JPH0446027Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a structure for attaching a tip attachment to a main body arm of a construction machine such as a fork grab used for dismantling wooden houses, transporting wood, etc.

[Prior Art] The tip attachment of construction machinery is made of strong thick plate steel, and when the arm and attachment are combined, the thickness of these plates is more than 50 mm, and the pitch between the mounting holes is 1 mm apart. Even if the bolt is inserted, it will not be possible to insert the bolt. Therefore, the distance between the mounting holes is adjusted by making the mounting holes blank and fitting eccentric bushings into them. However, the solution using the eccentric bush as described above has a limited adjustment range for the mounting hole spacing, and is completely useless for different models. Even if the spacing between the mounting holes did not match slightly, it always took almost a day to make the cutting adjustments because the board was so thick as mentioned above. Furthermore, when the tip attachment actuating cylinder is installed, the cylinder rod, which expands and contracts through a quadrilateral link, is generally exposed, so it is highly susceptible to damage from collisions with demolished objects during house demolition.

[Problem that the idea aims to solve]

This invention has been devised to the mounting part between the tip attachment and the arm of construction machinery, allowing for freely adjustable mounting even if there is an error in the mounting hole spacing or if there are significant differences between different models. We considered structures such as this, as well as structures that would cause less interference from dismantled objects.

[Means to solve the problem]

In the present invention, the following connection structure was adopted as a means to solve the above problems. In other words, a mounting hole 14 for the arm is provided at the base of a substantially triangular mounting body plate 3 with a tip attachment that opens and closes up and down, such as a house demolition machine, pivoted at the apex, and a link is provided at a position offset from the longitudinal direction of the operating piece. A shaft hole 15 is provided, and the arm end mounting hole 20 of the two arm end mounting holes 20 and the arm base mounting hole 16 is aligned with the mounting hole 14 of the main body plate 3, and the link shaft hole 15 and the arm What is the original mounting hole 16? Mounting link 1
The upper and lower claws 1 and 2 are pivotally supported on the tip rotation shaft 4 of the main body plate 3, and the upper opening/closing link 5 and the lower opening/closing link 6 are connected to the middle part of these claws. The rear ends of both links are joined together and supported by a sliding shaft 10 that slides inside sliding guides 9, 9 on the inner surface of the main body plates 3, 3.
The feature is that the rod 11 of the actuating cylinder is connected to the rod 11 of the actuating cylinder.

[Effect]

By configuring the present invention as described above,
Regardless of the error between the two mounting holes at the end of the arm and the two mounting holes on the end attachment, or the difference in model, it is possible to easily connect them. In addition, since the sliding shaft 10 moves forward and backward according to the sliding guide 9 on the inner surface of the main body plate 3, the cylinder stroke can be shortened, and the rod 11 of the operating cylinder connected to the sliding shaft 10 is always inside the main body plate 3. Exist and advance and retreat. Therefore, there is no interference of the opening/closing link, the sliding shaft 10, the rod 11, etc. with respect to the object to be dismantled.

【Example】

The drawings show an embodiment of the tip attachment connection structure for a construction machine according to the present invention, and FIG. 1 is a side view of the structure applied to a fork grab, and FIG. 2 is a front view of the same. This item has 5 claws alternately acting as actuating pieces.
The upper claw 1 and the lower claw 2 are divided into three parts, and are pivotally supported on the tip rotation shaft 4 of the main body plate 3, and in the middle part of the claw, the upper opening/closing link 5 and the lower opening/closing link 6 are attached to the shaft of a bearing 7. 8, and the rear ends of both links are united and pivotally supported by a sliding shaft 10 that slides within sliding guides 9, 9 on the inner surfaces of the main body plates 3, 3. A rod 11 of an operating cylinder is connected to this sliding shaft 10. Here, by extending the upper opening/closing link 5 or the lower opening/closing link 6 further rearward from the sliding shaft 10 along the sliding guide 9, the cylinder stroke can be shortened. In the present invention, the shape of the mounting body plate 3 is unique. As is clear from the side view of FIG. 1, the main body plate 3 has a substantially triangular shape, and mounting holes are provided at each of its apexes. The arm end attachment hole 14 of the arm 13 of the construction machine and the link shaft hole 15 are located at the rear upper end. The main body plate 3 and the arm 13 are pivotally supported only through the arm tip mounting hole 14, and the arm base mounting hole 16 of the arm 13 is connected to the link shaft hole 1 at the rear upper end.
The main body plate 3 and the arm 13 are attached and fixed by the attachment link 17 connected between the body plate 3 and the arm 13.
Attach the middle part of the mounting link to the forward/reverse screw tanbuckle 18.
The direction of the arm 13 and the claws 1 and 2 is adjusted by adjusting the length of the link. In this way, arm 1
3 and the main body plate 3 of the tip attachment.
Since the connection is made in the form of a triangular fixed link via the mounting link 17, errors in hole pitch can be avoided, unlike the conventional case where bolts are inserted directly into each of the two arm mounting holes and the main body plate mounting hole. The result is that you don't have to worry about it. Fig. 3 shows an example in which the connection structure of the present invention is adopted for an extension arm 19 to be added to an arm when the arm of a construction machine alone is insufficient in length. is 2 in the longitudinal direction
The individual mounting holes are made into one arm end mounting hole 14, and a link shaft hole 15 is provided at a position offset from the longitudinal direction of the extension arm, and this link shaft hole 15 and the arm base mounting hole 16 of the arm are connected. Mounting link 1 between
7 to form a triangular fixed link.

[Effect of the idea]

Because of the above-mentioned construction machine tip attachment connection structure, as mentioned above, it is possible to install the tip attachment and the arm without worrying about the pitch between each mounting hole, and as a result,
The labor and time required for installation can be greatly reduced, and tip attachments can be replaced extremely easily. In addition, the structure around the opening/closing link is not as complex as in conventional models, the cylinder stroke can be designed to be short, reducing costs, and there is no interference between the opening/closing link, sliding shaft, rod, etc. to be dismantled, making it difficult to break down. It has a structure.

[Brief explanation of the drawing]

FIG. 1 is a side view of the fork grab, FIG. 2 is a plan view thereof, and FIG. 3 is a side view of the extension arm. 1... Upper claw, 2... Lower claw, 3... Main body plate, 4... Tip rotation shaft, 5... Upper opening/closing link, 6
...Lower opening/closing link, 7...Bearing, 8...Shaft, 9...
...Sliding guide, 10...Sliding shaft, 11...Cylinder rod, 12...Claw rotation shaft hole, 13...Arm, 14...Arm tip mounting hole, 15...Link shaft hole, 16...Arm base Mounting hole, 17... Mounting link, 18... Tambuckle, 19... Extension arm.

Claims (1)

[Scope of utility model registration request] A mounting hole 14 for the arm is provided at the base of the approximately triangular mounting body plate 3, on which a tip attachment that opens and closes vertically, such as a house demolition machine, is pivotally supported at the apex, and a link shaft hole is provided at a position offset from the longitudinal direction of the operating piece. 15, the arm end mounting hole 20 of the two arm end mounting holes 20 at the arm end and the arm base mounting hole 16 is aligned with the mounting hole 14 of the main body plate 3, and the link shaft hole 15 and the arm base mounting hole 20 are aligned with the mounting hole 14 of the main body plate 3. The hole 16 is connected to a triangular fixed link via a mounting link 17, and the upper and lower claws 1 and 2 are pivotally supported on the tip rotation shaft 4 of the main body plate 3, and the upper opening/closing link 5 and the lower The opening/closing link 6 is connected, and the rear ends of both links are joined together and supported by a sliding shaft 10 that slides inside the sliding guides 9, 9 on the inner surface of the main body plates 3, 3. A tip attachment connection structure for a construction machine, characterized in that a rod 11 of an operating cylinder is connected to a rod 10.