JPH0740826B2 - Stem culm harvesting machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stem culm harvesting machine for cutting and harvesting stalks planted in fields such as soybeans.

[Problems to be Solved by Prior Art and Invention] Generally, in this seed culm harvesting machine, a pretreatment unit provided with a cutting blade is used to perform cutting and harvesting work in correspondence with ridges. When performing harvesting work or split work of
It may not be possible to run the aircraft so that the pre-processing unit coincides with the ridge position, and therefore it has been proposed to move the pre-processing unit to the left and right. Conventionally, for example, the pretreatment unit is displaced laterally by using a parallel link mechanism as shown in Japanese Patent Publication No. 49-46727, or the pretreatment unit as disclosed in Japanese Patent Laid-Open No. 64-20021. It is known that the part is displaced laterally by using a helical spline shaft. However, in the former one, no consideration is given to the relationship between the front and rear swinging fulcrums of the parallel link mechanism and the swinging fulcrum of the lifting carrier for power transmission to the pretreatment section, so the pretreatment section is left and right. In order to respond to the change in the posture of the swingable carrier following the movement to, the one that is fixed to the pretreatment unit side and the one that is the fuselage side, and the one that both ends are swingably connected to these As a result, the structure becomes complicated, and the lifting and conveying route of the stem culm varies greatly with the movement of the pretreatment section, so that the stem culm cannot be transferred smoothly. There is a problem that a new defect occurs.

On the other hand, the latter uses a helical spline shaft, so this is not the case, but this one requires a long helical spline shaft in the left-right direction at the lower end of the transmission shaft, close to the field scene. is there. As a result, a bellows-shaped cover member for covering the helical spline shaft is required separately, and since this is close to a field scene, it is not easy for mud to adhere here, and the stems are easily entangled, Furthermore, there is a problem that uncut stems and stumps come into contact with each other and are damaged early.

[Means for Solving the Problem] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a stem culm harvesting machine capable of eliminating these problems. The transmission shaft for transmitting the power from the machine body side to the input shaft of the pretreatment unit equipped with a cutting blade for use is divided into the machine body side and the pretreatment side, and the machine body side shaft half and the shaft half are While supporting the cover case cylinder on the machine body side so as to be able to swing up and down, the bracket provided at the tip of the case cylinder and the pretreatment unit are movably connected to each other via a parallel link mechanism, and Both ends of the pretreatment unit side shaft half are respectively connected to the machine body side shaft half and the pretreatment unit side input shaft through universal joint mechanisms at positions substantially corresponding to the fulcrum positions on both sides in the link direction of the parallel link mechanism. It is characterized by being connected.

According to the present invention, the parallel link mechanism allows the pretreatment section to be laterally displaced, while enabling ideal power transmission to the pretreatment section. is there.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a stem and culm harvesting machine,
Is a pretreatment unit 2 described below, a shredding unit 3 for shredding the cut stalks, a stalk scraping unit 4 for forcibly feeding the stalks to the shredding unit 3, and a screening process for shattered grains. It is the same as that of the related art that it is configured by the member unit such as the sorting unit 5 that performs the above-described operation, the crawler type traveling device 6, and the like.

A pair of left and right columns 1b are integrally erected on the front part of the body frame 1a of the harvester 1, and a transmission shaft 7 is attached to a bracket 8a integrally bolted to the upper end of the columns 1b.
The left and right ends of the case 8 for covering are supported rotatably around the axis. Further, of the columns 1b, a case 9 is integrally fixed to the outer column 1b, and the upper end of the intermediate shaft 10 and the outer end of the transmission shaft 7 housed in the case 9 are bevel gear mechanism 11. Are linked by.

On the other hand, the output shaft 13 from the transmission case 12 and the inner end of the intermediate shaft 14 are integrally connected by spline fitting to the connecting member 15.
The outer end portion of the auxiliary shaft 16 and the inner end portion of the auxiliary shaft 16 are integrally connected by spline fitting to the connecting member 15a, and the auxiliary shaft 16 and the intermediate shaft 10 are interlocked by the bevel gear mechanism 11a. It is connected. Reference numeral 17 denotes a case that covers the intermediate shaft 14. The inner end of the case 17 is slidably fitted onto the boss 12a of the transmission case 12, and the outer end is the lower end of the case 9. Although it is slidably fitted onto the boss portion 9a provided on the case 17, the case 17 is restrained from moving outward by the stop ring 17a in a state of substantially abutting the transmission side boss portion 12a. When the stop ring 17a is removed, the case 17 is moved to the outside by being guided by the boss portion 9a, whereby the output shaft 13 and the intermediate shaft 14 are separated from each other. The connecting portion using the connecting member 15 is exposed so that the attaching / detaching work can be easily performed.

In this way, the transmission shaft 7 that is power-transmitted to the engine side is interlocked and coupled to the first output shaft 19 for driving the lifting conveyance body described later through the worm gear mechanism 18, while the bevel gear mechanism 20 is connected. It is interlocked with a second output shaft 21 for driving the cutting blade 23 and the like. The second output shaft 21 is provided with a body-side shaft half portion 21a provided with the bevel gear mechanism 20 and a universal joint (corresponding to a universal joint mechanism of the present invention) 24, 24a provided at both ends thereof. It is divided into two parts, a processing part side shaft half part 21b, and both shaft half parts 21a and 21b are flexibly connected by a universal joint 24, but a case that covers the fuselage side shaft half part 21a. A bracket 25a is integrally attached to the tip of the cylinder 25. A telescopic cylinder 26 that constitutes an elevating mechanism of the pretreatment section 2 is interposed between the bracket 25a and the machine body frame 1a.
By the extension and contraction of the extension and contraction cylinder 26, the pretreatment unit 2 is moved up and down including the cutting height adjustment.

Further, the base end portions of a pair of link arms 27 forming a parallel link mechanism arranged so as to sandwich the shaft half portion 21b on the side of the pretreatment unit on the left and right sides are swingably connected to the bracket 25a with the support shaft 27a as a fulcrum. On the other hand, the tip end of the link arm 27 is swingably connected to the frame 2a of the pretreatment unit 2 via a support shaft 27b. The positions of these support shafts 27a and 27b are
A universal joint for interlocking with a position where the universal joint 24 is provided and an input shaft 28 incorporated in the pretreatment portion side shaft half portion 21b and the pretreatment portion frame 2a.
The position of 24a and the direction of the link (front-back direction) are arranged to substantially coincide with each other, whereby the preprocessing unit 2 is configured to be movable left and right. Then, the power input to the input shaft 28 is transmitted to the tip side and the stocker side stem culm scraping bodies 31, 32 via the transmission shaft 29 and the worm gear mechanism 30, while the cutting blade 23 via the bevel gear mechanism 33. It is also configured to be transmitted to the side. The pre-processing portion side shaft half portion 21b is provided with a spline fitting means 21c and is configured to be extendable / contractible in the longitudinal direction.
The structure is configured to absorb the error in the movement stroke due to the position not accurately corresponding to the positions of the link support shafts 27a and 27b.

34 is an operating rod, and the tip end of the operating rod 34 is screwed into a screw cylinder 35 provided on the inner link arm 27 via a pin 27c so as to be swingable, while the base end of the operating rod 34 is The bracket 25a
The support metal fitting 25b provided on the pierce through so as to be rotatable about the axis and regulated to move in the axis direction, but a pin 34a is further provided at the outer end so as to project, and in a crank shape. A connecting plate 36b having a long hole 36a formed therein is provided at the tip of the bent handle 36, and a pin 34a is loosely fitted in the long hole 36a. When the handle 36 is guided in the elongated hole 36a and pushed inward, the handle 36 has a small-diameter portion 34b provided at the outer end of the operating rod 34 and a fitting hole 3 formed at the tip of the handle.
6d is externally fitted, whereby the handle 36 and the operating rod 34 are integrated, and by the rotation of the operating rod 34 following the turning of the handle 36, the operating rod 34 is referenced with respect to the support metal fitting 26a. The link arm 27 is moved in the left-right direction to swing the link arm 27, so that the pre-processing section 2 can be displaced in the left-right direction. The operating rod 34 is provided with a left and right lock nut 34c, and when the lock rod 34c hits one of the left and right ends of the screw cylinder 35, further movement of the operating rod 34 is restricted. The right / right movement amount of the section 2 is determined. Of course, the rotation of the operating rod may be automatically performed using a motor, and it is more convenient if the switch operation is performed in the driver's seat.

