A permanent magnet chuck adaptive clamping structure for multi-specification workpieces

Abstract

This utility model relates to the field of permanent magnet chuck technology and discloses a multi-specification workpiece adaptive clamping structure for a permanent magnet chuck, including a base, a permanent magnet chuck body on the top of the base, and an adjustment component on the inner side of the base. Several clamping mechanisms are evenly distributed on the surface of the adjustment component. This novel solution effectively uses several springs to extend and retract several first and second rods in the horizontal direction, while the springs provide preload. The ball bearings contact the edge of the workpiece, effectively reducing frictional resistance during contact. Since each clamping mechanism exists independently, it can automatically adapt to dimensional tolerances, flatness errors, or minor deformations on the workpiece surface, eliminating the need for frequent replacement of limit fixtures, reducing equipment adjustment time, and improving the versatility of the production line. When a damaged clamping mechanism needs to be replaced, it can be easily removed by disassembling the relevant hexagonal nuts after separating the positioning plate from the slot frame.

Description

Technical Field

[0001] This utility model belongs to the field of permanent magnet chuck technology, specifically a permanent magnet chuck adaptive clamping structure for multi-specification workpieces. Background Technology

[0002] Permanent magnet chucks, also known as magnetic chucks, are magnetic clamps widely used in machining fields such as machine shops and mold factories. They can greatly improve the clamping efficiency of magnetically conductive steel materials. To better limit the workpiece's position, existing permanent magnet chucks often include auxiliary clamping structures to horizontally restrict the workpiece.

[0003] Existing permanent magnet chuck-assisted clamping structures require changing clamps of different specifications for different workpieces, which increases mold costs. At the same time, changing clamps is time-consuming and labor-intensive. To address this, we propose a permanent magnet chuck-based adaptive clamping structure for multi-specification workpieces. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a multi-specification workpiece adaptive clamping structure for permanent magnet chucks, which effectively solves the problem that the existing permanent magnet chuck auxiliary clamping structure requires changing different specifications of clamps for different specifications of workpieces, resulting in increased mold costs, and the clamp replacement is time-consuming and labor-intensive.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a permanent magnet chuck adaptive clamping structure for multi-specification workpieces, comprising a base, a permanent magnet chuck body on the top of the base, an adjustment component on the inner side of the base, and a plurality of clamping mechanisms evenly distributed on the surface of the adjustment component. Each clamping mechanism includes a first rod, which is movably engaged with the inner side of the adjustment component. An auxiliary block is fixedly provided at one end of the first rod, and a ball is movably engaged inside the auxiliary block. A second rod is fixedly connected to the end of the first rod away from the auxiliary block, and a spring is movably sleeved on the outside of the second rod. A hexagonal nut is screwed onto the outer side of the smaller diameter end of the second rod.

[0006] Preferably, two-thirds of the ball is engaged inside the auxiliary block, and the ball can rotate and roll freely inside the auxiliary block.

[0007] Preferably, the distance between adjacent first rods is 10mm, and the first rods form an elastic structure through the second rod, spring and adjustment assembly.

[0008] Preferably, the adjusting assembly includes a positive and negative lead screw, which is mounted in the middle of the base. One end of the positive and negative lead screw is connected to a motor. A set of movable rods are symmetrically sleeved on the surface of the positive and negative lead screws. A set of guide slide rods are symmetrically fixed on both sides of the movable rods. A guide slide groove is attached to the outer side of the guide slide rod. A slot frame is fixed between the tops of the set of guide slide rods. A positioning plate is matched and attached to one side of the slot frame. The slot frame and the positioning plate are connected by two sets of bolts.

[0009] Preferably, the positive and negative lead screws are threadedly connected to the movable rod, and the movable rod forms an engaging sliding structure with the guide slide rod and the guide slide groove, and the guide slide groove and the base are integrally formed.

[0010] Preferably, several of the first rods and second rods are movably engaged inside the positioning plate and the slot frame, respectively.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. By setting several springs, several first and second rods can be effectively extended and retracted in the horizontal direction. At the same time, the springs provide preload force, and the balls contact the edge of the workpiece. The balls effectively reduce the frictional resistance when in contact with the workpiece. Since each clamping mechanism exists independently, it can automatically adapt to the dimensional tolerances, flatness errors, or minor deformations of the workpiece surface. There is no need to frequently change the limit fixtures, reducing equipment adjustment time and improving the versatility of the production line. When it is necessary to replace a damaged clamping mechanism, the relevant hexagonal nuts can be removed after the positioning plate is separated from the slot frame, which is quite convenient.

[0013] 2. By setting the motor to effectively drive the positive and negative lead screws to rotate, a set of movable rods on the surface of the positive and negative lead screws will move closer or further apart, thereby adjusting the distance between a set of slot frames and providing auxiliary force for several clamping mechanisms. The slot frame and the positioning plate can be separated by removing the bolts, so that the spring can be exposed for easy replacement later. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0018] Figure 3This is a partial cross-sectional structural diagram of the adjustment component of this utility model;

[0019] Figure 4 This is a partial cross-sectional structural diagram of the clamping mechanism of this utility model.

[0020] In the diagram: 1. Base; 2. Permanent magnet chuck body; 3. Adjustment assembly; 301. Positive and negative lead screws; 302. Motor; 303. Movable rod; 304. Guide slide rod; 305. Guide slide groove; 306. Slot frame; 307. Positioning plate; 308. Bolt; 4. Clamping mechanism; 401. First rod body; 402. Auxiliary block; 403. Ball bearing; 404. Second rod body; 405. Spring; 406. Hexagonal nut. Detailed Implementation

[0021] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4A multi-specification workpiece adaptive clamping structure for a permanent magnet chuck includes a base 1, a permanent magnet chuck body 2 on the top of the base 1, an adjustment assembly 3 on the inner side of the base 1, and several clamping mechanisms 4 evenly distributed on the surface of the adjustment assembly 3. Each clamping mechanism 4 includes a first rod 401, which is movably engaged with the inner side of the adjustment assembly 3. An auxiliary block 402 is fixedly attached to one end of the first rod 401, and a ball bearing 403 is movably engaged inside the auxiliary block 402. Two-thirds of the ball bearing 403 is engaged inside the auxiliary block 402, allowing it to rotate and roll freely within the auxiliary block 402. A second rod 404 is fixedly connected to the end of the first rod 401 away from the auxiliary block 402, and a spring 405 is movably sleeved on the outside of the second rod 404. Furthermore, the distance between adjacent first rods 401 is 10mm. The second rod 404, spring 405, and adjusting assembly 3 form an elastic structure. A hexagonal nut 406 is screwed onto the outer side of the small diameter end of the second rod 404. By setting several springs 405, several first rods 401 and second rods 404 can be effectively extended and retracted in the horizontal direction. At the same time, the springs 405 provide preload. The ball bearing 403 contacts the edge of the workpiece, which effectively reduces the frictional resistance when in contact with the workpiece. Since each clamping mechanism 4 exists independently, it can automatically adapt to the dimensional tolerances, flatness errors, or minor deformations of the workpiece surface. There is no need to frequently replace the limit fixture, reducing equipment adjustment time and improving the versatility of the production line. When it is necessary to replace a damaged clamping mechanism 4, the relevant hexagonal nut 406 can be removed after the positioning plate 307 is separated from the slot frame 306, which makes the clamping mechanism 4 easy to remove.

[0023] Adjustment component 3 includes a positive and negative lead screw 301, which is mounted in the middle of the base 1. One end of the positive and negative lead screw 301 is connected to a motor 302. A set of movable rods 303 are symmetrically sleeved on the surface of the positive and negative lead screw 301. A set of guide slide rods 304 are symmetrically fixed on both sides of the movable rods 303. A guide slide groove 305 is attached to the outer side of the guide slide rods 304. The positive and negative lead screw 301 and the movable rods 303 are threaded together. The movable rods 303 form a locking and sliding structure with the guide slide rods 304 and the guide slide groove 305. The guide slide groove 305 is integrally formed with the base 1. A slot frame 306 is fixedly connected between the tops of the set of guide slide rods 304. The positioning plate 307 is fitted to the slot. Furthermore, several first rods 401 and second rods 404 are respectively movably engaged inside the positioning plate 307 and the slot frame 306. The slot frame 306 and the positioning plate 307 are connected by two sets of bolts 308. The motor 302 effectively drives the positive and negative lead screws 301 to rotate, thereby causing a set of movable rods 303 on the surface of the positive and negative lead screws 301 to move closer or further away from each other, thereby adjusting the distance between a set of slot frames 306 and providing auxiliary force for several clamping mechanisms 4. The slot frame 306 and the positioning plate 307 can be separated by removing the bolts 308, thereby exposing the spring 405 for easy replacement later.

Claims

1. A permanent magnet chuck adaptive clamping structure for multi-specification workpieces, characterized in that: The device includes a base (1), a permanent magnet chuck body (2) on the top of the base (1), an adjustment component (3) on the inner side of the base (1), and a plurality of clamping mechanisms (4) evenly distributed on the surface of the adjustment component (3). The clamping mechanism (4) includes a first rod (401), which is movably engaged with the inner side of the adjustment component (3). An auxiliary block (402) is fixedly provided at one end of the first rod (401), and a ball bearing (403) is movably engaged inside the auxiliary block (402). A second rod (404) is fixedly connected at the end of the first rod (401) away from the auxiliary block (402). A spring (405) is movably sleeved on the outside of the second rod (404), and a hexagonal nut (406) is screwed onto the outer side of the small diameter end of the second rod (404).

2. The adaptive clamping structure for multi-specification workpieces using a permanent magnet chuck according to claim 1, characterized in that: Two-thirds of the ball (403) is engaged inside the auxiliary block (402), and the ball (403) can rotate and roll freely inside the auxiliary block (402).

3. The adaptive clamping structure for multi-specification workpieces using a permanent magnet chuck according to claim 1, characterized in that: The distance between adjacent first rods (401) is 10mm. The first rod (401) forms an elastic structure through the second rod (404), spring (405) and adjustment component (3).

4. The adaptive clamping structure for multi-specification workpieces using a permanent magnet chuck according to claim 1, characterized in that: The adjustment component (3) includes a positive and negative lead screw (301), which is mounted on the middle of the base (1). One end of the positive and negative lead screw (301) is connected to a motor (302). A set of movable rods (303) are symmetrically sleeved on the surface of the positive and negative lead screw (301). A set of guide slide rods (304) are symmetrically fixed on both sides of the movable rods (303). A guide slide groove (305) is attached to the outside of the guide slide rods (304). A slot frame (306) is fixed between the tops of the set of guide slide rods (304). A positioning plate (307) is matched and attached to one side of the slot frame (306). The slot frame (306) and the positioning plate (307) are connected by two sets of bolts (308).

5. The adaptive clamping structure for multi-specification workpieces using a permanent magnet chuck according to claim 4, characterized in that: The positive and negative lead screws (301) and the movable rod (303) are connected by threads. The movable rod (303) forms a locking and sliding structure with the guide slide rod (304) and the guide slide groove (305). The guide slide groove (305) and the base (1) are integrally formed.

6. The adaptive clamping structure for multi-specification workpieces using a permanent magnet chuck according to claim 4, characterized in that: Several of the first rods (401) and the second rods (404) are respectively movably engaged inside the positioning plate (307) and the slot frame (306).

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