DE102010052589A1 - Attachment of a master cylinder to a vehicle wall - Google Patents

Abstract

Connection of a master cylinder to a vehicle interior wall, in particular a bayonet-like connection, in which first shaped elements of the housing of the master cylinder engage with a wall region adjoining an assembly opening of the vehicle interior wall, in particular a bulkhead, by means of a relative rotational movement such that there is a frictional engagement when the assembly end position is reached , According to the invention, further shaped elements correspond between the housing and the vehicle interior wall / bulkhead, in such a way that, in order to secure this connection against unintentional loosening, the force / moment for loosening the connection is greater than the force / moment for establishing the connection by an additional positive connection between the housing of the master cylinder and the vehicle interior wall.

Description

The invention relates to a mounting of a master cylinder on a vehicle wall according to the preamble of the first claim.

Out DE 197 14 821 B4 a master cylinder for a hydraulically actuated clutch or brake of vehicles is known, which is positionally fixed by a screw on a pedal bracket. In such fasteners, the master cylinder is secured by the screw against unwanted release of the pedal bracket or the bulkhead. However, the assembly process is very difficult and time consuming.

There are further known mounting possibilities of pressure cylinders on spray walls or corresponding pre-assembly modules, in which the pressure cylinder is to be mounted relatively quickly and easily without tools on the bulkhead substantially.

So will in the DE 197 10 631 B4 a quick release for mounting a pressure cylinder on a housing described, wherein the pressure medium cylinder has a fastening device and a housing wall is provided with mounting structures which cooperate such that the pressure medium cylinder can be mounted without the aid of tools on the housing wall. The mounting structures have a plurality of through openings into which the fastening means of the fastening device can engage or reach. For assembly, the pressure medium cylinder is inserted in the axial direction and rotated in the mounting position. In order to prevent the pressure cylinder is incorrectly positioned or mounted, the mounting structures have correspondingly formed shapes and contours, which allow only a certain mounting option. To secure the quick release this additional securing means are assigned.

By a relatively easy assembly is also distinguished from the US 4,488,701 A known pressure cylinder, which can be attached to a bulkhead of a vehicle by a simple sliding and turning movement. For this purpose, the bulkhead is provided with a through-opening, through which the pressure medium cylinder can be introduced, and indeed so far, until a arranged around a housing of the pressure medium cylinder flange abuts the bulkhead. The passage opening has four bayonet openings in a symmetrical arrangement, through which bayonet base arranged correspondingly on the outer diameter of the pressure medium cylinder can be pushed through. By turning the printing cylinder by 45 °, the bayonet lock is closed. An arranged between the flange and bulkhead ring seal holds by their tension the bayonet lock backlash and here additionally introduced locking means secure the pressure cylinder against reverse rotation and falling out of the bulkhead.

In the attachment possibilities of a pressure medium cylinder shown here on a bulkhead securing elements against the back and fall of the pressure cylinder from the bulkhead securing elements are provided on the pressure cylinder and on the bulkhead, which are integrated into the fixture and thus structurally complex.

In the US 4,640,478 A a mounting structure for the attachment of a pressure cylinder to a housing is described, which consists of a bayonet closure with undercut and is arranged at a passage opening of the housing wall. The pressure cylinder is held by the spring force of an additional spring in its position. For this reason, the pressure cylinder on the circumference extending V-ribs, which can be inserted into recesses of projections which are mounted on the circumference of the passage opening of the housing wall. The assembly takes place by inserting the pressure cylinder in the housing wall to stop, then by a rotation of about 45 ° and finally by inserting the auxiliary spring for attachment of the pressure cylinder with its circumferential V-ribs in the provided on the housing wall notches in the bayonet lock.

Here, the pressure medium cylinder is held by an additionally introduced, separate component in its position, with the push-on the pressure medium cylinder auxiliary spring is characterized by a simple construction. However, there is the disadvantage in the use of a fuse element formed as a separate component that this can be lost during the disassembly of the pressure cylinder from the bulkhead. In addition, the mounting of the pressure cylinder by the attachment of the auxiliary spring is still relatively expensive.

In the publication DE 10 2009 013 988 A1 a bulkhead of a motor vehicle is described with a clutch master cylinder attached thereto, which is received at an opening of the bulkhead. The clutch master cylinder is supported by means of a collar axially on the bulkhead and is fixed by means of an abutment by screwing into it. Between the bulkhead and clutch master cylinder, a rotation is provided radially outside of the collar.

A disadvantage of all the compounds described above is that for connecting and opening almost the same force is required, creating the risk that the bayonet can accidentally solve. The object of the invention is to develop a mounting of a master cylinder on a vehicle wall, in particular by means of a bayonet closure, which reliably prevents unintentional release and has a simple structural design.

This object is achieved with a mounting of a master cylinder on a vehicle wall with the characterizing features of the first claim. Advantageous embodiments emerge from the subclaims.

In the particular bayonet-type connection of a master cylinder to a vehicle inner wall, in which the first form elements of the housing of the master cylinder with a at an opening of the vehicle inner wall, in particular a bulkhead, adjoining wall portion so meshed by a relative rotational movement, that upon reaching the Montageendposition a frictional engagement between the housing According to the invention, further form elements correspond between the housing and the vehicle inner wall in such a way that the force / torque for releasing the connection is greater than the force / moment for releasing the connection Establishing the connection between the housing of the master cylinder and the vehicle inner wall.

Preferably, in a first variant on the housing, a second mold element in the form of a survey and attached to the dash panel, a third mold element in the form of a corresponding recess with the survey, so that the survey and the recess in the manufacture of the bayonet-type compound with each other form-fitting engageable are.

The survey is particularly hemispherical in shape and designed to correspond to the depression in the form of a hemispherical recess.

When connecting the housing and the bulkhead hooked after a certain angle of rotation provided on the housing hemispherical elevation in a prefabricated recess / recess in the sheet, whereby the rotation takes place by positive engagement.

The simple turning, in which the only counterforce is the frictional force, which arises when opening the connection between a seal and the bulkhead, is no longer given, since in addition still the rotation must be overcome, so the hemispherical elevation must come from the depression , As a result, a higher security is given, since an additional force required to open the connection. This higher force is necessary because not only the frictional force must be overcome to open the connection, but also two coordinated movements are necessary. Firstly, a seal which is arranged between the housing and the bulkhead, axially more compressed and it is additionally necessary a rotational movement to guide the hemispherical elevation of the housing from the recess / recess of the bulkhead.

In a second variant, the housing of the master cylinder has radially outwardly extending second form elements in the form of flanks / ribs, which hook after completion of the bayonet connection in third form elements in the form of recesses in the bulkhead, so that a positive connection is formed.

For this purpose, a welding ring is provided on the housing, which comes to the bulkhead when making the connection to the plant and to which the flanks / ribs connect so that they protrude slightly.

Preferably, two opposite flanks / ribs project on the welding ring of the housing, which are each provided at their outer edges with a chamfer serving as an insertion bevel.

If the connection comes into its end position, that is to say against the stop of the housing, the flanks respectively hook into the corresponding recesses (preferably radial diameter widening of the assembly opening) on the metal sheet / bulkhead.

As in the first variant, the safeguard against the twisting of the sheet / bulkhead takes place here by means of a positive connection.

Also in this variant, the only counter force when opening now not only the frictional force, because in addition still the flanks must be overcome.

A higher level of security is also given in this variant in so far, since in addition a force must be applied to open. This higher force is necessary because not only the frictional force must be overcome to open the connection, but also two consecutive coordinated movements are necessary because the arranged between the sheet metal / bulkhead and housing seal must be compressed axially more and it is additionally required a rotational movement in order to turn the sheet / bulkhead over the flanks can.

Another advantage of this variant is that although the additional flanks must be added to the welding ring, but no changes, such as additional cutouts or punched, on the bulkhead / on the plate are required because the flanks in the existing cut-outs of the bulkhead / hook on the sheet metal.

The mounting force can be adjusted individually via the flank angle. Through the insertion of the flanks, the merging of welding ring / housing and bulkhead / sheet is facilitated.

On the other side of the flank, no chamfer should be placed so that when opening the connection, the turning apart is not facilitated, which is another security, since an additional force is necessary.

The height of the axial force required for opening can be adjusted via the shape design and the hardness of the seal.

In summary, it should be noted that in both variants, the realization of the rotation is based on the principle of adding a positive connection to a bayonet connection.

The inventive solution no additional components to increase the security against rotation are required. By opening the connection under greater force high security against rotation and thus high security against unintentional loosening of the connection are effected. In particular, the additional positive locking contributes to this, which must be solved when opening the connection.

The invention will be explained in more detail with reference to embodiments and accompanying drawings.

Show it:

1 a master cylinder which is connected to a vehicle inner wall in the form of a bulkhead, and in which, after the bayonet connection has been made, two form elements establish a positive connection,

2 the master cylinder according to 1 in a three-dimensional representation, from which a form element in the form of a hemispherical elevation can be seen,

3 the detail A according to 2 .

4 a side view of the master cylinder in the area of the detail A, but with the bulkhead,

5 the section AA according to 2 .

6 a front view of the bulkhead with the recess,

7 a side view of an attached to the bulkhead master cylinder, which is connected in addition to the bayonet connection via flanks / ribs with the bulkhead,

8th and 9 a three-dimensional representation of the welding ring on the housing of the master cylinder with itself to the welding ring adjacent flanks / ribs

10 a recess in the bulkhead when using a master cylinder with adjoining the welding ring flanks / ribs,

11 an enlargement of the section AA according to 7 ,

In 1 is the side view of a master cylinder G with a housing 1 shown with a vehicle interior wall in the form of a bulkhead 2 is connected and in which after the production of the bayonet connection two form elements in the form of a survey in the housing 1 and a depression in the bulkhead 2 make a positive connection, as from the following 2 to 6 is apparent. After making the bayonet connection are on a first page 2.1 the bulkhead 2 two first form elements 1.1 of the housing 1 , which are offset by 180 ° to each other. At the second page 2.2 the bulkhead 2 is under axial preload a seal 3 to which a flange 4 of the housing 1 followed. The elastic seal 3 was compressed when making the bayonet connection, so that between this and the bulkhead 2 a frictional force acts. The splashboard 2 is after making the bayonet connection between the gasket 3 and the first two form elements 1.1 clamped.

Out 2 , in which the master cylinder G is shown in three-dimensional representation, the two first form elements 1.1 can be seen, wherein the first form element lying here above 1.1 towards the flange 4 a second mold element in the nature of a hemispherical elevation 1.2 having.

The detail A according to 1 is in 3 and the side view according to 3 in 4 shown. This is again in an enlarged view the first form element 1.1 the master cylinder with the hemispherical elevation 1.2 seen. The first form element 1.1 points towards the dashboard 2 (only in 4 shown in partial section) on a contact surface, which in a first surface area 1.3 which forms a mounting slope running in the direction of the flange, and a second surface area 1.4 after making the connection on the first side of the bulkhead 2 is subdivided. The second form element in the form of the hemispherical elevation 1.2 is located at the second surface area 1.4 ,

Out 4 it can be seen that the between the form element 1.1 and the seal 3 clamped bulkhead 2 a hemispherical depression 2.3 in her first page 2.1 in which the survey 1.2 positively engages.

5 shows the section AA according to 4 , from which it can be seen that the second form element in the form of the survey 1.2 only on a first mold element 1.1 of the housing 1 is available. It is of course possible on every first mold element 1.1 a corresponding survey 1.2 and then in the bulkhead 2 two corresponding third form elements in the form of depressions 2.3 provided.

The front view of the splashboard 2 from the direction of the first page 2.1 with the hemispherical recess 2.3 is in 6 shown. The splashboard 2 has a mounting hole 2.4 on, through which the housing of the master cylinder, not shown here, is guided, until this with the seal on the not visible here second side of the bulkhead 2 is applied. Now be splashboard 2 and donor cylinder G rotated to each other so that the mounting slopes (first surfaces 1.2 according to 3 and 4 ) against the first page 2.1 the bulkhead 2 Press, causing the seal 3 is compressed. Then grab the second surfaces 1.4 the form elements 1.1 on the first page 2.1 the bulkhead 2 until the survey 1.2 after reaching a certain angle of rotation in the recess 2.3 positively engages.

As a result, a simple untwisting is no longer possible because only the rotation between the second and third form element, ie the hemisphere (survey), in the recess 2.3 sits, must be overcome. To release the connection must therefore first from the direction of the flange 4 the master cylinder G applied an axial force to the survey 1.2 from the depression 2.3 to solve. This requires the seal 3 axially more compressed. Now, in addition, a rotation is necessary to the sheet (bulkhead 2 ) over the ball / elevation 1.2 to be able to turn.

A second constructive embodiment is from the 7 to 11 seen.

7 shows the side view of one on the bulkhead 2 attached master cylinder G, in addition to the bayonet joint, by first mold elements 1.1 is made on the housing of the master cylinder G, on, on a welding ring 5 arranged, second form elements in the form of flanks / ribs, which are not visible here, a positive connection with the bulkhead 2 having. The welding ring 5 has first form elements 1.1 on that on the first page 2.1 the bulkhead 2 issue. At the second page 2.2 the bulkhead is under axial bias a seal 3 to which a flange 4 followed. The splashboard 2 is thus between the first form elements 1.1 and the seal 3 and the flange 4 attached.

In the figures 8th and 9 become three-dimensional representations of the welding ring 2 shown. At the welding ring 5 There are two offset by 180 ° to each other arranged first form elements 1.1 as well as a flange 4 , The first form elements 1.1 point towards the flange 4 contact surfaces 1.5 on, in the mounted state on the first page 2.1 the bulkhead 2 issue.

Radial between the first two form elements 1.1 are pairwise two second form elements in the manner of flanks / ribs 6 provided, which are also arranged offset by 180 ° to each other and mutually parallel outer side edges 6.1 exhibit. The first arranged in Montagerehrichtung edge 6 also has a mounting angle 6.2 on. The flanks / ribs 6 lie axially between the contact surface 1.5 of the first mold element 1 and the flange 4 ,

The 10 shows the front view of the bulkhead 2 that has a mounting hole 2.4 has, to which two opposite first radial extensions 2.5 for passing the first form elements 1.1 connect. In addition, there are two third form elements in the form of second radial extensions in each case between them 2.6 for the positive engagement of the second mold elements (flanks / ribs) after reaching the Montageendposition attached. The second radial extensions 2.6 have mutually parallel contact surfaces 2.7 on, between which in the mounted state, the flanks / ribs 6 with their side edges 6.1 (please refer 8th and 9 ) lie.

In 11 is the enlarged section AA according to 7 shown, from which it is apparent that in each case two pairs of flanks / ribs offset by 90 ° 6 at the welding ring 5 are arranged, in the mounted state in the recesses 2.5 the bulkhead 2 (S. 10 ) engage positively and that the pairwise flanks / ribs 6 mutually parallel side edges 6.1 have, wherein in each case in the assembly direction of rotation first arranged flank / rib 6 a mounting angle 6.2 having. Put to the flanks 6 are the first form elements 1.1 arranged for mounting through the first mounting hole 4 and their first radial extensions 2.5 are pluggable and in the assembled state on the first page 2.1 the bulkhead 2 (Please refer 7 ) issue.

If the connection comes to its final position, at the bulkhead 2 can not be rotated any further, so to the stop of the housing G, hook the flanks 6 each in the recesses 2.6 on the sheet metal / bulkhead 2 one.

As with the first variant, the safeguard against unintentional release between the bulkhead takes place here as well 2 and master cylinder G by positive locking.

Also in this variant, the only opposing force when opening is now no longer just the frictional force to the seal 3 , in addition there are the flanks 6 must be overcome.

A higher security is given in this variant insofar as there is still a force to be applied to open, there first the flange 4 must be pressed axially in the direction of the bulkhead, causing the elastic seal 3 as far as being compressed, that the flanks 6 axially out of the recess 2.6 the mounting hole 2.4 be pressed. In addition, then still a rotary motion is necessary to the splashboard 2 over the flanks 6 to turn so that the first form elements 1.1 in the area of the first radial extensions 2.5 the mounting hole 2.4 arrive and the connection can now be solved.

Another advantage of this variant is that although the additional flanks 6 to the welding ring 5 must be added or formed with this, but no changes, such as additional cutouts or punched on the bulkhead 2 / the sheet metal must be made, since the flanks 6 in the existing recesses 2.6 Hook.

The mounting force can be adjusted individually via the flank angle.

By the mounting angle 6.2 should the merging of welding ring 5 and splashboard 2 (or sheet) are facilitated.

On the other side of the flank 6 If no slant is provided so that when opening the connection, the unscrewing is not facilitated, which is a further security, since an additional force is necessary.

The size of the axial force required for opening can be adjusted via the height of the flanks and their shape design as well as the hardness of the seal.

With the solution according to the invention, a simple structural variant of an additional positive securing the bayonet-type connection between a master cylinder and a bulkhead or a sheet is created, which is realized by simple integration of mold elements and requires no additional components.

LIST OF REFERENCE NUMBERS

1

casing

1.1

first form elements

1.2

survey

1.3

first surface area

1.4

second surface area

1.5

contact surface

2

bulkhead

2.1

first page

2.2

second page

2.3

deepening

2.4

mounting hole

2.5

first radial extension

2.6

second radial extension

3

poetry

4

flange

5

weld ring

6

Edges / ribs

6.1

side edges

6.2

mounting bevel

G

Master cylinder

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19714821 B4 [0002]
• DE 19710631 B4 [0004]
• US 4488701 A [0005]
• US 4640478 A [0007]
• DE 102009013988 A1 [0009]

Claims (7)

Connection of a master cylinder (G) to a vehicle inner wall, in particular a bayonet-type connection, in which first form elements of the housing ( 1 ) of the master cylinder (G) with a to a mounting opening ( 2.4 ) of the vehicle interior wall, in particular a bulkhead ( 2 ), adjoining wall region in such a way by a relative rotational movement, that upon reaching the final assembly position, a frictional engagement is present, characterized in that between housing ( 1 ) and vehicle interior wall / bulkhead ( 2 ) further form elements correspond, such that to secure this connection against unintentional release the force / moment for releasing the connection by an additional positive connection of at least one second mold element with the vehicle inner wall / bulkhead ( 2 ) is greater than the force / moment for establishing the connection between the housing ( 1 ) of the master cylinder (G) and the vehicle inner wall / bulkhead ( 2 ). Connection according to claim 1, characterized in that on the housing ( 1 ) at least one second form element in the form of a survey ( 1.2 ) and at the bulkhead ( 2 ) a third form element in the form of a corresponding recess with the survey ( 2.3 ) and that the survey ( 1.2 ) and the depression ( 2.3 ) are in the manufacture of the bayonet-type compound engageable with each other so that at this point a positive connection is formed. Connection according to claim 2, characterized in that the survey ( 1.2 ) is hemispherical in shape and that the depression ( 2.3 ) is formed in the form of a hemispherical recess. Connection according to claim 1, characterized in that on the housing ( 1 ) at least one second mold element in the form of a radially outwardly extending flank / rib ( 6 ) is arranged after completion of the bayonet connection in a third shape element in the form of a recess / second radial extension ( 2.6 ) of the mounting opening ( 2.4 ) in the bulkhead ( 2 ) engages, so that a positive connection is formed. Connection according to claim 4, characterized in that the housing ( 1 ) a welding ring ( 5 ), to which the second form elements in the form of the flanks / ribs ( 6 ) connect. Connection according to claim 4 or 5, characterized in that on the welding ring ( 5 ) of the housing ( 1 ) two opposing flanks / ribs ( 6 ) protrude. Connection according to one of claims 4 to 6, characterized in that at least one flank / rib ( 6 ) on the side edge ( 6.1 ) a mounting angle ( 6.2 ) having.

Images