阅读说明：本技术 带扭振主动抑制功能的轮边永磁直驱传动装置及工作方法 (Wheel-side permanent-magnet direct-drive transmission device with torsional vibration active suppression function and working method ) 是由 鞠锦勇 翟荣杰 张春蕊 刘玉飞 苏学满 于 2021-08-27 设计创作，主要内容包括：本发明公开一种带扭振主动抑制功能的轮边永磁直驱传动装置及工作方法,适用于电动汽车驱动控制领域。包括大功率永磁电机通过相互连接的传动轴Ⅰ和传动轴Ⅱ与车辆的轮毂通过等速万向节相连接,其中大功率永磁电机与传动轴Ⅰ之间设有十字联轴器,十字联轴器与大功率永磁电机的输出轴连接,与传动轴Ⅰ连接,传动轴Ⅰ与传动轴Ⅱ之间设有扭振抑制装置,扭振抑制装置与传动轴Ⅰ之间设有输入法兰,扭振抑制装置与传动轴Ⅱ之间设有输出法兰,利用扭振抑制装置转移系统扭振,并基于电磁作用力进行主动调节,抑制轮边驱动永磁直驱传动装置扭振的同时保证轮毂的驱动力；其应用范围广、可移植性强,可保证轮边驱动永磁直驱传动系统在电动客车上的可靠应用。(The invention discloses a wheel-side permanent magnet direct-drive transmission device with a torsional vibration active suppression function and a working method, and is suitable for the field of electric automobile drive control. The high-power permanent magnet motor is connected with a wheel hub of a vehicle through a transmission shaft I and a transmission shaft II which are connected with each other through a constant velocity universal joint, wherein a cross coupling is arranged between the high-power permanent magnet motor and the transmission shaft I, the cross coupling is connected with an output shaft of the high-power permanent magnet motor and is connected with the transmission shaft I, a torsional vibration suppression device is arranged between the transmission shaft I and the transmission shaft II, an input flange is arranged between the torsional vibration suppression device and the transmission shaft I, an output flange is arranged between the torsional vibration suppression device and the transmission shaft II, the torsional vibration suppression device is used for transferring the torsional vibration of a system and carrying out active adjustment based on electromagnetic acting force, and the driving force of the wheel hub is ensured while the wheel edge driving permanent magnet direct drive transmission device is suppressed from torsional vibration; the wheel-side driving permanent magnet direct-drive transmission system is wide in application range and strong in transportability, and can ensure the reliable application of the wheel-side driving permanent magnet direct-drive transmission system on the electric motor coach.)

1. The utility model provides a take wheel limit permanent magnetism of torsional vibration initiative suppression function directly drives transmission which characterized in that: it comprises a high-power permanent magnet motor (1) which is connected with a wheel hub (8) of a vehicle through a transmission shaft I (5) and a transmission shaft II (7) which are connected with each other through a constant velocity universal joint, wherein a cross coupling (3) is arranged between the high-power permanent magnet motor (1) and the transmission shaft I (5), two ends of the cross coupling (3) are respectively provided with a flange I (2) and a flange II (4), the cross coupling (3) is connected with an output shaft of the high-power permanent magnet motor (1) through the flange I (2), is connected with a transmission shaft I (5) through a flange II (4), a torsional vibration suppression device (6) is arranged between the transmission shaft I (5) and a transmission shaft II (7), an input flange (9) is arranged between the torsional vibration suppression device (6) and the transmission shaft I (5), an output flange (10) is arranged between the torsional vibration suppression device (6) and the transmission shaft II (7),

the torsional vibration suppression device (6) comprises a left shell (6-1) and a right shell (6-2) which are matched with each other and have disc-shaped structures, the left shell (6-1) is connected with the right shell (6-2) through a flange, three fan-shaped grooves are formed in the inner side of the left shell (6-1) at equal intervals, three arc-shaped guide grooves (6-10) are formed between the three fan-shaped grooves respectively, an annular high-tide structure is formed between the fan-shaped grooves and the arc-shaped guide grooves (6-10), step surfaces (6-11) are arranged at the joints of the three arc-shaped guide grooves (6-10) and the three fan-shaped grooves, a transmission module (11) used for compensating the rotation angle difference between the left shell (6-1) and an output flange (10) is arranged between the left shell (6-1) and the right shell (6-2), and the transmission module (11) comprises a transmission connecting piece (6-3), The permanent magnet type coil motor comprises a permanent magnet sleeve I (6-4), a compression spring I (6-5), an annular permanent magnet (6-6), a coil unit (6-7), a permanent magnet sleeve II (6-8) and a compression spring II (6-9), wherein the number of transmission connecting pieces (6-3) is three, each transmission connecting piece (6-3) is arranged on an arc-shaped guide groove (6-10), the arc-shaped guide groove (6-10) is matched with the bottom of the transmission connecting piece (6-3), one side, located on the arc-shaped guide groove (6-10) in a left shell (6-1), of each transmission connecting piece (6-3) is provided with the permanent magnet sleeve I (6-4), the other side is provided with the permanent magnet sleeve II (6-8), and the permanent magnet sleeve II (6-8) and the permanent magnet sleeve I (6-4) are completely identical in structure, bosses (6-12) are arranged at the end parts of the permanent magnet sleeve I (6-4) and the permanent magnet sleeve II (6-8), the positions of the bosses (6-12) are matched with step surfaces (6-11), three transmission connecting pieces (6-3) are connected with three annular permanent magnets (6-6) through the permanent magnet sleeve II (6-8) and the end part of the permanent magnet sleeve I (6-4) at two sides, so that the three transmission connecting pieces (6-3) and the three annular permanent magnets (6-6) form an annular structure, a compression spring I (6-5) is arranged on the permanent magnet sleeve I (6-4), a compression spring II (6-9) is arranged on the permanent magnet sleeve II (6-8), and three coil units (6-7) are respectively arranged on the annular permanent magnets (6-6), the coil units (6-7) are wound on the annular permanent magnet (6-6) formed by silicon steel sheets, the three coil units (6-7) are wound by one lead, and the silicon steel sheets of the annular permanent magnet (6-6) are fixed on the left shell (6-1); the right shell (6-2) is provided with three hollows matched with the positions of the transmission connecting pieces (6-3), the hollows allow the transmission connecting pieces (6-3) to move in the hollows so as to realize the compensation of the rotation angle difference, and the end parts of the parts, extending out of the hollows, of the transmission connecting pieces (6-3) are in screw connection with the output flange (10), so that an elastic allowance for compensating the rotation angle difference exists between the left shell (6-1) and the output flange (10).

2. The wheel-side permanent-magnet direct-drive transmission device with the active torsional vibration suppression function as claimed in claim 1, is characterized in that: the permanent magnet sleeve I (6-4) and the permanent magnet sleeve II (6-8) are provided with connecting holes (6-13) on the planes, when the annular permanent magnet (6-6), the permanent magnet sleeve I (6-4) and the permanent magnet sleeve II (6-8) are matched and connected to form an annular structure, two end faces of the annular permanent magnet (6-6) are in contact with the bottom faces of the connecting holes (6-13) on the permanent magnet sleeve II (6-8) and the permanent magnet sleeve I (6-4).

3. The wheel-side permanent-magnet direct-drive transmission device with the active torsional vibration suppression function as claimed in claim 1, is characterized in that: when the annular permanent magnet (6-6), the permanent magnet sleeve I (6-4) and the permanent magnet sleeve II (6-8) are assembled, the compression spring I (6-5) arranged on the permanent magnet sleeve I (6-4) and the compression spring II (6-9) arranged on the permanent magnet sleeve II (6-8) are in a compression state with a certain allowance, so that the transmission connecting piece (6-3) is provided with a certain movement allowance in the arc-shaped guide groove (6-10).

4. The wheel-side permanent-magnet direct-drive transmission device with the active torsional vibration suppression function as claimed in claim 1, is characterized in that: the permanent magnet sleeve I (6-4), the permanent magnet sleeve II (6-8) and the arc-shaped guide groove (6-10) in the left shell (6-1) are installed and matched through a graphite steel sleeve bearing with an arc-shaped structure.

5. The wheel-side permanent-magnet direct-drive transmission device with the active torsional vibration suppression function as claimed in claim 1, is characterized in that: the high-power permanent magnet motor (1) is connected with an angle encoder I, the hub (8) is connected with an angle encoder II, the angle encoder I and the angle encoder II are sequentially connected with a power supply module (15) through a data acquisition card (12), a signal processing module (13) and a D/A conversion module (16), and the power supply module (15) supplies direct current to coils in the coil units (6-7).

6. The wheel-side permanent-magnet direct-drive transmission device with the active torsional vibration suppression function as claimed in claim 1, is characterized in that: the high-power permanent magnet motor (1) of the wheel-side driving permanent magnet direct-drive transmission device (17) is arranged below a supporting arm (18) of a vehicle bottom disc, the supporting arm (18) is connected with a supporting plate (19), a suspension system (20) is connected below the supporting plate (19), two groups of shock absorbers in the suspension system (20) penetrate through a supporting frame (21) to support the suspension system (20), and the supporting frame (21) is connected with a transmission shaft II (7) in the wheel-side driving permanent magnet direct-drive transmission device (17) through a bearing.

7. An operating method of the wheel-side permanent-magnet direct-drive transmission device with the torsional vibration active suppression function, which is characterized by comprising the following steps:

step 1, a wheel-side driving permanent magnet direct-drive transmission device (17) is installed on a chassis of a passenger car through a vehicle suspension system, and a high-power permanent magnet motor (1) is installed above the suspension system through a supporting arm (18) and a supporting plate (19), so that unsprung mass is reduced;

step 2, an angle encoder I and an angle encoder II are respectively arranged on the high-power permanent magnet motor (1) and the hub (8), output signals of the angle encoder I and the angle encoder II are collected by a data collection card (12), and a rotation angle value of the high-power permanent magnet motor (1) and a rotation angle value of the hub (8) are obtained through a signal processing module (13);

step 3, the transmission shaft II (7) is connected with the hub (8) through a constant-speed universal joint, and the rotating speeds of the transmission shaft II (7) and the hub are the same, so that the rotating angle of a transmission connecting piece (6-3) fixedly connected with the transmission shaft II (7) through the output flange (10) is equal to the rotating angle of the hub (8); fixing a left shell (6-1) of the torsional vibration suppression device (6), supplying direct current with linearly changing magnitude to a coil unit (6-7) through a power supply module (15), detecting the rotation angle of any transmission connecting piece (6-3) in real time through an angle encoder II, drawing a relation curve of an input current value and the rotation angle of the transmission connecting piece (6-3), and obtaining a linear algebraic relation of the input current value and the rotation angle of the transmission connecting piece (6-3) through least square data fitting;

step 4, utilizing the elastic connection between the left shell (6-1) and the output flange (10) to transfer the torsional vibration of the transmission shaft I (5) and the transmission shaft II (7); when the motor drives the transmission shaft I, because the output flange (10) is connected with the transmission connecting piece (6-3), a rotation angle difference is generated between the left shell (6-1) and the output flange (10), the transmission connecting piece (6-3) can move in the left shell (6-1), the rotation angle of the output shaft of the high-power permanent magnet motor (1) is taken as an expected rotation angle value, an instantaneous rotation angle value of the hub (8) is obtained by using the signal processing module (13), the difference value between the expected rotation angle value and the instantaneous rotation angle value is calculated, the control module (14) is constructed based on the linear algebraic relation between the input current value in the step (3) and the rotation angle of the transmission connecting piece (6-3), the input current value of the coil unit (6-7) is obtained through the difference value operation, and the D/A conversion module (16) drives the power supply module (15) to control the coil unit (6-7) to generate an induction magnetic field, interacts with the inherent magnetic field of the annular permanent magnet (6-6) to generate electromagnetic acting force to drive the transmission connecting piece (6-3) to move and compensate the rotation angle difference between the left shell (6-1) and the output flange (10), a specific coil unit (6-7) is fixed relative to the left shell (6-1), the electromagnetic acting force is generated between the coil unit (6-7) and the annular permanent magnet (6-6) to enable the annular permanent magnet (6-6) to rotate relative to the left shell (6-1), the annular permanent magnet (6-6) pushes a permanent magnet sleeve II (6-8) and then pushes the transmission connecting piece (6-3) to move, the relative rotation of the left shell (6-1) and the output flange (10) is finally realized, the torsional vibration of the wheel-side driving permanent magnet direct drive transmission system is inhibited by utilizing the torsional vibration inhibiting device (6), at the same time, a sufficient drive torque of the hub (8) is ensured.

Technical Field

The invention relates to a wheel-side permanent-magnet direct-drive transmission device and a working method, in particular to a wheel-side permanent-magnet direct-drive transmission device with a torsional vibration active suppression function and a working method, which are suitable for an electric motor coach.

Background

With the continuous push of the public transport priority strategy in China, the electric public transport bus gets more and more attention. The wheel driving configuration is the perfect combination of electric driving and vehicle transmission technology, can effectively reduce the unsprung mass of a wheel hub driving mode, and is particularly suitable for electric buses. In the existing stage, the wheel-side driving transmission system needs to use a speed reducer for transmission, so that the purposes of reducing speed and increasing torque are achieved, the speed reducer is a weak link of the transmission mode, various faults are easy to occur, and the stability of the wheel-side driving transmission system is reduced.

In recent years, with the further development of the preparation process of the permanent magnetic material and the alternating current variable frequency speed regulation technology, the permanent magnetic direct drive transmission mode is more and more applied. The wheel-side driving permanent magnet direct-drive transmission system is combined with a high-power permanent magnet motor, and is constructed on an electric bus, so that the use of a transmission weak link reducer can be effectively avoided, and the wheel-side driving permanent magnet direct-drive transmission system has the advantages of high transmission efficiency and high reliability. However, in a specific driving process, the wheel-side driving permanent magnet direct-drive transmission system faces new challenges, mainly, the bus driving condition is complex, and under the combined action of complex disturbance of the complex driving condition and electromechanical coupling transmission excitation of the permanent magnet motor, a system transmission shaft is easy to generate torsional vibration, even torsional fracture and failure. Therefore, to ensure reliable application of the wheel-side driving permanent-magnet direct-drive transmission system in the electric public transport bus, firstly, the torsional vibration of the system needs to be effectively inhibited. Chinese patent CN201810390723.5 discloses a torsional vibration damper for automobile driving shaft, which utilizes an elastic energy storage body and an inertia body on the device to suppress torsional vibration of the automobile driving shaft passing through the damper, but as described in the patent, the design is essentially a passive suppression scheme, and the fine tuning of the mass and frequency of the damper is realized by changing the formula of the rubber material used by the elastic energy storage body, so the scheme has the problems of poor vibration suppression frequency adjustability and limited vibration suppression effect, and the torsional rigidity of the connecting part of the engine crankshaft and the transmission system is reduced, which has a certain influence on the driving force of the system.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a wheel-side permanent-magnet direct-drive transmission device with a torsional vibration active suppression function and a working method thereof, which adopt an active adjustment mode to overcome the problem of multi-frequency torsional vibration suppression of a wheel-side driving permanent-magnet direct-drive transmission system and improve the support for the efficient and reliable application of the wheel-side driving permanent-magnet direct-drive transmission system on an electric bus.

In order to achieve the purpose, the wheel-side permanent-magnet direct-drive transmission device with the torsional vibration active suppression function comprises a high-power permanent-magnet motor, a transmission shaft I and a transmission shaft II which are connected with each other, and a wheel hub of a vehicle through a constant-speed universal joint, wherein a cross coupling is arranged between the high-power permanent-magnet motor and the transmission shaft I, two ends of the cross coupling are respectively provided with a flange I and a flange II, the cross coupling is connected with an output shaft of the high-power permanent-magnet motor through the flange I and is connected with the transmission shaft I through the flange II, a torsional vibration suppression device is arranged between the transmission shaft I and the transmission shaft II, an input flange is arranged between the torsional vibration suppression device and the transmission shaft I, an output flange is arranged between the torsional vibration suppression device and the transmission shaft II,

the torsional vibration suppression device comprises a left shell and a right shell which are matched with each other and have disc structures, the left shell and the right shell are connected through a flange, three fan-shaped grooves are formed in the inner side of the left shell at equal intervals, three arc-shaped guide grooves are formed among the three fan-shaped grooves respectively, the fan-shaped grooves and the arc-shaped guide grooves form an annular high-tide structure, step surfaces are arranged at the joints of the three arc-shaped guide grooves and the three fan-shaped grooves, a transmission module used for compensating the rotation angle difference between the left shell and an output flange is arranged between the left shell and the right shell, the transmission module comprises a transmission connecting piece, a permanent magnet sleeve I, a compression spring I, an annular permanent magnet, a coil unit, a permanent magnet sleeve II and a compression spring II, wherein the number of the transmission connecting pieces is three, each transmission connecting piece is arranged on the arc-shaped guide groove, the arc-shaped guide grooves are matched with the bottoms of the transmission connecting pieces, and one side, positioned in the left shell, of the arc-shaped guide grooves is provided with the permanent magnet sleeve I, the other side of the permanent magnet sleeve is provided with a permanent magnet sleeve II, the structures of the permanent magnet sleeve II and the permanent magnet sleeve I are completely the same, the end parts of the permanent magnet sleeve I and the permanent magnet sleeve II are provided with bosses, the positions of the bosses are matched with the step surfaces, the three transmission connecting pieces are connected with three annular permanent magnets through the permanent magnet sleeve II and the end part of the permanent magnet sleeve I on the two sides, so that the three transmission connecting pieces and the three annular permanent magnets form an annular structure, the permanent magnet sleeve I is provided with a compression spring I, the permanent magnet sleeve II is provided with a compression spring II, the annular permanent magnets are respectively provided with three coil units, the coil units are wound on the annular permanent magnets formed by silicon steel sheets, the three coil units are formed by winding a lead, and the silicon steel sheets of the annular permanent magnets are fixed on the left shell; the right shell is provided with three hollows matched with the positions of the transmission connecting pieces, the hollows allow the transmission connecting pieces to move in the transmission connecting pieces so as to realize the compensation of the cross-over difference, and the end parts of the extending parts of the transmission connecting pieces in the hollows are connected with the output flange through screws, so that an elastic allowance for compensating the difference of the rotation angles exists between the left shell and the output flange.

The permanent magnet sleeve I and the permanent magnet sleeve II are provided with connecting holes on the planes, and when the annular permanent magnet is matched and connected with the permanent magnet sleeve I and the permanent magnet sleeve II to form an annular structure, two end faces of the annular permanent magnet are contacted with the bottom surfaces of the connecting holes on the permanent magnet sleeve II and the permanent magnet sleeve I.

When the annular permanent magnet is assembled with the permanent magnet sleeve I and the permanent magnet sleeve II, the compression spring I arranged on the permanent magnet sleeve I and the compression spring II arranged on the permanent magnet sleeve II are in a compression state with a certain residual amount, so that the transmission connecting piece has a certain movement residual amount in the arc-shaped guide groove.

The permanent magnet sleeve I, the permanent magnet sleeve II and the arc-shaped guide groove in the left shell are installed and matched through graphite steel sleeve bearings of arc structures.

The high-power permanent magnet motor is connected with an angle encoder I, the hub is connected with an angle encoder II, the angle encoder I and the angle encoder II are sequentially connected with a power module through a data acquisition card, a signal processing module and a D/A conversion module, and the power module supplies direct current to a coil in the coil unit.

The high-power permanent magnet motor of the wheel-side driving permanent magnet direct-drive transmission device is arranged below a supporting arm of a vehicle bottom disc, the supporting arm is connected with a supporting plate, a suspension system is connected to the lower portion of the supporting plate, two groups of shock absorbers in the suspension system penetrate through the supporting frame to support the suspension system, and the supporting frame is connected with a transmission shaft II in the wheel-side driving permanent magnet direct-drive transmission device through a bearing.

A working method of a wheel-side permanent magnet direct-drive transmission device with a torsional vibration active suppression function comprises the following steps:

step 1, a wheel-side driving permanent magnet direct-drive transmission device is installed on a chassis of a passenger car through a vehicle suspension system, and a high-power permanent magnet motor is installed above the suspension system through a supporting arm and a supporting plate, so that unsprung mass is reduced;

step 2, an angle encoder I and an angle encoder II are respectively arranged on the high-power permanent magnet motor and the hub, output signals of the angle encoder I and the angle encoder II are collected by a data acquisition card, and a rotation angle value of the high-power permanent magnet motor and a rotation angle value of the hub are obtained through a signal processing module;

step 3, the transmission shaft II is connected with the hub through the constant-speed universal joint, and the rotating speeds of the transmission shaft II and the hub are the same, so that the rotating angle of a transmission connecting piece fixedly connected with the transmission shaft II through the output flange is equal to the rotating angle of the hub; fixing a left shell of the torsional vibration suppression device, electrifying direct current with linearly changing magnitude to a coil unit through a power supply module, detecting the rotation angle of any transmission connecting piece in real time through an angle encoder II, drawing a relation curve of an input current value and the rotation angle of the transmission connecting piece, and obtaining a linear algebraic relation of the input current value and the rotation angle of the transmission connecting piece through least square data fitting;

step 4, transferring torsional vibration of the transmission shaft I and the transmission shaft II by utilizing elastic connection between the left shell and the output flange; when the motor drives the transmission shaft I, because the output flange is connected with the transmission connecting piece, a rotation angle difference is generated between the left shell and the output flange, the transmission connecting piece can move in the left shell, the rotation angle of the output shaft of the high-power permanent magnet motor is taken as an expected rotation angle value, the instantaneous rotation angle value of the wheel hub is obtained by utilizing the signal processing module, the difference value between the expected rotation angle value and the instantaneous rotation angle value is calculated, the control module is constructed based on the linear algebraic relation between the input current value and the rotation angle of the transmission connecting piece in the step 3, the input current value of the coil unit is obtained through difference value operation, the D/A conversion module drives the power supply module to control the coil unit to generate an induction magnetic field which interacts with the inherent magnetic field of the annular permanent magnet to generate electromagnetic acting force to drive the transmission connecting piece to move and compensate the rotation angle difference between the left shell and the output flange, and the specific coil unit is fixed relative to the left shell, an electromagnetic acting force is generated between the coil unit and the annular permanent magnet, so that the annular permanent magnet rotates relative to the left shell, the annular permanent magnet pushes the permanent magnet sleeve II, then the transmission connecting piece is pushed to move, finally, the relative rotation of the left shell and the output flange is realized, the torsional vibration of the wheel-side driving permanent magnet direct-drive transmission system is restrained by the torsional vibration restraining device, and meanwhile, the enough driving torque of the wheel hub is guaranteed.

Has the advantages that: the invention utilizes the interaction of the electromagnetic force generated by the electrified solenoid and the annular permanent magnet to actively compensate the torsional vibration of the system transmission link, inhibits the transmission of the impact vibration borne by the hub to the system transmission shaft, and realizes the electromagnetic force controllability of the electrified solenoid by controlling the current so as to effectively ensure the driving force of the hub; the torsional vibration suppression device can be connected with the existing electric motor coach transmission system through the flange, and has wide application range and strong transportability.

Drawings

FIG. 1 is a schematic structural diagram of a wheel-side permanent-magnet direct-drive transmission device with a torsional vibration active suppression function according to the present invention;

FIG. 2 is a schematic view of a left housing of the torsional vibration suppression apparatus of the present invention;

FIG. 3 is a schematic view of the connection between the transmission module and the left housing in the torsional vibration suppression apparatus according to the present invention;

FIG. 4 is a schematic view of the coupling of three sets of transmission modules in the torsional vibration suppression apparatus of the present invention;

FIG. 5 is a schematic view of the torsional vibration suppression apparatus of the present invention coupled to an input flange and an output flange;

FIG. 6 is a schematic view of an embodiment of a wheel-side permanent-magnet direct-drive transmission device with a torsional vibration active suppression function according to the present invention;

fig. 7 is a control flow diagram of the wheel-side permanent-magnet direct-drive transmission device with the torsional vibration active suppression function according to the invention.

In the figure: 1-high-power permanent magnet motor, 2-flange I, 3-cross coupling, 4-flange II, 5-transmission shaft I, 6-torsional vibration suppression device, 6-1-left shell, 6-2-right shell, 6-3-transmission connecting piece, 6-4-permanent magnet sleeve I, 6-5-compression spring I, 6-annular permanent magnet, 6-7-coil unit, 6-8-permanent magnet sleeve II, 6-9-compression spring II, 6-10-arc guide slot, 6-11-step surface, 6-12-boss, 6-13-connecting hole, 7-transmission shaft II, 8-hub, 9-input flange, 10-output flange, 11-transmission module, 12-data acquisition card, 13-signal processing module, 14-control module, 15-driving power supply module, 16-D/A conversion module, 17-wheel edge driving permanent magnetic direct drive transmission device, 18-supporting arm, 19-supporting plate, 20-suspension system, 21-supporting frame.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings;

as shown in figure 1, the wheel-side permanent-magnet direct-drive transmission device with the torsional vibration active suppression function comprises a high-power permanent-magnet motor 1, a transmission shaft I5 and a transmission shaft II 7 which are connected with each other, and a wheel hub 8 of a vehicle through a constant-speed universal joint, wherein a cross coupling 3 is arranged between the high-power permanent-magnet motor 1 and the transmission shaft I5, two ends of the cross coupling 3 are respectively provided with a flange I2 and a flange II 4, the cross coupling 3 is connected with an output shaft of the high-power permanent-magnet motor 1 through the flange I2 and is connected with the transmission shaft I5 through the flange II 4, a torsional vibration suppression device 6 is arranged between the transmission shaft I5 and the transmission shaft II 7, an input flange 9 is arranged between the torsional vibration suppression device 6 and the transmission shaft I5 for connection, and an output flange 10 is arranged between the torsional vibration suppression device 6 and the transmission shaft II 7,

as shown in fig. 2 and 3, the torsional vibration suppression device 6 includes a left housing 6-1 and a right housing 6-2 which are matched with each other and have a disc-shaped structure, the left housing 6-1 is connected with the right housing 6-2 through a flange, wherein three fan-shaped grooves are arranged at equal intervals on the inner side of the left housing 6-1, three arc-shaped guide grooves 6-10 are respectively arranged between the three fan-shaped grooves, the fan-shaped grooves and the arc-shaped guide grooves 6-10 form an annular high-tide structure, step surfaces 6-11 are arranged at the joints of the three arc-shaped guide grooves 6-10 and the three fan-shaped grooves, a transmission module 11 for compensating the rotation angle difference between the left housing 6-1 and the output flange 10 is arranged between the left housing 6-1 and the right housing 6-2, and the transmission module 11 includes a transmission connecting piece 6-3, a permanent magnet sleeve i 6-4, and a permanent magnet sleeve i, The permanent magnet synchronous motor comprises a compression spring I6-5, an annular permanent magnet 6-6, a coil unit 6-7, a permanent magnet sleeve II 6-8 and a compression spring II 6-9, wherein three transmission connecting pieces 6-3 are provided, each transmission connecting piece 6-3 is arranged on an arc-shaped guide groove 6-10, the arc-shaped guide grooves 6-10 are matched with the bottoms of the transmission connecting pieces 6-3, one side, located in the arc-shaped guide groove 6-10 in a left shell 6-1, of each transmission connecting piece 6-3 is provided with a permanent magnet sleeve I6-4, the other side of each transmission connecting piece is provided with a permanent magnet sleeve II 6-8, the permanent magnet sleeves II 6-8 and the permanent magnet sleeves I6-4 are completely identical in structure, the end parts of the permanent magnet sleeves I6-4 and the permanent magnet sleeves II 6-8 are provided with bosses 6-12, and the positions of the bosses 6-12 are matched with step surfaces 6-11, the three transmission connecting pieces 6-3 are connected with three annular permanent magnets 6-6 through the permanent magnet sleeves II 6-8 and the permanent magnet sleeves I6-4 at two sides, so that the three transmission connecting pieces 6-3 and the three annular permanent magnets 6-6 form an annular structure, a compression spring I6-5 is arranged on the permanent magnet sleeve I6-4, a compression spring II 6-9 is arranged on the permanent magnet sleeve II 6-8, three coil units 6-7 are respectively arranged on the annular permanent magnets 6-6, the coil units 6-7 are wound on the annular permanent magnets 6-6 formed by silicon steel sheets, the three coil units 6-7 are formed by winding a lead, and the silicon steel sheets of the annular permanent magnets 6-6 are fixed on the left shell 6-1; the right shell 6-2 is provided with three hollows matched with the positions of the transmission connecting pieces 6-3, the hollows allow the transmission connecting pieces 6-3 to move in the hollows so as to realize the compensation of the rotation angle difference, and the end parts of the parts, extending out of the hollows, of the transmission connecting pieces 6-3 are in screw connection with the output flange 10, so that an elastic allowance for compensating the rotation angle difference exists between the left shell 6-1 and the output flange 10.

As shown in fig. 4 and 5, the permanent magnet sleeve i 6-4 and the permanent magnet sleeve ii 6-8 are provided with coupling holes 6-13 on the plane, and when the annular permanent magnet 6-6 is connected with the permanent magnet sleeve i 6-4 and the permanent magnet sleeve ii 6-8 in a matching manner to form an annular structure, two end faces of the annular permanent magnet 6-6 are in contact with the bottom surfaces of the coupling holes 6-13 on the permanent magnet sleeve ii 6-8 and the permanent magnet sleeve i 6-4. When the annular permanent magnet 6-6, the permanent magnet sleeve I6-4 and the permanent magnet sleeve II 6-8 are assembled, the compression spring I6-5 arranged on the permanent magnet sleeve I6-4 and the compression spring II 6-9 arranged on the permanent magnet sleeve II 6-8 are in a compression state with a certain allowance, so that the transmission connecting piece 6-3 is provided with a certain movement allowance in the arc-shaped guide groove 6-10. The permanent magnet sleeve I6-4, the permanent magnet sleeve II 6-8 and the arc-shaped guide groove 6-10 in the left shell 6-1 are installed and matched through a graphite steel sleeve bearing with an arc-shaped structure.

As shown in fig. 7, the high-power permanent magnet motor 1 is connected to an angle encoder i, the hub 8 is connected to an angle encoder ii, the angle encoder i and the angle encoder ii are sequentially connected to a power module 15 through a data acquisition card 12, a signal processing module 13 and a D/a conversion module 16, and the power module 15 supplies direct current to the coils in the coil units 6 to 7.

As shown in fig. 6, the high-power permanent magnet motor 1 of the wheel-side driving permanent magnet direct-drive transmission device 17 is arranged below a supporting arm 18 of a vehicle bottom disc, the supporting arm 18 is connected with a supporting plate 19, a suspension system 20 is connected below the supporting plate 19, two sets of shock absorbers in the suspension system 20 penetrate through a supporting frame 21 to support the suspension system 20, and the supporting frame 21 is connected with a transmission shaft ii 7 in the wheel-side driving permanent magnet direct-drive transmission device 17 through a bearing.

A working method of a wheel-side permanent magnet direct-drive transmission device with a torsional vibration active suppression function comprises the following steps:

step 1, a wheel-side driving permanent magnet direct-drive transmission device 17 is installed on a chassis of a passenger car through a vehicle suspension system, and a high-power permanent magnet motor 1 is installed above the suspension system through a supporting arm 18 and a supporting plate 19, so that unsprung mass is reduced;

step 2, an angle encoder I and an angle encoder II are respectively arranged on the high-power permanent magnet motor 1 and the hub 8, output signals of the angle encoder I and the angle encoder II are collected by a data acquisition card 12, and a rotation angle value of the high-power permanent magnet motor 1 and a rotation angle value of the hub 8 are obtained through a signal processing module 13;

step 3, the transmission shaft II 7 is connected with the hub 8 through a constant-speed universal joint, and the rotating speeds of the transmission shaft II 7 and the hub 8 are the same, so that the rotating angle of a transmission connecting piece 6-3 fixedly connected with the transmission shaft II 7 through the output flange 10 is equal to the rotating angle of the hub 8; fixing a left shell 6-1 of the torsional vibration suppression device 6, supplying direct current with linearly changing magnitude to a coil unit 6-7 through a power supply module 15, detecting the rotation angle of any transmission connecting piece 6-3 in real time through an angle encoder II, drawing a relation curve of an input current value and the rotation angle of the transmission connecting piece 6-3, and obtaining a linear algebraic relation of the input current value and the rotation angle of the transmission connecting piece 6-3 through least square data fitting;

step 4, utilizing the elastic connection between the left shell 6-1 and the output flange 10 to transfer the torsional vibration of the transmission shaft I5 and the transmission shaft II 7; when the motor drives the transmission shaft I, because the output flange 10 is connected with the transmission connecting piece 6-3, a rotation angle difference is generated between the left shell 6-1 and the output flange 10, the transmission connecting piece 6-3 can move in the left shell 6-1, the rotation angle of the output shaft of the high-power permanent magnet motor 1 is taken as an expected rotation angle value, an instantaneous rotation angle value of the hub 8 is obtained by utilizing the signal processing module 13, the difference value between the expected rotation angle value and the instantaneous rotation angle value is calculated, the control module 14 is constructed based on the linear algebraic relation between the input current value in the step 3 and the rotation angle of the transmission connecting piece 6-3, the input current value of the coil unit 6-7 is obtained through difference value operation, the D/A conversion module 16 drives the power supply module 15 to control the coil unit 6-7 to generate an induction magnetic field which interacts with the inherent magnetic field of the annular permanent magnet 6-6, the electromagnetic force is generated to drive the transmission connecting piece 6-3 to move, the rotation angle difference between the left shell 6-1 and the output flange 10 is compensated, the specific coil unit 6-7 is fixed relative to the left shell 6-1, the electromagnetic force is generated between the coil unit 6-7 and the annular permanent magnet 6-6 to enable the annular permanent magnet 6-6 to rotate relative to the left shell 6-1, the annular permanent magnet 6-6 pushes the permanent magnet sleeve II 6-8 and then pushes the transmission connecting piece 6-3 to move, the relative rotation of the left shell 6-1 and the output flange 10 is finally realized, the torsional vibration of the wheel edge driving permanent magnet direct drive transmission system is restrained by the torsional vibration restraining device 6, and meanwhile, the enough driving torque of the wheel hub 8 is ensured.