CN201535344U - Small size and high torque reducer for rocket launch platform - Google Patents

Abstract

The utility model discloses a small-volume large-torque decelerator for a rocket-launching movable platform, which comprises an input/output case body, an input bevel gear pair and a tertiary planetary gear system; the input bevel gear pair and a bevel gear wheel are installed on a primary sun wheel axle; an input bevel gear shaft and the primary sun wheel axle are supported and positioned in the input case body through bearings; the outer surface of an internal gear ring of the primary planetary gear system serves as a part of the case body and is connected with the input case body and a connecting case body through connecting parts; the outer surface of an internal gear ring of a secondary planetary gear system serves as a part of the case body and is connected with two connecting case bodies through connecting parts; and the outer surface of an internal gear ring of a tertiary planetary gear system servers as a part of the case body and is connected with a connecting case body and an output case body through connecting parts. The utility model has the advantages as follows: the gear parameter optimization is utilized to realize the high reliability of transmission and extend the service life of the decelerator; and since the outer surface of the internal gear ring is directly used as a part of the case body, the radial dimension is greatly reduced, and the overall transmission rigidity is guaranteed.

Description

Small size and high torque reducer for rocket launch platform

technical field

The utility model relates to a reducer, in particular to a small-volume and high-torque reducer for a rocket launch 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.

Utility model content

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

In order to achieve the above object, the utility model can take the following technical solutions:

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

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 utility model has the advantages of: utilizing gear parameter optimization to realize high reliability and long service life of the transmission; selecting the planetary gear train with the highest efficiency to achieve high efficiency; directly using the outer surface of the inner ring gear as a part of the box body, and using the low-speed stage Four planetary gears greatly reduce the radial size and realize the purpose of small volume; the overall transmission rigidity of the utility model 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 section of the utility model.

Detailed ways

As shown in the figure, the small-volume, high-torque reducer for the rocket launching platform of 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, and the large bevel gear 2 is installed on the first-stage sun gear 3-axis. The input bevel gear shaft 1 and the first-stage sun gear 3-axis are positioned through the front and rear bearings. In the input box 18, the motion and power are transmitted 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 casings (18, 15), an input bevel gear pair, and three gears consisting of a sun gear, a planetary gear, a planet carrier, and an internal ring gear respectively. 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 body, and is connected with the connection box body (16) and the output box body (15) respectively through connectors; four three-stage planetary gears (12 ) are respectively supported on the third-stage planetary carrier (13) through bearings, and 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) floating setting, through the three-stage planet carrier (13) to output motion and power.

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