Air pump
First Claim
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1. An air pump, comprising:
- an upper cover, a valve seat, an airbag seat, a base, airbags, a crank shaft, a drive shaft, an eccentric wheel and an electric motor,wherein;
a lower end of the drive shaft is in active connection with a hole wall of an eccentric hole of the eccentric wheel,vents are opened on the hole wall of the eccentric hole to use as a heat sink and pass through said hole wall radially, allowing the lower end of said drive shaft to be exposed to the outside through said vents, andsaid lower end of said drive shaft, corresponding to said vents, is formed into a reduced diameter section, allowing edges of said vents to be positioned on said reduced diameter section.
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Accused Products
Abstract
An air pump is disclosed, the lower end of a drive shaft is in active connection with an eccentric hole on an eccentric wheel, and vents are opened on a hole wall of the eccentric hole to use as a heat sink in such a way to expose the lower end of the drive shaft to the outside through the vents, thereby facilitating cooling. In addition, the lower end of the drive shaft is formed into a reduced diameter section corresponding to vents, the edges of which are positioned on the reduced diameter section so as to increase an avoidance clearance, avoiding the friction generated between burrs generated on the edge of the vent upon manufacturing and the drive shaft, thereby improving the product life.
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Citations
14 Claims
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1. An air pump, comprising:
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an upper cover, a valve seat, an airbag seat, a base, airbags, a crank shaft, a drive shaft, an eccentric wheel and an electric motor, wherein; a lower end of the drive shaft is in active connection with a hole wall of an eccentric hole of the eccentric wheel, vents are opened on the hole wall of the eccentric hole to use as a heat sink and pass through said hole wall radially, allowing the lower end of said drive shaft to be exposed to the outside through said vents, and said lower end of said drive shaft, corresponding to said vents, is formed into a reduced diameter section, allowing edges of said vents to be positioned on said reduced diameter section. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. An air pump, constituted by an upper cover, a valve seat, an airbag seat, a base, airbags, a crank shaft, a drive shaft, an eccentric wheel and an electric motor, an upper end of said drive shaft being in active connection with a central hole on a lower end of said crank shaft, wherein vents are opened on a hole wall of said central hole to use as a heat sink, allowing said upper end of said drive shaft to be exposed to the outside through said vents, and said upper end of said drive shaft corresponding to said vents is formed into a reduced diameter section, allowing edges of said vents to be positioned on said reduced diameter section.
Specification