JP2005237271A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester with which the capacity of a hydraulic oil tank is increased without widening a space between a pretreatment supporting part and a threshing part and stems and culms are excellently passed from a pretreatment part to the threshing part while securing the necessary capacity of the hydraulic oil tank. <P>SOLUTION: In the combine harvester 1 that is equipped with the pretreatment part 2 for reaping stems and culms and the threshing part 3 for threshing reaped stems and culms and the pretreatment supporting part 10 for freely liftably and lowerably supporting the pretreatment part 2 ahead the threshing par 3, when a pretreatment transmission case 39 doubling as the hydraulic oil tank is arranged ahead the threshing part 3, the front lower side of the pretreatment transmission case 39 is projected forward and fitted to enter the under side of the pretreatment supporting part 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a combine in which a hydraulic oil tank is disposed in front of a threshing portion.

There is known a combine in which a hydraulic oil tank for storing hydraulic oil (hydraulic device hydraulic oil) is disposed in front of the threshing portion. However, in the case where the hydraulic oil tank is arranged in front of the threshing part, it is necessary to widen the space between the pretreatment support part and the threshing part in order to secure the capacity of the hydraulic oil tank. There is a risk of hindering the handing over of the stems to the club. In recent years, therefore, it has been proposed to dispose a hydraulic oil tank in the space below the pretreatment support (see, for example, Patent Document 1).
JP 2000-92950 A

  According to the combine shown by patent document 1, it arrange | positions a hydraulic-oil tank in the downward space of a pre-processing support part, and narrows between a pre-processing support part and a threshing part, From a pre-processing part to a threshing part. However, since the height of the hydraulic oil tank is limited by the pretreatment support portion, a necessary tank capacity may not be ensured.

The present invention has been created for the purpose of solving these problems in view of the above circumstances, and includes a pre-processing unit that cuts off the stems and a threshing unit that threshs the cut stems. In addition, in a combine provided with a pretreatment support part that supports the pretreatment part so as to be movable up and down in front of the threshing part, a front lower part of the hydraulic oil tank is disposed in front of the threshing part. Is made to protrude forward and enter the lower part of the pretreatment support part. If it does in this way, it will become possible to increase the capacity | capacitance of a hydraulic-oil tank, without expanding the space | interval between a pre-processing support part and a threshing part. Thereby, while ensuring the required capacity | capacitance of a hydraulic-oil tank, the hand over of the stalk from a pre-processing part to a threshing part can be performed favorably.
In addition, the lower part of the rear side of the hydraulic oil tank protrudes rearward, and enters the lower side of the front plate of the threshing part. If it does in this way, the capacity | capacitance of a hydraulic oil tank can further be increased using the front side board lower space of a threshing part.
The hydraulic oil tank may further include a preprocessing transmission mechanism that transmits engine power to the preprocessing unit. In this case, not only can the number of parts be reduced and the structure can be simplified, but also the capacity of the hydraulic oil tank can be easily secured as compared with the case where the hydraulic oil tank and the pretreatment transmission case are configured separately.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a combine. The combine 1 includes a pre-processing unit 2 that cuts the stem pods, a threshing unit 3 that threshs the grains from the cut stalks, and selects the grains. A grain tank 4 for storing grains, a post-processing unit 5 for processing threshed waste, an operation unit 6 provided with various operation tools, and a crawler type traveling unit 7 are configured. Yes.

  The pre-processing unit 2 includes a divider 8 for weeding the uncut stem culm, an elevating device (not shown) for causing the weed stalk culm, and a cutting blade device for cutting the stock position of the stalk culm ( (Not shown) and a pretreatment conveying device 9 that conveys the mowing stalk toward the threshing portion 3, and is movable up and down by a pretreatment support portion 10 erected on the front of the body of the combine 1. It is supported.

  The pre-processing support unit 10 is a pair of left and right supporting a pre-processing support frame 12 having a front view-like shape standing on the left front end portion of the body frame 11 and a pre-processing support shaft 13 rotatably supported on the upper part. And a boss 14. The preprocessing support shaft 13 which is the rotation center of the preprocessing unit 2 is a hollow cylindrical shaft, and the preprocessing transmission cylinder 15 is integrally connected thereto. That is, when power is input from the preprocessing input pulley 16 provided at the right end of the preprocessing support shaft 13, the power is supplied to the preprocessing section 2 via the transmission mechanism built in the preprocessing support shaft 13 and the preprocessing transmission cylinder 15. Power is transmitted.

