CN213839452U

CN213839452U - Planetary gear reduction box

Info

Publication number: CN213839452U
Application number: CN202121491574.5U
Authority: CN
Inventors: 马红军
Original assignee: Cixi Jingma Power Machinery Co ltd
Current assignee: Cixi Jingma Power Machinery Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-07-30
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a planetary gear reduction box, which is provided with an input shaft and three output shafts, wherein the input shaft is connected with a motor, the input shaft is driven by the motor to rotate, and then the input shaft drives the three output shafts to rotate simultaneously, in particular, a worm gear structure, a planetary gear set structure and a bevel gear structure are arranged in the planetary gear reduction box, the input shaft is a worm, a worm gear is sleeved on a planetary arm of the planetary gear set, the worm gear is driven by the worm to rotate, so as to drive the planetary arm to rotate, an inner gear ring is arranged inside the planetary arm, a sun gear and a planet gear are arranged in the inner gear ring, the sun gear is arranged at the center of the inner gear ring, the planet gear is arranged around the sun gear and is simultaneously meshed with the inner gear ring and the sun gear, the first output shaft is inserted on the sun gear, a bevel gear is also arranged on the planetary arm, and bevel gears are sleeved on a second output shaft and a third output shaft, the second output shaft and the third output shaft are driven to rotate through the meshing relation of the bevel gears.

Description

Planetary gear reduction box

Technical Field

The utility model relates to a speed reducer technical field, more specifically the utility model relates to a planetary gear reducing gear box that says so.

Background

In the prior art, a motor with a planetary gear reduction box is disclosed in the chinese utility model with patent application No. CN200820167685.9, which comprises a motor body and a planetary gear reduction box, the planetary gear reduction box comprises an inner gear ring used as a box body and a front end cover and a rear end cover respectively matched with the front end and the rear end of the inner gear ring, a rotary support is arranged between an output shaft and the front end cover, one end of the output shaft is positioned in the inner gear ring and formed into a planet carrier, the other end of the output shaft extends out of the front end cover, one end of a plurality of planetary gear shafts is fixed with the planet carrier, a rolling bearing is arranged between the planetary gear shaft and the planetary gear, the outer ring of the rolling bearing is fixed with the planetary gear, the inner ring of the rolling bearing is fixed with the planetary gear shaft, the two ends of the inner ring are higher than the two end faces of the planetary gear, the other end of the planetary gear shaft is fixed with a fixed plate, the diameter of the fixed plate is smaller than the minimum inner diameter of the inner gear ring, the fixed plate and the inner end face of the rear end cover are spaced, and one end face of the inner ring of the rolling bearing is in contact with the fixed plate.

The planetary gear reducing gear box of motor disclosed in the above-mentioned patent, it relies on planetary gear set's meshing relation to carry out the transmission completely, because the output shaft rotational speed of motor is very fast, this makes at the in-process that slows down, comparatively violent collision can take place for sun gear and planet wheel among the planetary gear set, produce great noise, and the size between sun gear and the planet wheel among the planetary gear set has great difference, this can lead to both to take place to shake in the transmission process, make the transmission unstable, in addition, planetary gear reducing gear box in the above-mentioned patent, only can realize unipolar output, the efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a low, the transmission of noise is steady and can realize the planetary gear reducing gear box of multiaxis output.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a planetary gear reduction box comprises a power input box body, a first output box body and a second output box body which are mutually communicated, the power input box body is inserted with an input shaft, the end part of one end of the input shaft is connected with an external driving mechanism and is driven by the external driving mechanism to rotate, the input shaft is a worm, helical teeth are formed on the middle section of the worm, the middle section of the worm is positioned in the power input box body, a first output shaft is inserted on the first output box body, a planetary gear set is arranged in the first output box body and comprises a planetary arm, the first output shaft is inserted in the planetary arm, a worm wheel is sleeved on the outer wall of the planet arm, helical teeth are also formed on the outer ring of the worm wheel, the worm wheel is meshed with the worm, and the worm drives the worm wheel to rotate so as to drive the planet arm to rotate;

the outer wall of the planet arm is also sleeved with a first bevel gear, the first bevel gear is positioned below the worm wheel, a second output shaft and a third output shaft are inserted into the second output box body, the second output shaft is sleeved with a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

As the utility model discloses a preferred the cover is equipped with the third bevel gear on the third output shaft, first bevel gear and third bevel gear meshing.

As the utility model discloses an improvement, the ring gear is being fixed on the planet arm inner wall the sun gear is being established to the cover on the first output shaft, the sun gear with the ring gear sets up with one heart the sun gear with be provided with a plurality of planet wheels between the ring gear, the planet wheel simultaneously with the sun gear with the ring gear meshing, when the planet arm rotates, can drive the ring gear and rotate, and then drive the sun gear and rotate, drive first output shaft by the sun gear again and rotate.

As a further improvement of the utility model, second output shaft and third output shaft are in the inside of second output box body links to each other through the shaft coupling.

As a specific technical scheme of the utility model be provided with round heat radiation fins on the outer wall of first output box.

Compared with the prior art, the scheme has the beneficial effects that: the input shaft is the worm, utilizes the worm gear structure to carry out the one-level speed reduction, and worm drive is equivalent to screw drive, for many tooth meshing transmission, so the transmission is steady, the noise is very little, can reduce the noise of whole reducing gear box and vibrate, in addition, the utility model provides a gear reduction box has three output shaft, and output after first output shaft passes through the reduction of speed of planetary gear reducing gear box, and output after second and third output shaft pass through intermeshing's bevel gear speed reduction utilizes an input shaft to drive three output shafts simultaneously promptly, has improved efficiency and application scope wider.

Drawings

FIG. 1 is a schematic view of an external structure of a planetary gear reduction gearbox in an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the planetary gear reduction gearbox of FIG. 2;

fig. 4 is a schematic diagram of the internal structure of the first output box of the planetary gear reduction box according to the embodiment of the present invention.

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying fig. 1-4 by way of specific embodiments, which are only illustrative and not limiting of the scope of the present invention.

The embodiment discloses a planetary gear reduction box, which comprises a power input box body 1, a first output box body 2 and a second output box body 3, wherein the power input box body 1, the first output box body 2 and the second output box body are mutually communicated, an input shaft 4 is inserted into the power input box body 1, the input shaft 4 is connected with an external driving mechanism such as a motor, and the motor drives the input shaft 4 to rotate at a high speed. The input shaft 4 is a worm, the middle section of the worm (input shaft) is entirely positioned in the power input box 1, the middle section of the worm is provided with spiral helical teeth 41, the first output shaft 5 is inserted in the first output box 2, the first output shaft 5 is sleeved with a planet arm 6 through a bearing sleeve, the outer wall of the planet arm 6 is sleeved with a worm wheel 7, the outer ring of the worm wheel 7 is provided with a circle of external teeth, the worm wheel 7 is meshed with the worm, when the worm rotates under the driving of a motor, the worm wheel 7 can be driven to rotate, the number of teeth of the worm wheel 7 is far more than that of the worm, so the worm can drive the worm wheel 7 to rotate for a circle after rotating for multiple circles, thereby realizing primary speed reduction, the worm and gear transmission is equivalent to spiral transmission, and is multi-tooth meshed transmission, so the transmission is stable, the noise is very small, and the noise of the whole reduction box can be reduced and the vibration.

When the worm wheel 7 rotates, the planet arm 6 can be driven to rotate at the same speed, a first bevel gear 8 is further sleeved at the bottom of the planet arm 6, when the planet arm 6 rotates, the first bevel gear 8 can be driven to rotate, the first bevel gear 8 is located in the second output box 3, a second output shaft 9 and a third output shaft 10 are further inserted into two sides of the second output box 3, the second output shaft 9 and the third output shaft 10 are connected in the second output box 3 through a coupler 11, and due to the structure of the coupler 11, the second output shaft 9 and the third output shaft 10 can be linked with each other. Namely, a bevel gear engaged with the first bevel gear 8 can be sleeved on at least one of the second output shaft 9 and the third output shaft 10 to realize linkage.

In this embodiment, preferably, the second bevel gear 12 is sleeved on the second output shaft 9, the third bevel gear 13 is sleeved on the third output shaft 10, the first bevel gear 8 is simultaneously engaged with the second bevel gear 12 and the third bevel gear 13, when the first bevel gear 8 rotates, the second bevel gear 12 and the third bevel gear 13 can be driven to rotate, by setting the gear ratio of the first bevel gear 8 to the second bevel gear 12 and the third bevel gear 13, the secondary speed reduction can be realized, the second bevel gear 12 drives the second output shaft 9 to rotate, and the third bevel gear 13 drives the third output shaft 10 to rotate.

The planetary arm 6 is a hollow revolution body, an inner gear ring 14 is fixed on the inner wall of the planetary arm 6, the inner gear ring 14 can be driven to rotate along with the planetary arm 6 when the planetary arm 6 rotates, a sun wheel 15 is arranged in the center of the annular inner gear ring 14, the diameter of the sun wheel 15 is smaller than the inner diameter of the inner gear ring 14, therefore, an annular gap is formed between the sun wheel 15 and the inner gear ring 14, a plurality of planetary wheels 16 are arranged in the annular gap, the planetary wheels 16 are arranged around the sun wheel 15, and the planetary wheels 16 are simultaneously meshed with the sun wheel 15 and the inner gear ring 14. When the inner gear ring 14 rotates, the planet gears 16 can be driven to rotate, then the sun gear 15 is driven to rotate by the planet gears 16, the first output shaft 5 is fixed at the center of the sun gear 15, and when the sun gear 15 rotates, the first output shaft 5 can be driven to rotate and output outwards.

In addition, because the reduction gearbox generates more heat in the working process, in order to enlarge the heat dissipation area, a circle of heat dissipation fins 17 are arranged on the top surface of the first output box body 2.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A planetary gear reduction box is characterized in that: the power input box body, the first output box body and the second output box body are mutually communicated, an input shaft is inserted into the power input box body, the end part of one end of the input shaft is connected to an external driving mechanism and is driven to rotate by the external driving mechanism, the input shaft is a worm, helical teeth are formed in the middle section of the worm, the middle section of the worm is positioned in the power input box body, a first output shaft is inserted into the first output box body, a planetary gear set is arranged in the first output box body and comprises a planetary arm, the first output shaft is inserted into the planetary arm, a worm wheel is sleeved on the outer wall of the planetary arm, helical teeth are also formed on the outer ring of the worm wheel, the worm wheel is meshed with the worm, and the worm drives the worm wheel to rotate so as to drive the planetary arm to rotate;

2. A planetary gear reduction gearbox according to claim 1, characterized in that: and a third bevel gear is sleeved on the third output shaft, and the first bevel gear is meshed with the third bevel gear.

3. A planetary gear reduction gearbox according to claim 1, characterized in that: an inner gear ring is fixed on the inner wall of the planetary arm, a sun wheel is sleeved on the first output shaft, the sun wheel and the inner gear ring are concentrically arranged, a plurality of planet wheels are arranged between the sun wheel and the inner gear ring, the planet wheels are simultaneously meshed with the sun wheel and the inner gear ring, when the planetary arm rotates, the inner gear ring can be driven to rotate, the sun wheel is driven to rotate, and then the sun wheel drives the first output shaft to rotate.

4. A planetary gear reduction gearbox according to claim 3, wherein: and the second output shaft and the third output shaft are connected in the second output box body through a coupling.

5. A planetary gear reduction gearbox according to claim 1, characterized in that: and a circle of radiating fins are arranged on the outer wall of the first output box body.