CN115929845A - Curved spring stop with threading geometry - Google Patents
Curved spring stop with threading geometry Download PDFInfo
- Publication number
- CN115929845A CN115929845A CN202210922580.4A CN202210922580A CN115929845A CN 115929845 A CN115929845 A CN 115929845A CN 202210922580 A CN202210922580 A CN 202210922580A CN 115929845 A CN115929845 A CN 115929845A
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- China
- Prior art keywords
- mass
- primary mass
- spring
- arcuate spring
- primary
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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
- F16F15/131—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 the rotating system comprising two or more gyratory masses
- F16F15/133—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 the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
- F16F15/134—Wound springs
- F16F15/1343—Wound springs characterised by the spring mounting
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/08—Functional characteristics, e.g. variability, frequency-dependence pre-stressed
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A dual mass flywheel (1) having a primary mass (2) and a secondary mass (3) which can be rotated relative to one another against the action of at least one arcuate spring (4), wherein the arcuate spring (4) is arranged in an arcuate spring receptacle (8) of the primary mass (2) which is formed by a primary mass plate (6) and a primary mass cover (7), and wherein the arcuate spring (4) is supported at least one arcuate spring stop (16) at the primary mass plate (6) and/or at the primary mass cover (7), in which dual mass flywheel problem-free cover mounting is ensured even when the arcuate spring pretension is large, in that: the arcuate spring stop (16) has at least one lead-through geometry (18, 19).
Description
Technical Field
The invention relates to a dual-mass flywheel having a primary mass and a secondary mass which are rotatable relative to one another against the action of at least one arcuate spring, wherein the arcuate spring is arranged in an arcuate spring receptacle of the primary mass, which is formed by a primary mass plate and a primary mass cover, and wherein the arcuate spring is supported at least one arcuate spring stop at the primary mass plate and/or the primary mass cover, and to a primary mass cover for such a dual-mass flywheel.
Background
A dual mass flywheel (ZMS) is known from the prior art, for example from DE 41 17 582 A1. Such dual-mass flywheels are used as vibration dampers for torsional vibrations in the drive train of a motor vehicle, wherein the dual-mass flywheels are usually arranged between the crankshaft of an internal combustion engine driving the motor vehicle and a vehicle clutch mounted upstream of the manual transmission. Torsional oscillations caused by irregular drive torques of internal combustion engines, which are usually designed as piston engines, are damped by the primary and secondary masses being rotatable relative to one another against spring forces and possibly also against dry friction.
Problems arise in the case of a dual mass flywheel with preloaded bow springs during cover installation. When the arc spring is pre-tightened, the unclamped angle of the arc spring is larger than the window angle between the arc spring stops in the primary flywheel. When the bow spring is inserted into the primary flywheel, the spring rings tend to tilt toward one another via the stop. It can thus occur that the curved spring stop in the cover comes into contact with the turned-over spring ring, so that the cover is difficult to install. The greater the pre-load of the spring, the more strongly the problem behaves. The permissible pretension is therefore limited in the prior art in order to prevent installation problems.
Disclosure of Invention
The object of the present invention is to provide a dual mass flywheel, in which problem-free cover installation is ensured even with high pretensioning of the arcuate springs.
The problem is solved by a dual mass flywheel according to the invention and a primary mass cover according to the invention. Preferred embodiments, embodiments or improvements of the invention are given below.
The problem mentioned above is solved in particular by a dual mass flywheel having a primary mass and a secondary mass which can be rotated relative to one another against the action of at least one arcuate spring, wherein the arcuate spring is arranged in an arcuate spring receptacle of the primary mass, which is formed by a primary mass plate and a primary mass cover, and wherein the arcuate spring is supported at least one arcuate spring stop at the primary mass plate and/or at the primary mass cover, wherein the arcuate spring stop has at least one lead-through geometry.
In one embodiment of the invention, the arcuate spring is supported in a prestressed manner on at least one arcuate spring stop at the primary mass plate and/or at the primary mass cover.
In one embodiment of the invention, the dual mass flywheel has two arcuate springs which are supported at two arcuate spring stops at the primary mass plate and/or at the primary mass cover. The arcuate spring stops are preferably arranged opposite one another.
In one embodiment of the invention, the at least one lead-through geometry is arranged at an arcuate spring stop of the primary mass cover.
The at least one threading geometry comprises in one embodiment of the invention an inclined portion. The inclined portion extends over at least a portion of the stopper edge. The inclined portion is preferably arranged radially inside the spring turns of the bow spring in the mounted position.
In one embodiment of the invention, the at least one lead-through geometry comprises a concave indentation.
In one embodiment of the invention, the at least one arcuate spring stop has a lead-through geometry on both sides in the circumferential direction.
The object mentioned at the outset is also achieved by a primary mass cover for use in a dual mass flywheel, comprising at least one curved spring stop, wherein the at least one curved spring stop has at least one lead-through geometry.
Drawings
Embodiments of the invention are explained in detail below with reference to the attached drawing figures. Shown here are:
FIG. 1 is a cross-sectional view of a comparative example according to the prior art;
fig. 2 shows a spatial view of a primary mass cover according to the invention;
fig. 3 shows a first embodiment of a threading geometry according to the invention;
fig. 4 shows a second embodiment of a threading geometry according to the invention.
Detailed Description
Fig. 1 shows a sectional view of a dual mass flywheel 1 according to the prior art as a comparative example for understanding the invention. Such a dual mass flywheel 1 is arranged in the drive train of a motor vehicle between the crankshaft of the internal combustion engine and the vehicle clutch.
The axis of rotation of the dual mass flywheel is indicated by R in fig. 1. The rotational axis R is the rotational axis of the dual mass flywheel 1 and at the same time the rotational axis of a crankshaft of the internal combustion engine, not shown, and also the rotational axis of a vehicle clutch, likewise not shown, which is arranged downstream of the dual mass flywheel 1. In the following, an axial direction is understood to be a direction parallel to the rotation axis R, correspondingly a radial direction is understood to be a direction perpendicular to the rotation axis R, and a circumferential direction is understood to be a rotation around the rotation axis R.
The dual mass flywheel 1 comprises a primary mass or primary side 2 and a secondary mass or secondary side 3, which are rotatable relative to each other about an axis of rotation R against the force of two arcuate springs 4. The arc springs 4 are pressed outward against the primary mass 2 during operation by the centrifugal force acting thereon. On the radially outer side, a sliding housing 5 is therefore provided, which reduces the wear between the arc spring and the primary mass 2. The primary mass 2 comprises a motor-side primary mass plate 6 and a clutch-side primary mass cover 7. The primary mass plate 6 and the primary mass cover 7 enclose an arc-shaped spring receptacle 8 in which the arc-shaped spring 4 is arranged. The bow springs 4 are each supported by one spring end, as explained below by way of exemplary embodiments according to the invention, on the primary mass 2. By means of the respective further spring ends, the arcuate springs 4 are supported at the flange limbs 10 of the secondary flange 9. The secondary flange 9 can be connected to a component arranged downstream in the torque flow by means of rivets of the main riveting device, which are guided through the bores 11. The hole 12 in the primary mass plate 6 enables riveting of the main riveting device. The previously illustrated embodiment of a dual mass flywheel is known per se from the prior art, for example from DE 41 18 582 A1.
Fig. 2 shows a spatial view of the primary mass cover 7 according to the invention. The primary mass cover comprises an inner ring 13 which extends radially substantially in the installed position and which has, optionally at its outer ring periphery, in the installed position, a substantially axially extending sensing pin 14 which encloses the primary mass plate 6 on the outside and is part of a sensing device for determining the crank angle. The inner ring 13 has a circumferential molding 15 for receiving two arcuate springs. Two stamped-out parts are arranged opposite each other (offset by 190 °) in the stamped-out part 15 as arcuate spring stops 16, against which the four arcuate spring ends of the two arcuate springs are supported in the installed position. The bow springs 4 are preloaded, i.e. clamped in the rest position when the primary side and the secondary side are not rotated relative to each other, so that they are supported by spring force at the two bow spring stops 16.
The punch 16 has a stop edge 17 at its end in the circumferential direction. The bow spring 4 is supported by its spring end at the stop edge 17. The stop edges 17 for the arcuate springs 4 are arranged at a window angle FW relative to one another. The window angle is smaller than the angle enclosed by the two spring ends of one of the arcuate springs in the non-pretensioned state.
The two stampings 16 have a threading geometry according to the invention. In the embodiment of fig. 3, an inclined portion 18 is provided at both sides of the arc-shaped spring stopper 16. In this case, the rear face 20 of the curved spring stop 16 merges obliquely into the stop edges 17 at the two stop edges 17, so that the length of the rear face is less than the distance between the stop edges 17 due to the inclination. During installation, the spring ends of the arc spring stops, which can project beyond the primary mass plate 6 by the pretensioning of the arc spring, are pressed outward.
The inclined portions 18 each extend over a part of the stop edge 17, so that the arcuate spring stop 16 has, in addition, at the part adjoining the embossing 15, an axially extending stop edge 17, i.e. a stop edge 17 which is perpendicular to the spring end in the installed position, so that it exerts only a force in the circumferential direction and thus only a pressure force on the spring end. The inclined portion 18 is thus arranged within the turns of the bow spring 4 in the mounted position.
In the exemplary embodiment of fig. 4, press-in portions 19 are provided as lead-through geometries on both sides of the curved spring stop 16. For this purpose, the rear face 20 of the curved spring stop 16 is pressed outward in an oval or circular manner at both stop edges 17 on the side facing the curved spring receptacle 8, so that the stop edges 17 each have a concave press-in portion 19 as a lead-through geometry at their end faces. During installation, the outer diameter of the spring end of the bow spring 4 projects into the concave press-in portion 19 and is compressed by the contact surface running obliquely, so that the outer diameter of the bow spring 4 does not bear against the rear side 20 of the bow spring stop 16 and does not hinder installation.
List of reference numerals:
1. dual mass flywheel
2. Primary side
3. Secondary side
4. Arc spring
5. Sliding shell
6. Primary mass plate
7. Primary mass cover
8. Arc spring accommodating part
9. Secondary flange
10. Flange wing
11. Hole for a main riveting device
12. Holes in primary mass plates
13. Inner ring
14. Sensing pin
15. Die pressing part
16. Arc spring backstop
17. Stop edge
18. Inclined part
19. Concave press-in part
20. Back side of the plate
Claims (10)
1. A dual mass flywheel (1) having a primary mass (2) and a secondary mass (3) which can be rotated relative to one another against the action of at least one arcuate spring (4), wherein the arcuate spring (4) is arranged in an arcuate spring receptacle (8) of the primary mass (2) which is formed by a primary mass plate (6) and a primary mass cover (7), and wherein the arcuate spring (4) is supported at least one arcuate spring stop (16) at the primary mass plate (6) and/or at the primary mass cover (7),
it is characterized in that the preparation method is characterized in that,
the curved spring stop (16) has at least one lead-through geometry (18, 19).
2. A dual mass flywheel as defined in claim 1,
it is characterized in that the preparation method is characterized in that,
the arcuate spring (4) is supported with pretension on the primary mass plate (6) and/or on the primary mass cover (5) at the at least one arcuate spring stop (16).
3. A twin mass flywheel as defined in claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the dual mass flywheel has two arcuate springs (4) which are supported on two arcuate spring stops (16) at the primary mass plate (6) and/or at the primary mass cover (5).
4. A dual mass flywheel as defined in claim 3,
it is characterized in that the preparation method is characterized in that,
the arc-shaped spring stops (16) are arranged oppositely.
5. A dual mass flywheel according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the at least one lead-through geometry (18, 19) is arranged on the arcuate spring stop (16) of the primary mass cover (5).
6. A dual mass flywheel according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the at least one threading geometry comprises an inclined portion (18).
7. A dual mass flywheel as defined in claim 6,
it is characterized in that the preparation method is characterized in that,
the inclined portion (18) is arranged radially inside the turns of one or more of the bow springs (4) in the mounted position.
8. A twin mass flywheel as defined in any previous claim,
it is characterized in that the preparation method is characterized in that,
the at least one lead-through geometry comprises a concave indentation (19).
9. A dual mass flywheel according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the at least one arcuate spring stop (16) has a respective lead-through geometry (18, 19) on both sides in the circumferential direction.
10. A primary mass cover (7) for use in a dual mass flywheel (1) comprises at least one arcuate spring stop (16),
it is characterized in that the preparation method is characterized in that,
the at least one curved spring stop (16) has at least one lead-through geometry (18, 19).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021120850.5 | 2021-08-11 | ||
| DE102021120850.5A DE102021120850A1 (en) | 2021-08-11 | 2021-08-11 | Bow spring stop with threading geometry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115929845A true CN115929845A (en) | 2023-04-07 |
Family
ID=85039790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210922580.4A Pending CN115929845A (en) | 2021-08-11 | 2022-08-02 | Curved spring stop with threading geometry |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115929845A (en) |
| DE (1) | DE102021120850A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4117582B4 (en) | 1990-05-31 | 2008-02-14 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Torque transfer device |
-
2021
- 2021-08-11 DE DE102021120850.5A patent/DE102021120850A1/en active Pending
-
2022
- 2022-08-02 CN CN202210922580.4A patent/CN115929845A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021120850A1 (en) | 2023-02-16 |
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