A wedge-shaped expansion anchor
Patent Information
- Application Number
- CN202522689915.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-18
AI Technical Summary
[0003]目前，机械锚栓中的膨胀机构外壁多通过增设若干环槽以提高膨胀机构与混凝土孔的抓紧力，更有为了增加膨胀机构的形变多向性，采用多种结构不同的环槽，但是环槽的增加不仅会降低减少机械锚栓与钻孔壁的接触面积，更为造成膨胀机构与混凝土连接处的硬度降低，影响机械锚栓的稳固程度，降低整体承载力
1、本实用新型提出的楔形膨胀锚栓，在螺杆、螺套组件和大头凸起的基础上，对膨胀夹片进一步划分为阶梯环槽部、网纹面环部、凹槽环部和抵靠环体部，基于阶梯环槽部以及凹槽环部的侧壁厚度均小于网纹面环部和抵靠环体部的侧壁厚度，控制膨胀变形顺序，由阶梯环槽部和凹槽环部实现对膨胀夹片与大头凸起形成挤压过程的引导；
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Figure CN224919610U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of building engineering technology, and specifically relates to a wedge-shaped expansion anchor. Background Technology
[0002] Mechanical anchors, as a key post-anchoring connection, are widely used in various civil engineering fields such as buildings, bridges, and tunnels. Their core function is to safely and reliably connect external steel components such as steel plates, supports, and pipes to existing concrete substrates. This connection is an important technical link in realizing functions such as structural reinforcement, equipment installation, and curtain wall support. To ensure that the anchors form effective anchorage in the concrete, their design must include special mechanical locking mechanisms or expansion mechanisms, so that they can generate sufficient gripping force and mechanical interlock with the concrete hole wall after installation, thereby resisting the tensile and shear forces generated by external loads.
[0003] Currently, the expansion mechanism of mechanical anchors often has several annular grooves added to its outer wall to improve the gripping force between the expansion mechanism and the concrete hole. In order to increase the multi-directional deformation of the expansion mechanism, various annular grooves with different structures are used. However, the addition of annular grooves not only reduces the contact area between the mechanical anchor and the borehole wall, but also reduces the hardness of the connection between the expansion mechanism and the concrete, affecting the stability of the mechanical anchor and reducing the overall load-bearing capacity.
[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content
[0005] To solve the above problems, this application provides a wedge-shaped expansion anchor bolt, including: a screw and an expansion clip, a screw sleeve assembly is threaded onto the outer wall of the first end of the screw, a large end protrusion is coaxially connected to the second end of the screw, and an annular stop is provided on the outer wall of the screw, and the expansion clip located between the annular stop and the large end protrusion is slidably sleeved on the outer wall of the screw. The expansion clip includes a stepped annular groove, a textured annular section, a grooved annular section, and an abutting annular section connected in sequence. The abutting annular section faces the ring block, the stepped annular groove protrudes towards the larger end, and the outer wall of the textured annular section is provided with a mesh structure.
[0006] Furthermore, the outer wall mesh structure of the textured ring includes several first lines and second lines arranged in an array with opposite tilt angles, and the angle between the first lines and the second lines and the axial boundary line of the textured ring is 45° to 60°.
[0007] Furthermore, the axial length of the textured ring is 0.18-0.2 times the axial length of the expansion clip.
[0008] Furthermore, the included angle of the cross-section of the groove ring is 30° to 40°, and the groove depth of the groove ring is greater than one-third of the thickness of the expansion clip sidewall and less than one-half of the thickness of the expansion clip sidewall.
[0009] Furthermore, the first end of the expansion clip faces the ring block, the second end of the expansion clip faces the large end protrusion, and the inner wall of the second end of the expansion clip is provided with a first outwardly expanding inclined surface.
[0010] Furthermore, the axial length of the first outwardly expanding inclined surface is 0.2 to 0.3 times the axial length of the expansion clamp.
[0011] Furthermore, the side wall of the ring body is provided with a circumferential array of several protrusion blocks, including a first protrusion and a second protrusion arranged at intervals along the axial direction. One end of the second protrusion is connected to the groove ring, and one end of the first protrusion is connected to the first end of the expansion clip.
[0012] Furthermore, the height of the first protrusion is greater than the height of the second protrusion, and the axial length of the second protrusion is greater than the axial length of the first protrusion.
[0013] Furthermore, a number of through holes are arranged in a circumferential array against the side wall of the ring body. The through holes are located between two protruding blocks, and the through holes are located between the second protrusion and the first protrusion in the axial direction. Several partition slits are made in the side wall of the ring body corresponding to several through holes. One end of the partition slit is connected to the through hole, and the other end of the partition slit extends axially to the second end of the expansion clamp.
[0014] Furthermore, the inner wall of the expansion clip has corresponding first and second grooves for the second protrusion and the first protrusion.
[0015] Compared with the prior art, this application has the following advantages: 1. The wedge-shaped expansion anchor proposed in this utility model, based on the screw rod, screw sleeve assembly and large head protrusion, further divides the expansion wedge into a stepped annular groove, a textured surface annular groove, a grooved annular groove and an abutting annular body. Since the sidewall thickness of the stepped annular groove and the grooved annular groove are both less than the sidewall thickness of the textured surface annular groove and the abutting annular body, the expansion deformation sequence is controlled. The stepped annular groove and the grooved annular groove guide the extrusion process between the expansion wedge and the large head protrusion. 2. The textured ring, which is harder than the stepped and grooved rings, is pressed against the inner wall of the mounting hole. The mesh structure of the outer wall of the textured ring increases the friction with the inner wall of the mounting hole, providing a more stable anchoring effect and improving the overall tensile characteristic force value of the wedge expansion anchor. The abutment ring provides the stability of the overall structure of the expansion clip, ensuring the stability and durability of the wedge expansion anchor system.
[0016] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description and the accompanying drawings. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of a wedge-shaped expansion anchor bolt in an embodiment of this utility model is shown; Figure 2 A schematic diagram of the expansion clip unfolding in an embodiment of this utility model is shown; Figure 3 A partial cross-sectional schematic diagram of the expansion clip in an embodiment of this utility model is shown.
[0019] In the figure, 1 is the screw; 2 is the expansion clamp; 201 is the stepped annular groove; 202 is the textured annular part; 203 is the grooved annular part; 204 is the abutting annular part; 2041 is the first protrusion; 2042 is the second protrusion; 2043 is the through hole; 205 is the first outwardly expanding inclined surface; 206 is the first groove; 207 is the second groove; 3 is the screw sleeve assembly; 4 is the large-head protrusion; and 5 is the annular stop block. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] This utility model provides a wedge-shaped expansion anchor. Figure 1 A cross-sectional view of a wedge-shaped expansion anchor bolt according to an embodiment of the present invention is shown. Figure 1 and Figure 2 In the wedge-shaped expansion anchor, there are: a screw 1 and an expansion clamp 2. The outer wall of the first end of the screw 1 is threaded with a screw sleeve assembly 3, wherein the screw sleeve assembly 3 includes a nut and a washer. The second end of the screw 1 is coaxially connected to the large end protrusion 4, and the outer wall of the screw 1 is provided with a ring stop 5. The outer wall of the screw 1 is slidably sleeved with an expansion clamp 2 located between the ring stop 5 and the large end protrusion 4, in combination with... Figure 1 The outer wall of the screw 1 of the ring block 5 facing away from the expansion clip 2 has a smooth surface with a predetermined spacing. The expansion clip 2 includes a stepped ring groove 201, a textured ring 202, a grooved ring 203, and an abutting ring 204 connected in sequence. The abutting ring 204 faces the ring block 5, the stepped ring groove 201 faces the large head protrusion 4, and the outer wall of the textured ring 202 is provided with a mesh structure.
[0022] In actual use, the threaded sleeve assembly 3 is threaded onto the outer wall of the first end of the screw rod 1, and a predetermined distance is maintained between the threaded sleeve assembly 3 and the first end of the screw rod 1. Before use, the operator uses tools to make a hole in a fixed block such as concrete, and then installs the wedge-shaped expansion anchor proposed in this application into the installation hole until the threaded sleeve assembly 3 is in contact with the surface of the fixed block such as concrete. Then, by rotating the threaded sleeve assembly 3, the screw rod 1 is moved outward from the installation hole as a whole, which causes the inner wall of the expansion wedge 2 to be squeezed against the outer wall of the large head protrusion 4, causing the expansion wedge 2 to expand outward, increasing the squeezing force between the outer wall of the expansion wedge 2 and the inner wall of the installation hole, and ensuring the firmness of the wedge-shaped expansion anchor proposed in this application in the installation hole.
[0023] The wedge-shaped expansion anchor proposed in this utility model, based on the screw 1, the screw sleeve assembly 3, and the large-head protrusion 4, further divides the expansion clamp 2 into a stepped annular groove portion 201, a textured surface annular portion 202, a grooved annular portion 203, and an abutting annular portion 204. Since the sidewall thicknesses of the stepped annular groove portion 201 and the grooved annular portion 203 are both less than the sidewall thicknesses of the textured surface annular portion 202 and the abutting annular portion 204, the expansion deformation sequence is controlled. The stepped annular groove portion 201 and the grooved annular portion 203 achieve control of the expansion... The clip 2 and the large protrusion 4 form a guide for the compression process; the textured ring 202, which is harder than the stepped ring groove 201 and the grooved ring 203, is compressed against the inner wall of the mounting hole, and the mesh structure of the outer wall of the textured ring 202 increases the friction with the inner wall of the mounting hole, providing a more stable anchoring effect and improving the overall tensile characteristic force value of the wedge expansion anchor. The abutting ring 204 provides the stability of the overall structure of the expansion clip 2, ensuring the stability and durability of the wedge expansion anchor system.
[0024] The outer wall mesh structure of the textured ring portion 202 includes several first lines and second lines arranged in an array with opposite inclination angles. The angle between the first lines and second lines and the axial boundary line of the textured ring portion 202 is 45° to 60°. The knurled mesh structure is formed by the several first lines and several second lines, ensuring the friction between the outer wall of the textured ring portion 202 and the outer wall of the mounting hole. In this embodiment, the mesh depth is 0.2-0.3mm.
[0025] Correspondingly, the axial length of the textured ring portion 202 is 0.18-0.2 times the axial length of the expansion clip 2. For example, the axial length of the textured ring portion 202 is 0.185 times the axial length of the expansion clip 2 to ensure the local hardness of the textured ring portion 202.
[0026] Furthermore, the included angle of the cross-section of the grooved ring 203 is 30° to 40°, and the groove depth of the grooved ring 203 is greater than one-third and less than half the thickness of the sidewall of the expansion clip 2. While providing space for the deformation of the textured ring 202, the hardness of the grooved ring 203 is limited to ensure the overall hardness of the expansion clip 2.
[0027] For example, the included angle of the cross section of the groove ring 203 is 35°, the groove depth of the groove ring 203 is 0.47 times the thickness of the side wall of the expansion clamp 2, and the axial length of the groove ring 203 is 0.04 times the axial length of the expansion clamp 2.
[0028] The expansion clip 2 has its first end facing the ring block 5 and its second end facing the large head protrusion 4. The inner wall of the second end of the expansion clip 2 is provided with a first outward expansion slope 205. During the process of the inner wall of the second end of the expansion clip 2 being squeezed by the outer wall of the large head protrusion 4, the first outward expansion slope 205 improves the smoothness of the outward expansion deformation of the textured ring portion 202 and improves the installation efficiency of the wedge-shaped expansion anchor.
[0029] The axial length of the first outwardly expanding inclined surface 205 is 0.2 to 0.3 times the axial length of the expansion clamp 2. For example, the angle between the first outwardly expanding inclined surface 205 and the inner wall of the expansion clamp 2 is 8 degrees, and the axial length of the first outwardly expanding inclined surface 205 is 0.25 times the axial length of the expansion clamp 2.
[0030] In this embodiment, a plurality of protruding blocks are arranged in a circumferential array on the side wall of the abutment ring portion 204. The protruding blocks include a first protrusion 2041 and a second protrusion 2042 arranged at intervals along the axial direction. One end of the second protrusion 2042 is connected to the grooved ring portion 203, and one end of the first protrusion 2041 is connected to the first end of the expansion clamp 2. The cross-sectional structure of the first protrusion 2041 is triangular, and the cross-sectional structure of the second protrusion 2042 is rhomboid. By setting different styles of protrusion structures, the bearing capacity of the anchor bolt is increased.
[0031] Correspondingly, the thickness of the side wall of the abutting ring 204 is the same as the thickness of the side wall of the expansion clip 2. The height of the first protrusion 2041 is greater than the height of the second protrusion 2042, and the axial length of the second protrusion 2042 is greater than the axial length of the first protrusion 2041. Through the design of the variation in the structural specifications of the first protrusion 2041 and the second protrusion 2042, the smoothness of the expansion clip 2 and the wedge-shaped expansion anchor being lowered into the installation hole is achieved.
[0032] For example, the height of the first protrusion 2041 is 0.53 times the thickness of the sidewall of the abutting ring portion 204; The height of the second protrusion 2042 is 0.41 times the thickness of the side wall of the abutting ring portion 204; The axial length of the second protrusion 2042 is 2.46 times the axial length of the first protrusion 2041; Correspondingly, the axial distance between the second protrusion 2042 and the first protrusion 2041 is 0.494 times the axial length of the second protrusion 2042.
[0033] Among them, a plurality of through holes 2043 are arranged in a circumferential array on the side wall of the ring body 204. The through holes 2043 are located between two protruding blocks, and the through holes 2043 are located between the second protrusion 2042 and the first protrusion 2041 in the axial direction. A number of partition slits are opened on the side wall of the ring body 204 corresponding to a number of through holes 2043. One end of the partition slit is connected to the through hole 2043, and the other end of the partition slit extends axially to the second end of the expansion clamp 2. While ensuring the overall structural integrity, the expansion clamp 2 is guided to expand outward through the through hole 2043 and the corresponding partition slits.
[0034] At the same time, refer to Figure 3 The inner wall of the expansion clip 2 has corresponding first protrusion 2041 and second protrusion 2042 and corresponding first groove 206 and second groove 207. On the basis of the compression formed between the first protrusion 2041 and second protrusion 2042 and the inner wall of the mounting hole, the first protrusion 2041 and second protrusion 2042 are added to convert the extrusion force of the first protrusion 2041 and second protrusion 2042 into the axial deformation force of the expansion clip 2, thereby increasing the upper limit of the extrusion force of the expansion clip 2 on the inner wall of the mounting hole.
[0035] To better illustrate the expansion wedge 2 of the wedge-shaped expansion anchor of this application, an example with an axial length of 20mm and a sidewall thickness of 1.7mm will be used: Correspondingly, the axial length of the textured ring 202 is 0.185 times the axial length of the expansion clip 2, which is 3.7 mm; The included angle of the cross-section of the groove ring 203 is 35°. The groove depth of the groove ring 203 is 0.47 times the thickness of the side wall of the expansion clip 2, which is 0.8 mm; The axial length of the groove ring 203 is 0.04 times the axial length of the expansion clip 2, which is 0.8 mm; The angle between the first outwardly expanding inclined surface 205 and the inner wall of the expansion clamp 2 is 8 degrees; The axial length of the first outwardly expanding inclined surface 205 is 0.25 times the axial length of the expansion clamp 2, which is 5 mm; The height of the first protrusion 2041 is 0.53 times the thickness of the side wall of the abutting ring 204, which is 0.9 mm; The height of the second protrusion 2042 is 0.41 times the thickness of the side wall of the abutting ring 204, which is 0.7 mm; The axial length of the second protrusion 2042 is 2.46 times the axial length of the first protrusion 2041. The axial length of the second protrusion 2042 is 7.4 mm, and the axial length of the first protrusion 2041 is 3 mm. Correspondingly, the axial distance between the second protrusion 2042 and the first protrusion 2041 is 0.494 times the axial length of the second protrusion 2042, which is 3.6 mm.
[0036] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] It should be understood that all terms used to indicate 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 the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation of the present invention.
[0038] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A wedge-shaped expansion anchor, characterized in that, include: The screw (1) and the expansion clamp (2) are provided. The screw (1) is threadedly connected to the outer wall of the first end of the screw (1) and the screw sleeve assembly (3) is threadedly connected to the second end of the screw (1) and the large end protrusion (4) is coaxially connected to the second end of the screw (1). The outer wall of the screw (1) is provided with a ring stop (5). The expansion clamp (2) located between the ring stop (5) and the large end protrusion (4) is slidably sleeved on the outer wall of the screw (1). The expansion clip (2) includes a stepped ring groove (201), a textured ring (202), a grooved ring (203), and an abutting ring (204) connected in sequence. The abutting ring (204) faces the ring block (5), the stepped ring groove (201) faces the large head protrusion (4), and the outer wall of the textured ring (202) is provided with a mesh structure.
2. The wedge-shaped expansion anchor bolt according to claim 1, characterized in that, The outer wall mesh structure of the textured ring (202) includes a plurality of first lines and second lines arranged in an array with opposite tilt angles. The angle between the first lines and the second lines and the axial boundary line of the textured ring (202) is 45° to 60°.
3. The wedge-shaped expansion anchor bolt according to claim 2, characterized in that, The axial length of the textured ring (202) is 0.18-0.2 times the axial length of the expansion clip (2).
4. The wedge-shaped expansion anchor bolt according to claim 2, characterized in that, The included angle of the cross section of the groove ring (203) is 30° to 40°, and the groove depth of the groove ring (203) is greater than one-third of the thickness of the side wall of the expansion clip (2) and less than one-half of the thickness of the side wall of the expansion clip (2).
5. The wedge-shaped expansion anchor bolt according to claim 4, characterized in that, The first end of the expansion clip (2) faces the ring block (5), the second end of the expansion clip (2) faces the large head protrusion (4), and the inner wall of the second end of the expansion clip (2) is provided with a first outward expansion slope (205).
6. The wedge-shaped expansion anchor bolt according to claim 5, characterized in that, The axial length of the first outwardly expanding inclined surface (205) is 0.2 to 0.3 times the axial length of the expansion clip (2).
7. The wedge-shaped expansion anchor bolt according to claim 2, characterized in that, The side wall of the abutting ring part (204) is provided with a plurality of protrusion blocks in a circumferential array. The protrusion blocks include a first protrusion (2041) and a second protrusion (2042) arranged at intervals along the axial direction. One end of the second protrusion (2042) is connected to the groove ring part (203), and one end of the first protrusion (2041) is connected to the first end of the expansion clip (2).
8. The wedge-shaped expansion anchor bolt according to claim 7, characterized in that, The height of the first protrusion (2041) is greater than the height of the second protrusion (2042), and the axial length of the second protrusion (2042) is greater than the axial length of the first protrusion (2041).
9. The wedge-shaped expansion anchor bolt according to claim 8, characterized in that, The side wall of the abutting ring part (204) is provided with a plurality of through holes (2043), the through holes (2043) are located between two protruding blocks, and the through holes (2043) are located between the second protrusion (2042) and the first protrusion (2041) in the axial direction; The side wall of the abutting ring part (204) has several partition slits corresponding to several through holes (2043). One end of the partition slit is connected to the through hole (2043), and the other end of the partition slit extends along the axial direction to the second end of the expansion clip (2).
10. The wedge-shaped expansion anchor bolt according to claim 9, characterized in that, The inner wall of the expansion clip (2) has corresponding first grooves (206) and second grooves (207) for the second protrusion (2042) and the first protrusion (2041).