A centering fixture

Abstract

This utility model relates to the field of tooling and fixture technology, specifically a centering fixture, comprising a clamping mechanism mounted on a base plate and a push rod slidably mounted on the base plate; the clamping mechanism includes a fixed base, a clamping assembly rotatably mounted on the fixed base, and a traction component; during operation, the push rod pushes the clamping assembly to rotate, causing the clamping assembly to release the workpiece; after the push rod releases the clamping assembly, the traction component drives the clamping assembly to reset, so that the clamping assembly clamps the workpiece; this centering fixture has a simple overall structure, achieving normal clamping without additional drive or power, reducing external power consumption, and avoiding workpiece damage caused by uncontrolled external drive; when the push rod pushes the clamping assembly to rotate within the fixed base to release the workpiece, and when it is necessary to continue clamping the workpiece, the traction component drives the clamping assembly to reset, eliminating the need for other drive operations, reducing unnecessary clamping actions, improving workpiece loading and unloading efficiency, and enhancing the overall stability and speed of operation.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically a centering fixture. Background Technology

[0002] Currently, the conventional centering and clamping method for resin lens workpieces still uses a multi-point threaded structure for clamping and fixing. This method is usually time-consuming and labor-intensive, and the lens is subjected to uneven force, which can easily cause damage and contamination to the lens. In addition, such clamping devices usually require a separate external pneumatic drive component for operation. In precision operation scenarios such as lens processing, the large number of drive components and circuits makes the structure more complex and the operation more cumbersome, which also poses more risks to the processing and manufacturing of lenses. There is an urgent need to develop a technical solution to address the aforementioned technical problems. Utility Model Content

[0003] The purpose of this utility model is to provide a centering fixture that enables normalized clamping, reduces external power consumption, and provides controllable clamping force to avoid damage to the lens workpiece caused by uncontrolled external drive, thereby improving the efficiency of workpiece loading and unloading and enhancing the overall stability and speed of operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution; A centering clamp includes a clamping mechanism mounted on a base plate and a push rod slidably mounted on the base plate; the clamping mechanism includes a fixed base, a clamping assembly rotatably mounted on the fixed base, and a traction component; During operation, the push rod pushes the clamping assembly to rotate, causing the clamping assembly to release the workpiece; after the push rod releases the clamping assembly, the traction component drives the clamping assembly to reset, so that the clamping assembly clamps the workpiece.

[0005] Furthermore, the clamping assembly includes a rotating sleeve rotatably mounted on a fixed base and a plurality of clamping claws mounted on the rotating sleeve; the plurality of clamping claws form a clamping space; the clamping claws are rotatably mounted on the rotating sleeve using a fixed shaft; During operation, the push rod pushes the rotating sleeve to rotate, and the rotation of the rotating sleeve causes the clamping jaws to rotate around the fixed axis to expand the clamping space range so that the clamping jaws can release the workpiece; After the push rod releases the thrust, the traction component drives the rotating sleeve to reset. The rotating sleeve rotates, causing the clamping jaws to rotate around the fixed axis to reduce the clamping space range, so that the clamping jaws can clamp the workpiece.

[0006] Furthermore, the end of the gripping claw is provided with a fulcrum, and the fixed base is provided with a movable groove for limiting the range of motion of the fulcrum; The fulcrum extends into the movable groove. When the rotating sleeve rotates, it drives the clamping claw and the fixed shaft to move together. The fulcrum abuts against the inner wall of the movable groove, thereby causing the clamping claw to rotate around the fixed shaft to change the range of the clamping space.

[0007] Furthermore, the fixed base is provided with a guide block, and the outer peripheral surface of the rotating sleeve is provided with a rotating groove for assembling the guide block.

[0008] Furthermore, a placement groove is provided through the middle of the outer peripheral surface of the fixed base, a fixed column is provided inside the placement groove, and a fixing buckle is provided on the outer peripheral surface of the rotating sleeve; one end of the traction component is connected to the fixed column, and the other end of the traction component is connected to the fixing buckle.

[0009] Furthermore, a wedge-shaped block is provided on the rotating sleeve, and a roller is provided at the end of the push rod; when the push rod moves, the roller contacts and pushes the wedge-shaped block to drive the rotating sleeve to rotate within the fixed seat.

[0010] Furthermore, it also includes a push rod reset assembly, which includes a limiting block mounted on the base plate, a spring block mounted on the push rod, and a reset spring connecting the limiting block and the spring block; the two ends of the reset spring respectively abut against the limiting block and the spring block, and one end of the push rod slides through the limiting block; During operation, the reset spring pushes the return block, which in turn drives the push rod to reset.

[0011] Furthermore, the base plate is provided with a limiting groove, and the limiting block is installed in the limiting groove. When the spring returns to its original position, the limiting groove is used to block the spring block pushed by the return spring.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This centering fixture has a simple overall structure. Under the traction of the traction component, the clamping assembly is normally in a clamping action, achieving long-term clamping without the need for a drive or power component, reducing external power consumption. The clamping force is controllable, avoiding workpiece damage caused by uncontrolled external drive. Under the action of external force, the push rod pushes the clamping assembly to rotate within the fixed seat, causing the clamping assembly to release the workpiece for related operations. When it is necessary to continue clamping the workpiece, simply release the external force of the push rod, and the traction component drives the clamping assembly to reset, without the need for other drive operations. This reduces unnecessary clamping actions, improves the efficiency of workpiece loading and unloading, and enhances the overall stability and speed of operation. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is an exploded structural diagram of the clamping mechanism; Figure 4 This is a three-dimensional structural diagram of the clamping mechanism. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] refer to Figure 1-4 As shown, this utility model provides a centering clamp, including a base plate 11, a clamping mechanism 13 mounted on the base plate 11, and a push rod 12 slidably mounted on the base plate 11; the clamping mechanism 13 includes a fixed seat 131, a clamping assembly 132 rotatably mounted on the fixed seat 131, and a traction component 134. During operation, the push rod 12 pushes the clamping assembly 132 to rotate, causing the clamping assembly 132 to release the workpiece 2; after the push rod 12 releases the clamping assembly 132, the traction component 134 drives the clamping assembly 132 to reset, so that the clamping assembly 132 clamps the workpiece 2.

[0016] Specifically, the push rod 12 is a transmission component that can convert human power or other forms of power into linear motion to contact and push the clamping assembly 132; the traction component 134 can be a component with elastic potential energy, such as a spring, elastic rubber strip or elastic rope.

[0017] This centering fixture has a simple overall structure. Under the traction of the traction component 134, the clamping component 132 is normally in a clamping action, which can achieve long-term clamping without the need for a drive or power component, reducing external power consumption. Moreover, the clamping force is controllable, avoiding damage to the workpiece caused by uncontrolled external drive. Under the action of external force, the push rod 12 pushes the clamping component 132 to rotate within the fixed base 131 so that the clamping component 132 releases the workpiece 2 so that related operations on the workpiece 2 can be performed. When it is necessary to continue clamping the workpiece 2, it is only necessary to release the external force of the push rod 12, and the traction component 134 drives the clamping component 132 to reset. No other drive operation is required, reducing unnecessary clamping actions, improving the loading and unloading efficiency of the workpiece 2, and improving the overall stability and speed of operation.

[0018] In this embodiment, the clamping assembly 132 includes a rotating sleeve 1321 rotatably mounted on the fixed base 131 and a plurality of clamping claws 1322 mounted on the rotating sleeve 1321; the plurality of clamping claws 1322 form a clamping space; the clamping claws 1322 are rotatably mounted on the rotating sleeve 1321 by means of a fixed shaft 1323; During operation, push rod 12 pushes rotating sleeve 1321 to rotate. Rotating sleeve 1321 counterclockwise drives clamping claw 1322 to expand the clamping space around fixed shaft 1323, so that clamping claw 1322 releases the workpiece 2. After push rod 12 releases the thrust, traction component 134 drives rotating sleeve 1321 to reset. Rotating sleeve 1321 clockwise drives clamping claw 1322 to shrink the clamping space around fixed shaft 1323, so that clamping claw 1322 clamps the workpiece 2.

[0019] Specifically, the preferred number of clamping claws 1322 is three, which are evenly distributed in a circle around the rotating sleeve 1321. When the rotating sleeve 1321 rotates, the clamping claws 1322 rotate around the fixed shaft 1323 to contact or release the workpiece 2. The evenly spaced multi-point clamping action can effectively disperse the force, and the evenly spaced circumferential distribution can adapt to workpieces of various diameters.

