US3760490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool having tool changer
Assignee: BURGMASTER - HOUDAILLE Inc A CORP OF
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Filing: 1971-07-13
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Granted: 1973-09-25
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Expires: 1991-07-13
Abstract
Abstract A machine tool includes a head which supports a vertically movable quill within which there is disposed a rotatable spindle to which various kinds of cutting tools may be attached. A pair of tool storage magazines are respectively disposed at opposite sides of the quill for rotation about a common horizontal axis. A pair of tool transfer arms are independently supported on the head, and each has gripping means that are movable between a first position where a tool held thereby is aligned with the spindle, and a second position where a tool can be transferred to or from one of the storage magazines. The spindle is driven through a two-ratio gear train that includes clutches for respectively selecting one of the speed ratios. On energization of both clutches, they jointly serve as a spindle brake. The quill is driven vertically by means that are concentric with the rotational axis of the spindle.
Inventors
- 👤 F Burg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:56
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/155; B23Q3/157; B23Q3/15713; Y; Y10; Y10T; Y10T483/00; Y10T483/17; Y10T483/1733; Y10T483/1748; Y10T483/175; Y10T483/1752; Y10T483/18; Y10T483/1809
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
159 words
A machine tool comprising: a. a head; b. a rotatably-driven axially-movable spindle slidably mounted on said head and adapted to drivably carry a tool; c. a pair of spaced tool storage magazines having said spindle disposed therebetween and mounted on said head for driven rotation about a common axis lying in a plane perpendicular to the rotational axis of said spindle and each adapted to store a series of tools; d. a pair of separate tool transfer arms, one for each said magazine and each mounted on said head in spaced relation to each other for driven movement between first and second positions; and e. gripping means on each of said transfer arms oriented to hold a tool coaxially with the rotational axis of said spindle when the associated transfer arm is in its said first position, and oriented to grip a tool in its tool storage magazine when the associated transfer arm is in its said second position.
Claim 2
Dependent Claim
159 words
A machine tool comprising: a. a head; b. a rotatably-driven axially-movable spindle slidably mounted on said head and adapted to drivably carry a tool; c. a pair of spaced tool storage magazines having said spindle disposed therebetween and mounted on said head for driven rotation about a common axis lying in a plane perpendicular to the rotational axis of said spindle and each adapted to store a series of tools; d. a pair of separate tool transfer arms, one for each said magazine and each mounted on said head in spaced relation to each other for driven movement between first and second positions; and e. gripping means on each of said transfer arms oriented to hold a tool coaxially with the rotational axis of said spindle when the associated transfer arm is in its said first position, and oriented to grip a tool in its tool storage magazine when the associated transfer arm is in its said second position.
Claim 3
Dependent Claim
23 words
A machine tool according to claim 1 in which the spindle axis is vertical and said common axis of said magazines is horizontal.
Claim 4
Dependent Claim
25 words
A machine tool according to claim 1 in which the spindle axis and the common axis of said magazines lie in a single vertical plane.
Claim 5
Dependent Claim
62 words
A machine tool according to claim 1 in which at least one of said magazines comprises a circular disc having peripheral pockets opening radially outwardly, there being a resiliently loaded detent mechanism for each pocket for holding a tool therein, each said detent mechanism being overriden by fOrce from the associated transfer arm during transfer of a tool at the respective pockets.
Claim 6
Dependent Claim
28 words
A machine tool according to claim 4 including means in each of said pockets for locating the tool in a predetermined angular position about the tool''s rotational axis.
Claim 7
Dependent Claim
17 words
A machine tool according to claim 5 in which said locating means comprises a radially projecting pin.
Claim 8
Dependent Claim
48 words
A machine tool according to claim 4 in which said detent mechanism is a yieldably biased lever pivoted at one end on said magazine, its opposite end having surfaces disposed to partially close said pocket and to engage the tool during tool storage and during tool transfer, respectively.
Claim 9
Dependent Claim
72 words
A machine tool according to claim 7 in which each of the levers of the detent mechanisms has a projection that extends beyond said circular disk, and a tool release arm carried on said head and movable from a retracted position to a position of engagement with one of said projections on one of said levers to move said one lever against its bias for facilitating manual tool transfer at a pocket.
Claim 10
Dependent Claim
26 words
A machine tool according to claim 4 including a tool release arm on said head and engageable with each of said detent mechanisms to override it.
Claim 11
Dependent Claim
66 words
A machine tool according to claim 1 including: a. at least one hub fixed at one end to said head; b. a flange fixedly secured to the opposite end of said hub; c. one of said tool storage magazines being rotatably carried on said hub and having a ring gear thereon; and d. a motor secured to said flange in driving engagement with said ring gear.
Claim 12
Dependent Claim
60 words
A machine tool according to claim 10, including: a. an actuator secured to said flange; b. a reciprocable shot pin connected to said actuator; and c. a series of holes in said tool storage magazine, each receptive of said shot pin and each adapted to locate one of the series of tools to be acted on by said gripping means.
Claim 13
Dependent Claim
62 words
A machine tool according to claim 1, including: a. a quill rotatably supporting said spindle and slidably mounted on said head for enabling the axial movement of said spindle; and b. cam and switch means carried by said quill and said head and responsive to the axial position of said quill and forming part of control means for moving said quill axially.
Claim 14
Dependent Claim
25 words
A machine tool according to claim 12, including a frame slidably supporting said head for vertical movement parallel to the axial movement of said quill.
Claim 15
Dependent Claim
37 words
A machine tool according to claim 13 in which said control means is responsive to both the axial position of said quill and in combination with the vertical position of said head to control the quill movements.
Claim 16
Dependent Claim
40 words
A machine tool according to claim 1 in which each of said transfer arms has a separate pivotal connection with said head, a portion of said arm being substantially vertical in said first position and horizontal in said second position.
Claim 17
Dependent Claim
46 words
A machine tool according to claim 1 in which each of said transfer arms is separately pivoted at one end on said head, and carries said grippingmeans at the opposite end; and each arm having a separate fluid actuator acting between said head and said arm.
Claim 18
Dependent Claim
32 words
A machine tool according to claim 16 in which said fluid actuator has a cylinder pivoted on said head and a rod connected to said arm intermediate the ends of said arm.
Claim 19
Dependent Claim
87 words
A machine tool according to claim 1 in which at least one of said transfer arms has a pivotal connection with said head for the support of the transfer arm, said connection being axially fixed with respect to said storage magazine, said gripping means on said one arm being hydraulically actuatable, and including relatively rigid hydraulic tubing leading from said head to said gripping means on said one arm, said hydraulic tubing being connected to a rotary coupling fluidly independent of and concentric with said pivotal connection.
Claim 20
Dependent Claim
26 words
A machine tool according to claim 18 in which said pivotal connection and said rotary coupling have fixed portions joined together, and rotatable portions joined together.
Claim 21
Dependent Claim
83 words
A machine tool according to claim 1 in which said gripping means comprises: a. a pair of comovable coacting fingers each having a tool-engaging portion; b. means supporting said fingers and enabling their movement to a tool gripping and holding position in said second transfer arm position, their maintaining said holding position in said first transfer arm position, and their movement to a tool releasing position upon return to said second transfer arm position; and c. means for moving said fingers simultaneously. casing,
Claim 22
Dependent Claim
25 words
A machine tool according to claim 20, in which said gripping means has a casing, each of said fingers being pivotably supported on said casing.
Claim 23
Dependent Claim
45 words
A machine tool according to claim 21, in which said tool engaging portion of each finger is at one end thereof, in which the pivotable support is at the other end thereof, each finger having an intermediate portion which crosses over that of the other.
Claim 24
Dependent Claim
29 words
A machine tool according to claim 21 which includes gear teeth on each of said fingers meshed together, said moving means acting directly on only one of said fingers.
Claim 25
Dependent Claim
24 words
A machine tool according to claim 23, said moving means having teeth acting directly on said gear teeth of said one of said fingers.
Claim 26
Dependent Claim
38 words
A machine tool according to claim 20, in which said moving means comprises a hydraulic actuator and including a spring biasing the piston of said actuator in a direction to bias said fingers toward one of their positions.
Claim 27
Dependent Claim
83 words
A machine tool according to claim 21, in which the pivotal support for one of said fingers is provided by a shaft having a bearing portion supported by a bearing in said casing, said casing bearing having at least one air conduit extending radially therethrough, and said bearing portion having an air vent and an imperforate portion alternatively alignable with said air conduit when said shaft is in a predetermined angular position, whereby an actual position of said gripping means may be sensed.
Claim 28
Dependent Claim
41 words
A machine tool according to claim 1, including: a. a spindle motor secured to said head; b. a gear corotatably secured to said slidable spindle; and c. a gear train having clutch means connecting said spindle motor to said spindle gear.
Claim 29
Dependent Claim
49 words
A machine tool according to claim 27, including: a. a quill rotatably supporting said spindle and slidably mounted on said head for enabling the axial movement of said spindle; and b. said gear train including a splined shaft and nut connection eccentric to the rotational axis of said spindle.
Claim 30
Dependent Claim
66 words
A machine tool according to claim 28, including: a. a quill motor secured to said head; b. a threaded nut and screw connection having one portion thereof coaxially and non-rotatably secured to said quill; and c. a driving connection between said quill motor and a rotatable portion of said threaded screw and nut connection, whereby force for advancing said quill is applied concentrically with the tool.
Claim 31
Dependent Claim
23 words
A machine tool according to claim 29, including a brake operatively connected to said rotatable portion of said threaded screw and nut connection.
Claim 32
Dependent Claim
30 words
A machine tool according to claim 29, including a reader connected to said rotatable portion of said threaded screw and nut connection for providing position signals to a control system.
Claim 33
Dependent Claim
34 words
A machine tool according to claim 28, including track means on said head engaged by roller means on said quill for restraining said quill against angular movement about the rotational axis of said spindle.
Claim 34
Dependent Claim
76 words
A machine tool according to claim 27 in which said gear train includes: a. a first branch of gearing connected to said spindle motor for being continually driven thereby; b. a second branch of gearing connected to said spindle gear; and c. two clutches connecting said branches toGether such that actuation of one clutch effects one spindle speed, actuation of the other clutch effects a second spindle speed, and actuation of both clutches effects spindle braking.
Claim 35
Dependent Claim
29 words
A machine tool according to claim 27, including an indicator means connected to be rotated whenever said spindle gear is rotated for indicating the angular position of said spindle.
Claim 36
Dependent Claim
49 words
A machine tool according to claim 1, including: a. a quill rotatably supporting said spindle and slidably mounted on said head for enabling the axial movement of said spindle; and b. clamp means on said head and encircling said quill adjacent to where said quill emerges from said head.
Claim 37
Dependent Claim
47 words
A machine tool according to claim 35 in which said clamp means comprises a split ring encircled by a clamp ring, there being a frusto-conical surface on at least one of said rings engaged by the other of said rings, and means for moving said clamp ring.
Claim 38
Dependent Claim
49 words
A machine tool according to claim 35 in which said clamp ring comprises a split ring encircled by a clamp ring, said rings having mating frustoconical surfaces, said clamp ring having a tubular piston integral therewith received in a complementally shaped cylinder bore in said head for being pressurized.
Claim 39
Dependent Claim
21 words
A machine tool according to claim 37 including return means acting between said head and at least one of said rings.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |