CN2059200U

CN2059200U - Double crank single gear ring less tooth difference planetary reducer

Info

Publication number: CN2059200U
Application number: CN 89213292
Authority: CN
Inventors: 唐国良; 汪蜀浩
Original assignee: Chongqing Iron and Steel Co Ltd
Current assignee: Chongqing Iron and Steel Co Ltd
Priority date: 1989-11-02
Filing date: 1989-11-02
Publication date: 1990-07-11

Abstract

The utility model relates to a double crank single gear ring less tooth difference planetary reducer. The double crank single gear ring less tooth difference planetary reducer is designed according to a double-crank mechanism and the principle of few teeth difference planetary transmission. The double crank single gear ring less tooth difference planetary reducer is a universal device used for transmitting power in a mechanism device. The double crank single gear ring less tooth difference planetary reducer has a unique structure, a single gear ring which can overcome dead center, and the ability of self locking. The double crank single gear ring less tooth difference planetary reducer has the advantages of big transmitting ratio, high capability, a plurality of spindle ends input and output, a small size, and simple fabrication. The double crank single gear ring less tooth difference planetary reducer can be used in various mechanical devices.

Description

Double crank single gear ring less tooth difference planetary reducer

The utility model belongs to mechanical transmission, particularly a kind of monodentate ring fewer differential teeth planetary speed reducer that can overcome the dead point.

No. 85106692.2 Chinese patents of prior art are the three-ring speed reducers that can overcome the dead point, are made up of three double crank mechanisms of 120 ° of interlacing.Its deficiency is that the profile of tooth halving precision of three ring tooth plates requires height, complex structure, mechanical processing technique are difficult to guarantee that three-throw crankshaft structure assembling difficulty is big, the cumulative error link is many, retarder after the assembling easily heating and noise is big, the internal tooth of three monodentate ring flat-plates respectively with the external tooth engagement of output shaft because the influence of machining error, can not reach satisfied precision, dimension must use soft tooth to remedy this shortcoming, thereby limit the raising of intensity; Three ring tooth plates will produce an axial force to output shaft during motion again not in same plane, make output shaft generation axial float, influence working life, and the cost height.

The purpose of this utility model is to provide a kind of can overcome the deficiency that above-mentioned prior art exists, the structure uniqueness, and machinability is good, and bearing capacity is big, running is steady, and noise is little, and is in light weight, and volume is little, velocity ratio is big, has input of multiaxis end and output, the speed reducer of easy-maintaining.

In order to achieve the above object, the utility model adopts following structure.Accompanying drawing 1 is a structural representation of the present utility model, and wherein 1 is casing, and 2 is output shaft, 3 external gears for few tooth difference engagement driving, and 4 is eccentric bushing, and 5 is the monodentate ring flat-plate, and 6 is driving gear, and 7 is input shaft, and 8 is empty cover carrier gear, and 9 for paying axle; The centre distance of input shaft and output shaft equals to pay the centre distance (in figure A) of axle with output shaft; The utility model becomes the connecting rod in the double crank mechanism monodentate ring flat-plate 5 and forms few tooth difference transmission mechanism by monodentate ring flat-plate 5 and few tooth difference engagement driving external gear 3, drive monodentate ring flat-plate 5 by the eccentric bushing on 7 pairs of axles 9 of input shaft and the axle 4 and do plane motion, and the internal tooth of monodentate ring flat-plate 5 makes output shaft 2 rotations with few tooth difference engagement driving external gear 3 with few tooth difference engagement.For overcoming the dead point phenomenon, on input shaft 7 and pair axle 9, be fixed with the sky cover carrier gear 8 symmetrical engagements on a pair of number of teeth equal driving gear 6 and the output shaft 2, when input shaft 7 rotations, the driving gear 6 of driving gear 6 on the input shaft 7 on sky cover carrier gear 8 transmissions payment axle 9, make and pay axle 9 and input shaft 7 and rotatablely move, thereby overcome the dead point phenomenon that monodentate ring flat-plate 5 produces when motion as in-phase synchronization.

The utility model compared with prior art has following obvious advantage:

1. the utility model has in the big advantage of engagement place composite curve radius with few tooth difference internal tooth engagement driving form, and intensity improves greatly, though identical with planetary drive with small teeth difference, there is not the complicated output mechanism of multiple faults of planetary drive with small teeth difference indispensability.

2. the utility model only meshes with the internal tooth of a ring flat-plate and the external tooth of output shaft, and the engagement contact precision easily guarantees, is beneficial to the hardness that improves the flank of tooth.

3. the utility model only adopts a ring flat-plate, and is simple in structure, do not have special workpiece, adopt the single eccentric shaft structure, thereby technology capability is good, installs simply, and integrating error are little, easily guarantee design and operational requirement, and cost is low.

4. the utility model velocity ratio is big, is i=7.5～99, and 24 kinds of multiaxis end assembling forms are arranged, and subseries are various, and self-lock ability is arranged, the intensity height, and bearing capacity is big, and volume is little, and is in light weight, and output shaft does not exist axial float, long service life.

Claims

1, a kind of double-crank monodentate ring fewer differential teeth planetary subtracts and states device, it is characterized in that:

(1), has one by eccentric bushing 4, input shaft 7, pair axle 9, the transmission external gear 3 of few tooth difference engagement, the reducing transmission structure that output shaft 2 and monodentate ring flat-plate 5 etc. is formed;

(2), has one by input shaft 7 and pair axle 9, driving gear 6, output shaft 2, the structure that overcomes the double crank mechanism dead point of compositions such as empty cover carrier gear 8.

2, retarder according to claim 1 is characterized in that input shaft 7 and output shaft 2 and pays axle 9 equating with the centre distance of output shaft 2.