JPH0310208Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a digging bucket for a hydraulic excavator.

All conventional excavation buckets for hydraulic excavators have a wide excavation opening area, so when narrow excavation is required, for example, when burying utility poles or various balls, etc., excavation is often done manually. Additionally, the clam shell type has the disadvantage that horizontal or diagonal drilling is not possible due to its uniaxial support.

In order to improve these points, the present invention miniaturizes the bucket tote, supports it on two axes so that the mounting angle of the bucket can be adjusted in any direction, and uses a double-opening bucket tote with a built-in hydraulic cylinder, which enables excavation that matches the field work. The purpose is to provide bucket carts for shovels.

Describing the embodiment in detail with reference to the drawings, 1 is an arm of a hydraulic excavator, and 2 is a hydraulic cylinder attached to the tip, but in the present invention, it is used only as a cylinder for adjusting the direction of a bucket to be described later. That is, after the piston rod 3 is moved forward or backward according to the working conditions, the rod is brought into a locked state. 4 is a bush link, and 5 is a bucket link, both of which are swingably attached to the tip of the piston rod with a pin 6. The lower end of the bucket link is attached to the arm with a pin 7, and the tip of the bush link is attached to a pair of pins with a pin 8. It is connected to brackets 9 and 9', and the rear lower end of the bracket is attached to the tip of the arm with a pin 10. A pair of small buckets 11, 11' with tapered ends are pivotally attached to the ends of the brackets by pins 12 which can be opened and closed. Reference numeral 13 denotes a cylinder for opening and closing the bucket cart, which is built inside the bracket and its rear end is attached to the rear side of the bracket with a pin 14, and a lever 17 for the upper bucket cart and a lever 18 for the lower bucket cart are attached to the fulcrum pin 16 of the piston rod 15 of the cylinder. Attachment, the tip of each lever is connected to the rear edge of the bucket with pins 19, 20,
Dig when the piston rod extends, and open the bucket when it retracts. Reference numeral 21 denotes rollers attached to both ends of the fulcrum pin of the piston rod, which rotate back and forth along guide rails 22 provided on both the upper and lower stages of the inner surface of the bracket, so that the bucket can be opened and closed very smoothly.

The present invention has the above-mentioned structure, and excavates after adjusting the angle of the bucket by moving the piston rod 3 of the hydraulic cylinder 2 forward and backward, so that it can freely excavate vertical holes, horizontal holes, or diagonal holes according to the working conditions. Since the bucket 11 is small with a tapered tip, it can be used for excavation for burying utility poles, etc., which conventionally required manual labor, and has the advantage of being very efficient. The piston rod 15 of the bucket opening/closing cylinder 13 is its fulcrum pin 1.
Since rollers 21 are attached to both ends of the rod 6 and slide along the guide rails 22, the rod can move forward and backward smoothly, and the bucket can be opened and closed very smoothly. In addition, upper and lower bucket levers 17 and 18 are attached to the tip of the cylinder rod using a fulcrum pin 16, and the cylinder rod excavates when it extends (high thrust) and opens when it contracts (low thrust), improving work efficiency. Win, Bucket 11, 11'
Opening and closing correctly along the center line also improves work efficiency. Next, in the present invention, since the lateral load applied to the cylinder by the bracket 9 is eliminated, there is no need to use an expensive cylinder, which is also economically advantageous. As described above, the present invention has many advantages.

[Brief explanation of the drawing]

An embodiment of the present invention is shown in which FIG. 1 is a side view of the product, and FIG. 2 is a partially cutaway plan view of the product. 2...Hydraulic cylinder, 13...Bucket opening/closing cylinder, 3...Piston rod, 16...Piston rod fulcrum pin, 4...Bush link, 17, 18...Bucket lever, 5...Bucket link, 21... Roller, 9...bracket, 22...guide rail, 11...bucket.

Claims (1)

[Scope of utility model registration request] A bush link 4 and a bucket link 5 are attached to the tip of the piston rod 3 of the hydraulic cylinder 2 attached to the arm 1 of the hydraulic excavator with a pin 6. The tip of the bush link is connected to a pair of brackets with a pin 8, and the bottom end of the bucket link is connected to a pair of brackets with a pin 8. attached to the arm with a pin 7, the rear lower end of the bracket is attached to the tip of the arm with a pin 10, a pair of small bucket bags 11 with tapered tips are pivotally attached to the tip of the bracket with a pin 12 so as to be openable and closable; Attach the rear end of the built-in bucket opening/closing cylinder 13 to the rear side of the bracket using the pin 14, and attach the levers 17 and 18 for the bucket to the fulcrum pin 16 of the piston rod of the cylinder, so that the tip of each lever is attached to the rear side of the bucket. The excavating bucket for a hydraulic excavator is equipped with rollers 21 connected to the fulcrum pins by pins 19 and 20, and rollers 21 sliding along guide rails 22 provided on both upper and lower stages of the inner surface of the bracket are attached to both ends of the fulcrum pin.