Transfer jig for tubular workpieces

Abstract

The utility model discloses a kind of pipe-shaped workpieces are moved and are carried clamp, including base, gear box, cylinder, telescopic link, rack, clamping arm and clamp block, gear box is fixed on base, cylinder is installed between the two, cylinder drives telescopic link to drive rack linear motion, two installation cavities and the transmission cavity being communicated are equipped in gear box, rack extends into transmission cavity, the rotating portion of the end of two clamping arms is rotatably located in installation cavity and located rack both sides, linear motion of rack is converted into the rotation of clamping arm by meshing with rack, two clamp blocks are detachably installed on clamping arm, its inboard is equipped with the arc surface of adaptive pipe fitting, the utility model is driven by rack double-side synchronous meshing, compact structure, transmission precision, clamping centring is good, clamp block can be quickly replaced, and universality is strong, it is especially suitable for space limited automated moving and carrying scene.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe clamps, specifically a transfer clamp for tubular workpieces. Background Technology

[0002] In the fields of machining and automated production, the transfer and handling of tubular workpieces is a common operation. Currently, commonly used pipe clamps are mostly pneumatically or hydraulically driven, using linkages or cam mechanisms to open and close the clamping arms. These clamps often suffer from complex structures, large sizes, and poor adaptability in confined spaces. Furthermore, traditional clamps are typically designed for pipes of specific diameters, lacking versatility. Changing workpiece models requires replacing the entire clamp or making cumbersome adjustments, reducing production efficiency. Therefore, there is an urgent need for a specialized transfer clamp that is compact, flexible, and allows for quick replacement of clamping units to meet the requirements of modern automated production lines for flexibility and high efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a transfer fixture for tubular workpieces, which solves the technical problems of bulky structure, poor space adaptability and lack of versatility of traditional pipe fixtures. It realizes the driving of replaceable fixture blocks through a compact rack and pinion double-sided synchronous meshing transmission mechanism, achieving the beneficial effects of high-precision clamping and strong versatility.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a transfer fixture for tubular workpieces, comprising a base, characterized in that... A gearbox fixed to the base; The cylinder is installed between the base and the gearbox; The telescopic rod is powered by the cylinder; A rack fixed to the telescopic rod; The gearbox has two mounting cavities and a transmission cavity connecting the two mounting cavities, and the rack extends into the transmission cavity; Two clamping arms, each with a rotating part at its end, are rotatably disposed in the two mounting cavities and located on both sides of the rack, and engage with the rack. Two clamping blocks that are detachably fixed to the clamping arms; The rack is configured to move via a cylinder to drive the two clamping arms to rotate in opposite directions or in opposite directions, thereby clamping or releasing the workpiece.

[0005] In a further technical solution, the rack has meshing teeth on both sides and on both rotating parts.

[0006] A further technical solution is that the inner sides of the two clamping blocks that are close to each other are provided with arc-shaped surfaces for adapting to tubular workpieces.

[0007] In a further technical solution, a nut groove is provided on the clamping arm, and a bolt groove is provided on the clamping block. The clamping block and the clamping arm are detachably fixedly connected by the bolt and nut.

[0008] In a further technical solution, a rotating shaft is provided inside the mounting cavity, and the rotating part is fixed to the rotating shaft by a keyway.

[0009] In a further technical solution, the two ends of the rotating shaft are supported on the gearbox by bearings.

[0010] In a further technical solution, an inner clamp is provided on one side of the bearing to limit its axial displacement.

[0011] Further technical solutions also include a connecting plate for mounting the base onto the transfer platform.

[0012] In a further technical solution, the cylinder is installed between the base and the gearbox by means of screw fastening.

[0013] In summary, the advantages of the transfer fixture for tubular workpieces provided by this utility model compared to the prior art are as follows: Compact structure and efficient transmission: By embedding the cylinder between the base and the gearbox, and utilizing a rack to simultaneously drive two symmetrically distributed rotating parts, the power source is centralized and the transmission path is optimized. This design significantly reduces the overall size of the fixture, making it particularly suitable for transfer applications with limited installation space.

[0014] High clamping synchronization and precision: The double-sided meshing structure of the rack and pinion and the two rotating parts ensures that the cylinder can drive the two clamping arms to rotate in opposite directions or in opposite directions synchronously and at equal distances when it is in operation. This symmetrical drive method avoids the off-center load or jamming that may occur with single-sided drive, and ensures that the clamping center remains unchanged, which greatly improves the stability and centering of clamping. It is especially suitable for precision machining processes with high positioning accuracy requirements.

[0015] High versatility and modularity: The clamping blocks are detachably mounted on the clamping arms via bolt and nut slots. Operators can quickly replace clamping blocks with different curved surfaces according to different pipe diameters or workpiece shapes without replacing the entire clamp, greatly enhancing the equipment's versatility and production line flexibility, and reducing usage and maintenance costs.

[0016] Stable operation and long service life: The rotating part is supported in the gearbox by a shaft and bearings, and is axially positioned by an internal clamp, forming a stable and reliable rotary support structure. This design effectively reduces wear on moving parts, ensures stability during long-term repetitive operation, and extends the service life of the fixture. Attached Figure Description

[0017] 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 the front view of this application; Figure 2 This application Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a top view of this application; Figure 4 This application Figure 3 Cross-sectional view along the BB direction; In the diagram: 10. Base; 11. Gearbox; 12. Cylinder; 13. Clamping arm; 14. Clamping block; 15. Bearing; 16. Inner clamp; 17. Connecting plate; 18. Arc-shaped surface; 19. Tooth; 20. Rack; 21. Telescopic rod; 22. Mounting cavity; 23. Rotating shaft; 24. Transmission cavity; 25. Rotating part; 26. Nut groove; 27. Bolt groove. Detailed Implementation

[0018] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] like Figures 1-4 As shown, a transfer fixture for tubular workpieces includes a base 10, which is fixed to a connecting plate 17 by screws. The connecting plate 17 is fixed to a transfer platform. A gearbox 11 is fixed to the base 10. A cylinder 12 is installed between the base 10 and the gearbox 11 by screws. The cylinder 12 is powered by a telescopic rod 21, and a rack 20 is fixed to the telescopic rod 21. A groove is formed on the gearbox 11. Two mounting cavities 22 are provided, and a transmission cavity 24 is provided between the two mounting cavities 22. The rack 20 extends into the transmission cavity 24. The gearbox 11 is provided with two clamping arms 13, and each clamping arm 13 is provided with a rotating part 25. The two rotating parts 25 are respectively rotatably mounted in the mounting cavity 22 and located on both sides of the rack 20. The rack 20 meshes with the two rotating parts 25. A clamping block 14 is detachably fixedly connected to the two clamping arms 13. The two clamping blocks 14 are used to clamp tubular workpieces.

[0024] In one embodiment, teeth 19 are provided on both rotating parts 25 and on both sides of the rack 20, so that the two rotating parts 25 can mesh with the rack 20 respectively. The operation of the cylinder 12 drives the telescopic rod 21 to extend and retract, thereby controlling the rotation of the rotating parts 25, and then driving the clamping arm 13 to clamp the workpiece.

[0025] In one embodiment, the two clamping blocks 14 are respectively located on the side of the two clamping arms 13 that are close to each other, and the side of the two clamping blocks 14 that are close to each other is provided with an arc-shaped surface 18 to facilitate the adaptation of tubular workpieces.

[0026] In one embodiment, both clamping arms 13 are provided with nut grooves 26, and both clamping blocks 14 are provided with bolt grooves 27. By inserting screws into bolt grooves 27 and installing nuts in nut grooves 26, and then tightening the screws and nuts together, the clamping blocks 14 and clamping arms 13 are fixed together, which facilitates disassembly and replacement. Thus, different clamping blocks 14 can be selected according to different workpieces. The material of the clamping blocks 14 can be polyurethane.

[0027] In one embodiment, a rotating shaft 23 is rotatably installed in each of the two mounting cavities 22. The two rotating shafts 23 are respectively inserted into the two rotating parts 25 and fixed to the rotating parts 25 by means of keyways. Bearings 15 are installed between the two ends of the rotating shaft 23 and the gearbox 11 to facilitate the rotation of the clamping arm 13.

[0028] In one embodiment, an inner retainer 16 is provided on one side of the bearing 15 to limit the sliding of the bearing 15 and stabilize the rotation.

[0029] Its working principle is that the operation of the cylinder 12 drives the extension and retraction of the telescopic rod 21, thereby causing the rack 20 to slide, which in turn drives the rotating shaft 23 to rotate, thereby causing the clamping arm 13 to drive the clamping block 14 to clamp the workpiece.

[0030] For example: when cylinder 12 extends, it drives rack 20 to extend, rack 20 and clamping arm 13 mesh, clamping arm 13 expands, ready to clamp the pipe fitting; when cylinder 12 retracts, it drives rack 20 to retract, the teeth 19 on rack 20 and teeth 19 on rotating part 25 mesh, driving clamping arm 13 to clamp the pipe fitting, thus realizing the clamping operation of the pipe fitting.

[0031] This fixture can be used in horizontal movement applications to clamp vertically placed pipe fittings. The connecting plate 17 can be fixed to the transfer platform to achieve horizontal transfer of tubular workpieces, or it can be fixed in the vertical direction or on the transfer worktable to clamp horizontally placed pipe fittings for transfer. This fixture is simple in design, easy to manufacture, and lightweight, making it suitable for rapid transfer in applications with limited transfer space.

[0032] The method of using the transfer fixture for tubular workpieces described in this application is as follows: First, select a suitable clamping block 14 according to the diameter and shape of the tubular workpiece to be transferred. If it needs to be replaced, loosen the nut that fixes the clamping block 14 on the clamping arm 13 so that the bolt is disengaged from the nut groove 26 and the bolt groove 27, and the original clamping block can be removed. Align the new clamping block with the position so that the bolt groove 27 is aligned with the nut groove 26 on the clamping arm 13, insert the bolt and tighten the nut to complete the installation of the clamping block 14.

[0033] In use, the entire fixture is reliably installed and fixed on the designated position of the transfer platform by bolts through the connecting plate 17, and the pneumatic pipeline of the cylinder 12 is connected.

[0034] Workpiece clamping process: The control system sends a signal to the cylinder 12, the piston rod of the cylinder 12 extends, and pushes the telescopic rod 21 and the rack 20 fixed thereon to move. The teeth 19 on both sides of the rack 20 simultaneously mesh with the teeth 19 on the rotating parts 25 of the two clamping arms 13, driving the two rotating parts 25 to rotate synchronously around their respective rotating shafts 23, thereby causing the two clamping arms 13 and the clamping blocks 14 at their ends to open; the transfer platform moves, so that the two opened arc-shaped surfaces 18 move to the appropriate positions on both sides of the tubular workpiece.

[0035] Clamping and Transfer Process: The control system controls the cylinder 12 to reverse direction, the piston rod retracts, and drives the rack 20 to move in the opposite direction. The rack 20 drives the two rotating parts 25 to rotate synchronously through the meshing of the teeth 19, so that the two clamping arms 13 drive the clamping blocks 14 to close towards each other, and the tubular workpiece is clamped and fixed by the arc-shaped surface 18. After that, the transfer platform can carry the reliably clamped workpiece to the target position.

[0036] Workpiece release process: After the workpiece is transported to the target position, the cylinder 12 pushes the rack 20 again to open the clamping arm 13, and the arc surface 18 of the clamping block 14 disengages from the workpiece, releasing the workpiece to the designated position, completing one work cycle.

[0037] This fixture can be integrated into automated production lines through programmable control, enabling automatic, precise, and efficient transfer of tubular workpieces. It is particularly suitable for flexible production scenarios where installation space is limited and rapid changeover is required.

[0038] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0039] 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.

[0040] 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 transfer fixture for tubular workpieces, comprising a base (10), characterized in that, Gearbox (11) fixed to the base (10); Cylinder (12) installed between the base (10) and the gearbox (11); Telescopic rod (21) that is poweredly connected to the cylinder (12); A rack (20) fixed to the telescopic rod (21); The gearbox (11) has two mounting cavities (22) and a transmission cavity (24) connecting the two mounting cavities (22), and the rack (20) extends into the transmission cavity (24); Two clamping arms (13) are provided with rotating parts (25) at their ends. The two rotating parts (25) are rotatably disposed in the two mounting cavities (22) and located on both sides of the rack (20), and mesh with the rack (20); Two clamping blocks (14) are detachably fixed to the clamping arm (13). The rack (20) is configured to move via a cylinder (12) to drive the two clamping arms (13) to rotate toward or away from each other.

2. The transfer fixture for tubular workpieces according to claim 1, characterized in that: The rack (20) is provided with meshing teeth (19) on both sides and on both rotating parts (25).

3. The transfer fixture for tubular workpieces according to claim 1, characterized in that: The inner sides of the two clamp blocks (14) that are close to each other are provided with arc-shaped surfaces (18) for adapting to tubular workpieces.

4. The transfer fixture for tubular workpieces according to claim 1, characterized in that: The clamping arm (13) has a nut groove (26), and the clamping block (14) has a bolt groove (27). The clamping block (14) and the clamping arm (13) are detachably fixedly connected by the bolt and nut.

5. The transfer fixture for tubular workpieces according to claim 1, characterized in that: The mounting cavity (22) is provided with a rotating shaft (23), and the rotating part (25) is fixed to the rotating shaft (23) by keyway.

6. The transfer fixture for tubular workpieces according to claim 5, characterized in that: The two ends of the rotating shaft (23) are supported on the gearbox (11) by bearings (15).

7. The transfer fixture for tubular workpieces according to claim 6, characterized in that: The bearing (15) has an inner clamp (16) on one side for limiting its axial displacement.

8. The transfer fixture for tubular workpieces according to claim 1, characterized in that: It also includes a connecting plate (17) for mounting the base (10) onto the transfer platform.

9. The transfer fixture for tubular workpieces according to claim 1, characterized in that: The cylinder (12) is installed between the base (10) and the gearbox (11) by means of screw fastening.

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