Double Cable Motion Transmission Device for Reversible Rotation
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Solution Overview
Problem
Double-cable motion transmission devices typically require additional mechanical elements to reverse the rotation direction of rotary elements, such as in air conditioning systems, which complicates production and increases costs.
Innovation Solution
A control system with identical double-cable motion transmission assemblies, each comprising a plastic case and pulley with complementary prismatic surfaces, allowing for reversible rotation configurations without additional components by rotating one assembly 180° about the transmission cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional mechanical elements are combined with the control assembly to reverse rotation direction, then the reverse rotation configuration is achieved, but the device complexity and production cost increase
Solution Approach 1:
The patent makes the coupling seats universal by providing identical first and second coupling seats on the hub part, each capable of receiving control member shafts. This allows the same motion transmission device to be used in both matching rotation configuration and reverse rotation configuration without requiring different mechanical elements, thereby reducing device complexity while maintaining adaptability to different rotation directions
Solution Approach 2:
The patent enables reverse rotation configuration by inverting the mounting orientation of the motion transmission device. Specifically, the device can be mounted with the pulley side facing either the support wall or away from it, and the control member can be coupled to either the first or second coupling seat. This inversion approach allows the same components to achieve opposite rotation directions without adding extra mechanical elements
2Adaptability or versatility
If additional mechanical elements are combined with the control assembly to reverse rotation direction, then the reverse rotation configuration is achieved, but production cost increases
Solution Approach 1:
The patent makes the coupling seats universal by providing identical first and second coupling seats on the hub part, each capable of receiving control member shafts. This allows the same motion transmission device to be used in both matching rotation configuration and reverse rotation configuration without requiring different mechanical elements, thereby reducing device complexity while maintaining adaptability to different rotation directions
Solution Approach 2:
The patent merges the functions of multiple potential components into a single motion transmission device. By integrating identical coupling seats that can accommodate both matching and reverse rotation configurations, the design eliminates the need for separate mechanical elements for each configuration, thereby simplifying production and reducing costs
Data Source
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AI summary
Control system comprising a first and a second assembly (PC, UH), each assembly comprising a support wall (W, W') and a rotary control member (CM, CM'), and a double-cable motion transmission assembly. Each control member comprises a shaft (S; S'). The shaft (S) of the control member (CM) of the first assembly (PC) is fitted into a first coupling seat (50b) of a rotating pulley (24) of a first device (12) of the motion transmission assembly, and the shaft (S') of the control member (CM') of the second assembly (UH) is fitted into a second coupling seat (50c) of a rotating pulley (24) of a second device (12) of the motion transmission assembly, so that the first device (12) has its pulley side facing the support wall (W) of the first assembly (PC), and the second device (12) has its base side facing the support wall (W') of the second assembly (UH).