TWI505770B - Riding type agricultural working machine - Google Patents

Description

Passenger type farming machine

The present invention relates to an agricultural working machine driven by an engine like a passenger type rice transplanter.

As an example of a passenger type agricultural machine, there is a passenger type rice transplanter. The passenger-type rice transplanter includes, as a main component, a traveling vehicle body supported by the front wheel and the rear wheel, and a rice transplanting device disposed behind the traveling vehicle body, and the rice transplanting device is height-adjustably coupled to the traveling vehicle. body. The vehicle body is equipped with a seat and a steering wheel, and is equipped with an engine, and is driven by the power of the engine. Furthermore, the traveling vehicle body may also be referred to as a traveling portion.

The traveling vehicle body usually includes a chassis (frame and frame) composed of a frame material (steel material) such as a steel pipe or a channel material, and generally includes a left and right side frame extending longitudinally in the front-rear direction as a main component of the skeleton. And the left and right side frames are connected by a horizontally long member. A link device is coupled to the rice transplanting device and the traveling vehicle body so as to be relatively rotatable, and the traveling vehicle body and the link device are coupled by the hydraulic cylinder.

The specific configuration of the case where the engine is disposed in the vicinity of the driving pedal and is placed in the rear, and the engine is disposed in the vicinity of the driving pedal is described in, for example, Patent Documents 1 and 2. That is, in Patent Document 1, the engine is supported by the left and right side frames constituting the chassis, and the part supporting the engine in the side frame is in a horizontal posture. On the other hand, in Patent Document 2, the front portion of the side frame is formed as an inclined portion that is lower toward the front end, and the engine is supported by a member coupled to the inclined portion.

A configuration similar to that of Patent Document 1 is disclosed in Patent Document 3. In the case of Patent Document 3, the left and right side frames 44 are curved so as to be viewed from the side when the rear half is moved rearward (that is, the rear half is formed as an inclined portion). The left and right side frames 44 are connected to the front portion of the left and right side frames 44 by the left and right horizontally long front frames 41. On the other hand, the rear ends of the left and right side frames 44 are respectively fixed to the upper side of the frame 43 after the rear axle box 38 is raised, and Then, the upper end of the strut 43 is bent to form a left and right horizontally long rear frame.

Further, in Patent Document 3, the transmission case 6 extends to the rear axle box 38, and the power is transmitted to the rear wheels by the built-in chain disposed in the rear half of the transmission case 6. Further, the front and rear middle portions of the left and right side frames 44 are connected by the intermediate frame 175 penetrating therethrough, and the bracket 176 is fixed to the intermediate frame 175 and the transmission case 6, and the lifting cylinder is coupled to the bracket 176.

[Previous Technical Literature] [Patent Literature]

(Patent Document 1) Japanese Patent No. 4139669

(Patent Document 2) Japanese Patent Laid-Open Publication No. 2000-201510

(Patent Document 3) Japanese Patent No. 3804926

In terms of ensuring driving stability, it is preferable to drive the vehicle body to reduce the center of gravity as much as possible. Moreover, because the engine has considerable weight, reducing the position of the engine is quite helpful in reducing the center of gravity of the body. Therefore, in Patent Document 2, since the installation height of the engine can be reduced, it is possible to contribute to the low center of gravity of the traveling vehicle body. However, if the front portion of the side frame is tilted, the support structure of other members supported by the front portion of the side frame must be greatly changed, which may result in an increase in overall design cost and manufacturing cost.

In other words, if a passenger-type agricultural machine is used as an example, as disclosed in, for example, FIG. 2 of Patent Document 1, the hood of a person is mostly arranged to extend to the left and right sides of the engine, and the hood is extended. The left and right sides of the engine are supported by the side frame directly or via the bracket. However, if the front side of the side frame is tilted as in Patent Document 2, the support structure of the hood must be changed, resulting in design and The cost of manufacturing increases.

Further, as shown in FIGS. 1 and 2 of Patent Document 1, in the passenger-type agricultural machine, a pair of left and right preliminary seedlings are disposed in front of the side frame, and the preliminary seedlings are often fixed to the side frame via the bracket, but When the front side of the side frame is tilted as in Patent Document 2, it is necessary to change the support structure of the preliminary seedling stage, and the cost of design and manufacture related to the support part of the preliminary seedling table is increased.

It is an object of the invention to improve this situation. On the other hand, in Patent Document 3, since both the gearbox and the rear axle box have a structure material (strength member) for supporting other members, it can be said that the structure of the traveling body can be simplified and the cost can be reduced. Another object of the present invention is to further improve the rigidity of the traveling body when the gearbox or the rear axle box is used as the structural material of the traveling body in the same manner as in Patent Document 3.

In addition, this case reveals a number of new components, but the provision of such new components can also be considered as part of the purpose of this case. That is, the new constitution disclosed in the present case should be understood as an independent invention regardless of whether or not the request item is recorded.

The basic structure of the passenger-type agricultural machine of the present invention includes a traveling vehicle body for riding and maneuvering and an engine mounted on the exercise vehicle body, and the traveling vehicle body includes a chassis and a traveling gearbox disposed under the operating seat. The chassis is constructed of a frame material and transmits power from the engine to the interior of the travel gearbox.

This case contains several inventions. According to a first aspect of the invention, in the basic configuration, the chassis and the transmission are disposed in a state in which the transmission is located below the chassis, and are disposed in front of or behind the transmission, or in front and rear of the transmission. The component support portion on the upper surface of the gearbox is more biased downward. In addition, as a specific example of the component support portion, for example, the support frame 55 for engine support (an example of the front member support portion) shown in FIG. 3 or the support for the fuel tank support shown in FIG. 11(A) can be cited. Material 38 (an example of a rear side member support portion).

According to a second aspect of the invention, in the chassis of the chassis, the engine support portion on the engine is placed on the engine support portion of the engine, and the lower end of the engine support portion is located below the upper surface of the transmission and is more downward. The state is downwardly protruded as a front side member support portion located before the transmission, and the engine is supported by the engine support portion in a state where the lower surface thereof is sunk below the chassis.

According to a second aspect of the invention, the chassis is configured to connect the left and right side frames extending in the front-rear direction by a horizontally long frame, and the engine support portion is provided in a front portion of the left and right side frames.

According to a third aspect of the invention, the engine support portion includes one or a plurality of support frames formed in a U-shape that is open upward in a front view, and is attached to a bottom portion of the support frame via a buffer body. The above engine.

According to a fourth aspect of the invention, the plurality of support frames are arranged side by side in a row, and the plurality of support frames are connected by one or a plurality of reinforcing bodies protruding below the support frame.

According to a sixth aspect of the invention, in the first aspect of the invention, the axle device before the front wheel is supported, and the axle box after the rear wheel is rotatably supported behind the gearbox, the gearbox and the rear The axle box is coupled by a lower connecting body located further below the upper surface of the gearbox, and the lower connecting body is provided with a rear side member supporting portion located behind the gearbox (for example, FIG. 11(A) Support material 38) for fuel tank support.

According to a seventh aspect of the invention, the chassis includes: a left side frame extending in a front-rear direction, a left and right horizontally long intermediate frame connecting the left and right side frames in a front-rear direction portion thereof, and the left and right side frames The left and right horizontally long rear frames connected to the rear end portion are supported by the rear axle box through the rear pillars, and the intermediate frame or the left and right side frames and the lower connecting body are coupled by the reinforcing body.

According to a seventh aspect of the invention, the reinforcing system has a U-shape that is upwardly open when viewed from the front, and is lower as it goes backward, and is inclined forward when viewed from the side, and is provided by the reinforcement described above. The fuel tank is supported by the body bottom rear side member support portion.

According to a seventh aspect of the invention, the reinforcing body is formed of a steel pipe and formed into a frame structure, and the reinforcing body is formed into a substantially U-shaped or substantially V-shaped shape when viewed from the front (an inverted trapezoid or a semicircle may also be used). Form of shape).

According to a tenth aspect of the present invention, the side frame of the present invention, wherein the side frame is divided into a front side frame in a substantially horizontal posture in a front side of the intermediate frame, and a rear side of the intermediate frame, and a rear side of the intermediate frame In the side frame, the rear side frame is fixed to the intermediate frame at a position closer to the left and right sides than the front side frame, and the reinforcing body is fixed to the intermediate frame at a portion near the front end of the rear side frame.

According to a first aspect of the present invention, in the rear member rear support member, the engine support portion for mounting the engine is disposed such that the lower end of the engine support portion is located above the gearbox The surface is placed in a state of being biased downward, and the engine is supported by the engine support portion in a state where the lower surface is sunk below the chassis.

According to the first aspect of the invention, the member support portion is provided in front of or behind the transmission, or on the front and rear sides, whereby the member (for example, the engine or the fuel tank) can be disposed while reducing the state of the center of gravity. Therefore, the center of gravity of the traveling vehicle body can be lowered to improve running stability. Furthermore, the traveling vehicle body may also be referred to as a traveling portion.

The engine has considerable weight and its height position has an impact on the center of gravity of the car. Therefore, when the engine is supported by the front member support portion as in the second aspect of the invention, the engine is placed below the chassis, and the center of gravity of the traveling vehicle body can be reliably reduced. Therefore, it is very advantageous to improve driving stability. As to which components are supported by the component support portion, it can be selected according to the type or configuration of the work machine.

Patent Document 2 is a type in which the front portion of the side frame is inclined. Therefore, it can be applied only to a type in which the engine is disposed at the front portion of the chassis. However, in the present invention, as described in the eleventh invention, the engine support portion may be disposed at the shifting speed. Behind the box. In other words, the engine support portion of the second invention can also be used as the rear member support portion. Therefore, in the present invention, it can be said that the flexibility of the arrangement position of the engine is high.

Further, in Patent Document 2, in order to reduce the support height of the engine, it is necessary to increase the inclination angle of the frame (chassis) or to increase the total length of the inclined portion. However, in the third invention of the present invention, the engine support portion is coupled to The chassis, so the engine support can be designed without the limitation of the chassis. Therefore, the height of the support engine can be arbitrarily set without being limited by the chassis.

Further, in the third invention of the present invention, since the chassis does not need to be largely changed in order to provide the engine support portion, it is not necessary to greatly change the support structure of the other members, and therefore, it is possible to prevent or suppress the design cost or the manufacturing cost caused by the installation of the engine support portion. increase.

In the configuration of the third aspect of the invention, since the engine support portion has a frame structure that is open at the front and rear, the lower portion of the engine can be opened to the air, so that the traveling wind can easily pass through the cylinder block or the cylinder head, and as a result, the cooling performance can be improved. . Moreover, since the engine support portion can also be used as a frame reinforcing body that connects the left and right side frames, the rigidity of the chassis can be improved.

For example, the engine support portion can be formed in various forms and structures such as sheet metal. However, if the U-shaped support frame is viewed from the front as in the fourth invention, the engine can be firmly supported by the structure.

In the case of the fourth invention, if the engine is supported from the front and rear sides, stability can be ensured. Therefore, the support frame is preferably arranged in plural numbers before and after, but if the support frame is provided in front and rear as in the fifth invention By connecting the plurality of support frames by the reinforcing body, the support function of the engine can be surely ensured, and the rigidity of the support frame can be remarkably improved, which is preferable. Further, in the configuration of the fifth aspect of the invention, since the reinforcing system protrudes below the support frame, the reinforcing body also has a protective effect against the engine, and therefore is excellent in terms of safety.

According to the sixth aspect of the invention, the transmission case and the rear axle box can be used together as the strength member of the traveling body. Therefore, the vehicle body can be made lightweight while ensuring rigidity. Moreover, members and devices such as a fuel tank can be supported by the lower connecting body, but since the lower connecting body is located at a lower side than the upper surface of the gearbox, the supported member can be configured as low as possible. As a result, it is advantageous to improve the stability or densification of the traveling vehicle body.

According to the seventh aspect of the invention, since the side frame or the intermediate frame is coupled to the lower connecting body, the chassis and the lower structure can complement each other strongly, and as a result, the traveling body can have a very high rigidity. Therefore, even a large rice transplanter such as, for example, 8 rows or 10 rows can ensure high firmness. Moreover, since it is possible to ensure high robustness, it is also possible to easily perform heavy-duty work by installing a work machine other than the planting body in the traveling body. As described above, even if the member support portion is not provided, the advantage of ensuring the robustness can be exerted. Therefore, it is possible to separate the chassis and the lower connecting body by the reinforcing body as an independent invention.

As described above, the passenger-type rice transplanter rotates the link mechanism by the hydraulic cylinder to raise and lower the rice transplanting device, and the hydraulic cylinder is of course subjected to a large load. Therefore, if the cylinder is connected to the lower portion as in the embodiment For the connected body, the lower connecting body will be subjected to a large bending load. However, in the seventh invention of the present invention, the chassis and the lower connecting system are coupled by the reinforcing body, whereby the resistance of the lower connecting body to the bending force can be remarkably improved, and therefore, even in the case where the cylinder is mounted, It ensures high strength.

According to the eighth aspect of the invention, since the fuel tank can be placed below the chassis, the fuel tank can be increased in capacity.

The reinforcing body can be made of various materials such as a plate or a steel, and its form can be expressed in various forms. However, according to the ninth invention, the reinforcing body can be easily manufactured by bending a steel pipe, and is excellent in cost. Further, the load on the left and right front wheels and the left and right rear wheels of the traveling body generally differs depending on the difference in conditions on the road, and because of the unevenness of the load, the torsional force is likely to act on the traveling body, but in the ninth invention, the reinforcing force is applied. The body has a bilaterally symmetrical shape, so that the traveling body can exert a strong strength for twisting.

According to the tenth aspect of the invention, since the front end of the rear side frame is supported by the reinforcing body in the vicinity of the immediately below the reinforcing body, the reinforcing function of the reinforcing body can be more accurately exerted, so that it can be further adapted to the strength improvement.

Next, an embodiment of the present invention will be described based on the drawings. This embodiment is applied to a passenger type rice transplanter (hereinafter simply referred to as "plugging machine"). In the following description and claims, in order to specify the direction, the terms "before and after" and "left and right" are used, and these terms are indicated by the operator who is seated in front of the rice transplanter. The front viewing direction refers to the direction observed from the direction opposite to the forward direction of the rice transplanter.

(1) Summary of rice transplanter

First, the outline of the rice transplanter will be described. As shown in FIGS. 1 to 2, the rice transplanter includes the traveling vehicle body 1 and the rice transplanting portion 2 as basic elements, and the rice transplanting portion 2 is connected to the rear portion of the traveling vehicle body 1 so as to be movable up and down via the link device 3. The insertion portion 2 can be detachably attached to the link device 3, and can be a non-loadable type.

The traveling vehicle body 1 is supported by the left and right front wheels 4 and the rear wheels 5, and the front wheels 4 and the rear wheels 5 are driven by power. Furthermore, the rear wheel 5 can be mounted with an auxiliary wheel and configured as a two-wheel or a three-wheel type. Further, the traveling vehicle body 1 includes a backrest seat 6 for the driver to sit on, and a steering wheel 7 disposed in front of the vehicle. The seat 6 and the steering wheel 7 are disposed at the left and right intermediate positions of the traveling vehicle body 1. A preliminary seedling table 8 (see FIG. 2) is disposed in front of the seat 6 and on the left and right sides. Furthermore, in Fig. 2, the preliminary seedling table 8 only shows the skeleton.

For example, as can be understood from FIGS. 3 to 5, the traveling vehicle body 1 includes left and right front side frames 9 and rear side frames 10 extending in the front-rear direction. The left and right rear side frames 10 are spaced apart from each other by the front side frame 9, and the front and rear side frames 9 and 10 are connected via the intermediate frame 11 which is horizontally long and left. The left and right front side frames 9 are connected to the front end portion thereof by the front frame 12.

The rear side frame 10 is inclined rearward when viewed from the side as it goes rearward, and the left and right horizontally long rear frames 13 are coupled to the rear ends of the left and right rear side frames 10. Left and right rear pillars 14 for supporting the rear frame 13 are fixed. The rear pillars 14 are disposed on the inner side of the rear side frame 10 . In each of the frames, the intermediate frame 11 and the rear frame 13 are round pipes (circular steel pipes), and the other frames are angle pipes (angled steel pipes).

A rear horizontally long stay 17 is disposed slightly in front of the rear frame 13, and the rear horizontally long stay 17 is fixed to a hanger bracket 18 having a substantially U-shape under front view ( 4 and 5), the hanger type bracket 18 is welded to the rear side frame 10.

A door type (inverted U-shaped) frame 19 that is opened downward is fixed to the front end portion of the right and left rear side frames 10, and the front end portion of the seat portion supporting unit 20 (see FIG. 1) is fixed to the door frame 19. The rear portion of the seat support unit 20 is fixed to a stay (not shown). A fuel tank 21 is disposed below the seat 6, and the fuel tank 21 can be refueled if the seat 6 is tilted forward.

A plurality of outer branches 15 protruding to the left and right outside are fixed to the front side frame 9, and the preliminary seedling table 8 is supported via the branch frame 15. Further, an auxiliary frame 23 that is horizontally long and rearward is disposed on the outer side of the side frames 9, 10, and the auxiliary frame 23 is fixed to the branch frame 15, the rear horizontally long stay 17, and the rear frame 13.

In the present embodiment, the chassis (frame structure) is constituted by frame materials such as the front and rear side frames 9, 10, the intermediate frame 11, the front frame 12, and the rear frame 13. As shown in FIG. 2, the manned portion of the traveling vehicle body 1 is covered by the hood 24, and the hood 24 is supported by the front side frame 9, the branch frame 15, the auxiliary frame 23, and the rear horizontally extending struts 17, Supported by the rear frame 13 and the like. The fertilizing device is often disposed after the seat 6, but the illustration is omitted in the present embodiment.

The steering wheel 7 is attached to a steering wheel shaft built in a handle post 25. As shown in FIG. 2, the portion between the seat 6 and the steering column 25 in the hood 24 serves as an operating pedal 24a for the person to stand in a standing or seated state, and an engine 26 (engine) is disposed on the near front side of the operating pedal 24a. The support structure of 26 will be described later). The engine 26 is covered by the engine bonnet from the front and rear.

For example, as shown in FIG. 5, a gearbox 27 having a gear train built therein is disposed behind the engine 26. For example, as shown in FIG. 3, an HST (hydraulic stepless transmission) 28 as an example of a continuously variable transmission is attached to the left side surface of the transmission case 27, and the power of the engine 26 is borrowed once. It is transferred by the conveyor belt 29 to the HST 28 and then to the gear set. In the transmission case 27, a clutch or a brake is incorporated in addition to the gear train, but it is not directly related to the present invention, and thus the description thereof will be omitted.

For example, as shown in FIG. 5, a tension pulley 30 is abutted on the conveyor belt 29 from below. The tension pulley 30 is attached to the front end of the rotary arm 31. A power steering unit 32 is attached to the front portion of the transmission 27, and a steering column 25 is fixed to the power steering unit 32.

For example, as shown in FIG. 3, a front axle device 33 is attached to the left and right side faces of the transmission case 27, and a front wheel 4 is attached to the front axle device 33. The rear wheel 5 is attached to the rear axle box 34. The rear axle housing 34 includes left and right rearward projecting portions 34a, and a rear wheel 5 is fixed to an axle projecting from the rearward projecting portion 34a. Further, the cross member 35 is fixed across the left and right rearward projecting portions 34a, and the rear pillars 14 are fixed to the cross member 35.

As can be understood from FIGS. 3 to 5, the rear end of the transmission case 27 and the front end of the rear axle housing 34 are coupled by a circularly controlled lower joint (joint) 36, and the lower link 36 and the intermediate frame 11 are As an example of the reinforcing body, a U-shaped reinforcing frame 37 is connected in front view. A fuel tank 21 is disposed between the lower connecting body 36 and the seat 6, and the fuel tank 21 is supported by the lower connecting body 36 via the supporting material 38. The support material may also be referred to as a rear support.

Further, as shown in FIGS. 3 and 4, the lower connecting body 36 is connected to the lifting cylinder (hydraulic cylinder) which is tilted rearward when viewed from the front end of the lifting cylinder via the bracket 40. 39. The link device 3 shown in Fig. 1 is rotated by the expansion and contraction operation of the lift cylinder 39, and the plug portion 2 can be moved up and down accordingly.

For example, as shown in FIG. 3, the rear wheel drive shaft 41 is disposed on the left side via the lower joint body 36, and the work power shaft 42 is disposed on the right side. Of course, the rear wheel 5 rotates in synchronization with the front wheel 4. When the ground rotor is provided, the ground rotor is driven by the rear wheel drive shaft 41. The insertion portion 2 is driven by the work power shaft 42 (the fertilizer application device is also driven by the work power shaft 42 when the fertilizer application device is installed). The working power shaft 42 transmits power to the transplanting portion 2 via the plant spacing adjusting device 43.

(2) Engine and its supporting structure

Next, the engine 26 will be described. The engine 26 of the present embodiment is a water-cooled diesel engine that is disposed such that the crankshaft is placed in a horizontally left and right lateral position. The engine 26 is basically the same as the previous one. For example, as can be easily grasped according to FIG. 6, the general elements include: a mechanical body 44 including a crankcase, a cylinder block, a cylinder head, and a mechanical body 44. The right side radiator (radiator) 45.

As shown in FIG. 6, the output shaft (crankshaft) 48 of the engine 26 protrudes from the left side surface of the machine body 44, and the flywheel 49 and the output pulley 50 are fixed to the output shaft 48. The power can be transmitted to the HST 28 (see FIGS. 1, 4, 5, and 10) by the conveyor belt 29 wound around the output pulley 50.

A muffler 51 is disposed on the left side of the flywheel 49. The muffler 51 is disposed between the front side frame 9 and the auxiliary frame 23 in plan view, and is suspended by the stays 52 fixed to the front side frame 9 and the auxiliary frame 23. The muffler 51 is covered by a cover 53 (refer to Fig. 9).

Further, as shown in FIG. 5, a circular plate 54 located inside the flywheel 49 is fixed to the left side surface of the machine body 44, and the rotary arm 31 to which the tension pulley 50 is attached is attached to the circular plate 54 via the bracket.

As shown in FIGS. 5 and 6, a support frame 55 is coupled to substantially the front half of the left and right front side frames 9, and the mechanical body 44 of the engine 26 is supported by the support frame 55. The support frame 55 is composed of a circular tube (a circular steel tube), and is configured to include a vertical portion (longitudinal portion) on the left and right sides and a U-shape that is horizontally long under the front view of the horizontal portion below the lower end thereof, and is suspended. The state is attached to the left and right front side frames 9. Furthermore, the support frame 55 can also be referred to as a front support portion.

The front and rear support frames 55 are connected to the left and right intermediate portions by a frame reinforcing body (connection frame) 56, and the support frames 55 and the frame reinforcements 56 constitute the engine support portion described in the request (front member support) unit). The frame reinforcing body 56 is bent downward to have a downward projection shape and protrudes below the support frame 55. Therefore, the frame reinforcement 56 also has the protective function of the engine 26.

A side bracket 57 is fixed to the right side portion of the front and rear support frames 55, and the radiator 45 is supported by the side bracket 57. The radiator 45 is supported by the side bracket 57 via a cushioning material such as rubber. The side bracket 57 includes a base portion that is horizontally long and frontward, and an inwardly projecting portion that protrudes laterally from the front and rear ends thereof. The support frame 55 is welded to the lower surface of the front side frame 9, but may be welded or screwed to the inner side or the outer side of the front side frame 9. Although not required to be described, the support frame 55 can also be fixed to the front side frame 9 via a bracket.

A pair of left and right lower brackets 59 supporting the engine 26 are fixed to the horizontal portion below the front and rear support frames 55 by welding. The front lower bracket 59 extends forward from the front side support bracket 55, and the rear lower bracket 59 extends rearward from the rear side support bracket 55, and each lower bracket 59 is relatively high in the front end thereof. Tilted horizontally. Therefore, the bracket 59 on the front and rear lower side is an inclined posture in which the interval is narrower as it goes downward.

On the other hand, as shown in Fig. 7, the brackets 60 on the left and right sides are fixed to the front and rear surfaces of the lower portion of the machine body 44 by screws 61, respectively. The upper bracket 60 is formed in a substantially L-shaped cross section, and is provided at its left and right end portions with a support piece 60a extending in parallel with the lower bracket 59, and inserted between the support piece 60a and the lower bracket 59. Vibration absorbing unit 62.

The vibration absorbing unit 62 is configured such that a cushioning material 65 such as rubber is interposed between the upper plate 63 and the lower plate 64 to integrally integrate the same, and the screw 66 is passed through the upper plate 63, the lower plate 64, and the cushioning material 65, and The screw 66 is screwed into the nut 67, thereby fastening the upper bracket 60 and the lower bracket 59. The upper plate 63 and the lower plate 54 of the vibration absorbing unit 62 are bent and formed with side plates 63a and 64a which are reinforced. The screw 66 may be fixed to either of the upper plate 63 and the lower plate 64, or may simply pass through both.

The support piece 60a of the upper bracket 60 is provided with a circular hole 68 into which the screw 66 of the vibration absorbing unit 62 is fitted. On the other hand, the lower bracket 59 is cut to form a slot 69 for inserting the screw 66 of the vibration absorbing unit 62. A circular hole may be formed in the lower bracket 59. However, if the screw hole 66 is formed from the front or the rear by forming the slot 69 as in the present embodiment, the assembly work of the engine 26 can be easily performed.

In the embodiment, the opening of the slot 69 is tapered, so that the insertion of the screw 66 can be easily performed. Further, as in the embodiment, the brackets 59 in the front and rear directions are placed in an inclined posture in which the distance is narrower as viewed from the side, and the engine 26 is placed in the front and rear brackets 59 due to its own weight. The tendency between the two has an excellent posture retention function.

As shown in FIG. 6, the bracket 70 is protruded rearward from the substantially right and left intermediate portions of the support frame 55 on the rear side. As shown in FIG. 6, a pin 71 is inserted through the front end of the rear bracket 70, and the rear bracket 70 is coupled to the transmission 27 by the pin 71. Therefore, in the present embodiment, the gearbox 27 also serves as a structural material (strength member) of the traveling vehicle body 1.

That is, in the present embodiment, the chassis is constituted by frame members such as the front and rear side frames 9, 10, the front frame 12, the intermediate frame 11, the rear frame 13, and the rear pillar 14, and the chassis and the gearbox 27 are provided. The lower connecting body 36 and the rear axle box 34 collectively constitute a skeleton of the traveling vehicle body 1.

(3) Summary

In the above configuration, the engine 26 is in a state of sinking downward from the lower surface of the front side frame 9, and at the same time, it is in a state of sinking downward from the upper surface of the transmission case 27, and is oriented as described above. The state of the lower sinking is supported by the support frame 55, so that the center of gravity of the traveling vehicle body 1 can be lowered to improve the running stability.

Further, since the front side frame 9 is only required to be in a horizontal posture, when the hood 24 or the preliminary seedling table 8 is supported, the outer branch frame 15 is fixed to the front side frame 9 in this direction. The outer branch frame 15 may be fixed by a simple support structure such as the auxiliary frame 23. Therefore, the complication of the surrounding configuration of the engine 26 due to the reduction of the engine 26 can be prevented.

If the engine 26 is supported by the support frame 55 fixed to the front side frame 9 as in the present embodiment, the space surrounded by the front frame 12 and the left and right front side frames 9 will become the space for the arrangement of the engine 26, so the front frame The 12 and left and right front side frames 9 also substantially have the protective function of the engine 26. This point is an advantage of this embodiment.

The engine 26 may be disposed vertically in the axially extending direction of the crankshaft. However, since the engine 26 is generally long in the axial direction of the crankshaft, there is a case where the length of the traveling vehicle body becomes long when it is placed vertically. On the other hand, if the engine 26 is disposed to be horizontally placed as in the present embodiment, there is an advantage that the traveling vehicle body 1 can be prevented from becoming long. Further, the transmission of power to the transmission can be easily performed by the conveyor belt 29.

Further, when the power of the engine 26 is transmitted to the transmission case 27 (HST 28) by the conveyor belt 29, the engine 26 and the transmission case 27 are pulled by the belt 29, and the force acts. In the embodiment, the support frame 55 on the rear side and the transmission case 27 are coupled via the rear bracket 70, and the distance between the support frame 55 and the transmission case 27 is kept fixed, so that the support frame 55 is not pulled by the support frame 55. As a result, the positional relationship between the engine 26 and the transmission 27 can be firmly maintained, and the fixing strength of the support frame 55 to the front side frame 9 can be ensured.

The side bracket 57 on which the radiator 45 is placed may be fixed to the front side frame 9. However, if it is fixed to the front and rear support frames 55 as in the present embodiment, the side bracket 57 can also serve as a reinforcing for fixing the front and rear support frames 55. Therefore, there is an advantage that the robustness of the engine support structure formed by the support frame 55 as a main body is remarkably improved.

(4) Cooling of the silencer

Since the silencer 51 of the engine 26 is heated to a high temperature due to the exhaust gas, it is preferable to perform cooling if possible. However, careful research on the cooling of the silencer 51 has not been conducted in the past. In spite of this, the provision of a fan or duct for cooling the muffler 51 is more disadvantageous in terms of cost.

On the other hand, in the present embodiment, the muffler 51 can be cooled while suppressing an increase in cost. That is, by using a technical means in which the muffler 51 is disposed in the vicinity of the flywheel 49, as shown in a modified example in Fig. 10, the cooling fan 72 is fixed to the outside of the flywheel 49, and the wind of the cooling fan 72 is used. To cool the silencer 51.

Since the cooling fan 72 is simply fixed to the outer surface of the flywheel 49 as described above, it does not cause a significant cost increase. The air blowing fins may be integrally formed on the flywheel 49. Furthermore, the silencer 51 may also include an afterburner function or an exhaust gas purification function.

(5) Construction of the rear half of the vehicle body

Next, a detailed structure of the vehicle body 1 in the rear side of the gearbox 1 will be described. First, the connection structure between the lower connecting body 36 and the transmission case 27, and the lower connecting body 36 and the rear axle box 34 will be described. This connection structure is clearly shown in Fig. 11(A). That is, the front support plate 74 is fixed to the front end of the lower connecting body 36 by welding, and is fastened to the rear surface of the transmission case 27 via the screw 74', and is fixed to the rear end of the lower connecting body 36 by welding. The rear support plate 75 is housed, and the rear support plate 75 is fastened to the front surface of the rear axle box 34 via the screw 75'.

The support plates 74 and 75 are formed in a square shape, but any shape may be selected as needed. As shown in Fig. 15, a convex fitting portion 36a that protrudes forward of the front support plate 74 is provided at the front end of the lower connecting body 36, and a convex fitting portion is formed on the rear surface of the transmission case 27. The concave fitting portion (not shown) is fitted into the 36a, and the fastening strength is improved by the fitting of the concave-convex fitting portions. A fitting portion may be provided in the lower connecting body 36 and the rear axle housing 34.

The reinforcing frame 37 is made of a round pipe (round steel pipe). This reinforcing frame 37 will be described below. For example, as shown in FIG. 12, the transmission case 27 is disposed below the upper surface of the intermediate frame 11, and the lower link body 36 is fixed to the lower end portion of the transmission case 27. As will be further described, the gear trains are arranged at different heights in the gearbox 27, so that the upper and lower dimensions of the gearbox 27 are quite different.

Since the lower connecting body 36 is fixed to the lower end portion of the transmission case 27, the lower connecting body 36 is disposed substantially below the front side frame 9 and the intermediate frame 11, and the rear wheel drive shaft 41 is viewed from the side and the lower side. The connecting body 36 is connected to the rear axle box 34 in a substantially parallel posture.

Further, the reinforcing frame 37 is in a forwardly inclined posture in a side view as the height is lower as it goes downward, and the upper and lower ends are fixed to the intermediate frame 11 by welding. Further, as shown in Fig. 16(A), a support material 38 having a downwardly open groove shape as viewed from the front side of the left and right lower piece 38a is fixed to the bottom portion 37a of the reinforcing frame 37, and the lower connecting body is formed on the other hand. The support bracket 77 is fitted to cover the support material 38, and the support material 38 and the support bracket 77 are coupled by the left and right horizontally long pins 78. Further, instead of the pin 78, a screw and a nut may be used, and the reinforcing frame 37 may be fixed to the lower connecting body 36 by welding.

A pair of left and right rubber seats 79 are disposed on the support material 38, and the lower surface of the fuel tank 21 is supported by the rubber seat 79. As shown in Fig. 16(A), a downward protruding portion 21a is provided in the vicinity of the support portion of the rubber seat 79 in the lower surface of the fuel tank 21, and the fuel outlet 80 is provided in the downward protruding portion 21a, and the fuel is provided. The outlet 80 is delivered to the engine 26 via a filter (not shown). Since the engine 26 is forcibly transporting fuel via a pump in a diesel mode, even if the outlet 70 of the fuel tank 21 is below the engine 26, it may be sufficient.

As shown in FIG. 12(B), the fuel tank 21 is provided with a pair of front and rear flanges 81, 82, and the front flange 81 is fixed to the tank bracket 83 fixed to the intermediate frame 11 by screws. On the other hand, the rear flange 82 of the fuel tank 21 is fastened to the bracket plate 18a provided in the hanger type bracket 18 shown in Figs. The fuel filler port 84 of the fuel tank 21 is located below the seat 6, and if the seat 6 is tilted forward, the fuel filler port 54 can be exposed.

For example, as can be clearly understood from Fig. 12(B), a step portion 85 which is open to the left side and the front side is formed on the upper surface of the fuel tank 21. For example, the hydraulic unit 86 can be disposed at a portion of the step portion 85. The hydraulic unit such as the hydraulic cylinder 39 can be controlled by the hydraulic unit 86. Of course, other members may be disposed in the portion of the step portion 85, and the step portion 85 may not be provided.

(6) Linkage mechanism and hydraulic cylinder

Next, the link mechanism 3 and the hydraulic cylinder 39 will be described. As shown in FIGS. 17 and 18, the link mechanism 3 includes an upper link 88 and a lower link 89 which are vertically divided, and the first pin 90 and the second pin are provided at the rear ends of the two links 88 and 89. The connector 92 is coupled to the 91 in a relatively rotatable manner. A king pin (not shown) is protruded rearward from the lower end portion of the connector 92, and the plug portion 2 is coupled via the king pin. Therefore, the insertion portion 2 can be rotated by only a certain degree with respect to the traveling body 1.

The upper link 88 is formed of a tube or a grooved steel material and has a substantially linear shape. The upper bearing cylinder 93 is fixed at the front end thereof, and the upper bearing cylinder 93 is embedded in the upper and lower rear pillars 14 Axis 94. Therefore, the upper link 88 can be coupled to the rear pillar 14 by rotating the front end thereof as a center. The upper support shaft 94 is cylindrical and has a third pin 95 embedded therein.

The lower link 89 is formed in a substantially Y shape having a front portion and a rearward bifurcation, and the lower bearing cylinder 96 is fixed to the front end, and the bearing cylinder 96 is fitted to the support shaft 97 fixed to the lower support post 14, Therefore, the lower link 89 can be coupled to the rear pillar 14 so that the front end thereof can be rotated up and down as a center. The lower support shaft 97 is also cylindrical and has a fourth pin 98 embedded therein.

The lower link 89 is connected to the intermediate link 99 which is horizontally long and horizontally long by the fifth pin 100 so as to rotate the rear end portion of the intermediate link 99 as a center. The intermediate link 99 is formed in a downwardly open groove shape, and a sixth pin 101 that is horizontally long and wide and hollow is inserted into the front end portion thereof. On the other hand, a pair of left and right arms 102 are protruded upward from the front end of the lower link 89, and the sixth pin 101 is supported from below via the left and right arms 102.

On the other hand, the hydraulic cylinder 39 includes a cylindrical body 39a and a piston rod 39b, and the base end of the cylindrical body 39a is coupled to the bracket 40 fixed to the lower connecting body 36 by the seventh pin 104, and on the other hand, the piston rod At the front end of 39b, a plate-shaped round hole hook 105 is fixed as shown in Fig. 17, and the hook 105 and the intermediate link 99 are coupled by the sixth pin 101 (see Figs. 17 and 18).

Therefore, when the hydraulic cylinder 39 is extended, the link device 3 is rotated downward to lower the insertion portion 2, and when the hydraulic cylinder 39 is contracted, the link device 3 is rotated upward to raise the insertion portion 2. A buffer accumulator 106 for relieving the impact is provided at the front end of the cylindrical portion 39a of the hydraulic cylinder 39. Further, the hydraulic cylinder 39 may be directly coupled to the arm 102 without using the intermediate link 99.

(7) Summary of the second half of the moving car body

As described above, in the present embodiment, since the transmission case 27 and the rear axle box 34 are also used as the structural material of the traveling body 1, the structure of the traveling body 1 can be simplified, which is advantageous for cost compression or weight reduction (due to The gearbox 27 or the rear axle box 34 is structurally strong in terms of its function, so that the function of the strength member can be fully utilized). Further, since the lower connecting body 36 and the intermediate frame 11 are coupled by the reinforcing frame 37, the lower structure formed by the gearbox 27 or the like and the chassis constituted by the side frames 9, 10 and the like can complement each other, and as a result, The whole can be an extremely strong structure.

The load of the insertion portion 2 acts on the hydraulic cylinder 39 as a tensile force, and the bending force acts on the lower coupling body 36 by the tensile force. However, since the reinforcing frame 37 is supported by the lower connecting body 36 from above, the lower connecting body 36 and the lower structure of the lower structure constituted by the gearbox 27 can be remarkably suppressed, and as a result, high rigidity can be ensured. Durability.

Since the fuel tank 21 is formed in a state surrounded by the reinforcing frame 37, the height of the fuel tank 21 can be reduced as much as possible irrespective of the presence of the reinforcing frame 37. Further, in the present embodiment, the support member 38 for connecting the reinforcing frame 37 can also serve as a supporting member for the fuel tank 21. Therefore, the structure can be simplified. Further, as shown, for example, in Fig. 12(A), a concave portion 107 for allowing the movement of the hydraulic cylinder 39 is formed on the lower surface of the fuel tank 21, so that the fuel tank can be lowered as much as possible without breaking the function of the hydraulic cylinder 39. twenty one. This point is also one of the advantages of this embodiment.

In the present embodiment, the side frame is divided into the front side frame 9 and the rear side frame 10, and the front and rear side frames 9, 10 are connected by the intermediate frame 11, whereby the front side frame can be easily changed. 9 and the size (thickness) or position and posture of the rear side frame 10. This point is one of the advantages of this embodiment.

Further, in the present embodiment, the rear pillar 14 is supported by the beam member 35 fixed to the rear axle box 34. By using the beam member 35 as described above, the load acting on the rear axle box 34 can be reduced and the durability can be improved, and the interval between the right and left rear pillars 14 can be freely set without being restricted by the interval of the rearward projecting portion 34a.

(8) Further reinforcement structure

Since there are irregularities on the farm or on the road, the support state (grounding resistance) of the four wheels 4 and 5 may become unbalanced as if, for example, one wheel is suspended, so that the vehicle body 1 may be driven. The own weight acts on the traveling vehicle body 1 as a force that is twisted around the axis of the front and rear. Therefore, if the reinforcing frame 37 is provided as in the embodiment, the rigidity of the structure including the chassis, the transmission 27, the lower connecting body 36, the rear axle housing 34, and the rear pillar 27 as a whole is significantly improved. The resistance to twisting can also be significantly improved.

Further, as shown in Fig. 19, in the present embodiment, the rigidity against twisting is further improved to obtain a reinforcing function. That is, the left and right sides of the reinforcing frame 37 are connected by the reinforcing struts 113 of the front and rear transverse lengths, and the reinforcing frame 37, the left and right reinforcing struts 113, and the rear axle box 34 are substantially square in plan view. The frame, thereby increasing the resistance to twisting (of course, the strength of the bend is also increased).

The reinforcing stay 113 is an angled steel pipe, and a front opening bracket 114 is attached to the front end portion of the front opening portion. On the other hand, on the left and right sides of the reinforcing frame 37, a support bracket 115 having a substantially L shape in plan view is welded, and the front auxiliary bracket 114 and the support bracket 115 are supported by a plurality of screws 116 and nuts 117. And tighten it.

Further, at the rear end of the reinforcing stay 113, a rear auxiliary bracket 118 which is a fan-shaped rear side is welded, and the rear auxiliary bracket 118 is fixed to the side surface of the front portion of the rear axle housing 34 by a screw 119. A support base 120 to which a screw 119 is screwed is provided on a front side surface of the rear axle housing 34. The support base 120 is formed in a pair of front and rear sides. When higher strength is required, the auxiliary bracket 118 may be fastened rearward as shown by a chain line and fastened to the four support bases 120.

(9) Other embodiments

In the embodiment shown in Fig. 20, in the support mechanism of the engine 26, the frame reinforcing body 56 is made of sheet metal, and the frame reinforcing body 56 is provided with a plurality of through holes 56a that are vertically opened. Since the planar reinforcing body 56 has a large flat area in the present embodiment, the rigidity against twisting can be improved, and the protective function of the engine 26 can be improved. Moreover, due to the presence of the through hole 56a, weight reduction can be achieved and the ventilation function can be ensured.

Further, in the embodiment of Fig. 20, a bumper 122 having a U-shaped rearward opening in plan view is disposed in the vicinity of the front side support frame 55. The bumper 122 is inclined when viewed from the side as the height is higher, and the left and right rear ends are welded to the front side support frame 55, and the front end of the bumper 122 is coupled to the front bracket 123. Front frame 12.

The conventional bumper is only in the form of a horizontal length and is only fixed to the front frame. That is, the conventional bumper only has the protective function of the front end of the traveling body, and does not have other functions.

On the other hand, in the present embodiment, since the bumper 123, the front frame 12, and the front support frame 55 are coupled to each other, the rigidity of the front portion of the chassis can be significantly increased. That is, the bumper 123 has a reinforcing function of the chassis (traveling vehicle body).

Further, since the bumper 122 is fixed to the support frame 55 on the front side, it also functions as a protective member of the engine 26. Therefore, the engine 26 can be configured to be placed under the front side frame 9 to be further lowered. The protection function of the engine 26 is improved (the cooling function of the engine 26 is also high because the ventilation is not blocked). In the present embodiment, as shown in Fig. 20(A), a hydraulic unit 86 is attached to the rear of the upper portion of the transmission case 27.

Fig. 21 is a view showing another example of the overall skeleton. In the present embodiment, two outer and outer frames 124 are disposed on the outer side of the auxiliary frame 23, and the outer frame 124 is supported by a plurality of outer brackets 125. Moreover, the auxiliary cover 126 is supported by the outer frame 124. The lifting pedal 128 is also fixed to the outer outer frame 124. Further, the hood 24 is a shoulder portion 24b whose rear portion is raised, but a fence (safety barrier) 127 is disposed around the step portion 24b. The left and right fences 127 are fixed to the outer outer frame 124.

The outer frame 124 is disposed in a state of being largely extended to the left and right outer sides of the side frames 9, 10. Therefore, a pair of left and right support bars 128 extending from the lower link body 36 to the left and right outer sides are provided, and the bracket 125 outside the rear end is supported by the support bars 128. Thereby, the robustness of the manned portion can be significantly improved. Further, the support rod 128 is coupled to a bracket fixed to the lower link body 36.

In the embodiment shown in Fig. 22, the engine 26 is disposed behind the transmission 27. In the present embodiment, the transmission case 27 and the rear axle housing 34 are connected by the lower connecting body 36 in the same manner as the conventional embodiment, and include the front reinforcing body 37 and the rear reinforcing body 37'. The rear reinforcing body 37' is fixed to the horizontal long frame 130 coupled to the left and right rear side frames 10. The reinforcing bodies 37 and 37' are attached to the lower connecting body 36 via brackets, but may be directly attached by welding or screwing.

The bottom plate 131 is attached to the reinforcing bodies 37 and 37' before and after, and the engine 26 is supported by the bottom plate 131 via a vibration-proof rubber (not shown). The front and rear reinforcing bodies 37, 37' are in the form of a U-shape under the front view. In the present embodiment, the fuel tank can be disposed in the immediate vicinity of the transmission case 27.

The front and rear reinforcing bodies 37, 37' may be formed to have a substantially L shape which is formed under the front view of the horizontal portion below the longitudinal portion, and the front end of the lower horizontal portion is fixed to the side of the lower joined body 36. Further, the horizontal portion below the reinforcing members 37, 37' which are formed in a U-shape under the front view may be fixed to the lower surface of the lower connecting body 36. The front reinforcing body 37 may also be fixed to the outer side portion of the rear side frame 10 in the intermediate frame 11.

(10) Other

The present invention can be embodied in various forms in addition to the above embodiments. For example, the applicable object is not limited to the passenger-type rice transplanter, and can also be applied to various farm machines such as seedling transplanters and lawn mowers. It is also possible to replace the insertion portion of the embodiment with another working device or a transporting trolley. The traveling body is not limited to being driven by wheels, and may be driven by a crawler.

The side frame does not need to be divided into different components before and after, or it can be integrated into one. The form of the reinforcing body connected to the intermediate frame and the lower connecting body is not limited, and various forms can be adopted. The lower connecting body may be variously deformed such as a circular control or a plural. In the case where the hydraulic cylinder is connected to the lower connecting body, the transmission case and the intermediate frame or the side frame may be connected by the reinforcing body, and in this case, the same effects as those of the present invention can be exerted.

(industrial availability)

The present invention exerts usefulness in a passenger-type agricultural machine such as a rice transplanter. Therefore, it can be utilized in the industry.

1. . . Driving body

2. . . As an example of a working device

3. . . Linkage device

4. . . Front wheel

5. . . rear wheel

6. . . Agent

7. . . Steering the steering wheel

8. . . Preparing seedlings

9. . . Front side frame

10. . . Rear side frame

11. . . Intermediate frame

12. . . Front frame

13. . . Rear frame

14. . . Rear pillar

15. . . Outrigger

17. . . Rear transverse struts

18. . . Hanger bracket

18a. . . Bracket plate

19. . . Gantry

20. . . Seat support unit

twenty one. . . Fuel tank

21a. . . Downward projection

twenty three. . . Auxiliary frame

twenty four. . . Hood

24a. . . Operating the pedal

24b. . . Step difference

25. . . Steering wheel column

26. . . engine

27. . . Gearbox

28. . . HST

29. . . Conveyor belt

30. . . Tension pulley

31. . . Rotary arm

32. . . Power steering unit

33. . . Front axle unit

34. . . Rear axle box

34a. . . Backward extension

35. . . Beam member

36. . . Lower link

36a. . . Convex fitting

37. . . Reinforcement frame

37'. . . Rear reinforcement

37a. . . Reinforcement frame 37 at the bottom

38. . . As an example of the support portion of the rear side member support portion

38a. . . Down

39. . . Hydraulic cylinder

39a. . . Cylinder

39b. . . Piston rod

40. . . bracket

41. . . Rear wheel drive shaft

42. . . Working power shaft

43. . . Plant spacing adjustment device

44. . . Mechanical body

45. . . heat sink

48. . . Output shaft

49. . . flywheel

50. . . Output pulley

51. . . silencer

52. . . Pole

53. . . Cover

54. . . Circular plate

55. . . a support frame constituting an engine support portion as an example of a front side member support portion

56. . . Frame reinforcement forming the engine support

56a. . . Through hole

57. . . Side bracket

59. . . Lower bracket

60. . . Upper bracket

60a. . . Support piece

61, 66, 74', 75', 116, 119. . . Screw

62. . . Vibration absorbing unit

63. . . On board

63a, 64a. . . Side panel

64. . . Lower plate

65. . . Cushioning material

67, 117. . . Nut

68. . . Round hole

69. . . Slot

70. . . Rear bracket

71, 78. . . pin

72. . . cooling fan

74. . . Front support board

75. . . Rear support board

77, 115. . . Support bracket

79. . . Rubber seat

80. . . Export

81, 82. . . Flange

83. . . Box bracket

84. . . gas station

85. . . Step difference

86. . . Oil pressure unit

88. . . Upper link

89. . . Lower link

90. . . First pin

91. . . Second pin

92. . . Connector

93. . . Upper bearing tube

94. . . Upper shaft

95. . . Third pin

96. . . Lower bearing tube

97. . . Lower shaft

98. . . 4th pin

99‧‧‧Intermediate link

100‧‧‧5th pin

101‧‧‧6th pin

102‧‧‧ Arm

104‧‧‧7th pin

105‧‧‧ hook

106‧‧‧Accumulator accumulator

107‧‧‧ recess

113‧‧‧ reinforcing poles

114‧‧‧Front auxiliary bracket

118‧‧‧ Rear auxiliary bracket

120‧‧‧ support

122‧‧‧ bumper

123‧‧‧ front bracket

124‧‧‧Outer

125‧‧‧Outer bracket

126‧‧‧Auxiliary cover

127‧‧‧ fence

128‧‧‧ Lifting pedal (support rod)

130‧‧‧cross frame

131‧‧‧floor

C‧‧‧ directions

Fig. 1 is a view showing an embodiment of the present invention, and is a side view of the rice transplanter in a state in which the hood has been removed.

Fig. 2(A) is a plan view of the entire rice transplanter, and Fig. 2(B) is a perspective view of the vehicle body viewed from the lateral direction.

3(A) and (B) are perspective views showing the skeleton of the traveling vehicle body.

Figure 4 is a partially separated perspective view of the traveling vehicle body.

Fig. 5(A) is a perspective view of the traveling body of the separated engine, and (B) is a schematic side view of the main part.

Fig. 6 is a perspective view showing the separation of the support structure of the engine.

Fig. 7 is a perspective view showing the support structure of the engine, (A) is a separate perspective view of the engine and the support member, (B) is a separate perspective view of the support unit, and (C) is a perspective view of the buffer unit.

Fig. 8(A) is a side view of the front portion of the traveling vehicle body, and (B) is a partial front view of the traveling vehicle body.

Fig. 9(A) is a partial plan view of the front portion of the traveling vehicle body.

Fig. 10 is a plan view showing a modification of the state in which a part of the members have been omitted.

Fig. 11(A) is a perspective view showing a main part of the separation, (B) is a perspective view showing a state in which the lower connecting body and the transmission case are connected, and (C) is a perspective view showing a state in which the lower connecting body and the rear axle box are connected.

Fig. 12(A) is a perspective view showing a main portion, and Fig. 12(B) is a perspective view showing the mounting structure of the fuel tank as viewed from below.

Fig. 13 is a plan view showing a state in which the fuel tank has been laterally displaced.

Figure 14 is a bottom plan view of the main part.

Figure 15 is a partial side elevational view of the main portion.

Fig. 16(A) is a perspective view showing a main part of the state in which the fuel tank is turned over, and Fig. 16(B) is a view showing a main portion viewed obliquely from the rear.

Fig. 17 is a partially broken side view showing the connection structure of the link device.

Fig. 18 is a perspective view showing the connection structure of the link device.

Fig. 19 is a view showing a modification, (A) is a separation perspective view, (B) is a separation side view, and (C) is a cross-sectional view as seen from C-C of (B).

Fig. 20 is a view showing another embodiment, wherein (A) is a side view and (B) is a perspective view.

Fig. 21 is a perspective view showing the separation of another embodiment.

Fig. 22 is a schematic side view showing another embodiment.

5. . . rear wheel

9. . . Front side frame

10. . . Rear side frame

11. . . Intermediate frame

13. . . Rear frame

14. . . Rear pillar

15. . . Outrigger

17. . . Rear transverse struts

18. . . Hanger bracket

18a. . . Bracket plate

19. . . Gantry

twenty one. . . Fuel tank

twenty three. . . Auxiliary frame

26. . . engine

27. . . Gearbox

28. . . HST

29. . . Conveyor belt

30. . . Tension pulley

31. . . Rotary arm

32. . . Power steering unit

33. . . Front axle unit

34. . . Rear axle box

34a. . . Backward extension

35. . . Beam member

36. . . Lower link

37. . . Reinforcement frame

38. . . As an example of the support portion of the rear side member support portion

39. . . Hydraulic cylinder

39a. . . Cylinder

39b. . . Piston rod

40. . . bracket

41. . . Rear wheel drive shaft

42. . . Working power shaft

44. . . Mechanical body

45. . . heat sink

49. . . flywheel

50. . . Output pulley

51. . . silencer

52. . . Pole

54. . . Circular plate

55. . . a support frame constituting an engine support portion as an example of a front side member support portion

56. . . Frame reinforcement forming the engine support

57. . . Side bracket

60. . . Upper bracket

62. . . Vibration absorbing unit

70. . . Rear bracket

71. . . pin

Claims (2)

A passenger-type agricultural machine comprising: a traveling vehicle body that is operated by a person to ride and an engine mounted on the traveling vehicle body, wherein the traveling vehicle body includes a chassis disposed under the operating seat and a traveling gearbox, wherein the chassis is provided by The frame material is configured to transmit power from the engine to the inside of the traveling gearbox; and the chassis and the gearbox are disposed in a state in which the gearbox is located below the chassis, and the chassis is formed to extend in the forward and backward directions The side frame is connected by a horizontally long frame, and two front and rear support frames are disposed on the front side of the left and right side frames so as to protrude downwardly, and the bottom of the two support frames are connected via a plurality of vibration absorption units The engine is supported in an anti-vibration manner such that the lower side of the engine is sandwiched between the two support frames, and the two support frames are formed to have a vertical portion on the left and right sides and a horizontal portion connected to the lower portion of the lower end thereof. Long U-shaped. The passenger-type agricultural machine of claim 1, wherein the transmission is coupled to the axle device before the front wheel is supported, and the axle housing is rotatably supported behind the transmission. The gearbox and the rear axle box are connected by a lower connecting body located below the upper surface of the gearbox, and the horizontal frame includes: placing the left and right side frames in the middle and rear portions thereof a left and right horizontally long intermediate frame and a left and right horizontally long rear frame connecting the left and right side frames at a rear end portion thereof, wherein the rear frame is supported by the rear axle box through the rear pillar, and the intermediate frame or the left and right sides The frame and the lower link are connected by a reinforcing body Knot.