Fanuc Corporation

Shinobu Takano

Takafumi Kajiya

Yohei Arimatsu

Hisashi Maeda

Kenji Kawai

Kaname Matsumoto

Youhei Arimatsu

A rotor includes: a rotary member; a plurality of permanent magnets arranged on an outer circumferential side of the rotary member; and a cover tube provided on an outer circumferential surface side of the plurality of the permanent magnets, and formed by a tape-like fiber bundle in which a plurality of thread-like fibers aligned in one direction is bundled smoothly by resin, in which the cover tube is formed so that the tape-like fiber bundle circles in a spiral pattern along the circumferential direction, and the tape-like fiber bundle arranges along the axial direction, and a circling-start end face and a circling-end end face of the tape-like fiber bundle face the axial direction of the cover tube.

Rotor, rotating electrical machine and production method of cover tube

A stator includes: a substantially cylindrical core allowing arrangement of a winding inside the core; and a stator frame joined to the outer lateral surface of the core through a joint. The joint is formed at least at a part of a boundary where the outer lateral surface of the core and the inner lateral surface of the stator frame are in contact with each other. A material forming the core and a material forming the stator frame are mixed at the joint.

Rotary electric machine with a stator have a frame and a core with having their material mixed at joint

A rotor includes a rotary member, a plurality of permanent magnets disposed on an outer circumference of the rotary member, and a cover tube that is mounted to outer circumference of the permanent magnets to cover the permanent magnets, and is formed of a fiber reinforced plastic. At least one of the rotary member and the permanent magnets has a diameter enlarged portion having a diameter enlarged circumferential surface. The diameter enlarged portion has a diameter that enlarges from a first diameter region to a second diameter region. The first diameter region has a diameter equal to or less than an inner diameter of the cover tube. The second diameter region has a diameter equal to or more than an outer diameter of the permanent magnets.

Rotor, rotary electric machine, and manufacturing method of rotor

A rotor includes: a rotating member; a permanent magnet arranged in a plurality of rows along a circumferential direction of the rotating member and divided into a plurality of parts in a rotational axis direction X of the rotating member; and a cover tube divided into a plurality of parts in the rotational axis direction of the rotating member and covering an outer circumferential surface of the permanent magnet, the cover tube being formed of a fiber-reinforced plastic, wherein the plurality of permanent magnets in each row are arranged in an oblique direction with respect to the rotational axis direction of the rotating member, and the permanent magnets adjacent to the arrangement direction are disposed to be skewed in the circumferential direction, and at least one of the divided cover tubes covers an outer circumferential surface of one of the divided permanent magnets in the circumferential direction of the rotating member.

Rotor and rotating electrical machine

A rotor is configured such that the rotor includes: a rotary tube whose inner circumferential surface is tapered and which is fitted to a rotary shaft whose outer circumferential surface is tapered; a permanent magnet which is arranged on the outer circumferential side of the rotary tube; and a sheath tube which is fitted to the outer circumferential side of the permanent magnet so as to cover the permanent magnet, and that as the outside diameter of a multilayer member formed with the rotary tube and the permanent magnet is reduced so as to be tapered along an axial direction, the interference of the sheath tube for the multilayer member is increased so as to be tapered along the axial direction.

Rotor and rotary electrical machine

A rotor includes: a rotary member; a plurality of permanent magnets that are arranged on the outer circumferential side of the rotary member; and a cover tube that is provided on the side of an outer circumferential surface of the plurality of the permanent magnets and that is formed with a fiber bundle in which a plurality of fiber reinforced plastic filaments are arranged along a longitudinal direction, and the fiber bundle of the cover tube is spirally stacked in layers along a circumferential direction of the rotary member such that a part of the fiber bundle in a width direction is slackened.

Rotor

A rotor includes a rotary member; a plurality of permanent magnets disposed in an outer circumference of the rotary member; a holding member that is provided on an outer circumferential surface of the permanent magnets to hold the permanent magnets, the holding member having a cylindrical shape formed of a fiber reinforced plastic; and cover members that cover at least both end portions of a longitudinal direction D1 of the holding member.

Rotor and rotary electric machine

A rotor includes: a rotary member; permanent magnets in a plurality of columns which are arranged along the circumferential direction of the rotary member and each of which is divided into a plurality of permanent magnets in a rotary axis direction X of the rotary member; and a sheath tube which is fitted to the outer circumferential side of the permanent magnets, which covers the permanent magnets and which is formed of a fiber-reinforced plastic, and the sheath tube is divided, in the rotary axis direction X of the rotary member, by a division number which exceeds the division number of the permanent magnets.

A stator frame includes a flow path which is formed spirally from one end side to the other end side in the axial direction of the stator frame between an inner circumferential surface and an outer circumferential surface while circling along a circumferential direction of the stator frame and within which a coolant is circulated, where a side wall portion which isolates the adjacent parts of the flow path, an inner wall portion which isolates the flow path from the inner circumferential surface of the stator frame and an outer wall portion which isolates the flow path from the outer circumferential surface of the stator frame are integrally formed.

Stator frame, stator and rotary electrical machine

To provide a holding member, a rotor including the holding member, and a rotating electrical machine including the rotor, in which there is no risk of the holding member grinding against the stator, while maintaining a sufficient tensile force of the holding member for the magnet in the rotor of the rotating electrical machine. The length of the main section in the axial direction is longer than the length of the stator core in the axial direction; and the terminally processed section is arranged so as to be located outside of the end of the stator core in the axial direction; the terminally processed section is the start point and the end point of winding the fiber bundle composing the holding member, and is located outside of the stator core; and the terminally processed section is relatively thick.

Holding member, rotor of a rotating electrical machine comprising the same, and a rotating electrical machine comprising the rotor

A rotor according to the present invention includes a rotating axis rotating about an axial center of the rotating axis and a rotor component member including an inner circumferential surface on which an outer circumferential surface of the rotating axis fits. The outer circumferential surface of the rotating axis and the inner circumferential surface of the rotor component member include corresponding tapered surfaces each having a diameter that varies in taper along the axial center, the tapered surfaces being in full contact with each other while the outer circumferential surface of the rotating axis is press-fitted relative to the inner circumferential surface of the rotor component member, and at least one of the tapered surfaces has a corrugated surface structure storing a lubricant before the rotating axis is press-fitted relative to the rotor component member, while configured to wear away by press-fitting the rotating axis relative to the rotor component member to discharge the lubricant.

Rotor component member, rotating axis, rotor, motor, and machine tool

A stator of a rotary electric machine includes a stator core and coils. The stator core is provided with a plurality of slots extending in an axial direction and being spaced apart from one another in a circumferential direction. The coils are wound around through the slots. The coils include coil end portions which protrude outward in the axial direction from an end surface of the stator core. The stator includes a restricting member situated on an inner side of the coil end portions in the radial direction. The restricting member serves to prevent deformation of the coil end portions inward in the radial direction.

Stator of rotary electric machine including restricting member for preventing deformation of coil end portions and electric motor including such stator

In an electric motor, a rotary shafthas an outer circumferential surfacewith a diameter that decreases from a larger diameter sectionhaving a first diameter toward a smaller diameter sectionhaving a second diameter smaller than the first diameter. A sleeveis mounted by interference fit with an inner circumferential surfacewith a diameter that decrease from a front end adjoining the larger diameter sectiontoward a rear end adjoining the smaller diameter section, to the outer circumferential surfaceof the rotary shaft. With such a construction, the sleeveis fitted with the substantially entire surface of the inner circumferential surfaceto the outer circumferential surfaceof the rotary shaft

Growing community of inventors

Yamanashi, Japan

Shinobu Takano