CN201351712Y

CN201351712Y - Differential type internal-tooth-free planet gear speed reducer

Info

Publication number: CN201351712Y
Application number: CNU2008202159915U
Authority: CN
Inventors: 陈建武; 谭家明
Original assignee: GUOMAO REDUCER GROUP CO Ltd
Current assignee: Changzhou Guomao reducer Limited by Share Ltd.; Jiangsu Guomao Reducer Group Co ltd
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2009-11-25
Anticipated expiration: 2018-11-27

Abstract

The utility model relates to a differential type internal-tooth-free planet gear speed reducer, which is provided with a machine base, a machine base cover, an input shaft and an output shaft. The input shaft is equipped and fixed with a dead gear, a moving gear and a rotatable sun gear, a dead shaft is equipped with a large dead planet gear and a small dead planet gear, one end of the output shaft is equipped and fixed with a planet carrier, a planet shaft is mounted on the planet carrier, a planet gear is mounted on the planet shaft, the planet gear is meshed with the moving gear and the sun gear, the small dead planet gear is meshed with the sun gear, and the large dead planet gear is meshed with the dead gear. The differential type internal-tooth-free planet gear speed reducer resolves technical problems that the existing planet gear speed reducer is high in internal teeth processing difficulty of an internal ring, is low in processing efficiency, low in speed reducing ratio, difficult to guarantee precision and high in processing cost, and affects service life and efficiency.

Description

Differential type does not have the inner tooth planet gear speed reducer

Technical field

The utility model belongs to universal machine, and relating to a kind of epicyclic reduction gear of planetary type machine, particularly differential type does not have the inner tooth planet gear speed reducer.

Background technique

At present, what planet-gear speed reducer mainly adopted is interior engaging mechanism, and its principle is, plural planet wheel is arranged between the sun gear in center portion and the ring gear, and ring gear is fixed on the support.Planet wheel plays idler or transfer function.Speed ratio mainly is that the sun gear number of teeth and ring gear number of teeth difference determine.When sun gear rotated, planet wheel was then done rotation and turnover campaign along ring gear and sun gear periphery.Because planet wheel is installed on the planet carrier on the output shaft, planet crop rotation turnover motion in fact also is the output shaft rotation.Thereby reach the purpose of deceleration.The deficiency of above-mentioned technology maximum is, the internal tooth difficulty of processing of inner ring is big, and the processing work efficiency is low, and the deceleration speed ratio is low, particularly after inner ring quenches, and distortion and oxide layer that gear ring and profile of tooth produce, very difficult grinding or fine finishing can only be adopted grinding.Therefore the speed reducer precision is difficult to guarantee that the processing cost height influences working life and efficient.

The model utility content

The technical problem that will solve of the present utility model is: the internal tooth difficulty of processing that solves existing planet-gear speed reducer inner ring too, the processing work efficiency is low, the deceleration speed ratio is low, precision is difficult to guarantee, the processing cost height influences the technical problem of working life and efficient, the utility model provides a kind of differential type not have the inner tooth planet gear speed reducer, it is reasonable that it has compact structure, and the deceleration speed ratio is big, and bearing capacity is strong, make simple, precision guarantees that easily purposes is wide, characteristics such as low cost of manufacture.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of differential type does not have the inner tooth planet gear speed reducer, has support, the support lid, input shaft and output shaft, input shaft is installed in support and covers, output shaft is installed on the support, support covers dead axle also is installed, be mounted with quiet the wheel on the input shaft, a driving wheel and a rotating sun gear, quiet major planets wheel and quiet asteroid wheel are installed on the dead axle, output shaft one end is mounted with planet carrier, planet axis is installed on planet carrier, planet wheel is installed on the planet axis, planet wheel and driving wheel and sun gear engagement, the engagement of quiet asteroid wheel and sun gear, quiet major planets wheel is taken turns engagement with quiet.

The utility model changes present planet-gear speed reducer internal tooth engagement into the external tooth engagement, with planet wheel rotation turnover dynamic formula structure, changes quiet moving parallel-connection structure into, with the quiet formula structure of sun gear, changes the moving structure of quiet moment into.Its principle is: the planet wheel rotation on the planet carrier and when sun gear has enough to meet the need.If sun gear is dynamic servo-actuated, a planet wheel rotation, and do not have enough to meet the need, at this moment planet carrier and output shaft are motionless.If, sun gear is maintained static, at this moment, the planet wheel turnover in fact also is planet carrier and output shaft rotation.Around this principle, as long as make sun gear produce different speed discrepancies, that planet wheel that is engaged with also will produce different turnovers.Thereby reached the purpose of slowing down.

The beneficial effects of the utility model are, this speed reducer has been removed ring gear, and the deceleration speed ratio can improve greatly, and support and gear can be designed to minimum dimension, rigidity is big, and bearing torque is big, and structure is compact more, therefore, manufacture cost reduces greatly, and quality of product and precision are guaranteed.

Description of drawings

Fig. 1 is the drive mechanism sectional view of planetary speed reducer;

Fig. 2 is that the A of planetary speed reducer is to the drive mechanism sectional view;

Among the figure: 1 input shaft, 2 is quietly taken turns, 3 dead axles, 4 supports lid, 5 sun gears, 6 quiet major planets wheels, 7 quiet asteroid wheels, 8 planet wheels, 9 driving wheels, 10 planet carriers, 11 planet axis, 12 supports, 13 output shafts.

Embodiment

There is not the inner tooth planet gear speed reducer from this differential type of accompanying drawing, input shaft 1 and dead axle 3 are installed on the support lid 4, be mounted with on the input shaft 1 quietly take turns 2, driving wheel 9 and a rotating sun gear 5. be equipped with quiet major planets wheel 6 and quiet asteroid wheel 7 on dead axle 3.Output shaft 13 is arranged on support, these output shaft 13 1 ends are mounted with planet carrier 10, and planet axis 11 is installed on planet carrier 10, and planet wheel 8 is installed on this planet axis, this planet wheel 8 and driving wheel 9 and sun gear 5 engagements, above-mentioned quiet asteroid wheel 7 also meshes with sun gear 5.Quiet major planets wheel 6 is taken turns 2 engagements with quiet.See accompanying drawing, its transmission principle is: quiet on the input shaft 1 take turns 2 and driving wheel 9 respectively engagement simultaneously rotate quiet major planets wheel 6 and planet wheel 8, the quiet asteroid wheel 7 on the quiet major planets wheel 6 meshes the sun gear 5 that is installed on the input shaft 1 simultaneously with planet wheel 8.Because the number of teeth difference of quiet moving two groups of gears, so transmission gives the speed on the sun gear 5 also different, but planet wheel 8 rotations also can have enough to meet the need, therefore regulated the tooth difference and the differential that brings.Thereby make the rotation of planet carrier 10 and output shaft 13.Reach the purpose of deceleration.See accompanying drawing.

Its gearing down principle is: when the 9 engagement planet wheels 8 of the driving wheel on the input shaft 1 rotated, if sun gear 5 maintains static, 8 rotations of planet wheel were simultaneously also along sun gear 5 peripheral turnovers.That is: planet carrier 10 output shafts 13 rotate.If sun gear 5 also rotates with planet wheel 8, so, planet wheel 8 has only rotation, and can not be along moving sun gear turnover, and promptly output shaft is motionless.If give moving 5 one fixing rotating speeds of sun gear.The turnaround speed of planet wheel 8 will change so.

According to above-mentioned principle, designed one group of quiet wheel and quiet planet wheel.To reach to 8 one fixing speed of sun gear.As long as the number of teeth difference of quiet moving two groups of gears, it is poor promptly to produce tooth, and the turnaround speed of planet wheel 8 will change.That is: the rotating speed of output shaft 13 will change.The tooth difference of two groups of gears is more little, and then velocity ratio is big more.Even can reach several a thousandths.Therefore, this structure does not need a lot of gear reductions, just can reach very big speed ratio, and volume can be designed to minimum dimension.See accompanying drawing.Sun gear 5 all meshes with two or more quiet moving planet wheels.To reach maximum bearing capacity.

This use is novel, and to have a compact conformation reasonable, and the deceleration speed ratio is big, and bearing capacity is strong, makes simply, and precision easily guarantees, Purposes is wide, the characteristics such as low cost of manufacture.

Claims

1, a kind of differential type does not have the inner tooth planet gear speed reducer, has support (12), support lid (4), input shaft (1) and output shaft (13), input shaft (1) is installed on the support lid (4), output shaft (13) is installed on the support (12), it is characterized in that: on the described support lid (4) dead axle (3) is installed also, be mounted with quiet wheel the (2) on the input shaft (1), a driving wheel (9) and a rotating sun gear (5), quiet major planets wheel (6) and quiet asteroid wheel (7) are installed on the dead axle (3), output shaft (13) one ends are mounted with planet carrier (10), planet axis (11) is installed on planet carrier (10), planet wheel (8) is installed on the planet axis (11), planet wheel (8) and driving wheel (9) and sun gear (5) engagement, quiet asteroid wheel (7) and sun gear (5) engagement, quiet major planets wheel (6) and quiet wheel the (2) engagement.

2, do not have the inner tooth planet gear speed reducer according to the described differential type of claim 1, be characterized in: input shaft (1) is concentric with output shaft (13).