JPH0240108Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a mounting device for mounting a front loader on the front of a tractor.

(b) Prior Art The technology of arranging a cam-type mounting device to mount a working implement on the front of a tractor has been known to the public.

For example, Utility Model Application Publication No. 57-31364, Utility Model Application Publication No. 55
-31862~5, Special Publication No. 50-847,
This technique is similar to the techniques described in Japanese Utility Model Application Publication No. 58-25359 and Japanese Patent Application Publication No. 56-146522.

(c) Problems to be Solved by the Invention The present invention is an improvement over the above-mentioned prior art in which the attachment of the left and right rear frames and the support rod attachment frame to the tractor was complicated.

In particular, in the past, the support rod mounting frame was attached to separate left and right members of the tractor's front axle mounting frame using bolts. The support rod mounting frame can be fixed to the front surface of the front axle mounting frame with bolts.

(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 a configuration in which the left and right rear frames 4, 4 are removable to the rear of the front axle mounting frame 3 of the tractor, and the left and right support plates 5, 5 of the front loader are removable to the left and right rear frames 4, 4, the left and right support The left and right arms 2,2 and the rear ends of the arm cylinders 6,6 are pivotally supported on the plates 5,5, and the left and right side frames 11,1
1, and the left and right side frames 11,
11 protrudes forward along the front axle mounting frame 3, bends downward at the front end and extends to the front end of the front axle mounting frame 3,
The support rod 12 installed between the left and right side frames 11, 11 is pivoted to the mounting plate 14a by a downward U.
The support rod mounting frame 14, which can be attached to the letter-shaped cam 16 from below and has the mounting plate 14a projecting thereon, can be detached from the front surface of the front axle mounting frame 3 with bolts.

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

In the front loader according to the present invention, as shown in FIGS. 1 and 2, a bucket cart 1 is arranged in front of a tractor, and the bucket cart 1 is pivotally supported at the tips of long left and right arms 2, 2. The left and right arms 2, 2 have a slightly arched shape when viewed from the side, and are designed to position the bucket 1 further downward to maintain a better bucket posture.

Then, left and right rear frames 4, 4 are respectively attached to the left and right side surfaces of the rear of the front axle mounting frame 3 of the tractor, and left and right support plates 5, 5 are attached to the upper parts of the rear frames 4, 4. The structure is such that the rear ends of the left and right arms 2, 2 are pivotally connected by their upper ends.

Then, left and right arm cylinders 6, 6 are interposed between the left and right support plates 5, 5 and the center portions of the left and right arms 2, 2, respectively, and the arm cylinders 6, 6 are pivoted to the support plates 5, 5 by the telescopic operation of the arm cylinders 6, 6. The left and right arms 2, 2 rotate vertically.

Also, bucket actuating plates 7, 7 are pivotally attached to the upper front ends of the left and right arms 2, 2, connecting rods 8, 8 are provided between the upper ends of the bucket actuating plates 7, 7 and the bucket 1, and furthermore, bucket actuating plates 7, It has a structure in which left and right bucket cylinders 9, 9 are interposed between the rear end of 7 and the upper ends of the rear left and right arms 2, 2. Therefore, by the expansion and contraction of the bucket cylinders 9, 9, the bucket 1 is moved to the front end pivot pin 10 of the left and right arms 2, 2.
It rotates around 10 as a fulcrum.

In this way, the left and right arms 2, 2 are mounted and supported on the tractor, but with this structure, the arms 2, 2,
2. Because a considerable amount of weight is placed on the front end,
A load is applied to the support plates 5, 5 in a direction that causes them to fall forward.

Furthermore, it is desired that the front loader be structured so that it can be easily removed.

Therefore, the present invention fixes the rear ends of the left and right side frames 11, 11 to the left and right support plates 5, 5, projects the left and right side frames 11, 11 forward, and directs the front ends toward the front of the front axle mounting frame 3. The structure is bent downward, and furthermore, a support rod 12 is provided between the front ends of the left and right side frames 11, 11.

The support rod 12 is structured to be attached to the support rod attachment frame 14 attached to the front end of the front axle attachment frame 3 of the tractor, and the support plates 5, 5 are attached via the upper part of the rear frames 4, 4 and the side frames 11, 11. It is configured to be supported at the front end of the front axle mounting frame 3.

That is, the left and right side frames 11, 11 have a shape as shown in FIG. 3, and the stands 15, 15 are housed in the left and right fronts, respectively, and the stands 15, 15 are extended downward and placed on the ground. By fixing the front loader in the contact position, the front loader can be supported by the bucket 1 and the stands 15, 15, so the front loader can be easily removed or attached by simply moving the tractor back and forth. It is. 11a is a reinforcing rod.

As shown in FIG. 4, the present invention has a structure in which a support rod attachment frame 14 is bolted to the front end of the front axle attachment frame 3 of the tractor, and the support rod 12 can be attached to the support rod attachment frame 14.

As shown in FIG. 5, the support rod mounting frame 14 has two mounting plates 14a, 14a each protruding on the left and right sides, each having an inverted U-shaped groove.
A U-shaped cam 16 having a U shape between a and 14a
was attached with pin 17.

Therefore, as shown in FIG.
4a and a U-shaped cam 16, one end of the U-shaped cam 16 is supported by a pin 18 inserted between the mounting plates 14a, 14a, and The cam 16 is fixed by the pin 17.

When removing the support rod 12, pull out the pin 17 that locks the U-shaped cam 16 as shown in FIG. 7, rotate the cam 16 to an inverted U position, and remove the support rod 12 from below. It is to make it. 2
Reference numeral 5 designates a locking pin for locking the cam 16 in a downward direction.

The support plate 5 has a shape as shown in FIGS. 10 and 11, and the rear frame 4 has a shape as shown in FIGS. 12 and 13. It is supported by the upper part of the rear frame 4.

Furthermore, in order to attach the support rod 12 to the support rod attachment frame 14, it is sufficient to carry out the procedure in reverse to the above.

Next, the rear frames 4, 4 supporting the rear ends of the left and right arms 2, 2 and the left and right side frames 11, 11
Now, the structure of the support plates 5, 5, and the mounting method will be explained.

As shown in FIG. 8, the rear frames 4, 4 are attached to the left and right sides of the front axle mounting frame 3 of the tractor with bolts, and are attached to both ends of the supports 19, 19 projecting laterally and to the bottom plate of the safety frame 20. It is attached to 20a. As shown in FIG. 9, a support plate 5 is attached to the upper part of the rear frame 4.

There are receiving plates 4b, 4b on the left and right of the upper plate 4a of the rear frame 4.
is erected. The receiving plates 4b, 4b have a shape in which a U-shaped recess is provided diagonally downward from the front part, and a frame plate 4 is provided on the outer surface of the receiving plates 4b, 4b.
c, 4c are positioned, and the receiving plates 4b, 4b are reinforced by the frame plates 4c, 4c.

Therefore, by fitting the pins 5a, 5a of the support plate 5 into the recesses of the receiving plates 4b, 4b of the rear frame 4, and further inserting the pins 21 from the sides as shown in FIG. It is attached to the frame 4.

Reference numeral 22 is a locking pin to prevent the pin 21 from coming off.By inserting one end of the locking pin 22 into the hole of the pin 22 provided on the upper side of the rear frame 4, the pin 21 can be locked. It can be hung.

In addition, the lower part of the rear frame 4 includes a side plate 4d and a bottom plate 4e.
A reinforcing plate 4f is provided between the side plate 4d, the bottom plate 4e, and the top plate 4a.

Then, from the back side of the side plate 4d, a cylindrical body 4g
protrudes, and a mounting plate 4h is attached to the end of the cylindrical body 4g.

Therefore, the mounting plate 4h and both ends of the support plates 19, 19 protruding from the left and right sides of the front axle mounting frame 3 are attached with bolts, and the bottom plate 4e and the bottom plate 20g of the safety frame 20 are further attached with bolts. By doing so, the rear frame 4 is supported.

As a result, when the front loader is detached, the support plates 5, 5 supporting the rear ends of the side frames 11, 11 are removed from the rear frames 4, 4, and the support rod 1 between the front ends of the side frames 11, 11 is removed.
The front loader can be easily removed from the tractor without tools by removing the front loader 2 from the support rod mounting frame 14, lowering the stands 15, 15 and the bucket 1 to the ground, and moving the tractor backwards.

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

First, by making the connecting portion between the left and right side frames 11, 11 and the front axle mounting frame 3 the front surface of the front axle mounting frame 3, the left and right side frames 11,
The support rod 12 placed between the support rods 11 can move up and down without interfering with other members, and U-shaped cams 16 are placed downward from the mounting plates 14a placed on the left and right sides of the support rod mounting frame 14. A simple mounting mechanism can be provided in which the support rod 12 can be mounted while rotating from below to above.

As a result, while supported by the stands 15, 15, the downward U-shaped cam 16 is placed on the support rod 12 at a low position, and in this state, the hydraulic cylinder 6 is extended, and the left and right side frames 11 are gradually extended. , 11 and the support rod 12, the support rod 12 and the downward U-shaped cam 16 can be attached without manual operation.

Second, the support rod mounting frame 14 in which the mounting plate 14a and the U-shaped cam 16 are arranged is configured to be fixed to the front surface of the front axle mounting frame 3, so that the left and right mounting plates can be attached to the front axle as in the conventional case. There is no longer a need to attach the support rod attachment frame 14 to the left and right sides of the attachment frame separately, and by attaching only the support rod attachment frame 14 to the front of the front axle attachment frame 3 with bolts, the support rod attachment frame 14 can be easily attached and detached. .

Thirdly, when attaching the support rod mounting frame to the front axle mounting frame from the side, it is difficult to insert bolts because of the presence of the front wheel, but the support rod mounting frame is attached to the front of the open front axle mounting frame. By making it possible to tighten the support rod mounting frame 14 with bolts, the support rod mounting frame 14 can be easily attached and detached.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the tractor equipped with a front loader, Figure 2 is a side view of the front loader, Figure 3 is a perspective view of the side frame, Figure 4 is a perspective view of the side frame attached to the front, and Figure 5. is a perspective view of the support rod attachment frame, Figures 6 and 7 are side sectional views showing how to attach the support rods of the side frame to the support rod attachment frame, and Figure 8 is a diagram showing how to attach the rear frame. FIG. 9 is a perspective view of the upper part of the rear frame with the support plate attached, FIGS. 10 and 11 are front and side views of the support plate, and FIGS. 12 and 13 are front views and side views of the rear frame. The side view, FIG. 14, is a front view of the rear frame with the support plate attached. 2, 2...Left and right arms, 3...Front axle mounting frame,
11... Left and right side frames, 14... Support rod mounting frame, 16... U-shaped cam.

Claims (1)

[Scope of utility model registration request] In a configuration in which the left and right rear frames 4, 4 are removable to the rear of the front axle mounting frame 3 of the tractor, and the left and right support plates 5, 5 of the front loader are removable to the left and right rear frames 4, 4, the left and right support The left and right arms 2,2 and the rear ends of the arm cylinders 6,6 are pivotally supported on the plates 5,5, and the left and right side frames 11,1
1, and the left and right side frames 11,
11 protrudes forward along the front axle mounting frame 3, bends downward at the front end and extends to the front end of the front axle mounting frame 3,
The support rod 12 installed between the left and right side frames 11, 11 is pivoted to the mounting plate 14a by a downward U.
A front loader mounting device for a tractor characterized in that a support rod mounting frame 14, which can be mounted to a letter-shaped cam 16 from below and has a mounting plate 14a projecting thereon, can be mounted and removed from the front surface of a front axle mounting frame 3 with bolts. .