Nsk-warner K.k.

Nsk-warner Kabushiki Kaisha

Masaki Sakai

Toshiaki Wakisaka

Tomoyuki Miyazaki

Shun Kitahara

Yosuke Ikeda

Manabu Sawayanagi

Takashi Kurita

Makoto Suzuki

Yoshihisa Harada

Hideki Tatewaki

Takayuki Watanabe

Hirotsugu Suzuki

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 one-way clutch includes an outer race, an inner race which is spaced from the outer race in an inside diameter direction and arranged concentrically so as to be relatively rotatable, a plurality of engaging members which are arranged between the outer race and the inner race to transmit a torque, and a cage which retains the engaging members. The one-way clutch is provided with volute springs which urge the engaging members in the direction in which the engaging members engage with a cam face of the outer race or the inner race.

One-way clutch

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

A double-wrap band brake apparatus has a double-wrap brake band comprising an annular intermediate band a pair of annular outer bands. The brake apparatus is used to brake a rotating member fitted in the double-wrap brake band. A center deviation correcting member is provided for correcting a center deviation between the intermediate band and the outer bands.

Double-wrap brake band apparatus

A double-wrap band brake apparatus which has a double-wrap brake band comprising an annular intermediate band with a frictional surface formed on the inner periphery thereof, a pair of annular outer bands secured to the free end of the intermediate band in a state that the respective free ends of the outer bands oppose to each other and have frictional surfaces respectively formed on the inner peripheries thereof, an anchor bracket secured to the operating ends of the outer bands to be latched on the side of a main body casing, and an apply bracket secured to the operating end of the intermediate band for receiving a force in a direction in which the intermediate band and the outer bands are constricted from an actuator. The brake apparatus is used to brake a rotating member fitted in the double-wrap brake band. A center deviation correcting member for correcting a center deviation between the intermediate band and the outer bands is formed on at least one of the anchor bracket and the apply bracket.

The present invention provides a wet type multi-plate friction engaging apparatus in which axially shiftable outer tooth plates provided on an inner peripheral surface of a drum, and inner tooth plates disposed within the drum and spline-connected to an outer peripheral surface of a hub having lubricating oil supply holes open to the outer surface of the hub are arranged coaxially and alternately, so that the outer tooth plates and the inner tooth plates can be frictionally engaged with each other between a piston disposed at a closed end of the drum and a flange disposed at an open end of the drum by an urging force of the piston, and wherein the drum is not rotated or rotated at a low speed, and friction material are adhered to only the outer tooth plates or the outer tooth plates and the flange.

Wet type multi-plate friction engaging apparatus

A brake band formed by pressing a smooth hot plate or hot drum heated to a temperature of 350 to 550&deg; C. on a surface of the frictional material made of a fiber component, a filler, a friction adjustment agent and a thermosetting resin on a strap for 1 to 5 seconds before or after the frictional material is fixed.

Brake band having an improved initial friction coefficient

In a friction plate formed by adhering a plurality of friction material segments having connecting portions to be interconnected to each other onto a core plate, a frictional engagement surface side portion of each connecting portion between the friction material segments is formed as a recessed portion.

Friction plate

A wet frictional engagement plate comprising a core metal having a surface and a wet frictional material containing a fiber component, a filler, a friction adjustment agent and a thermosetting resin, the wet frictional material being fixed onto a surface of the core metal. Before or after the wet frictional material is fixed onto the surface of the core metal, the surface of the wet frictional material is subjected to a surface treatment process comprising pressing a smooth-faced hot plate of a temperature in a range of from 350.degree. C. to 550.degree. C., which temperature is selected so that it does not carbonize the thermosetting resin, against the surface of the wet frictional material for a time in a range of from 1 to 5 seconds. The wet frictional engagement plate has a friction coefficient which does not change and remains stable from initial use, and also has a long endurance life.

Growing community of inventors

Fukuroi, Japan

Masaki Sakai