A fixing element

Abstract

The application discloses a fixing element, comprising: a taper connecting piece, the taper connecting piece at least comprising a taper connecting piece head and a threaded part; an expansion sleeve, the expansion sleeve being sleeved on the taper connecting piece, and an expansion ring being integrally connected to the expansion sleeve; wherein the expansion sleeve is provided with a split opening along an axial direction of the expansion sleeve, so that the expansion sleeve is in a side-opened cylindrical structure, a first edge and a second edge are formed at the split opening, the first edge is provided with a limiting protrusion, the second edge is provided with a limiting groove, the limiting protrusion is matched with the limiting groove, so that the limiting protrusion is limited in the inside of the limiting groove; and a sleeve protruding part is formed by outwardly bulging a middle part of the expansion sleeve along a radial direction of the expansion sleeve. The application adopts an integral expansion sleeve and expansion ring, saves materials, and reduces cost.

Description

Technical Field

[0001] This invention relates to the technical field of fasteners, and more particularly to a fixing element. Background Technology

[0002] With the development of society and economy and the improvement of people's quality of life, higher requirements have been put forward for the quality of living environment, which has promoted the development of curtain wall decoration industry. Stone, ceramic slabs and terracotta panels have been widely used in curtain walls. People have also put forward higher requirements for the safety performance and construction technology of curtain walls. Fixing elements are commonly used in the construction of stone curtain walls for building exteriors.

[0003] Patent CN204401835U discloses a screw-type fixing element connected by stone. It belongs to the screw-in fixing element and includes an independent screw-type sleeve and a diffuser ring. It needs to be manufactured separately, which is costly and makes it difficult to ensure the vertical positioning of the screw. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a fixing element.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A fixing element, which can be anchored in an undercut borehole, comprising:

[0007] A tapered connector, the tapered connector comprising at least a tapered connector head and a threaded portion;

[0008] An expansion sleeve is fitted onto the tapered connector;

[0009] The expansion sleeve bulges outward along its radial direction to form a sleeve protrusion.

[0010] Alternatively, a fixing element capable of being anchored in an undercut borehole, comprising:

[0011] A tapered connector, the tapered connector comprising at least a tapered connector head and a threaded portion;

[0012] An expansion sleeve is fitted onto the tapered connector, and a diffuser ring is integrally connected to the expansion sleeve.

[0013] The tapered connector is a tapered bolt, a tapered screw, and / or a tapered rivet.

[0014] The expansion sleeve has a slit along its axial direction to make the expansion sleeve a cylindrical structure with open sides. A first edge and a second edge are formed at the slit. The first edge has a limiting protrusion and the second edge has a limiting groove. The limiting protrusion matches the limiting groove so that the limiting protrusion is limited to the inside of the limiting groove.

[0015] The expansion sleeve has a central portion that bulges outward along its radial direction to form a sleeve protrusion.

[0016] The aforementioned fixing element, wherein the diffuser ring comprises: a plurality of diffuser structures extending outward from one end of the expansion sleeve near the head of the bolt, the plurality of diffuser structures forming a ring.

[0017] In the aforementioned fixing element, each pair of adjacent diffusion structures has a groove on the side near the bolt head so that the plurality of diffusion structures can unfold into a petal shape due to the pressure provided by the bolt head.

[0018] In the aforementioned fixing element, each of the diffusion structures has a through hole along its thickness direction.

[0019] In the aforementioned fixing element, the hole is a trapezoidal hole, with the short side of the trapezoidal hole located close to the bolt head and the long side of the trapezoidal hole located away from the bolt head.

[0020] In the aforementioned fixing element, each of the aforementioned diffusion structures protrudes outward to form a diffusion protrusion.

[0021] In the aforementioned fixing element, the hole is a trapezoidal hole, and the expansion protrusion is located at the short side of the trapezoidal hole.

[0022] In the aforementioned fixing element, one side of the bolt head protrudes outward to form a bolt protrusion.

[0023] In the aforementioned fixing element, the inner wall of the expansion sleeve on the side away from the bolt head is provided with an inwardly recessed engagement point.

[0024] In the aforementioned fixing element, both the limiting protrusion and the limiting groove are located at the sleeve protrusion.

[0025] In the aforementioned fixing element, the sleeve protrusion has a generally flat platform at its center.

[0026] In the aforementioned fixing element, the distance between the surface of the platform and the surface of the non-bulging portion of the expansion sleeve is half the thickness of the expansion sleeve.

[0027] In the aforementioned fixing element, the platform forms a cavity on the side facing the tapered connector.

[0028] In the aforementioned fixing element, the axial length of the sleeve protrusion is less than the axial length of the expansion sleeve.

[0029] The axial length of the sleeve protrusion is one-third to one-half of the axial length of the expansion sleeve.

[0030] In the aforementioned fixing element, the thickness at the end of the expansion sleeve is the same as the thickness at the protruding part of the sleeve.

[0031] The aforementioned fixing elements, wherein,

[0032] In the aforementioned fixing element, the sleeve protrusion extends in the circumferential direction surrounding the tapered connector.

[0033] Specifically, in the aforementioned fixing element, the sleeve protrusion extends along the entire circumference of the tapered connector.

[0034] The present invention, by employing the above-mentioned technology, has the following positive effects compared with the prior art:

[0035] (1) This invention uses an integrated sleeve and diffuser ring, which saves materials and reduces costs. The sleeve of this invention can fully fill the gaps in the holes, ensuring the vertical positioning of the screw. The nested structure of this invention can effectively prevent the gaps from widening during installation, thereby making the force distribution more uniform.

[0036] (2) The diffusion protrusions on the diffusion ring of the present invention can increase the friction with the plate.

[0037] (3) The trapezoidal hole of the present invention makes installation easier and the screw-in point can prevent the parts from coming off or falling apart during transportation.

[0038] (4) The recessed design of the upper end of the sleeve of the present invention can effectively reduce the shear stress at the edge of the stone hole, thereby reducing the risk of the slab breaking and falling, and avoiding personal injury and property damage. In addition, the cavity structure of the sleeve can also buffer the impact of the load. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the tapered bolt of the fixing element of the present invention.

[0040] Figure 2 This is a cross-sectional schematic diagram of the tapered bolt of the fixing element of the present invention.

[0041] Figure 3 This is a schematic diagram of the fixing element of the present invention.

[0042] Figure 4 This is a schematic diagram of the sleeve of the fixing element of the present invention.

[0043] Figure 5 It is the fixing element of the present invention Figure 4 A magnified view of a portion of point A.

[0044] Figure 6 This is a schematic diagram of the sleeve of the fixing element of the present invention.

[0045] Figure 7 This is a side view of the sleeve of the fixing element of the present invention.

[0046] Figure 8 This is a schematic diagram of the installation of the fixing element of the present invention.

[0047] In the attached diagram: 1. Tapered bolt; 11. Bolt head; 111. Bolt protrusion; 12. Threaded portion; 2. Expansion sleeve; 21. Cutout; 211. First edge; 212. Second edge; 213. Limiting protrusion; 214. Limiting groove; 22. Sleeve protrusion; 221. Platform; 23. Engagement point; 3. Diffusion ring; 31. Diffusion structure; 311. Groove; 312. Hole; 313. Diffusion protrusion. Detailed Implementation

[0048] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] It should be noted that the terms "horizontal" and "vertical" in this invention are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0051] Please see Figures 1 to 8As shown, a preferred embodiment of a fixing element is shown, which is anchored in an undercut borehole. It is preferably a back bolt, comprising: a tapered bolt 1 and an expansion sleeve 2. The tapered bolt 1 includes at least a tapered bolt head 11 and a threaded portion 12; the expansion sleeve 2 is fitted onto the tapered bolt 1.

[0052] Furthermore, in this embodiment, the expansion sleeve 2 of the back bolt bulges outward in its radial direction to form a sleeve protrusion 22. The sleeve protrusion 22 can fully fill the gap in the hole, ensuring the vertical positioning of the screw.

[0053] Preferably, the expansion sleeve 2 is integrally connected with the diffuser ring 3.

[0054] Preferably, the tapered bolt 1 may further include a straight portion 13 located between the bolt head 11 and the threaded portion 12.

[0055] It is important to note that although this embodiment only describes this type of fastener in terms of bolt spacing, fasteners similar to bolts, such as screws and rivets, are also within the scope of protection of this invention.

[0056] Furthermore, in a preferred embodiment, the expansion sleeve 2 has a slit 21 along its axial direction to make the expansion sleeve 2 have a cylindrical structure with open sides. A first edge 211 and a second edge 212 are formed at the slit 21. The first edge 211 is provided with a limiting protrusion 213, and the second edge 212 is provided with a limiting groove 214. The limiting protrusion 213 matches the limiting groove 214 so that the limiting protrusion 213 is limited to the inside of the limiting groove 214.

[0057] Specifically, both the limiting protrusion 213 and the limiting groove 214 are fishtail shaped. The nested fishtail knot can effectively prevent the gap from widening during installation, thereby making the force more even.

[0058] More specifically, the limiting protrusion 213 preferably has two beveled or arc-shaped edges, such that the size of the side of the limiting protrusion 213 away from the first edge 211 is larger than the size of the side of the limiting protrusion 213 close to the first edge 211, so that the limiting protrusion 213 can be engaged in the limiting groove 214.

[0059] The shape of the limiting protrusion 213 can be arbitrary, as long as it can limit the displacement along the outer periphery of the sleeve 2 and prevent it from dislodging from the limiting groove 214.

[0060] Preferably, the expansion sleeve 2 and the diffuser ring 3 are integrally formed from a 1.5mm thick stainless steel plate. It should be noted that "integral" here refers to the expansion sleeve 2 and the diffuser ring 3 being connected as a single unit through various means. As a further, more specific, and preferred embodiment, "integral" can also mean that the expansion sleeve 2 and the diffuser ring are integrally formed during the manufacturing process, rather than being subsequently fixed together through various connection methods.

[0061] Preferably, the expansion sleeve 2 and the diffuser ring 3 are formed by integral stamping of sheet metal. More preferably, the limiting protrusion 213, the limiting groove 214, the sleeve protrusion 22, the groove 311, the hole 312, and the diffuser protrusion 313 are all formed by stamping of the sheet metal.

[0062] Furthermore, in a preferred embodiment, the middle portion of the expansion sleeve 2 bulges outward along its radial direction to form a sleeve protrusion 22. The expansion sleeve 2 with the sleeve protrusion 22 can fully fill the gap in the hole, ensuring the vertical positioning of the screw.

[0063] The upper end of the expansion sleeve 2 is designed to be recessed, which can effectively reduce the effect of shear stress on the edge of the hole in the plate.

[0064] Furthermore, as a preferred embodiment, the diffuser ring 3 includes a plurality of diffuser structures 31 extending outward from one end of the expansion sleeve 2 near the bolt head 11, the plurality of diffuser structures 31 enclosing each other to form a ring.

[0065] Furthermore, as a preferred embodiment, each pair of adjacent diffuser structures 31 is provided with a groove 311 on the side near the bolt head 11 so that the plurality of diffuser structures 31 can unfold into a petal shape due to the pressure provided by the bolt head 11.

[0066] Furthermore, as a preferred embodiment, each diffuser structure 31 has a through hole 312 along its thickness direction.

[0067] Furthermore, as a preferred embodiment, hole 312 is a trapezoidal hole, with the shorter side of the trapezoidal hole positioned close to the bolt head 11 and the longer side positioned away from the bolt head 11. The trapezoidal hole makes installation easier.

[0068] Furthermore, as a preferred embodiment, each diffusion structure 31 protrudes outward to form a diffusion protrusion 313, which can increase the friction with the plate.

[0069] Furthermore, as a preferred embodiment, the expansion protrusion 313 is located at the short side of the trapezoidal hole.

[0070] Preferably, the thickness of the diffuser structure 31 on the side facing the bolt head 11 is greater than the thickness of the diffuser structure 31 on the side away from the bolt head 11.

[0071] Preferably, the height of the trapezoidal hole is greater than the depth of the groove 311. Specifically, the long base of the trapezoidal hole is located at... Figure 3 The upper side of the groove 311 shown in the figure.

[0072] Preferably, the outer edge of the diffuser structure 31 is curved, especially Figure 6The outer edge of the lower end of the diffuser structure 31 is shown.

[0073] It should be noted that the above features, especially those relating to the diffuser structure 31, the hole 312, and the diffuser protrusion 313, can be selected as one of the features in some embodiments or combined with each other in other embodiments.

[0074] Furthermore, as a preferred embodiment, one side of the bolt head 11 protrudes outward to form a bolt protrusion 111. The bolt protrusion 111 facilitates the application of torque during subsequent installation.

[0075] Furthermore, as a preferred embodiment, the inner wall of the expansion sleeve 2 on the side away from the bolt head 11 is provided with an inwardly recessed engagement point 23. The engagement point 23 can prevent the parts from coming apart or falling apart during transportation.

[0076] Furthermore, in a preferred embodiment, both the limiting protrusion 213 and the limiting groove 214 are located at the sleeve protrusion 22.

[0077] Furthermore, as a preferred embodiment, the sleeve protrusion 22 has a generally flat platform 221 formed at its center.

[0078] Furthermore, as a preferred embodiment, the distance between the surface of the platform 221 and the surface of the non-bulging part of the expansion sleeve 2 is half the thickness of the expansion sleeve 2.

[0079] Furthermore, as a preferred embodiment, the platform 221 forms a cavity on the side facing the tapered connector 1, which allows the platform 211 to deform under pressure and provides space for deformation.

[0080] Furthermore, in a preferred embodiment, the axial length of the sleeve protrusion 22 is less than the axial length of the expansion sleeve 2.

[0081] Furthermore, as a preferred embodiment, the axial length of the sleeve protrusion 22 is one-third to one-half of the axial length of the expansion sleeve 2.

[0082] Furthermore, in a preferred embodiment, the thickness at the end of the expansion sleeve 2 is the same as the thickness at the sleeve protrusion 22.

[0083] Furthermore, as a preferred embodiment, the sleeve protrusion 22 extends in the circumferential direction surrounding the tapered connector 1.

[0084] In other words, the sleeve protrusion 22 extends in the entire circumferential direction. Specifically, the sleeve protrusion 22 covers or substantially covers the entire circumferential direction of the expansion sleeve 2, especially when the expansion sleeve 2 is formed into a circle and the limiting protrusion 213 is inserted into the limiting groove 214, the sleeve protrusion 22 extends in the entire circumferential direction, and in particular, extends continuously.

[0085] Furthermore, it should be noted that the above-mentioned features of the present invention can be freely combined to form multiple embodiments.

[0086] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixing element, which can be anchored in an undercut borehole, characterized in that include: A tapered connector (1) comprising a tapered connector head (11) and a threaded portion (12); An expansion sleeve (2) is fitted onto the tapered connector (1); wherein the expansion sleeve (2) bulges outward along its radial direction to form a sleeve protrusion (22), the sleeve protrusion (22) can fully fill the gap of the hole to ensure the vertical positioning of the screw; a diffuser ring (3) is integrally connected to the expansion sleeve (2); The sleeve protrusion (22) extends in the circumferential direction surrounding the tapered connector (1); The sleeve protrusion (22) extends in the entire circumferential direction; The sleeve protrusion (22) has a generally flat platform (221) at its center; The platform (221) forms a cavity on the side facing the tapered connector (1); The end of the expansion sleeve (2) away from the diffuser ring (3) is recessed inward to form a narrow opening.

2. The fixing element according to claim 1, characterized in that, The expansion sleeve (2) has a slit (21) along its axial direction to make the expansion sleeve (2) a cylindrical structure with open sides. A first edge (211) and a second edge (212) are formed at the slit (21). The slit (21) is the contact area where the first edge (211) and the second edge (212) intersect. The first edge (211) is provided with a limiting protrusion (213), and the second edge (212) is provided with a limiting groove (214). The limiting protrusion (213) matches the limiting groove (214) so ​​that the limiting protrusion (213) is limited within the limiting groove (214).

3. The fixing element according to claim 2, characterized in that, The limiting protrusion (213) and the limiting groove (214) are both located at the sleeve protrusion (22).

4. The fixing element according to claim 1, characterized in that, The diffuser ring (3) includes a plurality of diffuser structures (31) extending outward from one end of the expansion sleeve (2) near the head (11) of the connector, and the plurality of diffuser structures (31) together form a ring; Each pair of adjacent diffuser structures (31) has a groove (311) on the side near the connector head (11), and each diffuser structure (31) expands outward in the radial direction due to the movement of the expansion sleeve (2) against the connector head (11); Each of the aforementioned diffuser structures (31) has a through hole (312) along its thickness direction.

5. The fixing element according to claim 4, characterized in that, The hole (312) is a trapezoidal hole, with the short side of the trapezoidal hole located close to the head (11) of the connector and the long side of the trapezoidal hole located away from the head (11) of the connector. Each of the aforementioned diffuser structures (31) protrudes outward to form a diffuser bump (313); The diffuser protrusion (313) is located on the short side of the trapezoidal hole.

6. The fixing element according to claim 1, characterized in that, One side of the connector head (11) protrudes outward to form a connector protrusion (111).

7. The fixing element according to claim 1, characterized in that, The expansion sleeve (2) has a recessed engagement point (23) on the inner wall of the side away from the head (11) of the connector.

8. The fixing element according to claim 1, characterized in that, The distance between the surface of the platform (221) and the surface of the non-bulging part of the expansion sleeve (2) is half the thickness of the expansion sleeve (2).

9. The fixing element according to claim 1, characterized in that, The axial length of the sleeve protrusion (22) is one-third to one-half of the axial length of the expansion sleeve (2).

10. The fixing element according to claim 1, characterized in that, The thickness at the end of the expansion sleeve (2) is the same as the thickness at the sleeve protrusion (22).

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