A micro excavator arm structure and excavator

By setting a bent arc transition connecting plate structure on the boom, the cross-sectional height of the boom is increased, which solves the problem of insufficient strength in the boom structure of micro excavators and improves the stability and reliability of the structure.

CN224395642UActive Publication Date: 2026-06-23QINGDAO LOVOL EXCAVATOR +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
QINGDAO LOVOL EXCAVATOR
Filing Date
2025-07-03
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The existing micro excavator bucket rod structure has stress concentration at the central bearing, resulting in insufficient structural strength. Increasing the plate thickness or cross-sectional height will lead to design redundancy and assembly interference problems.

Method used

A transition connecting plate structure with a bent arc is set on the bottom plate of the boom near the central shaft seat to increase the height of the boom section, improve the bending and shear resistance, and optimize the boom structure.

Benefits of technology

This improves the stability and reliability of the boom structure, avoids design redundancy and assembly interference caused by increasing plate thickness or cross-sectional height, and enhances structural strength.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to heavy engineering machinery technical field, concretely relates to a little excavator bucket lever structure and excavator, adopt by the cover, first side board, second side board, bottom plate and rear bent board constitute the closed structure, the bottom plate includes with first bottom plate of cover connection, with second bottom plate of rear bent board connection, and be used for connecting first bottom plate and the transition connecting plate of second bottom plate, transition connecting plate and the middle axle seat position match, the middle axle seat sets up between bottom plate and cover and is close to bottom plate and cover junction, transition connecting plate presents bending circular arc convex structure.
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