JPS5922191Y2 - Shredder with large maximum opening width - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a crusher with a large maximum opening width that can crush concrete structures of various widths.

The crusher used to demolish concrete structures is mounted on a work cart such as a power shovel and is movable.

This type of crusher has one rotary arm pivotally attached to a support plate, with crushing teeth formed at the tip of the rotary arm and the lower end of the support plate, and one type that has two rotary arms attached to the support plate. Currently, there is a type in which the rotary arm is pivoted to the rotary arm, and crushing teeth are formed at the tips of both rotating arms.

All of these types of crushers have a fixed maximum opening width, and there is a certain limit to the width of objects that can be dismantled by the crusher.

On the other hand, the width of the walls and columns of the concrete structure to be demolished is uneven, and some of them are quite wide.

Therefore, if all the crushing work is to be done with as few crushers as possible, the maximum opening width of this type of crusher must be designed to be as large as possible.

However, increasing the maximum opening width requires a long double-acting cylinder, and there are certain limits depending on the dimensions of the double-acting cylinder and the amount of oil supplied.

Additionally, in order to widen the maximum opening width, it is also necessary to lengthen the rotating arm and support plate, and the increased overall weight must not exceed the loadable weight of the power excavator, so there are restrictions in this aspect as well. .

At the same time, if the rotating arm or support plate is too long, it is difficult for the crusher to make small turns, resulting in inefficiency.

Therefore, at present, several types of crushers are used to dismantle one concrete structure into a predetermined shape, or they are used in conjunction with other crushing devices such as breakers.

The purpose of this invention is to provide a crusher whose maximum opening width is larger than the length of the double-acting cylinder and rotating arm, mainly for use in large-sized crushers.

In order to achieve this objective, in the crusher according to this invention, the rotary arm consists of a front part and a rear part, and a second double-acting cylinder is installed between the front part and the rear part.

Next, the embodiment of this invention will be explained based on the drawings.
The figure shows a crusher 2 according to this invention.

The crusher 2 has a pair of support plates 4 of rectangular planes arranged in parallel in the vertical direction, and two rotary arms 6.8 are rotatably supported by a pivot shaft 10 between both support plates.

One rotating arm 6 is integral and has a triangular planar shape.

The other rotary arm 8 is composed of a front part 8a and a rear part 8b, and has a generally triangular planar shape as a whole.

The tip of the rotating arm 6.8 is bent inward to form the crushing tooth 12.
．． 14, and both crushing teeth are tapered and placed opposite each other.

The cylinder case of the first double-acting cylinder 16 is pivotally attached to the rear end of one rotary arm 6, and the piston rod of the cylinder is pivotally attached to the rear end of the other rotary arm 8. 6. The first double-acting cylinder 1 between the rear ends of 8
Install 6.

Further, although the bracket portion 20 is attached to the rear end of the support plate 4 via the rotation mechanism 18, the support plate and the bracket portion may be integrally formed as desired.

This rotation mechanism is constructed by, for example, two disks bolted together, one disk being fixed to the support plate 4 orthogonally, and the other disk being fixed to the bracket part 20.

The bracket part 20 has holes 22 and 24 for mounting the work trolley.
It is preferable that one mounting hole 24 is configured so that its position can be changed depending on the type and size of the work cart.

The second double-acting cylinder 26 is installed between the front part 8a and the rear part 8b of the rotary arm 8, the piston rod of the cylinder is pivotally connected to the rear of the front part 8a, and the cylinder case of the cylinder is attached to the rear of the rotary arm 8. Preferably, it is pivoted in front of the portion 8b.

As shown by the solid line in FIG.
The rear end surface of the front part 8a and the front end surface of the rear part 8b are set so as to be in contact with each other when the front part 6 is contracted.

Further, the length of the first double-acting cylinder 16 is determined so that the crushing teeth 12.14 can approach when both double-acting cylinders 16.26 are extended together (see the dashed line in FIG. 2).

Therefore, when both double-acting cylinders 16.26 are retracted together, the opening width of both rotary arms 6.8 is larger than that of a normal crusher.

For driving both double-acting cylinders 16, 26, it is preferable to use a hydraulic circuit of a power shovel, which is a working vehicle.

Although the crusher 2 according to this invention is mounted on a power shovel 28 as illustrated in FIG. 3, a crawler crane, bulldozer, forklift truck, etc. may also be used as the work vehicle.

In order to dismantle the object 30 by the crusher 2, both double-acting cylinders 16.26 are retracted, and the object 30 is sandwiched between the rotary arms 6.8 and the rotary arm 6.8.

In this case, there is also a type of crusher in which a stopper (not shown) is installed between the support plates 4 to prevent both rotating arms 6.8 from swinging.

Next, when the first double-acting cylinder 16 is extended, the object 30 to be crushed can be partially dismantled as shown in FIG.

After this, when the second double-acting cylinder 26 is extended, the object 30 to be crushed can be completely dismantled.

In addition, if the width of the concrete structure to be crushed is relatively thin, the first double-acting cylinder 16 is stretched in advance and the structure is sandwiched, and then the second double-acting cylinder 2
6 can be expanded to make it easier to divide into small pieces.

4 and 5 show a variation of this invention, in which the rotating arms 34, 36 of the crusher 32 are connected to pivots 38, 40, respectively.
It is rotatably attached to the support plate 4 by
8.40 has a predetermined interval in the horizontal direction.

The first double-acting cylinder 42 is installed between the rear ends of both rotary arms 34.36, and the second double-acting cylinder 44 is installed between the rear ends of both rotary arms 34, 36.
It is installed between the front part 36a and the rear part 36b of 6.

Rotating arm 34 is relatively elongated, and crushing teeth 46 at the distal end of the arm curve inwardly at a smaller angle than crushing teeth 48 of rotating arm 36 .

In the crusher 32, when both double-acting cylinders 42 and 44 are extended and both rotating arms 34 and 36 are rotated, the crushing teeth 46.
Since the tip ends of 48 are not close to each other, it is not suitable for dividing the object into small pieces (see the dashed-dotted line in FIG. 5).

The crusher 32 is preferably used to crush the concrete surface of the passageway, and in this case, the crusher 32 is preferably used to crush the concrete surface of the passage.
6 is inserted under the concrete surface, and the crushing teeth 48 of the rotating arm 36 crush the concrete surface from above.

FIG. 6 shows, in schematic longitudinal section, another variant of this invention, in which the rotary arms 52, 52 of the crusher 50 are respectively connected to the pivots 54, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, and 52, respectively, of the crusher 50, respectively.
54 to be rotatably attached to a support plate 56, and a first double-acting cylinder 58 is installed between the rear ends of the surface rotating arm.

Each of the rotating arms 52.52 consists of a front part 52a and a rear part 52b, and a second part is provided between the front part and the rear part.
Double acting cylinders 60 are installed respectively.

The second double-acting cylinders 60.60 are preferably operated synchronously, so that the extension of both second double-acting cylinders and the first double-acting cylinder 58 brings the two crushing teeth 62.62 into proximity.

The crusher 50 can easily balance the weight between the left and right sides, and can also easily divide objects to be crushed into small pieces.

7 to 9 show further variations of this invention.

In the crusher 64, a pair of parallel support plates 66 have substantially L-shaped side surfaces, and at their distal ends, the pair of plates become a single body and taper to form fixed teeth 68.

Further, a bracket portion 70 is integrally fixed above the support plate 66.

A first double-acting cylinder 72 located approximately horizontally has one end pivotally connected to the rotating arm 74 and the other end pivotally connected to the support plate 66 .

There is only one rotating arm 74 on the side of the inverted triangle,
A second double-acting cylinder 76 is installed between the front part 74a and the rear part 74b.

In the rotary arm 74, the lower apex of the inverted triangle is pivotally connected to the support plate 66, the left apex is pivotally connected to the first double-acting cylinder 72, and the right apex is tapered and crushed. Teeth 78 are formed.

The front part 74a of the rotating arm 74 is connected to the support plate 66.
together with the fixed teeth 68 of the cylinders 72 and 76 to form a right-facing opening, which closes when both double-acting cylinders 72 and 76 are extended (
(See Figure 9).

Although it is not clear from the drawings, the support plate 66 and the rotary arm 74 have a wall thickness sufficient to withstand the crushing operation, and this is the same in the aforementioned crusher.

In the crusher 64, the concrete structure to be crushed is placed between the fixed teeth 68 and the crushing teeth 78, and the first double-acting cylinder 72 is first extended as shown in FIG. 8, and then as shown in FIG. The second double-acting cylinder 76 is extended as shown to fracture the structure.

The crusher 64 is also suitable for use in crushing concrete surfaces of roads.

In the crusher according to this invention, the maximum opening width of the crusher is larger than the dimension of the double-acting cylinder in order to completely close the rotary arm by the extension of the first and second double-acting cylinders.

As a result, even if the width of the walls or columns of the concrete structure to be demolished is large in some areas, it can be demolished using only this crusher without using a breaker or the like, which is economically advantageous.

In addition, in conventional large crushers, the maximum opening width is limited by the dimensions of the double-acting cylinder and the amount of oil supplied, and even if possible, the rotation speed of the rotating arm is slow, or the rotating arm or support plate It became long and it was difficult to do small turning work.

On the other hand, even though the crusher of this invention is large, the double-acting cylinder and rotating arm are short compared to the maximum opening width.
Another advantage is that the rotation speed of the rotary arm is relatively fast.

Therefore, if the crusher of this invention is large-sized, it will be possible to carry out small-turn operations, which were conventionally the field of small-sized crushers, and it will be possible to accomplish the crushing work of several machines with one machine.

[Brief explanation of the drawing]

Figures 1 and 2 are side views of the crusher according to this invention;
Figure 3 is a side view showing the crusher of this invention mounted on a power shovel, Figures 4 and 5 are side views showing a modification of this invention, and Figure 6 is another modification of this invention. FIGS. 7 to 9 are side views showing still another modification of this invention. 2... Crusher, 4... Support plate,
6, 8... Rotating arm, 8a... Front part, 8b... Back part, 10... Pivot,
12.14...Crushing tooth, 16...1st
Double acting cylinder, 26... Second double acting cylinder, 2
8...Power shovel.

Claims (1)

[Claims for Utility Model Registration] 10. A support plate having a bracket portion for mounting on a work cart, a rotating arm disposed between the supporting plates, and a first double-acting cylinder for driving the rotating arm. A crusher having a maximum opening width, characterized in that at least one rotary arm consists of a front part and a rear part, and a second double-acting cylinder is installed between the front part and the rear part. large crusher. 2. In a crusher in which two rotary arms are rotatably attached to a support plate by one pivot, and a first double-acting cylinder is installed between the rear ends of both rotary arms, one of both rotary arms The crusher according to claim 1, wherein a second double-acting cylinder is installed in the crusher. 3. In a crusher in which two rotating arms are each rotatably attached to a support plate by a pivot, and a first double-acting cylinder is installed between the rear ends of both rotating arms, a first double-acting cylinder is attached to one of the two rotating arms. The crushing machine according to claim 1, characterized in that two double-acting cylinders are installed. 4. In a crusher in which two rotary arms are rotatably attached to a support plate and a first double-acting cylinder is installed between the rear ends of both rotary arms, a second
The crusher according to claim 1, which is characterized by being equipped with a double-acting cylinder. 5. One rotary arm is rotatably attached to the support plate, and the first double-acting cylinder has one end pivotally connected to the rotary arm and the other end to the support plate, and the lower end of the support plate is bent. A crusher according to claim 1, which is characterized by forming fixed teeth.