Continuous Transmission System Using Conical Pulleys
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Solution Overview
Problem
Conventional transmission systems experience discernible jerks during gear shifts due to stepped shifting between gear ratios, and they have limited ability to achieve large speed and power ratio variations, which is costly and inefficient.
Innovation Solution
A continuous transmission system with an input sliding gear that slides tangentially along a main disc, allowing for variable contact point diameter and smooth speed and power ratio changes, enabling larger ratio variations and eliminating jerks during shifting, using anti-slipping materials and a simplified mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional stepped gear transmission is used, then the transmission mechanism is simple, but discernible jerks occur during gear shifts
Solution Approach 1:
The patent applies the dynamics principle by making the transmission ratio continuously variable rather than fixed in discrete steps. The conical pulleys allow the transmission ratio to change dynamically and continuously as the belts move along the conical surfaces, eliminating the stepped shifts that cause jerks while maintaining operational smoothness.
2Device complexity
If conventional transmission is used, then the mechanism is simple, but large speed and power ratio variations are difficult to achieve
Solution Approach 1:
The patent applies parameter changes by utilizing the conical geometry of the pulleys, where the effective diameter varies continuously from the base to the apex. This geometric parameter change enables the transmission ratio to vary over a wide range (from 6:1 to potentially higher ratios) while keeping the mechanism relatively simple, achieving both adaptability and simplicity.
3Ease of operation
If Multitronic continuous variable transmission is used, then smooth shifting is achieved, but the cost is very high
Solution Approach 1:
The patent applies this principle by using simpler, more cost-effective components to achieve continuous variable transmission. Instead of complex electronic controls, hydraulics, and precision mechanisms found in expensive CVT systems, this invention uses basic conical pulleys with belts, which are cheaper to manufacture while still providing smooth continuous shifting.
4Productivity
If dual-clutch transmission is used, then gear changes occur without interrupting power flow, but the device complexity and cost are very high
Solution Approach 1:
The patent applies continuity of useful action by maintaining continuous power flow through the conical pulley system. As the belts continuously move along the conical surfaces, power is transmitted without interruption, and the transmission ratio changes smoothly and continuously, eliminating the need for complex multi-clutch systems.
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 system achieves smooth speed and power transitions without jerks and allows for significantly larger gear ratios than conventional systems, providing efficient and silent operation with a simpler design.
Implementation Method 1
the main disc surface, as well as the sliding gear perimetral surface, are made up of anti-slipping material
Data Source
AI summary
Patent of invention for a transmission comprising a frame (1) provided with tracks (2) and a control carriage (3) having a control lever (3a) journaled in a bearing (3b) and spacers (3c and 3d) connecting the control carriage (3) to the switches (4 and 5) in their spin shaft (4a and 5a), colinear to the guide cutout shaft (4b and 5b) describing (FIGS. 25 to 28) a conicity which allows a limited angular movement between the switches (4 and 5) and the track (2), obtained by the control lever (3a) motion by means of control arms (3e) coupled to the switch bearings (4c and 5c), perpendicular to the spacers (3c and 3d) making up the primary (6) and secondary (7) input sliding assemblies, and having a variant (FIGS. 14 to 21) with two output sliding assemblies, primary (9) and secondary (10), each configured as the two input sliding assemblies, primary (6) and secondary (7), and another variant (FIGS. 22 to 24) with at least one articulated output sliding assembly (15).