DE102007041500B4 - Assembly consisting of a surge tank and a master cylinder for a hydraulic motor vehicle brake system - Google Patents

Abstract

Assembly consisting of a surge tank (1) and a master cylinder (2) for a hydraulic motor vehicle brake system, wherein the surge tank (1) has two attachment lugs (3, 4), each with an opening (5, 6), wherein the openings (5, 6 ) are aligned with an opening (7) of the master cylinder (2) and the surge tank (1) is fastened via a releasable connection by means of a fixing pin (8) which extends through the aligned openings (5, 6, 7), characterized in that the fastening pin (8) has a T-shaped head with at least one T-leg (10, 11) with a projection (12, 13), which surrounds the fastening lug (3) facing the T-leg (10, 11).

Description

The invention relates to an assembly consisting of a surge tank and a master cylinder having the features of the preamble of claim 1.

Such an assembly is for example from the DE 100 47 325 A1 known. The fastening pin known therefrom is provided as an angle pin and has a lug which can be locked in spring strips connected to the fastening lug. The angle pin is usually made of stainless steel. The disassembly is carried out with the aid of a tool from the attachment lugs, which is considered to be disadvantageous in particular with regard to an ever-smaller installation space of the assembly in the engine compartment.

Furthermore, are off DE 102 17 682 A1 . DE 198 47 323 A1 and DE 199 21 195 A1 Other assemblies with a stretchable attachment pin known, all of which have similar disadvantages in terms of tool-free assembly / disassembly or space requirements.

Other forms of attachment of the surge tank provide to connect the surge tank by means of screws with the master cylinder. For this purpose, a complex threading is required.

The object of the invention is to provide an improved to that effect assembly consisting of reservoir and master cylinder.

The object is achieved by an assembly according to claim 1. The disassembly of the mounting pin can be done in a simple manner without the aid of a tool at an easily accessible place in the engine compartment.

According to an advantageous embodiment of the invention, the fastening pin is formed symmetrically and has two T-legs, each with a lug.

Preferably, the lugs are provided elastically deformable and snap after installation of the fastening pin on an inner side of the attachment approach.

To simplify the production, the fixing pin made of plastic is provided.

The approaches of the T-legs can according to an advantageous embodiment have insertion bevels, whereby the mounting of the fastening pin is simplified.

Also ends of the attachment lugs are preferably slanted on its inside to facilitate the installation of the surge tank and to avoid jamming.

Other features, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and with reference to the drawing, which shows two embodiments. In each case shows very schematically:

1 an inventive assembly of a first embodiment consisting of reservoir and master cylinder in a three-dimensional view;

2 the module according to 1 in cross-section;

3 a longitudinal section of the assembly according to 1 in the field of attachment of the expansion tank;

4 a fixing pin of the first embodiment and

5 a fixing pin of a second embodiment.

1 to 4 schematically show a first embodiment of an assembly according to the invention consisting of a surge tank 1 and a master cylinder 2 for a hydraulic motor vehicle brake system, the structure and function are basically known. Not shown connecting piece of the expansion tank 1 are after its mounting on the master cylinder 2 in corresponding connection openings of the master cylinder 2 taken and connect in a known manner pressure fluid chambers of the expansion tank 1 with pressure chambers of the master cylinder 2 ,

The expansion tank 1 has a releasable connection with the master cylinder 2 two attachment approaches 3 . 4 each with an opening 5 . 6 on. These openings 5 . 6 aligned after mounting the expansion tank 1 on the master cylinder 2 with an opening 7 of the master cylinder 2 , For attachment is an in 4 illustrated fixing pin 8th provided, which through the aligned openings 5 . 6 . 7 extends through. The opening 7 of the master cylinder 2 is how particular out 2 shows, in the area of a master cylinder approach 19 provided as a through hole which extends between container connections 20 . 21 of the master cylinder 2 extends.

To the assembly and disassembly of the fixing pin 8th To simplify and allow without the aid of tools, is the mounting pin 8th symmetrical and substantially T-shaped and has a T-bridge 9 and two T-legs 10 . 11 on. In particular 3 can be seen, have the T-legs 10 . 11 approaches 12 . 13 on top of the attachment lug 3 of the expansion tank 1 after mounting the fixing pin 8th into the expansion tank master cylinder unit 1 . 2 embrace. Thus, the disassembly of the fastening pin 8th done without the aid of a tool in an easily accessible place in the engine compartment and the fixing pin 8th can, without the master cylinder 2 to be grasped, pulled out from one side.

The fixing pin 8th can be easily made of a plastic, with the approaches 12 . 13 are provided elastically deformable. These are designed hook-shaped at their ends and snap after mounting the fixing pin 8th on an inside 14 of the attachment approach 3 one.

bevels 15 . 16 at the ends of the lugs 12 . 13 facilitate the mounting of the fixing pin 8th ,

Furthermore, also ends of the attachment lugs 3 . 4 on their inside 17 . 18 slanted provided to the mounting of the expansion tank 1 on the master cylinder 2 to simplify and avoid jamming.

5 has a fixing pin 8th a second embodiment. As can be seen, this is also substantially T-shaped, but has only one T-leg 10 with an approach 12 on. The function corresponds to the fixing pin described for the first embodiment.

LIST OF REFERENCE NUMBERS

1

surge tank

2

master cylinder

3

mounting boss

4

mounting boss

5

opening

6

opening

7

opening

8th

fastening pin

9

T-Bar

10

T-leg

11

T-leg

12

approach

13

approach

14

inside

15

chamfer

16

chamfer

17

inside

18

inside

19

Master cylinder approach

20

container terminal

21

container terminal

Claims (6)

Assembly consisting of a surge tank ( 1 ) and a master cylinder ( 2 ) for a hydraulic motor vehicle brake system, wherein the expansion tank ( 1 ) two attachment approaches ( 3 . 4 ) each with an opening ( 5 . 6 ), wherein the openings ( 5 . 6 ) with an opening ( 7 ) of the master cylinder ( 2 ) and the expansion tank ( 1 ) via a detachable connection by means of a fastening pin ( 8th ), which extends through the aligned openings ( 5 . 6 . 7 ), characterized in that the fixing pin ( 8th ) a T-shaped head with at least one T-leg ( 10 . 11 ) with an approach ( 12 . 13 ), which corresponds to the T-leg ( 10 . 11 ) facing fastening attachment ( 3 ) surrounds. An assembly according to claim 1, characterized in that the fixing pin ( 8th ) is formed symmetrically and two T-legs ( 10 . 11 ) with one approach ( 12 . 13 ) having. An assembly according to claim 1 or 2, characterized in that the lugs ( 12 . 13 ) are provided elastically deformable and after assembly of the fastening pin ( 8th ) on an inside ( 14 ) of the fastening attachment ( 3 ) snap. Assembly according to claim 3, characterized in that the fixing pin ( 8th ) is provided of plastic. Assembly according to one of claims 1 to 4, characterized in that the approaches ( 12 . 13 ) of the T-legs ( 10 . 11 ) Chamfers ( 15 . 16 ) exhibit. An assembly according to claim 5, characterized in that ends of the attachment lugs ( 3 . 4 ) on its inside ( 17 . 18 ) are slanted.

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