to adopt a configuration in which the belt drive unit is raised on the left side of the fuselage and is disposed outside the orthogonal axis. Is obtained.

As described above, the reaping and transporting steps in the transporting section 10 are as follows. First, at the front end of the reaping section 6, the weeds 34, 34,. Cereal stems, etc., each raised case 35 35.3
., And are conveyed upward. When the root portion reaches the position of the cutting blade 74, the root is cut off by the reciprocating movement of the cutting blade 74 and the receiving blade 75 disposed at the lower portion, and the cut culm is transferred to the transport unit 10 Reach Then, the grain culm is conveyed backward by the stock origin conveying units 42L and 42R, the upper part is conveyed rearward by the upper conveying device 43L and the upper rear conveying device 46, and the head portion is the front ear conveying portion. It is transported by the device 44L.

In this manner, the stock transfer device 42L · 4
The root side of the cereal stem transported by the 2R is a vertical transport device 45
The upper transfer device 43L and the upper rear transfer device 4
6. The spike side conveyed by the front spike conveying devices 44L and 44R is inherited by the upper rear conveying device 46, and the root side of the grain culm is further inherited by the feed chain 8 and conveyed to the threshing unit 7. ing.

[0031]

As described above, the present invention has the following advantages. That is, in a combine in which a cutting blade that reciprocates in the left-right direction of the machine is arranged below the cutting unit, a driven pulley is disposed above the cutting blade, and the cutting blade can be reciprocated from the driven pulley via a crank mechanism. In addition, the belt is wound between the driven pulley and the driving pulley provided on the cutting frame, and the cutting blade is driven by the belt transmission mechanism. The load is not transmitted directly to the gears, reducing vibration and noise. High-speed work of the cutting blade is possible without using costly structures such as the W-action cutting blade system and the opposed cutting blade system. Thus, cost reduction can be realized.

Since the driven pulley shaft for fixing the driven pulley is integrally formed with the crankshaft, load fluctuation due to backlash can be reduced with a simple configuration, vibration and noise can be reduced, and cost can be reduced.

A drive pulley shaft on which the drive pulley is fixed is arranged orthogonal to three cutting shafts provided in the horizontal pipe of the cutting frame, and power is transmitted from the three cutting shafts to the drive pulley shaft via gears. The driving pulley can be set at any position around the three cutting axes. By arranging the driving pulley in a position parallel to the star wheel, the belt drive arranged substantially on the same plane can be set. It is possible to prevent the parts from interfering with the star wheel.

Since the drive pulley shaft is disposed outside the machine body relative to the raising and driving orthogonal shaft, it is possible to prevent a load fluctuation due to the driving of the cutting blade from affecting the driving system of the raising, and to raise the driving pulley shaft. Problems such as intermittent movements can be eliminated. In addition, it is possible to prevent mud and straw from entering the pulleys of the belt drive unit from being disengaged from the conveyance path of the scraping device.

Since the driven pulley is disposed below the outside of the scraping device, the belt driving unit maintains a substantially parallel arrangement so as to prevent interference with the star wheel. As we can secure work space,
The workability is improved during maintenance of the cutting blade, belt, pulleys, and the like.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine equipped with a mowing device of the present invention.

FIG. 2 is an overall plan view of a combine equipped with the mowing device of the present invention.

FIG. 3 is a side view of the reaper.

FIG. 4 is a plan view of the reaper.

FIG. 5 is a side sectional view of a belt driving unit according to the present invention.

FIG. 6 is a plan view of the belt driving unit of the present invention.

FIG. 7 is an enlarged plan view of a belt driving unit according to the present invention.

FIG. 8 is a skeleton diagram showing a drive transmission system of the mowing unit according to the present invention.

[Explanation of symbols]

 6 Cutting unit 10 Conveying unit 40 Star wheel 70 Drive pulley shaft 70a Drive pulley 71a Tension pulley 72 Follower pulley shaft 72a Follower pulley 72b Crank plate 72c Crank shaft 73 Knife head 73a (Knife head) Crank groove 74 Cutting blade 75 Receiving blade

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B081 AA01 BB11 BB16 CC51 EB02 EE12 2B382 GA03 GA09 GB01 GC03 GC04 GC23 GD02 HA02 HA12 HB02 HC21 HC31 HF02 HH03 HH13 HH15 HH22

Claims (5)

[Claims] 1. A combine pulley having a cutting blade reciprocatingly driven in the left-right direction of the machine at a lower portion of a cutting unit, wherein a driven pulley is disposed above the cutting blade, and the cutting blade is reciprocally driven by the driven pulley via a crank mechanism. A driving device for driving the cutting blade, wherein a belt is wound between the driven pulley and a driving pulley provided on the cutting frame, and the cutting blade is driven by a belt transmission mechanism. mechanism. 2. A driven pulley shaft for fixing said driven pulley, wherein a crankshaft is integrally formed with said driven pulley shaft.
The driving mechanism of the cutting blade as described in the above. 3. A drive pulley shaft on which the drive pulley is fixed is disposed orthogonal to three cutting shafts provided in a horizontal pipe of a cutting frame, and power is transmitted from the three cutting shafts to the drive pulley shaft via gears. The driving mechanism for the cutting blade according to claim 1, wherein the driving force is transmitted. 4. A driving mechanism for a cutting blade according to claim 3, wherein said drive pulley shaft is disposed outside the machine body with respect to the drive orthogonal shaft. 5. The driving mechanism for a cutting blade according to claim 1, wherein the driven pulley is disposed outside and below the scraping device.