JP3547189B2 - Combine blade drive - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a cutting blade driving device that drives a cutting blade device in a pre-processing unit of a combine.
[0002]
[Prior art]
As disclosed in Japanese Utility Model Publication No. 5-25388, a conventional cutting blade mechanism in a conventional pre-processing device includes a crank that drives a bell crank connected to each of an upper cutting blade and a lower cutting blade with a crank arm and a driving rod. There is a cutting blade drive that slides the upper cutting blade and the lower cutting blade in the right and left opposite directions to perform cutting, and the crank portion of this cutting blade drive is provided on the cut ground side on the right side of the center of the preprocessing frame. It has been known that a drive rod swings up and down with the drive force transmitted from a second transmission shaft while swinging up and down a crank portion.
[0003]
[Problems to be solved by the invention]
However, if the crank portion is provided on the cut ground side on the right side of the center of the preprocessing frame, the crank portion overlaps with the transport path of the harvested grain culm, which causes disturbance of grain culm transport and transport turbulence. There is a problem that straw chips, mud, etc. of grain stems falling during transportation are wound around the cutting blade drive shaft. Further, there is a problem that the drive rod abuts on the field because the drive rod swings up and down, thereby damaging the field.
[0004]
[Means for Solving the Problems]
The combine blade driving device of the present invention for solving the above-mentioned problems is tilted forward and downward, and is vertically moved via a transmission shaft holder 4 to which a second transmission shaft case 6 in the left-right direction is fixed at the end. A pre-processing unit 3 that is swingably connected to the machine body 1 side; a cutting blade 21 laterally provided below a rear portion of a pre-processing frame 14 of the pre-processing unit 3; And a vertical drive shaft 11 for transmitting the driving force of the crank portion 37 from the machine body 1 inside the power transmission shaft holder 4. The power transmission shaft holder 4 The crank drive unit 43 is provided through the lower position of the grain culm conveying path and takes out the driving force for driving the cutting blade directly from the vertical transmission shaft 11, and the lower position of the transmission shaft holder 4 on the machine body 1 side from the second transmission shaft case 6. And the above Is characterized by formed by providing in front of the merging portion 9 of the ink driving unit 43 kernels 稈搬 feed path.
[0005]
A second feature is that the crank driving unit 43 and the crank unit 37 are connected by a rod 42, and the rod 42 is configured to operate the crank in a plane in the front-rear and left-right directions.
[0006]
[Action]
Since the transmission shaft holder 4 passes through the position below the grain culm transport path and the crank drive unit 43 is provided below the transmission shaft holder 4, the transmission shaft holder 4 is located between the grain culm transport path and the crank drive unit 43. Will exist. For this reason, the transmission shaft holder 4 protects the upper part of the crank driving part 43, and prevents the falling objects such as mud, hakama, straw and the like dropped from the grain stalk being transported from being wound around the crank driving part 43. It acts to drop to the left and right of 43. Further, the rod 42 connecting the crank driving unit 43 and the crank unit 37 is driven in the front, rear, left and right planes by the operation of the crank driving unit 43, so that the rod 42 does not move below the initial set position of the rod 42. .
[0007]
【Example】
1 and 2 show a side view and an overall composite plan view of a pre-processing unit 3 of a combine to which the mechanism of the present invention is applied. A transmission shaft holder 4 is pivotally supported forward from the front of the machine body 1 supported by the crawler 2 so as to be vertically swingable. The tip of the transmission shaft holder 4 is integrally fixed to the pre-processing unit 3. Is fixed to the second transmission shaft case 6. The transmission shaft holder 4 is bent in a V-shape so as to pass through a lower portion of a grain culm conveyance path composed of left and right conveyance units 7 and 8 formed in a V-shape and to avoid the junction 9. For this reason, the longitudinal transmission shaft 11 to be installed is divided into two parts, a first longitudinal transmission shaft 11a and a second longitudinal transmission shaft 11b, and connected by a gear 12 in accordance with the bending of the transmission shaft holder 4.
