WO2002025127A1 - Articulation a vitesse constante - Google Patents

Articulation a vitesse constante Download PDF

Info

Publication number
WO2002025127A1
WO2002025127A1 PCT/GB2000/003659 GB0003659W WO0225127A1 WO 2002025127 A1 WO2002025127 A1 WO 2002025127A1 GB 0003659 W GB0003659 W GB 0003659W WO 0225127 A1 WO0225127 A1 WO 0225127A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball
socket
joint
joint according
members
Prior art date
Application number
PCT/GB2000/003659
Other languages
English (en)
Inventor
Frederick William Boulton
Original Assignee
Gkn Technology Limited
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 Gkn Technology Limited filed Critical Gkn Technology Limited
Priority to PCT/GB2000/003659 priority Critical patent/WO2002025127A1/fr
Publication of WO2002025127A1 publication Critical patent/WO2002025127A1/fr

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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/221—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being located in sockets in one of the coupling parts
    • 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
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • F16C11/0623—Construction or details of the socket member
    • F16C11/0647—Special features relating to adjustment for wear or play; Wear indicators
    • 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
    • F16D3/30—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected in which the coupling is specially adapted to constant velocity-ratio

Definitions

  • This invention relates to constant velocity joints of a construction particularly useful in the steering columns of motor vehicles.
  • Background Art In motor vehicles the steering column contains a shaft one end of which is fixed to the steering wheel and the other end of which is connected to the steering mechanism. Because of the geometry of the vehicle, the shaft will contain at least one universal joint. There may be two separate single Hooke's joints which y will give approximately constant velocity or, if the geometry requires a greater articulation angle in the shaft, there may be a double Hooke' s joint which is complicated and expensive.
  • steering joints Unlike constant velocity j oints used in drive shafts in the transmission of motor vehicles steering joints must have no circumferential backlash. Steering joints also rotate at slow speeds so that dynamic balance is not a problem but a large articulation angle, up to 45 degrees, is necessary.
  • FR-A-2 244 377 describes a constant velocity joint which includes two shafts which are connected by a first ball and socket joint, an arm carried by each shaft and, adjacent to one end of the arm, pivotally mounted on the shaft about an axis which is perpendicular to the longitudinal axis of the shaft, the arms being connected, adjacent to their other ends by a second ball and socket joint, the plane containing the centres of articulation of both of the ball and socket joints being the bisector plane between the longitudinal axes of the shafts as the constant velocity joints articulates.
  • the object of the invention is to provide a constant velocity joint which is an improvement on that shown in FR-A-2 244 377. Disclosure of the Invention
  • a constant velocity joint which includes two rotary members which are connected by a first ball and socket joint, an arm carried by each member and, adjacent to one end of the arm, pivotally mounted on the member about an axis which is perpendicular to the rotary axis of the member, the arms being connected, adjacent to their other ends, by a second ball and socket joint, the plane containing the centres of articulation of both of the ball and socket joints being the bisector plane between the rotary axes of the members as the constant velocity joint articulates: characterised in that the balls of both joints are of substantially the same diameter and are connected to their respective arms by necks of the same diameter and in that the wrap angle of the two sockets is the same and in that the socket of each ball and socket joint includes means to hold the ball in the socket and a spring-loaded seat which pushes the ball against said means so that there is no axial clearance between the ball and the socket.
  • wrap angle we mean the angle subtended at the centre of the ball by the free edge of the socket or ball retaining means in the socket.
  • the holding means may be a seating ring held in position by a spring ring received in an internal groove in the socket or the end of the socket may be crimped over to hold the ball in place.
  • a spring ring received in an internal groove in the socket or the end of the socket may be crimped over to hold the ball in place.
  • two retaining seats which are in angular contact with the balls are used to prevent backlash, the spring loading acting on one of the seats.
  • each of said arms is of U-shape with the member to which it is pivoted received between the legs of the TJ.
  • the arms are pivoted to the rotary members at positions offset from the longitudinal axes of the members.
  • Figure 2 is an end elevation of the joint of Figure 1;
  • Figures 3 and 4 show the limits of the joint articulation
  • Figures 5 A and 5B are longitudinal sections through one of the ball and socket joints;
  • Figure 6 is a longitudinal section through one of the joint members;
  • Figure 7 is an end elevation of the joint member shown in Figure 6;
  • Figure 8 is a diagram illustrating the dimensions of the ball and socket joint
  • Figures 9 and 10 show a modified form of joint
  • Figure 11 shows a further modified form of joint
  • Figure 12 shows a still further modified form of joint.
  • the joint comprises two identical members 20 and 21 each rotatable about a longitudinal axis 22 and 23 respectively.
  • each member has a bore 24 to receive a shaft and two ears 25 which can be pulled together by pinch bolt, not shown, to secure a shaft in the bore 24.
  • the end of the member 20 has an attachment portion 26 which has an attachment lug 27 having a through bore 28.
  • the portion 26 also has a longitudinal threaded bore 29.
  • a first ball and socket joint 30 is interposed between the members
  • the construction of the ball and socket joint is shown in Figure 5.
  • the ball is indicated at 31 and has a neck32.
  • the neck 32 carries a flange 33 which is adjacent to a threaded portion 35.
  • the threaded portion 35 is received in the bore 29 of the member 20 and the flange 33 engages the end surface of the attachment portion 26.
  • the socket is indicated at 36 and has a threaded stem 37. Internally it has a seating ring 38 having a conical seat 39 which is engaged by the ball.
  • a spring 40 is arranged behind the seating ring and may be a resilient plastic washer or a wavy spring for example.
  • the ball is held in position in the socket by a seating ring 41 having a conical seat to engage the ball.
  • the ring 41 is held in position by a circlip 42 which engages in grooves 43 and 44 in the socket and ring respectively.
  • the stem 37 of the socket is received in the bore 29 of the member 21. It will be seen therefore that the members 20 and 21 are connected by the first ball and socket joint 30.
  • the members 20, 21 are also connected by a second ball and socket joint 45 which is identical to the first ball and socket joint 30 thus the diameter of the balls of the joints are the same and the diameter of the necks are the same.
  • the second ball and socket joint 45 is connected to the members 20 and 21 by U-shaped arms 46 and 47 which are identical.
  • the arm 46 is of U-shape having limbs 48 and a cross-member 49 which has a threaded bore 50.
  • the threaded stem of the socket 51 of the second ball joint is received in the bore 50 of the arm 46 and the threaded stem of the second ball 52 is received in the bore 50 of the arm 47.
  • the arms 46 and 47 are connected to the members 20 and 21 respectively by pivots 53 and 54 received in the bores 28 and which may include needle roller bearings. It will be seen that the arms are connected to the members about axes which are perpendicular to the rotary axes 22 and 23 but are offset therefrom.
  • Figures 3 and 4 show the limits of articulation of the joint.
  • the angle of articulation is limited by the engagement of the free edge of the socket 36 with the neck 32 of the ball 31.
  • the centres 55 and 56 of the balls 31 and 52 lie in the bisector plane 57 of the joint, i.e. the plane which bisects the angle between the rotary axes 22 and 23 of the members 20 and 21.
  • FIG. 8 is a diagram showing the relationship between the ball diameter R and the neck diameter r.
  • the angle "x” is the safety angle or wrap angle which prevents the ball from pulling out of the socket.
  • Angle "y” is the articulation angle.
  • a particular articulation angle and a safety or wrap angle one can choose the appropriate relationship between the ball diameter and the diameter of the neck. For abending angle of 45°, for example, and a safety angle of 15° the ratio of the ball diameter R to the neck diameter r is 2: 1.
  • Figures 9 and 10 show a modification of the joint shown in Figures 1 and 2.
  • the ball joints are surrounded by bellows 57 and 58 which retain lubrication and keep out dirt.
  • the limbs 60 and 61 of one of the U-shaped arms has projections 62 and 63 respectively. These projections are normally clear of the joint member 64 so for light loads there is little friction between the arm and the joint member as the joint articulates. However when there is a heavy load, for example if the power steering fails, the projection 62 or 63 would come into contact with the member 64. This would provide a high friction situation but nevertheless would prevent there being undue, loads on the pivot 65.
  • Figure 11 shows a simplified form of joint in outline. The essential construction of the joint, however, is as described above.
  • Figure 12 shows a joint in which the socket 70 has its end crimped over at 71 to retain the ball 72 in position.
  • the ball 72 is located without backlash by the rings 73 and 74.
  • the invention provides a constant velocity joint which is an improvement over the prior art and is suitable for use as a steering joint.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