On the other hand, 37 is a tip-side lifting carrier, 38 is a stocker-side lifting carrier, and these carriers 37 and 38 are overlapped up and down on the starting side of the transfer and the culm is collapsed on the ending side of the transfer. Although it is arranged in a posture in which it spreads to the left and right to be lifted and transported, the transporting end portion of the stock-side lifting transporter 38 has a cover cylinder 39 covering the first output shaft 19 via an arm 38a. On the other hand, the support shaft 37c of the sprocket on the transfer end side of the tip side lifting transfer body 37 is swingably supported on the machine side. Furthermore, the tip-side lifting carrier 37 is linked to the first output shaft 19 via the chain transmission mechanism 40, and is configured by using a carrier chain with a claw 37b wound inside the carrier case. In addition, the stock carrier side lifting carrier 38 is a carrier chain 38.
b is directly meshed with the sprocket provided on the first output shaft 19, and the stem culm is lifted and conveyed as the first output shaft 19 rotates. The shaft core 38d of the lower end sprocket 38c of the 38 is attached to the swing link 40 on the pretreatment unit 2 side.
Are connected via. On the other hand, the tip side lifting carrier 37
On the lower side, the swing link 41 is attached to the stock carrier side lifting carrier 38.
Are connected via. And these lifting carriers 37,
As described above, the reference numeral 38 is configured to swing left and right around the axis of the first output shaft 19 when the pretreatment unit 2 is displaced left and right by the link operation as described above. In this case, when the pretreatment unit 2 is moved in the left-right direction by L by the operation of the parallel link mechanism, the pretreatment unit 2 is displaced by A in the front-rear direction. The starting end side also follows the pre-processing unit 2 and moves left and right by L. At this time, the deviation amount in the front-rear direction of the stock-side lifting carrier 38 swinging about the shaft 19 is B, and the front-back direction of the stock-side lifting carrier 37 swinging around the shaft 37c. The amount of deviation is C, but the swing range of the link arm 27 is selected so that these deviations are close to each other. Particularly, in the embodiment, the amount of deviation is B>A>.
With respect to the relationship of C, the deviation in the front-rear direction of the tip end side and the stocker side lifting conveyors 37, 38 is set to be averaged with respect to the deviation in the front-rear direction of the pretreatment unit 2.

Further, in this one, the positional relationship between the two lifting carriers 37, 38 on the transport start end side, that is, the axis of the transport start end side sprocket,
As shown in FIG. 6, when the pretreatment section is displaced to the right side, the relationship is shifted by D. On the other hand, when the pretreatment section 2 is displaced to the left side, the deviation amount E in the left-right direction is the deviation. It is set so as to be substantially equal to the amount D, whereby the transport state at the transport start end portions of the lifting transporters 37, 38 is changed.
It is designed so that it does not change as much as possible even when it is laterally displaced, and it is configured so that reliable culm transfer is always performed.

Further, in this structure, the axial direction of the pretreatment unit side shaft half 21b is not parallel to the link direction of the link arm 27 of the parallel link mechanism, and the pretreatment unit side tip is displaced outward. In the normal use state in which the pretreatment unit 2 is displaced to the outside of the machine body, the transmission shaft 21 is bent to the outside of the link arm 27, and the pretreatment unit 2 is set to perform a ridge work or the like. The amount of inward bending of the transmission shaft 21 when displaced to the inside of the machine is smaller than that of the link arm 27, so that the bending angles of the universal joints 24 and 24a do not become excessive. .

On the other hand, the stem culm scraping section 4 is arranged on the stem culm input port side of the shattering section 3 and forcibly supplies the stalks lifted and conveyed to the shattering section 3. The scraping body 51 forming the culm scraping portion 4 is configured to be retractable upward for manual handling. That is, the left and right side plates are in front of the stem culm inlet.
Although a shaft 43 is provided, a support shaft 44 is attached to the side plate 43.
Although it is rotatably supported via a, a transmission gear 45 and a sprocket 46 are integrally fixed to the outer end of the support shaft 44. Then, this sprocket 46 and a sprocket 47 fixed to a transmission shaft 47 rotatably provided on the outer side plate 43.
Chain 48 is wound and linked with a. Incidentally, 49 is a sprocket for tension.

Further, an operating cylinder shaft 50 provided so as to cover the transmission shaft 44.
Is rotatably supported by a boss portion 43a formed on the left and right side plates 43, and a scraping body 51 is integrally attached to the operating cylinder shaft 50 via a support frame 52. The scraping body 51 is configured so as to be capable of swinging displacement between a scraping working position on the lower side and a non-working position on the upper side with the axis of the actuating cylinder shaft 50 as a fulcrum.

Reference numeral 53 is an operating shaft for operating the scraping chain 51a of the scraping body 51, and the operating shaft 53 is attached to the scraping body 51 by a bearing 53a.
The outer end of the operating shaft 53 projects outward through a long hole 43b formed in the side plate 43, and the final gear is attached to the projecting end.
54 is integrally attached. On the other hand, the transmission gear 45 is always meshed with the intermediate gear 55, and the final gear 54 on the scraping body 51 side is selectively meshed with the intermediate gear 55. In other words, the final gear 54 is
When 51 is in the acting posture described above, it meshes with the intermediate gear 55, but when it is in the non-acting posture, it moves upward and is disengaged from the intermediate gear 55, whereby the gear clutch automatically moves. It is configured to cut. In the present embodiment, the scraping body 56 is also arranged on the lower side so as to face the scraping body 51. However, the lower scraping body 56 is always configured to scrape.

Reference numeral 57 denotes a cover that covers the upper scraping body 51 from the upper side. The cover 57 is pivotally supported on the side plate 43 by a support shaft 57a so as to be vertically swingable, while the operating cylinder shaft 50 has a cover 57. The base end portion of the substantially-shaped support frame 58 is integrally connected to support the operation lever.The operation lever 59 is further provided on the support frame 58 so as to project from the base end portion of the operation lever 59. The locking hook 60 is further fixed integrally. A release pin 61 is provided on the side plate 43 so as to correspond to the locking hook 60 when the cover 57 is closed, and the release pin 61 always has its front end locked by the ammunition 61a. Is urged toward the side engaging with. And release pin 61
In the state where is engaged with the locking hook 60, the upward movement of the scraping body 51 together with the cover 57 to the non-acting posture is restricted, but from this state, the sweeping body 51 is set to the non-acting position. Pulls the release pin 61 against the ammunition 61a to release the engagement with the locking hook 60, and if the operating lever 59 is gripped and lifted in this state, the scraping body 51 does not work together with the cover 57. It is configured so that it is displaced to the posture and the gear clutch is also in the disconnected state as described above. The support frame 58
An engaging pin 58a is provided on the cover 57, and the engaging pin 58a is loosely fitted in a guide hole 57b provided on the cover 57 side to support the opening and closing of the cover 57.

In the embodiment of the present invention configured as described above, the preprocessing unit 2 is displaced leftward and rightward by the parallel link mechanism by the left and right link arms 27, so that the preprocessing unit 2 is moved to the ridge position. Although it is possible to perform harvesting work by displacing it to the optimum position, this parallel link mechanism divides the transmission shaft 21 for transmitting power from the machine side to the pretreatment unit 2 into two, and the pretreatment side shaft. Both ends of the half portion 21b are respectively connected to the machine body side shaft half portion 21a and the pretreatment portion side input shaft 28 through the universal joints 24 and 24a at positions substantially corresponding to both support shafts in the link direction of the parallel link mechanism. It is connected. Therefore, when the pretreatment unit 2 is moved left and right using the parallel link mechanism, the machine body side shaft half 21a remains as it is, and only the pretreatment unit side shaft half 21b is subjected to the swing displacement of the parallel link mechanism. Following this, power will be transmitted in a bent state based on the universal joints 24 and 24a.

Therefore, even though the parallel link mechanism is used, the machine-side coupling structure of the transmission shaft 21 can be a general-purpose type as it is, like the fixed type in which the pretreatment section does not move left and right. The operating rod, which is a member for moving the pretreatment unit 2 left and right, does not have a complicated structure,
Since it can be placed at a high place away from the field scene, it is possible to reliably prevent problems such as muddy soil adhering and stalks being entangled.

[Advantages] In summary, since the present invention is configured as described above, the pretreatment unit is configured to be adjustable in left and right movements by using the parallel link mechanism that can simplify the structure. While the left and right position can be adjusted according to the ridge position, the transmission shaft for power transmission to the pretreatment unit is divided,
Both ends of the shaft half of the pretreatment section are made to correspond approximately to the fulcrum positions on both sides of the parallel link mechanism in the link direction, and the half shaft of the machine side and the input shaft of the pretreatment section are folded through the universal joint mechanism. When the pretreatment section is flexibly connected, and the pretreatment section moves to the left or right due to the operation of the parallel link mechanism, the transmission shaft is bent in the half section of the pretreatment section side shaft in response to the swing displacement of the parallel link mechanism. Power is transmitted to the pretreatment section side in the displaced state. As a result, the half of the transmission shaft on the fuselage side should be connected to the fuselage side by adopting the same simple and generalized connection structure as the fixed type in which the pretreatment part does not move to the left and right. There is no problem that affects the transportation route of the lifting transporter that lifts and transports the stems.

Moreover, the horizontal movement of the pretreatment unit may be performed by the horizontal swinging operation of the parallel link mechanism, and the operating member for this purpose is, regardless of the lower end position of the transmission shaft, like an object using a conventional helical spline shaft, It can be installed higher than that, and the height above the ground can be made high, so that the problems that mud adheres to these members and the culms are entangled can be effectively avoided, and the reliability is high for a long time. It will be possible.

[Brief description of drawings]

The drawings show an embodiment of a stem-culm harvesting machine according to the present invention, wherein FIG. 1 is a schematic side view of the stem-culm harvesting machine, FIG. 2 is a plan view of a pretreatment unit, FIG. FIG. 4 is an operation explanatory view of the parallel link mechanism showing a state in which the pretreatment unit is moved to the left and right;
FIG. 6 is an explanatory view of the parallel link mechanism and the left / right displacement state of the lifting carrier, FIG. 6 is a mechanism explanatory view showing the left / right displacement state of the same, and FIG. 7 is a side view showing the stem-culm scraping cover. 8 is a side view showing the clutch gear meshing state of the same portion, FIG. 9 is a front view of the same portion, and FIG. 10 is a developed sectional view of the same portion. In the figure, 1 is a stem and culm harvester, 2 is a pretreatment unit, 21 is a transmission shaft, 21
Reference numeral a is a fuselage-side shaft half portion, 21b is a pretreatment portion-side shaft half portion, 24 and 24a are universal joints, 25 is a case cylinder, 25a is a bracket, and 28 is an input shaft.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Hosoda, 667 Izaiya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture 1 Mitsubishi Agricultural Machinery Co., Ltd. Address 1 Within Mitsubishi Agricultural Machinery Co., Ltd. (56) References Japanese Patent Laid-Open No. 64-20021 (JP, A)

Claims (1)

[Claims] Claim: What is claimed is: 1. A transmission shaft for transmitting power from the machine body side to an input shaft of a pretreatment section equipped with a cutting blade for cutting stalks is divided into a machine body side and a pretreatment side, and a machine body side shaft. While supporting a case cylinder covering the shaft half part together with the half part on the body side of the machine body so as to be vertically swingable, the bracket provided at the tip of the case cylinder and the pretreatment part are connected via a parallel link mechanism. It is connected so that it can move left and right, and both ends of the shaft half on the pretreatment unit side are connected to the shaft half on the machine side through the universal joint mechanism at positions that roughly correspond to the fulcrum positions on both sides in the link direction of the parallel link mechanism. A stem-and-culm harvester characterized in that it is connected to the input shaft of the processing section.