Abstract: The present invention aims at providing a cam clutch that realizes a reduction in production cost, improves productivity and assemblability, and increases the degree of design freedom. The cam clutch includes: an inner race and an outer race that are coaxial and rotatable relative to each other; a plurality of cams circumferentially arranged between the inner race and the outer race; and positioning members that keep each two adjacent cams at fixed positions relative to each other. The positioning members are configured to link each two adjacent cams such as to be tiltable independently of each other.

Abstract: An object of the invention is to provide a positive clutch that has a high rigidity and simple structure, and offers potential to allow easy adjustment of torque limit load, suppress friction loss and noise generation, realize a size reduction, and extend the service life. This positive clutch is configured to prohibit relative rotation of an outer and inner races by circumferentially holding each of a plurality of rollers between an outer race slope portion and an inner race slope portion. The clutch includes a torque limiter mechanism, which includes a piston member having a flat portion that forms the outer or inner race slope portion, and a resilient member that applies a constant load on the piston member. The piston member is slidably accommodated in a piston member accommodating hole formed in the outer race or the inner race.

Abstract: To provide a high-strength silent chain and a chain drive system. The silent chain is made up of a plurality of link plates pivotably coupled together with connecting pins. The plurality of link plates include two or more types of link plates having different shapes. The link plates of different shapes are designed to have pitch lines at the same height when the link plates sit on a sprocket. The chain drive system includes this silent chain.

Abstract: To provide a versatile and easy-to-produce link plate that can mitigate the rise in surface pressure on guide members even when the link plate is slightly tilted, to minimize adverse effects of wear marks and wear particles, and a chain. The link plate has a sliding end face, with end face rounded portions at both ends in a direction of plate thickness, formed to be continuous with both side faces of the link plate. The link plate is shaped to satisfy 16.8?((r*2/t2)+(t?r*2))/r?11.5, where r represents a minimum radius of curvature of the end face rounded portions and “t” represents the plate thickness of the link plate.

Abstract: An object of the present invention is to provide a vehicle parking lock system that realizes a parking lock with a positive user perception, and enables energy and cost reductions without complex control and with a simple configuration. The object is achieved by a selectable clutch configured to be switchable between four operating modes and provided to one of an input shaft, an output shaft, and an intermediate shaft of a transmission. The operating mode of the selectable clutch is controlled based on detection signals of a plurality of sensors to prevent an unintended movement of the vehicle when the vehicle is stationary.

Abstract: An object of the present invention is to provide a selectable clutch that enables an improvement in the performance of maintaining orientations of cams, and allows simplification of the structure of biasing means, as well as reduction of the thrust required for the switching of operating modes. The object is achieved by a plurality of cams circumferentially held by a cage ring between an inner race and an outer race, and biased in an engaging direction by a biasing means. The cams are each configured to have the center of gravity located such that each of the cams functions as an engaging type cam when oriented in engagement with the inner race and the outer race, and such that each of the cams functions as a disengaging type cam in a tilted freewheel orientation not to contact with the inner race or the outer race.

Abstract: To provide a simple-structured cam clutch capable of preventing unwanted jamming of cams, thereby enabling smooth operation including switching operation between operation modes, and offering potential for higher functionality and size reduction. The plurality of cams of the cam clutch include first cams and second cams having different engaging directions. The cam clutch includes an operation mode switching mechanism for switching operation modes, and a switch actuating mechanism. The operation mode switching mechanism includes an outer cage ring, an inner cage ring, and a position-restricting cage ring. The switch actuating mechanism includes an outer guide, an inner guide, and a rotation ring circumferentially movable relative to the outer guide and inner guide and provided for controlling the axial positions of the outer cage ring and inner cage ring.

Abstract: An object of the present invention is to provide a silent chain drive device that can minimize loss of strength and wear of link plates, as well as prevent the chain from lifting up to achieve better power transmission efficiency. The silent chain drive device includes a silent chain designed for inside flank meshing/inside flank seating, and a sprocket with sprocket teeth. The plurality of link plates in the silent chain, which each have a pair of teeth, are configured to make contact with the sprocket teeth only at the inside flanks of each pair of teeth when the silent chain wraps around the sprocket and meshes with all of the sprocket teeth.

Abstract: A flat transmission device includes a belt-shaped unit and a clamp device. The clamp device includes a main clamp member that covers a part of an end of the belt-shaped unit in the width direction including a side edge of the belt-shaped unit on a first side in the width direction, and an auxiliary clamp member that covers a part of the end of the belt-shaped unit in the width direction including a side edge of the belt-shaped unit on a second side in the width direction. The main clamp member and the auxiliary clamp member move relative to each other while partially overlapping with each other in the width direction, thereby cooperatively entirely covering the end of the belt-shaped unit in the width direction.

Abstract: An object of the present invention is to provide a tensioner with a simple structure that effectively maintains the oil pressure inside an oil pressure chamber at a correct level, while also making the machining and assembling processes less demanding. The tensioner includes a relief mechanism, which includes an orifice member that has an oil passage designed to form an orifice structure. The orifice member has a flat circular end wall part and a circumferential wall part that extends rearwards from the peripheral edge of the end wall part. The circumferential wall part includes a bulged portion that extends rearwards and is curved radially outwards. The bulged portion is designed such that the diameter of the circumscribed circle of the orifice member is greater than the inside diameter of the plunger as viewed in plan from an axial direction before the orifice member is press-fit into the plunger.

Abstract: An object of the present invention is to provide a cam and a one-way cam clutch that realize a reduction in weight and production cost, provide more design freedom in setting the center of gravity of the cam, and achieve high responsiveness. The above object is achieved by a cam configured to make contact with an inner race and an outer race by a rotational moment applied in an engaged direction by an annular spring, in which a plurality of cam plates having an identical outer contour and arranged in parallel along a direction of the pivot axis are coupled together and united by a connecting pin extending in the direction of the pivot axis, and the annular spring is configured to be mountable between adjacent cam plates and/or on an outer side of the plurality of cam plates in the direction of the pivot axis.

Abstract: An object of the present invention is to provide a sprocket that mitigates the impact of tension fluctuations resulting from load torque changes, suppresses noise and vibration, ensures stable chain behavior, prevents sprocket durability loss and the generation of harmonics during rotation, along with a chain drive system. Tooth roots between adjacent teeth of the sprocket include those with a radial deviation from a root circle of a standard tooth profile, set within a predetermined numerical range corresponding to a tooth pitch. A phase variation pattern is created by changing a root radius in accordance with an angular position. The phase variation pattern has a waveform with an amplitude varied within a range of (1/7)Amax, where Amax represents a maximum amplitude. The chain drive system includes a plurality of sprockets and a chain passed over the sprockets, at least one of them being the above-described sprocket.

Abstract: An object of the present invention is to provide a cam and a one-way cam clutch that realize a reduction in weight and production cost, provide more design freedom in setting the center of gravity of the cam, and achieve high responsiveness. The above object is achieved by a cam configured to make contact with an inner race and an outer race by a rotational moment applied in an engaged direction by an annular spring, in which a plurality of cam plates having an identical outer contour and arranged in parallel along a direction of the pivot axis are coupled together and united by a connecting pin extending in the direction of the pivot axis, and the annular spring is configured to be mountable between adjacent cam plates and/or on an outer side of the plurality of cam plates in the direction of the pivot axis.

Abstract: A cam clutch unit which can receive an axial load in a small space without increasing rigidity of a cage ring or disposing another member is provided. The cam clutch unit includes a plurality of cams 130 and a plurality of rollers 140 disposed so as to be aligned in a circumferential direction between an inner ring and an outer ring, a cage ring 150 having a plurality of pocket portions 151, 152 which regulate relative movement in a circumferential direction of the cam 130 and the roller 140, and an annular spring 160 which urges the cam 130, in which the roller 140 has a part protruding in an axial direction more than the cage ring 150 when being held by the cage ring 150.

Abstract: A cam clutch unit includes a plurality of cams and a plurality of rollers disposed so as to be aligned in a circumferential direction between an inner ring and an outer ring, a cage ring having a plurality of pocket portions which regulate relative movement in a circumferential direction of the cam and the roller, and an annular spring which urges the cam, in which the cam has an engagement stepped portion capable of engagement with the spring, the cage ring has an end-part circumferential annular portion continuing in the circumferential direction on an end surface in the axial direction, the pocket portion regulates movement of the roller to the outer ring side and the inner ring side and has a claw portion capable of insertion of the roller from the outer ring side or the inner ring side by elastic deformation.

Abstract: To provide a rotating member and a forming method thereof that allow formation of protrusions biting into an opposite surface to achieve high slip torque with a simple configuration. The rotating member includes a boss part and an anti-slip surface at least on one of both axial end faces of the boss part. The anti-slip surface has a plurality of corrugated rib parts, which includes a main groove and at least one auxiliary groove extending parallel to the main groove, with a ridge protruding higher than the anti-slip surface between the main groove and the auxiliary groove.

Abstract: Provided is a tensioner which has a small total number of components and no risk of incorrect assembly, allows easy load change, is easy to assemble, and excellently stabilizes an oil pressure in a pressure oil chamber. The tensioner 100 includes a relief mechanism that relieves oil to the outside of a plunger 110 when the oil pressure in the pressure oil chamber formed between the plunger 110 and a plunger containing hole 121 in a housing 120 increases, relief holes 141 extending through the plunger 120 from the inside of a plunger inner space 111 to an outer circumferential side thereof, and a hole closing member 142 that is pressed into an opening of each of the relief holes 141 on the outer circumferential side.

Abstract: An object of the present invention is to provide a chain that is easy to assemble, has a longer life and smaller size, and allows larger tolerance for misalignment. The object is achieved by a chain including a plurality of outer links each having a pair of outer plates and pins, and a plurality of inner links each having a pair of inner plates and bushings, alternately and pivotably coupled together in the longitudinal direction of the chain by the pins rotatably inserted into the bushings, with a position restricting part positioned between each pair of the inner plates to restrict inward movement of each pair of inner plates in the chain width direction. The bushings are rotatably inserted in respective bushing holes of each pair of inner plates.

Abstract: A chain tensioner that can ensure oil with such a volume that sufficiently fills a pressure oil chamber in a tensioner body and can quickly fill the pressure oil chamber with the oil with a simple constitution and without increasing a size of the tensioner body is provided. In a chain tensioner including a tensioner body having a plunger holding hole, a plunger, and urging means that is telescopically accommodated in a pressure oil chamber and urges the plunger, the plunger holding hole has a plunger holding wall sliding with the plunger and a plunger holding bottom-surface part, an oil storing chamber is provided on an outer periphery side of the plunger holding wall, and on an end part on the plunger holding bottom-surface part side of the plunger holding hole, a check valve unit that connects the pressure oil chamber and the oil storing chamber are provided.

Abstract: To provide a chain that can reduce friction loss, alleviate wear on sliding surfaces of a chain guide member, and reduce vibration and noise of the running chain. The chain is made up of a multiplicity of inner link plates and outer link plates alternately coupled together by connecting pins along the longitudinal direction of the chain. The height from a pitch line to a highest point on a backside of the plurality of inner link plates (backside height of the inner link plates) is different from the height from a pitch line to a highest point on a backside of the plurality of outer link plates (backside height of the outer link plates) by more than 0 and not greater than 0.5 mm.