JPH0837835A - Mobile farm machine - Google Patents

Abstract

PURPOSE:To easily enable to reduce a fixing width in the up and down directions for fixing a non-stage belt speed-change case and a front wheel transmission shaft by arranging the non-stage belt speed-change case, the front wheel transmission shaft, etc., and installing the front wheel transmission shaft in a concave part of the case bottom. CONSTITUTION:This mobile farm machine is equipped with a non-stage belt speed-change case 59 which transmits an engine output and is installed between the left frame and the right frame of the machine body. In the non-stage belt speed-change case 59, an input pulley 69 and an output pulley 70 are almost bisymmetrically arranged. In the center of the bottom of the non-stage belt speed-change case 59, a concave part 92 is formed facing downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a rice transplanter which is equipped with a seedling mount and a planting claw for continuously performing seedling work.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Laid-Open No. 63-150146, there has been a technique of providing a continuously variable belt transmission case having a fixed pulley and a movable pulley.

[0003]

In the prior art, since the continuously variable belt shifting case is offset to one side with respect to the longitudinal centerline of the machine body, the vertical width for providing the case and the lower front wheel transmission shaft can be easily reduced. There was a problem such as not getting a little. Further, it is necessary to assemble the continuously variable belt transmission case in a state in which the transmission belt is tensioned between the pulleys, and there is a problem that the case is troublesome to fit and fix. Further, when the ventilation opening is formed in the continuously variable belt shift case, there is a problem that water or the like enters the case and the belt slips.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, there is provided a continuously variable belt transmission case for transmitting the engine output, and the continuously variable belt transmission case provided between the left and right vehicle body frames. The input pulley and the output pulley to be installed in the speed change case are arranged substantially symmetrically, and a downward recess is formed in the center of the bottom of the stepless belt speed change case.The stepless belt speed change case and the front wheels are located on the longitudinal centerline of the machine body. A transmission shaft or the like can be arranged, and a front wheel transmission shaft can be provided in the recessed portion of the case bottom to easily reduce the vertical mounting width of these, for example, to lower the upper surface position of the continuously variable belt transmission case or lower the front wheel transmission shaft position. The height can be increased to easily make the airframe compact.

Further, in a mobile agricultural machine provided with a continuously variable belt transmission case for transmitting engine output, an external operation arm is provided so as to project outside the continuously variable belt transmission case, and a tension spring for tensioning the transmission belt via a tension pulley. The external operation arm is connected inside the stepless belt speed change case, and after the stepless belt speed change case is assembled, the external operation arm is fixed to the tension spring tension position. Assembling the stepless belt speed change case with the tension spring loosened. Therefore, it is possible to easily improve the workability such as the combination of the continuously variable belt transmission case and the fitting of the case and the input / output shaft.

Further, in a mobile agricultural machine provided with a continuously variable belt transmission case for transmitting engine output, a transmission cam is provided in the case, and a roller for contacting the transmission cam is rotatably supported by a support shaft. , A bearing recess opened in the disassembling direction of the continuously variable belt shifting case, and the support shaft detachably fixed to the continuously variable belt shifting case by one bolt, and the continuously variable belt is made by aluminum die casting or the like. The gear shift case and the bearing recess can be easily formed, and the work such as fitting the support shaft into the bearing recess and tightening the bolt to the support shaft can be performed easily, thereby reducing the manufacturing cost and simplifying the assembly work. It can be easily planned.

Further, in a mobile agricultural machine equipped with a continuously variable belt transmission case for transmitting engine output, a hose for ventilating the continuously variable belt transmission case is provided, and the hollow portion of the vehicle body frame communicates with the inside of the continuously variable belt transmission case by the hose. Since it is connected, ventilation of the continuously variable belt transmission case is performed via the hose, so it is possible to prevent the temperature inside the case from rising, and there is a problem such as water slipping into the case and the belt slipping. Therefore, the durability of the belt can be improved and the transmission efficiency can be easily maintained.

Further, the exhaust port of the continuously variable belt transmission case to which the hose is connected is provided on the outer diameter side of the pulley, and the air in the continuously variable belt transmission case is efficiently discharged from the exhaust port by utilizing the wind generated by the pulley. It can be delivered and the ventilation efficiency can be easily improved.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a cross-sectional front view of the transmission case part, FIG. 2 is a side view of the passenger rice transplanter, and FIG. 3 is a plan view thereof. In the figure, (1) is a traveling vehicle on which an operator rides, and an engine (2). Is mounted above the front part of the vehicle body frame (3) to support the front wheels (6) for traveling the paddy field through the front axle case (5) in front of the gear shift case (4), and the gear shift case (4) A rear axle case (7) is connected to the rear part, and the rear axle case (7) supports the rear wheel (8) for traveling paddy fields. Then, the spare seedling mounts (10) are attached to both sides of the bonnet (9) covering the engine (2), etc., and the gear shift case (4) is attached by the vehicle body cover (12) on which an operator rides through the step (11). )
And a driver's seat (1) above the vehicle body cover (12).
3) is mounted, and a steering handle (14) is provided in front of the driver's seat (13) and behind the hood (9).

Further, (15) in the figure is a planting section provided with a seedling table (16) for planting 6 rows, a plurality of planting claws (17), etc. Forward tilting seedling stand (1
6) is supported on the planting case (20) through the lower rail (18) and the guide rail (19) so as to be slidable left and right, and at the same time, the rotary case (21) is rotated at a constant speed in one direction. The pair of claw cases (22) and (22) are supported at the case (20), and a pair of claw cases (22) and (22) are arranged symmetrically around the rotation axis of the case (21).
(22) Attach the planting claws (17) (17) to the tip. A support frame (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and a three-point link mechanism (27) including a top link (25) and a lower link (26) is provided. Elevating cylinder (28) for connecting a supporting frame (24) to the rear side of the traveling vehicle (1) and moving up and down the planting part (15) through the link mechanism (27).
Is connected to the lower link (26), and the front and rear wheels (6) are connected.
(8) is driven to move, and at the same time, the seedlings for one plant are planted from the seedling table (16) that slides back and forth to the left and right.
It is taken out according to 7) and the seedlings are planted continuously.

Further, in the figure, (29) is the main transmission lever, (3
(0) is a sub-shift lever for planting up / down and work traveling gear shifting, (3
1) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, and (3)
4) is a center float for two-row leveling, (35) is a side float for two-row leveling, and (36) is a side-row fertilizer applicator for six rows.

Further, as shown in FIGS. 4, 5, 6 and 7, a pedestal (37) is mounted on the upper surface of the front portion of the body frame (3) to be tilted to a front low rear height (inclination angle of about 4 degrees). The engine base (39) is integrally fixed, and the engine base (39) is mounted on the upper surface side of the frame (37) in a substantially horizontal direction in the front-rear direction via a vibration-proof rubber, and the engine (2) is mounted on the engine base (39). A fuel tank (40) is mounted on the left side of (2), a muffler (41) is mounted on the right side of the engine (2), and a battery (43) is mounted on the front end side of the vehicle body frame (3).

Further, the steering case (44) is attached to the vehicle body frame (3), and the steering shaft (46) of the steering handle (14) to be inserted into the cylindrical body (45) is
The left and right front wheels (6) (6) ( Steering arm (4)
8) is attached to the output shaft (47).

A cylindrical bearing body (49), which is substantially horizontal in the front-rear direction, is welded and fixed to the rear end of the engine base (39) below the engine (2), and the counter shaft is attached to the bearing body (49). (50) The front side is supported by a cantilever and the counter shaft (5
0) A counter pulley (51) is attached to the rear end side, and an alternator (52) is attached to the right side of the tubular body (45).
Is installed, and the alternator (5
2) Face-to-face arrangement, left and right body frame (3)
The output shaft of the engine (2) (5
3) is provided, an output pulley (54) is attached to the output shaft (53), the output pulley (54) is connected to the counter pulley (51) through a V belt (55), and an alternator (52) is provided. The output pulley (54) is connected to the input pulley (56) through the V belt (57).

Further, a rear axle case (7) is fixed to the rear end of the vehicle body frame (3) by bolts, and a gear shift case (4) is provided on the front surface of the rear axle case (7).
The rear surface is connected and fixed, and the clutch case (58) is integrally formed on the front surface on the right side of the gear transmission case (4), and the continuously variable belt transmission case (5) is formed on the front surface of the clutch case (58).
9) The right rear surface is connected and fixed, and the lifting cylinder (2
A hydraulic pump (60) for operating 8) is fixed to the left rear surface of the belt transmission case (59), and is located between the left and right rectangular pipe-shaped body frames (3) (3) at a position lower than this upper surface. The cases (4) (58) (59) and the hydraulic pump (60) are suspended and fixed, and the transmission shaft (61) with a universal joint is connected to the counter shaft (5).
0) It is provided between the rear end and the belt speed change case (59) to transmit the output of the engine (2) to the belt speed change case (59), and also between the front axle case (5) and the gear speed change case (4). 62) is provided so that the shift output of the gear shift case (4) is transmitted to the front and rear wheels (6) and (8) via the respective axle cases (5) and (7).

Further, a lower link fulcrum shaft (63) is provided at the rear end of the body frame (3), and the lower link (26) front end is attached to the fulcrum shaft (63), and the left and right body frames (3) ( 3) Gate-shaped support (64) between the rear ends
Is provided upright, a fertilizer applicator stand (65) is provided on the upper end of the column (64), and the front end of the top link (25) is attached to the stand (65) via the top link fulcrum shaft (66).

Further, a pedal fulcrum pipe (67) provided with the brake pedal (33) is provided, and the pipe (67) is inserted into the left and right vehicle body frames (3) (3), and both ends of the pipe (67) are provided. Are welded and fixed to the vehicle body frame (3), the pipe (67) is attached as a connecting member of the left and right vehicle body frames (3) and (3), and the left and right subframes (68) (6) to which the lifting cylinder (28) is attached.
8), and a sub-frame (6
8) The front end is welded and fixed to the pedal fulcrum pipe (67), and the rear end of the subframe (68) is welded and fixed to the upper end of the column (64).

Further, as shown in FIG. 8, an input / output pulley (69) for continuously changing the gear ratio by changing the winding diameter.
(70) and the speed change belt (71) are provided inside the belt speed change case (59), and the front end of the input shaft (72) of the belt speed change case (59) is connected to the counter shaft (59) through a transmission shaft (61) with a universal joint. 50) The rear end and the input shaft (72) are directly connected to the hydraulic pump (60) and the multi-disc friction type dry clutch (73) which is intermittently operated by the clutch pedal (32). ), And the output shaft (74) of the belt speed change case (59) is connected to the input shaft (7) of the gear speed change case (4).
5) is connected via the clutch (73).

A traveling output shaft (77) is connected to the input shaft (75) through a traveling transmission gear mechanism (76),
Front and rear wheels (6) and (8) have front and rear wheel transmission shafts (62) (77a)
The traveling output shaft (77) is connected to drive the front and rear wheels (6) and (8), and the input shaft (75) is connected to the PTO shaft (79) via the PTO speed change gear mechanism (78).
And the planting part (15) through the PTO shaft (79).
Is driven, and the output of the PTO shaft (79) is branched by the sprocket (80) near the gear shift case (4) to drive the fertilizer applicator (36).

Further, as shown in FIGS. 1 and 8, the tension roller (81) and the input / output cams (82) (8) for changing the belt winding diameter of the input / output pulleys (69) (70).
3) and input / output rollers (84) and (85) that come into contact with the cams (82) and (83), respectively, and a speed change arm (a speed change arm (59) via a speed change shaft (86) to the belt speed change case (59). 87) is provided.

Then, as shown in FIG. 9, the link (88)
The input / output cams (82) and (83) are connected to the speed change shaft (86) through the rod (89) and the connecting rod (90), and the speed change arm (87) is connected through the wire (91). The auxiliary shift lever (30) shown in FIG. 3 is connected to the input / output shaft (72) by operating the auxiliary shift lever (30).
The input / output cams (82) and (83) are rotated around (74) to change the width of the input / output pulleys (69) and (70) to change the winding diameter of the speed change belt (71).
9) The gear ratios of (70) and the speed change belt (71) are continuously changed.

