The excavator stone grab is an important working device of the excavator. The following is a detailed introduction to it:
1. Definition and function
Definition: The excavator stone grab is one of the excavator working device accessories designed, developed and manufactured specifically for the working needs of excavators to transport and sort products such as stone bricks.
Function: The claws are driven to open and close by hydraulic energy or electric energy, so as to achieve accurate grasping and placement of solid objects such as stones and concrete.
Structure and working principle
Structure: The excavator stone grab is mainly composed of claws, cylinders, slewing motors, slewing bearings and other components. The claws are usually made of high-hardness wear-resistant steel to ensure service life and grasping force; the cylinders are extended and retracted to realize the grasping and releasing of the claws; the slewing motors and slewing bearings realize the rotation function of the claws.
Working principle: Taking the hydraulic stone grab as an example, its working principle is to use the hydraulic pump of the excavator as the power source, transmit power to the hydraulic motor, convert hydraulic energy into mechanical energy, and drive the pinion installed on the output shaft of the hydraulic motor to rotate. The pinion meshes with the inner ring of the slewing bearing, driving the inner ring of the slewing bearing to rotate, and then driving the claw component to rotate with the inner ring of the slewing bearing. When the angle required to grab the material is reached, the excavator stops supplying oil to the hydraulic motor, and the hydraulic motor stops working. At the same time, the brake inside the motor body or superimposed on it works, so that the claw is accurately positioned in the material pile. At this time, the excavator is operated to supply oil to the small cavity of the hydraulic cylinder, the cylinder retracts, and the claw opens to grab the material; the control valve is operated to supply oil to the large cavity of the hydraulic cylinder, the hydraulic cylinder extends outward, the claw closes, grabs the material and holds it tightly.
Audited Supplier 
){kind=link}