CN221237111U - Improved viscous damper - Google Patents
Improved viscous damper Download PDFInfo
- Publication number
- CN221237111U CN221237111U CN202322240402.6U CN202322240402U CN221237111U CN 221237111 U CN221237111 U CN 221237111U CN 202322240402 U CN202322240402 U CN 202322240402U CN 221237111 U CN221237111 U CN 221237111U
- Authority
- CN
- China
- Prior art keywords
- hole
- cup
- viscous damper
- pin
- viscous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
- F16F15/167—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material having an inertia member, e.g. ring
- F16F15/173—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material having an inertia member, e.g. ring provided within a closed housing
-
- 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
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
一种改进的粘性阻尼器(1)，其包括彼此刚性连接以限定空间(4)的杯状元件(2)和盖(3)，以及与粘性介质一起容纳在空间(4)中的旋转元件(5)，杯状元件(2)限定至少一个孔(7)，至少一个孔(7)配置成在阻尼器(1)的组装期间将粘性介质插入空间(4)中，孔(7)在使用中容纳销(8)，销(8)以预定义的径向预紧力容纳在孔(7)中。
An improved viscous damper (1) comprises a cup-shaped element (2) and a cover (3) rigidly connected to each other to define a space (4), and a rotating element (5) received in the space (4) together with a viscous medium, the cup-shaped element (2) defining at least one hole (7), the at least one hole (7) being configured to insert the viscous medium into the space (4) during assembly of the damper (1), the hole (7) receiving a pin (8) in use, the pin (8) being received in the hole (7) with a predefined radial preload.
Description
Cross Reference to Related Applications
The present patent application claims priority from italian/european patent application No. 102022000020292 filed on month 10 and 3 of 2022, the entire disclosure of which is incorporated herein by reference.
Technical Field
The utility model relates to a damper, in particular a viscous damper (viscous damper) for a motor vehicle.
The utility model is preferably, but not exclusively, applied to damping crankshaft vibrations of an internal combustion engine. The application will be mentioned below by way of example.
Background
In the motor industry, the amplitude of the torsional vibrations of the drive shaft is typically reduced by using a damper, which is superior in terms of its working principle, i.e. based on the means used for damping the vibrations.
Torsional vibration friction dampers have been widely used in the past in motor vehicle engines; generally, the damper comprises a flywheel which is driven to rotate by a driving shaft through a friction coupling; due to its high moment of inertia, the flywheel tends to exhibit a constant rotational speed, thereby damping any torsional vibrations of the drive shaft by friction.
For motor vehicle applications with higher specific power, dampers using elastic materials or viscoelastic fluids as damping means are employed, the principle of operation of which is similar to that cited above. In the case of a viscoelastic fluid damper, the coupling between the drive shaft and the flywheel is obtained by the insertion of a viscous medium (typically a silicone fluid).
The fluid is inserted into the space housing the rotating element/flywheel and is delimited by a cup-shaped portion and a disc rigidly connected to the cup-shaped portion.
In the cup-shaped portion, a hole is usually provided, which allows to introduce viscous medium into the space accommodating the rotating element/flywheel once the disc is rigidly connected to the above-mentioned cup-shaped portion.
The holes are normally closed by plug elements, as described for example in patent JP2007177851, JP2007177852 or WO96/27748A 1.
However, the above-described closure is not effective in sealing, also taking into account the variations in operating temperature to which the damper is subjected.
Accordingly, it is desirable to provide a viscous-type damper that has high sealing properties so as to prevent viscous medium from flowing out.
The object of the present utility model is to meet the above-mentioned needs in an optimised, inexpensive manner.
Disclosure of utility model
The above object is achieved by a viscous damper 1, the viscous damper 1 rotating about an a-axis and comprising a cup-shaped element 2 and a cover 3 rigidly connected to each other to define a space 4; the damper 1 comprises a rotary element 5 accommodated in the space 4 together with a viscous medium, the cup-shaped element 2 defining at least one hole 7, the at least one hole 7 being configured to insert said viscous medium into said space 4 during assembly of the damper 1; the hole 7 accommodates, in use, a pin 8, the pin 8 being accommodated in the hole 7 with a predefined radial preload (preload), said pin 8 being a chamfer-treated pin,
Wherein the rotary element 5 defines a seat 9 at the at least one hole 7, the seat 9 being annular about the a axis and radially coinciding with the axis of the at least one hole 7.
In particular, the pin 8 is made of aluminium or steel.
Advantageously, the cup-shaped element 2 and/or the cover 3 are made of aluminium or steel.
In particular, the viscous medium is silicone oil.
Preferably, the rotary element 5 is housed with respect to the cup-shaped element 2 and/or the cover 3 by sliding support means.
In particular, the sliding support means comprise at least one bushing 6.
In detail, the cup-shaped element 2 comprises an outer cylindrical portion 2a, a radial portion 2b and an inner cylindrical portion 2c, at least one hole 7 being provided on the radial portion 2 b.
Drawings
For a better understanding of the utility model, preferred embodiments are described below by way of non-limiting example and with reference to the accompanying drawings, in which:
FIG. 1 is a radial cross-sectional view of a viscous damper according to the present utility model;
fig. 2 is an enlarged view of a portion of the viscous damper of fig. 1.
Detailed Description
Fig. 1 shows a viscous damper 1 according to the utility model comprising mainly an annular cup-shaped element 2 rotating about an a-axis.
The cup-shaped element 2 is advantageously fitted on a rotating hub (not shown) driven in rotation about the a-axis by the shaft of the internal combustion engine.
In particular, the cup-shaped element 2 mainly comprises an outer cylindrical portion 2a, a radial portion 2b cantilevered radially with respect to the a axis from one end of the outer cylindrical portion 2a, and an inner cylindrical portion 2c connected at one end thereof to the radial wall 2 b.
Advantageously, the outer cylindrical portion 2a comprises a cylindrical wall coaxial with the a axis, the radial portion 2b comprises a wall extending perpendicular to the outer cylindrical portion 2a, and the inner cylindrical portion 2c is connected at one end to the same side of the outer cylindrical portion 2a and shaped to allow its fixing to the hub described above.
Preferably, the cup-shaped element 2 is made of a metallic material, such as aluminium or steel.
The damper 1 further comprises a cover 3, the cover 3 being carried by the cup-shaped element 2 and being configured to define a space 4 together with the outer cylindrical portion 2a, the radial portion 2b and the inner cylindrical portion 2c of the cup-shaped element 2.
In particular, the cover 3 is rigidly connected (fixed, for example by welding) to the outer cylindrical portion 2a and to the inner cylindrical portion 2c on opposite sides of the radial portion 2 b. Thus, the space 4 is delimited axially along the a-axis by the radial portion 2b and the cover 3, while it is delimited radially with respect to the a-axis between the outer cylindrical portion 2a and the inner cylindrical portion 2c.
Thus, according to the above, the cover 3 has an annular shape and is advantageously a flat element, such as an annular disc.
As is known per se, the space 4 is sized to accommodate a rotating element 5, the rotating element 5 being advantageously annular in shape and configured to rotate about an a-axis. Preferably, the rotating element 5 is made of a metallic material, such as aluminium or steel.
Advantageously, the rotary element 5 is supported with respect to the cup-shaped element 2 by sliding support means. Advantageously, the sliding support means comprise bushings 6, such as L-shaped bushings. In particular, said bushing 6 is interposed between the rotating element 5 and the inner cylindrical portion 2 c; more preferably L-shaped, between the rotating element 5, the inner cylindrical portion 2c and the cover 3, and between the rotating element 5, the inner cylindrical portion 2c and the radial portion 2b, respectively.
In addition to the rotating element 5, the space 4 is configured to contain a viscous medium, such as, for example, a silicone fluid. For the insertion of said viscous medium, the cup-shaped element 2 defines a hole or several through holes 7, the hole or holes 7 being configured to allow the space 4 to communicate with the outside. In the illustrated embodiment, the above-mentioned holes 7 are provided in the radial wall 2 b. It is clear that several holes 7 may be present, as shown for example in fig. 1, for illustrative purposes only.
In the vicinity of the hole 7, in particular at its axis, the rotary element 5 may additionally define a seat 9, the seat 9 being configured to facilitate the insertion of fluid inside the space 4, so as to avoid overpressure during the injection of fluid and to act as a "reservoir" during the operation of the damper.
Advantageously, the seat 9 has an annular shape coaxial with the a axis and radially coincides with the axis of the hole 7.
The viscous damper further comprises a pin 8, the pin 8 being configured to be received inside the hole 7 as a seal in order to fluidly isolate the space 4 from the outside. In particular, the pin 8 is housed inside the hole 7 with radial preload.
In more detail, the axial dimension of the pin 8 is smaller than the thickness of the wall and of the cup-shaped element 2.
Advantageously, the pin 8 is chamfered so that it can be chamfered at the outside of the wall of the cup-shaped element 2 with respect to the space 4.
In particular, the pin 8 has a substantially cylindrical shape and a chamfer is provided at the axial end. Preferably, the pin 8 is made of a metallic material, such as aluminum or steel.
The viscous damper embodiment described above operates as follows.
In a standard operating procedure, the cup-shaped element 2 is driven by the hub to which it is connected. The rotation of the cup-shaped member 2 causes the rotation of the viscous medium, which drives the rotation of the rotation member 5 with an angular delay due to the viscosity of the viscous medium. The vibrations of the hub 2 are suppressed by friction due to the offset resistance between the rotating element 5 and the cup-shaped element 2, which is known per se.
The damper 1 is assembled as follows. The rotary element 5 is inserted in the cup-shaped element 2 in which the sliding means are inserted; the rotating element is closed by a cover 3 welded to the cup-shaped element. When the cup-shaped element 2 is turned over, the space 4 is filled with viscous medium through the at least one hole 7; the pin 8 is then pushed in and chamfered to completely seal the hole 7.
From the above, the advantages of the viscous damper according to the present utility model are apparent.
Good sealing and simple assembly are ensured by compressing the pins inserted into the holes.
Also, the fact that the pin is chamfered increases the sealing of the damper, since the chamfered material ensures a seal between the pin 8 and the hole 7.
Finally, it is clear that modifications and variations may be made to the viscous damper according to the utility model without departing from the scope of protection as defined in the claims.
Obviously, the composition of the damper, the shape of the rotating element and the nature of the viscous medium may vary.
Similarly, the number of pins and holes may be increased, made of different materials and have different shapes. In particular, they can be calibrated for different pretensions.
Claims (7)
1. A viscous damper (1) rotatable about an axis (a) and comprising a cup-shaped element (2) and a cover (3) rigidly connected to each other to define a space (4), characterized in that the viscous damper (1) comprises a rotatable element (5) accommodated in the space (4) together with a viscous medium, the cup-shaped element (2) defining at least one hole (7), the at least one hole (7) being configured to insert the viscous medium into the space (4) during assembly of the viscous damper (1), the at least one hole (7) accommodating, in use, a pin (8), the pin (8) being accommodated in the at least one hole (7) with a predefined radial pre-tension, the pin (8) being a chamfer-treated pin,
Wherein the rotary element (5) defines a seat (9) at the at least one hole (7), the seat (9) being annular about the axis (a) and radially coinciding with the axis of the at least one hole (7).
2. Viscous damper according to claim 1, characterized in that the pin (8) is made of aluminium or steel.
3. Viscous damper according to claim 1, characterized in that the cup-shaped element (2) and/or the cover (3) are made of aluminium or steel.
4. A viscous damper according to any one of claims 1-3, characterized in that the viscous medium is silicone oil.
5. A viscous damper according to any one of claims 1-3, characterized in that the rotary element (5) is accommodated relative to the cup-shaped element (2) and/or the cover (3) by sliding support means.
6. Viscous damper according to claim 5, characterized in that the sliding support means comprise at least one bushing (6).
7. A viscous damper according to any one of claims 1-3, characterized in that the cup-shaped element (2) comprises an outer cylindrical portion (2 a), a radial portion (2 b) and an inner cylindrical portion (2 c), the at least one hole (7) being formed on the radial portion (2 b).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102022000020292A IT202200020292A1 (en) | 2022-10-03 | 2022-10-03 | IMPROVED VISCOUS DAMPER |
| IT102022000020292 | 2022-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221237111U true CN221237111U (en) | 2024-06-28 |
Family
ID=84462771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322240402.6U Active CN221237111U (en) | 2022-10-03 | 2023-08-21 | Improved viscous damper |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN221237111U (en) |
| DE (1) | DE202023104702U1 (en) |
| IT (1) | IT202200020292A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2741124A1 (en) * | 1977-09-13 | 1979-03-22 | Maschf Augsburg Nuernberg Ag | Oscillation damper with slipping flywheel - has housing defining annular viscous fluid chamber and sealing rings to protect bearings |
| US5058453A (en) * | 1989-05-05 | 1991-10-22 | Caterpillar Inc. | Torsional vibration damper |
| DE19507519A1 (en) | 1995-03-03 | 1996-09-26 | Hasse & Wrede Gmbh | Viscosity torsional vibration damper |
| GB2387881B (en) * | 2002-04-23 | 2005-11-09 | Metaldyne Internat | Method of bearing construction |
| JP2007177852A (en) | 2005-12-27 | 2007-07-12 | Fukoku Co Ltd | Viscous damper |
| JP2007177851A (en) | 2005-12-27 | 2007-07-12 | Fukoku Co Ltd | Viscous damper |
-
2022
- 2022-10-03 IT IT102022000020292A patent/IT202200020292A1/en unknown
-
2023
- 2023-08-18 DE DE202023104702.5U patent/DE202023104702U1/en active Active
- 2023-08-21 CN CN202322240402.6U patent/CN221237111U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202023104702U1 (en) | 2023-10-06 |
| IT202200020292A1 (en) | 2024-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101360890B (en) | Camshaft adjuster for an internal combustion engine | |
| KR101445587B1 (en) | Lockup device for torque converter | |
| KR101366107B1 (en) | Flexible coupling with hydraulic vibration damper | |
| US20040185940A1 (en) | Damper mechanism and damper disk assembly | |
| US9556944B2 (en) | Vibration damping device | |
| CN107614918A (en) | improved isolating device | |
| CN203348427U (en) | Torque Fluctuation Absorber | |
| CN102472361A (en) | Torsional damper | |
| CN106499771B (en) | Torsional damper with independently rotating inertial mass and crankshaft thereof | |
| JP2017075694A (en) | Torque transmission device for automobile | |
| JP2017075694A5 (en) | ||
| JPH1054443A (en) | Components for rotary motion transmission and torsional vibration damping | |
| SE434558B (en) | TORSIONSVIBRATIONSDEMPARE | |
| CN111630298A (en) | Pulley decoupler with centrifugal pendulum device including first friction device | |
| CN110848325B (en) | torsional vibration damper | |
| JP5960559B2 (en) | Torque fluctuation reduction device | |
| JPH02278019A (en) | Elastic coupling | |
| KR20080030625A (en) | Rotary torque transmission device | |
| JP6288885B2 (en) | Bearing device and rotating machine | |
| CN205745094U (en) | Torsional vibrations damping assembly | |
| JP3264292B2 (en) | Torsional vibration damping device | |
| JP2007315416A (en) | Viscous rubber damper | |
| JP5306433B2 (en) | Torque fluctuation absorber | |
| CN112283296B (en) | Torsional vibration damper | |
| US7455158B2 (en) | Viscous fluid coupling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Ivrea, Turin Province, Italy Patentee after: Muweike Co.,Ltd. Country or region after: Italy Address before: Italy Province, Turin Patentee before: Drive Systems Co.,Ltd. Country or region before: Italy |