CN117823559A - Hybrid suspension actuator, suspension system and automobile - Google Patents

Abstract

The embodiment of the invention discloses a hybrid suspension actuator, which comprises: a cylindrical housing having opposite first and second ends; a cylinder fixed in the cylindrical housing; a piston dividing the inner cavity of the cylinder into a first inner cavity and a second inner cavity opposite in the direction from the first end to the second end, and the piston being relatively movable with respect to the cylinder in the direction from the first end to the second end; the piston is a permanent magnet; a piston rod having one end passing through the cylinder tube and extending out of the first end of the cylindrical housing, and the opposite end connected to the piston; the coil is arranged between the cylindrical shell and the cylinder barrel and is mutually induced with the piston; the first connecting pin is connected to one end of the piston rod, which is far away from the piston; and a second connecting pin connected to the second end of the cylindrical housing. The hybrid suspension actuator disclosed by the invention has the characteristics of compact structure and high reliability.

Description

Hybrid suspension actuator, suspension system and automobile

Technical Field

The present invention relates to the technical field of vehicles, and in particular to a hybrid suspension actuator, a suspension system and a car.

Background technique

The suspension system is an important part of the car. Its main function is to bear the body and attenuate the vibration of the body. It determines the ride comfort and handling stability of the vehicle. The automobile suspension can be divided into passive suspension, semi-active suspension, active suspension and energy-feeding semi-active/active suspension in terms of function, but there are some problems. Semi-active suspension is the most widely used suspension control technology. The current semi-active suspension is mainly composed of springs with fixed stiffness and variable damping shock absorbers. The response speed of the variable damping shock absorber is relatively slow, and its reliability and stability are poor. There is still a lot of room for improvement in the manufacturing process and measurement and control system of the shock absorber. Active suspension products are mainly hydraulic active suspensions, which have the problems of high cost, high energy consumption, complex structure and large mass of additional systems (oil supply system, etc.). Energy-feeding suspension uses electromagnetic dampers, but there are problems such as small electromagnetic thrust. To meet the thrust requirements of automobile shock absorbers, its size and weight are too large.

Therefore, there is an urgent need to provide a new suspension structure and system to solve the problems of low reliability and large size of the existing suspension system.

Summary of the invention

Therefore, in order to overcome at least some of the defects in the prior art, the embodiments of the present invention provide a hybrid suspension actuator, a suspension system and a vehicle, which have the characteristics of higher reliability and more compact structure.

Specifically, on the one hand, an embodiment of the present invention provides a hybrid suspension actuator, comprising: a cylindrical shell having a first end and a second end opposite to each other; a cylinder fixed in the cylindrical shell; a piston dividing the inner cavity of the cylinder into a first inner cavity and a second inner cavity opposite to each other in the direction from the first end to the second end, and the piston can move relative to the cylinder in the direction from the first end to the second end; the piston is a permanent magnet; a piston rod, one end of which passes through the cylinder and extends out of the first end of the cylindrical shell, and the other end opposite to it is connected to the piston; a coil is arranged between the cylindrical shell and the cylinder, and is mutually inductive with the piston; a first connecting pin is connected to the end of the piston rod away from the piston; and a second connecting pin is connected to the second end of the cylindrical shell.

In one embodiment, the hybrid suspension actuator further includes: a throttling channel, respectively communicating with the first inner cavity and the second inner cavity.

In one embodiment, the piston rod is a hollow piston rod; the piston is an annular magnet, and the piston is sleeved on the piston rod; a throttle hole is provided on the piston rod, and the throttle hole is located between the piston and the first end and is arranged adjacent to the piston; the hybrid suspension actuator connects the first inner cavity and the second inner cavity through the hollow piston rod.

In one embodiment, the hybrid suspension actuator further includes a Hall position sensor disposed between the tubular housing and the cylinder for sensing a relative position change between the piston and the cylinder.

In one embodiment, the hybrid suspension actuator further includes a photoelectric position sensor, which is disposed on the cylindrical housing or on an end of the piston rod away from the piston, and is used to sense a relative position change between the cylindrical housing and the piston rod.

Another embodiment of the present invention provides a suspension system, comprising: the hybrid suspension actuator described in any one of the aforementioned embodiments; a control terminal; a drive and energy storage control circuit, electrically connected to the control terminal and the coil of the hybrid suspension actuator, respectively; the drive and energy storage control circuit energizes the coil in response to the control instruction of the control terminal to drive the permanent magnet piston to move, or collects the current generated by the coil in response to the movement of the permanent magnet piston; a power supply component, electrically connected to the drive and energy storage control circuit.

In one embodiment, the suspension system further includes a sensor component electrically connected to the control terminal for detecting working environment data of the hybrid suspension actuator and transmitting the data to the control terminal.

In one embodiment, the suspension system further includes a suspension spring, and the suspension spring is arranged in parallel with the hybrid suspension actuator or the suspension spring is sleeved outside the hybrid suspension actuator.

In one embodiment, the control terminal is a vehicle-mounted computer, and the power supply component is a vehicle-mounted power supply.

Another embodiment of the present invention provides an automobile, comprising the hybrid suspension actuator as described in any one of the preceding embodiments or the suspension system as described in any one of the preceding embodiments, and also comprising wheels and a body, wherein the wheels are connected to the second end of the cylindrical shell, and the body is connected to the end of the piston rod away from the piston.

It can be seen from the above that the above embodiments of the present invention can achieve one or more of the following beneficial effects: by setting the piston in the cylinder as a permanent magnet and cooperating with the coil to form a structure similar to a linear motor, electromagnetic vibration reduction and hydraulic vibration reduction are integrated into one, the structure is more compact and the reliability is higher.

Other aspects and features of the present invention will become apparent from the following detailed description with reference to the accompanying drawings. It should be understood, however, that the drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. It should also be understood that, unless otherwise indicated, the drawings are not necessarily drawn to scale and are intended only to conceptually illustrate the structures and processes described herein.

BRIEF DESCRIPTION OF THE DRAWINGS

The specific implementation modes of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a hybrid suspension actuator provided by an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a suspension system provided by an embodiment of the present invention.

[Description of Reference Numerals]

10: hybrid suspension actuator; 11: cylindrical housing; 111: first end; 112: second end; 12: cylinder; 121: first inner cavity; 122: second inner cavity; 13: piston; 14: coil; 15: piston rod; 151: throttle hole; 16: first connecting pin; 17: second connecting pin;

21: Control terminal; 22: Drive and energy storage control circuit; 23: Power supply component; 24: Sensor component; 25: Suspension spring.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

It should also be noted that the division of multiple embodiments in the present invention is only for the convenience of description and should not constitute a special limitation. The features in various embodiments can be combined and referenced to each other without contradiction.

As shown in FIG1 , an embodiment of the present invention provides a hybrid suspension actuator 10, comprising a cylindrical housing 11, a cylinder 12, a piston 13, a coil 14 and a piston rod 15. The cylindrical housing 11 has a first end 111 and a second end 112 opposite to each other. The cylinder 12 is fixed in the cylindrical housing 11. The piston 13 divides the inner cavity of the cylinder 12 into a first inner cavity 121 and a second inner cavity 122 opposite to each other in the direction from the first end 111 to the second end 112. The piston 13 can move relative to the cylinder 12 in the direction from the first end 111 to the second end 112. The piston 13 is a permanent magnet. The coil 14 is arranged between the cylindrical housing 11 and the cylinder 12, and is mutually inductive with the piston 13. One end of the piston rod 15 extends out of the first end 111 of the cylindrical housing 11 through the cylinder 12, and the other opposite end is connected to the piston 13.

Referring to the orientation shown in FIG. 1 , the first end 111 is the upper end of the cylindrical shell 11, and the second end 112 is the lower end of the cylindrical shell 11. The piston 13 divides the inner cavity of the cylinder 12 into two parts, the upper part is the first inner cavity 121, and the lower part is the second inner cavity 122. And the piston 13 can move up and down relative to the cylinder 12. One end of the piston rod 15 is connected to the piston 13, and the other end extends out of the cylindrical shell 11 from the upper end of the cylinder 12. In practical application, a sealing ring can also be installed at the opening of the cylinder 12 for the piston rod 15 to extend, so as to prevent oil from leaking. Among them, the piston 13 is a permanent magnet, and the coil 14 is a three-phase winding coil. The coil 14 and the piston 13 constitute a structure similar to a linear motor. The coil 14 can be understood as the stator of the linear motor, and the piston 13 can be understood as the mover of the linear motor. When the coil 14 is energized, a magnetic field can be generated to move the piston 13 and push the piston rod 15 to move, or when the piston rod 15 pushes the piston 13 to move, the coil 14 can induce the change of the magnetic field to generate current. In some embodiments, for example, a first connecting pin 16 is provided at one end of the piston rod 15 extending out of the cylindrical housing 11, and a second connecting pin 17 is provided at the second end 112 of the cylindrical housing 11. The hybrid suspension actuator 10 can be connected to the vehicle body and the wheel through the first connecting pin 16 and the first connecting pin 17, respectively. Specifically, the first connecting pin 16 is connected to the vehicle body, and the second connecting pin 17 is connected to the wheel.

By controlling the coil 14, multiple working modes such as electromagnetic energy feeding (electromagnetic semi-active), electromagnetic active and hydraulic passive can be realized. The working principle of the hybrid suspension actuator 10 provided by the present invention is as follows: the damping liquid is filled in the inner cavity of the cylinder 12, and the damping liquid can be selected from commonly used hydraulic oil, for example. When the piston 13 slides, the damping liquid can be circulated and exchanged in the first inner cavity 121 and the second inner cavity 122 through the gap between the piston 13 and the inner wall of the cylinder 12. For example, a nitrogen chamber is also provided at the second end 112 of the cylindrical shell 11 to achieve pressure compensation and volume compensation in the cylinder 12, which can be set with reference to the structure of the nitrogen chamber in the existing hydraulic damping vibration reduction technology. When the coil 13 fails or does not work, the hybrid suspension actuator 10 is in a hydraulic passive mode, and the damping liquid provides hydraulic damping to hinder the movement of the piston 13, that is, to hinder the relative displacement between the vehicle body and the wheel. When the hybrid suspension actuator 10 is in the electromagnetic energy feeding mode, the coil 14 is in a power generation state, for example. For example, when the piston 13 moves, the coil 14 generates an induced current, and the generated electrical energy can be stored for subsequent use. At this time, the damping fluid provides hydraulic damping while also generating electromagnetic damping in the same direction as the hydraulic damping. The hydraulic damping and electromagnetic damping are superimposed to hinder the relative displacement of the vehicle body and the wheel. When the hybrid suspension actuator 10 is in the electromagnetic active mode, the coil 14 is, for example, in the working state - electric/generating mode, and switches between the electric and generating modes according to the working conditions. In the electric mode, by energizing the coil 14 to control the movement of the piston 13, the hydraulic damping force can be overcome or offset when encountering uneven road surfaces, generating a driving force to extend or retract the wheel, thereby improving driving comfort.

The working states of the coil 14 corresponding to the above working modes are shown in the following table:

Coil Damping fluid Actuator working mode Not working or failed Work Fluid Passive Work (power generation) Work Electromagnetic energy feeding (electromagnetic semi-active) Work (power generation/electricity) Work Electromagnetic Active

In this embodiment, by directly making the piston 13 into a permanent magnet, the hydraulic vibration reduction and the electromagnetic vibration reduction are integrated into one. For the hybrid suspension actuator 10 shown in FIG1 , the outer diameter of the cylindrical shell 11 is about 100 mm, the inner diameter of the cylinder 12 is about 45 mm, the total length of the piston 13 from the first end 111 to the second end 112 is about 163 mm, the length of the cylindrical shell 11 from the first end 111 to the second end 112 can be about 344 mm, and the length from the end of the piston rod 15 to the second end 112 can be about 506 mm. It can be seen that the hybrid suspension actuator 10 provided in this embodiment only needs to occupy the length of a cylinder to achieve a faster response speed and a variety of working modes, which greatly reduces the size and has a more compact structure.

In one embodiment, the hybrid suspension actuator 10 is further provided with a throttling channel, which connects the first inner cavity 121 and the second inner cavity 122 respectively. For example, a small hole penetrating from the first end 111 to the second end 112 can be provided on the piston 13 to connect the first inner cavity 121 and the second inner cavity 122, so that the damping fluid can circulate and exchange between the first inner cavity 121 and the second inner cavity 122 through the penetrating small hole. Or, for example, the piston rod 15 is set as a hollow piston rod, and the piston 13 is selected as an annular magnet. The piston 13 is sleeved on the piston rod 15. A throttling hole 151 is provided on the piston rod 15. As shown in FIG. 1, the throttling hole 151 is located between the piston 13 and the first end 111 and can be arranged adjacent to the piston 13. The hybrid suspension actuator 10 is connected to the first inner cavity 121 and the second inner cavity 122 through the hollow piston rod. For example, as shown in FIG. 1 , the first inner cavity 121 is located on the side of the cylinder 12 close to the first end 111, and the second inner cavity 122 is located on the side of the cylinder 12 close to the second end 112. When the piston 13 moves toward the first end 111, the damping fluid in the first inner cavity 121 can enter the hollow cavity of the piston rod 15 through the throttle hole 151, and enter the second inner cavity 122 from the end of the piston 13 close to the second end 112. Alternatively, when the piston 13 moves toward the second end 112, the damping fluid in the second inner cavity 122 can enter the hollow cavity from the end of the piston rod 15 close to the second end 112, and flow out from the throttle hole 151 to the first inner cavity 121.

In one embodiment, the hybrid suspension actuator 10 is also provided with a position sensor to sense the relative position change between the vehicle body and the wheel. The position sensor may be, for example, a Hall position sensor, which is provided between the tubular housing 11 and the cylinder 12, and senses the moving distance of the piston 13 relative to the cylinder 12 by sensing the change in the magnetic field, so as to determine the change in the distance between the vehicle body and the wheel. Or, for example, it may be a photoelectric position sensor, which may be provided on the tubular housing 11 or on the end of the piston rod 15 away from the piston 13, and senses the change in the distance between the vehicle body and the wheel by sensing the relative position change between the tubular housing 11 and the piston rod 15. For example, the second end 112 is the side connected to the wheel, and the end of the piston rod 15 away from the piston 13 is the side connected to the vehicle body. The photoelectric position sensor is provided on the barrel of the tubular housing 11 or on the first end 111, and the change in the distance between the first end 111 and the vehicle body can be sensed. The photoelectric position sensor is provided on the piston rod 15 to sense the change in the distance between the end of the piston rod 15 and the first end 111. The position sensor is connected to an external control system, and the working mode can be selected according to the collected data.

Furthermore, an embodiment of the present invention provides a suspension system, as shown in FIG2 , the suspension system includes any one of the hybrid suspension actuators 10 described in the above embodiments, a control terminal 21, a drive and energy storage control circuit 22, and a power supply assembly 23. The drive and energy storage control circuit 22 is respectively connected to the control terminal 21 and the coil 14 of the hybrid suspension actuator 10. The control terminal 21 is used to issue a control instruction, and the drive and energy storage control circuit 22 is used to respond to the control instruction of the control terminal 21 to energize the coil 14 to drive the piston 13 to move. Or the drive and energy storage control circuit 22 collects the current generated by the coil 14 in response to the movement of the piston 13. The power supply assembly 23 is electrically connected to the drive and energy storage control circuit 22, and is used to provide the current required by the drive and energy storage control circuit 22, or to store the current collected by the drive and energy storage control circuit 22. The control terminal 21 is, for example, an on-board computer ECU (Electronic Control Unit), and the power supply assembly 23 is, for example, an on-board power supply, which can reuse the components of the vehicle itself well and reduce the number of components in the vehicle. Of course, in some embodiments, the control terminal 21 and the power supply assembly 23 may also be components on the vehicle that are independent of the on-board computer and the on-board power supply.

In some embodiments, the suspension system further includes a sensor component 24, which is electrically connected to the control terminal 21 and is used to detect the working environment data of the hybrid suspension actuator 10 and transmit it to the control terminal 21. Specifically, for example, when applied to a vehicle, the two ends of the hybrid suspension actuator 10 are connected to the vehicle body and the wheel respectively, and the sensor component 24 is used to detect the acceleration, relative displacement, damping force, tire load on the ground, road conditions, current and voltage between the wheel and the vehicle body as working environment data and transmit them to the control terminal 21. The sensor component 24 may include sensors such as acceleration sensors, displacement sensors, pressure sensors, current and voltage sensors, and also includes a data acquisition module that converts these sensor signals into data. The collected data can be transmitted to the control terminal 21, and the control terminal 21 analyzes and judges these data and outputs corresponding control instructions to the drive and energy storage control circuit 22 according to the preset control strategy to realize intelligent control of the hybrid suspension actuator 10. It should be noted that the suspension system provided in this embodiment can also be applied to vibration reduction of bridges or other buildings other than vehicles, so this embodiment does not limit the control terminal 21, power supply component 23 and sensor component 24 to the above-mentioned example forms.

In some embodiments, the suspension system further includes a suspension spring 25 , which is arranged in parallel with the hybrid suspension actuator 10 or is sleeved on the hybrid suspension actuator 10 to further achieve buffering and vibration reduction.

On the other hand, an embodiment of the present invention further provides an automobile, which includes the hybrid suspension actuator described in any of the above embodiments or the suspension system described in any of the above embodiments, and also includes wheels and a body, wherein the wheels are connected to the second end 112 of the cylindrical housing 11, and the body is connected to the end of the piston rod 15 away from the piston 13. The automobile provided in this embodiment has the same beneficial effects as the hybrid suspension actuator 10 described above, which will not be repeated here.

The hybrid suspension actuator 10 provided in the embodiment of the present invention sets the piston 13 in the cylinder 12 as a permanent magnet, and cooperates with the coil 14 to form a structure similar to a linear motor, integrating electromagnetic vibration reduction and hydraulic vibration reduction, with a more compact structure and higher reliability. Further, in the suspension system, the hybrid suspension actuator 10 is combined with the control terminal 21, the drive and energy storage control circuit 22 and the power supply component 23, so as to realize the selection and control of more than 10 working modes of the hybrid suspension actuator 10, and even realize the intelligent control effect, so as to achieve the goals of smoothness of vehicle driving, handling stability, etc.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A hybrid suspension actuator, comprising: A cylindrical housing (11) having a first end (111) and a second end (112) opposite to each other; A cylinder (12) fixed in the cylindrical housing (11); A piston (13) which divides the inner cavity of the cylinder (12) into a first inner cavity (121) and a second inner cavity (122) which are opposite to each other in the direction from the first end (111) to the second end (112), and the piston (13) can move relative to the cylinder (12) in the direction from the first end (111) to the second end (112); the piston (13) is a permanent magnet; A coil (14) is disposed between the cylindrical housing (11) and the cylinder (12) and is inductively coupled to the piston (13); A piston rod (15), one end of which extends out of the first end (111) of the cylindrical housing (11) through the cylinder (12), and the other end of which is connected to the piston (13); A first connecting pin (16) connected to an end of the piston rod (15) away from the piston (13); A second connecting pin (17) is connected to the second end (112) of the cylindrical housing (11). 2. The hybrid suspension actuator according to claim 1, further comprising: a throttling channel, respectively communicating with the first inner cavity (121) and the second inner cavity (122). 3. The hybrid suspension actuator according to claim 1 is characterized in that the piston rod (15) is a hollow piston rod; the piston (13) is an annular magnet, and the piston (13) is sleeved on the piston rod (15); a throttle hole (151) is provided on the piston rod (15), and the throttle hole (151) is located between the piston (13) and the first end (111) and is arranged adjacent to the piston (13); the hybrid suspension actuator connects the first inner cavity (121) and the second inner cavity (122) through the hollow piston rod. 4. The hybrid suspension actuator according to claim 1 is characterized in that it also includes a Hall position sensor, which is arranged between the cylindrical housing (11) and the cylinder (12) and is used to sense the relative position change between the piston (13) and the cylinder (12). 5. The hybrid suspension actuator according to claim 1 is characterized in that it also includes a photoelectric position sensor, which is arranged on the cylindrical shell (11) or on the end of the piston rod (15) away from the piston (13) and is used to sense the relative position change between the cylindrical shell (11) and the piston rod (15). 6. A suspension system, comprising: A hybrid suspension actuator as claimed in any one of claims 1 to 5; Control terminal (21); a drive and energy storage control circuit (22) electrically connected to the control terminal (21) and the coil (14) of the hybrid suspension actuator; the drive and energy storage control circuit (22) supplies electricity to the coil (14) in response to a control instruction of the control terminal (21) to drive the piston (13) to move, or collects current generated by the coil (14) in response to the movement of the piston (13); A power supply component (23) is electrically connected to the driving and energy storage control circuit (22). 7. The suspension system according to claim 6, characterized in that it also includes: a sensor component (24), electrically connected to the control terminal (21), used to detect the working environment data of the hybrid suspension actuator and transmit it to the control terminal (21). 8. The suspension system according to claim 6, characterized in that it also includes: a suspension spring (25), wherein the suspension spring (25) is arranged in parallel with the hybrid suspension actuator or the suspension spring (25) is sleeved outside the hybrid suspension actuator. 9. The suspension system according to claim 6, characterized in that the control terminal (21) is a driving computer, and the power supply component (23) is a vehicle-mounted power supply. 10. An automobile, comprising a hybrid suspension actuator as described in any one of claims 1 to 5 or a suspension system as described in any one of claims 6 to 9, and also comprising wheels and a body, wherein the wheels are connected to the second end (112) of the cylindrical shell (11), and the body is connected to the end of the piston rod (15) away from the piston (13).