Rock Breaking Device and Construction Machinery

Abstract

A rock breaking device, including: a large arm, including a first large arm end, a second large arm end and a first hinge part; a small arm, including a first small arm end, a second small arm end and a second hinge part; a scarifier, including a third hinge part and being divided into a first scarifying part that is close to a tip of the scarifier and a second scarifying part that is connected to the first scarifying part; a first hydraulic cylinder; and a second hydraulic cylinder; a first large arm end is configured to connect to a carrier, while a second large arm end is hinged with the second hinge part; an end of the first hydraulic cylinder is hinged with the first hinge part, and another end of the first hydraulic cylinder is hinged with a first small arm end, while a second small arm end is hinged with the third hinge part; an end of the second hydraulic cylinder is hinged with the small arm, and another end of the second hydraulic cylinder is hinged with the second scarifying part, the weight of the scarifier accounting for 30%-70% of the total weight of the rock breaking device. Further provided is a construction machinery including the rock breaking device.

What is claimed is: 
     
         1 . A rock breaking device, comprising:
 a large arm, comprising a first large arm end, a second large arm end and a first hinge part located at the middle of the large arm;   a small arm, comprising a first small arm end, a second small arm end and a second hinge part located at the middle of the small arm;   a scarifier, comprising a third hinge part and being divided into a first scarifying part that is close to a tip of the scarifier and a second scarifying part that is connected to the first scarifying part by a line that passes through the third hinge part and perpendicular to a connection line of the third hinge part and the tip of the scarifier;   a first hydraulic cylinder;   a second hydraulic cylinder,   wherein the first large arm end is configured to connect to a carrier, the second large arm end is hinged with the second hinge part, an end of the first hydraulic cylinder is hinged with the first hinge part, and another end of the first hydraulic cylinder is hinged with the first small arm end, the second small end is hinged with the third hinge part, an end of the second hydraulic cylinder is hinged with the small arm, and another end of the second hydraulic cylinder is hinged with the second scarifying part,   a weight of the scarifier accounts for 30%-70% of a total weight of the rock breaking device.   
     
     
         2 . The rock breaking device according to  claim 1 , wherein a volume of the scarifier is greater than a volume of the small arm, the weight of the scarifier is greater than a weight of the small arm, and the weight of the scarifier is greater than a weight of the large arm. 
     
     
         3 . The rock breaking device according to  claim 1 , wherein a volume of the second scarifying part is greater than 3 times a volume of the first scarifying part. 
     
     
         4 . The rock breaking device according to  claim 3 , wherein the volume of the second scarifying part is greater than 5 times the volume of the first scarifying part. 
     
     
         5 . The rock breaking device according to  claim 1 , wherein a weight of the second scarifying part is greater than 3 times a weight of the first scarifying part. 
     
     
         6 . The rock breaking device according to  claim 5 , wherein the weight of the second scarifying part is greater than 5 times the weight of the first scarifying part. 
     
     
         7 . The rock breaking device according to  claim 1 , wherein the weight of the scarifier accounts for 40%-70% of the total weight of the rock breaking device. 
     
     
         8 . The rock breaking device according to  claim 1 , wherein the second scarifying part is provided with at least two first hinge positions respectively for being hinged with the second hydraulic cylinder,
 in the at least two first hinge positions, different ones of the at least two first hinge positions have different distances from the third hinge part.   
     
     
         9 . The rock breaking device according to  claim 1 , wherein the first small arm end is provided with at least two second hinge positions respectively for being hinged with the first hydraulic cylinder,
 in the at least two second hinge positions, different ones of the at least two hinge positions have different distances from the second hinge part.   
     
     
         10 . (canceled) 
     
     
         11 . The rock breaking device according to  claim 1 , wherein the second scarifying part further comprises:
 a counterweight, being detachably mounted on the second scarifying part to adjust a weight of the second scarifying part.   
     
     
         12 . The rock breaking device according to  claim 1 , wherein the scarifier comprises a cavity. 
     
     
         13 . The rock breaking device according to  claim 12 , wherein the cavity is filled with a filler. 
     
     
         14 . The rock breaking device according to  claim 1 , wherein the second scarifying part is provided with a vibration excitation device. 
     
     
         15 . (canceled) 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . The rock breaking device according to  claim 1 , wherein an included angle between an axis of the second hydraulic cylinder and a connection line between the third hinge part and a connection point of the end of the second hydraulic cylinder and the first small arm end is in a range from 45 degrees to 130 degrees. 
     
     
         19 . The rock breaking device according to  claim 1 , wherein an included angle between an axis of the second hydraulic cylinder and a connection line between the third hinge part and a connection point of the end of the second hydraulic cylinder and the first small arm end is in a range from 70 degrees to 110 degrees. 
     
     
         20 . (canceled) 
     
     
         21 . The rock breaking device according to  claim 1 , wherein the weight of the scarifier is between 1.2 and 2.7 times a weight of the small arm. 
     
     
         22 . (canceled) 
     
     
         23 . (canceled) 
     
     
         24 . (canceled) 
     
     
         25 . The rock breaking device according to  claim 1 , wherein a hinge position of the second hydraulic cylinder and the small arm is a third hinge position, and on a plane perpendicular to the rotation axis of the third hinge position, a distance from the third hinge position to the second hinge part is 0.7 to 1.3 times a distance from the second hinge part to the third hinge part. 
     
     
         26 . The rock breaking device according to  claim 1 , wherein a hinge position of the first hydraulic cylinder and the small arm is a second hinge position, and a distance from the second hinge position to the second hinge part is 0.9 to 1.4 times a distance from the second hinge part to the third hinge part. 
     
     
         27 . A construction machinery, comprising the rock breaking device according to  claim 1 . 
     
     
         28 . The construction machinery according to  claim 27 , further comprising:
 a carrier, comprising a vehicle body and a walking device carrying the vehicle body, the walking device being configured to drive the vehicle body to move; and   a third hydraulic cylinder,   wherein the first large arm end is hinged with the vehicle body, an end of the third hydraulic cylinder is hinged with the vehicle body, and another end is hinged with the large arm.   
     
     
         29 . (canceled)