JP2010264528A - Movable body driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable body driving device for performing tandem driving of two driving systems provided on both sides of a movable body with one servo motor through a timing belt. <P>SOLUTION: The movable body driving device includes the movable body 13 (67) having the two of the first and second driving systems 20A, 20B on both sides, a rotational connection device 48 connecting the two driving systems to rotate through a member such as a timing belt having small rigidity, and one servo motor (30, 80, 90) performing tandem driving of the two driving systems through the rotational connection device. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a movable body drive device that tandem-drives two drive systems provided on both sides of a movable body by a single servo motor.

  For example, in a tilting device used in a 5-axis machining center, it is necessary to increase the motor driving capability and drive the center of gravity in order to increase the size of the tilt table, increase the speed, and increase the accuracy. Drive systems are arranged on both sides, and these drive systems are driven synchronously by two servo motors so that the tilt table is driven in tandem. As this type of tilt device, for example, there is a technique described in Patent Document 1.

  The tilt device described in Patent Document 1 is provided with a pair of pivot shafts protruding outward on both sides of a tilt table, and the pivot shafts are pivoted via a bearing on a pair of support portions erected on the bed. I support it as possible. Servo motors are arranged on both sides of the tilt table, respectively, and a pair of turning shafts are connected to the servo motors via a drive system including a reduction gear mechanism, and the servo motor is driven in tandem to tilt the tilt table. It is like that.

Japanese Patent Laid-Open No. 2001-9653

  When the drive systems provided on both sides of the tilt table are driven in tandem by two servo motors, there are two types of control, position tandem control and torque tandem control. In position tandem control, the rigidity of the tilt table is large, so there is a problem of crushing due to the synchronization error of the two servo motors. In torque tandem control, gain and acceleration are sufficient to ensure positioning accuracy. There are problems such as being unable to raise.

  Moreover, in the case where the drive system provided on both sides of the tilt table is driven in tandem by two servo motors, two servo motors are required, so that the total cost including the amplifier device and the control device increases, There are problems such as requiring complicated control for synchronous control of the servo motor.

  Such a problem occurs not only in a tilt device that drives the tilt table in tandem, but also in a case where a movable body such as a linear motion table or a spindle head moves linearly by tandem drive.

  The present invention has been made to solve the above-described conventional problems, and a movable body in which two drive systems provided on both sides of the movable body are tandem driven by a single servo motor via a timing belt or the like. The object is to provide a drive device.

  The invention according to claim 1 is characterized in that a movable body having a pair of drive systems on both sides, a rotary coupling device that rotationally couples between the pair of drive systems via a member having small rigidity, and the rotary coupling device The pair of drive systems is configured by one servo motor that drives in tandem.

  According to a second aspect of the present invention, in the first aspect, the servo motor is directly coupled to one of the pair of drive systems, and the rotation of one of the pair of drive systems is transmitted to the pair of drive systems via the rotary coupling device. This is transmitted to the other drive system.

  A feature of the invention according to claim 3 is that, in claim 1 or claim 2, the member of the rotary coupling device is constituted by a timing belt.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the movable body includes a tilt table, and both end portions of the tilt table have a predetermined interval on the support base. Then, the first and second support portions arranged to face each other are rotatably supported around a common axis via a bearing, and the first support portion of the support base has the pair of driving units The servo motor that drives one of the systems and one of the drive systems is disposed, and the other of the pair of drive systems is disposed on the second support portion of the support base.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the pair of drive systems are supported in a first and second manner so as to be rotatable around the common axis. Rotating wheel or worm wheel, first and second cam shafts or worm shafts meshing with the first and second rotating wheels or worm wheels, and rotating to the first and second cam shafts or worm shafts The first and second gear trains are connected, and the rotary connecting device is arranged to rotationally connect the first and second gear trains.

  According to a sixth aspect of the present invention, in any one of the first to third aspects, the movable body includes a slide table, and both end portions of the slide table have a predetermined interval on the support base. The first guide rail and the second guide rail are slidably supported. On the first guide rail side, one of the pair of drive systems and the servo motor that drives one of the drive systems are provided. The other of the pair of drive systems is disposed on the second guide rail side.

  According to a seventh aspect of the present invention, in the sixth aspect, the pair of drive systems includes a pair of ball screw shafts supported rotatably about an axis parallel to the first and second guide rails, A pair of ball nuts that are respectively screwed onto the ball screw shafts and fixed to both ends of the slide table, and the rotary coupling device is arranged to rotationally connect between the pair of ball screw shafts. It has been done.

  According to the first aspect of the present invention, a movable body having a pair of drive systems on both sides, a rotary coupling device that rotationally couples between the pair of drive systems via a member having small rigidity, and a rotational coupling device. Since the pair of drive systems are configured with one servo motor for tandem driving, the pair of drive systems of the movable body can be tandem driven by one servo motor, and the pair of drive systems are rotationally coupled. By reducing the rigidity of the rotating connecting device, it is possible to suppress the occurrence of creaking due to a synchronization error during tandem driving.

  According to the invention of claim 2, the servo motor is directly connected to one of the pair of drive systems, and transmits one rotation of the pair of drive systems to the other of the pair of drive systems via the rotary coupling device. Therefore, as in the case where two conventional servomotors are used, one of the pair of drive systems can be directly driven by the servomotor, and the tandem drive of the movable body can be performed with high accuracy.

  According to the third aspect of the present invention, since the member of the rotary coupling device is configured by the timing belt, the rigidity between both sides of the movable body can be weakened with a simple configuration.

  According to the fourth aspect of the present invention, the movable body includes a tilt table, and both end portions of the tilt table are arranged to face the support base with a predetermined interval, and the first and second support portions. The first support portion of the support base is provided with a servo motor for driving one of the pair of drive systems and one of the drive systems, and is supported by the first support portion of the support base. Since the other of the pair of drive systems is disposed on the second support portion of the base, the tilt table can be driven in tandem by one servo motor, and the tilt table can be increased in size, speeded up, and highly accurate. Can be realized at low cost.

  According to the invention which concerns on Claim 5, a pair of drive system is the 1st and 2nd rotation wheel and the 1st and 2nd rotation wheel which were supported so that rotation around the common axis line was respectively possible. Alternatively, the first and second cam shafts or worm shafts that mesh with the worm wheel, and first and second gear trains that are rotationally connected to the first and second cam shafts or worm shafts. Since the apparatus is disposed so as to rotationally connect between the first and second gear trains, the first and second gear trains, the first and second camshafts, or the worms are arranged on both sides of the movable body. It can be driven synchronously through the shaft and the first and second rotating wheels or worm wheels, respectively.

  According to the sixth aspect of the present invention, the movable body includes the slide table, and both end portions of the slide table can slide on the first and second guide rails installed on the support base with a predetermined interval. A servo motor that drives one of the pair of drive systems and one of the drive systems is disposed on the first guide rail side, and the other of the pair of drive systems is disposed on the second guide rail side. Thus, the slide table can be driven in tandem with one servo motor, and the slide table can be increased in size, speed, and accuracy at low cost.

  According to the seventh aspect of the present invention, the pair of drive systems includes a pair of ball screw shafts rotatably supported about an axis parallel to the first and second guide rails, and a screw threaded on each of the ball screw shafts. And a pair of ball nuts fixed to both ends of the slide table, and the rotary coupling device is arranged to rotationally couple between the pair of ball screw shafts. These can be driven synchronously through ball screw mechanisms each composed of a pair of ball screw shafts and a pair of ball nuts.

It is sectional drawing which shows the example which applied the movable body drive device which shows the 1st Embodiment of this invention to the tilt apparatus. It is sectional drawing cut | disconnected along 2-2 line | wire of FIG. It is sectional drawing cut | disconnected along the 3-3 line of FIG. It is the figure which expanded a part of FIG. It is a top view which shows the example which applied the movable body drive device which shows the 2nd Embodiment of this invention to the linear motion slide apparatus. It is a figure which shows the modification of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment in which a movable body driving device of the present invention is applied to a tilt device 10. In FIG. 1, a support 12 is installed on a bed or a slide table 11 of a machine tool such as a machining center. On both sides of the support base 12, first and second support portions 12 </ b> A and 12 </ b> B are arranged to face each other with a predetermined interval in the horizontal direction. Both end portions 13A and 13B of the tilt table 13 are supported by the first and second support portions 12A and 12B so as to be turnable around a common turning axis O1.

  At the center of the tilt table 13 in the direction of the turning axis O1, a rotating table 14 is supported so as to be able to rotate and index around a rotating axis O2 perpendicular to the turning axis O1, and a pallet that supports a workpiece W on the rotating table 14. 15 is carried in and out and is positioned and clamped. When the support table 12 that supports the tilt table 13 is fixed on the bed (11), the X-axis, Y-axis, and Z-axis movement of the spindle head (not shown) and the tilt table 13 are moved. The 5-axis control type machining center is constituted by the turning motion around the turning axis O1 and the rotation indexing motion around the rotation axis O2 of the rotary table 14. When the support table 12 that supports the tilt table 13 is installed on a slide table (11) that is supported on a bed so as to be movable in the Z-axis direction, for example, the X axis of a spindle head (not shown) And a Y-axis direction movement, a Z-axis direction movement of the slide table, a turning movement about the turning axis O1 of the tilt table 13, and a rotary indexing movement about the rotating axis O2 of the rotating table 14 A machining center is configured.

  A pair of (first and second) drive systems 20A and 20B having a configuration to be described later are disposed on the first and second support portions 12A and 12B of the support base 12. The first and second support portions 12A and 12B and the first and second drive systems 20A and 20B are symmetrically opposed to each other about the rotation axis O2, and basically have the same configuration. There is no.

  Therefore, in the following, the configuration of the first support portion 12A and the first drive system 20A will be described in detail, and the second support portion 12B and the second drive system 20B will be described with respect to the first support portion 12A. For the same components as described in the first drive system 20A, only A is indicated by B, and further description is omitted.

  As shown in an enlarged view in FIG. 4, a cylindrical rotating wheel 22 </ b> A is supported on the first support portion 12 </ b> A by a bearing 21 </ b> A composed of a cross roller bearing so as to be rotatable around the turning axis O <b> 1. On the circumference of the rotating wheel 22A, as can be understood with reference to FIG. 2, a plurality of rollers 23A are supported so as to be rotatable around the radial axis, and are camshafts 24A that mesh with the rollers 23A of the rotating wheel 22A ( 1) is supported by the first support portion 12A so as to be rotatable around an axis perpendicular to the turning axis O1.

  A hollow cylindrical body 25A to which the one end portion 13A of the tilt table 13 is integrally attached is fixed to the inner periphery of the rotating wheel 22A. On the inner periphery of the hollow cylindrical body 25A, a hollow shaft portion 26A is fixed to the first support portion 12A concentrically with the hollow cylindrical body 25A. The hollow cylindrical body 25A has an inner diameter sufficiently larger than the outer diameter of the hollow shaft portion 26A. As shown in FIG. 4, the hollow cylindrical body 25A has a gap between the inner peripheral surface of the hollow cylindrical body 25A and the outer peripheral surface of the hollow shaft portion 26A. An annular space 27 is formed, and a clamping sleeve 28A and a piston 29A for pressing the clamping sleeve 28A in the axial direction are provided in the space 27.

  The clamping sleeve 28A is a well-known one and is made of an elastic material in which a plurality of annular grooves are alternately formed on the inner and outer circumferences. When the clamping sleeve 28A is pressed in the axial direction by the piston 29A, the inner diameter is contracted. The outer diameter is enlarged. Due to the elastic deformation of the clamping sleeve 28A, the inner and outer peripheries of the clamping sleeve 28A are frictionally engaged with the inner peripheral surface of the hollow cylindrical body 25A and the outer peripheral surface of the hollow shaft portion 26A, so that the hollow cylindrical body 25A on the tilt table 13 side is engaged. It clamps with respect to the hollow shaft part 26A by the side of the support stand 12 side.

  As shown in FIG. 3, a servo motor 30 with an encoder is installed in the first support portion 12A. A first drive shaft 32 supported by a first support portion 12A via a bearing 31 so as to be rotatable about an axis parallel to the cam shaft 24A is coupled to the motor shaft 30a of the servo motor 30 by a coupling 33. Has been. A gear 34A is fixed on the first drive shaft 32, and the gear 34A is meshed with a gear 35A fixed to the shaft end of the cam shaft 24A as shown in FIG. Further, the transmission shaft 36 is supported by the first support portion 12 </ b> A via a bearing 37 so as to be rotatable about an axis parallel to the first drive shaft 32. A gear 38 that meshes with a gear 34A on the first drive shaft 32 is fixed on the transmission shaft 36, and the gear 38 is formed in the same shape as the gear 34A. A toothed drive pulley 39 is also integrally mounted on the transmission shaft 36.

  With the configuration described above, when the servo motor 30 is driven, the first drive shaft 32 directly connected thereto, the gear 34A on the first drive shaft 32, and the gear 35A on the cam shaft 24A meshing with the gear 34A. The cam shaft 24A is rotationally driven via the. The rotation of the cam shaft 24A is transmitted at a reduced speed to the rotating wheel 22A that meshes with the plurality of rollers 23A on the cam shaft 24A. As a result, the one end portion 13A of the tilt table 13 connected to the rotating wheel 22A is rotated around the turning axis O1.

  As shown in FIG. 3, a second drive shaft 41 is supported on the second support portion 12B via a bearing 42 so as to be rotatable around an axis parallel to the cam shaft 24B. The second drive shaft As shown in FIG. 2, a gear 43 that meshes with a gear 35 </ b> B fixed to the shaft end of the cam shaft 24 </ b> B is fixed on 41. The gear 43 is formed in the same shape as the gear 34A on the first support portion 12A side. A toothed driven pulley 45 having the same diameter as that of the drive pulley 39 is also integrally mounted on the second drive shaft 41. Between the driving pulley 39 and the driven pulley 45, a toothed timing belt 47 meshing with the pulleys 39 and 45 is stretched. The drive pulley 39, the driven pulley 45, and the timing belt 47 constitute a rotary coupling device 48.

  As a result, the rotation of the gear 34A on the first drive shaft 32 described above causes the gear 38, the transmission shaft 36, the drive pulley 39, the timing belt 47, the driven pulley 45, the second drive shaft 41, the gear 43, and the gear 35B. Is transmitted to the camshaft 24B, and the camshafts 24A and 24B are rotationally driven at the same rotational speed. At this time, the rotation of the gear 34 </ b> A of the first drive system 20 </ b> A driven to rotate by the servo motor 30 is reversed in the rotation direction by the gear 38, and the second rotation via the drive pulley 39, the timing belt 47 and the driven pulley 45. Since it is transmitted to the gear 43 of the drive system 20B, both the cam shafts 24A, 24B are rotationally driven in opposite directions. Accordingly, the rotational wheels 22A and 22B arranged symmetrically can be driven in the same rotational direction, and both end portions 13A and 13B of the tilt table 13 can be tilt-driven synchronously.

  In this way, both end portions 13A and 13B of the tilt table 13 can be driven synchronously by one servo motor 30, and one end side 13A of the tilt table 13 is tandem driven by two conventional servo motors. Similarly, the other end side 13B of the tilt table 13 is driven directly by the servo motor 30 and the rotation of the servo motor 30 is transmitted synchronously via the timing belt 47, so that one end of the tilt table 13 is transmitted from the servo motor 30. The axial rigidity of the side 13A is strong, and the axial rigidity of the other end side 13B from the servo motor 30 is weak. In this way, by directly driving the one end side 13A of the tilt table 13 by the servo motor 30, the axial rigidity of the one end side 13A of the tilt table 13 can be strengthened. 13 highly accurate tandem driving can be realized.

  As shown in FIGS. 1 and 4, a shaft portion 51 to which an encoder 50 is attached is fixed to the hollow cylindrical body 25 </ b> A on the first supporting portion 12 </ b> A side of the support base 12. That is, the turning angle of the tilt table 13 is detected. Further, as shown in FIG. 1, a hollow shaft portion 52 is fixed to the hollow cylindrical body 25B on the second support portion 12B side, and is fixed to the outer periphery of the shaft portion 52 by the second support portion 12B. The inner periphery of the cylindrical body 53 is fitted so as to be relatively rotatable. Between the outer periphery of the shaft portion 52 and the inner periphery of the cylindrical body 53, a distributor 54 that distributes the pressure oil to the inside of the tilt table 13 is configured, and the pressure oil distributed into the tilt table 13 via the distributor 54 is The pallet 15 is clamped and unclamped with respect to the rotary table 14. Further, a cable for supplying power to the indexing servo motor (not shown) for indexing the rotary table 14 through the hollow part of the shaft part 52 is inserted.

  Next, the operation of the tilt device 10 in the first embodiment will be described. When the pallet 15 supporting the workpiece W on the upper surface is carried onto the rotary table 14 and positioned and clamped, the control device (not shown) is rotated by a servo motor (not shown) so that the workpiece has a posture required for machining. The table 14 is rotated and indexed to a predetermined angular position, and the tilt table 13 is turned to a predetermined angular position by the servo motor 30. Thus, the rotary table 14 is positioned at a predetermined angular position, and the tilt table 13 is positioned at a predetermined tilt position. The tilt table 13 is clamped at that position by the pistons 29A and 29B and the clamping sleeves 28A and 28B. Is done.

  By the way, when the servo motor 30 is driven to position the tilt table 13 at a predetermined tilt position, the rotation of the servo motor 30 is performed via the first drive system 20A provided in the first support portion 12A. Then, it is directly transmitted to one end side 13A of the tilt table 13. That is, the rotation of the servo motor 30 is transmitted to the rotary wheel 23A at a reduced speed via the first drive shaft 32, the gears 34A and 35A, and the cam shaft 24A, and the one end side 13A of the tilt table 13 is directly driven. On the other hand, the direction of the other end side 13B of the tilt table 13 is reversed by a gear 38 meshing with the gear 34A, and the driving pulley 39, the timing belt 47 and the driven pulley 45, and the second drive of the second drive system 20B. The rotation of the servo motor 30 is transmitted to the rotary wheel 23A at a reduced speed through the shaft 41, gears 34B and 35B, and the cam shaft 24B, and the other end side 13B of the tilt table 13 is driven synchronously.

  As described above, according to the first embodiment, since both end portions 13A and 13B of the tilt table 13 can be driven synchronously by one servo motor 30, tandem driving can be realized at low cost. In addition, one end side 13A of the tilt table 13 is directly driven by the servo motor 30 similarly to the conventional tandem drive by the two servo motors, and the other end side 13B of the tilt table 13 is synchronized via the timing belt 47. Therefore, the shaft rigidity of the other end side 13B of the tilt table 13 can be weakened from the servo motor 30. As a result, the occurrence of creaking due to a synchronization error during tandem driving by the two conventional servo motors can be suppressed. The tandem drive of the tilt table 13 can be performed with high accuracy.

  According to the first embodiment described above, the two servo motors 30 synchronously drive the both end portions 13A and 13B of the tilt table 13 via the rotary coupling device 48 using the timing belt 47. Therefore, the large and heavy tilt table 13 can be tilted at high speed and with high accuracy by tandem driving. In addition, since the timing belt 47 is used for synchronization, the shaft rigidity from the servo motor 30 to the other end side 13B of the tilt table 13 can be weakened, such as scouring due to synchronization error during tandem driving by two conventional servo motors. Occurrence can be suppressed.

  Further, since both end portions 13A and 13B of the tilt table 13 are driven in tandem by one servo motor 30, tandem driving can be realized at a lower cost compared to the conventional technique in which tandem driving is performed by two servo motors. At the same time, since the first drive system 20A can be mechanically synchronized with the second drive system 20B as a slave, complicated control as in the past using two servo motors, for example, by parameters Servo adjustment and the like can be eliminated, and control can be simplified.

  FIG. 5 shows a second embodiment in which the movable body drive device of the present invention is applied to a linear motion table device 60.

  In FIG. 5, reference numeral 61 denotes a base member such as a bed. On the base member 61, first and second guide rails 63 and 64 are installed along the Z-axis direction, for example, with a predetermined interval. Has been. On the base member 61, a slide table 67 having a pair of guide blocks 65 and 66 slidably engaged with the first and second guide rails 63 and 64 attached to both front and rear ends is provided in the Z-axis direction. It is guided and supported so as to be movable.

  The base member 61 also includes first and second ball screw shafts 69, which are located on both sides of the first and second guide rails 63, 64 and constitute the first and second drive systems 20A, 20B. Both end portions of 70 can rotate around an axis parallel to the first and second guide rails 63 and 64 via bearings to a pair of support brackets 71 and 72 installed on the base member 61. It is supported. Ball nuts 73 and 74 are screwed onto the first and second ball screw shafts 69 and 70, respectively, and the ball nuts 73 and 74 are fixed to both ends of the slide table 67.

  A motor shaft 80 a of a servo motor 80 fixed to the support bracket 71 is connected to one end of the first ball screw shaft 69 by a coupling 81. The servo motor 80 is connected to an encoder 82 for detecting the rotation angle of the servo motor 80, and the encoder 82 can detect the rotation amount of the servo motor 80, that is, the movement amount of the slide table 67.

  A toothed drive pulley 83 is integrally attached to one end of the first ball screw shaft 69. On the other hand, a toothed driven pulley 84 is integrally attached to one end of the second ball screw shaft 70, and between the drive pulley 83 and the driven pulley 84, teeth meshing with both pulleys 83, 84. An attached timing belt 85 is stretched over. The drive pulley 83, the driven pulley 84, and the timing belt 85 constitute a rotary coupling device 48.

  According to the second embodiment described above, when the servo motor 80 is driven to slide the slide table 67, the rotation of the servo motor 80 is directly transmitted to the first ball screw shaft 69, and the second Rotation is transmitted to the ball screw shaft 70 through a drive pulley 83, a timing belt 85 and a driven pulley 84. Accordingly, the first and second ball screw shafts 69 and 70 are rotated synchronously in the same direction, and both sides of the slide table 67 are driven in tandem via the ball nuts 73 and 74. It slides along the two guide rails 63 and 64.

  Thus, also in the second embodiment, the two drive systems 20A and 20B provided at both ends of the slide table 67 can be synchronously driven by the single servo motor 80 via the timing belt 85. As a result, the slide table 67 can be slid at high speed and with high accuracy by tandem driving even if the slide table 67 becomes large and heavy due to the rotary table mounted thereon. In addition, since the synchronization is made via the timing belt 85, the shaft rigidity of the second drive system 20B can be weakened from the servo motor 80, and a sash caused by a synchronization error at the time of tandem driving by the two conventional servo motors. Can also be suppressed.

  In addition, since one end of the slide table 67 is driven in tandem by one servo motor 80, tandem driving can be realized at low cost, and the first ball screw shaft 69 side is mechanically connected to the master, Since the second ball screw shaft 70 is synchronized as a slave, complicated control as in the prior art using two servo motors is not required.

  In the above-described embodiment, the servo motors 30 and 80 are directly connected to one of the first and second drive systems 20A and 20B provided at both ends of the tilt device 10 or the linear slide device 60, and the first and second The example in which the rotation of the servo motors 30 and 80 is transmitted to the other of the second drive systems 20A and 20B via the timing belts 47 and 85 has been described.

  However, as shown in FIG. 6, the drive pulley 92 constituting the rotary coupling device 48 is driven by the servo motor 90 and the rotation of the drive pulley 92 is transmitted to the two driven pulleys 94 and 95 via the timing belt 93, respectively. The first and second drive systems 20A and 20B can be driven synchronously by these two driven pulleys 94 and 95, respectively.

  In the first and second embodiments described above, the rotation of the first drive system 20A driven by the servomotors 30 and 80 is rotated to the second drive system 20B via the timing belts 47 and 85. Although an example of transmission has been described, the rotary coupling device 48 using the timing belts 47 and 85 is effective when the first and second drive systems 20A and 20B are largely separated from each other. When the distance between the two drive systems 20A and 20B is relatively close, the first and second drive systems 20A and 20B can also be connected via a rotary connecting device 48 using a gear mechanism. That is, since the gear mechanism cannot avoid backlash, this backlash can weaken the shaft rigidity of the second drive system 20B from the servo motor 80, and the rotary coupling device 48 using the timing belts 47 and 85. It is possible to achieve the same effect as that.

  In the first and second embodiments described above, the movable body driving device of the present invention is applied to the tilt device 10 that tilts the tilt table 13 and the linear slide device 60 that slides the slide table 67, respectively. However, the present invention can be applied to any form that drives the movable body in tandem drive, such as a spindle head of a high-speed machining center that drives both ends of the movable body synchronously.

  Although the present invention has been described with reference to the embodiments, the present invention is not limited to the configurations described in the embodiments, and does not depart from the gist of the present invention described in the claims. It can take various forms.

  The movable body drive device according to the present invention is suitable for use in a machine tool including a movable body having two drive systems on both sides.

  DESCRIPTION OF SYMBOLS 10 ... Tilt apparatus, 12 ... Support stand, 12A, 12B ... Support part, 13 ... Tilt table, 13A, 13B ... Both ends, 20A, 20B ... Drive system, 22A, 22B ... Rotating wheel, 24A, 24B ... Cam shaft, DESCRIPTION OF SYMBOLS 30 ... Servo motor, 32 ... Drive shaft, 34A, 34B, 35A, 35B ... Gear train, 39 ... Drive pulley, 45 ... Drive pulley, 47 ... Timing belt, 48 ... Rotary coupling device, 60 ... Linear motion slide device, 63 , 64 ... guide rail, 67 ... slide table, 69, 70 ... ball screw shaft, 73, 74 ... ball nut, 80, 90 ... servo motor, 83, 92 ... drive pulley, 84, 94, 95 ... driven pulley, 85 93 Timing belt.

Claims (7)

  A movable body having a pair of drive systems on both sides, a rotary coupling device that rotationally couples between the pair of drive systems via a member having small rigidity, and the pair of drive systems tandem via the rotary coupling device A movable body drive device comprising a single servo motor for driving.   2. The servo motor according to claim 1, wherein the servo motor is directly connected to one of the pair of drive systems, and the rotation of one of the pair of drive systems is transmitted to the other of the pair of drive systems via the rotary coupling device. A movable body drive apparatus characterized by the above.   3. The movable body drive device according to claim 1, wherein the member of the rotary coupling device is constituted by a timing belt.   4. The first movable body according to claim 1, wherein the movable body includes a tilt table, and both end portions of the tilt table are arranged to face the support base with a predetermined interval. And the second support portion are rotatably supported around a common axis via a bearing, and the first support portion of the support base includes one of the pair of drive systems and one of the drive systems. The drive device for a movable body, wherein the servo motor for driving is disposed, and the other of the pair of drive systems is disposed on the second support portion of the support base.   5. The drive system according to claim 1, wherein the pair of drive systems includes first and second rotary wheels or worm wheels that are rotatably supported around the common axis, respectively. First and second cam shafts or worm shafts meshing with the first and second rotating wheels or worm wheels, and first and second gears rotationally connected to the first and second cam shafts or worm shafts A movable body drive device, wherein the rotary coupling device is disposed so as to rotationally couple between the first and second gear trains.   4. The movable body according to claim 1, wherein the movable body includes a slide table, and both end portions of the slide table are installed on the support base with a predetermined interval. The guide rail is slidably supported, and on the first guide rail side, one of the pair of drive systems and the servo motor for driving one of the drive systems are disposed, and the second guide rail The other side of said pair of drive system is arrange | positioned by the side, The drive device of the movable body characterized by the above-mentioned. 7. The pair of drive systems according to claim 6, wherein a pair of ball screw shafts rotatably supported around an axis parallel to the first and second guide rails are screwed to the ball screw shafts, respectively. A movable body having a pair of ball nuts fixed to both ends of the slide table, wherein the rotational coupling device is disposed to rotationally couple between the pair of ball screw shafts. Drive device.

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