CN117656742A

CN117656742A - Suspension device and vehicle with same

Info

Publication number: CN117656742A
Application number: CN202310323284.7A
Authority: CN
Inventors: 凌和平; 张小雨; 孙宪猛; 姚渊; 章峰
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2024-03-08
Anticipated expiration: 2043-03-23

Abstract

The invention discloses a suspension device and a vehicle with the same. The suspension device includes: the linear motor assembly comprises a linear motor, at least one cavity is formed in the linear motor, and hydraulic oil is arranged in the cavity; the radiator is provided with a radiator inlet and a radiator outlet, and hydraulic oil in the cavity enters the radiator from the radiator inlet and flows back to the cavity from the radiator outlet. According to the suspension device, the radiator is arranged, so that hydraulic oil of the linear motor can be cooled, the temperature of the linear motor is reduced, and the service life of the linear motor is prolonged.

Description

Suspension device and vehicle with same

Technical Field

The invention relates to the technical field of vehicles, in particular to a suspension device and a vehicle with the suspension device.

Background

In the related art, heat is generated when the linear motor works, so that the working temperature of the linear motor is increased, and the service life of the linear motor is influenced.

Disclosure of Invention

The present invention aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the invention provides a suspension device which has a cooling function so as to ensure that the suspension device is in a good working state.

The invention also provides a vehicle with the suspension device.

The suspension device according to the embodiment of the invention comprises: the linear motor assembly comprises a linear motor, at least one cavity is formed in the linear motor, and hydraulic oil is arranged in the cavity; the radiator is provided with a radiator inlet and a radiator outlet, and hydraulic oil in the cavity enters the radiator from the radiator inlet and flows back to the cavity from the radiator outlet.

According to the suspension device provided by the embodiment of the invention, the radiator is arranged to cool the hydraulic oil of the linear motor, so that the temperature of the linear motor is reduced, and the service life of the linear motor is prolonged.

According to some embodiments of the invention, the chamber comprises a first chamber and a second chamber, hydraulic oil is arranged in the first chamber and the second chamber, and hydraulic oil in one chamber of the first chamber and the second chamber enters the radiator from the radiator inlet and then enters the other chamber from the radiator outlet.

According to some embodiments of the invention, the first chamber has a first chamber interface, the second chamber has a second chamber interface, the suspension device further comprises a connecting pipeline, the connecting pipeline comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is connected with the first chamber interface, the second interface is connected with the second chamber interface, the third interface is connected with the radiator inlet, the fourth interface is connected with the radiator outlet, and hydraulic oil flows between the linear motor and the radiator through the connecting pipeline.

According to some embodiments of the invention, the connecting line comprises: the first main path and the second main path, wherein one end of the first main path is the first interface, and the other end of the first main path is the fourth interface; one end of the second main path is the second interface, and the other end of the second main path is the third interface.

According to some embodiments of the invention, the connecting line further comprises: the device comprises a first branch, a second branch, a first main unidirectional valve, a second main unidirectional valve, a first branch unidirectional valve and a second branch unidirectional valve, wherein one end of the first branch is connected with the first main road at a first branch first connecting point, and the other end of the first branch is connected with the second main road at a first branch second connecting point; one end of the second branch is connected with the second main road at a second branch second connection point, the other end of the second branch is connected with the first main road at a second branch first connection point, the first branch first connection point is closer to the first interface than the second branch first connection point, and the second branch second connection point is closer to the second interface than the first branch second connection point; the first main check valve is arranged between the second branch first connecting point and the first branch first connecting point and allows hydraulic oil to flow from the second branch first connecting point to the first branch first connecting point; the second main check valve is arranged between the second branch second connecting point and the first branch second connecting point and allows hydraulic oil to flow from the second branch second connecting point to the first branch second connecting point; the first branch check valve is arranged on the first branch and allows hydraulic oil to flow from the first branch first connecting point to the first branch second connecting point; the second branch check valve is disposed on the second branch and allows hydraulic oil to flow from the second branch first connection point to the second branch second connection point.

According to some embodiments of the invention, the linear motor comprises a motor stator and a motor rotor, wherein a containing space is formed in the motor stator, the motor rotor is movably arranged in the containing space, the first chamber is positioned at one end of the motor rotor, and the second chamber is positioned at the other end of the motor rotor.

According to some embodiments of the invention, a first one-way throttle valve is arranged at one end of the motor rotor, a second one-way throttle valve is arranged at the other end of the motor rotor, a third chamber is defined in the motor rotor, hydraulic oil is arranged in the third chamber, the third chamber is communicated with the first chamber through the first one-way throttle valve, and the third chamber is communicated with the second chamber through the second one-way throttle valve.

According to some embodiments of the invention, the first one-way throttle valve and the second one-way throttle valve each comprise a one-way valve portion and a throttle valve portion, the one-way valve portion being open and the throttle valve portion being closed when the first one-way throttle valve and the second one-way throttle valve are positively conducted; when the first one-way throttle valve and the second one-way throttle valve are reversely conducted, the one-way valve part is closed, and the throttle valve part is opened.

According to some embodiments of the invention, the linear motor further comprises: the first pressure accumulator is positioned outside the linear motor and is connected with the first chamber, and/or the second pressure accumulator is positioned outside the linear motor and is connected with the second chamber.

According to some embodiments of the invention, a switching valve is arranged on a connecting pipeline between the linear motor and the radiator, and when the switching valve is opened, the hydraulic oil can circulate between the linear motor and the radiator; when the switch valve is closed, the linear motor is isolated from the radiator.

According to some embodiments of the present invention, a first one-way throttle valve is arranged on the first main path between the first branch first connection point and the first interface, a second one-way throttle valve is arranged on the second main path between the second branch second connection point and the second interface, the first one-way throttle valve and the second one-way throttle valve each comprise a one-way valve portion and a throttle valve portion, and when the first one-way throttle valve and the second one-way throttle valve are positively conducted, the one-way valve portion is opened, and the throttle valve portion is closed; when the first one-way throttle valve and the second one-way throttle valve are reversely conducted, the one-way valve part is closed, and the throttle valve part is opened.

According to some embodiments of the invention, a first damping fixed valve is arranged at one end of the motor rotor, a second damping fixed valve is arranged at the other end of the motor rotor, a third chamber is defined in the motor rotor, hydraulic oil is arranged in the third chamber, the third chamber is communicated with the first chamber through the first damping fixed valve, and the third chamber is communicated with the second chamber through the second damping fixed valve.

According to some embodiments of the invention, the linear motor further comprises a lower support column, wherein the upper end of the lower support column is connected with the motor rotor, and the lower end of the lower support column is provided with a lower swing arm connecting part.

According to some embodiments of the invention, the linear motor further comprises: the motor stator comprises an upper cover plate, an upper support column, an upper tower top mounting support and a lower cover plate, wherein the upper cover plate is used for sealing an upper end opening of the motor stator, the upper support column is fixedly connected with the upper cover plate and extends upwards, the upper tower top mounting support column is provided with a tower top vehicle body connecting part, the upper tower top mounting support column is sleeved outside the upper support column, an elastic gasket is arranged at the matching part of the upper tower top mounting support column and the upper support column, the lower cover plate is used for sealing a lower end opening of the motor stator, and the lower support column penetrates through the lower cover plate.

According to some embodiments of the invention, the linear motor assembly further comprises: go up swing arm, lower swing arm, knuckle and stopper assembly, elastic component, it has swing arm automobile body connecting portion to go up the swing arm, the swing arm has sub-frame connecting portion down, down the pillar down the swing arm connecting portion with down the swing arm links to each other, knuckle and stopper assembly's upper end with go up the swing arm pivot and link to each other, knuckle and stopper assembly's lower extreme with down the swing arm pivot links to each other, the upper end of elastic component supports motor stator, the lower extreme of elastic component is fixed in down the swing arm.

According to some embodiments of the invention, when the motor rotor protrudes outwards relative to the motor stator, the second one-way throttle valve is conducted forward, the first one-way throttle valve is conducted reversely, hydraulic oil in the second chamber enters the second main path through the second cavity interface and the second interface, enters the radiator inlet through the second main one-way valve, and hydraulic oil in the radiator further enters the first main path through the radiator outlet and enters the first chamber through the first main one-way valve.

According to some embodiments of the invention, when the motor rotor is retracted inwards relative to the motor stator, the first one-way throttle valve is conducted forwards, the second one-way throttle valve is conducted backwards, hydraulic oil in the first chamber enters the first branch through the first cavity interface and the first interface, enters the radiator inlet through the first branch one-way valve, hydraulic oil in the radiator further enters the second branch through the radiator outlet, and enters the second chamber through the second branch one-way valve.

According to another aspect of the present invention, a vehicle includes the suspension device described above.

According to the vehicle provided by the embodiment of the invention, the suspension device integrates the damping adjustment function and the cooling function, so that the working life of the linear motor is prolonged, and the stability and the working reliability of the suspension device are improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a suspension apparatus according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a linear motor according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection of a linear motor, connecting piping and a heat sink;

FIG. 4 is a schematic view showing the connection state of the connecting pipe when the lower column moves downward;

FIG. 5 is a schematic view showing the connection state of the connecting pipe when the lower column moves upward;

FIG. 6 is a schematic diagram of a connection of a linear motor, a connecting pipe and a radiator according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a connection of a linear motor, a connecting pipe and a radiator according to yet another embodiment of the present invention;

FIG. 8 is a schematic diagram of a connection of a linear motor, a connecting tube and a heat sink according to yet another embodiment of the present invention;

FIG. 9 is a schematic diagram of a connection of a linear motor, a connecting tube and a heat sink according to yet another embodiment of the present invention;

FIG. 10 is a schematic illustration of a first one-way throttle valve;

FIG. 11 is a schematic illustration of a second one-way throttle valve;

fig. 12 is a schematic view of a vehicle according to an embodiment of the invention.

Reference numerals:

vehicle 10000, suspension device 1000, linear motor assembly 100, linear motor 10, motor stator 1, motor mover 2, first chamber 31, first chamber interface 311, second chamber 32, first chamber interface 321, third chamber 33, first one-way throttle valve 41, first one-way valve portion 411, first throttle valve portion 412, second one-way throttle valve 42, second one-way valve portion 421, second throttle valve portion 422, first damping fixed valve 43, second damping fixed valve 44, switching valve 45, first accumulator 51, second accumulator 52, lower column 61, lower swing arm connection 611, upper cover plate 62, upper column 63, upper overhead mount bracket 64, elastic washer 65, lower cover plate 66, seal ring 67, oil seal 68, overhead mount bolt 69, upper swing arm 20, lower swing arm 30, knuckle and brake assembly 40, elastic member 50, spring holder 60;

Radiator 200, radiator inlet 201, radiator outlet 202;

connecting line 300, first main line 301, second main line 302, first branch 303, first branch first connection point 3031, first branch second connection point 3032, second branch 304, second branch first connection point 3041, second branch second connection point 3042, first main check valve 305, second main check valve 306, first branch check valve 307, and second branch check valve 308.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

A suspension device 1000 and a vehicle 10000 having the suspension device 1000 according to an embodiment of the present invention are described in detail below with reference to fig. 1 to 12.

Referring to fig. 1 to 9, a suspension apparatus 1000 according to an embodiment of the present invention may include a linear motor assembly 100 and a radiator 200.

The linear motor assembly 100 comprises a linear motor 10, wherein at least one chamber is arranged in the linear motor 10, and hydraulic oil is arranged in the chamber. The radiator 200 has a radiator inlet 201 and a radiator outlet 202, and hydraulic oil in the chamber enters the radiator 200 from the radiator inlet 201 and flows back to the chamber from the radiator outlet 202 after cooling in the radiator 200.

In some embodiments, the chambers include a first chamber 31 and a second chamber 32, the first chamber 31 and the second chamber 32 are closed spaces, and hydraulic oil is disposed in each of the first chamber 31 and the second chamber 32. Hydraulic oil in one of the first chamber 31 and the second chamber 32 enters the radiator 200 from the radiator inlet 201, and after cooling in the radiator 200, enters the other chamber from the radiator outlet 202.

In some embodiments, the linear motor 10 includes a motor stator 1 and a motor rotor 2, a housing space is formed in the motor stator 1, the motor rotor 2 is movably disposed in the housing space, and the motor rotor 2 is in contact fit with the motor stator 1, the first chamber 31 is located at one end of the motor rotor 2, and the second chamber 32 is located at the other end of the motor rotor 2. Referring to fig. 2 to 9, the first chamber 31 is located at the upper end of the mover 2, and the second chamber 32 is located at the lower end of the mover 2.

In some embodiments, the radiator 200 may include a radiator housing, a radiator cavity is disposed in the radiator housing, a radiator inlet 201 and a radiator outlet 202 are formed on the radiator housing, and the radiator inlet 201 and the radiator outlet 202 are both in communication with the radiator cavity. Optionally, the radiator 200 may be cooled by air cooling, so that heat of the heat dissipation housing can be taken away when air flows through the heat dissipation housing, and thus, temperature of the heat dissipation housing is reduced, and further, temperature of hydraulic oil in the heat dissipation cavity is reduced, so that the hydraulic oil entering the linear motor 10 from the radiator outlet 202 is lower in temperature, the linear motor 10 can be cooled, and the service life of the linear motor 10 is prevented from being influenced due to too high working temperature of the linear motor 10.

Optionally, heat dissipation fins may be disposed on an outer surface of the heat dissipation housing and/or a cavity wall of the heat dissipation cavity, so as to increase a heat dissipation surface area and improve heat dissipation efficiency.

Alternatively, the radiator inlet 201 may be located at the bottom of the radiator 200, and the radiator outlet 202 may be located at the top of the radiator 200, so that hydraulic oil can pass through the radiator 200 from bottom to top, filling the entire heat dissipation chamber, and thus cooling and dissipating the hydraulic oil more fully.

Alternatively, in some embodiments, hydraulic oil from a higher pressure chamber of both the first chamber 31 and the second chamber 32 can enter the radiator 200 from the radiator inlet 201 and then enter a lower pressure chamber from the radiator outlet 202 until the pressures in the two chambers are balanced. The axial movement of the motor mover 2 relative to the motor stator 1 serves as a power source for circulation of hydraulic oil, for example, when the motor mover 2 moves downward, the hydraulic oil of the second chamber 32 can enter the radiator 200 from the radiator inlet 201 and then enter the first chamber 31 from the radiator outlet 202; when the mover 2 moves upward, the hydraulic oil of the first chamber 31 can enter the radiator 200 from the radiator inlet 201 and then enter the second chamber 32 from the radiator outlet 202.

According to the suspension device 1000 of the embodiment of the invention, the radiator 200 is arranged to cool the hydraulic oil of the linear motor 10, so that the temperature of the linear motor 10 is reduced, and the service life of the linear motor 10 is prolonged. In order to ensure that the temperature of the hydraulic oil in the linear motor assembly 100 is within a required range, the hydraulic oil in the first chamber 31 and the second chamber 32 is led out and communicated to the external radiator 200, and the hydraulic oil flows back to the first chamber 31 and the second chamber 32 after the radiator 200 cools and dissipates heat. The axial movement of the motor rotor 2 of the linear motor 10 is used as a power source for hydraulic oil circulation when the vehicle 10000 runs, so that the cooling requirement of the linear motor assembly 100 is met under the condition of no external power source, and the energy consumption is reduced.

In some embodiments of the present invention, the first chamber 31 has a first chamber interface 311, the second chamber 32 has a second chamber interface 321, hydraulic oil in the first chamber 31 can enter and exit the first chamber 31 through the first chamber interface 311, and hydraulic oil in the second chamber 32 can enter and exit the second chamber 32 through the second chamber interface 321.

In some embodiments not shown in the drawings, the first chamber interface 311 is directly connected to the radiator inlet 201, and the second chamber interface 321 is directly connected to the radiator outlet 202, so that the radiator 200 is closer to the linear motor assembly 100, and the connecting pipeline 300 may not be provided between the radiator 200 and the linear motor assembly 100, or a simple connecting pipe may be provided only between the first chamber interface 311 and the radiator inlet 201, and between the second chamber interface 321 and the radiator outlet 202, so that the suspension device 1000 is compact and simple. When the mover 2 moves upward, the hydraulic oil of the first chamber 31 can enter the radiator 200 from the radiator inlet 201 and then enter the second chamber 32 from the radiator outlet 202. When the motor mover 2 moves downward, the radiator outlet 202 may serve as a liquid inlet, the radiator inlet 201 may serve as a liquid outlet, and hydraulic oil of the second chamber 32 may enter the radiator 200 from the liquid inlet and then enter the first chamber 31 from the liquid outlet.

In some embodiments of the present invention, referring to fig. 3 to 9, the suspension apparatus 1000 may further include a connection line 300, the connection line 300 including a first interface connected with the first chamber interface 311, a second interface connected with the second chamber interface 321, a third interface connected with the radiator inlet 201, and a fourth interface connected with the radiator outlet 202, and hydraulic oil flowing between the linear motor 10 and the radiator 200 through the connection line 300. In this way, the radiator 200 may be disposed at a position far from the linear motor assembly 100, for example, the radiator 200 may be disposed in the front compartment, which is advantageous for reasonably utilizing the space of the vehicle 10000.

In some embodiments of the present invention, as shown with reference to fig. 3-9, the connecting line 300 may include: a first main path 301 and a second main path 302, wherein one end of the first main path 301 is a first interface, and the other end of the first main path 301 is a fourth interface; one end of the second main path 302 is a second interface, and the other end of the second main path 302 is a third interface.

In some embodiments of the invention, the first chamber interface 311 is directly connected to the heat sink inlet 201 through the first main path 301 and the second chamber interface 321 is directly connected to the heat sink outlet 202 through the second main path 302. Thus, when the motor mover 2 moves upward, the hydraulic oil of the first chamber 31 can enter the radiator 200 from the radiator inlet 201 via the first main passage 301, and then enter the second chamber 32 from the radiator outlet 202 via the second main passage 302. When the motor rotor 2 moves downward, at this time, the radiator outlet 202 may serve as a liquid inlet, the radiator inlet 201 may serve as a liquid outlet, and hydraulic oil in the second chamber 32 may enter the radiator 200 from the liquid inlet via the second main path 302, and then enter the first chamber 31 from the liquid outlet via the first main path 301.

In some embodiments of the present invention, referring to fig. 3-9, the connecting line 300 may further include: the first branch 303, the second branch 304, the first main unidirectional valve 305, the second main unidirectional valve 306, the first branch unidirectional valve 307 and the second branch unidirectional valve 308, wherein one end of the first branch 303 is connected with the first main path 301 at a first branch first connection point 3031, and the other end of the first branch 303 is connected with the second main path 302 at a first branch second connection point 3032; one end of the second branch 304 is connected to the second main circuit 302 at a second branch second connection point 3042, and the other end of the second branch 304 is connected to the first main circuit 301 at a second branch first connection point 3041. The first branch first connection point 3031 is closer to the first interface than the second branch first connection point 3041, and the second branch second connection point 3042 is closer to the second interface than the first branch second connection point 3032.

The first main single-way valve 305 is disposed between the second branch first connection point 3041 and the first branch first connection point 3031, and the first main single-way valve 305 allows hydraulic oil to flow from the second branch first connection point 3041 to the first branch first connection point 3031, but does not allow hydraulic oil to flow from the first branch first connection point 3031 to the second branch first connection point 3041. The second master check valve 306 is disposed between the second branch second connection point 3042 and the first branch second connection point 3032, and the second master check valve 306 allows hydraulic oil to flow from the second branch second connection point 3042 to the first branch second connection point 3032 without allowing hydraulic oil to flow from the first branch second connection point 3032 to the second branch second connection point 3042. The first branch check valve 307 is provided on the first branch 303, and the first branch check valve 307 allows hydraulic oil to flow from the first branch first connection point 3031 to the first branch second connection point 3032, but does not allow hydraulic oil to flow from the first branch second connection point 3032 to the first branch first connection point 3031. The second branch check valve 308 is provided on the second branch 304, and the second branch check valve 308 allows hydraulic oil to flow from the second branch first connection point 3041 to the second branch second connection point 3042, but does not allow hydraulic oil to flow from the second branch second connection point 3042 to the second branch first connection point 3041.

According to the suspension device 1000 of the embodiment of the invention, the connecting pipeline 300 is provided, and the connecting pipeline 300 comprises the first main pipeline 301, the second main pipeline 302, the first branch pipeline 303, the second branch pipeline 304, the first main check valve 305, the second main check valve 306, the first branch check valve 307 and the second branch check valve 308, so that hydraulic oil can always enter from the radiator inlet 201 below the radiator 200 and flow out from the radiator outlet 202 above the radiator 200 in the up-and-down movement process of the motor rotor 2 of the linear motor 10, and the heat dissipation effect is good.

In some embodiments of the present invention, referring to fig. 2-5 and 7-8, one end of the motor mover 2 is provided with a first one-way throttle valve 41, and the other end of the motor mover 2 is provided with a second one-way throttle valve 42, for example, the first one-way throttle valve 41 is provided at the upper end of the motor mover 2 and the second one-way throttle valve 42 is provided at the lower end of the motor mover 2. A third chamber 33 is defined in the motor rotor 2, hydraulic oil is arranged in the third chamber 33, the third chamber 33 is communicated with the first chamber 31 through a first one-way throttle valve 41, and the third chamber 33 is communicated with the second chamber 32 through a second one-way throttle valve 42. Alternatively, the motor stator 1 and the motor rotor 2 are both in cylindrical structures, and the outer peripheral surface of the motor rotor 2 is in contact fit with the inner peripheral surface of the motor stator 1. The first one-way throttle valve 41 and the second one-way throttle valve 42 are provided at both end openings of the motor mover 2.

The first one-way throttle valve 41 and the second one-way throttle valve 42 are capable of adjusting damping of the linear motor 10. Specifically, when the vehicle 10000 is traveling normally, the vibration of the road surface is transmitted to the lower support post 61 connected to the motor mover 2, and the lower support post 61 is transmitted to the motor mover 2, so that the lower support post 61 and the motor mover 2 move in the axial direction relative to the motor stator 1, and the relative movement is attenuated by the damping caused by the first one-way throttle valve 41, the second one-way throttle valve 42, and the hydraulic oil in the linear motor 10. The first and second one-way throttles 41, 42 are shown only schematically in fig. 2-5 and 7-8, and are not representative of their structure and function in the recovery and compression modes, respectively. The inside fluid of linear electric motor 10 communicates to radiator 200 through connecting line 300 or the inside fluid of linear electric motor 10 directly communicates to radiator 200, and the whole inside fluid of suspension assembly 1000 forms the circulation for the hydraulic oil circulation flow among these three cavities of first cavity 31, third cavity 33, second cavity 32 takes away linear electric motor 10 and produces heat with fluid friction, reaches the purpose of cooling linear electric motor 10 and hydraulic oil.

The suspension apparatus 1000 according to the embodiment of the present invention includes the radiator 200, the first one-way throttle valve 41, and the second one-way throttle valve 42, integrating the cooling function and the damping control function.

In some embodiments of the present invention, referring to fig. 10 to 11, the first one-way throttle valve 41 and the second one-way throttle valve 42 each include a one-way valve portion and a throttle valve portion, and when the first one-way throttle valve 41 and the second one-way throttle valve 42 are positively conducted, the one-way valve portion is opened and the throttle valve portion is closed; when the first one-way throttle valve 41 and the second one-way throttle valve 42 are reversely conducted, the one-way valve portion is closed and the throttle valve portion is opened. Specifically, the first one-way throttle valve 41 includes a first one-way valve portion 411 and a first throttle valve portion 412, and the second one-way throttle valve 42 includes a second one-way valve portion 421 and a second throttle valve portion 422. When the first one-way throttle valve 41 is turned on in the forward direction, the first one-way valve portion 411 is opened, and the first throttle valve portion 412 is closed; when the first one-way throttle valve 41 is reversely turned on, the first one-way valve portion 411 is closed, and the first throttle valve portion 412 is opened. When the second one-way throttle valve 42 is turned on in the forward direction, the second one-way valve portion 421 is opened, and the second throttle valve portion 422 is closed; when the second one-way throttle valve 42 is reversely turned on, the second one-way valve portion 421 is closed and the second throttle valve portion 422 is opened.

Fig. 3 shows the control principle of the integration of the damping function and the cooling function of the linear motor 10. The linear motor 10 has a first chamber 31, a second chamber 32, and a third chamber 33 inside, the first chamber 31 and the third chamber 33 are communicated through a first one-way throttle valve 41, and the third chamber 33 and the second chamber 32 are communicated through a second one-way throttle valve 42. The motor rotor 2 is embedded into the motor stator 1, and the motor stator 1 acts with the motor rotor 2 after being electrified to enable the motor rotor 2 to axially move, so that the function of adjusting the height of the suspension is achieved. When the motor stator 1 is not energized, the linear motor 10 is used only as a damper. The relative movement of the motor rotor 2 and the motor stator 1 can generate certain damping, but the damping adjustment is mainly acted on by the first one-way throttle valve 41, the second one-way throttle valve 42 and the motor rotor 2. The linear motor 10 is externally provided with a first main check valve 305, a second main check valve 306, a first branch check valve 307 and a second branch check valve 308, so as to ensure that hydraulic oil can always enter from the radiator inlet 201 and exit from the radiator outlet 202 in the up-and-down movement process of the motor rotor 2.

In some embodiments of the present invention, when the motor rotor 2 protrudes outwards relative to the motor stator 1, the second one-way throttle valve 42 is forward conducting, the first one-way throttle valve 41 is reverse conducting, hydraulic oil in the second chamber 32 enters the second main path 302 via the second chamber interface 321 and the second interface, enters the radiator inlet 201 via the second main one-way valve 306, and hydraulic oil in the radiator 200 further enters the first main path 301 via the radiator outlet 202 and enters the first chamber 31 via the first main one-way valve 305.

The upward arrow in fig. 4 shows the flow direction of the hydraulic oil in a stretched state of the lower leg 61 of the linear motor 10. Under the stretching action, the motor rotor 2 moves downwards, the motor rotor 2 stretches outwards relative to the motor stator 1, the second one-way throttle valve 42 is positively conducted, the second throttle valve part 422 does not work, the second one-way valve part 421 is opened, the first throttle valve part 412 of the first one-way throttle valve 41 works, the first one-way valve part 411 is closed, a small amount of hydraulic oil in the third chamber 33 enters the first chamber 31, and the opening and closing of the first throttle valve part 412 of the first one-way throttle valve 41 can be controlled to control the damping under the stretching action. During the downward movement of the motor rotor 2, most of the liquid in the high-pressure second chamber 32 flows out of the lower second chamber interface 321, enters the radiator inlet 201 through the second main check valve 306, is cooled and discharged from the radiator outlet 202, and enters the low-pressure first chamber 31 through the first main check valve 305.

In some embodiments of the present invention, when the motor rotor 2 is retracted inwards relative to the motor stator 1, the first one-way throttle valve 41 is turned on in a forward direction, the second one-way throttle valve 42 is turned on in a reverse direction, hydraulic oil in the first chamber 31 enters the first branch 303 through the first chamber interface 311 and the first interface, enters the radiator inlet 201 through the first one-way valve 307, and hydraulic oil in the radiator 200 further enters the second branch 304 through the radiator outlet 202, and enters the second chamber 32 through the second one-way valve 308.

The downward arrow in fig. 5 shows the flow direction of the hydraulic oil in a compressed state of the lower leg 61 of the linear motor 10. Under the compression action, the motor rotor 2 moves upwards, the motor rotor 2 retracts inwards relative to the motor stator 1, the first one-way throttle valve 41 is positively conducted, the first throttle valve part 412 does not work, the first one-way valve part 411 is opened, the second throttle valve part 422 of the second one-way throttle valve 42 works, the second one-way valve part 421 is closed, a small amount of hydraulic oil in the third chamber 33 enters the second chamber 32, and the opening and closing size of the second throttle valve part 422 of the second one-way throttle valve 42 can be controlled to control the damping under the compression action. During the upward movement of the motor rotor 2, most of the liquid in the high-pressure first chamber 31 flows out from the upper first chamber interface 311, enters the radiator inlet 201 through the first one-way valve 307, is cooled and discharged from the radiator outlet 202, and enters the low-pressure second chamber 32 through the second one-way valve 308.

By arranging the first main check valve 305, the second main check valve 306, the first branch check valve 307 and the second branch check valve 308, hydraulic oil can enter from the radiator inlet 201 at the bottom and be discharged from the radiator outlet 202 at the top no matter the motor rotor 2 moves up or down. During the up-and-down movement of the motor rotor 2, the hydraulic oil exchange and the cooling external circulation of the first chamber 31, the third chamber 33 and the second chamber 32 are realized. The magnitude of damping of the suspension apparatus 1000 can be adjusted by controlling the throttle opening degrees of the first one-way throttle valve 41 and the second one-way throttle valve 42.

In some embodiments of the present invention, referring to fig. 7-8, the linear motor 10 may further include a first accumulator 51 and/or a second accumulator 52, the first accumulator 51 being located outside the linear motor 10, the first accumulator 51 being connected to the first chamber 31, the second accumulator 52 being located outside the linear motor 10, and the second accumulator 52 being connected to the second chamber 32. The accumulator is capable of regulating the impact of hydraulic oil. Alternatively, the accumulator may be provided at only one of the first chamber interface 311 and the second chamber interface 321. Or alternatively, accumulators are arranged at the first cavity interface 311 and the second cavity interface 321 of the linear motor 10 to regulate the impact caused by the reciprocating oil of the motor rotor 2, and fig. 7 shows the control principle of the integration of the damping function and the cooling function of the linear motor 10 with the accumulators. A first accumulator 51 is provided at the upper end of the linear motor 10, and a second accumulator 52 is provided at the lower end of the linear motor 10 for reducing the commutation shock of the cooling loop.

In some embodiments of the present invention, referring to fig. 8, a switching valve 45 is provided on a connection line 300 between the linear motor 10 and the radiator 200, and hydraulic oil can flow between the linear motor 10 and the radiator 200 when the switching valve 45 is opened; when the switching valve 45 is closed, the linear motor 10 is isolated from the radiator 200. Alternatively, the on-off valve 45 may be a normally open valve, which is maintained in a normally open state when the cooling of the linear motor 10 is required, and may be closed when the cooling of the linear motor 10 is not required.

Optionally, an on-off valve 45 may be added to the device of fig. 7, as shown in fig. 8. The suspension damping is controlled by the first one-way throttle valve 41, the second one-way throttle valve 42, and the on-off valve 45. The on/off of the connection pipe 300 is controlled by controlling the on/off of the on/off valve 45. When the on-off valve 45 is opened, the connecting pipeline 300 also plays a certain damping role, and the first one-way throttle valve 41 and the second one-way throttle valve 42 play a role in auxiliary damping adjustment. When the on-off valve 45 is closed, damping adjustment is performed only by the first one-way throttle valve 41 and the second one-way throttle valve 42 inside the linear motor 10. By controlling the opening and closing of the on-off valve 45, the suspension damping force can be flexibly controlled.

Alternatively, the switching valve 45 may be disposed on the first main path 301 between the first branch first connection point 3031 and the first interface, or may be disposed on the second main path 302 between the second branch second connection point 3042 and the second interface.

Alternatively, the on-off valve 45 may also be provided at the first chamber interface 311 of the first chamber 31 or at the second chamber interface 321 of the second chamber 32.

In some embodiments of the present invention, referring to fig. 6 and 9, a unidirectional throttle valve is not provided in the linear motor 10, but a first unidirectional throttle valve 41 is provided on the first main path 301 between the first branch first connection point 3031 and the first interface, a second unidirectional throttle valve 42 is provided on the second main path 302 between the second branch second connection point 3042 and the second interface, each of the first unidirectional throttle valve 41 and the second unidirectional throttle valve 42 includes a unidirectional valve portion and a throttle valve portion, and when the first unidirectional throttle valve 41 and the second unidirectional throttle valve 42 are positively conducted, the unidirectional valve portion is opened and the throttle valve portion is closed; when the first one-way throttle valve 41 and the second one-way throttle valve 42 are reversely conducted, the one-way valve portion is closed and the throttle valve portion is opened.

The first one-way throttle valve 41 and the second one-way throttle valve 42 are capable of adjusting damping of the linear motor 10 and are similar in structure and operation to the first one-way throttle valve 41 and the second one-way throttle valve 42 in the above embodiments, and are not described again here.

In some embodiments of the present invention, referring to fig. 6, a first damping fixed valve 43 is provided at one end of the motor mover 2, a second damping fixed valve 44 is provided at the other end of the motor mover 2, a third chamber 33 is defined in the motor mover 2, hydraulic oil is provided in the third chamber 33, the third chamber 33 is communicated with the first chamber 31 through the first damping fixed valve 43, and the third chamber 33 is communicated with the second chamber 32 through the second damping fixed valve 44. In this way, the linear motor 10 is not provided with a one-way throttle valve inside, but the first one-way throttle valve 41 is provided in the first main path 301 between the first branch first connection point 3031 and the first interface, and the second one-way throttle valve 42 is provided in the second main path 302 between the second branch second connection point 3042 and the second interface. The purpose of adjusting the suspension damping can also be achieved by providing a one-way throttle valve on the connecting line 300.

In some embodiments of the present invention, referring to fig. 9, the linear motor 10 may further include: the first accumulator 51 is located outside the linear motor 10, and the first accumulator 51 is connected to the first chamber 31, and/or the second accumulator 52 is located outside the linear motor 10, and the second accumulator 52 is connected to the second chamber 32. The structure and operation principle of the first and second accumulators 51 and 52 are similar to those of the first and second accumulators 51 and 52 in the above embodiment, and a detailed description thereof will be omitted.

Alternatively, the suspension device 1000 according to the present invention may eliminate the valve system inside the linear motor 10 from the viewpoint of convenience in arrangement, simplify the upper, middle and lower three chambers shown in fig. 3 into two chambers, reduce the radial size of the linear motor 10, and move the first and second one-way throttle valves 41 and 42 of fig. 3 to the outside of the linear motor assembly 100, as shown in fig. 9. The damping force adjustment and cooling effects to a certain extent can be achieved while the space arrangement requirements of the small-volume linear motor 10 are satisfied.

In some embodiments of the present invention, referring to fig. 2 to 9, the linear motor 10 may further include a lower support post 61, an upper end of the lower support post 61 being connected to the motor mover 2, and a lower end of the lower support post 61 having a lower swing arm connection portion 611.

In some embodiments of the present invention, referring to fig. 2, the linear motor 10 may further include: the upper cover plate 62, the upper support 63, the upper tower top mounting bracket 64 and the lower cover plate 66, wherein the upper cover plate 62 covers the upper end opening of the motor stator 1, the upper support 63 is fixedly connected with the upper cover plate 62, the upper support 63 extends upwards, and the upper support 63 and the upper cover plate 62 can be welded and fixed or can be an integrated part. The upper tower top mounting bracket 64 has a tower top body connection portion, which may be a mounting hole, through which the tower top bracket bolt 64 passes and then is connected to the body, thereby achieving connection of the upper end of the linear motor assembly 100 to the body. The upper tower top mounting bracket 64 is sleeved outside the upper support 63, and an elastic washer 65 is arranged at the matching position of the upper tower top mounting bracket 64 and the upper support 63, and the upper tower top mounting bracket 64 is in soft connection with the upper support 63 through the elastic washer 65 so as to adapt to the swing angle change in the suspension jumping process. The lower cover 66 covers the lower end opening of the motor stator 1, and the lower support post 61 passes through the lower cover 66 so as to be connected with the lower swing arm 30.

Alternatively, the elastic washer 65 may be a rubber washer.

Fig. 2 shows the internal construction of the linear motor 10, and the upper tower top mounting bracket 64 is flexibly connected with the upper strut 63 through a rubber washer to accommodate the change of the pivot angle during suspension bounce from top to bottom. The first cavity interface 311 is a hydraulic fluid interface of the first cavity 31, and is used for communicating and guiding the internal hydraulic oil to the external radiator 200, the motor stator 1 comprises a shell and a permanent magnet, the motor stator 1, the upper support 63, the upper cover 62, the lower cover 66 and the lower support 61 together form a closed cavity, and the sealing device is used for ensuring that the internal hydraulic oil is not leaked. The middle section of the lower support column 61 is thicker, the two ends of the lower support column 61 are thinner, the first one-way throttle valve 41 is sleeved on the stepped shaft at the upper end of the lower support column 61 and is fixed through a locking nut, and the second one-way throttle valve 42 is sleeved on the stepped shaft at the lower end of the lower support column 61 and is fixed through the locking nut. The sealing ring 67 is sleeved outside the first one-way throttle valve 41, the oil seal 68 is sleeved outside the second one-way throttle valve 42, and the motor rotor 2 is fixed between the first one-way throttle valve 41 and the second one-way throttle valve 42. By the above arrangement, three closed cavities of the first chamber 31, the third chamber 33, and the second chamber 32 arranged from top to bottom are formed.

In some embodiments of the present invention, referring to fig. 1, the linear motor assembly 100 may further include: the upper swing arm 20, the lower swing arm 30, the knuckle and brake assembly 40 and the elastic piece 50 are arranged, the upper swing arm 20 is provided with a swing arm body connecting part, the lower swing arm 30 is provided with a subframe connecting part, a lower swing arm connecting part 611 of a lower support post 61 is connected with the lower swing arm 30, the upper end of the knuckle and brake assembly 40 is pivotally connected with the upper swing arm 20, the lower end of the knuckle and brake assembly 40 is pivotally connected with the lower swing arm 30, the upper end of the elastic piece 50 supports the motor stator 1, and the lower end of the elastic piece 50 is fixed on the lower swing arm 30. The elastic member 50 may be a coil spring, the bottom of which is fixed to the lower swing arm 30 through a spring fixing seat 60, and which acts as an elastic member to support the suspension.

Optionally, the swing arm body connection and the subframe connection are bushings. When the linear motor assembly 100 is mounted on the vehicle 10000, the upper swing arm 20 is connected to the vehicle body through an upper inner point bushing, the lower swing arm 30 is connected to the subframe through a lower inner point bushing, the knuckle and brake assembly 40 is connected to the outer point of the upper swing arm 20 through a ball pivot pair of an upper point, and the knuckle and brake assembly 40 is connected to the outer point of the lower swing arm 30 through a ball pivot pair of a lower point. The upper end of the linear motor assembly 100 is connected to the vehicle body through the overhead bracket bolt 64, and the lower swing arm connecting portion 611 of the lower support post 61 is connected to the lower swing arm 30, and the suspension device 1000 plays a role in rapidly adjusting the height between the vehicle body and the tire and providing damping.

The radiator 200 is symmetrically arranged at the left side and the right side of the front cabin of the vehicle 10000, and the radiator inlet 201 and the radiator outlet 202 are connected with the first cavity interface 311 and the second cavity interface 321 of the linear motor 10 through air cooling and radiating of the inlet air flow, so that the circulation cooling of hydraulic oil in the linear motor 10 is realized.

When the linear motor 10 is electrified, the motor rotor 2 can generate axial relative motion relative to the motor stator 1, the lower support column 61 is driven to axially stretch and retract, the suspension height can be adjusted, and the lifting function of the vehicle body is realized. When the suspension apparatus 1000 includes the first one-way throttle valve 41 and the second one-way throttle valve 42, the damping adjustment function of the suspension apparatus 1000 can also be achieved.

Referring to fig. 12, a vehicle 10000 according to another aspect of the present invention includes the suspension apparatus 1000 of the above-described embodiment.

According to the vehicle 10000 of the embodiment of the invention, the suspension device 1000 integrates the damping adjustment function and the cooling function, so that the service life of the linear motor 10 is prolonged, and the stability and the working reliability of the suspension device 1000 are also improved.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. A suspension device characterized by comprising:

the linear motor assembly comprises a linear motor (10), wherein at least one cavity is formed in the linear motor (10), and hydraulic oil is arranged in the cavity;

-a radiator (200), the radiator (200) having a radiator inlet (201) and a radiator outlet (202), hydraulic oil in the chamber entering the radiator (200) from the radiator inlet (201) and flowing back into the chamber from the radiator outlet (202).

2. Suspension device according to claim 1, characterized in that the chambers comprise a first chamber (31) and a second chamber (32), wherein hydraulic oil is arranged in both the first chamber (31) and the second chamber (32), wherein hydraulic oil of one of the first chamber (31) and the second chamber (32) enters the radiator (200) from the radiator inlet (201) and then enters the other chamber from the radiator outlet (202).

3. Suspension device according to claim 2, characterized in that the first chamber (31) has a first chamber interface (311) and the second chamber (32) has a second chamber interface (321), the suspension device further comprising a connecting line (300), the connecting line (300) comprising a first interface, a second interface, a third interface, a fourth interface, the first interface being connected with the first chamber interface (311), the second interface being connected with the second chamber interface (321), the third interface being connected with the radiator inlet (201) and the fourth interface being connected with the radiator outlet (202), the hydraulic oil flowing between the linear motor (10) and the radiator (200) via the connecting line (300).

4. A suspension device according to claim 3, wherein the connecting line (300) comprises:

a first main path (301), wherein one end of the first main path (301) is the first interface, and the other end of the first main path (301) is the fourth interface;

and one end of the second main path (302) is the second interface, and the other end of the second main path (302) is the third interface.

5. The suspension device according to claim 4, wherein the connecting pipe (300) further includes:

A first branch (303), wherein one end of the first branch (303) is connected with the first main path (301) at a first branch first connection point (3031), and the other end of the first branch (303) is connected with the second main path (302) at a first branch second connection point (3032);

a second branch (304), wherein one end of the second branch (304) is connected with the second main path (302) at a second branch second connection point (3042), the other end of the second branch (304) is connected with the first main path (301) at a second branch first connection point (3041), the first branch first connection point (3031) is closer to the first interface than the second branch first connection point (3041), and the second branch second connection point (3042) is closer to the second interface than the first branch second connection point (3032);

a first main single direction valve (305), the first main single direction valve (305) being arranged between the second branch first connection point (3041) and the first branch first connection point (3031) and allowing hydraulic oil to flow from the second branch first connection point (3041) to the first branch first connection point (3031);

a second main single direction valve (306), the second main single direction valve (306) being disposed between the second branch second connection point (3042) and the first branch second connection point (3032) and allowing hydraulic oil to flow from the second branch second connection point (3042) to the first branch second connection point (3032);

A first branch check valve (307), the first branch check valve (307) being provided on the first branch (303) and allowing hydraulic oil to flow from the first branch first connection point (3031) to the first branch second connection point (3032);

a second branch check valve (308), the second branch check valve (308) being disposed on the second branch (304) and allowing hydraulic oil to flow from the second branch first connection point (3041) to the second branch second connection point (3042).

6. The suspension device according to claim 5, characterized in that the linear motor (10) comprises a motor stator (1) and a motor mover (2), wherein a containing space is formed in the motor stator (1), the motor mover (2) is movably arranged in the containing space, the first chamber (31) is positioned at one end of the motor mover (2), and the second chamber (32) is positioned at the other end of the motor mover (2).

7. The suspension device according to claim 6, characterized in that a first one-way throttle valve (41) is arranged at one end of the motor rotor (2), a second one-way throttle valve (42) is arranged at the other end of the motor rotor (2), a third chamber (33) is defined in the motor rotor (2), hydraulic oil is arranged in the third chamber (33), the third chamber (33) is communicated with the first chamber (31) through the first one-way throttle valve (41), and the third chamber (33) is communicated with the second chamber (32) through the second one-way throttle valve (42).

8. The suspension device according to claim 7, wherein the first one-way throttle valve (41) and the second one-way throttle valve (42) each include a one-way valve portion and a throttle valve portion, the one-way valve portion being opened and the throttle valve portion being closed when the first one-way throttle valve (41) and the second one-way throttle valve (42) are positively conducted; when the first one-way throttle valve (41) and the second one-way throttle valve (42) are reversely conducted, the one-way valve part is closed, and the throttle valve part is opened.

9. The suspension device according to claim 8, characterized in that the linear motor (10) further comprises:

a first accumulator (51), the first accumulator (51) being located outside the linear motor (10) and being connected to the first chamber (31);

and/or a second accumulator (52), the second accumulator (52) being located outside the linear motor (10) and being connected to the second chamber (32).

10. The suspension device according to claim 8, characterized in that a switching valve (45) is provided on a connecting line (300) between the linear motor (10) and the radiator (200), and that when the switching valve (45) is opened, the hydraulic oil can flow between the linear motor (10) and the radiator (200); when the switch valve (45) is closed, the linear motor (10) is isolated from the radiator (200).

11. The suspension device according to claim 6, characterized in that a first one-way throttle valve (41) is provided on the first main path (301) between the first branch first connection point (3031) and the first interface, a second one-way throttle valve (42) is provided on the second main path (302) between the second branch second connection point (3042) and the second interface, each of the first one-way throttle valve (41) and the second one-way throttle valve (42) includes a one-way valve portion and a throttle valve portion, the one-way valve portion being opened and the throttle valve portion being closed when the first one-way throttle valve (41) and the second one-way throttle valve (42) are positively conducted; when the first one-way throttle valve (41) and the second one-way throttle valve (42) are reversely conducted, the one-way valve part is closed, and the throttle valve part is opened.

12. Suspension device according to claim 11, characterized in that one end of the motor mover (2) is provided with a first damping fixed valve (43), the other end of the motor mover (2) is provided with a second damping fixed valve (44), a third chamber (33) is defined in the motor mover (2), hydraulic oil is provided in the third chamber (33), the third chamber (33) is communicated with the first chamber (31) through the first damping fixed valve (43), and the third chamber (33) is communicated with the second chamber (32) through the second damping fixed valve (44).

13. The suspension device according to claim 11 or 12, characterized in that the linear motor (10) further comprises:

14. The suspension device according to claim 6, wherein the linear motor (10) further comprises a lower support (61), an upper end of the lower support (61) being connected to the motor mover (2), a lower end of the lower support (61) having a lower swing arm connecting portion (611).

15. The suspension device according to claim 14, characterized in that the linear motor (10) further comprises:

an upper cover plate (62), wherein the upper cover plate (62) covers an upper end opening of the motor stator (1);

an upper strut (63), the upper strut (63) being fixedly connected to the upper cover plate (62) and extending upwardly;

the upper tower top mounting bracket (64) is provided with a tower top vehicle body connecting part, the upper tower top mounting bracket (64) is sleeved outside the upper support (63), and an elastic gasket (65) is arranged at the matching position of the upper tower top mounting bracket (64) and the upper support (63);

And a lower cover plate (66), wherein the lower cover plate (66) covers the lower end opening of the motor stator (1), and the lower support post (61) passes through the lower cover plate (66).

16. The suspension device according to claim 7, characterized in that when the motor mover (2) protrudes outward with respect to the motor stator (1), the second one-way throttle valve (42) is positively conducted, the first one-way throttle valve (41) is negatively conducted, hydraulic oil of the second chamber (32) enters the second main passage (302) via the second chamber interface (321), the second interface enters the radiator inlet (201) via the second main one-way valve (306), hydraulic oil in the radiator (200) further enters the first main passage (301) via the radiator outlet (202), and enters the first chamber (31) via the first main one-way valve (305).

17. The suspension device according to claim 7, characterized in that when the motor mover (2) is retracted inwardly with respect to the motor stator (1), the first one-way throttle valve (41) is in forward conduction, the second one-way throttle valve (42) is in reverse conduction, hydraulic oil of the first chamber (31) enters the first branch (303) via the first chamber interface (311) via the first interface, enters the radiator inlet (201) via the first branch one-way valve (307), hydraulic oil in the radiator (200) further enters the second branch (304) via the radiator outlet (202), and enters the second chamber (32) via the second branch one-way valve (308).

18. A vehicle comprising the suspension device according to any one of claims 1 to 17.