JP2001299005A - Tending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect an operating rotary with an always appropriate rotary cover irrespective of a change in operation height of the operating rotary in a tending machine for installing the operating rotary therein. SOLUTION: This tending machine is obtained by freely rotatably installing side covers (64) in left and right side plates (26) of a rotary cover (25) for covering the upper side of the operating rotary (22) in the tending machine having the operating rotary (22) installed in a machine body provided with traveling wheels (1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking-type management machine for performing, for example, medium tillage or tillage work.

[0002]

Conventionally, when two or more different works such as mowing and tilling work are performed in one management machine, the distance between the work rotary and the field scene is different.
The cultivating claw is hidden by the rotary cover during tillage work when the working rotary is low above the ground, but the mowing claw is not sufficiently hidden by the rotary cover during mowing work with a high ground clearance, and the rotary cover alone cannot protect the mowing blade properly. There was a problem such as.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a management machine for equipping a body having running wheels with a work rotary, in which a side cover is rotatably provided on left and right side plates of a rotary cover that covers above the work rotary. When the rotary can not be properly protected only by the left and right side plates of the rotary cover, for example, during mowing work with a high working height (ground height) of the working rotary, the gap between the left and right side plates and the field is covered with a side cover, and the working rotary is removed. A good work properly protected by the rotary cover and the side cover is performed.

In addition, the shape of the side cover is formed in a sector shape,
The outer diameter of the side cover is set smaller than the outer diameter of the left and right side plates of the rotary cover, and during normal work that does not require the side cover such as tilling work, the side cover is stored in the shape of the left and right side plates of the rotary cover. Thus, the cover is prevented from becoming an obstacle during the work, and when the cover is necessary for the mowing work or the like, the cover is made to act most effectively to appropriately protect the work rotary.

In addition, the center of rotation of the side cover is provided at or near the center of rotation of the work rotary, so that when the cultivation work does not require the side cover, the right and left side plates of the rotary cover are compactly formed in a substantially semicircular shape. Along with storing,
When the side covers are required, the side covers are effectively projected from the left and right side plates along the arc outer diameter lines of the left and right side plates, thereby appropriately protecting the work rotary.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 to 5, a pair of left and right running wheels (1) are mounted on a transmission case (2) via an axle (3), and a hitch table (4) is fixed to the rear of the transmission case (2). , The base end of the steering handle (5) is connected to the hitch base (4) and the transmission case (2), and the steering handle (5) is provided diagonally above and behind the transmission case (2), and the shift lever (6), Attach the deadman lever (7), PTO clutch lever (8), differential lock lever (9), etc., which are the main clutch levers, to the loop-type operation part (10) of the steering handle (5), and at the top of the transmission case (2). Engine (1) on a substantially horizontal plane (11)
The hydraulic transmission (13) for continuously changing the output of the engine (12) is fixed to the right side of the rear part of the transmission case (2), and is fixed to the output shaft (14) of the engine (11). The input shaft (18) of the hydraulic transmission (13) is connected, and the pulleys (15) and (16) and the belt (17) are connected.
To the output shaft (19) of the transmission (13) via the axle (3)
Are connected.

Further, the transmission case (2) is formed substantially in the shape of an L when viewed from the side, and the rear side is projected downward, and an axle (3) is provided at a lower portion on the rear side of the transmission case (2). A transmission (13) is arranged between the output shaft (14) and the axle (3) of (11), and the driving force of the engine (11) is transmitted from above to the rear below to drive the traveling wheel (1). A PTO shaft (20) is arranged in front of the transmission (13) of the transmission case (2), and the rotary working machine (22) is supported in front of the body via the case (2) and the transmission case (21). ing.

The rotary working machine (22) has a rotary shaft (23) and a rotary blade (24), and is connected to the PTO shaft (20) via a transmission case (21).
3) A plurality of cutting rotary blades (24) used for tilling and mowing are attached to the rotary shaft (23), and the upper surface and left and right of each cutting rotary blade (24) are rotary covers (25) and left and right side plates. It is closed by (26), and the cultivation work is performed by rotating the cutting rotary blade (24) in reverse while the cutting rotary blade (24) rotates in the same direction as the traveling wheel (1) in the forward direction.

