CN110220020B

CN110220020B - Diaphragm for flow valve

Info

Publication number: CN110220020B
Application number: CN201910143070.5A
Authority: CN
Inventors: E·迈特斯
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2018-03-01
Filing date: 2019-02-26
Publication date: 2022-02-15
Anticipated expiration: 2039-02-26
Also published as: CN110220020A; DE102018203032A1

Abstract

The invention relates to a diaphragm (1) for a flow valve, comprising a disk-shaped base body (2) made of a soft elastic material, wherein means (5) for preventing sticking are arranged on both sides of the disk-shaped base body (2), wherein the means (5) for preventing sticking are embodied at least on a first side of the base body (2) as ribs (7A, 7B) arranged at the outer edge, and to a corresponding flow valve comprising such a diaphragm (1).

Description

Diaphragm for flow valve

Technical Field

The invention relates to a diaphragm for a flow valve of the type according to independent claim 1. The invention also relates to a corresponding flow valve having such a diaphragm.

Background

Diaphragms installed, for example, in check valves or flow valves are known from the prior art. Such a check valve is installed, for example, between the vacuum pump and the brake booster and serves to establish a negative pressure in the brake booster and to maintain a vacuum therein. The diaphragm is typically constructed of a soft elastomeric material to close and release the valve's sealing profile. The state of delivery of the film web to the production line is usually realized as a discrete piece. For the purpose of further processing, measures are provided which prevent the films from adhering to one another. Thus, for example, an additional plasma treatment of the membrane can be performed, which reduces the sticking tendency of the membrane. However, the anti-sticking effect of the membrane may gradually deteriorate over time.

Disclosure of Invention

The diaphragm for a flow valve having the features of the independent claim 1 has the advantage that the geometry of the diaphragm is changed such that the tendency of the individual diaphragms to stick is reduced without plasma treatment. The new geometry of the diaphragms advantageously prevents the diaphragms from coming into contact with one another over a large area. This eliminates the need for plasma treatment of the membrane and allows the membrane to be processed permanently without problems.

Embodiments of the invention provide a diaphragm for a flow valve, having a disk-shaped base body made of a soft, elastic material, wherein means for preventing sticking are arranged on both sides of the disk-shaped base body. The means for preventing sticking are embodied here at least on the first side of the base body as ribs arranged at the outer edge.

A flow valve is also presented that releases fluid flow in a first direction and shuts off fluid flow in an opposite second direction. The flow valve is embodied as a diaphragm insert having such a diaphragm and a diaphragm receptacle, into which the flow valve can be introduced.

The flow valve can be fitted, for example, into a corresponding receiving opening of the brake booster, so that the vacuum pump can generate a negative pressure in the brake booster via the flow valve. In this case, the flow valve blocks the negative pressure generated in the brake booster.

The diaphragm for a flow valve specified in independent claim 1 and the flow valve specified in independent claim 1 can be advantageously improved by the measures and refinements mentioned in the dependent claims.

It is particularly advantageous if at least one rib can be embodied circumferentially or with interruptions.

In an advantageous embodiment of the membrane, the disk-shaped base body of the membrane can have a central opening, through which the membrane can be simply and quickly mounted on the stud-shaped membrane carrier.

In a further advantageous embodiment of the membrane, the means for preventing sticking can be embodied on both sides of the base body as ribs arranged at the outer edge. Alternatively, the means for avoiding sticking are embodied as a centrally arranged cap on the second side of the base body. The membrane can be fixed in the corresponding receiving opening or can be inserted onto the receiving stud by means of the cap.

In an advantageous embodiment of the flow valve, the diaphragm receptacle can have a sealing geometry with at least one through-opening. The disk-shaped base body of the membrane can be inserted through the central opening onto the receiving stud of the membrane holder.

In a further advantageous embodiment of the flow valve, the diaphragm can be in a sealing geometry and completely covers the at least one through-opening in the shut-off state, and the at least one through-opening is at least partially released in the released state. The flow valve therefore allows air to be drawn off from the brake booster via the at least one through opening and the vacuum generated in the brake booster is kept as long as possible.

In a further advantageous embodiment of the flow valve, a sealing element in the receiving groove can be arranged between the diaphragm insert and the wall of the receiving opening, which sealing element makes it possible for the diaphragm insert to seal against the wall of the receiving opening. The sealing element can be embodied, for example, as an O-ring, which can be guided in the receiving groove. In this case, the receiving slot can be completely introduced into the diaphragm insert. Alternatively, the receiving slot can be formed in part by the membrane insert and in part by a wall of the receiving opening.

Drawings

Embodiments of the invention are illustrated in the drawings and are described in more detail in the following description. In the drawings, like reference numbers indicate functionally identical or similar parts or elements. Wherein:

FIG. 1 shows a schematic perspective illustration of a first embodiment of a diaphragm for a flow valve according to the present invention.

FIG. 2 shows a cross-sectional illustration of the diaphragm for a flow valve according to the invention of FIG. 1.

FIG. 3 shows a schematic perspective top view of a second embodiment of a diaphragm for a flow valve according to the present invention.

FIG. 4 shows a schematic perspective bottom view of the diaphragm for a flow valve of FIG. 3 according to the present invention.

Fig. 5 shows a schematic exploded perspective illustration of an embodiment of a flow valve according to the invention with the diaphragm according to the invention for a flow valve of fig. 1 and 2.

