JPH0623201Y2 - Tillage equipment - Google Patents

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to a drive mechanism for a tillage pawl shaft in a rotary tiller.

(B) Conventional Technology In the conventional rotary cultivating apparatus, a technology in which a joint shaft and a bevel gear case are used in a portion for driving the cultivating pawl shaft from the cultivating drive shaft in the main beam has been known.

For example, it is as in JP-A-60-14001.

(C) Problems to be solved by the invention However, in the conventional technology, the portion of the drive bevel gear case formed on the outside of the tilling side plate becomes large, and the drive bevel gear case sinks into the soil to form a groove in the tillage trace. In addition, since the bottom surface of the drive bevel gear case is dragged with the soil in a frictional state, it is worn and the lubricating oil spills out.

The present invention solves such a conventional problem.

(D) Means for Solving the Problems The purpose of the present invention is as described above, and the configuration for achieving the purpose will be described below.

The power from the cultivating drive shaft 30 is transmitted to the bevel gear shaft 6,
In a structure in which the plowing pawl shaft 7 is driven from the bevel gear shaft 6 via the bevel gears 17 and 18, the bevel gear shaft 6 is arranged outside the plowing side plate 10, and the bevel gear shaft 6 is closer to the plowing drive shaft 30 side than the bevel gear 17. The bearing is supported only by the cultivating claw shaft 7, and the outer side of the bevel gear 18 is the bearing 60.
And the bearing 60 is positioned closer to the cultivating side plate 10 than the extension line of the axis of the bevel gear shaft 6, and the corner portion of the drive bevel gear case 4 is formed in a missing shape.

(E) Embodiment The purpose and construction of the present invention are as described above. Next, the construction of the embodiment shown in the accompanying drawings will be described.

Fig. 1 is an overall side view of a two-axis cultivator in a roughing work state, Fig. 2 is an entire side view of a scraping work state, and Fig. 3 is 2
FIG. 4 is a developed sectional view of the branch mission case 2, FIG. 5 is a side sectional view of the branch mission case 2, and FIG. 6 is a drive bevel gear case 4
7 is a side sectional view of the joint shaft 8.

The overall structure will be described with reference to FIGS. 1, 2, and 3.

2 of the present invention for a three-point link type working machine mounting device of a tractor
A shaft-type tiller is attached and it is moved up and down by a hydraulic lifting device on the tractor side.

In the case of FIG. 1, it is in a rough working state, the rear wheel 56 of the tractor is not so much buried, and the two-axis cultivator is not in the forward leaning posture, but as shown in FIG. Then, since the rear wheel 56 of the tractor is buried in the mud, the two-axis cultivator is in the forward leaning posture, and in this state, the second wheel
The part of the axial tilling claw 12 is also lowered to a lower position by the rotation adjusting handle 47 so that it can be grounded on the field scene.

A universal joint is inserted from the PTO shaft on the tractor side toward the bevel gear box 57 on the two-axis cultivator side to transmit power.

The cultivating drive shaft 30 is arranged inside the left side of the main beams 31, 31 extending to the left and right of the bevel gear box 57, and power is transmitted to the branch transmission case 2 provided at the left end of the main beam 31. Further, the cultivating drive shaft 30 projects through the branch mission case 2 and transmits power to the uniaxial cultivating case 1 rotatably supported on the left side surface of the branch mission case 2.

The speed of the second tillage shaft 11 is changed in the branch mission case 2, and the power is transmitted to the bevel gear shaft 29 in the bevel gear case 2c. Power is transmitted from the shaft 29 to the bevel gear shaft 6 of the drive bevel gear case 4 via the joint shaft 8.

The bevel gear device in the drive bevel gear case 4 changes the rotation in the horizontal axis direction again to drive the tillage pawl shaft 7,
The second tillage shaft 11 attached to the tiller claw shaft 7 is rotated. A second shaft tilling claw 12 is planted on the second tilling shaft 11.

Further, the rotation in the uniaxial cultivating case 1 is transmitted to the first cultivating shaft 55 provided with the first cultivating claw 51 by the chain.

The upper periphery of the first shaft tilling claw 51 is covered with the uniaxial tilling cover 48, and the upper part of the second shaft tilling claw 12 is covered at the two shaft tilling cover 5.
A rear cover 49 is rotatably supported on the rear portion of the biaxial tillage cover 50.

As described above, since the uniaxial cultivating case 1 is rotatable around the end of the branch mission case 2, the branch mission case 2 does not rotate, but the uniaxial cultivating case 1 and the first
The cultivating shaft 55 and the second cultivating shaft 11 are uniaxial cultivating covers 4
8 and 2 axis tillage cover 50, tiller side plate 10 and 1 axis tiller side plate 58 are integrated, and rotate from the state of FIG. 1 to the state of FIG. 2 around the tiller drive shaft 30 in the main beam 31. It is supposed to be adjustable.

A rotation adjusting handle 47 is used to adjust the rotation around the cultivating drive shaft 30. A front end of an adjusting screw 52 rotated by the rotation adjusting handle 47 is pivotally supported by a bevel gear box 57, and a rear end thereof is pivotally supported by a bracket above an uniaxial tilling cover 48.

The two-axis cultivating cover 50, the cultivating side plate 10, the second cultivating shaft 11, and the two-axis drive mission case 4 are configured to be detachable with one touch with respect to the uniaxial cultivating device, and the two-axis cultivating device is removed. In this case, the rear cover 49 can be attached to the rear portion of the uniaxial tillage cover 48 as it is.

Further, the rotation of the first shaft tilling claw 51 is counterclockwise, the rotation of the second shaft tilling claw 12 is clockwise, and since the mud adheres to the upper part between the two, the biaxial tiller cover of the part. Fifty
A soil adhesion preventing plate 9 is attached under the.

Next, the internal structure of the branch mission case 2 will be described with reference to FIGS.

The branch mission case 2 is fixed to the left end of the main beam 31 discharged right and left from the bevel gear box 57, and the uniaxial cultivating case 1 is rotatably supported on the left side of the branch mission case 2. There is.

The branch mission case 2 is composed of a case body 2a, a case lid 2b, and a bevel gear case 2c.

The double sliding gears 33, 34 are arranged on the tilling drive shaft 30 penetrating the inside of the branch mission case 2, and the double sliding gears 33, 34 are slid by the speed change lever 28 to reduce the height.
Shifting to the gear and neutral position.

The double sliding gears 33, 34 are selectively meshed with the fixed gears 35, 36 on the counter shaft 46, and the fixed gear 35 is always meshed with the loose fitting gear 38 on the two-shaft driven shaft 37.

A loose fitting gear 38 and a ball engaging disc 41 on the two-axis driven shaft 37.
A clutch ball 39 is interposed between the above and a torque limiter.

The ball engaging disc 41 is attached to the ball fitting portion 3 of the loose fitting gear 38.
The spring receiving plates 42 and 45, the spring receiving bearing 43, and the urging spring 44 are interposed so as to press against the 8a.

The torque limiter is configured to cut off power transmission when the second tillage shaft 11 is overloaded.

A bevel gear 59 is fixed to a portion where the end of the biaxial driven shaft 37 projects into the bevel gear case 2c, and the bevel gear 59 meshes with a bevel gear 60 on the bevel gear shaft 29.

A joint shaft 8 is interposed between the bevel gear shaft 29 and the bevel gear shaft 6 shown in FIG.

Next, the structure of the drive bevel gear case 4 will be described with reference to FIG.

The drive bevel gear case 4 is fixed to the cultivating side plate 10.

The drive bevel gear case 4 comprises a case body 4a.
A bearing lid 4b and a fixed lid 4c. The bevel gear shaft 6 is supported by the two bearings 15 and 16 arranged in the bearing lid 4b. And the bearings 15 and 16
Thus, the bevel gear shaft 6 is substantially in a cantilevered supporting state. The bearings 15 and 16 are concentrated on the joint shaft 8 side with respect to the bevel gear 17, and there is no bearing at a position below the bevel gear 17. With this configuration, the lower corner portion of the drive bevel gear case 4 has a missing shape.

Even if the bearing portion at the lower end of the bevel gear shaft 6 is eliminated, if the outer bearing portion of the tillage pawl shaft 7 is configured to be large, it is impossible to eliminate the corner portion.

In the present invention, the bearing outside the plowing pawl shaft 7 is a small bearing 60 made of metal, and the bearing 60 is also arranged closer to the plowing side plate 10 than the axis extension line of the bevel gear shaft 6 for driving. The corners of the bevel gear case 4 can be omitted.

A bevel gear 17 is fixedly installed at the lower end of the bevel gear shaft 6,
The bevel gear 17 is a bevel gear 18 at the outer end of the tillage claw shaft 7.
Meshes with.

The cultivating claw shaft 7 constitutes an intermediate shaft for fixing the second cultivating shaft 11, and a flange 13 is fixedly provided on the inner shaft end portion of the cultivating side plate 10.

Further, the flange 13 and the flange 14 at the end of the second tillage shaft 11 are fixed by bolts.
The anti-winding plate 5 is sandwiched between 14 and fixed.

The winding prevention plate 5 has a narrow gap between it and the fixed-side winding prevention plate 19 that protrudes inward from the cultivating side plate 10 to prevent winding of straw or the like.

FIG. 7 is a side sectional view of the joint shaft 8.

The joint shaft 8 has a central double shaft portion which is capable of expanding and contracting a portion 8a.
And the both ends are the universal portions 8b.

According to the present invention, the amount of expansion and contraction of the expandable part 8a is increased, and the inclination angle of the universal part 8b can be increased.

(F) Other Embodiments As shown in FIG. 6, the bearing bead 4b of the drive bevel gear case 4 is formed separately from the case body 4a, and two bearings 15 are provided at the bearing lid 4b. The bearing 16 and the bevel gear shaft 6 are supported first, and the bevel gear shaft 6 and the bevel gear shaft 6 are configured to be fitted into the case body 4a in the semi-mechanical state.

With this configuration as well, the bearing support portion of the bevel gear shaft 6 has a cantilevered support structure so that the bevel gear case 6 does not have to project below the drive bevel gear case 4.

Further, a winding prevention plate 5 is sandwiched between a flange 13 attached to the tilling claw shaft 7 and a flange 14 attached to the second tilling shaft 11, and the winding prevention plate 5 rotates together with the tilling claw shaft 7, Since the winding prevention plate 5 is rotated in the fixed-side winding prevention plate 19,
It is possible to prevent wrapping of straw and weeds around the second tillage axis 11.

Especially, the winding prevention plate 5 is rotating, and the fixed side winding prevention plate 1
Since 9 is fixed, it is possible to cut the straw or the like that is about to be wound between the two.

(G) Effect of the Invention Since the present invention is configured as described above, it has the following effects.

First, when trying to drive the plowing pawl shaft via the driving bevel gear case, the upper and lower support bearings of the bevel gear shaft inevitably project, and the lower end of the driving bevel gear case swells into the plowing soil. It fills up and creates a groove.

On the other hand, in the present invention, the bearing at the lower end of the bevel gear shaft 6 on the input side to the drive bevel gear case 4 is abolished, and the bearing is arranged above the bevel gear 17 for substantially cantilevered support. The lower corner of the drive bevel gear case 4 can be omitted, and as a result, it is possible to prevent a groove from being formed in the cultivated soil.

Secondly, if the output side shaft of the tilling claw shaft 7 is also cantilevered, both the bevel gears 17 and 18 are cantilevered and the meshing state becomes unstable. The side of the plowing claw shaft 7 is supported by a small bearing on both sides, so that the meshing state of the bevel gear can be ensured, and the small bearing 60 is placed inside the extension line of the bevel gear shaft 6. As a result, the missing portion of the corner of the drive bevel gear case 4 can be secured.

[Brief description of drawings]

Fig. 1 is an overall side view of a two-axis cultivator in a roughing work state, Fig. 2 is an entire side view of a scraping work state, and Fig. 3 is 2
FIG. 4 is a developed sectional view of the branch mission case 2, FIG. 5 is a side sectional view of the branch mission case 2, and FIG. 6 is a drive bevel gear case 4
7 is a side sectional view of the joint shaft 8. 4 ... Drive bevel gear case 6 ... Bevel gear shaft 7 ... Tilling pawl shaft 15,16 ... Bearing 17,18 ... Bevel gear 30 ... Tilling drive shaft 60 ... Bearing

Claims (1)

[Scope of utility model registration request] 1. In a structure in which power from a tilling drive shaft is transmitted to a bevel gear shaft 6 and the bevel gear shaft 6 drives a tiller claw shaft 7 via bevel gears 17 and 18, the bevel gear shaft 6 is mounted on a tiller side plate 10. The bevel gear shaft 6 is disposed on the outer side, and the bearing is supported only on the side of the cultivating drive shaft 30 with respect to the bevel gear 17, and the cultivating pawl shaft 7 is rotatably supported on the outer side of the bevel gear 18 by the bearing 60. The cultivating device is characterized in that it is located closer to the cultivating side plate 10 than the extension line of the shaft center, and the corners of the drive bevel gear case 4 have a missing shape.