Further, as shown in FIGS. 1 and 5, the left and right vehicle body frames (3) and (3) extending in the front-rear direction in a substantially straight line shape.
The belt shift case (59) is fixed substantially at the center of the space, and the lateral center of the belt shift case (59) is positioned on the longitudinal centerline of the traveling vehicle (1). Continuously variable belt transmission case (5
In an agricultural machine equipped with 9) and provided with the continuously variable belt transmission case (59) between the left and right vehicle body frames (3) (3), an input pulley (69) internally provided in the continuously variable belt transmission case (59). The output pulley (70) and the output pulley (70) are arranged substantially symmetrically, and a downward recess (92) is formed at the center of the bottom of the continuously variable belt transmission case (59).
9) A structure is provided in which the front wheel transmission shaft (62) is provided in the recessed portion (92) at the bottom so that the vertical mounting width of these can be easily reduced. The position of the shaft (62) is raised so that the body can be made compact.

Further, as shown in FIGS. 1, 8 and 10.
The middle of the tension arm (93) is rotatably attached to the input shaft (72), and the shaft (9) is attached to one end of the arm (93).
4) A tension roller (81) is rotatably provided, and one end of a tension spring (94) is connected to the other end of the arm (93). Further, a bearing shaft (9) in which the middle of the bearing shaft (95) is rotatably supported by the belt shift case (59) so as to project into the case (59).
5) The receiving arm (96) base end is integrally fixed to one end side of
The end of the tension spring (94) is locked to the tip of the receiving arm (96), and the tension spring (94) is connected between the tension arm (93) and the receiving arm (96). On the other hand, the receiving shaft (95) protruding outside the case (59)
To the other end of the lock arm (98) via a pin (97)
The base end is fixed, and the tip of the lock arm (98) is fixed to the outer surface of the case (59) by a bolt (99), and each arm (96) is fixed by the bolt (99).
(98) is integrally fixed to the case (59), the tension spring (94) is supported in a tensioned state, and the tension roller (94) is brought into pressure contact with the speed change belt (71) to increase the tension of the speed change belt (71). A tension for tensioning the speed change belt (71) via a tension pulley (81) by keeping a lock arm (98), which is an external operation arm, outside the stepless belt speed change case (59) in order to keep the speed above a predetermined level. The spring (94) and the lock arm (98) are connected inside the stepless belt speed change case (59), and the lock arm (98) is assembled after the stepless belt speed change case (59) is assembled.
Is fixed to the tension spring (94) in a tensioned position, and the stepless belt transmission case (59) is assembled with the tension spring (94) being loosened, and the lock arm (98) is bolted after the case (59) is assembled. (99) When the case (59) is assembled, the input / output shafts (72) (7) are fixed by fixing and fixing the tension spring (94).
3) The force for reducing the distance is not exerted, and the stepless belt transmission case (59) can be easily combined and the case (59) and the input / output shafts (72) (74) can be easily fitted. I am configuring.

Further, as shown in FIGS. 8 and 11, the belt shifting case (59) is formed by front and rear case bodies (100) (101) having a split structure, and the bearing type rollers (84) ( 85) support shaft (10
2) ... The front and rear case bodies (10
0) The bearing recesses (103) ... Opened in the contact (separation separation) direction of (101) are formed on the inner surface of the case (59), and one end side of the spindle (102) is fitted into the bearing recess (103). Then, the other end of the support shaft (102) is attached to the case (59).
Fix the inner surface with bolts (104) and fix the case (5
9) Each roller (84) on the inner surface via the support shaft (102).
(85) is detachably attached, and the support shaft (102) is continuously mounted by a bearing recess (103) opened in the disassembling direction of the continuously variable belt transmission case (59) and one bolt (104). By being detachably fixed to the belt speed change case (59), the stepless belt speed change case (59) and the bearing recess (103) can be easily formed by aluminum die casting or the like, and the bearing recess (103) can be supported. Fitting the shaft (102) and supporting shaft (1
It is configured so that work such as tightening the bolt (104) to the 02) can be easily performed.

