CN112762072A - Quick detachable and repeatedly usable's expansion bolts - Google Patents
Quick detachable and repeatedly usable's expansion bolts Download PDFInfo
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- CN112762072A CN112762072A CN202110165633.8A CN202110165633A CN112762072A CN 112762072 A CN112762072 A CN 112762072A CN 202110165633 A CN202110165633 A CN 202110165633A CN 112762072 A CN112762072 A CN 112762072A
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- expansion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
- F16B13/068—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like expanded in two or more places
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The application provides an easily-detachable and reusable expansion bolt, which comprises a bolt, a sleeve, a conical nut and a second nut, wherein the sleeve comprises an expansion pipe section; the outer surface of the sleeve is provided with an external thread, and the second nut is sleeved on the external thread of the sleeve so as to be used for moving the sleeve towards the outside of the anchoring hole when the second nut is jacked on the wall surface and simultaneously the second nut is rotated; the method comprises the following steps of pre-inclining an inner cavity of a sleeve upwards in the direction from the inside of an anchoring hole to the outside of the anchoring hole, enabling a screw to incline upwards in the direction from the inside of the anchoring hole to the outside of the anchoring hole, and offsetting a part of pressure applied by a suspension; the wall thickness of the upper valve pipe wall of the expansion pipe section is increased in advance, and the wall thickness of the lower valve pipe wall of the outer pipe opening section is increased in advance, so that the two pipe walls become more wear-resistant, fatigue-resistant, aging-resistant, collapse-resistant, softening-resistant, failure-resistant and the like; finally, the performances of the expansion bolt such as load capacity, anchoring strength and safety factor are improved.
Description
Technical Field
The invention relates to the technical field of expansion bolts, in particular to an expansion bolt which is easy to disassemble and can be repeatedly used.
Background
Currently, in building finishing and building installation, an expansion bolt is a special threaded connection fastener used to secure pipes, brackets, hangers, brackets or equipment to a wall, floor or column.
Currently, expansion bolts commonly used include bolts, sleeves, flat washers and tapered nuts, wherein the bolts include a head and a screw integrally connected.
At present, the installation and use process of the expansion bolt is as follows: firstly, drilling an anchoring hole on a wall by using a drill bit, then inserting an expansion bolt assembled together into the anchoring hole on the wall, wherein the bolt and a conical nut form a thread transmission pair, then the conical nut gradually moves towards the outside of the anchoring hole by rotating the bolt (at the moment, the conical nut only moves linearly and does not rotate), the thread transmission pair converts the rotary motion of the bolt into the linear motion of the conical nut, at the moment, a sleeve is fixed, the conical nut gradually moves towards the outside of the anchoring hole until the conical nut is extruded into an expansion pipe section of the sleeve, because the outer diameter of the conical nut gradually increases from outside to inside, the inner diameter of the expansion pipe section is smaller than the maximum outer diameter of the conical nut, and because the pipe wall of the expansion pipe section is divided into a plurality of arc plates, a gap for facilitating expansion is reserved between two adjacent arc plates, the inserted conical nut can extrude and expand the expansion pipe section to increase the outer diameter, the expansion pipe section and the inner wall surface of the anchoring hole in the wall body generate expansion extrusion friction force, the anchoring hole, the sleeved expansion pipe section and the conical nut are extruded and fixed together, and further the conical nut is sleeved and fixed on a screw rod of the bolt through threaded connection, so that the anchoring hole, the sleeved expansion pipe section, the conical nut and the bolt are extruded and fixed together, and the expansion bolt is anchored in the anchoring hole in the wall body.
At present, regarding current expansion bolts, it is more convenient and fast to install expansion bolts for the first time, but dismantle expansion bolts is very difficult, at present usually with great external force hammering expansion bolts's the part that exposes outside the wall body, make it rock about it, multiple hammering finally makes anchor hole, sleeve pipe and cone nut three can loosen each other under the tight state of expanding, waste time and energy, all have the physical damage of certain degree to expansion bolts and wall body, and even if succeed in detaching expansion bolts, because the bolt, sleeve pipe and cone nut are pounded by the hammer and are got into great deformation usually, lead to unable reuse, promptly unable used repeatedly. Therefore, how to make the dismounting of the expansion bolt easier, more convenient and faster, and how to make each part in the dismounted expansion bolt have no larger deformation and damage and can be reused are technical problems that need to be solved by the technical staff in the field at present.
Disclosure of Invention
The invention aims to provide an expansion bolt which is easy to disassemble and can be repeatedly used.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an easily removable and reusable expansion bolt comprising a bolt, a sleeve and a tapered nut;
the bolt comprises a head and a screw rod which are integrally connected, and an external thread is arranged on the outer surface of the screw rod;
the sleeve comprises an outer pipe opening section and an expansion pipe section used for being extruded and expanded, the pipe wall of the expansion pipe section is divided into a plurality of circular arc plates, and a gap used for facilitating expansion is reserved between every two adjacent circular arc plates;
the outer diameter of the outer end of the cone nut is smaller than that of the inner end of the cone nut, and the cone nut is used for being inserted into the expansion pipe section to extrude and expand the expansion pipe section;
the screw rod of the bolt is inserted into the sleeve, the conical nut is arranged on an external thread of the inner section of the screw rod, which is exposed out of the sleeve, through a threaded connecting sleeve, the sleeve is sleeved on the screw rod, and the sleeve is positioned between the head of the bolt and the conical nut, so that the bolt is rotated to enable the conical nut to move towards the outside of the anchoring hole until the conical nut is extruded into the expansion pipe section; the expansion bolt further comprises a second nut;
the outer surface of the pipe wall of the sleeve except the expansion pipe section is provided with an external thread, the second nut is arranged on the external thread on the outer surface of the pipe wall of the sleeve through a threaded connecting sleeve, so that the sleeve moves towards the outer direction of the anchoring hole when the second nut is jacked on the wall surface and simultaneously rotates the second nut.
Preferably, an included angle between an axis of the tube-in-tube cavity in the sleeve and an axis of the sleeve is 0.5 to 15 °, so that when the expansion bolt is inserted into an anchoring hole installed on a wall body and the axis of the sleeve is parallel to a horizontal plane, the axis of the tube-in-tube cavity in the sleeve inclines upwards according to a direction from the anchoring hole to the outside of the anchoring hole, the screw rod further inclines upwards according to a direction from the anchoring hole to the outside of the anchoring hole, the wall thickness of an upper flap tube wall of the expansion tube section is increased, and the wall thickness of a lower flap tube wall of the outer tube mouth section is increased;
at the same time, the midpoint of the inner diameter of the tube interior cavity of the expanded tube section is located below the axis of the casing for causing the wall thickness of the upper lobe wall of the expanded tube section to be greater than the wall thickness of the lower lobe wall of the expanded tube section in a vertical axial cross-section of the casing;
meanwhile, the middle point of the inner diameter of the inner cavity of the outer pipe opening section is located above the axis of the sleeve, so that the wall thickness of the lower valve pipe wall of the outer pipe opening section is larger than that of the upper valve pipe wall of the outer pipe opening section on the vertical axial section of the sleeve.
Preferably, the axis of the tube inner cavity in the sleeve and the axis of the sleeve are on the same plane, and the included angle between the axis of the tube inner cavity in the sleeve and the axis of the sleeve is 1-10 degrees.
Preferably, the outer pipe opening section starts from the outer end face of the sleeve pipe and has a length of 1cm to 3 cm.
Preferably, the largest outer diameter of the cone nut is equal to the outer diameter of the sleeve.
Preferably, the second nut is a hexagonal nut.
Drawings
Fig. 1 is a schematic cross-sectional view of a vertical axial section of a quick-release and reusable expansion bolt according to an embodiment of the present invention;
fig. 2a is a schematic cross-sectional view of a vertical axial section of a sleeve and a second nut of a quick-release and reusable expansion bolt according to another embodiment of the present invention (in fig. 2a, the axis of the hollow cavity in the sleeve and the axis of the sleeve form an included angle of 2 °);
FIG. 2b is a schematic cross-sectional view in vertical axial section of a bolt and a conical nut for use with the sleeve and second nut of FIG. 2a (the bolt in FIG. 2b is stainless steel);
FIG. 3 is a schematic cross-sectional view of FIG. 2a with the addition of an angle between the axis of the lumen in the cannula and the axis of the cannula (in FIG. 3, the angle between the axis of the lumen in the cannula and the axis of the cannula is 2 °);
FIG. 4 is a schematic representation of the working principle of a quick release and reusable expansion bolt assembled from FIGS. 2a and 2b (vertical axial cross-section of the expansion bolt in FIG. 4);
in the figure: 1, a sleeve, 101 an outer pipe opening section, 1011 a lower valve pipe wall of the outer pipe opening section, and 1012 an upper valve pipe wall of the outer pipe opening section;
102 expanding the tubular segment, 1021 expanding the upper valve wall of the tubular segment, 1022 expanding the lower valve wall of the tubular segment;
103 the lumen of the tube in the sleeve, 104 the axis of the lumen of the tube in the sleeve, 105 the axis of the sleeve, 106 the gap between two adjacent circular arc plates for facilitating expansion, 107 the oblique rotation point of the screw (the fulcrum of the lever formed by the screw);
3 bolt, 301 head of bolt, 302 screw;
4 taper nut, 5 second nut;
6 wall body, 601 anchorage hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "axial," "radial," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "upper," "lower," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated based on actual usage, merely to facilitate description of the invention and to simplify description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, it should be understood that the terms "inner", "outer", "horizontal direction" and "vertical direction" indicate the orientation or positional relationship that the direction inside the anchoring hole is "inner" and the direction outside the anchoring hole is "outer" based on the orientation or positional relationship in actual use; the above directional definitions are provided merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second", may explicitly or implicitly include one or more of the features.
In the present invention, unless otherwise expressly stated or limited, the first feature being "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 to 4, in the drawings: the structure comprises a sleeve 1, an outer orifice section 101, a lower valve pipe wall 1011 of the outer orifice section 101, and an upper valve pipe wall 1012 of the outer orifice section 101; the expansion spool piece 102, the upper lobe wall 1021 of the expansion spool piece 102, the lower lobe wall 1022 of the expansion spool piece 102; an inner cavity 103 in the sleeve 1, an axis 104 of the inner cavity 103 in the sleeve 1, an axis 105 of the sleeve 1, a gap 106 between two adjacent circular arc plates for facilitating expansion, and an inclined rotating point 107 of the screw 302 (a fulcrum of a lever formed by the screw 302); bolt 3, head 301 of bolt 3, screw 302; a taper nut 4, a second nut 5; wall 6, anchor hole 601.
At present, in the process of installing the expansion bolt, because the bolt 3 and the conical nut 4 form a thread transmission pair, the head 301 of the bolt 3 is rotated, the screw 302 of the bolt 3 is rotated, and the conical nut 4 is gradually moved outwards of the anchoring hole (at this time, the conical nut 4 only moves in a straight line and does not rotate), the thread transmission pair converts the rotary motion of the bolt 3 into the straight line motion of the conical nut 4, and at this time, the sleeve 1 is fixed (neither moves nor rotates), so that a motion process is generated, a motion participant is a wall surface which cannot be ignored, only the head 301 of the bolt 3 rotates against the wall surface, so that the conical nut 4 can move outwards of the anchoring hole, when the head 301 of the bolt 3 does not rotate against the wall surface, the conical nut 4 is fixed (at this time, the bolt 3 only idles), namely, the installation process of the expansion bolt takes advantage of the force of the wall surface, namely the idea and thought of "borrowing power".
In order to solve the technical problems and realize the easy disassembly and the repeated use of the expansion bolt, the expansion bolt has the same idea and thought of the 'borrowing force' of the expansion bolt in the installation process, and the expansion bolt is easy to disassemble and can be repeatedly used and comprises a bolt 3, a sleeve 1 and a conical nut 4;
the bolt 3 comprises a head 301 and a screw 302 which are integrally connected, and the outer surface of the screw 302 is provided with an external thread;
the casing 1 comprises an outer pipe opening section 101 and an expansion pipe section 102 used for being extruded and expanded, wherein the pipe wall of the expansion pipe section 102 is divided into a plurality of circular arc plates, and a gap 106 used for facilitating expansion is reserved between every two adjacent circular arc plates;
the outer end of the cone nut 4 has an outer diameter smaller than the outer diameter of the inner end of the cone nut 4, the cone nut 4 being adapted to be inserted into the expanded tubular segment 102 to compressively expand the expanded tubular segment 102;
a screw 302 of the bolt 3 is inserted into the sleeve 1, the cone nut 4 is sleeved on an external thread of an inner section of the screw 302 exposed outside the sleeve 1 through threaded connection, the sleeve 1 is sleeved on the screw 302 and the sleeve 1 is positioned between a head 301 of the bolt 3 and the cone nut 4, so that the bolt 3 is rotated to enable the cone nut 4 to move outwards of the anchoring hole until the cone nut 4 is extruded into the expansion pipe section 102; the expansion bolt further comprises a second nut 5;
the outer surface of the pipe wall of the casing 1 except the expanded pipe section 102 is provided with an external thread, and the second nut 5 is connected to the external thread on the outer surface of the pipe wall of the casing 1 through a threaded connection sleeve, so that when the second nut 5 is pressed against the wall surface and the second nut 5 is rotated at the same time, the casing 1 moves towards the outside of the anchoring hole.
The removal process of the expansion bolt is generally as follows: since the expansion pipe section 102 of the casing 1 and the conical nut 4 are pressed and fixed after the expansion bolt is installed in the anchoring hole 601 of the wall 6, at this time, the bolt 3 is firstly rotated reversely, so that the bolt 3 gradually moves outwards from the anchoring hole until the screw 302 of the bolt 3 is disconnected from the conical nut 4, at this time, the bolt 3 is pulled out of the casing 1 and the flat washer and the hanging object on the expansion bolt are removed;
then finding a steel rod, wherein the outer diameter of the steel rod is smaller than the inner diameter of the sleeve and larger than the minimum outer diameter of the conical nut 4, then extending the steel rod into the sleeve 1, enabling the inner end of the steel rod to be abutted against the outer end of the conical nut 4, then hammering the outer end of the steel rod exposed out of the sleeve 1 by using a hammer to enable the conical nut 4 to move towards the inner direction of the anchoring hole until the conical nut moves to the bottom of the anchoring hole, namely separating the conical nut 4 from the expansion pipe section 102 by hammering the steel rod;
then, the second nut 5 is rotated by a wrench, the second nut 5 is rotated (preferably rotated rightwards) by the wrench while being abutted against the wall surface, and as the external thread (preferably right-handed thread) on the outer surface of the pipe wall of the sleeve 1 and the internal thread of the second nut 5 form a thread transmission pair, the sleeve 1 moves out of the anchoring hole when the second nut 5 is abutted against the wall surface and is rotated rightwards;
in the process that the sleeve 1 moves to the outside of the anchoring hole, the expansion pipe section 102 is pressed by the inner wall surface of the anchoring hole 601, so that the expanded and thickened outer diameter of the expansion pipe section 102 is gradually reduced, and the expansion pipe section 102 is gradually changed into a gap with the inner wall surface of the anchoring hole 601 from a state of being pressed and clamped with the inner wall surface of the anchoring hole 601;
when the expanded and thickened outer diameter of the expanded pipe section 102 is gradually reduced until a gap is formed between the expanded and thickened outer diameter and the inner wall surface of the anchoring hole 601, the sleeve 1 is not limited by the blocking of the inner wall surface of the anchoring hole 601 any more, at the moment, the second nut 5 can not be rotated any more, and the sleeve 1 can be completely pulled out of the anchoring hole 601 by directly clamping the outer end of the sleeve 1 by using pliers;
then, the cone nut 4 is taken out of the anchoring hole 601 by using tweezers, and thus, the detachment of the expansion bolt is completed.
According to the above-mentioned whole process of disassembling the expansion bolt, it can be obtained that: 1) compared with the disassembly of the expansion bolt in the prior art, the disassembly of the expansion bolt in the application is easier, more convenient and faster due to the fact that the thread transmission pair between the second nut and the sleeve and the force of the wall surface are matched, the input force can be amplified by times and then output, for example, a person can easily lift a plurality of tons of heavy automobiles by shaking the screw jack with one hand, and therefore the thread transmission pair in the application can easily pull the sleeve out of the anchoring hole, and the disassembly of the expansion bolt in the application is skillfully easier, more convenient and faster; 2) compared with the disassembly of the expansion bolt in the prior art, the bolt 3 is not subjected to violent hammering in the application, the sleeve 1 is not subjected to violent hammering in the application, the steel rod is hammered by a hammer only in the application, and then the cone nut 4 moves towards the anchoring hole until the cone nut is separated from the expansion pipe section 102, the cone nut 4 basically cannot deform due to the fact that hammering force is not large, namely, all parts in the expansion bolt disassembled in the application are not greatly deformed and damaged, the sleeve 1 disassembled is repaired by a tool and then is recovered to the original outer diameter to be reused, so that all parts in the expansion bolt disassembled in the application, such as the bolt 3, the sleeve 1, the cone nut 4 and the second nut 5, are not greatly deformed and damaged and can be assembled again for reuse, the material can be repeatedly used for many times, and the repeated utilization rate is high; in conclusion, the innovation point of the application lies in that according to the thought and thought of "borrowing force", the force of the wall surface is reasonably and skillfully borrowed, the second nut 5 rotates while being abutted against the wall surface, and then the sleeve 1 moves towards the outside of the anchoring hole through the thread transmission pair formed by the second nut 5 and the sleeve 1, so that the expansion pipe section 102 gradually changes from the state of being squeezed and clamped with the inner wall surface of the anchoring hole 601 to the state of being separated from the inner wall surface of the anchoring hole 601 until a gap is formed between the expansion pipe section and the inner wall surface of the anchoring hole 601, and finally the sleeve 1 is taken out of the anchoring hole 601 completely without causing obvious deformation and damage to the sleeve 1, thereby realizing easy disassembly and repeated use of the expansion bolt.
In this application, for preventing 5 in-process second nuts 5 that push up rotation on the wall cause the extrusion to destroy on the wall on the limit of second nut, and for the area of contact between increase second nut 5 and the wall, still the cover is equipped with the plain washer on sleeve pipe 1, the plain washer is located between second nut 5 and the wall.
At present, along with the development of economic society and the progress of science and technology, the performance of the existing expansion bolt can not meet the use requirements of building decoration and building installation on the expansion bolt. Therefore, how to improve the performances of the expansion bolt, such as load-carrying capacity, anchoring strength, safety factor, service life, durability, weather resistance, and use stability, and prevent the expansion bolt from loosening and failing due to external force, vibration, fatigue, and the like, is a technical problem that needs to be solved by those skilled in the art.
To this end, the present application provides a quick-release and reusable expansion bolt, the axis 104 of the cavity 103 in the casing 1 and the axis 105 of the casing 1 form an angle of 0.5 to 15 degrees, for when the expansion bolt is inserted into the anchoring hole 601 installed on the wall body 6 and the axis 105 of the sleeve 1 is parallel to the horizontal plane (i.e. when the sleeve 1 is inserted into the anchoring hole 601 installed on the wall body 6 in a horizontal posture), the axis 104 of the lumen 103 in the sleeve 1 is inclined upwardly in the direction from inside the anchoring hole to outside the anchoring hole, the lumen 103 in the sleeve 1 is inclined upward in the direction from inside the anchoring hole to outside the anchoring hole, further causing the threaded rod 302 to be inclined upward in the direction from inside the anchoring hole to outside the anchoring hole, and for increasing the wall thickness of the upper lobe wall 1021 of the expanded tubular section 102 and for increasing the wall thickness of the lower lobe wall 1011 of the outer tubular port section 101;
at the same time, the midpoint of the inner diameter of the tubular cavity 103 of the expanded tubular segment 102 is located below the axis 105 of the casing 1 for making the wall thickness of the upper lobe wall 1021 of the expanded tubular segment 102 greater than the wall thickness of the lower lobe wall 1022 of the expanded tubular segment 102 in a vertical axial cross-section of the casing 1;
at the same time, the center point of the inner diameter of the tube interior cavity 103 of the outer tube mouth section 101 is located above the axis 105 of the sleeve 1, in order to make the wall thickness of the lower lobe wall 1011 of the outer tube mouth section 101 greater than the wall thickness of the upper lobe wall 1012 of the outer tube mouth section 101 in a vertical axial section of the sleeve 1.
In one embodiment of the present application, the axis 104 of the tube cavity 103 in the sleeve 1 is in the same plane as the axis 105 of the sleeve 1, and the angle between the axis 104 of the tube cavity 103 in the sleeve 1 and the axis 105 of the sleeve 1 is 1-10 °.
In one embodiment of the present application, the outer nozzle section 101 is from the outer end surface of the sleeve 1 and the length of the outer nozzle section 101 is 1cm to 3 cm.
In one embodiment of the application, the largest outer diameter of the cone nut 4 is equal to the outer diameter of the sleeve 1.
In one embodiment of the present application, the second nut 5 is a hexagonal nut.
In the present application, when the axis of the sleeve is parallel to the horizontal plane, the axis of the hollow cavity in the sleeve inclines upward from the inside of the anchoring hole to the outside of the anchoring hole, and the axis of the hollow cavity in the sleeve and the axis of the sleeve are on the same vertical plane (as shown in fig. 3), the vertical plane where the axis of the hollow cavity in the sleeve and the axis of the sleeve together are defined as a vertical plane a, at this time, the sleeve is cut into two upper and lower lobes along a plane perpendicular to the vertical plane a and coinciding with the axis of the hollow cavity in the sleeve, so that the expansion pipe section 102 is cut into two upper and lower lobes, respectively, the upper lobe wall 1021 of the expansion pipe section 102 and the lower lobe wall 1022 of the expansion pipe section 102 are cut, so that the outer mouth section 101 is also cut into two upper and lower lobes, respectively a lower lobe tube wall 1011 of the outer mouth section 101 and an upper lobe tube wall 1012 of the outer mouth section 101.
In this application, the casing 1 is a circular tube, and the inner cavity 103 of the casing 1 is a cylindrical cavity.
In the prior art, the maximum outer diameter (hereinafter, simply referred to as the maximum outer diameter d) of the portion of the expansion bolt inserted into the anchor hole 601, which is combined together but has not been compression-expanded, is equivalent to the outer diameter of the sleeve 1;
in the present application, since the tube inner cavity 103 in the sleeve 1 is inclined upward in the direction from the inside of the anchor hole to the outside of the anchor hole, and the screw 302 is inclined upward in the direction from the inside of the anchor hole to the outside of the anchor hole, which results in that the maximum outer diameter d is slightly larger than the outer diameter of the sleeve 1, when drilling the anchor hole 601, the inner diameter of the anchor hole 601 needs to be correspondingly enlarged, and theoretically, the inner diameter of the anchor hole 601 is equal to the maximum outer diameter d;
because the maximum outer diameter of the conical nut 4 is equal to the outer diameter of the casing 1, in practice, the expandable thickening range of the expanded pipe segment 102 is the sum of the wall thicknesses of the upper and lower pipe walls of the expanded pipe segment 102, and in view of the fact that the inner diameter of the anchoring hole 601 needs to be expanded a little, at this time, the expandable thickening range of the expanded pipe segment 102 needs to be expanded a little, so that the sum of the wall thickness of the upper valve pipe wall 1021 of the expanded pipe segment 102 and the wall thickness of the lower valve pipe wall 1022 of the expanded pipe segment 102 is increased, so that the outer diameter of the expanded pipe segment 102 after being extruded and expanded is larger, that is, the expanded pipe segment 102 can be in extrusion contact with the anchoring hole 601 with the enlarged inner diameter after being extruded and expanded, thereby solving the problem that the maximum outer diameter d is slightly larger than the;
the outer diameter of the expansion pipe section 102 is expanded by the taper nut 4 by 0.5 mm-5 mm, which is enough to press and fix the anchor hole 601, the expansion pipe section 102 of the casing 1 and the taper nut 4 together.
At present, a concept and thought of "pre" is more and more popular in scientific and technological development and engineering application, such as a prestressed concrete structure, wherein a prestressed concrete structure is formed by artificially applying pressure to a structural member before the structural member is subjected to an external load, so that a generated prestressed state is used for reducing or offsetting tensile stress caused by the external load, namely, the defect of tensile strength of the concrete is made up by the aid of higher compressive strength of the concrete, and the purpose of delaying the cracking of the concrete in a tensile area is achieved, namely, the damage tendency is artificially reversed after the damage tendency is known, namely, a preparation is made in advance or more preparations are made at a weak part;
in the prior art, after the expansion bolts are installed in the horizontal anchoring holes 601 on the wall body 6, the outer wall section of the screw 302 exposed outside the wall body 6 is to hang heavier objects such as guard rails, anti-theft doors and windows, rain sheds, air conditioner outer frames, pipeline brackets and the like, so that the outer wall section of the screw 302 bears the guard rails, the anti-theft doors and windows, the rain sheds and the likeThe mass of the outer frame of the air conditioner, the pipe bracket, etc. (hereinafter, referred to as the suspension), the outer wall of the screw 302 is pressed downward by the suspensionHanging articleThis downward pressure FHanging articleIs basically not reduced, and if other objects are subsequently hung on the objects such as guard rails, anti-theft doors and windows, rain sheds, air conditioner outer frames, pipeline supports and the like, downward pressure F is causedHanging articleBecomes greater and therefore this downward pressure FHanging articleThe outer wall of the screw 302 is continuously pressed to make the outer wall of the screw 302 gradually incline downwards, and then the screw 302 is not bent due to the higher strength and rigidity of the screw 302, so the screw 302 forms a lever structure with the lowest point of the inner diameter pipe orifice edge on the outer end of the sleeve 1 as a fulcrum, according to the lever principle, when the lever is in a balanced state, the power x the power arm is equal to the resistance x the resistance arm, and the downward pressure F exerted by the suspension is used at the positionHanging articleAs the power of the screw 302, the downward pressure of the upper hole wall of the anchoring hole 601 to the inner end of the screw 302 (the inner end of the lever) is used as the resistance of the lever; when the pressure F isHanging articleThe outer wall section (equivalent to the outer section of the lever) pressing the screw 302 is gradually inclined downward, which naturally causes the inner wall section (equivalent to the inner section of the lever) of the screw 302 located in the anchoring hole 601 to be gradually inclined upward; i.e. downward pressure F exerted by the suspensionHanging articleSo that the outer wall section of the screw 302 is gradually inclined downward and the inner wall section of the screw 302 is gradually inclined upward, i.e. the downward pressure F exerted by the suspensionHanging articleSo that the screw 302 is inclined downwards in the direction from the inside of the anchoring hole to the outside of the anchoring hole, and the inclined rotating point 107 of the screw 302 is the lowest point of the inner diameter pipe orifice edge on the outer end of the sleeve 1;
in the prior art, when the outer wall section of the screw 302 is inclined downwards and the inner wall section of the screw 302 is inclined upwards, because the screw 302 and the sleeve 1 are connected together and integrated by virtue of expansion and extrusion friction force, the inclination of the screw 302 can drive the sleeve 1 to incline synchronously and in the same direction, namely, the inner wall section of the sleeve 1 in the anchoring hole 601 is inclined upwards according to the direction from the outside of the anchoring hole to the inside of the anchoring hole;
in the prior art, because the expanded pipe section 102 is located on the inner end of the casing 1 and near the bottom of the anchoring hole 601, the expanded pipe section 102 is inclined upward along with the wall inner section of the casing 1 in the direction from the outside of the anchoring hole to the inside of the anchoring hole;
in the prior art, after the expanded tubular segment 102 is pressed, expanded and anchored by the taper nut 4, the taper nut 4 applies an upward pressure F to the upper valve wall 1021 of the expanded tubular segment 102Inner upperThe cone nut 4 will apply a downward pressure F to the valve wall 1022 of the expanded tubular segment 102Inner lower partInitially F is due to the non-inclined horizontal attitude of both the screw 302 and the expanded tubular section 102Inner upperIs equal to FInner lower part(ii) a However, when the screw 302 forms a lever structure with the lowest point of the inner diameter nozzle edge on the outer end of the casing 1 as the fulcrum, the downward pressure F exerted by the suspension is based on the lever principleHanging articleThe principle that the power of the outer end of the lever, which is the screw 302, is converted into the upward pressure applied to the upper valve pipe wall 1021 of the expansion pipe section 102 by the inner end of the screw 302 after the lever is converted is the same as that a person holds the lever to pry a large stone, the person presses the outer end of the lever with force, and meanwhile, the inner end of the lever can apply an upward force to the large stone to jack the large stone, so that the downward pressure F applied by the suspension isHanging articleMake F by the principle of leverageInner upperBecomes larger, i.e. F, after the expanded pipe section 102 is tilted upwardInner upperIs no longer equal to FInner lower partThe upper valve wall 1021 of the expanded tubular segment 102 is subjected to a greater compressive or pinching force than the lower valve wall 1022 of the expanded tubular segment 102, i.e., F, when the expanded tubular segment 102 is tilted upwardInner upperGreater than FInner lower part；
In the prior art, since the upper valve wall 1021 of the expansion pipe section 102 is subjected to a greater pressure than the lower valve wall 1022 of the expansion pipe section 102, the upper valve wall 1021 of the expansion pipe section 102 is more prone to wear, fatigue, aging, collapse, softening, failure and the like than the lower valve wall 1022 of the expansion pipe section 102, once the upper valve wall 1021 of the expansion pipe section 102 is worn, fatigued, aged, collapsed, softened, failed and the like, the anchoring hole 601, the expansion pipe section 102 of the casing 1 and the taper nut 4 are separated from each other, and the three are no longer fixed together by pressing, so that the anchoring effect of expansion pressing fails, and therefore the upper valve wall 1021 of the expansion pipe section 102 is a limp leg and a weak point of the expansion pipe section 102;
in the prior art, similarly to a balance, the balance is also a lever, and when 1kg of rice is weighed by the balance, when a weight of 1Kg is placed on the right tray of the balance and rice of 1Kg is placed on the left tray of the balance, the balance is in a lever balance state, and the balance bearing the weight of 1Kg and the rice of 1Kg is the fulcrum of the balance (fulcrum of the lever), so that, although the power and the resistance force enable the lever to realize a balanced state, finally, the downward power and the downward resistance force are supported and carried by the fulcrum, i.e. the fulcrum of the lever bears two forces (the sum of the downward power and the downward resistance), a lever structure is formed according to the above-mentioned screw 302 with the lowest point of the inner diameter nozzle rim on the outer end of the sleeve 1 as the fulcrum, the lowest point of the inner diameter nozzle rim on the outer end of the sleeve 1 as a fulcrum thus also carries two forces (F).Hanging articleAs power and the upper hole wall of the anchoring hole 601 will give a downward pressure to the inner end of the screw 302 as resistance), so the lower valve tube wall 1011 of the outer tube mouth section 101 where the fulcrum is located also bears two downward pressures, and the pressure is large;
in the prior art, once the lower valve tube wall 1011 of the outer tube mouth section 101 is worn, fatigued, aged, collapsed, softened, and failed, the huge pressure causes the lower valve tube wall 1011 of the outer tube mouth section 101 to be more easily worn, fatigued, aged, collapsed, softened, and failed, and as the middle strut of a balance is suddenly bent or crushed in the process of weighing the mass, the situation is equal to that the fulcrum in the lever structure is crushed or crushed, the screw 302 cannot form a lever structure and cannot form a lever-type balanced stress system, and the expansion bolt and the screw 302 thereof are easily loosened and failed due to external force, vibration, fatigue, and the like, so the lower valve tube wall 1011 of the outer tube mouth section 101 is the crippling leg and the weak point of the outer tube mouth section 101;
for this reason, according to the above "after knowing bad trendsIn the idea of artificially preventing the bad trend, the included angle between the axis 104 of the inner cavity 103 of the casing 1 and the axis 105 of the casing 1 is 0.5-15 degrees, for when the expansion bolt is inserted into the anchoring hole 601 installed on the wall body 6 and the axis 105 of the sleeve 1 is parallel to the horizontal plane (i.e. when the sleeve 1 is inserted into the anchoring hole 601 installed on the wall body 6 in a horizontal posture), the axis 104 of the lumen 103 in the sleeve 1 is inclined upwardly in the direction from inside the anchoring hole to outside the anchoring hole, the lumen 103 in the sleeve 1 is inclined upward in the direction from inside the anchoring hole to outside the anchoring hole, further causing the threaded rod 302 to be inclined upward in the direction from inside the anchoring hole to outside the anchoring hole, so that the screw 302 is previously brought into an upwardly inclined posture from the inside to the outside to cancel the above downward pressing force F.Hanging articleSo that the screw 302 is previously brought into an upwardly inclined posture from the inside to the outside in advance to cancel the above downward pressing force FHanging articleThe tendency of the screw 302 to tilt downward from inside to outside is forced such that the outer wall section of the screw 302 is pre-pitched upward and the inner wall section of the screw 302 is pre-pitched downward to counteract the downward pressure F exerted by the suspensionHanging articleThe tendency of the outer wall section of the shank 302 to slope gradually downward and the inner wall section of the shank 302 to slope gradually upward, allows the expansion bolt and its shank 302 in the present application to take on a heavier suspension, compared with the expansion bolt with the same specification, the load-carrying capacity of the expansion bolt is improved by 20-300 percent, and the expansion bolt and the screw 302 thereof have higher anchoring strength, safety factor, service life, durability, weather resistance, use stability and other performances under the same load, the larger the inclination angle of the pipe inner cavity 103 and the screw 302 in the sleeve 1 which incline upwards in the direction from the inside of the anchoring hole to the outside of the anchoring hole is, the larger the load-carrying capacity of the expansion bolt and the screw 302 thereof is, and the higher the anchoring strength, safety factor, service life, durability, weather resistance, use stability and other performances of the expansion bolt and the screw 302 thereof are; the principle is similar to that of the prestressed concrete beam in the prestressed concrete structure, and when the prestressed concrete beam and the non-prestressed concrete beam are subjected to downward pressure, the prestressed concrete beam and the non-prestressed concrete beam are both pressed to bend downwardsThe prestressed concrete beam is bent into a concave shape, namely downward pressure gives the concrete beam a downward bending and downward sinking tendency, before the prestressed concrete beam is subjected to the downward pressure, the tensioned and lengthened steel bars laid in the prestressed concrete beam can generate a restoring force for restoring the original length, the restoring force can press the prestressed concrete beam to enable the prestressed concrete beam to be changed into an upward convex arch in advance, and the preset arch is utilized to counteract the received downward external pressure and the downward sinking tendency, so that the upper limit external pressure endured by the prestressed concrete beam is more than 3 times of the upper limit external pressure endured by the non-prestressed concrete beam;
and further, according to the above-mentioned concept of "preparing in advance or preparing more in a weak place", the present application designs that the axis 104 of the tubular cavity 103 in the casing 1 and the axis 105 of the casing 1 form an angle of 0.5 ° to 15 ° for increasing the wall thickness of the upper valve wall 1021 of the expanded tubular section 102 to be greater than the wall thickness of the lower valve wall 1021 of the expanded tubular section 102 in the vertical axial section of the casing 1 when the expansion bolt is inserted into the anchoring hole 601 installed on the wall 6 and the axis 105 of the casing 1 is parallel to the horizontal plane, the axis 104 of the tubular cavity 103 in the casing 1 is inclined upward in the direction from the anchoring hole to the outside of the anchoring hole, the tubular cavity 103 in the casing 1 is inclined upward in the direction from the anchoring hole to the outside of the anchoring hole for increasing the wall thickness of the upper valve wall 1021 of the expanded tubular section 102 in the vertical axial section of the casing 1 1022, this design increases the wall thickness of the upper flap wall of the expanded pipe section 102, previously increases the wall thickness of the upper flap wall of the expanded pipe section 102, and the thicker wall thickness of the upper flap wall 1021 of the expanded pipe section 102 means that the upper flap wall 1021 of the expanded pipe section 102 has higher strength and better wear resistance, and so on, and the emphasis reinforcement enables the upper flap wall 1021 of the expanded pipe section 102 to withstand higher pressure, that is, the emphasis reinforcement is prepared in advance at the weak point, so that the upper flap wall 1021 of the expanded pipe section 102 becomes more wear-resistant, fatigue-resistant, aging-resistant, collapse-resistant, softening-resistant, failure-resistant, and so on, which is similar to the men's elbow patch shirt in principle, and it is known in advance that the elbows of men's often rub against the table top, and are worn out more quickly and earlier than other parts of the shirt, therefore, a layer of cloth is additionally added to the elbows of the boy shirt in advance to form elbow patches, so that the elbows of the shirt are thicker and the emphasis is strengthened, and therefore the elbows of the shirt are more wear-resistant;
and further, according to the above-mentioned concept of "preparing in advance or preparing more in a weak place", the present application designs that the axis 104 of the tubular cavity 103 in the sleeve 1 and the axis 105 of the sleeve 1 form an angle of 0.5 ° to 15 ° for the axis 104 of the tubular cavity 103 in the sleeve 1 to be inclined upward in a direction from inside to outside of the anchoring hole when the expansion bolt is inserted into the anchoring hole 601 installed on the wall body 6 and the axis 105 of the sleeve 1 is parallel to the horizontal plane, the tubular cavity 103 in the sleeve 1 to be inclined upward in a direction from inside to outside of the anchoring hole and for increasing the wall thickness of the lower valve wall of the outer valve section, and the midpoint of the inner diameter of the tubular cavity 103 of the outer valve section 101 is located above the axis 105 of the sleeve 1 for making the wall thickness of the lower valve wall 1011 of the outer valve section 101 larger than the wall thickness of the upper valve wall of the outer valve section 101 in the vertical axial section of the sleeve 1 The wall 1012 has a wall thickness, and this design increases the wall thickness of the lower flap pipe wall of the outer mouth section 101, and increases the wall thickness of the lower flap pipe wall of the outer mouth section 101 in advance, and the thicker wall thickness of the lower flap pipe wall 1011 of the outer mouth section 101 means that the lower flap pipe wall 1011 of the outer mouth section 101 has higher strength and better wear resistance, and so on, and the emphasis reinforcement enables the lower flap pipe wall 1011 of the outer mouth section 101 to withstand higher pressure, i.e. the emphasis reinforcement is made in advance at the weak point, so that the lower flap pipe wall 1011 of the outer mouth section 101 becomes more wear-resistant, more fatigue-resistant, more aging-resistant, more collapse-resistant, more softening-resistant, more failure-resistant, and so on, and the principle is similar to that of an elbow patch shirt for boy men, knowing that a shirt often has more friction with a table top, and is worn and broken more quickly than other parts of an elbow, therefore, a layer of cloth is additionally added to the elbows of the boy shirt in advance to form elbow patches, so that the elbows of the shirt are thicker and the emphasis is strengthened, and therefore the elbows of the shirt are more wear-resistant;
in summary, the present application is based on the idea of "artificially reversing the bad tendency after knowing the bad tendency", wherein the hollow 103 in the casing 1 is set to be an eccentrically inclined hollow, the hollow 103 in the casing 1 is inclined upward in the direction from the inside of the anchor hole to the outside of the anchor hole, and the screw 302 is inclined upward in the direction from the inside of the anchor hole to the outside of the anchor hole, so as to cancel the downward pressure F applied by the suspensionHanging articleThe expansion bolt and the screw 302 thereof are improved in the performances such as load capacity, anchoring strength, safety factor, service life, durability, weather resistance and use stability by pressing a part of the trend that the screw 302 inclines downwards from inside to outside;
further, according to the idea of "preparing in advance at the weak point or preparing more than one time", the tube inner cavity 103 in the casing 1 is inclined upward in advance in the direction from the inside of the anchoring hole to the outside of the anchoring hole, so that the wall thickness of the upper valve tube wall 1021 of the expanded tube section 102 is larger, the emphasis on reinforcement enables the upper valve tube wall 1021 of the expanded tube section 102 to withstand larger pressure, and the upper valve tube wall 1021 of the expanded tube section 102 becomes more wear-resistant, more fatigue-resistant, more aging-resistant, more collapse-resistant, more softening-resistant, more failure-resistant, and the like;
further, according to the idea of "preparing in advance at the weak point or preparing more than one time", the tube inner cavity 103 in the sleeve 1 is inclined upward in advance according to the direction from inside the anchoring hole to outside the anchoring hole, so that the wall thickness of the lower flap tube wall 1011 of the outer tube port section 101 is larger, the lower flap tube wall 1011 of the outer tube port section 101 can bear larger pressure due to the important reinforcement, and the lower flap tube wall 1011 of the outer tube port section 101 becomes more wear-resistant, more fatigue-resistant, more aging-resistant, more collapse-resistant, more softening-resistant, more failure-resistant, and the like;
that is, the design of inclining the tube inner cavity 103 in the sleeve 1 upwards from the anchoring hole to the outside of the anchoring hole is achieved, one thing is achieved, firstly, the screw 302 is inclined upwards from the anchoring hole to the outside, secondly, the wall thickness of the upper valve tube wall 1021 of the expansion tube section 102 is made thicker, thirdly, the wall thickness of the lower valve tube wall 1011 of the outer tube mouth section 101 is made thicker, namely, the technical scheme simultaneously solves three technical problems and simultaneously obtains three beneficial technical effects, one 'pre' thought and idea simultaneously solves the three technical problems and simultaneously obtains three beneficial technical effects, finally, the load capacity, the anchoring strength, the safety factor, the service life, the durability, the weather resistance, the use stability and other performances of the expansion bolt and the screw 302 thereof are improved, and the expansion bolt and the screw 302 thereof are prevented from being subjected to external force, Loosening and failure caused by vibration, fatigue and the like.
For the present application, the following problems are explained:
1) in the present application, the wall thickness of the upper lobe wall 1021 of the expansion pipe section 102 is increased in advance, and the wall thickness of the lower lobe wall 1011 of the outer pipe opening section 101 is increased in advance, but some suggestions may be made that the strength, wear resistance and other properties of the upper lobe wall 1021 of the expansion pipe section 102 and the lower lobe wall 1011 of the outer pipe opening section 101 can be improved by directly designing the wall thickness of the entire pipe wall of the casing 1 to be larger, and the technical solution proposed by the suggestions is indeed feasible, but the present application is directed to solving the technical problem in the lateral direction, and is directed to improving the properties of the expansion bolt and the bolt 302 thereof, such as load capacity, anchoring strength, safety factor, service life, durability, weather resistance and use stability without increasing the outer diameter of the casing 1 and the outer diameter of the bolt 302, and is directed to improving the properties of the expansion bolt in the present application, such as load capacity and the like in the expansion, instead of solving the problem longitudinally from high level to low level, the problem is solved in a dimensionality reduction striking manner, like a primary school mathematic problem, a teacher tries to educate primary school students so that the primary school students finally learn and can finally solve the mathematic problem independently, and a college student is not sent to solve the mathematic problem;
2) for the purposes of this application, the pre-control screw 302 is initially in the direction from inside the anchor hole to outside the anchor holeThe upward inclination may be considered in some cases to make the anchoring hole into an inclined hole inclined downward from outside to inside directly at the time of drilling the anchoring hole, so that the screw 302 is initially inclined upward in the direction from the inside of the anchoring hole to the outside of the anchoring hole, and the downward pressure F applied by the suspension can be offsetHanging articleThe screw 302 is pressed to incline downwards from inside to outside, and the technical proposal proposed by the suggestion is feasible;
however, drilling the anchoring hole into an inclined hole inclined downwards from outside to inside belongs to the change of a mounting method, the expansion bolt does not have any structural change, and the mounting method of the expansion bolt and the structure of the expansion bolt are two innovation points with different side points;
moreover, when the expansion bolt in the application is installed, the anchoring hole can be drilled into an inclined hole which is inclined downwards from outside to inside, namely the inclination of the expansion bolt structure in the application and the inclination of the anchoring hole are not contradictory to each other, and conversely, the combination of the inclination of the expansion bolt structure in the application and the inclination of the anchoring hole can also generate a strong combination effect;
furthermore, drilling the anchoring hole into an inclined hole inclined downward from outside to inside can only solve the problem that the pre-control screw 302 is inclined upward from inside to outside of the anchoring hole at the beginning, but cannot increase the wall thickness of the upper valve tube wall 1021 of the expansion tube section 102 and cannot increase the wall thickness of the lower valve tube wall 1011 of the outer tube mouth section 101 in advance, that is, drilling the anchoring hole into an inclined hole inclined downward from outside to inside can only solve one technical problem and obtain one technical effect, but cannot solve three technical problems and simultaneously obtain three beneficial technical effects like the application;
in conclusion 2), the technical scheme of the application is substantially different from the technical scheme that the anchoring hole is punched into the inclined hole which is inclined downwards from outside to inside in advance;
3) for the technical problem of the present application, in which the downward pressure F is exerted by the suspensionHanging articleIs the pressure within the bearable range of the screw 302, so the technical problem of the present application is mainly: under the downward pressure F exerted by the suspensionHanging articleOn the premise that the screw 302 can bear pressure within a range, the performances of the expansion bolt such as load capacity, anchoring strength, safety factor, service life, durability, weather resistance, use stability and the like are improved, and the pressure F is preventedHanging articleOver the years, the outer wall section of the screw 302 is pressed so that the screw 302 gradually inclines downwards and finally slips out of the anchoring hole 601; thus, as to the downward pressure F exerted by the suspensionHanging articleIt is beyond the scope of the technical problem that the present application intends to solve by directly bending the screw 302 or even directly breaking the screw 302.
In one embodiment of the present application, the casing 1 is divided into several sections according to the length, wherein the several sections include an outer pipe opening section 101 and an expansion pipe section 102, and the outer pipe opening section 101 and the expansion pipe section 102 are sequentially arranged in the direction from the outside of the anchoring hole to the inside of the anchoring hole; the sleeve 1 is made of steel or iron.
In the present application, where the wall thicknesses of the tube walls of the casing 1 are compared in size, the two wall thicknesses to be compared are both wall thicknesses of the tube walls on the same radial section of the casing 1, and both wall thicknesses are comparable.
In this application, axis refers to a line about which an object or a three-dimensional figure rotates or can be conceived of rotating; the axial direction is usually the direction of the central axis of rotation of the cylinder, i.e. the direction common to the central axis, for a cylindrical object; the radial direction is perpendicular to the axial direction, and the radial direction is the radius or diameter direction of the end face circle of the cylinder; the vertical axial section is a section which is commonly located and determined in the vertical direction and the axial direction.
In the present application, when the expansion bolt is inserted into the anchoring hole 601 installed in the wall 6 and the screw 302 is tilted upward in the direction from the inside of the anchoring hole to the outside of the anchoring hole, the head 301 of the bolt 3 is correspondingly tilted, and although the head 301 of the bolt 3 is tilted, the normal rotation of the head 301 of the bolt 3 is not affected by the tilt, and the fastening of the head 301 of the bolt 3 to the suspension is not affected by the tilt, that is, the head 301 of the tilted bolt 3 can also perform the normal fastening function.
Methods and devices not described in detail in the present invention are all the prior art and are not described in detail.
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. An easily removable and reusable expansion bolt comprising a bolt, a sleeve and a tapered nut;
the bolt comprises a head and a screw rod which are integrally connected, and an external thread is arranged on the outer surface of the screw rod;
the sleeve comprises an outer pipe opening section and an expansion pipe section used for being extruded and expanded, the pipe wall of the expansion pipe section is divided into a plurality of circular arc plates, and a gap used for facilitating expansion is reserved between every two adjacent circular arc plates;
the outer diameter of the outer end of the cone nut is smaller than that of the inner end of the cone nut, and the cone nut is used for being inserted into the expansion pipe section to extrude and expand the expansion pipe section;
the screw rod of the bolt is inserted into the sleeve, the conical nut is arranged on an external thread of the inner section of the screw rod, which is exposed out of the sleeve, through a threaded connecting sleeve, the sleeve is sleeved on the screw rod, and the sleeve is positioned between the head of the bolt and the conical nut, so that the bolt is rotated to enable the conical nut to move towards the outside of the anchoring hole until the conical nut is extruded into the expansion pipe section; characterized in that the expansion bolt further comprises a second nut;
the outer surface of the pipe wall of the sleeve except the expansion pipe section is provided with an external thread, the second nut is arranged on the external thread on the outer surface of the pipe wall of the sleeve through a threaded connecting sleeve, so that the sleeve moves towards the outer direction of the anchoring hole when the second nut is jacked on the wall surface and simultaneously rotates the second nut.
2. A readily removable and reusable expansion bolt according to claim 1, wherein the axis of the hollow inside tube in said sleeve is at an angle of 0.5 ° to 15 ° to the axis of said sleeve, so that when said expansion bolt is inserted into an anchoring hole installed in a wall body with the axis of said sleeve parallel to the horizontal, the axis of the hollow inside tube in said sleeve is inclined upward from inside the anchoring hole to outside the anchoring hole, further so that said threaded rod is inclined upward from inside the anchoring hole to outside the anchoring hole, and for increasing the wall thickness of the upper lobe wall of said expansion tube section and for increasing the wall thickness of the lower lobe wall of said outer lobe section;
at the same time, the midpoint of the inner diameter of the tube interior cavity of the expanded tube section is located below the axis of the casing for causing the wall thickness of the upper lobe wall of the expanded tube section to be greater than the wall thickness of the lower lobe wall of the expanded tube section in a vertical axial cross-section of the casing;
meanwhile, the middle point of the inner diameter of the inner cavity of the outer pipe opening section is located above the axis of the sleeve, so that the wall thickness of the lower valve pipe wall of the outer pipe opening section is larger than that of the upper valve pipe wall of the outer pipe opening section on the vertical axial section of the sleeve.
3. A readily removable and reusable expansion bolt according to claim 2 wherein the axis of the cavity in the casing is in the same plane as the axis of the casing and the angle between the axis of the cavity in the casing and the axis of the casing is between 1 ° and 10 °.
4. A frangible and reusable expansion bolt according to claim 1 wherein the outer port section is from the outer end face of the casing and the length of the outer port section is from 1cm to 3 cm.
5. A frangible and reusable expansion bolt according to claim 1 wherein the maximum outer diameter of the cone nut is equal to the outer diameter of the sleeve.
6. A frangible and reusable expansion bolt according to claim 1 wherein the second nut is a hex nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110165633.8A CN112762072A (en) | 2021-02-06 | 2021-02-06 | Quick detachable and repeatedly usable's expansion bolts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110165633.8A CN112762072A (en) | 2021-02-06 | 2021-02-06 | Quick detachable and repeatedly usable's expansion bolts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112762072A true CN112762072A (en) | 2021-05-07 |
Family
ID=75705253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110165633.8A Withdrawn CN112762072A (en) | 2021-02-06 | 2021-02-06 | Quick detachable and repeatedly usable's expansion bolts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112762072A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389133A (en) * | 2021-06-04 | 2021-09-14 | 华南理工大学 | Shear part of spiral spring bolt and construction method |
| CN114893235A (en) * | 2022-04-29 | 2022-08-12 | 福州大学 | Hollow scalelike grouting double expansion type anchor rod for crushing area |
-
2021
- 2021-02-06 CN CN202110165633.8A patent/CN112762072A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389133A (en) * | 2021-06-04 | 2021-09-14 | 华南理工大学 | Shear part of spiral spring bolt and construction method |
| CN114893235A (en) * | 2022-04-29 | 2022-08-12 | 福州大学 | Hollow scalelike grouting double expansion type anchor rod for crushing area |
| CN114893235B (en) * | 2022-04-29 | 2023-02-10 | 福州大学 | Hollow scalelike grouting double-expansion anchor rod for crushing area |
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Application publication date: 20210507 |
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| WW01 | Invention patent application withdrawn after publication |