JP2009232758A - Operating device of agricultural work vehicle - Google Patents

Abstract

[PROBLEMS] To improve the operational efficiency by improving the operability by improving the operational feeling of an operation lever of an agricultural work vehicle.
A first left and right torque spring 33 and a second left and right torque spring 34 are wound around one side of a spring support shaft 32 and the other side, and left and right linkage portions 33a, 33b, 34a and 34b are spaced upward by a predetermined distance. A small-sized movable pin 36 is attached to the spring linking arm 22a and arranged in the space between the left and right linking portions 33a, 33b, 34a, 34b. A fixing pin 37 and a large-diameter adjustment pin 38 are provided, the fixing pin 37 is disposed in the space between the left and right linkage portions 33a and 33b of the first left and right torque spring 33, and the peripheral surface of the adjustment pin 38 is the second torque spring 34. It arrange | positions in the contact state in the space | interval part of left-right linkage part 34a, 34b.
[Selection] Figure 5

Description

  The present invention relates to an operating device for an agricultural work vehicle such as a combine.

In an agricultural work vehicle such as a combine, an operation lever that is offset from the front center to the right side of the driver's seat is linked to a mechanism that steers the traveling machine body, and travels from the neutral position N of the operation lever to the left and right direction L When steering the vehicle by tilting to R, the tilting operation force FR to the right is smaller than the tilting operation force FL to the left of the control lever, and the feeling of left and right operations is equalized. The thing is well-known (patent document 1).
JP 2001-222333 A

  A single spring is attached to the operation lever of the prior art, and the spring is returned from the tilting operation position to the neutral position. When the operation lever is rotated from the neutral position to the left and right, the spring is neutral. In the operation area close to the position, the neutral position returning action is weak, and when the operation area is far from the neutral position, it tends to become suddenly strong, and there is a problem that it is difficult to operate the appropriate operation area. Therefore, the present invention is intended to solve such a problem.

  According to the present invention, an operating body (22) is pivotally supported around a longitudinal axis (23) on a frame portion (21) of a control section (3), and an operating lever (11) is supported on the operating body (22). Is pivotally supported about the left-right axis (24), and when the operating lever (11) is turned about the left-right axis (24) in the front-rear direction, the cutting and conveying section (7) is raised and lowered, When the left and right directions are rotated about the direction axis (23), the airframe traveling direction is steered to the left and right. The operating body (22) is provided with a spring linking arm (22a) protruding downward, and the frame portion (21 ) Is provided with a spring support shaft (32) along the front-rear direction so as to be positioned below the spring linking arm (22a), and a first left and right torque spring (33) is provided on one side of the spring support shaft (32). ) On the other side 2nd left and right torque spring 34) and the left and right linkage parts (33a, 33b, 34a, 34b) are extended upward at a predetermined interval, and the spring linkage arm (22a) has a movable pin ( 36) is mounted, and the spring linking arm (22a) is disposed in the space between the left and right linking portions (33a, 33b, 34a, 34b) of the first left and right torque springs (33) and the second left and right torque springs (34). A fixed pin (37) and an adjustment pin (38) having a large diameter are provided along the front-rear direction at a position below the movable pin (36) of the frame portion (21), and the fixed pin (37) is disposed in the space between the left and right linkage portions (33a, 33b) of the first left and right torque spring (33) with a space equal to the left and right interposed, and the peripheral surface of the adjustment pin (38) is Left and right linkage portion of the 2 lateral torque spring (34) (34a, 34b) and agricultural work vehicle operating device being characterized in that disposed in contact with the spacing of.

  According to the above configuration, in the small left / right rotation operation region of the operation lever 11, the steering lever 11 is rotated and steered to the left / right while receiving the pressing action of only the first left / right torque spring 33, and then in the large left / right rotation operation region, While receiving the pressing action of the second left and right torque springs 34 in addition to the first left and right torque springs 33, it is turned and steered left and right.

  According to the present invention, when the left and right operations of the operation lever 11 are performed, the left and right operation weights are sequentially increased while the left and right operation amounts are matched with the operation weights, and the operational feeling can be improved, and the work efficiency is improved by improving the operability. be able to.

Hereinafter, embodiments of the present invention shown in the drawings will be described.
First, the overall structure of a combine equipped with the present invention will be described with reference to FIGS. FIG. 1 is an overall side view of the combine, and FIG. 2 is a plan view thereof.

  Left and right traveling crawlers 2 and 2 are arranged below the traveling vehicle body 1 of the combine. On the traveling vehicle body 1, a steering unit 3 with a seat on the right front is provided, and an engine (not shown) and a grain are disposed behind the vehicle. A grain storage grain tank 4 is disposed, a threshing portion 5 is disposed on the left side of the traveling vehicle body 1, and a cutting and conveying portion 7 is provided on the front side portion of the traveling vehicle body 1 so as to be movable up and down. Further, a waste treatment device 8 is provided behind the threshing unit 5 and the Glen tank 4.

  As shown in FIG. 3, the control unit 3 is provided with a seat 3a on the rear side, a front operation box 3b in front of the seat 3a, and a side operation box 3c on the left side. A power steering lever (operation lever) 11 is provided at the right end of the front operation box 3b, and a monitor display 12 is provided at the front. The side operation box 3c includes a switch and a switch panel 13 for displaying on / off of the switch from the front side to the rear side, an accelerator lever 14 for adjusting the fuel injection amount of the engine, a continuously variable transmission (not shown), a main transmission lever for shifting. 15. Sub transmission (not shown) A sub transmission lever 16 for shifting and a mowing and threshing clutch lever 17 are provided.

  The power steering lever 11 steers the advancing direction of the airframe or raises and lowers the cutting and conveying section 7. When the power steering lever 11 is rotated in the left-right direction, the left-right brake device is adjusted according to the amount of rotation operation. (Not shown) is operated to correct the traveling direction to the left and right. Moreover, when the power steering lever 11 is rotated forward, the cutting and conveying section 7 is lowered, and when the power steering lever 11 is rotated backward, it is configured to be raised.

Next, a specific configuration of the power steering lever 11 will be described with reference to FIGS. 4 and 5.
The lower portion of the operating body 22 is pivotally supported by the frame portion 21 at the right end of the front operation box 3b so as to be rotatable in the left-right direction by the front-rear direction shaft 23. The power steering lever 11 is pivotally supported on the upper portion of the operating body 22 so as to be pivotable in the front-rear direction by a left-right shaft 24. A brake valve 26 is provided on one side of the frame portion 21 and provided in the left and right traveling conduction paths. The left and right brake devices are configured to operate. Thus, when the power steering lever 11 is rotated left and right around the longitudinal axis 23, the spool of the brake valve 26 is operated via the brake linkage device 27, the left and right brake devices are operated, and the airframe is steered left and right. It is configured.

  In addition, a lifting valve 28 for raising and lowering the cutting conveyance unit 7 is provided on one side of the operating body 22, and when the power steering lever 11 is rotated back and forth about the left and right axis 24, the lifting valve 28 is connected via the lifting and lowering linkage device 29. The spool is actuated to supply and discharge hydraulic pressure to an elevating cylinder (not shown), and the cutting and conveying unit 7 is raised and lowered. Further, a front / rear torque spring 31 is wound around the left / right shaft 24, one end of the front / rear torque spring 31 is locked to the operating body 22, and the other end is locked to the lifting / lowering linkage device 29. It is configured to return to the direction neutral position.

  Further, the spring linking arm 22a extends downward from the lower portion of the operating body 22, and the frame portion 21 is provided with a spring support shaft 32 along the front-rear direction at a lower portion of the spring linking arm 22a. A first left and right torque spring 33 is wound on one side, and a second left and right torque spring 34 is wound on the other side. The first left / right torque spring 33 performs a neutral position return action in the left / right operation area close to the neutral position of the power steering lever 11, and the second left / right torque spring 34 performs a neutral position return action in the left / right operation area far from the neutral position. Is.

  A small-diameter movable pin 36 is attached to the spring linking arm 22a along the front-rear direction, and the distance between the left and right linking portions 33a, 33b, 34a, 34b extending upward from the first and second left and right torque springs 33, 34. A movable pin 36 is arranged in the part.

  Further, a fixed pin 37 in the front-rear direction is disposed in parallel with the movable pin 36 at a position below the movable pin 36 of the frame portion 21. 4B and 5B, the screw portion 37a on one end side of the fixing pin 37 is screwed into and attached to the screw hole 21a of the frame portion 21, and the fixing pin 37 is attached to the fixing pin 37. A large-diameter portion 37b and a small-diameter portion 37c are provided, and the fixing pin 37 is pivotally adjusted and attached to the frame portion 21 around the axial center, whereby the left and right linkage portions 33a and 33b of the first left and right torque spring 33 are left and right. The same size space can be formed.

  Further, a large-diameter adjustment pin 38 having a circular cross section is screwed and attached to the screw portion 37a of the fixing pin 37, and the peripheral surface of the adjustment pin 38 is attached to the left and right linkage portions 34a and 34b of the second left and right torque spring 34. The left and right intervals between the left and right linkage portions 34a and 34b of the second left and right torque spring 34 are set wider than the left and right intervals between the left and right linkage portions 33a and 33b of the first left and right torque spring 33.

  According to the above configuration, the left and right linkage portions 33a and 33b of the first left and right torque spring 33 are abutted and supported by the movable pin 36 on the power steering lever 11 side, and the movable pin 36 is connected to the wide left and right linkage of the second left and right torque spring 34. By opposing the portions 34a and 34b while forming a space equal to the left and right, the power steering lever 11 is rotated while receiving the pressing action of the first left and right torque springs 33 in the small left and right rotation operation region. When the left and right large rotation operation region is entered, the rotation operation is performed while receiving the pressing action of the second left and right torque springs 34 in addition to the first left and right torque springs 33, and the operation load is sequentially increased in the left and right directions. The feeling can be improved.

  Further, the fixing pin 37 is pivotally adjusted and set on the frame portion 21, and the peripheral surfaces of the large diameter portion 37 b and the small diameter portion 37 c of the fixing pin 37 are set to the left and right linkage portions 33 a, By forming a space of the same size on the left and right in 33b, the peripheral surface of the movable pin 36 comes into contact with the left and right linkage portions 33a and 33b of the first left and right torque spring 33, and the play can be eliminated.

Next, the fuel tank 71 disposed below the rear part of the swing sorting shelf 58 of the threshing unit 5 will be described with reference to FIGS.
A handling cylinder 51 is mounted on the handling chamber 50 by a handling cylinder shaft in the front-rear direction. A large number of teeth 51a are attached to the outer peripheral surface of the handling cylinder 51, and a lower outer periphery of the handling cylinder 51 is covered with a receiving net 52. ing. A second processing chamber 53 with a second processing cylinder 53a is provided on the right front side of the handling chamber 50, and a dust processing chamber 54 with a dust processing cylinder 54a is provided on the right rear side. Yes. A feed chain (not shown) is provided on the left side of the handling chamber 50.

  In addition, a sorting unit 55 is disposed from the lower side to the rear side of the handling chamber 50, and the sorting wind is sent from the tang 56 on the front side of the sorting unit 55 toward the rear side of the sorting air channel 57. A swing sorting shelf 58 is provided, and is configured to swing back and forth obliquely up and down in the front-rear direction.

