Planet gear

FIELD: mechanical engineering.

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

EFFECT: improved design.

2 cl, 8 dwg

 

The invention relates to mechanical engineering and can be used in Electromechanical actuators high kinematic accuracy and reverse transmission to convert rotational motion, for example in positioning systems; machinery; as a gearbox to drive the Executive body of the robot.

Known planetary transmission to convert rotational motion (see U.S. Pat. GB No. 1516959 F 16 H 1/32, publ. 1978). The gear includes a shaft with a double eccentric, whose parts are shifted to each other by 180°, satellites, has a profile in the shape of the equidistant shortened epicycloid, a sun wheel with the inner ring being in engagement with satellites, the output shaft is kinematically associated with satellites using a device that transmits only the component of free rotation. In order to increase the number of simultaneously siteplease of coils, to reduce the backlash of the transmission and to eliminate the impact arising from the engagement of the tooth tip of a satellite with ivory, the profile of satellites corrected. The disadvantage of this transmission is the presence of backlash, which is unacceptable in the case of the use of this type of gearbox in reverse precession systems.

Known cycloidal reducer (see AC. SU # 1778415 A1 F 16 H 1/32, publ. 1992), contains a rotating cage, the size of the military in with the rotation of the bobbin, and eccentric with satellites. Each clip consists of two rings of metal and elastic material. This design is intended to provide backlash-free engagement of a cycloidal wheel and sun wheel. The disadvantage of this design is the complexity of manufacturing, low kinematic accuracy, the presence of elastic elements (spring, an elastic ring elastic ring)to which is applied considerable effort on the part of the satellite that after prolonged use leads to decrease their stiffness and accordingly to the specification of the transfer.

Known gearbox (see AC. SU # 1772503 F 16 H 1/32, publ. 1992), which comprises a cylindrical housing, the clip with coils, satellites, has a profile in the form of equidistant shortened epicycloid installed on a sectional Cam role was taken by the rollers. The satellites are made with a groove in the form of coils and pins are balls or barrel-shaped rollers. This design is intended to increase the kinematic accuracy of the transfer. The disadvantage of this design is the complexity of education grooves spherical shape on the satellites and the occurrence of backlash when the wear of the contacting surfaces of the pairs.

Known the closest in technical essence to the present invention is against the first gear with internal toothing (see patent US 5145468 And 08.09.1992 g)containing the input shaft with sectional eccentric; satellites that communicate with the latter through the rollers; a sun wheel, made in the form of clips of coils mounted for rotation around their axes on a circle concentric with the input shaft, and is made in the form of truncated cones, siteplease with satellites, with the profile response profile of coils, which are mounted for movement towards satellites in the axial direction, and means for transmitting component of the free rotation of the satellites to the output shaft through his fingers.

Using this technical solution allows to reduce the free play in the gear, but can't fix, because it should be left gaps to prevent jamming of the transfer because of the inevitable errors step gearing and thermal expansion of the elements of the system. In addition, the errors step gearing results in an uneven load distribution between the coils, reducing the load capacity of the transmission.

The task of the invention to provide a backlash-free engagement with high kinematic accuracy and increase the load capacity of the gear.

To solve the problem in a planetary gear with internal toothing, containing the same shaft with sectional eccentric; satellites that communicate with the latter through the rollers; a sun wheel, made in the form of clips of coils mounted for rotation around their axes on a circle concentric with the input shaft, and is made in the form of truncated cones, siteplease with satellites, with the profile response profile of coils, which are mounted for movement towards satellites in the axial direction, and means for transmitting component of the free rotation of the satellites to the output shaft through the fingers pins is spring-loaded relative to the inner end of the cage or relative to each other by a larger base of the truncated cone bobbin.

The angle of taper of coils α choose from the relation:

where B - width of a satellite;

D is the maximum diameter of the peaks of the teeth of the satellites.

It is advisable that the pins were made detachable two parts facing each other the same grounds, and is spring-loaded relative to each other by large grounds.

Elastic elements help to create a pair of working profiles horn and satellite with tightness that, on the one hand, will not cause jamming of the transfer, and on the other will provide the opportunity to eliminate backlash when worn surfaces siteplease higher pairs, thus achieving what is samostanowienia pair of contacting profiles.

The total stiffness of the system when adjusting the position of the coils to eliminate backlash does not change (not used elastic elements in the nodes of the transmission of torque), therefore, increases the kinematic accuracy of the transfer.

The load capacity of the gear increases, since the profiles of the coils and satellites increases the number of simultaneously being engaged couples Tarsus - tooth satellite.

The invention is illustrated by drawings.

Figure 1 shows the cross-section transmission option 1.

Figure 2 - cross section a-a figure 1.

Figure 3 - a section b-b figure 1.

Figure 4 - possible options for the regulation of the axial position of the coils and elastic elements for different versions of the pair of coils and satellites.

Figure 5 - cross section of a gearbox with additional sectional eccentric.

Figure 6 - cross section a-a figure 5.

7 - section b-b figure 5.

On Fig presents schemes determine the movement of the bobbin in the axial direction necessary to match the profiles of the coils and satellite.

Transmission (figure 1) contains the input shaft 1, which is installed in the housing 2 and the output shaft 3 by means of bearings 4 and 5. On the input shaft 1 on the key 6 is planted sectional Cam 7, the number of partitions is equal to the number N used in the gearbox of satellites 8, 9, and sections of the eccentric is moved relative to each other by the angle 2π /N. Satellites 8, 9, sections 10, 11 (figure 2, figure 3) have the form of equidistant shortened epicycloid in cross section, is installed on the sectional Cam 7 by means of rollers 12. Satellites 8, 9 are located in the inner engagement with the coils 13 in the shape of a truncated cone and spaced around the circumference of the ferrule 14, and the pins 13 in engagement with the teeth of the satellites 8, 9 rotate on the axis 15. In longitudinal section satellites 8, 9 have the form, return the form of coils 13. The device 16 for adjusting the position of the coils 13 in the axial direction (figure 4) consists of nuts 17, 18 with micrometer thread. Elastic elements 19 are used to mate with the tightness of the coils 13 and satellites 8, 9. Satellites 8, 9 have openings 20, the centers of which are located on circles concentric with the respective axes of the eccentric sections 7. Means for transmitting to the output shaft 3 part free rotation of satellites 8, 9 contains the fingers 21, the centers of which are located on a circle concentric with the axis of the input shaft 1, and passing through the holes 20 satellites 8, 9, needle bearings 22 and the support ring 23. When running surfaces of the holes 20 on the fingers 21 last have the opportunity to rotate around its own axis due to the needle roller bearing 22. The support ring 23 is designed to provide uniform load and the fingers 21. The output shaft 3 is installed in the housing 24 by means of ball bearings 25 and 26. Cuff 27, 28 are designed to prevent leakage of lubricant and the ingress of dust. The housing 2, the housing 14 and housing 24 is tightened by means of bolts 29.

Planetary gear shown in figure 5 differs from that shown in figure 1 by the fact that it is equipped with additional sectional eccentrics 30, 31, and all eccentrics 7, 30, 31 mounted on the shafts 32, located on a circle concentric with the input shaft 1, and connected with the latter through the transmission gear 33. The support ring 23 and the output shaft 3 is tightened by screws 34 and is installed in the housing 2 by means of bearings 35, 36.

The transfer works as follows. When the rotation of the input shaft 1 on the Cam 7, the role was taken, there is a force which tends to rotate the satellites 8 and 9 in the direction coinciding with the direction of rotation of the input shaft 1, but since the teeth of the satellites 8, 9 are based on the bobbin 13, satellites 8 and 9 start to rotate in the opposite direction, objetivas on clowning 7 with the rollers 12. Satellites 8 and 9 make complex planar movement with respect to the axis of the input shaft 1. To convert the complex plane motion of satellites 8 and 9 in concentric movement of the output shaft 3 is used the device for the transmission component of the free rotation of the satellites, consisting the e of the fingers 21 and the support ring 23. The fingers 21 are installed in the bearing ring 23 and the output shaft on needle bearings 22. Moreover, when the sliding surface of the holes satellites 8 and 9 on the fingers 21 of the latter will rotate around its own axis by bearings 22.

The difference operation performed in accordance with figure 5, is that the rotation of the input shaft 1 is transmitted to the eccentric 7, 30, 31 (Fig.6, Fig.7) through a gear reducer 33 (figure 5).

By tightening the nuts 17 and 18 (figure 4) pins 13 are moved toward the satellites 8 and 9 in the axial direction. Knowing the tolerances for the manufacture of satellites 8, 9 and the coils 13, it is possible to determine the position 13’ of the bobbin (Fig) after adjustment, and accordingly move that you want to inform the coils 13 to match their profiles with the profile of satellites 8, 9.

The proposed invention will eliminate the backlash in the transmission, to improve the kinematic accuracy and increase the load capacity of the gear.

1. Planetary gear with internal toothing, containing the input shaft with the partial Cam satellites that communicate with the latter through the rollers, a sun wheel, made in the form of clips of coils mounted for rotation around their axes on a circle concentric with the input shaft, and is made in the form of truncated cones, siteplease with satellites, have the relevant profile, the response profile of the coils, which are mounted for movement towards satellites in the axial direction, and means for transmitting component of the free rotation of the satellites to the output shaft through the fingers, wherein the bobbin is spring-loaded relative to the inner end of the cage or relative to each other by a larger base of the truncated cone bobbin.

2. The planetary gearbox according to claim 1, characterized in that the angle of taper of coils α choose from the relation:

where B - width of a satellite;

D is the maximum diameter of the peaks of the teeth of the satellites.

3. The planetary gearbox according to claim 1, wherein the bobbin is made detachable two parts facing each other the same grounds and is spring-loaded relative to each other by large grounds.



 

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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.

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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.

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Gear mechanism // 2250340

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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.

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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: reduction gear comprises housing (1), teeth-rollers freely mounted in the recesses of the housing, driving shaft with eccentrics (9), driven flange, and satellites with teeth-rollers (15) freely mounted in the recesses. Teeth-rollers (15) engage teeth-rollers (14). The satellites transmit torque to the driven flange through pins (12). Teeth-rollers (15) of satellites and teeth-rollers (14) of housing (1) cooperate with each other through intermediate set of rollers (16).

EFFECT: enhanced efficiency.

1 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: planetary-spool reducer has turning case, motionless flange, second flange, drive shaft with eccentrics disposed uniformly around it, satellites with epicycloidal teeth, roller teeth mounted freely inside internal grooves of turning case. Drive shaft has axis of rotation shifted relatively turning case. Second flange is rigidly tied with first flange by bridges crossing windows of satellites. Drive shaft is mounted in roller supports of flanges which supports are disposed eccentrically.

EFFECT: improved efficiency of reducer.

3 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: planet high-power reduction gear comprises housing (1), low-speed shaft made in block with carrier (5), satellites, solar wheel (14), and floating central wheel (2) that is composed of two rims whose teeth are directed oppositely. Solar wheel (14) is secured to driving wheel (13). Housing (1) of the reduction gear is made in block with the common intermediate link provided with inner teeth for receiving the floating central wheel (2) having outer teeth (gearing compensating clutch). The outer diameter of carrier (5) is provided with two end pins for rolling bearings to engage carrier (5) with low-speed shaft through them. The carrier is provided with the central setting opening for receiving driving shaft with solar wheel (14) mounted on the rolling bearings and coaxially-radial setting single-sided openings for receiving satellite gearing compensating clutches (8) mounted on the rolling bearings. Carrier (5) from the side of driving shaft (13) has bearing radially face flange (15) which connects driving shaft (13) and axles with the satellite gearing compensating clutches (8).

EFFECT: enhanced reliability and reduced metal consumption.

3 dwg

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