JPH0441773Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a tilling claw attachment device.

(Prior art) In a rotary tilling device, the base of the tilling claw is inserted into a cylindrical bracket fixed to the claw shaft.
There is one in which the tiller claws are removably attached to the bracket.

By the way, conventionally, as shown in FIG. 8, the tilling claws 101 were attached to the bracket 102 with bolts 103 and nuts 104.

For example, as shown in Japanese Utility Model Publication No. 47-9601.

(Problems to be Solved by the Invention) However, according to the above structure, when attaching or removing the tilling claws, the nut 104 must be tightened or loosened using a tool such as a spanner, and the nut 104 must be tightened or loosened using a tool such as a spanner. It was time consuming and tedious.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a mounting device that allows the tiller claws to be easily attached and detached in a short period of time.

(Means for solving the problem) The technical means is to fix the wall bodies 24 and 2 of the claw mounting bracket 21 provided on the claw shaft 13 facing each other.
A non-circular fitting hole 26 is formed in one wall 24 of 5, and an insertion hole 27 is formed in the other wall 25, and the base 37 of the tilling claw 22 is inserted between both walls 24, 25. A mounting shaft 29 is provided passing through both walls 24, 25 and a base 37, and a non-circular head 30 provided at one end of the mounting shaft 29 is inserted into the fitting hole 26.
The head 30 of the mounting shaft 29 and the other wall 25 are connected to each other by a fixing fitting 33 that is fitted in a relatively unrotatable manner to the projection of the mounting shaft 29 that projects from the other wall 25. In the structure in which the base portion 37 of the tilling claw 22 is mounted and fixed in a pinched manner, notch engagement grooves 31 are formed on both sides of the circumferential surface of the protruding portion of the mounting shaft 29,
The fixing metal fitting 33 includes a fork-shaped engaging leg part 35 and is made of an elastic plate formed in a curve along the longitudinal direction of the engaging leg part 35, and the elastic force of the fixing metal fitting 33 allows the base part 37 of the tilling claw 22 to be fixed to the above-mentioned position. The engagement leg portion 35 is inserted into and engaged with the notch engagement groove 31 in a pinched manner to form a pinched shape.

(Function) According to the present invention, when attaching the tilling claws 22 to the claw mounting bracket 21, the claw mounting bracket 2
After inserting the base 37 of the tilling claw 22 between the walls 24 and 25 of one wall, the mounting shaft 29 is passed through from the one wall 24 side, and the fixing metal fitting is inserted into the notch engagement groove 31 that protrudes from the other wall 25. 33 in an engaging shape from both sides.

By doing so, a fixed state in which the base portion 37 of the tilling claw 22 is held between the head portion 30 and the wall body 25 by the elastic force of the fixing member 33 can be obtained.

Furthermore, when the tilling claw 22 is to be removed, the engaging leg portion 35 may be disengaged from the notch engaging groove 31 by applying a striking force to the fixing member 33 in the opposite direction to that described above.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIGS. 1 to 4, 1 is a rotary machine frame, 2 is a tilling section, 3 is a tilling cover device,
A rotary machine frame 1 is mounted to the rear of a tractor via a three-point linkage mechanism 4 so as to be able to rise and fall freely.

The rotary machine frame 1 has a transmission case 7 at one end of an arm 6 protruding from both left and right sides of an input gear case 5, a support plate 8 at the other end, and a support frame 9 extending rearward from the arm 6. A pair of left and right gauge wheels 10 are inserted through the
is provided. Gear case 5 is for the tractor.
It has an input shaft 11 connected to the PTO shaft and a forward/reverse switching mechanism, and the pawl shaft 13 of the tiller 2 is connected from the transmission shaft 12 in one arm 6 to the wrap transmission mechanism in the transmission case 7. Can be driven in forward and reverse directions. The tillage cover device 3 includes a main cover 14 fixed to the rotary machine frame 1, and a hinge 1 at the rear end of the main cover 14.
It consists of a rear cover 16 which is pivotally attached via a bolt 5, a front side cover 17 on both left and right sides, a rear side cover 18, etc., and the rear cover 16 is urged downward by a bullet lowering mechanism 19. A comb-shaped rake 20 is attached to the rear end of the main cover 14 so as to be located between the tilling section 2 and the rear cover 16.

The tiller 2 has a cylindrical pawl mounting bracket 21 mounted on a pawl shaft 13 horizontally suspended between the support plate 8 and the lower end of the transmission case 7, with the position changed appropriately in the rotational direction and the axial direction.
are fixed by welding etc., and each claw mounting bracket 21
A tilling claw 22 is attached to each.

As shown in FIGS. 1 to 3, the claw mounting bracket 21 has a pair of left and right walls 2 facing each other.
4 and 25, one wall 24 has a regular hexagonal fitting hole 26 formed therein, and the other wall 25 has a circular insertion hole 27 formed therein.

29 is a mounting shaft for mounting the tilling claw 22;
A regular hexagonal head 30 is provided at one end, and is configured to be fitted into the fitting hole 26 in a relatively immovable and detachable manner. Further, a concave annular notch engagement groove 31 is formed at the other end of the mounting shaft 29 along the outer circumferential surface.

Reference numeral 33 denotes a fixing fitting, which is made of an elastic plate material such as spring steel or steel, and has a cutout groove 34 formed along the longitudinal direction from the center of one side, and constitutes a bifurcated engagement leg portion 35. The engaging leg portion 35 is bent in an arcuate shape along the longitudinal direction.

Both walls 24 of the claw mounting bracket 21,
The base 37 of the tilling claw 22 is inserted between the tillers 25 and the mounting shaft 29 passes through the fitting hole 26 of the wall 24, the insertion hole 38 of the base 37, and the insertion hole 27 of the wall 25 from one side. The head 3 of the mounting shaft 29
0 is fitted into the fitting hole 26 of the wall body 24. Further, the notch engagement groove 31 at the other end is formed to protrude from the wall body 25, and the fixing metal fitting 33 is inserted into the notch engagement groove 31.
The engaging leg portions 35 are inserted and engaged from both sides in a pinching manner under elastic deformation. And fixing metal fittings 3
3, the head 30 of the mounting shaft 29 is pulled in the direction of the other wall 25, and the base 37 of the tilling claw 22 is clamped and fixed between the head 30 and the wall 25. There is.

The embodiment of the present invention is constructed as described above, and when the tilling claw 22 is attached to the claw mounting bracket 21, as shown in FIG. After inserting the base portion 37 of the claw 22, the mounting shaft 29 is passed through from one side, and the engaging legs 35 of the fixing bracket 33 are engaged from both sides into the notched engaging groove 31 protruding from the other wall body 25. Just hit it with a hammer. In this way, as shown in FIG. 1, the tilling claws 22 are fixed by the resilient force of the fixing metal fittings 33.

Further, when removing the tilling claws 22, the operation in reverse to the above may be performed.

As described above, the tilling claws 22 can be easily installed and removed by driving the fixing metal fittings 33 with a hammer or hitting in the opposite direction, and in a shorter time than the conventional nut tightening or loosening work. And it can be easily attached and detached.

5 and 6 show a second embodiment,
Notched engagement grooves 31 of the mounting shaft 29 are formed on both sides of the circumferential surface of the protrusion, and a fixing screw 40 with a hexagonal hole is inserted and screwed into the opposite side of the engagement leg 35 of the fixing fitting 33. It is said that the structure is as follows.

FIG. 7 shows a third embodiment, in which the notched engagement grooves 31 on both sides are formed in a so-called V-shape that expands in the direction of the claw shaft 13, and on the other hand, the engagement legs 3 of the fixture 33
5 is provided with an engagement protrusion 41 that is engaged with the lower part of the notch engagement groove 31 to prevent it from coming off.

In each of the above embodiments, the fitting hole 26 of the wall body 24 and the head 30 of the mounting shaft 29 are shown as having a regular hexagonal shape, but they may be non-circular in shape so that they cannot rotate relative to each other.

(Effect of the invention) According to the invention, a non-circular fitting hole is formed in one of the mutually opposing walls of the claw mounting bracket provided on the claw shaft, and an insertion hole is formed in the other wall. The base of the tilling claw is inserted between both walls, and a mounting shaft is provided passing through both walls and the base, and a non-circular head provided at one end of the mounting shaft is inserted into the fitting hole. The base of the tiller claw is held between the head of the mounting shaft and the other wall by means of a fixing bracket attached to the protruding part of the mounting shaft that is fitted so as to be relatively unrotatable and protrudes from the other wall. For those installed and fixed on
Notched engagement grooves are formed on both sides of the circumferential surface of the protruding portion of the mounting shaft, and the fixing metal fitting is made of an elastic plate having forked engagement legs and curved along the longitudinal direction of the engagement legs. In order to make the base of the tilling claw into the above-mentioned pinching shape by the elastic force of the fixing metal fitting, the engaging leg part is inserted and engaged in the notch engagement groove in a pinching manner, and the attachment and detachment of the tilling claw can be done in a short time. It has the advantage of being easy to perform.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of essential parts showing the first embodiment of the present invention, Fig. 2 is a view taken from Fig. 1 - taken along the line, Fig. 3 is a view taken taken from Fig. 1 - taken taken from the line shown in Fig. 4, and Fig. 4 is an overall side view. Figure, 5th
The figure is a sectional view of the main part showing the second embodiment, and FIG.
FIG. 7 is a side view of the main part showing the third embodiment, and FIG. 8 is a sectional view of the main part showing the conventional example. 13...Claw shaft, 21...Claw mounting bracket, 2
2... Cultivating claw, 24, 25... Wall body, 26... Fitting hole, 27... Insertion hole, 29... Mounting shaft, 30...
... head, 31 ... notch engagement groove, 33 ... fixing metal fitting, 35 ... engagement leg, 37 ... base.

Claims (1)

[Scope of utility model registration request] One wall 24 of mutually opposing walls 24 and 25 of the claw mounting bracket 21 provided on the claw shaft 13
A non-circular fitting hole 26 is formed in the other wall body 25.
An insertion hole 27 is formed in the hole 27, and the base 37 of the tilling claw 22 is inserted between the walls 24, 25, and the mounting shaft 29 is inserted through the walls 24, 25 and the base 37.
The mounting shaft 29 is provided with a non-circular head 30 provided at one end of the mounting shaft 29 and is fitted into the fitting hole 26 in a relatively unrotatable manner, and protrudes from the other wall body 25.
The base 37 of the tilling claw 22 is clamped and fixed between the head 30 of the mounting shaft 29 and the other wall 25 by a fixing fitting 33 mounted on the protrusion of the mounting shaft 29. Notched engagement grooves 31 are formed on both sides of the circumferential surface of the protrusion, and the fixing metal fitting 33 is made of an elastic plate that is provided with two-pronged engagement legs 35 and is curved along the longitudinal direction of the engagement legs 35. , tilling claws 22 due to the elastic force of the fixing metal fittings 33.
In order to make the base portion 37 of
A tilling claw attachment device characterized in that an engaging leg portion 35 is inserted into and engaged with 1 in a pinching manner.