With Means To Axially Shift Shaft Patents (Class 74/826)
  • Patent number: 8893362
    Abstract: A turret tool holder, having structure capable of easily avoiding unnecessary free rotation of a turret, is provided. When a linearly movable shaft is moved toward a turret head section by driving a servomotor, an annular movable coupling element arranged in the turret begins to disengage from an annular fixed coupling element fixed to a support. While the movable coupling member is still engaged with the fixed coupling member, clutch teeth of a clutch member are engaged with other clutch teeth. Therefore, even when the annular movable coupling element is disengaged from the annular fixed coupling element, the turret is prevented from freely rotating by the engaged clutch teeth.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: November 25, 2014
    Assignee: Citizen Machinery Miyano Co., Ltd.
    Inventor: Atsushi Aoyagi
  • Patent number: 8425386
    Abstract: A tool changer for machine tools, the tool changer having at least one rotatable tool gripper, a supporting column for the tool gripper which can be lifted and lowered and rotated about a rotational axis, a mechanical cam gear for generating the lifting and rotating movements of the tool gripper, all driven by a drive motor connected to a cam barrel and intermediate gearing. The cam barrel has a tappet for the rotational drive of the tool gripper on its upper front and a cam curve or groove on its peripheral surface for the lifting movement of the tool gripper. The tappet drives a Maltese wheel supported on a shaft parallel to the rotational axis of the tool gripper. The Maltese wheel, the cam barrel, and the supporting column of the tool gripper are successively supported in a manner parallel to the axis.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: April 23, 2013
    Assignee: Deckel Maho Seebach GmbH
    Inventors: Udo Tüllmann, Stephan Kümmel, Andreas Kretzschmar
  • Publication number: 20080295644
    Abstract: A power transmission apparatus including a rotary unit (10) rotated by receiving the turning effort and a nut member (3) for coupling the rotary unit (10) to a rotary shaft (4) of a rotary device is disclosed. The nut member (3) has a central hole (3e) formed therethrough from one end surface (3c) to the other end surface (3d) thereof and an internally threaded portion (3g) formed in the central hole (3e). The internally threaded portion (3g) is forced onto an externally threaded portion (4b) formed on the rotary shaft (4) from the other end surface (3d) side thereby to be screwed to the rotary shaft (4) while at the same time coupling the rotary unit (10) to the rotary shaft (4). The apparatus further includes a cap (5) fitted onto the nut member (3) in such a manner as to cover and seal one end surface (3c) of the nut member and an outer peripheral surface (3i) of the nut member connected to the peripheral edge of the one end surface (3c).
    Type: Application
    Filed: May 29, 2008
    Publication date: December 4, 2008
    Applicant: DENSO CORPORATION
    Inventors: Yoshiki Tada, Michiyasu Nosaka, Hiromasa Tanaka, Keiji Ishikawa
  • Patent number: 7275460
    Abstract: A rotary indexing device for use in a group of treatment stations, includes at least one respective tensioning device for exchangeable tool holders disposed in a treatment zone. The rotary indexing machine has a rotary indexing unit with a lift-and-turn device on which support elements for tool holders are disposed. The lift-and-turn device of the rotary indexing unit is provided with a piston rod on which a first coupling element is mounted in a rotationally fixed manner. The first coupling element can be engaged with a further coupling element disposed above it by the lift stroke of the piston rod. The coupling element encloses the piston rod and is driven by a motor. The piston rod is rotationally fixed during the lift stroke.
    Type: Grant
    Filed: December 1, 2001
    Date of Patent: October 2, 2007
    Assignee: WEMA Vogtland GmbH
    Inventor: Albert Gunter
  • Patent number: 7143665
    Abstract: An improved mechanical-hydraulic device for controlling the locking and unlocking movements of a rotary disk—ring gear system comprises a mechanical screw and screw-nut assembly for driving the disk between a locking position, and an unlocking position, and a cooperating hydraulic assembly for controlling the engagement force of the ring gears and accordingly the locking force of the rotary disk to perform high speed and safe locking and unlocking movements of the rotary disk.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: December 5, 2006
    Inventor: Ignazio Ettori
  • Patent number: 7137180
    Abstract: A turret for a machine tool is provided with: a turret body; a swiveling drum on which a tool holder for holding the rotating tool is mountable; a swiveling and indexing drive portion for swiveling the swiveling drum with a swiveling and indexing motor and for indexing any desired rotating tool; and a rotational driving motor, having a rotating shaft directed to an index position, incorporated into the swiveling drum and supported to the turret body. Under the condition that the rotating tool is indexed, a holder shaft of the tool holder of the rotating tool and the rotating shaft are coupled directly with each other and thereby the rotating tool is rotated by the rotational driving motor. Thus, when the rotating tool is drivingly rotated, the power transmission efficiency for rotational drive is high to thereby make it possible to reduce the heat generation, vibration and noise.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: November 21, 2006
    Assignee: Mori Seiki Co., Ltd.
    Inventors: Mitsuji Matsumoto, Haruki Ishiguro
  • Patent number: 7084533
    Abstract: A dual-function, three-axis positioning system having a high precision z-theta state with a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis and a second horizontal translation axis (x-axis) comprises parallel spaced apart linear translation states, a first carriage supported between the parallel translation stages, and a rotation stage carried by the carriage between the parallel translation stages. A removable or permanently fixed second carriage is mounted on or being part of the first carriage.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: August 1, 2006
    Assignee: Aerotech, inc.
    Inventors: Stephen J. Botos, Brian P. O'Connor
  • Patent number: 7010839
    Abstract: A tool turret mechanism includes internal and external tool turrets, a toothed ring secured to the internal tool turret, a central shaft secured to the external turret, a power switch, and a clutch; the central shaft has a piston fitted thereto; the power switch is used for providing power to the internal and the external turrets through the toothed ring and the shaft respectively; the clutch includes a fixed clutch claw, external and internal ring clutch claws, which are respectively securely connected to inner edge of the internal turret, and inner edge of the external turret; the ring clutch claws will rotate, and engage each other; when the piston is actuated, and displaced, the external turret will be forced to change position, and both the turrets will be left and right displaced between a first position, in which they engage the clutch, and a second position, in which they disengage the clutch.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: March 14, 2006
    Assignee: Factory Automation Technology Co., Ltd.
    Inventor: Yung-Hsiang Lu
  • Patent number: 6938312
    Abstract: A work pallet that is arranged to be simple in construction capable of machining five faces of a work by rotating it around the axis of rotation. A work pallet (4) comprises a base body (5) detachably fixed to the table (3) of a machine-tool (1), a pallet main body (6) fixed on the top face of this base body (5), and a work setting face forming body (7), provided on this pallet main body (6) in a way to turn around the rotational axis (20) and having a work setting face (21a) for fixing a work (2), and the pallet main body (6) is provided with a clamping mechanism (31) for releasably fixing the work setting face forming body (7), and a rotational driving mechanism (32) for rotationally driving the work setting face forming body (7) around the rotational axis (20).
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: September 6, 2005
    Assignee: Pascal Engineering Corporation
    Inventor: Ichiro Kitaura
  • Patent number: 6666109
    Abstract: A worm shaft having a worm thereon, a worm wheel meshed with the worm, and a motor for driving the worm shaft are provided. The worm shaft and a shaft of the motor are connected together directly without interposing a rotation transmission mechanism, such as a gear therebetween. Both end portions of the worm shaft are supported rotatably on bearings. The bearing for one end portion of the worm shaft is provided on a body frame, and the bearings provided on the side of the motor shaft are fixed to a cylindrical fitting portion of the retainer member to which the motor is fixed.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: December 23, 2003
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventor: Toshi Kitagawa
  • Patent number: 6609441
    Abstract: A turret tool rest (14) includes a turret (24) movably supported on a base (22), on which desired tools can be mounted at predetermined indexable angled positions. A pair of coupling elements (66, 68), which can be engaged with each other, are arranged between the base (22) and the turret (24). The coupling elements (66, 68) are moved between an engaged position at which they are mutually engaged to fixedly hold the turret at respective indexed positions on the base, and a disengaged position at which they are mutually disengaged to permit the turret to be rotationally indexed. A spring-loaded plunger unit (80) serves to prevent the turret (24) from freely rotating on the base (22),until the coupling elements (66, 68) are fully engaged with each other, during the moving operation of the coupling elements between the engaged and disengaged positions.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: August 26, 2003
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Kenji Sugimoto, Hiroshi Shinohara, Wolfgang Pfeifer
  • Patent number: 6453773
    Abstract: An elevation and index apparatus of a water hydraulic driven type has a rotary table (5) supported pivotally by a cross roller bearing (15), a water hydraulic motor (9) and a water hydraulic cylinder (8), each fixed to a table base (14) supporting a power transmission mechanism and the cross roller bearing (15), a main elevation shaft (7) connected to an output shaft of the water hydraulic cylinder (8), an elevation and index table (1) connected to the main elevation shaft (7) through a bearing (7a) and connected to the rotary table (5) so as to restrict pivotal movement, and a casing (18) disposed outside the table base (14) and enclosing the power transmission mechanism.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: September 24, 2002
    Assignees: Ebara Corporation, Mayekawa Manufacturing Co., Ltd.
    Inventors: Yoshihiro Mochizuki, Chishiro Yamashina, Tamami Takahashi, Shimpei Miyakawa, JPX Mammoto, Ryuji Kodama
  • Patent number: 6438813
    Abstract: A rotary drive adapted to perform a speed of rotation switching of a tool holding device, comprising an output drive shaft bearing the tool holding device, said output drive shaft being able to be moved into first and second axial positions by means of a setting drive. The output drive shaft is coupled in the first axial position with a power driven first drive gear wheel and in the second axial position with a concentric tubular shaft, which is adapted to be driven by a power driven second drive gear wheel by way of a worm drive.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: August 27, 2002
    Assignee: Maschinenfabrik Berthold Hermle AG
    Inventor: Franz-Xaver Bernhard
  • Patent number: 6427554
    Abstract: An axial displacement mechanism for precisely adjusting the axial displacement of a turret plate relative to a turret table is disclosed. Turret tables are commonly used to support a workpiece such as the hollow tubular section of a tin box immediately prior to the seaming of a lid thereto and are commonly angularly indexed between a plurality, usually four, separate work stations disposed above the turret plate. The turret table is rigidly secured to a frame while the turret plate must be capable of being axially displaced relative thereto to suit a variety of different components. The turret plate is rigidly secured to an annular bush through a central aperture of which passes a cylindrical screw, the threads of which engage in corresponding threads in the inner annular surface of the bush. The screw abuts an axially fixed portion secured to or being a drive spindle which imparts motion to said fixed portion, said annular bush and said screw to cause the turret plate to rotate.
    Type: Grant
    Filed: May 27, 2000
    Date of Patent: August 6, 2002
    Assignee: Meltog Limited
    Inventor: Collin Nicholas McConnell
  • Patent number: 6240807
    Abstract: An indexing apparatus for selectively indexing a payload about an axis. The apparatus includes a housing that supports an indexable support table. A second retainer is provided on the indexable support table that is adapted to selectively axially engage a first retainer on the housing to lock the indexable support table in any one of a plurality of selected rotational positions about the axis. The apparatus also includes an axial displacement member that is movably supported within the housing to selectively engage the indexable support table while the indexable support table is locked in any one of the preselected rotational positions. Thereafter, the axial displacement member biases the indexable support table in a first axial direction out of the locked position and applies a rotational force to the indexable support table to rotate it a desired amount about the axis.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: June 5, 2001
    Assignee: Chick Workholding Solutions, Inc.
    Inventors: Helmut Hebener, Jeffrey M. Warth
  • Patent number: 6170358
    Abstract: An indexing mechanism is provided to enable discrete angular displacement of a first body 10 relative to a second body 12. An intermediate body 22 is provided, and is rotatable relative to both the first and second bodies 10,12. Mutually engageable detent elements on the first and intermediate 10,22, and intermediate and second 22,12 bodies, provide indexing of the first body 10 relative to the intermediate body 22 and the intermediate body relative to the second body 12 respectively. The angular separations of adjacent indexed positions provided by the first and second sets of detent elements differ such that the first body 10 is indexable relative to the second body 12 in finer indexing increments than are provided by either the first or second detent elements individually.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: January 9, 2001
    Assignee: Reinshaw PLC
    Inventors: Stephen P Hunter, Colin M Felgate
  • Patent number: 6080039
    Abstract: A machine tool comprising a bed, a worktable movable relative to the bed along a linear path and a tool movable to engage a workpiece on the worktable wherein drive means for effecting the movement of the worktable relative to the bed and therefore to the tool comprises a friction drive so as to provide a smooth carriage motion to the worktable. The worktable may be slidable along a slideway which defines the linear path for the worktable and the drive means therefor comprises an elongate member forming a track mounted parallel to the slideway. Wheel means frictionally engages the track and is carried by drive means therefor mounted on the worktable so that the axis of rotaion of the wheel means is fixed in relation to the worktable.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: June 27, 2000
    Assignee: Unova U.K. Ltd.
    Inventors: Christopher David Bartlett, Michael Laycock, Peter Brian Leadbeater
  • Patent number: 6053075
    Abstract: A device for controlling the locking and unlocking operations of a gear wheel-rotary disc assembly comprises a ball for circulating screw having one end thereof coupled to a rotating coupling member. The screw is in turn rotatably engaged in a fixed ring-nut, which is housed in the bed of the device, to allow the screw to be axially driven, under the control of a driving motor.With respect to prior like devices, the inventive device allows the rotary disc to be driven quicker and more accurately from a locking position to an unlocking position thereof.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: April 25, 2000
    Inventor: Oscar Porta
  • Patent number: 5806367
    Abstract: An intermittent indexing apparatus has a simple structure of supporting portions for bearings without requiring complicated manufacturing processes. The intermittent indexing apparatus includes input shaft, an output shaft, and a housing. An indexing cam is provided on the input shaft and engages cam followers disposed on the peripheral surface of a turret fixed to the output shaft. Opposite ends of the input shaft and the output shaft are rotatably supported by respective first and second pairs of bearings in the housing. First and second openings are formed through opposite side walls of the housing. The second pair of bearings are enabled to slide in an axial direction of the output shaft for positioning. The first opening has a sufficient diameter for introducing therethrough the output shaft with the cam followers.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: September 15, 1998
    Assignee: Sankyo Manufacturing Co., Ltd.
    Inventor: Heizaburo Kato
  • Patent number: 5758399
    Abstract: A tool turret has a turret housing and a hollow supporting column. A head is provided at one end of the supporting column. The other end of the supporting column is connected with the turret housing. A tool face is mounted rotatably relative to the head and is lockable with this head. The tool face has at least one recess for a tool. A torque overload protection arrangement is provided between the hollow supporting column and the head and/or between the hollow supporting column and the turret housing.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: June 2, 1998
    Assignee: Sauter Feinmechanik GmbH
    Inventors: Detlef Dieter Sahm, Alfred E. Muller, Peter Quass
  • Patent number: 5628104
    Abstract: The invention describes a machine tool with a turntable, which has an upper part with a mounting plate which is arranged so as to pivot with respect to a stationary lower part, and is connected to at least one line to deliver fluids or electrical or mechanical energy to the upper part. The lines are brought in from below through the lower part and can be connected by means of coupling means to the upper part, from where they are connected with connection modules that are arranged on the mounting plate. Serration gear is preferably provided to position the upper part on the lower part, so that each pivoting operation is preceded by a lifting operation and ends with a lowering operation. Preferably, lifting and lowering simultaneously open and close, respectively, the coupling modules.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: May 13, 1997
    Assignee: Chiron-Werke GmbH & Co. KG
    Inventors: Eugen R utschle, Hans-Henning Winkler
  • Patent number: 5341702
    Abstract: A system for calibrating a rotary table (10) includes an indexing table (20) (which is a Hirth coupling table) and an angular interferometer (100), together with a control (200). The indexing table is mechanically coupled to the rotary table (this being the only connection between the rotary table to be calibrated and the calibration system), and the interferometer is set up to measure rotation of the indexing table. During rotation of the rotary table (10) to a target angle, the control (200) monitors the interferometer reading, and when this reading exceeds a predetermined threshold, actuates a drive motor (240) of the table (20) to counter rotate the table, thereby to maintain the optics (106) of the interferometer in alignment with the laser beams (L2, L3) and thus enable continuous measurement of the position of the indexing table.
    Type: Grant
    Filed: April 13, 1993
    Date of Patent: August 30, 1994
    Assignee: Renishaw Transducer Systems Limited
    Inventors: Raymond J. Chaney, Jeffrey Graham
  • Patent number: 5297454
    Abstract: A device for rotationally indexing an indexing table by utilizing a synchronized tap function of a machine tool main spindle. The rotation and the axial feeding displacement of the main spindle are in a specific synchronized relation. When the main spindle is fed forward, it engages an input shaft of the indexing device and thrusts it to retract against a spring force. Upon arriving at a retracted position of the input shaft, the main spindle starts rotation in one direction. Because of a one-way clutch between the input shaft and the indexing table, the rotation of the input shaft imparted by the main spindle is not transmitted to the indexing table. After a predetermined angular rotation and an axial feed, the main spindle is rotated in the reverse direction to be withdrawn axially. At this time the one-way clutch operates to transmit the reverse rotation to the indexing table. The indexing device is of compact construction and ensures accurate indexing.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: March 29, 1994
    Assignee: Howa Machinery, Ltd.
    Inventor: Toshio Ito
  • Patent number: 5271134
    Abstract: A tool turret has a hydraulically slidable interlocking or clamping member in alignment with the rotary axis of the turret head for interlocking or clamping the turret head to the housing and for charging the turret head with an axially reactive force by hydraulic pressure working on the interlocking or clamping member. The axially reactive force counters the axial force exerted by the interlocking or clamping member on the turret head. A hydraulically slidable piston slides relative to the housing and exerts on the turret head in its interlocked or clamped state a force applied in the same direction as the reactive force.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: December 21, 1993
    Assignee: Sauter Feinmechanik GmbH
    Inventor: Gunther Schips
  • Patent number: 5261147
    Abstract: An indexing system for the rotary work changer of a machining center for supporting and interchanging work-holder pallets between the machining zone and the load/unload zone of the machining center.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: November 16, 1993
    Assignee: Cincinnati Milacron Inc.
    Inventor: David B. Wood, III
  • Patent number: 5187847
    Abstract: A tool turret includes two toothed rims concentric to the rotary axis of its turret head and arranged radially adjacent to one another. One rim is immovable relative to the turret head. The other rim is immovable relative to the turret housing. The teeth of the toothed rims point toward a position-locking member arranged in an axial direction adjacent and coaxial to both of the toothed rims. The toothed rims can be held by a piston which is axially slidable to a position-locking setting, in which its teeth engage the teeth of the two toothed rims without any play. The piston is part of a pneumatic assembly. The angle formed by the sides of each tooth of the toothed rims and the position-locking member is reduced from the conventional value of 60.degree.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: February 23, 1993
    Assignee: Sauter Feinmechanik GmbH
    Inventors: Helmut Thumm, Friedrich Handel
  • Patent number: 5185936
    Abstract: A probe head (10) includes a support (12) by which the probe head is retained on the quill of a coordinate positioning machine, and a rotor (14) which is magnetically retained on the support (12). The rotor (14) is rotatable between a plurality of indexed angular positions provided by a ring or balls (26) and three adjacently positioned pairs of rollers (24). A drive dog shaft (20) is linearly movable to disengage the balls (26) from the rollers (24), and rotatable to rotate the rotor (14) to a new indexed position, whereupon the drive dog shaft (20) is retracted to re-engage a set of three balls (26) with the rollers (24). Exchange of a measuring probe (16) is performed by removing the entire rotor (14), and exchanging it for a further rotor carrying a different measuring probe. The engagement elements provided by rollers (24) and balls (26) thus serve the functions of (a) indexing and (b) repeatably retaining a rotor (14) on the support (12).
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: February 16, 1993
    Assignee: Renishaw Metrology Limited
    Inventor: David R. McMurtry
  • Patent number: 5146663
    Abstract: A revolving head for machine tool including one fixed frame, one spindle-bearer turret movable in rotation with respect to this frame, at least two tool bearer spindles fitted to the turret, rotation devices for the spindles and automatic driving devices to rotate the turret. The turret includes a first element secured to the frame and a second element movable with respect to the first element. The automatic driving devices includes an axial piston and a rotary piston to move respectively axially and in rotation the second element of the turret with respect to the first element.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: September 15, 1992
    Assignee: Somex Mulhouse S.A.
    Inventor: Pierre Buessinger
  • Patent number: 5133538
    Abstract: A table for securing a pallet supporting a workpiece to a machine tool, the table having a spindle movable in a vertical direction. When the spindle ascends, the clamp arms move outward thereby to enable the clamp pawl to clamp the pallet at a clamping position, and when the spindle descends, the clamp arms are withdrawn to release the pallet from clamp.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: July 28, 1992
    Assignee: Kabushiki Kaisha Mori Seiki Seisakusho
    Inventors: Norihide Maeda, Hideki Okahashi
  • Patent number: 4989303
    Abstract: A tool turret has a locking mechanism part axially slidable relative to the turret head with a face gear engaging face gears of the turret head and the housing in its locked position. The axial slidability of the locking mechanism part out of its locked position and the curtailibility of an opposing compression spring allows disengagement of the face gear of the locking mechanism part from at least one of the other two face gears. The force of the compression spring during the load on the turret head arising in disturbance-free operation is greater than the force working through this load on the locking mechanism part in the direction of disengagement of its face gear. In case of a collision with a stress exceeding the load capacity of the tool turret, the force of the compression spring is smaller than the collision force working through this load on the locking mechanism part in the direction of a disengagement of its face gear.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: February 5, 1991
    Assignee: Sauter Feinmechanik GmbH
    Inventors: Willy Sauter, Helmut Thumm, Gunther Schips, Alfred E. Muller
  • Patent number: 4852428
    Abstract: An indexing device wherein a rotary member which is supported by a support member such that the rotary member is rotatable about its axis and axially movable between a first position thereof and a second position thereof is rotated by a rotational drive mechanism having a one-way clutch, in increments of a predetermined angle, and wherein the rotary member is prevented by a stopper mechanism from being rotated past the predetermined angle due to inertia while being placed in the first position, and is precisely positioned by a positioning mechanism while being placed in the second position.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: August 1, 1989
    Assignee: Fujii Seiko Limited
    Inventors: Katutoshi Haga, Hisatoshi Yoshida, Yushi Mitani
  • Patent number: 4785513
    Abstract: A compound turret for machine tools such as latches or the like having rotating and non-rotating tooling turrets mounted on a single housing. The compound turret includes a primary drive and a secondary drive. The primary drive includes a compound turret indexing unit operable to index the rotating and non-rotating tooling turrets into the turret operating and turret storage positions. The compound turret indexing unit consists of a harmonic drive that enables the operator to incrementally vary the turret operating position. The harmonic drive achieves high reduction ratios in a single stage thus eliminating the cumbersome gear systems usually implemented to achieve the reduction ratios required. The primary drive further includes a non-rotating tool indexing unit. The non-rotating tool indexing unit is operable to index the non-rotating tooling. The non-rotating tool indexing unit consists of a harmonic drive unit similar to the compound turret indexing unit.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: November 22, 1988
    Assignee: Hardinge Brothers
    Inventors: Richard C. Lee, Ivan R. Brown, Kamalakar K. Rao, Joseph P. Waldron
  • Patent number: 4706351
    Abstract: A twin disc type tool turret mechanism for CNC machines including a double layer of tool mounting discs attached respectively to two of a three-piece toothed ring-type registration and lock coupling. The front disc provides a number of mounting slots for external turning tools and the rear disc provides the same number of mounting seats for facing, OD turning or internal boring tools. A drive mechanism combined with a hydraulic control system incorporated in/on the turret housing facilitates unlocking, rotation, and relocking of the discs with the turret housing. The subject turret can also include provisions for attachment of revolving tools with an active spindle and an additional spindle motor for effecting the required processing operations. In addition, both OD and ID probes and a signal transmitting mechanism may be installed in both discs to accomplish in-process measurement of the workpiece.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: November 17, 1987
    Inventor: Kuo-Huey Chuang
  • Patent number: 4685251
    Abstract: A surface grinding machine wherein the turret for two grinding tools is indexible with reference to a support by disengaging the surfaces of its two coaxial sections from opposite sides of an annular component of the support. This is effected by cylinder and piston units which move one of the sections axially of any away from the other section before moving the other section away from the annular component. The one section carries one portion of a first bearing which engages the other portion of such bearing on the support when the one section is disengaged from the annular component. The other section carries one portion of a second bearing which engages another portion of the second bearing on the support in response to disengagement of the other section from the annular component. The turret is then indexible to a different position before the cylinder and piston units effect of allow a return movement of the two sections of the turret into frictional engagement with the annular component.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: August 11, 1987
    Assignee: Schaudt Maschinenbau GmbH
    Inventors: Rudolf Beyer, Lutz-Peter Heerdt, Roland Schemel
  • Patent number: 4644825
    Abstract: An indexing and positioning device comprises: a fixed inner ring; and outer ring disposed coaxially, coplanarly, and revolvably therearound with an annular boundary therebetween; a plurality of positioning recesses formed at equal indexing intervals along and straddling the boundary and comprising respective inner and outer parts respectively formed in the inner and outer rings, all recesses assuming a completely assembled state upon combination of the inner and respective outer parts in a specific indexing register; a plurality of positioning balls one of which is floatably accommodated within each of the positioning recesses; a retainer confining and guiding each of the positioning balls; and a clamp ring operable to press the positioning balls inward into the respective positioning recesses thereby to cause accurate and positive centering and positioning of indexing positions of the inner and outer rings relative to each other.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: February 24, 1987
    Assignee: Kabushiki Kaisha Yamazaki
    Inventor: Yoshio Yamazaki
  • Patent number: 4640159
    Abstract: A tool holder having a head with four pockets, each for supporting an indexible insert. Each insert is mounted on the head such that it can be indexed to reposition a plurality of cutting edges on the insert. The head has a shank rotatably mounted in a body supported on a machine, such as a lathe. A handle connected to the shank is used to replace an insert in a cutting position with another insert merely by rotating the head and without repositioning the body.
    Type: Grant
    Filed: November 22, 1985
    Date of Patent: February 3, 1987
    Inventor: Stojan Stojanovski
  • Patent number: 4587871
    Abstract: NC turret lathe comprising a tool turret rotatable about an indexing axis and mounted for rotation in a turret slide displaceable in a direction parallel to the indexing axis, also comprising a turret indexing drive monitored by a control mechanism for rotating the tool turret, and a slide drive monitored by a control mechanism for displacing the turret slide. In order to decrease the expenditure required to index the tool turret, the slide drive also constitutes the turret indexing drive, and the slide drive control also serves to monitor the turrent indexing drive. An actuatable coupling is provided between the slide drive and the turret to prevent undesired rotation of the turret when it is only to be slidably displaced.
    Type: Grant
    Filed: August 2, 1983
    Date of Patent: May 13, 1986
    Assignee: Index-Werke KG Hahn & Tessky
    Inventor: Heinrich Lahm
  • Patent number: 4571847
    Abstract: In a co-ordinate measuring machine a probe is connected to the head of the machine by a pivotal arm, and the orientation of the probe is changed by moving the head so that the arm engages a fixed structure and a moment is applied to the arm which is thereby caused to turn and present the probe in the required orientation.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: February 25, 1986
    Assignees: Rolls-Royce Ltd., Renishaw plc
    Inventor: David R. McMurtry
  • Patent number: 4563910
    Abstract: A rotatable member to be indexed in a machine is intermittently rotated through specific angular displacements between predesignated indexing positions by an indexing mechanism driven by a hydraulic motor and is positively locked in each indexing position by a positive clutch coupling comprising a movable plate fixed to the rotatable member and a mating stationary plate fixed to a stationary part of the machine, the clutch coupling being engaged and disengaged by a hydraulic cylinder. The hydraulic motor and hydraulic cylinder are controllably and coordinately operated by a common hydraulic system including pipe and tank lines and at least one electromagnetic changeover valve of the two-position, four-connection type.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: January 14, 1986
    Assignee: Kabushiki Kaisha Miyano Tekkosho
    Inventors: Hiroo Miyazaki, Teruo Shirai, Tsutomu Ogawa
  • Patent number: 4558611
    Abstract: An angular divider device is described for worktables, toolholder turrets or the like, in which the number of positions of the subdivision is not predetermined and can be of any desired value, even of very small order such as 1.degree. or even less, without the necessity of positions constrained by mechanical arresting devices such as slots and associated latches, the exactness of the position achieved being determined by the coupling of basic fixed and movable crown gear wheels.
    Type: Grant
    Filed: July 9, 1982
    Date of Patent: December 17, 1985
    Assignee: Baruffaldi Frizioni S.p.A.
    Inventor: Pier C. Boffelli
  • Patent number: 4524655
    Abstract: An indexable machine tool turret comprising a body having a chamber, an opened end, a closed end and a central longitudinal axis; an axially displaceable rotatable turret top plate having a number of angularly spaced apertures for holding tools, said top plate being co-axial with said body axis; an axially displaceable and extending rotatable shaft connected to said top plate, said shaft co-axial with said top plate; two opposed annular face gears for seating said top plate to said body, said gears co-axial with and concentric with said top plate, one of said gears mounted in said top plate for engaging said other gear, said other gear mounted in said body; said shaft including a ring gear mounted concentrically thereto; means for displacing said shaft and thereby said top plate for causing said face gears to engage and disengage; drive means for engaging said ring gear for rotating said shaft when said face gears are disengaged; cushioned stopping means for stopping said shaft rotation; and, angular rotation
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: June 25, 1985
    Assignee: Hardinge Brothers, Inc.
    Inventors: Joseph P. Waldron, Ivan R. Brown
  • Patent number: 4510668
    Abstract: A machining center of a horizontal type including a vertical base is disclosed. A pallet carrying a workpiece to be machined is mounted on a pallet slide with a pallet surface being vertical so that the pallet is movable along a first horizontal axis and rotatable about this first axis. The pallet slide is mounted on the vertical base so as to be movable vertically along a first vertical surface of this base, this surface being parallel to the first axis. A spindle supporting a tool for machining the workpiece is mounted in a spindle slide so that the spindle is rotatable about a second horizontal axis making a right angle with the first axis. The spindle slide is supported by the vertical base so as to be movable horizontally along a second vertical surface of the base, said second surface making a right angle with the first vertical surface of the base. Accordingly, a wide space is formed below the workpiece and tool supported by the pallet slide and spindle slide respectively.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: April 16, 1985
    Assignee: Tsugami Corporation
    Inventors: Kenichi Ishida, Tetsuro Takahashi
  • Patent number: 4507993
    Abstract: A machine tool (10) utilizing two speed hydraulic indexing with direction control valves (86,88) which are energized to stop. A turret (12) is rotated during indexing by a hydraulic motor (36). An open loop control system is utilized to locate the turret (12) position before clamping. A plurality of cams (40,42,44,46,48,50) which trigger associated proximity switches (41,43,45,47,49,51) are used to provide control information to the electric control circuit (17) for turret indexing. A final position cam (50) which rotates at a multiple of the turret (12) indexing speed is provided for final positioning of the turret (12) at a desired work station. The final position cam (50) is adjustable so that the tool turret (12) will be accurately stopped at a selected work station. The final position cam (50) also provides information which is utilized for switching from a high speed indexing mode to a low speed indexing mode when the selected work station is approached.
    Type: Grant
    Filed: March 24, 1983
    Date of Patent: April 2, 1985
    Assignee: The Warner & Swasey Company
    Inventors: Martin L. Silverman, Donald P. Shook
  • Patent number: 4491044
    Abstract: A facial relief and seal creates a closed damping chamber between the spindle end face and adjacent tool support plate. A plurality of tools are located on the face plate near the outer periphery. In one embodiment, a viscous medium, such as oil, is provided in the damping chamber. In an alternate embodiment, a visco-elastic material, such as PVC, is provided in the damping chamber. Relative movement between the spindle end face and the tool support plate will cause vibration damping.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: January 1, 1985
    Assignee: Cincinnati Milacron Inc.
    Inventors: Robert G. Haas, John R. Hasz, David B. Wood, III
  • Patent number: 4453435
    Abstract: A tool support for turning annular grooves of inwardly increasing cross-section in workpieces, has a carrier, a tool clamping rod rotatably and axially shiftable in the carrier, and machining tools carried by the rod and having an effective length which is shorter than the cross-sectional opening of the groove at the workpiece surface.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: June 12, 1984
    Assignee: Hoesch Maschinenfabrik Deutschland AG
    Inventors: Walter Sauerwald, Bernd Weck, Klaus Schmidts
  • Patent number: 4422352
    Abstract: A rotatable turret for bringing any selected one of a plurality of tool holders into operative position relative to a workpiece, is characterized in that the turret can be rotated in either direction so that it need follow only the shortest path between the location of the old tool holder and the location of the new tool holder when changing from tool to tool. For this purpose, the turret has a rotatable hub with a plurality of blocks on its periphery slidable relative thereto in directions parallel to the axis of rotation, into and out of slots on a fixed member, the location of the slots corresponding to the operative locations of the tool holders. The blocks are all secured to the keeper ring of an annular electromagnet, whose strength is sufficient to retain the keeper ring attracted when the blocks are out of the slots, but whose strength is insufficient to retain the keeper ring when the blocks are in the slots.
    Type: Grant
    Filed: October 20, 1981
    Date of Patent: December 27, 1983
    Assignee: Baruffaldi Frizioni S.p.A.
    Inventor: Pier C. Boffelli
  • Patent number: 4380939
    Abstract: A rotary indexing table for use with a milling machine which has a reduced height and includes a base plate, a top plate, bearing means for mounting the top plate for rotation, means for clamping the top plate to prevent its rotation, a rotary union for transmitting hydraulic pressure to the top of the top plate to accommodate fixtures mounted on the top plate, an air chamber under the top plate so that the top plate rotates freely when air pressure is held in the chamber and indexing means to locate preselected positions of the top plate.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: April 26, 1983
    Assignee: Cameron Iron Works, Inc.
    Inventor: Richard E. Gardner
  • Patent number: 4355548
    Abstract: A tool turret according to the invention comprises a turret head which is shiftable between a rotational position and a working position, drive means adapted to rotate the turret head in the rotational position and being in permanent engagement with the turret head, fixation means for locking the turret head in the working position, and a transducer sensing the position of the turret head.The turret head is rotatable with respect to a non-rotary body which is axially displaceable with the turret head and which has a circumferential projection serving as a piston and being mounted axially displaceable in an annular recess serving as a cylinder and formed in a seat, receiving the body, of a member supporting the body. The projection and the annular recess cooperate with each other to ensure axial displacement of the body with the turret head between the rotational position and the working position.
    Type: Grant
    Filed: August 19, 1980
    Date of Patent: October 26, 1982
    Assignee: SMT Machine Company AB
    Inventors: Rolf Svensson, Ingemar Svensson
  • Patent number: 4353271
    Abstract: A precision rotary indexing fixture is disclosed of the type including a top plate adapted to have work pieces mounted thereon with the work plate indexed to any of a plurality of precision rotary positions. The precision locking of the top plate is achieved by serrated coupling rings, one mounted on the outer periphery of the top plate, the other mating ring mounted on a base structure. The top plate is locked in various index positions by the application of disc spring sets acting on the top plate through an annular piston and a set of bearing elements mounted in opposed grooves in the piston and a race ring mounted to the top plate. The fluid forces acting on the piston acts to release the locking pressure exerted by the disc spring sets and release the coupling serration engagement during indexing of the top plate.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: October 12, 1982
    Assignee: A.G. Davis Gage and Engineering Co.
    Inventor: Daniel J. Pieczulewski
  • Patent number: RE35510
    Abstract: A probe head (10) includes a support (12) by which the probe head is retained on the quill of a coordinate positioning machine, and a rotor (14) which is magnetically retained on the support (12). The rotor (14) is rotatable between a plurality of indexed angular positions provided by a ring or balls (26) and three adjacently positioned pairs of rollers (24). A drive dog shaft (20) is linearly movable to disengage the balls (26) from the rollers (24), and rotatable to rotate the rotor (14) to a new indexed position, whereupon the drive dog shaft (20) is retracted to re-engage a set of three balls (26) with the rollers (24). Exchange of a measuring probe (16) is performed by removing the entire rotor (14), and exchanging it for a further rotor carrying a different measuring probe. The engagement elements provided by rollers (24) and balls (26) thus serve the functions of (a) indexing and (b) repeatably .[.retaining.]. .Iadd.positioning .Iaddend.a rotor (14) on the support (12).
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: May 20, 1997
    Assignee: Renishaw Metrology Limited
    Inventor: David R. McMurtry