CN201284777Y

CN201284777Y - Screw with conical teeth section

Info

Publication number: CN201284777Y
Application number: CNU2008202100199U
Authority: CN
Inventors: 周冠英; 陈骏彦
Original assignee: SHIFENG BOLT FACTORY CO Ltd
Current assignee: SHIFENG BOLT FACTORY CO Ltd; Sheh Fung Screws Co Ltd
Priority date: 2008-10-23
Filing date: 2008-10-23
Publication date: 2009-08-05
Anticipated expiration: 2018-10-23

Abstract

The utility model relates to a conical teeth screw, comprising a screw head and a screw rod. The screw head includes a top surface and a bottom surface opposite to the top surface. The screw rod includes a placement section, a conical teeth section, a threaded section and a screw entry part; wherein, the placement section is adjacent to the bottom surface of the screw head, the conical teeth section is connected with the placement section, the threaded section is provided with a plurality of spiral teeth and the screw entry part is at the end of the threaded section. The conical teeth section has two continuous spiral teeth at least. Diameters of the screw teeth are different, which are reduced from the placement section to the threaded section. The diameter of the screw tooth close to the placement section is larger than that the diameter of the placement section. Through varying teeth diameters from large to small, the conical teeth section can locate a gasket at the placement section of the screw and keep the gasket from dropping and the reverse rotation of the screw can be effectively prevented after screw connection.

Description

Screw with awl tooth section

[technical field]

The utility model relates to a kind of screw, particularly relates to a kind of screw with awl tooth section.

[background technique]

Consult Fig. 1, be existing screw 1 user mode, this screw 1 comprises a spiral shell head 11, and a screw rod 12 that is connected on this spiral shell head 11, this screw rod 12 comprises that one is provided with the thread section 14 of several spiral teeth 13, and a portion that is screwed into 15 that is positioned at these thread section 14 ends.

For reaching waterproof action, this screw 1 generally all overlaps is furnished with a pad 16, when carrying out sealed operation, be to utilize this screw 1 to screw togather a metal covering 17 on a crossbeam 18, this moment, this spiral shell head 11 can push this pad 16, make 16 distortion of this pad and clog space between this spiral shell head 11 and this metal covering 17, to reach good waterproof effect.

Yet this screw 1 but produces following problems on reality is used:

1. it is loaded down with trivial details and inconvenient to apply:

The builder is positioned over a large amount of screws that is arranged with this pad 16 1 in the tool bag usually; when construction screws togather operation; be by in the tool bag single screw 1 being taken out use with one hand; yet be convenient to be inserted in this screw rod 12 for making this pad 16; the internal diameter of this pad 16 can be a bit larger tham the diameter of this screw rod 12 usually; cause this pad 16 that is sheathed on this screw 1 that the phenomenon that comes off is often arranged; when the builder takes out this screw 1; this pad 16 may be come off by this screw 1; become scattered about in the tool bag; make the builder need spend that mental and physical efforts are looked for and again this pad 16 is inserted in this screw rod 12 in tool bag; or change another screw that is arranged with pad 16 1 again, apply complicated and inconvenience and cause.

2. waterproofing effect is poor:

Consult Fig. 2, this screw 1 is in order to screw togather this metal covering 17 on this crossbeam 18, yet, when these metal covering 17 long term exposure in the external world, most probably can be because of the nondirectional vibrations of the influence of external environment, so, to there be high probability can cause this screw 1 counterrotating and become flexible, and then lose the extruding this pad 16 strength, cause this pad 16 can't seal space between this spiral shell head 11 and this metal covering 17 again, thereby run into again when raining weather, rainwater easily loses good waterproof effect by the gap infiltration.

[model utility content]

The purpose of this utility model is to be to provide a kind of screw with awl tooth section, and locating washer and operation are convenient effectively, and are not easy counterrotating after screwing togather.

So, the utlity model has the screw of boring the tooth section, comprise: a spiral shell head and a screw rod, this spiral shell head comprises an end face, and a bottom surface in contrast to this end face; This screw rod comprises that awl tooth section, that a storing section, that is in close proximity to this spiral shell head bottom surface is connected in this storing section is provided with the thread section of several spiral teeth, and one be located at this thread section terminal and with this storings section homonymy and the portion that is screwed into of setting at interval.

This awl tooth section has the thread that at least two road continuous helical shapes are provided with, and the tooth footpath of described thread is not waited, and is by the direction convergent of this storing section toward this thread section, and the thread tooth of the most contiguous this storing section directly is the diameter greater than this storing section.

The beneficial effects of the utility model are: by described thread tooth footpath awl tooth section from large to small, make a pad can be positioned the storing section of this screw and do not come off, and then to cooperate the thread of the most contiguous this storing section of this awl tooth section again be the design of snaggletooth, make sheathed this pad, can stop on this screw and move, thereby prevent that this screw from unscrewing.

[description of drawings]

Fig. 1 is a cross-sectional schematic, and the use locked state of existing screw and pad is described;

Fig. 2 is a sectional view, illustrates that existing screw and pad form the aspect that gets loose;

Fig. 3 is a stereogram, and the stereochemical structure of first preferred embodiment of the utility model screw is described;

Fig. 4 is a front elevation, and the aspect of the awl tooth section of this first preferred embodiment is described;

Fig. 5 is a sectional view, and the use locked state of this first preferred embodiment is described; And

Fig. 6 is a stereogram, and the stereochemical structure of second preferred embodiment of the utility model screw is described.

[embodiment]

Below in conjunction with drawings and Examples the utility model is elaborated.Before the utility model is described in detail, be noted that in the following description similar elements is to represent with identical numbering.

Consult Fig. 3, the utlity model has first preferred embodiment of the screw 2 of awl tooth section, this screw 2 has a spiral shell head 3 and a screw rod 4, this spiral shell head 3 has an end face 31 and a bottom surface 32 in contrast to this end face 31, as for, this screw rod 4 is to have the thread section 44 that awl tooth section 42, that the storing section 41, of bottom surface 32 that a next-door neighbour is located at this spiral shell head 3 is connected in this storings section 41 is provided with several spiral teeth 43, and one be located at this thread section 44 terminal and with the portion that is screwed into 45 of these storings section 41 homonymies and interval setting.In the present embodiment, this screw rod 4 also comprises the section of wearing 5 that a no spiral tooth 43 is provided with, and the two ends of this section of wearing 5 are to be connected to this thread section 44 and this awl tooth section 42, and this to be screwed into portion 45 be a drill bit.

Moreover, put the direction of section 41 by this toward this thread section 44, first thread 421, second thread 422, the 3rd thread 423 that this awl tooth section 42 has the continuous helical shape to be provided with in regular turn, and the 4th thread 424, and its tooth footpath of successively decreasing in regular turn, and the tooth of first thread 421 of the most contiguous this storings section 41 directly is the diameter greater than this storing sections 41, and these first thread, 421 ends are and are blocked shape, make it have a thickness that protrudes from these screw rod 4 surfaces, industry claims that this kind situation is the snaggletooth state usually.

Consult Fig. 3 and consult Fig. 4 in the lump, for reaching waterproof effect, this screw 2 generally all overlaps is furnished with a pad 6, this pad 6 is to be made and had one by a plasticity material to bore a hole 61, this perforation 61 is to be depicted as a up big and down small cone shape hole as direction among Fig. 4, the minimum diameter of this perforation 61 is the diameters greater than this screw rod 4, but bores the tooth footpath of first thread 421 of tooth section 42 less than this; During assembling, be this pad 6 to be screwed into portion 45 by this be inserted in and be positioned on the storing section 41 of this screw rod 4 toward the direction of this awl tooth section 42, because the minimum diameter of the perforation 61 of this pad 6 is less than this first thread 421, therefore must make this pad 6 arrive the storing section 41 of this screw rod 4 by this first thread 421 in the mode that screws in, again because the minimum diameter of the perforation 61 of this pad 6 is the tooth footpaths less than this first thread 421, therefore this pad 6 can be positioned between the bottom surface 32 and this first thread 421 of this spiral shell head 3 after arriving this storing section 41, and can not come off by this screw 2.

Consult Fig. 4,5 more in the lump, when carrying out sealed operation, this screw 2 screws togather a metal covering 100 on a crossbeam 101 time, the spiral shell head 3 of this screw 2 can push this pad 6, make 6 distortion of this pad and clog space (as shown in Figure 5) between this spiral shell head 3 and this metal covering 100, reach good waterproof effect.

When this screw 2 has the loosening trend of counterrotating, because this pad 6 is to be positioned between the bottom surface 32 and this first thread 421 of this spiral shell head 3, and the minimum-value aperture of the perforation 61 of this pad 6 is the diameters less than this first thread 421, when therefore needing counterrotating as if this screw 2, must make this first thread 421 terminal these pads 6 that screw in earlier, just have way to make these screw 2 backspins; But, because these first thread, 421 ends are one by succise snaggletooth aspect, make it be formed with a thickness that protrudes from these screw rod 4 surfaces, so this first thread 421 can not screw in this pad 6 easily, make this screw 2 be not easy to produce counterrotating and loosening phenomenon.

Consult Fig. 6, the utlity model has second preferred embodiment of the screw 2 of awl tooth section, roughly similar aforementioned first preferred embodiment, different places are, the two ends of this thread section 44 are to be connected to this awl tooth section 42 to be screwed into portion 45 with this, and lack the disclosed section of wearing 5 of Fig. 3 first preferred embodiment, so as to the aspect of another selection of user is provided, but this second preferred embodiment still is same as aforementioned this first preferred embodiment, have and to locate this pad 6 and operation facility, and be not easy the function of counterrotating after screwing togather.

As shown in the above description, the screw 2 that the utlity model has awl tooth section is characterised in that the structure of this awl tooth section 42 can be positioned this pad 6 on this screw 2 with awl tooth section, and these first thread, 421 ends are and are blocked shape, can effectively prevent the screw 2 after sealed to produce counterrotating and loosening situation, so can reach effect of the present utility model really because of vibrations.

Claims

1. one kind has the screw of boring the tooth section, comprise: a spiral shell head, and screw rod, this spiral shell head comprises an end face, and bottom surface in contrast to this end face, this screw rod comprises that one is in close proximity to the storing section of this spiral shell head bottom surface, a thread section that is provided with several spiral teeth, and one be located at this thread section terminal and with this storings section homonymy and with the portion that is screwed into of this storing spacer segment setting; It is characterized in that: this screw rod also comprises an awl tooth section that is connected in this storing section, this awl tooth section has the thread that at least two road continuous helical shapes are provided with, the tooth of described thread directly varies in size, and be by the direction convergent of this storing section, and the diameter of section is put greater than this in the most contiguous thread tooth footpath that this puts section toward this thread section.

2. the screw with awl tooth section as claimed in claim 1 is characterized in that: the thread end of the most contiguous this storing of this awl tooth section section is and is blocked shape, makes it have a thickness that protrudes from this screw surface.

3. the screw with awl tooth section as claimed in claim 2, it is characterized in that: this portion of being screwed into is a drill bit.

4. the screw with awl tooth section as claimed in claim 3, it is characterized in that: this screw rod also comprises the section of wearing of a no spiral tooth setting, and the two ends of this section of wearing are connected to this thread section and this awl tooth section.

5. the screw with awl tooth section as claimed in claim 3, it is characterized in that: the two ends of this thread section are connected to this awl tooth section and this is screwed into portion.

6. as claim 4 or 5 described screws with awl tooth section, it is characterized in that: this awl tooth section has contiguous this a storing section and terminal being by succise first thread, second thread that is connected with this first thread, the 3rd thread that is connected with this second thread in regular turn, and one be connected with the 3rd thread and away from the 4th thread of this storing section, wherein, the diameter of section is put greater than this in the tooth footpath of this first thread, and the tooth of this first, second, third and the 4th thread directly is to successively decrease in regular turn.

7. the screw with awl tooth section as claimed in claim 6, it is characterized in that: this screw also comprises a pad that is sheathed on the storing section of this screw rod, and this pad has a perforation, and the diameter that should bore a hole is less than the first thread tooth footpath of this awl tooth section.

8. the screw with awl tooth section as claimed in claim 6, it is characterized in that: this screw also comprises a pad that is sheathed on the storing section of this screw rod, this pad has a cone-type piercer, and the minimum diameter that should bore a hole is less than the first thread tooth footpath of this awl tooth section.