La présente invention concerne une articulation à vitesse constante qui comprend deux éléments (20, 21) rotatifs qui sont connectés par une première boule et par une première chape (30), une tige (46, 47) portée par chaque élément, et ces éléments sont contigus à une extrémité de cette tige. Cette tige est montée pivotante (53, 54) sur l'élément autour d'un axe perpendiculaire à l'axe de rotation de cet élément. Ces tiges sont connectées, près de leur autre extrémité, par une seconde boule et une seconde chape (45). Les boules (31, 52) de ces deux articulations sont sensiblement de même diamètre, elles sont connectées à leur tige respective par des cols (32) de même diamètre et les arcs de contact des deux chapes sont les mêmes. Les plans (57) contenant les centres d'articulation des deux chapes à boule sont des plans de bissectrice entre les axes rotatifs (22, 23) des éléments lorsque ces articulations à vitesse constante jouent.
PCT/GB2000/003659 2000-09-25 2000-09-25 Articulation a vitesse constante WO2002025127A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB2000/003659 WO2002025127A1 (fr) 2000-09-25 2000-09-25 Articulation a vitesse constante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2000/003659 WO2002025127A1 (fr) 2000-09-25 2000-09-25 Articulation a vitesse constante

Publications (1)

Publication Number Publication Date
WO2002025127A1 true WO2002025127A1 (fr) 2002-03-28

Family

ID=9885780

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/003659 WO2002025127A1 (fr) 2000-09-25 2000-09-25 Articulation a vitesse constante

Country Status (1)

Country Link
WO (1) WO2002025127A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR884129A (fr) * 1942-07-10 1943-08-03 Accouplement articulé pour arbres de transmission, pour la transmission de force à une même vitesse angulaire
FR2244377A5 (en) 1973-09-19 1975-04-11 Bastid Philippe Constant speed universal shaft joint - shaft ends have projecting pivot arms joined by a ball and socket joint
GB2100337A (en) * 1981-06-13 1982-12-22 Lemfoerder Metallwaren Ag A ball-and-socket joint
US5704838A (en) * 1995-05-18 1998-01-06 Drilex Systems, Inc. Down-hole motor universal joint

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR884129A (fr) * 1942-07-10 1943-08-03 Accouplement articulé pour arbres de transmission, pour la transmission de force à une même vitesse angulaire
FR2244377A5 (en) 1973-09-19 1975-04-11 Bastid Philippe Constant speed universal shaft joint - shaft ends have projecting pivot arms joined by a ball and socket joint
GB2100337A (en) * 1981-06-13 1982-12-22 Lemfoerder Metallwaren Ag A ball-and-socket joint
US5704838A (en) * 1995-05-18 1998-01-06 Drilex Systems, Inc. Down-hole motor universal joint

Similar Documents

Publication Publication Date Title
CA1097935A (fr) Joints de cardan telescopiques
CN1048079C (zh) 转向柱组合装置
KR100342282B1 (ko) 자동차용댐핑플라이휠
US10156265B2 (en) Articulating torsional coupling
US7232000B2 (en) Drive-steer axle for motor-driven vehicles
US6488589B2 (en) Apparatus for driving wheel of automobile
CA1234169A (fr) Systeme de suspension independante de roue avec joints homocinetiques porteurs sur paliers de butee
KR19990028711A (ko) 삼각대형 정속비 범용 조인트
CA1216436A (fr) Accouplement
US6976922B2 (en) Precision thrust bearing joint
US4368050A (en) Coupling
JP4245849B2 (ja) プロペラシャフト用等速自在継手
US4685897A (en) Universal joint for tilt steering wheel
WO2002025127A1 (fr) Articulation a vitesse constante
EP0279127B1 (fr) Joint universel télescopique à tripode
AU2004208711A1 (en) Elastomeric Coupling for Rotating Shafts
KR20010101926A (ko) 정속 유니버설 조인트 및 이 조인트용 기계 전동부재
US7607984B2 (en) Device to limit the amount of angular displacement in ball-type fixed CV joints
US6464615B1 (en) Link connecting structure of friction wheel continuously variable transmission
US6120381A (en) Sliding constant-velocity joint, particularly for longitude drives
JPS59131032A (ja) 自在継手
EP1626189A2 (fr) Joint homocinétique à centre fixé
JP2024058614A (ja) トリポード型ジョイント及び自動車

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CN DE GB IN JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP