CN220435205U - Self-drilling expansion anchor bolt - Google Patents

Abstract

The utility model relates to the technical field of building assembly parts, and provides a self-drilling expansion anchor bolt which comprises a self-drilling component, an extrusion component, a second rotating component, a first rotating component and a plastic pipe, wherein the self-drilling component is arranged on the self-drilling expansion anchor bolt; according to the utility model, the outer cylinder body and the inner screw rod are rotated sequentially by using different wrenches, the drill bit can be driven to rotate by the plastic pipe when the outer cylinder body rotates, the drill bit can be pushed into the plate under the action of external pressure, a self-drilling hole is formed on the plate, the inner screw rod can be in threaded relation with the outer screw thread and the sliding sleeve when the inner screw rod rotates, meanwhile, the sliding sleeve can linearly slide along the axial direction of the sliding sleeve under the sliding limit of the sliding sleeve by the guide sleeve, and then the expansion strip is extruded by the sliding sleeve, so that the expansion strip expands outwards to expand and break the plastic pipe, the expansion fixation of the self-drilling hole is completed, the drilling hole can be drilled simultaneously when the bolt is installed, and the problems that the bolt is not firmly fixed and cannot be placed due to the fact that the drilling hole is required in advance in the prior art are solved.

Description

Self-drilling expansion anchor bolt

Technical Field

The utility model relates to the technical field of building assembly parts, in particular to a self-drilling expansion anchor bolt.

Background

When in use, the expansion bolt is a special threaded connecting piece for fixing pipelines or equipment on walls, floors and columns, and holes with corresponding sizes are drilled on a fixed body by using an impact electric drill (hammer), 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 nuts.

Through retrieving, application number 201721733359.5 discloses a self-expanding anchor bolt, including the inflation cover, the inflation cover afterbody is equipped with back limiting plate, and the inflation cover is equipped with the inflation hole, and the inflation hole includes screw hole, unthreaded hole, is equipped with the bolt in the inflation cover, and unthreaded hole internal diameter is greater than the screw thread external diameter of bolt, and the bolt afterbody has linked firmly and has revolved the piece, and the inflation cover outer wall of unthreaded hole and screw hole junction is equipped with annular front deformation groove, and front end inner wall is equipped with annular middle deformation groove in the unthreaded hole, and inflation cover outer wall afterbody is equipped with back deformation groove. The anchor bolt utilizes the bolt to compress the expansion sleeve, the expansion sleeve is folded at the front deformation groove, the middle deformation groove and the rear deformation groove when the expansion sleeve is compressed under pressure, the expansion sleeve is convenient to form a clamping structure with the limiting plates on two sides of the fastener, the connection strength is high, the joint area of the expansion sleeve and the fastener is enlarged under the condition that the expansion sleeve is gradually deformed, the sealing performance is better, and a plurality of parts can be disassembled to form other parts when the bolts and the expansion sleeve are utilized to realize disposable fastening.

However, the anchor bolt still has the following problems: before the anchor bolt is installed, the corresponding round hole is drilled on a fixed object or a plate by means of an impact electric drill, and then the bolt is placed into the hole for rotary installation, and uncontrollable factors such as different depths of the hole exist in the punching process, so that the bolt is not firmly fixed, or the hole is inclined, and the bolt cannot be placed.

Disclosure of Invention

The utility model provides a self-drilling expansion anchor bolt, which solves the problems that in the prior art, bolts are not firmly fixed and cannot be placed due to the fact that drilling is needed in advance.

The technical scheme of the utility model is as follows: a self-drilling expansion anchor comprising:

a self-drilling member capable of self-drilling from the outside into the plate material and forming a self-drilling hole on the plate material;

the extrusion part is arranged at the inner end of the self-drilling part in a sliding manner;

the second rotating component is penetrated in the extrusion component and is in threaded fit with the extrusion component;

the first rotating component is rotationally sleeved on the outer side of the second rotating component and is expanded and anchored in the self-drilling hole of the plate under the extrusion of the extrusion component;

and the plastic pipe is used for fixing the self-drilling component and the first rotating component and expanding and breaking the self-drilling component when expanding.

Preferably, the self-drilling component comprises a guide sleeve, a drill bit is fixed at the head end of the guide sleeve, the drill bit is conical, and a drilling spiral is arranged on the surface of the drill bit.

Preferably, the guide sleeve is a hollow cylinder, and the inner cylinder surface is symmetrically provided with sliding grooves.

Preferably, the extrusion part comprises a sliding sleeve, the sliding sleeve is a hollow cylinder and is inserted in the guide sleeve in a sliding manner, limiting blocks are symmetrically fixed on the outer cylindrical surface of the head end of the sliding sleeve, and the limiting blocks are limited in the sliding grooves in a sliding manner.

Preferably, a pressing plate is fixed at the tail end of the sliding sleeve, and the pressing plate is a hollow cone.

Preferably, the second rotating component comprises an inner screw rod, an external thread in threaded connection with the sliding sleeve is arranged at the outer part of the head end of the inner screw rod, and an annular protrusion is arranged at the outer side of the bottom end of the inner screw rod.

Preferably, a second screw head is fixed at the tail end of the inner screw rod, and a second inner hexagonal hole is formed in the bottom surface of the second screw head.

Preferably, the first rotating component comprises an outer cylinder body, a plurality of expansion strips annularly distributed around the inner screw rod are fixed at the head end of the outer cylinder body, an annular groove is formed in the inner side of the outer cylinder body, annular protrusions on the inner screw rod are rotatably arranged in the annular groove, a convex ring is fixed at the tail end of the outer cylinder body, a first screw head is arranged on the bottom surface of the convex ring, and a first inner hexagonal hole is formed in the bottom surface of the first screw head.

The beneficial effects of the utility model are as follows:

according to the utility model, the outer cylinder body and the inner screw rod are rotated sequentially by using different wrenches, the drill bit can be driven to rotate by the plastic pipe when the outer cylinder body rotates, the drill bit can be pushed into the plate under the action of external pressure, a self-drilling hole is formed on the plate, the inner screw rod can be in threaded relation with the outer screw thread and the sliding sleeve when the inner screw rod rotates, meanwhile, the sliding sleeve can linearly slide along the axial direction of the sliding sleeve under the sliding limit of the sliding sleeve by the guide sleeve, and then the expansion strip is extruded by the sliding sleeve, so that the expansion strip expands outwards to expand and break the plastic pipe, the expansion fixation of the self-drilling hole is completed, the drilling hole can be drilled simultaneously when the bolt is installed, and the problems that the bolt is not firmly fixed and cannot be placed due to the fact that the drilling hole is required in advance in the prior art are solved.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic illustration of a self-drilling expansion anchor according to the present utility model;

FIG. 2 is a schematic diagram of the front view of a self-drilling expansion anchor according to the present utility model;

FIG. 3 is a schematic cross-sectional view of the structure at A-A in FIG. 2;

FIG. 4 is a schematic illustration of an exploded construction of a self-drilling expansion anchor according to the present utility model;

FIG. 5 is a schematic view of an exploded view of a self-drilling expansion anchor according to the present utility model from another perspective;

in the figure: 1. a self-drilling component; 11. a guide sleeve; 12. a drill bit; 13. a chute; 2. an extrusion member; 21. a sliding sleeve; 22. a limiting block; 23. a pressure plate; 3. a first rotating member; 31. an outer cylinder; 32. an expansion bar; 33. a convex ring; 34. a first screw head; 35. a first internal hexagonal hole; 4. a second rotating member; 41. an inner screw; 42. an external thread; 43. an annular protrusion; 44. a second screw head; 45. a second internal hexagonal hole; 5. a plastic tube.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, 2 and 3, the present utility model provides a technical solution: a self-drilling expansion anchor bolt comprises a self-drilling component 1, an extrusion component 2, a second rotation component 4, a first rotation component 3 and a plastic pipe 5, wherein the first rotation component 3 rotates, the plastic pipe 5 is carried by the self-drilling component 1 to drill a hole deep in a plate, then the second rotation component 4 rotates reversely, and the extrusion component 2 moves under the threaded fit of the second rotation component 4 and the extrusion component 2 to expand the plastic pipe 5 into the self-drilling hole of the plate.

Referring to fig. 3 and 4, the self-drilling component 1 can self-drill from outside into a plate and form self-drilling on the plate, the self-drilling component 1 comprises a guide sleeve 11, a drill bit 12 is fixed at the head end of the guide sleeve 11, the drill bit 12 is conical and provided with a drilling screw on the surface, the drill bit 12 is rotated and is pushed into the plate under the action of external pressure to form self-drilling on the plate, the guide sleeve 11 is a hollow cylinder, and sliding grooves 13 are symmetrically formed on the inner cylindrical surface.

The extrusion part 2 slides and sets up at the inner from drilling part 1, extrusion part 2 includes sliding sleeve 21, sliding sleeve 21 is hollow cylinder, and slide and insert and locate in the uide bushing 11, the outer cylindrical symmetry of the head end of sliding sleeve 21 is fixed with stopper 22, stopper 22 slides and is spacing in spout 13 for the uide bushing 11 is spacing to the slip of sliding sleeve 21, when the reverse rotation second rotary part 4, through second rotary part 4 and sliding sleeve 21 screw thread relation, simultaneously under the slip spacing of uide bushing 11 to sliding sleeve 21, can make sliding sleeve 21 slide along its axial straight line, the end of sliding sleeve 21 is fixed with pressure disk 23, pressure disk 23 is hollow conical body.

The second rotating component 4 is arranged in the extrusion component 2 in a penetrating manner and is in threaded fit with the extrusion component 2, the second rotating component 4 comprises an inner screw 41, an external thread 42 in threaded connection with the sliding sleeve 21 is arranged outside the head end of the inner screw 41, an annular protrusion 43 is arranged outside the bottom end of the inner screw 41 and used for limiting the rotation of the inner screw 41, a second screw head 44 is fixed at the tail end of the inner screw 41, a second inner hexagonal hole 45 is formed in the bottom surface of the second screw head 44, and the inner screw 41 can be rotated by a wrench matched with the second inner hexagonal hole 45 to complete expansion.

The first rotating component 3 is rotationally sleeved on the outer side of the second rotating component 4 and is expanded and anchored in a self-drilling hole of a plate under the extrusion of the extrusion component 2, the first rotating component 3 comprises an outer cylinder 31, a plurality of expansion strips 32 which are annularly distributed around an inner screw 41 are fixed at the head end of the outer cylinder 31, an annular groove is formed in the inner side of the outer cylinder 31, an annular bulge 43 on the inner screw 41 is rotationally arranged in the annular groove, a convex ring 33 is fixed at the tail end of the outer cylinder 31, a first screw head 34 is arranged on the bottom surface of the convex ring 33, a first inner hexagonal hole 35 is formed in the bottom surface of the first screw head 34, the outer cylinder 31 can be rotated by a wrench matched with the first inner hexagonal hole 35 to complete the drilling hole, the self-drilling hole component 1 and the first rotating component 3 are fixed by the plastic pipe 5, the self-drilling hole is expanded when the self-drilling hole is expanded, the plastic pipe 5 is made of transparent PMMA material, and the bolt state can be conveniently observed.

The working principle and the using flow of the utility model are as follows: when the self-drilling expansion fixture is used, the tip of the drill bit 12 is opposite to a position to be fixed, the outer cylinder 31 is rotated by the spanner matched with the first inner hexagonal hole 35, the drill bit 12 is driven to rotate by the plastic pipe 5, the drill bit 12 is pushed into a plate under the action of external pressure, a self-drilling hole is formed on the plate until the convex ring 33 is in contact with the surface of the plate, then the inner screw 41 is reversely rotated by the spanner matched with the second inner hexagonal hole 45, the sliding sleeve 21 can linearly slide along the axial direction of the sliding sleeve 21 under the sliding limit of the sliding sleeve 21 by the guide sleeve 11, the expansion strip 32 is extruded by the sliding sleeve 21, the expansion strip 32 is outwards expanded to break the plastic pipe 5, and the self-drilling expansion fixing is completed.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (8)

1. A self-drilling expansion anchor comprising:

a self-drilling member (1) capable of self-drilling from the outside into the sheet material and forming a self-drilling hole in the sheet material;

the extrusion part (2) is arranged at the inner end of the self-drilling part (1) in a sliding manner;

the second rotating component (4) is arranged in the extrusion component (2) in a penetrating way and is in threaded fit with the extrusion component (2);

the first rotating part (3) is rotationally sleeved outside the second rotating part (4) and is expanded and anchored in the self-drilling hole of the plate under the extrusion of the extrusion part (2);

and a plastic pipe (5) which fixes the self-drilling component (1) and the first rotating component (3) and is expanded and broken in the self-drilling when expanding.

2. Self-drilling expansion anchor according to claim 1, characterized in that the self-drilling component (1) comprises a guide sleeve (11), the head end of the guide sleeve (11) is fixed with a drill bit (12), the drill bit (12) is conical and the surface is provided with a drilling spiral.

3. A self-drilling expansion anchor according to claim 2, characterized in that the guide sleeve (11) is a hollow cylinder and the inner cylinder is symmetrically provided with sliding grooves (13).

4. A self-drilling expansion anchor according to claim 3, characterized in that the extrusion part (2) comprises a sliding sleeve (21), the sliding sleeve (21) is a hollow cylinder and is slidably inserted into the guide sleeve (11), the outer cylindrical surface of the head end of the sliding sleeve (21) is symmetrically fixed with a limiting block (22), and the limiting block (22) is slidably limited in the sliding groove (13).

5. The self-drilling expansion anchor according to claim 4, characterized in that a pressure plate (23) is fixed at the end of the sliding sleeve (21), and the pressure plate (23) is a hollow cone.

6. The self-drilling expansion anchor bolt according to claim 5, characterized in that the second rotating member (4) comprises an inner screw (41), an external thread (42) in threaded connection with the sliding sleeve (21) is provided outside the head end of the inner screw (41), and an annular protrusion (43) is provided outside the bottom end of the inner screw (41).

7. The self-drilling expansion anchor bolt according to claim 6, characterized in that a second screw head (44) is fixed at the end of the inner screw rod (41), and a second inner hexagonal hole (45) is formed in the bottom surface of the second screw head (44).

8. The self-drilling expansion anchor bolt according to claim 7, wherein the first rotating component (3) comprises an outer cylinder body (31), a plurality of expansion strips (32) annularly distributed around an inner screw rod (41) are fixed at the head end of the outer cylinder body (31), an annular groove is formed in the inner side of the outer cylinder body (31), an annular protrusion (43) on the inner screw rod (41) is rotatably arranged in the annular groove, a convex ring (33) is fixed at the tail end of the outer cylinder body (31), a first screw head (34) is arranged on the bottom surface of the convex ring (33), and a first inner hexagonal hole (35) is formed in the bottom surface of the first screw head (34).