Further, a post-working machine (27) for performing the ridge work at the same time as the tilling work of the work machine (22) is provided, and the rear hitch (28) fixed to the rear side of the hitch table (4) is provided with a hitch pin (28). A rear work machine (27) is provided detachably via a rear hitch (28) while being rotatable around a hitch pin (29) while being freely removably mounted via the rear hitch (28).
The post-working machine (27) may be lowered and landed to support the ridge work position, or the post-working machine (27) may be lifted to the rear side of the hitch table (4) and supported at the non-working position. Further, a fuel tank (30) is provided on the rear side of the engine (11).

As shown in FIG. 6, a left and right gauge wheel (32) is attached by projecting both ends of a gauge frame (31) having a gate shape in a plan view to the front of a working machine (22), and a gate of the gauge frame (31). Connecting frame (33) fixed to the middle part of the shape
The screw shaft (36) at the front end of the adjusting handle (35) is connected to the connector (34) of the adjusting handle (3).
5) is arranged in the front-rear direction on the right side of the center line of the aircraft,
The rear end of the handle (35) is extended to a position below the steering handle (5), and the steering operation part (37) at the rear end of the handle (35) can be turned at the steering handle (5). Is provided. The gate-shaped support leg (31a) of the gauge frame (31) is formed substantially L-shaped in side view, and the support shaft (38) is attached to the left and right side plates (26) of the rotary cover (25).
The L-shaped corner portion of the supporting leg (31a) is held in contact with the rotating support (39) rotatably mounted through the upper portion from above, so that the support (3) can be rotated when the height adjustment handle (35) is rotated.
Swing the gauge frame (31) around 9),
The gauge wheel (32) is configured to move up and down.

A front cover (40) having a gate shape in a plan view is provided in front of the rotary cover (25). Both ends of the front cover (40) are fixed inside the front end of the support leg (31a). When adjusting the height of the gauge wheel (32) above the ground, the front cover (40) is also moved integrally with the gauge wheel (32). The work machine (22) is used for mowing work in which the front cover (40) is set at the raised position to avoid interference with the field scene, and the work machine (22) is raised.
For this purpose, the front cover (40) is set at the lowered position to prevent grass or pebbles from scattering toward the front of the work machine (22).

As shown in FIG. 5, the rotary shaft (23)
The claw base (41) is fixed to the claw base (41), and the support shaft (4)
The rotary blade (24) is rotatably supported via 2), and when the rotary shaft (23) rotates, the rotary blade (24) protrudes in the radial direction by centrifugal force, and the rotation around the support shaft (42) causes an impact. Blade (24) for absorbing water
When mowing is performed by high-speed reversal of the above, the retraction stopper (43) is fixed to the claw base (41), and when the rotary shaft (23) is rotated forward for plowing, the rotary blade (2) is used.
4) is brought into contact with the retraction stopper (43), the rotary blade (24) is fixedly supported in a backward inclined posture against the tilling resistance, and a retraction angle is formed via the retraction stopper (43) to form the rotary blade (24). ) Is supported so that the tillage force (depth) is secured while reducing the tillage resistance.

As shown in FIGS. 6 to 9, a working machine (22)
The work height switching member (44) for switching between the tillage and mowing height positions is connected to the middle of the height adjustment handle (35), and connects the transmission case (2) and the transmission case (21). The lower end of the switching member (44) is fixed to the shaft pipe (45) outside the PTO shaft (20), and the front end of the long hole (46) opened in the front-rear direction of the switching member (44).
Mowing, neutral, and tillage notch (47) (4)
8) When the handle (35) is formed and the both round shaft portions (50a) of the handle receiver (50) for inserting and fixing the handle (35) are engaged with the notches (47) and (49), the handle ( 35) is largely moved back and forth, and when the receiving body (50) and the mowing notch (47) are engaged, the gauge wheel (3) is engaged.
2) is set to the lowering position, and the gauge wheel (32) is steplessly changed to the lowering position by the turning operation of the handle operation part (37) so that the plowing depth of the working machine (22) is 1 cm. While performing low mowing work, high mowing work or moving work with a ground height of 30 mm or 40 mm, the gauge wheel (32) is raised when the receiver (50) and the tilling notch (49) are engaged. The working wheel (32) is moved to the moving position, and the gauge wheel (32) is steplessly changed to a small value in the upward moving position by the turning operation of the handle operation part (37) so that the working machine (22) has a working depth of 10 cm or 5 cm. It is configured to perform work and the like.

When the height adjustment handle (35) is switched between a mowing notch (47) and a tilling notch (49), the traveling speed change gear (5) in the transmission case (2).
1) and the work speed change gear portion (52) also change the speed at the same time, and the swing cylinder shaft (54) is rotated about the support shaft (53) located below the neutral notch (48) of the switching member (44). The switching plate (55) and the base ends of the swing arm (56) are fixed to the cylindrical shaft (54). The switching plate (5
5) is close to the switching member (44) and substantially parallel to the cylindrical shaft (5).
4) A lower base end is fixedly mounted on the lower groove, the upper end flat surface (55a) is aligned with the lower side surface of the long hole (46), and a substantially same neutral groove (57) is formed at the center so as to coincide with the neutral notch (48). And mowing and tilling notches (4) at both ends of the flat surface (55a)
7) Extend to the position (49), and when the round shaft (50a) of the handle (35) is engaged with the neutral notch (48), the neutral groove (57) of the switching plate (55) is also round shaft ( The switching plate (55) is maintained in a neutral position in which the flat surface (55a) is horizontal by engaging with the handle (35a) while the handle (35) is engaged with the mowing and tilling notches (47) and (49). Round shaft (3
5a) presses both ends of the flat surface (55a) to rotate the switching plate (55) right and left around the support shaft (53).

The swing shaft (5) is attached to a fixed support (57) below the switching member (44) of the shaft pipe (45).
A rocking plate (59) having a gate shape in a side view is provided to be able to swing left and right through 8), and one end of the rocking plate (59) and the rocking arm (56) are connected via a rod (60). The other end of the speed changeover switching rod (61) connected to the gear portions (51) and (52) is connected to the other end of the swing plate (59) via the engagement shaft (62). 59a), when the receiving body (50) of the handle (35) is positioned at the mowing and tilling notches (47) and (49) of the switching member (44), the rocking plate around the shaft (58) is used. The gears (51) and (52) are switched by swinging (59) and moving the switching rod (61) substantially horizontally in the left-right direction.

As shown in FIGS. 3 to 5, the lower part of the front side of the transmission case (2) is a rotary cover (25).
Is formed on an arcuate surface (2a) along the outer peripheral surface of the rotary cover (25), and the rear half of the outer peripheral surface of the rotary cover (25) is fixed to the arcuate surface (2a).
In 6), both ends of the rotary shaft (23) are supported to reduce the number of parts and the number of assembling steps, thereby reducing costs.

Further, a side cover (64) is attached to the outside of the side plate (26) via a bolt (63) so as to be detachable and rotatable about a rotary shaft (23). Is formed in a sector shape, the outer diameter of the arc outer periphery of the side cover (64) is set smaller than the outer diameter of the arc outer peripheral surface of the rotary cover (25), and an arc centered on the rotary shaft (23) is provided. Shaped two bolts (63)
A long hole (65) for the side cover (64) is opened in the side cover (64), and the side cover (6) is inserted through the long hole (65) and the bolt (63).
4) is attached to the side plate (26), and when the plowing work of the work machine (22) having a low ground clearance (working height) moving above the gauge wheel (32), for example, at the time of tilling work, the side cover ( 6
4) Move up to cover (64) in the shape of side plate (26).
On the other hand, when mowing work of the work machine (22) having a high ground clearance, which moves down the gauge wheel (32), the side cover (64) is moved down as shown by the solid line in FIG. The side cover (64) is protruded to cover the gap formed between the lower end of the side plate (26) and the field scene (64).
To protect the rotary blade (25).

As described above, in the management machine in which the body having the traveling wheels (1) is equipped with the rotary work machine (22) as the work rotary, the left and right side plates of the rotary cover (25) covering the work machine (22) above. (26) Side cover (6
4) is rotatably provided, and only when the right and left side plates (26) of the rotary cover (25) are used for mowing work in which the working height (ground height) of the working machine (22) is high, the rotary blade (2) is provided.
If 4) cannot be properly protected, the left and right side plates (26)
The working machine (22) is covered with the rotary cover (25) and the side cover (6) by covering the gap between the
4) and a good work properly protected can be performed.

The side cover (64) is formed in a sector shape, and the outer diameter of the side cover (64) is smaller than the outer diameter of the left and right side plates (26) of the rotary cover (25). During normal work that does not require the side cover (64), such as tilling work, the side cover (64) is stored in the shape of the left and right side plates (26) of the rotary cover (25), and the cover (64) is operated. The work implement (22) can be properly protected by preventing the obstruction from occurring during the operation, and when the cover (64) for mowing or the like is required, the cover (64) is made to act most effectively.

Further, the center of rotation of the side cover (64) is provided near the rotary shaft (23) or the rotary shaft (23) which is the center of rotation of the work machine (22), and the side cover (64) is required. In the case of tilling work, etc., the rotary cover (25) is compactly housed in the substantially semicircular shape of the left and right side plates (26), and when the side cover (64) is required, the outer diameter of the arc of the left and right side plates (26) is reduced. By properly projecting the side cover (64) from the left and right side plates (26) in a state along the side, appropriate protection of the working machine (22) can be achieved.

Further, an upper end of a rear cover (67) is rotatably attached to a rear end of the rotary cover (25) via a hinge (66), and a short rubber plate (up and down) is attached to a lower end of the cover (67). 68), the rear cover (67) rotates well to cope with a large change in the distance between the rotary cover (25) and the field scene, and shortens the vertical dimension of the rubber plate (68). This prevents the work implement (22) from being entangled.

As shown in FIGS. 10 and 11, a belt (1) for transmitting the output of the engine (14) to a transmission (13).
7) The deadman lever (7) for engaging and disengaging the main clutch (69), which is the tension clutch, via a clutch wire (70) and the differential lock for the differential mechanism (87) provided inside the transmission case (2). A differential lock lever (9) formed through a wire (71) is formed in a loop shape and provided on a loop-shaped operation portion (10) of a steering handle (5), and left and right outer sides of each lever (7) (9). The width is set smaller than the width on the left and right sides of the handle operation part (10), and the lever rotation shafts (72) and (73) connecting the base ends of the levers (7) and (9) to the handle (5) are connected to the handle (5). The deadman lever (7) has a central horizontal lever operating section (7a) above the handle operating section (10), and a differential lock lever (9) has a central horizontal lever operating section (9a). ) It is arranged below the handlebar operating section (10), and the distance between the lever (7) and (9) from the rear side or both left and right operation positions of the steering handle (5) is made substantially constant, thereby facilitating easy operation. And the levers (7) and (9) can be operated.

As shown in FIG. 11, the main clutch (6
When the deadman lever (7) is moved down and the differential lock is released (unlocked), the operating section (7a) of the deadman lever (7) is moved to the handle operating section. (10), the operating portion (9a) of the differential lock lever (9) is moved closer to the center of the lower surface side of the handle operating portion (10), and the levers (7), (9) When the operation of the steering wheel is necessary, the operating members (7a) and (9a) of the levers (7) and (9) are easily gripped together with the steering wheel operating member (10) without releasing the hand from the steering wheel operating member (10) each time. While the clutch (69) is engaged and the differential lock is disengaged, the main clutch (69) is moved up and down when the deadman lever (7) and the differential lock lever (9) are released from the handle operation part (10). Switching, is configured so as to interrupt the work differential lock as input.

As shown in FIGS. 12 to 16, high and low speed gears (74) (75) provided on the output shaft (19) of the hydraulic transmission (13) and a switching shaft ( 76), a high / low speed switching gear (77) constituting a traveling transmission gear unit (51), and a pair of idler shafts (78) loosely fitted to the output shaft (19) and the switching shaft (76). Reduction gears (79) (80) and differential pinion gears (8
1) and the left and right differential side gears (82a) and (82b) are installed in a pipe-shaped differential case (83).
3) Sprocket (84) fixed to chain (85)
The fixed sprocket (86) of the idle shaft (78) via
And a differential clutch (87) which is a differential lock which is slidably spline-fitted to the right axle (3) and is spliced to the sprocket (84) by operation of the fork (88). 89), the pawl clutch (89) is connected to the sprocket (84) via the wire (71) and the fork shaft (90) and the fork (88) by operating the differential lock lever (9). ) And each gear (81) (82a) (82)
b) is integrated with the differential case (83) to eliminate the difference in rotation between the left and right axles (3) and rotate integrally, and to rotate between the left and right axles (3) when the pawl clutch (89) and the sprocket (84) are disengaged. It is configured to have a differential function that causes a difference.

In this case, a pipe-shaped differential case (83) is provided on the left side of the input sprocket (84), which is an input portion of the differential mechanism (87), and a claw clutch (89) for a differential lock is provided on the right side. The mechanism (87) is configured to be small and compact to reduce the cost, and the transmission case (2) is reduced in size to reduce the tread so that it can appropriately cope with work with a narrow working width. are doing.

Further, the input sprocket (84) fixed to the differential case (83) includes the input sprocket (8).
4) At the position, it is rotatably fitted and supported on the outer periphery of a collar (91) which is spline-fitted to the left wheel (3), and the claw clutch (89) is provided outside the collar (91) fitting portion of the sprocket (84). ), A clutch engagement portion (89a) to be engaged with the differential mechanism (87) is configured to be differentially locked by the input sprocket (84), thereby improving strength and stability of the differential lock function. The differential mechanism (87) is configured to be small and compact.

Further, the outer peripheral surface of the bearing (92) is fitted to the left inner wall surface of the transmission case (2), and the right peripheral surface of the differential case (83) is fitted to the inner peripheral surface of the bearing (92). Fit the differential case (8
The support structure of 3) is simplified to reduce the size and size of the differential mechanism (87).

The bearing (92) is provided with a large diameter, the left side gear (82a) is disposed inside the inner ring of the bearing (92), and the pinion gear (81) and the differential case ( 83) and a part of the left side gear (82a).
2) and the left side gear (82a) are arranged substantially on the same plane, so that the differential mechanism (87) can be made compact and compact so that the transmission case (2) can be formed small.

Further, in the transmission case (2), a high-speed reverse gear (93) provided on the input shaft (18), a low-speed normal sprocket (94), and a PTO transmission shaft (95).
To the forward sprocket (94) and to the chain (9).
Idle rotation sprocket (97) connected via 6)
And the inner gear (9) of the reverse rotation gear (93) or the idle rotation sprocket (97) by spline fitting with the transmission shaft (95).
8) and a forward / reverse switching gear (99) constituting a work transmission gear unit (52) that is selectively coupled to the PTO shaft (2).
PTO which is supported by idle rotation at 0) and connected to a fixed sprocket (100) of the transmission shaft (95) via a chain (101).
An input sprocket (102), a brake plate (104) that is spline-fitted to the PTO shaft (20) and is removably connected to the input sprocket (102) via a pawl clutch (103), and a pawl clutch (103). When the disengagement brake plate (104) is brought into pressure contact with the pressure plate (105) for braking the PTO shaft (20), and by operating the PTO clutch lever (8), the brake plate (104) is moved right and left via the fork shaft (106). Claw clutch (103)
And a PTO clutch fork (107) for engaging and disengaging the shaft. A rotary shaft (23) is connected to the PTO shaft (20) via a transmission chain (108) of a transmission case (21).
The rotary blade (24) is rotated forward at a low speed to perform the tilling operation, while the rotary blade (25) is rotated at a high speed to perform the mowing operation.

Further, the two switching gears (77) (9)
9) a single shifting fork (109) for switching operation
When the switching rod (61) facing the inside of the transmission case (2) is fixed to the switching rod (61), and the height adjustment handle (35) performs two-stage switching of the tilling and mowing height positions of the working machine (22), The two switching gears (77) and (99) are simultaneously switched in two stages, and at the time of tilling, the switching rod (61) is moved to the right so that the gears (75) (77) and (98) (9)
9) is brought into the coupled state to reduce the traveling and working speed, and at the time of mowing work, the switching rod (61) is moved to the left to bring the gears (74) (77) and (93) (99) into the coupled state. The traveling and working speeds are made high.

