Hydraulic manifold block for hydraulic assembly of hydraulic vehicle brake system

Abstract

The invention relates to a hydraulic manifold (1) of a hydraulic assembly (2) for a slip-regulated hydraulic external-force vehicle brake system, the hydraulic manifold having a primary piston (9) which protrudes from the hydraulic manifold (1) and on which a pin-shaped signal generator support (17) for a permanent magnet is arranged. The invention proposes that a tubular housing (20) is used to surround the primary piston (9) and the signal generator support (17), and two converging tangential walls are connected to the shape of a cylindrical housing.

Description

Technical Field

[0001] The invention relates to a hydraulic integrated block of a hydraulic assembly for a hydraulic vehicle brake device. Background Art

[0002] International patent application WO 2013 / 023953 A1 discloses a hydraulic assembly of a hydraulic external-force vehicle brake device for slip adjustment. The hydraulic assembly has a hydraulic integrated block in which a master brake cylinder bore is installed, and a master brake cylinder piston is movably accommodated in the master brake cylinder bore. The master brake cylinder piston can be moved by a pedal rod that is hingedly connected to the master brake cylinder piston and to a foot brake pedal, so as to generate brake pressure in the master brake cylinder bore. Summary of the invention

[0003] The hydraulic block according to the invention is provided for a hydraulic assembly of a hydraulic vehicle brake system, in particular for a hydraulic externally-forced vehicle brake system and / or a slip-controlled vehicle brake system. Slip control is in particular anti-lock braking, drive slip and / or driving dynamics control / electronic stability program, for which the abbreviations ABS, ASR and / or FDR / ESP are often used. The latter is also referred to in colloquial language as "anti-slip control". Slip control is known and will not be explained in detail here.

[0004] The hydraulic integrated block is used for the mechanical fixation and hydraulic connection of the hydraulic components of the vehicle brake system or its brake pressure regulating part and / or slip regulating part. Such hydraulic components are in particular solenoid valves, check valves, hydraulic storage devices, damping chambers and pressure sensors. For external force vehicle brake equipment, the hydraulic integrated block has an external force brake pressure generator, wherein the external force brake pressure generator usually has a piston-cylinder unit, which is arranged in the external force cylinder hole of the hydraulic integrated block. In order to generate brake pressure, a piston with an electric motor moves in the external force cylinder hole through a threaded transmission mechanism. The electric motor is installed on the outside of the hydraulic integrated block.

[0005] The hydraulic components are fixed in a receptacle in the hydraulic manifold, which is usually constructed as a cylindrical through hole or blind hole with a partially stepped diameter. "Connected" means that the receptacle or the hydraulic components fixed therein are connected via a pipeline in the hydraulic manifold according to the hydraulic circuit diagram of the vehicle brake system or its slip control unit. Typically, the pipeline is drilled into the hydraulic manifold.

[0006] When equipped with hydraulic components of a vehicle brake system or its slip control, the hydraulic block forms a hydraulic assembly, wherein “equipped” means that the hydraulic components are fixed in receptacles of the hydraulic block provided for them respectively.

[0007] The hydraulic wheel brakes of the vehicle's brake system are connected to the hydraulic manifold via brake lines.

[0008] The hydraulic manifold according to the present invention has a master brake cylinder bore in which a master brake cylinder piston is movably accommodated. The master brake cylinder bore is open on one side (here referred to as the first side) of the hydraulic manifold. The master brake cylinder bore has a through opening on the first side of the hydraulic manifold, from which the master brake cylinder piston protrudes. The master brake cylinder piston can be movably guided directly in the master brake cylinder bore or, for example, in a cylinder sleeve arranged in the master brake cylinder bore.

[0009] In order to protect the master brake cylinder piston from dirt and moisture, the hydraulic block according to the invention has a hollow, in particular tubular, housing which surrounds the part of the master brake cylinder piston that protrudes from the hydraulic block. The housing is arranged on a first side outside the hydraulic block, covers the opening of the master brake cylinder bore and is open in the region of the opening of the master brake cylinder bore so that the master brake cylinder piston can protrude from the master brake cylinder bore into the housing surrounding the master brake cylinder piston.

[0010] A signal generator support is fixed to the part of the master brake cylinder piston extending from the hydraulic integrated block at a certain distance from the hydraulic integrated block so that the master brake cylinder piston can be moved into the master brake cylinder hole to generate brake pressure. The part extends laterally beside the master brake cylinder piston into the signal hole, which extends parallel to the master brake cylinder hole in the hydraulic integrated block. In the signal generator hole, the signal generator support has a signal generator, such as a permanent magnet, whose signal can be measured by a sensor arranged near the signal generator hole in the hydraulic integrated block or the signal generator hole. The signal generator is used to determine the position or movement of the master brake cylinder piston.

[0011] According to the invention, the housing also surrounds the portion of the signal transmitter support that is located outside the signal transmitter hole of the hydraulic integrated block and that is located laterally beside the master brake cylinder piston. Thus, the signal transmitter support is also protected from dirt and moisture.

[0012] The improved scheme and advantageous design scheme of the present invention include but are not limited to: the housing has a stop for the master brake cylinder piston, and the stop limits the protrusion of the master brake cylinder piston from the hydraulic integrated block; the housing is tubular; the circumferential wall of the housing has the shape of a cylindrical shell segment or a truncated cone shell segment, and the cylindrical shell segment or the truncated cone shell segment extends more than 180° in the circumferential direction, and the two circumferential wall segments are tangentially connected at their longitudinal edges, and the circumferential wall segment increases with the distance from the cylindrical shell segment or the truncated cone shell segment. The outer shell section or the truncated cone cover section converges due to the increase of the outer shell section, and the cylindrical shell section or the truncated cone cover section is connected at the vertex, thereby obtaining a tubular shape that is closed on the circumference; the shell is a deep-drawn part; the shell has a hollow shaft neck, which extends into the hole in the hydraulic integrated block and orients the shell on the hydraulic integrated block; an expansion element is pressed into the hollow shaft neck, and the expansion element expands the hollow shaft neck and fixes it in the hole in the hydraulic integrated block; the hydraulic integrated block has two hollow shaft necks, which are arranged around the opening of the master brake cylinder hole.

[0013] All features disclosed in the description and drawings can be implemented in the embodiments of the present invention individually or in any combination in principle. The following embodiments of the present invention are possible in principle, which are not all but only have one or more features of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The invention is explained in detail below with reference to the embodiments shown in the drawings. It is shown in the drawings:

[0015] Figure 1 A perspective exploded view of a hydraulic integrated block according to the present invention is shown;

[0016] Figure 2 Shows Figure 1 Details of the hydraulic manifold; and

[0017] Figure 3 Shows Figure 1 Cross-sectional view of the hydraulic integrated block. DETAILED DESCRIPTION

[0018] exist Figure 1 and Figure 3 The hydraulic block 1 according to the invention shown in the figure is provided for a hydraulic assembly 2 of a hydraulic externally-forced vehicle brake system having a slip control. Such a slip control is, for example, an anti-lock brake, a drive slip and / or a driving dynamics control / electronic stability program, commonly referred to by the abbreviations ABS, ASR and / or FDR / ESP. Slip control is known and will not be discussed here.

[0019] In this embodiment, the hydraulic manifold 1 is a narrow, parallelepiped-shaped metal block, whose large sides facing each other are almost parallelepiped-shaped. "Narrow" means that the distance between the two large sides is no more than half of the length or width of the large sides. In this embodiment, the distance between the two large sides is approximately one-quarter to one-third of the length or width of the large sides. