Device for transformation of rotary motion into progressive (versions)
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
The invention relates to mechanical engineering and can be used as a mechanical screw transmission for converting rotary motion into reciprocating.
Known planetary roller screws passing, see Reshetov D.N. "Machine parts", a textbook for students of engineering and mechanical specialties, 4th edition, Moscow, Mashinostroenie, 1989, str consisting of screws, nuts and installed between the threaded rollers. The rollers its mechanical tails installed in the separators. To prevent spontaneous loosening of the rollers, they are additionally connected at the ends with nut toothed gearings. The coils of the rollers are threaded links with the turns of the screw and nut. When this jet perform multiple outer thread, and the nut - internal multiple threads.
The main disadvantage of this planetary roller screws transmission is the technological complexity of manufacturing on the inner surface of the nut, hardened to a higher hardness, high-precision multiple-thread (usually five or satisfide). Mainly for this reason, the development of production of planetary roller screws gears which most operational parameters exceed other transmission to convert rotational motion of postupatel is Noah, difficult. In the world production of planetary roller screws gears mastered only a few firms.
When the threaded nut is considered the planetary roller screws transmission performs the following functions:
receives the axial force from the actuator and transmits it through the rollers of the screw:
- keeps the rollers from moving in the radial direction from the axis of the screw to the nut;
- participates in the conversion of rotary motion into reciprocating.
Known technical solutions closest to the technical nature of the claimed device is a device for converting rotary motion into reciprocating, see RF patent №2310785 "a Device for converting rotary motion into reciprocating", F16H 25/00-25/24, F16H 1/34, IB No. 32, 2007, which is selected as a prototype.
This device consists of a screw housing mounted thereto caps, threaded rollers, each of which is mounted in the housing can be rotated around its own axis, two or more rings mounted in separators of balls, the number of which is twice the number of threaded rollers and seals. When the device is, typically, the screw rotates, and the housing with the screw rollers performs translational motion. Working axial force on the device is transmitted with wines is and on the rollers due to the screw mates turns these parts, and then threaded rollers on one of the covers through the balls installed in the separator. For this purpose, the ends of each threaded roller is made of a spherical undercut, and on the inner end surfaces of the caps - ring grooves. Each ball is simultaneously set in the undercut threaded roller and the annular radial groove of the cover. When the sphere radius must be smaller than the radius of the undercut in the screw rollers and the annular groove in the cover and in this condition the ratio of these three radii can be arbitrary.
To balance the radial force acting from the side of the screw in the screw roller, the latter directly on the cylindrical threaded surface are annular grooves in which are mounted rings. To stabilize the movement of the threaded rollers, the constancy of the transfer function of the device and eliminate misalignment of the threaded rollers, the latter are connected with the casing two toothed gearings, and balls mounted in each cover, installed in the separator.
This device has the following main disadvantages.
1. The device has a low load capacity due to the low contact strength in place of the pair of the ball with an annular radial groove in the lid. It is known that the contact strength of components such with whom praganiaj depends on the ratio of principal curvatures of the parts at the point of initial contact. One of the main curvature of the specified slot is equal to the radius of its profile, and the second is equal to zero. Hence the contact area in place of the pair of the ball with the specified groove is small, and the contact stresses are high.
2. All the balls installed in the annular radial groove of the cover, also installed in the spherical undercut the various threaded rollers and, in addition, in the separator. So the ball is imposed many relationships. All these parts are made with errors. Threaded rollers, even associated toothed gearings with the body, can keep up or outrun each other when the device is. Threaded rollers warp in the plane formed by the axes of the screw and roller at different angles under the action of axial load acting on the roller. It should be noted that the total axial force transmitted from the device, unevenly distributed between the rollers. Hence the axis of the holes in the separator under the balls does not coincide with the axis of the ball, which is determined by the contact force with cap and clip. The result is a decrease in efficiency because of the additional slide in the pair of balls and cage and reducing the load capacity and durability of the device.
The objective of the invention is to increase the load capacity and durability of the device for converting rotary motion into reciprocating accounts for the increase of the contact strength in place of the pair of threaded roller or bowl with cover, and by excluding from the device separators. In addition, the proposed device is structurally simple and has smaller dimensions.
For the 1-St variant of the device, this object is achieved in that it is provided with two pins, which are designed for the angular orientation of the lid relative to the housing, the ends of each threaded roller made of spherical protrusions, the centers of which are located on the axis of the threaded roller, and each cap is made of a spherical undercut, the centers of which are also located on the axis of the respective screw clip, with the radius of the spherical pagnutti in caps 2-3% more than the radius of the spherical projections made at the ends of each threaded roller. Perhaps the performance of this device, which is equipped with two rings, which are mounted in annular grooves made on the cylindrical threaded surface of each roller, and these slots perform as close as possible to the opposite ends of the threaded rollers, cylindrical threaded surface of each roller or one of its annular grooves made hex key, and the width of the annular grooves on the threaded rollers greater than the width of the rings is not less than 1.5 to 2 thread pitch of the screw.
For the 2nd variant of the device on the threaded ends of the rollers are made with eticheskie undercut, the centers of which are located on the axis of the threaded roller, and has the balls installed in the specified podotreme threaded rollers. This object is achieved in that the device is provided with two pins, which are designed for the angular orientation of the lid relative to the body, each cover is made of a spherical undercut, the centers of which are located on the axis of the respective screw clip, with the radius of the spherical pagnutti made on the ends of threaded rollers equal to the radius of the spherical pagnutti made in the lids, the radius of the balls 2-3% less than the radius of the spherical pagnutti made in the lids, and each ball is additionally installed in the spherical undercut the cover.
The invention is illustrated the accompanying drawings, where:
- figure 1 shows a General view of the device;
- figure 2 shows a section a - a in figure 1 for the basic version of the 1-St variant of the device;
- figure 3 shows a section a - a in figure 1 for additional performances of the 1-St variant of the device;
- figure 4 shows the location B in figure 2 for the 1-St variant of the device with a higher load capacity;
- figure 5 shows the position B in figure 2 for the 2nd variant of the device for which the transmission load of the threaded rollers on the cover is made through balls.
A device for converting reshitelnogo motion into reciprocating (option 1), see figure 1, consists of a screw 1 and node performing translational movement with the basic elements of "B" (Zapf under the bearings, which are intended for connection of the specified node with the Executive mechanism. The specified node, see figure 2, consists of a body 2 and the two covers 3, which is connected to the housing with 4 screws with lock washers 5 and the two pins 6. At least one between the lid 3 and the housing 2 is installed a set of shims or the compensator 7. There are other possible execution of the specified node, which provides Assembly and operation of the device.
To the outer end surface of each cover 3, see figure 2, attached l-shaped sleeve 8, which holds with axial and radial clearance slinger 9.
Inside the enclosure, see figure 2, set screw rollers 10, which usually from the neighborhood choose the greatest for increasing the load capacity of the device (the minimum number of threaded rollers is three). Threads of the rollers 10 engage with the turns of the thread of the screw 1. At the ends of each threaded roller 10, see figure 2, perform spherical protrusions G with radius Rp, the center of which is located on the axis of the threaded roller. On the inner end surface of each cover perform spherical undercut D with radius RKthe centre which is also located the Yong on the axis of the threaded roller, and the number of solution for back-facing one cap is equal to the number of rollers. To the axis of all of the rollers are parallel to the axis of the screw, the desired angular orientation of the lid relative to the body, which is carried out by means of two pins 6.
A feature of the Assembly of this device, see figure 2, is the selection of the thickness of the set of shims or compensator 7. This thickness should be such that the contact of the spherical projections "G" of each clip with a spherical odnotrahniki "D" in the opposite caps was without axial clearance at points "E" and "W"located on the nominal axis of the roller.
If the device screw is rotated, resulting in rotation around its own axis, all the rollers and the housing with the roller performs translational motion. With the side screws on each roller are axial and radial forces that must be balanced in the points "E" and "W", see figure 2, the initial contact of the spherical projections "G" roller and spherical pagnutti "D" in the opposite covers. So that under the action of radial forces to the point "E" and "W" have not been moved from the nominal position of the roller axis, it is necessary that RKwas 2-3% higher than RPsee figure 2, but no more. Otherwise, the device may stall.
The 1st variant of the device may have additional enforcement is. For him, see figure 3, on the threaded cylindrical surfaces of the rollers 10 are two groove "And". The device is equipped with two rings 11, which are made of spring steel and have high radial rigidity. Each ring 11 is installed in a corresponding groove "And". The ring size 11 should be such that they created a small preload on the screw pair of rollers 10 with the screw 1, in which the device is not jammed.
When assembling this device, see figure 3, due to the specified tightness you need the key to consistently voracity rollers 10 with rings 11 on the screw. For this purpose, each threaded cylindrical surface of each roller or one of its grooves And perform hex "K" key, and the width of the LPgroove And greater than the width of the LKring 11 1.5...2 thread pitch of the screw (the screw roller) to ensure the Assembly of the device. Then the axial position of all of the rollers are aligned with one of the covers 3, install the housing 2, connecting it with a pin and screws with this cover, and is fixed on the second housing cover, by adjusting the axial clearance of the housing with the lid relative to the roller.
When the device is on each roller operates additional overturning moment from axial forces from the screw and one of the covers. To ring 11, see figure 3, can more effectively play the take this tipping point, the grooves And rollers should be performed as close as possible to the opposite ends of the threaded rollers. That is, the distance between the slots "And" (ring 11) should be the maximum possible. The strength on rings from overturning moment will be the smallest and the roller in the plane formed by its axis and the axis of the screw, will have the smallest skew angle that will provide a more uniform load distribution between the turns of the threaded rollers along their axes, and consequently, will increase the load capacity and durability of the inventive device.
Perhaps a second version of the 1-St variant of the device with a higher load capacity by increasing the main curvature of the mating surfaces, resulting in an increased area of contact of these surfaces under load. For this purpose, see figure 4, increasing the radius of the spherical pagnutti in caps RKand the radius of the spherical protrusions on the ends of threaded rollers RPleaving the ratio unchanged.
To improve efficiency of the device, which slightly reduces the load capacity, possible 2nd variant of the inventive device. For this purpose, see figure 5, at the opposite ends of the threaded rollers perform spherical undercut "L" and set them in the balls 12, which also set the in spherical undercut "D", made in the lid 3. The radii of the spherical pagnutti "L" and "D" are equal, and the radius of the ball RW2-3% less than the radius of these pagnutti. The largest sphere radius RW,MAXthat you can apply for this option, the device must be less than half the diameter of the depressions of the thread roller. The value of RWsignificantly affect the load capacity of the device.
The device prototype load with threaded clip on the cap is passed balls. As noted above, the greatest radius of the ball RW,MAXhas a limit on size. The device prototype balls installed in the separator, causing the value of RW,MAXwill be even less. This value is further limited, as at the ends of the rollers should be placed in the key hole. Therefore, the greatest value of the sphere radius ToW,MAXfor device-prototype will be less than in the inventive device with the balls. The value of RW,MAXsignificantly affect the load capacity, as with the increase of RW,MAXsurface tension is less.
However, a more significant reduction of contact stresses and increasing the load capacity depends on the shape and dimensions of the contacting surfaces in the lid of the device. In the device-prototype this surface is circular with radius profile, one main Cree is the Eastern of which is equal to zero. Hence, the contact area of the ball and the annular groove is small. In the inventive device, this surface is spherical, the two main curvature which is the same and reach the maximum possible value. Hence, the contact area of the spherical undercut in the housing cover and a spherical protrusion of the threaded roller or ball (option 2) is significantly greater than in the device prototype.
In addition, the proposed device has a simpler construction than the device prototype.
The inventive device without having toothed crowns and separators for separating the balls, can have smaller dimensions.
1. A device for converting rotary motion into reciprocating containing a screw, a casing attached thereto caps, threaded rollers mounted in the housing can be rotated around its axis and having a cylindrical threaded surface included in threaded engagement with the screw, and the end faces, characterized in that the device is provided with two pins, which are designed for the angular orientation of the lid relative to the housing, the ends of each roller are spherical protrusions, the centers of which are located on the axis of the threaded roller, and each cap is made of a spherical undercut, the centers of which are also located on the axis of the respective screw clip, with the radius sherice is such pagnutti in caps 2-3% more than the radius of the spherical protrusions, performed at the ends of each threaded roller.
2. The device according to claim 1, characterized in that it has two rings, which are mounted in annular grooves made on the cylindrical threaded surface of each roller, and these slots perform as close as possible to the opposite ends of the threaded rollers, cylindrical threaded surface of each roller or one of its annular grooves made hex key, and the width of the annular grooves on the threaded rollers greater than the width of the rings is not less than 1.5 to 2 thread pitch of the screw.
3. A device for converting rotary motion into reciprocating containing a screw, a casing attached thereto caps, threaded rollers mounted in the housing can be rotated around its axis and having a cylindrical threaded surface included in threaded engagement with the screw, the ends of which are spherical undercut, the centers of which are located on the axis of the threaded roller, and balls mounted in said podotreme threaded rollers, characterized in that the device is provided with two pins, which are designed for the angular orientation of the lid relative to the body, each cover is made of a spherical undercut, the centers of which are located on the axis corresponding threaded roller, and for the with spherical pagnutti, performed on the threaded ends of the rollers is equal to the radius of the spherical pagnutti made in the lids, the radius of the balls 2-3% less than the radius of the spherical pagnutti made in the lids, and each ball is additionally installed in the spherical undercut the cover.
SUBSTANCE: invention relates to transfer mechanisms designed to convert rotary motion into reciprocation and alternating motion, and can be used for machining at lathes. The proposed device comprises the housing, rotation mechanism drive, drive transfer shaft, movable actuator linked up with a sliding nut that moves when in mesh with the drive transfer shaft and fixed support of the shaft. The movable actuator surface cross section represents polyhedron, for example quadrate, that is engaged with the intermediate extension with outer surface cross section identical to the inner surface of the movable actuator. The aforesaid extension is attached on the drive transfer shaft square-section end.
EFFECT: reduced metal input and power consumption, automation of machining on lathes and circular grinding machines.
SUBSTANCE: invention relates to mechanics and instrument making, particularly, to screw-rolling-nut gearings and can be used for precise conversion of rotary motion into translation, for example, in feed drives of machine tools, robots, measuring equipment and load-lifting devices. Propose planetary gearing incorporates long threaded rollers 2, sliding 3 and back 4 nuts. Rims 6, 7 fitted on the ends of rollers 2 are in mesh with rims 5 of the screw and epicycles of back nuts 4. Engagements feature maximum tolerable tooth pitch and maximum tolerable negative teeth bias on rollers 2 for continuous engagement in both external and internal gearing and ruling out teeth interference, cutting and sharpening to be provided for. Height of screw, back nut epicycle one roller end teeth is made complete and standard teeth, the roller end having equal number of thread starts over the thread entire length. Height of teeth on the roller other end is made so that the roller tooth apex diameter does not exceed thread OD when roller teeth are intersected by thread only at this very end.
EFFECT: higher lifting capacity and smoothness of gearing.
SUBSTANCE: invention relates to the device for selective interruption of rotation-and-reciprocation made up of a threaded longer element 114 and element 112 with internal thread in mesh with that of the aforesaid longer element. One of the aforesaid elements reciprocates when engaged with the other element till a position limited by end position 150. Reciprocating element 112, 114 can be subjected to instant deformations on reaching the aforesaid end position to get disengaged from the other element.
EFFECT: simpler design.
12 cl, 12 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention can be used in automatic device, quick-acting clamp, vices and jacks. Nut of screw gearing consists of four and more inserts 3 installed in cavities made in longitudinal direction in housing 1. Spring-loaded support 12 rests on conical surfaces 9, 10 on end faces of inserts at one side, and follower 14 at other side. Spring-loaded disk 19 thrusts through two balls against other end face of follower. Spring-loaded disk 19 is coupled with screw 21 through key screw is installed in guides 23, 24 on end pars of housing holes.
EFFECT: improved reliability and operating capabilities of screw gearing, reduced overall dimensions.
FIELD: mechanical engineering.
SUBSTANCE: invention can be used as screw device converting rotation into translational motion. Proposed device consists of screw 1, housing 2 with covers 3, threaded rollers 9 engaging with thread of screw 1. Threaded rollers 9 are fixed from axial displacement relative to housing owing to ball 12 fitted in cages 11 and thrusting against covers of housing by L spherical undercutting made on faces of each threaded roller, and ring slot B made on inner end face surface of each cover. Flexible rings 10 can turn in slots E threaded rollers 9 relative to screw axis. To provide assembling of device, width Ls of slot E of threaded rollers should exceed width Lr of rings by minimum 1.5 - 2 pitches of screw thread. Two makes of device are available. In one of device threaded rollers are additionally coupled with housing by gear engagement and in other device, they are not coupled. Favourable kinematics in places of contact of ball with cover and roller and possibility of rolling of rings along slots E of threaded rollers provide high efficiency, reduced intensity of wear and long service life.
EFFECT: improved operation reliability, long service life and reduced intensity of wear.
2 cl, 3 dwg
FIELD: the invention refers to machine building namely to reduction gears of advance motion and may be used for increasing efforts on a driven shaft.
SUBSTANCE: the reduction gear has a driving slide-block and a driven slide-block, an intermediate unit and a post. The driven and the driving slide-blocks are connected with the intermediate unit through screw kinematic pairs and the intermediate unit itself forms with the post a rotating kinematic pair.
EFFECT: transformation of the advance motion of the driving slide-block through kinematic pairs into advance motion of the driven slide-block.
FIELD: the invention refers to instrument making namely to mechanisms for transformation rotary motion into advance motion and vice versa.
SUBSTANCE: the mechanism has a screw 1 interacting with a separator. The separator is formed with axles 7 on which small balls 2 and 3 take turns. The small balls interact as with the grooves of the profile of the screw so with its combs. Springs 5 are installed on the axles 7 taking gap at transmission of the rotational moment in the arrangement. The axles themselves are hardened from the two sides on advance moving flanges 4.
EFFECT: achieves high sensitiveness of the motion of the mechanism.
FIELD: mechanical engineering; drives of machines, manipulators of industrial robots.
SUBSTANCE: proposed helical transmission has lead screw secured in bearings and nut. It is also provided with rod connected with nut and holders. Nut is made in form of stack of elastic threads located between holders.
EFFECT: enhanced reliability; avoidance of regulation; increased loading capacity.
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: 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.
FIELD: electric engineering.
SUBSTANCE: invention is related to electric engineering, to electromagnet mechanisms, and more specifically, to contactless magnetic reducers, and may be used as transmission device in mechanical systems with high resource of operation under impact loads. Magnetic reducer has rotor of fast rotation with permanent magnets (1), magnetised tangentially, wedge-like pole tips (2) with convex profiled surfaces inverted to working gap, non-magnetic bush (3) for fitting onto shaft of fast rotation (4). Magnetic core (5) with evenly installed teeth inverted to working gap, is fixed to body (6), with which hollow cylinders (7) are mechanically connected by non-magnet ring (10), which have alternating ferromagnetic and non-magnet elements. Rotor of slow rotation represents hollow cylinders (8) mechanically connected to shaft of slow rotation (9) by means of non-magnet disk (11) and has alternating ferromagnetic and non-magnet elements. Due to introduction of hollow cylinders of stator and rotor of slow rotation, magnetic reducer is produced with high transmission torque from alternating ferromagnetic and non-magnetic elements.
EFFECT: improvement of mass and dimensional parameters.
SUBSTANCE: car control device comprise steering wheel (3) coupled with first element (4) that supports second element (13) to drive gears (16) running on axles (17, 18) to transfer motion to turn controlled front wheel (7). Second element (13) is coupled with LH and RG gears (16) running on LH and RD axles (17, 18). One ends of the latter are bent off at 90° with respect to axles and have sliding contact with first element (4). Other ends of axles (17, 18) are coupled with casings (19, 20) furnished with rolling bearings (21, 22) fitted on axle (23) supporting controlled front drive wheel. Tire of aforesaid wheel can have spherical central part (11), while its edges can have support triangular ledges (12) to provide for car stability in turning to the right or left. Proposed device can be used in three-wheeled car with one controlled front wheel (7), two rear driven wheels and streamline body.
EFFECT: higher maneuverability and stability on turns.
2 cl, 3 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention refers to mechanical engineering and serves to transmit rotary motion with rotation frequency conversion and corresponding change in torque moment. The transmission contains case (1), driving three-angle rotor (2) and driven crank arm (6). Working surface of case (1) is made as epitrochoidal contour inside which three-angle rotor (2) with pin (3) for alignment with radial guide (4) of carrier (5) is located. In the rotor (2) body, the crank arm (6) is set coaxially. The crank arm is made eccentric relative to integrated with it cup (7) which has common axis with contour centre and carrier (5). Radii of cup (7) and crank arm (6) interrelate as 2:3 and their eccentricity is equal to half of cup (7) radius. The rotor (2) is in uninterrupted contact with epitrochoidal contour by its all three tops. Contact area of driving rotor (2) force impact on driven crank arm (6) is constant and is equal to half of crank arm cylindrical surface.
EFFECT: increase in loading capacity, durability and efficiency factor of mechanical transmission.
FIELD: engines and pumps.
SUBSTANCE: invention is related to devices with gear engagement of any type, for instance reducers. Gear drive with high-strength teeth is created by two nonstandard gear wheels (1,2), which have standard active profile and diametre of pitch circle, less than standard number of teeth determined by ratio of pitch circle diametre to module. Number of gear rings is more than one and is equal to ratio of angle pitch of nonstandard wheel teeth to angle pitch of appropriate standard wheel teeth rounded to larger integer number. Identical active profiles of teeth of neighboring rings of nonstandard wheels are displaced at the angle that provides for overlap factor of more than one common for wheel rings. Helical rings may create a single gear ring.
EFFECT: makes it possible to create gear drive wheels with number of complete profile teeth of one and more, and also eliminates or considerably reduces fatigue damage of teeth.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to mechanical engineering, and can be used in driving systems of aircrafts. Reduction parallel-shaft gear unitop contains n-pairs of tooth gears (2) and pinion gears (3). Each of pairs allows its reduction rate. All pinion gears (3) are implemented with the same number of teeth. Wheels (2), starting from the second pair from input of reduction gear, allows the same number of teeth and forms with pinion gear (3) reduction rate, equal to 2.4. Wheel of the first pair allow number of teeth, forming with pinion gear reduction rate, required for implementation of any specified value of reduction rate of whole reduction gear.
EFFECT: such implementation of drive provides simplification of structure and reduction of reduction gear mass.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to gear transmission and can be used in precision engineering. Gear contains co-axial fast-speed and low-speed shafts, installed in case (3), rigid gear wheel (10), installed on output shaft (2), separator (9), rigidly fixed in case (3), rollers installed in separator (9) with ability of movement in radial direction and spinning motion, and rigid thrust ring (7). Thrust ring (7) is fixed on inner ring of bearing (6), installed on input shaft (1) with shift relative to shaft axis. Gear wheel (10) allows cycloidal profile.
EFFECT: such gear implementation provides improved reliability of operation and increasing of gear lifetime.
SUBSTANCE: reduction gear comprises spindle (11), which passes substantially perpendicular to carrier (12) and arranged with possibility of radial deviation from initial position under load. Spindle and carrier have support surfaces (23, 24) in shape of substantially truncated cone, normal lines to which pass substantially through centroid of spindle protruding part. In initial position of spindle there is a gap between support surfaces.
EFFECT: increased sensitivity to balancing of common load.
8 cl, 4 dwg
FIELD: mechanical engineering.
SUBSTANCE: planet gear has input shaft with eccentric , race, and satellites.
EFFECT: improved design.
2 cl, 8 dwg