Dab tsi yog Flat Torsion Spring?
Koj xav tau lub zog tig tab sis muaj qhov chaw axial tsawg heev. Ib tug qauv, bulky round-wire torsion spring simply won't fit, yuam kom rov tsim dua tshiab ntawm koj cov khoom compact.
Lub caij nplooj ntoos hlav tiaj tus torsion yog txhua lub caij nplooj ntoos hlav ua los ntawm cov khoom siv tiaj tus, zoo li lub caij nplooj ntoos hlav steel, uas khaws cia thiab tso tawm lub zog tig. Nws qhov profile slim ua rau nws zoo tagnrho rau cov ntawv thov nrog qhov chaw nruj.
Thaum ib tug engineer xa kuv ib daim duab rau "flat torsion spring," kuv thawj lo lus nug yog ib txwm, "Yuav ua li cas raws nraim nws yuav tsum ua?" Lub sij hawm yog ib qeb dav dav, tsis yog ib feem. It's like asking for a "car" when you need to specify if it's a truck, ib sedan, los yog lub tsheb kis las. Xaiv qhov tseeb ntawm lub caij nplooj ntoos hlav tiaj tiaj yog ib qho kev txiav txim siab tseem ceeb tshaj plaws kom ntseeg tau tias koj lub tshuab ua haujlwm tau zoo thiab ntseeg tau rau nws lub neej kev pabcuam tag nrho..
Yog Kauv Torsion Caij Nplooj Hlav Zoo ib yam li lub Caij Nplooj Ntoos Hlav Torsion?
You're looking for a simple return spring, tab sis cov terminology tsis meej pem. Koj pom sib txawv coiled ca springs thiab xav tias lawv txhua tus ua haujlwm ib yam, uas tuaj yeem ua rau xaj qhov tsis ncaj ncees lawm.
A kauv torsion caij nplooj ntoos hlav[^ 1] yog ib qho tshwj xeeb hom ntawm tiaj tus torsion caij nplooj ntoos hlav[^2]. It's designed with open coils that do not touch and is best suited for low-rotation applications, feem ntau tsawg dua 360 qib.
Kuv nco qab ua hauj lwm nrog ib lub tuam txhab uas tab tom tsim lub siab-kawg tswj qhov rooj rau cov khoom siv suab. Lawv xav tau ib tug du, tactile "rov-rau-center" xav. Lawv pib sim lub caij nplooj ntoos hlav fais fab me me, tab sis nws muab kev sib hloov ntau dhau thiab xav tias tsis sib xws. Kev daws yog qhov tseeb kauv torsion caij nplooj ntoos hlav. Peb tsim ib qho uas tsuas yog muab tus nqi ntawm torque tshaj 45-degree kev sib hloov. Qhov sib txawv ntawm cov coils kom ntseeg tau tias tsis muaj kev sib txhuam, muab lub pob qhov nyiaj ntawd, dej motion lawv tab tom nrhiav.
Txhais cov yam ntxwv
Tus yuam sij rau kauv torsion caij nplooj ntoos hlav yog nyob rau hauv nws yooj yim, qhib-coil tsim. Nws zoo nkauj thiab siv tau rau cov haujlwm tshwj xeeb.
- Kev tsim kho: It's made from a single strip of rectangular spring steel coiled on one plane. Ib qho kawg feem ntau yog khoov los ua ib qho kev thauj tog rau nkoj sab hauv (txuas mus rau ib tug ncej), thiab lwm qhov kawg yog tsim los thawb tawm tsam qhov rotating.
- Rooj mov: Raws li cov khoom rotates, nws cua lub caij nplooj ntoos hlav tighter, khoov cov khoom. The material's resistance to this bending creates the restoring torque. Vim cov coils tsis tsim los kov, lub torque teb yog heev linear thiab du rau me me deflections. Nws tsis yog tsim rau cov ntawv thov uas xav tau ntau qhov lem.
| Feature | Spiral Torsion Caij nplooj ntoos hlav (Flat Hlau) | Helical Torsion Caij nplooj ntoos hlav (Round Hlau) |
|---|---|---|
| Profile | Heev nyias axial profile, dav dua. | Txoj kab uas hla dua, ntau ntev axial profile. |
| Qhov chaw siv | Zoo tagnrho rau qhov chaw vertically nruj. | Zoo tagnrho rau qhov chaw nruj radially. |
| Hom kev sib hloov | Tsawg dua 360 qib. | Muaj peev xwm tsim tau rau ntau qhov kev sib hloov. |
| Thawj Qhov Ua Haujlwm | Uncoiling muab kev txhawb zog. | Winding los yog unwinding muab lub zog. |
Thaum Lub Caij Nplooj Hlav (moos Caij nplooj ntoos hlav) Txoj Kev Xaiv Zoo?
Koj cov khoom yuav tsum tau thim ib txoj hlua ntev los yog siv, uas yuav tsum tau muaj ntau rotations. Ib qho yooj yim kauv caij nplooj ntoos hlav yuav khi thiab poob yuav luag tam sim ntawd.
Lub zog caij nplooj ntoos hlav, kuj hu ua lub caij nplooj ntoos hlav, yog qhov kev xaiv raug rau siab-tso retraction. Hom no tiaj tus torsion caij nplooj ntoos hlav[^2] yog pre-stressed thiab muaj nyob rau hauv ib lub tsev, tso cai rau nws xa cov torque zoo ib yam dhau ntau qhov kev sib hloov.
Ib qho ntawm peb cov neeg siv khoom loj tshaj plaws tsim cov khoom lag luam, suav nrog retractable cua hoses rau kev cob qhia. Cov springs nyob rau hauv cov reels no yog cov khoom tseem ceeb. Lawv yuav tsum rub rov qab 50 taw ntawm hnyav hose smoothly thiab ntseeg tau ntau txhiab zaus. Nov yog daim ntawv thov classic rau a lub zog caij nplooj ntoos hlav[^3]. Lub caij nplooj ntoos hlav yog nruj nreem kaw rau hauv ib lub nruas. Raws li koj rub lub hose, lub caij nplooj ntoos hlav tau nruj. Thaum koj tso nws, lub zog khaws cia rub lub hose rov qab rau hauv. A simple spiral spring couldn't store enough energy or provide enough turns to do that job.
Qhov tseem ceeb ntawm lub tsev
Tsis zoo li ib qho yooj yim kauv caij nplooj ntoos hlav, a lub zog caij nplooj ntoos hlav[^3] yog ib qho kev ua tiav uas tso siab rau nws lub tsev kom ua haujlwm kom raug.
- Zog Cia: A lub zog caij nplooj ntoos hlav[^3] yog tsim los ntawm ib tug ntev strip ntawm cov khoom uas yog pre-tsim rau hauv ib tug nruj coil. Tom qab ntawd nws tau muab tso rau hauv ib lub vaj tsev lossis rooj plaub uas loj me ntsis ntawm nws txoj kab uas hla dawb. Cov txheej txheem no "pre-loads" lub caij nplooj ntoos hlav nrog lub zog.
- Kev sib txhuam thiab tswj: Raws li lub caij nplooj ntoos hlav ua haujlwm, cov coils nias rau ib leeg thiab sab hauv ntawm lub tsev. Kev tswj kev sib txhuam no yog ib feem ntawm kev tsim thiab pab tsim kom muaj kev sib haum xeeb, zoo sib xws torque nkhaus piv rau lub caij nplooj ntoos hlav kauv. Qhov no yog vim li cas koj thiaj li tau txais kev rub tsis tu ncua los ntawm daim kab xev ntsuas es tsis txhob siv lub zog uas poob sai sai.
| Yam ntxwv | Lub zog caij nplooj ntoos hlav | Spiral Torsion Caij nplooj ntoos hlav |
|---|---|---|
| Coil State | Coils yog nruj nreem ntim thiab kov. | Coils qhib nrog qhov sib txawv ntawm lawv. |
| Tsev | Yuav tsum muaj rooj plaub lossis tsev nyob. | Feem ntau siv tsis muaj vaj tse tag nrho. |
| Rotational Capacity | Tsim los rau ntau qhov kev sib hloov tag nrho. | Txwv rau ob peb rotations, feem ntau tsawg dua ib. |
| Siv dav | Kev thim rov qab (daim kab xev ntsuas, rooj zaum). | Yooj yim rov-rau-qhov chaw (hloov, levers). |
Koj tuaj yeem siv lub tiaj tiaj tiaj tiaj ua lub caij nplooj ntoos hlav torsion?
Koj xav tau ib qho yooj yim heev, tsis tshua muaj nqi caij nplooj ntoos hlav rau ib qho yooj yim pob khawm los yog latch mechanism. Lub caij nplooj ntoos hlav coiled zoo li overkill, and you're wondering if there's a simpler way.
Yog lawm, lub tiaj torsion bar yog daim ntawv yooj yim tshaj plaws ntawm lub caij nplooj ntoos hlav tiaj tus torsion. It's a straight strip of spring material that provides a restoring torque when twisted, ua kom nws zoo meej rau qhov yooj yim, low-rotation applications.
Ib zaug kuv tau ua haujlwm rau ib qhov project rau cov chaw tsim khoom siv ua liaj ua teb. Lawv xav tau ib lub caij nplooj ntoos hlav rau lub kaw mechanism ntawm lub noob hopper hau. Nws yog ib qho hnyav, qias neeg ib puag ncig, thiab lub mechanism yuav tsum tau foolproof thiab pheej yig. We didn't use a coiled spring at all. Peb tsim ib qho luv luv, ncaj daim ntawm hardened flat spring steel. Ib qho kawg tau welded rau pob khawm, thiab lwm tus so tawm ntawm lub hau. Thaum koj qhib lub hau, nws twisted lub bar. Thaum koj tso tseg, lub bar untwisted thiab snapped lub hau kaw. Nws yog incredibly yooj yim, nqi yuav luag tsis muaj dab tsi ua, thiab nws yuav zaum outlast tus so ntawm lub tshuab.
Simplicity hauv Design
Qee lub sij hawm qhov kev daws teeb meem zoo tshaj plaws yog qhov uas muaj qhov tsawg tshaj plaws. Lub tiaj torsion bar yog ib qho piv txwv zoo meej ntawm txoj cai no.
- Nws ua haujlwm li cas: Lub torsion bar ua haujlwm los ntawm kev tiv thaiv torsional (sib ntswg) rog raws nws qhov ntev. Tsis zoo li coiled springs uas khaws lub zog los ntawm kev khoov cov khoom, a torsion bar[^4] khaws lub zog los ntawm kev sib tw. Tus nqi ntawm torque nws muab yog txiav txim los ntawm nws qhov ntev, tuab, dav, and the material it's made from.
- Cov Ntawv Thov: Qhov kev tsim no yog qhov zoo tshaj plaws rau lub kaum sab xis, cov ntawv thov kev ntseeg siab uas tsis muaj qhov chaw rau lub kauj. It's often found in vehicle suspensions, ruaj latches, cuab yeej roj teeb clips, thiab yooj yim pob khawm counterbalances. Nws lub ntsiab kom zoo dua yog nws cov durability thiab tsis tshua muaj nqi.
| Feature | Flat Torsion Bar | Coiled Flat Springs |
|---|---|---|
| Form Factor | Ncaj, duab plaub. | Coiled, kauv puab. |
| Zog Cia | Tsawg rau nruab nrab. | Siab (Lub zog caij nplooj ntoos hlav) mus rau nruab nrab (Kauv). |
| Lub kaum sab xis | Tsawg heev, feem ntau tsawg dua 90 qib. | Muaj peev xwm siab heev (Lub zog caij nplooj ntoos hlav). |
| Nqi | Tsawg heev. | Nruab nrab mus rau siab, nyob ntawm complexity. |
Tag
"Npaj torsion caij nplooj ntoos hlav" piav txog tsev neeg txoj kev daws teeb meem. Xaiv qhov yog-txawm yog lub caij nplooj ntoos hlav kauv, a lub zog caij nplooj ntoos hlav[^3], los yog ib qho yooj yim torsion bar[^4]—is critical for your design's performance and success.
[^ 1]: Kawm txog kauv torsion springs thiab lawv cov qauv tsim tshwj xeeb uas ua rau lawv haum rau cov ntawv thov tshwj xeeb.
[^2]: Tshawb nrhiav cov peev txheej no kom nkag siab txog ntau yam thiab kev siv ntawm lub tiaj tus torsion springs hauv ntau yam qauv.
[^3]: Tshawb nrhiav kev ua haujlwm ntawm lub zog hluav taws xob thiab lawv qhov tseem ceeb hauv cov ntawv thov kev sib hloov siab.
[^4]: Nrhiav seb yuav ua li cas torsion tuav ua haujlwm thiab lawv cov ntawv thov hauv ntau lub tshuab tshuab.