Abstract: A one-way clutch of roller type including an outer race having a plurality of pockets provided at their inner peripheries with cam surfaces, an inner race coaxially arranged with the outer race, rollers disposed in the pockets and adapted to transmit torque between the outer race and the inner race when engaged by the cam surfaces, a cage having a cylindrical portion with windows for holding the rollers and a flange portion extending outwardly from the cylindrical portion in a radially outward direction and rotatable relative to the outer race, each window having a circumferential window width smaller than a diameter of a corresponding roller, and springs disposed in the pockets and adapted to bias the rollers toward engagement with the cam surfaces, an inclined surface portion inclined in the axial direction being provided on at least a circumferential part of the inner peripheral surface of the outer race.

Abstract: The present invention provides a one-way clutch of roller type comprising an outer race having at least one pocket provided at its inner periphery with a cam surface, an inner race spaced apart from the outer race radially inside of the outer race and coaxially arranged for a relative rotational movement, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race when engaged by the cam surface, a cage having a cylindrical portion with a window for holding the roller and a flange portion extending outwardly from the cylindrical portion in the outer diameter direction and rotatable relative to the outer race, the window having a circumferential window width smaller than a diameter of the roller, and a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to the cam surface, and wherein an inclined surface portion inclined in the axial direction is provided on the inner periphery of the pocket.

Abstract: A one-way clutch of roller type comprises an outer race having pockets provided at their inner peripheries with cam surfaces, an inner race arranged in an inner diameter side of the outer race coaxially, a plurality of rollers disposed in the pockets and adapted to transmit torque between the outer race and the inner race when engaged by the cam surfaces, and accordion springs disposed in the pockets between the outer race and the rollers and having one ends secured to an axial end face of the outer race and adapted to bias the rollers toward engagement directions with respect to the cam surfaces, and the axial end face of the outer race is provided with a discriminating area to which the accordion springs are secured, and the discriminating area is capable of being discriminated from the other areas.

Abstract: A one-way clutch comprising an outer race provided with a pocket and having a groove portion formed at an inner diameter side of an axial one end face of the outer race, an inner race arranged coaxially with the outer race, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race, a cage having a cylindrical portion with a window and a flange portion extending from an axial one end face of the cylindrical portion in an outer diameter direction, a projection provided on the cylindrical portion, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate secured to abut against the axial one end face of the outer race and provided at its inner diameter portion with spline grooves, and wherein the cage is prevented from being rotated relative to the outer race by fitting the projection in the groove portion.

Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate provided at its inner diameter portion with spline grooves into which a crankshaft of an engine is fitted, and wherein the side plate is secured to the outer race by inserting rivets into through holes provided in the outer race and through holes provided in the side plate and by caulking the rivets.

Abstract: A one-way clutch comprising an outer race having at least one pocket and a stepped portion formed on an axial one end face of the outer race; an inner race spaced apart from and radially inside of the outer race and coaxially arranged for a relative rotational movement; a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race ; a cage rotatable relative to the outer race and having a window formed in a cylindrical portion and having a circumferential width smaller than a diameter of the roller and adapted to hold the roller; and a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to a cam surface; wherein a cover portion for covering at least a part of the pocket is provided on the other axial end face of the outer race.

Abstract: The amount of lubricant oil supplied to a bearing is optimized. A main-shaft lubrication device includes a supply device for variably supplying lubricant oil to bearings which support a main shaft, a collection device for collecting, from the bearings, the lubricant oil supplied from the supply device, a measurement device for measuring the amount of lubricant oil collected by the collection device, and a control device for controlling the amount of lubricant oil to be supplied from the supply device.

Abstract: The present invention provides a one-way clutch of roller type comprising an outer race having at least one pocket provided at its inner periphery with a cam surface, an inner race spaced apart from the outer race radially inside of the outer race and coaxially arranged for a relative rotational movement, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race when engaged by the cam surface, a cage having a cylindrical portion with a window for holding the roller and a flange portion extending outwardly from the cylindrical portion in the outer diameter direction and rotatable relative to the outer race, the window having a circumferential window width smaller than a diameter of the roller, and a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to the cam surface, and wherein an inclined surface portion inclined in the axial direction is provided on the inner periphery of the pocket.

Abstract: A roller-type one-way clutch includes an outer race with a pocket with a cam surface, an inner race, and a plurality of rollers disposed on the pocket, engaged in the cam surface, and transmitting torque between the outer race and the inner race. The clutch further includes a cage provided with a cylindrical part and a window provided in the cylindrical part, holding the plurality of rollers, and a spring provided on the pocket, one end of which is latched to the outer race, and the other end of which is configured for preventing movement of the rollers in the axial direction. The spring energizes the rollers in the engagement direction with the cam surface, and the cage is configured so that it is prevented from dropping off in the axial direction.

Abstract: At least a rotation speed of a rotary shaft and a vibration acceleration in a frequency domain are stored as an operating history, and the operating history is stored not only when the rotation speed of the rotary shaft varies, but also when a maximum value of the vibration acceleration in the frequency domain exceeds a predetermined threshold. Therefore, variation in the rotation speed of the rotary shaft and the chatter vibration occurrence state can be stored in association with each other. Hence, an operator can learn the rotation speed of the rotary shaft and the chatter vibration occurrence state in association with each other. As a result, chatter vibration can be suppressed easily and effectively.

Abstract: The monitoring apparatus includes vibration sensors that detect vibration accompanying machining, a rotation detector and a rotation detection section that detect rotation of a main spindle, and a stability limit and vibration distribution calculation section that creates, on the basis of vibration information obtained from the vibration sensors and a rotation speed of the main spindle detected by the rotation detector and rotation detection section, both a stability limit diagram illustrating a relationship between the rotation speed and a stability limit of the machining and a vibration distribution diagram illustrating a relationship between the rotation speed and the vibration, and displays the created diagrams on a monitor in a vertical arrangement.

Abstract: A vibration suppressing device includes a memory unit storing a stable rotation speed calculated by an arithmetical unit in association with a rotation speed range that includes the stable rotation speed, in which, when a command rotation speed that is a rotation speed of a rotary shaft is inputted in starting machining operation by rotation of the rotary shaft and, the arithmetical unit determines whether the command rotation speed is included in the rotation speed range or not, reads out the stable rotation speed when the command rotation speed is included in the rotation speed range and outputs the stable rotation speed to an NC device instead of the command rotation speed, and starts the machining operation at the stable rotation speed.

Abstract: Provided is a bearing state diagnostic apparatus in which a sound generated from a bearing is detected by a sound sensor, a detected value of the sound sensor is compared with data which was previously formed, thereby diagnosing a state of the bearing, wherein at least one sound sensor is disposed at a position separated away from an outer surface of a cylindrical support body in which at least one bearing is accommodated, the corresponding bearing and sound sensor are in communication with each other through a detection sound propagation path.

Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface and having one end and the other end which include tab portions bent non-straightly from a main body portion, one of the tab portions being locked to an axial end face of the outer race, the other tab portion being pinched between an axial end face of the roller and a flange portion of the cage, and wherein one end of the spring is secured to the outer race and the other end is engaged by the roller, and the one end and the other end are connected to the main body portion of the spring via bent portions, and the bent portions are provided with interference preventing portions for interfering the bent portions with the outer race and the

Abstract: In a vibration suppressing device provided in a machine tool having a rotary shaft for use in rotating a tool or a workpiece, for suppressing chatter vibrations generated during rotation of the rotary shaft, an arithmetical unit performs an analysis on a vibration of the rotary shaft detected by a detector (vibrations sensors) whenever the vibration is detected and a computation based on a result of the analysis. An operator, while checking results of the analysis and/or the computation displayed in real time in a display unit, manipulates a manipulation element to enter a command to change a rotation speed of the rotary shaft into a rotation speed control unit (NC unit) which controls the rotation speed according to the command entered by the operator through the manipulation element.

Abstract: A roller-type one-way clutch includes an outer race with a pocket with a cam surface formed on an inner surface, an inner race separated to the radial inside diameter side with respect to the outer race, disposed concentrically and relatively rotatable, and having an annular outer peripheral raceway surface, a plurality of rollers disposed on the pocket, engaged in the cam surface, and transmitting torque between the outer race and the inner race, a cage provided with a cylindrical part and a window provided in the cylindrical part, holding the plurality of rollers, and having a circumferential width which is smaller than the roller diameter, and a spring provided on the pocket, one end of which is latched to the outer race, the other end of which has roller movement preventive means for preventing the movement of the rollers in the axial direction, and which energizes the rollers in the engagement direction with the cam surface, wherein the cage has cage movement preventive means for preventing the cage from

Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a roller disposed within the pocket to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, and an accordion spring disposed within the pocket and adapted to bias the rollers to be engaged with the cam surfaces, and wherein one end of each accordion spring is secured to an axial end face of the outer race.

Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a plurality of rollers disposed within the pockets to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, a holder having a cylindrical portion and windows provided in the cylindrical portion to hold the plurality of rollers, and springs disposed within the pockets between the outer race and the inner race and adapted to bias the rollers to be engaged with the cam surfaces, and wherein the holder is rotatable relative to the outer race and biasing forces of the springs are transmitted to the holder via the rollers.

Abstract: The present invention provides a one-way clutch comprising an outer race provided with a pocket and having a groove portion formed at an inner diameter side of an axial one end face of the outer race, an inner race arranged coaxially with the outer race, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race, a cage having a cylindrical portion with a window and a flange portion extending from an axial one end face of the cylindrical portion in an outer diameter direction, a projection provided on the cylindrical portion, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate secured to abut against the axial one end face of the outer race and provided at its inner diameter portion with spline grooves, and wherein the cage is prevented from being rotated relative to the outer race by fitting the projection in the groove portion.

Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface and having one end and the other end which include tab portions bent non-straightly from a main body portion, one of the tab portions being locked to an axial end face of the outer race, the other tab portion being pinched between an axial end face of the roller and a flange portion of the cage, and wherein one end of the spring is secured to the outer race and the other end is engaged by the roller, and the one end and the other end are connected to the main body portion of the spring via bent portions, and the bent portions are provided with interference preventing portions for interfering the bent portions with the outer race and the