JP2000110933A - Moving agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve transmission accuracy of main shift operation and steering operation by arranging a transmission under a side column, and transmitting the operation to a steering column from the side column through a main shift operation lateral transmission member arranged in the lateral direction of a machine body and a main shift operation longitudinal transmission member arranged in the longitudinal direction of the machine body. SOLUTION: A transmission 22 is arranged under a side column. A main shift shaft 99 being the main shift operation input part from the side column is rotatably journalled to the lower front side of a steering column 71, and the left side end of the main shift shaft 99 is projected to the left side outside of the steering column 71. The main shift shaft 99 is connected to a countershaft 100 being a main shift operation lateral transmission member arranged under the side column through a rod 104 with a length adjusting turnbuckle 103. With this constitution, three members of the steering column 71, the side column and the transmission 22 mounted with a turning HST 28 and a rectilinearly advancing HST 25 can be closely arranged to thereby improve transmission accuracy of main shift operation and steering operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a combine for continuously cutting and threshing grain culm in a field.

[0002]

2. Description of the Related Art Conventionally, harvesting work has been performed while traveling along a row of uncut culms in a field using a combine equipped with left and right traveling crawlers, and the direction of the combine has been changed at a field headland. Although it was moved to the uncutted culm row in the process, the left and right traveling output of the transmission case that transmits the engine output at a variable speed is transmitted to the left and right traveling crawler via the left and right side clutches, and the left and right side clutch is disconnected and operated to travel left and right By temporarily stopping and turning one of the crawlers, it is necessary for the operator to perform both the left and right side clutch operations and the traveling speed change operation at approximately the same time, and the turning radius when turning in the field headland There was a problem that became large. Therefore, by providing left and right hydraulic continuously variable transmissions that individually transmit the power of the engine and driving the left and right traveling crawlers, deceleration during turning and reduction of turning radius can be easily performed, but straight running performance tends to decrease, There was a problem that the steering operation for traveling along the uncut culm row became troublesome. Also, by providing a single hydraulic continuously variable transmission mechanism that transmits the engine power to the left and right traveling crawlers and a hydraulic continuously variable steering mechanism that decelerates the traveling crawler inside the turning and increases the speed of the traveling crawler outside the turning, Although the straight running performance can be maintained well and the turning radius can be easily reduced, there is a problem that the turning radius is increased by increasing the traveling speed, or the turning radius is decreased by decreasing the traveling speed. For example, in order to obtain a steering feeling that keeps the turning radius substantially constant irrespective of the traveling speed as in a four-wheeled vehicle, for example, during a traveling shift operation, the operator sensibly changes the steering operation amount according to a change in the traveling speed. There is a problem in handling such as making it easy to separate from an uncut culm row or uncultivated land or a crop ridge by meandering during agricultural work performed by straight traveling. In particular, when a round steering wheel is provided, the steering performance can be improved while maintaining a constant traveling speed, as compared with a steering structure having left and right side clutches and left and right side clutch levers. There is a problem that it is not easy to perform steering with a driving feeling of a four-wheeled vehicle, and it is not easy to improve driving operability such as traveling shift operation and steering operation and improvement of steering function. . Therefore, the applicant has applied a differential mechanism for transmitting the driving force of the engine to the left and right traveling crawlers, a speed change member for changing the driving speed of the left and right traveling crawlers in a stepless manner, and a stepless change in the driving speed of the left and right traveling crawlers. In a mobile agricultural machine provided with a steering member, a steering input shaft rotated by a steering operation tool, a speed change input shaft rotated by a speed change operation tool, a speed change mechanism connecting the speed change input shaft to the speed change member, and a steering input shaft The steering mechanism is connected to the steering member, and the steering mechanism steering amount is changed in proportion to the speed change mechanism operation amount. The steering amount is automatically reduced by the side running shift, and the turning radius of the left and right running crawlers is maintained substantially constant regardless of the running speed by a certain amount of operation of the steering operation tool, and the farm work running speed is changed. Crops such as a column in the path modification be along the body and have developed easily performed technique.

[0003]

In short, the above-mentioned technology is characterized in that the steering column in front of the driver's seat has a steering operation output unit for turning HST, a main shift operation input unit from a side column on the driver's seat side, and a straight ahead. A main shift operation output unit for the HST is provided, and the main shift operation is not directly transmitted to the straight HST, but is input to the steering column once and the H
The steering operation amount is changed in proportion to the main shift operation amount input by the internal mechanism of the steering column, and the steering operation is transmitted to the turning HST. A main transmission operation transmitting member for transmitting a shift operation to the steering column, and a main transmission operation transmitting member and a steering operation transmitting member for transmitting the main transmission operation and the steering operation from the steering column to the straight-ahead HST and the turning HST. A long operation transmission member is required,
Unless the main transmission operation and the steering operation can be properly transmitted using these operation transmission members, a desired function cannot be obtained.

Accordingly, the present invention provides a mobile agricultural machine capable of properly transmitting the main speed change operation from the side column to the steering column and the main speed change operation and the steering operation from the steering column to the straight HST and the turning HST. It is intended to be.

[0005]

According to a first aspect of the present invention, there is provided a mobile agricultural machine having a round steering wheel type steering column in front of a driver's seat and a steering operation output unit for turning HST. In a mobile agricultural machine provided with a main speed change operation input portion from a side column and a main speed change operation output portion to a straight-forward HST, a mission mounting each of the HSTs is disposed below the side column, and a main shift is performed in a lateral direction of the machine. A main transmission operation lateral transmission member forming a transmission operation transmission path and a main transmission operation vertical transmission member having an adjustable length forming a main transmission operation transmission path in the longitudinal direction of the machine, and a main transmission operation lateral transmission member from a side column; The main shift operation is transmitted to the main shift operation input portion of the steering column outside the driver's seat side of the side column via the main shift operation vertical transmission member. With this, the transmission column, the steering column, the side column, the HST for turning and the HST for straight ahead are arranged closer than before, the transmission distance of the main shift operation and the steering operation is shortened, and the transmission accuracy of these operations is improved. , That is, the main shift operation and the steering operation accuracy are increased. In addition, the mission and the dust cover of the transmission unit prevent the transmission members of the main shift operation and the steering operation and the other internal mechanism of the side column from adhering mud and dust, and reduce the transmission accuracy of the main shift operation and the steering operation. cut back. Further, the main shift operation is transmitted from the side column to the steering column in the same direction as the operation direction, thereby increasing the transmission accuracy of the main shift operation, that is, increasing the main shift operation accuracy. In addition, maintenance of the main transmission operation transmission system from the side column to the steering column can be easily performed from the driver's seat side, and this is always maintained in an appropriate state, and the transmission accuracy of the main transmission operation is increased, that is, the main transmission operation accuracy is increased.

In addition, the support frame of the side column is connected to the HST mounting seat to the transmission, and the input side end of the main transmission operation lateral transmission member is supported by the HST mounting seat. The side end is supported by the chassis frame. By this, the main shift operation section and the operated section are supported by an integral structure, and the main shift operation lateral transmission member, which is a fulcrum of the main shift operation system from the side column to the steering column, is also provided with the main shift operation section. The operating portion is supported by an integral structure that supports the operating portion, so that the support rigidity of the main speed change operation system is increased, and the transmission accuracy of the main speed change operation is increased, that is, the accuracy of the main speed change operation is increased. The side column is also connected to the chassis frame that supports the steering column, so that the steering column, side column, and turning HST
And the transmission equipped with the HST for straight running is integrally supported, the support rigidity of both the main transmission operation system and the steering operation system is increased, and the transmission accuracy of the main transmission operation and the steering operation is increased, that is, the main transmission Increase the accuracy of operation and steering operation.

Further, a steering operation transmitting member having an adjustable length, which forms a steering operation transmitting path between the steering operation output section of the steering column and the turning HST, a main speed change operation output section of the steering column, and straight ahead. A main transmission operation transmission member having an adjustable length that forms a main transmission operation transmission path between the transmission and the HST, and a main transmission longitudinal transmission on a lower surface side of a detachable step plate that is stretched forward and downward in the driver's seat. A member, a steering operation transmission member, and a main speed change operation transmission member are provided, and a length adjusting portion of each transmission member is provided on a lower surface side of the step plate. As a result, the main transmission operation transmission member from the side column to the steering column and the turning HST from the steering column
The lengths of the steering operation transmission member and the main transmission operation transmission member to the HST for straight traveling can be easily adjusted, the main transmission operation system and the steering operation system can be appropriately formed, and maintenance can be easily performed. Maintain the proper state at all times and increase the transmission accuracy of the main shift operation and the steering operation, that is, increase the accuracy of the main shift operation and the steering operation.

Further, the driver's seat side wall of the side column is formed so as to be freely opened and closed. As a result, maintenance of the steering operation input unit, main transmission operation input unit, main transmission operation unit, and other side column internal mechanisms of the turning HST and the straight traveling HST on the upper side of the mission can be easily performed from the driver's seat side, and these are always performed. Maintain the proper state and increase the transmission accuracy of the main shift operation and the steering operation, that is, increase the accuracy of the main shift operation and the steering operation. Further, the length adjustment of the steering operation transmission member and the main transmission operation transmission member from the steering column to the turning HST and the straight traveling HST is performed by the steering operation input portion and the main transmission operation input portion of the turning HST and the straight traveling HST. It can be performed properly while visually checking the condition, the main shift operation system and the steering operation system can be formed properly, and maintenance can be easily performed, and these are always kept in the proper state, the transmission accuracy of the main shift operation and steering operation , That is, the main shift operation and the steering operation accuracy are increased.

[0009] The term "HST" as used herein is defined as
Hydraulic drive (hydro-static trans)
This means that power is transmitted using hydraulic pressure. The hydraulic pump is first driven by an engine, the generated pressure oil is guided to a hydraulic motor, and power is transmitted. The speed is adjusted by changing the amount of oil using a variable displacement pump comprising a swash plate and a plunger.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. Fig. 1 is an overall side view of the combine, Fig. 2
Is a plan view of the same, in which (1) is a track frame on which a pair of left and right traveling crawlers (2) are mounted, (3) is a chassis frame installed on the track frame (1),
(4) A threshing unit in which a feed chain (5) is stretched to the left and a handling drum (6) and a processing drum (7) are built in, (8).
Is a cutting unit including a cutting blade (9) and a culm transport mechanism (10), (11) is a hydraulic cylinder that moves the cutting unit (8) up and down through a cutting frame (12), and (13) is a straw chain. (14) A straw processing unit that faces the end, (15) is a grain tank that carries in the grains from the threshing unit (4) through a fryer (16), and (17) is a grain tank. A discharge auger for taking out grains outside the machine, (18) a driving operation unit including a round steering handle (19) and a driver's seat (20), and (21) an engine provided below the driver's seat (20) It is configured so that the culm is continuously cut and threshed.

Further, as shown in FIG. 3, a mission (22) for driving the traveling crawler (2) includes a pair of first crawlers.
A straight HST (25), which comprises a hydraulic pump (23) and a first hydraulic motor (24) to form a hydraulic continuously variable transmission mechanism for traveling main speed, a pair of second hydraulic pumps (26) and A hydraulic HST (28) that forms a hydraulic hydraulic continuously variable transmission mechanism with a two-hydraulic motor (27), and a first and a second hydraulic pump on an output shaft (21a) of the engine (21). (23) Input shafts (29a) and (26) (29)
b) are connected by transmission belts (30a) (30b) to drive the hydraulic pumps (23) (26).

An output shaft (31) of the first hydraulic motor (24) is provided with an auxiliary transmission mechanism (32) and a differential mechanism (3).
3) through the driving wheels (3) of the left and right traveling crawlers (2).
The differential mechanism (33) has a pair of left and right symmetric planetary gear mechanisms (35) and (35), and each planetary gear mechanism (35) has one sun gear (36).
, Three planetary gears (37) meshed on the outer periphery of the sun gear (36), and a ring gear (38) meshed with the planetary gears (37).

The planetary gear (37) is rotatably supported on a carrier (41) of a carrier shaft (40) on a coaxial line with a sun gear shaft (39) so as to be rotatable, and sandwiches left and right sun gears (36) and (36). The left and right carriers (41) are arranged to face each other, and the ring gear (38) has internal teeth (38a) meshing with each planetary gear (37) and is arranged on the same axis as the sun gear shaft (39). The carrier shaft (4) is rotatably supported on the shaft (40).
0) is extended to form an axle to support the drive wheel (34).

The HST for straight traveling (25) controls forward / reverse rotation and rotation speed of the first hydraulic motor (24) by adjusting the angle of the rotary swash plate of the first hydraulic pump (23). The rotation output of the first hydraulic motor (24) is
Each gear (43) (44) from the transmission gear (42) of 1)
The sun gear (36) is configured to be transmitted to a center gear (46) fixed to the sun gear shaft (39) via the (45) and the auxiliary transmission mechanism (32) to rotate the sun gear (36). The sub-transmission mechanism (32) is provided with a sub-transmission shaft (47) having the gear (44) and a center gear (4) via the gear (45).
6) a parking brake shaft (4) having a gear (48) meshing therewith;
9), the auxiliary transmission shaft (47) and the brake shaft (49).
A pair of low speed gears (50) (51), medium speed gears (52) (53), and high speed gears (54) (48) are provided between the low speed gear (55) and the high speed slider (55). (56)
The low speed, the medium speed, and the high speed of the subtransmission are switched by the sliding operation of the sub speed. Note that there is neutrality between low and medium speeds and between medium and high speeds. The brake shaft (4
9) A parking brake (57) is provided, and a cutting PTO shaft (58) for transmitting a rotational force to the cutting unit (8) is connected to a sub-transmission shaft via gears (59) and (60) and a one-way clutch (61). (47) are connected, and the mowing part (8) is driven at the vehicle speed tuning speed.

As described above, the driving force from the first hydraulic motor (24) transmitted to the sun gear shaft (39) via the center gear (46) is applied to the left and right planetary gear mechanisms (35).
And to the left and right carrier shafts (40) via
The rotation transmitted to the left and right carrier shafts (40) is transmitted to the left and right drive wheels (34), respectively, to drive the left and right traveling crawlers (2).

Further, the turning HST (28) is controlled by changing the angle of the rotary swash plate of the second hydraulic pump (26).
The hydraulic motor (27) controls forward and reverse rotations and the number of rotations, and includes a brake shaft (63) having a steering output brake (62) and a clutch shaft (65) having a steering output clutch (64). The left and right input gears (66) (6) that always mesh with the external teeth (38b) of the left and right ring gears (38).
7), the output shaft (68) of the second hydraulic motor (27)
The brake shaft (63) and the steering output clutch (6)
4), the clutch shaft (65) is connected thereto, and the right input gear (6) is connected to the clutch shaft (65) via the forward rotation gear (69).
7), and the left input gear (6) is connected to the clutch shaft (65) via a forward gear (69) and a reverse gear (70).
6) are connected. Then, the sub-transmission slider (5
5) The brake (62) is turned on and the clutch (64) is turned off by the neutralization of (56), while the brake (62) is turned off and the clutch (64) is turned on at the time of output of a sub-shift other than the neutral. The motor (2) is connected to the external teeth (38b) of the right ring gear (38) via the forward gear (69).
7) The torque is transmitted, and the forward gear (69) and the reverse gear (70) are transmitted to the external teeth (38b) of the left ring gear (38).
When the second hydraulic motor (27) is rotated forward (reverse rotation), the left ring gear (38) is rotated reversely (forward rotation) and the right ring gear (38) is rotated at the same rotational speed in the left and right directions. ) Is rotated forward (reverse rotation).

The second hydraulic motor for turning (27)
When the first hydraulic motor (24) for straight traveling is driven in a state where the left and right ring gears (38) are stationary and fixed, the rotation output from the first hydraulic motor (24) is The right and left traveling crawlers (2) are transmitted to the sun gear (36) at the same rotation speed, and driven by the same rotation speed in the same left and right rotation directions via the planetary gear (37) and the carrier (41) of the left and right planetary gear mechanism (35). Then, the aircraft travels straight in the front-rear direction. On the other hand, when the first hydraulic motor (24) for straight traveling is stopped and the left and right sun gears (36) are stationary and fixed, the second hydraulic motor (27) for turning is driven forward and reverse to rotate the left planetary gear. The gear mechanism (35) rotates forward or reverse, and the right planetary gear mechanism (35) rotates reversely or forward, driving the left and right traveling crawlers (2) in the reverse direction, and turning the body left or right. In addition, by driving the second hydraulic motor for turning (27) while driving the first hydraulic motor for straight traveling (24), the body turns right and left and the course is corrected. The turning radius is determined by the output rotation speed of the second hydraulic motor (27).

Further, as shown in FIG. 2, FIG. 4 to FIG. 13, a steering column (71) is erected and fixed on the front upper surface of the driving operation part (18), and the steering column (71) is operated upwardly. The steering wheel (19) is provided rotatably about the vertical axis, a side column (72) is provided on the left side of the operation unit (18), and the transmission (22) is provided below the side column (72). Lever (7
3), the auxiliary transmission lever (74), the reaping clutch lever (7)
5) A threshing clutch lever (76) and the like are provided on the side column (72). The steering column (71) is formed by molding an aluminum alloy casting and has a plurality of bolts (7
It is fastened in 7) to form a box.

A tilt base (78) is integrally formed on the upper part of the steering column (71).
To the tilt bracket (8) via the fulcrum bolt (79).
0) is rotatably supported, and the tilt bracket (80) is fixed by the tilt lever (81) so that the angle can be freely adjusted. A shaft case (8) is attached to the tilt bracket (80).
2) A shaft case (82) is extended above an upper cover (83) for fixing the lower part integrally and fixed to the upper surface of the column (71), and the upper handle shaft (84) is rotatable inside the shaft case (82). The steering handle (19) is fixed at the upper end of the upper handle shaft (84), and the handle (19) is moved and adjusted around the fulcrum bolt (79) by operating the tilt lever (81) to a fixed position. And the handle (19) mounting position is adjusted in the front-rear direction to be fixed at a position where the operator can easily operate.

Further, the upper end of the lower handle shaft (86) is connected to the lower end of the upper handle shaft (84) via a universal joint (85), and the lower handle shaft (86) is mounted on the upper part of the steering column (71). In addition to being rotatably supported, the upper end of the steering input shaft (87) is rotatably supported above the steering column (71), and the gear (88) of the lower handle shaft (86) and the steering input shaft (87). ) Is engaged with each other to connect the shafts (86) and (87), and the steering input shaft (87) is extended vertically at substantially the center of the inside of the steering column (71).

