JP2009161118A - Riding type mobile agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type mobile agricultural machine which is well balanced in weight in the front and rear and left and right directions of a machine body. <P>SOLUTION: The machine body 5 of a riding type tending machine 1 is supported by a pair of left and right front wheels 2, 2 and rear wheels 3, 3, and an engine 12 and a fuel tank 13 are arranged at a middle position of the front wheels 2 and the rear wheels 3. The engine 12 is located at a center in the width direction of the machine body, and the fuel tank 13 is arranged on the right side of the machine body and a muffler 21 is arranged on the left side of the machine body with the engine 12 interposed in between. A driver's seat 15 on which an operator sits is positioned above a front mission case 33 between the front wheels 2, 2, and a battery 16 is arranged on the right side of the machine body, and a hydraulic continuously variable transmission 17 is arranged on the left side of the machine body with a rear mission case 46 interposed in between. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a riding-type mobile agricultural machine such as a riding management machine, and more particularly to a structure for placing heavy objects on a body.

  2. Description of the Related Art Conventionally, a riding type mobile farm machine (small riding work machine) has been devised in which a driving unit is disposed on a machine body supported by a pair of left and right front wheels and a rear wheel and an engine is mounted (see Patent Documents 1 and 2). ).

JP-A-11-310042 Japanese Patent No. 3917230

  The above-mentioned riding-type mobile agricultural machine has an engine between the front and rear wheels and a driver's seat above the mission linked to the engine to improve the weight balance of the aircraft. The muffler is disposed below the engine and at the lower rear of the engine. As a result, the muffler and the fuel tank are close to each other and dangerous, and when the muffler is provided on the side of the engine, it is difficult to maintain a good balance between the left and right sides of the aircraft.

  Therefore, the present invention arranges the engine behind the driver's seat and between the front and rear wheels, arranges the fuel tank in one of the left and right sides of the fuselage across the engine, and arranges the muffler extending from the engine on the other side. An object of the present invention is to provide a riding-type mobile agricultural machine that solves the above-described problems.

According to the first aspect of the present invention, an operating part (6) is arranged on an airframe (5) supported by a pair of left and right front wheels (2, 2) and rear wheels (3, 3), and an engine (12) is mounted. In the riding type mobile agricultural machine (1),
The driver seat (15) of the driver (6) is disposed above the front wheels (2, 2),
An engine (12) is arranged at the center in the front-rear direction of the fuselage behind the driver seat (15) and between the front wheels (2, 2) and the rear wheels (3, 3),
A fuel tank (13) is arranged in one of the left and right width directions of the aircraft across the engine (12), and a muffler (21) extending from the engine (12) is arranged on the other side.
It is in the riding type mobile agricultural machine.

In the invention according to claim 2, the rotation of the engine (12) is transmitted to the mission (33, 46), and the front wheel (2, 2) and the rear wheel (3, 3) are transmitted from the mission (33, 46). Directly transmitted to one side and transmitted to the other of the front wheels (2, 2) and the rear wheels (3, 3) via the transmission shaft (50),
The engine (12) is disposed above the fuel tank (13) and the muffler (21), and the transmission shaft (50) is disposed in a space below the engine (12).
It exists in the riding type mobile agricultural machine of Claim 1.

According to a third aspect of the present invention, the rotation of the engine (12) is transmitted to the rear wheels (3, 3) from a rear mission (46) positioned substantially at the center between the rear wheels (3, 3). , Transmitted to the front wheels (2, 2) via the transmission shaft (50),
A battery (16) is disposed on either side of the left-right width of the aircraft with the rear mission (3, 3) in between, and a hydraulic continuously variable transmission (17) is disposed on the other side.
It exists in the riding type mobile agricultural machine of Claim 1 or 2.

  In addition, although the code | symbol etc. in a parenthesis is for contrast with drawing, it does not have any influence on a claim by this.

  According to the first aspect of the present invention, the heavy engine is disposed at the center position of the body, which is the center in the longitudinal direction and the width direction of the body, and the fuel tank is disposed on one of the left and right sides of the engine. By arranging the muffler, the aircraft can be configured with a good weight balance between the front and rear and the left and right. In addition, since the fuel tank and the muffler are arranged separately on the left and right sides of the engine, the high-temperature muffler is arranged away from the fuel tank and is safe.

  According to the invention of claim 2, the engine is provided above the muffler and the fuel tank, and the transmission shaft is disposed in the space below the engine, whereby the transmission system between the front and rear wheels has a simple configuration, and the shortest The transmission shaft can be arranged in the path.

  According to the invention of claim 3, the right and left balance of the airframe is improved by arranging the battery and the hydraulic continuously variable transmission having substantially the same weight to the left and right across the rear mission at the center in the width direction of the airframe. Can be achieved.

  A passenger management machine according to the present invention will be described below with reference to the drawings.

<Embodiment 1>
As shown in FIGS. 1 and 2, a riding management machine 1 as a riding-type mobile farm machine according to the present embodiment is supported by front wheels 2 and 2 and rear wheels 3 and 3 having substantially the same diameter as a pair of left and right. The vehicle body 5 is provided, and an operation unit 6 covered with a canopy 7 is provided in front of the vehicle body 5. In addition, an elevating link 9 including a parallel link of an upper link 9a and a lower link 9b is provided at the rear of the machine body 5, and the rotary work machine 10 is attached to the hydraulic cylinder 11 via the elevating link 9 so as to be movable up and down. ing.

  The airframe 5 is arranged with heavy objects such as the engine 12 and the fuel tank 13 concentrated between the front wheel 2 and the rear wheel 3 which are center portions in the front-rear direction of the airframe, and at the front of the airframe 5. A driver's seat 15 on which an operator sits is disposed above the provided front wheel 2, and a battery 16 and a hydraulic continuously variable transmission 17 (HST) are disposed above the rear wheel 3 provided at the rear of the machine body 5. It is arranged.

  As shown in FIG. 2, the engine 12 having the heaviest weight is located in the center in the body width direction, and the fuel tank 13 is attached to the body frame 19 via a bracket 20 provided on the right side of the engine 12. The muffler 21 that is attached and extends to the left side from the engine 12 is disposed away from the muffler 21.

  The battery 16 and the hydraulic continuously variable transmission 17 have substantially the same weight, and the hydraulic type is located on the left side of the aircraft with a rear mission case (transmission, rear mission) 46 located in the center of the aircraft width. A continuously variable transmission 17 is disposed, and a battery 16 is disposed on the right side of the machine body. Further, the rotary work machine 10 is disposed behind the rear wheel 3, and together with these, the machine body 5 is configured in a compact and well-balanced weight in the front-rear direction and the left-right direction.

  On the other hand, in addition to the driver seat 15, the driver section 6 described above is provided with a steering handle 22 for steering the aircraft, and a safety bar with a canopy 7 attached to the upper part behind the driver seat 15. 23 and a luggage platform 25 that is freely opened and closed by a hinge 26 is provided. The luggage platform 25 may also be used as the canopy 7. When the passenger management machine is used as a transport vehicle, the luggage platform 25 is a luggage platform on which fertilizers, farm tools, etc. are placed, and in other cases, the canopy is placed. May be used as

  The steering handle 22 is attached to an upper end portion of a steering shaft 29 covered with a steering column 27, and a bevel gear meshing with a bevel gear 31 provided at one end of an intermediate shaft 30 is attached to the lower end portion of the steering shaft 29. 32 is fixed. As shown in FIGS. 3 and 4, the intermediate shaft 30 extends toward the rear of the machine body, and a bevel gear 35 provided at the other end of the front mission case (mission) 33 is connected to the pitman arm 36. Is engaged with a sector gear 37 for rotating the.

  The pitman arm 36 is connected to knuckle arms 40, 40 via left and right tie rods 39, 39. The knuckle arm 40 allows the final case 41 of the front wheel 2 to be connected to a kingpin shaft 42 (see FIG. 5). The front wheel 2 is steered by turning as a center.

  The bevel gears 31, 32, 35 and the sector gear 37 that mesh with each other have different numbers of teeth, and the rotation from the steering handle 22 is decelerated by the meshing of the two gears.

  Next, the structure around the front axle and the rear axle of the riding management machine 1 will be described.

  As shown in FIGS. 3 and 4, the front axle mechanism 43 and the rear axle mechanism 45 include a front axle case 56 and a rear axle case 70 that are integrally attached to the airframe (airframe frame 19), respectively. A front wheel 2 and a rear wheel 3 are attached to lower ends of axle support members 74 and 58 provided so as to hang from the rear axle case 70 so as to be interchangeable inside and outside in the body width direction.

  The front mission case 33 of the front axle mechanism 43 receives the power from the engine 12 input to the rear mission case 46 via the transmission shaft 50. As shown in FIG. The bevel gear 51 of the transmission shaft 50 and the differential 52 are meshed with each other and output to the left and right distribution shafts 53, 53.

  As shown in FIG. 1, the engine 12 is disposed at a position higher than the fuel tank 13 and the muffler 21, and the transmission case 50 passes through the space below the engine 12 from the rear mission case 46 to the front. It is arranged in a straight line with the shortest route to the mission case 33.

  The distribution shaft 53 is covered with a front axle case 56 including a cylindrical portion 33a of the front mission case 33 and a horizontal cylindrical portion 55a of the kingpin case 55 connected to the cylindrical portion 33a. The bevel gear 53a fixed to the end of the distribution shaft 53 and the bevel gear 42a fixed to the upper part of the kingpin shaft 42 are engaged with each other.

  The kingpin shaft 42 is housed in a kingpin case 55 and a final case 41 provided therebelow, and a bevel gear 42b fixed to the lower end of the kingpin shaft 42 is provided on the outer periphery of an axle transmission cylinder (wheel changing part) 59. It meshes with the formed gear 60. The axle transmission cylinder 59 is rotatably supported by a final case 41 via a bearing, and an axle 61 (hereinafter referred to as a front axle) 61 of the front wheel 2 is fitted on the inner periphery thereof.

  As shown in FIG. 5 (a), the front axle 61 is a hexagonal shaft, and a hexagonal hole 62 that fits the front axle 61 is formed in the middle of the inner periphery of the axle transmission cylinder 59. Power is transmitted to the front wheel 2 by fitting the hexagonal front axle 61 and the hexagonal hole 62. Further, the axle transmission cylinder 59 is configured so that the front axle 61 can be inserted from both ends thereof, and a hole 61 a through which the locking pin 63 is inserted is provided at the tip of the front axle 61. A locking pin 63 is fitted into a pin hole (through hole) 59a and a hole 61a formed at both ends of the axle transmission cylinder 59 projecting from both ends in the width direction of the front axle 61, and the front axle 61 is prevented from coming off by the axle transmission cylinder 59. Is fixed.

  Further, a coil spring 65 is interposed between the kingpin case 55 and the final case 41, and a front suspension (suspension device) 66 that cushions an impact from the front wheel 2 is constituted by the coil spring 65 and the like.

  The front suspension 66 is an independent suspension that supports left and right wheels (front wheels 2 and 2) so as to be independently movable up and down, and is an upper part of the front axle mechanism 43 (a front axle case 56 and a kingpin case 55). Is fixed to the body frame 19.

  The kingpin case 55, the kingpin shaft 42, the final case 41, and the front suspension 66 form an axle support member 58 for the front wheel 2. The length M of the axle support member 58 below the front axle case 56 is: The front wheel 2 is longer than the radius L (L <M).

  An oil seal 64 is disposed at the base of the cylindrical portion 33a of the front mission case 33, the inside of the main body of the front mission case 33 is lubricated with lubricating oil, and the subsequent axle transmission portion is lubricated with grease. ing.

  On the other hand, the structure of the rear axle mechanism 45 is substantially the same as that of the front axle mechanism 43. As shown in FIG. 6, in the rear mission case 46, the power from the engine 12 passes through the differential 67 and the right and left distribution shafts. 69, 69. The distribution shafts 69 and 69 are covered with a rear axle case 70 comprising a horizontal cylinder portion 72a of a brake case 71 and a kingpin case 72. The brake case 71 is provided with a multi-plate brake 73 as a side brake.

  A bevel gear 69a fixed to the tip of the distribution shafts 69, 69 meshes with a bevel gear 75a fixed to the upper part of the kingpin shaft 75 in the kingpin case 72, and the kingpin shaft 75 is in a final case below it. 76 are arranged. A coil spring 77 is interposed between the kingpin case 72 and the final case 76, and an independent suspension type rear suspension (suspension device) 79 is constituted by the coil spring 77 and the like. Thus, the upper part of the rear axle mechanism 45 (the rear axle case 70 and the kingpin case 72) is fixed to the body frame 19.

  The kingpin case 72, the kingpin shaft 75, the final case 76, and the rear suspension 79 constitute an axle support member 74 for the rear wheel 3, and the axle support member 74 has a length Y lower than the rear axle case 70. It is configured to be longer than the radius X of the ring 3 (X <Y).

  A bevel gear 75 b that meshes with a gear 82 formed on the outer periphery of an axle transmission cylinder (wheel changing part) 81 is fixed to the lower end of the kingpin shaft 75, and the axle transmission cylinder 81 is bearing to a final case 76. It is supported so that it can rotate freely.

  The axle transmission cylinder 81 has hexagonal holes 85 into which the axle (hereinafter referred to as rear axle) 83 of the rear wheel 3 is fitted on the inner periphery thereof, and both ends projecting from both ends in the width direction of the final case 76. The rear axle 83 can be inserted from the part. The rear axle 83 is inserted into the axle transmission cylinder 81 by inserting the locking pin 63 into the hole 83a formed at the end thereof and the pin holes 81a, 81a formed at both ends of the axle transmission cylinder 81. It is secured and secured.

  An oil seal 86 is provided at the base of the horizontal cylinder portion 72a of the kingpin case 72. The interior of the rear mission case 46 and the brake case 71 is lubricated with lubricating oil, and the subsequent axle transmission portion is lubricated with grease. ing.

  The riding management machine 1 has its axle cases 56 and 70 positioned higher than the front wheels 2 and the rear wheels 3 by the axle support members 58 and 74 described above, and the kingpin shafts 42 and 75 (axle support members 58 and 74). ), The front wheels 2 and the rear wheels 3 can be arranged below the axle cases 56 and 70 on the inner side of the machine body. Further, the front wheel 2 and the rear wheel 3 can be replaced inside or outside the machine body with the kingpin cases 55 and 72 sandwiched between them by a simple operation of inserting and removing the axles 61 and 83 into and from the axle transmission cylinders 59 and 81. FIG. As shown in Fig. 2, when a wide inter-wheel width is required, such as when straddling two narrow rods B and B, the wheels 2 and 3 are arranged on the outside of the fuselage to form a wide tread T. When straddling the ridge A, the wheels 2 and 3 are arranged on the inner side of the machine body to form a narrow tread S, and the treads S and T can be changed according to the state of the field.

  Further, as shown in FIGS. 3 and 4, on both sides of the body frame 19, there are stands 87 and 87 for jacking up the riding management machine 1 when changing the treads S and T of the wheels 2 and 3. The stand 87 is attached so as to be rotatable about a rotation support shaft 94 supported between a pair of plates 89 and 89 fixed to the side rail 19 a of the body frame 19.

  A bracket 90 for attaching a positioning pin 91 for locking the stand 87 is fixed to the plate 89 by a bolt, and the positioning pin 91 is attached so as to be inserted into a fitting hole of the plate 89 by a spring 91a. It is energized. The stand 87 is fixed by coming into contact with the positioning pin 91, is kept in an upright state by coming into contact with the positioning pin 91 in the working state, and does not rotate downward by the positioning pin 91 in the retracted state. Fixed to.

  Next, power transmission of the passenger management machine 1 will be described.

  As shown in FIG. 7, two pulleys 92 a and 92 b are fixed to the output shaft 92 of the engine 12, and are respectively provided on the input shafts 95 and 96 of the hydraulic pump 93 and the hydraulic continuously variable transmission 17. Belts 97 and 99 are wound around the pulleys 95a and 96a via tension clutch pulleys 97a and 99a. The power input to the hydraulic continuously variable transmission 17 is output to the input shaft 100 of the rear mission case 46, and the gear 100a provided on the input shaft 100 meshes with the gear 101a of the intermediate shaft 101. .

  Further, a gear 101 b that meshes with the differential 67 is fixed to the intermediate shaft 101, and power is transmitted to the rear wheels 3 and 3 via the left and right distribution shafts 69 and 69. A gear 101c that meshes with the bevel gear 50a of the transmission shaft 50 that transmits power to the front mission case 33 is fixed.

  On the other hand, the above-described input shaft 95 of the hydraulic pump 93 is provided with a pulley 95b for branching power to the rotary work machine 10, and between the pulley 102a provided on the input shaft of the auxiliary transmission gear case 102. A belt 103 is wound around a tension clutch pulley 103a as a work machine clutch. The work machine PTO shaft 105 extended from the auxiliary transmission gear case 102 outputs power from the engine 12 to the rotary drive shaft 107 in the work machine gear case 106, and the power input to the rotary drive shaft 107 is transmitted to the transmission chain. It is transmitted to a rotary claw (rotary member) 110 through 109. The work machine transmission system 111 including the pulleys 95b and 102a, the belt 103, the auxiliary transmission gear case 102, the work machine PTO shaft 105, and the work machine gear case 106 transmits power through the lower side of the rear axle 45 (see FIG. 1, FIG. 6 and FIG. 7).

  Next, the configuration of the rotary work machine 10 will be described.

  As shown in FIGS. 1 and 2, the rotary work machine 10 is pivotally supported between a tool bar 112 for attaching various members and support plates 113 provided at both ends of the tool bar 112, and in the machine body width direction. The rotary drive shaft 107 extends, and two rotary units 115 and 115 are movable along the rotary drive shaft 107 to the left and right in the body width direction. These rotary units 115 and 115 can be joined and arranged as shown in FIG. 2, and can also be arranged to be separated from the trough groove as shown in FIG. It is configured to be adjustable.

  The rotary units 115 and 115 include a sprocket 116 fitted to the rotary drive shaft 107 formed of a hexagonal shaft and a sprocket 119 fixed to the output shaft 117 to which the rotary claw 110 is attached, rotatably via a bearing. The chain case 120 covers the transmission chain 109 wound between the sprockets 116 and 119, and the rotary cover 121 is attached to the top of the rotary claw 110 so as to be openable and closable by a hinge. A rotary frame 122 extends from the chain case 120 toward the rear of the machine body.

  On the other hand, a pair of U-shaped brackets 123 opposed to each other are attached to the toolbar 112 by fastening bolts 125. By loosening the fastening bolts 125, the tool bar 112 is configured to be movable right and left on the toolbar. ing. Of the pair of U-shaped brackets 123, a stay 127 is attached to the front side of the machine body, and a gauge ring 126 is attached to a cylindrical bracket provided at an end thereof so as to be adjustable up and down.

  A support stay 129 for supporting the rotary unit 115 extends from the rear side of the pair of U-shaped brackets 123, and a cylindrical bracket 129 a provided on the support stay 129 includes a spring 130. The support rod 131 is attached to be adjustable up and down via the. An L-shaped attachment member 132 connected to the rotary frame 122 and the rotary cover 121 is provided at the end of the support rod 131, and the rotary unit 115 is supported by the support mechanism and the rotary drive shaft 107. .

  Further, a holder frame 133 for attaching the lifting link 9 is provided on the central front surface of the tool bar 112, and the holder frame 133 has a ski 135 for processing residual tillage generated between the rotary units 115 when plowing the entire surface. A cylindrical bracket is provided for mounting. The residual tilling treatment ski 135 is fixed to the bracket by a pin, is configured to be adjustable in height, and can be easily detached.

  The front wheels 2, 2 and the rear wheels 3, 3 may be provided with attachment portions on both sides of the lower end portions of the axle support members 58, 74, and these attachment portions may be attached with bolts or the like. 11 may be moved up and down by an electric cylinder, and the rotary work machine 10 stops rotating the rotary pawl 110 when it is raised and drives when it is lowered as the elevator link 9 is raised and lowered. You may comprise.

  Next, the operation of the passenger management machine according to this embodiment will be described.

  When the operator plows the field, the operator loosens the fastening bolt 125 of the U-shaped bracket 123 attached to the tool bar 112 of the rotary work machine 10, and moves the rotary unit 115 along the rotary drive shaft 107 in the body width direction. The two rotary units 115 and 115 are joined and arranged, and a ski 135 for treating the residual tillage between the rotary units 115 and 115 is attached.

  When the rotary work machine 10 is ready, the operator moves the riding management machine 1 to the field, drives the two joined rotary units 115 and 115, and plows the field with the rotary claws 110 and skis 135. Go.

  Further, when carrying out middle tillage or cultivating work, first, the stands 87 stored on both sides of the machine body are put into a working state, and the machine body is lifted by a jack. When the operator lifts the airframe 5 with a jack, the locking pin 63 is pulled out, the wheels 2 and 3 are removed from the axle transmission cylinders 59 and 81, and the inside or outside of the airframe 5 according to the size of the rods A and B in the field. The wheels 2 and 3 are replaced with each other, and the locking pins 63 are inserted and fixed to the wheels 2 and 3 fitted in the axle transmission cylinders 59 and 81.

  When the adjustment of the treads S and T of the wheels 2 and 3 is finished, the tightening bolt 125 of the U-shaped bracket 123 attached to the tool bar 112 of the rotary work machine 10 is loosened, and the two rotary units as in the wheels 2 and 3 are loosened. 115 and 115 are respectively arranged in accordance with the grooves between the ribs.

  When the adjustment work is completed, the operator drives the rotary work machine 10 and travels the machine body 5 along the ridge, and the rotary claw 110 of the rotary work machine 10 digs up and raises the groove between the ridges to perform weeding. Or bring soil to the plant stock.

  By configuring the passenger management machine as described above, the aircraft 5 supported by the front wheels 2 and the rear wheels 3 has the heavy engine 12 disposed in the vicinity of the center (the longitudinal direction and the center in the width direction). The weight balance in the front-rear direction and the left-right direction can be improved by attaching the fuel tank 13 to the right side of the machine body and the muffler 21 on the left side of the machine body with the engine 12 in between. Further, since the high-temperature muffler 21 is disposed away from the fuel tank 13, it is safe.

  Further, the battery 16 is disposed above the rear axle case 70 on the right side of the aircraft with the rear mission case 46 interposed therebetween, and the hydraulic continuously variable transmission 17 is disposed above the rear axle case 70 on the left side of the aircraft, thereby achieving left-right balance of the aircraft. Can be improved.

  Further, by providing the driver seat 15 above the front wheel 2 (front transmission case 33) and attaching the rotary work machine 10 to the rear of the rear wheel 3, the weight balance of the machine body 5 can be improved.

  Further, the transmission shaft 50 can be arranged in the shortest path by arranging the engine 12 higher than the muffler 21 and the fuel tank 13 and arranging the transmission shaft 50 in a space formed below the engine 12. Moreover, the structure of the transmission system is also simple.

  On the other hand, the two rotary units 115 and 115 of the rotary work machine 10 can be moved along the rotary drive shaft 107, and the rotary units 115 and 115 are joined and arranged so that the tilling work is performed on almost the entire surface of the machine body width. Can do. Further, by disposing the rotary units 115 and 115 apart from each other, it is possible to perform partial tillage, middle tillage, and soil cultivation work on the field, and it is possible to perform tillage, middle tillage, and soil cultivation work with one rotary work machine 10. It is not necessary to purchase a work machine dedicated to each work.

  Furthermore, the lengths M and Y of the lower portions of the axle cases 56 and 70 of the wheel support members 58 and 74 are formed to be longer than the radii L and X of the front wheels 2 and the rear wheels 3, and the axle cases (front axle case 56, rear axle) are formed. By providing the case 70) at a position higher than the front wheel 2 and the rear wheel 3, the front wheel 2 and the rear wheel 3 can be replaced on the inside and outside of the machine body, and the tread S, T can be changed.

  The front wheel 2 and the rear wheel 3 are attached to the axle transmission cylinders 59 and 81 by inserting the axles 61 and 83 into the axle transmission cylinders 59 and 81, and are locked to pin holes 59a and 81a provided at both ends of the axle transmission cylinders 59 and 81. The treads S and T can be easily changed in combination with the structure in which the pin 63 is inserted and fixed and the stand 87 for jacking up is provided on the side of the machine body 5.

  Further, by adopting an independent suspension system for the front suspension 66 and the rear suspension 79, the upper portions of the front axle mechanism 43 and the rear axle mechanism 45 are fixed, and the body frame 19 can be configured on the outermost side. Thereby, the airframe 5 can be comprised highly rigid and lightweight.

<Embodiment 2>
FIG. 9 shows a riding management machine as a riding type mobile agricultural machine according to the second embodiment of the present invention. In this embodiment, the passenger management machine 1 according to the first embodiment has a four-wheel steering (4WS) configuration, and the following description will be made on differences from the configuration of the first embodiment.

  As shown in FIG. 9, a pitman arm 136 (hereinafter referred to as a front pitman arm) for steering the front wheels 2 and 2 is formed in an approximately L shape, and the front wheels 2 and 2 are formed on the long side portion 136a. Tie rods 39, 39 connected to the knuckle arms 40, 40 are attached.

  Similarly to the front wheels 2 and 2, the rear wheels 3 and 3 are provided with a rear pitman arm 139 having the same shape as the front pitman arm 136. The L-shaped short side 139b has a final case 76 for the rear wheels 3 and 3. , 76 are attached to tie rods 140, 140 connected to knuckle arms 137, 137 fixedly attached.

  The short side portion 136b of the front pitman arm 136 and the long side portion 139a of the rear pitman arm 139 are connected by a connecting rod 141, and the front pitman arm 136 and the rear pitman arm 139 have the short side portion 136b and The long side portion 139a is arranged in a direction opposite to the body width direction. As a result, the connecting rod 141 is slanted between the short side portion 136b of the front pitman arm 136 and the long side portion 139a of the rear pitman arm 139.

  Therefore, when the front wheels 2 and 2 are steered, the rear wheels 3 and 3 are steered in the opposite direction to the front wheels 2 and 2, and the riding management machine 1 can reduce its turning radius and You can easily enter the next lane without ruining.

  In addition, the passenger management machine 1 changes the treads S and T of the front wheels 2 and the rear wheels 3 by inserting and removing the axles 61 and 83 to and from the axle transmission cylinders 59 and 81 provided at the lower ends of the wheel support members 58 and 74. Therefore, it is not necessary to adjust the steering system and the transmission system when changing the treads S and T, and a simple configuration can be achieved. Even in four-wheel steering, the treads S and T can be changed with simple work. Can do.

<Embodiment 3>
FIG. 10 shows a riding management machine as a riding type mobile farm machine according to Embodiment 3 of the present invention. In this embodiment, transmission to the rotary work machine 10 in the first embodiment is performed by a belt instead of the work machine PTO shaft 105, and parts different from the configuration of the first embodiment will be described below.

  As shown in FIG. 10, between the pulley 95b provided on the input shaft 95 of the hydraulic pump 93 of the work machine transmission system 111 and the pulley 142a provided on the rotating shaft 142 of the lower link 9b of the lifting link 9. The belt 103 is wound around the tension clutch pulley 103a.

  In addition to the pulley 142a, a pulley 142b is provided on the rotating shaft 142. A tension clutch pulley is provided between the pulley 142b and the pulley 145a provided on the input shaft 145 of the work machine case 143. A belt 147 is wound around 146. The power input to the work machine case 143 is output to the rotary drive shaft 107 and output to the rotary claw 110 via the transmission chain 109 (see FIG. 7) housed in the chain case 120.

  The work machine transmission system 111 performs transmission to the rotary work machine 10 by means of the belt 147, and the pulleys 142a and 142b are provided on the rotary shaft 142 of the lower link 9b of the elevating link 9, whereby the rotary work machine 10 The influence of vertical movement on transmission can be minimized.

The side view of the passenger management machine concerning Embodiment 1 of the present invention. The top view of the riding management machine which concerns on Embodiment 1 of this invention. The side view of the body frame of the passenger management machine concerning Embodiment 1 of the present invention. The top view of the body frame of the passenger management machine concerning Embodiment 1 of the present invention. The front view of the front axle of the passenger management machine concerning Embodiment 1 of the present invention. The front view of the rear axle of the passenger management machine concerning Embodiment 1 of the present invention. The transmission system figure of the riding management machine which concerns on Embodiment 1 of this invention. The top view which shows the tilling work state of the riding management machine in FIG. The top view which shows the steering mechanism of the riding management machine which concerns on Embodiment 2 of this invention. The side view which shows the working machine transmission system of the riding management machine concerning Embodiment 3 of this invention.

Explanation of symbols

1 Passenger management machine (passenger-type mobile farm machine)
2 Front wheel 3 Rear wheel 5 Airframe 6 Driving section 10 Rotary work machine 12 Engine 13 Fuel tank 15 Driving seat 16 Battery 17 Hydraulic continuously variable transmission 21 Muffler 33 Front transmission case (mission)
46 Rear Mission Case (Mission, Rear Mission)
50 Transmission shaft

Claims (3)

In the riding-type mobile agricultural machine, in which the driving unit is disposed on the machine body supported by the pair of left and right front wheels and the rear wheel, and the engine is mounted,
The driver's seat of the driver is disposed above the front wheel,
An engine is arranged at the center in the longitudinal direction of the fuselage that is behind the driver seat and between the front and rear wheels,
A fuel tank is arranged in one of the left and right width directions across the engine, and a muffler extending from the engine is arranged on the other side.
A riding-type mobile agricultural machine. Transmitting the rotation of the engine to the mission, directly transmitting from the mission to one of the front wheel and the rear wheel, and transmitting to the other of the front wheel and the rear wheel via a transmission shaft;
The engine is disposed above the fuel tank and the muffler, and the transmission shaft is disposed in a space below the engine.
The riding type mobile agricultural machine according to claim 1. The rotation of the engine is transmitted to the rear wheel from a rear mission located approximately in the center between the rear wheels, and is transmitted to the front wheel via the transmission shaft,
With the rear mission in between, a battery was placed in one of the left and right sides of the fuselage, and a hydraulic continuously variable transmission was placed on the other side.
The riding type mobile agricultural machine according to claim 1 or 2.

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