TW200946891A - Vibration testing machine - Google Patents

Abstract

A vibration testing system which can perform vibration test by vibrating a work with a long period and a large acceleration amplitude. A direct drive converter in the vibration testing system comprises a direct drive converter frame fixed to the frame of the vibration testing system, an input shaft pivotally supported rotatably for the direct drive converter frame and coupled with the rotating shaft of a servo motor, a square thread formed at least partially on the outer circumferential surface of the input shaft, a roller having a tubular surface abutting against the flank of the square thread, a roller unit having a rotating shaft embedded therein for pivotally supporting the roller rotatably through a cylindrical roller bearing which is substantially entirely contained in the groove of the square thread, a rail fixed to the direct drive converter frame and sliding the roller unit straight along the axial direction of the square thread, and an output shaft coupled with the roller unit directly or indirectly and supporting a movable table at the upper end thereof wherein the roller screwing together with the square thread moves along the groove of the square thread as the input shaft rotates, and the output shaft interlocked with straight movement of the roller unit along the rail also moves straight to move the movable table up and down.

Description

❹ Ο 200946891 VI. Description of the invention: [Technical field to which the invention belongs] The device will be related to a kind of vibration test device, which is completely transformed by direct motion, and the complex rotary motion is converted into a linear reciprocating motion. The motion causes the object to vibrate. [First as technology] The tensile, compressive, and bending load is applied to the test object (workpiece) = the test device is known as the Japanese special opener 6·ΐ29969 Rose: using a servo motor to drive itself is - The type of linear converter is: This test device is a ball screw connected to the "four" shaft of the motor, and the crosshead (e Cong_) (the movable screw is engaged with the ball nut, by feeding Motor: Ϊ and solid; 2;::: turn 'and apply the load to the direction of the screw that is mounted on the crosshead:==, = screw.

===When the crosshead vibrates, the acceleration amplitude of the I-to-two-transformation can be changed so that when the vibration is read, the impact is caused by the long period and the collision between the big bead and the ball, etc.; weight 6 200946891 . When such an impact load is applied to the workpiece, the workpiece may exhibit an unintended behavior (e.g., using a shock load to cause a defect inside the workpiece). Therefore, the ball screw mechanism is used as the vibration test device of the linear motion converter, and it is not possible to use a vibration test in which the workpiece is vibrated by a long period and a large acceleration amplitude. SUMMARY OF THE INVENTION The present invention has been devised in order to solve the above objects. That is, the purpose of the present invention is to provide a vibration test apparatus capable of performing a vibration test for vibrating a workpiece under a long period of high acceleration amplitude. In order to achieve the above object, in the vibration tester according to the embodiment of the present invention, the linear motion converter includes: a linear motion converter skeleton fixed to a skeleton of the Jishen test; and an input shaft rotatably supported In the grain, the converter frame, and connected to the rotating shaft of the servo motor; the square screw has at least a part of the circumference of the input shaft; the roller (r〇ller) ^ S Γΐ on the thread side of the thread Cylindrical surface of (flank); the rotation axis of the roller single pattern '(4) is extinguished by a substantially whole body, and the K-tube roller bearing is used to measure the roller to be freely along the side = In the linear motion converter frame, the roller unit === is attached to the roller unit, and the upper end of the output shaft is supported: the liquid that can be combined, with the rotation of the shaft, and the square thread is screwed with the square thread The threaded groove moves, the roller unit moves along the front, and the output shaft moves straight along with these movements to 'cut the table up and down. In the vibration test apparatus according to the embodiment of the present invention, the feed screw having the square thread and the roller that abuts the one side surface of the mountain of the square thread are rolled as described above. The sub- and square-threaded turns and the 'moving block' moves up and down. In this way, since the output shaft is driven by the roller of the rotatable branch, even if the vibration direction of the switching thread is used to perform the vibration test, the nail-like interference is input to the movable block and the output shaft.情开4不© ❹ This allows the vibration test to be performed under long-term and large acceleration amplitudes. Furthermore, the fact that the bearing of the cylindrical surface supporting the roller in a rotatable manner with respect to the axis of the roller is substantially in the valley of the thread of the receiving thread, so that the radial direction is mainly applied to the bearing. Almost no bending load is applied. Therefore, according to the structure of the embodiment of the present invention, the roller can be smoothly rotated by using a large row of cylindrical roller bearing ‘which can sufficiently receive the radial direction. According to the embodiment of the present invention, it is possible to realize a vibration applying device capable of performing a vibration test for vibrating a workpiece under a long period and a root velocity amplitude. In addition, it is preferable that the structure is configured to have a plurality of rollers, and the two rollers included in the plurality of rollers are configured to be broken mountains. Preferably, the square thread is a plurality of screws. In order to vibrate at high speeds, it is desirable to increase the lead to increase the amount of stroke relative to the rotational angle of the two-engineering. At the same time, it is desirable to use a substantially equal angle (for example, every 18G.) to be a plurality of rollers in the circumferential direction of the square thread and a plurality of rollers corresponding to each of the segments 200946891 in order to make the table stronger. In this case, when the pitch of the square threads is reduced, the difference in the position in the axial direction of the square threads of the rollers of the one of the strips and the rails other than the rails can be reduced. Since the smaller the difference in this position, the shorter the length of the square thread can be shortened, so that the vibration test apparatus can be miniaturized. In the embodiment of the present invention, as described above, the square threads are formed into a plurality of threads, and the pitch with respect to the lead is reduced. Therefore, the workpiece can be vibrated at a high speed, and the table can be strongly supported, and a small vibration test device can be realized. Further, the structure further has a reinforcing means for reinforcing a pair of rollers to the mountain to hold the square thread. At this time, the mountain of the square thread is reinforced from the upper and lower sides, thereby preventing elastic deformation of the mountain. Therefore, the situation in which the unexpected load is applied to the roller and the output shaft due to the elastic deformation of the mountain does not occur. Further, preferably, the roller unit has a groove formed between the pair of rollers, and the reinforcing means adjusts the interval of the pair of rollers by adjusting the interval of the groove and presses the pair The load of the mountain to the aforementioned square thread is enhanced. For example, the reinforcing means has: a first through hole that is perforated from one end of the roller unit to the groove; and a second through hole that is perforated from one end of the roller unit to the groove, and a mother is formed on the inner circumference. a female threaded hole that faces the first through hole via the grooved groove and extends toward the other end of the roller unit; the first bolt is screwed into the female threaded hole through the first through hole; and the second bolt a second through hole is screwed into the second through hole; wherein a head of the first bolt presses one end of the roller unit to apply a load in a direction in which the width of the groove is reduced to the roller unit, and a front end portion of the second bolt The groove is pressed to apply a load on the roller unit in the direction 200946891 which increases the width of the groove. - In addition, it is preferred that the frame constitutes a square thread, a roller unit and a bar for receiving a towel filled with a lubricating (four) easing body. When such a structure is made, the roller can be more smoothly rotated because the friction between the roller and the square thread can be reduced. For example, the housing body has a bottom plate formed with an opening for mounting a bearing for rotatably supporting the input shaft, and a top plate formed with an opening for slidably attaching the wire Supporting output (4) bearing; it is provided between the opening π of the bottom plate and the wheel mandrel, and between the opening of the top plate and the output shaft, and an oil seal for preventing leakage of lubricating oil. The gentleman's skill is that the 'roller unit has: a moving block, which moves with the rail and the second strip; the movable block has a concave portion that surrounds the strip; the moving direction of the movable portion is formed in the concave portion; Loop; m:, 'The moving direction of the connecting groove is formed with the ditch to form a closed blood. The bead' loops in the closed loop and is located at the time of the ditch. The TM block is not different: ::::: The good-moving block is formed with four closed loops; the knives are arranged in four closed-yang bead balls, which are opposite to the rolling angles of the two closed-loop grooves of the movable block H, respectively, and are arranged at = When the soil is in contact with this structure at 45°, the movable block has about ±45. Contact angle. When the transverse direction, the radial direction, the reverse radial direction and the upward attack direction of the transverse direction are more important than the movable block, the movable block is also *damaged, and in addition to the 200946891, it can be smoothed along the line. Move on the ground. [Embodiment] Hereinafter, the actual form of the present invention will be described in detail using the drawings. The first drawing is a front view of the vibration test apparatus of the present embodiment. The vibration test apparatus of the present embodiment can repeatedly apply the tensile compression, or the bending weight on the object (workpiece) or cause the workpiece to vibrate. In addition, in the following description, if it is not specified in the drawings, the directions of "upper", "lower", "left", "right", "front", and "inside" are the front view of the first figure. Set as the benchmark. As shown in the first figure, the test apparatus 1 of the present embodiment has a device body 1 that applies a load on the workpiece W or vibrates the workpiece W, and a servo amplifier that drives the servo motor 12A of the apparatus body 1A. 200 and a control unit 300 that controls the servo amplifier 200. The apparatus body 100 has a skeleton 110, a servo motor 120, a linear motion converter 4A, a load cell 140, a displacement sensor 150, adapters 181 and 182. The linear motion converter 400 is a motion for converting the rotational motion of the rotational shaft of the servo motor 120 into the straight forward direction. The linear motion converter 4 is fixed to the upper surface of the table portion 111 of the bobbin 110, and is coupled to the rotation shaft of the servo motor 12A. When the servo motor 120 is driven, the movable table 130 provided at the upper portion of the linear motion converter 400 moves up and down with respect to the table portion 111. A lower adapter 181 for holding the workpiece W from below is mounted on the movable table 130. From the underside of the top portion 112 of the skeleton 110, the upper stage 11 ❹ ❿ 200946891 160 is suspended. Further, on the upper surface of the table portion 1, a pair of guide bars 171 extending in the upward direction in the drawing are provided. In the upper stage 60 (stage: stage), through holes 161 having perforations in the vertical direction are formed at the end portions in the left and right directions, and the respective lead rods 171 pass through the through holes. Therefore, the upper stage can be moved in the up and down direction along the guide bar 171. Further, by locking the bolts 5 which are not shown on the upper stage 160, the inner diameter of the through hole can be reduced, whereby the upper stage 160 can be fixed to the guide bar 171. On the lower surface of the upper stage 160, an upper adapter 182 for holding the workpiece W from above is mounted. In the present embodiment, by moving the movable table 130 up and down while maintaining the workpiece % between the upper portion 182 and the lower adapter 181, it is possible to apply a load to the workpiece. Further, the upper and lower adapters 182 and 181 are detachable from the movable table 130 and the movable table 130, and can be appropriately applied in accordance with the type of the load of the workpiece W. = a structure for applying a tensile load on the workpiece W, because the second; the V, and the lower jaw adapter 181 are chucks for holding the workpiece w == compressive load is applied to the workpiece w in order to enable 182 The compressed workpiece W' needs to be written using the upper adapter. On the top of the 一下 一下 转接 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 181 Used in combination. In the case where the vibration test of the guard W vibration is performed, the lower portion m' of the function fixed to the movable table 130 is used without using the upper adapter 182. These transfer y-knifes are only examples, and other types of adapters can be used. In addition to 12 200946891, other combinations can also be used. Further, the upper stage 160 is hung from the top 112 of the bobbin 110 by the "," screw 175. The top cymbal 2 is embedded with a nut 173 that is engaged with the feed screw 175 and rotatable. The nut 173 is coupled to the motor 172 disposed at the top portion U2 by an endless belt, and is driven to rotate about the axis of the feed screw 丨 75 by the motor 172. Further, the lower feed of the feed screw 175 is coupled to a link l74 fixed to the upper stage 160, and the feed screw 175 is rotated about its axis with respect to the upper stage 160. Therefore, the nut 173 can be rotated in the up and down direction and the feed screw 175 can be driven in the up and down direction while the upper stage 16 is detachable by loosening the bolt of the upper stage 160. The upper stage 160 is connected. This function is used to match the size of the workpiece to adjust the spacing between the adapter 181 and the adapter 182. After the interval between the adapter 181 and the adapter 182 is adjusted, the bolt is locked to fix the upper stage 16A to the guide 171 before the test. In the above-described configuration, when the workpiece W is driven by the adapters 181, 182 to drive the servo motor 12, a tensile, compressive or bending load is applied to the workpiece w, and the size is measured by the force measuring device. 14〇 to measure. Further, the displacement sensor 150 is a sensor that detects the displacement of the lower adapter 181, that is, the amount of deformation of the workpiece W (for example, a dial gage equipped with a rotary encoder). The control unit 300 inputs the target angle, the target angular velocity, and the like to the servo amplifier 200 at any time. The servo amplifier 2 控制 controls the drive 13 200946891 of the servo motor 12 〇〇 based on the target angle input by the control unit 3 与 and the target angular velocity. The output of the load cell 140 and the displacement sensor 15A is input to the control unit 300, and the control unit 3〇〇 can be based on the load f measured by the load cell 14〇 and the displacement measured by the displacement sensor 150. In the displacement of the table 13〇, the target angle of the input servo amplifier 2〇〇 and the target angular velocity ^ are set. For example, in the case where the workpiece w is vibrated under a fixed load amplitude, the closer the load detected by the load cell 14 接近 is to the maximum load, the smaller the target angular velocity given to the servo amplifier 200 is, so that the maximum load is reduced. The speed of the movable table 132 is 〇 (that is, the target angular velocity given to the feed amplifier 2 会 becomes 0). Similarly, based on the detection result of the displacement sensor 150, the control unit 3 can give the servo amplifier 200 a target value in which the displacement amplitude, the velocity amplitude, or the acceleration amplitude of the movable table 132 is slightly constant. v The structure of the linear motion converter 400 of the vibration testing device 1 of the present embodiment will be described in detail below. The linear motion converter 400 includes an outer casing 410 having a substantially rectangular parallelepiped shape, and a linear connecting rod 461 penetrating the upper surface of the outer casing 410 and protruding upward. The movable table 130 is fixed to the upper end of the linear connecting rod 461. Further, the rotation shaft of the servo motor 120 is coupled to the input shaft 420 of the linear motion converter 400 via a coupler. A large portion of the input shaft 42A is housed in the casing 410, and the input shaft 420 is coupled to a linear motion mechanism that converts the rotational motion into a linear motion in the vertical direction. The up and down motion as the output of this linear motion mechanism is transmitted to the linear connecting rod 461. Therefore, when the servo motor 120 is driven, the linear connecting rod 461 moves up and down. Next, the structure of the moving mechanism of the straight 14 200946891 accommodated in the casing 41 will be described in detail using the drawings. The second diagram is a front view of the linear motion converter 400, which cuts the front side plate 414F (described later) of the outer casing 410 so that the inside of the outer casing 41 is exposed. The third drawing is a side view of the linear motion converter 4A seen from the right, which cuts the right side plate 413R (described later) of the outer casing 410 so that the inside of the outer casing 410 is exposed. The fourth drawing is a plan view of the linear motion converter 4' which cuts the top plate 412 (described later) of the outer casing 410 to expose the inside of the outer casing 41'. Further, in the second drawing, the periphery of the upper and lower bearings 451, 452 which rotatably support the input shaft 420 is shown in a sectional view. Further, in the third figure, the oil seal portions of the upper and lower bearings 451, 452 and the linear connecting rod 461 are shown in cross section. In the fourth figure, the input shaft 420 is shown in dashed lines. First, the configuration of the outer casing 410 will be described. The outer casing 410 is a bottom plate 411, a top plate 412, a left side plate 413L (second diagram, fourth diagram), a right side plate 413R (second diagram, fourth diagram), and a front side panel 414F (third diagram, fourth diagram) And the inner side plate 414B (the third figure and the fourth figure) are connected by screwing, welding, or the like to form a rectangular parallelepiped shape. The bottom plate 411 is a table portion 111 which is fixed to the frame 11 by bolts. Further, the bottom plate 411 is provided with an opening 411a for passing the input shaft 420. Further, the top plate 412 is provided with an opening portion 412a for mounting the upper bearing 451, and an opening portion 412b (third diagram) for passing the linear connecting rod 461. As shown in the second figure, the left-right direction dimension of the bottom plate 411 is longer than the interval between the right side plate 413R and the left side plate 413L, and both ends of the bottom plate 411 in the left-right direction become left and right from the right side plate 413R and the left side plate 413L. 15 200946891 A flange-like flange portion 41 lb is formed. With this flange portion 411b, the bottom plate 411 can be fixed to the table portion 111 of the bobbin 110 via bolts not shown. The outer surfaces of the right side plate 413R and the left side plate 413L are provided with ribs 415 which protrude perpendicularly from the center in the depth direction. The rib 415 is strongly fixed to the right side plate 413R, the left side plate 413L, and the bottom plate 411 by a fillet weld. Openings 413a are formed in the center portions of the right side plate 413R and the left side plate 413L, respectively. This opening portion 413a is used in the inlet and outlet casing 410 when assembling and checking the linear motion converter 400. When the vibration test apparatus 1 is used, the cover 416 is bolted to the right side plate 413R and the left side plate 413L, whereby the opening 413a can be closed. Next, referring to the second to fifth figures, a mechanism for converting the rotational motion of the input shaft 420 into the vertical movement of the linear connecting rod 461 will be described. Further, the fifth figure is an I-Ι cross-sectional view of the fourth figure. As shown in the second figure, a male thread portion 421 is formed at a slightly central portion of the input shaft 420. A pair of roller units 430L and 430R that are engaged with the male screw portion 421 are provided on both sides of the male screw portion 421 in the left-right direction. The roller units 430L and 430R have an upper roller 431, a lower roller 432, a coupling plate 433, and a movable block 434, respectively. The upper roller 431 and the lower roller 432 are bolted to the coupling plate 433. Furthermore, the connecting plate 433 is bolted to the movable block 434. Therefore, the movable block 434, the connecting plate 433, the upper roller 431, and the lower roller 432 are integrated. The pair of movable blocks 434 are engaged with a bar 435 (fourth view) which is respectively fixed to the inner walls of the right side plate 413R and the left side plate 413L by bolts. The rails 16 200946891 435 extend in the up and down direction (second diagram, third diagram). The moving directions of the roller units 430L, 430R including the movable block 434 are limited only to the upper and lower directions. Next, the supporting structure of the upper roller 431 and the lower roller 432 will be described. As shown in Fig. 5, the upper roller 431 and the lower roller 432 have shaft portions 431a and 432a, respectively, and roller portions 431b and 432b rotatable around the shaft portion. Further, as shown in the third to fifth figures, the shaft portions 431a and 432a are fixed to the coupling plate 433 by a set screw 436.

Cylindrical roller bearings 431c and 432c are provided between the roller portions 431b and 432b and the shaft portions 431a and 432a, whereby the roller portions 431b and 432b are rotatable around the shaft portions 431a and 432a. Next, the engagement state of the male screw portion 421 and the roller units 430L, 430R will be described. As shown in the second and fifth figures, the section "the shape of the valley 421b is slightly rectangular" with respect to the male thread portion 421 is a so-called square thread. Further, the roller portions 431b and 432b are cylindrical, and the roller portion 431a of the upper roller 431 is reinforced and closely attached to the upper side of the male screw portion 421 (that is, the upper side of the mountain 421a). The roller portion 432a of the roller 432 is reinforced so as to be in close contact with the thread side surface 421d of the butt side of the male screw portion 421 (that is, the lower surface side of the mountain 421a) (hereinafter, the rolling of the respective roller units 430L, 430R) The sub-portions 431b and 432b cool the mountain 421a of the male screw portion 421. As described above, the moving directions of the roller units 430L and 430R are limited only to the up-and-down direction, and the upper roller 431 and the lower roller 432 are naughty. The portions 431b and 432b are in close contact with the thread side faces 421c and 421d of the male screw portion of the input shaft 420. Therefore, when the servo motor 12 is driven (p. 17 200946891) to rotate the input shaft 420, the roller portions 431b, 432b Rotating along the thread side faces 421c, 421d of the male screw portion 421, respectively, the roller units 430L, 430R move up or down in response to the rotation direction of the input shaft 420. The roller portion 431b for the roller units 430L, 430R will be described below. , 432b is pressed on the thread side of the male screw portion 421 The reinforcing mechanism of the 421c, 421d. As shown in the third figure, the center portion of the connecting plate 433 of the roller unit 430R is formed with an opening 433a' from the opening 433a toward the front side of the connecting plate 433 (toward the front side plate 414F). A groove portion 433b is formed. The shaft portion 431a of the upper roller 431 is fixed to the coupling plate 433 on the upper side of the grooved groove 433b, and the shaft portion 432a of the lower roller 432 is fixed to the coupling plate at the lower side of the grooved groove 433b. 433. The upper surface 433M of the connecting plate 433 facing the groove 433b is provided with through holes 433c and 433d. The through holes 433c and 433d are disposed on the front side of the shaft portion 431a of the upper roller 431, and the through hole 433c The hole 433e is formed at a position facing the through hole 433c in the lower surface 433b2 of the groove 433b. The hole 433e is formed with a female thread, and the first bolt 437a passes through The hole 433c is screwed into the hole 433e. Therefore, when the first bolt 437a is locked, the connecting plate 433 is reinforced in a direction in which the width of the grooved groove 433b is narrowed. Further, the through hole 433d is also formed with a female thread, and the second bolt 437b is screwed into the shell hole 433d. The front end of the second bolt 437b abuts against the lower surface 433b2 through the upper surface 433M of the grooved groove 433b. Therefore, when the second bolt 437b is locked, the connecting plate 433 is enhanced in the width of the groove 433b to be wider than 200946891. . In this state, as shown in the third figure, by the upper surface of the connecting plate 433 abutting against the head of the first bolt 437a, the width of the grooved groove 433b is restricted to be wide, and by the groove 433b The lower surface 433b2 abuts the second bolt 437b' and the width of the grooved groove 433b is not narrowed. Thus, by adjusting the degree of locking of the first and second bolts 437a, 437b to adjust the width of the grooved groove 433b, the interval between the upper roller 431 and the lower roller 432 can be adjusted. Here, when the interval between the roller portion 431b of the upper roller 431 and the roller portion 432b of the lower roller 432 is reduced to be smaller than the width of the mountain 421a of the male screw portion 421 of the input shaft 420, it is possible to utilize The large reinforcing force causes the roller portions 431b, 432b to abut against the thread side faces 421c, 421d. Since the roller portions 431b and 432b are brought into close contact with the screw side faces 421c and 421d of the male screw portion 421, the roller portions 431b and 432b can be smoothly rotated without being shaken when the input shaft 420 is rotated. The roller portions 431b and 432b of the roller unit 430L are also reinforced with the same configuration as the roller unit 430R to be in close contact with the thread side faces 421c and 421d of the male screw portion 421 of the input shaft 420. In the present embodiment, since the mountain 421a of the male screw portion 421 is sandwiched by the pair of rollers 431 and 432, even if the deformation of the mountain 421a from which the load is applied to the male screw portion 421 is changed by another roller The child is obstructed, and as a result, the mountain 421a is not easily bent. Therefore, even if the input shaft 420 is rotated at a large angular acceleration speed, the positional displacement of the roller unit 430R does not occur due to the bending of the mountain 421a. As described above, the roller portions 431b and 432b are supported by the cylindrical roller bearings 431c and 432c so as to be rotatable with respect to the shaft portions 19 200946891 43la and 432a. The roller of the cylindrical roller bearing can sufficiently withstand a large compressive load applied in the radial direction, and on the other hand, with respect to the rhyme load applied to the radial f direction, it may be deformed due to a relatively small load or Broken, the characteristics. Therefore, in the present embodiment, no weight is applied to the roller in the shearing direction. Specifically, as shown in the fifth figure, the cylindrical roller bearings 431c, 432c = most of which are projected into the valley 421b of the male thread portion 421, and substantially not, the cutting load is applied to the cylindrical roller bearing. 431c, 432c. Since only the front end portion of the cylindrical roller bearings 431c and 432c protrudes into the male screw portion 421 = σ 421b, a shear load is applied to the cylindrical roller at a portion abutting the front end portion of the mountain 421 & The bearings 431c, 432c, the large load of the shear = direction will be applied to the roller. On the other hand, in the present embodiment, the cylindrical roller bearings 431e and 432e are engaged with the mountain 42u of the male screw portion 421 in the axial direction of the cylindrical roller bearing 431e, 432e, so that the cylindrical roller will be 432 〇. The mountain 421 & of the male threaded portion 421 receives the compressive load in the direction of the direction, and there is almost no shearing and adding to the roller. Therefore, the roller portion i3Th bearings 43ic and 432c can sufficiently withstand the large load even in a state where a large load acts between the mountains 421 & amp of the roller portions 431b and 432b, and the ilib, 432b can smoothly Rotate. This stick is connected to the block 438 (third figure, fourth figure). Hereinafter, the lower end 46ia of the moon bar 461 is held as a flute: the holding structure of the retracting bar 461. As shown in the first and fourth figures, the rod connecting block 438 is provided with a penetration of 20

200946891 The diameter of the circular section of the up and down direction is a linear connection 438a. This through hole (four) a is outside, and the diameter of the tip of the lower end of this cross ^ 4 = is large. The front end of the 438 (in the roller: = circumferential surface, there is provided a grooved groove 43 which is the right end of the scorpion 3 〇 L in the rod coupling block 430R and the left 舄 in the roller unit). The through hole 4 of the slotted groove 438b is orthogonal to each other: = Λ 8d is formed by the through hole 4 through the slotted groove 4, and the through hole 4 is formed in the vicinity of the wheeled shaft 42G. Therefore, when the linear connecting rod 461 passes through the through hole 438a, the hard plug is passed through the through hole 438c and screwed into the through hole side, the rod block 438 is deformed so that the diameter of the through hole gamma becomes small, and the lower end of the linear connecting rod 461 461a is fastened to the rod joint block 438. Thereby, the linear connecting rod 461 can be fixed to the rod connecting block 438. Therefore, by rotating the input shaft 42 by the servo motor 120 (first drawing), the linear connecting rod 461 can be moved up and down. Further, by periodically switching the rotation direction of the input shaft 420, the linear connecting rod 461 and the movable table 13 fixed to the upper end of the linear connecting rod 461 can be vibrated upward and downward. As shown in the second figure, the lower surface of the top plate 412 of the casing 410 is provided with an upper limit detecting sensor 441, and the upper surface of the bottom plate 411 is provided with a lower limit detecting feeling 442. Both the upper limit detection sensor 441 and the lower limit detection sensor 442 are proximity sensors. The upper limit detecting sensor 441 can detect the approach of the upper end of the roller unit 430R on the right side, and the lower limit detecting sensor 442 can detect the approach of the lower end of the roller unit 430L on the left side. In the present embodiment, when the upper limit detecting sensor 441 or the lower limit detecting sensor 442 detects the approach of the 2009 unit 891 to the roller units 430R, 430L, the servo motor can be stopped in an emergency. In the present embodiment, the inside of the casing 410 is filled with lubricating oil. Therefore, the friction between the upper and lower rollers 431, 432 and the male screw portion 421 of the input shaft 420 and the friction between the movable block 434 and the rail 435 can be alleviated. The support mechanism of the input shaft 420 will be described below. As shown in the second figure, the input shaft 420 is rotatably supported at its upper end by an upper bearing 451 451 which is a ball bearing, and is also combined by the position of the opening 411a of the bottom plate 411. The lower bearing 452 of the bevel ball bearing is rotatably supported. As shown in the second figure, the upper end of the input shaft 420 is formed with a step portion 422 having a small diameter, and the inner ring of the upper bearing 451 is mounted to the step portion 422. Further, the upper end of the input shaft 42A is fitted with the buckle 423, and the inner ring of the ball bearing 451 is not fixed in the vertical direction by being held by the step portion 422 and the buckle 423. On the other hand, the opening 412a of the top plate 412 is tightly fitted with respect to the outer ring of the upper bearing 451, and the outer ring of the upper © bearing 451 is fitted into the opening 412a of the top plate 412. In the present embodiment, as described above, the inside of the casing 410 is filled with lubricating oil. To prevent leakage of lubricating oil, the opening 412a of the top plate 412 is covered by the cover 453. The cover plate 453 is bolted to the top plate 412. Further, a circumferential groove 453a is provided on the surface of the cover plate 453 which abuts against the inner circumferential surface of the opening 412a, and the lubricating oil is prevented from the cover plate 453 and the opening by the ring which is not shown here. The gap in 412a leaks out. Next, the mounting structure of the lower bearing 452 will be described. In the input shaft 420 22 200946891, the step portion 424 becomes smaller than the upper surface of the bottom plate 411. At the lower position 4, a diameter is formed to abut against the step. A step portion 424 (C〇llar) 450 in which the upper surface of the inner ring of the shaft t452 is formed with the outer peripheral surface of the shaft t452 is screwed into the common portion 425. By the inner ring of the shaft (four). : [=5, you can get from the lower part of the lower part of the lower ❹ ❹ ❹ - — — — = === _ ht ht 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合 组合Therefore, the upper bearing 451 phase is fixed so that it cannot be fixed in the up-and-down direction by 3 squares/two: the opening 4Ua of the bottom plate 4U is provided with a lit bearing, and the member 455* is used to penetrate the input shaft in the center = Chuanbei 4 The tubular member formed by 55e is provided with a flange portion at its lower end, and the flange portion 455a is fixed to the lower surface of the bottom plate 411 by bolts, and the bearing support member 455 can be fixed to the bottom plate 4 ι. Further, on the outer circumferential surface of the bearing support member 455, a circumferential desert 455b is provided at a position opposite to the inner circumference of the opening 4Ua, and the lubricating ring is prevented from being supported by the bearing by the cymbal ring provided here but not shown. The gap between the member 455 and the opening 411a leaks out. Further, the through hole 455c of the bearing support member 455 is formed with a step portion 455d which becomes larger in the radial direction. The portion above the step portion 455d of the through hole 455c is tightly fitted with respect to the outer ring of the lower bearing 452, and the outer ring of the lower bearing 452 is fitted therein. Further, the diameter of the segment 23 200946891 of the through hole 455c and the outer ring of the lower ring bearing 452 of the outer ring of the lower bearing 452 are fixed by the upper end of the step portion 45 5 d 454 by the bearing stop 455^tr The inner diameter of the outer ring. Further, the height 'from the upper end of the step portion 452 member 455 is equal to or lower than the lower shaft by the screw, the outer ring member 455' of the bearing stopper 454 is thereby made the lower bearing 452 The coffee is clamped and fixed without the 4 method 54 at the step of 4.55. The inside of the case 41 is filled with lubricating oil, in order to prevent the 455/Γ (4) from entering the through hole of the bearing support member 455. In the body gap (four) 'with oil seal 458. The oil seal 458 is embedded in the pair of holes of the oil-encapsulating member 457 of the part; the upper branch: = cow; the lower side of the 5, the installation is not shown here, the ring is formed The groove is rotated by the upper (four) of =:==, and the lubrication is prevented: oil; = rub causes the outer circumference of the input shaft (4) to leak. From the inner circumference of the seal 458 and the input shaft, as described, the linear connecting rod w is topped from the outer shell of the outer shell 24 200946891 j (above). Therefore, in the present embodiment, in order to prevent leakage of oil from the gap between the linear connecting rod 461 and the top plate 412, a cover plate 464 to which oil is attached is provided. The structure of the cover 464 will be described below. As shown in Fig. f, the linear connecting rod 461 is supported by a bush 462 at a position slightly lower than the top plate 412. The inner circumference of the bushing 462 is configured to be slidable with the outer circumference of the sexual connection rod 461. The bushing 462 is fixed to the top plate 412 by the bushing mounting member 463 and the cover plate 464 fixed to the top plate = 2 \ the bushing mounting member 463 and the cover plate 464 are not shown. The bushing mounting member 463 is a cylindrical member in which the bushing 462 is fitted, and the lower end thereof is provided with a step portion 463a that expands inward in the radial direction. The upper surface of the step portion 463a abuts against the lower surface of the bushing 462 to support the bushing 462 from below. Further, the cover plate 464 is a cylindrical member in which the rod 461 is linearly connected, and its inner diameter is smaller than that of the bushing 462. Therefore, when the cover plate 464 is integrally formed with the bushing mounting member 463 by the bolt, the bushing 462 is clamped and fixed between the lower surface of the cover plate 464 and the upper surface of the step portion 463a of the shaft mounting member 463. . The outer circumference of the bushing 462 is provided with an annular groove 462a. By providing an annulus not shown here, the gap between the outer circumference of the bushing 462 and the inner circumference of the bushing mounting member 463 can be prevented. Missing out. Similarly, an annular groove 464b is formed on the outer circumference of the cover plate 464 opposed to the inner circumference of the bushing mounting member 463. By installing a ring (not shown), the lubricating oil can be prevented from being installed from the bushing. The gap between the inner circumference of the member 463 and the outer circumference of the cover 464 leaks. In addition, an annular groove 464a is formed in the inner periphery of the cover plate 464. 25 200946891 The groove 464a is also provided with an oil seal. The outer circumference of the linear connecting rod 461 can also move up and down while sliding with the oil seal, and the oil seal can prevent the lubricating oil from leaking from the sliding surface. Next, the configuration of the movable block 434 and the bar 435 of the present embodiment will be described in detail using the drawings. The sixth drawing is a cross-sectional view in which the movable block 434 and the bar 435 are cut off on one side perpendicular to the long axis direction of the rail 435. The seventh drawing is a II-II cross-sectional view of the sixth drawing. As shown in the sixth and seventh figures, the movable block 434 is formed with a recess surrounding the rail 435, and the recess is formed with four grooves 43 and 434a' extending in the axial direction of the rail 435. A plurality of stainless steel balls 434b are housed in the grooves 434a and 434a'. The inside of the bar 435 is provided with grooves 435a, 435a at positions opposite to the grooves 434a, 434a of the movable block 434, so that the balls 434b are clamped to the grooves 434a and 435a, or the grooves 434a, and the grooves 435a. between. The cross-sectional shape of the grooves 434a, 434a', 435a, 435a' is an arc shape, and the radius of curvature is slightly equal to the radius of the balls 434b. Therefore, the balls 43 are in close contact with the grooves 434a, 434a, 435a, 435a' in a state where there is almost no gap. The inside of the movable block 434 is provided with four ball avoiding paths 434c which are substantially parallel to the respective grooves 43. As shown in the seventh figure, the groove 43 and the avoidance path 434c are connected to each other via the u-shaped path 434d at both ends, and the groove 43 such as the groove 435a, the avoidance path 434c, and the U-shaped path 434d are formed to circulate the ball 434b. The cycle road. The same circulation path is also formed for the avoidance path 43 and the grooves 43 and 435a'. Therefore, when the movable block 434 is moved relative to the rail 435, the plurality of balls 434b are looped in the circulation path when the grooves 434a, 434a, 4, 4, and 2 are rolled. Therefore, even if a large load is applied in a direction other than the rail, a plurality of balls can be used to support the movable block while rolling the balls 434b to keep the resistance in the direction of the rail axis small, so that the movable block 434 can be made relatively The bar 435 moves smoothly. Further, the inner diameters of the 'avoidance path 434c and the U-shaped path 434d are slightly larger than the diameter of the ball 434b, and the frictional force generated between the avoidance path 434c and the U-shaped path 434d and the ball 434b is extremely small, so that it does not hinder The cycle of balls 434b. As shown in the figure, the row of the two rows of balls 434b held by the grooves 434a and 435a has a contact angle of about 45. The front combination of the angular contact ball bearing (angular contact ball bearing). The contact angle in this case is the angle between the contact points of the grooves 434a and 435a in contact with the balls 434b, and the radial direction of the linear guide (the direction from the movable block toward the strip). The bevel contact ball bearing thus formed can support the reverse radial direction (direction from the rail toward the movable block) and the lateral direction (the direction orthogonal to both the radial direction and the advancing and retracting direction of the movable block. The load of the direction). Similarly, the groove 434a is clamped to form a contact angle with the rows of the two rows of balls 43 of 435a (the grooves 434a, and 435a, the contact points of the contact points with the balls 434b, and the reverse radial direction of the linear guide). The angle formed by the direction is a 45° front combined type of bevel contact ball bearing. This bevel contact ball bearing is capable of supporting the load in the direction and the lateral direction. In addition, the two rows of balls and columns which are respectively clamped to the groove 43 as shown in Fig. 43 (the left side of the drawing 434a, and 435a (the left side in the figure) are also formed into a front combined type oblique contact ball bearing. Similarly, 27 200946891 is respectively sandwiched between the other side of the grooves 434a and 435a (left side in the figure) and the groove 434a, and the other row of the other side (left side in the figure) of the row 435a also forms a front combination. In the present embodiment, the load acting on the radial direction, the reverse radial direction, and the lateral direction is supported by the front combined type oblique contact ball bearing. The large load applied in the direction other than the direction of the rail axis can be sufficiently supported. The following shows the test results of the vibration test apparatus of the present embodiment. The eighth diagram is the vibration of the present embodiment driven at an acceleration amplitude of 0.7 G and a frequency of 5 Hz. In the test apparatus 1, the vibration waveform measured by a vibration pickup mounted on the movable table 13A. As shown in the figure, the vibration in the present embodiment can be known. In the inspection apparatus, the movable table 130 can be vibrated by an acceleration waveform with less noise (near sinusoidal wave). As a comparative example, the linear motion converter 400 of the present embodiment is used instead of the feed screw mechanism. The test result of the vibration test device of the change mechanism. The ninth figure is the vibration test device mounted on the movable table when the vibration test device of the comparative example is driven at an acceleration amplitude of 0.7 G and a frequency of 5 Hz. The measured vibration waveform. As shown in the figure, it can be seen that in the vibration test apparatus of the comparative example, spike noise caused by the collision between the balls of the ball screw mechanism is generated and cannot be approached. The acceleration waveform of the sine wave causes the movable table to vibrate. [Brief Description] 28 200946891 The first drawing is a front view of a vibration testing device according to an embodiment of the present invention. The second drawing is a vibration testing device according to an embodiment of the present invention. Front view of the linear motion converter. Fig. 2 is a right side view of the linear motion converter of the vibration testing device according to the embodiment of the present invention. A plan view of a linear motion converter of the vibration test apparatus according to the embodiment. 第五 The fifth diagram is a cross-sectional view taken along the line I-Ι of the fourth diagram. The sixth diagram is a vertical axis direction perpendicular to the rail in the embodiment of the present invention. The cross-sectional view of the movable block and the strip is cut off on one side. The seventh figure is the II-II cross-sectional view of the sixth figure. The eighth figure shows the curve of the test result of the vibration test apparatus according to the embodiment of the present invention. Fig. 9 is a graph showing the test knot of the vibration test apparatus of the comparative example. [Explanation of main component symbols] 1 Test apparatus 100 Apparatus body 110 Skeleton 111 Table portion 112 Top 120 Servo motor 123 Coupler 29 200946891

130 movable table 132 movable table 140 dynamometer 150 displacement sensor 160 upper stage 161 through hole 171 guide rod 172 servo motor 173 nut 174 key joint 175 feed screw 181 lower adapter 182 upper adapter 200 servo amplifier 300 control unit 400 linear converter 410 housing 411 bottom plate 411a opening 411b flange portion 412 top plate 412a opening portion 412b opening portion 413a opening 413L left side plate 30 200946891

413R right side plate 414B inner side plate 414F front side plate 415 rib 416 cover 420 input shaft 421 male thread portion 421a mountain 421b valley 421c thread side surface 421d thread side surface 422 step portion 423 buckle 424 step portion 425 male thread portion 430L roller unit 430R roller unit 431 upper roller 431a shaft portion 431b roller portion 431c cylindrical roller bearing 432 lower roller 432a shaft portion 432b roller portion 432c cylindrical roller bearing 31 200946891

433 connecting plate 433a opening 433b slotted groove 433M upper surface 433b2 lower 433c through hole 433d through hole 433e sub L 434 movable block 434a groove 434a' groove 434b ball 434c avoiding road 434d U-shaped path 435 rail 435a, 435a' groove 436 positioning Screw 437a First bolt 437b Second bolt 438 Rod joint block 438a Through hole 438b Slot groove 438c Through hole 438d Through hole 441 Upper limit detection sensor 32 200946891

442 lower limit detection sensor 451 upper bearing 452 lower bearing 453 cover plate 453a circumferential groove 454 bearing stop 455 bearing support member 455a flange portion 455b circumferential groove 455c through hole 455d step portion 456 flange 457 oil encapsulation member 457a groove 458 oil seal 461 linear connecting rod 461a lower end 462 bushing 462a groove 463 bushing mounting part 463a step 464 cover 464a, 464b groove W workpiece 33

Claims (1)

200946891 VII. Patent application scope: h A vibration test device with a 僙-translating converter that converts the rotational motion of the rotating shaft of the feeding motor into a linear motion and the movable device equipped with the object to be tested The linear motion converter is characterized in that: the linear motion converter includes: a port-translating converter frame fixed to the a-frame of the vibration testing device, and an input shaft that is rotatably supported by the linear motion a lunar frame coupled to the rotating shaft of the servo motor; and a minute portion; formed on at least one surface of the outer circumference; the roller 'having a cylindrical roller unit abutting the thread side of the square thread a rotating shaft is implanted, and the circle of the body accommodated between the valleys of the square threads is supported by a substantially complete roller so that the roller can freely rotate the w-aperture bearing to the front row, and is fixed to the aforementioned linear transformation. The sub-unit of the f is along the axis of the square thread = two to make the movement; and the door is free to slide straight into the sliding output shaft 'directly or indirectly ❹ the upper end of the output shaft supports the aforementioned movable work ^" The roller unit, wherein the tweezers along with the aforementioned input wheel: _ = combined along the square thread 'the same as the aforementioned square thread 70 along the aforementioned straight line to move ', 2, 4, the aforementioned rolling The straight forward movement causes the front/speaking wheel (4) to move up and down with these moving tables. 34 200946891 2. For application: the vibration test device of the range ι is straight—having a plurality of the aforementioned rollers; the levy is: clamping; the pair of rollers among the several rollers are configured to be 3· The vibration test device of the first item is a special thread, and the square thread is a plurality of threads. /, is characterized by The vibration testing device of the invention is characterized in that the mountain of the grain has the aforementioned pair of rollers toward the square snail 5', and the vibration testing device of the fourth item of the patent scope, the opening = roller unit It has the two pairs of rollers formed in the above, and it is ridiculous! The massing section is a vibration reducing apparatus by adjusting the interval of the aforementioned groove, and the interval of 6 screw:;::: and the pair of rollers to the aforementioned side. The reinforcing means includes: a first through hole that is perforated from one end of the roller unit toward the opening groove; and a θ 苐 a through hole 'perforated from one end of the roller unit toward the grooved groove, a female ridge is formed on the inner circumference; the female screw hole extends toward the other end of the roller unit toward the first through hole via the groove, and the thread is passed through the through hole. Screwed into the female threaded hole; and 35 200946891 second bolt, screwed into the second through hole; wherein the head of the first bolt presses one end of the roller unit to reduce the width of the groove The upper load is applied to the roller unit, and the front end portion of the second bolt presses the groove to apply a load in a direction in which the width of the groove is increased to the roller unit. 7. The vibration test apparatus according to claim 1, wherein the linear motion converter frame has a casing body that houses the square thread, the ® roller unit, and the rail; the casing body is filled with lubrication. oil. 8. The vibration test apparatus according to claim 6, wherein: the outer casing body has: a bottom plate formed with an opening for mounting a bearing for rotatably supporting the input shaft; and a top plate Forming an opening for mounting a bearing for slidably supporting the output shaft; © between the opening of the bottom plate and the input shaft, and between the opening of the top plate and the output shaft There is an oil seal to prevent oil from leaking out. 9. The vibration testing device according to claim 1, wherein the roller unit has: a movable block that is engageable with the bar to move along the bar; the movable block has: a recess, surrounding The groove is formed in the concave portion along the moving direction of the movable block; 36 200946891 avoiding the road, formed in the movable block, and connecting the two ends of the groove in the moving direction to form a closed circuit with the groove And a plurality of balls circulate in the closed circuit; the balls abut against the bar when located in the groove. 10. The vibration test apparatus according to claim 9, wherein the movable block is formed with four closed circuits, and is disposed in each of the four closed circuits. The balls have a contact angle of about ±45° with respect to the radial direction of the movable block, and the balls respectively disposed in the other two closed-loop grooves have a relative radial direction with respect to the movable block. 45° contact angle. 37