CN112032168B

CN112032168B - Self-tapping screw

Info

Publication number: CN112032168B
Application number: CN202010883408.3A
Authority: CN
Inventors: 陈耀东; 艾钧云; 严浩; 叶辉; 潘金鑫
Original assignee: Zhejiang Quanyou Standard Parts Co ltd
Current assignee: Zhejiang Quanyou Standard Parts Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-03-11
Anticipated expiration: 2040-08-28
Also published as: CN112032168A

Abstract

The invention discloses a self-tapping screw which comprises a head, a rod part and a rod part tail end, wherein first threads are arranged at the rod part and the rod part tail end, a threading hole is formed in the screw, and the threading hole penetrates through the head, the rod part and the rod part tail end to be communicated with the outside.

Description

Self-tapping screw

Technical Field

The invention belongs to the field of screws, and particularly relates to a self-tapping screw.

Background

Self-tapping screws are threaded fasteners that self-tap the mating female threads in a pre-drilled hole of a metallic or non-metallic material. It has the characteristics of high tension, single piece and single side combination. Tapping screws are often used for connecting thin metal plates (steel plates, saw plates, etc.). During connection, a thread bottom hole is firstly formed on the connected piece, and then the tapping screw is screwed into the thread bottom hole of the connected piece. Because the thread surface of the self-tapping screw has higher hardness (more than or equal to 45HRC), internal threads can be tapped in the thread bottom hole of the connected piece, thereby forming connection.

The existing self-tapping screw is usually a self-drilling self-tapping screw, namely a prefabricated hole can be machined in the surface of a product to be fixed, or the prefabricated hole can not be machined, the tail end of a rod part of the self-tapping screw is directly nailed into the product for a certain depth firstly and then is directly screwed into the self-tapping screw, the existing self-tapping screw only can realize the locking and fixing effects, and the function is single.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the self-tapping screw, which can realize the fixation of a product, can realize the threading, does not need to additionally form holes at other positions of the product, and enriches the functions of the screw.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a self-tapping screw, includes head, pole portion and pole portion end, and pole portion end all are provided with first screw thread, be provided with the through wires hole in the screw, the through wires hole runs through head, pole portion and the terminal intercommunication of pole portion external.

Further the pole portion end is round platform form, and the through wires hole is worn out by the center at pole portion end, pole portion end-to-end connection has the drilling portion, and the drilling portion is coniform, and drilling portion back to pole portion end one side is most advanced, drilling portion and pole portion end can be dismantled and be connected.

Further one side of the drilling part facing the tail end of the rod part is provided with a bolt, the bolt stretches into the threading hole, and the matching position of the threading hole and the bolt is a connecting hole.

Furthermore, the bolt is elliptical, and the connecting hole is elliptical.

Further the bolt is in a polygon prism shape, and the connecting hole is in a polygon prism shape.

And a second thread is arranged on the drilling part.

Furthermore, the caliber of the connecting hole gradually increases from inside to outside to form a flaring.

Further, an inner plate screwing groove is formed in the head, and the threading hole is communicated with the inner plate screwing groove.

And an anti-abrasion rubber ring is arranged at one end, close to the inner plate screwing groove, in the threading hole.

Furthermore, magnetic powder or magnets are arranged at the tail end of the rod part and the drill hole part.

Compared with the prior art, the invention has the beneficial effects that: through self-tapping screw through the product (panel) of treating connecting, wherein drilling portion can be in the direct drilling in product surface that does not have prefabricated hole, with the fixed back of product, drilling portion takes off, and the both ends of through wires hole then are located the both sides of product respectively this moment, can wear to establish the electric wire in the through wires hole, need not extra trompil on the product, increase self-tapping screw's function and application range.

Drawings

FIG. 1 is a front view of the self-tapping screw of the present invention;

FIG. 2 is a top plan view of the self-tapping screw of the present invention;

FIG. 3 is a front view of the self-tapping screw of the present invention without a drilling portion;

FIG. 4 is a front view of the drilling portion of the present invention;

FIG. 5 is a bottom view of FIG. 3;

FIG. 6 is a schematic view showing the state of the wire penetrating through the wood board;

fig. 7 is a schematic view of the state of the connection screw only when the connection screw does not penetrate through the wood board.

Reference numerals: 11. a head portion; 12. a rod portion; 121. a first thread; 13. the end of the rod part; 14. threading holes; 141. connecting holes; 15. screwing a groove on the inner plate; 2. drilling a hole part; 21. a second thread; 22. and (4) a bolt.

Detailed Description

Embodiments of the tapping screw of the present invention will be further described with reference to fig. 1 to 7.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.

The utility model provides a self-tapping screw, includes head 11, pole portion 12 and pole portion end 13, and pole portion 12 and pole portion end 13 all are provided with first screw thread 121, be provided with through wires hole 14 in the screw, through wires hole 14 runs through head 11, pole portion 12 and the terminal 13 intercommunication of pole portion external.

In the embodiment taking a self-tapping screw as an example for penetrating and fixing a wood board, as shown in fig. 1, the preferred threading hole 14 of the embodiment is arranged in a straight line along the axis of the screw and is positioned at the center of the screw and coaxial with the screw.

When the bolt is used, the bolt surface is self-threaded like a wood board through the first threads 121, the tail end 13 of the rod part penetrates out of the wood board (one or more than one wood board is laminated), the length of the bolt is selected to be larger than the total thickness of the wood board, two ends of the threading hole 14 are respectively located on two sides of the wood board, and electric wires can be threaded into the threading hole 14 to be used for connecting power supplies or electric appliances on two sides of the wood board.

The rod end 13 is preferably round table-shaped, the threading hole 14 penetrates out from the center of the rod end 13, the rod end 13 is connected with the drilling part 2, the drilling part 2 is conical, the side, back to the rod end 13, of the drilling part 2 is a tip, and the drilling part 2 is detachably connected with the rod end 13.

The drilling part 2 is provided with a tip which can be directly drilled into a wood board without a prefabricated hole, and after the whole screw penetrates through the wood board, the drilling part 2 is taken down, so that two ends of the threading hole 14 are exposed.

In this embodiment, preferably, a bolt 22 is disposed on a side of the drilling portion 2 facing the rod portion end 13, the bolt 22 extends into the threading hole 14, a matching position of the threading hole 14 and the bolt 22 is a connection hole 141, and in this embodiment, a main body portion of the connection hole 141 and a main body portion of the threading hole 14 are in smooth transition.

In the embodiment, the drilling portion 2 can be rotatably connected with the rod end 13, and at this time, as long as the plug 22 and the connecting hole 141 are both circular, when in use, the drilling portion 2 is used to drive the screw into the wood board in a whole manner until the first thread 121 at the rod end 13 contacts the wood board, and then the screw is screwed, during the screwing process, the rod end 13 pushes the drilling portion 2 to advance, and the drilling portion 2 smoothly advances in the wood board through the tip end thereof to reduce the advancing resistance.

Of course, the drilling portion 2 may be fixedly connected to the end 13 of the rod portion in a circumferential direction, and the hollow portion of the plug 22 may be an ellipse or a polygonal column, and the corresponding connecting hole 141 may be an ellipse or a polygonal column.

The drill hole 2 is now rotated synchronously during screwing of the screw head 11.

Preferably, the second screw 21 is provided on the drilling portion 2 when the drilling portion 2 and the rod end 13 are circumferentially fixed, and the drilling portion 2 has a self-screwing function when rotated, wherein the preferred second screw 21 and the first screw 121 have the same specification, and the screw end points of the two can be connected into a whole.

In the preferred embodiment, the aperture of the connecting hole 141 gradually increases from inside to outside to form a flared opening, which is used to facilitate the matching of the plug 22 with the plug, and meanwhile, the bending angle of the wire can be reduced when the wire is inserted, so that the abrasion is reduced.

In the preferred embodiment, the head portion 11 is provided with the inner plate screwing groove 15, and the threading hole 14 is communicated with the inner plate screwing groove 15, as shown in fig. 1, when the inner plate screwing groove 15 is screwed by a tool, the threading hole 14 is not affected, and the threading hole 14 is hidden.

In the preferred threading hole 14 of this embodiment, an anti-abrasion rubber ring is arranged at one end close to the inner plate screwing groove 15, so that when an electric wire passes through the anti-abrasion rubber ring, the abrasion of the electric wire can be reduced.

This embodiment is preferred all be provided with magnetic powder or magnet on pole portion end 13 and the drilling portion 2, magnetic powder or magnet make drilling portion 2 and pole portion end 13 have certain actuation dynamics, avoid automatic dropping.

If the lighting lamp is required to be installed in a wardrobe or a storage cabinet, if the original cabinet is not provided with the lighting lamp, all surfaces of the original cabinet are usually closed, the cabinet door of the cabinet is usually penetrated with an electric wire, and the electric wire is often clamped when the cabinet door is opened or closed, so that the electric wire is very easy to wear, or special drilling equipment is adopted for drilling; as shown in fig. 6 (which may be one or two or more boards), the self-tapping screw may be used in such a manner that the drilling portion 2 is mounted on the end 13 of the rod portion, the tip of the drilling portion 2 is abutted against a portion (a certain closed side) of the electric wire to be threaded, the head 11 is screwed by a screwdriver, the drilling portion 2 is drilled into the cabinet until the end 13 of the rod portion completely penetrates through the side of the cabinet, the drilling portion 2 is removed, and the electric wire is threaded through the threading hole 14.

As shown in fig. 7, when a wire is not required for connecting two or more boards, the drilling part 2 is installed at the end 13 of the shaft, and when the two boards are fixed, the drilling part 2 does not need to penetrate the boards, that is, the drilling part 2 does not need to be removed.

The drilling part 2 is arranged in the invention, so that foreign matters can be prevented from entering the threading hole 14 to cause blockage in the drilling process, and the drilling part 2 can be selectively removed according to the requirement.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a self-tapping screw, is terminal including head, pole portion and pole portion, and pole portion end all are provided with first screw thread, its characterized in that: the screw is internally provided with a threading hole which penetrates through the head part, the rod part and the tail end of the rod part to be communicated with the outside;

the tail end of the rod part is in a circular truncated cone shape, the threading hole penetrates out from the center of the tail end of the rod part, the tail end of the rod part is connected with a drilling part, the drilling part is in a conical shape, one side of the drilling part, back to the tail end of the rod part, is a tip, and the drilling part is detachably connected with the tail end of the rod part;

one side of the drilling part facing the tail end of the rod part is provided with a bolt, the bolt stretches into the threading hole, and the matching position of the threading hole and the bolt is a connecting hole.

2. A self-tapping screw as in claim 1, wherein: the bolt is oval, and the connecting hole is oval.

3. A self-tapping screw as in claim 1, wherein: the plug is in a polygon prism shape, and the connecting hole is in a polygon prism shape.

4. A self-tapping screw as in claim 2 or 3, wherein: and a second thread is arranged on the drilling part.

5. A self-tapping screw as in claim 4, wherein: the connecting hole gradually increases from the inner diameter to the outer diameter to form a flaring.

6. A self-tapping screw as in claim 5, wherein: an inner plate screwing groove is formed in the head, and the threading hole is communicated with the inner plate screwing groove.

7. A self-tapping screw as in claim 6, wherein: an anti-abrasion rubber ring is arranged at one end, close to the inner plate screwing groove, of the threading hole.

8. A self-tapping screw as in claim 7, wherein: and magnetic powder or magnets are arranged at the tail end of the rod part and the drilling part.