JPS63317010A - Rotary cultivator - Google Patents

Abstract

PURPOSE:To prevent water and dust from acting on the seals and increase the corrosive resistance of the cultivator by connecting integrally the shaft cover to the flange cover which covers the connected part of the bearing holder and the transmission case. CONSTITUTION:Flange 22 is formed at the inlet opening of the level gear case 10a and the flange 22 is connected to the flange part of the bearing holder 10b by licking them through a seal with the bolt 25. The connection part is covered at its upper half with a circular flange cover 23 and fixed with the bolt 25. Further, the upper half of the power shaft 11 is covered with the shaft cover 24 along the front internal edge of the flange cover 23. Thus, the seal of the connected part is protected from damaging or deteriorating in an early period of time by rain water and dust.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention includes an input shaft projecting outward from a transmission case, a bearing holder that supports the input shaft, and the transmission case connected by flange connection. The present invention relates to a rotary tiller, in which an upper part of the input shaft is covered with a shaft cover.

[Conventional technology]

In this type of rotary tiller, a bearing holder that supports an input shaft is connected by flange to the input-side open end of a molded transmission case to constitute an outer shell portion of the input section. In addition, in order to protect the connecting part of the input shaft from rainwater and dust, a shaft cover that covers the upper part of the input shaft is attached to the bearing holder in a cantilevered manner (Utility Model No. 6147
Publication No. 154).

[Problem that the invention seeks to solve]

However, with the rotary tiller device cited above,
Since the joint between the bearing holder and the transmission case is exposed to the outside, it is often exposed to rainwater and dust, and the seal provided at the joint may be damaged or deteriorated in a relatively short period of time. It was easy.

The present invention was developed in view of these circumstances, and its purpose is to eliminate the adverse effects of rainwater and dust on the joint between the bearing holder and the transmission case.

[Means for solving problems]

A feature of the present invention is that the shaft cover is integrally provided with a flange cover portion that covers the joint between the bearing holder and the transmission case, and its functions and effects are as follows.

[For production]

In other words, the flange cover part integrally connected to the shaft cover covers the joint between the bearing holder and the transmission case to prevent water and dust from acting on the seal.

〔Effect of the invention〕

As a result, the seals at the joints are highly resistant to corrosion by preventing early damage or deterioration due to the effects of rainwater and dust.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Figure 5, there is a door blind (
1) and a low tillage device (4) via a link mechanism (3) consisting of a pair of left and right lower links (2),
In addition, a pair of left and right lift arms (6), which can be driven and moved up and down by a hydraulic cylinder (5), and a pair of left and right lower links (2) are connected via a lift rod (7), and the hydraulic cylinder (5) ), the rotary tiller (4) is configured to be able to be raised and lowered with respect to the traveling machine body, and a power take-off shaft (9) protruding rearward from the rear of the traveling machine body and an input of the rotary tiller (4) are configured. An input shaft (11) protruding forward from the case (lO) is interlocked and connected via a transmission shaft (12) equipped with a universal joint, thereby constructing a riding type cultivator.

To explain the low tillage device (4), the fourth
As shown in the figure, there are vibrator-type support arms (13A) on the left and right side surfaces of the input case (10).

(13B) and fix the right support arm (13B) respectively.
A side frame (14) is fixed to the tip of the left support arm (13A), and a chain case (15) is fixed to the tip of the left support arm (13A).
) and the lower part of the chain case (15). Furthermore, a bevel gear shaft (
Insert one end of the input shaft (17) into the input case (10).
) with a bevel connection, while the other end is connected with a chain case (15
) is connected to the tilling claw shaft (16) by a chain, and is configured as a side drive type.

Inside the input case (10), as shown in FIG. 1, two driven hevel gears (18A) and (18B) are loosely fitted to the hevel gear shaft (17), and these driven hevel gears (18A), (18B) to the input shaft (11)
They are respectively engaged with a driving bevel gear (19) fixed to the rear end of the drive bevel gear (19). Furthermore, two driven bevel gears (1
The bevel gear shaft located between (8A) and (18B)
17) A spline (17a) is formed on the spline (17a), and the shift gear (20) is fitted onto the spline (17a).As the shift gear (20) slides in the axial direction, the driven beher gear ( 18A) and (18B) so that the driving force of the driving bevel gear (19) is transmitted to the bevel gear shaft (17) via the driven bevel gear (188 or 18B) and the shift gear (20). be.

Furthermore, a driven bevel gear (18A) that engages by changing the sliding direction of the shift gear (20);
(18B) to change the direction of the driving force transmitted to the bevel gear shaft (17), a so-called forward/reverse switching device (21) is configured.

The input case (10) has a driven bevel gear (18A
), (18B) as a transmission case, and a split bearing holder (10b) that supports the input shaft (11). In detail, Hebel gear case (
A flange (22) is formed at the input side opening end of 10a),
A bearing holder (fob) is attached to this flange (22).
The flanges are connected by tightening bolts (25) through seals, and in order to protect the joint from water and dust, the upper half of the joint is covered with an arc-shaped flange cover (23). , said bolt (25
). Furthermore, this flange cover part (2
3) A protective shaft cover (24) surrounding the upper half of the input shaft (11) is provided along the front inner edge.

As shown in FIG. 3, the shaft cover (24) is divided into left and right parts along the front-rear line, and the left cover (24A) is fixed to the flange cover part (23), and the right cover (24A) is fixed to the flange cover part (23).
24B) is hingedly connected to the left cover (24A) so that it can swing open and close about the dividing line. Also,
As shown in FIG. 2, a horizontally long guide hole (27) is bored in the front part of the left fixed side cover (24A), and the forward/reverse switching device (21) is inserted through this guide hole (27). The operation lever (26) is directed upward and penetrated.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of a rotary tillage device according to the present invention,
Figure 1 is a cross-sectional plan view of the transmission case and bearing holder, Figure 2 is a longitudinal side view of the same, Figure 3 is a perspective view of the same, Figure 4 is a plan view, and Figure 5 is a side view showing how it is installed on the aircraft. It is a diagram. (10A female...Transmission case, (10b)...
... Hair ring holder, (11) ... Input shaft, (24) ... Shaft cover.

Claims (1)

[Claims] An input shaft (11) is made to protrude outward from a transmission case (10a), and a bearing holder (10b) that supports this input shaft (11) and the transmission case (10a) are connected by flange connection, and the input shaft In a rotary tiller in which the upper part of (11) is covered with a shaft cover (24), a bearing holder (10) is attached to the shaft cover (24).
b) A rotary tiller in which a flange cover part (23) covering the joint part of the transmission case (10a) is integrally connected.