WO2005012746A1 - Joint homocinetique de type tripode - Google Patents

Joint homocinetique de type tripode Download PDF

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Publication number
WO2005012746A1
WO2005012746A1 PCT/JP2004/010581 JP2004010581W WO2005012746A1 WO 2005012746 A1 WO2005012746 A1 WO 2005012746A1 JP 2004010581 W JP2004010581 W JP 2004010581W WO 2005012746 A1 WO2005012746 A1 WO 2005012746A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
constant velocity
velocity universal
peripheral surface
tripod
Prior art date
Application number
PCT/JP2004/010581
Other languages
English (en)
Japanese (ja)
Inventor
Yoji Sato
Masafumi Nakakoji
Tetsuro Kadota
Original Assignee
Ntn Corporation
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 Ntn Corporation filed Critical Ntn Corporation
Publication of WO2005012746A1 publication Critical patent/WO2005012746A1/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
    • F16D3/202—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 one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—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 one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2055—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 one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints

Definitions

  • the present invention relates to a sliding type constant velocity universal joint used for transmitting power to automobiles and various industrial machines.
  • a conventional general tripod type constant velocity universal joint includes an outer joint member 1, an inner joint member 2, and a roller 3, as shown in FIG.
  • the roller 3 is rotatably supported by a 21 dollar bearing structure. That is, a number of needle rollers 4 are interposed between the trunnion journal 2 a of the inner joint member 2 and the rollers 3, and a washer 5 is arranged to prevent the needle roller 4 from dropping off, and the washer 5 is disengaged.
  • a retaining ring 6 is attached to stop.
  • a roller interposed between the outer joint member and the trunnion journal to transmit the torque generally has a bearing of $ 21. The mechanism is attached.
  • a twenty-one dollar port is arranged directly on the cylindrical outer peripheral surface of the trunnion journal. Needle bearings are formed between the inner peripheral surface and the inner peripheral surface.
  • the tripod-type constant velocity universal joint disclosed in Japanese Patent No. 26323214 employs a double roller type which is relatively rotatable via a needle roller.
  • a so-called tri-knob type tripod in which a cylindrical inner peripheral surface of a roller is externally fitted to a spherical trunnion journal.
  • a type constant velocity universal joint is described. Disclosure of the invention A general tripod-type constant velocity universal joint employs a 21 dollar bearing mechanism, and therefore has the following problems.
  • the size of the outer joint member must be as large as possible. It has to be large enough to incorporate the pairing mechanism.
  • a main object of the present invention is to reduce the size and cost of a tripod type constant velocity universal joint.
  • a track groove extending in the axial direction is formed at a circumferentially equal position on the inner peripheral surface at three equally divided positions.
  • the inner peripheral surface of the roller is formed in an arc-shaped convex cross section, and the outer peripheral surface of the trunnion journal is straight in the vertical cross section, and contacts the inner peripheral surface of the roller in a direction perpendicular to the joint axis in the cross section. And a clearance is formed between the inner peripheral surface of the roller and the joint in the axial direction of the joint.
  • the trunnion journal and the roller, and the roller and the outer joint member are in direct contact with each other.
  • the resistance to the sliding movement and the rotation movement of the roller can be reduced by making the convex surfaces contact each other and reducing the contact area. Therefore, by making the inner peripheral surface of the roller externally fitted to the trunnion journal into an arc-shaped convex cross section, the roller comes into contact with a small area, and the resistance of the sliding motion and the rotational motion of the roller in the axial direction of the trunnion journal is reduced. Decrease. In that case, the number of parts is significantly smaller than that of the conventional tripod type constant velocity universal joint.
  • the trunnion journal has a substantially elliptical cross section.
  • substantially elliptical is not limited to a literal ellipse, but includes shapes generally referred to as an oval, an oval, and the like.
  • the surfaces that come into contact with each other, that is, one or both of the outer peripheral surface of the trunnion journal and the inner peripheral surface of the roller, and one or both of the outer peripheral surface of the roller and the inner surface of the roller joint outer member are resistant to It is preferable to perform a surface treatment for the purpose of improving abrasion or low friction.
  • the tripod type constant velocity universal joint of the present invention has a structure that does not use a rolling element such as a doll roller, as compared with a conventional general tripod type constant velocity universal joint, so that the number of parts can be reduced, and Costs can be reduced.
  • FIG. 1A is a front view showing a cross section of a part of a tripod type constant velocity universal joint according to a first embodiment.
  • FIG. 1B is a plan view of the trunnion journal and rollers in FIG. 1A.
  • FIG. 2 is a longitudinal sectional view of the tripod type constant velocity universal joint of FIG. 1A.
  • FIG. 3 is a sectional view of a roller in the tripod constant velocity universal joint of FIG. 1A.
  • FIG. 4 is a front view of a cross section of a part of a tri-board type constant velocity universal joint showing a conventional technique.
  • BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
  • This tripod-type constant velocity universal joint is composed of three types of parts, an outer joint member 10, an inner joint member 20, and a roller 30. The number of parts is significantly smaller than that of).
  • the outer joint member 10 includes a substantially cylindrical mouth portion 12 opened at one end, and a stem portion 14 having a selection shaft portion for coupling to an input or output shaft.
  • a track groove 16 extending in the axial direction is formed on the inner peripheral surface of the mouse part 12 at three equally circumferential positions.
  • the side walls of the track grooves that face each other in the circumferential direction serve as a roller guide surface 18 that provides a trajectory for a roller 30 described later to roll.
  • the roller guide surface 18 is a part of a cylindrical surface parallel to the axis of the outer joint member 10.
  • the inner joint member 20 includes a boss 22 and a projection journal 26 protruding from the boss 22 in the radial direction.
  • the boss portion 22 is formed with a selection hole 22 for coupling to an output shaft or an input shaft.
  • the trunnion journals 26 are formed on the outer peripheral surface of the boss portion 22 at three equally circumferential positions, and each trunnion journal 26 rotatably carries a roller 30.
  • the roller 30 has an inner peripheral surface 32 having an arc-shaped cross section in a convex arc shape and an outer peripheral surface 34 having a spherical shape.
  • the generatrix of the inner peripheral surface 32 of the roller 30 has a convex arc shape
  • the generatrix of the outer peripheral surface 34 has a convex arc shape having substantially the same curvature as the roller guide surface 18 of the outer joint member 10.
  • the inner peripheral surface 32 of the roller 30 is in direct contact with the outer peripheral surface 28 of the trunnion journal 26 without the rolling element such as a needle roller between the trunnion journal 26 and the roller 30.
  • the cross section of the trunnion journal 26 is elliptical, and the minor axis of the ellipse extends in the axial direction of the joint. Therefore, a predetermined gap 36 (FIG.
  • the roller 30 is capable of moving the trunnion journal 26 in the axial direction and swinging with respect to the trunnion journal 26.
  • the inner joint member 20 is located inside the outer joint member 10, and the roller 3 rotatably supported by the trunnion journal 26 of the inner joint member 20. 0 is stored in the track groove 16 of the outer joint member 10.
  • the roller 30 is disposed on the trunnion journal 26 because the tangent ellipse with the trunnion journal 26 is close to a point. Rotation and axial movement can be performed smoothly.
  • Examples of such surface treatments include lubricating J3 treatment, metal spraying, plating, and attaching a sliding material.

Landscapes

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

Abstract

L'invention concerne un joint homocinétique de type tripode, dans lequel le contact entre le tourillon (26) et le galet (30) et le contact entre le galet (30) et la partie (10) externe du joint sont directs, sans corps de roulement intermédiaires, et formé de telle manière que le contact elliptique entre le tourillon (26) et le galet (30) est quasiment ponctuel.
PCT/JP2004/010581 2003-07-31 2004-07-16 Joint homocinetique de type tripode WO2005012746A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-284423 2003-07-31
JP2003284423A JP2005054835A (ja) 2003-07-31 2003-07-31 トリポード型等速自在継手

Publications (1)

Publication Number Publication Date
WO2005012746A1 true WO2005012746A1 (fr) 2005-02-10

Family

ID=34113839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/010581 WO2005012746A1 (fr) 2003-07-31 2004-07-16 Joint homocinetique de type tripode

Country Status (3)

Country Link
JP (1) JP2005054835A (fr)
TW (1) TW200504297A (fr)
WO (1) WO2005012746A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4943169B2 (ja) * 2007-01-23 2012-05-30 Ｎｔｎ株式会社 トリポード型等速自在継手
JP2010090937A (ja) * 2008-10-06 2010-04-22 Ntn Corp トリポード型等速自在継手
WO2011114505A1 (fr) * 2010-03-19 2011-09-22 Ntn株式会社 Joint universel homocinétique tripode
US10174793B2 (en) 2013-10-30 2019-01-08 Steering Solutions Ip Holding Corporation Tripot constant velocity joint
KR101884926B1 (ko) * 2014-10-30 2018-08-02 스티어링 솔루션즈 아이피 홀딩 코오포레이션 트라이폿 등속 조인트
KR102222279B1 (ko) * 2019-01-29 2021-03-04 서한산업(주) 일체형 롤러를 구비한 등속 조인트 어셈블리

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4950642U (fr) * 1972-08-14 1974-05-04
JPS5376253A (en) * 1976-12-20 1978-07-06 Toyota Motor Corp Universal coupling
JPS5390162U (fr) * 1976-12-23 1978-07-24
JPH07317789A (ja) * 1994-05-31 1995-12-08 Ntn Corp 等速自在継手
JP2001208091A (ja) * 2000-01-27 2001-08-03 Ntn Corp 等速自在継手
JP2002054649A (ja) * 2000-08-11 2002-02-20 Ntn Corp トリポード型等速自在継手

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4950642U (fr) * 1972-08-14 1974-05-04
JPS5376253A (en) * 1976-12-20 1978-07-06 Toyota Motor Corp Universal coupling
JPS5390162U (fr) * 1976-12-23 1978-07-24
JPH07317789A (ja) * 1994-05-31 1995-12-08 Ntn Corp 等速自在継手
JP2001208091A (ja) * 2000-01-27 2001-08-03 Ntn Corp 等速自在継手
JP2002054649A (ja) * 2000-08-11 2002-02-20 Ntn Corp トリポード型等速自在継手

Also Published As

Publication number Publication date
JP2005054835A (ja) 2005-03-03
TW200504297A (en) 2005-02-01

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