CN220523015U - Countersunk head self-drilling screw - Google Patents

Abstract

The utility model discloses a countersunk head self-drilling screw which comprises a screw body, wherein the screw body consists of a countersunk head seat, a screw rod and a self-drilling machine, the countersunk head seat, the screw rod and the self-drilling machine are integrally formed, screw threads are arranged on conical surfaces of the countersunk head seat and the self-drilling machine, a groove for a straight screwdriver to insert is formed in the top of the countersunk head seat, and a screw thread drill is arranged on the surface of the self-drilling machine, so that a plate can be perforated in advance, and the phenomenon of cracking of the plate caused by extrusion of the screw rod in the middle part is reduced. According to the utility model, the locking rod is arranged in the countersunk head seat, and the saw teeth are arranged at the end part of the countersunk head seat, so that the fastened plate is locked by utilizing the elastic action of the spring and the V-shaped elastic piece, and the locking force of the plate is increased; the conical surfaces of the countersink seat and the countersink tail are provided with fine threads, when the countersink tail is screwed into the plate, the countersink tail can be easily screwed into the plate, and when the countersink seat is screwed into the plate, the engagement of the plate is more fastened, and the anti-slip performance is better when the countersink tail is matched with the locking rod.

Description

Countersunk head self-drilling screw

Technical Field

The utility model belongs to the technical field of fasteners, and particularly relates to a countersunk head self-drilling screw.

Background

Countersunk head screws, also called countersunk head screws, are also called flat machine screws, are a building part. The head is a 90-degree cone, and is similar to a common wood screw, and the head is provided with a tool tightening groove, such as a straight line, a cross, an inner hexagon, a quincuncial shape, a pentagon shape and the like. Screws are all connecting pieces used for connecting two objects, and generally the head of the screw protrudes above the surface of the connected objects, so that the surface is out of flatness. The countersunk head screw can be sunk under the surface to make the surface smooth, and a harder object needs to drill a countersink at the corresponding position of the countersink. In short, countersunk heads are the heads of the screws that can keep the surface flat after installation.

The patent document with the publication number CN211059161U discloses a countersunk head with scraper self-drilling screw, which comprises a pan head, wherein a screw rod is fixedly arranged at one end of the pan head, a pan opening is formed at the other end of the pan head, threads are arranged on the screw rod, a self-drilling tail is arranged at one end, far away from the pan head, of the screw rod, and a plurality of scrapers are circumferentially arranged on the screw rod and the pan head.

Although the countersunk head belt scraper self-drilling screw can solve the corresponding technical problem, the scraper is arranged on the surface of the pan head in the using process, so that materials can be scraped out in advance, and although the countersunk head can be sunk into a gypsum board easily, the countersunk head belt scraper self-drilling screw possibly causes the phenomena of insufficient locking force, unstable plate connection, falling off and the like.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a countersunk head self-drilling screw so as to solve the technical defects of the conventional countersunk head self-drilling screw with a scraper.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the countersunk head self-drilling screw comprises a screw body, wherein the screw body is composed of a countersunk head seat, a screw rod and a self-drilling body, the countersunk head seat, the screw rod and the self-drilling body are integrally formed, fine threads are arranged on conical surfaces of the countersunk head seat and the self-drilling body, and a groove for a straight screwdriver to insert is formed in the top of the countersunk head seat.

As a preferable scheme of the utility model, the two sides of the groove at the top of the faucet seat are provided with the placing grooves, the placing grooves at the two sides are respectively provided with the fixed stop blocks, the middle parts of the fixed stop blocks are connected with the locking rods in a sliding manner, one ends of the locking rods penetrate through the inclined surfaces of the faucet seat, the surfaces of the locking rods are integrally formed with the fixed blocks, and the springs are arranged between the fixed blocks and the placing grooves.

As a preferable scheme of the utility model, a V-shaped elastic piece is fixedly connected between the locking rods at the left side and the right side, and a V-shaped limiting block is arranged at the bottom of the groove.

As a further preferable mode of the utility model, one end of the locking rod is integrally formed with saw teeth.

As a preferable scheme of the utility model, the two sides of the drill tail are integrally formed with the threaded drill.

As a preferred embodiment of the present utility model, the surface of the screw is provided with fine threads.

Compared with the prior art, the countersunk head self-drilling screw provided by the utility model has the following beneficial effects:

1. the surface of the drill tail is provided with the threaded drill bit, so that the plate can be perforated in advance, and the cracking phenomenon of the plate caused by extrusion of the middle screw is reduced.

2. The inside locking pole that sets up of countersunk head seat and set up the sawtooth at its tip, utilize the elastic action of spring, V type shell fragment, can lock the panel after fastening, increase its locking force.

3. The conical surfaces of the countersink seat and the countersink are provided with fine threads, when the countersink is screwed into the plate, the countersink can be easily screwed into the plate, and when the countersink seat is screwed into the plate, the engagement of the plate is more fastened, and the anti-slip performance is better when the countersink seat is matched with the locking rod.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only examples of embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Reference numerals:

1-countersunk head seat, 101-locking rod, 102-placing groove, 103-fixed block, 104-spring, 105-fixed stop block, 106-V-shaped shrapnel, 107-V-shaped limiting block, 108-saw tooth, 2-screw, 201-coarse thread, 3-drill tail, 301-thread drill bit and 5-groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the implementation routine of the present utility model is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; may be a communication between the interiors of two elements; either directly or indirectly through intermediaries, the specific meaning of the terms in the embodiments of the utility model will be understood by those skilled in the art in the specific case.

Referring to fig. 1, an embodiment of the utility model is a countersunk head self-drilling screw, comprising: the screw body comprises a countersunk head seat 1, a screw rod 2 and a drill tail 3, wherein the countersunk head seat 1, the screw rod 2 and the drill tail 3 are integrally formed, fine threads are arranged on conical surfaces of the countersunk head seat 1 and the drill tail 3, and a groove 5 for a straight screwdriver to insert is formed in the top of the countersunk head seat 1.

Referring to fig. 2-3, placing grooves 102 are formed in two sides of a groove 5 at the top of the holder 1, fixed stop blocks 105 are respectively arranged in the placing grooves 102 on two sides, a locking rod 101 is slidably connected in the middle of each fixed stop block 105, one end of each locking rod 101 penetrates through an inclined plane of the holder 1, a fixed block 103 is integrally formed on the surface of each locking rod 101, and a spring 104 is arranged between each fixed block 103 and each placing groove 102. By providing two placement grooves 102 in the inside of the holder 1, the locking rod 101 slides in the holder 1 and the fixed stopper 105, and the locking rod 101 can always abut against the plate material without external force interference by the expansion and contraction force of the spring 104.

Referring to fig. 2-3, a V-shaped elastic piece 106 is fixedly connected between the locking rods 101 at the left side and the right side, a V-shaped limiting block 107 is arranged at the bottom of the groove 5, the V-shaped elastic piece 106 and the V-shaped limiting block 107 are in movable contact when in use, when a straight screwdriver is inserted into the groove 5 to fasten a self-drilling screw by utilizing the V-shaped elastic piece 106, the tip of the straight screwdriver enables the V-shaped elastic piece 106 to move downwards to drive two sides of the V-shaped elastic piece 106 to shrink inwards synchronously, so that the bottom of the V-shaped elastic piece is abutted against the C-shaped limiting block 107 to limit, and the straight screwdriver is easy to rotate and is not easy to slip.

Referring to fig. 3, one end of the locking lever 101 is integrally formed with serrations 108. By providing the serrations 108, the frictional force of the connection thereof is increased, thereby enhancing the locking force of the locking lever 101.

Referring to fig. 4, the two sides of the drill tail 3 are integrally formed with a screw drill 301. The plate can be pre-drilled, so that the stress of the screw rod 2 screwed into the plate is reduced, and the cracking of the surface of the plate caused by the extrusion of the screw rod 2 is reduced. Referring to fig. 2, the surface of the screw 2 is provided with fine threads. The thread pitch of the fine teeth on the surface of the screw rod 2 is small, the biting force is strong, the self-locking performance is better, and the thread is not easy to slide after locking.

The working principle of the embodiment of the present utility model is briefly described below: when the self-drilling screw is fastened, the straight screwdriver is inserted into the groove 5 of the socket 1 to rotate, meanwhile, the tip of the straight screwdriver is inserted into the middle of the V-shaped elastic piece 106, so that the V-shaped elastic piece 106 is stressed to be downwards contacted with the V-shaped limiting block 107, two sides of the V-shaped elastic piece 106 are driven to synchronously shrink, and accordingly locking rods 101 at two sides are driven to shrink inwards, sawteeth 108 on the locking rods 101 retract into the socket 1, the straight screwdriver inserted on the V-shaped elastic piece 106 is loosened, the locking rods 101 extend outwards under the shrinkage force of the springs 104, accordingly, the sawteeth 108 on the locking rods 101 clamp plates, further plates are locked, and the locking force of the self-drilling screw is enhanced.

While the basic principles of the present utility model have been shown and described, the foregoing is provided by way of illustration of a preferred embodiment of the utility model, and not by way of limitation, the foregoing embodiment and description are merely illustrative of the principles of the utility model, and any modifications, equivalents, improvements or modifications not within the spirit and scope of the utility model should be included within the scope of the utility model.

Claims (6)

1. The countersunk head self-drilling screw is characterized in that: comprising the following steps:

the screw body, the screw body includes countersunk head seat (1), screw rod (2) and brill tail (3), countersunk head seat (1), screw rod (2) and brill tail (3) are integrated into one piece design, countersunk head seat (1) and brill tail (3) are located respectively screw rod (2) both ends, countersunk head seat (1) and brill tail (3)'s conical surface all are equipped with the fine thread, recess (5) that supplies a word screwdriver male are seted up at countersunk head seat (1) top.

2. A countersunk head self-drilling screw as in claim 1, wherein: the two sides of the groove (5) at the top of the countersink seat (1) are provided with a placing groove (102), the placing grooves (102) at the two sides are respectively provided with a fixed stop block (105), the middle part of the fixed stop block (105) is connected with a locking rod (101) in a sliding way, one end of the locking rod (101) penetrates through the inclined surface of the countersink holder (1), a fixing block (103) is integrally formed on the surface of the locking rod (101), and a spring (104) is arranged between the fixing block (103) and the placing groove (102).

3. A countersunk head self-drilling screw as in claim 2, wherein: v-shaped elastic pieces (106) are fixedly connected between the locking rods (101) on the left side and the right side, and V-shaped limiting blocks (107) are arranged at the bottoms of the grooves (5).

4. A countersunk head self-drilling screw as in claim 2, wherein: one end of the locking rod (101) is integrally formed with saw teeth (108).

5. The countersunk head self-drilling screw as in claim 4, wherein: the two sides of the drill tail (3) are integrally formed with a threaded drill (301).

6. The countersunk head self-drilling screw as in claim 4, wherein: the surface of the screw rod (2) is provided with fine threads.