GB2082287A - Hookes Universal Joints - Google Patents

Hookes Universal Joints Download PDF

Info

Publication number
GB2082287A
GB2082287A GB8123207A GB8123207A GB2082287A GB 2082287 A GB2082287 A GB 2082287A GB 8123207 A GB8123207 A GB 8123207A GB 8123207 A GB8123207 A GB 8123207A GB 2082287 A GB2082287 A GB 2082287A
Authority
GB
United Kingdom
Prior art keywords
bearing cup
trunnion
bearing
universal joint
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8123207A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRD Co Ltd
Original Assignee
BRD Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BRD Co Ltd filed Critical BRD Co Ltd
Priority to GB8123207A priority Critical patent/GB2082287A/en
Publication of GB2082287A publication Critical patent/GB2082287A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
    • F16C21/005—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement the external zone of a bearing with rolling members, e.g. needles, being cup-shaped, with or without a separate thrust-bearing disc or ring, e.g. for universal joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/41—Couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
    • F16D3/41—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes with ball or roller bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A hookes universal joint with needle roller bearing assemblies in which the rollers have tapered end portions 23 and the bearing cups 10 have undercut grooves 16 at the junction between their side and bottom walls 17 and 18. The groove 16 does not extend in the side wall 17 of each bearing cup beyond the tapered end portions of the rollers, so that edge contact and high stress concentration is avoided. <IMAGE>

Description

SPECIFICATION Hookes Universal Joints This invention relates to hookes universal joints, comprising two yokes each having a pair of limbs supporting bearing assemblies which pivotally receive opposed trunnions of a cross shaped connecting member so that universal pivotal movement between the two yokes is possible. Each bearing assembly comprises a bearing cup with a plurality of needle roller bearings disposed between a cylindrical internal wall of the bearing cup and the trunnion, the needle rollers lying parallel to the pivotal axis of the trunnion and an end surface of the trunnion abutting a bottom wall of the bearing cup either directly or with the intermediary of a thrust washer. Such a universal joint will hereafter be referred to as a universal joint of the kind specified.
According to the invention, we provide a hookes universal joint of the kind specified wherein each bearing cup has an annular groove extending around the junction between the side and bottom wall thereof, and each roller has tapered end portions, the axial extent of the groove along the side wall being less than the length of the tapered end portion of each roller.
By this means, high stress concentrations, at the roller end when the joint is transmitting torque, are avoided.
In order that the rollers are properly supported axially by the end wall of the bearing cup, the amount by which the groove encroaches on the bottom wall of the bearing cup is preferably less than half the diameter of the needle roller bearing.
Preferably the trunnion terminates in a chamfered or relieved portion which does not extend axially beyond the tapered end portions of the needle roller bearings.
The invention will now be described by way of example with reference to the accompanying drawings, which is a section through part of a hookes universal joint embodying the invention.
The illustrated assembly comprises a bearing cup 10, a trunnion 11 which forms part of a cross shaped member 12, and a plurality of needle roller bearings 13 disposed between the trunnion and bearing cup. The bearing cup has an internal cylindrical side wall 14 and a bottom wall 15, an undercut groove 16 extending around the junction between these two walls.
The trunnion 11 has a cylindrical side wall 17, and a planar end wall 18 with a chamfer 19 between these wall. A pyramidal recess 20 is provided in the end of the trunnion, and receives a correspondingly shaped projection from a thrust washer 21 which is interposed between the end wall 18 of the trunnion and the bottom wall 15 of the bearing cup, the pyramidal form of the recess 20 acting to centre the thrust washer on the axis 22 about which relative pivotal movement occurs between the trunnion and bearing cup.
The needle roller bearings 13 are cylindrical in form over the greater part of their length, with tapered (frusto-conical or frusto-ellipsoidal) end portions 23. The ends of the rollers are domed.
It will be noted that the axial extent of the groove 1 6, and of the chamfer 19, is less than the axial extent of the tapered end portions of the needle rollers. By virtue of this, there is not edge contact between the rollers and trunnion and bearing cup, so that high stress concentrations are avoided when the universal joint is transmitting torque and there is a tendency to a degree of misalignment between the trunnion and bearing cup. It will also be noted that the groove 1 6 extends radially inwardly in the bottom wall 1 5 of the bearing cup for a distance less than half the diameter of the needle rollers. This ensures that the rollers are properly supported axially of the assembly.
Lubricant is retained in the assembly by a seal 24 which fits behind a rib 25 at the base of the trunnion. A sealing lip 26 contacts an end surface 27 of the bearing cup to provide the sealing action, and an L-section ring 28 extends close to the outer surface of the bearing cup to provide an additional barrier to protect the seal.
Claims
1. A hookes universal joint of the kind specified, wherein each bearing cup has an annular groove extending around the junction between the side and bottom walls thereof, and the needle roller bearings have tapered end portions, said undercut groove not extending axially of the side wall beyond the tapered end portions of the rollers.
2. A universal joint according to Claim 1 wherein said groove extends radially inwardly on the bottom wall of the bearing cup by an amount less than half the diameter of the needle roller bearings.
3. A universal joint according to claim 1 or claim 2 wherein the trunnion of each bearing assembly terminates in a chamfered or relieved portion which does not extend axially beyond the tapered end portions of the needle roller bearings.
4. A hookes universal joint including a bearing assembly substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Hookes Universal Joints This invention relates to hookes universal joints, comprising two yokes each having a pair of limbs supporting bearing assemblies which pivotally receive opposed trunnions of a cross shaped connecting member so that universal pivotal movement between the two yokes is possible. Each bearing assembly comprises a bearing cup with a plurality of needle roller bearings disposed between a cylindrical internal wall of the bearing cup and the trunnion, the needle rollers lying parallel to the pivotal axis of the trunnion and an end surface of the trunnion abutting a bottom wall of the bearing cup either directly or with the intermediary of a thrust washer. Such a universal joint will hereafter be referred to as a universal joint of the kind specified. According to the invention, we provide a hookes universal joint of the kind specified wherein each bearing cup has an annular groove extending around the junction between the side and bottom wall thereof, and each roller has tapered end portions, the axial extent of the groove along the side wall being less than the length of the tapered end portion of each roller. By this means, high stress concentrations, at the roller end when the joint is transmitting torque, are avoided. In order that the rollers are properly supported axially by the end wall of the bearing cup, the amount by which the groove encroaches on the bottom wall of the bearing cup is preferably less than half the diameter of the needle roller bearing. Preferably the trunnion terminates in a chamfered or relieved portion which does not extend axially beyond the tapered end portions of the needle roller bearings. The invention will now be described by way of example with reference to the accompanying drawings, which is a section through part of a hookes universal joint embodying the invention. The illustrated assembly comprises a bearing cup 10, a trunnion 11 which forms part of a cross shaped member 12, and a plurality of needle roller bearings 13 disposed between the trunnion and bearing cup. The bearing cup has an internal cylindrical side wall 14 and a bottom wall 15, an undercut groove 16 extending around the junction between these two walls. The trunnion 11 has a cylindrical side wall 17, and a planar end wall 18 with a chamfer 19 between these wall. A pyramidal recess 20 is provided in the end of the trunnion, and receives a correspondingly shaped projection from a thrust washer 21 which is interposed between the end wall 18 of the trunnion and the bottom wall 15 of the bearing cup, the pyramidal form of the recess 20 acting to centre the thrust washer on the axis 22 about which relative pivotal movement occurs between the trunnion and bearing cup. The needle roller bearings 13 are cylindrical in form over the greater part of their length, with tapered (frusto-conical or frusto-ellipsoidal) end portions 23. The ends of the rollers are domed. It will be noted that the axial extent of the groove 1 6, and of the chamfer 19, is less than the axial extent of the tapered end portions of the needle rollers. By virtue of this, there is not edge contact between the rollers and trunnion and bearing cup, so that high stress concentrations are avoided when the universal joint is transmitting torque and there is a tendency to a degree of misalignment between the trunnion and bearing cup. It will also be noted that the groove 1 6 extends radially inwardly in the bottom wall 1 5 of the bearing cup for a distance less than half the diameter of the needle rollers. This ensures that the rollers are properly supported axially of the assembly. Lubricant is retained in the assembly by a seal 24 which fits behind a rib 25 at the base of the trunnion. A sealing lip 26 contacts an end surface 27 of the bearing cup to provide the sealing action, and an L-section ring 28 extends close to the outer surface of the bearing cup to provide an additional barrier to protect the seal. Claims
1. A hookes universal joint of the kind specified, wherein each bearing cup has an annular groove extending around the junction between the side and bottom walls thereof, and the needle roller bearings have tapered end portions, said undercut groove not extending axially of the side wall beyond the tapered end portions of the rollers.
2. A universal joint according to Claim 1 wherein said groove extends radially inwardly on the bottom wall of the bearing cup by an amount less than half the diameter of the needle roller bearings.
3. A universal joint according to claim 1 or claim 2 wherein the trunnion of each bearing assembly terminates in a chamfered or relieved portion which does not extend axially beyond the tapered end portions of the needle roller bearings.
4. A hookes universal joint including a bearing assembly substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB8123207A 1980-08-19 1981-07-28 Hookes Universal Joints Withdrawn GB2082287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8123207A GB2082287A (en) 1980-08-19 1981-07-28 Hookes Universal Joints

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8027029 1980-08-19
GB8123207A GB2082287A (en) 1980-08-19 1981-07-28 Hookes Universal Joints

Publications (1)

Publication Number Publication Date
GB2082287A true GB2082287A (en) 1982-03-03

Family

ID=26276616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8123207A Withdrawn GB2082287A (en) 1980-08-19 1981-07-28 Hookes Universal Joints

Country Status (1)

Country Link
GB (1) GB2082287A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439998A1 (en) * 1994-11-09 1996-05-15 Schaeffler Waelzlager Kg Spider bush with highly elastic bottom
US5813916A (en) * 1995-05-03 1998-09-29 Meritor Heavy Vehicle Systems, Llc Retained needle thrust washer
EP1469216A3 (en) * 2003-04-14 2005-01-12 American Axle & Manufacturing, Inc. Universal joint with bearing cup retention seal assembly
WO2006121481A1 (en) * 2005-05-10 2006-11-16 Arvinmeritor Technology, Llc. Universal joint with cup retainer
DE102012111709B3 (en) * 2012-12-03 2013-12-05 Gelenkwellenwerk Stadtilm GmbH Spider for a universal joint
CN103742555A (en) * 2013-12-27 2014-04-23 镇江恒宇传动机械有限责任公司 Axial-clearance-free cross bag

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439998A1 (en) * 1994-11-09 1996-05-15 Schaeffler Waelzlager Kg Spider bush with highly elastic bottom
US5813916A (en) * 1995-05-03 1998-09-29 Meritor Heavy Vehicle Systems, Llc Retained needle thrust washer
EP1469216A3 (en) * 2003-04-14 2005-01-12 American Axle & Manufacturing, Inc. Universal joint with bearing cup retention seal assembly
WO2006121481A1 (en) * 2005-05-10 2006-11-16 Arvinmeritor Technology, Llc. Universal joint with cup retainer
US7361093B2 (en) 2005-05-10 2008-04-22 Arvinmeritor Technology, Llc Universal joint with cup retainer
DE102012111709B3 (en) * 2012-12-03 2013-12-05 Gelenkwellenwerk Stadtilm GmbH Spider for a universal joint
WO2014086613A1 (en) 2012-12-03 2014-06-12 Gelenkwellenwerk Stadtilm GmbH Cross pin for a universal joint
CN103742555A (en) * 2013-12-27 2014-04-23 镇江恒宇传动机械有限责任公司 Axial-clearance-free cross bag

Similar Documents

Publication Publication Date Title
KR0153069B1 (en) Constant velocity joint with a connecting shaft
US5961388A (en) Seal for slip yoke assembly
US7628705B2 (en) Joint seal
CA2292207A1 (en) Constant velocity universal joint and method for assembling the same
EP0657659A1 (en) Universal joint
KR100335739B1 (en) Homokinetic universal joint
US4067626A (en) Universal bearing joint
US4262498A (en) Sealing arrangement for a universal joint
GB2171173A (en) Boot for universal joint
SU1068048A3 (en) Telescopic roller clutch
US2078739A (en) Universal joint
US4482337A (en) Universal joint
GB2082287A (en) Hookes Universal Joints
US3266269A (en) Sealing element
EP0400022A1 (en) Hookes universal joints
JPH023045B2 (en)
US6095925A (en) Seal assembly and seal guard for a universal joint
US4478592A (en) Universal joint sealing assembly
US4512679A (en) Universal joint
US6736731B2 (en) Cross member unit for universal joints having a trunnion seal
US7476156B2 (en) Homokinetic joint
US4324114A (en) Moveable joint seal
US4348196A (en) Universal joint
GB2151719A (en) A sealing assembly for a bearing
SU1045966A1 (en) Spindle universal joint

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)