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CN-224229214-U - Unidirectional transmission planet carrier for hub motor

CN224229214UCN 224229214 UCN224229214 UCN 224229214UCN-224229214-U

Abstract

The utility model belongs to the technical field of hub motors and discloses a unidirectional transmission planet carrier for a hub motor, which comprises a planet carrier inner ring fixedly arranged, wherein a planet carrier outer ring coaxially arranged is arranged on the outer side of the planet carrier inner ring, a plurality of shaft posts are connected to the upper end of the planet carrier outer ring and are coaxially arranged with the planet carrier outer ring, the shaft posts are uniformly distributed annularly around the central axis of the planet carrier outer ring and are used for installing planet gears, an annular roller path is formed between the outer side wall of the planet carrier inner ring and the inner side wall of the planet carrier outer ring, a plurality of cylindrical rollers are arranged in the roller path and are coaxially arranged with the planet carrier inner ring, the radial width of the roller path along the planet carrier inner ring is equal to the diameter of the cylindrical rollers, a plurality of special-shaped rollers are arranged in the roller path, and the special-shaped rollers and the cylindrical rollers are coaxially arranged.

Inventors

  • BAI YANG
  • WEI CHAO
  • WANG LETIAN
  • CHEN CHENG
  • LIU LIN

Assignees

  • 南京夸克电动科技有限责任公司

Dates

Publication Date
20260512
Application Date
20250716

Claims (8)

  1. 1. The utility model provides a wheel hub motor is with one-way transmission planet carrier, includes fixed planet carrier inner ring (100) that sets up, its characterized in that: The planet carrier comprises a planet carrier inner ring (100), a planet carrier outer ring (200) coaxially arranged outside the planet carrier inner ring (100), a plurality of shaft posts (800) are connected to the upper end of the planet carrier outer ring (200), the shaft posts (800) and the planet carrier outer ring (200) are coaxially arranged, the plurality of shaft posts (800) are uniformly distributed in a ring shape around the central axis of the planet carrier outer ring (200), and the shaft posts (800) are used for installing planet gears; An annular rollaway nest (300) is formed between the outer side wall of the planet carrier inner ring (100) and the inner side wall of the planet carrier outer ring (200); A plurality of cylindrical rollers (400) are arranged in the roller path (300), the cylindrical rollers (400) and the planet carrier inner ring (100) are coaxially arranged, and the radial width of the roller path (300) along the planet carrier inner ring (100) is equal to the diameter of the cylindrical rollers (400); A plurality of special-shaped rollers (500) are arranged in the rollaway nest (300), the special-shaped rollers (500) and the cylindrical rollers (400) are coaxially arranged, the outer side wall of the planet carrier inner ring (100) and the inner side wall of the planet carrier outer ring (200) are always in contact with the special-shaped rollers (500), and the contact postures of the special-shaped rollers (500) relative to the planet carrier inner ring (100) and the planet carrier outer ring (200) are the same; The special-shaped roller (500) is a regular-cross-section cylinder along the axial direction, and the maximum cross-section width in the cross section along the axial direction is larger than the diameter of the cylindrical roller (400); when the special-shaped roller (500) deflects, the width of the special-shaped roller (500) along the radial direction of the planet carrier outer ring (200) gradually increases or decreases.
  2. 2. The unidirectional transmission planet carrier for the hub motor of claim 1, wherein the planet carrier outer ring (200) is provided with end plates (600) at both ends in the axial direction thereof, the end plates are used for covering the raceways (300), and the two end plates (600) and the planet carrier outer ring (200) are fixedly connected into a whole through a plurality of connecting pieces (700).
  3. 3. The unidirectional transmission planet carrier for an in-wheel motor as claimed in claim 2, wherein the plurality of cylindrical rollers (400) are provided in plural, and the plurality of cylindrical rollers (400) are uniformly distributed in a ring shape around the center axis of the inner ring (100) of the planet carrier.
  4. 4. A unidirectional transmission planet carrier for an in-wheel motor as claimed in claim 3, characterized in that the number of profiled rollers (500) between any two adjacent cylindrical rollers (400) is equal, and the profiled rollers (500) between two adjacent cylindrical rollers (400) are equally spaced.
  5. 5. A unidirectional transmission planet carrier for an in-wheel motor as claimed in claim 1, characterized in that the cross section of the profiled roller (500) in the axial direction is in the shape of a parallelogram.
  6. 6. The unidirectional transmission planet carrier for an in-wheel motor as claimed in claim 5, wherein the four corners of the parallelogram cross section of the profiled roller (500) are provided with arc chamfers.
  7. 7. The unidirectional transmission carrier for an in-wheel motor as claimed in claim 1, characterized in that the cross section of the profiled roller (500) in the axial direction is cam end face-shaped.
  8. 8. The unidirectional transmission planet carrier for the hub motor as claimed in claim 1, wherein the end plates (600) are provided with circular through holes (601) which are coaxially arranged with the planet carrier inner ring (100), the diameter of the circular through holes (601) is smaller than the diameter of the outer peripheral wall of the planet carrier inner ring (100), and the diameter of the circular through holes (601) is larger than or equal to the diameter of the inner peripheral wall of the planet carrier inner ring (100).

Description

Unidirectional transmission planet carrier for hub motor Technical Field The utility model belongs to the technical field of hub motors, and particularly relates to a unidirectional transmission planet carrier for a hub motor. Background In the design of a unidirectional transmission planet carrier for an in-wheel motor, the traditional cylindrical roller type structure has obvious technical limitations. Such one-way clutches implement a locking function based on the principle of a wedge fit of the rollers and the ramp race, the inherent structure of which results in the inevitable running clearance in the free-spinning state. Specifically, in order to realize unidirectional locking, the rollers need to be tightly matched with the inner ring and the outer ring in a locking state, and the contact pressure needs to be completely released in a releasing state, so that the inner ring and the outer ring of the planet carrier lose mechanical connection when freely rotating due to the working principle. At the same time, a clearance gap of 0.1-0.3mm must be reserved between the roller and the raceway in view of manufacturing tolerances and assembly requirements, further exacerbating the radial play problem. When the hub motor runs at a high speed, the structural defect can cause relative runout of the inner ring and the outer ring of the planet carrier, so that not only obvious vibration noise is caused, but also the contact surface is quickly worn due to impact load, and more seriously, the separation phenomenon of the inner ring and the outer ring of the planet carrier in the traditional design directly affects the stability of power transmission, and the integral performance of the hub motor is seriously restricted, so that the problems of unstable rotation and large vibration noise of the unidirectional transmission planet carrier caused by the separation of the inner ring and the outer ring exist in the prior art. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide a unidirectional transmission planet carrier for a hub motor, which solves the problems of unstable rotation and large vibration noise caused by separation of inner and outer rings of the unidirectional transmission planet carrier in the prior art. The aim of the utility model can be achieved by the following technical scheme: a unidirectional transmission planet carrier for an in-wheel motor comprises a planet carrier inner ring which is fixedly arranged; The outer side of the inner ring of the planet carrier is provided with an outer ring of the planet carrier which is coaxially arranged, the upper end of the outer ring of the planet carrier is connected with a plurality of shaft posts which are coaxially arranged with the outer ring of the planet carrier, the shaft posts are uniformly distributed in a ring shape around the central axis of the outer ring of the planet carrier, and the shaft posts are used for installing planet gears; an annular rollaway nest is formed between the outer side wall of the inner ring of the planet carrier and the inner side wall of the outer ring of the planet carrier; The raceway is internally provided with a plurality of cylindrical rollers which are coaxially arranged with the inner ring of the planet carrier, and the radial width of the raceway along the inner ring of the planet carrier is equal to the diameter of the cylindrical rollers; The raceway is internally provided with a plurality of special-shaped rollers, the special-shaped rollers and the cylindrical rollers are coaxially arranged, the outer side wall of the inner ring of the planet carrier and the inner side wall of the outer ring of the planet carrier are always in contact with the special-shaped rollers, and the contact postures of the special-shaped rollers relative to the inner ring of the planet carrier and the outer ring of the planet carrier are the same; The special-shaped roller is a cylinder with an equal cross section along the axial direction, and the maximum cross section width in the cross section along the axial direction is larger than the diameter of the cylindrical roller; When the special-shaped rollers deflect, the width of the special-shaped rollers along the radial direction of the outer ring of the planet carrier is gradually increased or reduced. The planet carrier outer ring is equipped with the end plate along the both ends of self axis direction, and the end plate all is used for covering the raceway, and through a plurality of connecting pieces fixed connection as an organic wholely between both ends board and the planet carrier outer ring. The cylindrical rollers are a plurality of, and the cylindrical rollers are evenly distributed in a ring shape around the central axis of the inner ring of the planet carrier. The number of the special-shaped rollers between any two adjacent cylindrical rollers is equal, and the special-shaped rollers between the two adjacent cylindrical