WO2000035264A1

WO2000035264A1 - Manned rice transplanter

Info

Publication number: WO2000035264A1
Application number: PCT/JP1998/005636
Authority: WO
Inventors: Makoto Inoue; Tsunatake Yamashita
Original assignee: Yanmar Agricultural Equipment Co., Ltd.
Priority date: 1998-12-11
Filing date: 1998-12-11
Publication date: 2000-06-22
Also published as: CN1294798C; KR100448530B1; CN1327363A; KR20010108004A

Abstract

A manned rice transplanter comprising a body having front and rear wheels, a power unit and a transplanting unit each provided to the frame, and a body cover having a main step and an auxiliary step integrally provided to the frame. A body frame having a convex and substantially triangular shape, when viewed from a side, for supporting the load on the driver's seat at a point near the vertex is provided to the body frame.

Description

Specification

Riding rice transplanter

Technical field

The present invention relates to a body cover structure and a body frame structure of a riding rice transplanter. Background art

Conventionally, walking-type rice transplanters have been used in small-scale fields such as mountainous areas, but recently, walking-type rice transplanters have been used due to agriculture conditions such as aging of workers and reduction of workers. Riding type rice transplanters are demanded because the load on the machine is heavy for the workers and the working time is long. In such a riding type rice transplanter, auxiliary steps for getting on and off are provided separately from the steps on the body cover.

Also, in such a riding type rice transplanter, the body frame is often formed in a substantially triangular shape when viewed from the side, but the load on the driver's seat is located in the middle of the hypotenuse on the front side in consideration of the entire length of the aircraft. Not supported by the steps provided

However, the above-mentioned auxiliary steps for getting on and off are configured separately from the body cover, such as by being fixed to the body frame, so that the number of parts is large and it is preferable in terms of cost. It is not possible to say the same. ₍ Also, if the load on the driver's seat is supported by a stay or the like provided in the middle of the hypotenuse of the body frame that is formed in a substantially triangular shape in side view as described above, High rigidity members had to be used, resulting in high costs.

The present invention has been made in view of the above circumstances, and has as its object to provide a low-cost riding rice transplanter capable of reducing the number of parts. You. Another object of the present invention is to provide a low-cost riding rice transplanter capable of supporting a driver's seat load without using a highly rigid member for a vehicle body frame. Disclosure of the invention

First, a first aspect of the present invention relates to an airframe including a front wheel and a rear wheel, a vehicle body cover covering an upper part, a main step installed on the vehicle body cover, and an auxiliary step for getting on and off the main step. In the riding rice transplanter in which the planting portion is disposed, the vehicle body cover is formed integrally with the main step and the auxiliary step.

In the first aspect of the invention, since the body cover having the main step and the auxiliary step is integrally formed, manufacturing and assembly are facilitated, the number of parts is reduced, and cost is reduced.

Further, in a second aspect based on the first aspect, the auxiliary step is located between the front wheel and the rear wheel, and the main step and the auxiliary step are arranged below the main body from the main step. O, and are connected to each other via a connecting portion composed of a wall surface extending toward the front wheel and side surfaces formed along the front wheel and the rear wheel in a side view, respectively.

In the second aspect, since the connecting portion is provided between the main step and the auxiliary step, the strength of the auxiliary step can be improved. In addition, since the auxiliary step is located between the front and rear wheels, it can be used for both front and rear wheels. However, there is no danger of getting caught in the front or rear wheels.

In a third aspect based on the second aspect, the connecting portion is provided below the body. According to the third aspect of the present invention, an opening is provided on a connecting portion of the wall surface extending downward from the airframe. Therefore, when the operator puts his / her foot on the assisting step, the tip of the foot can be inserted into the opening of the assisting step, so that the operator can safely get on and off even in the assisting step with a small depth. Furthermore, since the width in the lateral direction of the aircraft can be made as small as possible, compactness in the lateral direction of the aircraft can be achieved.

A fourth invention is characterized in that, in the first to third inventions, an edge portion of the main step with a wall surface extending downwardly of the body is formed in a concave shape toward the inside of the body in plan view. And

In a fifth aspect based on the first to fourth aspects, the auxiliary step is located outside the fuselage in plan view than the edge of the main step and a wall surface extending downward from the main fuselage. Features.

In the fourth and fifth aspects of the invention, the edge of the main step and the wall surface extending downward is formed in a concave shape toward the inside of the fuselage in a plan view, and the auxiliary step is formed more than the edge. Since it is located outside the fuselage in plan view, it is easy to confirm the position of the auxiliary steps.

In a sixth aspect based on the second to fifth aspects, in the second to fifth aspects, the opening portion of the connecting portion is located outside the fuselage in plan view than an edge of the main step and a wall surface extending downward from the main step. It is characterized by being located.

In the sixth aspect of the invention, since the opening of the connecting portion is located outside the edge of the main step and the wall surface extending downward from the main body in plan view, the mud on the main step is formed. Does not fall on the auxiliary steps, falls onto the ground from the opening, and when the operator puts his feet on the auxiliary steps, the feet are securely supported on the entire auxiliary steps. You can get on and off safely.

According to a seventh aspect of the present invention, in the first to sixth aspects, a support member for supporting the vehicle body cover is provided near the auxiliary step. In such a seventh aspect, a vehicle body is provided near the auxiliary step. With the support member that supports the cover, the load applied to the main step and the auxiliary step in the vertical direction can be reliably supported, and the bending of the main step and the auxiliary step when the operator gets on and off the aircraft. It is possible to effectively reduce the slip and prevent the foot from slipping due to bending.

An eighth invention is characterized in that, in the seventh invention, the support member is attached to a front axle case that supports the front wheel.

