EP0637905A1 - Soufflet de protection - Google Patents

Soufflet de protection

Info

Publication number
EP0637905A1
EP0637905A1 EP93912044A EP93912044A EP0637905A1 EP 0637905 A1 EP0637905 A1 EP 0637905A1 EP 93912044 A EP93912044 A EP 93912044A EP 93912044 A EP93912044 A EP 93912044A EP 0637905 A1 EP0637905 A1 EP 0637905A1
Authority
EP
European Patent Office
Prior art keywords
bellows
connecting portion
protective
shaft
shaft end
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Withdrawn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
EP93912044A
Other languages
German (de)
English (en)
Inventor
Lars Lindström
Torbjörn MOREN
Olle Noren
Roger Hansson
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.)
Skogs-Och Lantbrukshalsan AB
Original Assignee
Skogs-Och Lantbrukshalsan AB
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 Skogs-Och Lantbrukshalsan AB filed Critical Skogs-Och Lantbrukshalsan AB
Publication of EP0637905A1 publication Critical patent/EP0637905A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
    • A01B71/08—Means for protecting against dust, or the like, or for cleaning agricultural implements
    • 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
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
    • 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
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P1/00—Safety devices independent of the control and operation of any machine
    • 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
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
    • F16D2003/846—Venting arrangements for flexible seals, e.g. ventilation holes
    • 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
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/006—Materials; Production methods therefor containing fibres or particles
    • 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

