CN102120422A - Electric piston driven type electromobile suitable for electric braking - Google Patents
Electric piston driven type electromobile suitable for electric braking Download PDFInfo
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Abstract
The invention relates to an electric piston driven type electromobile of which the electric piston electromotor replace a diesel engine in an original motor vehicle. The electric piston driven type electromobile is suitable for electric braking and comprises an electric piston electromotor, a clutch, a gearbox, an electromobile transmission system and a starting system. When the electromobile operates, the current direction of a coil of an electromagnet in the electric piston electromotor always keeps constant; and when a piston is about to reach an upper stop point and a lower stop point, the electromagnet is controlled to rotate to 180 DEG around a height center line of the electromagnet so as to rapidly switch the magnetic polarities of the upper end and the lower end of the electromagnet so that the electromagnet repeatedly generates acting forces on the piston to drive the crankshaft and accordingly the flywheels outputs positive or negative torque outwards, therefore, the time delay in the prior art, caused by the failure of instantaneous reversal of the coil current, is avoided, and the travelling stability of the electromobile of the invention is ensured.
Description
Technical field
The present invention relates to the technical field of the battery-driven car of electric power piston motor driving, specifically is a kind of electric power piston actuated formula battery-driven car that is suitable for electric braking.
Background technology
Chinese patent literature CN101860168A discloses a kind of electric motor, its conventional engines air feed, fuel feeding, exhaust, ignition system remove, substitute with electromagnet assembly, internal piston embeds permanent magnet, direction of current by the control magnet coil comes control plunger upper and lower displacement in cylinder then, and piston is through the external outputting power of connecting bar and crankshaft mechanism.This electric motor is applicable to the vehicle such as automobile, motor bike.
The patent documentation of similar technique scheme also has CN1996724A, CN1255767A, CN200990555Y etc.
The weak point of above-mentioned electric power piston motor of the prior art is: change the magnetic polarity of electromagnet by the flow through direction of current of magnet coil of frequent switching, thereby the direction of the application force of control electromagnet and piston, and then the shift reciprocately of control plunger; But in actual implementation process,, cause to guarantee the continuity and the stability of the horsepower output or the moment of torsion of electrical motor because the direction of current of magnet coil can not instantaneously change.Therefore, the direction of current that adopt to switch the magnet coil of flowing through changes the magnetic polarity of electromagnet, thereby the technical scheme of the sense of displacement of control plunger does not have practicality.
For solving the problems of the technologies described above, Chinese patent literature CN101697445A discloses a kind of electrical motor, and it adopts the excitation coil of a pair of upper and lower settings alternately to conduct electricity, so that the piston shift reciprocately.But in actual implementation process because the electric current of excitation coil can not instantaneously change, and up and down excitation coil exist crosstalk mutually and magnetic in and etc. reason, this scheme also can't be guaranteed the continuity and the stability of the horsepower output or the moment of torsion of electrical motor.
How improving the continuity and the stability of the horsepower output or the moment of torsion of electric power piston motor, is the technical matters that this area will solve.
In addition, existing battery-driven car often adopts the motor direct-drive wheel, repacks existing petrol and diesel oil self-propelled vehicle into adopt motor direct-drive battery-driven car, and cost is higher, operation is loaded down with trivial details and difficult realization.How directly changing the gasoline and diesel engine in the existing petrol and diesel oil self-propelled vehicle into electrodynamic type, and utilize the driving system of direct drive self-propelled vehiclees such as flywheel in original self-propelled vehicle, power-transfer clutch, change speed gear box, is the technical matters that this area will solve.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of simple in structure, utilize the electric power piston motor to change gasoline and diesel engine in original self-propelled vehicle to drive the electric power piston actuated formula battery-driven car that is suitable for electric braking of driving system.
In order to solve the problems of the technologies described above, the invention provides a kind of electric power piston actuated formula battery-driven car that is suitable for electric braking, it comprises: brake system, electric power piston motor, be connected in flywheel on the bent axle in the electric power piston motor, be located at the power-transfer clutch on the flywheel, the change speed gear box that links to each other with the output shaft of power-transfer clutch, the vehicle drive system that is in transmission connection with the output shaft of change speed gear box; The driven wheel engagement of the gear ring of flywheel outer rim and a start-up system; Described electric power piston motor comprises: a plurality of cylinder bodies, the connecting rod of being located at the piston of being made by permanent magnet in the cylinder body and being used for each piston and described bent axle are in transmission connection; Bent axle is located at the below of each cylinder body; The upper end of described cylinder body is provided with the electromagnet with the cylinder body coaxial inner conductor, and magnet spool links to each other with a coil driver, and this coil driver links to each other with a CPU element; Electromagnet is located on the switching mechanism of being controlled by CPU element; The upper and lower stop place of contiguous cylinder body is provided with the upper and lower stroke switch that links to each other with CPU element respectively, and the bottom of cylinder body is provided with the Hall element that links to each other with described CPU element; Described brake system comprises: brake pedal, by the drg and the brake pedal sensor that is used to detect brake pedal position that links to each other with described CPU element of brake pedal transmission control.
When battery-driven car starts, adopt described start-up system to drive described flywheel and described bent axle is rotated, described CPU element detects the sense of displacement of each piston by the Hall element of each cylinder base; If record the piston displacement downward in the cylinder body, then described CPU element provides the electric current of respective direction to the magnet spool of this cylinder body top by described coil driver, so that the magnetic polarity of this electromagnet bottom is identical with the magnetic polarity of piston head, piston quickens to move down in this cylinder body because of the following repulsion from electromagnet; If record the piston displacement forward in the cylinder body, then described CPU element provides the electric current of respective direction to the magnet spool of this cylinder body top by described coil driver, so that the magnetic polarity of this electromagnet bottom is opposite with the magnetic polarity of piston head, piston quickens to move in this cylinder body because of the last suction from electromagnet; Treat each magnet spool get electric after, disconnect described start-up system and keep the direction of current in each coil constant; Simultaneously, when described CPU element records piston in the cylinder body and is about to arrive the bottom dead point of this cylinder body by described lower stroke switch, CPU element is controlled this cylinder body top by described switching mechanism electromagnet is around the height line of centers Rotate 180 of this electromagnet °, and the piston of this moment has arrived bottom dead point, because the magnetic polarity of the electromagnet of this moment bottom is opposite with the magnetic polarity of piston head, piston begins in this cylinder body to top offset because of the last suction from electromagnet; When described CPU element records piston in the cylinder body and is about to arrive the top dead point of this cylinder body by described upper stroke switch, CPU element is controlled this cylinder body top by described switching mechanism electromagnet is around 180 ° of the height line of centers contrarotations of this electromagnet, and the piston of this moment has arrived top dead point, because the magnetic polarity of the electromagnet of this moment bottom is identical with the magnetic polarity of piston head, piston begins to bottom offset because of the following repulsion from electromagnet; So repeatedly, export positive moment of torsion thereby make each piston drive described crankshaft operation and drive described flywheel through corresponding connecting rod, flywheel is by power-transfer clutch, change speed gear box powered vehicle driving system, thus the driving battery-driven car.
When recording brake pedal by brake pedal sensor, CPU element is operated, be that brake system is implemented glancing impact, CPU element actuating motor retrosequence, that is: the described coil driver of CPU element elder generation control stops to each coil power supply, detect the sense of displacement of each piston then by described Hall element by described CPU element, if record piston displacement downward, then CPU element provides the electric current of respective direction to cooresponding coil by described coil driver, so that the magnetic polarity of corresponding electromagnet bottom is opposite with the magnetic polarity of piston head, with the speed that moves down of reduction piston, thereby brake described bent axle; If record piston displacement forward, then CPU element provides the electric current of respective direction to cooresponding coil by described coil driver, so that the magnetic polarity of corresponding electromagnet bottom is identical with the magnetic polarity of piston head, moving speed on the reduction piston, thereby brake described bent axle; When described bent axle does not shut down, if CPU element records the bottom dead point that this piston is about to arrive this cylinder body by described lower stroke switch, then the CPU element electromagnet of controlling this cylinder body top by described switching mechanism is around the height line of centers Rotate 180 of this electromagnet °, if the piston of this moment has arrived bottom dead point and has begun to top offset, because the magnetic polarity of the electromagnet bottom of this moment is identical with the magnetic polarity of piston head, piston is braked described bent axle beginning to bear from the following repulsion of electromagnet in top offset; If CPU element records the top dead point that this piston is about to arrive this cylinder body by described upper stroke switch, then the CPU element electromagnet of controlling this cylinder body top by described switching mechanism is around 180 ° of the height line of centers contrarotations of this electromagnet, if the piston of this moment has arrived top dead point and has begun to bottom offset, because the magnetic polarity of the electromagnet of this moment bottom is opposite with the magnetic polarity of piston head, piston is braked described bent axle because of the last suction from electromagnet; So repeatedly, so that described flywheel is externally exported negative torque, when described bent axle is about to shut down, stop to each coil power supply; Or it is released to record brake pedal until CPU element by brake pedal sensor, and promptly brake system stops to implement glancing impact, stops to each coil power supply.
