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CN-121977059-A - Planetary converging gearbox and power device

CN121977059ACN 121977059 ACN121977059 ACN 121977059ACN-121977059-A

Abstract

A planetary converging gearbox and a power device relate to the technical field of gearboxes and comprise a main box body, a plurality of planetary gear transmission units, a parallel-stage gear transmission unit and an output shaft. Each planetary gear transmission unit comprises a first-stage planetary transmission mechanism and a second-stage planetary transmission mechanism, the output parts of the first-stage planetary transmission mechanisms are in transmission connection with the output parts of the corresponding second-stage planetary transmission mechanisms, the output parts of all the second-stage planetary transmission mechanisms are in transmission connection with the input parts of the parallel-stage gear transmission units, the output parts of the parallel-stage gear transmission units are in transmission connection with the output shafts, and the parallel-stage gear transmission units and the output shafts are arranged in the main box body. The device can effectively reduce the volume and the weight of the space, can improve the power density and can improve the transmission precision.

Inventors

  • MI ZHONGSHENG
  • Xing Zengfei
  • JI YAO

Assignees

  • 南京高精齿轮集团有限公司

Dates

Publication Date
20260505
Application Date
20260323

Claims (10)

  1. 1. A planetary junction gearbox, comprising: A main case (100), a plurality of planetary gear units (200), a parallel stage gear unit (300), and an output shaft (400); Each planetary gear transmission unit (200) comprises a first-stage planetary transmission mechanism (210) and a second-stage planetary transmission mechanism (220), wherein the output part of the first-stage planetary transmission mechanism (210) is in transmission connection with the output part of the corresponding second-stage planetary transmission mechanism (220), the output parts of all the second-stage planetary transmission mechanisms (220) are in transmission connection with the input parts of the parallel-stage gear transmission units (300), and the output parts of the parallel-stage gear transmission units (300) are in transmission connection with the output shafts (400); the parallel stage gear transmission unit (300) and the output shaft (400) are both mounted to the main housing (100).
  2. 2. The planetary junction gearbox of claim 1, wherein: the first stage planetary transmission (210) includes a plurality of first planetary gears and the second stage planetary transmission (220) includes a plurality of second planetary gears, the number of first planetary gears being less than the number of second planetary gears.
  3. 3. The planetary junction gearbox of claim 2, wherein: the difference between the number of the first planetary gears and the number of the second planetary gears is 1.
  4. 4. The planetary junction gearbox of claim 2, wherein: The first-stage planetary transmission mechanism (210) further comprises a first shell (211), an input shaft (212), a first planet carrier (213), first planet gears (214) and a first gear ring (215), wherein the first shell (211) is fixedly connected with the first gear ring (215), the input shaft (212) and the first planet carrier (213) are rotatably connected with the first shell (211), the first planet gears (214) are rotatably arranged on the first planet carrier (213), the input shaft (212) is meshed with the first planet gears (214), and the first planet gears (214) are meshed with the first gear ring (215).
  5. 5. The planetary junction gearbox of claim 4, wherein: The second-stage planetary transmission mechanism (220) further comprises a second shell (221), a sun gear (222), a second planet carrier (223), a second planet gear (224) and a second gear ring (225), one side of the second shell (221) is fixedly connected with the second gear ring (225), the other side of the second shell (221) is fixedly connected with the first gear ring (215), the second gear ring (225) is fixedly connected with the main box (100), the second planet carrier (223) is rotatably connected with the second shell (221), the second planet gear (224) is rotatably mounted on the second planet carrier (223), one end of the sun gear (222) is fixedly connected with the first planet carrier (213), the other end of the sun gear (222) is meshed with the second planet gear (224), and the second planet gear (224) is meshed with the second gear ring (225).
  6. 6. The planetary junction gearbox of claim 5, wherein: The parallel-stage gear transmission unit (300) comprises gear shafts (310) and transmission gears (320), the number of the gear shafts (310) is equal to that of the second-stage planetary transmission mechanisms (220), the gear shafts (310) are fixedly connected with corresponding second planetary carriers (223) of the second-stage planetary transmission mechanisms (220), the transmission gears (320) are fixedly sleeved outside the output shafts (400), and all the gear shafts (310) are meshed with the transmission gears (320).
  7. 7. The planetary junction gearbox of claim 6, wherein: The number of the transmission gears (320) is a plurality, the transmission gears (320) are arranged at intervals in the axial direction of the output shaft (400), and each gear shaft (310) is meshed with the transmission gears (320) at the same time.
  8. 8. The planetary junction gearbox of claim 6, wherein: the transmission gear (320) is provided with a spline hole, the output shaft (400) is provided with an external spline, the output shaft (400) is arranged in the spline hole in a penetrating mode, and the external spline is matched with the spline hole in a clamping mode.
  9. 9. The planetary junction gearbox of any one of claims 1-8, wherein: All the planetary gear transmission units (200) are positioned on the same side of the main box body (100), and the output end of the output shaft (400) is positioned on the opposite side of the main box body (100).
  10. 10. A power plant, the power plant comprising: a plurality of motors and the planetary confluence gear box as claimed in any one of claims 1-9, wherein the plurality of motors are respectively connected with the input parts of the first-stage planetary transmission mechanism (210) of the plurality of planetary gear transmission units (200) in a one-to-one correspondence manner.

Description

Planetary converging gearbox and power device Technical Field The invention relates to the technical field of gearboxes, in particular to a planetary converging gearbox and a power device. Background At present, in the fields of industrial equipment, engineering machinery, ship propulsion and the like which need high power output, a mode of parallel driving of a plurality of power sources (such as motors and engines) is often adopted to meet power requirements. The conventional multi-power converging device mostly adopts a parallel shaft parallel operation gearbox or a simple gear converging mode. The conventional multi-power converging device mostly adopts the modes of parallel shaft parallel operation, simple gear converging and the like, and has the problems of poor coaxiality, uneven load distribution, long transmission chain, large volume and weight, low transmission efficiency and the like. Disclosure of Invention The invention aims to provide a planetary converging gearbox and a power device, which can effectively reduce the volume and the weight of space, improve the power density and improve the transmission precision. Embodiments of the invention may be implemented as follows: In a first aspect, the present invention provides a planetary junction gearbox comprising: The planetary gear transmission device comprises a main box body, a plurality of planetary gear transmission units, a parallel-stage gear transmission unit and an output shaft; Each planetary gear transmission unit comprises a first-stage planetary transmission mechanism and a second-stage planetary transmission mechanism, wherein the output part of the first-stage planetary transmission mechanism is in transmission connection with the output part of the corresponding second-stage planetary transmission mechanism; the parallel-stage gear transmission unit and the output shaft are both arranged on the main box body. In an alternative embodiment, the first stage planetary transmission includes a plurality of first planetary gears and the second stage planetary transmission includes a plurality of second planetary gears, the number of first planetary gears being less than the number of second planetary gears. Based on the scheme, the number of the first-stage planetary gears is smaller than that of the second-stage planetary gears, so that the first stage is more focused on stable transmission under the working condition of high-speed small torque, and the second stage has more planetary gears to participate in split flow under the working condition of low-speed large torque, so that the bearing capacity and reliability of the second-stage transmission are improved, and the overall load distribution is more uniform. In an alternative embodiment, the difference between the number of first planet gears and the number of second planet gears is 1. Based on the above scheme, for example, 4 planetary gears are adopted in the first stage, and 5 planetary gears are adopted in the second stage. The design achieves good balance between the compactness and the bearing capacity, is an optimized preferable scheme, and can effectively improve the torque density ratio. In an alternative embodiment, the first-stage planetary transmission mechanism further comprises a first shell, an input shaft, a first planet carrier, first planet gears and a first gear ring, wherein the first shell is fixedly connected with the first gear ring, the input shaft and the first planet carrier are rotatably connected with the first shell, the first planet gears are rotatably mounted on the first planet carrier, the input shaft is meshed with the first planet gears, and the first planet gears are meshed with the first gear ring. Based on the scheme, the structure is typical NGW type planetary transmission, the input shaft is a sun gear, the structure is simple, and the transmission efficiency is high. The first shell is fixedly connected with the first gear ring, so that the first-stage planetary mechanism forms an independent module, and the assembly and maintenance are convenient. In an alternative embodiment, the second-stage planetary transmission mechanism further comprises a second shell, a sun gear, a second planet carrier, a second planet gear and a second gear ring, one side of the second shell is fixedly connected with the second gear ring, the other side of the second shell is fixedly connected with the first gear ring, the second gear ring is fixedly connected with the main box, the second planet carrier is rotatably connected with the second shell, the second planet gear is rotatably mounted on the second planet carrier, one end of the sun gear is fixedly connected with the first planet carrier, the other end of the sun gear is meshed with the second planet gear, and the second planet gear is meshed with the second gear ring. Based on the scheme, the first-stage planet carrier is used as output to directly drive the sun gear of the second stage, so that seamless