摘要:
A wheel bearing apparatus incorporating a wheel speed detecting apparatus has an outer member and an inner member. A sensor holder with an embedded wheel speed detecting sensor is mounted on an inner side end of the outer member. A pulser ring has an encoder with circumferential characteristics that alternately and equidistantly change. A metal core is press formed from a steel plate and insert-molded into the sensor holder. A sealing member is integrally bonded to the metal core. A connector for electrically connecting the wheel speed detecting sensor to a harness, connected to an electronic circuit, is mounted at a predetermined position on the circumference of the sensor holder. The connector projects radially outward from the circumference at a predetermined inclined. A recess is formed in the connector. The recess is fit onto an inner side end of the outer member in a manner to cover the inner side end, via a predetermined interface.
摘要:
A vehicle wheel bearing apparatus has an outer member formed with a body mounting flange on its outer circumferential surface. The body mounting flange is to be mounted on a knuckle of the vehicle. The outer member inner circumference includes double row outer raceway surfaces. An inner member includes a wheel hub with a wheel mounting flange formed on one end. A cylindrical portion extends from the wheel mounting flange. At least one inner ring is press-fit onto the cylindrical portion of the wheel hub. The inner ring outer circumference is formed with an inner raceway surface arranged opposite to the double row outer raceway surfaces. Double row rolling elements are freely rollably contained between the outer raceway surfaces and inner raceway surfaces of the outer member and the inner members. Seals are mounted within annular openings formed between the outer member and the inner member. The inner ring is axially secured relative to the wheel hub by a caulked portion. The caulked portion is formed by radially outwardly plastically deforming the end of the cylindrical portion of the wheel hub. Outer side rolling elements of the double row rolling elements are balls. The inner side rolling elements of the double row rolling elements are tapered rollers. The fundamental rated load of the inner side row of tapered rollers is set larger than that of the outer side row of balls.
摘要:
A vehicle wheel bearing apparatus has an outer member with a body flange and double row outer raceway surfaces. An inner member includes a wheel hub and an inner ring. They include inner raceway surfaces arranged opposite to the double row outer raceway surfaces. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces. Outer side rolling elements of the double row rolling elements are balls and inner side rolling elements of the double row rolling elements are tapered rollers. A pitch circle diameter of the inner side tapered rollers is set smaller than that of the outer side balls. A substantially conical recess is formed at an outer side end portion of the wheel hub. The depth of the recess extends to at least near the bottom of the inner raceway surface of the wheel hub. The thickness of a portion of the wheel hub where the inner raceway surface is formed is set within a predetermined range. The outer side wall of the wheel hub has a constant thickness substantially along the inner surface of the recess.
摘要:
An auto-tensioner includes a cylinder, and a sleeve having a bottom and fitted in the cylinder. Hydraulic oil is stored in the cylinder. A plunger is slidably inserted in the sleeve, thereby partitioning the interior of the housing into a pressure chamber and a reservoir chamber. The pressure chamber communicates with the reservoir chamber through an oil passage. A check valve is provided at the oil passage that permits only the flow of hydraulic oil from the reservoir chamber into the pressure chamber through the oil passage. The check valve includes a ceramic ball configured to move into contact with and separate from a seating surface formed on the end of the oil passage facing the pressure chamber, and a retainer for restricting the moving range of the ceramic material. The ceramic ball has a surface roughness Ra of not more than 0.01.
摘要:
A vehicle wheel bearing apparatus has an outer member with double row outer raceway surfaces on its inner circumferential surface. An inner member includes a wheel hub and at least one inner ring. An outer joint member forms a constant velocity universal joint. The outer joint member has a cup-shaped mouth portion. A shoulder portion forms the bottom of the mouth portion. A shaft portion axially extends from the shoulder portion. The shaft is axially separably and torque transmittably inserted into the wheel hub with the shoulder abutted against the caulked portion to transmit torque. The inner ring is axially secured relative to the wheel hub by a caulked portion. The caulked portion is formed by plastically deforming, radially outwardly, the end portion of the cylindrical portion. The caulked portion has a flat surface formed by a cutting process that is adapted to surface contact the shoulder. The radially outermost end of the flat surface is arranged so that it does not abut against the shoulder.
摘要:
A wheel bearing apparatus is formed as a unit of a wheel hub and a double row taper roller bearing. An outer member is formed with double row tapered outer raceway surfaces, each opened axially outward, on its inner circumference. An inner member, including the wheel hub, has a wheel mounting flange integrally formed at one end of the wheel hub. On its larger outer diameter side, the inner ring has a larger flange portion to guide the tapered rollers. The at least one inner ring is secured on the wheel hub by a caulked portion. A predetermined hardened layer is formed by high frequency induction hardening over a range from the base of the wheel mounting flange to the cylindrical portion. A position of the inner side end of the hardened layer is set within a range from an edge of a chamfered portion at the caulked side of the inner ring to a position corresponding to a root of the larger flange portion.
摘要:
A wheel bearing apparatus incorporating a wheel speed detecting apparatus has an outer member and an inner member. Double row rolling elements freely rollably contained between the inner and outer raceway surfaces. Seals are mounted in annular openings formed between the outer member and the inner member. A sensor holder is injection molded from synthetic resin with an embedded wheel speed detecting sensor. The holder is mounted on an inner side end of the outer member. The inner side seal of the seals includes a slinger mounted onto the outer circumference of the inner ring. A pulser ring has an encoder with circumferential characteristics that alternately and equidistantly change. A metal core is press formed from a steel plate and insert-molded into the sensor holder. A sealing member is integrally bonded to the metal core. A connector for electrically connecting the wheel speed detecting sensor to a harness, connected to an electronic circuit, is mounted at a predetermined position on the circumference of the sensor holder. The connector projects radially outward from the circumference at a predetermined inclined. A recess is formed in the connector. The recess is fit onto an inner side end of the outer member in a manner to cover the inner side end, via a predetermined interface.
摘要:
A vehicle wheel bearing apparatus has an outer member with a body flange and double row outer raceway surfaces. An inner member includes a wheel hub and an inner ring. They include inner raceway surfaces arranged opposite to the double row outer raceway surfaces. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces. Outer side rolling elements of the double row rolling elements are balls and inner side rolling elements of the double row rolling elements are tapered rollers. A pitch circle diameter of the inner side tapered rollers is set smaller than that of the outer side balls. A substantially conical recess is formed at an outer side end portion of the wheel hub. The depth of the recess extends to at least near the bottom of the inner raceway surface of the wheel hub. The thickness of a portion of the wheel hub where the inner raceway surface is formed is set within a predetermined range. The outer side wall of the wheel hub has a constant thickness substantially along the inner surface of the recess.
摘要:
A bearing device includes a bearing having an outer race with double-row outer raceway surfaces formed on its inner periphery, a hub wheel and an inner race having double-row inner raceway surfaces formed on outer peripheries thereof opposed to the outer raceway surfaces, and double-row rolling elements interposed between the outer and inner raceway surfaces. The bearing has a constant velocity universal joint separably coupled thereto with a screw fastening structure, in which a stem section of an outer joint member of the constant velocity universal joint is fitted to an inner diameter portion of the hub wheel, and in which a plurality of convex portions extending in an axial direction are formed on the stem section, and a plurality of concave portions having an interference with respect to only circumferential side wall portions of each of the plurality of convex portions are formed on the hub wheel.
摘要:
A wheel bearing apparatus has an outer member, an inner member, at least one inner ring fit onto the inner member. Double row rolling elements are rollably arranged between the outer and inner raceway surfaces, via cages. A seal is mounted on one end of the outer member. The seal has side lips adapted to be in sliding contact with the wheel hub. The seal has three inclined side lips each extending radially outward from the seal body. The lips are adapted to be in sliding contact with the base of the wheel mounting flange. Interference of the side lips against the base of the wheel mounting flange is set so that the radially inner side lip has a smaller interference than that of the radially outer side lips, in order.