CN218267042U

CN218267042U - Duplex planetary reducer

Info

Publication number: CN218267042U
Application number: CN202221966852.2U
Authority: CN
Inventors: 周利中
Original assignee: Dongguan Zhuolan Automation Equipment Co ltd
Current assignee: Dongguan Zhuolan Automation Equipment Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-01-10
Anticipated expiration: 2032-07-28

Abstract

The utility model provides a duplex planetary reducer, which comprises an input flange, a lock ring, an input shaft, a planet carrier, an inner gear ring and a duplex planetary assembly; the locking ring is fixed on the left side of the input flange; the inner gear ring is fixed in the input flange; the planet carrier is rotatably connected to the inner sides of the input flange and the locking ring through a bearing; the input shaft is arranged in the center of the planet carrier; the center of the input shaft is provided with a hollow hole; the input shaft is connected with a sun gear; the duplex planetary assemblies are arranged in at least two groups and comprise first gears, rolling pins and second gears; the first gear is mounted on the planet carrier through a roller pin; the first gear is meshed with the inner gear ring; an inner tooth hole matched with the first gear is formed in the center of the second gear; the second gear is installed on one side of the first gear in a press fit mode through the inner tooth hole; the second gear is meshed with the sun gear; embodies the utility model discloses can increase the well orifice and excessively cross the line, transmission precision is high moreover.

Description

Duplex planetary reducer

Technical Field

The utility model relates to a planetary reducer technical field, in particular to pair planetary reducer.

Background

Planetary reducer is used for reducing the speed of input and carry out the output, according to the actual demand, the specification of product can be injectd, and under the restriction of ring gear external diameter, the input shaft still needs to satisfy the cavity hole of certain size and is used for crossing the line, lead to the less novel speed reducer of specification, ordinary planetary reducer can't satisfy these two conditions usually, lead to the cavity hole undersize of input shaft, there is the defect that is difficult to cross the line during assembly, consequently need adopt pair planetary reducer, and in present pair planetary reducer, what adopt between two pair gears is that keyway cooperation or shaft hole press fit etc. mode are connected, in a long-term time, still can have certain clearance between the two, lead to the precision to reduce, consequently still need improve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pair planetary reducer mentions the problem in order to solve the background art.

In order to achieve the above object, the present invention provides the following technical solutions:

a duplex planetary reducer comprises an input flange, a locking ring, an input shaft, a planet carrier, an inner gear ring and a duplex planetary assembly; the lock ring is fixed on the left side of the input flange; the inner gear ring is fixed in the input flange; the planet carrier is rotationally connected to the inner sides of the input flange and the lock ring through a bearing; the input shaft is arranged in the center of the planet carrier; the center of the input shaft is provided with a hollow hole; the input shaft is connected with a sun gear; the duplex planetary assembly is provided with at least two groups, including a first gear, a roller pin and a second gear; the first gear is mounted on the planet carrier through a roller pin; the first gear is meshed with the inner gear ring; an inner tooth hole matched with the first gear is formed in the center of the second gear; the second gear is installed on one side of the first gear in a press fit mode through the inner tooth hole; the second gear is engaged with the sun gear.

For further description of the present invention, the left side of the input flange is provided with a mounting groove; and the outer ring of the bearing is arranged in the mounting groove and is pressed and fixed through a lock ring.

For the further description of the utility model, the planet carrier is a split planet carrier; the center of the planet carrier is provided with a shaft hole and four windows connected to the periphery of the shaft hole; the window extends out of the right side of the input flange; the duplex planetary assemblies are arranged in four groups and are respectively arranged in corresponding windows; the second gear is installed on the right side of the first gear in a press fit mode.

To the further description of the present invention, an oil seal is installed between the lock ring and the planet carrier.

The utility model has the advantages that:

the utility model discloses an adopt pair planet subassembly to carry out the transmission, under the circumstances that the internal gear ring external diameter is injectd, compare with NGW type speed reducer, under the same modulus, the outer number of teeth of sun gear can set up more, thereby the reference circle radius is bigger, reserve more spaces for setting up of cavity hole in the input shaft and be used for crossing the line, and the second gear in pair planet subassembly is installed in first gear one side through internal tooth hole pressure fit in this design moreover, both are fixed stable, and the zero clearance, the transmission precision is high, long-term use can not produce the clearance yet, realize the transmission of zero back clearance.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

fig. 3 is a structural diagram of the inner gear ring, the duplex planetary assembly and the input shaft of the present invention;

FIG. 4 is a structural view of a second gear of the present invention;

fig. 5 is a structural diagram of the carrier of the present invention.

Detailed Description

The invention is further explained below with reference to the drawings:

as shown in fig. 1-5, a duplex planetary reducer comprises an input flange 1, a lock ring 2, an input shaft 3, a planet carrier 4, an inner gear ring 5 and a duplex planetary assembly 6; the locking ring 2 is fixed on the left side of the input flange 1; the inner gear ring 5 is fixed in the input flange 1; the planet carrier 4 is rotatably connected to the inner sides of the input flange 1 and the locking ring 2 through a bearing 7; the input shaft 3 is arranged in the center of the planet carrier 4; the center of the input shaft 3 has a hollow hole 31; the input shaft 3 is connected with a sun gear 8, and in the design, the sun gear 8 is integrally formed on the input shaft 3; the duplex planetary assembly 6 is provided with at least two groups, including a first gear 61, a roller pin 62 and a second gear 63; the first gear 61 is mounted on the planet carrier 4 through a needle roller 62; the first gear 61 is meshed with the inner gear ring 5; the center of the second gear 63 is provided with an internal tooth hole 631 matched with the first gear 61; the second gear 63 is press-fitted to one side of the first gear 61 through an inner gear hole 631; the second gear 63 meshes with the sun gear 8;

the calculation formula of the transmission ratio in the design is i ₁ =1+ (inner gear ring 5 teeth number Z _B * Number of teeth Z of first gear 61 _C ) /(Sun gear 8 teeth number Z _A * Number Z of teeth of second gear 63 _D ) Setting Z _A Is 24,Z _B Is 108,Z _C Is 50,Z _D Is 32, then i ₁ ＝1+(108*50)/(32*24)＝8.03125。

The NGW type speed reducer is directly meshed with the sun gear and the inner gear ring through the planet gear, and the transmission ratio calculation formula i ₂ =1+ ring gear teeth number Z _B Sun gear tooth number Z _A Set Z _A Is 15,Z _B Is 105, then i ₂ ＝1+105/15＝8。

Compared with the prior art, the specifications of the inner gear ring 5 are close, the transmission ratio is close, but the number of teeth of the sun gear 8 in the design is larger than that of teeth of the NGW type, and under the same modulus, according to the modulus calculation formula m = reference circle diameter/number of teeth, the number of teeth is more, the diameter of the reference circle is larger, so that more space can be reserved for the hollow hole 31 in the input shaft 3, the hollow hole 31 is larger, and the wire passing is facilitated.

In addition, in the design, the second gear 63 in the duplex planetary assembly 6 is arranged on one side of the first gear 61 in a press fit mode through the inner tooth hole 631, the two gears are fixed stably and have no clearance, the transmission precision is high, no clearance is generated after long-term use, and zero backlash transmission is realized.

In the design, the left side of the input flange 1 is provided with an installation groove; the outer ring of bearing 7 is installed in the mounting groove and fixed through 2 roof presses of catch, convenient assembling, and stability is high.

The planet carrier 4 is a split planet carrier 4; the center of the planet carrier 4 is provided with a shaft hole 41 and four windows 42 connected to the periphery of the shaft hole 41; the window 42 extends out to the right side of the input flange 1; the duplex planetary assemblies 6 are arranged in four groups and are respectively arranged in the corresponding windows 42; the second gear 63 is press-fitted to the right side of the first gear 61 such that the second gear 63 is located outside the ring gear 5 and engages with the sun gear 8.

And an oil seal is arranged between the lock ring 2 and the planet carrier 4, so that the sealing performance is improved.

The above description is not intended to limit the technical scope of the present invention, and any modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a pair planetary reducer which characterized in that: the double-connection planetary gear set comprises an input flange, a lock ring, an input shaft, a planet carrier, an inner gear ring and a double-connection planetary assembly; the locking ring is fixed on the left side of the input flange; the inner gear ring is fixed in the input flange; the planet carrier is rotationally connected to the inner sides of the input flange and the lock ring through a bearing; the input shaft is arranged in the center of the planet carrier; the center of the input shaft is provided with a hollow hole; the input shaft is connected with a sun gear; the duplex planetary assembly is provided with at least two groups, including a first gear, a roller pin and a second gear; the first gear is mounted on the planet carrier through a roller pin; the first gear is meshed with the inner gear ring; an inner tooth hole matched with the first gear is formed in the center of the second gear; the second gear is installed on one side of the first gear in a press fit mode through the inner tooth hole; the second gear is engaged with the sun gear.

2. The double planetary reducer according to claim 1, wherein: an installation groove is formed in the left side of the input flange; and the outer ring of the bearing is arranged in the mounting groove and is pressed and fixed through a lock ring.

3. The double planetary reducer according to claim 1, wherein: the planet carrier is a split planet carrier; the center of the planet carrier is provided with a shaft hole and four windows connected to the periphery of the shaft hole; the window extends out of the right side of the input flange; the duplex planetary assemblies are arranged in four groups and are respectively arranged in the corresponding windows; the second gear is installed on the right side of the first gear in a press fit mode.

4. The double planetary reducer according to claim 1, wherein: and an oil seal is arranged between the lock ring and the planet carrier.