JPH052014Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a rear cover structure for a rotary tiller that is attached to the rear of a tractor and used for tilling work.

(b) Prior Art Conventionally, in order to reinforce the strength of a rear cover made of a plate material, it has been known that ribs are integrally protruded from the rear cover or a reinforcing member is provided on the back surface. For example, Utility Model Application No. 52-50913, Utility Model Application No. 58-121504, and Utility Model Application No. 57-
As in Publication No. 173506.

(c) Problems to be solved by the invention The purpose of the invention is to arrange a front reinforcing member and a back reinforcing member in order to make the strength of the rear cover even stronger, and to attach a soil adhesion prevention plate to the back reinforcing member. A space is formed on the back side of the back reinforcing member and the soil adhesion prevention plate, and the soil adhesion prevention plate is made to have flexure to prevent soil from adhering to it.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

In the rear cover 5 of the rotary tillage device,
The front part of the rear cover 5 forms a curved part so that the back surface becomes a recessed part, and the back reinforcing member 3 arranged in the front-rear direction is fitted and fixed in the curved part, and conversely, the rear part of the rear cover 5 has a recessed surface. Configure the curved part as follows,
A surface reinforcing member 2 arranged in the front-rear direction is fitted and fixed in the curved portion, and a soil adhesion prevention plate 1 is attached to the back reinforcing member 3.

(E) Embodiments and operations The purpose and structure of the present invention are as described above. Next, the structure and operations of the embodiments shown in the attached drawings will be explained.

Figure 1 is an overall side view of the rotary tiller, Figure 2 is a perspective view of the rear cover of the present invention, Figure 3 is a plan view of the rear cover, Figure 4 is a side view of the rear cover, and Figure 5 is the reinforcement of the back surface. It is a side sectional view of the fastening part which fastens a member and a soil adhesion prevention board.

The overall structure of the rotary tiller will be explained with reference to FIG.

In the embodiment shown in FIG. 1, a center drive type rotary tiller is shown which is directly attached to a tractor by a rotary support frame 20. As shown in FIG.

rotary gearbox, tractor
Power is transmitted from the PTO shaft, and tilling claw shafts protrude left and right from a tilling case 23 which is integrally suspended below the rotary gear box.

A tilling claw 18 is installed on the tilling claw shaft. A tilling cover 19 and a side cover 17 are arranged to surround the rotation locus of the tilling claws 18. The rear cover 5 is pivotally supported at the rear end of the tilling cover 19 by a hinge pin 7, and is arranged to be movable up and down.

In order to perform soil leveling work using the rear cover 5, a hanger rod 9 is suspended from the depth frame 21, connected to the upper surface of the rear cover 5, and a biasing spring fitted to the outer periphery of the hanger rod 9 moves the rear cover 5 downward. It is suppressing it. The depth frame 21 can be adjusted up and down by a depth handle 22.

The structure of the rear cover 5 will be explained based on FIGS. 2, 3, and 4.

The rear cover 5 is made of a single iron plate, and has a cutout 5b for mounting a groove cutter in the center of the rear, and cutouts 5a for fitting a depth wheel on both sides of the rear.

The attachment notch 5b of the groove cutter and the insertion notch 5a of the depth wheel are closed by attaching auxiliary covers when they are not needed. Further, on the left and right sides of the front end, hinge pins 7 are welded and fixed to cylindrical reinforcing parts, and the hinge pins 7 are pivotally connected to pivots at the rear end of the tilling cover 19, so that they can freely rotate up and down. .

In addition, there are reinforcing flanges 6 at the left and right ends of the rear cover 5.
A fitting hole is provided in the reinforcing flange 6, and the extension rear cover can be attached and detached using this fitting hole.

Also, the groove cutter mounting notch 5b of the rear cover 5
A reinforcing rib 5c is provided across the insertion notch 5a of the depth wheel in the lateral direction, and the reinforcing rib 5c
A surface reinforcing member 2 in the front-rear direction is fixedly installed on top of the front-back direction.

A total of four surface reinforcing members 2 are arranged, two on the left and right sides, and a back reinforcing member 3 is fixed on the back side of the upper surface of the rear cover 5 so as to extend forward from the surface reinforcing members 2. There is.

The front end of the rear cover 5 is configured with a curved part so that the back surface becomes a concave part, and to match this, a back reinforcing member 3 having a protrusion on the upper side is fitted and fixed into the curved part. There is. Conversely, the surface of the rear end of the rear cover 5 is curved downward, and the surface reinforcing member 2 having a downwardly protruding portion is fitted into this curve and fixed.

The surface reinforcing member 2 is disposed and fixed while riding over the reinforcing rib 5c. In addition, the back reinforcing member 3 and the front reinforcing member 2 are arranged at approximately the same position, and are integrally fixed with the rear cover 5 sandwiched between them, as shown in FIG. 4, and act as a single reinforcing member. There is. Further, a back reinforcing member 8 is fixedly provided at a position in front of the depth wheel fitting notch 5a of the rear cover 5. And over the entire width of these back reinforcing members 3 and 8,
A soil adhesion prevention plate 1 is attached to the lower surface.

In this way, the back reinforcing members 3 and 8 are fixedly installed in order to fit into the recess of the rear cover 5, and the crosspiece member 2 that connects the reinforcing members 3 and 8 with each reinforcing member is installed.
By attaching the soil adhesion prevention plate 1 to the lower surface of the rear cover 6, 25, a space is formed between the soil adhesion prevention plate 1 and the back surface of the rear cover 5, so that even if colliding soil adheres, When the soil adhesion prevention plate 1 is bent, the soil is likely to crack and fall. 13 is a rolled up reinforcing end at the rear end of the rear cover 5.

FIG. 5 shows the configuration of a connector 10 that connects the soil adhesion prevention plate 1 and the back reinforcing member 3.
The connector 10 is composed of a widening portion 10a and a fitting pin 10b, and after first fitting the widening portion 10a in a contracted state into a fixing hole, the fitting pin 10b is pushed in, thereby fixing the widening portion 10a. The hem part expands and cannot be removed, and the soil adhesion prevention plate 1 and the back reinforcing member 3 are fixed.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, by fitting and fixing the back reinforcing member 3 and the front reinforcing member 2 into the curved portions provided on the front and back sides of the rear cover 5, and fixing them both with the rear cover 5 sandwiched between them, it is possible to Compared to reinforcing members only on the bottom surface, the strength can be significantly increased,
It was also possible to increase the power to level the cultivated soil.

Second, by attaching the soil adhesion prevention plate 1 to the lower surface of the back reinforcing member 3, a space can be formed between the soil adhesion prevention plate 1 and the rear cover 5,
Even if the collided soil sticks, the soil adhesion prevention plate 1 bends in the direction of the space, causing cracks in the soil, and the adhesion of soil can be significantly reduced.

Thirdly, by attaching the soil adhesion prevention plate 1 to the back reinforcing member 3, there is no need to attach the soil adhesion prevention plate 1 directly to the rear cover 5, and the connector 10 no longer protrudes from the upper surface of the rear cover 5. It is.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the rotary tiller, Fig. 2 is a perspective view of the rear cover of the present invention, Fig. 3 is a plan view of the rear cover, Fig. 4 is a side view of the rear cover, and Fig. 5 is a reinforcement of the back surface. It is a side sectional view of the fastening part which fastens a member and a soil adhesion prevention board. 1... Soil adhesion service board, 2... Surface reinforcing member,
3... Back reinforcement member, 5... Rear cover, 6...
Reinforcement flange, 7...hinge pin, 9...hanger rod.

Claims (1)

[Scope of utility model registration request] In the rear cover 5 of the rotary tillage device,
The front part of the rear cover 5 forms a curved part so that the back surface becomes a recessed part, and the back reinforcing member 3 arranged in the front-rear direction is fitted and fixed in the curved part, and conversely, the rear part of the rear cover 5 has a recessed surface. Configure the curved part as follows,
A rear cover for a rotary tiller, characterized in that a surface reinforcing member 2 disposed in the front-rear direction is fitted and fixed in the curved portion, and a soil adhesion prevention plate 1 is attached to the back reinforcing member 3.