An edge uniform force clamping device of a lens hydrostatic testing machine

Abstract

The utility model relates to a lens production technical field discloses an edge even stress clamping device of lens static pressure testing machine, including bottom stand, the bottom stand upper end surface one side fixedly connected with the lifting platform, the movable end fixed mounting of lifting platform has the depressor, the bottom stand inboard is provided with the accommodation cavity, the inboard of accommodation cavity is provided with the clamping assembly for fixing lens, the bottom stand upper end surface annular array is provided with four rectangle slide mouth, be provided with the work disc between four rectangle slide mouth, the work disc fixedly connected in the bottom stand upper end surface, clamping assembly carries out the clamping fixed operation to lens through the rigid linkage structure of cylinder, sliding rod, fixed base and pull rod, and when the cylinder piston rises, four pull rods synchronous push the clamping rod to the center and draw close, ensure that the moving distance of each clamping rod is consistent, avoid the unilateral clamping too tight problem caused by traditional manual adjustment or non linkage structure, guarantee lens edge stress even from the mechanical structure.

Description

Technical Field

[0001] This utility model relates to the field of lens manufacturing technology, specifically to a lens static pressure testing machine with edge uniform force clamping device. Background Technology

[0002] In the lens manufacturing industry, static pressure testing is a crucial step in evaluating the lens's resistance to breakage and its deformation limit, directly impacting the lens's safety and durability after it leaves the factory. Especially in the batch testing of lenses made of different materials such as resin and glass, a static pressure testing machine is used to apply controllable static pressure to the lenses, simulating the external forces such as compression and impact that the lenses might experience in daily use. This allows for accurate acquisition of the lens's static pressure resistance indicators. During static pressure testing, the way the lens is clamped and fixed is a core factor determining the accuracy of the test results. If the force on the lens edges is uneven during clamping, it can easily lead to localized pressure concentration, causing the lens to break before reaching its true static pressure resistance limit. Alternatively, clamping misalignment can cause the pressure point of the pressure device to deviate from the center of the lens, resulting in distorted test data that cannot provide a reliable basis for lens quality assessment.

[0003] Existing devices have several drawbacks in use. For example, most current technologies employ a "two-point clamping" or "single-sided manual adjustment clamping" structure. This involves using two opposing manual screws to drive the clamping claws to fix the lens edge. Such structures rely on manual adjustment of the screw spacing, making it impossible to guarantee that the movement distance of the two clamping claws is completely consistent. This easily leads to problems such as "one-sided clamping being too tight" or "one-sided clamping being too loose." The overly tight side will cause additional pressure on the lens edge, potentially causing premature lens breakage (non-testing damage). The overly loose side cannot provide stable clamping, and the lens is prone to shifting during testing. This causes the pressure applied by the pressure reducer to deviate from the center, ultimately resulting in a significant deviation between the "static pressure resistance performance data" obtained from the lens's actual performance, failing to accurately reflect the lens quality. Utility Model Content

[0004] The purpose of this invention is to provide a lens static pressure testing machine with a uniformly force-bearing clamping device at the edge, which solves the problems of poor clamping uniformity and large testing errors.

[0005] This utility model provides the following technical solution: a lens static pressure testing machine edge uniform force clamping device, including a base platform, a lifting platform fixedly connected to one side of the upper surface of the base platform, a pressure reducer fixedly installed at the movable end of the lifting platform, a receiving cavity opened inside the base platform, a clamping component for fixing the lens is provided inside the receiving cavity, four rectangular sliding mouths are arranged in a circular array on the upper surface of the base platform, a working plate is arranged between the four rectangular sliding mouths, and the working plate is fixedly connected to the upper surface of the base platform.

[0006] As a preferred embodiment of the above technical solution, the clamping assembly includes multiple support rods fixedly installed on the bottom wall of the receiving cavity. A support plate is fixedly connected to the top of each of the multiple support rods. A linkage clamping rod is rotatably connected to each of the four side walls of the support plate. A slot is opened at the middle of each of the four linkage clamping rods. A cylinder is fixedly installed on the bottom wall of the receiving cavity. A sliding rod is fixedly connected to the piston end of the cylinder. The top of the sliding rod passes through the support plate and a fixed seat is fixedly sleeved on its top outer wall. Multiple pull rods are arranged in a circular array on the outer wall of the fixed seat. The multiple pull rods are rotatably connected to the fixed sleeve through a rotating shaft. The tops of the multiple pull rods are inserted into the slots and rotatably connected to the linkage clamping rods through a rotating shaft.

[0007] As a preferred embodiment of the above technical solution, the tops of the four linkage clamping rods slide within the corresponding rectangular sliding openings.

[0008] As a preferred embodiment of the above technical solution, anti-slip pads are glued and fixed to the top sidewalls of the four linkage clamping rods.

[0009] As a preferred embodiment of the above technical solution, a control panel is provided on one side of the base platform, and a control button is provided on the other side of the base platform.

[0010] As a preferred embodiment of the above technical solution, a door for sealing the receiving cavity is hinged to one side of the base platform.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the clamping assembly clamps and fixes the lens through a rigid linkage structure of a cylinder, a sliding rod, a fixed seat, and a pull rod. When the cylinder piston rises, the four pull rods simultaneously push the clamping rods toward the center, ensuring that the movement distance of each clamping rod is consistent. This avoids the problem of excessive clamping on one side caused by traditional manual adjustment or non-linkage structures, and ensures uniform force on the lens edge from a mechanical structure perspective. Attached Figure Description

[0012] Figure 1 A first-view three-dimensional structural diagram of a lens static pressure testing machine with edge-uniformly stressed clamping device. Figure 2 This is a schematic diagram of the internal structure of the cavity; Figure 3 This is an enlarged structural schematic diagram of the clamping assembly; Figure 4 This is a second-view three-dimensional structural diagram of a lens static pressure testing machine with a uniformly stressed edge clamping device.

[0013] In the diagram: 1. Base platform; 11. Lifting platform; 12. Presser; 13. Receiving cavity; 14. Rectangular slide; 15. Working plate; 16. Control panel; 17. Control button; 18. Door body; 2. Clamping assembly; 21. Support rod; 22. Support plate; 23. Linkage clamping rod; 231. Anti-slip pad; 24. Groove; 25. Cylinder; 26. Sliding rod; 27. Fixed seat; 28. Pull rod. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] Example like Figures 1-4 As shown, this utility model provides a technical solution: a lens static pressure testing machine edge uniform force clamping device, including a base 1, a lifting platform 11 fixedly connected to one side of the upper end face of the base 1, a lowering device 12 fixedly installed on the movable end of the lifting platform 11, a receiving cavity 13 opened inside the base 1, a clamping component 2 for fixing the lens is arranged inside the receiving cavity 13, four rectangular sliding mouths 14 are arranged in a circular array on the upper end face of the base 1, a working plate 15 is arranged between the four rectangular sliding mouths 14, and the working plate 15 is fixedly connected to the upper end of the base 1. On one side of the base platform 1, there is a control panel 16, and on the other side of the base platform 1, there is a control button 17. In actual use, the lens to be tested is placed stably in the center of the working plate 15. The clamping assembly 2 is started by the control button 17. The clamping assembly 2 clamps the lens. Then, the lifting platform 11 is started by the control button 17. The lifting platform 11 drives the pressure lowering device 12 to slowly descend until the pressure end face of the pressure lowering device 12 is in stable contact with the center of the upper surface of the lens. The pressure lowering device 12 applies static pressure to the lens according to the preset parameters.

[0016] As one implementation method in this embodiment, such as Figure 3As shown, the clamping assembly 2 includes multiple support rods 21 fixedly installed on the bottom wall of the receiving cavity 13. A support plate 22 is fixedly connected to the top of each support rod 21. Linkage clamping rods 23 are rotatably connected to the four side walls of the support plate 22. Each of the four linkage clamping rods 23 has a slot 24 at its middle end. The tops of the four linkage clamping rods 23 slide within corresponding rectangular sliding openings 14. Anti-slip pads 231 are adhered and fixed to the top side walls of each of the four linkage clamping rods 23. A cylinder 25 is fixedly installed on the bottom wall of the receiving cavity 13. A sliding rod 26 is fixedly connected to the piston end of the cylinder 25. The top of the sliding rod 26 passes through the support plate 22, and a fixed seat 27 is fixedly sleeved on its top outer wall. Multiple pull rods 28 are arranged in a circular array on the outer wall of the fixed seat 27. All 8 are rotatably connected to the fixed sleeve via a rotating shaft. The tops of multiple pull rods 28 are inserted into the slots 24 and rotatably connected to the linkage clamping rods 23 via rotating shafts. In actual use, when the control switch of the clamping assembly 2 is turned on, the piston of the cylinder 25 retracts downward under the action of air pressure, driving the sliding rod 26 to move downward along the through hole of the support plate 22. The fixed seat 27 moves down synchronously with the sliding rod 26, and the pull rods 28 in the ring array on its outer wall rotate synchronously. Under the pulling force of the pull rods 28, the top of the linkage clamping rod 23 moves synchronously towards the edge of the lens along the rectangular sliding opening 14. When the anti-slip pad 231 on the top of the linkage clamping rod 23 contacts the edge of the lens, the cylinder 25 continues to maintain a stable air pressure, and the anti-slip pad 231 fits tightly against the lens (to prevent the lens from rotating during testing), and the clamping is completed.

[0017] As one implementation method in this embodiment, such as Figure 4 As shown, a door 18 for sealing the receiving cavity 13 is hinged to one side of the base 1. The door 18 is used to protect the internal instruments from being invaded by rats and can easily open and close the receiving cavity 13, facilitating quick maintenance of the clamping assembly 2.

[0018] Working principle: During use, place the lens to be tested stably in the center of the working plate 15, and activate the control switch of the clamping assembly 2. The piston of the cylinder 25 retracts downward under air pressure, causing the sliding rod 26 to move downward along the through hole of the support plate 22. The fixed seat 27 moves downward synchronously with the sliding rod 26, and the pull rods 28 in the annular array on its outer wall rotate synchronously. Under the pulling force of the pull rods 28, the top of the linkage clamping rod 23 moves synchronously towards the edge of the lens along the rectangular sliding opening 14. When the anti-slip pad 231 on the top of the linkage clamping rod 23 contacts the edge of the lens, the cylinder 25 continues to maintain a stable air pressure to prevent slippage. The pad 231 is tightly fitted to the lens (to prevent the lens from rotating during testing). Once clamping is complete, the lifting platform 11 is started. The lifting platform 11 drives the pressure reducer 12 to slowly descend until the pressure-applying end face of the pressure reducer 12 makes stable contact with the center of the upper surface of the lens. The pressure reducer 12 applies static pressure to the lens according to preset parameters. During the process, data such as pressure value, lens deformation, and pressure application time are collected in real time (some devices can be equipped with an optical monitoring module to observe whether microcracks appear in the lens). If the lens breaks before reaching the maximum test pressure, the system will automatically record the "breakage pressure value" as an indicator of the lens's static pressure resistance.

[0019] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An edge uniform stress clamping device of a lens hydrostatic testing machine, comprising a base table (1), characterized in that: A lifting platform (11) is fixedly connected to one side of the upper surface of the base (1). A pressure device (12) is fixedly installed on the movable end of the lifting platform (11). A receiving cavity (13) is opened on the inner side of the base (1). A clamping assembly (2) for fixing the lens is provided on the inner side of the receiving cavity (13). Four rectangular sliding mouths (14) are opened in a ring array on the upper surface of the base (1). A working plate (15) is arranged between the four rectangular sliding mouths (14). The working plate (15) is fixedly connected to the upper surface of the base (1).

2. The edge uniform stress clamping device of a lens hydrostatic tester according to claim 1, wherein: The clamping assembly (2) includes multiple support rods (21) fixedly installed on the bottom wall of the receiving cavity (13). The top ends of the multiple support rods (21) are fixedly connected to a support plate (22). The four side walls of the support plate (22) are rotatably connected to linkage clamping rods (23). The middle ends of the four linkage clamping rods (23) are all provided with slots (24). A cylinder (25) is fixedly installed on the bottom wall of the receiving cavity (13). The piston end of the cylinder (25) is fixedly connected to a sliding rod (26). The top end of the sliding rod (26) passes through the support plate (22) and a fixed seat (27) is fixedly sleeved on the top outer wall. Multiple pull rods (28) are arranged in a ring array on the outer wall of the fixed seat (27). The multiple pull rods (28) are rotatably connected to the fixed sleeve through a rotating shaft. The top ends of the multiple pull rods (28) are inserted into the slots (24) and rotatably connected to the linkage clamping rods (23) through a rotating shaft.

3. The edge uniform stress clamping device of a lens hydrostatic tester according to claim 2, wherein: The tops of the four linkage clamping rods (23) slide within the corresponding rectangular sliding openings (14).

4. The edge uniform stress clamping device of a lens hydrostatic tester according to claim 2, wherein: Anti-slip pads (231) are glued and fixed to the top side walls of the four linkage clamping rods (23).

5. The edge uniform stress clamping device of a lens hydrostatic tester according to claim 1, wherein: A control panel (16) is provided on one side of the base (1), and a control button (17) is provided on the other side of the base (1).

6. The edge uniform stress clamping device of a lens hydrostatic tester according to claim 1, wherein: The base (1) is hinged to one side with a door (18) for sealing the receiving cavity (13).

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