Novel dual-mass flywheel magnetic induction type semi-active torsion damper

Abstract

The invention provides a novel dual-mass flywheel magnetic induction type semi-active torsion damper. The novel dual-mass flywheel magnetic induction type semi-active torsion damper comprises a first rotating inertia assembly, a second rotating inertia assembly and a magnetic induction adjusting mechanism. The magnetic induction adjusting mechanism is located on the right side of the second rotation inertia assembly and is composed of an arc-shaped lever mechanism, a spring reset mechanism, a shifting fork lever mechanism and a lead screw nut mechanism. A screw rod nut mechanism is driven by a servo motor in the adjusting mechanism, so that spiral transmission can be realized; therefore, the shifting fork lever mechanism can push the arc-shaped lever mechanism to control the axial distance between the permanent magnets, the spring reset mechanism can enable the permanent magnets to return to the initial position, and the result of controlling the damping force is achieved. The structure is easy to disassemble, the structure is compact, and the purpose of vibration reduction can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of mechanical transmission and vibration control technology, and in particular to a novel dual-mass flywheel magnetic induction type semi-active torsional vibration damper. The mechanism combines the dual-mass flywheel and magnetic induction principles, realizes torsional vibration reduction through magnetic force, and adopts a specific control method to adjust the vibration reduction effect.

[0002] The present invention aims to provide an efficient, stable and reliable vibration reduction mechanism, which is suitable for various mechanical equipment requiring vibration reduction and stable transmission, such as automobiles, motorcycles, engineering machinery, ships, aerospace equipment and industrial equipment. Background Art

[0003] Torsional vibration is a common problem in mechanical transmission systems. This vibration not only affects the stability and durability of the equipment, but may also have a negative impact on the performance of the equipment. In order to solve this problem, people have developed a variety of torsional vibration reduction mechanisms, among which the dual-mass flywheel torsional vibration damper has attracted widespread attention due to its excellent vibration reduction performance.

[0004] At present, dual-mass flywheel torsional vibration dampers have been widely studied and applied. This type of vibration damper disperses the vibration energy of the transmission system between the two flywheels through the structural design of the dual-mass flywheel, and absorbs and dissipates it through elastic elements and damping elements, thereby achieving a vibration reduction effect. However, the existing dual-mass flywheel torsional vibration dampers still have some problems and shortcomings.

[0005] Firstly, some traditional dual-mass flywheel shock absorbers often use more complex structures and materials during the design and manufacturing process, resulting in higher production costs and less than ideal vibration reduction effects under certain working conditions.

[0006] Secondly, some dual-mass flywheel shock absorbers have deficiencies in control and cannot achieve real-time and precise adjustment. As a result, under some special working conditions, the shock absorber may not be able to fully exert its performance, thus affecting the stability and durability of the equipment.

[0007] In view of the problems and shortcomings in the prior art, the present invention proposes a novel dual-mass flywheel magnetic induction semi-active torsional vibration damper. The mechanism combines the dual-mass flywheel and the magnetic induction principle, realizes torsional vibration reduction through magnetic force, and adopts a specific control method to adjust the vibration reduction effect. The structural design optimizes the structural design of the dual-mass flywheel, designs a novel control mechanism, and adopts a fork + lever + spring combination to achieve vibration reduction. Summary of the invention

[0008] In order to solve the technical problems of unsatisfactory vibration reduction effect and insufficient control in the design and manufacturing process of the existing ordinary flywheel vibration absorber, the present invention provides a new dual-mass magnetic induction semi-active torsional vibration absorber. The core idea is to combine the dual-mass flywheel and the magnetic induction principle, realize torsional vibration reduction through magnetic force, and use a control mechanism to achieve precise adjustment of the vibration reduction effect.

[0009] The first rotating inertia component and the second rotating inertia component in the dual-mass flywheel are connected, and the two are connected through a force transmission device to form a dual-mass structure. After the arc spring part in the first rotating inertia component initially attenuates the vibration, the second rotating inertia component can use the magnetic induction principle to stabilize the secondary flywheel in the second component, so that the secondary flywheel can smoothly transmit power to the gearbox input shaft, so as to further reduce vibration and improve the vibration reduction effect.

[0010] The first rotating inertia component is the dual-mass flywheel assembly, including a primary flywheel, a friction gasket, a connecting plate, a bearing, an arc spring, a cover, a rivet, a connecting ring, and a front cover; the second rotating inertia component includes a secondary flywheel, a gear shaft, an inertia plate, and a bearing; the left permanent magnet is fixed to the inner wall of the front cover, and the right side of the right permanent magnet is engaged with the inner wall of the rear cover through a spring and a cylinder with a groove; the adjustment mechanism is composed of a motor drive mechanism, a screw nut transmission mechanism, a fork lever mechanism, an arc lever mechanism, a spring reset mechanism, a sleeve, and a fork ring; by controlling the coordinated movement of the servo motor and the screw nut transmission mechanism, the fork is driven to move and the fork ring is rotated, so that the right permanent magnet can be axially moved and adjusted, thereby providing an adjustment magnetic flux to change the size of the over-damping force to achieve a vibration reduction effect.

[0011] The output shaft of the engine is connected to the first rotating inertia component, and the power of the engine is transmitted to the second rotating inertia component through the first rotating inertia component. The front cover in the first rotating inertia component is connected to the primary flywheel through a connecting ring and fastened by screws; the rear cover is connected to the front cover through bolts, the left permanent magnet in the front cover is connected to the front cover through bolts and its own magnetic force, and the right permanent magnet is connected to the rear cover through a spring and a cylinder with a groove, and is connected to the fastening plate through bolts; further, the outer end of the secondary flywheel in the second rotating inertia component is driven by a gear shaft to install a sleeve, the sleeve and the shaft are connected and fixed by a flat key, and a clamping installation of a shift fork lever mechanism is installed on the sleeve, and the shift fork ring is fixed to the sleeve through a rectangular spline, and its improvement is to slightly increase the thickness of its inner ring to install a small rod with a bend; the upper end of the shift fork is provided with a hole that matches the screw rod and a long groove is opened on it to reduce its mass.

[0012] When the torsional vibration generated by the engine is transmitted to the first rotating inertia component, there is a general vibration phenomenon. The vibration can be attenuated by adjusting the stiffness of the arc spring inside the first rotating inertia component, but the vibration is still large and can be further weakened by the subsequent control mechanism and eddy current mechanism. First, when the vibration frequency reaches the set value and the vibration needs to be reduced, the servo motor in the control mechanism rotates forward to drive the screw to rotate. The screw is connected to the spiral sleeve on the fork. At this time, the rotation of the screw can drive the fork to move axially to the left. The movement of the fork causes the small rod of the fork ring to slide upward in the annular groove. Then, the screw push rod pushes the upper end of the fork to move axially to the right. Since fulcrums are provided on both sides of the middle part of the fork, and the fulcrums are fixedly connected to the box body, the lower end of the fork can move axially to the left without rotating. At the same time, a slide rail is provided on the fork to increase the stability of the fork. Since the fork is fitted on the fork ring, the fork ring also moves axially. Since the shift fork ring is provided with an oblique groove, the small rod of the shift fork ring is engaged with the oblique groove of the shift fork ring through a roller, so the movement of the shift fork ring will cause the shift fork ring to move; the shift fork ring is installed on a sleeve with a rectangular spline groove to prevent relative rotation between the shift fork ring and the sleeve; the axial movement of the shift fork ring drives the lever to rotate counterclockwise, and needle bearings are provided on both sides of the arc-shaped lever to reduce the friction between the shift fork ring and the permanent magnet 2; the lever further pushes the right permanent magnet to move left, so that the secondary flywheel cuts more magnetic induction lines, strengthens the damping force, and achieves the purpose of stabilizing the secondary flywheel and attenuating vibration, so that the power is smoothly transmitted to the next component.

[0013] Finally, when the vibration frequency is less than the set value, the density of the magnetic induction lines needs to be reduced; at this time, the servo motor reverses, causing the lead screw to reverse and contract, causing the upper end of the fork to move to the right, the lower end to move to the right, and thus the fork ring also moves to the right. Due to the action of the spring in the rear cover, the right permanent magnet is driven to move to the right, and then the secondary flywheel cuts less magnetic induction lines and the damping force is weakened.

[0014] Beneficial Effects

[0015] To improve the vibration reduction effect, the magnetic induction principle is introduced to induce current by using the change of magnetic field, thereby generating magnetic force to achieve torsional vibration reduction. This principle not only improves the vibration reduction effect, but also makes the shock absorber more adaptable and controllable.

[0016] It adopts a simpler and more reliable structure. At the same time, since the magnetic induction vibration reduction device is adaptive and can automatically adjust the damping force according to the vibration conditions of the transmission system, it does not need frequent replacement and adjustment, further reducing maintenance costs.

[0017] The novel dual-mass flywheel magnetic induction type semi-active torsional vibration damper of the present invention has wide applicability and can be applied to various mechanical equipments requiring vibration reduction and stable transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure diagram of the present invention is schematically shown;

[0019] Figure 2 The exploded view of the overall structure of the present invention is schematically shown;

[0020] Figure 3 The schematic diagram of the overall structure and working principle of the present invention is shown;

[0021] Figure 4 The cross-sectional directional diagram of the present invention is schematically shown;

[0022] Figure 5 The schematic diagram shows the cross-sectional view of the first and second rotational inertia assembly structures of the present invention;

[0023] Figure 6 The lever mechanism arrangement diagram of the present invention is schematically shown;

[0024] Figure 7 The installation arrangement diagram of the return spring of the present invention is schematically shown;

[0025] Figure 8 The control logic diagram of the present invention is schematically shown;

[0026] Among them, the figure numbers are: 1-first rotating inertia component; 2-second rotating inertia component; 3-motor; 4-screw; 5-guide rail; 6-shift fork; 7-magnetic induction adjustment mechanism; 8-screw sleeve; 101-left end cover; 102-right end cover; 103-connecting ring; 104-nut; 105-front cover; 106-permanent magnet 1; 107-permanent magnet 2; 108-rear cover; 109-bolt; 110-fastening plate; 201-inertia disk 1; 202-bearing; 203-secondary flywheel; 204 gear shaft; 701-arc lever; 702-sleeve; 703-shift fork ring; 704-cover; 705-reset spring; 706-groove cylinder; 707-needle bearing. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: wherein the accompanying drawings are only used for illustrative purposes, and represent only schematic diagrams rather than actual drawings, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present application, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0028] Specific embodiment: The present invention uses a dual-mass flywheel assembly M1 (1), M2 (2) and a magnetic induction adjustment and control mechanism to achieve control and vibration reduction functions;

[0029] Specifically, Figure 1 As shown, the first rotational inertia component M1 (1), the second rotational inertia component M2 (2), and the magnetic induction adjustment and control mechanism are located on the right side of the second rotational inertia component. Figure 3 As shown in the figure, when the torsional vibration generated by the engine is transmitted to the first rotating inertia component M1 through the output shaft, there is a large vibration phenomenon at first, and it rotates with the rotating shaft. Since there is an arc spring in the first rotating inertia component M1, according to the DMF vibration reduction principle, the arc spring can initially reduce the vibration generated by the system and transmit power to the second rotating inertia component M2 in the middle. However, the vibration phenomenon is still obvious at this time, so it is necessary to continue the vibration reduction process;

[0030] Furthermore, the inertia disk 1 (201) in the second rotating inertia component M2 is connected to the first rotating inertia component M1 and the secondary flywheel (203) to rotate together; when the vibration frequency reaches a set value, a magnetic induction adjustment and control mechanism is required to participate in vibration reduction;

[0031] Furthermore, at this time, the servo motor (3) in the control mechanism starts to work in the forward direction, driving the screw (4) to rotate;

[0032] Furthermore, there is a spiral sleeve (8) on the lead screw that matches with it, and the forward rotation of the lead screw drives the spiral sleeve to move leftward;

[0033] Furthermore, the upper end of the shift fork (6) is connected to a spiral sleeve so that it moves axially to the left on the guide rail (5);

[0034] Furthermore, since the shift fork ring (703) mounted in pair with the shift fork is connected to the sleeve (702) via a rectangular spline, and the sleeve and the gear shaft (204) are connected via a flat key, the shift fork ring can move axially on the sleeve, so the lower end of the shift fork pushes against the shift fork ring to move axially to the left;

[0035] Furthermore, the front end of the shift fork ring pushes the three arc-shaped levers (701) to rotate counterclockwise to hold the permanent magnet 2 (107) to move axially to the left. Needle bearings (707) are provided on both sides of the arc-shaped levers to reduce the friction between the shift fork ring and the permanent magnet 2.

[0036] Finally, the distance between the permanent magnets 2 on the right side of the secondary flywheel (203) is reduced, and the magnetic attraction is finally strengthened, so as to achieve the purpose of stabilizing the secondary flywheel and attenuating vibration, so that the power is smoothly transmitted to the next component;

[0037] Furthermore, the smaller the spacing between the permanent magnets 2 is, the denser the magnetic flux lines are, the greater the magnetic attraction is, the better the vibration reduction effect is, and the more stable the secondary flywheel is;

[0038] Furthermore, when the vibration frequency is lower than the set value, the magnetic attraction force needs to be weakened;

[0039] Specifically, the axial distance of the permanent magnet 2 needs to be reduced, and the servo motor in the control mechanism is reversed, so that the lead screw is reversed, the upper end of the shift fork moves rightward, the lower end moves rightward, and the shift fork ring also moves rightward, and the six return springs (705) arranged on the right side of the permanent magnet 2 return to their original positions;

[0040] Specifically, when the shift fork ring moves to the right, the distance between the permanent magnets 2 is enlarged due to the reset of the reset spring, and the axial distance x is reduced, thereby weakening the magnetic attraction;

[0041] Furthermore, when the system stops working, the screw nut mechanism shrinks to the initial position, and the fork lever mechanism, the fork ring, and the return spring all return to the state before the start of work.

[0042] The above embodiments are only used to illustrate the present application, rather than to limit the present application. Technicians in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope of protection of the present application, and the scope of protection of the present application should be defined by the claims.

Claims

1. A new type of dual-mass flywheel magnetic induction semi-active torsional vibration damper, characterized in that A first rotational inertia component, a second rotational inertia component, and a magnetic induction adjustment mechanism; the magnetic induction adjustment mechanism includes a motor drive mechanism, a lead screw nut transmission mechanism, a shift fork lever mechanism, an arc lever mechanism, a spring reset mechanism, a sleeve, and a shift fork ring.

2. The novel dual-mass magnetic induction semi-active torsional vibration damper according to claim 1 is characterized in that: Permanent magnets are fixed on both sides of the secondary flywheel, and the magnetic strength can be adjusted by changing the axial distance between the permanent magnet 2 and the secondary flywheel. The motor drive mechanism is composed of a servo motor and a lead screw nut transmission mechanism, which can realize the movement transformation from rotation to extension; the lead screw rotates forward so that the fork pushes the arc lever axially, thereby reducing the axial distance between the two permanent magnets and increasing the magnetic force; the reset spring in the spring reset mechanism is installed between the back cover and the permanent magnet 2, and is stretched and deformed in the process of increasing the magnetic force; when the magnetic force is reduced, the deformation is restored and the stretching transformation is performed, and at the same time, the lead screw is reversed to return to the initial position, thereby restoring the fork to the initial position.

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