JP2600735Y2 - Wheel transmission structure of walking rice transplanter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel transmission structure for a walking rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as one form of a walking type rice transplanter, the front ends of a pair of left and right wheel transmission cases are interlockingly connected to the left and right side walls of a transmission section via a front bevel gear case, respectively. In some cases, the wheels are linked to each other via a rear bevel gear case.

[0003] A transmission shaft is mounted in the wheel transmission case, and a bevel gear is attached to each of the front and rear ends of the transmission shaft, and a front bevel gear connected to the wheel drive shaft of the transmission section is connected to the front bevel gear. While the output bevel gear in the case is meshed from the outside, the rear bevel gear is meshed from the inside with the input bevel gear in the rear bevel gear case linked to the axle, and the wheels attached to the axle are rotated. Have to be able to.

[0004]

However, in the above-described wheel transmission structure, the space between the output bevel gear and the wheels in the left-right width direction is increased, and the left-right width of the body is also increased. Had a problem.

[0005]

Therefore, in the present invention, the front ends of a pair of left and right wheel transmission cases are connected to the left and right side walls of the transmission section via a front bevel gear case, respectively. In a wheel transmission structure of a walking type rice transplanter in which wheels are interlocked and connected via a rear bevel gear case, a front end portion of an output shaft protruding from the transmission portion in the left-right width direction and protruding from the transmission portion is supported in the front bevel gear case, An output bevel gear is attached to the tip of the output shaft, and the output bevel gear is engaged with the bevel gear part of the bevel gear with front shaft from the inside, while wheels are attached to the tip in the rear bevel gear case, and left and right width directions are attached. The base end of the extending axle is supported, and an input bevel gear is attached to the base end of the axle. The bevel gear of the bevel gear with rear shaft is attached to the input bevel gear. A walk-behind rice transplanter characterized in that the transmission shaft is interposed from the side, a transmission shaft is interposed between the bevel gears with both shafts, and the transmission shaft is disposed inside the output bevel gear and outside the input bevel gear. The wheel transmission structure of the present invention is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

A shown in FIG. 1 is a walking type rice transplanter having the wheel transmission structure according to the present invention.
Has a motor unit 2 mounted on the front of the body k, and a mission unit 3 provided behind the motor unit k. The upper part of the motor unit 2 and the mission unit 3 is covered with a hood 1. The shaft case 4 extends rearward from the lower rear surface. 5 is a transmission mechanism, 19 is a spare seedling mounting table, and N is a spare seedling.

At the rear end of the shaft case 4, a planting mission case 6 is connected, and the planting mission case 6 is connected with a pair of right and left seedling planting mechanisms 21 and 21 and has a handle stay. The handle stay 7 is formed to extend rearward and upward, and handles 8, 8 branched to the right and left sides are attached to the upper end, and a seedling support frame 9 is provided in the middle of the handle stay 7. The seedling table 10 of low front and rear height on which seedling mats for two rows can be placed is continuously provided.

At the rear end of the shaft case 4, as shown in FIG. 1, a column 15 is erected upward and rearward, and an upper end of the column 15 and a seedling mounted immediately after the column 15 are provided. A traverse mechanism for traversing the seedling table 10 in the left-right width direction between it and the table 10
22 are interposed.

As shown in FIG. 1, a seedling vertical feed drive mechanism 20 is interposed between the horizontal feed mechanism 22 and the vertical seedling feed mechanism 23 attached to the lower rear wall of the seedling mounting table 10. ing.

On the left and right sides of the mission section 3, there is a wall shown in FIG.
As shown in FIG. 2, the front ends of a pair of left and right wheel transmission cases 11 and 11 are interlocked and connected to each other so as to be vertically swingable via front bevel gear cases 35 and 35.
The left and right wheels 12 and 12 are interlocked and connected to the rear end of the vehicle 1 via rear bevel gear cases 36 and 36, and a swing adjustment mechanism 24 is provided between the two wheel transmission cases 11 and 11. I have.

