Post Driver Reverse Twisted Spring Assembly Vibration Control
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Solution Overview
Problem
Post drivers experience frequent spring deterioration and fracture due to vibrational forces, leading to reduced hitting force, potential malfunctions, and hazardous breakdowns, requiring frequent maintenance and downtime for repairs.
Innovation Solution
A post driver equipped with a reverse twisted or spiral spring assembly within the spring, which reduces vibration and increases durability, allowing for less frequent maintenance and extended longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional spring assembly is used in the post driver, then the device can provide the necessary hitting force to drive posts into the ground, but the spring is subject to great vibrational forces that cause deterioration and fracture over time
Solution Approach 1:
The spring assembly is divided into two separate springs: an outer spring and an inner reverse twisted spring. Each spring operates independently but works together to provide the necessary hitting force while distributing the vibrational stresses, thereby improving durability without sacrificing force output.
Solution Approach 2:
The invention uses a composite spring system combining two different spring configurations (outer spring and inner reverse twisted spring) to create a unified assembly that leverages the advantages of both designs: the outer spring provides structural support and the inner reverse twisted spring provides additional force while reducing vibration through counteracting motion.
2Productivity
If the spring deteriorates or fractures due to vibrational forces, then the post driver can continue to operate with reduced hitting force, but broken spring parts can get caught between the carriage and the ram leading to malfunctioning and hazardous breakdowns
Solution Approach 1:
The reverse twisted inner spring is installed beforehand to counteract vibrational forces and reduce stress on both springs. This preventive measure cushiones against the harmful effects of vibration before they can cause deterioration or fracture, thereby preventing malfunction and hazardous breakdowns before they occur.
Solution Approach 2:
The invention converts the harmful vibrational forces into a beneficial effect by using the inner reverse twisted spring to generate counteracting vibrations. The harmful vibration that would normally cause spring failure is transformed into a force that protects the springs from deterioration, allowing continuous operation without malfunction or hazard.
3Reliability
If springs are frequently replaced due to deterioration and fracture, then the post driver can maintain reliable operation, but the device is taken out of operation for repair leading to lost time and delay in constructing the fence
Solution Approach 1:
By segmenting the spring assembly into two independent springs, the system distributes the mechanical stress and reduces the frequency of failure. The outer spring and inner reverse twisted spring work together to share the load, meaning that if one spring begins to deteriorate, the other continues to provide support, thereby maintaining reliability and reducing downtime for repairs.
4Device complexity
If a single spring is used in the post driver, then the device structure remains simple, but the spring is subjected to greater vibrational forces that reduce its lifespan
Solution Approach 1:
The spring assembly is segmented into an outer spring and an inner reverse twisted spring, allowing the vibrational forces to be distributed between two separate components rather than concentrated on a single spring. This segmentation increases the overall lifespan of the spring assembly while maintaining relatively simple device structure.
Solution Approach 2:
The composite spring system combines two different spring designs to create a unified assembly that extends lifespan. The outer spring and inner reverse twisted spring work together as a composite structure, where each spring contributes to the overall durability and load-bearing capacity, thereby increasing lifespan without excessive complexity.
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 reverse twisted or spiral spring assembly significantly reduces vibration, extends the lifespan of the springs, and minimizes downtime for repairs, ensuring reliable and efficient operation with reduced maintenance needs.
Implementation Method 1
The reverse twisted or spiral spring assembly significantly reduces vibration
Implementation Method 2
springs are subject to great vibrational forces over time
Data Source
AI summary
A post driver having a reverse twisted spring is disclosed which comprises a carriage, a driving ram which is movable relative to the carriage, a hydraulic cylinder assembly having a threaded hydraulic cylinder rod extending out of a first end of the hydraulic cylinder assembly, the threaded hydraulic cylinder rod capable of movement out of the hydraulic cylinder assembly and retracted back into the hydraulic cylinder assembly, the threaded hydraulic cylinder rod being connected to the driving ram, the hydraulic cylinder assembly having a second end being connected to the carriage, and a spring assembly comprising an outer spring and a reverse twisted spring within the outer spring, a first end having a screw-in plug, a threaded rod extending out of the screw-in plug in the first end with the threaded rod being connected to the driving ram, and a second end connected to the hydraulic cylinder assembly.