CN211059161U

CN211059161U - Countersunk head screw with scraper and drill tail

Info

Publication number: CN211059161U
Application number: CN201921721475.4U
Authority: CN
Inventors: 屠乾宏; 林乾来; 曹江华
Original assignee: Shanghai Hongting Fastener Manufacturing Co ltd
Current assignee: Shanghai Hongting Fastener Manufacturing Co ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-07-21
Anticipated expiration: 2029-10-11

Abstract

The utility model relates to a countersunk head area scraper bores tail screw belongs to the technical field of fastener, and it includes the coiled head, the one end fixed mounting of coiled head has the screw rod, the dish mouth has been seted up to the other end of coiled head, be provided with the screw thread on the screw rod, the screw rod is kept away from the one end of coiled head is installed and is bored the tail, its characterized in that: and a plurality of scrapers are circumferentially arranged on the screw rod and the pan head. The utility model discloses have can sink into the gypsum board completely when carrying out the installation of gypsum board in, and be difficult to cause the effect of the stress concentration of gypsum board.

Description

Countersunk head screw with scraper and drill tail

Technical Field

The utility model belongs to the technical field of the technique of fastener and specifically relates to a countersunk head area scraper bores tail screw.

Background

Fasteners, also known as standard parts on the market, are a general term for a class of mechanical parts used in fastening two or more parts into one piece. It features various varieties and specifications, different functions and usages, and very high standardization, serialization and universalization degree. The fastener is the most widely used mechanical basic member and has a large demand.

When the gypsum board is installed, a self-drilling screw is often used, the tail part of the self-drilling screw is in a self-drilling or pointed tail shape, auxiliary processing is not needed, drilling, tapping and locking can be directly carried out on the setting material and the base material, and the construction time is greatly saved. Compared with common screws, the screw has high drawing force and holding force, can not loosen after being combined for a long time, and is easy to operate after safe punching and tapping are carried out at one time.

Chinese patent for CN208040875U for the bulletin number, it discloses a countersunk head cross drill tail screw, including coiled head, screw rod, drill tail, steel sheet and waterproof pad, a tip of screw rod with coiled head fixed connection, another tip and drill tail fixed connection of screw rod, the coiled head adopts cylinder hexagon or circular countersunk head structure, the coiled head upper surface is equipped with cross dish mouth, the steel sheet is installed to coiled head below, is equipped with the through-hole on the steel sheet, the through-hole with the coaxial cooperation of screw rod, be equipped with the shaft hole on the waterproof pad, waterproof pad upper end and steel sheet lower extreme cooperation, shaft hole and the coaxial cooperation of screw rod, be equipped with the screw thread of equidistant range on the screw rod.

The above prior art solutions have the following drawbacks: when the gypsum board is constructed and installed, the self-drilling screw is generally screwed into the gypsum board directly, and the self-drilling screw is required to be sunk into the gypsum board so as not to affect the aesthetic property of the surface of the gypsum board. Among the above-mentioned technical scheme, direct extrusion force through the coiled hair extrudees the gypsum board around boring the self screw to also sink into the gypsum board with boring the coiled hair of self screw. The gypsum board at the pan head is easy to form by extrusion of the pan head, and a stress concentration area exists, so that the gypsum board is easy to crack due to stress concentration in a long-term use process, and the mounting stability and safety of the gypsum board are affected, so that the self-drilling screw can be completely sunk into the gypsum board during mounting of the gypsum board, and the stress concentration of the gypsum board is not easy to cause.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a countersunk head area scraper bores tail screw, it has can sink into the gypsum board completely when carrying out the installation of gypsum board in, and is difficult to cause the effect of the stress concentration of gypsum board.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a countersunk head area scraper bores tail screw, includes the coiled head, the one end fixed mounting of coiled head has the screw rod, the dish mouth has been seted up to the other end of coiled head, be provided with the screw thread on the screw rod, the screw rod is kept away from the one end of coiled head is installed and is bored the tail, the screw rod with a plurality of scrapers are installed to circumference on the coiled head.

Through adopting above-mentioned technical scheme, when carrying out the installation of gypsum board, directly will bore the tail screw and twist into the gypsum board, bore the tail rotation this moment and in order to form drilling on the gypsum board, in screw rod also the screw in gypsum board afterwards, when scraper and gypsum board contact, rotatory scraper can scrape the gypsum board around the screw rod down, along with the continuous precession of scraper, a heavy first groove of final scraper scraping out on the gypsum board, then the coiled hair can sink in the heavy first groove. Because a countersunk groove is directly scraped on the gypsum board through the scraper, the disc head sunk into the countersunk groove can not form overlarge extrusion force on the surrounding gypsum board, so that the stress concentration of the gypsum board near the countersunk groove is small, and the quality problems of cracking and the like caused by stress concentration of the gypsum board are reduced.

The utility model discloses further set up to: the scraper is spirally arranged, and the screwing direction of the scraper is the same as that of the threads on the screw rod.

By adopting the technical scheme, the screw-in direction of the scraper is opposite to the screw-in direction of the screw thread on the screw, so that when the scraper is in contact with a gypsum board, the spiral scraper can more easily scrape the gypsum board, and the possibility that the scraper scrapes off a large gypsum board can be reduced due to the existence of the spiral angle. The spiral scraper can also have a guiding effect on scraped gypsum scraps, so that the gypsum scraps are easy to discharge, and the stress concentration caused by extrusion of the pan head and the gypsum scraps is reduced.

The utility model discloses further set up to: the pan head on one side of the scraper close to the screwing direction is also provided with a powder discharge groove for gypsum scraps scraped by the scraper to pass through.

Through adopting above-mentioned technical scheme, if the gypsum piece that is scraped off by the scraper remains in countersunk head groove, take place the extrusion with the coiled hair easily, and transmit the extrusion force of coiled hair to the gypsum board on every side to form local stress concentration. The additionally arranged powder discharge groove is matched with the spiral scraper, so that gypsum scraps scraped by the scraper can be conveniently discharged.

The utility model discloses further set up to: and a scraping blade is further arranged on one side, close to the powder discharge groove, of the scraper, and the scraping blade is located at one end, far away from the screw rod and the disc head, of the scraper.

By adopting the technical scheme, the scraper is installed on the scraper, so that the scraper is matched with the scraper, gypsum boards around the screw rod can be scraped off more easily, the labor intensity of workers is reduced, and the possibility that the gypsum boards are damaged by scraping off large gypsum boards by the scraper is reduced.

The utility model discloses further set up to: the thickness of the scraper close to one end of the scraper is larger than that of the scraper far away from one end of the scraper, and a plurality of grooves are formed in one sides of the scraper and the side, far away from the screw and the pan head, of the scraper.

By adopting the technical scheme, the thickness of the scraping blade is reduced from being close to the scraping blade to being far away from the scraping blade, so that a wedge-shaped cutting edge is formed, and the cutting capability of the scraping blade on the gypsum board can be further improved. And a plurality of grooves arranged on the scraping blade and the scraping blade enable the inner side wall of the countersunk head groove to form a plurality of reinforcing ribs so as to support the inner side wall of the countersunk head groove, and further improve the stability of the gypsum board around the countersunk head groove.

The utility model discloses further set up to: the drill tail comprises an installation rod connected with the screw rod, a plurality of drill cutters are circumferentially installed on the peripheral side wall of the installation rod, and the drill cutters form a chip removal channel.

Through adopting above-mentioned technical scheme, a plurality of drill cutters link to each other and easily drill on the gypsum board, and the chip removal passageway that adjacent drill cutter formed is convenient for the drill cutter to bore the discharge of the gypsum piece down.

The utility model discloses further set up to: the plurality of drill cutters are arranged spirally, the screwing direction of the drill cutters is the same as that of the threads of the screw, and one end, far away from the screw, of each drill cutter is provided with a cutting edge.

Through adopting above-mentioned technical scheme, the degree of difficulty of drilling on the gypsum board has further been reduced to the drill bit of spiral setting, and because the existence of drill bit helix angle, thereby can reduce the drill bit and bore down the possibility that leads to the gypsum board to damage with big gypsum board. The additional arrangement of the cutting edge can further reduce the difficulty of drilling on the plasterboard.

The utility model discloses further set up to: and a positioning tip is also arranged on the drill knife between the blade tips.

By adopting the technical scheme, the positioning tip is used for pre-positioning, the possibility of deviation of the mounting position of the whole self-drilling screw is reduced, and therefore the mounting precision is improved, and the mounting quality of the gypsum board is improved.

To sum up, the utility model discloses a beneficial technological effect does:

1. through additionally arranging the scraper, a countersunk groove for the pan head to sink into is scraped on the gypsum board, so that the extrusion to the gypsum board when the pan head sinks into the gypsum board can be reduced, and the stress concentration on the gypsum board is reduced;

2. the scraping blade is arranged on the scraping blade, so that the cutting capability of the scraping blade on the gypsum board is improved, and the scraping blade is easy to open a countersunk groove on the gypsum board;

3. the scraper and the inner wall of the countersunk groove formed by the scraper are provided with the raised reinforcing ribs by forming the groove on the scraper so as to support the countersunk groove, so that the stability of the gypsum board is improved;

4. the drill is arranged in a spiral shape, and the cutting edge is arranged on the drill, so that the difficulty of drilling on the gypsum board can be reduced, and the damage to the gypsum board can also be reduced;

5. through the installation location point, can improve the installation accuracy of boring tail screw to improve the installation quality of gypsum board.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

In the figure, 1, a pan head; 11. a cross pan head; 2. a screw; 21. a thread; 3. a scraper; 31. scraping a blade; 32. a groove; 34. a powder discharge groove; 4. drilling a tail; 41. mounting a rod; 42. drilling a cutter; 43. a chip removal channel; 44. a blade tip; 45. and (4) positioning the tip.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, for the utility model discloses a countersunk head area scraper bores tail screw, including pan head 1 of round platform form, wherein seted up the cross dish mouth on the end lateral wall of the great one end of pan head 1 diameter, and then perpendicular fixed mounting has the screw rod 2 with pan head 1 coaxial line on the end lateral wall of the less one end of pan head 1 diameter, and goes up still circumference on the screw rod 2 and be provided with screw thread 21.

As shown in fig. 1 and 2, four scrapers 3 are circumferentially and equidistantly mounted on the circumferential side wall of the pan head 1 and the circumferential side wall of the screw 2. And the screw direction of the four scrapers 3 is the same as the screw direction of the thread 21 on the screw 2. The side wall of the scraper 3 close to the screwing direction is further provided with a scraper 31, and the scraper 31 is positioned at one end of the scraper 3 far away from the screw rod 2 and the pan head 1. The thickness of the end of the scraping blade 31 close to the scraping blade 3 is larger than that of the end of the scraping blade 31 far away from the scraping blade 3. The ends of the scraper 3 and the scraper 31 far away from the screw rod 2 and the pan head 1 are also provided with a plurality of grooves 32.

The peripheral side wall of the pan head 1 between the adjacent scrapers 3 is also provided with a powder discharge groove 34 for passing gypsum scraps scraped by the scrapers 3.

As shown in fig. 1, a drill tail 4 is installed at one end of the screw rod 2 far away from the pan head 1, the drill tail 4 comprises an installation rod 41 which is connected with the screw rod 2 and is coaxial with the screw rod, four drill bits 42 are installed on the circumferential side wall of the installation rod 41 in the circumferential direction, and two adjacent drill bits 42 form a chip removal channel 43.

The four drill cutters 42 are all arranged spirally, and the screwing direction of the drill cutters 42 is the same as the drilling direction of the thread 21 on the screw rod 2. The end of each drill bit 42 far away from the screw rod 2 is provided with a cutting edge 44, and conical positioning points 45 are arranged on the drill bits 42 and the mounting rod 41 between the four cutting edges 44.

The implementation principle of the embodiment is as follows:

when the gypsum board is installed, the drill tail 4 screws can be pre-positioned on the gypsum board through the positioning tips 45, so that the possibility that the installation positions of the drill tail 4 screws are deviated when the drill tail 4 screws are installed is reduced, the installation precision is improved, and the installation quality of the gypsum board is improved.

While the tip 44 mounted on the drill bit 42 facilitates drilling holes in plasterboard, thereby reducing the difficulty of drilling holes in plasterboard. The helical arrangement of the drill bit 42 further reduces the difficulty of drilling holes in plasterboard and, due to the helix angle of the drill bit 42, reduces the likelihood of the drill bit 42 drilling down large plasterboard pieces which may cause damage to the plasterboard. While the gypsum chips drilled by the tip 44 and the drill bit 42 are discharged through the debris discharge channel 43 formed by the adjacent drill bit 42.

With the continuous drilling of the screw of the drill tail 4, the drill tail 4 and the screw rod 2 are both screwed into the gypsum board, and then the scraper 3 is contacted with the gypsum board at the moment. The rotating scraper 3 can scrape off the gypsum board around the screw rod 2, and along with the continuous precession of the scraper 3, the final scraper 3 scrapes out a countersunk head groove on the gypsum board, and then the pan head 1 can sink into the countersunk head groove. Because a countersunk groove is directly scraped on the gypsum board through the scraper 3, the disk head 1 sinks into the countersunk groove and cannot form overlarge extrusion force on the surrounding gypsum board, so that the stress concentration of the gypsum board near the countersunk groove is small, and the quality problems of cracking and the like of the gypsum board caused by the stress concentration are reduced.

And because the screw-in direction of the scraper 3 is opposite to the screw-in direction of the screw thread 21 on the screw 2, when the scraper 3 contacts with the gypsum board, the spiral scraper 3 can scrape off the gypsum board more easily, and because of the spiral angle, the possibility that the scraper 3 scrapes off the large gypsum board can be reduced. The spiral scraper 3 also has a guiding effect on the scraped gypsum chips to cooperate with the powder discharge chute 34 for discharging the gypsum chips. Thereby reducing the possibility of stress concentration caused by the gypsum chips remaining in the countersunk grooves, causing the pan head 1 to be pressed against the gypsum chips, and transmitting the pressing force of the pan head 1 to the surrounding through the gypsum chips.

In the process, the scraping blade 31 arranged on the scraper 3 is matched with the scraper 3, so that gypsum boards around the screw rod 2 can be scraped off more easily, the labor intensity of workers is reduced, and the possibility that the scraper 3 scrapes off large gypsum boards to damage the gypsum boards is reduced. And the grooves 32 arranged on the scraping blade 31 and the scraping blade 3 enable the inner side wall of the countersunk head groove to form a plurality of reinforcing ribs so as to support the inner side wall of the countersunk head groove, and further improve the stability of the gypsum board around the countersunk head groove.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a countersunk head area scraper bores tail screw, includes coiled hair (1), the one end fixed mounting of coiled hair (1) has screw rod (2), the dish mouth has been seted up to the other end of coiled hair (1), be provided with screw thread (21) on screw rod (2), screw rod (2) are kept away from bore tail (4), its characterized in that are installed to the one end of coiled hair (1): and a plurality of scrapers (3) are circumferentially arranged on the screw rod (2) and the pan head (1).

2. The countersunk head self-drilling screw with the scraper as claimed in claim 1, wherein: the scraper (3) is spirally arranged, and the screwing direction of the scraper (3) is the same as that of the threads (21) on the screw rod (2).

3. The countersunk head self-drilling screw with the scraper as claimed in claim 2, wherein: the pan head (1) on one side of the scraper (3) close to the screwing direction is also provided with a powder discharge groove (34) for gypsum scraps scraped by the scraper (3) to pass through.

4. The countersunk head self-drilling screw with the scraper as claimed in claim 3, wherein: the scraper (3) is close to one side of the powder discharge groove (34) and is further provided with a scraping blade (31), and the scraping blade (31) is located at one end, away from the screw rod (2) and the pan head (1), of the scraper (3).

5. The countersunk head self-drilling screw with the scraper as claimed in claim 4, wherein: the thickness of the scraper blade (31) close to one end of the scraper blade (3) is larger than the thickness of the scraper blade (31) far away from one end of the scraper blade (3), and a plurality of grooves (32) are formed in one side, far away from the screw rod (2) and the pan head (1), of the scraper blade (31) and the scraper blade (3).

6. The countersunk head self-drilling screw with the scraper as claimed in any one of claims 1 to 5, wherein: bore tail (4) including with installation pole (41) that screw rod (2) link to each other, a plurality of drills (42), adjacent two are installed to circumference on the week lateral wall of installation pole (41) drill (42) form chip removal passageway (43).

7. The countersunk head self-drilling screw with the scraper as claimed in claim 6, wherein: the drill cutters (42) are arranged spirally, the screwing direction of the drill cutters (42) is the same as that of the threads (21) of the screw (2), and one end, far away from the screw (2), of each drill cutter (42) is provided with a cutting edge (44).

8. The countersunk head self-drilling screw with the scraper as claimed in claim 7, wherein: a positioning tip (45) is further mounted on the drill bit (42) and the mounting rod (41) between the plurality of cutting tips (44).