Threshold Torque Transmission Device with Friction Discs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mechanical threshold force transmission devices are complex to manufacture and exhibit latency in response due to the need for reversible helical connections and clearance uptake before releasing the second element, leading to inefficiencies in torque transmission.
Innovation Solution
A mechanical threshold force transmission device with a support member made in one piece, featuring integral friction discs and rotation drive means between the support member and the second element, allowing direct axial displacement and immediate release when the torque threshold is reached, eliminating the need for clearance uptake and simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reversible helical connections are used between the rod and nuts, then torque transmission is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent removes the complex reversible helical connection mechanism (rod with threads and nuts) and replaces it with a simpler friction-based connection. The friction discs and support member directly transmit torque without requiring threaded connections, extracting the essential function while eliminating manufacturing complexity.
Solution Approach 2:
The patent substitutes the mechanical helical thread system with a friction-based mechanical system. Instead of using threaded rod and nut connections, the invention uses friction discs pressed against each other by a support member to transmit torque, replacing a complex mechanical engagement system with a simpler friction-based system.
2Speed
If clearance uptake mechanism is used in the rotation drive means, then the support member can be raised, but response time increases due to latency
Solution Approach 1:
The patent eliminates the need for preliminary clearance uptake by designing the rotation drive means so that the support member is immediately raised when torque threshold is reached. The friction discs directly lift the support member without requiring prior clearance adjustment, performing the necessary action instantly rather than after a delay.
Solution Approach 2:
The patent removes the clearance uptake mechanism from the rotation drive means, extracting the unnecessary intermediate step that caused latency. The support member is directly raised by the friction discs without requiring clearance adjustment, eliminating the time delay associated with the clearance uptake process.
3Ease of manufacture
If multiple separate components are used in the transmitter member, then assembly flexibility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple separate components (support member, friction discs, and rotation drive means) into a single integrated transmitter member. This consolidation simplifies manufacturing by reducing the number of separate parts that need to be produced and assembled, while maintaining the functional complexity needed for threshold torque transmission.
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 enables faster response and simplified manufacturing by directly raising the support member as torque increases, allowing the discs to slide and release the elements against a resisting frictional torque, improving efficiency and reducing manufacturing complexity.
Implementation Method 1
pressing the discs together and against a support plate of the first element
Implementation Method 2
rotation drive means interposed between the support member and the second element which are arranged to cause axial displacement of the support member against the presser member during relative rotation of the support member and the second element
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a mechanical device for the transmission of a force with a threshold, including: a first element (1; 101) and a second element (2; 102) mounted such that they rotate in relation to one another about an axis of rotation (X), and a transmission member (10; 110) which is disposed between the aforementioned two elements and which secures the two elements to one another in rotation when a torque is applied to one of the elements so that said torque can be transmitted from one of the elements to the other, up to a threshold torque above which the two elements can rotate against a resistive torque equal to the threshold torque. According to the invention, the transmission member includes: at least a first friction disk (11; 111) rotatably fixed to the first element and a second friction disk (12; 112) opposite the first disk; a bearing member (13; 113) which can move axially such that, under the action of a press member, it can press the disks together and against a bearing plate (15; 115) of the first element; and rotation driving means (20, 21; 120, 121) disposed between the bearing member and the second element, which are provided to generate the axial movement of the bearing member against the spring member during a rotation.