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Electric drive axle of double-stage planetary gear reducer

A technology of gear reducer and planetary gear, which is applied in the direction of belt/chain/gear, transmission parts, mechanical equipment, etc., can solve the problems of difficult load distribution, system vibration and noise, and tight space layout, etc., to achieve optimized rear axle layout Effects of space, cost reduction, and structure simplification

Pending Publication Date: 2020-04-21
LIUZHOU WULING MOTORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional electric drive rear axle is limited by its own structure, and there are generally problems of tight space layout and heavy weight
In addition, affected by factors such as gear machining accuracy, manufacturing errors, and installation errors, it is difficult to distribute the load evenly during operation, which in turn leads to vibration and noise in the system

Method used

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  • Electric drive axle of double-stage planetary gear reducer
  • Electric drive axle of double-stage planetary gear reducer
  • Electric drive axle of double-stage planetary gear reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] See Figure 4 , the two ends of the planetary pin shaft 40 (41) are respectively inserted into the mounting holes of the planetary gear 20 (21) and the planetary carrier 30 (31), forming the basic connection relationship of the planetary gear 20, and respectively constructing the planetary gear train to meet the transmission requirements. Corresponding radial positioning of the relationship.

[0053] In order to more clearly describe the composition and mechanism of the load-sharing structure, here, the inner section of the installation hole of the planetary wheel 20 that is opposite to the planet carrier 30 is defined as the first hole section 601, and the installation hole of the planet carrier 30 is opposite to the planetary wheel 20. The inner section of is the second hole section 801. The orientation words such as "inner" and "outer" used in this article are defined on the basis of the matching relationship between the matched planetary gear 20 and the planetary c...

Embodiment 2

[0066] This solution is consistent with the main design concept of the load sharing structure provided in Embodiment 1, the only difference is that the planetary pin shaft 40 is a stepped shaft, and the small diameter section 401 of the stepped shaft and the first hole section of the mounting hole on the side of the planetary wheel 20 601 forms a preset radial gap δ, and the diameter of the large-diameter section 402 of the stepped shaft is the same as the radial dimension of the mounting hole of the adapter section. See Figure 8 , this figure is a schematic diagram of the load sharing structure described in this embodiment. In order to clearly show the differences and connections between this solution and the foregoing embodiments, the same functional components and structures are shown with the same symbols in the figure.

[0067] As shown in the figure, the planetary gear 20 on the planetary gear train forms a cantilever beam-like structure from the center points correspon...

Embodiment 3

[0069] This solution is consistent with the main design concept of the load sharing structure provided in Embodiments 1 and 2, the only difference is that the diameter of the first hole section 601 is larger than the diameter of the outer section 603 of the mounting hole, and the planetary pin shaft 40 is a stepped shaft, A preset radial gap δ is formed between the small-diameter section 401 of the stepped shaft and the first hole section 601 of the mounting hole on the side of the planetary wheel 20, and the diameter of the large-diameter section 402 of the stepped shaft is the same as the diameter of the outer section 603 of the mounting hole of the adapter section. to the same size. See Figure 9 , this figure is a schematic diagram of the load sharing structure described in this embodiment. In order to clearly show the differences and connections between this solution and the foregoing embodiments, the same functional components and structures are shown with the same symbo...

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Abstract

The invention discloses an electric drive axle of a double-stage planetary gear reducer. The electric drive axle comprises a motor, the planetary gear reducer, a differential and axle housings. The motor outputs power to the differential through the planetary gear reducer, and the axle housings are arranged outside semi-shafts on the two sides of the differential in a covering manner. Axial through holes are formed in an output shaft of the motor and a center component of the planetary gear reducer correspondingly, and the output shaft of the motor, the center of the planetary gear reducer andthe two semi-shafts are coaxially arranged. The first semi-shaft of the differential stretches out axially, and the second semi-shaft of the differential sequentially penetrates through the axial through holes of the planetary gear reducer and the output shaft of the motor axially to stretch out. By means of the scheme, through structural improvement, the occupied space is optimized, and the weight of a transmission system can be reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, in particular to an electric drive axle with a double-stage planetary gear reducer. Background technique [0002] At present, in the field of mechanical transmission, planetary gear transmission is widely used in various fields such as aviation, ships, and automobiles due to its high load capacity and large transmission speed ratio. Among them, pure electric vehicles in the automotive industry have become the main research direction in recent years. For pure electric vehicles, since there is no gearbox, there is a higher transmission speed ratio requirement for the reducer. Single-stage planetary gear reduction Sometimes the reducer can no longer meet the transmission requirements. Therefore, the double-stage planetary gear reducer came into being and is gradually widely used. [0003] However, the traditional electric drive rear axle is limited by its own structure, and there ar...

Claims

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Application Information

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IPC IPC(8): F16H57/023F16H57/028F16H57/031F16H57/037F16H57/08
CPCF16H57/023F16H57/028F16H57/031F16H57/037F16H57/08F16H2057/02043F16H2057/02034F16H2057/02086F16H2057/02091
Inventor 梁志陆登龙袁禄庆焦传梅彭南江徐海军
Owner LIUZHOU WULING MOTORS
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