As shown in FIG. 1, a float 25 is attached to the body k directly below the body k via vertical links 26 and 27 so as to be able to move up and down. And swing the left and right wheels 12,12
The seedling planting mechanisms 21 and 21 allow the planting depth of the seedlings to be kept constant.

The swing adjusting mechanism 24 includes a hydraulic cylinder 28 for raising and lowering the wheel, which is mounted between the transmission 3 and the shaft case 4, and a swinging part whose middle part is attached to the cylinder body 28 a of the cylinder 28 so as to be able to swing back and forth. Moving arm 29 and swing arm
Interlocking rods 30, 30 interposed between the left and right ends of the right and left swing arms 13 and 13, and a swing arm 29, respectively.
And a swing hydraulic cylinder 37 attached to the front end of the cylinder body 28a.

In this manner, the hydraulic cylinder for raising and lowering the wheels
When the cylinder body 28a moves forward and backward along the piston rod 28b, the swing arm 29
Also move forward and backward and move the left and right wheel transmission cases 11 and 11 up and down via the left and right swing arms 13 and 13,
The wheels 12, 12 attached to the rear ends of the two-wheel transmission cases 11, 11 can be moved up and down.

When the swing hydraulic cylinder 37 expands and contracts, the swing arm 29 swings in the front and rear direction in conjunction therewith, and the left and right wheel transmission cases 11 and 11 are moved via the left and right swing arms 13 and 13. One is pivoted upward and the other is pivoted downward so that the wheels 12, 12 attached to the rear end of each wheel transmission case 11, 11 can be vertically moved up and down with respect to each other. I have.

In the above configuration, the gist of the present invention lies in the wheel transmission structure, which will be described below with reference to FIGS.

That is, as shown in FIG. 2, in the front bevel gear case 35, the front end portion of the output shaft 40, which extends horizontally from the transmission portion 3 in the left-right width direction and protrudes, is supported.
While attaching the output bevel gear 41 to the tip of the output shaft 40,
The transmission shaft 42a of the front bevel gear 42 is supported on the rear side of the front bevel gear case 35 in a state substantially orthogonal to the output shaft 40, and the bevel gear 42b of the front bevel gear 42 is inwardly mounted on the output bevel gear 41. More engaged. 43,44,45 are bearings, 46 is a connecting bolt, and 47 is an oil drain bolt.

The bevel gear 42 with a front shaft has a transmission shaft portion 42a and a bevel gear portion 42b integrally formed. The transmission shaft portion 42a is formed in a cylindrical shape, and a spline fitting recess is formed in the inner peripheral surface. 42c.

In the rear bevel gear case 36, a wheel 12 is mounted at the tip end, and an axle 50 extends horizontally in the left-right width direction.
The input bevel gear 51 is supported at the base end of the wheel 50.
On the other hand, the transmission shaft 52a of the rear bevel gear 52 with a rear shaft is supported on the front side of the rear bevel gear case 36 in a state substantially orthogonal to the axle 50, and the bevel gear 52 of the rear bevel gear 52 is mounted.
b is meshed with the input bevel gear 51 from the outside. 53, 54, 55 and 56 are bearings, and 57 is a drain bolt.

The rear shaft-mounted bevel gear 52 has a transmission shaft portion 52a and a bevel gear portion 52b formed integrally with each other. The transmission shaft portion 52a is formed to be solid, and a spline fitting projection is formed on the outer peripheral surface. 52c.

The wheel transmission case 11 includes a cylindrical case body 11a formed by extending in the front-rear direction and a case body 11a.
The front connecting portion 11b is connected to the rear side wall of the front bevel gear case 35, and the rear connecting portion 11c is connected to the rear bevel gear case 36. It is connected to the front side wall.

A transmission shaft 60 is inserted into the wheel transmission case 11. The transmission shaft 60 has a cylindrical transmission shaft main body 60a extending in the front-rear direction and a transmission transmission shaft main body 60a.
The front solid shaft part 60b attached to the front end of 60a and the transmission shaft body 6
0a and a rear hollow shaft portion 60c attached to the rear end of the front bevel gear 42, and a spline fitting convex portion 60d is formed on the outer peripheral surface of the front solid shaft portion 60b. It is spline-fitted to the shaft 42a.

Further, a spline fitting recess 60e is formed in the inner peripheral surface of the rear hollow shaft portion 60c, and a bevel gear with a rear shaft is provided.
52 is spline-fitted to the transmission shaft portion 52a.

As described above, in the present embodiment, the output bevel gear 41 in the front bevel gear case 35 is
While the bevel gear portion 42b of the rear bevel gear 52 is engaged with the input bevel gear 51 in the rear bevel gear case 36, the bevel gear portion 52b of the bevel gear 52 with the rear shaft is meshed with the transmission shaft portion 42a of each of the bevel gears 42, 52. , 52a are spline-fitted to the front solid shaft portion 60b and the rear hollow shaft portion 60c of the transmission shaft 60, respectively, so that the meshing strength of the bevel gear portions 42b, 52b can be improved, The backlash and the meshing with the bevel gears 41 and 51 meshing with them can be normally maintained, and the power transmission performance can be secured well.

[0025]

According to the present invention, the following effects can be obtained.

That is, in the front bevel gear case, the front end of the output shaft extending from the transmission portion in the left-right width direction is supported, and an output bevel gear is attached to the front end of the output shaft. While the bevel gear portion of the bevel gear with shaft is meshed from the inside, a wheel is attached to the tip in the rear bevel gear case, and the base end of the axle extending in the left-right width direction is supported, and the base end of the axle is An input bevel gear is attached to the input bevel gear, the bevel gear part of the bevel gear with a rear shaft is meshed with the input bevel gear from the outside, a transmission shaft is interposed between the bevel gears with both shafts, and the transmission shaft is placed inside the output bevel gear. Also, since the transmission shaft and the input bevel gear are disposed outside the input bevel gear, the transmission shaft and the input bevel gear can be disposed between the transmission section and the output bevel gear. And Deployment unit is close to the lateral width direction can be arranged.

As a result, the left and right width of the body can be reduced, and the body can be made more compact.

[Brief description of the drawings]

FIG. 1 is a side view of a walking rice transplanter having a wheel transmission structure according to the present invention.

FIG. 2 is a sectional plan view of the main part.

[Explanation of symbols]

 A Walking type rice transplanter 11 Wheel transmission case 12 Wheels 35 Front bevel gear case 36 Rear bevel gear case 42 Bevel gear with front shaft 52 Bevel gear with rear shaft

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01C 11/02 B60K 17/04

Claims (1)

(57) [Scope of request for utility model registration] The front ends of a pair of left and right wheel transmission cases (11) and (11) are operatively connected to left and right side walls of a transmission section (3) via front bevel gear cases (35) and (35) , respectively. (11) In the wheel transmission structure of a walk-behind rice transplanter in which wheels (50) and (50) are interlockingly connected to the rear end of the walk-behind rice transplanter via rear bevel gear cases (36) and (36) , respectively, the front bevel gear case (35 ) , From the mission section (3)
Extend the end of the output shaft (40) that extends and
Support the output bevel gear (41) at the end of the output shaft (40).
Bevel gear with front shaft (4)
While the bevel gear portion (42b) of (2) is meshed from the inside , the wheel (12) is attached to the tip of the rear bevel gear case (36).
And the base end of the axle (50) extending in the width direction
And attach the input bevel gear (51) to the base end of the axle (50),
Bevel gear (52) with rear shaft is attached to the input bevel gear (51).
When the bell gear part (52b) meshes from the outside and the transmission shaft (60) is interposed between the bevel gears (42) and (52) with both shafts
In both cases, the transmission shaft (60) is located inside the output bevel gear (41),
A wheel transmission structure for a walking rice transplanter, wherein the wheel transmission structure is arranged outside the input bevel gear (51) .