Self-centering clamp

Abstract

The utility model discloses a self-centering clamp which comprises a bearing mechanism, a clamping mechanism and a driving mechanism, and the bearing mechanism comprises a placing table; the clamping mechanism comprises a plurality of clamping pieces, the clamping pieces are annularly arranged and slidably arranged on the placement table so as to define a clamping space of a columnar structure on the placement table, and the clamping space is concentric with a detection head of a detection device; the driving mechanism is connected with the clamping pieces and used for driving the clamping pieces to be closed up or separated from one another so that the clamping pieces can clamp or loosen the optical lens. The beneficial effects of the utility model are that the clamp is suitable for clamping and fixing the optical lens in a certain diameter range when the optical lens is subjected to center thickness detection, and has strong versatility.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lens jigs, in particular to a self-centering jig. Background Art

[0002] In the optical field, the detection of optical lenses is of great significance in determining the optical effect. Measuring the central thickness of optical lenses is the top priority among them, which directly affects the quality of optical lenses.

[0003] When using the existing optical lens central thickness detection device (such as a lens central thickness optical detector disclosed in the patent application No. 201320056265.4) to detect the central thickness of an optical lens, the optical lens is fixed by a fixing base. However, this fixing base can only fix lenses with a specific diameter. If it is necessary to fix optical lenses with other diameters, a compatible fixing base needs to be replaced, which is not universal. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above technical deficiencies, and propose a self-centering jig to solve the technical problem that the fixing base in the prior art can only fix lenses with a specific diameter and is not universal.

[0005] To achieve the above technical purpose, the technical solution of the utility model provides a self-centering jig for clamping and positioning an optical lens, including:

[0006] A bearing mechanism, which includes a placement table, and a plurality of first chutes are opened on the placement table, and each of the first chutes is circumferentially arranged;

[0007] A clamping mechanism, which includes a plurality of clamping members, each of the clamping members is circumferentially arranged and is slidably arranged on the placement table to enclose a columnar clamping space on the placement table. The clamping space is concentric with the detection head of the detection device, and the lower ends of each of the clamping members are respectively slidably arranged in the corresponding first chutes;

[0008] The driving mechanism is connected to each of the clamping members and is used to drive each of the clamping members to move closer to or away from each other, so as to clamp or release the optical lens with each of the clamping members. The driving mechanism includes a rotating table and at least one elastic member. The rotating table is disposed directly below the placing table and is rotatably disposed on the bearing mechanism. The rotating table is slidably connected to the lower ends of each of the clamping members. During the forward or reverse rotation of the rotating table, each of the clamping members can be driven to move away from or closer to each other. Each of the elastic members is circumferentially disposed on the side of the rotating table. One end of each of the elastic members is connected to the rotating table, and the other end of each of the elastic members is connected to the bearing mechanism, so that each of the clamping members is in a closed state. A plurality of guiding grooves are formed in the rotating table. Each of the guiding grooves is an arc-shaped groove and is circumferentially disposed. The lower ends of each of the clamping members are respectively slidably disposed in the corresponding guiding grooves.

[0009] Further, each of the first sliding grooves extends along the radial direction of the clamping space.

[0010] Further, the bearing mechanism further includes an installation ring. The installation ring is sleeved outside the rotating table. The installation ring is concentric with the clamping space. Each of the elastic members is sleeved on the installation ring.

[0011] Further, the elastic member is a spring.

[0012] Further, the bearing mechanism further includes a base. The base has a cavity with an open upper surface. The placing table is detachably fixed at the opening of the cavity. The installation ring is fixed in the cavity. The rotating table is rotatably disposed on the base.

[0013] Further, the driving mechanism further includes a plurality of guiding seats. Each of the guiding seats is circumferentially disposed on the side of the rotating table and is fixedly connected to the side wall of the rotating table. Each of the guiding seats is also slidably sleeved on the installation ring.

[0014] Further, the bearing mechanism further includes a plurality of fixing seats. Each of the fixing seats is circumferentially disposed on the side of the rotating table and is fixedly connected to the base. Each of the fixing seats is also fixedly connected to the installation ring. Each of the fixing seats and each of the guiding seats are alternately arranged. Each of the elastic members is respectively disposed between the corresponding guiding seat and the fixing seat. The two ends of the elastic member are respectively fixedly connected to the guiding seat and the fixing seat.

[0015] Further, a plurality of second sliding grooves communicating with the cavity are circumferentially formed in the side wall of the base. Each of the guiding seats respectively slidably penetrates through the corresponding second sliding groove and extends to the outside of the cavity.

[0016] Compared with the prior art, the beneficial effects of the utility model include: when in use, the optical lens is placed in the clamping space and placed on the placement table, and by manipulating the driving mechanism, the driving mechanism can drive the various clamping parts to retract against each other, so that the various clamping parts clamp the optical lens, thereby achieving the fixation of the optical lens within a certain diameter range. Since the clamping space is concentric with the detection head, the optical lens fixed by the various clamping parts is also concentric with the detection head, which facilitates the detection head to measure the center thickness of the optical lens. The fixture is suitable for clamping and fixing optical lenses within a certain diameter range when performing center thickness detection, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a self-centering clamp provided by the utility model;

[0018] Figure 2 yes Figure 1 An exploded view of a self-centering fixture in Figure 1;

[0019] Figure 3 It is a structural schematic diagram of a self-centering clamp provided by the utility model;

[0020] In the figure: 100 - bearing mechanism, 110 - placing table, 111 - first slide groove, 120 - mounting ring, 130 - base, 131 - cavity, 132 - second slide groove, 140 - fixed seat, 200 - clamping mechanism, 210 - clamping member, 220 - guide column, 300 - driving mechanism, 310 - rotating table, 311 - guide groove, 320 - elastic member, 330 - guide seat. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The utility model provides a self-centering fixture for clamping and positioning an optical lens. Figure 1 - Figure 3As shown in the figure, it includes a carrying mechanism 100, a clamping mechanism 200 and a driving mechanism 300. The carrying mechanism 100 includes a placing table 110; the clamping mechanism 200 includes a plurality of clamping members 210. Each of the clamping members 210 is circumferentially arranged and slidably arranged on the placing table 110 to enclose a clamping space in the shape of a columnar structure on the placing table 110. The clamping space is concentric with the detection head of the detection device; the driving mechanism 300 is connected to each of the clamping members 210 and is used to drive each of the clamping members 210 to close or separate from each other, so that each of the clamping members 210 clamps or loosens the optical lens.

[0023] During use, place the optical lens in the clamping space and on the placing table 110. By operating the driving mechanism 300, the driving mechanism 300 can drive each of the clamping members 210 to close towards each other, so that each of the clamping members 210 clamps the optical lens, realizing the fixation of the optical lens within a certain diameter range. Since the clamping space is concentric with the detection head, the optical lens fixed by each of the clamping members 210 is also concentric with the detection head, which is convenient for the detection head to measure the central thickness of the optical lens. This fixture is suitable for clamping and fixing the optical lens when detecting the central thickness within a certain diameter range and has strong versatility.

[0024] As a preferred embodiment, please refer to Figure 1 , a plurality of first chutes 111 are formed on the placing table 110. Each of the first chutes 111 is circumferentially arranged and extends along the radial direction of the clamping space. The lower ends of the clamping members 210 are respectively slidably arranged in the corresponding first chutes 111. The movement of each of the clamping members 210 can be guided through each of the first chutes 111, so that each of the clamping members 210 can close or separate from each other.

[0025] As a preferred embodiment, please refer to Figure 2 and Figure 3, the driving mechanism 300 includes a rotating table 310 and at least one elastic member 320. The rotating table 310 is disposed directly below the placing table 110 and is rotatably disposed on the bearing mechanism 100. The rotating table 310 is slidably connected to the lower ends of the clamping members 210. During the forward or reverse rotation of the rotating table 310, the clamping members 210 can be driven to separate or converge from each other. Each elastic member 320 is circumferentially disposed on the side of the rotating table 310. One end of each elastic member 320 is connected to the rotating table 310, and the other end of each elastic member 320 is connected to the bearing mechanism 100, so that each clamping member 210 is in a converged state. When an optical lens needs to be placed in the clamping space, the rotating table 310 is manually rotated forward, so that the clamping members 210 separate from each other. At this time, the elastic members 320 will accumulate elastic potential energy. Place the optical lens in the clamping space and on the placing table 110. Release the rotating table 310, and each elastic member 320 will release elastic potential energy, pushing the rotating table 310 to rotate in the reverse direction, so that the clamping members 210 converge from each other, thereby clamping the optical lens. Since a small part of the optical lens center thickness detection device uses a pneumatic three-jaw chuck to clamp the optical lens and position the optical lens when detecting the center thickness of the optical lens, so that the center of the optical lens is coaxial with the center line of the detection lens. However, the action of clamping or releasing the optical lens by the pneumatic three-jaw chuck is realized by pneumatically driving the three jaws of the chuck to converge or separate from each other. This type of fixture will increase the equipment cost. In addition, each time the optical lens is clamped or released, a pneumatic driving member needs to be started, which is rather troublesome. This fixture adopts a manual driving method, which saves costs. Each time the optical lens is clamped or released, a pneumatic driving member does not need to be started, and the operation is convenient.

[0026] As a preferred embodiment, please refer to Figure 2 and Figure 3 , a plurality of guiding grooves 311 are formed in the rotating table 310. Each guiding groove 311 is an arc-shaped groove and is circumferentially arranged. The lower ends of the clamping members 210 are respectively slidably disposed in the corresponding guiding grooves 311. Since each clamping member 210 is respectively guided and restricted by the corresponding first sliding groove 111 and the guiding groove 311, when the rotating table 310 rotates forward or backward, it will drive the clamping members 210 to converge or separate from each other.

[0027] As a preferred embodiment, please refer to Figure 2 and Figure 3, the bearing mechanism 100 further includes a mounting ring 120. The mounting ring 120 is sleeved outside the rotating table 310, and the mounting ring 120 is concentric with the clamping space. Each elastic member 320 is sleeved on the mounting ring 120. The mounting ring 120 can guide the deformation of the elastic member 320, so that the deformation of the elastic member 320 presents an arc structure, which is convenient for resetting the rotating table 310.

[0028] As a preferred embodiment, the elastic member 320 is a spring, which can accumulate elastic potential energy by compression or stretching.

[0029] As a preferred embodiment, please refer to Figure 1 and Figure 2 , the bearing mechanism 100 further includes a base 130. The base 130 has a cavity 131 with an open upper surface. The placement table 110 is detachably fixed at the opening of the cavity 131. The mounting ring 120 is fixed in the cavity 131. The rotating table 310 is rotatably arranged on the base 130. The base 130 can support the placement table 110, the mounting ring 120 and the rotating table 310.

[0030] As a preferred embodiment, please refer to Figure 2 and Figure 3 , the driving mechanism 300 further includes a plurality of guide seats 330. Each guide seat 330 is circumferentially arranged on the side of the rotating table 310 and is fixedly connected to the side wall of the rotating table 310. Each guide seat 330 is also slidably sleeved on the mounting ring 120. The rotating table 310 can be slidably connected to the mounting ring 120 via each guide seat 330.

[0031] As a preferred embodiment, please refer to Figure 2 and Figure 3 , the bearing mechanism 100 further includes a plurality of fixing seats 140. Each fixing seat 140 is circumferentially arranged on the side of the rotating table 310 and is fixedly connected to the base 130. Each fixing seat 140 is also fixedly connected to the mounting ring 120. Each fixing seat 140 and each guide seat 330 are alternately arranged. Each elastic member 320 is respectively arranged between the corresponding guide seat 330 and the fixing seat 140. The two ends of the elastic member 320 are respectively fixedly connected to the guide seat 330 and the fixing seat 140, which is convenient for fixing the end of the elastic member 320 through the fixing seat 140 and enabling the rotating table 310 to reciprocally rotate within a certain angle. The elastic member 320 can be arranged on one side of the guide seat 330 or on both sides of the guide seat 330, and can be selected according to actual needs.

[0032] As a preferred embodiment, please refer to Figure 2 and Figure 3 The side wall of the base 130 is circumferentially provided with a plurality of second slide grooves 132 that are all connected to the cavity 131. Each of the guide seats 330 slides through the corresponding second slide groove 132 and extends to the outside of the cavity 131, so that people can manually operate the guide seat 330.

[0033] As a preferred embodiment, please refer to Figure 2 The clamping mechanism 200 also includes a plurality of guide posts 220, each of which is vertically and slidably arranged in the corresponding guide groove 311, and is fixedly connected to the bottom of the corresponding clamping member 210, respectively. The diameter of the guide post 220 is smaller than the diameter of the clamping member 210. Through the connection between the guide post 220 and the guide groove 311, the clamping member 210 can be guided and limited.

[0034] In order to better understand the present invention, the following Figure 1 - Figure 3 The working principle of the technical solution of the utility model is described in detail:

[0035] During use, when it is necessary to place an optical lens in the clamping space, the rotating table 310 is manually rotated forward. Since each of the clamping members 210 is respectively guided and restricted by the corresponding first slide groove 111 and the guide groove 311, when the rotating table 310 is in the process of forward rotation, it will drive each of the clamping members 210 to separate from each other. At this time, the elastic member 320 will accumulate elastic potential energy, and the optical lens will be placed in the clamping space and on the placement table 110. The rotating table 310 is released, and each of the clamping members 210 is separated from each other. The elastic member 320 will release elastic potential energy, pushing the rotating table 310 to rotate in the opposite direction, so that the clamping members 210 are retracted against each other, thereby clamping the optical lens, thereby fixing the optical lens within a certain diameter range. Since the clamping space is concentric with the detection head, the optical lens fixed by the clamping members 210 is also concentric with the detection head, which facilitates the detection head to measure the center thickness of the optical lens. This fixture is suitable for clamping and fixing optical lenses within a certain diameter range when performing center thickness detection, and has strong versatility.

[0036] The self-centering fixture provided by the utility model has the following beneficial effects:

[0037] (1) When the rotating table 310 is rotating in the forward direction, it will drive the clamping members 210 to separate from each other. At this time, the elastic member 320 will accumulate elastic potential energy, and the optical lens will be placed in the clamping space and on the placement table 110. When the rotating table 310 is released, the elastic members 320 will release elastic potential energy and push the rotating table 310 to rotate in the reverse direction, so that the clamping members 210 will be retracted to each other, thereby clamping the optical lens and fixing the optical lens within a certain diameter range;

[0038] (2) A small number of optical lens center thickness detection devices use a pneumatic three-jaw chuck to clamp the optical lens and position the optical lens when detecting the center thickness of the optical lens, so that the center of the optical lens is coaxial with the center line of the detection lens. However, the action of the pneumatic three-jaw chuck to clamp or release the optical lens is achieved by pneumatically driving the three-jaw chuck to close or separate each other. This structure of the fixture will increase the equipment cost. In addition, the pneumatic drive component needs to be started every time the optical lens is clamped or released, which is troublesome. The present fixture uses a manual drive method to save costs. The pneumatic drive component does not need to be started every time the optical lens is clamped or released, and the operation is convenient.

[0039] (3) This fixture is suitable for clamping and fixing optical lenses within a certain diameter range when testing the center thickness, and has strong versatility.

[0040] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A self-centering fixture for clamping and positioning an optical lens, characterized in that: include: The bearing mechanism comprises a placing platform, on which a plurality of first slide grooves are provided, and each of the first slide grooves is arranged in a circumferential direction; A clamping mechanism, comprising a plurality of clamping members, each of which is circumferentially arranged and slidably arranged on the placement table to enclose a clamping space of a columnar structure on the placement table, the clamping space is concentric with the detection head of the detection device, and the lower end of each of the clamping members is slidably arranged in the corresponding first slide groove; A driving mechanism is connected to each of the clamping members and is used to drive each of the clamping members to retract or separate from each other so that each of the clamping members clamps or releases the optical lens. The driving mechanism includes a rotating table and at least one elastic member. The rotating table is arranged directly below the placing table and is rotatably arranged on the supporting mechanism. The rotating table is slidably connected to the lower end of each of the clamping members. During the forward or reverse rotation of the rotating table, each of the clamping members can be driven to separate or retract from each other. Each of the elastic members is circumferentially arranged on the side of the rotating table, one end of each of the elastic members is connected to the rotating table, and the other end of each of the elastic members is connected to the supporting mechanism so that each of the clamping members is in a retracted state. A plurality of guide grooves are provided on the rotating table, each of which is an arc-shaped groove and is arranged in an annular direction. The lower end of each of the clamping members is slidably arranged in the corresponding guide groove.

2. The self-centering fixture according to claim 1, characterized in that: Each of the first sliding grooves extends along the radial direction of the clamping space.

3. The self-centering fixture according to claim 1, characterized in that: The bearing mechanism further comprises a mounting ring, the mounting ring is sleeved outside the rotating platform, the mounting ring is concentric with the clamping space, and each of the elastic members is sleeved on the mounting ring.

4. The self-centering fixture according to claim 3, characterized in that: The elastic member is a spring.

5. The self-centering fixture according to claim 3, characterized in that: The bearing mechanism also includes a base having a cavity with an opening on the upper surface. The placement table is detachably fixed at the opening of the cavity. The mounting ring is fixed in the cavity. The rotating table is rotatably arranged on the base.

6. The self-centering fixture according to claim 5, characterized in that The driving mechanism further comprises a plurality of guide seats, each of which is circumferentially arranged on the side of the rotating platform and fixedly connected to the side wall of the rotating platform. Each of the guide seats is also slidably sleeved on the mounting ring.

7. The self-centering fixture according to claim 6, characterized in that The bearing mechanism also includes a plurality of fixed seats, each of which is circumferentially arranged on the side of the rotating table and fixedly connected to the base, each of which is also fixedly connected to the mounting ring, each of the fixed seats and each of the guide seats are alternately arranged, each of the elastic members is respectively arranged between the corresponding guide seat and the fixed seat, and both ends of the elastic member are respectively fixedly connected to the guide seat and the fixed seat.

8. The self-centering fixture according to claim 6, characterized in that The side wall of the base is circumferentially provided with a plurality of second slide grooves which are all connected with the cavity, and each of the guide seats slides through the corresponding second slide groove and extends out of the cavity.

Images