CN201177029Y

CN201177029Y - Planet type few teeth difference decelerator

Info

Publication number: CN201177029Y
Application number: CNU200820066438XU
Authority: CN
Inventors: 喻幸福; 喻扬
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-10
Filing date: 2008-04-10
Publication date: 2009-01-07
Anticipated expiration: 2018-04-10

Abstract

The utility model discloses a sun small difference gear reducer relating to a mechanical transmission gear reducer, in particular to the gear reducer with a high speed ratio and heavy load. The gear reducer comprises an input stage of a sun gear group, an input stage formed by a pair of small difference inside engaged gears, a stand, a front end cover, a back end cover and a bearing cover. The input stage of the sun gear group comprises a sun gear and three sets of sun crank mechanisms, the output stage formed by the pair of small difference inside engaged gears comprises an output shaft and an output outer gear, three inner gear plates driven respectively by three groups of eccentric shafts, with three eccentric shafts arranged in a right triangular form in each of three groups, the output outer gear and an inner gear in the center of the inner gear plate forms the pair of small difference inside engaged gears. The gear reducer has the advantages of simple and compact structure, small volume, light weight, processing and manufacturing cost reduction, good economic benefit, stable transmission, good efficiency, low noise, large transmission ratio and improvement on carrying capacity and two available mounting ways of a base type and a suspension type, and is widely applicable to the industries of metallurgy, mine, water conservancy and hoisting transportation with low speed and heavy load.

Description

The fixed star little tooth difference speed reducer

Affiliated technical field

The utility model relates to the mechanical transmission retarder, especially the fixed star little tooth difference speed reducer of large speed ratio, heavy duty.

Background technique

The work requirements of a great variety, different of retarder is used heteroid retarder.What be applicable to large speed ratio, severe duty has two kinds of plane table thermoconductivity meter and ring plate formula little tooth difference speed reducers: typical plane table thermoconductivity meter is by the differential engagement between sun gear, planet wheel, the ring gear, make planet wheel in rotation, produce the revolution that centers on sun gear, and this revolution is converted into output by planet carrier, under the situation of single-stage, can form the velocity ratio more much bigger than fixed shaft gear train gear pair, under the situation of two-stage or plural serial stage, complete machine can reach very big speed ratio, forms very big output torque simultaneously; But its major defect is that link is too much, and the processing and assembling complexity simultaneously, because of taking the floating load balancing measure, has consumed sizable energy, so efficient reduces rapidly along with the increase of speed ratio in running.Ring plate formula little tooth difference speed reducer is a principle of utilizing quadratic crank mechanism, make ring plate under the driving of double-crank, form plane motion as connecting rod, mesh in few tooth difference by internal gear on the ring plate and output shaft external gear, form rotation output, because the single staged transmission ratio of few tooth difference mechanism can reach 100 even higher, if so add the suitable cooperation of level at a high speed, complete machine also can reach very big velocity ratio and output torque; But its major defect is that crank mechanism produces bigger added moment of inertia in the running, bearing is formed the impact of infringement property, influenced the working life of key components and parts, make complete machine produce bigger vibration and noise again, and, such retarder speed ratio series is very dull, be difficult to satisfy user's supporting requirement, limit because of structure again, the installation form of ring plate formula little tooth difference speed reducer can only be made base type, limited using scope, and these two kinds of retarders are also desirable not enough at the powerful aspect of performance of transmission.

Summary of the invention

At the deficiency of above-mentioned existence, that the utility model provides is a kind of big speed ratio, simple in structure, centralized driving, multiaxis are all carried the fixed star little tooth difference speed reducer of shunting, many ring plates internal gear and the multiple tooth engagement of output external gear, the big torque of output.

The technological scheme that its technical problem that solves the utility model adopts is: as Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, this fixed star little tooth difference speed reducer comprises sun gear family input stage, the output stage that few tooth difference internal gear pair constitutes, support (9), front cover (10), rear end cover (11), bearing cap (12), it is characterized in that: described sun gear family input stage comprises 1 sun gear---cylindrical gears (4) and 3 cover fixed star crank mechanisms are arranged with star pattern and are constituted, the output stage that described few tooth difference internal gear pair constitutes comprises output shaft (5), output external gear (6), be the common 3 internal tooth wheel plates (8) of doing plane motion that drive of eccentric shaft that equilateral triangle is arranged by 3 groups every group each 3 respectively, output external gear (6) constitutes few tooth difference internal gear pair with the internal gear at internal tooth wheel plate (8) center; Described 3 cover fixed star crank mechanisms are identical, respectively comprise 1 sun wheel---cylindrical gears (1), fixed star axle (2), 3 eccentric bushings (3) and eccentric bushing bearing (7), the input end of fixed star axle (2) is installed sun gear (1), the modulus of 3 sun gears, the number of teeth, the phase place of geometric parameter and keyway is identical, and sun gear, the number of teeth of sun gear is 3 multiple, the shaft axis of 3 sun wheels and the shaft axis of sun gear are parallel to each other, and with sun gear (4)---output external gear (6) shaft axis is that center line is the equilateral triangle layout, 3 sun gears (1) all form dead axle external gear pump pair with sun gear (4), by sun gear (4) centralized driving, make 3 sun wheels (1) rotation synchronously; In described 3 fixed star crank mechanisms, each fixed star axle (2) right-hand member is an input end, sun gear (1) is installed, left end is as output terminal, load onto 3 eccentric bushings (3) at the left end string, wherein the 1st eccentric bushing is identical with the phase angle of the 3rd eccentric bushing, and differ 180 ° with the phase angle of the 2nd eccentric bushing, eccentric bushing (3) and fixed star axle (2) key connecting, form crank, then the 1st crank is identical with the phase angle of the 3rd crank, and differ 180 ° with the phase angle of the 2nd crank, the phase angle of the eccentric bushing of 3 fixed star axles (2) opposite position is identical simultaneously, by the effect of eccentric bushing, the crank on 3 fixed star axles is finished all synchro eccentric rotation, drives 3 internal tooth wheel plates (8) jointly and does plane motion, the internal gear at internal tooth wheel plate (8) center and few tooth difference internal gear pair that output external gear (6) constitutes are rotatablely moved by output shaft (5) output of fixedlying connected with output external gear (6); The identical corresponding 3 internal tooth wheel plates (8) that drive of the eccentric synchronously rotation of eccentric bushing in described 3 groups every group each 3 phase angle are done corresponding plane motion, make the contact ratio and overlap ratio of the few tooth difference internal gear pair of output stage improve 3 times, when only needing contact ratio and overlap ratio with the few tooth difference internal gear pair of output stage to improve 2 times, on fixed star axle (2) output terminal of described 3 cover fixed star crank mechanisms, only need go here and there and load onto two eccentric bushings (3), the phase angle of two eccentric bushings differs 180 °, the phase angle of the eccentric bushing of opposite position is identical on 3 fixed star axles, the corresponding two internal tooth wheel plates (8) that drive are done plane motion, the internal gear at two internal tooth wheel plates (8) center constitutes few tooth difference internal gear pair with output external gear (6) respectively, is rotatablely moved by output shaft (5) output; Described few tooth difference internal gear pair is involute gear or double cycloid gear; Described support (9) can make two kinds of base type and suspension types.

The beneficial effects of the utility model are: adopt cylindrical gears and few tooth difference inside engaged gear two-stage transmission, velocity ratio is big, and the two-stage transmission can make multiple speed ratio as required, satisfies the different supporting demands of user; Adopt sun gear family centralized driving, multiaxis all to carry to shunt to have increased substantially and allow transmitted power; Three eccentric shafts drive the internal tooth wheel plate jointly, drive than two eccentric shafts, and internal tooth wheel plate stability is better, have improved the accuracy of mesh of internal gear with the output external gear; Many ring plates internal gear and output external gear leggy multiple tooth engagement have been eliminated the added moment of inertia that produces when crank mechanism rotates, and stable drive, loss is little, efficient is high, noise is low; Installation cost is made in simple in structure, simplified processing process, reduction; Input shaft and output shaft on a center line, make the tight Minato of structure, volume little, in light weight, save the energy, reduce consume, good in economic efficiency; Can make two kinds of mounting types of base type and suspension type, enlarge using scope.Can be widely used in metallurgy, mine, water conservancy, the lifting carrier of low speed, heavy duty.

Description of drawings

Fig. 1 is a complete machine structure External view of the present utility model.

Fig. 2 is an A-A revolved sectional view of the present utility model.

Fig. 3 is a B-B sectional drawing of the present utility model.

Fig. 4 is a C-C sectional drawing of the present utility model.

Fig. 5 is the structural representation of the utility model input stage, output stage.

The utility model is described in further detail to utilize drawings and Examples.

Embodiment

During the utility model manufacturing, earlier, on support (9), process the bearing bearing hole of output shaft (5), and be the center with the axle center in this hole by designing requirement, precision machining goes out to be the bearing bearing hole of 3 fixed star axles (2) of equilateral triangle layout, as the positioning hole of fixed star axle (2); Input end at each fixed star axle (2) is respectively processed a keyway, in order to sun wheel (1) to be installed, process 3 keyways at fixed star axle (2) output terminal in regular turn along shaft axis, the 1st keyway is identical with the phase angle of the 3rd keyway, and differ 180 ° with the phase angle of the 2nd keyway, in order to 3 eccentric shafts that constitute on the same fixed star axle in 3 eccentric bushings (3) back to be installed, wherein the 1st eccentric shaft is identical with the 3rd eccentric shaft phase angle, and differ 180 ° with the 2nd eccentric shaft phase angle, and its phase angle of eccentric shaft of opposite position is identical on 3 fixed star axles, form 3 groups every group each 3 complete synchronous off-centre rotations, fixed star axle (2) input end is bearing on the fixed star axle positioning hole of support (9), and output terminal is bearing on the rear end cover (11); Internal gear is made to have in 3 internal tooth wheel plates (8) center, with the internal gear axle center is that the center is three bearing holes of equilateral triangle layout work, in order to setting-up eccentricity cover bearing (7), each bearing hole is a concentric circle with the positioning bearing hole of fixed star axle (2) respectively, 3 eccentric bushings (3) that 3 fixed star axles (2) are upward installed are packed in the eccentric bushing bearing (7), then 3 groups every group 3 complete synchronous off-centre have been rotated the crank effect, drive 3 internal tooth wheel plates (8) and do plane motion; Output shaft (5) one end bearings are on the bearing hole at support (9) center, and the other end is bearing in the center hole of rear end cover (11); Output shaft (5) is gone up the output external gear of installing (6) and is constituted few tooth difference internal gear pair with internal gear; Sun gear (4) is installed on the motor shaft extension, by motor flange and front cover (10) seam location and be fixedly connected, sun gear (4) and 3 sun wheels (1) is constituted dead axle sun gear family external gear pump pair.

The user noise and vibration are required under the not too high situation, can adopt two internal tooth wheel plates (8) even 1 internal tooth wheel plate (8) and output external gear (6) to constitute few tooth difference internal gear pair according to the actual requirements.

Claims

1, a kind of fixed star little tooth difference speed reducer, comprise sun gear family input stage, the output stage that few tooth difference internal gear pair constitutes, support (9), front cover (10), rear end cover (11), bearing cap (12), it is characterized in that: described sun gear family input stage comprises 1 sun gear---cylindrical gears (4) and 3 cover fixed star crank mechanisms are arranged with star pattern and are constituted, the output stage that described few tooth difference internal gear pair constitutes comprises output shaft (5), output external gear (6), be the common 3 internal tooth wheel plates (8) of doing plane motion that drive of eccentric shaft that equilateral triangle is arranged by 3 groups every group each 3 respectively, output external gear (6) constitutes few tooth difference internal gear pair with the internal gear at internal tooth wheel plate (8) center.

2, fixed star little tooth difference speed reducer according to claim 1, it is characterized in that: described 3 cover fixed star crank mechanisms are identical, respectively comprise 1 sun wheel---cylindrical gears (1), fixed star axle (2), 3 eccentric bushings (3) and eccentric bushing bearing (7), the input end of fixed star axle (2) is installed sun gear (1), the modulus of 3 sun gears, the number of teeth, the phase place of geometric parameter and keyway is identical, and sun gear, the number of teeth of sun gear is 3 multiple, the shaft axis of 3 sun wheels and the shaft axis of sun gear are parallel to each other, and with sun gear (4)---output external gear (6) shaft axis is that center line is the equilateral triangle layout, 3 sun gears (1) all form dead axle external gear pump pair with sun gear (4), by sun gear (4) centralized driving, make 3 sun wheels (1) rotation synchronously.

3, fixed star little tooth difference speed reducer according to claim 1, it is characterized in that: in described 3 fixed star crank mechanisms, each fixed star axle (2) right-hand member is an input end, sun gear (1) is installed, left end is as output terminal, load onto 3 eccentric bushings (3) at the left end string, wherein the 1st eccentric bushing is identical with the phase angle of the 3rd eccentric bushing, and differ 180 ° with the phase angle of the 2nd eccentric bushing, eccentric bushing (3) and fixed star axle (2) key connecting, form crank, then the 1st crank is identical with the phase angle of the 3rd crank, and differing 180 ° with the phase angle of the 2nd crank, the phase angle of the eccentric bushing of 3 fixed star axles (2) opposite position is identical simultaneously, by the effect of eccentric bushing, crank on 3 fixed star axles is finished all synchro eccentric rotation, the common 3 internal tooth wheel plates (8) that drive are done plane motion, and the internal gear at internal tooth wheel plate (8) center and few tooth difference internal gear pair that output external gear (6) constitutes are rotatablely moved by output shaft (5) output of fixedlying connected with output external gear (6).

4, fixed star little tooth difference speed reducer according to claim 1, it is characterized in that: the eccentric synchronously rotation of eccentric bushing that described 3 groups every group each 3 phase angle are identical, the corresponding 3 internal tooth wheel plates (8) that drive are done corresponding plane motion, make the contact ratio and overlap ratio of the few tooth difference internal gear pair of output stage improve 3 times, when only needing contact ratio and overlap ratio with the few tooth difference internal gear pair of output stage to improve 2 times, on fixed star axle (2) output terminal of described 3 cover fixed star crank mechanisms, only need go here and there and load onto two eccentric bushings (3), the phase angle of two eccentric bushings differs 180 °, the phase angle of the eccentric bushing of opposite position is identical on 3 fixed star axles, the corresponding two internal tooth wheel plates (8) that drive are done plane motion, the internal gear at two internal tooth wheel plates (8) center constitutes few tooth difference internal gear pair with output external gear (6) respectively, is rotatablely moved by output shaft (5) output.

5, fixed star little tooth difference speed reducer according to claim 1 is characterized in that: described few tooth difference internal gear pair is involute gear or double cycloid gear.

6, fixed star little tooth difference speed reducer according to claim 1 is characterized in that: support (9) can make two kinds of base type and suspension types.