An inner braced flexible jaw

Abstract

The utility model discloses a kind of inner support type flexible clamping jaw, including mounting plate, the side fixed connection of mounting plate has connecting column, the end fixed connection of connecting column away from mounting plate has fixed plate, the fixed plate fixedly connected with connecting plate, every the first fixed block end away from power lever is connected with U-shaped connecting block, every the U-shaped connecting block end away from power lever is fixedly connected with first flexible clamping jaw, the fixed plate and connecting plate are equipped with three spacing limit mechanisms that present together. The utility model adopts the mode of primary clamping and secondary clamping combination, forms multiple fixed to tubular workpiece, further improves clamping effect;By setting multiple groups of collaborative work clamping structure, can apply clamping force from the different position of tubular workpiece, realize multidirectional, multi-angle stable support, effectively avoid workpiece inclination or deviation, reduce workpiece drop risk.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to an internally supported flexible gripper. Background Technology

[0002] In the large-scale sand casting production process, newly made sand molds require the installation of specific pouring gates before use. These gates are cylindrical on the outside and conical on the inside to facilitate pouring. The clamping and positioning of these tubular workpieces is a critical process that directly affects production efficiency and machining accuracy. When installing the pouring gate, it must be fully inserted into the sand mold, thus preventing the gripping of the outer cylinder. The pouring gate material is a bond of sand and resin, and is often thin and long (approximately 150mm in diameter and 700mm in length). For the assembly of these workpieces, the industry currently widely uses external clamping or internal support gripper structures. However, internal support grippers can only open parts with a circular interior, thus failing to provide stable support from within the workpiece, and the force applied cannot be controlled, potentially leading to damage to the pouring gate or inaccurate positioning.

[0003] Existing internal support grippers mostly apply force at a single clamping point or in a single clamping direction, which can only provide support for a specific position of a tubular workpiece. When the workpiece is long or has slight deformation, uneven force can easily cause the workpiece to tilt or shift, which may lead to the risk of the workpiece falling off and affect production safety. To solve the above problems, this application proposes an internal support flexible gripper. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an internally supported flexible gripper. This device combines primary and secondary clamping to provide multiple fixations for tubular workpieces, further enhancing the clamping effect. By setting up multiple sets of cooperating clamping structures, clamping forces can be applied from different positions on the tubular workpiece, achieving stable support from multiple directions and angles, effectively preventing workpiece tilting or displacement, and reducing the risk of workpiece falling off.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An internally supported flexible gripper includes a mounting plate. A connecting column is fixedly connected to one side of the mounting plate. A fixing plate is fixedly connected to the end of the connecting column away from the mounting plate. A connecting plate is fixedly connected to the fixing plate. A hydraulic cylinder is fixedly connected to the end of the mounting plate away from the connecting column. A power rod is fixedly connected to the output end of the hydraulic cylinder. The power rod passes through the mounting plate and the connecting column and is slidably connected to them. Three first fixing blocks are fixedly connected to the outer wall of the power rod. A U-shaped connecting block is connected to the end of each first fixing block away from the power rod. Each U-shaped connecting block is rotatably connected to the fixing plate. A first flexible gripper is fixedly connected to the end of each U-shaped connecting block away from the power rod. Three limiting mechanisms distributed at equal intervals are provided on the fixing plate and the connecting plate.

[0006] Preferably, the limiting mechanism includes a cylinder fixedly connected to the outer wall of the fixed plate, a moving block fixedly connected to the output end of the cylinder, a right-angle block connected to the moving block, a limiting block fixedly connected to the outer wall of the connecting plate, the limiting block and the right-angle block being rotatably connected, a sliding block connected to the end of the right-angle block away from the moving block, the sliding block passing through the limiting block and being slidably connected to it, and a second flexible gripper fixedly connected to the end of the sliding block away from the connecting plate.

[0007] Preferably, the mounting plate has a through opening, the connecting column is hollow, the through opening and the connecting column are connected, the power rod passes through the through opening and extends into the connecting column, the outer wall of the connecting column has three sliding openings, and the three first fixing blocks pass through the corresponding sliding openings and are slidably connected to their inner walls.

[0008] Preferably, the U-shaped connecting block has two arc-shaped holes, and the outer wall of the end of the power rod is fixedly connected to two positioning pins, with the two positioning pins respectively passing through the corresponding arc-shaped holes.

[0009] Preferably, the outer wall of the fixing plate is fixedly connected with a plurality of L-shaped reinforcing plates, and the plurality of L-shaped reinforcing plates are all fixedly connected to the outer wall of the connecting plate. The connecting plate is arranged in a ring shape, and the U-shaped connecting block and the first flexible gripper are integrally formed. The first flexible gripper is arranged through the inner ring of the connecting plate.

[0010] Preferably, the outer surfaces of the three first flexible grippers are provided with protruding structures, and the outer surfaces of the three second flexible grippers are provided with smooth arc surfaces.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. By setting up multiple sets of clamping structures that work together, clamping force can be applied from different positions of the tubular workpiece to achieve stable support in multiple directions and angles, effectively preventing the workpiece from tilting or shifting and reducing the risk of the workpiece falling off.

[0012] 2. The flexible gripper design can adapt to tubular workpieces with different diameters and wall thicknesses. It can avoid scratches, dents and other damage to the inner wall of the workpiece caused by rigid contact through reasonable structural design, and can provide sufficient clamping force to ensure positioning effect, thus balancing adaptability and reliability.

[0013] 3. Each clamping component has precise linkage control, which can realize synchronous expansion and ensure that the workpiece is subjected to balanced force; the combination of primary clamping and secondary clamping forms multiple fixation for tubular workpieces, further improving the clamping effect and ensuring that the workpiece remains stable during processing.

[0014] In summary, this device employs a combination of primary and secondary clamping to provide multiple layers of fixation for the tubular workpiece, thereby enhancing the clamping effect. By setting up multiple sets of cooperating clamping structures, clamping forces can be applied from different positions on the tubular workpiece, achieving stable support from multiple directions and angles, effectively preventing workpiece tilting or displacement, and reducing the risk of workpiece falling off. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an internally supported flexible gripper proposed in this utility model; Figure 2 This is a schematic diagram of the first structure of an internally supported flexible gripper with the mounting plate removed, as proposed in this utility model. Figure 3 This is a schematic diagram of the second structure of an internally supported flexible gripper with the mounting plate removed, as proposed in this utility model. Figure 4 This is a schematic diagram of the second structure of an internally supported flexible gripper with the mounting plate removed, as proposed in this utility model.

[0016] In the diagram: 1 Mounting plate, 2 Connecting column, 3 Fixing plate, 4 Connecting plate, 5 Hydraulic cylinder, 6 Power rod, 7 First fixing block, 8 U-shaped connecting block, 9 First flexible gripper, 10 Cylinder, 11 Moving block, 12 Limiting block, 13 Right angle block, 14 Sliding block, 15 Second flexible gripper. Detailed Implementation

[0017] 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.

[0018] Reference Figures 1-4An internally supported flexible gripper includes a mounting plate 1, which provides basic mounting support for the entire gripper and is used to fix and connect various components. A connecting column 2 is fixedly connected to one side of the mounting plate 1, which serves to connect the mounting plate 1 and a fixed plate 3. A fixed plate 3 is fixedly connected to the end of the connecting column 2 away from the mounting plate 1. The fixed plate 3 is used to install and support a U-shaped connecting block 8 and a cylinder 10. A connecting plate 4 is fixedly connected to the fixed plate 3. Multiple L-shaped reinforcing plates are fixedly connected to the outer wall of the fixed plate 3. The multiple L-shaped reinforcing plates are all fixedly connected to the outer wall of the connecting plate 4. The connecting plate 4 and the fixed plate 3 cooperate to provide an installation and positioning foundation for the first flexible gripper 9 and the limiting mechanism.

[0019] A hydraulic cylinder 5 is fixedly connected to the end of the mounting plate 1 away from the connecting column 2. The hydraulic cylinder 5 serves as the main driving component, providing driving force for the movement of the power rod 6. The output end of the hydraulic cylinder 5 is fixedly connected to the power rod 6, which transmits the driving force of the hydraulic cylinder 5 to the first fixed block 7, driving the subsequent components to move together. The power rod 6 passes through the mounting plate 1 and the connecting column 2 and is slidably connected to them. The mounting plate 1 has a through opening, which provides a through channel for the power rod 6 to ensure its smooth axial movement. The connecting column 2 is hollow, and the hollow structure provides internal space for the movement of the power rod 6 and the first fixed block 7. The through opening is connected to the connecting column 2, and the power rod 6 passes through the through opening and extends into the connecting column 2. Three first fixed blocks 7 are fixedly connected to the outer wall of the power rod 6. The first fixed blocks 7 transmit the movement of the power rod 6 to the U-shaped connecting block 8 to realize the transmission of force. The outer wall of the connecting column 2 has three sliding openings, which restrict the movement trajectory of the first fixed blocks 7 to ensure that they slide in a preset direction. The three first fixed blocks 7 pass through the corresponding sliding openings and are slidably connected to their inner walls. Each first fixed block 7 is away from the power rod 6. Each end of the rod 6 is connected to a U-shaped connecting block 8. The U-shaped connecting block 8 acts as an intermediate connector, converting the linear motion of the first fixed block 7 into its own rotational motion. Two arc-shaped holes are formed through the U-shaped connecting block 8. Two positioning pins are fixedly connected to the outer wall of the end of the power rod 6. The two positioning pins pass through corresponding arc-shaped holes, and the arc-shaped holes cooperate with the positioning pins to limit the rotation range of the U-shaped connecting block 8, ensuring motion stability. Each U-shaped connecting block 8 is rotatably connected to the fixed plate 3. The U-shaped connecting block 8 rotates around the connection point of the fixed plate 3, driving the first fixed block 7... A flexible gripper 9 enables the opening and closing action. Each U-shaped connecting block 8 has a first flexible gripper 9 fixedly connected to the end away from the power rod 6. The first flexible gripper 9 directly contacts the inner wall of the tubular workpiece to achieve initial clamping of the workpiece. The outer surfaces of the three first flexible grippers 9 are provided with protruding structures. The connecting plate 4 is arranged in a ring shape. The U-shaped connecting block 8 and the first flexible gripper 9 are integrally formed. The first flexible gripper 9 is set through the inner ring of the connecting plate 4. The integrally formed structure improves the connection strength between the U-shaped connecting block 8 and the first flexible gripper 9 and ensures the reliability of transmission.

[0020] Three equally spaced limiting mechanisms are provided on the fixed plate 3 and the connecting plate 4. These limiting mechanisms cooperate with the first flexible gripper 9 to achieve secondary clamping of the tubular workpiece, improving positioning accuracy. Each limiting mechanism includes a cylinder 10 fixedly connected to the outer wall of the fixed plate 3. The cylinder 10 provides driving force to the limiting mechanism, causing the moving block 11 to move. The output end of the cylinder 10 is fixedly connected to the moving block 11, which is connected to a right-angle block 13. The moving block 11 transmits the driving force of the cylinder 10 to the right-angle block 13, driving it to rotate. A limiting block 12 is fixedly connected to the outer wall of the connecting plate 4. The limiting block 12 provides a rotation fulcrum for the right-angle block 13 and restricts the movement direction of the sliding block 14. The limiting block 12 is rotatably connected to the right-angle block 13, and the end of the right-angle block 13 furthest from the moving block 11 is connected to… A sliding block 14 is connected to the right-angle block 13. The sliding block 14 slides along the limiting block 12 under the drive of the right-angle block 13, pushing the second flexible gripper 15 to move. The sliding block 14 passes through the limiting block 12 and is slidably connected to it. The two ends of the right-angle block 13 are respectively provided with a first sliding port and a second sliding port. The ends of the moving block 11 and the sliding block 14 are both equipped with connecting side posts. The two connecting side posts pass through the sliding ports to ensure the normal rotation of the right-angle block 13. The end of the sliding block 14 away from the connecting plate 4 is fixedly connected to the second flexible gripper 15. The second flexible gripper 15 contacts the inner wall of one end of the workpiece and cooperates with the first flexible gripper 9 to complete the secondary clamping. The outer surfaces of the three second flexible grippers 15 are all provided with smooth arc surfaces. The smooth arc surfaces can avoid damage to the inner wall of the workpiece during clamping and at the same time ensure the stability of the contact.

[0021] In this invention, when clamping and positioning a tubular workpiece is required, the tubular workpiece is fitted onto the outer wall of the three first flexible grippers 9, with one end of the tubular workpiece abutting against the outer wall of the fixing plate 3. The hydraulic cylinder 5 is activated, and its output end drives the power rod 6 to move (the positioning pin at the end of the power rod 6 moves within the arc hole of the U-shaped connecting block 8). This, in turn, causes the three U-shaped connecting blocks 8 and the first flexible grippers 9 to rotate around the connection point between the U-shaped connecting blocks 8 and the fixing plate 3, thus opening the three first flexible grippers 9 to clamp the inner wall of the tubular workpiece. Simultaneously, multiple pneumatic cylinders are activated. Cylinder 10 drives the moving block 11 to move through the output end of cylinder 10, causing the right-angle block 13 to rotate around the connection point of the right-angle block 13 and the limiting block 12 as the center (during this process, the connecting side post at the end of the moving block 11 moves in the first sliding port on the right-angle block 13, and the connecting side post at the end of the sliding block 14 moves in the second sliding port on the right-angle block 13), causing multiple sliding blocks 14 and the second flexible gripper 15 to move away from each other from the center until multiple second flexible grippers 15 abut against the inner wall of one end of the tubular workpiece, completing the secondary clamping of the tubular workpiece, and the clamping effect of the tubular workpiece is good.

Claims

1. An internally supported flexible gripper, comprising a mounting plate (1), characterized in that, A connecting column (2) is fixedly connected to one side of the mounting plate (1). A fixing plate (3) is fixedly connected to the end of the connecting column (2) away from the mounting plate (1). A connecting plate (4) is fixedly connected to the fixing plate (3). A hydraulic cylinder (5) is fixedly connected to the end of the mounting plate (1) away from the connecting column (2). A power rod (6) is fixedly connected to the output end of the hydraulic cylinder (5). The power rod (6) passes through the mounting plate (1) and the connecting column (2) and is slidably connected to them. Three first fixing blocks (7) are fixedly connected to the outer wall of the power rod (6). A U-shaped connecting block (8) is connected to the end of each first fixing block (7) away from the power rod (6). Each U-shaped connecting block (8) is rotatably connected to the fixing plate (3). A first flexible gripper (9) is fixedly connected to the end of each U-shaped connecting block (8) away from the power rod (6). Three limiting mechanisms with equal spacing are provided on the fixing plate (3) and the connecting plate (4).

2. The internally supported flexible gripper according to claim 1, characterized in that, The limiting mechanism includes a cylinder (10) fixedly connected to the outer wall of the fixed plate (3). A moving block (11) is fixedly connected to the output end of the cylinder (10). A right-angle block (13) is connected to the moving block (11). A limiting block (12) is fixedly connected to the outer wall of the connecting plate (4). The limiting block (12) is rotatably connected to the right-angle block (13). A sliding block (14) is connected to the end of the right-angle block (13) away from the moving block (11). The sliding block (14) passes through the limiting block (12) and is slidably connected to it. A second flexible gripper (15) is fixedly connected to the end of the sliding block (14) away from the connecting plate (4).

3. The internally supported flexible gripper according to claim 1, characterized in that, The mounting plate (1) has a through opening, the connecting column (2) is hollow, the through opening is connected to the connecting column (2), the power rod (6) passes through the through opening and extends into the connecting column (2), the outer wall of the connecting column (2) has three sliding openings, and the three first fixing blocks (7) pass through the corresponding sliding openings and are slidably connected to their inner walls.

4. The internally supported flexible gripper according to claim 1, characterized in that, Two arc holes are formed through the U-shaped connecting block (8), and two positioning pins are fixedly connected to the outer wall of the end of the power rod (6). The two positioning pins are respectively set through the corresponding arc holes.

5. The internally supported flexible gripper according to claim 1, characterized in that, The outer wall of the fixing plate (3) is fixedly connected with multiple L-shaped reinforcing plates. All of the L-shaped reinforcing plates are fixedly connected to the outer wall of the connecting plate (4). The connecting plate (4) is arranged in a ring. The U-shaped connecting block (8) and the first flexible gripper (9) are integrally formed. The first flexible gripper (9) passes through the inner ring of the connecting plate (4).

6. The internally supported flexible gripper according to claim 2, characterized in that, The outer surfaces of the three first flexible grippers (9) are provided with protruding structures, and the outer surfaces of the three second flexible grippers (15) are provided with smooth arc surfaces.

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