JP2006262809A - Grain culm transfer device of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary carrier device compactly at a low cost, which auxiliary carrier device is provided between a grain culm transfer system transferring grain culm reaped with a reaping blade and a threshing feed chain for receiving the grain culm from the grain culm transfer system and supplying to a threshing part. <P>SOLUTION: The auxiliary carrier device 85 is provided between a grain culm transfer device which includes a relay ear tip conveyor 32 and a relay plant foot conveyor 34, and a threshing feed chain 21, wherein driving force is directly took out from a driven sprocket 78 supporting through a transmission shaft 79 the front end of the threshing feed chain 21, a driving sprocket 81 is supported inside the machine body coaxially with the driven sprocket 81, and the auxiliary carrier device 85 having an inverse triangle winding, on a side view, the driving sprocket 81, two driven sprocket 82, 83 and a transfer chain 84. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes a cereal conveying device provided in a pretreatment unit that conveys cereals harvested by a cutting blade toward a threshing unit, and a threshing feed chain that takes over cereals from the cereal conveying device and supplies the cerealing unit to the threshing unit. It is related with the grain combiner conveying apparatus of the auxiliary combine provided between.

  Conventionally, a cereal conveyor comprising an upper conveying device and a lower conveying device that conveys cereals harvested by a cutting blade to the rear upper side, and a threshing feed chain that takes over cereals from this cereal conveying device and supplies it to a threshing unit In the meantime, there is known a combine which is provided with an auxiliary conveying device provided with a conveying chain parallel to the threshing feed chain and configured to increase the efficiency of passing cereals to the threshing feed chain via the auxiliary conveying device (for example, , See Patent Document 1).

And, in a side view, the driven sprocket that supports the front portion of the conveyance chain of the auxiliary conveyance device is disposed in front of the driven sprocket that supports the front portion of the threshing feed chain and inside the threshing feed chain, Power is taken out from the middle part of the cutting drive shaft inserted into the cylindrical rotation support shaft that also serves as the lifting and lowering rotation fulcrum of the cutting part (pre-processing part), and further through a reduction case provided with a speed reduction mechanism by chain transmission The auxiliary transport device can be driven in synchronization with the cutting travel speed.
JP-A-10-127140 (page 3-5, FIG. 4 to FIG. 5)

However, in the above-described conventional one, the threshing feed speed of the threshing feed chain is not synchronized with the harvesting traveling speed of the combine, and sufficient transportation performance to the threshing portion corresponding to the harvesting traveling speed cannot be obtained. Therefore, in order to synchronize the auxiliary transport device with the cutting travel speed and increase the efficiency of transferring the cereal to the threshing feed chain, the power must be taken out from the middle part of the cutting drive shaft, and the power to the auxiliary transport device There has been a problem that the transmission mechanism becomes large and complicated.

  The present invention is intended to solve the above-described problem, and in a combine including a threshing conveyer and a threshing feed chain for conveying cereals harvested by a cutting blade toward a threshing unit, the threshing A feed chain is driven in synchronism with the cutting travel speed, and an auxiliary transport device is provided between the threshing conveyor device and the threshing feed chain, and the auxiliary transport device is directly connected to the threshing feed chain via the threshing feed chain. It is the first feature that it is driven.

  The auxiliary transfer device has an inverted triangular shape in which the transfer chain is wound around the drive sprocket and the two driven sprockets in a side view, and the drive sprocket and the driven sprocket that supports the front end of the threshing feed chain are coaxial. Among the two driven sprockets, the front driven sprocket protrudes forward and upward from the front end of the threshing feed chain, while the rear driven sprocket is superposed on the conveying action side of the threshing feed chain in a side view. This is the second feature.

According to the first aspect of the present invention, in the combine provided with the threshing conveyor and the threshing feed chain for conveying the cereal harvested by the cutting blade toward the threshing section, the threshing feed chain is driven in synchronization with the cutting travel speed. And providing an auxiliary conveying device for assisting the takeover of the cereal between the cereal conveying device and the threshing feed chain, and driving the auxiliary conveying device directly via the threshing feed chain, thereby the auxiliary conveying device. Since the threshing feed chain is driven in synchronism with the cutting travel speed, the passing of the culm from the culm transport device to the threshing feed chain via the auxiliary transport device is performed smoothly and stably.

  According to the invention of claim 2, the auxiliary conveying device has an inverted triangular shape in which the conveying chain is wound around the driving sprocket and the two driven sprockets in a side view, and the front end portions of the driving sprocket and the threshing feed chain. Of the two driven sprockets, the front driven sprocket of the two driven sprockets protrudes forward from the front end portion of the threshing feed chain, while the rear driven sprocket is projected on the conveying action side of the threshing feed chain. Can be formed in a wide range in the transport action area of the transport chain wound around the two driven sprockets at a position higher than the drive sprocket, thereby allowing the grain to pass through the auxiliary transport device. Inheritance of cereals from the conveying device to the threshing feed chain is ensured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a combine 10, and FIG. 2 is a plan view. The combine 10 supports a body frame 12 on a pair of left and right crawler traveling devices 11, and a grain is placed in front of the body frame 12. A pre-processing unit 14 that conveys the cocoon to the threshing unit 13 is provided. In addition, a control unit 16 including a driver's seat 15 on which an operator is seated and various operation tools is arranged on the front right side on the machine body frame 12, and the rear side and the side of the threshing unit 13 have been selected. A grain tank 17 for temporarily storing the grains is provided.

  A relay conveyance device 19 is provided on the left side of the driver's seat 15 to convey the cereals harvested by the cutting blade 18 to the threshing unit 13, and on the left side of the threshing unit 13, the cereals are not shown. A threshing feed chain 21 to be supplied to the chamber is provided.

  In more detail, the pre-processing unit 14 cuts the culm that has been caused by the pulling device 22 from the culm in the field with the cutting blade 18, and sends the cereal that has been harvested to the rear while stirring the star wheel 23, and There are provided a scratching belt 24 with a locking claw that rotates integrally with the star wheel 23, a relay transport device 19 and a pre-processing transport device 25 for transporting the cereals fed from the star wheel 23 and the scraping belt 24.

  Then, the pretreatment transport device 25 inherits and conveys the left side stock-side transport chain 26 </ b> L that inherits and transports the stock side of the grain straw sent from the star wheel 23, and the tip side of the grain seed sent from the stir belt 24. It is comprised by the tip side conveyance body 27 to do.

  The tip side transport body 27 is composed of a transport chain in which a raising / lowering transporting claw 28 for transporting cereals is attached to the chain. In the transporting part of the culm, rotation of the chain in the transport direction causes an unillustrated guide. Thus, the conveying claw 28 is raised, and the tip of the cereal is locked to the conveying claw 28 so as to be conveyed backward.

  In addition, the pulling device 22 includes a raising and lowering conveying claw 29 attached to a conveying chain (not shown) that rotates in the vertical direction, and a guide (not shown) is rotated by the rotation of the conveying chain in the raising direction in the pulling action portion of the cereal. Thus, the conveying claw 29 is raised, and the grain claw 29 is raised while being locked to the conveying claw 29.

  In addition, the relay transfer device 19 inherits the tip side from the stock side side transfer chain 26R that inherits and transfers the strain source side of the cereals sent from the star wheel 23, and the tip side transport body 27 of the pretreatment transfer device 25. From the relay tip transport body 32 composed of a transport chain provided with a transportable claw 30 that can be moved up and down to the threshing section 13 side, and from the stock source side transport chain 26L on the left side of the pretreatment transport device 25, A handling depth conveyance device 33 that adjusts the handling depth while swinging up and down by inheritance, and a relay stock source conveyance chain 34 that inherits the stock side of the cereal from this handling depth conveyance device 33 and conveys it to the feed chain 21. ing.

  By the way, the drive system of the combine 10 which uses the engine E as a power source is configured as shown in FIG. 3. The engine pulley 42 fixed to the output shaft 41 of the engine E and the transmission belt are connected to the grain tank 17. 43, and the power of the engine E is input to the grain tank 17 via the input pulley 44, and a kernel discharge spiral (not shown) provided at the lower part of the grain tank 17 can be rotationally driven by this power. It has become.

  In addition, the power of the engine E is input to the pair of left and right crawler travel devices 11 through the engine pulley 46, the transmission belt 47, and the input pulley 48 to the transmission 51 that constitutes the travel drive system of the combine 10. The hydraulic continuously variable transmission 52 for traveling (hereinafter referred to as traveling HST) constituting the main transmission provided in the transmission 51, and the power shifted through the auxiliary transmission mechanism 53 and the gear train 54 are used for the crawler traveling apparatus. 11 drive sprockets 55 are transmitted.

