Wave drive

FIELD: machine building.

SUBSTANCE: invention can be used in the capacity of drives for automation of products from aircraft and rocket engineering. Wave drive contains casing (1) located in it double-beat output shaft (2) wave toothed gear (3), with flexible (4) and rigid (5) wheels, waves generator (6) located inside the flexible wheel and through intermediate reducer (8) connected to shaft (8) of electric motor (10). The first end (11) of output shaft (2) is installed on support (12) located in casing. Rigid wheel (5) of wave toothed gear is rigidly fixed on casing (10). Flexible wheel (4) is connected to output shaft (2). In output shaft it is implemented cavity (15) inside which it is installed electric motor. The second end (16) of the output shaft is installed on rest (17) located in counterbore (18) of wave generator which is common support and for waves generator. The rest (12) of the first end (11) of the output shaft is fixed in axial direction as relative to output shaft as relative to casing.

EFFECT: invention provides design simplification and reduction of mass.

1 dwg

 

The invention relates to machine tools and can be used in the composition of the products of aviation and rocketry.

Known wave actuator, comprising a housing that holds the motor and wave transmission, wave generator which is connected with the motor shaft through the intermediate gear [1]. The disadvantage of this wave actuator is significant axial dimensions caused by the sequential arrangement of the output shaft and the wave transmission.

This lack deprived selected as a prototype wave actuator, comprising a housing, placed in it two output shaft, the wave gear with flexible and rigid wheels, and placed inside a flexible wheel wave generator, through an intermediate gear connected to the shaft of the motor [2]. Each end of the output shaft mounted on a support placed in the enclosure. The wave generator is located in the housing on its support.

The disadvantage of this wave actuator design is the complexity and large mass, which is caused by the presence of two large-size bearings of the output shaft and bearing of the wave generator. In terms of aviation and especially rocket excessive weight is highly undesirable, because of the high unit cost of output of cargo into orbit.

Task claimed izaberete the Oia is to develop such a wave actuator, which was achieved simplifying the design and reducing the weight of the drive.

The technical result is achieved due to the fact that in the known wave actuator, comprising a housing, placed in it two output shaft, the wave gear with flexible and rigid wheels, and placed inside a flexible wheel wave generator, through an intermediate gear connected to the shaft of the motor, the first end of the output shaft mounted on a support placed in the enclosure, according to the invention a rigid wheel of the wave gear rigidly mounted on the housing, and a flexible wheel is connected with the output shaft, the output shaft is made hollow, the motor installed inside, and the second end of the output shaft installed on a support placed in the bore of the wave generator, which is General support for wave generator, while bearing the first end of the output shaft is fixed in the axial direction relatively to the output shaft and relative to the housing. One supports the output shaft for wave generator reduces the number of bearings and to simplify the design and reduce the weight of the wave drive.

The drawing shows a specific example of the wave drive, longitudinal section.

Wave actuator includes a housing 1, it is vuhorny output shaft 2, wave gear 3 with a flexible 4 and hard 5 wheels. Inside the flexible wheel 4 posted by Cam wave generator 6 with the bearing 7 with flexible rings (so-called flexible bearing), through the intermediate gear 8 is associated with the shaft 9 of the electric motor 10. The first end 11 of the output shaft 2 mounted on a support 12, accommodated in the housing 1. Hard wheel 5 wave gear 3 is rigidly fixed to the body 1 by means of pins 13, and the flexible wheel 4 is connected with the output shaft 2 through a splined coupling 14. In the output shaft 2 has a cavity 15, the motor 10 is installed inside of it. The second end 16 of the output shaft 2 mounted on a support 17, is placed in the bore 18 of the wave generator 6, which is a common means of support for wave generator 6. This bearing is made in the form set next to each other of the two bearings 19, which improves the working conditions of the bearings due to better perception of the bending moment from the wave generator 6, but can be used bearing in the form of one bearing, as in the prototype. Consequently, the claimed indication, the generic term "bearing", which means as the one bearing (as in the prototype), and two (in the above example of a specific implementation). Bearing 12 of the first end 11 of the output shaft 2 is fixed in the axial direction relatively to the output shaft 2 to its shoulder 20 and mounted on the outer surface of the output shaft 2 by a spring ring 21, and relative to the housing 1 by his shoulder 22 and mounted on the inner surface of the housing 1 by a spring ring 23.

Wave actuator operates as follows: when the motor 10, the rotation of the shaft 9 through the intermediate gear 8 is transmitted to the wave generator 6. The wave generator 6, rotating on a support 17, his bearing 7 deforms the flexible wheel 4 and introduces it into engagement with the rigid wheel 5 and drives the flexible wheel 4 and through the splined coupling 14 to the output shaft 2 rotating in the bearings 12 and 17. The axial position of the wave generator 6 is provided by installing it on a support 17, and the bearing 7 can (within thermal deformation of the housing 1 to move in the axial direction along the smooth inner surface of the flexible wheel 4. This eliminates potential interference fit between the supports 12 and 17 and provides their normal working conditions. When this bearing 17 maintains its alignment with the housing 1 due to the fact that the deformed flexible wheel 4 is rigidly based multi-pair by engagement of its teeth with the teeth of the rigid wheel 5, and the alignment of the wave generator 6 flexible wheel 4 is provided that the outer surface of the bearing 7 is in surface contact with the inner surface of the flexible wheel 4, and the inner with the outer surface of the wave generator 6. Possible deviation of the axis of the flexible wheel Rel is relatively hard axis with the condition of mnogodelnosti gearing theoretically lies within the lateral clearance of the teeth in the wave gear. The maximum lateral clearance δ in gears is usually in the range of 0.2 mm [3]. Therefore, for maximum estimate the shift flexible wheel relatively hard you can accept this value, although in reality due to mnogodelnosti gear shift flexible wheel is substantially less. However, based on the evaluation of the radial displacement of the flexible wheel relatively rigid inflated the value of δ=0.2 mm, when the distance between the supports 12 and 17 L=100 mm, we find that the radial displacement of the flexible wheel (and hence wave generator 6) δ=0.2 mm will cause angular rotation (skew) of the output shaft 2 relative to the housing 1 angle:

A=δ/L=0.2/100=0,002 [happy]≈0,114°=6,84'.

The specified bias of the output shaft does not cause deterioration of the supports 12 and 17, as in the case of use as bearings radial ball bearings misalignment of the inner ring relative to the outer does not exceed the accepted values in 1/4°=15' [4]. In relation to installed on the shaft load, the distortion of the output shaft also is not critical, as between the shaft wave actuator shaft and actuator, generally set the compensating coupling for compensating coaxial ties and angular misalignment. The combination of all these essential features eliminates the specialists is inuu support wave generator due to its alignment with the support of the output shaft, to simplify the design and reduce the weight of the wave drive.

These advantages allow us to recommend the claimed actuator for use in aggregates of aviation and space technology.

Literature:

1. Eggenburg, Wave gears, L., engineering, 1969, str, RES.

2. USSR author's certificate No. 1089325, IPC: F16H 1/00, 1984 prototype.

3. Elavin "Handbook of designer precision instruments, Meters, machinery, 1964, str, tabl.

4. Ibid, str.

Wave actuator, comprising a housing, placed in it two output shaft, the wave gear with flexible and rigid wheels, and placed inside a flexible wheel wave generator, through an intermediate gear connected to the shaft of the motor, the first end of the output shaft mounted on a support placed in the housing, characterized in that the rigid wheel wave gear rigidly mounted on the housing, and a flexible wheel is connected with the output shaft, the output shaft is made hollow, the motor installed inside, and the second end of the output shaft mounted on a support placed in the bore wave generator that is a common means of support for wave generator, while bearing the first end of the output shaft is fixed in the axial direction relatively to the output shaft, and otnositel the body.



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: invention relates to drives and can be used as a drive with stepless RPM and torque control. Proposed electric drive comprises motor (1), motor RPM control system and planetary plate-type friction speed variator (2). Adaptive variator (2) comprises RPM pickup (5) with counter (4) on output shaft (3). Pickup (5) is connected to motor RPM controller (6).

EFFECT: higher torque and electric drive overload endurance, better dynamic properties and higher efficiency in low load range.

11 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: gear transmission contains driven wheel, teeth (2) of which are implemented with plane work surfaces (3) and, drive wheel, teeth (5) of which are implemented with convex work surfaces (6), joined to plane work surfaces (3) by line of engagement, corresponding part "Pascal's limacon".

EFFECT: reliability growth ensured by accurate gearing of teeth.

2 dwg

FIELD: machine building.

SUBSTANCE: device for transformation of motion consists of screw, casing with covers and thread rolls. Thread rolls with ends installed in casing with ability of rotation around its axis and allows cylindrical threaded surfaces engaged to screw. At ends of each thread roll there are implemented spherical projections centres of which are located on axis of roller. At each cover there are implemented spherical angular clearances centres of which are also located on axis of corresponding roller. Additionally radius of spherical angular clearances in covers for 2-3% more than radius of spherical projections implemented on corresponding to it ends of each threaded roll. Device is outfitted by two pins which are provided for angular attitude of covers relative to casing.

EFFECT: increasing of output capability and durability of device, decreasing of its overall dimensions.

3 cl, 5 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering and can be used, particularly in transmission of vehicles, in the first place, cars. Multiplate planetary variator contains carrier (11), consisting of two sidewalls, connected by cylindrical tension buckle (10) by number of planetary gear (5) in row, got on by several rows with ability of rotation on axis (6), rigidly fixed between ends of extreme pivot rods (7), other ends of which, as a minimum, one group form them, located at one of sidewalls of carrier (11), are controlled and its movement it is regulated advantage of variator. Middle parts of extreme revolute arms (7) are connected to each other by pipes (9), inside of which there are located cylindrical tension buckle (10) of carrier (11) with ability of reciprocal rotation. Pipes (9), on which there are fixed revolute arms (7) and axis (6) of planetary gears (5) between its rods are rigidly connected by blackets. Revolute arms (7), its ties, blackest and axis of planetary gears form rigid system, but with ability of total or partial disassembling.

EFFECT: providing the ability to resist by dangerous bending stress and huge caving in of planetary gears with several rows of planetary gears on it, appearing at high rotating frequency of carrier, and also toughening junction by tension buckles of sidewalls of carrier at transferring of high rotational moments.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to mechanisms for transmission of rotation for several executive boards. Transmission of multispindle machinery contains rotary, movable connected driving (1) and three more driven sections (2, 4) with spindle and intermediate body (3) in the form of rigid ring. All sections (1, 2, 4) are located round a circle of intermediate body (3) and are installed either inside, or inside or outside, or only outside of it, and are implemented with ability of interaction by its contact areas to corresponding contact areas of intermediate body (3). Part or all drive sections (2, 4) and communicating to them contact areas of intermediate body are implemented in the form of rollers or in the form of tooth gears. Intermediate body (3) is implemented with removable flanges at both butts, projections of which partly overlap sections (1, 2, 4) in contact area and bear on its butts.

EFFECT: invention provides enriches functionality, simplify implementation of transmission with many of spindles, rotating as into one as into different directions, with equal or unequal rates with high transmitted forces.

7 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building and can be implemented, for example in transport machine building as continuously variable transmission. The two-mode super variable speed case consists of case (1), base step-less transmission (2), and control mechanism (11) including matching planetary (12) and differential (13) gears; it also consists of output shaft of drive (27) designed to alternate kinematic connection with kinematic links of the control mechanism. Matching planetary gear (12) can be kinematically connected either with carrier (23) or with external central wheel (21) of differential gear (13). Internal central wheel (20) of differential gear (13) can be connected with output kinematic link (9) of base step-less transmission (2). External central wheel (15) of matching planetary gear (12) is connected with input kinematic link (9) of base step-less transmission (2). Internal central wheel (15) of matching planetary gear (12) is connected with fixed case (1). Output shaft of drive (27) can be connected either with external central wheel (21) or with carrier (23) of differential gear (13). The second version differs from the first one like follows: output kinematic link (9) of base step-less transmission (2) is connected to the external central wheel (21) of differential gear (13), while internal central wheel (20) contains singular tooth ring (22). The third version of the drive differs from the first two like follows: output kinematic link (9) of base step-less transmission (2) can be telescopic jointed to fixture (3 8) by means of splines (40); the fixture bears tooth ring (41) of internal mesh.

EFFECT: invention transmits torque with reduced revolution frequency from input kinematic link of step-less transmission to output link of drive which simplifies drive, increases its efficiency and eliminates high intermediate frequencies of control mechanism rotation.

9 cl, 6 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be sued in automotive stepless transmissions. Proposed variator comprises inner (1) and outer (2) central friction disks coupled with drive shaft (13) and planetary mechanism annular ring (8), comprising satellite gears (6) fitted on axles (17) in pinion frame (18) articulated with variator output shaft (19). Disks (1) and (2) are coupled with shaft (13) and annular ring (8) via rolling bearings (14) fitted in inclined grooves (15) and (16) made in disks-stops (11) and (12) fitted on shaft (13) and annular ring (8), as well as in adjoining inner (1) and outer (2) central friction disks.

EFFECT: higher efficiency in wide range of torques.

8 cl, 14 dwg

FIELD: machine building.

SUBSTANCE: variable-speed drive unit comprises master and slave toroidal wheels (2, 3) and roller (6). Their generatrices are made in the form of convex and concave curved surfaces. Due to arrangement of generatrices of working surfaces in master and slave elements in accordance with a certain dependence, area of friction pairs contact is increased.

EFFECT: improved kinematic characteristics of variable-speed drive unit.

3 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: housing (1) accommodates high-speed shaft (4) and low-speed shaft (5) aligned with the former. Disk (16) with driving wheels (18, 19) is fitted on eccentric (8) of shaft (4). Driven wheel (11) comprises rollers (13) in mesh with teeth of gear wheels (18, 19). The latter are fitted on disk (16) with the help of pins (17), each having its second end entering the off-center opening in washer (20) arranged to rotate in housing (1). Eccentricity range equals the distance between centers of driving and driven wheels. With shaft (4) rotating, not gyrating disk (16) and wheels (18, 19) effect orbital motion and interact with rollers (13) to rotate driven wheel (11) and shaft (5) fitted thereon. Additionally, five design versions of proposed reduction gear are covered.

EFFECT: increase power transfer, noiseless and reliable operation.

15 cl, 14 dwg

FIELD: machine building.

SUBSTANCE: plunger-type reduction gear comprises fixed rigid gear wheel (1), wheel representing wheel-separator (3) with its groove housing prismatic plungers (2) to move radially therein. Undeformable ring (5) is fitted in the grooves of plunger (2). Wave generator represents shaft (6) with the disk fitted off-center thereon.

EFFECT: longer life.

2 dwg

Planet gear // 2244181

FIELD: mechanical engineering.

SUBSTANCE: planet gear has input shaft with eccentric , race, and satellites.

EFFECT: improved design.

2 cl, 8 dwg

FIELD: mechanical engineering.

SUBSTANCE: rolling bearings of shaft (10) are housed in eccentric sleeves (3) and (4). Sleeve (3) receives bushings (5) and (13). Sleeve (4) receives bushings (6) and (14). First bushings (5) and (6) are made of eccentric and provided with conical outer surface and radial grooves. Second bushings (13) and (14) are mating with first bushings (5) and (6) over the spherical surface whose center is on the axis of shaft (10). Additional spherical surfaces are mating with the spherical surfaces of bearing washers (15) and (16) mounted on shaft (10). Bearing washers (15) and (16) are arranged in stop nuts (17) and (18) mounted in housing (2).

EFFECT: expanded functional capabilities.

5 dwg

FIELD: mechanical engineering.

SUBSTANCE: unit comprises tree disks (1), (2), and (3) which are arranged in series along the single axis and co-operate with each other through a chain of balls (6). Each of the disks can be driving, driven, and bearing links. Intermediate disk (1) is a floating washer freely mounted on the eccentric for the interaction with balls (6) by its cylindrical side. The mating sides of disks (2) and (3) are provided with closed curved way (5) and interrupted radial grooves (4) uniformly spaced over periphery. The depth of the closed way is greater than the radius of ball (6). The cross-pieces of radial grooves (4) are provided with axial projections (9) in the zone of movement of the centers of balls (6). The surfaces of projections (9) are inscribed in the surface of closed way (4) with a spaced relation for providing mutual rotation of the disks.

EFFECT: enhanced reliability.

4 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in drives of high-accuracy machines and mechanisms. Proposed transmission contains high-speed shaft 1 and slow-speed shaft 2, eccentric 3, stationary central wheel 9 with internal shaped profile, holder 7 with radial slots, roller intermediate links 8 placed in slots, cam 4 and additional cam 10. Cam 4 with shaped profile on outer surface is installed on eccentric 3 of high-speed shaft 1 through antifriction bearing and is in mechanical contact with roller intermediate links 8. Additional cam 10 is rigidly coupled with slow-speed shaft 2 and is turned relative to cam 4. Number of lobes of cam 4 is equal to number of lobes of additional cam 10 and differs from number of roller intermediate links 8.

EFFECT: reduced weight, axial dimensions and unbalance of transmission.

2 cl, 2 dwg

Gear mechanism // 2250340

FIELD: mechanical engineering.

SUBSTANCE: rotor axis of gear mechanism, performing a planetary movement, is displaced relatively to stator axis for distance of engagement eccentricity. As source auxiliary contour ellipse is used, while proportional coefficient k, determining radius of guiding circle, is taken equal to half necessary number of teeth z of wheel (k = z/2), optimal shape of its teeth is provided by rational combination of ellipse shape coefficient λ, equal to relation of lengths of its semi-axes and eccentricity coefficient of auxiliary contour, in form of relation of length of greater ellipse semi-axis to rolling circle radius, while inner and outer profiles are made in form of elliptic profiles from common ellipse contour.

