CN105605151B - Single-mass flywheel with centrifugal pendulum - Google Patents

Abstract

The invention relates to a single-mass flywheel (100) comprising a disk (101) and a fastening opening (106) arranged on a reference circle (105) for fastening to a crankshaft of an internal combustion engine in the radial direction, comprising a friction surface (114) arranged on one side of the disk (101) and a fastening device (119) for forming a friction clutch. In order to be able to design a simple mass flywheel (100) which has a low mass and is therefore environmentally friendly, has a low installation space requirement and is also used for vibration damping, a centrifugal force pendulum (102) is arranged on the side opposite the friction surface (114), wherein the installation space of the centrifugal force pendulum (102) which is axially expanded relative to the disk (101) axially intersects the plane (E1) of the axial contact surface (108) of the fastening opening (106) in the axial direction.

Description

Single-mass flywheel with centrifugal pendulum

Technical Field

The invention relates to a single-mass flywheel having a disk element and a fastening opening arranged on a reference circle (Teilkreis) for fastening to a crankshaft of an internal combustion engine, having a friction surface arranged on one side of the disk element and having a fastening device for forming a friction clutch.

Background

The flywheel or, in the sense of the present disclosure, a single-mass flywheel differs from a dual-mass flywheel which directly receives the clutch pressure plate, as is known, for example, from DE 102011104240 a1, for forming a friction clutch and is connected to the crankshaft of an internal combustion engine. In this case, the flywheel mass of the single-mass flywheel is used for vibration isolation of the rotational vibrations of the internal combustion engine in addition to the torsional vibration damper, which is optionally integrated in the clutch disk. In order to achieve a corresponding degree of isolation, a corresponding mass is necessary, which is disadvantageous with respect to the required environmentally friendly internal combustion engine. In particular in compact and medium-sized vehicles, only a small installation space is still available. The use of the known dual mass flywheel is very costly.

Disclosure of Invention

The aim of the invention is to further advantageously design a single mass flywheel with reduced mass with sufficient vibration isolation and small installation space.

This object is achieved by the subject matter of claim 1. The claims dependent thereon describe advantageous embodiments of the subject matter of claim 1.

The proposed single-mass flywheel is preferably received on the crankshaft of the internal combustion engine, for example by means of bolts, and comprises a disk serving as a flywheel mass. For fastening to the crankshaft, fastening openings are provided in the radial inner region on a graduated circle. On the side facing away from the internal combustion engine, friction surfaces and fastening means, such as threaded openings, centering pins or the like, are provided for receiving the clutch pressure plate and for forming the friction clutch.

In order to reduce the mass of a single-mass flywheel while at least maintaining vibration isolation, thereby reducing the energy consumption of the vehicle and its CO₂A centrifugal force pendulum is arranged on the side opposite to the friction surface, wherein an installation space of the centrifugal force pendulum, which is expanded in the axial direction relative to the disk, axially intersects the axial contact surface of the fastening opening. By introducing the centrifugal force pendulum into the installation space between the housing of the internal combustion engine and the friction surface, a centrifugal force pendulum which is relatively wide in the axial direction can be provided by the partial overlap of the crankshaft flanges. Furthermore, a rotation-speed-adapted damping is achieved by the centrifugal force pendulum, which enables the total mass of the single-mass vibrating flywheel to be reduced with an improved isolation effect.

The disks of the proposed single-mass flywheel can be produced from a cast part, for example from gray cast iron, wherein the functional elements, for example the fastening openings, the fastening means and/or the friction surfaces, can be reworked, for example by cutting. Furthermore, the disc can be manufactured as a sheet shaped part. In this case, the functional element can be at least partially die-cut (werkzeugfallend) in design.

Depending on the requirements for the construction of the single-mass flywheel and the centrifugal force pendulum, the centrifugal force pendulum can be formed by a pendulum flange, which is connected to the disk radially inside the pendulum mass and receives the pendulum mass in a manner that swings in the centrifugal force field, and by pendulum masses which are arranged distributed over the circumference. The pendulum masses can be arranged on both sides of a pendulum flange of disk-shaped design. In this case, the axially opposite pendulum masses are each connected by means of a connecting element which passes through a corresponding slot of the pendulum flange, so that a pendulum movement of the pendulum masses relative to the pendulum flange is achieved. The suspension of the pendulum mass pairs is achieved in each case by means of two pendulum supports spaced apart in the circumferential direction, in which rolling bodies, such as rollers, roll on arcuate guide rails in each case, which are arranged in the notches of the pendulum masses and of the pendulum flange.

In a further embodiment, the pendulum flange can be formed by two side parts which receive the pendulum masses between the pendulum flanges in the axial direction and are connected to the disk part radially inside the pendulum masses. The pendulum support is formed by rolling elements and guide rails arranged in notches of the side parts and of the pendulum masses.

For example, in order to form a rupture protection and/or to additionally receive additional functional components, an axial projection connected to the disk and/or the pendulum flange can be provided radially outside the pendulum mass. The axial projection can be connected to the disk element in one piece or in the form of a ring segment. A sensor ring can be arranged on the axial projection for detecting rotational parameters such as the number of revolutions, the rotational angle and their time derivatives by means of sensors. The sensor ring can be arranged directly in the axial projection, for example in the form of a molding, a through-hole (durchtillungen) or the like, or can be applied as an additional ring, for example of L-shaped cross section, on the axial projection, for example riveted thereto.

Furthermore, a flywheel ring gear is received on the axial projection or on the pendulum flange. In the simplest case, the flywheel ring gear can be stamped into the axial projection, for example rolled and subsequently hardened.

The pendulum mass may be received inside the housing, for example, for noise isolation, for protection against pollutants, or the like. The housing can be configured at least on one side, for example, by a corresponding configuration of the side part of the pendulum flange, by an additional diaphragm or the like, wherein the pendulum mass is preferably received in a formed curvature of the disk part, so that the housing is only required on the side facing the engine housing in the direction of the centrifugal force pendulum away from it. The pendulum masses can be arranged at substantially the same radial level as the friction surfaces of the disks.

The disc may be limited with respect to its inner circumference to a diameter larger than the diameter of the crankshaft flange. In this case, the fastening openings for receiving the single-mass flywheel can be arranged on the respective radially inwardly extending pendulum flange. It is to be understood that the fastening opening can be provided on the one-piece pendulum flange, if suitably configured, or on both side parts of the two-part pendulum flange and, if appropriate, additionally on the disk part.

Drawings

The invention is explained in detail with the aid of the exemplary embodiments shown in fig. 1 to 11. The figures show:

FIG. 1 is a sectional view of the upper part of a single-mass flywheel with a centrifugal pendulum arranged around an axis of rotation,

figure 2 is the same illustration of a single mass flywheel with engaged axial protrusions as compared to the single mass flywheel of figure 1,

figure 3 is the same illustration of a single mass flywheel with a sensing ring arranged on an axial stub as compared to the single mass flywheel of figure 1,

figure 4 is a similar illustration of a single mass flywheel with a flywheel ring gear arranged on an axial stub as compared to the single mass flywheel of figures 1 to 3,

figure 5 is the same illustration of a single mass flywheel with a flywheel ring gear arranged on the axial stub and a sensor ring embossed into the axial stub as compared to the single mass flywheel of figures 1 to 4,

figure 6 is a similar illustration of a single mass flywheel with a flywheel ring gear arranged on an axial stub and an engaged sense ring as compared to the single mass flywheel of figures 1 to 5,

figure 7 is the same illustration of a single mass flywheel with a one-piece pendulum flange as compared to the single mass flywheel of figures 1 to 6,

figure 8 is a similar illustration of a single mass flywheel with a disc made of a casting which varies with respect to the single mass flywheel of figures 1 to 7,

figure 9 is a similar illustration of a single mass flywheel with a housing formed radially outwardly by the side part of the pendulum flange as compared to the single mass flywheel of figures 1 to 8,

FIG. 10 is a schematic representation of a single mass flywheel with a pendulum flange connected to the crankshaft, as opposed to the single mass flywheel of FIGS. 1 to 9, an

Fig. 11 is a schematic representation of a simple mass flywheel with a flywheel ring gear arranged on the pendulum flange, in a variant of the simple mass flywheel of fig. 1 to 10.

Detailed Description

Fig. 1 to 11 each show a sectional view of an upper part of a single mass flywheel 100,200,300,400,500,600,700,800,900,1000,1100 that can rotate about an axis of rotation d. Their differences are derived from the various views, wherein the disclosure of fig. 1 to 11 includes the combination and substitution of features of the individual single mass flywheels 100,200,300,400,500,600,700,800,900,1000,1100 with one another.

Fig. 1 shows a single mass flywheel 100 with a disk 101 and a centrifugal force pendulum 102. Radially on the inside, the disk 101 comprises a fastening flange 103 with a reinforcing ring 104, which is connected to a crankshaft flange of a crankshaft of an internal combustion engine, not shown, by means of fastening openings 106 arranged on a reference circle 105 and bolts 107. In this case, the contact surface 108 formed on the plane E1 contacts the end face of the clutch flange. The centrifugal force pendulum 102 intersects the plane E1 radially on the outside and uses the available installation space up to the plane E2.

Radially on the outside, the disk 101 has an axial projection 109 which extends in the axial direction in the direction of the centrifugal force pendulum 102 or in the direction of the internal combustion engine and which can serve as a rupture protection and as part of a housing 110 of the centrifugal force pendulum 102. The axial projection 109 is formed in one piece, for example molded, from a disk. The housing 110 is closed off with respect to the internal combustion engine by means of a diaphragm 111.

Radially between the fastening flange 103 and the axial projection 109, a disk 101 with a bell crank 112 is provided, forming an annular bend 113, in which the centrifugal force pendulum 102 is received. Radially outside of the crank 112, an annular friction surface 114 is provided, for example, by die-cutting the disc 101 from a sheet metal. The friction surfaces 114 form corresponding friction surfaces with respect to the friction surfaces of the friction lining surfaces 116 of the clutch disc 115. A subordinate clutch pressure plate 117, which is only indicated by way of illustration, is fixed and centered on the disk 101 by means of a fixing device 119, which is only partially formed, for example, by a threaded opening 118 and a centering pin.

The centrifugal force pendulum 102 is formed by a pendulum flange 120 and a pendulum mass 121 distributed over the circumference. The pendulum flange 120 is formed by two side parts 122, 123, which receive a pendulum mass 121 in an axially oscillating manner between them. For this purpose, the side parts 122, 123 have notches 124, 125 with guide rails 126, 127 on which rolling bodies 128, such as rollers, roll. The rolling bodies pass through the slots 129 and roll on the rails 130 of the pendulum masses 121, which are complementary to the rails 126, 127. The pendulum support structure formed in this way forms a pendulum suspension of the pendulum mass 121 in the centrifugal force range of the rotating single-mass flywheel 100. Each pendulum mass 121 is provided with two pendulum supports spaced apart in the circumferential direction.

The side parts 122, 123 are riveted together with the diaphragm 111 to the disk 101 by means of rivets 131 radially inside the pendulum mass 121. In the region of this rivet 131, the disk 101 has notches 132 distributed over the circumference, into which notches 132 the side parts 122, 123 fit.

In a variation of the single mass flywheel 100 of fig. 1, the single mass flywheel 200 of fig. 2 comprises, instead of the one-piece formed boss 109, an axial boss 209 joined by rivets 233 circumferentially alternating with threaded openings 118 (fig. 1). The projection 209 is designed as a sensor ring 234 with a sensor mark 235 running through it on the circumference. The axial projection 209 is L-shaped in cross section, whose radial arm 236 is connected to the disk 201 inside the housing 210, and whose axial arm 237 comes into contact with the diaphragm 211 for forming the housing 210 of the centrifugal force pendulum 202.

In a variation of the single mass flywheel 100,200 of fig. 1 and 2, the annular, cross-sectional L-shaped sensor ring 334 of the single mass flywheel 300 of fig. 3 is received on the axial boss 309. The sensor flag 335 is introduced into the axial arm 337. The radial arms 336 are riveted to the disk 301, here by means of riveting projections 333 which are seated from the disk 301.

In a variation of the single mass flywheel 100,200,300 of fig. 1 to 3, the single mass flywheel 400 of fig. 4 has a flywheel ring gear 438 arranged on the axial stub 409. The sensor markings can be embossed into the axial projection 409 or applied in the form of ring segments in the axial direction between the disk 401 and the flywheel ring gear 438. Alternatively-as shown-the sensor markings 435 may be provided on the outer circumference of the dish 401.

In a variant of the single mass flywheel 400 of fig. 4, the axial tabs 509 of the single mass flywheel 500 of fig. 5 are set back radially inward on their end sides, where the flywheel ring gear 538 is received. Sensor markings 535 are imprinted in the outer circumference of the axial protrusion 509 of the disc 501.

In a variation of the single mass flywheel 400,500 of fig. 4 and 5, the single mass flywheel 600 of fig. 6 is provided with a separate sense ring 634 axially spaced relative to the flywheel ring 638. The sensor ring 634 with the sensor mark 635 is L-shaped in cross section and is arranged on the axial projection 609 of the disk 601. The arrangement of the axial boss 609 and flywheel ring 638 corresponds to the remaining arrangement of the single mass flywheel 500 of fig. 5. Radial arm 636 is clampingly disposed between disc 601 and clutch pressure plate 617.

