Shaft-Hub Clamping Ring for Uniform Gear Motor Torque Transfer
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Solution Overview
Problem
Existing shaft-hub connections in geared motors lack uniform clamping, leading to potential play and instability in the motor-transmission connection.
Innovation Solution
A shaft-hub connection design where a motor shaft is inserted into an adapter's hollow section and clamped using a clamping ring with radially directed threaded bores, allowing a clamping screw to press against the adapter shaft at three circumferential positions, with recesses on the clamping ring for even contact and an optional sleeve for diameter adjustment, and a threaded pin for anti-twist prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single clamping screw is used to clamp the shaft to the hub, then the device complexity is reduced, but the clamping uniformity deteriorates
Solution Approach 1:
The clamping ring incorporates three locally positioned contact surfaces distributed around its circumference, each providing concentrated clamping force at specific locations. This local quality approach ensures uniform distribution of clamping force around the shaft-hub connection, preventing uneven stress and maintaining connection stability while using a simple single-screw mechanism.
Solution Approach 2:
The clamping ring is designed with segmented contact surfaces rather than a continuous contact surface. The three discrete contact surfaces are positioned at specific angular intervals around the ring, segmenting the clamping action into distinct force application points. This segmentation allows the single clamping screw to effectively distribute force uniformly around the connection interface.
2Manufacturing precision
If multiple clamping points are used to achieve uniform clamping, then the clamping uniformity is improved, but the device complexity increases
Solution Approach 1:
The clamping ring serves as an intermediary element between the single clamping screw and the shaft-hub interface. It translates the single-point clamping force from the screw into three distributed contact forces at specific locations around the connection. This intermediary mechanism achieves uniform multi-point clamping without requiring multiple independent clamping devices.
Solution Approach 2:
The clamping ring's geometry is specifically designed with three contact surfaces positioned at optimized angular intervals. By changing the geometric parameters of the clamping ring (number, position, and shape of contact surfaces), the system achieves uniform force distribution while maintaining a simple single-screw actuation mechanism.
3Adaptability or versatility
If the shaft is made adjustable in diameter to fit different adapters, then the adaptability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The shaft incorporates a movable adjustment mechanism that allows the diameter of the shaft portion engaging with the adapter to be dynamically changed. This dynamic adjustability enables the same shaft to fit different adapter inner diameters by shifting the shaft material radially, eliminating the need for multiple precision-matched shaft-adapter pairs.
Solution Approach 2:
The shaft's effective diameter is made variable through an adjustment mechanism that changes the radial position of the shaft material. By altering this geometric parameter, the shaft can accommodate different adapter inner diameters while maintaining precise engagement, reducing the need for high manufacturing precision across multiple shaft variants.
Data Source
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AI summary
The invention relates to a shaft-hub connection, a shaft (1) being received in a receiving opening (62) of a hub and a clamping ring (11) being arranged on the hub. The clamping ring has a threaded bore, in particular a threaded bore that is radially oriented and a locking screw (10) is screwed into said bore. The locking screw presses against the shaft.