JP2010213644A - Riding type agricultural working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bring the skeleton of a traveling machine body in a riding type agricultural working machine to have a structure excellent in strengths even though in a simple structure. <P>SOLUTION: The traveling machine body 1 includes right and left side frames 12 extending toward the longitudinal directions, a lateral front frame 13 connecting the right and left side frames 12 in their front parts, and a lateral rear frame 14 connecting the right and left side frames 12 in their rear parts. The rear half parts out of the side frames 12 are inclined parts 12a becoming higher toward the rear, the rear ends of the side frames 12 stick to the rear frame 14, while the rear frames 14 are supported by rear supports 33 from below. The upper ends of the rear supports 33 are solidly fixed to the rear frame 14 by welding. The rear frame 14 protrudes toward lateral outsides of the side frames 12, thus the agricultural working machine is excellent in stability in supporting a fertilizing machine and a person. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a riding type farm working machine such as a riding type rice transplanter.

  The riding type rice transplanter has a traveling machine body supported by front wheels and rear wheels, and a seedling planting device is attached to the rear part of the traveling machine body so that the height can be adjusted. The traveling machine body is provided with a seat and a steering handle and is equipped with an engine, and traveling and work (for example, seedling) are performed by power from the engine. And it is common that the traveling machine body constitutes a framework (chassis) with steel materials such as a steel pipe and a channel material, and generally has left and right side frames extending long in the front-rear direction as main members of the framework, The left and right side frames are connected by a horizontally long member.

  In Patent Document 1, the left and right side frames are bent in a side view so that the height increases as the rear half of the rear part goes rearward, and the front parts of the left and right side frames are connected by a horizontally long front frame and a bumper. On the other hand, the rear ends of the left and right side frames are respectively fixed to the upper side surfaces of the rear struts rising from the rear axle. Further, the left and right rear columns have rear frames integrally connected thereto (therefore, the left and right rear columns and the rear frame are formed by bending one steel material). A bracket is fixed to the upper ends of the left and right rear columns, and the fertilizer application is supported by the bracket.

Japanese Patent No. 3804926

  If the side frame is in a horizontal position over its entire length, the rear column protrudes greatly upward, so that the support strength of the other members by the rear column is reduced, and the rear ends of the left and right side frames are separated by another member. If not connected, there is a problem that the rigidity of the entire frame is lowered. On the other hand, when the rear half of the side frame is inclined as in Patent Document 1, the side frame, the rear frame, and the rear column are connected at a portion that is almost close to each other. Can be obtained.

  However, while Patent Document 1 has the advantages as described above, there is a problem that processing is troublesome because the rear frame and the left and right rear columns are made of one steel material. In addition, a vehicle body cover having a width dimension similar to that of the seedling planting device is arranged at the rear of the traveling machine body so that the driver can carry out seedling work, and a left and right longitudinal fertilizer is arranged. In many cases, these body covers and fertilizers extend to the left and right outer sides of the rear column. However, in Patent Document 1, since the rear column and the rear frame are an integral structure, the rear frame is a left and right rear frame. Therefore, there is a problem that a sturdy support member is required to stably support the vehicle body cover and the fertilizer application device.

  This invention is made | formed in view of such the present condition, and makes it a subject to provide the riding type farm work machine by which the framework structure of the traveling body was improved.

  The present invention has a multifaceted spread. 1st invention (1st structure: invention of Claim 1) comprises a high-order concept, In this 1st invention, the traveling body which is supported by the front wheel and the rear wheel and carries an engine, A working device disposed on the rear side of the traveling machine body, the traveling machine body includes left and right side frames extending in the front-rear direction, and a left and right longitudinal front frame connecting the left and right side frames at a front portion thereof. The left and right side frames are connected to each other at the rear part thereof, and the side frame, the front frame, and the rear frame constitute a rough framework of the traveling machine body.

  In the first aspect of the invention, an appropriate range on the rear end side of the side frame is an inclined portion whose height increases toward the rear, and the rear end of the side frame abuts the rear frame. The rear frame is supported from below by a rear column, and the upper end of the rear column is fixed to the rear frame. The second invention (second configuration: invention of claim 2) is a preferred development of the first invention, and in this second invention, the rear frame projects outwardly from the left and right sides of the side frame. .

  A third invention (third configuration: invention of claim 3) is an expansion of the first invention or the second invention. In this invention, two rear struts are arranged inside the left and right side frames. A link for raising and lowering the work device is rotatably connected to the two rear columns, and a cylinder for rotating the link is connected to the rear frame.

  A fourth invention (fourth configuration: invention of claim 4) is a development of the first to third inventions. In this invention, the engine has a crankshaft located in front and a cylinder bore in a side view. The engine is disposed so as to be positioned substantially below the inclined portion of the side frame in a side view, and a fuel tank is disposed above the engine. A seat is arranged above the door.

  The fifth invention (fifth configuration: the invention of claim 5) is an expansion of the invention of claims 1 to 4, and this invention has a rear axle arranged substantially below the rear frame. The rear axle has a substantially bilaterally symmetric configuration having left and right projecting portions protruding rearward, and the rear wheel is attached to a rear axle projecting laterally from the left and right projecting portions, and the rear axle And the side frame are set to have substantially the same left-right spacing, while the rear support column rises from the inner corner of the base portion of the projecting portion of the rear axle.

  In each invention of the present application, the side frame, the rear frame, and the rear column are formed of separate members, and the side frame, the rear end, and the upper end of the rear column are abutted against the rear frame. Therefore, compared with the structure which bends one member like patent document 1 and comprises a rear frame and a rear support | pillar, the process of a member is easy.

  Further, since the rear frame can be freely set in length without being restricted by the rear column, the rear frame can be freely configured to project to the left and right outer sides of the left and right side frames as in the second invention. Therefore, for example, in the case of a rice transplanter, the vehicle body cover and the fertilizer can be stably supported by the rear frame. Therefore, the structure of a traveling machine having an excellent support function for people and devices is excessively complicated. It can be realized without making it.

  Now, in Patent Document 1, a pair of upper and lower links are connected to the left and right rear columns, a seedling planting device is connected to the tip of the link member, and the link and the rear frame are connected by a hydraulic cylinder. . Accordingly, when the hydraulic cylinder is expanded and contracted, the tank member rotates and the seedling planting device moves up and down. In Patent Document 1, a rear axle is supported by a rear axle that is attached to the rear wheel. When this configuration is adopted, the rear axle having a sturdy structure can be used as a structural member (framework) of the traveling machine body. Contributes to simplification. On the other hand, it can be said that the interval between the left and right rear columns is preferably set regardless of the position of the rear column from the viewpoint of securing the frame rigidity. However, in Patent Document 1, the side frame is fixed to the side surface of the rear column, so the side frame is fixed. There is a problem that the left and right positions of the frame are restricted by the position of the rear column.

  On the other hand, in the present invention, since the side frame is fixed to the rear frame, the left and right positions of the side frame are not restricted by the position of the rear column, and therefore, the design flexibility with respect to the position of the side frame. Is significantly improved. Therefore, it is possible to realize the side frames on the left and right outer sides of the rear support as in the third aspect without any difficulty. In the third invention of the present application, since the distance between the left and right side frames can be increased even when the rear axle is also used as the structural material (framework) of the traveling aircraft as in the fifth invention, The support stability by the side frame can be improved without greatly changing the support mode of the link.

  An engine is mounted on the traveling aircraft. Looking at the mounting position of the engine for the riding type rice transplanter, the front wheel axle is the rear wheel as disclosed in Japanese Patent No. 2600971 and the type arranged in front of the front wheel axle as in Patent Document 1, for example. There is a type arranged at a position between the two axles. In the case of Japanese Patent No. 2600971, the engine is disposed on the body frame, the fuel tank is disposed on the engine, and the seat is disposed on the fuel tank. In order to support the vehicle body cover, a separate spacer member is required to support the vehicle body cover, and the rear column stands upward from the vehicle body frame. The problem of having to occur arises.

  On the other hand, when the fourth invention of the present application is adopted, the engine is disposed substantially below the inclined portion of the side frame, so that the height of the side frame can be made higher than before and the vehicle body cover can be directly supported. This can contribute to the simplification of the structure of the traveling aircraft. In addition, since the engine is tilted backward in a side view, it is possible to prevent the center of gravity from becoming high.As a result, the seat, fuel tank, and engine are arranged so as to overlap each other in order to effectively use the space. It is possible to enlarge the engine as much as possible.

It is a side view of a rice transplanter. It is a top view of a rice transplanter. It is the perspective view which looked at the rice transplanter from the near side. It is a schematic side view of a traveling machine body. It is a perspective view which shows the framework of a traveling machine body. It is a top view of a traveling body. It is a side view of the principal part of a traveling body. It is a partial bottom view of a traveling machine body. It is the partial perspective view which looked at the traveling body from back. It is a perspective view which shows the relationship between a mission case and a rear axle. It is a perspective view which shows the seedling plant raising / lowering link mechanism. It is a separation perspective view showing the relation between a mission case and a front frame.

  Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to a riding type rice transplanter (hereinafter simply referred to as “rice transplanter”). In the following description, the words “front and rear” and “left and right” are used to specify the direction, but these words are based on the direction of the driver seated in the forward direction unless otherwise specified. .

(1). Outline of rice transplanter First, the outline of rice transplanter will be explained. As can be easily understood from FIGS. 1 to 3, the rice transplanter has a traveling machine body 1 and a seedling planting device 2 as main parts, and the traveling machine body 1 is supported by left and right front wheels 3 and rear wheels 4. Yes. The traveling machine body 1 includes a seat 5 with a backrest on which a driver sits and a steering handle 6 disposed in front of the seat. The seat 5 and the steering handle 6 are arranged at the left and right intermediate positions of the traveling machine body 1. The steering handle 6 is provided in a steering mechanism portion 8 covered with a bonnet 7. Further, preliminary seedling stands 9 are provided in front of the seat 5 on both the left and right sides, and a fertilizer application device 10 is provided behind the seat 5.

  For example, as can be understood from FIG. 1 and FIG. 1, the traveling machine body 1 includes left and right side frames 12 that extend in the front-rear direction, a front frame 13 that connects the left and right side frames 12 at the front end portion, and left and right side frames 12. It has a left and right rear frame 14 connected to the rear end. The side frame 12, the front frame 13, and the rear frame 14 constitute a vehicle body frame (chassis) that forms the core of the traveling machine body 1. As shown in FIGS. 4 and 5, a bumper 15 is fixed to the front end of the side frame 12.

  The side frame 12 is bent so that a substantially front half portion is in a substantially horizontal posture and a rear half portion is in a backward inclined posture with a front and rear intermediate portion as a boundary. In other words, the rear half of the side frame 12 is an inclined portion 12a that increases in height toward the rear.

  For example, as can be understood from FIG. 5, the receiving plate 16 is suspended by the front frame 13 and the bumper 15, and the battery 17 is mounted on the receiving plate 16. Although omitted in the drawing, consideration is given so that a balancer (weight) can be arranged on the left and right outer sides of the receiving plate 16.

  For example, as shown in FIG. 5, left and right side frames 12 are fixed to the left and right side frames 12 by outward welding with outwardly projecting outward frame 18 that protrudes outward. The seedling stand 9 is fixed. The bumper 15 is also fixed to the outward branch frame 18 at the front end. Further, auxiliary frames 19 extending in the front-rear direction are arranged in parallel on the left and right sides of the side frame 12, and the auxiliary frame 19 is welded to the outward branch frame 18 and the rear frame 14. Accordingly, the rear frame 14 protrudes outward from the left and right sides of the side frame 12. The rear wheel 4 is located between the side frame 12 and the auxiliary frame 19.

  For example, as can be understood from FIG. 1, the engine 21 is disposed in a portion of the side frame 12 positioned below the inclined portion 12 a in a side view, and the gear 21 is positioned in front of the engine 21 and at a position lower than the side frame 12. A mission case 22 containing a group is arranged. The engine 21 is arranged such that the crankshaft 23 extends in the left-right direction, and power is transmitted to the inside of the transmission case 22 by a pulley and a belt 24. A front axle device 25 is attached to the left and right side surfaces of the front portion of the transmission case 22, and the front wheel 3 is rotatably supported by the front axle device 25. For example, as shown in FIG. 1, the front axle to which the front wheel 3 is attached is indicated by reference numeral 26.

  For example, as can be understood from FIG. 2, the engine 21 is disposed at a position along the longitudinal center line of the traveling aircraft body 1 (that is, disposed at the left and right intermediate portion of the traveling aircraft body 1). For example, as can be understood from FIGS. 1, 4, and 7, the engine 21 is disposed with the crankshaft 23 positioned in front and the cylinder bore tilted backward.

  The seat 5 is positioned substantially at the middle of the left and right sides of the traveling machine body 1 and generally above the front half of the inclined portion 12a of the side frame 12 in a side view. As can be understood from FIGS. 1 and 2, the front part of the engine 21 overlaps with the seat 5 in plan view, and the engine 21 protrudes greatly behind the seat 5 in plan view and side view. To be precise, the engine 21 protrudes behind the seat 5 at a rate of about half of the rear or more.

  A fuel tank 27 is disposed between the seat 5 and the engine 21. The front end of the fuel tank 27 is located slightly behind the front end of the seat 5, while the rear end of the fuel tank 27 is located slightly behind the rear end of the seat 5. The seat 5 can be adjusted to move back and forth. In this case, however, the relative front and back positions of the seat 5 and the fuel tank 27 can naturally be changed.

  A fertilizer application device 10 is disposed behind the seat 5. The fertilizer application device 10 includes the same number of hoppers as the number of planting strips, and the fertilizer in the hoppers is dropped on the field by a hose by the feeding action of the blower. For example, as can be understood from FIG. 4, the fertilizer application device 10 is supported by the rear frame 14. A rear axle case 30 is disposed obliquely behind the engine 21, and the rear wheel 4 is fixed to the rear axle 31 protruding left and right from the rear axle case 30 so as not to be relatively rotatable. Note that an auxiliary wheel may be attached to the rear axle 31 in a field with deep mud.

  The rear axle case 30 and the rear frame 14 are connected by two right and left rear columns 33. The rear column 33 is inclined slightly forward with respect to the vertical line in a side view. For example, as can be understood from FIG. 5 and FIG. 11, a Y-shaped top link 34 in plan view is connected to the rear frame 14 so as to rotate up and down around its front end. A lower link 35 having a parallel member extending in the front-rear direction as a main material is connected so as to rotate around its front end, and a rear link 36 is relatively rotated at the rear end of the top link 34 and the lower link 35. Connected as possible.

  A portion of the traveling machine body 1 on which a person is placed is covered with an integrally structured body cover (body cover). For example, as shown in FIG. 5, the left and right side frames 12 are connected by an intermediate frame 38 at a lower portion of the steering handle 6, and the left and right side frames 12 are behind the intermediate frame 38 from the seat 5. Also, an inward branch frame 39 protruding inward at the front position is fixed. The floor portion of the vehicle body cover 37 is supported by the side frame 12, the intermediate frame 38, the inward branch frame 39, the outward branch frame 18, and the like.

  For example, as can be understood from FIG. 1, the seedling planting device 2 is attached to the rear link 36. The rear link 36 has a front and rear longitudinal main member and a left and right longitudinal coupling rod 40, and a hydraulic cylinder 41 is coupled to the coupling rod 40 and the rear frame 14 so as to be relatively rotatable. Accordingly, when the hydraulic cylinder 41 is expanded and contracted, the seedling planting device 2 moves up and down.

  As can be understood from FIGS. 1 and 2, the seedling planting device 2 includes four rotary planting devices 42, a seedling mounting platform 43 having four belts, a float 44, a leveling rotor 45, and the like. . The present embodiment is a four-row planter having four planting devices, and two planting devices 42 are in one set as in the conventional one. Since the structure of the seedling planting device 2 is not directly related to the present invention, a detailed description of the seedling planting device 2 is omitted.

  Although it is considered that the general configuration of the present invention can be understood from the above description, the details of the traveling machine body 1 will be further described.

(2). Framework of the vehicle (substantially upper part)
First, the framework of the traveling machine body 1 will be described. As described above, in the present embodiment, the left and right side frames 12, the front frame 13, and the rear frame 14 constitute a main body frame. Further, both the transmission case 22 and the rear axle case 30 include the traveling vehicle body 1. It also functions as a structural member constituting the framework.

  That is, as described above, the rear axle case 30 is connected to the rear frame 14 via the rear column 33. For example, as shown in FIG. 8, the transmission case 22 and the rear axle case 30 are connected to the joint member 47. Further, for example, as shown in FIG. 16, the transmission case 22 is connected to the front frame 13 via upper and lower front brackets 48 and 49.

  As described above, the present embodiment is characterized in that the transmission case 22 and the rear axle case 30 are used as a framework member of the traveling machine body 1. More specifically, the mission case 22 and the rear axle case 30 have a sturdy structure due to the function of rotatably supporting a large number of gears, and the mission case 22 and the rear axle case 30 having such a sturdy structure. Is also used as a frame member. Therefore, high support strength can be ensured with a simple structure.

  Furthermore, the framework of the traveling machine body 1 will be described in detail. First, the side frame 12 will be described. The side frame 12 is made of a steel pipe having a square cross section, and as described above, the latter half is an inclined portion 12a. The inclination angle of the inclined portion 12 a is substantially the same as the inclination angle of the engine 21, and the engine 21 is positioned substantially below the inclined portion 12 a of the side frame 12 in a side view.

  The load of the seedling planting device 2 acts as a tensile load on the hydraulic cylinder 41 with the links 35 and 36 as fulcrums. Since the hydraulic cylinder 41 is connected to the rear frame 14, the tensile load applied to the hydraulic cylinder 41 acts to press the rear frame 14 against the rear support 33 from above. That is, a part of the load of the seedling planting device 2 acts as an axial compressive load on the rear column 33. Therefore, the rear column 33 has a high support function without being excessively sturdy. Particularly, when the rear column 33 is inclined forward as in the present embodiment, it is preferable because the ratio of the load of the seedling planting device 2 acting as a downward compressive load on the rear column 33 can be increased.

  The cross-sectional shape of the rear frame 12 is a rectangular shape that is long in the vertical direction, which is to increase the rigidity against the downward load. The rear frame 14 employs a round pipe, which is mainly for the ease of attachment of the side frame 12 and the rear column 33 (to eliminate the direction of butting). Of course, it is possible to adopt other cross-sectional shapes for the side frame 12 and the rear frame 14.

  For example, as can be understood from FIG. 5, the rear end of the auxiliary frame 19 is fixed to a longitudinal longitudinal end stay 50 fixed to the rear frame 14. Further, the auxiliary frame 19 has a front posture and a rear portion in a horizontal posture and has an upward U-shaped stepped portion 19a recessed downwardly between the two, and as shown in FIG. An elevating tread 51 is provided at the lower end of the drop portion 19a.

  As shown in FIG. 5, the portion of the left and right side frames 12 near the tip of the inclined portion 12 a is connected by a portal-shaped center frame 52 having an upper horizontal portion and left and right foot portions. The left and right intermediate stays 53 extending rearward are fixed to the upper end of the center frame 52, and the seat 5 is attached to the intermediate stay 53. The seat 5 can be tilted forward, and when the seat 5 is tilted forward, the inlet of the fuel tank 27 appears.

  Between the center frame 52 and the rear frame 14, a rear support bar 55 having a left and right longitudinally upward opening groove shape is disposed, and an intermediate stay 53 is overlapped with the rear support bar 55 from above, and both are welded. . The left and right ends of the rear support bar 55 are also welded to the auxiliary frame 19. Further, the rear support bar 55 is supported by the inclined portion 12a of the side frame 12 via the intermediate foot material 56 shown in FIG. The shoulder of the vehicle body cover 37 is supported by the rear support bar 55, the rear frame 14, and the auxiliary frame 19.

(3). Framework of the traveling aircraft (substantially lower part)
For example, as clearly shown in FIG. 8, the mission case 22 has a shape that is long in the front-rear direction, and roughly has a structure in which two main members on the left and right are stacked and fastened together with a bolt group. The front portion of the mission case 22 is provided with a convex portion 22b that protrudes left and right, and a front axle 25 is attached to the convex portion 22b. An HST (hydrostatic hydraulic continuous transmission) 58 is attached to the left side surface of the rear portion of the transmission case 22, and power from the engine 21 is transmitted to the input shaft of the HST 58 by the belt 24 described above. The trunnion (control member) 59 of the HST 58 moves in conjunction with the movement of the accelerator pedal 60 shown in FIGS.

  For example, as shown in FIG. 10, the joint member 47 uses a round pipe, and a first bracket 61 having a substantially U-shape in plan view is welded to the front end of the joint member 47. It is fixed with a bolt at the rear end. Accordingly, a receiving portion into which the first bracket 61 is fitted is formed at the rear end of the mission case 22. Similarly, as shown in FIG. 10, a flat plate-like second bracket 62 is welded to the rear end of the joint member 47, while the rear axle case 30 is formed with a square boss portion 30c on which the second bracket 62 overlaps. The second bracket 62 is fixed to the square boss 30c with bolts.

  As clearly shown in FIG. 9, the left and right end portions of the rear axle case 30 are projecting portions 30a projecting rearward, and the rear axle 31 projects outward from the left and right projecting portions 30a. For example, as clearly shown in FIG. 8, the travel drive shaft 64 extends rearward from the front left convex portion 22 a of the transmission case 22, and the driving power of the rear wheels 4 is transmitted to the rear axle case 30 via the travel drive shaft 64. Is being transmitted to the inside.

  For example, as can be easily understood from FIG. 7, the distance between the left and right side frames 12 is set to approximately the same size as the left and right length of the rear axle case 30. On the other hand, as shown in FIG. 5, for example, the left and right distance between the rear columns 33 is smaller than the distance between the left and right side frames 12. Then, as clearly shown in FIG. 9, a step 30b is formed at the base portion of the rearward projecting portion 30a of the rear axle case 30, and the rear column 33 is fixed to the rear bracket 65 fastened to the step 30b with a bolt. Has been. As shown in FIG. 9, a cylinder bracket 66 that connects the hydraulic cylinder 41 (see FIG. 1) is welded to the rear frame 14.

  Next, a connection structure between the mission case 22 and the front frame 13 will be described. As shown in FIG. 12, an upper front bracket 48 extending rearward is welded to the rear surface of the front frame 13, and an intermediate front bracket 49 and a lower front bracket 68 are disposed below the upper front bracket 48. . Then, the upper front bracket 48 and the intermediate front bracket 49 are fixed, the lower part of the power steering 67 is fixed to the intermediate front bracket 49 and the lower front bracket 68, and the intermediate front bracket 49 and the lower front bracket 68 are further fixed. The rear end is fastened to the front end of the mission case 22 with a bolt. The intermediate front bracket 49 and the lower front bracket 68 are configured to sandwich the front end portion of the mission case 22 from both the left and right sides.

(3). Outline of engine and power system As described above, the engine 21 is disposed in an inclined posture in a side view. For example, as shown in FIG. 7, the crankshaft 23 of the engine 21 is slightly more than the input shaft 77 of the HST 58. Located at a high height. The engine 21 is supported by the joint member 47 and the rear axle 30. That is, first, as shown in FIG. 10, rear receiving plates 79 are fastened to the left and right sides of the square boss portion 30c of the rear axle case 30, and the rear rear receiving portions 79 are connected to the rear via vibration-proof rubbers 80. A support plate 81 is supported. The main body (crankcase) of the engine 21 is fastened to the rear support plate 81 with bolts.

  As can be understood from FIG. 10, the front bracket 83 made of a plate material is welded to the first bracket 61 of the joint member 47 in the left and right longitudinal direction. A left and right front support plate is supported via 80, and the front portion of the engine body is fastened to the front support plate with bolts. As shown in FIG. 11, a leveling drive shaft 88 for driving the leveling rotor 45 displayed in FIG. 1 protrudes from the lower end portion of the rear axle case 30. Needless to say, the leveling drive shaft 88 and the leveling rotor 45 are connected by a universal joint.

  For example, as shown in FIGS. 8 and 10, a hydraulic pump 89 for driving the lifting hydraulic cylinder 41 and the power steering 69 is disposed on the right side surface of the transmission case 22 opposite to the HST 58. Further, as shown in FIG. 8, an inter-stock adjustment device 90 is disposed at the front and right side portion of the rear axle case 30, and as shown in FIG. 9, the inter-plant adjustment device 90 receives a planting shaft (PTO shaft). ) 91 protrudes backward and the fertilizer application drive shaft 92 protrudes upward.

  A part of the lower surface of the fuel tank 27 near the front end is substantially horizontal, and most of the rear side thereof is inclined rearward in a side view. The inclination angle of the lower surface of the fuel tank 12 is substantially the same as the inclination angle of the inclined portion 12 a in the side frame 12 and the inclination angle of the engine 21. The upper surface of the fuel tank 27 is basically horizontal, and the upper front corner where the upper surface and the front surface are continuous is cut into a chamfered shape when viewed from the side.

(4) Summary As described above, the rice transplanter of the present embodiment has the configuration of the present invention such that the engine 21 is arranged in an inclined posture and the rear portion of the side frame 12 is an inclined portion 12a. It has been materialized. As a result, the various effects described in the column of the effect of the invention are exhibited. Further, as mentioned in the above description, the present embodiment has many improvements not found in the past. This point will be further described.

  As described above, the present invention can be embodied in a riding agricultural machine such as a rice transplanter and has high utility. Therefore, it has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Traveling body 2 Seedling planting device 3 Front wheel 4 Rear wheel 5 Seat 6 Steering handle 10 Fertilizer 12 Side frame 13 Front frame 14 Rear frame 19 Auxiliary frame 21 Engine (gasoline engine)
22 Transmission case with built-in transmission 23 Crankshaft 24 Belt 27 Fuel tank 33 Rear support 37 Car body cover 47 Joint member 48, 49 Front bracket 58 HST

Claims (5)

The vehicle has a traveling machine body supported by front wheels and rear wheels and mounted with an engine, and a working device disposed on the rear side of the traveling machine body. The traveling machine body includes left and right side frames extending in the front-rear direction. And a left and right longitudinal front frame that connects the left and right side frames at the front portion thereof, and a left and right longitudinal rear frame that connects the left and right side frames at the rear portion thereof, and the side frame, the front frame, and the rear frame It is the structure that the rough framework of the traveling machine body is composed with the frame,
An appropriate range on the rear end side of the side frame is an inclined portion whose height increases toward the rear, the rear end of the side frame abuts the rear frame, and the rear frame is It is supported from below by the rear column, and the upper end of the rear column is fixed to the rear frame.
Ride-type agricultural machine. The rear frame projects to the left and right outside of the side frame,
The riding type agricultural working machine according to claim 1. Two rear struts are arranged inside the left and right side frames, and a link for raising and lowering the working device is rotatably connected to the two rear struts, and the link is rotated to the rear frame. Cylinders for operation are connected,
The riding type agricultural working machine according to claim 1 or 2. The engine has a crankshaft positioned in front and a cylinder bore inclined in a side view, and the engine is arranged so as to be positioned substantially below an inclined portion in the side frame in a side view. The fuel tank is disposed above the engine, and the seat is disposed above the fuel tank.
The riding type agricultural working machine according to any one of claims 1 to 3. The rear axle is disposed substantially below the rear frame, and the rear axle has a substantially laterally symmetrical shape having left and right projecting portions projecting rearward and projecting laterally from the left and right projecting portions. The rear wheel is attached to the rear axle, and the rear axle and the side frame are set to have substantially the same left-right distance, while the rear support column rises from the inner corner of the base portion of the protruding portion of the rear axle. Yes,
The riding type agricultural working machine according to any one of claims 1 to 4.

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