JP2000083440A - Cutting blade device of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibrations on a cutting work and enhance the speed of the cutting work. SOLUTION: This cutting device 50 of a combine harvester C cuts grain straws raised using a raising device 9 liftably disposed on a frame 1 with the travel of the frame, and the cut grain straws are threshed in a threshing portion 22. The cutting device 50 has an endless chain 38 disposed in a state capable of being rotated at a high speed and cutting blades 51 attached to the chain 38. The cutting blades 51 are continuously driven together with the chain 38 at a high speed in one direction to cut grain straws. Since the cutting blades 51 are continuously rotated at a high speed in one direction without being reciprocated, vibrations are little. Since grain straw guides 41 disposed at a prescribed pitch in the lateral direction of the frame are projected from the frame in the frame-traveling direction, the lateral escapes of the grain straws on their cutting work can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine cutting blade device, and more particularly to a combine cutting blade device for cutting a grain stalk by rotating a cutting blade attached to a band-shaped member.

[0002]

2. Description of the Related Art As shown in FIG. 8, a conventional combine cutting blade device has a number of cutting blades 51 and receiving blades 52 vertically overlapped and connected by a knife bar 54.
The blade 1 and the receiving blade 52 are mounted so as to be reciprocally slidable in the left-right direction between the cutting blade receiving base 56 and a holding plate 58 provided at an appropriate position in the lateral direction. In addition, the knife heads 60 and 62 projecting from the rear portions of the cutting blade 51 and the receiving blade 52 are engaged with a pair of bell cranks 64 and 66 which are connected to each other. With this, the cutting blade 51 and the receiving blade 52 reciprocate left and right in opposite directions to each other with the reciprocating operation of the piston rod 68 connected to the one bell crank 64 to cut the culm.

[0003]

However, according to the conventional cutting blade device, the cutting blade 51 and the receiving blade 5 are required to maintain sharpness.
And a gap between the cutting blade 51 and the receiving blade 52 is caught in the gap between the cutting blade 51 and the receiving blade 52 during the operation. was there. In addition, the conventional cutting blade 51 and receiving blade 52
Is a structure that reciprocally slides in a clipper type. Therefore, if the reciprocal sliding cycle is to be accelerated, there is a problem that vibration between members is increased, noise is generated, and it is difficult to increase the speed. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a combine cutting blade device which can reduce the vibration at the time of cutting and can speed up the cutting operation. It is in.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is provided as follows.
The grain stalk raised by the raising and lowering device (9) that can be raised and lowered with respect to the body (1) is cut by the cutting blade device (50), and the cut culm is threshed by the threshing unit (22). In the combine (C) to be obtained, the cutting blade device (50) includes an endless band-shaped member (38) arranged so as to be driven at high speed, and a cutting blade (51) attached to the band-shaped member (38). Has,
The cutting blade (51) is rotationally driven at a high speed together with the band-shaped member (38), and the cutting blade (51) cuts a grain stem.

According to a second aspect of the present invention, a large number of cereal stalk guides (41) arranged at predetermined intervals in the width direction of the machine from the base of the machine are combined with the band-shaped member (38) on the side facing the cereal stalk.
And projecting in a direction substantially orthogonal to the circumferential direction.

The invention according to a third aspect is characterized in that the cutting blade (5)
It is characterized in that 1) is subjected to surface treatment such as chromizing, nitriding, and quenching.

[Action] Based on the above-mentioned invention specifying matter, the cutting blade device (50) of the combine (C) is raised by the raising device (9) which can move up and down with respect to the machine body (1) as the machine body advances. The cutting blade device (50)
Is an endless belt-shaped member (3
8) and a cutting blade (5) attached to the belt-shaped member (38).
The cutting blade (51) is continuously and rotationally driven in one direction at a high speed together with the band-shaped member (38) to cut the grain stem in a brush cutter type. The cutting blade (51)
Is continuously rotated in one direction at high speed without reciprocating motion, so that it is possible to reduce the vibration and cut the cereal stem efficiently. A large number of grain stalk guides (41) arranged at a predetermined pitch in the machine body width direction are protruded from the body (1) side in the traveling direction.
1) prevents the lateral escape of the cereal stem during cutting.

Note that the reference numerals in parentheses described above are for the purpose of comparing the drawings, and do not limit the invention-specifying matters of the present invention at all.

[0010]

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

As shown in FIG. 1, the combine C has a pre-processing unit 14 at the front of the traveling body 1 which can be moved up and down with respect to the traveling body 1. The traveling body 1 is composed of a pair of right and left crawler traveling units 8. , 8. A threshing unit 22 for threshing the harvested stalks and sorting the threshed grains is provided at an upper portion of the traveling machine body 1, and a driver's seat 24 is provided in front of the threshing unit 22.

The pre-processing unit 14 has a transmission case 5 having a base end fixed to the transmission shaft case 6 and extending downward toward the front of the traveling machine body 1. It is supported so as to be able to move up and down based on expansion and contraction of a hydraulic cylinder 7 connected to the section.

