RU2462631C1 - Planetary gear - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: planetary gear comprises a master eccentric carrier (1), four satellites (2) with external teeth and holes, installed onto spherical rolling bearings (3), a central wheel (4) with internal teeth, a disc (5) with holes, rigidly connected with a master shaft (7), and installed in holes of satellites (2) and the disc (5) freely, movably short and long rollers (8, 9). Rolls (8, 9) in the form of their coupling with satellites (2) are arranged with surfaces in the form of a hyperboloid of rotation, and in areas of coupling with the disc (5) - in the form of a truncated ellipsoid. Satellites (2) and the disc (5) are arranged with surfaces corresponding to surfaces of rollers (8, 9). Short rollers (8) are coupled with two middle satellites (2), and long rollers (9) - with two extreme satellites (2).

EFFECT: invention makes it possible to increase loading capacity of a planetary gear.

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Description

The invention relates to the field of engineering, in particular to mechanical gears, and can be used in all sectors of the economy.

Known planetary gear containing a leading eccentric carrier; four satellites with holes; disks rigidly interconnected; axles mounted in disks on rolling bearings; a central wheel with internal teeth and an output shaft, the axles being located in the holes of the satellites with a gap equal to twice the center distance of the transmission (international patent WO 2004/090377 A1, IPC F16H 1/32. QUASYPLANETARY GEAR SYSTEM / LYKHOVYD, Yuriy M. [UA / UA]; nl. Rad. Ukraine, 20-B-570, Kiev, 04215 (UA), ... 21.10.2004).

The disadvantage of this design is the low load capacity, which is due to the lack of self-alignment of the links and, therefore, the uneven distribution of the load in their interfaces.

Also known is a planetary gear containing a leading eccentric carrier, one or more satellites with external teeth and holes mounted on rolling bearings, a central wheel with internal teeth, a disk with holes rigidly connected to the driven shaft, and freely installed in the holes of the satellites and disk, movable rollers (Pat. No. 2402709 of the Russian Federation, IPC F16H 1/32. Planetary gear. / Plekhanov F.I., Veretennikov N.D., Karkin N.A., Kazakov I.A. Publ. 27.10.2010, bull. No. 30) (prototype).

The disadvantage of this design is also the low load capacity, which is associated with the lack of self-alignment of the links.

The objective of the invention is to increase the load capacity of a planetary gear.

To solve this problem, in a planetary gear containing a leading eccentric carrier, four satellites with external teeth and holes mounted on rolling bearings, a central wheel with internal teeth, a disk with holes rigidly connected to the driven shaft, and freely installed in the holes of the satellites and disk , movable rollers, rollers in the places of their interfacing with the satellites are made in the form of a hyperboloid of rotation, and in the places of interfacing with the disk in the form of a truncated ellipsoid; the satellites and the disk are made with surfaces corresponding to the surfaces of the rollers, moreover, one half of the rollers is longer and mates with the extreme two satellites, the second is shorter and mates with the middle two satellites.

The increase in load capacity is achieved through the implementation of the rollers, disk and satellites in the places of their interfacing with surfaces, providing self-alignment of transmission links.

Figure 1 shows a General view of the planetary gear in the context, figure 2 is a view along aa in figure 1, figure 3 is a view along b-b in figure 2.

The planetary gear contains a leading eccentric carrier 1, four satellites with external teeth and holes 2, spherical rolling bearings 3, a central wheel with internal teeth 4, a disk with holes 5, rods 6, a driven shaft 7, short rollers 8 and long rollers 9.

The rollers 8 and 9 in their middle part have the form of a truncated ellipsoid, and at the ends the surface is in the form of a hyperboloid of revolution. Similar surfaces have a disk 5 and satellite 2 in the areas of their interface with the rollers 8 and 9, respectively. The diameters of the holes of the disk 5 and satellites 2 in the places of pairing with the rollers exceed the diameters of the rollers 8 and 9 by the distance of the axle distance of the planetary gear. The eccentricity of the leading eccentric carrier 1 at the installation sites of the middle satellites 2 is directed opposite to its eccentricity at the installation sites of the extreme satellites 2. The rods 6 and the cylindrical necks of the long rollers 9 are made with a diameter smaller than the diameter of the corresponding holes of the satellites 2 by an amount equal to or greater than twice the center distance.

The disk 5 is rigidly connected by means of the rods 6 to the driven shaft 7. The satellites 2 are mounted on spherical bearings 3.

Assembly planetary gear is as follows.

A disk 5 is located in the middle part of the leading eccentric carrier 1, short rollers 8 and long rollers 9 are inserted into the holes of the disk 5. 2 medium satellites 2 are mounted on short and long rollers 8, 9, spherical bearings 3 are mounted on them and on the leading eccentric carrier 1 . The extreme satellites 2 are mounted on long rollers 9, spherical bearings 3 are mounted in them and on the leading eccentric carrier 1. Then, the rods 6. are inserted and expanded into the holes of the disk 5 and the driven shaft 7 through the holes of the satellites 2. sevym moving subassembly satellites parts 2 are engaged with the central wheel 4.

The planetary gear operates as follows.

The rotation from the leading eccentric carrier 1 is transmitted to the satellites 2, and from them through the short and long rollers 8 and 9 to the disk 5 and the driven shaft 7 rigidly connected to it. In this case, the satellites 2 and the rollers 8, 9 are self-installing.

The increase in load capacity is provided by reducing uneven load distribution in the mates of parts.

INFORMATION SOURCES

1. International patent WO 2004/090377 A1, IPC F16H 1/32. QUASYPLANETARY GEAR SYSTEM / LYKHOVYD, Yuriy M. [UA / UA]; nl. Rad. Ukraine, 20-B-570, Kiev, 04215 (UA), ... 21.10.2004

2. Pat. No. 2402709 of the Russian Federation, IPC F16H 1/32. Planetary gear. / Plekhanov F.I., Veretennikov N.D., Karkin N.A., Kazakov I.A. Publ. 10/27/2010, bull. No. 30 (prototype).

Claims (1)

A planetary gear containing a leading eccentric carrier, four satellites with external teeth and holes mounted on rolling bearings, a central wheel with internal teeth, a disk with holes rigidly connected to the driven shaft, and freely installed in the holes of the satellites and disk, movable rollers, characterized the fact that the rollers in the places of their interfacing with the satellites are made with surfaces in the form of a hyperboloid of rotation, and in the places of interfacing with the disk in the form of a truncated ellipsoid; the satellites and the disk are made with surfaces corresponding to the surfaces of the rollers, moreover, one half of the rollers is longer and mates with the extreme two satellites, the second is shorter and mates with the middle two satellites.

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