JP3368162B2 - Combine harvester structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester structure, and more particularly, to a drive portion of a harvester while smoothly driving the harvester. The present invention relates to a technique for preventing wrapping of a piece of straw or biting of a foreign substance. 2. Description of the Related Art A clipper-type reaper is disclosed in
As shown in Japanese Patent No. 35824, a structure in which a cutting blade crank for driving a movable blade is rotated about a vertical axis is disclosed in Japanese Utility Model Laid-Open No. 63-163116 and Japanese Patent Laid-Open No. 7-322738.
There is a structure in which a cutting blade crank is rotated around a front-rear axis as disclosed in Japanese Unexamined Patent Publication (Kokai) No. H11-15095. [0003] Regardless of which of the above-mentioned shaft centers is adopted, the crank-shaped driving rotating body is rotated, so that the clipper-type reaper has a large load variation accompanying the driving. The operation tends to be non-smooth, for example, rotation vibration is likely to occur. Thus, providing a balance weight on the cutting blade crank can reduce rotational vibration, and providing a flywheel has advantages such as reduced load fluctuation and stable operation. On the other hand, in the structure in which the cutting blade crank is rotated around the vertical axis, the front-rear distance between the pressing portion of the crank and the movable blade changes with the rotation. There is an advantage that the front-rear distance between the pressing action portion and the movable blade does not change, and the pressing action can be performed at a position close to the sliding portion of the cutting blade. That is, in terms of smoothness of the drive structure, it seems better to adopt the longitudinal axis. In view of the above-mentioned circumstances, the present invention employs a clipper-type mowing apparatus in which a drive unit of a cutting blade is provided with a longitudinal axis and a means for smoothing operation.
It is an object of the present invention to realize the apparatus without any inconvenience such as interference with other mechanical devices constituting a mowing unit and hindrance to grain culm conveyance. [Means for Solving the Problems] A first invention comprises a movable blade slidable to the left and right, and a crank-shaped driving rotator for reciprocating the movable blade in the left-right direction. In the cutting part structure of a combine equipped with a clipper-type cutting device and a vertical conveying device for transferring the cut stalks obliquely upward and laterally toward the feed chain start end, the rotation axis is set to the front and rear. The drive rotating body is arranged on the uncut side of the mowing device, and the drive rotating body is
A shaft portion provided with a power input portion for inputting rotational power to an intermediate portion in the front-rear direction, and a pressing action portion for moving the movable blade provided forward of the power input portion of the shaft portion. A flywheel for smoothly driving the driving rotator is attached to a rear end portion of the support shaft portion behind the power input unit, and a pressing operation on the front side of the power input unit is provided.
At a position facing the opposite side of the rotating shaft center with respect to the
A balance weight for reducing rotational vibration is provided. According to the configuration of the first aspect, since the bias of the balance due to the crank shape of the driving rotary body is reduced by the operation smoothing means, the rotational vibration of the driving rotary body is reduced. In addition, a stable operation can be achieved with less load fluctuation. Then, the harvested culm is fed obliquely backward and upward in the horizontal direction toward the feed chain start end by the vertical transport device, and the driving rotating body is on the already cut side of the cutting device (usually the left side).
In this case, the operation smoothing means provided at the rear end of the driving rotating body is located just below the transported grain culm. The inconvenience of wrapping or biting into the forming means is likely to occur. However, in the present invention, since the driving rotary body is disposed on the uncut side (usually on the right side) of the mowing device, the operation smoothing means is separated rightward from the vertical transport path in plan view. It is located at the location, so that the above-mentioned inconvenience does not occur. Therefore, the mowing device employing the driving rotary body having the longitudinal axis can be disposed in the mowing part without any inconvenience while the operation smoothing means is in a state of normal rotation function. If the rotation axis of the driving rotary body is directed forward and backward, there is an advantage that the position of the cutting blade drive unit can be made closer to the sliding portion as compared with the structure having the vertical axis center. Since the shaft needs to be firmly supported near the cutting blade drive portion, there is not enough room at the front of the cutting blade drive shaft, and it is difficult to dispose the above-mentioned operation smoothing means. On the other hand, there are no mechanical devices behind the cutting blade drive shaft, it is easy to secure space, and the operation smoothing means can be easily arranged behind the power input unit, and its capacity is sufficient. Can be set. Further , since the operation smoothing means is a flywheel, the rotational inertia mass of the driving rotating body is increased. Therefore, even if the load fluctuation of the reaper becomes large, such as a sudden increase in the density of cereal stems, the sudden increase in load does not directly act on the engine, but acts as a smoothed load. And can cope with a large cutting load. Further, since the balance weight for reducing the rotational vibration is provided, the bias of the weight balance due to the crank shape of the driving rotating body is improved, and the rotational vibration is reduced. This can have a positive effect on the riding feeling of the vehicle. And, since the balance weight is attached to the drive rotating body on the front side of the power input unit,
The balance weight is located at substantially the same position in the axial direction as the pressing action portion for moving the movable blade, so that torsional vibration due to rotation caused by the separation in the axial direction hardly occurs. [Effect] In the combine described in the first aspect, the clipper-type reaping device is smoothly arranged by employing the front-rear rotation axis of the driving rotating body which is advantageous for driving the movable blade and the operation smoothing means. Thus, a reasonable mowing portion structure is obtained in which a trouble is hardly caused such as winding of the straw around the rotary operation smoothing means while having sufficient capacity so as to be able to be driven. [0013] The flywheel is used to change the cutting load.
It has the advantage that it is hardly affected by
Rotating vibration can be reduced without difficulty by using weights to cut
There is an advantage that the device can be driven more smoothly. FIG. 1 is a side view of a self-removable combine harvester with two rows of cuts.
A cutting section 4 which is a pre-cutting device is connected to the front of the body 2 having a horizontal axis fulcrum P so as to be vertically oscillated by a hydraulic cylinder 3. A device 5, a control unit 6, a grain hopper 7, an engine 8, and the like are mounted. As shown in FIG. 1 and FIG.
The reaper main frame 9 supported so as to be able to swing up and down around the horizontal axis fulcrum P, and a pair of right and left raising devices 10 arranged in parallel
a, 10b, a clipper-type cutting device 11 for cutting the root of the raised grain culm, a pair of left and right packers 12a, 12b that rake the harvested grain culm into the middle of the cutting width, and diagonally forward from the top of each packer. A pair of left and right auxiliary transporting devices 13, 13 extended in a cantilever manner, a vertical transporting device 15 for transporting the cut culm to the upper rear and transferring it to the feed chain 14 of the threshing device 5 in a sideways posture are provided. I have. The vertical transport device 15 comprises a stock-holding / transporting mechanism 15a acting on the grain culm stock side and a head engaging transport mechanism 15b acting on the grain culm tip side. It is configured to be able to adjust the handling depth by swinging up and down around the center. Next, the transmission system will be described. As shown in FIG. 8, the output of the engine 8 is branched into a working system and a traveling system, one branch power is transmitted to a threshing device 5 and a grain discharge mechanism of a grain hopper 7, and the other branch power is used for traveling. The transmission is transmitted to a hydrostatic continuously variable transmission (HST) 16 as a transmission for the vehicle, and after being appropriately shifted, decelerated by a transmission case 17 and transmitted to the left and right crawler traveling devices 1. Also,
The shift output of the hydrostatic continuously variable transmission 16 is branched in the transmission case 17, and a part of the branch power is transmitted to the reaper 4. More specifically, as shown in FIG. 3, FIG. 4 and FIG. 8, a cutting section support stand (not shown) provided upright at the front portion of the machine body 1 has a horizontal fulcrum serving as a swinging fulcrum of the cutting section. A driving shaft 19 is horizontally mounted via a bracket (not shown) coaxially with the shaft fulcrum P, and the driving shaft 19 and the mowing portion drive shaft 21 of the transmission case 17 are connected to each other by the one-way clutch 22 and the belt transmission mechanism 2.
3, and only the forward rotation power of the branch transmission power is transmitted to the driving shaft 19 as the mowing unit driving force. A base boss portion (not shown) of the mowing portion main frame 9 is supported so as to be able to slide horizontally along the driving shaft 19, and the base boss portion transmits torque to the driving shaft 19. A bevel gear 24 externally fitted so as to be slidable freely and a bevel gear 25 meshing with the bevel gear 24 are mounted so as to be laterally movable together with the base boss.
A pipe frame 27 that supports the front-rear transmission shaft 26 extends forward from the base boss, and a bevel gear 25 is connected to the rear end of the front-rear transmission shaft 26. As shown in FIG. 2, FIG. 5, and FIG. 6, a tubular transmission case 28 is connected to the front end of the reaping portion main frame 9 horizontally and horizontally. The weeding frames 29a, 29b, 29c are extended, and the lower portions of the left and right raising devices 10a, 10b are connected and supported at the front of the left and right weeding frames 29a, 29b.
The reaper 11 is mounted horizontally across the three weeding frames 29a, 29b, and 29c. As shown in FIGS. 3 and 6 to 8, the front end of the pipe frame 27 and the upper part of the right raising device 10a are connected by a bevel gear case 30, and
The bevel gear 6 and the input shaft 31a of the raising device 10a are linked. At the lower part of the bevel gear case 30, a cylindrical case 33 in which a vertical intermediate transmission shaft 32 interlocked with the front and rear transmission shaft 26 extends is extended, and further, an intermediate bevel gear case 34 is provided at a lower part thereof. ing. From the intermediate bevel gear case 34, vertically-oriented transmission shafts 35 and 36 extend in the form of an inner and outer double shaft toward the lower transmission case 28. The vertical transmission shaft 35 on the inner side is the intermediate transmission shaft 32
The lower end of the vertical transmission shaft 35 is inserted into a bevel gear case 37 provided at the right end of the transmission case 28 so that the lower end of the transmission case 28
The transmission bevel gear mechanism 53 is connected to the lateral transmission shaft 38 inserted through the
Are linked by Further, the outer cylindrical transmission shaft 36 disposed outside is also interlocked with the lower end of the intermediate transmission shaft 32 in a decelerated state with a bevel gear, and the right packer 12a is attached to the lower portion thereof via a torque limiter 39. On the right side of the packer 12a, a right scraping conveyor belt 13a is wound around a driving pulley 40a provided on the upper part. The left and right auxiliary transporting devices 13 include a driving pulley 4
0a, 40b and the driven pulley 49a, 49b disposed diagonally forward of the conveyor belt 1 with a locking projection.
3a and 13b are wound. It should be noted that the left packer 12b is driven relative to the right packer 12a.
Is an occlusal drive structure. A pipe frame 42 is erected from the left end of the transmission case 28 via a bevel gear case 41, and a horizontal transmission shaft 38 inserted through the transmission case 28 and a vertical transmission shaft 43 inserted through the pipe frame 42 are bevel gears. Are linked. In addition, the upper end of the pipe frame 42 and the upper part of the left raising device 10b are connected to the bevel gear case 44.
The vertical transmission shaft 43 inserted through the pipe frame 42 and the input shaft 31b of the raising device 10b are interlocked with the bevel gear. In a bevel gear case 37 provided at the right end of the transmission case 28, a cutting blade drive shaft (an example of a support shaft) 45 extending in the front-rear direction and an inner vertical transmission shaft 35 are provided with a cutting blade bevel gear mechanism ( An example of a power input unit) 52, the crank 46 provided at the front end of the cutting blade drive shaft 45, and the vertical knife head 4 provided in the reaper 11.
7 is engaged, and the cutting device 11 is reciprocally driven left and right at a constant stroke by rotation of the cutting blade drive shaft 45. The structure of the mowing device 11 will be described. As shown in FIGS. 3 to 7, the mowing device 11 includes a cutting blade base 8 mounted over the weeding frames 29a, 29b, and 29c.
The fixed blade 81 is fixed at 0, the movable blade 82 is slidable left and right with respect to the fixed blade 81, and the knife head 47 is fixed to the movable blade 82 via a mounting stay 83. The knife head 47 is made of a plate material bent in a U-shape that is open rearward in a plan view, has a pair of passive surfaces 47a, 47a formed at intervals in the left-right direction, and has a front-rear axis X. The outer diameter of the bearing 84 provided at D is just fitted inside the knife head 47. The driving rotary body D is formed by welding a cutting blade crank 46 to the tip of a cutting blade drive shaft 45, and a bearing 84 is rotatably supported on the cutting blade crank 46. As shown in FIGS. 4 and 6, the movable blade 82 and the mounting stay 83 are integrated by a rivet or the like with a slider 85 sliding on the rear end surface of the fixed blade 81.
A slide plate 87 that is tightened up and fixed together with a knife clip 86 that holds the movable blade 2 slides in contact with the rear end surface of the slider 85 so that the movable blade 82 is positioned vertically and vertically and slides only to the left and right. ing. A recess 80a into which the knife head 47 enters the front is formed at the rear edge of the cutting blade stand 80, and the bearing 84, that is, the crank 46 is arranged so as to enter the recess. The axis X of the cutting blade drive shaft 45 is positioned substantially at the center of the knife head 47 in the vertical direction, and the movable blade 82 is positioned at the height level substantially in the vertical direction of the rotation trajectory of the crank 46. In addition, bearings 8 at the upper and lower limits of the rotational trajectory of crank 46
The vertical length of the knife head 47 is set to be slightly longer than the vertical distance between the four centers Y. That is, the crank 46 is moved to the knife head 47
The front-rear spacing and the vertical spacing between the point of force pressing the passive surface 47a of the movable blade 82 and the point of application, which is the point of left and right sliding movement of the movable blade 82, are all short, and the movable blade 82 slides smoothly. It can be driven. The crank 46 has a weight portion (corresponding to a balance weight) 88 bulging in the axial direction on the opposite side of the bearing 84 mounting portion with respect to the rotation axis X.
, And functions as a balancer for reducing vibrations accompanying rotation of the crank 46. The driving rotator D will be described in detail. As shown in FIGS. 6 and 7, a support shaft 89 (corresponding to a pressing portion) of a bearing 84 for moving the movable blade and a balance weight 88 (corresponding to an operation smoothing means E) for reducing rotational vibration are cast. And the weight portion 88 has an outer diameter and a rearwardly projecting portion as far as possible without contacting the bevel gear case 37, and is lightweight and highly efficient with high balance action. The balancer is configured. A rear portion of the cutting blade drive shaft 45 protrudes from the bevel gear case 37, and a flywheel (an example of an operation smoothing unit E) for smoothing a load variation due to rotation.
92 are mounted. As shown in FIG. 4, the bevel gear case 37
The (cutting blade bevel gear mechanism 52) is disposed on the right side of the mowing device 11, and is laid out at a position away from the grain conveying path of the vertical conveying device 15 to the right (to the uncut side). Accordingly, it is difficult for the straw, dust and the like falling from the vertically transported grain stem to fall on the flywheel 92 attached to the rear end of the cutting blade drive shaft 45. [Other Embodiments] As shown in FIG. 9, flywheels 93 and 94 are provided before and after the bevel gear case 37 in the cutting blade drive shaft 45, and a balance weight 88 is integrally formed on the rear flywheel 94. Alternatively, a structure equipped as a balancer (an example of a rotary operation smoothing unit) may be used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of a combine. FIG. 2 is a plan view showing a front portion of a cutting unit. FIG. 3 is a cross-sectional view showing a base of a transmission system to the cutting unit. FIG. 5 is a front view showing a part of the power transmission system of the mowing unit. FIG. 6 is a vertical sectional side view showing an auxiliary transport device in the power transmitting system of the mowing unit. FIG. 7 is a drive system of the mowing device. Cross-sectional plan view [FIG. 8] Transmission system diagram to reaping section [FIG. 9] Cross-sectional view showing another arrangement structure of operation smoothing means [Description of reference numerals] 11 reaping apparatus 14 feed chain 15 vertical transport apparatus 45 support shaft section 52 Power input unit 82 Movable blade 88 Balance weight 89 Support shaft 92 Flywheel D Drive rotator E Smoothing means X Rotation axis

Continuation of the front page (56) References JP-A-6-209634 (JP, A) JP-A-6-62633 (JP, A) JP-A-7-322738 (JP, A) , U) Japanese Utility Model Hei 5-39235 (JP, U) Japanese Utility Model Sho 59-6442 (JP, U) Japanese Patent Publication No. 28-5059 (JP, B1) (58) Fields surveyed (Int. Cl. ⁷ , DB A01D 34/30

Claims (1)

(1) A clipper-type mowing device including a movable blade slidable left and right, and a crank-shaped driving rotating body that reciprocates the movable blade in the left-right direction. And a vertical conveying device for obliquely transporting the harvested culm toward the feed chain start end in an up-and-down direction, wherein the drive rotator has a rotary shaft center set in a front-rear direction. Is disposed on the uncut side of the mowing device, and the driving rotary body is provided with a spindle portion having a power input portion for inputting rotational power to an intermediate portion in the front-rear direction, and the power input portion of the spindle portion. And a pressing action portion for moving the movable blade provided on the front side more than the power input portion, for smoothly driving the driving rotary body at a rear end side portion of the support shaft portion behind the power input portion. Install the flywheel, the pressing action of the front side of the power input unit It said to the
Combine harvester structure with a balance weight to reduce rotational vibration at a position opposite to the rotation axis center