Patent US3667310A successfully refreshed from Google Patents.
US3667310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-tightening transmission gear mounting
Assignee: Robert Bosch GmbH
•
Filing: 1971-01-29
•
Granted: 1972-06-06
•
Expires: 1991-01-29
Abstract
Abstract A drive gear is freely mounted on a drive shaft and meshes with an output gear on an output shaft. The meshing teeth are slanted so that a load on the output shaft and output gear, produces an axial force component on the driven gear, urging the same into frictional engagement with a threaded nut so that the same is held against rotation, and moves axially to press the drive gear into tight engagement with an abutment on the drive shaft while the rotating drive shaft screws a threaded portion thereof into the nut.
Inventors
- 👤 Reinhard Hahner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; B; B24; B24B; B24B23/00; B24B23/02; B24B23/028; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/14; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1966; Y10T74/19665
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
Self-tightening transmission gear mounting, comprising drive shaft means rotating in one direction of rotation and including a cylindrical shaft portion, an abutment at one end, and a threaded portion at the other end of said cylindrical shaft portion; a first gear mounted on said cylindrical portion and having a set of first gear teeth; nut means mounted on said threaded portion adjacent said first gear; and rotary output means including a second gear having a set of second gear teeth meshing with said first gear teeth, at least one of said sets having gear teeth slanted in axial and circumferential directions relative to said one direction of rotation so that said first gear moves in one axial direction along said cylindrical shaft portion into frictional engagement with said nut means when a load acts on said output means and said second gear opposes rotation of said first gear by said drive shaft means whereby said nut means is held by said output means and first gear against rotation and is tightened while said treaded portion of said drive shaft means screws into said nut means and said nut means moves in the opposite axial direction and presses said first gear against said abutment for non-rotatably securing said first gear to said drive shaft means.
Claim 2
Dependent Claim
214 words
Self-tightening transmission gear mounting, comprising drive shaft means rotating in one direction of rotation and including a cylindrical shaft portion, an abutment at one end, and a threaded portion at the other end of said cylindrical shaft portion; a first gear mounted on said cylindrical portion and having a set of first gear teeth; nut means mounted on said threaded portion adjacent said first gear; and rotary output means including a second gear having a set of second gear teeth meshing with said first gear teeth, at least one of said sets having gear teeth slanted in axial and circumferential directions relative to said one direction of rotation so that said first gear moves in one axial direction along said cylindrical shaft portion into frictional engagement with said nut means when a load acts on said output means and said second gear opposes rotation of said first gear by said drive shaft means whereby said nut means is held by said output means and first gear against rotation and is tightened while said treaded portion of said drive shaft means screws into said nut means and said nut means moves in the opposite axial direction and presses said first gear against said abutment for non-rotatably securing said first gear to said drive shaft means.
Claim 3
Dependent Claim
37 words
Gear mounting as claimed in claim 1, wherein said first and second gears are bevel gears; and wherein said drive shaft means and output means are rotatable about two axes extending at right angles to each other.
Claim 4
Dependent Claim
50 words
Gear mounting as claimed in claim 1, wherein the axial length of said first gear is greater than the axial length of said cylindrical shaft portion so that said nut means is on said threaded portion when said first gear abuts said abutment while being engaged by said nut means.
Claim 5
Dependent Claim
24 words
Gear mounting as claimed in claim 3, wherein the diameter of said threaded portion is smaller than the diameter of said cylindrical shaft portion.
Claim 6
Dependent Claim
51 words
Gear mounting as claimed in claim 3, wherein said first gear includes a hub portion having said axial length of said first gear, and wherein said hub portion has annular abutment surfaces on opposite sides of said hub portion engaging said nut means and said abutment on said drive shaft, respectively.
Claim 7
Dependent Claim
27 words
Gear mounting as claimed in claim 5, wherein said annular abutment surfaces are planar and located in planes perpendicular to the axis of said cylindrical shaft portion.
Claim 8
Dependent Claim
52 words
Gear mounting as claimed in claim 1, wherein said drive shaft means includes a journal portion adjacent said one end of said cylindrical shaft portion; and comprising a ball bearing having an inner ring secured to said journal portion and forming said abutment at said one end of said cylindrical shaft portion.
Claim 9
Dependent Claim
25 words
Gear mounting as claimed in claim 1, wherein said first and second teeth of said first and second gear are both axially and circumferentIally slanted.
Claim 10
Dependent Claim
44 words
Gear mounting as claimed in claim 8, wherein said first teeth are slanted and curved along circles in one circumferential direction; and wherein said second teeth are slanted and curved in the opposite circumferential direction as viewed from the center of the respective gear.
Claim 11
Dependent Claim
68 words
Gear mounting as claimed in claim 1, further comprising a motor having a motor shaft connected with said drive shaft means for rotation, and driving the same only in said one direction; wherein said output means include a rotary tool; and wherein said output means with said tool, and said motor shaft with said drive means are rotatable about two axes extending at right angles to each other.
References Cited (Backward Citations)
US3563353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |