Clamping mechanism for lens processing

Abstract

The utility model provides a clamping mechanism for lens processing, which relates to the technical field of lens processing devices, and comprises a pair of sliding arms, the two sliding arms are arranged in a relative sliding manner, the opposite sides of the two sliding arms are respectively and fixedly provided with a driving source for driving the sliding arms to slide, and the opposite sides of the two sliding arms are detachably and fixedly provided with a clamping plate. Pushing blocks are fixedly arranged in the middles of the sliding arms, inclined pushing faces are symmetrically and fixedly arranged on the two sides, on the pushing blocks, of the sliding arms, placing discs are arranged at the midpoints of the opposite sides of the two clamping plates, a pair of rotating arms are symmetrically and rotationally arranged on the two sides of any sliding arm, and one ends of the two rotating arms are symmetrically arranged on the two sides of the placing discs in the direction perpendicular to the sliding direction of the sliding arms; elastic pieces are fixedly arranged on the outer sides of the other ends of the two rotating arms and used for supporting the rotating arms to abut against the inclined pushing faces. When the two sliding arms move relatively, the inclined pushing faces push the rotating arms to rotate, the tail ends of the rotating arms are driven to be synchronously gathered towards the center of the lens, dynamic balance of four-direction clamping force is achieved, and the problem that a traditional clamp is single in size adaptation is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lens processing device technical field especially relates to a clamping mechanism for lens processing. BACKGROUND

[0002] As the core component of optical sighting system, the sighting lens realizes light refraction and focusing through the combination of multiple lenses, and its processing precision directly affects the imaging clarity, distortion control and field stability. High-precision lenses need to have uniform curved surface, smooth surface quality and strict center axis alignment characteristics to ensure that the incident light forms an unbiased target projection after passing through multiple lenses. Currently, optical glass or resin materials are commonly used in lens processing to achieve micron-level surface precision through grinding, polishing and coating processes. The performance directly determines the rapid aiming capability, environmental adaptability and reliability of the sighting telescope under extreme temperature.

[0003] The existing lens processing clamping mechanism mainly uses a ring-shaped metal mold to fix the outer edge of the lens. Although this structure can ensure processing stability, it still has some defects. The inner diameter of the mold strictly matches the diameter of the lens, and a single set of clamps only fits fixed-size lenses. Different specifications of products require frequent mold replacement, resulting in poor production line compatibility and rising processing costs. In addition, particles generated during polishing and grinding can easily accumulate in the clamping gap, which may scratch the lens surface. The above problems restrict the batch production of multi-specification and high-yield lenses. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a clamping mechanism for lens processing, which solves the problems of single clamp size and easy accumulation of debris scratching the lens surface in the prior art.

[0005] According to the embodiment of the utility model, a clamping mechanism for lens processing comprises:

[0006] A pair of sliding arms are oppositely arranged, and a driving source is fixedly arranged on the opposite side of each sliding arm to drive the sliding movement. A clamping plate is detachably fixed on the opposite side of the sliding arms. A push block is fixedly arranged in the middle of the sliding arm, and a slanted push surface is symmetrically arranged on both sides of the push block.

[0007] A placement disc is arranged at the midpoint of the opposite side of the clamping plate.

[0008] A pair of rotating arms are symmetrically arranged on both sides of the sliding arm, and one end of the rotating arm is arranged on both sides of the placement disc perpendicular to the sliding direction of the sliding arm. The other end of the rotating arm is fixedly arranged on the outside of the placement disc, and an elastic element is arranged on the other end of the rotating arm to support the rotating arm and the slanted push surface.

[0009] The technical principle of the utility model is: when using, the lens to be processed is placed on the placing disc, the driving source is started to drive the two sliding arms to slide relative to each other, the pushing block slides together with the sliding arm, the inclined pushing surface on the pushing block pushes the two rotating arms which abut against each other to open to the two sides, in the process of moving to the two sides along the inclined pushing surface, the other end of the two rotating arms moves relative to the lens on the placing disc, finally the two clamping plates and the two rotating arms gather to the center of the lens synchronously, so that the lens is clamped stably from four directions at the same time.

[0010] Further, the clamping mechanism further comprises a base, the base is fixedly arranged horizontally, a supporting edge is fixedly arranged around the outer edge of the base, a pair of first limiting parts for the sliding arms to pass through and slide are fixedly arranged symmetrically on the top end of the base on both sides of the sliding arm, and the driving source is fixedly arranged at the two ends of the supporting edge.

[0011] Further, the driving source comprises a servo motor, a screw rod is fixedly connected to the output end of the servo motor, a threaded hole is through-arranged on the outer side of the sliding arm, and the threaded hole and the screw rod are mutually engaged.

[0012] Further, the rotating arm is arc-shaped, a roller is rotatably arranged at one end of the rotating arm close to the inclined pushing surface, and the roller abuts against the inclined pushing surface.

[0013] Further, the elastic member comprises a spring, one end of the spring is fixedly connected to the outer side of the rotating arm, and the other end is fixedly connected to the inner wall of the supporting edge.

[0014] Further, a clamping wheel is rotatably arranged at one end of the rotating arm close to the placing disc, a plurality of limiting grooves are arranged around the clamping wheel, and the plurality of limiting grooves are arranged at equal intervals from large to small in width.

[0015] Further, a gas cylinder is fixedly arranged at the bottom of the base, and the output shaft of the gas cylinder is fixedly connected to the bottom of the placing disc.

[0016] Further, the placing disc comprises an electric suction disc, and the electric suction disc is provided with a suction hole in the middle part.

[0017] Further, the clamping plate is fixedly connected to the sliding arm through a bolt, and an arc surface is coaxially arranged on the side of the clamping plate close to the placing disc.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. By adopting the linkage driving structure of sliding arms and rotating arms, when the two sliding arms move relative to each other, the end of the rotating arm is synchronously gathered to the center of the lens through the cooperation of the inclined pushing surface and the elastic member, the dynamic balance of four-direction clamping force is realized, the clamping range can be self-adaptively expanded with the diameter of the lens, the compatibility requirement of the lens is met, and the problem of single size adaptation of the traditional clamp is solved.

[0020] 2. By adopting the centering displacement design of the clamping plate and the rotating arm, the end of the rotating arm always moves symmetrically with the clamping plate, the high-precision centering clamping of the lens is ensured, the repeated positioning deviation caused by replacement of the traditional clamp is eliminated, and the processing equipment does not need to be frequently calibrated.

[0021] 3. By the clamping gap structure between the clamping plate and the rotating arm, the vibration effect in the processing process can make most of the debris naturally fall off along the gap, the debris residue is reduced compared with the traditional ring-shaped clamp, and the risk of mirror scratches is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the overall structure of the embodiment of the utility model.

[0023] Figure 2 It is Figure 1 It is an enlarged schematic view of the structure at A.

[0024] Figure 3 It is a schematic view of the overall top plan structure of the embodiment of the utility model.

[0025] Figure 4 It is a schematic view of the overall bottom structure of the embodiment of the utility model.

[0026] In the above drawings: 1, base; 11, support leg; 12, support along; 121, spring; 122, limit column; 13, first limit part; 131, limit top plate; 14, second limit part; 15, servo motor; 151, screw rod; 16, rotating pin; 2, sliding arm; 21, pushing block; 211, inclined pushing surface; 22, clamping plate; 3, rotating arm; 31, clamping wheel; 311, limit groove; 32, roller; 4, placing disc; 41, air suction hole; 5, air cylinder. DETAILED DESCRIPTION

[0027] As Figure 1 and Figure 3As shown, the utility model embodiment proposes a kind of clamping mechanism for lens processing, including base 1, the base 1 is fixed horizontally arranged, the base 1 bottom is uniformly fixed and is provided with support leg 11, the base 1 outer along fixed setting has support along 12, in the base 1 top relative sliding setting has a pair of sliding arm 2, the support along 12 outer wall on the opposite side of two the sliding arm 2 is respectively fixed and is provided with the drive source for driving its sliding, the drive source includes linear motor, pneumatic cylinder or hydraulic cylinder and other some can drive the mechanism of the linear motion of sliding arm 2, in this embodiment, the drive source is set as servo motor 15, the output of servo motor 15 is fixedly connected with screw rod 151, the screw rod 151 is through and passes through the support along 12, the sliding arm 2 outside is axially through and is provided with screw hole, the screw hole is mutually engaged with the screw rod 151, to make the servo motor 15 rotation can drive the sliding arm 2 accurate sliding.

[0028] As Figure 1 And Figure 3 As shown, in this embodiment, further, the base 1 top end is fixed and symmetrically set with a pair of first limit part 13 on the two sides of the sliding arm 2, two the first limit part 13 is respectively set in the position of the two ends close to two the servo motor 15, to supply the sliding arm 2 from the gap and slide, the top of the first limit part 13 is also detachably provided with limit top plate 131 by bolt, the gap between the limit top plate 131 is less than the first limit part 13, to make the gap for the sliding arm 2 pass through is convex, preferably, the cross section of the sliding arm 2 can also be set as convex to fit the convex gap, prevent the deviation of sliding arm 2 in the sliding process, further, the base 1 top end is also fixed and symmetrically set with a pair of second limit part 14 on the two sides of the sliding arm 2, the first limit part 13 is respectively set in the relative sliding center close to two the clamping arm, to further enhance the stability in the sliding process of sliding arm 2.

[0029] As Figures 1-3 As shown, in this embodiment, further, the placing disc 4 is set in the sliding midpoint of the opposite side of two the clamping plate 22, the top of the placing disc 4 is provided with the concave micro-arc surface, to facilitate lens placement, two the sliding arm 2 opposite side detachably fixedly set with clamping plate 22, specifically, the clamping plate 22 is fixedly connected with the sliding arm 2 by bolt, the arc surface is coaxially arranged with the placing disc 4 on the side close to the placing disc 4 of the clamping plate 22, for contact with the edge of the lens, preferably, the inner side of the arc surface can be set as anti-skid wear-resistant elastic material, such as polyurethane elastomer, silicone rubber or thermoplastic polyurethane etc., to further improve the clamping effect, and will not cause rigid damage to the lens.

[0030] As Figures 1-3 In the embodiment, further, the middle part of the sliding arm 2 is fixedly provided with a pushing block 21 between the first limiting part 13 and the second limiting part 14. Specifically, the pushing block 21 is symmetrically fixed on both sides of the sliding arm 2 in the shape of an isosceles triangle. The plane of the isosceles triangle that faces the placing disc 4 is provided as an inclined pushing surface 211. The inclined pushing surface 211 forms an obtuse angle with the sliding arm 2. Meanwhile, a pair of rotating arms 3 is symmetrically arranged on both sides of the sliding arm 2. Preferably, a pair of rotating pins 16 is fixedly arranged on both sides of the second limiting part 14. The middle part of each rotating arm 3 is rotatably connected to the rotating pin 16. One end of each rotating arm 3 is symmetrically arranged on both sides of the placing disc 4 perpendicular to the sliding direction of the sliding arm 2. The other end of each rotating arm 3 is fixedly provided with an elastic member on the outer side for supporting the rotating arm 3 against the inclined pushing surface 211. Specifically, the rotating arm 3 is in the shape of an arc. One end of the rotating arm 3 close to the inclined pushing surface 211 is rotatably provided with a roller 32. The roller 32 is in contact with the inclined pushing surface 211. The roller 32 can reduce the friction when the rotating arm 3 is in contact with the inclined pushing surface 211, thereby reducing the rigid wear. Preferably, the elastic member can be a spring 121. One end of the spring 121 is fixedly connected to the outer side of the rotating arm 3, and the other end is fixedly connected to the inner wall of the supporting rail 12. A limiting column 122 is further fixedly arranged in the spring 121. The limiting column 122 is fixedly connected to the supporting rail 12 to prevent the spring 121 from deviating during the extension and contraction. The spring 121 provides a supporting force for the rotating arm 3, so that the rotating arm 3 is always in contact with the inclined pushing surface 211.

[0031] As Figures 1-4Further, the rotating arm 3 is provided with a clamping wheel 31 at one end close to the placing disc 4, the clamping wheel 31 can avoid rigid contact with the lens by rotating when clamping the lens, the clamping wheel 31 is also made of elastic material to improve the clamping effect, a plurality of limiting grooves 311 are coaxially arranged on the clamping wheel 31, the limiting grooves 311 are not too deep, and the widths of the limiting grooves 311 are arranged from large to small according to the thickness of the lens to be machined, and the base 1 is fixedly provided with a gas cylinder 5 at the bottom, the output shaft of the gas cylinder 5 is fixedly connected with the bottom of the placing disc 4 through the base 1, the lens on the placing disc 4 can change the height by driving the gas cylinder 5, so that the edge of the lens can be clamped into the limiting groove 311 when clamped by the clamping wheel 31, so that the lens is clamped more stably, and the placing disc 4 can be provided with an electric suction cup, the electric suction cup is provided with a suction hole 41 in the middle, and the lens can be stably adsorbed by the electric suction cup.

[0032] The technical principle of the utility model is: when using, the lens to be machined is placed on the placing disc 4, according to the thickness of the lens, the gas cylinder 5 is started to adjust the height of the lens, so that the lens and the limiting groove 311 matched with the thickness of the lens are at the same height, the servo motor 15 is started to drive the two sliding arms 2 to slide relatively, the pushing block 21 slides together with the sliding arm 2, and the inclined pushing surface 211 on the pushing block 21 pushes the two rotating arms 3 away from each other, the roller 32 of the two rotating arms 3 moves to the side along the inclined pushing surface 211, and the clamping wheel 31 at the other end moves relatively to the lens on the placing disc 4, finally, the two clamping plates 22 and the two rotating arms 3 gather to the center of the lens synchronously, so that the lens is clamped stably from four directions at the same time.

[0033] The utility model discloses a linkage drive structure is adopted to sliding arm 2 and rotating arm 3, makes when two sliding arms 2 relative movement, through the cooperation of inclined push surface 211 and spring 121, drives rotating arm 3 end to gather to the lens center synchronously, realizes four -way clamping force dynamic balance, makes the clamping range can expand with the lens diameter self -adaptation, satisfies the compatibility demand of lens, solves the problem of traditional fixture size adaptation single, through adopting the clamping plate 22 and clamping wheel 31 center displacement design, makes clamping plate 22 and clamping wheel 31 always symmetrical movement, ensures lens high -precision centering clamping, eliminates the repeated positioning deviation caused by traditional fixture replacement, makes processing equipment not need frequent calibration, through the clamping gap structure between clamping plate 22 and rotating arm 3, makes the vibration effect in the processing process can make most of the debris along the gap natural drop, compared with traditional annular fixture debris residual quantity reduces, significantly reduces the mirror surface scratch risk, the cooperation of limiting groove 311 on clamping wheel 31 and pneumatic cylinder 5 can make according to the thickness of lens to make it embed in the limiting groove 311 of corresponding width, thereby realizes more stable clamping effect.

[0034] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the utility model technical solutions, which should be covered in the scope of the claims of the utility model.

Claims

1. A clamping mechanism for lens processing, characterized in that, The utility model relates to a clamping mechanism, including: A pair of sliding arms (2) are oppositely arranged, and driving sources for driving the sliding of the sliding arms (2) are fixedly arranged on the opposite sides of the sliding arms (2), respectively; the opposite sides of the sliding arms (2) are detachably fixedly provided with clamping plates (22); the middle parts of the sliding arms (2) are fixedly provided with push blocks (21); the push blocks (21) are symmetrically fixedly provided with inclined push surfaces (211) on the two sides of the sliding arms (2); A placing disc (4) is arranged at the midpoint of the opposite sides of the clamping plates (22); A pair of rotating arms (3) are symmetrically arranged on the two sides of any one of the sliding arms (2) in the middle part; the two ends of the rotating arms (3) are symmetrically arranged on the two sides of the placing disc (4) perpendicularly to the sliding direction of the sliding arms (2); the outer sides of the other ends of the rotating arms (3) are fixedly provided with elastic members for supporting the rotating arms (3) to abut against the inclined push surfaces (211).

2. The lens processing chucking mechanism according to claim 1, wherein: The clamping mechanism further comprises a base (1) which is fixedly and horizontally arranged; a supporting edge (12) is fixedly and peripherally arranged on the base (1); a pair of first limiting parts (13) for the sliding arms (2) to pass through and slide are symmetrically arranged on the two sides of the base (1) at the top end; and the driving sources are fixedly arranged at the two ends of the supporting edge (12).

3. The lens processing chucking mechanism according to claim 2, wherein: The driving sources comprise a servo motor (15), the output end of the servo motor (15) is fixedly connected with a lead screw (151), and a threaded hole is through-arranged on the outer side of the sliding arm (2) and is in mesh with the lead screw (151).

4. The lens processing chucking mechanism according to claim 2, wherein: The rotating arm (3) is arc-shaped, one end of the rotating arm (3) close to the inclined push surface (211) is rotatably provided with a roller (32), and the roller (32) abuts against the inclined push surface (211).

5. The lens processing chucking mechanism according to claim 4, wherein: The elastic member comprises a spring (121), one end of the spring (121) is fixedly connected with the outer side of the rotating arm (3), and the other end is fixedly connected with the inner wall of the supporting edge (12).

6. The lens processing chucking mechanism according to claim 5, wherein: One end of the rotating arm (3) close to the placing disc (4) is rotatably provided with a clamping wheel (31), the clamping wheel (31) is peripherally provided with a plurality of limiting grooves (311), and the widths of the limiting grooves (311) are arranged in an equal distance from large to small.

7. The lens processing chucking mechanism according to claim 6, wherein: A gas cylinder (5) is fixedly arranged on the bottom of the base (1), and the output shaft of the gas cylinder (5) is fixedly connected with the bottom of the placing disc (4).

8. The lens processing chucking mechanism according to claim 1, wherein: The placing disc (4) comprises an electric suction disc, and the middle part of the electric suction disc is provided with a suction hole (41).

9. The lens processing chucking mechanism of claim 1, wherein: The clamping plate (22) is fixedly connected with the sliding arm (2) through bolts, and the side of the clamping plate (22) close to the placing disc (4) is coaxially provided with an arc surface.

Images