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US5018404A
Expired / Lapsed
US
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Control arrangement for a gear shift transmission
Assignee: Dr Ing HCF Porsche AG
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Filing: 1989-12-06
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Granted: 1991-05-28
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Expires: 2009-12-06
Abstract
Abstract A controlling arrangement for a motor vehicle gear shift transmission has a central component shift piece which interacts with several shift rails disposed next to one another and assigned to the individual transmission gears and with a shift rail lock mechanism that, when one shift rail respectively is moved, locks the remaining shift rails. A shift finger mounted on the shift piece has involute flanks on both sides, which flanks rest against plane V-surfaces of a V-shaped recess of the shift rail to be controlled. Locking cams of the locking mechanism rest against the V-surfaces of the other shift rails and are axially and radially offset with respect to the shift finger mounted on the shift piece.
Inventors
- 👤 Robert Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:44
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/34; F16H63/36; F16H63/08; F16H63/20; F16H63/3069; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20085; Y10T74/20104
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
An arrangement for controlling a synchronized gear shift transmission of a motor vehicle, comprising: a shift piece means that is longitudinally slidable on a shifting shaft by a selector lever fastened to a preselector shaft; said shift piece means is non-rotatably connected with the shifting shaft; the shift piece means controls shifting forks that engage synchronizing clutches of individual transmission gears by a shifting finger interacting with several shift rails disposed next to one another; stop means for restraining remaining shift rails when one shift rail is moved; and wherein the shift finger is equipped with an involute flank which is applied to a plane contact surface of the shift rail to be moved.
Claim 2
Dependent Claim
114 words
An arrangement for controlling a synchronized gear shift transmission of a motor vehicle, comprising: a shift piece means that is longitudinally slidable on a shifting shaft by a selector lever fastened to a preselector shaft; said shift piece means is non-rotatably connected with the shifting shaft; the shift piece means controls shifting forks that engage synchronizing clutches of individual transmission gears by a shifting finger interacting with several shift rails disposed next to one another; stop means for restraining remaining shift rails when one shift rail is moved; and wherein the shift finger is equipped with an involute flank which is applied to a plane contact surface of the shift rail to be moved.
Claim 3
Dependent Claim
45 words
An arrangement according to claim 1, wherein the shift finger has at least two involute flanks, one on each side of the finger; and wherein said flanks rest against two plane V-surfaces of a V-shaped recess that constitutes the contact surface of the shift rail.
Claim 4
Dependent Claim
17 words
An arrangement according to claim 2, wherein the V-shaped recess has an angle of approximately 60 degrees.
Claim 5
Dependent Claim
56 words
An arrangement according to claim 1, wherein the stop means comprises diametrically opposite stop cams vertically mounted on the shift piece with respect to the shift finger and axially offset with respect to the shaft finger; and wherein circular outer contours of these stop cams rest against a V-surface of the shift rails to be locked.
Claim 6
Dependent Claim
56 words
An arrangement according to claim 2, wherein the stop means comprises diametrically opposite stop cams vertically mounted on the shift piece with respect to the shift finger and axially offset with respect to the shift finger; and wherein circular outer contours of these stop cams rest against the V-surface of the shift rails to be locked.
Claim 7
Dependent Claim
56 words
An arrangement according to claim 3, wherein the stop means comprises diametrically opposite stop cams vertically mounted on the shift piece with respect to the shift finger and axially offset with respect to the shift finger; and wherein circular outer contours of these stop cams rest against a V-surface of the shift rails to be locked.
Claim 8
Dependent Claim
75 words
An arrangement according to claim 1, wherein the several shift rails are three in number and are each respectively assigned to two transmission gears; wherein each of the shift rails, have shift lugs means for engaging the shift forks; wherein the shift forks are longitudinally guided on a guiding tube which is in parallel with respect to transmission shafts of the transmission; and wherein the shift forks engage sliding sleeves to control the synchronizing clutches.
Claim 9
Dependent Claim
75 words
An arrangement according to claim 2, wherein the several shift rails are three in number and are each respectively assigned to two transmission gears; wherein each of the shift rails, have shift lugs means for engaging the shift forks; wherein the shift forks are longitudinally guided on a guiding tube which is in parallel with respect to transmission shafts of the transmission; and wherein the shift forks engage sliding sleeves to control the synchronizing clutches.
Claim 10
Dependent Claim
75 words
An arrangement according to claim 3, wherein the several shift rails are three in number and are each respectively assigned to two transmission gears; wherein each of the shift rails, have shift lugs means for engaging the shift forks; wherein the shift forks are longitudinally guided on a guiding tube which is in parallel with respect to transmission shafts of the transmission; and wherein the shift forks engage sliding sleeves to control the synchronizing clutches.
Claim 11
Dependent Claim
75 words
An arrangement according to claim 4, wherein the several shift rails are three in number and are each respectively assigned to two transmission gears; wherein each of the shift rails, have shift lugs means for engaging the shift forks; wherein the shift forks are longitudinally guided on a guiding tube which is in parallel with respect to transmission shafts of the transmission; and wherein the shift forks engage sliding sleeves to control the synchronizing clutches.
Claim 12
Dependent Claim
75 words
An arrangement according to claim 5, wherein the several shift rails are three in number and are each respectively assigned to two transmission gears; wherein each of the shift rails, have shift lugs means for engaging the shift forks; wherein the shift forks are longitudinally guided on a guiding tube which is in parallel with respect to transmission shafts of the transmission; and wherein the shift forks engage sliding sleeves to control the synchronizing clutches.
Claim 13
Dependent Claim
75 words
An arrangement according to claim 6, wherein the several shift rails are three in number and are each respectively assigned to two transmission gears; wherein each of the shift rails, have shift lugs means for engaging the shift forks; wherein the shift forks are longitudinally guided on a guiding tube which is in parallel with respect to transmission shafts of the transmission; and wherein the shift forks engage sliding sleeves to control the synchronizing clutches.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |