JPS59213302A - Center drive type plowing part in walking type agricultural vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a center drive type tilling section of a walk-behind agricultural vehicle, and its purpose is to provide a cover as a means for rotating the rotary shaft of the walk-behind agricultural vehicle in the forward and reverse directions. In trenching work, the rotary shaft is driven by a combination of gear transmissions, the rotary shaft is rotated 180 degrees, and the direction of rotation of the rotary shaft is switched between forward and reverse rotation. In order to realize a tillage section in which the residual tillage processing board is installed in an appropriate position and is effective even in ordinary tillage work or soil mulling work performed by rotating the rotary shaft by 90 degrees, the drive shaft in the tillage section is is arranged under specific setting conditions, and the gist of the invention is that it has a transmission case for transmitting the power of the prime mover to the left and right running wheels and the rotary shaft of the tilling section, A PTO shaft that receives and receives power from a helical gear supported by a rear cover fixed to the rear of the PTO shaft extends rearward, and a bevel gear transmission is connected to the rear of the PTO shaft. The drive shaft is suspended, and the PTO shaft and the drive shaft are supported by the gear case so that the shaft center of the drive shaft and the shaft center of the PTO shaft match the left and right center line of the aircraft. The rotary shaft is supported at the bottom of the drive shaft case, and the drive shaft case is supported around the axis of the drive shaft so that the rotary shaft is driven at right angles to the drive shaft through a bevel gear transmission at the bottom. In the center drive type tilling section of a walk-behind agricultural vehicle, which is rotatably supported at the lower part of the bevel gear case and configured so that the rotary shaft can rotate 360 degrees in a plane, It is created by intersecting the tangent between the lower part of the outer diameter line of the left and right running wheels and the lower part of the outer diameter line of the tilling claw attached to the rotary shaft, and the axis line extending downward from the axis of the drive shaft. This is because the drive shaft is set so that the front angle θ is smaller than 900 degrees.

In the following, a detailed description will be given based on illustrative drawings. (15) is a prime mover (1), left and right running wheels (2),
It is a walk-behind agricultural vehicle equipped with (2), a tiller (3), a transmission case (5), a handle (16), etc. The power of the prime mover (1) is engine boo IJ - (+7),
The power is transmitted to the input shaft (21) via the V-belt (18), the inlet IJ-(19), etc. by operating the main clutch lever (20) that controls the power connection/disconnection mechanism (not shown). Fixed gears 2) and (23) are fixed to the input shaft Q1), and a wheel shaft (24) is connected to the fixed gears (22) and (23) via a transmission device (not shown) that selectively slides and meshes with the fixed gears (22) and (23). The left and right running vehicles (2) and (2)', which are driven and attached to the wheel axle (plane), are driven in the direction of the arrow (a) or arrow (b), and the agricultural vehicle (18) is driven. To reduce or move backwards.

In addition, the input shaft (21) is equipped with sliding gears 05), (2G
) are slidably wedge-fitted, and are configured to selectively slide and mesh with fixed gears (28) and (29) fixed to the intermediate shaft (2η).

A rear cover (6) is fixed to the upper rear surface of the transmission case (5) with a pin (30), a bevel gear A (7) is supported on the rear cover (6), and a bevel gear A (7) is supported on the rear cover (6). 7) has a hole (31) of different diameters opening rearward. Bevel gear A (
A different diameter shaft (32) provided at the front end of the PTO shaft (8) is fitted into the different diameter hole (31) of 7), and the PTO shaft (8) extends rearward. The bevel gear A (7) has bevel teeth q B (
313) to drive P T O1ltl (8). A bevel gear C (34) is fixed to the rear of the PTO shaft (8), and the bevel gear C04) meshes with the bevel gear D05) fixed to the upper end of the drive shaft (9). to drive. The drive shaft (9) is the PTO shaft (
8) is suspended downward via a bevel gear transmission device including the bevel gear C(34) and bevel gear D05). The axes of the PTO shaft (8) and drive shaft (9) are both the left and right center line of the aircraft.
-PTO shaft (8) and drive shaft (9) to match
) is supported by a bevel gear case 00), and the front end of the bevel gear case (10) is fixed to the rear surface of the rear cover (6) with a pin (36) or the like.

A small bevel gear (37) is wedge-fitted to the lower end of the drive shaft (9), and a large bevel gear (
38) to the rotary shaft (4), and then attach the drive shaft (9) to the rotary shaft (4).
The rotor shaft (4) is supported at the lower part of the dryer shaft case (1) so that the rotor shaft (4) is driven at right angles to the shaft. The upper part of the drive shaft case (11) fits into the lower part of the bevel gear case (10), and is fitted with a stop ring (39) so that the drive shaft case (11) can rotate around the axis of the drive shaft (9). It is supported by the bevel gear case (1o). Drive shaft case (11
) is fitted into the bevel gear case (lo), and a cylindrical part (4o) is formed at the upper part thereof to reinforce the support of the drive shaft case 01). On the outer periphery of the drive shaft case 01),
Lever fixtures (47) and (4η') are fixedly installed, and one of the lever fixtures (47L (47)' has a rotating lever '-(47L) that can be rotated up and down using pin 03 as a fulcrum.
44) is fixed. In addition, the rotating lever (four positions are connected by the lever mount (47), I47)' by the pin (43).
It is removably attached to the lever mount (4
7)' It is provided at a position having a phase of 90° with respect to the hale lever fitting θ7).

In addition, the drive shaft case (11) is attached to the upper surface of the rotary frame (42) through which the small diameter portion (41) of the drive shaft case (11) passes through lever fittings (47), (17)'. A front locking tool (45) and a rear locking tool (4) for locking the rotating lever (44) fixed to the
6), and engage one end of the rotating lever (44) into the locking tools (45) and (46) to close the drive shaft case (1).
1) is configured to lock the rotation. Note that the front locking tool (45) and the rear locking tool (46) are provided oppositely at two positions with a phase of 1800 with respect to the axis of the drive shaft (9). The front end of the rotary frame (42) is fixed to the hitch (48) with a pole (49), etc., and the rear end has a tail wheel (53) via a mounting bracket (54). ) is installed. Remaining tillage treatment board ((to)
is fixed to the drive shaft case 01) with bolts (51) or the like. (55) is a rotary cover.

Therefore, in the present invention, the axial center line S of the drive shaft (9)
-8 is left and right running wheels (2), (2)' in side view
The front angle 9 created by intersecting the tangent line GG that is in contact with the lower part of the outer diameter line 02) of the tiller and the lower part of the outer diameter line (14) of the tilling claw (13) attached to the rotary shaft (4) is The drive axis (9) is set so that it is smaller than 90°,
It consists of a tilling section (3).

Various working devices such as tilling claws (13) are attached to the left and right sides of the rotary shaft (4) of the tilling section (3) configured as described above, depending on the purpose.
Works such as trench digging, earth filling, and ridge forming are performed, and by specifying the conditions of the drive shaft (9) set according to the present invention as described above, its effects can be particularly exhibited in trench digging work. In the following, we will explain the trenching work performed by rotating the rotary shaft (4) in the normal direction (arrow C) and the trenching work performed by rotating the rotary shaft (4) in the reverse direction (arrow 2).

First, when digging a trench with the rotary shaft (4) rotating in the normal direction (arrow C), the transmission mechanism (not shown) is operated, the fixed gear (23) is engaged with the gear of the transmission device (not shown), and the left and right running wheels ( 2) and (2) are set to rotate in the direction of the arrow (b). On the other hand, sliding gears (25) and (26
) to the fixed gear (to) by operating the transmission mechanism (not shown), (
Select @ and set the engaging rotary shaft (4) to the desired rotation speed.

As shown in Fig. 4, the rotation direction of the rotary shaft (4) is determined by the arrow shown in Fig. 1 when the large bevel gear (3→) is located to the right of the left-right center line ).In other words, the rotary lever (44) is fixed to the lever handle (47) of the drive shaft case (II) with a pin (43), and the rotary lever (44) is set to rotate in the direction of Moving lever (44)
However, as shown in Figs. 1 and 5, the front locking device (45)
It is at a time when the government is being involved in an investigation.

In this state, the main clutch lever (QO) is operated, and trench digging work is performed by the power of the prime mover (1) via a power disconnection mechanism (not shown). In this state, as shown in Fig. 6, the direction of movement of the machine is indicated by the arrow (E), and the trench is dug with the tilling claw 03) in an up-cut state with respect to the tilling blade. Drive shaft case (11
) The uncultivated land occurring at the bottom of the plowed soil is transferred to the left and right by the residual tillage processing board (50) and released to the left and right along with other cultivated soil to form a predetermined groove. In this way, when digging a trench in which the rotary shaft (4) rotates in the normal direction (arrow/X), the left and right running wheels (2), (2)' are in a position to run on the bottom surface (57) of the formed trench. This is the result.

Next, the trench digging work is performed by rotating the rotary shaft (4) in reverse (arrow 2) by operating a transmission mechanism (not shown) and moving the fixed gear (Z2).
) are engaged with gears of a transmission device (not shown), and the left and right running wheels (2), (2)' are set to rotate in the direction E of arrow (A). Then, the front locking tool (45) is rotated upward using the pin (43) as a fulcrum (indicated by chain lines in Figure 6) to lock the front. After releasing the locking state with the tool (45), rotate the rotating/mar 44) 180 degrees and engage the rear locking tool (41), and the drive shaft case (11) will also move 180 degrees. The low and clear axes (4) also rotate by 1800°, and the left and right sides are swapped, as shown in Figure 6 (the large bevel gear (to) is located to the left of the left-right center line X-X of the aircraft. As a result, the row/crisp shaft (4) rotates in the direction opposite to that shown in Fig. 4, that is, in the direction of the arrow shown in Fig. 1. Moreover, the tiller claws (13), etc. The direction of the working machine is also oriented in accordance with the reverse direction (as shown by the chain-lined tilling claw sharpening in Figure 1), so remove the tilling claw (13) from the rotary shaft (4) and swap it left and right. Also, since the residual tillage treatment plate (a) also rotates 180° in conjunction with the rotation of the drive shaft case (11), there is no need to change the attachment back and forth.

In this state, as shown in Figure 5, the direction of movement of the aircraft is indicated by the arrow (
), and as in the case of normal rotation of the rotary shaft (4), the groove is dug in an up-cut state with the groove depth dimension a, and the residual tillage treatment plate (50)' also has the same effect. In the trench digging work, which is performed in reverse order (arrow 2), the left and right running wheels (2), (
2)' is ready to travel in front of the groove to be formed, that is, on the field surface (50').

In this way, even in the same trench digging work, the rotary shaft (4
) is rotated forward (arrow C) and reversed (arrow 2), the left and right running wheels (2), (2)' travel at different locations; in the case of forward rotation, the bottom surface of the formed groove (57 ), and in the case of reversal, it travels on the field surface G6)'. This means that there will be a large difference in the attitude of the machine during work between forward and reverse rotations, which will affect the size of the gap between the lower end of the residual tillage treatment plate (toward) and the bottom of the groove. be.

The lower end of the residual tillage treatment board (to) and the bottom of the groove (57), 67)'
If the clearance dimensions b and b' are too thick, a convex portion will appear in the center of the formed groove, and the lower end of the residual tillage treatment board (5D) will be on the bottom surface (57), (57)' of the groove. If the position is lower than , the resistance will increase and hinder the aircraft's progress. In this way, the vertical position of the residual tillage processing board (50) is an important point in p-kneading work.

The present invention rotates the drive shaft case α1) by 180 degrees to rotate the rotary shaft (4) forward and reverse, and also rotates the residual tillage treatment plate (
50) is attached to the drive shaft case (11), the remaining tillage processing plate (60) can be easily removed even if the remaining tillage processing plate 60) is not adjusted up or down in both forward and reverse rotation. The drive shaft (9) is set under specific conditions so that a tilling section (3) can be obtained in which the lower end of the tiller can secure an appropriate clearance dimension with respect to the bottom of the furrow. .

Below, it will be explained under what specific conditions the axial center line S-8 of the drive shaft (9) is set. Figure 8 shows the field surface (50) when the rotary shaft (4) rotates in the normal direction (arrow C) and η at the bottom of the groove as solid lines, and
The bottom surface (57)' of the field surface groove in the case of arrow 2) is shown by a dotted line, and in both cases, the groove depth dimension is the same as the groove depth dimension a in Fig. 5 and Fig. 5 mentioned above. It's the same. In this Fig. 8, a perpendicular line H is drawn from the axis of the rotary shaft (4) to the bottom surface (5η) of the groove, and a perpendicular line ``is drawn to the bottom surface (57)' of the groove, and the perpendicular line H and perpendicular line H' are The axis of the drive shaft (9) is aligned with the line S-8 that bisects the angle slope created.This line S-8 is aligned with the field surface (
It is the center line of left-right symmetry between 56) and 66)', and is also the center line of left-right symmetry of the bottom surface 057) of the groove and ■η'. The axis of the drive shaft (9) is aligned with the line S-8, which is the center line of left-right symmetry, and the drive shaft case 01), which can rotate around the axis of the drive shaft (9), is left tilled. Processing board (
) is fixed, so the rotary shaft (4) is fixed.
) is in the normal rotation (arrow C), the gap at the lower end of the remaining tillage processing plate (50) is the gap b′ at the lower end of the remaining tillage processing plate (GO)′ when the rotary shaft (4) is in the reverse direction. are equal. Therefore, if the residual tillage processing plate (50) is set to have an appropriate clearance in the case of normal rotation, an appropriate clearance will be obtained in the case of reverse rotation as well as in the case of normal rotation.

Now, the line at the bottom of the groove in Figure 8 is the outer diameter line (12) of the left and right running wheels (2) and (2)' in Figure 1.
It is also a line that coincides with the line GG that is in contact with the lower end of the tiller and the lower end of the outer diameter line (14) of the tilling claw (13), so the angle hi in Fig. 1 matches the angle υ in Fig. °-G/2), which is smaller than 90°. 8th
The angles in the figure are left and right running wheels (2), (2)'
Although it varies depending on the outer diameter of the tiller, the outer diameter of the tiller claws (13), the groove depth, etc., the angle σ is always 0°.
As a result, the angle υ in FIG. 1 is always smaller than 90°.

As mentioned above, the tilling section (3) in which the drive shaft (9) is set to specific conditions is extremely effective in trench digging work by rotating the rotary shaft (4) in forward and reverse directions. However, it can be used for ordinary tillage work and rotary shaft (4
) is also effective in earth-moving work, etc., which is performed by locking the PTO shaft (8) in parallel with the PTO shaft (8), and these will be explained below.

First, Figure 9 is a side view of the state in which the residual tillage treatment plate (2) has been removed and normal tillage work is being carried out at the desired tillage depth C, and the direction of movement of the machine is indicated by the arrow (toward). The direction is In this state, the axial center line S- of the drive shaft (9)
8 is almost perpendicular to the tiller (58).

This means that the bending moment acting on the drive shaft case (11) due to the tilling reaction force in the direction of the arrow (G) acting on the tilling claws (13) when viewed from the side is theoretically 20. The drive shaft case (11) according to the present invention is extremely advantageous in terms of the strength of the case (11), and is smaller in size compared to a type in which the upper part of the drive shaft case (11) is inclined forward. This allows for weight reduction.

