CN219159343U

CN219159343U - Expansion bolt capable of effectively avoiding loosening

Info

Publication number: CN219159343U
Application number: CN202320209040.1U
Authority: CN
Inventors: 李雄; 李高峰; 段冬梅; 李志法
Original assignee: Handan Aojia Fastener Manufacturing Co ltd
Current assignee: Handan Aojia Fastener Manufacturing Co ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-06-09
Anticipated expiration: 2033-02-14

Abstract

The utility model discloses an expansion bolt capable of effectively preventing loosening, which comprises a bolt, a nut, a spring washer, a flat washer and an expansion sleeve, wherein an anti-loosening mechanism is arranged at the bottom of the bolt and comprises a secondary locking section, an inner hole, a threaded sleeve, a screw rod, an inner hexagon head, a sliding plate, two groups of fixing holes and two groups of fixing heads. The anti-loosening mechanism has the beneficial effects that the anti-loosening mechanism at the bottom of the bolt firstly expands the bolt, the expansion sleeve, the mounting piece and the fixing body into a whole through the nut, then the inner hexagon head is rotated to enable the two groups of fixing heads to extend out, the bolt is secondarily fixed, the anti-loosening effect is effectively achieved, and when the bolt breaks, the T-shaped spanner can take out the expansion bolt from the hole to replace, so that the anti-loosening mechanism is convenient to use.

Description

Expansion bolt capable of effectively avoiding loosening

Technical Field

The utility model relates to the field of expansion bolts, in particular to an expansion bolt capable of effectively avoiding loosening.

Background

The expansion bolt consists of a countersunk bolt, an expansion pipe, a flat washer, a spring pad and a hexagonal nut, when the expansion bolt is used, an impact electric drill is used for drilling holes with corresponding sizes on a fixed body, then the bolt and the expansion pipe are arranged in the holes, and the bolt, the expansion pipe, the mounting piece and the fixed body can be expanded into a whole by screwing the nut.

The application number is CN201520075290.6 in the current patent discloses an expansion bolts that can effectively avoid the pine to take off, adopts the structure that sets up the expansion taper sleeve between expansion sleeve and bolt, when tightening lock nut, the expansion taper sleeve down removes, expands the expansion sleeve, reaches the purpose of rooting. However, the single screwing structure is adopted for fixing, so that the phenomenon of unstable installation is easily caused, and when the bolt breaks, the expansion bolt is not easy to take out from the hole for replacement.

The foregoing is not necessarily a prior art, and falls within the technical scope of the inventors.

Disclosure of Invention

Aiming at the defects, the utility model provides the expansion bolt capable of effectively avoiding loosening so as to solve the problem of loosening prevention of the expansion bolt.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an expansion bolt capable of effectively avoiding loosening comprises a bolt, a nut, a spring washer, a flat washer and an expansion sleeve, wherein an anti-loosening mechanism is arranged at the bottom of the bolt;

the anti-loosening mechanism comprises a secondary locking section, an inner hole, a threaded sleeve, a screw rod, an inner hexagonal head, a sliding plate, two groups of fixing holes and two groups of fixing heads, wherein the secondary locking section is arranged at the lower end of a bolt, the inner hole is formed in the bolt, the threaded sleeve is movably mounted at the lower end of the inner hole, the screw rod is movably inserted into the threaded sleeve, the inner hexagonal head is mounted at the upper end of the screw rod, the sliding plate is slidably mounted at the bottom of the inner hole, the upper end of the sliding plate is movably connected with the screw rod, the two groups of fixing holes are respectively formed in two sides of the secondary locking section, and the two groups of fixing heads are respectively movably mounted in the two groups of fixing holes.

Further, the upper end of the bolt is respectively provided with a primary locking section and a front end section, and the diameter of the front end section is respectively larger than that of the primary locking section and that of the secondary locking section.

Further, an L-shaped opening is formed in one side of the upper end of the expansion sleeve, a T-shaped wrench is matched with the expansion sleeve, a round hole is formed in the inner bottom of the T-shaped wrench, and an L-shaped pull block corresponding to the L-shaped opening is mounted on one side of the bottom of the T-shaped wrench.

Further, the front surface of the sliding plate is provided with two groups of inclined strip-shaped sliding grooves, and the rear ends of the two groups of fixing heads are respectively and slidably arranged on the two groups of inclined strip-shaped sliding grooves through sliding blocks.

Further, the bottom of the expansion sleeve is provided with a plurality of openings parallel to the axial direction of the bolt.

The utility model provides an expansion bolt capable of effectively preventing loosening, which has the following beneficial effects that a locking mechanism at the bottom of the bolt is used for expanding the bolt, an expansion sleeve, a mounting piece and a fixing body into a whole through a nut, then two groups of fixing heads are extended out through rotating an inner hexagon head, the bolt is secondarily fixed, the loosening prevention effect is effectively achieved, and when the bolt breaks, a T-shaped spanner can be used for taking out the expansion bolt from a hole for replacement, so that the expansion bolt is convenient to use.

Drawings

Fig. 1 is a schematic view of an expansion bolt capable of effectively preventing loosening according to the present utility model.

Fig. 2 is a cross-sectional view of a bolt according to the present utility model.

FIG. 3 is a schematic view showing the two sets of fixing heads according to the present utility model.

Fig. 4 is a schematic view of an expanded casing according to the present utility model.

Fig. 5 is a cross-sectional view of a T-wrench according to the present utility model.

FIG. 6 is a broken-out schematic view of an expansion bolt according to the present utility model.

In the figure: 1. a bolt; 2. a nut; 3. a spring washer; 4. a flat gasket; 5. expanding the casing; 6. a secondary locking section; 7. an inner bore; 8. a threaded sleeve; 9. a screw; 10. an inner hexagon head; 11. a sliding plate; 12. a fixing hole; 13. a fixed head; 14. a primary locking section; 15. a front end section; 16. an L-shaped opening; 17. a T-shaped wrench; 18. a circular hole; 19. an L-shaped pull block; 20. a strip-shaped chute; 21. an opening.

Detailed Description

The utility model is described in detail below with reference to the accompanying drawings, as shown in fig. 1-6: an expansion bolt capable of effectively avoiding loosening comprises a bolt 1, a nut 2, a spring washer 3, a flat washer 4 and an expansion sleeve 5, wherein an anti-loosening mechanism is arranged at the bottom of the bolt 1; the anti-loosening mechanism comprises a secondary locking section 6, an inner hole 7, a threaded sleeve 8, a screw 9, an inner hexagon head 10, a sliding plate 11, two groups of fixing holes 12 and two groups of fixing heads 13, wherein the secondary locking section 6 is arranged at the lower end of the bolt 1, the inner hole 7 is formed in the bolt 1, the threaded sleeve 8 is movably mounted at the lower end of the inner hole 7, the screw 9 is movably mounted in the threaded sleeve 8 in a plug-in manner, the inner hexagon head 10 is mounted at the upper end of the screw 9, the sliding plate 11 is slidably mounted at the bottom of the inner hole 7, the upper end of the sliding plate is movably connected with the screw 9, the two groups of fixing holes 12 are respectively formed at two sides of the secondary locking section 6, and the two groups of fixing heads 13 are respectively movably mounted in the two groups of fixing holes 12; the upper end of the bolt 1 is respectively provided with a primary locking section 14 and a front end section 15, and the diameter of the front end section 15 is respectively larger than that of the primary locking section 14 and the secondary locking section 6; an L-shaped opening 16 is formed in one side of the upper end of the expansion sleeve 5, a T-shaped spanner 17 is matched with the expansion sleeve 5 for use, a circular hole 18 is formed in the bottom of the T-shaped spanner 17, and an L-shaped pull block 19 corresponding to the L-shaped opening 16 is arranged on one side of the bottom of the T-shaped spanner 17; the front surface of the sliding plate 11 is provided with two groups of inclined strip-shaped sliding grooves 20, and the rear ends of the two groups of fixed heads 13 are respectively and slidably arranged on the two groups of inclined strip-shaped sliding grooves 20 through sliding blocks; the bottom of the expansion sleeve 5 is provided with a number of openings 21 parallel to the axial direction of the bolt 1.

The working principle of the embodiment is as follows: when the electric impact drill is used, a user firstly drills holes with corresponding sizes on a fixed body by using the electric impact drill, then sequentially installs the bolt 1 and the expansion sleeve 5 into the holes, and tightly expands the bolt 1, the expansion sleeve 5, the mounting piece and the fixed body into a whole by screwing the nut 2;

and (3) during secondary fixation: the secondary locking section 6 is arranged at the lower end of the bolt 1, the inner hole 7 is arranged in the bolt 1, the threaded sleeve 8 is movably arranged at the lower end of the inner hole 7 through a fastening bearing, the screw rod 9 is movably inserted in the threaded sleeve 8, the inner hexagon head 10 is arranged at the upper end of the screw rod 9, the sliding plate 11 is slidably arranged at the bottom of the inner hole 7, the upper end of the sliding plate is movably connected with the screw rod 9, two groups of fixing holes 12 are respectively arranged at two sides of the secondary locking section 6, two groups of fixing heads 13 are respectively movably arranged in the two groups of fixing holes 12, the upper end of the bolt 1 is respectively provided with a primary locking section 14 and a front end section 15, the diameter of the front end section 15 is respectively larger than that of the primary locking section 14 and the secondary locking section 6, the front surface of the sliding plate 11 is provided with two groups of inclined strip-shaped sliding grooves 20, the rear ends of the two groups of fixing heads 13 are respectively slidably arranged on the two groups of inclined strip-shaped sliding grooves 20 through sliding blocks, as shown in fig. 2, a user twists the inner hexagon head 10 clockwise to enable the sliding plate 11 to push the sliding plate 11 to move downwards through the hexagonal wrench, and simultaneously, the sliding plate 11 drives the two groups of fixing heads 13 to stretch out for secondary fixing of the bolt 1, thereby effectively removing the bolt;

when the fracture is pulled out: when the bolt breaks, a user firstly turns the inner hexagon head 10 anticlockwise through the hexagon spanner to enable the two groups of fixing heads 13 to retract into the two groups of fixing holes 12, then sequentially removes the nut 2, the spring washer 3 and the flat washer 4, hammers down the bolt 1 downwards to enable the bolt 1 to move downwards, the bottom of the expansion sleeve 5 is reset, one side of the upper end of the expansion sleeve 5 is provided with an L-shaped opening 16, the expansion sleeve 5 is matched with a T-shaped spanner 17, the inner bottom of the T-shaped spanner 17 is provided with a circular hole 18, one side of the bottom of the T-shaped spanner 17 is provided with an L-shaped pulling block 19 corresponding to the L-shaped opening 16, as shown in fig. 5, the user is sleeved on the top of the bolt 1, rotates the T-shaped spanner 17, enables the L-shaped pulling block 19 to be matched with the L-shaped opening 16, as shown in fig. 6, and the expansion bolt in the hole can be taken out by pulling the T-shaped spanner 17 upwards.

The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.

Claims

1. An expansion bolt capable of effectively avoiding loosening comprises a bolt (1), a nut (2), a spring washer (3), a flat washer (4) and an expansion sleeve (5), and is characterized in that an anti-loosening mechanism is arranged at the bottom of the bolt (1);

the anti-loosening mechanism comprises a secondary locking section (6), an inner hole (7), a threaded sleeve (8), a screw rod (9), an inner hexagon head (10), a sliding plate (11), two groups of fixing holes (12) and two groups of fixing heads (13), wherein the secondary locking section (6) is arranged at the lower end of a bolt (1), the inner hole (7) is formed in the bolt (1), the threaded sleeve (8) is movably mounted at the lower end of the inner hole (7), the screw rod (9) is movably inserted in the threaded sleeve (8), the inner hexagon head (10) is mounted at the upper end of the screw rod (9), the sliding plate (11) is slidably mounted at the bottom of the inner hole (7), the upper end of the sliding plate is movably connected with the screw rod (9), the two groups of fixing holes (12) are respectively formed in two sides of the secondary locking section (6), and the two groups of fixing heads (13) are respectively movably mounted in the two groups of fixing holes (12).

2. An expansion bolt capable of effectively avoiding loosening as claimed in claim 1, wherein the upper end of the bolt (1) is provided with a primary locking section (14) and a front end section (15) respectively, and the diameter of the front end section (15) is larger than that of the primary locking section (14) and the secondary locking section (6) respectively.

3. The expansion bolt capable of effectively avoiding loosening according to claim 1, wherein an L-shaped opening (16) is formed in one side of the upper end of the expansion sleeve (5), a T-shaped wrench (17) is used in cooperation with the expansion sleeve (5), a circular hole (18) is formed in the inner bottom of the T-shaped wrench (17), and an L-shaped pulling block (19) corresponding to the L-shaped opening (16) is arranged on one side of the bottom of the T-shaped wrench (17).

4. An expansion bolt capable of effectively avoiding loosening as claimed in claim 1, wherein the front surface of the sliding plate (11) is provided with two groups of inclined strip-shaped sliding grooves (20), and the rear ends of the two groups of fixing heads (13) are respectively arranged on the two groups of inclined strip-shaped sliding grooves (20) in a sliding manner through sliding blocks.

5. Expansion bolt effective against loosening according to claim 1, characterized in that the bottom of the expansion sleeve (5) is provided with a number of openings (21) parallel to the axial direction of the bolt (1).