Full-flexible hinge fastening type optical adjusting support

Abstract

The invention relates to the technical field of adjusting supports, in particular to a full-flexible hinge fastening type optical adjusting support. In order to solve the problems that an existing optical adjusting support is insufficient in single-side locking structure stability, bolt assembly is prone to being not concentric due to manufacturing errors, and deformation is difficult due to the fact that the torsion rigidity of a flexible hinge is too large, the following technical scheme is provided: the optical adjusting support comprises a bottom plate and a deflection frame which are oppositely arranged in parallel, and the deflection frame is arranged in an L shape; a flexible mechanism is connected between the bottom plate and the deflection frame, and the device is characterized by further comprising two sets of flexible hinges, the two sets of flexible hinges are installed at the two ends of the deflection frame, the sides, away from the deflection frame, of the two sets of flexible hinges are connected with a mounting plate through connecting plates, and the mounting plate is relatively parallel to the bottom plate; and the adjusting assembly is vertically mounted between the bottom plate and the mounting plate. The stability, the adjusting precision and the assembling and adjusting efficiency of the optical adjusting support are improved, the machining cost is reduced, and the application range of a precise adjusting scene is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of adjustment brackets, and particularly to a fully flexible hinge fastening type optical adjustment bracket. Background Art

[0002] In the field of precision alignment of optical devices, the stability and adjustment accuracy of optical adjustment brackets are crucial. The existing optical adjustment bolt solutions mainly adopt the cooperation structure of fine-thread bolts and copper nuts. With good thread fitting accuracy, this structure can achieve a certain degree of precision adjustment. However, its technical limitations are significant: it can only achieve unilateral locking, and the other side relies on the way of spring stretching to maintain the system stability. This asymmetric locking mechanism results in insufficient overall structural stability and is prone to loosening in vibration or long-term use scenarios, affecting the collimation accuracy of the optical system.

[0003] To solve the defects of the traditional solutions, the existing technology has proposed an optical adjustment solution based on flexible hinges. This solution introduces a differential bolt structure and controls the hinge gap through the adjustment of the locking bolts. In theory, a more precise alignment effect can be achieved. However, the problem of bolt non-concentricity caused by manufacturing errors is significant. Since the assembly of flexible hinges and bolts requires extremely high machining accuracy, the inevitable tiny manufacturing errors in actual production will cause the bolt axis to deviate from the ideal position, thereby triggering thread fitting failure or stress concentration phenomena, which not only increases the processing cost but also seriously affects the alignment efficiency and reliability. At the same time, there are defects in the design of the bending-torsion combined structure of the flexible hinge. Existing flexible hinges often adopt a relatively large width dimension to balance the bending and torsional stiffness, which leads to too large torsional stiffness. In the precision adjustment scenario that requires small deformation, the hinge is difficult to achieve the expected flexible deformation, limiting the adjustment resolution and dynamic response range of the optical adjustment bracket. In view of this, the present invention proposes a fully flexible hinge fastening type optical adjustment bracket. Summary of the Invention

[0004] The purpose of the present invention is to address the problems existing in the background art, such as the insufficient structural stability of the existing optical adjustment bracket with a unilateral locking structure, the non-concentricity of bolt assembly easily caused by manufacturing errors, and the difficult deformation due to too large torsional stiffness of the flexible hinge, which are difficult to meet the high-precision alignment requirements, and to propose a fully flexible hinge fastening type optical adjustment bracket.

[0005] The technical solution of the present invention: A fully flexible hinge fastening type optical adjustment bracket, including a bottom plate and a deflection frame arranged relatively parallel to each other. The deflection frame is arranged in an L shape. A flexible mechanism is connected between the bottom plate and the deflection frame. It is characterized in that it further includes:

[0006] Two groups of flexible hinges. The two groups of flexible hinges are installed at both ends of the deflection frame. The sides of the two groups of flexible hinges away from the deflection frame are connected to an installation plate through a connecting plate. The installation plate is relatively parallel to the bottom plate;

[0007] The adjusting assembly is vertically installed between the base plate and the mounting plate.

[0008] Optionally, a first through hole is opened in the middle of the mounting plate, a second through hole is opened in a position of the bottom plate corresponding to the first through hole, and the second through hole is coaxially arranged with the first through hole.

[0009] Optionally, the flexible hinge is arranged in a "冂" shape.

[0010] Optionally, the width of the flexible hinge is smaller than the width of both ends of the deflection frame.

[0011] Optionally, the flexible mechanism includes a first mounting groove opened on the side of the base plate close to the deflection frame, a first connecting block is fixedly connected in the first mounting groove, a transition plate is fixedly connected to the end of the first connecting block away from the base plate, a second connecting block is installed on the side of the transition plate away from the first connecting block, a second mounting groove corresponding to the first mounting groove is opened on the side of the deflection frame close to the base plate, and one end of the second connecting block is fixedly connected to the second mounting groove.

[0012] Optionally, the base plate, deflection frame, flexible mechanism, flexible hinge, connecting plate and mounting plate are of integrated design.

[0013] Optionally, the adjustment assembly includes a threaded rod rotatably connected to the first through hole, two groups of planar thrust bearings are installed on the outer ring of the threaded rod, the two groups of planar thrust bearings are symmetrically arranged on both sides of the mounting plate, the two groups of planar thrust bearings are both fitted with the mounting plate, a group of planar thrust bearings on the side of the mounting plate close to the base plate and a side away from the mounting plate are provided with a retaining ring, the retaining ring is fixedly connected to the outer ring of the threaded rod and fits with the planar thrust bearing, and a nut is threadedly connected to the end of the threaded rod away from the base plate, and the nut fits with the planar thrust bearing.

[0014] Optionally, a threaded sleeve is threadedly connected to the threaded rod, and the threaded sleeve is fixedly connected to the second through hole.

[0015] Optionally, a mounting hole is provided in the base plate.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] The present invention adopts an integrated design of the bottom plate, the deflection frame, the flexible mechanism, the flexible hinge and other components, and avoids the manufacturing error of the traditional bolt assembly through the overall processing technology, ensures the coaxiality of the first through hole and the second through hole, and eliminates the jamming or stress concentration problem caused by the assembly deviation from the root;

[0018] A flexible transmission chain is further formed by connecting the flexible mechanism in series with the "冂"-shaped flexible hinge, wherein the flexible mechanism realizes basic adjustment of pitch and deflection through elastic deformation of the transition plate, and the flexible hinge reduces torsional stiffness by reducing the width, retaining only the motion characteristics dominated by bending deformation, avoiding deformation difficulties caused by excessive torsional stiffness of the traditional bending-torsion combined structure, and making the pitch adjustment of the optical element more sensitive and hysteresis-free;

[0019] In summary, the present invention improves the stability, adjustment accuracy and assembly efficiency of the optical adjustment bracket, reduces the processing cost, and broadens the application scope of precision adjustment scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of a fully flexible hinge fastening optical adjustment bracket is given;

[0021] Figure 2 It is a schematic diagram of the structure after the adjustment component is installed;

[0022] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure.

[0023] Reference numerals:

[0024] 1. Bottom plate; 11. Second through hole; 12. Mounting hole;

[0025] 2. Deflection frame;

[0026] 3. Flexible mechanism; 31. First mounting groove; 32. First connecting block; 33. Transition plate; 34. Second connecting block; 35. Second mounting groove;

[0027] 4. flexible hinge; 5. connecting plate; 6. mounting plate; 61. first through hole;

[0028] 7. Adjustment assembly; 71. Threaded rod; 72. Plane thrust bearing; 73. Snap ring; 74. Nut; 75. Threaded sleeve. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment

[0035] As Figure 1 As shown, a fully flexible hinge fastening type optical adjustment bracket proposed by the present invention includes a bottom plate 1. An installation hole 12 is provided in the bottom plate 1. Through the setting of the installation hole 12, it is used for the positioning and installation of optical devices, providing a reference fixed point and facilitating the installation of optical devices. A deflection frame 2 is arranged on one side of the bottom plate 1, and the deflection frame 2 is arranged in an L shape.

[0036] Furthermore, the above adjustment bracket includes a flexible mechanism 3 connected between the bottom plate 1 and the deflection frame 2. The flexible mechanism 3 includes a first installation groove 31 opened on the side of the bottom plate 1 close to the deflection frame 2. A first connection block 32 is fixedly connected in the first installation groove 31, providing a starting connection point for flexible deformation. One end of the first connection block 32 away from the bottom plate 1 is fixedly connected with a transition plate 33, serving as an intermediate conduction structure for flexible deformation. A second connection block 34 is installed on one side of the transition plate 33 away from the first connection block 32 to achieve flexible connection with the deflection frame 2. A second installation groove 35 corresponding to the first installation groove 31 is opened on the side of the deflection frame 2 close to the bottom plate 1, and one end of the second connection block 34 is fixedly connected in the second installation groove 35. Through the setting of the flexible mechanism 3, gapless transmission is realized by using the elastic deformation of materials, facilitating the pitching deflection of the deflection frame 2.

[0037] Furthermore, the above-mentioned adjustment bracket also includes two groups of flexible hinges 4, which are respectively connected to the two ends of the deflection frame 2. The flexible hinges 4 are set in a "冂" shape, and the motion characteristics dominated by bending deformation are realized through a thin-walled structure. The flexible hinges 4 are connected in series with the flexible mechanism 3 to construct a multi-degree-of-freedom flexible transmission chain to achieve deflection and pitch adjustment. The width of the flexible hinge 4 is smaller than the width of the two ends of the deflection frame 2. By reducing the cross-sectional size, the torsional stiffness is reduced, and the problem of excessive torsional stiffness and difficulty in deformation is solved. The two groups of flexible hinges 4 are respectively fixedly connected to the side away from the deflection frame 2 with a connecting plate 5 as an intermediate carrier for adjusting force transmission. The side of the connecting plate 5 away from the flexible hinge 4 is installed with a mounting plate 6 to provide a mounting base for the adjustment component 7. The bottom plate 1, the deflection frame 2, the flexible mechanism 3, the flexible hinge 4, the connecting plate 5 and the mounting plate 6 are of an integrated design. The assembly gap is eliminated through overall processing. The integrated design avoids assembly errors, ensures that the first through hole 61 and the second through hole 11 are on the same axis, and ensures the coaxiality accuracy of the adjustment transmission. The first through hole 61 and the second through hole 11 can be smooth holes or threaded holes. Due to their integrated design, they can remain coaxial when drilling the threaded holes, so that the first through hole 61 and the second through hole 11 can be directly connected by stepped bolts. At the same time, the threads at both ends of the stepped bolts are different to achieve differential adjustment.

[0038] For details, please refer to Figure 2 and Figure 3The above-mentioned adjustment bracket includes two groups of adjustment components 7, which are respectively installed in two groups of mounting plates 6 to form a symmetrical adjustment structure to balance the force. A first through hole 61 is opened in the middle of the mounting plate 6, and a second through hole 11 is opened at a position corresponding to the first through hole 61 on the bottom plate 1. The second through hole 11 is coaxially arranged with the first through hole 61 to provide a linear motion guide path for the threaded rod 71. The adjustment component 7 includes a threaded rod 71 rotatably connected to the first through hole 61, which is a transmission element that converts rotational motion into linear displacement. Two sets of planar thrust bearings 72 are installed on the outer ring of the threaded rod 71 to bear axial loads and reduce rotational friction. The two sets of planar thrust bearings 72 are symmetrically arranged on both sides of the mounting plate 6. The two sets of planar thrust bearings 72 are both fitted with the mounting plate 6. A set of planar thrust bearings 72 on the side of the mounting plate 6 close to the base plate 1 and a side away from the mounting plate 6 are provided with a retaining ring 73. The retaining ring 73 is fixedly connected to the outer ring of the threaded rod 71 and fits with the planar thrust bearing 72 to limit the axial displacement of the bearing. A nut 74 is threadedly connected to the end of the threaded rod 71 away from the base plate 1. The nut 74 fits with the planar thrust bearing 72 to fix the bearing position through the tightening force and provide a preload. Through the clamping ring 73 and the nut 74, the two sets of planar thrust bearings 72 are locked on both sides of the mounting plate 6, so that the threaded rod 71 can stably rotate in place, ensure the rotation accuracy and avoid axial movement. At the same time, the setting of the nut 74 provides a force point for manual operation, which is convenient for rotating the threaded rod 71. The threaded rod 71 is threadedly connected with a threaded sleeve 75, which is fixedly connected to the second through hole 11 to form a fixed thread pair transmission structure, so that when the threaded rod 71 rotates, the threaded sleeve 75 is driven to move along the length direction of the threaded rod 71, adjust the distance between the mounting plate 6 and the base plate 1, and realize the conversion from linear displacement to angular deflection, thereby adjusting the pitch attitude of the deflection frame 2 and accurately controlling the tilt angle of the optical element.

[0039] In this embodiment, the first connecting block 32 is fixed to the first mounting groove 31 of the bottom plate 1, the second connecting block 34 is fixed to the second mounting groove 35 of the deflection frame 2, and the transition plate 33 transmits the pitch deflection force through elastic deformation to achieve gapless transmission. The "冂"-shaped flexible hinge 4 preferentially undergoes bending deformation through a thin-walled structure, and is connected in series with the flexible mechanism 3 to form a multi-degree-of-freedom transmission chain. The width of the flexible hinge 4 is smaller than the width of the two ends of the deflection frame 2, which reduces the torsional stiffness and ensures flexible deformation only in the pitch direction to avoid jamming.

[0040] Two sets of adjusting components 7 are symmetrically installed on the mounting plate 6 of the connecting plate 5. Through an integrated design, it is ensured that the first through hole 61 is coaxial with the second through hole 11 of the bottom plate 1, providing a linear motion guide for the threaded rod 71. By applying force to rotate the threaded rod 71 with the nut 74, the planar thrust bearing 72 reduces rotational friction and bears axial loads, and the snap ring 73 locks the bearing position with the nut 74 to prevent axial movement of the threaded rod 71. The threaded rod 71 and the threaded sleeve 75 fixed to the second through hole 11 form a transmission pair, and the rotational motion of the threaded rod 71 is converted into the linear displacement of the threaded sleeve 75, thereby adjusting the distance between the mounting plate 6 and the bottom plate 1.

[0041] When the two sets of adjusting components 7 are adjusted synchronously, the mounting plate 6 drives the flexible hinge 4 to deform synchronously through the connecting plate 5, and the flexible hinge 4 pushes the deflection frame 2 to pitch and deflect around the fulcrum of the flexible mechanism 3, realizing precise adjustment of the tilt angle of the optical element. Through the micro-displacement control of the adjusting component 7, sub-micron-level adjustment of the pitch angle of the optical element is achieved, which is suitable for high-precision scenarios such as laser light path collimation and interferometer optical path calibration.

[0042] The above specific embodiments are merely an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A fully flexible hinge fastening type optical adjustment bracket, comprising a bottom plate (1) and a deflection bracket (2) which are arranged relatively parallel, the deflection bracket (2) is arranged in an L shape, and a flexible mechanism (3) is connected between the bottom plate (1) and the deflection bracket (2), characterized in that, Also includes: Two groups of flexible hinges (4), the two groups of flexible hinges (4) are installed at both ends of the deflection frame (2), the sides of the two groups of flexible hinges (4) away from the deflection frame (2) are connected to a mounting plate (6) via a connecting plate (5), and the mounting plate (6) is relatively parallel to the bottom plate (1); The adjustment assembly (7) is vertically mounted between the base plate (1) and the mounting plate (6).

2. The all-flexible hinge fastening type optical adjustment bracket according to claim 1, wherein A first through hole (61) is provided in the middle of the mounting plate (6), a second through hole (11) is provided in a position of the bottom plate (1) corresponding to the first through hole (61), and the second through hole (11) is coaxially arranged with the first through hole (61).

3. The all-flexible hinge fastening type optical adjustment bracket according to claim 2, wherein The flexible hinge (4) is arranged in a "冂" shape.

4. The all-flexible hinge fastening type optical adjustment bracket according to claim 3, wherein, The width of the flexible hinge (4) is smaller than the width of the two ends of the deflection frame (2).

5. The all-flexible hinge fastening type optical adjustment bracket according to claim 4, characterized in that, The flexible mechanism (3) comprises a first mounting groove (31) provided on a side of the bottom plate (1) close to the deflection frame (2); a first connecting block (32) is fixedly connected in the first mounting groove (31); a transition plate (33) is fixedly connected to one end of the first connecting block (32) away from the bottom plate (1); a second connecting block (34) is installed on the side of the transition plate (33) away from the first connecting block (32); a second mounting groove (35) corresponding to the first mounting groove (31) is provided on the side of the deflection frame (2) close to the bottom plate (1); and one end of the second connecting block (34) is fixedly connected to the second mounting groove (35).

6. The all-flexible hinge fastening type optical adjustment bracket according to claim 5, wherein The base plate (1), the deflection frame (2), the flexible mechanism (3), the flexible hinge (4), the connecting plate (5) and the mounting plate (6) are of an integrated design.

7. The all-flexible hinge fastening type optical adjustment bracket according to claim 6, characterized in that, The adjustment assembly (7) comprises a threaded rod (71) rotatably connected to the first through hole (61); two groups of planar thrust bearings (72) are installed on the outer ring of the threaded rod (71); the two groups of planar thrust bearings (72) are symmetrically arranged on both sides of the mounting plate (6); the two groups of planar thrust bearings (72) are both in contact with the mounting plate (6); a group of planar thrust bearings (72) on the side of the mounting plate (6) close to the base plate (1) is provided with a retaining ring (73) on the side away from the mounting plate (6); the retaining ring (73) is fixedly connected to the outer ring of the threaded rod (71) and is in contact with the planar thrust bearing (72); a nut (74) is threadedly connected to one end of the threaded rod (71) away from the base plate (1); the nut (74) is in contact with the planar thrust bearing (72).

8. The all-flexible hinge fastening type optical adjustment bracket according to claim 7, characterized in that, A threaded sleeve (75) is threadedly connected to the threaded rod (71), and the threaded sleeve (75) is fixedly connected to the second through hole (11).

9. The all-flexible hinge fastening type optical adjustment bracket according to claim 8, characterized in that, The bottom plate (1) is provided with a mounting hole (12).

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