JPH0124214Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an excavator with a discharge bucket used for ground excavation.

[Conventional technology]

Conventionally, as an excavator with a bucket, the
As disclosed in Publication No. 54161, the base end of the elevating boom that is elevated by the elevating cylinder is attached to a column erected on the frame of the vehicle, and a bucket rocker is attached to the tip of the elevating boom. A bucket belt that is swung by a moving cylinder is attached, and the base end of a chain case that is rotated by a chain case rotation cylinder is attached to the side plate of the bucket. A structure is known in which a rotating cutter is attached which is driven via a chain in a chain case.

[The problem that the idea aims to solve]

In the case of the conventional excavator with a bucket belt, the weight of the heavy rotating cutter and the chain case with a hydraulic motor acts on the side plate of the bucket belt, as well as the excavation reaction force from the rotating cutter.
It is necessary to manufacture the bucket to be extremely strong, which causes the problem that the weight of the bucket increases significantly and the manufacturing cost of the bucket increases.

In addition, in the case of the conventional excavator with a bucket,
The base end of the chain case, which is rotated by the chain case rotation cylinder, is attached to the side plate of the bucket belt, which is swung by the bucket rocking cylinder. Since a rotary cutter driven through a chain is attached, the structure for switching between the bucket belt and the rotary cutter is complex, heavy, and expensive to manufacture.

This invention allows the use of a discharge bucket that is lightweight and inexpensive to manufacture, and has a simple and lightweight structure of a switching holding device for switching between the rotary cutting drum and the discharge bucket. The object of the present invention is to provide an excavator with a discharge bucket that can be manufactured at low cost.

[Means to solve the problem]

In order to achieve the above object, the excavator with a discharge bucket of this invention has a bending/extending/elevating boom 1.
A rotary cutting drum 2 is attached to the support member 12 at the tip of the
A holding arm 20 fixed to the base end side of the discharge bucket 3 is pivotally connected to the support member 12 by a horizontal shaft 21 parallel to the rotation axis of the rotary cutting drum 2, and A first pin hole 22 and a second pin hole 23 are provided in one of the holding arm 20 and the support member 12 at an equal distance from the horizontal axis 21 and spaced apart in the circumferential direction of the horizontal axis 21. 20 and support member 1
2, a pin hole 24 is provided at a position that matches the pin holes 22 and 23, and the pin hole 24 is connected to the first pin hole 22 and the second pin hole 23.
A pin 25 is removably inserted through one of the pin holes.

〔Example〕

Next, this invention will be explained in detail using illustrated examples.

The drawing shows an embodiment of this invention, in which a rotating support base 5 is attached to a frame having a crawler 4.
The base end of a first boom 6 is pivotally connected to the swing support base 5 via a horizontal shaft 7, and the middle part of the first boom 6 and the swing support base 5 are connected via an elevation cylinder 8. The proximal end portion of the second boom 9 is pivotally connected to the distal end portion of the first boom 6 via a horizontal shaft 10, and the proximal end portion of the second boom 9 and the first boom 6 are connected to each other.
is connected to the middle part of the second boom 9 via a bending/extending cylinder 11, and furthermore, a support member 12 is connected to the tip of the second boom 9.
The other end of the bending/extending cylinder 14 whose one side on the proximal side is pivoted by the horizontal shaft 13 and whose one end is connected to the proximal side of the second boom 9 and the distal end portion of the second boom 9 and the other side of the proximal end of the support member 12 are connected via links 15 and 16, and the first boom 6, the second boom 9, the support member 12, and each cylinder 8, 11, and 14 allow bending, elongation, and elevation. A boom 1 is configured.

A rotary cutting drum 2 is rotatably attached to the left and right sides of the tip of the support member 12 by a horizontal shaft, and one of the rotary cutting drums has a large number of picks 17 arranged in a left-hand spiral. The other rotary cutting drum has a large number of picks 18 arranged in a right-handed spiral, and the support member 12 is equipped with a hydraulic power source unit (not shown) provided on the rotating support base 5. A hydraulic motor 19 that is driven by hydraulic pressure is fixed, and the hydraulic motor 19 causes each rotary cutting drum 2 to direct the scraps between the left and right drums via a speed reducer (not shown). rotated to

A plate-shaped holding arm 2 is attached to the base end of the discharge bucket 3.
0 is integrally provided, and the bucket opening side portion of the holding arm 20 is pivotally connected to the support member 12 by a horizontal shaft 21 parallel to the rotation of the rotary cutting drum 2.
A first pin hole 22 and a second pin hole 23 located at the same distance from the horizontal axis 21 are provided at a distance from each other in the circumferential direction of the horizontal axis 21. A pin hole 24 is provided at a position that matches the pin holes 22 and 23.

As shown in FIG. 3, when holding the discharge bucket 3 in the upright position, the pin hole 24 of the support member 12
A pin 25 is inserted between the first pin hole 22 of the holding arm 20, and as shown in FIG.
When holding the discharge bucket 3 in the laid down position, the pin hole 24 of the support member 12 and the second
A pin 25 is inserted across the pin hole 23.

FIG. 1 shows an example of excavating hard ground 26 using the excavator with a discharge bucket according to the embodiment, in which the second boom 9, the support member 12, the rotary cutting drum 2, etc. are moved along the horizontal axis by the cylinder 11. 10 in a vertical plane, the rotary cutting drum 2 is rotated with a radius of rotation R. When excavating in this manner, even if the discharge bucket 3 is held in the upright position, it does not come into contact with the hard ground, so the excavation can be carried out without any problem.

With the cylinder 14 extended and the support member 12 bent relative to the second boom 9, the cylinder 11 rotates the second boom 9, the support member 12, the rotary cutting drum 2, etc. around the horizontal axis 10 for excavation. When carrying out this operation, if the discharge bucket 3 is held in an upright position, the discharge bucket 3 may hit the ground, but in such a case, holding the discharge bucket 3 in a laid down position will cause no problem. Excavation can be carried out.

When excavating waste with the excavator equipped with the discharge bucket of the above embodiment, the discharge bucket 3 is held in the upright position, and the support member 12 is moved to the second position by the extension of the cylinder 14, as shown in FIGS.
It is bent against the boom 9, and in this state the cylinder 1
1, the second boom 9, the support member 12, the discharge bucket 3, etc. are rotated in a vertical plane, and the waste is discharged by the discharge bucket.

[Effect of idea]

This idea is structured as described above, so
This produces the effects described below.

Since a heavy object such as a cutting device having a rotating cutting drum is not attached to the discharge bucket 3, the discharge bucket 3 can be used because it is lightweight and can be manufactured at low cost. By simply rotating the pin 25 and inserting it into the pin hole 24 and the first pin hole 22 or the pin hole 24 and the second pin hole 23, the excavator with the discharge bucket can change the cutting state by the rotary cutting drum 2 and the discharge bucket 3.
Since the switching and holding device can be switched to the sludge discharge state according to the method, the structure of the switching and holding device is simple and lightweight, and the switching and holding device can be manufactured at low cost.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, and FIG. 1 is a partially longitudinal side view showing an example of excavation being carried out by an excavator with a discharge bucket, and FIG.
Figure 3 is a plan view showing the vicinity of the rotary cutting drum and discharge bucket in the excavator, Figure 3 is a side view showing the discharge bucket held in the upright position, and Figure 4 shows the discharge bucket and the supporting member with the rotary cutting drum. Figure 5 is a side view showing the discharge bucket held in the laid down position;
The figure is a partially longitudinal side view showing a state in which waste is being discharged by an excavator with a discharge bucket. In the figure, 1 is a bending/extending elevation boom, 2 is a rotating cutting drum, 3 is a discharge bucket, 5 is a rotating support base, and 6
is a first boom, 8 is a cylinder for elevation, 9 is a second boom, 11 is a cylinder for bending and extension, 12 is a support member,
14 is a bending and stretching cylinder; 17 and 18 are picks; 19 is a hydraulic motor; 20 is a holding arm; 21
is the horizontal axis, 22 is the first pin hole, 23 is the second pin hole,
24 is a pin hole, 25 is a pin, and 26 is a hard ground.

Claims (1)

[Scope of utility model registration request] Support member 12 at the tip of the bending/extending/elevating boom 1
In an excavator in which a rotary cutting drum 2 is attached to the excavator, a holding arm 20 fixed to the base end side of the discharge bucket 3 is attached to the support member 12 by a horizontal shaft 21 parallel to the rotation axis of the rotary cutting drum 2. a first pivot mounted on one of the retaining arm 20 and the support member 12 and located equidistant from the transverse axis 21;
A pin hole 22 and a second pin hole 23 are provided at intervals in the circumferential direction of the horizontal shaft 21, and the holding arm 20
A pin hole 24 is provided in the other of the support members 12 at a position that matches the pin holes 22 and 23, and a pin hole 24 and one of the first pin hole 22 and the second pin hole 23 are provided. An excavator with a discharge bucket, in which a pin 25 is inserted through the hole so as to be freely inserted and removed.