JPH09107741A - Agricultural working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural working machine excellent in maintenance such as change of wheels, alteration of treads, etc. by installing stands which are grounded when wheels are located at an unused position at a high side, at a front and a rear positions of a machine body and stabilizing a parking state in an unused state. SOLUTION: This agricultural working machine is provided with four wheels 1 and 2 at front and rear and right and left positions of a machine body 6 anal with stands F and R which vertically liftably support these wheels 1 and 2 between a used position at a lower side and an unused position at an upper side and are grounded when these wheels 1 and 2 are located in the unused position at the upper side, at the front and the rear positions of the machine body 6. The machine body 6 is set freely slidably in the width direction on a frame 3 supporting the wheels 1 and 2, the stand F at the front side holds the frame 3 at a front part so as to stand up the frame to an upper side. A slide position detector D for indicating the slide position of the machine body 6 from the frame 3 is preferably installed between the front stand F and the machine body 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a relatively small and lightweight agricultural working machine such as a walk-behind transplanter and a management machine.

[0002]

2. Description of the Related Art Conventionally, this type of small and lightweight agricultural work machine is
Most of them are two-wheel type with a pair of left and right drive wheels.
In particular, a vehicle with improved running stability includes a four-wheel type vehicle having another pair of left and right auxiliary wheels in front of or behind a pair of left and right drive wheels.

The stand is mainly used in the case of a two-wheel type from the viewpoint of protection from the fall of the body, and is provided at the front or rear of the body of such a two-wheel type, and is a four-wheel type that can stand by itself. It is rarely used in things.

[0004]

As described above, in general, a four-wheeled vehicle does not have a stand, and in that state, the vehicle body cannot be parked securely during non-working. There is a problem that parking aids such as car stops must be prepared separately.

Further, even if the vehicle is parked by using a car stop or the like, the height of the vehicle is high and the position of the center of gravity is high, so that the airframe is unstable. Therefore, it is necessary to pay particular attention when transporting by truck. Further, when the wheels are detached or attached for wheel replacement or tread change, it is necessary to jack up and support the machine body, resulting in a problem that the work is complicated.

An object of the present invention is to provide a four-wheel type vehicle,
It is a point to provide an agricultural working machine that can secure a parking state when not in use with good stability and improve maintainability such as wheel replacement and tret change.

[0007]

In order to achieve the above object, the invention according to claim 1 is provided with four wheels 1, 1, 2, 2 on the front, rear, left and right sides of the machine body 6, and these wheels 1, 1, 2,
2 is vertically movably supported between a lower side use position and an upper side non-use position, and the wheels 1, 1, 2, 2 are positioned at the upper side non-use position at the front and rear positions of the machine body 6. In this case, the stands F and R for grounding are provided.

According to the second aspect of the present invention, the machine body 6 can be further slidably displaced in the width direction with respect to the undercarriage so that the width of the work such as changing the planted seedling row in the transplanter can be expanded. In addition, in order to allow the operator to easily recognize the slide position of the machine body 6 in this case,
Is provided slidably in the width direction with respect to the frame 3 supporting the wheels 1, 1, 2 and 2, and the front side stand F is supported so as to be erected upward on the front side of the frame 3. , Between the front stand F and the aircraft 6,
A slide position detector D indicating the slide position of the machine body 6 with respect to the frame 3 is provided.

[0009]

According to the first aspect of the invention, the four wheels 1, 1, 2, 2 on the front, rear, left and right are located in the upper non-use position, and the wheels 1, 1, 2, 2 are mounted on the body 6 The front and rear stands F and R are grounded in this state while the vehicle height of the machine body 6 is lowered. This makes it possible to ensure a stable and secure parking state when not in use, and
The maintainability such as wheel replacement and tread change can be improved.

According to the second aspect of the present invention, by sliding the machine body 6 in the width direction with respect to the frame 3 supporting the wheels 1, 1, 2, 2, for example, in a transplanter, a single row of ridges straddling the left and right wheels. On the other hand, it is possible to expand the width of the work by, for example, planting a plurality of rows of seedlings on one ridge by traveling back and forth or by traveling a plurality of times. The slide position of the machine body 6 with respect to the frame 3 is in an upright state, and the slide position detector D provided between the front side stand F supporting the front part of the frame 3 serving as the base and the machine body 6 that slides. This can be recognized by the operator, and the work of sliding the machine body 6 can be favorably performed.

[0011]

1 to 3 show a transplanting machine according to the present invention, which has a pair of front wheels 1, 1 and rear wheels 2, 2 on both front, rear, left and right sides. It is composed of a frame 3 supported by wheels 1 and 2, and a machine body 6 equipped with an engine 4, a transplant portion 5 and the like.
It is configured to be supported slidably in the machine width direction.

As shown in FIG. 2, the frame 3 extends in the longitudinal direction of the machine body and has first and second rods 31 and 32 arranged on both left and right sides in the width direction with a space wider than the width of the machine body.
A third rod 33 in the longitudinal direction of the machine body, which is arranged near the second rod 32 at an intermediate portion between the rods 31 and 32, and a straight rod shape fixed to the front end side in the longitudinal direction of each rod 31, 32, 33. First slide rail 34 and the rods 31, 32,
It is fixed to the rear end side in the length direction of 33 and is configured in a frame shape from the first slide rail 34 and a second slide rail 35 extending in parallel.

Each of the rods 31, 32, and 33 has a shape that extends horizontally from the front end side in the longitudinal direction toward the rear side, and a front side plate 36 is fixed to the front end side thereof. The first slide rail 3 is provided between the side plates 36.
4 is pierced and supported, and a rear side plate 37 is fixed to the rear end side, and the second slide rail 35 is fixedly supported between the rear side plates 37. , 35 and the rods 31, 32, 33 are integrally coupled to form a frame.

Further, the first slide rail 34 of the front side plate 36 fixed to the front end side of the first rod 31.
A support portion 12 extending outward in the width direction of the machine body is provided on the lower side of the support portion in the above, and the upper end side boss portion 13 of the support arm 12 that supports the left front wheel 1 via the support portion 11.
I support. Also, the second and third rods 32, 3
A support portion 14 that extends outward in the vehicle width direction concentrically with the support portion 11 is provided below the support portion of the first slide rail 34 of the front side plate 36 that is fixed to the front end side of the support member 3.
The upper end side boss portion 16 of the support arm 15 that supports the right front wheel 1 is supported via the support portion 14. These left and right front wheels 1, 1 are, as shown in FIG.
The tread can be changed by reversing the receiving direction of the boss portions 13 and 16 with respect to the support portions 11 and 14. In addition, the end receiving shaft portion 14a of the support portion 14 that supports the right front wheel 1 has the base tubular portion 14b.
On the other hand, the pins and bolts are attached and detached to allow expansion and contraction, and the tread can be changed by changing the protruding length.

On the other hand, below the rear side plate 37 fixed to the rear end side of the first rod 31, the end connecting portion 23 of the transmission case 21 of the left rear wheel 2 is received and supported,
The left end of the output shaft 7 in which the flexible tube 25 is fitted over the left rear wheel 2 is interlocked. Also, the second
Below the rear side plate 37 fixed to the rear end side of the rod 32, the end connecting portion 24 of the transmission case 22 of the right rear wheel 2 is provided.
The right tread 2 has a tread adjusting portion 26 having inner and outer cylindrical portions 26a and 26b which are extendable and retractable.
The right end of the output shaft 7 is interlocked via the. An axle 20 is provided on each of the transmission cases 21 and 22 so as to project inward and outward so that the receiving direction of the rear wheels 2 and 2 can be reversed. Thus, in combination with the adjustment of the protrusion length of the right rear wheel 2 at the tread adjusting portion 26, the tread can be appropriately adjusted in the same manner as the front wheel side.
By changing the position of the frame 2 with respect to the frame 3 in the machine width direction, the tread can be freely changed according to the width of the furrow.

Further, on the front side of the engine 4 in the machine body 6, a substantially U-shaped first bracket 61 whose lower side is opened is attached via a connecting body 60 extending forward from the machine body 6, and the bracket 61 is attached. A plurality of rolling elements 62 slidably contacting the outer peripheral upper and lower portions of the first slide rail 34 are rotatably supported inside the left and right upper and lower portions, and a substantially box-shaped second body 62 is provided on the rear side of the machine body 6. Bracket 63
And a plurality of rolling elements 6 slidably attached to the upper and lower outer peripheral portions of the second slide rail 35 inside the bracket 63.
4 is rotatably supported, and the rolling bodies 62 and 64 provided on the first and second brackets 61 and 63 are rolled along the slide rails 34 and 35, respectively, and the body 6 is moved in the body width direction. Slide it to
By doing so, the entire body 6 is replaced by the frame 3
On the other hand, it is possible to smoothly and smoothly reciprocate in the machine width direction.

Between the frame 3 and the machine body 6,
A reciprocating device 8 for moving the machine body 6 in the machine width direction with respect to the frame 3 side is provided. The reciprocating device 8 includes a hydraulic cylinder 81 connected via a hydraulic pipe to a hydraulic pump 80 arranged near a mounting portion of the engine 4 in the machine body 6, and a mounting body 36a mounted to the frame 3 and the machine body. It is composed of a swing arm 83 which is interposed between a slot-shaped receiving body 87 attached to 6 and is swingable by the reciprocating movement of a piston rod 82 extending from the cylinder 81. The slot-shaped receiving body 87 is arranged at a substantially center of gravity of the machine body 6.

Then, pressure oil is supplied to and discharged from the hydraulic pump 80 into the cylinder 81, and the piston rod 8
By moving the 2 forward and backward, the swing arm 83 is swung, and the first rod 3 arranged on the left side of the frame 3 is moved.
1 and a position closer to the third rod 33 disposed in the widthwise intermediate portion of the frame 3, that is, a center position of the frame 3, the machine body 6 Can be slid in the machine width direction.

Further, as described above, when the hydraulic cylinder 81 is used as the reciprocating device 8 for sliding the machine body 6 with respect to the frame 3, the transplanter is equipped with the hydraulic pump 80 as a hydraulic source. Since the hydraulic cylinder 81 is normally used, this hydraulic power source is used, and by doing so, the hydraulic cylinder 81 can be made lighter and less costly without increasing the weight of the airframe and complicating the configuration. Thus, the slide operation on the frame 3 of the machine body 6 can be performed.

In order to absorb the displacement in the width direction of the engine 4 due to the sliding of the machine body 6 and transmit the output shaft 7 to the left and right rear wheels 2, 2, an interlocking unit 700 having a drive gear 75 for inputting the power of the engine 4 is received. And the left and right inner shafts 71, 72 forming the output shaft 7, the sleeve 7 having a spline portion.
It is interlocked via 3,74. Left and right side clutches 76, 77 are provided on the left and right of the drive gear 75 to independently turn on / off the power transmission to the left and right rear wheels.

In the space formed between the second rod 32 and the third rod 33 of the frame 3 on which the machine body 6 does not slide, the reciprocating device 8 is operated by the hydraulic pump 80.
Lifting cylinder 10 operated together with the hydraulic cylinder 81 of
0 is provided so that the height of the front and rear wheels 1, 2 can be adjusted up and down by the reciprocating movement of the piston rod 101 provided in the cylinder 100.

That is, on the rear side of the second slide rail 35 in the frame 3, a shaft rod 102 extending in parallel with the slide rail 35 is erected and supported, and one end in the longitudinal direction of the shaft rod 102 is used to connect the piston rod 101. A connecting rod 103 to which the tip side of the rod 101 is connected at a portion facing the
And the first and second rods 104 and 105 are provided at both ends of the shaft rod 102 respectively.
4, 105 are connected to front, rear, left and right swing pieces 106, 107, 108, 109 projecting on the swing support shafts of the front and rear wheels 1, 2 via connecting rods 110, 111, 112, 113, The front and rear wheels 1 and 2 are optional within a range between a lower use position shown by solid lines in FIG. 1 assuming work traveling and the like, and an upper non-use position shown by imaginary lines assuming storage and maintenance. It can be moved up and down at the height of.

The transplanting section 5 provided in the machine body 6 has an upper seedling receiving position and a lower seedling planting position where power is transmitted through a planting transmission case 51 provided on the rear side of the machine body 6. Bucket-like transplanting claws 53 made up of two pieces that can be opened and closed back and forth between them, a transport section 54 for transporting a seedling tray T having a plurality of pot seedling storage sections, and a transport section 54 for transporting the seedling trays T. The seedling take-out claw 55 is configured to take out the potted seedling from the seedling accommodating portion of the seedling tray T and release the taken-out seedling into the transplanting claw 53 that stands by at the seedling receiving position.
In addition, 58 is a multi-cutter 58 and 59 for opening a transplant hole in the multi-film covered on the ridge, and 59 is a culture soil ring cultivated in pot seedlings planted in the ridge A by the transplant claw 53.

Left and right handle frames 910 and 920 are provided behind the machine body 6 so as to bypass the transport section 54. The left and right handle frames 910 and 92 are provided.
The receiving portions 930 and 940 having a U-shaped cross section are respectively coupled to the rear end portions of 0, and the square pipes forming the front proximal end side bar 9a of the handle operating portion 9 are inserted into the respective receiving portions 930 and 940. The entire handle operating section 9 is slidably fixed to the left and right of the machine body 6 by tightening and loosening the bolts 950 and 960. Incidentally, 970,
Reference numeral 980 denotes a slide positioning stopper, and in this embodiment, the handle operating portion 9 is slidable at two positions, that is, the central position shown in FIG. 6 and the offset position shown in FIG.

The handle operating portion 9 is provided with an operating end side bar 9b on the rear side thereof in a loop shape, and the left and right side clutch levers 91, 92 and the main clutch / brake lever 93 for turning on / off the take-out output of the engine 4. , A planting clutch lever 94 for turning on and off the power of the planting transmission case 51, and an elevating lever 95 for operating the elevating cylinder 100 to vertically elevate the front and rear wheels 1, 2. Incidentally, these levers 91 to 95 are highly likely to be used particularly frequently during traveling work.

The above levers 91 to 95 are also displaced to the left and right of the machine body 6 in accordance with the slide of the handle operating portion 9. Of these, the operation interlocking portion 96 of the elevating lever 95 connected to the hydraulic circuit is of the wire type. However, the operation interlocking part 96 is supported by a handle frame 920 extending from the machine body 6. Other lever 92 ~
Reference numeral 94 is connected to each part via a wire-type interlocking part so that a change in the slide position of the handle operating part 9 can be absorbed and each lever operation can be reliably transmitted.

In this way, the operating lever which constitutes the elevating lever 95 and the interlocking portion 96 thereof are connected between the two members which are displaced relative to each other, and therefore the handle is provided between the operating lever 95 and the interlocking portion 96. The position is freely changed according to the slide position of the operation unit 9.

That is, as clearly shown in FIGS. 8 and 9, the rotating shaft 95d, which is connected to the operating lever 95 and a plurality of arms 95a and 95b and is rotationally displaced in accordance with the lever position, moves in the sliding direction of the handle operating portion 9. A plurality of swing arms 95e and 95f are provided on the rotary shaft 95d so as to project between the swing arms 95e and 95f and the swing operation rod that constitutes the interlocking portion 96. , Removable pin 95g
I am trying to connect with. Thus, at the handle position shown in FIG. 6, the first swing arm 95e and the interlocking portion 96e.
And the second swing arm 95f and the interlocking portion 96 at the handle position shown in FIG. 7 or FIG. 9 so that the operation command can be transmitted to the hydraulic circuit side, respectively. ing.

It should be noted that during one traveling operation, that is, during one stroke operation from end to end of the ridge, the main drive gearshift lever 97, the slide operating lever 98 of the machine body 6, and the inter-stock adjustment lever 99, which are relatively infrequently used. Is directly supported not on the slidable handle operating section 9 but on the machine body 6 side.

By the way, with the above structure, the four wheels 1, 1, 2, 2 of the front and rear wheels are provided so that the tread can be changed, and are supported so as to be vertically movable between the lower use position and the upper storage position. I am doing it. Thus, in order to improve the maintenance such as tread change and the stopper function at the time of storage, the front and rear stands F and R, which are grounded when the wheels 1, 1, 2 are located at the upper storage position, are respectively provided. It is provided.

As shown in FIGS. 3 to 5, the front stand F has a substantially U-shaped stand main body F2 having a non-grounded portion F1 recessed in the central portion thereof, and a left-right crossing above the non-grounded portion F1. The first horizontal bar portion F3 and the second horizontal bar portion F that runs in parallel with the horizontal bar portion F3 and extends in the vicinity of the left and right rotation center portions F4 and F5.
6, and is supported in the front part of the frame 3 so as to be reversible over two positions, a ground contact position on the lower side and a standing position on the upper side. F7 and F8 are biasing springs that are interposed between the left and right rotation center portions F4 and F5 and the second horizontal bar portion F6 to hold the lower ground contact position and the upper standing position, respectively. F9 and F10 are fixed levers for switching between the grounding position and the standing position and fixing and holding the switching position,
Receiving holes F13 and F14 for receiving pins F11 and F12 protruding from the left and right of the main body F2 are provided. F15, F1
Reference numeral 6 denotes an urging spring that constantly urges the entire lever toward the main body F2, and includes pins F11 and F12 and receiving holes F13 and F14.
The engagement state with is kept good.

The first horizontal bar portion F3 is provided with a scale D1 indicating the slide position of the machine body 6 with respect to the frame 3, and the bracket 61 sliding with the machine body 6 side is composed of a vertical rod indicating the scale D1. Display D
2 are provided, and the scale D1 and the display D2 constitute a slide position detector D. In this way, when the front stand F is erected and the work is performed, the slide position of the machine body 6 can be confirmed from the side of the operator who operates the handle.

As shown in FIG. 6, the rear stand R is made up of a substantially U-shaped stand ear body R2 and is provided below the left and right handle frames 910 and 920 of the machine body 6 with U-shaped brackets R4 and R5. It is supported so that the position can be freely changed over between two positions, a grounding position directed downward and a retracted position directed obliquely upward. R7 and R8 are interposed between the left and right brackets R4 and R5 and the main body R2,
An urging spring that holds the lower ground contact position and the upper retracted position, respectively. In addition, the fixed levers R9 and R10, the pins R11 and R12, and the bias springs R15 and R16 have the same configurations as the above-described F9, F10, F11, F12, F15, and F16.

The front stand F also serves as a front bumper when standing up, and when the front part collides,
Damage to and damage to the flare 3 and airframe 6 are prevented, and in the event of damage due to a collision, only the stand can be replaced.

Further, the rear stand R has a main traveling gear shift lever 9 when the vehicle is retracted to the upper side, when the front is floated due to a sudden start or when a machine or the like is hit from the rear.
7. It functions as a guard to protect the slide operation lever 98, the stock adjustment lever 99, etc. from damage.

[Brief description of the drawings]

FIG. 1 is a side view of a transplanter according to the present invention.

FIG. 2 is a plan view of the transplanter.

FIG. 3 is a front view of the transplanter.

FIG. 4 is a front view of the front stand when standing up.

FIG. 5 is a schematic view of a main part of a stand part.

FIG. 6 is a rear view of the transplanter.

FIG. 7 is a rear view when the steering wheel is offset.

FIG. 8 is a side view of a main portion of a handle operating portion.

FIG. 9 is a rear view of the main part of the handle operating unit.

[Explanation of symbols]

 1 …… Front wheel 2 …… Rear wheel 3 …… Frame 4 …… Engine 5 …… Transplanting section 6 …… Aircraft 9 …… Handle operating section 95… Operating lever 96… Operation interlocking section F …… Front side stand R …… Rear stand D …… Slide position detector

Claims (2)

[Claims] 1. Wheels (1), (1), (2) and (2) are provided on the front, rear, left and right of the airframe (6), and these wheels (1)
(1) (2) (2) is vertically movably supported between a lower side use position and an upper side non-use position, and the body 6
An agricultural working machine characterized in that stands (F) (R) for grounding the wheels (1) (1) (2) (2) when the wheels (1) (1) (2) (2) are located in the upper non-use position are provided at front and rear positions of the vehicle. . 2. The body (6) comprises wheels (1) (1) (2).
The front stand (F) is slidably provided in the width direction with respect to the frame (3) supporting (2), and
A slide that supports the frame (3) so that it can stand upright in the front portion of the frame (3), and indicates between the front stand (F) and the machine body (6) the slide position of the machine body (6) with respect to the frame (3). The agricultural working machine according to claim 1, further comprising a position detector (D).