JPH0329366Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a crusher for crushing the pavement surface of a paved road hardened with asphalt or concrete.

[Prior Art] Conventionally, the lower crushing arm of this type of crusher must be of a fixed type. The reason for this is that when crushing the paved surface of a road, it is convenient to insert the arm under the painted roadbed to peel off the roadbed, and it is essential that the crushed material be placed on the fixed ripper part. This was thought to be because if the arm was lifted upwards, the crushed materials would escape. The fixed arm portion and the upper rotating movable crushing arm perform crushing by the movement of a hydraulic cylinder.

Crushing a paved road is a continuous process of peeling off the roadbed, dividing it into large parts, and then into small parts. In order to crush paved surfaces, thick crushed materials cannot be crushed unless they are peeled off. This prevents the crushed material from opening in the lateral direction due to cracking, and it is necessary to peel it off since there is no gap to escape.

In order to perform peeling, the cut must be made completely in the paved subgrade beforehand. However, since the thickness of the roadbed cannot be determined until it is destroyed, it cannot be determined from the surface and peeling is difficult. Furthermore, even if the incision is perfect, if the crushed material is thick and has a large area, a large force is required to peel it off, which may require straining the base machine or requiring a large base machine.

[Problems to be Solved by the Invention] An object of the present invention is to provide a crusher that can smoothly crush paved roadbeds.

[Means for Solving the Problems] The means of the present invention is such that an upper crushing arm and a lower crushing arm are pivotally mounted to the front face of a crusher main body so as to be movable up and down, and two hydraulic cylinders pivotally supported on the main body are connected to each other. Each rod is connected to an upper crushing arm and a lower crushing arm, and an elongated fixing arm that surrounds the lower crushing arm protrudes from the main body around the lower crushing arm.

[Example] In the figure, 1 is a crusher main body, 2 and 3 are an upper crushing arm and a lower crushing arm rotatably pivoted to the front surface of the main body 1 by shafts 4 and 5, and hydraulic cylinders 6 and 7, respectively. The rods 8 and 9 are opened as shown by the dashed lines in the figure, and the road bed is crushed under pressure. Reference numeral 10 denotes a fixed arm which is integrally extended from the main body 1 around the lower crushing arm 3 and protrudes longer than the lower crushing arm 3.

[Operation of the device] When the upper crushing arm 2 and the lower crushing arm 3 mutually operate toward the crushed object, even if the crushed object is being restrained from opening sideways to the crusher, the movement of the upper and lower arms will cause the crushed object to move forward. You can bite it. Further, since a fixed arm is attached to surround the lower crushing arm, it can be easily inserted under the roadbed, and the impact of the lower crushing arm and its impact are not directly transmitted to the hydraulic cylinders 6 and 7.

During operation, the lower crushing arm of the upper and lower crushing arms receives resistance from the roadbed, but at this time, the oil flows faster to the hydraulic cylinder of the upper crushing arm, which has less resistance than the hydraulic cylinder of the lower crushing arm, which receives resistance, so the upper crushing occurs. The arm operates faster than the lower crushing arm to prevent debris from escaping. The upper and lower crushing arms simultaneously concentrate their forces on one point, ensuring reliable crushing.

[Effects of the invention] According to the invention, the roadbed can be crushed well. In addition, since the fixed arm acts as a supporting stand when peeling off the roadbed, the rotation of the crushing arm is stable and the crushing action is powerful.

[Brief explanation of drawings]

The drawing is a perspective view showing an embodiment of a paved road crusher according to the present invention. 1...Main body, 2...Upper crushing arm, 3...Lower crushing arm, 6, 7...Hydraulic cylinder, 10
...Fixed arm.

Claims (1)

[Scope of utility model registration request] An upper crushing arm and a lower crushing arm are pivotally mounted to the front face of a crusher main body so as to be movable up and down, and each rod of two hydraulic cylinders pivotally supported on the main body is connected to the upper crushing arm and the lower crushing arm. , a paved road crusher in which a long and narrow fixed arm that surrounds the lower crushing arm protrudes from the main body.