GB2144497A - Synchromesh for a gear transmission - Google Patents

Synchromesh for a gear transmission Download PDF

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Publication number
GB2144497A
GB2144497A GB8321032A GB8321032A GB2144497A GB 2144497 A GB2144497 A GB 2144497A GB 8321032 A GB8321032 A GB 8321032A GB 8321032 A GB8321032 A GB 8321032A GB 2144497 A GB2144497 A GB 2144497A
Authority
GB
United Kingdom
Prior art keywords
cone
synchronising
ring
synchromesh
friction
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
GB8321032A
Other versions
GB8321032D0 (en
GB2144497B (en
Inventor
Jurgen Rathke
Gunther Villwock
Fritz Bernau
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.)
IFA GETRIEBEWERKE BRANDENBURG
Original Assignee
IFA GETRIEBEWERKE BRANDENBURG
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 IFA GETRIEBEWERKE BRANDENBURG filed Critical IFA GETRIEBEWERKE BRANDENBURG
Publication of GB8321032D0 publication Critical patent/GB8321032D0/en
Publication of GB2144497A publication Critical patent/GB2144497A/en
Application granted granted Critical
Publication of GB2144497B publication Critical patent/GB2144497B/en
Expired 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0618—Details of blocking mechanism comprising a helical spring loaded element, e.g. ball
    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0681—Double cone synchromesh clutches
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H2063/3093—Final output elements, i.e. the final elements to establish gear ratio, e.g. dog clutches or other means establishing coupling to shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Friction Gearing (AREA)

Abstract

Synchromesh for a gear transmission, particularly that of a motor vehicle, comprises a cone ring (5) floatingly arranged between a floatingly arranged synchronising ring (1) with an internal conical friction surface and a synchronising cone (2) with an external conical friction surface, the cone (2) being associated with a gear wheel (4). The cone ring (5) can be of a cheap material which has good emergency running properties and a good coefficient of frictional, for example a non-ferrous metal. <IMAGE>

Description

SPECIFICATION Synchromesh for a gear transmission The present invention relates to synchromesh for a gear transmission, particularly that of a motor vehicle.
Synchronising devices are known in which a preferably floatingly arranged synchronising ring is coated by a metal having a high surface hardness and good emergency running properties so that, in conjunction with a hardened conical friction surface of a gear wheel to be synchronised, a high friction coefficient and a long working life of the friction surfaces are achieved under conditions of the mixed friction and partial dry friction.
A disadvantage of synchronising devices of that kind resides in the high manufacturing costs of the synchronising rings, as the coating metals, which provide high surface hardness and good emergency running properties, are very expensive and require special preparation techniques for granulate production as well as special coating techniques.
Moreover, they ential the disadvantage that merely a single internal surface is present to accept the wear.
There is therefore scope for reduction in the high technological production cost of usual synchronising devices and for a saving in expensive metallic material, while at the same time making possible a longer working life.
According to the present invention, therefore, between a floatingly arranged synchronising ring, the internal cone of which no longer requires coating with a metal having a high surface hardness and good emergency running properties, and a conical friction surface of an associated gear wheel to be synchronised, there is arranged, preferably floating, an intermediate cone ring of a cheap material which has good emergency running properties and a good friction value, e.g. a non-ferrous metal, wherein the outer surface thereof comes into frictional contact with the internal cone of the synchronising ring and the internal surface thereof with the external cone of the associated gear wheel so that each of the frictional surfaces of the cone ring experiences only about half the specific loading through the frictional movement.
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawing, the single figure of which is a sectional view of synchromesh embodying the invention.
Referring now to the drawing, there is shown synchromesh comprising a cone ring 5 floatingly arranged between a synchronising ring 1 and a synchronising cone 2, an internal toothing 3 of which stands in geared connection with an associated gear wheel 4 to be synchronised.
As soon as the synchronising ring 1 has been moved into its locking position through actuation of a gear shift sleeve 7 guided on a sleeve carrier 6 and the frictional process has been initiated for the purpose of synchronisation of the sleeve carrier 6 and the synchronising cone 2, the internal cone surface of the synchronising ring 1 bears against the external cone surface of the cone ring 5, the internal cone surface of which in that case bears against the external cone surface of the sychronising cone 2.
By reason of the frictional moment acting between the contacting cone surfaces synchronisation of the sleeve carrier 6 and the synchronising cone 2 is achieved.
1. Synchromesh for a gear transmission, comprising a synchronising cone, a synchronising ring, and an intermediate cone ring floatingly arranged between the synchronising cone and the synchronising ring and having frustro-conical inner and outer friction surfaces.
2. Synchromesh substantially as hereinbefore described with reference to the accompanying drawing.
3. A gear transmission comprising synchromesh as claimed in either claim 1 or claim 2.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Synchromesh for a gear transmission The present invention relates to synchromesh for a gear transmission, particularly that of a motor vehicle. Synchronising devices are known in which a preferably floatingly arranged synchronising ring is coated by a metal having a high surface hardness and good emergency running properties so that, in conjunction with a hardened conical friction surface of a gear wheel to be synchronised, a high friction coefficient and a long working life of the friction surfaces are achieved under conditions of the mixed friction and partial dry friction. A disadvantage of synchronising devices of that kind resides in the high manufacturing costs of the synchronising rings, as the coating metals, which provide high surface hardness and good emergency running properties, are very expensive and require special preparation techniques for granulate production as well as special coating techniques. Moreover, they ential the disadvantage that merely a single internal surface is present to accept the wear. There is therefore scope for reduction in the high technological production cost of usual synchronising devices and for a saving in expensive metallic material, while at the same time making possible a longer working life. According to the present invention, therefore, between a floatingly arranged synchronising ring, the internal cone of which no longer requires coating with a metal having a high surface hardness and good emergency running properties, and a conical friction surface of an associated gear wheel to be synchronised, there is arranged, preferably floating, an intermediate cone ring of a cheap material which has good emergency running properties and a good friction value, e.g. a non-ferrous metal, wherein the outer surface thereof comes into frictional contact with the internal cone of the synchronising ring and the internal surface thereof with the external cone of the associated gear wheel so that each of the frictional surfaces of the cone ring experiences only about half the specific loading through the frictional movement. An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawing, the single figure of which is a sectional view of synchromesh embodying the invention. Referring now to the drawing, there is shown synchromesh comprising a cone ring 5 floatingly arranged between a synchronising ring 1 and a synchronising cone 2, an internal toothing 3 of which stands in geared connection with an associated gear wheel 4 to be synchronised. As soon as the synchronising ring 1 has been moved into its locking position through actuation of a gear shift sleeve 7 guided on a sleeve carrier 6 and the frictional process has been initiated for the purpose of synchronisation of the sleeve carrier 6 and the synchronising cone 2, the internal cone surface of the synchronising ring 1 bears against the external cone surface of the cone ring 5, the internal cone surface of which in that case bears against the external cone surface of the sychronising cone 2. By reason of the frictional moment acting between the contacting cone surfaces synchronisation of the sleeve carrier 6 and the synchronising cone 2 is achieved. CLAIMS
1. Synchromesh for a gear transmission, comprising a synchronising cone, a synchronising ring, and an intermediate cone ring floatingly arranged between the synchronising cone and the synchronising ring and having frustro-conical inner and outer friction surfaces.
2. Synchromesh substantially as hereinbefore described with reference to the accompanying drawing.
3. A gear transmission comprising synchromesh as claimed in either claim 1 or claim 2.
GB8321032A 1981-07-15 1983-08-04 Synchromesh for a gear transmission Expired GB2144497B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD23177781A DD225867A3 (en) 1981-07-15 1981-07-15 CONE RING IN BALANCING EQUIPMENT FOR INVERTER GEAR, ESPECIALLY FOR MOTOR VEHICLES

Publications (3)

Publication Number Publication Date
GB8321032D0 GB8321032D0 (en) 1983-09-07
GB2144497A true GB2144497A (en) 1985-03-06
GB2144497B GB2144497B (en) 1986-11-26

Family

ID=5532356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8321032A Expired GB2144497B (en) 1981-07-15 1983-08-04 Synchromesh for a gear transmission

Country Status (6)

Country Link
BG (1) BG46407A1 (en)
DD (1) DD225867A3 (en)
DE (1) DE3328812A1 (en)
FR (1) FR2551164B1 (en)
GB (1) GB2144497B (en)
SE (1) SE443207B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735978A1 (en) * 1986-10-25 1988-04-28 Nsk Warner Kk Synchroniser for a synchromesh gearbox

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD225867A3 (en) * 1981-07-15 1985-08-07 Ifa Getriebewerke Brandenburg CONE RING IN BALANCING EQUIPMENT FOR INVERTER GEAR, ESPECIALLY FOR MOTOR VEHICLES
DE3637386C1 (en) * 1986-11-03 1987-09-24 Neuenstein Zahnradwerk Method and device for producing synchronization bodies in gearboxes of motor vehicles
DE3705632A1 (en) * 1987-02-21 1988-09-01 Neuenstein Zahnradwerk FRICTIONAL ELEMENT, PARTICULARLY SYNCHRONIZING BODY IN STAGE DRIVES OF MOTOR VEHICLES
JP2600674B2 (en) * 1987-05-09 1997-04-16 トヨタ自動車株式会社 Synchronizer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB946124A (en) * 1958-10-24 1964-01-08 Renault Improvements in or relating to synchromeshing devices
GB1102991A (en) * 1963-03-04 1968-02-14 Smith S Ind Ltd Improvements in or relating to synchromesh mechanism
GB1113413A (en) * 1964-08-03 1968-05-15 Borg Warner Transmission synchronizer
GB1125946A (en) * 1964-10-16 1968-09-05 Smiths Industries Ltd Improvements in or relating to dog clutches
GB1137332A (en) * 1965-05-03 1968-12-18 Borg Warner Synchronizer mechanism
GB1159744A (en) * 1966-10-05 1969-07-30 Borg Warner Synchronizer.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1385860A (en) * 1964-03-03 1965-01-15 Smith & Sons Ltd S Improvements to synchronized meshing mechanisms, in particular for gear changes
US3286801A (en) * 1964-07-17 1966-11-22 Dana Corp Synchronizing clutch with multiple conical discs
FR1444451A (en) * 1965-08-03 1966-07-01 Borg Warner Transmission synchronizer
DE2421963A1 (en) * 1974-05-07 1975-11-20 Volkswagenwerk Ag Interlocking synchronization for vehicle gear box - contains conically wound elastic servo ring with supported ends
DD225867A3 (en) * 1981-07-15 1985-08-07 Ifa Getriebewerke Brandenburg CONE RING IN BALANCING EQUIPMENT FOR INVERTER GEAR, ESPECIALLY FOR MOTOR VEHICLES
DE3341147A1 (en) * 1982-12-27 1984-06-28 VEB IFA-Getriebewerke Brandenburg Betrieb d. IFA-Komb. Nutzkraftwagen, DDR 1800 Brandenburg FRICTION PAIRING FOR SYNCHRONIZING DEVICES IN GEAR GEARS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB946124A (en) * 1958-10-24 1964-01-08 Renault Improvements in or relating to synchromeshing devices
GB1102991A (en) * 1963-03-04 1968-02-14 Smith S Ind Ltd Improvements in or relating to synchromesh mechanism
GB1113413A (en) * 1964-08-03 1968-05-15 Borg Warner Transmission synchronizer
GB1125946A (en) * 1964-10-16 1968-09-05 Smiths Industries Ltd Improvements in or relating to dog clutches
GB1137332A (en) * 1965-05-03 1968-12-18 Borg Warner Synchronizer mechanism
GB1159744A (en) * 1966-10-05 1969-07-30 Borg Warner Synchronizer.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735978A1 (en) * 1986-10-25 1988-04-28 Nsk Warner Kk Synchroniser for a synchromesh gearbox

Also Published As

Publication number Publication date
DE3328812A1 (en) 1985-02-21
SE8304274L (en) 1985-02-05
GB8321032D0 (en) 1983-09-07
BG46407A1 (en) 1989-12-15
FR2551164A1 (en) 1985-03-01
GB2144497B (en) 1986-11-26
DD225867A3 (en) 1985-08-07
SE443207B (en) 1986-02-17
FR2551164B1 (en) 1990-02-23
SE8304274D0 (en) 1983-08-04

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Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee