Gear Motor Shaft Coupling With Clamping Ring for Backlash-Free Torque
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Solution Overview
Problem
Existing geared motors face challenges in manufacturing simplicity and cost-effectiveness due to complex connections between the rotor shaft and the gear, which hinder efficient assembly and torque transmission.
Innovation Solution
A geared motor design featuring a non-positive connection between the rotor shaft and the adapter shaft using a clamping ring and a spring element, such as an O-ring, along with a threaded pin for axial and circumferential securing, allowing for easy assembly and secure torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex connection structure is used between the rotor shaft and the gear, then the torque transmission reliability is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The connection structure is divided into separate functional components: a clamping ring for axial securing, a spring element for elastic retention, and a screw for circumferential positioning. This segmentation allows each component to perform its specific function independently, simplifying manufacturing while maintaining overall connection reliability for torque transmission.
Solution Approach 2:
The spring element is pre-installed in the annular groove of the adapter shaft before the clamping ring is assembled. This preliminary action ensures that when the clamping ring is secured axially, the spring element automatically engages to provide elastic retention, establishing reliable torque transmission capability from the outset without requiring complex post-assembly adjustments.
2Ease of manufacture
If a simple connection structure is used between the rotor shaft and the gear, then the manufacturing simplicity is improved, but the torque transmission reliability deteriorates
Solution Approach 1:
The spring element introduces an elastic parameter change to the connection system. By utilizing the elastic properties of the spring element, the connection transitions from a rigid simple structure to a compliant structure that can accommodate minor misalignments and maintain consistent contact pressure, thereby enhancing torque transmission reliability while keeping the overall structure simple and easy to manufacture.
Solution Approach 2:
The spring element acts as an intermediary between the clamping ring and the adapter shaft. It mediates the force transmission by providing elastic retention, ensuring that the clamping ring remains securely positioned axially while allowing for controlled movement that maintains reliable torque transmission without requiring complex direct coupling mechanisms.
3Ease of operation
If a clamping ring with spring element is used, then the axial securing is simplified, but the device complexity increases
Solution Approach 1:
The spring element provides self-service by automatically engaging with the clamping ring through elastic deformation. When the clamping ring is axially secured to the adapter shaft, the spring element naturally expands to contact both components, creating a self-retaining mechanism that secures the axial position without requiring additional fasteners or complex locking mechanisms, thus simplifying the axial securing operation.
Solution Approach 2:
The spring element is nested within the annular groove structure, fitting between the clamping ring and the adapter shaft. This nested arrangement allows the spring element to be compactly integrated into the existing geometry, providing the necessary elastic retention function without significantly increasing the overall device complexity or requiring additional space.
4Stability of the object's composition
If multiple securing elements are used, then the circumferential positioning is improved, but the manufacturing cost increases
Solution Approach 1:
The screw serves multiple functions: it secures the clamping ring circumferentially to prevent rotation, provides a mounting point for the spring element, and allows for easy assembly and disassembly. This multi-functionality reduces the need for separate dedicated components for each function, thereby maintaining circumferential positioning stability while controlling manufacturing costs through component consolidation.
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 design simplifies the manufacturing process, ensures axial and circumferential securing of the clamping ring, and provides a cost-effective, backlash-free torque transmission, enhancing the motor's efficiency and reliability.
Implementation Method 1
a spring element, in particular an O-ring, is arranged between the clamping ring and the adapter shaft, wherein the spring element contacts the clamping ring and contacts the adapter shaft
Implementation Method 2
the rotor shaft of the electric motor is connected by means of a clamping ring in a force-fit manner to an adapter shaft
Data Source
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AI summary
According to the invention, the rotor shaft of the electric motor is force-fittingly connected by means of a tensioner ring, particularly by shrink fitting, to an adapter shaft which is connected for conjoined rotation to a driving toothing section of the gear mechanism of the gear motor, wherein a spring element, particularly an O-ring, is arranged between the tensioner ring and the adapter shaft, in particular said spring element touches the tensioner ring and the adapter shaft.