Rotary Ejector Clamping System for Symmetric Parts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 4-point clamping system is complex and costly to produce due to additional milling required for eccentric driving grooves and a two-part ejector construction, which increases manufacturing complexity and assembly time.
Innovation Solution
A clamping system with a rotary ejector body anchored directly in a central through-hole of the base body, allowing for simplified production and assembly, and incorporating a coolant/lubricant supply for MQL technology, reducing the need for complex machining and assembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-part ejector construction with tubular element and ring element is used, then the ejection function is achieved, but the manufacturing complexity and assembly time increase
Solution Approach 1:
The patent combines the tubular element and ring element into a single integrated ejector body. The rotary body incorporates both the cylindrical outer peripheral surface (replacing the tubular element) and the circumferential wedge flanks (replacing the ring element's ejection function) into one monolithic component, eliminating the need for separate parts and their assembly.
Solution Approach 2:
The rotary ejector body serves multiple functions simultaneously: it provides the cylindrical guiding surface for axial movement, contains the circumferential wedge flanks for ejection action, and incorporates the axial extension with groove for form-fitting anchoring. This multi-functional design replaces the specialized division of labor between separate tubular and ring elements.
2Reliability
If eccentric driving grooves are milled in the base body, then the ejector can be anchored, but the manufacturing complexity and costs increase
Solution Approach 1:
The patent introduces asymmetry by adding a circumferential groove in the axial extension of the rotary ejector body, which engages with a radially projecting anchor projection on the base body. This asymmetric feature enables form-fitting anchoring that prevents rotation while allowing axial movement, replacing the need for complex eccentric driving grooves.
Solution Approach 2:
The anchor projection acts as an intermediary element between the base body and the rotary ejector body. This simple protruding feature mediates the anchoring function, enabling reliable connection through a straightforward machining operation rather than complex eccentric groove milling.
3Reliability
If additional milling operations are performed on the base body, then the ejector anchoring is achieved, but the production time and costs increase
Solution Approach 1:
The asymmetric circumferential groove in the axial extension engages with a simple radially projecting anchor projection, creating a reliable anchoring mechanism that requires minimal machining operations compared to eccentric driving grooves, thereby improving production efficiency.
Solution Approach 2:
The anchoring function is segmented into a simple anchor projection on the base body and a corresponding circumferential groove on the rotary ejector body. This segmentation allows each feature to be machined independently and simply, reducing overall production time and costs while maintaining reliable anchoring.
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
Simplifies production and assembly processes, reduces manufacturing costs, and ensures reliable operation with a secure ejection mechanism that prevents unintentional unlocking, while maintaining precise fit and alignment of connected parts.
Implementation Method 1
the two clamping bodies 12 in the clamping position act on the one part 1 with a pressing force 8 acting in a pressing direction 9 toward the other part 3
Implementation Method 2
the two clamping bodies 12 in the release position act on the ejector 130 with an ejection force 10 acting away from the other part 3 in an ejection direction 11
Implementation Method 3
When operated in the direction of the release position, the two clamping bodies 12 run onto two wedge flanks 17 provided on the ring element, as a result of which the ring element 15 experiences an axially directed ejection force
Data Source
Figure 1
Figure 2~4
Figure 5~7
AI summary
The invention relates to a clamping system for detachably connecting two preferably rotationally symmetrical parts (1, 3), of which one part (1) has a preferably cylindrical or conical hollow shaft (2) and the other part (3) has a receiving portion (4) for receiving the hollow shaft (2) with a precise fit, comprising: a main body (110) which is to be arranged concentrically in the receiving portion (4) of the other part (3), extends into the hollow shaft (2) of the one part (1) when the two parts (1, 3) are joined to one another, and bears two clamping bodies (120, 120), which can be operated in a diametrically opposed manner between a release position and a clamping position, and comprising an ejector (130) which is held so as to be axially adjustable by a defined ejection stroke in a centric through-bore (114) in the main body (110), wherein the two clamping bodies (120, 120) subject the one part (1) to a pressing force acting in a pressing direction towards the other part (3) in the clamping position, and in the release position subject the one part (1) to an ejection force acting in an ejection direction away from the other part (3) by way of the ejector (130), characterized in that the ejector (130) is formed from a body of revolution, which is detachably anchored directly in a centric through-bore (114) formed in the main body (110) with axial play which corresponds to the defined ejection stroke.