JP2004283048A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize a space to enhance the efficiency of an arrangement, and improve the maintainability of a continuously variable transmission for a preliminarily treating section, when the continuously variable transmission for the preliminarily treating section is disposed in a combine harvester. <P>SOLUTION: This combine harvester which is provided with a preliminarily treating section 2 for reaping stem culms and with a threshing feed chain 10 for transporting the reaped stem culms along a threshing section 3 and in which a power changed with the continuously variable transmission for the preliminarily treating section is transmitted to the preliminarily treating section 2 and the threshing feed chain 10 through a gear case 23 is characterized by horizontally disposing the continuously variable transmission for the preliminarily treating section under a threshing feed chain-driving shaft 48 extended from the gear chain 23 to the threshing feed chain 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of a combine for transmitting power shifted by a continuously variable transmission to a pretreatment unit and a threshing feed chain.
[0002]
[Prior art]
In general, in this type of combine, while a power that varies according to the vehicle speed is supplied to a pre-processing unit that cuts stem culms, a constant power is supplied to a threshing unit that threshes cut stems and hulls. There is a possibility that there is a difference between the stalk culm conveyance speed of the threshing feed chain provided in the section and the stalk culm conveyance speed in the pretreatment section, and the conveyance turbulence may occur in the transfer section. Therefore, by supplying continuously variable power according to the vehicle speed to the pre-processing unit and the threshing feed chain, the conveying speed of the stem and culm of the pre-processing unit and the threshing feed chain is synchronized, and the conveyance disturbance at the transfer unit is prevented. (For example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-291323 (page 3, FIG. 2)
[0004]
[Problems to be solved by the invention]
By the way, in the above, there is provided a continuously variable transmission (HST) for preprocessing that continuously changes the engine power, and a gear case that distributes the continuously variable power to the preprocessing unit and the threshing feed chain. However, in the device disclosed in Patent Document 1, the preprocessing continuously variable transmission is provided on the engine side (near the center of the body) of the gear case, so that the maintenance performance of the preprocessing continuously variable transmission is inferior. Since the mounting position of the processing stepless transmission is located above the gear case, there is also a problem that the center of gravity is high and the stability is poor.
[0005]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and has been created with the object of solving these problems, and includes a pretreatment unit for cutting a stem and a threshing for transporting the cut stem along a threshing unit. A threshing extending from the gear case to the threshing feed chain in a combine for transmitting the power shifted by the pre-processing continuously variable transmission to the pre-processing unit and the threshing feed chain via a gear case. The continuously variable transmission for pre-processing is arranged horizontally below the feed chain drive shaft. That is, by disposing the continuously variable transmission for pretreatment by utilizing the space below the threshing feed chain drive shaft, not only can the arrangement efficiency be improved, but also the maintainability of the continuously variable transmission for pretreatment is improved. be able to. Moreover, since the continuously variable transmission for pre-processing is arranged horizontally, the stability can be improved with a low center of gravity.
Further, the swash plate control motor of the continuously variable transmission for pre-processing is disposed above the continuously variable transmission for pre-processing and in front of the threshing feed chain drive shaft. In this case, by disposing the swash plate control motor using the front space of the threshing feed chain drive shaft, not only can the arrangement efficiency be increased, but also the maintainability of the swash plate control motor can be improved. Can be.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, the combine 1 is a pre-processing unit 2 for cutting stem culm, a threshing unit 3 for threshing grain from the cut stem and culm, and sorting the grain, A kernel tank 4 for storing grains, a post-processing unit 5 for processing threshed culms, an operating unit 6 provided with various operating tools, and a crawler-type traveling unit 7 are provided. I have.
[0007]
The pre-processing unit 2 includes a divider 8 for weeding the uncut stem, a raising device (not shown) for raising the cut stem, and a cutting blade device for cutting the root position of the stem ( (Not shown)) and a pretreatment transport device (not shown) for transporting the harvested stem to the threshing unit 3, and is connected to the front of the combine 1 so as to be able to move up and down.
[0008]
The threshing unit 3 includes a handling room (not shown) in which the handling cylinder 9 is installed, a sorting room (not shown) for sorting threshed grains, and a threshing feed chain for conveying stems along the handling room. 10 and a straw transport device (not shown) for transporting the threshed straw toward the post-processing unit 5 and is configured in a unit shape, and is mounted on the body frame 11 in the body assembly process. You. The threshing feed chain 10 is suspended by a plurality of driven sprockets (not shown) and a single driving sprocket 12, and is conveyed in accordance with the rotation of the driving sprocket 12.
