CN112688531A - Voice coil motor active suspension - Google Patents
Voice coil motor active suspension Download PDFInfo
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- CN112688531A CN112688531A CN202011506764.XA CN202011506764A CN112688531A CN 112688531 A CN112688531 A CN 112688531A CN 202011506764 A CN202011506764 A CN 202011506764A CN 112688531 A CN112688531 A CN 112688531A
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- voice coil
- coil motor
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- suspension
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Abstract
The invention discloses an active suspension of a voice coil motor, which relates to the technical field of vehicle suspension vibration reduction and comprises a suspension shell part, a passive vibration reduction loop part and an active vibration reduction loop part; the passive damping loop component and the active damping loop component are both disposed within the suspended housing portion, and the passive damping loop component is disposed between the active damping loop component and the suspended housing portion; the top of the passive damping loop component and the top of the active damping loop component are both connected to the load end of the suspended enclosure portion. The voice coil motor can be actively controlled to generate exciting force according to real-time working conditions so as to offset vibration interference, high vibration reduction efficiency is achieved, and the method is suitable for vibration reduction of a vehicle suspension system with high requirements on comfort and stability.
Description
Technical Field
The invention relates to the technical field of vehicle suspension vibration reduction, in particular to a voice coil motor active suspension.
Background
Currently, in the field of vehicle manufacturing, there is an increasing demand for improved comfort and stability of vehicles, and thus the requirement for isolation of vehicle vibrations is also becoming more stringent. In order to quickly attenuate the vibration of the frame and the vehicle body and improve the smoothness and comfort of vehicle running, the connection of the vehicle generally passes through a suspension system, and the working quality of the suspension system directly influences the comfort and the stability of the running of the vehicle and the service life of other components.
At present, the suspension vibration damper of a vehicle mainly comprises a rubber suspension, a hydraulic suspension, an air spring suspension and the like, wherein the rubber suspension has a simple structure and low cost, but the high-frequency hardening is obvious, and the vibration isolation performance is limited. The hydraulic mount can obtain high frequency low rigidity, weaken high frequency hardening to a certain extent, but the structure is complicated, and the sealing requirement is higher. The air spring suspension has lower natural frequency, better adaptability and universality to different road surfaces and lower vibration noise per se during working, but the air spring suspension also has the problems of high requirements on sealing performance and machining and mounting precision.
The active suspension can follow the real-time working condition of an engine, vibration signals collected by the acceleration sensor are analyzed and calculated by the controller, and then the actuator is controlled to generate exciting force to counteract the vibration from the power assembly, so that the vibration is inhibited from being transmitted to a vehicle body, and the riding comfort is influenced.
The voice coil motor belongs to a special linear motor, has the excellent performances of simple structure, small volume, low noise, large acceleration, high response speed and the like, converts electric energy into linear or rotary motion without an intermediate conversion mechanism, and meets the requirement of an active suspension actuator.
Chinese patent document CN107399228A provides a power assembly active mount, which can improve the problem of power assembly vibration of traditional internal combustion engine automobiles and hybrid electric vehicles in a wide frequency range, and improve the comfort of the whole vehicle.
Disclosure of Invention
In order to solve the technical problems, the invention provides the voice coil motor active suspension which is compact in structure, can follow the real-time working condition of an engine, collects signals of a vibration source by an acceleration sensor, transmits the signals to an active controller for control calculation, and counteracts the vibration generated by the voice coil motor and the vibration from a power assembly, so that the vibration is inhibited from being transmitted to a vehicle body, and the riding comfort is improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an active suspension of a voice coil motor, which comprises a suspension shell part, a passive vibration damping loop part and an active vibration damping loop part, wherein the passive vibration damping loop part is arranged on the suspension shell part; the passive damping loop component and the active damping loop component are both disposed within the suspended housing portion, and the passive damping loop component is disposed between the active damping loop component and the suspended housing portion; the top of the passive damping loop component and the top of the active damping loop component are both connected to the load end of the suspended enclosure portion.
Optionally, the suspension housing portion includes a flange cover, a flange housing, and the load end, the flange cover is disposed on the upper portion of the flange housing, the flange cover and the flange housing are connected to the vehicle body frame, the load end is disposed on the top portion inside the flange cover, and one end of a load beam of the load end extends out of the flange cover.
Optionally, the passive damping loop component includes a connecting rod, a spring end and a coil spring; one end of the connecting rod is connected with the load end, the other end of the connecting rod is connected with the spring end, and the spiral spring is arranged below the spring end.
Optionally, the passive damping loop component includes three connecting rods, and the three connecting rods are uniformly arranged below the load end.
Optionally, the bottom of the suspension housing part is provided with a ring groove, and the bottom of the coil spring is arranged in the ring groove.
Optionally, the bottom of the spring end is provided with a limiting groove, and the top of the spiral spring extends into the limiting groove.
Optionally, the active damping loop component includes a voice coil motor and a motor output shaft; the voice coil motor is arranged at the bottom in the suspended shell part, the motor output shaft is arranged at the top of the voice coil motor, and the motor output shaft is connected with the middle of the load end.
Optionally, the active damping loop component further includes a diaphragm spring, an edge of the diaphragm spring is connected to the suspension housing portion, and a middle portion of the diaphragm spring is connected to the motor output shaft.
Optionally, the active damping loop component further includes a flexible hinge, and the flexible hinge is disposed between the output shaft of the motor and the middle of the load end.
Optionally, the bottom of the voice coil motor is connected to the suspension housing portion by screws.
Compared with the prior art, the invention has the following technical effects:
the voice coil motor active suspension can actively control the voice coil motor to generate exciting force according to real-time working conditions so as to offset vibration interference, achieves high vibration reduction efficiency, and is suitable for vibration reduction of a vehicle suspension system with high requirements on comfort and stability. Specifically, the invention has the following technical characteristics:
(1) the coil spring is used as a passive vibration damping element and the voice coil motor is used as an active vibration damping element which are connected in parallel to form an active and passive composite vibration damping technology, so that the natural frequency and the resonance peak value of a system can be reduced, the high attenuation of high-frequency vibration is ensured, and vibration isolation and noise reduction of a wider frequency band are realized;
(2) the coil spring is sleeved outside the voice coil motor, so that the installation space is greatly saved under the condition that the passive vibration damping loop and the active vibration damping loop are not interfered, and the whole suspension system is simple and compact in structure;
(3) the diaphragm spring is matched with the motor output shaft, and has the characteristics of low axial stiffness and high radial stiffness. The high radial stiffness diaphragm spring can ensure that the rotor of the voice coil motor is installed in a centering manner, and can also prevent the problem that the rotor of the voice coil motor is not centered due to the eccentric load. Meanwhile, the axial rigidity is low, the axial stroke of the voice coil motor can be effectively released, and the phenomenon that the voice coil motor cannot move and generates movement deformation due to overlarge rigidity is prevented; the excitation force generated by the voice coil motor can be sufficiently transmitted to a load end, and meanwhile, the position of a rotor coil of the voice coil motor is restrained on the central axis, so that the mounting mode of the active suspension of the voice coil motor becomes more flexible, the active suspension can be obliquely mounted at a certain included angle with the vertical direction, and the load in the horizontal direction can be borne;
(4) the flexible hinge is used for connecting the output shaft of the motor with the load end, adopts a double-bending form and has the characteristics of high axial rigidity and radial low bending rigidity. The high axial rigidity can ensure that the displacement and force of the rotor of the voice coil motor are not lost and transmitted after moving, the low radial bending rigidity can compensate the eccentricity introduced after the load is eccentric, and meanwhile, the transmission of the axial movement is not lost. The flexible hinge can ensure that the axial exciting force generated by the voice coil motor is fully transmitted, meanwhile, the displacement in other directions is compensated, compared with a spherical hinge, the flexible hinge overcomes the defects that a clearance and friction exist between kinematic pairs of the flexible hinge, so that the defects of phase difference and stroke caused by the clearance and extra damping caused by the friction are overcome, and the introduction of the damping increases the equivalent damping of a system, so that the high-frequency vibration damping performance of the system is reduced.
(5) The double-bending flexible hinge is matched with the diaphragm spring, so that the axial movement force of the voice coil motor is not influenced, and simultaneously, the eccentric error introduced after the load eccentric installation is ingeniously compensated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an active suspension support of a voice coil motor according to the present invention;
FIG. 2 is a three-dimensional structure diagram of the active suspension of the voice coil motor according to the present invention;
FIG. 3 is a cross-sectional view of an active suspension of a voice coil motor according to the present invention;
FIG. 4 is a three-dimensional structure diagram of the active suspension (with the flange housing and the flange cover removed) of the voice coil motor provided in the present invention
FIG. 5 is a three-dimensional structure diagram of an active suspension diaphragm spring of a voice coil motor according to the present invention;
FIG. 6 is a three-dimensional structure diagram of an active suspension flexible hinge of a voice coil motor according to the present invention;
fig. 7 is a three-dimensional structure diagram of the active suspension load end of the voice coil motor provided by the present invention;
fig. 8 is a three-dimensional structure diagram of the active suspension spring end of the voice coil motor provided in the present invention;
fig. 9 is a three-dimensional structure diagram of an output shaft of an active suspension motor of a voice coil motor provided by the present invention;
FIG. 10 is a three-dimensional structural diagram of an active suspension flange cover of a voice coil motor according to the present invention;
fig. 11 is a three-dimensional structural diagram of an active suspension flange housing of a voice coil motor provided in the present invention;
FIG. 12(a) is a schematic diagram illustrating the damping principle of a conventional passive suspension system;
FIG. 12(b) is a schematic diagram of the active suspension damping principle of the voice coil motor according to the present invention;
fig. 13 is a graph comparing the transfer rate curves of the conventional passive suspension system and the present invention in the case of passive and active passive combination.
Description of reference numerals: 1. a load end; 2. a flange cover; 3. a flexible hinge; 4. a connecting rod; 5. a diaphragm spring; 6. an output shaft of the motor; 7. a spring end; 8. a voice coil motor; 9. a coil spring; 10. a flange housing; 11. an engine power assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram of a voice coil motor active suspension provided by the present invention for a tilt mounting support in a vehicle powertrain damping. As shown in fig. 2 to 11, the present embodiment provides a voice coil motor active suspension including a suspension housing portion, a passive damping loop member, and an active damping loop member; the passive damping loop component and the active damping loop component are both disposed within the suspended housing portion, and the passive damping loop component is disposed between the active damping loop component and the suspended housing portion; the top of the passive damping loop component and the top of the active damping loop component are both connected to the load end of the suspended enclosure portion.
In this embodiment, the suspension housing portion includes a flange housing 10, a flange cover 2 and a load end 1, and the suspension housing portion is used for accommodating the active damping loop component and the passive damping loop component, so that the suspension structure is simple and compact, and is convenient to assemble and disassemble. The flange shell 10 and the flange cover 2 are fixedly connected with a vehicle body frame through three bolts with the circumferences separated by 120 degrees, one end of a load-bearing beam of the load end 1 extends out of the flange cover 2 through a rectangular hole in the upper part of the flange cover, a load end boss and a rectangular hole in the flange cover are designed into rectangles, and the load end boss and the rectangular hole in the flange cover are matched with each other to form an obvious gap, so that the load end is ensured to have a certain radial displacement, and the load end can be prevented from excessively rotating around the axial direction.
The passive damping loop components, including the coil spring 9, the spring end 7 and the three connecting rods 4, serve to dampen vibrations from the power assembly and provide suitable static stiffness to support the engine. The coil spring 9 is sleeved outside the voice coil motor 8, the parallel arrangement mode can well avoid occupying a large space position, the compactness of the suspension structure is realized, the coil spring 9 is positioned in the annular groove at the bottom of the flange shell 10 and the limiting groove of the spring end 7, the radial movement of the coil spring in the suspension system can be prevented, and the coil spring 9 and the voice coil motor 8 are ensured to be coaxial. The three connecting rods are distributed along the circumference at 120 degrees, penetrate through three corresponding holes of the diaphragm spring 5 and are connected with the spring end 7 through countersunk screws, and the other ends of the connecting rods are also connected with the load end 1 through the countersunk screws. The connecting rod has obvious clearance with the diaphragm spring hole which passes through the connecting rod, which helps to avoid interference between the two elements in the damping process, generates movement coupling and influences the damping efficiency. For the whole passive vibration damping loop component, the whole transmission path of the elastic force of the spiral spring is the spiral spring 9, the spring end 7, the connecting rod 4 and the load end 1 in sequence, and passive vibration damping in the vibration damping process is realized.
The active vibration reduction loop component comprises a voice coil motor 8, a motor output shaft 6, a diaphragm spring 5 and a flexible hinge 3, and is used for actively controlling the voice coil motor to generate corresponding exciting force to counteract vibration of the vehicle body according to vibration signals collected by the sensor, so that efficient vibration reduction is realized. The voice coil motor 8 belongs to a special linear motor and has the advantages of simple structure, small volume, low noise, high response speed and the like. The voice coil motor 8 comprises a rotor part and a stator part, and the rotor of the voice coil motor can be controlled to do linear motion in the stator through the controller. The stator part of the voice coil motor 8 is connected to the bottom of the flange housing 10 through screws, and the upper end of the mover of the voice coil motor 8 is connected to the motor output shaft 6 through screws. The shaft end with threads at the top of the motor output shaft 6 passes through the center hole of the diaphragm spring 5 to be connected with one end of the flexible hinge 3 with threads, and the shaft end with threads of the flexible hinge 3 is connected with the threads at the center of the load end 1. The diaphragm spring 5 is fixed through the matching of the flange shell 10 and the flange cover 2, the diaphragm spring is an elastic element with a special structure, and can realize axial low rigidity and radial high rigidity, the diaphragm spring realizes the axial low rigidity and the radial high rigidity through the circular arc long and narrow through hole, in the process of matching with the motor output shaft 6 of the voice coil motor 8, the lower rigidity in the axial direction ensures that the exciting force generated by the voice coil motor 8 can be fully transmitted to the load end 1, and the high rigidity in the radial direction ensures that the voice coil motor rotor and the voice coil motor stator are coaxial, so that the rotor is prevented from contacting with the stator, the normal work of the voice coil motor 8 is influenced, and the service life of the voice coil motor 8 is even shortened. The motor output shaft 6 is connected with the load end 1 through the flexible hinge 3, so that the transmission of the exciting force is realized. The flexible hinge 3 can provide higher axial rigidity and lower bending rigidity, can ensure that the axial excitation force generated by the voice coil motor 8 is sufficiently transmitted, and simultaneously compensates displacement in other directions. For the whole active vibration reduction loop component, the whole transmission path of the excitation force generated by the voice coil motor 8 is sequentially the voice coil motor 8, the motor output shaft 6, the diaphragm spring 5, the flexible hinge 3 and the load end 1, so that active vibration reduction in the vibration reduction process is realized.
As shown in fig. 12(a), the conventional passive suspension system is constructed by a spring-mass-damping unit, and realizes simple passive vibration isolation, where M is the mass of the powertrain platform, k is the equivalent stiffness between the powertrain platform and the frame platform, and c is the equivalent damping of the system.
As shown in fig. 12(b), compared with the conventional passive suspension system, the passive suspension system adds a complete active feedback control loop, and the feedback control loop adopts the modes of sensor feedback, controller calculation and actuator output to operate, so as to form an active and passive compound damping mechanism. M is the mass of the power assembly platform, K is the equivalent stiffness of the suspension system of the invention, and C is the equivalent damping of the suspension system of the invention.
Fig. 13 is a graph showing the transfer rate of the conventional passive suspension system of fig. 12(a) and 12(b) and the active suspension of the voice coil motor of the present invention under the passive and active-passive hybrid conditions. It can be seen from the figure that the design of the active and passive composite vibration damping of the invention enables the rigidity of the system to be reduced, the natural frequency to move forward, and meanwhile, the resonance peak of the system is also compensated by the actively controlled skyhook damping.
It should be noted that, as is apparent to those skilled in the art, the invention is not limited to the details of the above-described exemplary embodiments, and can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above description of the examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The active suspension of the voice coil motor is characterized by comprising a suspension shell part, a passive damping loop part and an active damping loop part; the passive damping loop component and the active damping loop component are both disposed within the suspended housing portion, and the passive damping loop component is disposed between the active damping loop component and the suspended housing portion; the top of the passive damping loop component and the top of the active damping loop component are both connected to the load end of the suspended enclosure portion.
2. The voice coil motor active suspension of claim 1, wherein the suspension housing portion comprises a flange cover, a flange housing and the load end, the flange cover is disposed on the upper portion of the flange housing, the flange cover and the flange housing are connected with a vehicle body frame, the load end is disposed on the inner top portion of the flange cover, and one end of the load beam of the load end extends out of the flange cover.
3. The voice coil motor active suspension of claim 1, wherein the passive damping loop component comprises a connecting rod, a spring end, and a coil spring; one end of the connecting rod is connected with the load end, the other end of the connecting rod is connected with the spring end, and the spiral spring is arranged below the spring end.
4. The voice coil motor active suspension of claim 3, wherein the passive damping loop component comprises three connecting rods, the three connecting rods being uniformly disposed below the load end.
5. The voice coil motor active suspension of claim 3, wherein an annular groove is disposed at a bottom portion of the suspension housing portion, and wherein a bottom portion of the coil spring is disposed in the annular groove.
6. The voice coil motor active suspension of claim 3, wherein a bottom of the spring end is provided with a limiting groove, and a top of the coil spring extends into the limiting groove.
7. The voice coil motor active suspension of claim 1, wherein the active damping loop component comprises a voice coil motor and a motor output shaft; the voice coil motor is arranged at the bottom in the suspended shell part, the motor output shaft is arranged at the top of the voice coil motor, and the motor output shaft is connected with the middle of the load end.
8. The voice coil motor active suspension of claim 7, wherein the active damping loop component further comprises a diaphragm spring, an edge of the diaphragm spring is connected to the suspension housing portion, and a middle portion of the diaphragm spring is connected to the motor output shaft.
9. The voice coil motor active suspension of claim 7, wherein the active damping loop component further comprises a flexible hinge disposed between the motor output shaft and a middle of the load end.
10. The voice coil motor active suspension of claim 7, wherein the bottom of the voice coil motor is connected to the suspension housing portion by screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506764.XA CN112688531A (en) | 2020-12-18 | 2020-12-18 | Voice coil motor active suspension |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506764.XA CN112688531A (en) | 2020-12-18 | 2020-12-18 | Voice coil motor active suspension |
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| CN112688531A true CN112688531A (en) | 2021-04-20 |
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| CN202011506764.XA Pending CN112688531A (en) | 2020-12-18 | 2020-12-18 | Voice coil motor active suspension |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877012A (en) * | 2022-05-19 | 2022-08-09 | 上海大学 | Self-balancing active and passive vibration damper |
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Application publication date: 20210420 |