Cable Tensioner With Integrated Gauge for Precise Tension Control
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Solution Overview
Problem
Devices that rely on cable tension for operation face challenges in maintaining precise tension to prevent slippage and unnecessary wear, as existing mechanisms are inefficient in controlling and adjusting cable tension effectively.
Innovation Solution
An actuator system comprising a motor, shaft, tension elements, a cable tensioner with a compound screw, spring nut, and compression spring, along with a tension gauge, which allows for precise adjustment and indication of cable tension, ensuring optimal operation and minimizing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable tensioning mechanism is provided, then cable tension control is improved, but device complexity increases
Solution Approach 1:
The cable tensioner integrates multiple components within a nested structure where the compound screw mechanism is housed within the actuator body, the spring nut is positioned within the compound screw structure, and the compression spring is contained within the spring nut assembly. This nesting approach provides complete cable tension control functionality while minimizing the overall device footprint and reducing apparent complexity.
Solution Approach 2:
The patent combines the tension adjustment mechanism (compound screw and spring nut) with the tension indication system (gauge) and the load-bearing element (compression spring) into a single integrated cable tensioner assembly. This merging of functions into one compact unit provides reliable cable tension control without requiring separate mechanisms for each function, thereby limiting the increase in device complexity.
2Manufacturing precision
If tension adjustment mechanism is added, then manufacturing precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The cable tensioner is divided into distinct functional segments: the compound screw mechanism for tension adjustment, the spring nut for maintaining tension, the compression spring for load bearing, and the gauge for indication. Each segment can be manufactured and assembled independently, allowing for precise manufacturing of each component while simplifying the overall manufacturing process through modular assembly.
Solution Approach 2:
The compound screw mechanism incorporates a spring nut that allows dynamic adjustment of cable tension. The spring-loaded design enables the mechanism to self-adjust and maintain optimal tension through the elastic deformation of the compression spring, providing manufacturing precision through a simple, repeatable spring-based mechanism rather than requiring complex precision machining.
3Device complexity
If compact design is implemented, then device complexity is reduced, but ease of operation deteriorates
Solution Approach 1:
The cable tensioner utilizes the axial dimension of the actuator body to house the compound screw and spring mechanisms along the length of the actuator rather than requiring lateral space. This dimensional arrangement provides a compact design that fits within the existing actuator footprint while keeping the tension adjustment mechanism accessible through the end of the actuator body, maintaining ease of operation.
Solution Approach 2:
The spring-loaded tensioning mechanism automatically maintains proper cable tension through the elastic properties of the compression spring, eliminating the need for continuous manual adjustment. The system self-regulates tension based on cable length and load conditions, making the compact design equally easy to operate as larger mechanisms since no complex manual intervention is required.
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 enables precise control of cable tension, reducing slippage and wear, and allows for easy field inspection and service, balancing load capability with cable longevity and compact design.
Implementation Method 1
a compression spring, wherein the compression spring is mounted between the spring cup and the second end of the cable
Implementation Method 2
a compound screw, wherein the spring nut is threaded to the compound screw
Implementation Method 3
The tension gauge is mounted adjacent the tension adjuster to indicate a tension of the second tension element
Data Source
AI summary
An actuator includes a motor, a shaft, an actuator body, a first tension element, a cable tensioner, and a tension gauge. The shaft is mounted to the motor. The actuator body includes a first anchor body and a second anchor body. The first tension element is mounted to encircle the shaft and includes a first end and a second end. The first end of the first tension element is mounted to the first anchor body of the actuator body. The cable tensioner is mounted to the second anchor body of the actuator body and includes a tension adjuster, a second tension element, and a tension element terminator. The second tension element is mounted to the tension adjuster. The second end of the first tension element is mounted to the second tension element. The tension gauge is mounted adjacent the tension adjuster to indicate a tension of the second tension element.