Internal thread expansion screw

Abstract

The utility model discloses an inner thread expansion screw relates to expansion screw design field, including inner thread sleeve, pull explosion sleeve and pull explosion rod, the inner thread sleeve is integrally formed with inner thread hole in, the inner thread sleeve right -hand end integrally formed with twist member, the pull explosion rod is integrally formed with outer thread, and the outer thread screw thread cooperation is installed in the inner thread hole, the pull explosion sleeve sleeve joint is installed on the pull explosion rod, the left side integrally formed with the slot of pull explosion sleeve, the left end integrally formed with the conical column of pull explosion rod, the conical column drives pull explosion sleeve and along the slot and explodes, compared with prior art, the utility model discloses before installation pull explosion sleeve is in the contraction state, and the overall structure is smooth, and the installation process will not happen interference, also solved the traditional product's silk, the problem of unfastening, can satisfy the fixing demand of heavy -duty equipment, large -scale component, and the installation flexibility is high, improves construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of expansion screw design, and in particular to internal thread expansion screws. Background Technology

[0002] Expansion bolts, as a commonly used fastener, are widely used in various fields such as building decoration and equipment installation, including cable tray fixing, duct laying, water supply and drainage pipe installation, ceiling air conditioner suspension, and building structure reinforcement. Their core function is to achieve a firm connection with the substrate (such as walls or concrete components) through expansion force. However, traditional expansion bolts have gradually revealed many significant defects during long-term use and actual construction, seriously affecting construction quality and safety. 1. Traditional expansion bolts often have exposed screws or expansion structures. When used as embedded parts, the protruding structure is prone to collision or compression with embedded pipes, reinforcing bars, etc., which may lead to damage or leakage of embedded pipes or affect the arrangement of reinforcing bars, thus leaving safety hazards.

[0003] 2. After installation, due to factors such as vibration and temperature changes, gaps are prone to appear at the threaded joints of traditional expansion bolts, which can lead to stripping and loosening. Especially in hoisting and load-bearing scenarios, the risk of loosening can directly affect the stability of equipment or structures.

[0004] 3. The threads of traditional expansion bolts are directly exposed to the installation environment. Collisions during construction, friction from base debris, and factors such as moisture and corrosion during use can easily lead to thread wear, deformation, or rust, directly affecting the thread fit accuracy and shortening the overall service life.

[0005] 4. Traditional expansion bolts mostly require the expansion element to be installed in the hole of the base first, and then the bolt is installed at the expansion element to achieve the expansion and locking effect. This design makes it difficult to ensure the contact area between the expansion element and the base, resulting in insufficient connection strength. It is difficult to meet the load-bearing requirements of scenarios such as hoisting heavy equipment and fixing large components. Moreover, it has the defects of difficult construction, cumbersome operation and low construction efficiency. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model provides a technical solution that can solve the above problems.

[0007] Internal thread expansion bolt, including internal thread sleeve, expansion sleeve and expansion rod; The inner ring of the internal threaded sleeve is integrally formed with an internal threaded hole, the outer side of the right end of the internal threaded sleeve is integrally formed with a torsion member, and the pull rod is integrally formed with an external thread, and the external thread is helically fitted into the internal threaded hole. The detonating sleeve is fitted onto the detonating rod. The left side of the detonating sleeve is integrally formed with a groove, and the left end of the detonating rod is integrally formed with a tapered column. The detonating sleeve is located between the tapered column and the internal threaded sleeve. The tapered column drives the detonating sleeve to burst open along the groove.

[0008] Furthermore, both the inner threaded sleeve and the expansion sleeve have a cylindrical structure.

[0009] Furthermore, the outer diameter of the inner threaded sleeve is the same as the outer diameter of the burst sleeve.

[0010] Furthermore: at least three grooves are provided, and the at least three grooves are arranged in a circular array on the expansion sleeve.

[0011] Furthermore, the outer circumference of the burst sleeve is integrally formed with at least three circular holes, the number of which is the same as the number of the slots, and the right end of each slot corresponds to one of the circular holes.

[0012] Furthermore: one of the grooves completely cuts off the burst sleeve, and the circular hole is located in the middle of the groove.

[0013] Furthermore, the conical column has a conical structure that is wider on the left and narrower on the right.

[0014] Furthermore: the torsion member is an external hexagonal nut.

[0015] Furthermore, the inner threaded sleeve, the detonating sleeve, and the detonating rod are all made of metal.

[0016] Furthermore, the outer circumference of the burst sleeve is integrally formed with an anti-slip surface.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. The internal threaded sleeve and the expansion sleeve are designed separately. Before installation, the expansion sleeve is in a retracted state. The overall structure is smooth and has no exposed protrusions. When inserted into the pre-embedded hole, it will not interfere with the pre-embedded pipeline, steel bars, etc., effectively avoiding damage to the pre-embedded components and greatly improving the safety and reliability of the installation of pre-embedded parts.

[0018] 2. The burst sleeve has at least three circularly distributed grooves, which, together with the tapered column structure that is wider on the left and narrower on the right, and the nut structure at the right end, make the burst sleeve burst evenly along the circumference, forming a comprehensive and large-area fit with the hole wall of the base, thus completely solving the problems of slippage and loosening of traditional products.

[0019] 3. The internal thread hole of the internal threaded sleeve runs through the entire internal threaded sleeve. During installation, the outer end of the internal threaded sleeve will not directly contact the debris, dust or corrosive media of the base material, effectively avoiding wear, corrosion and deformation of the threads, and can be used as an embedded part; in addition, the internal threaded sleeve, the expansion sleeve and the expansion rod are all made of metal materials, with high structural strength and strong corrosion resistance, which significantly improves the overall service life of the product.

[0020] 4. After the expansion sleeve bursts open, the contact area between it and the base is significantly increased compared to traditional expansion bolts. Combined with the high strength characteristics of metal materials, it significantly improves the connection strength and lifting load-bearing capacity, which can meet the fixing requirements of heavy equipment and large components. At the same time, the expansion sleeve achieves adjustable bursting through the groove design, which can adapt to bases with different hole diameters and materials within a certain range, making the installation more flexible.

[0021] 5. The torsion component adopts an external hexagonal nut design, which can be used with tools such as electric wrenches to achieve quick tightening without complicated operation; during installation, simply insert it into the hole and tighten the torsion component, and the tapered column will be driven by the thread to push the bursting sleeve to burst open. The positioning is accurate and the operation is simple, which greatly shortens the construction time, improves the construction efficiency, and reduces labor costs.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure when the detonating sleeve is inserted into the detonating rod; Figure 3 This is a structural diagram of the present invention before installation; Figure 4 yes Figure 1 A structural diagram from another perspective; Figure 5 yes Figure 1 A schematic diagram of the cross-sectional structure; Figure 6 yes Figure 2 A schematic diagram of the cross-sectional structure; Figure 7This is a schematic diagram of a structure with an anti-slip surface installed on a burst sleeve.

[0025] The following components are shown in the figure: 1. Internal threaded sleeve; 2. Expansion sleeve; 3. Expansion rod; 4. Internal threaded hole; 5. Torsion component; 6. External thread; 7. Groove; 8. Tapered column; 9. Round hole; 10. Anti-slip surface. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0028] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1-7 As shown, the internal thread expansion screw of this utility model includes an internal thread sleeve 1, a burst sleeve 2, and a burst rod 3; The inner ring of the internal threaded sleeve is integrally formed with an internal threaded hole 4, the outer side of the right end of the internal threaded sleeve is integrally formed with a torsion member 5, and the pull rod 3 is integrally formed with an external thread 6, and the external thread 6 is helically fitted into the internal threaded hole 4. The detonating sleeve 2 is sleeved and installed on the detonating rod 3. The left side of the detonating sleeve 2 is integrally formed with a groove 7. The left end of the detonating rod 3 is integrally formed with a tapered column 8. The detonating sleeve 2 is located between the tapered column 8 and the internal thread sleeve. The tapered column 8 drives the detonating sleeve 2 to burst open along the groove 7. The principle is as follows: When this utility model is inserted into a hole in the wall or other location, the expansion sleeve 2 is in an unexploded state before the internal thread sleeve 1 is locked, making it easy to insert the utility model into the hole. After insertion, tightening the torsion member 5 applies pressure to the internal thread sleeve 1, pressing it into the hole. At this time, the tapered column 8 of the expansion rod 3 drives the expansion sleeve 2 to burst open along the groove 7. When the expansion sleeve 2 bursts open, it can lock the hole. Continuing to tighten the torsion member 5 can achieve complete bursting of the expansion sleeve 2 through the cooperation between the external thread 6 and the internal thread hole 4, thereby achieving stable installation of the internal thread expansion screw. Installation is more convenient and construction efficiency is accelerated. In addition, the internal thread hole 4 near the torsion member 5 will not be damaged during the installation of the internal thread expansion screw, making it suitable for the installation and application of pre-embedded parts in the hole.

[0032] Furthermore, both the inner threaded sleeve and the expansion sleeve 2 are cylindrical in shape, making it easy to insert this utility model into the hole where an expansion screw needs to be installed.

[0033] Furthermore, the outer diameter of the inner threaded sleeve is the same as the outer diameter of the burst sleeve 2, which can effectively resist the burst sleeve 2 for stable expansion and fixation.

[0034] Furthermore, at least three grooves 7 are provided, and the at least three grooves 7 are arranged in a circular array on the burst sleeve 2; this allows the burst sleeve 2 to burst open evenly along the circumferential direction, achieving a more stable installation effect.

[0035] Furthermore, the outer circumference of the expansion sleeve 2 is integrally formed with at least three circular holes 9, the number of which is the same as the number of the grooves 7, and the right end of each groove 7 is inserted into one of the circular holes 9; this can prevent the expansion sleeve 2 from being damaged along the grooves 7 when it bursts open, thereby ensuring the installation stability of its internal thread expansion screw.

[0036] Furthermore: one of the grooves 7 is designed to completely cut off the expansion sleeve 2, and the round hole 9 is located in the middle of the groove 7; this allows the expansion sleeve 2 to burst open completely, achieving the technical effect of making the internal thread expansion screw suitable for different hole sizes.

[0037] Furthermore: the tapered column 8 has a conical structure that is wider on the left and narrower on the right; when the external thread 6 is locked into the internal thread hole 4, the tapered part will move to the right to press and tighten the expansion sleeve 2, and the conical structure will drive the expansion sleeve 2 to burst open along the groove 7, so as to realize the secure installation of the internal thread expansion screw in the hole.

[0038] Furthermore, the torsion member 5 uses an external hexagonal nut; it can be quickly installed and locked using an electric wrench, thus accelerating production efficiency.

[0039] Furthermore, the internal threaded sleeve 1, the expansion sleeve 2, and the expansion rod 3 are all made of metal materials, which can ensure the strength of the internal threaded expansion screw and prevent loosening after installation.

[0040] Furthermore, the outer circumference of the expansion sleeve 2 is integrally formed with an anti-slip surface 10; the anti-slip surface 10 can prevent the expansion sleeve 2 from rotating together with the internal thread sleeve in the hole, ensuring the stable bursting of the internal thread expansion screw, and facilitating construction and use.

[0041] In this utility model, the internal threaded sleeve 1, the expansion sleeve 2, and the expansion rod 3 are all finished products in bulk. By pre-embedding them in the floor slab, the risk of damaging the conduit is reduced, while the lifting force is also enhanced.

[0042] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. An internal thread expansion screw, characterized in that: Includes internal threaded sleeves, expansion sleeves, and expansion rods; The inner ring of the internal threaded sleeve is integrally formed with an internal threaded hole, the outer side of the right end of the internal threaded sleeve is integrally formed with a torsion member, and the pull rod is integrally formed with an external thread, and the external thread is helically fitted into the internal threaded hole. The detonating sleeve is fitted onto the detonating rod. The left side of the detonating sleeve is integrally formed with a groove, and the left end of the detonating rod is integrally formed with a tapered column. The detonating sleeve is located between the tapered column and the internal threaded sleeve. The tapered column drives the detonating sleeve to burst open along the groove.

2. The internal thread expansion screw according to claim 1, characterized in that: Both the inner threaded sleeve and the expansion sleeve have a cylindrical structure.

3. The internal thread expansion screw according to claim 2, characterized in that: The outer diameter of the inner threaded sleeve is the same as the outer diameter of the burst sleeve.

4. The internal thread expansion screw according to claim 1, characterized in that: The cut groove is provided with at least three, and the at least three cut grooves are arranged in a circular array on the burst sleeve.

5. The internal thread expansion screw according to claim 4, characterized in that: The outer circumference of the burst sleeve is integrally formed with at least three circular holes, the number of which is the same as the number of grooves, and the right end of each groove corresponds to one of the circular holes.

6. The internal thread expansion screw according to claim 5, characterized in that: One of the grooves completely cuts off the burst sleeve, and the circular hole is located in the middle of the groove.

7. The internal thread expansion screw according to any one of claims 1-4, characterized in that: The conical column has a cone-shaped structure that is wider on the left and narrower on the right.

8. The internal thread expansion screw according to claim 1, characterized in that: The torsion component is an external hexagonal nut.

9. The internal thread expansion screw according to claim 1, characterized in that: The inner threaded sleeve, the bursting sleeve, and the bursting rod are all made of metal.

10. The internal thread expansion screw according to claim 1, characterized in that: The outer circumference of the burst sleeve is integrally formed with an anti-slip surface.

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