Piezoelectric adjusting frame

Abstract

The utility model relates to the technical field of precision optical devices, and discloses a piezoelectric adjusting frame which comprises a fixed plate, a movable plate, an elastic connecting assembly and a piezoelectric screw. And the movable plate corresponds to the fixed plate. The two ends of the elastic connecting assembly are connected with the fixed plate and the movable plate correspondingly. The piezoelectric screw comprises a threaded pipe and a screw rod. A first through hole is formed in the fixing plate. The threaded pipe penetrates through the first through hole and is fixed to the fixing plate. The screw abuts against the movable plate and is used for pushing the movable plate to be close to or away from the fixed plate. The moving plate comprises an X-axis moving plate and a Y-axis moving plate which are adjacent to each other. The three piezoelectric screws are used for pushing the movable plate to achieve X-axis deflection, Y-axis deflection and Z-axis linear motion. According to the utility model, the deflection angle and the linear movement range are larger, the positioning is more accurate, and the response is quicker. The X axis and the Y axis have the same deflection axis, and coupling between the axes is small. The overall structure is compact, control is easy, and the service life is long.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of precision optical devices, and concretely relates to a piezoelectric adjusting frame. BACKGROUND

[0002] In recent years, thanks to the progress of piezoelectric ceramic manufacturing process and technology, the current commercial piezoelectric ceramic sheet has the remarkable characteristics of miniaturization, reliability and stability, and is very suitable for making various precision adjustment and precision instrument applications. With the development of the photoelectric industry, piezoelectric ceramics are applied to optical adjusting frames, and the optical adjusting frame is mainly used for clamping, adjusting and adjusting the direction of the optical beam of the optical component, so that the optical beam can be quickly and accurately positioned. In order to make the optical adjusting frame realize X-axis, Y-axis deflection and linear motion, the existing optical adjusting frame often has the problems of complex structure, low repeated positioning accuracy, small deflection angle and linear motion distance.

[0003] Based on the above, the problem to be solved at present is to provide a piezoelectric adjusting frame which is compact in structure, high in accuracy, good in reliability and wide in adjustment range. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a piezoelectric adjusting frame, and aims at solving the problems of low repeated positioning accuracy, poor reliability, small deflection angle and distance of adjustment, and complex structure in the prior art.

[0005] The utility model is realized in this way, a piezoelectric adjusting frame, comprising:

[0006] A fixed plate;

[0007] A moving plate is arranged correspondingly with the fixed plate;

[0008] An elastic connecting assembly is connected with the fixed plate and the moving plate at both ends respectively;

[0009] A piezoelectric screw comprises a threaded tube and a screw rod which is threadedly connected with the threaded tube and can move linearly; a first through hole is arranged on the fixed plate, the threaded tube penetrates through the first through hole and is fixed on the fixed plate; the screw rod abuts against the moving plate and is used to push the moving plate to approach or move away from the fixed plate;

[0010] The moving plate comprises adjacent X-axis moving plates and Y-axis moving plates, and the piezoelectric screw is arranged as three, which is used to push the moving plate to realize X-axis deflection, Y-axis deflection and Z-axis linear motion.

[0011] Further, the included angle of the projection of the output ends of the three screw rods on the plane of the moving plate is approximately a right angle.

[0012] Further, the elastic connecting assembly comprises a tension spring, a first tension rod and a second tension rod; two ends of the tension spring are connected with the first tension rod and the second tension rod respectively; the fixed plate is provided with a second through hole, the moving plate is provided with a third through hole corresponding to the fixed plate, and the first tension rod and the second tension rod are installed in the second through hole and the third through hole respectively.

[0013] Further, the elastic connecting assembly is uniformly arranged between the three piezoelectric screws.

[0014] Further, the middle part of the moving plate is provided with a circular or C-shaped fourth through hole for light transmission.

[0015] Further, one side of the threaded pipe is provided with a detachable locking nut in threaded connection, and the other side of the threaded pipe is provided with an annular protrusion; the annular protrusion and the locking nut lock the fixed plate to the middle part of the threaded pipe.

[0016] Further, the piezoelectric screw further comprises a shell, a piezoelectric driving mechanism and a mechanism seat; the screw rod penetrates the shell, the piezoelectric driving mechanism, the mechanism seat and the threaded pipe in sequence; the shell is connected with the mechanism seat and surrounds a cavity, the piezoelectric driving mechanism is arranged in the cavity, and the threaded pipe is fixed to the side of the mechanism seat away from the shell.

[0017] The piezoelectric driving mechanism comprises a flexible hinge and a piezoelectric ceramic, the flexible hinge comprises a first clamp jaw and a second clamp jaw; the first clamp jaw and the second clamp jaw are respectively provided with inner threads corresponding to the outer threads of the screw rod, the first clamp jaw and the second clamp jaw clamp the screw rod in cooperation, the first clamp jaw and the second clamp jaw are connected with two ends of the piezoelectric ceramic, and the first clamp jaw and the second clamp jaw give the screw rod a rotating force under the action of the piezoelectric ceramic.

[0018] Further, the output end of the screw rod is provided as a rotatable ball head.

[0019] The piezoelectric adjusting frame has the following beneficial effects.

[0020] The piezoelectric adjusting frame has the following beneficial effects.

[0021] The piezoelectric adjusting frame has the following beneficial effects. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The utility model provides a three -dimensional structure schematic diagram of piezoelectric adjusting frame provided by the utility model,

[0023] Figure 2 The utility model provides an explosion map of piezoelectric adjusting frame provided by the utility model,

[0024] Figure 3 The utility model provides a plan view of piezoelectric adjusting frame provided by the utility model,

[0025] Figure 4 The utility model provides Figure 3 The utility model provides a A-A direction cut -surface figure of piezoelectric adjusting frame,

[0026] Figure 5 The utility model provides partial explosion map of piezoelectric screw,

[0027] Figure 6 The utility model provides a three -dimensional structure schematic diagram of piezoelectric drive mechanism,

[0028] In the drawing: 1 - fixed plate;11 - first through -hole;12 - second through -hole;2 - moving plate;21 - third through -hole;22 - fourth through -hole;23 - recess;201 - X -axis moving plate;202 - Y -axis moving plate;3 - elastic connecting component;31 - tension spring;32 - first pull rod;33 - second pull rod;4 - piezoelectric screw;41 - threaded tube;411 - lock nut;412 - annular protrusion;42 - screw;43 - shell;44 - piezoelectric drive mechanism;441 - flexible hinge;4411 - first clamping jaw;4412 - second clamping jaw;442 - piezoelectric ceramic;45 - mechanism seat;5 - ball head;6 - gasket. DETAILED DESCRIPTION

[0029] In order to make the utility model purposes, technical scheme and advantages more clearly, following combining with the drawing and example, the utility model is further detailedly explained. It should be understood that the specific example described here is only for explaining the utility model, and is not for limiting the utility model.

[0030] The implementation of the utility model is described in detail in the following combining with specific example.

[0031] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Reference Figures 1-6 The image shown is a preferred embodiment of the present invention.

[0033] The piezoelectric adjustment frame includes a fixed plate 1, a movable plate 2, an elastic connecting assembly 3, and a piezoelectric screw 4, as shown in the figure. Figures 1-2 Fixed plate 1 and movable plate 2 are respectively provided. Several elastic connecting components 3 are provided between fixed plate 1 and movable plate 2. The two ends of the elastic connecting components 3 are respectively connected to fixed plate 1 and movable plate 2, so that fixed plate 1 and movable plate 2 are elastically connected.

[0034] The piezoelectric screw 4 includes a threaded tube 41 and a screw 42. The threaded tube 41 has internal threads, and the screw 42 has external threads. The screw 42 is threadedly connected to the threaded tube 41. The screw 42 can move linearly along the threaded tube 41. The fixing plate 1 has a first through hole 11 for fixing the piezoelectric screw 4. The threaded tube 41 passes through the first through hole 11 and is fixed to the fixing plate 1. The screw 42 passes through the first through hole 11 and abuts against the moving plate 2, for pushing the moving plate 2 closer to or away from the fixing plate 1. Preferably, one side of the threaded tube 41 has a threaded, detachable locking nut 411, and the other side of the threaded tube 41 has an annular protrusion 412. The annular protrusion 412 and the locking nut 411 lock the fixing plate 1 to the middle of the threaded tube 41.

[0035] The movable plate 2 includes an adjacent X-axis movable plate 201 and a Y-axis movable plate 202, as shown in the figure. Figures 3-4The number of piezoelectric screws 4 is 3. The 3 piezoelectric screws 4 are evenly distributed on the X-axis moving plate 201 and the Y-axis moving plate 202, that is, one piezoelectric screw 4 is arranged on the X-axis moving plate 201, one piezoelectric screw 4 is arranged on the Y-axis moving plate 202, and one piezoelectric screw 4 is arranged at the intersection of the X-axis moving plate 201 and the Y-axis moving plate 202, which is used to push the moving plate 2 to realize X-axis deflection, Y-axis deflection and Z-axis linear motion. The X-axis, the Y-axis and the Z-axis are coordinate axes of a space rectangular coordinate system, and the X-axis and the Y-axis are parallel to the X-axis moving plate 201 and the Y-axis moving plate 202 respectively. Preferably, the included angle of the projection of the output ends of the 3 screw rods 42 on the plane of the moving plate 2 is approximately a right angle. The X-axis and the Y-axis have the same deflection axis and small coupling between the axes. The whole structure is compact, the control is simple, the service life is long.

[0036] The elastic connecting assembly 3 comprises a tension spring 31, a first tension rod 32 and a second tension rod 33. The tension spring 31 is provided with hooks at two ends, and the hooks at the two ends are connected with the first tension rod 32 and the second tension rod 33 respectively. The fixed plate 1 is provided with a second through hole 12, and the moving plate 2 is provided with a third through hole 21 corresponding to the fixed plate 1, and the first tension rod 32 and the second tension rod 33 are installed in the second through hole 12 and the third through hole 21 respectively. A plurality of elastic connecting assemblies 3 are evenly arranged between the 3 piezoelectric screws 4. The middle part of the moving plate 2 is provided with a circular or C-shaped fourth through hole 22 for light transmission. The middle part of the moving plate 2 can be used for installing an optical lens. The elastic connecting assembly 3 makes the whole structure compact and reliable.

[0037] The piezoelectric screw 4 further comprises a shell 43, a piezoelectric driving mechanism 44 and a mechanism base 45, which are arranged in sequence. Figure 5 The screw rod 42 penetrates the shell 43, the piezoelectric driving mechanism 44, the mechanism base 45 and the threaded tube 41 in sequence. The shell 43 is connected with the mechanism base 45 and surrounds a cavity, and the piezoelectric driving mechanism 44 is arranged in the cavity and connected with the mechanism base 45. The threaded tube 41 is fixed to the side of the mechanism base 45 away from the shell 43.

[0038] The piezoelectric driving mechanism 44 comprises a flexible hinge 441 and a piezoelectric ceramic 442, which are arranged in sequence. Figure 6 The flexible hinge 441 comprises a first clamping jaw 4411 and a second clamping jaw 4412 arranged oppositely. The first clamping jaw 4411 and the second clamping jaw 4412 are respectively provided with inner threads corresponding to the outer threads of the screw rod 42. The first clamping jaw 4411 and the second clamping jaw 4412 clamp the screw rod 42 in cooperation, and the first clamping jaw 4411 and the second clamping jaw 4412 are connected with the two ends of the piezoelectric ceramic 442. The first clamping jaw 4411 and the second clamping jaw 4412 give the screw rod 42 a rotating force under the action of the piezoelectric ceramic 442. The arrangement of the 3 piezoelectric screws makes the structure simple, the positioning high-precision, the resolution high, the control easy and the reliability good.

[0039] The output end of the screw rod 42 is arranged as a rotatable ball head 5. The moving plate 2 is correspondingly provided with a recess 23 on the side close to the ball head 5, and a gasket 6 is arranged in the recess 23, and the ball head 5 abuts against the gasket 6. The arrangement of the ball head 5 and the gasket 6 can effectively reduce the contact abrasion.

[0040] Working principle: one piezoelectric screw 4 of the X-axis moving plate 201 remains unchanged, the screw rods 42 of the piezoelectric screws 4 at the intersection of the X-axis moving plate 201 and the Y-axis moving plate 202 and the piezoelectric screw 4 of the Y-axis moving plate 202 are synchronously elongated, the Y-axis moving plate 202 is pushed to move, and the X-axis deflection of the moving plate 2 is realized.

[0041] One piezoelectric screw 4 of the Y-axis moving plate 202 remains unchanged, the screw rods 42 of the piezoelectric screws 4 at the intersection of the X-axis moving plate 201 and the Y-axis moving plate 202 and the piezoelectric screw 4 of the X-axis moving plate 201 are elongated, the X-axis moving plate 201 is pushed to move, and the Y-axis deflection of the moving plate 2 is realized.

[0042] The screw rods 42 of the three piezoelectric screws 4 are synchronously elongated and restored, and the Z-axis linear movement of the moving plate 2 is realized.

[0043] When the X-axis and the Y-axis are deflected, one piezoelectric screw 4 is the rotation fulcrum, and the other two piezoelectric screws 4 push the moving plate 2 to deflect; when the Z-axis is linearly moved, the three piezoelectric screws 4 are synchronously actuated, so that the deflection angle range and the linear movement range are larger, and the reaction is more rapid.

[0044] The utility model is not used to limit, any modification, equivalent replacement and improvement etc. made in the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A piezoelectric tuning fork, characterized by, The utility model relates to a kind of piezoelectric screw and piezoelectric screw driven moving plate, including: Fixed plate (1); Mobile plate (2) is correspondingly arranged with the fixed plate (1); Elastic connecting component (3) is connected with the fixed plate (1) and the mobile plate (2) respectively with both ends of the elastic connecting component (3); Piezoelectric screw (4) includes threaded tube (41) and screw rod (42) that can linearly move with the threaded tube (41) is screwed;First through-hole (11) is provided on the fixed plate (1), the threaded tube (41) penetrates the first through-hole (11) and is fixed on the fixed plate (1);Screw rod (42) is in abutment with the mobile plate (2), for pushing the mobile plate (2) to be close to or away from the fixed plate (1); The mobile plate (2) includes adjacent X-axis mobile plate (201) and Y-axis mobile plate (202), and the piezoelectric screw (4) is provided as 3, for pushing mobile plate (2) to realize X-axis deflection, Y-axis deflection and Z-axis linear motion.

2. The piezoelectric conditioning rack of claim 1, wherein, The included angle of the projection of the output end of the three screw rods (42) on the plane of the mobile plate (2) is approximately a right angle.

3. The piezoelectric conditioning rack of claim 1, wherein, The elastic connecting component (3) includes tension spring (31), first tension rod (32) and second tension rod (33);Both ends of the tension spring (31) are connected with the first tension rod (32) and the second tension rod (33) respectively;Second through-hole (12) is provided on the fixed plate (1), and the mobile plate (2) is provided with third through-hole (21) corresponding to the fixed plate (1), and the first tension rod (32) and the second tension rod (33) are respectively installed in the second through-hole (12) and the third through-hole (21).

4. The piezoelectric conditioning rack of claim 1, wherein, Several elastic connecting components (3) are evenly arranged between the three piezoelectric screws (4).

5. The piezoelectric conditioning rack of claim 1, wherein, The middle part of the mobile plate (2) is provided with a circular or C-shaped fourth through-hole (22) for light transmission.

6. The piezoelectric conditioning rack of claim 1, wherein, One side of the threaded tube (41) is provided with a detachable locking nut (411) connected by threads, and the other side of the threaded tube (41) is provided with an annular protrusion (412), and the annular protrusion (412) and the locking nut (411) lock the fixed plate (1) to the middle part of the threaded tube (41).

7. The piezoelectric conditioning rack of claim 1, wherein, The piezoelectric screw (4) further includes a shell (43), a piezoelectric driving mechanism (44) and a mechanism seat (45);The screw rod (42) penetrates the shell (43), the piezoelectric driving mechanism (44), the mechanism seat (45) and the threaded tube (41) in sequence;The shell (43) is connected with the mechanism seat (45) and encloses a cavity, the piezoelectric driving mechanism (44) is arranged in the cavity, and the threaded tube (41) is fixed to the side of the mechanism seat (45) away from the shell (43); The piezoelectric driving mechanism (44) comprises a flexible hinge (441) and a piezoelectric ceramic (442), the flexible hinge (441) comprises a first clamp jaw (4411) and a second clamp jaw (4412); the first clamp jaw (4411) and the second clamp jaw (4412) are respectively provided with inner threads corresponding to the outer threads of the screw rod (42), the first clamp jaw (4411) and the second clamp jaw (4412) clamp the screw rod (42) in cooperation, the first clamp jaw (4411) and the second clamp jaw (4412) are connected with two ends of the piezoelectric ceramic (442), and the first clamp jaw (4411) and the second clamp jaw (4412) give the screw rod (42) a rotating force under the action of the piezoelectric ceramic (442).

8. The piezoelectric conditioning rack of claim 1, wherein, The output end of the screw rod (42) is provided as a rotatable ball head (5).

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