Dog Brake Hydraulic Machine With Same-Side Piston and Bearings
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Solution Overview
Problem
Existing hydraulic machines face challenges in achieving compactness due to the brake piston and bearings being housed on opposite sides of the cylinder block, leading to bulk issues.
Innovation Solution
A hydraulic machine design where the brake piston and bearings are positioned on the same side of the cylinder block, with the piston's perimeter oriented radially opposite to the axis, and a bearing support member comprising two parts that form a housing for the piston, allowing for efficient space utilization and simplified manufacturing through non-machining methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the brake piston and bearings are positioned on opposite sides of the cylinder block, then the machine structure is conventional and easy to manufacture, but the machine volume increases and compactness is reduced
Solution Approach 1:
The patent merges the brake piston and bearings into the same radial side of the cylinder block, consolidating components that were traditionally separated. This merging allows the brake piston to be housed within the bearing support member structure, reducing the overall machine volume while integrating functions into a more compact arrangement.
Solution Approach 2:
The patent repositions the brake piston from an axial arrangement (opposite side) to a radial arrangement (same side), utilizing the radial dimension more efficiently. By orienting the piston's perimeter radially opposite to the axis and housing it within the bearing support member, the design achieves compactness through dimensional optimization.
2Volume of moving object
If the brake piston is housed on the same side as the bearings, then compactness is improved, but the housing space for the brake piston becomes constrained
Solution Approach 1:
The patent implements a nested arrangement where the brake piston is housed within the bearing support member structure. The bearing support member serves as an outer housing that contains the brake piston, effectively nesting one component within another. This nesting strategy maximizes space utilization by allowing the brake piston to occupy the radial space already allocated for bearing support.
3Reliability
If the perimeter of the piston is conformed to block rotation, then the piston is prevented from rotating relative to the bearing support member, but manufacturing complexity increases
Solution Approach 1:
The patent employs asymmetric conforming of the piston perimeter to prevent rotation. By shaping the piston's outer perimeter with specific asymmetric features that mate with corresponding features in the bearing support member, the design creates a non-rotatable connection. This asymmetric geometry provides inherent anti-rotation capability while being manufacturable through standard forming or machining operations.
Data Source
AI summary
Disclosed is a hydraulic machine (2) comprising:—a bearing support member (8),—a cylinder block (16),—a brake piston (20) that is movably mounted with respect to the bearing support member between a braking position in which the piston is shape-matchingly engaged with the cylinder block in such a way as to prevent the cylinder block from rotating with respect to the piston and a brake-release position in which the piston lets the cylinder block rotate freely with respect to the piston, and—at least one bearing (14) supported by the bearing support member (8), the piston and the bearing being on the same side of the cylinder block with reference to the direction of a main axis (X-X) of the machine, a perimeter (59) of the piston (20), oriented in the opposite direction to the axis, being configured so as to prevent the piston from rotating with respect to the bearing support member.