CN2303125Y

CN2303125Y - Planetary reducer

Info

Publication number: CN2303125Y
Application number: CN 97235677
Authority: CN
Inventors: 方祖彭; 方丹; 方芳; 赵亚芬
Original assignee: 方祖彭
Priority date: 1996-04-19
Filing date: 1997-04-08
Publication date: 1999-01-06
Anticipated expiration: 2007-04-08

Abstract

A double-stage planetary reducer with a group of pin shaft output mechanisms is characterized in that two ends of a pin shaft 6 are fixedly connected to planetary wheels 7 and 18, the planetary wheels 8 and 9 as a whole are provided with a passage hole 20 for the pin shaft 6 to pass through in a non-contact manner, the pin shaft 6 as an output element does not consume power when running, an input shaft of the double-stage planetary reducer is a shaft system with static and dynamic balance, the double-stage planetary reducer is also provided with two zero-load supports 3 and 13, the integral ratio is more than 11-15000, the efficiency can be as high as 97%, the speed ratio can reach 80% when being 4000, and the power can be larger than.

Description

Planetary speed reducer

The utility model relates to a kind of planetary speed reducer, particularly a kind of NN type twin-stage planetary speed reducer with two internal gears.

In the prior art, its input bearings at both ends of the 678th page of described NN type little tooth difference speed reducer of volume is being carried the onesize support reaction of engaging force in the mechanical design handbook that Chemical Industry Press published in 82 years, and the bearing of ring gear must carry bigger couple and counter-force, it also must establish counterweight in addition, and these have all limited its adaptability and superiority.And the pin axle type output mechanism shown in this book same page bottom is a kind of wasted work element, the power on this bearing pin of acting on is about the twice of engaging force, and with engaging force one trace-stacking affact to use and be with on the eccentric rotary arm bearing, the efficiency test of analysis and model machine as calculated, it is described to submit a written statement to a higher authority, and few tooth difference speed reducer of pin axle type output mechanism, the bearing pin part wasted work of cycloidal planetary gear speed reducer are about the 10-15% of total output.

The purpose of this utility model then is the problem that exists at above-mentioned prior art, wasted work not when having designed a kind of bearing pin running as output element, and its input shaft is a kind of quiet, axle system that dynamic balancing possesses, does not need to establish in addition the planetary speed reducer of counterweight.

Technical solution of the present utility model:

A kind of NN type twin-stage planetary speed reducer with two internal gears, wherein the ring gear in the first order planetary gear train 10 is for being consolidated in the static element on the housing, be meshed with ring gear 10, and be in each other 180 ° of

locational planet wheels

9 and 18 and be bearing in eccentric wheel 11 and 17 that offset equates separately separately on the bearing 14 and 15 outer ring of outer rim, ring gear 4 in the planetary gear train of the second level is the movement parts as output element, ring gear 4 is the integral body with identical axle center with output shaft 1, be meshed with ring gear 4, and be in each other 180 ° of locational planet wheels 7 and 8 and be bearing in eccentric wheel 19 and 17 that offset equates separately separately on the bearing 5 and 16 outer ring of outer rim, it is characterized in that being between the secondary planet wheel 7 of same phase and the one-level planet wheel 18 is to be positioned at bearing 5 by a group switching centre circle, 14 outer rim is to planet wheel 7, average diameter between 18 the root circle, quantity is more than four and the two ends concrete mutually of the bearing pin 6 that equates of its center angle; Make and have quantity on whole one-level planet wheel 9 and the secondary planet wheel 8 and equate that with bearing pin 6 center circle equates with the center circle of bearing pin 6, the hole, one group of passageway 20 that supply and marketing axle 6 contactlessly passes separately.

Advantage of the present utility model:

Zero tooth difference parameter is adopted in the utility model such as the second level, and then its ratio coverage can be from more than the 11-15000, the transmission total efficiency reaches 97%-80% between speed ratio 11-4000, so the efficient reduced rate when it increases with speed ratio is little, so can be adapted to high-power, the product development of big speed ratio, this is because the line of contact speed of few tooth difference is very low, the event of 1-2% that its engagement wasted work only accounts for total output.

Profile of tooth of the present utility model can be adapted to involute less tooth difference profile of tooth, cycloidal-pin wheel profile of tooth and arc toothed, horizontal, vertical type, transmission power that installation form can be used for coaxial type can reach more than the 5000KW, in addition, it also has the advantage of little pitch diameter, big speed ratio, big modulus, high-bearing capacity, high transmission efficiency, as: pitch diameter is about 180mm, and velocity ratio is can obtain the bearing capacity of 6mm modulus at 527 o'clock; As by facewidth B=20mm, the basic flexural stress during unit facewidth modulus is 5kg/mm ²Then its output torque can be up to 110kg-M for meter.

The low noise that involute less tooth difference type speed reducer has, LCS is well-known.

Fig. 1 is the utility model structural representation.

Below in conjunction with accompanying drawing the utility model is further described:

Planet wheel 18 in the first order planetary gear train relies on one group of bearing pin 6 contactlessly to cross hole, passageway 20, moment of torsion and corner is passed on the second level planet wheel 7, and clearly be a kind of no energy consumption mechanism as the bearing pin 6 of output mechanism.And planet wheel 9 and planet wheel 8 are owing to be an integral body, the moment of torsion between them and the transmission of corner are except that the profile of tooth engagement, also be a kind of no energy consumption output, because the pitch diameter of ring gear 4,10 about equally, so the engaging force of

planet wheel

7,8,9,18 also about equally, direction is opposite, because the engaging force of planet wheel 7,18 and planet wheel 8,9 is in each other on 180 ° the position all the time, event is with the block bearing the 3, the 13rd of the input shaft 12 of three eccentric wheels 19,17,11, and a kind of zero carries supporting, this has just reduced cost, has improved transmission efficiency.For ring gear 10,

planet wheel

9 and 18 engaging force equal and opposite in direction, direction is opposite, acts on two little Different Plane of distance, form less couple, equally, for ring gear 4, planet wheel 7 and 8 engaging force equal and opposite in direction, direction is opposite, act on two little Different Plane of distance, formed less couple, much smaller as a kind of relatively monolateral engagement of support reaction of the block bearing 2 of inner ring 4 like this.

Implementing the best approach of the present utility model is to choose the less number of teeth to obtain bigger modulus and bigger bearing capacity, and the secondary planet train then can obtain the little speed ratio of big modulus when adopting zero tooth difference.The ring gear material can select nitriding steel for use in order to avoid the mill internal tooth operation of the costliness that heat treatment deformation brought.Implementing main lathe of the present utility model is: gear hobbing machine, gear shaping machine, upright, crouch, milling machine, lathe, planer and heat treatment installation etc.

Claims

1, a kind of NN type twin-stage planetary speed reducer with two internal gears, wherein the ring gear (10) in the first order planetary gear train is for being consolidated in the static element on the housing, be meshed with ring gear (10), and be in 180 ° of locational planet wheels (9) and (18) each other and be bearing in eccentric wheel (11) that offset equates and (17) separately separately on the outer ring of the bearing of outer rim (14) and (15), ring gear in the planetary gear train of the second level (4) is the movement parts as output element, ring gear (4) is the integral body with identical axle center with output shaft (1), be meshed with ring gear (4), and be in 180 ° of locational planet wheels (7) and (8) each other and be bearing in eccentric wheel (19) that offset equates and (17) separately separately on the outer ring of the bearing of outer rim (5) and (16), it is characterized in that being between the secondary planet wheel (7) of same phase and the one-level planet wheel (18) is to be positioned at bearing (5) by a group switching centre circle, (14) outer rim is to planet wheel (7), (18) average diameter between the root circle, quantity is more than four and the two ends concrete mutually of the bearing pin (6) that equates of its center angle; Making whole one-level planet wheel (9) and secondary planet takes turns and has quantity on (8) and equate that with bearing pin (6) center circle equates with the center circle of bearing pin (6), the hole, one group of passageway (20) that supply and marketing axle (6) contactlessly passes separately.

2, planetary speed reducer according to claim 1 is characterized in that profile of tooth is involute less tooth difference type, cycloidal-pin wheel type and arc toothed.

3, planetary speed reducer according to claim 1 is characterized in that velocity ratio is more than the 11-15000, and power reaches vertical, the horizontal twin-stage planetary speed reducer of 5000KW.