[0009]
An engine 13 that supplies power to the pre-processing unit 2, the threshing unit 3, the grain tank 4, the traveling unit 7, and the threshing feed chain 10 is mounted below the operation unit 6. The grain tank 4 inputs engine power via an engine pulley 14, a transmission belt 15, and a tank input pulley 16, and operates a spiral conveyor (not shown) in the tank with the power. The power of the traveling unit 7 is transmitted to a transmission case 19 via an engine pulley 14, a transmission belt 17, and a transmission input pulley 18, and is shifted by a traveling continuously variable transmission (HST) 20 or the like provided inside the transmission case 19. After that, it is transmitted to the drive wheels 7a of the traveling unit 7.
[0010]
The power of the threshing unit 3 is once transmitted to an input shaft 24 of a gear case 23, which will be described later, via an engine pulley 14, a work implement transmission belt 21, and a gear case input pulley 22, and from there, a counter pulley 25, a threshing transmission belt 26, and a threshing The power is transmitted to the threshing unit 3 via the input pulley 27. This power is transmitted to the swinging sorting body 29 and the like in the sorting room via the Karamin shaft 28 and to the handling drum 9 via the transmission belt 30 and the like.
[0011]
The gear case 23 is configured such that the engine power input from the input shaft 24 is continuously variable by a pre-processing continuously variable transmission (HST) 31 and is supplied to the pre-processing unit 2 and the threshing feed chain 10. . As a result, the stalk transport speed of the pre-processing unit 2 and the threshing feed chain 10 is synchronized, and transport turbulence in the transfer unit is prevented. The continuously variable transmission for pre-processing 31 includes an HST pump (swash plate type variable displacement hydraulic pump) 32 and an HST motor (fixed displacement hydraulic motor) 33 driven by the discharge oil of the HST pump 32. , The engine power can be continuously changed in response to the swash plate operation of the HST pump 32. In the present embodiment, a swash plate control motor 34 is connected to the swash plate of the HST pump 32, and the swash plate operation is performed via the swash plate control motor 34. Hereinafter, the configuration of the gear case 23 will be described in detail.
[0012]
The gear case 23 includes an HST pump connecting shaft 35, an HST motor connecting shaft 36, a counter shaft 37, a preprocessing output shaft 38, and a feed chain output shaft 39 in addition to the input shaft 24 as shaft members. The input shaft 24 transmits power input from the gear case input pulley 22 to the HST pump connection shaft 35 via a pair of gears 40. The HST pump connecting shaft 35 and the HST motor connecting shaft 36 are cylindrical joint shafts, and the pump shaft 32a of the HST pump 32 or the motor shaft 33a of the HST motor 33 are connected so as to be freely inserted and removed. That is, the pre-processing continuously variable transmission 31 is mounted on the mounting seat 23 a formed on one side surface of the gear case 23 via the bolt 41, and continuously varies the power input from the HST pump connecting shaft 35. Is output to the HST motor connecting shaft 36. By attaching the pre-process continuously variable transmission 31 in this manner, the pre-process continuously variable transmission 31 can be detached independently without removing the pulleys and the power transmission belt. The maintainability of the device 31 can be improved.
[0013]
The motor power of the preprocessing continuously variable transmission 31 output to the HST motor connecting shaft 36 is transmitted to the counter shaft 37 via a pair of gears 42, and from there, the preprocessing output shaft 38 is transmitted via a pair of gears 43. It is transmitted to. Further, the preprocessing output shaft 38 transmits power via a pair of gears 45 to a sprocket 44 rotatably provided on the counter shaft 37, and the power is transmitted via a transmission chain 46 and a sprocket 47. The power is transmitted to the feed chain output shaft 39.
[0014]
A threshing feed chain drive shaft 48 extending toward the threshing feed chain 10 is connected to the feed chain output shaft 39. The threshing feed chain drive shaft 48 reaches the left end of the fuselage above the fuselage frame 11 in front of the threshing unit 3 and drives the drive sprocket 12 connected to the tip. On the other hand, an output pulley 49 is provided on the preprocessing output shaft 38, from which power is supplied to the preprocessing unit 2 via the preprocessing transmission belt 50 and the preprocessing input pulley 51.
[0015]
The gear case 23 is provided with three belt tension fulcrums S1, S2, S3. The first belt tension fulcrum S1 is for rotatably supporting the belt tension 52 for the mowing clutch, and is formed using the support cylinder 23b of the preprocessing output shaft 38. The belt tension 52 for the reaping clutch tensions or relaxes the pre-processing transmission belt 50 by rotation about the belt tension fulcrum S1. The second belt tension fulcrum S2 rotatably supports the work machine clutch belt tension 53, and is provided at the lower end of the gear case 23. Then, the work machine clutch belt tension 53 tensions or relaxes the work machine transmission belt 21 by rotation about the belt tension fulcrum S2. The third belt tension fulcrum S3 is for rotatably supporting the belt tension 54 of the threshing transmission belt 26, and is provided at the lower end of the gear case 23 so as to be aligned with the second belt tension fulcrum S2. By intensively providing the three belt tension fulcrums S1, S2, and S3 on the gear case 23, the number of parts can be reduced and the structure can be simplified. In addition, the pulleys 22, 25, 49 around which the belts 21, 26, 50 are suspended and the belt tension fulcrums S1 to S3 of the belts 21, 26, 50 are provided on the same gear case 23, so that the belt tension fulcrum S1 is provided. The dimensional accuracy of S3 can be improved.
[0016]
Next, the arrangement of the pre-processing continuously variable transmission 31 and the swash plate control motor 34, which are features of the present invention, will be described. The gear case 23 is a vertical case narrow in the left and right directions, and is disposed at a right end in a space in front of the threshing unit 3 (above the left front end of the body frame 11). The above-described pulleys 22, 25, and 49 are intensively mounted on the right side surface of the gear case 23 facing the engine 13, and the continuously variable pre-transmission 31 is provided on the left side of the gear case 23 facing the space in front of the threshing unit 3. Attached to the surface. At this time, the pre-processing continuously variable transmission 31 is placed in a horizontal position such that the HST motor 33 and the HST pump 32 are arranged in front and rear, and is disposed below the threshing feed chain drive shaft 48. Thereby, not only can the space below the threshing feed chain drive shaft 48 be used effectively, but also the preprocessing continuously variable transmission 31 can be arranged in the space in front of the threshing unit 3 to improve its maintainability.
[0017]
The swash plate control motor 34 is attached to the front upper portion of the preprocessing continuously variable transmission 31 so as to be disposed in the front space of the threshing feed chain drive shaft 48. Thus, not only can the space on the front side of the threshing feed chain drive shaft 48 be used effectively, but also the swash plate control motor 34 can be disposed on the front side in the space in front of the threshing unit 3 to improve the maintainability.
[0018]
In the apparatus configured as described above, the pre-processing unit 2 for cutting the stems and stems and the threshing feed chain 10 for transporting the cut stems along the threshing unit 3 are provided. A combine 1 that transmits the shifted power to the pre-processing unit 2 and the threshing feed chain 10 via the gear case 23, and below the threshing feed chain drive shaft 48 extending from the gear case 23 toward the threshing feed chain 10. Since the pre-process continuously variable transmission 31 is arranged horizontally, not only can the space below the threshing feed chain drive shaft 48 be effectively used to improve the arrangement efficiency in the combine 1 but also the pre-process The maintainability of the step transmission 31 can be improved. In addition, since the continuously variable transmission 31 for pre-processing is arranged horizontally, the center of gravity can be reduced and the stability can be improved.
[0019]
In addition, since the swash plate control motor 34 of the preprocessing continuously variable transmission 31 is disposed above the preprocessing continuously variable transmission 31 and in front of the threshing feed chain drive shaft 48, the threshing feed chain drive By effectively utilizing the space on the front side of the shaft 48, not only the arrangement efficiency in the combine 1 can be increased, but also the maintainability of the swash plate control motor 34 can be improved.
[Brief description of the drawings]
FIG. 1 is a left side view showing the inside of a combine.
FIG. 2 is a right side view showing the inside of the combine.
FIG. 3 is a front view showing the inside of the combine.
FIG. 4 is an explanatory diagram showing a transmission configuration of a combine.
FIG. 5 is a perspective view of a gear case portion.
FIG. 6 is a plan view of a gear case portion.
FIG. 7 is a front view of a gear case portion.
FIG. 8 is a left side view of the gear case.
FIG. 9 is a right side view of the gear case.
FIG. 10 is a developed sectional view of the gear case.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combine 2 Preprocessing part 3 Threshing part 10 Threshing feed chain 12 Drive sprocket 13 Engine 23 Gear case 24 Input shaft 31 Preprocessing continuously variable transmission 32 HST pump 33 HST motor 34 Swash plate control motor 38 Preprocessing output shaft 39 Feed Chain output shaft 48 Threshing feed chain drive shaft

Claims (2)

A pre-processing unit for cutting the stems and stems, and a threshing feed chain for conveying the cut stems and stems along the threshing unit. In the combine for transmitting to the threshing feed chain, the preprocessing continuously variable transmission is arranged horizontally below the threshing feed chain drive shaft extending from the gear case toward the threshing feed chain. Combine. 2. The combine according to claim 1, wherein the swash plate control motor of the pre-processed continuously variable transmission is arranged above the pre-processed continuously variable transmission and at the front of the threshing feed chain drive shaft. Combine features.

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