Lens pickup jig

Abstract

This application discloses a lens gripping fixture, including a cylinder body, two sliding tables that can slide relative to each other, two sets of sliding plates respectively fixed on the sliding tables, a guide plate fixed on the cylinder body, and four sets of gripper assemblies. The sliding plates have two sets of guide grooves arranged in a figure-eight pattern; the guide plates are fixedly mounted with four sets of linear guide rails arranged in an X-shape. Each gripper assembly includes a gripper and a sliding connector. The sliding connector can slide within a corresponding set of guide grooves and is also slidably connected to a corresponding set of linear guide rails. This application uses the cylinder body to drive the two sliding tables to slide relative to each other, and in conjunction with the figure-eight guide grooves on the sliding plates and the X-shaped linear guide rails on the guide plate, efficiently amplifies the small displacement of the cylinder into a large range of movement of the gripper assemblies, thereby achieving a large gripping stroke with a relatively small cylinder volume.

Description

Technical Field

[0001] This application relates to the field of clamping technology, and in particular to a lens gripping clamp. Background Technology

[0002] Lens gripping fixtures are used in automated lens processing to change lens processing stations.

[0003] Some lens gripping fixtures use vacuum suction to pick up lenses for lens replacement. For example, Chinese Patent CN222904066U, published on May 27, 2025, discloses a lens gripping fixture including a column. The lower end of the column has a suction cup. The column has a channel and a chamber along its axial direction. The channel extends to the lower end face of the column, and the chamber extends to the upper end face. A sealing plate is provided on the upper end face of the column corresponding to the chamber. The bottom of the chamber has a sealing port communicating with the channel. A spring is provided in the chamber. The upper end of the spring has a fixing seat, and the lower end of the spring has a plug that seals with the sealing port. The outer wall of the column has a groove communicating with the chamber. A connecting rod slides within the groove, and one end of the connecting rod is connected to the plug. The drawback of this technical solution is that the suction cup needs to pick up the lens at the highest point of the lens, which easily leads to contact marks.

[0004] Some lens gripping fixtures use four-jaw cylinders (such as the cylindrical four-jaw cylinder model MHS4-50D) to hold lenses for lens changing. The drawback of this technical solution is that when it is necessary to grip large-diameter lenses (lens diameter ≥ 80mm), the four-jaw cylinder is too large and cannot meet the structural compactness requirements of automated lens processing equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a lens gripping fixture that enables a large gripping stroke with a relatively small cylinder, thereby meeting the gripping requirements of large-diameter lenses and satisfying the structural compactness requirements of automated lens processing equipment.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a lens gripping fixture, comprising: a cylinder, the cylinder including a cylinder body and two slides, the two slides being slidably connected to the cylinder body and capable of moving closer or further apart; two sets of sliding plates, each set of sliding plates being fixedly mounted on one slide, each set of sliding plates having two sets of guide grooves arranged in a figure-eight shape; a guide plate, the guide plate being fixedly mounted on the cylinder body, the guide plate having four sets of linear guide rails arranged in an X shape, each set of linear guide rails being perpendicular to a set of guide grooves; and four sets of gripper assemblies, each gripper assembly including grippers and sliding connectors, the grippers being fixedly connected to the sliding connectors, each set of sliding connectors being slidably connected in a corresponding set of guide grooves, and each set of sliding connectors being slidably connected to a corresponding set of linear guide rails.

[0008] As a preferred technical solution, the guide plate has elongated plate sections at its four corners that are adapted to the shape of each linear guide rail, and the elongated plate sections extend along the length direction of the linear guide rail; the sliding connector has through holes for the elongated plate sections and the corresponding linear guide rails to pass through.

[0009] As a preferred technical solution, the sliding connector includes a pulley, with an annular groove along the outer circumference of the pulley, and the sliding piece is engaged with the annular groove on the pulley.

[0010] As a preferred technical solution, the width of the guide groove at one end near the central axis of the cylinder body is equal to the diameter of the outer circumference of the pulley, and the width of the rest of the guide groove is equal to the diameter of the bottom of the annular groove.

[0011] As a preferred technical solution, the two opposite ends of the gripper are a connecting end and a contact end, respectively. The connecting end is fixedly connected to the sliding connector, and the contact end is provided with an anti-slip layer or anti-slip texture.

[0012] As a preferred technical solution, a slider is fixedly provided in the through hole on the sliding connector, and the slider is slidably connected to the linear guide rail.

[0013] Compared with the prior art, the beneficial effects of this application are as follows:

[0014] This application utilizes a cylinder body to drive two sliding tables to slide relative to each other. Combined with the "eight"-shaped guide groove on the sliding plate and the "X"-shaped linear guide rail on the guide plate, the small displacement of the cylinder is efficiently amplified into a large range of motion for the gripper assembly, thus achieving a large gripping stroke with a relatively small cylinder volume. This design enables the lens gripper to reliably hold large-diameter lenses while maintaining a compact overall structure, meeting the space requirements of automated lens processing equipment. It also avoids the contact marks that occur in the center of the lens in vacuum adsorption solutions, improving the stability and reliability of the lens processing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the lens gripping fixture of this application;

[0016] Figure 2 This is a bottom view of the lens gripping fixture of this application;

[0017] The components are: 1. Cylinder; 11. Cylinder body; 12. Slide table; 2. Sliding plate; 21. Guide groove; 3. Guide plate; 31. Long strip plate; 4. Gripper assembly; 41. Gripper; 42. Sliding connector; 421. Through hole; 422. Slider; 423. Pulley; 5. Linear guide rail. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0019] like Figure 1 and Figure 2 As shown, this application provides a lens gripping fixture, which includes: a cylinder 1, two sets of sliding plates 2, a guide plate 3, and four sets of gripper assemblies 4.

[0020] The cylinder 1 includes a cylinder body 11 and two slides 12. The two slides 12 are slidably connected to the cylinder body 11, and the two slides 12 can be relatively close to each other or relatively far apart.

[0021] Each set of sliding plates 2 is fixedly mounted on a slide table 12, and each set of sliding plates 2 has two sets of guide grooves 21 arranged in a figure-eight shape. A guide plate 3 is fixedly mounted on the cylinder body 11, and four sets of linear guide rails 5 arranged in an X shape are fixedly mounted on the guide plate 3. Each set of linear guide rails 5 is perpendicular to a set of guide grooves 21. Each set of gripper 41 assemblies 4 includes grippers 41 and sliding connectors 42. The grippers 41 are fixedly connected to the sliding connectors 42. Each set of sliding connectors 42 is slidably connected in a corresponding set of guide grooves 21, and each set of sliding connectors 42 is slidably connected to a corresponding set of linear guide rails 5.

[0022] The working principle of the lens gripper in this application is as follows:

[0023] When the cylinder body 11 drives the two slides 12 to move away from each other, each set of sliding connectors 42 moves outward along the guide groove 21 due to the guidance of the guide groove 21, so that the four sets of gripper assemblies 41 expand outward relative to each other; when the cylinder body 11 drives the two slides 12 to move closer together, each set of sliding connectors 42 moves inward along the guide groove 21 due to the guidance of the guide groove 21, so that the four sets of gripper assemblies 41 close together relative to each other to clamp the lens. During the movement of the four sets of gripper assemblies 41, due to the guidance of the four sets of linear guide rails 5, the four sets of gripper assemblies 41 are always located on the same circumference.

[0024] This application utilizes a cylinder body 11 to drive two sliding tables 12 to slide relative to each other. Combined with the "eight"-shaped guide groove 21 on the sliding plate 2 and the "X"-shaped linear guide rail 5 on the guide plate 3, the small displacement of the cylinder 1 is efficiently amplified into a large range of motion for the gripper assembly 4, thereby achieving a large clamping stroke with a relatively small cylinder 1. This design enables the lens gripper to reliably clamp large-diameter lenses while maintaining a compact overall structure, meeting the space requirements of automated lens processing equipment. It also avoids the contact marks that occur in the center of the lens in vacuum adsorption solutions, improving the stability and reliability of the lens processing process.

