DE19932583B4 - Hydraulically damping bearing - Google Patents

Abstract

Hydraulically damping bearing (1) with a first anchoring part (2) and a second anchoring part (3) movable relative to the first anchoring part (2), with a spring element (6) acting between the first and the second anchoring part (2, 3), with a working space (10) filled with damping liquid and a compensation space (11) connected to the working space (10) in a liquid-conducting manner and connected to the working space (10) via a damping channel (14) which is bounded by a channel wall and runs in the circumferential direction, the volume of the working space (10) upon a relative movement of the first and second anchoring part (2, 3), so that damping fluid is moved in the damping channel (14) between the compensating chamber (11) and the working chamber (10), a partition wall (12) loaded with damping fluid being provided which separates the working space (10) from the compensation space (11) and which is mounted on a support body (13) and with a displacer (16) arranged on the first anchoring part (2), which extends into the working space (10) and which is connected to the first ...

Description

The invention relates accordingly the preamble of claim 1 is a hydraulically damping Bearing with a first anchoring part and one relative to that first anchoring part movable second anchoring part, with one acting between the first and the second anchoring part Spring element, with one with damping fluid filled Work space and one separated from it and one by a channel wall limited, circumferential damping channel liquid-conducting compensation room connected to the work space, the volume of the work area with a relative movement of the first and second Anchoring part changed is so that damping fluid in the damping channel is moved between the compensation room and the work space, wherein one with damping fluid acted partition is provided that the workspace of separates the compensation space and which is mounted on a support body and with a displacer arranged on the first anchoring part, the extends into the work area and that with the first anchoring part is movable relative to the second anchoring part.

From the DE 196 20 971 A1 describes a hydraulically damping bearing with two anchoring parts movable relative to each other, between which a spring element acts. Furthermore, the bearing has a working space filled with damping fluid and a compensation space connected to it via a damping channel. Such a bearing can reduce low-frequency vibrations due to resonance reactions of the damping fluid in the damping channel. It is desirable that the damping channel is as long as possible in order to increase the mass of the fluid moving in the damping channel. A long damping channel leads from the DE 196 20 971 A1 known solution to a large height of the hydraulic bearing. However, this is disadvantageous if the installation space, for example in an engine compartment, is limited.

A comparable engine mount is from the EP 0 523 896 A1 known. In this bearing, the channel extends in the circumferential direction and is formed in the support body. Another channel is formed in the displacer.

This extends between the Work room and an auxiliary room. Both of the above channels are separate channels.

Even with that from the DE 69106858 T2 known bearing, a channel is formed in the support body, which connects the working space with the compensation space. Furthermore, this bearing has an annular, narrowed passage for the liquid, which should make it possible to use a second “column effect” for the purpose of damping and filtering. In this case, it should be possible to use the second column effect to achieve a second frequency value of the vibration to be filtered and damped adjust.

The invention is based on the object hydraulically damping Develop camp such that a long damping channel with a low overall height of the camp is achieved.

This task is done by a warehouse solved with the features of claim 1.

Because of the design according to the invention causes the displacer an extension of the damping channel, without this the height of the Warehouse would be enlarged. The displacement can be designed so that it is in the sprung state no channel extension and in the partially sprung or fully sprung state of the bearing the channel extension causes. In the extended damping channel is a relatively large one Amount of damping fluid added what is the effectiveness of this vibration damping elevated.

The vibration isolating properties of the Bearings are also further improved in that the damping fluid acted partition is provided that the workspace of separates the compensation room. The partition can be particularly flexible Membrane be formed.

According to an advantageous development the invention provides that the displacer is designed as a stop which is the movement between the first and second anchoring part limited.

A particularly long damping channel is achieved in that the Channel wall of the damping channel in sections by one arranged on the second anchoring part Support body formed becomes. In this way, a long damping channel can be formed whose channel wall in a first section through the support body and in a second section by the displacer, if necessary together with the support body becomes.

According to an advantageous training the invention provides that the displacer in the partially sprung Condition of the bearing with a first contact section, the first Forms section of the channel wall on which the second support body rests. This ensures that e.g. an extension if the bearing is loaded by the displacer of the damping channel is effected while this is not the case when the bearing is relieved.

According to a further development of this inven The idea is that when the first anchoring part moves relative to the second anchoring part, the first contact section is elastically deformed in contact with the support body. As a result, a relative movement of the first and second anchoring part is not or only insignificantly impeded.

It has proven to be advantageous that itself the first contact section in the axial direction of the bearing second support body extends. As a result, the second plant section forms one aligned substantially parallel to the axial direction of the bearing Channel wall.

According to an advantageous embodiment the invention provides that the displacer is in the circumferential direction of the bearing extending second contact section, which has a forms the second section of the channel wall and on the second anchoring part is applied.

Here is the second plant section designed to be flexible, in particular transverse movements of the first To allow anchoring part to the second anchoring part.

The manufacture of the hydraulic bearing simplified by the fact that with the second anchoring part in the area of the system of the second system section a sealing cover layer, in particular made of elastomer is.

This will further improve achieved that in a channel outlet is formed in the first contact section the damping channel with connects the work space.

The strength of the displacer is improved by the fact that displacement has a support body embedded in the elastomer.

The manufacturing costs can thereby be lowered that the displacement one piece is trained.

Another improvement in vibration isolation can be achieved in that the displacer in the work area to the spring body adjacent liquid channel divides. The one in the liquid channel absorbed damping channel forms together with that as a flat spring acting spring body an oscillatory system. This can be coordinated in such a way that a vibration damping certain frequency.

According to a training this The idea of the invention provides that the liquid channel has a in the displacer trained opening connected to the working chamber in a liquid-conducting manner is. Such an opening affected the resonance frequency of those recorded in the liquid channel Damping fluid. The opening also by extending in the radial direction of the bearing second contact section of the displacer formed closable become. In this case itself when exceeded a certain pressure difference between the damping channel and the liquid channel the second section of the system releases the otherwise closed opening.

It is advantageously provided that that a connection between the liquid space and the work space through a recess which is in the second System section is provided, and produced by the channel outlet is, the channel exit and the recess in particular adjacent are arranged to each other.

In this case there is a long damping channel achieved in that the Partition from the damping channel is radially enclosed at least in sections.

The subject of the invention is further illustrated below with the aid of the drawing.

1 shows a cross section through an inventive bearing.

2 shows a cross section through an inventive bearing according to another embodiment.

Execution of the invention

In 1 is a hydraulic damping bearing 1 with a first anchoring part 2 and one relative to the first anchoring part 2 movable second anchoring part 3 shown. About the metal first and second anchoring parts 2 . 3 For example, the bearing can be connected on the one hand to the motor and on the other hand to the chassis (not shown), with attachment via the holes 4 and 5 he follows.

Between the first and second anchoring part 2 . 3 is a spring element 6 provided which is designed as a rubber body. The ring-shaped rubber body has essentially the shape of a truncated cone, the outer end in the radial direction with the second anchoring part 3 the inner end in the radial direction with the first anchoring part 2 connected is. The spring element 6 by vulcanizing with the first and second anchoring parts 2 . 3 be connected. In which the spring element 6 forming rubber body is a support ring 7 added, which divides the rubber body into a radially inner and a radially outer section.

The second anchoring part 3 has a housing section 8th on the the bearing axis 9 encloses in a ring. At the end of the housing section facing the first anchoring part 8th is the spring element 6 established.

In the through the housing section 8th bounded space is a work space 10 and an equalization room 11 educated. The work area is separated from the compensation area by a partition 12 attached to a support body 13 is stored separately. Here are the work space and the compensation room filled with damping fluid and via a damping channel 14 connected to each other in a liquid-conducting manner.

The work space 10 is through the first anchoring part 2 , the spring element 6 , the housing section 8th who have favourited Partition Wall 12 and the support body 13 limited. The compensation room 11 is through the the work space 10 opposite side of the partition 12 and the support body 13 as well as an elastic membrane designed as a bellows 15 limited.

On the first anchoring part 2 is in the work room 10 extending displacer 16 arranged in the damping fluid. The displacer 16 is together with the anchoring part 2 relative to the second anchoring part 3 movable.

With a relative movement between the first anchoring part 2 and second anchoring part 3 becomes the volume of the working space completely filled with damping fluid 10 changed so that damping fluid through the damping channel 14 between the work space 10 and the compensation room 11 is moved. The elastic membrane 15 allows that in the compensation room 11 a variable volume of the damping fluid is absorbed. When vibrations are introduced into the bearing 1 , A vibration reduction is achieved in that in the damping channel 14 absorbed damping liquid is also vibrated when the natural frequency of the damping liquid in the damping channel 14 is excited. It is advantageous if the mass of the in the liquid channel 14 moving damping fluid is as large as possible. This can be achieved through a particularly long damping channel 14 can be achieved.

The damping channel 14 therefore has a first section 17 and a second section 18 on which is the first section 17 extended.

The first paragraph 17 of the damping channel 14 is in the support body 13 formed and extends in the circumferential direction outside around the partition 12 around. The first section of the damping channel is on the one hand through the support body 13 and on the other hand through the housing section 8th of the second anchoring part 3 limited. The first section of the canal 17 is via a first channel opening 19 to the compensation room 11 back and over a second channel opening 20 to the work room 10 respectively. to the second section of the canal 18 open towards.

The second section of the canal 18 extends like the first channel section 17 in the circumferential direction in a ring along the housing section 8th , He is on the one hand by the on the first anchoring part 2 fixed displacer 16 and on the other hand by the on the second anchoring part 3 fixed support body 13 as well as the housing section 8th limited. The second section of the canal 18 is through the second channel opening 20 to the first section of the canal 17 and through the third channel opening 21 to the work room 10 open towards.

In the unloaded, spring-loaded condition of the bearing 1 which in the left half of the picture 1 is shown, the displacer 16 not on the support body 13 on. In this case there is the damping channel 14 only from the first channel section 17 ,

When the bearing is loaded and partially compressed 1 lies the displacer 16 with a first plant section 22 on the support body 13 and a second plant section 23 on the housing section 8th on. First and second investment sections 22 . 23 thus form together with the support body 13 and the housing section 8th the channel wall of the damping channel 14 in the second channel section 18 ,

The first and second investment sections 22 . 23 are designed to be flexible and, on the one hand, enable a relative movement of the first and second anchoring parts 2 . 3 along and across the bearing axis 9 , The first investment section 22 is on the body of the displacer 16 trained and extends in the direction of the bearing axis 9 to the second support body 3 out. The first investment section 22 is arranged so that it is in the region of the radially outer end of the partition 12 on the support body 13 comes to the plant.

The second investment section 23 extends in the radial direction of the bearing, ie transverse to the bearing axis 9 , It has a corrugated cross section to increase flexibility. At the radially outer end, the second contact section has the shape of a tapered contact lip. The housing section 8th has a top layer on its inner wall 24 on which the second system section 23 fits tightly.

The displacer 16 consists essentially of elastomer 25 and has a support body element embedded in it 26 made of metal. The first and second investment sections 22 and 23 are integral with the body of the displacer 16 made of elastomer 25 educated. The displacer 16 is about a spigot 27 on the first anchor file 2 attached.

The displacer 16 divides in the work space 10 one to the spring element 6 adjacent liquid channel 28 from. Here are those of the bearing axis 9 facing side of the spring element 6 and the spring element 6 facing side of the displacer 16 formed essentially parallel. The fluid channel 28 can have an opening 29 with the rest of the work space 10 be connected. In the illustrated embodiment, the opening is 29 through the second plant section 23 of the displacer 16 locked. However, since this is flexible, the opening 29 released as soon as there is a significant pressure difference between the second section 18 of the damping channel 14 and the fluid channel 28 builds. However, such an opening could also be in the Ver oppressor 16 be trained (not shown).

The the work space 10 from the compensation room 11 separating partition 12 is designed as an elastic membrane. It is loaded with damping fluid on both sides. The partition 12 is done by holding sections 30 of the support body 13 held in place.

The displacer 16 is also designed as a stop, which the movement between the first and second anchoring part 2 . 3 limited. In its lower position, the displacer lies on the support body 13 on, the elastically formed first contact section 22 is bent outwards in the radial direction.

This in 2 shown hydraulic damping bearings 1 largely corresponds to that in 1 illustrated embodiment. The same reference numbers are therefore used for matching parts. At the in 2 shown hydraulic damping bearings 1 is in the second plant section 23 a recess 31 provided which is adjacent to the channel exit 21 is arranged. This creates a connection between the liquid space 28 and the work space 10 ,

Claims (16)

Hydraulic damping bearing ( 1 ) with a first anchoring part ( 2 ) and one relative to the first anchoring part ( 2 ) movable second anchoring part ( 3 ), with a between the first and the second anchoring part ( 2 . 3 ) acting spring element ( 6 ), with a working area filled with damping fluid ( 10 ) and a damping channel separated from the latter and via a circumferential damping channel delimited by a channel wall ( 14 ) liquid-conducting with the work area ( 10 ) connected compensation room ( 11 ), the volume of the work space ( 10 ) with a relative movement of the first and second anchoring part ( 2 . 3 ) is changed so that damping fluid in the damping channel ( 14 ) between the compensation room ( 11 ) and the work area ( 10 ) is moved, with a partition wall loaded with damping fluid ( 12 ) is provided, which 10 ) from the compensation room ( 11 ) separates and attached to a support body ( 13 ) is mounted and with one on the first anchoring part ( 2 ) arranged displacer ( 16 ), which is in the work area ( 10 ) extends and that with the first anchoring part ( 2 ) relative to the second anchoring part ( 3 ) is movable, characterized in that the damping channel ( 14 ) a first and a second circumferentially extending channel section ( 17 . 18 ), the first section ( 17 ) of the damping channel ( 14 ) in the support body ( 13 ) is formed and in the loaded, partially spring-loaded state of the bearing by the displacer (at least in sections) ( 16 ) limited second channel section ( 18 ) is extended. Bearing according to claim 1, characterized in that the displacer ( 16 ) is designed as a stop which prevents the movement between the first and second anchoring part ( 2 . 3 ) limited. Bearing according to claim 1 or 2, characterized in that the channel wall of the damping channel ( 14 . 17 . 18 ) section by section on the second anchoring part ( 3 ) arranged support body ( 13 ) is formed. Bearing according to one of claims 1 to 3, characterized in that the displacer ( 16 ) in the partially sprung condition of the bearing ( 1 ) with a first plant section ( 22 ), which forms a first section of the channel wall, on the support body ( 13 ) is present. Bearing according to claim 4, characterized in that during the relative movement of the first anchoring part ( 2 ) to the second anchoring part ( 3 ) the displacer ( 16 ) on the support body ( 13 ) is resiliently deformed. Bearing according to claim 4 or 5, characterized in that the first contact section ( 22 ) in the axial direction of the bearing ( 1 ) to the support body ( 13 ) extends. Bearing according to one of claims 1 to 6, characterized in that the displacer ( 16 ) one in the radial direction of the bearing ( 1 ) extending second contact section ( 23 ) which forms a second section of the channel wall and on the second anchoring part ( 3 ) is present. Bearing according to claim 7, characterized in that the second contact section ( 23 ) is flexible. Bearing according to claim 7 or 8, characterized in that the second anchoring part ( 3 ) in the area of the plant of the second plant section ( 23 ) with a sealing top layer ( 24 ) is coated in particular from elastomer. Bearing according to one of claims 4 to 9, characterized in that in the first contact section ( 22 ) a channel exit ( 21 ) is formed, which the damping channel ( 14 . 17 . 18 ) with the work space ( 10 ) connects. Bearing according to one of claims 1 to 10, characterized in that the displacer ( 16 ) a support body embedded in elastomer ( 26 ) having. Bearing according to one of claims 1 to 11, characterized in that the displacer ( 16 ) is formed in one piece. Bearing according to one of claims 1 to 12, characterized in that the displacer ( 16 ) in the work room ( 10 ) one to the spring element ( 6 ) adjacent liquid space ( 28 ) departments. Bearing according to claim 13, characterized in that the liquid space ( 28 ) over one in the displacer ( 16 ) trained opening ( 29 ) with the rest of the work area ( 10 ) is connected to conduct liquid. Bearing according to one of claims 1 to 13, characterized in that a connection between the liquid space ( 28 ) and the work area ( 10 ) through a recess ( 31 ), which in the second system section ( 23 ) is provided, and through the channel outlet ( 21 ) is produced, with the channel outlet ( 21 ) and the recess ( 31 ) are in particular arranged adjacent to one another. Bearing according to one of claims 1 to 15, characterized in that the partition ( 12 ) from the damping channel ( 14 . 17 . 18 ) is radially enclosed at least in sections.