CN216430209U - Cross recessed countersunk head drill tail screw - Google Patents

Abstract

The utility model discloses a cross recess countersunk head bores tail screw relates to screw technical field, including the screw body, the outside of screw body is provided with self-tapping screw, the broken end of the bottom middle part fixedly connected with toper structure of screw body, and the bottom outside of screw body is provided with boss structure's transition ring, and the lateral surface fixedly connected with of transition ring is a plurality of transition cutters that are the distribution of annular array, and the transition cutter sets up to the slope structure, and one side of transition cutter is provided with the cutting edge, the broken sword that the equal fixedly connected with slope in both sides of broken end set up. The utility model discloses a set up the transition ring in the bottom of screw body, the outside of transition ring is provided with a plurality of transition cutters, and the setting of transition ring makes the automatic screw can be more smooth and easy brill go into the inslot that broken end was opened out to make the brill of screw go into more smoothly, make the result of use of screw promote.

Description

Cross recessed countersunk head self drilling screw

Technical Field

The utility model relates to a screw technical field, in particular to cross recess countersunk head bores tail screw.

Background

The screw is a tool for fastening the parts of the object step by utilizing the physics and mathematical principles of the inclined circular rotation and friction of the object. The self-drilling screw is a screw with a self-tapping drilling head at the front end of the screw. The screw is a common invention in production and life of people for thousands of years, and is the first invention of human according to the application field. The self-drilling screw is a new invention of people in recent years and is also called a self-drilling screw, 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 setting materials and base materials, 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.

The existing self-drilling screw generally realizes punching and tapping through the broken tip end of the bottom end of the screw and the self-tapping threads outside the screw, and the existing self-drilling screw is not provided with a transition structure between the broken tip end and the self-tapping threads, so that the drilling process of the screw is not smooth enough, and the practicability is not enough. Therefore, it is necessary to invent a cross-recessed countersunk head self-drilling screw to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cross recess countersunk head bores tail screw to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the cross-groove countersunk head self-drilling screw comprises a screw body, wherein self-tapping threads are arranged on the outer side of the screw body, a crushing end with a conical structure is fixedly connected to the middle of the bottom end of the screw body, a transition ring with a boss structure is arranged on the outer side of the bottom end of the screw body, a plurality of transition cutters distributed in an annular array are fixedly connected to the outer side surface of the transition ring, the transition cutters are arranged in an inclined structure, a cutting edge is arranged on one side of each transition cutter, the two sides of each crushing end are fixedly connected with obliquely arranged crushing cutters, a first cutting surface and a second cutting surface are arranged on the outer side of each crushing cutter, the second cutting surface is positioned at the bottom end of the first cutting surface, a convex block is fixedly connected to the outer side surface of the first cutting surface, the convex block is arranged in an inclined structure, a baffle is fixedly connected to the top end of the screw body, and a hexagonal head is fixedly connected to the middle of the upper surface of the baffle, the middle part of the top end of the hexagonal head is provided with a cross groove.

Preferably, the lower surface of the baffle is provided with a plurality of anti-skidding blocks distributed in an annular array, and the anti-skidding blocks are arranged in an inclined structure.

Preferably, the cross slot comprises a transverse slot and a vertical slot, and the length of the transverse slot is greater than that of the vertical slot.

Preferably, the bumps are arranged in a plurality, and the bumps are distributed in an equidistant linear array.

Preferably, the included angle between the first and second facets is 120 °.

Preferably, the angle of inclination of the crushing blade is 30 °.

The utility model discloses a technological effect and advantage:

1. the utility model discloses a set up the transition ring in the bottom of screw body, the outside of transition ring is provided with a plurality of transition cutters, and the setting of transition ring makes automatic screw thread more smoothly bore into the groove that broken end opened out to make the drilling of screw more smoothly, make the result of use of screw promoted;

2. the utility model discloses a set up broken sword in the both sides of broken end, the cooperation of the first cutting surface and the second cutting surface that set up on the broken sword can promote the crushing effect of broken end, through setting up the non slipping spur, has avoided the screw to appear reversing the not hard up condition after screwing up to further promotion the practicality of screw.

Drawings

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

Fig. 2 is a schematic top view of the overall structure of the present invention.

Fig. 3 is a schematic side view of the overall structure of the present invention.

In the figure: 1. a screw body; 2. self-tapping threads; 3. a crushing end; 4. a transition ring; 5. a transition cutter; 51. a blade; 6. a crushing knife; 61. a first facet; 62. a second facet; 63. a bump; 7. a baffle plate; 71. anti-skid blocks; 8. a hexagonal head; 9. a cross groove; 91. a transverse groove; 92. a vertical slot.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a cross recessed countersunk head self-drilling screw as shown in figures 1-3, which comprises a screw body 1, self-tapping threads 2 are arranged on the outer side of the screw body 1, the self-tapping threads 2 are convenient to drill the screw body 1, a crushing end 3 with a conical structure is fixedly connected with the middle part of the bottom end of the screw body 1, a transition ring 4 with a boss structure is arranged on the outer side of the bottom end of the screw body 1, a plurality of transition cutters 5 distributed in an annular array are fixedly connected with the outer side surface of the transition ring 4, the transition cutters 5 are arranged in an inclined structure, a blade 51 is arranged on one side of the transition cutter 5, the transition ring 4 is convenient to insert the self-tapping threads 2 into a groove opened by the crushing end 3, crushing cutters 6 with an inclined arrangement are fixedly connected with the two sides of the crushing end 3, a first blade surface 61 and a second blade surface 62 are arranged on the outer side of the crushing cutters 6, the second blade surface 62 is positioned at the bottom end of the first blade surface 61, the contact of operation face is treated earlier to second flank 62, can set up out the recess, the lateral surface fixedly connected with lug 63 of first flank 61, setting up of lug 63 has made things convenient for first flank 61 to expand the recess, the piece that produces among the fluting process simultaneously can be discharged through the gap between a plurality of lugs 63, lug 63 sets up to the slope structure, the top fixedly connected with baffle 7 of screw body 1, the upper surface middle part fixedly connected with hexagonal head 8 of baffle 7, cross recess 9 has been seted up at the top middle part of hexagonal head 8.

The lower surface of the baffle 7 is provided with a plurality of anti-skidding blocks 71 distributed in an annular array, the anti-skidding blocks 71 are arranged in an inclined structure, the arrangement of the anti-skidding blocks 71 avoids the situation that screws are reversed and loosened after installation is finished, the cross groove 9 comprises a transverse groove 91 and a vertical groove 92, the length of the transverse groove 91 is larger than that of the vertical groove 92, the arrangement of the cross groove 9 facilitates the rotation of the screws by a cross screwdriver, the length of the transverse groove 91 is longer, the rotation of the screws by a straight screwdriver is facilitated for users, the number of lugs 63 is multiple, the lugs 63 are distributed in an equidistant linear array, the included angle between the first blade surface 61 and the second blade surface 62 is 120 degrees, the included angle between the first blade surface 61 and the second blade surface 62 is arranged, so that the second blade surface 62 can cut and slot an operation surface in advance, the first blade surface 61 can expand the slotted groove, and further improve the slotted effect, the drilling of screws is facilitated, the inclination angle of the crushing knife 6 is 30 degrees, and the inclination of the crushing knife 6 enables the crushing effect of the crushing knife 6 to be improved.

The utility model discloses the theory of operation:

this device is when using, down compression screw body 1, screw body 1 drives broken end 3 downstream, insert until the sharp-pointed department of broken end 3 bottoms and treat the operation face, rotation screw body 1, screw body 1 drives broken end 3 and broken sword 6 and rotates, the second cutting edge 62 in the broken sword 6 outside treats the operation face and cuts, make the peripheral recess that produces of sharp-pointed department, continue to rotate screw body 1, first cutting edge 61 can further enlarge the recess, broken end 3 submerges behind the recess completely, transition cutter 5 in the transition ring 4 outside contacts with the lateral wall of recess, the cutting edge 51 of transition cutter 5 one side can cut the lateral wall of recess, thereby made things convenient for self-tapping 2 to get into the recess, after self-tapping 2 gets into the recess, continue to rotate the screw and can realize the tapping work that punches of screw.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. Cross recess countersunk head bores tail screw, including screw body (1), its characterized in that: the outer side of the screw body (1) is provided with self-tapping threads (2), the middle part of the bottom end of the screw body (1) is fixedly connected with a crushing end (3) with a conical structure, the outer side of the bottom end of the screw body (1) is provided with a transition ring (4) with a boss structure, the outer side surface of the transition ring (4) is fixedly connected with a plurality of transition cutters (5) distributed in an annular array manner, the transition cutters (5) are arranged in an inclined structure, one side of each transition cutter (5) is provided with a cutting edge (51), the two sides of the crushing end (3) are fixedly connected with crushing cutters (6) arranged in an inclined manner, the outer side of each crushing cutter (6) is provided with a first cutting surface (61) and a second cutting surface (62), the second cutting surface (62) is positioned at the bottom end of the first cutting surface (61), and the outer side surface of the first cutting surface (61) is fixedly connected with a convex block (63), the screw is characterized in that the bump (63) is of an inclined structure, the top end of the screw body (1) is fixedly connected with a baffle (7), the middle of the upper surface of the baffle (7) is fixedly connected with a hexagonal head (8), and the middle of the top end of the hexagonal head (8) is provided with a cross groove (9).

2. The cross recess countersink drill tail screw of claim 1, wherein: the lower surface of the baffle (7) is provided with a plurality of anti-skidding blocks (71) distributed in an annular array, and the anti-skidding blocks (71) are arranged in an inclined structure.

3. The cross recess countersink drill tail screw of claim 2, wherein: the cross groove (9) comprises a transverse groove (91) and a vertical groove (92), and the length of the transverse groove (91) is larger than that of the vertical groove (92).

4. The cross recess countersink drill tail screw of claim 3, wherein: the bumps (63) are arranged in a plurality, and the bumps (63) are distributed in an equidistant linear array.

5. The cross recess countersink drill tail screw of claim 4, wherein: the included angle between the first edge surface (61) and the second edge surface (62) is 120 degrees.

6. The cross recess countersink drill tail screw of claim 5, wherein: the inclination angle of the crushing knife (6) is 30 degrees.

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