JP2002027816A - Structure for slidably supporting mowing implement of mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for slidably supporting a mowing implement, capable of facilitating the mowing operation on the side of a traveling machine body. SOLUTION: This structure for slidably supporting the mowing implement has a switching means for switching the mowing implement 14 for mowing, supported at the lower part of the traveling machine body 6 between a dislocated posture A dislocated and protruded on the side of the traveling machine body 6, and a normal posture N housed in the center side of the traveling machine body 6 so as to be freely switched and so as to be movable in the right and left direction, and a holding means for holding the mowing implement 14 at a prescribed switching position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide support mechanism of a mowing device in a mowing machine for riding or the like.

[0002]

2. Description of the Related Art A conventional mowing machine is provided with a mowing device (rotary cutter or the like) for mowing under a traveling machine, and drives the mowing device and makes the traveling machine travel. It is configured to perform mowing work in the traveling range of the traveling body. However, when performing the work in the mowing work range (cut), the traveling body must travel in a portion close to the above-described working range, and when there is a danger of falling off, the mowing work in the above case may be performed. There was a drawback that it could not be performed smoothly.

[0003]

The slide support mechanism of the mowing device of the mowing machine according to the present invention for solving the above-mentioned problems is provided below the traveling machine body 6 with the mowing device 14 for mowing.
The mowing device 14 is supported so that the mowing device 14 can move left and right, and the mowing device 14 is displaced to the side of the traveling machine body 6 and is stored in the center of the traveling machine body 6 in an offset posture A. A first feature is that switching means for switching the attitude to the normal attitude N and holding means for holding the attitude at a predetermined switching position are provided.

A second feature of the present invention is that the switching means has a structure in which the mowing device 14 is moved in parallel between the eccentric posture A and the normal posture N.

[0005]

1, 2 and 3 are a side view, a plan view and a rear view of a mowing machine according to the present invention. The mowing machine is supported by front and rear wheels 1 and 2 and has a driver's seat 3 on the front side and a rear side. A traveling body 6 is provided with an engine 4. And the above driver's seat 3
Is provided with a front panel 8 having a handlebar 7 at the front, a seat 9 at the rear, and a side panel 11 at the side of the seat 9, and the seat 9 is provided with the engine 4 attached to the rear side of the body frame 6a. It is located forward. The side panel 11 and the front panel 8 are provided with respective operation units described later.

At this time, a transmission case 12 is arranged below the engine 4 and a hydraulic continuously variable transmission (HST) 13 is attached to the transmission case 12 so that the output (drive power) from the engine 4 is HST 13
The transmission is transmitted continuously to the transmission case 12 (transmission) by the HST 13, transmitted to the transmission case 12 (transmission), shifted by the transmission, and output to the front and rear wheels 1, 2 as described later, so that the traveling machine body 6 travels.

The front and rear wheels 1, 2 and the handle 7 are connected and linked by a steering mechanism as described later.
By operating the steering wheel 7 (rotating operation), the front and rear wheels 1 and 2 are given a turning angle to steer the traveling machine body 6. Further, a cutting blade unit 14 as a cutting device is provided below the traveling machine body 6 so as to be slidable up and down and left and right as described later.

The cutting blade unit 14 has a cutting blade 15 rotatably supported therein, and has an engine 4 as described later.
The driving force is transmitted to the cutting blade unit 14 from the
Is rotated to rotate the cutting blade 15 to cut grass and the like (rotary cutter).

[0009] The connection and disconnection of the transmission of the driving force to the cutting blade 15 (cutting blade unit 14) is performed on the side panel 11.
, A shift lever 17 for shifting the transmission 12 (shifting the traveling speed of the traveling machine 6), an up / down adjustment switch 18 for operating the up / down sliding (elevation) of the cutting blade unit 14, and an engine 4 An engine control lever 19 for adjusting the number of revolutions and the like are provided, and an accelerator pedal 22 and a brake pedal 23 are provided so as to be freely depressed from a floor 21 of the traveling machine body 6.

With the above structure, an operator (operator) sits on the seat 9 and operates the cutting blade clutch lever 16 to operate the cutting blade unit 14 (rotate the cutting blade 15). The traveling body 6 is lowered by lowering the height to a level at which it can be reaped, the traveling speed is set and adjusted by the shift lever 17, and the accelerator pedal 22 is depressed to drive the traveling body 6, and the steering wheel 7 is steered to travel the traveling body 6. While doing so, the mowing operation can be performed by the mowing blade unit 14.

The accelerator pedal 22 can be depressed forward and backward from a neutral position. The HST 13 is operated by depressing the accelerator pedal 22, and the traveling machine 6 is moved forward by stepping forward and backward by stepping backward. It has become. When the accelerator pedal 22 is neutralized, the front and rear wheels 1 and 2 are braked via the transmission by the force from the HST 13, but if necessary, the brake can be operated in the transmission by the brake pedal 23.

On the other hand, as shown in FIG. 4, the left and right front wheels 1 are supported by a front axle case 26, the left and right rear wheels 2 are supported by a rear axle case 27, and the front wheel 1 and the rear wheel 2 are provided by a front axle. It is attached to the case 26 or the rear axle case 27 so as to be swingable right and left.

That is, the left and right front wheels 1 are attached to left and right front axle cases 28 rotatably supported by a front axle case 26, and the left and right rear wheels 2 are attached to a rear axle case 2.
7 is rotatably supported by left and right rear wheel axle cases 29.

A front knuckle arm 31 is attached to the left and right front axle cases 28,
Front tie rods 3 on both front knuckle arms 31
2 are connected, and both front tie rods 32 are connected on the pitman arm (not shown) side as conventionally known,
The left and right front wheels 1 are connected to the handle 7 side, and the turning operation of the handle 7 causes the left and right front wheels 1 to swing synchronously, thereby giving an angle of cut.

A rear knuckle arm 33 is attached to the left and right rear wheel axle cases 29, and both rear knuckle arms 33 are connected to left and right rear tie rods 34 via a connection plate 36.
6 is rotatably supported on the rear axle case 27 side. The connecting plate 36 and one front knuckle arm 31L are connected via front and rear rods 37, 38 and an arm 39 connecting the rods 37, 38.

The arm 39 is rotatably supported by the body frame 6a. As a result, the rear wheel 2 is also swung in conjunction with the swing of the front wheel 1, that is, the front wheel 1 and the rear wheel 2 are swung in synchronization with the turning operation of the handle 7 to give a turning angle, and travel. The steering of the body 6 is performed by four-wheel steering (4WS), and the above-described steering mechanism is configured as described above.

The front wheel 1 is driven by the steering mechanism.
Slip of the rear wheel 2 due to only steering is eliminated, steering is smooth even on a wet road surface, and the steering performance such as relatively small turning is improved. Since the steering can be easily performed, the traveling body 6 can be easily handled, and the mowing operation can be easily performed.

In the steering mechanism, the turning angle of the rear wheels 2 is set to be smaller in phase with the turning angle of the front wheels 1, so that a sharp turn or the like is avoided. The front and rear rods 37 and 38 and the arm 39 in the steering mechanism are disposed so as to be deviated in the left-right direction (left side) with respect to the center of the traveling body 6 in the left-right direction in plan view.

On the other hand, the output (driving force) from the engine 4 is
Output pulley 4 attached to output shaft 4a of engine 4
1 to HST 13 and a gear case (output gear case) 42 for outputting a driving force to the cutting blade unit 14 fixedly provided on the side of the machine frame 6a, so as to be outputted via belts 43 and 45. A belt 43 is provided between the output pulley 41 and the HST pulley 44 attached to the input shaft 13a of the HST 13, and a belt 43 is provided between the output pulley 41 and an input pulley 46 attached to the input shaft of the output gear case 42. Between each is hung.

A running idler 47 is mounted on the belt 45.
A cutting blade idler 48 is provided on the belt 43, and a clutch arm 49,
When the engine 4 is driven by the traveling idler 47, the driving force is constantly transmitted from the engine 4 to the HST 13, and the driving idler 48 drives the output gear case 42 by operating the cutting blade idler 48. The power transmission is turned on and off.

That is, the cutting clutch 52 (clutch arm 51) is connected to the above-mentioned cutting clutch lever 16 by forming a cutting clutch 52 for turning on and off the transmission of the cutting driving force by the cutting blade idler 48, the clutch arm 51 and the like. ing. When the cutting clutch lever 16 is operated to the entry side, the cutting clutch 52 is engaged and the driving force is transmitted to the cutting blade unit 14, and when the cutting clutch lever 16 is operated to the cutting side, the cutting clutch 52 is operated to cut and the cutting blade unit 14 side The transmission of the driving force to the motor is cut off.

On the other hand, the rear axle case 27 is formed integrally with the transmission case 12, and the output from the transmission is applied to the rear axle case 2 shown in FIG.
7 is directly output to a differential device 53 in the rear wheel 7 so as to drive the rear wheel 2. An output shaft 54 for driving the front wheels is projected forward from the transmission case 12 side, and the mowing machine has four wheels in which the front wheels 1 are driven by the driving force from the output shaft 54 together with the rear wheels 2. Drive (4WD) is configured.

In the rear axle case 27, a rear wheel axle case 29 is rotatably supported on the end of a horizontal case 56 in the left and right direction via a pin 57 in a left and right direction, and is protruded from a differential device 53. Output shaft 5
8, a rear wheel axle case 29 mounts the rear wheel 2a of the rear wheel 2 via a wheel boss 59, and the output shaft 58 and the axle 61 are connected by a universal joint 62. It is supported by.

The wheel boss 59 is supported (attached) to a drive shaft 61 so as to transmit a driving force, and is rotatably supported by a rear wheel axle case 29 via a bearing 63. As a result, the rear wheel 2 is driven via the differential device 53.

At this time, the end of the wheel boss 59 on the rear wheel axle case 29 side is supported by a stepped support portion 64 formed on the rear wheel axle case 29, whereby grass or the like to the wheel boss 59 side is provided. Is prevented, and it is not particularly necessary to provide a part or the like for preventing winding.

On the other hand, the body frame 6a is located between the front and rear wheels 1 and 2.
A relay (bearing) case 66 for relaying driving force from the output shaft 54 for the front wheel 1 to the front axle case 26 is provided on the left and right frames 6H. I have. The front axle case 26 has an input shaft 6 for driving force input.
7 is projected rearward.

The input shaft 67 and the relay case 66 are connected by a first transmission shaft 71 via a universal joint 68, and the output shaft 54 and the relay case 6 are connected.
6 are connected by a second transmission shaft 72 via a universal joint 69, whereby the output shaft 54 (the transmission case 12 side) is driven to the input shaft 67 (the front axle case 26 side) via the relay case 66. Power is transmitted.

Although a detailed description of the structure of the front axle case 26 is omitted, a driving force is transmitted to the left and right front wheels 1 via a differential device by a driving force input from an input shaft 67 by a conventionally known structure. , The left and right front wheels 1 are driven.

At this time, the relay case 66 is disposed at a position higher than the front axle case 26 and the rear axle case 27 (the projecting positions of the input shaft 67 and the output shaft 54), and both transmission shafts 71 and 72 are viewed from the side. To form a chevron with the relay case 66 as the top. That is, the first transmission shaft 71 and the second transmission shaft 72 are connected to the relay case 6 as a connecting portion.
6 are connected so as to form a chevron.

That is, the four-wheel drive mechanism is constituted as described above, and the transmission case 1 in the four-wheel drive mechanism is provided.
Front axle case 26 located far from
A far transmission portion for transmitting the driving force to the transmission case (located at a farther distance from the transmission case 12 than the rear axle case 27) includes a first transmission shaft 71, a second transmission shaft 72, a relay case 66, and the like. And the first transmission shaft 71 and the second transmission shaft 7
2 are formed in a mountain shape in a side view.

For this reason, a relatively large space is formed below the relay case 66, and a sufficient space is provided for installing the cutting blade unit 14 and the 4WS transmission mechanism (the front and rear rods 37 and 38 and the arm 39, etc.). Is secured. And the cutting blade unit 14 and the front and rear rods 37, 38
And the arm 39 are arranged in the space, so that the mower of the present invention can
Although the WD and 4WS mechanisms are mounted on the lower side of the traveling body 6, an increase in the vehicle height (floor 21) more than necessary is suppressed.

As described above, the front and rear rods 37, 38 and the arm 39 in the 4WS are disposed on the left side of the center of the vehicle body in the left-right direction in plan view of the traveling body 6, but the transmission shaft 71, 4WD for the 4WD. 72 and the relay case 66 are arranged near the center line of the traveling machine body 6 in the left-right direction in plan view, and the drive system of the cutting blade unit 14 is arranged near the center line of the traveling machine body 6 in the plan view as described later. Therefore, an arrangement that requires more space in the vertical direction of each part than necessary is avoided.

On the other hand, as shown in FIGS. 1 and 6, between the traveling body 6 and the cutting blade unit 14, a rectangular shape in plan view, which is supported on the body frame 6a so as to be vertically movable as described later, is provided. Is provided, and the cutting blade unit 14 is attached to the frame 76.

At each vertex of the frame 76, an arm 77 is rotatably supported.
Is rotatably supported on the upper surface of the cutting blade unit 14, whereby the cutting blade unit 14 is moved in parallel to the left and right along an arc trajectory. The traveling body 6 of the unit 14 in plan view
The posture can be switched between a deviated posture A that is deviated and protruded to the side of the (frame body 76) and a normal posture N stored at the center side of the traveling machine body 6.

At this time, the engagement recess 78 for engagement is
The engaging handle 78 provided with the engaging recess 78 a of the engaging handle 78 is disposed on the upper surface of the cutting blade unit 14. By engaging the pin 79 or 81 with the pin 79, the position (posture) of the cutting blade unit 14 with respect to the frame 76 can be fixed.

That is, the engaging handle 78 is engaged with the engaging recess 78.
a is swingably attached to the frame body 76 so that engagement and disengagement of the pin 79 and the pin 79 or 81 can be performed, and the engagement handle 78 (the engagement recess 78 a) and the pins 79 and 81 are used. When the cutting blade unit 14 is in the eccentric posture A or the normal posture N
A holding means for holding at any one of the switching positions (postures) is provided. The engaging concave portion 78a is engaged with the pin 79, and the engaging concave portion 78a is engaged with the pin 81. The posture (switching position) is held in the posture A.

Thus, the mowing work is performed in the central portion of the mowing work range with the cutting blade unit 14 in the normal working posture N, so that a predetermined range of mowing work corresponding to the traveling of the traveling machine body 6 is performed. At the time of cutting, the cutting blade unit 14 is displaced A
By performing the mowing operation as above, the mowing operation can be performed without moving the traveling machine body 6 at a position closer to the above than necessary, and the mowing operation can be performed smoothly.

Further, since the cutting blade unit 14 is moved in parallel from side to side along the circular arc locus, the cutting amount corresponding to the traveling of the traveling machine body 6 is the same regardless of the posture of the cutting blade unit 14, The mowing efficiency in the eccentric posture A is prevented from lowering, and it is not necessary to make the traveling machine body 6 run longer than necessary in the mowing operation at the time of mowing.

On the other hand, as shown in FIGS.
In the left and right front and rear frames 76L and 76R, arms 81 and 82 are pivotally supported and provided at the front and rear, respectively.
At the left frame 6L or the right frame 6R. The left and right front and rear arms 81 and 82 and the right and left front and rear arms 81 and 82 are connected via a rod 83, that is, the frame body 76 is connected to the front and rear arms 81 and 82.
Are supported on the left and right sides of the traveling body 6 (body frame 6a) so as to be vertically movable via a parallel link 84 composed of a rod 83 connecting the two arms 81 and 82.

At this time, the left and right rear arms 82 are
Frame 6 (left and right frames 6L, 6L)
R), the rotation rod 86 and the rear arm 82 are connected to a rotation rod 86 rotatably supported by the rotation rod 86. The arm 87 and the rear arm 82 are connected via a connecting arm 88.

The pivot rod 86 has a bracket 8 at its end.
9 is integrally fixed to the bracket 89, and the telescopic rod 91a of the electric cylinder 91 as an actuator is fixed to the bracket 89.
Are connected. The main body side of the electric cylinder 91 is pivotally supported on the body frame 6 side. The electric cylinder 91 is driven by the main body side to extend and retract the extendable rod 91a to adjust the stroke steplessly. The left and right rear arms 8 are rotated through the arms 87 and 88 by the rotation of the rotation rod 86.
2 is swung, and the frame 76 is vertically moved up and down with respect to the body frame 6 via the parallel link 84.

At this time, the cutting blade unit 14 is attached to the frame 76 so as to be movable left and right as described above, and the cutting blade unit 14 and the frame 76 are integrated in the vertical direction. The cutting blade unit 14 is vertically moved up and down steplessly by the drive of the 91 (the stepless expansion and contraction of the telescopic rod 91a).

The bracket 89 and the electric cylinder 91
The pin 92 provided on the side of the telescopic rod 91a is connected to the pin 92 provided on the side of the bracket 89 by an elongated hole 93 into which the pin 92 is inserted, and the cutting blade unit 14 ( The frame body 76) is raised by extending and retracting the telescopic rod 91a by the electric cylinder 91 to bring the pin 92 into contact with the end (rear end) of the elongated hole 93. The lowering of the frame body 76) is performed by contracting the telescopic rod 91a by the electric cylinder 91 and separating the pin 92 from the end of the elongated hole 93,
This is performed by lowering the frame body 76 and the cutting blade unit 14 and the like under their own weight so that the pins 92 and the ends of the elongated holes 93 abut.

That is, the cutting blade unit 1 set at a predetermined height by the electric cylinder by the pin 92 and the elongated hole 93
An accommodating mechanism is configured to allow the pin 4 to move upward, and the blade unit 14 can move upward by a predetermined amount (a predetermined stroke) within a range in which the pin 92 moves in the elongated hole 93. ing.

A shock absorber (damper) 94 is interposed between the body frame 6 and the rotating rod 86, and the damper (shock absorber) 94 raises the cutting blade unit 14 to the cutting blade unit 14. When a force is exerted to make the blade unit 1 work on a stone or the like during mowing work, for example.
When the vehicle 4 rides on the vehicle, the above-mentioned accommodation mechanism allows the damper 9
4 elastically allows the cutting blade unit 14 to rise, and when the force is released, returns the position of the cutting blade unit 14 elastically.

That is, the cutting blade unit 14 is
The blade unit 14 is supported on the side so as to be freely damped (cushioned) so that the cutting blade unit 14 comes into contact with a stone or the like (rides up) during work, and even if a force in an upward direction acts on the cutting blade unit 14, the damper is supported. 94 dissipates the energy at the time of contact, prevents trouble such as damage to the cutting blade unit 14 side at the time of contact with an obstacle such as a stone of the cutting blade unit 14, and performs a stable mowing operation. it can.

Further, as described above, the cutting blade unit 14 can adjust the stroke of the telescopic rod 91a in a stepless manner and adjusts the elevation by the electric cylinder 91 which can be operated electrically, so that the traveling machine body 6 (ground) of the cutting blade unit 14 is used. The height of the mowing work can be easily set in a stepless manner, and the mowing work is improved by lowering the mowing blade unit 14 to a predetermined height as shown in FIG. Mowing work can be performed.

Since the arrangement space of the cutting blade unit 14 is relatively large as described above, the height adjustment range of the cutting blade unit 14 can be made larger, and the above-described vertical up / down and left / right parallel movement mechanism and the like can be provided. Can be easily arranged.

On the other hand, as described above, the height of the cutting blade unit 14 is adjusted by turning on and off the up / down adjustment switch 18. The cutting height switch 18 drives the electric cylinder 91 to adjust the expansion and contraction of the telescopic rod 91a. The extension and contraction of the telescopic rod 91a (the cutting blade unit 14
Can be easily set.

The rotating rod 86 is also provided with an interlocking bracket 97 that engages with the cutting blade clutch lever 16, and lowers the cutting blade unit 14 to the cutting position P where the mowing work is performed as shown in FIG. When the mowing operation is performed and the mowing blade unit 14 is moved upward to the non-cutting position R where mowing is not performed, as shown in FIG. By operating the cutting blade 16, the cutting blade 15 is rotated (the driving force is transmitted to the cutting blade unit 14). From the entering position Q, the rotation of the cutting blade 15 is stopped (the transmission of the driving force to the cutting blade unit 14 is stopped). ) It is configured to automatically switch to the cutting position S.

FIG. 1 shows a front panel 8 of the driver's seat 3.
As shown in FIG. 1, a display device (height monitor) 98 for displaying the height (up and down position) of the cutting blade unit 14 is provided. By looking at the monitor 98, the height of the cutting blade 15 can be easily confirmed. In particular, since the height monitor 98 is disposed on the front side, the height of the cutting blade 15 (cutting blade unit 14) can be easily checked without substantially turning the eyes of the worker (the driver). .

At this time, the cutting blade unit 14 is
As shown in (a), (b), and (c), a moving body 101 slidably attached to the left and right provided with an instruction arrow 98a described by a description or the like, and connected to the moving body 101. Operating arm 103 rotatably supported on the front panel side (main body 102 of height monitor 98)
, A drive arm 106 integrally fixed to a rotation fulcrum shaft 104 of the operation arm 103, a torsion spring 107 externally fitted to the rotation fulcrum shaft 104 and a meter 108 provided on the main body 102 side, and the like. Have been.

The drive arm 106 is connected to the arm 109 fixed to the above-mentioned rotating rod 86 via a wire 111, and as described above, the rotating rod 86 is rotated to move the cutting blade unit 14 up and down. Then, the rotating rod 8
6 and the drive arm 10 via the wire 111
6 is swung, whereby the moving body 101 is slid via the operation arm 103.

As a result, the position (place) of the meter 108 indicated by the arrow 98a of the moving body 101 changes, whereby the height of the cutting blade unit 14 can be displayed. The moving body 101 is a torsion spring 107
The arrow 98a is urged so as to point to the lower side of the meter 108 (the descending direction of the cutting blade unit 14), so that the height of the cutting blade unit 14 is lowered. Can be indicated (displayed) relatively accurately.

On the other hand, as shown in FIGS. 1 and 6, the output gear case 42 for outputting the driving force from the engine 4 to the cutting blade unit 14 is provided on the body frame 6a side as described above.
Although the output gear case 42 is provided, the output gear case 42 is provided to be deviated leftward with respect to the output shaft 4a of the engine 4 (the output position of the engine 4). An input gear case 112 for inputting a driving force is provided on an upper surface of the cutting blade unit 14, and an output shaft 113 protruding from the output gear case 42 and an input gear case 1.
An input shaft 114 protruding from 12 is connected by a transmission rod 117 via a universal joint 116 to form a transmission mechanism between the cutting blade unit 14 and the engine 4 side (output gear case 42).

At this time, the transmission rod 117 is connected to the outer cylindrical portion 11 connected to the output shaft 113 as shown in FIGS.
8 connected to the input shaft 114 side, and
And a rod portion 119 which is inserted into the outer cylinder portion 118 to allow the transmission of the driving force in the rotation direction, and which is an insertion shaft which is slidable and slidable with respect to the outer cylinder portion 118. I have.

Thus, the cutting blade unit 14 can be vertically moved up and down and horizontally slid by the rod portion 119 (the transmission rod 1).
17), the transmission of the driving force can be performed stably without extremely changing the transmission efficiency of the driving force when the cutting blade unit 14 slides left or right or up and down. In other words, the cutting blade unit 14 can be moved up and down or moved left and right without changing the transmission performance of the driving force.

As shown in FIG. 6, the clutch arm 51 and the blade clutch lever 16 are connected via a wire 121. Further, as shown in FIG. 1, the transmission rod 117 may be used by connecting the rod portion 119 to the output shaft 113 side and the outer cylinder portion 118 to the input shaft 114 side. Further, as described above, the output gear case 42 is displaced to the left with respect to the output shaft 4a (output pulley 41) of the engine 4, and the input gear case, the output gear case, and the output shaft of the engine (output pulley 41) are bent straight. Since the transmission rod 117 is disposed on the upper side, the length of the transmission rod 117 is relatively long, the expansion and contraction is performed stably, and the bending of the universal joint 116 is performed stably.

On the other hand, as shown in FIG.
Reference numeral 6 denotes a two-stage pulley in which two pulleys 46U and 46D are stacked one above the other, and the upper pulley 46U is connected to the output pulley 41 by a belt as shown in FIGS. The pulley 46D is provided with a brake arm 123, which is pivotally supported so as to be able to approach and separate from the pulley 46D, and has a brake shoe 122 mounted opposite to the pulley 46D. The brake arm 123 is supported by the same support shaft as the clutch arm 51.

The brake arm 123 is actuated by a spring
Is pressed against the peripheral surface of the lower pulley 46D to function as a brake for stopping the rotation of the input pulley 46, and the brake is activated when the transmission of the driving force to the cutting blade unit 14 is cut off. It is configured.

That is, the cutting blade clutch lever 16 and the brake arm 123 are connected by the wire 126 so that the brake is activated when the cutting blade clutch lever 16 returns to the cut position S. Thus, when the transmission of the driving force to the cutting blade unit 14 is stopped, the cutting blade (the cutting blade unit 14) can be stopped in a shorter time after the operation of the cutting blade clutch by the brake operation.

As described above, the cutting blade unit 14, the lifting and lowering of the cutting blade unit 14 and the left and right parallel movement mechanism, 4WD, 4W are provided in the space below the traveling body 1 (body frame 6a).
Since the S transmission mechanism, the transmission mechanism of the driving force to the cutting blade unit 14 and the like are arranged, the 4WD far transmission section is formed in a mountain shape by the first transmission shaft 71 and the second transmission shaft 72, and Although the space is relatively large as described above, it is necessary to make the space below the traveling body 1 (body frame 6a) for arranging each part larger, and compared to the conventional riding mower, To secure space, the vehicle height (total height) is inevitably increased (total height is increasing).

Therefore, as shown in FIGS. 1 to 3, the fuel tank 127 is provided on one side of the engine 4 (the right side in the present embodiment), and the fuel tank 127 is provided on the other side (the left side in the present embodiment). ), An oil tank 128 for the HST 13 is disposed above the engine, the fuel tank 127 and the oil tank 1.
28 is covered with a side cover 129.

At this time, the side surface 12 of the side cover 129
Reference numeral 9a is inclined inward toward the upper end so that the traveling body 6 has a substantially trapezoidal shape in a rear view. Thereby, the height above the body frame 6a is configured to be low, and even when the space below the body frame 6a is relatively large as described above, the traveling body 6 (mower)
Does not rise more than necessary, and stable running of the traveling body is ensured.

In other words, by disposing the fuel tank 127 and the oil tank 128 on the side of the engine 4 as described above, the height (total height) of the traveling machine body 6 can be increased without increasing the vehicle height (total height) more than necessary. It is possible to secure a sufficient space below for the components such as the traveling drive system and the drive support system of the cutting blade unit 14, and to relatively restrict the arrangement and structure of the cutting blade unit 14 and the drive system. Since the size of the mowing machine can be reduced, the functions such as traveling and steering of the traveling machine body 6 and driving and support of the cutting blade unit 14 are multifunctional as described above, so that it is easy to improve the performance of the mower. It can be carried out.

Further, the inclined structure of the side cover prevents, for example, when mowing work in an orchard or the like, the branches or the like from contacting the traveling machine body 6 during work traveling or the like, and obstructs the traveling machine body. And the side of the engine 4 (the fuel tank 127 and the oil tank 128).
Is covered with the side cover, so that an obstacle such as a branch is prevented from entering the engine 4 from the side of the traveling machine body 6.

On the other hand, since the fuel tank 127 is arranged on one side of the engine 4 and the oil tank 128 is arranged on the other side, the right and left weight balance of the traveling machine body 6 is relatively good. Alternatively, when the oil tank 128 is unnecessary (for example, when the HST 13 has a larger capacity), the fuel tank 128 may be disposed on both sides of the engine 4, or a part or the like which has been disposed vertically in the related art may be used. It can be moved to the side of the engine 4, etc.
Further, the overall height of the traveling machine body 6 (mower) can be reduced.

By providing the oil tank 128 of the HST 13 on the side of the engine as described above, a smaller HST (which is cheaper) can be adopted for an engine having a relatively large output. The right and left weight balance of the body 6 can be kept relatively good.

[0069]

According to the structure of the present invention constructed as described above, the mowing operation is performed in the central portion of the mowing operation range by setting the mowing device to the normal working posture, thereby achieving the predetermined range corresponding to the traveling of the traveling machine body. The mowing work is performed, and the mowing part in the mowing work range is performed by setting the mowing device to the eccentric posture to perform the mowing work so that the traveling machine is not moved at a position closer to the necessity than necessary. Therefore, there is an effect that the mowing work can be performed smoothly.

Further, by moving the reaper parallel to the left and right in both postures, the reaping amount for traveling of the traveling body is almost the same regardless of the posture of the reaper.
There is an advantage that it is possible to prevent a decrease in the mowing efficiency in the eccentric posture.

[Brief description of the drawings]

FIG. 1 is a side perspective view of a mower.

FIG. 2 is a plan view of the mower.

FIG. 3 is a rear view of the mower.

FIG. 4 is a plan perspective view mainly showing a traveling transmission system of the mower.

FIG. 5 is a rear sectional view of a main part of a rear axle case.

FIG. 6 is a plan perspective view mainly showing a left and right parallel movement of a mowing transmission system and a cutting blade unit of the mower.

FIG. 7 is a plan view mainly showing a supporting state of the cutting blade unit.

FIG. 8 is a left side view mainly showing a supporting state of the cutting blade unit.

FIG. 9 is a right side view mainly showing a supporting state of the cutting blade unit.

FIG. 10 is a right side view of a cutting blade unit disposed at a cutting position.

FIG. 11 is a plan view of a front panel provided with a height monitor.

12A, 12B, and 12C are a plan view, a side view, and a front view of the height monitor.

FIG. 13 is a side view of an input pulley portion.

[Explanation of symbols]

 6 Traveling body 14 Cutting blade unit (reaper) A Deflected posture N Normal posture

Claims (2)

[Claims] 1. A mowing machine provided with a mowing device (14) for mowing below a traveling machine (6). The mowing device (14) is supported so as to be movable left and right, and the mowing device (14) is mounted on the traveling machine ( (6) a switching means for switching the attitude between a deflected attitude (A) protruding laterally and a normal attitude (N) stored on the center side of the traveling body (6), and a predetermined switching position. A slide support mechanism for a mowing device in a mower provided with holding means for holding. 2. The slide support mechanism of a mowing device according to claim 1, wherein the switching means has a structure for causing the mowing device (14) to move in parallel between the deviated posture (A) and the normal posture (N).