TSUBAKIMOTO CHAIN CO.

A cam clutch ( 100 ) according to the present invention is configured such that cams ( 180 ) that are brought into a non-contact state with any one of or both an inner ring ( 110 ) and an outer ring ( 120 ) in a neutral posture and are configured to be able to be engaged with the inner ring ( 110 ) and the outer ring ( 120 ) irrespective of the cams leaning in either of a forward or backward direction are held by a fixed cage ( 130 ) and a movable cage ( 150 ) that is disposed to be relatively rotatable with respect to the fixed cage ( 130 ) and movable in an axis direction, one of the fixed cage ( 130 ) and the movable cage ( 150 ) is provided with guide groove portions ( 160 ), and the other one of the fixed cage ( 130 ) and the movable cage ( 150 ) is provided with pin members ( 140 ), and phases of the movable cage ( 150 ) and the fixed cage ( 130 ) are able to be controlled by causing the pin members ( 140 ) to move along the guide groove portions ( 160 ).

In order to provide a parking lock clutch with which, by means of a simple structure, the layout freedom when constructing a parking lock system can be improved, and a reduction in size and an increase in lifespan can be realized, a selector drive mechanism for driving a selector that switches the operating mode of the parking lock clutch between a lock mode and a free mode to rotate includes a drive rod that rotates the selector between a locked position in which the operating mode is set to the lock mode and a released position in which the operating mode is set to the free mode, and the drive rod is moved in a direction intersecting a plane perpendicular to the rotation axis.

Provided is a selectable clutch that is capable of switching between operation modes with a simple structure, provides high responsiveness, is capable of ensuring a desired torque capacity, and integrates a drive source for operation into a device to achieve a compact configuration. The selectable clutch includes a clutch mechanism and an operation mechanism, and is capable of switching between transmitting and blocking relative rotation of a first rotation element and a second rotation element. The operation mechanism includes a main body part, an annular connection plate provided unable to move in an axial direction with the first rotation element, and a drive unit provided in the main body part and driving the connection plate in the axial direction. The main body part is configured to be capable of supporting a shaft member connected to the first rotation element or the second rotation element by a bearing.

In order to provide a parking lock clutch with which, by means of a simple structure, the switching thrust required to switch the operating mode can be reduced and a reduction in size and an increase in lifespan can be realized, in a lock mode in which relative rotation of an inner race relative to an outer race is prohibited, rollers are sandwiched in a circumferential direction between roller accommodating portions provided in one of the outer race and the inner race and roller support grooves provided in the other, and a radially outward load acting on the rollers is supported by a selector, while roller contact surfaces of the selector that come into contact with the rollers are configured as inclined surfaces that are inclined with respect to the circumferential direction.

The present invention aims to provide a cam clutch that enables smooth switching between operation modes while preventing the occurrence of cam engagement, and achieves noise reduction and long service life with a simple structure, without upsizing and increasing the number of components. The above problem is solved by providing a transmission member ( 161 ), which comes into contact with each of a first cam ( 131 a ) and a second cam ( 131 b ) that have different engaging directions, to be rotatable and movable in the axial direction with its rotational center fixed by a cage ( 140 ), and by configuring the transmission member ( 161 ) such that the transmission member ( 161 ) is able to tilt the first cam ( 131 a ) when rotated and is able to tilt the second cam ( 131 b ) when moved in the axial direction.

A cam clutch unit includes a plurality of cams and rollers. The rollers each include an axially extending shaft portion and a pair of large-diameter portions continuous with respective both ends of the shaft portion. The space between the pair of large-diameter portions forms a groove for an annular spring to fit in. The shaft portion forming the bottom surface of the groove has an outer circumferential surface that allows the spring to contact the groove at a central position in an axial direction of the groove. The outer circumferential surface is a curved surface so that the shaft portion increases in outside diameter monotonically from the central position in the axial direction of the groove towards the large-diameter portions.

To provide a cam clutch that has a simple configuration and is capable of preventing a cam posture changing portion from being strongly sandwiched between a cam, an outer ring and an inner ring, and of tilting a cam efficiently without causing deformation of the cam posture changing portion and the cam themselves. A cam clutch includes an operation mode switching mechanism, wherein the operation mode switching mechanism includes a cam posture changing portion. A plurality of cams each includes inner and outer ring abutment curved surfaces provided at positions facing an outer peripheral surface of the inner ring and/or an inner peripheral surface of the outer ring, and a lateral abutment surface. The lateral abutment surface is connected to ends of the inner and outer ring abutment curved surfaces, and is formed inside of the cam relative to a virtual extension curved surface.

A chain with excellent wear resistance, which minimizes chain elongation, reduces vibration and noise, and improves drive efficiency; the chain includes at least a plurality of link plates and a plurality of pins as chain components. The pins and mutually sliding chain components sliding against the pins are formed with a hardened surface layer containing one of Cr carbide, Ti carbide, V carbide, Nb carbide, Cr nitride, Ti nitride, V nitride, and Nb nitride on part or all of respective sliding surfaces. In the case where the chain includes bushings as chain components and the bushings are the mutually sliding chain components, the bushings are formed with the hardened surface layer on part or all of their sliding surfaces.

Provided is a parking lock clutch that can increase the degree of freedom in controlling the rotational position of a selector with a simple structure, and can implement miniaturization, reduced manufacturing costs, and a longer life. A selector 140 configured to switch an operating mode between a lock mode and a free mode has a pocket 143 configured to accommodate a roller 130 in a roller accommodating portion 117 provided on one of the outer ring 110 and the inner ring 120. The pocket 143 is formed to extend in a circumferential direction so that the selector 140 can be rotated further in an unlocking direction from the rotational angle position at which the roller 130 is accommodated in the roller accommodating portion 117.

To provide a cam clutch that has a simple configuration and is capable of preventing a cam posture changing portion from being strongly sandwiched between a cam, an outer ring and an inner ring, and of tilting a cam efficiently without causing deformation of the cam posture changing portion and the cam themselves. A cam clutch includes an operation mode switching mechanism, wherein the operation mode switching mechanism includes a cam posture changing portion. A plurality of cams each includes inner and outer ring abutment curved surfaces provided at positions facing an outer peripheral surface of the inner ring and/or an inner peripheral surface of the outer ring, and a lateral abutment surface. The lateral abutment surface is connected to ends of the inner and outer ring abutment curved surfaces, and is formed inside of the cam relative to a virtual extension curved surface.