Abstract: A method for adjusting the meshing position of a hypoid gear having a first gear, and a second gear meshing with the first gear and transmitting the rotary motion thereof in the direction different from the extending direction of the axis of rotation of the first gear.

Abstract: A constant velocity joint includes a cylindrical outer cup which has three guide grooves on an inner wall surface thereof, and an inner member which is housed inside of the aforementioned outer cup and has three trunnions. The aforementioned guide grooves are formed to have a large width and to be close to the center of the aforementioned outer cup, and the aforementioned trunnions are formed to have a large width corresponding to the aforementioned guide grooves. Further, annular rollers are mounted on the periphery of the trunnions, and the periphery surfaces of the aforementioned rollers contact rolling surfaces of the aforementioned guide grooves.

Abstract: A dynamic damper in which the inner diameter (D2) of a first hole part formed at the axial one end part of a body part overlapped with a weight part in the radial direction is set smaller than the inner diameter (D3) of a second hole part formed at the axial other end part of the body part not overlapped with the weight part in the radial direction and tightened with a band member (D3>D2). The outer diameter (D1) of a drive shaft to be press-fitted into the first and second hole parts is set larger than the inner diameter (D2) of the first hole part and the inner diameter (D3) of the second hole part (D1>D3>D2).

Abstract: A method for adjusting the meshing position of a hypoid gear having a first gear, and a second gear meshing with the first gear and transmitting the rotary motion thereof in the direction different from the extending direction of the axis of rotation of the first gear.

Abstract: A constant velocity joint, wherein all of those rolling elements excluding a plurality of rolling elements are divided into a plurality of rolling element groups and arranged along the inner diameter part of a roller member. The excluded plurality of rolling elements are dispersed in first to third cam grooves at intervals in the circumferential direction. When the rolling elements are pressed in the radial outer direction by the first to third pressing faces of a cam rotating in the arrow A direction, they are simultaneously press-fitted into first to third clearances between the rolling elements from the side of the inner diameter part of the roller member.

Abstract: A constant velocity joint, where the tilt angle of a first trunnion relative to a plane crossing perpendicularly to the axis of a second shaft is set to be different from the tilt angle of a second trunnion and the tilt angle of a third trunnion. The tilt angle of the second trunnion and the tilt angle of the third trunnion are set to be equal to or different from each other, and three axes of the first to third trunnions are set to be included on a same plane.

Abstract: An annular member is installed on a circular cylinder section of a trunnion, and a roller member, in the inner periphery of which a needle bearing is held, is installed on the circular cylinder section. The needle bearing is held between a flange section formed on one end of the roller member and the annular member installed on the trunnion with a predetermined gap between them. Further, a gap (X) between the needle bearing and the annular member is set to satisfy the following relationship. X>R/2·(1/cos ? max?1) where R: Radius of rotation of the center of the roller member relative to the center axis of an outer member. ? max: Maximum inclination angle of an inner member.

Abstract: A dynamic damper in which the inner diameter (D2) of a first hole part formed at the axial one end part of a body part overlapped with a weight part in the radial direction is set smaller than the inner diameter (D3) of a second hole part formed at the axial other end part of the body part not overlapped with the weight part in the radial direction and tightened with a band member (D3>D2). The outer diameter (D1) of a drive shaft to be press-fitted into the first and second hole parts is set larger than the inner diameter (D2) of the first hole part and the inner diameter (D3) of the second hole part (D1>D3>D2).

Abstract: A constant velocity joint, wherein all rolling elements annularly held by a tool are inserted into an inner diameter part from one end opposite to the flange part of a roller member along the axis of the inner diameter part of the roller member or the rolling elements remaining after one rolling element is removed from all rolling elements are charged into the inner diameter part and the removed one rolling element is inserted into a clearance between the rolling elements from the other end along the axis of the inner diameter part. After all rolling elements are fitted into the inner diameter part of the rolling member, a snap ring is fitted into an annular groove formed at the end part of the inner diameter part on the opposite side of the flange part to hold the rolling elements between the flange part and the snap ring.

Abstract: A constant velocity joint, wherein all of those rolling elements excluding a plurality of rolling elements are divided into a plurality of rolling element groups and arranged along the inner diameter part of a roller member. The excluded plurality of rolling elements are dispersed in first to third cam grooves at intervals in the circumferential direction. When the rolling elements are pressed in the radial outer direction by the first to third pressing faces of a cam rotating in the arrow A direction, they are simultaneously press-fitted into first to third clearances between the rolling elements from the side of the inner diameter part of the roller member.

Abstract: A tripod constant-velocity universal joint has three guide grooves extending axially along an outer cup, trunnions projecting from a spider inserted into the outer cup, and rollers rotatably mounted on the trunnions through rolling elements. The rollers rotate and slide against guide surfaces of the guide grooves. The rolling elements have flat end faces and are assembled into the rollers by a keystone process. The rollers have flanges for preventing dislodgement of the rolling elements from the rollers. If a distance X by which a rolling element moves radially is maximum, the ratio (W/Dn) of the width W of contact between inner side surfaces of the flanges to the diameter Dn of the rolling element is in a range of from 0% to 30%, and the height h of the flanges also is set to satisfy the ratio value (W/Dn).

Abstract: A constant velocity joint, wherein the tilt angle of a first trunnion relative to a plane crossing perpendicularly to the axis of a second shaft is set to be different from the tilt angle of a second trunnion and the tilt angle of a third trunnion.

Abstract: An annular member is installed on a circular cylinder section of a trunnion, and a roller member, in the inner periphery of which a needle bearing is held, is installed on the circular cylinder section. The needle bearing is held between a flange section formed on one end of the roller member and the annular member installed on the trunnion with a predetermined gap between them. Further, a gap (X) between the needle bearing and the annular member is set to satisfy the following relationship. X>R/2·(1/cos ? max?1) where R: Radius of rotation of the center of the roller member relative to the center axis of an outer member. ? max: Maximum inclination angle of an inner member.

Abstract: A constant velocity joint, wherein all rolling elements annularly held by a tool are inserted into an inner diameter part from one end opposite to the flange part of a roller member along the axis of the inner diameter part of the roller member or the rolling elements remaining after one rolling element is removed from all rolling elements are charged into the inner diameter part and the removed one rolling element is inserted into a clearance between the rolling elements from the other end along the axis of the inner diameter part. After all rolling elements are fitted into the inner diameter part of the rolling member, a snap ring is fitted into an annular groove formed at the end part of the inner diameter part on the opposite side of the flange part to hold the rolling elements between the flange part and the snap ring.

Abstract: A tripod constant-velocity universal joint has three guide grooves extending axially along an outer cup, trunnions projecting from a spider inserted into the outer cup, and rollers rotatably mounted on the trunnions through rolling elements. The rollers rotate and slide against guide surfaces of the guide grooves. The rolling elements have flat end faces and are assembled into the rollers by a keystone process. The rollers have flanges for preventing dislodgement of the rolling elements from the rollers. If a distance X by which a rolling element moves radially is maximum, the ratio (W/Dn) of the width W of contact between inner side surfaces of the flanges to the diameter Dn of the rolling element is in a range of from 0% to 30%, and the height h of the flanges also is set to satisfy the ratio value (W/Dn).

Abstract: Roller members of a constant velocity universal joint are externally fitted to trunnions with a plurality of needle bearings interposed between the roller members and the trunnions. The roller member has an inner diameter portion having an L-shaped cross section by a flange section which protrudes radially inwardly and an annular recess section which is provided and defined by a gap with respect to the trunnion. The plurality of needle bearings are retained on the inner diameter portion of the roller member by paste wax.

Abstract: A variety of cutout surfaces are formed on trunnions by cutting out parts of a spherical surface of each of the trunnions, to which no torque is applied. The cutout surfaces comprise a pair of opposite flat surface sections, bores, recesses or wide flat surfaces, and curved surface sections, for example.

Abstract: A constant velocity universal joint includes an inner roller and a trunnion. The inner roller has a chamfered portion formed by an inclined surface inclined at an angle not less than an assembling angle &thgr;. The inclined surface extends from a starting point defined by a crossing point of a spherical recess of the inner roller and a short radius r of an elliptic cutout formed on the inner roller.

Abstract: A constant velocity universal joint comprises trunnions each of which expands toward a guide groove and each of which is provided with a spherical surface along a circumferential direction, inner rollers each of which has a recess having a spherical surface formed on an inner circumferential surface to make surface-to-surface contact corresponding to the spherical surface, and outer rollers each of which is externally fitted to the inner roller via needle bearings and each of which is provided relatively displaceably with respect to the inner roller along an axial direction (direction of the arrow B) of the trunnion.

Abstract: A constant velocity universal joint comprises trunnions each of which expands toward a guide groove and each of which is provided with a spherical surface along a circumferential direction, inner rollers each of which has a recess having a spherical surface formed on an inner circumferential surface to make surface-to-surface contact corresponding to the spherical surface, and outer rollers each of which is externally fitted to the inner roller via needle bearings and each of which is provided relatively displaceably with respect to the inner roller along an axial direction (direction of the arrow B) of the trunnion.