The pre-processing unit 14 is fixed to the pre-processing frame 3 and divides the uncut moist culm into a divider 2. The raising device 9 raises the culled cereal culm. The cutting blade device 50, the scraping and conveying device 30 for scraping the cut grain culm, the length of the grain culm conveyed to the rear of the machine and taken over and automatically adjusted to an appropriate handling depth, and threshing. A handling depth transport device 34 that transports the feed chain 19 (see FIG. 3) toward the threshing unit 22 is provided.

The right and left raising chains of the raising device 9 are driven by a shaft built in a transmission shaft case 15 via a drive shaft in the transmission shaft tube 4. Similarly, the center raising chain is driven by a shaft built in the transmission shaft case 16 via a drive shaft in the transmission shaft cylinder 4.

FIG. 2 shows a power transmission system.
The transmission of power to the pre-processing unit 14 is transmitted from a transmission case (not shown) to the transmission shaft case 6 by a V-belt, and further transmitted from the transmission case 5 and the transmission shaft cylinder 4 to the star wheel 11, the scraping device 30, the cutting blade device 50, and the like. , Raising device 9
Then, each part is driven by being transmitted to the handling depth transfer device 34 and the like.

[0016] As shown in FIG.
0 is a left-side squeeze transport body 31 located on the left side when viewed from the driver's seat 24,
A central raking carrier 33 located at the center, a cutting blade device 50;
And a confluence portion A where the stalks mowed by the confluence are joined from the respective raked conveyance bodies.

The left rake carrier 31 is composed of a star wheel 11 for rushing and transporting the stock on the left side, a pulley coaxial with the star wheel 11, and a roller rotatably supported by the pre-processing frame 3. It is wound around a conveyor belt 10 arranged above the star wheel 11 and a sprocket arranged on one side coaxially with the star wheel 11, and the other side is rotatably supported on the pre-processing frame 3. And a hook with a claw that is wound around a sprocket that is wound around a sprocket to be wound and a sprocket that is rotated and driven by receiving power from a drive shaft in the transmission shaft tube 4 and scrapes a stem portion of a grain stem. The transport chain 12 includes a stationary transport chain 12 and a locking transport chain 12 ′ which is similarly wound around the sprocket and rakes the spike of the grain stem.

The same applies to the right-side rake carrier 32, and the center rake carrier 33 is composed of the star wheel 11 and the conveyor belt 1.
0 is provided.

The handling depth transfer device 34 is rotatably supported by a support member erected from the body of the machine so that the rear portion can adjust the handling depth, and the stock transfer chain 21 for transferring stocks. The tip transport chain 20 that can move vertically with the rear portion as a fulcrum.
The start end of the stock feed chain 13 is extended above the leading end side of the right stock transfer chain 13 in the transfer direction. One end of the tip transfer chain 20 is wound around a sprocket driven by receiving power from a drive shaft in the transmission shaft case 6, and the sprocket is rotatably supported by the body 1 side. Also,
The stock feed chain 21 on the stock side receives power independently of the drive shaft in the transmission shaft case 6 to transmit rotation.

Here, in the present invention, the cutting blade device 50 has an endless band-shaped member provided so as to be driven at high speed, and a cutting blade attached to the band-shaped member. It is rotated at high speed together with the band-shaped member, and the grain blade is cut by the cutting blade.

As shown in FIG. 4, the cutting blade device 50 has sprockets 37, 37 attached to shafts 36, 36 implanted in pretreatment frames 3, 3, respectively, which are separated from each other left and right. A chain 38 as a belt-like member is wound between the left and right sprockets 37,37. As shown in FIG. 5, an attachment 39 is attached to each link plate of the chain 38, and a cutting blade 51 is fixed to the attachment 39 with a rivet 40. When the one sprocket 37 is driven to rotate at high speed by the power from the transmission shaft cylinder 4, the cutting blade 51 is also driven integrally, so that there is no equivalent to a conventional receiving blade. The stalks can also be cut by a brush cutter.

The cutting blade 51 is provided with a carbide tip on its blade so as to be able to cut a grain stalk at a high speed of, for example, about 10 m / s, or so as to maintain sharpness for a long period of time. The surface of the blade is subjected to surface treatment such as chromizing, nitriding, and quenching.

The chain 38 is guided by a chain guide 42 provided on the side facing the grain stalk, and a large number of grain stalk guides 41 arranged at predetermined intervals in the left-right direction of the machine body. And projecting in a direction substantially orthogonal to the circumferential direction of the horn. The chain guide 42 prevents the chain 38 from swinging or escaping when a load is applied to the chain 38.

That is, as shown in FIG. 6, the chain guide 42 is attached to the pre-processing frame 3 via the bracket 43, and the chain guide 4
2, a support frame 45 is attached via a fixing member 44.
1 is protruded. The grain stalk guide 41 is attached at a position where the grain stalk is cut by the cutting blade 51, and prevents the grain stalk from escaping in the circumferential direction of the chain 38 by the cutting blade 51.

The chain 38, the chain guide 42, and the support frame 45 are covered by a cover 46, and the cereal stalk guide 41 projects from a hole 47 formed in the cover 46 toward the front of the machine. I have.

FIG. 7 is a view showing another embodiment of the cutting blade device 50. In this embodiment, between the timing gears 37 'and 37' which are arranged left and right apart, Timing belt 48 instead of chain 38
And a triangular saw blade 49 is provided at a predetermined pitch in the circumferential direction of the timing belt 48. According to this embodiment, since the timing belt 48 is not made of metal, noise can be reduced as compared with the case of the chain 38.

Next, the operation of the present embodiment will be described.

[0028] Combine C is used for the body 1
The stalks raised by the raising and lowering device 9 that can be raised and lowered are cut by the cutting blade device 50, and the cut stalks are transferred by the scraping transfer device 30, the handling depth transfer device 34, and the threshing feed chain. By 19, it is conveyed toward the threshing unit 22. The cutting blade device 50 is attached to the pre-processing frame 3 below the pre-processing unit 14, and a number of cutting blades 51 are attached to a chain 38 wound between sprockets 37, 37 spaced apart from each other on the right and left sides of the machine. Have been.

When one of the sprockets 37 is driven by receiving the power from the transmission shaft cylinder 4 to rotate the chain 38 at a high speed, the cutting blade 51 is also driven at a high speed in one direction. Then, the culm is cut by the cutting force. In this case, a chain guide 42 is provided along the circumferential direction of the chain 38, and the chain guide 42 prevents the chain 38 from swaying or escaping. The cutting blade 51 rotates at a high speed in one direction and does not have a portion that slides back and forth as in the related art.

From the support frame 45 attached to the pre-processing frame 3, grain stalk guides 41 arranged at a predetermined pitch in the left-right width direction of the machine are projected from the support frame 45 in the machine body advancing direction. By this stalk guide 41
When the cereal stalk is pressed against the stalk, it plays a role in preventing the stalk from escaping sideways.

[0031]

According to the first aspect of the present invention, a cutting blade device has an endless band-shaped member that can be driven at a high speed, and a cutting blade attached to the band-shaped member. By rotating and cutting the grain stem, there is no reciprocating part, so that vibration is reduced and the speed of the cutting operation can be increased.

According to the second aspect of the present invention, a large number of grain stalk guides arranged at predetermined intervals in the machine body width direction are arranged in a direction substantially orthogonal to the circumferential direction of the belt-shaped member facing the grain stalk. By projecting toward the belt member, the grain stalk taken into the front surface of the belt-shaped member is restricted by the grain stalk guide, and can be prevented from escaping to the side at the time of cutting.

According to the third aspect of the present invention, since the surface of the cutting blade is subjected to the surface treatment, the blade can be sharpened so that the grain stalk can be cut at high speed, and the sharpness can be maintained for a long period of time. it can.

[Brief description of the drawings]

FIG. 1 is a side view of a pre-processing unit of a combine to which the present invention is applied.

FIG. 2 is a diagram showing a connection state of the power transmission system according to the first embodiment;

FIG. 3 is a plan view of a cereal culm transport mechanism in the pre-processing unit according to the first embodiment.

FIG. 4 is a plan view of the cutting blade device according to the present invention.

FIG. 5 is a view showing a cutting blade attached to a chain via an attachment.

FIG. 6 is a side view of the cutting blade device of FIG. 4;

FIG. 7 is a plan view of a cutting blade device according to another embodiment.

FIG. 8 is a plan view of a conventional cutting blade device.

[Explanation of symbols]

 C Combine 1 Running machine 3 Pre-processing frame 9 Raising device 14 Pre-processing unit 22 Threshing unit 36 Shaft 37 Sprocket 38 Chain 39 Attachment 40 Rivets 41 Grain culm guide 42 Chain guide 45 Support frame 50 Cutting blade device 51 Cutting blade

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Kurihara 667 Idaicho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 Inside Mitsubishi Agricultural Machinery Co., Ltd. 667 1 Mitsubishi Fuki Co., Ltd. F term (reference) 2B083 BA11 CA11 HA31 HA54 JA09

Claims (3)

[Claims] A combine capable of cutting a grain stalk raised by an elevating device capable of moving up and down with respect to the body with a cutting blade device, and threshing the cut grain stalk in a threshing unit. In the cutting blade device, the cutting blade device includes an endless band-shaped member arranged so as to be drivable at high speed, and a cutting blade attached to the band-shaped member, and the cutting blade is rotationally driven at high speed together with the band-shaped member. And a cutting blade device for cutting the grain stem using the cutting blade. 2. A plurality of grain stalk guides arranged at predetermined intervals in the machine body width direction from the body base side in a direction substantially orthogonal to the circumferential direction of the band-shaped member facing the grain stalk. The combine cutting blade device according to claim 1, wherein the cutting blade device is provided. 3. The combine cutting blade device according to claim 1, wherein the cutting blade is subjected to a surface treatment such as chromizing, nitriding, and quenching.