Anti-falling anchor bolt

Abstract

The utility model discloses an anti-falling anchor bolt which comprises a screw rod, a bolt body, a bolt body and a bolt body. The bottom of the screw rod is provided with an external thread. The expansion piece is arranged at the top of the screw rod in a sleeving manner; the locking nut is in threaded sleeve connection with the screw rod; the one-way propelling device is rotationally arranged in the screw rod; and the multiple sliding positioning devices are arranged in an annular array. The arrangement mode that the one-way propelling device and the sliding positioning devices are matched is utilized, and the one-way propelling device rotates reversely, so that the one-way propelling device can rotationally push out all the sliding positioning devices, and the sliding positioning devices can stretch out relative to the screw rod; the anchor bolt is effectively prevented from loosening or falling off under vibration or load change, and the stability and safety of the anchor bolt in a high-vibration environment are remarkably improved; meanwhile, the device automatically pushes the sliding positioning device to be tightly attached to the inner wall of the pre-drilled hole when rotating reversely.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of anchor bolt especially relates to a prevent dropping anchor bolt. BACKGROUND

[0002] Anchor bolt refers to the general term of all post-anchoring components, and the range is very wide. According to different raw materials, it is divided into metal anchor bolt and non-metal anchor bolt. According to different anchoring mechanisms, it is divided into expansion anchor bolt, reaming anchor bolt, adhesive anchor bolt, concrete screw, shot pin and concrete nail, and the expansion anchor bolt is usually used.

[0003] The expansion bolt with exposed screw rod needs to predrill holes in the wall before use. The anchor bolt in the prior art relies on double-nut interlocking or spring washer pre-tightening to prevent loosening, but these methods have significant defects: the double-nut structure is complex and occupies a large space, and the spring washer is prone to material fatigue failure. In addition, the reverse rotation resistance of the traditional anchor bolt is limited, and it is easy to loosen or even fall off under vibration or load change. SUMMARY

[0004] The utility model aims at providing a prevent dropping anchor bolt to solve the problems in the above background.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a prevent dropping anchor bolt, comprising:

[0006] Screw rod, the bottom of the screw rod is provided with external threads;

[0007] Expansion sheet, the expansion sheet is sleeved on the top of the screw rod;

[0008] Locking nut, the locking nut is threadedly connected with the screw rod;

[0009] One-way propulsion device, the one-way propulsion device is rotationally arranged in the interior of the screw rod;

[0010] Sliding positioning device, a plurality of sliding positioning devices are arranged in an annular array, and the sliding positioning device is opposite to the end position of the one-way propulsion device, when the one-way propulsion device rotates forward, the screw rod and the sliding positioning device are driven to rotate synchronously, when the one-way propulsion device reversely rotates, each sliding positioning device is pushed out and extruded, so that the sliding positioning device is extended and positioned.

[0011] Preferably, the interior of the screw rod is provided with a circular hole, the top of the circular hole is provided with a rotating cavity, and a plurality of through grooves are arranged in an annular array on the side wall of the rotating cavity.

[0012] Preferably, the one-way propulsion device comprises:

[0013] The rotating rod is connected with the inner cavity of the round hole in a rotating penetrating mode, and the outer part of the rotating rod is provided with an anti-skid sleeve, and the outer wall of the anti-skid sleeve is matched with the inner wall of the round hole.

[0014] The rotating disc is connected with one end of the rotating rod, and the rotating disc is provided in a disc type, and the outer side of the rotating disc is provided with a plurality of extrusion grooves in an annular array, and the extrusion grooves are matched with the sliding positioning device.

[0015] Preferably, the other end of the rotating rod is connected with a rotating head, and the rotating head is provided with a plum blossom groove.

[0016] Preferably, the sliding positioning device comprises:

[0017] The positioning claw is connected with the inner cavity of the through groove in a sliding penetrating mode;

[0018] The moving block is connected with one end of the positioning claw, and the moving block is provided with an inclined surface;

[0019] The sliding bar is connected with the two sides of the positioning claw, and the sliding bar is connected with the screw rod in a sliding penetrating mode.

[0020] Preferably, the other end of the positioning claw is provided with a tooth groove.

[0021] Preferably, the inner cavity of the through groove and the positioning claw are both connected with a stop block, and the adjacent stop blocks are provided in a staggered mode.

[0022] The technical effects and advantages of the present application are as follows:

[0023] The present application utilizes the matched setting mode of the one-way pushing device and the sliding positioning device, and through the reverse rotation of the one-way pushing device, the one-way pushing device can rotate and push out each sliding positioning device, so that the sliding positioning device can be extended relative to the screw rod, and is clamped in the inside of the pre-drilled hole, thereby effectively preventing the anchor bolt from loosening or falling off under vibration or load change, and significantly improving the stability and safety of the anchor bolt in a high-vibration environment; meanwhile, the device automatically pushes the sliding positioning device to tightly adhere to the inner wall of the pre-drilled hole when being reversely rotated, and reliable locking can be realized without additional operation, thereby simplifying the installation and maintenance process; and the sliding positioning device is supported by the rotating disc entity part, so that the sliding positioning device can be provided with entity support, and the continuous clamping force of the sliding positioning device can be ensured, and the anchor bolt can be kept stable in long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the present application.

[0025] Figure 2 It is an internal structure schematic view of the present application.

[0026] Figure 3 It is the internal structure schematic view of one-way pushing device of the utility model.

[0027] Figure 4 It is the overhead structure schematic view of rotating disc of the utility model.

[0028] Figure 5 It is the overhead structure schematic view of sliding positioning device of the utility model.

[0029] In the drawing: 1, screw rod; 2, expansion sheet; 3, locking nut; 4, one-way pushing device; 41, rotating rod; 42, rotating disc; 421, extrusion groove; 5, sliding positioning device; 51, positioning claw; 52, moving block; 53, sliding bar; 501, stop block. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0031] The utility model provides a kind of Figures 1-5The illustrated anti-falling anchor bolt comprises a screw rod 1, an expansion sheet 2, a locking nut 3, a one-way advancing device 4, and a sliding positioning device 5.

[0032] The screw rod 1 is internally provided with a circular hole, and the top of the circular hole is provided with a rotating cavity, and a plurality of through grooves are annularly arranged on the side wall of the rotating cavity.

[0033] The one-way propelling device 4 comprises a rotating rod 41, which is rotatably inserted into the inner cavity of the circular hole, and the outer part of the rotating rod 41 is provided with an anti-skid sleeve, and the outer wall of the anti-skid sleeve is in close contact with the inner wall of the circular hole; a rotating disc 42, which is connected to one end of the rotating rod 41 and is provided in a disc shape, and the outer side of the rotating disc 42 is provided with a plurality of extrusion grooves 421 in an annular array, which are matched with the sliding positioning device 5. The other end of the rotating rod 41 is connected with a rotating head, which is provided with a plum-blossom-shaped groove, and the rotating head is convenient to rotate through a plum-blossom-shaped pick. The inner wall of one side of the extrusion groove 421 is provided with an inclined surface, which is matched with the inclined surface on the moving block 52. When the rotating disc 42 is reversely rotated, the reverse rotation of the extrusion groove 421 is driven, so that the inclined surface of the extrusion groove 421 extrudes the moving block 52, and the positioning claw 51 is linearly extended under the limitation of the through groove. The extension line of the inner wall of the other side of the extrusion groove 421 intersects with the center of the rotating disc 42, so that the surface is tangent to the circumferential direction of the rotating disc 42 when the rotating disc 42 is forwardly rotated, so that the rotation of the rotating disc 42 can make the sliding positioning device 5 clamped between the screw rod 1 and the rotating disc 42, so as to make the rotating disc 42 stable to the rotation of the screw rod 1.

[0034] The sliding positioning device 5 comprises a positioning claw 51, which is slidably inserted into the inner cavity of the through groove; a moving block 52, which is connected to one end of the positioning claw 51 and is provided with an inclined surface; and a sliding bar 53, which is connected to the two sides of the positioning claw 51 and is slidably inserted into the screw rod 1. The sliding insertion of the positioning claw 51 is convenient to extend and grab. The moving block 52 is matched with the inner cavity of the extrusion groove 421, and the sliding insertion of the sliding bar 53 and the screw rod 1 makes the linear motion of the positioning claw 51 more stable. The other end of the positioning claw 51 is provided with a tooth groove, so that the positioning claw 51 grabs the inner wall of the pre-drilled hole, and the grabbing is more stable. The inner cavity of the through groove and the positioning claw 51 are both connected with a stop block 501, and the adjacent stop blocks 501 are provided in a staggered manner. The stop block 501 is made of rubber and can be elastically deformed. The stop block 501 connected to the inner part of the through groove is convenient to limit the stop block 501 connected to the positioning claw 51, so as to prevent the positioning claw 51 from being randomly separated from the inner cavity of the through groove when the rotating rod 41 is not reversely rotated, and the position of the sliding positioning device 5 is more stable.

[0035] It should be pointed out finally: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be contained in the protection scope of the utility model.

Claims

1. An anti-release anchor, characterized in that, Include: Screw rod (1), the bottom of the screw rod (1) is provided with external threads; Expansion sheet (2), the expansion sheet (2) is sleeved on the top of the screw rod (1); Locking nut (3), the locking nut (3) is threadedly sleeved with the screw rod (1); One-way propulsion device (4), the one-way propulsion device (4) is rotationally arranged in the screw rod (1); Sliding positioning device (5), a plurality of sliding positioning devices (5) are arranged in an annular array, and the sliding positioning device (5) is opposite to the end position of the one-way propulsion device (4), when the one-way propulsion device (4) rotates forward, the synchronous rotation of the screw rod (1) and the sliding positioning device (5) is driven, when the one-way propulsion device (4) reversely rotates, each sliding positioning device (5) is pushed out to realize the extension positioning of the sliding positioning device (5).

2. An anti-release anchor according to claim 1, wherein The inside of the screw rod (1) is provided with a circular hole, the top of the circular hole is provided with a rotating cavity, and a plurality of through grooves are arranged in an annular array on the side wall of the rotating cavity.

3. The anti-release anchor according to claim 1, wherein, The one-way propulsion device (4) comprises: Rotating rod (41), the rotating rod (41) is rotationally connected with the inner cavity of the circular hole, the outer part of the rotating rod (41) is sleeved with an anti-skid sleeve, and the outer wall of the anti-skid sleeve is matched with the inner wall of the circular hole; Rotating disc (42), the rotating disc (42) is connected to one end of the rotating rod (41), and the rotating disc (42) is arranged in a disc type, the outer side of the rotating disc (42) is provided with an extrusion groove (421) in an annular array, and the extrusion groove (421) is matched with the sliding positioning device (5).

4. An anti-release anchor according to claim 3, wherein The other end of the rotating rod (41) is connected with a rotating head, and the rotating head is provided with a plum blossom groove.

5. The anti-release anchor according to claim 1, wherein, The sliding positioning device (5) comprises: Positioning claw (51), the positioning claw (51) is slidably connected with the inner cavity of the through groove; Moving block (52), the moving block (52) is connected to one end of the positioning claw (51), and the moving block (52) is provided with an inclined surface; Sliding bar (53), the sliding bar (53) is connected to both sides of the positioning claw (51), and the sliding bar (53) is slidably connected with the screw rod (1).

6. An anti-release anchor according to claim 5, wherein The other end of the positioning claw (51) is provided with a tooth groove.

7. An anti-release anchor according to claim 5, wherein The inner cavity of the through groove and the positioning claw (51) are both connected with a stop block (501), and adjacent stop blocks (501) are arranged in a staggered manner.

Images