CN110905975A - Multi-speed-ratio compound output speed reducer - Google Patents

Multi-speed-ratio compound output speed reducer Download PDF

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Publication number
CN110905975A
CN110905975A CN201911268688.0A CN201911268688A CN110905975A CN 110905975 A CN110905975 A CN 110905975A CN 201911268688 A CN201911268688 A CN 201911268688A CN 110905975 A CN110905975 A CN 110905975A
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CN
China
Prior art keywords
planetary
output
gear
internal gear
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911268688.0A
Other languages
Chinese (zh)
Inventor
董红卫
朱晖晖
杨瑞超
孟华
张璐
曹帅
豆少鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Aerospace Precision Electromechanical Institute
Original Assignee
Xian Aerospace Precision Electromechanical Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Aerospace Precision Electromechanical Institute filed Critical Xian Aerospace Precision Electromechanical Institute
Priority to CN201911268688.0A priority Critical patent/CN110905975A/en
Publication of CN110905975A publication Critical patent/CN110905975A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/28Toothed gearings for conveying rotary motion with gears having orbital motion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/08General details of gearing of gearings with members having orbital motion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/08General details of gearing of gearings with members having orbital motion
    • F16H2057/085Bearings for orbital gears

Abstract

The invention provides a multi-speed ratio compound output speed reducer which comprises a shell, an input gear system, a planetary rotating system and an output system, wherein the input gear system, the planetary rotating system and the output system are arranged in an inner cavity of the shell; the three-gear planetary speed reducer comprises a set of input gear system, two sets of planetary rotating systems and three sets of output systems, wherein the three sets of input systems are coaxially arranged, and three different speed reduction ratios are simultaneously obtained by utilizing the three sets of input systems in one speed reduction structure. Wherein, the fixed internal gear is fixedly connected with the shell to form a supporting part of the reducer; the rotary internal gear is fixedly connected with an output end flange to form an output end of the speed reducer; the planetary gear mechanism is arranged on the planet carrier and can do planetary rotation motion around the axis of the speed reducer. The invention has the characteristics of small volume, light weight and large reduction ratio; the speed reduction scheme structurally adopts an input shaft and three output ends, the input shaft and the three output ends are coaxially arranged, three different speed reduction ratios are obtained in one speed reduction structure, and therefore the three purposes of one machine are achieved.

Description

Multi-speed-ratio compound output speed reducer
Technical Field
The invention relates to the field of speed reducers, in particular to a multi-speed-ratio compound output speed reducer.
Background
The planetary gear transmission is a gear transmission mechanism with at least one gear and an axis thereof rotating around a fixed shaft, and the structure mainly comprises: the sun gear, the planet gear and the planet carrier. The planetary gear transmission mostly adopts an internal gear, and usually a plurality of planetary gears transmit load at the same time, so that power is transmitted in a split way, and the differential planetary gear transmission has the advantages of compact structure, small volume and mass, large transmission ratio range, high transmission efficiency, stable operation, low noise and the like.
At present, the speed reducer generally has a fixed speed reduction ratio, the rotating motion on the input shaft can be accelerated or decelerated according to a certain proportion, and the transmission form can be used in most occasions. In some complex mechanisms, a plurality of rotary motions with different rotating speeds and torques are often required to drive different parts in the mechanism to complete the motions, and at the moment, a plurality of motors with different specifications and speed reducers are required to be matched for use, so that the volume and the mass of the mechanism are increased, and the research, development and manufacturing costs of the mechanism are increased.
Disclosure of Invention
Aiming at the defects and limitations of the prior art, the invention aims to provide a multi-speed-ratio compound output speed reducer, which realizes that the speed reducer can obtain three different speed reduction ratios in one speed reducing structure.
The technical scheme of the invention is as follows:
the multi-speed ratio compound output speed reducer comprises a shell, an input gear system, a planetary rotating system and an output system, wherein the input gear system, the planetary rotating system and the output system are arranged in an inner cavity of the shell; the planetary rotation system comprises a planetary rotation system A and a planetary rotation system B; the output system comprises an output system A, an output system B and an output shaft;
the input gear system comprises an input gear shaft with an input gear A and an input gear B for driving a planetary rotating system B, and the input gear B is arranged at the rear end of the input gear A;
a fixed internal gear A matched with the planetary rotating system A, a fixed internal gear B matched with the planetary rotating system B and an end cover used as a supporting piece are arranged on the inner side of the shell; the end cover is arranged between the fixed internal gear A and the fixed internal gear B and divides the inner cavity of the shell into two parts;
the planetary rotation system A comprises a planet carrier A, N planet master gear A, N planet slave gears A and N spline shafts A; the N planetary main gears A are meshed with the input gear A and the fixed internal gear A simultaneously, the planetary main gears A and the planetary slave gears A are installed on the spline shaft A, the planetary slave gears A are located at the front ends of the planetary main gears A, the spline shaft A is installed on the planet carrier A through a bearing, and one end of the planet carrier A is installed on the end cover through a bearing;
the output system A comprises an output end flange A and a rotary internal gear A; the rotating internal gear A is simultaneously meshed with the N planetary slave gears A, and is installed on the shell through a crossed roller bearing; the output end flange A is fixed on the outer end face of the rotary internal gear A and is positioned at one end of the shell; the other end of the planet carrier A is mounted on the output end flange A through a bearing;
the planetary rotation system B comprises a planet carrier B, N planet main gears B, N planet slave gears B and N spline shafts B; the N planetary main gears B are simultaneously meshed with the input gear B and the fixed internal gear B, the planetary main gears B and the planetary slave gears B are arranged on the spline shaft B, the planetary slave gears B are positioned at the rear ends of the planetary main gears B, the spline shaft B is arranged on the planet carrier B through a bearing, and one end of the planet carrier B is arranged on the end cover through a bearing;
the output system B comprises an output end flange B and a rotary internal gear B; the rotating internal gear B is simultaneously meshed with the N planetary slave gears B, and the rotating internal gear B is installed on the machine shell through a crossed roller bearing; the output end flange B is fixed on the outer end face of the rotary internal gear B and is positioned at the other end of the machine shell; the other end of the planet carrier B is mounted on the output end flange B through a bearing;
the output shaft is fixedly connected with the planet carrier B and is installed on the shell through a bearing.
Further, the crisscross roller bearing is fixed to the housing through a bearing ring.
Further, the internal gear a is mounted on the housing through two rows of crisscross roller bearings.
Further, the above N is 2 to 4.
Further, the end cover is fixed to the housing by screws.
Further, the output end flange a and the internal rotating gear a are fixed by screws.
Further, the output end flange B and the internal rotating gear B are fixed by screws.
The invention has the advantages that:
the invention adopts a 3Z type small tooth difference planetary gear transmission form, and has the characteristics of small planetary transmission volume, light weight and large reduction ratio; the speed reduction scheme structurally adopts an input shaft and three output ends, the input shaft and the three output ends are coaxially arranged, three different speed reduction ratios are obtained in one speed reduction structure, and therefore the three purposes of one machine are achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The reference numbers are as follows:
1-input gear shaft; 2-output end flange A; 3-planet carrier a; 4-rotating annulus gear a; 5-a machine shell; 6-bearing ring; 7-planetary master gear a; 8-spline shaft A; 9-planetary slave gear a; 10-fixed annulus gear a; 11-end cap; 12-planet carrier B; 13-fixed annulus gear B; 14-planetary main gear B; 15-input gear a; 16-rotating annulus gear B; 17-planetary slave gear B; 18-spline shaft B; 19-output end flange B; 20-an output shaft; 21-bearing I; 22-bearing II; 23-bearing iii; 24-cross roller bearings; 25-bearing IV; 26-input gear B; 27-bearing v; 28-bearing VI; 29-bearing VII.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the multiple ratio compound output reduction gear includes a housing 5, and an input gear system, a planetary rotation system and an output system installed in an inner cavity of the housing 5. The three-gear planetary speed reducer comprises a set of input gear system, two sets of planetary rotating systems and three sets of output systems, wherein the three sets of input systems are coaxially arranged, and three different speed reduction ratios are simultaneously obtained by utilizing the three sets of input systems in one speed reduction structure.
A housing portion: the shell 5, the fixed internal gear A10, the fixed internal gear B13 and the end cover 11 are fixedly connected through screws to form a supporting part which integrally forms the speed reducer.
Input gear system: the input gear shaft 1 is used as a driving piece of a planetary rotation system and is supported on a planet carrier A3 and an output shaft 20 through a bearing II 22, a bearing IV 25 and a bearing VI 28; the input gear B26 is mounted on the input gear shaft 1 as a drive member of the planetary rotation system B.
Planetary gear system: the planetary gear system comprises two systems, namely a planetary rotating system A and a planetary rotating system B.
The planetary rotation system a includes a carrier A3, a planetary master gear A7, a planetary slave gear A9, and a spline shaft A8, the planetary master gear A7 and the planetary slave gear A9 are mounted on the spline shaft A8, the spline shaft A8 is supported on the carrier A3 by a bearing iii 23, and the carrier A3 is supported on the output end flange A2 and the end cover 11 by a bearing I21, constituting the planetary rotation system a. The planet carrier A3 comprises a front part and a rear part which are respectively arranged at two ends of the planet rotating system A, one end of the planet carrier A3 is arranged on the end cover 11 through a bearing, and the other end of the planet carrier A3 is arranged on the output end flange A2 through a bearing.
The planetary rotation system B includes a planet carrier B12, a planet master gear B14, a planet slave gear B17, and a spline shaft B18, the planet master gear B14 and the planet slave gear B17 are mounted on the spline shaft B18, the spline shaft B18 is supported on the planet carrier B12 and the output shaft 20 through a bearing v 27, the planet carrier B12 and the output shaft 20 are mounted on the end cover 11 and the output end flange B19 through a bearing VII29, respectively, and the planetary rotation system B is configured. The planet carrier B12 comprises a front part and a rear part and is respectively positioned at two ends of the planet rotating system B, one end of the planet carrier B12 is arranged on the end cover 11 through a bearing, and the other end of the planet carrier B12 is arranged on the output end flange B19 through a bearing.
The planetary main gear, the planetary driven gear and the spline shaft are 2-4, most of which are 3.
An output system: the output system comprises three output systems of an output system A, an output system B and an output shaft 20, and the three output ends are coaxially arranged with the input gear shaft, so that coaxial input and coaxial output can be realized.
The output system A comprises an output end flange A2 and a rotating internal gear A4, and the output end flange A2 is fixedly connected with the rotating internal gear A4 and then supported on the shell 5 through a double-row crossed roller bearing 24 to form a reducer output end I.
The output system B comprises an output end flange B19 and a rotating internal gear B16, wherein the output end flange B19 is fixedly connected with the rotating internal gear B16 and then supported on the shell 5 through a double-row crossed roller bearing 24 to form a reducer output end II.
The output shaft 20, which is part of the planetary carrier of the planetary rotation system B, is supported on the housing 5 via a bearing iii 23, so that the rotational movement of the planetary carrier B12 can be output, which constitutes the output shaft iii of the reduction gear.
According to the structural description of the reducer, the working process of the reducer is briefly described as follows:
the motion is input by the input gear shaft 1, and drives the planet main gear A7 in the planet rotating system A to do planet rotating motion, and because the planet slave gear A9 and the planet main gear A7 are arranged on the same shaft through splines, the planet main gear A7 and the planet slave gear A9 have the same motion; since there is a certain difference in the number of teeth between the fixed internal gear a 10 and the rotating internal gear A4, the rotating internal gear A4 generates a low-speed rotational movement while meshing with the planetary main gear A7, and the low-speed rotational movement is output through the output end flange A2.
The input gear B26 is arranged on the input gear shaft 1 and is used as the input end of the planetary rotation system B, the planetary main gear B14 and the planetary driven gear B17 are driven to do planetary rotation motion, different rotating speeds are obtained on the planet carrier B12 and the rotating internal gear B16 in the planetary rotation system B through the planetary transmission principle and the small tooth difference transmission principle, the two rotating motions are output through the output shaft 20 and the output end flange B19 respectively, and therefore two rotating motions with different speed ratios are obtained.

Claims (7)

1. A multi-speed ratio compound output speed reducer comprises a shell (5), and is characterized in that: the input gear system, the planetary rotating system and the output system are arranged in the inner cavity of the shell (5);
the planetary rotation system comprises a planetary rotation system A and a planetary rotation system B; the output system comprises an output system A, an output system B and an output shaft (20);
the input gear system comprises an input gear shaft (1) with an input gear A (15), an input gear B (26) for driving a planetary rotation system B, the input gear B (26) is mounted at the rear end of the input gear A (15);
a fixed internal gear A (10) matched with the planetary rotating system A, a fixed internal gear B (13) matched with the planetary rotating system B and an end cover (11) used as a supporting piece are arranged on the inner side of the shell (5); the end cover (11) is arranged between the fixed internal gear A (10) and the fixed internal gear B (13) and divides the inner cavity of the shell (5) into two parts;
the planetary rotation system A comprises a planet carrier A (3), N planetary main gears A (7), N planetary driven gears A (9) and N spline shafts A (8); the N planetary main gears A (7) are simultaneously meshed with the input gear A (15) and the fixed internal gear A (10), the planetary main gears A (7) and the planetary driven gears A (9) are installed on the spline shaft A (8), the planetary driven gears A (9) are located at the front ends of the planetary main gears A (7), the spline shaft A (8) is installed on the planet carrier A (3) through a bearing, and one end of the planet carrier A (3) is installed on the end cover (11) through a bearing;
the output system A comprises an output end flange A (2) and a rotary internal gear A (4); the rotating internal gear A (4) is meshed with the N planetary slave gears A (9) at the same time, and the rotating internal gear A (4) is installed on the machine shell (5) through a crossed roller bearing (24); the output end flange A (2) is fixed on the outer end face of the rotary internal gear A (4), and the output end flange A (2) is positioned at one end of the machine shell (5); the other end of the planet carrier A (3) is mounted on the output end flange A (2) through a bearing;
the planetary rotation system B comprises a planet carrier B (12), N planetary main gears B (14), N planetary driven gears B (17) and N spline shafts B (18); the N planetary main gears B (14) are simultaneously meshed with the input gear B (26) and the fixed internal gear B (13), the planetary main gears B (14) and the planetary slave gears B (17) are installed on the spline shaft B (18), the planetary slave gears B (17) are located at the rear ends of the planetary main gears B (14), the spline shaft B (18) is installed on the planet carrier B (12) through a bearing, and one end of the planet carrier B (12) is installed on the end cover (11) through a bearing;
the output system B comprises an output end flange B (19) and a rotary internal gear B (16); the rotating internal gear B (16) is meshed with the N planetary slave gears B (17) at the same time, and the rotating internal gear B (16) is installed on the machine shell (5) through a crossed roller bearing (24); the output end flange B (19) is fixed on the outer end face of the rotary internal gear B (16), and the output end flange B (19) is positioned at the other end of the machine shell (5); the other end of the planet carrier B (12) is mounted on the output end flange B (19) through a bearing;
the output shaft (20) is fixedly connected with the planet carrier B (12) and is installed on the machine shell (5) through a bearing.
2. The multi-ratio compound output reduction gear of claim 1, wherein: the crossed roller bearing (24) is fixed on the shell (5) through a bearing ring (6).
3. The multi-ratio compound output reduction gear of claim 2, wherein: the rotary internal gear A (4) is arranged on the machine shell (5) through two rows of crossed roller bearings (24).
4. The multi-ratio compound output reduction gear of claim 3, wherein: and the N is 2-4.
5. The multi-ratio compound output reduction gear of claim 4, wherein: the end cover (11) is fixed on the shell (5) through screws.
6. The multi-ratio compound output reduction gear of claim 5, wherein: the output end flange A (2) and the rotary internal gear A (4) are fixed through screws.
7. The multi-ratio compound output reduction gear of claim 6, wherein: the output end flange B (19) and the rotary internal gear B (16) are fixed through screws.
CN201911268688.0A 2019-12-11 2019-12-11 Multi-speed-ratio compound output speed reducer Pending CN110905975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911268688.0A CN110905975A (en) 2019-12-11 2019-12-11 Multi-speed-ratio compound output speed reducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911268688.0A CN110905975A (en) 2019-12-11 2019-12-11 Multi-speed-ratio compound output speed reducer

Publications (1)

Publication Number Publication Date
CN110905975A true CN110905975A (en) 2020-03-24

Family

ID=69824802

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911268688.0A Pending CN110905975A (en) 2019-12-11 2019-12-11 Multi-speed-ratio compound output speed reducer

Country Status (1)

Country Link
CN (1) CN110905975A (en)

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