CN115248487A

CN115248487A - Flexible two-dimensional adjusting mechanism and method for translational motion of adjusted piece

Info

Publication number: CN115248487A
Application number: CN202110458829.6A
Authority: CN
Inventors: 孙思华; 刘军凯; 李宇
Original assignee: Raintree Scientific Instruments Shanghai Corp
Current assignee: Raintree Scientific Instruments Shanghai Corp
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2022-10-28

Abstract

The application provides a flexible two-dimensional guiding mechanism and method for being adjusted piece translation, flexible two-dimensional guiding mechanism include the fine setting base that sets up and be located every adjustable direction and keep up the adjustment unit based on two adjustable directions, wherein, two adjustable directions keep up mutually perpendicular and coplane, and every adjustable direction keeps up the adjustment unit including fine setting screw, two first flexible pieces, flat board and two first connecting pieces, flat board is used for rigid connection to by the lateral wall of adjustment piece, fine setting screw rotatably arranges in the fine setting base is in this adjustable direction and keeps up the downthehole, fine setting screw contain rotatable steel ball one end with flat board point contact, two first flexible pieces are established respectively fine setting screw's both sides, the one end fixed connection of every first flexible piece to fine setting base and other end are connected to a first connecting piece, the one end of every first connecting piece is connected to flat board.

Description

Flexible two-dimensional adjusting mechanism and method for translation of adjusted piece

Technical Field

The application relates to the technical field of machinery, in particular to a flexible two-dimensional adjusting mechanism and a flexible two-dimensional adjusting method for translation 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, and the mechanism can be detached after adjustment is completed, but before detachment, 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 optical element is rigidly connected with the mechanism, so that a micro gap is generated between the optical element and the surface of an installation table, and the micro gap is 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.

Disclosure of Invention

The purpose of this application is to provide a technical scheme who is used for by the translation of adjustment piece.

According to one aspect of the application, a flexible two-dimensional adjusting mechanism for the translational motion 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 located 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, the other end of each first flexible piece is connected to one first connecting piece, and one end of each first connecting piece is connected to the flat 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.

According to another aspect of the application, a method for translational movement of an adjusted member is provided, wherein the method comprises:

fixing an adjusted piece on a mounting table, assembling the flexible two-dimensional adjusting mechanism, 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 fixing the fine adjustment base on the mounting table;

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.

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, and can always ensure the point contact between the fine adjusting screw and the translation plate through the first flexible piece, so that the adjusted piece follows the fine adjusting screw, and the fine adjusting screw is kept by the tension of the first flexible piece, thereby realizing flexible connection; moreover, the flexible two-dimensional adjusting mechanism is reasonable in design and simple in structure, only two fine adjustment screws are required to be controlled during installation and adjustment, and the operation is convenient; in addition, the flexible two-dimensional adjusting mechanism of the application has the advantages of wide application range, small size, light weight, convenience in disassembly and assembly, convenience in carrying and maintenance, low production cost and convenience in popularization and use.

Drawings

FIG. 1 illustrates a schematic diagram of an exemplary flexible two-dimensional adjustment mechanism 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 invention are shown, it being understood that one skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

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 drawing figures.

The application provides a flexible two-dimensional guiding mechanism for being adjusted piece translation, wherein, this flexible two-dimensional guiding mechanism includes the fine setting base that keeps setting up and is located every adjustable direction and keeps up the adjustment unit based on two adjustable directions, wherein, two adjustable directions keep up mutually perpendicular and coplane, and every adjustable direction keeps up the adjustment unit including fine setting screw, two first flexibles, flat board and two first connecting pieces, the flat board is used for rigid connection to by the lateral wall of adjustment piece, fine setting screw rotatably arranges in fine setting base is in this adjustable direction keeps up the through-hole, fine setting screw contain rotatable steel ball one end with flat board point contact, two first flexibles are established respectively fine setting screw's both sides, the one end fixed connection of every first flexible to fine setting base and other end are connected to a first connecting piece, and the one end of every first connecting piece is connected to the flat board. 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 micrometer-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 1.5mm.

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, the two parts have the same structure and are respectively arranged on two adjustable direction dimensions, and the center of each part is provided with a through hole 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 flat plate with an adjusted piece, the tension spring is arranged on each side of the fine adjustment screw in parallel and 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 lateral movement of the tension spring is limited, the rotational freedom degree is not limited, one end of the pin shaft is rigidly connected with the flat plate, the other end of the pin shaft is open and is not processed, and the pin shaft is conveniently sleeved with one end of a ring of the tension spring.

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 (hereinafter also referred to as "fixed structural member", 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 orientation 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 directions, 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 piece 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, a lens in an optical system is used as an adjusted member, the lens is placed on a lens fixing structure, a 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 adjustment bases (corresponding to two separated parts of the fine adjustment bases described above) respectively arranged on the two adjustable direction dimensions, the fine adjustment bases are fixed on the surface of the lens fixing structure, structural components for adjusting the translation of the lens in each adjustable direction dimension are the same, that is, the same adjusting unit is arranged on each adjustable direction dimension, the adjusting unit includes a ball screw (i.e. a fine adjustment screw), a thread sleeve, tension springs, pins and a flat plate (only some components are labeled in fig. 1), for the adjusting unit in each adjustable direction dimension, one tension spring (the distance between each tension spring and the through hole is the same) is respectively fixed on both sides of the through hole of the fine adjustment base, one end of each tension spring is connected to the fine adjustment base and the other end of the flat plate is connected to one tension spring by the pin, only the end of the Z axis is restricted from moving around the Z axis, but rotation of each Z axis is not restricted in each Z axis, and detailed description in the following drawings 2. The flexible two-dimensional adjusting mechanism has the following advantages: 1) Translation of the lens in X and Y directions is realized through screwing in and retreating off the ball head screw, and the contact between the ball head screw and the lens can be always ensured through the connection of the tension spring and the lens, so that the lens follows the ball head 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 1.5mm; 3) Based on the flexible connection of the two points, the connection 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 lens position 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 adjustment mechanism includes fine adjustment bases 301 respectively located on two adjustable dimensions, the fine adjustment bases 301 are installed on the surface of the lens fixing structure 100, the fine adjustment bases 301 are rigidly connected to the lens fixing structure 100, an identical adjustment unit is provided on each adjustable dimension, the adjustment 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 in the center of the fine adjustment base 301, the ball screws 303 are screwed into the threaded sleeve 306, one tension spring 302 is fixed on each side of the fine adjustment base 301, one end of each tension spring 302 is connected to the fine adjustment 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 pins 305, the pins 305 only limit the Z-direction movement of the ends of the tension springs 302 connected thereto, without limiting the rotation thereof around the Z-axis, and the side surfaces of the flat plate 304 are fixedly connected to the side walls of the lens 200. During assembly and adjustment operation, 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 with 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 adjustment mechanism includes a fine adjustment base 601, the fine adjustment base 601 is fixedly mounted on the surface of the mounting table 400, all other components included in the flexible two-dimensional adjustment mechanism are mounted based on the fine adjustment base 601, two adjustable dimensions are perpendicular to and coplanar with each other, the structural components included in the adjustment unit in each dimension are the same, specifically, each adjustment unit in each dimension includes a flat adjustment plate 602, a pin 603, a tension spring 604, a fine adjustment screw 605 and a pressing unit, wherein, one tension spring 604 is arranged in parallel on each side of the fine adjustment screw 605, each tension spring 604 is connected to the fine adjustment base 601 and the pin 603, the pin 603 is fixedly connected to the flat adjustment plate 602, the fine adjustment screw 605 is combined with a threaded hole of the fine adjustment base 601 to achieve forward and backward movement, the fine adjustment screw 605 includes one end of a rotatable steel ball and the flat adjustment plate 602, the flat adjustment plate 602 is rigidly connected to a side wall of the adjusted lens 500, wherein, the tension spring 604 is not coplanar with the fine adjustment base 601, the pin 603, the other end of the pin 603 is connected to the pin 603, and the other end of the flat plate 603 is connected to a ring 603 without limiting ring for limiting the tension spring 603, and the pin 603 is connected to the other end of the tension spring 603; 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, the ball head rod 607 can be ensured to 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 tuning screw 605 can be rotated to achieve 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 achieve flexible connection, so that the lens 500 follows the fine tuning screw 605, the steel ball of the fine tuning screw 605 is always in contact with the flat plate 602 under the action of the tension spring 604, when one direction dimension is adjusted, the tension spring 604 in the other direction dimension can slightly swing around the pin 603 connected with the tension spring, the steel ball of the fine tuning screw 605 can roll on the flat plate 602, and when the fine tuning screw 605 in the two direction dimensions is rotated, the pressing unit can always apply 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 disassembled 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 disassembled, and because the lens 500 is always kept under pressure loading before being locked, the lens position deviation caused by the locking action can be effectively avoided or alleviated.

The application also provides a method for the translation 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 piece 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 relieved as the pressure loading is always kept before the adjusted piece is locked.

In some embodiments, the assembled flexible two-dimensional adjustment mechanism comprises a compression unit, the method further comprising: and the control nut is controlled to adjust the downward pressure of the ball rod on the adjusted piece. 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 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 to denote any particular order.

Claims

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 and an adjusting unit, the fine adjustment base is arranged on the basis of two adjustable direction dimensions, the adjusting unit is 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 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 is in contact with the flat 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, the other end of each first flexible piece is connected to one first connecting piece, and one end of each first connecting piece is connected to the flat 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 any of claims 1 to 3, wherein in each adjustable dimension the through hole of the fine tuning base in that dimension is unthreaded, a threaded sleeve being secured within the through hole, the fine tuning screw being threaded into the threaded sleeve.

5. A flexible two-dimensional adjustment mechanism according to any of claims 1 to 3, 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 threaded directly into the through hole.

6. The flexible two-dimensional adjustment mechanism of any one of claims 1-5, 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 rod, a brake nut, and a ball-end press rod, wherein the ball rod is inserted into the optical hole at the upper end of the L-arm, the ball-end press rod comprises one end of the rotatable steel ball and the adjusted member in point contact, and the brake nut is screwed into the portion of the ball rod 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 stem.

8. A flexible two-dimensional adjustment mechanism according to claim 6 or 7, wherein the fine tuning base comprises two parts in the two adjustable orientation dimensions, respectively, and a corner part between the two parts, the L-arm being fixed above the corner part.

9. A method for translational movement of a member to be conditioned, wherein the method comprises:

assembling the flexible two-dimensional adjustment mechanism according to any one of claims 1 to 8, fixing a fine adjustment base of the flexible two-dimensional adjustment mechanism on the mounting table, and rigidly connecting a translation plate of the flexible two-dimensional adjustment mechanism in each adjustable direction dimension to a 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 point contact can be always kept between the steel ball of the fine adjustment screw and the translation plate through the first flexible piece.

10. The method of claim 9, wherein assembled is a flexible two-dimensional adjustment mechanism of any one of claims 6 to 8, the method further comprising:

and the downward pressure of the ball rod on the adjusted piece is adjusted by controlling the control nut.