JP4032570B2 - Agricultural machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a traveling unit body in a riding farm work machine such as a rice transplanter.
[0002]
[Prior art]
2. Description of the Related Art A so-called midship type farm work machine is known in which an engine is mounted on a front and rear central portion located between a front wheel and a rear wheel in a side view of a traveling unit body, and a control seat is installed on the upper side of the engine. Conventionally, this type of midship type farm work machine has a problem that the seat position is high and the balance of the machine body is poor.
[0003]
[Problems to be solved by the invention]
Then, this invention makes it a subject to make it the structure of the traveling part body which does not become very high in a midship type farm working machine.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is configured as follows. That is, the agricultural machine according to the present invention is a farm machine in which the agricultural work unit is mounted behind the traveling unit, wherein the traveling unit is a four-wheel drive vehicle including a pair of left and right front wheels and a rear wheel. A spare seedling frame (5) is provided at the front, and the rotational power of the engine is transmitted to the transmission in the transmission case (10) via a hydraulic continuously variable transmission that can shift both forward and backward. From there, it is configured to transmit to the front wheel, the rear wheel and the planting part, and at the rear of the traveling part, the planting part is mounted so as to be capable of ascending and descending via a lifting link device (3), and a control seat ( 40) is installed behind the steering handle (34) that steers the front wheels via the steering shaft (33) provided in front of the engine, and the transmission of the transmission to the planting part is performed on the right side of the steering seat. For turning on and off and raising and lowering the planting part Planting lift lever (41) is provided, and the planting lift lever is operated to rotate back and forth around the lever axis so that the operation positions of "raising", "fixing", "automatic", and "planting" are set. provided, the operating mechanism having a steering shaft and various levers, pre enclosure with the front cover (50F) and Riyakaba chromatography (5 0L) consisting steering cover (50), supporting the left and right preliminary seedling Nowaku Naeno On the horizontal frame (48) connected to the frame stay (47), a horizontal step floor (45) divided into two parts in the front and rear is provided, and both (45A, 45B) constituting the step floor (45) are provided. ) Is positioned on the horizontal frame (48) so that the planting lift lever (41) can be tilted inward, and the planting lift lever (41) is provided on the rear step floor (45B). The base of The lever cover part (45a) is integrally formed, the lever guide of the lever cover part (45a) is opened inward, and the engine hood (52) covering the upper part of the engine is placed on the rear step floor (45B). It is characterized by being in the state of being placed .
[0005]
Therefore, by mounting the engine with the cylinder head directed obliquely , the engine height can be lowered, and the seat position installed on the upper side can also be lowered. Moreover, a person can walk by providing a horizontal step floor between the hood that covers the engine and the cover that covers the steering shaft.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, as an embodiment of the present invention, a riding rice transplanter, which is a kind of agricultural machine, will be described. In this riding rice transplanter 1, a six-row planting part 4 as an agricultural work part is mounted on a rear side of a traveling vehicle body 2 as a traveling part via an elevating link device 3 so as to be movable up and down. Since the planting part 4 is a well-known structure, description is abbreviate | omitted. Further, preliminary seedling frames 5 and 5 are provided at the left and right front portions of the traveling vehicle body 2.
[0009]
The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 7 and 7 and rear wheels 8 and 8, and is a main frame provided extending rearward from a rear surface portion of a transmission case 10 disposed in the front portion of the airframe. An engine 12 is mounted on 11. The rotational power of the engine 12 is transmitted to the transmission in the transmission case 10 via a hydraulic continuously variable transmission 13 that can shift both forward and reverse, from which the front wheels 7 and 7 and the rear wheels 8 and 8 are transmitted. , And to each drive unit of the planting unit 4.
[0010]
The engine 12 is an air-cooled two-cylinder vertical engine and is provided symmetrically with the cylinder heads 12a, 12a facing diagonally forward. This engine 12 has a left-right center C.I. of the fuselage in order to balance the weight with the counter case 15 provided on the left side of the engine. L. It is arranged with a slight deviation to the right. An air cleaner 16 and a carburetor 17 are provided on the front side of the engine body between the cylinder heads 12a and 12a. A muffler 18 is provided in front of it. A cell motor 20 and a rectifier 21 are provided on the right side of the engine body, and an oil filter 22 is provided on the left side. Further, a fuel tank 23 is provided on the right side of the engine 12.
[0011]
The engine output shaft 12b protrudes downward, and transmits power from the engine output shaft to the input shaft 15a of the counter case 15 via the transmission belt 25. The output shaft 15b of the counter case 15 projects horizontally toward the engine side. Then, power is transmitted from the counter output shaft 15 b to the input shaft 13 a of the hydraulic continuously variable transmission 13 through the transmission belt 26 and also transmitted to the drive shaft of the generator 28 through the transmission belt 27. . When a working unit other than the planting unit 4, such as a shaving device, a tilling device, or the like, is mounted on the rear side of the traveling vehicle body 2, a transmission case 30 is provided at the rear of the traveling vehicle body 2 as shown by a chain line in FIG. 4. The power is transmitted from the counter output shaft 15b to the transmission case 30 via the transmission belt 31.
[0012]
In this way, by installing a V-type two-cylinder vertical engine with the cylinder head directed obliquely forward, the engine height can be kept low, and the center of gravity of the aircraft can be lowered. In addition, since the peripheral equipment of the engine is divided into left and right parts such that the electrical equipment and fuel are on the right side of the engine and the transmission relation is on the left side of the engine, the left and right weight balance is good and maintenance is easy.
[0013]
A steering shaft 33 of a steering device that steers the front wheels 7 is provided through the front portion of the transmission case 10 vertically. The steering shaft 33 rotates in proportion to the operation amount of the steering handle 34. Around the steering shaft 33, operation mechanisms such as the following various levers are provided. 35 is a change lever for switching the main shift, 36 is a shift lever for operating the hydraulic continuously variable transmission 13, and 37 is a lift lever for switching the planting part 4 from the operating state to the non-operating state.
[0014]
A control seat 40 is provided on the upper side of the engine behind the steering handle 34. The seat 40 is installed on an engine hood 52 described later. On the left and right sides of the seat 40, the following levers are provided. 41 is a planting lift lever for turning on and off the transmission to the planting unit 4 and raising and lowering the planting unit 4, and 42 is whether or not to automatically raise the planting unit 4 when the main shift is reverse. A backlift on / off lever 43 for switching is a sensitivity adjustment lever for adjusting the sensitivity of the lifting control.
[0015]
On the upper side of the chassis excluding the portion in which the steering shaft 33 and the operation mechanism are accommodated and the portion in which the engine 12 is accommodated, a step floor 45 that is horizontal and on which a person can walk is provided. . The step floor 45 is divided into two parts in the front-rear direction, and the divided parts 45A and 45B are positioned on a horizontal frame 48 connected to the left and right spare seedling mounting frame stays 47 and 47. The rear step floor 45B is integrally formed with lever cover portions 45a and 45b that cover the base portions of the levers 41, 42, and 43. The lever guides of the lever cover portions are opened inward.
[0016]
The steering shaft 33 and the operation mechanism are surrounded by a steering cover 50 including a front cover 50F and a rear cover 50L. The steering cover 50 is detachably attached to a steering post (not shown) in the cover in a state where the lower end edge portion is placed on the front step floor 45A. Detachment can be done without using tools.
[0017]
The upper part of the engine 12 is covered with an engine hood 52. The engine hood 52 engages the mounting shaft 53 provided at the lower end of the front end with receiving members 55 and 55 provided at the upper end portion of the support frame 54 protruding upward from the main frame 11, thereby It is pivotally attached as a fulcrum. In the mounted state, the lower end edge of the engine hood 52 is in a state of being placed on the rear step floor 45B. When the engine hood 52 is turned upward by a predetermined angle with the attachment shaft 53 as a fulcrum, the engagement between the attachment shaft 53 and the receiving tool 55 is released, and the engine hood 52 can be removed.
[0018]
When performing maintenance of the engine 12 and its peripheral devices, the front step floor 45A may be left attached and only the engine hood 52 and the rear step floor 45B may be removed. Since the engine hood 52 can be removed separately from the rear step floor 45B, it is easy to remove them. Further, when the engine hood 52 is removed, the levers 41, 42, and 43 can be tilted inward, so that interference with the lever can be prevented when removing the rear step floor 45B.
[0019]
The planting lift lever 41 provided on the right side of the seat 40 is pivoted back and forth around the lever shaft 50, and each operation position of “raising”, “fixing”, “automatic”, “planting” is set. Have. A positioning cam 51 having four recesses formed on the outer peripheral portion is integrally attached to the planting lifting / lowering lever 41. When the planting lifting / lowering lever 41 is operated to any one of the operation positions, a recess corresponding to the operation position is formed. The positioning roller 52 is fitted, and the planting lift lever 41 is stabilized at that position. The positioning roller 52 is supported by a rotatable roller arm 53 and is urged toward the positioning cam 51 by a tension spring 54. Since the planting elevating lever 41 is provided so that the upper end does not protrude above the upper surface of the seat 40 at any operation position, the planting elevating lever 41 is accidentally hooked with a leg when a person enters or exits the seat 40. There is nothing.
[0020]
The planting lift lever 41 is connected to the rear interlocking arm 56 via a connecting rod 55. An operating arm 57 is provided so as to rotate integrally with the connecting arm 56, and a roller 58 pivotally supported at the distal end portion of the operating arm 57 is in contact with a roller of a hydraulic arm 60 that drives a planting part lifting hydraulic valve 59. It is in contact with the surface. A step is provided on the roller contact surface of the hydraulic arm 60, and the hydraulic arm 60 rotates according to the rotation position of the operating arm 57, that is, the operation position of the planting lift lever 41, and the spool 59 a of the hydraulic valve 59. To go in and out. When the planting lift lever 41 is operated to “fix”, the hydraulic valve 59 is in a neutral state, and when it is operated to “raise”, the hydraulic valve 59 is switched to the side where the planting part 4 is raised, and “automatic” or “planting” Is operated, the hydraulic valve 59 is switched to the side where the planting part 4 is lowered.
[0021]
In addition to the hydraulic arm 60, an automatic lifting arm (not shown) that interlocks with the ground height detection float of the planting unit 4 is in contact with the spool 59 a of the hydraulic valve 59. Thereby, according to the change of the ground height of the planting part 4, the hydraulic valve 59 is switched so that the planting part 4 is always kept at a constant height. The sensitivity of this planting part automatic raising / lowering control can be adjusted by the sensitivity adjustment lever 43.
[0022]
Further, a planting clutch arm 63 engaged with the planting clutch operating clutch pin 62 is connected to an intermediate portion of the operating arm 57 via a planting clutch wire 64. Thereby, when the planting lift lever 41 is operated to “automatic” or “planting”, the clutch pin 62 is pushed in and the planting clutch is engaged. When operated to “raise” or “fixed”, the clutch pin 62 is returned by the spring 65 and the planting clutch is disengaged.
[0023]
The roller arm 53 is connected to the change lever 35 via a back lift wire 67, and when the main speed shift is in the reverse direction, the roller arm 53 rotates to the side where the positioning roller 52 is separated from the positioning cam 51. Then, since the restriction by the positioning roller 52 is released, the planting lifting / lowering lever 41 is pulled by the backlift spring 68 and rotated to the “raised” position, and the planting unit 4 is automatically raised.
[0024]
The backlift on / off lever 42 is a lever for turning on and off the backlift function, and is provided on the same lever shaft 50 as the planting lift lever 41. When the outer end of the backlift wire 67 is supported at the lower end of the backlift on / off lever 42 and the backlift on / off lever 42 is in “on”, the positional relationship between the backlift wire 67 and the roller arm 53 is It is maintained properly and the backlift function is working. However, when the backlift on / off lever 42 is set to “OFF”, the fulcrum of the backlift wire 67 moves rearward and the inner of the wire is loosened, so that the roller arm 53 is pulled by the tension spring 54 and the positioning roller 52 is positioned. The cam 51 is fixed in a state of being fitted into the recess. For this reason, it becomes impossible to move the planting elevating lever 41, and the planting part 4 does not rise even if the main gear shift is reverse.
[0025]
Thus, by arranging the operation unit and the operation unit of the hydraulic lifting mechanism in the front and rear, the configuration is simplified, and assembly and maintenance are facilitated and the cost is reduced. In addition, the planting lift lever 41 and the backlift on / off lever 42 can be arranged at positions that are most easily operated by the operator near the right side of the seat 40, and operability can be improved.
[0026]
As is apparent from the above description, the agricultural working machine according to the present invention can lower the position of the control seat, lower the center of gravity, and can easily perform engine maintenance. Moreover, since a horizontal step floor (45) divided into two parts in the front and rear is provided on the horizontal frame (48) connected to the spare seedling mounting frame stay (47), a person can walk on it. Yes, workability is improved. Further, when the engine hood (52) is removed, the planting lift lever (41) can be tilted inward so that it can be prevented from interfering with the planting lift lever (41) when the rear step floor (45B) is removed. became.
[Brief description of the drawings]
FIG. 1 is a side view of a riding rice transplanter.
FIG. 2 is a plan view of a riding rice transplanter.
FIG. 3 is a side view around the engine.
FIG. 4 is a plan view around the engine.
FIG. 5 is a rear view around the engine.
FIG. 6 is an exploded perspective view of the floor step, the steering cover, and the engine hood.
FIG. 7 is a side view of a hydraulic device operating mechanism.
[Explanation of symbols]
1 Passenger rice transplanter (agricultural work machine)
2 Traveling body (traveling part)
3 Lifting link device 4 Planting part (agricultural work part)
7 Front wheel 8 Rear wheel 12 Engine 12a Cylinder head 15 Counter case 33 Steering shaft 40 Seat 41 Planting lift lever 42 Back lift on / off lever 45 Step floor 50 Steering cover 52 Engine hood 59 Hydraulic valve

Claims (1)

In the agricultural machine having a farming unit mounted behind the traveling unit, the traveling unit is a four-wheel drive vehicle including a pair of left and right front wheels and a rear wheel, and a spare seedling mounting frame (5) is provided on the left and right front parts of the traveling unit. And transmit the rotational power of the engine to the transmission in the transmission case (10) via a hydraulic continuously variable transmission that can shift both forward and reverse, and from there the front wheels, rear wheels and planting The planting portion is mounted on the rear side of the traveling portion so as to be movable up and down via a lifting link device (3), and a control seat (40) is provided in front of the engine. It is installed behind the steering handle (34) that steers the front wheel via the steering shaft (33), and the transmission to the planting part is turned on and off the planting part on the right side of the steering seat. Planting elevating lever (41) for The lifting lever is provided with operating positions of “raising”, “fixing”, “automatic”, and “planting” so as to rotate back and forth around the lever shaft, and an operating mechanism having the steering shaft and various levers. , the enclosure in the front cover (50F) and Riyakaba chromatography (5 0L) consisting steering cover (50), the horizontal frame is connected to the preliminary seedling Nowaku stay (47) for supporting the left and right preliminary seedling Nowaku (48 ) Is provided with a horizontal step floor (45) that is divided into two parts at the front and rear, and the divided portions of both (45A, 45B) constituting the step floor (45) are arranged on the horizontal frame (48). The planting lift lever (41) can be tilted inward, and a lever cover (45a) that covers the base of the planting lift lever (41) is integrated with the rear step floor (45B). Form, the lever guide of the lever cover (45a) is open to the inside, characterized by further engine hood covering the upper portion of the engine (52) has a state of rest on the rear step floor (45B) Agricultural machine.

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