Kawasaki, Japan
Kawasaki, Japan

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Patent
KYB Corporation | Date: 2016-11-23

A power steering device (100) includes a worm shaft (2) configured to rotate as an electric motor (7) is driven; a worm wheel (1) meshed with the worm shaft (2), the worm wheel (1) being configured to transmit a rotational force of the electric motor (7) to a rack shaft configured to turn wheels; a bearing that rotatably supports a tip side of the worm shaft (2); a gear case (3) that houses the worm shaft (2); a biasing member configured to bias the worm shaft toward the worm wheel via the bearing; and a holder (30) including a housing hole configured to house the bearing movably in a biasing direction of the biasing member. The holder (30) includes a plurality of bulging parts (33e) formed to bulge radially outwardly, the bulging parts being configured to come into contact with an inner peripheral surface of the gear case (3).


Patent
KYB Corporation | Date: 2016-12-14

An electric power steering device for driving an electric motor 10 using an assist command value calculated on the basis of a detection result of a torque sensor 12 for detecting a steering torque to reduce a left/right difference of a remaining steering angle of a steering wheel, the electric power steering device including a basic return command value calculation unit 20 configured to calculate a basic return command value in a direction to return the steering wheel to a neutral position on the basis of a steering angle of the steering wheel, a turn/return determination unit 40 configured to determine the turn and the return of the steering wheel, a gradually changing return command value calculation unit 41 configured to calculate a gradually changing return command value, the gradually changing return command value gradually increasing, while the return of the steering wheel is determined by the turn/return determination unit, and a return command value calculation unit 50 configured to calculate a return command value by adding the gradually changing return command value to the basic return command value. The electric motor is driven by adding the return command value to the assist command value.


Patent
KYB Corporation | Date: 2016-04-20

Providing an anode capable of desirably performing plating for a long period of time. An anode (10) is cylindrical and forms a space between an article (1) to be plated and itself. A plating solution flows in the space. Positive voltage is applied to the anode. The anode (10) includes an outer cylinder (11) and an inner cylinder (12) welded to be in contact with an inner surface of the outer cylinder (11). The inner cylinder (12) is formed of a plate material (12A) made from platinum.


Patent
KYB Corporation | Date: 2016-06-01

A control valve includes a seat portion through which the fluid passes, a poppet which has a valve body portion and is configured to move relative to the seat portion, and a poppet throttle passage defined between the seat portion and the valve body portion. The poppet throttle passage is formed to gradually increase a flow passage area in a horizontal cross-section perpendicular to center axes of the seat portion and the valve body portion from an upstream side to a downstream side.


Patent
KYB Corporation | Date: 2016-11-23

A relief valve includes: a case; a valve seat provided in a channel; a poppet valve that opens and closes the channel by being seated on and separated from the valve seat; a spring that biases, at a first end, the poppet valve in a direction in which the poppet valve is seated on the valve seat; an adjusting screw that is threaded into the case and changes, in accordance with a threaded depth, a distance between the valve seat and a bearing surface, which is in contact with a second end of the spring; and a positioning plate that has an engaging hole with which a projected portion of the adjusting screw is engaged such that relative rotation is not allowed and that restricts rotation of the adjusting screw by being fixed to an end surface of the case and by being brought into contact with the adjusting screw only at a side surface of the projected portion.


Patent
KYB Corporation | Date: 2016-10-05

A fluid pressure cylinder includes the piston rod having a first tapered portion formed on an outer circumference of the piston rod so as to be inclined with respect to a center axis; a cushion bearing that is provided around the outer circumference of the piston rod; a bearing receiving portion that allows insertion of the cushion bearing; and a cushion passage that is formed between the cushion bearing and the bearing receiving portion when the cushion bearing is inserted into inside of the bearing receiving portion at the vicinity of the stroke end and that imparts resistance to flow of working fluid passing through the cushion passage. The cushion bearing has a contacting portion capable of coming into contacting with the first tapered portion, and the contacting portion is positioned with respect to the piston rod by being brought into contact with the first tapered portion.


Patent
Kyb Corporation and Fuji Heavy Industries | Date: 2016-04-20

An electric power steering device includes a basic return command value calculation unit configured to calculate a basic return command value in a direction returning the steering wheel to a neutral position, on the basis of detection results of a steering angle detector detecting a steering angle of the steering wheel, a first correction gain calculation unit configured to calculate a first correction gain correcting the basic return command value, on the basis of detection results of a vehicle speed detector detecting vehicle speed, and a second correction gain calculation unit configured to calculate a second correction gain correcting the basic return command value, on the basis of a change amount of the steering torque detected by the torque sensor. The basic return command value is corrected by the first and second correction gains so as to calculate a return command value. The return command value is added to the assist command value so as to drive the electric motor.


Patent
KYB Corporation and KYB YS Co. | Date: 2016-07-20

Providing a damper which can prevent leak of the fluid filling a cylinder and can maintain a proper reaction force and damping characteristic. A damper includes a piston (20) reciprocally movable in a cylinder (10) thereby dividing an interior of the cylinder (10) into a first chamber (A) located at an open end (11) side and a second chamber (B) located at a closed end (12) side, a piston rod (30) having a distal end (31) to which the piston (20) is connected and a rear end (33) side protruding outward from the open end (11) of the cylinder (10), a rod guide (40) fixed to the open end (11) of the cylinder (10) and having a through hole (44) through which the piston rod (30) is reciprocally movable, and a seal (49) which is provided in the rod guide (40) so as to be located at a position spaced away from an outer end (Z) of a sliding surface (47) of the through hole (44) to the first chamber (A) side by a distance longer than a maximum stroke width (S) of the piston rod (30).


Patent
KYB Corporation | Date: 2016-07-27

A shock absorber includes at least one of an expansion-side sensitive unit and a contraction-side sensitive unit. The expansion-side sensitive unit has an expansion-side actuating chamber (E) that communicates with an expansion-side chamber and a contraction-side chamber, an expansion-side free piston (15) that partitions the expansion-side actuating chamber into a first expansion-side pressure chamber (E1) and a second expansion-side pressure chamber (E2), and an expansion-side spring element (16) configured to bias the expansion-side free piston to compress the first expansion-side pressure chamber. The contraction-side sensitive unit has a contraction-side actuating chamber that communicates with a contraction-side chamber and a reservoir (R), a contraction-side free piston (24) that partitions the contraction-side actuating chamber into a first contraction-side pressure chamber and a second contraction-side pressure chamber, and a contraction-side spring element (25) configured to bias the contraction-side free piston to compress the first contraction-side pressure chamber.


Patent
KYB Corporation | Date: 2016-01-27

A shock absorber includes a suction passage (3) configured to permit only a flow from a reservoir (R) toward a compression-side chamber (R2), a rectification passage (4) configured to permit only a flow from the compression-side chamber (R2) toward a extension-side chamber (R1), and a variable valve (V) configured to permit only a flow from the extension-side chamber (R1) toward the reservoir (R). A large chamber (16) serving as a compression-side pressure chamber that communicates with the compression-side chamber (R2) and an outer periphery chamber (17) serving as a extension-side pressure chamber that communicates with the extension-side chamber (R1) are partitioned in the shock absorber by a free piston (5) that moves slidably within a bottom member (11) serving as a housing. A compression-side pressure-receiving area (A1) of the free piston (5) is larger than an extension-side pressure-receiving area (B1). Therefore, even in the uniflow shock absorber in which the extension-side chamber (R1) and the compression-side chamber (R2) are at equal pressures during the contraction operation, the damping force is reduced under conditions in which high frequency is input since the free piston (5) moves downward.

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