JPH0547522Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention connects the rear cover and a bracket for attaching an extension leveling plate arranged on the outer surface of the rear cover using a connector that passes through both. The present invention relates to a rear cover structure of a rotary tiller.

[Conventional technology]

Generally, the bracket for attaching the extension leveling plate is attached to the outer surface of the rear cover by welding. However, since the rear cover is made of thin sheet metal, it may be distorted by heat during welding, which is not very desirable.

Therefore, when attaching the bracket to the rear cover, it has become desirable to connect the bracket to the rear cover using a connector such as a bolt that passes through both.

[Problem that the invention attempts to solve]

However, the following problems arose when using such a connector.

That is, in a rotary tiller, the soil scraped up by the tiller claws during the upper cutting operation rotates around the inside of the device together with the tiller claws, and the soil comes into contact with the back surface of the rear cover without being able to withstand it. As a result, a portion of the connector exposed on the inner surface of the rear cover wears out prematurely due to soil, which is disadvantageous in terms of maintenance such as repair or replacement.

The present invention was created with attention to these points, and its purpose is to eliminate disadvantages in maintenance while taking advantage of the advantages of using a connector.

[Means for solving the problem]

The characteristic feature of the present invention is that an inclined portion is provided in the rear cover portion corresponding to the upper part of the connector exposed on the inner surface side, and a virtual extension line of this inclined portion downward passes in front of the connector exposed on the back surface side, and its functions and effects are as follows:

[Effect]

In other words, the soil raked up by the tiller is
The soil that circulates inside the rotary tillage device along with the tilling claws and on the outside thereof collides with the inner surface of the rear cover and moves backward and downward along the rear cover. Conventionally, this soil directly contacts the connector and is the main cause of wear, but due to the sloped part provided on the rear cover portion above the connector, it does not come into contact with the connector. You will be able to pass in front of it. In short, the amount of soil that comes into contact with the connectors exposed on the back side of the rear cover is reduced.

[Effect of idea]

While taking advantage of this effect and the advantages of using connectors, we were able to reduce wear caused by soil and simplify maintenance.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 2, a bevel case 1 with an input shaft 1a protruding forward in the center of the left and right is provided, and pipe frames 2 and 3 are provided protruding from the case 1 in both left and right directions, A support frame 4 is provided at the end of the right pipe frame 3, and a chain case 5 is provided at the end of the left pipe frame 2.
Further, a rotary shaft 6 is installed between the lower end of the chain case 5 and the lower end of the support frame 4. Then, side covers 7 are attached to the inner wall of the chain case 5 and the inner side of the support frame 4, respectively.
Further, an upper cover 8 is provided below the left and right pipe frames 2 and 3 and has an arcuate shape in side view between the chain case 5 and the support frame 4. A ground leveling plate 9 is provided to be swingable about the left and right horizontal axis P, thereby forming a rotary tilling device A.

As shown in FIG. 1, the ground leveling plate 9 includes a rear cover 9a pivotally connected to the upper cover 8
The extension leveling plate 9b is connected to the outer surface of the ground plate through a pin-lock engagement structure. That is, brackets 10 which are U-shaped in plan view are attached to the left and right sides of the outer surface of the rear cover 9a in a state that opens rearward, and pins 11a and 11b whose axes face in the left-right direction are located at intermediate positions between the upper ends of the brackets 10.
Further, at the lower end of the bracket 10, there is a pin 11c whose axis faces in the left-right direction, as described above.
It is installed so that it can be inserted and removed.

Further, on the back surface of the extended ground leveling plate 9b, that is, on the upper part of the surface facing the rear cover 9a, its position is set so that it faces the left and right brackets 10 and has a width that fits inside the left and right plate portions 10a of the brackets 10. A bracket 12 consisting of a pair of left and right plate pieces 12a is fixed as an engaging member. And this board piece 1
When viewed from the side of 2a, the recesses Ga and Gb, which are opened downward at the upper and lower positions respectively, are cut out to form hooks Fa,
Form Fb. Also, these two hooks Fa,
Fb has its distal end bent at an angle so that it is tapered in plan view, and the left and right plate pieces 12a are joined at their distal ends, so that when either hook F is engaged with either pin 19, The left and right inclined surfaces of the hook F correspond to the left and right plate portions 10 of the bracket 10.
By contacting and guiding the recess G along the inclined surface, when the pin 11 is engaged, the recess G is formed on a relatively wide surface along the axial direction of the pin 11. and the hook F.

When the rotary tillage device A is used for work in fields, etc., the upper and lower pins 11a, 11c
By engaging the upper and lower hooks Fa and Fb, the tip of the ground leveling plate 9 can be set at a fixed position.
The upper and lower hooks are attached to the pins 11b and 11c at the lower end.
By engaging Fa and Fb, the tip of the ground leveling plate 9 is extended downward.

An automatic locking mechanism 21 is provided at the back of the upper hook F to prevent the pin 11 engaged with the recess G from coming off. In other words, this lock mechanism 21 has an operating lever 15, which is an example of an operating section, pivotally supported on a pair of left and right handles 14 provided on the outer surface of the extended ground leveling plate 9b, and a lever 15, which is an example of an operating section, is attached to the extended ground leveling plate 9b and the bracket 12 at the tip thereof. It pivotally connects the head of the lock pin 16 that has passed through the lock pin 16, and this lock pin 16
is biased to protrude toward the recess G side by a plate spring 17 attached to the back side of the operating lever 15. Also,
This lock mechanism 13 is configured such that by swinging the operating lever 15 clockwise in the figure, the lock pin 16 is retracted against a spring 17 and the lock is released.

Therefore, the extended ground leveling plate 9b is attached to the rear cover 9a.
When removing the handle 14 from the operating lever 1
5 to release the lock, move the extension leveling plate 9b upwards while still holding it, and press the recess G and pin 1.
1 is disengaged. When installing the extension ground leveling plate 9b, hold the handle 14 together with the operating lever 15 to release the lock, and then insert the recess G into the pin 1.
1 and then release the hand, the locking mechanism 13 will automatically operate and the installation will be completed.

To attach the left and right brackets 10 to the outer surface of the rear cover 9a, use two bolts 18, upper and lower, from the back surface of the rear cover 9a corresponding to the mounting position.
Connectors a and 18b are inserted between the rear cover 9a and the bracket 10 and tightened with nuts 19a and 19b in the opening of the bracket 10. Further, a rear cover portion corresponding to a position slightly above the upper bolt 18a is bent over the entire width of the cover to form a step-like sloped portion 20, and a downward imaginary extension line l of this sloped portion 20 is
It passes through the front of the head of the upper bolt 18a exposed from the back side of the bolt. By doing this, the soil rotating inside the rotary tillage device A during tillage work can be prevented from coming into forceful contact with the heads of the upper and lower bolts 18a, 18b.
It is designed to be guided down through the front of the head of the person.

To carry out the present invention, the bolts 18a and 18b are inserted through the opening of the bracket 10, and their tips are tightened into the nuts 19a and 19b on the back surface of the rear cover 9a.
You may also tighten it with Also, rivets may be used as the connectors instead of the bolts 18a, 18b. Further, the inclined portion 20 is connected to the rear cover 9a.
It does not need to be formed over the entire width of the bolt 18a, and it is sufficient that it is formed at least above the upper bolt 18a.
It may be curved instead of stepped.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the rear cover structure of the rotary tilling device according to the present invention, and FIG. 1 is a longitudinal side view;
FIG. 2 is a perspective view of the rotary tiller. 9a...Rear cover, 10...Bracket, 1
8a, 18b...Connector, 20...Slanted portion, l...
...Virtual extension line.

Claims (1)

[Scope of utility model registration request] This is a rear cover structure for a rotary tillage device in which a rear cover 9a and a bracket 10 for attaching an extension ground leveling plate arranged on the outer surface of the rear cover are connected using connectors 18a and 18b that pass through both. A sloped portion 20 is provided in the rear cover portion corresponding to the upper part of the exposed connecting tools 18a and 18b,
In this rear cover structure for a rotary tiller, the downward imaginary extension line 1 of the inclined portion 20 passes in front of the connectors 18a and 18b exposed on the back side.