US3687511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for infinitely variable adjustment of the play of an antifriction bearing for a spindle or the like
Assignee: WERKZEUG MAS FAB ADOLF WALDRIC
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Filing: 1971-01-20
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Granted: 1972-08-29
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Expires: 1991-01-20
Abstract
Abstract A device for varying the adjustment of the clearance or play in an antifriction bearing for a machine tool spindle. A sleeve is mounted for both a rotatable and axial movement in a spindle housing. The inner surface of the sleeve has an outer race for a plurality of first rolling bodies. The outer surface of the sleeve adjacent the outer race has a conical shape. A plurality of second rolling bodies are guided obliquely on the conical outer surface at an angle to the axis of rotation of the sleeve. A member having an inner conical surface thereon is secured to the spindle housing and defines the outer race for the second rolling bodies. A rotation of the sleeve will effect an axial movement thereof to change the spacing between the inner and outer conical surfaces.
Inventors
- 👤 Karl Spauschus
- 👤 Brotoharsojo Darmawan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
F; F16; F16C; F16C25/00; F16C25/06; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/262; B23Q1/265; F16C2322/00; F16C2322/39
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
Device for infinitely variable adjustment of the play of an antifriction bearing for a spindle or the like, characterized by a. a sleeve mounted rotatably and for axial displacement in a housing for a spindle or the like, the inner surface of said sleeve carrying the outer raceway for first rolling bodies of the antifriction bearing and the outer surface thereof being of slightly conical form in the region of the antifriction bearing, b. a plurality of second rolling bodies guided obliquely on this conical outer surface at an angle to the axis of rotation of the sleeve, c. an inner cone arranged in the housing parallel to the conical outer surface of the sleeve as the outer raceway for the secOnd rolling bodies, and d. a rotary drive for the sleeve.
Claim 2
Dependent Claim
132 words
Device for infinitely variable adjustment of the play of an antifriction bearing for a spindle or the like, characterized by a. a sleeve mounted rotatably and for axial displacement in a housing for a spindle or the like, the inner surface of said sleeve carrying the outer raceway for first rolling bodies of the antifriction bearing and the outer surface thereof being of slightly conical form in the region of the antifriction bearing, b. a plurality of second rolling bodies guided obliquely on this conical outer surface at an angle to the axis of rotation of the sleeve, c. an inner cone arranged in the housing parallel to the conical outer surface of the sleeve as the outer raceway for the secOnd rolling bodies, and d. a rotary drive for the sleeve.
Claim 3
Dependent Claim
46 words
Device according to claim 1, characterized in that the second rolling bodies are bearing needles the pivots of which are guided so that they are crossed with respect to the axis of rotation of the sleeve by being mounted off-set in a cage at an angle.
Claim 4
Dependent Claim
18 words
Device according to claim 1, characterized in that the crossing angle of the bearing needles is about 1*.
Claim 5
Dependent Claim
44 words
Device according to claim 1, characterized in that helically extending bearing grooves are provided in the outer surface of the sleeve and/or the inner cone and the second rolling bodies are in the form of bearing balls and are guided in these bearing grooves.
Claim 6
Dependent Claim
38 words
Device according to claim 4, characterized in that for returning the bearing balls which emerge at one end of the bearing grooves a return tube leading to the other end of the bearing grooves (40, 41) is provided.
Claim 7
Dependent Claim
26 words
Device according to claim 1, characterized in that the slightly conical outer surface of the sleeve corresponds to the surface of a 1 : 30 cone.
Claim 8
Dependent Claim
22 words
Device according to claim 1, characterized in that the inner cone is arranged on an outer race forced tightly into the housing.
Claim 9
Dependent Claim
78 words
Device according to claim 1 with an arrangement for measuring the change in the play of the antifriction bearing, characterized in that this arrangement has two sensing elements arranged opposite one another in the sleeve immediately adjacent the inner surface thereof, or rather the outer raceway of the rolling bodies, said sensing elements measuring any change in the distance of the sleeve from the inner raceway of the rolling bodies on an inner race of the antifriction bearing.
Claim 10
Dependent Claim
56 words
Device according to claim 8, characterized in that the sensing elements are measuring nozzles fed with compressed air and connected in parallel with one another, the orifices of which are directed at the inner raceway for the rolling bodies and which measure the change in the distance by means of the change in the dynamic pressure.
Claim 11
Dependent Claim
69 words
Device according to claim 9, characterized in that the sleeve has at its end face in the region of the measuring nozzles a coaxial extension in the form of an annular piston which is slidable in sealing relationship in an annular chamber in the housing in communication with a feed duct for the compressed air and has inlets opening at its end face and leading to the measuring nozzles.
Claim 12
Dependent Claim
25 words
Device according to claim 10, characterized in that the annular chamber and the feed duct are arranged in an end cover plate of the housing.
Claim 13
Dependent Claim
92 words
Device according to claim 8 with an arrangement for automatically keeping the play of the antifriction bearing constant, characterized by a comparator to which the actual value of the bearing play determined by the measuring sensing elements or nozzles is supplied for the purpose of comparison with a predetermined desired value and which forms a control signal therefrom, an amplifier for this control signal connected at the output side of the comparator, and a servo motor having a drive pinion which is in mesh with a ring gear arranged on the sleeve.
References Cited (Backward Citations)
US306510A
Cited
US1742512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |