WO2011054330A1

WO2011054330A1 - Hydraulic cylinder

Info

Publication number: WO2011054330A1
Application number: PCT/DE2010/001218
Authority: WO
Inventors: Alexandre Chevet; Richard Dubas
Original assignee: Schaeffler Technologies Gmbh & Co. Kg
Priority date: 2009-11-05
Filing date: 2010-10-14
Publication date: 2011-05-12
Also published as: BR112012010585A2; BR112012010585B1; DE102010048510A1; CN102596646A; DE112010004312A5; CN102596646B

Abstract

The invention relates to a hydraulic cylinder, in particular a master cylinder (1), comprising a device (7L, 7R) for fastening in an opening provided in the firewall (11)/chassis of a vehicle and elements for fastening in an opening of a wall of a pedal box (12), wherein the remaining opening between the master cylinder and the firewall is sealed by an elastic sealing element (7B). According to the invention, the distance between the opening in the firewall and the opening in the wall of the pedal box, in which the master cylinder is accommodated, and the position of said openings with respect to each other are compensated by means of the device, which is fastened to the master cylinder in a positionally fixed manner.

Description

hydraulic cylinders

The invention relates to a hydraulic cylinder, in particular a master cylinder with a device for attachment in an opening provided in the dashboard / chassis of a vehicle opening and elements for attachment in an opening of a wall of a pedal box having the features of the preamble of claim 1.

In DE 199 44 590 A1, an actuating device for an electrohydraulically actuated brake system is described, which consists of a first and a second assembly. In this case, the first, consisting of a fastening device, actuatable by means of an operating pedal pressure generator and a pedal travel simulator assembly, arranged in the passenger compartment, while the second, composed of a connection unit and a hydraulic pressure medium reservoir assembly is located in the engine compartment of the vehicle. Both assemblies are interconnected by means of a flexible composite line, so that at the same time a connection between the two rooms - passenger compartment and engine compartment - is made with this. For this purpose, the composite line is passed through the bulkhead / chassis of the vehicle. For this reason, a correspondingly large opening is provided in this. To facilitate assembly, the two ends of the composite line are provided with plugs, and on each module a socket is mounted, into which a line end on the respective side of the bulkhead is inserted.

From DE 197 25 260 A1 a solution for a hydraulic clutch and / or brake operation is known in which, for example, the overflow line runs from a pressure medium reservoir through the bulkhead into the passenger compartment through to a master cylinder which is connected to a pedal.

DE 10 2006 039 526 A1 discloses a solution for a structural unit, consisting of a pedal and a hydraulic cylinder for a vehicle, in which the hydraulic cylinder designed as a master cylinder is secured in a positionally secured manner on a dashboard / chassis of the motor vehicle via its housing. To accommodate the master cylinder a corresponding opening is provided in the bulkhead / chassis.

The Japanese application JP 610 33 355 A shows a hydraulic cylinder, which is accommodated in a pedal box and designed as a master cylinder, which projects through a bulkhead. carried out and attached to this. Here, the holes for receiving the master cylinder in the bulkhead and in the pedal box in size and location are the same, so that both walls can be connected by means of screw with the intended for this purpose on the master cylinder flange.

However, this type of connection of a master cylinder both to a wall of a pedal box and at the same time to a bulkhead / chassis requires the equality of the size and the position of both walls in the same or to a parallel plane. In this case, several screw connections are required in addition to the corresponding sealing elements.

In the solutions with the guided through the bulkhead through the lines required to have a larger diameter than that of the respective line, so that the line is supported relatively movable at the opening edge, however, the remaining free space between the line and the opening is not sealed and Thus, the passenger compartment is not or only insufficiently protected against ingress of dirt.

The object of the invention is therefore to propose a hydraulic cylinder, in particular a master cylinder, with a device for attachment in an opening provided in the bulkhead of a vehicle opening and elements for mounting in an opening in a wall of a pedal box, in which the assembly cost is reduced and also the attachment while ensuring the security against the ingress of dirt takes place, and on the device an adaptation to the respective installation space conditions in the vehicle, taking into account the equipment for the vehicle operation (left or right-hand drive) can be realized.

This object is achieved with a master cylinder with a device for attachment in an opening provided in the bulkhead of a vehicle opening and elements for attachment in an opening in a wall of a pedal box with the features of claim 1. Thereafter, the master cylinder is provided both with a means for attachment in an opening provided in the bulkhead of a vehicle opening, as well as with elements for attachment in an opening of a wall of a pedal box, wherein the remaining opening between the master cylinder and bulkhead to prevent the ingress of dirt of an elastic Sealing element is sealed. According to the invention, the device, which is attached fixed in position on the master cylinder, to the distance between the opening in the bulkhead and the opening in the pedal box, in which the master cylinder is received, and compensate their position to each other.

In an advantageous embodiment of the invention, the master cylinder on a single connection area over which both the connection to the pedal box and the connection to the bulkhead is realized, which is provided with a collar, in the circumference at least one recess is introduced. Advantageously, two recesses are arranged diagonally to each other in the scope of the Federal.

Moreover, it is advantageous that at least one positioning segment is attached to the front side of this collar. However, it is more advantageous to arrange a plurality of positioning segments distributed over the circumference, wherein each positioning segment is axially preceded by a locking element for this.

Advantageously, the device acts as an adapter, which is designed as a frusto-conical sleeve. At least one of the two end faces of the truncated cone of the adapter, advantageously facing the opening of the dashboard, runs as a collar radially outward. This collar serves as a contact surface for a seal to be applied to this.

For attachment of the adapter to the master cylinder, it is advantageous that its region facing the master cylinder has at least one positioning segment. However, it is advantageous for a secure hold of the adapter on the master cylinder to arrange a plurality of positioning segments distributed over the circumference of the receiving opening of the adapter, which are spaced apart by recesses. The positioning segments of the adapter, which advantageously have the same thickness or height as those of the master cylinder, engage in the gaps provided on the collar of the master cylinder so that the positioning segments of adapter and master cylinder alternate over the circumference, and thereby an end face form, which lies in a plane. These positioning segments, which are provided on both components, function both as anti-rotation and as positional fixing. In particular, the position fixing is important when using differently designed adapter for the respective handlebar operation (left or right-hand drive) of the vehicle. However, no clear position assignment is guaranteed via these positioning segments. A clear position assignment is achieved by at least one positioning element is provided in the interior of the truncated cone-shaped adapter, which engages during assembly with the provided on the circumference of the collar of the master cylinder recess is brought. However, it is more advantageous to provide two positioning elements in the interior of the adapter, as this additionally ensures a safeguard against rotation of the adapter relative to the master cylinder.

In order to seal the master cylinder inserted into the wall of the pedal box, a sealing element is advantageously introduced between the positioning segments and the locking elements, which may have, for example, the shape of a ring seal having a plurality of sealing ribs. Between this and the locking elements, the wall of the pedal box is advantageously clamped or the master cylinder is clamped in the opening of the wall of the pedal box.

By means of this adapter according to the invention, an arbitrarily executed master cylinder can be inserted into the pedal box, which fulfills the prerequisite of the connections on the wall thereof.

The invention will be explained in more detail with reference to an embodiment and associated figures.

Show it:

1 shows a perspective view of a master cylinder,

2 shows a perspective view of an adapter with attached seal,

FIG. 2 a shows the adapter from FIG. 2 in a further illustration,

3 shows the master cylinder of Figure 1 in another illustration,

FIG. 4 shows the master cylinder from FIG. 1 with an attached adapter,

FIG. 5 is a sectional view of the master cylinder used in a bulkhead, attached to a wall of a pedal box and completed in accordance with FIG. 6 and 7, the master cylinder according to Figure 4 in an embodiment for a left-hand drive variant and in an embodiment for a right-hand drive variant.

Figure 1 shows a preferably made of plastic hydraulic cylinder 1 in a perspective view, which acts as a master cylinder in a hydraulic path for clutch actuation and is designed accordingly constructive. This master cylinder 1 is connected on the one hand to a wall of a pedal box, not shown in this figure, in which a pedal is received. On the other hand, the master cylinder 1 is attached to the bulkhead, which is also referred to as a chassis, of a vehicle. Both for attachment to the wall of the pedal box and on the bulkhead in each case an opening of appropriate size is provided in these at the appropriate place. For receiving the master cylinder 1 in or on the wall of the pedal box, it is correspondingly formed in the connection region, in particular on the circumference of its lateral surface. Thus, the lateral surface of the master cylinder 1 is in this area in a covenant 4, in which two recesses 3 are diagonally spaced from each other. Axial this collar 4 are arranged in front of several distributed over the circumference, arc segmentally shaped running position elements 2 are advantageously cast, which are axially spaced apart also arcuate cast-locking elements 6. These locking elements 6 are also distributed over the circumference. This design of the master cylinder is designed so that it can be used universally both for a vehicle with left-hand drive operation as well as for a vehicle with right-hand drive operation. To adapt the master cylinder 1 to the respective installation conditions, in its different use for a left or right-hand drive while saving components for mounting the master cylinder 1 on the one hand to the wall of the pedal box and on the other hand on the bulkhead, preferably also made of plastic adapter 7R, 7L, which is designed in this example in the form of a truncated cone-shaped sleeve with a one-sided collar 7a, as shown for a left-hand drive operation in Figure 2. Through this adapter 7L, through which the fasteners are realized on both walls, the stability of the connection of the master cylinder 1 is increased at the same time on these two walls.

In Figure 2, the adapter 7L is already completed with a seal 7b to form a unit. This seal 7b is made of a porous sealing material and rests directly on the end face of the collar 7a of the adapter 7L. The shape of the adapter 7L is chosen so that on this, in this case in a left-hand drive of the vehicle, both the distance between the bulkhead and the receiving area of the master cylinder 1 and the position of the plane of the bulkhead to the plane of the symmetry axis or the hori- zontalen the master cylinder 1 is balanced. To ensure the position fixation on the lateral surface of the master cylinder 1, the adapter 7L has a plurality of distributed over the circumference arranged, inwardly directed arc segment-shaped positioning 9, which alternate with also arcuate recesses 8. In addition, it can be seen in this figure that provided for a left-hand drive operation master cylinder 1 due to the space conditions the adapter 7L, wherein the plane A of the end face of its collar 7a to the plane of the perpendicular to the axis of symmetry of the master cylinder B forms an angle α. Due to this angle α, the adapter 7L has the shape of a truncated cone.

FIG. 2a shows another illustration of the adapter 7L, so that both the recesses 8 and the positioning segments 9 are clearly visible in the latter. Further, in this figure, positioning elements 14 can be seen whose number and position coincide with those of the recesses 3 on the master cylinder 1.

Figure 3 illustrates in a further perspective view of the master cylinder 1, the structural design of its connection region to a pedal box not shown in this figure. From this illustration, the collar 4 embossed or molded Positioniersegmente 2 can be seen, where the locking elements 6 are axially spaced upstream. In addition, the recesses 3 in the collar 4 of the master cylinder 1 for receiving the provided on the adapter 7L connecting elements are visible.

FIG. 4 shows a perspective view of the adapter 7L provided with the seal 7b according to FIG. 2 and placed on the master cylinder 1. To produce this connection, the positioning segments 9 of the adapter 7L have been inserted into the intermediate spaces between the positioning segments 2 of the master cylinder 1, so that the positioning segments 9 of the adapter 7L alternate with the positioning segments 2 of the master cylinder 1. The adapter 7L now rests with its positioning segments 9 on the collar 4 of the master cylinder 1, so that it is positioned radially and axially on this. The other provided with the seal 7b end of the adapter 7L is provided for mounting the master cylinder 1 on the bulkhead of the vehicle. The above-mentioned positional fixing of the adapter 7L on the master cylinder 1 are also the positioning elements 14 shown in Figure 2a, which enter into an operative connection with the provided in the master cylinder 1 recesses 3 during assembly. By this positioning elements 14, in conjunction with the recesses 3, the desired position of the adapter 7 L is ensured on the master cylinder 1, wherein the positioning segments 2 and 9 serve to support a rotation of both parts to each other.

FIG. 5 shows the master cylinder 1 in a sectional view. Except that he is completed in this figure with the adapter 7L, even his attachment to the wall of a pedal box 12 and on the bulkhead 11 can be seen. It is further clear that between the collar 4 of the master cylinder 1, a seal 13 is arranged so that the implementation of the master cylinder 1 is sealed by the wall in the pedal box 12 of the seal 13 and thus protected against ingress of dirt. Also, to seal the introduced in the bulkhead 11 opening for receiving the adapter 7 L attached to it seal 7 b is provided. Since this seal 7b is made of porous material, it can be deformed in the assembly process so that its edges enclose the splashwall opening. Due to the elasticity of the seal 7b due to the material used for this, tolerances of the truncated cone shape of the adapter 7L can be compensated except for the positional tolerances of the master cylinder 1 completed with the adapter 7L.

The different design of the adapter for the respective application variant of the master cylinder 1 is clear from the sectional views of Figures 6 and 7. While the already known embodiment of the adapter 7L is shown in FIG. 6, the possible form of an adapter 7R for a vehicle operated by a right-hand drive vehicle is illustrated in FIG. The differently shaped shapes of the two adapters 7R, 7L are dependent on the position of the two mutually extending planes, the plane of the bulkhead to the plane of the end face of the master cylinder collar 4 (or the plane of the perpendicular to the axis of symmetry of the master cylinder 1) and of the different size Diameter of the receiving openings in the walls. While in FIG. 6 the angle .alpha. Which can be seen from the preceding figures is present between the two planes, in FIG. 7 the two planes run almost parallel to one another. By this compensation of the angle α between the planes with the aid of the correspondingly adapted shape of the adapter 7L, 7R, it is possible that the position of the plane of the axis of symmetry of the master cylinder 1 to the wall of the pedal box not shown in these figures 6, 7 is maintained.

With this inventive master cylinder with adapter, it is possible to realize its different application options and at the same time with only one additional component (adapter) the master cylinder both on the wall of a pedal box and on the injection wall of a vehicle to secure sealed, resulting in a reduction in the production and assembly costs.

LIST OF REFERENCES

1 hydraulic cylinder / master cylinder

2 positioning segment

3 recess

4 fret

5 recess

6 locking element

7a fret

7b seal

7R adapter / device for left-hand drive vehicles

7L adapter / device for right-hand drive

7 recess

8 positioning segment

9 positioning element

10 bulkhead

11 pedal box

12 seal

13 positioning element

A plane of the bulkhead

Plane of the face of the collar of the master cylinder

Angle between plane bulkhead or the master cylinder collar or the adapter collar and the plane of the perpendicular to the axis of symmetry of the master cylinder

Claims

claims

Hydraulic cylinder, in particular master cylinder (1), with means (7R, 7L) for attachment in an opening provided in the bulkhead (11) of a vehicle opening and elements for tight fastening in an opening in a wall of a pedal box (12), wherein the remaining opening between the master cylinder (1) and bulkhead (11) is sealed by an elastic sealing element (7b), characterized in that by means of the device (7R, 7L), which is fixed in position fixed to the master cylinder (1), the distance between the opening in the bulkhead (11) and the opening in the wall of the pedal box (12), in which the master cylinder (1) is accommodated and whose position is balanced with each other.

2. Hydraulic cylinder (1) according to claim 1, characterized in that it has a connection area, which is provided with a collar (4), in whose circumference at least one recess (3) is introduced, via which both the connection to the Wall of the pedal box (12) and the connection to the bulkhead (11) can be realized.

3. Hydraulic cylinder according to claim 1 and 2, characterized in that on the end face of the collar (4) at least one positioning segment (2) is mounted.

4. Hydraulic cylinder according to claim 3, characterized in that a plurality of positioning segments (2) are arranged distributed over the circumference.

5. Hydraulic cylinder according to claim 1, 3 and 4, characterized in that each positioning segment (2) at this spaced a locking element (6) is axially upstream.

6. Hydraulic cylinder according to claim 1, characterized in that the device acting as an adapter (7R, 7L) is designed as a frusto-conical sleeve whose cone opening terminates in a collar (7a).

7. Hydraulic cylinder according to claim 6, characterized in that on this collar (7a) a seal (7b) is arranged.

8. Hydraulic cylinder according to claim 6, characterized in that the end face of the other end of the adapter (7R, 7L) has at least one positioning segment (9). Hydraulic cylinder according to claim 6, characterized in that a plurality of positioning segments (9) distributed over the circumference of the receiving opening of the adapter (7R, 7L) are arranged, which are spaced by recesses (8) to each other.

Hydraulic cylinder according to claim 6, characterized in that on the inner surface of the adapter (7R, 7L) at least one positioning element (14) is provided.