CN212900427U

CN212900427U - Self-locking foundation bolt

Info

Publication number: CN212900427U
Application number: CN202021205557.6U
Authority: CN
Inventors: 戚士华
Original assignee: Yangzhou Forest Auto Parts Co ltd
Current assignee: Yangzhou Forest Auto Parts Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-04-06
Anticipated expiration: 2030-06-24

Abstract

The utility model discloses a self-locking foundation bolt relates to foundation bolt technical field, the screw rod comprises a screw rod, the screw rod is vertical placing, the screw rod screw thread has been seted up at the top of screw rod outer wall, the outer wall swing joint of screw rod has the self-locking piece, the self-locking piece perpendicular to screw rod screw thread just is connected with the outer wall rotation of screw rod, the outer wall of screw rod screw thread is provided with the nut, the axle center department of screw rod has seted up the thread groove, the inner wall threaded connection of thread groove has the inner screw rod. This auto-lock rag bolt, the same and the pitch of screw thread shape through the auto-lock piece that sets up is slightly greater than the screw thread, because there is the clearance between the screw thread, can the nut normally rotate when normal use, when the nut is receiving heavy load or the vibration of work, the outer wall that the screw rod can be surrounded to the auto-lock piece can be done small amplitude and is rotated, make the surface of auto-lock piece laminate mutually with the outer wall of nut thread, increase the frictional force between auto-lock piece and nut thread, make the nut can't continue to rotate again, in order to reach the effect of auto-lock.

Description

Self-locking foundation bolt

Technical Field

The utility model relates to a rag bolt technical field specifically is a auto-lock rag bolt.

Background

Anchor bolts are screw rods for fastening equipment and the like to a concrete foundation. Generally, the foundation facilities such as be used for railway, highway, electric power enterprise, mill, mine, bridge, tower crane, large-span steel construction and large building, among the worker civil engineering work progress, when needs installation large-scale equipment, all need be in advance to set up the built-in fitting in earlier stage construction stage usually, when carrying out equipment fixing in the later stage, with every mounting point position of equipment respectively with every built-in fitting fixed connection, what make equipment can stabilize installs on the building element, nevertheless various rag bolt still has various problems on the market.

But the current rag bolt still has the condition that the nut can become flexible because of reasons such as work piece vibration after the installation work piece, and the safety effect is poor, and inconvenient problem during the installation, for this reason we provide a auto-lock rag bolt.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a auto-lock rag bolt possesses the auto-lock, and not hard up condition can appear in the nut having solved simple to operate's advantage, and inconvenient problem when installing.

The utility model discloses a solve above-mentioned technical problem, provide following technical scheme: a self-locking foundation bolt comprises a screw rod, wherein the screw rod is vertically arranged, screw rod threads are arranged at the top of the outer wall of the screw rod, a self-locking block is movably connected to the outer wall of the screw rod and is perpendicular to the screw rod threads and is rotatably connected with the outer wall of the screw rod, a nut is arranged on the outer wall of the screw rod threads, a thread groove is formed in the axis of the screw rod, an inner screw rod is in threaded connection with the inner wall of the thread groove, an inner hexagonal socket is formed in the top of the inner screw rod, an inner cavity is formed in the bottom of the thread groove, a limiting plate is fixedly connected to the inner wall of the inner cavity, a plug is arranged at the bottom of the inner screw rod, the plug is positioned in the center of the inner cavity and is fixedly connected with the lower end of the inner screw rod, a locking mechanism perpendicular to the plug, the locking mechanism's inside is provided with the card strip, the one end fixedly connected with compact heap of plug is kept away from to the card strip, the other end that the compact heap was kept away from to the card strip has seted up the arc wall, the rectangular channel has been seted up to the outer wall of card strip.

Further, the thread pitch of the self-locking block is slightly larger than that of the screw thread.

Through adopting above-mentioned technical scheme, under the condition that does not influence normal use, when receiving heavily to press, the great auto-lock piece of pitch can contact the inner wall of nut earlier.

Further, the inner wall of the nut is provided with nut threads, and the inner wall of the nut threads is meshed with the outer wall of the self-locking block.

Through adopting above-mentioned technical scheme, can block with the nut screw thread from the locking piece when receiving heavy load, increase frictional force and accomplish the auto-lock.

Furthermore, the number of the clamping strips is four, and the clamping strips are uniformly distributed around the arc-shaped groove.

Through adopting above-mentioned technical scheme, the card strip can open to four directions, carries on spacingly and fixed, fixed more firm to the screw.