Detailed Description

As can be seen from fig. 1 to 5, in the exemplary embodiment shown, the flow valve 10, which releases a fluid flow in a first direction and blocks a fluid flow in a second, opposite direction, is embodied as a diaphragm insert 12 and comprises the

diaphragms

1, 1A and a diaphragm receptacle 14. The flow valve 10 embodied as a diaphragm insert 12 can be introduced, for example, into a receiving opening of the brake booster, so that a negative pressure in the brake booster can be generated and maintained by the flow valve 10 and a vacuum pump, not shown.

As can be further seen from fig. 1 to 5, the illustrated exemplary embodiment of the membrane 1, lA for a flow valve 10 according to the invention comprises a disk-shaped base body 2, which is made of a soft, elastic material. On both sides of the disk-shaped base body 2 means 5 are arranged for avoiding sticking. The means 5 for preventing sticking are embodied here at least on the first side of the base body 2 as ribs 7A, 7B arranged at the outer edge.

In the illustrated exemplary embodiment of the

membrane

1, 1A according to the invention, at least one rib 7A, 7B is embodied in a circumferential manner. In an alternative embodiment of the membrane, not shown, at least one rib 7A, 7B can be implemented with an interruption.

As can be seen further from fig. 1 to 5, the disk-shaped base body 2 of the membrane 14 has a central opening 3, through which the

membrane

1, 1A can be fixed to the membrane holder 14.

As can be seen further from fig. 1, 2 and 5, in the illustrated first exemplary embodiment of the membrane 1, the means 5 for preventing adhesion are embodied on both sides of the base body 2 as ribs 7A, 7B arranged at the outer edges.

As can be seen further from fig. 3 and 4, in the illustrated second exemplary embodiment of the membrane 1A, the means 5 for preventing sticking are embodied on the first side of the base body 2 as ribs 7A arranged at the outer edge. The means 5 for avoiding sticking are embodied as a centrally arranged cap 7C on the second side of the base body 2.

As can be seen further from fig. 5, in the illustrated exemplary embodiment of the flow valve 10, the diaphragm receptacle 14 has a sealing geometry 14.1 with a plurality of through openings 14.3. In the exemplary embodiment shown, the disk-shaped base body 2 of the first exemplary embodiment of a membrane 1 according to the invention is inserted through the central opening 3 onto the receiving stud 14.2 of the membrane holder 14. If the second embodiment of the diaphragm 1A shown in fig. 3 and 4 is used in the flow valve 10, the central cap 7C is now inserted through the central opening onto the receiving stud 14.2 of the diaphragm receptacle 14. After insertion, the

membrane

1, 1A is on the sealing geometry 14.1. In the closed state, the base body 2 of the

membrane

1, 1A completely covers the at least one through-opening 14.3. In the released state, the base body 2 of the

membrane

1, 1A at least partially releases the at least one through-opening 14.3.

Between the membrane insert 12 and the wall of the receiving opening, a sealing element 18 can be arranged in the receiving slot 16, which sealing element seals the membrane insert 12 against the wall of the receiving opening. In the illustrated exemplary embodiment of the flow valve 10, the sealing element 18 is embodied, for example, as an O-ring, which is guided in the receiving groove 16. In the exemplary embodiment shown, the receiving slot 16 is completely introduced into the diaphragm insert 12. In an alternative embodiment, which is not shown, the receiving slot can be formed partially by the membrane insert and partially by a wall of the receiving opening.

Claims

1. A flow valve (10) which releases a fluid flow in a first direction and blocks the fluid flow in a second, opposite direction, the flow valve (10) being embodied as a diaphragm insert (12), having a membrane (1, 1A) which can be inserted into a receiving opening, and having a disk-shaped base body (2) which is made of a soft, elastic material, and having a membrane receiving portion (14), wherein means (5) for avoiding sticking are arranged on both sides of the disk-shaped base body (2), characterized in that the means (5) for avoiding sticking are embodied at least on the first side of the base body (2) as ribs (7A, 7B) arranged at the outer edge, the disk-shaped base body (2) of the membrane (1A) has a central opening (3), the central opening is a through hole or a cap (7C) and is used for inserting the membrane (1A) onto a receiving stud of the flow valve (10).

2. The flow valve (10) according to claim 1, characterised in that the at least one rib (7A, 7B) is embodied circumferentially or interrupted.

3. The flow valve (10) according to claim 1 or 2, characterised in that the means (5) for avoiding sticking are embodied on both sides of the base body (2) as ribs (7A, 7B) arranged at the outer edges.

4. The flow valve (10) according to claim 1 or 2, characterised in that the means (5) for avoiding sticking are embodied as a centrally arranged cap (7C) on the second side of the base body (2).

5. The flow valve (10) according to claim 1 or 2, characterised in that the diaphragm receptacle (14) has a sealing geometry (14.1) with at least one through-opening (14.3).

6. The flow valve (10) according to claim 5, characterised in that a disk-shaped base body of the diaphragm (1, 1A) is inserted through the central opening (3) onto a receiving stud (14.2) of the diaphragm receptacle (14).

7. The flow valve (10) according to claim 6, characterised in that the membrane (1, 1A) lies flat on the sealing geometry (14.1) and completely covers the at least one through-opening (14.3) in the shut-off state and at least partially releases the at least one through-opening (14.3) in the released state.

8. The flow valve (10) according to claim 1 or 2, characterised in that a sealing element (18) in the receiving slot (16) is arranged between the membrane insert (12) and the wall of the receiving opening, which sealing element seals the membrane insert (12) against the wall of the receiving opening.