CN101672347A - Rocket movable launcher reducer with small volume and large torque - Google Patents

Abstract

The invention discloses a small-volume, high-torque reducer for a rocket launch activity platform, which includes input and output boxes, an input bevel gear pair, and a three-stage planetary gear train; the large bevel gear of the input bevel gear pair is installed on the first-stage sun gear shaft Above, the input bevel gear shaft and the first-stage sun gear shaft are positioned in the input box through bearing support; the outer surface of the inner ring gear of the first-stage planetary gear train is used as a part of the box, and is connected with the input box and the coupling box through connectors ; The outer surface of the inner ring gear of the second-stage planetary gear train is used as a part of the box body, and is connected with the two connecting boxes through a connecting piece; Connection box, output box connection. The invention has the advantages of realizing high reliability and long life of the transmission by optimizing the gear parameters; the outer surface of the inner ring gear is directly used as a part of the box body, which greatly reduces the radial dimension and ensures the overall transmission rigidity.

Description

Small size and high torque reducer for rocket launch platform

technical field

The invention relates to a reducer, in particular to a small-volume and high-torque reducer for a rocket launching movable platform.

Background technique

The reducer of the rocket launch platform must have the following properties: high reliability, long life, high efficiency, small size, large output torque, low operating speed, large speed ratio, and high transmission rigidity. At present, my country's rocket launch deceleration device adopts a close-to-round movable-tooth reducer structure, which belongs to the movable-tooth and few-tooth differential transmission. The maximum allowable torque of this type of reducer is small, the transmission efficiency is low, and η<70%, so it cannot fully meet the above-mentioned characteristic requirements.

Contents of the invention

The purpose of the present invention is to provide a small-volume and high-torque reducer for a rocket launch activity platform with high transmission efficiency and high transmission rigidity.

To achieve the above object, the present invention can take the following technical solutions:

The small-volume, high-torque speed reducer for the rocket launching platform of the present invention includes an input and output box, an input bevel gear pair, and a three-stage planetary gear train composed of a sun gear, a planetary gear, a planet carrier, and an inner ring gear respectively. ;

a. The input bevel gear shaft of the input bevel gear pair extends out of the side wall of the input box; the large bevel gear of the input bevel gear pair is installed on the first-stage sun gear shaft, and the input bevel gear shaft and the first-stage sun gear shaft pass through the bearing The support is positioned in the input box, and transmits motion and power to the first-stage planetary gear train through the first-stage sun gear shaft;

b. The outer surface of the inner ring gear of the first-stage planetary gear train is used as a part of the box, and is respectively connected with the input box and the connecting box through connectors; the three first-stage planetary gears are respectively supported on the first-stage planet carrier by bearings , the first-stage planetary carrier is floating, and the motion and power are transmitted to the sun gear of the second-stage planetary gear system through the first-stage planetary carrier;

c. The outer surface of the inner ring gear of the secondary planetary gear train is used as a part of the box, and is connected to the two connecting boxes through connecting pieces; the four secondary planetary wheels are respectively supported on the secondary planetary frame through bearings, and the secondary The planet carrier is positioned in the coupling box through the bearing support; the secondary sun gear is floating, and the motion and power are transmitted to the sun gear of the tertiary planetary gear system through the secondary planet carrier;

d. The outer surface of the inner ring gear of the three-stage planetary gear train is used as a part of the box, and is respectively connected with the connecting box and the output box through connecting pieces; the four three-stage planetary gears are respectively supported on the three-stage planet carrier through bearings, The two ends of the three-stage planetary frame are respectively positioned in the connection box and the output box through bearing supports; the three-stage sun gear is floating, and the motion and power are output through the three-stage planetary frame.

The advantages of the present invention are: the high reliability and long life of the transmission are achieved by optimizing the gear parameters; the planetary gear train with the highest efficiency is selected to achieve high efficiency; Therefore, the radial dimension is greatly reduced to achieve the purpose of small volume; the overall transmission stiffness of the present invention is guaranteed through the gear tooth parameter design, the planet carrier and the box structure design.

Description of drawings:

Fig. 1 is a schematic diagram of the main sectional structure of the present invention.