Further, the inner wall fixedly connected with spring that the arc wall is close to the rectangular channel, the inner wall of rectangular channel is provided with the spacing ring, the inner wall of rectangular channel and the outer wall sliding connection of spacing ring, the other end that the arc wall was kept away from to the spring and the inner wall fixed connection of rectangular channel.

Through adopting above-mentioned technical scheme, the design of spring can give a thrust of card strip when withdrawing to reach the effect that can conveniently retrieve the device.

Furthermore, the outer wall of the pressing block is fixedly connected with a friction strip.

Through adopting above-mentioned technical scheme, frictional force when the friction strip can increase the installation.

Compared with the prior art, this auto-lock rag bolt possesses following beneficial effect:

1. the utility model discloses a same and the pitch of the self-locking piece that sets up and screw rod screw thread is slightly greater than the screw rod screw thread, because there is the clearance between the screw thread, can the nut normally rotate when normal use, when the nut is receiving heavy load or the vibration of work, the outer wall that the screw rod can be surrounded to the self-locking piece does the rotation of small amplitude, makes the surface of self-locking piece laminate mutually with the outer wall of nut screw thread, increase frictional force makes the nut can't continue to rotate again to reach the effect of auto-lock.

2. The utility model discloses an in putting into the concrete hole of beating with the screw rod is vertical, during the rotation of interior screw rod, with thread groove threaded connection, make interior screw rod along thread groove downstream, the arc wall is withstood to the plug, and the inclined plane of plug provides the outside tension of card strip, makes the card strip outwards open, and the inner wall of concrete is pressed close to the compact heap, and the rubbing strip increases frictional force, and the installation is more firm when making simple to operate to reach the effect of being convenient for the installation.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a partial sectional view of the structure of the present invention;

FIG. 3 is a partial cross-sectional view of the structural locking mechanism of the present invention;

fig. 4 is an enlarged view of the structure locking mechanism of the present invention.

In the figure: 1. a screw; 2. screw threads; 3. a nut; 4. a self-locking block; 5. an inner screw rod; 6. a locking mechanism; 7. a thread groove; 8. a nut thread; 9. an inner hexagonal socket; 10. an inner cavity; 11. a limiting plate; 12. clamping the strip; 13. a compression block; 14. rubbing the strips; 15. a spring; 16. a limiting ring; 17. a plug; 18. an arc-shaped slot; 19. a rectangular groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a self-locking foundation bolt comprises a screw rod 1, the screw rod 1 is vertically arranged, a screw rod thread 2 is arranged at the top of the outer wall of the screw rod 1, a nut 3 is arranged on the outer wall of the screw rod thread 2, a self-locking block 4 is movably connected to the outer wall of the screw rod 1, the thread pitch of the self-locking block 4 is slightly larger than that of the screw rod thread 2, when the self-locking block 4 with a larger thread pitch is pressed again under the condition that normal use is not influenced, the inner wall of the nut 3 can firstly contact the inner wall of the nut 3, a nut thread 8 is arranged on the inner wall of the nut 3, the inner wall of the nut thread 8 is meshed with the outer wall of the self-locking block 4, the self-locking block 4 is clamped with the nut thread 8 when the self-locking block is pressed again, friction force is increased to complete self-locking, the self-locking block 4 is perpendicular to the screw rod thread 2 and is rotatably connected with the outer wall of the, because there is the clearance between the screw thread, can nut 3 normally rotate when normal use, but nut 3 is when receiving heavy load or the vibration of work, and the small amplitude rotation can be made around the outer wall of screw rod 1 to from locking piece 4, makes the surface of self-locking piece 4 laminate mutually with the outer wall of nut screw thread 8, increases frictional force, makes nut 3 can no longer continue to rotate to reach the effect of auto-lock.

Wherein, the inner wall of the thread groove 7 is connected with an inner screw rod 5 by thread, the top of the inner screw rod 5 is provided with an inner hexagonal socket 9, the bottom of the thread groove 7 is provided with an inner cavity 10, the inner wall of the inner cavity 10 is fixedly connected with a limit plate 11, the bottom of the inner screw rod 5 is provided with a plug 17, the plug 17 is positioned at the center of the inner cavity 10 and is fixedly connected with the lower end of the inner screw rod 5, a locking mechanism 6 which is vertical to the plug 17 is arranged right below the plug 17, the outer wall of the locking mechanism 6 is in sliding connection with the outer wall of the limit plate 11, the inside of the locking mechanism 6 is provided with four clamping strips 12, the clamping strips 12 are uniformly distributed around the arc-shaped groove 18, the clamping strips 12 can be opened towards four directions to limit and fix the screw rod 1, the fixation is more firm, one end of the clamping strip 12 far away from the plug 17 is fixedly connected, the friction strip 14 can increase the friction force during installation, the other end of the clamping strip 12, which is far away from the pressing block 13, is provided with an arc-shaped groove 18, the outer wall of the clamping strip 12 is provided with a rectangular groove 19, the inner wall of the rectangular groove 19, which is close to the arc-shaped groove 18, is fixedly connected with a spring 15, the inner wall of the rectangular groove 19 is provided with a limit ring 16, the inner wall of the rectangular groove 19 is in sliding connection with the outer wall of the limit ring 16, the other end of the spring 15, which is far away from the arc-shaped groove 18, is fixedly connected with the inner wall of the rectangular groove 19, the design of the spring 15 can provide a thrust force for the clamping strip 12 during recovery, so as to achieve the effect of conveniently recovering the device, the clamping strip 12 is outwards stretched by vertically placing the screw rod 1 into a drilled concrete hole, the inner screw rod 5 is in threaded connection with the threaded groove 7 when rotating, so that the inner screw rod 5 moves downwards along the threaded groove, the compact heap 13 is pressed close to the inner wall of concrete, and rubbing strip 14 increases frictional force, makes simple to operate's installation more firm simultaneously to reach the effect convenient to install.

When the self-locking nut is used, the screw rod 1 is vertically placed in a drilled concrete hole, the inner screw rod 5 is in threaded connection with the threaded groove 7 when rotating, the inner screw rod 5 moves downwards along the threaded groove 7, the plug 17 abuts against the arc-shaped groove 18, the inclined plane of the plug 17 provides outward tension for the clamping strip 12, the clamping strip 12 is opened outwards, the pressing block 13 is close to the inner wall of concrete, the friction strip 14 increases friction force, the installation is convenient, when the nut 3 is subjected to heavy pressure or working vibration, the self-locking block 4 can rotate around the outer wall of the screw rod 1 in a small amplitude, the surface of the self-locking block 4 is attached to the outer wall of the nut thread 8, the friction force is increased, and the nut 3 cannot rotate continuously.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A auto-lock rag bolt includes screw rod (1), its characterized in that: the screw rod (1) is vertically placed, the top of the outer wall of the screw rod (1) is provided with screw rod threads (2), the outer wall of the screw rod (1) is movably connected with a self-locking block (4), the self-locking block (4) is perpendicular to the screw rod threads (2) and is rotatably connected with the outer wall of the screw rod (1), the outer wall of the screw rod threads (2) is provided with a nut (3), the axis of the screw rod (1) is provided with a thread groove (7), the inner wall of the thread groove (7) is in threaded connection with an inner screw rod (5), the top of the inner screw rod (5) is provided with an inner hexagonal socket (9), the bottom of the thread groove (7) is provided with an inner cavity (10), the inner wall of the inner cavity (10) is fixedly connected with a limiting plate (11), the bottom of the inner screw rod (5) is provided with a plug (17), the plug (17) is positioned at the center of the inner, be provided with under plug (17) with plug (17) looks vertically locking mechanism (6), the outer wall of locking mechanism (6) and the outer wall sliding connection of limiting plate (11), the inside of locking mechanism (6) is provided with card strip (12), the one end fixedly connected with compact heap (13) of plug (17) are kept away from to card strip (12), arc wall (18) have been seted up to the other end that compact heap (13) were kept away from to card strip (12), rectangular channel (19) have been seted up to the outer wall of card strip (12).

2. A self-locking anchor bolt according to claim 1, wherein: the thread pitch of the self-locking block (4) is slightly larger than that of the screw thread (2).

3. A self-locking anchor bolt according to claim 1, wherein: nut screw thread (8) are seted up to the inner wall of nut (3), the inner wall of nut screw thread (8) and the outer wall meshing of self-locking piece (4).

4. A self-locking anchor bolt according to claim 1, wherein: the number of the clamping strips (12) is four, and the clamping strips (12) are uniformly distributed around the arc-shaped groove (18).

5. A self-locking anchor bolt according to claim 1, wherein: inner wall fixedly connected with spring (15) that rectangular channel (19) are close to arc wall (18), the inner wall of rectangular channel (19) is provided with spacing ring (16), the inner wall of rectangular channel (19) and the outer wall sliding connection of spacing ring (16), the other end that arc wall (18) were kept away from in spring (15) and the inner wall fixed connection of rectangular channel (19).

6. A self-locking anchor bolt according to claim 1, wherein: and the outer wall of the pressing block (13) is fixedly connected with a friction strip (14).