Plastic Air Pump Mechanism with Metal Insert for Weight Reduction
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Solution Overview
Problem
Existing air pumps are heavy, costly, and inconvenient to install due to their complex metal construction, which increases vehicle weight and fuel consumption, and they fail to withstand high temperature and pressure conditions when made entirely of engineering plastics.
Innovation Solution
A plastic air pump mechanism with a plastic body and actuating unit, featuring a metal large body insert at the air outlet, simplifies production and installation, reduces weight, and enhances durability by using high-strength nylon materials mixed with glass fiber for the plastic components and brass for the metal insert.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air pumps are made of alloy materials (aluminum alloy, seamless steel pipe, or alloy mixed with plastic), then they can meet requirements of high pressure and high temperature resistance, but the manufacturing process is complicated, weight is too high, cost is high, and installation is inconvenient
Solution Approach 1:
The patent uses composite materials by combining engineering plastic (for the main body) with metal reinforcement elements (large body insert made of metal material embedded in the air outlet). This allows the plastic air pump to achieve the high pressure and high temperature resistance of metal materials while maintaining the weight and manufacturing advantages of plastic materials.
Solution Approach 2:
The patent applies local quality by using metal material only at critical areas (the large body insert at the air outlet) where high pressure and high temperature resistance is most needed, while the rest of the air pump body is made of lightweight engineering plastic. This localized reinforcement reduces overall complexity compared to using metal throughout.
2Reliability
If air pumps are made of alloy materials, then they can withstand high pressure and high temperature, but the weight of the air pump is too high, increasing self weight of vehicle and fuel consumption
Solution Approach 1:
The patent employs composite materials combining engineering plastic with metal reinforcement insert. The plastic body provides lightweight construction while the embedded metal insert at the air outlet provides the necessary high pressure and high temperature resistance, achieving a favorable weight-to-strength ratio.
Solution Approach 2:
Metal material is applied locally only at the air outlet area where it is most needed for withstanding high pressure and temperature, rather than using metal throughout the entire air pump. This localized approach significantly reduces overall weight while maintaining reliability at critical points.
3Reliability
If air pumps are made of alloy materials, then they can meet pressure requirements, but connection among components requires large number of set screws, increasing installation time and cost
Solution Approach 1:
The patent merges multiple components into an integrally formed plastic body structure, reducing the number of separate parts that need to be assembled with set screws. The plastic body and plastic bracket are integrated, and the large body insert is embedded during manufacturing, significantly reducing assembly complexity and installation time.
Solution Approach 2:
The use of composite materials allows for integration of metal reinforcement elements during the plastic molding process, creating a unified structure that requires fewer separate connections and fasteners compared to traditional all-metal construction.
Data Source
AI summary
The application discloses a plastic air pump mechanism, which comprises a plastic body, a plastic output unit and an actuating unit; the plastic body has an integrally forming structure, which comprises a plastic cylinder and a plastic bracket disposed at an air inlet end of the plastic cylinder; the plastic output unit is detachably connected to an air outlet end of the plastic cylinder; the actuating unit comprises a motor, plastic gears disposed on the plastic bracket and electrically connected to the motor, and a plastic rocker arm driven by the plastic gears to realize reciprocating of a piston in the plastic cylinder; and a large body insert of metal is provided in an air outlet of the plastic cylinder. The plastic air pump mechanism can reduce product weight, simplify production and installation processes, save materials and labor costs, and reduce self weight of a vehicle.