Further, as shown in FIGS. 8 and 12, an intake fan (105) is integrally formed on the front side of the output pulley (70), and intake air is drawn on the front side of the belt transmission case (59) in front of the output pulley (70). The opening (106) is opened, and the square pipe-shaped right body frame (3) hollow part and the intake port (106)
Are connected to each other by an intake hose (107) so that air in the hollow part of the right body frame (3) is sucked into the right side of the case (59) from the front side and an exhaust fan is provided on the rear side of the input pulley (69). (108) is integrally formed, and an exhaust port (109) is opened in the rear portion of the left side surface of the belt transmission case (59) behind the input pulley (69), and an exhaust port (109) is provided on the outer diameter side of the input pulley (69). Is provided
The hollow portion of the left body frame (3) having a square pipe shape and the exhaust port (109) are connected to each other by an exhaust hose (110), and the air in the left rear portion of the case (59) is communicated from the rear portion of the left side surface to the left body frame (3). It is configured to be discharged into the hollow portion.

As is apparent from the above, the intake hose (10) is provided on the right side and the left side of the belt transmission case (59).
7) and the exhaust hose (110) are connected, and the hose (10) between the case (59) and the body frame (3) (3) is connected.
7) The structure for easily connecting (110) from the outside of the vehicle body frame (3) (3), and the case (59)
The air inside the right body frame (3) is taken into the case (59) from the front right side of the front side, and the air inside the case (59) is taken from the left rear side of the case (59) into the left body frame (3).
In order to ventilate the inside of the case (59), a hose (107) (110) for ventilating the stepless belt transmission case (59) is provided, and the hose (3) and the hollow portion of the vehicle body frame (3) are stepped. The inside of the belt speed change case (59) is connected and connected by the hoses (107) and (110) to prevent the temperature rise inside the case (59), and eliminate the problem that water enters the case (59). , Stepless belt transmission case (5) for connecting the hose (110)
The exhaust port (109) of 9) is provided on the outer diameter side of the pulley (69), and the air in the stepless belt transmission case (59) is sent out from the exhaust port (109) by utilizing the wind generated by the pulley (69). Is configured as follows.

[0027]

As is apparent from the above embodiments, the present invention is provided with the continuously variable belt transmission case (59) for transmitting the output of the engine (2) and the left and right vehicle body frames (3).
In a mobile agricultural machine in which the stepless belt speed change case (59) is provided between (3), an input pulley (69) and an output pulley (70) internally provided in the stepless belt speed change case (59).
Are arranged substantially symmetrically, and a downward concave portion (92) is formed at the center of the bottom of the continuously variable belt transmission case (59). The continuously variable belt transmission case (5
9) and the front wheel transmission shaft (62), etc., and the front wheel transmission shaft (62) is provided in the recess (92) at the bottom of the case (59) so that the vertical mounting width of these can be easily reduced. By lowering the position of the upper surface of the step belt transmission case (59) or raising the position of the front wheel transmission shaft (62), it is possible to easily make the airframe compact.

Further, in the mobile agricultural machine provided with the continuously variable belt transmission case (59) for transmitting the output of the engine (2), the external operation arm (98) is provided on the outside of the continuously variable belt transmission case (59) so as to project the tension. Pulley (81)
A tension spring (94) for tensioning the speed change belt (71) via the external operation arm (98) is connected inside the stepless belt speed change case (59), and external operation is performed after the stepless belt speed change case (59) is assembled. The arm (98) is fixed to the tension position of the tension spring (94), and the stepless belt speed change case (59) can be assembled with the tension spring (94) loosened. It is possible to easily improve workability such as combination of 59) and fitting of the case (59) and the input / output shafts (72) (74).

Further, the continuously variable belt transmission case (59) for transmitting the output of the engine (2) is provided, and the transmission cams (82) (83) are provided in the case (59), and the transmission cam (82) is also provided. Roller (84) to abut (83)
In a mobile agricultural machine in which (85) is rotatably supported by a support shaft (102) ..., a bearing recess (103) and one bolt (104) opened in the disassembling direction of the continuously variable belt transmission case (59). The support shaft (102) is detachably fixed to the stepless belt speed change case (59) by means of aluminum die-casting or the like to easily form the stepless belt speed change case (59) and the bearing recess (103). In addition to the above, the support shaft (10) to the bearing recess (103)
2) Fitting and bolt (10) to the support shaft (102)
4) Work such as tightening can be easily performed, and manufacturing cost can be reduced and assembling work can be simplified.

Further, in a mobile agricultural machine provided with a continuously variable belt transmission case (59) for transmitting the output of the engine (2), hoses (107) (110) for ventilating the continuously variable belt transmission case (59) are provided, and a vehicle body is provided. The hollow part of the frame (3) and the inside of the continuously variable belt transmission case (59) are connected by the hoses (107) and (110) for communication.
Since the continuously variable belt case (59) is ventilated through the hoses (107) (110), the case (5)
9) The internal temperature rise can be prevented, and the case (5
9) It is possible to eliminate problems such as slippage of the belt (71) due to intrusion of water into the interior, and it is possible to easily improve durability of the belt (71) and maintain transmission efficiency.

Further, the exhaust port (109) of the continuously variable belt transmission case (59) to which the hose (110) is connected is provided on the outer diameter side of the pulley (69). As a result, the air in the continuously variable belt transmission case (59) can be efficiently discharged from the exhaust port (109), and the ventilation efficiency can be easily improved.

[Brief description of drawings]

FIG. 1 is a sectional front view of a transmission case section.

FIG. 2 is a side view of a riding rice transplanter.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of the traveling vehicle.

FIG. 5 is a plan view of the same.

FIG. 6 is an enlarged side view of a rear portion.

FIG. 7 is a drive system diagram of the traveling vehicle.

FIG. 8 is a cross-sectional plan view of the transmission case section.

FIG. 9 is an enlarged view of a shift cam portion.

FIG. 10 is an enlarged view of a tension spring portion.

FIG. 11 is an enlarged view of a roller portion.

FIG. 12 is a front view of a transmission case portion.

[Explanation of symbols]

 (2) Engine (3) Body frame (59) Continuous belt gear shifting case (69) Input pulley (70) Output pulley (71) Gear shifting belt (81) Tension pulley (82) (83) Gear shifting cam (84) (85) ) Roller (92) Downward recess (94) Tension spring (98) Lock arm (external operation arm) (102) Spindle (103) Bearing recess (104) Bolt (107) Intake hose (109) Exhaust port (110) Exhaust hose

Claims (5)

[Claims] 1. A mobile agricultural machine comprising a continuously variable belt transmission case for transmitting an engine output, wherein the continuously variable belt transmission case is provided between the left and right vehicle body frames, and an input pulley and an output provided inside the continuously variable belt transmission case. A mobile agricultural machine characterized in that pulleys are arranged substantially symmetrically and a downward recess is formed in the center of the bottom of the continuously variable belt transmission case. 2. A mobile agricultural machine having a continuously variable belt transmission case for transmitting engine output, comprising a tension spring for tensioning a transmission belt via a tension pulley, wherein an external operation arm is provided on the outside of the continuously variable belt transmission case. A mobile agricultural machine, wherein the external operation arm is connected inside a continuously variable belt transmission case, and the external operation arm is fixed to a tension spring tension position after the continuously variable belt transmission case is assembled. 3. A mobile agricultural machine comprising a continuously variable belt transmission case for transmitting engine output, wherein a transmission cam is provided in the case, and a roller abutting against the transmission cam is rotatably supported by a support shaft. A mobile agricultural machine, wherein the support shaft is detachably fixed to the continuously variable belt transmission case by a bearing recess opened in the disassembling direction of the continuously variable belt transmission case and one bolt. 4. A mobile agricultural machine comprising a continuously variable belt transmission case for transmitting engine output, wherein a hose for ventilating the continuously variable belt transmission case is provided, and a hollow portion of the vehicle body frame communicates with the inside of the continuously variable belt transmission case by the hose. A mobile agricultural machine characterized by being connected. 5. A mobile agricultural machine characterized in that an exhaust port of a continuously variable transmission case for connecting a hose is provided on the outer diameter side of the pulley.