US-20260128641-A1 - VIBRATION ABSORPTION SYSTEM OF HUB MOTOR AND APPLICATION THEREOF

US20260128641A1US 20260128641 A1US20260128641 A1US 20260128641A1US-20260128641-A1

Abstract

The present application discloses a vibration absorption system of a hub motor and an application thereof. The vibration absorption system of the hub motor comprises a brake, a vibration absorption mechanism, a torque transmission mechanism, and a hub motor; the brake is primarily used for braking and torque transmission; the vibration absorption mechanism is used for reducing an acting force of a weight of the motor on a vehicle hub, reducing hub loads, and increasing a reaction speed of the hub; and the torque transmission mechanism is used for indirectly transmitting rotational torque of the motor to the vehicle hub, and at the same time, for preventing the vehicle hub from transmitting a high-frequency large-magnitude impact force to the hub motor together with the vibration absorption mechanism and reducing an unsprung mass of a vehicle using the hub motor.

Inventors

Peixiang ZHANG

Assignees

Liujia Qiqu Technology (Suzhou) Co., Ltd.

Dates

Publication Date: 20260507
Application Date: 20251230
Priority Date: 20231121

Claims (13)

1 . A vibration absorption system of a hub motor, comprising: a hub, a hub motor, a torque transmission mechanism, a vibration absorption mechanism, and a pull-up vibration absorber, wherein the torque transmission mechanism comprises a driving disc drivingly connected to the hub motor through an intermediate disc, the driving disc is connected to the hub, the intermediate disc is drivingly connected to the hub motor, and two sides of the intermediate disc are connected to the hub motor and the driving disc through several connecting rods, respectively; a vibration absorption mechanism comprises a steering knuckle, the steering knuckle is rotationally connected to the driving disc, and the hub motor is slidingly connected to the steering knuckle or slidingly connected to a frame through connection rods; and the pull-up vibration absorber has one end connected to the hub motor and the other end connected to a frame of a vehicle.
2 . The vibration absorption system of a hub motor according to claim 1 , wherein the hub motor is an inner-rotor motor or an axial flux motor, and comprises a stator disposed in a housing, a rotor, and a rotor shaft drivingly connected to the rotor, the rotor shaft is of a hollow structure, and the intermediate disc is drivingly connected to the hub motor through a planetary mechanism.
3 . The vibration absorption system of a hub motor according to claim 2 , wherein the planetary mechanism comprises an internal gear ring disposed on an outer wall of the rotor shaft, an external gear ring disposed on an inner wall of the housing, and several planet gears disposed on a first planet carrier, one end of the first planet carrier that is far away from the planet gears is drivingly connected to the intermediate disc, and the ends of the planet gears that are far away from the torque transmission mechanism are provided with a second planet carrier.
4 . The vibration absorption system of a hub motor according to claim 1 , wherein the hub motor is an outer-rotor motor and comprises a motor front cover, a rotor iron core, permanent magnets, a stator iron core, a stator support, a motor bearing, and a motor rear cover.
5 . The vibration absorption system of a hub motor according to claim 4 , wherein the steering knuckle comprises a connecting plate as well as a connecting shaft and a connector which are disposed on two sides of the connecting plate, respectively, and a side surface of the connecting plate that is close to the hub motor is slidingly connected to a side surface of the stator support.
6 . The vibration absorption system of a hub motor according to claim 4 , wherein each connection rod has one end connected to the side surface of the stator support, respectively, and the other end connected to the frame.
7 . The vibration absorption system of a hub motor according to claim 4 , wherein the intermediate disc is drivingly connected to the motor front cover through several connecting rods, a brake bottom plate and a brake shoe assembly for braking are disposed in the driving disc, the brake bottom plate is fixed to the steering knuckle, a center block is slidingly disposed in the stator support, an end surface of one side of the brake bottom plate is fixed to the center block, vibration absorption springs and a vertical vibration absorber are connected between the center block and the stator support, and the stator support has the side surface provided with a first fixing post and is connected to the frame of the vehicle through a diagonal vibration absorber.
8 . The vibration absorption system of a hub motor according to claim 1 , wherein one end of each connecting rod disposed close to the driving disc is connected to the driving disc through a first shaft pin, one end of each connecting rod disposed close to the hub motor is connected to the hub motor through a second shaft pin, one end of each connecting rod that is far away from the corresponding first shaft pin or the corresponding second shaft pin is connected to the intermediate disc through a third shaft pin, the first shaft pins, the second shaft pins and the third shaft pins are respectively arrayed on a circumference of the same diameter size at an equal interval, and a number of the connecting rods disposed between the driving disc and the intermediate disc and a number of the connecting rods disposed between the motor front cover and the intermediate disc are at least 3.
9 . The vibration absorption system of a hub motor according to claim 8 , wherein rotating arms respectively corresponding to the first shaft pins are disposed on the outer wall of the driving disc in a protruding manner, and the intermediate disc is disposed between the rotating arms and the hub motor and is sleeved on the driving disc in a suspended manner.
10 . The vibration absorption system of a hub motor according to claim 8 , wherein a rectangular slot is disposed in a middle of the stator support, two sides of the center block are slidingly connected to inner walls of two opposite sides of the rectangular slot through guide rails and sliding blocks, respectively, side surfaces of the stator support and the center block that are close to the diagonal vibration absorber are respectively provided with second fixing posts for mounting of the vertical vibration absorber, and the vibration absorption springs are respectively disposed between the center block and side walls of the rectangular slot that are perpendicular to the guide rails.
11 . The vibration absorption system of a hub motor according to claim 8 , wherein the guide rails are disposed on a side surface of the stator support that is far away from the intermediate disc in parallel, and the center block is slidingly connected to the guide rails through the sliding blocks.
12 . A wheel, comprising the vibration absorption system of a hub motor according to claim 1 , wherein a hub is sleeved with a tire.
13 . A vehicle, comprising the tire according to claim 12 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The application claims priority to Chinese patent application No. 2023115588142, filed on Nov. 21, 2023, Chinese patent application No. 2024208673028 and 2024208671906, filed on Apr. 24, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present application relates to the technical field of vehicle hub motors, and particularly relates to a vibration absorption system of a hub motor and an application thereof. BACKGROUND With the development of new energy technologies, the popularity of new energy electric vehicles is higher and higher; in recent years, main engine plants and component suppliers in various countries around the world are making the layout in the field of vehicle hub motors, which clearly shows that the hub motors will be the development direction of the new energy vehicle industry in future, but the hub motor design still has many technical difficulties at present, for example, the inner space of wheels is limited, the requirements for the power density performance of the motors are high, the design difficulty is large, and the mounting of brake discs is limited; for example, the hub motors will be subjected to large road impact loads, and the requirements for vibration resistance of motors are severe; existing inner-rotor and outer-rotor hub motors are directly fixed on the vehicle hubs, the weights of the motors are generally designed at around 30 Kg, greatly increasing the unsprung mass of the vehicles, so that the overall mass inertia of the vehicle hubs is increased, and the vibration absorption reaction is dull during running on uneven roads, and the comfort and manoeuvrability of driving the vehicles are affected; and if the hub motors are directly connected to the hubs, the hubs transmit high-frequency large-amplitude impacts received directly to the hub motors, affecting the internal structural stability and service life of the motors. The hub motors have restricted the development of the new energy vehicles. SUMMARY An objective of the present disclosure is to provide a vibration absorption system of a hub motor, a vibration absorption mechanism and a torque transmission mechanism are provided between the hub motor and a hub as well as a frame, so as to solve the problem of vibration caused by an increase in unsprung mass of the hub motor and running on an uneven road surface in order to overcoming the shortcomings of the prior art. To achieve the above objective, the present disclosure provides technical solutions as follows: An embodiment of the present application discloses a vibration absorption system of a hub motor, including a hub, a hub motor, a torque transmission mechanism, a vibration absorption mechanism, and a pull-up vibration absorber, where the torque transmission mechanism includes a driving disc drivingly connected to the hub motor through an intermediate disc, the driving disc is connected to the hub, the intermediate disc is drivingly connected to the hub motor, and two sides of the intermediate disc are connected to the hub motor and the driving disc through several connecting rods, respectively;a vibration absorption mechanism includes a steering knuckle, the steering knuckle is rotationally connected to the driving disc, and the hub motor is slidingly connected to the steering knuckle or slidingly connected to a frame through connection rods; andthe pull-up vibration absorber has one end connected to the hub motor and the other end connected to a frame of a vehicle. Further, in the vibration absorption system of the hub motor described above, the hub motor is an inner-rotor motor or an axial flux motor, and comprises a stator disposed in a housing, a rotor, and a rotor shaft drivingly connected to the rotor, the rotor shaft is of a hollow structure, and the intermediate disc is drivingly connected to the hub motor through a planetary mechanism. Further, in the vibration absorption system of the hub motor described above, the planetary mechanism includes an internal gear ring disposed on an outer wall of the rotor shaft, an external gear ring disposed on an inner wall of the housing, and several planet gears disposed on a first planet carrier, one end of the first planet carrier that is far away from the planet gears is drivingly connected to the intermediate disc, and the ends of the planet gears that are far away from the torque transmission mechanism are provided with a second planet carrier. Further, in the vibration absorption system of the hub motor described above, the hub motor is an outer-rotor motor and includes a motor front cover, a rotor iron core, permanent magnets, a stator iron core, a stator support, a motor bearing, and a motor rear cover. Further, in the vibration absorption system of the hub motor described above, the steering knuckle includes a connecting plate as well as a connecting shaft and a connector which are disposed on two sides of the connecting plat