A system for use in a scroll compressor is described. The system comprises a crankshaft with a first end portion, wherein the crankshaft defines an axis of rotation, and slider block having a recess, wherein the first end portion of the crankshaft and the recess in the slider block are configured for connecting the slider block to the first end portion. The first end portion of the crankshaft comprises a first flat contact surface portion and the recess of the slider block comprises a second flat contact surface portion, the first and second contact surface portions facing each other when the first end portion is connected to the slider block. The system is characterized in that at least one of the flat contact surface portions comprises a slit beneath the at least one flat contact surface portion. Further, a corresponding slider block and a corresponding crankshaft are described.

A scroll compressor includes a compressing mechanism unit including a fixed scroll that is fixedly provided in a shell and an orbiting scroll that moves around the fixed scroll, the compressing mechanism unit compressing fluid; a main shaft including an eccentric shaft portion at one end thereof that transmits a rotational driving force to the orbiting scroll; a slider having a slide groove in which the eccentric shaft portion is slidably fitted; and an orbital bearing provided to the orbiting scroll that rotatably supports the slider. The slider is provided on the inner peripheral side of the orbital bearing when seen in a direction of a center axis of the slider. The center axis of the slider is eccentric in one direction from an axis of rotation of the main shaft and a center of gravity of the slider is eccentric in an opposite direction.

Disclosed herein is a scroll compressor having a shaft balancer capable of attenuating vibration while preventing deformation of the rotary shaft during operation at a high speed.

A scroll-type compressor includes: a movable scroll including a low-stage movable tooth portion having a spiral shape and protruding from a first side of a movable substrate portion in an axial direction, and a high-stage movable tooth portion having a spiral shape and protruding from a second side of the movable substrate portion in the axial direction; and a shaft arranged to extend through the movable substrate portion and causing the movable scroll to undergo revolution motion. A low-stage compression mechanism and a high-stage movable compression mechanism are provided on opposite sides of the movable substrate portion in the axial direction. The numbers of curling of the low-stage movable tooth portion and the high-stage movable tooth portion are set to be one.

A scroll compressor comprises a fixed bearing seat, a scroll fixed disk, a scroll orbiting disk, and an orbiting disk bearing seat. On the orbiting disk bearing seat, there are circumferentially three first bearing bores, and on the fixed bearing seat, there are circumferentially three second bearing bores. The front end of the locating crankshaft is rotatably connected inside the first bearing bore through the first bearing, and the rear end of the locating crankshaft is rotatably connected inside the second bearing bore through the second bearing. There is a through hole on the bottom face of the second bearing bore. The rear end of the locating crankshaft passes through the second bearing and is inserted inside the through hole. In addition, the end on which the locating crankshaft passes through the second bearing is screw connected with a locking nut.

A scroll compressor includes a stationary scroll; an orbiting scroll having a pair of first Oldham keyways on one surface thereof, the orbiting scroll defining a compression chamber in combination with the stationary scroll; a frame having a pair of second Oldham keyways and supporting the orbiting scroll; and an Oldham ring for inhibiting rotation of the orbiting scroll, the Oldham ring having a pair of first Oldham keys on one surface thereof and a pair of second Oldham keys on the other surface thereof, the first Oldham keys slidably engaging with the respective first Oldham keyways, the second Oldham keys slidably engaging with the respective second Oldham keyways. The Oldham ring includes at least a pair of projections on the other surface thereof, and the projections have a height such that when the Oldham ring is inclined during simple harmonic motion, one of the projections makes contact with the one surface of the orbiting scroll before each of the first Oldham keys is brought into contact with the corresponding first Oldham keyway at two locations.

A balance device for an internal combustion engine includes a crankshaft and a balance shaft. The crankshaft includes a CS eccentric weight. The balance shaft includes a BS eccentric weight. A CS connected point deviated from the CS main shaft, and a BS connected point deviated from the BS axial shaft are connected with a connection rod. A CS connection mechanism that enables relative rotation of the crankshaft and the connection rod is provided at the CS connected point. A BS connection mechanism that enables relative rotation of the balance shaft and the connection rod is provided at the BS connected point. A guide section guides a motion of the connection rod so that the balance shaft rotates in an opposite direction to the crankshaft.

In a rotary compressor, a lower end plate cover is formed in a flat plate shape, a lower discharge chamber concave portion is formed in a lower end plate to overlap a lower discharge hole side of a lower discharge valve accommodation concave portion, and the lower discharge chamber concave portion is formed in a fan-like range between a diametrical line passing through a center of a sub-bearing unit and a midpoint of a line segment connecting a center of the lower discharge hole and a center of a lower rivet to each other and a diametrical line opened by a pitch angle 90° in a direction of the lower discharge hole about the center of the sub-bearing unit. At least a portion of a refrigerant path hole overlaps the lower discharge chamber concave portion and is disposed at a position communicating with the lower discharge chamber concave portion.

A compressor includes a drive shaft having a main shaft and an eccentric portion, and a compression mechanism having a fitted tubular portion into which a fitted shaft portion of the drive shaft is fitted. The fitted shaft portion and the fitted tubular portion slide relative to each other with an oil film interposed between. The fitted tubular portion has first and second sliding surfaces formed as portions of an inner peripheral surface of the fitted tubular portion in the circumferential direction. The second sliding surface has a smaller axial width than the first sliding surface. A sliding portion between the fitted shaft portion and the fitted tubular portion has a gap adjacent to the second sliding surface into which a lubricating oil flows, and an oil retainer to keep the lubricating oil in the gap from flowing out toward an end surface of the fitted tubular portion.

A main bearing is disposed on one surface of a first cylinder, an intermediate plate is disposed on another surface of the first cylinder, the intermediate plate is disposed on one surface of a second cylinder, and an auxiliary bearing is disposed on another surface of the second cylinder. A shaft is constituted by a main shaft portion, a first eccentric portion, a second eccentric portion, and an auxiliary shaft portion. A first eccentric portion center position (H1/2) which is the center position of the first eccentric portion in height (H1) is located at a position closer to the main bearing than a first piston center position (P1/2) which is the center position of a first piston in height (P1). A second eccentric portion center position (H2/2) which is the center position of the second eccentric portion in height (H2) is located at a position closer to the auxiliary bearing than a second piston center position (P2/2) which is the center position of a second piston in height (P2).