Thin-Walled Roller Bearing for Compact Precision Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing machining devices face challenges in achieving compact design while ensuring high precision and accuracy in material-removing machining processes, particularly in machining spaces where tools need to be both longitudinally displaceable and rotatable within the space.
Innovation Solution
A device utilizing a roller bearing with a thin-walled tubular inner part and a sleeve-like outer part, allowing simultaneous longitudinal movement and rotation, which enables precise tool movement with minimal play and compact dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a roller bearing is used to enable simultaneous longitudinal movement and rotation, then compact dimensions are achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges two separate bearing functions (longitudinal movement and rotation) into a single roller bearing component. The rolling elements are arranged in the cage such that they enable both axial displacement and rotational movement simultaneously, eliminating the need for separate bearing mechanisms and achieving compact radial dimensions while maintaining precision through the integrated design.
Solution Approach 2:
The cage serves as an intermediary component that guides and constrains the rolling elements to achieve the desired dual functionality. The cage structure ensures that the rolling elements move in a controlled manner, enabling both longitudinal and rotational movements while maintaining manufacturing precision through proper geometric constraints.
2Ease of operation
If the inner part is made thin-walled to reduce mass, then ease of operation is improved, but structural strength decreases
Solution Approach 1:
The patent changes the wall thickness parameter of the inner part to be thin-walled (less than 1.5 mm), which reduces the mass and inertia of the moving component, making it easier to accelerate and control during machining operations. The strength is compensated through the roller bearing support system that provides structural reinforcement at critical locations.
Solution Approach 2:
The inner part is made from a composite material or treated surface that provides high strength-to-weight ratio. The thin-walled structure is reinforced through material selection or surface treatment to maintain sufficient structural strength while minimizing mass for easier operation.
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
This solution allows for a compact and precise machining device, ensuring high accuracy and efficient material removal within a machining space, suitable for precise applications like machining plastic or ceramic parts for dental replacements.
Implementation Method 1
at least one roller bearing with an outer part and with an inner part, with rolling elements arranged between the outer and inner parts making the inner part rotatable relative to the outer part
Implementation Method 2
with rolling elements arranged between the outer and inner parts making the inner part rotatable relative to the outer part also longitudinally displaceable
Data Source
AI summary
The machine for material-removal working of a workpiece has a working chamber (2) to receive the workpiece and a tool. The chamber has a closable insertion opening. The chamber has a ball bearing sleeve extending through its wall. The sleeve has an outer tube (12) extending through the wall and supporting an inner tube (11) which has a workpiece holder on its inner end. There can be a cage (14) for the bearing balls between the inner and outer tubes.