An angle fine-tuning mechanism

Abstract

The present invention discloses an angle fine-tuning mechanism, which includes a yielding wheel. The yielding wheel is installed on an installation platform. The central wheel body of the yielding wheel and the installation platform are fixed as a stationary base body of "non-deformation". The yielding outer ring and the spokes are connected to the central wheel body. The load platform is connected to the yielding outer ring. The grating detection head is installed on one side of the yielding outer ring. The fixed plate, piezoelectric ceramic, top block, motor fixing head, and motor constitute the driving part of the fine-tuning mechanism and are installed on the left side of the yielding wheel. The piezoelectric ceramic is fixed to the installation platform through the fixed plate, and the motor is fixed to the installation platform through the motor fixing head. The installation guide rail, microswitch, bolt seat, retaining piece, and connecting piece constitute the limiting part. The present invention can achieve high-precision angle adjustment and strong anti-vibration ability, and this mechanism can work in a vacuum environment better than 1×10 ‑7 Torr and ensure accurate displacement, precise positioning, and extremely high precision.

Description

Technical Field

[0001] The present invention relates to the technical field of angle fine-tuning mechanisms, and particularly to an angle fine-tuning mechanism. Background Art

[0002] Currently, the mainstream angle adjustment mechanisms can only be achieved through motors or piezoelectric ceramics, which can meet the conventional angle adjustment requirements. However, for mechanisms with higher precision adjustment requirements, they cannot meet such needs.

[0003] In CN104500673A, in this case, a guide rod, a sliding groove and a ball screw are used to convert the horizontal thrust of the motor into angle adjustment. However, only using the ball screw to adjust its precision cannot meet the requirements of high-precision optical instruments, and it cannot carry heavy objects. Summary of the Invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide an angle fine-tuning mechanism. Through the structure of the yielding wheel, it can achieve high-precision angle adjustment, strong anti-vibration ability, and this mechanism can work in a vacuum environment better than 1×10 -7 Torr and ensure accurate displacement, precise positioning and extremely high precision.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] An angle fine-tuning mechanism includes a mounting platform 1, a yielding wheel 2, a load platform 3, a grating detection head 4, a fixing plate 5, a piezoelectric ceramic 6, a top block 7, a motor fixing head 8, a motor 9, a mounting guide rail 10, a micro switch 11, a bolt seat 12, a retaining piece 13 and a connecting piece 14;

[0007] The yielding wheel 2 is mounted on the mounting platform 1. The central wheel body 16 of the yielding wheel 2 and the mounting platform 1 are fixed as a stationary base that "does not deform". The yielding outer ring 15 and the spokes 17 are connected to the central wheel body 16. The load platform 3 is connected to the yielding outer ring 15, and the grating detection head 4 is mounted on one side of the yielding outer ring 15;

[0008] The fixing plate 5, the piezoelectric ceramic 6, the top block 7, the motor fixing head 8 and the motor 9 constitute the driving part of the fine-tuning mechanism, which is mounted on the left side of the yielding wheel 2. The piezoelectric ceramic 6 is fixed to the mounting platform 1 through the fixing plate 5, and the motor 9 is fixed to the mounting platform 1 through the motor fixing head 8;

[0009] The mounting guide rail 10, the micro switch 11, the bolt seat 12, the retaining piece 13 and the connecting piece 14 constitute the limiting part.

[0010] The yielding wheel 2 includes a yielding outer ring 15, a central wheel body 16 and spokes 17. The spokes 17 and the central wheel body 16 of the yielding outer ring 15 are connected by flexible hinges.

[0011] The yield wheel 2 is symmetrically provided with A structures on the left and right, and the A structures are used to connect to the top block 7, and symmetrically provided with B structures on the top and bottom, and the B structures are connected to the connecting member 14.

[0012] On the left side of the top block 7 is the motor-driven (coarse adjustment) part. The motor fixing head 8 is connected to the mounting platform 1, the motor 9 is fixed through the motor fixing head 8. On the right side of the top block 7 is the motor-driven (fine adjustment) part. The fixing plate 5 is connected to the mounting platform 1, and the piezoelectric ceramic 6 is fixed through the fixing plate 5. The motor 9 and the piezoelectric ceramic 5 push the top block 7 to provide a tangential external force in the circumferential direction of the yield wheel 2. Under the action of the external force, the flexible hinge connecting the spoke 17 and the yield outer ring 15 will deform, and the deformation of the flexible hinge will cause the yield outer ring 15 to generate a small angle of rotation around the axis, driving the load platform 3 to complete the angle adjustment.

[0013] The baffle 13 is connected to the yield wheel 2 through the connecting member 14 and moves as the yield wheel 2 rotates. The microswitches 11 on both sides of the baffle 13 play an electrical limit role, and the limit range is adjusted through the mounting guide rail 10. The bolt seats 12 are located on both sides of the connecting member 14 and play a mechanical limit role.

[0014] Both sides of the connecting member 14 are provided with bolt seats 12, and mechanical limit is realized through bolts. The stroke of the mechanical limit is realized by adjusting the bolts; the distance between the two microswitches 11 is adjusted through the mounting guide rail 10 to realize the adjustment of the electrical limit stroke.

[0015] Advantages of the present invention:

[0016] In the present invention, the accuracy of angle adjustment is higher and the anti-vibration ability is stronger.

[0017] In the present invention, coarse adjustment is first realized through the motor and the ball screw pair, and then fine adjustment is carried out through the piezoelectric ceramic. The principle is that the flexible hinge is deflected by the push of the motor and the piezoelectric ceramic, driving the rotation of the load platform to realize angle fine adjustment.

[0018] The present invention realizes high-resolution adjustment of the angle. The displacement of the motor and the piezoelectric ceramic is converted into high-resolution angle adjustment by using the flexible structure of the yield wheel. The characteristic of motor drive is large displacement stroke. Therefore, the motor is set as a coarse adjustment mechanism, which can quickly adjust the angle to near the set range; the characteristic of piezoelectric ceramic drive is high resolution. After the motor drives to near the adjustment range, the piezoelectric ceramic drive is used to reach the set position to realize the adjustment of the set angle. At the same time, the load platform is installed on the yield wheel in the form of a semi-circular surface to obtain higher stability. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is the top view of the present invention.

[0021] Figure 3 This is a schematic diagram of the yield wheel of the present invention.

[0022] Figure 4 This is a schematic diagram of the yield wheel of the present invention.

[0023] Figure 5 This is a schematic diagram of the motor drive structure.

[0024] Figure 6 This is a schematic diagram of the electrical limit structure. Detailed implementation manners

[0025] The present invention will be further described in detail below in conjunction with embodiments.

[0026] As Figures 1 - 6 shown, the present invention is an angle fine-tuning mechanism, which mainly consists of an installation platform 1, a yield wheel 2, a load platform 3, a grating detection head 4, a fixing plate 5, a piezoelectric ceramic 6, a top block 7, a motor fixing head 8, a motor 9, an installation guide rail 10, a micro switch 11, a bolt seat 12, a retaining piece 13 and a connecting piece 14.

[0027] Among them, the yield wheel 2 is as Figure 3 shown, and is composed of 12 "spokes 17" with flexible hinges designed at both ends to connect the central wheel body and the yield outer ring 15, and the central wheel body 16 and the installation platform 1 are fixed as a stationary matrix of "non-deformation". When the outer ring of the yield wheel receives a tangential external force in the circumferential direction, while the flexible hinge deforms, it will cause the yield outer ring 15 to generate a small angle of rotation around the axis. The fine adjustment of the angle can be realized by using the small deformed angle.

[0028] The load platform 2 will rotate along with the rotation of the yield outer ring 15. To achieve the purpose of adjusting the angle.

[0029] The grating detection head 4 is fixed on the installation platform 1 and is used to detect the deflection angle of the yield wheel 2 for detection purposes. The grating head measures the grating scale attached to the yield wheel 2 for angle detection, and the collected parameters are fed back to the display screen through the control system. It mainly uses the functions of the grating head itself for detection.

[0030] The drive part consists of a fixing plate 5, a piezoelectric ceramic 6, a top block 7, a motor fixing head 8, and a motor 9. The piezoelectric ceramic 6 is installed on the installation platform 1 through the fixing plate 5, and the motor 9 is installed on the installation platform 1 through the motor fixing head 8. The piezoelectric ceramic 6 and the motor 9 cause the yield wheel 2 to deform by pushing the top block 7.

[0031] The limiting device consists of a mounting guide rail 10, a microswitch 11, a bolt seat 12, a retaining piece 13 and a connecting piece 14. The microswitch 11 can adjust the distance through the mounting guide rail 10 to achieve the effect of scaling and limiting. The retaining piece 13 is connected to the yield wheel 2 through the connecting piece 14, and the function of the bolt seat 12 is mechanical limiting.

[0032] The working principle of the present invention:

[0033] When the outer ring 15 of the yield wheel receives a tangential external force in the circumferential direction, while the flexible hinge deforms, it will cause the outer yield ring 15 to generate a small angle of rotation around the axis. By using the small deformed angle, the carrying platform 2 can be changed as the angle changes, achieving the purpose of adjusting the angle.

Claims

1. An angle fine-tuning mechanism, characterized in that, It includes an installation platform (1), a yield wheel (2), a load platform (3), a grating detection head (4), a fixing plate (5), a piezoelectric ceramic (6), a top block (7), a motor fixing head (8), a motor (9), an installation guide rail (10), a microswitch (11), a bolt seat (12), a retaining piece (13) and a connecting piece (14); The yield wheel (2) is installed on the installation platform (1). The central wheel body (16) of the yield wheel (2) and the installation platform (1) are fixed as a stationary base of "non-deformation". The yield outer ring (15), the spokes (17) are connected to the central wheel body (16). The load platform (3) is connected to the yield outer ring (15). The grating detection head (4) is installed on one side of the yield outer ring (15); The fixing plate (5), the piezoelectric ceramic (6), the top block (7), the motor fixing head (8), and the motor (9) constitute the driving part of the fine adjustment mechanism and are installed on the left side of the yield wheel (2). The piezoelectric ceramic (6) is fixed to the installation platform (1) through the fixing plate (5). The motor (9) is fixed to the installation platform (1) through the motor fixing head (8); The installation guide rail (10), the microswitch (11), the bolt seat (12), the retaining piece (13) and the connecting piece (14) constitute the limiting part; The yield wheel (2) includes a yield outer ring (15), a central wheel body (16) and spokes (17). The spokes (17) and the central wheel body (16) of the yield outer ring (15) are connected by a flexible hinge; On the left side of the top block (7) is the coarse adjustment part driven by the motor. The motor fixing head (8) is connected to the installation platform (1), and the motor (9) is fixed through the motor fixing head (8). On the right side of the top block (7) is the fine adjustment part driven by the piezoelectric ceramic. The fixing plate (5) is connected to the installation platform (1), and the piezoelectric ceramic (6) is fixed through the fixing plate (5). The motor (9) and the piezoelectric ceramic (6) push the top block (7) to provide a tangential external force in the circumferential direction of the yield wheel to the yield wheel. Under the action of the external force, the flexible hinge connecting the spokes (17) and the yield outer ring (15) will deform, and the deformation of the flexible hinge will cause the yield outer ring (15) to generate a small angle of rotation around the axis, driving the load platform (3) to complete the angle adjustment; The retaining piece (13) is connected to the yield wheel (2) through the connecting piece (14) and moves as the yield wheel (2) rotates. The microswitches (11) on both sides of the retaining piece (13) play the role of electrical limit. The limit range is adjusted through the installation guide rail (10). The bolt seats (12) are located on both sides of the connecting piece (14) and play the role of mechanical limit.

2. The angle fine-tuning mechanism according to claim 1, characterized in that, The A structure is symmetrically arranged on the left and right of the yield wheel (2), and the A structure is used to connect to the top block (7). The B structure is symmetrically arranged on the top and bottom and is connected to the connecting piece (14).

3. The angle fine-tuning mechanism according to claim 1, characterized in that There are bolt seats (12) on both sides of the connecting piece (14), and mechanical limit is realized through bolts. The stroke of the mechanical limit is realized by adjusting the bolts; the distance between the two microswitches (11) is adjusted through the installation guide rail (10) to realize the adjustment of the electrical limit stroke.

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