CN2283758Y - Same force face mixed small tooth differential epicyclic transmission device - Google Patents

Abstract

The utility model belongs to a mechanical transmission device. The scheme is proposed to overcome the problems of the structure and the art which exist in the same force face epicyclic transmission device in the prior technology. The same force face mixed small tooth differential epicyclic transmission device is composed of a fixed gear, an epicyclic gear, an output gear, a gear wobble shaft, a double balance block and a case. The scheme is characterized in that the acting force or the resultant force of two gears of the epicyclic wheel is acted in the same vertical plane on the shaft, and every gear adopts the different modulus. The two gears on the epicyclic wheel can be concentrical outer gears, concentrical inner teeth, concentrical outer teeth or three parallel outer gears. The design can be disparted into three segments according to the transmission ratio. Proved by the running of the developing products, the same force face mixed small tooth differential epicyclic transmission device has the advantages of large transmitting ratio coverage range, stable performance, long service life and good artwork.

Description

With power face mixed few difference planetary transmission

The utility model belongs to mechanical transmission device, and it is specifically related to a kind of structure of planet cage of novel same power face mixed few-differential.

Planetary transmission case is a kind of prior art in the mechanical transmission.Through picking up Suo Zhi, US3451290 " tape spool is to the transmission device of overlapping gear " is a kind of planetary driving device that typically lacks the tooth difference with the power face, its feature is as follows: it is arranged in (1) two gears on the planet wheel in the same plane, the opposite characteristic of direction of utilizing input gear pair and output gear to pay the planet wheel active force, two power are cancelled out each other, can reduce the force-bearing situation of less-tooth-difference planetary transmission significantly; (2) because of two-stage gear pair axial overlap, the axial arm of force of two power is zero, has fundamentally overcome the damaging influence of high speed shaft tilting moment to bearing; (3) it has used two equilibrium blocks in the both sides of eccentric shaft planet wheel, and the barycenter of planet wheel assembly is dropped on the axis of input output, has realized dynamic balancing.But it yet comes with some shortcomings: (1) is because this patent is to start with from the overlapping of structure in design purely, only pay attention to the tooth difference with the identical characteristics that can overlapping arrangement of the throw of eccentric of modulus, thereby be restricted or velocity ratio is bigger or require to be difficult to promote the use of in the closeer mechanism of velocity ratio configuration at radial dimension; (2) when velocity ratio (i＜20) less than normal, because of cost-effectiveness ratio is high not ideal enough relatively; (3) two gears on its planet wheel all are external tooths, can only be assembled into one again after the processing respectively, the concentricity of two gears is difficult points, particularly should few tooth difference transmission interfere if will avoid, must adopt normal shift or ultrashort toothing, realize that good engagement is higher to the technological requirement of system.

The purpose of this utility model is on the basis with power face less-tooth-difference planetary transmission, in each gear pair, adopt different moduluses, form epicyclic transmission mechanism, be divided into three sections by range of transmission ratio with power face mixed few-differential, keep the advantage of aforementioned patent, and overcome its shortcoming effectively.

By as above design, the same power face mixed few difference planetary transmission that this programme proposed includes fixed gear, planetary pinion, output gear, eccentric shaft, two equilibrium blocks, and housing, it is characterized in that in its active force or the same vertical surface of force action on it of input and output gear of planet wheel, and each gear that transmission is paid can adopt different moduluses, its planet wheel that is contained on the bent axle is two concentric external gears, the small gear of this planet wheel is meshed with the internal gear of fixing, other gearwheel is meshed with the big internal gear of output, two equilibrium blocks are positioned at the both sides of planet wheel, constitute one speed reducer.

Planetary driving device in this programme is three segmentations by the distribution of velocity ratio: 1. the small gear of its planet wheel is meshed with the internal gear of fixing, other gearwheel is meshed with the big internal gear of output, two equilibrium blocks are positioned at the both sides of planet wheel, constitute one speed reducer.If its fixing internal gear greater than the internal gear of output, then constitutes the retarder of another kind of velocity ratio.2. two of its planet wheel gears are a concentric internal gear and external gear.The internal gear of its planet wheel is meshed with the small gear of fixing, and its external gear is meshed with the big internal gear of output, constitutes the retarder of the moving ratio of another superiority.3. its planet wheel is installed by three external gear symmetries and is formed, the parameter of two gears of its outer end is identical, and be meshed with two fixing internal gears, the external gear in the middle of it is meshed with the internal gear on being fixed on shell, formation one retarder from the shell outputting power.Gearwheel in its planet wheel is meshed with fixed annulus on being fixed on shell, and the gear at the planet wheel two ends internal gear of the output identical with two shapes respectively is meshed, and can constitute the retarder to two ends output.

Adopt this programme can embody following superiority: 1. in the same vertical surface that input power on two the segmentation planet wheels in this programme and ouput force act on axis, tilting moment on making axially is zero, in the 3rd segmentation, its input and output also be positioned at same plane with joint efforts, also making axial tilting moment is zero, the life-span that can improve planet wheel bearing greatly; 2. on each bent axle of this programme and on the both sides of planet wheel equilibrium block being housed symmetrically all, guaranteeing that the barycenter of planet wheel assembly drops on the axis of input output, make it to realize static balancing and even balance, also is to improve the complete machine working stability and the important measures in life-span; 3. this machine can adopt modulus, the different mixed few-differential form of tooth difference in input and output level gear pair, but must satisfy the long-pending M1 of the being Δ Z1=M2 Δ Z2 of tooth difference and modulus, guarantee that its throw of eccentric equates that the coupling of mixed few-differential can realize the requirement of wideer velocity ratio; 4. the planetary driving device of this programme can be realized the covering of extremely wide velocity ratio, and good working stability and life-span are arranged again, so its suitable various working condition requirement, is convenient to promote the use of.

Fig. 1 is the structural drawing of the same power face less-tooth-difference planetary transmission in the prior art.

Fig. 2 is the stressing conditions schematic representation of preceding patent.

Fig. 3, Fig. 4 are this patent first segmented structure schematic representation.

This patent second segmented structure schematic representation on Fig. 5, Fig. 6.

Fig. 7, Fig. 8 are this patent the 3rd segmented structure schematic representation.Fig. 7 is end input, and from the structural representation of the retarder of shell outputting power, Fig. 8 is the structural representation of the retarder of end input two ends output.

Fig. 9, Figure 10, Figure 11 are respectively the structural drawing of the same power face mixed few difference planetary transmission retarder of three segmentations of this patent.

The embodiment of existing accompanying drawings this programme.The transmission device of each scheme all by fixed gear (1), planetary pinion (2), output gear (3), eccentric shaft (4), two equilibrium block (5), and housing (6) formed.The design guarantees making a concerted effort of external force and planet wheel and eccentric shaft is not formed the tilting moment and the dynamical balancing inertia couple of engagement, and these external force that act on the same stiff member are cancelled out each other, reach the minimum of making a concerted effort, to obtain best performance and life-span.The design is divided into three sections by the distribution of velocity ratio:

(1) the moderate section of velocity ratio, i.e. i=20～100 are as Fig. 9.It adopts two gears of planet wheel to overlap on the face, on the gear that two pairs of transmissions are paid, can adopt same modulus, with choosing different moduluses and different tooth differences outside the tooth difference respectively, form the mixed few-differential transmission combination, can enlarge range of transmission ratio and density, under same structure, diameter condition, can match more practical and effective velocity ratio scheme, can adapt to the requirement of difference in functionality transmission device.When selecting mixed few-differential for use, must guarantee that the input stage planetary pinion pays the throw of eccentric that the output stage planetary pinion pays and equate.

(2) close steps section, i.e. i＜20 are as Figure 10.It is suitable for planet wheel input, output stage are adopted the internal tooth in same plane and the structure of external tooth respectively, although the contact points of two pairs of gear pairs lays respectively at the both sides of eccentric shaft, the engagement tangential component that both direction is identical is added on the planet wheel bearing fully, but they are positive pressure, and nothing is toppled and suppressed the strength phenomenon.Its advantage is the few and good manufacturability of other number of packages amount.The interior external tooth of this planet wheel can be finished processing in once being installed, can improve the quality and reduce cost its be particularly suitable for loading various operating mode mechanism of lighter, middle close steps.

(3) especially big velocity ratio section is as Figure 11.Its suitable planet wheel scheme of selecting three row's individual layer series connection external tooths for use, its two ends ring gear and middle ring gear are respectively the input and the output stage of planet wheel, because the two ends ring gear is identical, and to center tooth ring symmetry, so what the internal gear that is engaged with affacted active force on the planetary external gear must be positioned at same power plane with the suffered engaging force of middle outer tooth ring with joint efforts, planet wheel shaft honour planet wheel counter-force make a concerted effort and the centrifugal inertia force of planet wheel rotation naturally also in this plane, therefore, this three planet wheels just planet wheel with single overlapping setting are the same, can greatly alleviate the stressed of planet wheel bearing, add identical equilibrium block at the two ends of eccentric shaft, can make the input shaft strength be in the optimum state, can be applicable to various rotating speed operating modes.Input and output stage gear are got the mixed few-differential collocation, can obtain more velocity ratio matching scheme.This three planetary input stage and the output stage number of teeth can be done very approachingly, can realize great velocity ratio span, and when the number of teeth of the two was identical, theoretic velocity ratio can reach infinity, in fact can accomplish i=9～10000.End input shown in Figure 11 is applicable to capstan winch, motorized pulleys etc. by the scheme of the shell output of rotation.But the scheme of two ends shown in Figure 8 output is applicable to machineries such as pumping unit.

The front with the formal description of retarder principle of the present invention and embodiment.If in fact the input and output level is exchanged, can form a kind of good accelerator.If with input shaft of speed reducer directly and motor link, form a kind of good slowspeed machine again, can further reduce volume and reduce cost.

The part trial product of this programme proves through operation test: it has the gearratio coverage The advantage of greatly, stable performance, machine life height, good manufacturability.

Claims (7)

1. one kind with power face mixed few difference planetary transmission, it includes fixed gear (1), planetary pinion (2), output gear (3), bent axle (4), two equilibrium blocks (5), and housing (6), it is characterized in that in its active force or the same vertical surface of force action on it of input and output gear of planet wheel, and the gear that each transmission is paid can adopt different moduluses, its planet wheel that is contained on the bent axle is two concentric external gears, the small gear of this planet wheel is meshed with the internal gear of fixing, other gearwheel is meshed with the big internal gear of output, two equilibrium blocks are positioned at the both sides of planet wheel, constitute one speed reducer.

2. according to the described planetary driving device of claim 1, it is characterized in that the internal gear of its fixing internal gear, then constitute the retarder of another velocity ratio greater than output.

3. according to the described planetary driving device of claim 1, it is characterized in that its planetary two gears that are contained on the bent axle are a concentric internal gear and external gear.

4. according to claim 1 or 3 described planetary driving devices, it is characterized in that the internal gear of its planet wheel is meshed with the small gear of fixing, its external gear is meshed with the big internal gear of output, constitutes retarder.

5. according to the described planetary driving device of claim 4, it is characterized in that the external gear of its fixing internal gear, then constitute the retarder of another velocity ratio greater than output.

6. according to the described planetary driving device of claim 1, the planet wheel that is contained on the bent axle that it is characterized in that it is made up of the installation of three external gear symmetries, the parameter of two gears of its outer end is identical, and be meshed with two fixing identical internal gears, external gear in the middle of it is meshed with the internal gear on being fixed on shell, constitutes a retarder from the shell outputting power.

7. according to the described planetary driving device of claim 6, it is characterized in that the gearwheel in the middle of its planet wheel is meshed with internal gear on the set casing, the gear at the planet wheel two ends internal gear of the output identical with two shapes respectively is meshed and can constitutes the retarder of exporting to two ends.

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