| TSUDAKOMA KOGYO KABUSHIKI KAISHA Patent applications |
| Patent application number | Title | Published |
|---|
| 20120024644 | MAIN SHAFT DRIVE FOR MACHINE TOOL - A main shaft drive includes a supply groove that opens to a friction surface, that extends so as to surround a main shaft within a contact range where the friction surface and a pressing surface oppose each other, and that includes an intersecting groove and a discharge opening. The intersecting groove extends in a direction of intersection with a circumference in which a rotational center of the main shaft is a center. The discharge opening is connected to a location that is outside the contact range. By opening a nozzle hole, used for supplying lubricant, towards the supply groove, as the main shaft rotates, four intersecting grooves move relative to the contact range, so that the lubricant is supplied to the four moved intersecting grooves. Therefore, the lubricant easily reaches a location within the contact range where the friction surface and the pressing surface oppose each other. | 02-02-2012 |
| 20120011964 | INDEXING APPARATUS FOR MACHINE TOOL - A slide disk that is displaceable when the slide disk is bent toward a base section of a frame is provided at a main shaft, and a friction surface that can contact a pressing portion of the slide disk is provided at the base section. The pressing portion of the slide disk normally presses the friction surface to cause the pressing portion of the slide disk to normally press the friction surface, and hence a pressing force for applying to the main shaft a rotational resistance that permits rotation of the main shaft normally acts on the main shaft. Accordingly, even if the position of the center of gravity of a member to be rotated is deviated from a rotation axis of the main shaft, the rotational resistance can be applied to the main shaft. | 01-19-2012 |
| 20110023655 | ROTATION-RESISTANCE DEVICE FOR MAIN SHAFT DRIVE OF MACHINE TOOL - When a finishing operation is performed while rotating a workpiece at a main shaft drive of a machine tool, pulsation occurring in a rotation of the main shaft drive is restricted and the rigidity of a main shaft is increased without increasing the size of a bearing. A rotation-resistance device of a main shaft drive in a machine tool has the following structure in the main shaft drive including a main shaft | 02-03-2011 |
| 20110023654 | INDEX TABLE - In an unbalance torque compensating device, control of urging force for compensation is not particularly required, and a space for rotating a balance weight is not required. An index table in which a rotating shaft | 02-03-2011 |
| 20110000331 | BALL-TYPE SPEED REDUCER AND ROTARY TABLE DEVICE USING THE SAME - Provided are a ball-type speed reducer and a rotary table device that are capable of performing high-speed rotation and high-rigidity rotation and suitable for reduction in size and weight. An index table | 01-06-2011 |
| 20100329807 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a rotating shaft to which a rotationally driven member is secured; a housing, surrounding the outer periphery of the rotating shaft and mounted to and removed from the body of the machine tool; bearings disposed between the housing and the rotating shaft, and driving means disposed between the housing and the rotating shaft and rotating the rotating shaft to index an angular position. The driving means includes drive motors, each including a motor rotor and a motor stator concentrically disposed around the rotating shaft in the housing. The housing has wiring holes in a thick-walled internal portion of an outer cylinder surrounding the outer periphery of the rotating shaft. The wiring holes are provided along an axial direction of the rotating shaft. The wiring holes receive at least upstream portions in entire lengths in a drawing-out direction of cables connected to the driving motors. | 12-30-2010 |
| 20100322734 | SPINDLE HEAD FOR MACHINE TOOL - A support shaft of a spindle unit having a through hole in which wires are laid has a structure that can obtain much spatial room so as to prevent a break in cables and to be compatible with a high-output spindle motor. | 12-23-2010 |
| 20100319487 | CLAMP DEVICE FOR ROTATION INDEXING APPARATUS FOR MACHINE TOOL - Intended is to unitize a clamp device for a rotation indexing apparatus for a machine tool, thereby facilitating the maintenance of the clamp device and the assembly of the indexing apparatus including the clamp device. The rotation indexing apparatus ( | 12-23-2010 |
| 20100313708 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a housing, a rotating shaft, and a drive motor, the housing having a through hole, the rotating shaft ( | 12-16-2010 |
| 20100310335 | WORKING HEAD FOR MACHINE TOOL - A machining head for a machine tool includes a spindle unit having a spindle to which a tool is attachable and a support head component. The support head component includes an index mechanism that rotates the spindle unit in order to index an angular position of the spindle unit. The support head component further includes first and second support segments containing respective support shafts disposed opposite to each other across the spindle unit such that shaft centers of the support shafts are aligned with the axis line. Each of the first and second support segments has a housing having a bearing member fixed thereto, the bearing member rotatably supporting the corresponding support shaft through a bearing. The support shaft in each support segment is supported by the corresponding bearing member in a manner such that the support shaft becomes movable together with the bearing member in an axial direction of the support shaft by releasing a fixed state between the support shaft and spindle unit and the fixed state between the bearing member and corresponding housing. | 12-09-2010 |
| 20100294173 | TILTING TABLE DEVICE - A tilting table device includes a first rotary member which is rotated by a rotation amount equivalent to that of a tilt shaft when rotation of the tilt shaft is transmitted; a second rotary member which has an axis parallel to that of the first rotary member and is rotated by a rotation amount equivalent to or substantially equivalent to that of the first rotary member in a direction opposite to that of the first rotary member when the rotation of the first rotary member is transmitted; two retaining members respectively provided at the first and second rotary members, in which when the center of gravity of a table is located at an uppermost position or a lowermost position, the retaining members are located on or near a line connecting rotation centers of the first and second rotary members, the retaining members are located at equivalent or substantially equivalent distances respectively from the rotation centers, both the retaining members are provided inside or outside the two rotation centers; and an urging device which causes a constant urging force to be applied between the two retaining members so as to reduce a torque applied to the tilt shaft by movement of the center of gravity from the uppermost position or the lowermost position as a result of the rotation of the tilt shaft. | 11-25-2010 |
| 20100289204 | FORCE INCREASING DEVICE FOR CLAMPING DEVICE OF INDEX TABLE - In a force increasing device of a clamping device for an indexing table, a large clamping force is obtained without reducing working efficiency of a workpiece and while limiting the length in the axial direction of a rotating shaft. | 11-18-2010 |
| 20100275726 | ROTARY INDEXING TABLE DEVICE FOR MACHINE TOOL - In a rotary indexing table device | 11-04-2010 |
| 20100269949 | CARRIER RAPIER - In a carrier rapier including a rapier head having a hook-shaped tip, a weft holding portion and a weft guiding portion are formed. The weft holding portion has a wedge-shaped gap formed by an opposing surface of a catch lever and a base surface at a turn-back portion of the carrier rapier. The weft guiding portion guides a weft from the exterior of the carrier rapier to the weft holding portion. In addition, a weft interfering portion is provided between the weft guiding portion and the weft holding portion. An angle θ | 10-28-2010 |
| 20100258397 | ROTATIONAL RESISTANCE APPLYING DEVICE IN MAIN SHAFT DRIVING DEVICE FOR MACHINE TOOL - A rotational resistance applying device in which a hollow roller is provided between a first surface of a clamp piston (pressing member) and a second surface of a sliding disc (a press member), and in which a pressing force applied to the clamp piston acts upon the sliding disc through the hollow roller that press-contacts the first and second surfaces by displacement of the clamp piston. By this, rolling resistance of the hollow roller resiliently deformed by the pressing force causes a rotational resistance to be applied to a main shaft within a range allowing rotation. This makes it possible to prevent pulsation from being generated in the rotation of the main shaft. In addition, even if the pressing force is applied to the clamp piston, the hollow roller rolls, so that wear of the clamp piston and wear of the sliding disc can be restricted. | 10-14-2010 |
| 20100207496 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a rotating shaft, to which a rotationally driven member is secured; a housing, which surrounds the outer periphery of the rotating shaft and which is mounted to and removed from the body of the machine tool; bearings disposed between the housing and the rotating shaft; and driving means, disposed between the housing and the rotating shaft, and rotating the rotating shaft to index an angular position. The driving means includes drive motors, each having a motor rotor and a motor stator concentrically disposed around the rotating shaft in the housing. The drive motors are disposed in series and separated from each other in an axial direction of the rotating shaft. At least one of the housing and the rotating shaft is such that portions thereof are connected to each other so as to be capable of being divided from each other in the axial direction of the rotating shaft. The housing and the rotating shaft are made to correspond to the plurality of drive motors respectively, to connect portions thereof so as to be capable of being divided from each other. | 08-19-2010 |
| 20100206599 | MACHINE-TOOL SPINDLE HEAD - A machine-tool spindle head makes it possible to prevent the size of the entire device from increasing and can easily control drive motors compared to a related device. A machine-tool spindle | 08-19-2010 |
| 20100206423 | INSERT RAPIER - An insert rapier includes a weft-holding portion at a bottom portion of a rapier head. Rear and front walls are provided at a distal side of the rapier head with respect to the weft-holding portion and protruding from both sides of the bottom portion, thereby having a warp-dividing function. The insert rapier can guide a weft, which intersects with warps at a predetermined angle, to the weft-holding portion. The rapier head includes a tongue piece provided at the distal side with respect to the weft-holding portion, in a region between the weft-holding portion and the rear wall. The tongue piece has a distal tip located lower than the rear wall, and has an upper ridge gradually ascending from the distal tip toward a proximal side. The tongue piece is movable to a position above the rapier head or toward the proximal side. | 08-19-2010 |
| 20100199804 | ROTARY INDEX DEVICE IN MACHINE TOOL - A rotary index device in a machine tool includes a rotating shaft; and a clamp device. The clamp device includes a piston member provided displaceably in a direction along a rotational axis of the rotating shaft and having a tapered surface formed on a side surface thereof on a clamp position side, pressing force conversion means, for receiving a pressing force from the piston member when the piston member is displaced, converting the pressing force into a force in the radial direction of the rotating shaft, and causing the converted force to act on the rotational body, and urging means for urging the piston member in a direction in which the pressing force conversion means generates the pressing force in the radial direction of the rotating shaft. | 08-12-2010 |
| 20100189525 | MACHINING HEAD FOR MACHINE TOOL - A machining head has a support head component, which includes first and second support segments and a base segment supporting both the first and second support segments, the support segments being disposed opposite to each other across the spindle unit to hold the spindle unit therebetween such that a center of axle thereof is aligned with a rotary axis line thereof, the first and second support segments respectively including support shafts whose opposing end surfaces have the spindle unit secured thereto. The support segments respectively include housings as main bodies that are independent of the base segment. The housings accommodate the support shafts. Each housing is attached to the base segment by means of a plurality of first screw members that are screwed to the base segment and are manipulatable from the outside. The spindle unit is attached to the support shafts by means of a plurality of second screw members that are screwed to the support shafts and are manipulatable from the outside. | 07-29-2010 |
| 20100183394 | INDEXING DEVICE - An indexing device ( | 07-22-2010 |
| 20100178125 | INDEX DEVICE FOR MACHINE TOOL - An index device for a machine tool includes a rotary shaft ( | 07-15-2010 |
| 20100176545 | BREAKAGE PREVENTING DEVICE FOR TILTING TABLE INDEXING DEVICE - In a tilting table indexing device driven by a direct-drive motor, a tilting table is prevented from rotating beyond an allowable rotation range when power is shut off in an emergency, such as power outage, and thus a breakage accident of, for example, a tool or a workpiece is reliably prevented from occurring. In a tilting table indexing device ( | 07-15-2010 |
| 20100175505 | CLAMPING DEVICE FOR ROTARY INDEX DEVICE FOR MACHINE TOOL - A clamping device for a rotary index device for a machine tool, in particular, a normal clamp type clamping device makes it possible to simplify the structure thereof and to maintain a stabilized positioning performance. In a rotary index device ( | 07-15-2010 |
| 20100170372 | SPINDLE HEAD FOR MACHINE TOOL - In a spindle head for a machine tool in which a spindle ( | 07-08-2010 |
| 20100126308 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a rotating shaft, to which a rotationally driven member is secured; a removable housing surrounding the outer periphery of the rotating shaft; bearings disposed between the housing and the rotating shaft and separated from each other in the axial direction of the rotating shaft; and driving means, provided between the housing and the rotating shaft, rotating the rotating shaft to index an angular position. The driving means uses drive motors, each including a motor rotor and a motor stator disposed concentrically around the rotating shaft, and separated from each other in the axial direction of the rotating shaft. A multiple-row roller bearing capable of supporting an axial load and a radial load is used for the bearing closest to the side of the rotationally driven member. | 05-27-2010 |
| 20100123278 | CLAMPING DEVICE IN MAIN SHAFT DRIVING DEVICE FOR MACHINE TOOL - A clamping device in a main shaft driving device for a machine tool, in which the main shaft driving device rotationally driving a main shaft by a driving device, the clamping device includes: a braking member provided at a side of the frame and including a pressure-receiving surface and a braking portion; a pressure chamber formed by the pressure-receiving surface and the frame; and an operating fluid supplying mechanism provided for supplying the operating fluid from an operating fluid supply source to the pressure chamber. The press-contact force is caused to act upon the main shaft. The operating fluid supplying mechanism includes a switching portion that selectively supplies the operating fluid. The braking member is formed so that the braking portion causes the press-contact forces that differ from each other. | 05-20-2010 |
| 20100107813 | CLAMP SLEEVE - A clamp sleeve for an indexing device is provided, the clamp sleeve being capable of providing a desirable clamping force without greatly increasing a fluid pressure, and having a long life. A clamp sleeve | 05-06-2010 |
| 20100089201 | INDEX TABLE - In an index table, a left-hand specification and a right-hand specification of a motor can be changed. As solving means, there is provided an index table | 04-15-2010 |
| 20100084828 | INDEXING DEVICE FOR MACHINE TOOL - A cylindrical pressure-receiving member | 04-08-2010 |
| 20100019427 | CLAMPING DEVICE OF INDEXING DEVICE FOR MACHINE TOOL - A clamping device for holding an indexed angular position of a main shaft includes a clamp section non-rotatable relative to the main shaft, and a pressing mechanism including a clamp piston displaceable in an axial direction of the main shaft and causing a fluid pressure received by the clamp piston to act on the clamp section. The clamp section includes a first clamp portion being non-rotatable relative to the main shaft, and a second clamp portion being rotatable with the main shaft. The pressing mechanism includes first and second pressing portions which respectively press the first and second clamp portions. The second clamp portion or the second pressing portion is elastically displaced when the clamp piston advances by the fluid pressure. Forces in axial and radial directions are respectively applied to the first and second clamp portions, thereby clamping the main shaft. | 01-28-2010 |
| 20080302208 | COOLING DEVICE FOR TABLE PLATE OF ROTARY INDEXING APPARATUS - A table plate has a coolant channel including at least a pipe that is in contact with at least one of a back surface and an outer peripheral surface of the table plate or a path disposed in the table plate. At least a portion of the coolant channel is in areas outside a reference hole, which is formed in the table plate coaxially with the rotating shaft, the areas corresponding to two or more of four quadrants, which are defined by two perpendicular lines intersecting at an axial center of the rotating shaft in a plan view. The coolant channel has inlet and outlet ends that open in the outer peripheral surface of the table plate or an outer peripheral surface of the rotating shaft. The inlet and outlet ends are respectively connected to a coolant-supplying path and a coolant-collecting path through a rotary joint. | 12-11-2008 |
