I. Cov kev ua haujlwm tseem ceeb thiab qhov sib txawv hauv cov hom kis tau
Helical racks: Lawv lub luag haujlwm yog hloov kho cov lus taw kev sib tw rau hauv cov lus tshem tawm tab sis lawv yuav tsum tau siv nrog cov txiaj ntsig helical. Thaum lub helical iav tig nws cov hniav mesh nrog cov ntawm cov helical khib kom thawb txoj kev heltearly (lossis cov kab kev txav ntawm cov helical iav kom tig). Qhov no yog "iav {{- khib cov qauv uas muaj hluav taws xob sib kis ntawm cov hniav.
Pob Screws: Lawv lub luag haujlwm tseem ceeb los hloov cov lus tsa suab rau hauv cov lus tsa suab tab sis lawv cia siab rau tus qauv "}} bough" Rolling kev txhuam cov qauv kom ua tiav qhov no. Thaum lub hau ntswj tig rau hauv cov txiv ntoo yob raws cov ntsia hlau kom tsav cov ntsia hlau kom txav linearly thaum lub txiv ntoo yog tsau). Qhov no yog "helical khub + dov caij" kis tus qauv uas muaj hluav taws xob uas muaj cov hniav tsis muaj hniav.
Ii. Cov qauv tsim qauv thiab kev teeb tsa sib txawv
Helical racks: Lawv yog cov hlua ntev - zoo li tus txhuam hniav (nrog rau cov hniav uas tsis muaj zog feem ntau 15 degree} 30} Thaum lub sij hawm teeb tsa qhov chaw nyob deb ntawm cov khib thiab cov kev sib piv ntawm cov iav iav yuav tsum tau ua raws. Ib qho khib ib zaug muaj qhov ntev ntev yog li ntev - stroke kis tau sib xyaw ua ke thiab lub spricting sib koom tes kom tsis txhob muaj kev hloov pauv kev hloov pauv kev kis kom tsis txhob kis tus mob. Ib qho ntxiv helical racks tsis muaj cov qauv kev coj ua thiab xav tau cov ntawv qhia dua linear ntxiv (xws li cov kab slider) kom ntseeg tau cov lus tawm suab.
Pob Screws: Lawv muaj cov ntsia hlau ncej (nrog helical grooves) ib tug txiv ntoo (nrog ua {{} hauv pob ntawm lub pob zeb) thiab cov hmoov av}}} lub tes tsho "qauv. Thaum lub sij hawm cov pob khoom nruab tau siv los kho ob qho kawg ntawm cov ntsia hlau (lossis ib qho kawg yog tsau thiab lwm qhov yog kev txhawb nqa ncaj qha (qee qhov xwm txheej tseem siv kev coj ua nruj). Ib lub pob ntsia hlau nkaus xwb tuaj yeem ua tiav cov kab mob ntev (nce mus rau ntau metric) tsis muaj kev sib cais thiab yooj yim dua rau kev tswj hwm ntawm ob qho kawg).
III. Qhov sib txawv hauv kev xa cov yam ntxwv
1. Kev sib kis raug thiab rov ua yuam kev
Helical racks：Transmission accuracy is affected by tooth surface machining accuracy (such as pitch error and tooth profile error) rack splicing accuracy and gear meshing clearance. The pitch error of ordinary precision helical racks is about 0.1-0.3 mm/m and high-precision helical racks (such as ground racks) can reduce the error to 0.02-0.05 mm/m. However due to the inevitable side gap between gear and rack meshing the return error is relatively large (usually >0.1 hli) ua rau nws nyuaj ua kom tiav siab- precision muab hauv kev xa rov qab.
Pob Screws: Cov khoom sib kis tau raug txiav txim siab los ntawm cov cim xws li cov thawj coj ua yuam kev thiab kev khiav tawm runout (saib mus rau yav dhau los cov qhab nia raug). Siab - precision pob screws (xws li C3 qib) muaj kev sib luag ntawm cov txiv ntoo (xws li ob npaug {} txiv ntseej ua ntej {{zawm). Kev xa rov qab yuam kev tsawg heev (feem ntau<0.01mm) and the reverse positioning accuracy is far better than that of helical racks making them suitable for precision scenarios requiring frequent forward and reverse transmission.
2. Thauj muaj peev xwm thiab nruj
Helical racks: Thauj muaj peev xwm nyob ntawm thaj chaw sib tiv toj thiab cov khoom siv zog. Tus qauv siv kaus hniav muaj qhov chaw tiv tauj loj dua ncaj qha- Tus hniav racks li no (ntau pua lub iav maeces tuaj yeem kis tau kis radial thauj khoom muaj peev xwm kis tau sparial thauj khoom muaj peev xwm kis tau sparial canp radial rog). Txawm li cas los xij tag nrho cov rigidity yog kev cuam tshuam loj heev los ntawm cov duab khib nyiab (xws li cov ncej stiffness) thiab lub hauv paus dos tau yooj yim ua rau cov hniav tsis zoo.
Pob Screws: Thauj muaj peev xwm yog txiav txim siab los ntawm cov naj npawb ntawm cov pob ntsia hlau txoj kab uas hla thiab cov txiv ntoo qauv. Thauj khoom tuaj yeem nce ntxiv los ntawm kev nce ntsia hlau txoj kab uas ua rau nws haum rau ntau pua ntawm ntau pua ntawm cov tshiab ntawm cov tshuab tshiab). Txawm li cas los xij lawv lub peev xwm radial thauj khoom yog tsis muaj zog (radial rigidity (radial thauj khoom tuaj yeem yooj yim rau cov ntsia hlau kom yooj yim rau cov ntsia hlau yuav tsum zam.
3. Ceev thiab Ua Haujlwm
Helical racks: Kis Ceev yog txwv los ntawm cov iav ceev thiab khib module. Cov kab mob loj dua thiab lub zog loj dua tuaj yeem txav nrawm dua li ntawm cov hniav ncaj Cov hniav cov hniav kub ua kom sov tau yooj yim thaum lub sijhawm ua haujlwm siab xav tau siv lubrication lubrication kom txo kev hnav.
Pob Screws: Kis tau cov kev sib raug zoo ntawm lub yob sib txhuam ntawm cov npas uas muaj kev sib tw me me ntawm 90%}}}}}}}}} Lawv tsim kom muaj cua sov tsawg thaum lub siab - kev ua haujlwm nrawm thiab tuaj yeem hloov kho kom nrawm dua (xws li ntau txhiab tus revolutions ib feeb). Thaum sib phim nrog siab - precision bearings lawv tuaj yeem ua tiav cov lus nrawm nrawm (xws li ntau metres ib ob). Txawm li cas los thaum lub sijhawm ua haujlwm siab ua haujlwm yuav tsum tau them rau qhov ruaj ntseg ntawm lub pob ncig kom tiv thaiv cov pob los ntawm derailing.