JP3066570U - Concrete crushing bucket - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To solve the problems of cost and enlargement of bucket due to heavy weight of crushing teeth in a bucket of a hydraulic excavator. SOLUTION: In a hydraulic bucket, a large-diameter crushing main roll is mounted in a bucket so as to be able to rotate forward and reverse by a motor, and two small-diameter crushing auxiliary rolls are mounted on both sides thereof. A concrete crushing bucket that crushes concrete blocks into fine particles by rotating the auxiliary crushing rolls forward and backward in response to the rotation of the main roll, so that the concrete blocks can be sprayed through the holes provided at the bottom of the bucket.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a crusher for crushing concrete lumps and other solid wastes mainly in a demolition work of a building such as a building or a block, and particularly relates to an improvement of a bucket in an excavator.

[0002]

[Prior art]

 Conventionally, when a building is demolished, there is a large amount of stone and concrete material (processed material) that has been finely crushed into sand at the site and reused as embankment. ing. In this case, separating the power shovel and the crusher will not improve the efficiency.In recent years, a rotary crusher has been installed on the arm of a hydraulic excavator such as a power shovel to improve work efficiency and reduce construction costs. That is being done. For example, see JP-A-9-267049 and JP-A-10-168927.

[0003]

[Problems to be solved by the invention]

 In these conventional techniques, a large concrete block is finely divided by a single operation by arranging a pair of large-diameter rotor teeth provided with acute-angled teeth on the surface of the rotor shaft so that the irregularities of the teeth mesh with each other. It is intended to be crushed and sprayed, and has a certain effect. However, in the conventional techniques, the bucket is very large, the weight of the bucket is large, and the size of the apparatus is large. Therefore, the teeth of the bucket itself are expensive, and the replacement of the bucket is a very complicated operation. The work was inefficient.

[0004]

[Means for solving the problem]

 The present invention was made as a result of intensive studies to solve such problems, and the outline is as described below.

[0005] A first aspect of the present invention is to provide a bucket for a hydraulic excavator, wherein a large-diameter main crushing roll having crushing teeth substantially in the center of the bucket is rotatably mounted in a forward / reverse direction by a rotor, and A pair of small-diameter crushing auxiliary rolls meshing with the pair of crushing auxiliary rolls were provided before and after, and a discharge section for discharging crushed concrete fine particles was provided in a lower bucket portion of the crushing main roll and the crushing auxiliary roll. This is a concrete crushing bucket. According to a second aspect of the present invention, there is provided a concrete crushing bucket according to the first aspect, wherein a pressing plate for suppressing a concrete block to be crushed is provided on the upper surface side of the main crushing roll and the auxiliary crushing roll. is there. Furthermore, the invention of claim 3 is characterized in that the crushing main roll and the crushing auxiliary roll are provided with gentle spiral crushing teeth notched grooves on the surface. It is a bucket.

[0006]

[Embodiment of the invention]

 The present invention will be described below with reference to an illustrated example. FIG. 1 is a side view of a power shovel to which a rotary crusher according to the present invention is attached. A rotary crusher 11 is detachably attached to the tip of an arm 14 of a power shovel 13 having a traveling device 12 on an endless track.

FIG. 2 shows the bucket 1 of the present invention, which is attached to the tip of the operating arm 3 of the power shovel. At the same time, referring to the side view of FIG. 3 (A), the sectional view of FIG. 3 (B), the sectional view of FIG. 5 (A), and the side view of FIG. A rotative shaft 4a is supported at a central portion on the bottom side of the shovel-shaped portion 2, and a main crushing roll 4 provided with crushing teeth 4b around the rotary shaft 4a is connected to a hydraulic motor 10 to correct the rotation. Reverse rotation can be achieved. The slit portion 4c is provided between the plurality of crushing teeth 4b, and the slit portion 4c of the crushing tooth 4b is provided in a gentle spiral shape.

A side view of FIG. 4A and a cross-sectional view of FIG. 4B relating to the crushing auxiliary roll will be described with reference to FIG. 2. The pair of crushing auxiliary rolls 5 The auxiliary teeth 5b and the slits 5c are provided around the rotation shaft 5a, and the slits 5c of the auxiliary teeth 5b are provided in a gentle spiral form.

Further, as shown in FIG. 5, the relationship between the main crushing roll and the auxiliary crushing roll is such that the main crushing roll 4 is rotated forward and reverse by a hydraulic motor, but the auxiliary crushing roll 5 is connected to a rotating shaft. Without providing a separate hydraulic motor directly, the auxiliary teeth 5b are merely engaged with the crushing teeth 4b of the crushing main roll 4, and the crushing is performed in accordance with the rotation of the crushing main roll 4, and the crushing is performed. When the concrete block to be reached comes from the upper side, it is easily crushed by the forward and reverse rotation of the two, moves downward as fine particles, and is discharged to the lower part from between the slits of both rolls. In addition, the ratio of the diameter of the main crushing roll to the diameter of the auxiliary crushing roll can be sufficiently achieved if the ratio is 2: 1 or less.

Further, as shown in FIG. 2, a discharge hole 1a is provided at the bottom of the shovel-shaped portion 2 at the bottom of the bucket 1 below the main crushing roll and the auxiliary crushing roll. The discharged particles are discharged to the outside, so that they can be dispersed at any location by moving the power shovel while working. The discharge hole 1a may be a single large hole as a whole, or may be provided with a large number of holes having a size slightly larger than the particle diameter generated by the crushing as necessary.

As shown in FIG. 2, the large concrete block before crushing is connected to the operating arm 3 via the connecting rod 7 as needed, so that the mass of concrete jumps up. Can be prevented.

[0012]

[Effect of the invention]

 According to the present invention, since there is only one heavy crushing main roll in the bucket, it is much smaller than the conventional one having a pair of crushing rolls having a large diameter, and the weight is reduced. The crusher can be made a small shovel machine as a whole, and the concrete block can be easily crushed into fine particles by the cooperation of two small-diameter crushing auxiliary rolls. The replacement of the teeth of the main roll and the auxiliary roll for crushing itself has various advantages such as being extremely easy due to the light weight of the teeth.

[Brief description of the drawings]

FIG. 1 is an overall side sectional view of the rotary crusher of the present invention.

FIG. 2 is a side sectional view of a main part of the concrete crushing bucket of the present invention.

FIG. 3 is a side view of the main crushing roll used in the concrete crushing bucket of the present invention.

FIG. 4 is a side view of an auxiliary roll for crushing used in the concrete crushing bucket of the present invention.

FIG. 5 is a sectional explanatory view showing a state in which the main crushing roll and the auxiliary crushing roll are engaged with each other in the concrete crushing bucket of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bucket 1a Discharge hole 2 Shovel-shaped part 3 Operating arm 4 Main roll 4 for crushing 4a Rotating shaft 4b Crushing teeth 4c Slit 5 Auxiliary roll for crushing 5a Rotating shaft 5b Crushing teeth 5c Slit 6 Holding plate 7 Connecting rod 10 Hydraulic motor 11 Rotary crusher 12 Endless track running device 13 Power shovel 14 Arm

Claims (3)

[Utility model registration claims] In a bucket of a hydraulic excavator, a large-diameter main crushing roll having crushing teeth substantially in the center of the bucket is rotatably mounted in a forward / reverse direction by a rotor, and before and after this. A concrete comprising a pair of small-diameter crushing auxiliary rolls that mesh with each other, and a discharge section for discharging crushed concrete fine particles is provided at a lower bucket portion of the crushing main roll and the crushing auxiliary roll. Crush bucket. 2. The concrete crushing bucket according to claim 1, wherein a pressing plate for suppressing a concrete block to be crushed is provided on an upper surface side of the main crushing roll and the auxiliary crushing roll. 3. The concrete crushing bucket according to claim 1, wherein the crushing main roll and the crushing auxiliary roll are provided with gently spiral crushing tooth notch grooves on the surface.