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Motor direct drive air pump and related applications thereof

Motor direct drive air pump and related applications thereof description/claims

The invention relates to an air pump, and more particularly to a motor direct drive air pump having a motor directly outputs power to drive the air pump, and the outputted power does not need to go through an additional coupling.

A conventional ventilation device usually comprises a housing with an air inlet and an air outlet, and has therein a pair of impellers that may be coupled to each other and rotate toward opposite directions, respectively. When one of the impellers passes by the air inlet, a fixed amount of air is captured between the impellers and the housing, then transported and allowed to exit via the air outlet by the rotating impellers. As the rotation of the impellers is repeated, the ventilation device may put out a fixed proportion of air.

A spiral pump of prior arts having a driving valve and a piston was disclosed in the U.S. Pat. No. 4,772,187. A plurality of arc-shaped surfaces are externally disposed on the driving valve, while a plurality of arc-shaped indentations are internally disposed on the main shaft of the driving valve, and the piston includes a plurality of semi-ellipsoid blades and a raised portion. When driven by an external force, the piston of the pump is allowed to spin, so that the liquid within the pump pushes the liquid around the inlet to the outlet under pressure.

A spiral compressor of prior arts having a spiral serrated male rotor and a spiral serrated female rotor that may be coupled together was disclosed in the U.S. Pat. No. 6,948,915. The compressor is connected to a housing, and the housing has a high-speed electric motor therein, the motor comprises a rotor, a stator, and an output shaft. The output shaft may drive at least a male rotor and a female rotor.

The U.S. Pat. No. 6,439,865 also discloses an air pump of prior arts, which comprises a chamber disposed in a housing, and has a suction portion, a pressurizing portion, and a conversion portion formed therein. The chamber has therein a pair of rotors that may be coupled to each other, and each of the rotors has at least three impellers disposed thereon; the impellers of the two rotors are disposed toward different directions, and thus defining spaces between the impellers in the air pump.

The underlying mechanism of the aforesaid compressors and air pumps is considerably similar to that of the ventilation device, in which a space is present and has pairs of impellers that may be coupled to each other disposed therein. The impellers or rotors are driven via an external driving device (such as a motor), so as to push the air or liquid in the space from an inlet to an outlet.

However, the ventilation devices of the prior arts must rely on a coupling linked to an external driving device (such as a motor), so as to be driven by a force and operate. This renders the overall size of the ventilation device needlessly large, and results in the fact that the ventilation device must be built with an excessive number of mechanical parts, thus the ventilation device not only occupies a lot of physical space, but also costs more to manufacture.

In light of the aforesaid problems, an air pump with smaller physical size and less mechanical parts is required, and the invention has proposed a novel and more advanced motor direct drive air pump in response to such requirement. The motor direct drive air pump of the invention comprises a housing, a first shaft, and a second shaft. The housing has a left cover, a right cover, and a central partition to form a left space and a right space, wherein one of the spaces is a compression chamber having at least an air inlet and an air outlet openly disposed on lateral walls thereof; the other space has a transmission chamber and a driving chamber, and stators are disposed in the driving chamber. Moreover, the first shaft is fittingly disposed through the central partition of the housing; a first impeller is embedded at a portion of the first shaft located in the compression chamber; a first gear is embedded at a portion of the first shaft located in the transmission chamber, and a rotor is embedded at a portion of the first shaft located in the driving chamber. Furthermore, the second shaft is fittingly disposed through the central partition of the housing; a second impeller is embedded at a portion of the second shaft located in the compression chamber; a second gear is embedded at a portion of the second shaft located in the transmission chamber, and the second impeller and the second gear are respectively coupled to the first impeller and the first gear. Therefore, a power outputted from a motor may directly drive the first impeller and the second impeller in the compression chamber and allow the air pump to operate, without needing to go through an additional coupling.

A primary objective of the invention is to propose a motor direct drive air pump having a smaller physical size.

Another objective of the invention is to propose a motor direct drive air pump having less mechanical parts.

Still another objective of the invention is to propose a motor direct drive air pump having less transmission loss over forces generated from a motor.

Still another objective of the invention is to propose a motor direct drive compressor having a smaller physical size.

Still another objective of the invention is to propose a motor direct drive compressor having less mechanical parts.

Still another objective of the invention is to propose a motor direct drive compressor having less transmission loss over forces generated from a motor.

A further objective of the invention is to propose a motor direct drive vacuum pump having a smaller physical size.

A further objective of the invention is to propose a motor direct drive vacuum pump having less mechanical parts.

A further objective of the invention is to propose a motor direct drive vacuum pump having less transmission loss over forces generated from a motor.

• Provisional Patent
• Utility Patent

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