Next, Fig. 10 shows that the residual tillage processing plate G11b) is removed, the rotary shaft (4) is rotated 90' plane, and the PTO shaft (8) is rotated.
This is a side view of the aircraft in a state in which it is locked in parallel with the lever and is moving in the direction of the arrow (toward) while performing burying work. In this state, the rotary lever (44) is connected to the lever attachment (47). After removing it from the lever and replacing it with the lever mount, the rotary lever (44) is engaged with the front locking tool θ5), and the soil is tilled at the desired plowing depth C. It releases soil to either the left or right to collect soil. Even in this state, the axis S-8 of the drive shaft (9) is almost perpendicular to the tiller (58), so the front tiller claw (13) and the rear tiller claw (13) (To) will act in the same state, making it possible to carry out stable levying work.

As detailed above, in the center drive type tillage unit according to the present invention, the bottom position of the residual tillage processing plate is set at a preset appropriate position in both forward and reverse rotation during trench digging work. Therefore, depending on the field conditions, you can switch to either forward or reverse trench digging with a single touch, and it is also extremely useful for ordinary tillage work and soil mulching work performed by turning the rotary shaft 90'. It has many advantages and features, such as exhibiting effective properties.

[Brief explanation of the drawing]

The attached drawings are drawings illustrating embodiments of the present invention, in which Fig. 1 is a side view of a walking agricultural vehicle, Fig. 2 is a sectional view of the main parts in Fig. 1, and Fig. 6 is a normal rotation view. FIG. 4 is a sectional view of the main part taken along the line Y-Y in FIG. Figure 6 is a sectional view of the main part taken along the y'-y' line in Fig. 5, Fig. 7 is a sectional view of the main part taken along the Z-Z line in Fig. 4, and Fig. 8 is the axis of the drive shaft. Core wire S-8
Figure 9 is a side view during normal tilling work, Figure 1 is an explanatory diagram of
Figure 0 is a side view of the earth-moving work being carried out with the rotary shaft turned 90'. In these drawings, (2) and (2)' are left and right running wheels, (3) is a tiller, (4) is a rake shaft, and (8) is a tiller.
is the PT, 0 axis, (9) is the drive shaft, (11) is the drive shaft case, 02) is the left and right running wheels (2), (2)'
, (+3) is the tilling claw, (14) is the tilling claw (
13) outer diameter line, X-X is the left and right center line of the aircraft, GG is the tangent line that touches the outer diameter line α2) and the outer diameter line (14), S-8
is the axial center line of the drive shaft (4). Patent applicant agent Patent attorney Gu Ike Uzu ON Saitomi ()

Claims (1)

[Claims] It has a transmission case (5) for transmitting the power of the driving force () to the left and right running wheels (2), (2) and the rotary shaft (4) of the tilling section (3), and the transmission case (5) A PTO shaft (8) extends rearward and receives power from a bevel gear A (7) supported by a rear cover (6) fixed to the upper rear part of ). A drive shaft (9) is suspended from the rear of the shaft (8) via a bevel gear transmission, and the shaft center of the drive shaft (9) and the shaft center of the PTO shaft (8) are aligned with the left-right center line X-X of the fuselage. The PTO axis (
8) and the drive shaft (9) are supported by the bevel gear case (lO), and the rotary shaft (4) is placed at right angles to the drive shaft (9) via the bevel gear transmission at the bottom of the drive shaft (9). The rotary shaft (4) is supported at the lower part of the drive shaft case (II) so that the drive shaft (4) can be driven by the In the center drive type tilling section of the walk-behind agricultural vehicle, which is supported at the lower part of the bevel gear case 00) and is configured so that the rotary shaft (4) can rotate 560 degrees in a plane, the left and right the lower part of the outer diameter line (12) of the running wheels (2), (2)';
An axial center line S extending the axial center of the drive shaft (9) downward is connected to a tangent line GG which is in contact with the lower part of the outer diameter line (14) of the tilling claw (3) attached to the rotary shaft (4). So that the front angle 9 created by intersecting -8 is smaller than 90°,
A center drive type tilling section in a walk-behind agricultural vehicle, characterized in that a drive shaft (9) is provided.