Small excavator with double support arms

Abstract

The invention discloses a small excavator with double support arms, which comprises a bucket rod, two hinged seats, two support arm oil cylinders and a bucket, wherein the bucket rod is arranged between a moving arm and the bucket, and comprises a first bucket rod and a second bucket rod which are hinged with each other from the head to the tail, the front part of the second bucket rod is divided into two support arms which are equal in length, the front ends of the two support arms are pin-jointed with the bucket, the two hinged seats are respectively arranged on pin-jointed positions of the front ends of the two support arms and the bucket, the two support arm oil cylinders are respectively arranged on the outer sides of the two support arms, the bucket comprises a bucket main body, a bucket seat and a bucket tooth, the bucket seat is pin-jointed with the front ends of the two support arms, the bucket tooth is of an isosceles triangle, and sawteeth are uniformly distributed on the two equal sides of the isosceles triangle. The small excavator with the double support arms is reasonable in design, improves excavating strength, stabilizes excavating operation performance, can not cause mechanical injury to the bucket rod during the excavating operation, and prolongs service life.

Description

technical field [0001] The invention belongs to the technical field of excavators, in particular to a small excavator with double arms. Background technique [0002] Excavator buckets are driven by the bucket rod for excavation operations. The bucket rod is a steel structure connecting rod provided with a driving cylinder, which is pivotally connected to the bucket seat of the bucket and connected to one end of the cylinder through the drive frame. It is used to drive the bucket to rotate and excavate with one end of the stick as the center. During this process, due to the impact of various powerful forces on the bucket teeth, bucket seat and stick during the construction of the excavator, the pressure of the bucket excavation is concentrated on the At the pivot joint between the bucket and the arm, the pin shaft pivotally connected between the bucket and the arm becomes the transmission center of the powerful force. When it acts instantaneously, the pin shaft is the main ca...

AI Technical Summary

Problems solved by technology

However, this structure has the following disadvantages, that is, when the stick is under force, the stick will be bent and deformed at the hinge point of the middle support, and the backing plate and anti-collision strip here will also be bent and deformed, and the backing plate must be bent The deformation must first overcome the rigid bending of the anti-collision strip, so when the rigidity of the anti-collision strip increases, the backing plate should also increase its rigidity accordingly; the increase in the rigidity of the backing plate will inevitably lead to an increase in the thickness of the backing plate, so as to prevent the backing Cracking of plates and their corresponding welds

Therefore, the disadvantages of this anti-collision device are: the rigidity of the backing plate is high, and the cost of the plate thickness is high; if the design value is improper, it will cause tearing of the backing plate and cracking of the surrounding welds

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