JPH0242760Y2 - - Google Patents

Description

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

Conventionally, when hard ground is excavated using an excavator equipped with a bending/extending/elevating boom and a rotary cutting drum attached to the tip of the boom, waste (excavated debris) is discharged using a separate discharge machine. In other words, it is uneconomical because it requires two machines, an excavator and an ejector.

It is also conceivable that after excavating with the excavator, the rotary cutting drum of the excavator is removed and a discharge bucket is attached in its place, and the waste is discharged using the discharge bucket. Since the rotary cutting drum and the discharge bucket must be attached and replaced, a considerable amount of labor is required and the replacement work takes a relatively long time, resulting in a problem of low excavation and discharge efficiency.

This invention provides an excavator with a discharge bucket that has a bucket position switching fixing device that can advantageously solve the above-mentioned problems, prevent the bucket position switching fixing pin from falling off, and quickly change the bucket position. The purpose is to provide

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

The drawing shows one embodiment of this invention, in which a rotating support stand 12 is attached to a frame having a crawler 11, and a first
The base end of the boom 13 is pivotally connected to the horizontal shaft 14,
The intermediate portion of the first boom 13 and the rotating support base 12 are connected via an elevation cylinder 15, and the proximal portion of the second boom 16 is pivoted to the tip of the first boom 13 by a horizontal shaft 17. and the second boom 16
The proximal end of the support member 19 and the intermediate part of the first boom 13 are connected via a bending/extending cylinder 18 , and one proximal side of the support member 19 is pivotally connected to the distal end of the second boom 16 by a horizontal shaft 20 . a bending/extending cylinder 21 which is mounted on the body and has one end connected to the base end side of the second boom 16;
The other end, the distal end portion of the second boom 16, and the other proximal side portion of the support member 19 are connected to a link 22,
23, the first boom 13, second boom 16, support member 19 and each cylinder 1
5, 18, and 21 constitute a bending/extending/elevating boom 1.

A rotary cutting drum 2 is rotatably attached to the left and right sides of the tip of the support member 19 by a horizontal shaft, and one of the rotary cutting drums has a large number of picks 24 attached in a left-handed spiral pattern. , and the other rotary cutting drum has a large number of picks 25 arranged in a right-hand spiral pattern, and the support member 19 is equipped with a hydraulic power unit (not shown) provided on the rotating support base 12. A hydraulic motor 26 driven by hydraulic pressure from the rotor is fixed, and each rotary cutting drum 2 is rotated by the hydraulic motor 26 via a speed reducer (not shown) in a direction to scrape scraps toward the center of the drum.

A plate-shaped holding arm 4 is integrally provided on the base end side of the discharge bucket 3, and the middle part of the holding arm 4 is pivotally connected to the support member 19 by a horizontal shaft 5, and the base end of the holding arm 4 is A pin engaging part 6 for fixing the bucket in the upright position, which is a circular hole, is provided on the side, and a pin engaging part 7, which is a semicircular recess, is provided at the tip of the holding arm 4, for fixing the bucket in the collapsed position. Each of the pin engaging portions 6 and 7 is connected to the horizontal shaft 5.
are placed equidistant from.

The pin 9, which has a circular cross section, is provided with an engagement portion 8 for preventing extraction in the middle thereof, and is formed of an annular groove, and an engagement portion 27 for retaining the insertion position consisting of an annular flange is provided at the base end of the pin 9. An operating annular portion 28 is integrally provided, and the pin 9 is slidably inserted into a support member 19, and a handle 2 is provided on the support member 19.
An engaging member 10 having a locking member 10 is attached to the pin 9 so as to be movable forward and backward, and a spring 30 is engaged with the locking member 10 to press the locking member 10 toward the pin 9.

3 and 5 show the discharge bucket 3 fixed in the upright position. In this state, the pin 9 is fitted into the pin engagement part 6 for fixing the bucket upright position, and the engagement part 27 for holding the insertion position is engaged with the locking member 10, so the pin 9 is not inserted. held in position.

When pulling out the pin 9 from the pin engagement part 6 of the holding arm 4, move the locking member 10 in the direction away from the pin 9 and remove it from the insertion position holding engagement part 27, and then remove the pin 9 from the insertion position holding engagement part 27. Pull it out. FIG. 6 shows the state in which the pin 9 has been pulled out from the pin engaging portion 6. In this state, the locking member 10 is engaged with the pull-out prevention engaging portion 8, so there is no fear that the pin 9 will slip out of the support member 19 and fall.

When switching the discharge bucket 3 from the upright fixed state to the fallen fixed state, pull out the pin 9 from the pin engagement part 6 for fixing the bucket upright position, rotate the discharge bucket 3 from the upright position to the lowered position, and then remove the pin 9. 9 into the pin engaging portion 7 for fixing the bucket in the collapsed position. In this case as well, the insertion position holding engagement portion 27
is engaged with the locking member 10, so that the pin 9 is held so as not to come off from the pin engaging portion 7.

When switching the discharge bucket 3 from the fixed position in the reclining position to the fixed state in the upright position, after pulling out the pin 9 from the pin engagement part 7 for fixing the position of the bucket in the reclined position, rotate the discharge bucket 3 from the reclined position to the upright position, and then 9 into the pin engaging portion 6 for fixing the bucket upright position.

When rotating the discharge bucket 3 from the upright position to the collapsed position, the discharge bucket 3 can be rotated by utilizing its own weight by shortening one or both of the bending cylinders 18, 21. In addition, when rotating the discharge bucket 3 from the down position to the upright position, by extending one or both of the bending cylinders 18 and 21,
The discharge bucket 3 can be rotated using its own weight.

As shown in FIGS. 5 and 6, the pull-out prevention engaging portion 8 is an annular groove having a slope that gradually becomes deeper toward the tip end of the pin, and the insertion position retaining engaging portion 27 is formed as a ring groove. If the flange is an annular flange having a slope whose diameter gradually decreases toward the middle side, and the slope is formed on the outside of the tip of the locking member 10, the pin 9 can be pulled out in the pin pulling position shown in FIG. By pressing strongly, the locking member 10 is automatically pressed and moved against the force of the spring 30, and the engagement portion 8 for preventing extraction is moved.
The locking member 10 can be removed from the holder. Also, when inserting pin 9 to the specified bucket fixing position,
After the insertion position holding engagement portion 27 abuts against the locking member 10, by strongly pressing the pin 9, the locking member 10 is automatically pressed and moved against the force of the spring 30, and then The moment the engaging portion 27 passes the engaging surface of the locking member 10, the force of the spring 30 moves the locking member 10 toward the pin 9, and the engaging portion 27 is automatically moved toward the locking member 10. It can be brought into a state where it can be engaged with.

FIG. 1 shows an example of excavating hard ground 31 with the excavator equipped with a discharge bucket according to the embodiment, in which the discharge bucket 3 is fixed in a laid down position, and the second boom 16 is moved by the bending cylinder 18. , the support member 19, the rotary cutting drum 2, etc. are rotated in a vertical plane about the horizontal axis 17, and the rotary cutting drum 2 is rotated with a radius of rotation R.

When excavating waste using the excavator with the discharge bucket of the embodiment described above, the discharge bucket 3 is fixed in the upright position, and the support member 19 is moved to the second position by the extension of the cylinder 21, as shown in FIGS. 3 and 8.
It is bent with respect to the boom 16, and in this state, the second boom 16, the support member 19, the discharge bucket 3, etc. are rotated in a vertical plane by the cylinder 18, and the waste is discharged by the discharge bucket.

In the case of the above embodiment, the pair of holding arms 4 provided on both sides of the discharge bucket 3 in the width direction are connected to the support member 1.
The locking member 10 is movably attached to the support member 19, but the locking member 10 is not configured in this way, and is provided on both sides of the discharge bucket 3 in the width direction. The pair of holding arms 4 may be arranged outside the support member 19 and pivotally connected by the horizontal shaft 20, and the locking member 10 may be movably attached to the holding arms 4.

According to this invention, in an excavator equipped with a bending and elevating boom 1 and a rotary cutting drum 2 attached to the tip thereof, a discharge bucket 3 is placed on the tip side of the bending and elevating boom 1 in the upright and laid down positions. Since the rotary cutting drum 2 is rotated to excavate hard ground, the discharge bucket 3 can be held in the upright position and the discharge bucket 3 can be rotated by the bending and elevating boom 1. This allows the excavated waste to be easily discharged, and therefore, one excavator with a discharge bucket can be used to perform excavation and waste discharge. 2
It is more economical than using a single machine,
In addition, compared to the case where the rotary cutting drum and the discharge bucket are changed to switch to the excavation state and the waste discharge state, the initial change can be performed easily and quickly, and therefore the excavation and discharge efficiency can be improved. In particular, in the case of this invention, a pin engaging portion 6 for fixing the bucket upright position and a pin engaging portion for fixing the falling bucket position are provided on one of the holding arm 4 of the discharge bucket 3 and the distal end portion of the bending/extending/elevating boom 1. 7 is provided on the other of the holding arm 4 and the distal end portion of the bending/extending/elevating boom 1,
A switching fixing pin 9 having an engagement portion 8 for preventing extraction is slidably inserted therein, and a locking member 10 is provided to be detachably engaged with the engagement portion 8 for preventing extraction. Therefore, when switching the position of the discharge bucket 3, move the switching fixing pin 9 in the pulling direction and pull it out from the pin engaging part 6 for fixing the bucket upright position or the pin engaging part 7 for fixing the bucket falling position. The engagement between the pull-out prevention engaging portion 8 and the locking member 10 prevents the switch-fixing pin 9 from moving in the pull-out direction. 4, there is no need to completely remove it from both sides and then reinsert it. Therefore, the position of the discharge bucket 3 can be changed easily and quickly, and the switching fixing pin 9 can be prevented from falling off or being lost. Effects such as prevention can be obtained.

[Brief explanation of the drawing]

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.
The figure 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 fixed in an upright position, and Figure 4 is a diagram showing the discharge bucket as a support member with a rotary cutting drum. FIG. 5 is a vertical sectional front view showing the ejecting bucket erecting fixing part, and FIG. 6 is a partial longitudinal sectional front view showing the state in which the pin is removed from the pin engagement part for fixing the erecting position of the ejecting bucket. , Figure 7 is a side view showing the state in which the discharge bucket is fixed 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/elevating boom, 2 is a rotating cutting drum, 3 is a discharge bucket, 4 is a holding arm, and 5
is a horizontal axis, 6 is a pin engagement part for fixing the bucket upright position, 7 is a pin engagement part for fixing the bucket in the lowered position, 8
9 is the engagement part for preventing extraction, 9 is the switching fixing pin, 10 is
is a locking member, 12 is a rotating support base, 13 is a first boom, 15 is an elevation cylinder, 16 is a second boom,
18 is a bending/extending cylinder, 19 is a support member, 21 is a bending/extending cylinder, 27 is an engagement part for holding the insertion position,
28 is an annular portion for operating the pin, 29 is a handle, and 30 is a spring.

Claims (1)

[Scope of utility model registration request] In an excavator equipped with a bending and elevating boom 1 and a rotary cutting drum 2 attached to the tip thereof, a holding arm 4 of a discharge bucket 3 is pivotally attached to the tip side of the bending and elevating boom 1 by a horizontal shaft 5. , a pin engaging portion 6 for fixing the bucket upright position and a pin engaging portion 7 for fixing the bucket lodging position are provided on one of the distal end portions of the holding arm 4 and the bending/extending/elevating boom 1. A switching fixing pin 9 having an engagement portion 8 for preventing extraction is slidably inserted into the other end portion of the bending/extending/elevating boom 1 . A locking member 10 that is removably engaged
An excavator with a discharge bucket, characterized in that the excavator is equipped with a discharge bucket.