Technique scheme of the present invention has the following advantages compared to existing technology: (1) electric power piston motor of the present invention in the course of the work, the magnet spool direction of current remains constant; When piston is about to arrive upper and lower stop, the control electromagnet is around 180 ° of its height line of centers fast rotational, at high speed switches the magnetic polarity of electromagnet upper and lower side, thereby makes electromagnet produce positive acting power to piston repeatedly, and then drives bent axle and make the externally positive moment of torsion of output of flywheel.The such scheme that the present invention adopts, that has avoided prior art can't realize the time-delay that instantaneous reverse brings because of coil current, and then makes the horsepower output of electrical motor of the present invention or moment of torsion have continuity and stability preferably, practicality is better.(2) electrical motor of the present invention is when starting, adopt start-up system that described flywheel is rotated, CPU element detects the sense of displacement of each piston by the Hall element in each cylinder body, so that the electric current of respective direction to be provided to each coil by coil driver according to the sense of displacement of each piston, to realize that each piston drives bent axle by corresponding connecting rod and turns round continuously, disconnect start-up system then, thereby realized the reliable startup of electrical motor of the present invention.(3) in the flywheel operation process, when needing flywheel externally to export negative torque, stop earlier to each coil power supply, CPU element detects the sense of displacement of each piston by the Hall element in each cylinder body then, and provide the electric current of respective direction and holding current direction constant by coil driver to each coil according to the sense of displacement of each piston, then according to each position of piston, switch the magnetic polarity of electromagnet upper and lower side fast around the mode of 180 ° of its height line of centers fast rotational by electromagnet, thereby make electromagnet produce dumping force to each piston repeatedly, and then brake bent axle and make described flywheel externally export negative torque.(4) Hall element among the present invention is located at the bottom center of cylinder body, and relative with the bottom surface central authorities of described piston.Because two magnetic poles of piston distribute with straight line up and down with two magnetic poles of electromagnet, so the electromagnetic signal that Hall element obtains is substantially from piston base, and promptly Hall element is not subjected to the interference of electromagnet substantially, has guaranteed the reliability of piston position detection.During concrete enforcement, also can adopt electromagnetic compensation and/or shielding shielding measure, improve the reliability of Hall element output signal except that the electromagnetic signal of vertical direction.(5) among the present invention, each piston is symmetrically distributed in the height line of centers both sides of cylinder body in corresponding cylinder body, have homogeneity and stability preferably to guarantee the application force on each piston action and the bent axle.(6) battery-driven car of the present invention mainly is meant electronlmobil, also can be battery-operated motor cycle, electro-tricycle, electronic farm machinery car etc.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the electric power piston motor among the embodiment;
Fig. 2 a kind ofly is used to control electromagnet around the switching mechanism of its height line of centers Rotate 180 ° and the structural representation of cylinder body for what the electric power piston motor among the embodiment adopted;
Fig. 3 is the circuit block diagram of the control circuit of described electric power piston motor;
Fig. 4 is the transmission system constructional drawing of the electric power piston actuated formula battery-driven car among the embodiment;
Fig. 5 is the another kind of described switching mechanism of the electric power piston motor employing among the embodiment and the structural representation of cylinder body.
The specific embodiment
See Fig. 1-3, the electric power piston actuated formula battery-driven car that is suitable for electric braking of present embodiment, it comprises: brake system, electric power piston motor 20, be connected in flywheel on the bent axle in the electric power piston motor 20, be located at the power-transfer clutch 21 on the flywheel, the change speed gear box 22 that links to each other with the output shaft of power-transfer clutch 21, the vehicle drive system that is in transmission connection with the output shaft of change speed gear box 22; The driven wheel engagement of the gear ring of flywheel outer rim and a start-up system.This start-up system adopts the matching used start-up system of of the prior art and existing engine petrol.
Described vehicle drive system comprises: the axle drive shaft 24 that is in transmission connection through the universal-joint 23 and the output shaft of change speed gear box 22, the diff 27 that is in transmission connection through another universal-joint and axle drive shaft 24 and the wheel that links to each other by semiaxis 26 transmissions with diff 27.Wherein, at axle drive shaft 24 and diff 27 main reduction gear 25 can be set.
Described electric power piston motor 20 comprises: the cylinder body 1 that a plurality of high resistance non-magnet materials (as: aluminum alloy, copper alloy etc.) are made, be located at the piston of being made by permanent magnet 5 in the cylinder body 1, the connecting rod 3 of being located at the bent axle 2 of each cylinder body 1 below and being used for each piston 5 and described bent axle 2 are in transmission connection; The upper end of described cylinder body 1 is provided with the electromagnet 7 with cylinder body 1 coaxial inner conductor, and the coil 8 of electromagnet 7 links to each other with a coil driver; The central authorities of electromagnet 7 are fixed in the horizontal rotating shaft 9, and this rotating shaft 9 is located at cylinder body 1 top by pair of bearing 4; One end of rotating shaft 9 links to each other with a stepping motor 12 transmissions through a change speed gear box 11; Described coil driver links to each other with a CPU element with stepping motor 12; The upper and lower stop place of contiguous cylinder body 1 is provided with the upper and lower stroke switch 13 and 14 that links to each other with CPU element respectively; The bottom center of described cylinder body 1 is provided with a Hall element 15 that links to each other with described CPU element.Described Hall element 15 is relative with the bottom surface central authorities of described piston 5.Hall element 15 is located in the metal tube of a non-magnet material, this metal tube and described piston 5 coaxial inner conductors.Further to make electromagnetic signal that Hall element 15 obtains substantially from the bottom of piston.
Described brake system comprises: brake pedal and the brake pedal sensor that is used to detect brake pedal position that links to each other with described CPU element; Described upper and lower stroke switch 13 and 14 adopts contact or infrared-type travel switch.Piston 5 is provided with wear-resisting circle.
Each piston 5 is symmetrically distributed in the height line of centers both sides of cylinder body 1 in corresponding cylinder body 1.Guaranteeing that connecting rod 3 is suitable for continuous driving crank 2, and make the moment of torsion of bent axle 2 outputs stable.
During work, adopt described start-up system to drive described flywheel, so that described bent axle 2 rotates, described CPU element detects the sense of displacement of each piston 5 by the Hall element 15 of each cylinder body 1 bottom; At this moment, if record piston 5 displacement downward in the cylinder body 1, then described CPU element provides the electric current of respective direction to the coil 8 of the electromagnet 7 of this cylinder body 1 top by described coil driver, so that the magnetic polarity of these electromagnet 7 bottoms is identical with the magnetic polarity at piston 5 tops, piston 5 quickens to move down in this cylinder body 1 because of the following repulsion from electromagnet 7; Or, this moment is as if piston 5 displacement forward that records in the cylinder body 1, then described CPU element provides the electric current of respective direction to the coil 8 of the electromagnet 7 of this cylinder body 1 top by described coil driver, so that the magnetic polarity of these electromagnet 7 bottoms is opposite with the magnetic polarity at piston 5 tops, piston 5 quickens to move in this cylinder body 1 because of the last suction from electromagnet 7; Treat each electromagnet 7 coil 8 electric after, disconnect described start-up system and keep the direction of current in each coil 8 constant; Simultaneously, when described CPU element records piston 5 in the cylinder body 1 and is about to arrive the bottom dead point of this cylinder body 1 by described lower stroke switch 14, CPU element is to impulse singla of described stepping motor 12 outputs, rotate a fixing angle to drive this stepping motor 12 by the direction of setting, thereby make stepping motor 12 through described rotating shaft 9 Rotate 180s of described change speed gear box 11 controls °, and the piston 5 of this moment arrives bottom dead point just or, because the magnetic polarity of electromagnet 7 bottoms of this moment is opposite with the magnetic polarity at piston 5 tops, piston 5 begins in this cylinder body 1 to top offset because of the last suction from electromagnet 7; When described CPU element records this piston 5 and is about to arrive the top dead point of this cylinder body 1 by described upper stroke switch 13, CPU element is to described stepping motor 12 another impulse singlas of output, to drive fixing angle of these stepping motor 12 counter-rotation, thereby make stepping motor 12 through 180 ° of described rotating shaft 9 contrarotations of described change speed gear box 11 controls, and the piston 5 of this moment arrives top dead point just or, and piston 5 begins to bottom offset because of following repulsion; So repeatedly, export positive moment of torsion thereby make each piston 5 drive described bent axle 2 runnings through corresponding connecting rod 3 to drive described flywheel, flywheel is by power-transfer clutch 21, change speed gear box 22 powered vehicle driving systems, thus the driving battery-driven car.
During the invariant position of the described speed governing pedal of non-releasing orientation, described CPU element detects the position of described piston 5 by Hall element 15, to draw the spacing of described piston 5 and electromagnet 7 in the same cylinder body 1, and adjust size of current in the described coil 8 by described coil driver in real time according to this spacing size, so that described piston 5 moves past in the journey at upper and lower, keep the size of the application force between piston 5 and the electromagnet 7 stable, so that the continuity of the power of this electrical motor output or moment of torsion and stability are better.When the position change of described speed governing pedal, the described piston 5 in the also same cylinder body 1 of described CPU element and the spacing of electromagnet 7 are adjusted the size of current in each coil 8 in real time, so that the variation of force between piston 5 and the electromagnet 7 is linear, and it is corresponding with the change in location of described speed governing pedal, and then make the speed of a motor vehicle be linear change, to pass through driver comfort.
The speed governing pedal of this battery-driven car (it adopts Das Gaspedal of the prior art) is provided with the speed governing pedal sensor that links to each other with described CPU element, CPU element detects the position of speed governing pedal by the speed governing pedal sensor, and then control the size of current of each coil 8, thereby realize speed of a motor vehicle control.The speed governing pedal sensor can be selected pressure sensor for use, exports corresponding force value signal according to the degree of depth that the speed governing pedal is entered into.Described speed governing pedal can adopt speed regulating handle (it adopts the speed regulating handle of Electrical Bicycle of the prior art) to replace, to be applied to battery-operated motor cycle or electro-tricycle etc.
Described CPU element also is connected with the vehicle Slope Transducer (can adopt the disclosed automobile Slope Transducer of Chinese patent literature CN2703248) that is used to detect vehicle chassis angle degree; When the moving ahead of this battery-driven car, if record current vehicle in upwards climbing, and record the invariant position of speed governing pedal by described vehicle Slope Transducer, then CPU element is according to the gradient size corresponding electric current of heightening each coil 8 automatically, so that the speed of a motor vehicle is stable.If record the invariant position that current vehicle comes down downwards and records the speed governing pedal by described vehicle Slope Transducer, then CPU element is according to the automatic corresponding electric current of turning down each coil 8 of gradient size, so that the speed of a motor vehicle is stable.
When recording downward grades when big, for example greater than 10 °, and it is released to record the speed governing pedal, no matter whether brake pedal is operated, and CPU element actuating motor retrosequence.
When CPU element actuating motor retrosequence, because described bent axle 2 is in operative condition, the CPU element described coil driver of control earlier stops to 8 power supplies of each coil; Detect the sense of displacement of each piston 5 then by described Hall element 15 by described CPU element, if record piston 5 displacement downward, then CPU element provides the electric current of respective direction to cooresponding coil 8 by described coil driver, so that the magnetic polarity of corresponding electromagnet 7 bottoms is opposite with the magnetic polarity at piston 5 tops, to reduce the speed that moves down of piston 5, thereby brake described bent axle 2, that is: make described flywheel externally export negative torque; If record piston 5 displacement forward, then CPU element provides the electric current of respective direction to cooresponding coil 8 by described coil driver, so that the magnetic polarity of corresponding electromagnet 7 bottoms is identical with the magnetic polarity at piston 5 tops, moving speed on the reduction piston 5, thereby brake described bent axle 2.
When described bent axle 2 does not shut down yet, if CPU element records the bottom dead point that this piston 5 is about to arrive this cylinder body 1 by described lower stroke switch 14, then CPU element is to impulse singla of described stepping motor 12 outputs, rotate a fixing angle to drive this stepping motor 12 by the direction of setting, thereby make stepping motor 12 through described rotating shaft 9 Rotate 180s of described change speed gear box 11 controls °, if the piston 5 of this moment arrives bottom dead point just or and begins to top offset, then because the magnetic polarity of electromagnet 7 bottoms of this moment is identical with the magnetic polarity at piston 5 tops, piston 5 is braked described bent axle 2 beginning to bear from the following repulsion of electromagnet 7 in top offset; If CPU element records the top dead point that this piston 5 is about to arrive this cylinder body 1 by described upper stroke switch 13, then CPU element is to described stepping motor 12 another impulse singlas of output, to drive fixing angle of these stepping motor 12 backward rotation, thereby make stepping motor 12 through 180 ° of described rotating shaft 9 contrarotations of described change speed gear box 11 controls, if the piston 5 of this moment arrives top dead point just or and begins to bottom offset, then because the magnetic polarity of electromagnet 7 bottoms of this moment is opposite with the magnetic polarity at piston 5 tops, piston 5 is because of braking described bent axle 2 from the last suction of electromagnet 7; So repeatedly, so that described flywheel is externally exported negative torque, reduce in the safety speed until the speed of a motor vehicle, as 30Km/h; Or, recording the speed governing pedal until CPU element by the speed governing pedal sensor and depressed again, this moment, CPU element was controlled the positive moment of torsion of the normal output of described flywheel again.
When the rate of displacement that described CPU element detects each piston 5 by Hall element 15 is lower than preset value (this preset value can obtain by experiment), judge that promptly described bent axle 2 is about to shut down.The electric current of considering coil 8 can not transient change, and therefore when described bent axle 2 is about to shut down, the power supply of early cut-off coil 8 is beneficial to energy-conservation and guarantees that described bent axle 2 can in time shut down.
When externally exporting brake torque by described bent axle 2, the electric current that described coil driver provides to described coil 8 is a pulse current.Described coil 8 one sides are provided with air cooling equipment or described coil 8 is located in the oil cooling device; The temperature of the dutycycle of the pulse current in the coil 8 and described coil 8 is linear or non-linear negative correlation, in case principal vertical line circle 8 is overheated.
In the battery-driven car driving process, if CPU element records the speed of a motor vehicle by car speed sensor and is lower than 30Km/h, then CPU element startup idling slides program.Be that CPU element is controlled size of current in each coil 8, so that the speed of a motor vehicle is stable at 20Km/h.
The brake system of this battery-driven car adopts the brake system of the gasoline fueled motor vehicle of prior art.
Higher when the speed of a motor vehicle, as greater than 40Km/h, CPU element records brake pedal by brake pedal sensor and is operated, be that brake system is implemented glancing impact, CPU element is the actuating motor retrosequence also, when described bent axle 2 is about to shut down, stops to 8 power supplies of each coil; Or it is released to record brake pedal until CPU element by brake pedal sensor, and promptly brake system stops to implement glancing impact, stops to 8 power supplies of each coil; CPU element is controlled described flywheel again and is exported positive moment of torsion; If CPU element was controlled described flywheel again and was exported positive moment of torsion when recording the speed governing pedal and being operated this moment.
Fig. 5 is the structural representation of another kind of described switching mechanism, electromagnet 7 is located on the miniature gears 16, and the center shaft of this miniature gears 16 is located on the center-point of electromagnet 7, and this miniature gears 16 is meshed with a big gear wheel 17, and this big gear wheel 17 links to each other with described change speed gear box 11 transmissions; During work, CPU element is to impulse singla of described stepping motor 12 outputs, rotate a fixing angle to drive this stepping motor 12 by the direction of setting, thereby make stepping motor 12 through 180 ° of described change speed gear box 11, big gear wheel 17 described miniature gears 16 cws of control or left-hand revolutions.
Obviously, the foregoing description only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (6)
1. electric power piston actuated formula battery-driven car that is suitable for electric braking is characterized in that comprising: brake system, electric power piston motor (20), be connected in flywheel on the bent axle in the electric power piston motor (20), be located at the power-transfer clutch (21) on the flywheel, the change speed gear box (22) that links to each other with the output shaft of power-transfer clutch (21), the vehicle drive system that is in transmission connection with the output shaft of change speed gear box (22);
The driven wheel engagement of the gear ring of described flywheel outer rim and a start-up system;
Described electric power piston motor (20) comprising: a plurality of cylinder bodies (1), the connecting rod (3) of being located at the piston of being made by permanent magnet (5) in the cylinder body (1) and being used for each piston (5) and described bent axle (2) are in transmission connection; Bent axle (2) is located at the below of each cylinder body (1);
The upper end of described cylinder body (1) is provided with the electromagnet (7) with cylinder body (1) coaxial inner conductor, and the coil (8) of electromagnet (7) links to each other with a coil driver, and this coil driver links to each other with a CPU element; Electromagnet (7) is located on the switching mechanism of being controlled by CPU element;
The upper and lower stop place of contiguous cylinder body (1) is provided with the upper and lower stroke switch (13,14) that links to each other with CPU element respectively, and the bottom of cylinder body (1) is provided with the Hall element (15) that links to each other with described CPU element; Described brake system comprises: brake pedal, by the drg and the brake pedal sensor that is used to detect brake pedal position that links to each other with described CPU element of brake pedal transmission control;
When battery-driven car starts, adopt described start-up system to drive described flywheel and described bent axle (2) is rotated, the Hall element (15) of described CPU element bottom each cylinder body (1) detects the sense of displacement of each piston (5);
If record piston (5) displacement downward in the cylinder body (1), then described CPU element provides the electric current of respective direction to the coil (8) of the electromagnet (7) of this cylinder body (1) top by described coil driver, so that the magnetic polarity of this electromagnet (7) bottom is identical with the magnetic polarity at piston (5) top, piston (5) quickens to move down in this cylinder body (1) because of the following repulsion from electromagnet (7);
If record piston (5) displacement forward in the cylinder body (1), then described CPU element provides the electric current of respective direction to the coil (8) of the electromagnet (7) of this cylinder body (1) top by described coil driver, so that the magnetic polarity of this electromagnet (7) bottom is opposite with the magnetic polarity at piston (5) top, piston (5) quickens to move in this cylinder body (1) because of the last suction from electromagnet (7);
Treat each electromagnet (7) coil (8) electric after, disconnect described start-up system and keep the direction of current in each coil (8) constant;
Simultaneously, when described CPU element records piston (5) in the cylinder body (1) and is about to arrive the bottom dead point of this cylinder body (1) by described lower stroke switch (14), CPU element is controlled this cylinder body (1) top by described switching mechanism electromagnet (7) is around the height line of centers Rotate 180 of this electromagnet (7) °, and the piston (5) of this moment has arrived bottom dead point, because the magnetic polarity of the electromagnet (7) of this moment bottom is opposite with the magnetic polarity at piston (5) top, piston (5) begins in this cylinder body (1) to top offset because of the last suction from electromagnet (7); When described CPU element records piston (5) in the cylinder body (1) and is about to arrive the top dead point of this cylinder body (1) by described upper stroke switch (13), CPU element is controlled this cylinder body (1) top by described switching mechanism electromagnet (7) is around 180 ° of the height line of centers contrarotations of this electromagnet (7), and the piston (5) of this moment has arrived top dead point, because the magnetic polarity of the electromagnet (7) of this moment bottom is identical with the magnetic polarity at piston (5) top, piston (5) begins to bottom offset because of the following repulsion from electromagnet (7); So repeatedly, turn round and drive described flywheel and export positive moment of torsion thereby make each piston (5) drive described bent axle (2) through corresponding connecting rod (3), flywheel is by power-transfer clutch (21), change speed gear box (22) powered vehicle driving system, thereby drives battery-driven car;
Be operated when CPU element records brake pedal by brake pedal sensor, promptly brake system is implemented glancing impact, CPU element actuating motor retrosequence, that is:
The CPU element described coil driver of control earlier stops to power to each coil (8), detect the sense of displacement of each piston (5) then by described Hall element (15) by described CPU element, if record a piston (5) displacement downward, then CPU element provides the electric current of respective direction to cooresponding coil (8) by described coil driver, so that the magnetic polarity of corresponding electromagnet (7) bottom is opposite with the magnetic polarity at piston (5) top, with the speed that moves down of reduction piston (5), thereby brake described bent axle (2); If record a piston (5) displacement forward, then CPU element provides the electric current of respective direction to cooresponding coil (8) by described coil driver, so that the magnetic polarity of corresponding electromagnet (7) bottom is identical with the magnetic polarity at piston (5) top, with reduce piston (5) on move speed, thereby brake described bent axle (2);
At described bent axle (2) when not shutting down, if CPU element records the bottom dead point that this piston (5) is about to arrive this cylinder body (1) by described lower stroke switch (14), then the CPU element electromagnet (7) of controlling this cylinder body (1) top by described switching mechanism is around the height line of centers Rotate 180 of this electromagnet (7) °, if the piston (5) of this moment has arrived bottom dead point and has begun to top offset, because the magnetic polarity of electromagnet (7) bottom of this moment is identical with the magnetic polarity at piston (5) top, piston (5) is braked described bent axle (2) beginning to bear from the following repulsion of electromagnet (7) in top offset; If CPU element records the top dead point that this piston (5) is about to arrive this cylinder body (1) by described upper stroke switch (13), then the CPU element electromagnet (7) of controlling this cylinder body (1) top by described switching mechanism is around 180 ° of the height line of centers contrarotations of this electromagnet (7), if the piston (5) of this moment has arrived top dead point and has begun to bottom offset, because the magnetic polarity of the electromagnet (7) of this moment bottom is opposite with the magnetic polarity at piston (5) top, piston (5) is because of braking described bent axle (2) from the last suction of electromagnet (7); So repeatedly, so that described flywheel is externally exported negative torque, when being about to shut down, stop to power to each coil (8) until described bent axle (2); Or it is released to record brake pedal until CPU element by brake pedal sensor, and promptly brake system stops to implement glancing impact, stops to power to each coil (8).
2. the electric power piston actuated formula battery-driven car that is suitable for electric braking according to claim 1, it is characterized in that: when the described speed governing pedal of non-releasing orientation or the invariant position of handgrip, described CPU element detects the position of described piston (5) by Hall element (15), to draw the spacing of interior described piston (5) of same cylinder body (1) and electromagnet (7), and adjust size of current in the described coil (8) by described coil driver in real time according to this spacing size, so that described piston (5) is last, in the bottom offset process, keep the size of the application force between piston (5) and the electromagnet (7) stable.
3. the electric power piston actuated formula battery-driven car that is suitable for electric braking according to claim 2 is characterized in that: each piston (5) is symmetrically distributed in the height line of centers both sides of cylinder body (1) in corresponding cylinder body (1).
4. the electric power piston actuated formula battery-driven car that is suitable for electric braking according to claim 1, it is characterized in that: when the rate of displacement that described CPU element detects each piston (5) by Hall element (15) is lower than preset value, judge that promptly described bent axle (2) is about to shut down.
5. the electric power piston actuated formula battery-driven car that is suitable for electric braking according to claim 1, it is characterized in that: described Hall element (15) is located at the bottom center of cylinder body (1), and relative with the bottom surface central authorities of described piston (5).
6. the electric power piston actuated formula battery-driven car that is suitable for electric braking according to claim 5, it is characterized in that: described Hall element (15) is located in the metal tube of a non-magnet material, this metal tube and described piston (5) coaxial inner conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110027296A CN102120422B (en) | 2011-01-25 | 2011-01-25 | Electric piston driven type electromobile suitable for electric braking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110027296A CN102120422B (en) | 2011-01-25 | 2011-01-25 | Electric piston driven type electromobile suitable for electric braking |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210187877.7A Division CN102673408B (en) | 2011-01-25 | 2011-01-25 | Power piston drive-type electrocar suitable for electric brake and working method of electrocar |
| CN201210187878.1A Division CN102673389B (en) | 2011-01-25 | 2011-01-25 | Electric power piston driving type electric vehicle and working method thereof |
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| Publication Number | Publication Date |
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| CN102120422A true CN102120422A (en) | 2011-07-13 |
| CN102120422B CN102120422B (en) | 2012-09-05 |
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| CN110884357A (en) * | 2019-11-20 | 2020-03-17 | 台州学院 | Braking energy recovery device of automatic driving automobile |
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| Publication number | Publication date |
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| CN102120422B (en) | 2012-09-05 |
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