KR20160126687A - Torque fluctuation absorbing damper - Google Patents

Torque fluctuation absorbing damper Download PDF

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Publication number
KR20160126687A
KR20160126687A KR1020150058083A KR20150058083A KR20160126687A KR 20160126687 A KR20160126687 A KR 20160126687A KR 1020150058083 A KR1020150058083 A KR 1020150058083A KR 20150058083 A KR20150058083 A KR 20150058083A KR 20160126687 A KR20160126687 A KR 20160126687A
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KR
South Korea
Prior art keywords
ring
pulley
shaped mass
aluminum
elastic body
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Application number
KR1020150058083A
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Korean (ko)
Inventor
마사카즈 세키네
노부히코 나리타
Original Assignee
엔오케이 가부시키가이샤
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Priority to KR1020150058083A priority Critical patent/KR20160126687A/en
Publication of KR20160126687A publication Critical patent/KR20160126687A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
    • F16F15/124—Elastomeric springs
    • F16F15/126—Elastomeric springs consisting of at least one annular element surrounding the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Pulleys (AREA)

Abstract

The present invention provides a torque fluctuation absorption damper with improved abrasion resistance and corrosion resistance. A ring-shaped mass (3) is connected through a first elastic body (6) to the outer circumference of a hub (1). A pulley supported to be rotated through a bearing (8) by the ring-shaped mass (3) is connected to the ring-shaped mass (3) through a second elastic body (9). At least one side of the ring-shaped mass (3) and the pulley (7) is made of surface-cured aluminum or an aluminum alloy through hard aluminate treatment or a hard chrome plating process.

Description

TECHNICAL FIELD [0001] The present invention relates to a torque fluctuation absorbing damper,

The present invention relates to an automatic transmission which transmits a torque from a drive shaft of a rotating machine such as a crank shaft of an automotive engine to another rotating machine and absorbs fluctuations in its rotational speed and absorbs vibration of the drive shaft The present invention relates to a torque fluctuation absorption damper.

A pulley provided at a tip end of a crankshaft of an internal combustion engine of an automobile is provided with a torque fluctuation absorbing mechanism for absorbing torque fluctuation and smoothing transmission torque. The torque fluctuation absorbing damper includes a hub formed of a cast iron or sheet metal press formed body attached to a shaft end of a crankshaft of an internal combustion engine for an automobile and rotating integrally with the hub, Wherein the dynamic damper portion has a structure in which a ring mass formed of a hub made of a cast iron or a sheet metal press molded body or the like and a cast iron disposed on the outer periphery thereof is elastically connected through the first elastic body . The coupling portion may include a pulley formed of a cast iron or a sheet metal press formed body or the like supported on the outer periphery of the hub or the ring-shaped mass body through a bearing made of a synthetic resin, and a ring-shaped mass body or hub elastically connected .

The torque fluctuation absorbing damper is characterized in that the dynamic damper portion constituted by the first elastic body and the ring-shaped mass body is deformed by the dynamic absorption effect caused by resonance in the circumferential direction in a predetermined frequency band region, The peak of the vibration is reduced and the drive torque input from the crankshaft to the hub is transmitted to the pulley while absorbing the torque fluctuation by the circumferential shear deformation action of the second elastic body in the coupling portion.

Further, as a typical prior art of the torque fluctuation absorbing damper, for example, there is one as disclosed in the following prior art documents.

Japanese Patent Application Laid-Open No. 2008-2613

Conventionally, a casting or a steel plate is widely used for a component of this type of torque fluctuation absorbing damper, and since the number of parts is large, the weight of the product is large and the fuel consumption is deteriorated. The use of aluminum as the material of these parts makes it possible to reduce the weight. However, aluminum has a lower abrasion resistance than castings and steel plates, and wear of the poly V groove due to friction with the V belt wound around the poly V groove of the pulley Or abrasion due to sliding with bearings or iron parts occurs, and the product function may be damaged early. In addition, there is a problem that electrolytic corrosion occurs due to a difference in ionization tendency when water or the like intrudes at a part where aluminum parts and iron-based parts are mixed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a technical object of the present invention to provide a torque fluctuation absorbing damper which is light in weight and has improved wear resistance and corrosion resistance.

As a means for effectively solving the above-mentioned technical problem, a torque fluctuation absorbing damper according to the invention of claim 1 is characterized in that a ring-shaped mass body is connected to an outer periphery of a hub through a first elastic body, Wherein at least one of the ring-shaped mass and the pulley is made of an aluminum or aluminum alloy surface-hardened (hardened), and the pulley is a torque fluctuation absorption damper connected to the ring-shaped mass via a second elastic body will be.

In the torque fluctuation absorbing damper according to the invention of claim 2, in the constitution described in claim 1, the surface hardening treatment is a hard alumite treatment or a hard chrome plating treatment.

The torque fluctuation absorbing damper according to claim 3 is the torque fluctuation absorbing damper according to claim 1 or 2, wherein both the ring-shaped mass and the pulley are made of aluminum or aluminum alloy, and one of them And the other member not sliding with the bearing is rust-proofed by surface treatment means other than the surface hardening treatment.

The torque fluctuation absorbing damper according to claim 4 is the torque fluctuation absorbing damper according to any one of claims 1 to 3, wherein the bearings are held by one of the pulleys and the ring-shaped masses of aluminum or aluminum alloy, The projections formed by the plastic working are prevented from dropping out.

According to the torque fluctuation absorption damper of the present invention, by using aluminum or aluminum alloy whose surface hardening treatment is applied to at least one of the ring-shaped mass body and the pulley, weight reduction can be achieved, wear resistance is ensured, It is possible to effectively suppress the occurrence of electrolytic corrosion, rust, and the like due to the intervening process. Further, since aluminum or aluminum alloy has excellent thermal conductivity, heat dissipation is improved and durability of the first elastic body or second elastic body can be improved.

When both of the ring-shaped masses and the pulleys are made of aluminum or an aluminum alloy, only one of the ring-shaped masses and the pulleys sliding on the bearings is surface-hardened, and the other member Is rust-proofed by an inexpensive surface treatment means other than the surface hardening treatment, an increase in cost can be suppressed.

Further, by making the pulleys of aluminum or an aluminum alloy, it is possible to easily provide protrusions for preventing the radial bearing, which is disposed on the inner circumferential surface thereof, from coming off, by plastic working.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional perspective view showing a first embodiment of a torque fluctuation absorbing damper according to the present invention, which is cut along a plane passing an axis. Fig.
Fig. 2 is a partial cross-sectional perspective view showing the coupling portion according to the first embodiment cut along a plane passing through the axis. Fig.
Fig. 3 is a cross-sectional perspective view showing a second embodiment of the torque fluctuation absorption damper according to the present invention, which is cut along a plane passing the shaft center. Fig.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a torque fluctuation absorption damper according to the present invention will be described with reference to the drawings. In the following description, the term " front side " refers to the front side of the vehicle while the left side in each drawing, and " rear side " means that there is an internal combustion engine Side.

First, Fig. 1 shows the first embodiment, and reference numeral 1 denotes a hub attached to a crankshaft (not shown) of an internal combustion engine for an automobile. The hub 1 is made of a cast iron material or aluminum or an aluminum alloy and has a boss portion 1a into which the shaft end of the crankshaft is inserted and a boss portion 1a extending from an end portion of the front side of the boss portion 1a A ring shaped step portion 1b extending toward the outer diameter side and an outer cylindrical portion extending in a cylindrical shape concentric with the boss portion 1a from the outer periphery toward the front side, (1c). A key groove 1d is formed on the inner peripheral surface of the boss portion 1a.

A ring-shaped mass body 3 and a pulley angle 4 fitted to the outer circumferential surface of the sleeve 2 and a pulley angle 4 are provided on the outer peripheral side of the outer cylindrical portion 13 of the hub 1, A coupling angle 5 fitted with a fitting is disposed. The sleeve 2 is made of steel and has a simple cylindrical shape. A first elastic body 6 is integrally formed between the sleeve 2 and the outer cylinder portion 13 of the hub 1 Vulcanization).

The ring-shaped mass body 3 is made of aluminum or an aluminum alloy and has an inner circumferential tubular portion 3a which is press-fitted into the outer circumferential surface near the front surface of the sleeve 2, And a support cylindrical portion 3c extending from the vicinity of the outer periphery of the disc portion 3b to the back side. A plurality of thick portions (thick portions) 3d having a larger thickness in the radial direction are formed in the support cylindrical portion 3c in an equally spaced (equidistant) manner in the circumferential direction in order to secure a necessary inertia mass.

The pulley angle 4 is an iron press formed body and has an attaching barrel 4a which is press-fitted into the outer circumferential surface near the back surface of the sleeve 2 and a support flange portion 4b Is a substantially L-shaped cross-section.

The coupling angle 5 is a press formed of iron and has an attaching barrel 5a which is press-fitted to the outer circumferential surface of the inner cylindrical portion 3a of the ring-shaped mass body 3 and fitted thereon, and a conical surface And an outward flange portion 5b that is formed in the shape of a protrusion. The inner side surface of the disc portion 3b of the ring-shaped mass body 3 located on the front side of the outward flange portion 5b of the coupling angle 5 is also formed into a conical surface shape corresponding to the outward flange portion 5b Respectively.

The first elastic body 6 is made of a rubber-like elastic material (synthetic resin material having a rubber material or rubber-like elasticity) excellent in heat resistance, cold resistance and mechanical strength, The hub 1 and the sleeve 2 are set concentrically with each other and the outer circumferential surface of the outer circumferential cylinder portion 1c of the hub 1 and the inner circumferential surface of the sleeve 2 are fixed by mold clamping, (Cylindrically shaped) by heating and pressing the unvulcanized rubber material into the cavity defined between the outer circumferential surface of the sleeve 1c and the outer circumferential surface of the sleeve 2c ) On the inner circumferential surface.

The sleeve 2, the ring-shaped mass 3, the pulley angle 4 and the coupling angle 5 and the first elastic member 6 constitute a dynamic damper portion D and the dynamic damper portion D Of the first elastic body 6 are determined by the mass of the inertia caused by the sleeve 2, the ring-shaped mass 3, the pulley angle 4 and the coupling angle 5 integrally fitted to each other and the spring constant of the first elastic body 6 Is adjusted in accordance with a predetermined frequency band in which the twist angle of the crankshaft is maximized, that is, the natural frequency of the crankshaft in the torsional direction.

Reference numeral 7 denotes a pulley. The pulley 7 is made of aluminum or an aluminum alloy and has a pulley body 7a and an inwardly extending portion extending inwardly from the front side of the support flange portion 4b of the pulley angle 4 Shaped flange portion 7b extending from the outer peripheral portion of the front end of the pulley body 7a and supported on the outer periphery of the support cylindrical portion 3c of the annular mass body 3 through the radial bearing 8, And a support cylinder portion 7c.

The radial bearing 8 is made of a synthetic resin material having a low coefficient of friction and excellent in abrasion resistance such as PTFE (polytetrafluoroethylene). The radial bearing 8 has a cylindrical shape in which one portion in the circumferential direction is cut, Shaped mass body 3 and is slidably in contact with the outer circumferential surface of the support cylinder portion 3c of the ring-shaped mass body 3. The ring-

A poly-V groove 7d is formed on the outer peripheral surface of the pulley body 7a, and a V-belt (not shown) is wound. The end portion on the front side of the supported tube portion 7c and the outer diameter end portion of the disc portion 3b of the ring shaped mass body 3 are connected by a labyrinth located outside the radial bearing 8 ) Gap (L).

The outward flange portion 5b of the coupling angle 5 fitted to the ring-shaped mass body 3 and the inward flange portion 7b of the pulley 7 opposed axially from the rear face side thereof, Is elastically connected so as to be capable of relative displacement in a circumferential direction through a second elastic body (9) extending in a substantially cylindrical shape in a hollow portion of the coupling portion (3), whereby the coupling portion (C) .

The second elastic body 9 is made of a rubber-like elastic material (synthetic resin material having a rubber material or rubber-like elasticity) excellent in heat resistance, cold resistance and mechanical strength, and is provided with a coupling angle 5, (7b) of the pulley (7) is formed concentrically with the outer flange (5b) of the coupling angle (5) Is vulcanized and adhered to the outward flange portion 5b and the inward flange portion 7b simultaneously with the vulcanization molding by heating and pressing the unvulcanized rubber material.

The second elastic body 9 transmits the driving torque inputted to the hub 1 from the crankshaft to the pulley 7 while smoothening it by shear deformation in the circumferential direction and changes the torque fluctuation of the crankshaft Since the second elastic body 9 has a low spring constant and a large allowable deformation amount in the torsional direction and secures a torque transmitting force, , And the thickness in the axial direction and radial direction is large.

The rubber layer 9a turned from the second elastic body 9 is formed on the front side of the outward flange portion 5b of the coupling angle 5 so as to be in close contact with the inner surface of the disc portion 3b of the ring- Respectively.

A thrust bearing 10 is interposed between the support flange portion 4b of the pulley angle 4 and the inward flange portion 7b of the pulley 7. [ Like the radial bearing 8, the thrust bearing 10 is made of a synthetic resin material having a low friction coefficient and excellent in abrasion resistance such as PTFE, and is formed into a flat washer shape.

The ring-shaped mass 3 and the pulley 7 made of aluminum or an aluminum alloy are subjected to hard alumite treatment or surface hardening treatment by hard chromium plating.

The torque fluctuation absorbing damper having the above configuration is rotated together with the crankshaft of the internal combustion engine for an automobile and the drive torque is transmitted to the pulley body 7a of the pulley 7 via the V belt 7d To the rotary shaft of the auxiliary device. Since the ring-shaped mass body 3 and the pulley 7 are made of a light metal aluminum or an aluminum alloy, the weight of the product can be reduced and the fuel consumption can be improved.

Since the ring-shaped mass body 3 has the plurality of thick portions 3d formed in the support cylindrical portion 3c in an equidistant manner in the circumferential direction, the center of gravity of the ring-shaped mass body 3 is relatively localized A sufficient inertial mass is ensured in spite of the light weight, and therefore, a damping torque of a sufficient magnitude against the torque of the torsional vibration of the input crankshaft can be obtained.

Here, the dynamic damper section D resonates in the circumferential direction in the frequency band in which the twist angle is maximized by the resonance of the crankshaft, and the torque due to the resonance is opposite to the torque and direction of the input vibration. By this dynamic damping action, the peak of the twist angle due to the resonance of the crankshaft can be effectively reduced.

The torque fluctuation remarkably generated in the crankshaft in the low rotation range is transmitted to the hub 2 via the first elastic body 6 from the hub 1 and the sleeve 2 and the ring- And the coupling angle 5 and is also transmitted from the coupling angle 5 to the pulley 7 via the second elastic body 9. Here, since the circumferential shear spring constant of the second elastic body 9 is significantly low, shear deformation is repeatedly repeated in the circumferential direction according to the input torque variation, and the torque variation is converted into heat energy. Therefore, the transmission torque to the V-belt wound around the pulley body 7a (poly-groove 7d) of the pulley 7 is smoothed.

Here, according to the dynamic damping action of the dynamic damper portion D, the first elastic body 6 undergoes shearing deformation repeatedly in the circumferential direction between the outer circumference cylinder portion 13 of the hub 1 and the sleeve 2 And a part of the heat is conducted from the sleeve 2 to the ring-shaped mass body 3 and discharged from the ring-shaped mass body 3 into the outside air. At this time, in addition to being made of aluminum or aluminum alloy excellent in thermal conductivity, the ring-shaped mass body 3 has a wide contact surface with the outside air in the disc portion 3b, so that heat radiation to the outside air is satisfactorily performed. Therefore, deterioration of the first elastic body 6 due to heat accumulation can be effectively prevented.

On the other hand, also in the coupling portion C, the second elastic body 9 generates heat by repeated shearing deformation in the circumferential direction between the coupling angle 5 and the inward flange portion 7b of the pulley 7 , A part of the heat is conducted to the inward flange portion 7b of the pulley 7 or the other portion of the heat is conducted to the ring shaped mass 3 through the coupling angle 5, And the ring-shaped mass body 3 to the outside air. At this time, in addition to the fact that the pulley 7 and the ring-shaped mass body 3 are made of aluminum or an aluminum alloy excellent in thermal conductivity, the disc portion 3b of the ring-shaped mass body 3 and the inward flange portion 7b have a wide contact surface with the outside air, the heat radiation to the outside air is satisfactorily performed. Therefore, deterioration of the second elastic body 9 due to heat accumulation can be effectively prevented.

A part of the air present in the ring-shaped space S surrounded by the ring-shaped mass 3, the pulley 7 and the second elastic body 9 is radially compressed by the thermal expansion when the temperature rises, Outside through the clearance of the sliding portion of the shape mass body 3 with the supporting cylinder portion 3c and at the time of the subsequent lowering of temperature, external air flows through the gap of the sliding portion by cooling shrinkage. In addition, foreign matter such as dust adhered to the labyrinth gap L on the outside of the radial bearing 8 may be sucked in when the outside air flows in, thereby damaging the sliding portion. On the other hand, in the illustrated embodiment, as described above, since the ring-shaped mass body 3 and the pulley 7 have high heat dissipation properties, the temperature difference between the cold and the hot becomes small. As a result, It is possible to reduce the negative pressure at the time of deterioration and to suppress invasion of dust and the like.

Since the pulley 7 is hardened by hard alumite treatment or hard chrome plating, wear of the poly-V groove 7d of the pulley body 7a due to micro-slip of the V-belt and wear of the thrust bearing 10 The wear of the inward flange portion 7b due to the sliding of the inward flange portion 7b is effectively suppressed. Similarly, since the ring-shaped mass body 3 is hardened by hard alumite treatment or hard chrome plating, abrasion of the outer circumferential surface of the support cylinder portion 3c by sliding with the radial bearing 8 is effectively suppressed.

The ring-shaped mass 3 (3), which is hard alumite-treated or hard chrome-plated, is in contact with the surface of the ring-shaped mass body 3 on which the sleeve 2 and the inner cylindrical portion 3a are fitted. ) Is made of a hard and highly insulating film, electrolytic corrosion can be effectively prevented when water is interposed between the inner sleeve 3a and the iron sleeve 2.

2, since the radial bearing 8 is disposed on the inner periphery of the to-be-supported sleeve portion 7c of the pulley 7 since the aluminum or aluminum alloy is easy to be subjected to the plastic working, The ends 7e of the cylindrical portion 7c are deformed in the axial direction by a punch at a plurality of circumferential positions and buckling distorsion is performed to prevent the radial bearing 8 from coming off. Can be easily formed.

Next, Fig. 3 shows a second embodiment of the torque fluctuation absorption damper according to the present invention. A description will be given of a point different from the first embodiment described above in the second embodiment in that the to-be-supported tubular portion 7c of the pulley 7 is extended from the inner peripheral portion of the front end of the pulley body 7a And the support cylinder portion 3c of the ring-shaped mass body 3 extends so as to surround the outer circumferential side of the supported cylinder portion 7c of the pulley 7 and the end portion on the back side thereof is connected to the pulley body 7a And a radial bearing 8 disposed on the inner circumferential surface of the support cylinder portion 3c of the ring-shaped mass body 3 is opposed axially with the labyrinth gap L interposed therebetween. And is slidably in contact with the outer peripheral surface. The plurality of thick portions 3d formed in the support cylindrical portion 3c of the ring-shaped mass body 3 in the circumferential direction in the circumferential direction are thicker in the outer diameter direction (larger in diameter).

The ring-shaped mass body 3 and the pulley 7 are all made of aluminum or an aluminum alloy. The pulley 7 is subjected to a hard anodizing treatment or a surface hardening treatment by hard chromium plating, The ring-shaped mass body 3 is subjected to surface treatment by chromic acid treatment or the like to improve corrosion resistance and prevent electrolytic corrosion.

Otherwise, the configuration can be basically the same as that of the first embodiment.

The torque fluctuation absorbing damper of the second embodiment realizes the same effects as those of the first embodiment and further provides a sliding surface between the radial bearing 8 and the thrust bearing 10 on the belt sliding surface 7d), the hard alumite treatment or the hard chrome plating is performed only on the pulley 7 in consideration of the improvement of the corrosion resistance and the prevention of electrolytic corrosion as well as the improvement of the abrasion resistance of the pulley 7 , And the ring-shaped mass 3 free of the sliding portion is sufficient for the surface treatment by the inexpensive chromic acid treatment or the like, it is possible to realize the specification in which the cost increase is suppressed.

That is, since the pulley 7 is surface-hardened by hard alumite treatment or hard chrome plating, wear of the poly-V groove 7d of the pulley body 7a due to the micro-slip of the V-belt and wear of the thrust bearing 10 Wear of the inward flange portion 7b due to sliding with the radial bearing 8 and abrasion of the outer circumferential surface of the outer cylindrical portion 7c due to sliding with the radial bearing 8 are effectively suppressed.

The surface of the ring-shaped mass body 3 which is surface-treated by chromic acid treatment or the like is in contact with the inner circumferential surface of the ring-shaped mass body 3, Since the surface of the cylindrical portion 3a is made of a film having a high rust-preventive force, electrolytic corrosion between the surface of the cylindrical portion 3a and the iron sleeve 2 can be effectively prevented.

In the second embodiment, the thick portion 3d of the ring-shaped mass body 3 is present on the outer peripheral side of the to-be-supported cylindrical portion 7c and the radial bearing 8 of the pulley 7, 3 are deviated more toward the outer circumferential side than in the first embodiment, a larger inertia mass can be ensured.

In the present embodiment as well, the rear end side of the ring-shaped mass body 3 holding the radial bearing 8 on its inner periphery in the support cylinder portion 3c is pushed in a plurality of positions in the circumferential direction It is possible to easily form a projection (not shown) as shown in Fig. 2 for preventing the radial bearing 8 from coming off by buckling and deforming.

One; Herb
2; sleeve
3; Ring-shaped mass
4; Pulley angle
5; Coupling Angle
6; The first elastic body
7; Pulley
8; Radial bearings
9; The second elastic body
10; Thrust bearing

Claims (4)

A ring-shaped mass is connected to the outer periphery of a hub via a first elastic body, and a pulley rotatably supported on the ring-shaped mass via a bearing is connected to the ring-shaped mass via a second elastic body, The absorbing damper according to claim 1, wherein at least one of the ring-shaped mass and the pulley is made of aluminum or an aluminum alloy whose surface is hardened (hardened). The method according to claim 1,
Wherein the surface hardening treatment is performed by a hard alumite treatment or a hard chrome plating treatment. 3. The method according to claim 1 or 2,
The ring-shaped mass and the pulley are made of aluminum or an aluminum alloy. Among them, one of the members sliding on the bearing is surface hardened, and the other member not sliding with the bearing And rust proofing is performed by surface treatment means other than surface hardening treatment. 4. The method according to any one of claims 1 to 3,
Characterized in that the bearings are held by one of the pulleys and the ring-shaped masses of aluminum or an aluminum alloy, and the one or more members are prevented from being dislodged by projections formed by plastic working Damper.
KR1020150058083A 2015-04-24 2015-04-24 Torque fluctuation absorbing damper KR20160126687A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021124819A1 (en) * 2019-12-20 2021-06-24 Nok株式会社 Torsional damper

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008002613A (en) 2006-06-23 2008-01-10 Nok Corp Rotation fluctuation absorbing damper

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008002613A (en) 2006-06-23 2008-01-10 Nok Corp Rotation fluctuation absorbing damper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021124819A1 (en) * 2019-12-20 2021-06-24 Nok株式会社 Torsional damper
US11913515B2 (en) 2019-12-20 2024-02-27 Nok Corporation Torsional damper

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