CA2132943C - Half nut capable of engaging resiliently another half nut - Google Patents
Half nut capable of engaging resiliently another half nutInfo
- Publication number
- CA2132943C CA2132943C CA002132943A CA2132943A CA2132943C CA 2132943 C CA2132943 C CA 2132943C CA 002132943 A CA002132943 A CA 002132943A CA 2132943 A CA2132943 A CA 2132943A CA 2132943 C CA2132943 C CA 2132943C
- Authority
- CA
- Canada
- Prior art keywords
- screw thread
- half nut
- internal
- nut
- thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 210000002320 radius Anatomy 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 description 2
- 241001024304 Mino Species 0.000 description 2
- 101100087530 Caenorhabditis elegans rom-1 gene Proteins 0.000 description 1
- 241000353097 Molva molva Species 0.000 description 1
- 101100305983 Mus musculus Rom1 gene Proteins 0.000 description 1
- VREFGVBLTWBCJP-UHFFFAOYSA-N alprazolam Chemical compound C12=CC(Cl)=CC=C2N2C(C)=NN=C2CN=C1C1=CC=CC=C1 VREFGVBLTWBCJP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
- F16B39/18—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut in which the locknut grips with screw-thread in the nuts as well as on the bolt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Bolts, Nuts, And Washers (AREA)
- Transmission Devices (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Surgical Instruments (AREA)
Abstract
A half nut has a short shank with an external screw thereon and an inner wall which confines an axial hole therein. The inner wall has an internal screw thread with a first screw pitch . The external screw thread of the half nut has a second screw pitch different from the first screw pitch. The internal and external threads are substantially concentric. The external screw thread of the half nut is defined by substantially constant major and minor radii, while the internal screw thread is defined by substantially constant greatest and shortest radii. The internal screw thread has a constant half-breadth which is greater than a difference between the minor and greatest radii.
Description
1 1 4 2 ~
.
~AL~ NttT CAPABL~ O~ ~NGAGIN~ 5BIL~EN~L5r ANC~HER ~:
H~L~ NUT ~ :
U~XGP~OUND O~ THE ~EN~ IN -1. FI~LD OF q'HE INVEN'rION
This inventlon relates to a half nut, more p~rticularly to a halP nut which is oapable of enga~ g resiliently anothRr half nut so as to form a nut member ~or fast~nin~ ob~ect$ together with a threaded bol~. : ';
.
~AL~ NttT CAPABL~ O~ ~NGAGIN~ 5BIL~EN~L5r ANC~HER ~:
H~L~ NUT ~ :
U~XGP~OUND O~ THE ~EN~ IN -1. FI~LD OF q'HE INVEN'rION
This inventlon relates to a half nut, more p~rticularly to a halP nut which is oapable of enga~ g resiliently anothRr half nut so as to form a nut member ~or fast~nin~ ob~ect$ together with a threaded bol~. : ';
2 . DE~S~RIPTION OF THE R~A~EI~ ART ' AcGordintJ to th~ U. S. Pat. No. 5,248,23~, ~here ~ ~:
is disclosed a nu~ and ~olt fiet which includes a nut :
member havin~ two halve~ and a threaded bolt en~agea~le with the two halves. The combination o~ the. two halves ' ; .
togethqr with the threaded bolt provides a lo~cing m~c:hanism which does ~ot easily get loose when an external force ~ applied th~reon~
.
SU~l~Y OF THE YNv~ 5 IC~N - ::
l'he main object of ~he present invention is to ~ ~;
improve the ~tructure of one of the half nut6 of the ;~ ':
nut mem~er so that a r~ilien~ abutting enyagement ~ ;
l~etween the hal~ nllt can be achieved when the halî nuts ~re used to fasten objects together with a threaded : ~.
I~ol'c .
Aocordingly, th~ half nut ~f this inventi~r~ h~s a 2~ sho~t ~hank with an external screw thread th~reon, and an inner ~all which con~ines an axial bore..' ~he~ethrouyh. The inn~.r wall of the half nut has an ~ ; :
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2132943 ~ ~
internal s~rew thread with a ~ir~t scr~w pit~h. The e~ternal screw thxead of the hal~ nut has a ~econd ~rew pit~h dif~erent from the first sorew piteh. The internal and external screw threads of the hal~ nut axe suh~tantially concentri.c with e~ch other. The external ~~crew thread of the hal.f nut is de.~ined l~y ~ub~tanti~lly constan~ major and minor radii, while the internal s~rew thread is def ined by substantially aonstant gre~test and shorte~t radii. ~he internal ~crew thread of the half nut has ~ constant half~
breadth whieh i~ greater than a differen~e between the minor and ~reate.~t radii.
In the di~clos~d e~bodiment, the fir~t screw pit¢h o~ the internal ~crew thread o~ the half nu~ is grea~er than the second screw pitch of the external ~rew thread of the half nu~
In one çmbodiment, the minor radius of the exte~nal . . . ..
s~rew ~hread i~ ~rea~er than the ~reatest radi~s of the in~ernal ~raw ~hx ead .
In ano~her embodiment, the yreates~ r~dius o~ the intern~tl ~crew thre~d is greater than the. mino~ radius of the external sc~ew threAd.
The h~lf n~lt o~ ~hi~ irtve.ntion ~oope~tes wlth ~;;
an~thRr half n~t and a threaded holt to fo~nt a fixin~
~5 means which consequently provides a resilieht abutting en~agement when ~he fixin~ me~ns is used ~o fA~t~n ob;ect~ toqether. --. ' . .
~ ~~3~~ :
~329~3 ~ ~
BRIEP D138CRXPq'ION C)P q~ltE DRP~WI;NG~
O~her feature~ and advantages of the present invention will bec~me n~ore ~ppa~eh~ in the followi.ny detailed descripti~n of the preferred embodiment with referen~e to the accompanyiny drawings, in which~
Figures l~A) and l(B) ~how cro~ sec~ional viçw~ of ~o halves o~ ~ nLlt nlember 0~ tlle presen~ in~ention;
Figure 2 i.s ~n enlarged view of the Gircle "F"
shown in Fig~
Figure 3 ~how~ the half nut of ~he present inv~ntion when cooperating with a threaded bolt to ~a~ten objects together;
Figure 4 shows the half nut of the present 1nvsntion when coop~r:ating with the threaded bol~ and an~ther hal.f nut ~f the nut mt~mher to fasten two ob~ats toyether;
Figure 5 illustrat~s the direction~ of force~ which are pre~ent in the two halves of the nut memher after two objec.~s have behn ~astened together with the u~e of a o the Bame Fi~ure ~ ~how~ ~nother preferred em~odiment o~ the hal~ nut. ~f t},~ present invention together With another . ." , lla 1 f nut; and ~ ' Fig~lr~ 7 ~how. ~he anothe~ preferred embodiment of the pre~ent invention when cooperating with the ;
~hreaded bolt ~nd another half nu~ of the nut member.
: DE~AI~E~ DE~CR~PTION OF THE PR~FE~RED EM~ODIMEN~
CA 02132943 1998-0~-27 Referring to Figures l(A) and l(B), a fixing means includes a nut member and a threaded bolt to be inserted threadedly in the nut member. The nut member includes a first half 1 and a second half 2. The first half 1 includes a short shank 12 with a predetermined iength L1 and an external screw thread 120 thereon, and an inner wall 13 which confines an axial bore therein and which has an internal screw thread 130 with a first screw pitch. The external screw thread 120 of the first half 1 has a second screw pitch which is different from the first screw pitch of the internal screw thread 130, and the internal and external threads 120, 130 are substantially concentric with each other.
The second half 2 has a threaded bore with first and second sections 210, 220 of differing radii. The second section 220 is narrower than the first section 210 which has the first screw pitch. The second section 220 has the second screw pitch. The first section having the first screw pitch is engageable with the external screw thread 120 of the first half 1.
Referring to Figure 2, the external screw thread 120 of the first half 1 is defined by a substantially constant major radius dl which is a vertical length between the dotted line "P" and the axis "C" of the first half 1, and a substantially constant minor radius d2 which is a vertical length between the dotted line N and the axis "C". The internal screw thread 130 of the first half 1 is defined by a substantially constant ~ ~~5-~ 2~32943 ~reatest raclius d3 which iB a ver~ic~l length ~etWeen ~ ~:
the dotted line "M~ and the axis ~ o~ the ~irst half 1, and a sub~tantially eonstant shortest radius d4 ~ :
whi~h is a vertiaal length between th~ dotted line "Q"
and the axis ~C" of the Pirst h~l~ 1. The minor radius d2 o~ the external screW thread 120 o~ the first half 1 -~
is gre~e~ t}lan the greates~ radiu~ d3 oE ~he internal -~-s~r~w thread 130. ~he internal screw thread 130 has a , -, ~, constant half-breadth "X" which is ~e~ter thAn a differe~lce ~Y" between the minor and yreatest r~dii d2, d3. The ~vn~ant half-hread~h "X" is a ~ross-sec~ional width whiGh is measured ~t h~lf of a vertical heiyht between a tip point and a ~ottom of the internal scrsw thread 130, i. e. hetween the dotted lines "M~
ancl "~ he dott~d line "M", whi.ch is drawn horizon~ally at ~he dis~A1 end points of tlle grea~e~t radii d3, i9 nearer to the axis IIC'I when compared to ~ht~ dotted line ~N~ Which is drawn hori~ontally at the di6tal erld polnts o~ the mino~ radii d2. :
2C ~eferring to FicJ. 3, when in use, ~he threaded bolt ~ is insertsd through two objeats 90, and the ~irst ~.
half 1 is screwed onto the ~hrea~ed bolt 3. A wa~her 31 ~an.be provided between the ~ir~t h~lf land the o~eat~ 90. Note tha~ the first screw pitoh of the ~5 interna.l screw thread 130 i5 greate~ ~han the second screw pit~h of ~he external screw thread 120 o~ the first half 1. ~he threaded ~lt 3 has the ~me pitch ~ , ~s the internal screw thread 1~0 of the ~irst half 1 such th~, when the latter is ti~htened relative to the former, an axial ten~ and compression force is generated be~ween ~he threaded bolt 3 and the internal screw ~hread 1~0 o~ the first half 1. ~he force correspondingly cau~es ~he ~hreaded bolt 3 and the first half 1 to move in opposed directlons ~rom th~
o~jeots 90, thereby fastenlny the lat;te~. ~o~e that, sincq the head portion 11 of the l~irst halP 1 has a thickne~s whi~h is gr~ater than the ~han~ l~ and therefore possesses a greater strength, deformatiol1 of the thread withirl the ~hank 12 is more severe th~n th~t within the head portion 11. The dotted circle (A) suf~ers the greatest thread deformation while the dotte~ circle (C) suf~rs the leas~ ~hread deforma~ion.
The shank portion ~2 of the firs~ half l, beincJ weaker than thb head portion 11, is corr~pondingly compre~sed axially, whe~ein the shank portion 12contracts such that it pos~esses a length L2 which is shorter than the ~, . , length L1, ~s shown in FicJ. 1.
Refe~ring to Figur~ 4, the ~econd half 2 is tightened on ~he ex~ernal s~'rew thread 120 of the first hal~ e~ause ~he ~ir~t and second sections 210, 220 hava di~ering screw pi~ches, and since the screw pitch ~ the second section 220 is greater than the screw pitc~ of the firs1: seotion 210, a ~ull turn of tne s~cond half 2 ~auses t~e second section 220 ~ move a . "'"'' '"'' '''''". ' .,:' '.', full leng~h of its ~c~e~ pitch while the first section 210 moves a lenqth g~eater that its screw pit~h, thereby compressing the first sec~lon 210 of the ~econd half 2 ~arther ~oward ~he first half-l. Thus, the short 5hank 12 of the first half l is compressed axially by the rotation of the second half 2 ~elative to ~he shank 12 o~ the first half 1 su~h that the length of the shank 12 shorten~ to L3 which is shorter than the length L2 of the shank 12 bafore the second o half 2 is threaded thereon. Unde~ such a condi~ion, a resilient abu~ting engagement is generated bet~een the external s~rew thread 120 of ~he first half 1 and the second section ~20 of the second half 2 due to the thickness reduction at the shank 12. The portion in:
the dotted circle (c') suffers ~he most seve~e thread deformation while the portion in the dotted cir~e (A') suffers the le~st thread deformation. ~ote that the forces whi~h are generated by t~e firs~ and second halves 1, 2 after the fi~st half 1 has been threaded on the threaded bolt 3 and the ~econd halr 2 has been threaded on the shank 12 of the first half ~ are counter-balanced s~ch that they provide f irm engagement - between the ob j ects 90.
. Referring to ~ig . 5, note that the objects 90 are engaged stationarily after the first half 1 is tightened on the thre~ded bolt 3. Under this condition, the threaded bolt 3 causes a compression ~ ~ 21 329 ~ 3 force (P) on tlle o~e~ts ~0 which is countere~ by the force (Pl) gen~trateà bet~een the first half ~ and the ~hreaded ~ 3. When t}~e second half 2 i~ ti~htened relative to the sh~nk 12 of tl~e fir~;t half 1, an axial ~ompre~sion foroe (Ps) i~ produeed betwee.n the external gcrew thread 1~0 of the fir~t half 1 and the first :3ection 210 of ~he ~ec:ond h~l~ 2. ~hen the objects 90 are at a stativna~y position, the compression ~orce (P~) is equi~a~ent to th~ compression f~-ce (P1) which is produ~ed by th~ ~irst half 1~ In case ah external ~orce which is çlreater than (Ps) is appliecl on the fas~ened objecl~s 90, the force (P1) serv~s as a compensating force to prevent the fastenecl obje~t~ 0) ~rom 1~ing mavecl.
. .
lS Re~erri.ng to ~igure 6, in another preferred ~ .;
embodiment, ~he half nut has an external screw thread 520 for~ned on the short ~hank 52 and an i~ernal sorew .; .
thread 530 formed on an inner wall surf~e whicn ~on~ine~ an axial bore th~rethrough. The internal ; ~
sar~w th~ead ~3û has a constant half-b~eadth (T) which '. :-i9 greater ~han the differehce (S) be~ween t}le minor ~.'.
and greatest diameter~ d5, d~. In this embodiment, ~he ~.
greatest cliam~ter jd5 of the internal ~cr~w thread $30 is greater than the minor diamete~ d6 of the external ~5 scre~ thread 520. Tllus a thic};ness bet~Je~n the internal and external screw threads 520, 530 is aaaordingly redu~ed so the tips o~ the internal and ._ external screw threads 520, 530 closely overlap with - one another.
n ~se, the threaded bolt 7 is inserted through the - first half 5 and the second half :6 is th~eaded on-the latter such that an axial tensile and compression force is generated between the in~ernal screw thread 530 and the threaded bolt 7 ~t the positions (H) and (I). When the second half ~ i~ sleeved so as to be tightened on the shank 52 of the firs~ half ~, an abutting engagement is generated at the position ~G), an axial tensile and compression ~orce is generated at the position (K), while a ~esilien~ abuttiny engagement is . generated at the positions (~) between the external screw thread of ~he short shank 52 of the first half 5 and the internal screw threa~ of the f irst section 61 of the second half ~. Therefore, the engagement provided by the half nut 5 of the present invention is f irm.er than tha~ disclosed in the previously cited U. S. Patent.
As explained above, the i~proved ~tructure o~ the first ha-lf 1 o~ the nut me~be~ pro~ides a resilient abutting engagement in cooperation with the s~cond half 2 and the th~eaded bolt 3. Thus, the ob~ec~s 90fastened by the nut-and-bolt set which includes the hal~ nut 1 of the present invention is firmer when compared to the conventional nut and bolt set.
With the invention thus ex.plained, it is obvious ~ --~10----2132943 : :~
to t~ose s~.illed in the art th~t v~rious modific~tions and variations can be madR wit~lout departing from the ~;
scope and spirit thereof. It is therefore intended that this invention be limited only as indicat~d in the appended claim~
~ .,, .. : ~:
,. ~,,.
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is disclosed a nu~ and ~olt fiet which includes a nut :
member havin~ two halve~ and a threaded bolt en~agea~le with the two halves. The combination o~ the. two halves ' ; .
togethqr with the threaded bolt provides a lo~cing m~c:hanism which does ~ot easily get loose when an external force ~ applied th~reon~
.
SU~l~Y OF THE YNv~ 5 IC~N - ::
l'he main object of ~he present invention is to ~ ~;
improve the ~tructure of one of the half nut6 of the ;~ ':
nut mem~er so that a r~ilien~ abutting enyagement ~ ;
l~etween the hal~ nllt can be achieved when the halî nuts ~re used to fasten objects together with a threaded : ~.
I~ol'c .
Aocordingly, th~ half nut ~f this inventi~r~ h~s a 2~ sho~t ~hank with an external screw thread th~reon, and an inner ~all which con~ines an axial bore..' ~he~ethrouyh. The inn~.r wall of the half nut has an ~ ; :
' . , .
', ",.:','.,.', "'':. :.
. "' '' ~
,.i jy~
'''~, ,. ~
' r~~ --2~
2132943 ~ ~
internal s~rew thread with a ~ir~t scr~w pit~h. The e~ternal screw thxead of the hal~ nut has a ~econd ~rew pit~h dif~erent from the first sorew piteh. The internal and external screw threads of the hal~ nut axe suh~tantially concentri.c with e~ch other. The external ~~crew thread of the hal.f nut is de.~ined l~y ~ub~tanti~lly constan~ major and minor radii, while the internal s~rew thread is def ined by substantially aonstant gre~test and shorte~t radii. ~he internal ~crew thread of the half nut has ~ constant half~
breadth whieh i~ greater than a differen~e between the minor and ~reate.~t radii.
In the di~clos~d e~bodiment, the fir~t screw pit¢h o~ the internal ~crew thread o~ the half nu~ is grea~er than the second screw pitch of the external ~rew thread of the half nu~
In one çmbodiment, the minor radius of the exte~nal . . . ..
s~rew ~hread i~ ~rea~er than the ~reatest radi~s of the in~ernal ~raw ~hx ead .
In ano~her embodiment, the yreates~ r~dius o~ the intern~tl ~crew thre~d is greater than the. mino~ radius of the external sc~ew threAd.
The h~lf n~lt o~ ~hi~ irtve.ntion ~oope~tes wlth ~;;
an~thRr half n~t and a threaded holt to fo~nt a fixin~
~5 means which consequently provides a resilieht abutting en~agement when ~he fixin~ me~ns is used ~o fA~t~n ob;ect~ toqether. --. ' . .
~ ~~3~~ :
~329~3 ~ ~
BRIEP D138CRXPq'ION C)P q~ltE DRP~WI;NG~
O~her feature~ and advantages of the present invention will bec~me n~ore ~ppa~eh~ in the followi.ny detailed descripti~n of the preferred embodiment with referen~e to the accompanyiny drawings, in which~
Figures l~A) and l(B) ~how cro~ sec~ional viçw~ of ~o halves o~ ~ nLlt nlember 0~ tlle presen~ in~ention;
Figure 2 i.s ~n enlarged view of the Gircle "F"
shown in Fig~
Figure 3 ~how~ the half nut of ~he present inv~ntion when cooperating with a threaded bolt to ~a~ten objects together;
Figure 4 shows the half nut of the present 1nvsntion when coop~r:ating with the threaded bol~ and an~ther hal.f nut ~f the nut mt~mher to fasten two ob~ats toyether;
Figure 5 illustrat~s the direction~ of force~ which are pre~ent in the two halves of the nut memher after two objec.~s have behn ~astened together with the u~e of a o the Bame Fi~ure ~ ~how~ ~nother preferred em~odiment o~ the hal~ nut. ~f t},~ present invention together With another . ." , lla 1 f nut; and ~ ' Fig~lr~ 7 ~how. ~he anothe~ preferred embodiment of the pre~ent invention when cooperating with the ;
~hreaded bolt ~nd another half nu~ of the nut member.
: DE~AI~E~ DE~CR~PTION OF THE PR~FE~RED EM~ODIMEN~
CA 02132943 1998-0~-27 Referring to Figures l(A) and l(B), a fixing means includes a nut member and a threaded bolt to be inserted threadedly in the nut member. The nut member includes a first half 1 and a second half 2. The first half 1 includes a short shank 12 with a predetermined iength L1 and an external screw thread 120 thereon, and an inner wall 13 which confines an axial bore therein and which has an internal screw thread 130 with a first screw pitch. The external screw thread 120 of the first half 1 has a second screw pitch which is different from the first screw pitch of the internal screw thread 130, and the internal and external threads 120, 130 are substantially concentric with each other.
The second half 2 has a threaded bore with first and second sections 210, 220 of differing radii. The second section 220 is narrower than the first section 210 which has the first screw pitch. The second section 220 has the second screw pitch. The first section having the first screw pitch is engageable with the external screw thread 120 of the first half 1.
Referring to Figure 2, the external screw thread 120 of the first half 1 is defined by a substantially constant major radius dl which is a vertical length between the dotted line "P" and the axis "C" of the first half 1, and a substantially constant minor radius d2 which is a vertical length between the dotted line N and the axis "C". The internal screw thread 130 of the first half 1 is defined by a substantially constant ~ ~~5-~ 2~32943 ~reatest raclius d3 which iB a ver~ic~l length ~etWeen ~ ~:
the dotted line "M~ and the axis ~ o~ the ~irst half 1, and a sub~tantially eonstant shortest radius d4 ~ :
whi~h is a vertiaal length between th~ dotted line "Q"
and the axis ~C" of the Pirst h~l~ 1. The minor radius d2 o~ the external screW thread 120 o~ the first half 1 -~
is gre~e~ t}lan the greates~ radiu~ d3 oE ~he internal -~-s~r~w thread 130. ~he internal screw thread 130 has a , -, ~, constant half-breadth "X" which is ~e~ter thAn a differe~lce ~Y" between the minor and yreatest r~dii d2, d3. The ~vn~ant half-hread~h "X" is a ~ross-sec~ional width whiGh is measured ~t h~lf of a vertical heiyht between a tip point and a ~ottom of the internal scrsw thread 130, i. e. hetween the dotted lines "M~
ancl "~ he dott~d line "M", whi.ch is drawn horizon~ally at ~he dis~A1 end points of tlle grea~e~t radii d3, i9 nearer to the axis IIC'I when compared to ~ht~ dotted line ~N~ Which is drawn hori~ontally at the di6tal erld polnts o~ the mino~ radii d2. :
2C ~eferring to FicJ. 3, when in use, ~he threaded bolt ~ is insertsd through two objeats 90, and the ~irst ~.
half 1 is screwed onto the ~hrea~ed bolt 3. A wa~her 31 ~an.be provided between the ~ir~t h~lf land the o~eat~ 90. Note tha~ the first screw pitoh of the ~5 interna.l screw thread 130 i5 greate~ ~han the second screw pit~h of ~he external screw thread 120 o~ the first half 1. ~he threaded ~lt 3 has the ~me pitch ~ , ~s the internal screw thread 1~0 of the ~irst half 1 such th~, when the latter is ti~htened relative to the former, an axial ten~ and compression force is generated be~ween ~he threaded bolt 3 and the internal screw ~hread 1~0 o~ the first half 1. ~he force correspondingly cau~es ~he ~hreaded bolt 3 and the first half 1 to move in opposed directlons ~rom th~
o~jeots 90, thereby fastenlny the lat;te~. ~o~e that, sincq the head portion 11 of the l~irst halP 1 has a thickne~s whi~h is gr~ater than the ~han~ l~ and therefore possesses a greater strength, deformatiol1 of the thread withirl the ~hank 12 is more severe th~n th~t within the head portion 11. The dotted circle (A) suf~ers the greatest thread deformation while the dotte~ circle (C) suf~rs the leas~ ~hread deforma~ion.
The shank portion ~2 of the firs~ half l, beincJ weaker than thb head portion 11, is corr~pondingly compre~sed axially, whe~ein the shank portion 12contracts such that it pos~esses a length L2 which is shorter than the ~, . , length L1, ~s shown in FicJ. 1.
Refe~ring to Figur~ 4, the ~econd half 2 is tightened on ~he ex~ernal s~'rew thread 120 of the first hal~ e~ause ~he ~ir~t and second sections 210, 220 hava di~ering screw pi~ches, and since the screw pitch ~ the second section 220 is greater than the screw pitc~ of the firs1: seotion 210, a ~ull turn of tne s~cond half 2 ~auses t~e second section 220 ~ move a . "'"'' '"'' '''''". ' .,:' '.', full leng~h of its ~c~e~ pitch while the first section 210 moves a lenqth g~eater that its screw pit~h, thereby compressing the first sec~lon 210 of the ~econd half 2 ~arther ~oward ~he first half-l. Thus, the short 5hank 12 of the first half l is compressed axially by the rotation of the second half 2 ~elative to ~he shank 12 o~ the first half 1 su~h that the length of the shank 12 shorten~ to L3 which is shorter than the length L2 of the shank 12 bafore the second o half 2 is threaded thereon. Unde~ such a condi~ion, a resilient abu~ting engagement is generated bet~een the external s~rew thread 120 of ~he first half 1 and the second section ~20 of the second half 2 due to the thickness reduction at the shank 12. The portion in:
the dotted circle (c') suffers ~he most seve~e thread deformation while the portion in the dotted cir~e (A') suffers the le~st thread deformation. ~ote that the forces whi~h are generated by t~e firs~ and second halves 1, 2 after the fi~st half 1 has been threaded on the threaded bolt 3 and the ~econd halr 2 has been threaded on the shank 12 of the first half ~ are counter-balanced s~ch that they provide f irm engagement - between the ob j ects 90.
. Referring to ~ig . 5, note that the objects 90 are engaged stationarily after the first half 1 is tightened on the thre~ded bolt 3. Under this condition, the threaded bolt 3 causes a compression ~ ~ 21 329 ~ 3 force (P) on tlle o~e~ts ~0 which is countere~ by the force (Pl) gen~trateà bet~een the first half ~ and the ~hreaded ~ 3. When t}~e second half 2 i~ ti~htened relative to the sh~nk 12 of tl~e fir~;t half 1, an axial ~ompre~sion foroe (Ps) i~ produeed betwee.n the external gcrew thread 1~0 of the fir~t half 1 and the first :3ection 210 of ~he ~ec:ond h~l~ 2. ~hen the objects 90 are at a stativna~y position, the compression ~orce (P~) is equi~a~ent to th~ compression f~-ce (P1) which is produ~ed by th~ ~irst half 1~ In case ah external ~orce which is çlreater than (Ps) is appliecl on the fas~ened objecl~s 90, the force (P1) serv~s as a compensating force to prevent the fastenecl obje~t~ 0) ~rom 1~ing mavecl.
. .
lS Re~erri.ng to ~igure 6, in another preferred ~ .;
embodiment, ~he half nut has an external screw thread 520 for~ned on the short ~hank 52 and an i~ernal sorew .; .
thread 530 formed on an inner wall surf~e whicn ~on~ine~ an axial bore th~rethrough. The internal ; ~
sar~w th~ead ~3û has a constant half-b~eadth (T) which '. :-i9 greater ~han the differehce (S) be~ween t}le minor ~.'.
and greatest diameter~ d5, d~. In this embodiment, ~he ~.
greatest cliam~ter jd5 of the internal ~cr~w thread $30 is greater than the minor diamete~ d6 of the external ~5 scre~ thread 520. Tllus a thic};ness bet~Je~n the internal and external screw threads 520, 530 is aaaordingly redu~ed so the tips o~ the internal and ._ external screw threads 520, 530 closely overlap with - one another.
n ~se, the threaded bolt 7 is inserted through the - first half 5 and the second half :6 is th~eaded on-the latter such that an axial tensile and compression force is generated between the in~ernal screw thread 530 and the threaded bolt 7 ~t the positions (H) and (I). When the second half ~ i~ sleeved so as to be tightened on the shank 52 of the firs~ half ~, an abutting engagement is generated at the position ~G), an axial tensile and compression ~orce is generated at the position (K), while a ~esilien~ abuttiny engagement is . generated at the positions (~) between the external screw thread of ~he short shank 52 of the first half 5 and the internal screw threa~ of the f irst section 61 of the second half ~. Therefore, the engagement provided by the half nut 5 of the present invention is f irm.er than tha~ disclosed in the previously cited U. S. Patent.
As explained above, the i~proved ~tructure o~ the first ha-lf 1 o~ the nut me~be~ pro~ides a resilient abutting engagement in cooperation with the s~cond half 2 and the th~eaded bolt 3. Thus, the ob~ec~s 90fastened by the nut-and-bolt set which includes the hal~ nut 1 of the present invention is firmer when compared to the conventional nut and bolt set.
With the invention thus ex.plained, it is obvious ~ --~10----2132943 : :~
to t~ose s~.illed in the art th~t v~rious modific~tions and variations can be madR wit~lout departing from the ~;
scope and spirit thereof. It is therefore intended that this invention be limited only as indicat~d in the appended claim~
~ .,, .. : ~:
,. ~,,.
''''~'~':
~,,",,,~
!
'':
,' '~ ~, '' "',
Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
A half nut having a short shank with an external screw thread thereon and an inner wall defining an axial bore therethrough, the inner wall having an internal screw thread substantially concentric with the external screw thread and having a first screw pitch, the external screw thread being defined by substantially constant major and minor radii and having a second screw pitch different from the first screw pitch, the internal screw thread being defined by substantially constant greatest and shortest radii, characterized in that the internal screw thread has a constant half-breadth which is greater than the difference between said minor and greatest radii.
The half nut as defined in Claim 1, characterized in that the minor radius of the external screw thread is greater than the greatest radius of the internal screw thread.
The half nut as defined in Claim 1, characterized in that the greatest radius of the internal screw thread is greater than the minor radius of the external screw thread.
The half nut as defined in Claim 1, characterized in that the internal screw thread has a screw pitch which is greater than a screw pitch of the external screw thread.
Fixing means including a half nut according to any one of Claims 1 to 4, another half nut and a threaded bolt onto which the half nuts are screwed such as to cooperate with the bolt to fasten together adjacent articles.
A half nut having a short shank with an external screw thread thereon and an inner wall defining an axial bore therethrough, the inner wall having an internal screw thread substantially concentric with the external screw thread and having a first screw pitch, the external screw thread being defined by substantially constant major and minor radii and having a second screw pitch different from the first screw pitch, the internal screw thread being defined by substantially constant greatest and shortest radii, characterized in that the internal screw thread has a constant half-breadth which is greater than the difference between said minor and greatest radii.
The half nut as defined in Claim 1, characterized in that the minor radius of the external screw thread is greater than the greatest radius of the internal screw thread.
The half nut as defined in Claim 1, characterized in that the greatest radius of the internal screw thread is greater than the minor radius of the external screw thread.
The half nut as defined in Claim 1, characterized in that the internal screw thread has a screw pitch which is greater than a screw pitch of the external screw thread.
Fixing means including a half nut according to any one of Claims 1 to 4, another half nut and a threaded bolt onto which the half nuts are screwed such as to cooperate with the bolt to fasten together adjacent articles.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930020044A KR970007522B1 (en) | 1993-09-28 | 1993-09-28 | Method and device for the tension control of yarn winding bobbin |
| KR93-20044 | 1993-09-28 | ||
| DE19503962A DE19503962A1 (en) | 1993-09-28 | 1995-02-07 | Lock nut capable of engaging resiliently another nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2132943A1 CA2132943A1 (en) | 1995-03-29 |
| CA2132943C true CA2132943C (en) | 1998-11-10 |
Family
ID=26012205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002132943A Expired - Fee Related CA2132943C (en) | 1993-09-28 | 1994-09-26 | Half nut capable of engaging resiliently another half nut |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN1042168C (en) |
| AU (1) | AU671769B2 (en) |
| CA (1) | CA2132943C (en) |
| DE (1) | DE19503962A1 (en) |
| FR (1) | FR2710706B1 (en) |
| GB (1) | GB2282202B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9717859D0 (en) * | 1997-08-23 | 1998-04-08 | Gutt Andreas | Lock nuts |
| GB2417367A (en) * | 2004-08-19 | 2006-02-22 | Richard Henry Pearce | Electrical earthing nut |
| FR2891804B1 (en) * | 2005-10-12 | 2009-05-01 | Airbus France Sas | NARROW SYSTEM AND AIRCRAFT ENGINE HITTING MATERIAL COMPRISING SUCH A SYSTEM |
| MD54Z (en) * | 2007-04-28 | 2010-02-28 | Ион РАССОХИН | Process for manifacturing a threaded connection |
| MD20070123A (en) * | 2007-04-28 | 2008-12-31 | Ион РАССОХИН | Threaded connection and process for manufacturing thereof |
| GB201416618D0 (en) * | 2014-09-19 | 2014-11-05 | Toros Engineering | Connecting Apparatus Assembly And Method |
| CN104632852A (en) * | 2015-02-06 | 2015-05-20 | 洛阳理工学院 | High-strength nut |
| CN105114433A (en) * | 2015-07-13 | 2015-12-02 | 东西方航空科技发展(宁波)有限公司 | Locking nut piece |
| CN106015259B (en) * | 2016-07-08 | 2019-02-22 | 天津天海同步科技有限公司 | A kind of split type locking nut |
| EP3382215B1 (en) | 2017-03-28 | 2020-12-23 | Melnikov, Mikhail Borisovich | Method for tightening a thread joint |
| CN108799305A (en) * | 2017-04-26 | 2018-11-13 | 林志厚 | A kind of connection method of pairs of anti-loose nut bolt |
| FR3071569B1 (en) | 2017-09-26 | 2019-10-18 | Lisi Aerospace | NUT LOCKOUT DEVICE AND ASSEMBLY ASSEMBLY THEREFOR |
| FR3071570B1 (en) | 2017-09-26 | 2019-10-18 | Lisi Aerospace | NUT LOCKOUT DEVICE AND ASSEMBLY ASSEMBLY THEREFOR |
| FR3071568B1 (en) * | 2017-09-26 | 2019-10-18 | Lisi Aerospace | NUT LOCKOUT DEVICE AND ASSEMBLY ASSEMBLY THEREFOR |
| CN110145532A (en) * | 2019-05-23 | 2019-08-20 | 海盐亚圣五金制品有限公司 | A kind of locking combination nut |
| CN110345147B (en) * | 2019-07-16 | 2021-04-16 | 航天精工股份有限公司 | Effective anti-loosening combined nut |
| CN111120494A (en) * | 2020-01-19 | 2020-05-08 | 时元成 | Locknut structure with screw pitch difference |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE140031C (en) * | ||||
| GB191209274A (en) * | 1912-04-19 | 1913-04-17 | William Thomas Phillips | An Improved Nut Lock. |
| GB1027677A (en) * | 1963-02-26 | 1966-04-27 | Donald Henry Carter | Improvements in or relating to nut and bolt means |
| AU6094380A (en) * | 1979-08-01 | 1981-02-05 | Ajax Nettlefolds Ltd. | Slit nut |
| JPS608519A (en) * | 1983-06-27 | 1985-01-17 | 小松 実 | Double nut for preventing loosening |
| NO159616C (en) * | 1985-06-19 | 1989-01-18 | Harald Kolvereid | L SMUTTER. |
| AU589039B2 (en) * | 1986-07-31 | 1989-09-28 | Patrick Yelverton Williams | Self-locking nut |
| US5248232A (en) * | 1992-02-10 | 1993-09-28 | Chiang Chih Chung | Fixing means |
-
1994
- 1994-09-24 CN CN94116489.6A patent/CN1042168C/en not_active Expired - Fee Related
- 1994-09-26 CA CA002132943A patent/CA2132943C/en not_active Expired - Fee Related
- 1994-09-26 AU AU74218/94A patent/AU671769B2/en not_active Ceased
- 1994-09-27 FR FR9411493A patent/FR2710706B1/en not_active Expired - Fee Related
- 1994-09-27 GB GB9419444A patent/GB2282202B/en not_active Expired - Fee Related
-
1995
- 1995-02-07 DE DE19503962A patent/DE19503962A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU7421894A (en) | 1995-05-04 |
| AU671769B2 (en) | 1996-09-05 |
| GB9419444D0 (en) | 1994-11-09 |
| GB2282202B (en) | 1996-09-04 |
| GB2282202A (en) | 1995-03-29 |
| DE19503962A1 (en) | 1996-08-14 |
| CA2132943A1 (en) | 1995-03-29 |
| FR2710706A1 (en) | 1995-04-07 |
| CN1042168C (en) | 1999-02-17 |
| FR2710706B1 (en) | 1996-04-12 |
| CN1108360A (en) | 1995-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |