Thin-walled part inner expansion tightening tool

Abstract

The utility model relates to mechanical manufacturing technical field discloses a kind of thin-walled part inner expansion tooling, comprising: support frame, for bearing assembly;Base, arrangement is in support frame;Lifting assembly, including the threaded rod one being set on base, still include sleeve threadedly connected on the threaded rod one;Movable assembly, including moving block, and moving block slidingly connected on threaded rod one and rotationally connected on sleeve, still include connecting rod one being hinged on moving block, still include connecting block being hinged on connecting rod one;Clamping assembly, including setting on connecting block expansion block, still include clamping block slidingly connected on expansion block;Expansion assembly, including the anti-skid line being opened in sleeve, L-shaped expansion block increases and the contact area of part inner wall corner, avoid local stress deformation;Rubber material clamping block utilizes elastic surface of part, prevent scratching part, and also enhance friction, further improve clamping stability, guarantee thin-walled part machining precision.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, specifically to an internal tensioning fixture for thin-walled parts. Background Technology

[0002] With multi-component linkage adjustment as its core, this technology involves mechanical manufacturing technology and solves the problems of easy deformation and insufficient stability in the processing of thin-walled parts.

[0003] A search revealed existing technology (application number: CN218080467U), which describes "an internal tensioning fixture for thin-walled parts." This utility model includes a detachably connected pull rod mechanism, a clamping sleeve, and a clamping seat. The clamping sleeve has a second chamfer, and the base of the clamping seat has a first chamfer at the connection with the annular sleeve. Pressure is applied to the second chamfer of the clamping sleeve by the first chamfer of the clamping seat, causing the clamping sleeve to tighten and fix the thin-walled part. This utility model features a unique structure that achieves secure fixing of thin-walled parts through internal tensioning.

[0004] However, while existing technologies are easy to install and disassemble, simple to operate, and widely applicable, ensuring the processing accuracy of thin-walled parts and suitable for small and medium batch production, they still have some shortcomings: existing technologies lack sufficient tension stability for thin-walled parts. This device, by clamping the inner and outer sides of the thin-walled parts and setting rubber clamping blocks to increase friction, can also prevent scratching the parts. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an internal tensioning fixture for thin-walled parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a tensioning fixture for thin-walled parts, comprising: a support frame for supporting components; a base arranged on the support frame; a lifting assembly including a threaded rod disposed on the base, and a sleeve threadedly connected to the threaded rod; a movable assembly including a moving block slidably connected to the threaded rod and rotatably connected to the sleeve, a connecting rod hinged to the moving block, and a connecting block hinged to the connecting rod; a clamping assembly including a tensioning block disposed on the connecting block, and a clamping block slidably connected to the tensioning block; and an expansion assembly including anti-slip grooves formed on the sleeve.

[0007] In this technical solution, it should be noted that the support frame plays a crucial load-bearing role throughout the entire use of the tensioning fixture. It stably supports the base and other components, providing fundamental support for the stable operation of the entire fixture. When the tensioning fixture needs to be operated, the sleeve is rotated, allowing it to move along the threaded rod. During the sleeve's movement, the moving block moves along with it. The moving block further applies a thrust to the connecting block via the connecting rod, causing the connecting block to shift. The connecting block, in turn, drives the tensioning block, ensuring that the tensioning block is precisely aligned with the inner wall of the thin-walled part. The sleeve surface is provided with anti-slip textures, which significantly increase the friction when rotating the sleeve, achieving initial positioning of the fixture and initial contact between the tensioning block and the thin-walled part. This effectively prevents slippage during sleeve rotation, ensuring operational stability and safety.

[0008] As a further description of the above technical solution: The lifting assembly includes a cylinder disposed at one end of a threaded rod.

[0009] In this technical solution, it should be noted that the cylinder is fixed at one end of the threaded rod one, providing a hinge fulcrum for the connecting rod two and connecting rod three of the subsequent moving components, providing a stable hinge foundation for the moving components, and ensuring smooth subsequent movement of the moving components.

[0010] As a further description of the above technical solution: The movable components include: connecting rod two, one end of which is hinged to the bottom end of the cylinder and the other end of which is hinged to the bottom end of the connecting block; connecting rod three, one end of which is hinged to the top end of the cylinder and the other end of which is hinged to the top end of the connecting block.

[0011] In this technical solution, it should be noted that when the moving block moves, connecting rod one pushes the connecting block synchronously. At the same time, connecting rod two and connecting rod three provide auxiliary support and guidance from the bottom and top of the connecting block, respectively, effectively restricting the direction of movement of the connecting block. This makes the movement of the connecting block more stable and minimizes the possibility of the connecting block deviating during movement. This ensures that the tensioning block can be accurately aligned with the inner wall of the thin-walled part, laying a solid foundation for subsequent stable and precise tensioning operations on the thin-walled part.

[0012] As a further description of the above technical solution: The clamping assembly includes: a threaded rod II, which is threadedly connected to the tensioning block and rotatably connected to the clamping block; The groove is formed on the tensioning block and is slidably connected to the clamping block.

[0013] In this technical solution, it should be noted that when the threaded rod 2 is rotated, it moves along the tensioning block, which in turn pushes the clamping block to slide along the groove on the tensioning block. By adjusting the contact force between the clamping block and the outer wall of the thin-walled part, the clamping effect on the thin-walled part can be enhanced, avoiding problems such as loosening or displacement of the thin-walled part. Moreover, it can flexibly adapt to thin-walled parts with different wall thicknesses to meet diverse production and usage needs.

[0014] As a further description of the above technical solution: The extension component includes a hexagonal nut, arranged on the sleeve and threadedly connected to the threaded rod.

[0015] In this technical solution, it should be noted that the hexagonal nut assists in turning, enabling the operator to rotate the sleeve more easily and accurately, thereby achieving the initial positioning of the tooling and the initial contact between the tensioning block and the thin-walled part.

[0016] As a further description of the above technical solution: The tensioning block is L-shaped.

[0017] In this technical solution, it should be noted that the L-shaped tensioning block increases the contact area with the thin-walled part by fitting its transverse and longitudinal surfaces to the corners of the inner wall, thus improving the fit between the tensioning block and the thin-walled part. During the tensioning operation, the uniform distribution of force prevents excessive deformation of the thin-walled part due to excessive local force concentration, thereby ensuring that the thin-walled part maintains its original shape and structural integrity during the tensioning process, providing a stable and reliable guarantee for subsequent processing or use.

[0018] As a further description of the above technical solution: The clamping block is made of rubber.

[0019] In this technical solution, it should be noted that when the rubber clamping block contacts the inner wall of the thin-walled part, the elastic deformation of the rubber is used to conform to the surface of the part, while increasing the friction with the part, avoiding scratching the surface of the thin-walled part by the clamping block, enhancing clamping stability, and preventing the part from sliding during processing.

[0020] As a further description of the above technical solution: The bottom of the support frame is equipped with support legs.

[0021] This utility model has the following beneficial effects: Precise tensioning and stable positioning are achieved through the linkage of multiple components: the rotating sleeve drives the moving block, which, together with connecting rod one, connecting rod two, and connecting rod three, pushes the connecting block and the tensioning block. Combined with the threaded rod two, the pressure of the clamping block is finely adjusted, which can adapt to parts with different wall thicknesses; the hexagonal nut assists in tightening, and the anti-slip texture avoids slippage during operation, ensuring the overall tensioning state is stable and preventing parts from shifting during processing.

[0022] Special structure and materials reduce part damage and improve fit: L-shaped tensioning blocks increase the contact area with the corners of the inner wall of the part, avoiding localized deformation due to stress; rubber clamping blocks use elasticity to fit the surface of the part, which not only prevents scratches on the part, but also enhances friction, further improving clamping stability and ensuring the machining accuracy of thin-walled parts. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the clamping component of this utility model; Figure 3 This is a schematic diagram of the movable components of this utility model; Figure 4 This is a schematic diagram of the lifting component of this utility model.

[0024] Legend: 1. Support frame; 2. Base; 3. Threaded rod one; 4. Cylinder; 5. Sleeve; 6. Moving block; 7. Connecting rod one; 8. Connecting block; 9. Connecting rod two; 10. Connecting rod three; 11. Tensioning block; 12. Threaded rod two; 13. Clamping block; 14. Slide groove; 15. Anti-slip texture; 16. Hexagonal nut. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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 utility model according to the specific circumstances.

[0028] Example 1: like Figures 1 to 4 As shown, this embodiment provides a tensioning fixture for a thin-walled part, comprising: a support frame 1 for supporting the component; a base 2 arranged on the support frame 1; a lifting component including a threaded rod 3 disposed on the base 2, and a sleeve 5 threadedly connected to the threaded rod 3; a movable component including a moving block 6, which is slidably connected to the threaded rod 3 and rotatably connected to the sleeve 5, and a connecting rod 7 hinged to the moving block 6, and a connecting block 8 hinged to the connecting rod 7; a clamping component including a tensioning block 11 disposed on the connecting block 8, and a clamping block 13 slidably connected to the tensioning block 11; and an expansion component including anti-slip grooves 15 formed on the sleeve 5.

[0029] Understandable, Figure 1 This illustration only shows some of the components of the tensioning fixture. It should be clarified that the actual shape, size, location within the overall structure, and construction method of these components are not subject to change. Figure 1 The given illustrations are limited. In other words, in practical applications and design processes, tensioning fixtures can include, compared to... Figure 1 The diagram shows a greater number of components to achieve more complex or specific functions; it may also contain only a smaller number of components. Figure 1 Fewer components to meet the needs of simple scenarios.

[0030] Furthermore, during the entire use of the tensioning fixture, the support frame 1 plays a crucial load-bearing role, stably supporting the base 2 and other components, providing fundamental support for the stable operation of the entire fixture. When the tensioning fixture needs to be operated, the sleeve 5 is rotated, allowing it to move along the threaded rod 3. During the movement of the sleeve 5, the moving block 6 moves along with it. The moving block 6 further applies a pushing force to the connecting block 8 through the connecting rod 7, causing the connecting block 8 to shift. The connecting block 8 then drives the tensioning block 11, ensuring that the tensioning block 11 is accurately aligned with the inner wall of the thin-walled part. The surface of the sleeve 5 is provided with anti-slip textures 15, which can significantly increase the friction when rotating the sleeve 5, achieving initial positioning of the fixture and initial contact between the tensioning block 11 and the thin-walled part, effectively preventing slippage during the rotation of the sleeve 5, and ensuring the stability and safety of the operation.

[0031] Specifically, the lifting assembly includes a cylinder 4, which is disposed at one end of the threaded rod 3.

[0032] In this embodiment, the cylinder 4 is fixed to one end of the threaded rod 3, providing a hinge fulcrum for the connecting rod 9 and connecting rod 10 of the subsequent movable components, providing a stable hinge foundation for the movable components, and ensuring smooth subsequent movement of the movable components.

[0033] Specifically, the movable components include: connecting rod 2 9, one end of which is hinged to the bottom end of cylinder 4 and the other end of which is hinged to the bottom end of connecting block 8; connecting rod 3 10, one end of which is hinged to the top end of cylinder 4 and the other end of which is hinged to the top end of connecting block 8.

[0034] As a preferred implementation, when the moving block 6 moves, the connecting rod 7 simultaneously pushes the connecting block 8. At the same time, the connecting rods 9 and 10 provide auxiliary support and guidance from the bottom and top of the connecting block 8, respectively, effectively restricting the direction of movement of the connecting block 8. This makes the movement of the connecting block 8 more stable and minimizes the possibility of the connecting block 8 deviating during movement. This ensures that the tensioning block 11 can be accurately aligned with the inner wall of the thin-walled part, laying a solid foundation for the subsequent stable and precise tensioning operation of the thin-walled part.

[0035] Example 2: Specifically, the clamping assembly includes: a threaded rod 12, which is threadedly connected to the tensioning block 11 and rotatably connected to the clamping block 13; and a sliding groove 14, which is formed on the tensioning block 11 and slidably connected to the clamping block 13.

[0036] In this embodiment, when the threaded rod 12 is rotated, it moves along the tensioning block 11, thereby pushing the clamping block 13 to slide along the groove 14 on the tensioning block 11. By adjusting the contact force between the clamping block 13 and the outer wall of the thin-walled part, the clamping effect on the thin-walled part can be enhanced, avoiding problems such as loosening or displacement of the thin-walled part. Moreover, it can flexibly adapt to thin-walled parts with different wall thicknesses to meet diverse production and usage needs.

[0037] Specifically, the extension component includes a hexagonal nut 16, which is arranged on the sleeve 5 and threadedly connected to the threaded rod 3.

[0038] The hexagonal nut 16 assists in turning, allowing the operator to rotate the sleeve 5 more easily and accurately, thereby achieving the initial positioning of the tooling and the initial contact between the tensioning block 11 and the thin-walled part.

[0039] Example 3: Specifically, the tensioning block 11 is L-shaped.

[0040] The L-shaped tensioning block 11, by conforming to the corner of the inner wall of the thin-walled part on both its transverse and longitudinal surfaces, increases the contact area with the thin-walled part and improves the fit between the tensioning block 11 and the thin-walled part. During the tensioning operation, the uniform distribution of force prevents excessive deformation of the thin-walled part due to excessive local force concentration, thus ensuring that the thin-walled part maintains its original shape and structural integrity during the tensioning process, providing a stable and reliable guarantee for subsequent processing or use.

[0041] Specifically, the clamping block 13 is made of rubber.

[0042] In this embodiment, when the rubber clamping block 13 contacts the inner wall of the thin-walled part, it uses the elastic deformation of the rubber to conform to the surface of the part, while increasing the friction with the part, avoiding scratching the surface of the thin-walled part by the clamping block 13, enhancing clamping stability, and preventing the part from sliding during processing.

[0043] In actual use, the user first places the thin-walled round tube on the tensioning block 11. Then, the user starts to rotate the sleeve 5, causing it to move upward through the thread, which in turn drives the moving block 6 to move upward simultaneously. At this time, the connecting rod 7 connected to the moving block 6 and the connecting block 8 drives the connecting block 8 to move outward and upward, and at the same time drives the connecting rods 9 and 10 on the cylinder 4 to rotate. Finally, the outer wall of the tensioning block 11 comes into close contact with the inner wall of the thin-walled round tube, completing the tensioning of the thin-walled round tube. In order to further enhance the clamping stability of the thin-walled round tube, the user can rotate the threaded rod 12 to push the clamping block 13, thereby completing the external clamping action of the round tube, so that the thin-walled round tube can maintain a more stable state during processing, effectively avoiding problems such as shaking and displacement, and ensuring processing accuracy and quality.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tensioning fixture for thin-walled parts, characterized in that, include: Support frame (1) is used to support components; The base (2) is arranged on the support frame (1); The lifting assembly includes a threaded rod (3) disposed on the base (2) and a sleeve (5) threadedly connected to the threaded rod (3). The movable component includes a movable block (6), which is slidably connected to a threaded rod (3) and rotatably connected to a sleeve (5), and also includes a connecting rod (7) hinged to the movable block (6), and a connecting block (8) hinged to the connecting rod (7). The clamping assembly includes a tensioning block (11) disposed on the connecting block (8) and a clamping block (13) slidably connected to the tensioning block (11). The extension component includes anti-slip texture (15) formed on the sleeve (5).

2. The internal tensioning fixture for a thin-walled part according to claim 1, characterized in that, The lifting assembly includes: A cylinder (4) is set at one end of the threaded rod (3).

3. The internal tensioning fixture for thin-walled parts according to claim 2, characterized in that, The active components include: Connecting rod 2 (9) has one end hinged to the bottom end of cylinder (4) and the other end hinged to the bottom end of connecting block (8); Connecting rod three (10) is hinged at one end to the top of cylinder (4) and at the other end to the top of connecting block (8).

4. The internal tensioning fixture for a thin-walled part according to claim 3, characterized in that, The clamping assembly includes: Threaded rod 2 (12) is threadedly connected to tensioning block (11) and rotatably connected to clamping block (13); The groove (14) is formed on the tensioning block (11) and is slidably connected to the clamping block (13).

5. The internal tensioning fixture for a thin-walled part according to claim 4, characterized in that, The extended components include: A hexagonal nut (16) is placed on the sleeve (5) and threaded to the threaded rod (3).

6. The internal tensioning fixture for a thin-walled part according to claim 5, characterized in that, The tensioning block (11) is L-shaped.

7. The internal tensioning fixture for a thin-walled part according to claim 6, characterized in that, The clamping block (13) is made of rubber.

8. The internal tensioning fixture for a thin-walled part according to claim 1, characterized in that, The bottom of the support frame (1) is provided with support legs.

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