CN115263964B - A shock absorber and its control system - Google Patents
A shock absorber and its control system Download PDFInfo
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- CN115263964B CN115263964B CN202210649657.5A CN202210649657A CN115263964B CN 115263964 B CN115263964 B CN 115263964B CN 202210649657 A CN202210649657 A CN 202210649657A CN 115263964 B CN115263964 B CN 115263964B
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- central shaft
- shock absorber
- disk
- speed increaser
- linear motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/14—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers accumulating utilisable energy, e.g. compressing air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
本申请属于车辆技术领域，特别是涉及一种减振器及其控制系统。现有的减振器结构复杂，制造成本高，难以广泛推广；发电机输入转速低，振动能量转化效率不够，且刚度及运载能力有待提高。本申请提供了一种减振器，包括依次连接的第一吊环、第一盖体、连杆机构、第一盘体、第二盘体、第二盖体和第二吊环，第一盘体上设置有中心轴，中心轴与增速器连接，增速器设置于第二盘体上，增速器与直线电机连接，中心轴与限位组件连接，第二盘体上设置有滑块，第一盘体上设置有滑轨，滑块在滑轨上滑动，第一盖体与第一盘体之间设置有阻尼器，阻尼器一端穿过第一盖体，阻尼器另一端与第一盘体连接。体积小、结构简单、发电效率高、刚度大、承载能力强。
The present application belongs to the field of vehicle technology, and in particular, relates to a shock absorber and its control system. The existing shock absorber has a complex structure, high manufacturing cost, and is difficult to be widely promoted; the input speed of the generator is low, the vibration energy conversion efficiency is insufficient, and the rigidity and carrying capacity need to be improved. The present application provides a shock absorber, including a first hanging ring, a first cover, a connecting rod mechanism, a first disk, a second disk, a second cover, and a second hanging ring connected in sequence. The first disk is provided with a central axis, the central axis is connected to a speed increaser, the speed increaser is provided on the second disk, the speed increaser is connected to a linear motor, the central axis is connected to a limit assembly, a slider is provided on the second disk, a slide rail is provided on the first disk, the slider slides on the slide rail, a damper is provided between the first cover and the first disk, one end of the damper passes through the first cover, and the other end of the damper is connected to the first disk. Small size, simple structure, high power generation efficiency, large rigidity, and strong carrying capacity.
Description
Technical Field
The application belongs to the technical field of vehicles, and particularly relates to a shock absorber and a control system thereof.
Background
The vehicle damper is disposed between the vehicle body and the wheels to eliminate adverse effects of vibration impact generated by a bumpy road surface on the comfort performance of the vehicle body, and can improve riding comfort. With the rapid development of the social science and technology civilization, the automobile industry is developing towards the scientific and intelligent direction, which also puts higher demands on the active suspension system, especially in terms of energy. As one of the main components of the suspension system, conventional shock absorbers disperse energy generated by vibration into the air in the form of thermal energy. Recent studies have however demonstrated that this part of the energy can be fully collected for driving of the vehicle, even for suspension control.
The existing shock absorber is complex in structure, relatively slow in control response when being used as an active suspension shock absorber, high in manufacturing cost, difficult to popularize widely, low in generator input rotation speed, insufficient in vibration energy conversion efficiency and high in rigidity and carrying capacity.
Disclosure of Invention
1. Technical problem to be solved
Based on the problems that the existing shock absorber is complex in structure, relatively slow in control response, high in manufacturing cost, difficult to popularize widely, low in generator input rotation speed, insufficient in vibration energy conversion efficiency and high in rigidity and carrying capacity, the shock absorber is used as an active suspension shock absorber.
2. Technical proposal
In order to achieve the above purpose, the application provides a shock absorber, which comprises a first hanging ring, a first cover body, a connecting rod mechanism, a first disk body, a second cover body and a second hanging ring which are sequentially connected, wherein a central shaft is arranged on the first disk body and is connected with a speed increaser, the speed increaser is arranged on the second disk body and is connected with a linear motor, the central shaft is connected with a limiting assembly, a sliding block is arranged on the second disk body, a sliding rail is arranged on the first disk body, the sliding block slides on the sliding rail, a damper is arranged between the first cover body and the first disk body, one end of the damper penetrates through the first cover body, and the other end of the damper is connected with the first disk body.
The other implementation mode of the application is that the second cover body is connected with one end of the cylinder body, the other end of the cylinder body is connected with the second disc body, the speed increaser is arranged in the cylinder body, and the linear motor is arranged in the cylinder body.
The other implementation mode of the application is that the connecting rod mechanism is 3 groups, the damper is arranged between the connecting rod mechanisms, the connecting rod mechanisms comprise a first rod body, a second rod body and a third rod body which are sequentially connected, one end of the first rod body is fixedly connected with the first cover body, the other end of the first rod body is provided with a first spherical groove, one end of the second rod body is a first spherical end, the other end of the second rod body is a second spherical end, one end of the third rod body is fixedly connected with the first disc body, the other end of the third rod body is provided with a second spherical groove, the first spherical end is hinged with the first spherical groove, and the second spherical end is hinged with the second spherical groove.
The other embodiment of the application is that the central shaft is connected with the first disc body through a central shaft connecting sleeve, one end of the central shaft is connected with the central shaft connecting sleeve through a first one-way bearing, the first one-way bearing is arranged in the central shaft connecting sleeve, the central shaft, the first one-way bearing and the central shaft connecting sleeve are sequentially arranged from inside to outside, the other end of the central shaft is connected with a second one-way bearing, the second one-way bearing is connected with an inner gear, the first disc body is connected with an outer gear ring, the central shaft, the second one-way bearing, the inner gear, the planet wheel and the outer gear ring are sequentially arranged from inside to outside, the inner gear, the planet wheel and the outer gear ring are sequentially meshed, and the rotation directions of the first one-way bearing and the second one-way bearing are the same.
The other implementation mode of the application is that the speed increaser is connected with the central shaft through a speed increaser connecting sleeve, the speed increaser is fixedly connected with the second disc body, and the speed increaser is fixedly connected with the linear motor.
The other implementation mode provided by the application is that the central shaft connecting sleeve is connected with the baffle cover.
The other implementation mode provided by the application is that 3 groups of the link mechanisms are connected in parallel.
The planetary gear, the bearing and the planetary shaft are sequentially arranged from outside to inside, and the planetary shaft is fixedly connected with the second disc body.
The application further provides a control system of the shock absorber, one end of the shock absorber is connected with the sprung mass, a sprung mass acceleration sensor is arranged on the sprung mass, the other end of the shock absorber is connected with the unsprung mass, a non-sprung mass acceleration sensor is arranged on the unsprung mass, the sprung mass acceleration sensor is connected with a controller, the non-sprung mass acceleration sensor is connected with the controller, and the controller is connected with an electric energy recovery circuit.
The electric energy recovery circuit comprises a current sensor, a rectifier, a converter, a super capacitor, a storage battery pack and a controllable constant current source circuit which are sequentially connected, wherein the current sensor is connected with the controller, the converter is connected with the controller, the controllable constant current source circuit is connected with the controller, the rectifier is connected with the linear motor, and the controllable constant current source circuit is connected with the linear motor.
3. Advantageous effects
Compared with the prior art, the shock absorber and the control system thereof have the beneficial effects that:
the application provides a vibration absorber, which is a low-freedom-degree serial energy feedback vibration absorber driven by a compound planetary gear and is an energy feedback vibration absorber for converting vibration energy generated in a vehicle driving process into electric energy.
The shock absorber provided by the application is an automobile energy feedback shock absorber which is small in size, simple in structure, high in power generation efficiency, high in rigidity, strong in bearing capacity and high in movement precision, and is universally applicable.
The shock absorber provided by the application can convert mechanical energy into electric energy when the automobile suspension vibrates, charge a battery of the automobile or act on other aspects of the automobile, improve the cruising ability of the electric automobile, utilize energy efficiency, and adjust the damping characteristic of the suspension to improve the comfort of the automobile.
The vibration absorber provided by the application realizes conversion and external output of vibration energy, and can also switch the suspension between the active suspension, the semi-active suspension and the passive suspension by adopting different control modes according to different road conditions so as to realize the function of damping adaptation to the road conditions.
The damper provided by the application has the advantages that the function of converting vertical up-down motion into rotary motion is realized through the use of the multi-link mechanism, the first cover body and the first disc body which are formed by the first rod body, the third rod body and the second rod body, as the one-way bearing can freely rotate in one direction and is locked in the other direction, one of the central shaft connecting sleeve and the inner side gear can drive the central shaft to rotate in the moving process, the other one of the one-way bearing and the one-way bearing can only idle, and the rotary direction of the central shaft connecting sleeve and the inner side gear is always opposite, so that the input shaft of the speed increaser can always rotate along a single direction, the rotary direction of the linear motor is ensured to be unchanged, the energy loss caused by converting the rotary direction is avoided, and the service life of the motor is prolonged.
The shock absorber provided by the application adopts a hybrid control strategy of the day-ground shed, can convert mechanical energy during vibration of the suspension of the automobile into electric energy, charges or stores a rechargeable battery of the automobile for other use, and improves the cruising ability and comfort of the electric automobile and the utilization efficiency of energy.
Drawings
FIG. 1 is a schematic view of a shock absorber structure of the present application;
FIG. 2 is a schematic cross-sectional view of a shock absorber according to the present application;
FIG. 3 is a schematic view of a first partial structure of a shock absorber according to the present application;
FIG. 4 is a schematic view of a second partial structure of the shock absorber of the present application;
Fig. 5 is a schematic diagram of the control principle of the shock absorber of the present application as a semi-active suspension.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and according to these detailed descriptions, those skilled in the art can clearly understand the present application and can practice the present application. Features from various embodiments may be combined to obtain new implementations, or substituted for certain features from certain embodiments to obtain further preferred implementations, without departing from the principles of the application.
Referring to fig. 1-5, the application provides a shock absorber, which comprises a first hanging ring, a first cover body 2, a connecting rod mechanism, a first disk body 6, a second disk body 21, a second cover body 24 and a second hanging ring which are sequentially connected, wherein a central shaft 18 is arranged on the first disk body 6, the central shaft 18 is connected with a speed increaser 22, the speed increaser 22 is arranged on the second disk body 21, the speed increaser 22 is connected with a linear motor 23, the central shaft 18 is connected with a limiting assembly, a sliding block 8 is arranged on the second disk body 21, a sliding rail is arranged on the first disk body 6, the sliding block 8 slides on the sliding rail, a damper 11 is arranged between the first cover body 2 and the first disk body 6, one end of the damper 11 penetrates through the first cover body 2, and the other end of the damper 11 is connected with the first disk body 6.
The second disc body 21 drives the speed increaser 22 responsible for energy conversion and the linear motor 23 to slide on the sliding rail in the vertical direction and compress or stretch the connecting rod mechanism, the connecting rod mechanism converts the motion into the rotation of the first disc body 6, the first disc body 6 directly drives the central shaft 18 to move in one direction only under the limit of the limiting component, and the central shaft 18 drives the linear motor 23 to rotate in one direction through the speed increaser 22 and continuously generate power. The impact on the road surface is relieved by the damper 11, the upper hanging ring 1 of the damper 11 and the two hanging rings of the first cover body 2 are coaxially fixed on the frame, and the lower hanging ring 12 of the damper 11 is connected with the first disk body 6 through pins.
The three sliding rails and the sliding blocks 8 are fixed on the three side faces of the first cover body 2 through bolts, the second disc body 21 is a disc with a variable-diameter skirt portion, the second disc body is respectively fixed with the three sliding blocks 8 through three extension plates on the side faces, the cylinder body 9 is fixed on the skirt portion of the second disc body 21 through bolts, the second cover body 24 is a disc with hanging rings, the second cover body 24 is fixed on the inner wall of the cylinder body 9 through bolts, the hanging rings on the second cover body are used for connecting axles, and circular holes for arranging wiring harnesses are arranged.
Further, the second cover 24 is connected to one end of the cylinder 9, the other end of the cylinder 9 is connected to the second disc 21, the speed increaser 22 is disposed in the cylinder 9, and the linear motor 23 is disposed in the cylinder 9.
In the running process of the automobile, the suspension vibrates up and down due to bump on the road surface, because the lifting ring 1 on the damper 11 is coaxially connected with the lifting ring of the first cover body by the pin shaft of the automobile body, the lifting ring of the second cover body of the cylinder 9 is connected with the pin shaft of the axle, the cylinder 9 is fixed on the second disc body 21, the second disc body 21 firstly converts the up-down motion of the cylinder 9 relative to the first cover body 2 during the vibration of the suspension into the sliding motion of the second disc body 21 on the sliding rail through the connection with the sliding block 8, thus limiting the motion direction of the whole damper 11, facilitating the installation of the damper 11 and the design and arrangement of an energy conversion part, and then the connection and the fixation between the speed increaser 22, the speed increaser connecting sleeve 20, the central shaft 18 and the first disc body 6 are further used for converting the vibration of the suspension into the vertical up-down motion of the first cover body 2 relative to the first disc body 6.
