Full-flexible attitude high-precision adjustment two-dimensional platform

Abstract

The utility model relates to the technical field of optical adjusting platforms, and discloses a full-flexible attitude high-precision adjusting two-dimensional platform, which comprises a base and an adjusting table parallel to the base. The nuts are located on the two sides of the adjusting table, a double-screw adjusting assembly is connected between the nuts and the base in a threaded mode, and the deformation degree of an opening between the base and the adjusting table is adjusted; the first flexible connecting piece is connected between the adjusting table and the nut so as to eliminate the friction influence generated when the deformation size of the opening is adjusted and the gap between the nut and the double-screw adjusting assembly, and meanwhile the length and angle of the first flexible connecting piece are adjusted when the deformation size of the opening is adjusted. According to the utility model, the purposes of full-flexible adjustment and adaptation to different-angle adjustment of an optical lens / lens are realized, the friction influence during the adjustment movement of the double-screw adjustment assembly is eliminated, the adjustment in two angle directions can be realized in one plane, and the size is small.

Description

Technical Field

[0001] The utility model relates to the technical field of optical adjustment platforms, in particular to a fully flexible posture high-precision adjustment two-dimensional platform. Background Art

[0002] The posture adjustment mechanism is a key component of the precision optical platform. The existing method is mainly to achieve posture adjustment through a rigid block supported by a steel ball or pin, and a spring and a fine-thread set screw. However, neither the spring rebound nor the fine-thread set screw can withstand large loads, so it can only be used in light load situations, and the application scenarios are limited. In addition, the combination of multiple parts makes manufacturing and assembly complicated.

[0003] A flexible hinge structure with adjustable deflection angle, with a prior art application number of 202311111656.6, proposes a flexible hinge mechanism to replace the rigid mechanism. It has a compact structure and is locked with high rigidity by combining a set screw and a tension bolt. However, the set screw and the tension bolt are mutually exclusive. When adjusting, the set screw needs to be loosened first, and then the deflection angle of the flexible hinge can be adjusted by the tension bolt. The operation is more troublesome and prone to damage. In addition, the structure also has a contradiction between stiffness and precision, that is: when coarse-thread screws are used, the stiffness is large, but the precision is low; when fine-thread screws are used, the precision is high, but the stiffness is small and the load capacity is poor. In addition, there is redundancy during adjustment, the logic is complex, and it is difficult to achieve electric adjustment.

[0004] A further prior art application number 202410368918.5 proposes a flexible hinge posture high-precision adjustment platform, which adopts a composition mechanism consisting of two rotating parts (double live bolts or double bolts + steering structure) and a moving part to form an adjustment pair (differential bolt), solving the contradiction between high-precision adjustment and bearing capacity. The double rotating part solution realizes the adjustment of the deflection angle by the opening length, and the single adjustment bolt is easy to adjust and can also be easily changed to electric adjustment.

[0005] However, there is a contradiction between the clearance and friction in the swing bolt or the pin shaft rotation pair. During operation, it is necessary to lock it to eliminate the clearance and ensure rotation. The tighter the lock, the greater the friction, which will be affected by the friction during adjustment. In addition, on the one hand, the angle and distance change during the adjustment process, so that the motor can only be fixed on the swing bolt rod, which is inconvenient to install and relatively expensive. On the other hand, in many cases, the adjustment platform used to adjust the optical reflector needs to adjust the freedom of two directions on a plane. If the prior technical solution is adopted, the two sets of angle adjustment combination will cause the disadvantages of complex structure and large volume.

[0006] Therefore, the utility model proposes a fully flexible posture high-precision adjustment two-dimensional platform to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide a fully flexible posture high-precision adjustment two-dimensional platform to solve the problems raised in the above-mentioned background technology, namely, the tighter the lock, the greater the friction, which will affect the adjustment, as well as the inconvenience of motor installation, high cost, and large size when combined adjustment.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] The fully flexible posture high-precision adjustment two-dimensional platform proposed by the utility model includes:

[0010] A base and an adjustment platform arranged parallel to each other;

[0011] Nuts are located on both sides of the adjustment platform, and double-screw adjustment components are threadedly connected between the nuts and the base to adjust the deformation size of the opening between the base and the adjustment platform;

[0012] A first flexible connector connected between the adjustment platform and the nut to eliminate the friction effect when the opening deformation size is adjusted and the gap between the nut and the double-screw adjustment assembly, and at the same time, the first flexible connector can adjust the length and angle when the opening deformation size is adjusted;

[0013] And, a second flexible connector connected between the base and the adjustment platform is adapted to produce an angle deflection when the deformation size of the opening is adjusted, and the first flexible connector is symmetrically arranged on both sides of the second flexible connector.

[0014] Optionally, a mounting hole for mounting an optical lens / lens is provided in the middle of the base.

[0015] Optionally, the adjustment platform, the first flexible connector and the nut may be integrally formed.

[0016] Optionally, the first flexible connection member is at least one group of open flexible hinges, and the opening directions of adjacent open flexible hinges are opposite.

[0017] Optionally, the first flexible connector is an elastic pin, and the elastic pin is fixed between the adjusting platform and the nut along the length direction of the adjusting platform.

[0018] Optionally, the second flexible connection member is an orthogonal flexible hinge or a spring bar.

[0019] Optionally, the orthogonal flexible hinge is composed of two integrally processed I-shaped flexible hinges, wherein the axial deflection direction of one I-shaped flexible hinge is arranged toward the double-screw adjustment assembly on one side; and the axial deflection direction of the other I-shaped flexible hinge is arranged toward the double-screw adjustment assembly on the other side.

[0020] Optionally, the spring bar is a round spring bar or a square spring bar.

[0021] Optionally, the double-screw adjustment assembly includes an integrally formed first bolt and a second bolt, wherein the first bolt and the second bolt have the same rotation direction and different thread pitches, and the first bolt and the second bolt are correspondingly matched and installed with the nut and the base;

[0022] The diameter of the first bolt is greater than the diameter of the second bolt;

[0023] The double-screw adjustment assembly also includes a driving member connected to one end of the first bolt or the second bolt, and the driving member is located on a side of the nut away from the base.

[0024] Optionally, the twin-screw adjustment assembly further includes a motor fixed to the outer end surface of the nut, a gear is mounted on the output end of the motor, and the gear cooperates with the driving member.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] 1. The utility model uses two sets of separately adjustable double-screw adjustment components between the base and the adjustment table to adjust the deformation size of the opening between the base and the adjustment table, thereby achieving the purpose of adapting to different angles of the optical lens.

[0027] 2. On the basis of the adjustable angle of the adjustment table, a flexible hinge or elastic pin that can rotate and stretch is added between the adjustment table and the nut, so that the length and angle of the adjustment table can be adaptively adjusted when the opening is deformed, and the posture and horizontal position of the nut can adapt to the deformation but remain unchanged, thereby realizing full flexible adjustment and eliminating the friction effect of the double-screw adjustment component during adjustment movement.

[0028] 3. The double bolts of the double-screw adjustment assembly use stepped bolts with different pitches to ensure a large adjustment range and high precision. A handwheel or gear is processed at one end to facilitate manual or electric adjustment.

[0029] 4. The utility model adopts orthogonal flexible hinges or square / circular spring bars to achieve adjustment of two angles in one plane, which occupies a small area and has stronger adaptability.

[0030] 5. The two-dimensional adjustment platform of the utility model solves the problems of the traditional optical adjustment platform having many components and poor stability, and the combined adjustment of the bolts and set screws of the flexible hinge mechanism being over-constrained and complicated to adjust.

[0031] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A three-dimensional diagram of the orthogonal flexible hinge + open flexible hinge combined structure of the utility model is given;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0035] Figure 3 A three-dimensional diagram of the orthogonal flexible hinge + elastic pin combination structure of the utility model is given;

[0036] Figure 4 for Figure 3 Right view of;

[0037] Figure 5 A three-dimensional diagram of the spring bar + open flexible hinge combination structure of the utility model is given;

[0038] Figure 6 for Figure 5 A stereogram in an upside-down state;

[0039] Figure 7 A three-dimensional diagram of the spring bar + elastic pin combination structure is given;

[0040] Figure 8 for Figure 7 Schematic diagram of the structure in side-standing state;

[0041] Fig. 9 This is a schematic diagram of the structure of the utility model with a motor.

[0042] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0043] 1-base, 11-mounting hole;

[0044] 2-adjusting table, 21-nut;

[0045] 3-first flexible connector, 31-opening flexible hinge, 32-elastic pin;

[0046] 4-second flexible connector, 41-orthogonal flexible hinge, 42-spring bar;

[0047] 5-double screw adjustment assembly, 51-first bolt, 52-second bolt, 53-driving member;

[0048] 6-motor, 61-gear. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] The utility model provides a fully flexible posture high-precision adjustment two-dimensional platform, including a base 1, an adjustment platform 2, a first flexible connector 3, a second flexible connector 4, a nut 21, and a double-screw adjustment assembly 5. Specifically, the middle part of the base 1 has a mounting hole 11 for mounting an optical lens / lens such as a reflector, and the base 1 and the adjustment platform 2 are in a state of being parallel to each other before adjustment, and there is a gap between each other. The adjustment platform 2 can be an L-shaped semi-open structure or a square full-enclosed frame structure, and the L-shaped semi-open structure is the optimal structure; if the square full-enclosed frame structure is selected, two nuts 21 are set diagonally (not shown in the figure of the utility model, only the L-shaped semi-open structure is shown), and both sides of each nut 21 are provided with a first flexible connector 3, and the two adjustment methods are the same. The latter is relatively complex in structure, high in cost, and difficult to manufacture relative to the former. The first flexible connector 3 and the nut 21 are arranged at the two side ends of the adjustment platform 2, wherein the first flexible connector 3 is located between the nut 21 and the adjustment platform 2, and the three can also be integrally processed and formed. The second flexible connector 4 is connected between the base 1 and the adjustment platform 2, and the two groups of first flexible connectors 3 and nuts 21 are symmetrically arranged on both sides of the second flexible connector 4, and have a stable balance adjustment relationship.

[0051] Furthermore, the double-screw adjustment assembly 5 is threadedly connected between the nut 21 and the base 1 to adjust the deformation size of the opening between the base 1 and the adjustment platform 2. Specifically, a threaded hole is opened on the base 1, and the double-screw adjustment assembly 5 includes a first bolt 51 and a second bolt 52 integrally formed along the length direction, wherein the diameter of the first bolt 51 is greater than the diameter of the second bolt 52, the first bolt 51 and the second bolt 52 have the same rotation direction and different pitches, and the first bolt 51 and the second bolt 52 are correspondingly adapted and installed with the nut 21 and the base 1. The first bolt 51 can be a bolt with a pitch of M6 0.8, and the second bolt 52 can be a bolt with a pitch of M50.7. A differential pull rod structure is used, and two bolts with the same rotation direction and different pitches are used to simultaneously cooperate with the nut 21 and the threaded hole on the base 1 to change the spacing between the base 1 and the adjustment table 2. Each time the bolt rotates one circle, the adjustment distance is 0.1 of the difference in pitch, which not only achieves precise adjustment but also ensures the strength of the bolt. At the same time, a torsional torque is generated during the adjustment of the double bolts, which stretches the double bolts up and down respectively, eliminating the gap between the bolts and the nuts and threaded holes.

[0052] It is worth noting that, in the above adjustment, the adjustment stroke s is calculated as the number of turns n*(bolt pitch difference) of the large bolt-first bolt 51, and the adjustment angle range (in radians) is the adjustment stroke divided by the distance from the center axis of the double bolt to the rotation center of the first flexible connector 3.

[0053] As in the above structure, it is preferred that the first bolt 51 with a larger diameter is arranged toward the direction of the adjustment platform 2, and is connected to the nut 21. A driving member 53 is installed at one end of the first bolt 51. The driving member 53 is located on the side of the nut 21 away from the base 1 for easy adjustment. The driving member 53 can be a hand wheel or a gear, and manual adjustment can be selected. Alternatively, a motor can be installed on the outer end surface of the nut 21, and the motor moves synchronously with the nut 21 when the double-screw adjustment assembly 5 is adjusted. A gear 61 is also installed at the output end of the motor 6. Fig. 9 As shown in FIG. 5 , the gear 61 is meshed with the driving member 53 to drive the double screws to rotate, which is electric adjustment.

[0054] Furthermore, the second flexible connector 4 is an orthogonal flexible hinge 41 or a spring bar 42, wherein the orthogonal flexible hinge 41 is composed of two integrally processed I-shaped flexible hinges, wherein the axial deflection direction of one I-shaped flexible hinge is arranged toward the double screw adjustment component 5 on one side; the axial deflection direction of the other I-shaped flexible hinge is arranged toward the double screw adjustment component 5 on the other side, so as to achieve angle adjustment in two directions in one plane. The spring bar 42 is a circular spring bar or a square spring bar, which is adapted to produce an angle deflection when adjusting the size of the opening deformation, and realizes the adjustment of any angle as the double screw adjustment component 5 changes.

[0055] Furthermore, the first flexible connector 3 connected between the adjustment platform 2 and the nut 21 is used to eliminate the friction effect when adjusting the size of the opening deformation and the gap between the nut 21 and the double-screw adjustment assembly 5, and at the same time, the first flexible connector 3 realizes the adjustment of the length and angle when adjusting the size of the opening deformation. Specifically, the first flexible connector 3 adopts at least one group of open flexible hinges 31 or elastic pins 32, and the opening directions of adjacent open flexible hinges 31 are opposite, and can be stretched left and right along the length direction of the adjustment platform 2 to adapt to the stroke changes caused by the adjustment of the double-screw adjustment assembly 5 to keep the posture and horizontal position of the nut 21 unchanged. At the same time, the open flexible hinges 31 or elastic pins 32 also adapt to the adjustment of angle changes, such as Figure 1 The arrows show the deformation direction of each part. During the initial screw-in process, the driver 53 is first rotated to drive the nut 21 to move downward, and the opening is slowly reduced until the large bolt (first bolt 51) reaches the threaded hole entrance of the base 1. During this process, the first flexible connector 3 is stretched toward both sides of itself, and the nut 21 moves downward, with its top position lower than the top position of the adjustment platform 2, driving the second flexible connector 4 to deflect toward the right nut 21 at the same time, and the first flexible connector 3 on the right side deflects from inside to outside between the adjustment platform 2 and the nut 21, ensuring that the posture of the nut 21 remains unchanged. Simultaneously, due to the deflection of the second flexible connector 4, the adjustment platform 2 tilts, and the first flexible connector 3 on the other side of the adjustment platform 2 deflects at a slight angle in the opposite direction (from outside to inside) to adapt to the nut 21 on that side to maintain an unchanged posture, and the entire two-dimensional platform is adjusted.

[0056] Embodiment 1

[0057] Reference Figure 1 , Figure 2 The fully flexible posture high-precision adjustment two-dimensional platform of this embodiment adopts a combined structure of an orthogonal flexible hinge 41 + an open flexible hinge 31, and can be adjusted manually or electrically.

[0058] In this embodiment, the driving member 53 on one side is rotated manually or driven by a motor. During the co-directional rotation of the double screws, the nut 21 is driven to move downward, and the opening is slowly reduced. During this process, the open flexible hinge 31 is stretched toward both sides of itself, and at the same time, the nut 21 moves downward, driving the orthogonal flexible hinge 41 to deflect toward the direction of the nut 21 on this side. During the same process, the open flexible hinge 31 deflects from the inside to the outside between the adjustment platform 2 and the nut 21, ensuring that the posture of the nut 21 remains unchanged.

[0059] Simultaneously, the open flexible hinge 31 on the other side of the adjustment platform 2 deflects slightly in the opposite direction (from outside to inside) because the adjustment platform 2 tilts slightly after the orthogonal flexible hinge 41 deflects.

[0060] Embodiment 2

[0061] Reference Figure 3 , Figure 4 Compared with the first embodiment, the fully flexible posture high-precision adjustment two-dimensional platform of this embodiment adopts an orthogonal flexible hinge 41 + elastic pin 32 combination structure, and the two open flexible hinges 31 are replaced by two elastic pins 32. The elastic pins 32 are laterally connected between the adjustment platform 2 and the nut 21, and the working principle is the same as that of the first embodiment.

[0062] Embodiment 3

[0063] Reference Figure 5 , Figure 6 Compared with the first embodiment, the fully flexible posture high-precision adjustment two-dimensional platform of this embodiment adopts a spring bar 42 + open flexible hinge 31 combination structure, and replaces the two orthogonal flexible hinges 41 with two spring bars 42. The working principle is the same as that of the first embodiment.

[0064] Embodiment 4

[0065] Reference Figure 7 , Figure 8 Compared with the third embodiment, the fully flexible posture high-precision adjustment two-dimensional platform of this embodiment adopts a spring bar 42 + elastic pin 32 combination structure, connecting two open flexible hinges 31 and two elastic pins 32, and the working principle is the same as that of the first embodiment.

[0066] In the above embodiments 1 to 4, the first flexible connector 3 located on both sides of the adjustment platform 2 can simultaneously select two open flexible hinges 31 or two elastic pins 32, or one side can be an open flexible hinge 31 and the other side can be an elastic pin 32, both of which can achieve the purpose of stretching and angle adjustment.

[0067] In the above content, the exemplary implementation of the scheme proposed by the utility model is described in detail with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the utility model, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed by the utility model can be combined in various ways without exceeding the protection scope of the utility model, which is determined by the attached claims.

Claims

1. Fully flexible posture high-precision adjustment two-dimensional platform, characterized by: include: A base (1) and an adjustment platform (2) arranged parallel to the base (1); Nuts (21) are located on both sides of the adjustment platform (2), and a double-screw adjustment assembly (5) is threadedly connected between the nuts (21) and the base (1) to adjust the deformation size of the opening between the base (1) and the adjustment platform (2); A first flexible connector (3) connected between the adjustment platform (2) and the nut (21) is used to eliminate the friction effect when the opening deformation size is adjusted and the gap between the nut (21) and the double-screw adjustment assembly (5), and at the same time, the first flexible connector (3) can adjust the length and angle when the opening deformation size is adjusted; Furthermore, a second flexible connector (4) connected between the base (1) and the adjustment platform (2) is adapted to produce an angular deflection when the size of the opening deformation is adjusted, and the first flexible connector (3) is symmetrically arranged on both sides of the second flexible connector (4).

2. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 1 is characterized by: A mounting hole (11) for mounting an optical lens / lens is provided in the middle of the base (1).

3. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 1 is characterized by: The adjustment platform (2), the first flexible connection member (3) and the nut (21) can be integrally formed.

4. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 1 is characterized by: The first flexible connection member (3) is at least one group of open flexible hinges (31), and the opening directions of adjacent open flexible hinges (31) are opposite.

5. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 1 is characterized by: The first flexible connecting member (3) is an elastic pin (32), and the elastic pin (32) is fixed between the adjusting platform (2) and the nut (21) along the length direction of the adjusting platform (2).

6. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 4 or 5, characterized in that: The second flexible connection member (4) is an orthogonal flexible hinge (41) or a spring bar (42).

7. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 6 is characterized by: The orthogonal flexible hinge (41) is composed of two integrally processed I-shaped flexible hinges, wherein the axial deflection direction of one of the I-shaped flexible hinges is arranged toward the double-screw adjustment component (5) on one side; and the axial deflection direction of the other I-shaped flexible hinge is arranged toward the double-screw adjustment component (5) on the other side.

8. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 6 is characterized by: The spring bar (42) is a circular spring bar or a square spring bar.

9. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 6, characterized in that: The double-screw adjustment assembly (5) comprises a first bolt (51) and a second bolt (52) which are integrally formed, wherein the first bolt (51) and the second bolt (52) have the same rotation direction and different thread pitches, and the first bolt (51) and the second bolt (52) are correspondingly matched and installed with the nut (21) and the base (1); The diameter of the first bolt (51) is greater than the diameter of the second bolt (52); The double-screw adjustment assembly (5) further comprises a driving member (53) connected to one end of the first bolt (51) or the second bolt (52), wherein the driving member (53) is located on a side of the nut (21) away from the base (1).

10. The fully flexible posture high-precision adjustment two-dimensional platform according to claim 9, characterized in that: The twin-screw adjustment assembly (5) further comprises a motor (6) fixed to the outer end surface of the nut (21), a gear (61) being mounted on the output end of the motor (6), and the gear (61) being matched with the driving member (53).

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