CN-121973618-A - Speed reduction hub electric wheel system with lightweight cooling and supporting structure

Abstract

The invention relates to a speed reduction hub electric wheel system with a light cooling and supporting structure, which comprises hub electric wheel bodies arranged at two ends of an axle, wherein the hub electric wheel bodies are assembled and fixed on a frame body, a light oil cooling unit is arranged on the frame body and is integrally arranged on a battery pack shell, an EPB actuator is also integrally arranged on the battery pack shell, the light oil cooling unit is communicated with the inside of the hub electric wheel body through a long pipeline, the light oil cooling unit comprises an oil cooler, an oil pump and a filter, a motor, a speed reducer, a rotor supporting bearing, a hub bearing and a brake are integrally arranged on the hub electric wheel body, and the motor, the speed reducer and the rotor supporting bearing adopt an integrated oil cooling design. Compared with the prior art, the invention can optimize the internal space and the cooling system of the electric wheel, reduce unsprung mass and improve the integral reliability of the electric wheel.

Inventors

• ZHANG LIJUN
• SHEN HAOMING
• MENG DEJIAN
• LI BIRUI

Assignees

• 同济大学

Dates

Publication Date

20260505

Application Date

20260129

Claims (10)

1. 1. The utility model provides a speed reduction wheel hub electronic round system with lightweight cooling and bearing structure, its characterized in that, including setting up in the wheel hub electronic round body (1) at axle both ends, wheel hub electronic round body (1) assembly is fixed in the frame body, be provided with the cold unit of lightweight oil on the frame body, the cold unit of lightweight oil is integrated to be installed on battery package casing (5), the cold unit of lightweight oil is linked together with wheel hub electronic round body (1) inside, integrated motor (101), reduction gear (102), rotor support bearing (103), wheel hub bearing (104) and stopper (105) of installing on wheel hub electronic round body (1), motor (101), reduction gear (102) and rotor support bearing (103) adopt the cold design of integration oil.
2. 2. The speed reduction hub electric wheel system with the light-weight cooling and supporting structure according to claim 1, wherein the light-weight oil cooling unit comprises an oil cooler (2), a filter (3) and an oil pump (4), the oil cooler (2), the filter (3), the oil pump (4) and the hub electric wheel body (1) are connected through pipelines, cooling liquid is circulated in the pipelines, the pipelines are arranged along a frame, and the pipelines connected with the hub electric wheel body (1) adopt hoses to adapt to tire jumping.
3. 3. A speed reducing hub electric wheel system with a lightweight cooling and supporting structure according to claim 2, characterized in that the oil cooler (2), the filter (3), the oil pump (4) and the hub electric wheel body (1) are provided with an oil inlet and an oil outlet, the cooling liquid flows out from the oil outlet of the hub electric wheel body (1) and flows into the filter (3) from the oil inlet of the filter (3) through a pipeline; The cooling liquid flows out from an oil outlet of the filter (3) and flows in from an oil inlet of the oil pump (4) through a pipeline; The cooling liquid flows out from an oil outlet of the oil pump (4) and flows in from an oil inlet of the oil cooler (2) through a pipeline; the cooling liquid flows out from the oil outlet of the oil cooler (2), flows in from the oil inlet of the hub electric wheel body (1) of the front axle and the rear axle through the pipe, cools the inside of the hub electric wheel body (1), and then flows out from the oil outlet for the next cooling circulation.
4. 4. A reduction hub electric wheel system with a lightweight cooling and supporting structure according to claim 1, characterized in that the hub electric wheel body (1) is internally provided with three mutually communicating subchambers for the corresponding installation of the motor (101), the reducer (102) and the rotor support bearing (103).
5. 5. A reduction hub electric wheel system with lightweight cooling and support structure according to claim 4, characterized in that the hub electric wheel body (1) comprises a housing unit for dividing the interior of the hub electric wheel body (1) into three subchambers, the housing unit comprises an electric wheel housing, an electric wheel end cap, a bearing end cap and a hub bearing housing, the electric wheel housing is internally machined with oil channels and nozzles, and the electric wheel end cap is internally machined with oil grooves and oil channels.
6. 6. The speed reduction hub electric wheel system with lightweight cooling and supporting structure of claim 5, wherein the hub bearing (104) is a tapered roller third generation hub bearing, an outer ring of the hub bearing (104) and a hub bearing seat are integrally designed, and a half of an inner ring of the hub bearing (104) and a wheel axle are integrally designed.
7. 7. A reduction hub electric wheel system with lightweight cooling and support structure as claimed in claim 6, wherein rollers are mounted between the outer and inner rings of the hub bearing (104), and sealing rings, gaskets and retainers are mounted at the ends of the hub bearing (104).
8. 8. The speed reduction hub electric wheel system with lightweight cooling and supporting structure according to claim 5, characterized in that the speed reducer (102) is a planetary gear reducer (102) composed of a sun gear, a planet carrier and a gear ring, the gear ring is fixedly connected with the housing unit, and the planetary gear reducer (102) is integrally nested and arranged inside the motor (101).
9. 9. A decelerator hub motorized wheel system with lightweight cooling and support structure as claimed in claim 1, wherein the brake (105) is a drum brake with a brake sole plate integrally mounted to the hub motorized wheel body (1).
10. 10. The speed reduction hub electric wheel system with the light-weight cooling and supporting structure according to claim 9, wherein the EPB actuator (6) is integrally installed on the battery pack shell (5), and the EPB actuator (6) extends into the brake bottom plate along the hub electric wheel body (1) through the long parking stay wire to be connected with the brake parking rocker arm.

Description

Speed reduction hub electric wheel system with lightweight cooling and supporting structure Technical Field The invention relates to the technical field of hub electric drive assemblies, in particular to a speed reduction hub electric wheel system with a lightweight cooling and supporting structure. Background Compared with the traditional fuel automobile, the electric automobile can realize energy conservation and emission reduction by replacing fuel with electric energy, and can be divided into centralized driving and distributed driving according to a driving mode, wherein parts such as a transmission shaft, a transfer case and a differential mechanism of the centralized driving occupy most of space of a longitudinal beam of the automobile, the total arrangement and the light weight of the automobile are affected, the overall efficiency of a multi-link transmission chain is low, and the distributed driving has the advantages of short transmission chain, low loss, high efficiency, independent control of each wheel, good road adaptability and the like, and is a hot spot for the design development and the driving control research of the current electric automobile. For the distributed driving vehicle, the hub electric wheel driven by the hub motor is mainly adopted, the chassis structure can be greatly simplified, other parts except for the driving system are conveniently and flexibly arranged, the scheme of driving the hub electric wheel by direct driving and decelerating is included, compared with the scheme of driving the hub electric wheel by decelerating, the direct driving hub electric wheel has higher efficiency and simpler structure, faster acceleration and better driving experience can be provided, however, the disadvantage of the direct driving hub electric wheel is that higher motor power and more complex control system are needed, and higher manufacturing and maintenance cost is required. Currently, the application of direct-drive hub electric wheels is mainly focused on the fields of high-performance electric automobiles and racing automobiles. The electric wheel of the speed reduction hub refers to a driving mode of integrating a motor and a speed reducer in the wheel, and the technology has been widely applied to the fields of electric bicycles, electric motorcycles and the like. However, the design difficulty of the electric wheel with the speed reduction wheel hub is high, the arrangement mode of the motor and the speed reduction mechanism in the electric wheel is improper, the arrangement of the main bearing positions of the wheel is unreasonable, the wheel hub motor occupies excessive space outside the wheel, the problems that steering main pins, a suspension and a braking system are arranged in space, the bearing of parts such as a motor shell and the like are unreasonable are solved, the reliability and the safety of the electric wheel are affected if the arrangement of the braking system is unreasonable, the performance of the motor is affected by heat generated by the braking system, and in addition, the electric wheel with the wheel hub has over-high unsprung mass and poor smoothness of the whole vehicle are also faced. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a speed reduction hub electric wheel system with a lightweight cooling and supporting structure, which can optimize the internal space and cooling system of the electric wheel, reduce unsprung mass and improve the overall reliability of the electric wheel. The speed reduction hub electric wheel system with the light-weight cooling and supporting structure comprises hub electric wheel bodies arranged at two ends of an axle, wherein the hub electric wheel bodies are assembled and fixed on a frame body, a light-weight oil cooling unit is arranged on the frame body and is integrally installed on a battery pack shell, the light-weight oil cooling unit is communicated with the inside of the hub electric wheel body, a motor, a speed reducer, a rotor supporting bearing, a hub bearing and a brake are integrally installed on the hub electric wheel body, and the motor, the speed reducer and the rotor supporting bearing adopt an integrated oil cooling design. Further, lightweight oil cooling unit includes oil cooler, filter and oil pump, pass through the pipe connection between oil cooler, filter, oil pump and the wheel hub electric wheel body, it has the coolant liquid to circulate in the pipeline, the pipeline is arranged along the frame, wheel hub electric wheel body connects's pipeline adopts the hose to adapt to the tire and beat. Further, the oil cooler, the filter, the oil pump and the hub electric wheel body are all provided with an oil inlet and an oil outlet, and the cooling liquid flows out of the oil outlet of the hub electric wheel body and flows into the filter from the oil inlet of the filter through a pipeline; The cooling liquid flows out from an oil outlet of the filt