Axial Locking Conical Contact Hydraulic Selection System
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Solution Overview
Problem
Existing hydraulic device selection and braking systems face issues with axial stop mechanisms that are not stressed along their axis of greatest resistance, leading to functional clearance and potential breakage due to dimensional requirements and segmented assembly, which results in bending and punctual force application.
Innovation Solution
A selection system featuring a sleeve with a conical base and shell portions that form a conical contact, allowing for flat plane contact and distributing forces axially and radially to prevent misalignment and concentration of stress, using a spring washer for orientation and movement adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If stop pieces are segmented into several pieces to allow assembly around a shaft, then ease of manufacture and assembly is improved, but functional clearance increases causing bending and punctual force application leading to breakage
Solution Approach 1:
The shell is divided into two separable portions (first shell portion and second shell portion) that can be assembled around the connecting rod independently, then joined together to form the complete stop mechanism
Solution Approach 2:
The first and second shell portions are joined together to form a unified shell structure that provides continuous support around the connecting rod, eliminating gaps and ensuring uniform force distribution
2Volume of moving object
If dimensional requirements are reduced to achieve high force recovery in reduced space, then compactness is improved, but the stop pieces cannot be properly assembled around the shaft
Solution Approach 1:
The segmented shell portions are designed to be assembled around the connecting rod in a nested manner, where each portion fits over the rod sequentially and then joins with the other portion to form the complete structure
3Ease of operation
If stop pieces are designed with significant functional clearance to allow assembly, then ease of assembly is improved, but bending occurs and forces are applied punctually causing breakage
Solution Approach 1:
The stop mechanism incorporates a spring element that provides dynamic adjustment and compensation, allowing the rigid shell portions to maintain precise alignment and force distribution while accommodating assembly variations and operational movements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively supports high forces in a reduced space, reduces the risk of breakage by distributing forces through flat surfaces, and maintains alignment and concentricity, enhancing the stability and reliability of hydraulic machine components.
Implementation Method 1
a base having symmetry of revolution and comprising a conical portion, a shell comprising two shell portions each comprising a conical portion configured to bear flat against the conical portion of the base
Implementation Method 2
The system can then further comprise an orientation washer. The shell is then in abutment against the slewing ring which is itself in abutment against the second shoulder formed on the connecting rod. This orientation washer is typically formed by a spring washer.
Data Source
Figure 1~10
Figure 3~6
Figure 7~9
AI summary
Selection system (1), comprising - a sleeve (4) defining an internal housing extending along a longitudinal direction, - a connecting rod (3) disposed in said internal housing, and extending along the longitudinal direction, - a selection drawer (2) mounted to slide in the internal housing, around the connecting rod (3), the connecting rod (3) being mounted fixed in translation along the longitudinal direction relative to the sleeve (4) via stop means (6, 7), characterized in that the stop means (6, 7) comprise - a base (6) having a symmetry of revolution and comprising a conical portion (61), - a shell (7) having a symmetry of revolution and comprising a conical portion (7D3) configured to bear planarly against the conical portion (61) of the base (6).