CN101968100A - Special planetary reduction gear for roller table - Google Patents

Abstract

The invention relates to the technical field of reducers of steel works and discloses a special planetary reduction gear for a roller table. The special planetary reduction gear is characterized by consisting of a bevel gear pair and improved quasi planetary transmission, wherein (a) the high-speed step bevel gear pair consists of a driving bevel gear A and a driven bevel gear B; (b) the quasi planet improved on low speed level consists of a sun gear, a planet carrier, uniformly-distributed planetary wheels, an inner gear ring and a bearing; two shunt gears which have the same tooth number Z and the same modulus m and are symmetrically arranged on two sides are arranged among the planetary wheels and the inner gear ring; and a planetary wheel shaft and a shunt gear shaft are fixed on the planet carrier. The invention has the benefits that: (a) compared with the only four planetary wheels (because of basic member floating, so that the number of the planetary wheels is three) in the background art, the carrying capacity of the improved quasi planetary gear is improved by 40-45 percent; (b) the invention has simple two-stage reduction, short axial size and light weight and is convenient to maintain; and (c) the price of the traditional cycloidal gear reducer is less than a half of the price of a planetary gear unit (NGW) planetary reduction gear.

Description

Planetary speed reducer specially for roller way

[technical field]

The present invention relates to steel mill's retarder technical field, a kind of planetary speed reducer specially for roller way.

[background technique]

Invention " planetary speed reducer specially for roller way " is awl tooth+secondary NGW planetary structure (ZL200710068045.2), and because of following improvement is patented: (1) velocity ratio is reasonably combined; (2) sun gear hollow design at different levels, purpose weight reduction make the sensitivity of floating; (3) complete machine has only two kinds of specification bearings; (4) fill roller bearing in the planet wheel.The subject matter of this invention is:

(A) to float and to only depend on " hollow design " be to be difficult to guarantee " planet wheel all carries " to sun gear, in theory, realizes that the principal element that planet wheel all carries also has: 1. sun gear accuracy of manufacturing; 2. (internal tooth casing connects) toothed coupling maximum deflection angle＜0.5 °; 3. planet wheel shaft is adjacent apart from deviation; 4. planet wheel center circle positional deviation; 5. the accuracy of manufacturing of planet wheel.

(8) slow speed turbine stage is because the basic building block floating load balancing device that adopts sun gear to float, and the theoretical monumental works of many Machine Designs think that all planet wheel can only have three in the Gear Planet Transmission:

(1) " the gear handbook (on) 7-10: in the design, get n usually _p=3, simple and reliable because this stress helps floating load balancing mechanism;

(2) Wang Wenbin " mechanical design handbook " volume 3.17-36 page or leaf: in the statically determinate system, because the basic building block floating load balancing mechanism has principal mode simple in structure, that the good advantage of effect of load balancing mechanism becomes load balancing mechanism, and the basic building block floating load balancing mechanism mainly is applicable to n _p=3 planetary pinion transmission;

(3) the high tooth in domestic south, heavy tooth company, Hangzhou forward gear company, State-owned Changhong Machinery Factory and Kazakhstan five major companies such as fly and have at least 14 routine wind power speed-increasing gearbox patent of invention NGW planet wheels to count n _p=3:

(C) domestic production full type roller bearing producer is few, price is high, and import SKF full type roller bearing price is higher, chronic.

(D) velocity ratio is reasonably combined does not have novelty, creativeness because velocity ratio reasonably combined be the distribution that belongs to gear ratio, do not have assorted petty relation with structure.In addition, velocity ratio has error not too large to the influence that passes slightly, because motor brick speed also has error.

[summary of the invention]

The object of the invention be to provide a kind of simple in structure, axial dimension short, the planetary speed reducer specially for roller way of in light weight, easy to maintenance and low cost of manufacture, " awl tooth+improvement quasi-planet " double reduction.

Improve the NGW Gear Planet Transmission of quasi-planet velocity ratio: the power dividing number doubles, and calculates to show that bearing capacity improves 40-45%.

[technological scheme]

Slow speed turbine stage adopts the quasi-planet transmission after improving: described quasi-planet transmission is meant that planet carrier is in stationary state in the NGW planetary mechanism; Quasi-planet transmission after the described improvement is meant between star-wheel there won't be any problem and ring gear two identical shunting gears, the branch fluxion is doubled, thereby improved bearing capacity greatly.

[beneficial effect]

The present invention is contrasted in the background technique (ZL200710068045.2) of patented invention, and its novelty, creativeness and practicability are embodied in:

(a) the present invention improves the big 40-45% of bearing capacity that quasi-planet velocity ratio background technique only has four (owing to be that basic building block floats, thereby the planet wheel number can only be three) planet wheels;

(h) the present invention's double reduction only, axial dimension is short, in light weight, easy to maintenance;

(c) price of existing cycloidal reducer is less than half of NGW planetary reducer.

[description of drawings]

Fig. 1. embodiment of the invention structural representation

[embodiment]

Below in conjunction with accompanying drawing the present invention is encyclopaedized:

With reference to Fig. 1. a kind of planetary speed reducer specially for roller way is characterized in that: forms by bevel gear pair+improvement quasi-planet transmission, wherein:

(a) the level bevel gear pair comprises casing (1) and drive bevel gear A that is mounted in it and driven wheel of differential B at a high speed, and casing (1) is connected on the quasi-planet frame (4), and bevel gear B is connected on the input shaft (2);

(b) quasi-planet after slow speed turbine stage improves comprises the sun gear (3) that is contained in input shaft (2) shaft extension end, be fixed on planet carrier (4) on support (5) end face, uniform planet wheel (8), be connected on output shaft (7) disk ring gear (12) and in order to two bearings (6) of supporting output shaft (7), bearing (6) is contained in support (5) endoporus, between described planet wheel (8) and the ring gear (12) two tooth number Z, modulus m shunting gear identical, the bilateral symmetry device (10) are arranged, planet wheel shaft (9) is fixed on the planet carrier (4) with shunting gear shaft (11).

Why Gear Planet Transmission is best structural type, is that power dividing is many more, bearing capacity is big more because have coaxial, interior engagement and power dividing three big characteristics.Because shunting gear (10) doubles the branch fluxion, thereby calculating shows that bearing capacity can improve 40-45% than (background technique) patent of invention (ZL200710068046.7);

Embodiment is to explanation of the present invention rather than qualification, and the scheme after any simple transformation all belongs to protection scope of the present invention.

Claims (1)

1. planetary speed reducer specially for roller way is characterized in that: forms by bevel gear pair+improvement quasi-planet transmission, wherein:

(a) the level bevel gear pair comprises casing (1) and drive bevel gear A that is mounted in it and driven wheel of differential B at a high speed, and casing (1) is connected on the quasi-planet frame (4), and bevel gear B is connected on the input shaft (2);

(b) quasi-planet after slow speed turbine stage improves comprises the sun gear (3) that is contained in input shaft (2) shaft extension end, be fixed on planet carrier (4) on support (5) end face, uniform planet wheel (8), be connected on output shaft (7) disk ring gear (12) and in order to two bearings (6) of supporting output shaft (7), bearing (6) is contained in support (5) endoporus, between described planet wheel (8) and the ring gear (12) two tooth number Z, modulus m shunting gear identical, the bilateral symmetry device (10) are arranged, planet wheel shaft (9) is fixed on the planet carrier (4) with shunting gear shaft (11).

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