Air floatation platform

Abstract

The utility model provides an air floating platform, and belongs to the technical field of optical element surface shape detection equipment. The air floating platform comprises an air floating plate, an inclination angle adjusting mechanism, a rotating disc and a top clamping structure which are sequentially arranged from bottom to top, multi-angle adjustment is achieved on the premise that the high-precision requirement is guaranteed by adopting the special inclination angle adjusting mechanism, meanwhile, due to the fact that a flat plate type stacking mode from bottom to top is adopted, the height of the whole platform is low, and operation is convenient. The lens clamping device is compact in structure, practical and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical element surface shape detection equipment, and in particular relates to an air floating platform. Background Art

[0002] Optical lenses need to be inspected for surface shape during or after the production process to ensure their plane quality. During this process, the optical lens needs to be placed on a support platform, and then the relative position and angle between the lens to be tested and the standard lens are adjusted through an adjustment mechanism to reduce the detection error. In order to achieve this position and angle adjustment, the existing support platform is often complex in structure, and usually the height of the support platform is high, which makes it inconvenient to clamp and install the lens. This problem is particularly prominent for large-diameter lenses (for example, for many large-diameter plane mirrors, the mirror body weighs hundreds of kilograms); in addition, the adjustment mechanism of the existing support platform generally adjusts the angle directly, with low accuracy.

[0003] For example, Chinese patent ZL201310585997.7 discloses a method and device for detecting the surface error of a large-aperture and large-relative-aperture parabolic reflector. The adjustment mechanism of the parabolic reflector 1 to be measured includes an X-axis motion adjustment platform, a Y-axis motion adjustment platform, a tilt adjustment platform in the XOY plane, a C-axis rotating table rotating around the optical axis of the parabolic reflector to be measured, and a focusing motion assembly of the parabolic reflector to be measured. Although the detection device involved in the patent can be adjusted in all directions, its adjustment angle and distance are limited, and the installation and clamping of its lens are very inconvenient. Its tilt angle can only be adjusted on the XOY plane, and its accuracy is limited. For another example, Chinese patent ZL 202011280227.8 discloses a device and method for absolute inspection of a large-aperture plane interferometer by rotation and translation method. Its lens can only flip around the flip axis and translate along the translation mechanism. Its adjustment parameters are limited, and it also faces the problem of inconvenient installation and clamping.

[0004] In view of this, the present utility model is proposed. Summary of the invention

[0005] The utility model aims to provide an air floating platform, the purpose of which is to solve at least one of the above problems, facilitate the installation and adjustment of large-diameter lenses, meet high-precision requirements, and facilitate maintenance.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] The cam is an air-floating platform, which includes an air-floating plate, a tilt adjustment mechanism, a turntable and a top clamping structure which are arranged in sequence from bottom to top, wherein the tilt adjustment mechanism includes a first adjusting plate, a second adjusting plate, a hinge, a fixed block, a first screw rod and a sliding bar. The first adjusting plate and the second adjusting plate are stacked in an up-and-down direction and are connected by a hinge on the front side. The first adjusting plate and the second adjusting plate are rotatably connected by a hinge. A fixed block is fixedly arranged in the middle of the rear side of the first adjusting plate, and a first screw rod is rotatably arranged in the middle of the rear side of the second adjusting plate in a vertical direction. The bottom end of the first screw rod abuts against the top surface of the fixed block. When the first screw rod is rotated, it can be extended and retracted in the vertical direction, thereby allowing the second adjusting plate to rotate with the first adjusting plate around the hinge; a sliding bar is arranged at the bottom of the first adjusting plate, and the tilt adjustment mechanism is slidably arranged on the air-floating plate in a front-and-rear direction through the sliding bar, and a turntable is arranged on the top of the second adjusting plate, and the top clamping structure is fixedly arranged on the top of the turntable, and a lens is clamped on the top clamping structure.

[0008] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0009] By adopting a special tilt adjustment mechanism, multi-angle adjustment is achieved while ensuring high precision requirements. At the same time, due to the use of a flat-plate stacking method from bottom to top, the height of the entire platform is relatively low, which can facilitate the installation and clamping of the lens. The clamping bottom plate and the upper support plate and columns for clamping the lens are detachable, which is convenient for replacement when targeting lenses of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the air flotation platform of the utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of the air floating platform of the utility model;

[0013] Figure 3 It is a schematic diagram of the top view of the air flotation platform of the utility model;

[0014] Figure 4 It is a schematic diagram of the top view of the air flotation platform of the utility model without the top clamping structure;

[0015] Figure 5 It is a side view structural schematic diagram of the tilt angle adjustment mechanism used in the utility model;

[0016] Figure 6 yes Figure 2A partial enlarged view of the middle A area;

[0017] Among them, 1-air floating plate, 2-tilt adjustment mechanism, 3-turntable, 4-support plate, 5-clamping bottom plate, 6-mirror seat, 7-column, 8-clamping block, 9-screw structure, 10-lens, 11-first driving mechanism, 12-gear, 13-second driving mechanism, 14-handle,

[0018] 101-Slide rail,

[0019] 201-first adjustment plate, 202-second adjustment plate, 203-hinge, 204-fixed block, 205-first screw rod, 206-sliding bar,

[0020] 901-hand wheel, 902-first support platform, 903-slider, 904-second screw rod, 905-second support platform, 906-connecting part, 907-locking unit. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0022] Examples, such as Figures 1 to 6 As shown, the utility model provides an air floating platform, which includes an air floating plate 1, an inclination adjustment mechanism 2, a turntable 3 and a top clamping structure arranged in sequence from bottom to top, wherein, see Figure 5 The tilt adjustment mechanism 2 includes a first adjustment plate 201, a second adjustment plate 202, a hinge 203, a fixed block 204, a first screw rod 205 and a sliding bar 206. The first adjustment plate 201 and the second adjustment plate 202 are stacked in the vertical direction (they can be close to each other or as shown in FIG. Figure 5As shown in the figure, there is a gap), the first adjustment plate 201 and the second adjustment plate 202 are rotatably connected at the front side by a hinge 203, a fixed block 204 is fixedly provided in the middle of the rear side of the first adjustment plate 201, and a first screw rod 205 arranged in the vertical direction is rotatably provided in the middle of the rear side of the second adjustment plate 202, the bottom end of the first screw rod 205 abuts against the top surface of the fixed block 204, and the first screw rod 205 can achieve telescopic expansion in the vertical direction when rotating (this telescopic expansion is achieved by the rotation of the screw rod itself, for example For example, when the screw is rotated, the screw is screwed in or out of the workpiece), thereby causing the second adjustment plate 202 to rotate with the first adjustment plate 201 around the hinge 203; a sliding bar 206 is provided at the bottom of the first adjustment plate 201, and the inclination adjustment mechanism 2 is slidably set on the air floating plate 1 along the front-to-back direction through the sliding bar 206, and a turntable 3 is provided on the top of the second adjustment plate 202, and a top clamping structure is fixedly set (preferably detachably fixed) on the top of the turntable 3, and a lens 10 is clamped on the top clamping structure.

[0023] It should be noted that in the prior art, the adjustment mechanism of the support platform generally directly adjusts the angle when adjusting the angle, which has low adjustment accuracy and can only achieve single angle adjustment. The utility model adopts the form of a first adjustment plate 201 and a second adjustment plate 202. When the first screw rod 205 rotates, it can make the first adjustment plate 201 and the second adjustment plate 202 rotate around the hinge 203. For example, Figure 5 The first adjustment plate 201 and the second adjustment plate 202 are shown in a parallel state, but as the first screw 205 rotates, the two will have an inclination angle. In this way, the top clamping structure placed above the second adjustment plate 202 and the lens 10 clamped therein can produce corresponding angle changes, completing, for example, the inclination adjustment in the front-back direction; and because the first screw 205 is adjusted in the vertical direction to adjust the inclination, it is more accurate and stable than the existing direct angle adjustment method. In addition, since the top clamping structure is placed on the turntable 3, as the turntable 3 rotates, it can achieve rotation adjustment around the central axis direction of the turntable 3, thus achieving multi-angle adjustment.

[0024] In a preferred embodiment, the hinge used is a clamp-type hinge, for example, a hinge is formed by a pin, a bolt, a pin shaft, etc. The hinge is preferably two hinges arranged in the left and right directions (see Figure 2 ).

[0025] In a preferred embodiment, a plurality of (for example, 3, 4 or more) air-floating shock absorbers (not shown in the figure) are arranged at the bottom of the air-floating plate 1. The purpose of the air-floating shock absorbers is to adjust the air-floating plate 1 to a horizontal state and improve the stability of the entire platform.

[0026] In a preferred embodiment, a first driving mechanism 11 is fixedly arranged on the left or right side of the second adjustment plate 202, and a gear 12 is rotatably arranged on the top of the second adjustment plate 202, the gear 12 is meshed with the teeth on the circumference of the turntable 3, and the first driving mechanism 11 drives the gear 12 to rotate and then drives the turntable 3 to rotate. In this way, the rotation adjustment around the central axis direction of the turntable 3 can be achieved. It should be noted that the gear 12 and the turntable 3 are provided with corresponding rotation axes (not shown in the figure) on the second adjustment plate 202, which belongs to the prior art and will not be described in detail.

[0027] Further preferably, the top surface of the gear 12 is lower than the top surface of the turntable 3, so that there is a gap between the top clamping structure and the top surface of the gear 12. Since the top clamping structure is fixed to the top surface of the turntable 3, through such a setting, the gear 12 can avoid affecting the top clamping structure during rotation, ensuring the smooth operation of the platform.

[0028] In a preferred embodiment, a second driving mechanism 13 is fixedly disposed on the rear side of the second adjusting plate 202 , and the second driving mechanism 13 is used to drive the first screw rod 205 to rotate and realize extension and retraction in the vertical direction.

[0029] It should be noted that the first driving mechanism 11 and the second driving mechanism 13 used in the present invention can be manually driven or electrically driven, for example, by a hand wheel, a motor, etc.

[0030] Preferably, there are at least two sliding bars 206 at the bottom of the first adjustment plate 201 arranged along the front-to-back direction, and the air floating plate 1 is correspondingly provided with a slide rail 101 arranged along the front-to-back direction. The right side or left side of the first adjustment plate 201 is connected with a screw structure 9, and the screw structure 9 is used to drive the inclination adjustment mechanism 2 to slide along the front-to-back direction (through the first adjustment plate 201).

[0031] In a preferred embodiment, the screw rod structure 9 includes a handwheel 901, a first support platform 902, a slider 903, a second screw rod 904, a second support platform 905 and a connecting portion 906. The first support platform 902 and the second support platform 905 are arranged opposite to each other in the front-to-back direction. The second screw rod 904 is straddled on the first support platform 902 and the second support platform 905 in the front-to-back direction, and one end of the second screw rod 904 extends through the first support platform 902 or the second support platform 905, and the one end extending through the first support platform 902 or the second support platform 905 is fixedly connected to the handwheel 901. The slider 903 is arranged between the first support platform 902 and the second support platform 905. A thread matching the second screw rod 904 is arranged in the middle of the slider 903. The slider 903 is fixedly connected to the right side or left side of the second adjustment plate 202 through the connecting portion 906. With such an arrangement, when the hand wheel 901 is turned, the second screw rod 904 rotates and drives the slider 903 to move in the front-rear direction, and then drives the inclinometer mechanism 2 to slide in the front-rear direction through the fixed connection portion 906. In order to make the structure compact, the screw rod structure 9 and the first drive mechanism 11 are arranged opposite to each other. For example, when the screw rod structure 9 is located on the left side, the first drive mechanism 11 is located on the right side.

[0032] Further preferably, the screw rod structure 9 further includes a locking unit 907 for locking the second screw rod 904 at a predetermined position, for example, by rotating a bolt to achieve tightening.

[0033] Preferably, a plurality of handles 14 are provided on the air flotation plate 1 to facilitate the transportation of the air flotation platform.

[0034] In a preferred embodiment, the top clamping structure includes a support plate 4, a clamping base plate 5, a lens seat 6, a column 7 and a clamping block 8. The top clamping structure is fixedly arranged on the top of the turntable 3 through the support plate 4. The clamping base plate 5 is detachably fixedly arranged on the upper middle part of the support plate 4. Two columns 7 are symmetrically arranged on the upper side of the clamping base plate 5 along the left and right directions. A lens seat 6 is arranged between the two columns 7. Clamping blocks 8 are arranged on the two columns 7 in opposite directions. The clamping blocks 8 are adjustable in the left and right directions (for example, by tightening nuts, etc.). In this way, when the lens 10 needs to be clamped, the lens 10 is first placed on the lens seat 6, and then the clamping block 8 is rotated and adjusted so that the left and right ends of the lens 10 are clamped by the clamping block 8. It should be noted that, since the actual range of the tilt angle that needs to be adjusted is small when adjusting the tilt angle, this clamping method can well meet the actual needs. Since this three-point fixing method is adopted, it is convenient to clamp and install the lens, and the operation is simplified. In addition, since the support plate 4 and the clamping base plate 5 are detachable, when lenses 10 of different sizes are required, it is only necessary to remove the clamping base plate 5 and the columns thereon as a whole and then replace the whole with columns 7 with different spacings.

[0035] In order to better achieve the purpose of the present invention, a flexible material is provided on one side of the clamping block 8 facing the lens 10. This is to avoid damage to the lens 10 during clamping.

[0036] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An air flotation platform, comprising an air flotation plate (1), an inclination adjustment mechanism (2), a turntable (3) and a top clamping structure arranged in sequence from bottom to top, characterized in that: The tilt angle adjustment mechanism (2) comprises a first adjustment plate (201), a second adjustment plate (202), a hinge (203), a fixed block (204), a first screw rod (205) and a sliding bar (206); the first adjustment plate (201) and the second adjustment plate (202) are arranged to overlap in the vertical direction; the first adjustment plate (201) and the second adjustment plate (202) are rotatably connected at the front side via the hinge (203); a fixed block (204) is fixedly arranged in the middle of the rear side of the first adjustment plate (201); a first screw rod (205) arranged in the vertical direction is rotatably arranged in the middle of the rear side of the second adjustment plate (202); The bottom end of a threaded rod (205) abuts against the top surface of a fixed block (204); the first threaded rod (205) can be extended and retracted in a vertical direction when rotating, thereby causing the second adjustment plate (202) to rotate with the first adjustment plate (201) around the hinge (203); a sliding bar (206) is provided at the bottom of the first adjustment plate (201); the inclination adjustment mechanism (2) is slidably arranged on the air floating plate (1) in a front-rear direction via the sliding bar (206); a rotating disk (3) is provided at the top of the second adjustment plate (202); a top clamping structure is fixedly arranged on the top of the rotating disk (3); and a lens (10) is clamped on the top clamping structure.

2. An air flotation platform as claimed in claim 1, characterized in that: A first driving mechanism (11) is fixedly arranged on the left or right side of the second adjusting plate (202), and a gear (12) is rotatably arranged on the top of the second adjusting plate (202), the gear (12) being meshed with teeth on the circumference of the rotating disk (3), and the first driving mechanism (11) drives the gear (12) to rotate, thereby driving the rotating disk (3) to rotate.

3. An air floating platform as claimed in claim 2, characterized in that: The top surface of the gear (12) is lower than the top surface of the rotating disk (3), so that there is a gap between the top clamping structure and the top surface of the gear (12).

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