JPH1014333A - Machine body structure for rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject machine body structure capable of simplifying and lightening the structure of a main frame, raising supporting strength and improving handleability, by integrally extending longitudinal frame parts from one end of sheet metal press materials longitudinally into a wide longitudinal wall state. SOLUTION: A pair of a right and a left sheet metal press materials 12a and 12b are bonded to constitute main frames 12 long in the longitudinal direction in a cylindrical state. Longitudinal frame parts 12A are extended in a longitudinal wall state wide in the longitudinal direction from at least one of a pair of the right and the left sheet metal press materials 12a and 12b. The longitudinal parts 12A are integrally extended from one of the sheet metal press materials 12a and 12b and reinforcing materials 12c having U-shaped cross sections composed of sheet metal press materials are bonded to the rear side faces of the longitudinal frame parts 12A to form hollow strut parts 12B. The bottoms of the strut parts 12B are connected to main frames 12. Preferably, the main frames 12 are formed in a backwardly rising state in different levels in a side view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quadruple system in which a vertical frame portion is erected at a rear portion of a pair of left and right main frames arranged along the longitudinal direction of an airframe, and a seedling planting device is connected so as to be movable up and down. The present invention relates to a rice transplanter in which a front end of an upper link in a link mechanism is pivotally connected to an upper portion of the vertical frame portion.

[0002]

2. Description of the Related Art Conventionally, in a rice transplanter having the above structure, as disclosed in Japanese Patent Application Laid-Open No. 7-96840, for example, the main frame is formed of a straight square pipe material. At the rear, a square pipe material is welded, and a vertical frame with a wide front and back is erected in the shape of a scoop, and an operation step is arranged above the front half of this main frame, and It is common to attach an axle case that supports the wheels.

[0003]

According to the above-mentioned conventional airframe structure, since the vertical frame portion is erected by welding on the main frame made of a square pipe material, it is necessary to increase the connection strength between the two. It is necessary to add a reinforcing rib and a reinforcing member, so that the number of components constituting the frame is increased, the assembling is troublesome, and the weight of the entire frame is also large.

[0004] The installation height of the main frame is determined by the installation height of the axle case supporting the rear wheels.
Since the rear wheels, which are the main propulsion wheels, have a large diameter and a high axial center position, the entire linear main frame naturally has a higher height. As a result, the driving steps corresponding to the first half of the main frame become high, and it tends to be difficult to get on and off.

The present invention has been made in view of such circumstances, and has as its main object to simplify and reduce the weight of a main frame structure. Another object of the present invention is to provide a vehicle body structure that facilitates getting on and off a driving step.

[0006]

[Means for Solving the Problems]

 [Configuration, operation and effect of the invention according to claim 1]

(Structure) According to the first aspect of the present invention, a vertical frame portion is erected at a rear portion of a pair of left and right main frames disposed along the longitudinal direction of the machine body, and the seedling planting device is connected so as to be able to move up and down. In a rice transplanter in which a front end of an upper link in a quadruple link mechanism is pivotally connected to an upper portion of the vertical frame portion, a pair of left and right sheet metal press materials are joined to form the main frame into a long tubular shape in the front-rear direction. The vertical frame portion is integrally extended from at least one of the pair of left and right sheet metal press materials into a wide vertical wall shape in the front and rear direction.

(Operation) According to the above configuration, the sheet metal press material constituting the main frame and the vertical frame-shaped vertical frame portion are integrated, so that the vertical frame portion is staggered on the main frame by combining pipe materials. The number of parts is significantly reduced as compared with the structure to be provided. Since the main frame is formed in a pipe shape along the longitudinal direction, the main frame has strength equivalent to that of a conventional main frame made of pipe material.
In particular, when joining a pair of left and right sheet metal press materials, a configuration in which each sheet metal press material is joined via flange portions formed on the upper and lower edges thereof, the upper and lower flange portions function as vertical ribs, and Has high bending strength.

(Effect) According to the first aspect of the invention, it is possible to simplify the main frame structure and reduce the weight by reducing the number of parts while obtaining sufficient strength. [Structure, operation and effect of the invention according to claim 2]

(Structure) According to a second aspect of the present invention, in the first aspect of the present invention, the vertical frame portion is integrally extended only from one sheet metal press material, and a sheet metal press is provided on a rear side surface of the vertical frame portion. A hollow support portion is formed by joining U-shaped reinforcing members made of a material having a transverse cross section, and a lower end of the support portion is joined to the main frame.

(Operation) According to the above configuration, a hollow column having high strength is formed at the rear of the vertical frame in a state of being continuous with the main frame, and the strength of the entire vertical frame is increased.

