Denso Corporation

Other

Desno Corporation

Yoshiki Tada

Michiyasu Nosaka

Yasuo Tabuchi

Motohiko Ueda

Takayuki Suzuki

Mitsuhiro Tanabe

Hiroshi Nagae

Masahiro Yamashita

Shigeki Iwanami

Keiji Ishikawa

Kouji Kida

Takushi Kamiya

Takayuki Hirose

Kouji Matsunaga

Masaharu Sakai

Yasushi Mitsuishi

Yukio Ogawa

In an electromagnetic clutch, a rotor includes a cover portion that covers a radially outer end of an armature from a radially outer side. The cover portion, the radially outer end of the armature, and a wall of the rotor define a discharge passage that is formed into a ring shape centered on a rotating shaft and is open on a first end side in an axis line direction for discharging abrasion powder generated by friction between walls. The cover portion includes a tapered surface that is shaped such that an area in a cross sectional plane of the discharge passage which is orthogonal to an axis of the rotating shaft becomes larger toward the first end side in the axis line direction.

Friction clutch

A power transmission device includes a pulleyand a hubhaving an inner hub, a rubber damperand an outer hub. A hub side engagement portionformed of an elastic material and arranged at either one, or both, of an inner peripheral surface and an outer peripheral surface of the outer hub engages with a pulley side engagement portion, which is arranged at a position corresponding to the outer hub, of the pulley in a concavo-convex fitting to thereby constitute a torque transmission structure between the hub and the pulley. The hub side engagement portion and the pulley side engagement portion have a concavo-convex outer shape and mesh with each other. A ring-like dust invasion prevention portioncovers a front surface of said concavo-convex fitting.

Power transmission device

A hub for use in a power transmission apparatus comprises cylindrical portionand outer ringincluding a plurality of tongue-like reinforcing portionseach protruded radially inward from the peripheral end of the corresponding one of the plurality of protrusions. When the distance from point C where the rear-side end surface of the cylindrical portionand hub-side engaging portionare connected with each other, to rear-side end surface D of reinforcing portionsis given a, and the distance from rear-side end surface D of reinforcing portionsto radially innermost front-side portion E is given b, distance b is less than one half of distance a.

Hub for power transmission apparatus

A power transmission device includes a pulleyand a hubhaving an inner hub, a rubber damperand an outer hub. A hub side engagement portionformed of an elastic material and arranged either one, or both, of inner peripheral surface and outer peripheral surface of the outer hub engages with a pulley side engagement portion, arranged at a position corresponding to the outer hub, of the pulley in concavo-convex fitting to thereby constitute a torque transmission structure between the hub and the pulley. The hub side engagement portion and the pulley side engagement portion have a concavo-convex outer shape and mesh with each other.

A power transmission apparatus includes a pulleyhaving a belt attached thereto to transmit the rotating drive force, a hubwhich connects the pulley to a rotating shaft of a driven device, a bearingwhich rotatably supports the pulley, and a sleeve ringwhich is fitted and secured to the pulley and attaches the bearing to the pulley to prevent it relatively moving. The sleeve ring is provided, on its first end opposite to the driven device, with a bent portionagainst which the bearing abuts to restrict further movement of the bearing. An annular retaineris provided on the portion of the bearing adjacent to the drive device. The bearing is secured to the sleeve ring through the annular retainer by calking a second endof the sleeve ring opposite to the first end. The sleeve ring is provided with a projectionwhich projects in the axial direction from the rear surface of the pulley and a casingis provided with an annular groovewhich at least partly receives therein the projection.

Power transmission apparatus

A power transmission system including an integrally molded hub and elastic member, where stress is inhibited from concentrating at the gate marks remaining after integral molding. In a pulley driven by a belt, a plastic pulley side relief sectionprovided at a pocket section of the pulley and a plastic hub side relief section provided on an iron outer ring of the hub engaged at the pocket section whereby power is transmitted from the pulley to the shaft. The hub side relief section and outer ring forming parts of the hub, the iron inner hub to be fastened to the shaft, and the plastic cylindrical part are integrally molded so that the gate mark for plastic injection is formed near to or further to the outer circumference of the outer ring.

Power transmission system

A power transmission device includes: a pulleyrotatably attached to a casing; a hubconnected to the pulleyby an engagement of protrusions with recesses; and a power shutoff memberinterposed between the huband a rotary shaft. The power shutoff member and the rotary shaftare joined to each other by means of screwing. When a water intrusion path formed between a hub side seating face of the hub and a shaft side seating faceof the rotary shaft is formed into a labyrinth structure, water is prevented from entering the seating face. An engagement portionon the power shutoff member side is engaged with a hub side engagement portionso that it can be accommodated in the hub side engagement portion, and the power shutoff member can be rotated together when the hub is rotated. An engagement gap formed between a power shutoff member side engagement portion and a hub side engagement portion in the radial direction perpendicular to an axis of the rotary shaft is in a range from 0.001 mm to 15% of a diameter of a circumscribed circle of the power shutoff member side engagement portion.

A bearing according to the present invention includes a cylindrical member formed on and around an outer member of a usual bearing. To firmly connect the cylindrical member to the outer member, grooves having an inclination relative to the axial direction of the bearing are formed so that the grooves do not cross one another on the outer surface of the outer member. The cylindrical member is made of a resin material by molding, and the resin, which is melted by heat in the molding process, enters into and adheres to the grooves. In this manner, the cylindrical member is firmly connected to the outer member so that movement in both of the rotational and axial directions of the bearing is prevented. The grooves formed on the outer surface of the outer member may be grouped, and their inclination relative to the axial direction may be alternately reversed group by group.

Bearing having cylindrical member connected to outer member of bearing

A power transmission device () comprises a rotatable rotary part () to which a rotational drive force is transmitted from a drive source and a power transmission shut-off member () that shuts off transmission of an excessive torque between the rotary part and a rotating shaft () of a device to be driven. The power transmission shut-off member is threadedly coupled to the rotating shaft and can rotate with the rotating shaft. The rotary part is installed so as to be sandwiched between the power transmission shut-off member and the rotating shaft. A disc spring (), installed between the power transmission shut-off member and the rotary part, is further provided. A caulked part () for preventing a part of the power transmission shut-off member from dropping is provided on the front end side of the rotating shaft.

A power transmission apparatus () includes a rotary portion () to which turning driving force from a driving source is transmitted and which can rotate, a power cutoff member () mechanically connected to the rotary portion () and one of the ends of a rotary shaft () of a driven apparatus and cutting off transmission of excessive torque between them, and a cap () connected to the end of the rotary shaft () on one hand and fastened by screw meshing to the power cutoff member () on the other hand, and transmitting power from the power cutoff member () to the rotary shaft (). The rotary portion (), the power cutoff member (), the cap () and the rotary shaft () all rotate integrally with one another. The cap () has a flange portion () protruding in a radial direction with respect to an axis of the rotary shaft () and supporting an axial force.

In the power transmission device having a torque limiting function for shutting off the transmission of an excessively high torque between the pulleyand the rotary shaft, the huband the rotary shaftare connected to each other by means of screw engagement between the female screw portion, which is formed on the inner circumferential face of the hub, and the male screw portionwhich is formed on the outer circumferential face of the forward end portionof the rotary shaft, and the seal meansfor sealing between the hub and the rotary shaft is provided adjacent to the front face or the front and rear faces of the screw engaging portion. The torque limiting function may be provided on the rotary shaft side or the hub side.

A controlled compressor apparatus enables a hybrid compressor in an idle-stopping vehicle to operate more efficiently when driven by a motor alone. The controlled compressor apparatus includes a compressor , included in a refrigeration circuit , of a variable volume type for compressing a refrigerant; a motor powered by a battery to operate; and a controller for selecting the driving force provided either by the engine or the motor to drive the compressor and control its discharge volume. The controller causes the motor to operate the compressor such that the compressor is turned on or off at a discharge volume of the compressor that larger within a variable range than that required for operating the refrigeration circuit

Hybrid compressor

A centrifugal ventilator fan, which has improved fan performance and lower noise. A first outlet angle, on an upstream end of the fan, is less than a second outlet angle. Additionally, the first outlet angle is equal to zero degrees or greater and five degrees or less, while the second outlet angle is equal to thirty degrees or greater and forty five degrees or less. Furthermore, a first inlet angle, on an upstream end, is greater than a second inlet angle, on the opposite end. The first inlet angle is equal to sixty-five degrees or greater and ninety degrees or less, and the second inlet angle is equal to fifty-five degrees or more and seventy-five degrees or less.

Centrifugal ventilator fan

A controlled compressor apparatus for idle-stopping vehicles that permits precise variable displacement control of a compressor and reduces power consumption when the compressor is motor-driven. The apparatus includes a battery-powered motor and a control unit for selecting the engine or the motor to drive the compressor and for controlling the displacement of the compressor. A current detector detects the magnitude of a current supplied to the motor. The control unit stores a relationship between the displacement and the current and controls the displacement based on the current detected by the current detector.

Growing community of inventors

Okazaki, Japan

Yoshiki Tada