JPH02286007A - Shoot stalk harvester - Google Patents

Abstract

PURPOSE:To receive the shoot stalks without mistakes, even when the pretreatment part moves widthwise, and lift them by allowing the longitudinal displacement based on the longitudinal movement of the pretreatment part to approach the longitudinal displacement of the root-side stalk lift which swings following the displacement of the pretreatment part. CONSTITUTION:The pretreatment part is made movable widthwise by the parallel link mechanism containing link arms 27, 27, the stalk lifter on the ear side 37 and the stalk lifter on the root side 38 are vertically overlapped at their top ends and the rear ends are made swingable widthwise. When the pretreatment part moves widthwise by L by the operation of the parallel link mechanism, the pretreatment moves by A in the longitudinal direction and the lift 38 swingable around the shaft 19 moves by B in the longitudinal direction. The link arm 27 is set so that it can swing toward the lift 37 in larger amplitude than that toward the lift 38 and the displacement B is allowed to approach the displacement A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a stem culm harvester for cutting and harvesting the stem culms of soybeans and the like planted in a field.

[Prior art and problems to be solved by the invention] Generally,
This seed stem culm harvester performs reaping and harvesting work by aligning the pre-processing section equipped with cutting blades with the ridges, but when harvesting at the edge of the ridges or splitting in the middle, the It may not be possible to move the aircraft so that the processing section coincides with the ridge position, and therefore it has been proposed to move the preprocessing section from side to side. Conventionally, such devices include those in which the pre-processing section is displaced from side to side using a parallel link mechanism, as shown in Japanese Patent Publication No. 49-46727, and those in which the pre-processing section is displaced left and right using a parallel link mechanism, and those shown in Japanese Patent Application Laid-open No. 64-20021. There is a known device in which the part is displaced from side to side using a helical spline shaft. However, in the former case, lifting conveyors are fixedly provided on the preprocessing section side and the machine body side respectively, and both lifting conveyors are connected by providing a bending lifting conveyor. The structure of the upper conveyor is not complicated, and consideration must be given to conveying the stem culm in a laid-down manner.

On the other hand, the latter method lifts and transports the stem culm without lodging it, but in this case, when the plant base side lifting and transporting body swings left and right following the left and right movement of the pretreatment section, The starting end of the conveyance is displaced back and forth. By the way, the plant base side lifting conveyor lifts and conveys the stem culm immediately after it has been cut with the cutting blade, so if the position of the conveyance start end is shifted back and forth, the stem culm However, there is a problem in that the receiving performance of the container is impaired and smooth lifting and transportation is not possible.

The latter has the disadvantage of not being able to take this into account.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention has been devised for the purpose of providing a stem culm harvesting machine that can eliminate these problems. A pre-processing section equipped with a cutting blade for cutting, and lifting and transporting bodies on the tip side and plant base side for lifting and transporting the stem culm cut in the pre-processing section and supplying it to the stem culm processing section side. In the stem culm reaper, the pre-processing section is connected to the machine body via a parallel link mechanism so as to be movable left and right, while the lifting conveyance bodies on the ear tip side and the stock base side are connected to the conveyance end section. The conveyor terminals are arranged in a divided manner to the left and right so that the sides expand to the left and right, and each conveyance terminal end is pivoted toward the main body side at a position rearward from the swinging shaft position of the parallel link mechanism so as to be able to swing left and right. , the swinging of the parallel link mechanism is set in a distributed manner so that the swinging start and end angles are different so that longitudinal displacement occurs before and after the left-right movement;
It is characterized in that the amount of longitudinal displacement based on the left-right movement of the pre-processing section is brought close to the amount of longitudinal displacement of the stock head-side lifting conveyor that swings following this.

With this configuration, the present invention allows the stem culm to be lifted up and transported to the stem culm processing section without being laid down, while the plant base side lifter swings following the left and right movement of the pre-processing section. The longitudinal displacement of the preprocessing section is made to be as close as possible to the longitudinal displacement of the upper conveying body.

[Example] Next, in 6 drawings for explaining an example of the present invention based on the drawings, 1 is a stem and culm harvester.

The stem culm harvester 1 includes a pre-processing section 2, which will be described later, a shedding section 3 for shedding the harvested stem culms, a stalk culm scraping section 4 for forcibly feeding the stem culms to the shedding section 3, and a "shedding section". The present invention is composed of components and devices such as a sorting section 5 for sorting the grains and a crawler-type traveling device 6, which are all conventional.

A pair of left and right columns 1b are integrally erected at the front of the body frame 1a of the harvester 1, and a bracket 8a is integrally bolted to the upper end of this column 1b.
Both left and right ends of a case 8 that covers the transmission shaft 7 are supported so as to be freely rotatable around the axis. Furthermore, a case 9 is further integrally fixed to the outer support 1b of the support 1b, and the upper end of the intermediate shaft 10 housed in the case 9 and the outer end of the transmission shaft 7 are connected to the bevel gear mechanism 11. are interlocked and linked.

On the other hand, the output shaft 13 from the transmission case 12
The inner end of the intermediate shaft 14 is integrally connected to the connecting member 15 by spline fitting, and the outer end of the intermediate shaft 14 and the inner end of the auxiliary shaft 16 are connected to the connecting member 15a. The auxiliary shaft 16 and the intermediate shaft 10 are integrally connected by spline fitting, and the auxiliary shaft 16 and the intermediate shaft 10 are interlocked and connected by a bevel gear mechanism 11a. Here 1
7 is a case that covers the intermediate shaft 14, and the inner end of the case 17 is connected to the boss portion 12 on the transmission case 12 side.
a, and the outer end is slidably fitted onto a boss portion 9a provided at the lower end of the case 9, and the case 17 substantially abuts against the transmission-side boss portion 12a. In this state, the case 17 is assembled with the retaining ring 17a restricting its outward movement. However, when the retaining ring 17a is removed, the case 17 is attached to the boss portion 9a.
The connecting portion between the output shaft 13 and the intermediate shaft 14 using the connecting member 15 is exposed, so that the attachment/detachment work can be easily performed.

In this way, the transmission shaft 7 that transmits power to the engine side is interlocked and connected via the worm gear mechanism 18 to a first output shaft 19 for moving a lifting conveyor, which will be described later. The second output shaft 21 is interlocked with the second output shaft 21 for exciting the cutting blade 23 and the like. This second output shaft 21 has a body side shaft half 21a on which the bevel gear machine 120 is provided, and a universal joint 24, 24 at both ends.
The pre-processing section side shaft half 21b is provided with A bracket 25a is integrally attached to the tip of the case tube 25 that covers the case tube 21a. A telescopic cylinder 26 is interposed between the bracket 25a and the machine frame 1a, and the telescopic cylinder 26 constitutes a lifting mechanism for the pre-processing section 2, and the mowing height of the pre-processing section 2 can be adjusted by expanding and contracting the cylinder 26. It is configured to move up and down.

Furthermore, a pair of link arms 27 constituting a parallel link mechanism are arranged to sandwich the pre-processing part side shaft half part 21b from side to side.
The base end of the link arm 27 is connected to the bracket 25a so as to be swingable left and right about the support shaft 27a.
The tip of the frame 2a of the preprocessing section 2 is attached to a support shaft 27b.
are swingably connected via the The positions of these support shafts 27a and 27b are the same as the position where the universal joint 24 is provided, and the universal joint for interlockingly connecting the preprocessing part side shaft half part 21b and the input shaft 28 incorporated in the preprocessing part frame 2a. It is arranged so as to substantially match the position of the joint 24a in the link direction (front-back direction), so that the pre-processing section 2 is configured to be freely movable left and right.

The power input to the input shaft 28 is transmitted via the transmission shaft 29 and the worm gear mechanism 30 to the tip side and stock side stalk culm rake bodies 31 and 32, and is transmitted to the cutting blade 23 via the bevel gear mechanism 33. It is configured so that it can also be transmitted to the sides. Incidentally, the pre-processing part side shaft half part 21b has a spline fitting means 21c.
is provided and is configured to be freely expandable and contractable in the longitudinal direction, thereby absorbing errors in the movement stroke due to the universal time delay and the position 24.24a not accurately corresponding to the position of the link support shafts 27a and 27b. It has become.

Reference numeral 34 denotes an operating rod, and the tip of the operating rod 34 is screwed into a threaded cylinder 35 swingably provided on the inner link arm 27 via a pin 27c. The part passes through a support fitting 25b provided on the bracket 25a so as to be rotatable around the axis but restricted from moving in the axial direction, and a pin 34a is further provided protruding from the outer end t. A connecting plate 36b having an elongated hole 36a is provided at the distal end of the handle 36, which is bent into a crank shape, and a pin 34a is loosely fitted into the elongated hole 36a. When the handle 36 is guided by the elongated hole 36a and pushed inward, the narrow diameter portion 3 provided at the outer end of the operating rod 34
4b is fitted with a matching hole 36d drilled at the tip of the handle, whereby the handle 36 and the operating rod 34 are integrated, and the operating rod 34 follows the rotation of the handle 36.
As a result of the rotation, the operating rod 34 moves in the left-right direction with respect to the support fitting 26a, causing the link arm 27 to swing, thus making it possible to move the pre-processing section 2 from side to side. . In addition, the left and right lock nuts 3 are attached to the operating rod 34.
4c is provided, and when this lock nut 34c hits either the left or right end of the threaded tube 35, further movement of the operating rod 34 is restricted, thereby determining the amount of left-right movement of the pre-processing section 2. . Of course, the operating rod may be rotated automatically using a motor, but it is more convenient if the switch is operated from the driver's seat.

On the other hand, 37 is a tip-side lifting conveyor, and 38 is a stock-side lifting conveyor. The transport end of the stock side lifting transport body 38 is attached to the cover tube 39 that covers the first output shaft 19 with an arm. 38
a, and on the other hand, the support shaft 37C of the conveyance end side sprocket of the tip side lifting conveyor 37 is rotatably supported on the body side. Furthermore, the tip side lifting conveyance body 37 is interlocked and connected to the second output shaft 19 via a chino transmission mechanism 4o.

It is constructed by using a conveyor chino with a pawl 37b wrapped in a conveyor case, and the stock side lifting conveyor 38 is configured so that the conveyor chino 38b directly engages with a sprocket provided on the second output shaft 19. As the first output shaft 19 rotates, the stem culm is lifted and conveyed.
It is connected to the preprocessing section 2 side via a swing link 4o.

On the other hand, the tip side lifting and transporting body 37 is connected to the stock head side lifting and transporting body 38 via a swing link 41 on the lower side. As described above, when the preprocessing section 2 is displaced left and right due to the link operation, these lifting conveyance bodies 37 and 38 follow this and swing left and right around the axis of the first output shaft 19. It is configured. In this case, if the preprocessing section 2 moves in the left and right direction by an amount L due to the operation of the parallel link mechanism, the preprocessing section 2 will be shifted in the front and back direction by an amount A, but the transport of the drawing transport bodies 37 and 38 The starting end side also follows the preprocessing section 2 and moves left and right by L. At this time, the amount of displacement in the front-rear direction of the stock side lifting conveyor 38 that swings around the shaft 19 is B, and the link arm 27 The left and right rocking of the head side is set so that it swings more towards the tip side lifting carrier 37 side than the stock side lifting carrier 38 side, that is, the swing start angle is greater than the end angle. The distribution is set so that the size is also small. Further, the amount of displacement in the front-rear direction of the tip-side lifting conveyor 37 that swings around the shaft 37c is C.
In particular, in the embodiment, the amount of deviation is in the relationship B>A>C, and with respect to the deviation in the front and back direction of the pre-processing section 2, the amount of deviation in the front and back direction of the tip side and stock side lifting conveyance bodies 37 and The settings are made so that the deviations are averaged out and changes in relative relationships do not become large.

Furthermore, in this case, the positional relationship between the transport start ends of the transport bodies 37 and 38 on the drawing, that is, the axis of the sprocket on the transport start end side, is only D when the preprocessing section is displaced to the right as shown in FIG. On the other hand, when the pre-processing section 2 is displaced to the left, the amount of deviation E in the left-right direction is set to approximately match the amount of deviation, and as a result, the lifting conveyance body 37, 38 The conveyance state at the conveyance start end of the stem is designed to remain unchanged as much as possible even when the pre-processing section 2 is displaced from side to side, and the structure is such that reliable stem and culm conveyance is always carried out.

Further, in this case, the axial direction of the pre-processing part side shaft half part 21b is not parallel to the link direction of the link arm 27 of the parallel link mechanism, and the pre-processing part side tip is displaced outward. This is a normal use state in which the pretreatment section 2 is displaced to the outside of the machine body, the transmission shaft 21 is bent outward from the link arm 27, and the pretreatment section 2 is moved to perform ridge work etc. This is because the amount of inward bending of the transmission shaft 21 when displaced inward of the fuselage is made smaller than the link arm 27, so that the bending angle of the universal joint 24.24a does not become excessive. .

On the other hand, the stem culm raking unit 4 is disposed on the stem culm input port side of the grain threshing unit 3, and forcibly supplies the lifted and conveyed stem culm to the grain threshing unit 3. The scraping body 51 constituting the culm scraping part 4 is configured to be able to be retracted upward for one-time use.

In other words, left and right side plates 43 are provided at the front of the stem culm input port, and a support shaft 44 is rotatably supported on this side plate 43 via a bearing 44a. A transmission gear 45 and a sprocket 46 are integrally fixed to the end. A chino 48 is wound around and interlocked between this sprocket 46 and a sprocket h47a fixed to a transmission shaft 47 which is freely rotatable on the outer plate 43. Note that 49 is a tension sprocket.

Further, an actuating cylinder shaft 50 provided so as to cover the transmission shaft 44 is freely rotatably supported by boss portions 43a formed on the left and right side plates 43, and is connected to the actuating cylinder shaft 50 via a support frame 52. A scraping body 51 is integrally attached thereto, so that the scraping body 51 can be oscillated between a lower scraping action position and an upper non-operation position using the axis of the operating cylinder shaft 50 as a fulcrum. It has become.

53 is an operating shaft for operating the scraping chino 51a of the scraping body 51;
The outer end of the operating shaft 53 projects outward through a long hole 43b formed in the side plate 43, and this projecting end A final gear 54 is integrally attached to the. On the other hand, the transmission gear 45 is always meshed with an intermediate gear 55, and the final gear 54 on the side of the scraping body 51 is selectively meshed with the intermediate gear 55. In other words, the final gear 54 meshes with the intermediate gear 55 when the scraper 51 is in the working position, but when it is in the non-working position, it moves upward and disengages from the intermediate gear 55. The gear clutch is thereby automatically disengaged. In addition, in this embodiment, the scraping body 51
A scraping body 56 is also disposed on the lower side so as to be opposed to, and this lower scraping body 56 is configured to constantly scrape.

Reference numeral 57 denotes a cover that covers the upper scraping body 51 from above, and the cover 57 is pivotally supported on the side plate 43 by a support shaft 57a so as to be able to swing vertically, while the cover 57 is supported on the operating cylinder shaft 50. The support frame 5 is approximately shaped like a mouth.
8 are integrally connected to each other, and an operating lever 59 is further protruded from this support frame 58.
A locking hook 60 is further integrally fixed to the base end of the operating lever 59. Further, 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.
1a, the tip is always urged toward the side where it engages with the locking hook 60. When the release pin 61 is engaged with the locking hook 60, the upward movement of the scraping body 51 to the non-working position together with the cover 57 is restricted. To set the release pin 61 to the locking hook 60, pull the release pin 61 against the bullet 61a to release the locking hook 60, and in this state, push the operating lever 5.
9 and lift it up, the scratching body 51 will be removed from the cover 57.
At the same time, the gear clutch is also displaced to the non-operating position, and the gear clutch is also disengaged as described above. Note that the support frame 58 is provided with a locking pin 58a, and this locking pin 58a connects to a guide hole 571 provided on the cover 57 side.
), and is configured to support opening and closing of the cover 57.

In the embodiment of the present invention configured as described above, the pre-processing section 2 is displaced left and right by the parallel link mechanism of the left and right link arms 27, so that the pre-processing section 2 is placed at an optimal position with respect to the ridge position. Harvesting work can be carried out by displacing the stalks, and the harvested stem culms are transported by lifting conveyors 37 on the tip side and the plant base side, which are arranged so as to expand to the left and right at the end of conveyance. .38, the grains are lifted up and conveyed, and then supplied to the threshing section 3 in a horizontally laid down position.

In this way, in the present invention, the stem culms cut in the pre-processing section 2 are lifted up and conveyed by the lifting conveyance bodies 37 and 38 without being laid down, and are supplied to the threshing section 3 side. The rocking fulcrums of the pre-processing section 2 and the stock side lifting carrier 38 are shifted back and forth, and the stocking stock side lifting carrier 37 is tilted toward the outside of the machine. For this reason, when the pre-processing section 2 is moved from side to side, the starting end of the single-plant-side lifting conveyor 37 will shift by B in the front-back direction.

On the other hand, the pre-processing section 2 is shifted by A in the front and back direction due to the swing of the parallel link mechanism whose swing angle is irregularly set so as to swing largely toward the tip side lifting conveyor 37''. , the back-and-forth shift B of the stock-side lifting conveyor 38 is approaching, and therefore, the swing angle of the parallel link mechanism is equally distributed to the left and right to prevent the pre-processing section 2 from moving back and forth. The amount of deviation between the transport start end of the base-side lifting and transporting body 38 and the pre-processing section becomes large, which may impede the receiving and transporting performance of the stock-side lifting and transporting body 38 for cut stem culms. It is possible to securely hold down the stem culm, ensure that the stem culm is received by the plant-side lifting and transporting body 38, and perform smooth lifting and transport.

Moreover, since the parallel link mechanism does not completely eliminate the distribution of power to the stock side lifting conveyor 38 side, the installation of the parallel link mechanism and the power transmission shaft 21 does not cause any strain on the arrangement, and there are structural issues. But it will be advantageous.

[Operations and Effects] In summary, since the present invention is constructed as described above, the pre-processing section is configured to be able to adjust the left and right movement using a parallel link mechanism that can simplify the structure. The culm can be adjusted to the left and right according to the ridge position, and the stem culm cut in the pre-processing section can be lifted up and transported without being laid down.
The lifting conveyors on the tip side and stock side are arranged so that they expand left and right at the end of conveyance, but when the pre-processing section moves left and right, In response to the back-and-forth deviation of the transport start end of the stock side lifting transport body that swings with reference to the swing fulcrum, the parallel link mechanism swings irregularly so that the swing end side is larger than the swing start side. In this way, the pre-processing section is caused to be displaced back and forth, and the amount of displacement approaches the amount of back-and-forth displacement of the lifting conveyor on the stock side,
Therefore, like the one in which the swinging motion of the parallel link mechanism is equally distributed to both sides to eliminate the front-to-back deviation of the pre-processing section, the transport start end of the single-stock source side lifting conveyance body and the pre-processing section are As a result, even if the pre-processing section moves from side to side, the single-plant-side lifting and transporting body picks up and stops the stem culm without making any mistakes in picking it up and lifting and transporting it smoothly. It will be possible. Moreover, the parallel link mechanism is set to swing slightly toward the stock side lifting carrier, so
As in the case where swinging to the side is completely eliminated, the installation of the parallel link mechanism and the power transmission shaft does not cause unreasonable arrangement and configuration, and is also advantageous from a structural point of view.

[Brief explanation of the drawing]

The drawings show an embodiment of the stem culm harvesting machine according to the present invention, in which Fig. 1 is a schematic side view of the stem culm harvesting machine, Fig. 2 is a plan view of the pretreatment section, Fig. 3, Figure 4 is an explanatory diagram of the operation of the parallel link mechanism showing the state in which the pre-processing section is moved left and right;
The figure is an action explanatory diagram showing the horizontal displacement state of the parallel link mechanism and the lifting conveyance body, Figure 6 is a mechanism explanatory diagram showing the horizontal displacement state of the same as above, and Figure 7 is a side view showing a part of the stem culm raking cover. FIG. 8 is a side view showing the clutch gear engagement state of the same part, FIG. 9 is a front view of the same part, and FIG. 10 is a developed sectional view of the same part. In the figure, 1 is a stem culm harvester, 2 is a pre-processing section, 3 is a threshing section, 2
7 is a link arm, 37 is a tip-side lifting conveyor, and 38 is a stock-side lifting conveyor. Figure 5 Figure 6

Claims (1)

[Claims] A pre-processing section equipped with a cutting blade for reaping stem culms, and lifting units for the tip side and stock side for lifting and conveying the stem culms cut in the pre-processing section and supplying them to the stem culm processing section. In the stem culm reaping machine equipped with a conveyor, the pretreatment section is connected to the machine body via a parallel link mechanism so as to be movable left and right, while each lifting conveyor on the ear tip side and the stock base side is They are arranged in a distributed manner to the left and right so that the conveyance terminal end side expands to the left and right, and each conveyance terminal end is pivoted toward the main body side so that it can freely swing left and right at a position rearward of the swinging shaft position of the parallel link mechanism. Along with supporting
The swinging of the parallel link mechanism is set in a distributed manner so that the angles at the start and end of the swinging are different so that longitudinal displacement occurs before and after the left-right movement, and the amount of longitudinal displacement based on the left-right movement of the pre-processing section is determined by this. A stem culm harvesting machine characterized in that the longitudinal displacement is close to that of a lifting conveyor on the plant base side that follows and oscillates.