JP2007028980A - Structure for transporting grain culm of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To always feed reaped grain culms in a posture suitable for threshing to a feed chain in a structure for transporting the grain culms of a combine harvester composed so as to transport the grain culms raised up with a raising up apparatus and reaped with a feeding and transporting apparatus and deliver the grain culms in a lateral fallen posture to the feed chain of a threshing apparatus and composed so as to synchronously drive the raising up apparatus and the feeding and transporting apparatus at a speed in proportion to traveling speed. <P>SOLUTION: The structure for transporting the grain culms of the combine harvester is equipped with the feeding and transporting apparatus 20 composed of an ear tip engaging and transporting mechanism 21 and a plant foot nipping and transporting mechanism 22. Furthermore, the structure is provided with a transmission mechanism 32 for changing the transportation speed ratio of the ear tip engaging and transporting mechanism 21 to the plant foot nipping and transporting mechanism 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cereal conveying structure used for a self-removing combine.

The self-decomposing combine cereal conveyance structure is configured to convey the cereal that has been raised and harvested by the pulling device by the supply conveying device, and deliver it to the feed chain of the threshing device in a sideways posture. In many cases, the reaping portion is configured to be driven synchronously at a speed proportional to the traveling speed, and as disclosed in Patent Document 1, the characteristics of the speed change of the reaping portion with respect to the change in the traveling speed are expressed. Some are configured to be selectable.
JP 2004-65015 A

  According to the structure of Patent Document 1, at the time of harvesting a low-speed traveling cereal, it switches to a lodging mode that drives the cutting part at a high speed, thereby pulling out the lying cereal and causing it smoothly without being forced. Can be harvested and transported, and is practically useful. However, since the entire supply and transport device is driven in a synchronized manner with the traveling speed, the transport speed ratio between the tip locking transport mechanism and the stock holding and transport mechanism constituting the supply and transport device is always constant, In general, a configuration is adopted in which the tip locking and transporting mechanism and the stock holding and transporting mechanism are driven at substantially the same speed to transport the cereals backward in a fixed posture.

  However, in the case of the follow-up mowing that harvests the fallen cedar from which the tip has fallen forward greatly, the cereal that has been raised and cut easily tends to be delayed in the tip direction with respect to the transport direction due to the fallen heel. It is conveyed by the supply conveyance device and delivered to the start end of the feed chain. When the cedar is sent to the handling room in a delayed position, the initial squeezing action by the tooth treatment on the cereal stock side will work strongly, and the cereal may be broken or part of the cereal Is likely to be pulled out of the feed chain, causing a decrease in threshing ability, an increase in discharged grains (grain loss), and the like.

  The present invention has been made paying attention to such points, and it is an object of the present invention to provide a culm transporting structure capable of always supplying a chopped culm to a feed chain in a posture suitable for threshing. It is said.

According to a first aspect of the present invention, the cereal grains that have been raised and harvested by the pulling device are transported by the feeding and transporting device and delivered to the feed chain of the threshing device in a sideways posture. In the combine cereal conveying structure configured to drive the conveying device synchronously at a speed proportional to the traveling speed,
The supply and transport device includes a tip locking transport mechanism and a stock holding mechanism, and a speed change mechanism that changes a transport speed ratio between the head locking transport mechanism and the stock holding transport mechanism. And

  According to the above configuration, when the cereal is transported with a delay in the tip by the supply transport device, the speed change mechanism is shifted so that the transport speed of the tip locking transport mechanism is greater than the transport speed of the stock holding and transport mechanism. By doing so, cereals can be delivered to the feed chain in a state where the head delay has been corrected. In addition, when the cereal is transported at the tip of the tip by the supply transport device, the speed change mechanism is shifted so that the transport speed of the tip locking transport mechanism is smaller than the transport speed of the stock holding and transport mechanism. The cereals can be delivered to the feed chain with the leading edge corrected.

  Therefore, according to the first invention, even if the culm is delayed in head or leading by the harvesting condition, it is possible to correct the culm posture suitable for threshing and transfer it to the feed chain during transport by the supply transport device. It is possible to perform good threshing without cutting or pulling out the ears.

According to a second invention, in the first invention,
The speed change mechanism is interposed in a transmission system to the tip locking transport mechanism so that the transport speed of the tip locking transport mechanism can be changed with respect to the transport speed of the stock holding and transport mechanism.

  According to the above configuration, the stock holding and transporting mechanism operates at a transport speed synchronized with the traveling speed, so that the tip of the culm is not excessively increased, the transport load is increased, and transport clogging does not occur. It is possible to correct the posture of the culm by changing the conveying speed of the locking conveying device.

According to a third invention, in the first or second invention,
In the low-speed travel area, the transmission gear ratio is set so that the transport speed of the tip locking transport mechanism is higher than the transport speed of the stock transport apparatus, and in the high-speed travel area, the speed change mechanism is decelerated. As described above, shift control means for automatically shifting the shift mechanism in accordance with the traveling speed is provided.

  According to the above configuration, in harvesting the fallen cereal, the tip is likely to be delayed during the transportation of the cereal, and the traveling speed is reduced when the fallen cereal is harvested. This eliminates the need for shifting the speed change mechanism of the tip locking conveyance mechanism, allows the user to concentrate on maneuvering the aircraft, and is effective in improving work efficiency.

4th invention is the said 2nd or 3rd invention,
The tip locking conveyance mechanism is constituted by a front conveyance mechanism and a rear conveyance mechanism, and the front conveyance mechanism is driven at the same speed as the stock holding and conveyance mechanism, and the speed change is performed in the transmission system to the rear conveyance mechanism. The mechanism is interposed.

  According to the above configuration, in the multi-row mowing specification in which a plurality of stalks that have been raised and cut are joined and delivered to the supply and transport device, when the stalk is received by the supply and transport device, The transfer speed can be received smoothly with the transfer speed of the front transfer mechanism in the tip locking transfer mechanism being substantially the same, and the transfer speed of the rear transfer mechanism in the tip lock transfer mechanism is changed in the subsequent transfer. This makes it possible to correct the posture of the cereal and is effective in facilitating the transportation of the cereal.

5th invention is the invention of any one of said 1st-4th,
The transmission mechanism is constituted by a continuously variable transmission.

  According to the said structure, the conveyance speed of a tip latching conveyance mechanism can be adjusted finely, and a grain straw posture can be corrected finely.

  FIG. 1 shows a side view of the front portion of the self-removing combine, and FIG. 2 shows a plan view thereof. This combine is connected to a front part of a traveling machine body 2 provided with a pair of left and right crawler traveling devices 1 so as to be able to move up and down with a six-cut mowing specification, and to the traveling machine body 2, a driving unit 4, a threshing device 5, And the grain collection tank 6 etc. are mounted.

  The mowing part 3 is provided with a mowing part frame 10 that also serves as a transmission case. The rear end base part of the mowing part frame 10 is laterally mounted on the upper part of the support base 11 erected at the front end part of the traveling machine body 2. The fulcrum P is connected and supported so as to be able to swing up and down, and is driven to swing up and down by the hydraulic cylinder 12. The mowing unit frame 10 has six pulling devices 13 for raising the planted culm in a predetermined cutting posture, a clipper type mowing device 14 for cutting the raised planting culm, and the harvested culm behind Auxiliary conveyor belt 15 that is lightly scraped into the roll, a rotary packer 16 that scrapes and conveys the stock of the cereals in the rear, and three sets of merging and conveying devices 17 that transport and merge the cereals to the intermediate part within the cutting width. , 18, 19, and the supply and transport device 20 that transports the merged cereal to the start end of the feed chain 7 provided on the lateral outer side of the threshing device 5.

  The merging / conveying device 17 on the left side of the machine body is composed of a stock transporting mechanism 17a for nipping and transporting the stock of the left two cereals and a tip transporting mechanism 17b for locking and transporting the head, and the merging transport in the center portion. The apparatus 18 includes a stock transport mechanism 18a and a tip transport mechanism 18b for two middle strips, and the merging transport device 19 on the right side includes a stock transport mechanism 19a and a tip transport mechanism 19b for the right two strips. It consists of and. The auxiliary transport belt 15 and the rotary packer 16 are provided at the front ends of the stock transport mechanisms 17a, 18a, and 19a, respectively, and the rotary packers 16 that are erected in units of two lines are meshed with each other.

  The supply / conveyance device 20 extends rearward from the confluence of the tip locking engagement mechanism 21 extending from the vicinity of the right two merging points to the front of the feed chain 7 and the merging / conveying devices 17, 18, 19. The stock holding and transporting mechanism 22 and the horizontal turning type relay transporting mechanism 23 arranged in front of the feed chain 7 are used to stand the cereals joined by the merging and transporting devices 17, 18, and 19. The cereals are received in a posture, changed to a laterally tilted posture while being conveyed rearward and upward, and delivered to the starting end of the feed chain 7 in a laterally tilted posture.

  Here, the stock holding and transporting mechanism 22 swings up and down around the front fulcrum and changes the transport end position in the cocoon length direction, thereby changing the cereal delivery position to the feed chain 7 in the cocoon length direction. A handling depth adjustment function for changing and adjusting the culm insertion length into the threshing device 5 is provided.

An outline of the transmission structure of the cutting unit 3 configured as described above is shown in FIG.
The power from the engine 25 disposed under the seat in the driving unit 4 is branched into two systems, and one of the branch powers is transmitted to a hydrostatic continuously variable transmission (HST) 26 as a main transmission for traveling. Then, the transmission power is gear-shifted by the transmission case 27 and transmitted to the left and right crawler traveling devices 1. The hydrostatic continuously variable transmission 26 is mechanically linked to a main transmission lever 28 provided in the operation unit 4, and operates at a forward speed or a backward movement from the neutral position by moving the main transmission lever 28 forward or backward. It is possible to perform a continuously variable transmission. Further, the other branching power of the engine power is transmitted to the threshing device 5 as a belt, and the feed chain 7 and the threshing and sorting operating mechanisms are driven.

  A part of the shift output from the hydrostatic continuously variable transmission 26 is branched and transmitted to a PTO shaft 29 provided in a mission case 27, and only the forward rotation power of the rotation power of the PTO shaft 29 is a one-way clutch. It is taken out via 30 and transmitted to the cutting unit 3.

  A counter shaft 31 is horizontally mounted on the base end portion of the cutting frame 10 in the cutting portion 3 so as to be concentric with the fulcrum P of the cutting portion 3, and the normal rotation power from the PTO shaft 29 is applied to the counter shaft 31. Belt transmitted. Part of the power transmitted to the counter shaft 31 is transmitted to the front part of the cutting part through the inside of the cutting frame 10, and the pulling device 13, the cutting device 14, the auxiliary transport belt 15, the rotary packer 16, and the merging transport device 17. , 18, 19 and the stock holding and transporting mechanism 22 of the supply transporting device 20 are driven. Further, a part of the power transmitted to the counter shaft 31 is extracted upward from the shaft end portion, and the tip locking transport mechanism 21 and the relay transport mechanism 23 of the supply transport device 20 are driven.

  Accordingly, during forward traveling in the harvesting operation, as the hydrostatic continuously variable transmission 26 is operated to increase the speed, the output from the PTO shaft 29 increases in direct proportion, and each part of the cutting unit 3 synchronizes with the traveling speed. Driven at speed.

  The above basic structure is not different from the conventional structure, and the following structure is further added in the present invention.

  That is, as shown in FIG. 3, the speed change mechanism 32 is interposed in the transmission system to the tip locking conveyance mechanism 21 in the supply conveyance device 20. This speed change mechanism 32 uses a belt-type continuously variable speed change mechanism that changes the pulley effective diameter to change the winding transmission ratio, and the transport speed Va of the tip locking transport mechanism 21 is synchronized with the travel speed Vs. It is possible to continuously change the transport speed Va of the tip locking transport mechanism 21 with respect to the transport speed Vb of the stock holding and transporting device 22.

  Further, the speed change mechanism 32 is configured to perform a speed change operation by an actuator 33 such as a servo motor, and is set in advance based on detection information from a speed change position detection sensor 34 that detects an operation position of the main speed change lever 28. With the improved characteristics, the speed change is controlled as follows.

  FIG. 4 shows the relationship between the transport speed Vb of the stock holding and transporting device 22 and the transport speed Va of the tip locking mechanism 21 with respect to the travel speed Vs. In other words, in the region where the traveling speed Vs is lower than the predetermined speed V1, the transport speed Va of the tip locking transport mechanism 21 is higher than the transport speed Vb of the stock holding and transporting device 22, and in the region higher than the predetermined speed V1, the tip. The speed change mechanism 31 is set to be decelerated as the traveling speed Vs increases so that the transport speed Va of the locking transport mechanism 21 is smaller than the transport speed Vb of the stock holding and transporting device 22. Yes.

  According to this configuration, the harvested cereal is harvested at a low speed, so that the feed transport is performed in a state where the transport speed Va of the tip locking transport mechanism 21 is higher than the transport speed Vb of the stock holding and transporting mechanism 22. The apparatus 20 is driven, and the cereal that has started to be conveyed by the supply and conveyance device 20 due to the delay in the tip is corrected for the delay in the tip and is delivered to the feed chain 7 in a posture suitable for threshing.

  Further, when harvesting cereals in a standing posture, the traveling speed is increased in order to improve the work efficiency. However, as the traveling speed Vs increases, the speed change mechanism 32 is controlled to be decelerated, and the tip locking conveyance is performed. An excessive increase in the transport speed Va of the mechanism 21 is suppressed.

  Furthermore, when the traveling speed Vs is a high region, when the harvested cereals are merged and delivered to the supply and transport device 20, the stock holder that is nipped and transported is transported at a predetermined speed, but is flexible. The tip side transported in the locked state tends to precede the stock base due to the inertia associated with the fast transport, but the transport speed Va of the stock tip locking transport mechanism 21 is smaller than the transport speed Vb of the stock clamp holding transport mechanism 22. Since the speed change mechanism 32 is further subjected to deceleration control, the leading edge leading is corrected during the conveyance by the supply conveyance device 20.

[Other Examples]
(1) As shown in FIG. 5, a hydrostatic continuously variable transmission mechanism can be used for the transmission mechanism 31 that changes the conveyance speed Va of the tip locking conveyance mechanism 21.

  (2) As shown in FIG. 6, a gear-type multi-stage transmission mechanism can be used for the transmission mechanism that changes the conveyance speed Va of the tip locking conveyance mechanism 21.

  (3) As shown in FIG. 7, the tip locking and conveying mechanism 21 includes a front conveying mechanism 21 f and a rear conveying mechanism 21 r, and the front conveying mechanism 21 f is substantially the same speed as the stock holding and conveying mechanism 22. And the transmission mechanism 32r is interposed in the transmission system to the rear transport mechanism 21r. In this case, a belt-type continuously variable transmission mechanism, a hydrostatic continuously variable transmission mechanism (see FIG. 8), a gear-type multi-stage transmission mechanism, or the like can be arbitrarily selected as the transmission mechanism 32.

  (4) As shown in FIG. 9, the entire feeding / conveying device 20 including the tip locking / conveying mechanism 21 and the stock holding / carrying mechanism 22 is swung up and down around the fulcrum P of the cutting unit 3 to adjust the handling depth. In the specification for performing the transmission, the speed change mechanism 32 is interposed only in the transmission system of the stock holding and conveying mechanism 22, and as shown in FIG. 10, the conveying speed Va of the tip locking conveying mechanism 21 is directly proportional to the traveling speed Vs. In contrast to the change, the conveyance speed Vb of the stock holding mechanism 22 can be changed corresponding to the traveling speed Vs.

Combine side view Top view of the cutting part Transmission system diagram Characteristic diagram showing the relationship between travel speed and transport speed Schematic showing the drive structure of the tip locking transport mechanism Schematic showing another embodiment of the drive structure of the tip locking conveyance mechanism Schematic which shows another Example of the drive structure of a tip latching conveyance mechanism. Schematic which shows the other Example of the drive structure of a tip latching conveyance mechanism. Schematic configuration diagram in another embodiment Characteristic diagram showing the relationship between travel speed and transport speed in another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Threshing apparatus 7 Feed chain 13 Pulling-up apparatus 20 Supply conveyance apparatus 21 Ear | tip locking conveyance mechanism 21f Front conveyance mechanism 21r Rear conveyance mechanism 22 Stock-source clamping conveyance mechanism 32 Transmission mechanism

Claims (5)

The cereal grains that have been raised and harvested by the pulling device are transported by the feeding and transporting device, and are transferred to the feed chain of the threshing device in a sideways posture. In the combine grain transporting structure configured to be driven synchronously at a proportional speed,
The supply and transport device includes a tip locking transport mechanism and a stock holding mechanism, and a speed change mechanism that changes a transport speed ratio between the head locking transport mechanism and the stock holding transport mechanism. Combine grain transport structure.   2. The speed change mechanism is interposed in a transmission system to the tip locking mechanism, so that the transport speed of the tip locking transport mechanism can be changed with respect to the transport speed of the stock holding and transport mechanism. Combine grain transport structure.   In the low-speed travel area, the transmission gear ratio is set so that the transport speed of the tip locking transport mechanism is higher than the transport speed of the stock transport apparatus, and in the high-speed travel area, the speed change mechanism is decelerated. 3. The combine grain transporting structure according to claim 1, further comprising a shift control means for automatically shifting the speed change mechanism in accordance with a traveling speed.   The tip locking conveyance mechanism is constituted by a front conveyance mechanism and a rear conveyance mechanism, and the front conveyance mechanism is driven at substantially the same speed as the stock holding and conveyance mechanism, and the transmission system to the rear conveyance mechanism is The combine cereal conveying structure according to claim 2 or 3, wherein a speed change mechanism is interposed.   The combine grain transporting structure according to any one of claims 1 to 4, wherein the speed change mechanism is configured by a continuously variable transmission.

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