an air pump

Abstract

The invention discloses an air pump, which is composed of an upper cover, a valve seat, an air bag seat, a base, an air bag, a crank rod, a drive shaft, an eccentric wheel and a motor, and a heat dissipation device is provided at the movably connected end of the drive shaft, and the heat dissipation device includes a vent A vent is provided on the hole wall of the movable connection hole of the drive shaft, so that one end of the drive shaft is movably connected through the vent. During high-speed operation, a large amount of heat is generated due to friction between the movable connection end of the drive shaft and the movable connection hole through the vent, which protects the lower end of the eccentric wheel or the crank rod from being deformed or damaged by heat, and ensures smooth transmission. The service life of the air pump is improved, and according to detection, the service life of the present invention is more than 3000 hours.

Description

technical field [0001] The invention relates to an air pump, which is suitable for lumbar support systems of car seats or massage chairs and other equipment. Background technique [0002] In the prior art, the air pump used in the car seat lumbar support system is roughly composed of an upper cover, a valve seat, an air bag seat, a base, an air bag, a crank rod, a drive shaft, an eccentric wheel and a motor. The motor is fixedly installed under the base, and an eccentric wheel is installed on the rotating shaft of the motor. An eccentric hole is formed on the eccentric wheel, and a central hole is formed at the lower end of the curved rod. One end of the drive shaft is fixedly connected and the other end is movable. The upper end of the curved rod radiates from the center to form a group of struts; the airbag seat is installed on the base, and the corresponding curved rods on the airbag seat form a A set of installation holes, airbags are sealed in each installation hole, t...

AI Technical Summary

Problems solved by technology

[0005] 1. One end of the drive shaft is a movable connection. During high-speed operation, there will be friction between one end of the drive shaft and the eccentric hole or central hole. The friction will generate a lot of heat, which will easily cause the matching eccentric wheel or crank rod. The lower end of the pump is softened or even damaged, which interrupts the transmission and directly affects the service life of the air pump. According to tests, the service life of the existing air pump is less than 1800 hours;

[0006] 2. The airbag has a top edge, a capsule body and a bottom column. The top edge is installed in the installation hole of the airbag seat, and the bottom column is installed on the pole of the curved rod. The upper section of the airbag body is a hollow cylinder cavity and the lower section is an extrusion In fact, when inflating, there will be friction between the outer wall of the hollow cylinder cavity and the inner wall of the airbag seat, so the design of the wall thickness and other dimensions of the airbag is very important. If the wall thickness of the airbag is too thin, it will be easily damaged and affect the service life. If the wall thickness of the airbag is too thick, it will not only affect the elasticity of the airbag, but also cause low inflating efficiency and high processing costs;

[0007] 3. The one-way air outlet valve is either a number of single umbrella valves, which makes many components and is inconvenient to install, or it is a diaphragm group, with a central column and four diaphragms radiating from the center, and radiating from the center to the outside. The positioning strip is formed, and the necking section is formed at the connection between the diaphragm and the central column, and the structure is relatively complicated

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