Forged Steel Manifold Power Unit for Hydraulic Floor Jack
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Solution Overview
Problem
Hydraulic floor jacks experience significant wear and tear, leading to a limited service life of approximately 5000 cycles due to the failure of components within the power unit, necessitating improvements in durability and performance.
Innovation Solution
The hydraulic power unit is enhanced with a forged steel manifold, a ram assembly with a bronze-coated ram bearing and nylon backup ring, polyurethane seals, and a uni-welded construction, along with specific micro-finishes and coatings to reduce friction and extend the service life beyond 10,000 cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydraulic floor jack components are used, then the device is easier to manufacture and operate, but the service life is limited to approximately 5000 cycles due to component failure from wear and tear
Solution Approach 1:
The patent applies composite materials by combining forged steel manifold with welded construction, using bronze-coated ram bearings with nylon backup rings, and polyurethane seals. This multi-material approach creates a composite power unit structure that resists wear and tear better than conventional single-material components, extending service life beyond 5000 cycles to over 10,000 cycles while maintaining manufacturing feasibility through established fabrication processes
Solution Approach 2:
The patent changes critical parameters of the power unit components including specifying HRC hardness values (30-34 for ram assembly, 28-32 for ram bearing), micro-finish values (16 for cylinder, 32 for bearing surfaces), and polyurethane seal hardness (95 shore A). These parameter optimizations enhance component durability and resistance to wear, directly addressing the reliability issue without significantly complicating the overall device structure
2Reliability
If forged steel manifold with welded construction and precise micro-finishes are applied, then the durability and service life extend beyond 10,000 cycles, but the manufacturing complexity and precision requirements increase
Solution Approach 1:
The patent applies local quality by specifying different micro-finish values for different surfaces: 16 micro-finish for the cylinder interior surface and 32 micro-finish for the ram bearing surfaces. This localized precision approach ensures optimal performance where needed (smooth hydraulic surfaces and low-friction bearing areas) without unnecessarily increasing manufacturing complexity across the entire component. The forged steel manifold and welded construction are applied locally to critical structural areas requiring enhanced strength and wear resistance
3Object-affected harmful factors
If bronze coating and nylon backup ring are added to the ram bearing, then friction is reduced and wear is minimized, but the device complexity increases
Solution Approach 1:
The patent uses composite materials in the bearing assembly by combining a bronze-coated ram bearing with a nylon 1010 backup ring. The bronze coating (with specified HRC 28-32 and micro-finish 32) provides low-friction sliding surfaces, while the nylon backup ring provides additional wear protection and shock absorption. This composite bearing assembly effectively reduces friction and wear on the hydraulic piston, addressing the harmful factors without requiring a complete redesign of the bearing structure
Solution Approach 2:
The nylon backup ring acts as an intermediary protective element between the bronze-coated bearing and the cylinder wall. This intermediate component absorbs shock loads and prevents direct metal-to-metal contact, reducing the harmful effects of friction and wear on the primary bearing surfaces while maintaining the overall bearing assembly functionality
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 modifications result in a significantly improved durability and performance life of the hydraulic floor jack power unit, extending its service life beyond the conventional 5000 cycles to over 10,000 cycles by addressing wear and tear issues.
Implementation Method 1
The pump is operated by means of a handle which is pumped up and down to produce hydraulic pressure
Implementation Method 2
a ram bearing secured to a first end of the ram, the ram bearing having an external bronze coating
Implementation Method 3
the cylinder having a 45 steel and a 32 micro finish
Data Source
AI summary
A power unit for a hydraulic floor jack is provided having a unitary forged steel manifold engaged with a ram assembly, the ram assembly and manifold being selected from materials and finishes that when interacting with a cylinder bearing, exhibits a longer performance life.