[0020] In this embodiment, the end of the clamping claw 1322 is provided with a fulcrum portion 1324, and the fixed base 131 is provided with a movable groove 1311 for limiting the range of motion of the fulcrum portion 1324. The fulcrum portion 1324 extends into the movable groove 1311. When the rotating sleeve 1321 rotates, it drives the clamping claw 1322 and the fixed shaft 1323 to move together. The fulcrum portion 1324 abuts against the inner wall of the movable groove 1311, thereby causing the clamping claw 1322 to rotate about the fixed shaft 1323 as the axis to change the range of the clamping space.

[0021] Specifically, during the release and clamping actions, the fixed shaft 1323 moves along with the rotating sleeve 1321. At this time, the fulcrum 1324 serves as the fulcrum for the clamping claw 1322 based on the lever principle, and the fulcrum 1324 moves within a limited range within the movable groove 1311. When the rotating sleeve 1321 rotates clockwise or counterclockwise, the clamping claw 1322 moves, and the fulcrum 1324 abuts against the inner wall of the movable groove 1311, causing the clamping claw 1322 to rotate around the fixed shaft 1323, thus moving the other end of the clamping claw 1322 and achieving the clamping or release of the workpiece 2. Multiple clamping claws 1322 use the lever principle to achieve point-contact clamping and release of the workpiece 2, reducing the contact area with the workpiece 2, reducing the probability of contamination and damage, and improving the overall lens processing efficiency and quality.

[0022] In this embodiment, the fixed base 131 is provided with a guide block 1312, and the outer peripheral surface of the rotating sleeve 1321 is provided with a rotating groove 1325 for assembling the guide block 1312. Specifically, the rotatable groove 1323 of the guide block 1312 enables the fixed base 131 and the rotating sleeve 1321 to achieve stable rotation, improving the overall smoothness of the fixture's use.

[0023] In this embodiment, a placement groove 1313 is provided through the middle of the outer peripheral surface of the fixed base 131, and a fixed post 1314 is provided inside the placement groove 1313. A fixing buckle 1326 is provided on the outer peripheral surface of the rotating sleeve 1321. One end of the traction component 134 is connected to the fixed post 1314, and the other end of the traction component 134 is connected to the fixing buckle 1326.

[0024] Specifically, the placement slot 1313 is designed to avoid obstruction, ensuring that the traction component 134 can be installed discreetly and safely, avoiding unnecessary wear.

[0025] In this embodiment, a wedge block 1327 is provided on the rotating sleeve 1321, and a roller 121 is provided at the end of the push rod 12; when the push rod 12 moves, the roller 121 contacts and pushes the wedge block 1327 to drive the rotating sleeve 1321 to rotate within the fixed seat 131.

[0026] Specifically, the wedge-shaped ramp of the wedge block 1327 can change the pushing direction of the push rod 12, thereby providing power for the rotation of the rotating sleeve 1321. The push roller 121 can further reduce the translational contact to the rolling point contact, reduce friction, improve the smoothness of pushing, reduce wear and tear, reduce maintenance and repair cycle, and improve the overall user experience.

[0027] In this embodiment, a push rod reset assembly 14 is also included. The push rod reset assembly 14 includes a limiting block 141 mounted on the base plate 11, a spring block 142 mounted on the push rod 12, and a reset spring 143 connecting the limiting block 141 and the spring block 142. The two ends of the reset spring 143 abut against the limiting block 141 and the spring block 142 respectively, and one end of the push rod 12 slides through the limiting block 141. During operation, the reset spring 143 pushes the spring block 142 to drive the push rod 12 to reset.

[0028] Specifically, when the workpiece 2 needs to be released, the push rod 12 is pushed by an external force. When the external force on the push rod 12 is removed, the reset spring 143 in the reset assembly 14 can push the return block 142 to quickly push the push rod 12 out and reset it. It does not rely on external force for reciprocating motion, further simplifying the driving form and reducing the overall operation complexity.

[0029] In this embodiment, the base plate 11 is provided with a limiting groove 111, and the limiting block 141 is installed in the limiting groove 111. During the springback reset, the limiting groove 111 is used to block the springback block 142 pushed by the reset spring 143. Specifically, the limiting groove 111 is a recessed groove, which is used to install the limiting block 141 while blocking the springback block 142, thus avoiding unnecessary vibration and shaking of the reset spring 143 during the reset action.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by the spirit of this utility model.

Claims

1. A centering fixture, characterized in that, It includes a base plate (11), a clamping mechanism (13) mounted on the base plate (11), and a push rod (12) slidably mounted on the base plate (11); the clamping mechanism (13) includes a fixed base (131), a clamping assembly (132) rotatably mounted on the fixed base (131), and a traction component (134). During operation, the push rod (12) pushes the clamping assembly (132) to rotate, causing the clamping assembly (132) to release the workpiece (2); after the push rod (12) releases the clamping assembly (132), the traction component (134) drives the clamping assembly (132) to reset, so that the clamping assembly (132) clamps the workpiece (2). The clamping assembly (132) includes a rotating sleeve (1321) rotatably mounted on a fixed base (131) and a plurality of clamping claws (1322) mounted on the rotating sleeve (1321); the plurality of clamping claws (1322) form a clamping space; the clamping claws (1322) are rotatably mounted on the rotating sleeve (1321) by means of a fixed shaft (1323); During operation, the push rod (12) pushes the rotating sleeve (1321) to rotate. The rotation of the rotating sleeve (1321) drives the clamping claw (1322) to rotate around the fixed shaft (1323) to expand the clamping space range so that the clamping claw (1322) can release the workpiece (2). After the push rod (12) releases the thrust, the traction component (134) drives the rotating sleeve (1321) to reset. The rotating sleeve (1321) rotates and drives the clamping claw (1322) to rotate around the fixed shaft (1323) to reduce the clamping space range so that the clamping claw (1322) clamps the workpiece (2).

2. A centering fixture according to claim 1, characterized in that, The end of the gripper (1322) is provided with a fulcrum (1324), and the fixed base (131) is provided with a movable groove (1311) for limiting the range of motion of the fulcrum (1324). The fulcrum (1324) extends into the movable groove (1311). When the rotating sleeve (1321) rotates, it drives the clamping claw (1322) and the fixed shaft (1323) to move together. The fulcrum (1324) abuts against the inner wall of the movable groove (1311), thereby causing the clamping claw (1322) to rotate around the fixed shaft (1323) to change the range of the clamping space.

3. A centering fixture according to claim 1, characterized in that, The fixed base (131) is provided with a guide block (1312), and the outer peripheral surface of the rotating sleeve (1321) is provided with a rotating groove (1325) for assembling the guide block (1312).

4. A centering fixture according to claim 1, characterized in that, A placement groove (1313) is provided through the middle of the outer periphery of the fixed seat (131), and a fixed post (1314) is provided inside the placement groove (1313). A fixing buckle (1326) is provided on the outer periphery of the rotating sleeve (1321). One end of the traction component (134) is connected to the fixed post (1314), and the other end of the traction component (134) is connected to the fixing buckle (1326).

5. A centering fixture according to claim 1, characterized in that, The rotating sleeve (1321) is provided with a wedge block (1327), and the end of the push rod (12) is provided with a roller (121); when the push rod (12) moves, the roller (121) contacts and pushes the wedge block (1327) to drive the rotating sleeve (1321) to rotate in the fixed seat (131).

6. A centering fixture according to claim 1, characterized in that, It also includes a push rod reset assembly (14), which includes a limiting block (141) mounted on the base plate (11), a spring block (142) mounted on the push rod (12), and a reset spring (143) connecting the limiting block (141) and the spring block (142); the two ends of the reset spring (143) abut against the limiting block (141) and the spring block (142) respectively, and one end of the push rod (12) slides through the limiting block (141); During operation, the reset spring (143) pushes the return block (142) to drive the push rod (12) to reset.

7. A centering fixture according to claim 6, characterized in that, The base plate (11) is provided with a limiting groove (111), and the limiting block (141) is installed in the limiting groove (111). When the spring returns to its original position, the limiting groove (111) is used to block the spring block (142) pushed by the return spring (143).

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