Definitions

  • the present invention relates to a protective device for a cardan shaft of a transmission from a drive unit to a driven tool or machine, and particularly to a protective bellows, that covers the universal joint of such a cardan shaft.
  • the protective bellows is meant to cooperate with a stationary protective pipe disposed around the rotating shaft, thereby providing an extension of the cardan shaft protection, that entirely covers the universal joints of the shaft ends up to the drive means or tool.
  • the cardan shaft being coupled in this manner constitutes a serious risk of injuries, and demands are made in different places, e.g. by insurance companies and working environment orga ⁇ nizations, to prevent this risk by providing protective devices, that surround the rotating cardan shaft and the universal joint.
  • the wedges slide at the bottom of the groove as the universal joint rotates, and in order to prevent the protective bellows from taking part in the rotation, a chain is attached from one of the wedges to a fixed point on the tractor.
  • This protective bellows is rigid, especially in cold weather, and necessitates great force in order to be pushed together whenever the cardan shaft and the universal joint are to be coupled to the power take-off, apart from it presenting this difficulty also when the universal joint is exposed for oiling. Due to the stiff ⁇ ness of this device, the great force, that is needed to make the universal joint accessible, possibly with a tool acting as a lever, causes the protective bellows to break in pieces.
  • An object of the present invention is to provide a protective bellows, that completely covers the rotating shaft end also as the tractor turns.
  • Another object of the invention is to provide a protective bellows, that can easily be axially pushed together in order to expose the universal joint for maintenance work, such as oiling.
  • Yet another object of the invention is to provide a fastening means cooperating with the bearing of the cardan shaft protective pipe and supporting the protective bellows of the present invention.
  • Fig. 1 schematically shows a universal joint and a portion of a cardan shaft with an axial section view of the device of the invention in a first position
  • Fig. 2 shows the device of fig. 1 in a second position.
  • Fig. 3 shows -the connecting portion of the protective bellows in two views t a cross sectional view and an end view
  • Fig. 4 is a section through the cardan shaft showing an end view of the protective bellows
  • Fig. 5 shows the flexibility of the protective bellows in a drive position at an angular condition between the longitudinal axes of the drive vehicle and of the tool.
  • Fig 1. schematically shows a cardan shaft 1 with a universal joint 2, coupled in a known manner to the propeller sl ⁇ aft 3 in the power take-off (not shown) of the drive unit.
  • the cardan shaft 1 is surrounded in a manner known per se by a protective pipe 4, which at its end presents an annular bearing box 5, which engages with an annular groove 6 on the shaft 7 of the joint yoke.
  • the protective bellows 10 of the invention comprises a bellows 11, a connecting ring 12, a supporting ring 13 and a connecting portion 14.
  • the bellows 11 is preferably made of a helical rubber hose with fabric or steel reinforcements.
  • the connecting ring 12, to which the bellows 11 is attached, provides a centre opening IS providing a passage for the cardan shaft 1 and the protective pipe 4.
  • the ring 12 further provides a number of axial grooves or openings 16, preferably three thereof, equally distributed along a circle inside the periphery of the ring (see also fig. 4).
  • the openings 16 provide at one of their ends a circular enlargement.
  • the supporting ring 13, to which the bellows 11 is also attached, protects the bellows end facing the tractor or-the tool and supports the bellows- against radial forces in order to maintain a circular cross section of the bellows 11.
  • the connecting portion 14 is a rigidly designed cylindrical portion, which provides a centre opening 18 providing a passage for the cardan shaft 1 and the protective pipe 4.
  • the opening 18 provides in its periphery a cross section profile 18' , which is adapted to the outer profile of the annular bearing box 5, by means of which the connecting portion 14 can be firmly attached to the bearing box and secured thereto by means of locking latches or lugs, which are well known to the specialist.
  • the connecting portion 14 extends like a collar around the yoke end of the cardan shaft 1, which is thereby partly received in a conical or bowl-shaped connecting portion recess 19.
  • the connecting portion 14 provides in its even surface, which is turned away from the universal joint 2, a number of pins 20, preferably three thereof, provided with a head, the pin head having a diametre permitting its passage through the circular enlargement 17 of the opening 16, the pin having a diametre permitting its passage along the narrower, groove-shaped portion of the opening 16.
  • Fig. 1 shows the protective bellows 10 in a first position where the bellows 11 is disconnected from the connecting portion 14 and axially displaced along the cardan shaft 1.
  • the connecting portion 14 is, as described above, fixedly attached to the bearing box 5.
  • the universal joint In this first position of the protective bellows 11, the universal joint is entirely exposed and easily accessible for oiling of the joint cross through the lubricant nipple provided approximately at the arrow A at the centre of the joint cross. Normally, this oiling should take place after approxi ⁇ mately 8 working hours, thus constituting a frequently repeated operation.
  • Fig 2. shows the protective bellows 10 in a second position, where the bellows 11 is connected at the connecting portion and entirely covers the universal joint 2. Since the bellows 11 is longer than is the distance between the casting at the power take-off and the position of the connecting ring 12 at the connecting portion 14 in the coupled position, the bellows will rest resiliently against the casting with an axially directed force. In this respect, the bellows 11 is dimensioned so that its length will be sufficient to maintain its radially outer portion of the supporting ring 13 in contact with the casting (see Fig. 5), even when the tractor is turned or driven on broken ground. By a suitable choice of material in the bellows 11 as above, it will be easy to push it together far enough to reach the locking pin 8 when disconnecting the cardan shaft.
  • the connecting portion 14, that is shown schematically both in a cross section view and in an end view in fig. 3, is made in an impact and temperature resistant material, such as nylon.
  • the profile 18' of the opening 18 is given a shape that is adapted to the outer shape of the bearing box 5.
  • the bearing box 5 is integrated with the connecting portion 14, protective pipe 4 attachments being formed in the connecting portion.
  • an appropriate number of pins 20, corresponding to the number of openings 16 and preferably being three, provided with a head are attached in the connecting ring 12.
  • a bayonet-type coupling is provided for the protective bellows 10.
  • Fig. 4 shows, in an end-view with a cut through the cardan shaft 1, the way the bellows 11 is connected to the connecting portion 14 by inserting the pins-20 in the openings 16, initially through the circular enlargements 17 and then, through rotating the bellows 11 and the connecting ring 12 in the direction of the arrow B, along the openings 16 to the ends opposite the enlar ⁇ gements.
  • the arrow C illustrates the rotational direction of the cardan shaft when driven, making it apparent that the bayonet coupling in fig.4 remains locked when co-rotated.
  • the protective bellows 10 is prevented in a conventional manner from rotating with the cardan shaft by means of a (not shown) detachable chain, attached between the tractor/tool and the connecting ring 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Diaphragms And Bellows (AREA)
  • Sealing Devices (AREA)
  • Centrifugal Separators (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Hydraulic Turbines (AREA)

Abstract

Soufflet de protection (10) situé à l'extrémité (2) d'un arbre rotatif et comprenant une partie d'accouplement (14) fixée au palier annulaire d'un tuyau de protection fixe (4) entourant ledit arbre (1), ladite partie d'accouplement (14) comprenant un moyen (20) servant à accoupler de manière libérable un soufflet élastique (11) à cette partie par l'intermédiaire d'un anneau d'accouplement (12), afin de recouvrir complètement ladite extrémité d'arbre (2). Par l'intermédiaire de ce dispositif, on obtient une protection de l'extrémité de l'arbre dans sa totalité en toute circonstance, tout en lui permettant d'être détachée en une seule opération, à des fins d'entretien.
EP93912044A 1992-04-24 1993-04-23 Soufflet de protection Withdrawn EP0637905A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9201300A SE470121B (sv) 1992-04-24 1992-04-24 Skyddsbälg
SE9201300 1992-04-24
PCT/SE1993/000357 WO1993021752A1 (fr) 1992-04-24 1993-04-23 Soufflet de protection

Publications (1)

Publication Number Publication Date
EP0637905A1 true EP0637905A1 (fr) 1995-02-15

Family

ID=20386055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93912044A Withdrawn EP0637905A1 (fr) 1992-04-24 1993-04-23 Soufflet de protection

Country Status (6)

Country Link
EP (1) EP0637905A1 (fr)
AU (1) AU4274893A (fr)
FI (1) FI944957A (fr)
NO (1) NO943976L (fr)
SE (1) SE470121B (fr)
WO (1) WO1993021752A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541511C1 (de) * 1995-11-08 1997-04-24 Walterscheid Gmbh Gkn Schutzvorrichtung für Gelenkwellen mit einem abnehmbaren Schutztrichter
DE602006012481D1 (de) * 2006-09-01 2010-04-08 Benzi & Di Terlizzi S R L Schutzvorrichtung für eine mechanische Kupplung
WO2018181640A1 (fr) * 2017-03-29 2018-10-04 Ｇｒｏｏｖｅ Ｘ株式会社 Structure d'articulation appropriée pour articulation de robot

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064066A (en) * 1970-12-21 1977-12-20 Akio Toshinai Phosphors for infrared-to-visible conversion
JPS62501566A (ja) * 1984-04-24 1987-06-25 オ−ルタ−ネイテイブ　エナ−ジイ　リサ−チ　センタ−，インコ−ポレイテツド 赤外感光性燐光体およびその製造法
US4864536A (en) * 1986-06-05 1989-09-05 Quantex Corporation Optical memory system and method of using the same
EP0289642B1 (fr) * 1987-05-08 1991-12-04 International Business Machines Corporation Disque de mémoire électro-optique effaçable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9321752A1 *

Also Published As

Publication number Publication date
FI944957A0 (fi) 1994-10-21
FI944957A (fi) 1994-10-21
SE9201300L (sv) 1993-10-25
SE9201300D0 (sv) 1992-04-24
NO943976D0 (no) 1994-10-20
NO943976L (no) 1994-10-20
WO1993021752A1 (fr) 1993-11-11
AU4274893A (en) 1993-11-29
SE470121B (sv) 1993-11-15

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19941002

AK Designated contracting states

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

17Q First examination report despatched

Effective date: 19960412

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19961023