UA73381C2 - Quasi-planetary reducer - Google Patents

Abstract

A quasi-planetary reducer has a housing, input, driving and output shafts, a movable central wheel with teeth, a planet carrier that is fixed in the housing, it carries driving shafts on the bearings, satellite toothed rings installed eccentrically with possibility of relative displacement, eccentricities of those are directed to opposite sides; toothed pinions installed on the driving shafts for kinematic connection of the last ones with the satellite rings installed through bearings and eccentric bushings on all the driving shafts simultaneously. The output shaft is arranged as a cup to which there is connected the central wheel with inner teeth, inside this one there are installed the driving shafts and the satellite rings with external teeth, those go into coupling with the central wheel. The input shaft is installed eccentrically and is made monolithic with one of the driving shafts. The toothed pinions are installed at the opposite side with respect to the input shaft and are kinematically connected to each other through the central parasitic pinion.

Description

Description of the invention

The invention relates to mechanical engineering and can be used in machine drives for the transmission of power 2 loads while providing a large transmission ratio and reducing the dimensions by at least two times compared to existing planetary gearboxes.

A gear reducer of multi-pair internal engagement is known, containing central wheels with internal teeth and satellites with external teeth interacting with them. The central wheels and satellites have a small difference in the number of teeth, and their engagement occurs in a sickle-shaped sector along a curve located in one 70 quadrant | see US patent Mo5505668, M. Cl. Е16Н1/32 dated 04.9.1996|.

The gear reducer allows you to transmit high torques with a high gear ratio.

Its disadvantage is the complexity of the design and the presence of balancers, which increases the weight of the gearbox.

The closest in terms of technical essence to the proposed invention is a gearbox containing a housing, an input, several drive and output shafts, a movable central wheel with teeth, a carrier fixed in the housing, which carries on 79 bearings the drive shafts, eccentrically installed with the possibility of relative movement in a circular direction of the satellites, composed of central and equal to half their width side toothed rings, the eccentricities of which are directed in opposite directions, toothed gears, one of which is placed coaxially with the output shaft, and the others - on the drive shafts for the kinematic connection of the latter with the satellites, which installed through bearings and eccentric bushings simultaneously on all drive shafts, and the central wheel and gear rings have a small difference in the number of teeth (see patent of the Russian Federation Mo2011067, M. Cl. E16Н1/32 dated 04/15/94.

In this gearbox, four satellite rings with internal teeth are mounted on three or more drive shafts and mesh with a central wheel with external teeth, and the output shaft is located on the same axis as the input shaft. The disadvantage of the proposed technical solution is the increased dimensions, since the satellites are located around the central gear wheel, and the space inside it is not used. In addition, with an increase in eccentricity, the dimensions of the bearings on which the He) satellite rings are installed also increase, which leads to an increase in the dimensions of the gearbox.

The task of the invention is to reduce the radial dimensions of the gearbox.

The task is achieved by the fact that in the gearbox, which contains a housing, an input, several driving and output shafts, a movable central wheel with teeth, a carrier fixed in the housing, which carries the drivers on bearings (7 shafts, eccentrically installed with the possibility of relative movement of satellite gear rings , the eccentricities of which are directed in opposite directions, toothed gears placed on the drive shafts for kinematic connection of the latter with satellite rings installed through bearings and eccentric bushings simultaneously on all drive shafts, the output shaft is made in the form of a cup with which connected central wheel with internal teeth, inside which are installed drive shafts and satellite rings with external teeth that mesh with the central wheel, the input shaft is installed eccentrically and is made monolithically with - one of the drive shafts, toothed gears are installed inside the output shaft with of the opposite side relative to the input shaft and are kinematically connected between sob through the central spur gear installed coaxially with the output shaft, and between the gearbox housing and the central wheel, radial support bearings are installed. "

The monolithic execution of the input shaft together with one of the drive shafts and its location eccentrically Z 70 allows reducing the radial dimensions of the gearbox at relatively large values of the eccentricity of the satellite toothed rings, and the toothed gears installed at the other end of the drive shafts, inside the drive shaft, allow you to reduce longitudinal dimensions of the gearbox.

Figure 1 shows the design of the proposed gearbox; in Fig. 2 - view A-A in Fig. 1.

The reducer includes a housing 1, several drive shafts 2, an output shaft C, a movable central wheel 4 with teeth, a folded carrier with integral 5 and removable b side walls, toothed gears 7 fixed on and drive shafts 2 for kinematic connection of the latter with satellites made in the form of toothed rings 8, 9, and 10, 11, which are installed through bearings 12 and eccentric bushings 13 simultaneously on all (in the considered version three) drive shafts 2. The output shaft C is made in the form of a cup, with which splined connected by a connection to the central wheel 4 with internal teeth, inside which are installed the drive shafts 2 and satellite rings 8, 9, 20 10, 11 with external teeth that engage with the central wheel 2. The input shaft 14 is installed eccentrically and is made monolithically with one of the drive shafts 2, toothed gears 7 are installed inside the output shaft C on the opposite side relative to the input shaft 14 and are kinematically connected to each other through the central spur gear 15, in fixed coaxially with the output shaft Z through the bearing 16 on the finger 17, and radial support bearings 18 and 19 are installed between the gearbox housing 1 and the central wheel 4. Satellite 52 rings 8-11 are installed relative to each other and relative to the walls 5 and b of the guide with an axial gap, a

GF) the eccentricities of rings 8 and 11 are directed in the opposite direction relative to the inner rings 9, 10. The drive shafts 2 and 2 are installed on bearings 20 and 21, which are located, respectively, in the walls 5 and 6 of the carrier, and on the wall 5 the bearing covers 22 and 23 are installed. In the cover 23, a hole for the input shaft 14 with a sealing ring 24 is made.

Toothed gears 7 and 15 have the same number of teeth and dimensions, and the non-separable wall 5 of the carrier is fixed in the bo body 1 and is connected to the removable wall 6 of the carrier with the help of remote bushings 25 and bolts 26.

The reducer works in the following way.

Power loads from the engine through the input shaft 14 and toothed gears 7 and 15 are transmitted to the drive shafts 2, and from them through the eccentric bushings 13 and bearings 12 to the toothed rings 8-11 of the assembled satellite.

The synchronous rotation of the drive shafts 2 leads to the simultaneous impact of the eccentric bushings 13 on the satellite rings b5 8-11 in three or more zones separated by the same angular distance, depending on the number of drive shafts 2. The number of teeth 74 of the satellite rings 8-11 is the same and less than the number of teeth 72 of the central wheel 4 by the value from 1 to 10th. As a result of the interaction of the eccentric bushings 13 with the satellite rings 8-11, the latter perform plane-parallel movement relative to the gearbox housing 1 and engage with the central wheel 4, running around it without rotation. During one rotation of the drive shaft 2, each satellite ring 8-11 goes around the central wheel 4 exactly once, and at the same time, the number of 7.4 teeth is engaged. Since the satellite rings 8-11 do not rotate, the central wheel 4 rotates by an angle proportional to the difference in the number of teeth 7 25-24. As a result, the transmission ratio M of the gearbox is determined as:

Me K2-2), 70 which makes it possible to achieve gear ratios from 6 to 300 with this gearbox scheme. Since the power load is transmitted from the input shaft 14 through toothed gears 7 and 15 to other drive shafts 2, it eliminates the presence of dead zones in the operation of the satellite rings, increasing the efficiency of their operation. In addition, the absence of structural elements (input shaft, bearings) in the central part of the reducer allows the drive shafts to be brought closer together in the radial direction, which accordingly reduces the radial dimensions of the reducer, other things being equal.

The technical and economic indicators of the proposed gearbox allow to reduce its dimensions and weight by several times compared to known ones, making its radial dimensions comparable to the diameter of the output shaft while providing torques on the output shaft in the range of 3000-10000On.m. and more. 4 1 10 11 6

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Claims (1)

The formula of the invention 5. - . - Mr. - A quasi-planetary gearbox containing a housing, input, drive and output shafts, a movable central wheel with teeth, a carrier fixed in the housing, which carries the drive shafts on bearings, eccentrically installed with the possibility of relative movement satellite toothed rings, the eccentricities of which are directed in opposite directions, toothed gears installed on the drive shafts for kinematic connection of the latter with satellite 70 rings installed through bearings and eccentric bushings simultaneously on all drive shafts, which is distinguished by the fact that the output shaft is made in the form of a cup, with which the central wheel is connected with internal teeth, inside which are installed drive shafts and satellite rings with external teeth that mesh with the central wheel, the input shaft is installed eccentrically and is made monolithically with one of the drive shafts, toothed gears are installed on the opposite side relative to the input shaft and kinematically from connected to each other through a central spur gear , installed coaxially with the output shaft, and radial support bearings are installed between the gearbox housing and the central wheel. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated microcircuits", 2005, M 7, 15.07.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. 6) "- (ee) (ze) (ze) and - - and? -i (95) (95) (ee) - ime) 60 b5