CN201925313U

CN201925313U - Anti-loosing mechanical screw

Info

Publication number: CN201925313U
Application number: CN2010206740435U
Authority: CN
Inventors: 沈伟勋
Original assignee: DESIGNING FUTURE TECHNOLOGY
Current assignee: DESIGNING FUTURE TECHNOLOGY
Priority date: 2010-12-22
Filing date: 2010-12-22
Publication date: 2011-08-10
Anticipated expiration: 2020-12-22

Abstract

The utility model relates to an anti-loosing mechanical screw which comprises a cap and a screw rod, wherein the screw rod is convexly arranged at one side of the cap. The screw rod is provided with external threads. Both sides of a plurality of crests of the external threads are used for forming asymmetric external threads with different angles of inclination. Both of the two sides of the crests of the external threads can form different angles. The angles of both of the two sides of the crests of the external threads can be 40 degrees to 49 degrees (also 51 degrees to 60 degrees). The angle of a preferred embodiment at one side is alpha, and the angle of the preferred embodiment at the other side is beta, i.e. beta equals to (40 degrees to 49 degrees) minus alpha, and alpha is greater than beta, so that the asymmetric external threads can be formed on the screw rod. When the screw is locked in the cap, the purpose of increasing the friction and engaging area between the external threads and the internal threads of the cap is reached, and the screw is difficult to loosen and disengage.

Description

Anti-loosening MACHINE SCREWS

Technical field

The utility model provides a kind of anti-loosening MACHINE SCREWS, especially refer in the asymmetric formula outside thread of screw rod moulding to increase stable, the difficult loosening screw of interlocking, by the externally threaded a plurality of spiral shells of moulding on screw rod peak two sides, has different angles of inclination respectively, during then with relative nut interlocking, increase friction, occlusal contact area between outside thread and internal thread, reach the difficult purpose of becoming flexible or breaking away from.

Background technique

Jie Chu many apparatus in daily life, machinery, furniture or article etc., in manufacturing, during assembled formation, the capital utilizes screw to cooperate nut to lock, group constitutes complete object, general screw in order to locking, nut, major part all is the metric system screw (being of a size of a millimeter mm) or the screw made in Great Britain (being of a size of inch inch) of standard, and the wood screw in order to the interlocking wooden object is arranged, no matter and be the screw of which kind of pattern, its spiral angle all is fixing, and during with the nut interlocking of same types, if it is excessive to lock power, the phenomenon of sliding tooth easily takes place, and causes thread damage, can't interlocking, but too little if lock power, can produce the untrue situation of interlocking, easily get loose phenomenon, cause interlocking insecure; Then in order to solve screw and the nut problem when the interlocking, the dealer is also arranged, and (or pad Washer), carry out interlocking with nut again, but screw must have suitable length, just can wear packing ring, has also formed the restriction when screw uses at screw upper sleeve through packing ring; Other has the dealer to utilize between the screw thread of screw to fill in into nylon glue, be shaped to the screw that how to fall, with by the nylon glue on the screw, have the effect of damping behind the generation interlocking, and prevent that screw from the situation of oppositely circling round taking place, but when causing the screw that how to fall to desire interlocking also, because of the backstop that is subjected to nylon glue is difficult for locking nut, cause present employed various types screw, in practical application, when implementing, all there are a little inconvenience and puzzlement, as:

(1) present employed various screw, the externally threaded helix angle of its moulding all is symmetric types, and screw is with after nut cooperates interlocking, the screw thread of interlocking interlock is small part (about reach 1/3) only, and between the screw thread of interlocking, form the slit easily, situation loosening or that come off promptly takes place easily, causes the interlocking instability.

(2) the outside thread two side angle degree of screw are identical and symmetrical, and too greatly then the outside thread degree of depth is more shallow as if spiral angle, and the occlusal contact area when causing interlocking between outside thread and internal thread is few, and are easier to be loosening.

(3) the outside thread two side angle degree of screw are identical and symmetrical, if the too little then outside thread of the spiral angle degree of depth is darker, Luo Feng is comparatively sharp-pointed, screw weakened, fracture easily, the then interlock between outside thread and internal thread when interlocking causes spiral shell peak avalanche phenomenon easily, and it is insecure to influence interlocking.

Therefore, how solving present employed screw is the design of fixed dimension pattern because of screw thread, then with the nut interlocking that cooperates after, the problem that generation gets loose easily, and the reach of its moulding of screw of using at present president not, be easy to generate interlocking not really, be subjected to disappearances such as the external force vibrations are promptly turned round, disengaging, be the direction place that the relevant manufacturer that is engaged in the industry desires most ardently the research improvement.

Summary of the invention

So, the creator is because above-mentioned problem and disappearance, collect related data, via assessing in many ways and considering, and to engage in the many years of experience of the industry accumulation, via constantly studying and revising, the beginning is designed this kind in the asymmetric formula outside thread of the screw rod moulding of screw, the patent of the interlock when increasing outside thread and internal thread interlocking, area of contact, the difficult anti-loosening MACHINE SCREWS of becoming flexible.

Main purpose of the present utility model is the screw rod that the first side of the cap of this MACHINE SCREWS is convexly equipped with, be provided with outside thread in screw rod, and externally threaded a plurality of spiral shell cutting edge of a knife or a sword two sides, be the different sizes of moulding, the asymmetric formula outside thread of differing tilt angles, the angle of then externally threaded a plurality of spiral shells peak two sides can be between 40 °～49 ° (also can be 51 °～60 °), one side preferred embodiment is α °, the side preferred embodiment then is β °=(40 °～49 °)-α ° (also can be (51 °～60 °)-α °) in addition, and can be the design of α °＞β °, for the asymmetric outside thread of moulding on the screw rod, then when screw and nut interlocking, reach between the internal thread that increases outside thread and nut and rub, the purpose of occlusal contact area, and be difficult for loosening the disengaging.

Secondary objective of the present utility model is on the screw rod of this MACHINE SCREWS, form asymmetric formula outside thread, and the angle of externally threaded a plurality of spiral shells peak two sides, can be between 40 °～49 °, then two sides are the angle of inclination of the different sizes of tool, and a side can be between 20 °～25 °, and the angle of preferred embodiment can be 21 °; Side can be between 22 °～29 ° in addition, and the angle of preferred embodiment promptly can be 27 ° Design Mode.

A purpose more of the present utility model is on the screw rod of this MACHINE SCREWS, form asymmetric formula outside thread, and the angle of externally threaded a plurality of Luo Feng, can be between 51 °～60 °, and can be the angles of inclination of the different sizes of tool in two sides, the one side can be between 25 °～29 °, and the angle of preferred embodiment is 26 °; Side can be between 27 °～35 ° in addition, and the angle of preferred embodiment then can be 31 °.

A kind of anti-loosening MACHINE SCREWS comprises the screw rod that cap head and the first side of cap are convexly equipped with, and this screw rod is provided with the asymmetric formula outside thread that is differing tilt angles in a plurality of spiral shells peak two sides.

This screw rod is provided with the outside thread of asymmetric formula, and the angle of externally threaded a plurality of Luo Feng is 40 °～49 °, and two sides are the angle of inclination of the different sizes of tool.

These a plurality of spiral shells peak two sides are the angle of inclination of different sizes, and a side is 20 °～25 °; Side is 22 °～29 ° in addition.

This screw rod is provided with the outside thread of asymmetric formula, and the angle of externally threaded a plurality of Luo Feng is 51 °～60 °, and two sides are the angle of inclination of the different sizes of tool.

These a plurality of spiral shells peak two sides are the angle of inclination of different sizes, and a side is 25 °～29 °; Side is 27 °～35 ° in addition.

This cap head is outer-hexagonal cap head, interior hexagonal nuts head, a word cap head or cross cap head.

Useful technique effect of the present utility model is: form friction type interlock interlocking between outside thread and internal thread, be difficult for looseningly, and outside thread and internal thread do not form the gap, only makes the firm interlocking of screw rod at nut, do not rock or shake because of external force to become flexible or break away from.

Description of drawings

Fig. 1 is a stereo appearance figure of the present utility model,

Fig. 2 is a side view of the present utility model,

Fig. 3 is the stereo appearance figure of the utility model preferred embodiment,

Fig. 4 is the side cutaway view of the utility model preferred embodiment,

Fig. 5 is the partial enlarged drawing of the utility model the 4th figure part.

Description of reference numerals

1-cap head; The 2-screw rod; The 21-outside thread; 211-Luo Feng; The 3-nut; The 30-occlusal contact area; The 31-internal thread; α-angle of inclination; β-angle of inclination.

Embodiment

For reaching above-mentioned purpose and effect, technological means that the utility model adopted and structure thereof, drawing now illustrates in detail that with regard to preferred embodiment of the present utility model its feature and function are as follows, understand fully in order to do profit.

See also shown in Fig. 1-4, be the stereo appearance figure of stereo appearance figure of the present utility model, side view, preferred embodiment, the side cutaway view of preferred embodiment, find out by knowing among the figure, anti-loosening MACHINE SCREWS of the present utility model, comprise cap head 1 and the screw rod 2 that protrudes out by cap head 1 one side direction outward, wherein:

On the screw rod 2 of these cap head 1 one sides, form outside thread 21, and outside thread 21 is the asymmetric formula design of differing tilt angles respectively in a plurality of spiral shells peak 211 2 sides, the tilt angle alpha of then a plurality of spiral shells peak 211 1 sides, the inclination angle beta of side in addition, and can be the Design Mode of tilt angle alpha＞β.

And on the screw rod 2 of cap head 1 one sides of MACHINE SCREWS, form asymmetric formula outside thread 21, and one of the angle preferred embodiment at the spiral shell peak 211 of outside thread 21, can be between 40 °～49 °, then tilt angle alpha, the β of the different sizes of two side tools, and the inclination angle beta of a side=(40 °～49 °)-α °, can be between 20 °～25 °, and the angle of preferred embodiment can be 21 °; In addition the tilt angle alpha of side ° can be between 22 °～29 °, and the angle of preferred embodiment can be 27 ° Design Mode, and tilt angle alpha＞β.

Moreover, the screw rod 2 of cap head 1 one sides of this MACHINE SCREWS, form asymmetric formula outside thread 21, and another preferred embodiment of angle at the spiral shell peak 211 of outside thread 21, can be between 51 °～60 °, and can be tool different big or small tilt angle alpha, β, one inclination rake angle β=(51 °～60 °)-α ° in two sides, can be between 25 °～29 °, and the angle of preferred embodiment is 26 °; In addition inclination oblique angle α can be between 27 °～35 °, and the angle of preferred embodiment can be 31 °, and tilt angle alpha＞β.

The screw rod 2 of cap head 1 one sides of this MACHINE SCREWS, form asymmetric formula outside thread 21, and the angle at a plurality of spiral shells peak 211 of outside thread 21 also can have other preferred embodiments, and by the asymmetric formula design of a plurality of spiral shell cutting edges of a knife or a sword 211 2 side differing tilt angles α, the β of outside thread 21, avoid outside thread 21 suitable height of thread of moulding on screw rod 2, unlikely too dark or too shallow, promptly be difficult for causing screw rod 2 to rupture or the phenomenon of a plurality of spiral shells peak 211 avalanches.

Again, the cap head 1 of the utility model MACHINE SCREWS, can be the design of outer-hexagonal cap head, interior hexagonal nuts head, a word cap head, cross cap head or outer polygonal cap head or inner polygon cap head, for open-end wrench, inner hexagon spanner, plum blossom shaped spanner, ratchet wrench, a word bottle opener, cross driver or the socket wrench etc. of relative pattern, the cap head 1 of various hand tools driving device screws and screw rod 2.

See also Fig. 3,4, shown in 5, stereo appearance figure for the utility model preferred embodiment, the side cutaway view of preferred embodiment, the partial enlarged drawing of Fig. 4 part, find out by knowing shown in the figure, the utility model MACHINE SCREWS is when interlocking, utilize cap head 1 to drive screw rod 2 interlockings when the nut 3 of relative pattern, lock by the outside thread 21 of screw rod 2 in the internal thread 31 of nut 3, and be differing tilt angles α by outside thread 21 2 sides, the design of β, then increase for the occlusal contact area 30 of outside thread 21 with internal thread 31, produce friction type interlock interlocking, form outside thread 21 tight interlockings, be incorporated in the internal thread 31, and do not form the gap in occlusal contact area 30 places, can prevent that MACHINE SCREWS from loosening phenomenon taking place in nut 3, the screw rod 2 firm interlockings that can reach MACHINE SCREWS can not be subjected to rocking of external force in the effect of nut 3, vibration influence and loosening or break away from.

Therefore, the above only is preferred embodiment of the present utility model, non-so limit to claim of the present utility model, the cap head 1 of the utility model MACHINE SCREWS, one side convexes with screw rod 2, and moulding outside thread 21 on the screw rod 2, a plurality of spiral shells peak 211 2 sides of outside thread 21 are for being different sizes, differing tilt angles α, the design of β, then by screw rod 2 interlockings when the nut 3, in order to do 31 of the internal threads that can reach the asymmetric outside thread 21 that utilizes screw rod 2 and nut 3, form firm friction type interlock interlocking, be difficult for loosening purpose, and a plurality of spiral shells peak 211 2 sides of utilizing outside thread 21 are asymmetric tilt angle alpha, β, then and 31 of internal threads, do not produce the gap behind the interlocking, it is loosening to have a firm interlocking, the effectiveness that does not break away from, so can reach the structure of aforementioned effect such as, device is contained by the utility model all should, simple and easy modification of this kind and equivalent structure change, and all should in like manner be contained in the claim of the present utility model, close and give Chen Ming.

The anti-loosening MACHINE SCREWS of above-mentioned the utility model is in practical application, when implementing, for can having following advantage, as:

(1) screw rod 2 that protrudes out of cap head 1 one sides of MACHINE SCREWS, be provided with asymmetric formula outside thread 21, and in the asymmetric formula design of the different sizes of a plurality of spiral shells peak 211 2 side moulding, differing tilt angles α, β, with 31 of the internal threads by asymmetric outside thread 21 and nut 3, form the interlocking of friction biting type, reach firm interlocking, be difficult for loosening effect.

(2) outside thread 21 of the asymmetric formula of moulding on the screw rod 2, for have the design of differing tilt angles α, β in a plurality of spiral shells peak 211 2 sides, can on screw rod 2, keep appropriate height of thread, unlikely too dark or too shallow, then during internal thread 31 interlockings of outside thread 21 and nut 3, be difficult for taking place the phenomenon of screw rod 2 fractures or 211 avalanches of a plurality of spiral shells peak.

So; the utility model is the design that is primarily aimed at MACHINE SCREWS; the screw rod that utilizes the first side of cap to protrude out; the asymmetric formula outside thread of moulding; and two sides that supply externally threaded a plurality of Luo Feng have different sizes, differing tilt angles; then during the internal thread interlocking of the asymmetric formula outside thread of screw rod and nut; form friction type interlock interlocking, the difficult loosening main key protection point that is between outside thread and internal thread and can reach; and outside thread and internal thread do not form the gap; only make the advantage of the firm interlocking of screw rod, do not rock or shake and become flexible or break away from because of external force at nut.

More than be illustrative to description of the present utility model; and it is nonrestrictive; those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall in the protection domain of the present utility model all.

Claims

1. an anti-loosening MACHINE SCREWS comprises the screw rod that cap head and the first side of cap are convexly equipped with, and it is characterized in that:

This screw rod is provided with the asymmetric formula outside thread that is differing tilt angles in a plurality of spiral shells peak two sides.

2. anti-loosening according to claim 1 MACHINE SCREWS is characterized in that this screw rod is provided with the outside thread of asymmetric formula, and the angle of externally threaded a plurality of Luo Feng is 40 °～49 °, and two sides are the angle of inclination of the different sizes of tool.

3. as anti-loosening MACHINE SCREWS as described in the claim 2, it is characterized in that these a plurality of spiral shells peak two sides are the angles of inclination of different sizes, a side is 20 °～25 °; Side is 22 °～29 ° in addition.

4. anti-loosening according to claim 1 MACHINE SCREWS is characterized in that this screw rod is provided with the outside thread of asymmetric formula, and the angle of externally threaded a plurality of Luo Feng is 51 °～60 °, and two sides are the angle of inclination of the different sizes of tool.

5. as anti-loosening MACHINE SCREWS as described in the claim 4, it is characterized in that these a plurality of spiral shells peak two sides are the angles of inclination of different sizes, and a side is 25 °～29 °; Side is 27 °～35 ° in addition.

6. anti-loosening according to claim 1 MACHINE SCREWS is characterized in that, this cap head is a word cap head, cross cap head, outer polygonal cap head or inner polygon cap head.