DE102020129119A1 - PULLEY DAMPER - Google Patents

Abstract

The present invention relates to a pulley damper (100) which is characterized by comprising a pulley (110) having a cylindrical portion on the outer diameter side and a belt groove formed on the outer diameter surface of the cylindrical portion; a cover (150) that forms a space inside with the pulley (110), a plurality of arc springs (130) aligned along the circumferential direction in the space between the pulley (110) and the cover (150), an input flange ( 170) with a plurality of detent projections that protrude radially outwardly to press against the end of the bow spring (130) during rotation, and a vibration damper unit (190) which is provided on one side of the pulley (110) and is provided with a vibration damper body (192) and an annular rubber vibration damper (191), which is attached to the outer side in the radial direction of the vibration damper body (192), wherein it has a structure which is driven in rotation via an output member (200) and in which relative rotation of the pulley (110) and the input flange (170) compresses the bow spring (130); further comprising a sound absorbing member (160) having a sound absorbing body (163) and inserted into the inner diameter surface of the cylindrical portion of the pulley (110); wherein the soundproofing body (163) is made of a rubber material and comprises a first soundproofing projection (1631) which is protrudingly extended in the direction of the vibration damper unit (190) and the end portion of which is opposite to the vibration damper unit (190).

Description

Background of the invention

The present disclosure relates to a pulley damper, and more particularly to a pulley damper in which the emission of resonance noise and operation in the resonance region are suppressed and the emitted noise is reduced by absorbing the emitted sound.

Description of the related art

When describing the pulley damper with reference to of Korean Patent Laid-Open Gazette No. 10-2011-0131197 (hereinafter referred to as 'Offenlegungsblatt 1') (in the description reference numbers from Offenlegungsblatt 1 are used), the pulley damper (10) is shown in operation with a motor vehicle engine (12) which has an auxiliary drive (14) with a large number of engine accessories ( 16) as shown. The pulley damper (10) is coupled to an output element (18) of the engine (12) (e.g. a crankshaft) and transmits the rotational force via an infinite power transmission element (20), such as a belt or a chain, to the drive element, such as a Pulley or sprocket to drive the motor accessory (16).

In to of Korean Patent Laid-Open Gazette No. 10-2013-0129237 (hereinafter referred to as “Disclosure Sheet 2”) a more detailed description of the pulley damper is given.

The pulley damper can be formed in a shape in which the input flange (17) and the vibration damper unit (19) are coupled to each other, as in FIG shown so that the pulley (11) can perform a relative rotational movement with respect to the input flange (17). Also, as in of Laid-Open Gazette 2 can be coupled to the vibration damper, and the pulley can be shaped so that it can perform a relative rotational movement with respect to the input flange.

As in As shown, the conventional pulley damper (10) includes a pulley (11). The belt pulley (11) is coupled to the input flange (17) via an arc spring (13). The input flange (17) has a plurality of locking projections which protrude radially outward in a circular shape and are hooked onto the ends of the bow spring (13). The pulley (11) can be rotated around the axis of rotation relative to the input flange (17), and when the pulley (11) moves relative to the input flange (17), the bow springs (13) are caught by the locking projection of the bow spring (13) and compressed to store energy and release energy as you expand. The input flange (17) is connected to an output element (20) (for example a crankshaft of an automobile engine), which is a drive shaft, for example by screwing.

A slide bearing (21) is provided between the output element (20) and the belt pulley (11). The output element (20) can rotate relative to the belt pulley (11). The plain bearing (24) is arranged in the radial direction between the output element (20) and the flange provided in the radial direction of the belt pulley (11).

The pulley (11) forms a receiving chamber in which several bow springs (13) are arranged. The receiving chamber is largely covered by a cover (15). A cylindrical flange provided on the outside in the radial direction of the cover (15) is inserted into the pulley (11) by sliding.

The vibration damper unit (19) has the following properties: a vibration damper in the metal housing (19-2), which is essentially disk-shaped and has a flange portion which is bent outward in the radial direction to one side; a substantially annular rubber vibration damper (19-1) coupled to the flange portion of the vibration damper body (19-2); a metallic vibration damping ring (19-3) into which the rubber vibration damper (19-1) is inserted and coupled.

A vibration damper unit (19) is connected to the output element (20). The vibration damper unit (19) is fastened to the input flange (17) with fastening screws (18) and connected to the output element (20). A through hole is formed in the vibration damper body (19-2) through which the fastening screw (18) is fastened.

The fastening screws (18) are arranged at several intervals in the circumferential direction.

The cover (15) is located between the vibration damper unit (19) and the belt pulley (11).

The output element (20) is inserted into the drive flange (17) and into the vibration damper body (19-2). The fastening screw (18) is fastened at a position radially from the end with the inner diameter of the input flange (17) and of the vibration damper body (19-2) is spaced apart. The input flange (17) and the vibration damper body (19-2) have a shape in which portions of the side ends with inner diameter are in close contact with each other and are bent radially outward in a direction away from each other after passing through a portion that is fastened by a fastening screw (18) so that the end of the inner diameter of the cover (15) is spaced from the input flange (17) or the vibration damper body (19-2).

A diaphragm spring (14) made of a metal material in the form of an annular plate is provided between the cover (15) and the vibration damper unit (19). A coupling member (12) made of rubber is connected to the end of the inner diameter of the cover (15), and a part of the coupling member (12) is inserted into the diaphragm spring (14). A blocking member (14-1) made of a rubber material is connected to an end portion on the side on the outer diameter of the diaphragm spring (14).

In order to prevent the resonance noise generated by the pulley damper (10) according to the prior art described above from being radiated to the outside, the gap between the vibration damper unit 19 and the pulley (11) should be reduced. However, due to the assembly tolerance, it is not easy to keep the gap as small as possible. Since the pulley damper can have an operating frequency and a natural frequency in the resonance range, there is a problem of vibration due to resonance.

Prior art literature

Patent literature

• (Patent Literature 0001) Korean Patent Laid-Open Gazette No. 10-2011-0131197
• (Patent Literature 0002) Korean Patent Laid-Open Gazette No. 10-2013-0129237

Summary of the invention

Problem to Solve

In order to solve the above-described problems in the prior art, the present disclosure is directed to providing a pulley damper in which the emission of resonance noise is suppressed and the operation in the resonance region is prevented.

Means of solving the problems

For the above purposes, the present disclosure provides a pulley damper comprising a pulley with a cylindrical portion on the outer diameter side and a belt groove formed on the surface of the cylindrical portion on the outer diameter, a cover that internally forms a gap with the pulley , may include a plurality of arc springs circumferentially aligned in the space between the pulley and cover, an input flange with a plurality of locking projections that protrude radially outward to urge the end of the arc spring during rotation, and a vibration damper unit , which is provided on one side of the pulley and is equipped with a vibration damper body and an annular rubber vibration damper which is coupled to the outside in the radial direction of the vibration damper body, the pulley damper by a Output element for Rotation is driven and the bow spring is compressed by relative rotation between the pulley and the input flange; the vibration damper body may further comprise an annular vibration damping ring which is inserted radially outside of the rubber vibration damper and has an outer diameter which is larger than the outer diameter of the pulley, and the vibration damping ring may further comprise a cover protrusion protruding in the axial direction and part of the outer diameter the pulley, so that radial and axial gaps are formed between the vibration damping ring and the pulley.

On the other hand, the present disclosure provides a pulley damper comprising a pulley having a cylindrical portion on the outer diameter side and a pulley groove formed on the surface of the cylindrical portion at the outer diameter, a cover internally spaced with the pulley, a plurality of arc springs, which are circumferentially aligned in the space between the pulley and the cover, an input flange with a plurality of locking projections which protrude radially outwardly to urge the end of the bow spring during rotation, and a vibration damper unit, which on one side of the Pulley is provided with a vibration damper body and an annular rubber vibration damper coupled to the outside in the radial direction of the vibration damper body, the pulley damper being driven to rotate by an output member and the bow spring is compressed by relative rotation between the pulley and the input flange; and may further comprise a soundproofing member inserted into the inner diameter surface of the cylindrical portion of the pulley and having a soundproofing body; the soundproofing body is made of a rubber material and protrudes toward the vibration damper unit and forms a pulley damper with a first soundproofing projection protruding and extending toward the vibration damper unit with its end facing the vibration damper unit.

In the above example, the vibration isolating unit further comprises an annular vibration isolating ring which is inserted radially outside of the rubber vibration damper and has an outer diameter larger than that of the pulley, the vibration isolating ring further comprising a cover protrusion protruding in the axial direction inside the axial direction, to cover part of the outer diameter of the pulley, and is characterized in that the radial and axial gaps are formed between the vibration damping ring and the pulley.

In the above example, the sound insulation element has a sound insulation beam, and the sound insulation housing is characterized in that it is coupled to the sound insulation beam by using the sound insulation beam as an insert.

In the above example, the soundproofing beam comprises a support body insert part inserted into the inner diameter surface of the cylindrical portion of the pulley, and a support body extension part extending radially inward from the inner end of the support body insert part; The first sound-absorbing projection is characterized in that the axial direction towards the vibration damper is lengthened by the sound-absorbing body, which is coupled to the support extension.

The above example is characterized in that a plurality of soundproofing protrusions are formed radially inside the first soundproofing protrusion.

In the above example, the cover has a cover flange which is inserted into the cylindrical portion of the pulley radially outward; an annular insert made of a rubber material is further provided between the cover flange and the cylindrical portion of the pulley; The insert member is characterized in that it is provided by being pressed through the cylindrical portion of the cover flange and the pulley from inside and outside the radial direction.

Effect of the invention

According to a pulley damper ( 100 ) of the present invention, it suppresses the emission of resonance noise and operation in the resonance range, and provides a noise-reducing effect by absorbing the radiated sound and an effect of preventing oil pollution. In addition, it has a structure superimposed in the axial direction to suppress noise emissions and further oil spillage.

Figure list

• is a half section showing a conventional pulley damper,
• Fig. 13 is a schematic half-sectional view showing another example of the pulley damper of the invention;
• is an enlarged part "A" of , a modified example of the invention,
• is an enlarged view "A" of FIG , another modified example of the invention,
• Fig. 13 is a partially enlarged cross-sectional view showing a modified example of the sound absorbing member provided in the pulley damper of the invention.

Specific content to embody the invention

A pulley damper of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 13 is a schematic half-sectional view showing another example of the pulley damper of the invention; is an enlarged part "A" of , a modified example of the invention, is an enlarged view "A" of FIG , another modified example of the invention, and Fig. 13 is a partially enlarged cross-sectional view showing a modified example of the sound absorbing member provided in the pulley damper of the invention.

In the following description, the horizontal direction of described as the axial direction. The one described below Rubber material includes a material with physical properties such as rubber or rubber.

A pulley damper ( 100 ) of the present invention may include: A pulley ( 110 ) having a cylindrical portion on the outer diameter side and a belt groove formed on the outer diameter surface of the cylindrical portion; a cover ( 150 ) connected to the pulley ( 110 ) forms a space therein; a variety of bow springs ( 130 ) along the circumferential direction in the space between the pulley ( 110 ) and the cover ( 150 ) are aligned; an inlet flange ( 170 ) with a plurality of locking projections, which protrude in the radial direction outward, around the end of the bow spring ( 130 ) to press while rotating; a vibration damper unit ( 190 ) on one side of the pulley ( 110 ) is provided and has a vibration damper body (192) and an annular rubber vibration damper (191) which is coupled to the outside in the radial direction of the vibration damper body (192);

The pulley damper ( 100 ) is driven by the output element ( 200 ) driven in rotation, and the bow spring ( 130 ) is determined by the relative rotation of the pulley ( 110 ) and the drive flange ( 170 ) pressed together. The specific shape and compression structure of the bow spring ( 130 ) are conventionally known techniques, so a description is omitted.

As in shown are the inlet flange ( 170 ) and the vibration damper body (192) fastened by a coupling screw, with the output element ( 200 ) coupled and rotated integrally. The output element ( 200 ) is in the side with the inner diameter of the drive flange ( 170 ) and the vibration damper body (192) are used. The coupling screws are spaced from each other along the circumferential direction and are fixed at a plurality of points.

The pulley ( 110 ) has an inner flange portion parallel to the cylindrical portion on the inner diameter side. The output element ( 200 ) is in the inner flange part of the pulley ( 110 ) used. The plain bearing ( 210 ) is between the inner flange part of the pulley ( 110 ) and the output element ( 200 ) arranged. On the side of the inner diameter of the end of the pulley ( 110 ) in the direction of the vibration damper unit ( 190 ) of the cylindrical section of the pulley ( 110 ) a tapered portion is formed where the interval increases as it moves inward.

The vibration damper body (192) is annular. The vibration damper body (192) has a cylindrical vibration body flange which is bent on the side at the outer diameter. The vibrating body flange is inserted into the rubber vibration damper (191).

The vibration damper unit ( 190 ) further comprises a metallic vibration damper ring (193) which is connected to the side on the outer diameter of the rubber vibration damper (191). The outer diameter of the rubber vibration damper (191) can, as in shown, be formed in an irregular shape, and the maximum outer diameter of the rubber vibration damper (191) is smaller than the inner diameter of the cylindrical part of the pulley ( 110 ).

The outer diameter of the vibration damper ring (193) is larger than that of the belt pulley ( 110 ).

On the other hand, the invention comprises a soundproofing element (160) with a soundproofing body (163) which is inserted into the surface of the inner diameter of the cylindrical part of the pulley ( 110 ) is to be introduced. The soundproofing body (163) is made of a rubber material and includes a first soundproofing projection (1631) with an end portion which the vibration damper unit ( 190 ) by protruding towards the vibration damper unit ( 190 ) extends. When the soundproofing member (160) is included, the noise generated from inside is prevented from being discharged to the outside. The sound insulation element (160) comprises a sound insulation support (161), and the sound insulation body (163) is coupled to the sound insulation support (161), the sound insulation support (161) serving as an insert.

The first soundproofing protrusion (1631) may be in a radially inclined shape as shown in Diagram 2 or along an axial direction as in FIG represented, formed.

As in shown, the soundproofing support (161) comprises a support insert portion which is inserted into the surface with the inner diameter of the cylindrical portion of the pulley ( 110 ) is inserted, and a bracket extension extending in a radial direction from the inner end of the bracket insert portion inward. The first soundproofing projection (1631) extends in the axial direction in the direction of the vibration damper unit ( 190 ) from the sound insulation body (163), which is coupled to the beam extension unit. In the reference number 1633 denotes a second soundproofing projection 1633, which is shown in radial direction from the sound insulation body (163), which is coupled to the support extension, protrudes inward.

The first sound absorbing protrusion (1631) and the second sound absorbing protrusion (1633) protrude in a branched shape to form a concave part on the side of the inner diameter so that the sound generated inside reflects by the concave part and suppresses its radiation to the outside becomes.

On the inner surface of the first soundproofing projection (1631), a plurality of soundproofing projections (1631a) are formed in the radial direction, which protrude inward in the radial direction and whose cross-sectional area decreases towards the end. The protruding sound insulation part (1631a) may be provided on the inner surface of the sound insulation body (163) which is connected to the bracket insert part and protrudes inward in the radial direction. As described above, since the soundproofing protrusions (1631a) are formed on the inner surface of the soundproofing body (163) in the radial direction, the sound generated inside is reflected to the soundproofing protrusions (1631a) and prevented from being radiated to the outside.

What the cover ( 150 ), the flange part, which is provided in a shape bent on the side at the outer diameter, is inserted into the cylindrical part of the pulley ( 110 ) used.

The cover ( 150 ) is axially between the vibration damper unit ( 190 ) and the pulley ( 110 ) arranged. The vibration damper body (192) and the inlet flange ( 170 ) are formed with a portion attached to one of an inner end of the cover ( 150 ) is bent in a radial direction inwardly spaced position in a direction away from each other. The end of the inside diameter of the cover ( 150 ) is from the vibration damper body (192) and the inlet flange ( 170 ) spaced.

A coupling member (120), which is made of a rubber material and has a ring shape, can be connected to the inner end of the cover ( 150 ) are coupled in the radial direction.

A coupling member (120), which is made of a rubber material and has a ring shape, can be connected to the inner end of the cover ( 150 ) are coupled in the radial direction. The pulley damper ( 100 ) of the present invention can also be a diaphragm spring ( 140 ) included in the form of a ring plate. The diaphragm spring ( 140 ) is made of metal. The diaphragm spring ( 140 ) can also be made of plastic with high rigidity. A blocking element (141) made of a rubber material is attached to one end of the outer diameter of the diaphragm spring ( 140 ), and the blocking member (141) is provided so that it contacts the inner surface of the vibration damper body (192) in the axial direction. The diaphragm spring ( 140 ) is pressed axially from the inside by the coupling element (120) and axially pressed on from the outside by the blocking element (141).

The sound insulation element (160) is in the axial direction between the cover ( 150 ) and the vibration damper unit ( 190 ) arranged. The beam extension part of the soundproofing element (160) extends from the end of the lid side ( 150 ) of the carrier insert part radially inwards.

On the other hand, the pulley damper ( 100 ) of the present invention furthermore with an annular insert element (160-1) made of a rubber material between the cover flange and the cylindrical part of the pulley ( 110 ) Mistake. The insert element (160-1) is inserted through the cover flange and the cylindrical part of the pulley ( 110 ) pressed inside and outside in the radial direction. The insert element (160-1) can be provided in addition to the soundproofing element (160) described above.

Before pressing, the insert element (160-1) can have a rectangular cross-section as shown in diagram 3 or a circular cross-section as shown in diagram 4.

By providing an insert element (160-1) made of a rubber material that is pressed between the cover flange of the insert element (160-1) and the cylindrical portion of the pulley ( 110 ) is deformed, and thereby the natural frequency is moved away from the resonance frequency, so that vibration and noise increase due to resonance is suppressed.

List of reference symbols

100:

Riemenscheibendämpfer

110:

Riemenscheibe

130:

Bogenfeder

140:

Membranfeder

150:

Abdeckung

170:

Eingangsflansch

190:

Schwingungsdämpfereinheit

200:

Abtriebselement

210:

Gleitlage

Description of symbols:

100:

Pulley damper

110:

Pulley

130:

Bow feather

140:

Diaphragm spring

150:

cover

170:

Inlet flange

190:

Vibration damper unit

200:

Output element

210:

Sliding position

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• KR 1020110131197 [0002, 0014]
• KR 1020130129237 [0003, 0014]

Claims (6)

A pulley damper (100), characterized in that it comprises a pulley (110) with a cylindrical portion on the outer diameter side and a belt groove formed on the outer diameter surface of the cylindrical portion, a cover (150) having a space inside with the pulley (110) forms, a plurality of bow springs (130), which are aligned along the circumferential direction in the space between the pulley (110) and the cover (150), an input flange (170) with a plurality of locking projections that protrude in the radial direction outward to during the rotation against the end of the bow spring (130), and a vibration damper unit (190) which is provided on one side of the pulley (110) and is provided with a vibration damper body (192) and an annular rubber vibration damper (191), the is attached to the outside in the radial direction of the vibration damper body (192), wherein it is via a construct ion, which is driven to rotate via an output member (200) and in which the arc spring (130) is compressed by the relative rotation of the pulley (110) and the input flange (170); further comprising a sound absorbing member (160) having a sound absorbing body (163) and inserted into the inner diameter surface of the cylindrical portion of the pulley (110); wherein the soundproofing body (163) is made of a rubber material and comprises a first soundproofing projection (1631) which is protrudingly extended in the direction of the vibration damper unit (190) and the end portion of which is opposite to the vibration damper unit (190). Pulley damper (100) Claim 1 , wherein the rubber vibration damper (191) is inserted in the vibration damper unit (190) on the outside in the radial direction of the rubber vibration damper (191), the part further comprising an annular vibration damper ring (193) which has an outside diameter which is larger than the outside diameter of the Pulley (110). Pulley damper (100) Claim 1 , characterized in that the sound insulation element (160) comprises a sound insulation support (161), the sound insulation body (163) being connected to the sound insulation support (161) using the sound insulation support (161) as an insert. Pulley damper (100) Claim 3 characterized in that the soundproofing beam (161) comprises a beam insert portion inserted into the inner diameter surface of the cylindrical portion of the pulley (110) and a beam extension extended radially inward from the inner end of the beam insert portion; wherein the first soundproofing projection (1631) is extended in the axial direction from the soundproofing body (163) connected to the carrier extension to the vibration damper unit (190). Pulley damper (100) Claim 4 , characterized in that a plurality of sound insulation protrusions (1631 a) are formed on the inner side in the radial direction of the first sound insulation protrusion (1631). Pulley damper (100) Claim 1 , characterized in that the cover (150) is provided with a cover flange which is inserted on the outside in the radial direction into the cylindrical portion of the pulley (110); an annular insert member (160-1) made of a rubber material is further provided between the cover flange and the cylindrical portion of the pulley (110); wherein the insert member (160-1) is provided so that pressure is exerted on it through the cover flange and the cylindrical portion of the pulley (110) on the inside and on the outside in the radial direction.

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