Further, the steering column (71)
A bearing portion (90) is integrally formed on the left side surface at substantially the middle in the vertical direction, and one end of the transmission input shaft (91) is rotatably supported by the bearing portion (90) via a bolt (92) in a cantilever manner. The transmission input shaft (91) is supported substantially horizontally in the left-right direction, and the lower end of the steering input shaft (87) is connected to the upper end of the input fulcrum shaft (94) via a universal joint (93). (94) The lower end is rotatably supported on the speed change input shaft (91). A steering input member (95) is fixed to the upper end side of the input fulcrum shaft (94), and a transmission input member (9) is provided between the upper surface of the transmission input shaft (91) and the lower surface of the steering input member (95).
6), a transmission input member (96) is rotatably mounted around the input fulcrum shaft (94), and the input members (96) are removably fixed to the transmission input member (96) by a linkage bolt (97). 95) and (96), and both ends of a pinch spring (98) provided on the speed change input shaft (91) are locked to the speed change input member (96), and the speed change input member (9) is locked.
6) is supported by the spring (98) at the straight traveling neutral position. Further, the input members (95) and (96) are rotated forward and reverse around a substantially vertical axis of the input shaft (87) against a spring (98) by forward and reverse rotation of the steering input shaft (87). By rotating the speed change input shaft (91) forward and reverse, the input fulcrum shaft (9
4) and the input members (95) and (96) are tilted in the front-rear direction, and the center line of the vertical steering input shaft (87) and the center line of the left and right horizontal shift input shaft (91) intersect at right angles. A universal joint (93) is attached to the intersection, and the input members (95) (9) are rotated around the center line of the steering input shaft (87) by a forward / reverse operation of the steering input shaft (87) of the steering handle (19).
6) is reversed.

Further, the steering column (71)
A left end of a main transmission shaft (99) that rotatably supports a main transmission shaft (99), which is a main transmission operation input portion from a side column (72), in a lower front portion of the main transmission shaft and extends substantially horizontally in the left-right direction. Is projected outward on the left side of the steering column (71), and a link (10) is connected to a middle shaft (100) which is a main transmission operation lateral transmission member provided below the side column (72).
1) The main transmission shaft (99) is connected via a rod (104) with a length adjustment turnbuckle (103), which is a vertical transmission member for the main transmission operation whose length can be adjusted.
Also, the lever fulcrum shaft (10
5) A fulcrum plate (106) is rotatably mounted on the fulcrum plate (106) via a cylinder shaft (107).
3) Attach the base so as to be swingable in the left-right direction, and connect the center shaft (100) to the fulcrum plate (106) via the links (108) and (109), and move the main transmission lever (73) to the lever fulcrum shaft ( 105) The main transmission shaft (99) is rotated forward / reverse by a speed change operation for swinging forward and backward. Also,
The rod-type main transmission member (110) and the upper and lower links (11
1) The main transmission shaft (99) is connected to the transmission input shaft (91) via (112), and the input member (95) (95) ( 9
6) is tilted back and forth around the center line of the transmission input shaft (91).

Further, a cylindrical steering output shaft (113) is rotatably mounted on the main transmission shaft (99), and the link steering output member (114) is fixed to the steering output shaft (113). At the same time, the upper end of the rod-shaped steering connecting member (115) is connected to the steering input member (95) via a universal joint-type steering input connecting portion (116), and a ball joint type steering output connecting portion. The lower end of the steering coupling member (115) is connected to the steering output member (114) via (117) to constitute a steering mechanism (118) for changing the traveling course.

Further, a speed change output shaft (119) is rotatably supported inside the steering column (71) substantially parallel to the steering output shaft (113) above the steering output shaft (113),
The link type shift output member (120) is connected to the shift output shaft (11).
9) and a rod-shaped speed change coupling member (12).
The upper end of 1) is connected to the speed change input member (96) via a universal joint type speed change input connection portion (122), and the speed change coupling member (1) is connected via a ball joint type speed change output connection portion (123).
21) is connected to the shift output member (120) at the lower end thereof,
A speed change mechanism (1) that changes the traveling speed and switches between forward and reverse
24).

Further, the inner speed change operation shaft (125) and the outer steering operation shaft (12) of the double shaft structure rotatable with respect to each other.
6) is rotatably mounted on a bearing (127) in the center of the left and right widths at the lower rear side of the steering column (71).
The variable speed output shaft (11) is connected via a ball joint shaft (128) and a variable speed link (129) (130) whose length is adjustable.
9), the upper end portion of the speed change operation shaft (125) is connected, and the steering output shaft (11) is connected via a ball-and-joint shaft (131) and steering links (132) and (133) whose length is adjustable.
The upper end of the steering operation shaft (126) is connected to 3).

The operating shafts (125) and (126)
Are set up on the bottom of the steering column (71) substantially vertically on the same axis, and the upper ends of the operation shafts (125) and (126) are extended inside the steering column (71), and the output shafts (113) ( 119) and each operating shaft (125) (12) below the bottom of the steering column (71).
6) The operating shaft (12) is provided on the lower surface side of the operator's cab (18) on the step board (134)
5) (126) The trunnion arm (136) is fixed to the first trunnion (135), which is the main speed change operation input portion of the straight-ahead HST (25), by extending the lower end side, and the steering column (71) And HST for straight ahead (2
5) a length-adjustable rod (1) with a turnbuckle (137), which is a main speed change operation transmission member whose length is adjustable between
38) and a link (139), a trunnion arm (136) is connected to the lower end portion of the speed change operation shaft (125), which is the main speed change operation output portion of the steering column (71), so that the first trunnion (135) is positive. The swash plate angle of the first hydraulic pump (23) is adjusted by the reverse rotation operation to control the rotation speed of the first hydraulic motor (24) and to switch between forward and reverse rotations, thereby continuously changing the traveling speed (vehicle speed) and switching between forward and backward traveling. I do.
A trunnion arm (14) is connected to a second trunnion (140), which is a steering operation input unit of the turning HST (28).
1) is fixed, and a length-adjustable rod (143) with a turnbuckle (142), which is a steering operation transmission member whose length is adjustable between the steering column (71) and the turning HST (28), and a link. The trunnion arm (141) is connected to the lower end of the steering operation shaft (126), which is the steering operation output unit of the steering column (71), via the (144), and the second trunnion (140) is rotated by the forward / reverse operation. (2) The swash plate angle of the hydraulic pump (26) is adjusted to control the rotation speed of the second hydraulic motor (27) and to switch between forward and reverse rotations, thereby continuously changing the steering angle (turning radius) and switching between the left and right turning directions. Do.

Further, the steering column (71)
An accelerator lever (145) is provided on the outer surface on the right side of the engine so as to be rotatable in the front-rear direction.
An accelerator wire (146) for connecting the engine (2) is extended from below along the inside of the front surface of the steering column (71), and the engine (2) is operated by an accelerator lever (145).
1) The number of revolutions is manually adjusted, a maintenance window (147) is opened on the rear surface of the steering column (71), and the maintenance window (147) is closed by a removable lid (148).

Further, as shown in FIGS. 14 and 15, a phase adjusting hole (14) through which the connecting bolt (97) is loosely inserted.
9) is set up in the steering input member (95), and a plurality of (three) screw holes (150) are provided on the same radiation centering on the core of the steering input shaft (87), and the radiation input The phase adjustment hole (149) is formed in a trapezoid whose bottom is the steering input shaft (87) side. When the steering handle (19) in the straight-ahead position is rotated left and right, the screw hole (1) is formed.
Until the linking bolt (97) fixed to (50) comes into contact with the edge of the phase adjusting hole (149), the steering input is held in a state where the speed change input member (96) is fixed at a fixed position by the sandwiching spring (98). The course is corrected by rotating only the member (95) and turning left and right while keeping the traveling speed substantially constant. When the link bolt (97) comes into contact with the edge of the phase adjustment hole (149), the steering handle (19) is further rotated in the same direction to connect the link bolt (97) to the steering input member. (95) and shift input member (96)
Both rotate against the spring (98) to correct the course while reducing the traveling speed, and the steering handle (19)
The turning radius determined by the operation and the deceleration amount of the traveling speed change in proportion to each other, and by returning the steering handle (19) to the straight traveling position, the shift input member (96) is neutralized by the pinch spring (98). It returns to its original position and automatically returns to its original running speed. Further, by replacing the linking bolt (97) with each screw hole (150), the phase adjusting hole (1) is changed.
49) The rotation angle of the steering input member (95) until the link bolt (97) abuts on the edge changes, and the steering handle (1)
9) When the deceleration start timing of the traveling speed by the operation can be adjusted and the steering handle (19) is supported straight,
The speed change input member (96) is fixed to the speed change input shaft (91) by the sandwiching spring (98), and prevents the speed change input member (96) from floating due to mechanical vibration or the like. The running speed is prevented from decelerating and changing.

Further, as shown in FIGS. 16 to 20, the gear (88) has a plurality of teeth (1) in an outer peripheral range of 270 degrees.
51) is formed, an outer peripheral range of 90 degrees is formed in an arc (152), the total rotation angle of the steering handle (19) is set to 270 degrees, and the angle of left steering rotation or right steering rotation is set to 135 degrees. The steering wheel (19) is set so that the operator can easily perform the rotation operation with one hand. Further, the sector gear (89) has a plurality of teeth (153) in an outer peripheral range of 130 degrees.
Is formed on the circular cam (154), and the teeth (151) of the gear (88) and the teeth (153) of the sector gear (89) are engaged with each other to form the gears (88) (8).
At the time of the maximum forward / reverse rotation of 9), the stoppers (155) at both ends of the arc (152) and the stoppers (156) at both ends of the arc cam (154) are brought into contact with each other to regulate the rotation of the steering handle (19). The steering input member (95) and the speed change input member (96) are rotated forward or backward in the range of 65 degrees around the center line of the steering input shaft (87), and the speed is shifted on a plane where each input member (95) rotates. The input shaft (91) and the main transmission member (1
10) A structure in which a space for arranging the upper end portion is secured, and the steering input connecting portion (116) is provided on the core line of the transmission input shaft (91), and the input connecting portions (116) on the same circumference.
(122) can be easily obtained at a 90-degree distance, and the structure can be made compact, and the design and assembly can be simplified.

A straight notch (157) is formed at the center of the arc cam (154) of the sector gear (89), and a detent shaft (158) is rotatably supported on the upper surface wall of the steering column (71). Detent axis (15
8) A detent arm (159) is fixed to the lower end, a detent roller (161) is rotatably supported on the detent arm (159) via a roller shaft (160), and the detent roller (161) is attached to the arc cam (154). The detent roller (161) is removably engaged with the straight notch (157), and the steering handle (19) is supported at the straight position. Further, a detent lever (162) is fixed to the upper end side of the detent shaft (158), and one end of a neutral spring (163) wound around the detent shaft (158) is locked to the detent lever (162), and the steering column (162) is fixed. The other end of the neutral spring (163) is brought into contact with the receiving plate (164) of (71), and the detent roller (161) is attached to the circular cam (154) and the linear notch (157) by the neutral spring (1).
63). Further, a microswitch-type straight-ahead sensor (165) for electrically detecting the straight-ahead position of the steering handle (19) by switching on and off is attached to the detent lever (162).

When the main shift lever (73) is in the neutral position, the forward (reverse) operation of the steering handle (19) causes each of the input members (9) to rotate around the center line of the steering input shaft (87).
5) (96) and the coupling members (115) (121) move on a conical trajectory, and the output members (114) (12)
0) and the state in which the output shafts (113) and (119) are stopped.

The forward (reverse) operation of tilting the main transmission lever (73) forward (rearward) causes the input members (95) and (96) to move forward (rearward) around the center line of the transmission input shaft (91). While maintaining the state in which the inclination and the steering input connection (116) are stopped at a fixed position, the speed change input connection (12)
2) is moved upward (downward) and the transmission output member (12
0) Upward (downward) swing of the transmission output shaft (119)
Is rotated forward (reverse rotation), and the first hydraulic motor (24) is rotated forward (reverse rotation) by switching the swash plate angle of the first hydraulic pump (23) of the straight-forward HST (25).
The right and left traveling crawlers (2) are driven forward (reverse) by the forward rotation (reverse rotation) of the output shaft (31). Further, the rotation speed of the output shaft (31) changes in proportion to the tilt angle of the main transmission lever (73), and the forward (reverse) speed of the traveling crawler (2) is continuously changed.

Further, when the main shift lever (73) is tilted forward (rearward) to perform a forward (reverse) operation,
By rotating the steering handle (19) leftward (rightward), the steering input member (95) is tilted forward (rearward) around the center line of the transmission input shaft (91). 87) Forward rotation (reverse rotation) around the core line, the steering input connecting portion (116) moves downward (upward), and the steering output member (1
14), the steering output shaft (11
3) is rotated forward (reversely), and the second HST (28) for turning is rotated.
By switching the swash plate angle of the hydraulic pump (26), the second hydraulic motor (27) is rotated forward (reversely), and the second hydraulic motor (2) is rotated.
7) The forward rotation (reverse rotation) of the output shaft (68) causes the left traveling crawler (2) to decelerate (increase) and the right traveling crawler (2) to increase (decrease) to the left (to the right). ) And turn the aircraft to correct the course to the left (right). Also,
Simultaneously with the course correction operation, by turning the steering handle (19) to the left (rightward), the shift input member (96) is steered forward (rearward) around the center line of the shift input shaft (91). The input shaft (87) rotates forward (reverse) around the center line, the shift input connecting portion (122) moves downward (upward), and the shift output member (120) swings down (upward) to output the shift output shaft ( 119) is reversed (forward rotation), and the HST (2
5) The control to return to the neutral direction is performed to reduce the rotation speed of the output shaft (31) and reduce the traveling speed (vehicle speed). In this way, by turning the steering handle (19) left and right during the traveling movement, the turning radius (angle) for correcting the course and the deceleration of the traveling speed are proportional to the rotation angle of the steering handle (19). When the steering wheel (19) is rotated greatly, the speed difference between the left and right traveling crawlers (2) is increased to reduce the turning radius, and at the same time, the traveling speed is increased and the vehicle speed is decreased. At the same time, the movement of the turning input connecting portion (116) is made reverse to the rotation of the steering handle (19) between forward movement and reverse movement, and the rotation of the steering handle (19) in both forward and backward movements. The operation direction and the turning direction of the aircraft are made coincident, and the turning operation of the circular steering handle (19) for turning operation enables the correction of the course and the change of direction with the same driving feeling as a four-wheeled vehicle such as a tractor or a rice transplanter. Cormorant.

FIGS. 19 and 20 show the relationship between the turning angle of the steering handle (19) and the speed of the left and right traveling crawlers (2) when the body turns left and right.
The greater the angle of cut of 9), the greater the speed difference between the left and right traveling crawlers (2), and the average center speed of the left and right traveling crawlers (2) is also the traveling speed (high speed / standard / low speed). It is decelerated according to. When the steering handle (19) in the straight traveling position is rotated leftward (rightward) by about 15 degrees,
A linking bolt (97) moves in the phase adjusting hole (149), and a shift input member (96) is moved by a holding spring (98).
Is maintained at the same position as the straight ahead, and the turning HST
(28) The second hydraulic pump (26) is turned leftward (rightward) by the steering output to rotate the second hydraulic motor (27) forward (reverse), and the uncut culm (crop) row is curved. Make a course correction to match. At this time, the amount of deceleration of the traveling crawler (2) inside the turning is substantially equal to the amount of acceleration of the traveling crawler (2) outside the turning, and the center speed of the machine is maintained at substantially the same speed as the straight traveling. Further, when the steering handle (19) is rotated by 15 degrees or more from the straight traveling position, the pinch spring (9) is rotated.
8), the speed change input member (96) decelerates in both left and right turns, reduces the speed change output of the first hydraulic pump (23) and the motor (24), and moves the left and right running crawlers (96). 2) is rotated in the same direction to move forward (or backward), and a brake turn operation of turning leftward (rightward) due to a difference in traveling speed of the left and right traveling crawlers (2) is performed. ) Make a course correction to return to the original row or move to the next row when you get out of the row. further,
When the steering handle (19) is rotated by about 135 degrees, the center speed of the fuselage is reduced to about one-fourth of that when traveling straight, and the traveling crawler (2) inside the turning is driven in reverse, and the traveling crawler (2) inside the turning is driven. ) Is performed, and the body turns around, and the body turns 180 degrees by shifting in the turning direction by the left and right widths of the left and right traveling crawlers (2), and the steering angle is changed from 0 to 135 degrees. Rotate the steering handle (19) in the left or right direction by turning the steering wheel (19) in the range, and along the row of uncut culms (crops) in the handle (19) rotation range of 15 degrees left and right centering on the straight traveling position The traveling alignment is corrected while maintaining the traveling speed at the time of straight traveling, and the body is turned on the field headland by turning the steering wheel (19) left and right by 135 degrees from the straight traveling position to move to the next work process. The spin turn operation to performed automatically decelerated to the first speed of about 4 minutes during straight.

Further, when the sub-shift is maintained at the standard speed (1.5 m / s) and the steering handle (19) is rotated by 90 degrees, the main shift output (73) is operated by the main shift lever (73) to increase the main shift output to 3 minutes. Even if the turning radius is changed to one-third and one-third, only the turning speed (aircraft center speed) is changed while the turning radius of the airframe is kept substantially constant. Further, the first hydraulic pump (23) and the first hydraulic motor (24) are maintained in the straight traveling state within the setting range of the link bolt (97) and the phase adjusting hole (149) based on the straight traveling position, so that the crop row or the Prevents the running speed from changing non-uniformly even if the steering operation is performed along the ridge, etc., making it possible to correct the course during agricultural work while maintaining approximately the same running speed. And the appropriate steering operation can be performed by substantially matching the running operation of the vehicle. The sub-transmission lever (74) for switching the transmission reference value of the main transmission lever (73) changes the turning radius from a small diameter to a large diameter in proportion to the low-speed, standard and high-speed switching of the sub-transmission operation. 23) setting of the reduction ratio between the motor (24) and the traveling crawler (2) and the reduction ratio between the second hydraulic pump (26) and the motor (27) and the traveling crawler (2);
Alternatively, while ensuring the traveling driving force necessary for the small radius turning required for the spin turn operation, the turning radius is maintained substantially constant by operating the main shift lever (73) at the same sub-shift operation position. By changing the traveling speed at the time of turning, the driving operation can be performed according to the skill of the worker, and the mobility and the driving operability can be improved.

As described above, the differential mechanism (33) for transmitting the driving force of the engine (21) to the left and right traveling crawlers (2).
A straight HST (25) for continuously changing the driving speed of the left and right traveling crawler (2), and a turning HS for continuously changing the driving speed of the left and right traveling crawler (2).
In the mobile agricultural machine provided with T (28), the steering operation tool (1
A steering input shaft (87) rotated by 9) and a shift input shaft (91) rotated by a shift operating tool (73).
A transmission mechanism (124) for connecting the transmission input shaft (91) to the transmission member (25); and a steering mechanism (118) for connecting the steering input shaft (87) to the steering member (28). The speed change mechanism (124) The steering mechanism (11
8) The steering amount is changed, that is, the steering column (71) in front of the driver's seat (20) together with the steering operation output unit (126) to the turning HST (28) is provided on the driver's seat (20) side. A main speed change operation input portion (99) from the side column (72) and a main speed change operation output portion (125) to the straight HST (25) are provided, and the main speed change operation is directly transmitted to the straight HST (25). Instead, the steering operation amount is input once to the steering column (71) and transmitted to the straight-ahead HST (25), and the steering operation amount is proportional to the main shift operation amount input by the internal mechanism of the steering column (71). By changing the steering operation and transmitting the steering operation to the turning HST (28), the steering amount is automatically expanded by the high-speed running shift, and the steering amount is automatically reduced by the low-speed running shift. The turning radius of the left and right traveling crawlers (2) is maintained substantially constant irrespective of the traveling speed by a certain amount of operation of the direction steering wheel (19), and it is possible to change the traveling speed of the agricultural work and to correct the course so that the aircraft follows the crop line, etc. It is configured to be easily performed.

As shown in FIGS. 21 to 41, a body-length steering column (71) provided with a steering handle (19).
The lower end portion is fixedly supported between the front end sides of the left and right chassis frames (3a) extending to the lower left and right side portions of the driving operation section (18).
Step plates (134) are provided on the left and right sides of the bottom of the driving operation unit (18) between the driver and the driver's seat (20) and the lower part of the steering column (71). By placing both feet, the front and rear length of the driving operation unit (18) is reduced, and the overall length of the body is reduced.

Further, the lateral width of the left step plate (134) of the steering column (71) is formed to be wider than the lateral width of the right step plate (134), and the space between the steering column (71) and the side column (72) is increased. And a sufficient space for placing the left foot of the worker on the steering column (71) and the step plate (134) on the left side of the steering column (71).
Overhanging the reaper (8) to the reaper (8)
In order to prevent the cover on the right side of the mowing part (8) from interfering with the step plate (134) when the is lifted to the highest position, the front part of the step plate (134) is formed so as to rise in an inclined manner. I have.

The step plate (134) includes front left and right step portions (134a) (134b) on the left and right sides of the steering column (71), and a step body (134c) behind the steering column (71). And the front left and right step portions (134a) (134
b) is always fixed to the chassis frame (3a), the step main body (134c) is detachably attached to the chassis frame (3a), and the step main body (134c) is removed, so that maintenance of the structure on the lower surface side can be performed. It is configured so that it can be easily performed.

A fuel tank (200) is provided on the lower surface side of the step plate (134), and the chassis frame (3) is provided.
a) a fuel tank (200) is fixedly supported, and between the steering column (71) and the fuel tank (200), the speed change operation shaft (12) is moved from the steering column (71).
5) and the steering shaft (126) are protruded, the rods (138) and (143) are stretched between the step plate (134) and the fuel tank (200), and the turnbuckle (137) ( 142) is provided between the step plate (134) and the fuel tank (200), so that the speed change operation shaft (125) and the steering operation shaft (126) and the rods (138) (143) and the turnbuckle (137) are provided.
Adhesion of mud and dust to the fuel tank (142)
0) to reduce factors that reduce the transmission accuracy of the main shift operation and the steering operation.

Further, the main transmission shaft (99) is projected from the steering column (71) into an extra space on the lower surface side of the front left step portion (134a) formed by raising the front portion of the step plate (134). The main transmission shaft (99) is connected to the step plate (1) while reducing the size of the body.
34) and the chassis frame (3a) to protect the main transmission shaft (99) from externally applied impacts and the like, and to reduce factors that reduce the transmission accuracy of the main transmission operation.

The side column (72) includes a main transmission lever (73), an auxiliary transmission lever (74), a cutting clutch lever (75), a lever groove of a threshing clutch lever (76) and various switches, display lamps, display motors, and the like. , A side panel (72a) provided with a front panel, the side panel (72a) is fixedly supported on the upper surface side, and each lever (73) (74) (7)
5) The support frame structure (201) of the side column (72) for mounting the lever fulcrum shaft and the like of (76), and the side wall (20) extended to the driver's seat (20) side of the side column (72).
2), the main transmission lever (73) and the sub transmission lever (74) are provided to form a main transmission operation part and an auxiliary transmission operation part, and the side column (72) is operated by the driving operation part (18). ), And the mission (22) on which each HST (25) (28) is mounted is provided below the side column (72), that is, below the side panel (72a). The frame structure (201) is fixedly supported on the chassis frame (3a) which fixedly supports the steering column (71).

An HST mounting seat for mounting a turning HST (28) mounted on a front portion of the upper surface of the mission (22) and a straight HST (25) mounted on a rear portion of the upper surface of the mission (22) to the mission (22). (204), a predetermined gap is provided between the HST (28) for turning and the HST (25) for straight traveling, and each HST (25) (28) is placed inside the transmission belt (30a) (30b). In terms of mission (2
2), these three members are integrally connected, and the support column (205), which is integrally connected to the upper surface of the HST mounting seat (204) on the upper surface side of one HST (25), also has a side column ( The support frame structure (201) of (72) is fixedly supported.

The side wall (202) of the side column (72) is formed by a cover plate or the like so as to be openable and closable. It is configured so that it can be performed easily. A cover (2) extending forward from the front edge of the side wall (202) and extending on the left side of the left foot of the worker.
03) is provided.

As described above, the main speed change lever (73) includes the lever fulcrum shaft (105) attached to the support frame structure (201) of the side column (72) and the lever fulcrum shaft (10).
A fulcrum plate (106), which is rotatably supported by 5) and the base of a main transmission lever (73) is swingably movable in the left-right direction via a cylindrical shaft (107); and links (109), (10).
8), the center shaft (1) connecting the fulcrum plate (106)
00) and a link (102) (101) connecting the intermediate shaft (100) to the main transmission shaft (99) and a rod (104) with a length-adjustable turnbuckle (103). The main transmission shaft (99) is connected to the main transmission shaft (99), and the main transmission operation of the main transmission lever (73) is transmitted and input to the main transmission shaft (99).
0) to the side column (72)
A ball-and-joint joint (206a) fixed to a support seat (205) integrally connected to the upper surface of the lower HST mounting seat (204) is made to bear, and the main transmission shaft output end of the intermediate shaft (100) is The ball joint (206b) fixed to the chassis frame (3a) on the lower surface side of the step plate (134) on the right side of the side column (72) is supported.
0) is properly supported in the lateral direction of the fuselage between the transmission (22) part having different vibrations and the chassis frame (3a),
The main transmission operation is transmitted to the main transmission shaft (99) of the steering column (71) on the right outside of the side column (72) via the middle shaft (100) and the rod (104). In addition, friction plates (213) and (214) for holding the fulcrum plate (106) are provided on the lever fulcrum shaft (105), and the main shift lever (73) is operated and positioned. The detent force is adjusted by loosening the nut (215) and the spring (21).
6) Adjust the force.

A sub-transmission shifter shaft (207) as an auxiliary transmission operation input portion is provided on the front side of the transmission (22). A lever fulcrum attached to a support frame structure (201) of a side column (72) is provided. A cylindrical shaft (209) at the base of the auxiliary transmission shaft (74) is rotatably fitted to the shaft (208), and an auxiliary transmission arm (210) is mounted on the front side of the transmission (22) from the cylindrical shaft (209). The sub-transmission arm (210) is extended integrally with the sub-transmission shifter shaft (207) through a substantially vertical rod (211) and a link (212).
And the auxiliary transmission lever (74) is connected to the lever fulcrum shaft (2).
08) A speed change operation for swinging forward and backward is transmitted to the auxiliary speed change shifter shaft (207) on the front side of the transmission (22), and the auxiliary speed change shifter shaft (207) is rotated forward and reverse to switch the auxiliary speed change. It is configured as follows.

Further, the driving operation part (18) is provided with a parking brake pedal (217) and a parking brake lever (218), and the parking brake pedal (217) is moved between the steering column (71) and the side column (72). The parking brake lever (218) is provided at the front right side of the driving operation unit (18), and the parking brake lever (218) is provided at the front left side of the step board (134). A pedal fulcrum shaft (219) is laid horizontally on the upper side in the lateral direction of the fuselage.
The cylindrical shaft (22) fixedly supported on the chassis frame (3a)
0), the pedal fulcrum shaft (219) is rotatably attached to the pedal fulcrum shaft (2) on the right outside of the side column (72).
19), the base of the pedal arm (221) is engaged and supported
At the left end of the step plate (134), the pedal arm (2
21) extends forward, and the front left step portion (134a)
The parking brake pedal (217) is fixed to the tip of the upper pedal arm (221). On the other hand, the lever fulcrum shaft (222) is rotatably mounted on the cylindrical shaft (223) fixedly supported on the front end of the right chassis frame (3a), and the parking brake lever (218) base is engaged with the lever fulcrum shaft (222). Let it be pivoted.

A notch (224) in which the pedal fulcrum shaft (219) is formed at the rear lower edge of the side wall (202).
And an output arm (225), which is a parking brake operation output unit, is provided at a shaft end of a pedal fulcrum shaft (219) inside the side column (72). The parking brake arm (221) A lever fulcrum shaft (222) is connected via an operation wire (226) and a link (229) to the output arm (225) interlocked with the output arm (225), and a parking brake operation by depressing a parking brake pedal (217) and a parking brake lever ( 218) the parking brake operation by the tilting operation of the output arm (223).
To communicate.

The output arm (223) is urged with a return spring (228) and the side column (7
2) The support shaft (2) attached to the support frame structure (201)
29) a restraint operation plate (230) that is rotatably supported on the output arm (223);
Connecting member of link or rod with turnbuckle (2
31) and a parking brake shifter (23) on the left side of the mission (22) serving as a parking brake operation input unit.
2) to the restraint operation plate (23) via the operation wire (233);
0), the parking brake operation by depressing the parking brake pedal (217), and the parking brake lever (21).
The parking brake operation by the tilting operation of 8) is transmitted from the output arm (223) to the parking brake shifter (232), and the parking brake (57) is operated. In the figure, reference numeral (237) denotes an engagement rod for holding the parking brake pedal (217) at the depressed position.

When the parking brake (57) is applied,
A traction mechanism (233) for holding the main transmission lever (73) at the neutral position (when already at the neutral position) or returning and holding (when it is at a position other than the neutral position) is provided.
33) is a check roller (234) and a check roller (23).
4) A check plate (23) having a slot (235) for fitting therein.
6) and the above-mentioned restraint operation plate (230), the restraint roller (234) is mounted on the fulcrum plate (106) of the main speed change operation system, and the restraint plate (236) is incorporated in the parking brake operation system. Attach to (230) and parking brake (57)
When not applied, the large portion (235) of the slot (235)
a) A check roller (234) is positioned inside to allow the main shift operation, while a slot (23) is provided at the position of the check roller (234) when the main shift is neutral when the parking brake (57) is applied.
The movement of the restraining roller (234) from the neutral position or the movement of the restraining roller (234) from the neutral position after returning to the neutral position is controlled by moving the end of the small portion (235b) of 5). It is configured to be.

The parking brake operation is performed from the side column (72) to the parking brake (5) of the mission (22).
7) The operation wire (233) to be transmitted to the section is a straight traveling HS.
T (25) and the HST (28) for turning, it is stretched between the restraint operation plate (230) and the parking brake shifter (232), and is used for moving the HST mounting seat (204) straight. A hole (238) is opened at a position corresponding to a gap between the HST (25) and the turning HST (28), and the operation wire (233) is provided on the left side of the mission (22) from the inner side of the HST mounting seat (204). ) Through the transmission belt (30
a) The operation wire (233) is guided to the parking brake shifter (232) along the left side of the mission (22) inside (30b).

Further, a coaxial tension arm fulcrum (241) of the tension rollers (239) (240) of the transmission belts (30a) (30b) is mounted on the HST mounting seat (204).

Further, the chassis frame (3) (3a), the fixed object welded and fixed to the chassis frame (3) (3a), and the side column (72) are mounted on the mission (2).
2) is arranged outside the trajectory rotated about the axle (242) so that maintenance assembly and development can be easily checked. The supporting frame structure (2) of the side column (72) connected to the mission (22)
The fastening such as 01) uses an elongated hole (243) so as to cope with a positional deviation.

The main transmission from the side column (72) on the side of the driver's seat (20) together with the steering operation output part (126) to the steering column (71) in front of the driver's seat (20) and the turning HST (28). Operation input unit (99) and H for straight ahead
In a mobile agricultural machine provided with a main speed change operation output section (125) to the ST (25), the mission (22) mounting each of the HSTs (25) and (28) is connected to the side column (72).
Of the steering column (71), the side column (72) and the turning HST (2).
8) and a mission (22) equipped with a straight-forward HST (25) are arranged closer to each other than before so as to shorten the transmission distance of the main speed change operation and the steering operation and increase the transmission accuracy of these operations. That is, the accuracy of the main shift operation and the steering operation is increased. The transmission (22) and the dust-proof cover of the transmission unit prevent the transmission of the main shift operation and the steering operation and the other internal mechanisms of the side column from adhering mud and dust, thereby improving the transmission accuracy of the main shift operation and the steering operation. Reduce the factors that lower it. Further, a retraction mechanism (233) for holding or returning and holding the main shift lever (73) of the side column (72) at the neutral position when the parking brake (57) provided on the mission (22) is applied is provided. This prevents erroneous operation of the main speed change operation unit such as the main speed change lever (73) of the side column (72) when parking is stopped, and ensures that the main speed change operation unit is maintained at the neutral position when parking is stopped. Is transmitted to the steering column (71) to prevent the internal mechanism of the steering column from being damaged or the vehicle from running.

Further, by providing the restraint mechanism (233) inside the side column (72), it is possible to prevent the internal mechanism of the steering column from being further complicated. Also, as with the transmission member for the main speed change operation and the steering operation, the traction mechanism (23)
3) also prevents the adhesion of mud and dust with the mission (22) and the dust-proof cover of the mission unit, and the like, and the check mechanism (23).
3) The operation failure is prevented.

Further, a parking brake operation output section (225) is provided inside the side column (72), and the output section (22) is provided.
The parking brake operation wire (233) for transmitting the parking brake operation from 5) to the parking brake operation input section (232) provided on the side of the mission (22) is connected to the turning HST (2).
8) and the straight-forward HST (25), and is stretched between the parking brake operation output section (225) and the input section (232), whereby the parking brake operation wire (2) is extended.
33) is stretched without meandering much, the transmission distance of the parking brake operation is shortened, the compactness of the parking brake operation system and the transmission accuracy of the operation are increased, that is, the parking brake operation accuracy is increased.

The parking brake pedal (217) provided between the steering column (71) and the side column (72) is provided with a depressing operation of the parking brake pedal (217). A parking brake operation unit which is excellent in operability while achieving compactness is formed by effectively utilizing a space for placing one foot on the side column (72) side of an operator between the vehicle and the side column (72). Or side column (7
A parking brake operation unit that can be operated even by an operator who got off the aircraft is formed by giving the parking brake operation output unit (225) a tilting operation of the parking brake lever (218) provided on the outside of the aircraft opposite to 2). I do. Alternatively, by providing two systems of a parking brake operation system of the parking brake pedal (217) and the parking brake lever (218), a parking brake operation that can be operated regardless of whether the user is on or off the aircraft. Form a part.

The driver's seat (2) of the side column (72)
0) By forming the side wall (202) so as to be openable and closable, the steering operation input section (140) and the main speed change operation input section of the HST (28) and the HST (25) for turning on the upper side of the mission (22). (135) and maintenance of the main shift operation section, the parking brake operation system, and other side column internal mechanisms can be easily performed from the driver's seat (20) side, and these are always maintained in an appropriate state, and the main shift operation, steering operation, and parking are performed. The transmission accuracy of the brake operation is increased, that is, the main shift operation, the steering operation, and the parking brake operation accuracy are increased.

The main shift from the side column (72) on the side of the driver's seat (20) together with the steering operation output part (126) to the steering column (71) in front of the driver's seat (20) to the turning HST (28). Operation input unit (99) and H for straight ahead
In a mobile agricultural machine provided with a main speed change operation output section (125) to the ST (25), the mission (22) mounting each of the HSTs (25) and (28) is connected to the side column (72).
It is arranged below. Alternatively, the main shift operation input from the side column (72) on the side of the driver's seat (20) together with the steering operation output unit (126) to the steering column (71) in front of the driver's seat (20) and the turning HST (28). Section (99) and the main transmission operation output section (125) to the HST (25) for going straight,
The steering column (71), the side column (72) and the turning HST are arranged by disposing the side column (71) above the mission (22) on which the 8) is mounted.
(28) and a mission (22) equipped with a straight-moving HST (25) are arranged closer to each other than before so as to shorten the transmission distance of the main speed change operation and the steering operation and increase the transmission accuracy of these operations. That is, the main shift operation and the steering operation accuracy are improved. The transmission (22) and the dust-proof cover of the transmission unit prevent the transmission of the main shift operation and the steering operation and the other internal mechanisms of the side column from adhering mud and dust, thereby improving the transmission accuracy of the main shift operation and the steering operation. Reduce the factors that lower it.

Further, by connecting the HST mounting seat (204) to the transmission (22) and the support frame (201) of the side column (72), the operating portion (73) of the main transmission and the operated portion (135) are connected. Are supported by an integral structure, the support rigidity of the main speed change operation system is increased, and the transmission accuracy of the main speed change operation is increased, that is, the accuracy of the main speed change operation is increased. The side column (72) is also connected to the chassis frame (3a) supporting the steering column (71), so that the steering column (71), the side column (72), the turning HST (28) and the straight traveling HST (2
5) The mission (22) equipped with the 5) is integrally supported to increase the support rigidity of both the main speed change operation system and the steering operation system and to increase the transmission accuracy of the main speed change operation and the steering operation. Increase gear shifting and steering accuracy.

Further, an auxiliary speed change operation input portion (207) is provided on the front side of the transmission (22), and the auxiliary speed change operation from the side column (72) is transmitted on the front side of the mission (22), whereby the auxiliary speed change operation is performed. It is possible to prevent the operation system from hindering formation of a preferable main speed change operation system and steering operation system for improving transmission accuracy of the main speed change operation and the steering operation. On the other hand, the auxiliary speed change operation can be transmitted from the side column (72) to the auxiliary speed change operation input portion (207) of the mission (22) linearly up and down (vertically or substantially vertically). Since the operating part (74) and the operated part (207) are also supported by an integral structure, the transmission accuracy of the sub-transmission operation is increased, that is, the sub-transmission operation accuracy is increased, and the sub-transmission operation system is downsized. Attempt to simplify the internal structure of the side column.

The driver's seat (2) of the side column (92)
0) By forming the side wall so that it can be opened and closed, the HST (28) for turning and the H for straight traveling on the upper side of the transmission (22) are formed.
Maintenance of the steering operation input unit (140), main transmission operation input unit (135), main transmission operation unit, auxiliary transmission operation system, and other side column internal mechanisms in ST (25) is easily performed from the driver's seat (20) side. The transmission speed of the main speed change operation, the steering operation, and the auxiliary speed change operation is improved, that is, the accuracy of the main speed change operation, the steering operation, and the auxiliary speed change operation is improved. Further, a steering operation transmitting member (143) and a main speed change operating transmitting member (1) from the steering column (71) to the turning HST (28) and the straight traveling HST (25).
38) The length can be adjusted appropriately while visually checking the states of the steering operation input unit (140) and the main speed change operation input unit (135) of the turning HST (28) and the straight HST (25). The main shift operation system and the steering operation system are properly formed, and maintenance can be easily performed. The main shift operation system and the steering operation system are always kept in an appropriate state to improve the transmission accuracy of the main shift operation and the steering operation. Direction operation and sub-shift operation accuracy are improved.

The main transmission from the side column (72) on the side of the driver's seat (20) together with the steering operation output section (126) to the steering column (71) in front of the driver's seat (20) and the turning HST (28). Operation input unit (99) and H for straight ahead
In a mobile agricultural machine provided with a main speed change operation output section (125) to the ST (25), the mission (22) mounting each of the HSTs (25) and (28) is connected to the side column (72).
, A main transmission operation lateral transmission member (100) that forms a main transmission operation transmission path in the lateral direction of the vehicle, and a main transmission operation longitudinal length that can be adjusted in length to form a main transmission operation transmission path in the longitudinal direction of the vehicle. A transmission member (104) is provided and a side column (7
2) through the main transmission operation lateral transmission member (100) and the main transmission operation vertical transmission member (104) from the side column (72).
By transmitting the main speed change operation to the main speed change operation input portion (99) of the steering column (71) outside the driver's seat (20) side of the steering column (71), the steering column (71), the side column (72) and the turning HST (28). ) And HST for straight ahead
The transmission (22) equipped with the (25) is arranged closer to the conventional transmission, thereby shortening the transmission distance of the main shift operation and the steering operation, and improving the transmission accuracy of these operations, that is, the main shift operation and the operation. To increase the direction accuracy. The transmission (22) and the dust-proof cover of the transmission unit prevent the transmission of the main shift operation and the steering operation and the other internal mechanisms of the side column from adhering mud and dust, thereby improving the transmission accuracy of the main shift operation and the steering operation. Reduce the factors that lower it. Further, the main shift operation is transmitted from the side column (72) to the steering column (71) in the same direction as the operation direction, and the transmission accuracy of the main shift operation is increased, that is, the main shift operation accuracy is increased. Further, maintenance of the main transmission operation transmission system from the side column (72) to the steering column (71) can be easily performed from the driver's seat (20) side, and this is always maintained in an appropriate state to improve transmission accuracy of the main transmission operation. That is, the accuracy of the main shift operation is increased.

Further, the support frame (201) of the side column (72) is connected to the HST mounting seat (204) to the transmission (22), and the input side end of the main speed change operation lateral transmission member (100) is connected to the HST mounting seat (204). HST mounting seat (204)
, And the output side end of the main transmission operation lateral transmission member (100) is supported by the chassis frame (3a), whereby the main transmission operation part (73) and the operated part (135) are integrated. The main transmission operation lateral transmission member (100), which is a fulcrum of the main transmission operation system from the side column (72) to the steering column (71), is also supported by the main transmission operation part (73) and the operated part ( 135) is supported by an integral structure, which increases the rigidity of the main speed change operation system and increases the transmission accuracy of the main speed change operation, that is, increases the accuracy of the main speed change operation.
The side column (72) is connected to the steering column (7
The steering column (71), the side column (72), the HST (28) for turning, and the H for straight traveling are also connected to the chassis frame (3a) supporting the 1).
The three members of the mission (22) equipped with the ST (25) are integrally supported to increase the support rigidity of both the main transmission operation system and the steering operation system, and to increase the transmission accuracy of the main transmission operation and the steering operation. That is, the accuracy of the main shift operation and the steering operation is increased.

A steering operation transmitting member (143) having an adjustable length that forms a steering operation transmitting path between the steering operation output section (126) of the steering column (71) and the turning HST (28). ), A main speed change operation transmitting member (138), which can form a main speed change operation transmission path between the main speed change operation output portion (125) of the steering column (71) and the straight traveling HST (25). The main transmission operation vertical transmission member (104), the steering operation transmission member (143), and the main transmission operation transmission member (104) are provided on the lower surface side of a detachable step plate (134c) that is provided and stretched downward in front of the driver's seat (20). 138) and each transmission member (104) (143) (13)
8) By providing the length adjusting portions (103), (142) and (137) on the lower surface side of the step plate (134c), the steering column (7) can be moved from the side column (72).
HST (28) for turning and H for straight traveling from the main transmission operation transmitting member (104) and the steering column (71) to 1).
The length of the steering operation transmitting member (43) and the main transmission operation transmitting member (138) to ST (25) can be easily adjusted, the main transmission operation system and the steering operation system are appropriately formed, and maintenance is also performed. They can be easily performed, always keep them in an appropriate state, and increase the transmission accuracy of the main shift operation and the steering operation, that is, increase the accuracy of the main shift operation and the steering operation.

The driver's seat (2) of the side column (72)
0) By forming the side wall (202) so as to be openable and closable, the steering operation input section (140) and the main speed change operation input section of the HST (28) and the HST (25) for turning on the upper side of the mission (22). (135) and maintenance of the main shift operation section and other side column internal mechanisms can be easily performed from the driver's seat (20) side, always keeping them in proper state, and improving transmission accuracy of the main shift operation and the steering operation. That is, the accuracy of the main shift operation and the steering operation is increased. Further, the length adjustment of the steering operation transmission member (143) and the main speed change operation transmission member (138) from the steering column (71) to the turning HST (28) and the straight traveling HST (25) is performed by turning the HS for turning.
The state of the steering operation input unit (140) and the main transmission operation input unit (135) of the T (28) and the straight-ahead HST (25) can be properly performed while visually confirming the state. Properly formed and easy to maintain, these are always kept in an appropriate state, and the transmission accuracy of the main shift operation and the steering operation is increased, that is, the accuracy of the main shift operation and the steering operation is increased.

In a combine where a driving operation part (18) is arranged beside the mowing part (8) to be moved up and down, the front part of the step plate (134) of the driving operation part (18) is raised up in an inclined manner. A step plate (134) is provided on the side of the driver's seat (20) of the reaper (8) raised to the raised position.
To prevent interference with the steering column (71)
An operator's reaping section (8) between the side column (72) and
Enough space is provided for placing one foot on the side, and the front and rear length of the driving operation unit (18) is reduced, and the overall length of the aircraft is reduced, thereby achieving a more compact aircraft. Further, the front portion of the step plate (134), which is raised in an inclined manner, makes it easy to put both feet of the worker and stabilizes the working posture.

The driver's seat (2) of the driving operation unit (18)
0) A steering column (71) is erected in front, and a side column (72) is provided on the side of the mowing part (8) of the driving operation part (18), and the steering column (71) lower than the step board (134) is provided. HST (2) for turning
8) The main shift operation input unit (99) from the side column (72) together with the steering operation output unit (126) to the H
A main shift operation output unit (125) for ST (25) is provided,
A mission (22) on which a turning HST (28) and a straight traveling HST (25) are mounted is disposed below the side column (72), and a steering operation transmission path and a main A shift operation transmission path is formed, and the step plate (1) on the upper surface side of the steering operation transmission path and the main transmission operation transmission path is formed.
34c), the main shift operation system and the steering operation system are appropriately formed and maintenance can be easily performed, and these are always kept in an appropriate state, and the transmission accuracy of the main shift operation and the steering operation is provided. , That is, the main shift operation and the steering operation accuracy are increased.

The driver's seat (2) of the side column (72)
0) By forming the side surface so as to be freely opened and closed, the HST (28) for turning and the H
Maintenance of the steering operation input unit (140), main transmission operation input unit (135), main transmission operation unit, and other side column internal mechanisms in ST (25) can be easily performed from the driver's seat (20) side. Maintain the proper state at all times and increase the transmission accuracy of the main shift operation and the steering operation, that is, increase the accuracy of the main shift operation and the steering operation. In addition, the HST for turning (28) and the HST for going straight from the steering column (71)
The HST for turning is used to adjust the length of the steering operation transmitting member (143) and the main transmission operation transmitting member (138) to (25).
(28) and the state of the steering operation input unit (140) and the main speed change operation input unit (135) of the straight-forward HST (25) can be properly performed while visually confirming the state. In addition, maintenance can be easily performed, and these are always kept in an appropriate state, and the transmission accuracy of the main shift operation and the steering operation is increased, that is, the accuracy of the main shift operation and the steering operation is increased.

The main speed change operation is input to the space on the lower surface side of the front of the step plate (134) on the side of the steering column (71) on the side of the side column (72) formed by the rising of the front of the step plate (134). By providing the section (99), the main speed change operation input section (99) is provided by effectively using the surplus space, and this contributes to downsizing of the body.

[0071]

As is apparent from the above embodiment, the present invention provides a steering operation output unit (126) for turning HST (28) on a round handle type steering column (71) in front of the driver's seat (20). In addition, in the mobile agricultural machine provided with a main speed change operation input portion (99) from the side column (72) on the side of the driver's seat (20) and a main speed change operation output portion (125) to the straight-ahead HST (25). The mission (22) on which the HST (25) (28) is mounted is connected to the side column (7).
2) A main speed change lateral transmission member (100) disposed below the main body and forming a main speed change operation transmission path in the lateral direction of the machine, and a main speed changeable main speed forming a main speed change operation transmission path in the longitudinal direction of the machine. An operation vertical transmission member (104) is provided, and a side column (7) is provided from a side column (72) via a main transmission operation horizontal transmission member (100) and a main transmission operation vertical transmission member (104).
By transmitting the main shift operation to the main shift operation input portion (99) of the steering column (71) outside the driver's seat (20) side of 2), the steering column (71), the side column (72), and the turning HST are transmitted. (28) and HS for straight ahead
The transmission (22) equipped with the T (25) is arranged closer to the conventional one to shorten the transmission distance of the main speed change operation and the steering operation, and to increase the transmission accuracy of these operations, that is, to increase the transmission speed of the main speed change operation and the steering operation. Increase steering accuracy. The transmission (22) and the dust-proof cover of the transmission unit prevent the transmission of the main shift operation and the steering operation and the other internal mechanisms of the side column from adhering mud and dust, thereby improving the transmission accuracy of the main shift operation and the steering operation. Reduce the factors that lower it. Further, the main shift operation is transmitted from the side column (72) to the steering column (71) in the same direction as the operation direction, and the transmission accuracy of the main shift operation is increased, that is, the main shift operation accuracy is increased. Further, maintenance of the main transmission operation transmission system from the side column (72) to the steering column (71) can be easily performed from the driver's seat (20) side, and this is always maintained in an appropriate state to improve transmission accuracy of the main transmission operation. That is, the accuracy of the main shift operation is increased.

Further, the support frame (201) of the side column (72) is connected to the HST mounting seat (204) for the transmission (22), and the input side end of the main speed change operation lateral transmission member (100) is connected to the HST mounting seat (204). HST mounting seat (204)
, And the output side end of the main transmission operation lateral transmission member (100) is supported by the chassis frame (3a), whereby the main transmission operation part (73) and the operated part (135) are integrated. The main transmission operation lateral transmission member (100), which is a fulcrum of the main transmission operation system from the side column (72) to the steering column (71), is also supported by the main transmission operation part (73) and the operated part ( 135) is supported by an integral structure, which increases the rigidity of the main speed change operation system and increases the transmission accuracy of the main speed change operation, that is, increases the accuracy of the main speed change operation.
The side column (72) is connected to the steering column (7
The steering column (71), the side column (72), the HST (28) for turning, and the H for straight traveling are also connected to the chassis frame (3a) supporting the 1).
The three members of the mission (22) equipped with the ST (25) are integrally supported to increase the support rigidity of both the main transmission operation system and the steering operation system, and to increase the transmission accuracy of the main transmission operation and the steering operation. That is, the accuracy of the main shift operation and the steering operation is increased.

Further, a steering operation transmission member (143) having an adjustable length that forms a steering operation transmission path between the steering operation output section (126) of the steering column (71) and the turning HST (28). ), A main speed change operation transmitting member (138), which can form a main speed change operation transmission path between the main speed change operation output portion (125) of the steering column (71) and the straight traveling HST (25). The main transmission operation longitudinal transmission member (104), the steering operation transmission member (143), and the main transmission operation transmission member ( 138) and each transmission member (104) (143) (13)
8) By providing the length adjusting portions (103), (142) and (137) on the lower surface side of the step plate (134c), the steering column (7) can be moved from the side column (72).
HST (28) for turning and H for straight traveling from the main transmission operation transmitting member (104) and the steering column (71) to 1).
The length of the steering operation transmitting member (43) and the main transmission operation transmitting member (138) to ST (25) can be easily adjusted, the main transmission operation system and the steering operation system are appropriately formed, and maintenance is also performed. They can be easily performed, always keep them in an appropriate state, and increase the transmission accuracy of the main shift operation and the steering operation, that is, increase the accuracy of the main shift operation and the steering operation.

The driver's seat (2) of the side column (72)
0) By forming the side wall (202) so as to be openable and closable, the steering operation input section (140) and the main speed change operation input section of the HST (28) and the HST (25) for turning on the upper side of the mission (22). (135) and maintenance of the main shift operation section and other side column internal mechanisms can be easily performed from the driver's seat (20) side, always keeping them in proper state, and improving transmission accuracy of the main shift operation and the steering operation. That is, the accuracy of the main shift operation and the steering operation is increased. Further, the length adjustment of the steering operation transmission member (143) and the main speed change operation transmission member (138) from the steering column (71) to the turning HST (28) and the straight traveling HST (25) is performed by turning the HS for turning.
The state of the steering operation input unit (140) and the main transmission operation input unit (135) of the T (28) and the straight-ahead HST (25) can be properly performed while visually confirming the state. Properly formed and easy to maintain, these are always kept in an appropriate state, and the transmission accuracy of the main shift operation and the steering operation is increased, that is, the accuracy of the main shift operation and the steering operation is increased.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is an overall plan view of the combine.

FIG. 3 is an explanatory diagram of a mission drive system.

FIG. 4 is an explanatory perspective view of a traveling shift and steering operation unit.

FIG. 5 is an operation explanatory view of the same part.

FIG. 6 is a side view of a steering column.

FIG. 7 is an enlarged side view of the upper part.

FIG. 8 is an enlarged side view of the lower part.

FIG. 9 is a front view of a steering column.

FIG. 10 is an enlarged front view of the upper part.

FIG. 11 is an enlarged front view of the lower part.

FIG. 12 is an explanatory plan view of FIG. 4;

FIG. 13 is an enlarged view of FIG.

FIG. 14 is a cross-sectional view of a steering column.

15 is an exploded view of FIG.

FIG. 16 is a partial plan view of the upper part of the steering column.

FIG. 17 is a partial view of the same.

FIG. 18 is an operation explanatory view of FIG.

FIG. 19 is a diagram showing main speed change and steering handle operation.

FIG. 20 is a diagram showing sub-transmission and steering handle operation.

FIG. 21 is a right side view of a driving operation unit.

FIG. 22 is a left side view of the driving operation unit.

FIG. 23 is an enlarged side view of the upper part.

FIG. 24 is an enlarged side view of the lower part.

FIG. 25 is a side view of a side column.

FIG. 26 is a plan view of the same.

FIG. 27 is a front view of the same.

FIG. 28 is a side view of a main transmission operation system input unit.

FIG. 29 is a plan view of the same.

FIG. 30 is a front view of the same.

FIG. 31 is a plan view of a center shaft.

FIG. 32 is a side view of an output section of a main shift operation and steering operation system.

FIG. 33 is a plan view of the same.

FIG. 34 is a front view of the same.

FIG. 35 is a side view of an auxiliary speed change operation system.

FIG. 36 is a front view of the same.

FIG. 37 is a side view of a parking brake operation system.

FIG. 38 is a plan view of the same.

FIG. 39 is a front view of the same.

FIG. 40 is an enlarged side view of the restraint mechanism.

FIG. 41 is an enlarged side view of the upper part of the mission.

[Explanation of symbols]

(2) Traveling crawler (3) (3a) Chassis frame (8) Mowing part (18) Driving operation part (19) Steering handle (20) Driver's seat (21) Engine (22) Transmission (23) First hydraulic pump (24) First hydraulic motor (25) HST for straight traveling (26) Second hydraulic pump (27) Second hydraulic motor (28) HST for turning (47) Sub-transmission shaft (49) Parking brake shaft (57) Parking brake (71) Steering column (72) Side column (73) Main transmission lever (74) Sub transmission lever (99) Main transmission shaft (main transmission operation input section) (100) Middle shaft (main transmission operation lateral transmission member) (103) ) Turn back (104) Rod (main transmission operation vertical transmission member) (125) Shift operation shaft (main transmission operation output unit) (126) Steering operation shaft (steering operation output) ) (134) Step plate (135) First trunnion (main transmission operation input section) (137) Turnback (138) Rod (main transmission operation transmission member) (140) Second trunnion (142) Turnback (143) Rod (Steering operation transmission member) (202) Side column side wall (233) Checking mechanism (225) Output arm (parking brake operation output unit) (232) Parking brake shifter (parking brake operation input unit) (217) Parking brake pedal ( 218) Parking brake lever (204) HST mounting seat (201) Support frame structure (207) Sub-shift shifter shaft (sub-shift operation input unit) (233) Parking brake operation wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayoshi Miyoshi 428 Enami, Onami, Okayama Pref.Seirei Industry Co., Ltd. (72) Eiichi Kato 428 Enami, Onami, Okayama City, Okayama Pref. (72) Inventor Nobuyuki Irie 428 Enami, Okayama-shi, Okayama Pref. Inside (72) Inventor Akinori Kakizaki 428 Enami, Okayama-shi, Okayama F-term (reference) 2B043 AB04 AB06 AB11 BA02 BA05 BB14 DA04 DB01 DB18 EB01 EB13 EB14 2B074 AA02 AA04 AB01 AC02 AD04 AD05 AD06 AE01 AF02 AG03 BA04 BA18 CA01 CD08 DA01 DA02 DB03 DE03 DE07 DF03 EA14 EB02 EC03 EE06 FA10 FB01 GE05 FA10 FB01 3D040 AA01 AA22 AB04 AC27 AC50 AC51 AC56 AC65 AD02 AD05 AE11 AF07 3J067 AA02 AB01 AC12 AC42 AC51 BA54 BA56 BB07 CA24 DA01 DA06 DA22 DA24 FB61 FB81 GA14

Claims (4)

[Claims] 1. A main shift operation input section from a side column on a side of a driver seat and a main shift operation input to a HST for straight traveling together with a steering operation output section for a turning HST on a round steering wheel type steering column in front of a driver seat. In a mobile agricultural machine provided with an output unit, a transmission for mounting each of the HSTs is disposed below the side column, and a main transmission operation lateral transmission member that forms a main transmission operation transmission path in the lateral direction of the aircraft and a front-rear direction of the aircraft. A main transmission operation vertical transmission member having an adjustable length that forms a main transmission operation transmission path is provided, and the main transmission operation lateral transmission member and the main transmission operation vertical transmission member are provided from the side column to the outside of the side column on the driver seat side outside. A mobile farm machine for transmitting a shift operation to a main shift operation input portion of a steering column. 2. A side frame support frame is connected to an HST mounting seat for a transmission, and an input side end of a main transmission operation lateral transmission member is supported by the HST mounting seat. The mobile agricultural machine according to claim 1, wherein the side end is supported by a chassis frame. 3. A steering operation transmitting member having an adjustable length that forms a steering operation transmitting path between the steering operation output section of the steering column and the turning HST, a main speed change operation output section of the steering column, and straight ahead. And a main transmission operation transmission member having an adjustable length that forms a main transmission operation transmission path between the transmission and the HST. 3. The mobile agricultural machine according to claim 1, further comprising a member, a steering operation transmission member, and a main speed change operation transmission member, and a length adjusting portion of each transmission member provided on a lower surface side of the step plate. 4. The mobile agricultural machine according to claim 1, wherein the side wall of the driver's seat side of the side column is formed to be freely openable and closable.