[0008]
With the above structure, the pre-processing unit 3 can swing up and down with respect to the machine body 1 via the transmission shaft holder 4. A plurality of dividers 13 are attached to a lower end of the front of the pre-processing unit 3 on a divider frame 14a of the pre-processing frame 14, and a mowing device 16 is attached to a lower rear portion of the divider frame 14a. Above the divider frame 14a, a scraping device (star wheel 17 or the like) for performing an operation to be described later and the left and right transport units 7 and 8 are provided. The second power transmission shaft case 6 is attached to the rear of the preprocessing horizontal frame 14b of the preprocessing frame 14 in the upper right and left directions, and the second power transmission shaft 18 is inserted and supported therein.
[0009]
As shown in FIGS. 2 and 3, the mowing device 16 attached to the pre-processing frame 14 is supported by a plate-shaped receiving table 19 attached to the pre-processing frame 14 over substantially the entire width. An upper cutting blade 21a and a lower cutting blade 21b are mounted on the blade base 19 so as to be able to move left and right. Then, the upper cutting blade 21a and the lower cutting blade 21b are slid in the left and right opposite directions by a method described later, so that the culm cut by the divider 13 attached to the front of the cutting device 16 is cut. Then, the grain stalks cut by the cutting blade 21 are raked back at the root by a scraping device (such as a star wheel 17), are transported by the right and left transport units 7, 8, and are transported from the left and right by the transport junction unit 9. The culms that have joined together are lifted and transported further to the upper rear.
[0010]
The driving force of the pre-processing unit 3 is transmitted from a transmission case (not shown) of the machine body 1 via a pulley 22 to a first transmission shaft 24 housed in a first transmission shaft case 23 and is input to a bevel gear. The transmitted power is transmitted to the above-described vertical transmission shaft 11 via the reference numeral 26. Further, the driving force transmitted from the vertical transmission shaft 11 to the above-described second transmission shaft 18 via the bevel gear 27 and performing the above-described scraping and transporting operation is transmitted from the second transmission shaft 18 to the scraping device and the transport unit. And so on. The method of transmitting the driving force for causing the mowing operation will be described later.
[0011]
As shown in FIGS. 3 and 4, the cutting device 16 has plate-shaped knife heads 28a and 28b fixed to the upper cutting blade 21a and the lower cutting blade 21b, and the knife heads 28a and 28b have rear ends. Knife-side receiving portions 31a and 31b are formed, each of which has a U-shaped notch for receiving a knife-side engaging portion of the upper cutting blade 21a driving crank 29a and the lower cutting blade 21b driving crank 29b. On the other hand, the cranks 29a and 29b have a T-shaped cross section and an L-shaped cross section which are supported by a support bracket 33 by shafts 32a and 32b. The support bracket 33 is attached to the pre-processing horizontal frame 14b.
[0012]
The two cranks 29a and 29b are connected by a fulcrum shaft 30 and are configured to rotate in conjunction with each other. The above-described knife head is connected to the cranks 29a and 29b via pins 34a and 34b projecting from the knife-side tip thereof and cylindrical rollers 36a and 36b rotatably fitted to the pins 34a and 34b. It is connected to the rear ends of the blades 28a and 28b, and has a conventionally known configuration in which the upper and lower blades 21a and 21b are slidably driven in opposite directions via the knife heads 28a and 28b.
[0013]
The crank portion 37 having the above structure is provided at a substantially central position of the pre-processing frame 14 in plan view, and the other end of the crank 29a which is elongated in the uncut side (left side in plan view) direction has: The other end of a connecting portion 41 having a cylindrical pin 39 horizontally supported at one end is pivotally supported via a fulcrum shaft 40. The front end of a crank rod 42 is pivotally supported via a pin 39 of the connecting portion so as to be vertically swingable.
