CN2491651Y

CN2491651Y - Reverse synchronous reductor set

Info

Publication number: CN2491651Y
Application number: CN 00251859
Authority: CN
Inventors: 郑悦
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-27
Filing date: 2000-09-27
Publication date: 2002-05-15
Anticipated expiration: 2010-09-27

Abstract

The utility model relates to a reversal and synchronous speed reducer set with small teeth difference, in particular to the reversal and synchronous speed reducer set of an epicyclic transmission with small teeth difference and double inner gearing of a double-ply gear. The utility model comprises at least a speed reducer with small teeth difference and double inner gearing of which the sways of input and output are synthetic, and at least a speed reducer with small teeth difference and double inner gearing of which the sways of input and output are reversal. The absolute value of speed reducing ratio of the two speed reducers are equal, thereby engineering requirements of machineries which are in synchronous operating but are in mutual reversing rotation of a rolling body, such as a blender, a rolling mill, a cane crusher, a sugar manufacturing machinery, a grinder, a plastic extrusion machine, a crusher, a feeding and a conveying machinery and the like, can be met.

Description

Reverse sync deceleration unit

The utility model relates to the mechanical transmissioning technology field, especially reverse and synchronization aspects.

At present, known planetary drive with small teeth difference has the technical bottleneck that the planetary bearing load is difficult to lower, the engagement planetary drive with small teeth difference was the 5232412 described technological inventions of U.S.'s patent of invention in double-layer gear was two, though thoroughly solved problems such as few tooth difference transmission planetary bearing load, but because of the outer planetary diameter of itself and fixed annulus engagement greater than with the planetary diameter of internal layer of output inner gear engagement, so input shaft is identical with the output shaft tool turns to.The cycloid fewer differential teeth planetary decelerator then is input and output switched in opposite.Some engineering occasions need use simultaneously input output in the same way speed reducer and the absolute value of the reverse speed reducer of input output and its reduction speed ratio equate, i.e. reverse sync deceleration unit, this is that few tooth difference class speed reducer of present compact structure still is difficult to accomplish.

The purpose of this utility model is the reverse sync deceleration unit that proposes few tooth difference class, to satisfy the corresponding engineering needs.

The purpose of this utility model is achieved in that in two and meshes in the planetary drive with small teeth difference that with the number of teeth G3 of output inner gear (number of teeth is G4) planet gear meshed, the number of teeth G1 with fixed annulus (number of teeth is G2) planet gear meshed meets reduction speed ratio

IG=1/ (1-G2G3/G1G4)＜0 is G2G3/G1G4＞1

Make the switched in opposite of input output, constitute reverse speed reducer; And the tooth number Z 4 of the output inner gear of the two interior engaging speed reducers of few tooth difference of known technology, the planetary number of teeth that is engaged with is Z3, and the number of teeth of fixed annulus is Z2, and the planetary number of teeth that is engaged with is Z1, meets reduction speed ratio

It is identical that IZ=1/ (1-Z2Z3/Z1Z4)＞0 is that Z2Z3/Z1Z4＜1 turns to input output, constitutes the forward speed reducer; And, order

Z2·Z3/Z1·Z4+G2·G3/G1·G4＝2

Make and promptly obtain above-mentioned reverse sync deceleration unit by IZ=IG.

For etc. the number of teeth poor (Z2-Z1=Z4-Z3=ZD, average case G4-G3=G2-G1=GD) as Z1＞Z3, promptly have IZ＞0; As G3＞G1, IG＜0. is arranged promptly

Further, forward and reverse speed reducer has identical planetary bearing setting because of having identical output torque, thereby the internal layer planetary pinion of the two (Z3 and G1) diameter should be close, Z3=G1 particularly, and ZD=GD, Z4=G2 is also just arranged, at this moment, for IZ=1/ (1-Z2Z3/Z1Z4), when (IZ+1) Z3ZD/ (IZZD-Z3) is an integer, make G3 equal this integer so, and G4=G3+GD=G3+ZD, Jue Ding IG=1/ (1-G2G3/G1G4) just satisfies IZ=-IG like this.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 be the output shaft double-layer gear opposite with steering input shaft two in the structural drawing of engagement fewer differential teeth planetary decelerators, it meshes planetary drive with small teeth difference in two with the double-layer gear of above-mentioned prior art forward speed reducers are easy to constitute in a manner described reverse sync deceleration unit.

Fig. 2 A is that Fig. 2 B is the structural representation that this example is used the technological scheme of reverse sync deceleration unit of the present utility model as the structural representation of embodiment's concrete stirring chest prior art scheme.

Among the figure, 1-internal layer planetary pinion, the number of teeth is G1; 2-fixed annulus, the number of teeth are G2; 3-outer planetary pinion, the number of teeth are G3; 4-output inner gear, the number of teeth are G4; 5-input shaft; 6-casing; 11-left lateral star bearing, 12-right lateral star bearing; 51-left side input bearing, 52-right input bearing: 41-left side output bearing, 42-right output bearing; 53-left equilibrium block, 54-right equilibrium block; 55-input oil sealing, 56-input end cap; 43-output oil sealing, 44-output end cap; 7-concrete stirs cell body, 8-left stirring shaft, 9 right stirring shafts; 10-left synchromesh gear, 110-right synchromesh gear; 120-left forward speed reducer, 13-right forward speed reducer, 16-right oppositely speed reducer; 14-left motor, 15-right motor; 17-left synchronous sprocket wheel, 18-right synchronous sprocket wheel.

In Fig. 1, the throw of eccentric of the eccentric shaft part of one is e on the input shaft 5, support internal layer planetary pinions 1 through left lateral star bearing 11 and right lateral star bearing 12 on the eccentric shaft part, internal layer planetary pinion 1 is through little distortion welding or machinery assembling or glued joint the coaxial outer planetary pinion 3 that is connected, in, outer planetary facewidth center line is A-A, both its facewidth was B/2 in center line A-A both sides, a left side, right lateral star bearing also is symmetrical for center line A-A, outer planetary pinion 3 suffered positive moment of torsion engagement tangential forces and internal layer planetary pinion 1 suffered reaction torque engagement tangential force big portion for planetary bearing are offset, alleviated the load of planetary bearing greatly; Input shaft 5 be through left side input bearing 51 and right input bearing 52 be supported on the left cover of fixed annulus 2 one and with the output shaft of output inner gear 4 one in, the left and right equilibrium block balance that installs on the input shaft centrifugal force on the eccentric direction that produces of planetary system; Internal layer planetary pinion 1 and fixed annulus 2 engagements, under this standard, do and not only revolve round the sun but also the planetary motion of rotation, this motion is slowly rotated the output inner gear 4 that meshes with outer planetary pinion 3, and make opposite with input shaft of turning to of output shaft because of above-mentioned G2G3/G1G4＞1, constitute the required reverse speed reducer of synchronous backward deceleration unit, note more than should be than the external diameter of the fixed annulus 2 big 2 times eccentric distance e of the internal diameter of outer planetary pinion 3, to guarantee the two not grazing in the planetary motion.With the output shaft of output inner gear 4 one be to be supported within the casing 6 through left and right output bearing 41 and 42.Be loaded on input within the end cap 56 input oil sealing 55 and be loaded on the sealing that output oil sealing 43 within the output end cap 44 has formed input, output terminal respectively.

The reverse speed reducer of Gou Chenging like this, with the two interior engagement fewer differential teeth planetary decelerator one forward speed reducers of above-mentioned U.S. patent of invention 5232412 described double-layer gears, be easy to constitute in a manner described the synchronous backward deceleration unit of double-layer gear, its planetary bearing load significantly reduces, and have the bearing capacity that far exceeds parallel axes speed reducer and cycloid speed reducer, can be used for the large power overloading transmission.

Realizing one of good mode of the present utility model, is the embodiment that the described synchronous backward deceleration unit that is used for the concrete stirring chest of Fig. 2 A, B drives.

Among Fig. 2 A, stir the left side in the cell body 7, right stirring shaft 8, the 9th, switched in opposite as shown, they are respectively by a left side,

right motor

14,15 drive left forward speed reducer 120 and right forward speed reducer 13 through belt transmission, driving direction be speed reducer steering input shaft as shown, the output shaft of two speed reducers turns to opposite as shown, like this, needing gear ratio is the left side of 1: 1 outer gearing, right

synchromesh gear

10 and 110 makes a left side in output terminal, right stirring shaft 8, the running of 9 reverse sync, because synchromesh gear acts on output torque, so will do very greatly, heaviness, and still be easy to damage.The all fronts shut-down that damage causes can cause serious economy loss.

If synchronous effect in the input torque of speed reducer promptly can be easily, accurately, accomplish that reliably obviously its ability and functional reliability of bearing unbalanced impulsive load improves with the reduction speed ratio multiple.In Fig. 2 B, being installed in respectively with illustrated 1: 1 left and right

synchronous sprocket wheel

17,18 to be connected on the input shaft of left forward speed reducer 120 and right oppositely speed reducer 16 and with chain makes the input shaft of forward and reverse speed reducer rotate in the same way with speed, can finish synchronously at input end, but so, left and

right speed reducer

120,16 is must input redirects identical and absolute value output switched in opposite and reduction speed ratio equates, promptly need be with reverse sync deceleration unit of the present utility model.Mesh reverse speed reducers in its right oppositely speed reducer 16 is can be with the described double-layer gear of above Fig. 1 two.Further embodiment is: engagement forward speed reducer in the double-layer gear of above-mentioned prior art is two, Z1=110, Z2=114, Z3=55, Z4=59, reduction speed ratio IZ=1/ (1-Z2 Z3/Z1 Z4)=29.50002147484; The number of teeth difference GD=ZD=4 of the reverse speed reducer of double-layer gear of the present utility model, as number of teeth G1=57, G2=61, G3=114, G4=118, meet G2 G3/G1 G4+Z2 Z3/Z1 Z4=2, so its reduction speed ratio IG=1/ (1-G2 G3/G1 G4)=-29.50002147484=-IZ, be made into the reverse sync deceleration unit of double-layer gear.It places the left and right synchronous sprocket wheel of speed reducer input end promptly satisfied with minor diameter strand wheel, the synchronous needs of powerful left and right stirring shaft.

If oppositely speed reducer is to be to be fixed with the driven gear (number of teeth is ZG2) that a pair of external gear pump is paid on the input shaft of the forward speed reducers of engagement in IG2 two by reduction speed ratio, and the input end of the reverse speed reducer of the driving gear that external gear pump is paid (number of teeth is ZG1) conduct constitutes, be fixed with the number of teeth on the input shaft of driving gear that external gear pump is paid and forward speed reducer (reduction speed ratio is IZ) respectively coaxially and be the synchronous sprocket wheel of ZCG and ZCZ and be connected with chain, as long as meeting ZCGIG2ZG2/ZG1=ZCZIZ so just makes, oppositely the output shaft reverse sync of speed reducer is rotated, also can realize above-mentioned synchronous at input end, but this external gear pump is just being paid the two interior engagements of above-mentioned double-layer gear, oppositely speed reducer is compared the strength weak link that will become in the Transmitted chains, and volume, cost all is not calculate, and can only can be regarded as alternative plan.

Usually, above-mentioned synchronous backward speed reducer prescription case also generally is suitable for for the two interior engagement planetary drive with small teeth difference of non-double-layer gear, but its planetary bearing will bear very big load.

The utility model also is applicable to be needed to turn round but the machinery such as the rolling mill of mutual counter-rotational rolling element with speed, sugar-cane press, press sugared machine, grinding machine, plastic extruder, shredder and feeding, conveying mechanism etc., principle is the same, all be that input end with reverse sync deceleration unit replaces heavy flimsy output terminal synchromesh gear synchronously, just, oppositely speed reducer is by motor driving, just, the corresponding mutual counter-rotational Kun of rolling that connects rolling mill respectively of output shaft of reverse speed reducer, or connect sugar-cane press respectively or press sugared machine or grinding machine or plastic extruder or shredder or feeding, the mutual counter-rotational rolling element of machinery such as conveying mechanism needn't be narrated one by one.Forward speed reducer in the application (or reverse speed reducer) can be 1, also can be 2 or many, and for example the sugar-cane press of 3 Kun needs the reverse sync deceleration unit of 2 of forward speed reducers, reverse 1 formation of speed reducer, or the like.

Need to prove, the absolute value of the reduction speed ratio of forward speed reducer and reverse speed reducer does not need equal fully in some occasions, as long as its difference is enough little, make in sufficiently long work period, in an operation cycle, in the overhaul of the equipments phase at the most in the speed reducer lifetime, the relative rotation angle of the speed reducer output shaft that the difference of above-mentioned reduction speed ratio absolute value causes is still in the scope that work mechanism allows, so this relative reverse sync but not absolute reverse sync, be IZ ≈-IG, Z2Z3/Z1Z4+G2G3/G1G4 ≈ 2 allows.This point can make available number of teeth combination become many, and the range of choice during design is corresponding to broaden.

Claims

1. reverse sync deceleration unit, comprise that the reduction speed ratio absolute value is near equating and input shaft and output shaft turn at least respectively 1 of the reverse speed reducer of identical forward speed reducer and switched in opposite, it is characterized in that: forward speed reducer and reverse speed reducer all are two interior engagement fewer differential teeth planetary decelerators, oppositely in the speed reducer, with the number of teeth of output inner gear (number of teeth is G4) planet gear meshed be G3, with the number of teeth of fixed annulus (number of teeth is G2) planet gear meshed be G1, meet reduction speed ratio

IG=1/ (1-G2 G3/G1 G4)＜0 is that G2 G3/G1 G4＞1 makes the switched in opposite of input output; And the tooth number Z 4 of the output inner gear of forward speed reducer, the planetary number of teeth that is engaged with is Z3, and the number of teeth of fixed annulus is Z2, and the planetary number of teeth that is engaged with is Z1, meets reduction speed ratio

It is identical that IZ=1/ (1-Z2 Z3/Z1 Z4)＞0 is that Z2 Z3/Z1 Z4＜1 turns to input output, and, satisfy Z2 Z3/Z1 Z4+G2 G3/G1 G4  2 and make little the arriving of difference of absolute value of IZ and IG, an equipment rebuilding phase at the most in the speed reducer lifetime, the relative rotation angle of the speed reducer output shaft that the difference accumulative total of this reduction speed ratio absolute value causes still in the scope that work mechanism allows, obtains the reverse sync deceleration unit that operating mode allows.

2. reverse sync deceleration unit according to claim 1 is characterized in that: the difference of the reduction speed ratio absolute value of forward speed reducer and reverse speed reducer is zero, satisfies Z2 Z3/Z1Z4+G2 G3/G1 G4=2, and IZ=-IG.

3 reverse sync deceleration units according to claim 1, it is characterized in that: number of teeth difference ZD and GD meet Z2-Z1=Z4-Z3=ZD, G4-G3=G2-G1=GD, and Z1＞Z3 and G3＞G1 are arranged.

4 reverse sync deceleration units according to claim 3 is characterized in that: Z3=G1, Z4=G2, ZD=GD, and when (IZ+1) Z3ZD/ (IZZD-Z3) when being integer G3 equal this integer, and G4=G3+GD.

5 reverse sync deceleration units according to claim 1, it is characterized in that: at least 1 reverse speed reducer is the two interior engagement fewer differential teeth planetary decelerators of double-layer gear, the throw of eccentric of the eccentric shaft part of itself and input shaft 5 one is e, support internal layer planetary pinion 1 through planetary bearing on the eccentric shaft part, the internal layer planetary pinion 1 coaxial outer planetary pinion 3 that is connected, in, outer planetary facewidth center line is A-A, both its facewidth was B/2 in center line A-A both sides, planetary bearing also is symmetrical for center line A-A, and outer planetary pinion 3 suffered positive moment of torsion engagement tangential forces and internal layer planetary pinion 1 suffered reaction torque engagement tangential force big portion for planetary bearing are offset; Input shaft 5 be through left side input bearing 51 and right input bearing 52 be supported on left cover and with the output shaft of output inner gear 4 one in, be fixed with equilibrium block on the input shaft; Internal layer planetary pinion 1 and fixed annulus 2 engagements, outer planetary pinion 3 and output inner gear 4 engagements; The internal diameter of outer planetary pinion 3 is than more than the big 2 times eccentric distance e of the external diameter of fixed annulus 2, to guarantee the two not grazing in the planetary motion.

6 reverse sync deceleration units according to claim 1, it is characterized in that: also have left and right synchronous sprocket wheel 17,18 to be installed in respectively to be connected on the input shaft of left forward speed reducer 120 and right oppositely speed reducer 16 and with chain the input shaft of forward and reverse speed reducer is rotated in the same way with speed, finish synchronously at input end.

7 reverse sync deceleration units according to claim 6, it is characterized in that: forward and reverse speed reducer is by motor driving, the output shaft of forward and reverse speed reducer connects the mutual counter-rotational left and right stirring shaft of stirrer respectively, or connect the mutual counter-rotational Kun of rolling of rolling mill respectively, or connect sugar-cane press respectively or press the mutual counter-rotational rolling element of machineries such as sugared machine or grinding machine or plastic extruder or shredder or feeding, conveying mechanism.

8 reverse sync deceleration units according to claim 1, it is characterized in that: reverse speed reducer wherein is to be to be fixed with the driven gear (number of teeth is ZG2) that a pair of external gear pump is paid on the input shaft of the forward speed reducers of engagement in IG2 two by reduction speed ratio, and the input end of the reverse speed reducer of the driving gear that external gear pump is paid (number of teeth is ZG1) conduct constitutes, be fixed with the number of teeth on the input shaft of driving gear that external gear pump is paid and forward speed reducer (reduction speed ratio is IZ) respectively coaxially and be the synchronous sprocket wheel of ZCG and ZCZ and be connected, and meet with chain

ZCGIG2ZG2/ZG1=ZCZIZ rotates the output shaft reverse sync of forward and reverse speed reducer.