Nsk-Warner K.k.

Toyota Jidosha Kabushiki Kaisha

Tokyo University of Agriculture and Technology

Nsk-Warner Kabushiki Kaisha

Tomoyuki Miyazaki

Shun Kitahara

Masahiro Kobayashi

Yosuke Ikeda

Kiyokazu Ichikawa

Manabu Sawayanagi

Yoshio Kinoshita

Shigeki Umezawa

Shinichi Natsumeda

Ritsuo Toya

Tatsuro Miyoshi

Masaki Sakai

Hiroyuki Kinpara

Tamotsu Fujii

Shiro Takeuchi

Shigeharu Nishimura

Xiaoming Gu

Fumimasa Muramatsu

Kenji Maruo

Hideki Oki

Masato Kobayashi

Shouji Yatsuyanagi

Yuji Iwase

Koichi Kato

Michitaka Tsuchida

Shotaro Kato

Tsuyoshi Hirayanagi

Yota Mizuno

Takaya Yamada

Michinobu Suzuki

Hiroyuki Ohishi

Kazuyuki Fujita

Takayuki Watanabe

Hirotsugu Suzuki

Masao Eguchi

Takashi Shibamiya

Hiroaki Matsushima

Masahiro Kobyashi

Since one end of a spring is received by a planar portion of a spring seat provided on any one of an outer plate and an inner plate, it is possible to support the spring with a planar member without machining a bottom wall face of the outer plate into a planar shape. Since the spring seat has seat guide portions that contact the outer plate, it is possible to suppress the fluctuation of the spring seat and the fluctuation of the spring by the seat guide portions, so it is possible to reliably prevent interference of the spring with its peripheral portion. Therefore, a load on the spring is reduced, so it is possible to improve the durability of a one-way clutch.

One-way clutch

A friction plate is formed in such a manner that a plurality of friction material segments fixed to an annular core plate, wherein a passage extends through from an inner diameter side to an outer diameter side and is defined between the plurality of friction material segments, and a forming portion for retaining air is provided on a bottom surface of the passage.

Friction plate and wet multiple-plate clutch with friction plate

A friction plate is formed by annularly fixing a plurality of friction material segments to a substantially annular core plate, and a minute groove is formed on a surface of the friction material segment.

Friction plate and wet-type multiple-disc clutch with friction plate

The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and the outer peripheral edge.

Friction plate and wet-type multi-plate clutch having such friction plate

The present invention provides a starting clutch disposed between a transmission and an engine and having a wet type multi-plate clutch for transmitting a power, in which the wet type multi-plate clutch includes a plurality of friction plates housed for an axial sliding movement, a clutch drum for housing the friction plates, and a piston for urging a radial central region or therearound of the friction plate to engage the friction plates, and oil which has lubricated the wet type multi-plate clutch is temporarily trapped within the clutch drum and then is discharged.

Starting clutch

A novel contact area measuring apparatus is provided. The contact area measuring apparatus includes a light transmissive substratein contact with a specimen, illumination means for illuminating the light transmissive substratewith white light from the opposite side of the light transmissive substrateto the specimen, interference image acquisition meansfor acquiring an interference image produced by the light reflected off the specimenand the light reflected off the light transmissive substrate, intensity histogram creation means for creating an intensity histogram from information on the intensity of the interference image, and contact area computation means for calculating a contact area from the intensity histogram. The interference image acquisition meansacquires an interference image and information on the intensity of the interference image. The intensity histogram creation means forms separate RGB intensity information from the information on the intensity of the interference image and creates a G-intensity histogram. The contact area computation means separates the intensity histogram into a plurality of normal distributions by using optimized approximation of complex normal distribution and calculates the contact area from the lowest-intensity normal distribution.

Contact area measurement device and method for measuring contact area

The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge.

A lubrication controlling method for a starting clutch including a wet type multi-plate clutch disposed between a transmission and an engine of a vehicle and adapted to transmit a power, the method including always supplying lubricant oil during an operation of the wet type multi-plate clutch, continuously changing a flow amount of the lubricant oil in accordance with a condition of the wet type multi-plate clutch, and controlling the amount of the lubricant oil so that a supplied amount of the lubricant oil during an idle rotation of the wet type multi-plate clutch is greater than a supplied amount of the lubricant oil during the complete engagement of the wet type multi-plate clutch.

Lubrication controlling method for starting clutch

The present invention provides a wet-type multi-plate friction engaging apparatus comprising a clutch portion including internally toothed plates and a piston adapted to apply an urging force for engaging the internally toothed plates and wherein load acting portions acting on the clutch portion are arranged on both sides of the clutch portion, and a contact area of the load acting portion through which the load acting portion is contacted with the clutch portion is located in a predetermined range between about 20% of a radial width of a friction engaging portion from a central position of the friction engaging portion in an outer diameter direction and about 20% of the radial width of the friction engaging portion in an inner diameter direction, and a radial width of the contact area is smaller than about 10% of the radial width of the friction engaging portion.

Wet-type multi-plate friction engaging apparatus

A multiple disc clutch apparatus in which driven plates and drive plates are arranged alternately to overlap with each other and which is arranged to be engaged or released in response to an action mode or a non-action mode switched over by the pressing force of a piston, comprises piston regulation means which regulates an amount of movement of the piston so that metallic plates forming the substrates of the driven plates and the drive plates do not adhere to each other.

Multiple disc clutch apparatus

The present invention provides a friction plate having a friction surface formed by adhering a friction material to a substantially annular core plate and wherein the friction surface is provided with an oil passage communicated with inner and outer peripheral edges of the friction plate, a first oil groove having an opening portion opened to the inner peripheral edge of the friction plate and an end portion terminating at a position between the inner and outer peripheral edges, and a second first oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end portion terminating at a position between the inner and outer peripheral edges.

Friction plate and wet-type multi-plate clutch

A method of manufacturing a clutch housing which accommodates therein a plurality of clutch plates adapted to be engaged together so as to transmit a torque, wherein a drum portion and a boss portion can be integrally formed from a plate material so as to form a thick portion having a thickness of not less than approximately 1.3 times as large as that of the plate material and a thin portion having a thickness of not greater than approximately &#xbd; of that of the plate material.

Clutch housing

A friction plate for a wet-type multiplate clutch provided with a core plate and friction linings fixed on opposite sides of the core plate, respectively. Each of the friction linings is formed such that at a section thereof located on a side radially inner than a radial center line thereof, the friction lining has a thickness that gradually increases from an inner circumferential portion of the section toward an outer circumferential portion of the section.

Friction plate for wet-type multiplate clutch

A clutch hub provided with a side wall at an end of a cylindrical portion. The cylindrical portion is formed to have convexed and concaved portions to serve as a spline and an oil passage is formed on a tooth of the spline. An oil dam is formed by plastic deformation on the inner peripheral surface of the tooth of the spline with the oil passage formed thereon at a position separated from an open end by a predetermined distance, concaved grooves are formed on the outer peripheral surface of the spline with the oil dam formed thereon.

Growing community of inventors

Fukuroi, Japan

Tomoyuki Miyazaki