As described above, in the management machine in which the body having the traveling wheels (1) is equipped with the rotary work machine (22), which is the work rotary, the switching gear (77), which is the traveling speed change portion for changing the traveling speed, and the rotary A transmission gear (99), which is a work shifting part for shifting the speed, and a transmission case (2);
In addition to the above, the switching gears (77) and (99) are simultaneously operated to change the speed, so that the work is performed at a traveling speed suitable for the working speed of various rotary works to improve workability, and the work speed due to erroneous operation or the like is improved. And the running speed can be prevented from being inconsistent with each other, so that the working accuracy can be improved.

[0032] Simultaneous shifting operations of the switching gears (77) and (99) are performed by an adjusting handle (35) which is a working height adjusting member for changing the distance between the working machine (22) and the field. When changing the support height of the work machine (22) by the height adjustment handle (35), the work speed and the running speed are also changed at the same speed, so that the work height suitable for various works such as tilling or mowing and the proper work and running speed are also changed. Thus, good work can be performed without erroneous operation.

Further, the adjustment stage of the height adjustment handle (35) and the shift stage of the traveling and working speed are provided in the same manner, and when the working height of the working machine (22) is changed, such as when tilling or mowing, the working and traveling speeds are changed. In addition, the speed change operation is always performed without any erroneous operation to a speed suitable for the work, so that operability and workability can be improved.

Further, with a simple structure in which a single transmission fork (109) is attached to one switching rod (61), two switching gears (77) and (99) are simultaneously switched to run and work. It is possible to make sure that there is no timing delay between the speeds.

Further, the height adjustment handle (35) can be easily operated by the driver who operates the steering handle (5), and the work height switching member (44) allows a large working machine (2).
2) The height can be adjusted, and the height can be finely adjusted by coupling the screw shaft (36) and the connector (34), so that the work machine (22) can be smoothly and accurately arranged at an appropriate height. be able to.

FIGS. 17 to 19 show the side cover (6).
4) Another example of the rotating configuration is shown in FIG. 17, in which a rotating link (10) that rotates around a rotating fulcrum shaft (108) is attached to a gauge frame (31) of a gauge wheel (32).
9) and one end of the rotary shaft (23).
Link (1) to the side cover (64) that rotates about
09), the side of the rotary blade (24) is covered with the side cover (64) when the gauge wheel (32) is moved downward for performing mowing work, etc., while the gauge wheel (32) is used for tilling work or the like. ), The side cover (64) is rotated counterclockwise to move the lower end upward.

FIG. 18 shows a rod-shaped gauge frame (31) of a gauge wheel (32) in which a pivot shaft (110) of a side cover (64) having a substantially quadrangular shape in a side view is provided in the front-rear horizontal direction. The pivot pin (112) on the outer side of the front end of the side cover (64) is engaged with the pivot shaft (111) fixed to the shaft, and when the gauge wheel (32) is moved upward, the pin (112) is connected to the pivot shaft (111). And the side cover (64) is also supported by the fulcrum shaft (1).
It is configured to move up and down to the left and right centering on 10).

Further, the worm gear (113) is provided on the height adjustment handle (35), and the worm wheel gear (114) connected to the worm gear (113) is provided on the outer peripheral surface of the arc of the side cover (64). hand,
The side cover (64) is simultaneously rotated about the rotary shaft (23) in conjunction with the stepless vertical adjustment of the gauge wheel (32) to change the closed position of the rotary blade (24). Things. Also, a rack gear (113a) is provided on the height adjustment handle (35) in place of the worm gear (113), and a pinion gear (144a) connected to the rack gear is provided on the side cover (64), so that the front and rear directions of the height adjustment handle (35) are provided. The height of the side cover (64) may be adjusted in two stages to the mowing and tilling height positions when adjusting the working height in two stages.