[0025] Furthermore, each of the four corners of the guide plate 3 is provided with a long strip plate portion 31 adapted to the shape of each linear guide rail 5, and the long strip plate portion 31 extends along the length direction of the linear guide rail 5. The sliding connector 42 is provided with a through hole 421 for the long strip plate portion 31 and the corresponding linear guide rail 5 to pass through. When the four sets of gripper assemblies 4 are closed relative to each other, the guide plate 3 limits the four sets of gripper assemblies 4 to have a minimum closing stroke; when the four sets of gripper assemblies 4 are opened relative to each other, the maximum stroke limitation of the cylinder 1 limits the four sets of gripper assemblies 4 to have a maximum opening stroke.

[0026] Furthermore, a slider 422 is fixedly installed in the through hole 421 on the sliding connector 42, and the slider 422 is slidably connected to the linear guide rail 5. Specifically, the slider 422 has a "U" shaped cross-section, and the linear guide rail 5 has grooves on both sides. The slider 422 engages with the grooves on the two sides of the linear guide rail 5 and can slide along the grooves.

[0027] Furthermore, the sliding connector 42 includes a pulley 423 with an annular groove along its outer circumference. The sliding piece 2 engages with the annular groove on the pulley 423. The width of the guide groove 21 at one end near the central axis of the cylinder body 11 is equal to the diameter of the outer circumference of the pulley 423, to facilitate the installation of the sliding connector 42; the width of the remaining portion of the guide groove 21 is equal to the diameter of the bottom of the annular groove, to prevent the sliding connector 42 from dislodging. It should be noted that during the movement of the four sets of gripper assemblies 4, due to the stroke limitation of the gripper assemblies 4, the sliding connector 42 will not slide to the end of the guide groove 21 near the central axis of the cylinder body 11.

[0028] Furthermore, the two opposite ends of the gripper 41 are a connecting end and a contact end, respectively. The connecting end is fixedly connected to the sliding connector 42, and the contact end is provided with an anti-slip layer or anti-slip texture to increase the friction between the gripper 41 and the lens when clamping the lens. In this application, several annular anti-slip textures are provided at the connecting end of the gripper 41.

[0029] It should be noted that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. Unless otherwise stated, terms such as "front," "back," "left," "right," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0030] The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A lens gripping clamp, characterized in that, The lens gripping fixture includes: The cylinder includes a cylinder body and two slides, which are slidably connected to the cylinder body and can be relatively close to or relatively far apart. Two sets of sliding plates, each set of sliding plates is fixedly installed on a sliding table, and each set of sliding plates is provided with two sets of guide grooves arranged in a figure-eight shape; A guide plate is fixedly installed on the cylinder body. Four sets of linear guide rails arranged in an "X" shape are fixedly installed on the guide plate. Each set of linear guide rails is perpendicular to a set of guide grooves. Four sets of gripper assemblies, each set of gripper assemblies includes grippers and sliding connectors. The grippers are fixedly connected to the sliding connectors. Each set of sliding connectors is slidably connected in a corresponding set of guide grooves, and each set of sliding connectors is slidably connected to a corresponding set of linear guide rails.

2. The lens gripping fixture according to claim 1, characterized in that, The guide plate has elongated plate sections at its four corners that are adapted to the shape of each linear guide rail, and the elongated plate sections extend along the length of the linear guide rail; the sliding connector has through holes for the elongated plate sections and the corresponding linear guide rails to pass through.

3. A lens gripping fixture according to claim 1 or 2, characterized in that, The sliding connector includes a pulley, and the pulley has an annular groove along its outer circumference. The sliding piece is engaged with the annular groove on the pulley.

4. A lens gripping fixture according to claim 3, characterized in that, The width of the guide groove at one end near the central axis of the cylinder body is equal to the diameter of the outer circumference of the pulley, and the width of the rest of the guide groove is equal to the diameter of the bottom of the annular groove.

5. A lens gripping fixture according to claim 1, characterized in that, The two ends of the gripper are a connecting end and a contact end, respectively. The connecting end is fixedly connected to the sliding connector, and the contact end is provided with an anti-slip layer or anti-slip texture.

6. A lens gripping fixture according to claim 2, characterized in that, A slider is fixedly provided on the sliding connector inside the through hole, and the slider is slidably connected to the linear guide rail.

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