JPS6222562B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a residual tillage processing device that is capable of tilling the lower part of a drive chain case that supports a rotary shaft, and improves the durability of the flexible seal of the residual tillage processing rotor. It is an object of the present invention to provide a residual tillage processing device that allows the tillage operation to be performed reliably and the processing mechanism to operate smoothly.

Next, the structure of the present invention will be explained based on one embodiment shown in the drawings. As shown in FIG. However, the rotary pipe 6 of the main rotor 5, which has tilling claws 4 implanted on its outer periphery, is spline-fitted to the left and right outer parts of the rotary shaft 2. Furthermore, in order to expand the tilling width, An auxiliary rotor 8 is fitted into the outer part of the rotary pipe 6, and a mounting bolt 9 screwed into the rotary shaft 2 allows the auxiliary rotor 8 to extend coaxially with the main rotor 5.

Then, a mounting seat 10 is fixed to the left and right outer sides of the drive chain case 1 outside the outer periphery of each bearing 3, and the inner hole of the hollow cylindrical fixed shaft 11 is fitted onto the rotary shaft 2. Inner mounting seat 1 of fixed shaft 11
1a is aligned with the mounting seat 10, and fix the fixed shaft 11 to the mounting seat 10 with the mounting bolts 12.

Further, the cylindrical shaft portion 11b of the fixed shaft 11 is formed to have a circular cross section, and the cylindrical center line D of the cylindrical shaft portion 11b is aligned with respect to the axial center line C of the rotary shaft 2 during the above-mentioned installation.
The intersection angle (α) between the shaft center line C and the cylinder center line D is set by 4° to 5° so that they intersect at the intersection P of the left and right outer sides of the outer periphery 11b of the cylinder part and are located upward near the bearing 3. Form it where you want.

Then, a short residual tillage treatment rotor 14 having a hollow cylindrical pipe portion 14a with residual tillage treatment claws 13 implanted on the outer periphery is formed, and the pipe portion is attached to the outer ring of the bearings 15, 15 fitted to the cylindrical shaft portion 11b. This residual tillage processing rotor 14 is configured such that the outer periphery of the fixed shaft 11 can freely rotate around the cylinder core line D by fitting the inner hole of 14a. The residual tillage processing claw 13 is allowed to pass on the outside of the drive chain case 1 above the mounting seat 10.

Then, the drive gear 16 is spline-fitted 7 to the rotary shaft 2 between the fixed shaft 11 and the rotary pipe 6, and the stay pipe 1 fitted into the rotary shaft 2
At 7, the distance between the inner ring of the bearing 3 and this drive gear 16 is maintained constant, and the pipe portion 14a
When the drive tooth 16a of the drive gear 16 rotates forward while the drive gear 16 meshes with the internal gear 18 formed in the
is configured so that it comes into contact with the tooth surface 18a of the internal gear 18, and when the rotary shaft 2 is rotated by a drive chain 20 wound around a sprocket foil fitted to the rotary shaft 2, the drive gear 16 is also rotated together with the rotary shaft 2. An internal gear 18 that meshes with this drive gear 16 is formed to rotate the residual tillage treatment rotor 14 around the cylinder core line D.

As shown in FIG. 3, the drive gear 16 has a tooth surface 16b of the drive tooth 16a that is arcuate when viewed from the side and from the tooth tip, that is, a spherical quadratic curved surface. However, as shown in FIG. 1, the front-rear center plane E-
As shown in FIG. 2, draw a pitch circle F with a pitch radius R centered on the midpoint M of the distance B between the shaft center line C and the cylinder center line D on E, and draw a pitch circle F with a pitch radius R as shown in FIG. Draw an arc with a pitch radius R centered on the intersection H of this pitch circle F with a virtual plane GG that forms 45 degrees in the circumferential direction of the circle F, and use this arc to locate the center of the tooth width of the drive tooth 16a. Tooth surface 16
b and the circular arc 16c of the tooth surface 18a of the internal gear, and the contact and meshing between the drive gear 16 and the internal gear 18 starts at the intersection H, and from this intersection H, the circumference of the pitch circle F Intersection I separated by 90° in the direction
The mesh is formed so that the engagement ends at .

When viewed from the side, the tooth surface 18a of the internal gear 18 is formed with the hit radius R, that is, the circular arc 16c, within the tooth width. It may be formed into A flexible seal 2 made of a flexible material such as rubber or synthetic resin is attached to the boss portion 16d of the drive gear 16 on the outside of the drive tooth 16a.
1, and by fitting the L-shaped outer circumferential fitting part 21a formed on the outer periphery of this flexible seal 21 to the outer end of the pipe part 14a, the drive shaft 16a and the internal gear 18 are The flexible seal 21 is fitted at a point P where the axis C of the rotary shaft 2 and the cylinder center line D of the cylinder shaft portion 11b intersect on the center side. It is configured to be located.

Then, a seal cover 2 formed of a thin metal plate
The inner hole of 2 is fitted onto the rotary pipe 6, and the outer periphery of the seal cover 22 is bent approximately at right angles along the flexible seal 21 and the outer end of the pipe portion 14a, and is formed on the outer periphery of the pipe portion 14a. Locking groove 14
The outer side of the flexible seal 21 is protected by engaging the comb-like locking portions 22a formed on the outer periphery of the seal cover 22 with the seal cover 22b.

Since the residual tillage processing device according to the present invention is configured as described above, if the drive chain 20 is rotated via the universal joint transmission mechanism by the rotational drive of the power take-off shaft of the power agricultural machine (not shown), the sprocket foil 1
The rotary shaft 2, which is a single unit with the rotary shaft 9, turns the main rotor 5, and plows the vicinity of the left and right outside of the lower part of the drive chain case 1 using the tilling claws 4.

Further, the drive gear 16, which simultaneously rotates together with the rotary shaft 2, has an internal gear 1 that constantly meshes with the drive teeth 16a.
8 is rotated around the cylindrical center line D that is inclined with respect to the horizontal axis C, so the residual tillage treatment rotor 14 is rotated around this cylindrical center line D.

As a result, the tip of the remaining tillage processing claw 13 of the remaining tillage processing rotor 14 passes below the drive chain case 1 when it is in the lower position, and the soil near this lower part is tilled. As the residual tillage processing claw 13 rotates upward, its tip can pass outside the drive chain case 1.

As the driving gear 16 and the internal gear 18 engage with each other, the tooth surfaces 16b and 18a slide against each other, and the driving gear 16 and the internal gear 18 perform a sliding movement centering on the intersection point P. tooth gear 1
The slippage of the tooth surfaces of No. 8 is much greater than that in the case of meshing with ordinary gears.

However, in this invention, the drive tooth 16a
Since the tooth surface 16b of the internal gear 18 is formed into a spherical quadratic curved surface, and the tooth surface 18a of the internal gear 18 is formed into an arc 16c in side view, the sliding of the tooth surfaces against each other is extremely smooth. Remaining tillage processing rotor 1
4 will rotate smoothly.

The tooth surfaces 16b and 18a in contact with each other are capable of transmitting sufficient driving torque to the residual tillage treatment rotor 14, and this invention, which uses only a gear mechanism, The cylindrical axis D of the processing rotor 14 is provided so as to intersect with the center side of the flexible seal 21 fitted to the outer end of the residual tillage processing rotor 14, and the drive gear 16 has a spherical tooth surface 16b of its drive teeth 16a. It is formed into a quadratic curved surface and extends over a predetermined rotation range in which the drive tooth 16a of the drive gear 16 rotates toward the front side of the rotary shaft 2 while the drive gear 16 and the internal gear 18 are in a loosely engaged state. Since the flexible seal 21 is configured to abut against the tooth surface 18a of the internal gear 18, the amount of deflection of the flexible seal 21 is reduced, and the durability of the flexible seal 21 can be improved. In the loosely engaged state with the toothed gear 18, the internal toothed gear 18
The tooth surface 18a contacts only within a predetermined rotation range, and all the tooth surfaces 16b and 18
a and are not always engaged as in the conventional technology,
Therefore, there is less wear on the tooth surfaces 16b and 18a, and the durability of the residual tillage treatment device can be improved.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional front view showing the main parts of the residual tillage processing device according to the present invention, Fig. 2 is a sectional view taken along the center plane EE in the longitudinal direction in Fig. 1, and Figs. 3 and 4 are respectively FIG. 2 is a perspective view of a drive gear and a pipe section used in the present invention. Description of symbols, 1... Drive chain case, 2... Rotary shaft, 3, 15... Bearing, 4... Tilling claw, 5...
Main rotor, 6...Rotary pipe, 7...Spline fitting, 8...Auxiliary rotor, 9, 12...Mounting bolt, 10...Mounting seat, 11...Fixed shaft, 11a...Mounting seat, 11b...Cylinder shaft portion, 13...Remaining Cultivated nails, 14...
Remaining tillage processing rotor, 14a...pipe part, 14b...
Locking groove, 16... Drive gear, 16a... Drive tooth, 16
b, 18a... tooth surface, 16c... side part, 16d... boss part, 17... stay pipe, 18... internal gear, 1
9... Sprocket foil, 20... Drive chain, 2
1... Flexible seal, 21a... Outer periphery fitting part, 22... Seal cover, 22a... Locking part, B... Spacing, C... Shaft center line, D... Cylinder center line, E-E... Front-rear direction center plane, F
... Pitch circle, G-G... Virtual plane, H, P, I... Intersection, M... Midpoint, R... Pitch radius, α... Intersection angle.

Claims (1)

[Claims] 1 The remaining tillage processing claws 13 of the remaining tillage processing rotor 14 on the rotary shaft 2 rotatably supported on the drive chain case 1 pass through the outside of the drive chain case 1 in the upper part and the drive chain case 1 in the lower part. The cylindrical core of this residual tillage processing rotor 14 is slightly tilted and pivotally supported with respect to the rotary shaft 2 so that it can rotate downwardly, and an internal gear 18 that meshes with a drive gear 16 attached to the rotary shaft 2 is left behind. In the tillage device installed in the tillage rotor 14, the axis C of the rotary shaft 2 and the cylindrical core line D of the left tillage rotor 14 are connected to the center side of the flexible seal 21 fitted to the outer end of the left tillage rotor 14. The drive gear 16 has a tooth surface 16b of the drive tooth 16a formed into a spherical quadratic curved surface, and when the drive gear 16 and the internal gear 18 are loosely engaged with each other, the drive gear 16 The tooth surface 18a of the internal gear 18 rotates over a predetermined rotation range in which the drive tooth 16a rotates toward the front side of the rotary shaft 2.
A residual tillage processing device characterized in that it is configured to come into contact with the tillage residue.