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
  • F16D3/26—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
  • F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member
• • 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
  • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
  • F16C21/005—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement the external zone of a bearing with rolling members, e.g. needles, being cup-shaped, with or without a separate thrust-bearing disc or ring, e.g. for universal joints
• • 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
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/72—Sealings
  • F16C33/76—Sealings of ball or roller bearings
  • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
  • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
  • F16C33/7809—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for needle roller bearings
• • 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
  • F16C2361/00—Apparatus or articles in engineering in general
  • F16C2361/41—Couplings

Definitions

• This invention relates to movable joint seals and in particular to seals as for use in universal joints and the like.
• a seal and coupling assembly for a hinge joint is illus ⁇ trated comprised of an inner sleeve member, an outer sleeve member and an intermediate elastic ring member securely maintained therebetween.
• One of the sleeves is press-fitted onto a track pin and the other of the sleeves is press-fitted into a track link with the seal being adapted to permit limited pivotal movement along the longitudinal axis of the pin.
• the present invention comprehends an im ⁇ proved universal joint seal formed of an elastic seal ring captured between first and second right cir ⁇ cularly cylindrical annular sleeves bonded to diametri ⁇ cally opposite portions thereof.
• the sleeves place the seal ring under compressive stress and are arranged to be press-fitted into the confronting portions of the universal joint structure.
• the angular surfaces abutted by the sleeves are disposed right angularly to each other.
• One of the universal joint elements may be provided with a recess having an inner portion defining a surface against which one of the sleeves abuts, the width of the recess being preselected to have the ends of the sleeve in abutment there- with to prevent axial movement of the sleeve.
• the universal joint seal journaled trunnion may be provided with an annular collar defining the recess.
• the seal ring is formed of rubber and the sleeves are formed of rigid metal.
• the universal joint seal structure of the present invention is extremely simple and economical of construction while yet. providing an improved lubricant retaining means and means for preventing ingress of foreign matter into the universal joint bearing structure.
• FIGURE 1 is a fragmentary diametric section of a universal joint structure provided with an improved seal assembly embodying the invention.
• FIGURE 2 is a fragmentary diametric section similar to that of Figure 1 but illustrating a mod- ified form of seal embodying the invention.
• an improved seal gener ⁇ ally designated 10 is shown for use in a universal joint generally designated 11 having a journal trunnion 12 and an annular bearing means generally designated 13 received in an annular bearing cap retainer 14.
• the journal trunnion 12 defines a rotation axis 15.
• the distal end 16 of the journal trunnion may be provided with an annular collar 17 spaced from the end surface 18 thereof.
• the cap retainer 14 embraces the distal end 16 with the bearing assembly 13 disposed between the cylindrical side ⁇ wall 19 of the cap retainer and the periphery 20 of the journal trunnion portion 16.
• the cap re ⁇ tainer may be press-fitted into the cross portion
• the bearing means 13 which, in the illustrated embodiment, comprises a plurality of needle bearings
• seal 10 is provided to effect such desirable retention of the lubricant and prevent entry of dirt and other foreign matter into the bearing.
• the present invention comprehends an improved seal 10 having an elastic seal ring 23 and diametrically opposed, right circularly cylindrical annular sleeves 24 and 25 bonded to diametrically opposite portions of the seal ring.
• the inner diameter of the first sleeve 24 and the outer diameter of the second sleeve 25 are preselected to provide a desired preloading of the seal ring 23, as illustrated in Figure 1.
• Sleeve 24 is press-fitted into a notch 26 in the outer end of retainer portion 19, and sleeve 25 is press-fitted onto the cylindrical surface 20 of the journal trunnion portion 16.
• sleeve 25 may define means for retaining the needle bearings 22 against axial displacement in the operation of the universal joint by the abutment of the sleeve with the collar 17 and the inner end of the bearings 22.
• the outer sleeve 24 may be captured between the collar outer surface 29 and the radial surface 27 at the outer end of the recess 26.
• a space 28 is provided between the inner end of the needle bearings 22 and the seal ring 23 so as to prevent wear and assure long troublefree life of the seal means.
• the seal means 10 further provides improved troublefree life in the arrangement which eliminates sliding surfaces between the seal ring 23 and the confronting portions of the joint.
• the seal means provides for limited axial endplay of the journal trunnion without adversely affecting the sealing effect of ring 23. As the seal ring is bonded to the sleeves 24 and 25, the seal ring effectively eliminates wearing surfaces relative to such axial play of the journal trunnion.
• a modified form of seal generally designated 110 is shown to comprise a seal generally similar to that of seal 10 but wherein the sleeves 124 and 125 are disposed perpendicularly to the arrangement of seal 10. More specifically, sleeve 124 is disposed at the diametric outer portion of the seal ring 123 and sleeve 125 is disposed at the diametric inner portions thereof. Thus, the seal ring 123 is cap ⁇ tured therebetween ' so as to have sealing engage ⁇ ment with the cylindrical surface of the recess 126 and sleeve 124 is urged against the outer annular surface 127 of the recess.
• sleeve 124- serves as means for retaining the needle bearings 122 against axial displacement.
• Collar 117 of the joint assembly 111 of Figure 2 is provided with an annular recess 129 which receives the sleeve 125.
• the radially outer cylindrical surface 130 and the radially inner surface 131 of the recess 129 are dimensioned so as to have abutment by the inner and outer surfaces of the sleeve 125, thereby effectively retaining sleeve 125 against displacement in the collar.
• the outer surface of the sleeve 124 has a diameter preselected to be press-fitted in the recess 126 and the inner diameter of the sleeve 124 is pre- selected to be press-fitted onto the surface 120 of the journal trunnion portion 116.
• seal 110 is . similar to seal 10 except for the modified arrangement thereof as dis ⁇ cussed above.
• the seal functions in a similar manner in providing an improved retention of lubricant in the bearing space while preventing entry of foreign matter thereinto.
• the seal ring 123 effectively seals between the retainer recess por- tion 126 and the journal trunnion surface 120 to provide the desirable lubricant retention ana for ⁇ eign matter ingress protection.
• the improved seal of the present invention is adapted for use in universal joints providing a substantial improvement and troublefree long life over prior art structures utilizing lip and O-ring seal.
• the seal may be provided in the form of a cartridge having preselected preload and adapted for facilitated press fit into the universal joint structure as discussed above.
• This seal provides improved long troublefree life in permitting limited axial movement without surface movement of the seal ring relative to the sleeves bonded thereto.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sealing Devices (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22147520

Family Applications (1)

Country Status (3)

Cited By (4)

Families Citing this family (1)

Citations (7)

Family Cites Families (1)

• 1979
  • 1979-02-26 WO PCT/US1979/000111 patent/WO1980001827A1/en unknown
  • 1979-02-26 JP JP50145979A patent/JPS56500184A/ja active Pending
• 1980
  • 1980-09-10 EP EP19790901120 patent/EP0024386A4/de not_active Withdrawn

Patent Citations (7)

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