Patent US3974595A successfully refreshed from Google Patents.
US3974595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear grinding machine for spiral bevel gears
Assignee: Renk GmbH
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Filing: 1975-01-31
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Granted: 1976-08-17
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Expires: 1995-01-31
Abstract
Abstract A gear grinding machine for forming spiral bevel gear teeth grinds a curved flank of a tooth in a continuously rotating bevel gear wheel. A slider carrying a grinding disk is adjustably guided on a slide reciprocating along the flank of a tooth at right angles to a guiderail along a path exceeding the maximum length of one of the teeth. The grinding disk is formed as a truncated cone, its frustoconical surface being used for grinding. It is attached to a shaft in a normal or a 180° reversed position and can be positioned along the shaft toward a flank of a tooth. The slide guide rail is disposed on a rocker oscillating in dependence on the desired curvature of a tooth and a motor attached to the sled drives the shaft via a flat belt.
Inventors
- 👤 Albin Wolf
- 👤 Franz Weigant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:16
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/12; B23F23/1225; B23F9/00; B23F9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
In an apparatus for grinding the curved flanks of gear teeth of a bevel gear having means to continuously rotate the gear and means to reciprocate a slider carrying a grinding tool the full length and beyond each tooth while means to oscillatingly rock the slider so as to impart the desired curve to the tooth, the improvement comprising: mounting means for releasably securing said grinding tool on said apparatus in either of a pair of 180° reversed positions, said tool being a rotatable grinding wheel having at least one frustoconical grinding face engageable with a tooth flank and rotatable about an axis; means for displacing said wheel along said axis and securing same at any desired position therealong; and drive means for rotating said grinding wheel including a drive motor carried on said slider, a pulley fixed to said wheel and rotatable about said axis, and a flat belt extending between said motor and said pulley.
Claim 2
Dependent Claim
157 words
In an apparatus for grinding the curved flanks of gear teeth of a bevel gear having means to continuously rotate the gear and means to reciprocate a slider carrying a grinding tool the full length and beyond each tooth while means to oscillatingly rock the slider so as to impart the desired curve to the tooth, the improvement comprising: mounting means for releasably securing said grinding tool on said apparatus in either of a pair of 180° reversed positions, said tool being a rotatable grinding wheel having at least one frustoconical grinding face engageable with a tooth flank and rotatable about an axis; means for displacing said wheel along said axis and securing same at any desired position therealong; and drive means for rotating said grinding wheel including a drive motor carried on said slider, a pulley fixed to said wheel and rotatable about said axis, and a flat belt extending between said motor and said pulley.
Claim 3
Dependent Claim
19 words
The improvement defined in claim 1 wherein said pulley has a generally spherical peripheral surface engaged by said belt.
Claim 4
Dependent Claim
30 words
The improvement defined in claim 2, further comprising a belt tightener mounted on said slider and having a tightening element and a spring urging said tightening element against said belt.
Claim 5
Dependent Claim
30 words
The improvement defined in claim 1 wherein said means for displacing includes a wormgear drive for axially displacing said tool and a clamp for preventing axial displacement of said tool.
Claim 6
Dependent Claim
35 words
The improvement defined in claim 4 wherein said wormgear drive includes a shaft lying on said axis and carrying said shaft and formed with a thread, and an internally threaded element engaging said worm gear.
Claim 7
Dependent Claim
25 words
The improvement defined in claim 1, further comprising truing means on said slider having a truing stone displaceable over said frustoconical surface of said wheel.
Claim 8
Dependent Claim
67 words
The improvement defined in claim 6 wherein said truing means includes a support carrying said stone and adapted for straight-line displacement thereof, a pivot on said support defining a pivot axis therefor perpendicular to the displacement direction of said slider, and a guide comprising a part-circular slot formed in said slider and centered on said pivot axis and lock means for securing said support in said slot.
Claim 9
Dependent Claim
18 words
The improvement defined in claim 7 wherein said support has a holder carrying a pair of such stones.
Claim 10
Dependent Claim
37 words
The improvement defined in claim 1 wherein said apparatus includes a support limitedly pivotal about an axis perpendicular to the rotation axis of the tool and passing through said tool, said slider being mounted on said support.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |