CN212131209U

CN212131209U - Speed reducer

Info

Publication number: CN212131209U
Application number: CN202020684191.9U
Authority: CN
Inventors: 马墉良
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-12-11
Anticipated expiration: 2030-04-28

Abstract

The utility model relates to the technical field of speed reduction transmission devices, in particular to a speed reducer, which comprises an input shell, an output shell, a mounting bracket and a planetary wheel set arranged on the mounting bracket; the mounting bracket comprises a disc body, at least one group of support arms spirally distributed on the outer diameter of the disc body, a planetary wheel set is mounted on at least one group of support arms, and a groove is formed in the connecting position of the support arms and the disc body; the planetary wheel set comprises a transmission shaft, a first planetary gear and a second planetary gear which are transmitted to the transmission shaft, the first planetary gear is in transmission connection with the input shell, and the second planetary gear is in transmission connection. The utility model discloses a set up the fluting at support arm and installing support junction and increase the flexibility of planetary wheel set meshing, open through the fluting and make planetary wheel set's meshing precision improve with the closure to reduce the wearing and tearing of installing support.

Description

Speed reducer

Technical Field

The utility model relates to a speed reduction gear technical field especially relates to a speed reducer.

Background

The reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine. The function of matching the rotation speed and transmitting the torque between the prime mover and the working machine or the actuating mechanism is very extensive in modern machinery.

The general speed reducers include gear reducers, planetary gear reducers, cycloidal pin gear reducers, worm and gear reducers, planetary friction type mechanical stepless speed changers and harmonic wave reducers.

The worm gear speed reducer is mainly characterized by having a reverse self-locking function and a larger speed reduction ratio, and an input shaft and an output shaft are not on the same axis nor on the same plane; the speed-reducing mechanism has the disadvantages of large volume, low transmission efficiency and low precision, and the speed-reducing principle and the self-locking function of the speed-reducing mechanism are realized by friction force due to the structure, so the service life is short.

The harmonic transmission of the harmonic speed reducer utilizes the controllable elastic deformation of the flexible element to transmit motion and power, has small volume and high precision, but has the defects of limited service life of the flexible gear, impact resistance, poor rigidity compared with a metal part, not high input rotating speed, complex manufacturing process and high manufacturing cost.

The planetary reducer has the advantages of compact structure, small return clearance, high precision, long service life and large rated output torque; the defects are that the reduction ratio is small, the minimum of single-stage reduction is 3, the maximum of single-stage reduction is generally not more than 10, the reduction precision is reduced by one time when each stage of reduction is added, and the volume is increased.

The cycloidal pin gear speed reducer has the advantages that the transmission is stable, the precision is high, the reduction ratio can be 87 in a single stage, the size of the cycloidal pin gear speed reducer with the same power can be a little smaller, and the cycloidal pin gear speed reducer is a little more precise than a turbine speed reducer; the cycloidal pin gear speed reducer has the disadvantages that the load of the cycloidal pin gear speed reducer cannot be too large, and the central shaft inside the cycloidal pin gear speed reducer is most easy to break and troublesome to disassemble and assemble no matter how large the cycloidal pin gear speed reducer is; main parts such as the cycloid wheel, the pin gear pin, the pin gear sleeve, the pin and the pin sleeve are all made of GCrl5 bearing steel with good materials, and some parts have high requirements on manufacturing accuracy and complex manufacturing process. The rotating arm bearing has larger bearing force, and the rotating speed is slightly higher than that of the high-speed shaft, so the rotating arm bearing is a weak link of the speed reducer, and the rotating speed and the transmitted power of the high-speed shaft are limited.

The speed reducer of the industrial robot is a key part and is also a quick-wear part, the current traditional industrial robot has insufficient precision and short service life, and is high in cost, namely the problem of the speed reducer, the traditional speed reducer has a complex structure and low meshing precision, the abrasion of equipment can be increased in the actual use process, and the service life of the robot is limited.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a speed reducer for matching rotation speed and transmitting torque between a prime mover and a working machine or an actuator, in response to the problems of the conventional art at present.

A reducer, comprising: the planetary gear set comprises an input shell, an output shell, a mounting bracket and a planetary gear set mounted on the mounting bracket; the mounting bracket comprises a disc body, at least one group of support arms spirally distributed on the outer diameter of the disc body, a planetary wheel set is mounted on at least one group of support arms, and a groove is formed in the connecting position of the support arms and the disc body; the planetary wheel set comprises a transmission shaft, a first planetary gear and a second planetary gear which are transmitted to the transmission shaft, the first planetary gear is in transmission connection with the input shell, and the second planetary gear is in transmission connection.

In one embodiment, the input housing inner diameter is provided with a first ring gear, which is meshed with the first planetary gears.

In one embodiment, the output housing inner diameter is provided with a second ring gear, which is meshed with the second planetary gears.

In one embodiment, the mounting bracket includes a central shaft, a first bearing disposed between the mounting bracket and the input housing, and a second bearing disposed between the mounting bracket and the output housing.

In one embodiment, the output housing comprises a fixed seat and a fastener, wherein the fastener is mounted on the fixed seat and connected with the second planetary gear.

In one embodiment, the fastener is provided with an outer shell; the outer shell is connected with the fastener through a fixing bolt.

In one embodiment, a mounting cavity is formed between the outer shell and the input shell, and a third bearing is arranged in the mounting cavity.

In one embodiment, the fastening member is connected to the fixing seat and the outer housing respectively by a fixing bolt.

In one embodiment, the number of the slots is two, and the width of the slots is 0.1 mm-0.5 mm.

In one embodiment, the support arms are at least arranged in two groups and are circumferentially and uniformly distributed on the outer diameter of the disc body, and each group of support arms is provided with a planetary wheel set.

The utility model has the advantages as follows:

the utility model is provided with a speed reducer, an input shell, an output shell, a mounting bracket and a planetary wheel set mounted on the mounting bracket, because the main shaft and the mounting bracket rotate synchronously, the rotating speed requirement on the main shaft of the motor is reduced, the speed reducer can be used with a cheaper conventional motor, the input cost of the motor is lower, the cost performance is higher, the size is 20% of other speed reducers with the same power, and the speed reduction transmission is more stable; the mounting bracket comprises a disc body, at least one group of support arms spirally distributed on the outer diameter of the disc body, a planetary wheel set is mounted on at least one group of support arms, and a groove is formed in the connecting position of the support arms and the disc body; the planet wheelset includes a transmission shaft, the transmission in the first planetary gear and the second planetary gear of transmission shaft, first planetary gear with input casing transmission is connected, second planetary gear transmission is connected, and the transmission efficiency is high, and in the actual work process, first planetary gear and input casing intermeshing, second planetary gear and output casing intermeshing increase the flexibility that the planet wheelset meshed through set up the fluting in support arm and installing support junction, make the meshing precision of planet wheelset improve through the fluting open with closed to reduce the wearing and tearing of installing support, reduce energy consumption and cost of manufacture, be applicable to the robot, aerospace and national defense is equipped.

Drawings

Fig. 1 is a sectional view of the speed reducer of the present invention;

fig. 2 is a schematic view of a combination structure of the mounting carrier and the planetary gear set of fig. 1.

Description of reference numerals: the planetary gear transmission comprises an input shell 10, a first ring gear 11, an output shell 20, a fixed seat 21, a fastener 22, a second ring gear 23, a planetary gear set 40, a first planetary gear 41, a second planetary gear set 42, a transmission shaft 43, a mounting bracket 50, a supporting arm 51, a slot 52, a central shaft 53, a disc body 54, a first bearing 55, a second bearing 56, an outer shell 60 and a third bearing 61.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully below. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 2, a speed reducer according to an embodiment of the present invention is used for matching a rotation speed and a transmission torque between a prime mover and a working machine or an actuator. In this embodiment, the speed reducer includes an input housing 10, an output housing 20, a mounting bracket 50 and a planetary gear set 40 mounted on the mounting bracket 50, where the mounting bracket 50 includes a disc body 54 and at least one set of support arms 51 spirally distributed on the outer diameter of the disc 54, the planetary gear set 40 is mounted on the at least one set of support arms 51, a slot 52 is formed at a connection position of the support arms 51 and the disc body 54, and in this embodiment, the slot 52 is an arc-shaped slot 52; the support arms 51 are at least provided with two groups of supporting arms 51 which are circumferentially and uniformly distributed on the outer diameter of the disc body 54, and each group of supporting arms 51 are provided with the planetary wheel set 40.

In the present embodiment, the input housing 10 is a hollow cylindrical housing provided with an opening for protecting the internal transmission element; the input housing 10 is provided with a first ring gear 11 at an inner diameter.

Referring to fig. 1, the output housing 20 includes a fixing base 21 and a fastening member 22 mounted on the fixing base 21; in the present embodiment, the fastening member 22 has a hollow cylindrical shape, the hollow portion of the fastening member 22 is used for limiting the planetary gear set 40, and the inner diameter of the output housing 20 is provided with the second ring gear 23.

The number of the planetary gear sets 40 is two, and the planetary gear set 40 includes a transmission shaft 43, a first planetary gear 41 and a second planetary gear 42 which are transmitted to the transmission shaft 43, wherein the first planetary gear 41 is in transmission connection with the input housing 10, and the second planetary gear 42 is in transmission connection with the input housing.

The first planetary gears 41 are engaged with the first ring gear 11 and rotate the input housing 10, and the second planetary gears 42 are engaged with the second ring gear 23 and rotate the output housing 20.

Referring to fig. 2, the mounting bracket 50 includes a central shaft 53, a first bearing 55 disposed between the mounting bracket 50 and the input housing 10, and a second bearing 56 disposed between the mounting bracket 50 and the output housing 20, in this embodiment, the number of the slots 52 is two, the width of the slot 52 is 0.1mm to 0.5mm, the flexibility of meshing the planetary gear set 40 is increased by providing two sets of slots 52, the meshing accuracy of the planetary gear set 40 is improved by opening and closing the slots 52, and the wear of the mounting bracket 50 is reduced.

Referring to fig. 1 again, the reducer further includes an outer housing 60, the outer housing 60 is connected to the fastening member 22 through a fixing bolt, a mounting cavity is formed between the outer housing 60 and the input housing 10, and a third bearing 61 is disposed in the mounting cavity.

The utility model discloses a speed reducer is used for matching rotational speed and transmission torque between prime mover and working machine or actuating mechanism and realizes the purpose of speed reduction, fix and support planetary gear set 40 through set up transmission shaft 43 on installing support 50, the supporting effect is good, first planetary gear 41 and input casing 10 intermeshing, second planetary gear 42 and output casing 20 intermeshing, through set up circular-arc fluting 52 in support arm 51 and installing support 50 junction and increase the flexibility that planetary gear set 40 meshed, make planetary gear set 40's meshing precision improve with the closure through opening of circular-arc fluting 52, and reduce the wearing and tearing of installing support 50, increase the life of speed reducer.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A speed reducer, comprising: the planetary gear set comprises an input shell, an output shell, a mounting bracket and a planetary gear set mounted on the mounting bracket; the mounting bracket comprises a disc body, at least one group of support arms spirally distributed on the outer diameter of the disc body, a planetary wheel set is mounted on at least one group of support arms, and a groove is formed in the connecting position of the support arms and the disc body; the planetary wheel set comprises a transmission shaft, a first planetary gear and a second planetary gear which are transmitted to the transmission shaft, the first planetary gear is in transmission connection with the input shell, and the second planetary gear is in transmission connection.

2. The speed reducer of claim 1, wherein the input housing inner diameter is provided with a first annulus gear that meshes with the first planetary gears.

3. The reducer according to claim 1, wherein the output housing inner diameter is provided with a second annulus gear that meshes with the second planetary gears.

4. The reducer of claim 1, wherein the mounting bracket includes a central shaft, a first bearing disposed between the mounting bracket and the input housing, and a second bearing disposed between the mounting bracket and the output housing.

5. The reducer according to claim 1, wherein the output housing includes a fixing base, and a fastening member that is attached to the fixing base and is connected to the second planetary gear.

6. The reducer according to claim 5, wherein an outer housing is mounted on the fastener; the outer shell is connected with the fastener through a fixing bolt.

7. The reducer according to claim 6, wherein a mounting cavity is formed between the outer housing and the input housing, and a third bearing is disposed in the mounting cavity.

8. The reducer according to claim 7, wherein the fasteners are connected to the fixing base and the outer housing respectively by fixing bolts.

9. The speed reducer according to claim 1, wherein the number of the slots is two, and the width of the slots is 0.1mm to 0.5 mm.

10. The reducer according to claim 1, wherein the at least two sets of support arms are circumferentially and uniformly distributed on the outer diameter of the disc body, and each set of support arms is provided with a planetary wheel set.