JPH02283210A - Culm harvester - Google Patents

Abstract

PURPOSE:To prevent the fluctuation of a transfer path of a lifting and transferring member for lifting and transferring reaped culm by providing a pretreatment part displaceable in lateral direction with a parallel link mechanism and transmitting power to the pretreatment part through a specific transmission shaft. CONSTITUTION:A transmission shaft 21 for transmitting power to a pretreatment part 2 displaceable in lateral direction with a parallel link mechanism is divided into a machine-side shaft 21a and a pretreatment part-side shaft 21b. Both ends of the pretreatment part-side shaft 21b are made to correspond nearly to the positions of the supporting points of both sides in link direction of the parallel link mechanism and connected to the machine-side shaft and the pretreatment part-shaft 28 through flexible coupling mechanisms 24, 24a in freely bendable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a stem culm harvester for reaping 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, no consideration was given to the relationship between the longitudinal swing fulcrum of the parallel link mechanism and the swing fulcrum of the lifting carrier for transmitting power to the preprocessing section, so the preprocessing section was In order to respond to changes in the posture of the swinging conveyor that follows the movement of the swinging conveyor, two types of transport bodies are required: one fixed to the preprocessing section side and the other to the body side, and one whose both ends are swingably connected to these. As a result, the structure becomes complicated, and the lifting and conveying path of the stem culm changes greatly due to the movement of the pre-processing section, making it difficult to connect the stem culm smoothly. There is a problem in that new drawbacks such as

On the other hand, the latter type uses a helical spline shaft, so there is no such problem, but this type requires a long helical spline shaft in the left and right direction to be placed at the lower end of the transmission shaft, close to the field. be. As a result, a bellows-shaped cover member is required separately to cover the helical spline shaft, and since this cover is close to the field, it is not easy for mud to adhere to it, and stem culms are likely to get entangled. Furthermore, there is a problem that uncut stem culms and stubbles come into contact with each other and cause premature damage.

[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. The transmission shaft for transmitting power from the machine body side to the input shaft of the preprocessing section equipped with a cutting blade for use is divided into the machine side and the preprocessing side, and the shaft half is divided into the machine body side shaft half and the shaft half. A covering case tube is supported on the aircraft main body side so as to be able to swing vertically, while a bracket provided at the tip of the case tube and the preprocessing section are connected via a parallel link mechanism so as to be movable left and right, and Both ends of the preprocessing unit side shaft half are connected to the machine side shaft half and the preprocessing unit side input shaft via a universal joint mechanism at positions approximately corresponding to the fulcrum positions on both sides of the parallel link mechanism in the link direction. It is characterized by being connected.

With this configuration, the present invention is capable of ideally transmitting power to the pre-processing section even though the pre-processing section is displaced laterally by the parallel link mechanism.

[Example] Next, an embodiment of the present invention will be explained based on the drawings. In the drawing, 1 is a stem culm harvester, and the stem culm harvester 1
These are a pre-processing section 2, which will be described later, a shedding section 3 for shedding the harvested stalk culms, a stalk culm scraping section 4 for forcibly feeding the stalk culms to the shedding section 3, and a sorting process for the threshed grains. Sorting section 5. The construction of the crawler-type traveling bag W6 and other member devices is the same as in the past.

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 1o housed in the case 9 and the outer end of the transmission shaft 7 connect to the bevel gear mechanism 11. are interlocked and connected.

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 power 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 driving a lifting conveyor, which will be described later. The second output shaft 21 is interlocked with the second output shaft 21 for immediately moving the cutting blade 23 and the like. This second output shaft 21 includes a body-side shaft half 21a provided with the bevel gear mechanism 20, and a front shaft half 21a provided with a universal joint (corresponding to the universal joint mechanism of the present invention) 24.24a at both ends. It is divided into two parts, a processing part side shaft half part 21b, and both shaft half parts 21a and 21b are connected to a universal joint 24.
1 fuselage side shaft half 2
A bracket 25a is attached to the tip of the case tube 25 that covers 1a.
are integrally installed. And this bracket 2
5a and the machine frame 1a, a telescopic cylinder 26 that constitutes the elevating mechanism of the pre-processing section 2 is interposed, and the elongation and contraction of the telescopic cylinder 26 allows the pre-processing section 2 to be raised and lowered, including cutting height adjustment. It is configured to do so.

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 And these support shafts 27a.

The position of 27b is the position where the universal joint 24 is provided, and the position of the universal joint [24a] for interlockingly connecting the preprocessing part side shaft half part 21b and the input shaft 28 incorporated in the preprocessing part frame 2a. The pre-processing section 2 is arranged so as to substantially coincide with the link direction (front-rear direction), so that the pre-processing section 2 is configured to be able to move left and right.

The power input to the input shaft 28 is transmitted via the transmission shaft 29 and the worm gear mechanism 3o to the tip side and stock side stem 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 in movement in the axial direction, and furthermore, a bottle 34a is protruded from the outer end. ,
Further, a connecting plate 3eb having an elongated hole 36a is provided at the tip of the handle 36 bent into a crank shape, and the bottle 34a is loosely fitted into the elongated hole 36a. When the handle 36 is guided by the elongated hole 36a and pushed inward, the handle 36 is inserted into the narrow diameter portion 34 provided at the outer end of the operating rod 34.
A mating hole 36d drilled at the tip of the handle is fitted into b, thereby integrating the handle 36 and the operating rod 34, and the rotation of the operating rod 34 following the rotation of the handle 36 causes the operation to be performed. The rod 34 moves in the left-right direction with respect to the support fitting 26a to swing the link arm 27, so that the pre-processing section 2 can be displaced from side to side. In addition, there are left and right lock nuts 34 on the operating rod 34.
c 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, numeral 37 is a tip-side lifting conveyor, and 38 is a stock-side lifting conveyor, and these conveyors 37 and 38 are.

The conveyance start end side overlaps vertically, and the conveyance end side is arranged in a posture that expands left and right to lift and convey the stem culm in a lodging shape. An arm 38 is attached to a cover cylinder 39 that covers the first output shaft 19.
On the other hand, a support shaft 37c of a sprocket on the conveyance end side of the tip side lifting conveyor 37 is pivotally supported on the body side so as to be freely swingable. Furthermore, the tip side lifting conveyance body 37 is interlocked and connected to the first output shaft 19 via a chain transmission mechanism 40, and is configured using a conveyance chino with claws 37b wrapped in a conveyance case,
In addition, in the plant side lifting conveyance body 38, the conveyance cheno 38b is directly engaged with a sprocket provided on the first output shaft 19, and as the first output shaft 19 rotates, the stem culm is lifted and conveyed. However, the axis 38d of the lower end sprocket 38c of the stock side lifting conveyor 38 is connected to the preprocessing section 2 side via a swing link 40. 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 both lifting conveyance bodies 37 and 38 The starting end side also follows the preprocessing section 2 and moves to the left and right. 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 stock side lifting transport body 37 that swings around the shaft 37c
The amount of deviation in the longitudinal direction is C, but the swing range of the link arm 27 is selected so that these amounts of deviation approximate, and in particular, in the embodiment, the amount of deviation has a relationship of B>A>C. Therefore, it is set so that the longitudinal deviations of the tip side and stock side lifting conveyance bodies 37, 38 are averaged with respect to the longitudinal deviation of the pre-processing section 2.

Furthermore, in this case, the positional relationship between the transport start end sides of both lifting transport bodies 37 and 38, that is, the axis of the transport start end side sprocket, is only D when the preprocessing section is displaced to the right as shown in No. 6 @. 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 front end of the pre-processing part side 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 culm raking body 51 constituting the culm raking unit 4 is configured to be able to be retracted upward for use in cutting corners 6 In other words, left and right side plates 43 are provided at the front of the culm input opening. This side plate 43 has a support shaft 44
is rotatably supported via a bearing 44a, and a transmission gear 45 and a sprocket 46 are integrally fixed to the outer end of the support shaft 44. And this sprocket 4
A chino 48 is wound between the sprocket 6 and a sprocket 47a fixed to a transmission shaft 47 which is freely rotatable on the outer plate 43 and is interlocked with the sprocket 47a. 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 protrudes outward through a long hole 43b formed in the side plate 43, and this protruding end A final gear 54 is integrally attached to the. On the other hand, the transmission gear 45 is always in mesh with an intermediate gear 55, and the final gear 54 on the side of the scraper S1 is selectively engaged 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. Note that 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 vertically swingable.

A base end portion of a support frame 58 having a substantially mouth shape is integrally connected to the actuation cylinder shaft 50 to support the cover 57, and the support frame 58 further includes an operation lever 59.
A locking hook 6o 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.
It is biased toward the side that engages with zero. When the release pin 61 is engaged with the locking hook 6o, the cover 5
7, the upward movement of the scraping body 51 to the non-working position is restricted, but in order to set the scraping body 51 to the non-working position from this state, the release bottle 61 must be moved against the bomb 61a. If the engagement with the locking hook 60 is released by pulling, and the operating lever 59 is grasped and lifted in this state, the scraping body 51 is displaced to the non-operating position together with the cover 57, and the gear clutch is also disengaged as described above. It is configured to be in a disconnected state. The support frame 58 is provided with a locking pin 58a, and the locking pin 58a is loosely fitted into a guide hole 57b provided on the cover 57 side to support opening and closing of the cover 57. There is.

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 parallel link v! In this structure, the transmission shaft 21 for transmitting power from the fuselage side to the preprocessing part 2 is divided into two parts, and both ends of the preprocessing side shaft half part 21b are roughly called both side support shafts in the link direction of the parallel link mechanism. They are respectively connected to the machine body side shaft half 21a and the preprocessing section side input shaft 28 via universal joints 24.24a at matching positions. Therefore, when the preprocessing section 2 is moved left and right using the parallel link mechanism, the body side shaft half 21a remains unchanged, and only the preprocessing section side shaft half 21b follows the swinging displacement of the parallel link mechanism. universal joint 24.2
Power is transmitted in a bent state based on 4a.

Therefore, although a parallel link mechanism is used, the connection structure of the transmission shaft 21 on the fuselage side can be a general-purpose one without any structure, similar to a fixed type in which the front processing section does not move left or right. The operation rod 3, which is a member for moving the preprocessing section 2 from side to side, can be used without complicating the process.
4 can also be placed in a high place away from the field, and problems such as mud adhesion and stem culms getting entangled can be reliably prevented.

[Operations and Effects] In summary, since the present invention is constructed as described above, the front processing section is configured to be adjustable in horizontal movement using a parallel link mechanism that can simplify the structure. Although the processing section can be adjusted to the left and right according to the ridge position, the transmission shaft for transmitting power to the preprocessing section is divided, and both ends of the preprocessing section side shaft half are connected to the parallel link mechanism. It is made to correspond approximately to the fulcrum positions on both sides in the link direction, and is bendably connected to the machine body side shaft half and the preprocessing part side input shaft via a universal joint mechanism, so that the preprocessing part can be operated by the parallel link mechanism. When moving from side to side, the power transmission shaft transmits power to the preprocessing section side with the preprocessing section side shaft half bent and displaced in response to the swinging displacement of the parallel link mechanism. As a result, the fuselage-side shaft half of the power transmission shaft only needs to be connected to the fuselage side by adopting the same simple and general-purpose connection structure as the fixed type, in which the preprocessing part does not move from side to side. There is no problem that would affect the conveyance route of the lifting conveyor that lifts and conveys the stem culm.

Furthermore, the left and right movement of the pre-processing section can be achieved by performing the left and right swinging movement of the parallel link mechanism, and the actuating member for this purpose is independent of the lower end position of the transmission shaft, as in the case of conventional helical spline shafts. It can be installed higher than that and has a high ground clearance, so it can effectively avoid problems such as mud adhering to these members or stem culms getting entangled, and is highly reliable over a long period of time. It's going to be a bit of a bit of a bit of a bit of a bit of a bit of a bit of a bit of a bit of a bit of.

[Brief explanation of drawings]

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 pretreatment section, 21 is a transmission shaft,
21a is the machine body side shaft half, 21b is the preprocessing section side shaft half, 2
4 and 24a are universal joints, 25 is a case cylinder, 25a is a bracket, and 28 is an input shaft. Patent applicant: Mitsubishi Agricultural Machinery Co., Ltd. Figure 6

Claims (1)

[Claims] The transmission shaft for transmitting power from the machine body side to the input shaft of the preprocessing section equipped with a cutting blade for cutting stem culms is divided into the machine side and the preprocessing side, and the transmission shaft is divided into the machine side and the preprocessing side. The case tube that covers the half part is supported on the main body side so that it can freely swing up and down, while the bracket provided at the tip of the case tube and the preprocessing section are connected via a parallel link mechanism so that it can move left and right. and connect both ends of the preprocessing section side shaft half to the machine side shaft half and the preprocessing section side input shaft via a universal joint mechanism at positions approximately corresponding to the fulcrum positions on both sides of the parallel link mechanism in the link direction. A stalk and culm harvesting machine characterized by being connected to each other.