  The threshing unit 3 includes a handling chamber (not shown) in which the handling cylinder 17 is installed, a processing chamber (not shown) in which the processing cylinder 18 is installed, a sorting room for sorting threshed grains, and a handling room. The threshing feed chain 19 that conveys the stalks along the shed and the waste conveying device 20 that conveys the threshed waste toward the post-processing unit 5 are configured as a unit, and on the body frame 11 in the body assembly process Installed. The upper front part (front part of the handling room) of the threshing part 3 is covered with the front side plate 21, and the lower front part (front part of the sorting room) of the threshing part 3 is retracted backward (setback) from the front side plate 21. ).

  The sorting chamber is provided with a pressure fan 22 for raising the sorting wind, a swing sorting body 23 for swinging and sorting the grains, and a suction fan 24 for raising the dust exhaust. The power of the threshing unit 3 is input to the compressed air fan rotation shaft 25 and is transmitted from here to each unit of the threshing unit 3. That is, a pulley 27 for transmitting power to the swing sorter 23, the suction fan 24, and the cutter 26 is provided at the left end of the compressed air fan rotating shaft 25, and the right end of the compressed air fan rotating shaft 25 is handled at the right end. A pulley 28 for transmitting power to the cylinder 17, the processing cylinder 18 and the waste transporting device 20 is provided.

  The threshing feed chain 19 is fed along the left side surface of the threshing unit 3 so as to supply the tip side of the stem culm taken over from the pretreatment unit 2 into the handling chamber and to deliver the threshing that has been threshed to the scouring and conveying device 20. Arranged. The threshing feed chain 19 is suspended by a plurality of driven sprockets 29 and a single drive sprocket 30, and performs a conveying operation according to the rotation of the drive sprocket 30.

  An engine 31 that generates power for the preprocessing unit 2, the threshing unit 3, the traveling unit 7, and the threshing feed chain 19 is mounted below the operation unit 6. The power of the traveling unit 7 is input from the engine pulley 32 to the traveling continuously variable transmission (HST) 34 via the transmission belt 33 and further transmitted to the traveling unit 7 via the transmission case 35. The power of the pretreatment unit 2, the threshing unit 3 and the threshing feed chain 19 is input from the engine pulley 32 to the pretreatment transmission case (hydraulic oil tank) 39 via the transmission belt 36, the input pulley 37 and the input shaft 38. From here, it is transmitted to the pretreatment unit 2, the threshing unit 3 and the threshing feed chain 19 in a distributed manner. Reference numeral 40 denotes a belt tension type work machine clutch.

  The preprocessing transmission case 39 is disposed in front of the threshing unit 3 and inputs engine power from an input shaft 38 protruding from the right side surface, and this power is not transmitted by a preprocessing continuously variable transmission (HST) 41. It is configured so as to be step-shifted and supplied to the pretreatment unit 2 and the threshing feed chain 19. Thereby, the stalk conveyance speed of the pretreatment part 2 and the threshing feed chain 19 is synchronized, and conveyance disorder in the takeover part is prevented. The preprocessing continuously variable transmission 41 includes an HST pump (swash plate type variable displacement hydraulic pump) 42 and an HST motor (fixed displacement hydraulic motor) 43 that is driven by oil discharged from the HST pump 42. The engine power can be changed steplessly according to the operation of the swash plate of the HST pump 42. In the present embodiment, a swash plate control motor 44 is connected to the swash plate of the HST pump 42, and the swash plate operation is performed via the swash plate control motor 44.

  In addition to the input shaft 38, the preprocessing transmission case 39 includes an HST input shaft 45 that transmits power to the HST pump 42, an HST output shaft 46 that transmits power output from the HST motor 43, and the threshing feed chain 19. A feed chain output shaft 47 that outputs power, a preprocessing output shaft 48 that outputs power to the preprocessing unit 2, a plurality of transmission shafts 49 to 51 that relay power transmission between the shafts, and the like are provided.

  A threshing feed chain drive shaft 52 is connected to the feed chain output shaft 47. The threshing feed chain drive shaft 52 extends outward from the left side surface of the preprocessing transmission case 39, and the tip reaches the position of the threshing feed chain 19. The above-described drive sprocket 30 is provided at the tip of the threshing feed chain drive shaft 52, and the threshing feed chain 19 is conveyed and driven by suspending the threshing feed chain 19 here. On the other hand, the preprocessing output shaft 48 protrudes from the right side surface of the preprocessing transmission case 39, and the power is transmitted from here to the preprocessing input pulley 16 through the output pulley 53 and the transmission belt 54. Reference numeral 55 denotes a belt tension type mowing clutch.

  Further, in the pretreatment transmission case 39, the input shaft 38 protruding from the right side surface is extended leftward and leftward from the left side surface of the pretreatment transmission case 39 to be a threshing portion drive shaft 56, and an output pulley from the tip portion thereof. The threshing portion power is supplied to the pulley 27 of the compressed air fan rotating shaft 25 described above via the transmission belt 57 and the transmission belt 58. If comprised in this way, it will become possible to input the threshing part motive power from the left side part of the threshing part 3 using the pre-processing transmission case 39. This simplifies the transmission structure at the center of the fuselage compared to the conventional one that inputs the power of the threshing from the right side surface (machine center) of the threshing unit 3, thereby reducing the cost of the combine 1 and improving maintainability. Can be planned.

  In the present embodiment, when extending the threshing portion drive shaft 56 from the left side surface of the pretreatment transmission case 39, a cylindrical cover 59 that covers the threshing portion drive shaft 56 is integrally formed on the left side surface of the pretreatment transmission case 39. It protrudes to. The cover 59 is supported at the front end by the body frame 11 and rotatably supports the base end and the front end of the threshing portion drive shaft 56 via a pair of bearings 60. The cantilever support is eliminated, and the threshing section power can be stably supplied.

  In this embodiment, the left side surface of the preprocessing transmission case 39 is provided on the left side surface of the preprocessing transmission case 39 when the preprocessing continuously variable transmission 41, the threshing feed chain drive shaft 52, and the threshing portion drive shaft 56 are provided. A threshing feed chain drive shaft 52 protrudes from the upper portion, a threshing portion drive shaft 56 protrudes from the lower left side of the pretreatment transmission case 39, and further, the threshing feed chain drive shaft 52 and the threshing portion drive shaft 56 Between the two, a preprocessing continuously variable transmission 41 is disposed. As a result, the threshing feed chain drive shaft 52 and the threshing portion drive shaft 56 are separated from each other, and interference between both drive systems can be avoided. In addition, by arranging the preprocessing continuously variable transmission 41 between the drive shafts 52 and 56, it is possible to increase the efficiency of these arrangements and avoid an increase in size around the preprocessing transmission case 39.

  Next, the pretreatment transmission case 39 as a hydraulic oil tank will be described. The pretreatment transmission case 39 is also used as a hydraulic oil tank, and hydraulic oil that also serves as lubricating oil is stored therein. The hydraulic oil is supplied to the preprocessing continuously variable transmission 41 and, via the hydraulic pumps P1 and P2 provided in the transmission case 35, the traveling continuously variable transmission 34, the auger turning hydraulic motor 61 and the valve. It is supplied to the assembly 62. Connected to the valve assembly 62 are a plurality of steering hydraulic actuators A1 to A5, a pretreatment lifting hydraulic cylinder A6, an auger lifting hydraulic cylinder A7, a pair of machine body horizontal hydraulic cylinders A8 and A9, and the like. It is operated by hydraulic oil stored in the case 39. As described above, when the pretreatment transmission case 39 is also used as a hydraulic oil tank, it is possible not only to secure the tank capacity but also to reduce the number of parts and simplify the structure, compared to the case where a hydraulic oil tank is provided separately. become. Further, when the preprocessing transmission case 39 is a hydraulic oil tank, the preprocessing continuously variable transmission 41 is integrated, so that it is easy to supply hydraulic oil to the preprocessing continuously variable transmission 41 and process return oil. There is also an advantage.

