JPH0520532B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flexible bucket apparatus for a hydraulic excavator type excavator.

[Conventional technology]

The excavator, which is a hydraulic shovel type excavator used in the field of civil engineering and construction, can be used to excavate a wide variety of works by attaching attachments such as various buckets for excavation or grapples for gripping work to the tip of the arm. can be done efficiently.

Such bathoes are rather adapted for work below the surface of the earth.
The bucket hoe is operated by a boom cylinder, an arm cylinder, and a bucket cylinder, but the only movement of the bucket is to pull it toward you. Furthermore, there is a limit to the pulling motion when the boom or arm is raised.

Furthermore, it would be convenient if the bucket cart could be moved laterally or operated in a pushing direction while attached to the arm, but such movements have not been possible with conventional bucket hoes.

In addition, various types of attachment buckets are manufactured and sold by various companies, but the distance between the centers of the mounting holes on the bucket side is not necessarily constant, and even if the distance between the centers of the mounting holes is several millimeters, If it is different, you will not be able to attach the bucket to the arm.

Furthermore, since the tip of the cylinder that operates the bucket is directly attached to the bucket, the rotation angle of the bucket is limited by the stroke of the piston rod. That is, when the stroke of the piston rod is short, the rotation angle of the bucket becomes small. Therefore, in order to increase the rotation angle of the bucket, it is necessary to lengthen the cylinder, but if the cylinder is lengthened, the cylinder bottom will protrude significantly from the bracket, etc., causing problems such as getting in the way during work.

[Problem to be solved by the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a flexible bucket cart device for a hydraulic bucket cart type excavator that can be mounted even on bucket carts having different center-to-center distances between attachment holes on the bucket cart side.

Another object of the present invention is to provide a flexible bucket belt device for a hydraulic bucket excavator, which allows the bucket to move a large amount even with a small stroke of the piston rod.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a bucket tote device that is used by being attached to the arm of a hydraulic excavator type excavator.
A connecting body is provided with a mounting part for attaching to the tip of the arm and a hydraulic motor for driving the rotating base, and a rotating base is rotatably attached to the connecting body. The bracket is equipped with a base plate having an operating cylinder on the lower side, and a crank-type mounting lever is pivotally mounted on the end of one arm of which the upper end of the adjustment lever is rotatably attached. One end of the attachment part provided on the bucket is attached to the end of the other arm of the attachment lever with a pin, and the tip of the adjustment lever is attached to the other end of the attachment part with a pin. The tip of the actuating cylinder is attached to the mounting lever with a pin, so that the bucket and the mounting lever rotate as a unit about the pivot point. A flexible bucket device for a hydraulic shovel type excavator is provided.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

The device for mounting attachments comprises a coupling body 10. A mounting section 30 is provided at the upper part of the connecting body 10. The mounting portion 30 has mounting plates 34a and 34b provided at a predetermined interval. Mounting holes 36 are provided in the mounting plates 34a and 34b.
a, 37a and mounting holes 36b, 37b are provided, respectively. The mounting holes 36a and 36b are located at the tip of the arm 12 of the backhoe, and the mounting hole 37
a, 37b are attached to the tilt shaft 120, pin 10
3, it is rotatably attached.

A rotating base 50 is rotatably attached to the lower part of the connecting body 10. The rotating base 50 includes a bracket 90 and an actuating cylinder 96, as will be described later.
A substrate 70 is provided on the lower surface side.

The mounting structure between the connecting body 10 and the rotating base 50 is as follows:
It has almost the same structure as the turning circle, which is the attachment structure between the traveling part and the turning part of the backhoe. That is,
As shown in FIG.
have. An inner ring 54 is placed on the lower surface of the fixed base plate 32.
is installed protrudingly. Rotating base plate 52 of the rotating base body 50
An outer ring 58 is provided to protrude from the upper surface.

Grooves 56a and 56b are provided on the outer circumferential surface of the inner ring 54 and the inner circumferential surface of the outer ring 58 to form raceway surfaces,
It has a structure in which rolling elements 61 such as steel balls are interposed on this raceway surface.

A gear 60 is carved on the outer peripheral surface of the outer ring 58. A hydraulic motor 63 is installed in a part of the fixed board 32.
is provided. A gear box 62 containing a built-in gear that meshes with a gear 64 is attached to the drive side of the hydraulic motor 63, and the gear 64 meshes with the gear 60. Therefore, the rotating base 50
is rotated by operating the hydraulic motor 63.

Reference numeral 40 is a swivel joint that can be connected to the attachment side. Reference numeral 38 is a hole for mounting a swivel joint. A board 70 is fixed to the bottom surface of the rotating board 52 with bolts and nuts (not shown).

The board 70 has a mounting plate 72 in which an insertion hole 71 for the swivel joint 40 is provided in the center. Note that it is also possible to use a structure in which the rotating board 52 and the mounting plate 72 are integrally formed.

A bracket 90 is provided on the lower surface of the mounting plate 72. The bracket 90 includes bracket plates 92a and 92b provided in parallel at a predetermined interval.
It is equipped with Bosses 76 and 78 are provided between the bracket plates 92a and 92b. An operating cylinder 96 is rotatably attached to one end of the brackets 92a, 92b by a pin 94.

A crank-type mounting lever 110, in which the upper end of an adjustment lever 110 is rotatably attached to the end of one arm 102b, is attached to the bracket 90.
It is pivoted at 06.

One end of a mounting portion B1 provided on the bucket bag B is attached to the end of the other arm 102a of the attachment lever 100 with a pin 108. Mounting part B1
The tip of the adjustment lever 110 is attached to the other end with a pin 114.

The tip of the actuating cylinder 96 is connected to the mounting lever 1.
00 with pin 116. The bucket B and the attachment lever 100 then rotate as a unit about the pin 106.

In the case of this embodiment, the substrate 70 is the rotating substrate 5
2 and the mounting plate 72, the mounting plate 7
Even if a working part such as a bucket attached to 2 is damaged, it is sufficient to replace only the working part.

[Effect]

(1) Attach the arm 12 and the tip of the tilt shaft 120 provided at the tip of the arm 12 with the pin 103 by aligning the attachment holes 36a, 37a and the attachment holes 36b, 37b.

(2) Connect the oil hose P from the backhoe body to the swivel joint 40 and hydraulic motor 63.

(3) When attaching the attachment lever 100 to the boss 76, move the adjustment lever 100 and attach the tip of the adjustment lever 110 to the other end of the attachment part B1 on the pin 11.
Install in step 4. In other words, even if the distance between the centers of the mounting holes on the bucket side is different, the adjustment lever 11
Since 0 can move freely, it can be attached.

(4) When rotating the bucket B, the piston rod of the operating cylinder 96 is expanded and contracted. When the bucket B is directly attached to the bracket 90, the rotation angle of the bucket B is the same as that of the operating cylinder 96.
is limited by the stroke of the piston rod. That is, when the stroke of the piston rod is short, the rotation angle of the bucket B is small.

However, since the bucket belt B is attached to the bracket 90 via the attachment lever 100, the rotation angle of the bucket belt B becomes large even with a slight stroke of the piston rod, and the bucket belt B can be sufficiently drawn toward the bucket hoe body.

FIG. 4 is an explanatory diagram of the use state in which a grapple G is attached as an attachment to the tip of the backhoe.

When using the grapple G, from the state shown in FIG.
Remove.

The grapple G includes two fixed claws 14 and two movable claws 16, and the movable claws 16 are
It is opened and closed by an actuation cylinder 96 driven by an oil line from the swivel joint 40. According to this, although the grapple G itself is not equipped with a turning device, it can be operated in the same way as using a grapple equipped with a turning device.

〔Effect of the invention〕

The present invention has the above configuration and has the following effects.

(1) Various types of attachment buckets are manufactured and sold by various companies, but the distance between the centers of the attachment holes on the bucket side is not necessarily constant.
If the center-to-center distance differs even by a few millimeters, it will not be possible to attach the bucket to the arm.

However, in the present invention, the upper end of the adjustment lever is rotatably attached to the end of one arm of the mounting lever, so the adjustment lever can be moved even if the distance between the centers of the mounting holes on the bucket side is different. It can be installed by

(2) Since the bucket belt is attached to the bracket via the attachment lever, even a slight stroke of the piston rod increases the rotation angle of the bucket belt, making it possible to sufficiently draw the bucket belt toward the bucket hoe body.

Therefore, even if it is a fluid such as fresh concrete, it is easy to rotate the receiving bucket in front and spill it to the front.

(3) Since it can rotate around the axial direction of the arm, the direction of attachments such as buckets and grapples can be easily changed, making it possible to easily perform horizontal excavation, which was previously impossible with a bucket hoe. The scope of work expands.

[Brief explanation of drawings]

Figure 1 is a schematic explanatory diagram of how the bucket is used with the bucket attached to the tip of the arm of the bucket, and Figure 2 is a diagram showing how the bucket is used.
An exploded perspective view of an embodiment of a device for mounting an attachment having a structure of a mounting part different from that shown in the figure; FIG. 3 is a schematic cross-sectional view of the main parts showing the mounting structure of the connecting body and the rotating base; FIG. 4 is an explanatory view of the use state in which a grapple is attached as an attachment to the tip of the arm of the backhoe. 10...Connection body, 12...Arm, 30...Mounting part, 50...Swivel base, 63...Hydraulic motor,
70... Board, 90... Bracket, 96... Operating cylinder, 100... Mounting lever, 102a
...The other arm, 102b...One arm, 110...
...adjustment lever, B...bucket, B1...attachment part, G...grapple, 108, 114, 116
……pin.

Claims (1)

[Claims] 1. A bucket device for use by being attached to an arm 12 of a hydraulic shovel type excavator, which includes: a mounting portion 3 for mounting on the tip of the arm 12;
0 and a hydraulic motor 63 for driving the rotating base 50; a rotating base 50 rotatably attached to the connecting body 10; the rotating base 50 includes a bracket 90 and an operating cylinder 96; A crank-type mounting lever 100 is pivotally attached to the bracket 90, and the upper end of an adjustment lever 110 is rotatably attached to the end of one arm 102b. One end of the attachment part B1 provided on the bucket bag B1 is attached to the end of the other arm 102a of the attachment lever 100 with a pin 108, and the adjustment lever is attached to the other end of the attachment part B1. 110 is attached with a pin 114, and the tip of the actuating cylinder 96 is attached to the mounting lever 1.
00 with a pin 116, and the bucket belt B and the attachment lever 100 are configured to rotate as a unit around the pivot joint.