CN212202758U - Novel opposite-impact expansion bolt - Google Patents
Novel opposite-impact expansion bolt Download PDFInfo
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- CN212202758U CN212202758U CN202020350467.XU CN202020350467U CN212202758U CN 212202758 U CN212202758 U CN 212202758U CN 202020350467 U CN202020350467 U CN 202020350467U CN 212202758 U CN212202758 U CN 212202758U
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- bolt
- expansion sleeve
- expansion
- nut
- thread
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Abstract
The utility model discloses a novel offset expansion bolts, including bolt and expansion sleeve, the bolt is installed in expansion sleeve, the both ends of bolt are equipped with the screw thread district respectively, expansion sleeve's both ends hoop interval is equipped with a plurality of bar slotted holes respectively, the length direction of bar slotted hole is unanimous with expansion sleeve's length direction, and an expansion sleeve's tip is equipped with the internal thread, the screw thread cooperation on the screw thread district of bolt one end and the expansion sleeve, be equipped with the nut with another tip looks butt of expansion sleeve in the screw thread district of the other end, the one end that the bolt is close to the nut still is equipped with the supporting rod that extends along axial length direction, when the bolt is rotatory, expansion sleeve is equipped with internal screw thread one end and the moving direction of nut to the bolt is opposite. When the wall opening device is used, the positions of the slotted holes at the two ends of the expansion sleeve are respectively extruded to the hole wall of the wall opening in an expansion mode after being pressed, so that firm bond stress is formed at the front end and the rear end of the wall opening and the expansion sleeve, and the installation firmness is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of the fastener, concretely relates to novel offset expansion bolts.
Background
The expansion bolts are generally metal expansion bolts, and the fixing principle thereof is as follows: the expansion bolt utilizes the wedge-shaped inclination to promote expansion to generate friction gripping force, thereby achieving the fixing effect. One end of the bolt is provided with threads, and the other end of the bolt is provided with a taper. The wall is covered by an iron sheet cylinder, one end of the iron sheet cylinder is provided with a plurality of notches, the notches are plugged into a hole drilled on the wall together, then a nut is locked, the nut pulls a bolt outwards to pull the taper into the iron sheet cylinder, the notches of the iron sheet cylinder are expanded, and the iron sheet cylinder is tightly fixed on the wall and is generally used for fastening protective guards, rain awnings, air conditioners and the like on materials such as cement, bricks and the like.
In the prior art, the fixing mode of the expansion bolt is generally a single-side fixing mode, that is, a drilled hole formed in a wall surface is a blind hole, the expansion bolt is installed in the blind hole and then fastened, and after the fastening is completed, the fixed end of the bolt protrudes out of the surface of the wall body so as to be used for fixing other objects. The expansion bolts described above have the following disadvantages: expansion bolts only have one end to be expanded, if when the hole made is darker, just hard to keep the bolt stable, the bolt is easy to the direction removal in the hole and leads to becoming flexible, though can not drop out, but influences the result of use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a novel offset expansion bolt, the slotted hole position at expansion sleeve both ends extrudees to the pore wall inflation of wall trompil respectively after being pressed when this offset expansion bolt uses to both ends all form firm bond stress around wall trompil and the expansion sleeve, thereby guaranteed this offset expansion bolt's installation fastness, and simple structure, implement the feasibility height.
For realizing above-mentioned purpose, the technical scheme of the utility model design a novel hedging expansion bolt, including bolt and expansion sleeve, the bolt is installed in expansion sleeve, the both ends of bolt are equipped with the screw thread district respectively, expansion sleeve's both ends hoop interval is equipped with a plurality of bar slotted holes respectively, and the length direction of bar slotted hole is unanimous with expansion sleeve's length direction, and an expansion sleeve's tip is equipped with the internal thread, the screw thread district of bolt one end cooperates with the internal thread spiro union on the expansion sleeve, be equipped with on the screw thread district of the bolt other end with the nut of another tip looks butt of expansion sleeve, just the one end that the bolt is close to the nut still is equipped with the supporting rod that extends along axial length direction, the cross section of supporting rod is hexagon structure, the vice cooperation of screw thread of nut, expansion sleeve and bolt is as follows: when the bolt is rotated, the end of the expansion sleeve provided with the internal thread and the nut are both opposite in moving direction relative to the bolt.
When the offset expansion bolt is used, the positions of the slotted holes at the two ends of the expansion sleeve are respectively expanded and extruded towards the hole wall of the wall opening after being pressed, so that firm bond force is formed between the wall opening and the front and rear ends of the expansion sleeve, and the installation firmness of the offset expansion bolt is ensured; the clamping rod with the hexagonal cross section is convenient for fixing, clamping and screwing the bolt through a wrench, so that the installation efficiency of the offset expansion bolt is ensured; and the structure is simple, and the implementation feasibility is high.
In order to facilitate smooth preparation and implementation of the opposite-impact expansion bolt, the preferable technical scheme is that the thread directions of two thread areas on the bolt are opposite, and the thread directions of internal threads on the expansion sleeve and a nut are the same; or the thread directions of the two thread areas on the bolt are the same, and the internal thread on the expansion sleeve is opposite to the thread direction of the nut. The bolt is simple with expansion sleeve's mounting means, and the bolt is the cylinder structure that the external diameter equals, can adjust expansion sleeve spiro union position on the bolt in a flexible way, has improved the convenient flexibility of use of this offset expansion bolts.
In order to improve the stability of the opposite-impact expansion bolt during installation, a countersunk groove hole is further formed in one end, close to the nut, of the expansion sleeve, and the maximum outer diameter of the nut is smaller than the inner diameter of the countersunk groove hole, the length of the nut and the depth of the countersunk groove hole. When the opposite-impact expansion bolt is installed, one end of the nut is located in the countersunk head slotted hole of the expansion sleeve, so that the clamping stability of the nut is improved, and the installation efficiency of the opposite-impact expansion bolt is ensured.
Further preferably, the countersunk head slot hole is of an inner hexagonal structure matched with the nut. When the offset expansion bolt is installed, the nut can be placed in the countersunk head slotted hole in advance, namely, the countersunk head slotted hole plays dual roles of limiting and preventing rotation for the nut, and the installation efficiency of the offset expansion bolt is improved.
In addition, according to a further preferable technical scheme, an inner hexagonal groove is further formed in the free end face of the clamping rod. When the opposite-impact expansion bolt is installed, a common wrench or an inner hexagonal wrench can be selected to carry out the screwing-in of the bolt, and the convenient and fast adaptation flexibility during the installation of the bolt is improved.
In order to ensure the expansion efficiency of the expansion sleeve, a further preferred technical solution is that the expansion sleeve is provided with an inner diameter at the position of the slotted hole which is larger than the inner diameter at the rest positions of the expansion sleeve. The thickness of the cylinder wall at the position of the strip-shaped slotted hole of the expansion sleeve is smaller than the thickness of the cylinder wall at other positions, so that the expansion efficiency of the strip-shaped slotted hole at the front end and the rear end of the expansion sleeve is improved, and the installation efficiency of the offset expansion bolt is further ensured.
In order to further improve the gripping force of the wall opening hole on the expansion sleeve, a further preferable technical scheme is that an anti-skid texture structure is further arranged on the outer wall of the expansion sleeve. The anti-slip texture structure enables the hole wall of the wall opening to have good holding force on the outer wall of the expansion sleeve, so that the combination firmness of the offset expansion bolt and the wall opening is ensured.
The utility model has the advantages and the beneficial effects that:
1. when the offset expansion bolt is used, the positions of the slotted holes at the two ends of the expansion sleeve are respectively expanded and extruded towards the hole wall of the wall opening after being pressed, so that firm bond force is formed between the wall opening and the front and rear ends of the expansion sleeve, and the installation firmness of the offset expansion bolt is ensured; the clamping rod with the hexagonal cross section is convenient for fixing, clamping and screwing the bolt through a wrench, so that the installation efficiency of the offset expansion bolt is ensured; and the structure is simple, and the implementation feasibility is high.
2. The bolt is simple with expansion sleeve's mounting means, and the bolt is the cylinder structure that the external diameter equals, can adjust expansion sleeve spiro union position on the bolt in a flexible way, has improved the convenient flexibility of use of this offset expansion bolts.
3. When the hedging expansion bolt is installed, one end of the nut is positioned in the countersunk head slotted hole of the expansion sleeve, so that the clamping stability of the nut is improved, and the installation efficiency of the hedging expansion bolt is ensured; the countersunk head slotted hole is of an inner hexagonal structure matched with the nut, and when the offset expansion bolt is installed, the nut can be placed in the countersunk head slotted hole in advance, namely, the countersunk head slotted hole has the double functions of limiting and preventing rotation on the nut, so that the installation efficiency of the offset expansion bolt is improved.
4. When the opposite-impact expansion bolt is installed, a common wrench or an inner hexagonal wrench can be selected to carry out the screwing-in of the bolt, and the convenient and fast adaptation flexibility during the installation of the bolt is improved.
5. The expansion sleeve is provided with a strip-shaped slotted hole, and the inner diameter of the position of the strip-shaped slotted hole is larger than that of the rest positions of the expansion sleeve. The thickness of the cylinder wall at the position of the strip-shaped slotted hole of the expansion sleeve is smaller than the thickness of the cylinder wall at other positions, so that the expansion efficiency of the strip-shaped slotted hole at the front end and the rear end of the expansion sleeve is improved, and the installation efficiency of the offset expansion bolt is further ensured.
6. The anti-slip texture structure enables the hole wall of the wall opening to have good holding force on the outer wall of the expansion sleeve, so that the combination firmness of the offset expansion bolt and the wall opening is ensured.
Drawings
FIG. 1 is a front view of the counter impact expansion bolt of the present invention;
FIG. 2 is a cross-sectional view of the counter impact expansion bolt of the present invention;
fig. 3 is a perspective view of the counter impact type expansion bolt of the present invention;
FIG. 4 is a schematic view of a bolt;
FIG. 5 is a perspective view of one end of the expansion sleeve;
FIG. 6 is another end perspective view of the expansion sleeve;
FIG. 7 is a cross-sectional view of the expansion sleeve;
fig. 8 is a state diagram of the opposite impact type expansion bolt of the present invention.
In the figure: 1. a bolt; 2. an expansion sleeve; 3. a nut; 1-1, a threaded zone; 1-2, clamping rods; 1-2-1, inner hexagonal grooves; 2-1, a slotted hole; 2-2, countersunk slotted holes; 2-3, internal thread.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Examples
As shown in fig. 1-8, the utility model relates to a novel counter-impact expansion bolt, which comprises a bolt 1 and an expansion sleeve 2, wherein the bolt 1 is installed in the expansion sleeve 2, both ends of the bolt 1 are respectively provided with a thread area 1-1, both ends of the expansion sleeve 2 are respectively provided with a plurality of strip-shaped slotted holes 2-1 at circumferential intervals, the length direction of the strip-shaped slotted holes 2-1 is consistent with the length direction of the expansion sleeve 2, one end of the expansion sleeve 2 is provided with an internal thread 2-3, the thread area 1-1 at one end of the bolt 1 is in threaded fit with the internal thread 2-3 on the expansion sleeve 2, the thread area 1-1 at the other end of the bolt 1 is provided with a nut 3 abutted against the other end of the expansion sleeve 2, and one end of the bolt 1 close to the nut 3 is also provided with a clamping rod 1-2 extending along, the cross section of the clamping rod 1-2 is of a hexagonal structure, and the matching relationship of the nut 3, the expansion sleeve 2 and the bolt 1 is as follows: when the bolt 1 is rotated, the end of the expansion sleeve 2 provided with the internal thread 2-3 and the nut 3 are both moved in opposite directions relative to the bolt 1.
Preferably, the thread directions of the two thread areas 1-1 on the bolt 1 are opposite, and the internal thread 2-3 on the expansion sleeve 2 is the same as the thread direction of the nut 3; or the thread directions of the two thread areas 1-1 on the bolt 1 are the same, and the internal thread 2-3 on the expansion sleeve 2 is opposite to the thread direction of the nut 3.
Preferably, one end of the expansion sleeve 2 close to the nut 3 is further provided with a countersunk groove hole 2-2, and the maximum outer diameter of the nut 3 is less than the inner diameter of the countersunk groove hole 2-2 and the length of the nut 3 is greater than the depth of the countersunk groove hole 2-2.
As a further preference, the countersunk head slot 2-2 is an internal hexagonal structure adapted to the nut 3.
Preferably, the free end surface of the clamping rod 1-2 is also provided with an inner hexagonal groove 1-2-1.
As a further preference, the expansion sleeve 2 is provided with an inner diameter at the location of the slotted hole 2-1 > the inner diameter at the remaining location of the expansion sleeve 2.
As a further preference, the outer wall of the expansion sleeve 2 is also provided with an anti-skid texture.
The utility model relates to a hedging formula expansion bolts's theory of use:
when the expansion bolt is installed, firstly, a hole with a preset depth and diameter is drilled on the wall by a drill (the diameter of the hole is equal to or slightly larger than the diameter of the expansion sleeve, and the depth of the hole is slightly larger than the length of the expansion sleeve), then the opposite impact type expansion bolt is placed into the hole, and the bolt 1 is screwed by a tool such as an inner hexagonal wrench or an open end wrench, so that the bolt 1 rotates relative to the expansion sleeve 2; when the bolt 1 rotates, one end of the expansion sleeve 2 provided with the internal threads 2-3 and the nut 3 can move oppositely along the bolt 1, and the positions of the strip-shaped slotted holes 2-1 at the two ends of the expansion sleeve 2 are pressed to the inner wall of the upper hole of the wall to expand, so that the expansion sleeve 2 can not move relative to the wall, and the fixed installation of the hedging type expansion bolt is realized.
When the opposite-punching type expansion bolt is installed, the expansion sleeve 2 is fixed at the front end and the rear end, so that the expansion sleeve 2 cannot move in the wall body no matter whether the depth of a hole drilled in advance is too deep; the outer wall of expansion sleeve 2 is equipped with anti-skidding line structure, can effectively prevent that expansion sleeve 2 from taking place rotatoryly, consequently makes this offset expansion bolts fixed more stable.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The novel counter-impact expansion bolt is characterized by comprising a bolt (1) and an expansion sleeve (2), wherein the bolt (1) is installed in the expansion sleeve (2), threaded areas (1-1) are respectively arranged at two ends of the bolt (1), a plurality of strip-shaped slotted holes (2-1) are respectively arranged at two ends of the expansion sleeve (2) at circumferential intervals, the length direction of the strip-shaped slotted holes (2-1) is consistent with that of the expansion sleeve (2), an internal thread (2-3) is arranged at one end of the expansion sleeve (2), the threaded areas (1-1) at one end of the bolt (1) are in threaded fit with the internal thread (2-3) on the expansion sleeve (2), a nut (3) which is abutted against the other end of the expansion sleeve (2) is arranged on the threaded areas (1-1) at the other end of the bolt (1), and the one end that bolt (1) is close to nut (3) still is equipped with clamping rod (1-2) that extend along axial length direction, the cross section of clamping rod (1-2) is hexagon structure, nut (3), expansion sleeve (2) and bolt (1) screw thread pair cooperation relation as follows: when the bolt (1) rotates, the end of the expansion sleeve (2) provided with the internal thread (2-3) and the nut (3) are opposite to each other in the moving direction relative to the bolt (1).
2. A new counter-impact expansion bolt according to claim 1, characterized in that the two threaded zones (1-1) on the bolt (1) have opposite thread directions, and the internal thread (2-3) on the expansion sleeve (2) has the same thread direction as the nut (3); or the thread directions of the two thread areas (1-1) on the bolt (1) are the same, and the internal threads (2-3) on the expansion sleeve (2) are opposite to the thread direction of the nut (3).
3. A new counter-impact expansion bolt according to claim 1, characterized in that the expansion sleeve (2) is further provided with a countersunk hole (2-2) at the end near the nut (3), and the maximum outer diameter of the nut (3) < inner diameter of the countersunk hole (2-2), length of the nut (3) > depth of the countersunk hole (2-2).
4. A new counter-impact expansion bolt according to claim 3, characterized in that said countersunk slotted hole (2-2) is of internal hexagonal configuration adapted to said nut (3).
5. A new counter-impact expanding bolt according to claim 1, characterized in that the free end surface of the clamping rod (1-2) is further provided with an inner hexagonal groove (1-2-1).
6. A new counter-impact expansion bolt according to any one of claims 1 to 5, characterised in that the expansion sleeve (2) is provided with an internal diameter at the location of the slotted hole (2-1) which is greater than the internal diameter at the rest of the expansion sleeve (2).
7. A new counter-impact expansion bolt according to claim 6, characterized in that the outer wall of the expansion sleeve (2) is provided with an anti-skid texture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020350467.XU CN212202758U (en) | 2020-03-19 | 2020-03-19 | Novel opposite-impact expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020350467.XU CN212202758U (en) | 2020-03-19 | 2020-03-19 | Novel opposite-impact expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212202758U true CN212202758U (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020350467.XU Active CN212202758U (en) | 2020-03-19 | 2020-03-19 | Novel opposite-impact expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212202758U (en) |
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2020
- 2020-03-19 CN CN202020350467.XU patent/CN212202758U/en active Active
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