A double toggle clamp mechanism

Abstract

The utility model discloses a double elbow lever clamping mechanism relates to the technical field of automobile production mechanical equipment, including drive cylinder, the top fixed connection of drive cylinder has the positioning frame, the outside of positioning frame is equipped with two first limit slot, the inside rotation of positioning frame is connected with two clamping plate, one side fixed connection of clamping plate has the butt joint seat, the inner chamber bottom fixed connection of butt joint seat has first attractive magnet, the outside of positioning frame is equipped with two second limit slot, the top fixed connection of drive cylinder has the limit slide, the outside of limit slide with first limit slot is contacted, this double elbow lever clamping mechanism, the structure design is reasonable, can be to the clamping mechanism movement process and is positioned and is guided, prevents the clamping mechanism and produces the shaking, can when needing to the clamping of special-shaped workpiece or cylindrical workpiece, installs fast to V type clamping plate, makes the device can to the clamping of special-shaped workpiece or cylindrical workpiece.

Description

Technical Field

[0001] This utility model relates to the field of automobile production machinery and equipment technology, specifically a double elbow clamping mechanism. Background Technology

[0002] Mechanical clamping mechanisms in automobile production are key devices used to precisely fix car bodies or parts during welding, assembly, or machining. They are typically driven by cylinders / hydraulic cylinders, converting power into high-rigidity clamping force through linkages, wedges, or cam mechanisms. Their core features are rapid response (completing the action within 0.5 to 2 seconds), repeatability of positioning accuracy of ±0.1mm, and self-locking function (such as a wedge force-amplifying structure that can amplify the force by 3 to 5 times). Modern clamping mechanisms integrate sensors and PLC control, providing real-time feedback on clamping status (pressure threshold adjustable from 15 to 200 bar), and adapting to multi-model switching in flexible production lines (such as magnetic base quick-change design). Typical applications include four-link flip clamps in body-in-white welding lines, which can work stably in a spark-splash environment at 1200℃ and have a lifespan of over 500,000 cycles.

[0003] The prior art patent application number is 202020601359.5, and the patent name is: pneumatic clamping device for robotic arm. It includes a robotic arm base frame and a cylinder. The upper and lower sides of one side of the robotic arm base frame are fixedly installed with disassembly and welding plates. The other side of the disassembly and welding plates is snapped with a base snap-fit ​​block. The bottom of the base snap-fit ​​block is fixedly fitted with a telescopic rod. The upper and lower sides of the cylinder are fixedly fitted with anti-leakage plates. The other side of the cylinder is fixedly installed with a connecting plate. The utility model, by incorporating a pneumatic clamping device, addresses the limitation of existing robotic arms, which are only suitable for workpieces with a specific shape and cannot clamp workpieces of different shapes. The pneumatic clamping device adjusts the clamping mechanism based on the workpiece's shape and material, thus avoiding the problem of unsuitability and solving the issue of clamping workpieces of varying shapes. This ensures the robotic arm's applicability to clamp workpieces of different shapes. However, its mechanical clamping mechanism is relatively simple, employing a direct-drive design with dual grippers. The lack of mechanical limiting and guiding mechanisms during movement leads to swaying of moving parts, potentially causing jamming and affecting the mechanism's repeatability. Its clamping function relies solely on friction plates on the gripper surfaces, which, while adaptable to some planar workpieces, cannot securely fix irregularly shaped or cylindrical workpieces. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double elbow clamping mechanism, including a driving cylinder, a positioning frame fixedly connected to the top of the driving cylinder, two first limiting grooves opened on the outer side of the positioning frame, two clamping plates rotatably connected to the inner side of the positioning frame, a docking seat fixedly connected to one side of the clamping plate, and a first phase magnet fixedly connected to the bottom of the inner cavity of the docking seat. Through the limiting mechanism, the movement process of the clamping mechanism can be limited and guided to prevent the clamping mechanism from shaking, which would cause the moving parts to swing, thereby improving the repeatability of the mechanism. Through the clamping mechanism, when it is necessary to clamp irregularly shaped or cylindrical workpieces, the V-shaped clamping plate can be quickly installed, so that the device can clamp irregularly shaped or cylindrical workpieces, thus improving the applicability of the device.

[0006] Preferably, two second limiting grooves are provided on the outer side of the positioning frame, and a limiting slider is fixedly connected to the top of the driving cylinder. The outer side of the limiting slider is in contact with the first limiting groove, and the limiting slider is limited by the first limiting groove.

[0007] Preferably, a first connecting seat is fixedly connected to both sides of the limiting slider, and the outer side of the first connecting seat contacts the second limiting groove, thereby limiting the first connecting seat through the second limiting groove.

[0008] Preferably, a connecting rod is rotatably connected to the inner side of the first connecting seat, and a second connecting seat is movably connected to one end of the connecting rod. The second connecting seat is rotatably connected to the clamping plate, and the clamping plate is connected through the second connecting seat.

[0009] Preferably, the inner side of the docking seat is provided with an annular limiting groove, and the top of the docking seat is provided with a through groove, so as to limit the locking rod through the annular limiting groove.

[0010] Preferably, a V-shaped clamping plate is inserted into the top of the clamping plate, and a mounting base is fixedly connected to one side of the V-shaped clamping plate, so that the irregular workpiece can be clamped and fixed by the V-shaped clamping plate.

[0011] Preferably, a rotating rod is movably connected to the inner side of the mounting base, the bottom end of the rotating rod extends into the inner cavity of the docking seat, and a second phase magnet is fixedly connected to the bottom end of the rotating rod. The second phase magnet is attracted to and connected to the first phase magnet. Two locking rods are fixedly connected to the outer side of the rotating rod. The locking rods are located inside the annular limiting groove, and the rotating rod is fixed by locking the locking rods with the annular limiting groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This double elbow clamping mechanism, through a limiting mechanism, can limit and guide the movement of the clamping mechanism, preventing the clamping mechanism from shaking and causing the moving parts to swing, thereby improving the repeatability of the mechanism.

[0014] 2. This double elbow clamping mechanism, through the clamping mechanism, allows for the quick installation of the V-shaped clamping plate when it is necessary to clamp irregularly shaped or cylindrical workpieces, thereby enabling the device to clamp irregularly shaped or cylindrical workpieces and improving the applicability of the device. Attached Figure Description

[0015] Figure 1 This is a front-view three-dimensional structural diagram of a double elbow clamping mechanism proposed in this utility model;

[0016] Figure 2 This is a three-dimensional cross-sectional view of the limiting mechanism of the double elbow clamping mechanism proposed in this utility model.

[0017] Figure 3 This is a cross-sectional view of the clamping mechanism of the double elbow clamping mechanism proposed in this utility model.

[0018] Figure 4 This is a schematic cross-sectional view of the clamping mechanism of the double elbow clamping mechanism proposed in this utility model after separation.

[0019] In the diagram: 100, drive cylinder; 110, positioning frame; 120, first limiting groove; 130, second limiting groove; 140, limiting slider; 150, first connecting seat; 151, connecting rod; 160, second connecting seat; 200, clamping plate; 210, docking seat; 211, first phase magnet; 220, annular limiting groove; 230, through groove; 240, V-shaped clamping plate; 250, mounting seat; 260, rotating rod; 261, second phase magnet; 270, locking rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1: Please refer to again Figure 1-4 This utility model provides a double elbow clamping mechanism, including a drive cylinder 100. A positioning frame 110 is fixedly connected to the top of the drive cylinder 100. Two first limiting grooves 120 and two second limiting grooves 130 are opened on the outer side of the positioning frame 110. A limiting slider 140 is fixedly connected to the top of the drive cylinder 100. The outer side of the limiting slider 140 is in contact with the first limiting grooves 120. A first connecting seat 150 is fixedly connected to both sides of the limiting slider 140. The outer side of the first connecting seat 150 is in contact with the second limiting grooves 130. A connecting rod 151 is rotatably connected to the inner side of the first connecting seat 150. A second connecting seat 160 is movably connected to one end of the connecting rod 151. The second connecting seat 160 is rotatably connected to the clamping plate 200.

[0022] Specifically, when the drive cylinder 100 extends, the limiting slider 140 installed at the top of the drive cylinder 100 cooperates with the first limiting groove 120 to limit the limiting slider 140. At the same time, the first connecting seats 150 installed on both sides of the limiting slider 140 contact the second limiting groove 130, so that the second limiting groove 130 limits the second connecting seat 160 during the movement of the connecting seat, thereby improving the stability of the clamping mechanism during the movement process.

[0023] Example 2: Please refer to again Figure 1-4 The positioning frame 110 has two clamping plates 200 rotatably connected to its inner side. A docking seat 210 is fixedly connected to one side of the clamping plate 200. A first phase magnet 211 is fixedly connected to the bottom of the inner cavity of the docking seat 210. An annular limiting groove 220 is opened on the inner side of the docking seat 210. A through groove 230 is opened on the top of the docking seat 210. A V-shaped clamping plate 240 is inserted into the top of the clamping plate 200. A mounting seat 250 is fixedly connected to one side of the V-shaped clamping plate 240. A rotating rod 260 is movably connected to the inner side of the mounting seat 250. The bottom end of the rotating rod 260 extends into the inner cavity of the docking seat 210. A second phase magnet 261 is fixedly connected to the bottom end of the rotating rod 260. The second phase magnet 261 is attracted to the first phase magnet 211. Two locking rods 270 are fixedly connected to the outer side of the rotating rod 260. The locking rods 270 are located inside the annular limiting groove 220.

[0024] Specifically, when it is necessary to clamp irregularly shaped or cylindrical workpieces, the V-shaped clamping plate 240 is installed onto the clamping plate 200. After the V-shaped clamping plate 240 is installed and positioned, the bottom end of the rotating rod 260, which is mounted on the mounting base 250 on one side of the V-shaped clamping plate 240, extends through the through groove 230 into the mating seat 210. Then, the second adsorption magnet at the bottom end of the rotating rod 260 is adsorbed and connected with the first adsorption magnet in the mating seat 210. Afterward, rotating the rotating rod 260 causes the two locking levers 270 on the outside of the rotating rod 260 to move out of the two locking levers 270. The lower part of the through groove 230 moves into the annular limiting groove 220, so that the locking rod 270 cooperates with the annular limiting groove 220 to limit the rotating rod 260, preventing the rotating rod 260 from moving upward and fixing the V-shaped clamping plate 240. When it is not necessary to clamp irregular or cylindrical workpieces, the two locking rods 270 on the rotating rod 260 are moved from the annular limiting groove 220 to the lower part of the through groove 230 by rotating the rotating rod 260. Then, the V-shaped clamping plate 240 can be disassembled by simply pulling it up.

[0025] Working principle: When the drive cylinder 100 extends, the limiting slider 140 installed at the top of the drive cylinder 100 cooperates with the first limiting groove 120 to limit the limiting slider 140. At the same time, the first connecting seats 150 installed on both sides of the limiting slider 140 contact the second limiting groove 130, so that the second limiting groove 130 limits the second connecting seat 160 during the movement of the connecting seat, thereby improving the stability of the clamping mechanism during the movement process.

[0026] When clamping irregularly shaped or cylindrical workpieces, the V-shaped clamping plate 240 is installed onto the clamping plate 200. After the V-shaped clamping plate 240 is positioned, the bottom end of the rotating rod 260, mounted on the mounting base 250 on one side of the V-shaped clamping plate 240, extends through the through groove 230 into the mating seat 210. Subsequently, the second adsorption magnet at the bottom end of the rotating rod 260 is adsorbed and connected with the first adsorption magnet in the mating seat 210. Then, rotating the rotating rod 260 causes the two locking rods 270 on the outside of the rotating rod 260 to exit through the through groove. The lower part of 230 moves into the annular limiting groove 220, so that the locking rod 270 cooperates with the annular limiting groove 220 to limit the rotating rod 260, so that the rotating rod 260 cannot move upward and fixes the V-shaped clamping plate 240. When it is not necessary to clamp irregular or cylindrical workpieces, the two locking rods 270 on the rotating rod 260 are moved from the annular limiting groove 220 to the lower part of the through groove 230 by rotating the rotating rod 260. Then, the V-shaped clamping plate 240 can be disassembled by directly pulling up the V-shaped clamping plate 240.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double knuckle clamp mechanism comprising a drive cylinder (100), characterized in that, The top of the drive cylinder (100) is fixedly connected to a positioning frame (110), and two first limiting grooves (120) are opened on the outer side of the positioning frame (110). The positioning frame (110) has two clamping plates (200) rotatably connected to its inner side. A docking seat (210) is fixedly connected to one side of the clamping plate (200). A first phase magnet (211) is fixedly connected to the bottom of the inner cavity of the docking seat (210).

2. A double-toggle clamping mechanism as claimed in claim 1, characterized in that The positioning frame (110) has two second limiting grooves (130) on its outer side. The top of the driving cylinder (100) is fixedly connected to a limiting slider (140), and the outer side of the limiting slider (140) is in contact with the first limiting groove (120).

3. The double elbow clamping mechanism as described in claim 2, characterized in that, Both sides of the limiting slider (140) are fixedly connected to the first connecting seat (150), and the outer side of the first connecting seat (150) is in contact with the second limiting groove (130).

4. The double elbow clamping mechanism as described in claim 3, characterized in that, A connecting rod (151) is rotatably connected to the inner side of the first connecting seat (150), and a second connecting seat (160) is movably connected to one end of the connecting rod (151). The second connecting seat (160) is rotatably connected to the clamping plate (200).

5. The double elbow clamping mechanism as described in claim 1, characterized in that, The inner side of the docking seat (210) is provided with an annular limiting groove (220), and the top of the docking seat (210) is provided with a through groove (230).

6. The double elbow clamping mechanism as described in claim 5, characterized in that, A V-shaped clamping plate (240) is inserted into the top of the clamping plate (200), and a mounting base (250) is fixedly connected to one side of the V-shaped clamping plate (240).

7. The double elbow clamping mechanism as described in claim 6, characterized in that, A rotating rod (260) is movably connected to the inner side of the mounting base (250). The bottom end of the rotating rod (260) extends into the inner cavity of the docking base (210), and a second phase magnet (261) is fixedly connected to the bottom end of the rotating rod (260). The second phase magnet (261) is attracted to the first phase magnet (211). Two locking rods (270) are fixedly connected to the outer side of the rotating rod (260). The locking rods (270) are located inside the annular limiting groove (220).

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