JP2017218041A - Unsprung vibration control device and suspension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unsprung vibration control device that can utilize kinetic energy of a weight of a dynamic damper, and to provide a suspension device.SOLUTION: An unsprung vibration control device includes: a dynamic damper 10 having a weight 7 and an elastic member 8 for elastically supporting the weight 7 and connected to an unsprung member L; and a linear motor 11 capable of driving the weight 7 and generating electric power. The linear motor 11 includes: a rod 6 having one end connected to the unsprung member L; a field 60 held to the rod 6; and a coil 70 held to the weight 7 and facing the field 60.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an unsprung vibration control device and a suspension device.

  2. Description of the Related Art Conventionally, there is a vehicle suspension device that attaches a dynamic damper to an unsprung member to dampen the unsprung member. Such a dynamic damper includes a weight serving as an additional mass, and can suppress the vibration of the unsprung member by applying the inertial force of the weight as a reaction force when the unsprung member vibrates. Further, the dynamic damper is provided with a damping element such as a hydraulic damper that exhibits a damping force for suppressing the vibration of the weight, and the dynamic damper is used for vibration of the resonance frequency of the unsprung member and the frequency in the surrounding area. It can be suppressed.

JP 2005-104324 A

  However, in the above suspension device, the kinetic energy generated when the weight of the dynamic damper vibrates is converted into thermal energy by the damping element, and is discarded without being used and is not effectively used.

  Accordingly, an object of the present invention is to provide an unsprung vibration control device and a suspension device that can utilize the kinetic energy of a weight that has not been used.

  The unsprung vibration control device according to claim 1, which solves the above problem, includes a linear motor capable of driving a weight of a dynamic damper coupled to an unsprung member and capable of generating power. A rod having one end connected to the unsprung member, a field held by the rod, and a coil held by the weight and facing the field. For this reason, it is possible to convert the kinetic energy of the weight into electrical energy that can be easily used.

  The unsprung vibration control device according to claim 2 includes the configuration according to claim 1, the linear motor includes a core on which the coil is mounted, and the weight includes the core. ing. For this reason, while being able to suppress the increase in vehicle weight, the number of parts can be reduced and the unsprung vibration control apparatus can be reduced in size, and the cost can be reduced.

  An unsprung vibration control device according to a third aspect is provided for the linear motor having the configuration according to the first or second aspect, storing electric power generated by the linear motor and capable of supplying electric power to the linear motor. The power storage device is provided, and the weight includes the linear motor power storage device. For this reason, while being able to suppress the increase in vehicle weight, the number of parts can be reduced and the unsprung vibration control apparatus can be reduced in size, and the cost can be reduced.

  According to a fourth aspect of the present invention, there is provided a suspension device according to any one of the first to third aspects, in a direction that suppresses or promotes relative displacement between the sprung member and the unsprung member in a vehicle. An actuator that exerts thrust, and power can be supplied from the linear motor to the actuator. For this reason, the electric power generated by the linear motor can be used also by the actuator, and the generated electric power can be used effectively.

  According to a fifth aspect of the present invention, there is provided a suspension device according to any one of the first to third aspects, in a direction that suppresses or promotes relative displacement between the sprung member and the unsprung member in the vehicle. It includes at least one of an actuator that exerts thrust and a damper that exerts a damping force that suppresses relative displacement between the sprung member and the unsprung member. One or both of the actuator and the damper is connected to the other end of the rod via a link. For this reason, it is possible to easily secure the mounting space for the unsprung vibration control device, the actuator, and the damper.

  According to the unsprung vibration control device and the suspension device of the present invention, the kinetic energy of the weight can be utilized.

It is the front view which simplified and showed the state which attached the suspension apparatus provided with the unsprung-vibration control apparatus which concerns on one embodiment of this invention to the vehicle, and was partially cut away. It is the longitudinal cross-sectional view which expanded and showed a part of unsprung vibration control apparatus which concerns on one embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. The same reference numerals used throughout the several drawings indicate the same parts.

  As shown in FIG. 1, an unsprung vibration control device 1 according to an embodiment of the present invention is used in a suspension device A mounted on a vehicle V such as a four-wheeled vehicle. In the following description, the upper and lower sides of the suspension device A attached to the vehicle V are simply referred to as “upper” and “lower” unless otherwise specified.

  Specifically, the suspension device A is attached to a vehicle body B so as to be swingable and supports a wheel W so as to be movable up and down, and a link member 2 is interposed between the arm w1 and the vehicle body B. Suspension springs 3 and hydraulic dampers 4, various sensors (not shown) for detecting the state of the vehicle V such as vertical acceleration and vertical speed of the sprung member U and unsprung member L of the vehicle V; The relative displacement control device 5 that controls the relative displacement in the vertical direction of the sprung member U and the unsprung member L based on the information obtained by these sensors, and the unsprung member L of the unsprung member L based on the information obtained by the sensors. The unsprung vibration control device 1 for controlling vibration is provided.

  The link member 2 includes a rod 6 that is swingably connected to the arm w1 and extends obliquely upward from the arm w1 toward the vehicle body B, and a locking arm 20 that is swingably connected to the rod 6 and the vehicle body B. Prepare. The locking arm 20 has an arm portion 20a extending in the vehicle width direction of the vehicle V. The upper end of the rod 6 is rotatably connected to the left end of the arm portion 20a in FIG. 1, and the hydraulic damper 4 rotates to the right end. Connected as possible. The rod 6 is also a component of the unsprung vibration control device 1 and will be described in detail later.

  The hydraulic damper 4 includes an outer cylinder 40 that is swingably connected to the vehicle body B, a rod 41 that is swingably connected to the arm portion 20a and enters and exits the outer cylinder 40, and an outer cylinder that is held by the rod 41 and held by the rod 41. A piston (not shown) that separates the two chambers formed in the chamber 40 and a damping passage (not shown) that communicates the two chambers and provides resistance to the flow of liquid flowing back and forth between the chambers. When the rod 41 moves in and out of the outer cylinder 40 and the hydraulic damper 4 expands and contracts, the piston moves in the outer cylinder 40 and the liquid passes through the damping passage. As a result, the differential pressure generated in the two chambers is generated by the piston. A damping force is generated that acts on the surface and hinders expansion and contraction.

  The suspension spring 3 is a coil spring, and is interposed between the outer cylinder 40 and the rod 41 on the outer periphery of the hydraulic damper 4. For this reason, when the hydraulic damper 4 expands and contracts, the suspension spring 3 also expands and contracts accordingly, and the suspension spring 3 exhibits an elastic force corresponding to the compression amount.

  According to the above configuration, when the wheel W moves upward with respect to the vehicle body B, the arm w1 rotates clockwise in FIG. Then, the rod 6 of the link member 2 is pushed upward in FIG. 1, the locking arm 20 rotates clockwise in FIG. 1, the hydraulic damper 4 contracts, and the suspension spring 3 is compressed. On the contrary, when the wheel W moves downward with respect to the vehicle body B, the arm w1 rotates counterclockwise in FIG. Then, the rod 6 of the link member 2 is pulled downward in FIG. 1, the locking arm 20 rotates counterclockwise in FIG. 1, the hydraulic damper 4 extends, and the suspension spring 3 extends.

  When the suspension spring 3 and the hydraulic damper 4 expand and contract in this way, the suspension spring 3 exhibits an elastic force commensurate with the amount of compression, and the hydraulic damper 4 exhibits a damping force so that the sprung member U and the unsprung member. The relative displacement in the vertical direction of L is suppressed. Further, the suspension spring 3 urges the locking arm 20 in the direction of rotating the locking arm 20 counterclockwise in FIG. 1 by its elastic force. That is, since the elastic force of the suspension spring 3 acts in a direction in which the vehicle body B is separated upward from the wheel W, the vehicle body B can be elastically supported by the suspension spring 3. In the vehicle V, the member including the vehicle body B supported by the suspension spring 3, the suspension member (not shown), etc. is the sprung member U, and the member including the wheel W, the arm w1, etc. suspended from the suspension spring 3 is the spring. The lower member L.

  Subsequently, the relative displacement control device 5 includes a motor 50 provided on a rotating shaft portion of the rocking arm 20 with respect to the vehicle body B, a battery 51 connected to the motor 50, and a control unit (not shown). When power is supplied from the battery 51 to the motor 50 by the control unit, the motor 50 applies torque to the locking arm 20 in a direction that suppresses the vertical displacement of the sprung member U and the unsprung member L. A thrust can be applied, or a thrust can be applied in a direction that promotes the vertical displacement of the sprung member U and the unsprung member L.

  More specifically, when electric power is supplied to the motor 50 and torque is applied to the locking arm 20 in the direction to rotate clockwise in FIG. 1, the direction in which the sprung member U and the unsprung member L approach each other, that is, the spring A thrust is applied in a direction to suppress the relative displacement between the upper member U and the unsprung member L. On the other hand, when torque is applied to the locking arm 20 in the counterclockwise direction in FIG. 1, the sprung member U and the unsprung member L are separated in the vertical direction, that is, the sprung member U and the unsprung member L Thrust is given in a direction that promotes relative displacement. Since the motor 50 thus drives the locking arm 20 and functions as an actuator that exerts thrust in a direction that suppresses or promotes the relative displacement in the vertical direction of the sprung member U and the unsprung member L, the suspension device A is Can function as an active suspension.

  Subsequently, the unsprung vibration control device 1 includes a rod 6, a cylindrical weight 7 provided on the outer periphery of the rod 6 through which the rod 6 penetrates, and an elasticity as a spring element that elastically supports the weight 7. A pair of upper and lower members covering the member 8, the field 60 held by the rod 6, the coil 70 held by the inner periphery of the weight 7 and facing the field 60, and the outer periphery of the rod 6 protruding vertically from the weight 7 Bellows-shaped dust boots 9 and 9 are provided. The dynamic damper 10 is configured to include the weight 7 and the elastic member 8. The weight 7 includes a core 71 to which the coil 70 is attached, and the linear motor 11 includes the rod 6, the field 60, the coil 70, and the core 71. Yes.

  The elastic member 8 is a coil spring and is provided on the outer periphery of the rod 6 projecting downward from the weight 7. The upper end abuts on the weight 7 and the lower end is supported by the arm w 1 via the rod 6. Therefore, the weight 7 is supported by the elastic member 8 so as to be movable up and down, and the mass of the weight 7 is added to the unsprung member L via the elastic member 8. When the wheel W moves up and down and the arm w1 swings up and down, the weight 7 synchronizes and vibrates up and down. Therefore, the dynamic damper 10 reacts the inertial force of the weight 7 to prevent the arm w1 from swinging. To suppress the vertical movement of the wheel W. Thus, the dynamic damper 10 exhibits a damping force that suppresses vibration of the unsprung member L.

  As shown in FIG. 2, the weight 7 includes a core 71, a battery 12 connected to the linear motor 11, and a control unit 13, and has a cylindrical shape as a whole. In addition, bushes 72 and 73 that are in sliding contact with the outer periphery of the rod 6 are provided on both inner ends of the weight 7 in the axial direction. For this reason, the weight 7 slides along the axial direction of the rod 6, and the rod 6 also functions as a guide for guiding the weight 7 in the dynamic damper 10.

  As described above, since the rod 6 is inclined and inclined with respect to the vertical direction, the weight 7 also moves obliquely. That is, “up and down” when the weight 7 moves up and down (vibrates) is not limited to the vertical direction as long as there is a difference in height, and includes cases where it moves (vibrates) diagonally upward and diagonally downward. Since the masses of the bushes 72 and 73 and the core 71 attached to the weight 7 are also added to the unsprung member L while being elastically supported by the elastic member 8, these also function substantially as the weight of the dynamic damper 10. To do.

  The rod 6 is a cylindrical member formed of a nonmagnetic material, and is held in a state in which the field 60 is accommodated inside the rod 6. The field magnet 60 has a plurality of permanent magnets 60a arranged so that S and N poles appear alternately in the axial direction of the rod 6, and yokes 60b interposed between the permanent magnets 60a, respectively. A magnetic field is generated on the outer periphery of the rod 6. Since the outer periphery of the rod 6 protruding to the outside of the weight 7 is covered with the dust boot 9 (FIG. 1) as described above, it is possible to prevent foreign matter from adhering to the outer periphery of the rod 6. Further, since the dust boot 9 is bellows-like and can be expanded and contracted, it does not hinder the relative movement of the weight 7 and the rod 6.

  Subsequently, the core 71 constituting the weight 7 is a cylindrical member formed of a magnetic material, and the rod 6 penetrates the inside of the core 71. On the inner periphery of the core 71, a plurality of annular recesses 71a along the circumferential direction are formed side by side in the axial direction. The number of the recesses 71a is the same as that of the coils 70, and the coils 70 are held in the recesses 71a. Thus, in a state where the coil 70 is mounted on the core 71, the coil 70 is opposed to the field 60 with a predetermined gap. The coil 70 is composed of three phases of U phase, V phase, and W phase, and the linear motor 11 is a three-phase brushless motor.

  In addition, a cylindrical battery 12 is attached to the outer periphery of the core 71, and a disk-shaped control unit 13 is stacked on the upper side of the core 71 and the battery 12 with an insertion hole that allows the rod 6 to be inserted. Has been. The battery 12 is a battery with high vibration resistance such as a lithium ion battery, and the control unit 13 is an ECU (Electronic Control Unit). The control unit 13 can supply power from the battery 12 to the linear motor 11 and controls the amount and direction of the current flowing through each coil 70 to control the thrust of the linear motor 11 and the direction in which the thrust is generated. So that you can. In this way, the linear motor 11 functions as an electric motor when supplied with electric power, and can drive the weight 7 up and down.

  On the other hand, when the linear motor 11 is driven by an external force, an induced electromotive force is generated in the coil 70 by electromagnetic induction, and the linear motor 11 can also function as a generator, and the kinetic energy of the weight 7 can be converted into electric energy. . The induced electromotive force is generated in such a direction that the magnetic flux generated by the induced current hinders the change of the magnetic flux passing through the coil 70. The damping force can be adjusted by controlling the current flowing through the coil 70. In addition, since the battery 12 can be charged with the electric power obtained by the power generation of the linear motor 11, energy regeneration can be performed by the linear motor 11.

  As shown in FIG. 1, the linear motor battery 12 is connected in parallel by the motor battery 51 and the power cable c <b> 2, and power can be interchanged between the batteries 12 and 51. Further, these batteries 12 and 51 are also connected in parallel to the in-vehicle normal battery b1 through power cables c3 and c4, respectively. The vehicle-mounted normal battery b1 is a battery that is used for starting the engine in the vehicle V, a battery that supplies electric power to an electric motor that drives driving wheels, or the like.

  Hereinafter, the operation of the unsprung vibration control device 1 and the suspension device A according to the present embodiment will be described.

  When the vehicle V travels on an uneven road surface, the unsprung member L vibrates up and down, and when the weight 7 supported by the elastic member 8 vibrates up and down synchronously, the dynamic damper 10 moves the unsprung member L of the unsprung member L. Demonstrates damping force to suppress vibration. When the weight 7 moves up and down by an external force and the positions of the field 60 and the coil 70 are shifted, an induction current is generated in the coil 70 by electromagnetic induction, and the linear motor 11 generates power and suppresses vibration of the weight 7. Demonstrate the damping force. When charging the battery 12 with the electric power obtained by the power generation of the linear motor 11, the kinetic energy of the weight 7 is reduced by the amount of the charged electric energy, so that a braking force that suppresses the vibration of the weight 7 can be obtained.

  That is, the linear motor 11 functions as a damping element that exhibits a damping force that suppresses the vibration of the weight 7 of the dynamic damper 10. As described above, since the damping element is attached to the dynamic damper 10, according to the dynamic damper 10, not only the vibration of the resonance frequency of the unsprung member L but also the vibration of the frequency in the peripheral region can be suppressed. Further, the damping force of the linear motor 11 can be controlled by adjusting the amount of charge to the battery 12, and the damping force of the dynamic damper 10 can be adjusted by adjusting the damping force of the linear motor 11.

  Further, when electric power is supplied from the battery 12 to the linear motor 11 and the linear motor 11 functions as an electric motor, the linear motor 11 is dynamic when the linear motor 11 exerts thrust in a direction to suppress vibration of the weight 7. Of course, the damping force of the dynamic damper 10 can be adjusted by functioning as the damping element of the damper 10 and adjusting the damping force. Furthermore, the unsprung member L can be vibrated if the linear motor 11 exerts thrust in a direction that promotes vibration of the weight 7. And if the unsprung member L is vibrated and it cancels with the vibration input into the unsprung member L from the road surface, the vibration of the unsprung member L can be suppressed.

  Further, since the linear motor battery 12 is connected in parallel to the motor battery 51 and the vehicle-mounted normal battery b1, the electric power obtained by the power generation of the linear motor 11 is supplied to the motor 50 and the vehicle V, It can also be used in electronic devices such as an air conditioner, a car navigation system, an audio device, etc. that receive power supply from a vehicle-mounted normal battery b1. Moreover, since the linear motor 11 and the motor 50 can also receive electric power supply from the vehicle-mounted normal battery b1, the electric power supply to each apparatus is stabilized.

  Hereinafter, the operational effects of the unsprung vibration control device 1 and the suspension device A according to the present embodiment will be described.

  In the present embodiment, the suspension device A includes a motor (actuator) 50 that exerts thrust in a direction that suppresses or promotes relative displacement between the sprung member U and the unsprung member L in the vehicle V, and the sprung member U and the spring. A hydraulic damper (damper) 4 that exhibits a damping force that suppresses relative displacement of the lower member L is provided. A motor (actuator) 50 and a hydraulic damper (damper) 4 are both connected to the upper end (the other end) of the rod 6 via a locking arm (link) 20. That is, in the suspension device A, the rod 6 constitutes the link member 2 together with the locking arm 20, and the motor 50 and the hydraulic damper 4 are connected to the unsprung member L via the link member 2. In a general suspension device, these are arranged in a space formed between the wheel W, the arm w1, and the vehicle body B. According to the above configuration, the motor 50 and the hydraulic damper 4 are disposed outside the space. Can be placed. Therefore, in order to secure the mass of the weight 7 of the dynamic damper 10, even if the unsprung vibration control device 1 has to be enlarged, the mounting space for the unsprung vibration control device 1, the motor 50, and the hydraulic damper 4 is reduced. Easy to secure. Furthermore, since the suspension apparatus A includes the motor 50, the relative displacement between the sprung member U and the unsprung member L can be positively controlled.

  A direct acting cylinder device may be used instead of the motor 50 as an actuator that exerts thrust in a direction that suppresses or promotes relative displacement between the sprung member U and the unsprung member L. It can be changed appropriately. Further, as a damper that exhibits a damping force that suppresses relative displacement between the sprung member U and the unsprung member L, a damper other than the hydraulic damper 4 (for example, a pneumatic damper, a friction damper, or the like) may be used. The damping force generated by the damper may be variable. Of course, when the damping force of the damper is electrically variable, power may be supplied from the battery 12 to the damper. Further, one of the actuator and the damper may be eliminated. In the suspension device A, the suspension spring 3 is a coil spring and is provided on the outer periphery of the hydraulic damper (damper) 4. The suspension spring 3 is a spring other than the coil spring (for example, an air spring, a leaf spring, etc.). ). Further, the arrangement of the actuator, the damper, and the suspension spring 3 described above is not limited to the above, and any or all of them are arranged in a space formed between the wheel W, the arm w1, and the vehicle body B. May be.

  The suspension device A according to the present embodiment includes a motor (actuator) 50 that exerts thrust in a direction that suppresses or promotes relative displacement between the sprung member U and the unsprung member L in the vehicle V, and includes the linear motor 11. It is possible to supply power from the motor to the motor 50. For this reason, since the electric power generated by the linear motor 11 can be used not only by the linear motor 11 but also by the motor 50, the electric power can be effectively utilized by expanding the range of utilization of the electric power.

  In the suspension device A, a motor battery (actuator power storage device) 51 and a linear motor battery (linear motor power storage device) 12 are connected in parallel. For this reason, since electric power can be interchanged between the motor battery 51 and the linear motor battery 12, electric power can be supplied from the motor battery 51 to the linear motor 11, and the motor 50 and the linear motor can be supplied. 11 can be stabilized. Needless to say, the electric power generated by the motor 50 may be stored in the battery 51 by functioning as a generator when the motor 50 is driven by an external force.

  In the suspension apparatus A, a motor battery (actuator power storage device) 51 and a linear motor battery (linear motor power storage device) 12 are respectively connected in parallel to the in-vehicle normal battery b1. For this reason, since the electric power generated by the linear motor 11 can be used in each device connected to the in-vehicle normal battery b1, the range of utilization of the electric power is further expanded, and the electric power can be further effectively utilized. Furthermore, since electric power can be interchanged among the battery 51 for motors, the battery 12 for linear motors, and the vehicle-mounted normal battery b1, the electric power supply to each apparatus connected to these can be stabilized. In addition, when the battery 51 for motors is provided like the suspension apparatus A, and the battery 12 for linear motors and the vehicle-mounted normal battery b1 are connected through the battery 51, the battery for dynamic dampers and the vehicle-mounted normal battery b1 The same effect can be obtained even if the power cable c4 for connecting is removed. Moreover, the battery 51 for motors and the battery 12 for linear motors do not need to be connected, and only the power cable c2 may be removed and individually connected to the vehicle-mounted normal battery b1. Such a change is possible regardless of the configuration and arrangement of the actuator, the damper, and the suspension spring 3.

  In the suspension device A, the battery 12 is used as a power storage device for supplying electric power to the linear motor 11 or storing electric power generated by the linear motor 11, but a capacitor may be used. The same applies to the battery 51 that supplies power to the motor 50. Such a change can be made regardless of the configuration and arrangement of the actuator, the damper, and the suspension spring 3 and the connection method of the linear motor power storage device and the actuator power storage device.

  The unsprung vibration control device 1 according to the present embodiment includes a battery (linear motor power storage device) 12 connected to the linear motor 11, and the weight 7 includes the battery 12. That is, since the battery 12 is used as the weight 7 of the dynamic damper 10, it is possible to suppress an increase in the vehicle weight without adding an extra mass. In addition, since the weight 7 is configured using the battery 12 that supplies power to the linear motor 11, the number of components can be reduced, and the unsprung vibration control device 1 can be reduced in size and the cost can be reduced. Furthermore, when the battery 12 is used as the weight 7, since the coil 70 is attached to the weight 7, these distances are close and the power generated by the linear motor 11 can be charged to the battery 12 with high transmission efficiency. The configuration of the weight 7 is not limited to the above, and may be configured without including the battery 12. Such a change can be made regardless of the configuration and arrangement of the actuator, the damper, and the suspension spring 3, and the connection method and type of the linear motor power storage device and the actuator power storage device.

  Further, in the present embodiment, the linear motor 11 includes a core 71 to which the coil 70 is attached, and the weight 7 is configured to have the core 71. That is, since the battery 12 is used as the weight 7 of the dynamic damper 10, it is possible to suppress an increase in the vehicle weight without adding an extra mass. In addition, since the weight 7 is configured using the components constituting the linear motor 11, the number of components can be reduced to reduce the size of the unsprung vibration control device 1, and the cost can be reduced. Further, since the combined weight of the core 71 and the coil 70 is heavy, only these may be used as the weight 7. Further, the core 71 of the linear motor 11 is cylindrical, and the coil 70 attached to the core 71 faces the entire outer periphery of the field magnet 60, but the surface where the coil 70 and the field magnet 60 face each other is flat. The configuration of the linear motor 11 can be changed as appropriate. Such a change is possible regardless of the configuration and arrangement of the actuator, the damper, and the suspension spring 3, and the connection method and type of the linear motor power storage device and the actuator power storage device.

  The unsprung vibration control device 1 according to the present embodiment includes a weight 7 and an elastic member 8 that elastically supports the weight 7 and is connected to the unsprung member L in the vehicle V, A linear motor 11 capable of driving the weight 7 and capable of generating electric power is provided. The linear motor 11 includes a rod 6 whose lower end (one end) is connected to the unsprung member L, a field 60 held by the rod 6, and a coil 70 held by the weight 7 and facing the field 60. Is provided. For this reason, the kinetic energy of the weight 7 can be converted into electric energy by the linear motor 11. Since the electric energy is easy to use in other devices mounted on the vehicle V, the kinetic energy of the weight 7 can be used effectively. Furthermore, since the suspension apparatus A includes the linear motor 11, the unsprung member L can be excited as well as the damping force for suppressing the vibration of the unsprung member L in the dynamic damper 10 can be adjusted.

  In the unsprung vibration control device 1, the elastic member 8 that supports the weight 7 of the dynamic damper 10 so as to be movable up and down is composed only of a coil spring provided on the lower side of the weight 7. A coil spring may be included. Thus, the configuration of the dynamic damper 10 can be changed as appropriate. Such a change depends on the configuration and arrangement of the actuator, the damper, and the suspension spring 3, the connection method and type of the linear motor power storage device and the actuator power storage device, and the configuration of the weight 7 and the linear motor 11. It is possible.

  The preferred embodiments of the present invention have been described above in detail, but modifications, changes and modifications can be made without departing from the scope of the claims.

A ... suspension device, L ... unsprung member, U ... sprung member, V ... vehicle, 1 ... unsprung vibration control device, 4 ... hydraulic damper (damper), 6 ... Rod, 7 ... Weight, 8 ... Elastic member, 10 ... Dynamic damper, 11 ... Linear motor, 12 ... Battery (power storage device for linear motor), 20 ... Rocking arm (link), 50 ... motor (actuator), 60 ... field, 60a ... permanent magnet, 70 ... coil, 71 ... core

Claims (5)

A dynamic damper having a weight and an elastic member for elastically supporting the weight, and connected to an unsprung member in the vehicle;
A linear motor capable of driving the weight and generating electric power,
The linear motor includes a rod having one end connected to the unsprung member, a field magnet held by the rod, and a coil held by the weight and facing the field magnet. Lower vibration control device. The linear motor includes a core on which the coil is mounted,
The unsprung vibration control device according to claim 1, wherein the weight includes the core. While accumulating the electric power generated by the linear motor, comprising a linear motor power storage device capable of supplying electric power to the linear motor,
The unsprung vibration control device according to claim 1, wherein the weight includes the linear motor power storage device. A suspension device comprising the unsprung vibration control device according to any one of claims 1 to 3,
An actuator that exerts thrust in a direction that suppresses or promotes relative displacement between the sprung member and the unsprung member in the vehicle;
A suspension device, wherein power can be supplied from the linear motor to the actuator. A suspension device comprising the unsprung vibration control device according to any one of claims 1 to 3,
An actuator that exerts thrust in a direction that suppresses or promotes relative displacement between the sprung member and the unsprung member in the vehicle, and a damper that exhibits a damping force that suppresses relative displacement between the sprung member and the unsprung member. With at least one
One or both of the actuator and the damper are connected to the other end of the rod via a link.

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