Ntn Corporation

Tatsuo Kawase

Tetsuya Kurimura

Yasuhiro Yamamoto

Takashi Nozaki

Takahide Saito

Shigeaki Fukushima

Tomoaki Makino

Naoshi Hattori

Tatsuya Hayashi

Isao Komori

Makoto Yasui

Shiro Goto

Katsuo Shibahara

Satoshi Utsunomiya

Kiyotaka Kusunoki

Takeru Ito

A vertical axis wind turbine () includes a vertical rotation shaft () and a plurality of vertical blades () arranged around the rotation shaft and attached to the rotation shaft through an arm (). Each of the blades () includes a blade main part () and blade-tip inclined parts () extending from upper and lower ends of the blade main part () toward the rotation shaft (). Each of the blade-tip inclined parts () has a smaller thickness than a thickness of the blade main part (). A wind power generating device () includes a vertical axis wind turbine () having the above configuration and a generator ().

Vertical axis wind turbine, and wind power generating device and lighting facility comprising same

The present invention has an object of improving wear resistance of a thrust bearing portion. A pressure is generated by a dynamic pressure effect of a lubricating oil in a thrust bearing gap between a thrust bearing surface including dynamic pressure generating grooves and a smooth thrust receiving surface so as to rotatably support a shaft member in an axial direction. The thrust receiving surface is formed as a flat surface, whereas an inclined plane is provided on the thrust bearing surface so as to provide a reduced portion having a decreasing axial width in a radially outward direction in the thrust bearing gap.

Dynamic bearing device having a thrust bearing portion

An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.

Fluid lubricated bearing device

A power cut/connect device is proposed which is axially compact and is usable in a limited space. The device includes a first input member coupled to a power shaft, an output member mounted coaxially with the first input member, a first two-way clutch provided between the first input member and the output member, a second input member coaxially mounted with the output member, a second two-way clutch provided between the output member and the second input member so as to be disposed coaxially with and around the first two-way clutch, and a control unit for controlling the first and second two-way clutches for interruption and connection of power.

Power cut/connect device

An input-side rotary member 20, including an input gear 7, and an output-side rotary member 19, including a torque cam 1 fixedly mounted on an output shaft 12, are provided on the same axis of rotation. The input-side rotary member 20 is provided with an input cage 3 having a plurality of radially extending pockets 30 and balls 9 movably accommodated within the respective pockets 30. The torque cam 1 is provided with a generally annular cam groove 31 in which the balls 9 move rollingly, which groove 31 is of a shape having a distance from the axis of rotation that varies continuously. A presser member 2 is provided with a pressing face 2a by which the balls 9 are urged by a spring element 4. In this way, the input rotation of, for example, an engine can be reduced and then transmitted to a driven device such as an engine auxiliary equipment 102 with respect to the boundary set by a preset torque value.

Torque responsive rotation control device

Plating 5 having good slide friction characteristics is applied onto the pocket surfaces 4a1, 4a2, which are opposite each other in the circumferential direction of the pockets 4a of the carrier and onto the end face 4a3 in the axial direction. It is possible to improve the lubrication conditions at the contacting area of the outer circumferential surface of the planetary rollers and the pocket surface 4a1 of the carrier 4 by coating the plating 5 having good slide friction characteristics onto the pocket surfaces 4a1,4a2 of the pocket 4 of the carrier 4 and further onto the end face 4a3. That is, the friction force at the contacting area is able to be decreased by the plating 5 having good friction characteristics, whereby even in a case where the contacting area is lubricated with a little lubricant, thermal deterioration of the lubricant due to heat generation of the contacting area is suppressed and good lubrication actions can be expected.

Planetary roller type power transmission device

Friction type continuously variable transmission

A torque responsive rotation control device includes a torque limiting mechanism interposed between an input rotary member and an output shaft coaxial with the input rotary member. The torque limiting mechanism includes a torque cam engageable with the output shaft to rotate together therewith and movable axially relative to the output shaft and detachably engageable with the input rotary member in a direction of rotation thereof; and a plurality of springs for biasing the torque cam in a direction required for the torque cam to engage the input rotary member.

A frictional type continuously variable transmission having a continuously variable transmission unit with a planetary gear unit attached thereto to increase the speed ratio as a whole while not increasing the size of the entire device. This transmission is composed of the continuously variable transmission, a planetary gear unit and an impeller unit. The planetary gear unit has a drive shaft, a carrier fixed to the drive shaft, a plurality of planetary gears supported on the carrier, and an internal gear meshing with the planetary gears. The continuously variable transmission unit has an input shaft to which is fixed a sun gear meshing with the planetary gear. With this arrangement, the impeller can be rotated at a high speed even if the speed ratio of the continuously variable transmission unit is low. The transmission unit also has a pressing mechanism at the input shaft end. Thus, it is possible to manufacture the three units separately and assemble them together.

Growing community of inventors

Kuwana, Japan

Tatsuo Kawase