  Then, power is once transmitted to the threshing unit 13 through the engine pulley 46, the work machine transmission belt 56, and the input pulley 58 of the gear case 57, which will be described later in detail, to the input shaft 61 of the gear case 57, and from here the counter Power is transmitted through the pulley 62, the threshing transmission belt 63, and the threshing input pulley 64. Further, this power is transmitted to a swinging sorter 66 or the like of a sorting chamber (not shown) via a rod shaft 65 and also to a handling cylinder 68 via a transmission belt 67 or the like.

  The gear case 57 continuously shifts the power of the engine E input from the input shaft 61 by a preprocessing hydraulic continuously variable transmission 71 (hereinafter referred to as “preprocessing HST”), and the preprocessing unit 14 and the threshing feed. It is comprised so that it may be transmitted to the chain 21, Thereby, the corn straw conveyance speed of the pre-processing part 14 and the threshing feed chain 21 can be changed arbitrarily.

  The pre-processing HST 71 includes an HST pump (swash plate variable displacement hydraulic pump) 72 and a hydraulic motor (fixed displacement hydraulic pump) 73 driven by pressure oil supplied from the HST pump 72. The preprocessing HST 71 can be steplessly shifted in accordance with the operation of the swash plate of the pump 72. In this embodiment, the swash plate control motor 74 is linked to the swash plate of the HST pump 72 so that the swash plate can be operated via the swash plate control motor 74.

Further, a threshing feed chain drive shaft 76 extended toward the threshing feed chain 21 is connected to the output shaft 75 of the gear case 57, and the threshing feed chain drive shaft 76 is
Above the machine frame 12, it is installed in front of the threshing unit 13 to reach the left end of the machine body, and the threshing feed chain 21 is driven via a drive sprocket 77 provided at the front end.

  A driven sprocket 81 supporting the front end of the threshing feed chain 21 is coaxially supported via the transmission shaft 79 on the inner side of the machine body, and the drive sprocket 81 and two (front and rear) driven are viewed from the side. An auxiliary conveyance device 85 having an inverted triangular shape in which a conveyance chain 84 is wound around the sprockets 82 and 83 is provided, and the auxiliary conveyance device 85 is directly connected via the threshing feed chain 21 driven in synchronization with the cutting speed. To be driven.

  That is, the auxiliary transport device 85 is a relay tip transport body 32, which is a cereal transport device that transports the cereals harvested by the cutting blade 18 toward the threshing unit 13, and the relay stock source transport chain 34 and the threshing feed chain 21. The auxiliary conveying device 85 is provided with two driven sprockets 82 and 83 arranged in an inverted triangular shape with the driving sprocket 81 as a vertex in a side view, and Since the transport chain 84 wound around the sprockets 81, 82, 83 is provided, it is possible to widen the transport action area of the transport chain 84 wound around the driven sprockets 82, 83 at a position higher than the drive sprocket 81. it can. The chain tensioning mechanism (not shown) of the conveying chain 84 can adjust the tension by moving the driven sprocket 83 on the rear side, which hardly affects the conveying function of the cereal, back and forth.

  And the auxiliary conveyance device 85 is driven directly via the threshing feed chain 21 that supplies the cereal to the threshing unit 13 in synchronism with the cutting traveling speed. The transfer of the cereal from the cereal conveyors 32 and 34 to the threshing feed chain 21 is performed smoothly and stably without interposing a special speed reduction mechanism.

Further, by supporting the drive sprocket 81 of the auxiliary transport device 85 and the driven sprocket 78 supporting the front end of the threshing feed chain 21 coaxially via the transmission shaft 79,
The power transmission mechanism to the auxiliary conveying device 85 that is linked to the threshing feed chain 21 can be configured in a compact and inexpensive manner, and the front (of the front and rear) driven sprockets 82 and 83 that constitute the auxiliary conveying device 85 are arranged on the front side. The driven sprocket 82 is projected forward and upward from the front end portion of the threshing feed chain 21, while the rear driven sprocket 83 is superposed on the conveying action side C of the threshing feed chain 21, so that the auxiliary sprocket 82 is passed through the auxiliary conveying device 85. As a result, the inheritance of the cereals from the cereal delivery devices 32 and 34 to the threshing feed chain 21 is ensured.

