JPH0240109Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a simple attachment mechanism for attaching a front loader to the front of a tractor.

(b) Prior Art Conventionally, the technology related to the easy mounting mechanism of a front loader has been known to the public. For example, there is a technique described in Japanese Utility Model Application Publication No. 57-31364.

Also, insert the locking pin in the backhoe.
Techniques for fixing members are also known. For example, there is a technique described in Japanese Utility Model Application Publication No. 52-159004.

As a mechanism for attaching a front loader to a tractor, a conventional technique is known in which the front loader can be automatically attached as the tractor moves forward, but this mechanism has disadvantages in that it is too complicated and takes time to attach and detach.

(c) Problems to be solved by the invention In order to solve these drawbacks, the invention provides a boss hole for inserting a locking pin in the rear frame to which the rear support plate of the front loader is attached, and furthermore, A locking member for locking a pin that can be freely inserted and removed from the locking pin is provided near the locking pin, and a guide pin is provided in which the hole into which the locking pin is inserted is aligned, and the state in which the pin is aligned with the guide pin is provided. A locking pin is inserted, and the left and right support plate portions can be attached using the guide pin and locking pin.

(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.

To the rear frames 4, 4 that stand up from the front axle mounting frame 3,
In the configuration in which the rear support plates 5, 5 of the front loader are attached, guide pins 5a, 5 provided at the upper part of the rear frames 4, 4 and the lower parts of the left and right support plates 5, 5 are installed.
Receiving plates 4b, 4b are provided with U-shaped recesses into which a can be inserted from above, boss holes 4', 4' are provided in the rear frames 4, 4, and left and right support plates 5, 5 are provided. Boss holes 5', 5' are opened in the guide pins 5a, 5a.
The left and right rear frames 4, 4 and the lower portions of the left and right support plates 5, 5 are fixed by a locking pin 21.

(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.

As shown in FIGS. 1 and 2, the front loader according to the present invention has a bucket cart disposed in front of the tractor, and the bucket cart is pivotally supported at the ends of 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 lower down to maintain a better bucket posture.

Then, left and right rear frames 4, 4 are attached to the left and right side surfaces of the front axle mounting frame 3 of the tractor, respectively, left and right support plates 5, 5 are attached to the upper parts of the rear frames 4, 4, and the upper ends of the support plates 5, 5 are attached. The left and right arms 2, 2
It has a structure in which the rear end is pivoted.

And between the left and right support plates 5, 5 and the center of the left and right arms 2, 2, there are left and right hydraulic cylinders 6, 6, respectively.
The structure is such that the left and right arms 2, 2, which are pivotally connected to the support plates 5, 5, can be rotated by the expansion and contraction operations of the hydraulic cylinders 6, 6.

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 hydraulic 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 hydraulic cylinders 9, 9, the bucket 1 rotates about the front end pivot pins 10, 10 of the left and right arms 2, 2 as fulcrums.

In this way, the rear ends of the left and right arms 2, 2 are pivotally connected to the tractor, but in the past, the rear ends of the arms 2, 2 were connected to the tractor using bolts or a special mounting device. Because the front loader was attached to the front loader, it was necessary to use a tool to remove the bolt when removing it from the tractor, and it required some skill to remove and install it.

Left and right support plates 5, 5 have left and right side frames 11,
11 and fix the rear ends of the left and right side frames 1.
1 and 11 protrude forward, and a support rod 12 is further provided between the front ends of the left and right side frames 11, 11.

The structure is such that the support rod 12 can 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 placed at the bottom.
It is fixed to the left and right rear frames 4, 4 by the locking pin 21 and the guide pins 5a, 5a, and furthermore, the side frame 1
1 and 11 so that it can be supported at the front end of the front axle mounting frame 3.

The left and right side frames 11, 11 have a shape as shown in FIG. 3, and have stands 15, 15 housed in the left and right fronts, respectively, and the stands 15, 15 are extended downward to a position where they touch the ground. By fixing the front loader in place, the front loader can be supported by the bucket 1 and the stands 15, 15, and the front loader can be easily removed or installed by simply moving the tractor back and forth. It is. 11a is a reinforcing rod.

As shown in FIG. 4, a support rod attachment frame 14 is attached to the front end of the tractor axle attachment frame 3 with bolts, and the support rod 12 can be attached to the support rod attachment frame 14.

As shown in FIG. 5, this support mounting frame has two mounting plates 14a, 14a each having an inverted U-shaped groove protruding on the left and right sides.
U-shaped cams 16, 16 are pivotally connected to a, 14a by pins 17.

Therefore, as shown in FIG.
4a and the 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 pin 18 and the pin 17 The cam 16 is fixed by this.

When removing the support rod 12, pull out the pin 18 that locks the cam 16 as shown in FIG. 7, rotate the cam 16 to an inverted U position, and remove the support rod 12 from below. That's what I do. 1
Reference numeral 5 designates a locking pin for locking the cam 16 in a downward direction.

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.

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.
a and 5a are supported at the upper part of the rear frame 4.

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 support plates 19, 19 projecting laterally and to the bottom plate of the safety frame 20. 20a. Then, as shown in FIG. 9, a support plate 5 is attached to the upper part of the rear frame 4.

That is, receiving plates 4b, 4b are erected on the left and right sides of the upper plate 4a of the rear frame 4. This receiving plate 4b, 4b
has a U-shaped concave portion diagonally downward from the front part, and furthermore, frame plates 4c, 4c are located on the outer surfaces of the receiving plates 4b, 4b, and the frame plates 4c, 4c
The receiving plates 4b, 4b are reinforced by this.

Therefore, it is sufficient to fit the guide pins 5a, 5a of the support plate 5 into the recesses of the receiving plates 4b, 4b of the rear frame 4.

Next, the support plate 5 and the rear frame 4, which are the main parts of the present invention, will be explained.
Let me explain the locking structure.

This locking structure is as shown in FIG.
Insert the locking pin 21 from the boss hole 4' for inserting the locking pin 21 provided on the side surface of the rear frame 4, and insert the locking pin 21 so that it passes through the boss hole 5' on the side surface of the support plate 5 supported by the rear frame 4. That's fine.

By doing so, the support plate 5 is locked to the rear frame 4.

Furthermore, in order to prevent the locking pin 21 from coming out, the lock pin 22 is inserted into the hole 21a of the locking pin 21.
2, and one end of the pin 22 is inserted into a hole 23a of a locking member 23 provided on the upper side surface of the rear frame 4, thereby locking the rear frame 4.

For this purpose, the locking pin 21 is provided with a hole 21a for the locking pin 22 in a direction perpendicular to the axial direction. In order to prevent the lock pin 22 from falling out when inserting the lock pin 22 into the hole 21a, the upper part of the lock pin 22 is made slightly larger so that the lock pin 22 stops just before the hole 21a.

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 supports 19, 19 protruding from the left and right sides of the front axle mounting frame 3 are mounted with bolts, and the bottom plate 4e and the bottom plate 20a of the safety frame 20 are further mounted with bolts. By doing so, the rear frame 4 is supported.

As a result, when detaching the front loader, remove the support plates 5, 5 supporting the rear ends of the side frames 11, 11 from the rear frames 4, 4 by removing the locking pins 21, and then Supporting rod mounting frame 1 for supporting rods 12 of frames 11, 11
The front loader can be easily removed from the tractor without tools by removing the front loader from the front loader 4, lowering the stands 15, 15 and bucket 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, at the joint between the left and right support plates 5, 5 and the rear frames 4, 4, guide pins 5a, 5a are provided on the left and right support plates 5, 5, and a U-shaped recess is formed in the rear frames 4, 4. Since the receiving plates 4b, 4b are provided, the pins 5a, 5a and the receiving plates 4b, 4b can be easily matched by moving the tractor forward, connecting the pipes of the hydraulic cylinder, and then expanding and contracting the hydraulic cylinder. It is possible.

Second, a guide pin 5 guides the left and right support plates 5, 5 to the correct position with respect to the left and right rear frames 4, 4.
Since the guide pins 5a, 5a and the locking pin 21 also serve as fixing pins, the left and right support plates 5, 5 and the left and right rear frames 4, 4 are fixed at these portions by the guide pins 5a, 5a and the locking pin 21. It is possible to do so.

Thirdly, by inserting the locking pin 21 after the pins 5a, 5a match with the receiving plates 4b, 4b, the left and right support plates 5, 5 and the rear frames 4, 4 can be easily connected, and the tool is not necessary.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the tractor with a front loader attached, 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. 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, 4...Rear frame, 4b...
...Support plate, 4'...Boss hole, 5, 5...Support plate, 5
a... Guide pin, 5'... Boss hole, 21... Locking pin, 22... Lock pin, 23... Locking member.

Claims (1)

[Scope of utility model registration request] To the rear frames 4, 4 that stand up from the front axle mounting frame 3,
In the configuration in which the rear support plates 5, 5 of the front loader are attached, guide pins 5a, 5 provided at the upper part of the rear frames 4, 4 and the lower parts of the left and right support plates 5, 5 are installed.
Receiving plates 4b, 4b are provided with U-shaped recesses into which a can be inserted from above, boss holes 4', 4' are provided in the rear frames 4, 4, and left and right support plates 5, 5 are provided. Boss holes 5', 5' are opened in the guide pins 5a, 5a.
A front loader mounting device for a tractor, characterized in that the lower parts of the left and right rear frames 4, 4 and the left and right support plates 5, 5 are fixed by a locking pin 21.