JP2010058705A - Riding type mobile agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type mobile agricultural machine capable of easily adjusting a tread. <P>SOLUTION: A front wheel 2 and a rear wheel are mounted to a lower part of a wheel support member 58 hung from a front axle case 56 and a rear axle case integrally mounted to a machine body, and a length M of the wheel support member 58 is made longer than a radius L of the front wheel 2 or the rear wheel. Also, the front wheel 2 and the rear wheel are constituted separate from an axle 61. The axle 61 is selectively projected inward or outward of the machine body across the wheel support member 58 corresponding to a size of a ridge in a field, and the wheel is mounted to a projecting end, so as to easily adjust treads S, T of the machine body. <P>COPYRIGHT: (C)2010,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 mounting structure of a wheel that supports a machine body.

  Conventionally, a work machine (cultivation unit) is attached to the rear of the machine body supported by a pair of left and right front wheels and rear wheels via a lifting link (lifting mechanism), and operations such as tillage, middle tillage, and soil cultivation are performed by the work machine. A riding type mobile agricultural machine (small riding work machine) has been devised (see Patent Document 1 and Patent Document 2).

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

  The riding-type management machine performs operations such as plowing and cultivating while straddling a plow or a field fence. However, the size of the field fence varies, and the tread like the riding type mobile farm machine described in Patent Documents 1 and 2 above. If the size of the bag does not fit the tread of the aircraft, the above work could not be performed.

  Moreover, since the tread may be changed during the work, it has been desired that the tread width can be easily changed with a simple structure.

  Therefore, the present invention is configured such that the axle is slidable to the left and right, and selectively protrudes inward or outward of the fuselage with the wheel support member interposed therebetween, and a front wheel and a rear wheel are attached to the protruding ends to change the tread. An object of the present invention is to provide a riding-type mobile agricultural machine that can solve the above-mentioned problems by enabling the above.

The invention according to claim 1 is a riding type mobile agricultural machine (1), in which a driving unit (6) is arranged on a machine body (5) supported by a pair of left and right front wheels (2) and a rear wheel (3). ,
A wheel support member (58, 74) longer than the radii (L, X) of the front wheel (2) and the rear wheel (3) is provided on the airframe (5) so as to hang down. 74) has an axle insertion portion (59, 81) for inserting each axle (61, 83) of the front wheel (2) and the rear wheel (3) at the lower end thereof,
The axle (61, 83) is a position projecting inward from the axle fitting part (59, 81) made of a cylindrical member formed over the entire length of the wheel support member (58, 74) in the fuselage width direction. And slidable to a position protruding to the outside of the fuselage,
These axles (61, 83) are selectively protruded inside or outside the body with the wheel support members (58, 74) in between, and the front wheels (2) and rear wheels (3) are mounted on the protruding ends. To change the tread (S, T),
It exists in the riding type mobile agricultural machine (1) characterized by this.

  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 front wheels, the rear wheels, and the axles are formed separately, the axles of the front wheels and the rear wheels are slid, and the wheels are selectively placed inside or outside the body with the wheel support member interposed therebetween. By projecting and attaching the front and rear wheels to the projecting ends, it is possible to change the tread according to the size of the field basket with a simple operation and configuration. In addition, by configuring the front and rear wheels and the axle separately, the parts can be shared, the manufacturing cost can be kept low, and the axle slides to the left and right. When mounting the rear wheel, a minimum space is required, and the space below the fuselage can be used effectively.

  A passenger management machine according to the present invention will be described below with reference to the drawings. 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 working 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 continuously variable transmission is located on the left side of the aircraft with a rear mission case (rear mission) 46 located in the center of the aircraft width. A transmission 17 is arranged, and a battery 16 is arranged 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 rotates the pitman arm 36 in the front mission case 33. Is engaged with the sector gear 37 to be engaged.

  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, which is the main part of the present invention, 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. The front wheel 2 and the rear wheel 3 are attached to lower ends of wheel support members 58 and 74 provided so as to hang from the rear axle case 70.

  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 and the differential 52 of the transmission shaft 50 are meshed with each other and output to the left and right distribution shafts 53 and 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 shaft 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 king pin shaft 42 is housed in a king pin case 55 and a final case 41 provided therebelow, and a bevel gear 42b fixed to the lower end portion of the king pin shaft 42 is provided on the outer periphery of an axle transmission cylinder (axle fitting insertion portion) 59. It meshes with the formed gear 60. The axle transmission cylinder 59 is a cylindrical member that penetrates in the machine body width direction at the lower end of the final case 41 and is rotatably supported via a bearing, and the axle 61 of the front wheel 2 (hereinafter referred to as the front axle) on the inner periphery thereof. ) Is inserted to form an axle insertion portion.

  As shown in FIGS. 5A and 5B, the axle 61 is a hexagonal shaft whose outer periphery is hexagonal, and is slidable in the width direction on the inner periphery of the axle transmission tube 59. A hexagonal hole 62 is formed in the middle portion of the inner periphery of the transmission cylinder 59 to engage the front axle 61 and transmit power.

  Further, through holes 61 a and 61 b for inserting the locking pins 63 are provided at both ends of the front axle 61, and pin holes are also provided at both ends of the axle transmission cylinder 59 protruding from both ends in the width direction of the final case 41. 59a and 59b are formed, and the front axle 61 is fixed and secured by inserting a locking pin 63 into the through holes 61a and 61b and the pin holes 59a and 59b.

  The front axle 61 is formed longer than the entire length of the axle transmission cylinder 59. When the through holes 61a and 61b at one end are prevented from being removed by the locking pin 63, the other end protrudes from the axle transmission cylinder 59. By selecting which through-holes 61a and 61b are to be locked by the locking pin 63, a position that protrudes toward the inner side of the aircraft with the final case 41 interposed therebetween (a position indicated by an imaginary line in FIG. 5) and an outer side that protrudes from the aircraft. It is configured to be switchable to a position (a solid line position in FIG. 5).

  A boss portion 2a of the front wheel 2 formed separately from the front axle 61 is fitted into the projecting end (the other end) of the front axle 61 projecting inward or outward of the machine body. Similar to the tube 59, the inner periphery is hexagonal and the pin hole 2b is formed on the outer periphery. The front wheel 2 is integrally fixed to the front axle 61 by inserting a locking pin 64 into the pin hole 2b of the boss portion 2a and the through holes 61b and 61a at the protruding end of the front axle 61.

  Further, a coil spring 65 is interposed between the kingpin case 55 and the final case 41 described above, 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. Yes.

  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 the wheel support member 58 of the front wheel 2. The length M of the lower portion of the wheel support member 58 from the front axle case 56 is The front wheel 2 is longer than the radius L (L <M).

  An oil seal 68 is disposed at the base of the cylindrical portion 33a of the front mission case 33, the inside 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 a wheel support member 74 of the rear wheel 3, and the wheel support member 74 has a length Y lower than the rear axle case 70. The rear wheel 3 is longer than the radius X (X <Y).

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

  The axle transmission cylinder 81 has a hexagonal hole 85 into which an axle 83 of the rear wheel 3 (hereinafter referred to as a rear axle) is fitted in a middle portion of the inner periphery thereof, and protrudes from both ends in the width direction of the final case 76. The rear axle 83 can be inserted from both ends of the shaft, and pin holes 81a and 81b through which the locking pins are inserted and penetrated in both ends of the axle transmission cylinder 81 and both ends of the rear axle 83, respectively. Holes 83a and 83b are formed.

  The rear axle 83 is fixed and secured by inserting the locking pin 63 through the through holes 83a and 83b and the pin holes 81a and 81b, and the entire length thereof is longer than the entire length of the axle transmission cylinder 81. When the through holes 83a and 83b at one end are prevented from being removed by the locking pin 63, the other end protrudes from the axle transmission cylinder 81, and therefore, which of the through holes 83a and 83b is to be locked by the locking pin 63 is selected. By doing so, it is configured to be switchable between a position projecting inside the fuselage (position of an imaginary line in FIG. 6) and a position projecting outside the fuselage (position of a solid line in FIG. 6) across the final case 76. .

  Further, a boss portion 3a of the rear wheel 3 formed separately from the rear axle 83 is fitted into the projecting end (the other end) of the rear axle 83 projecting inward or outward of the machine body. Similar to the axle transmission cylinder 81, 3a has a hexagonal inner periphery and a pin hole 3b provided on the outer periphery. The rear wheel 3 is fixed to the rear axle 83 by inserting a locking pin 64 into the pin hole 3b and the through holes 83a and 83b at the projecting ends.

  An oil seal 86 is provided at the base of the horizontal cylindrical 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.

  In the riding management machine 1, the axle cases 56 and 70 are provided at positions higher than the front wheels 2 and the rear wheels 3 by the wheel support members 58 and 74 described above, and the kingpin shafts 42 and 75 (wheel support members 58 and 74). The front wheel 2 and the rear wheel 3 can be arranged below the axle cases 56 and 70 on the inner side of the vehicle body.

  Further, since the wheels 2 and 3 and the axles 61 and 83 are configured separately, the wheels 2 and 3 are detached from the axles 61 and 83, and the axles are slid to sandwich the wheel support members 58 and 74 on the opposite side. The front wheel 2 and the rear wheel 3 can be replaced inside or outside the machine body by a simple operation of simply attaching the wheel to the projecting end, and as shown in FIGS. When a wide inter-wheel width is required, such as when straddling two narrow rods B, B, the wheels 2, 3 are arranged outside the fuselage to form a wide tread T, etc. 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 field conditions.

  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.

  Also, a bracket 90 for attaching a positioning pin 91 for locking the stand 87 is fixed to the plate 89 with a bolt, and the positioning pin 91 is inserted into a fitting hole of the plate 89 by a spring 91a. Is being 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.

  Note that the through holes 61a, 61b, 83a, 83b of the axles 61, 83 may be formed not only at both ends but also at other locations in the axial direction. Further, the axles 61 and 83 are not positioned by the locking pins 63 and 64, and the wheels 2 and 3 are not fixed, but are positioned by other locking mechanisms such as bolts and balls, and the wheels 2 and 3 are fixed. It may be fixed. Furthermore, although the same thing is used for the locking pins 63 and 64 in this Embodiment, you may use the thing from which a diameter differs suitably according to the magnitude | sizes of the wheels 2 and 3 etc., etc.

  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 rear axle 47 (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 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 and 2 and the rear wheels 3 and 3 may be provided with attachment portions on both sides of the lower end portions of the wheel support members 58 and 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 machine body 5 with the jack, the operator removes the locking pins 64 and removes the wheels 2 and 3 from the axles 61 and 83. When the wheels 2 and 3 are removed, the operator pulls out the locking pin 63 and slides the axles 61 and 83, and is opposite to the ends of the axles 61 and 83 to which the wheels 2 and 3 have been mounted so far. The end is projected from the axle transmission cylinders 59 and 81.

  Then, the slidable axles 61 and 83 are again prevented from being detached by the locking pins 63, and the boss portions 2 a and 3 a of the wheels 2 and 3 are mounted on the protruding other ends and fixed by the locking pins 64. Thereby, the front wheel 2 and the rear wheel 3 are replaced on the inner side or the outer side of the machine body 5 in accordance with the sizes of the baskets A and B in the field.

  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 reed, and the rotary claw 110 of the rotary work machine 10 digs up and raises the groove between the reeds to perform weeding. Or bring soil to the plant stock.

  By configuring the riding management machine as described above, 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 longer than the radii L and X of the front wheels 2 and the rear wheels 3. By providing each axle case (front axle case 56, rear axle 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 inside and outside the machine body. The treads S and T can be changed according to the heels A and B.

  Further, the axles 61 and 83 and the wheels 2 and 3 are configured separately, and the axles 2 and 3 are selectively projected on the inner side and the outer side of the machine body with the wheel support members 58 and 74 sandwiched therebetween. The treads S and T can be easily changed by attaching the wheels 2 and 3 to the vehicle, and at the time of changing the tread, only a minimum space for arranging the wheels 2 and 3 is required. Space can be used effectively, and the flexibility of layout has expanded. Furthermore, the parts can be shared, and the manufacturing cost can be reduced.

The side view of the riding management machine which concerns on embodiment of this invention. The top view of the passenger management machine concerning the embodiment of the present invention. The side view of the body frame of the riding management machine which concerns on embodiment of this invention. The top view of the body frame of the passenger management machine concerning an embodiment of the present invention. (A) The exploded view of the front wheel which concerns on embodiment of this invention, (b) Sectional drawing of the front axle of the riding management machine which concerns on embodiment of this invention. Sectional drawing of the rear axle of the passenger management machine concerning embodiment of this invention. The transmission system figure of the passenger management machine concerning the embodiment of the present invention. The top view which shows the tilling work state of the riding management machine in FIG.

Explanation of symbols

1 Passenger management machine (passenger-type mobile farm machine)
2 Front wheel 3 Rear wheel 5 Airframe 6 Driving part 58 Wheel support member 59 Axle transmission cylinder (axle fitting insertion part)
61 Front axle (axle)
74 Wheel support member 81 Axle transmission cylinder (axle fitting insertion part)
83 Rear axle (axle)
L Front wheel radius X Rear wheel radius S Narrow tread T Wide tread

Claims (1)

In the riding-type mobile farm machine, which has a driving part arranged on the machine body supported by a pair of left and right front wheels,
The vehicle body is provided with a wheel support member that is longer than the radius of the front wheel and the rear wheel, and the wheel support member has an axle insertion portion for inserting the axles of the front wheel and the rear wheel at the lower end thereof. Have
The axle is configured to be slidable between a position protruding from the axle fitting insertion portion made of a cylindrical member formed over the entire length of the wheel support member in the body width direction and a position protruding outside the body. ,
These axles are selectively protruded inside or outside the body with the wheel support member interposed therebetween, and the tread is changed by mounting the front wheel and the rear wheel on the projecting ends.
A riding-type mobile agricultural machine.

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