Piezoelectric actuator performance testing device

Abstract

The utility model relates to a performance testing device for a piezoelectric actuator, which belongs to the technical field of detection equipment and comprises a base plate, a guide rod, a top plate, a pressure applying servo electric cylinder, a pressure applying platform, a linear bearing, a pressure sensor and a support disc, an embedded groove is arranged in the middle of the top of the support disc, and an annular electromagnetic chuck is fixed in the embedded groove. A plurality of embedded chucks are arranged above the supporting disc, a placement bayonet is formed in the top of each embedded chuck, a detection hole is formed in the bottom of each placement bayonet, a displacement sensor is arranged in each detection hole, an upper damping plate and a lower damping plate are fixed to the bottom of the base plate, and a middle flexible layer is arranged between the lower damping plate and the upper damping plate. According to the utility model, the installation and positioning of the piezoelectric actuator can be rapidly completed, the device is suitable for piezoelectric actuators of various sizes, the vibration isolation efficiency of the bottom of the base plate is improved through a rigid-flexible-rigid composite structure, and the external vibration is not easy to interfere with the test.

Description

TECHNICAL FIELD

[0001] The utility model relates to a piezoelectric driver performance testing device and belongs to the technical field of detection equipment. BACKGROUND

[0002] The piezoelectric driver is a kind of device for generating displacement or force using piezoelectric effect, which can be used to drive object movement or adjust the position of object. It is commonly used in positioning control of precision instruments and equipment. The piezoelectric driver needs to be tested before use, and the maximum displacement of the piezoelectric driver needs to be known to provide accurate numerical support for subsequent system design. The current testing device is relatively troublesome to replace different piezoelectric drivers, and the anti-vibration effect of the base is not good, and external vibration can easily interfere with the test. SUMMARY

[0003] The utility model provides a piezoelectric driver performance testing device, solves the problem of the above background technology.

[0004] The utility model relates to a piezoelectric driver performance testing device, including base plate, the top of base plate is fixed with guide rod, the top of guide rod is fixed with top plate, the middle part of top plate is equipped with pressure servo electric cylinder, the bottom of pressure servo electric cylinder is fixed with pressure platform, the straight line bearing of being fixed on guide rod is fixed on pressure platform, the middle part of the bottom of pressure platform is fixed with pressure sensor, the base plate below pressure sensor is fixed with support disc, the middle part of the top of support disc is equipped with embedding groove, the embedding groove is fixed with annular electromagnetic chuck, the top of support disc is equipped with embedding chuck, the bottom of embedding chuck is equipped with embedding boss that extends into embedding groove, the bottom of embedding boss is fixed with annular iron sheet, embedding chuck is equipped with a plurality of, and the top of each embedding chuck is equipped with placing bayonet, the size of placing bayonet of a plurality of embedding chucks is not equal, the bottom of placing bayonet is equipped with detection hole, detection hole extends to the bottom of base plate through support disc, and displacement sensor is equipped in detection hole, the bottom of base plate is fixed with upper damping plate, the lower of upper damping plate is equipped with lower damping plate, and the middle flexible layer is equipped between lower damping plate and upper damping plate.

[0005] As a kind of preferred, the middle part of the bottom of base plate is equipped with avoiding open slot, the bottom of detection hole extends to the top of avoiding open slot, the installation and maintenance of displacement sensor are facilitated.

[0006] As a kind of preferred, the bottom of detection hole is equipped with stepped positioning table, the top of displacement sensor is positioned on stepped positioning table, fixed flange is equipped on the outer side wall of displacement sensor, fixed flange is fixed in the top of avoiding open slot by bolt, and displacement sensor is conveniently positioned and fixed.

[0007] As a kind of preferred, lower shock-absorbing plate, upper shock-absorbing plate and the middle part of intermediate flexible layer are provided with the corresponding avoiding slot to the avoiding opening slot, the installation and maintenance of displacement sensor can be facilitated.

[0008] As a kind of preferred, the inside and outside exposed part of intermediate flexible layer is provided with sealing glue, prevent dust, water vapor from invading and affecting bonding performance, the lower shock-absorbing plate and the upper shock-absorbing plate corresponding to the sealing glue are provided with the anti-drop circular arc slot greater than semicircle, better prevent sealing glue from falling off.

[0009] As a kind of preferred, the bottom of upper shock-absorbing plate is uniformly fixed with multiple support screws, the lower end of support screw passes through intermediate flexible layer and lower shock-absorbing plate and is connected with limiting nut, so that the connection between upper shock-absorbing plate and lower shock-absorbing plate is more stable, the lower shock-absorbing plate outside limiting nut is provided with mounting groove, the outside of support screw is provided with elastic sleeve, rigid contact is avoided to transmit vibration.

[0010] As a kind of preferred, the lower part of elastic sleeve is provided with damping rubber sleeve, damping spring is covered in damping rubber sleeve, rigid contact is avoided to transmit vibration, and damping effect is improved.

[0011] As a kind of preferred, the lower end of damping spring is provided with protective pad, the top of protective pad and the top of mounting groove are provided with positioning groove, the top and bottom of damping rubber sleeve are provided with positioning boss, damping rubber sleeve can be quickly positioned.

[0012] The utility model discloses the following beneficial effects:

[0013] The base plate is provided with a support disc, the support disc is provided with an annular electromagnetic chuck, a plurality of matched embedded chucks with different sizes for placing sockets suitable for piezoelectric drivers of different sizes can be attracted by suction, so that the installation and positioning of the piezoelectric driver can be quickly completed, a plurality of sizes of piezoelectric drivers are suitable, and the bottom of the base plate is improved in vibration isolation efficiency by a "rigid-flexible-rigid" composite structure, external vibration is not easy to interfere with testing. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of embodiments or prior art. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating creative labor.

[0015] The structure, proportion, size and the like disclosed in the specification are merely used to cooperate with the content disclosed in the specification, for the understanding and reading of those skilled in the art, and do not have technical substantive significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0016] Figure 1 It is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a front view structural schematic diagram of the utility model; Figure 1

[0018] Figure 3 It is an enlarged structural schematic diagram of A in the utility model; Figure 2

[0019] Figure 4 It is an enlarged structural schematic diagram of B in the utility model; Figure 2

[0020] In the figure: 1, pressure servo electric cylinder; 2, top plate; 3, guide rod; 4, pressure platform; 5, linear bearing; 6, pressure sensor; 7, embedded chuck; 8, support disc; 9, base plate; 10, lower damping plate; 11, upper damping plate; 12, displacement sensor; 13, annular electromagnetic chuck; 14, detection hole; 15, annular iron sheet; 16, placing bayonet; 17, support screw; 18, intermediate flexible layer; 19, elastic sleeve; 20, limit nut; 21, protective pad; 22, damping spring; 23, damping rubber sleeve; 24, anti-dropping arc clamping groove; 25, sealing glue. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Embodiment 1, as Figures 1 to 4 ​​​As shown, the utility model is a kind of piezoelectric driver performance testing device, including base plate 9, the top of base plate 9 is fixed with guide rod 3, the top of guide rod 3 is fixed with top plate 2, the middle part of top plate 2 is equipped with pressure servo electric cylinder 1, the bottom of pressure servo electric cylinder 1 is fixed with pressure platform 4, pressure platform 4 is fixed with linear bearing 5 on guide rod 3, the bottom of pressure platform 4 is fixed with pressure sensor 6 in the middle, the bottom of pressure sensor 6 is fixed with support disc 8 on base plate 9, the top of support disc 8 is equipped with embedded recess, embedded recess is fixed with annular electromagnetic chuck 13, the top of support disc 8 is equipped with embedded chuck 7, the bottom of embedded chuck 7 is equipped with embedded boss that extends into embedded recess, the bottom of embedded boss is fixed with annular iron sheet 15, embedded chuck 7 is equipped with multiple, the top of each embedded chuck 7 is equipped with placing bayonet 16, the size of placing bayonet 16 of multiple embedded chuck 7 is not equal, the bottom of placing bayonet 16 is equipped with detection hole 14, detection hole 14 is extended to the bottom of base plate 9 through support disc 8, displacement sensor 12 is equipped in detection hole 14, the bottom of base plate 9 is fixed with upper damping plate 11, the bottom of upper damping plate 11 is equipped with lower damping plate 10, and intermediate flexible layer 18 is equipped between lower damping plate 10 and upper damping plate 11.

[0023] When using, corresponding embedded chuck 7 is selected according to the size of piezoelectric driver, then embedded boss of embedded chuck 7 is inserted into embedded recess, then annular electromagnetic chuck 13 is powered, embedded chuck 7 is magnetically attracted and fixed, then piezoelectric driver to be detected can be inserted into placing bayonet 16, pressure servo electric cylinder 1 is started, drives pressure platform 4 to descend, piezoelectric driver is pressed, the value on pressure sensor 6 is observed, stops applying force when reaching target value, power clamp is used to apply constant test voltage to piezoelectric driver, test pressure applied to piezoelectric driver is changed by pressure servo electric cylinder 1, displacement sensor 12 detects displacement of piezoelectric driver at the same time, until test pressure applied to piezoelectric driver is loaded, and piezoelectric driver is removed after stopping, and detection is finished.

[0024] In the embodiment 2, on the basis of the embodiment 1, the bottom of base plate 9 is equipped with avoiding open slot in the middle, and the bottom of detection hole 14 extends to the top of avoiding open slot.

[0025] The bottom of detection hole 14 is equipped with stepped positioning table, the top of displacement sensor 12 is positioned on stepped positioning table, fixed flange is equipped on the outer side wall of displacement sensor 12, and the top of avoiding open slot is fixed by bolt. Displacement sensor 12 can be fixed on the bottom of detection hole 14 by bolt, and detection hole 14 and displacement sensor 12 can also be screw-connected, so that height position can be conveniently adjusted. Displacement sensor 12 can be laser displacement sensor.

[0026] The middle part of the lower damping plate 10, the upper damping plate 11 and the middle flexible layer 18 is provided with an avoiding slot corresponding to the avoiding opening slot.

[0027] The inner and outer exposed parts of the middle flexible layer 18 are provided with sealing glue 25, and the upper and lower parts of the sealing glue 25 are provided with a half-circle preventing falling arc slot 24 on the upper part of the lower damping plate 10 and the upper part of the upper damping plate 11. After the middle flexible layer 18 is installed, the inner and outer exposed parts of the middle flexible layer 18 are marked with sealing glue 25, and the upper and lower parts of the sealing glue 25 enter the preventing falling arc slot 24, so that falling is prevented.

[0028] The bottom of the upper damping plate 11 is uniformly provided with a plurality of supporting screw rods 17, the lower end of the supporting screw rod 17 penetrates through the middle flexible layer 18 and the lower damping plate 10 and is connected with a limiting nut 20, the lower damping plate 10 outside the limiting nut 20 is provided with a mounting groove, and the outer side of the supporting screw rod 17 is provided with an elastic sleeve 19. The middle flexible layer 18 is made of viscoelastic damping material, and the upper and lower ends of the middle flexible layer 18 are fixed on the upper damping plate 11 and the lower damping plate 10 respectively through high-elasticity and high-durability silicon rubber adhesive.

[0029] The lower part of the elastic sleeve 19 is provided with a damping rubber sleeve 23, and the damping rubber sleeve 23 is covered with a damping spring 22.

[0030] The lower end of the damping spring 22 is provided with a protective pad 21, the top of the protective pad 21 and the top of the mounting groove are provided with positioning grooves, and the top and bottom of the damping rubber sleeve 23 are provided with positioning bosses. During installation, the supporting screw rod 17 penetrates into the elastic sleeve 19 corresponding to the mounting hole, then enters the mounting groove, then the damping rubber sleeve 23 is sleeved on the supporting screw rod 17, then the protective pad 21 is sleeved, the positioning bosses at the upper and lower ends of the damping rubber sleeve 23 are inserted into the corresponding positioning grooves, and then the limiting nut 20 is screwed.

[0031] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0032] In the description of the present application, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and are not required to be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation of the present application.

Claims

1. A piezoelectric actuator performance testing device, comprising a base plate (9), a guide rod (3) fixed to the top of the base plate (9), a top plate (2) fixed to the top of the guide rod (3), a pressure servo electric cylinder (1) provided in the middle of the top plate (2), a pressure platform (4) fixed to the bottom of the pressure servo electric cylinder (1), and a linear bearing (5) sleeved on the guide rod (3) fixed on the pressure platform (4), characterized in that: A pressure sensor (6) is fixed in the middle of the bottom of the pressure platform (4). A support plate (8) is fixed on the base plate (9) directly below the pressure sensor (6). An embedding groove is provided in the middle of the top of the support plate (8). An annular electromagnetic chuck (13) is fixed in the embedding groove. An embedding clamp (7) is provided above the support plate (8). An embedding boss that extends into the embedding groove is provided at the bottom of the embedding clamp (7). An annular iron piece (15) is fixed at the bottom of the embedding boss. There are multiple embedding clamps (7). Each embedding clamp (7) has a top for placing... The size of the multiple placement slots (16) for the embedded clamps (7) is not equal. The bottom of the placement slot (16) is provided with a detection hole (14). The bottom of the detection hole (14) extends through the support plate (8) to the bottom of the base plate (9). The detection hole (14) is provided with a displacement sensor (12). The bottom of the base plate (9) is fixed with an upper damping plate (11). A lower damping plate (10) is provided below the upper damping plate (11). An intermediate flexible layer (18) is provided between the lower damping plate (10) and the upper damping plate (11).

2. The piezoelectric actuator performance testing device according to claim 1, characterized in that: The bottom center of the base plate (9) is provided with an clearance opening groove, and the bottom of the detection hole (14) extends to the top of the clearance opening groove.

3. The piezoelectric actuator performance testing device according to claim 2, characterized in that: The bottom of the detection hole (14) is provided with a stepped positioning platform, the top of the displacement sensor (12) is positioned on the stepped positioning platform, and a fixed flange is provided on the outer wall of the displacement sensor (12). The fixed flange is fixed to the top of the clearance opening groove by bolts.

4. The piezoelectric actuator performance testing device according to claim 2, characterized in that: The lower damping plate (10), the upper damping plate (11) and the middle flexible layer (18) are all provided with avoidance grooves corresponding to the avoidance opening grooves.

5. The piezoelectric actuator performance testing device according to claim 4, characterized in that: The inner and outer exposed parts of the intermediate flexible layer (18) are provided with sealant (25), and the lower damping plate (10) and upper damping plate (11) corresponding to the sealant (25) are provided with anti-detachment arc grooves (24) larger than semicircles.

6. The piezoelectric actuator performance testing device according to claim 1, characterized in that: Multiple support screws (17) are evenly fixed at the bottom of the upper damping plate (11). The lower end of the support screw (17) passes through the middle flexible layer (18) and the lower damping plate (10) and is connected to a limit nut (20). The lower damping plate (10) outside the limit nut (20) is provided with an installation groove, and an elastic sleeve (19) is fitted on the outside of the support screw (17).

7. The piezoelectric actuator performance testing device according to claim 6, characterized in that: The lower outer side of the elastic sleeve (19) is covered with a shock-absorbing rubber sleeve (23), and the shock-absorbing rubber sleeve (23) is covered with a shock-absorbing spring (22).

8. The piezoelectric actuator performance testing device according to claim 7, characterized in that: The lower end of the shock-absorbing spring (22) is provided with a protective pad (21). The top of the protective pad (21) and the top of the mounting groove are both provided with positioning grooves. The top and bottom of the shock-absorbing rubber sleeve (23) are both provided with positioning bosses.

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