DE102022123280A1 - dual mass flywheel - Google Patents

Abstract

A dual mass flywheel is provided, comprising: a spring (200); a primary mass (100) comprising a first housing (110) and a second housing (120), the first housing (110) being used for connection to a power source; a hub part (300) and a flange (400) which are integrally formed or connected to one another, the spring (200) being arranged between the primary mass (100) and the flange (400) in order to dampen torsional vibrations, and the hub part (300) serves as an output; and a diaphragm spring (500) provided in a compressed state in an axial direction (AX) between the flange (400) and the second housing (120). A radially inner end (122) of the second housing (120) is closer to a radial inner side of the twin-mass flywheel than a radially inner end of the diaphragm spring (500), or the radially inner end (122) of the second housing (120) is in a radial Direction (RA) flush with the radially inner end of the diaphragm spring (500).

Description

The present application relates to a twin-mass flywheel and, more particularly, to a twin-mass flywheel with improved water resistance.

The utility model CN210371835U of the applicant discloses a dual mass flywheel with a centrifugal pendulum unit. As in 1A As shown, the dual mass flywheel comprises: a primary mass 1 used for drivingly coupling to an output shaft of an engine; a secondary mass 3 and a hub core 4 used for drivingly coupling to an input shaft of a transmission; a flange 5 fixedly attached to the secondary mass 3; at least two arcuate springs 6 placed in a spring-receiving space defined by the primary mass 1 and capable of exerting pressure on the flange 5; and two or three centrifugal pendulum units 7 mounted on the flange 5 spaced in the circumferential direction of the dual mass flywheel.

The primary mass 1 comprises a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 being connected to one another at a radially outer section of the dual-mass flywheel and forming a spring receiving space for receiving the at least two arc springs 6.

The twin-mass flywheel further includes a diaphragm spring 8 , an inner circumference of the diaphragm spring 8 being fixedly fitted between the secondary mass 3 and the flange 5 , and an outer circumference of the diaphragm spring 8 being pressed against the second housing 12 . A friction lining made of plastic can be provided between the outer circumference of the diaphragm spring 8 and the second housing 12 . The diaphragm spring 8 (and the friction lining) can not only limit the secondary mass 3 axially on one axial side (the right side in 1A) realize, but also realize the damping function (vibration damping) by friction.

The object of the present application is to provide a dual mass flywheel with improved water resistance.

• eine Feder; eine Primärmasse, die ein erstes Gehäuse und ein zweites Gehäuse umfasst, wobei das erste Gehäuse und das zweite Gehäuse einen Federaufnahmeraum zum Aufnehmen der Feder definieren;
• eine Sekundärmasse, wobei die Feder zwischen der Primärmasse und der Sekundärmasse angeordnet ist, um Torsionsschwingungen zu dämpfen; und
• eine Membranfeder, die in einem komprimierten Zustand in einer axialen Richtung des Zweimassenschwungrads zwischen der Sekundärmasse und dem zweiten Gehäuse vorgesehen ist,
• wobei ein radial inneres Ende des zweiten Gehäuses näher an einer radial inneren Seite des Zweimassenschwungrads als ein radial inneres Ende der Membranfeder liegt oder das radial innere Ende des zweiten Gehäuses in einer radialen Richtung des Zweimassenschwungrads bündig mit dem radial inneren Ende der Membranfeder ist.

There is provided a dual mass flywheel comprising:

• a feather; a primary mass including a first housing and a second housing, the first housing and the second housing defining a spring receiving space for receiving the spring;
• a secondary mass, the spring being positioned between the primary mass and the secondary mass to dampen torsional vibrations; and
• a diaphragm spring provided in a compressed state in an axial direction of the twin-mass flywheel between the secondary mass and the second housing,
• wherein a radially inner end of the second housing is closer to a radially inner side of the dual-mass flywheel than a radially inner end of the diaphragm spring, or the radially inner end of the second housing is flush with the radially inner end of the diaphragm spring in a radial direction of the dual-mass flywheel.

In at least one embodiment, the flange includes a base circle portion and a flange wing portion protruding from the base circle portion toward radially outside, the second housing and the base circle portion of the flange overlapping in a radial direction of the dual-mass flywheel.

In at least one embodiment, a radial length of the second housing is greater than 1/3 of a radius of the dual-mass flywheel, preferably the radial length of the second housing is greater than 2/5 of the radius of the dual-mass flywheel and less than 1/2 of the radius of the dual-mass flywheel.

In at least one embodiment, a radial length of the diaphragm spring is less than 1/5 of a radius of the dual-mass flywheel, preferably the radial length of the diaphragm spring is less than 1/9 of the radius of the dual-mass flywheel.

In at least one embodiment, the radial length of the diaphragm spring is less than 2/5 of the radial length of the second housing, preferably the radial length of the diaphragm spring is less than 1/4 of the radial length of the second housing.

In at least one embodiment, the dual-mass flywheel further comprises a first friction ring, which is arranged in the axial direction at least partially between the secondary mass and the diaphragm spring, in particular at least partially between the flange as at least a part of the secondary mass and the diaphragm spring, with the diaphragm spring between the first Friction ring and the second housing is arranged; or
in the axial direction, the first friction ring is at least partially arranged between the second housing and the diaphragm spring, the diaphragm spring is provided between the first friction ring and the secondary mass.

• einen axialen Abschnitt, der sich entlang der axialen Richtung erstreckt; und
• einen radialen Abschnitt, der mit dem axialen Abschnitt verbunden ist und sich entlang der radialen Richtung des Zweimassenschwungrads erstreckt;
• wobei der axiale Abschnitt eine erste Struktur aufweist, wobei an dem radial inneren Ende des zweiten Gehäuses oder dem Flansch eine zweite Struktur vorgesehen ist, die der ersten Struktur entspricht, wobei die erste Struktur mit der zweiten Struktur gekoppelt ist, so dass der erste Reibring drehfest mit dem zweiten Gehäuse oder dem Flansch verbunden ist.

Furthermore, the first friction ring includes:

• an axial portion extending along the axial direction; and
• a radial portion connected to the axial portion and extending along the radial direction of the twin-mass flywheel;
• the axial section having a first structure, a second structure corresponding to the first structure being provided at the radially inner end of the second housing or the flange, the first structure being coupled to the second structure such that the first friction ring is non-rotatable connected to the second housing or the flange.

Furthermore, under the action of the diaphragm spring, the radial portion bears axially against the secondary mass or the second housing; the axial section bears radially against the second housing or the secondary mass.

Further, on the outer periphery of the axial portion, one or more projections projecting toward the radially outside are provided, and at the radially inner end of the second housing, one or more recesses corresponding to the projections are provided, the projections corresponding to the recesses are coupled; or
on the outer periphery of the axial portion, one or more recesses depressed toward the radially inner side are provided, and at the radially inner end of the second housing, one or more projections corresponding to the recesses are provided, the projections corresponding to the recesses are coupled.

Furthermore, an assembly aid structure is also provided on the first friction ring.

Furthermore, the diaphragm spring is made of metal and the first friction ring is made of plastic.

The dual-mass flywheel also includes a support element and a second friction ring, with the support element and the second friction ring being arranged between the first housing and the secondary mass, in particular between the first housing and a hub part as part of the secondary mass, in order to close an axial gap between the first to define the housing and the secondary mass or the hub part,
the second friction ring has a stepped cross section and includes an axial portion, a first radial portion extending from the axial portion toward the radially outside, and a second radial portion extending from the axial portion toward the radial inside, wherein the second radial section is pressed against the secondary mass or the hub part by the support element.

