Torsion-limiting shock absorber with damping self-adjusting function

Abstract

The utility model discloses a torsion limiting shock absorber with a damping self-adjusting function. The torsion limiting shock absorber comprises a cover shell, a disc hub is arranged in the cover shell in a rotating fit mode, shock absorption springs are connected to the disc hub in a circumferential array mode, buffer grooves for limiting the movement range of the shock absorption springs are formed in the cover shell, a spline drum is fixed to the center of the disc hub, and a front shock absorption disc and a rear shock absorption disc are arranged on the two sides of the cover shell. The front vibration reduction disc is provided with two sets of arc-shaped hole positions to form angle holes, a second-stage damping fin of a metal annular structure is arranged between the front vibration reduction disc and the rear vibration reduction disc, two sets of movable claws with arc-shaped cross sections are arranged on the side, close to the angle holes, of the second-stage damping fin, and the movable claws and the angle holes on the same sides of the movable claws are in rotating fit. The hole width of the angle hole is larger than that of the movable claw; the movable claw between the second-stage damping fin and the front vibration reduction disc is rotationally matched with a stop damping fin of a circular ring structure, and a damping gasket and a disc spring are arranged below the stop damping fin; the damping device has the beneficial effect that damping can be adaptively adjusted according to working conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of torsion-limiting vibration dampers for automobiles, and particularly relates to a torsion-limiting vibration damper with a self-adjusting damping function. Background Art

[0002] The power of the extended-range vehicle engine is transmitted to the generator by the torque-limiting damper. The torque-limiting damper assembly is located between the engine and the generator. Its main function is to transmit the engine torque and reduce the torque fluctuation transmitted from the engine to the generator end, thereby improving the NVH (noise, vibration and harshness) performance of the vehicle. In the prior art, the traditional shock absorber has a fixed damping vibration absorption function (such as a vehicle range extender electromechanical coupling buffer torque-limiting mechanism with publication number CN215596299U). When the power system has a large torque fluctuation, the vibration absorption capacity is insufficient; however, the initial damping is set to a large value. When the output is stable, the vibration reduction system does not work because the fluctuating torque cannot overcome the damping, and the vibration is rigidly transmitted to the rear end - the vibration reduction effect is poor in the steady state, so the prior art requires an adjustable damping torque-limiting damper that can be applied to the above two working conditions. Utility Model Content

[0003] The utility model aims to provide a torsion limiting vibration absorber with a self-adjusting damping function, so as to solve the technical problem that the vibration damping cannot be adjusted in the above-mentioned background technology.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A torsion-limited vibration damper with self-adjusting damping function, comprising: a cover shell, a rear vibration damping plate, and a front vibration damping plate; the cover shell is a circular ring structure, an annular cavity is arranged in the cover shell, a disc hub with a disc structure is rotatably matched in the cavity, a vibration damping spring is connected to a circumferential array on the disc hub, a buffer groove for limiting the movement range of the vibration damping spring is arranged on the cover shell, a spline drum is fixed at the center of the disc hub, a vibration damping plate with a disc structure is arranged on both sides of the cover shell, respectively, a front vibration damping plate and a rear vibration damping plate; the front vibration damping plate and the rear vibration damping plate are connected and fixed by connecting pins; the front vibration damping plate is provided with two groups of arc-shaped holes to form angle holes, and the front vibration damping plate is provided with two groups of arc-shaped holes to form angle holes. A secondary damping plate with a metal ring structure is provided between the vibration plate and the rear vibration damping plate. Two groups of movable claws with arc-shaped cross-sections are provided on the side of the secondary damping plate close to the angle hole. The movable claws and the angle holes on the same side form a rotational fit, and the hole width of the angle holes is larger than the width of the movable claws. A stop damping plate with a circular ring structure is rotationally fitted on the movable claws between the secondary damping plate and the front vibration damping plate. Four groups of claws with rod-shaped structures are provided under the stop damping plate. A damping gasket and a disc spring with annular structures are provided under the stop damping plate and the disk hub in turn. The damping gasket and the disc spring are respectively provided with a first clamping groove and a second clamping groove for clamping on the clamping groove.

[0006] Furthermore, in order to enable the front vibration damping plate, the stop damping plate, the secondary damping plate and the damping gasket to be tightly attached to each other and to provide friction damping when necessary, the disc spring is a conical ring structure in which the inner ring and the outer ring are not located in the same plane. When the front vibration damping plate is fastened and connected with the rear vibration damping plate, the disc spring is compressed so that it has an elastic tendency to push outward, thereby pressing the damping gasket, the secondary damping plate, the stop damping plate and the vibration damping plate tightly together.

[0007] Furthermore, in order to ensure that the movable claw and the angle hole on the same side of the movable claw can always remain concentric when rotating, that is, the front shock absorber plate and the secondary damping plate can always maintain concentric cooperation, the thickness of the movable claw is consistent with the hole width of the angle hole.

[0008] Furthermore, each group of the damping springs includes: a main spring and two spring seats; the two spring seats are fixed on both sides of the main spring, the spring seats are slidingly limited and engaged on the disc hub, the buffer grooves on the cover shell are located on the outside of the two groups of spring seats, and the width of the buffer grooves is greater than the total width of the two groups of spring seats.

[0009] Furthermore, in order to increase the damping elastic force of the damping spring, a secondary spring is embedded concentrically and non-contactly in the center of the main spring of each group of damping springs, and both ends of the secondary spring are respectively connected and fixed to the spring seat on the same side.

[0010] Furthermore, in order to integrate the cover shell with the rear damping plate and the front damping plate, the cover shell is provided with a pin hole for the connecting pin to penetrate, and the cross-sectional profile of the pin hole is consistent with the cross-sectional profile of the pin.

[0011] Furthermore, in order to increase the connection firmness between the spline drum and the disc hub and prevent relative rotation between them, a gear disc is provided under the spline drum, and the disc hub is provided with a gear groove for the gear disc to be concentrically embedded, and the spline drum is embedded in the gear groove by the gear disc.

[0012] Furthermore, in order to make the relative rotation between the spline drum and the rear damping plate and the front damping plate smoother and avoid damage caused by friction between the spline drum and the rear damping plate and the front damping plate, a bearing is respectively provided between the rear damping plate, the front damping plate and the spline drum; the rear damping plate and the front damping plate form a rotational fit with the spline drum through the bearings.

[0013] Furthermore, in order to improve the elastic reset ability of the disc spring and prevent the disc spring from deformation and rupture due to compression, the second slots of the disc spring are distributed in a circular array on the disc spring, and the second slots divide the outer side of the disc spring into a strip-like structure. The number of second slots is an integer multiple of four.

[0014] In summary, the utility model has the following beneficial effects:

[0015] The vibration damping can be adaptively adjusted according to the working conditions by setting up movable claws and angle holes:

[0016] ① When the system is in a steady state, the output torque fluctuation is small, and the vibration damping spring fluctuation angle is less than angle A(. At this time, in the damping system, the secondary damping plate, damping gasket, disc spring, disc hub, and stop damping plate are used as a whole. Through the connection between the four sets of claws on the stop damping plate and the damping gasket and disc spring, and through the elastic compression of the disc spring, the disc hub, the secondary damping plate, damping gasket, disc spring, stop damping plate, and disc hub are kept relatively fixed, and the friction between the stop damping plate and the front vibration damping plate produces damping.

[0017] ②When the system is impacted, the output torque fluctuates greatly, the fluctuation angle of the shock absorber spring is greater than angle A, and the movable claw of the secondary damping plate is limited by the side of the angle hole on the front shock absorber plate. Under the limiting action, the secondary damping plate and the front shock absorber plate act as a whole, and have relative movement with the disk hub, damping gasket and stop damping plate. In addition to the damping caused by the friction between the stop damping plate and the front shock absorber plate, the two sides of the secondary damping plate move relative to the damping gasket and the stop damping plate, and the friction produces additional damping, which makes the fluctuation quickly stabilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the middle buffer tank of the utility model;

[0021] Figure 4 It is an overall schematic diagram of the self-adjusting damping mechanism in the utility model;

[0022] Figure 5 It is an exploded schematic diagram of the self-adjusting damping mechanism in the utility model;

[0023] Figure 6 It is a front view structural schematic diagram of the utility model;

[0024] Figure 7 yes Figure 6 Schematic diagram of the AA section structure;

[0025] Figure 8 yes Figure 7 A magnified view of the structure at B in the middle;

[0026] In the figure, 1, cover shell; 2, rear damping plate; 3, front damping plate; 4, disc hub; 5, stop damping plate; 6, secondary damping plate; 7, damping gasket; 8, disc spring; 9, damping spring; 10, spline drum; 11, buffer groove; 12, pin hole; 21, connecting pin plate; 31, angle hole; 32, bearing; 51, claw; 61, movable claw; 71, first slot; 81, second slot; 91, main spring; 92, spring seat; 93, auxiliary spring. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] Example:

[0029] See also Figure 1-Figure 8 , the utility model provides a technical solution:

[0030] A torque limiting vibration damper with a self-adjusting damping function comprises: a cover shell 1, a rear vibration damping disc 2, and a front vibration damping disc 3; the cover shell 1 is a circular ring structure, an annular cavity is arranged in the cover shell 1, a disc hub 4 with a disc structure is rotatably matched in the cavity, a circumferential array on the disc hub 4 is connected with a vibration damping spring 9, a buffer groove 11 for limiting the motion range of the vibration damping spring 9 is arranged on the cover shell 1, a spline drum 10 is fixed at the center of the disc hub 4, and a vibration damping disc with a disc structure is arranged on both sides of the cover shell 1, which are the front vibration damping disc 3 and the rear vibration damping disc 2 respectively; the front vibration damping disc 3 and the rear vibration damping disc 2 are connected and fixed by a connecting pin sheet 21; the front vibration damping disc 3 is provided with two groups of arc-shaped holes to form angle holes 31, and ... A secondary damping plate 6 with a metal ring structure is provided between the vibration plates 2. Two groups of movable claws 61 with arc-shaped cross-sections are provided on one side of the secondary damping plate 6 close to the angle hole 31. The movable claws 61 and the angle hole 31 on the same side form a rotational fit, and the hole width of the angle hole 31 is larger than the width of the movable claws 61; a stop damping plate 5 with a circular ring structure is rotationally fitted on the movable claw 61 between the secondary damping plate 6 and the front vibration damping plate 3, and four groups of claws 51 with rod-shaped structures are provided below the stop damping plate 5. A damping gasket 7 and a disc spring 8 with an annular structure are provided below the stop damping plate 5 and the disk hub 4 in turn. The damping gasket 7 and the disc spring 8 are respectively provided with a first clamping groove 71 and a second clamping groove 81 for clamping on the clamping claw 51.

[0031] The disc spring 8 is a conical ring structure whose inner ring and outer ring are not located in the same plane. When the front damping plate 3 is fastened and connected with the rear damping plate 2, the disc spring 8 is compressed, so that it has an elastic tendency to push outward, thereby pressing the damping gasket 7, the secondary damping plate 6, the stop damping plate 5, and the damping plate 3 tightly together.

[0032] The thickness of the movable claw 61 is consistent with the width of the angle hole 31 .

[0033] Each group of the damping springs 9 includes: a main spring 91 and two spring seats 92; the two spring seats 92 are fixed on both sides of the main spring 91, and the spring seats 92 are slidably limited and fitted on the disc hub 4. The buffer groove 11 on the cover shell 1 is located on the outside of the two groups of spring seats 92, and the width of the buffer groove 11 is greater than the total width of the two groups of spring seats 92.

[0034] A secondary spring 93 is concentrically and non-contactly embedded in the center of the main spring 91 of each group of damping springs 9, and both ends of the secondary spring 93 are respectively connected and fixed to the spring seat 92 on the same side.

[0035] The cover shell 1 is provided with a pin hole 12 for the connecting pin piece 21 to penetrate, and the cross-sectional profile of the pin hole 12 is consistent with the cross-sectional profile of the pin piece 21 .

[0036] A gear disc is disposed below the spline drum 10 , and a gear groove 41 is disposed on the disc hub 4 for the gear disc to be concentrically embedded therein. The spline drum 10 is embedded in the gear groove 41 by the gear disc.

[0037] A bearing 32 is respectively arranged between the rear damping plate 2 , the front damping plate 3 and the spline drum 10 ; the rear damping plate 2 , the front damping plate 3 form a rotational fit with the spline drum 10 through the bearing 32 .

[0038] The second slots 81 of the disc spring 8 are distributed in a circular array on the disc spring 8 . The second slots 81 divide the outer side surface of the disc spring 8 into a strip-like structure. The number of the second slots 81 is an integer multiple of four.

[0039] Brief description of the usage process:

[0040] When in use, the spline drum is used to connect the rotating shaft of the generator, and the cover shell 1 is connected to the rotational power of the engine (generally the engine flywheel). The rotational power of the cover shell 1 is transmitted to the disc hub 4 through the vibration-damping spring 9, and the spline drum 10 on the disc hub 4 rotates accordingly, and the rotational force is transmitted to the generator through the spline drum 10, and the generator generates electricity. Because the disc hub 4 and the cover shell 1 are rotationally matched, when the speeds of the engine and the generator are different, a relative angular rotation will occur between the cover shell 1 and the disc hub 4. Therefore, when the cover shell 1 rotates, it will squeeze the spring seat 92 on one side of the vibration-damping spring 9 through the buffer groove 11 thereon. At this time, the main spring 91 and the auxiliary spring 93 on the squeezed spring seat 92 are compressed, and then the compression of the main spring 91 and the auxiliary spring 93 is used to adapt to the torque fluctuation when the speeds of the engine and the generator are different.

[0041] When the speeds of the engine and the generator tend to be consistent, the main spring 91 and the auxiliary spring 93 complete the reset under the elastic force of the main spring 91 and the auxiliary spring 93; in order to slow down the reset speed and elastic force compression speed of the main spring 91 and the auxiliary spring 93, avoid the main spring 91 and the auxiliary spring 93 from generating large noise, and also to reduce the impact of the spring seat 92 on the buffer groove 11 and increase the service life of the torque limiting shock absorber, it is necessary to apply a certain damping to the rotation of the disc hub 4. The damping system of the utility model has a self-adjusting function, and the specific adjustment methods are divided into the following two methods:

[0042] When the system is in a steady state, the output torque fluctuates slightly, and the fluctuation angle of the damping spring 9 (the fluctuation angle is the rotation angle of the disc hub 4 when the damping spring 9 is compressed) is smaller than the angle A (angle A is the maximum deflection angle of the movable claw 61 that can move in the angle hole 31, that is, the maximum deflection angle of the damping gasket 7 and the front damping disc 3). At this time, in the damping system, the secondary damping plate 6, the damping gasket 7, the disc spring 8, the disc hub 4, and the stop damping plate 5 are used as a whole. Through the connection between the four groups of claws 51 on the stop damping plate 5 and the damping gasket 7 and the disc spring 8, and through the elastic compression of the disc spring 8, the disc hub 4, the secondary damping plate 6, the damping gasket 7, the disc spring 8, the stop damping plate 5, and the disc hub 4 are kept relatively fixed, and the friction between the stop damping plate 5 and the front damping disc 3 produces damping;

[0043] When the system is impacted, the output torque fluctuates greatly, and the fluctuation angle of the shock-absorbing spring 9 is greater than the angle A (angle A is the maximum deflection angle of the movable claw 61 that can move in the angle hole 31, that is, the maximum deflection angle of the damping gasket 7 and the front shock-absorbing plate 3). The movable claw 61 of the secondary damping plate 6 is limited by the side of the angle hole 31 on the front shock-absorbing plate 3. Under the limiting action, the secondary damping plate 6 and the front shock-absorbing plate 3 act as a whole, and have relative movement with the disk hub 4, the damping gasket 7, and the stop damping plate 5. In addition to the damping generated by the friction between the stop damping plate 5 and the front shock-absorbing plate 3, the two side surfaces of the secondary damping plate 6 move relative to the damping gasket 7 and the stop damping plate 5, and the friction generates additional damping, so that the fluctuation is fast and stable.

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A torque limiting vibration absorber with self-adjusting damping function, comprising: A cover shell (1), a rear vibration damping disk (2), and a front vibration damping disk (3); characterized in that: the cover shell (1) is a circular ring structure, an annular cavity is provided in the cover shell (1), a disk hub (4) with a disc structure is rotatably fitted in the cavity, a circumferential array on the disk hub (4) is connected to a vibration damping spring (9), the cover shell (1) is provided with a buffer groove (11) for limiting the movement range of the vibration damping spring (9), a spline drum (10) is fixed at the center of the disk hub (4), and a vibration damping disk with a disc structure is provided on both sides of the cover shell (1), which are the front vibration damping disk (3) and the rear vibration damping disk (2); the front vibration damping disk (3) and the rear vibration damping disk (2) are connected and fixed by a connecting pin sheet (21); the front vibration damping disk (3) is provided with two groups of arc-shaped holes to form an angle hole (31), and a front vibration damping disk (3) and a rear vibration damping disk (2) are provided between them. A secondary damping plate (6) with a metal ring structure is provided with two groups of movable claws (61) with arc-shaped cross sections on one side of the secondary damping plate (6) close to the angle hole (31), the movable claws (61) and the angle hole (31) on the same side thereof are rotationally matched, and the hole width of the angle hole (31) is larger than the width of the movable claws (61); a stop damping plate (5) with a circular ring structure is rotationally matched on the movable claws (61) between the secondary damping plate (6) and the front vibration damping plate (3), four groups of clamping claws (51) with rod-shaped structures are provided below the stop damping plate (5), and a damping gasket (7) and a disc spring (8) with a ring structure are provided below the stop damping plate (5) and the disc hub (4), and a first clamping groove (71) and a second clamping groove (81) for clamping on the clamping claw (51) are provided on the damping gasket (7) and the disc spring (8), respectively.

2. The torque limiting vibration absorber with self-adjusting damping function according to claim 1, characterized in that: The disc spring (8) is a conical ring structure whose inner ring and outer ring are not located in the same plane. When the front damping plate (3) is fastened and connected with the rear damping plate (2), the disc spring (8) is compressed, so that it has an elastic tendency to push outward, thereby pressing the damping gasket (7), the secondary damping plate (6), the stop damping plate (5) and the damping plate (3) together.

3. The torque limiting vibration absorber with self-adjusting damping function according to claim 1, characterized in that: The thickness of the movable claw (61) is consistent with the hole width of the angle hole (31).

4. The torque limiting vibration absorber with self-adjusting damping function according to claim 1, characterized in that: Each group of the damping springs (9) comprises: a main spring (91) and two spring seats (92); the two spring seats (92) are fixed on both sides of the main spring (91); the spring seats (92) are slidably limited and matched on the disk hub (4); the buffer grooves (11) on the cover shell (1) are located outside the two groups of spring seats (92); and the width of the buffer grooves (11) is greater than the total width of the two groups of spring seats (92).

5. The torsion limiting vibration damper with self-adjusting damping function according to claim 4, characterized in that: A secondary spring (93) is embedded in the center of the main spring (91) of each group of damping springs (9) in a concentric and non-contact manner, and both ends of the secondary spring (93) are respectively connected and fixed to the spring seat (92) on the same side.

6. The torque limiting vibration absorber with self-adjusting damping function according to claim 1, characterized in that: The cover shell (1) is provided with a pin hole (12) for the connecting pin piece (21) to penetrate, and the cross-sectional profile of the pin hole (12) is consistent with the cross-sectional profile of the pin piece (21).

7. The torsion limiting vibration damper with self-adjusting damping function according to claim 1, characterized in that: A gear disc is arranged below the spline drum (10), and a gear groove (41) is arranged on the disc hub (4) for the gear disc to be coaxially embedded therein, and the spline drum (10) is embedded in the gear groove (41) by the gear disc.

8. The torque limiting vibration absorber with self-adjusting damping function according to claim 7, characterized in that: A bearing (32) is respectively arranged between the rear vibration damping plate (2), the front vibration damping plate (3) and the spline drum (10); the rear vibration damping plate (2) and the front vibration damping plate (3) form a rotational fit through the bearing (32) and the spline drum (10).

9. The torsion limiting vibration damper with self-adjusting damping function according to claim 2, characterized in that: The second slots (81) of the disc spring (8) are distributed in a circumferential array on the disc spring (8), the second slots (81) divide the outer side surface of the disc spring (8) into a strip-like structure, and the number of the second slots (81) is an integer multiple of four.

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