EP1373748A1 - Synchronizer ring and method and press tool for its manufacture - Google Patents

Synchronizer ring and method and press tool for its manufacture

Info

Publication number
EP1373748A1
EP1373748A1 EP02707366A EP02707366A EP1373748A1 EP 1373748 A1 EP1373748 A1 EP 1373748A1 EP 02707366 A EP02707366 A EP 02707366A EP 02707366 A EP02707366 A EP 02707366A EP 1373748 A1 EP1373748 A1 EP 1373748A1
Authority
EP
European Patent Office
Prior art keywords
synchronizing ring
protrusions
pressing tool
synchronizing
viewed
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.)
Withdrawn
Application number
EP02707366A
Other languages
German (de)
French (fr)
Inventor
Anders Hedman
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.)
Volvo Truck Corp
Original Assignee
Volvo Lastvagnar AB
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 Volvo Lastvagnar AB filed Critical Volvo Lastvagnar AB
Publication of EP1373748A1 publication Critical patent/EP1373748A1/en
Withdrawn legal-status Critical Current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
    • F16D23/025—Synchro rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the present invention relates to a synchronizing ring and a method for producing the synchronizing ring, which synchronizing ring is intended for use in a vehicle transmission, according to the preamble to the following Patent Claims 1 and 5.
  • the synchronizing ring is produced by a pressing tool, according to the preamble to the following Patent Claim 8.
  • a synchronizing ring intended to synchronize the rotation speed of two different transmission elements in a vehicle transmission comprises an annular part and a friction surface disposed on the annular part.
  • the friction surface is often conical and it is this surface which, in the synchronization process, is brought into frictional engagement with a corresponding friction surface on another transmission element, for example a coupling ring.
  • This document does not go into detail about the actual synchronization function with associated transmission elements (for synchronization function, see also, for example, SE 0100453-0 or SE 514321 ).
  • the starting point is a blank.
  • the blanks can be, for example, conventionally forged, precision-forged, powder-forged or possibly sintered. Rational blank production is realized with two tool halves which are axially pressed together. The final shape of the blank is determined by a cavity between these tool halves. Production materials for synchronizing rings are normally steel or brass.
  • the blank might then be worked by, for example, milling, turning, drilling or the like.
  • the blank which broadly has the appearance of the finished synchronizing ring, is next hardened.
  • the synchronizing ring is hard-worked (for example, ground) on exacting surfaces (such as, for example, friction surfaces).
  • At least the production methods comprising precision-forging, powder- forging, with possible sintering make it possible for step 2, i.e. working of the blank by, for example, milling, turning, drilling or the like, to be eliminated. Elimination of production steps yields cost reductions.
  • SE 514231 shows a synchronizing ring 14 having an annular part, a friction surface 13 and grooves 32, 34 for a pre-synchronizing member in the form of an annular spring 28.
  • the synchronizing ring also exhibits a plurality of different radially projecting protrusions 36, 37, 30, each having different functions.
  • the protrusions 36 and 37 viewed in the axial direction, are arranged directly in line.
  • the protrusion 36 viewed axially, is defined as the outer protrusion, whilst the protrusion 37 is defined as the inner protrusion.
  • either the pressing tool must consist of more than two pressing tool parts or there is a need for a subsequent working (according to step 2 above). This is not advantageous from a production viewpoint. More production steps incur increased costs.
  • the main object of the invention described below is to produce a synchronizing ring with lower production costs and maintained synchronizing functions.
  • Patent Claims 1 and 8 The problem solution according to the invention, with due regard to the devices according to the invention, is described in Patent Claims 1 and 8.
  • Patent Claim 5 The problem solution according to the invention, with due regard to the production method according to the invention, is described in Patent Claim 5.
  • Patent Claims 2 to 4 plus 6 to 7 and 9 to 11 describe preferred modes and refinements of the devices according to the invention according to Claims 1 and 8 and the method according to Claim 5.
  • the first device according to the invention is based on a synchronizing ring of the type stated in the introduction but which is characterized in that the outer protrusions, viewed in the peripheral direction, are displaced relative to the inner protrusions so that the outer protrusions relative to the inner protrusions, viewed in the axial direction, are not arranged directly in line.
  • the production method according to the invention is based on methods of the type stated in the introduction, i.e. precision-forging and powder-forging.
  • the production methods encompass the steps:
  • the production method is characterized in that the pressing tool halves are produced so that the outer protrusions are not arranged along the same axial line as the inner protrusions, that is to say that the outer protrusions, viewed in the peripheral direction, are somewhat displaced relative to the inner protrusions.
  • the second device according to the invention is based on a pressing tool of the type stated in the introduction but which is characterized in that the moulds in the pressing tool for the outer protrusions, viewed in the peripheral direction, are displaced relative to the moulds for the inner protrusions so that the moulds for the outer protrusions relative to the moulds for the inner protrusions, viewed in the axial direction, are not arranged directly in line.
  • the foremost advantage with the first and second device and the method according to the invention is that the production costs are reduced. Another advantage is that the production becomes simpler and requires shorter production time. This is achieved with maintained functions of the synchronizing ring.
  • Figure 1 shows a partial diagrammatic representation of a "rolled-out periphery" or side view of a mode of the synchronizing ring according to the invention.
  • Figure 2 shows a diagrammatic representation of a section A-A of the mode according to Figure 1.
  • Figure 3 shows a diagrammatic representation of a section B-B of the mode according to Figure 1.
  • Figure 1 shows a part of a mode of a synchronizing ring, which synchronizing ring is universally denoted by 14.
  • the synchronizing ring 14 exhibits three different types of radial protrusions 30, 36, 37. All types of protrusions are necessary for the functioning of the synchronizing ring in the synchronization process. The number of protrusions for respective types of protrusion can, however, be varied.
  • the protrusions 36 are designated as the outer protrusions whilst the protrusions 37 are designated as the inner protrusions.
  • corresponding radial protrusions are arranged directly in line (viewed in the axial direction, for example from the right in Figure 4 in SE 514231 ).
  • a synchronizing ring of this type i.e. of the type shown in SE 514231 and according to the present invention
  • two pressing tool halves (not shown), which are pressed together in the axial direction, i.e. from the right and left respectively in Figure 1.
  • the dividing line, i.e. where the pressing tool halves meet, is in Figure 1 indicated by a dotted line 38.
  • the mould for forming a synchronizing ring and its parts is constituted by cavities in the respective tool half.
  • the invention ensures that the axial compression forces from the respective tool half manage to compress the metal powder (in powder-forging) or the blank (in precision- forging) in all parts of the synchronizing ring 14.
  • the plateaued groove In order to produce, as in SE 514231 , a recessed groove having two plateaux (32, 34 in SE 514231 ) for a pre-synchronizing member in the form of an annular spring, the plateaued groove must be additionally worked, for example by milling, or additionally pressed with at least a third pressing tool part, in addition to the two pressing tool parts needed to produce the actual annular part of the synchronizing ring with its possible protrusions.
  • corresponding plateaued grooves are produced without an extra working step or an extra pressing tool part. This is possible because no details on the synchronizing ring are arranged directly in line, viewed in the axial direction of the synchronizing ring.
  • Corresponding grooves in the synchronizing ring 14 according to the invention are formed by the surfaces 32, 34 and 40 (see Figures 1 , 2 and 3).
  • the surfaces 34 and 40 are chosen such that they end up on the same radius measured out from the centre axis of the synchronizing ring (not shown).
  • the surfaces 32 must be positioned somewhat higher (greater radius) than the two surfaces 34 and 40 (see Figures 2 and 3).
  • a pre- synchronizing member in the form of an annular spring (not shown) will be able to be arranged either in a higher position on the surfaces 32 or a lower position on the surfaces 34 or 40, depending on which of the surfaces 34 or 40 is situated highest.
  • the cavities i.e. the mould in the respective halves of the pressing tool, are configured such that they correspond to the synchronizing ring 14 shown by the Figures 1 , 2 and 3.
  • the invention is not limited to use in any specific gearing arrangement, but can advantageously be disposed in different types of gearing arrangements, such as, for example, split gears, basic gearboxes or ordinary synchronized gearboxes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Operated Clutches (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention relates to a synchronizing ring, a method for producing the synchronizing ring and a pressing tool for producing the synchronizing ring. The synchronizing ring is intended for use in a vehicle transmission. The outer protrusions (36) are not arranged along the same axial line as the inner protrusions (37), that is to say that the outer protrusions (36), viewed in the peripheral direction, are somewhat displaced relative to the inner protrusions (37). This yields production benefits.

Description

Synchronizer ring and method and press tool for its manufacture
TECHNICAL FIELD
The present invention relates to a synchronizing ring and a method for producing the synchronizing ring, which synchronizing ring is intended for use in a vehicle transmission, according to the preamble to the following Patent Claims 1 and 5. The synchronizing ring is produced by a pressing tool, according to the preamble to the following Patent Claim 8.
BACKGROUND ART
A synchronizing ring intended to synchronize the rotation speed of two different transmission elements in a vehicle transmission comprises an annular part and a friction surface disposed on the annular part. The friction surface is often conical and it is this surface which, in the synchronization process, is brought into frictional engagement with a corresponding friction surface on another transmission element, for example a coupling ring. This document does not go into detail about the actual synchronization function with associated transmission elements (for synchronization function, see also, for example, SE 0100453-0 or SE 514321 ).
The production of synchronizing rings for vehicle transmission purposes can be said to follow the following steps:
1. The starting point is a blank. The blanks can be, for example, conventionally forged, precision-forged, powder-forged or possibly sintered. Rational blank production is realized with two tool halves which are axially pressed together. The final shape of the blank is determined by a cavity between these tool halves. Production materials for synchronizing rings are normally steel or brass.
2. The blank might then be worked by, for example, milling, turning, drilling or the like.
3. The blank, which broadly has the appearance of the finished synchronizing ring, is next hardened.
4. Finally, the synchronizing ring is hard-worked (for example, ground) on exacting surfaces (such as, for example, friction surfaces).
At least the production methods comprising precision-forging, powder- forging, with possible sintering make it possible for step 2, i.e. working of the blank by, for example, milling, turning, drilling or the like, to be eliminated. Elimination of production steps yields cost reductions.
SE 514231 shows a synchronizing ring 14 having an annular part, a friction surface 13 and grooves 32, 34 for a pre-synchronizing member in the form of an annular spring 28. The synchronizing ring also exhibits a plurality of different radially projecting protrusions 36, 37, 30, each having different functions. The protrusions 36 and 37, viewed in the axial direction, are arranged directly in line. The protrusion 36, viewed axially, is defined as the outer protrusion, whilst the protrusion 37 is defined as the inner protrusion. In order to be able to obtain the groove 32 on the synchronizing ring 14, either the pressing tool must consist of more than two pressing tool parts or there is a need for a subsequent working (according to step 2 above). This is not advantageous from a production viewpoint. More production steps incur increased costs.
The main object of the invention described below is to produce a synchronizing ring with lower production costs and maintained synchronizing functions.
DISCLOSURE OF INVENTION
The problem solution according to the invention, with due regard to the devices according to the invention, is described in Patent Claims 1 and 8. The problem solution according to the invention, with due regard to the production method according to the invention, is described in Patent Claim 5. Patent Claims 2 to 4 plus 6 to 7 and 9 to 11 describe preferred modes and refinements of the devices according to the invention according to Claims 1 and 8 and the method according to Claim 5.
The first device according to the invention is based on a synchronizing ring of the type stated in the introduction but which is characterized in that the outer protrusions, viewed in the peripheral direction, are displaced relative to the inner protrusions so that the outer protrusions relative to the inner protrusions, viewed in the axial direction, are not arranged directly in line.
The production method according to the invention is based on methods of the type stated in the introduction, i.e. precision-forging and powder-forging. The production methods encompass the steps:
1. filling of a tool half with metal powder or insertion in a tool half of a forging blank for the forming of the synchronizing ring;
2. pressing-together of the first tool half against a second tool half by means of a force, acting in the axial direction of the synchronizing ring, for forming and possible sintering of the synchronizing ring. The production method is characterized in that the pressing tool halves are produced so that the outer protrusions are not arranged along the same axial line as the inner protrusions, that is to say that the outer protrusions, viewed in the peripheral direction, are somewhat displaced relative to the inner protrusions. The second device according to the invention is based on a pressing tool of the type stated in the introduction but which is characterized in that the moulds in the pressing tool for the outer protrusions, viewed in the peripheral direction, are displaced relative to the moulds for the inner protrusions so that the moulds for the outer protrusions relative to the moulds for the inner protrusions, viewed in the axial direction, are not arranged directly in line.
The foremost advantage with the first and second device and the method according to the invention is that the production costs are reduced. Another advantage is that the production becomes simpler and requires shorter production time. This is achieved with maintained functions of the synchronizing ring.
Further advantageous modes of the invention can be seen from the contingent patent claims following the main claims (Claims 2-4, 6-7, 9-11 ).
BRIEF DESCRIPTION OF DRAWINGS
The present invention will be described in greater detail below with reference to the appended drawings showing, by way of example, further preferred modes of the invention.
Figure 1 shows a partial diagrammatic representation of a "rolled-out periphery" or side view of a mode of the synchronizing ring according to the invention.
Figure 2 shows a diagrammatic representation of a section A-A of the mode according to Figure 1.
Figure 3 shows a diagrammatic representation of a section B-B of the mode according to Figure 1. MODE(S) FOR CARRYING OUT THE INVENTION
Figure 1 shows a part of a mode of a synchronizing ring, which synchronizing ring is universally denoted by 14. The synchronizing ring 14 exhibits three different types of radial protrusions 30, 36, 37. All types of protrusions are necessary for the functioning of the synchronizing ring in the synchronization process. The number of protrusions for respective types of protrusion can, however, be varied. In Figure 1, the protrusions 36 are designated as the outer protrusions whilst the protrusions 37 are designated as the inner protrusions.
According to the background art (see, for example, SE 514231 , Figure 4, figure reference 36 and 37), corresponding radial protrusions are arranged directly in line (viewed in the axial direction, for example from the right in Figure 4 in SE 514231 ).
The production of a synchronizing ring of this type (i.e. of the type shown in SE 514231 and according to the present invention) is realized with two pressing tool halves (not shown), which are pressed together in the axial direction, i.e. from the right and left respectively in Figure 1. The dividing line, i.e. where the pressing tool halves meet, is in Figure 1 indicated by a dotted line 38. The mould for forming a synchronizing ring and its parts is constituted by cavities in the respective tool half. The invention ensures that the axial compression forces from the respective tool half manage to compress the metal powder (in powder-forging) or the blank (in precision- forging) in all parts of the synchronizing ring 14. This is achieved by the fact that none of the details of the synchronizing ring 14 are arranged directly in line, viewed in the axial direction. The synchronizing ring 14 is thereby, in principle, ready-made after the form-pressing and a working step which might be present in the production can be eliminated. The protrusions 36 and 37, viewed in the peripheral direction, are therefore arranged in a displaced position relative to each other (see Figure 1 ).
In order to produce, as in SE 514231 , a recessed groove having two plateaux (32, 34 in SE 514231 ) for a pre-synchronizing member in the form of an annular spring, the plateaued groove must be additionally worked, for example by milling, or additionally pressed with at least a third pressing tool part, in addition to the two pressing tool parts needed to produce the actual annular part of the synchronizing ring with its possible protrusions.
According to the present invention, corresponding plateaued grooves are produced without an extra working step or an extra pressing tool part. This is possible because no details on the synchronizing ring are arranged directly in line, viewed in the axial direction of the synchronizing ring. Corresponding grooves in the synchronizing ring 14 according to the invention are formed by the surfaces 32, 34 and 40 (see Figures 1 , 2 and 3). Preferably, the surfaces 34 and 40 are chosen such that they end up on the same radius measured out from the centre axis of the synchronizing ring (not shown). For maintained functioning, however, the surfaces 32 must be positioned somewhat higher (greater radius) than the two surfaces 34 and 40 (see Figures 2 and 3). The tops of the protrusions 30, 36 and 37 are situated highest relative to the surfaces 32, 34 and 40 (see Figures 2 and 3). A pre- synchronizing member in the form of an annular spring (not shown) will be able to be arranged either in a higher position on the surfaces 32 or a lower position on the surfaces 34 or 40, depending on which of the surfaces 34 or 40 is situated highest.
The cavities, i.e. the mould in the respective halves of the pressing tool, are configured such that they correspond to the synchronizing ring 14 shown by the Figures 1 , 2 and 3. The invention is not limited to use in any specific gearing arrangement, but can advantageously be disposed in different types of gearing arrangements, such as, for example, split gears, basic gearboxes or ordinary synchronized gearboxes.

Claims

1. Synchronizing ring (14), which is disposed in a gearing arrangement belonging to a vehicle transmission, comprising an annular part, at least one outer radial protrusion (36) disposed on the annular part, at least one inner radial protrusion (37) and a friction surface (13), characterized in that the outer protrusions (36), viewed in the peripheral direction, are displaced relative to the inner protrusions (37) so that the outer protrusions (36) relative to the inner protrusions (37), viewed in the axial direction, are not arranged directly in line.
2. Synchronizing ring according to Claim 1 , characterized in that none of the details (30, 36, 37) of the synchronizing ring (14) are arranged directly in line, viewed in the axial direction.
3. Synchronizing ring according to any of the preceding claims, characterized in that at least one groove (32, 34) for a pre-synchronizing member is arranged right around the peripheral surface of the synchronizing ring and between the two protrusions (36, 37).
4. Synchronizing ring according to Claim 3, characterized in that the pre- synchronizing member is constituted by an annular spring.
5. Method for producing a synchronizing ring (14) intended for use in a vehicle transmission, comprising an annular part, at least one outer radial protrusion (36) disposed on the annular part, at least one inner radial protrusion (37) and a friction surface (13), in which the method comprises the steps: filling of a tool half with metal powder or insertion in a tool half of a forging blank for the forming of the synchronizing ring (14); pressing-together of the first tool half against a second tool half by means of a force, acting in the axial direction of the synchronizing ring (14), for forming and possible sintering of the synchronizing ring (14); characterized in that the pressing tool halves are produced so that the outer protrusions (36) are not arranged along the same axial line as the inner protrusions (37), that is to say that the outer protrusions (36), viewed in the peripheral direction, are somewhat displaced relative to the inner protrusions (37).
6. Method for producing a synchronizing ring according to Claim 5, characterized in that the pressing tool halves are produced such that none of the details (30, 36, 37) of the synchronizing ring (14) are arranged directly in line, viewed in the axial direction.
7. Method for producing a synchronizing ring according to either of Claims 5 or 6, characterized in that the pressing tool halves are produced so that at least one groove (32, 34) for a pre-synchronizing member can be form-pressed right around the peripheral surface of the synchronizing ring and between the two protrusions (36, 37).
8. Pressing tool for producing a synchronizing ring (14) intended for use in a vehicle transmission, in which the moulds in the pressing tool for the synchronizing ring comprise an annular part, at least one outer radial protrusion (36) disposed on the annular part, at least one inner radial protrusion (37) and a friction surface (13), and in which the pressing tool comprises two tool halves, characterized in that the moulds in the pressing tool for the outer protrusions (36), viewed in the peripheral direction, are displaced relative to the moulds for the inner protrusions (37) so that the moulds for the outer protrusions (36) relative to the moulds for the inner protrusions (37), viewed in the axial direction, are not arranged directly in line.
9. Pressing tool according to Claim 8, characterized in that none of the moulds of the pressing tool for the details (30, 36, 37) of the synchronizing ring (14) are arranged directly in line, viewed in the axial direction.
10. Pressing tool according to either of Claims 8 or 9, characterized in that the dividing line of the pressing tool is arranged precisely adjacent to the mould for both the outer protrusions (36) and the inner protrusions (37) respectively.
11. Pressing tool according to any of Claims 8 to 10, characterized in that a mould for at least one groove (32, 34) for a pre-synchronizing member is disposed in the pressing tool so that the groove is arranged right around the peripheral surface of the form-pressed synchronizing ring and between the outer protrusions (36) and the inner protrusions (37).
EP02707366A 2001-03-26 2002-03-12 Synchronizer ring and method and press tool for its manufacture Withdrawn EP1373748A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0101090A SE520275C2 (en) 2001-03-26 2001-03-26 Synchronization ring and method and pressing tool for manufacturing thereof
SE0101090 2001-03-26
PCT/SE2002/000441 WO2002077480A1 (en) 2001-03-26 2002-03-12 Synchronizer ring and method and press tool for its manufacture

Publications (1)

Publication Number Publication Date
EP1373748A1 true EP1373748A1 (en) 2004-01-02

Family

ID=20283560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02707366A Withdrawn EP1373748A1 (en) 2001-03-26 2002-03-12 Synchronizer ring and method and press tool for its manufacture

Country Status (3)

Country Link
EP (1) EP1373748A1 (en)
SE (1) SE520275C2 (en)
WO (1) WO2002077480A1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998445A (en) * 1989-11-01 1991-03-12 Tanaka Seimitu Kogyo Kabushiki Kaisha Synchronizer ring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02077480A1 *

Also Published As

Publication number Publication date
SE0101090L (en) 2002-09-27
WO2002077480A1 (en) 2002-10-03
SE520275C2 (en) 2003-06-17
SE0101090D0 (en) 2001-03-26

Similar Documents

Publication Publication Date Title
US6216550B1 (en) Sliding sleeve of a synchronizer assembly for manual transmissions
EP0552021B1 (en) Gear product
EP1255936B1 (en) Synchronizing device for a planet gear
CN103260788B (en) The method of Workpiece shaping
US6090320A (en) Method of producing a sintered body
US20120083384A1 (en) Planetary gearbox having nested planetary gear stages
JPH0712509B2 (en) Outside ring manufacturing method
JP2008111550A (en) Transmission synchronization system in form of servo-synchronization system
JPH08311507A (en) Production of sliding sleeve for synchronizer of gear reducer
EP1389694B1 (en) Synchronizer sleeve used in power transmission and press-forming apparatus for the same
JP6391218B2 (en) Synchronizer ring
JPH02299785A (en) Production of speed-changing or sliding sleeve for speed changer of automobile
CN105317871A (en) Synchronizer ring for a synchronization unit of a manual transmission and method for manufacturing such synchronizer ring
CN107178564A (en) Method for the sliding sleeve of the synchronizer of manual transmission and for manufacturing this sliding sleeve
CN103782050A (en) synchronous body
JPH02185905A (en) Method and apparatus for deformation of gear face of cratch prepared by means of powder metallurgy
CN104718391A (en) Synchronization device for manual transmission of vehicle
WO2012112661A2 (en) Synchronizer sleeve for a transmission and method of making
WO2002077480A1 (en) Synchronizer ring and method and press tool for its manufacture
CN208587419U (en) The sliding sleeve and synchronizer of synchronizer for gear shift transmission
CN105312584A (en) Method for making slide sleeve ring
CN103133555B (en) Clutch body and the method for manufacturing clutch body
GB2154911A (en) Manufacturing coupling teeth
CN106246756A (en) Wheel hub, sliding sleeve and synchronizer and for manufacturing the method for wheel hub and for the method manufacturing sliding sleeve
CN103128488A (en) Method for manufacturing clutch body

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20031027

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17Q First examination report despatched

Effective date: 20080609

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20081021