EFFECT: simplified manufacture.

3 cl, 11 dwg

Reduction gear // 2250398

FIELD: mechanical engineering; summing-up rotary motion from several shafts.

SUBSTANCE: proposed reduction gear has housing 2 with covers 1, detachable horizontal shafts 5 and vertical shafts 10 and 11 with gears 7 and 9. Housing 2 is provided with cavities 6 for gears 7 with holes 3 and mounting seats for horizontal shafts 5 and mounting seats for vertical seats 10 and 11 in center of housing. Mounting seats for vertical upper shaft 11 and lower shaft 10 are made in centers of covers 1. Shafts 5 are located symmetrically and they are diametrically opposite relative to circle. Gears 9 of vertical shafts 10 and 11 are thrown into engagement with all gears 7 of horizontal shafts 5.

EFFECT: summing-up rotation of several quick revolving shafts into rotary motion of two shafts at low angular velocity.

2 dwg

FIELD: mechanical engineering.

SUBSTANCE: two-speed planet cycloidal reduction gear comprises housing (1), cover(2), input shaft (1), output shaft (18), corner eccentric of the first gearing, satellite pinion (5), and central pinions (4) and (7), pinion (7) being movable. All the pinions are mounted on output shaft (1) via bearings (9), (19), and (20). Satellite pinion (5) is made of a spring whose turns have a round concave profile. Central pinions (4) and (7) are made of springs the turns of which have round convex profile and which are welded to define a single structure. The number of teeth of all pinions differ from these of adjacent pinions, and from their left and right sections by the unit.

EFFECT: expanded functional capabilities.

8 cl, 3 dwg

FIELD: instrument industry.

SUBSTANCE: electric drive comprises first and second electric motors, planet gearings, and differential. Stators (5) and (6) of the electric motors are secured to housing (2) of the electric drive. Shaft (7) of rotor (3) of the first electric motor is mounted on base (1) and is connected with central pinion (16) of the differential through a clutch. Shaft (10) of rotor (4) of the second electric motor bears on shaft (7) of rotor (3) and is connected with the hollow central pinion (17) of the differential through a clutch. Central pinion (16) is mounted in the space of central pinion (17) and engages satellites (19). Satellites (19) engage satellites (21) in pair. Central pinion (16) is interposed between two spherical bearings (22) and (23). Carriers (20), (27), and (30) of the differential and first and second planet gearings are made in block with central pinions (25), (29), and (33) of the first, second, and third planet gearings, respectively. Satellites (26) and (32) engage common gearing wheel (34) which is secured to housing (2). Carrier (37) of the planet gearing is made in block with output shaft (40). First (42), second (43), and third (44) supports are interposed between central pinions (25), (29), and (33) and carriers (27), (30), and (37), respectively.

EFFECT: simplified manufacturing and assembling of the electric drive.

cl, dwg

FIELD: mechanical engineering.

SUBSTANCE: planet gearing mechanism comprises shaped gear rack (9), base (1) with guides for longitudinal movements of the rack, rotatable lever (5) with gear wheel (4), and driving gear wheel (10). Shaped rack (9) has guides with flat (7) and profiled surfaces (2) and (8). The axis of rotation of wheel (10) passes through shaped rack (9), is in coincidence with the axis of rotation of lever (5), and transmits motion to shaped rack (9) through gear wheel (4) of rotatable lever (5). Rotatable lever (5) has bearings (3) and (6) which move individually over flat (7) and profiled (2) and (8) surfaces of rack (9).

EFFECT: simplified structure.

2 dwg

Gearbox // 2253774

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in step gearshift mechanisms. Proposed gearbox has input shaft 1 and output shaft 2 installed in housing 3, differential transmitting modules and gearshift members. Each transmitting module contains three members, namely inlet one 4-7, outlet one 12-15and intermediate one 8-11. Modules are series-connected so that inlet member of following module is connected with outlet member of preceding module. Input shaft 1 of gearbox is connected with inlet member 4 of first module. Output shaft 2 of gearbox is connected with outlet member 15 of last module. Control members are made as shifters 16-19 connecting intermediate member of each module either with housing 3, or with its outlet member.

EFFECT: simplified design of gearbox owing to increased number of speed at the same number of transmitting modules.

4 cl, 2 dwg

Up!