The side cover (64) is arranged outside the right and left side plates (26) of the rotary cover (25) and inside the left and right outer plates of the front cover (40) in a plan view, so that the arrangement is compact. It is configured as follows.

[0040]

As is apparent from the above embodiments, the present invention provides a work rotary (22) for an airframe having running wheels (1).
The right and left side plates (26) of the rotary cover (25) covering the upper part of the work rotary (22) in the management machine equipped with
Since the side cover (64) is provided rotatably on the right side, only the left and right side plates (26) of the rotary cover (25) are used for mowing work with a high working height (ground height) of the working rotary (22). When the rotary blade (24) cannot be properly protected, the gap between the left and right side plates (26) and the field is covered with a side cover (64), and the work rotary (22) is rotated with the rotary cover (25) and the side cover (64). Thus, it is possible to perform a good work properly protected.

Further, the shape of the side cover (64) is formed in a sector shape, and the outer diameter of the side cover (64) is provided smaller than the outer diameter of the left and right side plates (26) of the rotary cover (25). During normal work that does not require the side cover (64) such as tilling work, the rotary cover (25)
The side cover (64) is housed in the shape of the left and right side plates (26) to prevent the cover (64) from becoming an obstacle during the work, and the cover (64) for mowing work etc. The working rotary (22) can be properly protected by acting effectively.

Further, since the center of rotation of the side cover (64) is provided at or near the center of rotation (23) of the work rotary (22), the side cover (64) is not required. When tilling work, etc., the rotary cover (25) is compactly stored in the substantially semicircular shape of the left and right side plates (26), and when the side cover (64) is required, it follows the arc outer diameter line of the left and right side plates (26). Thus, the side cover (64) can be effectively projected from the left and right side plates (26) to appropriately protect the work rotary (22).

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is an overall plan view.

FIG. 3 is a side view of the working machine.

FIG. 4 is a plan view of the working machine.

FIG. 5 is an explanatory side view of a rotary blade.

FIG. 6 is an explanatory diagram of height adjustment of a gauge wheel.

FIG. 7 is an explanatory side view of a height switching portion of a gauge wheel.

FIG. 8 is an explanatory side view of the switching unit.

FIG. 9 is an explanatory rear view of the switching unit.

FIG. 10 is an explanatory plan view of a steering handle portion.

FIG. 11 is an explanatory side view of the steering handle.

FIG. 12 is an explanatory sectional view of a transmission case.

FIG. 13 is an explanatory diagram of a PTO transmission unit.

FIG. 14 is an explanatory diagram of a differential mechanism.

FIG. 15 is an explanatory side view of a mission drive system.

FIG. 16 is an explanatory side view of a traveling and work transmission unit.

FIG. 17 is an explanatory diagram showing another example of the rotation configuration of the side cover.

FIG. 18 is an explanatory view showing another example of the rotation configuration of the side cover.

FIG. 19 is an explanatory view showing another example of the rotation configuration of the side cover.

[Explanation of symbols]

 (1) Running wheels (22) Rotary work machine (working rotary) (23) Rotary shaft (center of rotation) (25) Rotary cover (26) Side plate (64) Side cover

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiromitsu Hayata 1-32 Chayamachi, Kita-ku, Osaka-Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Masami Nakamura 1-32 Chayamachi, Kita-ku, Osaka-Yanmar Agricultural Machinery Co., Ltd. F term (reference) 2B033 AA06 AB01 AB11 AB18 AC05 AC08 BA01 BB03 CA02 CA21 DB03 DB04 DB21 ED01 ED04 ED20 2B034 AA07 BA02 BA08 BC05 HA16 HB17 HB26 HB27 HB34 HB35

Claims (3)

[Claims] 1. A management machine for mounting a work rotary on an airframe having running wheels, wherein a side cover is rotatably provided on left and right side plates of a rotary cover covering an upper portion of the work rotary. 2. The management machine according to claim 1, wherein the side cover has a fan shape, and the outer diameter of the side cover is smaller than the outer diameter of the left and right side plates of the rotary cover. 3. The management machine according to claim 1, wherein the center of rotation of the side cover is provided at or near the center of rotation of the work rotary.