Console Box Hose Guide Surface for Hydraulic Durability
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Solution Overview
Problem
In small-sized working machines like hydraulic excavators, the upturn type of console box poses a challenge as it deflects hydraulic hoses, leading to potential contact with surrounding structures, which can cause deformation and reduce durability due to space constraints and equipment integration requirements.
Innovation Solution
The design incorporates a seat stand with a hose accommodation space and an oblique guide surface that allows the hydraulic hose to be rearward curved and laterally guided, reducing contact forces and preventing deformation, along with a clamp to stabilize the hose's curvature and facilitate smooth movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the console box is designed as an upturn type to open the entrance route, then the operator can easily get on and off the working machine, but the hydraulic hose experiences excessive force and deformation due to deflection during console box movement
Solution Approach 1:
A guide member is introduced as an intermediary component between the hydraulic hose and the surrounding structure. This guide member redirects the movement path of the hydraulic hose during console box upturn, preventing direct contact with the seat stand or other structures that would cause deformation and excessive force
Solution Approach 2:
The hydraulic hose is routed to extend in the width direction of the working machine rather than directly upward. This dimensional change in hose routing creates a more favorable movement trajectory that reduces bending stress and prevents contact with surrounding structures during console box movement
2Reliability
If movement-allowance space is secured around the hydraulic hose to accommodate console box movement, then the hydraulic hose can move without contact, but equipment integration becomes difficult and downsizing is hindered
Solution Approach 1:
The hydraulic hose is routed to extend in the width direction of the working machine rather than directly upward. This dimensional change in hose routing creates a more favorable movement trajectory that reduces bending stress and prevents contact with surrounding structures during console box movement
Solution Approach 2:
The curvature radius of the hydraulic hose is controlled within a specific range (100mm to 300mm) to optimize the balance between allowing sufficient movement and preventing excessive bending. This parameter optimization enables compact integration while maintaining hose durability
Data Source
AI summary
Provided is a working machine capable of preventing excessive force from being exerted on a hydraulic hose connected to a console box by movement of the console box. The working machine includes a machine body including an operation space on a floor surface, a seat stand in the operation space and including a side wall portion defining an accommodation space, an operator's seat, a console box capable of moving between a fall-down position and an upturn position, and a hydraulic hose including an over-floor region extending upward from the floor surface to be connected to a front part of the console box and accommodated in the accommodation space so as to have a curved portion. The side wall portion has an oblique guide surface which guides the curved portion to make the curved portion slide along the oblique guide surface by turning of the console box.