一种基于三明治复合结构的新型自锁高耐磨性高防腐性自攻螺套
By adopting a sandwich composite structure for self-tapping inserts, the tapered metal layer is embedded inside the workpiece to deform and achieve self-locking, the guide ring ensures vertical assembly, and the carburized and electroplated layers improve wear resistance and corrosion resistance. This solves the problem of poor self-locking ability of self-tapping inserts in soft materials and achieves a highly reliable connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING TIEMA IND GRP
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-17
Smart Images
Figure CN224515629U_ABST
Abstract
Claims
1. A new type of self-locking high wear resistance high anticorrosion self tapping sleeve based on sandwich composite structure, characterized in that: It includes a threaded sleeve (1) and a tapered metal layer (5); The threaded sleeve (1) comprises, from the inside out, a threaded sleeve body (101), a carburized layer (7), and an electroplated layer (8); The sleeve body (101) is a cylindrical structure with a hollow interior and open ends. The outer surface of the cylinder is machined with external threads (2), and the inner surface is machined with internal threads (3). The end of the threaded sleeve (1) that enters the workpiece is provided with a conical metal layer (5), the conical metal layer (5) is a ring-shaped structure, and the cross-sectional profile of one side wall of the ring along the axial direction is a right trapezoid shape; In use, the conical metal layer (5) is embedded inside the workpiece and undergoes deformation; The sleeve (1) has several slotted holes (6) at intervals on the side wall near the tapered metal layer (5).
2. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 1, characterized in that: A guide ring (4) is provided at one end of the threaded sleeve (1) near the conical metal layer (5); The guide ring (4) is a circular ring structure, with one side connected to the outermost external thread (2) and the other side chamfered to fit the inner end face of the threaded sleeve (1); The outer wall of the guide ring (4) is inclined, so that the end of the external thread (2) to the end face of the inner hole of the thread sleeve (1) is constricted.
3. A novel self-locking, high-wear-resistant, and high-corrosion-resistant self-tapping screw insert based on a sandwich composite structure according to claim 2, characterized in that: The slope of the guide ring (4) is 15°, that is, the angle between the slope and the axial direction of the inner hole of the threaded sleeve (1) is 15°.
4. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 2, characterized in that: The inclined surface length of the guide ring (4) is twice the pitch; the pitch of the external thread (2) is equal to the pitch of the internal thread (3).
5. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 2, characterized in that: The guide ring (4) and the screw sleeve body (101) are integrally formed. The outer side of the guide ring (4) is provided with a carburized layer (7) and an electroplated layer (8).
6. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 1, characterized in that: The conical metal layer (5) has a ring-shaped structure. The cross-sectional profile of one side wall of the ring along the axial direction is a right trapezoid, and the inner ring is an inclined surface. The inner hole of the conical metal layer (5) is frustum-shaped, with two circular cross sections of different diameters at the top and bottom. The side is a uniformly transitioning conical surface, and the end closer to the screw sleeve (1) is the small diameter end, while the end farther away from the screw sleeve (1) is the large diameter end.
7. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 1, characterized in that: The conical metal layer (5) and the screw sleeve body (101) are integrally formed. The outer side of the conical metal layer (5) is provided with a carburized layer (7) and an electroplated layer (8).
8. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 1, characterized in that: The side wall of the threaded sleeve (1) has two strip holes (6), which are symmetrically arranged.
9. A novel self-locking, high-wear-resistant, and high-corrosion-resistant self-tapping insert based on a sandwich composite structure according to claim 1, characterized in that: The surface of the threaded sleeve body (101), including the inner ring and the outer ring, is uniformly covered with a carburized layer (7), and the thickness of the carburized layer (7) on one side of the inner ring and the outer ring is 500 μm.
10. A new type of self-locking high wear resistance high anticorrosion self tapping screw sleeve based on sandwich composite structure according to claim 1 characterized in that: The surface of the carburized layer (7) includes an inner ring and an outer ring, and is uniformly covered with an electroplated layer (7), and the thickness of the electroplated layer (7) on one side of the inner ring and the outer ring is 12 μm.