gripping device

Abstract

The present application relates to a clamping device, comprising a first rotating shaft assembly, a second rotating shaft assembly, a first pressure head, a first transmission assembly, a third rotating shaft assembly, a second pressure head and a second transmission assembly. The first rotating shaft assembly is configured to rotate around a first axis. The second rotating shaft assembly is configured to rotate around a second axis. The first pressure head is arranged at one end of the second rotating shaft assembly. The first transmission assembly is configured to synchronously rotate the first rotating shaft assembly and the second rotating shaft assembly. The third rotating shaft assembly is configured to rotate around the second axis. The second pressure head is arranged at one end of the third rotating shaft assembly and opposite to the first pressure head. The second transmission assembly is configured to synchronously rotate the first rotating shaft assembly and the third rotating shaft assembly. One of the first pressure head and the second pressure head is configured to move towards the other of the first pressure head and the second pressure head along the second axis. Accordingly, the synchronous rotation of the rotating shaft assemblies eliminates the torque between the first pressure head and the second pressure head, and the internal structure of the multi-layer lens is not damaged by the torque.

Description

Technical Field

[0001] This application relates to a clamping device, and more particularly to a clamping device for clamping lenses. Background Technology

[0002] Augmented Reality (AR) lenses have a multi-layered structure, requiring a clamping process during manufacturing. Currently, common clamping devices often use two corresponding servo motors to simultaneously drive an upper and lower pressure head, causing relative movement between them to clamp the multi-layered lenses.

[0003] However, if either of the two servo motors malfunctions, has an error, or becomes unstable, the two servo motors will not be able to maintain a unified speed in real time. This will cause torque to be generated between the upper and lower pressure heads, which will cause the multilayer lens to be subjected to torque force, thereby damaging the internal structure of the lens and reducing the yield. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a clamping device that can solve the above problems.

[0005] This application discloses a clamping device comprising a first rotating shaft assembly, a second rotating shaft assembly, a first pressure head, a first transmission assembly, a third rotating shaft assembly, a second pressure head, and a second transmission assembly. The first rotating shaft assembly is configured to rotate about a first axis. The second rotating shaft assembly is configured to rotate about a second axis. The first pressure head is disposed at one end of the second rotating shaft assembly. The first transmission assembly is configured to synchronously rotate the first and second rotating shaft assemblies. The third rotating shaft assembly is configured to rotate about the second axis. The second pressure head is disposed at one end of the third rotating shaft assembly and is opposite to the first pressure head. The second transmission assembly is configured to synchronously rotate the first and third rotating shaft assemblies. One of the first or second pressure heads is configured to move along the second axis toward the other of the first and second pressure heads.

[0006] In some embodiments, the clamping device further includes a drive mechanism and a bearing, the drive mechanism being connected to a second rotating shaft assembly via the bearing. The drive mechanism is configured to drive the first pressure head to move along a second axis via the second rotating shaft assembly.

[0007] In some embodiments, the second shaft assembly includes a splined shaft and a splined wheel. The splined wheel surrounds the outside of the splined shaft. The splined wheel and the splined shaft are slidably engaged in a direction parallel to the second axis. The splined wheel is connected to a first transmission assembly and configured to rotate synchronously with the first transmission assembly. The drive unit is connected to the first pressure head via the splined shaft.

[0008] In some embodiments, the first shaft assembly includes a first synchronizer pulley and a second synchronizer pulley configured to rotate about a first axis. The second shaft assembly includes a third synchronizer pulley configured to rotate about a second axis. The third shaft assembly includes a fourth synchronizer pulley configured to rotate about a second axis. A first transmission assembly connects the first synchronizer pulley and the third synchronizer pulley. A second transmission assembly connects the second synchronizer pulley and the fourth synchronizer pulley.

[0009] In some embodiments, at least one of the first transmission assembly and the second transmission assembly is a synchronous belt.

[0010] In some embodiments, the clamping device further includes a motor assembly connected to the first rotating shaft assembly, wherein the motor assembly is configured to drive the first rotating shaft assembly to rotate about a first axis.

[0011] In some embodiments, the clamping device further includes one or more fixed seats. A first rotating shaft assembly, a second rotating shaft assembly, and a third rotating shaft assembly are pivotally connected to one or more fixed seats. A first pressure head is configured to move relative to one or more fixed seats.

[0012] In some embodiments, the clamping device further includes a base, a first fixed base, a second fixed base, a first drive device, and a slider. The slider is slidably connected to the base. The first fixed base is connected to the slider, and a first rotating shaft assembly and a second rotating shaft assembly are pivotally connected to the first fixed base. The second fixed base is connected to the base, and a first rotating shaft assembly and a third rotating shaft assembly are pivotally connected to the second fixed base. The first drive device is configured to push the slider, causing a first pressure head to move along a second axis toward a second pressure head.

[0013] In some embodiments, the first shaft assembly includes a splined shaft and a splined wheel. The splined shaft is pivotally connected to a second fixed base. The splined wheel surrounds the outside of the splined shaft. The splined wheel is slidably engaged with the splined shaft. The splined wheel is configured to rotate synchronously with the first and second transmission assemblies.

[0014] In some embodiments, the clamping device further includes a second drive unit connected to the first pressure head. The second drive unit is configured to drive the first pressure head to move along a second axis toward a second pressure head.

[0015] In summary, the clamping device of this application includes a first rotating shaft assembly that rotates around a first axis, a second rotating shaft assembly and a third rotating shaft assembly that rotate around a second axis, and a transmission assembly that links the above three components, enabling the multiple rotating shaft assemblies to rotate synchronously. In other words, the synchronous rotation of the rotating shaft assemblies between the first and second pressure heads eliminates torque, preventing damage to the internal structure of the multilayer lens clamped by the first and second pressure heads due to torque.

[0016] These and other aspects of this application will become apparent from the following description of preferred embodiments in conjunction with the accompanying drawings, but variations and modifications may be made therein without departing from the spirit and scope of the novel concept of this application. Attached Figure Description

[0017] The accompanying drawings illustrate one or more embodiments of the present application and, together with the written description, serve to explain the principles of the present application. Throughout the drawings, the same reference numerals are used wherever possible to refer to similar or identical components of the embodiments, wherein:

[0018] Figure 1 This is a perspective view of a clamping device according to an embodiment of this application.

[0019] Figure 2 This is a perspective view of the clamping device according to an embodiment of this application.

[0020] Figure 3 This is a perspective view of some components of a clamping device according to an embodiment of this application.

[0021] Figure 4A for Figure 2 The clamping device is viewed in cross section along section line 4-4.

[0022] Figure 4B for Figure 4A A cross-sectional view of the clamping device.

[0023] Figure 5 This is an exploded view of the second rotating shaft assembly, thrust bearing, first pressure head, and pressure sensor according to an embodiment of this application.

[0024] Figure 6 This is an exploded view of the third rotating shaft assembly and the second pressure head according to an embodiment of this application.

[0025] Figure 7A for Figure 1 The clamping device is viewed in cross section along section line 7-7.

[0026] Figure 7B for Figure 2 The clamping device is viewed in cross section along section line 7-7.

[0027] Figure 8 This is an exploded view of the first rotating shaft assembly according to an embodiment of this application.

[0028] Figure 9 for Figure 2 The clamping device is viewed in cross section along the cutting line 9-9.

[0029] Explanation of reference numerals in the attached figures:

[0030] X1: First axis line

[0031] X2: Second axis

[0032] 4-4, 7-7, 9-9: Cutting lines

[0033] 10: Clamping device

[0034] 100: First pivot assembly

[0035] 102: Gearbox

[0036] 110: Spline wheel

[0037] 120: Splined switch

[0038] 120a: Guide groove

[0039] 132: First Synchronization Wheel

[0040] 134: Second Synchronization Pulley

[0041] 140a, 140b: Couplings

[0042] 150: Transmission components

[0043] 160: Transmission components

[0044] 160a: Bearing

[0045] 170: Transmission components

[0046] 170a: Bearing

[0047] 180: Sliding groove

[0048] 200: Second pivot assembly

[0049] 210: Spline wheel

[0050] 220: Splined switch

[0051] 220a: Guide groove

[0052] 230a, 230b, 240: Transmission components

[0053] 250: Third Synchronizing Pulley

[0054] 260: Sliding groove

[0055] 300: Third pivot assembly

[0056] 310: Vacuum Adsorption Device

[0057] 320: Fourth Synchronization Pulley

[0058] 330: Transmission components

[0059] 330a: Bearing

[0060] 400: Base

[0061] 402: Slide rail

[0062] 410: Sliding component

[0063] 412: First fixed seat

[0064] 414: Second fixed seat

[0065] 510: First transmission assembly

[0066] 520: Second transmission assembly

[0067] 530: Auxiliary transmission wheel

[0068] 610: First pressure head

[0069] 620: Second pressure head

[0070] 700: Clamping Cylinder

[0071] 710: First clamping cylinder

[0072] 720: Second clamping cylinder

[0073] 722: Floating Joint

[0074] 730: Servo Motor

[0075] 800: Thrust bearing

[0076] 900: Pressure sensor

[0077] 910a, 910b: Sensing components Detailed Implementation

[0078] The following disclosure will now be described more fully with reference to the accompanying drawings and reference numerals, some of which illustrate exemplary embodiments. This application may be implemented in various forms and should not be limited to the embodiments mentioned below. However, these embodiments are provided to aid in a more complete understanding of the content of this application and to fully convey the scope of this application to those skilled in the art. The same reference numerals will refer to similar components throughout the text.

[0079] It should be noted that the accompanying drawings in this application are drawn to scale. To maintain the brevity of the specification, the scale of each component is not listed individually, but the scale and position of each component should be considered part of the content of this specification.

[0080] Furthermore, the terms "first," "second," and "third" used throughout this application are for the purpose of clearly describing the structure and position of each component, and do not represent the importance of the components or the order of connection. The term "connection" throughout this application can refer to a physically connected implementation or an implementation connected by one or more other components.

[0081] Please refer to Figure 1 . Figure 1 This is a perspective view of the clamping device 10 according to one embodiment of this application. Figure 1 As shown, in this embodiment, the clamping device 10 includes a first rotating shaft assembly 100, a second rotating shaft assembly 200, a third rotating shaft assembly 300, a first fixed base 412, a second fixed base 414, a first transmission assembly 510, a second transmission assembly 520, a first pressure head 610, a second pressure head 620, a clamping cylinder 700, and a servo motor 730. The first rotating shaft assembly 100, the second rotating shaft assembly 200, and the third rotating shaft assembly 300 are pivotally connected to one or more first fixed bases 412 and second fixed bases 414 (e.g., mounted on each fixed base via one or more bearings). The first pressure head 610 is disposed at one end of the second rotating shaft assembly 200. The second pressure head 620 is disposed at one end of the third rotating shaft assembly 300. The first pressure head 610 is opposite (directly opposite) the second pressure head 620 on a second axis X2. The clamping cylinder 700 is configured to provide a clamping force between the first pressure head 610 and the second pressure head 620 for clamping the lens. A servo motor 730 is connected to the first rotating shaft assembly 100 to drive the first rotating shaft assembly 100 to rotate about a first axis X1. The first rotating shaft assembly 100 and the second rotating shaft assembly 200 are connected by a first transmission assembly 510, allowing the first rotating shaft assembly 100 and the second rotating shaft assembly 200 to rotate synchronously. The first rotating shaft assembly 100 and the third rotating shaft assembly 300 are connected by a second transmission assembly 520, allowing the first rotating shaft assembly 100 and the third rotating shaft assembly 300 to rotate synchronously. More specifically, the second rotating shaft assembly 200 and the third rotating shaft assembly 300 rotate synchronously about a second axis X2, causing the first pressure head 610 and the second pressure head 620 to rotate synchronously on the second axis X2. Accordingly, the first pressure head 610 and the second pressure head 620 rotate synchronously without torque. In other words, when the first pressure head 610 moves toward the second pressure head 620 via the clamping cylinder 700 to clamp the lens, the lens will only be subjected to clamping force and will not be damaged by torque.

[0082] Please also refer to Figure 1 and Figure 2 . Figure 2This is a perspective view of a clamping device 10 according to an embodiment of this application. In this embodiment, the clamping device 10 further includes a base 400, a slider 410, and a slide rail 402. The slider 410 is slidably connected to the base 400 via the slide rail 402. A first clamping cylinder 710 is configured to provide a thrust (or clamping force) to drive the slider 410 to slide. The slider 410 can slide relative to the base 400 in a direction parallel to the first axis X1 and the second axis X2. A first fixing seat 412 is fixed to the slider 410. A second fixing seat 414 is fixed to the base 400. In other words, the first fixing seat 412 can slide relative to the second fixing seat 414. A second rotating shaft assembly 200 is pivotally connected to the first fixing seat 412. A third rotating shaft assembly 300 is pivotally connected to the second fixing seat 414. Figure 2 As shown, the sliding member 410 is driven to slide relative to the base 400 by the first clamping cylinder 710, which allows the second rotating shaft assembly 200 to move toward the third rotating shaft assembly 300. In other words, the first pressure head 610 can move toward the second pressure head 620 by the clamping force provided by the first clamping cylinder 710.

[0083] Please continue to refer to this. Figure 1 In some embodiments, the first axis X1 and the second axis X2 are substantially parallel. The distance between the first axis X1 and the second axis X2 can be any suitable distance. By adjusting the structure of the base 400, the first transmission assembly 510 and the second transmission assembly 520, the shafts of each rotating shaft assembly can be set in a suitable position and direction.

[0084] Please continue to refer to this. Figure 1 and Figure 2 In this embodiment, the first rotating shaft assembly 100 is simultaneously pivotally connected to both the first fixed base 412 and the second fixed base 414. The first rotating shaft assembly 100 includes at least a splined wheel 110 and a splined shaft 120. The splined wheel 110 (via one or more transmission members) is pivotally connected to the first fixed base 412. The splined shaft 120 (via one or more transmission members) is pivotally connected to the second fixed base 414. The splined wheel 110 is disposed around the outside of the splined shaft 120. The splined shaft 120 is located on a first axis X1. The splined wheel 110 and the splined shaft 120 are slidably connected by one or more sets of ribs and guide grooves parallel to the first axis X1. The splined wheel 110 is configured to transmit torque (e.g., torque provided by the servo motor 730). The splined wheel 110 and the first transmission assembly 510 rotate synchronously. When the splined wheel 110 rotates, it drives the splined shaft 120 to rotate. When the splined shaft 120 rotates, it drives the second transmission assembly 520 to rotate. The spline shaft 120 will not move relative to the second fixed seat 414 in the direction of the first axis X1. The spline wheel 110 will not move relative to the first fixed seat 412 in the direction of the first axis X1. Figure 2As shown, during the process of the first clamping cylinder 710 driving the sliding member 410 to slide and causing the first pressure head 610 to move toward the second pressure head 620, the components of the first rotating shaft assembly 100 mounted on the first fixed seat 412 (e.g., spline wheel 110) can relatively approach the second fixed seat 414 by sliding relative to the spline shaft 120 on the first axis X1.

[0085] Please continue to refer to this. Figure 1 and Figure 2 In this embodiment, the clamping device 10 further includes a second clamping cylinder 720. The second clamping cylinder 720 is connected to the first fixed base 412. The second rotating shaft assembly 200 includes a splined shaft 220 connected to the first pressure head 610. The second clamping cylinder 720 is connected to the splined shaft 220. In some embodiments, the second clamping cylinder 720 and the splined shaft 220 are connected by a bearing (e.g., a thrust bearing 800). The second clamping cylinder 720 can transmit clamping force through the splined shaft 220, causing the first pressure head 610 to move toward the second pressure head 620. More specifically, the second clamping cylinder 720 can push against the splined shaft 220, causing the first pressure head 610 to move and protrude relative to the first fixed base 412.

[0086] In some embodiments, the clamping device 10 clamps the lens only via the first clamping cylinder 710. In other embodiments, the clamping device 10 clamps the lens only via the second clamping cylinder 720. In other preferred embodiments, the clamping device 10 has both a first clamping cylinder 710 and a second clamping cylinder 720. The first clamping cylinder 710, also referred to as a "pre-clamping cylinder," is configured to move the first pressure head 610 toward the second pressure head 620 (e.g., ...). Figure 2 (As shown), but the lens is not clamped. Next, the second clamping cylinder 720 drives the first pressure head 610 to press against the second pressure head 620 to clamp the lens (see reference). Figure 4B In an embodiment that simultaneously has a first clamping cylinder 710 and a second clamping cylinder 720, the clamping force of the second clamping cylinder 720 is between 20N and 90N.

[0087] In some embodiments, such as Figure 1 and Figure 2 As shown, the first shaft assembly 100 includes a reducer 102 and a coupling 140a. The reducer 102 can adjust the torque force provided by the servo motor 730. The coupling 140a is used to connect the various transmission components and shafts located on the first axis X1.

[0088] In some embodiments, the servo motor 730 can be connected to any of the shaft assemblies. Since the first shaft assembly 100, the second shaft assembly 200, and the third shaft assembly 300 rotate synchronously via the first transmission assembly 510 and the second transmission assembly 520, connecting the servo motor 730 to any of the shaft assemblies can achieve "synchronous rotation" to eliminate torque. In a preferred embodiment, the servo motor 730 is connected to the first shaft assembly 100 to drive the first shaft assembly 100 to rotate. Since the first shaft assembly 100 is simultaneously connected to both the first transmission assembly 510 and the second transmission assembly 520, torque force can be transmitted more evenly, reducing errors generated during mechanical operation.

[0089] In some embodiments, the clamping cylinder 700 includes a first clamping cylinder 710 and a second clamping cylinder 720. The clamping cylinder 700 can be any drive device capable of providing clamping force, such as a cylinder, a stepper motor, or the like. The servo motor 730 can be any motor device capable of providing torque force. This application is not intended to limit the power source providing clamping force and torque force.

[0090] Please also refer to Figure 2 as well as Figure 3 . Figure 3 This is a perspective view of some components of the clamping device 10 according to one embodiment of this application. For clarity, Figure 3 Some components of the clamping device 10 are omitted. In this embodiment, the first rotating shaft assembly 100 includes a first synchronous pulley 132 and a second synchronous pulley 134. The second rotating shaft assembly 200 includes a third synchronous pulley 250. The third rotating shaft assembly 300 includes a fourth synchronous pulley 320. Figure 1 As shown, the first transmission assembly 510 connects the first synchronous pulley 132 and the third synchronous pulley 250. The second transmission assembly 520 connects the second synchronous pulley 134 and the fourth synchronous pulley 320. In this embodiment, both the first transmission assembly 510 and the second transmission assembly 520 are synchronous belts. That is, the synchronous belts can drive the synchronous pulleys to rotate synchronously, thereby driving the various rotating shaft assemblies to rotate synchronously.

[0091] In some embodiments, the first transmission assembly 510 and the second transmission assembly 520 are synchronous belts (e.g., Figure 1 and Figure 2 As shown), and the first transmission assembly 510 and the second transmission assembly 520 can each be connected to the auxiliary transmission wheel 530 (in Figure 2 and Figure 9(This can be clearly observed in the image). The auxiliary drive wheel 530 is located between two synchronous pulleys (e.g., between the first synchronous pulley 132 and the third synchronous pulley 250 and / or between the second synchronous pulley 134 and the fourth synchronous pulley 320). The auxiliary drive wheel 530 is configured to make the transmission of the first transmission assembly 510 and the second transmission assembly 520 more precise, further reducing gaps and errors.

[0092] In other embodiments, the first transmission assembly 510 and the second transmission assembly 520 are gears. That is, the first shaft assembly 100, the second shaft assembly 200, and the third shaft assembly 300 transmit torque through the meshing of multiple gears.

[0093] The structure of each component of the clamping device 10 of this application will be described in detail below. It should be noted that, for the sake of brevity, some conventional components, such as C-rings and screws, are omitted from the drawings of this application.

[0094] Please also refer to Figure 4A as well as Figure 5 . Figure 4A for Figure 2 A cross-sectional view of the clamping device 10 viewed along the section line 4-4. Figure 5 This is an exploded view of the second rotating shaft assembly 200, the first pressure head 610, the thrust bearing 800, and the pressure sensor 900 according to one embodiment of this application. In this embodiment, the first pressure head 610, the second rotating shaft assembly 200, the thrust bearing 800, and the pressure sensor 900 are arranged along a second axis X2 (see figure). Figure 1 The second rotating shaft assembly 200 includes a splined wheel 210, a splined shaft 220, a transmission component 230a, a transmission component 230b, a transmission component 240, and a third synchronous pulley 250. The splined wheel 210 is arranged around the outside of the splined shaft 220. The splined wheel 210 and the splined shaft 220 are connected along the second axis X2 (see...) via one or more sets of corresponding ribs and guide grooves (e.g., guide groove 220a). Figure 1 Sliding connection. Splined shaft 220 is connected to the first pressure head 610. Transmission members 230a and 230b are arranged around the outside of splined wheel 210. Transmission member 240 is connected around the outside of transmission members 230a and 230b. Transmission members 230a and 230b respectively have bearings 230a1 and 230b1 pivotally connected to the first fixed seat 412. Third synchronous pulley 250 is connected around the outside of transmission member 230b. The holes in the center of splined wheel 210, transmission member 230a, and transmission member 230b together form a sliding groove 260. Splined shaft 220 can slide in sliding groove 260, causing the first pressure head 610 to retract relative to the second pressure head 620 (see...). Figure 4A ) or highlight (see Figure 4BThe first transmission assembly 510 is configured to drive the third synchronous pulley 250 to rotate, causing the splined wheel 210, splined shaft 220, transmission components 230a, 230b, 240, and the first pressure head 610 to rotate synchronously. In short, in some embodiments, the second shaft assembly 200 simultaneously transmits torque and clamping force, the splined wheel 210 and multiple transmission components are configured to transmit torque from the third synchronous pulley 250 (i.e., torque from the first transmission assembly 510) to the first pressure head 610, while the splined shaft 220 is configured to transmit torque from the second clamping cylinder 720 (see...). Figure 1 The clamping force is applied to the first pressure head 610.