  The upper portion of the swing sorting shelf 58 is configured with a rough sorting portion including a Glen pan 59, a Glen sheave 60, a chaff sheave 61, and a Strollac 62 from the front side to the rear side. From the front side to the rear side, a fine sorting unit composed of a lower grain pan 63 and a lower grain sieve 64 of the mesh body is configured. Thus, the threshing processed material falling from the handling chamber 50, the dust removal processing chamber 54, and the second processing chamber 53 is received by the swing sorting shelf 58, and is subjected to specific gravity sorting while swinging and transferring to the rear side.

  The first receiving rod 65 with the first spiral 65 a is provided at the bottom front side of the sorting air passage 57, and the second receiving rod 66 with the second spiral 66 a is provided at the bottom rear side, and the rear end of the sorting air passage 57 A dust exhaust fan 67 is disposed at the upper left part of the rear end of the swing sorting shelf 58 in the section, and the light wastes that are sent to the rear side while being sorted on the swing sorting shelf 58, and the dust processing chamber It is configured so that the light sawdust discharged from 54 is sucked and discharged out of the apparatus.

  A fuel tank 71 is disposed on the lower right side of the second receiving rod 66 of the swing sorting shelf 58. The front lower inclined surface portion 71a of the upper front side of the fuel tank 71 is disposed close to the rear inclined surface of the second receiving rod 66, the rear upward inclined surface portion 71b is formed in the lower rear portion, and the fuel supply pipe 71d is provided. It extends from the rear side of the right side surface to the right side so as to be inclined upward.

  A front side portion of the fuel tank 71 is covered with a front tank cover 72f, and an intermediate portion and a rear side portion are covered with a rear tank cover 72r. The divided front tank cover 72f is inclined downward to cover the front side of the fuel tank 71, and the rear tank cover 72r has a flat plate portion and a rear side that cover an intermediate portion of the fuel tank 71. These are constituted by rearwardly inclined portions covering the portions, and these are attached to the rear side portion of the traveling vehicle body 1 and the rear portion of the frame of the threshing portion 5 so as to be detachable by bolts and nuts.

  Further, the front end of the seal cover 73 is attached to the rear upper part of the second receiving rod 66 of the swing sorting shelf 58, the rear side is extended rearward, and the rear end of the swinging seal cover 73 is moved forward. The tank cover 72f is attached to the rear end portion of the tank cover 72f and the front end portion of the rear tank cover 72r with bolts and nuts. Further, a dustproof cover 74 is provided on the front side of the seal cover 73 and hangs between the rear inclined plate of the second receiving rod 66 and the front tank cover 72f, and dust from the swing sorting shelf 58 to the fuel tank 71 is dropped. It prevents the scattering of the kind.

  According to the above configuration, since the cover of the fuel tank 71 is divided into the front and rear tank covers 72f and 72r, the fuel tank 71 can be removed rearward by removing only the rear tank cover 72r. . Further, since the front lower inclined surface portion 71a is formed on the upper front side of the fuel tank 71, the wastes can be guided to flow downward and accumulation of the wastes can be prevented. Further, even if the second item overflows from the second receiving rod 66 backward, it flows on the rear tank cover 72r to the rear side by the swinging seal cover 73, and between the second receiving rod 66 and the fuel tank 71. It is possible to prevent clogging.

Next, the automatic body horizontal control of the combine will be described with reference to FIG.
Connected to the input side of the controller 81 are a vehicle body horizontal automatic switch SW1 for turning on and off the vehicle body automatic horizontal control device, a cutting height potentiometer 83 for detecting the raising / lowering position of the cutting and conveying unit 7, and a wetland switch SW2. . A vehicle body horizontal valve solenoid 84 is connected to the output side of the controller 81, and a vehicle body horizontal rolling valve and a vehicle body horizontal pitching valve (not shown) are operated to expand and contract the rolling cylinder and the pitching cylinder 85.

  According to the above configuration, when the vehicle body horizontal automatic switch SW1 is turned on, the vehicle body automatic horizontal control device starts up, and when the aircraft tilts in a wetland or the like, the inclination in the left-right direction and the front-rear direction is automatically corrected to the horizontal state. Control to return is performed.

  Further, during the automatic body horizontal control, the lifting height potentiometer 83 detects the raising and lowering position of the cutting and conveying unit 7, and when the cutting and conveying unit 7 rises above a predetermined height, the automatic body leveling control is stopped.

  If the vehicle body is tilted due to inertia while turning on the shore during the harvesting operation of the combine, automatic horizontal control is performed to return the vehicle body to a horizontal position by the vehicle body automatic horizontal control device. Then, when starting the cutting operation with the cutting conveyance unit 7 after the turn is finished, when the vehicle body is returned to the horizontal state, the state may be different from the previous horizontal state, and the right and left cutting heights are different. May occur. However, according to the said structure, since the vehicle body automatic horizontal control is stopped at the time of the turning which raised the cutting conveyance part 7, such a malfunction can be eliminated and cutting efficiency can be improved, shortening turning time.

  Further, when the vehicle body horizontal automatic switch SW1 is turned on and the wet paddy switch SW2 is turned on, the stop of the vehicle body automatic horizontal control when the cutting and conveying unit 7 is lifted is released, and the vehicle body automatic horizontal control is executed. In this way, the vehicle body inclination during turning in the wet field is automatically corrected to a horizontal state, and the cutting work after the turning can be resumed smoothly.

Combine side view Top view of the combine Plan view of control section Side view of operation lever, side view of main parts Rear view of operation lever, front view of main parts Cutting side view of threshing section Rear view of threshing unit Fuel tank side view Control block diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 3 Steering part 3a Seat 3b Front operation box 3c Side operation box 7 Mowing conveyance part 11 Power steering lever (operation lever)
21 Frame portion 22 Actuator 22a Spring linkage arm 23 Front / rear shaft 24 Left / right shaft 32 Spring support shaft 33 First left / right torque spring 33a Left / right linkage 33b Left / right linkage 34 Second left / right torque spring 34a Left / right linkage 34b Left / right linkage 36 movable pin 37 fixed pin 38 adjustment pin

Claims (1)

  The operating body (22) is pivotally supported around the front-rear direction axis (23) on the frame portion (21) of the control section (3), and the operation lever (11) is supported on the operating body (22) by the left-right axis. (24) The shaft is pivotally supported around the axis and the operation lever (11) is rotated in the front-rear direction around the left-right axis (24) to raise and lower the cutting and conveying section (7). ) When the body is rotated in the left-right direction, the airframe traveling direction is steered left and right. The actuating body (22) is provided with a spring linking arm (22a) projecting downward, and the frame portion (21) is provided with the above-mentioned A spring support shaft (32) is provided along the front-rear direction so as to be positioned below the spring linkage arm (22a), and a first left and right torque spring (33) is provided on one side of the spring support shaft (32) on the other side. Wind the second left and right torque spring (34) around The left and right linkage portions (33a, 33b, 34a, 34b) extend upward at a predetermined interval, and a small-diameter movable pin (36) is attached to the spring linkage arm (22a) along the front-rear direction. The spring linking arm (22a) is disposed in the space between the left and right linking portions (33a, 33b, 34a, 34b) of the first left and right torque springs (33) and the second left and right torque springs (34), and the frame portion ( 21), a fixed pin (37) and a large-diameter adjusting pin (38) having an axially aligned state are provided along the front-rear direction at the lower part of the movable pin (36). The left and right linkage portions (33a, 33b) of the first left and right torque springs (33) are disposed with a space equal to the left and right interposed therebetween, and the peripheral surface of the adjustment pin (38) is disposed on the second left and right torques. Left and right linkage portion of the spring (34) (34a, 34b) agricultural work vehicle operating device being characterized in that disposed in contact with the spacing of.

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