WO1986000965A1 - Ensembles a arbre - Google Patents

Ensembles a arbre Download PDF

Info

Publication number
WO1986000965A1
WO1986000965A1 PCT/GB1985/000271 GB8500271W WO8600965A1 WO 1986000965 A1 WO1986000965 A1 WO 1986000965A1 GB 8500271 W GB8500271 W GB 8500271W WO 8600965 A1 WO8600965 A1 WO 8600965A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft member
tubular element
shaft
space
assembly
Prior art date
Application number
PCT/GB1985/000271
Other languages
English (en)
Inventor
Leslie George Fisher
Original Assignee
Brd Company 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 Brd Company Limited filed Critical Brd Company Limited
Publication of WO1986000965A1 publication Critical patent/WO1986000965A1/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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles

Definitions

  • This invention relates to shaft assemblies.
  • the invention has been developed in relation to shaft assemblies intended to be used in motor vehicles, and particularly to shaft assemblies as used in transmitting drive from a front mounted engine to the rear axle of a rear wheel drive vehicle. This is usually termed the propeller shaft.
  • a shaft assembly comprising a tubular shaft member and a tubular element surrounding said shaft member with a space defined therebetween, wherein said tubular element is supported at each end relative to said shaft member by a member, preferably of a resilient material, which is a press fit in said space.
  • the tubular element surrounding the shaft member acts as a barrier to escape of noise generated by vibration in the shaft member.
  • the assembly is virtually equivalent to an enclosure for the shaft member, but at much less cost than if a propeller shaft were to be enclosed in the structure of a vehicle. Further, the shaft assembly remains accessible for maintenance purposes, and access is not hindered to other parts of the vehicle.
  • the tubular element does not itself generate noise as it is not subject to direct driveline vibrations. It is important that the tubular element as a whole does not move relative to the shaft member, because that may affect the rotary balance of the assembly, and the tightness of the press fit of the reslient members at the ends of the tubular element must be selected so as to be adequate for this purpose. It will be appreciated, however, that because the shaft member is transmitting torque whereas the tubular element is not, small angular displacements may occur between one or both ends of the tubular element and the shaft member in service. Such movements, which are resisted by friction at the surfaces of the press-fitted members, assist in damping torsional vibrations in the shaft assembly.
  • Each reslient member may comprise a split annulus of a suitable material, e.g. a plastics material.
  • a split annulus facilitates fitting over parts of the shaft assembly which may be of larger diameter than the tubular shaft member itself.
  • the resilient member may include formations which resist withdrawal thereof from said space. Such formations may comprise appropriately angled teeth.
  • a sealing ring may be provided at or adjacent each end of said annular element. This prevents dirt or water reaching the space between the tubular element and shaft member, which could otherwise cause balance or corrosion problems.
  • At least one balance weight may be secured to the shaft member, arranged to abut one of said members of resilient material to assist in holding the latter in place. This, of course, requires that a portion of the surface of the shaft member is not covered by the tubular element. If no portion of the surface of the shaft member is accessible, balance weights may be secured to the accessible surface of the tubular element. If the tubular element is of steel, steel balance weights may easily be spot welded in position and the requirement for such balance weights can be determined by setting the shaft assembly including the tubular element up in a balancing machine in the same way as conventional shafts have been balanced hitherto.
  • the illustrated shaft assembly comprises a shaft member 10 which is of steel tube. At one end, it has secured to it, by a circumferential weld 11, a yoke 12 of a Hookes universal joint indicated generally at 13. Part of another torque transmitting element, such as another joint yoke or an element of a sliding spline connection, is indicated at 14 at the other end of the tubular shaft member 10.
  • a tubular element 15 surrounds most of the length of the shaft member 10. The inside diameter of the tubular element 15 is such that a relatively small annular space is defined between it and the shaft member 10.
  • the tubular element is secured at each end by a split annular member 16 of a resilient material such as a suitable plastics material.
  • Each member 16 includes a flange 17 which abuts the end of tubular element 15, and a portion 18 which is a tight push fit into the annular space between the shaft member and the tubular element.
  • the portion 18 is provided with deformable teeth on its outwardly facing surface, so as to resist being displaced from the space inside the tubular element.
  • Resilient sealing rings 19 are provided one at each end of the tubular element 15, to seal the. space between the shaft member and tubular element, to prevent dirt or water entering the space.
  • one of the members 16 and its associated sealing ring 19 would be placed onto the shaft member. Such positioning is assisted by the member 16 being in the form of a split annulus, so that it can be fitted over weld 11 or other large diameter portion of the shaft assembly. Thereafter the tubular element 15 can be fitted axially, after which the other sealing ring 19 and member 16 would be positioned on the shaft member 10 and pressed into place.
  • balance weights 20 are secured by spot welding to the shaft member 10.
  • the positioning of such balance weights 20 is such that they abut the one member 16, to assist In retaining the latter in position. Balancing of the shaft assembly must, of course, be carried out with the tubular element 15 fitted to the shaft member. If the tubular element 15 is of a material to which balance weights can readily be secured, such weights may of course be secured thereto instead of to the shaft member 10.
  • tubular element 15 may be provided, operative between the tubular element 15 and a part of the shaft member 10 or one of its associated components such as universal yoke joint 12, positively to prevent the tubular element 15 from rotating relative to the shaft member.
  • the tubular member may have a projection or recess at one part of its circumference, engaging a corresponding recess or projection provided on the shaft member or associated component.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Motor Power Transmission Devices (AREA)

Abstract

Un ensemble à arbre, en particulier un ensemble à arbre de transmission pour véhicules à moteur, se compose d'un élément d'arbre tubulaire et d'un élément tubulaire entourant l'élément d'arbre, un espace étant prévu entre ceux-ci pour servir de barrière contre le bruit provoqué par les vibrations de l'élément d'arbre. L'élément tubulaire (15) est maintenu à chaque extrémité par rapport à l'élément d'arbre (10) par un élément (16) ayant la forme d'un anneau fendu en matière plastique, emmanché dans l'espace entre l'élément d'arbre et l'élément tubulaire.
PCT/GB1985/000271 1984-07-25 1985-06-18 Ensembles a arbre WO1986000965A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8418908 1984-07-25
GB848418908A GB8418908D0 (en) 1984-07-25 1984-07-25 Shaft assemblies

Publications (1)

Publication Number Publication Date
WO1986000965A1 true WO1986000965A1 (fr) 1986-02-13

Family

ID=10564407

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1985/000271 WO1986000965A1 (fr) 1984-07-25 1985-06-18 Ensembles a arbre

Country Status (4)

Country Link
EP (1) EP0220177A1 (fr)
GB (2) GB8418908D0 (fr)
WO (1) WO1986000965A1 (fr)
ZA (1) ZA854814B (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001167A (en) * 1933-11-27 1935-05-14 Borg Warner Propeller shaft
FR76354E (fr) * 1957-08-05 1961-10-06 Gen Motors Corp Arbre de transmission rotatif
GB899309A (en) * 1959-09-02 1962-06-20 Opel Adam Ag Vibration-damped drive shaft
US3071851A (en) * 1960-08-18 1963-01-08 Fred L Haushalter Method of making a composite assembly for use between concentric sections of a torsional shaft
FR2271444A1 (fr) * 1974-05-13 1975-12-12 Glaenzer Spicer Sa
EP0032370A2 (fr) * 1980-01-10 1981-07-22 Nissan Motor Co., Ltd. Arbre de commande pour véhicule ou analogue

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001167A (en) * 1933-11-27 1935-05-14 Borg Warner Propeller shaft
FR76354E (fr) * 1957-08-05 1961-10-06 Gen Motors Corp Arbre de transmission rotatif
GB899309A (en) * 1959-09-02 1962-06-20 Opel Adam Ag Vibration-damped drive shaft
US3071851A (en) * 1960-08-18 1963-01-08 Fred L Haushalter Method of making a composite assembly for use between concentric sections of a torsional shaft
FR2271444A1 (fr) * 1974-05-13 1975-12-12 Glaenzer Spicer Sa
EP0032370A2 (fr) * 1980-01-10 1981-07-22 Nissan Motor Co., Ltd. Arbre de commande pour véhicule ou analogue

Also Published As

Publication number Publication date
ZA854814B (en) 1986-02-26
GB8418908D0 (en) 1984-08-30
EP0220177A1 (fr) 1987-05-06
GB2182116A (en) 1987-05-07
GB8623865D0 (en) 1986-11-05
GB2182116B (en) 1988-01-27

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Designated state(s): AT BE CH DE FR GB IT LU NL SE