Spin lock type expansion anchor bolt assembly
By adopting a rotary lock expansion anchor assembly in the exterior wall insulation system, and using the mechanical locking structure of the radial expansion part and the axial contraction part, the problem of unsolid anchoring is solved, and a higher pulling bearing capacity and construction adaptability are achieved.
Patent Information
- Application Number
- CN202421567346.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The anchor bolts in the existing exterior wall insulation system are prone to insolidity during the anchoring process, resulting in the insulation board falling off and the system cracking.
A rotary lock expansion anchor assembly is adopted, which includes an expansion body and an expansion nail, and the close contact with the wall and pulling bearing capacity is enhanced through a mechanical locking structure of the radial expansion part and the axial contraction part.
The pulling and bearing capacity in various types of walls is improved, especially the formation of locking knots in hollow walls, significantly improving the pulling and bearing capacity, and increasing the tolerance of construction drilling and ambient temperature tolerance.
Smart Images
Figure CN222772454U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of anchoring pieces, and in particular to a twist-lock expansion anchor assembly. Background Art
[0002] As one of the important auxiliary materials in the exterior wall insulation system, anchor bolts play the role of anchoring the insulation board and preventing it from falling off. The anchor bolts used for exterior wall insulation in related technologies need to match the wall type and have certain index requirements for the drill bit size. In actual applications, the anchoring is often not firm, which leads to the problem of cracking and falling off of the insulation system. Summary of the invention
[0003] In view of this, the present application provides a twist-lock expansion anchor assembly that can improve the pull-out bearing capacity.
[0004] In order to achieve the above objectives, this application is implemented through the following technical solutions:
[0005] A twist-lock expansion anchor assembly, characterized in that it comprises an expansion body and an expansion nail, the expansion body comprises a pan head and an expansion sleeve fixedly arranged with the pan head, the expansion sleeve comprises a radial expansion portion and an axial contraction portion located below the radial expansion portion, and the pan head is provided with an inlet for the expansion nail to penetrate into the expansion sleeve;
[0006] The outer circumference of the expansion nail is provided with a plurality of radially protruding expansion top rings, and the inner tube of the radial expansion portion can radially protrude due to the pressure of the expansion top rings. The lower outer circumference of the expansion nail is also provided with an external thread, and the expansion sleeve is also provided with an extrusion portion below the axial contraction portion, and the inner tube of the extrusion portion is provided with an internal thread. The outer diameter of the nail head of the expansion nail is larger than the inner diameter of the entrance, and the length of the expansion nail is shorter than the length of the expansion sleeve. Therefore, when the external thread of the expansion nail rotates at the internal thread of the extrusion portion, the extrusion portion can be pulled upward to compress the axial contraction portion to axially contract, so that the axial contraction portion bulges outward to form a locking knot.
[0007] The above-mentioned twist-lock expansion anchor assembly of the present application is provided with a radial expansion part. After the expansion nail is inserted, the radial expansion part is pressed and expanded, and then closely contacts the wall to form a strong resistance. In addition, the lower part of the expansion body is an axial contraction part, which adopts a mechanical locking structure. When the external thread of the expansion nail is screwed into the internal thread, the extrusion part will be pulled by the expansion nail, and the axial contraction part will deform and expand to form a lock, thereby improving the pull-out bearing capacity of various types of walls.
[0008] In some embodiments, the outer wall of the radial expansion portion is provided with more than two expansion joints extending in parallel axial directions, and the expansion joints are communicated with the inner tube area of the radial expansion portion; the outer periphery of the axial contraction portion is provided with more than two deformation joints, each deformation joint extends from the upper end to the lower end of the axial contraction portion, and is arranged obliquely with respect to the axial direction of the axial contraction portion, and the deformation joints are arranged spirally and communicated with the inner tube area of the axial contraction portion. In order to facilitate the radial expansion of the radial expansion portion, the number of the expansion joints is two or more, and in some embodiments, the expansion joints can also be arranged obliquely. The deformation joints are arranged to facilitate the axial compression of the axial compression portion. Preferably, the expansion body is made of a certain material, and the expansion nail is made of a metal material.
[0009] In some embodiments, the number of the deformation joints is two, and they are respectively arranged at the front and rear sides of the axial contraction portion, and the inclination directions are opposite.
[0010] In some embodiments, a plurality of inverted truncated cone-shaped damping rings arranged axially at intervals are disposed on the outer periphery of the radial expansion portion, and an expansion locking ring protruding radially outward is disposed on the outer periphery of the axial contraction portion.
[0011] The purpose of providing the inverted truncated cone damping ring is to increase the friction with the wall, and the inverted truncated cone structure can effectively prevent the anchor bolt from shrinking. The expansion top ring is preferably also an inverted truncated cone structure.
[0012] In some embodiments, the expansion sleeve further includes a polished rod portion disposed above the radial expansion portion, the polished rod portion being fixed to the pan head. The polished rod portion is a portion in contact with the insulation board and can be configured as a polished rod structure, and the length of the polished rod portion can be changed accordingly according to the thickness of the insulation board.
[0013] In some embodiments, a rotation indicator line is also provided on the upper part of the expansion nail, and the rotation indicator line is mainly used to indicate when the extrusion part starts to move upward.
[0014] In some embodiments, the shape of the pan head is circular or square. It can also be triangular or any other shape. The square pan head is generally mainly used in the joints between insulation boards, while the circular pan head can be used for anchoring in other areas.
[0015] In some embodiments, the pan head is a hollow structure, and a reinforcing rib is provided on the back of the pan head. The hollow structure can reduce the amount of material used and thus reduce the cost, and the reinforcing rib is provided on the back to improve its physical strength.
[0016] In some embodiments, the disk head is further provided with one or more fixing pins, which are parallel to the expansion sleeve and protrude to the same side. The fixing pins are mainly used to connect adjacent insulation boards, connect the insulation boards together, improve the integrity of the insulation system, and reduce the risk of cracking, water seepage, and falling off of the system.
[0017] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:
[0018] (1) The present application adopts an expansion and twist lock structure, which has a certain improvement in the pull-out bearing capacity of various types of walls compared to ordinary expansion anchors, especially in hollow walls, because it can form a lock knot, which greatly improves the pull-out bearing capacity.
[0019] (2) Compared with ordinary expansion anchors, the present invention has greater tolerance for construction drilling and higher tolerance for ambient temperature.
[0020] (3) The present application adopts a connecting pin anchor plate design to connect the insulation panels together, thereby improving the integrity of the insulation system and reducing the risk of cracking, water seepage, and falling off of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the structure of an expansion body in one embodiment of the present application;
[0022] Figure 2 This is a schematic diagram of the structure of an expansion casing in one embodiment of the present application;
[0023] Figure 3 This is a schematic diagram of the internal structure of an expansion casing in one embodiment of the present application;
[0024] Figure 4 This is a schematic diagram of the structure of an expansion nail in an embodiment of the present application;
[0025] Figure 5 This is a schematic diagram of the structure of an expansion body in another embodiment of the present application;
[0026] Figure 6 This is a schematic diagram of the usage status of the embodiment of the present application. Figure 1 ;
[0027] Figure 7 This is a schematic diagram of the usage status of the embodiment of the present application. Figure 2 .
[0028] Explanation of the reference numerals: 1. Expansion nail; 11. Expansion top ring; 12. External thread; 13. Rotation indicator line; 14. Nail head; 2. Pan head; 21. Entrance; 22. Hollow hole; 23. Strengthening back rib; 3. Expansion sleeve; 31. Radial expansion part; 311. Expansion joint; 312. Inverted truncated cone damping ring; 32. Axial contraction part; 321. Deformation joint; 322. Expansion locking ring; 33. Extrusion part; 331. Internal thread; 34. Bare rod; 4. Fixing pin; 5. Insulation board; 51. Joint; 6. Adhesive mortar; 7. Wall; DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The terms used in the implementation method of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.
[0030] See also Figures 1 to 7 The embodiment of the present application provides a twist-lock expansion anchor assembly, comprising an expansion body and an expansion nail 1, wherein the expansion body comprises a pan head 2 and an expansion sleeve 3 fixedly arranged with the pan head 2, wherein the expansion sleeve 3 comprises a radial expansion portion 31 and an axial contraction portion 32 located below the radial expansion portion 31, and an inlet 21 for the expansion nail 1 to penetrate into the expansion sleeve 3 is provided on the pan head 2;
[0031] The outer periphery of the expansion nail 1 is provided with a plurality of radially protruding expansion top rings 11, and the inner tube of the radial expansion portion 31 can be radially protruded due to the pressure of the expansion top ring 11. The lower outer periphery of the expansion nail 1 is also provided with an external thread 12, and the expansion sleeve 3 is also provided with an extrusion portion 33 at a position below the axial contraction portion 32, and the inner tube of the extrusion portion 33 is provided with an internal thread 331. The outer diameter of the nail head 14 of the expansion nail 1 is larger than the inner diameter of the inlet 21, and the length of the expansion nail 1 is shorter than the length of the expansion sleeve 3, so that when the external thread 12 of the expansion nail 1 rotates at the internal thread 331 of the extrusion portion 33, the extrusion portion 33 can be pulled upward to compress the axial contraction portion 32 to contract axially, so that the axial contraction portion 32 bulges outward to form a locking knot.
[0032] The twist-lock expansion anchor assembly is provided with a radial expansion portion 31. After the expansion nail 1 is inserted, the radial expansion portion 31 is pressed and expanded to closely contact the wall 7 to form a strong resistance. In addition, the lower part of the expansion body is an axial contraction portion 32, which adopts a mechanical locking structure. When the external thread 12 of the expansion nail 1 is screwed into the internal thread 331, the extrusion portion 33 will be pulled by the expansion nail 1, and the axial contraction portion 32 will deform and expand to form a lock, thereby improving the pull-out bearing capacity of various types of walls 7.
[0033] In some embodiments, the outer wall of the radial expansion portion 31 is provided with more than two expansion joints 311 extending in parallel axial directions, and the expansion joints 311 are communicated with the inner tube area of the radial expansion portion 31; the outer periphery of the axial contraction portion 32 is provided with more than two deformation joints 321, each deformation joint 321 extends from the upper end to the lower end of the axial contraction portion 32, and is arranged obliquely with respect to the axial direction of the axial contraction portion 32, and the deformation joints 321 are arranged spirally and communicated with the inner tube area of the axial contraction portion 32. In order to facilitate the radial expansion of the radial expansion portion 31, the number of the expansion joints 311 is two or more, and in some embodiments, the expansion joints 311 can also be arranged obliquely. The deformation joints 321 are arranged to facilitate the axial compression of the axial compression portion. It is preferred that the expansion body is made of a certain material, and the expansion nail 1 is made of a metal material.
[0034] In some embodiments, the number of the deformation seams 321 is two, and they are respectively disposed at the front and rear sides of the axial contraction portion 32 and have opposite inclination directions.
[0035] In some embodiments, a plurality of inverted truncated cone-shaped damping rings 312 are disposed at intervals in the axial direction on the outer periphery of the radial expansion portion 31 , and an expansion locking ring 322 protruding radially outward is disposed at the outer periphery of the axial contraction portion 32 .
[0036] The purpose of providing the inverted truncated cone damping ring 312 is to increase the friction with the wall 7. The inverted truncated cone structure can effectively prevent the anchor bolt from shrinking. Preferably, the expansion top ring 11 is also in the shape of an inverted truncated cone.
[0037] In some embodiments, the expansion sleeve 3 further includes a polished rod portion 34 disposed above the radial expansion portion 31, and the polished rod portion 34 is fixed to the pan head 2. The polished rod portion 34 is a portion in contact with the insulation board 5, and can be set as a polished rod structure, and the length of the polished rod portion 34 can be changed accordingly according to the thickness of the insulation board 5.
[0038] In some embodiments, a rotation indicator line 13 is further provided on the upper portion of the expansion nail 1. The rotation indicator line 13 is mainly used to indicate when the extrusion portion 33 starts to move upward.
[0039] In some embodiments, see Figure 1 and Figure 5 The shape of the pan head 2 is circular or square. It can also be triangular or any other shape. The square pan head 2 is generally mainly used for the joint 51 between the insulation boards 5, while the circular pan head 2 can be used for anchoring in other areas.
[0040] In some embodiments, the pan head 2 is a hollow structure, that is, a plurality of hollow holes 22 are provided on the pan body, and a reinforcing back rib 23 is provided on the back of the pan head 2. The hollow structure can mainly reduce the amount of material used and thus reduce the cost, and the reinforcing rib is provided on the back to improve its physical strength.
[0041] In some embodiments, the pan head 2 is further provided with one or more fixing pins 4, which are parallel to the expansion sleeve 3 and protrude to the same side. The fixing pins 4 are mainly used to connect adjacent insulation boards 5, connecting the insulation boards 5 together, improving the integrity of the insulation system, and reducing the risk of cracking, water seepage, and falling off of the system.
[0042] The following briefly describes the working process and usage of the above-mentioned twist-lock expansion anchor assembly:
[0043] The expansion body of the rotary lock expansion anchor assembly mainly has two types of disc heads 2: square and round. The square disc head 2 is mainly used at the joints 51 of the insulation board 5. The square disc head 2 can block the joints to avoid exposure of the joints. A fixing pin 4 is also provided on the disc head 2, which is mainly used to connect two adjacent insulation boards 5 together to form a whole. The round expansion body can be used in other areas.
[0044] In the insulation system, the insulation board 5 is bonded to the wall 7 by bonding mortar 6 and anchored by anchor bolts. When the twist-lock expansion anchor assembly is used, it is necessary to drill a hole first, insert the expansion body into the hole, and screw the expansion nail 1 into the expansion body. The twist-lock expansion connection anchor bolt is better tightly combined with the hole in the wall 7. Figure 7 , and even form a lock knot in the hollow wall 7, firmly grasping the hole wall, and performing more outstandingly in weather resistance.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A twist-lock expansion anchor assembly, characterized in that: It comprises an expansion body and an expansion nail, wherein the expansion body comprises a pan head and an expansion sleeve fixedly arranged with the pan head, the expansion sleeve comprises a radial expansion portion and an axial contraction portion located below the radial expansion portion, and the pan head is provided with an inlet for the expansion nail to penetrate into the expansion sleeve; The outer circumference of the expansion nail is provided with a plurality of radially protruding expansion top rings, and the inner tube of the radial expansion portion can radially protrude due to the pressure of the expansion top rings. The lower outer circumference of the expansion nail is also provided with an external thread, and the expansion sleeve is also provided with an extrusion portion below the axial contraction portion, and the inner tube of the extrusion portion is provided with an internal thread. The outer diameter of the nail head of the expansion nail is larger than the inner diameter of the entrance, and the length of the expansion nail is shorter than the length of the expansion sleeve. Therefore, when the external thread of the expansion nail rotates at the internal thread of the extrusion portion, the extrusion portion can be pulled upward to compress the axial contraction portion to axially contract, so that the axial contraction portion bulges outward to form a locking knot.
2. A twist-lock expansion anchor assembly according to claim 1, characterized in that: The outer wall of the radial expansion portion is provided with more than two expansion seams extending in a parallel axial direction, and the expansion seams are communicated with the inner tube area of the radial expansion portion; the outer periphery of the axial contraction portion is provided with more than two deformation seams, each deformation seam extends from the upper end to the lower end of the axial contraction portion, and is arranged obliquely with the axial direction of the axial contraction portion, and the deformation seams are arranged spirally and communicated with the inner tube area of the axial contraction portion.
3. A twist-lock expansion anchor assembly according to claim 2, characterized in that: The number of the deformation joints is two, and they are respectively arranged at the front and rear sides of the axial contraction portion, and the inclination directions are opposite.
4. The twist-lock expansion anchor assembly according to claim 1, characterized in that: The outer periphery of the radial expansion portion is provided with a plurality of inverted truncated cone-shaped damping rings arranged axially at intervals, and the outer periphery of the axial contraction portion is provided with an expansion locking ring protruding radially outward.
5. The twist-lock expansion anchor assembly according to claim 1, characterized in that: The expansion sleeve also includes a polished rod portion arranged above the radial expansion portion, and the polished rod portion is fixed to the pan head.
6. A twist-lock expansion anchor assembly according to claim 5, characterized in that: A rotation indicator line is also arranged on the upper part of the expansion nail.
7. The twist-lock expansion anchor assembly according to claim 1, characterized in that: The shape of the pan head is round or square.
8. The twist-lock expansion anchor assembly according to claim 7, characterized in that: The pan head is a hollow structure, and a reinforcing back rib is arranged on the back of the pan head.
9. The twist-lock expansion anchor assembly according to claim 7, characterized in that: The disk head is also provided with more than one fixing pin, and the fixing pin is parallel to the expansion sleeve and protrudes and extends toward the same side.