[0095] Please also refer to Figure 1 as well as Figure 4A In this embodiment, the second clamping cylinder 720 includes a floating joint 722. The clamping device 10 also includes a thrust bearing 800. The floating joint 722 is connected to the thrust bearing 800 and is configured to transmit the clamping force from the second clamping cylinder 720 and reduce the eccentricity or angle between the second clamping cylinder 720 and the thrust bearing 800. The thrust bearing 800 is configured to separate the torque force transmitted by the servo motor 730. In other words, the second clamping cylinder 720 connected to the thrust bearing 800 does not rotate synchronously with components such as the third synchronous pulley 250. Accordingly, the thrust bearing 800 separates the torque force from the clamping force, reducing the deviation that the second clamping cylinder 720 may cause due to the torque force when transmitting the clamping force.

[0096] Please also refer to Figure 1 and Figure 4B . Figure 4B for Figure 4A A cross-sectional view of the clamping device 10 clamping the components. In some embodiments, the second clamping cylinder 720 drives the sequentially connected floating joint 722, thrust bearing 800, splined shaft 220, and first pressure head 610 to move toward the second pressure head 620, and the first pressure head 610 can abut against the second pressure head 620. It can be observed that in the second rotating shaft assembly 200, the components other than the splined shaft 220 do not move with the push of the second clamping cylinder 720.

[0097] In some implementations... Figure 1 The clamping device 10 uses the first clamping cylinder 710 to bring the first pressure head 610 close to the second pressure head 620. After pre-clamping, Figure 4A The clamping device 10 can be further driven by the second clamping cylinder 720 to push the first pressure head 610 against the second pressure head 620 (e.g., Figure 4B (As shown). This two-step clamping process allows for more precise adjustment of the clamping force used to hold the lens.

[0098] In some embodiments, the clamping device 10 further includes a pressure sensor 900. The pressure sensor 900 is disposed between the second clamping cylinder 720 and the second rotating shaft assembly 200, for example, on the thrust bearing 800. The pressure sensor 900 is configured to sense the clamping force (pressure) transmitted along the second axis X2. When the pressure sensed by the pressure sensor 900 exceeds a threshold, the clamping device 10 is immediately stopped, allowing for timely adjustment of the parameters of the components of the clamping device 10.

[0099] In some embodiments, the thrust bearing 800 is configured to reduce the pressure load on the second shaft assembly 200 on the second axis X2. In other embodiments, the thrust bearing 800 can be any bearing used to separate torque force and clamping force.

[0100] Please also refer to Figure 4A as well as Figure 6 . Figure 6 This is an exploded view of the third rotating shaft assembly 300 and the second pressure head 620 according to an embodiment of this application. The third rotating shaft assembly 300 includes a vacuum adsorption device 310, a fourth synchronous wheel 320, and a transmission member 330. The vacuum adsorption device 310 is connected to the second pressure head 620, and the opening of the vacuum adsorption device 310 communicates with the surface of the second pressure head 620. The vacuum adsorption device 310 is configured to adsorb a lens, so that the lens is adsorbed onto the second pressure head 620. The transmission member 330 surrounds the vacuum adsorption device 310. The transmission member 330 includes one or more bearings 330a, which are configured to be pivotally connected to the second fixed seat 414. The fourth synchronous wheel 320 is connected to the outside of the transmission member 330. When the second transmission assembly 520 rotates the fourth synchronous wheel 320, the transmission member 330, the vacuum adsorption device 310, the second pressure head 620, and the lens rotate synchronously.

[0101] Please also refer to Figure 7A and Figure 8 . Figure 7A for Figure 1 A cross-sectional view of the clamping device 10 viewed along the cutting line 7-7. Figure 8This is an exploded view of a first shaft assembly 100 according to an embodiment of this application. The first shaft assembly 100 includes a reducer 102, a splined wheel 110, a splined shaft 120, a first synchronizer pulley 132, a second synchronizer pulley 134, one or more couplings 140a and 140b, a transmission member 150, a transmission member 160, and a transmission member 170. The splined wheel 110 is disposed around the outside of the splined shaft 120. The transmission member 150 is disposed around the outside of the splined wheel 110. The coupling 140a connects the transmission member 160 and the reducer 102. The coupling 140b connects the transmission member 150 and the transmission member 160. The transmission member 160 includes one or more bearings 160a for pivotally connecting the transmission member 160 to a first fixed seat 412. One end of the splined shaft 120 is connected to the transmission member 170. The transmission member 170 includes one or more bearings 170a pivotally connected to a second fixed seat 414. The first synchronous pulley 132 is circumferentially connected to the transmission member 160. The second synchronous pulley 134 is circumferentially connected to the transmission member 170. The splined shaft 120 and the splined pulley 110 are connected to the rib along the first axis X1 (see...) via guide grooves (e.g., guide groove 120a). Figure 1 Sliding connection.

[0102] Please also refer to Figure 7A as well as Figure 7B . Figure 7B for Figure 2 The clamping device is shown in cross-section along section line 7-7. The splined wheel 110, the transmission component 150, and the hole at the center of the transmission component 160 together form a sliding groove 180. When the first fixed seat 412 moves relative to the second fixed seat 414 (e.g., when the first clamping cylinder 710 is activated), the splined shaft 120 can slide in the sliding groove 180. In other words, during pre-clamping, components such as the transmission component 170, the splined shaft 120, and the second synchronous pulley 134 are configured to be fixed on the second fixed seat 414, while parts such as the splined wheel 110, the first synchronous pulley 132, and the reducer 102 move toward the components fixed on the second fixed seat 414.

[0103] Please also refer to Figure 1 as well as Figure 7A In some embodiments, the servo motor 730 is connected to the reducer 102. The servo motor 730 is configured to transmit torque to the first synchronous pulley 132 and the second synchronous pulley 134, so that the first synchronous pulley 132 and the second synchronous pulley 134 can rotate synchronously on the first axis X1.

[0104] Please refer to Figure 8 and Figure 9 . Figure 9 for Figure 2The clamping device 10 is viewed in cross-section along section line 9-9. In some embodiments, a sensing component 910a is provided on the transmission member 160. A corresponding sensing component 910b is provided on the slider 410. The sensing component 910a is disk-shaped and configured to rotate about a first axis X1. The sensing component 910b has at least one pair of infrared emitters and infrared sensors. The disk-shaped structure of the sensing component 910a is disposed between the infrared emitters and the infrared sensors of the sensing component 910b. The disk-shaped structure of the sensing component 910a has a notch. When the sensing component 910a rotates with the transmission member 160, the notch is periodically located between the infrared emitters and the infrared sensors. In other words, infrared light can periodically pass through the notch to allow the infrared sensors to sense a signal, thereby determining the rotational speed of the first rotating shaft assembly 100.

[0105] The following will detail the process of using the clamping device 10 to clamp the lens.

[0106] Please also refer to Figure 1 , Figure 2 and Figure 9 First, the lens is adsorbed onto the second pressure head 620 by the vacuum adsorption device 310. Next, the sliding member 410 is driven by the first clamping cylinder 710, causing it to slide relative to the base 400; in other words, the second rotating shaft assembly 200 slides towards the third rotating shaft assembly 300, bringing the first pressure head 610 closer to the second pressure head 620. The servo motor 730 rotates the first rotating shaft assembly 100, causing the first synchronous pulley 132 and the second synchronous pulley 134 to rotate synchronously. The first synchronous pulley 132 and the second synchronous pulley 134 respectively rotate the first transmission assembly 510 and the second transmission assembly 520. The first transmission assembly 510 and the second transmission assembly 520 respectively rotate the third synchronous pulley 250 and the fourth synchronous pulley 320, causing the second rotating shaft assembly 200 and the third rotating shaft assembly 300 to rotate synchronously; in other words, the first pressure head 610 and the second pressure head 620 rotate synchronously. Next, the second clamping cylinder 720 (via thrust bearing 800) pushes the spline shaft 220 (see reference). Figures 4A to 4B The first pressure head 610 is driven to clamp the lens between the first pressure head 610 and the second pressure head 620.

[0107] In some embodiments, such as Figure 9As shown, the first synchronizer pulley 132, the second synchronizer pulley 134, the third synchronizer pulley 250, and the fourth synchronizer pulley 320 are four synchronizer pulleys of substantially the same size. In other embodiments, the first synchronizer pulley 132 and the third synchronizer pulley 250 are substantially equal in size, the second synchronizer pulley 134 and the fourth synchronizer pulley 320 are substantially equal in size, while the first synchronizer pulley 132 and the second synchronizer pulley 134 are different in size. In embodiments where the first transmission assembly 510 and the second transmission assembly 520 are synchronous belts, the synchronous belt can be made of any suitable material, such as plastic, leather, etc., and this application is not intended to limit the material of the synchronous belt.

[0108] In summary, since the clamping device of this application includes a first rotating shaft assembly, a first transmission assembly, and a second transmission assembly, the second rotating shaft assembly and the third rotating shaft assembly can rotate synchronously, so that there is no relative torque between the first pressure head and the second pressure head, achieving the beneficial effect of "avoiding torque from damaging the internal structure of multi-layer lenses". Furthermore, since the clamping device of this application has a thrust bearing, it can achieve the separation and combination of clamping force and torque force.

[0109] The foregoing description is only for illustrating exemplary embodiments of this application and is not intended to exhaustively describe or limit the precise form of the invention disclosed herein. The above content may be modified or varied.

[0110] The selected and illustrated embodiments are intended to explain the content of this application and their practical application, thereby inspiring other skilled in the art to utilize this application and various embodiments, and to make various modifications to suit a particular intended use. Alternative embodiments will be apparent to those skilled in the art without departing from the spirit and scope of this application. Therefore, the scope of this application is determined by the scope of the claims, and not by the foregoing description and the exemplary embodiments described therein.

Claims

1. A clamping device, characterized in that comprises a first spline shaft and a first spline wheel; a second rotation shaft assembly configured to rotate around a second axis; a first pressing head disposed at one end of the second rotation shaft assembly; a first transmission assembly configured to synchronously rotate the first rotation shaft assembly and the second rotation shaft assembly; a third rotation shaft assembly configured to rotate around the second axis; a second pressing head disposed at one end of the third rotation shaft assembly and opposite to the first pressing head; and a second transmission assembly configured to synchronously rotate the first rotation shaft assembly and the third rotation shaft assembly; wherein one of the first pressing head and the second pressing head is configured to move along the second axis towards the other of the first pressing head and the second pressing head; wherein the clamping device further comprises a base, a first fixed seat, a second fixed seat, a first driving device, a second driving device, and a sliding member, the sliding member is in sliding engagement with the base, the first fixed seat is connected to the sliding member, and the first rotation shaft assembly and the second rotation shaft assembly are pivoted to the first fixed seat, the second fixed seat is connected to the base, and the first rotation shaft assembly and the third rotation shaft assembly are pivoted to the second fixed seat, the first driving device is configured to push the sliding member to move the first pressing head along the second axis towards the second pressing head, and the second driving device is connected to the first pressing head and is configured to drive the first pressing head to move along the second axis towards the second pressing head. The clamping device further comprises a bearing, the second driving device is in engagement with the second rotation shaft assembly via the bearing and is configured to drive the first pressing head to move along the second axis via the second rotation shaft assembly. The second rotation shaft assembly comprises a second spline shaft and a second spline wheel; 2. The clamping device of claim 1, wherein wherein the second spline wheel surrounds the outside of the second spline shaft; 3. The clamping device of claim 2, wherein the second spline wheel and the second spline shaft are in sliding engagement in a direction parallel to the second axis; the second spline wheel is connected to the first transmission assembly and is configured to rotate synchronously with the first transmission assembly; the second driving device is connected to the first pressing head via the second spline shaft. The first rotation shaft assembly comprises a first synchronous wheel and a second synchronous wheel configured to rotate around the first axis; The second rotation shaft assembly comprises a third synchronous wheel configured to rotate around the second axis; 4. The holding device of claim 1, wherein The third rotation shaft assembly comprises a fourth synchronous wheel configured to rotate around the second axis; The first transmission assembly is connected to the first synchronous wheel and the third synchronous wheel; The second transmission assembly is connected to the second synchronous wheel and the fourth synchronous wheel. At least one of the first transmission assembly and the second transmission assembly is a synchronous belt. The clamping device further comprises a motor device connected to the first rotation shaft assembly, wherein the motor device is configured to drive the first rotation shaft assembly to rotate around the first axis.

5. The holding device of claim 1, wherein 7. The clamping device of claim 1, wherein 6. The clamping device of claim 1, wherein the first pressing head is configured to move relative to the first fixed seat. ​ ​ 8. The clamping device of claim 1, wherein: the first spline shaft is pivotally coupled to the second fixed base; the first spline ring is disposed around an outer side of the first spline shaft; the first spline ring is slidingly engaged with the first spline shaft; the first spline ring is configured to rotate in synchronization with the first transmission assembly and the second transmission assembly.

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