  Next, the arrangement and shape of the preprocessing transmission case 39 will be described. The pretreatment transmission case 39 has a vertical rectangular parallelepiped shape, and is disposed between the pretreatment support part 10 and the threshing part 3. A front convex portion 39a that protrudes forward is formed at the front lower portion of the pretreatment transmission case 39, and the front convex portion 39a is formed in a space below the pretreatment support portion 10 that is formed in a square shape (inside space). ) According to such a configuration, it is possible to increase the tank capacity of the pretreatment transmission case 39 without widening the space between the pretreatment support part 10 and the threshing part 3, while ensuring the necessary tank capacity. In addition, it is possible to satisfactorily hand over the stems from the pretreatment unit 2 to the threshing unit 3.

  Moreover, in this embodiment, the rear side convex part 39b which protrudes back is formed also in the rear side lower part of the pre-processing transmission case 39, and this rear side convex part 39b is formed before the front upper part of the threshing part 3 is formed. A space below the side plate 21 is inserted. This makes it possible to further increase the tank capacity of the preprocessing transmission case 39 by using the space below the front side plate 21.

  The combine 1 according to the present embodiment configured as described includes a pretreatment unit 2 that cuts the stems and a threshing unit 3 that threshs the harvested stems and a pretreatment in front of the threshing unit 3. When the pretreatment support part 10 which supports the part 2 so as to be movable up and down is provided and the pretreatment transmission case 39 which also serves as a hydraulic oil tank is arranged in front of the threshing part 3, the pretreatment transmission case 39 is provided. Since the front lower part of the front part protrudes forward and enters the lower part of the pretreatment support part 10, the tank capacity of the pretreatment transmission case 39 is increased without widening the space between the pretreatment support part 10 and the threshing part 3. Is possible. Thereby, while ensuring the necessary tank capacity of the pretreatment transmission case 39, it is possible to satisfactorily take over the stalks from the pretreatment portion 2 to the threshing portion 3.

  Moreover, since the rear lower part of the pretreatment transmission case 39 protrudes rearward and enters the lower space of the front plate 21 that forms the front surface of the threshing part 3, the lower space of the front plate 21 is used to perform the pretreatment transmission. The tank capacity of the case 39 can be further increased.

  In addition, since the preprocessing transmission case 39 that transmits engine power to the preprocessing unit 2 is also used as the hydraulic oil tank, the number of parts can be reduced compared to the case where the hydraulic oil tank and the preprocessing transmission case 39 are configured separately. Not only can the structure be simplified, but the capacity of the hydraulic oil tank can be secured easily.

It is a left view which shows the combine of the state which removed covers and threshing feed chains. It is a transmission circuit diagram which shows the transmission structure of a combine. It is the perspective view which looked at the airframe front part of a combine from the right front. It is the perspective view which looked at the body front part of a combine from the left front. It is a disassembled perspective view of a pre-processing transmission case. It is a front view which shows the body front part of a combine. It is a right view which shows the body front part of a combine. It is a left view which shows the body front part of a combine. It is a hydraulic circuit diagram which shows the hydraulic structure of a combine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 2 Pre-processing part 3 Threshing part 10 Pre-processing support part 11 Airframe frame 12 Pre-processing support frame 13 Pre-processing support shaft 14 Boss 21 Front side plate 34 Traveling continuously variable transmission 35 Transmission case 39 Pre-processing transmission case (hydraulic oil tank)
39a Front convex portion 39b Rear convex portion 41 Pre-processing continuously variable transmission

Claims (3)

In the combine provided with the pretreatment part which cuts off the stem stalk and the threshing part which threshs the harvested stem stalk, and provided with the pretreatment support part which supports the pretreatment part up and down in front of the threshing part ,
In arranging the hydraulic oil tank in front of the threshing portion, the combine is characterized in that the lower part on the front side of the hydraulic oil tank protrudes forward and enters below the pretreatment support portion.   The combine according to claim 1, wherein a rear lower portion of the hydraulic oil tank protrudes rearward and enters a lower side of a front side plate of the threshing portion.   The combine according to claim 1 or 2, wherein a pre-processing transmission mechanism for transmitting engine power to the pre-processing unit is incorporated in the hydraulic oil tank.

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