• 1A ist eine Querschnittsansicht eines Zweimassenschwungrads nach dem Stand der Technik.
• 1B ist eine schematische Ansicht nach dem Verlängern des zweiten Gehäuses 12 des Zweimassenschwungrads nach dem Stand der Technik.
• 2 ist eine Vorderansicht eines Zweimassenschwungrads gemäß einer Ausführungsform der vorliegenden Anmeldung.
• 3 ist eine perspektivische Schrägansicht des in 2 gezeigten Zweimassenschwungrads.
• 4A ist eine Querschnittsansicht des Zweimassenschwungrads entlang der Linie Y-Y in 2.
• 4B ist eine Querschnittsansicht des Zweimassenschwungrads entlang der Linie X-X in 2.
• 5A ist eine vergrößerte schematische Ansicht der oberen Hälfte in 4A, 5B ist eine vergrößerte schematische Ansicht der unteren Hälfte in 4A.
• 6A ist eine teilweise vergrößerte perspektivische Ansicht des in 2 gezeigten Zweimassenschwungrads, 6B ist eine teilweise vergrößerte schematische Querschnittsansicht des in 2 gezeigten Zweimassenschwungrads.

In this case, the radially inner end of the second housing is closer to a radially inner side of the dual-mass flywheel than the diaphragm spring. Therefore, when the dual-mass flywheel is installed between the engine and the transmission, for example, the respective parts of the transmission do not come into direct contact with the diaphragm spring, whereby the deformation of the diaphragm spring during the assembling process can be avoided or reduced.

• 1A Figure 12 is a cross-sectional view of a prior art dual mass flywheel.
• 1B 12 is a schematic view after lengthening of the second housing 12 of the prior art dual mass flywheel.
• 2 12 is a front view of a dual mass flywheel according to an embodiment of the present application.
• 3 is a perspective oblique view of FIG 2 dual-mass flywheel shown.
• 4A 13 is a cross-sectional view of the dual-mass flywheel along line YY in FIG 2 .
• 4B 13 is a cross-sectional view of the dual-mass flywheel along line XX in FIG 2 .
• 5A is an enlarged schematic view of the upper half in FIG 4A , 5B is an enlarged schematic view of the lower half in FIG 4A .
• 6A is a partially enlarged perspective view of FIG 2 shown dual-mass flywheel, 6B is a partially enlarged schematic cross-sectional view of FIG 2 dual-mass flywheel shown.

Reference List

1

primary mass

3

secondary mass

4

hub core

5

flange

6

arc spring

7

centrifugal pendulum unit

8th

membrane spring

11

first housing

12

second housing

12A

Extension of the second housing

100

primary mass

110

first housing

111

radial section of the first housing

112

axial section of the first housing

120

second housing

121

radially outer end of the second housing

122

radially inner end of the second housing

122G

groove

200

Feather

300

hub part

310

hub core

320

hub flange

330

Through holes for mounting screws

400

flange

410

rivet

500

membrane spring

600

first friction ring

610

radial section of the first friction ring

620

axial section of the first friction ring

700

support element

800

second friction ring

810

axial section of the second friction ring

820

first radial section of the second friction ring

830

second radial section of the second friction ring

O

central axis

AX

axial direction

RA

radial direction

C

circumferential direction

Exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that these specific descriptions are used only to teach those skilled in the art how to implement the present application and are not used to exhaust all possible forms of the present application or to limit the scope of the present application.

Unless otherwise specified, in this application, the axial direction, the radial direction and the circumferential direction refer to an axial direction AX, a radial direction RA and a circumferential direction C of the dual-mass flywheel, respectively, and the axial inside refers to one in the axial direction AX side close to a center of the dual-mass flywheel, and the axially outer side refers to a side distant from the center of the dual-mass flywheel in the axial direction AX; the radial inside refers to a side close to a center axis O of the dual-mass flywheel in the radial direction RA, and the radial outside refers to a side distant in the radial direction RA from the center axis O of the dual-mass flywheel.

