A tubular workpiece clamping device

Abstract

The utility model discloses a kind of tubular workpiece clamping devices, including fixed seat and the clamping assembly of setting at its bottom surface, clamping assembly includes drive assembly, several groups of guide sliding components and several clamping jaws, several groups of guide sliding components are evenly laid out with drive assembly as center, each guide sliding component includes guide sliding track and the assembly plate of sliding setting on it, clamping jaw is fixed on assembly plate, drive assembly is used to drive all clamping jaws to be synchronously radial motion under the constraint of guide sliding component, to realize the clamping and loosening of workpiece, drive assembly includes cylinder, telescopic shaft, push-pull shaft, three-prong block and articulated connecting rod, guide sliding component further includes rail mounting plate, sliding block and side plate installed on fixed seat by positioning groove, quick positioning and screw fastening are achieved between each component through assembly groove structure, the utility model is compact in structure, rigid, clamping is stable and modular degree is high, convenient for assembly and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of gripper technology, specifically a tubular workpiece clamping device. Background Technology

[0002] In fields such as machining, automated assembly, and logistics handling, it is often necessary to grip, fix, and move cylindrical workpieces such as round tubes and shafts. There are many types of existing clamping devices, among which the three-jaw chuck is a common one. However, traditional three-jaw chucks are usually complex in structure, large in size and weight, and have high manufacturing costs. They are mostly used for rotary clamping of fixed equipment such as machine tools, and are difficult to integrate directly into automated production lines or robotic arms as actuators. In addition, some gripper mechanisms designed for automated equipment may have problems such as misalignment, uneven clamping force, loose structure with insufficient rigidity, or inconvenient disassembly and assembly. Therefore, there is an urgent need for a dedicated tubular workpiece clamping device that is compact in structure, has good rigidity, stable clamping, and is easy to assemble and maintain quickly. Utility Model Content

[0003] The purpose of this invention is to provide a tubular workpiece clamping device that solves the problems of existing clamping devices being prone to eccentricity, loose structure, inconvenient disassembly and assembly, and difficulty in integration into automated equipment when clamping round tubes and rods. By linking the circumferentially distributed guide sliding components with the central drive component, the synchronous, stable, and precise opening and closing of multiple grippers is achieved. Its modular assembly structure has the advantages of high rigidity and rapid assembly and maintenance, and is particularly suitable for reliable clamping of tubular workpieces in automated production lines.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tubular workpiece clamping device, comprising a fixed base, characterized in that... A clamping assembly is disposed on the fixed base. The clamping assembly includes a driving assembly, several sets of guide sliding assemblies, and several grippers. The number of guide sliding assemblies is the same as the number of grippers. The plurality of guide slide components are evenly arranged in a circle around the drive component on the bottom surface of the fixed base. Each guide slide component includes a guide slide rail and an assembly plate slidably disposed on the guide slide rail. The gripper is fixed to the assembly plate. The driving component is used to drive several of the grippers to simultaneously clamp the workpiece under the constraint of the corresponding guide components.

[0005] In a further technical solution, the drive assembly includes a cylinder, a telescopic shaft, a push-pull shaft, a three-pronged block, and a connecting rod. The cylinder is fixed to the top surface of the fixed base. The telescopic shaft is poweredly connected to the cylinder and passes through the fixed base. The push-pull shaft is fixed to one end of the telescopic shaft. The push-pull shaft is fixedly connected to the three-pronged block. The three-pronged block is hinged to the connecting rod. The connecting rod is hinged to the gripper.

[0006] In a further technical solution, each guide rail assembly also includes a guide rail mounting plate and a sliding block. The guide rail mounting plate is fixed to the bottom surface of the fixed base, the guide rail is fixed to the guide rail mounting plate, and the sliding block is slidably disposed on the guide rail. Each group of guide rail assemblies is provided with two guide rails, each guide rail is provided with one sliding block, a side plate is fixed on the sliding block, and the assembly plate is fixed between the two side plates.

[0007] A further technical solution is that the bottom surface of the fixed base is provided with several positioning grooves, and the top surface is provided with positioning mounting holes. The guide rail mounting plate is fixed in the positioning grooves by inserting screws into the positioning mounting holes.

[0008] In a further technical solution, the guide rail mounting plate is provided with first assembly grooves on both sides, and the guide rail is fixedly installed in the first assembly grooves.

[0009] In a further technical solution, a second assembly groove is provided on the side plate, and the assembly plate is inserted into the second assembly groove and fixed to the side plate.

[0010] In a further technical solution, a third assembly groove is provided at the bottom of the assembly plate, and the clamping claw is inserted into the third assembly groove and fixed to the assembly plate.

[0011] In a further technical solution, a clamping block is fixed on the gripper, and the clamping block is provided with anti-slip texture.

[0012] In a further technical solution, the three-pronged block is Y-shaped and has three prongs. Two connecting rods are hinged to each prong. The two connecting rods are hinged to one prong of the three-pronged block, and the other ends of the two connecting rods are on a gripper.

[0013] A further technical solution also includes a connecting plate fixed to the fixing base; and a fixing plate fixed to the connecting plate.

[0014] In summary, the tubular workpiece clamping device provided by this utility model, through the combination of multiple circumferentially arranged guide sliding components and a central drive component, achieves synchronous, stable, and precise radial opening and closing movements of multiple grippers, making it particularly suitable for clamping round tubes and rods. Its beneficial effects are mainly reflected in the following aspects: Stable and reliable clamping: Multiple grippers move synchronously around the drive assembly, which can apply clamping force to the workpiece evenly, effectively preventing the workpiece from tilting or falling off, and the clamping force is large and stable.

[0015] Compact structure and high rigidity: The guide rail, guide rail mounting plate, sliding block, side plate and assembly plate are firmly connected by assembly groove and screws to form a stable rigid motion pair, which ensures that the gripper will not shake or deform when bearing load. The overall structure is compact and occupies little space.

[0016] Modular design and easy assembly: All major components, such as the guide rail (through the first assembly slot), the assembly plate (through the second assembly slot), and the gripper (through the third assembly slot), are connected by assembly slots and screws, realizing modular design and quick disassembly and assembly, which greatly facilitates manufacturing, assembly and maintenance.

[0017] Precise positioning: The positioning groove on the bottom surface of the fixed seat cooperates with the guide rail mounting plate to ensure that all guide sliding components can be precisely distributed in a circle with the drive shaft as the center, thereby ensuring the accuracy of the clamping center.

[0018] Good adaptability: By changing the grippers or clamping blocks of different shapes or sizes, it can adapt to the clamping needs of tubular or rod-shaped workpieces of different diameters and types, making it flexible in application. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a first three-dimensional structural schematic diagram of the present invention; Figure 2 This is a second three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the third three-dimensional structure of this utility model; Figure 4 This is a schematic diagram of the fourth three-dimensional structure of this utility model; In the diagram: 10. Fixed base; 11. Positioning mounting hole; 12. Connecting plate; 13. Fixed plate; 14. Cylinder; 15. Guide rail mounting plate; 16. Guide rail; 17. Sliding block; 18. Side plate; 19. Assembly plate; 20. Gripper; 21. Clamping block; 22. Tripod block; 23. Connecting rod; 24. Push-pull shaft; 25. Telescopic shaft; 26. Positioning groove; 27. First assembly groove; 28. Second assembly groove; 29. ​​Third assembly groove. Detailed Implementation

[0020] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0022] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] like Figures 1-4As shown, the system includes a fixed base 10, on which a connecting plate 12 is fixed. The connecting plate 12 can be welded to the fixed base 10. A fixing plate 13 is fixed on the connecting plate 12 for connection and fixing with a CNC machine tool. The connecting plate 12 and the fixing plate 13 can be welded together. A clamping assembly is provided on the fixed base 10. The clamping assembly includes a drive assembly, several sets of guide sliding assemblies, and several grippers 20. The number of guide sliding assemblies is the same as the number of grippers 20. The drive assembly drives several grippers 20 to clamp the workpiece simultaneously under the constraint of the corresponding guide sliding assemblies.

[0026] In one implementation, several guide slide components are evenly arranged in a circular pattern around the drive component on the bottom surface of the fixed base 10. Each guide slide component includes a guide slide rail 16 fixed on the bottom surface of the fixed base 10. An assembly plate 19 is slidably arranged on the guide slide rail 16, and several grippers 20 are respectively fixed to several assembly plates 19.

[0027] Specifically, in this embodiment, three grippers 20 are provided, and the number of guide sliding components is the same as the number of grippers 20, also three. Three evenly distributed circumferential positioning grooves 26 are formed on the bottom surface of the fixed base 10. The guide sliding components also include guide rail mounting plates 15, of which three are provided, all fixed to the three positioning grooves 26. Three sets of positioning mounting holes 11 are provided on the positioning mounting holes 11, corresponding to the three positioning grooves 26. Screws are inserted into the positioning mounting holes 11 and then into the guide rails. Inside the guide rail mounting plate 15, the guide rail mounting plate 15 is fastened to the positioning groove 26. The positioning groove 26 facilitates the insertion and positioning of the guide rail mounting plate 15. Guide rails 16 are fixed on both sides of each guide rail mounting plate 15. The guide rails 16 are tightened to the guide rail mounting plate 15 by screws. Each guide rail 16 has a sliding block 17. To prevent the sliding block 17 from detaching from the guide rail 16, the guide rail 16 can be designed in an "I" shape. The sliding block 17 has a corresponding groove. (See attached diagram.) Figure 1 and attached Figure 2 In order to facilitate the quick assembly of the guide rail 16 onto the guide rail mounting plate 15, first assembly slots 27 can be provided on both sides of the guide rail mounting plate 15. The guide rail 16 is installed on the first assembly slots 27 to achieve quick positioning and assembly, so that the guide rails 16 on both sides of the guide rail mounting plate 15 maintain the same height. The sliding block 17 is slidably mounted on the guide rail 16. Side plates 18 are fixed on the two sides of the two sliding blocks 17 in the same group of guide rail components that are far apart from each other. The assembly plate 19 is fixed between the two side plates 18. Mounting holes are provided on both the sliding block 17 and the side plates 18 for inserting bolts for quick positioning and splicing. Second assembly grooves 28 are provided on the sides of the two side plates 18 that are close to each other. The assembly plate 19 is quickly positioned and assembled by inserting into the second assembly grooves 28, and the assembly plate 19 is fixed between the two side plates 18 by screwing screws into the side plates 18.

[0028] In one implementation, a third assembly groove 29 is provided at the bottom of the assembly plate 19, and the gripper 20 can be slidably inserted into the third assembly groove 29. Both the assembly plate 19 and the gripper 20 are provided with splicing screw holes. By aligning the splicing screw holes and inserting screws, the gripper 20 and the assembly plate 19 can be quickly positioned and assembled.

[0029] In one embodiment, a clamping block 21 is fixed on one side of the gripper 20 for clamping the workpiece. The clamping block 21 is provided with texture, such as anti-slip texture, to facilitate clamping of the workpiece and prevent the workpiece from falling off. The clamping block 21 can be detachably fixed to the gripper by screws.

[0030] In one embodiment, the drive assembly includes a cylinder 14 fixed to the top surface of the fixed base 10. The cylinder 14 is poweredly connected to a telescopic shaft 25, which passes through the fixed base 10. A push-pull shaft 24 is fixed to one end of the telescopic shaft 25. The push-pull shaft 24 is fixed to the telescopic shaft 25 by threaded tightening. A Y-shaped three-pronged block 22 is fixed to one end of the push-pull shaft 24. A connecting rod 23 is hinged to the three-pronged block 22 and is hinged to the gripper 20.

[0031] Specifically, each branch of the three-pronged block 22 is hinged with two connecting rods 23. These two connecting rods 23 are hinged to the three-pronged block 22 by a pin, and the other end of each connecting rod 23 is also hinged to the gripper 20 by a pin. See the appendix for details. Figure 1 To be continued Figure 4 .

[0032] Its working principle is as follows: The shape of the cylinder 14 and the length of the connecting rod 23 determine the opening and closing size of the gripper 20. The inward or outward movement of the gripper 20 is achieved by the extension and retraction of the guide slide assembly and the drive assembly. For example, the operation of the cylinder 14 drives the extension shaft 25 and the push-pull shaft 24 to move, thereby moving the three-pronged block 22, which in turn drives the three grippers 20 to open and close. For example, when the cylinder 14 performs the return motion, it drives the grippers 20 to move inward, thereby clamping the round tube or round bar-shaped workpiece.

[0033] The main steps in using this tubular workpiece clamping device are as follows: 1. Installation and Preparation: The entire clamping device is fixed to the end effector of the robotic arm or automated equipment by means of the fixing plate 13 and the connecting plate 12.

[0034] The air passage and control system are connected to cylinder 14.

[0035] 2. Clamping the workpiece: The control system issues a command to drive cylinder 14 to perform a return stroke.

[0036] The telescopic shaft 25 of cylinder 14 retracts, driving the push-pull shaft 24 and the three-pronged block 22 to move upward.

[0037] The three-pronged block 22 pulls the three grippers 20 simultaneously and synchronously through the three sets of connecting rods 23.

[0038] Each gripper 20, driven by the assembly plate 19 fixed thereto, slides along the guide rail 16 toward the central axis of the device (radially inward).

[0039] Finally, the clamping blocks 21 on the three grippers 20 simultaneously contact and hold the workpiece (such as a round tube or round bar), completing the clamping operation.

[0040] 3. Release the workpiece: When it is necessary to release the workpiece, the control system drives the cylinder 14 to perform an ejection motion.

[0041] The telescopic shaft 25 of cylinder 14 extends, pushing the push-pull shaft 24 and the three-pronged block 22 downward.

[0042] The three-pronged block 22 pushes the three grippers 20 through the connecting rod 23.

[0043] Driven by the assembly plate 19, the gripper 20 slides along the guide rail 16 in a direction away from the central axis (radially outward), thereby releasing the workpiece.

[0044] Replacement and adjustment: If it is necessary to clamp workpieces of different specifications, the screws can be unscrewed and the jaws 20 can be removed from the third assembly slot 29 of the assembly plate 19 for replacement.

[0045] Similarly, modular components such as the guide rail 16 and assembly plate 19 can be quickly maintained or replaced by removing the screws.

[0046] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0047] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0048] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A tubular workpiece clamping device, comprising a fixed base (10), characterized in that, A clamping assembly is disposed on the fixed base (10). The clamping assembly includes a driving assembly, several sets of guide sliding assemblies and several grippers (20). The number of guide sliding assemblies is the same as the number of grippers (20). Among them, the plurality of guide slide components are evenly arranged in a circle around the drive component on the bottom surface of the fixed seat (10). Each guide slide component includes a guide slide rail (16) and an assembly plate (19) slidably disposed on the guide slide rail (16). The gripper (20) is fixed on the assembly plate (19). The driving component is used to drive several of the grippers (20) to clamp the workpiece synchronously under the constraint of the corresponding guide components.

2. The clamping device according to claim 1, characterized in that, The drive assembly includes a cylinder (14), a telescopic shaft (25), a push-pull shaft (24), a three-pronged block (22), and a connecting rod (23). The cylinder (14) is fixed to the top surface of the fixed seat (10). The telescopic shaft (25) is poweredly connected to the cylinder (14) and passes through the fixed seat (10). The push-pull shaft (24) is fixed to one end of the telescopic shaft (25). The push-pull shaft (24) is fixedly connected to the three-pronged block (22). The three-pronged block (22) is hinged to the connecting rod (23). The connecting rod (23) is hinged to the gripper (20).

3. The clamping device according to claim 1, characterized in that, Each guide slide assembly also includes a guide rail mounting plate (15) and a sliding block (17). The guide rail mounting plate (15) is fixed to the bottom surface of the fixed base (10). The guide slide rail (16) is fixed on the guide rail mounting plate (15). The sliding block (17) is slidably disposed on the guide slide rail (16). Each group of guide slide assemblies is provided with two guide slide rails (16). Each guide slide rail (16) is provided with one sliding block (17). A side plate (18) is fixed on the sliding block (17). The assembly plate (19) is fixed between the two side plates (18).

4. The clamping device according to claim 3, characterized in that, The bottom surface of the fixed base (10) is provided with a plurality of positioning grooves (26), and the top surface of the 10 is provided with positioning mounting holes (11). The guide rail mounting plate (15) is fixed in the positioning grooves (26) by inserting screws into the positioning mounting holes (11).

5. The clamping device according to claim 3, characterized in that, The guide rail mounting plate (15) has a first assembly groove (27) on both sides, and the guide rail (16) is fixedly installed in the first assembly groove (27).

6. The clamping device according to claim 3, characterized in that, The side plate (18) is provided with a second assembly groove (28), and the assembly plate (19) is inserted into the second assembly groove (28) and fixed to the side plate (18).

7. The clamping device according to claim 1, characterized in that, The bottom of the assembly plate (19) is provided with a third assembly groove (29), and the gripper (20) is inserted into the third assembly groove (29) and fixed to the assembly plate (19).

8. The clamping device according to claim 1, characterized in that, A clamping block (21) is fixed on the gripper (20), and the clamping block (21) is provided with anti-slip texture.

9. The clamping device according to claim 2, characterized in that, The three-pronged block (22) is Y-shaped and has three prongs. Two connecting rods (23) are hinged to each prong. The two connecting rods (23) are hinged to one prong of the three-pronged block (22), and the other end of the two connecting rods (23) is on a gripper (20).

10. The clamping device according to claim 1, characterized in that, It also includes a connecting plate (12) fixed to the fixing seat (10); and a fixing plate (13) fixed to the connecting plate (12).

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