Double-protected self-locking anchor head for anchor rod
Patent Information
- Application Number
- CN202522396671.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-11-11
AI Technical Summary
[0003]现有技术中的锚杆锚头多采用单一自锁防护结构，仅依靠单个部件实现限位固定，在长期受力或岩土体轻微变形时，易出现自锁松动问题，难以维持稳定的加固效果；同时，多数锚头壳未设置专门的防腐蚀与防磕碰保护结构，在潮湿、腐蚀性环境或安装运输过程中，锚头壳易受侵蚀或碰撞损坏，缩短使用寿命，为此，提出一种双层保护自锁锚杆锚头
该实用新型通过第一锥形杆头、扩板件、锚固件、第二锥形杆头、限位架与反推块的配合，拉动杆体时扩板件推动锚固件翻转，第二锥形杆头带动限位架抵住锚固件且反推块限位，实现双重防护，具有提升自锁稳固性的好处，解决单一防护易松动问题；通过锚头壳外部涂覆防护涂层，实现防腐蚀保护，具有减少环境侵蚀的好处，解决锚头壳易腐蚀损坏问题；通过锚头壳前端套设保护套，实现防磕碰保护，具有延长使用寿命的好处，解决锚头壳前端易受损问题；通过杆体端部螺杆、活动限位板与螺纹配合的螺母，实现安装定位调节，具有安装便捷的好处，解决安装定位难问题。
Smart Images
Figure CN224742395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anchor bolts and anchor heads, and in particular to a double-layer protective self-locking anchor bolt head. Background Technology
[0002] Self-locking anchor heads are widely used in geotechnical engineering, mining, tunnel support and other fields. They are mainly used to reinforce rock and soil. Through the stable connection between the anchor head and the rock and soil, the support structure is safely fixed. They are key components to ensure the stability of the rock mass and prevent the risk of collapse. Their self-locking performance and protective effect directly affect the support quality and long-term safety of the overall project.
[0003] Existing anchor bolt heads mostly adopt a single self-locking protective structure, relying on only a single component for limiting and fixing. Under long-term stress or slight deformation of the soil and rock, the self-locking is prone to loosening, making it difficult to maintain a stable reinforcement effect. At the same time, most anchor head shells do not have a dedicated anti-corrosion and anti-collision protection structure. In humid or corrosive environments or during installation and transportation, the anchor head shell is easily corroded or damaged by collisions, shortening its service life. Therefore, a double-layer protective self-locking anchor bolt head is proposed. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a double-layer protective self-locking anchor head to solve the problems mentioned in the background section.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-layer protective self-locking anchor head, comprising: The rod body has an anchor head shell sleeved on one end. Inside the anchor head shell, the rod body has a first conical rod head, a second conical rod head, and a thrust block arranged in sequence. The first conical rod head has an expansion plate on both sides. An anchor is rotatably installed on both sides of the anchor head shell. The anchor is provided with a limit frame on one side of its interior, and the limit frame is rotatably connected to the anchor head shell. A protective coating is applied to the exterior of the anchor head shell; it provides effective corrosion protection for the anchor head shell and reduces the degree of erosion of the anchor head shell by the external environment. The protective coating can be an epoxy resin coating or a polyurethane coating. The protective sleeve is fitted over the front end of the anchor head shell; it can protect the front end of the anchor head shell from impacts and extend the overall service life of the anchor head shell. The protective sleeve can be made of high-density polyethylene or polyamide. A screw rod is located at one end of the rod body away from the anchor head shell. A limiting plate and a nut are installed on the outside of the screw rod. The limiting plate is movably connected to the screw rod, and the nut is connected to the screw rod through a threaded engagement. The positioning adjustment during the installation process can be achieved through the threaded engagement and the movable connection, which improves the convenience of the installation operation and effectively solves the problem of difficult positioning during installation. The coordinated action of the first conical rod head, the expanding plate, the anchor, the second conical rod head, the limiting frame, and the push block can drive the expanding plate to push the anchor to flip when the rod is pulled. The second conical rod head causes the limiting frame to abut against the anchor, and the push block abuts against the limiting frame at the same time. This can achieve double limiting protection for the anchor, significantly improve the self-locking stability of the anchor head, and effectively solve the loosening problem that is prone to occur in single protection structures.
[0006] Preferably, the rod body, the first conical rod head, the second conical rod head, and the thrust block are connected to each other in sequence, and a limiting protrusion ring is provided on the outer side of the anchor head shell located inside the protective sleeve. The limiting protrusion ring is used to limit the protective sleeve.
[0007] Preferably, the protective sleeve has a limiting groove on the outer side of the limiting protrusion ring, and the limiting groove is adapted to the limiting protrusion ring. The combination of the limiting groove and the limiting protrusion ring fixes the protective sleeve.
[0008] Preferably, an outer ring is provided on the outer side of the rod near the screw, and the outer ring is slidably connected to the rod.
[0009] Preferably, the outer ring has side cavities on both outer sides, and the side cavities are integrally formed with the outer ring. A limiting member is rotatably installed inside the side cavity, and an elastic reset member is installed on the inner side of the limiting member facing the side cavity. The elastic reset member enables the limiting member to automatically reset and automatically open outward.
[0010] Preferably, a limiting block is provided on the outer edge of the inner cavity of the side cavity, and the limiting block is fixedly connected to the outer ring. The rod body has equally spaced holes on the outer side near the screw. Fixing members are installed on both sides of the inner cavity of the outer ring, and the fixing members pass through the outer ring and extend into the inside of the holes. The limiting block is used to limit the flipping angle of the limiting member, and the holes are used to change the position of the outer ring as needed.
[0011] In summary, compared with the prior art, this utility model provides a double-layer protective self-locking anchor head, which has the following beneficial effects: This utility model utilizes the cooperation of a first conical rod head, an expanding plate, an anchor, a second conical rod head, a limiting frame, and a push block. When the rod is pulled, the expanding plate pushes the anchor to flip, the second conical rod head drives the limiting frame to abut the anchor, and the push block limits the position, achieving dual protection. This improves self-locking stability and solves the problem of easy loosening with single protection. The protective coating on the outside of the anchor head shell provides corrosion protection, reducing environmental erosion and solving the problem of easy corrosion and damage to the anchor head shell. The protective sleeve at the front end of the anchor head shell provides impact protection, extending its service life and solving the problem of easy damage to the front end of the anchor head shell. The screw at the end of the rod, the movable limiting plate, and the threaded nut enable installation and positioning adjustment, facilitating installation and solving the problem of difficult installation and positioning. Attached Figure Description
[0012] Figure 1 This is a three-dimensional view of the overall structure of this utility model.
[0013] Figure 2 This is a cross-sectional view of the anchor head shell structure of this utility model.
[0014] Figure 3 This is a three-dimensional view of the head structure of the rod body of this utility model.
[0015] Figure 4 This is a cross-sectional view of the outer ring structure of this utility model.
[0016] Explanation of reference numerals in the attached figures: 1. Rod body; 2. First conical rod head; 3. Second conical rod head; 4. Thrust block; 5. Expanding plate; 6. Anchor head shell; 7. Limiting frame; 8. Anchor; 9. Limiting protrusion ring; 10. Protective sleeve; 11. Protective coating; 12. Outer ring; 13. Side cavity; 14. Limiting component; 15. Elastic reset component; 16. Limiting block; 17. Hole; 18. Fixing component; 19. Screw; 20. Limiting plate; 21. Nut. Detailed Implementation
[0017] This utility model provides a technical solution: a double-layer protective self-locking anchor head. Please refer to [link / reference]. Figure 1 , Figure 2 ,and Figure 3 ,include: The rod body 1 has an anchor head shell 6 sleeved on one end. The rod body 1 is provided with a first conical rod head 2, a second conical rod head 3 and a push block 4 in sequence at the inner end of the anchor head shell 6. The first conical rod head 2 has an expansion plate 5 on both outer sides. The anchor head shell 6 is rotatably installed with an anchor 8 on both outer sides of the expansion plate 5. The anchor 8 has a limit frame 7 on one inner side and the limit frame 7 is rotatably connected to the anchor head shell 6. Protective coating 11 is applied to the exterior of the anchor head shell 6; The protective sleeve 10 is fitted onto the front end of the anchor head shell 6. The screw 19 is located at one end of the rod body 1 away from the anchor head shell 6. A limit plate 20 and a nut 21 are installed on the outside of the screw 19. The limit plate 20 is movably connected to the screw 19, and the nut 21 is connected to the screw 19 by a threaded engagement.
[0018] Please see Figure 1 and Figure 2 The rod body 1, the first conical rod head 2, the second conical rod head 3 and the push block 4 are connected to each other in sequence. The anchor head shell 6 is provided with a limiting protrusion ring 9 on the inner side of the protective sleeve 10. The limiting protrusion ring 9 is used to limit the protective sleeve 10.
[0019] Please see Figure 1 and Figure 2 The protective sleeve 10 has a limiting groove on the outer side of the limiting protrusion 9, and the limiting groove is adapted to the limiting protrusion 9. The combination of the limiting groove and the limiting protrusion 9 fixes the protective sleeve 10.
[0020] Please see Figure 1 and Figure 4 An outer ring 12 is provided on the side of the rod body 1 near the screw 19, and the outer ring 12 is slidably connected to the rod body 1.
[0021] Please see Figure 1 and Figure 4 The outer ring 12 has side cavities 13 on both sides of its outer side, and the side cavities 13 are integrally formed with the outer ring 12. A limiting member 14 is rotatably installed inside the side cavity 13. An elastic reset member 15 is installed on the inner side of the limiting member 14 facing the side cavity 13. The elastic reset member 15 enables the limiting member 14 to automatically reset and automatically open outward.
[0022] Please see Figure 1 and Figure 4 A limiting block 16 is provided on the outer edge of the inner cavity 13, and the limiting block 16 is fixedly connected to the outer ring 12. The rod body 1 has equally spaced holes 17 on the outer side near the screw 19. Fixing members 18 are installed on both sides of the inner side of the outer ring 12, and the fixing members 18 pass through the outer ring 12 and extend into the inner side of the holes 17. The limiting block 16 is used to limit the flipping angle of the limiting member 14, and the holes 17 are used to change the position of the outer ring 12 as needed.
[0023] Working principle: Insert one end of the anchor head shell 6, push the rod 1 to make the anchor head shell 6 move accordingly. When the end of the anchor head shell 6 is inserted into the top of the hole, pull the rod 1 to push the expansion plate 5 outward to push the front end of the anchor 8 and make its front end flip outward. At the same time, the second conical rod head 3 will collide with and flip the end of the limiting frame 7 near the anchor 8, so that the end of the limiting frame 7 near the anchor 8 abuts against the anchor 8. At this time, the expansion plate 5 and the limiting frame 7 abut against the anchor 8 together to achieve a double protection effect. With the help of the push block 4 to limit the end of the limiting frame 7, it prevents the limiting frame 7 from disengaging from limiting the anchor 8. As the rod 1 enters the hole, the outer ring 12 opens under the push of the elastic reset member 15. Under the cover of the limiting block 16, the flipping angle of the limiting member 14 is limited, which prevents the rod 1 from sliding outward and improves the stability of the rod 1 in the hole. Rotating the nut 21 fixes the limiting plate 20 to the outside of the screw 19, completing the installation of the anchor head.
Claims
1. A double-layer protective self-locking anchor head, characterized in that, include: A rod body (1) is fitted with an anchor head shell (6) at one end. The rod body (1) is provided with a first conical rod head (2), a second conical rod head (3) and a push block (4) in sequence at one end inside the anchor head shell (6). The first conical rod head (2) is provided with an expansion plate (5) on both sides outside. The anchor head shell (6) is rotatably installed with an anchor (8) on both sides outside the expansion plate (5). The anchor (8) is provided with a limit frame (7) on one side inside, and the limit frame (7) is rotatably connected to the anchor head shell (6). A protective coating (11) is applied to the exterior of the anchor head shell (6); A protective sleeve (10) is fitted onto the front end of the anchor head shell (6); A screw (19) is located at one end of the rod body (1) away from the anchor head shell (6). A limiting plate (20) and a nut (21) are installed on the outside of the screw (19). The limiting plate (20) is movably connected to the screw (19), and the nut (21) is connected to the screw (19) by a threaded engagement.
2. The double-layer protective self-locking anchor head according to claim 1, characterized in that: The rod body (1), the first conical rod head (2), the second conical rod head (3) and the push block (4) are connected to each other in sequence, and the anchor head shell (6) is provided with a limit ring (9) on the side inside the protective sleeve (10).
3. The double-layer protective self-locking anchor head according to claim 2, characterized in that: The protective sleeve (10) has a limiting groove on the outer side of the limiting protrusion (9), and the limiting groove is adapted to the limiting protrusion (9).
4. The double-layer protective self-locking anchor head according to claim 1, characterized in that: An outer ring (12) is provided on the side of the rod (1) near the screw (19), and the outer ring (12) is slidably connected to the rod (1).
5. The double-layer protective self-locking anchor head according to claim 4, characterized in that: The outer ring (12) has side cavities (13) on both sides of its outer side, and the side cavities (13) are integrally formed with the outer ring (12). A limiting member (14) is rotatably installed inside the side cavity (13), and an elastic reset member (15) is installed on the inner side of the limiting member (14) facing the side cavity (13).
6. The double-layer protective self-locking anchor head according to claim 5, characterized in that: The inner outer edge of the side cavity (13) is provided with a limiting block (16), and the limiting block (16) is connected to the outer ring (12). The rod body (1) has equally spaced holes (17) on the outer side near the screw (19). Fixing members (18) are installed on both sides of the inner side of the outer ring (12), and the fixing members (18) penetrate the outer ring (12) and extend into the inner side of the holes (17).