CN2781060Y

CN2781060Y - Anti-loosening screw structure

Info

Publication number: CN2781060Y
Application number: CN 200420102693
Authority: CN
Inventors: 李明烈
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-10
Filing date: 2004-12-10
Publication date: 2006-05-17
Anticipated expiration: 2014-12-10

Abstract

The utility model relates to an anti-loosening screw structure, which is mainly characterized in that one or more expanding sections are molded at one end of a screw thread part molded at a screw rod; the expanding section is provided with two opposite thread faces molded in an outward angle expanding mode at the tail end of a screw thread part, and a tail end thread cross section perpendicular to the rod body in a radial direction mode; therefore, a thread cross section with the reverse shielding function can be formed and is larger than the cross section of the screw thread part. As a result, when the utility model completes spiral locking action on a corresponding locking object, holding force and shielding action which are contrary to the rotary direction of the screw threads are generated between the thread cross section of the expanding screw threads and a screw thread groove of the locking object. Therefore, the locking is tighter and firmer and the loosening of the locked screws can be prevented.

Description

Anti-loose screw structural

Technical field

The utility model is about a kind of anti-loose screw structural, refer in particular to a kind of spiro tooth part one end of making screw at stupalith, form at least one and have extending section with the retaining system function of thread rotation direction contrary, thereby prevent that the screw of locking dress from getting loose, and one-body moldedly be easy to low-cost the manufacturing, have more the high hardness of stupalith, heat-resisting and insulation characterisitic.

Background technique

The screw of known each suitable kind utilizes metal material to make mostly, and its structure is a force side, extends into taper or shaft-like shaft by the force side, and forms at the spiro tooth part of shaft surface spiral forming.And known anti-loose screw, then be under the fondational structure of above-mentioned known screw, produce the limit phenomenon that gets loose for obtaining anti-non-return rotation, has the design that promotes the effect of being locked and further between the force side of screw or spiro tooth part, be provided with, for example relative thread one end face is provided with a plurality of angles tooth in the force side of screw, the typical case is as Taiwan utility model patent the 498948th, case before No. 458223, or as Taiwan utility model patent the 475670th, case institute disclosure before No. 368061, mainly be most different sizes of moulding or outstanding teeth design on each tooth cutting edge of a knife or a sword of spiro tooth part, or adopt between the spiro tooth part and adjacent two threads of spiral shell body, vertically offer prominent rib or groove, the typical case is as Taiwan utility model patent the 577497th, 572135,566494,566493,560584,444831, case before 433414 grades, yet, case before the patent of the specific design structure that these are different, its anti-loose structure designs mostly in the spiro tooth part position of locking end near screw, the shaft diameter at this position is generally less, and these screws mostly are the metal material making, unsatisfactory in the hardness property performance, cause the nonslip properties effect that is produced also unsatisfactory.Further be between thread, to offer prominent rib or groove, wherein should will when the lock dress, produce the bigger resistance of locking by prominent rib, and can't obtain to fit tightly between the screw thread alveolus of the spiro tooth part of lock dress back screw and sealed object; And thread is that punching press or cutting form with the groove of tooth paddy therebetween, makes the shaft reduced, the two will directly influence when the lock dress because of application of force effect cause broken screw may, not only influence lock dress more can't be locked dress again by original position.In addition, known screw and anti-loose screw structural thereof with the metal material made, be subject to the material characteristic, and processing technique applicatory, as the processing mode restriction of forging, punching press, cutting, and the making that can't directly produce expansion tooth section at spiro tooth part, and must be after producing general screw structural, cooperate with punching press, cutting mode again and carry out the secondary operations making, thereby need carry out repeatedly procedure, relative fabricating cost can't be again for reducing.

The model utility content

The technical problems to be solved in the utility model is to solve above-mentioned disappearance, avoid disappearance to exist, the utility model redesigns screw structural, allow the direct integrally formed extending section of spiro tooth part one end of screw, produce a contrary between formation and sealed object in the retaining system function of thread rotation direction, preventing that the screw of locking dress from getting loose, and one-body molded and be easy to low-cost the manufacturing with stupalith, have more the high hardness of stupalith, heat-resisting and insulation characterisitic.

The technological scheme that its technical problem that solves the utility model adopts is: anti-loose screw structural of the present utility model, include: a screw body, the shaft that this body contains a force side, extends at aforementioned force side one end, and at the spiro tooth part of aforementioned shaft surface forming; It is characterized in that: this aforementioned spiro tooth part one end, an one-body molded extending section, this extending section contains the expansion thread that or above joint string are formed, utilization expansion thread provides the vertical snaggletooth cross section greater than spiro tooth part, the thread groove of sealed relatively object produces with the making that holds and keep off of thread rotation direction contrary and exerts oneself, make sealed more closely, firmly, get loose to prevent sealed screw.

The extending section that is positioned at spiro tooth part one end of anti-loose screw structural of the present utility model, comply with screw togather rotation direction and relative closely with the thread groove of sealed object easily, firmly screw togather, compared to the design of the prominent rib between known spiro tooth part cause back segment thread and sealed object can't be closely, firmly screw togather, have the preferable effect that relatively closely, firmly screws togather; And by the expansion thread of this extending section, and produce between the thread groove of sealed object with the retaining of the contrary rotation direction of thread and make usefulness, get loose with the screw after preventing to screw togather.

Description of drawings

Fig. 1 is the three-dimensional structure diagram of the utility model first specific embodiment.

Fig. 2 is the part of the utility model first specific embodiment schematic representation of deciding what is right and what is wrong.

Fig. 3 is the three-dimensional structure diagram of another specific embodiment of the utility model.

Fig. 4 is the part of another specific embodiment of the utility model schematic representation of deciding what is right and what is wrong.

Fig. 5 is the sealed relatively object lock of the utility model first a specific embodiment group schematic representation.

[primary clustering symbol description]

1-screw body 2-extending section

The sealed object 11-of 3-force side

12-shaft 13-spiro tooth part

21-expands

thread

22,22 ', 23,23 '-expansion facing

24-tooth cross section 130,131-thread face

Embodiment

Relevant technology contents of the present utility model and detailed description now cooperate graphic being described as follows:

See also Fig. 1 to Fig. 2, the anti-loose screw structural of the utility model first specific embodiment, this anti-loose screw structural includes: a screw body 1 mainly is to adopt the stupalith one molded, thereby has high hardness, heat-resisting and insulation characterisitic.Aforementioned this screw body 1, its structure mainly are to have a force side 11, and the parts such as shaft 12 that are undertaken on force side 11 1 ends, and the peripheral surface of this shaft 12 is provided with spiro tooth part 13.

The utility model provides the structure characteristic of anti-loose function, mainly be to have an extending section 2 at aforementioned spiro tooth part 13 1 ends and the position that is adjacent to force side 11, this extending section 2 has long-pending greater than the tooth line longitudinal plane of aforementioned spiro tooth part 13, formation is made usefulness for thread groove (as shown in Figure 5) generation of sealed object 3 with the retaining that holds of spiro tooth part 13 rotation direction contraries, make sealed more closely, firmly, get loose to prevent Locking screw.

The above-mentioned extending section of carrying 2 is in other specific embodiment structure, and is also plastic between one section thread that spiro tooth part 13 is set, or is molded over spiro tooth part 13 and is positioned at shaft 12 free-ended terminal positions; Aforesaid extending section 2 is (as Fig. 1, shown in Figure 2), contain an expansion thread 21, this expansion thread 21 has the two thread faces 130 of two oblique angles with respect to spiro tooth part 13,131 ends, the extroversion that is an elevation angle is extended the expansion facing 22 of expansion, 23, thereby form the terminal tooth body structure of an expanding, and one with the radially relative vertical of shaft 12 and greater than the terminal tooth cross section 24 of spiro tooth part 13 sections, thereby can utilize expansion thread 21 to produce contrary retaining system function, and producing and the reverse retaining system of Hand of spiral anti-loose effect with respect to sealed object 3 sealed backs.

In other specific embodiment structure, above-mentioned at the integrated extending section 2 of spiro tooth part 13 1 ends, be to have the multi-fold type joint to connect expansion thread 21 moulding design, as shown in Figure 3, Figure 4, so, can obtain the export-oriented expansion facing that extends the angle expanding and shaping in the

more elevation angle

22,22 ', 23,23 ' etc., and produce more contrary retaining applying area of contact between the sealed object 3, to obtain better anti-loose effect.

According to aforementioned screw and the screw body 1 of the utility model with extending section 2, when carrying out sealed operation, no matter this extending section 2 is to have single or most joints to connect expansion thread 21 compositions, the builder rotates screw lock with this screw body 1 by corresponding sealed object 3 application of forces of inlet end, in whole sealed operation process, the sealed operation of the sealed relatively object 3 of this spiro tooth part 13 is just like the operation as habitually in the past, do not have conventional construction fully and at spiro tooth part prominent rib or groove is set and causes resistance when sealed; Simultaneously, the screw of the utility model ceramic material has the setting of not having prominent rib or groove between high hardness and the thread, thereby has preferable hardness and rigidity, not easy-rupturing.The utility model screw body 1 screws togather when finishing at sealed relatively object 3, this is positioned at the extending section 2 of spiro tooth part 13 1 ends, comply with screw togather rotation direction and relative closely with the thread groove of sealed object 3 easily, firmly screw togather, compared to the design of the prominent rib between known spiro tooth part cause back segment thread and sealed object can't be closely, firmly screw togather, have the preferable effect that relatively closely, firmly screws togather; And by the expansion thread 21 of this extending section 2, and produce between the thread groove of sealed object 3 with the retaining of the contrary rotation direction of thread and make usefulness, get loose with the screw after preventing to screw togather; As for will unload the operation of screw the time, only need execute brute force and oppositely compel to revolve this screw and screw body 1, make the expansion thread 21 that is positioned at screw body 1 and sealed object 3 sealed ends, rotary manipulation through short stroke A, withdraw from and the thread groove of sealed object 3 between sealed, as shown in Figure 5, can be as usual easily with the screw removal.

Above-mentioned is preferred embodiment of the present utility model only, is not to be used for limiting the utility model practical range.Be that all equalizations of doing according to claim of the present invention change and modification, be all claim of the present invention and contain.

Claims

1, a kind of anti-loose screw structural, its structure comprises: a screw body, this screw body include a force side, at the aforementioned extended shaft of force side one end and at the spiro tooth part of aforementioned shaft surface forming; It is characterized in that: this aforementioned spiro tooth part one end is provided with one to be made sealed more closely, firmly, and with the extending section that prevents that sealed screw from getting loose, this extending section forms sealed relatively object and produces and the holding and keep off and make firmly of thread rotation direction contrary.

2, anti-loose screw structural as claimed in claim 1, wherein, this extending section is one-body molded at spiro tooth part one end.

3, anti-loose screw structural as claimed in claim 1, wherein, this extending section is one-body molded at a spiro tooth part end adjacent with the force side.

4, anti-loose screw structural as claimed in claim 1, wherein, this extending section is one-body molded between one section thread that spiro tooth part is set.

5, anti-loose screw structural as claimed in claim 1, wherein, this extending section includes an expansion thread.

6, anti-loose screw structural as claimed in claim 1, wherein this extending section includes most the expansion threads of joint group mutually.

7, as claim 5 or 6 described anti-loose screw structurals, wherein, this expansion thread have with respect to sealed object produce contrary in the anti-loose effect of retaining system of thread rotation direction, two oblique angles become the export-oriented expansion facing that extends expanding and shaping in an elevation angle with respect to two thread faces of spiro tooth part are terminal, and one is radially relative with shaft vertical and greater than the tooth cross section end of spiro tooth part section.

8, anti-loose screw structural as claimed in claim 1, wherein, this screw body is that stupalith is one-body molded with expansion tooth section.