Torque loss prevention fixing and clamping mechanism

Abstract

Torque anti-damage fixing and clamping mechanism, the clamping mechanism is used for clamping joint, the contact surface of the upper fixed frame and the lower fixed frame is respectively provided with an upper cavity and a lower cavity accommodating the joint; the side surface of the upper fixed frame and the lower fixed frame is respectively provided with a plurality of grooves, and the clamping plate is provided with a plurality of corresponding protrusions; the other side of the upper fixed frame and the lower fixed frame is connected through bolts; after the upper fixed frame and the lower fixed frame are placed into the joint and are closed and spliced, the bolts are screwed, and the protrusions of the clamping plate are embedded into the grooves, so that the clamping of the joint is completed. The torque transmission assembly fixes the long sleeve and transmits torque to it, drives circumferential rotation, and obtains the required pre-tightening force between the joint and the thread connection. The utility model can fix the joint through the clamping mechanism, fix the long sleeve through the torque transmission assembly and drive it to rotate, can ensure that the workpiece does not slip and is not damaged when a large pre-tightening torque is applied, has the advantages of reliable clamping, remarkable anti-damage effect and high operation efficiency.

Description

Technical Field

[0001] This utility model relates to auxiliary tools for machining and manufacturing, specifically a torque-damage-prevention fixing and clamping mechanism. Background Technology

[0002] In machining, piping connections, or drilling equipment, shaft-type joints often require threaded connections with long sleeves. To ensure the reliability of the connection, a large preload torque is usually required during threaded connection. However, in existing technologies, the following problems easily occur when using conventional chucks or clamps for fixing: 1. Insufficient clamping force: The clamping force of traditional jaws is limited and cannot meet the high torque thread preload requirements;

[0003] 2. Workpiece damage: During the application of high torque, the workpiece surface is easily pinched or locally deformed, affecting the joint accuracy and service life;

[0004] 3. Low operating efficiency: The workpiece position needs to be adjusted repeatedly, the clamping process is complicated, and the efficiency is low.

[0005] Therefore, a fixed clamping mechanism that can withstand high torque and effectively prevent workpiece damage is needed to ensure the stability and safety of the assembly process. Summary of the Invention

[0006] This invention aims to solve existing problems by providing a torque-damage-prevention fixing clamping mechanism suitable for situations where a large preload torque is applied during threaded connections.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is used to clamp the joint and the long sleeve connected by thread tightening, including a clamping mechanism and a torque transmission component.

[0008] The clamping mechanism is used to clamp the joint, including an upper fixed frame, a lower fixed frame, and a clamping plate that are joined together. The contact surfaces of the upper and lower fixed frames are respectively provided with upper and lower cavities for accommodating the joint. The sides of the upper and lower fixed frames are respectively provided with several grooves, and the clamping plate is provided with several corresponding protrusions. The other side of the upper and lower fixed frames is connected by a set of bolts. After the joint is inserted into the upper and lower fixed frames and joined together, the bolts are screwed into the upper and lower fixed frames, and the protrusions of the clamping plate are embedded in the grooves to complete the clamping of the joint.

[0009] The torque transmission assembly fixes the long sleeve and transmits torque to it, driving circumferential rotation to obtain the preload required for the threaded connection with the joint.

[0010] The upper end face of the other side of the lower fixing frame is provided with several vertical bolt holes, and the other side of the upper fixing frame is provided with corresponding through holes. Several bolts pass through the through holes and bolt holes respectively to form a fixed connection.

[0011] The grooves and protrusions are distributed horizontally.

[0012] The torque transmission component includes a force transmission body and a U-shaped block. The force transmission body includes a cylindrical fixed tube, and the end face of the fixed tube is also provided with a clamping block extending axially. The clamping block and the U-shaped block are joined together by another set of bolts to clamp the long sleeve.

[0013] This also includes a rear base, the upper end of which is V-shaped, supporting the torque transmission assembly. Several rollers are mounted on each of the two branches of the V-shape, and the upper ends of these rollers guide the torque transmission assembly to rotate circumferentially.

[0014] This also includes a connector, whose two ends are respectively connected to the torque transmission component and the external force application tool. The contact surface between the connector and the torque transmission component has several stepped cross-sections.

[0015] Among them, the contact ring surface between the clamping mechanism and the outer wall of the joint, or between the torque transmission component and the outer wall of the long sleeve, is provided with a damage-proof bushing.

[0016] The anti-damage bushing is made of polyester.

[0017] Compared with existing technologies, this invention uses a clamping mechanism to fix the joint and a torque transmission component to clamp and drive the long sleeve to rotate. This ensures that the workpiece does not slip or get damaged when a large preload torque is applied. It has advantages such as reliable clamping, significant damage prevention, and high operating efficiency, and is suitable for applications requiring high-torque threaded assembly, such as machining and pipe connections. The damage bushing prevents damage to the workpiece surface from rigid clamping, achieving high-strength and stable assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional view of the clamping mechanism;

[0021] Figure 4 This is a cross-sectional view of the clamping mechanism;

[0022] Figure 5 This is a schematic diagram of the torque transmission component.

[0023] See attached figures: front base 1; clamping mechanism 2; upper fixing frame 21, lower fixing frame 22, clamping plate 23; anti-damage bushing 3; torque transmission assembly 4, U-shaped block 41, force transmission body 42, connecting piece 43; rear base 5. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] See Figures 1 to 5 , Figures 1 to 5 This illustration showcases one embodiment of the present invention, which mainly includes a front base, a clamping mechanism, a damage-resistant bushing, a torque transmission assembly, and a rear base. The clamping mechanism and torque transmission assembly respectively clamp the connector and the long sleeve, which are to be screwed together via a threaded structure. The clamping mechanism includes an upper fixed frame and a lower fixed frame that are joined together, as well as a side clamping plate; the clamping mechanism is mainly used for positioning and clamping the connector. The contact surfaces of the upper and lower fixed frames are respectively provided with an upper cavity and a lower cavity for accommodating the connector. In this embodiment, both the upper and lower cavities are semi-circular grooves to fit the outer wall of the connector; the lower end of the lower fixed frame is also connected to the upper end of the front base.

[0026] See Figure 1 The upper and lower fixing frames each have several horizontal grooves on the same side, with the openings facing the side. Correspondingly, one side of the card plate has several corresponding protrusions, the shape and size of which are adapted to the grooves. When the protrusions of the card plate are inserted into the grooves, a joint is formed between the two on that side.

[0027] The upper and lower fixing brackets are connected on the other side by the first set of bolts. See details. Figure 1 The upper surface of the lower fixing frame on the other side has three bolt holes arranged vertically, and the other side of the upper fixing frame has three corresponding through holes. During assembly, the three bolts pass through the through holes and bolt holes respectively, forming a fixed connection between the two on that side.

[0028] The clamping mechanism uses a clamping plate for limiting clamping on one side and bolts for fixing on the other side, thus forming a lever structure of "bolt fixing + clamping plate pressing". This can further amplify the locking force, making the clamping reliable and the force evenly distributed. When the upper and lower fixing frames clamp the joint, a reliable clamping space is formed by the pressing of the clamping plate.

[0029] See Figure 4 Existing clamping mechanisms typically employ bolt-locked fixing structures on both sides, with the fulcrum of the resulting lever structure located at point O in the diagram, which is the midpoint of the contact annular surface between the outer wall of the connector and the inner wall of the upper cavity. In this embodiment, by modifying one side into a locking and limiting structure using a clamping plate, the design of the clamping plate allows for a greater downward force on that side of the upper fixing frame, resulting in partial deformation of the structure. This causes the new fulcrum of the lever structure to shift to the right to point O' in the diagram. At this point, the distance from the line of action of the bolt locking force to the new fulcrum O' increases, the orthogonal decomposition analysis of the locking force lever arm also increases, and the locking torque provided by the bolt also increases, effectively amplifying the locking torque.

[0030] As a preferred option, the interface between the card plate and the mounting bracket has a slight angle design to facilitate insertion; the card plate can also be fixed to the mounting bracket by a thumb-type locking device to achieve quick assembly and disassembly.

[0031] See Figure 1 , Figure 2 and Figure 5 The torque transmission assembly is cylindrical in shape, with a central hole to accommodate a long sleeve. The assembly primarily serves to fix the long sleeve and transmit torque to it, driving circumferential rotation. Specifically, it includes a force transmission body and a U-shaped block. The force transmission body comprises a cylindrical fixing tube, with a clamping block extending axially along the workpiece at its end face. The clamping block has an arc-shaped cross-section (semi-circular in this embodiment). The clamping block and a U-shaped block with a similarly semi-circular cross-section are joined together by another set of three bolts to clamp the long sleeve. The force transmission body serves for centering and positioning, and also reduces errors caused by bushing deformation. See also... Figure 1 The torque transmission assembly has a rear base below it, with the upper end of the rear base forming a V-shape, supporting the torque transmission assembly. Furthermore, rollers are symmetrically mounted on the two ends of the V-shape, with the upper ends of the rollers guiding the torque transmission assembly to rotate circumferentially. This roller support structure supports the rotation of the torque transmission assembly, while also aiding in centering, reducing friction during rotation, and improving stability and operational efficiency when applying large preload torques.

[0032] See Figure 1 and Figure 2 It also includes a connector, whose two ends are respectively connected to the torque transmission assembly and an external force-applying tool (existing technology) to ensure reliable torque transmission. Preferably, the contact surface between the connector and the torque transmission assembly has several stepped sections to further stabilize the transmitted torque.

[0033] See Figure 1 and Figure 2 The contact ring surfaces between the clamping mechanism and the connector, and between the torque transmission component and the long sleeve, are respectively equipped with anti-damage bushings. Two anti-damage bushings are respectively fitted onto the outer wall of the connector and the outer wall of the long sleeve to buffer the clamping force and prevent surface scratches. The anti-damage bushings are preferably made of high-strength, wear-resistant, and elastic polyester material, which is easy to disassemble and replace.

[0034] In use, first screw the threaded part of the shaft-type connector into the long sleeve, adjust and assemble the clamping mechanism on the front base to ensure the anti-damage bushing is tightly fitted and locked to the workpiece. Then, apply a preload torque to the long sleeve through the torque transmission assembly on the rear base. The clamping mechanism ensures that the workpiece does not slip or rotate under high torque, while the anti-damage bushing prevents damage to the workpiece surface from rigid clamping, thus achieving high-strength and stable assembly.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Those skilled in the art can make adjustments as needed. All equivalent structural transformations made using the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model and should be protected by this utility model.

Claims

1. A torque-damage-prevention fixing clamping mechanism for respectively clamping a joint and a long sleeve connected by threaded tightening, characterized in that: Includes a clamping mechanism and a torque transmission assembly; among which, The clamping mechanism is used to clamp the joint, including an upper fixed frame, a lower fixed frame, and a clamping plate that are joined together; the contact surfaces of the upper fixed frame and the lower fixed frame are respectively provided with an upper cavity and a lower cavity for accommodating the joint; the sides of the upper fixed frame and the lower fixed frame are respectively provided with several grooves, and the clamping plate is provided with several corresponding protrusions; the other side of the upper fixed frame and the lower fixed frame are connected by a set of bolts; after the joint is inserted and joined together, the upper fixed frame and the lower fixed frame are respectively screwed into the bolts, and the protrusions of the clamping plate are embedded in the grooves; The torque transmission assembly fixes the long sleeve and transmits torque to it, driving circumferential rotation to obtain the preload required for the threaded connection with the joint.

2. The torque-prevention fixing clamping mechanism according to claim 1, characterized in that: The upper end face of the other side of the lower fixing frame is provided with several vertical bolt holes, and the other side of the upper fixing frame is provided with corresponding through holes. Several bolts pass through the through holes and bolt holes respectively to form a fixed connection.

3. The torque-prevention fixing clamping mechanism according to claim 1 or 2, characterized in that: The grooves and ridges are distributed horizontally.

4. The torque-prevention fixing clamping mechanism according to claim 1, characterized in that: The torque transmission assembly includes a force transmission body and a U-shaped block. The force transmission body includes a cylindrical fixed tube, and the end face of the fixed tube is also provided with a clamping block extending along the axial direction. The clamping block and the U-shaped block are joined together by another set of bolts to clamp the long sleeve.

5. The torque-damage-prevention fixing clamping mechanism according to claim 1 or 4, characterized in that: It also includes a rear base, the upper end of which is V-shaped, and the upper end of the V-shape supports the torque transmission component.

6. The torque-damage-prevention fixing clamping mechanism according to claim 5, characterized in that: Several rollers are installed on each of the two V-shaped branches, and the upper end of the rollers guides the torque transmission component to rotate circumferentially.

7. The torque-damage-prevention fixing clamping mechanism according to claim 1 or 4, characterized in that: It also includes connectors, with the torque transmission component and the external force application tool connected to each end of the connector.

8. The torque-damage-prevention fixing clamping mechanism according to claim 7, characterized in that: The contact surface between the connector and the torque transmission assembly has several stepped cross-sections.

9. The torque-prevention fixing clamping mechanism according to claim 1 or 4, characterized in that: The contact surfaces between the clamping mechanism and the outer wall of the connector, and / or between the torque transmission assembly and the outer wall of the long sleeve, are provided with anti-damage bushings.

10. The torque-damage-prevention fixing clamping mechanism according to claim 9, characterized in that: The damage-resistant bushing is made of polyester.

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