Ntn Corporation

Bridgestone Corporation

Kabushiki Kaisha Bridgestone

The School Corporation Kansai University

Hiroyuki Hakamata

Keisuke Sone

Takashi Nozaki

Yasuhiro Suzuki

Toru Takahashi

Koichi Okada

Shinji Miyazaki

Tatsuo Nakajima

Yusuke Shibuya

Katsumi Tashiro

Hiroshi Tani

Takuji Harano

Takayuki Oda

Ikuo Uemoto

Yoshihiko Hayama

Sota Yamaguchi

Yasuhiro Gotou

Masataka Azuma

A rolling bearing according to an embodiment includes a stationary ring having a first facing surface, a rotating ring having a second facing surface facing the first facing surface, and rotating relative to the stationary ring, rolling elements arranged between the first facing surface and the second facing surface, a cage that retains the rolling elements, first electrodes and second electrodes fixed in position relative to the stationary ring and arranged in a bearing space between the stationary ring and the rotating ring, third electrodes fixed in position relative to the rotating ring, position relative to the rolling elements, or position relative to the cage and arranged in the bearing space, and an insulating film formed on surfaces of the first electrodes and the second electrodes or surfaces of the third electrodes.

Rolling bearing and sensor-equipped rolling bearing

A magnetic encoder device () of the present invention includes a base portion () having a mounting surface () for mounting to a rotary shaft (), a cored bar () fitted and fixed over the base portion (), and a double-row magnetic encoder track () formed on the cored bar (). Through movement of each of magnetic poles of the magnetic encoder track () over a region opposed to a magnetic sensor (), an angle of the rotating rotary shaft is detected. The base portion () is formed of a sintered metal, and the mounting surface () is subjected to sizing.

Magnetic encoder device and rotation detection device

A shaft coupling includes plates fitted on ends of input and output shafts, respectively. A plurality of guide grooves are formed in the opposed surfaces of the plates, respectively, so that each of the grooves extends perpendicular to the corresponding groove formed in the other plate. A steel ball is disposed between each pair of guide grooves of the plates at a portion where the pair of grooves cross each other. When the steel balls are pushed by the driving plate, they push the driven plate while rolling in the guide grooves, with their movements restricted by a retainer in the radial direction of the plates. Thus, large power can be smoothly transmitted between the rotary members with less frictional resistance. The offset amount can be changed easily. Between the plates, there are only the steel balls and the retainer.

Shaft coupling

A rotating side case supporting the rotor of an in-wheel motor and a wheel or a hub are interconnected by a flexible coupling which comprises a motor-side plate and a wheel-side plate having a plurality of grooves and a plurality of grooves formed on their opposed surfaces in the circumferential direction at an angle of 45&#xb0; from the radial direction of the plates and extending in directions orthogonal to each other, respectively, small balls sandwiched between the grooves and in such a manner that they can slide, and an intermediate plate interposed between the above plates and having guide holes for guiding the small balls in a direction orthogonal to the radial direction of the plates and which has a small number of parts and is easily assembled.

In-wheel motor system

A system monitoring statuses such as presence and absence of abnormality and lifetime of a machine component such as, for example, a bearing having rolling elements, includes: a plurality of determining units respectively connected with a plurality of sensors, and a control unit connected with the determining units. Each sensor is disposed on the machine component of the associated rolling bearing to detect an influence signal resulting from passage of the rolling element induced in the machine component. Each determining unit determines, according a process set-up condition, the presence and absence of an abnormality and lifetime of the machine component associated with the sensor in reference to an output signal from the sensors. The control unit collects a result of determination performed by each determining unit. In this way, with a simplified structure, monitoring can be achieved at a low cost, precisely and efficiently.

Machine component monitoring, diagnosing and selling system

A ring magnet is attached to an outer ring by a magnet holding unit. A coil hold unit attached with a generator coil is provided at an inner ring to face the ring magnet. A substrate with a transmission circuit and a loop antenna is attached to the coil hold unit. Rotation of the inner ring causes the generator coil to generate power. The generated power is applied to the transmission circuit. A sensor output or the like is transmitted by the transmission circuit as a weak wave via the loop antenna to be received at the stationary side.

Bearing with noncontact signal transfer mechanism

Growing community of inventors

Iwata, Japan

Hiroyuki Hakamata