  Then, a more detailed description will be given of the manner in which the cereals are transferred from the cereal conveying devices 32 and 34 to the threshing feed chain 21 via the auxiliary conveying device 85 having the above-described configuration. First, the state of the AA cross section in FIG. As shown in FIG. 4, immediately before reaching the auxiliary transport device 85 from the relay tip transport body 32 and the relay stock former transport chain 34, which are grain feeders, the stock source side Sa of the rice straw S is most easily expanded, Some of them are in a hanging state as shown in the figure. The stock side Sa of the suspended grain culm S is lifted by the conveyance chain 84 constituting the auxiliary conveyance device 85 and is inherited by the auxiliary conveyance device 85 in the state of the BB cross section in FIG. 4, that is, as shown in FIG. Further, as shown in the CC cross section in FIG. 4, that is, as shown in FIG. 7, it is configured so that the stock source side Sa of the culm S can be reliably and smoothly inherited to the threshing feed chain 21 via the auxiliary conveying device 85. is doing.

  In addition, the pre-processing part 14 is supported around the vertical axis center (not shown) provided in front of the threshing part 13 so as to be horizontally rotatable in a floating state, and the pre-processing part 14 is reaped in front of the threshing part 13. In the combine 10 configured to be switched between the posture and the open posture in which the front of the threshing unit 13 is opened, the pre-processing unit 14 can be rotated horizontally by removing the auxiliary transport device 85.

  By the way, as shown in FIG. 3, the pre-processing output shaft 91 of the gear case 57 is provided with a pre-processing output pulley 92. From the pre-processing output pulley 92, the pre-processing transmission belt 93 and the pre-processing input pulley 94 are connected. The power is transmitted to the preprocessing unit 14 via this. A belt tension type mowing clutch 95 is provided between the preprocessing output pulley 92 and the preprocessing input pulley 94, and power is supplied to the preprocessing unit 14 by the on / off operation of the mowing clutch 95. Is intermittent.

  A belt tension type work machine clutch 96 is also provided between the engine pulley 42 described above and the input pulley 58 of the gear case 57, and the power to the gear case 57 is transmitted by the on / off operation of the work machine clutch 96. Supply is interrupted.

  A steering lever 97 that also serves as an ascending / descending operation tool of the preprocessing unit 14 is provided on the front side of the control unit 16 where the driver's seat 15 is provided. And the pre-processing unit 14 can be moved up and down, and on the left side of the driver's seat 16, a main transmission lever 98 as an operation tool for shifting the traveling HST 52 and an auxiliary transmission mechanism 53 in the transmission 51 are operated. An auxiliary transmission lever 99 that changes the vehicle speed stepwise is provided.

The side view of a combine. The top view of a combine. The drive system diagram of a combine. The principal part side view which shows the arrangement | positioning state of an auxiliary conveyance apparatus. AA sectional drawing in FIG. BB sectional drawing in FIG. CC sectional drawing in FIG.

Explanation of symbols

13 Threshing section 18 Cutting blade 21 Threshing feed chain 32 Grain trough transport device (relay head transport body)
34 Grain feeder (Transfer stock former transport chain)
78 Driven sprocket
81 Drive sprocket 82 Driven sprocket (front side)
83 Driven sprocket (rear side)
84 Conveying chain 85 Auxiliary conveying device S Flour C Conveying side

Claims (2)

In a combine comprising a cereal conveyor (32, 34) and a threshing feed chain (21) for transporting cereals (S) cut by the cutting blade (18) toward the threshing section (13), the threshing feed chain ( 21) is driven in synchronism with the cutting travel speed, and an auxiliary conveying device (85) for assisting the takeover of the cereal (S) between the cereal conveying device (32, 34) and the threshing feed chain (21). The combine cereal conveying apparatus characterized by providing and driving this auxiliary conveying apparatus (85) directly via a threshing feed chain (21).   The auxiliary transfer device (85) has an inverted triangular shape in which a transfer chain (84) is wound around a drive sprocket (81) and two driven sprockets (82, 83) in a side view, and the drive sprocket (81) And the driven sprocket (78) supporting the front end of the threshing feed chain (21) are coaxially supported, and the front driven sprocket (82) of the two driven sprockets (82, 83) is threshing the feed chain (21 2), the rear driven sprocket (83) is superposed on the conveying action side (C) of the threshing feed chain (21) in a side view. Combine grain feeder.