JP2549857Y2 - Rotary cover rotating device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary device for rotating a rotary cover in a rotary tilling device.

[0002]

2. Description of the Related Art Conventionally, a technique related to a rotary device of a rotary cover in a rotary tilling apparatus is known, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 1-285103. In this technology, guide pieces are provided on both upper surfaces of a rotary cover in the front-rear direction, the guide pieces are sandwiched by guide rollers from above and below, and the guide rollers are provided at frame ends protruding from both sides of the gear case, and a rotary cover is provided. It was configured to be able to rotate in the front-back direction.

[0003]

However, in the prior art, a pair of guide rollers must be provided on the upper and lower surfaces in order to hold the guide piece from the upper and lower surfaces. In order to provide a retaining structure without impairing the rotational movement of the guide roller itself in this configuration, it must be fixed to the side member fixed to the end of the support pipe with a bolt or the like via a collar having an edge on one side. You have to. At this time, if there is not sufficient clearance in the lateral direction of the guide roller, the rotational movement of the roller itself cannot be expected, and the guide roller always holds the guide piece from the upper and lower surfaces to prevent the guide piece from falling off in the horizontal direction. Since the guide roller is required, the guide roller has a shape in which both edges are raised so that the guide piece can be held in the central concave portion. Also, in this case, if there is not sufficient clearance in the lateral direction between the guide roller recess and the guide piece, the rotational movement of the guide roller itself is hindered and smooth rotation cannot be expected. However, the above two clearances that are indispensable for smooth rotation cause backlash in the rolling parts at the same time, which can cause a serious hindrance to the workability of the rotary. There is a method in which the guide piece is interposed to restrict the backlash, but there is a serious defect that not only the structure is complicated but also the smooth rotation is impaired.

Further, during the tilling, a load such as vibration, impact or torsion is constantly applied to the rotary cover, which hinders smooth rotation. There is a method in which the guide roller is made independent via an elastic body, but in this method, even if the guide roller is formed of an elastic body, a guide piece is formed in the concave portion, so that a twisting force is applied to the rotary cover and the roller edge receives a load. Therefore, it is difficult to form the elastic member. Next, in the method of fixing the guide piece to the rotary cover via the elastic bush, vibration and impact can be reduced, but the torsion is subjected to a load on the roller edge as described above, Even if the rollers are not elastic, rolling of the rollers cannot be expected. The present invention is intended to solve the above-mentioned problems, to simplify the structure and to facilitate the assembly, and to further improve the strength and accuracy.

[0005]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. Rotary cover can be rotated with respect to machine frame
In the configured rotary tilling device, the rotary cover
And a recess with a substantially U-shaped cross section
Guide rail that opens in the direction
On the left and right sides of the tally cover, recesses with a substantially U-shaped cross section are opposed.
In the same direction or in the opposite direction.
On the other side of the bar and machine frame,
Fits a guide bush made of an elastic material with a small coefficient of friction
Guide rail support member facing the guide rail
The length of the guide bush and the pin is
The guide bush is located on the inner surface of the U-shaped
At the position where the tip abuts, the pin is the back surface of the U-shaped recess.
Short so that it does not touch the
Contact between the upper and lower edges and the side material supporting the guide bush
It is set to a length that keeps the interval without touching .

[0006]

The operation of the present invention will be described. The guide bush 6 is formed into a U-shaped guide rail 5 by a pin 4a.
The guide rail 5 is only fitted in the guide rail 5.
The guide bush 6 does not come off from the pin 4a because the concave portion 5a and the fitting portion 4b of the pin 4a face each other. Also, guide bush 6
Is longer than the length of the pin 4a protruding from the side member 4 and the depth of the guide rail 5, so that the bottom surface of the guide rail 5 does not contact the pin 4a and both edges of the guide rail 5 and the side member 4. . Next, when the shape of the guide bush 6 is made cylindrical as shown in FIG. 6A, a smooth rolling motion is performed on the upward or downward surface in the guide rail 5. Further, since the length of the guide bush 6 is defined as described above for the lateral force, the smooth rotation of the rotary cover 1 is not hindered. As described above, the rotary cover 1 can always smoothly rotate through the guide bush 6 having a small friction coefficient.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems to be solved and means to be solved of the present invention are as described above. Next, the specific structure of the present invention will be described with reference to the accompanying drawings. 1 is a perspective view of a rotary tillage device, FIG. 2 is a rear cross-sectional view of a rotary cover support, FIG. 3 is a cross-sectional view showing a second embodiment, and FIG. 4 is a cross-sectional view showing a third embodiment. 5 is a sectional view showing the fourth embodiment, and FIG. 6 is an enlarged side view of the guide bush.

1 and 2, the configuration of the present invention will be described. A gear case 2 is disposed at the center of the upper surface of the rotary cover 1 of the rotary tilling apparatus A, and side members 4.4 are fixed to ends of support pipes 3 attached to both ends of the gear case 2. Then, the pins 4a are inserted and fixed from the inside to the outside of the side members 4.4. On the outside of the side members 4.4, arc-shaped guide rails 5.5 centered on the tilling shaft 8 of the rotary A are provided.
Are fixed to the upper surface of the rotary cover 1 by bolts 7, 7... Via brackets 5b, 5b. The recess 5a of the guide rail 5 and the fitting portion 4b of the pin 4a are fitted to face each other, and the guide bush 6 made of an elastic material having a small coefficient of friction is fitted to the fitting portion 4b of the pin 4a. It is inserted into the recess 5 a of the rail 5.

And an upper surface of the rotary cover 1;
By rotating the handle 11 of the adjuster interposed between the masts 10 provided on the gear case 2, the rotary cover 1 can be arbitrarily rotated. However, the guide rail 5 can be fixed directly to the rotary cover 1 by welding or the like, and the hole into which the bolt 7 of the bracket 5b is inserted is made elongated in the lateral direction, so that the guide bush 6 can be assembled at the time of assembly. By lightly pressing the rail-side end face against the bottom side of the concave portion 5a and tightening it, it is possible to rotate smoothly without play.

The present invention can also be configured as shown in FIGS. That is, as shown in FIG. 3, the guide rail 5 and the bracket 5b are disposed so as to be located on the center side of the side member 4 in which the pin 4a is inserted, and the recess 5a of the guide rail 5 and the pin 4a The guide rails 5 are arranged such that the fitting portions 4b face each other in the same manner as described above.
The guide bush 6 can be held in the recess 5a of the guide rail 5 by inserting the fitting portion 4b of the pin 4a into the recess 5a.

Also, as shown in FIG.
An arcuate guide rail 5 is fixed outside the side member 4 fixed to both ends of the rotary cover 1, and a bracket 9 into which a pin 9 a is inserted and fixed is fixed to the upper surface of the rotary cover 1. It is also possible to arrange so that the concave portion 5a and the fitting portion 9b face each other, the guide bush 6 is externally fitted to the fitting portion 9b, and fitted into the concave portion 5a of the guide rail 5. As shown in FIG. 5, an arc-shaped guide rail 5 is fixed inside the side member 4, and a fitting portion 9 b in which a guide bush 6 is externally fitted into a concave portion 5 a of the guide rail 5 is arranged facing and fitted. It is also possible to configure so that

In the configuration shown in FIGS. 1 to 5, the shape of the guide bush 6 may be a cylindrical pipe-shaped guide bush 6a or a square pillar pipe as shown in FIG. The guide bush 6b may be used, and is configured to perform relative movement with respect to the guide rail 5.

[0013]

[Effect of the Invention] The present invention is constructed as described above, and has the following effects. First, since the guide bush is inserted into the pin and clamped by the rail, the number of components can be reduced because the guide bush is held very easily. It was possible to rotate without it. Secondly, since the rotary cover is supported via a guide bush made of an elastic body,
It is completely independent and can significantly absorb vibrations and shocks during tillage, improving strength. Third
In addition, without having a fulcrum around the tilling axis of the rotary tilling device,
Since it can be rotated about the cultivation shaft center, it can also be used for a center drive type rotary having a structure that does not support both ends of the cultivation shaft.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotary tillage device.

FIG. 2 is a rear cross-sectional view of a rotary cover support.

FIG. 3 is a cross-sectional view showing a second embodiment.

FIG. 4 is a sectional view showing a third embodiment.

FIG. 5 is a sectional view showing a fourth embodiment.

FIG. 6 is an enlarged side view of a guide bush.

[Explanation of symbols]

 A rotary tilling device 1 rotary cover 4 side member 4a pin 5 guide rail 6 guide bush 9a pin

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotary cover is rotatable with respect to a machine frame.
In the rotary tilling device configured in
The left side of the recess with a substantially U-shaped cross section
Open the guide rail that opens to the right and follow the
The right and left sides of the data cover have concave portions with a substantially U-shaped cross section
In the opposite direction, and
On the other side of the cover and machine frame, the outer periphery of the pin protruding from the side material
Guide bush made of elastic material with small friction coefficient
Mount the mounted guide rail support member to the guide rail.
The length of the guide bush and the pin is
Guide bush on the inner surface of the U-shaped recess of the id rail
At the position where the tip of the
The guide rail is short so that it does not touch the surface.
Between the upper and lower edges of the
A rotary cover rotating device characterized in that it is set to a length that maintains an interval that does not make contact with the rotary cover.