Patent US5205179A successfully refreshed from Google Patents.
US5205179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed changing device
Assignee: INA Waelzlager Schaeffler OHG
•
Filing: 1992-09-23
•
Granted: 1993-04-27
•
Expires: 2012-09-23
Abstract
Abstract A speed changing device for a gear box, particularly for a toothed change speed gear of a motor vehicle in which a gear wheel, freely rotatable on a driven shaft can be coupled with the driven shaft by means of an axially displaceable claw ring and a toothed bushing, the claw ring being axially displaceable by an electric driving device via a gearshift fork, arranged on a selector shaft which is parallel to the driven shaft, characterized in that the gearshift fork is axially displacable on the associated stationary selector shaft by a spindle drive comprising an externally threaded section arranged on the selector shaft and an internally threaded section, the axes of both threaded sections being arranged on the axis (D 1 ), of the selector shaft and one of the threaded sections being actuatable by rotation by an electromotor.
Inventors
- 👤 Joachim Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:30
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/304; F16H2063/3079; F16H63/32; F16H2063/321; F16H61/00; F16H61/26; F16H61/28; F16H61/32; F16H63/08; F16H63/16; F16H63/18; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19744; Y10T74/19781
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
180 words
A speed changing device for a toothed change speed gear (1) of a motor vehicle in which a gearwheel (6) freely rotatable on a driven shaft (3) can be coupled with the driven shaft (3) by an axially displaceable claw ring (5) and a toothed bushing (8), the claw ring (5) being axially displaceable by a one-piece gearshift fork (12) which is actuated by an electric driving means and is arranged on a selector shaft (11) which extends parallel to the driven shaft (3), characterized in that the gearshift fork (12) is axially displaceable by a spindle drive (16) which radially surrounds only the associated unrotatable selector shaft (11), the spindle drive (16) comprises an externally threaded section (17) arranged on the selector shaft (11) and an internally threaded section (18), a longitudinal axis D1 of the selector shaft (11) coincides with longitudinal axes of the components carrying the externally and internally threaded sections, one of the externally threaded section and internally threaded section (17, 18) being actuatable by an electromotor (19) integrated and mounted in the gearshift fork (12).
Claim 2
Dependent Claim
180 words
A speed changing device for a toothed change speed gear (1) of a motor vehicle in which a gearwheel (6) freely rotatable on a driven shaft (3) can be coupled with the driven shaft (3) by an axially displaceable claw ring (5) and a toothed bushing (8), the claw ring (5) being axially displaceable by a one-piece gearshift fork (12) which is actuated by an electric driving means and is arranged on a selector shaft (11) which extends parallel to the driven shaft (3), characterized in that the gearshift fork (12) is axially displaceable by a spindle drive (16) which radially surrounds only the associated unrotatable selector shaft (11), the spindle drive (16) comprises an externally threaded section (17) arranged on the selector shaft (11) and an internally threaded section (18), a longitudinal axis D1 of the selector shaft (11) coincides with longitudinal axes of the components carrying the externally and internally threaded sections, one of the externally threaded section and internally threaded section (17, 18) being actuatable by an electromotor (19) integrated and mounted in the gearshift fork (12).
Claim 3
Dependent Claim
45 words
A speed changing device of claim 1 wherein the internally threaded section (18) is provided on an actuatable sleeve (23) which is mounted so as to be axially displaceable and rotatable on the externally threaded section (17) which is provided on the selector shaft (11).
Claim 4
Dependent Claim
76 words
A speed changing device of claim 1 wherein the externally threaded section (17) is part of a hollow cylindrical pipe section (41) which is rigidly connected with the unrotatable selector shaft (11), and the actuatable sleeve (23) comprising the internally threaded section (18) is arranged so as to be axially displaceable and rotatable on the externally threaded section (17) and is connected with the gearshift fork (12) so as to be relatively rotatable but axially fixed.
Claim 5
Dependent Claim
36 words
A speed changing device of claim 1 wherein the spindle drive (16) comprising the externally and internally threaded sections (17, 18) is a rolling bearing screw drive, a ball screw drive or a roller screw drive.
Claim 6
Dependent Claim
29 words
A speed changing device of claim 1 wherein the thread of the internally and externally threaded sections (17, 18) is an easy-running thread which operates in the self-locking range.
Claim 7
Dependent Claim
35 words
A speed changing device of claim 3 wherein the electromotor (19) is designed as a hollow shaft motor comprising a stator (20) and a rotor (21), the rotor (21) being constituted by the sleeve (23).
Claim 8
Dependent Claim
24 words
A speed changing device of claim 6 wherein the rotor (21) of the hollow shaft motor is arranged coaxially inside or outside the stator.
Claim 9
Dependent Claim
28 words
A speed changing device of claim 7 wherein the stator (20) of the hollow shaft motor is integrated in a bore (24) of the gear shift fork (12).
Claim 10
Dependent Claim
27 words
A speed changing device of claim 7 wherein the stator (20) of the hollow shaft motor is connected unrotatably and axially rigidly with the selector shaft (11).
Claim 11
Dependent Claim
27 words
A speed changing device of claim 7 wherein a part of a cylindrical pipe section (41) is designed as a stator (20) of the hollow shaft motor.
Claim 12
Dependent Claim
23 words
A speed changing device of claim 6 wherein the rotor (21) of the hollow shaft motor is made of a permanently magnetic material.
Claim 13
Dependent Claim
27 words
A speed changing device of claim 6 wherein the rotor (21) is mounted on the stator (20) by the means of two deep groove ball bearings (25).
Claim 14
Dependent Claim
21 words
A speed changing device of claim 12 wherein the deep groove ball bearings (25) are designed as angular contact ball bearings.
Claim 15
Dependent Claim
31 words
A speed changing device of claim 12 wherein an outer race groove (37) is part of the stator (20) and an inner race groove (38) is formed on the rotor (21).
References Cited (Backward Citations)
US2604788A
Cited
US2649813A
Cited
US2821089A
Cited
US3277734A
Cited
US3407680A
Cited
US4019616A
Cited
US4449416A
Cited
US4614128A
Cited
US4938088A
Cited
US4873881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |