A kind of shockproof and impact-resistant expansion screw

Abstract

The present invention discloses an anti-seismic and anti-impact expansion screw, comprising an expansion sleeve unit and a screw body unit, wherein the expansion sleeve unit comprises an expansion outer sleeve, and the screw body unit comprises an inner screw, wherein the expansion end of the expansion outer sleeve is provided with a positioning tooth, and the inner wall of the positioning tooth is provided to be bendably protrude from the inner wall of the expansion outer sleeve, and the inner screw comprises a threaded rod, and a vibration fastening mechanism is provided at the bottom of the threaded rod, and the vibration fastening mechanism comprises a positioning plate and a transmission plate, wherein the transmission plate is fixedly connected to the end of the threaded rod, and the positioning plate is clamped on the transmission plate, and a cavity is formed between the positioning plate and the transmission plate, and a vibration weight and a swinging curved rod are provided in the cavity, wherein one end of the swinging curved rod is coaxially connected to the vibration weight, and the other end is connected to the transmission plate through a flange structure, and the inner screw is fastened to the expansion sleeve through the swing of the vibration weight.

Description

Technical Field

[0001] The invention relates to the technical field of hardware tools, in particular to an expansion screw, in particular to a shock-proof and impact-resistant expansion screw. Background Art

[0002] Expansion screws are a special threaded connector used to fix pipe supports / hangers / brackets or equipment on walls, floors, and columns. In the usual sense, expansion screws generally refer to metal expansion screws. In the prior art, expansion screws are generally composed of components such as a screw and an expansion sleeve. The tail of the screw is conical, and the inner diameter of the cone is larger than the inner diameter of the expansion sleeve. When the nut is tightened, the screw moves outward, and the axial movement of the thread causes the cone part to move, thereby forming a large positive pressure on the outer circumference of the expansion sleeve. In addition, the angle of the cone is very small, so that friction self-locking is formed between the wall, the expansion sleeve and the cone, thereby achieving a fixing effect. At present, expansion screws have been widely used in the construction and other industries, but the existing expansion sleeves only expand at the very end to achieve the fixing effect, and the force is all on one point, resulting in uneven force, which in turn causes damage to the wall or rock structure. In addition, due to vibration or impact, the external expansion sleeve and the surrounding wall will be dislocated, forming cavities or cracks, which will cause the friction between the expansion sleeve and the wall to decrease. Since there is no external force to continue to screw the internal screw body at this time, the tightness of the expansion screw itself will gradually decrease under vibration and impact, affecting the connection strength of the expansion screw. Under multiple impacts, if the internal screw body cannot be stabilized in time, the expansion sleeve in the cavity will produce a secondary impact with the cavity of the wall, further destroying the state of the expansion sleeve, reducing its own stability, and affecting the mounting effect. Summary of the invention

[0003] In order to solve the above technical problems, the present invention is solved through the following technical solutions: a seismic and impact-resistant expansion screw is provided, including an expansion sleeve unit and a screw body unit, the expansion sleeve unit includes an expansion sleeve, the screw body unit includes an inner screw, the expansion end of the expansion sleeve is provided with a positioning tooth, the inner wall of the positioning tooth is provided to be bendably protrude from the inner wall of the expansion sleeve, the inner screw includes a threaded rod, the bottom of the threaded rod is provided with a vibration fastening mechanism, the vibration fastening mechanism includes a positioning plate and a transmission plate, the transmission plate is fixedly connected to the end of the threaded rod, the positioning plate is clamped on the transmission plate, a cavity is formed between the positioning plate and the transmission plate, a vibration rotor and a swinging curved rod are provided in the cavity, one end of the swinging curved rod is coaxially connected to the vibration rotor, and the other end is connected to the transmission plate through a flange structure, and the inner screw is fastened to the expansion sleeve by the swing of the vibration rotor.

[0004] Preferably, a plurality of inner flanges are arranged on the circumferential wall inside the positioning plate, the cross section of the inner flange is a curved convex shape, and a plurality of clamping protrusions are arranged on the inner side facing the center direction of the positioning plate.

[0005] Preferably, the vibration fastening mechanism is provided with a center column, a positioning hole is provided in the middle of the positioning disk, the center column is inserted into the positioning hole, a transmission rod is rotatably connected to the center column, the transmission rod is connected to a vibration weight, the vibration weight is fixedly connected to the transmission rod, the other end of the transmission rod is connected to the transmission core transmission sleeve, the transmission core is provided with arc-shaped protrusions and grooves in the circumferential direction, and the transmission core is sleeved in the center position of the transmission disk.

[0006] Preferably, a pair of relatively arranged crankshafts are arranged in the transmission disk, the crankshafts are perpendicular to the bottom of the transmission disk, and the other end of the crankshafts is inserted into the positioning disk. It also includes a swing crankshaft, and the swing crankshaft is provided with a shaft hole. The swing crankshaft is rotatably sleeved on the crankshaft. The swing crankshaft is divided into two sections, one section is a convex arc surface, which is arranged around the transmission core, and the other end is connected to the convex arc surface and is away from the crankshaft shaft. It is in the shape of a long straight rod, and the rod end can be clamped with the flange structure by the rod end.

[0007] Preferably, a limiting groove is further provided at the bottom of the positioning plate, and the limiting groove is an elliptical through hole. A limiting column is provided on the bottom surface of the swing crank arm, and the limiting column is movably sleeved in the limiting groove to limit the swing range of the swing crank arm.

[0008] Preferably, the expansion sleeve comprises an insertion inlet and an expansion port, the expansion sleeve is a hollow cylindrical sleeve, an expansion sleeve thread is arranged inside the expansion sleeve, the insertion inlet is arranged at one end where the screw body unit is inserted, and the expansion port is arranged at an end away from the insertion inlet.

[0009] Preferably, it also includes positioning teeth, a plurality of the positioning teeth are circumferentially arranged on the expansion port, the positioning teeth are perpendicular to the end face of the expansion port, the roots of the positioning teeth are connected to the expansion port, the inner wall of one end of the positioning teeth away from the expansion port is arranged to be bendably protruded from the inner wall of the expansion sleeve, and after the screw body unit is inserted into the positioning tooth portion, the distal end of the positioning teeth expands and engages with the inner wall of the wall.

[0010] Preferably, a flaring groove is further provided on the wall of the expansion sleeve, and four groups of the flaring grooves are provided on one side of the expansion port end. The flaring groove is a rectangular through groove passing through the expansion sleeve, and one end of the flaring groove is connected to the expansion port, and the connection position is between the roots of the positioning teeth.

[0011] Preferably, one end of the expansion sleeve is clamped in the building opening, and the flared opening and the expansion opening expand radially after the inner screw is rotated and inserted, and the expansion sleeve is interference-connected with the building opening at one end of the expansion opening, and the center column abuts against the bottom of the building opening to provide support and friction for the positioning plate.

[0012] Preferably, after being subjected to a vibration impact, the vibration weight swings to generate an inclination force, and the inclination force drives the transmission core to rotate. The swing crankshaft is pushed to rotate by the transmission core, and one end of the swing crankshaft abuts against the transmission plate. The transmission plate transmits the force to the threaded rod, tightening the thread of the threaded rod and the threaded connection of the expansion sleeve to enhance stability.

[0013] The present invention provides an anti-vibration and impact-resistant expansion screw. Compared with the prior art, the present invention has the following beneficial effects: by arranging a raised positioning tooth on the expansion sleeve, the expansion tooth increases the friction force on the wall after the expansion process; by arranging a vibration rotor link, the problem of loosening of the pre-tightening force of the inner screw caused by impact vibration is solved, thereby enhancing the fastening force and mounting capacity of the expansion screw assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention 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 discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0015] Figure 1 The present invention is a schematic diagram of the combined state structure of a seismic and impact resistant expansion screw.

[0016] Figure 2 The invention discloses a screw body structure schematic diagram of a shockproof and impact-resistant expansion screw.

[0017] Figure 3 The invention discloses a schematic diagram of the expansion sleeve structure of an anti-seismic and anti-impact expansion screw.

[0018] Figure 4 The invention discloses a screw body structure schematic diagram of a shockproof and impact-resistant expansion screw.

[0019] Figure 5 The present invention is a schematic diagram of a vibration mechanism of a shockproof and impact-resistant expansion screw.

[0020] Figure 6The present invention is a schematic diagram of the cross-sectional structure of a vibration mechanism transmission part of a shockproof and impact-resistant expansion screw.

[0021] In the figure: 1-expansion sleeve, 11-insertion entrance, 12-expansion opening, 13-positioning tooth, 14-expansion groove, 2-inner screw, 21-threaded rod, 22-screw head, 3-center column, 31-positioning plate, 32-vibration rotor, 33-transmission rod, 34-transmission plate, 35-inner flange, 36-transmission core, 37-swing crankshaft, 38-crankshaft shaft, 39-limiting groove. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments described in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] An embodiment of the present invention provides a shock-proof and impact-resistant expansion screw, such as Figures 1 to 6 As shown, it includes an expansion sleeve unit and a screw body unit, the expansion sleeve unit includes an expansion sleeve 1, the expansion sleeve 1 includes an insertion port 11 and an expansion port 12, the expansion sleeve 1 is a hollow cylindrical sleeve, the expansion sleeve thread is arranged inside the expansion sleeve 1, the insertion port 11 is arranged at the insertion end of the screw body unit, and the expansion port 12 is arranged at the end away from the insertion port 11. It also includes positioning teeth 13, a plurality of positioning teeth 13 are circumferentially arranged on the expansion port 12, the positioning teeth 13 are perpendicular to the end face of the expansion port 12, the roots of the positioning teeth 13 are connected to the expansion port 12, the inner wall of the end of the positioning teeth 13 away from the expansion port 12 is arranged to be bendable and protrude from the inner wall of the expansion sleeve 1, after the screw body unit is inserted into the positioning teeth 13, the distal end of the positioning teeth 13 expands and engages with the inner wall of the wall. The wall of the expansion sleeve 1 is also provided with a flaring groove 14, and four groups of the flaring grooves 14 are arranged on one side of the end of the expansion port 12. The flaring grooves 14 are rectangular through grooves passing through the expansion sleeve 1, and one end of the flaring grooves 14 is connected to the expansion port 12, and the connection position is between the roots of the positioning teeth 13.

[0024] The screw body unit includes an inner screw 2 and a vibration fastening mechanism, the inner screw 2 includes a threaded rod 21 and a screw head 22, the screw head 22 is arranged at the exposed end of the inner screw 2, the screw head is provided with a hexagonal head, the threaded rod 21 is arranged as the insertion end of the inner screw 2, the bottom of the threaded rod 21 is provided with a vibration fastening mechanism, the vibration fastening mechanism is provided with a center column 3, a positioning plate 31 and a transmission plate 34, the transmission plate 34 is fixedly connected to the end of the threaded rod 21, the positioning plate 31 is clamped on the transmission plate 34, a cavity is formed between the positioning plate 31 and the transmission plate 34, a plurality of inner flanges 35 are provided on the circumferential wall inside the positioning plate 31, the cross-section of the inner flange 35 is a curved convex shape, and a plurality of clamping protrusions are provided on the inner side facing the center direction of the positioning plate 31. The positioning plate 31 is provided with a positioning hole in the middle, the central column 3 is inserted into the positioning hole, the central column 3 is rotatably connected with a transmission rod 33, the transmission rod 33 is connected with a vibration weight 32, the vibration weight 32 is fixedly connected with the transmission rod 33, the other end of the transmission rod 33 is transmission-engaged with a transmission core 36, the circumference of the transmission core 36 is provided with arc-shaped protrusions and grooves, and the transmission core 36 is sleeved in the center of the transmission plate 34. A pair of oppositely arranged crankshafts 38 are provided in the transmission plate 34, the crankshafts 38 are perpendicular to the bottom of the transmission plate 34, and the other end of the crankshafts 38 is inserted into the positioning plate 31. It also includes the swing crank rod 37, which is provided with a shaft hole, and the swing crank rod 37 is rotatably sleeved on the crank shaft 38. The swing crank rod 37 is divided into two sections, one section is a convex arc surface, which is arranged around the transmission core 36, and the other end is connected to the convex arc surface and is far away from the crank shaft 38. The end of the rod is in the shape of a long straight rod, and the rod end can be locked with the inner flange 35 through the rod end. The bottom of the positioning plate 31 is also provided with a limiting groove 39, and the limiting groove 39 is an elliptical through hole. The bottom surface of the swing crank rod 37 is provided with a limiting column, and the limiting column is movably sleeved in the limiting groove 39 to limit the swing range of the swing crank rod 37.

[0025] One end of the expansion sleeve 1 is clamped in the building opening, and the expansion slot 14 and the expansion opening 12 expand radially after the inner screw 2 is rotated and inserted. The expansion sleeve 1 is interference-connected with the building opening at one end of the expansion opening 12, and the center column 3 abuts against the bottom of the building opening to provide support and friction for the positioning plate 31. After being impacted by vibration, the vibration rotor 32 swings to generate an inclination force, and the inclination force drives the transmission core 36 to rotate. The swing crank 37 is driven to rotate by the transmission core 36, and one end of the swing crank 37 abuts against the transmission plate 34. The transmission plate 34 transmits force to the threaded rod 21, tightening the threads at the threaded connection between the threaded rod 21 and the expansion sleeve 1 to enhance stability.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An anti-seismic and anti-impact expansion screw, comprising an expansion sleeve unit and a screw body unit, wherein the expansion sleeve unit comprises an expansion outer sleeve (1), and the screw body unit comprises an inner screw (2), characterized in that: The expansion end of the expansion sleeve (1) is provided with a positioning tooth (13), the inner wall of the positioning tooth (13) is configured to be bendably protruded from the inner wall of the expansion sleeve (1), the inner screw (2) comprises a threaded rod (21), the bottom of the threaded rod (21) is provided with a vibration fastening mechanism, the vibration fastening mechanism is provided with a center column (3), a positioning plate (31) and a transmission plate (34), a cavity is formed between the positioning plate (31) and the transmission plate (34), and the circumferential wall inside the positioning plate (31) A plurality of inner flanges (35) are arranged on the upper surface, the cross section of the inner flanges (35) is in the shape of a curved convex protrusion, a positioning hole is arranged in the middle of the positioning plate (31), the central column (3) is inserted into the positioning hole, a transmission rod (33) is rotatably connected to the central column (3), the transmission rod (33) is connected to a vibration weight (32), the vibration weight (32) is fixedly connected to the transmission rod (33), the other end of the transmission rod (33) is connected to the transmission core (36) in a transmission sleeve manner, and the circular portion of the transmission core (36) is The transmission core (36) is sleeved at the center of the transmission disk (34), and a pair of oppositely arranged crankshafts (38) are arranged in the transmission disk (34). The crankshafts (38) are perpendicular to the bottom of the transmission disk (34), and the other end of the crankshafts (38) is inserted into the positioning disk (31). The transmission core (36) is sleeved at the center of the transmission disk (34), and a pair of oppositely arranged crankshafts (38) are arranged in the transmission disk (34). The other end of the crankshafts (38) is inserted into the positioning disk (31), and the transmission core (36) is sleeved at the center of the transmission disk (34). The transmission disk (34) further comprises a swing crankshaft (37), and the swing crankshaft (37) is provided with a rotating shaft hole. The swing crankshaft (37) is rotatably sleeved on the crankshaft shaft (38). ), the swing crank rod (37) is divided into two sections, one section is a convex arc surface, arranged around the transmission core (36), and the other end is connected to the convex arc surface and is far away from the crank rod shaft (38) and is in the shape of a long straight rod. The rod end can be locked with the inner flange (35) through the rod end. A limiting groove (39) is also provided at the bottom of the positioning plate (31), and the limiting groove (39) is an elliptical through hole. A limiting column is provided on the bottom surface of the swing crank rod (37), and the limiting column is movably sleeved in the limiting groove (39).

2. The anti-seismic and anti-impact expansion screw according to claim 1, characterized in that: The expansion sleeve (1) comprises an insertion inlet (11) and an expansion port (12). The expansion sleeve (1) is a hollow cylindrical sleeve. An expansion sleeve thread is arranged inside the expansion sleeve (1). The insertion inlet (11) is arranged at an end where the screw body unit is inserted, and the expansion port (12) is arranged at an end away from the insertion inlet (11).

3. The anti-seismic and anti-impact expansion screw according to claim 2, characterized in that: It also includes positioning teeth (13), a plurality of the positioning teeth (13) are circumferentially arranged on the expansion opening (12), the positioning teeth (13) are perpendicular to the end surface of the expansion opening (12), the roots of the positioning teeth (13) are connected to the expansion opening (12), the inner wall of one end of the positioning teeth (13) away from the expansion opening (12) is configured to be bendably protruded from the inner wall of the expansion sleeve (1), and after the screw body unit is inserted into the positioning teeth (13), the distal end of the positioning teeth (13) expands and engages with the inner wall of the wall.

4. The anti-seismic and anti-impact expansion screw according to claim 3, characterized in that: The wall of the expansion sleeve (1) is also provided with a flaring groove (14), and four groups of the flaring grooves (14) are provided on one side of the end of the expansion opening (12). The flaring grooves (14) are rectangular parallelepiped through grooves passing through the expansion sleeve (1), and one end of the flaring grooves (14) is connected to the expansion opening (12), and the connection position is between the roots of the positioning teeth (13).

5. The anti-vibration and anti-impact expansion screw according to claim 4, characterized in that: One end of the expansion sleeve (1) is clamped in the building opening, and the expansion groove (14) and the expansion opening (12) expand radially after the inner screw (2) is rotated and inserted. The expansion sleeve (1) is interference-connected with the building opening at one end of the expansion opening (12), and the center column (3) abuts against the bottom of the building opening to provide support and friction for the positioning plate (31).

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