CN2221124Y

CN2221124Y - Tandem planetary gear differential sped reducer

Info

Publication number: CN2221124Y
Application number: CN 95204928
Authority: CN
Inventors: 王宪平
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-10
Filing date: 1995-03-10
Publication date: 1996-02-28
Anticipated expiration: 2005-03-10

Abstract

The utility model relates to a duplex planetary gear differential speed reducer which is a speed changing mechanism in mechanical transmission. The utility model is characterized in that an input and an output shafts are in a coaxial line and are sheathed together, and a front and a back sun gears are fixed on the input shaft on which a gear ring frame is sheathed. A front planetary shaft is fixed on a front cover and a front planetary wheel is sheathed on the front planetary shaft; a back planetary frame and the output shaft form integration; a back planetary shaft is fixed on the back planetary frame, and a back planetary wheel is sheathed on the back planetary shaft. Because of using the tooth number difference between two planetary rows to realize deceleration, the utility model has the advantages of a few parts, small size and large speed ratio, compared with a same-stage speed reducer, the speed ratio can be enhanced by five to ten times, and the transmitting ratio can be selected from 10: 1 to 300: 1.

Description

The duplex planet differential-gear speed reducer

The utility model relates to the gear in a kind of mechanical transmission, particularly a kind of duplex planet differential-gear speed reducer of planetary pinion transmission.

Deficiencys such as at present, all kinds of gear reducer ubiquity volumes are big, and speed ratio is little.Though and the worm type of reduction gearing velocity ratio is bigger, its deficiency is to require high, easy to wear etc. to material and manufacturing technology.

The purpose of the utility model is to disclose the duplex planet differential-gear speed reducer that gear number of teeth difference between a kind of usefulness two planets row removes to realize the big retarding ratio at aforementioned the deficiencies in the prior art.

The utility model is realized as follows: the duplex planet differential-gear speed reducer, and it is by input shaft 3, and protecgulum 2, two is arranged the planetary gear train that links, and output shaft 12 and housing 16 are formed.Wherein, Input shaft 3 and output shaft 12 coaxial lines, and be fitted together by bearing housing.Sun gear 5 and rear sun gear 11 before being fixed with on input shaft 3, simultaneously, the gear ring frame 8 that has front ring gear 7 and back gear ring 9 is contained on the input shaft 3 between two sun gears by bearing housing.Planet axis 6 before being fixed with symmetrically on protecgulum 2, preceding planet wheel 1 is contained on the preceding planet axis 6 by bearing housing.Back planet carrier 14 is an one with output shaft 12, is symmetrically fixed with back planet axis 15 on the planet carrier 14 of back, and back planet wheel 10 is contained on the planet axis 15 of back by bearing housing.

Good effect of the present utility model is: owing to adopted the purpose that the realization of number of teeth difference is slowed down between two planets row, so its part is few, volume is little and speed ratio is big.Compare with retarder at the same level, speed ratio can improve 5-10 doubly.Velocity ratio can be 10: 1-300: select between 1.

Description of drawings is as follows:

Fig. 1 is a structural representation of the present utility model.

Wherein:

1, preceding planet wheel 2, protecgulum 3, input shaft 4, Front oil seal

5, preceding sun gear 6, preceding planet axis 7, front ring gear 8, gear ring frame

9, back gear ring 10, back planet wheel 11, rear sun gear 12, output shaft

13, Rear oil seal 14, back planet carrier 15, back planet axis 16, housing

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

As shown in Figure 1.The duplex planet differential-gear speed reducer is by input shaft 3, and protecgulum 2, two is arranged the planetary gear train that links, and output shaft 12 and housing 16 are formed.Wherein, Input shaft 3 and output shaft 12 coaxial lines, and be fitted together by bearing housing.Sun gear 5 and rear sun gear 11 before being fixed with on input shaft 3, simultaneously, the gear ring frame 8 that has front ring gear 7 and back gear ring 9 is contained on the input shaft 3 between two sun gears by bearing housing.Planet axis 6 before being fixed with symmetrically on protecgulum 2, preceding planet wheel 1 is contained on the preceding planet axis 6 by bearing housing.Back planet carrier 14 is an one with output shaft 12, is symmetrically fixed with back planet axis 15 on the planet carrier 14 of back, and back planet wheel 10 is contained on the planet axis 15 of back by bearing housing.Be 100 teeth with front ring gear 7 now, back gear ring 9 is 101 teeth, and it is example that front and back two

sun gears

5 and 11 are 40 teeth, and its transmission situation is described.When high rotating speed of input shaft 3 inputs, because of preceding planet wheel 1 is fixed on the protecgulum 2, it can not be around preceding sun gear 5 revolution.The number of teeth difference of back gear ring 9 just force back planet wheel 10 and back planet carrier 14 backward rotation (with input shaft in the same way), because of back planet carrier 14 and output shaft 12 one, so the time output shaft 12 produce slow-revving output.Its rotating speed is; The moving circle of gear ring frame 8 revolutions, output shaft rotates 1/101 circle, therefore forms 101: 1 speed ratio.Meanwhile the sun gear 5 on the input shaft 3 is promoting to have constituted the one-level retarded motion when front ring gear 7 rotates through preceding planet wheel 1, so duplex planet differential-gear speed reducer actual transmission is than being the product of two kinds of reduction speed ratio.That is: when planet row self reduction speed ratio be 2.5: 1, the speed ratio that is formed by two gear ring number of teeth differences is 101: 1 o'clock, the reduction speed ratio of this retarder is (2.5*101): 1=252.5: 1.Its output shaft 12 sense of rotation are; The front ring gear number of teeth is few, then with input shaft in the same way; The back gear ring number of teeth is few, and is then reverse with input shaft.

Claims

1, a kind of duplex planet differential-gear speed reducer, it is by input shaft (3), protecgulum (2), the planetary gear train that two rows link, output shaft (12) and housing (16) composition is characterized in that; Input shaft (3) and output shaft (12) coaxial line, and be fitted together by bearing housing, on input shaft (3), be fixed with preceding sun gear (5) and rear sun gear (11), simultaneously, the gear ring frame (8) that has front ring gear (7) and back gear ring (9) is contained on the input shaft (3) between two sun gears by bearing housing, be fixed with preceding planet axis (6) on protecgulum (2) symmetrically, preceding planet wheel (1) is contained on the preceding planet axis (6) by bearing housing.Back planet carrier (14) is an one with output shaft (12), is symmetrically fixed with back planet axis (15) on back planet carrier (14), and back planet wheel (10) is contained on the back planet axis (15) by bearing housing.