2 results about "Mechanical efficiency" patented technology

An object is to increase the mechanical efficiency of an injection molding machine, decrease the inertia, and decrease the axial length. The injection molding machine comprises a cylinder member; an injection member disposed within the cylinder member such that the injection member can advance and retract; an injection motor (82); and a transmission shaft which is connected to the injection member such that the transmission shaft can rotate relative to the injection member. The transmission shaft has a rotation transmission portion, to which rotation of the injection motor (82) is transmitted, as well as a motion conversion portion for converting rotational motion to linear motion. The injection motor (82) and the transmission shaft are disposed on the same axis, and the transmission shaft is advanced and retracted inside the rotor (92) of the injection motor (82). In this case, since rotation of the injection motor (82) is transmitted directly to the transmission shaft without intervention of a speed reduction mechanism, a pulley, and the like, mechanical efficiency can be improved, and inertia can be decreased. Further, the time required for changeover from the injection stage to the pressure holding stage is shortened. Since the transmission shaft is advanced and retracted inside the rotor (92) of the injection motor (82), the injection molding machine can be reduced in axial length.

The invention discloses a compressor and an air conditioning system. The compressor comprises a pump body and a crankshaft having an eccentric part, wherein the pump body comprises: a gas cylinder, wherein the gas cylinder has a gas cylinder chamber and a blade groove positioned on the inner circumferential surface of the gas cylinder chamber; an upper cylinder cover and a lower cylinder cover forclosing the gas cylinder chamber; a first piston and a second piston positioned in the gas cylinder chamber, wherein the first piston is sleeved outside the second piston, the first piston and the second piston can slide opposite to each other, the second piston sleeve is sleeved outside the eccentric part of the crankshaft, and the second piston and the eccentric part of the crankshaft can slideopposite to each other; and a blade, wherein the blade projects out from the blade groove into the gas cylinder chamber, forms butt joint with the first piston, and separates the gas cylinder chamberinto a high pressure side and a low pressure side. With the compressor of the present invention, the friction loss between the piston and the eccentric part of the crankshaft can be reduced so as toimprove the mechanical efficiency of the compressor.