CN219159342U - An expansion anchor - Google Patents

Abstract

The utility model discloses an expansion anchor bolt, which comprises a screw rod, a limiting sleeve and an expansion pipe, wherein the expansion pipe is sleeved on the outer wall of the screw rod; the limiting sleeve is arranged at one end of the expansion pipe, and the limiting sleeve is movably connected with the expansion pipe; one end of the limiting sleeve is sleeved in the pipe cavity of the expansion pipe, and the other end of the limiting sleeve is provided with a truncated cone-shaped extrusion head; the inner wall of the limit sleeve is provided with an internal thread, and the screw rod is in threaded connection with the inner wall of the limit sleeve. According to the utility model, the screw is rotated to enable the screw to push the expansion pipe to move towards one end of the limit sleeve, so that the extrusion head at the tail end of the limit sleeve is contracted towards the inside of the expansion pipe, the extrusion head drives the four expansion sheets to expand outwards to extrude the wall, and the friction force between the expansion sheets and the wall can be increased by arranging the square frustum on each expansion sheet, so that the stability of an anchoring object is enhanced, the connection between the expansion anchor bolt and the wall is enhanced, and the pulling resistance of the expansion anchor bolt is improved.

Description

An expansion anchor

technical field

The utility model relates to the technical field of anchor bolt fasteners, in particular to an expansion anchor bolt.

Background technique

Expansion anchor is a common threaded fastener used to fix pipelines, brackets or equipment on fixed bodies such as walls, floors or columns. Currently, expansion anchors on the market are mainly composed of anchor bodies and sleeves. It consists of an expansion sleeve arranged on the anchor body. By twisting the anchor bolt body, the anchor bolt body squeezes the expansion sleeve, the expansion sleeve is squeezed and deformed, and the friction between the expansion part and the structure in the wall increases, so that the expansion bolt is anchored to the wall, so that the wall Form a support point for bearing objects; however, due to the structural constraints of the expansion sleeve, the existing expansion anchor bolts have limited friction between the expansion sleeve and the concrete, which eventually leads to the instability of the anchored object, and the pull-out performance after anchoring poor.

Contents of the invention

The purpose of this utility model is to provide an expansion anchor bolt to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

An expansion anchor bolt, comprising a screw rod, a limit sleeve and an expansion tube, wherein the expansion tube is sleeved on the outer wall of the screw rod; the limit sleeve is arranged at one end of the expansion tube, wherein the limit sleeve is movably connected with the expansion tube; One end of the limit sleeve is sleeved in the lumen of the expansion tube, and the other end of the limit sleeve is provided with a conical extrusion head; the inner wall of the limit sleeve is provided with internal threads, and the screw rod and the limit sleeve Inner wall threaded connection.

As a further solution of the present utility model: the expansion tube is provided with four movable holes equidistantly at one end close to the limit sleeve, and four through grooves are equidistantly opened along the axial direction around the expansion pipe, wherein each through groove is respectively connected with the movable The holes are connected.

As a further solution of the present invention: the outer wall of the limiting sleeve is respectively provided with protrusions corresponding to the four movable holes, wherein the protrusions are arranged in the movable holes, and the protrusions slide in the movable holes.

As a further solution of the utility model: a through hole is provided at the connecting end of the through groove and the expansion pipe, and the other end of the through groove extends to the end of the expansion pipe.

As a further solution of the present invention: the four through grooves divide the expansion tube into four expansion sheets at equal distances.

As a further solution of the present utility model: the ends of the expansion pieces are arc-shaped, and the expansion pieces respectively abut against the outer wall of the extrusion head.

As a further solution of the utility model: the outer wall of the expansion sheet is equidistantly provided with several upwardly protruding square cones, wherein the square cones and the expansion sheet are integrally formed.

Compared with the prior art, the utility model has the beneficial effects: the utility model connects the screw with the limit sleeve by turning the screw, so that the screw pushes the expansion tube to move to one end of the limit sleeve, and then the limit sleeve The extrusion head at the end shrinks into the expansion tube, and the extrusion head drives the four expansion sheets to generate outward expansion force, so that the four expansion sheets all squeeze the wall for anchoring with the wall, and pass through each expansion sheet Setting multiple square cones can increase the friction between the expansion sheet and the wall, enhance the stability of the anchored object, avoid the problem of rotation of the expansion anchor during the expansion and anchoring process, and make the expansion anchor and the wall more stable. The connection is strengthened, which increases the pullout resistance of the expansion anchor.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is a structural sectional view of A-A shown in Fig. 2;

Fig. 4 is a structural schematic diagram of the connection between the screw rod and the limit sleeve of the utility model;

Fig. 5 is a front view of the connection between the screw rod and the limit sleeve of the utility model;

Fig. 6 is the structural sectional view of B-B shown in Fig. 5;

Fig. 7 is a structural schematic diagram of the utility model expansion tube;

Fig. 8 is the front view of the utility model expansion tube;

Fig. 9 is a structural sectional view of C-C shown in Fig. 8;

Fig. 10 is a schematic diagram of the structure of the utility model connected with the wall.

Among them: 1. screw; 2. limit sleeve; 3. expansion tube; 4. extrusion head; 5. movable hole; 6. through groove; 7. bump; 8. through hole; , Square cone.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Please refer to Fig. 1 to Fig. 10, an expansion anchor bolt, including a screw rod 1, a limit sleeve 2 and an expansion tube 3, wherein the screw rod 1, the limit sleeve 2 and the expansion tube 3 are all made of metal materials; The expansion tube 3 is sleeved on the outer wall of the screw rod 1, wherein the limit sleeve 2 is arranged on one end of the expansion tube 3, and the limit sleeve 2 is movably connected with the expansion tube 3; one end of the limit sleeve 2 is sleeved on the expansion tube 3, wherein the other end of the limiting sleeve 2 is provided with a conical extruding head 4; the inner wall of the limiting sleeve 2 is provided with an internal thread, wherein the screw 1 is threadedly connected with the inner wall of the limiting sleeve 2; During the installation process, first use a drilling rig to drill holes on the wall, then insert the screw 1, the expansion tube 3 and the limit sleeve 2 into the holes, and then turn the screw 1 to make the screw 1 push the expansion tube 3 to the limit sleeve One end of the cylinder 2 moves, and then the extrusion head 4 at the end of the limit sleeve 2 shrinks into the expansion tube 3, and the extrusion head 4 squeezes one end of the expansion tube 3 to generate an outward expansion force, so that the expansion tube 3 squeezes the wall The body is used for anchoring with the wall.

Please refer to Fig. 4 to Fig. 9 in combination, as a further solution of the present invention: the expansion tube 3 is provided with four movable holes 5 equidistantly at one end close to the limit sleeve 2, and the periphery of the expansion tube 3 is equidistantly opened along the axial direction. There are four through grooves 6, wherein each through groove 6 communicates with the movable hole 5 respectively; the positions corresponding to the four movable holes 5 on the outer wall of the limit sleeve 2 are respectively provided with protrusions 7, wherein the protrusions 7 are arranged on In the movable hole 5 , the protrusion 7 slides in the movable hole 5 .

In the above scheme, by setting the protrusion 7 on the outer wall of the limit sleeve 2 to cooperate with the movable hole 5 opened on the expansion tube 3, as the screw rod 1 and the limit sleeve 2 are tightened, the outer wall of the limit sleeve 2 is set at The bump 7 will move along the movable hole 5, wherein the movable hole 5 plays a guiding role on the one hand, and also plays a limiting role on the limit sleeve 2 on the other hand, so as to prevent the limit sleeve 2 and the screw rod 1 from being screwed together. During the process, it rotates together with the screw 1, so as to effectively control the rotation of the limit sleeve 2, and at the same time, it is convenient for the screw 1 to push the expansion tube 3 to move to one end of the limit sleeve 2, so that the extrusion head at the end of the limit sleeve 2 moves in 4 directions. The expansion tube 3 shrinks inside, and the extrusion head 4 squeezes one end of the expansion tube 3 to generate an outward expansion force, thereby enhancing the fastness of the expansion anchor bolt.

Please refer to Fig. 7 to Fig. 9, as a further solution of the present invention: the connecting ends of the four through grooves 6 and the expansion pipe 3 are respectively provided with through holes 8, wherein the other end of the through groove 6 extends to the end of the expansion pipe 3 ; The four through grooves 6 divide the expansion tube 3 into four expansion pieces 9 at equal distances;

In the above-mentioned scheme, by opening four through grooves 6 on the expansion pipe 3, it can be ensured that the expansion pipe 3 has sufficient strength and expansion, and it is convenient for production and processing. The hole 8 is convenient for the expansion sheet 9 to have enough expansion space in the process of outward expansion, and will not cause damage to the expansion tube 3; when the screw 1 pushes the expansion tube 3 to move to the end of the limit sleeve 2, the limit The extrusion head 4 at the end of the sleeve 2 shrinks into the expansion tube 3, and the extrusion head 4 drives the four expansion sheets 9 to generate an outward expansion force, so that the four expansion sheets 9 all squeeze the wall for contact with the wall. Body anchoring, enhance the stability of the anchored object, and strengthen the connection between the expansion anchor bolt and the wall.

Please refer to FIG. 7 to FIG. 9 in combination, as a further solution of the present invention: the outer wall of the expansion sheet 9 is equidistantly provided with several upwardly protruding square cones 10 , wherein the square cones 10 and the expansion sheet 9 are integrally formed.

In the above-mentioned scheme, by arranging a plurality of square cones 10 on each expansion piece 9, the friction force between the expansion piece 9 and the wall can be increased, and the problem of rotation of the expansion anchor during the expansion and anchoring process can be avoided. , so that the connection between the expansion anchor bolt and the wall is strengthened, thereby improving the pull-out performance of the expansion anchor bolt.

To sum up: the utility model rotates the screw rod 1, so that the screw rod 1 pushes the expansion tube 3 to move to one end of the limit sleeve 2, and then makes the extrusion head 4 at the end of the limit sleeve 2 shrink into the expansion tube 3, thereby Make the extrusion head 4 drive the four expansion sheets 9 to generate outward expansion force, and then make the four expansion sheets 9 squeeze the wall for anchoring with the wall, by setting multiple expansion sheets 9 on each expansion sheet 9 The square cone truncated 10 can increase the friction between the expansion sheet 9 and the wall, enhance the stability of the anchored object, avoid the problem that the expansion anchor bolt rotates during the expansion anchoring process, and make the connection between the expansion anchor bolt and the wall Be strengthened, thereby improving the pullout performance of the expansion anchor.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims (7)

1. An expansion anchor bolt, comprising a screw rod (1), a limiting sleeve (2) and an expansion tube (3), wherein the expansion tube (3) is sleeved on the outer wall of the screw rod (1); it is characterized in that the limiter The positioning sleeve (2) is set at one end of the expansion tube (3), wherein the limiting sleeve (2) is movably connected with the expansion tube (3); one end of the limiting sleeve (2) is sleeved on the expansion tube (3) In the tube cavity, the other end of the limit sleeve (2) is provided with a conical extrusion head (4); the inner wall of the limit sleeve (2) is provided with an internal thread, wherein the screw (1) and the limit sleeve Tube (2) inner wall threaded connection. 2. An expansion anchor bolt according to claim 1, characterized in that four movable holes (5) are equally spaced at one end of the expansion tube (3) close to the limit sleeve (2), and the expansion tube (3) (3) Four through-slots (6) are equally spaced along the axial direction around the periphery, and each of the through-slots (6) communicates with the movable hole (5) respectively. 3. An expansion anchor bolt according to claim 2, characterized in that, the positions corresponding to the four movable holes (5) on the outer wall of the limit sleeve (2) are respectively provided with bumps (7), Wherein the bump (7) is arranged in the movable hole (5), and the bump (7) slides in the movable hole (5). 4. An expansion anchor bolt according to claim 2, characterized in that a through hole (8) is provided at the connecting end of the through groove (6) and the expansion tube (3), wherein the through groove (6) is additionally One end extends to the end of the expansion tube (3). 5. The expansion anchor bolt according to claim 2, characterized in that, the four through grooves (6) divide the expansion tube (3) into four expansion pieces (9) equidistantly. 6. An expansion anchor bolt according to claim 5, characterized in that the end of the expansion sheet (9) is arc-shaped, wherein the ends of the expansion sheet (9) abut against the outer wall of the extrusion head (4) respectively . 7. An expansion anchor bolt according to claim 6, characterized in that, the outer wall of the expansion sheet (9) is equidistantly provided with several upwardly protruding square cones (10), wherein the square cones (10) It is integrally formed with the expansion sheet (9).

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