KR20230102229A - Device for damping vibration having multi-step torsional vibration damper - Google Patents

Abstract

The present invention relates to a vibration damping device, comprising two or more damping units connected in parallel and arranged coaxially, each comprising at least one input and output, comprising: an output of a first damping unit and a second damping unit; The input units of the units are coupled so as to be fixed to each other in the rotational direction, and the output unit of the first damping unit and the input unit of the second damping unit each have a center hole through which a sliding shaft can pass, but have different diameters, When the output part of the first damping unit and the input part of the second damping unit are aligned on the slide shaft in a state of coupling with each other, the one having the smaller diameter center hole of the two is the surface of the center hole is the sliding surface of the slide shaft , whereas having a larger diameter center hole provides a vibration damping device configured such that the surface of the center hole is radially spaced from the sliding surface.

Description

Vibration damping device having a multi-stage torsion damper {DEVICE FOR DAMPING VIBRATION HAVING MULTI-STEP TORSIONAL VIBRATION DAMPER}

The present invention relates to a vibration damping device for a vehicle, and more particularly to a rotor and damper assembly having a multi-stage torsion damper.

As a power transmission device for a hybrid vehicle, a form in which a motor is installed in a transmission and a vibration damping device is arranged radially inside is known. A torsion damper, also referred to as a torsional vibration damper or a torsional vibration damper, can improve engine vibration absorption performance by connecting two or more dampers in parallel. The torsion damper may be located inside the transmission and uses transmission oil as a lubricant.

Regarding Patent No. 10-2238844, "Power Transmission Device for Hybrid Vehicle", as shown in FIG. 1, a torsion damper unit 40 for damping vibration between the engine unit 100 and the transmission 200 is arranged And, the torsion damper unit 40 includes a first damper unit 41 and a second damper unit 42. Referring to the enlarged view at the bottom of FIG. 1, the driven plate (A) of the first damper part 41 and the front cover plate (B) of the second damper part 42 are integrally coupled by a riveted joint (C) . In general, after riveting is performed through holes formed in each of the driven plate (A) and the front cover plate (B), distortion occurs due to manufacturing tolerance or the like. In this state, it is practically impossible to concentrically align the coupled plates along one axis.

Therefore, in order to coaxially align these coupling plates, post-processing after riveting is absolutely necessary. In the enlarged view, for axial alignment of the riveted plates A and B, the center hole surface D of the driven plate A and the center hole surface E of the front cover plate B are simultaneously must be processed

It is absolutely necessary to precisely machine the center hole surfaces (D and E) of each plate for axial alignment. However, even if the center hole surface of each plate A and B is precisely machined in a single unit state, since a tolerance occurs due to the coupling of the two plates, post-processing to match the concentricity is absolutely necessary.

For this reason, it was possible to proceed with the subsequent assembly process only after first combining the driven plate (A) and the front cover plate (B) and completing post-processing for axial alignment.

Since the driven plate (A) generally has a larger volume and radius than the front cover plate (B), to rivet the front cover plate and the rear cover plate of the second damper unit 42 with the driven plate coupled Interference often occurred, and there were disadvantages such as requiring a larger mold during welding.

An object of the present invention is to provide a vibration damping device having a multi-stage torsion damper that does not require post-processing for shaft alignment in a state in which the output unit of the first damping unit and the input unit of the second damping unit are coupled.

In addition, an object of the present invention is to provide a vibration damping device having a multi-stage torsion damper, enabling assembly of the second damping unit in a state in which the output unit of the first damping unit is not coupled.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

A vibration damping device according to the present invention for achieving the above object includes the following aspects and any combination thereof.

One aspect of the present invention is a vibration damping device comprising two or more damping units connected in parallel and arranged coaxially, each comprising at least one input and output, comprising: an output of a first damping unit and an input of a second damping unit; The parts are coupled to be fixed to each other in the direction of rotation, and the output part of the first damping unit and the input part of the second damping unit each have a central hole through which a sliding shaft can pass, but the diameters are different from each other, and the first damping When the output of the unit and the input of the second damping unit are aligned on the slide shaft in a state of being coupled to each other, the one having the smaller diameter center hole of the two makes the surface of the center hole abut against the slide surface of the slide shaft; , having a larger diameter center hole is a vibration damping device configured such that the surface of the center hole is radially spaced from the sliding surface.

Another aspect of the present invention, in addition to the above aspect, of the output of the first damping unit and the input of the second damping unit, the one having a larger axial thickness of the center hole has a smaller diameter center hole Vibration damping It is a device.

Another aspect of the present invention, in addition to the above aspect, further includes a cylindrical member arranged to abut the sliding surface of the sliding shaft, wherein the central hole surface of the one having the smaller diameter central hole is instead of the sliding surface. A vibration damping device configured to abut against a member.

Another aspect of the present invention, in addition to the above aspect, is a vibration damping device wherein the sliding shaft is a splined hub.

Another aspect of the present invention, in addition to the above aspect, is a vibration damping device wherein the sliding axis is a rotor shaft.

In another aspect of the present invention, in addition to the above aspect, the output of the first damping unit and the input of the second damping unit have a coupling hole at a position corresponding to each other, and the spline hub is at a position corresponding to the coupling hole It is a vibration damping device with a through hole.

Another aspect of the present invention, in addition to the above aspect, is a vibration damping device in which shaft alignment processing is performed only for a center hole having a smaller diameter among the output of the first damping unit and the input of the second damping unit.

Another aspect of the present invention, in addition to the above aspect, is a vibration damping device in which the alignment process may be performed before the output of the first damping unit and the input of the second damping unit are coupled to each other.

Another aspect of the present invention, in addition to the above aspect, assembles the second damping unit by coupling the input part and the output part of the second damping unit from both sides with parts including a spline hub interposed therebetween, and then assembling the assembled second damping unit. A vibration damping device capable of coupling an output of a first damping unit to an input of the unit.

Another aspect of the present invention, in addition to the above aspect, is vibration damping, to which coupling means can be applied through the through hole of the spline hub when coupling the output of the first damping unit to the input of the assembled second damping unit. It is a device.

Another aspect of the present invention, in addition to the above aspect, is a vibration damping device in which an oil flow groove is provided on the surface of the center hole of the first damping unit.

Another aspect of the present invention, in addition to the above aspect, is a vibration damping device provided with an oil flow groove on a sliding surface of the sliding shaft.

According to the present invention, since only one of the output unit of the first damping unit and the input unit of the second damping unit needs to be subjected to alignment processing, the difficulty of alignment processing is greatly reduced.

In addition, according to the present invention, after coupling the output unit of the first damping unit and the input unit of the second damping unit, there is no need to perform post-processing for axial alignment, thereby simplifying the assembly process.

Also, according to the present invention, since the second damping unit can be assembled in a state in which the output of the first damping unit is not coupled, much simpler assembly is possible.

Also, according to the present invention, the contact area of the first damping unit or the second damping unit with the sliding surface is reduced, so that the amount of wear can be reduced.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 schematically shows a power transmission device for a hybrid vehicle according to the prior art of the present invention.
2 is a perspective view of a rotor and damper assembly according to an embodiment of the present invention.
3 is a rear view of a rotor and damper assembly according to an embodiment of the present invention.
4A is a front view of a driven plate according to an embodiment of the present invention, and FIG. 4B is a perspective view of a driven plate according to another embodiment of the present invention.
5 is a front view of a front cover plate according to an embodiment of the present invention.
6A is a perspective view of a spline hub according to an embodiment of the present invention, and FIG. 6B is a perspective view of a spline hub according to another embodiment of the present invention.
7 is a side view of a rotor shaft according to an embodiment of the present invention.
8 is a half cross-sectional view of a rotor and damper assembly according to an embodiment of the present invention.
9 is a half cross-sectional view of a rotor and damper assembly according to another embodiment of the present invention.

The present invention is not limited to the embodiments disclosed below, and various changes may be applied and may be implemented in a variety of different forms. Only this embodiment is provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, but all changes and equivalents included in the technical spirit and scope of the present invention as well as substitution or addition of the configuration of one embodiment and the configuration of another embodiment each other to substitutes.

The accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and technical scope of the present invention It should be understood to include water or substitutes. In the drawings, components may be exaggeratedly large or small in size or thickness in consideration of convenience of understanding, etc., but due to this, the scope of protection of the present invention should not be construed as being limited.

Terms used in this specification are only used to describe specific implementations or examples, and are not intended to limit the present invention. And expressions in the singular include plural expressions unless the context clearly dictates otherwise. In the specification, terms such as "comprise" and "consist of" are intended to designate that features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist. That is, in the specification, terms such as ~ include, ~ consist of, etc. It should be understood that it does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

When an element is referred to as being “on top” or “under” another element, it should be understood that other elements may exist in the middle as well as being directly above the other element. .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this specification, it should not be interpreted in an ideal or excessively formal meaning. don't

Since the assembly of the embodiment is symmetric about the axis, for convenience of drawing, only half of the axis can be shown. In addition, for convenience of explanation, the direction along the longitudinal direction of the shaft that forms the center of rotation of the assembly is called the axial direction, that is, the front-back or axial direction is a direction parallel to the rotation axis, and the front (front) is any direction that is a power source, such as a vehicle It means a direction toward the drive motor, and rear (rear) means a direction toward another direction, for example, toward a transmission. Therefore, the front side (front side) means the side where the surface faces forward, and the rear side (rear side) means the side where the surface looks backward.

The radial direction or the radial direction means a direction approaching the center or a direction away from the center along a straight line passing through the center of the rotation axis on a plane perpendicular to the rotation axis. A direction away from the center in a radial direction is referred to as a centrifugal direction, and a direction approaching the center is referred to as a centripetal direction.

The circumferential direction or circumferential direction means a direction that surrounds the circumference of the rotating shaft. The outer circumference means an outer circumference, and the inner circumference means an inner circumference. Therefore, the outer circumferential surface is a surface in a direction facing away from the rotational axis, and the inner circumferential surface means a surface in a direction facing the rotational axis.

The circumferential side surface means a surface whose normal line is directed in the circumferential direction.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 2, according to an embodiment of the present invention, a rotor and damper assembly including a rotor shaft 10, a rotor sleeve 11, cover plates 40 and 41, a spline hub 50, and the like is shown. The rotor and damper assembly according to the present invention is preferably used for installation in a radially inner side of a motor in a hybrid vehicle transmission.

Referring to FIG. 3 which is a rear view of FIG. 2 , the cover plate 31 , the spring 42 , the spline hub 50 and the through hole 55 formed in the spline hub 50 are shown. The through hole 55 may serve as a passage through which the rivet 24 penetrates when the driven plate 30 or 30' is overlapped and fastened to the front cover plate 40 in a state in which the second damping unit is assembled. there is.

Figure 4a shows a driven plate 30, which is a component of the first damping unit, according to one embodiment of the present invention. The driven plate 30 has a central hole 34 formed in its center, a coupling hole 35 into which a coupling member such as a rivet can be inserted, and an oil flow hole 36 for the flow of lubricating oil, such as transmission oil (ATF). ). A series of holes formed close to the center of the driven plate 30 are coupling holes 35, and a series of holes formed farther away are oil flow holes 36. The center hole 34 is a hole into which a spline hub or a sliding shaft of a rotor shaft is inserted, and has a surface 34a formed by its thickness. The driven plate 30 may serve as an output unit of the first damping unit.

4B shows a driven plate 30' according to another embodiment. In this embodiment, instead of the oil flow hole 36 shown in Fig. 4A, an oil flow groove 36' is formed on the center hole surface 34a.

5 shows a front cover plate 40, which is a component of the second damping unit according to an embodiment of the present invention. The front cover plate 40 is coupled to the rear cover plate 41 (see FIGS. 8 and 9) with a rivet to form an exterior of the second damping unit. The front cover plate 40 includes a central hole 44 formed in its center, coupling holes 45 and 47 into which coupling members such as rivets can be inserted, and oil flow holes 46 for the flow of lubricating oil. . A series of holes formed closest to the center of the front cover plate 40 are inner coupling holes 45 and a series of holes formed farthest from the center are outer coupling holes 47 . The inner coupling hole 45 corresponds to the coupling hole 35 of the driven plate 30, and when the front cover plate 40 is coupled to the driven plate 30, the position and size matched to the coupling hole 35 have The oil flow hole 46 also has a position and size that match the oil flow hole 36 of the driven plate 30 . The two cover plates 40 and 41 may be coupled by inserting and fixing a coupling member such as a rivet or bolt through the outer coupling hole 47 and a corresponding hole (not shown) formed in the rear cover plate 41 . The central hole 44 is a hole into which a spline hub or a sliding shaft of a rotor shaft is inserted, and has a surface 44a formed by its thickness. The front plate 40 may serve as an input unit of the second damping unit.

By inserting coupling members such as rivets into the aforementioned coupling holes 35 and 45, the driven plate 30 and the front cover plate 40 may be coaxially arranged and fixed to each other in a rotational direction. By fixing in this way, when the driven plate 30 rotates, the front cover plate 40 can also rotate. In other words, the output of the driven plate 30 becomes the input of the front cover plate 40 as it is.

Since the combination of the driven plate 30 and the front cover plate 40 (hereinafter referred to as 'intermediate member') slides on the sliding shaft (51, 14, see FIGS. 8 and 9), processing is required

According to the present invention, the diameters of the central holes 34 and 44 of the driven plate 30 and the front cover plate 40 are formed to be different from each other. For example, the diameter of the center hole 34 of the driven plate 30 is smaller than the diameter of the center hole 44 of the front cover plate 40 . By doing so, in the intermediate member, the center hole surface 34a of the driven plate 30 abuts against the sliding surface 54 or 15 of the sliding shaft 51 or 14, while the center hole surface of the front cover plate 40 The surface 44a does not come into contact with the sliding surface 54 or 15.

In this case, only the center hole surface 34a of the driven plate 30 needs to be processed for axis alignment, and the center hole surface 44a of the front cover plate 40 needs to be processed for axis alignment. does not exist. Therefore, the driven plate 30 may be axially aligned as an individual component before assembling the intermediate member. In addition, after assembling all the second damping units including the front cover plate 40, it becomes possible to couple the driven plate 40 that has been axially aligned.

If the size of the diameter is opposite, only the front cover plate 40 will need to be axially aligned.

In the intermediate member, of the driven plate 30 and the front cover plate 40, the one having the thicker axial thickness of the center hole surfaces 34a and 44a (d1, d2, see FIG. 8) has the smaller diameter center hole 34 , 44) is preferred. With this configuration, a member having a larger thickness in the axial direction can abut on the sliding shafts 51 and 14 and rotate. For this purpose, the axial thickness (d1, d2) of one of the two plates (30, 40) may be deliberately made larger. In that case, it would be desirable to keep the sum of the two axial thicknesses the same as in the previous design so as not to affect the overall layout of the device. Of course, any one may be selected as long as it has the same thickness.

6A shows a splined hub 50 included in the second damping element, according to one embodiment of the present invention. The spline hub 50 includes a slide shaft 51 extending in the axial direction, a spline portion 52, and a through hole 55. The sliding shaft 51 may slide in contact with the aforementioned driven plates 30 and 30' and/or the front cover plate 40. Specifically, on the sliding surface 52 of the sliding shaft 51, the center hole surfaces 34a and 44a can contact and rotate.

Figure 6b shows a splined hub 50' according to another embodiment of the present invention. In this embodiment, an oil flow groove 53 is formed on the sliding surface 54.

7 shows a rotor shaft 10 according to an embodiment of the present invention. The rotor shaft 10 has a sliding axis 14 and a sliding surface 15. Depending on the embodiment, the sliding shaft 14 may slide in contact with the driven plates 30 and 30' and/or the front cover plate 40 or may slide with members other than these.

In the above-described embodiments, it is also possible to assemble by inserting a bush on the sliding surface 15 for smooth sliding rotation or reinforcement of strength. In this case, the center hole surfaces 34a, 44a and the sliding surface 15 do not come into direct contact, but indirect contact with the bush interposed therebetween. If the hardness of sliding members is similar, there will be no need to use a bush. For example, when the driven plate 30 and the spline hub 50 come into contact with each other to cause relative rotation, if the hardness between the two is high and almost equal, problems such as abrasion do not occur even without a bush.

Hereinafter, with reference to FIG. 8 showing a half-sectional view of a vibration damping device according to an embodiment of the present invention, the coupling and operating relationship of each component will be described.

First, the left side of FIG. 8 is the engine side and the right side is the transmission side. The rotor is composed of a rotor shaft 10 and a rotor sleeve 11, and a first damper including a driven plate 30, an outer spring 32, an inner spring 33, and a cover plate 31 to the right thereof. units are arranged. To the right thereof, a second damping unit including a front cover plate 40, an outer spring 42, an inner spring 43, a splined hub 50, and a rear cover plate 41 is arranged. The driven plate 30 and the front cover plate 40 are coupled to each other by an inner rivet 24 .

An inner welded portion 13 is formed between the rotor shaft 10 and the rotor sleeve 11, and an outer welded portion 12 is formed between the rotor sleeve 11 and the cover plate 31. An elastic washer 20, friction washers 21 and 22, and a bush 23 are assembled inside.

When the rotor rotates due to torsional vibration of the engine, the cover plate 31 fixed to the rotor sleeve 11 rotates and the vibration is primarily damped by the springs 32 and 33 of the first damping unit. When the vibration width exceeds the elastic force of the first damping unit, the driven plate 30 rotates, and the front cover plate 40 of the second damping unit fixed to the driven plate 30 rotates together with the spring of the second damping unit. Second order damping is achieved by fields 42 and 43. In this process, the center hole surface 34a of the driven plate 30 slides while being in contact with the sliding surface 54 of the spline hub 50 . At this time, since the center hole surface 44a of the front cover plate 40 is radially spaced from the sliding surface 54, contact friction does not occur.

9 is a half cross-sectional view of a vibration damping device according to another embodiment of the present invention, in which the spline hub 50 does not have a sliding shaft, instead of sliding surface 15 of sliding shaft 14 of rotor shaft 10 ) has a structure in which the center hole surface 34a of the driven plate 30 and the mutually sliding rotation are possible. Similarly, the center hole surface 44a of the front cover plate 40 is radially offset from the sliding surface 15 so that contact friction does not occur.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative and not restrictive. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1: vibration damping device 10: rotor shaft
11: rotor sleeve 12: outer weld
13: inner welded portion 14, 51: slide shaft
15, 54: sliding surface 20: elastic washer
21, 22: friction washer 23: bush
24: inner rivet 25: outer rivet
30, 30 ': driven plate 31: cover plate
32, 42: outer spring 33, 43: inner spring
34, 44: center hole 34a, 44a: center hole surface
35, 45, 47: coupling hole 36, 46: oil flow hole
36 ', 53: oil flow groove 40: front cover plate
41: rear cover plate 50: spline hub
52: spline part 55: through hole

Claims (12)

A vibration damping device comprising two or more damping units connected in parallel and arranged coaxially, each comprising at least one input and one output, comprising:
The output of the first damping unit and the input of the second damping unit are coupled so as to be fixed to each other in the rotational direction;
The output part of the first damping unit and the input part of the second damping unit each have a center hole through which a sliding axis can pass, and the diameters thereof are different from each other,
When the output part of the first damping unit and the input part of the second damping unit are aligned on the slide shaft in a state of coupling with each other, the one having the smaller diameter center hole of the two is the surface of the center hole is the sliding surface of the slide shaft while having a larger diameter central hole, the surface of the central hole is configured to be radially spaced from the sliding surface.
vibration damping device. According to claim 1,
Among the output of the first damping unit and the input of the second damping unit, the one having the larger axial thickness of the center hole has the smaller diameter center hole.
vibration damping device. According to claim 1,
Further comprising a cylindrical member arranged to abut the sliding surface of the sliding shaft, wherein the central hole surface of the one having the smaller diameter central hole is configured to abut the cylindrical member instead of the sliding surface.
vibration damping device. According to claim 1,
The slide shaft is a spline hub
vibration damping device. According to claim 1,
The sliding axis is a rotor shaft
vibration damping device. According to claim 4,
The output unit of the first damping unit and the input unit of the second damping unit have a coupling hole at a position corresponding to each other, and the spline hub has a through hole at a position corresponding to the coupling hole.
vibration damping device. According to claim 1,
Shaft alignment processing is performed only for a center hole having a smaller diameter among the output part of the first damping unit and the input part of the second damping unit.
vibration damping device. According to claim 7,
The axis alignment processing may be performed before the output of the first damping unit and the input of the second damping unit are coupled to each other.
vibration damping device. According to claim 6,
Assemble the second damping unit by coupling the input and output parts of the second damping unit from both sides with parts including the spline hub interposed therebetween, and then coupling the output of the first damping unit to the input of the assembled second damping unit That can be
vibration damping device. According to claim 9,
A coupling means can be applied through the through hole of the spline hub when coupling the output of the first damping unit to the input of the assembled second damping unit.
vibration damping device. According to claim 1,
An oil flow groove is provided on the surface of the center hole of the first damping unit
vibration damping device. According to claim 1,
An oil flow groove is provided on the sliding surface of the sliding shaft
vibration damping device.

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