JP7202000B2 - Device to be tested and testing machine - Google Patents

Description

The present invention relates to a device for supporting a device under test and a testing machine including the same.

In the dynamic balance tester disclosed in Patent Document 1 below, a collet chuck having an engagement/disengagement mechanism is set on a hub portion of a specimen while being inserted into a taper portion of a spindle. When the collet chuck is moved relative to the tapered portion while the draw bar is engaged with the engaging/disengaging mechanism at the engaging position, the diameter of the collet chuck expands to grip the specimen. When a robot arm, which exists separately from the dynamic balance tester, moves the engagement/disengagement mechanism to the release position, the engagement/disengagement mechanism no longer engages with the drawbar. It can be attached to and detached from the main shaft for

JP-A-2000-39376

In the dynamic balance tester of Patent Document 1, it is necessary to operate an external device such as a robot arm to engage and disengage the collet chuck engagement and disengagement mechanism and the draw bar each time the setup is changed. Therefore, in the changeover, time loss occurs due to the operation of the external device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for supporting a device to be tested and a testing machine including the same, which can reduce time loss in setup changes.

The present invention has a connecting shaft (22) and a tapered inner peripheral surface (21C) surrounding the connecting shaft, and is expandable and contractible, and the connecting shaft is configured so as to be relatively immovable in the axial direction (K) of the connecting shaft. A replacement set (20) having a collet (21) connected to a shaft and fitted into a reference hole (4A) of a device under test (4), and a plurality of types of exchange sets (20) according to the size of the collet, and a testing machine ( 1) a base unit (30) fixed to a spindle (7) rotatably driven about a longitudinal axis (J) and to which said replacement set is attached and detached, said base unit being a table on which a device to be tested is placed; (32D) is inserted between the inner peripheral surface of the collet in which the axial direction is vertical and the connecting shaft, and has a tapered shape whose diameter decreases upward along the inner peripheral surface. An upper cylinder (36) having an outer peripheral surface (36A), a lower cylinder (35) surrounding a portion of the connecting shaft protruding downward from the upper cylinder, and an elevating mechanism for raising and lowering the lower cylinder with respect to the upper cylinder. a portion (38) for connecting the lower cylinder and the connecting shaft as the lower cylinder descends, and disconnecting the lower cylinder and the connecting shaft as the lower cylinder ascends; A device under test (6) further comprising a decoupling mechanism (42). Note that alphanumeric characters in parentheses represent corresponding components and the like in embodiments described later. The same shall apply hereinafter in this section.

According to this configuration, in the device under test, when the upper cylinder is inserted between the collet and the connecting shaft, the part of the connecting shaft protruding downward from the upper cylinder is surrounded by the lower cylinder. When the lifting section lowers the lower cylinder in this state, the connection release mechanism connects the connecting shaft (that is, the exchange set including the connecting shaft and the collet) and the lower cylinder (that is, the base unit). With the collet fitted in the reference hole of the device under test placed on the table, when the elevating unit further lowers the lower cylinder, the collet descends relative to the upper cylinder to expand its diameter and press-fit into the reference hole. Therefore, the device under test is strongly held by the collet. Conversely, when the elevating unit raises the lower cylinder, the collet contracts in diameter and is no longer press-fitted into the reference hole. When the lower cylinder is further raised after that, the connection release mechanism releases the connection between the exchange set and the base unit. be. In this manner, the connection and disconnection of the replacement set and the base unit can be accomplished within the device for supporting the device under test without operating an external device. Therefore, it is possible to reduce the time loss in the setup change for exchanging the exchange set.

Further, in the present invention, the connection release mechanism includes a through hole (35C) penetrating the lower cylinder in the radial direction (R), and a moving body fitted in the through hole so as to be movable in the radial direction. (39), a recessed portion (22B) provided on the outer peripheral surface of the connecting shaft, an upper inner peripheral surface (37A), and an upper inner peripheral surface (37A) disposed below the upper inner peripheral surface and above the upper inner peripheral surface. A sleeve that surrounds the lower cylinder and has a lower inner peripheral surface (37B) with a smaller diameter and a tapered surface (37C) that connects the upper inner peripheral surface and the lower inner peripheral surface and has a smaller diameter downward. (37), wherein the sleeve moves the movable body inward in the radial direction by means of the tapered surface to fit in the concave portion as the lower cylinder descends, and as the lower cylinder ascends It is characterized in that the moving body is moved outward in the radial direction by the tapered surface and separated from the concave portion.

According to this configuration, when the lower cylinder surrounded by the sleeve descends, the moving body fitted in the through hole of the lower cylinder moves radially inward along the tapered surface of the sleeve, thereby moving the concave portion of the connecting shaft. The lower cylinder and the connecting shaft are connected via the moving body. Conversely, when the lower cylinder rises, the moving body moves radially outward along the tapered surface of the sleeve and is separated from the concave portion of the connecting shaft, thereby releasing the connection between the lower cylinder and the connecting shaft. .

Further, the present invention is a testing machine (1) including a spindle (7) rotationally driven around a vertical axis (J) and the device under test (6) fixed to the spindle. According to this configuration, the test apparatus can reduce the time loss in the setup change.

FIG. 1 is an overall view of a testing machine according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of a replacement set included in the support device of the testing machine. FIG. 3 is a sectional view of a replacement set different in type from the replacement set of FIG. FIG. 4 is a plan view of collets that constitute the replacement set. 5 is a cross-sectional view taken along the line AA in FIG. 4. FIG. FIG. 6 is a vertical cross-sectional view of the support device. 7 is a cross-sectional view taken along the line BB in FIG. 6. FIG. FIG. 8 is a vertical cross-sectional view of the support device. 9 is a cross-sectional view taken along line CC of FIG. 8. FIG. FIG. 10 is a vertical cross-sectional view of the main part of the supporting device.

Embodiments of the present invention will be described in detail below. FIG. 1 is an overall view of a testing machine 1 according to one embodiment of the invention. A testing machine 1 is a device for performing a uniformity test and a dynamic balance test on a test object 4 such as a rotor or a wheel with a tire. The testing machine 1 includes a load device (not shown) that applies a lateral ground load to the test object 4 during the uniformity test, and a measuring device 5 that measures the uniformity and dynamic imbalance of the test object 4. include.

The measuring device 5 includes a device under test support device 6 (hereinafter referred to as “support device 6”) that supports the device under test 4 in a lying state, and a spindle 7 that extends vertically. The support device 6 is fixed to the upper end 7A of the spindle 7. As shown in FIG. A pulley 8 is fixed to a portion of the spindle 7 below the upper end portion 7A.

The measuring device 5 includes a base 10 fixed to the machine base 9, a holding frame 11 fixed to the upper end of the base 10 and holding the spindle 7 so as to vibrate, and a driving device 12 fixed to the machine base 9. and further including The driving device 12 includes a motor 13 , a pulley 15 is fixed to an output shaft 14 projecting upward from the driving device 12 in the motor 13 , and the pulley 15 and the pulley 8 of the spindle 7 are connected by a belt 16 . ing. When the motor 13 is driven to rotate the output shaft 14, the rotation of the output shaft 14 is transmitted to the spindle 7 via the belt 16, so that the spindle 7 is rotationally driven around the vertical axis J passing through its center. As a result, the device under test 4 fixed to the spindle 7 by the support device 6 rotates integrally with the support device 6 and the spindle 7 at a predetermined rotational speed.

When performing the dynamic balance test, the device under test 4 is driven and rotated at a predetermined speed by the motor 13 . A dynamic balance test is performed by detecting the vibration of the device under test 4 in this state by the measuring device 5 .

Next, the support device 6 will be described in detail. FIG. 2 is a cross-sectional view of the replacement set 20 included in the support device 6. As shown in FIG. The replacement set 20 is a component that is replaced when the testing machine 1 is changed in accordance with the type change of the device under test 4 , and has a collet 21 , a connecting shaft 22 and a grip portion 23 . In addition, in each figure after FIG. 2, the cross section of the connecting shaft 22 is not illustrated for convenience of explanation.

The collet 21 has a cylindrical shape and is used in the support device 6 in a state in which the direction in which the axis H extends (hereinafter referred to as "axial direction K") is vertical. The collet 21 integrally has an upper portion 21A and a lower portion 21B arranged below the upper portion 21A. The outer peripheral surface of the collet 21 has a smaller diameter in a region between the upper portion 21A and the lower portion 21B and in the upper end portion above the upper portion 21A. There are a plurality of types of the replacement set 20 according to the corresponding device under test 4, and each type of the replacement set 20 differs in at least the outer diameter size of the upper portion 21A of the collet 21 (see FIGS. 2 and 3). ). The exchange set 20 removed from the support device 6 is stored in a storage location near the testing machine 1. FIG. The internal space of the collet 21 penetrates the upper portion 21A and the lower portion 21B and widens downward. Therefore, the inner peripheral surface 21C that defines the inner space of the collet 21 has a tapered shape with a smaller diameter toward the upper side. An annular groove 21D extending in the circumferential direction P around the axis H is formed in the upper end portion of the inner peripheral surface 21C.

The connecting shaft 22 has a cylindrical shape and is arranged coaxially with the collet 21 while being surrounded by the inner peripheral surface 21C of the collet 21 . A flange portion 22</b>A projecting radially outward is provided at the upper end of the connecting shaft 22 , and the lower half of the connecting shaft 22 protrudes downward from the inner space of the collet 21 . The flange portion 22A is fitted in an annular groove 21D of the inner peripheral surface 21C of the collet 21. As shown in FIG. Thereby, the collet 21 and the connecting shaft 22 are connected in the axial direction K so as not to move relative to each other. The connecting shaft 22 may be movable relative to the collet 21 in the circumferential direction P, or may be immovable relative to the collet 21 . An annular recess 22B extending in the circumferential direction P is provided at the lower end of the outer peripheral surface of the lower half of the connecting shaft 22 . The connecting shaft 22 is provided with a stopper 22C projecting downward from its lower end. An example of the stopper 22C is a bolt attached to the connecting shaft 22 from below.

The gripping portion 23 includes a lower disk portion 23A that is connected to the upper end of the connecting shaft 22 and closes the inner space of the collet 21 from above, a shaft portion 23B that projects upward from the center of the lower disk portion 23A, and an upper end of the shaft portion 23B. and an upper disk portion 23C connected to the upper disk portion 23C.

FIG. 4 is a plan view of the collet 21. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4. FIG. A plurality of split grooves 21E extending vertically along the axial direction K are formed in the collet 21 . The dividing grooves 21E are slits, and there are 12 of them in this embodiment. Six of the twelve split grooves 21E are arranged at equal intervals in the circumferential direction P of the collet 21, and extend from the upper end to just before the lower end of the collet 21 to cut the collet 21 in the radial direction. is. The remaining six split grooves 21E are arranged at equal intervals in the circumferential direction P, and are lower split grooves 21EB extending from the lower end to just before the upper end of the collet 21 and cutting the collet 21 in the radial direction. The upper split grooves 21EA and the lower split grooves 21EB are alternately arranged in the circumferential direction P. The narrowing of each split groove 21E causes the diameter of the entire collet 21 to decrease, and the widening of each split groove 21E causes the diameter of the entire collet 21 to expand.

FIG. 6 is a longitudinal sectional view of the entire support device 6. As shown in FIG. Of the plurality of parts that constitute the support device 6, all the parts other than the sealing member that is blacked out and shown in each figure after FIG. 6 are made of metal. 6 and subsequent figures, in addition to the connecting shaft 22, bolts, moving bodies 39, and the like, which will be described later, are not shown in cross section. The support device 6 includes the replacement set 20 described above and a base unit 30 fixed to the upper end portion 7A of the spindle 7 to which the replacement set 20 is attached and detached. The base unit 30 includes a lower housing 31 and an upper housing 32, a lower piston 33 and an upper piston 34 housed in the lower housing 31, a lower cylinder 35 fixed to the upper piston 34, and an upper housing. It includes an upper tube 36 and a sleeve 37 housed within 32 .

The lower housing 31 includes a disk-shaped bottom wall 31A fixed from above to the upper end portion 7A of the spindle 7 with bolts B1, a cylindrical peripheral wall 31B fixed from above to the bottom wall 31A with bolts B2, and bolts B3. and an annular ceiling wall 31C fixed from above to the peripheral wall 31B by The lower housing 31 is fixed in its vertical position by being fixed to the spindle 7 . The lower housing 31 further includes a disk-shaped partition wall 31D integrally provided in the middle of the peripheral wall 31B in the vertical direction. The bottom wall 31A, the peripheral wall 31B, the top wall 31C and the partition wall 31D are arranged coaxially with the longitudinal axis J of the spindle 7. As shown in FIG. The internal space of the lower housing 31 is partitioned into a lower space S1 between the bottom wall 31A and the partition wall 31D and an upper space S2 between the top wall 31C and the partition wall 31D.

The upper housing 32 has an annular bottom wall 32A fixed from above to the ceiling wall 31C of the lower housing 31 with bolts B4, a cylindrical lower peripheral wall 32B fixed from above to the bottom wall 32A with bolts B5, and bolts B5. and a cylindrical upper peripheral wall 32C secured from above to the lower peripheral wall 32B by B6. The upper housing 32 further includes an annular table 32D fixed from above to the upper peripheral wall 32C by bolts B7. The upper housing 32 is fixed in its vertical position by being fixed to the spindle 7 via the lower housing 31 .

The lower piston 33 integrally comprises a disk-shaped main body portion 33A having an outer diameter approximately the same as the inner diameter of the peripheral wall 31B of the lower housing 31, and a columnar projecting portion 33B projecting upward from the center of the main body portion 33A. have. The body portion 33A is arranged in the lower space S1. The lower piston 33 moves up and down between an upper limit position (see FIG. 6) where the body portion 33A contacts the partition wall 31D from below and a lower limit position (not shown) where the body portion 33A contacts the bottom wall 31A from above. It is possible.

The upper piston 34 has an annular shape with an outer diameter substantially equal to the inner diameter of the peripheral wall 31B of the lower housing 31, and is arranged in the upper space S2. The upper piston 34 can move up and down between an upper limit position (see FIG. 6) that contacts the top wall 31C from below and a lower limit position (not shown) that contacts the partition wall 31D from above. A projecting portion 33B of the lower piston 33 is inserted through the center hole of the upper piston 34 from below. An upper end portion of the projecting portion 33B protrudes upward from the upper piston 34 . A stepped portion 33C provided in the middle of the projecting portion 33B is engaged with the upper piston 34 from below. As a result, the upper piston 34 and the lower piston 33 can move up and down together to their respective upper limit and lower limit positions.

The lower cylinder 35 integrally has an annular base portion 35A fixed from above to the upper piston 34 by bolts B8, and a circular pipe portion 35B protruding upward from the inner peripheral portion of the base portion 35A. The upper piston 34 and the lower piston 33 function as an elevating section 38 that elevates the lower cylinder 35 . A plurality of (for example, six) through-holes 35C penetrating through the pipe portion 35B in the radial direction R are formed in the pipe portion 35B. These through holes 35C are arranged circumferentially around the vertical axis J at regular intervals. One moving body 39 is fitted in each through hole 35C. An example of the moving body 39 is a ball. Each moving body 39 can move in the radial direction R while being unable to come off the through hole 35C.

The upper cylinder 36 has a hollow truncated cone shape extending vertically, and an outer peripheral surface 36A thereof is formed in a tapered shape with a smaller diameter toward the upper side. The upper cylinder 36 is arranged coaxially with the vertical axis J. As shown in FIG. The upper portion of the outer peripheral surface 36A protrudes above the table 32D of the upper housing 32. As shown in FIG. A lower end portion of the upper cylinder 36 is formed in a flange shape projecting outward in the radial direction R, and is fixed from above to the inner peripheral portion of the lower peripheral wall 32B of the upper housing 32 with bolts B9. Therefore, the vertical position of the upper tube 36 is fixed.

The sleeve 37 is formed in a cylindrical shape and surrounds the tubular portion 35B of the lower cylinder 35 while being surrounded by the lower peripheral wall 32B of the upper housing 32 . The sleeve 37 is fixed in its vertical position by being sandwiched between the upper end of the inner peripheral portion of the lower peripheral wall 32B and the bottom wall 32A of the upper housing 32 . The inner peripheral surface of the sleeve 37 includes an upper inner peripheral surface 37A, a lower inner peripheral surface 37B arranged below the upper inner peripheral surface 37A and having a smaller diameter than the upper inner peripheral surface 37A, and an upper inner peripheral surface 37A. It has a tapered surface 37C connecting with the lower inner peripheral surface 37B and having a smaller diameter toward the lower side.

The support device 6 includes a channel member 40 arranged in the lower space S<b>1 of the lower housing 31 . The flow path member 40 includes a disc-shaped base portion 40A coaxially arranged on the bottom wall 31A of the lower housing 31 and fixed to the bottom wall 31A by bolts B10, and projecting upward from the center of the base portion 40A. It integrally includes a tubular insertion portion 40B that is inserted through the center hole of the lower piston 33 from below. The support device 6 includes a first flow passage Q1 extending vertically through the bottom wall 31A and then extending obliquely upward in the base portion 40A and connected to the lower space S1 from below; Then, the second flow path Q2 extends obliquely upward in the base portion 40A, sequentially passes through the insertion portion 40B and the projecting portion 33B of the lower piston 33, and then connects to the upper regions of the lower space S1 and the upper space S2. and are provided. The support device 6 is also provided with a third channel Q3 that is formed in the partition wall 31D of the lower housing 31 and communicates the lower region of the upper space S2 with the outside.

A rotary joint 41 connected to an air hose (not shown) is provided at the lower end of the spindle 7 of the testing machine 1 in relation to the first flow path Q1 and the second flow path Q2 (see FIG. 1). ). The rotary joint 41 is an air supply unit that supplies air (compressed air) or stops the supply of air under the control of a control unit (not shown) provided in the testing machine 1 . The spindle 7 is provided with a first flow path 7B and a second flow path 7C extending upward from the rotary joint 41 and connected to the first flow path Q1 and the second flow path Q2, respectively. The arrangement of the first flow path 7B and the second flow path 7C can be arbitrarily changed, and these flow paths may be provided inside the spindle 7 or outside the spindle 7 .

As shown in FIG. 6, in the base unit 30 in the standby state, air is supplied to the first flow path Q1, while air is discharged from the second flow path Q2. At this time, the lower piston 33 is at the upper limit position by being pushed up by the air supplied from the first flow path Q1 to the lower space S1, and the upper piston 34 is at the upper limit position by being pushed up by the stepped portion 33C of the lower piston 33. in position. Each moving body 39 fitted in the through hole 35C of the lower cylinder 35 fixed to the upper piston 34 is located near the boundary between the upper inner peripheral surface 37A of the sleeve 37 and the tapered surface 37C in the vertical direction. 35 outside the inner peripheral surface of the pipe portion 35B in the radial direction R.

Next, attachment/detachment of the replacement set 20 to/from the base unit 30 will be described. As a mounting procedure, first, the replacement set 20 is transported manually by an operator or automatically by a robot (not shown) to a standby position above the base unit 30 while the upper disc portion 23C of the grip portion 23 is gripped. After that, it descends and is provisionally set on the base unit 30 in the standby state as shown in FIG. At this time, the stopper 22C of the connecting shaft 22 comes into contact with the upper end of the projecting portion 33B of the lower piston 33, thereby stopping the descent of the replacement set 20. As shown in FIG.

The temporarily set replacement set 20 is arranged coaxially with the longitudinal axis J of the spindle 7 . Specifically, in the replacement set 20, the upper cylinder 36 is inserted from below between the inner peripheral surface 21C of the collet 21 and the connecting shaft 22 in a state in which the axial direction K is vertical in the replacement set 20. An outer peripheral surface 36A of the cylinder 36 follows the inner peripheral surface 21C of the collet 21 . Collet 21 is surrounded by table 32D such that at least the upper end of upper portion 21A is positioned above table 32D. A lower portion 21B of the collet 21 is surrounded by an upper peripheral wall 32C. A portion of the connecting shaft 22 lower than the upper half inserted into the upper cylinder 36 protrudes downward from the upper cylinder 36 and is surrounded by the lower cylinder 35 . The recessed portion 22B of the connecting shaft 22 is slightly shifted downward from each moving body 39 in the through hole 35C of the lower cylinder 35 . At this time, each moving body 39 is not fitted in the concave portion 22B (see also FIG. 7, which is a cross-sectional view taken along line BB in FIG. 6).

Next, air is supplied to the second flow path Q2 while the supply of air to the first flow path Q1 is stopped. Then, the air existing in the area below the lower piston 33 in the lower space S1 is discharged through the first flow path Q1, and the air existing in the area below the upper piston 34 in the upper space S2 is discharged. , and the third flow path Q3. At the same time, the lower piston 33 and the upper piston 34 are pushed down by the air supplied from the second flow path Q2 to the upper regions of the lower space S1 and the upper space S2. Then, as shown in FIG. 8, the lower cylinder 35 fixed to the upper piston 34 descends with respect to the connecting shaft 22, the upper cylinder 36 and the sleeve 37 of the replacement set 20. As shown in FIG. As a result, each moving body 39 in the through hole 35C of the lower cylinder 35 is moved inward in the radial direction R by the tapered surface 37C of the sleeve 37. As shown in FIG. Also, the through hole 35C of the lower cylinder 35 coincides with the recessed portion 22B of the connecting shaft 22 in the vertical direction. Then, each moving body 39 is fitted into the recess 22B and hooked to the lower corner 22D of the recess 22B, so that the connecting shaft 22 (that is, the entire exchange set 20) and the lower cylinder 35 are connected via each moving body 39. They are connected and can be lowered together (see also FIG. 9, which is a cross-sectional view taken along line CC of FIG. 8).

By the above, mounting of the exchange set 20 to the base unit 30 is completed. At this time, the lower piston 33 and the upper piston 34 are positioned slightly higher than the positions shown in FIG. The upper end of the projecting portion 33B of the lower piston 33 is separated downward from the stopper 22C of the connecting shaft 22 by the play of the moving body 39 in the recess 22B.

When a test is performed by the tester 1, the upper portion 21A of the collet 21 is fitted into the central reference hole 4A of the device under test 4. As shown in FIG. A peripheral portion of the reference hole 4A in the device under test 4 is placed on a table 32D. In this state, air is supplied to the second flow path Q2, and the lower piston 33 and the upper piston 34 are pushed down by the air supplied from the second flow path Q2. At that time, the lower cylinder 35 fixed to the upper piston 34 is further lowered together with the replacement set 20 . Therefore, the collet 21 of the replacement set 20 moves downward relative to the outer peripheral surface 36A of the upper cylinder 36 . As a result, the diameter of the collet 21 is expanded by widening the split grooves 21E, and the upper portion 21A of the collet 21 is press-fitted into the reference hole 4A. Since the descent of both the upper piston 34 and the lower piston 33 acts on the diameter expansion of the collet 21, the device under test 4 is strongly chucked. FIG. 8 shows a state in which the upper piston 34 and the lower piston 33 stop descending and the device under test 4 is chucked. In this state, for example, when a dynamic balance test is performed, the spindle 7 rotates and the vibration of the device under test 4 at that time is detected.

After the test, air is supplied to the first flow path Q1 while the supply of air to the second flow path Q2 is stopped. The lower piston 33 and the upper piston 34 are then raised together with the replacement set 20 . As a result, the diameter of the collet 21 decreases while rising with respect to the outer peripheral surface 36A of the upper cylinder 36, and the device under test 4 is uncucked. At this time, the collet 21 is forcibly separated from the outer peripheral surface 36A of the upper cylinder 36 by the stopper 22C of the connecting shaft 22 being pushed up by the projecting portion 33B of the lower piston 33 .

The unchucked device under test 4 can be removed. In this state, air is further supplied to the first flow path Q1, and the lower piston 33 and the upper piston 34 are pushed up to their upper limit positions by the air supplied from the first flow path Q1. At this time, as shown in FIG. 6, each moving body 39 in the through hole 35C of the lower cylinder 35, which rises with respect to the upper cylinder 36 together with the upper piston 34, is moved outward in the radial direction R by the tapered surface 37C of the sleeve 37. be moved to As a result, each moving body 39 is removed from the recessed portion 22B of the connecting shaft 22, so that the exchange set 20 having the connecting shaft 22 and the lower cylinder 35 are disconnected. Therefore, if the free exchange set 20 is lifted manually or automatically, the exchange set 20 is separated from the base unit 30 . When a device under test 4 having a different reference hole 4A size is to be tested next, a replacement set 20 having a size matching the reference hole 4A of this device under test 4 is prepared as shown in FIG. is attached to the base unit 30 at . The device under test 4 may be attached and detached while the exchange set 20 that has become free remains attached.

A sleeve having a concave portion 22B of the connecting shaft 22, each through hole 35C of the lower cylinder 35, a moving body 39 that is fitted in each through hole 35C to be fitted into the concave portion 22B or disengaged from the concave portion 22B, and a tapered surface 37C. Reference numeral 37 constitutes a disconnecting mechanism 42 for connecting or disconnecting the lower cylinder 35 and the connecting shaft 22 . In the support device 6, the connection release mechanism 42 in the support device 6 can achieve connection and disconnection between the exchange set 20 and the base unit 30 without operating an external device. Therefore, it is possible to reduce the time loss in the setup change for exchanging the exchange set 20 .

The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims.

For example, in the above-described embodiment, the testing machine 1 is a composite testing device that performs both the uniformity test and the dynamic balance test, but it may be able to perform at least one of the uniformity test and the dynamic balance test.

The elevating unit 38 for elevating the lower cylinder 35 is not limited to the configuration using air as described above, and may be configured using the driving force of a motor, for example.

Reference Signs List 1 testing machine 4 device under test 4A reference hole 6 support device for device under test 7 spindle 20 exchange set 21 collet 21C inner peripheral surface 22 connecting shaft 22B concave portion 30 base unit 32D table 35 lower cylinder 35C through hole 36 upper cylinder 36A outer peripheral surface 37 Sleeve 37A Upper inner peripheral surface 37B Lower inner peripheral surface 37C Taper surface 38 Elevator 39 Moving body 42 Disconnection mechanism J Vertical axis K Axial direction R Radial direction

Claims (3)

It has a connecting shaft and a tapered inner peripheral surface surrounding the connecting shaft, is expandable and contractible, is connected to the connecting shaft so as not to move relatively in the axial direction of the connecting shaft, and is fitted into the reference hole of the test object. a replacement set having a plurality of types of collets according to the size of the collet;
a base unit fixed to a spindle rotationally driven about a longitudinal axis in a testing machine and to which the replacement set is attached and detached;
The base unit is
a table on which the device under test is placed;
It is inserted between the inner peripheral surface of the collet in which the axial direction is vertical and the connecting shaft, and has a tapered outer peripheral surface whose diameter decreases upward along the inner peripheral surface. cylinder and
a lower cylinder surrounding a portion of the connecting shaft protruding downward from the upper cylinder;
an elevating unit for elevating the lower cylinder with respect to the upper cylinder,
Further comprising a decoupling mechanism that connects the lower cylinder and the connecting shaft as the lower cylinder descends and disconnects the lower cylinder and the connecting shaft as the lower cylinder ascends. body support device. The decoupling mechanism is
a through hole radially penetrating the lower cylinder;
a moving body fitted in the through hole so as to be movable in the radial direction;
a concave portion provided on the outer peripheral surface of the connecting shaft;
an upper inner peripheral surface, a lower inner peripheral surface arranged below the upper inner peripheral surface and having a smaller diameter than the upper inner peripheral surface, and a lower inner peripheral surface connecting the upper inner peripheral surface and the lower inner peripheral surface. a sleeve that surrounds the lower cylinder and has a tapered surface that decreases in diameter toward the side;
The sleeve moves the movable body inward in the radial direction by means of the tapered surface as the lower cylinder descends and is fitted into the recess, and moves the movable body by means of the tapered surface as the lower cylinder rises. 2. The apparatus for supporting a device under test according to claim 1, wherein the device is moved outward in the radial direction to separate from the recess. a spindle driven in rotation about a longitudinal axis;
A testing machine comprising the device under test according to claim 1 or 2 fixed to said spindle.

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