Quick-Clamping Spindle With Rotational Pre-Locking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing quick-clamping spindles lack the capability for positional pre-blocking before achieving complete clamping, which is desirable in certain configurations and uses.
Innovation Solution
A quick-clamping spindle with a rotational pre-locking device that includes a male element with a radial housing and a spring-loaded lug, and a female element with angularly offset cavities on the control head, allowing the control rod to be pre-locked in the spindle body, enabling positional pre-blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional quick-clamping spindle assembly is used, then the structure is simple and cost-effective, but positional pre-blocking capability is lacking
Solution Approach 1:
The pre-locking device is segmented into distinct male and female elements with specific geometric features (lug and cavities). The male element includes a radial housing with a spring-loaded lug, while the female element has angularly offset cavities. This segmentation allows independent design and optimization of each component's function.
Solution Approach 2:
The spring-loaded lug is pre-positioned within the radial housing, and the cavities are pre-configured at specific angular offsets. When the control rod rotates, the lug automatically engages with the first cavity at a predetermined angular position, achieving pre-blocking before complete clamping without requiring additional control actions.
2Reliability
If a pre-locking device with spring-loaded lug and angularly offset cavities is added, then positional pre-blocking is enabled, but device complexity increases
Solution Approach 1:
The spring-loaded lug automatically engages with the angularly offset cavities through the natural rotation of the control rod. The spring force ensures continuous contact and automatic engagement without requiring external actuators, complex control systems, or precise manual adjustment, thereby simplifying manufacturing while ensuring reliable pre-locking.
3Volume of moving object
If the lug is formed by a ball, then the pre-locking mechanism becomes more compact, but the engagement precision may be reduced
Solution Approach 1:
The cavities are designed with asymmetric V-shapes that guide the spherical lug into precise engagement positions. The V-shaped geometry provides lateral guidance and positioning, ensuring that the ball engages accurately at the predetermined angular offset despite the spherical shape's inherent rotational freedom. This asymmetric design compensates for the reduced precision of spherical engagement.
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
Enables precise positional pre-blocking and holding of pieces to be machined, while maintaining a competitive cost structure.
Implementation Method 1
a spring being located in the radial housing and having an end which rests in the bottom of this housing and another end which bears on the lug
Data Source
AI summary
Quick-clamping spindle contains two pieces, firstly a spindle body supplied with a clamping member at one of the ends thereof and secondly a control rod for controlling the use/withdrawal of said clamping member, which rod is contained in said spindle body as well as a member for maneuvering and controlling the clamping member placed at the other of the ends of said spindle body, which simultaneous control member has a helical ramp provided in the wall of said spindle body engaging a transverse shaft borne by said control rod. The spindle further has a device for rotationally blocking the control rod in the spindle body. It is intended for use in the machining field.