Dual mass flywheel based on electromagnetic control variable inertia

Abstract

The application discloses a double-mass flywheel based on electromagnetic control variable inertia, which comprises a primary flywheel, a starting gear ring, an arc spring, a force transmission plate, a secondary flywheel, a pressure plate, an electromagnetic device and a cover plate, the starting gear ring is spot-welded with the outer circumference of the primary flywheel, the arc spring is installed in the arc-shaped groove in the inner cavity of one side of the primary flywheel, the force transmission plate is connected with the secondary flywheel through screws, the electromagnetic device is installed in the radial groove on the other side of the primary flywheel, the cover plate is connected with the primary flywheel through screws, and one end of the pressure plate penetrates through the central through hole of the secondary flywheel and is connected with the primary flywheel through screws. When the double-mass flywheel works, the inertia of rotation of the primary flywheel, the inertia ratio of rotation of the primary flywheel and the secondary flywheel and the inherent frequency characteristics of the automobile transmission system in the double-mass flywheel are changed by controlling the current size of the input electromagnetic device under different rotating speeds, so that the damping effect of the double-mass flywheel on the torsional vibration of the automobile transmission system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a torsional vibration damper for a vehicle, in particular to a dual-mass flywheel based on electromagnetic control variable inertia. BACKGROUND

[0002] Due to excellent damping performance, the dual-mass flywheel is widely used in the vehicle transmission system. Compared with the clutch driven disc type torsional vibration damper, the dual-mass flywheel has a larger relative torsional angle and a smaller elastic element stiffness, and the installation space of the elastic element is not limited by the size of the clutch friction plate. The dual-mass flywheel can not only output large torque, but also further reduce the low-order natural frequency of the system, so that the low-order resonance speed of the system is lower than the engine idle speed.

[0003] The current dual-mass flywheel product cannot flexibly match various vehicle transmission systems, or it is difficult to further suppress torsional vibration by adjusting the stiffness and damping parameters. The introduction of variable rotational inertia technology in the dual-mass flywheel can further effectively suppress the torsional vibration of the vehicle transmission system, reduce noise, and improve the comfort and service life of the vehicle. However, the existing variable inertia dual-mass flywheel has defects such as poor flexibility of rotational inertia adjustment or single adjustment mode. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a dual-mass flywheel based on electromagnetic control variable inertia. The electromagnetic technology is applied to the dual-mass flywheel. When the dual-mass flywheel is working, the size of the current input into the copper coil is controlled to change the electromagnetic force acting on the second permanent magnet at different speeds. Under the combined action of centrifugal force and spring force, the radial position of the second permanent magnet in the primary flywheel is adjusted, so as to control the rotational inertia of the primary flywheel in the dual-mass flywheel, the rotational inertia ratio of the primary flywheel and the secondary flywheel, change the natural frequency characteristics of the vehicle transmission system, and improve the damping effect of the dual-mass flywheel on the torsional vibration of the vehicle transmission system.

[0005] The present application is realized by the following technical solutions:

[0006] A dual-mass flywheel based on electromagnetic control variable inertia is composed of a primary flywheel 1, a start gear ring 2, an arc spring 3, a transmission plate 4, a secondary flywheel 5, a pressure plate 6, a magnetic yoke 7, a first permanent magnet 8, a copper coil 9, a second permanent magnet 10, a shell cover 11, a shell body 12, an inner linear spring 13, an outer linear spring 14, a connecting plate 15, and a cover plate 16.

[0007] The starting gear ring 2 and the outer circle of the primary flywheel 1 are assembled and spot welded together, the primary flywheel 1 has two symmetrical arc-shaped grooves in the inner cavity, and two bosses are arranged in the arc-shaped grooves, the arc-shaped spring 3 is installed in the arc-shaped groove in the inner cavity of the primary flywheel 1, the primary flywheel 1 has a through hole at the center axis, and the primary flywheel 1 is uniformly provided with six threaded holes on the side facing the secondary flywheel 5, and the primary flywheel 1 is symmetrically distributed with fourteen threaded holes on the side away from the secondary flywheel 5, wherein the six threaded holes are connected with the engine crankshaft through screws, and the other eight threaded holes are fixed with the cover plate 16 on the primary flywheel 1 through screws, in addition, the primary flywheel 1 is provided with four radial grooves on the side away from the secondary flywheel 5, and four threaded holes are arranged at both ends of the radial grooves.

[0008] The secondary flywheel 5 is a disc structure, one side of the secondary flywheel 5 is provided with a threaded hole, the threaded hole is connected with the clutch through a screw, the secondary flywheel 5 has a through hole at the center, and six through holes are uniformly arranged around the through hole. The pressing plate 6 is uniformly provided with six through holes, one end of the pressing plate 6 passes through the center through hole of the secondary flywheel 5, and the through hole on the pressing plate 6 is connected with the primary flywheel 1 through a screw, so that the primary flywheel 1 and the secondary flywheel 5 cannot be separated axially.

[0009] The transmission plate 4 is a circular ring structure, the center of the transmission plate 4 is provided with a through hole, and six uniformly distributed threaded holes are arranged around the through hole, the periphery of the transmission plate 4 is symmetrically provided with two outwardly extending side ear plates in the radial direction, and the transmission plate 4 and the secondary flywheel 5 are connected together through screws.

[0010] One end of the arc-shaped spring 3 is in contact with the boss in the inner cavity of the primary flywheel 1, and the other end is in contact with the side surface of the side ear plate of the transmission plate 4, and the torque is transmitted from the primary flywheel 1 to the secondary flywheel 5 through the arc-shaped spring 3 and the transmission plate 4.

[0011] The magnetic yoke 7, the first permanent magnet 8, the copper coil 9, the second permanent magnet 10, the shell cover 11, the shell body 12, the inner layer straight spring 13, the outer layer straight spring 14 and the connecting plate 15 constitute an electromagnetic device, wherein the copper coil 9 is in the form of a cylinder and is arranged in the magnetic yoke 7, the side surface of the magnetic yoke 7 is provided with a through hole for leading out the copper wire of the copper coil 9, and the bottom of the magnetic yoke 7 is uniformly distributed with four through holes, the first permanent magnet 8 is installed at the center of the copper coil 9, the second permanent magnet 10 is fixed in the shell body 12 through the shell cover 11, the shell cover 11 and the shell body 12 are connected through screws, the shell cover 11, the second permanent magnet 10 and the shell body 12 are fixed together and installed in the magnetic yoke 7, one side of the shell body 12 is connected with the inner layer straight spring 13 and the outer layer straight spring 14, the other side of the inner layer straight spring 13 and the outer layer straight spring 14 is connected with the connecting plate 15, the connecting plate 15 is uniformly distributed with four through holes, and the magnetic yoke 7 and the connecting plate 15 are fixed at both ends of the radial groove of the primary flywheel 1 through screws.

[0012] The cover plate 16 is provided with eighteen through holes, eight of which are used to fix the cover plate 16 on the primary flywheel 1 by screws to prevent the electromagnetic device from being separated from the radial groove of the primary flywheel 1, four of which are used to lead out the copper wires of the copper coil 9, and the other six near the central axis are used to fix the primary flywheel 1 with the crankshaft after the screws pass through the through holes.

[0013] In work, the second permanent magnet 10 in the electromagnetic device keeps balance under the joint action of centrifugal force, spring elastic force and electromagnetic force, the electromagnetic force borne by the second permanent magnet 10 is changed by controlling the current size inputted into the copper coil 9, thereby adjusting the radial position of the second permanent magnet 10 in the primary flywheel 1, with the change of the radial position of the second permanent magnet 10 in the primary flywheel 1, the moment of inertia of the primary flywheel 1 also changes, then the moment of inertia ratio of the primary flywheel 1 to the secondary flywheel 5 and the inherent frequency characteristic of the automobile transmission system are adjusted, so as to improve the damping effect of the dual-mass flywheel on the torsional vibration of the automobile transmission system.

[0014] Compared with the prior art, the beneficial effects of the present application are: (1) the moment of inertia of the dual-mass flywheel is actively controlled through the electromagnetic device installed on the primary flywheel, the radial position of the second permanent magnet in the primary flywheel is adjusted by changing the input current size in the copper coil, the moment of inertia of the primary flywheel changes accordingly, the moment of inertia ratio of the primary flywheel to the secondary flywheel and the inherent frequency characteristic of the automobile transmission system also change, and the damping effect of the dual-mass flywheel on the torsional vibration of the automobile transmission system under different excitation frequencies is improved; (2) when the electromagnetic device fails or the copper coil is not powered without current, during the rotation of the dual-mass flywheel, if the speed changes, the second permanent magnet will move radially due to the joint action of centrifugal force, magnetic force and spring elastic force, at this moment, the moment of inertia of the dual-mass flywheel will also change, although the change of the moment of inertia of the dual-mass flywheel in this process is uncontrollable, but this dual-mass flywheel still has the effect of variable inertia and good damping performance; (3) reliable work, simple structure, easy to install and remove. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a two-dimensional diagram of the dual-mass flywheel based on electromagnetic control variable inertia according to the present application;

[0016] Fig. 2 It is a three-dimensional exploded view of the dual-mass flywheel based on electromagnetic control variable inertia according to the present application;

[0017] Fig. 3 It is a three-dimensional view of the dual-mass flywheel based on electromagnetic control variable inertia according to the present application after removing the secondary flywheel;

[0018] Fig. 4A three-dimensional diagram of a primary flywheel in a dual-mass flywheel based on electromagnetic control variable inertia according to the present application;

[0019] Fig. 5 A three-dimensional diagram of a secondary flywheel in a dual-mass flywheel based on electromagnetic control variable inertia according to the present application;

[0020] Fig. 6 A three-dimensional exploded view of an electromagnetic device in a dual-mass flywheel based on electromagnetic control variable inertia according to the present application;

[0021] In the figure: 1-primary flywheel;2-starting gear ring;3-arc spring;4-force plate;5-secondary flywheel;6-pressing disc;7-magnetic yoke;8-first permanent magnet;9-copper coil;10-second permanent magnet;11-outer shell cover;12-outer shell;13-inner layer straight spring;14-outer layer straight spring;15-connection plate;16-cover plate. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the present application, the concept and specific structure of the present application are described in detail below in combination with the drawings.

[0023] In the description of the present application, it should be noted that the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. The terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection;It can be mechanical connection, or it can be electrical connection;It can be directly connected, or it can be indirectly connected through intermediate medium. It can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The present application applies electromagnetic technology to dual-mass flywheel, and proposes a dual-mass flywheel based on electromagnetic control variable inertia, which realizes active control of the rotational inertia of dual-mass flywheel, attenuates torsional vibration from the engine, and meets the normal damping requirements in a larger frequency range at the torsional excitation of the automobile transmission system.

[0025] As Figs. 1-3As shown, the starting gear ring 2 and the outer circle of the primary flywheel 1 are assembled and spot welded together, the inner cavity of the primary flywheel 1 has two symmetrical arc-shaped grooves, and two bosses are arranged in the arc-shaped grooves, the arc-shaped spring 3 is installed in the arc-shaped groove of the inner cavity of the primary flywheel 1, the center axis of the primary flywheel 1 has a through hole, the primary flywheel 1 is uniformly provided with six threaded holes on the side facing the secondary flywheel 5, and the primary flywheel 1 is symmetrically distributed with fourteen threaded holes on the side away from the secondary flywheel 5, wherein the six threaded holes are connected with the engine crankshaft through screws, and the other eight threaded holes are fixed with the cover plate 16 on the primary flywheel 1 through screws, in addition, the primary flywheel 1 is provided with four radial grooves on the side away from the secondary flywheel 5, and four threaded holes are arranged at both ends of the radial grooves.

[0026] The secondary flywheel 5 is a disc structure, one side of the secondary flywheel 5 is provided with a threaded hole, the threaded hole is connected with the clutch through a screw, the secondary flywheel 5 has a through hole in the center, and six through holes are uniformly arranged around the secondary flywheel 5, the pressure plate 6 is uniformly provided with six through holes, one end of the pressure plate 6 passes through the center through hole of the secondary flywheel 5, and the through hole on the pressure plate 6 is connected with the primary flywheel 1 through a screw, so that the primary flywheel 1 and the secondary flywheel 5 cannot be separated axially.

[0027] As shown in the figure Figs. 1-3 The force transmission plate 4 is a circular ring structure, the center of the force transmission plate 4 is provided with a through hole, and six uniformly distributed threaded holes are arranged around the through hole, the periphery of the force transmission plate 4 is symmetrically provided with two outwardly extending side ear plates in the radial direction, and the force transmission plate 4 and the secondary flywheel 5 are connected together through screws.

[0028] One end of the arc-shaped spring 3 is in contact with the boss in the inner cavity of the primary flywheel 1, and the other end is in contact with the side surface of the side ear plate of the force transmission plate 4, so as to transmit torque from the primary flywheel 1 to the force transmission plate 4 and the secondary flywheel 5.

[0029] As shown in the figure Fig. 6As shown, the electromagnetic device is composed of the magnetic yoke 7, the first permanent magnet 8, the copper coil 9, the second permanent magnet 10, the cover 11, the housing 12, the inner linear spring 13, the outer linear spring 14 and the connecting plate 15. The copper coil 9 is cylindrical and arranged in the magnetic yoke 7. The magnetic yoke 7 is provided with a through hole on the side surface for leading out the copper wire of the copper coil 9, and four through holes are uniformly distributed on the bottom of the magnetic yoke 7. The first permanent magnet 8 is installed at the center of the copper coil 9. The second permanent magnet 10 is fixed in the housing 12 through the cover 11. The cover 11 and the housing 12 are connected by screws. The cover 11, the second permanent magnet 10 and the housing 12 are fixed together and installed in the magnetic yoke 7. One side of the housing 12 is connected with the inner linear spring 13 and the outer linear spring 14, and the other side of the inner linear spring 13 and the outer linear spring 14 is connected with the connecting plate 15. Four through holes are uniformly distributed on the connecting plate 15. The magnetic yoke 7 and the connecting plate 15 are fixed at both ends of the radial groove of the primary flywheel 1 by screws.

[0030] Eighteen through holes are provided on the cover plate 16. Eight of the through holes are used to fix the cover plate 16 on the primary flywheel 1 by screws to prevent the electromagnetic device from moving in the radial groove. Four of the through holes are used to lead out the copper wire of the copper coil 9. The other six through holes close to the central axis are used for fixing the primary flywheel 1 with the crankshaft after the screws pass through the through holes.

[0031] In operation, the second permanent magnet 10 in the electromagnetic device is kept in balance under the combined action of centrifugal force, spring elastic force and electromagnetic force. At different rotational speeds, the electromagnetic force acting on the second permanent magnet 10 is changed by controlling the current size input to the copper coil 9 in the electromagnetic device, and the radial position of the second permanent magnet 10 in the primary flywheel 1 is adjusted under the combined action of centrifugal force and spring force, so as to control the rotational inertia size of the primary flywheel 1 in the dual-mass flywheel, the rotational inertia ratio of the primary flywheel 1 to the secondary flywheel 5, change the inherent frequency characteristics of the automobile transmission system, and thus improve the control effect of the dual-mass flywheel on the torsional vibration of the automobile transmission system. When the electromagnetic device fails or the copper coil is not powered with current, the dual-mass flywheel still has the effect of variable inertia, and has the damping performance of the traditional dual-mass flywheel.

[0032] Working principle of a dual-mass flywheel based on electromagnetic control variable inertia:

[0033] The starting motor in the automobile works to drive the starting gear ring 2 to rotate, and then the engine starts to work normally. The torque output by the engine is firstly transmitted to the primary flywheel 1 through the crankshaft, so that the primary flywheel 1 rotates. The boss in the arc-shaped groove in the inner cavity of the primary flywheel 1 compresses the arc-shaped spring 3. After the arc-shaped spring 3 is extruded, the side lug of the transmission plate 4 is pushed. The transmission plate 4 is screw-connected with the secondary flywheel 5, and the torque is transmitted to the secondary flywheel 5. In the application, the current size of the input copper coil 9 is controlled to adjust the electromagnetic force suffered by the second permanent magnet 10, so that the distance of the second permanent magnet 10 to the center of rotation under different rotating speeds is changed, the rotating inertia of the primary flywheel 1 and the rotating inertia ratio of the primary flywheel 1 and the secondary flywheel 5 are controlled, and the inherent frequency characteristics of the automobile transmission system are changed, so that the damping effect of the dual-mass flywheel on the torsional vibration of the automobile transmission system is improved.

[0034] The above description is only the preferred embodiment of the present application, but the present application should not be limited to the embodiment and the disclosure of the drawings. Therefore, any equivalent or modification completed without departing from the disclosed spirit of the present application falls within the protection scope of the present application.

Claims

1. An electromagnetic control variable inertia based dual mass flywheel characterized by: The double-mass flywheel is composed of a primary flywheel (1), a starting gear ring (2), an arc spring (3), a force transmission plate (4), a secondary flywheel (5), a pressure plate (6), a magnetic yoke (7), a first permanent magnet (8), a copper coil (9), a second permanent magnet (10), a housing cover (11), a housing body (12), an inner-layer linear spring (13), an outer-layer linear spring (14), a connecting plate (15), and a cover plate (16). The starting gear ring (2) is spot-welded with the outer circumference of the primary flywheel (1), the primary flywheel (1) has two symmetrical arc-shaped grooves in the inner cavity, and two bosses are arranged in the arc-shaped grooves, the arc spring (3) is installed in the arc-shaped grooves in the inner cavity of the primary flywheel (1), a through hole is arranged at the central axis of the primary flywheel (1), six threaded holes are uniformly arranged on the side of the primary flywheel (1) facing the secondary flywheel (5), fourteen threaded holes are symmetrically distributed on the side of the primary flywheel (1) away from the secondary flywheel (5), wherein the six threaded holes are connected with the engine crankshaft through screws, the cover plate (16) is fixed on the primary flywheel (1) through screws at the other eight threaded holes, in addition, four radial grooves for installing electromagnetic devices are arranged on the side of the primary flywheel (1) away from the secondary flywheel (5), and four threaded holes are arranged at both ends of each radial groove. The electromagnetic device is composed of the magnetic yoke (7), the first permanent magnet (8), the copper coil (9), the second permanent magnet (10), the housing cover (11), the housing body (12), the inner-layer linear spring (13), the outer-layer linear spring (14), and the connecting plate (15).

2. The dual-mass flywheel based on electromagnetic control variable inertia according to claim 1, characterized in that: The secondary flywheel (5) has a disc-like structure, one side of the secondary flywheel (5) is provided with a threaded hole, the secondary flywheel (5) is connected with the clutch through a screw at the threaded hole, the secondary flywheel (5) has a through hole in the center and six through holes uniformly arranged around the through hole, the pressure plate (6) is uniformly provided with six through holes, and the pressure plate (6) is connected with the primary flywheel (1) through a screw at the through hole on the pressure plate (6) after passing through the central through hole of the secondary flywheel (5).

3. The dual-mass flywheel based on electromagnetic control variable inertia according to claim 1, characterized in that: The force transmission plate (4) has a circular ring structure, a through hole is arranged at the center of the force transmission plate (4), six threaded holes are uniformly distributed around the through hole, two outwardly extending side ear plates are symmetrically arranged in the radial direction at the periphery of the force transmission plate (4), and the force transmission plate (4) is connected with the secondary flywheel (5) through a screw.

4. The dual-mass flywheel based on electromagnetic control variable inertia according to claim 1, characterized in that: The copper coil (9) is cylindrical and arranged in the magnetic yoke (7), the magnetic yoke (7) is provided with a through hole on the side surface for leading out the copper wire of the copper coil (9), and the bottom of the magnetic yoke (7) is uniformly provided with four through holes, the first permanent magnet (8) is installed at the center of the copper coil (9), the second permanent magnet (10) is fixed in the shell body (12) through the shell cover (11), the shell cover (11) and the shell body (12) are connected by screws, and the shell cover (11), the second permanent magnet (10) and the shell body (12) are fixed together and installed in the magnetic yoke (7), one side of the shell body (12) is connected with the inner layer linear spring (13) and the outer layer linear spring (14), the other side of the inner layer linear spring (13) and the outer layer linear spring (14) is connected with the connecting plate (15), the connecting plate (15) is uniformly provided with four through holes, and the magnetic yoke (7) and the connecting plate (15) are fixed at both ends of the radial groove of the primary flywheel (1) by screws.

5. The dual-mass flywheel based on electromagnetic control variable inertia according to claim 1, characterized in that: The cover plate (16) is provided with eighteen through holes, eight of which are used to fix the cover plate (16) on the primary flywheel (1) by screwing through the through holes, four of which are used to lead out the copper wire of the copper coil (9), and the other six near the central axis are used to fix the primary flywheel (1) with the crankshaft by screwing through the through holes.

Images