JP2005237272A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the transmission structure of a machine body inside and to improve maintenance of a combine harvester. <P>SOLUTION: The combine harvester 1 is equipped with a pretreatment part 2 for reaping stems and culms, a threshing feed chain 19 for conveying reaped stems and culms along a threshing part 3 and a pretreatment transmission case 39 for shifting and transmitting engine power inputted from an input shaft 38 to the pretreatment part 2 and the threshing feed chain 19 by speed change. The input shaft 38 projected to one side of the pretreatment transmission case 39 is extended from the other side surface of the pretreatment transmission case 39 and works as the driving shaft 56 of the threshing part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a combine equipped with a preprocessing transmission case that shifts engine power and transmits it to a preprocessing unit and a threshing food chain.

A combine equipped with a preprocessing transmission case that shifts engine power and transmits it to a preprocessing unit and a threshing food chain is known. This type of combine can synchronize the stalk-and-feed speed of the pretreatment unit and the threshing feed chain, so that the culm can be successfully transferred from the pretreatment unit to the threshing feed chain (for example, Patent Documents). 1).
JP 2002-305942 A

However, in the conventional combine configured as described above, the transmission path from the engine to the pre-processing transmission case and the transmission path from the engine to the threshing unit are configured independently, so the transmission structure inside the fuselage There is a problem that becomes complicated.
Moreover, in the conventional combine, since the hydraulic oil tank is configured independently and disposed in the front space of the threshing section, it is difficult not only to secure the necessary tank capacity but also to increase the cost. Was.

The present invention was created for the purpose of solving these problems in view of the above circumstances, and is a threshing that carries a pretreatment unit that cuts off the stems and the cut stems along the threshing unit. In a combine including a feed chain and a pre-processing transmission case that shifts engine power input from an input shaft and transmits the power to the pre-processing unit and the threshing feed chain, the combine is provided on one side of the pre-processing transmission case. The input shaft extends from the other side of the preprocessing transmission case to the other side to serve as a threshing portion drive shaft. In this way, since power can be supplied to the threshing unit using the pretreatment transmission case, the transmission path to the pretreatment transmission case and the transmission path to the threshing portion are configured separately. The transmission structure inside the fuselage can be simplified compared to the above. Thereby, not only the cost of the combine can be reduced, but also the maintainability can be improved.
In addition, a threshing feed chain drive shaft projects from the other side upper part of the pretreatment transmission case, and the threshing part drive shaft projects from the other side lower part of the pretreatment transmission case. A hydraulic continuously variable transmission for shifting engine power is disposed between the chain drive shaft and the threshing portion drive shaft. If it does in this way, a threshing feed chain drive shaft and a threshing part drive shaft will separate, and interference of both drive systems can be avoided. In addition, by disposing the hydraulic continuously variable transmission between the two drive shafts, it is possible to increase the disposition efficiency and avoid an increase in the size of the preprocessing transmission case.
The pretreatment transmission case is also used as a hydraulic oil tank. In this way, it is possible not only to secure the tank capacity but also to reduce the cost by reducing the number of parts as compared with the case where a hydraulic oil tank is provided separately. Further, there is an advantage that the supply of hydraulic oil to the hydraulic continuously variable transmission and the processing of return oil can be simplified.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawing, 1 is a combine, and the combine 1 includes a pre-processing unit 2 for cutting stem stalks, a threshing unit 3 for threshing grains from the cutting stalks and sorting the grains, and already sorted 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 unit 3, and is movable up and down by a pretreatment support unit 10 erected on the front part 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 that transmits 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 portion from the right side surface (the center of the machine) of the threshing part 3, thereby reducing the cost of the combine 1 and improving the 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 projects from the lower left side of the pretreatment transmission case 39, and a threshing feed chain drive shaft 52 and a threshing portion drive shaft 56 are further provided. 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. This 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. The valve assembly 62 is connected with 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. In this way, 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 of the present embodiment configured as described includes a pre-processing unit 2 that cuts stems and stems, a threshing feed chain 19 that transports the cut stems and stems along the threshing unit 3, and an engine that is input from an input shaft 38. An input shaft 38 that is provided with a preprocessing transmission case 39 that shifts the power to transmit to the preprocessing unit 2 and the threshing feed chain 19, and projects from one side of the preprocessing transmission case 39. Is extended to the other side from the other side of the pretreatment transmission case 39 to form the threshing portion drive shaft 56, so that power can be supplied to the threshing portion 3 using the pretreatment transmission case 39. Thereby, compared with the conventional thing which comprised the transmission path to the pre-processing transmission case 39 and the transmission path to the threshing part 3 separately, the transmission structure inside the fuselage can be simplified. Thus, it is possible to reduce the cost of the combine 1 and improve the maintainability.

  In addition, a threshing feed chain drive shaft 52 protrudes from the upper part of the other side surface of the pretreatment transmission case 39, and a threshing part drive shaft 56 protrudes from the lower part of the other side surface of the pretreatment transmission case 39. Since the continuously variable transmission 41 for shifting the engine power is disposed between the chain drive shaft 52 and the threshing portion drive shaft 56, the threshing feed chain drive shaft 52 and the threshing portion drive shaft 56 are separated from each other, 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 arrangement efficiency and avoid an increase in size of the preprocessing transmission case 39.

  Further, since the pretreatment transmission case 39 is also used as a hydraulic oil tank, it is not only easy to secure the tank capacity, but also the cost can be reduced by reducing the number of parts compared to the case where a hydraulic oil tank is provided separately. . Further, there is an advantage that the supply of hydraulic oil to the preprocessing continuously variable transmission 41 and the processing of return oil can be simplified.

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 Preprocessing part 3 Threshing part 19 Threshing feed chain 25 Pressure wind fan rotating shaft 31 Engine 38 Input shaft 39 Preprocessing transmission case 41 Preprocessing continuously variable transmission 52 Threshing feed chain drive shaft 56 Threshing part drive shaft

Claims (3)

A pre-processing unit that cuts off the stems, a threshing feed chain that conveys the cut stems along the threshing unit, and before transmission to the pre-processing unit and the threshing feed chain by shifting the engine power input from the input shaft In a combine comprising a processing transmission case,
The combine characterized in that the input shaft protruding from one side surface of the pretreatment transmission case extends from the other side surface of the pretreatment transmission case to the other side to serve as a threshing portion drive shaft.   A threshing feed chain drive shaft projects from the other side upper part of the pretreatment transmission case, and the threshing part drive shaft projects from the other side lower part of the pretreatment transmission case, and further the threshing feed chain drive. The combine according to claim 1, wherein a hydraulic continuously variable transmission for shifting engine power is disposed between a shaft and the threshing portion drive shaft.   The combine according to claim 1 or 2, wherein the pretreatment transmission case is also used as a hydraulic oil tank.

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