阅读说明：本技术 一种nw型行星齿轮减速装置及传动系统 (NW type planetary gear speed reducer and transmission system ) 是由 郑建辉 张庚 袁罕 李小龙 孟凡行 于 2020-12-11 设计创作，主要内容包括：本发明公开了一种NW型行星齿轮减速装置及传动系统,属于传动技术领域。所述NW型行星齿轮减速装置包括：二级行星齿轮可转动式地设置在第一行星齿轮支架与第二行星齿轮支架之间,二级行星齿轮由圆锥部及圆柱部组成；锁紧件与二级行星齿轮的圆锥部连接；一级行星齿轮套设于二级行星齿轮的圆锥部,一级行星齿轮设置在锁紧件与二级行星齿轮的圆柱部之间；太阳轮可转动式地设置在第一行星齿轮支架与第二行星齿轮支架之间,太阳轮与一级行星齿轮啮合。本发明NW型行星齿轮减速装置及传动系统降低了制造难度,两行星轮的相对相位角在装配过程中根据实际啮合情况调整,不会因装配精度控制不良影响齿轮啮合受力情况。(The invention discloses an NW type planetary gear speed reducer and a transmission system, and belongs to the technical field of transmission. The NW-type planetary gear reduction device includes: the second-stage planetary gear is rotatably arranged between the first planetary gear bracket and the second planetary gear bracket and consists of a conical part and a cylindrical part; the locking piece is connected with the conical part of the secondary planet gear; the primary planet gear is sleeved on the conical part of the secondary planet gear, and the primary planet gear is arranged between the locking piece and the cylindrical part of the secondary planet gear; the sun gear is rotatably disposed between the first and second planet gear carriers, and the sun gear is meshed with the primary planet gears. The NW type planetary gear speed reducer and the transmission system reduce the manufacturing difficulty, the relative phase angle of the two planetary gears is adjusted according to the actual meshing condition in the assembling process, and the gear meshing stress condition cannot be influenced due to the bad control of the assembling precision.)

1. An NW-type planetary gear reduction device, comprising: the planetary gear mechanism comprises a first planetary gear bracket, a second planetary gear bracket, a primary planetary gear, a secondary planetary gear, a sun gear and a locking member;

the secondary planet gear is rotatably arranged between the first planet gear bracket and the second planet gear bracket and consists of a conical part and a cylindrical part;

the locking piece is connected with the conical part of the secondary planetary gear;

the primary planet gear is sleeved on the conical part of the secondary planet gear, and the primary planet gear is arranged between the locking piece and the cylindrical part of the secondary planet gear;

the sun gear is rotatably disposed between the first and second planet gear carriers, the sun gear being in mesh with the primary planet gears.

2. The NW-type planetary gear reduction device according to claim 1, characterized in that:

the diameter of the end part of the conical part of the secondary planetary gear, which faces the cylindrical part of the secondary planetary gear, is larger than the diameter of the end part of the conical part of the secondary planetary gear, which faces away from the cylindrical part of the secondary planetary gear.

3. The NW-type planetary gear reduction device according to claim 1, characterized in that the NW-type planetary gear reduction device further comprises: a pin shaft;

the first end of the pin shaft is arranged in the first planetary gear bracket in an interference fit mode, and the second end of the rotating shaft is arranged in the second planetary gear bracket in an interference fit mode;

the second-stage planetary gear is rotatably arranged on the pin shaft.

4. The NW-type planetary gear reduction device according to claim 3, characterized in that:

and a bearing is arranged between the pin shaft and the secondary planetary gear.

5. The NW-type planetary gear reduction device according to claim 1, characterized in that:

a first gasket is arranged between the secondary planet gear and the first planet gear bracket.

6. The NW-type planetary gear reduction device according to claim 1, characterized in that:

and a second gasket is arranged between the secondary planetary gear and the second planetary gear bracket.

7. The NW-type planetary gear reduction device according to claim 1, characterized in that the NW-type planetary gear reduction device further comprises: a drive shaft;

the transmission shaft penetrates through the first planetary gear bracket and is fixedly connected with the sun gear.

8. The NW-type planetary gear reduction device according to claim 1, characterized in that the NW-type planetary gear reduction device further comprises: a ring gear;

the ring gear is engaged with the cylindrical portion of the secondary planetary gear.

9. The NW-type planetary gear reduction device according to claim 1, characterized in that:

the locking piece is arranged in the counter bore of the primary planetary gear.

10. A transmission system comprising an NW-type planetary reduction gear according to any of claims 1-9.

Technical Field

The invention relates to the technical field of transmission, in particular to an NW type planetary gear speed reducer and a transmission system.

Background

The planetary gear transmission has the advantages of light weight, small size, high efficiency, large power and rotating speed range and the like, and is widely applied to various transmission systems, and a planetary reduction mechanism with a speed ratio of 7-21 generally adopts a scheme of connecting an NW type planetary reduction mechanism or two-stage NGW type planetary reduction mechanisms in series, wherein the NW type planetary reduction mechanism has relatively small volume and weight and is more advantageous, but the scheme of connecting the two-stage NGW type planetary reduction mechanisms in series is used more at present, and the NW type planetary reduction mechanism is used less.

The NW type planetary reduction mechanism is less used because the design, processing, manufacturing and installation of the planetary gear have certain limitations: the planetary gear of the NW type planetary reduction mechanism generally adopts a split type planetary gear, however, in the prior art, the two planetary gears are generally connected by adopting interference fit or key connection, the relative phase angle of the big gear and the small gear is fixed after assembly, adjustment cannot be carried out, if the assembly precision is poor, the gear meshing stress condition is worsened, and the service life of the reduction mechanism is influenced.

Disclosure of Invention

The invention provides a NW type planetary gear speed reducing device and a transmission system, which solve or partially solve the technical problem that the relative phase angle of a large gear and a small gear is fixed and cannot be adjusted after an NW type planetary speed reducing mechanism is assembled in the prior art.

To solve the above-described technical problem, the present invention provides an NW type planetary gear reduction device comprising: the planetary gear mechanism comprises a first planetary gear bracket, a second planetary gear bracket, a primary planetary gear, a secondary planetary gear, a sun gear and a locking member; the secondary planet gear is rotatably arranged between the first planet gear bracket and the second planet gear bracket and consists of a conical part and a cylindrical part; the locking piece is connected with the conical part of the secondary planetary gear; the primary planet gear is sleeved on the conical part of the secondary planet gear, and the primary planet gear is arranged between the locking piece and the cylindrical part of the secondary planet gear; the sun gear is rotatably disposed between the first and second planet gear carriers, the sun gear being in mesh with the primary planet gears.

Further, the diameter of the end of the conical portion of the secondary planet gear facing the cylindrical portion of the secondary planet gear is larger than the diameter of the end of the conical portion of the secondary planet gear facing away from the cylindrical portion of the secondary planet gear.

Further, the NW-type planetary gear reduction device further includes: a pin shaft; the first end of the pin shaft is arranged in the first planetary gear bracket in an interference fit mode, and the second end of the rotating shaft is arranged in the second planetary gear bracket in an interference fit mode;

the second-stage planetary gear is rotatably arranged on the pin shaft.

Further, a bearing is arranged between the pin shaft and the secondary planetary gear.

Further, a first spacer is disposed between the secondary planet gear and the first planet gear carrier.

Further, a second gasket is arranged between the secondary planet gear and the second planet gear carrier.

Further, the NW-type planetary gear reduction device further includes: a drive shaft; the transmission shaft penetrates through the first planetary gear bracket and is fixedly connected with the sun gear.

Further, the NW-type planetary gear reduction device further includes: a ring gear; the ring gear is engaged with the cylindrical portion of the secondary planetary gear.

Further, the locking member is arranged in a counter bore of the primary planetary gear.

The present application also provides a transmission system comprising said NW-type planetary reduction.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the second planet gear is rotatablely arranged between the first planet gear bracket and the second planet gear bracket, the second planet gear consists of a conical part and a cylindrical part, so the first planet gear bracket and the second planet gear bracket support the second planet gear, the sun gear is rotatablely arranged between the first planet gear bracket and the second planet gear bracket, and the sun gear is meshed with the first planet gear, so the sun gear can transmit power to the first planet gear, the locking piece is connected with the conical part of the second planet gear, the conical part of the second planet gear is sleeved with the first planet gear, and the first planet gear is arranged between the locking piece and the cylindrical part of the second planet gear, so the relative phase angle between the first planet gear and the second planet gear can realize stepless adjustment before the connection and fixation, and the cone surface is fixed by the locking piece after the adjustment is in place, the locking piece is adopted for pressing, the conical surface static friction connection is kept to be relatively static, the relative phase angle of the primary planetary gear and the secondary planetary gear is adjusted according to the actual meshing condition in the assembling process, the gear meshing stress condition cannot be influenced due to poor assembling precision control, stepless adjustment of the phase angle between the primary planetary gear and the secondary planetary gear is realized, the gear can be randomly assembled to meet the assembling condition, any speed ratio can be realized in a certain speed ratio range, the gear assembling calculation process is simplified, the primary planetary gear and the secondary planetary gear are manufactured in a split mode, the manufacturing difficulty of the duplex planetary gear is reduced, even the axial size of the gear is small, and gear grinding can be carried out when the primary planetary gear and the secondary planetary gear are machined.

Drawings

Fig. 1 is a schematic structural view of an NW planetary gear reduction device according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1, an NW-type planetary gear reduction apparatus provided by an embodiment of the present invention includes: a first planet gear carrier 1, a second planet gear carrier 2, a primary planet gear 3, a secondary planet gear 4, a sun gear 5 and a locking member 6.

The secondary planet gear 4 is rotatably disposed between the first planet gear carrier 1 and the second planet gear carrier 2, and the secondary planet gear 4 is composed of a conical portion and a cylindrical portion.

The locking member 6 is connected with the conical portion of the secondary planetary gear 4.

The primary planet gear 3 is sleeved on the conical part of the secondary planet gear 4, and the primary planet gear 3 is arranged between the locking member 6 and the cylindrical part of the secondary planet gear 4.

The sun gear 5 is rotatably disposed between the first planetary gear carrier 1 and the second planetary gear carrier 2, and the sun gear 5 is meshed with the primary planetary gears 3.

In the present embodiment, since the secondary planet gears 4 are rotatably disposed between the first planet carrier 1 and the second planet carrier 2 and the secondary planet gears 4 are composed of the conical portion and the cylindrical portion, the first planet carrier 1 and the second planet carrier 2 support the secondary planet gears 4, since the sun gear 5 is rotatably disposed between the first planet carrier 1 and the second planet carrier 2 and the sun gear 5 is engaged with the primary planet gears 3, the sun gear 5 can transmit power to the primary planet gears 3, since the locker 6 is coupled to the conical portion of the secondary planet gears 4, the primary planet gears 3 are fitted over the conical portion of the secondary planet gears 4, and the primary planet gears 3 are disposed between the locker 6 and the cylindrical portion of the secondary planet gears 4, the relative phase angle between the primary planet gears 3 and the secondary planet gears 4 can be steplessly adjusted before the connection is fixed, after the adjustment is in place, the conical surface is pressed through the locking part 6 to be fixed, the conical surface is pressed through the locking part 6 and is kept relatively static through static friction connection, the relative phase angle of the primary planetary gear 3 and the secondary planetary gear 4 is adjusted according to the actual meshing condition in the assembling process, the gear meshing stress condition cannot be influenced due to poor assembling precision control, stepless adjustment of the phase angle between the primary planetary gear 3 and the secondary planetary gear 4 is achieved, the gear can be randomly arranged to meet the assembling condition, any speed ratio can be achieved within a certain speed ratio range, the gear arrangement calculation process is simplified, the primary planetary gear 3 and the secondary planetary gear 4 are manufactured in a split mode, the manufacturing difficulty of the duplex planetary gear is reduced, and even if the axial size of the gear is small, gear grinding can be carried out during the processing of the primary planetary gear and.

Specifically, the diameter of the end of the conical portion of the secondary planetary gear 4 facing the cylindrical portion of the secondary planetary gear 4 is larger than the diameter of the end of the conical portion of the secondary planetary gear 4 facing away from the cylindrical portion of the secondary planetary gear 4, facilitating the locking member 6 to lock the primary planetary gear 3.

Specifically, the NW-type planetary gear reduction device further includes: and a pin 7.

A first end of the pin 7 is disposed in the first planetary gear carrier 1 by interference fit, and a second end of the pin 7 is disposed in the second planetary gear carrier 2 by interference fit.

The secondary planet gear 4 is rotatably arranged on the pin 7.

A bearing 8 is arranged between the pin shaft 7 and the secondary planet gear 4.

When the primary planetary gear 3 transmits power to the secondary planetary gear 4, the secondary planetary gear 4 rotates on the pin 7 through the bearing 8.

Specifically, a first gasket 9 is arranged between the second-stage planetary gear 4 and the first planetary gear carrier 1, and an oil passage is arranged on the first gasket 9, so that the bearing 8 can be well lubricated.

Wherein, first through-hole has been seted up on first gasket 9, and round pin axle 7 passes first through-hole.

A second gasket 10 is arranged between the secondary planet gear 4 and the second planet gear carrier 2, and an oil duct is arranged on the second gasket 10, so that the bearing 8 can be well lubricated.

Wherein, the second gasket 10 is provided with a first through hole, and the pin 7 passes through the first through hole.

Specifically, the NW-type planetary gear reduction device further includes: a drive shaft 11.

The transmission shaft 11 passes through the first planet gear carrier 1 and is fixedly connected with the sun gear 5. In the present embodiment, the transmission shaft 11 passing through the first planet gear carrier 1 can be fixedly connected with the sun gear 5 by welding, so as to ensure the connection is firm. The propeller shaft 11 transmits power to the sun gear 5.

Specifically, the NW-type planetary gear reduction device further includes: a ring gear 12.

The gear ring 12 is engaged with the cylindrical portion of the secondary planet gear 4, the gear ring 12 is a fixed member, and the secondary planet gear 4 drives the first planet gear carrier 1 and the second planet gear carrier 2 to move.

Specifically, the locking member 6 is disposed in a counter bore of the primary planetary gear 3, and does not occupy axial space.

The locking member 6 may be a locking nut.

The invention further provides a transmission system, the transmission system adopts the NW type planetary gear speed reducer, the specific structure of the NW type planetary gear speed reducer refers to the above embodiments, and since the NW type planetary gear speed reducer adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and details are not repeated herein.

In order to more clearly describe the embodiments of the present invention, the following description is made in terms of the method of using the embodiments of the present invention.

The relative phase angle between the primary planet gear 3 and the secondary planet gear 4 can be adjusted before the connection is fixed in a preassembly way.

The gear ring 12, the primary planet gear 3, the secondary planet gear 4 and the sun gear 5 are pre-assembled and adjusted, the gear ring 12 is fixed, after the locking piece 6 with set torque is used, the primary planet gear 3 and the secondary planet gear 4 can still relatively rotate under the action of certain torque, the sun gear 5 is rotated under the action of certain torque, the gear surfaces between the sun gear 5 and the primary planet gear 3 and between the secondary planet gear 4 and the gear ring 12 are uniformly stressed and contacted in one direction, the rotating torque of the sun gear 5 is reduced to a certain value, so that the primary planet gear 3 and the secondary planet gear 4 do not relatively rotate but are still stressed, at the moment, the locking piece 6 is screwed down by finally set torque, the locking piece 6 is tightly pressed on the conical surface of the secondary planet gear 4 for fixing, the conical angle of the conical surface is determined according to the transmitted torque and the pressing force of the locking piece 6, and the relative sliding between the primary planet gear 3 and the secondary planet gear 4 is .

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.