Expansion screw structure

Abstract

The utility model relates to the technical field of expansion screws, and discloses an expansion screw structure which is characterized in that a driving mechanism is used for expansion driving of an expansion sleeve mechanism, a fastening expansion sleeve comprises a plurality of independent single expansion sleeves, a conical sliding block is movably installed in the fastening expansion sleeve through a conical caulking groove, the expansion sleeves are arranged in a split structure, and the expansion sleeve is arranged in the conical caulking groove. The fastening expansion sleeve is formed through butt joint and splicing, one end of the fastening expansion sleeve is sleeved and limited through the end limiting ring, when the conical sliding block is installed, the fastening expansion sleeve can be opened through opening and closing expansion, the conical sliding block is installed in an embedded mode, the installation convenience of the conical sliding block is greatly improved, and due to the split type structure, the conical sliding block can be installed conveniently and rapidly. When the conical sliding block slides and drives the fastening expansion sleeve, expansion of the fastening expansion sleeve is not limited by the structure of the fastening expansion sleeve, expansion is more sufficient, the fastening expansion sleeve can be more sufficiently attached and fastened to the inner wall of the pipe body, and due to the fact that the structure is independent, the conical sliding block can be used in cooperation with fastening expansion sleeves of different shapes, and the fastening expansion sleeve can be suitable for expansion installation of pipe bodies of different shapes.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion screws, in particular to an expansion screw structure. Background Art

[0002] Expansion screws, also known as threaded expansion sleeves, are a commonly used fastener. Their main purpose is to provide support and fixation inside holes in building walls or pipe holes. They are fastening support structures installed as additional components. Existing expansion screws mainly include a conical head screw and an expansion sleeve. When in use, the expansion sleeve is sleeved over the outside of the conical head screw, which is then inserted into the installation hole. The conical head of the screw squeezes the pipe wall of the expansion sleeve and expands it. The expansion support of the expansion sleeve is used to achieve a locking connection between the expansion sleeve and the hole to achieve the purpose of fastening.

[0003] Expansion screws are often used as internal support connection structures at the ends of metal pipe fittings. Different from traditional hard expansion sleeves, in order to protect the pipe wall and increase the tightening friction, the expansion sleeve is made of soft material, and the expansion drive of the expansion sleeve is achieved by relying on the sliding support of the tapered slider inside. The expansion sleeve of existing expansion screws mostly adopts an integrated structure setting, which is not only not conducive to the connection and installation of the tapered slider, but also the expansion of the expansion sleeve is restricted due to the restriction of the sleeve-like structure, which is not conducive to the expansion and tightening of the expansion sleeve. Therefore, an expansion screw structure is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an expansion screw structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: an expansion screw structure, comprising an expansion sleeve mechanism and a driving mechanism, the driving mechanism is used for expansion driving of the expansion sleeve mechanism, the driving mechanism comprises a tapered slider and a driving bolt, the driving bolt is installed in the middle of the tapered slider;

[0006] The expansion sleeve mechanism is arranged on the outside of the tapered slider, and the expansion sleeve mechanism includes a fastening expansion sleeve and an end limit ring. The fastening expansion sleeve includes a plurality of independent single expansion sleeves, and the end limit ring is fitted and sleeved on the end of the fastening expansion sleeve. A tapered embedding groove is arranged inside the fastening expansion sleeve, and the tapered slider is movably installed inside the fastening expansion sleeve through the tapered embedding groove.

[0007] Preferably, several of the above-mentioned single expansion sleeves are distributed in a ring shape, and several of the single expansion sleeves are assembled and joined together to form a fastening expansion sleeve.

[0008] Preferably, both end sides of the above-mentioned fastening expansion sleeve are provided with ring installation grooves, the ring installation grooves are adapted to the end limit rings, and the end limit rings are embedded and installed in the rear part of the fastening expansion sleeve through the ring installation grooves.

[0009] Preferably, a driving screw hole is provided through the middle of the conical sliding block, the driving screw hole is adapted to be matched with a driving bolt, and the end of the driving bolt is threadedly connected to the inside of the driving screw hole.

[0010] Preferably, ball head bumps are evenly fixed on the outer peripheral side of the conical slider, bump grooves are evenly arranged inside the conical groove, the bump grooves are adapted to the ball head bumps, and the ball head bumps are slidably engaged in the inner side of the bump grooves.

[0011] Preferably, the tightening expansion sleeve is cylindrical, and the end limiting ring is circular.

[0012] Preferably, the above-mentioned fastening expansion sleeve is in the shape of a square column, and the end limiting ring is in the shape of a square ring.

[0013] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0014] The expansion screw adopts a split structural setting for the expansion sleeve, and a fastening expansion sleeve is formed by butt assembly, and one end of the fastening expansion sleeve is limited by an end limit ring. When installing the tapered slider, the fastening expansion sleeve can be opened by opening and closing expansion and the tapered slider can be installed in an embedded manner. The operation is convenient, and the installation convenience of the tapered slider is greatly improved. Due to the split structural setting, the expansion of the fastening expansion sleeve will not be limited by its own structure when the tapered slider is driven to slide, and the expansion is more sufficient, and it can be more fully fitted and fastened to the inner wall of the pipe body. Moreover, due to the independent structure, the tapered slider can be used in combination with fastening expansion sleeves of different shapes, and can be suitable for expansion installation of pipes of different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall front side structure of the cylindrical shape of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall rear side structure of the cylindrical shape of the utility model;

[0018] Figure 3 This is a schematic diagram of the front side structure of the cylindrical shape of the utility model after being disassembled as a whole;

[0019] Figure 4This is a schematic diagram of the rear structure of the utility model after the cylindrical shape is disassembled as a whole;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the conical slider of the utility model;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the square column-shaped expansion sleeve mechanism of the utility model.

[0022] Explanation of the reference numerals: 1. conical slider; 2. driving bolt; 3. tightening expansion sleeve; 4. end limiting ring; 5. driving screw hole; 6. conical groove; 7. ball head protrusion; 8. protrusion groove; 9. ring mounting groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] Embodiment 1

[0026] See also Figure 1-5 The utility model provides a technical solution: an expansion screw structure, including an expansion sleeve mechanism and a driving mechanism, the driving mechanism is used for expansion driving of the expansion sleeve mechanism, the driving mechanism includes a tapered slider 1 and a driving bolt 2, as shown in the attached Figure 5 As shown, the conical slider 1 is in the shape of a cone column. In order to be connected and installed with the driving bolt 2, a driving screw hole 5 is opened through the middle of the conical slider 1. The driving screw hole 5 is adapted to the driving bolt 2. The end of the driving bolt 2 is threadedly connected to the inside of the driving screw hole 5 to realize the sliding drive of the conical slider 1.

[0027] The expansion sleeve mechanism is arranged outside the tapered slider 1, and the expansion sleeve mechanism includes a fastening expansion sleeve 3 and an end stop ring 4. Figure 1As shown, the fastening expansion sleeve 3 can be made of rubber material, the fastening expansion sleeve 3 is cylindrical, the end limit ring 4 can be made of metal material and is used for the set limit of the end of the fastening expansion sleeve 3, the end limit ring 4 is a circular ring shape, which is suitable for the internal support of the circular tube body, and the fastening expansion sleeve 3 adopts a split structure setting. The fastening expansion sleeve 3 includes multiple independent single expansion sleeves, and several single expansion sleeves are distributed in a ring shape. The fastening expansion sleeve 3 is assembled by mosaic. Due to the split structure setting, the expansion of the fastening expansion sleeve 3 will not be limited by its own structure when the conical slider 1 is driven to slide, and the expansion is more sufficient.

[0028] In order to install and connect the end stop ring 4, as shown in the attached Figure 3 As shown, ring mounting grooves 9 are provided on both end sides of the fastening expansion sleeve 3, and the ring mounting grooves 9 are adapted to the end limiting ring 4. The end limiting ring 4 is installed in the rear part of the fastening expansion sleeve 3 through the ring mounting grooves 9. The rear part of the fastening expansion sleeve 3 can be limited by the fitting fitting to facilitate the expansion action of the front part of the fastening expansion sleeve 3. When installing the conical slider 1, the fastening expansion sleeve 3 can be opened by opening and closing the expansion and the conical slider 1 can be fitted and installed. The operation is convenient, which greatly improves the installation convenience of the conical slider 1.

[0029] In order to facilitate the fitting and installation of the tapered slider 1, as shown in the attached Figure 3 As shown, a conical embedding groove 6 is provided inside the fastening expansion sleeve 3, and the conical embedding groove 6 is adapted to the conical slider 1. The conical slider 1 is slidably embedded in the fastening expansion sleeve 3 through the conical embedding groove 6. In order to improve the sliding stability of the conical slider 1 and limit the rotation of the conical slider 1, as shown in the attached Figure 4 As shown, ball head protrusions 7 are evenly fixed on the outer peripheral side of the conical slider 1, and protrusion grooves 8 are evenly arranged inside the conical groove 6. The protrusion grooves 8 are adapted to the ball head protrusions 7. The ball head protrusions 7 are slidably engaged in the inner side of the protrusion grooves 8, which can provide a stable sliding guide for the conical slider 1 and can clamp and limit the axial rotation of the conical slider 1, thereby facilitating the tightening operation of the driving bolt 2.

[0030] Working principle or structural principle, the end limit ring 4 has a variety of shapes, which can be flexibly selected according to the shape of the pipe body. Before use, the bolt is assembled as a whole. During assembly, the alignment assembly of the fastening expansion sleeve 3 is first completed by mosaic assembly, and then the end limit ring 4 is embedded and installed into the ring installation groove 9 at the rear end of the fastening expansion sleeve 3 by set embedding. After completion, the front end of the fastening expansion sleeve 3 is opened by fingers, and then the tapered slider 1 is installed into the tapered embedding groove 6 in the end limit ring 4 by mosaic, completing the assembly of the bolt as a whole;

[0031] During installation, the ball head protrusion 7 on the upper part of the conical slider 1 is engaged with the protrusion embedding groove 8 in the conical embedding groove 6, and then the assembled end limit ring 4 is integrally engaged and placed in the hole at the end of the tube body, and then the driving bolt 2 is passed through the hole in the middle of the mounting piece, and then the end of the driving bolt 2 is installed in the driving screw hole 5 in the middle of the conical slider 1, and then the driving bolt 2 is tightened by screwing. Under the threaded drive of the driving bolt 2, the conical slider 1 slides inside the conical embedding groove 6, and the fastening expansion sleeve 3 is expanded and driven by the sliding support, so that the outside of the fastening expansion sleeve 3 is pressed and supported on the inside of the tube body, thereby realizing the expansion support of the mounting piece and completing the installation operation.

[0032] Embodiment 2

[0033] See also Figure 6 , which is different from the first embodiment: Figure 6 As shown, the fastening expansion sleeve 3 is in the shape of a square column, and the end limiting ring 4 is in the shape of a square ring, which is suitable for the internal support of a square tube body. Due to the independent structure, the conical slider 1 can be used in combination with fastening expansion sleeves 3 of different shapes, and can be suitable for the expansion installation of tubes of different shapes.

[0034] The working principle or structural principle and the installation operation steps are the same as those of the first embodiment, except that the square columnar fastening expansion sleeve 3 is matched with the conical slider 1 and is suitable for the internal support of the square tube body.

[0035] In summary, the expansion screw adopts a split structural setting for the expansion sleeve, and the fastening expansion sleeve 3 is formed by docking and assembly, and one end of the fastening expansion sleeve 3 is limited by the end limit ring 4. When the conical slider 1 is installed, the fastening expansion sleeve 3 can be opened by opening and closing expansion and the conical slider 1 can be installed in an embedded manner. The operation is convenient, and the installation convenience of the conical slider 1 is greatly improved. Due to the split structural setting, the expansion of the fastening expansion sleeve 3 will not be limited by its own structure when the conical slider 1 is driven to slide, and the expansion is more sufficient. It can be more fully fitted and fastened with the inner wall of the pipe body, and due to the independent structure, the conical slider 1 can be used in combination with fastening expansion sleeves 3 of different shapes, and can be suitable for expansion installation of pipes of different shapes.

[0036] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. An expansion screw structure, comprising an expansion sleeve mechanism and a driving mechanism, characterized in that: The driving mechanism is used for expansion driving of the expansion sleeve mechanism, and comprises a conical slider (1) and a driving bolt (2), wherein the driving bolt (2) is installed in the middle of the conical slider (1); The expansion sleeve mechanism is arranged outside the conical slider (1), and the expansion sleeve mechanism comprises a fastening expansion sleeve (3) and an end limit ring (4). The fastening expansion sleeve (3) comprises a plurality of independent single expansion sleeves, and the end limit ring (4) is fitted and sleeved on the end of the fastening expansion sleeve (3). The fastening expansion sleeve (3) is provided with a conical embedding groove (6) inside, and the conical slider (1) is movably installed inside the fastening expansion sleeve (3) through the conical embedding groove (6).

2. An expansion screw structure according to claim 1, characterized in that: A plurality of the single expansion sleeves are distributed in a ring shape, and a plurality of the single expansion sleeves are assembled and joined together to form a fastening expansion sleeve (3).

3. An expansion screw structure according to claim 2, characterized in that: Both end sides of the tightening expansion sleeve (3) are provided with ring mounting grooves (9), the ring mounting grooves (9) are adapted to the end stop ring (4), and the end stop ring (4) is mounted on the rear part of the tightening expansion sleeve (3) through the ring mounting grooves (9).

4. An expansion screw structure according to claim 3, characterized in that: A driving screw hole (5) is provided through the middle of the conical sliding block (1), the driving screw hole (5) is adapted to the driving bolt (2), and the end of the driving bolt (2) is threadedly connected to the inside of the driving screw hole (5).

5. The expansion screw structure according to claim 3, characterized in that: The outer peripheral side of the conical slider (1) is evenly fixed with ball head convex blocks (7), and the interior of the conical embedding groove (6) is evenly provided with convex embedding grooves (8). The convex embedding grooves (8) are adapted to the ball head convex blocks (7), and the ball head convex blocks (7) are slidably embedded in the inner side of the convex embedding grooves (8).

6. An expansion screw structure according to claim 1, characterized in that: The tightening expansion sleeve (3) is cylindrical, and the end limiting ring (4) is circular.

7. An expansion screw structure according to claim 1, characterized in that: The tightening expansion sleeve (3) is in the shape of a square column, and the end limiting ring (4) is in the shape of a square ring.

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