US3884536A - Protective guard device for a transmission shaft - Google Patents

Protective guard device for a transmission shaft Download PDF

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Publication number
US3884536A
US3884536A US478314A US47831474A US3884536A US 3884536 A US3884536 A US 3884536A US 478314 A US478314 A US 478314A US 47831474 A US47831474 A US 47831474A US 3884536 A US3884536 A US 3884536A
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US
United States
Prior art keywords
bearing member
transmission shaft
guard device
bearing
protective guard
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.)
Expired - Lifetime
Application number
US478314A
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English (en)
Inventor
Theo Buthe
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.)
Walterscheid GmbH
Original Assignee
GKN Walterscheid GmbH
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 Walterscheid GmbH filed Critical GKN Walterscheid GmbH
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Publication of US3884536A publication Critical patent/US3884536A/en
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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
    • F16D3/16—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
    • F16D3/382—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 constructional details of other than the intermediate member
    • F16D3/387—Fork construction; Mounting of fork on shaft; Adapting shaft for mounting of fork
    • 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
    • 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
    • F16P1/04—Screens or hoods rotating with rotary shafts

Definitions

  • PROTECTIVE GUARD DEVICE FOR A TRANSMISSION SHAFT [75] Inventor: Theo Buthe, Lohmar, Rhine,
  • a protective guard device for a transmission shaft includes a tubular guard member enclosing the transmission shaft and conical guard members at the ends of the tubular member extending over the yoke arms.
  • a radially expandible bearing member is seated in an an nular groove formed in either end of the shaft or in a portion of the adjoining yoke arm.
  • a connector interconnects the end of the tubular member to a conical guard member and the connector has a cylindrical surface therein which defines a fitting step having a diameter corresponding to the outer diameter of the bearing member when it is expanded. The bearing member when it is expanded is freely slidable over that portion of the transmission shaft assembly having the annular groove and is then contracted to be seated within the groove.
  • the present invention relates to a protective guard device for a transmission shaft having yoke arms at each end thereof, more particularly, to a connector for interconnecting each end of a tubular guard member enclosing the shaft to a respective conical guard member extending over a yoke arm.
  • a protective guard device which comprises two telescopingly engaging tubular members with the guard device being supported with respect to the transmission shaft by means of one piece slit annular bearing members seated in a groove on the shaft or on an extension of the respective yoke arm.
  • the bearing member is generally retained in a connector having a stepped configuration which functions to interconnect the tubular guard member with a conical guard member extending over the yoke arm and possibly over the joint connected to the yoke arm.
  • an extension of the transmission shaft is provided with an annular groove in which is seated a tubular bearing member having a plurality of bearing segments.
  • the segments are resilient in a radial direction to facilitate accessibility of the joints during assembly and disassembly of the transmission shaft and for maintenance and service purposes (German patent specification No. 1,188,869).
  • the protective conical guard member, the bearing member and the tubular members can be jointly removed in the axial direction without the use of tools. Since the tubular guard members are retained in position only by the resilient force exerted by the bearing member segments they can be very readily slidingly displaced from their operative positions. This characteristic is contradicty to existing regulations for the prevention of accidents which provides that such protective guard devices must not be readily removable from the shaft being protected.
  • a further disadvantage of this protective guard device is that in removing the guard device the bearing members are removed from their annular grooves and are therefore susceptible to damage and in fact are damaged in the course of frequent repeated fittings and removals. Such damage may affect adversely running conditions.
  • a protective guard device In another form of a protective guard device the conical or funnel shaped guard member extending over the yoke arm is made in one piece together with the bearing member. Bearing segments are mounted on lugs or tongues and are resilient in the radial direction. After the bearing segments have been seated into the annular grooves, radial expansion of the bearing member and thus displacement of this member is prevented by a guard tube which is slid over the bearing member. (German OS 1 930 278)
  • This guard device has the disadvantage that one must first remove the guard tube and then the conical guard member with the bearing segments in order to gain access to the yoke arms and joint members. As in the abovementioned structure of a guard device this removal may cause damage to the bearing segments.
  • a further disadvantage is that since the conical member and bearing member are made as a unit it is necessary to fabricate this structure from a plastic material which is suitable for a bearing function. This necessity significantly increases the manufacturing cost of the entire guard device.
  • a further from of a protective guard device is shown in U.S. Pat. No. 3,194,615 wherein a radially slit bearing member is expanded and pushed over the transmis-' sion shaft extension prior to the assembly of the guard device.
  • the ring is intended to be seated in a correspondingly shaped annular groove on the transmission shaft slide bearing.
  • the conical guard member and the tubular guard member are originally interconnected into a single unit and are pushed over the transmission shaft in a direction toward the joint. This unit engages with the side wall of the slide bearing ring member by means of a spring ring which limits anial displacement.
  • the peripheral surface of the ring engages with a corresponding cylindrically shaped inner surface of the conical guard member.
  • the conical guard member is provided with an opening above the side wall of the slide bearing ring to permit a radially resilient spring clip or washer to be inserted therethr ough.
  • This clip or washer is supported on one side from the side wall of the slide bearing ring and on the otherside along with the opposite side wall thereof from the inner wall of the conical guard member. This construction prevents any axial displacment of the conical and tubular guard members.
  • Such a structure is significantly higher in cost since the cost of a roller bearing is greater than that of a bearing member made of plastic material and having slide-bearing segments. Further, after the guard device has been pushed into position, it is locked against axial displacement by fitting a tension strap.
  • the protective guard device for transmission shaft assembly comprising a transmission shaft having yoke arms on the ends thereof may comprise tubular guard means enclosing the transmission shaft.
  • tubular guard means enclosing the transmission shaft.
  • a radially expandible bearing member for each groove is freely slidable over the portion of the transmission shaft assembly having the annular groove therein when in the expanded position and when contatcted is seated into the respective groove.
  • Conical guard members are provided at the ends of the tubular means extending over the respective yoke arms and are interconnected by connectors to the respective ends of the tubular means.
  • Each connector comprises a locking lug which is engageable with the tubular guard means.
  • Each connector has a cylindrical surface therein which defines a fitting step having a diameter approximately equal to the outer diameter of the bearing member when in the expanded position.
  • the protective guard device of the present invention is so constructed that a tubular guard member and conical guard member may be removed or assembled onto the transmission shaft in a single operation.
  • the bearing member is constructed initially so that in its expanded condition it engages with the inner cylindrical surface the protective guard device consisting of the funnel guard member with the bearing member, connector and tubular guard member can be axially assembled in a single step or operation.
  • the bearing member is expanded only sufficiently to slide freely over the structure in which the annular groove is formed.
  • FIG. 1 is an elevational view partially in longitudinal section of the protective guard device according to the present invention illustrated in the fitting or assembling position;
  • FIG. 2 is similar to that of FIG. 1 but showing the protective guard device in its operative or assembled position;
  • FIG. 3 is an elevational view of the connector and bearing member viewed in the direction of the line A-A;
  • FIG. 4 is a plane view of the bearing member.
  • a bearing member 1 is made of a synthetic plastic bearing material and has the shape of a one-piece sliding ring having a radial cut or slit 2.
  • bearing member 1 Along the inner circumference of bearing member 1 are a plurality of circumferentially spaced bearing segments 3 which are shaped to fit closely within an annular groove 4 formed in a transmission shaft 6 to function as a slide bearing.
  • the end surface of the bearing member 1 facing the yoke arm rests against a shoulder or flange 5 formed on the yoke arm 6a and extending perpendicularly to the axis of the transmission shaft 6.
  • bearing member 1 directed toward the transmission shaft 6 engages a surface 5a which is perpendicular to the transmission. shaft axis and which together with flange 5 defines the annular groove 4. When the bearing member 1 is thus seated in the groove 4 it is incapable of axial displacement.
  • the bearing member 1 is provided with an inclined surface 8 which tapers or drops in the direction toward a tubular guard member 15 which encloses the transmission shaft 6.
  • the inclined surface 8 permits the sliding fitting or mounting of resilient retaining lugs 9 on a connector 10 during the locking operation.
  • the tubular guard member 15 illustrated may be only one part of a tubular guard which may consist of two telescopingly engageable tubular members.
  • the connector 10 is provided with an inner cylindrical surface 10a which defines a fitting step and has an inclined surface 8a extending downwardly therefrom in the direction toward the transmission shaft 6.
  • the resilient retaining lugs 9 on the connector 10 have projections 11 which engage in an annular groove 12 formed in the outer peripherial surface of the bearing member 1.
  • reinforcement tabs 13 On the outer surface of the retaining lugs 9 there are provided reinforcement tabs 13 having slits or recesses 14 at their lower ends adapted to receive a screwdriver blade for the purpose of disengaging the retaining lugs 9 from the bearing member 1 through lever action.
  • the connector 10 is also provided with a plurality of resilient locking lugs 10b which engage with suitable openings in the tubular guard member 15 to engage lockingly the connector 10 with the tubular guard member.
  • the bearing segments 3 in cross-section are provided with one end forming a radial surface 7 and then extending in a curved configuration outwardly in the direction toward the yoke arm 6a to conform to the curved section 7a of groove 4.
  • the bearing member 1 is fabricated so that its initial or normal position is expanded to a diameter which corresponds to the inner diameter of the fitting step 10a.
  • the bearing member may also be constructed so that its initial diameter corresponds to the internal diameter of the locking lugs 10b and is maintained in its expanded position by a latch element provided on the inner surface of the fitting step 100.
  • the expanded bearing member 1 is engaged firmly within the cylindrical surface 10a of the connector and then moved axially into the operative position together with the conical guard member 16,
  • the bearing member 1 is moved axially therewith until its end surface engages the shoulder 5 on the yoke arm 6a.
  • the bearing member 1 is then stopped from further axial movement and the continued axial movement of the connector 10 causes the inclined surfaces 8 and 8a to mutually engage and to earn the bearing member 1 inwardly until it is seated into the groove into the position as shown in FIG. 2.Continued movement to the left as viewed in the drawings will enable the locking lugs 9 to become seated in the groove 12 to retain the guard assembly in position.
  • the present invention has disclosed a protective guard assembly for rotating transmission shafts which can be readily assembled or disassembled with a minimum of effort and without the requirement of any special tools. Further, repeated assembly or removal of the protective guard structure will not affect adversely the bearing surfaces of the bearing member since the bearing member remains seated in the bearing groove during subsequent assembly or disassembly of the guard members.
  • a protective guard device for a transmission shaft assembly comprising a transmission shaft having yoke arms on the ends thereof and comprising tubular guard means enclosing the transmission shaft, there being annular grooves in said transmission shaft assembly at the junctures of the transmission shaft and the yoke arms, a radially expandible bearing member for each groove freely slidable over the portion of the transmission shaft assembly having the annular grooves therein when in the expanded position and when contracted seated into the respective groove, conical guard members at the ends of said tubular guard means extending over the re spective yoke arms, connectors interconnecting said conical guard members to the respective ends of said tubular guard means and each having a locking lug engageable with said tubular means, said connectors each having a cylindrical surface therein defining a fitting step having a diameter approximately equal to the outer diameter of the bearing member when in the expanded position.
  • each of said bearing members having a plurality of inner circumferentially spaced bearing segments which seat into a said groove, said bearing members being secured against axial movement when seated in a groove.
  • a protective guard device as claimed in claim 1 wherein there is an external annular groove in said bearing member, and resilient retaining lugs on each of said connectors engageable with said bearing member grooves.
  • each of said bearing segments in cross-section has one end curving outwardly in the direction of the respective yoke arm and the other end is perpendicular to the axis of the bearing member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • General Details Of Gearings (AREA)
  • Motor Power Transmission Devices (AREA)
  • Flexible Shafts (AREA)
  • Sliding-Contact Bearings (AREA)
US478314A 1973-05-30 1974-06-11 Protective guard device for a transmission shaft Expired - Lifetime US3884536A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2327482A DE2327482C2 (de) 1973-05-30 1973-05-30 Schutzvorrichtung für Gelenkwellen

Publications (1)

Publication Number Publication Date
US3884536A true US3884536A (en) 1975-05-20

Family

ID=5882539

Family Applications (1)

Application Number Title Priority Date Filing Date
US478314A Expired - Lifetime US3884536A (en) 1973-05-30 1974-06-11 Protective guard device for a transmission shaft

Country Status (13)

Country Link
US (1) US3884536A (es)
JP (1) JPS5320610B2 (es)
AT (1) AT328803B (es)
BR (1) BR7404098D0 (es)
CH (1) CH577121A5 (es)
DE (1) DE2327482C2 (es)
DK (1) DK134731C (es)
ES (1) ES425297A1 (es)
FR (1) FR2231887B1 (es)
GB (1) GB1433077A (es)
HU (1) HU169420B (es)
IT (1) IT1013680B (es)
NL (1) NL169215C (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092669A1 (en) * 1982-04-25 1983-11-02 Rockwell International Corporation Power takeoff yoke shielding and engaging means
US4747804A (en) * 1984-03-01 1988-05-31 Benzi & Di Terlizzi S.N.C. Protector for universal joints
US5173082A (en) * 1990-06-22 1992-12-22 Edi Bondioli Telescopic protective casing for a transmission shaft with lubrication distribution system
US5800271A (en) * 1995-11-08 1998-09-01 Gkn Walterscheid Gmbh Protective device for driveshafts having a removable protective cone
US6354953B1 (en) * 1998-08-29 2002-03-12 Gkn Walterscheid Gmbh Bearing ring for supporting a protective device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230542U (es) * 1975-08-26 1977-03-03
JPS5270250U (es) * 1975-11-19 1977-05-25
JPS5548891Y2 (es) * 1976-07-14 1980-11-14
IT1167912B (it) * 1981-06-05 1987-05-20 Edi Bondioli Protezione ad elementi componibili per alberi di trasmissione cardanici
IT1167944B (it) * 1981-07-14 1987-05-20 Edi Bondioli Dispositivo di protezione della forcella di estremita' di un albero cardanico di trasmissione per macchine agricole ed altro
FR2550833A2 (fr) * 1983-04-27 1985-02-22 Slym Perfectionnements apportes aux dispositifs de protection recouvrant les arbres de transmission a cardan
DE3522011A1 (de) * 1985-06-20 1987-01-02 Wabco Westinghouse Steuerung Lagerbuchse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194615A (en) * 1962-07-03 1965-07-13 Anthony V Weasler Shaft organization
US3531077A (en) * 1969-04-07 1970-09-29 Clifford J Trottier Bearing assembly for a swing structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194615A (en) * 1962-07-03 1965-07-13 Anthony V Weasler Shaft organization
US3531077A (en) * 1969-04-07 1970-09-29 Clifford J Trottier Bearing assembly for a swing structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092669A1 (en) * 1982-04-25 1983-11-02 Rockwell International Corporation Power takeoff yoke shielding and engaging means
US4747804A (en) * 1984-03-01 1988-05-31 Benzi & Di Terlizzi S.N.C. Protector for universal joints
US5173082A (en) * 1990-06-22 1992-12-22 Edi Bondioli Telescopic protective casing for a transmission shaft with lubrication distribution system
US5800271A (en) * 1995-11-08 1998-09-01 Gkn Walterscheid Gmbh Protective device for driveshafts having a removable protective cone
US6354953B1 (en) * 1998-08-29 2002-03-12 Gkn Walterscheid Gmbh Bearing ring for supporting a protective device

Also Published As

Publication number Publication date
DE2327482A1 (es) 1974-01-03
NL169215B (nl) 1982-01-18
AT328803B (de) 1976-04-12
GB1433077A (en) 1976-04-22
NL169215C (nl) 1982-06-16
FR2231887B1 (es) 1976-12-17
DK134731B (da) 1977-01-10
JPS5021157A (es) 1975-03-06
HU169420B (es) 1976-11-28
FR2231887A1 (es) 1974-12-27
DK287374A (es) 1975-01-13
DE2327482B1 (de) 1974-01-03
IT1013680B (it) 1977-03-30
NL7406000A (es) 1974-12-03
DK134731C (da) 1977-05-31
CH577121A5 (es) 1976-06-30
BR7404098D0 (pt) 1975-01-07
DE2327482C2 (de) 1974-08-08
ES425297A1 (es) 1976-05-16
JPS5320610B2 (es) 1978-06-28
ATA194274A (de) 1975-06-15

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