Combined screw with anchor structure

Abstract

The utility model relates to the technical field of screws, in particular to a combined screw with an anchor structure, which comprises a screw sleeve, an anchor head formed at the bottom of a bolt sleeve and capable of deforming under stress, a connecting disc formed at the top of the screw sleeve, an outer hexagonal head formed at the top of the connecting disc, and a concave circular groove formed in the outer hexagonal head. A circular ring sleeve is movably sleeved in the circular groove, and a screw hole is axially formed in the bolt sleeve; a top cover for shielding the circular groove is detachably mounted at the top of the outer hexagonal head, a guide connecting rod is formed at the bottom of the top cover, and a guide connecting hole allowing the guide connecting rod to be inserted is formed in the top of the outer hexagonal head; during installation, the bolt sleeve is installed at a specified hole position through the outer hexagonal head, then the screw rod knob inserted into the screw hole, the screw rod axially moves downwards, the anchor head radially bends outwards, anchoring is achieved, after installation is completed, the top cover shields the circular groove, the probability that the screw head is corroded and oxidized can be reduced, the structure of the top of the screw head is effectively protected, and the service life of the screw head is prolonged. And subsequent knob dismounting is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw technical field especially relates to a combined screw with anchor structure. BACKGROUND

[0002] Expansion bolt is a special threaded connecting piece used for fixing pipeline support, hanging, bracket or equipment on wall, floor or column, which uses wedge slope to promote expansion to generate frictional gripping force to achieve fixing effect.

[0003] The expansion bolt in the prior art Chinese public patent (authorization announcement number: CN215908208U) comprises a screw rod, an expansion pipe and a nut, the expansion pipe is sleeved outside the screw rod, the tail part of the expansion pipe is provided with a gap, the outer peripheral wall of the nut is provided with a protruding rib, the nut is threadedly connected with the screw rod, and the tail part of the expansion pipe is adapted to be expanded.

[0004] The end part of the bolt head of the existing anchor structure screw is exposed outward after installation, and the cross-shaped opening or the character-shaped head structure will disappear after long-term corrosion of rainwater, so that the teeth are easy to slip during subsequent disassembly with a tool, thereby causing disassembly trouble. UTILITY MODEL CONTENTS

[0005] The utility model aims at the shortage of the prior art to provide a combined screw with anchor structure.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A combined screw with anchor structure, comprising a screw sleeve, a bolt sleeve bottom is formed with an anchor head capable of stress deformation, a connecting disc is formed on the top of the screw sleeve, an outer hexagonal head is formed on the top of the connecting disc, the outer hexagonal head is formed with an inner concave circular groove, a circular ring sleeve is movably sleeved in the circular groove, a screw hole is axially formed on the bolt sleeve, a screw rod is installed in the screw hole by a knob, a guide structure is formed on the bottom of the screw rod, which bends the anchor head radially outward, an outer hexagonal head top detachably installs a top cover that covers the circular groove, a guide connecting rod is formed on the bottom of the top cover, an outer hexagonal head top is formed with a guide connecting hole for inserting the guide connecting rod.

[0008] Further, a first external thread structure is formed on the outer ring of the screw sleeve along the axial direction.

[0009] Further, a part of the screw hole is formed with an internal thread structure, and the upper half of the screw rod is formed with a second external thread structure which is threadedly connected with the internal thread structure of the internal thread structure of the screw hole.

[0010] Further, the guide structure comprises a guide block formed in the inner end of the anchor head, and a first inclined surface is formed on the top of the guide block and slidably matched with the bottom of the screw rod.

[0011] Further, the bottom of the screw rod is formed with a second inclined surface slidably matched with the first inclined surface.

[0012] Further, the outer hexagonal head is provided with a screw connection structure arranged in the radial direction.

[0013] Further, the screw connection structure comprises a first radial hole formed in the outer hexagonal head in the radial direction and a second radial hole formed in the circular ring sleeve in the radial direction, and a radial bolt is arranged between the first radial hole and the second radial hole.

[0014] Further, the number of the first radial hole and the second radial hole is six, the diameter of each second radial hole is different, the diameter of the first radial hole is larger than that of the second radial hole, and the included angle of the adjacent two first radial holes and the adjacent two second radial holes is the same.

[0015] Further, the bottom of the top cover is further formed with a circular block embedded into the circular groove.

[0016] The beneficial effects of the utility model are as follows: during installation, the bolt sleeve is first installed into the specified hole position through the outer hexagonal head, then the screw rod knob inserted into the screw hole is rotated, the screw rod is axially moved downward, the anchor head is driven to be radially bent outward through the guide structure, anchoring is realized, the bolt sleeve can be prevented from loosening, the stability of installation is increased, after installation is completed, the top cover is matched with the guide connection hole of the outer hexagonal head through the guide connection rod, the circular groove is shielded, the probability that the screw head is corroded and oxidized can be reduced, the structure of the top of the screw head is effectively protected, and subsequent knob disassembly is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic view of the combined screw.

[0018] Fig. 2 It is a sectional structural schematic view of the combined screw.

[0019] The reference signs comprise:

[0020] 1-bolt sleeve,

[0021] 11-first external thread structure, 12-screw hole, 13-screw rod, 14-internal thread structure,

[0022] 15-second external thread structure, 16-anchor head, 17-guide block, 18-first inclined surface, 19-second inclined surface,

[0023] 2-screw connection structure,

[0024] 21 - hexagonal head, 22 - circular groove, 23 - circular ring sleeve, 24 - first radial hole, 25 - second radial hole,

[0025] 26 - top cover, 27 - guide connecting rod, 28 - guide connecting hole, 29 - circular block. DETAILED DESCRIPTION

[0026] The utility model is described in detail below in combination with the drawings.

[0027] As Figs. 1-2 shown, a combined screw with anchor structure, including screw sleeve 1, the bottom of bolt sleeve is formed with anchor head 16 that can be stressed to deform, the top of screw sleeve 1 is formed with connecting disc, the top of connecting disc is formed with hexagonal head 21, hexagonal head 21 is formed with concave circular groove 22, circular groove 22 is movably sleeved with circular ring sleeve 23, bolt sleeve is axially formed with screw hole 12, screw hole 12 is rotatably installed with screw rod 13, the bottom of screw rod 13 is formed with guide structure that drives anchor head 16 to bend radially outwardly;The top of hexagonal head 21 is detachably installed with top cover 26 that shields circular groove 22, the bottom of top cover 26 is formed with guide connecting rod 27, the top of hexagonal head 21 is formed with guide connecting hole 28 for guide connecting rod 27 to insert.

[0028] When installing, first bolt sleeve is installed to the specified hole position through hexagonal head 21, then screw rod 13 is inserted into screw hole 12 and screwed, screw rod 13 moves axially downward, guide structure drives anchor head 16 to bend radially outwardly, realizes anchor connection, can prevent screw sleeve 1 from loosening, increases the stability of installation, after installation is completed, top cover 26 is shielded circular groove 22 by cooperating with the guide connecting hole 28 of hexagonal head 21 through guide connecting rod 27, can reduce the probability that screw head is corroded and oxidized, effectively protects the structure of the top of screw head, facilitates subsequent screwing and dismounting.

[0029] Specifically, the outer ring of screw sleeve 1 is axially formed with first external thread structure 11, when installing screw sleeve 1, hexagonal head 21 is twisted by hexagonal handle, screw sleeve 1 is matched with hole position by first external thread structure 11, can be embedded into the hole position that needs to be installed.

[0030] Specifically, a part of screw hole 12 is formed with internal thread structure 14, the upper half of screw rod 13 is formed with second external thread structure 15 that is screwed with the internal thread structure 14 of internal thread structure 14 of screw hole 12;When screwing screw rod 13, screw rod 13 is screwed with the internal thread structure 14 in screw hole 12 by second external thread structure 15, screw rod 13 can move axially downward, drive guide structure and cat head to cooperate.

[0031] Specifically, the guide structure comprises a guide block 17 formed in the inner end of the anchor head 16, a first inclined surface 18 is formed on the top of the guide block 17 and is in sliding fit with the bottom of the screw rod 13, the bottom of the screw rod 13 is formed with a second inclined surface 19 in sliding fit with the first inclined surface 18, when the screw rod 13 moves axially downward, the second inclined surface 19 at the bottom of the screw rod 13 is in sliding fit with the first inclined surface 18 of the guide block 17, the anchor head 16 is thus expanded and bent radially, and can be further embedded and connected with the hole wall of the hole position, thereby further ensuring the stability of the anchoring with the hole position.

[0032] The outer hexagonal head 21 is provided with a radial screw connection structure 2. The screw connection structure 2 comprises a first radial hole 24 radially formed in the outer hexagonal head 21 and a second radial hole 25 radially formed in the circular ring sleeve 23, and a radial bolt is arranged between the first radial hole 24 and the second radial hole 25. When the screw sleeve 1 is installed, the circular ring sleeve 23 can be rotated, one of the first radial holes 24 is axially aligned with one of the second radial holes 25, a screw is inserted, and the bolt is connected with the hole wall of the hole position, thereby further increasing the stability of the installation and reducing the probability of loosening of the screw sleeve 1.

[0033] Preferably, the number of the first radial holes 24 and the second radial holes 25 is six, the hole diameter of each second radial hole 25 is different, the hole diameter of the first radial hole 24 is larger than that of the second radial hole 25, and the included angle of the adjacent two first radial holes 24 and the adjacent two second radial holes 25 is the same. Different sizes of bolts can be selected according to the hole diameter of the hole wall of the hole position, and the first radial hole 24 of the corresponding size is selected to match, thereby realizing diversified selection.

[0034] The top cover 26 is further formed with a circular block 29 embedded into the circular groove 22, after the screw sleeve 1 is installed in place, the top cover 26 is installed, the circular groove 22 is shielded by the cooperation of the guide connection hole 28 of the outer hexagonal head 21 and the guide connection rod 27 of the top cover 26, and the circular block 29 is embedded into the circular groove 22, thereby achieving shielding.

[0035] As can be seen from the above, the utility model has the excellent characteristics described above, and can improve the performance of the prior art and has practicality, and becomes a product with high practical value.

[0036] The above content is only a preferred embodiment of the utility model, and for those skilled in the art, the specific embodiment and application range can be changed according to the idea of the utility model, and the content of the specification should not be understood as limiting the utility model.

Claims

1. A combined screw with an anchor structure, comprising a screw sleeve, the bottom of the screw sleeve being formed with an anchor head capable of being deformed under force, characterized in that: The screw sleeve top is formed with a connecting disc, the connecting disc top is formed with an external hexagonal head, the external hexagonal head is formed with an inner recessed circular groove, the circular groove is movably sleeved with a circular ring sleeve, the screw sleeve is axially formed with a screw hole, the screw hole is rotatably installed with a screw rod, the screw rod bottom is formed with a guide structure which is radially outward bent with the anchor head; the external hexagonal head top is detachably installed with a top cover which shields the circular groove, the top cover bottom is formed with a guide connecting rod, the external hexagonal head top is formed with a guide connecting hole for the guide connecting rod insertion.

2. The combination screw with an anchor structure according to claim 1, wherein: The screw sleeve outer ring is axially formed with a first external thread structure.

3. The combination screw with an anchor structure according to claim 2, wherein: The screw hole is partially formed with an internal thread structure, and the screw rod upper half is formed with a second external thread structure which is threadedly matched with the internal thread structure of the screw hole internal thread structure.

4. The combination screw with an anchor structure according to claim 3, wherein: The guide structure comprises a guide block formed in the anchor head inner end, and the guide block top is formed with a first inclined surface which is slidably matched with the screw rod bottom.

5. The combination screw with an anchor structure according to claim 4, wherein: The screw rod bottom is formed with a second inclined surface which is slidably matched with the first inclined surface.

6. The combination screw with an anchor structure according to claim 1, wherein: The external hexagonal head is provided with a radially arranged screw connecting structure.

7. The combination screw with an anchor structure according to claim 6, wherein: The screw connecting structure comprises a first radial hole radially formed in the external hexagonal head and a second radial hole radially formed in the circular ring sleeve, and a radial bolt is arranged between the first radial hole and the second radial hole.

8. The combination screw with an anchor structure according to claim 7, wherein: The number of the first radial hole and the second radial hole is six, the aperture of each second radial hole is different, the aperture of the first radial hole is larger than that of the second radial hole, and the included angle of the adjacent two first radial holes and the adjacent two second radial holes is the same.

9. The combination screw with an anchor structure according to claim 1, wherein: The top cover bottom is further formed with a circular block which is embedded into the circular groove.

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