JP2534619Y2 - Mounting structure of gripper device for construction machinery - Google Patents

Description

[Detailed description of the invention] << Industrial application field >> This invention attaches to the end of an arm of a hydraulic excavator or the like instead of a bucket, and uses a gripping claw device used for dismantling work of a house or loading scraps. It relates to the mounting structure.

<< Prior Art >> As shown in FIG. 5, this type of gripping claw device includes a bracket 14 fixed to the tip of an arm 1 of a construction machine, and a pair of claws 16 and 20 pivotally supported by the bracket. An opening / closing mechanism 26 for simultaneously moving the pair of claws in the opening or closing direction is provided, and the pawls 16 and 20 are normally opened and closed by the hydraulic cylinder 2 for driving the bucket. Such a grasping claw device 13
Usually, the bracket 14 is fastened to the pin hole of the bucket pivot pin provided on the arm 1 and the pin hole of the lever pivot pin of the bucket drive link by fastening them with screw rods 34, 35 and the like. .

In this mounting work, the bucket is removed by removing the bucket pivot pin and the link pin 18 of the bucket drive link, and further removing the lever pivot pin of the bucket drive link to remove the screw rod.
After fixing the bracket 14 of the gripper device with 34 and 35, the removed lever pivot pin 6 is inserted into the bracket 14, the lever 4 of the bucket drive link is pivoted, and the bucket drive link 11 is gripped on the gripper device. Pin on the connecting body 17 formed on the nail 16
It was connected at 18.

In the above-described structure, the bucket drive link 11 is used as a pawl opening / closing mechanism.
, And the work of connecting the opening and closing mechanism of the gripper device to the hydraulic cylinder 2 is required. The operation of returning the gripping claw device to the bucket is performed in the reverse order of the above.

<< Problems to be Solved by the Invention >> The work of exchanging a bucket of a hydraulic shovel has conventionally been generally performed, and a connection that connects a bucket pivot pin that pivotally connects the bucket to an arm and a bucket drive link. This is the work of removing the bucket by removing the pin 18 and attaching another bucket with these pins. On the other hand, the mounting operation of the gripper device is very troublesome, and since the bucket drive link 11 and the lever 4 which are not usually removed are removed, different types of tools and parts management are required. There was a problem. Further, the distance between the pin hole of the bucket pivot pin and the pin hole of the lever pivot pin of the bucket drive link varies depending on the manufacturer and model, and the position of the mounting hole of the bracket 14 must be changed for each model. was there.

The present invention has been made to solve this problem, and an object of the invention is to provide a mounting structure of a gripping claw device in which the attaching / detaching operation can be performed more easily and the type of use is not limited.

<< Means for Solving the Problems >> The mounting structure of the gripping claw device of the present invention comprises a U-shaped groove 23 having opposing parallel edges provided at the base end of a bracket 14 pivotally supporting the gripping claws 16 and 20. And a block 8 mounted on both ends of the pivot pin 6 of the lever 4 supporting the base end of the bucket drive link 11, and screwed into the through hole 22 of the bracket 14 and the pin hole 12 of the bucket pivot pin. The gripper 13 is attached to the arm 1 of the construction machine by penetrating the rod 34 and fastening the two. The bucket driving link 11 whose base end is pivotally supported by the lever 4 is connected to the pawl 16 or the opening / closing mechanism 26 of the gripper pawl device 13 thus attached, and a pair of pawls is provided.
Open and close 16 and 20 simultaneously in the opening or closing direction.

<< Operation >> In order to attach the gripping claw device 13 having the above-described attachment structure to the tip of the arm 1 instead of the bucket, the bucket pivoting pin and the connecting pin 18 of the bucket drive link are removed, and the bucket is removed. The U-shaped groove 23 is inserted into the blocks 8 attached to both ends of the lever pivot pin 6 of the bucket drive link, and the threaded rod is inserted into the through hole 22 provided in the bracket 14 and the pin hole 12 after the bucket pivot pin is removed. 34, the bracket 14 is fastened, and the bucket driving link 11 is connected to the pawl 16 or the opening / closing mechanism 26 by the connecting pin 18; It can be performed. In addition, since the bucket drive link 11 and its lever 4 are not removed, extra tools and parts management are not required.

<< Embodiment >> FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a side view, and FIG. 3 is a sectional view of A in FIG. It is. In the drawing, 1 is an arm of a hydraulic shovel, 2 is a bucket driving cylinder, 3 is a rod of the cylinder 2, 4 is a lever connected to the rod 3 by a pin 5, and 6 is a lever that pivotally supports the lever 4 to the arm 1. A pivot pin, 7 is a circumferential groove formed at both ends of the pin 6, 8 is a rigid cylindrical block fitted at both ends of the pin 6, 9 is a cylindrical block 8
A notch formed in the peripheral surface of the cylinder, a stop ring fitted into the circumferential groove to prevent the cylindrical block from coming off, and a bucket drive pivotally connected to the tip of the lever by a pin. The link 12 is a pin hole provided at the tip of the arm 1 for pivoting the bucket.

13 is a gripping claw device attached to the tip of the arm, 14 is its bracket, 15 is a support shaft mounted above the tip of the bracket 14, 16 is an upper claw pivotally supported by the support shaft 15, and 17 is an upper claw , A connecting pin connecting the connecting body 17 and the bucket drive link 11, a support shaft 19 mounted below the tip of the bracket 14, and a support shaft 19 The lower claws 21 are provided in the center of the bracket 14 and the guide grooves 22
Is a through hole provided in the base of the bracket 14, 23 is a U-shaped groove formed in the base end of the bracket 14 in a direction parallel to the claws 16, 20, and 24 is provided along the upper and lower edges of the U-shaped groove 23. It is a hard receiving plate.

An opening / closing mechanism 26 for interlocking the pawls 16 and 20 is shown in FIG. 4, wherein 27 is an upper arm projecting obliquely rearward from the base end of the upper pawl 16, and 28 is a pin at the tip of the upper arm 27. An upper link pivotally supported by 29, a lower arm 30 projecting obliquely rearward from the base end of the lower claw 20, and a lower link 31 pivotally supported by a pin 32 at the tip of the lower arm 30, 33 Are pivot pins for pivotally connecting the links 28 and 31. Both ends of the pivot pins are connected to the guide grooves 21 of the bracket.
It is inserted in.

To attach the gripper 13 to the tip of the arm 1, the bucket pivot pin inserted into the pin hole 12 of the arm 1 and the connection pin 18 of the bucket drive link 11 are removed, and the bucket is removed. Next, a U-shaped groove receiving plate 24 is fitted into the notch 9 of the cylindrical block mounted on the pivot pin 6, and
Pin hole after pulling out the through hole 22 and the bucket pivot pin
The bracket 14 is fastened to the tip of the arm by inserting the screw rod 34 into the bracket 12 and the bucket driving link 11 is connected to the connecting member 17 of the upper pawl with the connecting pin 18. In the gripping claw device thus mounted, the bucket driving link 11 receiving the driving force from the hydraulic cylinder opens and closes the upper claw 16, and the pivoting pin 33 slides along the guide groove 21 by this opening and closing operation. Then, the lower nail 20 is opened and closed simultaneously with the upper nail at the same opening angle. When the disassembling operation and the loading operation are completed, the screw rod 34 and the pin 18 are attached and detached, and the gripper device is replaced with a bucket.

<< Effects of the Invention >> As described above, according to the mounting structure of the present invention, the gripping claw device can be attached to the tip of the arm simply by attaching and detaching the two pins, so that the work of exchanging with the bucket becomes easy, Moreover, since there is no need to remove the bucket drive link and its lever, no extra tools and parts management are required.
Further, since the gripping claw device is fixed by a U-shaped groove provided at one end of the bracket, even if the distance between the pin hole of the bucket pivot pin and the pin hole of the lever pivot pin of the bucket drive link is slightly different. Since it is adjustable, there is an effect that it is not limited by the manufacturer or model of the construction machine.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a side view, FIG. 3 is a sectional view of a portion A in FIG. The figure is a sectional view showing the opening and closing mechanism. FIG. 5 is a sectional view showing a conventional example. In the figure, 1: arm, 4: lever 6: pivot pin, 11: bucket drive link 12: pin hole, 13: gripper 14: bracket, 16: upper pawl 20: lower pawl, 22: through hole 23: U-shaped groove, 26: open / close mechanism 34: screw rod

Claims (1)

(57) [Scope of request for utility model registration] A bracket (14) of a gripper device (13) having a pair of claws (16, 20) driven to open and close is connected to a bucket pivot pin hole (12) and a bucket drive link (11). In the mounting structure for fixing to the tip of the arm (1) of the construction machine provided with: a through hole (22) having substantially the same diameter as the bucket pivot pin hole (12) at the base of the bracket (14); U-shaped grooves (23) having opposing edges parallel to each other in substantially the same direction as the claws (16, 20) of the bucket drive link (1) are provided.
Blocks (8) are mounted on both ends of a pivot pin (16) of a lever (4) supporting a base end of 1), and the U-shaped groove (23) is fitted into the block (8). A mounting structure for a gripping claw device of a construction machine, wherein a screw rod (34) is passed through the through hole (22) and the bucket pivot pin hole (12) and fastened and fixed.