[0014]
On the other hand, as shown in FIG. 5, at a position immediately below the transmission shaft holder 4 and at a position in front of the transport junction 9, the transmission shaft holder 4 has an opening portion 4a which is substantially vertically downward, and a crank driving portion 43 is provided below the opening portion 4a. ing. The crank driving part 43 is covered with a case 44 having a U-shaped cross-sectional shape in the upper part and the circumferential direction, and a crank driving shaft 46 is supported in the crank driving part 43 so as to project downward. Is connected to the second vertical transmission shaft 11b via a bevel gear 47. An arm 48 is fixed to the lower end of the crank drive shaft 46. The arm 48 is rotated about the drive shaft 46 by the rotation of the drive shaft 46 that directly obtains a driving force from the second vertical transmission shaft 11b via a bevel gear 47. Rotates in a plane in the front, rear, left and right directions. Further, a fulcrum shaft 49 protrudes downward from the tip of the arm 48, and a connection portion 51 having the same configuration as the connection portion 41 is rotatably supported by the fulcrum shaft 49. The other end of the crank rod 42 is connected to the distal end of 51 in the same manner as the connecting portion 41. Since the crank rod 42 is mounted in the above-described manner, the degree of freedom in assembling can be increased.
[0015]
That is, the crank rod 42 is installed further toward the uncut land side than the crank portion 37 and is located immediately below the transmission shaft holder 4. Then, the rotation of the arm 48 of the crank driving section 43 is converted into an operation in the front-rear direction within the rotation plane of the arm 48 and transmitted to the crank section 37. When the crank 29a swings by the crank rod 42, the crank 29b swings in the left and right opposite directions to the crank 29a due to the fitting connection of the engaging portions of the crank 29a and the crank 29b, and the knife heads 28a and 28b To slide the upper blade 21a and the lower blade 21b in opposite directions.
[0016]
【The invention's effect】
According to the apparatus of the present invention configured as described above, the transmission shaft holder is located below the grain culm transport path, and the crank drive unit is located immediately below the transmission shaft holder, so that the mud dropped from the grain culm being transported. , Hakama, straw, etc., pass over the transmission shaft holder and are dropped to the left and right of the transmission shaft holder. For this reason, there is an advantage that dirt such as mud, hakama, straw, etc. dropped from the grain stalk being conveyed does not wind around the crank driving unit, and the crank driving unit has a structure to take the driving force directly from the vertical transmission shaft. It becomes simple and cost reduction and downsizing are possible.
[0017]
Further, since the crank rod is swung in the plane in the front-rear, left-right direction, the crank rod or the like does not contact the field or the like and damage the field.
[Brief description of the drawings]
FIG. 1 is a combined side view of a pre-processing unit of a combine.
FIG. 2 is a combined plan view of a combine.
FIG. 3 is a plan view of the cutting blade device.
FIG. 4 is an enlarged front sectional view showing a connected state of a crank.
FIG. 5 is an enlarged side view of the cutting blade drive unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 3 Preprocessing part 4 Transmission shaft holder 9 Merging part 11 Vertical transmission shaft 14 Preprocessing frame 21 Cutting blade 37 Crank part 42 Crank rod (rod)
43 Crank drive

Claims (2)

A pretreatment that is tilted downward and forward and is vertically and freely swingably connected to the machine body (1) via a transmission shaft holder (4) having a left and right second transmission shaft case (6) fixed to the end. Part (3), a cutting blade (21) laterally provided below a rear part of a pre-processing frame (14) of the pre-processing part (3), and a cutting blade (21) behind the cutting blade (21). A crank part (37) for left and right sliding drive is provided, and a vertical transmission shaft (11) for transmitting the driving force of the crank part (37) from the body (1) side is provided inside the transmission shaft holder (4). In the apparatus, the transmission shaft holder (4) is provided through a position below the grain culm conveying path, and a crank driving unit (43) for directly taking out a driving force for driving the cutting blade from the vertical transmission shaft (11) is provided. a second transmission shaft casing (6) from body (1) side of the lower position (4) Only further the merging portion of the crank drive (43) cereal 稈搬 feed path (9) Combine the cutting blade drive device formed by providing in front of. The cutting blade drive of a combine according to claim 1, wherein the crank driving part (43) and the crank part (37) are connected by a rod (42), and the rod (42) cranks in a front-rear and left-right plane. apparatus.

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