DE2349893A1 - Spur gear profile with evolute shape - has two spherical contact surfaces one concave and other convex - Google Patents

Spur gear profile with evolute shape - has two spherical contact surfaces one concave and other convex

Info

Publication number
DE2349893A1
DE2349893A1 DE19732349893 DE2349893A DE2349893A1 DE 2349893 A1 DE2349893 A1 DE 2349893A1 DE 19732349893 DE19732349893 DE 19732349893 DE 2349893 A DE2349893 A DE 2349893A DE 2349893 A1 DE2349893 A1 DE 2349893A1
Authority
DE
Germany
Prior art keywords
teeth
convex
concave
spur gear
contact surfaces
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.)
Pending
Application number
DE19732349893
Other languages
German (de)
Inventor
Reinhard Rieger
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to DE19732349893 priority Critical patent/DE2349893A1/en
Publication of DE2349893A1 publication Critical patent/DE2349893A1/en
Pending 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H55/0806—Involute profile
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H55/0886—Profiling with corrections along the width, e.g. flank width crowning for better load distribution

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

The intention of the design is to reduce tooth interference thereby minimizing wear and loss of power. There is also an improved load capacity since a large proportion of the contact surface between the teeth is in fact in contact when throughout the period of load application. consequently a smaller gearwheel can be used with consequent reduction in weight and manufacturing cost. The spherical curvature of the teeth runs along the teeth and the radius of curvature on each face can be quite similar where there is a little play in the shaft and fine tolerances. Where there is play and the tolerances are larger a sharper curve is required on the convex surface than on the concave surface. The gear can be machined using normal machine tools.

Description

ZAHNRADFA3RIX FRIEDRICHSHAFEN Aktiengesellschaft
FriedrichshafenGEAR FA3RIX FRIEDRICHSHAFEN Aktiengesellschaft
Friedrichshafen

StirnradverzahnungSpur gear teeth

Die Erfindung betrifft eine Stirnradverzahnung mit Evolventenprofil und längsballigen Zahnflanken.The invention relates to spur gear teeth with an involute profile and longitudinally crowned tooth flanks.

Es ist allgemein bekannt, die Flanken von Stirnrädern längsballig auszuführen, um ein Kantentragen zu vermeiden.It is generally known to make the flanks of spur gears longitudinally crowned in order to avoid edge wear.

Daraus ergibt sich jedoch eine Verringerung der Tragfähigkeit, da unter Last nur ein Teil der Radbreite zum Tragen kommt.However, this results in a reduction in the load-bearing capacity, since only part of the wheel width can be carried under load comes.

Die Aufgabe der Erfindung besteht darin, die Tragfähigkeit von Stirnradverzahnungen mit Längsballigkeit zu verbessern.The object of the invention is to improve the load-bearing capacity of spur gear teeth with longitudinal crowning.

Diese Aufgabe wird durch das im Kennzeichen des Patentanspruchs 1 angegebene Merkmal gelöst. Durch die erfindungsgemäße Ausbildung der Zahnflanken bleibt der Vorteil der Längsballigkeit erhalten und zusätzlich wird die Tragfähigkeit durch die größere Berührungsfläche bei Vollast beträchtlich erhöht. Die Radbreite kann daher kleiner gewählt werden, woraus sich eine Einsparung an Gewicht und Herstellungskosten ergibt.This task is achieved by the characterizing part of the claim 1 specified feature solved. Due to the inventive design of the tooth flanks, the advantage of longitudinal crowning remains and in addition, the load capacity is considerably increased by the larger contact area at full load. The wheel width can therefore be chosen to be smaller, which means results in a saving in weight and manufacturing costs.

509815/0248509815/0248

Die Zeichnung zeigt ein Ausfi'hrungsbeispiel der Erfindung anhand eines durch die Verzahnung eines Radpaares geführten Teilschnitts. Hierbei gehören die Zähne 1 zu dem einen und die Zähne 2 zu dem anderen Zahnrad. Von jeweils zwei sich berührenden Flanken A und B ist die eine konvex und die andere konkav ballig ausgeführt, wobei die Balligkeit an beiden Planken gleich groß ist. Diese Zahnflankervmodlfizierung eignet sich zum Eliminieren von relativ kleinen Wellendurchbiegungen und Pertigungstoleranzen. PfIr den Ausgleich größerer Achsrichtungstoleranzen muß die Konvexflanke eine stärkere Krümmung aufweisen als die Konkavflanke. Die Größe der Balligkeit kann aus Wellendurchbiegung und Radbreite abgeleitet werden.The drawing shows an exemplary embodiment of the invention based on a partial section through the toothing of a pair of wheels. Here the teeth 1 belong to the one and the teeth 2 to the other gear. Of every two touching Flanks A and B, one is convex and the other is concave and convex, with the convexity on both Planken is the same size. This tooth flank nerve modification is suitable for eliminating relatively small shaft deflections and manufacturing tolerances. PfIr the balance larger Axial direction tolerances, the convex flank must have a greater curvature than the concave flank. The size of the crown can be derived from shaft deflection and gear width.

Die Bearbeitung der Flanken erfolgt auf üblichen Zahnflanken- Schleifmaschinen mit Korrektureinrichtung für Längsballigkeit. The flanks are machined on the usual tooth flank Grinding machines with correction device for longitudinal crowning.

26.9.1973
Fr/RiSeptember 26, 1973
Fri / Ri

509815/0248509815/0248

Claims (1)

Patentanspruch :Claim: Stirnradverzahnung mit Evolventenprofil und längsballigen Zahnflanken, dadurch gekennzeichnet, daß von je zwei sich berührenden Planken (A, B) die eine konvex und die andere konkav ballig ist.Spur gear teeth with involute profile and longitudinal crowns Tooth flanks, characterized in that of two touching planks (A, B) one is convex and one the other is concave. 26.9.1973
Pr/RiSeptember 26, 1973
Pr / Ri 509 8 15/02509 8 15/02 LeerseiteBlank page
DE19732349893 1973-10-04 1973-10-04 Spur gear profile with evolute shape - has two spherical contact surfaces one concave and other convex Pending DE2349893A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732349893 DE2349893A1 (en) 1973-10-04 1973-10-04 Spur gear profile with evolute shape - has two spherical contact surfaces one concave and other convex

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732349893 DE2349893A1 (en) 1973-10-04 1973-10-04 Spur gear profile with evolute shape - has two spherical contact surfaces one concave and other convex

Publications (1)

Publication Number Publication Date
DE2349893A1 true DE2349893A1 (en) 1975-04-10

Family

ID=5894534

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732349893 Pending DE2349893A1 (en) 1973-10-04 1973-10-04 Spur gear profile with evolute shape - has two spherical contact surfaces one concave and other convex

Country Status (1)

Country Link
DE (1) DE2349893A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003029694A1 (en) * 2002-08-21 2003-04-10 Zahnradfabrik Friedrichshafen Toothed wheel gear
DE102019106999A1 (en) * 2019-03-19 2020-09-24 Rolls-Royce Deutschland Ltd & Co Kg Spur gear and planetary gear with such a spur gear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148400A1 (en) * 2001-09-29 2003-04-24 Zahnradfabrik Friedrichshafen Toothed wheel gear used in spur toothing, spiral gearing, internal or external toothing, cylinder or bevel gears, contrate gears, or planet wheel gears comprises a first/second component with teeth having corresponding tooth flank gradients
WO2003029694A1 (en) * 2002-08-21 2003-04-10 Zahnradfabrik Friedrichshafen Toothed wheel gear
DE102019106999A1 (en) * 2019-03-19 2020-09-24 Rolls-Royce Deutschland Ltd & Co Kg Spur gear and planetary gear with such a spur gear

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