WO1989006325A1 - Systeme de couvercle pour arbre de prise de force - Google Patents

Systeme de couvercle pour arbre de prise de force Download PDF

Info

Publication number
WO1989006325A1
WO1989006325A1 PCT/GB1989/000011 GB8900011W WO8906325A1 WO 1989006325 A1 WO1989006325 A1 WO 1989006325A1 GB 8900011 W GB8900011 W GB 8900011W WO 8906325 A1 WO8906325 A1 WO 8906325A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
power take
ring
bearing
cover
Prior art date
Application number
PCT/GB1989/000011
Other languages
English (en)
Inventor
George Wakeling
Original Assignee
George Wakeling
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 George Wakeling filed Critical George Wakeling
Publication of WO1989006325A1 publication Critical patent/WO1989006325A1/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
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P1/00—Safety devices independent of the control and operation of any machine
    • F16P1/02—Fixed screens or hoods
    • 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
    • F16D3/841—Open covers, e.g. guards for agricultural p.t.o. shafts

Definitions

  • the present invention relates to Power Take Off (PTO) shaft covers and more particularly to covers made of a plastics material.
  • PTO Power Take Off
  • PTO covers made from plastics material are known and a known design is described in British Patent No. 2,121,137 to the same applicant.
  • This design provides a solution to the problem of accidental damage to the PTO cover by ensuring that the bearing ring on the PTO cover remains engaged with the shaft.
  • the design has a number of disadvantages. Firstly to achieve security for the cover the bearing rings on the shaft and cover need to be closely sized and secondly the bearing rings need to be in good condition and not worn.
  • the present invention therefore provides a power take off cover system including a pair of funnel shaped members each member being dimensioned to protect a universal joint structure on one end of a power take take off (PTO) shaft in which, at least one member being provided with a first bearing surface for mateable connection with a second bearing surface the PTO shaft the first bearing surface being formed as a circumferential slot in the first member.
  • PTO power take take off
  • each funnel shaped member is moulded with the slot integrally formed therein and preferably a circumferential lead in edge is provided adjacent the slot to allow easier assembly of the cover onto the PTC shaft.
  • the PTO shaft is provided with a bearing ring of standard outer diameter size the bearing ring being permanently attached to the shaft.
  • the bearing rings are preferably supplied in a range of internal diameter sizes to fit various diameters of shaft.
  • the PTO cover system comprises a funnel-shaped member 10 which is permanently attached to )or formed integrally with) an elongate tube 12.
  • the tube 12 co-operates with a further tube shown) which preferably has an identical end construction, tubes 12 and 12' being preferably telescopically movable to accommodate different lengths of drive shaft 14.
  • Drive shaft 14 has attached rigidly thereto a universal joint of known construction which as shown comprises two portions 16, 18, portion 18 having a spliced end 20 which when connected to a tractor output drive rotates shaft 14.
  • a universal joint of known construction which as shown comprises two portions 16, 18, portion 18 having a spliced end 20 which when connected to a tractor output drive rotates shaft 14.
  • Such universal joints are well known and will not therefore be described further.
  • the cover 10, 12 is provided with a bearing surface 22 for co-operation with a bearing ring 24 mounted on shaft 14.
  • Bearing surface 22 is formed as a circumferential slot in the funnel-shaped member 10.
  • Bearing ring 24 is preferably initially provided separately to shaft 14 and comprises an annulus which is sized to fit the diameter of shaft 14 on its inner circumference and sized to fit the diameter of the circumferential slot 22 on its outer diameter.
  • annulus 24 By providing a series of sizes of annul; 24 of various thicknesses shafts 14 of different sizes can be fitted with the same size of cover having the same diameter of circumferential slow 22.
  • a collar 26 can be provided which abuts portion 16 of the universal joint and thereby annulus 24 can be welded in position in an accurate manner.
  • the bearing joint 22, 24 is preferably held in position by a clamping ring 28 comprising a jubilee type clip.
  • the design of the internal surface of the cover includes a lead in edge 30 which assists in initial positioning of the slot 22 over the ring 24. Once snapped into position the cover 10, 12 is prevented from further movement in the direction A by a large shoulder 32 and from movement in direction B by a smaller shoulder 34. Movement in direction A even when the component parts are partially worn is virtually impossible and movement in direction B is difficult to achieve because of the positive snap over action of shoulder 34.
  • bearing surfaces 22, 24 may be separated by ball races set for example into slot 22 as diagrammatically indicated by ball bearing 40 but this is not necessary in many applications.
  • any suitable heavy grade industrial plastics material may be used to construct the parts 10. 12 etc of the cover.
  • the cover or parts thereof could be made from a heavy duty rubber or even of metal.
  • the design provides a cover system which may be made in a standard size or limited number of standard sizes and by selection of the annulus 24 may be fitted into any diameter of shaft 14.
  • the snap over method of connection provides positive location of the two bearing surfaces22, 24.
  • a modified embodimernt is shown in the inset which shows in greater detail the components within datted line 50.
  • the outer ring 52 of substantially rounded as shown at 54 and 56. Rounding 56 allows easier positioning of slot 22 over ring 24, which is important because in cold conditions the heavy grade industrial plastics material from which funnel shaped number 10 is preferably made is not very pliable.
  • Rounding 54 allows, albeit with extreme force, the possibilit3' of separating funnel shaped member 10 from ring 24, by insertion of appropriate levers between ring 24 and member 10 at points indicated by arrow 58, after substantial loosening of clamping ring 28. This allows access to components 16, 18 should damage occur to for example one of the hinge pins 16', 18' (only 16' shown). Thus while with clamping ring 28 fully tightened it will still be impossible to separate member 10 from ring 24 (unless one or other component part is broken. the rounding 54 allows possible repairs to components 16, 18.

Abstract

Le couvercle d'extrémité d'un système de protection d'une prise de force est maintenu par une couronne d'appui qui est fixée en permanence à l'arbre et qui coopère avec une fente circonférentielle pratiquée dans la surface interne du couvercle d'extrémité. Une bague de serrage est de préférence prévue pour assurer une plus grande sécurité.
PCT/GB1989/000011 1988-01-08 1989-01-06 Systeme de couvercle pour arbre de prise de force WO1989006325A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888800380A GB8800380D0 (en) 1988-01-08 1988-01-08 Power take off shaft cover system
GB8800380 1988-01-08

Publications (1)

Publication Number Publication Date
WO1989006325A1 true WO1989006325A1 (fr) 1989-07-13

Family

ID=10629668

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000011 WO1989006325A1 (fr) 1988-01-08 1989-01-06 Systeme de couvercle pour arbre de prise de force

Country Status (3)

Country Link
AU (1) AU2933689A (fr)
GB (2) GB8800380D0 (fr)
WO (1) WO1989006325A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611896A1 (fr) * 1993-02-17 1994-08-24 Agritrans B.V. Tige d'accouplement
AU2005202533B1 (en) * 2005-06-09 2006-03-09 Allan Bare Safety Guard for Power Take Off

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2112739A5 (fr) * 1970-11-06 1972-06-23 Glaenzer Spicer Sa
FR2172580A5 (fr) * 1972-02-18 1973-09-28 Glaenzer Spicer Sa
DE3604670A1 (de) * 1985-02-15 1986-08-21 GKN Automotive Components Inc., Southfield, Mich. Element zum abdichten von verschiebegelenken

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088954A (en) * 1963-07-10 1967-10-25 Rubery Owen & Company Ltd Improvements to power take-off couplings
JPS631058Y2 (fr) * 1980-03-11 1988-01-12
DE3026062C2 (de) * 1980-07-10 1982-05-13 Jean Walterscheid Gmbh, 5204 Lohmar Schutzvorrichtung für eine Gelenkwelle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2112739A5 (fr) * 1970-11-06 1972-06-23 Glaenzer Spicer Sa
FR2172580A5 (fr) * 1972-02-18 1973-09-28 Glaenzer Spicer Sa
DE3604670A1 (de) * 1985-02-15 1986-08-21 GKN Automotive Components Inc., Southfield, Mich. Element zum abdichten von verschiebegelenken

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611896A1 (fr) * 1993-02-17 1994-08-24 Agritrans B.V. Tige d'accouplement
US5582547A (en) * 1993-02-17 1996-12-10 Agritrans B.V. Coupling shaft having a protective cover with a locking member
AU2005202533B1 (en) * 2005-06-09 2006-03-09 Allan Bare Safety Guard for Power Take Off

Also Published As

Publication number Publication date
GB2213548A (en) 1989-08-16
AU2933689A (en) 1989-08-01
GB2213548B (en) 1991-12-11
GB8800380D0 (en) 1988-02-10
GB8900216D0 (en) 1989-03-08

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