JPS6123048Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for crushing concrete or asphalt, which is the surface material of paved roads, while minimizing vibration and noise.

Conventional crushing equipment is equipped with a movable blade that moves relative to a fixed blade, which is attached to the tip of the boom of a power shovel, etc., and as the boom moves, the fixed blade is inserted into the underside of the roadbed, etc. A movable blade presses the top surface of the roadbed to crush it. However, with this device, it is difficult to insert the fixed blade into the underside of the road, and if you try to insert the fixed blade deeply, the power shovel body will lift off the road surface and fall at the same time as the shredding, causing extremely large vibrations and noise. However, crushing work cannot be carried out in areas where vibration and noise are restricted, such as in residential areas or near hospitals, or areas where pedestrian bridges are being constructed.

This idea eliminates the fixed blade and arranges the upper and lower blades to be movable with respect to the base.The upper blade is driven to rotate by a hydraulic cylinder, and along with this, the lower blade is moved halfway through its rotation. It is configured to rotate and stop, thereby making it easier to insert the lower blade into the roadbed, ensuring that the roadbed is pulled up, and crushing effectively without noise or vibration. The purpose of the present invention is to provide a new road pavement crushing device that can be used to crush road pavements.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a support frame as a base body, which consists of two fixed plates 2 and 3, the upper end of which is attached to the tip of a boom of a power shovel or the like.

Reference numeral 5 denotes an upper blade body, which is pivotally connected between the support frames 1 by a pin 6, and has a bearing part 7 through which the pin 6 is inserted, as shown in FIG. A plate part 9 having a crushing part 8 protruding leftward at its upper end, a hydraulic cylinder mounting plate part 10 (described later) which is integrally fixed to the back of this plate part and has a U-shape when viewed from the plane, and a bearing part. 7 and a pair of engaging arms 11a and 11b extending rearward and downward.

13 is a head-side trunnion-type double-acting hydraulic cylinder, in which the trunnion 14 is pivotally attached to the mounting plate portion 10 of the upper blade body 5, and the tip of the piston rod 15 is pivoted to a pin 16 fixed between the support frame 1. The upper blade body 5 is rotated counterclockwise by extending the piston rod 15.

Reference numeral 8 denotes an arc-shaped lower blade body, the central part of which is pivotally connected between the lower ends of the support frame 1 by a pin 19, a wedge-shaped cutting edge 20 is formed at the front end, and a medium-wide plate on the bottom thereof. body 21 is fixed and pin 1
A plate portion 23 on the rear end side of the bearing portion 22 through which the shaft 9 is inserted is located between the engagement arms 11a and 11b of the upper blade body, and a plate portion 23 on the rear end side is provided with a bridge between the tips of the engagement arms. An engagement elongated hole 25 into which the pin 24 engages is formed.

The engagement elongated hole 25 includes a linear hole 26 and an arcuate hole 27, and is provided so that the linear hole 26 is on the bearing 22 side.

When the cylinder is extended from the state shown in FIG. 2 in which the pin 24 is engaged with the linear hole 26, the upper blade body 5 rotates approximately 20 degrees counterclockwise from the state shown by the solid line. When the lower blade body 18 rotates approximately 15 degrees clockwise and the upper blade body 5 rotates more than 20 degrees, the pin 24
is engaged with the hole 27, and the rotation of the lower blade body 18 is stopped. A bearing 28 is attached to the outer periphery of the pin 24 so that the pin 24 can move smoothly.

The operation of the above proposed configuration will be explained next. First, in the state shown by the solid line in FIG.
Insert below 0.

From this state, when the hydraulic cylinder 13 is actuated to extend the piston rod 15, the upper blade body 5 rotates counterclockwise, and its engagement arm 11a,
Since the pin 24 of 11b is engaged with the hole 26 of the lower blade body 18, the lower blade body 18 rotates clockwise,
Using the plate portion 21 on the bottom as a lever, the roadbed 30 is pulled upward and peeled off from the roadbed. At this time, the lower blade body 1
Since the lever 8 acts as a lever, the support frame 1 does not move, and therefore a support device such as a power shovel does not float up.

When the upper blade body 5 rotates by a predetermined angle or more, the rotation of the lower blade body 18 is stopped, and the roadbed 30 is crushed by the upper blade body 5. Even during this crushing, since the upper blade body 5 only rotates, the support frame 1 and the support device will not be lifted up.

When the crushing is completed, the hydraulic cylinder 13 is operated in reverse to contract the piston rod 15 and the upper blade body 5 is
is rotated clockwise and the lower blade body 18 is rotated counterclockwise to return to its original position. In addition,
If the lower blade body 18 is only slightly inserted under the roadbed 30, it can be easily inserted by raising the roadbed 30 and then inserting the lower blade body 18 deep.

As described above, according to the present invention, the upper blade body and the lower blade body rotate together to crush the road surface material, but before the road surface material is crushed, the lower blade body crushes the road surface material. The material is pulled from the floor using a lever, and then the rotation of the lower blade is stopped, and then the upper blade is used to crush the surface material, so that no force is applied to the support device during the process of crushing the surface material. Therefore, unlike conventional equipment, the support device does not lift up and fall at the same time as crushing, causing large vibrations and noise. Also, since the lower blade acts as a lever, it can be inserted under the surface material. It has excellent practical effects such as extremely easy operation.

In the above example, the engagement arm 11 of the upper blade body 5
The plate part 23 of the lower blade body 18 is inserted between the a and 11b, but the plate part 23 of the lower blade body is made bifurcated and the engagement arm of the upper blade body is inserted between them. You can also do it.

[Brief explanation of the drawing]

Figure 1 is a front view of the proposed device, and Figure 2 is its -
A cross-sectional view along the line, and FIG. 3 is a perspective view showing the upper blade body. DESCRIPTION OF SYMBOLS 1... Support frame, 5... Upper blade body, 8... Crushing part, 11a, 11b... Engagement arm, 13... Hydraulic cylinder, 18... Lower blade body, 25... Bent elongated hole for engagement.

Claims (1)

[Scope of utility model registration request] A lower blade body whose middle part is pivotally connected to the lower end part of a support frame connected to the tip of the boom of a work vehicle by a pivot pin, and has a cutting edge on the front end side and a pivot part on the rear end side, and the lower blade body an upper blade body that is pivotally connected to the support frame by a pivot pin different from the pivot pin and rotates opposite to the lower blade body; and a hydraulic cylinder that rotationally drives the upper blade body; A pin 24 bridged at the tip of an engagement arm extending from the pivot bearing part of the blade body has an engagement length consisting of an arcuate hole and a linear hole formed in the rear end side plate part of the lower blade body. 1. A road pavement crushing device, which is engaged and connected to a hole, and both blade bodies rotate opposite each other at the initial stage of crushing, and then the lower blade body stops and only the upper blade body rotates.