As in 1A 1, a radial length of a second housing 12 (sometimes referred to as a cover plate) is small. When the dual-mass flywheel (sometimes abbreviated as a flywheel hereinafter) is assembled with an engine and a transmission, an input shaft of the transmission protrudes into a hub core 4, so components such as the input shaft of the transmission may cause the hub core 4 and a flange 5 are crooked, causing a diaphragm spring 8 to deform.

In order to prevent deformation of the diaphragm spring, the applicant, as in 1B shown a solution designed to do that in 1A to lengthen the second housing 12 shown, that is, to increase the radial length of the second housing 12 so that it extends further towards the radially inner side to form an extension 12A which is in 1 B is shown.

However, it is desirable that the twin-mass flywheel also has water resistance. But by simply lengthening the in 1A With the second housing 12 shown, a large gap S may be generated between the second housing 12 (including the extension 12A) and the diaphragm spring 8, and a certain amount of water is easy to store in the gap S. In this way, water from a slit that might be formed between the diaphragm spring 8 and the second housing 12 can easily enter the inside of the flywheel, resulting in a failure of the grease inside the flywheel.

The following embodiments of the twin-mass flywheel of the present application have been created in consideration of the above-mentioned circumstances.

As in 2 until 6B 1, an embodiment of the present application provides a dual mass flywheel that may include a primary mass 100, a spring 200, a secondary mass (which may include a hub portion 300 and a flange 400), and a diaphragm spring 500.

The primary mass 100 may include a first housing 110 and a second housing 120 , the first housing 110 and the second housing 120 defining a spring receiving space for receiving the spring 200 . Here, the first housing 110 can be used to connect to a power source such as a motor.

Here, for example, the first housing 110 may include a radial portion 111 extending substantially along the radial direction RA and an axial portion 112 extending from the radial portion 111 to the second housing 120 . A radially outer end 121 of the second housing 120 may be welded to the axial portion 112, for example.

Here, as an example, the first housing 110 may be connected to a crankshaft of the engine.

The spring 200 can be an arc spring or a linear spring. For example only, the spring 200 may be, for example, a metal spring, a rubber spring, an air spring, or a compound spring, such as a compound rubber-metal coil spring.

The hub part 300 and the flange 400 may be formed integrally with each other or provided separately from each other and connected to each other. The spring 200 is arranged between the primary mass 100 and the secondary mass to dampen torsional vibrations, and in particular the spring 200 can be arranged between the primary mass 100 and the flange 400 to dampen torsional vibrations. Here, the boss part 300 can serve as an output for outputting torque from the first housing 110 . Alternatively, the hub part 300 can also serve as the input and the first housing 110 as the output.

Here, as an example, the hub part 300 may include a hub core 310 and a hub flange 320 , where the hub flange 320 and the flange 400 may be fixedly connected to each other by a variety of fasteners such as rivets 410 .

The diaphragm spring 500 is disposed between the secondary mass (more specifically, the flange 400) and the second housing 120 in a compressed state in the axial direction AX of the dual-mass flywheel.

Here, a radially inner end 122 of the second housing 120 (or an inner peripheral surface of the second housing 120) may be closer to the radially inner side of the dual-mass flywheel than a radially inner end of the diaphragm spring 500; of course, the radially inner end 122 of the second housing 120 may also be flush with the radially inner end of the diaphragm spring 500 in the radial direction RA. For example, when the dual-mass flywheel is installed between the engine and the transmission, the corresponding components of the transmission will not directly contact the diaphragm spring 500, which can avoid or reduce the deformation of the diaphragm spring 500 during assembly.

The diaphragm spring 500 is integrally arranged on the radially inner end 122 of the second housing 120, and both the radially outer end of the diaphragm spring 500 and the radially inner end 122 of the second housing 120 are arranged on the radially inner side of the dual-mass flywheel, which means that the gap or space between the diaphragm spring 500 and the second housing 120 is small and water is not easily accumulated, so that the water resistance of the dual-mass flywheel can be improved. Here, the flange 400 may include a base circle portion and a flange wing portion protruding from the base circle portion toward the radially outside, and the flange 400 may be rotated by pressing the flange wing portion by the spring 200 . Optionally, the second housing 120 and the base circle portion of the flange 400 overlap in the dual-mass flywheel radial direction RA. That is, the second housing 120 and the base circle portion have portions located at the same radial height, or in other words, viewed along the axial direction AX, there is an overlap or an overlap between the second housing 120 and the base circle portion gives.

With reference to 4B optionally, a radial length W1 of the second housing 120 is greater than 1/3 of a radius R of the dual mass flywheel. Preferably, the radial length W1 of the second housing 120 is greater than 2/5 of the radius R of the dual mass flywheel.

Here, the radial length W<b>1 of the second housing 120 refers to a length located at half of an axial cross section of the second housing 120 .

Here, a longer or lengthened second housing 120 is proposed, whereby the radial length W1 of the second housing 120 is increased, which means that a water-resistant height of the dual-mass flywheel is increased. The dual mass flywheel is less prone to water ingress and water resistance is improved.

Here, preferably, the radial length W1 of the second housing 120 is less than 1/2 of the radius R of the dual mass flywheel. The radial length W1 of the second housing 120 is less than 1/2 of the radius R of the dual-mass flywheel, which can ensure that the second housing 120 is not lengthened unnecessarily, leaving enough space for radially inner structures such as the rivets 410, through holes 330 for mounting screws and the hub core 310 mentioned below.

With reference to 4B and 5B Optionally, a radial length W2 of the diaphragm spring 500 is less than 1/5 of the radius R of the twin-mass flywheel, more preferably less than 1/9 of the radius R of the twin-mass flywheel.

Optionally, the radial length W2 of the diaphragm spring 500 is less than 2/5 of the radial length W1 of the second housing 120, preferably the radial length W2 of the diaphragm spring 500 is less than 1/4 of the radial length W1 of the second housing 120.

With reference to 5A and 5B the dual-mass flywheel optionally also includes a first friction ring 600 (which can also be referred to as a friction ring for a diaphragm spring), with the first friction ring 600 being arranged at least partially between the secondary mass (in particular the flange 400) and the diaphragm spring 500 in the axial direction AX, and the diaphragm spring 500 is interposed between the first friction ring 600 and the second housing 120, wherein a length by which the diaphragm spring 500 protrudes from the first friction ring 600 may be less than 1/2 of the radial length W2 of the diaphragm spring 500. Optionally, first friction ring 600 can also be arranged at least partially between second housing and diaphragm spring 500 in axial direction AX, and diaphragm spring 500 can be arranged between first friction ring 600 and the secondary mass.

Here, the diaphragm spring 500 is defined with a smaller radial length from different points of view, which makes the gap between the diaphragm spring 500 and the second housing 120, which could form a water storage space, smaller, so that even when wading in the water, water does not easily enter the gap is held between the diaphragm spring 500 and the second housing 120, which can improve the water resistance of the dual-mass flywheel.

With reference to 6B For example, the first friction ring 600 may optionally include: an axial portion 620 that extends along the axial direction AX, and a radial portion 610 that extends from an axial end of the axial portion 620 along the radial direction RA of the dual mass flywheel.

Here, the inner circumference of the diaphragm spring 500 can abut against the radial portion 610 and the outer circumference of the diaphragm spring 500 can abut against the second housing 120 . Alternatively, the inner periphery of the diaphragm spring 500 may abut against the second housing 120 and the outer periphery of the diaphragm spring 500 abut against the radial portion 610 .

Preferably, the axial portion 620 of the first friction ring 600 abuts the radially inner end 122 of the second housing 120 in the radial direction RA such that there is substantially no gap at a circumferential contact surface of the axial portion 620 opposite the radially inner end 122, thereby preventing It is possible for water to enter the interior of the dual mass flywheel from a slot between the axial section 620 and the radially inner end 122 . The radial portion 610 of the first friction ring 600 abuts the flange 400 under an axial force of the diaphragm spring 500 so that there is substantially no gap at a circumferential contact surface of the radial portion 610 opposed to the flange 400, whereby water can be prevented from a slot between the radial portion 610 and the flange 400 enters the interior of the dual mass flywheel. With such an arrangement, the first friction ring 600 can be prevented from entering water from a slit (extending radially inward of the dual-mass flywheel) at a contact surface between the first friction ring 600 and the flange 400 into the interior of the dual-mass flywheel, or water from a slit (which extends axially to the inside of the dual-mass flywheel) at a contact surface between the first friction ring 600 and the second housing 120 penetrates into the interior of the dual-mass flywheel, thereby using the first friction ring 600 and the diaphragm spring 500 to close the gap between the flange 400 and the second housing 120 can be sealed well to prevent that water penetrates between the flange 400 and the second housing 120 into the interior of the dual mass flywheel.

Optionally, referring to 2 , 6A and 6B For example, the radially inner end 122 of the second housing 120 may be formed with a plurality (e.g., three) of grooves 122G, and the axial portion 620 may have a plurality of (e.g., three) protrusions 620P extending from the outer peripheral surface of the axial portion 620 in Protrude toward the radially outside, wherein the number and the circumferential positions of the projections 620P correspond to the number and the circumferential positions of the grooves 122G. Here, the protrusion 620P can serve as an example of a first structure, and the groove 122G can serve as an example of a second structure. The second structure can also be formed on the flange 400 . The first structure is coupled to the second structure such that the first friction ring 600 is non-rotatably connected to the second housing 120 or the flange. When the twin-mass flywheel is assembled, the projection 620P is received in the groove 122G, preventing the first friction ring 600 from rotating relative to the second housing 120, so that the diaphragm spring 500 does not rotate relative to the second housing 120 or the first Friction ring 600 can rotate so that water does not easily penetrate from the gap between the diaphragm spring 500 and the second housing 120 or the first friction ring 600 into the interior of the dual mass flywheel. The membrane spring 500 can be made of metal and the first friction ring 600 can be made of plastic. The first friction ring 600 made of plastic is in direct contact with the diaphragm spring 500 made of metal, while the flange 400 made of metal, for example, is in direct contact with the diaphragm spring 500 made of metal.

When assembling the first friction ring 600, as in 6A until 6B As shown, first the diaphragm spring 500 is assembled with the first friction ring 600, then each projection 620P is aligned with the corresponding groove 122G, and then each projection 620P is inserted into the groove 122G. During the insertion process, the axial section 620 of the first friction ring 600 is also correspondingly inserted into the inside of the second housing 120 . Additionally, assembly support (or tooling) structure may be provided at an end of axial portion 620 opposite radial portion 610 to hold first friction ring 600 during assembly and shipping.

Although the protrusions 620P are provided on the outer periphery of the axial portion 620 of the first friction ring 600 and the grooves 122G are provided on the radially inner end 122 of the second housing 120 in this embodiment, the grooves may be through holes. Alternatively, the grooves can be provided on the outer circumference of the axial section 620 and the projections on the radially inner end 122, the grooves being coupled to the projections, or the projections and the grooves can be provided on the outer circumference of the axial section 620 of the first friction ring 600, while the grooves and the projections are arranged correspondingly and so that they can be coupled to the radially inner end 122 of the second housing 120, the projections of the axial section 620 with the grooves of the radially inner end 122 and the grooves of the axial section 620 with the projections of the radially inner end 122 are coupled.

Although the first friction ring 600 is non-rotatably connected to the second housing 120 in this embodiment, the first friction ring 600 may alternatively be non-rotatably connected to the flange 400 . This time, for example, the first friction ring 600 can be inserted with its axial section 620 into a corresponding structure on the flange 400 . Preferably, this time the axial portion 620 is a circumferentially discontinuous structure, i. H. it has a plurality of fingers, while on the flange 400 there are correspondingly a plurality of recesses (in particular through holes), the fingers being inserted in the recesses, so that the first friction ring 600 is non-rotatably connected to the flange 400; and the radial portion 610 of the first friction ring 600 abuts the first housing 120 .

With reference to 5A and 5B the dual-mass flywheel may optionally further include a support member 700 and a second friction ring 800 (also referred to as support member friction ring), wherein the support member 700 and the second friction ring 800 are disposed between the first housing 110 and the hub portion 300 to eliminate an axial gap between the first housing 110 and the hub part 300 to define. The second friction ring 800 may have a stepped cross section (axial section) and includes an axial portion 810, a first radial portion 820 extending from the axial portion 810 toward the radially outside, and a second radial portion 830 extending from the axial section 810 extends in the direction of the radially inner side, the second radial section 830 being pressed against the hub part 300 by the support element 700 .

The support element 700 and the second friction ring 800 can prevent water from entering the gap between the hub part 300 and the first housing 110 into the interior of the dual mass flywheel, in particular into the position of the spring 200; in particular, water is prevented from leaking from the through holes 330 for mounting screws enters the space between the hub part 300 and the first housing 110, enters the interior of the dual mass flywheel.

Here, the support member 700 may have a structure bent toward the second friction ring 800 and in surface contact with the second radial portion 830 . Here, the outer peripheral surface of the axial portion 810 can be approximately in contact with the inner peripheral surface of the flange 400, and the inner peripheral surface of the axial portion 810 can be approximately in contact with the outer circumference of the support member 700, which facilitates radial positioning of the second friction ring 800. Alternatively, since the support member 700 and the second radial portion 830 and the boss member 300 are pressed against each other in the axial direction and there is no gap between contact points of the three, the outer peripheral surface of the axial portion 810 cannot be in contact with the inner peripheral surface of the flange 400, and the Inner peripheral surface of the axial portion 810 are not in contact with the outer periphery of the support member 700.

With the angled structure and the large contact area of the support member 700 and the second friction ring 800, the water resistance of the twin-mass flywheel is improved.

Referring to example 5A For example, a plurality of through holes 330 for mounting screws may be formed on the hub flange 320 of the hub part 300 . The bolts may pass through the mounting bolt through holes 330 to fasten the support member 700 and the first housing 110 together, for example, to a crankshaft of the engine.

The above second friction ring 800 is located on the radially outer side of the through holes 330 for mounting bolts.

As described above, the present application provides a dual mass flywheel that uses an elongated second housing 120 and a small diaphragm spring 500 . On the one hand, the water-resistant height of the dual-mass flywheel is increased by the lengthened second housing 120; on the other hand, the diaphragm spring 500 is not easily deformed, and the effective radius of the diaphragm spring 500 is reduced, so that a diaphragm spring capable of providing a larger axial force can be realized.

In this dual-mass flywheel, there is almost no water storage space near the diaphragm spring 500, so water does not easily enter the inside of the dual-mass flywheel from the diaphragm spring 500, which can prevent the failure of the grease inside the flywheel due to water ingress, improve the water resistance of the flywheel can be significantly improved and the performance and durability of the dual mass flywheel can be improved.

It should be understood that the above embodiments are exemplary only and are not intended to limit the present application. Those skilled in the art can, given the teachings of the present application, make various modifications and changes to the above embodiments without departing from the scope of the present application.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited 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

• CN 210371835 U [0002]

Claims (10)

A dual mass flywheel comprising: a spring (200); a primary mass (100) comprising a first housing (110) and a second housing (120), the first housing (110) and the second housing (120) defining a spring receiving space for receiving the spring (200); a secondary mass, wherein the spring (200) is arranged between the primary mass (100) and the secondary mass to dampen torsional vibrations; and a diaphragm spring (500) which (500) is provided in a compressed state in an axial direction (AX) of the dual mass flywheel between the secondary mass and the second housing (120), characterized in that a radially inner end (122) of the second Housing (120) is closer to a radially inner side of the dual-mass flywheel than a radially inner end of the diaphragm spring (500), or the radially inner end (122) of the second housing (120) in a radial direction (RA) of the dual-mass flywheel is flush with the radial inner end of the diaphragm spring (500). dual mass flywheel claim 1 , characterized in that a radial length (W1) of the second housing (120) is greater than 1/3 of a radius (R) of the dual mass flywheel, preferably the radial length (W1) of the second housing (120) is greater than 2/5 of the Radius (R) of the dual-mass flywheel and is less than 1/2 the radius (R) of the dual-mass flywheel. dual mass flywheel claim 1 , characterized in that a radial length (W2) of the diaphragm spring (500) is less than 1/5 of a radius (R) of the dual mass flywheel, preferably the radial length (W2) of the diaphragm spring (500) is less than 1/9 of the radius ( R) of the dual mass flywheel. Dual mass flywheel after one of Claims 1 until 3 , characterized in that the dual-mass flywheel further comprises a first friction ring (600), wherein in the axial direction (AX) the first friction ring (600) is at least partially between the secondary mass and the diaphragm spring (500), in particular at least partially between a flange (400 ) is arranged as at least a part of the secondary mass and the diaphragm spring (500), and the diaphragm spring (500) is arranged between the first friction ring (600) and the second housing (120); or in the axial direction (AX) the first friction ring (600) is at least partially arranged between the second housing and the diaphragm spring (500), and the diaphragm spring (500) is provided between the first friction ring (600) and the secondary mass. dual mass flywheel claim 4 , characterized in that the first friction ring (600) comprises: an axial portion (620) extending along the axial direction (AX); and a radial portion (610) connected to the axial portion and extending along the radial direction (RA) of the dual mass flywheel; the axial section having a first structure, a second structure corresponding to the first structure being provided at the radially inner end (122) of the second housing (120) or the flange (400), the first structure having the second structure is coupled so that the first friction ring (600) is non-rotatably connected to the second housing (120) or the flange. dual mass flywheel claim 5 , characterized in that the radial portion abuts axially against the secondary mass or the second housing under the action of the diaphragm spring; the axial section bears radially against the second housing or the secondary mass. Dual mass flywheel after one of Claims 4 until 6 , characterized in that on the outer circumference of the axial section one or more projections, which protrude in the direction of the radial outside, are provided, while at the radially inner end (122) of the second housing (120) one or more recesses, which correspond to the projections, are provided, the protrusions being respectively coupled to the recesses; or on the outer circumference of the axial section one or more recesses which are recessed towards the radially inner side are provided, while on the radially inner end (122) of the second housing (120) one or more projections which correspond to the recesses are provided, wherein the protrusions are respectively coupled to the recesses. Dual mass flywheel after one of Claims 4 until 7 , characterized in that an assembly support structure is also provided on the first friction ring. Dual mass flywheel after one of Claims 4 until 8th , characterized , that the diaphragm spring (500) is made of metal and the first friction ring (600) is made of plastic. Dual mass flywheel after one of Claims 1 until 9 , characterized in that the dual-mass flywheel further comprises a support element (700) and a second friction ring (800), the support element (700) and the second friction ring (800) between the first housing (110) and the secondary mass, in particular between the first housing (110) and a hub portion (300) as part of the secondary mass to define an axial gap between the first housing (110) and the secondary mass or hub portion (300), the second friction ring (800) having a stepped cross-section and having an axial portion (810), a first radial portion (820) extending from the axial portion (810) toward the radially outside, and a second radial portion (830) extending from the axial portion ( 810) extends in the direction of the radial inside, wherein the second radial section (830) is pressed by the support element (700) against the secondary mass or the hub part (300).

Images