CN108139011B

CN108139011B - Damping device in a hydraulic path

Info

Publication number: CN108139011B
Application number: CN201680056542.8A
Authority: CN
Inventors: G·布雷特; J·迪尔
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2015-10-30
Filing date: 2016-09-22
Publication date: 2020-05-05
Anticipated expiration: 2036-09-22
Also published as: CN108139011A; DE102016218191A1; WO2017071701A1; DE112016004989A5

Abstract

The invention relates to a damping device in a hydraulic path, in particular for clutch actuation of a motor vehicle, having a first housing part (2) and a second housing part (1) extending axially relative thereto, wherein the first housing part (2) can be inserted into the second housing part (1). The first housing part (2) is fitted into the second housing part (1) in a manner such that it can be rotated within a defined range, wherein the first housing part (2) and the second housing part (1) can be mechanically connected to one another by means of a rotational connection.

Description

Damping device in a hydraulic path

Technical Field

The present invention relates to a damping device in a hydraulic path, in particular for clutch actuation of a motor vehicle, and the invention is in particular for a coaxial damper.

Background

In document DE 102010052390 a1, there is a coaxial damper consisting of three parts: a housing/storage and a cover, into which the press-in part is pressed on the end side. These three sections have a central through hole through which fluid flows from the slave cylinder to the master cylinder or in the opposite direction, depending on the coupling process. The housing has an annular chamber which is closed at the end by a sleeve-like press-in part (including the groove present therein). Such an axial groove is arranged in the outer circumference of the press-in part, which abuts against the inner wall of the housing, and forms the supply line to the annular chamber of the housing. The press-in part also has a radial opening, which is connected to the central, axial through-hole. By means of this embodiment of the pressure element, a small amount of fluid is always flushed up to the highest position of the damper. The damping of vibrations within a defined bandwidth is achieved by the groove and the ring chamber lying thereon. In order to ensure that the supply line for the ring chamber is always located above and thus ensures ventilation, corresponding flats are provided on the press-in part and on the housing, which flats serve as twist stops. In this case, the cross section of the axial groove for the fluid supply into the ring chamber is adjusted accordingly as a function of the desired damping frequency. In this case, a chamber through which a fluid can flow is formed in the connecting region of the housing and the conically or hemispherically shaped cover or between the inner wall of the cover and the pressure piece. The cover is usually connected to the housing by means of welding.

DE 102013200177 discloses a vibration damping device in the hydraulic path, wherein, for damping/damping undesired pressure oscillations, a damper is provided which is arranged coaxially with respect to a pressure line hydraulically connecting a master cylinder and a slave cylinder to one another and has a housing arranged around a central through opening, which is connected to a cover having a through opening. An annular chamber is provided in the housing, which is closed by a press-in part arranged in the region of the connection of the housing and the cover. In order to ensure the position of the cover relative to the housing, the welding process is oriented accordingly during production and the cover and the housing are therefore welded to one another.

The welding of the cover and the casing has some drawbacks: for example, one disadvantage is that the same material must always be used for the cover and the housing; and additional processing steps up to functional testing. Likewise, the parts must be dried prior to welding.

Disclosure of Invention

The object of the present invention is to develop a damping device in the hydraulic path, which at the same time has a structurally simple construction with reduced production time.

The invention relates to a damping device in a hydraulic path, in particular for clutch actuation of a motor vehicle. The vibration damping device has a housing arranged around a central through-opening, which is connected to a cover, which extends in the axial direction and also has a throughflow opening. The cover is fitted into the housing in such a manner as to be rotatable within a limited range, so that the housing and the cover can be mechanically connected to each other. Advantageously, only 1/4 turns are required in order to interconnect the housing and cover. The connection is designed, for example, in the form of a bayonet-type closure connection. In this connection, it is advantageous to dispense with the welding method with expensive welding robots and shorter production cycles during production.

In order to avoid an undesired pivoting back of the cover and the housing and thus an undesired loosening of the connection between the cover and the housing, a securing element is used which prevents a reverse rotation of the component. In particular, a wire spring (Drahtformfeder) is used as a securing element, which protects the cover and the housing against torsion, wherein the cover has a receptacle corresponding to the securing element and the housing has a projection corresponding to the securing element on its end side in the direction of the cover.

An annular chamber is provided in the housing, which is closed by means of the cover. For this purpose, the cover has a sealing device which seals the annular chamber. A damping unit is located in the annular cavity and is inserted into the housing before the cap is twisted with the housing.

A further advantage of the connection produced by means of the 1/4 transformation is the following feasibility: a cover and a housing made of the same or different materials can be combined. This is not possible in the soldering method.

Furthermore, assembly time is reduced because neither drying of the housing and cover nor cooling of the damping device prior to product testing is necessary.

By means of the rotary connection according to the invention between the cover and the housing, a more compact damping device can be produced with the same length.

Drawings

The invention is explained in more detail below on the basis of exemplary embodiments and associated figures, without being restricted thereto.

Shown here are:

figure 1 is an exploded view of a vibration damping device,

figure 2 shows the damping device in an assembled state,

fig. 3 is a cross-sectional view of a vibration damping device.

Detailed Description

Fig. 1 shows the individual components of the vibration damping device in an exploded view. The vibration damping device has a housing 1 with a central through-opening 1.1, which is connected by means of a rotary connection to a cover 2, which likewise has a central throughflow opening 2.1. The cover 2 is located in the axial direction with respect to the housing 1. During assembly, the cover 2 is rotated into the housing 1 by means of 1/4 and is axially fixed. The housing 1 has a projection 1.1 on the housing edge in the direction of the cover 2. On the cover 2 there is a receiving portion 2.1 corresponding to the projection 1.2. The projection 1.2 of the housing and the receptacle 2.1 of the cover 2 are connected to each other by means of a securing element 3 in the form of a wire-shaped spring, whereby the above-mentioned parts are prevented from rotating relative to each other.

The damping unit 4 is located in the housing 1, said damping unit being inserted into the housing 1 before closing the system. The cover 2 has a sealing device 5 which seals the vibration damper with the vibration damper unit 4 located inside.

Fig. 2 shows the assembled cover 2 on the housing 1. After the rotational connection of the components, a securing element in the form of a wire-shaped spring 3 slides over the housing 1 and the cover 2. After the cover 2 is mounted, the projection 1.1 of the housing 1 is flush with the receptacle 2.1 of the cover 2 for the securing element 3.

The damping device, which is completely assembled and protected against displacement and torsion, is shown in section in fig. 3. The housing 1 and the cover 2 are connected to one another by means of a bayonet closure connection and are protected against opening by a securing element 3. The housing 1 forms an annular chamber 1.3 in its interior, into which the damping unit 4 is fitted. The annular chamber 1.3 is sealed by means of a cover 2 having a sealing device 5 located thereon. The fluid flowing through only flows through the through-opening 1.1 of the housing 1 and the through-opening 2.1 of the cover 2. The flow rate is set or regulated by the damping unit 4.

The vibration damping device described in the exemplary embodiments described above allows simple and cost-effective production, since the welding process for connecting the cover and the housing and the tools necessary for this process can be dispensed with. The cover and the housing can also be produced from different materials, whereby suitable materials can be used for the respective purpose of use. After assembly, cooling of the damping device before product testing is eliminated, since no heat is introduced into the material as a result of welding.

List of reference numerals

1 casing

1.1 through-hole

1.2 raised portions

1.3 Ring Chamber

2 cover

2.1 flow-through hole

2.2 receiving part

3 safety element

4 damping unit

5 sealing device

Claims

1. A damping device in a hydraulic path, having a housing (1) arranged around a central through hole (1.1), which is connected with a cover (2) which extends in an axial direction and also has a through-flow hole (2.1), characterized in that the cover (2) is fitted into the housing (1) in such a way that it can rotate within a defined range, such that the housing (1) and the cover (2) can be mechanically connected to each other;

an annular chamber (1.3) is provided in the housing (1), and a damping unit (4) is pressed into the annular chamber (1.3), wherein the flow rate of the fluid flowing through is adjusted only by means of the damping unit (4);

the connection between the cover (2) and the housing (1) is fixed by means of a securing element (3), the cover (2) having a receptacle (2.2) corresponding to the securing element (3), and the housing (1) having a projection (1.2) corresponding to the securing element (3) on the end side of the housing facing the cover (2) in order to prevent an undesired pivoting back.

2. Damping device according to claim 1, characterized in that the housing (1) and the cover (2) can be connected relative to each other by means of a quarter turn.

3. The vibration damping device according to claim 1, characterized in that the connection between the cover (2) and the housing (1) is configured in the form of a bayonet-type closure connection.

4. Damping device according to claim 1, characterized in that the securing element (3) is constructed in the form of a wire-shaped spring.

5. Damping device according to any of claims 1 to 4, characterized in that the cover (2) has a sealing device (5) which seals the annular chamber (1.3).

6. Damping device according to any of claims 1 to 4, characterized in that the cover (2) and the housing (1) consist of the same or different materials.

7. The vibration damping device according to claim 1, wherein the hydraulic path is used for clutch operation of a motor vehicle.