FR2334024A1 - Tooth form for infinitely variable ratio gearboxes - has convex section shape to smooth speed changes and extend life - Google Patents

Tooth form for infinitely variable ratio gearboxes - has convex section shape to smooth speed changes and extend life

Info

Publication number
FR2334024A1
FR2334024A1 FR7537055A FR7537055A FR2334024A1 FR 2334024 A1 FR2334024 A1 FR 2334024A1 FR 7537055 A FR7537055 A FR 7537055A FR 7537055 A FR7537055 A FR 7537055A FR 2334024 A1 FR2334024 A1 FR 2334024A1
Authority
FR
France
Prior art keywords
discs
teeth
infinitely variable
speed changes
rings
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.)
Granted
Application number
FR7537055A
Other languages
French (fr)
Other versions
FR2334024B1 (en
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.)
Automobiles Citroen SA
Original Assignee
Automobiles Citroen SA
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 Automobiles Citroen SA filed Critical Automobiles Citroen SA
Priority to FR7537055A priority Critical patent/FR2334024A1/en
Publication of FR2334024A1 publication Critical patent/FR2334024A1/en
Application granted granted Critical
Publication of FR2334024B1 publication Critical patent/FR2334024B1/fr
Granted legal-status Critical Current

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
    • 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
    • F16D3/18—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts (1) having slidably-interengaging teeth
    • F16D3/185—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts (1) having slidably-interengaging teeth radial teeth connecting concentric inner and outer coupling parts

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

Modification of the tooth form in this design infinitely variable gearbox extends the life, increases smoothness of operation and reduces noise of the transmission. The speed change mechanism is of the type where a pile of discs (9) may slide axially on a shaft (10), rotation being prevented by teeth (13) registering in splines (11) on the shaft. The flanks of the teeth (8, 13) on the discs (9) and rings (2) are shaped so that in section they form an obtuse angle down the centre of the tooth face, convex outwards. Preferably the angle is of order 172 deg. and allows a rocking motion of the discs and rings relative to the shaft axes during speed changes. This additional freedom eases the axial sliding of the discs and rings on the splines. It is alos advantageous to chamfer (16) the top edges of the teeth and arrange for the top face to have a slight angle of order 4 deg to the axial direction.
FR7537055A 1975-12-03 1975-12-03 Tooth form for infinitely variable ratio gearboxes - has convex section shape to smooth speed changes and extend life Granted FR2334024A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7537055A FR2334024A1 (en) 1975-12-03 1975-12-03 Tooth form for infinitely variable ratio gearboxes - has convex section shape to smooth speed changes and extend life

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7537055A FR2334024A1 (en) 1975-12-03 1975-12-03 Tooth form for infinitely variable ratio gearboxes - has convex section shape to smooth speed changes and extend life

Publications (2)

Publication Number Publication Date
FR2334024A1 true FR2334024A1 (en) 1977-07-01
FR2334024B1 FR2334024B1 (en) 1978-05-12

Family

ID=9163287

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7537055A Granted FR2334024A1 (en) 1975-12-03 1975-12-03 Tooth form for infinitely variable ratio gearboxes - has convex section shape to smooth speed changes and extend life

Country Status (1)

Country Link
FR (1) FR2334024A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406750A1 (en) * 1977-10-18 1979-05-18 Fachini Spa Ing V Gear coupling allowing universal movement - has flanged half with convex internal and hub half with straight external teeth

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406750A1 (en) * 1977-10-18 1979-05-18 Fachini Spa Ing V Gear coupling allowing universal movement - has flanged half with convex internal and hub half with straight external teeth

Also Published As

Publication number Publication date
FR2334024B1 (en) 1978-05-12

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Legal Events

Date Code Title Description
ST Notification of lapse