CN2731164Y

CN2731164Y - Screw

Info

Publication number: CN2731164Y
Application number: CN 200420071169
Authority: CN
Inventors: 吴丽卿
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-02
Filing date: 2004-07-02
Publication date: 2005-10-05
Anticipated expiration: 2014-07-02

Abstract

The utility model relates to a screw, comprising a screw head and a screw stem body; wherein, the screw stem body is provided with a fastening portion and an adjacent locking portion, and a ring conical surface formed between the fastening portion and the locking portion. The ring conical surface respectively forms an upper and a lower neck lines at the connecting position with the fastening portion and the locking portion, the upper ring of the locking portion is provided with spiral-shaped screw teeth, and the fastening portion is provided with a plurality of slot channels in an interval and winding way, meanwhile, a convex tooth is formed between any two slot channels; especially, each convex tooth extends from the upper neck line to the lower neck line to cause the ring conical surface to protrude upwards with convex teeth, so when the screw is locked, the resistance is reduced to achieve the effect of being easily screwed in without too much labour, and an inverted slot can be arranged in due time to increase the fastening force of the screw to avoid the loosening and exiting and to be favorable for the screw head to lock and position the objects.

Description

Screw

Technical field

The utility model relates to a kind of screw design.

Background technique

Consult Fig. 1, Fig. 2, the one side of the object 2 that known screw 1 complete limited desire is sealed is by block, can't help factors such as retaining screw 1 when perhaps sealed, easily produce the loosening and influence that can't lock of screw 1 when causing nut 3 sealed, therefore this screw 1 removes and includes a spiral shell head 11, and one outside the members of being located on the spiral shell head 11 such as the body of rod 12, the locking part 122 that has a clip engine part 121 and opposite clip engine part 121 especially at this body of rod 12, and the annular conical surface 124 that is formed at 122 of this clip engine part 121 and locking parts, and aforementioned this annular conical surface 124 respectively with this clip engine part 121, locking part 122 joining places are formed with on one, inferior nuchal line 125,126; In addition, be equipped with spiral helicine thread 123 on this locking part 122; Again, spaced apartly on this clip engine part 121 be provided with most grooves 127, these 127 of wantonly two grooves are formed with a double wedge 128 simultaneously, so that be surrounded with continuous double wedge 128 on this clip engine part 121, and this each double wedge 128 only extends to upper hind neck line 125 positions, that is there is no the design of any double wedge 128 on this annular conical surface 124.

Consult Fig. 2, the use of this screw 1, offer a perforation 21 on earlier that desire is the sealed object 2, and this perforation 21 is slightly less than footpath outside this clip engine part 121, then screw 1 is inserted in this perforation 21 again, bestows one simultaneously and knocks this spiral shell head 11 of strength pushing tow, so that this body of rod 12 is inserted in this perforation 21 gradually, and this double wedge 128 of mat and reach this screw 1 firm stopper in the effect of perforation in 21, is able to firmly with object 2 sealed location when sealed in order to this nut 3.

Only, though the double wedge 128 of this screw 1 has the clip locating effect, right actual space of using the back to find to still have improvement, details are as follows now:

1, insert effort:

Owing to be surrounded with continuous double wedge 128 on this clip engine part 121, and this each double wedge 128 only extends to upper hind neck line 125 positions, so when sealed, this annular conical surface 124 can be anchor ring with the wall 22 of perforation 21 in advance contact at the beginning of inserting process, therefore desire is inserted this screw 1, must bestow big strength for it, can allow this screw 1 knock and insert.

Moreover, this screw 1 is in inserting process, also can utilize dissecing of this double wedge 128 to enter, but, just insert the initial stage because of this screw 1, being subjected to this annular conical surface 124 and the wall 22 of perforation 21 is to be the anchor ring contact condition to influence, relatively, must bestow the bigger active force that knocks and can reach this screw 1 and insert effect, when arriving double wedge 128 positions so that this screw 1 is inserted gradually, the impulse force of the moment impact that this double wedge 128 is born, will cause this double wedge 128 to bear and cause collapsing the generation of tooth phenomenon of rupture, influence this double wedge 128 follow-up active forces of inserting, cause in the use and require great effort more, remain in fact to be improved.

2, the stopper effect reduces:

Still continuous aforementioned, because it is excessive to insert resistance, cause this double wedge 128 easily to produce and collapse the tooth phenomenon of rupture, so that the stopper power of this

double wedge

128 and 22 of 21 walls of perforation reduces, cause the stopper effect of this screw 1 to reduce, make this screw 1 be easy to generate loosening, withdraw from object 2, and then influence the effect of nut 3 with object 2 sealed location.

3, influence the effect that is bonded with each other of object:

Still continuous aforementioned, because being subjected to this annular conical surface 124 and the wall 22 of perforation 21 is to be the anchor ring contact condition to influence, so must bestow the bigger active force that knocks, can reach this screw 1 and insert effect, but because of like this, make perforation 21 circumferential surface of this object 2 be subjected to down and outwards protuberance of extruding that screw 1 inserts on the contrary, so that object 2 surfaces are the out-of-flatness state, cause this object 2 can't connect airtight and be deflected condition each other, so that this object 2 is if be applied to have when rotating purpose, then this joint will certainly influence the Security of use, has to consider.

The model utility content

Therefore, the purpose of this utility model is that a kind of screw is being provided, and it has easily, the laborsaving stopper power of inserting and promoting screw, influences effects such as fixed by nut is sealed to prevent loosening the withdrawing from of screw.

The utility model screw, it includes a spiral shell head, and a body of rod of being located on the spiral shell head; Wherein, this body of rod has the locking part of a clip engine part and opposite clip engine part, and between this clip engine part and locking part and be formed with an annular conical surface, and this annular conical surface is formed with a upper and lower neck line respectively with this clip engine part, locking part joining place respectively, be equipped with spiral helicine thread on this this locking part in addition, be arranged with most grooves as for interval on this fastening part, and be formed with a double wedge between these wantonly two grooves, this double wedge extends to the upper hind neck line position simultaneously; Wherein: this each double wedge continues to extend to the inferior nuchal line position by the upper hind neck line, makes and convexes with double wedge on the annular conical surface.

Offer down groove on this double wedge.

After adopting such scheme, when this screw lock is established, utilizing this double wedge is a contact with contacting of wall of perforation, therefore can impel this screw to insert easily in this perforation with minimum drag, with guarantee to use laborsaving outside, and the offering of groove of should falling can increase the stopper of screw power, so that this screw is difficult for becoming flexible, withdrawing from, when sealed, be able to firmly with the sealed location of object in order to nut.

Description of drawings

Fig. 1 is a schematic perspective view of known screw;

Fig. 2 is a locked state schematic representation of known screw;

Fig. 3 is the schematic perspective view of first preferred embodiment of the utility model screw;

Fig. 4 is a user mode schematic representation of this preferred embodiment;

Fig. 5 is that a user mode end face of this preferred embodiment is analysed and observe enlarged diagram, illustrates that this double wedge and perforation wall are a contact condition;

Fig. 6 is a locked state schematic representation of this preferred embodiment;

Fig. 7 is a schematic perspective view of this second preferred embodiment;

Fig. 8 is a schematic perspective view of the 3rd preferred embodiment;

Fig. 9 is a locked state schematic representation of the 3rd preferred embodiment.

4 screws, 41 spiral shell heads

42 bodies of rod, 421 clip engine parts

422 locking parts, 423 threads

424 annular conical surfaces, 425 upper hind neck lines

426 inferior nuchal lines, 427 grooves

428 double wedges 429 are groove

5 sealed object 6 nuts

Embodiment

About aforementioned and other technology contents, characteristics and effect of the present utility model, in the following detailed description that cooperates with reference to graphic preferred embodiment, can clearly understand.

Before the utility model is described in detail, be noted that in the following description similarly assembly is to represent with identical numbering.

Consult Fig. 3, first preferred embodiment of the utility model screw 4, it includes a spiral shell head 41 and and is located at the body of rod 42 on the spiral shell head 41; Wherein, this body of rod 42 has the locking part 422 of a clip engine part 421 and opposite clip engine part 421, and the annular conical surface 424 that is formed at 422 of this clip engine part 421 and locking parts, and this annular conical surface 424 respectively with this clip engine part 421, locking part 422 joining places are formed with on one respectively, inferior nuchal line 425,426, be equipped with spiral helicine thread 423 on this locking part 422 in addition, as for being arranged with most grooves 427 on this fastening part 421 at interval, and these 427 of wantonly two grooves are formed with a double wedge 428, particularly, this each double wedge 428 continues to extend to inferior nuchal line 426 positions by upper hind neck line 425, makes and convexes with double wedge 428 on the annular conical surface 424.

Consult Fig. 4, Fig. 6, during the actual use of present embodiment, offer a perforation 51 on earlier that desire is the sealed object 5, and this perforation 51 is slightly less than footpath outside this clip engine part 421, then screw 4 is inserted in this perforation 51 again, bestow one simultaneously and knock this spiral shell head 41 of strength pushing tow, and this double wedge 428 of mat extends to inferior nuchal line 426 positions by upper hind neck line 425, make and convex with double wedge 428 on the annular conical surface 424, so this screw 4 knocks when inserting operation at the beginning, then these double wedge 428 proper walls 52 with perforation 51 that are convexly set on the annular conical surface 424 are to be a contact condition (as shown in Figure 5), when therefore knocking the application of force, to effectively reduce and insert resistance, simultaneously cooperate this double wedge 428 promptly to have at the beginning to dissect again and enter effect, this screw 4 will be inserted in the perforation 51 more easily, and be embedded in the perforation 51 by being surrounded with continuous double wedge 428 on the clip engine part 421, with strong fix screw 4 on object 5, when guaranteeing that follow-up nut 6 is sealed, avoid this screw 4 loosening, withdraw from object 5 and influence nut 6 fixing sealed effects.

Consult Fig. 7, be second preferred embodiment of the utility model screw 4, still include members such as a spiral shell head 41 and a body of rod 42, and the structure of this each member and the effect reached thereof are all identical with first preferred embodiment, do not describe in detail for this reason; Particularly, this screw 4 of present embodiment is that the double wedge 428 that is convexly equipped with on this annular conical surface 424 also can form aspect as shown in FIG..

Consult Fig. 8, be the 3rd preferred embodiment of the utility model screw 4, still include members such as a spiral shell head 41 and a body of rod 42, and the structure of this each member is all identical with previous embodiment, does not describe in detail for this reason; Only, the difference of this screw 4 of present embodiment be in: offer most on this double wedge 428 and fall grooves 429, present embodiment is graphic simultaneously, constructs expression with first embodiment.

Consult Fig. 9, during the actual use of present embodiment, this screw 4 is inserted object 5 modes and all is same as first embodiment, however, and because of offering most groove 429 designs on this double wedge 428 of present embodiment, therefore, in case after this screw 4 is inserted, the stopper effect that the groove 429 that then should fall can be promoted this double wedge 428 and perforation 51 walls 52 will help these screw 4 strong fixs on object 5, become flexible, withdraw from object 5 so that screw 4 is more difficult, guarantee that the location of screw 4 is installed with effect.

By above-mentioned explanation, and the utility model and known work one are compared, when learning that the utility model has following listed advantage and effect really:

1, insert laborsaving:

Owing to be surrounded with continuous double wedge on this clip engine part, and this each double wedge extends to the inferior nuchal line position by the upper hind neck line, make on this annular conical surface and convex with double wedge, so when sealed, the wall of this annular conical surface and perforation is a contact condition, therefore will effectively reduce the resistance that the process of inserting produces, and cooperate this double wedge promptly to have at the beginning to dissect again simultaneously and enter effect, and promptly have the screw of making and insert effect easily so needn't bestow excessive strength.

Moreover the beginning that this screw is inserted is promptly born and is dissectd the active force that knocks that enters, so the impulse force of the moment impact that this double wedge bore reduced in the safe handling scope, avoids this double wedge to produce and collapses the tooth phenomenon of rupture.

2, promote the stopper effect:

Continuous before still continuous, owing to resistance is minimized, thus can not cause this double wedge to collapse the tooth phenomenon of rupture in the using process, so that stopper power also can not reduce between this double wedge and the perforation wall.

Moreover, offer most grooves on this double wedge, will help to promote the stopper power of screw, make the more difficult generation of this screw become flexible, withdraw from object, guarantee that the location of screw is installed with effect, in order to do the effect of sharp nut with the sealed location of object.

3, influence the effect that is bonded with each other of object:

Still continuous aforementioned, because being subjected to the wall system of this annular conical surface and perforation to be a contact condition influences, to effectively reduce and insert resistance, so that this screw can be inserted in this perforation easily, therefore make the perforation circumferential surface of this object can not be subjected to down and outwards protuberance of extruding that screw inserts, guarantee the flat attitude of object surface, in order to being applied to have the object that rotates purpose when engaging, that is guaranteed object connects airtight effect mutually, the Security of using with dimension.

Conclude aforementioned, the utility model continues to extend to the inferior nuchal line position by this double wedge by the upper hind neck line, make and convex with double wedge on the annular conical surface, make the wall system of this double wedge and perforation be a contact condition, be minimized and insert resistance, so that this screw is able to easily, the laborsaving effects such as object of inserting, and offering of groove arranged down in addition, promote the stopper power of this screw more, become flexible, withdraw from object so that this screw is more difficult, the location of guaranteeing screw is installed with effect, in order to do the effect of sharp nut with the sealed location of object.

The above person of thought, only be explanation preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, promptly the simple equivalent of doing according to the utility model claim and novel description generally changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1, a kind of screw, it includes a spiral shell head, and a body of rod of being located on the spiral shell head; Wherein, this body of rod has the locking part of a clip engine part and opposite clip engine part, and between this clip engine part and locking part and be formed with an annular conical surface, and this annular conical surface is formed with a upper and lower neck line respectively with this clip engine part, locking part joining place respectively, be equipped with spiral helicine thread on this this locking part in addition, be arranged with most grooves as for interval on this fastening part, and be formed with a double wedge between these wantonly two grooves, this double wedge extends to the upper hind neck line position simultaneously; It is characterized in that: this each double wedge continues to extend to the inferior nuchal line position by the upper hind neck line, makes and convexes with double wedge on the annular conical surface.

2, screw according to claim 1 is characterized in that: offer down groove on this double wedge.