JPS60130302A - Plowing blade attaching method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a mounting structure for a tilling blade that is fixed to a tilling shaft of a tiller via a holder.

An object of the present invention is to provide a method and an apparatus for reliably attaching a tiller to a tiller shaft via a holder arranged on the tiller shaft.

Conventionally, the tilling knife has been attached using a screw-on method such as Pol 1-, but when this method is used, the outer diameter of the bolt is small, and the screw breaks during screwing, making it difficult to firmly screw the tiller. During operation, the bolt may loosen.
Accidents where the tiller comes off, cracks occur in the tiller due to vibration, and the crack breaks, and when the tiller comes off, the fixed poles 1~ are often damaged and cannot be released, so they must be fused and cut with a special tool. There were many problems such as. The present invention solves these problems.

An example of the implementation of the present invention will be explained below based on the drawings.

In the drawing, (1) is the tilling shaft and (2) is the holder.

(3) is a tiller, (4) is a bolt, (11) is an intermediate nut, and (14) is an outer nut.

Fig. 1 shows that a suitable number of cylindrical holders (2) having a desired shape are arranged at predetermined positions on the surface of a tilling shaft (1), and the holders (2) and a tilling blade (3) are arranged at predetermined positions. Appropriately shaped bolt through holes (5), (6), (7),
A bolt (4) is inserted through the hole into a suitable washer (8).
) is the conventional method of attaching the tiller blade. When the screw is attached, the threaded portion is damaged and becomes unusable for the next attachment, resulting in the above-mentioned problem.

The present invention solves these problems, and the first invention is shown in FIG. - Through the through holes (6) and (7), screw the left-hand screw (
The intermediate nut h (11) through which the poles 1 to (4) with the holes 9) cut through and which are screwed into the left screw is bag-shaped or penetrating, and one part of the hole is shaped like a bag to facilitate its rotation. The required number of flat parts are formed to form a square head (■2), and on the outer periphery of the other part there is a right-hand screw (2) with a predetermined pitch larger than the pitch of the left-hand screw (9).
13) is cut to the required length, and an outer nut (14) is screwed into the right-hand thread. For the few words of the tilling knife (3), first turn the middle nut (11) counterclockwise and turn the tilling knife (3).
, then tighten the outer nut 1-(14) with a cloth, and then tighten the middle nut 1-(14) without rotating the outer nut.
1) is strongly rotated clockwise through the square head (12), the left threaded bolt (4) and the intermediate nut loosen, and at the same time the intermediate nut (
11) The outer nut (14) is in a tightened state. This difference in movement is due to the pitch difference between the right screw (13) and the left screw (9), and by making this difference minute, the tiller of the outer nut (14) can be adjusted. (3
) The clamping force is strong. The above-mentioned left and right screws can be cut by either (9) or (13).

The first invention uses the left and right screws (9) and (13) of the first invention, and the pitch is appropriate, and the weak bolt (4) of the threaded part and the intermediate nuts 1 to (]1) are used with an appropriate force tiller (3). ), then firmly tighten the outer nut (14). At this time, the screw (9) is characterized by little damage, and the tightening force can be increased by making the pitch of the screw (13) an appropriate amount smaller than the pitch of the screw (9).

The presence of the washer (8) is appropriate for the above tightening.

As described above, the present invention provides the tilling knife (3) with the holder (2).
), it can be firmly and reliably attached to the base, which eliminates the problem of cutting and raising.

[Brief explanation of drawings]

FIG. 1 is an illustrative view of a conventional tiller (3) screwed onto a holder (2), where A is a front view and B is a front view. is a lateral center cross-sectional view. FIG. 2 shows the main parts of this device, with A being a sectional view and B being a side view. Patent applicant Tadahiro Yuki and two others

Claims (1)

[Scope of Claims] / A bag or a through nut that is screwed into a bolt of an appropriate diameter and length, and a required number of flat parts of an appropriate shape are provided on one side, and the outer periphery of the other side is provided with a flat part that is larger than the thread pitch of the bolt. For example, a series of bolts each having a reverse screw nut that is screwed into the reverse screw of the intermediate nut 1-, which forms a reverse screw of the pitch, is attached to the required part of a holder of an appropriate structure installed on the tilling shaft, and attached to the holder. Through the bolt through holes drilled in the required parts of the tiller,
Insert. First tighten the intermediate nut, then tighten the reverse screw nut, then
A method and device for installing a tiller, etc., by rotating the intermediate nuts 1~ in the reverse direction and attaching a tiller without rotating a reverse screw nut. d. Provide the required number of flat portions of an appropriate shape on one side of the bag or through-nut to be screwed with a bolt of appropriate diameter and length, and on the outer periphery of the other side, provide the same number of flat portions as the thread pitch of the bolt, or with a pitch that is varied by the required amount. For example, a series of bolts having an outer nut 1 which is screwed into a thread of an intermediate nut 1 formed with a thread is attached to a required part of a holder of an appropriate structure disposed on a tillage shaft, and a tiller attached to the holder. This method and device are used to install a tiller, etc., by inserting the bolt through a bolt through hole drilled in the required part of the knife, first tightening the intermediate nut, and then tightening the outer nut.