CN207261407U - A kind of multi-functional crab-bolt - Google Patents

Abstract

The utility model discloses a multifunctional anchor bolt, which comprises a self-tapping screw and a flexible sleeve assembly set on the self-tapping screw. The flexible sleeve assembly has a head sleeve, a middle sleeve and a tail sleeve. A self-tapping thread is formed on the inner wall of the barrel, and a plurality of scale-like barbs protruding outward are formed on the outer wall of the middle sleeve. The self-tapping screw has an external thread that matches the self-tapping thread of the tail sleeve. When the self-tapping screw is inserted into the flexible sleeve assembly and rotates, it can drive the flexible sleeve assembly to be screwed back and contracted. During the process of screwing back and shrinking, the middle sleeve moves and deforms and squeezes the mounting hole to complete the anchoring. The multi-functional anchor bolt of the utility model is composed of high-strength nylon sleeve and stainless steel self-tapping bolt. The anchor bolt composed of two materials of nylon and stainless steel has strong shock resistance, acid and alkali resistance, corrosion resistance, high strength, good toughness, and wide application range. wide features.

Description

A multifunctional anchor bolt

technical field

The utility model belongs to the technical field of anchor bolts, in particular to a multifunctional anchor bolt.

Background technique

Expansion bolts are a special threaded connection used to fix accessories or equipment on walls, floors, and columns. Expansion bolts are usually composed of countersunk head bolts, expansion tubes, flat washers, spring washers and hexagon nuts. Existing expansion bolts are divided into ordinary expansion bolts, internally forced geckos and externally forced geckos, etc., which are suitable for hard substrates such as concrete and natural hard stone.

Existing expansion bolts mostly adopt two expansion methods of implosion and pull explosion. As the name suggests, implosion means that a small steel column is installed inside the bolt, and the tail sleeve has an inner thread. After being nailed into the wall hole, it is screwed in through a screw rod. Then the small steel column is constantly squeezed, and the head sleeve splits to generate friction with the wall hole to fix it. The difference between the detonation expansion method and the implosion method is only that the small steel column is extruded from the outside to cause a burst. From a mechanical point of view, the strength of the detonation expansion method bolts is not as high as that of the implosion method bolts.

However, there are still many shortcomings in the existing expansion bolts. First, the existing metal expansion bolts use the relative movement between the vertebral body and the metal sleeve to promote the expansion of the metal sleeve, thereby generating frictional extrusion force with the concrete hole wall, and The anchor bolts of the fixed parts are realized through shear friction. The disadvantage of this method is that the tensile value is small and the shock resistance is poor; secondly, the existing metal expansion bolts use metal sleeves, and the wall thickness of the metal sleeves is relatively thin. After expansion, a large area of friction occurs with the base material, and there is water vapor in the base material, which produces acidic or alkaline substances, which makes the metal sleeve easy to rust and has poor corrosion resistance; finally, the existing metal expansion bolts are suitable for concrete, natural hard On hard substrates such as natural stone, hollow or soft substrates cannot be anchored, so only specific hard substrates can be anchored.

Utility model content

In order to solve the above-mentioned problems in the prior art, the utility model provides a multifunctional anchor bolt to improve the shock resistance and corrosion resistance of the anchor bolt.

In order to achieve the above object, the technical scheme of the multifunctional anchor bolt of the present utility model is as follows:

A multifunctional anchor bolt includes self-tapping screws and a flexible sleeve assembly sleeved on the self-tapping screws. The flexible sleeve assembly has a head sleeve, a middle sleeve and a tail sleeve. Self-tapping threads are formed, and a plurality of scale-shaped barbs protruding outward are formed on the outer wall of the middle sleeve. The self-tapping screw has an external thread that matches the self-tapping thread of the tail sleeve. The self-tapping screw is inserted into the flexible When the sleeve assembly is rotated, the flexible sleeve assembly can be driven to twist back and shrink, and the middle sleeve moves and deforms during the back-tightening and shrinking process and squeezes the installation hole to complete the anchoring.

Further, the scaly barb protrudes outward along the direction facing the head sleeve of the flexible sleeve assembly.

Further, the plurality of scale-shaped barbs on the outer wall of the middle sleeve are arranged in a row, and at least one row is included.

Further, multiple rows of scale-like barbs are provided on the outer wall of the middle sleeve, and the rows of scale-like barbs are distributed symmetrically about the central axis of the middle sleeve.

Further, the middle sleeve includes a plurality of connecting pieces arranged at intervals, and the two ends of each connecting piece are respectively connected with the head sleeve and the tail sleeve, and gaps are formed between adjacent connecting pieces to enhance the deformation capacity of the middle sleeve , each connecting piece is provided with rows of scale-like barbs.

Further, the flexible sleeve assembly is made of high-strength nylon, and the self-tapping screws are made of stainless steel.

Further, the diameters of the head sleeve, the middle sleeve and the tail sleeve of the flexible sleeve assembly are successively reduced.

Further, the head sleeve of the flexible sleeve assembly is a polygonal cylinder, and a circular through hole for self-tapping screws is formed inside the head sleeve, and a thickened corner is formed at the sharp corner of the polygonal head sleeve. rib.

Further, the head sleeve is a square cylinder, and a blocking flange is formed at the end of the head sleeve, and the diameter of the blocking flange is larger than that of the head sleeve.

Further, the self-tapping screw includes a head and a tail, the head of the self-tapping screw is a hexagonal flange, and the tail of the self-tapping screw has an external thread.

The multifunctional anchor bolt of the utility model is composed of a high-strength nylon sleeve and a stainless steel self-tapping bolt. The anchor bolt composed of nylon and stainless steel has strong shock resistance, acid and alkali resistance, corrosion resistance, high strength, good toughness, and wide application range. wide features. The advantages of multi-functional anchor bolts are as follows:

1) Strong shock resistance, the multi-functional anchor bolt adopts the self-tapping back-tightening anchoring method, which makes the high-strength nylon casing back-tighten and expand to generate friction and extrusion force on the hole wall. Because nylon has high flexibility, it will not cause damage to the hole wall. destruction, so strong shock resistance;

2) Strong corrosion resistance. The multi-functional anchor bolts are combined with stainless steel self-tapping bolts and high-strength nylon sleeves. Both stainless steel and high-strength nylon have strong acid resistance, alkali resistance and corrosion resistance;

3) It has a wide range of applications. Due to the strong flexibility of high-strength nylon, the multi-functional anchor bolt can exert different performances according to the texture of the substrate. For example, when anchored on concrete and natural hard stone, it will produce an expansion effect; The reaming and twisting effect will occur on the air concrete; the twisting and knotting effect will occur when anchored on the hollow brick, and the multifunctional anchor bolt has strong practicability.

Description of drawings

Fig. 1 is the structural representation of multifunctional anchor bolt of the present utility model;

Fig. 2 shows the flexible sleeve assembly in the multifunctional anchor bolt;

Figure 3 shows a self-tapping screw in a multipurpose anchor.

Detailed ways

In order to better understand the purpose, structure and function of the utility model, the multifunctional anchor bolt of the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the multifunctional anchor bolt of the present invention includes a self-tapping screw 10 and a flexible casing assembly 20, the flexible casing assembly 20 is set on the outer surface of the self-tapping screw 10, and the flexible casing assembly 20 adopts a high-strength 1. Made of materials with good flexibility, such as high-strength nylon, etc., the self-tapping screw 10 is preferably made of stainless steel. When in use, the flexible sleeve assembly 20 is first installed in the mounting hole of the site to be anchored, then the self-tapping screw 10 is inserted into the flexible sleeve assembly 20, the self-tapping screw 10 is rotated and the flexible sleeve assembly 20 is driven to be screwed back, thereby Anchor the object.

As shown in Figure 2, in the multifunctional anchor bolt, the flexible sleeve assembly 20 has a head sleeve 21, a middle sleeve 22 and a tail sleeve 24, the head sleeve 21, the middle sleeve of the flexible sleeve assembly 20 22 and the diameter of the tail sleeve 24 are successively reduced. The head sleeve 21 of the flexible sleeve assembly 20 is polygonal, such as a square, and a circular through hole is formed in the square head sleeve 21. One end of the square head sleeve 21 is formed with a blocking flange, and the blocking flange The diameter of the head sleeve 21 is greater than the diameter of the rest of the head sleeve. The head sleeve 21 of the flexible sleeve assembly 20 is a cylinder with an inner circle and an outer square. The sharp corners of the head sleeve 21 form thickened ribs. The flexible sleeve The circular through hole of the head sleeve 21 of the assembly 20 can pass through the self-tapping screw 10 , and the square outer wall of the head sleeve 21 can prevent the flexible sleeve assembly 20 entering the installation hole from being deformed and rotated.

The middle sleeve 22 of the flexible sleeve assembly 20 is in the shape of a cylinder, such as a cylinder or a square cylinder. The outer surface of the middle sleeve 22 of the flexible sleeve assembly 20 is provided with a plurality of scale-like barbs 23 protruding outward. , a plurality of scale-like barbs 23 are arranged in a row, the scale-like barbs 23 protrude outward along the direction of the head sleeve 21 of the flexible sleeve assembly 20, and the scale-like barbs 23 have good flexibility and elasticity. Preferably, the middle sleeve 22 of the flexible sleeve assembly 20 includes a plurality of connecting pieces, for example 4 pieces, the middle sleeve 22 of the plurality of connecting pieces is formed with gaps to enhance the deformation ability of the middle sleeve 22, and the rows of scales are respectively Set on the connecting piece. After the flexible sleeve assembly 20 enters the installation hole, insert and rotate the self-tapping screw 10, the scaly barb 23 of the middle sleeve 22 of the flexible sleeve assembly 20 can move and deform to complete reaming and knotting in the installation hole , The scale-like barbs 23 firmly penetrate into the surface of the substrate, thereby forming a reliable anchor.

The tail sleeve 24 of the flexible sleeve assembly 20 is a thickened circular bushing, the inner wall of the bushing is formed with self-tapping threads, and the self-tapping threads on the inner wall of the bushing can be matched with the threads on the self-tapping screw 10, inserted and rotated The self-tapping screw 10 drives the flexible sleeve assembly 20 to self-tapping and backscrew through the cooperation of the self-tapping thread on the inner wall of the sleeve and the thread on the self-tapping screw 10, thereby anchoring the object.

As shown in FIG. 3 , the head of the self-tapping screw 10 is a hexagonal flange, and the hexagonal flange can ensure that the self-tapping screw 10 will not be loosened or buckled when fastened. The tail of the self-tapping screw 10 has an external thread (that is, a self-tapping thread), and the self-tapping screw 10 is inserted into the flexible sleeve assembly 20 and then rotated to achieve self-tapping and back-tightening effects.

The multi-functional anchor bolt of the present utility model adopts a flexible sleeve assembly 20 made of high-strength nylon and a self-tapping screw 10 made of corrosion-resistant metal material, and both the flexible sleeve assembly 20 and the self-tapping screw 10 have acid and alkali resistance and corrosion resistance. , high strength, the flexible sleeve assembly 20 has good toughness, is suitable for substrates of various textures, and has a wide range of applications.

It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalents can be made to these features and embodiments without departing from the spirit and scope of the utility model replace. In addition, the features and embodiments may be modified to adapt a particular situation and material to the teachings of the invention without departing from the spirit and scope of the invention. Therefore, the present utility model is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present utility model.

Claims (10)

1. a kind of multi-functional crab-bolt, including self-tapping screw and the flexible sleeve component that is nested with self-tapping screw, it is characterised in that Flexible sleeve component has head skirt, middle part sleeve and a rear sleeve, formed with tapping screw thread on the madial wall of rear sleeve, Flakey barb formed with multiple outwardly convexs on the lateral wall of middle part sleeve, have on self-tapping screw with rear sleeve from The external screw thread that tapping coordinates, self-tapping screw, which is inserted into when being rotated in flexible sleeve component, can drive flexible sleeve component to return stubborn receive Contracting, middle part sleeve, which is returned in stubborn contraction process, to be moved deformation and extrudes mounting hole to complete to anchor.

2. multi-functional crab-bolt according to claim 1, it is characterised in that flakey barb is along towards flexible sleeve component head The direction of portion's sleeve is outwardly protruding.

3. multi-functional crab-bolt according to claim 1, it is characterised in that multiple flakeys on the sleeve lateral wall of middle part are fallen Hook is set in a row, and includes at least a row.

4. multi-functional crab-bolt according to claim 3, it is characterised in that be provided with multiple rows of scale on the sleeve lateral wall of middle part Shape barb, multiple rows of flakey barb are symmetrical on the central axis of middle part sleeve.

5. the multi-functional crab-bolt according to Claims 2 or 3, it is characterised in that middle part sleeve includes multiple spaced Connection sheet, the both ends of each connection sheet are connected with head skirt and rear sleeve respectively, and gap is formed between adjacent connection sheet With the deformability of enhancing middle part sleeve, rows of flakey barb is provided with each connection sheet.

6. multi-functional crab-bolt according to claim 1, it is characterised in that flexible sleeve component is made of high-strength nylon, Self-tapping screw is made of stainless steel.

7. multi-functional crab-bolt according to claim 1, it is characterised in that the head skirt of flexible sleeve component, middle part set The diameter of cylinder and rear sleeve is sequentially reduced.

8. multi-functional crab-bolt according to claim 1, it is characterised in that the head skirt of flexible sleeve component is polygon Cylinder, head skirt are internally formed the circular through hole passed through for self-tapping screw, the sharp corner of the head skirt of polygon Formed and thicken rib.

9. multi-functional crab-bolt according to claim 8, it is characterised in that head skirt is square cylinder, head skirt Formed with stop flange, the diameter of stop flange is more than the diameter of head skirt for end.

10. multi-functional crab-bolt according to claim 1, it is characterised in that self-tapping screw includes head and afterbody, self tapping spiral shell The head of silk is hexagonal flange disk, and the afterbody of self-tapping screw has external screw thread.