Detailed ways

As shown in the figure, the small-volume high-torque speed reducer of the rocket launching platform according to the present invention includes a box body, an input bevel gear pair and a three-stage planetary gear train, and is characterized in that:

a. The input bevel gear shaft 1 of the input bevel gear pair extends out of the box, the large bevel gear 2 is installed on the first-stage sun gear 3-axis, and the input bevel gear shaft 1 and the first-stage sun gear 3-axis are supported by front and rear bearings It is located in the input box 18, and transmits motion and power to the first-stage planetary gear train through the three-axis first-stage sun gear;

b. The outer surface of the ring gear 5 of the first-stage planetary gear train is used as a part of the box, and is connected with the input box 18 and the connecting box 17 through connectors; it is connected with the second-stage planetary gear train through the connecting box 17; The three first-stage planetary wheels 4 are respectively supported on the first-stage planetary carrier 6 through bearings, and the first-stage planetary carrier 6 is floatingly set to achieve equal load on the three first-stage planetary wheels 4, and the motion and power are transmitted through the first-stage planetary carrier 6 For the sun gear 7 of the secondary planetary gear train;

c. The outer surface of the inner ring gear 9 of the secondary planetary gear train is used as a part of the box, and is connected to the connecting box 17 and the connecting box 16 through connectors; the connecting box 17 is connected to the primary planetary gear train, Connected with the third-stage planetary gear train through the connecting box 16; the four secondary planetary wheels 8 are respectively supported on the secondary planetary carrier 10 through bearings, and the secondary planetary carrier 10 is positioned in the connecting box 17, 16 through the bearing support; The secondary sun gear 7 is floatingly set to achieve the equal load of the four secondary planetary gears 8, and the motion and power are transmitted to the sun gear 11 of the tertiary planetary gear system through the secondary planet carrier 10;

d. The ring gear 14 of the three-stage planetary gear train is used as a part of the box body, and is connected with the connecting box body 16 and the output box body 15 through connectors to realize connection with the two-stage planetary gear train; four three-stage planetary gears 12 The three-stage planet carrier 13 is respectively supported by bearings, and the two ends of the three-stage planet carrier 13 are respectively positioned in the connection box 16 and the output box 15 through the bearing support; the three-stage sun gear 11 is floatingly set to achieve four three-stage The planetary gears 12 are evenly loaded, and the motion and power are output through the three-stage planet carrier 13 .

Claims (1)

1. A small-volume, high-torque speed reducer for a rocket launching platform, comprising input and output boxes (18, 15), an input bevel gear pair, and three gears consisting of a sun gear, a planetary gear, a planet carrier, and an inner ring gear. Stage planetary gear train; It is characterized in that: a. The input bevel gear shaft (1) of the input bevel gear pair extends out of the side wall of the input box (18); the large bevel gear (2) of the input bevel gear pair is installed on the shaft of the primary sun gear (3) Above, the input bevel gear shaft (1) and the first-stage sun gear (3) shaft are positioned in the input box (18) through the bearing support, and the motion and power are transmitted to the first-stage planet through the first-stage sun gear (3) shaft wheel train; b. The outer surface of the inner ring gear (5) of the first-stage planetary gear train is used as a part of the box body, and is connected with the input box body (18) and the connection box body (17) respectively through connectors; the three first-stage planetary gears ( 4) Supported on the first-stage planetary carrier (6) through bearings, the first-stage planetary carrier (6) is floating, and the motion and power are transmitted to the sun gear (7) of the second-stage planetary gear system through the first-stage planetary carrier (6) ); c, the outer surface of the ring gear (9) of the secondary planetary gear train is used as a part of the box, and is connected with the connecting box (17) and the connecting box (16) respectively through connecting pieces; the four secondary planetary gears ( 8) The secondary planetary carrier (10) is respectively supported by bearings, and the secondary planetary carrier (10) is positioned in the connection box (17, 16) through the bearing support; the secondary sun gear (7) is floating, and the secondary The first-stage planet carrier (10) transmits motion and power to the sun gear (11) of the three-stage planetary gear train; d. The outer surface of the inner ring gear (14) of the three-stage planetary gear train is used as a part of the box, and is connected to the connecting box 16 and the output box 15 through connectors; the four three-stage planetary gears (12) are respectively passed through the bearings Supported on the third-stage planetary carrier (13), the two ends of the third-stage planetary carrier (13) are respectively positioned in the connection box (16) and the output box (15) through bearing supports; the third-stage sun gear (11) is floating , the motion and power are output through the three-stage planet carrier (13).

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