Lens hydrostatic tester

Abstract

The utility model relates to lens testing machine technical field especially relates to a kind of lens static testing machine, including base, the upper end of the base is assembled with support column, the inside of the support column is provided with inner cavity, the inner wall upper end of the inner cavity is fixed with built-in sleeve and penetrates, the inside of the built-in sleeve is rotatably connected with threaded rod, the inner wall lower end of the inner cavity is fixedly installed with built-in seat, the inside of the built-in seat is rotatably installed with the lower end of the threaded rod;The surface of the threaded rod is screw-mounted with threaded sleeve, the inner wall one side of the inner cavity is provided with the limiting hole that penetrates its inside. The threaded rod inside equipment setting can be carried out positive and negative rotation under motor drive, cooperate the synergic effect of threaded sleeve and limiting rod, can accurately convert into the vertical linear motion of extruding head of rotary motion, this kind of straight up and down movement mode effectively avoids partial load or shaking, ensure that pressure is accurately applied in lens center position.

Description

Technical Field

[0001] This utility model relates to the field of lens testing machine technology, and in particular to a lens static pressure testing machine. Background Technology

[0002] In fields such as optics, eyewear manufacturing, automotive glass, architectural glass, and aerospace, the mechanical strength and resistance to deformation of lenses or similar transparent sheets are key indicators to ensure their safety and durability.

[0003] Static pressure testing, as an important method for testing mechanical properties, aims to simulate the continuous static load that lenses may experience in actual use, and to evaluate their ability to resist deformation and failure under constant pressure. For example, Chinese Patent Publication No. CN208860676U provides a lens compression testing machine, which includes a worktable, a pressure application device, and a testing device. A display screen is mounted on the worktable. The pressure application device includes a support frame fixedly mounted on the worktable and a hydraulic cylinder mounted on the support frame. A pressure block is fixedly mounted on the end of the connecting rod of the hydraulic cylinder. The testing device includes a slide rail fixedly mounted on the worktable, two sliding plates slidably mounted on the slide rail, and two laser displacement sensors fixedly mounted on the slide rail. The device provided by this invention is simple to operate, highly efficient, and provides accurate testing.

[0004] Currently, static pressure testing is a crucial method for evaluating the ability of lenses to resist deformation and damage under sustained static loads. Without static pressure testing, it is impossible to accurately understand the pressure resistance of lenses in actual use, potentially leading to deformation, breakage, and other problems that affect their function and safety. High-definition cameras can capture real-time changes in the lens during loading, providing intuitive visual information. Without high-definition cameras, it is impossible to monitor the dynamic processes of lens deformation and crack propagation in real time, making it difficult to fully understand the lens failure mechanism. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a lens static pressure testing machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a lens static pressure testing machine, including a base, a support column is mounted on the upper end of the base, an inner cavity is provided inside the support column, an inner sleeve is fixedly fixed through the upper end of the inner wall of the inner cavity, a threaded rod is rotatably sleeved inside the inner sleeve, an inner seat is fixedly installed on the lower end of the inner wall of the inner cavity, and the lower end of the threaded rod is rotatably installed inside the inner seat. The threaded rod has a threaded sleeve threaded onto its surface. A limiting hole is provided on one side of the inner wall of the inner cavity, penetrating through the cavity. A limiting rod is slidably and tightly fitted inside the limiting hole. One end of the limiting rod is fixedly installed to the outer ring wall of the threaded sleeve, and a pressing head is fixedly installed at the outer end of the limiting rod.

[0007] Preferably, a motor is provided above the support column, the outer ring wall of the motor is fixedly installed on the surface of the support column through a bracket, the motor is provided with a drive shaft inside, and the end of the shaft is fixedly connected to the threaded rod through a coupling.

[0008] Preferably, a mounting plate is fixedly installed on the top of the base, and a base for placing the lens is fixedly installed on the top of the mounting plate, with the center of the base matching the center of the extrusion head.

[0009] Preferably, rod seats are fixedly installed on both sides of the mounting plate, and positioning frames are fixedly installed on the outer ring wall of the rod seats. The positioning frames are L-shaped structures.

[0010] Preferably, a connecting rod is slidably inserted inside the rod base. The connecting rod has a curved rod structure, and a camera is fixedly installed at the end of the connecting rod away from the rod base. The position of the camera lens corresponds to the position of the base.

[0011] Preferably, a positioning sleeve is embedded and fixed inside the positioning frame, a positioning pin is slidably sleeved inside the positioning sleeve, and a spring is wound around the surface of the positioning pin. The two ends of the spring are fixedly installed to the end face of the positioning sleeve and the end of the positioning pin, respectively.

[0012] Preferably, a positioning seat is fixedly installed on the surface of the connecting rod, and the end of the positioning pin away from the spring is slidably inserted into the interior of the positioning seat.

[0013] The design scheme proposed in this utility model has the following beneficial effects in application: 1. This solution utilizes a threaded rod inside the equipment that can rotate in both directions under the drive of a motor. In conjunction with the synergistic effect of the threaded sleeve and the limiting rod, the rotational motion can be precisely converted into the vertical linear motion of the extrusion head. This straight up-and-down motion effectively avoids uneven loading or swaying, ensuring that the pressure is accurately applied to the center of the lens. At the same time, the inner sleeve and the inner seat together ensure the smooth operation of the threaded rod, while the cooperation between the limiting hole and the limiting rod prevents the threaded sleeve from rotating, further improving the control accuracy and repeatability of the entire pressure loading process and providing a stable mechanical environment for lens static pressure testing. 2. This solution uses a high-speed camera installed at the end of the curved connecting rod to acquire real-time images of the lens surface. This high-speed camera system, combined with digital image correlation analysis, can acquire the full-field deformation information of the lens during the entire loading process in a non-contact manner. The system can not only record the displacement distribution of the lens surface, but also accurately analyze the variation law of the strain field. It is particularly suitable for studying the complex deformation behavior of the lens under pressure and the phenomenon of local stress concentration, providing rich data support for a deeper understanding of the mechanical properties of the lens. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the interior of the cavity of this utility model; Figure 3 This is a schematic diagram of the mounting plate structure of this utility model; Figure 4 For the present utility model Figure 3 Enlarged diagram of point A.

[0015] In the diagram: 1. Base; 11. Support column; 12. Inner cavity; 13. Internal sleeve; 14. Threaded rod; 15. Internal seat; 16. Threaded sleeve; 17. Limiting hole; 18. Limiting rod; 19. Extrusion head; 2. Motor; 3. Mounting plate; 31. Base; 32. Rod seat; 33. Connecting rod; 34. Camera; 35. Positioning frame; 301. Positioning sleeve; 302. Positioning pin; 303. Spring; 304. Positioning seat. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-4 A lens static pressure testing machine includes a base 1, a support column 11 mounted on the upper end of the base 1, an inner cavity 12 inside the support column 11, an inner sleeve 13 fixedly inserted through the upper end of the inner wall of the inner cavity 12, a threaded rod 14 rotatably sleeved inside the inner sleeve 13, an inner seat 15 fixedly installed on the lower end of the inner wall of the inner cavity 12, and the lower end of the threaded rod 14 rotatably installed inside the inner seat 15. The threaded rod 14 can rotate stably based on the support column 11 through the inner sleeve 13, and the inner seat 15 can ensure the rotational stability of the threaded rod 14. A threaded sleeve 16 is threaded onto the surface of the threaded rod 14. A limiting hole 17 is provided on one side of the inner wall of the inner cavity 12, penetrating through it. A limiting rod 18 is slidably and tightly mounted inside the limiting hole 17. One end of the limiting rod 18 is fixedly mounted to the outer ring wall of the threaded sleeve 16, and an extrusion head 19 is fixedly mounted on the outer end of the limiting rod 18. When the threaded rod 14 rotates, the threaded sleeve 16 moves, and the limiting rod 18 slides inside the limiting hole 17, which can realize the straight up and down movement of the extrusion head 19.

[0018] The motor 2 is installed above the support column 11. The outer ring wall of the motor 2 is fixedly installed on the surface of the support column 11 through a bracket. The motor 2 has a rotating shaft for driving inside, and the end of the rotating shaft is fixedly connected to the threaded rod 14 through a coupling. The motor 2 is connected to a forward and reverse switch through a wire. When the motor 2 is started, the rotating shaft can rotate in both directions, thereby driving the threaded rod 14 to rotate in both directions.

[0019] The base 1 has a mounting plate 3 fixedly installed on top of it, and a base 31 for placing the lens is fixedly installed on top of the mounting plate 3. The center of the base 31 is matched with the center of the extrusion head 19, and the base 31 can facilitate the stable placement of the lens under static pressure.

[0020] Among them, rod seats 32 are fixedly installed on both sides of the mounting plate 3, and positioning frames 35 are fixedly installed on the outer ring wall of the rod seats 32. The positioning frames 35 have an L-shaped structure, which facilitates the installation of the positioning pins 302.

[0021] The rod 33 is slidably inserted into the rod base 32. The rod 33 is a curved rod structure. A camera 34 is fixedly installed at the end of the rod 33 away from the rod base 32. The lens position of the camera 34 corresponds to the position of the base 31. The camera 34 is a high-speed model. It uses a high-speed camera to capture surface images of the lens during the loading process. The displacement field and strain field of the lens surface are analyzed by image processing technology. The DIC method can provide deformation information of the whole field and is suitable for studying the complex deformation behavior and local stress concentration phenomenon of the lens.

[0022] The positioning frame 35 has a positioning sleeve 301 embedded and fixed inside. The positioning sleeve 301 has a positioning pin 302 slidably connected inside. The surface of the positioning pin 302 is wound with a spring 303. The two ends of the spring 303 are fixedly installed to the end face of the positioning sleeve 301 and the end position of the positioning pin 302, respectively. The spring 303 can ensure the stability of the extension and repositioning of the positioning pin 302.

[0023] The connecting rod 33 is fixedly mounted with a positioning seat 304. The end of the positioning pin 302 away from the spring 303 slides into the positioning seat 304. When the camera 34 needs to be disassembled, the positioning pin 302 is pulled. Through the stretching effect of the spring 303, the positioning pin 302 is separated from the positioning seat 304. Thus, the connecting rod 33 can be separated from the rod seat 32, and the camera 34 can be separated and retrieved.

[0024] Working principle: When motor 2 starts, its internal shaft directly drives the threaded rod 14 to rotate in both directions via a coupling. The threaded rod 14 is stably installed in the inner cavity 12 of the support column 11 through the inner sleeve 13 and the inner seat 15. The inner sleeve 13 is fixed to the upper end of the inner wall of the inner cavity 12, providing upper support for the threaded rod 14, while the inner seat 15 is fixed to the lower end of the inner wall of the inner cavity 12, ensuring the overall stability of the threaded rod 14 during rotation. During the rotation of the threaded rod 14, the threaded sleeve 16, which is threaded with it, undergoes axial displacement. The rotational freedom of the threaded sleeve 16 is constrained so that it can only perform linear motion. A limiting hole 17 is opened on one side of the inner cavity 12. One end of the limiting rod 18 is fixed to the outer ring wall of the threaded sleeve 16, and the other end passes through the limiting hole 17 and is equipped with a pressing head 19. The limiting rod 18 slides in the limiting hole 17, which effectively prevents the threaded sleeve 16 from rotating with the threaded rod 14, thereby converting the rotational motion of the threaded rod 14 into the precise vertical linear motion of the pressing head 19. Finally, the pressing head 19 applies static pressure to the lens placed on the base 31 to complete the test. The lens is stably placed on the base 31 fixed above the mounting plate 3. The center of the base 31 matches the center of the extrusion head 19, ensuring the alignment of the pressure application and the stability of the lens during the static pressure process. In order to monitor the deformation behavior of the lens during the loading process, the equipment is equipped with an image acquisition system based on a high-speed camera. The camera 34 is connected to the rod seat 32 through the connecting rod 33. The rod seat 32 is fixed on both sides of the mounting plate 3, and the connecting rod 33 is a curved rod structure, which allows it to flexibly adjust the viewing angle of the camera 34 to ensure that its lens is accurately aligned with the lens on the base 31. The camera 34 is a high-speed model, which is specifically used to capture the surface image sequence of the lens under pressure. These images are then processed by digital image correlation (DIC) technology to analyze the displacement field and strain field of the lens surface, thereby providing deformation information of the entire field. The camera 34 is positioned by connecting the link 33 to the rod base 32. This connection mechanism is designed for quick disassembly. Specifically, the positioning bracket 35 is fixed to the outer wall of the rod base 32, and a positioning sleeve 301 is embedded inside it. The positioning pin 302 is slidably sleeved inside the positioning sleeve 301, and a spring 303 is wound around its surface. The two ends of the spring 303 are fixed to the end face of the positioning sleeve 301 and the end of the positioning pin 302, respectively. This allows the positioning pin 302 to remain extended in its natural state. The connecting rod 33 is fixed with a positioning seat 304. When installation is required, the connecting rod 33 is inserted into the rod seat 32. The positioning pin 302 is automatically inserted into the positioning seat 304 under the elastic force of the spring 303, thus locking the two together. When the camera 34 needs to be disassembled for maintenance or replacement, simply pull the positioning pin 302 manually to overcome the elastic force of the spring 303 and remove it from the positioning seat 304, thereby separating the connecting rod 33 from the rod seat 32, making it easy to remove and recycle the camera 34 and its connecting rod 33 as a whole. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lens static pressure testing machine, comprising a base (1), characterized in that: The upper end of the base (1) is equipped with a support column (11), the support column (11) is provided with an inner cavity (12), the upper end of the inner wall of the inner cavity (12) is fixed with an inner sleeve (13), the inner sleeve (13) is rotatably sleeved with a threaded rod (14), the lower end of the inner wall of the inner cavity (12) is fixedly installed with an inner seat (15), and the lower end of the threaded rod (14) is rotatably installed with the inner seat (15). The threaded rod (14) is threaded with a threaded sleeve (16). A limiting hole (17) is provided on one side of the inner wall of the inner cavity (12) and extends through it. A limiting rod (18) is slidably and tightly installed inside the limiting hole (17). One end of the limiting rod (18) is fixedly installed with the outer ring wall of the threaded sleeve (16). An extrusion head (19) is fixedly installed on the outer end of the limiting rod (18).

2. The lens static pressure testing machine according to claim 1, characterized in that: A motor (2) is provided above the support column (11). The outer ring wall of the motor (2) is fixedly installed on the surface of the support column (11) through a bracket. The motor (2) has a drive shaft inside, and the end of the shaft is fixedly connected to the threaded rod (14) through a coupling.

3. A lens static pressure testing machine according to claim 2, characterized in that: An mounting plate (3) is fixedly installed above the base (1), and a base (31) for placing lenses is fixedly installed above the mounting plate (3). The center position of the base (31) is matched with the center position of the extrusion head (19).

4. A lens static pressure testing machine according to claim 3, characterized in that: Both sides of the mounting plate (3) are fixedly installed with rod seats (32), and a positioning frame (35) is fixedly installed on the outer ring wall of the rod seat (32). The positioning frame (35) has an L-shaped structure.

5. A lens static pressure testing machine according to claim 4, characterized in that: A connecting rod (33) is slidably inserted inside the rod base (32). The connecting rod (33) is a curved rod structure. A camera (34) is fixedly installed at the end of the connecting rod (33) away from the rod base (32). The position of the lens of the camera (34) corresponds to the position of the base (31).

6. A lens static pressure testing machine according to claim 5, characterized in that: The positioning frame (35) has a positioning sleeve (301) embedded and fixed inside. The positioning sleeve (301) has a positioning pin (302) slidably connected inside. The surface of the positioning pin (302) is wound with a spring (303). The two ends of the spring (303) are fixedly installed to the end face of the positioning sleeve (301) and the end position of the positioning pin (302), respectively.

7. A lens static pressure testing machine according to claim 6, characterized in that: A positioning seat (304) is fixedly installed on the surface of the connecting rod (33), and the end of the positioning pin (302) away from the spring (303) slides into the positioning seat (304).

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