Tishlar soni Z
Spiral konusli tishli
Spiral konusli tishli
Yopiq vites qutisi odatda yuqori tezlikka ega. Transmissiyaning barqarorligini yaxshilash va zarba va tebranishlarni kamaytirish uchun ko'proq tishlarga ega bo'lish yaxshiroqdir. Pinion tishlari soni z1=2040 bo'lishi mumkin. Ochiq (yarim{1}}ochiq) tishli uzatmalar qutisi, chunki tishli tishlar asosan eskirganligi sababli, tishli uzatmalar juda kichik bo‘lib qolmasligi uchun, tishli vites uchun juda ko‘p tish ishlatilmasligi kerak, odatda z{{2} }.
Spiral burchak
β>0 chap-qo‘lda;
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Tish balandligi
pn=ptcos (n va t pastki yozuvlari mos ravishda normal yoʻnalish va oxirgi yuz belgilarini ifodalaydi)
Modul
The modulus refers to the ratio of the pitch p between the two adjacent teeth on the same side tooth profile to the circumference ratio π (m=p/π), in millimeters. Modulus is one of the most basic parameters of modulus gear teeth. The modulus of straight, helical and conical gears can all refer to the standard modulus series table (GB/T 1357-1987).
mn=mtcos
m=p/ π
The index circle of the gear is the basis for designing and calculating the size of each part of the gear, and the circumference of the index circle of the gear=πd=z p
Modul m tishli o'lchamini aniqlaydigan asosiy parametrdir. Tishlar soni bir xil bo'lgan vites kattaroq modulga ega va uning o'lchami ham kattaroqdir.
bosim burchagi
rb=rcos =1/2mzcos
At the tangent point P of the pitch circles of the two gears, the acute angle between the common normal line of the two tooth profile curves (ie the force direction of the tooth profile) and the common tangent line of the two pitch circles (ie the instantaneous direction of motion at point P) is called The pressure angle is also called the engagement angle. For a single gear, it is the tooth profile angle. The pressure angle of a standard gear is generally 20". In some occasions, =14.5 degree , 15 degree , 22.50 degree , and 25 degree are also used.
Indeks doirasining diametri
d=mz
Markaz masofasi
a=1/2m(z1 plus z2)
To'g'ri ulanish shartlari
m1=m2, 1= 2, 1= 2
In order to prevent the gear from undercutting, for the standard straight-edge cylindrical gear with =20o, z1 Greater than or equal to 17 should be taken. Z2=u·z1.
Qo'shimcha balandlik koeffitsienti va boshni tozalash koeffitsienti
—Ha, C
Ikki tishli g'ildirak to'rlangan bo'lsa, bir vitesning tish uchi har doim ikkinchi vitesning tish ildiziga kiradi. Termik kengayishning oldini olish va moylash uchun joy bo'lishi uchun tish ildizining balandligi tish uchining balandligidan kattaroq bo'lishi kerak. Shu sababli, qo'shimcha balandlik koeffitsienti va boshni tozalash koeffitsienti kiritiladi.
Oddiy tish: ha =1; C=0.25 Qisqa tish: ha =0.8; C=0.3
