Hose Clip Screw Shear Plane for Predefined Torque Limiting
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Solution Overview
Problem
Existing hose clips with clamping screws require additional torque securing caps, which are complex and costly, and can cause damage due to excessive tightening forces.
Innovation Solution
A clip with a clamping apparatus featuring a clamping screw that includes a shear plane between the clamping head and assembly head, allowing the assembly head to shear off at a predefined torque, eliminating the need for additional torque securing caps and simplifying the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional torque securing cap is used to ensure predefined torque, then torque control reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the torque limiting function and the clamping head function into a single integrated clamping head structure. The breaking section is formed as an integral part of the clamping head, eliminating the need for separate torque securing caps while maintaining predefined torque control reliability.
Solution Approach 2:
The clamping head is designed to serve multiple functions: it provides clamping force through the clamping surface, limits torque through the breaking section design, and integrates the torque limiting feature directly into the head structure. This multi-functionality eliminates additional components.
2Reliability
If an additional torque securing cap is used to ensure predefined torque, then torque control reliability is improved, but manufacturing cost increases
Solution Approach 1:
The torque limiting function and clamping head function are merged into a single integrated structure, reducing the total number of parts that need to be manufactured, inventoried, and assembled. This integration directly reduces manufacturing costs while maintaining torque control reliability.
Solution Approach 2:
The clamping head is designed to serve multiple functions including torque limitation and clamping, eliminating the need for separate torque securing caps and reducing overall manufacturing complexity and cost.
3Reliability
If excessive pretensioning force is applied during tightening, then sealing effectiveness is improved, but damage to hose and clamping apparatus occurs
Solution Approach 1:
The breaking section is pre-designed with specific geometric parameters that determine the torque limit before actual use. This preliminary design ensures that the torque is automatically limited to a safe value during tightening, preventing excessive force application and potential damage while achieving adequate sealing.
Solution Approach 2:
The breaking section is designed to fail in a controlled manner at a predetermined torque level. This controlled failure converts the potentially harmful effect of excessive tightening force into a beneficial torque-limiting mechanism that protects the hose and clamping apparatus from damage.
4Manufacturing precision
If a calibrated, electric or pneumatic screwdriver is used for tightening, then torque precision is improved, but operational complexity and maintenance requirements increase
Solution Approach 1:
The clamping head with its breaking section design performs torque limitation automatically based on its geometric parameters, without requiring external torque control devices. The structure itself provides the torque precision function, eliminating the need for calibrated, electric, or pneumatic screwdrivers.
Solution Approach 2:
The torque precision is achieved by changing the geometric parameters of the breaking section (such as cross-sectional area, moment of inertia) rather than relying on complex torque control devices. This parameter-based approach simplifies the overall system while maintaining precise torque control.
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
The solution ensures a predefined torque without additional components, preventing damage to the hose and clamping apparatus, simplifies tightening, and reduces production complexity and costs.
Implementation Method 1
the assembly head shears off from the clamping head of the clamping screw at the shear plane if a predefined torque is applied or exceeded at the shear plane
Data Source
AI summary
The disclosure relates to a clip having a clip band which has two mutually adjacent ends which can be connected to each other by a clamping apparatus. A clamping screw is provided having a head portion and a shaft portion. The shaft portion has a shaft and a thread region, with which the clamping screw can be screwed to the clamping apparatus. The head portion has a clamping head for applying a pretensioning force in a pretensioning direction. The head portion has an assembly head for tightening the clamping screw and for ensuring a predefined torque. There is provision for the clamping head to have a shear plane at the upper side thereof.