Further, the link mechanism is 3 groups, the damper 11 set up in between the link mechanism, the link mechanism is including the first body of rod 3, the second body of rod 10 and the third body of rod 5 that connect gradually, first body of rod 3 one end with first lid 2 fixed connection, the first body of rod 3 other end is provided with first spherical recess, second body of rod 10 one end is first ball end, the second body of rod 10 other end is the second ball end, third body of rod 5 one end with first disk 6 fixed connection, the third body of rod 5 other end is provided with the second spherical recess, first ball end with first spherical recess articulates, the second ball end with second spherical recess articulates.
Further, the central shaft 18 is connected with the first disc 6 through a central shaft connecting sleeve 13, one end of the central shaft 18 is connected with the central shaft connecting sleeve 13 through a first one-way bearing 25, the first one-way bearing 25 is arranged in the central shaft connecting sleeve 13, the central shaft 18, the first one-way bearing 25 and the central shaft connecting sleeve 13 are sequentially arranged from inside to outside, the other end of the central shaft 18 is connected with a second one-way bearing 27, the second one-way bearing 27 is connected with an inner gear 16, the first disc 6 is connected with an outer gear ring 7, the central shaft 18, the second one-way bearing 27, the inner gear 16, the planet gears 17 and the outer gear ring 7 are sequentially arranged from inside to outside, the inner gear 16, the planet gears 17 and the outer gear ring 7 are sequentially meshed, and the first one-way bearing 25 and the second one-way bearing 27 have the same rotation direction.
The transmission part is provided with three first rod bodies 3 which are respectively fixed in three oblong holes of a first cover body 2 and are locked by bolts on the side surface of the first cover body 2, three third rod bodies 5 which are in the same shape are respectively fixed in the three oblong holes of a first disk body 6 and are locked by bolts on the side surface of the first disk body 6, two spherical ends of the three second rod bodies are respectively embedded into spherical grooves formed by the first rod bodies, the third rod bodies and a bottom rod cap 4 to form a hinge joint, the 9 rods jointly form a 3-path parallel connecting rod mechanism, a central shaft connecting sleeve 13 and an outer gear ring 7 are both fixed together with the first disk body 6 through bolts, a first one-way bearing 25 is arranged in the central shaft connecting sleeve, an outer ring and an inner ring of the first one-way bearing 25 are both fixed with the central shaft connecting sleeve 13 and the central shaft 18 through flat keys respectively, a blocking cover 14 is fixed under the central shaft connecting sleeve 13 through bolts, the lower half part of the central shaft 18 is also fixed and synchronously rotated with the inner ring of a second one-way bearing 27 through flat keys, the second one-way bearing 27 is fixed with the inner ring of the second one-way bearing 16 through the flat keys, the second one-way bearing 27 is fixed with the inner ring of the planetary bearing 16 through the flat keys, the flat keys is fixed with the planetary shaft 19 and is also fixed with the planetary shaft 19 through the planetary shaft 19, the planetary shaft 19 and the inner ring 19 is fixed with the planetary shaft sleeve 19 in the middle of the three-shaped ring 19, and the planetary shaft 19 is fixed with the planetary shaft 19, and the planetary shaft 19 is sequentially and the planetary shaft 19 is fixed with the inner flange 19, and the planetary shaft 19 is fixed with the planetary shaft 19.
Further, the speed increaser 22 is connected with the central shaft 18 through a speed increaser connecting sleeve 13, the speed increaser 22 is fixedly connected with the second disc 24, and the speed increaser 22 is fixedly connected with the linear motor 23.
The input shaft of the speed increaser 22 in the energy conversion part is synchronous with the speed increaser connecting sleeve 20 through a flat key, and is fixed on the second disc body 21 through a flange plate of the speed increaser 21 through bolts, and the lower part of the speed increaser 22 is fixed with the linear motor 23 through bolts.
Further, the planetary gear 17, the bearing 26 and the planetary shaft 19 are sequentially arranged from outside to inside, and the planetary shaft 19 is fixedly connected with the second disc 24.
The first cover body 2 and the first disk body 6 move in opposite directions:
When the first cover 2 moves in opposite directions with the first disk 6, the first disk 6 is fixed, so that under the action of the multi-link mechanism, the first disk 6 rotates in a counterclockwise direction, the central shaft connecting sleeve 13 and the outer gear ring 7 connected to the first disk 6 synchronously rotate in the counterclockwise direction, but the inner gear 16 can turn into clockwise rotation through the transmission of the planet gears 17, the first one-way bearing 25 is self-locking, the second one-way bearing 27 rotates freely, the central shaft connecting sleeve 13 drives the central shaft 18 to rotate counterclockwise, the speed increaser 22 connecting sleeve drives the input shaft of the speed increaser 22 to rotate while following the central shaft 18 to rotate counterclockwise, and accordingly the input shaft of the linear motor 23 is driven to rotate to complete electric quantity output. The second rod 10 tends to be horizontal during this process.
The first cover 2 and the first disk 6 move in the reverse direction:
When the first cover 2 and the first disk 6 move reversely, the first disk 6 is fixed, so that under the action of the multi-link mechanism, the first disk 6 rotates clockwise, the central shaft connecting sleeve 13 and the outer gear ring 7 connected to the first disk 6 synchronously rotate clockwise, but through the transmission of the planet gears 17, the inner gear 16 changes to rotate anticlockwise, the first one-way bearing 25 rotates freely, the second one-way bearing 27 is self-locked, the central shaft 18 is driven by the inner gear 16 to rotate anticlockwise, the speed increaser connecting sleeve 13 drives the input shaft of the speed increaser 22 to rotate while following the central shaft 18 to rotate anticlockwise, and accordingly the input shaft of the linear motor 23 is driven to rotate to complete electric quantity output. The second rod 20 tends to be vertical during this process.
The reciprocating motion is performed in this way, the inclination and deflection of the double connecting rods are kept unchanged all the time, and the linear motor 23 always rotates in the same direction to continuously output electric quantity.
The application further provides a control system of the shock absorber, one end of the shock absorber is connected with the sprung mass 30, the sprung mass 30 is provided with the sprung mass acceleration sensor 28, the other end of the shock absorber is connected with the unsprung mass 31, the unsprung mass 31 is provided with the unsprung mass acceleration sensor 29, the sprung mass acceleration sensor 28 is connected with the controller 32, the unsprung mass acceleration sensor 29 is connected with the controller 32, and the controller 32 is connected with the electric energy recovery circuit. The control system can also realize the conversion of three vibration reduction modes, namely active vibration reduction mode, semi-active vibration reduction mode and passive vibration reduction mode, so as to obtain the best comfort and the maximum energy recovery. The vibration damper has the advantages of good vibration damping performance, high power generation efficiency, simple structure, high rigidity, strong bearing capacity, high motion precision and the like.
Further, the electric energy recovery circuit comprises a current sensor 33, a rectifier 34, a converter 35, a super capacitor 36, a storage battery pack 37 and a controllable constant current source circuit 38 which are sequentially connected, wherein the current sensor 33 is connected with the controller 32, the converter 35 is connected with the controller 32, the controllable constant current source circuit 38 is connected with the controller 32, the rectifier 34 is connected with the linear motor 23, and the controllable constant current source circuit 38 is connected with the linear motor 23.
The input end of the controller 32 is connected with a sprung mass acceleration sensor 28 for monitoring the acceleration of the sprung mass 30, a non-sprung mass acceleration sensor 29 for monitoring the acceleration of the non-sprung mass 31 and a current sensor 33 for monitoring the current in the rectifier 34, the output end of the controller 32 is respectively used for controlling a DC-DC converter 35 and a controllable constant source circuit 38, the starting point of the electric energy recovery circuit starts from the linear motor 23, the electric energy is rectified by the rectifier 34, the DC-DC converter 35 is transformed, the electric energy is temporarily stored in a super capacitor 36, the output end of the super capacitor is connected with a storage battery 37, and the storage battery 38 supplies power to the controllable constant source circuit.
The application of the linear motor 23, the shock absorber can be used not only for generating electricity, but also for generating a certain damping force to adjust the comfort of the suspension. The control principle is that the sprung mass acceleration sensor 28 and the unsprung mass acceleration sensor 29 collect the acceleration of the sprung mass and the acceleration of the unsprung mass in the suspension vibration process and transmit the information to the controller for processing to obtain the speed of the sprung mass 30And the speed of unsprung mass 31The controller judges the working mode of the suspension according to the two parameters whenIn this case, the suspension is an active suspension, and the linear motor 23 requires additional power to maintain a certain amount of dampingIf the damping force provided by the linear motor 23 is at this timeCan meet the damping force required by ideal space-ground shed mixed controlAt this time, the suspension is in semi-active mode, and can output a part of electric energy without additional energyAnd is also provided withWhen or whenAnd the damping force provided by the linear motor 23Failure to meet the damping force required by an ideal space-ground shed hybrid control strategyAt this time, the suspension is in a passive mode, no extra energy is needed, and a part of electric energy can be output.
Examples
The whole energy feedback shock absorber comprises an integral support, a motion conversion mechanism and an energy conversion part, wherein the integral shock absorber is fixed in an automobile through hanging rings and shaft pins of a first cover body 2 and a second cover body 24, the energy conversion part fixed at the lower part of a second disc body 21 and the motion conversion part above the energy conversion part vertically move up and down through a space surrounded by three guide rails through the action of a sliding rail and a sliding block 8, bottom rods in the motion conversion mechanism are matched through hole seats and are fixed through bolts, only a second rod body 10 is hinged, the limit of the vertical and horizontal is not reached all the time during operation, a central shaft connecting sleeve 13 and an inner side gear 16 are connected and fixed with a central shaft through a one-way bearing and a flat key, a planetary wheel shaft 19 is rotationally fixed in a threaded hole corresponding to the second disc body through a self-contained thread, in order to prevent the occurrence of the disconnection condition in the motion process, a blocking functional part is arranged at the top of each planetary wheel shaft, the central shaft and the bottom of the inner side gear 16 and is fixed through bolts, and a speed increaser 22 of the energy conversion mechanism and a linear motor 23 are fixed on the second disc body through bolts and are hidden in a cylinder body 9 in series.
The first cover body 2 and the first disk body 6 move in opposite directions, namely a suspension compression stroke in actual use;
In this case, since the first disc 6 is fixed, the second disc 21 drives the energy conversion mechanism to move upwards along the sliding rail to compress the space of the motion conversion mechanism, so that the connecting rod is twisted to deform to drive the first disc 6 to rotate anticlockwise, the central shaft connecting sleeve 13 and the outer gear ring 7 connected to the first disc 6 synchronously rotate anticlockwise, but the inner gear 16 becomes clockwise through the transmission of the planet gears 17, the first one-way bearing 25 is self-locked, the second one-way bearing 27 rotates freely, the central shaft connecting sleeve 13 drives the central shaft 18 to rotate anticlockwise, and the speed increaser connecting sleeve 20 drives the input shaft of the speed increaser 22 to rotate while following the central shaft 18 to rotate anticlockwise, so as to drive the input shaft of the linear motor 23 to rotate to complete electric quantity output. The second rod body tends to be horizontal in this process.
The first cover body 2 and the first disc body 6 move reversely, wherein the suspension stretching stroke is adopted in actual use;
In this case, since the first disc 6 is fixed, the second disc 21 drives the energy conversion mechanism to move downwards along the sliding rail to stretch the space of the motion conversion mechanism to be larger, so that the connecting rod is twisted to deform to drive the first disc 6 to rotate clockwise, the central shaft connecting sleeve 13 and the outer gear ring 7 connected to the first disc 6 synchronously rotate clockwise, but the inner gear 16 can turn into anticlockwise rotation through the transmission of the planet gears 17, the first unidirectional bearing 25 rotates freely, the second unidirectional bearing 27 is self-locking, the inner gear 16 drives the central shaft 18 to rotate anticlockwise, the speed increaser connecting sleeve 20 drives the input shaft of the speed increaser 22 to rotate while following the anticlockwise rotation of the central shaft 18, and the input shaft of the linear motor 23 is driven to rotate to complete electric quantity output. The second rod body tends to be vertical in this process.
The reciprocating motion is performed in this way, the inclination and deflection of the double connecting rods are kept unchanged all the time, and the linear motor 23 always rotates in the same direction to continuously output electric quantity. In this process, the linear motor 23 not only generates a certain amount of electric energy along with the vibration of the suspension, but also has a certain amount of electromagnetic damping force for adjusting the comfort of the suspension, and the working process is as follows:
Step 1, a sprung mass acceleration sensor and a non-sprung mass acceleration sensor collect acceleration of a sprung mass 30 and acceleration of a non-sprung mass 31 in the process of vibration of a suspension, and transmit information to a controller 32 for processing to obtain speed of the sprung mass And the speed of unsprung mass;
Step 2 controller based on the absolute speed of sprung mass 30And the relative speed between sprung mass 30 and unsprung mass 31Recognizing the motion state of the vehicle, and determining the working condition of the suspension:
a) When (when) When the suspension is an active suspension, additional energy is required to achieve the desired damping force to ensure comfort.
Based on the mixed control strategy of the day-ground shed, the conditions can be converted into:
, And is also provided with
Represents an ideal damping force based on a hybrid day-to-ground shed control strategy,Representing weighting coefficients based on a hybrid day-to-ground shed control strategy,Representing the damping coefficient of the ground shed.
In this mode of operation, the controller 32 controls the controllable constant source circuit 38 to power the linear motor 23, and the power from the controllable constant source circuit 38 is supplied from the battery pack 37. According to the mixed control strategy of the space and the earth, the linear motor 23 needs ideal currentThe size of (2) is:
Where k is the thrust coefficient of the linear motor.
At the same time, the controller 32 also receives a current signal from a current sensor 33, which is the winding current of the linear motor 23The controller compares the actual currentAnd ideal currentThe difference between the two is sent to a controllable constant source circuit 38 to control the current of the linear motor 23 to beThereby enabling the linear motor 23 to provide a sufficient damping force,This active control mode consumes energy.
B) When (when)If the damping force provided by the linear motor is at the same timeCan meet the damping force required by ideal space-ground shed mixed controlAt this time, the suspension is in a semi-active mode, and can output a part of electric energy without additional energy.
Based on the mixed control strategy of the day-ground shed, the conditions can be converted into the following two cases:
①, And is also provided with
②,And is also provided with
Wherein the method comprises the steps ofRepresents the zenith damping coefficient based on the zenith-zenith mixed control strategy,Representing the equivalent damping coefficient of the linear motor.
Ideal damping force at this timeOr alternativelyThe controller 32 calculates an ideal current required for the linear motor 23 based on the ideal damping forceThen passes through the winding current of the linear motor 23In contrast, the controller 32 sends instructions to the DC-DC converter 35 to regulate the actual current in the windings of the linear motor 23 via intelligent switches within the DC-DC converter 35Ideal current calculated by the tracking controller 32And changes to achieve the desired damping to damp the vibrations. While the winding current in the linear motor 23The electric energy is finally stored in the super capacitor 36 through rectification of the rectifier 34 and transformation of the DC-DC converter 35, and when the super capacitor 36 reaches a set voltage, the electric energy is charged into the storage battery 37, so that the energy feedback function of the suspension in the semi-active mode is completed.
C) When (when)And is also provided withWhen or whenAnd the damping force provided by the linear motor 23Failure to meet the damping force required by an ideal space-ground shed hybrid control strategyAt this time, the suspension is in a passive mode, no extra energy is needed, and a part of electric energy can be output.
Based on the mixed control strategy of the day-ground shed, the conditions can be converted into the following three conditions:
① And is also provided with
②,And is also provided with
③,And is also provided with
In this case the controller 32 will not supply current to the windings of the linear motor 23Exerting an influence, damping force provided by a linear motorAlso by its own winding currentIt is decided that the method comprises the steps of,Simultaneously with the rotation of the linear motor 23, the winding current thereinThe electric energy is finally stored in the super capacitor 36 through rectification of the rectifier 34 and transformation of the DC-DC converter 35, and when the super capacitor 36 reaches a set voltage, the electric energy is charged into the storage battery 37, so that the energy feedback function of the suspension in the passive mode is completed.
Through the structure and the control, the maximum power generation amount and the optimal vibration reduction effect of the vibration absorber are realized, and the performance requirement of the energy feedback suspension system is met.
Although the application has been described with reference to specific embodiments, those skilled in the art will appreciate that many modifications are possible in the construction and detail of the application disclosed within the spirit and scope thereof. The scope of the application is to be determined by the appended claims, and it is intended that the claims cover all modifications that are within the literal meaning or range of equivalents of the technical features of the claims.
Claims (7)
1. The shock absorber is characterized by comprising a first hanging ring, a first cover body, a connecting rod mechanism, a first disc body, a second cover body and a second hanging ring which are sequentially connected, wherein a central shaft is arranged on the first disc body, the central shaft is connected with a speed increaser, the speed increaser is arranged on the second disc body, the speed increaser is connected with a linear motor, the central shaft is connected with a limiting assembly, a sliding block is arranged on the second disc body, a sliding rail is arranged on the first disc body, the sliding block slides on the sliding rail, a damper is arranged between the first cover body and the first disc body, one end of the damper penetrates through the first cover body, and the other end of the damper is connected with the first disc body;
The connecting rod mechanism is 3 groups, the damper is arranged between the connecting rod mechanisms, the connecting rod mechanisms comprise a first rod body, a second rod body and a third rod body which are sequentially connected, one end of the first rod body is fixedly connected with the first cover body, the other end of the first rod body is provided with a first spherical groove, one end of the second rod body is a first spherical end, the other end of the second rod body is a second spherical end, one end of the third rod body is fixedly connected with the first disc body, the other end of the third rod body is provided with a second spherical groove, the first spherical end is hinged with the first spherical groove, and the second spherical end is hinged with the second spherical groove;
The central shaft is connected with the first disc body through a central shaft connecting sleeve, one end of the central shaft is connected with the central shaft connecting sleeve through a first one-way bearing, the first one-way bearing is arranged in the central shaft connecting sleeve, the central shaft, the first one-way bearing and the central shaft connecting sleeve are sequentially arranged from inside to outside, the other end of the central shaft is connected with a second one-way bearing, the second one-way bearing is connected with an inner gear, the first disc body is connected with an outer gear ring, the central shaft, the second one-way bearing, the inner gear, the planet wheel and the outer gear ring are sequentially arranged from inside to outside, the inner gear, the planet wheel and the outer gear ring are sequentially meshed, and the rotation directions of the first one-way bearing and the second one-way bearing are the same;
the speed increaser is connected with the central shaft through a speed increaser connecting sleeve, the speed increaser is fixedly connected with the second disc body, and the speed increaser is fixedly connected with the linear motor;
when the first cover body and the first disk body move oppositely, the central shaft connecting sleeve and the outer gear ring connected to the first disk body synchronously rotate in the anticlockwise direction, the first unidirectional bearing is self-locked, the second unidirectional bearing freely rotates, the central shaft connecting sleeve drives the central shaft to rotate anticlockwise, and the linear motor input shaft is driven to rotate to finish electric quantity output;
When the first cover body and the first disc body move reversely, the central shaft connecting sleeve and the outer gear ring connected to the first disc body synchronously rotate clockwise, the first one-way bearing rotates freely, the second one-way bearing is self-locking, the inner gear drives the central shaft to rotate anticlockwise, and the linear motor input shaft is driven to rotate to finish electric quantity output.
2. The shock absorber of claim 1, wherein the second cover is connected to one end of a cylinder, the other end of the cylinder is connected to the second disk, the speed increaser is disposed in the cylinder, and the linear motor is disposed in the cylinder.
3. The shock absorber of claim 1, wherein said center shaft adapter sleeve is connected to a retaining cap.
4. The shock absorber of claim 1 wherein 3 sets of said linkages are connected in parallel.
5. The shock absorber of claim 1, wherein the planet gears, the bearings and the planet shaft are sequentially arranged from outside to inside, and the planet shaft is fixedly connected with the second disc body.
6. A control system of a shock absorber according to any one of claims 1 to 5, wherein one end of the shock absorber is connected with a sprung mass, a sprung mass acceleration sensor is arranged on the sprung mass, the other end of the shock absorber is connected with a non-sprung mass, a non-sprung mass acceleration sensor is arranged on the non-sprung mass, the sprung mass acceleration sensor is connected with a controller, the non-sprung mass acceleration sensor is connected with the controller, and the controller is connected with an electric energy recovery circuit.
7. The control system of claim 6, wherein the power recovery circuit comprises a current sensor, a rectifier, a converter, a super capacitor, a storage battery pack and a controllable constant current source circuit which are sequentially connected, wherein the current sensor is connected with the controller, the converter is connected with the controller, the controllable constant current source circuit is connected with the controller, the rectifier is connected with the linear motor, and the controllable constant current source circuit is connected with the linear motor.
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| JP6132859B2 (en) * | 2015-01-19 | 2017-05-24 | 日立オートモティブシステムズ株式会社 | Suspension device |
| CN107061607A (en) * | 2017-03-29 | 2017-08-18 | 西北农林科技大学 | A kind of automobile vibrational energy recycles damper |
| CN107914680B (en) * | 2017-10-30 | 2020-01-07 | 燕山大学 | A Magnetic Assisted Semi-Active Pedal Feel Simulator |
| JP2020011597A (en) * | 2018-07-18 | 2020-01-23 | 本田技研工業株式会社 | Vehicle suspension system |
| CN112178103B (en) * | 2020-10-30 | 2024-07-16 | 湖南科技大学 | Eddy current damper with two-way threaded screw rod for increasing speed |
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| CN105782332A (en) * | 2016-04-20 | 2016-07-20 | 燕山大学 | Energy regeneration automobile absorber |
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