In the eighth aspect, since the support member for supporting the vehicle body cover is attached to the front axle case, it is possible to support a vertically upward load applied from the front wheels to the front axle case during work. The total number of parts can be reduced, which leads to weight reduction and cost reduction.

A ninth invention is directed to a passenger rice transplanter in which a power unit and a planting unit are disposed on an airframe having front and rear wheels and a driver's seat in an upper part, wherein the airframe applies a load to the driver's seat. It is characterized by having a substantially triangular body frame that is convex upward in side view and supported near one vertex.

In the ninth aspect, the load on the driver's seat is received near one vertex of the vehicle frame having a substantially triangular shape in a side view. The weight of the frame can be reduced, and the number of parts can be reduced to reduce the cost. A transmission case that includes a drive shaft, a drive shaft of the rear wheel, and a power transmission mechanism that transmits power from the power unit to the drive shafts, and forms a bottom side of the substantially triangular body frame; According to the tenth aspect of the present invention, the base of the substantially triangular vehicle body frame is transmitted to the drive shaft of the front wheel, the drive shaft of the rear wheel, and the power. Since it is connected by a mission case equipped with a power transmission mechanism, the load applied to the driver's seat can be supported by the mission case. A rigid and compact rice transplanter can be obtained. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic side view of a riding rice transplanter according to the present invention,

FIG. 2 is a schematic plan view of a traveling vehicle of the riding rice transplanter according to the present invention. FIG. 3 is a schematic plan view of a body frame of the traveling vehicle of the riding rice transplanter according to the present invention.

FIG. 4 is a schematic side view of a body frame of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 5 is a schematic plan view of a rear cover of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 6 is a schematic plan view of a front cover of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 7 is a partially enlarged plan view of a body frame of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 8 is a partially enlarged side view of a front cover of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 9 is a schematic plan view showing another example of the fixed portion of the traveling vehicle of the riding rice transplanter according to the present invention, FIG. 10 is a schematic sectional view of a non-slip member of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 11 is a schematic plan view of a non-slip member of a traveling vehicle of the riding rice transplanter according to the present invention,

Fig. 12 is a schematic side view of the traveling vehicle of the riding rice transplanter according to the present invention, and Fig. 13 is the fitting of the rear cover of the traveling vehicle of the riding rice transplanter according to the present invention to the mission case. Schematic side view of the part,

FIG. 14 is a schematic side view showing a mechanism in a mission case of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 15 is a schematic plan view showing a mechanism at a rear portion in the mission case of the traveling vehicle of the riding rice transplanter according to the present invention;

FIG. 16 is a schematic plan view showing all the mechanisms in a mission case of a traveling vehicle of the riding rice transplanter according to the present invention,

FIG. 17 is a schematic side view showing a mechanism for transmitting power from the engine of the traveling vehicle of the riding rice transplanter according to the present invention to the mission case;

FIG. 18 is a schematic plan view showing a mechanism for transmitting power from an engine of the traveling vehicle of the riding rice transplanter according to the present invention to the mission case. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.

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

The riding rice transplanter A is composed of a traveling vehicle 1 and a planting section 9 connected to the rear part. A front wheel 2 and a rear wheel 3 are suspended at a front portion and a rear portion of the traveling vehicle 1, respectively, and an engine 5 as a power unit is mounted at a front portion of the vehicle body frame 4. And the body frame behind the engine 5 A transmission case 6, which is formed long in the front and rear direction, is disposed substantially at the center of the left and right of the transmission case 4. The front wheel 2 is supported at the front of the transmission case 6, and the rear wheel 3 is supported at the rear. On both sides of the bonnet 22 that covers the engine 5, spare seedling mounting stands 90 are arranged, and the mission case 6 and the like are covered by the vehicle body 20 on which the operator 1 rides. A driver's seat 7 is provided in the upper rear part of the vehicle body cover 20, and a steering handle 8 is provided behind the hood 22 in front of the vehicle body cover 20.

The planting section 9 is composed of a seedling platform 91 with four-row planting, a plurality of planting claws 93, etc. The planting transmission frame 92 is supported by the planting transmission frame 92 so as to be able to reciprocate left and right through a drain 96, and the planting claw 93, which cranks by a crank mechanism, is provided at the rear of the planting transmission frame 92. are doing.

Therefore, such a rice transplanter A moves while driving the front wheel 2 and the rear wheel 3 and moves the seedling mounting table 91 which can reciprocate to the left and right. 3 while the seedlings are being planted continuously

Λ. O

A hitch 94 is provided at the front of the planting transmission frame 92 via a mouth ring fulcrum shaft 176. The hitch 94 has a top link 11 pivotally supported on the upper left and right sides of the hitch 94, and a lower link 1 pivotally supported on the lower left and right sides of the hitch 94. 2 is connected to the rear of the traveling vehicle 1 via a lifting link mechanism 10 including

The base of the lift arm 13 is fixed to the inner surface of the front end of the lower link 1 2, and the lift arm 13 is arranged in an upward direction perpendicular to the direction in which the lower link 12 is provided. It is protruded. An elevating cylinder 15 that drives the elevating link mechanism 10 to elevate and lower is connected to a lift arm 13 that is connected to the lower link 12. In addition, a reinforcing link 14 is connected between the upper end of the lift arm 13 and the rear end of the lower link 12 to increase the rigidity of the lower link 12. .

Further, the front ends of the top link 11 and the lower link 12 are pivotally supported via pivot pins laterally provided between rear connecting frames 43, 44 described later. These rear connecting frames 43, 44 are also used as supporting parts of the lifting link mechanism 10, so that the planting part 9 can be moved up and down stably, the number of parts is reduced, and the configuration is simplified. ing.

In addition, the main gear cover 75, the seedling connecting lever 76, the planting elevating lever 77, the main clutch pedal 74, the brake pedal Ί3, etc. Are arranged. Below the planting section 9, a center float 97 and side floats 98, 99 for leveling, which hold the planting section 9 at a certain height, are provided. The center float 97 is located on the left and right center lines of the traveling vehicle 1. Side floats 98, 99 are provided at the left and right symmetrical positions of the center float 97 to maintain a good balance of the planting section 9 on the left and right, and to maintain the planting posture. FIG. 2 is a schematic plan view of a traveling vehicle of the riding rice transplanter according to the present invention, which is stably and accurately planted. FIG. 3 is a schematic plan view of the vehicle body frame. Figure 4 is a schematic side view.

The body frame 4 is formed of a pipe body, and is formed with a front frame 40 that is bent toward the rear of the fuselage on both sides to form an expanded U-shape, and a mission case 6. In such a state, the rear part of the vicinity of the front end of the mission case 6 is parallel to the mission case 6, and the front part of the mission case 6 near the front end is expanded in a substantially V-shape. It is composed of a pair of left and right side frames 41, 42 formed. Has been established. The V-shaped front ends of the side frames 41 and 42 are connected to the open-side rear of the front frame 40, and further, as shown in FIG. , 42 are bent upwards.

At both ends of the front frame 40, a holding portion 28 into which the column 90a of the spare seedling mounting stand 90 is fitted is provided via a stay 29, and the spare seedling mounting stand 9 is provided. For 0, the direction can be changed by 180 degrees by removing the support 90a from the holding portion 28. In addition, the front sides of the side frames 41 and 42 are expanded in a V-shape, so that a wide engine space can be secured, and the mission cases 6 of the side frames 41 and 42 can be secured. Behind the vicinity of the front end is parallel to the mission case 6, so that the installation space for the rear wheel 3 and various operation levers can be secured, and the method of fixing and connecting these can be simplified. It has become.

As shown in FIG. 4, a flat support member 50 extends from the center of the front frame 40 to the rear and downward, and extends from the center. It is placed on the support member 50. The front portion of the support member 50 is formed so as to be curved upward toward the front frame 40, and an elongated opening 50a is formed in the curved portion. The rear end of the engine support member 50 is supported by a connecting frame 45 connecting the side frames 41 and 42, and a slot-like opening 50b is also provided near this connecting portion. Are drilled.

The openings 50a and 50b formed in the support member 50 are used to reduce the weight of the entire body and to promote the heat radiation effect of the engine 5, and also provide the engine drain.ことが It can be used as a through hole and for maintenance. Also, this support Since the holding member 50 has a flat plate shape, it can be used as a protective cover under the engine 5 and cost reduction can be achieved as compared with a case where a separate protective cover is provided. And, above all, since the mounting height position of the engine 5 can be set at a lower position, the center of gravity of the entire aircraft can be lowered, and a rice transplanter with an excellent fall angle can be realized.

The upper part of the engine 5 is covered by a bonnet 22. The lower part of the engine 5 projects below the body frame 4 as shown in FIG. For this reason, in the present embodiment, an air-cooled engine is used as the engine 5, but the cooling air inlet 5a near the recoil star is exposed from below the vehicle body frame 4, and The exhaust port of the muffler 5b, which is relatively hot, is located on the opposite side of the intake port 5a, facing the outside of the aircraft, so there is no intake resistance for cooling air and the number of intake ports is reduced. The temperature of the cooling air can be reduced. Further, since heat can also be radiated from the portion where the engine 5 is exposed, the heat balance of the engine 5 is improved, and the output does not decrease. Therefore, a rice transplanter with excellent heat balance can be realized.

In addition, the bonnet 22 need only be provided with a minimum number of slits or windows, so that the bonnet 22 can be provided at a position where the operator is not exposed to hot air. Further, since the height of the bonnet 22 itself is also reduced, the visibility of the operator is improved, and workability can be improved.

FIG. 5 is a schematic plan view of the rear cover of the traveling vehicle of the riding rice transplanter according to the present invention, and FIG. 6 is a schematic plan view of the front cover.

A vehicle body cover 20 is provided on the vehicle body frame 4. The body cover 20 has a front cover 21 in which the bonnet 22 and the sub-step 23 are integrally hollow-molded by a single-piece molding of synthetic resin. Rear cover in which the installation part 3 1 of the driver's seat 7 on which the vehicle rides, the main step 3 2, and the auxiliary step 33 when getting on and off the operator overnight are formed by integral molding using synthetic resin. 30, which facilitates manufacturing and assembly, and reduces costs by reducing the number of parts.

The rear cover 30 is fixed to the vehicle body frame 4 by a fixing means such as a bolt, and the rear side is formed so as to bulge upward from the main step 32 toward the rear upper side, so that the installation portion 31 of the driver's seat 7 is formed. Has formed.

As shown in Figs. 1, 2 and 5, the auxiliary step 33 integrally formed with the rear cover 30 extends downward from both sides of the main step 32 to the outside of the fuselage. It is connected to the front wheel 2 via a connecting part consisting of a slightly inclined wall 33a and side surfaces 33b, 33c shaped along the front wheel 2 and the rear wheel 3 respectively when viewed from the side. It is located between the rear wheel 3.

Since the side surfaces 33b and 33c of the connecting portion are formed along the front wheel 2 and the rear wheel 3, respectively, the cover of the front wheel 2 and the rear wheel 3 can be used, and the operator can assist. From step 33, the foot does not interfere with the front wheel 2 or the rear wheel 3 even if the foot is slid in the longitudinal direction of the aircraft. In addition, since the auxiliary step 33 is supported from both sides in the front-rear direction, the strength of the auxiliary step 33 can be maintained effectively.

A substantially trapezoidal opening 33e having a side 33d of approximately the same length as the length of the auxiliary step 33 in the front-rear direction is formed in the connecting wall 33a. When the operator places the foot on the auxiliary step 33, the tip of the foot can be inserted into the opening 33e. Therefore, even for the auxiliary step 3 with a small depth, It is possible to get on and off safely at Pele overnight, and to reduce the lateral width of the aircraft in auxiliary steps 33 as much as possible, so that the aircraft can be made compact in the left and right lateral directions.

Also, as shown in the plan view of FIGS. 2 and 5, the edge of the main step 32 on the inside of the fuselage with the wall 3 3 a on which the auxiliary steps 33 are continuously provided on both sides is shown. When the operator gets off the fuselage, the position of the auxiliary step 33 is confirmed by the concave portion 32a and the inclined wall 33a. ing. Therefore, when the operator puts his / her foot on the assisting step 33, the foot can be securely supported on the entire surface of the assisting step 33, and the passenger can get on and off safely. Furthermore, since the wall surface 33a is continuously provided with a slight inclination downward from the recess 32a of the main step 32 toward the outside of the fuselage, the opening 33e can be seen in a plan view. That is, the side 33 d of the outer end of the opening 33 e is located outside the recess 32 a of the main step 32 in plan view. For this reason, the mud on the main step 32 does not fall on the auxiliary step 33, but falls to the ground from the opening 33e.

In addition, near the front side of the auxiliary step 33 and near the lower surface of the main step 32, the upper surface of a prismatic stay 36 having a substantially U-shaped cross section is attached by fixing means such as bolts. The lower surface of the stay 36 is attached to a front axle case 37 shown in FIG. 12 described later. The front axle case 37 is fixed to a front portion of the vehicle body frame 4 via a connecting member 37a.

The side surface 3 3b on the front wheel 2 side in the connection portion of the auxiliary step 33 is located near the upper surface of the front axle case 37, and the front axle case 37 and the main step 32 are connected to each other. 3 by 6 In this way, the load applied vertically downward to the main step 32 and the auxiliary step 33 is supported.

In other words, the step 36 effectively reduces the bending of the step due to the vertical downward load applied to the main step 32 and the assisting step 33 when the operator gets on and off the airframe 1. This prevents the operator's feet from slipping due to bending. At the same time, the vertical upward load coming from the front wheel 2 applied to the front axle case 37 during work is supported by the stay 36, and the step reinforcement and the front stay are supported by each other. By combining the toxle case with the step 36, the total number of parts is reduced to reduce the weight and cost.

In addition, the left and right pedal openings 34a and 34b at the front of the main step 32 are not provided with an edge 32b. As a result, mud and water accumulated in the lower portion of the main step 32 can be drained from the openings 34a and 34b, so that slippage and erroneous operation when the pedal is depressed can be prevented. Is prevented and safety is increased.

FIG. 10 is a schematic cross-sectional view of a non-slip member of the traveling vehicle of the riding rice transplanter according to the present invention, and FIG. 11 is a schematic plan view thereof.

As shown in these figures, the upper surface of the main step 32 and the sub-step 23 of the front cover 21 has a non-slip member 35 with a concave convex center. Many of them are integrated with the main step 32 and sub-step 23, and are protruded in a lattice shape. Therefore, it is not necessary to separately use a step cushion or the like as in the related art, so that the number of parts can be reduced, and costs and production processes can be reduced. In addition, by making the anti-slip member 35 into such a shape, a high anti-slip effect is enhanced, and when getting on and off in front of the fuselage. In addition, safety can be ensured when transferring the seedling pine from the seedling mounting platform 90 to the seedling mounting platform 91. In particular, since the non-slip members 35 are arranged in a grid, the drainage and mud discharge effects are high, and mud clogging between the non-slip members 35 can be prevented.

On the other hand, as shown in FIG. 6, the front cover 21 has a central bonnet 22 on which the engine 5 is mounted and spare seedling mounting stands provided on both sides of the bonnet 22. And sub-steps 23 for passage to 90. The upper portion of the bonnet 22 is open so that the fuel tanks 13 and 36 can be disposed above the engine 5.

The front cover 21 can be separated from the rear cover 30 at the pedal portion, and is configured to be detachable by moving a slide from the front on the body frame 4 in the front-rear horizontal direction. Therefore, the body frame 4 functions as a guide member for attaching and detaching the front cover 21, and the lower surface of the front cover 21 and the upper surface of the body frame 4 are substantially at the same height. .

As described above, the front cover 21 is separated from the rear cover 30 at the pedal portion, and the front cover 21 is slid from the front to be detached, so that the pedal openings 34 a, 34 are provided. b should be at least as long as the space for the columns 73a and 74a of the brake pedal and the main clutch pedal is secured, and the size of the openings 34a and 34b is reduced. Therefore, the degree of freedom of the design can be improved in other steps and the like.

In addition, the front cover 21 can be attached and detached irrespective of the parts located above the step, such as the steering of the steering handle 8, so that the maintainability of the engine 5 and the like is improved. Such operations can be easily performed. The upper surface of the body frame 4 is the front cover 2 Since it is the first guide, there is no need to provide a separate guide member, and the cost can be reduced by reducing the number of parts.

FIG. 7 is a partially enlarged plan view of the body frame of the traveling vehicle of the riding rice transplanter according to the present invention, and FIG. 8 is a partially enlarged side view of the front cover, as shown in these figures. The front cover 21 is fixed to the vehicle body frame 4 by a fastener 25 with a grip such as a knob screw, so that the fastener 25 can be easily attached and detached. The cost is reduced due to the structure.

The fastener 25 with the gripping portion passes from below the vehicle body frame 4 through a through-hole 24 a formed in the fixing portion 24 provided in the vehicle body frame 4, and passes through the sub-step 2 of the front cover 21. It is screwed to the lower surface on the three sides. With such a structure, the upper surface of the sub-step 23 is not affected by the design of the fastener 25 with the gripping portion, and the operator is required to enter and exit the vehicle and to supply seedling mats. There is no danger of catching a foot or the like when passing through the sub-step 23 next to the bonnet 22.

A fixing mechanism is provided on the fixing portion 24 of the vehicle body frame 4 so that the vehicle body frame 4 can be mounted even if there is a slight error in the mounting position between the front cover 21 and the vehicle body frame 4. This accommodation mechanism is formed by, for example, forming a through hole 24 a formed in the fixing portion 24 in an elongated shape. Therefore, even if there is a slight variation in the dimensions of these parts, the adjustment can be performed by the accommodating mechanism, and the front force bar 21 can be securely attached, and The management and quality of the cover 21 can be improved. FIG. 9 is a schematic plan view showing another example of the fixed portion of the traveling vehicle of the riding rice transplanter according to the present invention. The shape of the through hole 24a is the front and rear as shown in Fig. 3 and Fig. 7. In addition to those that are long in the horizontal direction, those that are long in the fuselage width direction (left and right directions) as shown in Fig. 9 or those combined in a cross shape that is long in the front and rear and in the width direction of the fuselage may be used. is there.

Also, in order to prevent the fastener 25 with the gripping part from loosening due to vibration during the work, protrude the restricting tool 26 such as a flat head pin from a horizontal direction substantially perpendicular to the axis of the fastener 25. Thus, the fastener 25 is engaged with the concave holding portion of the fastener 25 with the gripping portion to restrict the rotation of the fastener 25. At this time, since the restricting tool 26 is inserted into the hole of the stay 29 provided in the vehicle body frame 4 and is slidable in the horizontal direction, a detachable positioning tool 2 such as a snap pin is used. 7, the sliding is suppressed. Specifically, for example, a plurality of holes 26a are provided at predetermined intervals in the regulating tool 26, and the positioning tools 27 are inserted into holes located on both sides of the stay 29, and the regulating tool 26 slides. According to _c such a configuration that is not to dynamic, or restricting mechanism 2 6 bends, the engagement between the fastener 2 5 unless die or exit is not released, the safety is ensured. In addition, since the positioning is fixed by the two detachable positioning tools 27, only the positioning tool on the fastening tool 25 side is removed, and the restricting tool 26 can be slid easily. The engagement of the restricting tool 26 with respect to 5 can be easily released. At this time, since the other positioning tool is still inserted into the control tool 26, it is unlikely that the control tool 26 is lost when the front cover 21 is removed. Absent. Also, even if a force is applied to the restrictor 26 in the direction in which the fastener 25 rotates, the force is not directly applied to the positioning tool 27, so that the positioning tool 27 may not come off during the work. It is safe.

In addition, the front cover 21 can be bent near the pedal, for example. And the bonnet 22 may be configured to be able to rotate upward. In this case, when the engine 5 or the like is maintained, the front force bar 21 need not be removed. Work can be done easily.

Almost the entire mission case 6 is located below the rear cover 30, in which case the front upper surface of the mission case 6 is in contact with the front lower surface of the main step 32. The main case 32, which is in contact with and has a large vertical downward force, is suitably supported by the mission case 6. Therefore, the strength of the main step 32 can be improved, and there is no need to separately provide a step support member on the body frame 4, so that the number of parts can be reduced and cost can be reduced. By adopting the following configuration in the contact portion, the positioning accuracy of the rear cover 30 with respect to the mission case 6 can be improved.

FIG. 12 is a schematic side view of a traveling vehicle of the riding rice transplanter according to the present invention, and FIG. 13 is a schematic side view of a fitting portion between the rear cover and the mission case.

As shown in these figures, a convex portion 6a is provided substantially at the center of the upper front surface of the mission case 6, and a concave portion 3 2 is provided substantially at the center of the lower front surface of the main step 32. By providing c and fitting them together, they are positioned and brought into contact. It is desirable that the convex portion 6a and the concave portion 32c are formed in a tapered shape by inclining the side surface in a side view like a shape of a truncated cone. As a result, the inclined side surfaces serve as guides, so that the positioning accuracy of the rear cover 30 can be further improved, and assemblability can be improved. It should be noted that a concave portion should be provided in the case 6 and a convex portion should be provided in the rear cover 30. It may be.

The mission case 6 is formed so that the rear part is separated from the lower surface of the main step 32, that is, as shown in FIG. 4 and FIG. The lower part of the rear end of the body frame 4 extends from the lower part of the body frame 4 in the front-rear direction to the lower part of the rear part of the body frame 4 in the front-rear direction. It is located in. Therefore, the PT0 transmission shaft 158 to the planting section 9 and the lifting cylinder 15 for raising and lowering the planting section 9 and the relationship of various operation levers can be arranged above the rear of the mission case 6. Space can be secured, the overall length of the fuselage can be shortened, and a simple and lean arrangement can be adopted, improving design flexibility.

The mission case 6 is fixed to the vehicle body frame 4 in the vicinity of the frontmost portion, near the rearmost portion, and in the vicinity of the middle portion, but in the vicinity of the frontmost portion of the mission case 6, the engine 5 is mounted. The supporting member 50 is fixed via a mounting member 51 extending obliquely inward and rearward downward from the supporting member 50. Therefore, the load of the heavy engine 5 is also supported by the mission case 6, and the load is applied in the direction of compressing the mission case 6. Accordingly, the vibration of the engine 5 can be suppressed by the rigid mission case 6, and the body frame 4 itself can be reduced in weight, thereby making it more compact.

Further, the side frames 41, 42 constituting the vehicle body frame 4 are formed so as to bend upward from the substantially central portions 4la, 42a in the front-rear direction, and the central portion at which the bending starts. A center frame 46 is erected in the machine width direction near 41 a and 42 a. And this The middle part 6 b of the mission case 6 is connected to a mounting member 47 provided substantially at the center of the center frame 46 in the body width direction. The midway 6b is located immediately above the PTO shaft 65 projecting rearward.

The upper end portions 43 of the rear connecting frames 43, 44 connected via a mounting plate 39 to a rear axle case 38 integrally provided at the rear of the mission case 6. a, 44a and the rear ends 41b, 42b of the side frames 41, 42 are integrally connected, and the side frames 41, 42 and the rear connecting frame 43, 43 are connected integrally. 4 4 and the mission case 6 form a substantially triangular frame in side view. A portion where the rear ends 41b, 42b of the side frames 41, 42 and the upper ends 43a, 44a of the rear connecting frames 43, 44 are connected, that is, a substantially triangular shape. A rear frame 48 is erected in the width direction of the fuselage at the uppermost vertex of the shape, and the rear lower surface of the driver seat section 31 of the rear cover 30 is placed on the rear frame 48. While being fixed, the rear support member 72 of the driver's seat 7 is connected via a connecting member.

In addition, a pipe stay or the like, which is erected substantially in the middle between the central portions 41a, 42a of the side frames 41, 42 and the rear end portions 41b, 42b, and is installed in the width direction of the aircraft. The front lower surface of the installation portion 31 is placed and fixed on the support member 49, and the front support member 71 of the driver's seat 7 is connected via a connection member.

The rear part of the driver's seat 7 is arranged just above the top of the frame forming the substantially triangular shape in this way, and the central parts 41 a and 42 a of the body frame 4 and the body frame are arranged. 4 to support the rear ends 4 1 b and 4 2 b of the rear connecting frames 4 3 and 4 4 and to support the rear lower ends 4 3 b and 4 4 b of the rear end of the frame with the mission case 6. As a result, The vertical load at the top and in the mission case.

6 makes it possible to support firmly. For this reason, the body frame 4 itself does not need to have much rigidity, so that the weight of the body frame 4 can be reduced and the number of parts can be reduced. Also, the front of the driver's seat 支持 is not supported by the rear cover 30 as in the conventional case, but by the pipe stays 49 installed on the vehicle body frame 4. The rear cover 30 is bent. No trouble occurs.

In addition, since the body frame 4 is formed in a triangular shape in a side view, it is possible to effectively use a space in an inner side portion thereof, and it is possible to make the entire body compact.

In addition, as described above, the middle part 6b of the Mitssion Case 6 is substantially at the center of the reinforcing center frame 46, which is installed in the width direction of the side frames 41 and 42, in a plan view. A mounting member 47 to be connected is provided, and the other end of the mounting member 47 is connected to a base 15a of a hydraulic lifting cylinder 15 for raising and lowering the planting section 9. The connection point 47a of the mid-section of the mission case 6b, the fixed point 47b of the center frame 46, and the mounting point 47c of the lifting cylinder 15 are three points. They are arranged in order so as to be located on substantially the same straight line as the straight line direction in which the force of the lifting cylinder 15 is applied in a side view.

Therefore, the strength against the torsional force applied to the mission case 6 from the wheels can be increased, and the center frame 46 receives only the tensile pressure mainly by the lifting cylinder 15, which is further advantageous in strength. Accordingly, the weight and compactness of the vehicle body frame 4 itself can be realized, and the cost can be reduced.

As described above, only by connecting the front, rear, and center of the mission case 6 to the body frame 4, the horizontal, vertical, The rigidity and strength in the torsional direction can be improved. And, despite the small number of attachment points, the mission case 6 together with the body frame 4 is an effective strength reinforcing member of the rice transplanter.

Next, the internal mechanism of the mission case 6 will be described with reference to FIGS. FIG. 14 is a schematic side view showing a mechanism in a mission case of a traveling vehicle of the riding rice transplanter according to the present invention, and FIG. 15 is a view of an interior of the mission case of the traveling vehicle of the riding rice transplanter according to the present invention. FIG. 16 is a schematic plan view showing the mechanism at the rear of the vehicle, FIG. 16 is a schematic plan view showing all the mechanisms in the mission case of the traveling vehicle of the riding rice transplanter according to the present invention, and FIG. Ku schematic side view showing a mechanism for transmitting the power to the Mi Ssho Nkesu from Enjin the traveling vehicle, the first FIG. 8 is a schematic plan view also showing the mechanism for transmitting power from the engine to the Mi Tsu tio Nkesu _c A transmission chamber 60 in which a traveling transmission mechanism is provided is formed at the front of the mission case 6, and front and rear casings 37 are integrally fixed to both left and right sides of the transmission chamber 60. ing. An axle case is fixed downward from the left and right ends of the front axle case 37, and a front wheel axle 66 for fixing the front wheel 2 to the lower end of the axle case is supported. A cylindrical rear axle case 38 having a shaft center in the left-right direction is formed at the rear end of the case 6, and a rear wheel drive shaft 69 is provided in the rear axle case 38. Supported. Further, rear wheels 3 are fixedly provided at both left and right ends of the rear wheel drive shaft 69, so that the conventional transmission case is eliminated.

As described above, when the front axle case 37 and the rear axle case 38 are provided integrally with the mission case 6, the wheels 2 and 3 can be supported by the mission case 6, and As described above, a part of the frame as a body strength reinforcing member can be carried, —The burden on project 4 can be reduced. In addition, the mission case

A plurality of ribs 6f are formed on the inner surface of 6 to increase the section modulus, and the mission case 6 is a rigid case.

An input shaft 56 is supported on the upper part of the transmission chamber 60 of the mission case 6 in the left-right direction. The left end of the input shaft 56 projects outward, and a driven pulley 55 is fixed. The power from the drive pulley 53 fixed to the output shaft 52 protruding from the left side of the engine 5 to the side from the left side of the engine 5 is transferred into the mission case 6 via the belt 54. Has been entered. The belt 54 is configured to be tensioned by a tension port 58 attached to the tip of a tension arm 57, so that the main clutch pedal 74 can be depressed and operated. The connection and disconnection of power are performed in conjunction with the shift operation of the seedling lever 76. In addition, the belt 54 wound around the drive pulley 53 on the engine 5 side, the driven pulley 56 on the mission case 6 side, and the mission case 6 are disposed substantially in a straight line. The power transmission path for transmitting power to the front wheels 2 and the rear wheels 3 has a space-saving and efficient arrangement.

A main transmission shaft 61 is supported at the front lower portion of the input shaft 56, and a front wheel drive shaft 62 is supported at the front lower portion of the main transmission shaft 61, so that the power input to the input shaft 56 is substantially reduced. It is designed to be transmitted to the lower front. The front wheel shaft 66 of the front wheel 2 is disposed vertically below the front wheel drive shaft 62, and forms a power transmission path for transmitting the power of the input shaft 56 linearly and vertically downward. I have. As a result, the power transmission path can be shortened, a simple configuration with less power loss can be achieved, and the length of the axle case in the vertical direction can be shortened, resulting in cost reduction. it can.

In front of the input shaft 5 6 and above the main transmission shaft 6 1, The input shaft 56 and the main transmission shaft 61 are arranged in a substantially isosceles triangle with the auxiliary transmission shaft 63 at the apex in a side view. The configuration is simple.

The driving force to the rear wheel drive shaft 69 for driving the rear wheel 3 is

The transmission is transmitted from the main transmission shaft 61 between the front wheel drive shaft 62 and the front wheel drive shaft 62 to the rear axle drive unit at the rear lower part through the chain 70 through the chain 70. A power transmission path is configured in the front, rear, and lower directions, which are the installation directions.

In other words, the rear axle drive section at the rear of the mission case 6 has a driven shaft 67, a coaxial shaft 68, and a rear wheel drive shaft 6 facing downward and rearward along the direction in which the mission case 6 is arranged. 9 are arranged in order, the chain Ί0 is transmitted to the driven shaft 67, and the rear wheel drive shaft is transmitted via the counter shaft 68.

The power is transmitted to the rear wheel drive shaft 69, and the drive transmission path is transmitted to the rear wheel drive shaft 69 in a straight line from the front to the rear in accordance with the direction in which the mission case 6 is arranged. Simple, space-saving and efficient The arrangement of the power transmission path is good. Also, since this power transmission path is the shortest path,

The length of 70 can be shortened, and the cost can be reduced. Furthermore, since the height position of the rear wheel drive shaft 69 is located below the vehicle body frame 4, the diameter of the rear wheel 3 can be reduced, so that the size of the traveling vehicle can be reduced. ing. Here, the chain 70 is used to transmit power to the rear axle drive unit. However, the configuration to transmit power is limited to an endless body such as the chain 70. Instead, a transmission shaft can be used.

A power connection / disconnection mechanism and a control mechanism are provided in the rear axle drive section of the rear part of the mission case 6, and as shown in Fig. 17, the left and right central parts of the driven shaft 67 are provided. Boss part 101 is fixed to the outside of the boss part 101 A sprocket 100 is fixed on the peripheral surface, and a chain 70 is wound. Sliding gears 102 are spline-fitted to the driven shafts 67 on both the left and right sides of the boss 101, and the number of teeth of the sliding gears 102 and that of the side clutches 103 are the same. The parts are integrally molded to reduce the number of parts and to facilitate assembly. An inner gear 104 pivotally supported on the countershaft 68 is combined with the sliding gear 102, and an outer gear 105 integrally formed with the inner gear 104 has a rear wheel drive shaft 69. The gear 106 fixed to the vehicle is combined.

A fork fixed to the operation shaft 107 pivotally supported on the lower surface of the mission case 6 is fitted to the sliding gear 102, and an arm 108 fixed to the lower part of the operation shaft 107 is fitted. By rotating this, the operation shaft 107 rotates, and the sliding gear 102 slides.

When the sliding gear 102 is slid inward, the inside of the sliding gear 102 is engaged in the boss 101 to transmit power, and the rear wheel drive shaft 69 is driven. . When the sliding gear 102 is slid outward, the boss portion 101 is disengaged from the sliding gear 102, power transmission is disengaged, and at the same time, the sliding gear 102 is disengaged. A brake mechanism 130 composed of a pad formed at the outer end and a holding body is actuated, the rotation of the sliding gear 102 is braked, and the rotation of the rear wheel drive shaft 69 is stopped. You.

As described in detail above, according to the riding rice transplanter of the present invention, since the body cover having the main step and the auxiliary step is formed integrally, the production and assembly are facilitated, and the number of parts is reduced. The cost can be reduced.

Further, according to the riding rice transplanter of the present invention, since the connecting portion is provided between the main step and the auxiliary step, the strength of the auxiliary step can be kept effective, and the auxiliary step is connected to the front wheel. Located between the rear wheels The front and rear wheels can also be used as a cover, so even if you slide your foot forward and backward from the assisting step in the evening, there is a danger of your feet getting caught in the front or rear wheels. Absent.

Further, according to the riding rice transplanter of the present invention, since the connecting portion is provided with the opening portion on the wall surface extending downwardly of the body of the opening portion, when the operating step is put on the auxiliary step In addition, the tip of the foot can be inserted into the opening, so that even a small auxiliary step can be safely entered and exited. Furthermore, since the width in the lateral direction of the aircraft can be made as small as possible, compactness in the lateral direction of the aircraft can be achieved.

Further, according to the riding rice transplanter of the present invention, a recess is formed in a plan view on a wall portion extending downwardly of the main step body, and further, the auxiliary step is provided below the main step and the body below. Since it is located outside in plan view from the edge of the wall that extends in the past, it is easy to confirm the position of the auxiliary steps.

Further, according to the riding rice transplanter of the present invention, the opening of the connecting portion is located outside the edge of the main step and the wall surface extending downward from the main body in plan view, so that the main Mud on the step does not fall on the trapping step, falls on the ground from the opening, and when the operator puts the foot on the step, the foot can be securely supported on the entire surface of the step. You can get on and off safely.

Further, according to the riding rice transplanter of the present invention, since the support member for supporting the vehicle body cover is provided in the vicinity of the auxiliary step, the load applied to the main step and the auxiliary step vertically downward can be reliably supported. The deflection of the main step and the auxiliary step when Pele is getting on and off the aircraft can be effectively reduced, and the slipping of the foot due to the deflection can be prevented. Further, according to the riding rice transplanter of the present invention, since the support member for supporting the vehicle body cover is attached to the front axle case, it supports a vertically upward load applied from the front wheels to the front axle case during work. It is possible to reduce the number of parts as a whole, thereby achieving weight reduction and cost reduction.

Further, according to the riding rice transplanter of the present invention, since the load on the driver's seat is received near the apex of the vehicle frame having a substantially triangular shape in side view, it is not necessary that the vehicle frame itself has such a high rigidity. Therefore, the weight of the vehicle body frame can be reduced, and the number of parts can be reduced, leading to cost reduction.

Further, according to the riding rice transplanter of the present invention, the bottom of the substantially triangular body frame is provided with a front wheel drive shaft, a rear wheel drive shaft, and a power transmission mechanism for transmitting power to them. The connection with the transmission case allows the load applied to the driver's seat to be supported by the transmission case, resulting in a rigid and compact rice transplanter.

Further, according to the riding rice transplanter of the present invention, the support structure for the wheels and the like, the power transmission configuration in the mission gauge, and the like are simple, and the overall configuration of the traveling vehicle is simplified, so that the assembling work is also easy. In addition, the weight and size are reduced without losing the rigidity, so that the entire system can be manufactured at low cost without cost.

Further, according to the riding rice transplanter of the present invention, since the body cover having the main step and the auxiliary step is integrally formed, the number of components can be reduced as a whole, and the cost can be reduced.

In addition, according to the riding rice transplanter of the present invention, a frame having a substantially triangular shape in side view is formed by the body frame and the mission case, and the driver's seat is installed near the apex to receive the load. , Body flex The plant can be made lighter and a compact rice transplanter can be realized as a whole.

Claims

The scope of the claims

1. A planting part on an airframe equipped with a front wheel and a rear wheel, a vehicle body cover covering an upper part, a main step installed on the vehicle body cover, and auxiliary steps for getting on and off the main step. In the rice transplanter equipped with

The riding rice transplanter according to claim 1, wherein the vehicle body cover is formed integrally with the main step and the auxiliary step.

2. The assisting step is located between the front wheel and the rear wheel, and the main step and the catching step each include a wall surface extending downward from the main step toward the lower side of the fuselage, and a side view. 2. The riding rice transplanter according to claim 1, wherein the rice transplanting machine is connected via a connecting portion including a side surface having a shape along the front wheel and the rear wheel.

3. The riding rice transplanter according to claim 2, wherein an opening is provided in a wall surface of the connecting portion extending downward from the body.

4. The riding rice transplanter according to any one of claims 1 to 3, wherein an edge portion of the main step and a wall surface extending downward of the body is formed in a concave shape toward the inside of the body in plan view.

5. The riding rice transplant according to any one of claims 1 to 4, wherein the auxiliary step is located outside the fuselage in plan view from an edge of the main step and a wall surface extending downward from the fuselage. Machine.

6. The aperture according to any one of claims 2 to 5, wherein the opening of the connecting portion is located outside the fuselage in a plan view from an edge of the main step and a wall surface extending downward from the fuselage. Riding rice transplanter.

7. The riding rice transplanter according to any one of claims 1 to 6, further comprising a support member that supports the vehicle body cover near the auxiliary step.

8. The support member is a front axle casing that supports the front wheel. 8. The rice transplanter according to claim 7, wherein the rice transplanter is mounted on a rice plant.

9. In a passenger rice transplanter in which a power section and a planting section are arranged on an airframe with front and rear wheels and a driver's seat above,

A riding rice transplanter characterized in that the airframe is provided with a substantially triangular body frame that is upwardly convex in a side view and that supports the load of the driver's seat near one vertex thereof.

10. A drive shaft for the front wheels, a drive shaft for the rear wheels, and a power transmission mechanism for transmitting power from the power unit to the two drive shafts, and a bottom of the substantially triangular body frame. 10. The riding rice transplanter according to claim 9, further comprising a mission case constituting the vehicle.