JPH078005A - Rotary tillage device with residual tillage claw - Google Patents

Abstract

PURPOSE:To reduce the overall size of a rotary tiller by shortening the axial length of an inclined tine shaft. CONSTITUTION:A gear 15 to transmit power from a horizontal tilling shaft 13 to an inclined tine shaft 14, a bearing 16 to support the inclined tine shaft 14 in a state rotatable relative to a rotary case 7 and a sealing member 17 to inhibit the intrusion of mud water from the outer circumference of the inclined tine shaft 14 into the bearing 16 are arranged on the same rotary surface (s) of the inclined tine shaft 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tiller such as a management machine or a tiller, and more particularly to a rotary tiller equipped with a residual tillage processing claw capable of treating residual tillage at a lower portion of a rotary case.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Laid-Open No. 4-49902, a rotary tiller with a residual tillage treatment claw horizontally supports a tiller shaft at the lower part of a rotary case and also at the outer periphery of the base of the tiller shaft. An inclined pawl shaft equipped with a residual tillage treatment pawl is externally fitted so as to be relatively rotatable.

[0003]

In a conventional rotary tiller with a residual tillage treatment claw, a gear portion for transmitting power from a horizontal tillage shaft to an inclined pawl shaft and an inclined pawl shaft are rotated relative to a horizontal tiller shaft. Since the bearing that freely supports and the sealing member that prevents the muddy water from entering the bearing from the outer periphery of the inclined claw shaft are provided with the position shifted in the axial direction, the shaft of the inclined claw shaft is provided. The length in the core direction becomes long, and further, the horizontal width of the entire rotary tiller becomes large, making it unsuitable for a small management machine or a tiller.

An object of the present invention is to reduce the lateral width of a rotary tiller by downsizing the inclined pawl shaft in the axial direction by devising the arrangement of each member such as a bearing and a seal member. .

[0005]

The characteristic structure of the present invention for achieving the above object is to horizontally support a cultivating shaft at the lower part of a rotary case, and at the outer periphery of the base of the cultivating shaft.
In a rotary cultivating apparatus with a residual tillage treatment claw equipped with a residual tillage treatment nail for treating residual tillage at the lower part of a rotary case, a gear for transmitting power from the horizontal tillage shaft to the inclined nail shaft Part, a bearing for supporting the inclined claw shaft relatively rotatably with respect to the rotary case, and a sealing member for preventing muddy water from entering the bearing from the outer peripheral part of the inclined claw shaft are provided on the same rotation surface of the inclined claw shaft. It is at the point placed above.

[0006]

[Function] A gear portion for transmitting power from the horizontal tillage shaft to the inclined pawl shaft, a bearing for supporting the inclined pawl shaft relatively rotatably with respect to the rotary case, and muddy water entering the bearing from the outer periphery of the inclined pawl shaft. By arranging the seal member for preventing the above-mentioned operation on the same rotation surface of the inclined pawl shaft, the axial direction of the inclined pawl shaft can be made compact.

[0007]

As a result of the above construction, the gear portion for transmitting power from the horizontal tillage shaft to the inclined pawl shaft, the bearing for supporting the inclined pawl shaft so as to be rotatable relative to the rotary case, and the outer periphery of the inclined pawl shaft. From the above, it is possible to make the slanted claw shaft compact in the axial direction by a simple structural improvement of the arrangement position of the seal member for preventing the intrusion of muddy water into the bearing, and further, the lateral width of the entire rotary tillage is compact. The rotary tiller with a residual tillage treatment claw can be applied to small management machines and tillers.

[0008]

Embodiments of the present invention will be described below with reference to a walk-behind management machine.

As shown in FIG. 4, an engine 1, a traveling mission case 3 equipped with traveling wheels 2, and a steering handle 4 are provided.
A rotary tiller R is connected to the rear part of the traveling machine body A including the above-described components to form a walking type management machine.

The power from the engine 1 is transmitted to the gear transmission in the traveling mission case 3 via the belt transmission 5, and the rotary transmission is transmitted from the traveling transmission case 3 to the gear transmission in the auxiliary chain case 6. It is adapted to be transmitted to the shaft transmission device in the case 7.

The rotary case 7 has a cylindrical case 7 in which an upper gear case 7a and a lower gear case 7c are vertical.
As shown in FIG. 2, the vertical shaft 11 in the cylindrical case 7b is connected to the input shaft 8 mounted on the upper gear case 7a through the rotary clutch 9 and the bevel gear mechanism 10 as shown in FIG. As shown in FIG. 1, it is transmitted from the vertical axis 11 to the cultivating shaft 13 mounted on the lower gear case 7c via the bevel gear mechanism 12 as shown in FIG.

A pawl shaft 13b equipped with a plowing pawl 13a is externally fitted and fixed to the end of the plowing shaft 13 protruding from the rotary case 7, and the rotary case 7 is attached to the outer periphery of the base of the plowing shaft 13.
An inclined pawl shaft 14 equipped with a bottom tillage treatment claw 14a for treating bottom tillage is externally fitted.

The inclined pawl shaft 14 is the horizontal tiller shaft 13.
To the ball-type occlusal portion 15 as a gear portion, that is, the recessed portions 13c formed on the outer peripheral surface of the cultivating shaft 13 at predetermined circumferential intervals, and the balls 15a internally provided, and the inner surface of the inclined claw shaft 14 at predetermined circumferential intervals Tooth part 1 for ball engagement formed on the
Power is transmitted through the lower gear case 7c via a bush 16 as a bearing, which is thinner in the radial direction than the ball bearing.
It is fitted in the boss portion 7d of the above so as to be relatively rotatable.

A seal member 17 is provided on the outer periphery of the boss portion 7d of the lower gear case 7c to prevent muddy water from entering the bush 16 from the outer peripheral portion of the inclined pawl shaft 14.

On the outer end side of the inclined claw shaft 14, the cultivating shaft 13 is attached.
A seal member 18 that is elastically displaceable is provided between the outer peripheral surface of the tilting claw shaft 14 and the inner peripheral surface of the tilting claw shaft 14, and the tilting claw shaft 14 is tilted while allowing relative displacement with the tiller shaft 13 as the claw shaft 14 rotates. It is configured to prevent muddy water from entering the inside from the inner peripheral portion of the pawl shaft 14.

The boss portion 7d of the lower gear case 7c is formed such that the outer end thereof is inclined downward, and the inclination axis X ₂ thereof intersects with the horizontal axis X ₁ of the tiller shaft 13 at the gear portion 15. It is supposed to do.

Then, the cultivating shaft 13 to the inclined claw shaft 14
Bearing 1 that supports a gear portion 15 that transmits power to the rotary case 7 and a gear portion 15 that transmits power to the rotary case 7.
6, and from the outer peripheral portion of the inclined pawl shaft 14 to the bearing 16
A sealing member 17 for preventing the intrusion of muddy water is placed on the rotating surface s of the inclined claw shaft 14 where the inclined axis X ₂ of the inclined claw shaft 14 and the horizontal axis X ₁ of the tiller shaft 13 intersect. It is set up.

As shown in FIG. 3, the pawl clutch 9a of the rotary clutch 9 is composed of a reverse-tapered pawl clutch which is hard to come off even if the clutch is disengaged.
The clutch operating arm 19 is linked with a wire 21 linked to the operating lever via a spring 20 for accommodation, and when the rotary clutch 9 is disengaged after the rotary clutch 9 is disengaged at the time of turning the body at the edge, That is, when the load acting on the rotary cultivator R is removed, the power is cut off by the urging force of the spring 20.

[Other Embodiment] As a bearing for supporting the inclined claw shaft 14 so as to be rotatable relative to the rotary case 7,
Instead of the bush 16 of the sliding bearing, a rolling bearing such as a needle bearing having a small diameter may be used.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1] Vertical rear view of the lower part of the rotary case

[Fig. 2] Vertical rear view of the upper part of the rotary case

FIG. 3 is a cross sectional view showing a part of a rotary clutch.

[Fig. 4] Overall side view

[Explanation of symbols]

 7 Rotary Case 13 Tillage Shaft 14 Inclined Claw Shaft 14a Remaining Plowing Treatment Claw 15 Gear Part 16 Bearing 17 Sealing Member s Rotating Surface

Claims (1)

[Claims] 1. A cultivating shaft (13) is horizontally supported on a lower portion of a rotary case (7), and the cultivating shaft (1) is supported.
An inclined claw shaft (1) equipped with a residual tillage treatment claw (14a) for treating residual tillage at the lower part of the rotary case (7) on the outer periphery of the base of (3).
4) The rotary tiller with a residual tillage treatment claw which is externally fitted to the horizontal tiller shaft (13) to the inclined claw shaft (1).
4) a gear part (15) for transmitting power to the inclined claw shaft (1)
4) a bearing (16) that rotatably supports the rotary case (7), and a seal member that prevents muddy water from entering the bearing (16) from the outer peripheral portion of the inclined claw shaft (14). A rotary tiller with a residual tillage treatment claw, wherein (17) is arranged on the same rotation surface (s) of the inclined claw shaft (14).