(Effect) The invention according to claim 2 provides the above-described effect of the invention according to claim 1, and can increase the support strength of the quadruple link mechanism by increasing the strength of the entire vertical frame portion.

[Structure, operation and effect of the invention according to claim 3]

(Structure) According to a third aspect of the present invention, in the first or the second aspect of the present invention, the driving axle is disposed so as to correspond to the front half of the main frame, and the axle supports the rear wheel. The case is configured to be supported by the rear portion of the main frame, and the main frame is formed so as to be raised rearward in a side view so that the rear portion of the main frame is positioned higher than the front half of the main frame. .

(Operation) According to the above configuration, even if the rear portion of the main frame is set at a high position in order to arrange the axle case supporting the large-diameter rear wheel at a high position, the first half of the main frame is provided with an operation step. Can be lowered. In this case, assuming that the main frame of the pipe material has a similar structure, it is necessary to bend the main frame having high rigidity to form a stepped shape, or to divide the main frame into a plurality of parts and weld it to a stepped shape. However, according to the structure in which the left and right sheet metal press materials are joined, the main frame having the desired step shape can be obtained only by forming the sheet metal press material itself into a stepped shape in advance in the plane pressing step and joining them.

(Effect) The invention according to claim 3 provides the above effect of the invention according to claim 1 or 2, and
The stepped main frame can be manufactured easily and inexpensively, and the operating steps can be reduced to easily configure the body structure that is easy to get on and off.

[Structure, operation and effect of the invention according to claim 4]

(Structure) The invention according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the left and right vertical frame portions erected from the pair of left and right main frames are connected by a connecting member. In addition to being connected, the connecting member is configured to receive and support the driver's seat.

(Function) According to the above configuration, the connecting member for connecting the left and right vertical frame portions is a strength member for increasing the rigidity of the pair of left and right main frames in the horizontal direction, and also functions as a support member for the driver's seat. I do.

(Effect) The invention according to claim 4 provides the above-mentioned effect of the invention according to any one of claims 1 to 3, and simplifies and reduces the weight of the body frame structure by combining the members. Becomes effective.

[Structure, operation and effect of the invention according to claim 5]

(Structure) The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein an opening is formed in the vertical frame portion erected from the main frame, and the axle case is formed. And a side brake pedal provided at a front portion of the driving deck portion is interlockingly connected by a linear rod provided through the opening.

(Operation) Generally, the left and right side brakes provided on the axle case are distributed and arranged on the left and right outer sides of the main frame. It is installed side by side on the right outside. Therefore, the left side brake pedal and the left side brake are located on opposite sides of the main frame, and an interlocking member such as a rod for interlocking the two has to be intersected with the main frame. Absent. Therefore, in general, means for passing the interlocking member under the main frame so as to intersect is often used. However, the interlocking member disposed below the main frame is more likely to contact an obstacle on the ground. On the other hand, according to the configuration of the present invention, the rod that interlocks and connects the side brake pedal and the side brake located on opposite sides of the main frame,
It can be arranged above the main frame, that is, at a place where there is little risk of contact with obstacles on the ground.

(Effect) The invention according to claim 5 provides the above effect of the invention according to any one of claims 1 to 4, and damages the rod that interlocks the side brake pedal and the side brake. Can be placed without fear,
An unexpected damage accident can be avoided beforehand and it can be made to function well for a long time. [Structure, operation and effect of the invention according to claim 6]

(Structure) According to a sixth aspect of the present invention, in the fifth aspect of the invention, a hydraulic hose for a hydraulic cylinder for driving and raising and lowering the four-link mechanism is inserted through an opening formed in the vertical frame portion. There is a feature.

(Operation) According to the above configuration, the hydraulic hose to the hydraulic cylinder can be provided without bypassing the vertical frame portion.

(Effect) The invention according to claim 6 provides the above-mentioned effect of the invention according to claim 5, and shortens the hydraulic hose to the hydraulic cylinder to reduce pressure loss and piping cost. be able to.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. This riding type rice transplanter is a four-wheel drive riding traveling body 3 having a pair of left and right front wheels 1 and rear wheels 2.
At the rear, a four-row planting seedling planting device 5 is connected via a four-link mechanism 4 so as to be able to ascend and descend freely, and spare seedling rests 6 are provided on the front left and right of the riding traveling machine 3 respectively. It has a structure. Here, the quadruple link mechanism 4 includes a connection point between the front end of the upper link 4a and the body side,
The hydraulic cylinder 7 is constructed so as to extend over a connection point between the rear end of the lower link 4b and the lower end of the rear link 4c. The shortening drive of the hydraulic cylinder 7 raises and lowers the four-link mechanism 4. The four-link mechanism 4 is lowered by its own weight by the extension operation of the hydraulic cylinder 7. In the seedling planting apparatus 5, a seedling stand 8, on which seedlings are placed and reciprocated horizontally with a constant stroke, a four-row planting mechanism 9 for planting two strains by one rotation, and leveling of the planted rice field. The whole seedling planting apparatus 5 is connected to the lower part of the rear link 4c so as to be rotatable around the axis P in the front-rear direction.

The body frame 11 of the riding vehicle 1
As shown in FIGS. 11 and 13, a pair of left and right main frames 12 arranged long in front and rear are arranged parallel to each other, and a pair of left and right long outer frames arranged front and rear are arranged laterally outside in parallel in plan view. 13, a front horizontal frame 14 connecting the front of the main frame 12 and the front of the outer frame 13,
It comprises a rear horizontal frame 15 for connecting the rear part of the main frame 12 and the rear part of the outer frame 13 and a connecting member 16 for connecting the rear parts of the main frames 12, and the whole is configured in a rectangular lattice shape.

As shown in FIG. 14, each of the left and right main frames 12 is formed by joining a pair of left and right sheet metal press blanks 12a and 12b in a flange-like manner to form a long square pipe in the front and rear direction. Sheet metal press material 1 located in
A wide and substantially trapezoidal vertical frame portion 12A is extended and extended in a series from the front and back from 2a, and the left and right vertical frame portions 12A are connected by the connecting member 16. A reinforcing member 12c made of a sheet metal stamped material having a U-shaped cross section is welded to the outer side surface of the rear portion of the vertical frame portion 12A to form an angle along the rear side of the vertical frame portion 12A. A pipe-shaped support 12B is formed, and the support 12
The other sheet metal press material 1 in which the lower end of B is located outside the fuselage
2b is welded to the upper surface. The front ends of a pair of left and right upper links 4a of the quadruple link mechanism 4 and the base end of the hydraulic cylinder 7 are pivotally connected via a fulcrum shaft 17 to an upper portion of a column portion 12B of the vertical frame portion 12A. At the same time, the front ends of a pair of left and right lower links 4 b of the quadruple link mechanism 4 are pivotally connected to a fulcrum shaft 18 on the outer surface of each main frame 12.

Outer frame 1 constituting body frame 11
3 is a sheet metal press material having a vertical U-shaped cross section, the front horizontal frame 14 is a straight round pipe material, and the rear horizontal frame 15 is A bent round pipe material is used.

The main frame 12 in the form of a square pipe is formed in a stepped shape rising rearward in a side view, and an axle case 19 supporting the rear wheel 2 mounts a bracket 20 below a rear portion of the main frame 12. A resin body cover 21 entirely covering the body frame 12 from above is detachably mounted. This body cover 2
A driving deck 21a is formed in the front half of the vehicle 1 and a rear wheel fender 21b and a seat support 21 are formed in the rear half.
The driver's seat 24 is rotatably mounted around a fulcrum X on a support bracket 23 integrally formed with the support member 21c and bolted in an anti-vibration manner via an elastic bush 22 above the seat support portion 21c. A rubber (or spring) cushion material 25 for receiving and supporting the seat 24 is attached to the upper surface of the seat support 21c.

The body cover 21 provided on the body frame 12 is elastically mounted and supported via vibration isolating rubbers 26 provided on the front, rear, left and right sides of the outer frame 13.
The seat support portion 21c is elastically received and supported by a rear connecting member 16 that connects the upper portions of the left and right vertical frame portions 12A via an anti-vibration rubber 27. Also, the fuselage cover 2
The connecting pins 28a provided on the left and right of the rear of the
1 are engaged from above in locking metal fittings 29 disposed on the left and right of the rear portion of the vehicle 1 and are positioned in the front-rear direction.
a and connecting pins 2 provided on the front left and right of the body cover 21
8b, hooks 30a, 30 provided on the body frame 11
b, the body cover 21 can be elastically supported on the body frame 11, and the hook 30
By removing a and 30b, the entire body cover 21 can be removed together with the driver's seat 24.

The boarding steps 31 are respectively connected to the outer ends of the left and right outer frames 13 in a suspended manner, and the boarding steps 31 and the left and right main frames 1 are connected to each other.
2, reinforcement stays 32 are respectively installed to reinforce the boarding steps 31 themselves and to reinforce the entire body frame 11.

Main frame 12 in body frame 11
A transmission case 35 that supports the front wheel 1 is connected to the front end of the vehicle, and the transmission case 35 and the axle case 19 are connected by a reinforcing frame 37 made of a pipe material, thereby ensuring the strength of the entire body. An air-cooled engine 36 is mounted on the transmission case 35, and a front frame 38 formed in a U-shape in plan view so as to surround the transmission case 35 from the front is mounted on the front horizontal frame 14 of the body frame 11. Are connected to both ends. The front frame 38 is a sheet metal press structure having a U-shaped vertical section, and headlights 39 are mounted on the left and right sides of the front surface. Also, a horizontal rod portion 6 connecting the lower ends of the columns 6a in the left and right spare seedling rests 6 is provided.
b is connected to the lower part of the front surface of the transmission case 35, and a pair of left and right support members 40 is installed diagonally across the horizontal rod portion 6b and the front frame 38.
The receiving base 42 of the battery 41 is attached over the range. A guard member 43 located in front of the battery 41 is attached to the front of the front frame 38, and a hook 44 used for towing or rope hanging is attached to the horizontal rod portion 6b.
Is provided. Further, a muffler 45 having an exhaust port 45a directed laterally outward is provided at a lower front portion in the front frame 38.

As shown in FIG. 3, a steering gear case 50 is connected to an upper portion of the transmission case 35, and a pitman arm pivotally supported on a lower portion of the transmission case 35 by rotating a steering handle 51 attached to the steering gear case 50. The left and right front wheels 1 are steered by swinging operation of the left and right 52.

The handle post 5 is provided at the rear of the engine 36.
3 and the instrument panel 54 is provided
A fuel tank 55 is installed above the engine 36 so as to partially overlap the engine 36. Further, a bonnet 56 for covering the engine 36 is detachably mounted in front of the instrument panel 54. At the lower portion of the hood 56, a boarding deck portion 56a for performing a walking movement between the front of the fuselage and the driving unit is integrally provided in a projecting manner,
A decorative cover portion 56b that covers the front frame 38 is provided continuously around the periphery of the boarding deck portion 56a.

The engine 36 has an output shaft 36a mounted in a horizontal direction toward the left and right. One end of the output shaft 36a and the input shaft 35a of the transmission case 35 are provided with a tension clutch and two sets of belt transmissions having different transmission ratios. A so-called double-tension type sub-transmission 57 that performs high-low two-stage shifting by selectively setting the mechanism to a clutch engaged state.
Are interlocked and linked. On the right side of the engine 36, a hydraulic pump 58 connected to the other end of the output shaft 36a is provided.
Is installed.

The engine power input to the transmission case 35 via the sub-transmission 57 is appropriately shifted by a gear-type main transmission (not shown) that shifts forward two steps and reverse one step, and the left and right front wheels 1 are shifted. And transmitted to the rear axle case 19 via the transmission shaft 59. A part of the power input to the transmission case 35 and subjected to the main transmission is appropriately shifted by an inter-stock transmission (not shown) provided in the transmission case 35 and then transmitted to the transmission shaft 6.
0 to the seedling planting apparatus 5.

The power input to the axle case 19 is transmitted to the left and right rear wheels 2 via the left and right side clutches and brakes 61a and 61b, and operates both side clutches and brakes 61a and 61b. Lever 62
a, 62b are provided on the left and right upper surfaces of the axle case 19. On the other hand, the side clutch / brake 61a, 61
b, a pair of side brake pedals 63a, 63
b are arranged in parallel at the front of the right main frame 12, and these side brake pedals 63a, 63b and the levers 62a, 62b are respectively linear rods 64a.
The transmission to the rear wheel 2 is cut off and the braking is applied when the side brake pedals 63a and 63b are depressed.
Here, the right rod 64b is disposed outside the right main frame 12, but the left rod 64a passes above the front part of the right main frame 12 and the vertical frame 16 Opening 6 formed in
5 and is arranged to cross.

A control valve 66 for the hydraulic cylinder 7 and an electric control unit 67 are mounted on the outer surface of the right vertical frame portion 12A, and a hydraulic hose 68 derived from the control valve 66 is connected to the right vertical frame portion 12A. The control unit 67 and the regulator 69 attached to the inner surface of the left vertical frame portion 12A are wired and connected through the opening 65 of the right vertical frame portion 12A. ing.

On the outer side surface of the right vertical frame portion 12A, a control valve 66 is operated, and a planting operation lever 70 mechanically linked to a planting clutch (not shown) in the transmission case 35, A sensitivity adjusting lever 71 for performing sensitivity adjustment in the raising and lowering control of the seedling planting apparatus 5 and a lever guide 72 for these are provided. When the planting operation lever 70 is operated to the foremost “planting position (p)”, the planting clutch is activated. At the same time, the seedling planting apparatus 5 is controlled to move up and down, and at the "down position (d)" one stage behind, the seedling planting apparatus 5 is controlled to move up and down while the planting clutch is disengaged, and the "neutral position (n)"", The raising and lowering of the seedling planting apparatus 5 is stopped, and the seedling planting apparatus 5 is forcibly raised at the last" up position (u) ". Further, the sensitivity adjusting lever 71 determines the mud hardness of the field, and adjusts the sensitivity of the elevation control to the more sensitive side as it is softer. Further, the lever guide 72 is provided facing an opening 73 formed in the body cover 21 so that the body cover 21 can be removed while maintaining the lever guide 72 during maintenance of the body.
Here, the lever guide 72 has its lever guide surface provided so as to be inclined downward and outward, and while increasing the width of the lever guide surface in plan view, increasing the substantial width of the lever guide surface. I'm using

[Other Embodiments] In the above embodiment, the vertical frame portion 12A of the main frame 12 is integrally extended only from one sheet metal press material 12a, and a reinforcing member 12c is connected to the side surface thereof. However, the pair of left and right sheet metal press blanks 12a and 12b may be extended together to form the vertical frame portion 12A. In this case, the reinforcing member 12c may be omitted.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a plan view of the body frame structure.

FIG. 3 is a side view of a front part of the aircraft.

FIG. 4 is a side view of the rear part of the fuselage.

FIG. 5 is a front view of the front part of the aircraft.

FIG. 6 is a vertical cross-sectional front view of a front and rear intermediate portion of the aircraft.

FIG. 7 is a partially cutaway perspective view of an airframe cover.

FIG. 8 is a perspective view of a front part of the fuselage.

FIG. 9 is a cross-sectional view showing a structure for mounting the seat mounting support bracket to the body cover.

FIG. 10 is a longitudinal sectional side view showing an attachment structure of the body cover to the body frame.

FIG. 11 is a plan view of the body frame structure.

FIG. 12 is a perspective view around the front frame.

FIG. 13 is a perspective view of a body frame.

FIG. 14 is an exploded perspective view showing the configuration of one main frame.

FIG. 15 is a side view of the main frame.

16 is a sectional view taken along line aa in FIG.

17 is a sectional view taken along line bb in FIG.

18 is a sectional view taken along line cc in FIG.

[Explanation of symbols]

 Reference Signs List 2 rear wheel 4 quadruple link mechanism 4a upper link 12 main frame 12A vertical frame part 12B support part 12a sheet metal press material 12b sheet metal press material 12c reinforcing material 16 connecting member 24 driver seat 61a side brake 63a side brake pedal 64a rod 65 opening 68 Hydraulic hose

Claims (6)

[Claims] An upper link in a quadruple link mechanism for vertically setting a vertical frame portion at a rear portion of a pair of left and right main frames arranged along a longitudinal direction of a body and connecting a seedling planting device so as to be able to move up and down. In a rice transplanter configured to pivotally connect a front end to an upper portion of the vertical frame portion, a pair of left and right sheet metal press materials are joined to form the main frame into a long tubular shape in the front-rear direction. The body structure of a rice transplanter, wherein the vertical frame portion is integrally extended from at least one of the materials into a wide vertical wall in the front and rear directions. 2. The vertical frame portion is integrally extended only from one sheet metal pressing material, and a U-shaped reinforcing member made of a sheet metal pressing material is joined to a rear side surface of the vertical frame portion. A body structure of a rice transplanter, wherein a hollow column is formed, and a lower end of the column is joined to the main frame. 3. A driving deck portion is provided corresponding to a front half of the main frame, and an axle case supporting a rear wheel is supported at a rear portion of the main frame. The body structure of a rice transplanter according to claim 1 or 2, wherein the main frame is formed so as to be higher than the front half part so as to be stepped up rearward in a side view. 4. The vehicle according to claim 1, wherein the left and right vertical frame portions erected from the pair of left and right main frames are connected by a connecting member, and the connecting member receives and supports the driver's seat. Item 5. The body structure of a rice transplanter according to any one of Items 1 to 3. 5. An opening is formed in the vertical frame portion erected from the main frame, and a side brake provided on the axle case and a side brake pedal provided on a front portion of a driving deck portion are connected to the opening. 5. An interlocking connection by a linear rod penetrating and deployed.
The fuselage structure of the rice transplanter according to any one of the above. 6. The body structure of a rice transplanter according to claim 5, wherein a hydraulic hose to a hydraulic cylinder that drives and raises and lowers the four-link mechanism is inserted through an opening formed in the vertical frame portion.