Abstract: An object is to maintain housings at equal potentials. Facing insertion holes are formed on mating surfaces of a front housing and a center housing. One end and the other end of a spring pin are inserted into the insertion holes, respectively, and an outer peripheral surface is pressed against inner peripheral surfaces of the insertion holes by an elastic force.

Abstract: In order to ensure shrink-fitted components, such as a casing, to have a desirable force for holding a stator while maintaining a desirable durability, an electric compressor in which the stator is fixed to the casing by shrink fitting is configured as follows. Three protrusions 41f are provided protruding radially inside from the peripheral wall of a first casing 41 so as to be spaced apart from each other in the circumferential direction, and each protrusion 41f is provided with a groove 41f2 which extends in the axial direction in a circumferentially central portion of the protrusion 41f. Protruding end surfaces 41f1 of the protrusions 41f are fixed to the outer periphery of the stator 3 by shrink fitting at contact interfaces therebetween.

Abstract: Electric compressor 1 has electric motor 10 housed in casing 40, the motor including stator 2 having yoke portion 2a and plural tooth portions 2b, and rotor 3 disposed radially inside stator 2. Protrusion 41f protrudes at plural circumferential positions of inner periphery 41a1 of casing 40, which has protruding end surface 41f1 contacting an outer periphery of yoke portion 2a with width larger than tooth portion 2b. Contact tooth back portion 2a11 contacts protruding end surface 41f1, out of plural tooth back portions 2a1 each disposed behind tooth portion 2b as part of the outer periphery of yoke portion 2a, is formed in a region except both edge portions 41h of protruding end surface 41f1 in a circumferential direction within a circumferential angle range ? in which the protruding end surface 41f1 is located.

Abstract: In order to ensure shrink-fitted components, such as a casing, to have a desirable force for holding a stator while maintaining a desirable durability, an electric compressor in which the stator is fixed to the casing by shrink fitting is configured as follows. Three protrusions 41f are provided protruding radially inside from the peripheral wall of a first casing 41 so as to be spaced apart from each other in the circumferential direction, and each protrusion 41f is provided with a groove 41f2 which extends in the axial direction in a circumferentially central portion of the protrusion 41f. Protruding end surfaces 41f1 of the protrusions 41f are fixed to the outer periphery of the stator 3 by shrink fitting at contact interfaces therebetween.

Abstract: Electric compressor 1 including: an electric motor 10 which includes a rotor 2 that has six or eight magnetic poles, and a stator 3 that is disposed radially outside the rotor 2 and that has nine or twelve slots opening toward the rotor 2; a compression mechanism 20 driven by the electric motor 10 to compress refrigerant; and a casing 40 which houses the electric motor 10 and the compression mechanism 20, the electric compressor further includes four or three protrusions 41f formed protruding from either an inner periphery of the casing 40 or an outer periphery of the stator 3 so as to be spaced apart from each other in a circumferential direction, and the stator 3 is fixed to the casing 40 by way of the protrusions 41f.

Abstract: To provide an electric compressor in which a decrease in sealing performance between a housing and an inverter cover is reduced with electrical connection between the housing and the inverter cover being obtained with stability. In an inverter-integrated electric compressor, a peripheral portion of a metal inverter cover 7 is securely fastened to a metal inverter case 6 constituting a housing of an electric compressor with bolts 8. An annular insulating gasket 9 disposed between the inverter case 6 and the inverter cover 7 seals a gap therebetween. The inverter case 6 and the inverter cover 7 are electrically connected to each other with a projection 63 provided on the inverter case 6. The projection 63 is located toward the interior of the inverter case 6 relative to the bolts 8 and the insulating gasket 9.

Abstract: Disclosed is a scroll fluid machine wherein a scroll unit achieves higher performance while maintaining reliability. The disclosed scroll fluid machine is provided with: a first actuation chamber (100) and second actuation chamber (102) partitioned by the central end (98) of a wrap (48, 64) of a fixed scroll (44, 60) and the central end (96) of a wrap (46, 62) of a movable scroll (42, 58); and a connection path (106, 119, 112). When at least part of a connection hole (52, 72) gets blocked by the central end of the wrap of the movable scroll as the movable scroll moves in a circle, the connection path connects the first and second actuation chambers with the connection hole. When the central ends of the wraps of the fixed and movable scrolls abut against each other, the connection path cuts off the connection between the first and second actuation chambers and the connection hole.

Abstract: [Object of the Invention] An object of the present invention is to provide a power transmission device, wherein the vibration in the direction along the longitudinal axis of the rotating shaft 102 of the driven side piece of equipment transmitted from the external power source to the driving side rotating member 3 is not easily transmitted to the driven side rotating member 4. [Disclosure of the Invention] A power transmission device 1 comprises a driving side rotating member 3 driven by an external power source, a driven side rotating member 4 fixed to a rotating shaft 102 of a driven side piece of equipment 100, and a resiliently deformed plate spring 51 fixed to the driving side rotating member 3 at one end and detachably clamped by the driven side rotating member 4 and a clamping member 53 fixed to the driven side rotating member 4 at the other end. The plate spring is made of damping alloy.