In a variant of the single-mass flywheel compared to the above-mentioned figures, the single-mass flywheel 700 of fig. 7 has a modified centrifugal force pendulum 702 with a separate pendulum flange 720, on both sides of which pendulum flanges pendulum masses 721 distributed over the circumference are arranged. Axially opposite pendulum masses 721 are connected to one another by means of a connecting element 740 provided with a stop buffer to form a pendulum mass pair. The connecting member 740 passes through a notch 741 expanded corresponding to the swing motion. The pendulum mass pair is pivoted relative to the pendulum flange 720 by means of a non-visible pivot bearing formed by rolling bodies, such as rollers, which roll on the guide rails of the pendulum mass 721 and the pendulum flange 720. The rollers pass through guide-lined slots provided in the pendulum mass 721 and the pendulum flange.

In the illustrated embodiment, the flywheel ring gear 738 is received on a molded axial boss 742. The outer casing 710 of the centrifugal force pendulum 702 is formed between the axial projection 742, the diaphragm 711 and the sensor ring 734. The sensor ring 734 is connected to the disc 701 by means of a radial arm 736. The sensor mark 735 is introduced into the sheet material layer 743 which is folded back around relative to the axial arm 737.

The one-piece pendulum flange 720 is connected to the disk 701 by means of rivets 731, corresponding to the two-piece pendulum flange 120 from fig. 1.

In the variant of the plate 101, 201, 301, 401, 501, 601, 701 of the single mass flywheel 100,200,300,400,500,600,700 from the above figures, which is produced by sheet metal forming, the plate 801 of the single mass flywheel 800 of fig. 8 is made from a casting. The cast blank is machined in a cutting process in this case, in particular for producing the friction surface 814, the receptacle of the flywheel ring 838, the introduction of the sensor mark 835, for producing the fastening 819 and the fastening opening 806 with the contact surface 808 and the slot 832.

In a variation of the single mass flywheel 200 of fig. 2, the single mass flywheel 900 of fig. 9 has a modified peripheral configuration. To construct the housing 910, the two side pieces 922, 923 are provided with shaped tabs 944, 955 pointing axially towards one another, which form a closed housing 910 for the pendulum mass 921. In addition, a flywheel ring gear 938 is received on an axial boss 944 of the side member 922. The two side pieces 922, 923 can be connected to one another, for example welded, on the end sides of the axial noses 944, 955. A sensor ring 934, corresponding to sensor ring 234 of fig. 2, received on disc 901 is connected to disc 901 by way of a staking boss 933 located from disc 901.

In contrast to the single mass flywheel of the above-mentioned figures, the single mass flywheels 1000,1100 of fig. 10 and 11 are configured with a modified connection to the crankshaft. Here, the disks 1001, 1101 are provided with an enlarged inner diameter, and the pendulum flanges 1020, 1120 of the centrifugal pendulums 1002, 1102 are provided with a reduced inner diameter. The fastening flanges 1003, 1103 with fastening openings 1006, 1106 and abutment surfaces 1008, 1108 are arranged on the pendulum flanges 1020, 1120.

The simple mass flywheel 1000 of fig. 10 has a pendulum flange 1020 formed in two parts from side parts 1022, 1023, wherein the two side parts 1022, 1023 are fastened to the crankshaft and receive a pendulum mass 1021 between them by means of a housing 1010. The housing 1010 is closed radially on the outside by axial regions 1044, 1045 which are clamped to one another in the axial direction. The plate 1001 is riveted radially inside the pendulum mass 1021 to the side pieces 1022, 1023 by means of rivets 1031. An axial spacing is set between the rivet and the friction face 1014 by the bell crank 1012. In particular, for reasons of installation space, the embedded rivet heads of the peripherally arranged rivets 1031 are located within the friction surfaces 1014. A bell crank 1046 having a notch 1047 spaces the friction surface 1014 relative to the anchor 1019 and the radially outer one-piece formed axial lug 1009. The axial projection 1009 is in abutting contact on the end side with a freewheel toothing 1038, which is received on the outer circumference of the side parts 1022, 1023. The axial projection 1009 here serves as an axial stop for the flywheel ring gearwheel 1038. A sensor ring 1034 with sensor indicia 1035 is received on the axial boss 1009.

The single-mass flywheel 1100 of fig. 11 has a centrifugal force pendulum 1102 with a one-piece pendulum flange, which is connected to a disk 1101 by means of rivets 1131. Here, the pendulum flange and the disk 1101 have bell cranks 1112, 1148, in order to position the friction surface 1114 and the centrifugal force pendulum 1102 axially relative to each other. Further, the configuration of the single mass flywheel 1100 corresponds to the configuration of the single mass flywheel 700 of fig. 7.

List of reference numerals

100 single mass flywheel

101 disc

102 centrifugal force pendulum

103 fixed flange

104 reinforcing ring

105 reference circle

106 fixed opening

107 bolt

108 contact surface

109 protruding head

110 outer cover

111 diaphragm

112 crank

113 bending part

114 friction surface

115 clutch disc

116 friction lining

117 Clutch pressure plate

118 threaded opening

119 fixing device

120 pendulum flange

121 pendulum mass

122 side part

123 side part

124 slot

125 notch

126 guide rail

127 guide rail

128 rolling body

129 notch

130 guide rail

131 rivet

132 notch

200 single mass flywheel

201 disc

202 centrifugal force pendulum

209 projecting head

210 outer cover

211 diaphragm

233 rivet

234 sense loop

235 sensor tag

236 arm

237 arm

300 single mass flywheel

301 disc

309 protruding head

333 riveting convex part

334 sensing ring

335 sensor tag

336 arm

337 arm

400 single mass flywheel

401 disc

409 protruding head

435 sensor tag

438 flywheel ring gear

500 single mass flywheel

501 disc

509 protruding head

535 sensor mark

538 flywheel gear ring

600 single mass flywheel

601 disc

609 protruding head

617 clutch pressure plate

634 sense ring

635 sensor tag

636 arm

638 flywheel gear ring

700 single mass flywheel

701 disc part

702 centrifugal force pendulum

710 outer cover

711 diaphragm

720 pendulum flange

721 pendulum mass

731 rivet

734 sense Ring

735 sensor flag

736 arm

737 arm

738 flywheel gear ring

739 stop buffer

740 connecting piece

741 slot

742 protruding head

743 sheet layer

800 single mass flywheel

801 disc

806 fixed opening

808 contact surface

814 friction surface

819 fixing device

832 notch

835 sensor marking

838 flywheel gear ring

900 single mass flywheel

901 disc

910 cover

921 pendulum mass

922 side member

923 side member

933 riveting convex part

934 sensor ring

938 flywheel ring gear

944 protruding head

945 protruding head

1000 single mass flywheel

1001 disc

1002 centrifugal force pendulum

1003 fixing flange

1006 fixed opening

1008 contact surface

1009 protruding head

1010 outer cover

1012 crank

1014 friction surface

1019 fixing device

1020 pendulum flange

1021 pendulum mass

1022 side part

1023 side part

1031 rivet

1034 sensing ring

1035 sensor Mark

1038 flywheel gear ring

Area 1044

Region 1045

1046 crank

1047 notch

1100 single mass flywheel

1101 disc

1102 centrifugal force pendulum

1103 fixed flange

1106 fixed opening

1108 abutting surface

1112 crank throw

1114 friction surface

1120 swing flange

1131 rivet

1148 crank

Axis of rotation D

E1 plane

E2 plane

Claims (10)

1. A single-mass flywheel having a disk element and a fastening opening arranged on a reference circle for fastening to a crankshaft of an internal combustion engine radially on the inside, having a friction surface arranged on one side of the disk element and having fastening means for forming a friction clutch, characterized in that a centrifugal force pendulum is arranged on the side opposite the friction surface, wherein the mounting space of the centrifugal force pendulum, which is expanded axially with respect to the disk element, intersects the plane (E1) of the axial contact surface of the fastening opening in the axial direction.

2. The single mass flywheel of claim 1, wherein the disc is made from a sheet shaped piece.

3. The single mass flywheel of claim 1, wherein the disc is fabricated from a casting.

4. Single mass flywheel according to one of claims 1 to 3, wherein the centrifugal force pendulum is formed by a pendulum flange and pendulum masses arranged distributed over the circumference, which pendulum flange is connected to the disk part radially inside the pendulum masses and receives the pendulum masses in a manner such that they oscillate within the centrifugal force field, wherein the pendulum masses are arranged on both sides of a pendulum flange of disk-shaped construction or the pendulum flange is formed by two side parts which receive the pendulum masses axially between them and are connected to the disk part radially inside the pendulum masses.

5. Single mass flywheel according to claim 4, characterised in that radially outside said oscillating mass there are axial tabs connected to said disc.

6. Single mass flywheel according to claim 5, characterised in that said axial tabs are integrally connected to said disc or are connected to said disc in the form of ring segments.

7. A single mass flywheel as claimed in claim 5 in which the sensing ring is formed by or received on the axial boss.

8. Single mass flywheel according to claim 5, characterised in that a flywheel toothing is received on said axial projection or on said pendulum flange.

9. The single mass flywheel of claim 4, wherein the pendulum mass is received inside of a housing.

10. Single mass flywheel according to one of claims 1 to 3, wherein said fixing openings are arranged on a pendulum flange.

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