CN201027913Y

CN201027913Y - XB pendulum small tooth difference driver

Info

Publication number: CN201027913Y
Application number: CNU2006201322022U
Authority: CN
Inventors: 范又功; 李济民
Original assignee: Beijing Huaneng Tongda Energy Sources Science & Technology Co Ltd
Current assignee: Beijing Geo-Vista Technology Ltd.
Priority date: 2006-08-11
Filing date: 2006-08-11
Publication date: 2008-02-27
Anticipated expiration: 2016-08-11

Abstract

A XB planetary cycloid teeth difference driver consists of a planetary eccentric shaft component (1) wheel gear (2), a rigid gear (3), a bearing (4), a front end cover (5), a bolt (6), a top cover (7), an output flange (8) and a sun gear (9). The utility model is characterized in that the eccentricities of three uniformly distributed planetary eccentric shaft components (1) synchronously compound an eccentric small inertia mechanism round a gyration center, and the teeth meshing pairs of three components are of involute shape. The utility model has the advantages of small volume, weight, backlash and inertia and high precision, speed ratio, load and efficiency. The rapidity (small rotating inertia), stability (small backlash and high torsional rigidity) and accuracy (high motion precision) of the system are all increased by one order of magnitude.

Description

XB is capable to put little tooth difference driver

Affiliated technical field

It is a kind of mechanical transmission that the utility model relates to. it can be widely used in space flight, aviation, in the mechanical transmission on navigation and land. especially it is to have four little (volume is little, weight is little, sideshake is little, and noise is little) and four height (highi degree of accuracy, at a high speed than, high capacity, high efficiency) driver of special performance.

Background technique

As everyone knows, present column gear transmission device, the planetary pinion driver, the cycloidal-pin wheel driver, the Harmonic Gears device will satisfy the large speed ratio small volume, the little sideshake of highi degree of accuracy, the little weight of heavy load starts requirements such as fast inertia is little and is difficult to reach.

Compact structure of the present utility model, the logarithm of engaging tooth reaches 60% to 80%., and has the characteristics of " four is little " and " four height ", and above-mentioned requirements is satisfied.

Summary of the invention

In order to overcome the deficiency of existing gear driver, to satisfy modern electromechanical compact apparatus, the more requirement of Gao Gengxin is proposed driver, and a kind of model utility driver of creation.

The utility model is little for the overall volume size, and its input is taked suit and high capacity precision bearing (short cylindrical or angular contact ball bearing) and compact structure with output shaft system; For the quality and the rotary inertia of the eccentric input shaft of the engagement pair (as the cycloidal-pin wheel transmission) that reduces eccentric three members, and take the eccentric little axle of three planets (uniform, synchronously) reach generation; In order to strengthen the logarithm of engagement pair engaging tooth, take two or three escapements, meshing of symmetry with couple gear, this has not only improved bearing capacity and has pieced together the difference effect and promptly improved transmission accuracy, and greatly reduces centrifugal force and unbalance moment that eccentric part causes; In order to improve the cog machining manufacturability of three member engagement pair, take involute work profile of tooth to substitute conjugate tooth profile, so, just can continue with involute process equipment and cutter holder measurer. just relate to here by three component movement rules and optimize meshing parameter, make its involute work profile of tooth best fit conjugate tooth profile (error of it and conjugate tooth profile can be ignored). to this, the utility model adopts the analytic geometry graphing method to finish.

The utility model beneficial effect is, it is not only than the volume of other gear driver, weight, and sideshake is all little much, and kinematic accuracy, speed ratio, load is also high a lot of; Especially in the automatic dragging system of electromechanical, it combines with executive component and feedback elements, makes the rapidity (rotary inertia is little) of system, stability (sideshake is little, and torsional stiffness is big), and accuracy (kinematic accuracy height) all is improved.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified;

Fig. 1 is a kinematic scheme of the present utility model

Fig. 2 is the structural drawing of an embodiment of the utility model

Fig. 3 is escapement wheel tooth of the present utility model and housing internal gear teeth engagement process schematic representation

Fig. 4 is transmission engagement figure of the present utility model

Fig. 5 is the path of action figure of transmission of the present utility model

1. planet eccentric shaft assemblies among the figure, 2. escapement gear, 3. housing internal gear, 4. bearing, 5. front cover, 6. screw, 7. top cover, 8. output flange, 9. sun gear

Embodiment

In embodiment illustrated in fig. 2, planet offset assembly (1), it is by planetary pinion, eccentric shaft and spouse's needle bearing is formed. and escapement gear (2), it is a fluted disc with external tooth, there are three on it with three eccentric shaft spouses' needle bearing hole and cross the via hole that (7) are overlapped on connection front cover (5) and the screw (6) and the top of output flange (8). housing internal gear (3), it is exactly a common internal gear. and in embodiment illustrated in fig. 2, precision bearing (4) is loaded on respectively on the axle journal of front cover (5) and output flange (8); In the corresponding bearing hole of planet offset assembly (1) is loaded in escapement gear (2) spouse's the bearing hole respectively and the left end of eccentric shaft is packed into output flange (8); From left end was packed housing internal gear (3) into, bearing (4) put in place, makes the tooth of escapement gear (2) and the tooth of housing internal gear (3) enter correct engagement with (1) (2) (8) combination; To push up the screw hole that cover (6) passes the corresponding via hole of escapement gear (2) and aims at output flange (8) from the other end (right-hand member), then, front cover (5) is put on screw (7) aligning penetrate the screw that top cover sword is gone into output flange (8), and bearing on the output flange (8) is put in place pack in the bearing hole of housing internal gear (3), with screw front cover (5) and output flange (8) are tightened together at last. so, output shaft system and engagement pair are implemented to finish, then (sun gear (9) is a shaftgear with input shaft system, the bearing at its two ends be contained in the bearing hole of output flange (8) and front cover (5) bearing hole interior) combine, the embodiment assembly is finished.

In transmission system shown in Figure 1, when sun gear (9) (input end) rotates, both done rotation with three uniform planet wheels of its engagement, revolve round the sun around sun gear again. so, the planet wheel time rotational, just drive is rotated synchronously with the eccentric shaft that it is connected mutually, and three eccentric shafts drive escapement gear (2), make eccentric motion with the compound eccentric wraparound commentaries on classics center of three eccentric shafts and mesh (overmask is nibbled out) with housing internal gear (3) effect, meanwhile, owing to not waiting, the escapement gear (2) and the housing internal gear number of teeth do not produce the side set motion, it is escapement gear (2) housing internal gear (3) side set relatively, side set direction and sun gear (9) turn in the same way. meanwhile, escapement gear side set movement process, the planet wheel that drives planet eccentric shaft assembly (1) revolves round the sun around sun gear (9), and is compound from phase inversion with it, and three eccentric shafts of planet eccentric shaft assembly (1) drive output flange (8) rotation output.

In Fig. 3 three members of this embodiment: the meshing relation figure of planet eccentric shaft assembly (1) and escapement gear (2) and housing internal gear (3) engagement pair. the escapement gear (2) of this embodiment differs 2 teeth with housing internal gear (3) number of teeth, therefore when planet eccentric shaft assembly (1) changes 180 °, the relative housing internal gear of escapement gear (2) tooth (3) tooth misses 1 tooth, its grind one's teeth direction and planet eccentric shaft assembly (1) switched in opposite; When planet eccentric shaft assembly (1) changes 360 °, and miss 2 teeth.

Shown in Fig. 4 being the phase diagram of this embodiment new meshing, at the eccentric biggest place of planet offset assembly, be in engagement fully, and angle is located therewith for 90 °, and full the disengagement.

Be that this embodiment is novel shown in Fig. 5, under planet eccentric shaft assembly (1) effect, the trajectory diagram of escapement gear (2) and housing internal gear (3) tooth engagement process. it is the characteristics of motion (mathematical model) according to its three members theory of engagement, how much parsing graphing methods setting up are finished. and a tooth to escapement gear (2) among the figure (complete engaging-in tooth), miss a tooth process from engaging-in fully to throwing off (planet eccentric shaft assembly (1) is by 180 ° of 0 ° of commentaries on classics) relative housing internal gear (3); Miss the trajectory diagram of a tooth process again to engaging-in fully (planet eccentric shaft assembly (1) forwards 360 ° to by 180 °) from throwing off (planet eccentric shaft assembly (1) forwards 180 ° to) again.

Claims

1. an XB is capable puts little tooth difference driver, its structure is by planet eccentric shaft assembly (1), sun gear, housing internal gear, front cover, output flange are formed, it is characterized in that: sun gear drives three uniform planet eccentric shaft assembly rotations, drive two escapement gears and do the radial symmetric swing, and mesh with the housing internal gear, the housing internal gear is motionless, the escapement gear rotates, and three planet eccentric shaft assembly bands front cover and output flange rotation simultaneously.

2. XB according to claim 1 is capable to put little tooth difference driver, and the profile of tooth that it is characterized in that escapement gear and housing internal gear is an involute work profile of tooth.