JP2008301715A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester which uses a lubricant for a travel mission case as a hydraulic fluid, enables advantageous performance of assembling work, and facilitates checking of a valve mechanism. <P>SOLUTION: This combine harvester is constituted by disposing a travel mission case 20 in the front portion of a self-propelled machine frame, connecting a reaping portion, in a state capable of being swung and lifted, and disposing a hydraulic cylinder 16 for lifting of lowering the reaping portion is characterized by disposing a hydraulic pump 52 for supplying a lubricant for the travel mission case 20 as a hydraulic oil; and an oil filter 50 acting on the oil supplied to the hydraulic cylinder 16 with the hydraulic pump 52, in the sidewall portion 20a of the travel mission case 20, and further disposed with a valve mechanism 57 for controlling the hydraulic cylinder 16, in the upper end portion 20b of the travel mission case 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a combine provided with a hydraulic cylinder for providing a traveling mission case at a front portion of a self-propelled airframe, connecting a cutting part so as to be swingable up and down, and operating the cutting part up and down.

Conventionally, for example, Patent Document 1 discloses the above-described combine.
The combine described in Patent Document 1 includes a cutting part, a hydraulic cylinder, and a transmission part.
The hydraulic cylinder moves up and down the cutting part.
The mission unit includes a hydrostatic continuously variable transmission, and displays forward travel and reverse travel that are continuously variable by a speed change operation of the hydrostatic continuously variable transmission.

  In this type of combine, conventionally, when using the lubricating oil for the traveling mission case as the hydraulic oil for the hydraulic cylinder, the hydraulic pump is provided in the engine and the hydraulic cylinder valve mechanism is provided in the operating section.

Japanese Patent Laid-Open No. 5-49329 (paragraph [0007], FIG. 2)

  With this type of conventional combine, when assembling the combine, the installation of the engine to the self-propelled aircraft, the assembly of the operating unit, and the installation of the traveling mission case to the self-propelled aircraft are completed. In addition to the work of connecting the hydraulic cylinder, the work of connecting the hydraulic pump and the traveling transmission case and the work of connecting the hydraulic pump and the valve mechanism had to be performed, which took time for assembly work. .

  SUMMARY OF THE INVENTION An object of the present invention is to provide a combine that can advantageously perform assembling work while using lubricating oil of a traveling mission case as hydraulic oil and that can easily check a valve mechanism.

The first aspect of the present invention is a combine provided with a hydraulic cylinder for providing a traveling mission case at the front portion of the self-propelled airframe and connecting the cutting portion so as to be swingable up and down and operating the cutting portion up and down.
A hydraulic pump that supplies lubricating oil of the traveling mission case as hydraulic oil to the hydraulic cylinder, and an oil filter that acts on oil supplied to the hydraulic cylinder by the hydraulic pump, and a lateral wall portion of the traveling mission case Provided in
A valve mechanism for controlling the hydraulic cylinder is provided at the upper end of the traveling mission case.

  According to the configuration of the first aspect of the present invention, the hydraulic pump, the oil filter, and the valve mechanism are attached to the traveling mission case before being assembled to the self-propelled machine body, and the hydraulic pump, the oil filter, and the valve mechanism are attached. If the assembly method of assembling a certain traveling mission case to the self-propelled aircraft is adopted, when assembling the combine, the operation for connecting the traveling mission case and the hydraulic pump, and the operation for connecting the hydraulic pump and the valve mechanism And can be made unnecessary.

  This type of combine is often performed from the front side of the self-propelled body of the traveling mission case when checking the valve mechanism. According to the configuration of the first aspect of the present invention, the hydraulic pump and the oil filter are provided on the lateral wall portion of the traveling mission case, and the valve mechanism is provided on the upper end portion of the traveling mission case. The valve mechanism can be handled in a state where it is difficult to receive.

  Therefore, in the assembly of the combine, the operation of connecting the traveling mission case and the hydraulic pump, and the hydraulic pump, while driving the hydraulic cylinder using the lubricating oil of the traveling mission case as the hydraulic fluid, This eliminates the need for connecting the valve mechanism and can be performed efficiently. Moreover, when the valve mechanism is inspected, the hydraulic pump and the oil filter are not easily obstructed and can be easily and efficiently performed.

  In the second aspect of the invention, the main frame of the cutting unit is positioned immediately before the hydraulic pump and the oil filter in the lowering operation state of the cutting unit.

In order to enable the middle cutting operation, the mowing unit is configured to be positioned immediately before the self-propelled aircraft in a state of having a working width extending over the entire width or almost the entire width of the self-propelled aircraft. Then, the main frame of the cutting part that is connected to the front part of the self-propelled aircraft so as to be swingable up and down stably supports the cutting part by being positioned at or near the center in the lateral direction of the cutting part. The main frame of the cutting part and the traveling mission case come closer.
According to the configuration of the second aspect of the invention, since the main frame of the cutting unit is positioned immediately before the hydraulic pump and the oil filter in the lowering work state of the cutting unit, the interference between the main frame of the cutting unit and the hydraulic pump and the oil filter. The main frame of the cutting part and the traveling mission case can be brought close to each other, and the cutting part is located immediately in front of the self-propelled aircraft with the full width of the self-propelled aircraft or a work width covering almost the entire width. You can

  Therefore, it is possible to obtain a combine capable of performing a mid-cutting operation while providing a hydraulic pump and an oil filter on the lateral wall portion of the traveling mission case.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a combine according to an embodiment of the present invention. FIG. 2 is an overall plan view of the combine according to the embodiment of the present invention. FIG. 3 is a front view of the combine according to the embodiment of the present invention. As shown in these drawings, the combine according to the embodiment of the present invention is a self-propelled aircraft that is self-propelled by a pair of left and right crawler-type traveling devices 1 and 1, and a front frame 2 of the self-propelled aircraft. A reaping device 10 and a grain tank 4 which are arranged in the lateral direction of the self-propelled machine body on the rear side of the machine body frame 2 are provided.

This combine harvests rice, wheat and the like.
That is, the self-propelled aircraft includes the pair of left and right traveling devices 1, 1, and also includes a driving unit 6 equipped with a driving seat 5 positioned in front of the grain tank 4, below the driving seat 5. It has a prime mover equipped with the engine 7 provided.

  The mowing unit 10 includes a mowing unit frame 15 having a main frame 15 a that is supported at the front of the machine body frame 2 so as to be swingable up and down on the lateral side of the operating unit 6. In addition to the main frame 15a, the mowing unit frame 15 includes a plurality of weed frames 15b that are connected to the front end of the main frame 15a side by side in the lateral direction of the self-propelled aircraft. The cutting unit 10 is configured such that the cutting unit frame 15 swings up and down with respect to the machine frame 2 by a hydraulic cylinder 16 connected to the main frame 15 a and the machine frame 2. The weeding tool 11 provided at the front end of 15b is moved up and down into a descending working state in which the weeding tool 11 is lowered near the ground, and an ascending non-working state in which the weeding tool 11 is raised from the ground.

  When the cutting unit 10 is moved down and the self-propelled machine is driven, the cutting unit 10 divides the planted cereals into a cutting target and a non-cutting target by the weeding tool 11, and each weeding tool 11. The planted culm to be harvested from is raised and processed by the corresponding one of the pair of left and right pulling devices 12, 12, and cut by the clipper-shaped cutting device 13 and cut. The cereals are conveyed toward the rear of the machine body by the supply device 14 and supplied to the threshing feed chain 3a of the threshing device 3.

  The threshing device 3 supplies the tip side to the handling room (not shown) while squeezing and conveying the stock side of the harvested cereal rice cake in the rear direction of the machine body by the threshing feed chain 3a, and performs the threshing process. The grain tank 4 is supplied with threshing grains from the threshing device 3 and stores them.

  FIG. 4 is a side view of the transmission structure for running and mowing. As shown in this figure, the transmission structure includes a traveling mission case 20 provided at the front portion of the body frame 2, and an input shaft 21 provided sideways on the self-propelled body is provided on the traveling mission case 20. A side corresponding to the end portions of a pair of left and right traveling output shafts 23, 23 that are interlocked with the output shaft 7 a of the engine 7 via the transmission belt 22 and provided in the lower part of the traveling mission case 20 in a lateral direction. The crawler drive wheel body 1a of the traveling device 1 is provided so as to be integrally rotatable, and a cutting output shaft 24 provided sideways on the self-propelled machine body is provided on the traveling mission case 20 via the transmission belt 25. It is linked to the shaft 17.

  The transmission belt 22 constitutes a traveling belt tension clutch. The input shaft 17 of the reaping portion 10 is rotatably supported by a base portion 15c that is rotatably connected to the body frame 2 of the main frame 15a.

  FIG. 6 is a longitudinal front view of the traveling mission case 20. As shown in the figure, the traveling mission case 20 includes the input shaft 21, the pair of left and right traveling output shafts 23 and 23, and the cutting output shaft 24, and also includes the input shaft 21 as a pump shaft. A traveling transmission mechanism 30 that links the input shaft 21 to the pair of left and right traveling output shafts 23, 23 by a hydrostatic continuously variable transmission 31 or the like, a transmission gear 41 that is provided on the input shaft 21 so as to be integrally rotatable, and the like. And a cutting transmission mechanism 40 for interlocking the input shaft 21 with the cutting output shaft 24.

  As shown in FIG. 6, the travel transmission mechanism 30 includes the hydrostatic continuously variable transmission 31, and a transmission gear 33 meshed with a gear portion of the motor shaft 32 of the hydrostatic continuously variable transmission 31. A transmission gear 35 provided on the rotation support shaft 34 of the transmission gear 33 so as to be integrally rotatable, a transmission gear 36 meshed with the transmission gear 35, and a transmission shaft 37 connected to the transmission gear 36 so as to be integrally rotatable. And a pair of left and right meshing steering clutches 38, 38 provided at both ends of the transmission shaft 37, and the left traveling output shaft engaged with the output gear 38a of the left steering clutch 38. 23, and a transmission gear 39 provided on the right travel output shaft 23 so as to be integrally rotatable with the output gear 38a of the right steering clutch 38. There.

  The mowing transmission mechanism 40 includes the transmission gear 41, a transmission gear 42 meshed with the transmission gear 41, a transmission gear 44 provided so as to be integrally rotatable on a rotation support shaft 43 of the transmission gear 42, and the transmission A transmission gear 45 is provided so as to rotate integrally with the cutting output shaft 24 while being engaged with the gear 44.

  The traveling mission case 20 includes a pair of left and right steering brakes 60, 60 that are arranged at both ends of the transmission shaft 37. Each of the steering brakes 60 includes a plurality of brake plates engaged with the output gear 38a of the steering clutch 38 so as to be integrally rotatable, and a plurality of friction plates locked to the traveling mission case 20. It is a multi-plate friction brake.

  FIG. 7 is a hydraulic circuit diagram for operating the hydraulic cylinder 16. As shown in this figure, the hydraulic circuit includes a hydraulic pump 52 connected to a suction oil passage 51 having an oil filter 50, and an oil supply passage 54 for supplying pressure oil from the hydraulic pump 52 to a steering valve 53. A valve mechanism 57 in which an elevating valve 57a is connected to the oil supply passage 54 via an oil supply passage 56 having a switching valve 55, and a pilot check valve 57b of the valve mechanism 57 are connected to the hydraulic cylinder 16. The operation oil path 58 is provided.

  The suction oil passage 51 is connected to an oil take-out portion of the traveling mission case 20. As shown in FIGS. 4, 5, and 6, the hydraulic pump 52 and the oil filter 50 are provided on the lateral wall portion 20 a opposite to the side from which the input shaft 21 protrudes of the traveling mission case 20. ing. A pump shaft (not shown) of the hydraulic pump 52 is connected to the end of the input shaft 21.

  The steering valve 53 operates a pair of left and right hydraulic pistons 61, 61 provided in the traveling mission case 20, thereby operating the steering clutch 38 and the steering brake 60. The switching valve 55 is operated in conjunction with the steering valve 53. When the steering valve 53 is switched to a turning state, the oil supply passage 56 is switched to a closed state, and the steering bubble 53 is in a straight traveling state. When the switching operation is performed, the oil supply passage 56 is changed to an open state, and the pressure oil from the oil supply passage 54 is supplied to the lift valve 57a of the valve mechanism 57.

  The valve mechanism 57 includes the lift valve 57a and the pilot check valve 57b, and also includes a valve case 57c that houses the lift valve 57a and the pilot check valve 57b. In this valve mechanism 57, when the lift valve 57a is switched, the pilot check valve 57b is made to correspond to the operation state of the lift valve 57a by supplying and discharging pilot pressure oil to and from the pilot oil passage 67 by the lift valve 57a. Switching to an open or closed state is performed to supply / discharge pressure oil to / from the hydraulic cylinder 16 and stop supply / discharge.

  The valve case 57c of the valve mechanism 57 accommodates the elevating valve 57a and the pilot check valve 57b, as well as the steering valve 53, the switching valve 55, the oil supply passage 56, and the oil supply. The relief valve 62 connected to the passage 54 and the relief valve 65 and the variable relief valve 66 connected to the operation oil passage 64 of the steering clutch 38 are accommodated.

  As shown in FIGS. 4 and 5, the valve mechanism 57 is provided at the upper end 20 b of the traveling mission case 20. The valve mechanism 57 protrudes upward from the upper end portion 20b of the traveling mission case 20, and is damaged by the hydraulic pump 52 and the oil filter 50 from the front side of the traveling body of the traveling mission case 20 during inspection. It can be handled in difficult conditions.

  That is, the hydraulic pump 52 is driven by the input shaft 21 of the traveling mission case 20, and the lubricating oil stored in the traveling mission case 20 is extracted from the traveling mission case 20 via the oil filter 50, and the oil supply path 54. It supplies to the raising / lowering valve 57a through the oil supply path 56. When the operation lever 68 (see FIGS. 1-3) provided in the operation unit 6 is operated in conjunction with the elevating valve 57a via an interlocking mechanism (not shown), and the elevating valve 57a is switched to the raised state. The valve mechanism 57 supplies the lubricating oil from the oil supply passage 56 to the hydraulic cylinder 16 through the operation oil passage 58 as hydraulic oil. Then, the hydraulic cylinder 16 is driven to the extension side and the mowing unit 10 is raised. When the elevating valve 57 a is switched to the lowered state, the valve mechanism 57 discharges the pressure oil in the hydraulic cylinder 16 through the operation oil path 58. Then, the hydraulic cylinder 16 is driven to the shortening side by the load of the cutting unit 10 to lower the cutting unit 10.

  As shown in FIG. 3, the cutting unit 10 has a working width W set at an interval between the tips of the weeding tools 11 located at both ends of the plurality of weeding tools 11 in the lateral direction of the self-propelled machine body. I have. The working width W is substantially equal to the entire width of the self-propelled aircraft. FIG. 3 shows the relative positions of the cutting unit 10 and the self-propelled machine body in a front view. FIG. 4 shows the relative positions of the main frame 15a and the traveling mission case 20 in a side view when the cutting unit 10 is in the descending operation state. FIG. 5 shows the relative positions of the main frame 15a and the traveling mission case 20 in a front view when the cutting unit 10 is in the descending operation state. FIG. 4 shows a side view shape of the traveling mission case 20. As shown in these drawings, the mowing unit 10 is in a state in which the work site having the work width W is located immediately in front of the self-propelled aircraft, and the mowing unit 10 and the self-propelled aircraft are close to each other in the front-rear direction. It is connected to the fuselage frame 2 in a state.

  That is, as shown in FIG. 4, in the traveling mission case 20, the input shaft 21 and the oil filter 50 are positioned on the rear side of the self-propelled machine body with respect to the traveling output shaft 23, and the cutting output shaft 24 is The upper side of the traveling mission case 20 has a side view shape biased toward the rear side of the self-propelled aircraft relative to the lower side so as to be located on the rear side of the self-propelled aircraft relative to the input shaft 21. The main frame 15 a is positioned immediately before the oil filter 50 and the hydraulic pump 51 in a state where the cutting unit 10 is lowered to the lowering operation state.

Combine side view Overall plan view of combine Combine front view Side view of transmission structure Front view showing the relative position of the main frame of the cutting part and the traveling mission case Longitudinal front view of traveling mission case Hydraulic circuit diagram

Explanation of symbols

10 Mowing portion 15a Main frame 16 Hydraulic cylinder 20 Mission case 20a for traveling Side wall portion 50 Oil filter 52 Hydraulic pump 57 Valve mechanism

Claims (2)

In the front part of the self-propelled aircraft body, a traveling mission case is provided and a cutting part is connected so as to be able to swing up and down, and the combine is provided with a hydraulic cylinder for raising and lowering the cutting part,
A hydraulic pump that supplies lubricating oil of the traveling mission case as hydraulic oil to the hydraulic cylinder, and an oil filter that acts on oil supplied to the hydraulic cylinder by the hydraulic pump, and a lateral wall portion of the traveling mission case Provided in
A combine in which a valve mechanism for controlling the hydraulic cylinder is provided at an upper end of the traveling mission case.   The combine according to claim 1, wherein a main frame of the cutting unit is positioned immediately before the hydraulic pump and the oil filter in a lowering operation state of the cutting unit.

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