US3744125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lathe chuck with exchangeable jaws and jaw changing means therefor
Assignee: SMW Schneider and Weisshaupt GmbH
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Filing: 1972-01-31
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Granted: 1973-07-10
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Expires: 1992-01-31
Abstract
Abstract A program-operated machine tool wherein the housing of a rotary lathe chuck carries three radially movable holders for detachable work-engaging jaws. The jaws can be withdrawn axially of the housing in first positions of the holders and are automatically locked to the holders when the holders are moved to second positions. A shiftable magazine on the frame of the machine tool contains a set of pallets at least some of which support groups of differently dimensioned jaws. A transfer device on the frame is movable between several positions to withdraw an empty pallet from the magazine, to move such pallet into alignment with the chuck housing for reception of jaws from the holders, to thereupon move a pallet with a group of different jaws into alignment with the chuck housing, and to place the jaws thereon into optimum positions for locking to the holders.
Inventors
- 👤 E Schalles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:22
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/39; B23B31/10; B23B31/12; B23B31/16; B23B31/1627; B23B31/16279; B23Q; B23Q3/00; B23Q3/02; B23Q3/10; Y; Y10; Y10T; Y10T483/00; Y10T483/17; Y10T483/1702; Y10T483/1707; Y10T483/171; Y10T82/00; Y10T82/25; Y10T82/2514; Y10T82/2516
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
137 words
In a machine tool, particularly in a program-operated machine tool, a combination comprising a frame; a chuck including a housing supported by said frame, a plurality of holders radially movably mounted in said housing, and power-operated means for moving said holders; and automatic changeover means including a magazine for a plurality of groups of jaws, each such group including a discrete jaw for each of said holders, and transfer means for transporting selected groups of jaws between said magazine and said housing for attachment of the jaws of a selected group to said holders or for detachment of a group of jaws from said holders and for the transport of detached jaws into said magazine, said jaws and said holders having complementary coupling elements adapted to separably couple the jaws of a selected group to said holders.
Claim 2
Dependent Claim
137 words
In a machine tool, particularly in a program-operated machine tool, a combination comprising a frame; a chuck including a housing supported by said frame, a plurality of holders radially movably mounted in said housing, and power-operated means for moving said holders; and automatic changeover means including a magazine for a plurality of groups of jaws, each such group including a discrete jaw for each of said holders, and transfer means for transporting selected groups of jaws between said magazine and said housing for attachment of the jaws of a selected group to said holders or for detachment of a group of jaws from said holders and for the transport of detached jaws into said magazine, said jaws and said holders having complementary coupling elements adapted to separably couple the jaws of a selected group to said holders.
Claim 3
Dependent Claim
16 words
A combination as defined in claim 1, wherein said magazine is movably supported by said frame.
Claim 4
Dependent Claim
62 words
A combination as defined in claim 1, wherein said changeover means further comprises a supply of carriers in said magazine and each of said groups of jaws is separably supported by one of said carriers, said transfer means being arranged to transport said groups of jaws together with the respective carriers and at least some of said groups containing differently dimensioned jaws.
Claim 5
Dependent Claim
61 words
A combination as defined in claim 1, wherein said housing is rotatably supported by said frame, the coupling elements of said holders being arranged to engage with the complementary coupling elements of a selected group of jaws in response to movement of said holders with reference to said housing and the selected groups of jaws from first to second predetermined positions.
Claim 6
Dependent Claim
44 words
A combination as defined in claim 4, wherein said holders and said jaws further comprise complementary stop means whereby the stop means of said holders abut against the stop means of a selected group of jaws in said second predetermined positions of said holders.
Claim 7
Dependent Claim
30 words
A combination as defined in claim 5, wherein each of said jaws comprises an elongated key which is provided with the respective coupling elements and with the respective socket means.
Claim 8
Dependent Claim
37 words
A combination as defined in claim 4, wherein said chuck further comprises means for automatically locking the jaws of a selected group to the respective holders in response to movement of said holders to said second positions.
Claim 9
Dependent Claim
61 words
A combination as defined in claim 4, wherein each of said holders has an outer surface provided with a groove extending radially of said housing and each of said jaws comprises a portion which is insertable into and withdrawable from the groove of the respective hOlder in said first position of such holder by moving the jaw axially of said housing.
Claim 10
Dependent Claim
18 words
A combination as defined in claim 8, wherein each of said grooves has a substantially rectangular cross-sectional outline.
Claim 11
Dependent Claim
82 words
A combination as defined in claim 8, wherein said coupling elements are provided on said portions of said jaws and in said grooves of said holders and include at least one first set of protuberances on each of said portions and at least one second set of protuberances in each of said grooves, the protuberances of each first set mating with the protuberances of the respective second set in response to movement of said holders from said first to said second positions.
Claim 12
Dependent Claim
17 words
A combination as defined in claim 10, wherein said protuberances are teeth extending radially of said housing.
Claim 13
Dependent Claim
69 words
A combination as defined in claim 4, wherein said chuck further comprises means for automatically locking the jaws of a selected group to the respective holders in response to movement of said holders to said second postions, including spring-biased locking members provided in said holders and arranged to extend into socket means provided therefor in the respective jaws in response to movement of said holders to said second positions.
Claim 14
Dependent Claim
46 words
A combination as defined in claim 12, wherein each of said jaws further comprises ejector means actuatable to expel from the respective socket means the locking member of the corresponding holder and to thereby free such holder for movement from said second to said first position.
Claim 15
Dependent Claim
48 words
A combination as defined in claim 13, wherein said locking members are reciprocable in the respective holders in parallelism with the axis of said housing and said ejector means are reciprocable in said jaws and register with the respective locking members in the second positions of said holders.
Claim 16
Dependent Claim
58 words
A combination as defined in claim 3, wherein said transfer means is arranged to transport carriers with selected groups of jaws between said magazine and a position of alignment with said housing for attachment of the jaws on a thus transported carrier to said holders subsequent to detachment of a previously utilized group of jaws from such holders.
Claim 17
Dependent Claim
20 words
A combination as defined in claim 15, wherein said magazine and said transfer means are movably mounted on said frame.
Claim 18
Dependent Claim
42 words
A combination as defined in claim 15, wherein said housing is rotatable relative to said frame and said magazine is movable in substantial parallelism with the axis of said housing to place a selected carrier therein into register with said transfer means.
Claim 19
Dependent Claim
55 words
A combination as defined in claim 15, wherein said housing is rotatable relative to said frame and said transfer means comprises a shaft extending in parallelism with the axis of said housing, a transfer member mounted on said shaft for lengthwise and angular movement, and a plurality of carrier-engaging grippers provided on said transfer member.
Claim 20
Dependent Claim
67 words
A combination as defined in claim 18, wherein each of said carriers has a substantially circular outline and is provided with a pair of peripheral recesses located substantially diametrically opposite each other, each of said grippers being of arcuate shape and having a pair of projections receivable in the recesses of a selected carrier in said magazine to thereby releasably secure such carrier to the respective gripper.
Claim 21
Dependent Claim
72 words
A combination as defined in claim 15, wherein the number of said holders exceeds two and said holders are equidistant from each other, each of said carriers comprising a plurality of equidistant sockets for portions of the group of jaws thereon, and guide means for maintaining the jaws thereon in such orientation that each jaw registers with one of said holders when the corresponding carrier is moved into alignment with said housing.
Claim 22
Dependent Claim
12 words
A combination as defined in claim 20, wherein said number is three.
Claim 23
Dependent Claim
25 words
A combination as defined in claim 20, wherein said guide means is provided with detent means for releasaBly engaging the jaws on the respective carrier.
Claim 24
Dependent Claim
53 words
A combination as defined in claim 22, wherein said guide means comprises a pair of rails for each jaw on the respective carrier and said detent means comprises spring-biased detent members provided in at least one of each of said pairs of rails and normally extending into notches provided therefor in said jaws.
Claim 25
Dependent Claim
84 words
A combination as defined in claim 15, wherein said chuck further comprises means for releasably locking the jaws of a selected group to said holders in response to movement of said holders to said second positions, each of said carriers comprising means for disengaging said locking means in response to movement of an empty carrier axially toward said housing so that the jaws supported by said holders can be separated from the holders in response to movement of such holders to said first positions.
Claim 26
Dependent Claim
76 words
A combination as defined in claim 24, wherein said locking means comprises spring-biased locking members reciprocably mounted in said holders and extending into recesses provided therefor in adjacent jaws in response to movement of said holders to said second positions, said disengaging means comprising spring-biased shifting members reciprocably mounted in each of said carriers and arranged to expel said locking members from said recesses in response to axial movement of an empty carrier toward said housing.
Claim 27
Dependent Claim
25 words
A combination as defined in claim 24, wherein each of said carriers comprises signal generating means for indicating the condition of the respective disengaging means.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |