CN221074907U - Cumulative reverse expansion bolt - Google Patents
Cumulative reverse expansion bolt Download PDFInfo
- Publication number
- CN221074907U CN221074907U CN202322131022.9U CN202322131022U CN221074907U CN 221074907 U CN221074907 U CN 221074907U CN 202322131022 U CN202322131022 U CN 202322131022U CN 221074907 U CN221074907 U CN 221074907U
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- CN
- China
- Prior art keywords
- expansion
- nut
- bolt
- boss
- reverse
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- 230000001186 cumulative effect Effects 0.000 title claims description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 12
- 241001330002 Bambuseae Species 0.000 claims abstract description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 12
- 239000011425 bamboo Substances 0.000 claims abstract description 12
- 241000446313 Lamella Species 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 241000561734 Celosia cristata Species 0.000 claims abstract description 3
- 210000001520 comb Anatomy 0.000 claims abstract description 3
- 238000009825 accumulation Methods 0.000 claims abstract 2
- 238000009434 installation Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 241000826860 Trapezium Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses an accumulated reverse expansion bolt, which comprises a bolt, an expansion cylinder and a pushing nut, wherein the bolt is at least sleeved with the expansion cylinder and the pushing nut, the bolt comprises a head and a screw, a boss with a guiding taper is arranged below the head, the expansion cylinder is sleeved on the screw and is abutted against the boss, the pushing nut is arranged below the expansion cylinder, and the pushing nut is in threaded fit with the screw; the top of expansion section of thick bamboo is the cockscomb structure and has seted up the lamella form recess, and anti-skidding recess has been seted up to the bottom of expansion section of thick bamboo, propulsion nut's top is equipped with and inlays complex lug with anti-skidding recess, and propulsion nut's below has the direction tapering, and when screwing the bolt, propulsion nut promotes expansion section of thick bamboo upward movement, and the direction tapering makes the lamella of tooth of expansion section of thick bamboo upwards outwards move and reverse pierces the substrate internally. The utility model adopts the accumulation type reverse tensile structure, has simple structure, safety, reliability and good stability, can effectively improve the installation efficiency, and has longer service life and lower production cost.
Description
Technical Field
The utility model relates to the technical field of fasteners, in particular to a cumulative reverse expansion bolt.
Background
Expansion bolts are commonly used in life and achieve a fixing effect by utilizing wedge-shaped inclination to promote expansion to generate friction grip. When the screw rod is used, the screw rod is pulled outwards through the locking nut, so that expansion deformation occurs, and finally fixation is realized.
The goods shelves are necessary articles for the display or storage of goods in modern supermarkets, shops and warehouses, and often the goods shelves shake and the bases are unstable due to too many and too heavy placed articles. At present, in order to enhance the stability of a goods shelf, the goods shelf adopts a mounting mode of a tower base, the tower base is fixed on the ground through a chemical expansion bolt, and the construction steps of the chemical expansion bolt are as follows: taking holes, cleaning a hairbrush, blowing ash, pouring liquid medicine, placing bolts, standing for solidification, installing a fixture, regulating the level, and pouring concrete at a suspended position. Because the chemical expansion bolts are generally thicker and shorter, the anchor depth is shallower, the adaptability to substrate cracks is poorer, the bearing capacity is low, if the anchoring substrate is a soft mud or sand instead of reinforced concrete, the chemical expansion bolts can fail, so that the tower type base is loosened, the goods shelf is finally loosened and even collapsed, the danger is caused, and the greater economic loss and the potential safety hazard are brought to users.
Therefore, in order to solve the above problems, the present invention has been made.
Disclosure of utility model
The utility model aims to provide a mechanical expansion bolt with performance exceeding that of a chemical expansion screw, which has the advantages of simple structure, convenient operation, safety, reliability, good stability, longer service life and lower production cost, and can effectively improve the installation efficiency.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the accumulated reverse expansion bolt comprises a bolt, an expansion cylinder and a pushing nut, wherein the bolt is at least sleeved with one expansion cylinder and one pushing nut, the bolt comprises a head and a screw, a boss with a guiding taper is arranged below the head of the bolt, the expansion cylinder is sleeved on the screw and is positioned below the boss, the pushing nut is arranged below the expansion cylinder, and the pushing nut is in threaded fit with the screw; the top of expansion section of thick bamboo is the cockscomb structure and has seted up the lamella form recess, the antiskid recess has been seted up to the bottom of expansion section of thick bamboo, propulsion nut's top is equipped with and inlays complex lug with the antiskid recess, propulsion nut's below has the direction tapering, and when screwing the bolt, propulsion nut promotes expansion section of thick bamboo upward movement, and the direction tapering makes the lamella of expansion section of thick bamboo upwards outwards move and reverse pierces the substrate internally.
Further, the cross section of the boss is of a trapezoid structure with a wide upper part and a narrow lower part.
Further, the diameter of the boss bottom is larger than the diameter of the petal-shaped groove.
Further, the boss and the bolt are integrally formed, or the boss is sleeved with the bolt.
Further, the diameter of the bottom of the expansion cylinder is the same as the diameter of the top of the push nut.
Further, the propelling nut is in a truncated cone shape with a larger top and a smaller bottom.
Further, the diameter of the bottom of the push nut is larger than the diameter of the lobe-shaped groove.
Further, when the bolt is sleeved with more than one expansion cylinder and the propelling nut, the propelling nut at the bottommost part is a columnar nut, namely the diameters of the top end and the bottom end of the propelling nut at the bottommost part are the same.
After the scheme is adopted, the gain effect of the utility model is as follows:
According to the utility model, an accumulated reverse tensile structure is adopted, a plurality of expansion cylinders and pushing nuts are sleeved on a screw rod in sequence by arranging a boss below the head of the bolt, and as the top of each expansion cylinder is provided with a plurality of petal-shaped grooves and a plurality of saw teeth, and the bottom of each expansion cylinder is provided with an anti-slip groove for preventing the expansion cylinder from shifting, the pushing nuts are matched with the bolts in a threaded manner to push the expansion cylinders to move upwards, so that the saw teeth at the top of each expansion cylinder are reversely inserted into a base material body, and under the action of reverse resistance of the saw teeth at the top of each expansion cylinder, the expansion cylinders are accumulated layer by layer and cooperate to generate tensile property which is superior to that of a chemical expansion bolt, and then the goods shelf is firmly fixed on the surface of the base material. The utility model has simple and firm installation, good stability, replaceable bolt and longer service life, and simultaneously, the cost of the expansion bolt is lower than that of a chemical expansion bolt, and the cost can be saved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a side view of a pusher nut in an embodiment of the present utility model;
FIG. 3 is a top view of a pusher nut in accordance with an embodiment of the present utility model;
FIG. 4 is a bottom view of a pusher nut in accordance with an embodiment of the present utility model;
FIG. 5 is a side view of a bottommost push nut in accordance with an embodiment of the present utility model;
FIG. 6 is a side view of an expansion cylinder in an embodiment of the utility model;
FIG. 7 is a top view of an expansion cylinder in an embodiment of the utility model;
FIG. 8 is a bottom view of an expansion cylinder in an embodiment of the utility model;
FIG. 9 is a schematic installation view of an embodiment of the present utility model;
Fig. 10 is a partial enlarged view of a in fig. 9.
Description of the reference numerals:
1. A bolt; 11. a head; 12. a screw; 13. a boss; 2. an expansion cylinder; 21. saw teeth; 22. a petal-shaped groove; 23. an anti-slip groove; 3. advancing the nut; 31. a bump; 4. a substrate.
Detailed Description
The present utility model will be described in detail below with reference to fig. 1-10 and the detailed description thereof.
The utility model provides a cumulative reverse expansion bolt, shown in fig. 1, includes bolt 1, expansion cylinder 2 and propulsion nut 3, at least one expansion cylinder 2 and propulsion nut 3 have been cup jointed on the bolt, bolt 1 includes head 11 and screw rod 12 the head 11 below of bolt 1 is equipped with one and has the boss 13 of direction tapering, expansion cylinder 2 cup joints on screw rod 12 and is located boss 13's below, boss 13 bottom's diameter is greater than the diameter of lobe recess 22, as shown in fig. 6-8, expansion cylinder 2's top is the sawtooth 21 form and has seted up lobe recess 22, in order to prevent expansion cylinder 2 to shift in the use, expansion cylinder 2's bottom has seted up anti-skidding recess 23, expansion cylinder 2's below is equipped with propulsion nut 3, propulsion nut 3's below is equipped with the lug 31 with anti-skidding recess 23 complex, the below of propulsion nut 3 has the direction tapering, see fig. 2 and fig. 5, when screwing bolt 1, propulsion nut 3 promotes expansion cylinder 2 upward movement and boss 13 and the diameter of lobe 13 looks like and the opposite tooth recess 22 is formed in the reverse tooth effect of reverse expansion cylinder 2 and is formed the reverse tooth resistance of anti-stretching into the counter-direction tooth structure under the effect of lobe 13 and is formed in the reverse expansion cylinder 2 and is used to the counter-pulling.
Specifically, the diameter of the top of the push nut 3 is the same as the diameter of the bottom of the expansion cylinder 2, as shown in fig. 2-3, the push nut 3 is in a shape of a truncated cone with a larger top and a smaller bottom, and the diameter of the bottom of the push nut 3 is larger than the diameter of the petal-shaped groove 22; the boss 13 can with bolt 1 integrated into one piece, also can cup joint on bolt 1, and this embodiment preferably adopts boss 13 to cup joint the mounting means of bolt 1, the cross section of boss 13 is wide in the upper portion and narrow in the lower portion trapezium structure, and the lateral wall is wedge face structure around boss 13, and places a gasket between bolt 1 and the boss 13 for increase bolt 1 head 11 and boss 13's area of contact reduces pressure, prevents not hard up. In addition, the boss 13 sleeved on the bolt 1 in the embodiment can be replaced by the push nut 3.
Compared with the prior art, the scheme can determine whether the expansion bolt needs to be sleeved with more than one expansion cylinder 2 and one propelling nut 3 according to actual conditions, namely the properties of different base materials 4 and the requirements of different anchoring depths, the embodiment uses 10 expansion cylinders 2 and propelling nuts 3 for description, when 10 expansion cylinders 2 and propelling nuts 3 are sleeved on the bolt 1 in sequence, the propelling nuts 3 can adopt the structure, namely the diameter of the top of the propelling nuts 3 is the same as the diameter of the bottom of the expansion cylinders 2, the propelling nuts 3 are in the shape of a round table with larger top and smaller bottom, and the diameter of the bottom of the propelling nuts 3 is larger than the diameter of the petal-shaped grooves 22; the bottom pushing nut 3 may be a cylindrical nut, as shown in fig. 5, the diameters of the top end and the bottom end of the bottom pushing nut 3 are the same, 10 expansion cylinders 2 and the pushing nut 3 are accumulated on the screw 12 to form a multi-layer reverse tensile structure, and when in use, under the action of the sawtooth reverse resistance, the expansion cylinders and the pushing nut are accumulated layer by layer to cooperatively generate excellent tensile performance, and the stability and the firmness of the expansion cylinders and the pushing nut are far greater than those of a chemical expansion bolt.
When the expansion bolt is used, the screw rod 1 and the screw rod 12 drive the push nut 3 to rotate, the push nut 3 pushes the expansion cylinder 2 to move upwards, the first expansion cylinder 2 is abutted against the boss 13, under the action of the guiding taper of the boss 13, the tooth petals of the first expansion cylinder 2 move upwards and outwards to reversely penetrate into the base material 4, meanwhile, the push nut 3 is arranged above the second expansion cylinder 2, and due to the guiding taper arranged below the push nut 3, the tooth petals of the second expansion cylinder 2 move upwards and outwards to reversely penetrate into the base material 4, and the like, a plurality of expansion cylinders 2 and the push nut 3 are accumulated on the screw rod 12, accumulate layer by layer under the action of the reverse resistance of the saw teeth 21 to form an accumulated reverse tensile structure, and the accumulated reverse tensile structure is superior to the tensile pulling performance of the chemical expansion bolt.
The installation process of the utility model is as follows:
As shown in fig. 9, an anchoring hole is formed on the surface of the base material 4, a bolt 1 sleeved with a plurality of expansion cylinders 2 and pushing nuts 3 is plugged into the anchoring hole, the bolt 1 is screwed, the pushing nuts 3 and the screw 12 are in threaded fit to push the expansion cylinders 2 to move upwards, the top end of the first expansion cylinder 2 is abutted against a boss 13, the tooth lobes of the expansion cylinders 2 move outwards upwards due to the fact that the diameter of the bottom of the boss 13 is larger than that of a lobe-shaped groove 22, the tooth lobes reversely penetrate into the base material 4, pushing nuts 3 are arranged above the second to ninth expansion cylinders 2, the guiding taper is arranged below the pushing nuts 3, in the process that the pushing nuts 3 continuously push the expansion cylinders 2 upwards, the tooth lobes of each expansion cylinder 2 move outwards and reversely penetrate into the base material 4, and the expansion bolts accumulate layer by layer under the action of reverse resistance of the tooth lobes, and excellent tensile pulling performance is produced in a synergistic manner. The final bottom push nut 3 may have the same truncated cone shape as the push nut 3, or may have a conventional cylindrical shape with the same diameter at the top and bottom ends.
The utility model is formed by a plurality of expansion barrels 2 and propelling nuts 3 and a multi-layer accumulated reverse tensile structure, a boss 13 is arranged below the head 11 of a bolt 1, the expansion barrels 2 and the propelling nuts 3 are sequentially sleeved on a screw 12, as the top of the expansion barrel 2 is provided with a plurality of petal-shaped grooves 22 and a plurality of saw teeth 21, the diameters of the boss 13 and the bottoms of the propelling nuts 3 are larger than the diameters of the petal-shaped grooves 22, compared with the prior art, the installation efficiency of the expansion bolt is 10 times of the installation efficiency of a chemical expansion bolt, and only three steps are needed in the installation: the fastening can be realized by taking holes, placing the bolts 1 and fixing objects, the stability is good, the operation is simple, the installation is firm, the bolts 1 are replaceable, the service life is longer, and meanwhile, the cost of the expansion bolts is lower than that of chemical expansion bolts, and the cost can be saved.
The above embodiments are only preferred embodiments of the present utility model, and are not limited to the present utility model, and all equivalent changes made according to the design key of the present utility model fall within the protection scope of the present utility model.
Claims (8)
1. The utility model provides a reverse expansion bolts of accumulation type which characterized in that: the screw bolt is sleeved with at least one expansion cylinder and one pushing nut, the screw bolt comprises a head and a screw rod, a boss with guiding taper is arranged below the head of the screw bolt, the expansion cylinder is sleeved on the screw rod and is positioned below the boss, the pushing nut is arranged below the expansion cylinder, and the pushing nut is in threaded fit with the screw rod; the top of expansion section of thick bamboo is the cockscomb structure and has seted up the lamella form recess, the antiskid recess has been seted up to the bottom of expansion section of thick bamboo, propulsion nut's top is equipped with and inlays complex lug with the antiskid recess, propulsion nut's below has the direction tapering, and when screwing the bolt, propulsion nut promotes expansion section of thick bamboo upward movement, and the direction tapering makes the lamella of expansion section of thick bamboo upwards outwards move and reverse pierces the substrate internally.
2. A cumulative reverse expansion bolt according to claim 1, wherein: the cross section of the boss is of a trapezoid structure with a wide upper part and a narrow lower part.
3. A cumulative reverse expansion bolt according to claim 2, wherein: the diameter of the bottom of the boss is larger than that of the petal-shaped groove.
4. A cumulative reverse expansion bolt according to claim 1, wherein: the boss and the bolt are integrally formed, or the boss is sleeved with the bolt.
5. A cumulative reverse expansion bolt according to claim 1, wherein: the diameter of the bottom of the expansion cylinder is the same as that of the top of the push nut.
6. A cumulative reverse expansion bolt according to claim 5 and further comprising: the propelling nut is in a truncated cone shape with a larger top and a smaller bottom.
7. A cumulative reverse expansion bolt according to claim 6 and further comprising: the diameter of the bottom of the propelling nut is larger than that of the petal-shaped groove.
8. A cumulative reverse expansion bolt according to claim 7 and further comprising: when the bolt is sleeved with more than one expansion cylinder and the propelling nut, the bottom propelling nut is a columnar nut, namely the diameters of the top end and the bottom end of the bottom propelling nut are the same.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023202239488 | 2023-02-15 | ||
| CN202320223948 | 2023-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221074907U true CN221074907U (en) | 2024-06-04 |
Family
ID=91251592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322131022.9U Active CN221074907U (en) | 2023-02-15 | 2023-08-09 | Cumulative reverse expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074907U (en) |
-
2023
- 2023-08-09 CN CN202322131022.9U patent/CN221074907U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |