CN212203051U

CN212203051U - Output mechanism based on NGWN I type planetary mechanism

Info

Publication number: CN212203051U
Application number: CN202020814356.XU
Authority: CN
Inventors: 淳进
Original assignee: Chengdu Feiya Airborne Equipment Application Research Co ltd
Current assignee: Chengdu Feiya Airborne Equipment Application Research Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-22
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses an output mechanism based on NGWN I type planetary mechanism, which comprises a frame, an input shaft, a plurality of planetary shafts and a sun gear Za, because the output mechanism needs to bear the overweight load, the overweight load distribution treatment is considered, the same transmission path is selected for comparison, the transmission of the utility model changes the stressed gear ring into the vertical symmetrical distribution, the output power is respectively provided by the gear rings Ze which are vertical symmetrical, thus the two sets of planetary gear trains are evenly stressed, and furthermore, under the condition of adopting the same gear matching parameters and not changing the transmission ratio, the planet shafts are stressed symmetrically, the eccentric load phenomenon is avoided, the transmission is stable, the output torque is uniform, the stress of the planet wheels and the output gear ring is reduced by outputting the same torque (the stress of 1/2 is reduced theoretically), the bearing capacity is greatly improved, and the maximum output torque can be improved by one time theoretically.

Description

Output mechanism based on NGWN I type planetary mechanism

Technical Field

The utility model relates to an output mechanism especially relates to an output mechanism based on NGWN I type planetary mechanism.

Background

In an output mechanism of an electromechanical integrated product, the product is often required to obtain a large transmission ratio in a certain space, and the final output torque is not less than 2000 N.m.

In a mechanical structure, only a gear transmission mechanism capable of meeting the requirements is usually realized by adopting an NGWN planetary transmission type as an output mechanism, but the existing NGWN planetary transmission type has limited bearing capacity, so that the maximum torque which can be output by the NGWN planetary transmission type is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an output mechanism based on NGWN I type planetary mechanism to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an output mechanism based on an NGWN I type planetary mechanism comprises a machine base, an input shaft, a plurality of planetary shafts and a sun gear Za, wherein two ends of the input shaft are rotatably connected with the machine base, the sun gear Za is arranged in the middle of the input shaft, a gear ring Zb is arranged on the outer side of the sun gear Za, a planetary frame is installed in the machine base in a floating mode, the planetary shafts are all arranged on the planetary frame, planetary gears ZC are arranged in the middle of the planetary shafts, the planetary gears ZC are all located between the sun gear Za and the gear ring Zb, and the sun gear Za, the planetary gears ZC and the gear ring Zb are meshed simultaneously;

the planet gear assembly is characterized in that planet gears ZD are arranged at two ends of the planet shaft, gear rings Ze are arranged at two ends of the input shaft, the gear rings Ze positioned on the same side are meshed with the planet gears ZD, and any one of the sun gear Za, the gear ring Zb and the gear rings Ze is fixed in the assembling process.

The number of the planetary shafts is seven, and the seven planetary shafts are distributed along the circumferential direction of the input shaft in an array mode.

The two ring gears Ze are symmetrically distributed about the sun gear Za.

And the outer end of the gear ring Ze is provided with a spline.

And the gear ring Zb is fixedly connected with the engine base.

The utility model has the advantages that:

because output mechanism need bear overweight load, consider to handle overweight load distribution, select same transmission path to contrast, the utility model discloses a transmission changes the atress ring gear into longitudinal symmetry distribution, output power is provided by longitudinal symmetry's ring gear Ze respectively, two sets of planetary gear system equipartition atresss like this, and then adopt same tooth parameter of joining in marriage, do not change under the condition of drive ratio, planet axle atress symmetry, no unbalance loading phenomenon, the transmission is steady, output torque is even, it has reduced the atress of planet wheel and output ring gear (reduce 1/2's atress in theory) to output same moment of torsion, has improved bearing capacity greatly, simultaneously theoretically it can also improve the maximum torque of output by one time.

Drawings

FIG. 1 is a schematic diagram of a NGWNI type transmission of the prior art;

fig. 2 is a transmission schematic diagram of the present invention.

In the figure, 11-sun wheel Zf, 12-gear ring Zg, 13-planet wheel Zh, 14-planet wheel Zi, 15-gear ring Zj, 16-planet carrier X;

1-engine base, 2-input shaft, 3-planet carrier, 4-planet shaft, 5-sun gear Za, 6-gear ring Zb, 7-planet gear Zc, 8-planet gear Zd and 9-gear ring Ze.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

Introduction of mechanical design manual, characteristics of NGWNI type: compact structure, small volume, large transmission ratio range, but lower efficiency than NGW type, poor manufacturability, and suitability for medium and small power or short-term work.

Referring to fig. 1 of the drawings, a drawing,

the sun wheel Zf11, the planet carrier X16, the ring gear Zg12 and the ring gear Zj15 are all free to rotate, i.e. the rotational freedom is not limited, and the NGWNI type structure can work as long as any one of the above parts is fixed in the assembling process.

Now, the fixed gear ring Zg12 and the sun gear Zf11 are used as input ends, and the transmission path is as follows:

the gear ring Zg12 is fixed, the input of the sun gear Zf11 is transmitted to the external meshing planetary gear Zh13, then transmitted to the planetary gear Zi14, and finally output through the internal meshing gear ring Zj 15.

From the transmission path, it can be seen that planet gears Zi14 and planet gears ZH13 are respectively arranged at two ends of the planet gear shaft, the planet carrier X is supported in the middle of the planet gear shaft, the planet gear ZH13 is used as input, the planet gear Zi14 is used as output, and the planet shaft has an unbalance load and is not easy to keep balance.

Referring to FIG. 2, (there are 2 planetary carriers 3 in the figure, the other is not indicated)

The embodiment of the utility model provides an output mechanism based on NGWNI type planetary mechanism, including frame 1, input shaft 2, a plurality of planet axle 4 and sun gear Za5, the bearing is passed through at the both ends of input shaft 2 and is installed on frame 1, makes it can the free rotation.

The sun wheel Za5 is installed in the middle of the input shaft 2, the gear ring Zb6 is arranged outside the sun wheel Za5, the planet carrier 3 is installed in the machine base 1 in a floating mode in the assembling process by utilizing the matching relation, the outer circle of the planet carrier 3 is tangent to the planet shaft 4, the planet shafts 4 are all arranged around the outline of the outer circle of the planet carrier 3, the planet carrier 3 can limit the planet shaft 4 after all parts are assembled, the planet wheel Zc7 is guaranteed not to shake while revolving, the planet wheel Zc7 is installed in the middle of the planet shaft 4, seven planet wheels Zc7 are all located between the sun wheel Za5 and the gear ring Zb6, and the seven planet wheels Zc7 are meshed with the sun wheel Za5 and the gear ring Zb6 at the same time;

the planet wheel Zd8 is all installed at planet shaft 4 both ends, and input shaft 2 upper and lower both sides are provided with ring gear Ze9 about sun gear Za5 symmetry, and ring gear Ze9 outer end is provided with the spline, is located the ring gear Ze9 and a plurality of planet wheel Zd8 internal gearing of homonymy.

The sun gear Za5, the ring gear Zb6 and the ring gear Ze9 are all freely rotatable, i.e., their rotational degrees of freedom are not limited, and the entire output mechanism can operate as long as any of the above components is fixed during assembly.

Now, the fixed gear ring Zb6 and the sun gear Za5 are used as input ends, and the transmission path is as follows:

power (such as a motor) is transmitted to an output mechanism through an input shaft 2, the input shaft 2 drives a sun wheel Za5 to rotate and is transmitted to an external meshing planetary wheel Zc7, a planetary wheel Zc7 drives an upper planetary wheel Zd8 and a lower planetary wheel Zd8 through a planetary shaft 4, then the power is transmitted to corresponding inner meshing upper and lower gear rings Ze9, and finally the power is output by splines at the outer ends of the upper and lower gear rings Ze 9.

It can be seen from the transmission path that the two ends of the planet shaft 4 are both provided with planet wheels Zd8, the middle part is provided with planet wheels Zc7, 2 planet carriers 3 are respectively supported between the planet wheels Zd8 and Zc7, the planet wheels Zc7 are used as input, the planet wheels Zd8 at the two ends are used as output, the middle part of the planet shaft 4 is input, the output at the two ends is completely symmetrical, the stress is balanced, and the eccentric load phenomenon does not exist.

The utility model discloses compare with current NGWNI type structure:

because output mechanism need bear overweight load, consider to handle overweight load distribution, select same transmission path to contrast, the utility model discloses a transmission changes the atress ring gear into longitudinal symmetry distribution, output power is provided by longitudinal symmetry's ring gear Ze9 respectively, two sets of planetary gear system equipartition atresss like this, and then adopt same tooth parameter of joining in marriage, do not change under the condition of drive ratio, planet axle atress symmetry, no unbalance loading phenomenon, the transmission is steady, output torque is even, output same moment of torsion has reduced the atress of planet wheel and output ring gear (theoretically reduce 1/2's atress), bearing capacity has been improved greatly, simultaneously theoretically it can also improve the maximum torque of output by one time.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides an output mechanism based on NGWN I type planetary mechanism, includes frame (1), input shaft (2), a plurality of planet axle (4) and sun gear Za (5), its characterized in that: the two ends of the input shaft (2) are rotatably connected with the base (1), a sun wheel Za (5) is arranged in the middle of the input shaft (2), a gear ring Zb (6) is arranged on the outer side of the sun wheel Za (5), a planet carrier (3) is arranged in the base (1) in a floating mode, a plurality of planet shafts (4) are arranged on the planet carrier (3), planet wheels Zc (7) are arranged in the middle of the planet shafts (4), the planet wheels Zc (7) are located between the sun wheel Za (5) and the gear ring Zb (6), and the sun wheel Za (5), the planet wheels Zc (7) and the gear ring Zb (6) are meshed simultaneously;

planet axle (4) both ends all are provided with planet wheel Zd (8), input shaft (2) both ends all are provided with ring gear Ze (9), and ring gear Ze (9) and a plurality of planet wheel Zd (8) that are located the homonymy mesh, sun gear Za (5), ring gear Zb (6) and ring gear Ze (9) are fixed any one of them in the assembly process.

2. An output mechanism based on an NGWN type i planetary mechanism according to claim 1, wherein: the number of the planetary shafts (4) is seven, and the seven planetary shafts (4) are circumferentially distributed along the input shaft (2) in an array manner.

3. An output mechanism based on an NGWN type i planetary mechanism according to claim 1, wherein: the two ring gears Ze (9) are symmetrically distributed about the sun gear Za (5).

4. An output mechanism based on an NGWN type i planetary mechanism according to claim 1, wherein: and the outer end of the gear ring Ze (9) is provided with a spline.

5. An output mechanism based on an NGWN type i planetary mechanism according to claim 1, wherein: and the gear ring Zb (6) is fixedly connected with the engine base (1).