Nsk Corporation

Nippon Seiko Kabushiki Kaisha

Delphi Technologies, Inc.

Yasumasa Mizukoshi

Hideo Ouchi

Minoru Ishijima

Shigeoki Kayama

Toshihiro Ikeda

Takeo Ohkuma

Naoki Mitsue

Yoshiaki Onose

A constant velocity joint of tripod type which is both highly strong and durable, and which can maintain a low axial force and low shudder when transmitting torque at a joint angle. The constant velocity joint of tripod type comprises a roller assembly including an outer roller, an inner roller and a needle bearing located therebetween. The outer roller is provided with needle bearing retaining rings and needle bearing stop rings, at each of its upper and lower ends, respectively. The inner roller moves relative to the outer roller in the axial direction. The outer face of the inner roller and the inner face of the outer roller have generally spherical shapes of dimensions similar to each other to freely engage, respectively. The outer face of the trunnion is provided with a partially cylindrical portion with inclined relative to a trunnion centerline.

Constant velocity joint of tripod type

The object of the invention is to provide a constant velocity joint of tripod type which is both highly strong and durable, and which can minimize rolling resistance when transmitting torque at a joint angle. A tripod type constant velocity joint comprises a housing secured to a first rotating shaft and a tripod having trunnion axes spaced apart equally in a circumferential direction and securing equally to the second rotating shaft. The cross section normal to the trunnion axis is shaped to an ellipse and the direction of its short diameter is arranged parallel to the second rotational shaft.

Constant velocity joint and rolling bearing unit for wheel

A compact and light weight axle unit with good durability and reliability for driving a vehicle wheel is provided wherein the splined bore,of the hub,is engaged with the splined shaft,of the drive shaft member,and a stop ring,is held between the outer engagement groove,on the inner peripheral surface of the splined bore,and the inner engagement groove,on the outer peripheral surface of the splined shaft,to prevent the splined shaft,from being removed.

Axle unit for driving a vehicle wheel

A compact and light weight axle unit with good durability and reliability for driving a vehicle wheel is provided wherein the splined bore,of the hub,is engaged with the splined shaft,of the drive shaft member,, and a stop ring,is held between the outer engagement groove,on the inner peripheral surface of the splined bore,and the inner engagement groove,on the outer peripheral surface of the splined shaft,to prevent the splined shaft,from being removed.

A rolling bearing unit has a hub which is formed with a housing for partly forming a constant velocity joint, wherein a connecting tube,of a magnetic metal plate is provided to have a base half portion,fitted onto the opening portion of the housing and a tip half portion,projecting from the housing, and a number of through holes,are formed in an axial portion of the base half portion and arranged circumferentially to function as a tone wheel.

Tone wheel built in constant velocity joint

A constant velocity joint of a tripod type comprising a housing formed with three recesses having first and second guide grooves each extending axially in the housing, a tripod comprising trunnions with a bearing assembly having an inner roller and an outer roller in a rolling contact relationship and the first and second guide grooves formed such that the outer roller is tightly pressed on the first guide groove when a rotating force is transmitted, and that the axis of each of the trunnions is displaced from a parallel relationship with the flat bottom face of the first guide groove when the outer roller is pressed thereon with the joint angle kept zero.

Tripod type constant velocity joint

In a tripod type constant velocity joint, out of the pair of guide surfaces, the guide surface on the anchor side to tightly press the outer peripheral face of the outer roller when the rotational torque is transmitted in a predetermined direction is made non-parallel to the central axis of the trunnion under a zero joint angle condition, and there are provided guide portions each having a contact surface to contact with a side face of the outer roller at the anchor side on the side on which a distance between the guide surface on the anchor side and the central axis of the trunnion is extended.

A compact and light weight axle unit with good durability and reliability for driving a vehicle wheel is provided wherein the splined bore 28 of the hub 6a is engaged with the splined shaft 30 of the drive shaft member 29, and a stop ring 35 is held between the outer engagement groove 25 on the inner peripheral surface of the splined bore 28 and the inner engagement groove 24 on the outer peripheral surface of the splined shaft 30 to prevent the splined shaft 30 from being removed.

A rolling bearing unit has a hub which is formed with a housing for partly forming a constant velocity joint, wherein a connecting tube 20 of a magnetic metal plate is provided to have a base half portion 21 fitted onto the opening portion of the housing and a tip half portion 22 projecting from the housing, and a number of through holes 26 are formed in an axial portion of the base half portion and arranged circumferentially to function as a tone wheel.

Tone wheel built-in constant velocity joint

In a tripod type constant velocity joint a tripod is disposed within a cylindrical housing such that three equi-angularly spaced trunnions of the tripod are received within corresponding recesses of the housing. Each trunnion has a spherical roller mounted thereon through a plurality of rolling bearing members, and a cylindrical roller mounted on the spherical roller. An inner peripheral concave spherical surface of the cylindrical roller is in intimate sliding contact with an outer peripheral convex spherical surface of the spherical roller, and an outer cylindrical surface of the cylindrical roller is in rolling contact with the opposite side surfaces of the corresponding recess. The rolling bearing members, the spherical rollers, and the cylindrical rollers are disposed within a circle formed by linking the ends of the trunnions together.

A tripot type constant velocity universal joint comprises a first rotary member provided with three sets of track surfaces each consisting of two parallel planar surfaces, a second rotary member provided with three trunnions corresponding to the track surfaces, and cylindrical roller assemblies loosely fitted to the trunnions and fitted on the track surfaces. The cylindrical roller assemblies are pivoted around corresponding points on the axes of the trunnions. The roller assemblies have a pivot controlling member for controlling pivot of the roller assemblies.

Growing community of inventors

Fujisawa, Japan

Yasumasa Mizukoshi