초록 ▼

A gear pump is used in an electrically-operated sealed compressor. The compressor includes a compression mechanism, an electric motor for driving the compression mechanism, and a crankshaft for transmitting the rotational force of the electric motor to the compression mechanism. The gear pump includ

A gear pump is used in an electrically-operated sealed compressor. The compressor includes a compression mechanism, an electric motor for driving the compression mechanism, and a crankshaft for transmitting the rotational force of the electric motor to the compression mechanism. The gear pump includes a pair of gears being in mesh with each other, one of which is connected to one end of the crankshaft, and a pump casing accommodating only the pair of gears. The pump casing together with the gear pair is disposed on one side of a cover plate, while other elements constituting the gear pump are disposed on the other side of the cover plate. By this construction, the distance between the gear pair and an auxiliary bearing to which the gear pump is secured can be reduced and, hence, an undesirable whirling of one end portion of the crankshaft can also be reduced.

대표청구항 ▼

[ What is claimed is:] [1.]1. A gear pump for an electrically-operated sealed compressor having a crankshaft, said gear pump comprising:a pair of gears including a first gear connected to the crankshaft and a second gear in mesh with said first gear; anda substantially flat and substantially oval-sh

[ What is claimed is:] [1.]1. A gear pump for an electrically-operated sealed compressor having a crankshaft, said gear pump comprising:a pair of gears including a first gear connected to the crankshaft and a second gear in mesh with said first gear; anda substantially flat and substantially oval-shaped component connected by only two screws to a support member in the compressor so as to cover said pair of gears, said substantially flat and substantially oval-shaped component having a major axis and a minor axis. [10.]10. A gear pump for an electrically-operated sealed compressor having a crankshaft, said gear pump comprising:a pair of gears including a first gear connected to the crankshaft and a second gear in mesh with said first gear; anda strainer for capturing foreign substances contained in oil to be introduced to said pair of gears, said strainer including a screen having a screen height, said strainer having a substantially round shape and a strainer height, wherein said strainer height is less than a diameter of said strainer, and said strainer height is greater than said screen height.11. The gear pump of claim 10, further comprising a pump cover for covering said strainer, said strainer being press-fitted into said pump cover and including a press-molded frame secured to said screen.12. A gear pump for an electrically-operated sealed compressor having a crankshaft, said gear pump comprising:a pair of gears including a first gear connected to the crankshaft and a second gear in mesh with said first gear; anda strainer for capturing foreign substances contained in oil to be introduced to said pair of gears, said strainer including a screen and a resinous frame injection molded to said screen, said resinous frame being formed of a PBT resin containing 10% to 50% graphite, said frame having a first surface facing said pair of gears, said screen being spaced away from said first surface of said frame.13. The gear pump of claim 12, wherein said frame has a peripheral surface and includes a plurality of radial projections on said peripheral surface.14. The gear pump of claim 12, wherein said frame includes at least one reinforcement rib for supporting said screen.15. The gear pump of claim 12, wherein said frame has a substantially round shape and has at least one radially extending reinforcement rib for supporting said screen.16. A gear pump for an electrically-operated sealed compressor having a crankshaft, said gear pump comprising:a pair of gears including a first gear connected to the crankshaft and a second gear in mesh with said first gear;a cover plate covering said pair of gears;a pump cover mounted to said cover plate and having peripheral edge and a rib formed on an entire circumference of said peripheral edge so as to extend towards said pair of gears;a sealing material interposed between said cover plate and said pump cover, wherein said cover plate, said pair of gears, and said sealing material are accommodated in a space formed by said rib.17. The gear pump of claim 16, wherein said sealing material is substantially flat and substantially oval-shaped.18. The gear pump of claim 16, wherein said pump cover has a substantially flat and substantially oval-shaped portion.19. The gear pump of claim 16, wherein said sealing material comprises a sealing member substantially flat and substantially oval-shaped, said sealing member having a major axis and a minor axis and being asymmetrical with respect to one of said major axis and said minor axis.