CN215895065U - Flexible two-dimensional adjusting mechanism for translational motion of adjusted piece - Google Patents

Abstract

The application provides a flexible two-dimensional adjustment mechanism for being adjusted piece translation, flexible two-dimensional adjustment mechanism include the fine setting base that sets up and be located every adjustable direction and keep up the adjusting unit, wherein, two adjustable direction keep up mutually perpendicular and coplane, every adjustable direction keeps up the adjusting unit and includes fine setting screw, two first flexible pieces, flat board and two first connecting pieces, flat board is used for rigid connection to the lateral wall by the adjusting piece, fine setting screw rotatably arranges in the through-hole of fine setting base on this adjustable direction is kept up, fine setting screw contains the one end of rotatable steel ball and flat board point contact, two first flexible pieces are established respectively in the both sides of fine setting screw, the one end fixed connection of every first flexible piece is to fine setting base and the other end is connected to a first connecting piece, one end of each first link is connected to the translation plate.

Description

Flexible two-dimensional adjusting mechanism for translational motion of adjusted piece

Technical Field

The application relates to the technical field of machinery, in particular to a flexible two-dimensional adjusting mechanism for translational motion of an adjusted piece.

Background

In the process of assembling and adjusting the precision instrument, the positioning and fixing precision cannot be achieved through direct processing, and the precision instrument needs to be achieved through various adjusting schemes. For example, in the optical system adjustment, two-dimensional translational position adjustment of an optical element is often required, especially when micrometer-level adjustment is involved, the optical element is extremely sensitive to slight deformation or misalignment, the conventional adjustment means often causes slow adjustment progress or large adjustment error due to a defect of an adjustment mechanism, and at present, the planar position of the optical element is mainly changed by the following two ways: in the first mode, a two-dimensional adjusting mechanism mature in the market is adopted to realize translation, the mechanism can be disassembled after adjustment is completed, but before disassembly, the position of an optical element is easy to change due to the action of locking the optical element, because a part has processing errors, the rigid connection between the optical element and the mechanism can cause a micro gap between the optical element and the surface of an installation table, and the micro gap can be compressed when the optical element is locked, so that the part is deformed, and the optical axis of the optical element is deviated; the second mode is that the fine adjustment screws are adopted to realize the translation of the optical element, at least three fine adjustment screws are usually adopted to adjust the optical element, the fine adjustment screws are in point contact with the optical element, three screws are linked during operation, the optical element has the advantage of small position deviation when being locked, but the machining error between parts still can generate micro deformation under the locking pressure, and the mode is difficult to jointly adjust the three screws, if the three fine adjustment screws cannot work in a cooperative mode, the environment slightly vibrates, the position of the adjusted optical element can change again, and the implementation is troublesome.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is to provide a technical scheme that is used for being adjusted the piece translation.

According to one aspect of the application, a flexible two-dimensional adjusting mechanism for the translational movement of an adjusted piece is provided, wherein the flexible two-dimensional adjusting mechanism comprises a fine adjustment base arranged on the basis of two adjustable direction dimensions and an adjusting unit positioned on each adjustable direction dimension, the two adjustable direction dimensions are perpendicular to each other and coplanar, the adjusting unit on each adjustable direction dimension comprises a fine adjustment screw, two first flexible pieces, a flat plate and two first connecting pieces, the flat plate is used for being rigidly connected to the side wall of the adjusted piece, the fine adjustment screw is rotatably arranged in a through hole of the fine adjustment base on the adjustable direction dimension, the fine adjustment screw comprises one end of a rotatable steel ball and a flat contact plate, the two first flexible pieces are respectively arranged on two sides of the fine adjustment screw, one end of each first flexible piece is fixedly connected to the fine adjustment base, and the other end of each first flexible piece is connected to one first connecting piece, one end of each first link is connected to the translation plate.

Optionally, the flexible two-dimensional adjusting mechanism further comprises a compressing unit for applying a downward pressure to the adjusted piece, the compressing unit comprises an L-shaped arm, a second flexible piece, a brake nut and a ball head pressure lever, the second flexible piece is flexibly connected with the ball head lever, the ball head lever is inserted into an unthreaded hole at the upper end of the L-shaped arm, one end of the ball head pressure lever, which contains a rotatable steel ball, is in point contact with the adjusted piece, and the brake nut is screwed into a part of the ball head lever, which protrudes out of the L-shaped arm.

Compared with the prior art, the method has the following advantages: the flexible two-dimensional adjusting mechanism can realize the translation of an adjusted piece in two adjustable direction dimensions by screwing in and retreating the fine adjusting screw, the point contact between the fine adjusting screw and the translation plate can be always ensured through the first flexible piece, the adjusted piece follows the fine adjusting screw, and the fine adjusting screw is kept by the tension of the first flexible piece, so that the flexible connection is realized, when the adjustment is carried out in one adjustable direction dimension, the fine adjusting screw in the other adjustable direction dimension can slide relative to the side surface of the adjusted piece, and the first flexible piece can self-adapt to the distortion caused by the translation, based on the design of the flexible connection, the connecting part of the adjusted piece and a fixed structural piece is in a natural contact state in the adjustment process, the adjusted piece can be directly locked after the adjustment, and the overlarge stress between the adjusted piece and the mechanism can not be caused, the translational adjustment efficiency and the translational adjustment precision of the adjusted piece are obviously improved; moreover, the flexible two-dimensional adjusting mechanism is reasonable in design and simple in structure, only two fine adjusting screws need to be controlled during assembly and adjustment, and the operation is convenient; in addition, the flexible two-dimensional adjusting mechanism of this application range is wide, small in size, light in weight, easy dismounting, the transport of being convenient for, maintenance, low in production cost, convenient to popularize and use.

Drawings

FIG. 1 illustrates a schematic diagram of a flexible two-dimensional adjustment mechanism of one example of the present application;

FIG. 2 illustrates a schematic structural view of a flexible two-dimensional adjustment mechanism according to an example of the present application;

FIG. 3 illustrates a schematic structural view of another exemplary flexible two-dimensional adjustment mechanism of the present application;

FIG. 4 is a schematic diagram of an adjustment unit of the flexible two-dimensional adjustment mechanism of FIG. 3 in one of the adjustable direction dimensions;

fig. 5 is a schematic structural diagram of a pressing unit of the flexible two-dimensional adjusting mechanism shown in fig. 3.

The same or similar reference numbers in the drawings identify the same or similar elements.

Detailed Description

The present invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the utility model are shown, it being understood that one skilled in the art may modify the utility model herein described while still achieving the advantageous effects of the utility model. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the utility model.

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present application. This application may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The present application is described in further detail below with reference to the attached figures.

The application provides a flexible two-dimensional adjusting mechanism for adjusted piece translation, wherein, this flexible two-dimensional adjusting mechanism includes the fine setting base that keeps setting up and is located every adjustable direction and keeps up the adjusting unit, wherein, two adjustable directions keep up mutually perpendicular and coplane, and every adjustable direction keeps up the adjusting unit and includes fine setting screw, two first flexible spares, parallel plate and two first connecting pieces, parallel plate is used for rigid connection to by the lateral wall of adjusting the piece, fine setting screw rotatably arranges in the through-hole of fine setting base on this adjustable direction is kept up, fine setting screw contains the one end of rotatable steel ball and the parallel plate point contacts, two first flexible spares are established respectively in the both sides of fine setting screw, the one end fixed connection of every first flexible spare is to fine setting base and the other end is connected to a first connecting piece, one end of each first link is connected to the translation plate. In some embodiments, all components of the flexible two-dimensional adjusting mechanism are mounted on the fine tuning base, the two adjustable directions are perpendicular to each other and coplanar (i.e. in the X-axis direction and the Y-axis direction), and the structural components for realizing translational motion in each adjustable direction are the same, so that the components can be in contact with the adjusted component by means of the fine tuning screw, the first flexible component, the first connecting component and the translational plate, and realize flexible translational motion. The flexible two-dimensional adjusting mechanism adopts a flexible connection design, can be directly locked after the translational movement of the adjusted piece is completed, cannot cause overlarge stress between the adjusted piece and the mechanism, and can remarkably improve the translational adjustment efficiency and the installation precision of the adjusted piece; the flexible two-dimensional adjusting mechanism is reasonable in design and simple in structure, only two fine adjusting screws are required to be controlled during assembly and adjustment, the translation of an adjusted piece can be realized, and the operation is convenient; in addition, flexible two-dimensional guiding mechanism application range is wide, small in size, light in weight, easy dismounting, the transport of being convenient for, maintenance, low in production cost, convenient to popularize and use.

In some embodiments, the adjusted element may be any structure or element that needs to perform two-dimensional translation, for example, the adjusted element is an optical element (such as a lens) in an optical system. In some embodiments, the flexible two-dimensional adjusting mechanism can realize micron-level translation of the adjusted piece in two adjustable direction dimensions. In some embodiments, when the flexible two-dimensional adjusting mechanism is used for performing assembly and adjustment operations, the fine adjustment screw is rotated to realize the translational motion of the adjusted piece in two adjustable direction dimensions, the first flexible piece can always ensure that the adjusted piece is flexibly connected with the flexible two-dimensional adjusting mechanism, so that the adjusted piece follows the fine adjustment screw, the steel ball of the fine adjustment screw can always contact with the flat movable plate under the action of the first flexible piece, when the adjustment is performed in one adjustable direction dimension, the first flexible piece in the other adjustable direction dimension can slightly swing around the first connecting piece connected with the first flexible piece, and the steel ball of the fine adjustment screw can roll on the flat movable plate. In some embodiments, the translation distance of the adjusted piece in each adjustable direction dimension is less than or equal to 1.5 mm.

In some embodiments, the fine tuning base comprises two portions located on the two adjustable directions respectively and a corner portion located between the two portions, the two portions are located on the two adjustable directions respectively, and each portion has a through hole in the center for screwing in a fine tuning screw. In some embodiments, the fine tuning base comprises two separate parts, which are identical in structure and are respectively arranged in two adjustable directions, and each part has a through hole in the center for screwing in the fine tuning screw. In some embodiments, the through-hole is unthreaded; in other embodiments, the through-hole has internal threads.

In some embodiments, the first flexible member may be any flexible member, such as a tension spring, a rubber band, or the like. In some embodiments, the first connecting element includes any connecting element, such as a pin, etc., capable of restricting the first flexible element connected thereto from moving in a vertical direction (a direction perpendicular to both of the two adjustable directions, i.e., the Z-axis direction), but not from rotating about the vertical direction. In some embodiments, the two first connectors and the two first flexible members have the same height, and the distance between the two first connectors and the distance between the two first flexible members are the same, and the two first connectors are fixedly connected to the translation plate.

In some embodiments, the first flexible member is a tension spring, the first connecting member is a pin, one end of each pin is rigidly connected to the translational plate, one end of each ring of the tension spring is sleeved into the pin, and the other end of each ring is fixedly connected to the fine tuning base. In some embodiments, the flexible translation can be realized by means of contact of a fine adjustment screw, a tension spring, a pin shaft and a translation plate with an adjusted piece, the tension spring is arranged on each of two sides of the fine adjustment screw in parallel, the tension spring is connected with a fine adjustment base and the pin shaft, the tension spring is connected with the pin shaft to form a hinged connection, only the tension spring is limited to move transversely, the rotation freedom degree is not limited, one end of the pin shaft is rigidly connected with the translation plate, the other end of the pin shaft is open and is not processed, and one end of a ring of the tension spring is conveniently sleeved into the pin shaft.

In some embodiments, the two first flexible members are not coplanar with the mounting location of the fine adjustment screw on the fine adjustment base. In some embodiments, the mounting position of the two first flexible members on the fine adjustment base is lower than the mounting position of the fine adjustment screw on the fine adjustment base, so that when the flexible two-dimensional adjustment mechanism is used for realizing the translation of the adjusted member, the two first flexible members are closer to a mounting table (also referred to as a "fixed structural member" in the context, that is, a structural member to which the adjusted member needs to be fixed after the translation is completed).

In some embodiments, in each adjustable dimension, the through hole of the fine tuning base in the adjustable dimension is unthreaded, a threaded sleeve is fixed in the through hole, and the fine tuning screw is screwed into the threaded sleeve. In some embodiments, the fine tuning base is further provided with a vertical small hole communicated with the through hole, and the threaded sleeve can be fixed in the through hole through the small hole. In some embodiments, the threaded sleeve may be located entirely within the through-hole or may extend partially out of the through-hole.

In some embodiments, in each adjustable orientation dimension, the through hole of the fine tuning base in that adjustable orientation dimension is internally threaded, and the fine tuning screw is screwed directly into the through hole. In the embodiments, the through hole is a threaded hole, and the fine adjustment screw is combined with the threaded hole to realize screwing in and screwing out, so that the adjusted piece can translate in two adjustable direction dimensions.

In some embodiments, the flexible two-dimensional adjusting mechanism further comprises a pressing unit for applying a downward pressure to the adjusted member, the pressing unit comprises an L-arm, a second flexible member, a brake nut and a ball-head pressing rod, the second flexible member is flexibly connected with the ball-head rod, the ball-head rod is inserted into the light hole at the upper end of the L-arm, the ball-head pressing rod comprises one end of a rotatable steel ball and is in point contact with the adjusted member, and the brake nut is screwed into the portion of the ball-head rod protruding out of the L-arm. The pressing unit is used for generating a downward pressure to press the adjusted piece on the mounting table, so that the adjusted piece has motion stability and stronger anti-vibration characteristic in the adjusting process. In the assembling and adjusting process, when the fine adjusting screws on the two adjustable direction dimensions are rotated, the pressing units can always apply pressure to the adjusted piece and the mounting table, and the downward pressure can be adjusted by rotating the braking nuts. In some embodiments, after the adjusted piece is adjusted and before the flexible two-dimensional adjusting mechanism is removed, the adjusted piece can be locked to the mounting table by using a screw, and then the flexible two-dimensional adjusting mechanism is removed.

In some embodiments, the second flexible member may be any flexible telescopic element. In some embodiments, the second flexible member is a compression spring, and the compression spring is sleeved on the ball head rod.

In some embodiments, the fine tuning base comprises two portions located in the two adjustable direction dimensions, respectively, and a corner portion located between the two portions, the L-arm being fixed above the corner portion. In some embodiments, the fine tuning base comprises two separate parts, the two parts are identical in structure and are respectively arranged in two adjustable direction dimensions, and the L-arm can be fixedly connected to each part of the fine tuning base through a supporting unit, for example, one end of the supporting unit is fixedly connected to the closer end of the X-direction part of the fine tuning base, the other end of the supporting unit is fixedly connected to the closer end of the Y-direction part of the fine tuning base, and the L-arm is fixedly connected to the middle position of the supporting unit.

In some embodiments, after the adjustment is completed (i.e., after the adjusted member is translated to the target position), the flexible two-dimensional adjusting mechanism needs to be removed; preferably, before the flexible two-dimensional adjusting mechanism is removed, the adjusted piece can be locked to the mounting table by using a screw, then the flexible two-dimensional adjusting mechanism is removed, and the position deviation caused by the locking action can be effectively avoided or alleviated as the adjusted piece is always kept under pressure loading before being locked.

FIG. 1 illustrates a schematic diagram of a flexible two-dimensional adjustment mechanism of one example of the present application. In this example, the lens in the optical system is used as the adjusted object, the lens is placed on the lens fixing structure, the flexible two-dimensional adjusting mechanism is provided with two mutually perpendicular adjustable direction dimensions (i.e. the X direction and the Y direction shown in fig. 1), the flexible two-dimensional adjusting mechanism includes fine tuning bases (corresponding to the two separated parts of the fine tuning bases described above) respectively arranged on the two adjustable direction dimensions, the fine tuning bases are fixed on the surface of the lens fixing structure, the structural components for adjusting the lens translation in each adjustable direction dimension are the same, i.e. the same adjusting unit is arranged on each adjustable direction dimension, the adjusting unit includes a ball screw (i.e. a fine tuning screw), a thread sleeve, a tension spring, a pin and a translation plate (it should be noted that only some components are labeled in fig. 1), for the adjusting unit in each adjustable direction dimension, two sides of the through hole of the fine tuning base are respectively fixed with a tension spring (the distance between each tension spring and the through hole is the same), one end of each tension spring is connected with the fine tuning base, the other end of each tension spring is connected with the translational plate, two ends of the translational plate are respectively connected with one tension spring by adopting a pin, the pin only limits the movement of the end of each tension spring in the Z-axis direction, but does not limit the rotation of the end of each tension spring around the Z-axis, and further explanation of each component will be detailed in the following figure 2. The flexible two-dimensional adjusting mechanism has the following advantages: 1) the translation of the lens in X and Y directions is realized through the precession and the retreat of the ball screw, and the contact between the ball screw and the lens can be ensured all the time through the connection of the tension spring and the lens, so that the lens follows the ball screw; 2) the ball head screw is kept by the tension of the tension spring, flexible connection is realized, X-direction translation is adjusted, the head of the Y-direction ball head screw slides relative to the side face of the lens, the tension spring is distorted due to translation, the tension spring can be self-adaptive, the flexibility of the tension spring can be adaptive to distortion around a Z axis, and preferably, the translation of the lens is not easy to exceed 1.5 mm; 3) based on the flexible connection of the two points, the connecting part of the lens and the lens fixing structural part in the optical system is in a natural contact state in the assembling and adjusting process, and after the position of the lens is adjusted, the lens and the lens fixing structural part in the optical system cannot generate pulling force to cause structural deformation when the lens is fixed.

Fig. 2 shows a schematic structural diagram of a flexible two-dimensional adjustment mechanism according to an example of the present application. As shown in fig. 2, the lens 200 is placed above the lens fixing structure 100, the flexible two-dimensional adjusting mechanism includes fine tuning bases 301 respectively located on two adjustable dimensions, the fine tuning bases 301 are installed on the surface of the lens fixing structure 100, and the fine tuning bases 301 are rigidly connected to the lens fixing structure 100, each adjustable dimension is provided with the same adjusting unit, the adjusting unit includes tension springs 302, ball screws 303, a flat plate 304, pins 305 and a threaded sleeve 306, wherein the threaded sleeve 306 is fixed in a through hole at the center of the fine tuning base 301, the ball screws 303 are screwed into the threaded sleeve 306, one tension spring 302 is respectively fixed on each side of the fine tuning bases 301, one end of each tension spring 302 is connected to the fine tuning base 301 and the other end is connected to the flat plate 304, two ends of the flat plate 304 are respectively connected to one tension spring 302 by using the pins 305, the pins 305 only limit Z-directional movement of the tension springs 302 connected thereto, without limiting its rotation about the Z-axis, the side of the translational plate 304 is fixedly connected to the sidewall of the lens 200. During assembly and adjustment, the X-direction ball screw 303 is rotated, the lens is tightly attached to the X-direction ball screw 303 under the constraint of the tension spring 302 and moves forwards or backwards in a translation manner along the axial direction of the ball screw 303, at the moment, the lens 200 moves in a translation manner relative to the vertical direction of the axis of the Y-direction ball screw 303, and the Y-direction ball screw 303 is tightly attached to the lens 200 under the constraint of the tension spring 302; if the ball screw 303 is rotated in the Y direction, the movement of the lens 200 is the same as the rotation in the X direction.

Fig. 3 shows a schematic structural diagram of another exemplary flexible two-dimensional adjustment mechanism of the present application, fig. 4 shows a schematic structural diagram of the flexible two-dimensional adjustment mechanism shown in fig. 3 in one adjustable direction dimension, and fig. 5 shows a schematic structural diagram of a pressing unit of the flexible two-dimensional adjustment mechanism shown in fig. 3. As shown in fig. 3-5, still exemplarily, a lens in an optical system is used as an adjusted member, the lens 500 is placed above the mounting table 400, the flexible two-dimensional adjusting mechanism includes a fine tuning base 601, the fine tuning base 601 is fixedly mounted on the surface of the mounting table 400, all other components included in the flexible two-dimensional adjusting mechanism are mounted on the basis of the fine tuning base 601, two adjustable dimensions of directions are perpendicular to each other and coplanar, the structural components included in the adjusting unit in each dimension of directions are the same, specifically, each adjusting unit in each dimension of directions includes a flat tuning plate 602, a pin 603, a tension spring 604, a fine tuning screw 605 and a pressing unit, wherein one tension spring 604 is arranged in parallel on each side of the fine tuning screw 605, each tension spring 604 is connected to the fine tuning base 601 and the pin 603, the pin 603 is fixedly connected to the flat tuning plate 602, the fine tuning screw 605 is combined with a threaded hole of the fine tuning base 601 to achieve forward and backward movement, the fine adjustment screw 605 comprises one end of a rotatable steel ball, which is in contact with the flat movable plate 602, the flat movable plate 602 is rigidly connected with the side wall of the adjusted lens 500, wherein the installation positions of the tension spring 604 and the fine adjustment screw 605 on the fine adjustment base 601 are not coplanar, the tension spring 604 is closer to the installation platform, the tension spring 604 is connected with the pin shaft 603 to form a hinged connection, the pin shaft 603 only limits the transverse movement of the tension spring 604 and does not limit the rotational freedom degree of the tension spring, one end of the pin shaft 603 is rigidly connected with the flat movable plate, and the other end is open and is not processed, so that one end of a ring of the tension spring 604 can be conveniently sleeved into the pin shaft; the pressing unit is used for applying a downward pressure to a lens to be adjusted, the pressing unit further comprises an L-shaped arm 606, a ball head rod 607, a brake nut 608 and a pressure spring 609, one end of the ball head rod 607, which contains a rotatable steel ball, is in point contact with the lens 500 to be adjusted, the L-shaped arm 606 is fixedly installed at the corner of the fine adjustment base 601, the pressure spring 609 is sleeved in the ball head rod 607, the ball head rod 607 is inserted into an unthreaded hole in the upper end of the L-shaped arm 606 to ensure that the ball head rod 607 can slide relative to the L-shaped arm 606, the brake nut 608 is screwed into the part, protruding out of the L-shaped arm 606, of the ball head rod 607, and the downward pressure of the ball head rod 607 on a lens structure surface is adjusted by controlling the brake nut 608. Based on the flexible two-dimensional adjusting mechanism of this example, the fine adjustment screw 605 is rotated to realize the translation of the lens in two-dimensional directions, the tension spring 604 can always ensure that the adjusted lens 500 and the flexible two-dimensional adjusting mechanism realize flexible connection, so that the lens 500 follows the fine adjustment screw 605, the steel ball of the fine adjustment screw 605 is always in contact with the flat plate 602 under the action of the tension spring 604, when one dimension of the direction is adjusted, the tension spring 604 of the other dimension of the direction can slightly swing around the pin shaft 603 connected with the tension spring, the steel ball of the fine adjustment screw 605 can roll on the flat plate 602, and when the fine adjustment screws 605 of two dimensions of the direction are rotated, the compressing unit can always exert the downward pressure on the adjusted lens 500 and the mounting table 400, and the downward pressure can be adjusted by rotating the brake nut 608. Preferably, before the flexible two-dimensional adjusting mechanism is removed after the installation and adjustment is completed, the lens 500 can be locked to the mounting table 400 by using screws, and then the flexible two-dimensional adjusting mechanism is removed, so that the lens 500 is always kept under pressure loading before being locked, and the lens position deviation caused by the locking action can be effectively avoided or alleviated.

The application also provides a method for the translational motion of the adjusted piece, wherein the method comprises the following steps: assembling the flexible two-dimensional adjusting mechanism, fixing a fine tuning base of the flexible two-dimensional adjusting mechanism on the mounting table, and rigidly connecting a translation plate of the flexible two-dimensional adjusting mechanism on each adjustable direction dimension to the side wall of the adjusted piece; and rotating at least one fine adjustment screw in the adjustable direction dimension to enable the adjusted piece to translate to a target position, wherein the first flexible piece can enable the steel ball of the fine adjustment screw and the translation plate to always maintain point contact. Care is required when screwing in the fine tuning base in view of the fine thread of the fine tuning screw. In some embodiments, after the adjustment is completed (i.e., after the adjusted member is translated to the target position), the flexible two-dimensional adjusting mechanism needs to be removed; preferably, before the flexible two-dimensional adjusting mechanism is removed, the adjusted piece can be locked to the mounting table by using a screw, then the flexible two-dimensional adjusting mechanism is removed, and the position deviation caused by the locking action can be effectively avoided or alleviated as the adjusted piece is always kept under pressure loading before being locked.

In some embodiments, the assembled flexible two-dimensional adjustment mechanism comprises a compression unit, the method further comprising: and the downward pressure of the ball rod on the adjusted piece is adjusted by controlling the control nut. When the fine adjustment screws with two adjustable direction dimensions are rotated, the pressing units can always apply downward pressure on the adjusted piece and the mounting table.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims (8)

1. A flexible two-dimensional adjusting mechanism for the translational movement of an adjusted piece is disclosed, wherein the flexible two-dimensional adjusting mechanism comprises a fine adjustment base arranged on the basis of two adjustable direction dimensions and an adjusting unit positioned on each adjustable direction dimension, the two adjustable direction dimensions are perpendicular to each other and are coplanar, the adjusting unit on each adjustable direction dimension comprises a fine adjustment screw, two first flexible pieces, a translational plate and two first connecting pieces, the translational plate is used for being rigidly connected to the side wall of the adjusted piece, the fine adjustment screw is rotatably arranged in a through hole of the fine adjustment base on the adjustable direction dimension, the fine adjustment screw comprises one end of a rotatable steel ball and a point contact of the translational plate, the two first flexible pieces are respectively arranged on two sides of the fine adjustment screw, one end of each first flexible piece is fixedly connected to the fine adjustment base, and the other end of each first flexible piece is connected to one first connecting piece, one end of each first link is connected to the translation plate.

2. The flexible two-dimensional adjustment mechanism of claim 1, wherein the first flexible member is a tension spring, the first connecting member is a pin, one end of each pin is rigidly connected to the translational plate, one end of a belt loop of each tension spring is sleeved into the pin and the other end is fixedly connected to the fine tuning base.

3. The flexible two-dimensional adjustment mechanism of claim 1 or 2, wherein the two first flexible members are not coplanar with a mounting location of the trim screw on the trim base.

4. A flexible two-dimensional adjustment mechanism according to claim 1 or 2, wherein, in each adjustable dimension, the through hole of the fine adjustment base in that dimension is unthreaded, a threaded sleeve being secured within the through hole, the fine adjustment screw being threaded into the threaded sleeve.

5. A flexible two-dimensional adjustment mechanism according to claim 1 or 2, wherein in each adjustable orientation dimension the through hole of the fine tuning base in that dimension has an internal thread, the fine tuning screw being screwed directly into the through hole.

6. The flexible two-dimensional adjustment mechanism of claim 1, further comprising a compression unit for applying a downward pressure to the adjusted member, wherein the compression unit comprises an L-arm, a second flexible member flexibly connected to the ball-end compression bar, a brake nut and a ball-end compression bar, the ball-end compression bar is inserted into the optical hole at the upper end of the L-arm, the ball-end compression bar comprises one end of the rotatable steel ball and the adjusted member point contact, and the brake nut is screwed into the portion of the ball-end compression bar protruding out of the L-arm.

7. The flexible two-dimensional adjustment mechanism of claim 6, wherein the second flexible member is a compression spring that is nested within the ball-nose strut.

8. The flexible two-dimensional adjustment mechanism of claim 6 or 7, wherein the fine tuning base comprises two portions located in the two adjustable direction dimensions, respectively, and a corner portion located between the two portions, the L-arm being fixed above the corner portion.

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