WO1999008023A1 - Gear pair with rolling contact - Google Patents

Gear pair with rolling contact Download PDF

Info

Publication number
WO1999008023A1
WO1999008023A1 PCT/BG1998/000012 BG9800012W WO9908023A1 WO 1999008023 A1 WO1999008023 A1 WO 1999008023A1 BG 9800012 W BG9800012 W BG 9800012W WO 9908023 A1 WO9908023 A1 WO 9908023A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
cylindrical
double
ring
gear wheels
Prior art date
Application number
PCT/BG1998/000012
Other languages
French (fr)
Inventor
Assadour Missak Tiufektchian
Original Assignee
Assadour Missak Tiufektchian
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 Assadour Missak Tiufektchian filed Critical Assadour Missak Tiufektchian
Publication of WO1999008023A1 publication Critical patent/WO1999008023A1/en

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
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/02004—Gearboxes; Mounting gearing therein the gears being positioned relative to one another by rolling members or by specially adapted surfaces on the gears, e.g. by a rolling surface with the diameter of the pitch circle

Definitions

  • the present invention relates to cylindrical gear drives with materialized pitch cylinders and it is applicable to gear type speed reducers and gear type speed multipliers.
  • pitch cylinders of a cylindrical gear drive is meant the corresponding imaginary tangent cylinders which would transmit by slideless rolling contact the same motion as the gear drive itself.
  • Cylindrical gear drive with materialized pitch cylinders comprising two double- ring gear wheels is known in the prior art.
  • Each single toothed ring of said double-ring gear wheels is meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair so that said cylindrical gear drive with materialized pitch cylinders includes two gear pairs having equal gear ratio.
  • Each of said double-ring gear wheels is shaped with a cylindrical bead disposed between the corresponding toothed rings. For each of said double-ring gear wheels the diameter of the cylindrical surface of the corresponding cylindrical bead is equal to the diameter of the corresponding pitch cylinder. Rolling contact is realized between said double-ring gear wheels through the cylindrical surfaces of the corresponding cylindrical beads.
  • a cylindrical gear drive with materialized pitch cylinders comprising two double-ring gear wheels.
  • Each single toothed ring of said double-ring gear wheels is meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair so that the proposed cylindrical gear drive with materialized pitch cylinders includes two gear pairs having equal gear ratio.
  • the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring are reciprocally equal and they are in turn equal to the diameter of the corresponding pitch cylinder.
  • the pitch cylinders of the proposed cylindrical gear drive are materialized in definite cylindrical surfaces of the corresponding toothed rings which in turn results in comparatively smaller overall dimensions of said cylindrical gear drive.
  • Fig. 1 is an axial section of the preferred embodiment.
  • Fig. 2 and Fig. 3 are transverse sections corresponding to Fig. 1.
  • Fig. 4 and Fig. 5 are side elevations of the separate double-ring gear wheels of the presented cylindrical gear drive.
  • Each single toothed ring of double-ring gear wheels 1 and 2 is meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair of internal involute gearing.
  • the corresponding toothed rings have equal number of teeth so that the presented cylindrical gear drive includes two gear pairs having equal gear ratio.
  • the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring are reciprocally equal and they are in turn equal to the diameter of the corresponding pitch cylinder.
  • the teeth of the corresponding rings have common planes of symmetry so that the total contact ratio of the presented cylindrical gear drive is greater in comparison with that of anyone of said gear pairs if taken separately.
  • the present invention can find commercial application first and foremost in the manufacture of eccentric planetary gear drives with small difference between the number of teeth of the corresponding gear wheels and with a satellite gear wheel floating in radial direction.

Abstract

Cylindrical gear drive with materialized pitch cylinders comprising two double-ring gear wheels is known in the prior art. Each of said double-ring gear wheels is shaped with a cylindrical bead with diameter of the cylindrical surface equal to that of the corresponding pitch cylinder. Rolling contact is realized between said double-ring gear wheels through the cylindrical surfaces of the corresponding cylindrical beads. It is a certain disadvantage of heretofore cylindrical gear drives with materialized pitch cylinders that they possess relatively great overall dimension in axial direction. The proposed solution to said problem is that for each of said double-ring gear wheels (1, 2) the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring should be reciprocally equal and they should be in turn equal to the diameter of the corresponding pitch cylinder so that said toothed rings of the proposed gear drive would serve the purpose of said cylindrical beads of heretofore gear drives. The present invention can find commercial application first and foremost in the manufacture of eccentric planetary gear drives with small difference between the number of teeth of the corresponding gear wheels and with a satellite gear wheel floating in radial direction.

Description

GEAR PAIR WITH ROLLING CONTACT
The present invention relates to cylindrical gear drives with materialized pitch cylinders and it is applicable to gear type speed reducers and gear type speed multipliers.
In the present description, in accordance with the standard definitions, by pitch cylinders of a cylindrical gear drive is meant the corresponding imaginary tangent cylinders which would transmit by slideless rolling contact the same motion as the gear drive itself.
Cylindrical gear drive with materialized pitch cylinders comprising two double- ring gear wheels is known in the prior art. Each single toothed ring of said double-ring gear wheels is meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair so that said cylindrical gear drive with materialized pitch cylinders includes two gear pairs having equal gear ratio. Each of said double-ring gear wheels is shaped with a cylindrical bead disposed between the corresponding toothed rings. For each of said double-ring gear wheels the diameter of the cylindrical surface of the corresponding cylindrical bead is equal to the diameter of the corresponding pitch cylinder. Rolling contact is realized between said double-ring gear wheels through the cylindrical surfaces of the corresponding cylindrical beads.
It is a certain disadvantage of heretofore cylindrical gear drives with materialized pitch cylinders that they possess relatively great overall dimension in axial direction. It is the principal object of this invention to provide a cylindrical gear drive with materialized pitch cylinders with comparatively smaller overall dimensions.
The foregoing object will be carried out by providing a cylindrical gear drive with materialized pitch cylinders comprising two double-ring gear wheels. Each single toothed ring of said double-ring gear wheels is meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair so that the proposed cylindrical gear drive with materialized pitch cylinders includes two gear pairs having equal gear ratio. For each of said double-ring gear wheels the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring are reciprocally equal and they are in turn equal to the diameter of the corresponding pitch cylinder.
The pitch cylinders of the proposed cylindrical gear drive are materialized in definite cylindrical surfaces of the corresponding toothed rings which in turn results in comparatively smaller overall dimensions of said cylindrical gear drive.
The invention is explained by reference to a preferred embodiment.
Fig. 1 is an axial section of the preferred embodiment. Fig. 2 and Fig. 3 are transverse sections corresponding to Fig. 1. Fig. 4 and Fig. 5 are side elevations of the separate double-ring gear wheels of the presented cylindrical gear drive.
Each single toothed ring of double-ring gear wheels 1 and 2 is meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair of internal involute gearing. For each of said double-ring gear wheels 1 and 2 the corresponding toothed rings have equal number of teeth so that the presented cylindrical gear drive includes two gear pairs having equal gear ratio. For each of said double-ring gear wheels 1 and 2 the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring are reciprocally equal and they are in turn equal to the diameter of the corresponding pitch cylinder. For each of said double-ring gear wheels 1 and 2 the teeth of the corresponding rings have common planes of symmetry so that the total contact ratio of the presented cylindrical gear drive is greater in comparison with that of anyone of said gear pairs if taken separately.
The present invention can find commercial application first and foremost in the manufacture of eccentric planetary gear drives with small difference between the number of teeth of the corresponding gear wheels and with a satellite gear wheel floating in radial direction.
R E F E R E N C E
1. U K Patent No 1 107 062, Int. Cl. F 16 H 1/00 .

Claims

C L A I M S
Cylindrical gear drive with materialized pitch cylinders, comprising two double- ring gear wheels (1 , 2), each single toothed ring of said double-ring gear wheels (1 , 2) being meshed with a corresponding toothed ring of the opposite gear wheel thereby forming a conjugated gear pair resulting in two gear pairs having equal gear ratio included in said cylindrical gear drive, characterized moreover by the fact that for each of said double-ring gear wheels (1 , 2) the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring are reciprocally equal and they are in turn equal to the diameter of the corresponding pitch cylinder.
PCT/BG1998/000012 1997-08-08 1998-07-30 Gear pair with rolling contact WO1999008023A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG101821 1997-08-08
BG101821A BG62902B1 (en) 1997-08-08 1997-08-08 Cylindrical gear drive with materialized initial cylinders

Publications (1)

Publication Number Publication Date
WO1999008023A1 true WO1999008023A1 (en) 1999-02-18

Family

ID=3927209

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BG1998/000012 WO1999008023A1 (en) 1997-08-08 1998-07-30 Gear pair with rolling contact

Country Status (2)

Country Link
BG (1) BG62902B1 (en)
WO (1) WO1999008023A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE409060C (en) * 1923-08-14 1925-01-30 Frankfurter Maschb Akt Ges Vor Spur gears
DE1093640B (en) * 1956-06-13 1960-11-24 Electroacustic Gmbh Gear change transmission
JPS5937363A (en) * 1982-08-24 1984-02-29 Yoshio Watanabe Spur gear
US5098358A (en) * 1987-10-16 1992-03-24 Matex Co., Ltd. Unified asymmetric planetary gear assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE409060C (en) * 1923-08-14 1925-01-30 Frankfurter Maschb Akt Ges Vor Spur gears
DE1093640B (en) * 1956-06-13 1960-11-24 Electroacustic Gmbh Gear change transmission
JPS5937363A (en) * 1982-08-24 1984-02-29 Yoshio Watanabe Spur gear
US5098358A (en) * 1987-10-16 1992-03-24 Matex Co., Ltd. Unified asymmetric planetary gear assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 140 (M - 305) 29 June 1984 (1984-06-29) *

Also Published As

Publication number Publication date
BG62902B1 (en) 2000-10-31
BG101821A (en) 1999-03-31

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