GB2200717A - Vibration absorber for vehicles - Google Patents
Vibration absorber for vehicles Download PDFInfo
- Publication number
- GB2200717A GB2200717A GB08801567A GB8801567A GB2200717A GB 2200717 A GB2200717 A GB 2200717A GB 08801567 A GB08801567 A GB 08801567A GB 8801567 A GB8801567 A GB 8801567A GB 2200717 A GB2200717 A GB 2200717A
- Authority
- GB
- United Kingdom
- Prior art keywords
- telescopic leg
- distinguished
- leg according
- equalization piece
- longitudinal equalization
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/001—Arrangements for attachment of dampers
- B60G13/005—Arrangements for attachment of dampers characterised by the mounting on the axle or suspension arm of the damper unit
- B60G13/006—Arrangements for attachment of dampers characterised by the mounting on the axle or suspension arm of the damper unit on the stub axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
-
- 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
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
- F16F9/364—Combination of sealing and guide arrangements for piston rods of multi-tube dampers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/129—Damper mount on wheel suspension or knuckle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Closures For Containers (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A vibration absorber for vehicles consists of a receptacle which at one end has a guide and a seal for a piston rod 4 and a closure or stop cap 5. A retainer 6 welded to the cap 5 supports a member 7 which in use engages a buffer 25 to limit the return travel of the piston rod 4. Preferably the member 7 is of plastics and has a snap fit with the retainer 6, thus allowing members 7 of differing axial length to be used. In an alternative embodiment (Fig. 4) the stop cap and member form a single unit. <IMAGE>
Description
TITLE: Telescopic leg or vibration absorber for vehicles
The invention concerns a telescopic leg or vibration absorber for
vehicles according. t,o the preamble of Claim 1.
With vibration absorbers or telescopic legs of this kind the
front of the receptacle is designed as a stop for limiting the
stroke of the returning piston rod. It is knows through DE-GM 7
834 927 that this front stop acts in combination with a hollow 'rubber spring which is located outside the receptainle on the
piston rod and comes t a stop on te receptacle front from a
specific return travel of the piston rod into the receptacle
onwards. In addition the receptacle is fitted with a stop cap
which is designed in such a way that the inside of the hollow
rubber spring is connected through vent ducts with the atmosphere
surrounding the shock absorber and a limitation of the stroke of
the returning piston rod is thereby obtained at the same time.
The adjustment of the vibration absorber to a pre-set spring
excursion is effected by the free stroke length of the piston
rod, so that if the spring excursion is shortened slightly a
correspondingly modified receptacle length is required.
The aim of the present invention is to create a telescopic leg or
vibration absorber which exhibits a shortened piston rod stroke
with the minimum expenditiere such as is often required for
example if the spring excursion is designed for a sports car.
This aim is achieved by the stop cap being constructed as a
support for a longitudinal equalization piece extending in an
axial direction and by providing a seat with which the equalization piece engages. Such a longitudinal equalization piece enables the required adjustment to the shortened spring excursion to be achieved with minimum expenditure, i.e. without specifying a modified receptacle length.
According to the invention a detachable connection is located between stop cap and longitudinal equalization piece whereby ease of assembly and also disassembly of the longitudinal equalization piece is achieved.
A form of execution is - created according to the invention by the seat being formed of a fixing bush which surrounds the piston rod and is connected with the stop cap, and on which the longitudinal equalization piece is arranged with initial stress on the inside diameter.
A very simple detachable connection is created - as the invention shows - by the latter being designed. as a snap-on connection. To this end the fixing bush is provided according to a feature with at least one radially outward-pointing projecting part which engages with a matching depression in the longitudinal equalization piece.
A further advantageous form of execution is created by the stop cap being connected with a bearing retainer the outside diameter of which forms the seat and is covered by a dog of the longitudinal equalization piece. According to the invention this dog of the longitudinal equalization piece is formed of locking ars which have locking cams arranged on the free ends.
A further form of execution is distinguished in that the longitudinal equalization piece exhibits in the area of its inside diameter axially extending locking arms which overlap the area formed by the inside diameter of the bearing retainer and form with locking cams the snap-on connection.
The longitudinal equalization piece is with advantage provided with at least three locking arms distributed uniformly over the periphery, on the locking cams of which joining bevels are provided, so that particularly easy and straightforward assembly of the longitudinal equalization piece is made possible simply by
the application of an axial force.
A very cost-effective and easily manufactured longitudinal
equalization piece is obtained if the latter is made of plastic.
This is particularly advantageous if according to the invention
the locking arms exhibit a relatively big axial length and engage
with a groove-shaped depression in the receptacle. Such a form of
execution is particularly suitable for telescopic legs or
vibration absorbers which are rolled-in or partially lock-beaded -for sealing at the top end. With these methods of sealing the
shock absorber it is particularly cost-effective and advantageous if the stop cap and the longitudinal equalization piece form one
unit and are made of a homogeneous material.
The invention will b explained in greater detail below by means
of the forms of execution illustrated in the drawing, where:
Fig. 1 shows a telescopic leg, the stop cap being designed as a
screw cap;
Fig. 2 shows the stop cap with longitudinal equalization piece as
per Fig. 1 on an enlarged scale;
Fig. 3 shows the longitudinal equalization piece which is
connected in the area of the inside diameter with the
bearing retainer by a snap-on connection;
Fig. 4 shows the connection of a longitudinal equalization piece
with a fixing bush of the bearing retainer
Fig. 5 shows a form of execution in which the stop cap and the
longitudinal equalization piece are designed as a single
unit.
The telescopic leg illustrated in Fig. 1 exhibits a receptacle 1 and a piston rod 4 which is conducted flexibly axially by means of a piston rod guide 2 and is sealed externally by a piston rod seal 3. A stop cap 5 is designed as a screw cap and is screwed down onto the receptacle 1 as seal for the telescopic leg. The bearing retainer 6 is connected with the stop cap 5 by projection welding on the front side, so that a gap is formed between
bearing retainer S and stop cap 5 which forms the vent duct for a
hollow rubber spring (not represented).In order to reduce the
stroke of the returning piston rod 4 a longitudinal equalization
piece 7 is provided which overlaps the outside diameter of the
bearing retainer s with several locking arms 8 distributed
uniformly over the periphery and - as shown in Fig. 2 - snaps in
behind the seat formed by the outside diameter of the bearing
retainer 6 by means of locking C7TIS 9. To facilitate fitting of
the longitudinal equafizationpiece 7 on the bearing retainer 6
the bottom ends of the locking arm 8 and locking cams 9 are
provided with a joining bevel 10.The connection of the
longitudinal equalization piece 7 with the bearing retainer 6 and
hence with the stop cap 5 therefore takes place by the imposition
of an axial force, whereby the joining bevel 10 comes to rest
against the outside diameter of the bearing retainer 6, an
increase in diameter of the locking arm 8 is effected, and after the locking cams 9 have crossed the outer surface of the bearing
retainer 6 the fixture is formed by a snap-on connection. The
longitudinal equalization piece 7 is preferably made of plastic,
its axial elongation being adapted to the desired reduction in
the stroke of the piston rod.
In the form of execution according to Fig. 3 a bearing retainer
12 is fixed onto the stop cap 5 by projection welding. A
longitudinal equalization piece 11 possesses in the area of its
inside diameter axially extending locking arms 13 and thus
overlaps the area formed by the inside diameter of the bearing
retainer 12. In keeping with the form of execution according to
Figs 1 and 2, with this arrangement also a snap-on connection is
formed between longitudinal equalization piece 11 and bearing
retainer 12 by locking cams which are arranged on the end of the
locking arm 13.
Fig. 4 shows a further form of execution in which the bearing
retainer 14 is likewise connected with the stop cap 5 by means of
projection welding. In the area of the inside diameter this
bearing retainer 14 exhibits a fixing bush 16 which possesses at
least one radially outward-directed projecting part 15 which when
pressure is exerted on the longitudinal equalization piece 17
engages with a matching depression in this longitudinal
equalization piece 17. The projecting part 16 can for example be formed by a revolving bead, or several partial beadsdistributed uniformly over the periphery are provided1 while the depression in the longitudinal equalization piece 17 is preferably formed by a revolving groove.
In Fig. 5 the longitudinal equalization piece 18 simultaneously forms the stop cap. Such a form of execution is particularly advantageous if the vibration absorber or telescopic leg is sealed by rolling-in or by partial lock-beading of the top end of the cylinder. This longitudinal equalization piece 18 thus on the one hand rests on the top end of the receptacle 1 and on the other forms with the top face the stop for the hollow rubber spring (not represented). The longitudinal equalization piece 18 exhibits several locking arms 19 distributed uniformly over the periphery which have a relatively big axial length and are provided with locking cams 20 which engage with a snap ring groove 21 incorporated in the receptacle 1 and preferably formed by a revolving bead. For the ventilation of the hollow rubber spring the longitudinal equalization piece 18 exhibits vent ducts 22 which run radially outwards.
Fig. 2 shows a rubber spring 25 fixed at the upper and outer end of the piston rod 4. This rubber spring butts against the longitudinal equalization piece 7 on the return travel of the piston rod 4 into the cylinder 26. The air enclosed within the annulus 27 cu thereby be discharged through the axial gap 28 and the radial gap 29.
Various longitudinal equalization pieces 7 can be kept in stock in order to permit adjustment of the free stroke of the piston rod 4 relative to the cylinder 26 without other changes to the shock absorber or the telescopic leg. Similarly it is also possible to stock various longitudinal equalization pieces 11 according to Fig. 3, 17 according to Fig. 4 and 18 according to
Fig. 5.
Claims (13)
1. Telescopic leg or vibration absorber for vehicles, consisting
of a receptacle which at one end has a guide and a seal for a
piston rod and is provided with a front stop cap for limiting
the stroke of the returning piston rod, distinouished in that
the stop cap (5) is designed as a support for a longitudinal
equalization piece (7, 11, 17, 18) extending in an axial
- direction and a seat is provided with which the
longitudinal equalization piece (7, 11, 17, 18) engages.
2. Telescopic leg according to Clairn 1, distinguished in that a
detachable connection is located between stop cap (5) and
longitudinal equalization piece (7, 11, 17, 18).
3. Telescopic leg according to Claims 1 and 2, distinguished in
that the seat is formed by a fixing bush (15) which
surrounds the piston rod () and is connected with a bearing
retainer (14), and on which the longitudinal equalization
piece (17) is arranged with initial stress on the inside
diameter.
4. Telescopic leg according to Claims 1 to 3, distinguished in
that the detachable connection is formed by a snap-on
connection.
5. Telescopic leg according to Claims 1, 2 and 4, distinguished
in that the stop cap (5) is connected with a bearing retainer
(6) the outside diameter of which forms the seat and is
covered by a dog of the longitudinal equalization piece (7).
6. Telescopic leg according to Claims 1, 2, 4 and 5,
distinguished in that the dog of the longitudinal
equalization piece (7) is formed by locking arms (8) which
have locking cams (9) arranged on the free ends.
7. Telescopic leg according to Claims 1, 2 and 4, distinguished
in that the longitudinal equalization piece (11) has in the
area of its inside diameter axially extending locking arms
(13) which overlap the area formed by the inside diameter of
the bearing retainer (12) and form with locking cams the
snap-on connection.
8. Telescopic leg according to Claims 1 to 4, distinguished in
that the fixing bush (15) has at least one radially outward
directed projecting part (16) which engages with a matching
depression in the longitudinal equalization piece (17).
98 Telescopic leg according to Claims 1, 2 and 4 to 7,
distinguished in that the longitudinal equalization piece
(7, 11, 18) has at least three locking arms (8, 13, 19)
distributed uniformly over the periphery, on the locking
cams (9, 20) of which joining bevels (10) are provided.
10. Telescopic leg according to Claims 1 to 9, distinguished in
that the longitudinal equalization piece (7, 11, 17, 18) is
made of plastic.
11. Telescopic leg according to Claims 1, 2 and 4, distinguished.
in that the locking arms (19) have a relatively big axial
length and engage with a groove-shaped depression (snap ring
groove 21) in the receptacle (1), said depression forming
the seat.
12. Telescopic leg according to Claims 1, 2, 4 and 11,
distinguished in that the stop cap and the longitudinal
equalization piece (18) form one unit and are made of a
homegeneous material.
13. Telescopic leg or vibration absorber for vehicles
substantially as described with reference to Figures 1
and 2, Figure 3, Figure 4 or Figure 5 of the accompanying
drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8701435U DE8701435U1 (en) | 1987-01-30 | 1987-01-30 | Suspension strut or vibration damper for vehicles |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8801567D0 GB8801567D0 (en) | 1988-02-24 |
| GB2200717A true GB2200717A (en) | 1988-08-10 |
| GB2200717B GB2200717B (en) | 1991-01-02 |
Family
ID=6804156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8801567A Expired - Fee Related GB2200717B (en) | 1987-01-30 | 1988-01-25 | Cylinder piston device for vehicles |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE8701435U1 (en) |
| GB (1) | GB2200717B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257730A (en) * | 1991-07-19 | 1993-11-02 | Tokai Rubber Industries, Ltd. | Bound stopper for vehicle suspension having rubber and foam elastic bodies |
| US5636831A (en) * | 1994-04-29 | 1997-06-10 | Fichtel & Sachs Ag | Shock absorber and pneumatic spring assembly |
| CN100510461C (en) * | 2006-08-11 | 2009-07-08 | 萱场工业株式会社 | Check valve structure of hydraulic dumper |
| CN103234000A (en) * | 2013-05-14 | 2013-08-07 | 长沙理工大学 | Leakage-proof method of shaft extension holding chamber sliding ring segregation of horizontal type damper |
| CN103234001A (en) * | 2013-05-14 | 2013-08-07 | 长沙理工大学 | Leakage-proof method of shaft extension holding chamber check valve segregation of horizontal type damper |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009016210A1 (en) * | 2009-04-03 | 2010-10-14 | Volkswagen Ag | Vibration damper e.g. twin-tube vibration damper, for use in motor vehicle, has protective cap attached to container tube, and insert body provided for axial length adjustment between container tube and protective cap and arranged in cap |
| DE102013214599A1 (en) * | 2013-07-25 | 2015-01-29 | Bayerische Motoren Werke Aktiengesellschaft | Vibration damper with a pressure stop cap |
| US9186948B2 (en) | 2013-12-06 | 2015-11-17 | GM Global Technology Operations LLC | Systems and methods for damper having an insert |
| DE102015216075A1 (en) * | 2015-08-24 | 2017-03-02 | Volkswagen Aktiengesellschaft | Shock absorber for a motor vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB906550A (en) * | 1959-01-29 | 1962-09-26 | Renault | Improvements in or relating to shock absorbers |
| GB1281889A (en) * | 1968-09-19 | 1972-07-19 | Armstrong Patents Co Ltd | Improvements in and relating to telescopic shock absorbers and struts |
-
1987
- 1987-01-30 DE DE8701435U patent/DE8701435U1/en not_active Expired
-
1988
- 1988-01-25 GB GB8801567A patent/GB2200717B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB906550A (en) * | 1959-01-29 | 1962-09-26 | Renault | Improvements in or relating to shock absorbers |
| GB1281889A (en) * | 1968-09-19 | 1972-07-19 | Armstrong Patents Co Ltd | Improvements in and relating to telescopic shock absorbers and struts |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257730A (en) * | 1991-07-19 | 1993-11-02 | Tokai Rubber Industries, Ltd. | Bound stopper for vehicle suspension having rubber and foam elastic bodies |
| US5636831A (en) * | 1994-04-29 | 1997-06-10 | Fichtel & Sachs Ag | Shock absorber and pneumatic spring assembly |
| CN100510461C (en) * | 2006-08-11 | 2009-07-08 | 萱场工业株式会社 | Check valve structure of hydraulic dumper |
| CN103234000A (en) * | 2013-05-14 | 2013-08-07 | 长沙理工大学 | Leakage-proof method of shaft extension holding chamber sliding ring segregation of horizontal type damper |
| CN103234001A (en) * | 2013-05-14 | 2013-08-07 | 长沙理工大学 | Leakage-proof method of shaft extension holding chamber check valve segregation of horizontal type damper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2200717B (en) | 1991-01-02 |
| GB8801567D0 (en) | 1988-02-24 |
| DE8701435U1 (en) | 1987-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19970125 |