CN110154667A - A magnetic levitation active suspension device with vibration energy recovery - Google Patents

Abstract

The invention discloses a magnetic levitation active suspension device with vibration energy recovery, which includes a shock absorber placed between a vehicle body and a chassis, the shock absorber includes a cylinder body, and upper supports are respectively penetrating through the upper part and the lower part of the cylinder body A permanent magnet is arranged between the upper support rod and the lower support rod, the permanent magnet includes an inner magnet coil and a movable main permanent magnet, and the end of the inner magnet coil passes through the shock absorber and the current controller electric Connection; the outer side of the cylinder is provided with a coil outer winding, and the coil outer winding is electrically connected to the rectifier and the energy recovery device in turn; a suspension spring is arranged in parallel on one side of the shock absorber, and the two ends of the suspension spring are respectively connected to the vehicle body and the chassis. The invention can solve the problems of insufficient energy utilization efficiency and inability to adjust the stiffness of the active suspension in the prior art, and has simple and reliable structure, strong adjustability and fast detection speed.

Description

A magnetic levitation active suspension device with vibration energy recovery

technical field

The invention relates to an automobile suspension, in particular to a magnetic suspension active suspension device with vibration energy recovery.

Background technique

With the continuous development of automobiles, people have higher and higher requirements for automobiles. To measure the quality of a car, not only its power performance, but also its ride comfort are essential. Vehicle suspension is one of the important assemblies on the car, elastically connecting the body and chassis together, and plays a vital role in the ride comfort of the car. The main function of the suspension is to transmit all the forces and moments acting between the chassis and the body, and ease the impact load transmitted to the body due to uneven roads, attenuate the vibration caused by it, ensure the comfort of the occupants, and reduce the load and vehicle load. Its own dynamic load, and ensure that the car has a good ride comfort.

Modern suspension systems are mostly active suspensions, and their ride comfort and driving stability are superior to passive suspensions. Active suspensions can be divided into three categories: air suspensions, hydraulic suspensions, and electromagnetic suspensions. Air suspensions It is light in weight and can be lifted, but it is expensive, has strict requirements on the tonnage of goods, and has a high failure rate. Hydraulic suspension is smaller and easier to deploy, but has poor response and less lift range. The electromagnetic suspension has fast response speed and high reliability, but the stiffness cannot be changed, only the damping can be adjusted.

Most of the existing active suspensions and semi-active suspensions have many components, complex structures and high cost, and the suspension stiffness is not easy to change. At the same time, the suspension carries all the weight of a car except the axles. Active suspension needs to consume a lot of energy to generate active power during driving, resulting in a huge waste of resources.

Contents of the invention

The present invention aims at the above-mentioned deficiencies in the prior art, and provides a magnetic levitation active suspension device with vibration energy recovery that can solve the problems of insufficient energy utilization efficiency and inability to adjust the stiffness of the active suspension in the prior art.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

Provided is a magnetic levitation active suspension device with vibration energy recovery, which includes a shock absorber arranged between the vehicle body and the chassis, the shock absorber includes a cylinder, and the upper and lower parts of the cylinder are respectively provided with upper support rods and The lower support rod, a permanent magnet is arranged between the upper support rod and the lower support rod, the permanent magnet includes an inner magnet coil and a movable main permanent magnet, and the end of the inner magnet coil passes through the shock absorber and is electrically connected to the current controller; A coil outer winding is sheathed on the outside of the cylinder, and the coil outer winding is electrically connected to the rectifier and the energy recovery device in turn; a suspension spring is arranged parallel to one side of the shock absorber, and the two ends of the suspension spring are respectively connected to the vehicle body and the chassis.

In the above technical solution, preferably, the suspension spring is a coil spring.

In the above technical solution, preferably, the permanent magnet includes fixed permanent magnets arranged at the upper and lower ends of the cylinder body, and several magnetic levitation blocks are arranged between the fixed permanent magnets.

In the above technical solution, preferably, the main permanent magnet is movably arranged in the middle of the cylinder body, the inner magnet coil is sleeved on the main permanent magnet, and the main permanent magnet abuts against the upper support rod.

In the above technical solution, preferably, a through hole is opened in the middle of the upper support rod, and the two ends of the inner magnet coil are connected to the current controller through the through hole.

In the above technical solution, preferably, the magnetic suspension block includes an upper magnetic suspension block adjacent to the upper support rod and a lower magnetic suspension block adjacent to the lower support rod; the number of the upper magnetic suspension block and the lower magnetic suspension block is the same.

In the above technical solution, preferably, there are two upper magnetic suspension blocks and two lower magnetic suspension blocks.

In the above technical solution, preferably, the upper magnetic levitation block is socketed with the upper support rod through the installation hole opened in the middle.

In the above technical solution, preferably, opposite sides of adjacent permanent magnets have the same polarity.

In the above technical solution, preferably, the energy recovery device is a supercapacitor or a lithium battery.

The main beneficial effects of the above-mentioned magnetic levitation active suspension device with vibration energy recovery provided by the present invention are:

The present invention maintains the elastic connection between the vehicle body and the chassis by setting the shock absorber and the suspension spring; the upper support rod and the lower support rod on the shock absorber are respectively connected with the vehicle body and the chassis, thereby adjusting the suspension Damping and stiffness.

By setting permanent magnets in the shock absorber, the main permanent magnets are driven by the vibration of the vehicle body to make a small displacement in the cylinder body, and the magnetic force between the permanent magnets is transmitted, and the entire vehicle body is supported by the magnetic force and the elastic force of the suspension spring. The magnitude of the current on the coil of the inner magnet adjusts the magnetic force between the permanent magnets, thereby adjusting the stiffness of the suspension.

Since the main permanent magnet is displaced in a small distance in the cylinder, the outer winding of the coil cuts the moving magnetic field of the main permanent magnet to generate an induced alternating current, which is converted into direct current by the rectifier and stored in the energy recovery device, thereby recovering the vibration capacity.

According to Faraday's law of electromagnetic induction I=BLv/R, when the magnetic induction intensity B, the coil length L and the resistance R are known, the vibration velocity v of the main permanent magnet can be observed by monitoring the current I, and then the main permanent magnet can be detected. The function of monitoring the moving speed of the permanent magnet.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of the shock absorber.

Figure 3 is a circuit diagram of a rectifier.

Among them, 1. Body, 2. Chassis, 3. Suspension spring, 4. Shock absorber, 41. Cylinder block, 42. Upper support rod, 421. Through hole, 43. Lower support rod, 5. Permanent magnet, 51 , fixed permanent magnet, 52, magnetic suspension block, 521, upper magnetic suspension block, 522, lower magnetic suspension block, 53, main permanent magnet, 54, inner magnet coil, 55, coil outer winding, 6, current controller, 7, rectifier, 8. Energy recovery device.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, it is a schematic structural diagram of a magnetic levitation active suspension device with vibration energy recovery.

The magnetic levitation active suspension device with vibration energy recovery of the present invention includes a shock absorber 4 arranged between the vehicle body 1 and the chassis 2, the shock absorber 4 includes a cylinder 41, and the upper and lower parts of the cylinder 41 are respectively penetrated with upper Support bar 42 and lower support bar 43, permanent magnet 5 is arranged between upper support bar 42 and lower support bar 43, permanent magnet 5 comprises inner magnet coil 54 and the main permanent magnet 53 that movable setting, the end of inner magnet coil 54 It passes through the shock absorber 4 and is electrically connected to the current controller 6 .

Specifically, as shown in FIG. 2 , the permanent magnet 5 includes fixed permanent magnets 51 arranged at the upper and lower ends of the cylinder 41 , and several magnetic levitation blocks 52 are arranged between the fixed permanent magnets 51 . The opposite sides of the adjacent magnetic levitation block 52 and the fixed permanent magnet 51 have the same polarity, so that the magnetic levitation is realized by using the principle of same-sex repulsion. The main permanent magnet 53 is movably arranged in the middle of the cylinder body 41, and the polarities of the upper and lower ends of the main permanent magnet 53 are respectively the same as those of the end faces of the adjacent magnetic levitation block 52, so as to realize the magnetic levitation effect.

The magnetic suspension block 52 includes an upper magnetic suspension block 521 adjacent to the upper support bar 42 and a lower magnetic suspension block 522 adjacent to the lower support bar 43 . The upper magnetic levitation block 521 is socketed with the upper support rod 42 through the installation hole opened in the middle.

Preferably, the number of the upper magnetic suspension blocks 521 and the lower magnetic suspension blocks 522 is the same. There are two upper magnetic levitation blocks 521 and two lower magnetic levitation blocks 522 respectively.

By arranging multiple magnetic levitation blocks 52 , the magnetic force between the main permanent magnet 53 and the fixed permanent magnet 51 can be enhanced, and the effective moving distance between the main permanent magnet 53 and the magnetic levitation block 52 can be shortened.

The inner magnet coil 54 is sleeved on the main permanent magnet 53, and the middle part of the upper support rod 42 is provided with a through hole 421. The support rod abuts. The inner magnet coil 54 is led out from the through hole 421 to prevent the inner magnet coil 54 from affecting the high-speed vibration of the main permanent magnet 53 .

The outer side of the cylinder 41 is covered with a coil outer winding 55, and the coil outer winding 55 is arranged within the effective moving distance range of the main permanent magnet 53. When the vehicle moves, the main permanent magnet 53 moves up and down relative to the cylinder 41, thereby producing a change The magnetic field thus induces a current in the coil outer winding 55 .

The coil outer winding 55 is electrically connected with the rectifier 7 and the energy recovery device 8 in turn; because the motion form of the main permanent magnet 53 is vibration up and down, the induced current in the coil outer winding 55 is an alternating current; A rectifier 7 is arranged between them, as shown in FIG. 3 , so that the alternating current is converted into direct current and stored in the energy recovery device 8, realizing the collection of vibration energy in the magnetic suspension.

Preferably, the energy recovery device 8 is a supercapacitor or a lithium battery. To ensure the capacity and efficiency of storing the induced current.

One side of the shock absorber is provided with a suspension spring 3 in parallel, and the two ends of the suspension spring 3 are respectively connected with the vehicle body and the chassis. Preferably, the suspension spring 3 is a coil spring.

The vehicle body 1 and the chassis 2 are jointly connected by the suspension spring 3 and the shock absorber 4, so that the magnetic suspension can support the weight of the entire vehicle body through magnetic force and elastic force. The upper support rod 42 and the lower support rod 43 on the shock absorber 4 are respectively connected with the vehicle body 1 and the chassis 2, so as to adjust the damping and stiffness of the suspension.

The working principle of the present invention is as follows:

When the main permanent magnet 53 was not connected to the current, because the same-sex magnetic poles repelled each other, the main permanent magnet 53 was subjected to the magnetic force of the fixed permanent magnets 51 at the upper and lower ends of the cylinder body 41, and the distance between the main permanent magnet 8 and the fixed permanent magnet 51 was relatively long. The magnetic force is less, and the carrying capacity is weaker; by arranging a plurality of magnetic levitation blocks 52 respectively between the main permanent magnet 53 and the fixed permanent magnet 51, the magnetic force between the main permanent magnet 53 and the fixed permanent magnet 51 is transmitted, and the magnetic force is strengthened, thereby The load-carrying capacity of the shock absorber 4 is improved, and then connected in parallel with the suspension spring 3 to jointly support the entire vehicle body.

When the inner magnet coil 54 on the main permanent magnet 53 is fed with current, the magnetic force between the main permanent magnet 53 and the fixed permanent magnet 51 is further enhanced, thereby enhancing the load-bearing capacity.

The current controller 6 can adjust the magnitude of the magnetic field between the main permanent magnet 53 and the fixed permanent magnet 51 by controlling the magnitude of the current in the inner magnet coil 54, thereby adjusting the stiffness of the magnetic suspension.

Through the induced current generated in the coil outer winding 55, according to Faraday's law of electromagnetic induction, when a certain current is passed into the coil outer winding 55, the magnetic induction intensity B is a known quantity, and the winding coil length i and resistance R can be obtained by measurement, namely The induced current I is proportional to the moving speed v, by measuring the magnitude of the induced current I, the magnitude of the moving speed v of the main permanent magnet 53 can be obtained, and by measuring the positive and negative of the induced current I, the moving direction of the main permanent magnet 53 can be obtained.

When the inner magnet coil 54 is not fed with current, the motion state of the main permanent magnet 53 can be detected by the induced current; when the vibration speed or frequency of the main permanent magnet 53 is higher than a certain set threshold, the inner magnet coil 54 The current is passed through the medium to change the magnetic force between the permanent magnets 5, thereby changing the stiffness of the magnetic levitation suspension, so that the vibration speed or frequency of the main permanent magnet 53 returns to the set threshold, which can replace part of the sensor function and realize automatic adjustment. .

The specific embodiments of the present invention are described above so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

Claims (10)

1. a kind of magnetic suspension Active suspension device with vibration energy regeneration, which is characterized in that including being set to vehicle body and chassis Between damper, damper includes cylinder body, and the upper and lower part of cylinder body, which extends through, is provided with upper support bar and lower support bar, Permanent magnet is provided between upper support bar and lower support bar, permanent magnet includes the main permanent magnet of inner magnet coil and activity setting, Inner magnet overhang passes through damper and is electrically connected with current controller；Cylinder body outer sheath is equipped with the outer winding of coil, outside coil Winding is successively electrically connected with rectifier and recuperator；Damper side is arranged in parallel with bearing spring, and the two of bearing spring End is connect with vehicle body and chassis respectively.

2. the magnetic suspension Active suspension device according to claim 1 with vibration energy regeneration, which is characterized in that described outstanding Frame spring is helical spring.

3. the magnetic suspension Active suspension device according to claim 1 with vibration energy regeneration, which is characterized in that it is described forever Magnet includes the fixed permanent magnet for being set to upper and lower ends in cylinder body, and several magnetcisuspension floating blocks are provided between fixed permanent magnet.

4. the magnetic suspension Active suspension device according to claim 3 with vibration energy regeneration, which is characterized in that the master Permanent magnet is movably set in the middle part of cylinder body, and the inner magnet coil is sheathed on main permanent magnet, and main permanent magnet is supported with upper support bar It connects.

5. the magnetic suspension Active suspension device according to claim 4 with vibration energy regeneration, which is characterized in that on described Through-hole is offered in the middle part of support rod, the both ends of the inner magnet coil pass through through-hole and connect with current controller.

6. the magnetic suspension Active suspension device according to claim 2 with vibration energy regeneration, which is characterized in that the magnetic Suspension block includes the lower part magnetcisuspension floating block that the top magnetcisuspension floating block and neighbouring lower support bar of neighbouring upper support bar is arranged；Top magnetcisuspension Floating block is identical with lower part magnetic suspension number of blocks.

7. the magnetic suspension Active suspension device according to claim 6 with vibration energy regeneration, which is characterized in that on described Portion's magnetcisuspension floating block and lower part magnetcisuspension floating block respectively have two pieces.

8. the magnetic suspension Active suspension device according to claim 6 with vibration energy regeneration, which is characterized in that on described The mounting hole that portion's magnetcisuspension floating block is opened up by middle part socket-connects with upper support bar.

9. the magnetic suspension Active suspension device according to claim 2 with vibration energy regeneration, which is characterized in that the phase The opposite flank polarity of adjacent permanent magnet is identical.

10. the magnetic suspension Active suspension device according to claim 1 with vibration energy regeneration, which is characterized in that described Recuperator is super capacitor or lithium battery.