CN109654100B

CN109654100B - Screw with a thread

Info

Publication number: CN109654100B
Application number: CN201710941823.8A
Authority: CN
Inventors: 苏国材; 苏昱荣
Original assignee: Taiwan Shan Yin International Co Ltd
Current assignee: Taiwan Shan Yin International Co Ltd
Priority date: 2017-10-11
Filing date: 2017-10-11
Publication date: 2021-04-06
Anticipated expiration: 2037-10-11
Also published as: CN109654100A

Abstract

The invention provides a screw, which is mainly characterized in that a toothless section is formed between a first screw tooth and a guide tooth of a rod body, a cutting edge which is respectively connected with two ends of the first screw tooth and the guide tooth is arranged at the toothless section, so that when locking operation is carried out, the guide tooth can assist a locking part to enter in a locking mode, the toothless section can be used for accommodating chips generated in the locking process, and the cutting edge can assist in chopping wood fibers which are not cut in the screwing entering process, so that the locking resistance is effectively reduced, and the locking efficiency is accelerated and improved.

Description

Screw with a thread

Technical Field

The invention relates to a screw design, in particular to a screw capable of accelerating and improving locking efficiency.

Background

Referring to fig. 1, a screw 1 of the prior art includes a screw head 11, a rod 12 extending outward from the screw head 11, a locking portion 13 opposite to the screw head 11 and formed at the other end of the rod 12, and a screw thread 14 spirally surrounding the rod 12; therefore, when the locking operation is performed, a tool (not shown) is used to drive the screw head 11 to drill into a locking body 2, and the screw teeth 14 are further driven by the rotation of the tool at the locking portion 13 to be continuously screwed into the locking body 13 along with the guidance of the locking portion 13, so as to achieve the effect of locking and positioning.

However, it is found after use that the screw 1 of the prior art can only utilize the locking portion 13 to enter the locking member 2 in a gradual and squeezing manner during the locking process, until the screw thread 14 continues to the locking portion 13 and enters the locking member 2, so that the locking action of screwing in the screw thread 13 can be performed, and therefore, during the locking process, only the cutting action of the screw thread 14 is performed on the fiber of the locking member 2, so that the locking portion 13 is still subjected to the following screwing-in action driven by the screw head 11 to perform the squeezing action on the locking member 2 at the initial stage of the locking, and therefore, not only the fiber of the locking member 2 can not be effectively cut, but also the fiber of the locking member 2 is wound on the rod body 12, so that the locking torque force is greatly increased, and besides the actual locking efficiency being affected, the chips generated by the following screwing-in can not be easily discharged through the chip discharging groove 141 formed between the screw threads 14, therefore, the chips are easy to accumulate in the locking member 2, if the screw 1 is continuously driven by the tool to generate a screwing action on the locking member 2, not only is relatively labor-consuming, but also excessive chips in the locking member 2 are caused to form a compression phenomenon in the locking member 2, so that the locking member 2 is easy to crack, and the improvement is really needed.

Disclosure of Invention

Therefore, an object of the present invention is to provide a screw, which can effectively reduce the generation of locking resistance, thereby accelerating the locking efficiency.

Therefore, the screw of the present invention includes a screw head, a rod body extending outward from the screw head, a locking portion opposite to the screw head and formed at the other end of the rod body, and a first screw thread spirally surrounding the rod body; wherein, the first screw tooth extends from the screw head to the locking part;

the rod body is also provided with a guide tooth extending from the locking part to the screw head, one end of the guide tooth is not connected with the corresponding end of the first screw tooth, so that a tooth-free section is formed between the first screw tooth and the guide tooth, at least one cutting edge is arranged on the tooth-free section, two ends of the cutting edge are respectively connected with the first screw tooth and the guide tooth, and the protruding height of the cutting edge is smaller than the maximum external diameter of the first screw tooth protruding outwards.

As a further improvement of the present invention, at least one cutting edge may be added to the toothless section, and the cutting edge is oriented in the same direction as the screw is screwed in.

As a further improvement of the present invention, a second screw thread interlaced and surrounding the first screw thread is further disposed on the rod body, so that the first and second screw threads are disposed on the rod body in a double-helix manner.

As a further improvement of the present invention, a second screw thread interlaced and surrounding the first screw thread is further disposed on the rod body, so that the first and second screw threads are disposed on the rod body in a double-helix manner, and the second screw thread is connected to one end of the planing edge.

As a further improvement of the present invention, an auxiliary tooth interlaced and surrounding the guiding tooth is further disposed on the locking portion, so that the guiding tooth and the auxiliary tooth are disposed at the locking portion in a double helix manner.

As a further improvement of the present invention, an auxiliary tooth interlaced and surrounding the guiding tooth is further disposed on the locking portion, so that the guiding tooth and the auxiliary tooth are disposed at the locking portion in a double helix manner, and the auxiliary tooth is connected to one end of the planing edge.

As a further improvement of the present invention, an auxiliary tooth interlaced and surrounding the guiding tooth is further disposed on the locking portion, so that the guiding tooth and the auxiliary tooth are disposed in a double-helix manner.

As a further improvement of the present invention, an auxiliary tooth interlaced and surrounding the guiding tooth is further disposed on the locking portion, so that the guiding tooth and the auxiliary tooth are disposed at the locking portion in a double-helix manner, and two ends of the planing edge are respectively connected to the second thread and the auxiliary tooth.

As a further improvement of the invention, the cutting edge has a vertical surface, an inclined surface extending obliquely outward from the vertical surface, and a cutting edge formed by connecting the vertical surface and the inclined surface, and the orientation of the cutting edge is the same as the screwing-in direction of the screw.

Therefore, in the initial locking stage, the guiding teeth can be used for matching with the locking part to rotationally cut the locking object, meanwhile, the toothless section can be used for accommodating chips generated in the locking process, and special auxiliary matching arrangement of the cutting edge is continuously utilized, so that fibers of the locking object which are not cut off and are partially wound on the guiding teeth in the rotational locking process are pushed and cut again, the blocking screw-in effect formed by the fibers in the subsequent process is damaged and reduced, the friction between the continuous first screw teeth and the locking object during locking is effectively reduced, the fibers of the locking object can be effectively prevented from being wound improperly to reduce the locking speed, and the toothless section is utilized to increase the smoothness of chips and improve the chip containing effect, the locking resistance is greatly reduced, and the locking and stable positioning efficiency is effectively accelerated.

Drawings

FIG. 1 is a schematic view of a prior art screw;

FIG. 2 is a schematic view of a first preferred embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of the first preferred embodiment;

FIG. 4 is a schematic view of the first preferred embodiment in a locked state;

FIG. 5 is a schematic view of a second preferred embodiment of the present invention;

FIG. 6 is a schematic view of a third preferred embodiment of the present invention;

FIG. 7 is a schematic view of a fourth preferred embodiment of the present invention;

FIG. 8 is a schematic view of a fifth preferred embodiment of the present invention;

FIG. 9 is a schematic view of a sixth preferred embodiment of the present invention;

FIG. 10 is a schematic view of a seventh preferred embodiment of the present invention;

FIG. 11 is a schematic view of an eighth preferred embodiment of the present invention.

Description of the symbols:

the prior art is as follows:

1 screw

11 screw head

12 rod body

13 closure part

14 thread

2 Lock compound

The invention comprises the following steps:

3 screw

31 screw head

32 rod body

33 closure part

34 first screw thread

35 guide tooth

36 cutting edge

37 second thread

38 planing edge

39 auxiliary tooth

321 toothless section

361 vertical plane

362 inclined plane

363 cutting edge

4-Lock Compound

a1 external diameter of screw thread

b1 cutting edge height

Detailed Description

The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.

Referring to fig. 2, in a first preferred embodiment of the present invention, the screw 3 includes a screw head 31, a rod 32 extending outward from the screw head 31, a locking portion 33 opposite to the screw head 31 and formed at the other end of the rod 32, a first screw thread 34 spirally surrounding the rod 32 and extending from the screw head 31 to the locking portion 33, and a guiding tooth 35 disposed on the rod 32 and near the locking portion 33 and extending toward the screw head 31, one end of the first screw thread 34 is not connected to the corresponding end of the guiding thread 35, so that a toothless section 321 is formed between the first thread 34 and the guiding thread 35, at least one cutting edge 36 is disposed on the toothless section 321, and two ends of the cutting edge 36 are respectively connected to the first thread 34 and the guiding thread 35, the outward protruding height b1 of the cutting edge 36 is less than the maximum outward diameter a1 of the first thread 34; in addition, the toothless section 321 has an enlarged accommodating space due to the structural design factor that the first thread 34 is not connected to the guiding thread 35.

Referring to fig. 3, the cutting edge 36 has a vertical surface 361, an inclined surface 362 extending obliquely outward from the vertical surface 361, and a cutting edge 363 formed by connecting the inclined surface 362 with the vertical surface 361, and the cutting edge 363 has the same direction as the screwing direction of the screw 3.

Referring to fig. 2 to 4, during the locking, a locking torque is applied to the screw head 31 by a tool (not shown) in advance, so that the locking portion 33 locked on the locking member 4 is pushed into the locking member 4 in a linked manner, and when the guiding tooth 35 near the locking portion 33 is driven to screw in with the locking portion 33, the initial cutting operation is performed on the locking member 4, so that the screw 3 can rapidly enter the locking member 4, therefore, during the screwing in of the guiding tooth 35, the fiber generated during the locking can be cut in a progressive rotation manner under the driving of the rotation torque, thereby effectively winding the fiber at the locking portion 33 at the initial stage of the locking, and the non-tooth section 321 can accommodate the cutting chips generated during the locking process between the locking portion 33 and the guiding tooth 35 and accelerate the outward discharge, when the screw is continuously screwed, the cutting edge 36 is provided at the toothless section 321, the cutting of the guiding tooth 35 can be assisted by the cutting edge 36, so that when the cutting edge 36 is engaged with the guiding tooth 35 for screw-in locking, the cutting edge 36 can play a role of multiple cutting with the guiding tooth 35, that is, the vertical surface 361 is firstly used for pushing the fiber of the locking object 4 which is not cut off and is partially wound on in the screw-locking process, and then the cutting edge 363 is used for cutting, and then the inclined surface 362 is used for discharging the chips outwards along the first screw tooth 34, so that the cutting edge 36 is used for destroying and reducing the blocking screw-in effect which is formed by the fiber in the subsequent process, so that partial fiber is actually cut off, and particularly, a better drilling effect can be achieved for a harder material, thereby saving labor and increasing the locking speed, therefore, the lack of resistance generated by the fiber of the locking member 4 can be effectively avoided, and at the same time, the expansion of the toothless section 321 can be utilized to increase the smoothness of discharging the part of the chips to the outside between the first threads 34 when the locking portion 33 and the guiding threads 35 are locked, and to improve the chip-containing effect of part of the chips, and of course, by designing the outward protruding height b1 of the cutting edge 36 to be smaller than the maximum outward diameter a1 of the first threads 34, the cutting edge 36 can be prevented from excessively cutting the fiber of the locking member 4, so that the subsequent speed of the first threads 34 can be facilitated, that is, the fiber density of the first threads 34 can be timely changed by the pushing action of the cutting edge 36 when the threads are screwed in, further, the tighter engagement effect can be formed with the locking member 4, and also when the tooth surface of the first threads 34 is in the locking member 4, the locking operation is not affected by the tooth breaking, so that the resistance and the torsion of the locking can be effectively reduced, the stabilizing effect is good, the drill lock is not pressed by excessive chips during continuous drilling, the speed of the drill lock is hindered, the locking speed and the fastening force are effectively improved, and the like.

Referring to fig. 5, a second preferred embodiment of the present invention, which still includes the main components described in the previous embodiment, in this embodiment, the screw 3 is fully featured, and is shown in the other direction of the screw 3, and the difference between this embodiment and the previous embodiment is: the toothless section 321 is further provided with at least one planing edge 38, so that the toothless section 321 is provided with at least two corresponding cutting edges 36 and planing edges 38, the direction of the planing edges 38 is the same as the screwing entering direction of the screw 3, two ends of the cutting edges 36 are still respectively connected with one ends of the first screw teeth 34 and the guide teeth 35, and two ends of the planing edges 38 are not connected with the first screw teeth 34 and the guide teeth 35; therefore, by the design of the cutting edge 36 and the planning edge 38 on the toothless section 321, not only the fast locking and positioning effect can be achieved at the initial locking stage, but also the cutting edge 36 and the planning edge 38 can be effectively utilized to assist the screwing-in drilling and locking operation of the guide tooth 35, so that the locking speed can be increased while the labor is saved, the locking resistance of the subsequent screwing-in of the first thread 34 can be greatly reduced, the friction phenomenon between the locking object 4 can be effectively reduced, the force application and time can be effectively reduced, the fastening force between the screw 3 and the locking object 4 can be increased, the locking resistance can be effectively reduced, and the locking efficiency can be accelerated.

Referring to fig. 6, in the third preferred embodiment of the present invention, particularly, a second thread 37 interlaced and surrounding with the first thread 34 is further disposed on the rod 32, but the design of the second thread 37 can also be applied to the second embodiment, that is, as shown in the fourth preferred embodiment of fig. 7, the second thread 37 is connected to one end of the planing edge 38 additionally disposed on the toothless section 321, so that the first and

second threads

34, 37 are disposed on the rod 32 in a double-helix manner: therefore, through the staggered surrounding arrangement formed by the first and

second threads

34, 37, the locking effect of subsequent accelerating drilling cutting and chip removal speed benefits can be greatly improved in the drilling and locking process, the locking resistance can be greatly reduced, the generation of chip accumulation can be effectively avoided, the locking smoothness can be effectively improved, the fastening force between the locked screw 3 and the locking object 4 can be effectively increased, and the stable locking and positioning effect can be effectively achieved.

Referring to fig. 8, the fifth preferred embodiment of the present invention has the same effects as those of the first embodiment in achieving the fastening and locking, and the effects of reducing the locking resistance and the torsion are the same as those of the first embodiment, and particularly, in this embodiment, an auxiliary tooth 39 is further disposed on the locking portion 33 in an alternating and surrounding manner with the guiding tooth 35, so that the guiding tooth 35 and the auxiliary tooth 39 are disposed at the locking portion 33 in a double-spiral manner, and the design of the auxiliary tooth 39 can also be applied to the second preferred embodiment, i.e., the sixth preferred embodiment shown in fig. 9, and the planing edge 38 is connected to the auxiliary tooth 39 at one end, or applied to the third preferred embodiment, i.e., the seventh preferred embodiment shown in fig. 10, the first and

second threads

34 and 37 are disposed on the rod 32, and the guiding tooth 35 and the auxiliary tooth 39 are disposed on the locking portion 33 in an alternating and spiral manner, alternatively, or in addition, as shown in the eighth preferred embodiment of fig. 11, the two ends of the planing edge 38 are respectively connected to the two screw teeth 37 and the auxiliary teeth 39.

Therefore, the staggered arrangement pattern formed by the guide teeth 35 and the auxiliary teeth 39 is used to assist the screwing-in drilling of the locking portion 33, so as to increase the speed of screwing into the locking object 4, and simultaneously reduce the resistance of initial screwing-in during locking, and the design that the toothless section 321 has the cutting edge 36, or simultaneously has the cutting edge 36 and the planing edge 38 is used to accelerate the fiber cutting effect of the locking object 4, so that the chip accumulation is avoided, which is beneficial to greatly reducing the friction resistance and torsion generated by the screw 3 during the drilling and locking process, effectively improving the drilling and chip discharge speed benefits, greatly improving the smoothness of locking, and further beneficial to increasing the fastening force between the locked screw 3 and the locking object 4, and effectively achieving the stable locking and positioning effect.

In conclusion, the screw of the invention utilizes the design that the locking part is provided with the guide teeth, and the toothless section between the first screw teeth and the guide teeth is at least provided with a cutting edge, so that the guide teeth are firstly utilized to assist the locking part to enter in the locking process, then the toothless section is utilized to accommodate the cutting chips generated in the locking process, and simultaneously the cutting edge is matched with the multiple cutting effects of the guide teeth, namely, the fibers of the locking compound which are not cut off and are partially wound on the screw are pushed and then cut in the screwing process, thereby damaging and reducing the blocking screw-in function formed by the fibers in the follow-up process, reducing the mutual friction between the first screw teeth and the locking compound when the first screw teeth are continuously screwed, enabling the first screw teeth to further form a tighter meshing effect with the locking compound, effectively reducing the resistance and the torsion of the locking, and having good stabilizing effect, when the drill locking is continued, too much cuttings cannot be pressed to block the speed of the drill locking, the locking resistance is effectively reduced, the locking efficiency and the fastening force are accelerated, and the purpose of the invention can be really achieved.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and should not be taken as limiting the scope of the invention, i.e., the invention is intended to cover all the modifications and equivalents of the claims and their equivalents.

Claims

1. A screw comprises a screw head, a rod body extending outwards from the screw head, a locking part opposite to the screw head and formed at the other end of the rod body, and a first screw tooth spirally and annularly arranged on the rod body; wherein, the first screw tooth extends from the screw head to the locking part; the method is characterized in that:

the rod body is further provided with a guide tooth extending from the locking part to the screw head, one end of the guide tooth is not connected with the corresponding end of the first screw tooth, so that a tooth-free section is formed between the first screw tooth and the guide tooth, the toothless section is designed to be enlarged to increase the smoothness of chip discharge and chip capacity, and at least a cutting edge is provided on the toothless section, the cutting edge is provided with a vertical surface, an inclined surface which extends outwards from the vertical surface in an inclined way, and a cutting edge which is formed by connecting the vertical surface and the inclined surface, and the orientation of the cutting edge is the same as the entering direction of the screw lock, and two ends of the cutting edge are respectively connected with the first screw teeth and the guide teeth, so that the cutting edge is connected with the end points of the guide teeth and the first screw teeth, and the outward protruding height of the cutting edge is smaller than the maximum outward protruding outer diameter of the first screw teeth.

2. The screw of claim 1, wherein the non-threaded section is provided with at least one cutting edge oriented in the same direction as the screw is screwed into the screw.

3. The screw of claim 1, wherein the shaft further comprises a second thread interlaced with the first thread, such that the first and second threads are disposed on the shaft in a double helix.

4. The screw of claim 2, wherein the shank has a second thread formed thereon and disposed in a staggered relationship with the first thread such that the first and second threads are disposed on the shank in a double helix configuration and the second thread is engaged with an end of the cutting blade.

5. The screw of claim 1, wherein the locking portion further has an auxiliary tooth disposed thereon and surrounding the guide tooth in a staggered manner, such that the guide tooth and the auxiliary tooth are disposed at the locking portion in a double-helix manner.

6. The screw of claim 2, wherein the locking portion further has an auxiliary tooth disposed thereon and surrounding the guide tooth in a staggered manner, such that the guide tooth and the auxiliary tooth are disposed at the locking portion in a double spiral manner, and the auxiliary tooth is connected to one end of the planing edge.

7. The screw of claim 3, wherein the locking portion further has an auxiliary tooth surrounding the guide tooth in a staggered manner, so that the guide tooth and the auxiliary tooth are arranged in a double-helix manner.

8. The screw of claim 4, wherein the locking portion further has an auxiliary tooth surrounding the guide tooth in a staggered manner, so that the guide tooth and the auxiliary tooth are disposed at the locking portion in a double-helix manner, and two ends of the planing edge are respectively connected to the second thread and the auxiliary tooth.