Working Machine Arm Greasing Tube Layout for Easier Assembly
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Solution Overview
Problem
The existing manufacturing process for arms of working machines with greasing portions is labor-intensive due to the need for precise alignment and welding of greasing tubes, increasing man-hour costs.
Innovation Solution
A tubular arm design with a bearing member featuring a curved greasing tube that is housed inside the arm body through a cutout on the side surface, allowing for easier alignment and fixation of the greasing tube, reducing the number of assembly steps and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the greasing tube is aligned and welded into the tube body through hole through the inside of the arm, then the greasing function is achieved, but the number of man-hour costs increases
Solution Approach 1:
The greasing tube is extracted from the complex internal alignment and welding process. By providing a through hole that extends from the outer peripheral surface to the inner peripheral surface of the arm, the greasing tube can be simply inserted through the hole and fixed, eliminating the need for precise internal alignment and welding operations while maintaining the greasing function.
Solution Approach 2:
The arm is segmented with a dedicated through hole portion that is structurally separated from the main arm body. This through hole acts as an independent pathway that simplifies the greasing tube installation process, allowing it to be inserted and fixed without affecting the overall structural integrity of the arm.
2Reliability
If the greasing tube is inserted and welded through the inside of the arm, then the greasing connection is established, but the manufacturing process complexity increases
Solution Approach 1:
The complex internal alignment and welding process is extracted and replaced with a simple insertion and fixing process through the through hole. The greasing tube is inserted through the through hole that extends from the outer to inner peripheral surface, and fixed in place, eliminating the need for complex internal welding operations.
3Ease of manufacture
If the tube body through hole is formed in the side plate of the arm, then the greasing tube can pass through, but the arm structure complexity increases
Solution Approach 1:
The arm structure is segmented with a dedicated through hole portion that is structurally separated from the main arm body. This through hole acts as an independent pathway that simplifies the greasing tube installation process while maintaining the overall structural integrity of the arm.
Solution Approach 2:
The through hole portion serves multiple functions: it provides a pathway for the greasing tube, maintains structural integrity of the arm, and simplifies the manufacturing process. This multi-functional design eliminates the need for separate complex structures while achieving the greasing tube installation objective.
Data Source
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AI summary
The present invention intends to simplify a manufacturing process of an arm (16) for a working machine (1) having a greasing portion (63) for greasing a bearing member (60) provided at the arm tip, the greasing portion (63) being provided on the side surface of the arm (16). The arm (16) for the working machine (1) includes: an arm body (30) having a tubular shape; and the bearing member (60) attached to a tip portion of the arm body (30) and pivotally supporting another member. The bearing member (60) includes: a boss having a cylindrical shape; and the greasing tube (63) having: one end portion (62a) attached to a greasing hole (61a) provided on an outer peripheral surface of the boss; the other end portion (62c) attached to a side surface of the arm body (30); and a tube body portion (62b) connecting the one end portion (62a) and the other end portion (62c). The tube body portion (62b) is curved orienting the one end portion (62a) in a radial direction of the boss and orienting the other end portion in a direction substantially parallel to an axial direction of the boss. The side surface of the arm body (30) is provided with a cutout portion to which the tube body portion (62) is inserted, the cutout portion opening toward the tip end portion. The one end portion (62a) of the greasing tube (63) and the tube body portion (62b) are housed inside the arm body (30). The other end portion (62c) of the greasing tube (63) is oriented to an outside of the arm (16) through the cutout portion and fixed to the side surface of the arm (16).