Electrical Plug Friction Brake for Stable Rotational Positioning
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Solution Overview
Problem
Existing electrical plugs for electric motors lack flexibility in positioning and accessibility, especially when mounted, and often require complex fastening systems that can be prone to unwanted rotational movement during motor operation.
Innovation Solution
An electrical plug with a friction brake device that includes a radially exposed friction brake part on its outer face, allowing for defined rotational movement only when a preset torque threshold is exceeded, providing stable retention and adjustable rotational positions without the need for a flange sleeve or complex fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flange sleeve with screw connection is used to fasten the electrical plug, then reliable retaining is achieved, but the positioning flexibility and accessibility are reduced
Solution Approach 1:
The friction brake device enables dynamic adjustment of the plug's rotational position after mounting. The plug can be rotated freely until a desired position is reached, then secured by tightening the friction brake adjustment mechanism. This combines the reliability of fixed retention with the flexibility of adjustable positioning, resolving the contradiction between stable fastening and positioning versatility.
2Stability of the object's composition
If multiple fastening components are provided to prevent rotational movement, then retention stability is improved, but the device complexity increases
Solution Approach 1:
The friction brake device combines multiple functions into a single integrated component: it provides friction-based rotational restraint, allows controlled rotation when needed, and enables adjustable positioning. This single device replaces what would traditionally require separate fastening components, reducing overall system complexity while maintaining retention stability.
Solution Approach 2:
The friction brake adjustment mechanism allows the friction force parameter to be varied. By adjusting the friction brake, the operator can change the torque threshold for rotational movement, enabling the same device to provide both stable retention (high friction) and controlled rotation (reduced friction) as needed.
3Adaptability or versatility
If a friction brake device with torque threshold is used, then rotational freedom is enabled, but unwanted rotational movement during operation may occur
Solution Approach 1:
The friction brake adjustment mechanism provides manual feedback control. The operator can observe the plug's position and adjust the friction brake accordingly to achieve the desired rotational freedom while preventing unwanted movement. This closed-loop adjustment process ensures that the torque threshold is set appropriately for each specific application, balancing rotational accessibility with operational stability.
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
Facilitates variable and secure mounting of the electrical plug on a motor housing with defined rotational freedom, preventing unwanted movement and allowing for easy adjustment, even under operational vibrations.
Implementation Method 1
By the friction brake device a friction braking acting in an azimuthally defined way around the longitudinal axis of the first plug housing section with a preset defined torque threshold value for the electrical plug is generated
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
One aspect of the invention relates to an electrical plug (1), especially for connecting to a housing part (26) of an electric motor, the electrical plug (1) comprising a plug housing (2), which comprises a first plug housing section (3) having a longitudinal axis (A), wherein the first plug housing section (3) intentionally is configured for insertion into a plug socket (27) of the housing part (26) and the electrical plug (1) comprises a friction brake device (15) comprising a friction brake part (16), wherein said friction brake part (16) is arranged on an outer face (10) of the first plug housing section (3) and said friction brake part (16) is exposed towards the outside in radial direction to the longitudinal axis (A), wherein by the friction brake device (15) a friction braking act-ing in an azimuthally defined way around the longitudinal axis (A) with a set torque threshold value for the electrical plug (1) is generated. Further aspects relate to an arrangement (29) and a method.