CN85100376A - Transmission of mixed few-differential involute planetary and design - Google Patents

Abstract

The transmission of mixed few-differential involute planetary belongs to the involute planet gear transmission field with design, its velocity ratio by two pairs or more internal gear pair adopt respectively that the different numbers of teeth is poor, modulus, throw of eccentric mix and form, and with a kind of velocity ratio multiple combination arranged.

That the present invention designs is easy, gear range is wide and intensive, meshing efficiency is high, the rotary arm bearing life-span is long, stable drive, formulated 1: 10～1: 2000 velocity ratio series commonly used by the R40 preferred numbers, comprise 1352 velocity ratio combinations, and has an optional velocity ratio, corresponding output torque is 3～5000 kilogram-metres, is applicable to the deceleration and the speed change transmission of each industrial department.

Description

The invention belongs to the involute planet gear transmission.

The involute planetary gear transmission is a kind of interior engagement driving, with a kind of velocity ratio, adopts poor, a kind of modulus of a kind of number of teeth, a kind of throw of eccentric.For fear of various interference, adopt modified gear, calculation of complex, working pressure angle is big, the rotary arm bearing radial load is big, most structural types need careful balance, otherwise easily produce vibrations, be not easy to carry out design of velocity ratio tandem product and production, and only limit to gearing down by preferred numbers.

The purpose of this invention is to provide a kind of design easy, rational in infrastructure, that gear range is wide and intensive, meshing efficiency is high transmission of mixed few-differential involute planetary and design, to be widely used in each industrial department.

One-level transmission of the present invention adopts the different numbers of teeth poor by gear engagement pair in two pairs.Different moduluses and throw of eccentric are mixed and are formed, and with a kind of velocity ratio multiple compound mode are arranged, and transmission principle is seen Fig. 1 and Fig. 2.Internal gear Z ₄Fixing, motion is from eccentric shaft 5 inputs, planetary pinion Z

And Z ₄Engagement also produces revolution and spinning motion, by connecting link 6 spinning motion is passed to planet wheel Z ₂, Z ₂At Z ₃Under the eccentric shaft acting in conjunction, produce rotation and revolution, Z

With internal gear Z

Engagement, Z ₁Form integral body with output shaft 10, thus the output that rotatablely moves after will slowing down.

m ₁₂, m ₂₄Expression Z ₁And Z

And Z ₃And Z ₄Modulus;

a ₁₃, a ₃₄Expression Z ₁And Z ₂And Z ₃And Z ₄Throw of eccentric.

Generally speaking, m ₁₂≦ m ₃₄, Z ₁-Z

≧ Z ₄-Z ₃, a ₁₂≧ a ₃₄

Z ₂And Z ₃Middle interlink link, Fig. 1 represents that Fig. 2 represents to use the star-wheel crank throw with drive plate 6.

When the eccentric shaft input speed is very low, also can be designed to one-way eccentric mixed few-differential Gear Planet Transmission.

Speed change transmission principle of the present invention is seen Fig. 3.By Z ₁, Z ₂, Z _3-1, Z _4-1Form a velocity ratio i ₁, by Z ₁, Z ₂, Z ₃, Z ₄Form another velocity ratio i ₂, i ₁/ i ₃The ratio size is decided by technical requirements.Fixing Z _4-1, make Z ₄Idle running obtains i ₁; Fixing Z ₄, make Z _4-1Idle running just obtains i ₂Connecting link between planetary pinion is the same.

Velocity ratio of the present invention should carry out Combined Cycle and calculate, and selects employing from a large amount of velocity ratio combinations.

Gear ratio sets adds up to formula to be: $\mathrm{\sum i=}\underset{\mathrm{X\; =a}}{\overset{\mathrm{X=b}}{\mathrm{\Σ}}}\frac{z_1{\mathrm{(z}}_4\mathrm{-x)}}{z_1{\mathrm{(z}}_4{\mathrm{-x)-z}}_2{z}_4}$

X represents that the number of teeth is poor in the formula, (a, b) expression number of teeth difference scope, selected tooth number Z ₁, Z ₄, Z ₃And a, the b excursion is carried out cycle calculations by following formula, just obtains great number of driving than combination.With a kind of velocity ratio multiple compound mode is arranged, should be under the prerequisite of physical dimension and strength of gear teeth conditions permit, select that working pressure angle is little, the number of teeth is many, input shaft is identical with the output shaft sense of rotation, the secondary easily velocity ratio combination that balance and meshing efficiency are high mutually of planetary pinion.

The EQUILIBRIUM CALCULATION FOR PROCESS method that the present invention is used for gearing down is:

∑ Mi ₂₁, ∑ Mi ₃₄Be respectively planet wheel Z ₂And rotary arm bearing, total weight and the planet wheel Z of eccentric Cylinder ₃And rotary arm bearing, the total weight of eccentric Cylinder, for stable drive, require ∑ Mi ₂₁A ₁₂=∑ Mi ₃₄A ₃₄

The EQUILIBRIUM CALCULATION FOR PROCESS method that the present invention is used for the speed change transmission is:

∑ Mi ₂₁Be planet wheel Z ₃And rotary arm bearing, eccentric Cylinder weight sum;

∑ Mi ₃Be planet wheel Z ₃, Z _3-1And rotary arm bearing, eccentric Cylinder weight sum;

For stable drive, require ∑ Mi ₂₁A ₁₂=∑ Mi ₃A ₃₄

The physical dimension of planet wheel set does not satisfy balance and requires then to select again the velocity ratio combination, or changes module.The design series product except that balance requires, also should guarantee planetary gear structure size and velocity ratio series common processes device with support.

1: 10～1: 2000 the nominal velocity ratio series that the present invention presses the design of R40 preferred numbers all adopts 5～8 tooth difference standard garden stud wheel combinations, as be used for retarder and speed changer series, the product center height is 60,80,100,140,150,160,200,220,250,290,325,420, the 540(millimeter), export torque accordingly and be 3,5,15,30,60,120,225,300,600,1000,1500,2500, the 5000(kilogram-metre).Velocity ratio series comprises 104 nominal velocity ratios and 1352 velocity ratio combinations, in addition, also has 1: 10～1: 4,000,000 optional velocity ratio can extensively be used the gearing down of industrial departments such as machinery, national defence, mine, metallurgy, chemical industry, weaving, lifting transportation, construction engineering, food industry, package packing machine and the occasion of speed change transmission.

Advantage of the present invention is:

(1), velocity ratio can all adopt the combination of standard garden stud wheel, than common involute one differential teeth planetary transmission, the rotary arm bearing load reduces 2.5 times, has prolonged bearing life; Saved complicated calculation of Corrected Gearing, simple in structure, volume is little, in light weight, design, manufacturing, installation, easy to use.

(2), be convenient to from the combination of a large amount of velocity ratio, to select meshing efficiency height, velocity ratio combination rational in infrastructure, meshing efficiency improves 5～17%, double stage tandem, mechanical efficiency can reach 80%.

(3), the mutual balance of planetary pinion parafacies, stable drive, noise is little, input speed is below 1800 rev/mins, load noise is between 58～80 decibels.

(4), the velocity ratio series of same type, gear structure size basically identical, part generalization degree reaches 83～92% in addition; More convenient employing rated load is big and rotary arm bearing that physical dimension is identical and adopt big gear and the pin shaft structure size of transmitting torque, thereby bearing capacity is big.

(5), can be advantageously used in the speed change transmission.

By the N2X of the present invention design, G25 type mixed few-differential Gear Planet Transmission speed changer is used in 6.5 and steams on the boiler and old product ratio with purposes, and weight reduces 65%, and volume reduces 60%, and power consumption reduces 10～20%, 68 decibels of noises.

The YHDG22 type mixed less tooth difference planetary reducer of the present invention design, nominal torque 250 kilogram-metres, overload capacity is more than 1.6 times, 55 decibels of load noises, two-stage series connection, velocity ratio 1: 1020, mechanical efficiency 80.8%.

Claims (5)

1, a kind of involute planetary gear transmission and design method, it is characterized by mixed few-differential Gear Planet Transmission and design, pay poor, the different modulus of the different number of teeth of employing by two pairs or more inside engaged gear and form gearing down or speed change transmission with different throw of eccentric mixing, with a kind of velocity ratio multiple combination is arranged, its general-purpose computations formula is:

$\mathrm{\sum i=}\underset{\mathrm{X\; =a}}{\overset{\mathrm{X=b}}{\mathrm{\Σ}}}\frac{z_1{\mathrm{(z}}_4\mathrm{-x)}}{z_1{\mathrm{(z}}_4{\mathrm{-x)-z}}_2{z}_4}$

2, claim 1 described mixed few-differential involute planetary transmission and design is characterized by and adopt force transmiting disk or star-wheel crank throw to connect between the planetary pinion.

3, claim 1 described mixed few-differential involute planetary transmission and design, it is characterized by gear ratio sets adds up to calculation to obtain great number of driving than after making up, should fill under the prerequisite of being permitted at physical dimension and gear teeth strength condition, select that working pressure angle is little, the number of teeth is many, input shaft and output shaft rotates in the same way, planet wheel is paid mutual balance and meshing efficiency is high velocity ratio make up.

4, planet wheel according to claim 3 is paid mutual balance, it is characterized by the seasonal ∑ Mi of design ₃₁, ∑ Mi ₃₄Be respectively planet wheel Z ₂And rotary arm bearing, total weight and the planet wheel Z of eccentric Cylinder ₃And rotary arm bearing, the total weight of eccentric Cylinder, then require ∑ Mi ₂₁A ₁₂=∑ Mi ₃₄A ₃₄

5, mixed few-differential involute planetary according to claim 1 transmission and design, it is characterized by 1: 10～1: 2000 nominal velocity ratio series by the design of R40 preferred numbers, can all adopt standard garden stud wheel, as be used for retarder and speed changer series, the product center height is 60,80,100,140,150,160,200,220,250,290,325,420, the 540(millimeter), corresponding output torque is 3,5,15,30,60,120,225,300,600,1000,1500,2500, the 5000(kilogram-metre), velocity ratio series comprises 104 nominal velocity ratios and 1352 velocity ratio combinations, also has 1: 10～1: 4 in addition, 000,000 optional velocity ratio.

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