Working Machine Arm Greasing Tube Layout for Bearing Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing arm designs for working machines lack an efficient greasing mechanism that protects the bearing members from damage during operation, particularly from contact with rocks and earth, which can lead to premature wear and reduced machine performance.
Innovation Solution
A bearing member with a cylindrical boss and a greasing tube is integrated into the arm, where the tube body is curved to orient one end radially and the other end parallel to the boss's axis, allowing for easy insertion and fixation within the arm body, and a support member is used to secure the greasing tube, enhancing rigidity and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a greasing tube is installed to protect the bearing member from damage during operation, then the reliability of the bearing member is improved, but the device complexity increases
Solution Approach 1:
The greasing tube is integrated with the bearing member structure, where the tube body is formed as a single piece with the boss portion. This merging of components reduces the number of separate parts and simplifies the overall device while maintaining the protective function of the greasing mechanism.
Solution Approach 2:
The greasing tube serves multiple functions: it provides grease supply to the bearing member, protects the bearing from external damage, and its curved tube body portion acts as a structural connector. This multi-functionality reduces the need for additional protective components, thereby reducing device complexity while improving reliability.
2Ease of operation
If the tube body portion is curved to orient ends in specific directions, then the ease of operation for insertion and fixation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The tube body portion is designed with a curved configuration that naturally orients one end in the radial direction of the boss and the other end in a direction substantially parallel to the axial direction of the boss. This curvature facilitates easy insertion through the cutout portion and proper alignment during assembly, improving ease of operation while the curved shape itself becomes a defining manufacturing feature.
3Strength
If a support member is added to secure the greasing tube, then the rigidity of the bearing member is improved, but the device complexity increases
Solution Approach 1:
The support member is designed to be attached to the arm body in advance, creating a pre-prepared mounting structure. This preliminary action simplifies the final assembly process, as the greasing tube can be directly secured to the pre-attached support member without requiring complex alignment or additional fastening operations, thereby reducing overall assembly complexity while maintaining rigidity.
Data Source
AI summary
The arm for the working machine includes: an arm body; and the bearing member attached to the arm body. The bearing member includes: a boss; and the greasing tube having: one end portion attached to a greasing hole provided on the boss; the other end portion attached to the arm body; and a tube body portion connecting the one end portion and the other end portion. The side surface of the arm body is provided with a cutout portion to which the tube body portion is inserted, the cutout portion opening toward the tip end portion. The one end portion of the greasing tube and the tube body portion are housed inside the arm body. The other end portion of the greasing tube is oriented to an outside of the arm through the cutout portion and fixed to the side surface of the arm.