JP2001190102A - Walking type agricultural implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance, or the like, of a rotary device. SOLUTION: A rotary cover for covering the upper part of plural rotary tines is stretched on a rotary case, and a handle is attached to the front part of the rotary cover.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a walking type agricultural work machine.

[0002]

2. Description of the Related Art Conventionally, as one form of a walking type agricultural working machine,
While the engine is mounted on the fuselage, a drive case is connected to the lower part of the fuselage, and the drive case extends rearward and extends forward and downward from the front of the transmission case. And a pair of left and right traveling wheels are attached to the rear of the transmission case via an axle, and a handle is provided to extend rearward and upward from the transmission case, while the front of the rotary case is provided. A rotary shaft is provided so as to penetrate the rotary shaft in the left-right direction, a plurality of rotary claws are attached to the rotary shaft to form a rotary device, and a rotary cover is provided on the rotary case to cover the plurality of rotary claws. There is something.

[0003]

However, in the above-mentioned walking type agricultural working machine, since the upper portion of the rotary claw is covered with the rotary cover, there is a problem that maintenance of the rotary claw and the like cannot be easily performed.

[0004]

Therefore, according to the present invention, while an engine is mounted on the fuselage, a drive case is continuously provided below the fuselage, and the drive case is a transmission case extending rearward. And a rotary case extending forward and downward from the front of the transmission case, and a pair of left and right traveling wheels are attached to the rear of the transmission case via an axle. In a walking-type agricultural working machine in which a rotary shaft is provided to extend rearward and upward, a rotary shaft is provided in a front portion of a rotary case so as to penetrate in the left-right direction, and a plurality of rotary claws are attached to the rotary shaft to form a rotary device.
A walking-type agricultural working machine is provided in which a rotary case is provided with a rotary cover covering the upper part of the plurality of rotary claws and a handle is provided at a front portion of the rotary cover.

[0005]

Embodiments of the present invention will be described below.

That is, the walking type agricultural working machine according to the present invention has a basic structure in which an engine is mounted on the body, a drive case is continuously provided at a lower portion of the body, and the drive case is directed rearward. A transmission case extending from the front of the transmission case and a rotary case extending forward and downward from the front of the transmission case are integrally formed, and a pair of left and right traveling wheels are mounted to the rear of the transmission case via an axle. While the handle is provided to extend rearward and upward from the transmission case, a rotary shaft is provided to penetrate the front of the rotary case in the left-right direction, and a plurality of rotary claws are attached to the rotary shaft to form a rotary device. I have.

[0007] As a characteristic structure, a rotary cover covering the upper part of the plurality of rotary claws is stretched over the rotary case, and a handle is provided at a front portion of the rotary cover.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

A shown in FIGS. 1 and 2 is a walking-type agricultural working machine according to the present invention. The walking-type agricultural working machine A is provided behind a farm working machine main body 1 having a rotary device 2 as a main working device. The seeding device 3 as various auxiliary working devices is connected via a lifting mechanism 4 so as to be vertically movable and detachable, and the seeding device 3 has a handle provided on the agricultural working machine main body 1 as shown in FIG. At 30, it is possible to suspend and support at the ascending and rising position via the suspending support 5.

As shown in FIGS. 1 and 2, the main body 1 of the agricultural work machine has an engine 11 mounted on a
The drive case 12 is connected to the lower part of the
The transmission case 13 is formed integrally with a transmission case 13 extending rearward and a rotary case 14 extending forward and downward from the front of the transmission case 13.
A pair of left and right traveling wheels 16 and 16 are attached to a rear portion of the rotary shaft 13 via a pair of left and right axles 15 and 15, while a rotary shaft 17 is provided at a front portion of the rotary case 14 so as to penetrate in the left and right direction. Rotary device 2 with a plurality of rotary claws 18 attached
Is formed. 19 is a fuel tank.

The engine 11 has a transmission case 13
Are interlockingly connected via a transmission case 6.

As shown in FIGS. 3 and 4, the airframe 10 is formed of an engine frame 20 for supporting the engine 11 and a rotary frame 21.
Is arranged so that a pair of left and right plate bodies 21a, 21a of a substantially semi-circular shape are opposed to each other so as to sandwich the rotary case 14 from the left and right sides, and upwardly on the upper edges of both plate bodies 21a, 21a. A semi-circular rotary cover 22 that curves in a convex shape is stretched, and side covers 23, 23 are respectively suspended from left and right edges of the rotary cover 22 so as to cover above the plurality of rotary claws 18 described above. are doing.

In a substantially central portion of the rotary cover 22, as shown in FIGS. 2, 4 and 5, a drain guide groove 24 is provided.
The drain guide groove 24 is provided with a rotary cover.
A pair of left and right vertical ribs 24a, 24a extending in the front-rear direction from the front end of the head 22 to a substantially central portion, and horizontal ribs 24b connecting the rear ends of the two vertical ribs 24a, 24a are formed.

In this manner, the drain discharged from the drain discharge portion 25 (see FIG. 1) formed at the lower front side of the engine 11 is guided to the drain guide groove 24, and
It is made to flow down from the front end of 24 so that it can be reliably received in a drain container or the like.

A handle is provided at the front of the rotary cover 22.
By holding the handle 28, the rotary device 2 can be easily lifted, and maintenance and the like of the rotary device can be easily performed.

As shown in FIGS. 1 and 3, a resistance bar 26 is mounted on the rotary case 14 via a mounting bracket 27. The resistance bar 26 is located just behind the rotary shaft 17. 14, the tip 26a of the resistance bar 26 is positioned in the vicinity of the tip end locus of the rotary claw 18.

Moreover, the resistance bar 26 is, as shown in FIG.
It is formed in a V-shaped cross section, and the top 26b is located forward. 26c is a reinforcing plate.

In this way, the residual tillage formed immediately below the rotary case 14 by the resistance bar 26 is treated,
Prevents dashing of the machine.

At this time, since the resistance bar 26 is projected rearward and downward from the rotary case 14 and the top 26b is directed forward, the tilled soil that is separated by the resistance bar 26 smoothly flows backward. Thus, the remaining tillage treatment is performed efficiently.

Further, the main body 1 of the agricultural working machine is provided with the components shown in FIGS.
As shown in the figure, a handle 30 is provided.
A pair of left and right handle bases 31, 31 extending upward from the upper left and right side walls of the transmission case 13, and connecting the front ends to the rear ends of the handle bases 31, 31 so as to move upward. It is formed in a loop shape from a pair of left and right handle bodies 32, 32 extended and a grip portion forming body 33 integrally formed in a horizontal shape between rear ends of both handle bodies 32, 32.

As shown in FIGS. 7 and 8, the handle base body 31 is formed in a pipe shape, and is formed in a U-shaped cross section which is open at the outside by clamping the front end 31a.
Bolt insertion holes 31b, 31b are formed in 31a.

As described above, the rigidity of the handle base body 31 is increased, and the mounting strength of the handle 30 is increased.
Vibration is prevented.

Further, the front end portion 31a can have a function of preventing the hexagon nut from rotating by matching the U-shaped width with the width of the two opposing surfaces of the hexagon nut.

As shown in FIGS. 3 and 4, the handle bases 31, 31 are provided with mounting bosses 13a, 13a projecting from upper left and right side walls of the transmission case 13, and left and right of a transmission guide 34, which will be described later. Between the side wall portions 34a, 34a, the mounting boss portions 13a,
The two mounting pipes 35, 35 'are penetrated on a concentric circle centered at 13a, and are mounted on one of the left and right ends of one of the mounting pipes 35, 35' by mounting bolts 36, 36.

In this manner, the handle base bodies 31, 31
When mounted on the left and right ends of the mounting pipe 35, the ground height of the grip portion forming body 33 can be set high, and when mounted on the left and right ends of the mounting pipe 35 ',
The height above the ground of the grip portion forming body 33 can be set low, and two-step vertical position adjustment can be performed as appropriate.

Also, as shown in FIG.
The inner diameter of the handle body 31 is formed larger than the outer diameter of the handle body 32, and the handle body 32 is attached to the rear end 31c of the handle base body 31.
The front end 32a is inserted and connected.

In this way, the rigidity of the handle 30 is increased, and the occurrence of vibration is prevented.

As shown in FIGS. 9 and 10, the grip portion forming body 33 extends inward and rearward from the rear ends of the handle main bodies 32, 32 and has an inclined grip that is inclined with respect to the front-rear direction. Portions 33a, 33a, and both inclined grip portions 33a, 33a
Horizontal gripping part 33 that is substantially perpendicular to the front-rear direction between the inner ends of
b.

In this way, even if the operator stands on the left or right side of the machine, the operator can easily grip one of the inclined grip portions 33a, 33a to perform the steering operation reliably. In this case, the inclined grip portion 33a is inclined with respect to the front-rear direction, and the operator can naturally and firmly grip the inclined grip portion 33a without gripping such that the operator returns the wrist unnaturally. As a result, fatigue of the hand of the operator who is holding it can also be reduced.

Therefore, the steering operation can be performed reliably, and the working efficiency can be improved.

In addition, since the holding portion forming body 33 can form the inclined holding portions 33a, 33a at the left and right end portions and the horizontal holding portion 33b therebetween in a straight line, the holding portion forming body 33 can be formed. Is easier to process and can be manufactured at a lower cost than when the whole is formed in a rounded arc shape.

As shown in FIGS. 9 and 10, the clutch lever 40 can be moved up and down between the handle bodies 32, 32 of the handle 30 constructed as described above via the pivot pieces 41, 41. The clutch operation wire 42 is interposed between the clutch lever 40 and a clutch mechanism (not shown) provided in the transmission case 20 and a direction in which the clutch lever 40 is erected (FIG. 10). At the same time, the clutch mechanism is set to the power-off state when the clutch lever 40 is in the upright state, and the clutch mechanism is set to the power-connected state when the clutch lever 40 is in the down state. I have to.

As shown in FIG. 9, the clutch lever 40 includes left and right mounting bases 40a, 40a and mounting bases 40a, 40a.
a inclining operation portions 40b, 40b formed so as to extend inwardly from a and to vertically overlap the left and right inclining grasping portions 33a, 33a of the grasping portion forming body 33 in the lying state; 40b, 40
b, a horizontal central operating section 40c formed by bending forward in a convex shape, and the central operating section 40c and the left and right tilt operating sections.
The left and right connection parts 40d, 40d are formed between the left and right connection parts 40d, 40d, and the left and right connection parts 40d, 40d. .

In this manner, the left and right mounting bases 40a, 40a
The left and right side tilt operation sections 40b, 40b and the left and right connection sections 40d, 40d form left and right convex holding spaces S1, S1 that are convex backward, and the left and right side connection sections 40d, 40d and the central operation section 40c. To form a central gripping space S2 that is convex forward, and these gripping spaces S1, S1, S2 are connected to the left and right connecting portions arranged in an eight-letter shape.
The space as large as possible can be ensured by 40d, 40d, so that each operation unit 40b, 40b, 40c is easily gripped.

At this time, when the clutch lever 40 is turned down, the left and right tilt operating portions 40b, 40b are vertically overlapped with the left and right tilt grip portions 33a, 33a of the handle 30 to form each operating portion 40b.
It is easy to hold the b, 40b and each of the holding portions 33a, 33a together, and the walking work can be performed while the clutch mechanism is kept in the power-connected state.

When the clutch lever 40 is released, the clutch lever 40 is restored to the upright state by the rotational urging force, and the clutch mechanism is kept in the power-off state.

Also, the clutch mechanism is gripped by holding the handle 30 with one hand and holding the central operating portion 40c of the clutch lever 40 with the other hand to slightly lower the central operating portion 40c. It is also possible to operate the clutch in a half-clutch state. At this time, the central operating section 40c is disposed forward of the left and right tilt operating sections 40b, 40b, and the central gripping space S2 is largely secured. Even if one hand holding the handle 30 is brought close to one hand holding the part 40c, both hands do not contact each other,
The repeated operation of engaging the half-clutch and the clutch can be reliably performed, and the operability of the clutch can be improved.

The repetitive operation of the half-clutch and the engagement of the clutch can be appropriately performed at the time of moving the body, at the beginning of work start, and at the time of turning.

Here, since the conventional clutch lever 40 is formed so as to vertically overlap the grip portion forming body 33 of the handle 30 in the lying state, the clutch lever 40 is repeatedly engaged with the half-clutch and the clutch. However, there was a problem in that the hands gripping the clutch lever 40 and the grip portion forming body 33, respectively, hit each other and it was difficult to operate. Can be.

As shown in FIGS. 3 and 4, a speed change guide 34 is mounted on the upper portion of the transmission case 13. The speed change guide 34 has left and right side wall portions 34a, 34a and both left and right side wall portions. A ceiling wall portion 34b suspended between upper ends of the portions 34a, 34a,
As shown in FIG. 11, the left and right side wall portions 34a, 34a are formed from a rear wall portion 34c extending between the rear ends of the left and right side wall portions 34a.
A transmission guide groove 34d is formed.

As shown in FIG. 3, the left and right side walls 34a, 34a are attached to the upper edges of the left and right side walls of the transmission case 13 by two mounting bolts 45, 45 respectively. The upper portions of the parts 34a, 34a are connected to the left and right handle base bodies, the base ends of which are fixed to the transmission case 13 as described above.
At 31 and 31, mounting bolts 36 are mounted via mounting pipes 35.

In this way, the left and right side walls 34a, 34a of the transmission guide 34 are supported at the three points by the mounting bolts 45, 45, 36 on the left and right side walls of the transmission case 13 and the left and right handle bases 31, respectively. It has been firmly mounted.

As shown in FIG. 11, a lower portion of a shift lever 47 whose base end is interlocked with first and second shifter shafts 97 and 99 in the transmission case 13 to be described later is inserted into the shift guide groove 34d. The gearshift lever 47 is inserted along with the gearshift guide groove 34d to enable gearshift operation. F1 is the forward low speed position,
F2 is a forward high-speed position, R is a reverse position, P is a rotary work position, and N is a neutral position.

As shown in FIG. 1 to FIG. 4, the front lifting wheel 50 is attached to the agricultural work machine main body 1.
The boss 51a attached to the tip of the wheel support arm 51 and attached to the base end of the wheel support arm 51 is attached to a rotary frame.
A pivot 52 is provided at the center of a pair of left and right plate bodies 21a, 21a forming
, The pivot arm 53 is raised upward from the boss portion 51a, and a lifting / lowering adjusting lever 54 is provided near the handle 30 and the lifting / lowering adjusting lever 54 is
A lifting adjustment interlocking mechanism 55 is interposed between the rotary arm 53 and the rotary arm 53.

The raising / lowering interlocking mechanism 55 connects the front end of the connecting rod 56 extending in the front-rear direction to the upper end of the rotating arm 53 via a connecting pin 57, and a rear portion 56a of the connecting rod 56.
Is arranged in the transmission guide body 34 and bent to the left so as to project outward through an insertion hole 58 formed in the center of the left side wall 34a of the transmission guide body 34. The base end of 54 is integrally connected, and an elevating positioning body 59 is attached to the lower edge of the insertion hole 58, and the elevating positioning body 59 has a plurality of elevating positioning grooves 59a, 59b, 59c. Forming, any one of the vertical positioning grooves 59a, 59b,
A locking piece 56b connected to a rear portion 56a of the connecting rod 56 can be locked to 59c.

As described above, by operating the lifting / lowering adjustment lever 54 to lock the locking piece 60 in one of the vertical positioning grooves 59a, 59b, 59c, the connecting rod 56 → rotating arm 53 → wheel The body of the front lifting wheel 50 via the support arm 51
The support height for 10 can be adjusted smoothly and reliably.

At this time, the elevation adjustment lever 54 is
, The handle 30 can be easily operated with the other hand while holding the handle 30 with one hand, and the operability of the front lifting wheel 50 can be improved.

As shown in FIGS. 1 and 2, the seeding device 3 is provided with a seeding hopper 61, a seeding feeding part 62 and a chute 63 at the center of a supporting machine frame 60, and a groove generator at the lower end of the chute 63.
Attach 64, place the soil cultivation plate 65 from the support machine frame 60 at the position immediately behind the groove device 64, and provide a work machine side hitch 66 at the front end of the support machine frame 60, A pair of left and right roller support arms 60a, 60a extending rearward and downward from the supporting machine frame 60
Between them, a pressure reducing roller 67 is rotatably mounted via a roller support shaft 68.

Further, the left end of the roller support shaft 68 is operatively connected to the seed dispensing portion 62 via a transmission mechanism 69 to transmit the rotational force of the pressure reducing roller 67 rotating while being pulled in the field through the transmission mechanism 69. To the seeding and feeding unit 62 so that the seeding and feeding unit 62 can be driven.

In this manner, the seeds in the seeding hopper 61 are fed to the shoot 63 by the seeding feeder 62, dropped from the shoot 63 into the grooves formed by the groove generator 64, and The soil is cultivated and crushed by the crushing roller 67.

As shown in FIGS. 1, 2 and 12, the lifting mechanism 4 includes a link support 70, a pair of left and right upper links 71, 71 pivotally supporting the base end of the link support 70, and a lower side. Link
72, and a body-side hitch 73 attached to the tip of each of the links 71, 71, 72.

The link support 70 is, as shown in FIG.
Support front wall 70a attached to rear wall 34c of transmission guide 34
And left and right side walls 70b, 70b of the front wall 70a projecting rearward from the left and right side edges of the front wall 70a, respectively. The lift guide surfaces 70c, 70c are formed on the
The upper and lower portions of 70c are formed with concave portions 70d, 70d for raising and lowering portions 70e, 70e for lowering, respectively.

A hook 74 for holding the raised position is attached to the upper part of the left side wall 70b of the support, and the hook 74 for holding the raised position is moved over the fulcrum by the coil spring 75 in the locking direction and the unlocking direction. Rotating bias is applied. 74a is a hook pivot pin, and 75a and 75b are spring retaining pieces.

In the middle of the left and right side walls 70b, 70b, pin insertion slots 76 are formed, respectively.
A spring connecting pin 77 is slidably inserted into the coil 76, and a coil spring 79 is interposed between the spring connecting pin 77 and a spring connecting piece 78 protruding from an upper end of a body side hitch 73 described later. I have.

A pair of left and right upper links 71, 71 are provided with pivot pins 71a, 71a from the inner side at the rear ends of the left and right side walls 70b, 70b of the support.
Sliding pins 71b, 71b, which are pivotally supported via 71a and protrude outward from the middle portions of the upper links 71, 71, respectively, are brought into sliding contact with the elevating guide surfaces 70c, 70c. Are connected to upper portions of left and right side walls 73b, 73b of the main body side hitch 73 via connection pins 71c, 71c.

The lower link 72 has a base end on the left and right side walls 70 of the support.
Boss partly in the middle of the connecting support shaft 80 laid horizontally between the lower parts of b and 70b.
The end is pivotally connected via a boss portion 72b to a middle portion of a connection support shaft 81 which is suspended between the lower portions of the right and left side walls 73b, 73b of the main body side hitch 73. .

As shown in FIGS. 12 to 14, the main body side hitch 73 is formed by a front wall 73a and left and right side walls 73b, 73b formed so as to project rearward from left and right side edges of the front wall 73a. It is formed in a U-shape, and a spring connecting piece 78 is projected from the center of the upper end of the front wall 73a, and a locking pin 85 is laid horizontally on the rear upper part of the left and right side walls 73b, 73b. Side walls 73b, 73b
A connecting pin engaging recess 73c, 73c is formed at the lower end of the rear end, and a middle part of a pair of left and right connecting hooks 82, 82 is pivotally supported at the left and right ends of the connecting support shaft 81, The lower ends of the connecting hooks 82, 82 are connected by a connecting body 83, and a locking projection 82a is protruded outward from the upper end of the right connecting hook 82, and is connected to the locking projection 82a. A locking concave portion 82b is formed, and the ends 84a and 84b of the torque spring 84 wound around the connecting support shaft 81 are locked to the connecting body 83 and the spring locking pieces 73d formed on the left side wall 73b, respectively. The connecting pin 66c provided on the work implement side hitch 66 engaged between the connecting pin engaging recesses 73c, 73c is locked and connected by the connecting hook 82.

Further, a connection release lever support shaft 86 is laid horizontally below the left and right side walls 73b, 73b, and a lower end of a connection release lever 87 is attached to the right end of the connection release lever support shaft 86. A locking pin 87a is protruded inward in the middle of the locking member 87, and the distal end of the locking pin 87a is locked in the locking recess 82b of the locking projection 82a, thereby connecting the hook for connection. 82, 82 can be held at the disengaged position against the urging of the torque spring 84. Reference numeral 89 denotes a regulating pin that regulates the backward rotation of the connection release lever 87.

Further, a projecting piece 88 for return is protruded rearward in the middle of the connection release lever support shaft 86.

As shown in FIGS. 12 to 14, the work machine side hitch 66 has a plate 66a that can be fitted between the left and right walls 73b, 73b of the main body side hitch 73, and an upper edge of the plate 66a. A locking hook 66b formed, a connecting pin 66c attached to the lower part of the front surface of the plate body 66a with the axis directed in the left-right direction, an action piece 66d protruding from a lower part of the front surface of the plate member 66a, and And a connecting cylinder 66e mounted on the rear surface with the axis directed vertically. 66f is a connection hole.

The locking hook 66b is locked to the locking pin 85 of the body side hitch 73, and the connecting pin 66c is engaged with the connecting pin engaging recesses 73c, 73c of the body side hitch 73. ing.

Here, the connecting hook 8 of the body side hitch 73
2, 82 are formed at the rear end with connecting pin guide inclined surfaces 82c, 82c, and the work machine side hitch 66 is engaged while pressing the connecting pins 66c against the connecting pin guide inclined surfaces 82c, 82c. Stop pin 8
When the connection hooks 82 and 82 are rotated downward around the center 5, the connection hooks 82 and 82 are rotated in the connection release direction against the rotational urging force of the torque spring 84, and the connection pin 66c is engaged with the connection pin engagement recesses 73c and 73.
When engaged with c, the connecting hooks 82, 82 rotate toward the connecting side by the biasing force of the torque spring 84, and as a result, the connecting pin 66c is brought into the connected state.

When releasing the connection, the connection release lever 87 is rotated clockwise in FIG. 13 so that the distal end of the locking pin 87a is engaged with the locking recess 82a of the locking projection 82a. 82b
, The connection hooks 82, 82 can be held at the connection release position against the urging force of the torque spring 84.

In this state, when the work machine side hitch 66 is removed from the main body side hitch 73, the action piece 66d projecting from the lower front portion of the plate 66a hits the return projection 88, and the return projection 88 is moved. 88
Is rotated counterclockwise in FIG.
The coupling release lever 87 connected to the coupling lever 88 via the coupling release lever support shaft 86 is rotated counterclockwise to lock the pin 87a.
Is unlocked from the locking recess 82b.

As a result, the connecting hooks 82, 82 are automatically returned to the original connecting posture by the biasing force of the torque spring 84.

As described above, the main body side hitch according to the present embodiment is provided.
In 73, since there is no need to operate the same body side hitch 73 at the time of connection, one worker can carry out the connection work by holding various sub-working machines with both hands, improving the connection workability and safety. Can be secured.

The hanging support 5 is shown in FIGS.
As shown in FIG. 5, a pair of left and right connecting portions 5b, 5b for connecting to the seeding device 3 are provided at the lower ends of a pair of left and right supporting tool bodies 5a, 5a extending in the vertical direction. Between the upper parts of the support members 5a, 5a, the width between the upper ends of the support tool bodies 5a, 5a is reduced, the upper ends are connected, and the upper ends are bent into a hook shape. 5d
Is formed. 5e is a connecting piece.

The connecting portions 5b, 5b are connected to the roller support arms 60a, 60a via connecting brackets 60b, 60b.
They are detachably connected by 5f, 5f.

As described above, when the machine is turned or moved, the seeding device 3 is suspended and supported by the handle 30 in the upwardly jumping state via the suspension support 5 so that the handle 30 is lowered. Even when the rotary device 2 is raised about the running wheels 16 and 16 by operation, the machine can be easily turned or moved without grounding the seeding device 3.

At this time, the load of the seeding device 3 is
Since the operation of lowering the handle 30 can be performed easily, the turning and moving operations of the machine can be performed smoothly.

When suspending and suspending the seeding device 3 on the handle 30 via the suspension support 5, the operator holds the handle 30 with one hand and suspends and supports the handle 30 with the other hand. The gripping portion 5c of the tool 5 is gripped from below and pulled up, and is locked to the horizontal gripping portion 33b of the handle 30.
By locking 5d, the seeding device 3 can be easily and reliably put into the suspended state.

When the suspended state of the seeding apparatus 3 is released, the suspended state of the seeding apparatus 3 can be easily released by going back through the procedure opposite to that described above.

When the hanging support 5 is not used, it is tilted forward as shown by the dashed line in FIG.
The seeding apparatus 3 can be supported in a stable state.

As shown in FIGS. 16 and 17, the transmission case 13 and the rotary case 14 forming the drive case 12 are rotated around the transmission case 13 via shaft support members 13b, 13b such as bearings and oil seals. A pair of left and right axles 15 and 15 movably supported, a differential device 90 interposed between the inner ends of the two axles 15 and 15, and a sprocket 91, 92 and a chain 93 to the differential device 90. Gears and gears
A first shifter shaft having a traveling-side intermediate shaft 95 having a power transmission gear 96 and a power transmission gear 96 which is displaced in the axial direction in conjunction with the operation of the shift lever 47 and is displaced in the axial direction following the axial displacement; 97
And a second shifter shaft 99 having a shift fork 98 which is displaced in the axial direction in conjunction with the operation of the shift lever 47, and an engine 11 which supports a gear 100 which is displaced in the axial direction by the shift fork 98 via a spline portion 101. , An intermediate shaft 106 having fixed gears 103 and 104 transmitting power on the traveling side and an idle gear 105 transmitting power on the rotary side, a rotary intermediate shaft 108 having a gear 107, and a sprocket 109,
It has a rotary shaft 17 that is linked via a chain 110 and a chain 111.

Then, as shown in FIG.
The numeral 47 allows a shift operation along the speed change guide groove 34d of the speed change guide body 34.

When the first shift shaft 97 is at the neutral position N, the second shifter shaft 99 is moved to the neutral position N, the rotary-off, forward low-speed position F1 where the rotary shaft 17 is not rotated, and the rotary shaft for rotating the rotary shaft 17. It is selectively moved to each position of the work position P.

When the second shifter shaft 99 is in the neutral position N, the first shifter shaft 97 is moved to the neutral position N, the reverse position R which is not rotated by the rotary shaft 17, and the rotary shaft
17 is selectively moved to each of the forward high-speed positions F2 without turning.

Each of the shifter shafts 97 and 99 has the structure shown in FIGS.
As shown in the figure, positioning grooves 97a, 99 corresponding to each shift stage
a is provided so that balls 112 and 113 attached by a coil spring (not shown) are engaged with each other. Reference numerals 114 and 115 denote regulating balls, respectively.

Power transmission gear 96 supported on first shifter shaft 97
Is a power transmission gear that displaces in the axial direction following the axial displacement of the first shifter shaft 97, and changes the transmission path of the power taken out to the output side according to the displacement position.

As shown in FIG. 17, a differential device 90 is provided between a sprocket 91 and an inner end of a pair of left and right axles 15, 15, and a cylindrical primary transmission member 120 integrated with the sprocket 91. A pair of left and right disk-shaped secondary transmission members 121, 121 facing the left and right end surfaces, and a moving body 122, provided between the primary transmission member 120 and the secondary transmission members 121, 121.
122, and a coil spring 123 interposed between the moving bodies 122 facing each other.

The movable body 122 is a steel ball which is movable between an engagement position for engaging the primary transmission member 120 and the secondary transmission member 121 with each other and a release position for releasing this engagement. When the load acting on the secondary-side transmission member 121 exceeds a predetermined value, the movable body 122 is retracted from the engaged position to the disengaged position, and the transmission of power is cut off. Like that.

As described above, when the vehicle runs straight,
The primary transmission member 120 and the left and right secondary transmission members 121, 121 are engaged by the moving bodies 122, 122, and their straightness is maintained.

On the other hand, when the machine is turned, a large load is applied to the traveling wheels 16 on which the load acts to restrict the rotation. Therefore, the secondary side on which the large load acts is applied. A twist is generated between the transmission member 121 and the primary transmission member 120, the moving body 122 is disengaged, the primary transmission member 120 and the secondary transmission member 121 are disengaged, and the large load is applied. The transmission of power to the axle 15 that has acted is cut off, and smooth turning can be performed.

Further, the differential device 90 is provided with a lock mechanism 125, and the lock mechanism 125 is arranged such that the moving bodies 122 are located at the engagement positions and the primary and secondary transmission members 120, 12 are provided.
When the first and second gears 121 and 121 are engaged with each other, the regulating means 126 holds the engaged state to regulate the relative rotation of the left and right axles 15 and 15.
And operating means 127 for operating the regulating means 126.

In this manner, by operating the operating means 127 and regulating the relative rotation of the left and right axles 15, 15 by the regulating means 126, even if the torque difference applied to the left and right axles 15, 15 fluctuates. However, the locking and unlocking between the primary and secondary transmission members 120, 121, and 121, which are not intended by the operator, are not frequently performed, so that stable straight traveling performance of the machine can be ensured, and the ridge of the machine can be secured. Crossing can be performed reliably.

In the above-described configuration, a pair of left and right support portions 13c, 13c for supporting the lower peripheral surface of the differential device 90 is protruded from the lower inner surface of the transmission case 13.

As described above, when a load is applied to the axles 15, 15, the axles 15, 15 are supported by the shaft support members 13b, 13b and the support portions 13c, 13c via the differential device 90. As a result, it is possible to prevent the axles 15 and 15 from tilting. As a result, the shaft supporting members 13b and 13b such as bearings and oil seals can be prevented.
13b can be prevented from being damaged, and the coaxial support members 13b,
The frequency of maintenance and the like of 13b can be reduced.

The support portions 13c, 13c are provided with lateral displacement restricting portions 13d, 13d for restricting lateral displacement of the differential device 90 in the left-right direction, respectively.

In this manner, the lateral displacement of the differential device 90 in the left-right direction can be surely regulated by the lateral displacement restricting portions 13d, 13d, so that the differential mechanism of the differential device 90 can be properly secured. I can do it.

FIGS. 18 to 20 show an elevation adjustment interlocking mechanism 55 as a second embodiment.
Is connected to the base of the wheel support arm 51 by a connecting pin 132 as a connecting member via a pair of left and right connecting brackets 131, 131. A plurality of locking recesses 133 are formed in the rear end edge at intervals in the vertical extension direction, and any one of the locking recesses 133 is used as a pair of left and right plate bodies 21a, 21a forming the rotary frame 21. The upper end of the locking body 130 can be locked at a locking pin 134 serving as a locking member extending between the locking members.
An operation gripping body 136 is provided at the upper end of the locking body 130 so as to protrude upward from 135.

The connecting pin 132 is provided with pin insertion holes 138, formed in a pair of left and right connecting brackets 131, 131, respectively.
138, insert the shaft line
The head 132a and the tip 132b of the 132 are respectively brought into contact with the inner surfaces of a pair of left and right plate bodies 21a, 21a, and when adjusting the elevation of the front lifting wheel 50, the connecting pin 132 is connected to the pair of left and right plate bodies 21a, 21a.
It slides between them.

As described above, since the connecting pin 132 is compactly accommodated between the left and right side plates 21a, 21a of the rotary frame 21, assembly and structure can be simplified, and the connecting pin 132 can be reliably prevented from coming off. .

A torque spring 137 is wound around the connecting pin 132 so that one end of the torque spring 137 is
While the other end 137b is locked on the wheel support arm 51 while the other end 137b is locked on the locking body 130, the locking body 130 is urged clockwise in FIG. The locking recess 133 can be held in a locked state by the locking pin 134.

Therefore, when performing the lifting / lowering adjustment operation of the front lifting wheel 50, the operation gripper 136 is gripped and the locking member 13 is held.
0 is rotated against the rotational urging force of the torque spring 137 to release the locking recess 133 from the locking pin 134, and then move the locking body 130 in the vertical direction. After adjusting the slide position, the matching locking concave portion 133 is opposed to the locking pin 134, and the locking concave portion 133 is easily and securely fixed by the rotating urging force of the torque spring 137.
Since it is locked to 4, the lifting and lowering adjustment work can be performed easily with one hand.

FIGS. 21 to 23 show a hanging support 5 as a second embodiment. The hanging support 5 includes a pair of left and right connecting portions 5b, 5b and both connecting portions 5b, 5b. Enlargement / reduction adjusting portions 5g, 5g for adjusting the distance between them, a support main body 5a formed by being raised upward from both enlargement / reduction adjustment portions 5g, 5g, and the support main body
A grip 5c provided at the upper end of 5a so as to intersect in a T-shape, and hook-shaped locking portions 5d, 5d provided at both ends of the grip 5c.
And formed from.

The connecting portion 5b is formed in an inverted L-shape by a vertically extending piece 5j and a left and right extending piece 5k.

The expansion / contraction adjusting portion 5g includes a tubular body 5m through which the left-right extending piece 5k of the connecting portion 5b is inserted, and a tightening fixing screw 5n attached to the cylindrical body 5m to tighten and fix the left-right extending piece 5k.
Is provided.

Further, the cylindrical bodies 5m, 5m of the left and right expansion / contraction adjusting portions 5g, 5g have their inner end portions connected in a back-and-forth superimposed state.
It is attached to the lower end of the support body 5a.

In this way, by operating the tightening and fixing screw 5n and appropriately adjusting the position of the horizontal extension pieces 5k, 5k of the respective connecting portions 5b, 5b, the horizontal distance between the vertical extension pieces 5j, 5j can be adjusted. Can be adjusted arbitrarily.

Here, as shown in FIGS. 21 to 23, the work frame side hitch 66 has a mounting frame 14 extending in the left-right direction.
0 are connected to each other, and a pair of right and left seeding apparatuses 3 and 3 are mounted on the mounting frame 140 so that the mounting position can be adjusted according to the strip interval.

Further, the above-mentioned hanging support device 5 can be mounted on a pair of right and left by the expansion and contraction adjustment units 5g, 5g, even in the case of various sub-working devices in which the interval in the left-right direction is adjusted arbitrarily as in the above-mentioned seeding devices 3 and 3. By adjusting the distance between the connecting portions 5b, 5b, the suspension can be supported in a well-balanced manner.

Therefore, also in this case, the turning / moving operation of the machine can be performed smoothly and reliably.

FIG. 24 shows a main body side hitch 73 as a second embodiment. The main body side hitch 73 has the same basic structure as that of the main body side hitch 73 as the first embodiment. However, an upper spring locking pin 145 protruding from the front upper portion of the left connecting hook 82 and a lower spring locking pin 146 protruding from the lower rear portion of the left side wall 73b of the main body hitch 73 are provided. Between them, a coil spring 147 is interposed.

In addition, the coil spring 147 extends beyond the connection support shaft 81 of the connection hook 82 and
Can be held in the connection posture and the connection release posture, respectively. 148 is a stopper pin.

Therefore, when connecting the various sub-working devices, the connecting hook 82 is held in the uncoupling position in advance, and after the connection, the connecting hook 82 can be held in the connecting position. The work can be performed with both hands while holding the various sub-working devices, so that good connection workability and safety can be ensured.

Also, the work of disconnecting the various sub-working devices is
The operation can be performed in the reverse order to the above, and the operation can be performed by holding various auxiliary working devices with both hands.

FIG. 25 and FIG. 26 show a main body side hitch 73 as a third embodiment. The main body side hitch 73 is provided at the upper ends of left and right side walls 73b, 73b.
In addition, a lower locking concave portion 151 which opens rearward is formed in the lower portion of the rear end of the left and right side walls 73b, 73b, and connecting hooks 82, 82 are connected to the left and right side walls 73b, 73b respectively.
Mounted via 0,160.

Further, the working machine side hitch 66 connected to the main body side hitch 73 is, as shown in FIGS.
Locking rods 153, 154 extending in the left-right direction are attached to the upper end portion and the middle portion of the column 152 extending in the vertical direction, respectively, by penetrating them in a crossed manner.
Flange-shaped side wall receivers 155, 155, 156, 156 are attached to the left and right end portions, and various sub-working device connecting frame bodies 157 are attached to the lower portion of the column 152.

In this manner, the upper and lower locking recesses 150 and 151 are opened by turning the left and right connecting hooks 82 and 82 to the connection releasing position in advance so that the upper and lower locking recesses 150 and 151 are opened. The upper locking rod 153 of the working machine side hitch 66 is horizontally locked in the locking recess 150, and the upper locking rod 153 is used as a rotation support shaft. By rotating the lower locking rod 154, the lower locking rod 154 can be easily locked in the lower locking recess 151, and then the connecting hook 82 is rotated to rotate the lower locking rod 154.
The connection work can be easily performed by engaging the connection hook 82 in the connection posture by locking to the left end of the connection hook.

At this time, since the connecting work can be performed while holding the various sub-working machines with both hands, the connecting workability and safety can be ensured well.

Also, the work of disconnecting the various sub-working devices is
It can be easily performed by going back the procedure opposite to the above.

FIGS. 27 and 28 show a lifting mechanism 4 as a second embodiment. The lifting mechanism 4 has the same basic structure as the above-described lifting mechanism 4 as the first embodiment. However, the difference lies in that the body side hitch 73 and the work implement side hitch 66 are integrally formed.

That is, the lifting mechanism 4 is provided with the main body hitch 73.
A connecting cylinder 66e is attached to the rear of the device. 73e
Is a connection hole, 77 'is a spring connection pin, and 165 is a fixing bolt.

In this manner, the connection between the lifting mechanism 4 and various working devices can be easily performed.

[0115]

According to the present invention, the following effects can be obtained.

That is, in the present invention, since the handle is provided at the front of the rotary cover stretched over the rotary case, the rotary device can be easily lifted by gripping the handle, and the rotary device can be easily lifted. Maintenance can be easily performed.

[Brief description of the drawings]

FIG. 1 is a side view of a walking type agricultural work machine according to the present invention.

FIG. 2 is a plan view of the walking-type agricultural work machine.

FIG. 3 is an explanatory side view of the main body of the agricultural working machine.

FIG. 4 is an explanatory plan view of the agricultural working machine main body.

FIG. 5 is a partial cross-sectional view of the rotary cover.

FIG. 6 is a sectional view taken along line II of FIG. 3;

FIG. 7 is a cross-sectional plan view of the handle base body.

FIG. 8 is an end elevation view of the handle base body.

FIG. 9 is an explanatory plan view of a grip portion forming body.

FIG. 10 is an explanatory side view of the grip portion forming body.

FIG. 11 is an explanatory plan view of a transmission guide groove.

FIG. 12 is an explanatory left side view of the lifting mechanism.

FIG. 13 is an explanatory right side view of the main body side hitch.

FIG. 14 is a rear view of the main body side hitch.

FIG. 15 is a rear view of the hanging support.

FIG. 16 is an explanatory side view of the drive case.

FIG. 17 is an explanatory sectional view of the drive case.

FIG. 18 is an explanatory side view of a lifting adjustment interlocking mechanism as a second embodiment.

FIG. 19 is a plan view of the raising / lowering adjustment interlocking mechanism.

FIG. 20 is an explanatory view of mounting a connecting pin.

FIG. 21 is a side view of a walking type agricultural working machine having a hanging support according to a second embodiment.

FIG. 22 is a plan view of the walking-type agricultural work machine.

FIG. 23 is a rear view of the hanging support.

FIG. 24 is a side view of a main body side hitch as a second embodiment.

FIG. 25 is a side view of a main body side hitch as a third embodiment.

26 is a sectional view taken along the line II-II of FIG. 25.

FIG. 27 is a side view of an elevating mechanism as a second embodiment.

FIG. 28 is a plan view of the lifting mechanism.

[Explanation of symbols]

 A Walking type agricultural work machine 1 Farm work machine main body 2 Rotary device 3 Seeding device 4 Elevating mechanism 5 Hanging support

Claims (1)

[Claims] 1. An engine is mounted on a fuselage, and a drive case is continuously provided at a lower portion of the fuselage. The drive case includes a mission case extending rearward and a front case located in front of the transmission case. A rotary case extending downward is integrally formed, and a pair of left and right traveling wheels is attached to a rear portion of the transmission case via an axle, and a handle is extended upward and rearward from the transmission case. , A rotary shaft is provided in the front part of the rotary case so as to penetrate in the left-right direction,
In a walking type agricultural machine in which a plurality of rotary claws are attached to the rotary shaft to form a rotary device, a rotary cover is provided on a rotary case to cover the plurality of rotary claws, and a rotary cover is provided at a front portion of the rotary cover. A walk-behind agricultural work machine having a handle.