Square hole countersunk head knurled sawtooth screw

Abstract

The utility model discloses a square hole countersunk knurled serrated screw, which belongs to the technical field of square hole countersunk knurled serrated screws and is characterized in that a screw body comprises a screw rod, one end of the screw rod is fixedly connected with a screw head, the bottom of the screw head is provided with reinforcing teeth, the top of the screw head is provided with a square groove and a cross groove, and the surface of the screw rod is movably connected with a positioning piece. According to the square hole countersunk knurled sawtooth screw, the square groove, the cross groove and the polygonal groove are formed in the screw head, so that the square hole countersunk knurled sawtooth screw can be assembled and disassembled through drill bits of different shapes, meanwhile, the material consumption of the square hole countersunk knurled sawtooth screw can be reduced, and the cost is reduced. And through the arranged positioning piece, positioning of the square hole countersunk knurled sawtooth screw during installation is facilitated, meanwhile, the square hole countersunk knurled sawtooth screw can be automatically separated and separated through extrusion force of the square hole countersunk knurled sawtooth screw, and use convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to square hole countersunk knurled sawtooth screw technical field, more specifically, relate to a square hole countersunk knurled sawtooth screw. BACKGROUND

[0002] Screw is also called screw, is the part of construction machinery, and the screw is various, including square hole countersunk knurled sawtooth screw, and the square hole countersunk knurled sawtooth screw is a kind of fastener with special design and function.

[0003] At present, common square hole countersunk knurled sawtooth screw can only be assembled and disassembled by square wrench or square drill bit in use process, has certain limitation, and its auxiliary positioning assembly structure is complicated, and inconvenient to use, for example, the square hole countersunk super-long knurled sawtooth screw disclosed in the publication No.

[0004] From the above-mentioned disclosure scheme, the square hole countersunk super-long knurled sawtooth screw is provided with square hole at one end, so that it can only be rotated and assembled and disassembled by special square wrench or square drill bit, which reduces its application range, and the square hole countersunk super-long knurled sawtooth screw is positioned by the shell, the limiting mechanism and the clamping plate, but the structure is complicated, which not only increases the cost, but also makes it difficult to disassemble the shell and other components after the square hole countersunk super-long knurled sawtooth screw is tightened, which may affect the use of the square hole countersunk super-long knurled sawtooth screw. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model aims at providing a square hole countersunk knurled sawtooth screw, which is provided with square groove, cross groove and polygonal groove on the screw head, so that the square hole countersunk knurled sawtooth screw can be assembled and disassembled by different shaped drill bits, the material consumption of the square hole countersunk knurled sawtooth screw can be reduced, the positioning of the square hole countersunk knurled sawtooth screw during installation can be facilitated by the positioning member, and the square hole countersunk knurled sawtooth screw can be automatically separated by the extrusion force, so that the use convenience is improved.

[0006] To solve the above problems, the utility model adopts the following technical scheme.

[0007] The utility model provides a kind of square hole countersunk knurled serrated screw, including screw body, the screw body includes screw rod, the one end of the screw rod is fixedly connected with screw head, the bottom of the screw head is provided with reinforcing tooth, the top of the screw head is opened square groove and cross slot, the surface of the screw rod is movably connected with positioning piece, the positioning piece includes first connecting part and second connecting part, and gap is reserved between the first connecting part and the second connecting part, the square groove, the cross slot and the polygonal recess of the screw head are arranged, so that the square hole countersunk knurled serrated screw can be assembled and disassembled by different shaped drill bits, while reducing the material usage of the square hole countersunk knurled serrated screw, and the positioning piece is arranged, which facilitates the positioning of the square hole countersunk knurled serrated screw during installation, and the square hole countersunk knurled serrated screw can be automatically separated and separated by extrusion force, improving the convenience of use.

[0008] Further, the first connecting part and the second connecting part are provided with connecting surfaces, the surfaces of the connecting surfaces are fixedly connected with connecting blocks, the connecting blocks, the first connecting part and the second connecting part are made of hard engineering plastic, and the connecting blocks, the first connecting part and the second connecting part are integrally formed by injection molding, so that the structure is simple and the batch production cost is low.

[0009] Further, the first connecting part and the second connecting part have the same structure, the first connecting part and the second connecting part are provided with anti-skid plates, and the bottom of the anti-skid plate is provided with anti-skid lines.

[0010] Further, the surface of the anti-skid plate is fixedly connected with a support pipe, the middle position of the support pipe is provided with a guide hole, and the inner wall of the guide hole is movably connected with the surface of the screw rod.

[0011] Further, the other end of the support pipe is fixedly connected with a guide sleeve, one end of the guide sleeve is provided with a guide groove, the guide groove is trumpet-shaped, the guide groove is communicated with the guide hole, has a guiding effect, and improves the insertion and assembly efficiency with the screw rod.

[0012] Further, the square groove and the cross slot are coaxial, the bottom of the square groove is opened with a polygonal recess, so that various wrenches and drill bits can be used to rotate the screw body, and the material usage of the screw body is reduced.

[0013] Further, the reinforcing tooth is inclined and evenly distributed in a ring shape, so that the fastening strength of the screw body can be increased.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] (1) The square groove, the cross groove and the polygonal recess provided by the screw head of the scheme not only enable the square hole countersunk knurled serrated screw to be assembled and disassembled by different shaped drill bits, but also reduce the material usage of the square hole countersunk knurled serrated screw.

[0016] (2) The positioning member provided by the scheme not only facilitates the positioning of the square hole countersunk knurled serrated screw during installation, but also automatically separates and disengages through the extrusion force of the square hole countersunk knurled serrated screw, thereby improving the use convenience. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Fig. 2 It is a schematic diagram of the first connecting part structure of the utility model;

[0019] Fig. 3 It is a top view of the screw head structure of the utility model.

[0020] Explanation of reference numerals in the drawings:

[0021] 1, screw body; 11, screw rod; 12, screw head; 13, square groove; 14, cross groove; 15, polygonal recess; 16, reinforcing tooth; 2, positioning member; 3, first connecting part; 31, anti-skid plate; 32, support pipe; 33, guide sleeve; 34, connecting surface; 35, connecting block; 36, guide hole; 37, guide groove; 4, second connecting part; 5, gap. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. 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 those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] Please refer to Figs. 1-3The utility model provides a kind of square hole countersunk head knurling sawtooth screw, including screw body 1, screw body 1 includes screw rod 11, one end of screw rod 11 is fixedly connected with screw head 12, the bottom of screw head 12 is provided with reinforcing tooth 16, reinforcing tooth 16 is inclined, and it is annular equidistant distribution, can increase the fastening strength of screw body 1, the top of screw head 12 is opened with square groove 13 and cross slot 14, square groove 13 and cross slot 14 coaxial, the bottom of square groove 13 is opened with polygonal recess 15, it is convenient to use multiple spanner and drill bit to rotate screw body 1, and it reduces the material quantity of screw body 1, square groove 13 can be rotated by square drill bit or square spanner, cross slot 14 can be rotated by cross spanner or cross drill bit, polygonal recess 15 can be rotated by polygonal spanner or polygonal drill bit, it is convenient to use different tools to rotate the screw body 1 and dismount, the surface of screw rod 11 movably connects with positioning piece 2, positioning piece 2 includes first connecting part 3 and second connecting part 4, and gap 5 is reserved between first connecting part 3 and second connecting part 4, gap 5 is convenient to reduce the connecting area, to make first connecting part 3 and second connecting part 4 automatically break apart under the extrusion of screw head 12, and separate from the connection of screw body 1.

[0025] First connecting part 3 and second connecting part 4 are provided with connecting face 34, connecting face 34 is fixedly connected with connecting block 35, connecting block 35, first connecting part 3 and second connecting part 4 are made of hard engineering plastics, connecting block 35, first connecting part 3 and second connecting part 4 are integrally formed by injection molding, simple structure, low batch production cost, first connecting part 3 and second connecting part 4 are same in structure, first connecting part 3 and second connecting part 4 are provided with antiskid plate 31, the bottom of antiskid plate 31 is provided with anti-skid lines, and antiskid plate 31 can increase the friction intensity with the surface of wall, to avoid offset when installing screw body 1.

[0026] The surface of antiskid plate 31 is fixedly connected with support tube 32, the middle position of support tube 32 is provided with guide hole 36, the inner wall of guide hole 36 is movably connected with the surface of screw rod 11, guide hole 36 can avoid that screw rod 11 is skewed when being tightened with wall, the other end of support tube 32 is fixedly connected with guide sleeve 33, one end of guide sleeve 33 is provided with guide slot 37, guide slot 37 is in the shape of horn, guide slot 37 is communicated with guide hole 36, has the effect of guiding, improves the insertion assembly efficiency with screw rod 11.

[0027] The square hole countersunk knurled jagged screw is used, first holding the positioning piece 2 with hand, the anti-skid plate 31 is contacted and extruded with wall, simultaneously, the connecting point is coaxial with it, then the drill bit is inserted with the screw head 12, then the screw head 12 is rotated clockwise by the drill bit, the screw rod 11 one end is screwed into the wall, in the process of screwing the screw head 12 into the wall, the limitation of the guide hole 36 makes it not inclined to screw into the wall, when the screw rod 11 continues to screw into the wall, the screw head 12 extrudes the guide sleeve 33 downwards, then the guide sleeve 33 is extruded and deformed downwards, then the first connecting part 3 and the second connecting part 4 are broken and separated from the gap 5, then the screw body 1 continues to screw into the wall, the top of the screw head 12 does not protrude from the wall surface, the square groove 13, the cross groove 14 and the polygonal recess 15 arranged on the screw head 12 not only make the square hole countersunk knurled jagged screw can be assembled and disassembled by different shaped drill bits or wrenches, but also reduce the material consumption of the square hole countersunk knurled jagged screw, and the positioning piece 2 arranged not only facilitates the positioning of the square hole countersunk knurled jagged screw during installation, but also can be automatically separated and separated by the extrusion force of the square hole countersunk knurled jagged screw, improving the use convenience.

[0028] The above is only the preferred specific implementation of the present application; but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the improvement concept of the present application, should be covered in the protection scope of the present application.

Claims

1. A square hole countersunk knurled toothed screw, comprising a screw body (1), the screw body (1) comprising a screw shank (11), one end of the screw shank (11) being fixedly connected with a screw head (12), the bottom of the screw head (12) being provided with a reinforcing tooth (16), characterized in that: The top of the screw head (12) is provided with a square groove (13) and a cross groove (14), the surface of the screw rod (11) is movably connected with a positioning piece (2), the positioning piece (2) comprises a first connecting part (3) and a second connecting part (4), and a gap (5) is reserved between the first connecting part (3) and the second connecting part (4).

2. A square recessed countersunk knurled and toothed screw according to claim 1, characterized in that: The first connecting part (3) and the second connecting part (4) are provided with connecting surfaces (34), the connecting surfaces (34) are fixedly connected with connecting blocks (35), and the connecting blocks (35), the first connecting part (3) and the second connecting part (4) are all made of hard engineering plastics.

3. A square recessed countersunk knurled and toothed screw as claimed in claim 1, characterized in that: The first connecting part (3) and the second connecting part (4) are the same in structure, the first connecting part (3) and the second connecting part (4) are provided with anti-skid plates (31), and the bottom of the anti-skid plate (31) is provided with anti-skid lines.

4. A square recessed countersunk knurled and toothed screw as claimed in claim 3, characterized in that: The surface of the anti-skid plate (31) is fixedly connected with a supporting pipe (32), the middle position of the supporting pipe (32) is provided with a guide hole (36), and the inner wall of the guide hole (36) is movably connected with the surface of the screw rod (11).

5. A square recessed countersunk knurled and toothed screw according to claim 4, characterized in that: The other end of the supporting pipe (32) is fixedly connected with a guide sleeve (33), one end of the guide sleeve (33) is provided with a guide groove (37), and the guide groove (37) is in the shape of a horn.

6. A square recessed countersunk knurled and toothed screw as claimed in claim 1, characterized in that: The square groove (13) and the cross groove (14) are coaxial, and the bottom of the square groove (13) is provided with a polygonal groove (15).

7. A square recessed countersunk knurled and toothed screw as claimed in claim 1, characterized in that: The reinforcing teeth (16) are inclined and are annularly and equidistantly distributed.

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