US20030173165A1 - One-way braking device - Google Patents
One-way braking deviceDownload PDFInfo
- Publication number
- US20030173165A1 US20030173165A1US10/383,610US38361003AUS2003173165A1US 20030173165 A1US20030173165 A1US 20030173165A1US 38361003 AUS38361003 AUS 38361003AUS 2003173165 A1US2003173165 A1US 2003173165A1
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- United States
- Prior art keywords
- housing
- chamber
- circumference
- braking
- locking portion
- 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.)
- Abandoned
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- 230000000694effectsEffects0.000claimsabstractdescription7
- 239000012530fluidSubstances0.000claimsabstractdescription3
- 230000000295complement effectEffects0.000claimsdescription3
- 239000000463materialSubstances0.000claimsdescription3
- 238000010276constructionMethods0.000description2
- 238000007373indentationMethods0.000description2
- 229920002545silicone oilPolymers0.000description2
- 230000003993interactionEffects0.000description1
- 239000007788liquidSubstances0.000description1
- 238000005461lubricationMethods0.000description1
- 239000000758substrateSubstances0.000description1
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/12—Devices with one or more rotary vanes turning in the fluid any throttling effect being immaterial, i.e. damping by viscous shear effect only
Definitions
- the inventionrelates to a one-way braking device according to the preamble of claim 1.
- Rotary attenuatorsusually have a braking rotor which is rotatably supported in a casing. There is a viscous fluid in the housing, e.g. silicone oil. When the rotor rotates a respective resistance is produced which makes itself felt as a braking torque. An interaction with a toothed rod or toothed segment which is mounted on the component to be braked becomes possible via a shaft led out of the housing. The shaft has mostly seated thereon a pinion.
- Such rotary attenuatorsexist in most varied embodiments. They are employed, above all, in automobiles, electronic devices and the like. They have relatively small dimensions.
- the freewheelis formed between the housing of the rotary braking device and another housing which receives the first housing.
- the first housingis floatingly received in the chamber of the second housing and the circumference of the first housing and a portion of the wall of the second chamber are formed such that a positive interengagement takes place between these portions if they are moved against each other because of a linear force component acting between these portions.
- a force acting on the pinion of the braking deviceis braked by means of the braking rotor.
- the first and second housingsare acted on in a way that they get under a force opposed to the first force component the first housing can freely rotate in the second chamber of the second housing. Freewheeling is established for this case.
- the positive interengagement between the first and second housingsallows to transmit a large torque. In contrast, the torque is approximately zero in the freewheel direction.
- a circumference of the first housinghas a toothing and the second chamber has a toothed segment, the toothing and the toothed segment getting in engagement with each other in a braking operation and getting out of engagement in a freewheeling operation.
- the locking portionis defined by spaced locking edges which cooperate with the preferably cup-shaped or grooveshaped recesses at the circular circumference of the first casing.
- the circumference of the first housingis a polygon in section and the locking portion is shaped as a complementary polygonal portion.
- a positive interengagementis obtained also here when the first and second housings are pulled towards each other in such a way that the first housing gets into engagement with the locking portion of the second housing.
- the attenuator of the inventionis symmetric freewheeling may be obtained in either direction in different mounting situations.
- a braking deviceis provided which is independent on the direction in which a braking torque or freewheeling is to be produced.
- only one series of toolsneeds to be manufactured to produce the parts of the inventive braking device which are preferably made of a plastic material.
- Another advantageis that the assembly of the braking device may be fully automatic. This makes unnecessary any manual preassembly as has been required for former one-way rotary brakes.
- the size of construction of the inventive braking deviceis random and, in particular, may be built to be very small.
- the material for the braking rotor and casingmay be the same and preferably is a plastic. This also reduces the expenditure for the inventive braking device.
- FIG. 1schematically shows a first embodiment of a braking device according to the invention.
- FIG. 2schematically shows a second embodiment of a braking device according to the invention.
- FIG. 3Schematically shows a third embodiment of a braking device according to the invention.
- FIG. 4shows a section through the representation of FIG. 3 along line 4 - 4 .
- FIGS. 5 - 8show the braking device of FIG. 4 at different stages of assembly.
- FIGS. 1 through 3schematically show three rotary attenuators which respectively have a housing 10 a , 10 b , 10 c with diametrically opposed flanges 12 , 14 to be fixed to a substrate.
- the housings 10 a through 10 crespectively have an internal chamber 16 a , 16 b , 16 c .
- the chamberrespectively has disposed therein a second housing 18 a , 18 b , 18 c.
- the outer circumference of the casing 18 ais configured as a polygon.
- the outer circumference of the casing 18 bis circular and is formed with groove-shaped indentations 20 at the circumference.
- the circumference of the casing 18 cis circular and is provided with a toothing 22 .
- the wall of the chamber 16 ais formed with a complementary polygon of the casing 18 a over a certain area at 24 .
- the chamber 16 bhas an extension 26 by which two locking edges 28 and 30 are defined at the ends of the extension 26 , as viewed in a circumferential direction.
- the wall of the chamber 16 chas a toothed portion 32 .
- FIG. 4is intended to be a section through the representation of FIG. 3, but could also represent a section through FIGS. 1 and 2.
- the flange portions 12 , 14form part of a component 34 of the housing 10 c which has a lower plate 36 and an annular portion 38 .
- Plate 36 and annular portion 38define the chamber 16 c .
- the annular portion 38has put thereon a cap 40 which forms a snapping connection along with the outer side of the annular portion as can be seen at 42 .
- the top wall of the cap 40has a central aperture 44 .
- the housing 18 chas a first portion 46 and a second portion 48 which are introduced into each other and are appropriately connected to each other.
- the housing 18 chas formed therein a chamber 48 which accommodates a braking rotor 50 which is rotatably and sealedly supported by a shaft butt end 52 in the housing portion 46 .
- the shaft butt endextends to the outside of the housing 10 c through an opening 44 and the outer portion of the shaft butt end 52 has seated thereon a pinion 54 .
- a braking actionappears if the chamber 38 is filled with a viscous liquid, e.g. silicone oil. This action is generally known for rotary attenuators up to this point.
- FIGS. 1 through 3It is evident from FIGS. 1 through 3 that a positive interengagement can be established, for instance, between the housings 10 a and 18 a in FIG. 1 and prevents a relative rotation between the housings when the housing 18 a is moved towards portion 24 . In this case, a torque applied to the pinion 54 is braked in a known manner. On the contrary, if the housing 18 a is moved to the opposite direction a free rotation may occur between casings 10 a and 18 a , which results in freewheeling if a torque is applied to the pinion 54 .
- the rotary attenuator of FIG. 2reacts similarly.
- the positive interengagementis established with the indentations 16 b by the locking edges 28 and 30 .
- the positive interengagementis established between the toothing 22 of the housing 18 c and the toothed portion 32 of the housing 10 c.
- the effect describedpresupposes that, apart from a torque applied to the pinion, a linear force component will act on the housing 18 a to 18 c which either establishes or eliminates the positive interengagement described. This is the case, for instance, if a toothed rod engages the pinion 54 as is described in the context of FIGS. 5 through 8. It further presupposes that the housing 18 a , 18 b , and 18 c is floatingly received each in the chamber 18 a , 18 b , and 18 c of the housing 10 a , 10 b , 10 c , respectively.
- FIGS. 5 through 8illustrate the rotary brake 30 d in a way approximately similar to that of FIG. 2 in different positions.
- a toothed rod 22 ais disposed below a pinion 40 d and a braking effect will result when the toothed rod 22 d moves to the right, and a freewheeling effect will result when it moves to the left.
- the housing of FIG. 6is disposed as that of FIG. 5, but the toothed rod 22 d is disposed above the pinion 40 d .
- a rightward movement of the toothed rod 22 dagain results in braking and a leftward movement results in freewheeling.
- the housing 32 dis turned through 180°.
- a rightward movement of the toothed rod 22 d of FIG. 7 which is disposed aboveresults in freewheeling and a leftward movement results in braking.
- the toothed rod 22 d of FIG. 8 which is disposed belowcauses a freewheeling effect when moved to the right and causes braking when moved to the left.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
- The invention relates to a one-way braking device according to the preamble of claim 1.[0001]
- More particularly, the invention relates to rotary attenuators. Rotary attenuators usually have a braking rotor which is rotatably supported in a casing. There is a viscous fluid in the housing, e.g. silicone oil. When the rotor rotates a respective resistance is produced which makes itself felt as a braking torque. An interaction with a toothed rod or toothed segment which is mounted on the component to be braked becomes possible via a shaft led out of the housing. The shaft has mostly seated thereon a pinion. Such rotary attenuators exist in most varied embodiments. They are employed, above all, in automobiles, electronic devices and the like. They have relatively small dimensions.[0002]
- Unless particular provisions are made the braking action of such rotary brakes is symmetric. The braking torque obtained in either sense of rotation is approximately the same. However, a one-sided braking effect is desirable in some applications so that freewheeling is intended to act in the inverse direction. Known freewheeling systems require a wrap spring, a bipartite axle as well as an extra metallic bushing with a lubrication to transmit forces. The wrap spring cannot be mounted by automatic machines so that mounting one-way rotary attenuators of this type involves relatively great expenditure .[0003]
- It is the object of the invention to improve a braking device of the aforementioned type in such a way that this reduces the mounting expenditure and allows to realize a small size of construction.[0004]
- This object is attained by the features of claim 1.[0005]
- In the inventive braking device, the freewheel is formed between the housing of the rotary braking device and another housing which receives the first housing. The first housing is floatingly received in the chamber of the second housing and the circumference of the first housing and a portion of the wall of the second chamber are formed such that a positive interengagement takes place between these portions if they are moved against each other because of a linear force component acting between these portions. In such a case, a force acting on the pinion of the braking device is braked by means of the braking rotor. On the contrary, if the first and second housings are acted on in a way that they get under a force opposed to the first force component the first housing can freely rotate in the second chamber of the second housing. Freewheeling is established for this case. The positive interengagement between the first and second housings allows to transmit a large torque. In contrast, the torque is approximately zero in the freewheel direction.[0006]
- According to an aspect of the invention, a circumference of the first housing has a toothing and the second chamber has a toothed segment, the toothing and the toothed segment getting in engagement with each other in a braking operation and getting out of engagement in a freewheeling operation.[0007]
- According to another aspect of the invention, the locking portion is defined by spaced locking edges which cooperate with the preferably cup-shaped or grooveshaped recesses at the circular circumference of the first casing.[0008]
- According to another aspect of the invention, the circumference of the first housing is a polygon in section and the locking portion is shaped as a complementary polygonal portion. A positive interengagement is obtained also here when the first and second housings are pulled towards each other in such a way that the first housing gets into engagement with the locking portion of the second housing.[0009]
- Since the attenuator of the invention is symmetric freewheeling may be obtained in either direction in different mounting situations. Thus, a braking device is provided which is independent on the direction in which a braking torque or freewheeling is to be produced. Thus, only one series of tools needs to be manufactured to produce the parts of the inventive braking device which are preferably made of a plastic material.[0010]
- Another advantage is that the assembly of the braking device may be fully automatic. This makes unnecessary any manual preassembly as has been required for former one-way rotary brakes.[0011]
- The size of construction of the inventive braking device is random and, in particular, may be built to be very small.[0012]
- The material for the braking rotor and casing may be the same and preferably is a plastic. This also reduces the expenditure for the inventive braking device.[0013]
- The invention will now be described in more detail with reference to embodiments.[0014]
- FIG. 1 schematically shows a first embodiment of a braking device according to the invention.[0015]
- FIG. 2 schematically shows a second embodiment of a braking device according to the invention.[0016]
- FIG. 3 Schematically shows a third embodiment of a braking device according to the invention.[0017]
- FIG. 4 shows a section through the representation of FIG. 3 along line[0018]4-4.
- FIGS.[0019]5-8 show the braking device of FIG. 4 at different stages of assembly.
- FIGS. 1 through 3 schematically show three rotary attenuators which respectively have a[0020]
housing 10a,10b,10cwith diametrically opposedflanges internal chamber second housing - The outer circumference of the[0021]
casing 18ais configured as a polygon. The outer circumference of the casing18bis circular and is formed with groove-shaped indentations 20 at the circumference. The circumference of thecasing 18cis circular and is provided with atoothing 22. It can be seen that the wall of thechamber 16ais formed with a complementary polygon of thecasing 18aover a certain area at24. In FIG. 2, in the area of theupper flange 12, the chamber16bhas anextension 26 by which twolocking edges extension 26, as viewed in a circumferential direction. In the embodiment of FIG. 3, the wall of thechamber 16chas atoothed portion 32. - The internal structure of the rotary attenuators illustrated in FIGS. 1 through 3 is apparent from FIG. 4. FIG. 4 is intended to be a section through the representation of FIG. 3, but could also represent a section through FIGS. 1 and 2.[0022]
- The[0023]
flange portions component 34 of thehousing 10cwhich has alower plate 36 and anannular portion 38.Plate 36 andannular portion 38 define thechamber 16c. Theannular portion 38 has put thereon acap 40 which forms a snapping connection along with the outer side of the annular portion as can be seen at42. The top wall of thecap 40 has acentral aperture 44. - The[0024]
housing 18chas afirst portion 46 and asecond portion 48 which are introduced into each other and are appropriately connected to each other. Thehousing 18chas formed therein achamber 48 which accommodates abraking rotor 50 which is rotatably and sealedly supported by ashaft butt end 52 in thehousing portion 46. The shaft butt end extends to the outside of thehousing 10cthrough anopening 44 and the outer portion of theshaft butt end 52 has seated thereon apinion 54. While thebraking rotor 50 rotates relative to thehousing 18cin the chamber48 a braking action appears if thechamber 38 is filled with a viscous liquid, e.g. silicone oil. This action is generally known for rotary attenuators up to this point. - It is evident from FIGS. 1 through 3 that a positive interengagement can be established, for instance, between the[0025]
housings 10aand18ain FIG. 1 and prevents a relative rotation between the housings when thehousing 18ais moved towardsportion 24. In this case, a torque applied to thepinion 54 is braked in a known manner. On the contrary, if thehousing 18ais moved to the opposite direction a free rotation may occur betweencasings 10aand18a, which results in freewheeling if a torque is applied to thepinion 54. - The rotary attenuator of FIG. 2 reacts similarly. In this case, the positive interengagement is established with the indentations[0026]16bby the locking edges28 and30. In the embodiment of FIG. 3, the positive interengagement is established between the
toothing 22 of thehousing 18cand thetoothed portion 32 of thehousing 10c. - The effect described presupposes that, apart from a torque applied to the pinion, a linear force component will act on the[0027]
housing 18ato18cwhich either establishes or eliminates the positive interengagement described. This is the case, for instance, if a toothed rod engages thepinion 54 as is described in the context of FIGS. 5 through 8. It further presupposes that thehousing chamber housing 10a,10b,10c, respectively. - FIGS. 5 through 8 illustrate the[0028]
rotary brake 30d in a way approximately similar to that of FIG. 2 in different positions. In FIG. 5, a toothed rod22ais disposed below apinion 40dand a braking effect will result when thetoothed rod 22dmoves to the right, and a freewheeling effect will result when it moves to the left. The housing of FIG. 6 is disposed as that of FIG. 5, but thetoothed rod 22dis disposed above thepinion 40d. A rightward movement of thetoothed rod 22dagain results in braking and a leftward movement results in freewheeling. - In the embodiment of FIGS. 7 and 8, the[0029]
housing 32dis turned through 180°. A rightward movement of thetoothed rod 22dof FIG. 7 which is disposed above results in freewheeling and a leftward movement results in braking. Thetoothed rod 22dof FIG. 8 which is disposed below causes a freewheeling effect when moved to the right and causes braking when moved to the left.
Claims (7)
1. A one way braking means comprising a first sealed chamber filled with a viscous fluid, a braking rotor being rotably supported within the chamber, a housing or the braking rotor, respectively, coacting with a pinion which in turn cooperates with a tooth rod or a gear or the like, characterized in that the first housing (18a,18b,18c) is floatingly supported in a second chamber (16a,16b,16c) of a second housing (10a,10b,10c), the circumference of the first housing (18a,18b,18c) and a locking portion of the wall of the second chamber (16a,16b,16c) are formed such that a positive interengagement between first and second housing (18a,18b,18c;10a,10b,10c) takes place if by a linear first force component the first housing (18a,18b,18c) and the locking portion are moved against each other and that a free running between first and second housing is effected when a second force component opposite to the first component effects between first and second housing (18a,18b,18c;10a,10b,10c).
2. The means ofclaim 1 , wherein a circumference of the first housing (18a,18b,18c) has a toothing (22) and the second chamber (16c) has toothed portion (32).
3. The means ofclaim 1 , wherein the locking portion has two spaced locking edges (28,30) which cooperate with preferably groove shaped recesses (20) at the circular circumference of the first housing (18b)
4. The means ofclaim 1 , wherein the circumference of the first housing (18a) is a polygon in section and the locking portion is shaped as complementary polygonal portion (24).
5. The means of one of theclaims 1 to4 , wherein the second chamber (16c) of the second housing (10c) is defined within an annular portion (38), the open side of the annular portion (38) is covered by a cap which overgrips the annular portion (38).
6. The means of one of theclaims 1 to4 , wherein the whole parts are molded of plastic material.
7. The means of claims5 and6, wherein the cap (40) forms a snapping connection with the annular portion (38).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/030,198US7059454B2 (en) | 2002-03-13 | 2005-01-07 | One-way braking device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10210917ADE10210917C1 (en) | 2002-03-13 | 2002-03-13 | Braking device with freewheel |
| DE10210917.6 | 2002-03-13 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/030,198ContinuationUS7059454B2 (en) | 2002-03-13 | 2005-01-07 | One-way braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20030173165A1true US20030173165A1 (en) | 2003-09-18 |
Family
ID=27762888
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/383,610AbandonedUS20030173165A1 (en) | 2002-03-13 | 2003-03-10 | One-way braking device |
| US11/030,198Expired - LifetimeUS7059454B2 (en) | 2002-03-13 | 2005-01-07 | One-way braking device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/030,198Expired - LifetimeUS7059454B2 (en) | 2002-03-13 | 2005-01-07 | One-way braking device |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US20030173165A1 (en) |
| EP (1) | EP1344958B1 (en) |
| JP (1) | JP4080921B2 (en) |
| CA (1) | CA2421982C (en) |
| DE (2) | DE10210917C1 (en) |
| ES (1) | ES2283666T3 (en) |
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| JPH0668300B2 (en)* | 1990-05-18 | 1994-08-31 | トックベアリング株式会社 | One-way damper |
| DE4135216A1 (en)* | 1991-10-25 | 1993-04-29 | Fischer Artur Werke Gmbh | DAMPING ELEMENT FOR DAMPING A PUSH MOVEMENT |
| DE29518173U1 (en)* | 1995-11-16 | 1996-01-11 | Itw-Ateco Gmbh, 22844 Norderstedt | Device for damping the movement of a movably mounted component, in particular a flap in an automobile or the like. |
| DE19729900C1 (en)* | 1997-07-12 | 1998-10-01 | Daimler Benz Ag | Damping device e.g. for motor vehicle glove box |
| AT412183B (en)* | 2001-01-25 | 2004-11-25 | Blum Gmbh Julius | DAMPING DEVICE FOR MOVABLE FURNITURE PARTS |
- 2002
- 2002-03-13DEDE10210917Apatent/DE10210917C1/ennot_activeExpired - Fee Related
- 2003
- 2003-02-20ESES03003796Tpatent/ES2283666T3/ennot_activeExpired - Lifetime
- 2003-02-20DEDE60313070Tpatent/DE60313070T2/ennot_activeExpired - Lifetime
- 2003-02-20EPEP03003796Apatent/EP1344958B1/ennot_activeExpired - Lifetime
- 2003-03-10USUS10/383,610patent/US20030173165A1/ennot_activeAbandoned
- 2003-03-12JPJP2003066535Apatent/JP4080921B2/ennot_activeExpired - Fee Related
- 2003-03-12CACA002421982Apatent/CA2421982C/ennot_activeExpired - Fee Related
- 2005
- 2005-01-07USUS11/030,198patent/US7059454B2/ennot_activeExpired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9103390B2 (en) | 2011-05-16 | 2015-08-11 | Nifco Inc. | Rotary damper device with one-way clutch |
| US9574386B2 (en) | 2015-01-23 | 2017-02-21 | Dr. Ing. H.C.F. Porsche Aktiengesellschaft | Opening apparatus for a tailgate of a motor vehicle |
| CN113825925A (en)* | 2019-05-28 | 2021-12-21 | 百乐仕株式会社 | Damper device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1344958B1 (en) | 2007-04-11 |
| DE60313070D1 (en) | 2007-05-24 |
| JP2003269500A (en) | 2003-09-25 |
| DE60313070T2 (en) | 2007-12-20 |
| CA2421982C (en) | 2008-12-09 |
| ES2283666T3 (en) | 2007-11-01 |
| US7059454B2 (en) | 2006-06-13 |
| JP4080921B2 (en) | 2008-04-23 |
| EP1344958A3 (en) | 2004-01-02 |
| EP1344958A2 (en) | 2003-09-17 |
| US20050115784A1 (en) | 2005-06-02 |
| CA2421982A1 (en) | 2003-09-13 |
| DE10210917C1 (en) | 2003-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment | Owner name:ITW AUTOMOTIVE PRODUCTS GMBH & CO. KG, GERMANY Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MULLER, HANS-GUNTHER;BREUNIG, STEFFEN;VORBACH, MANFRED;REEL/FRAME:013871/0644;SIGNING DATES FROM 20030109 TO 20030205 | |
| STCB | Information on status: application discontinuation | Free format text:ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |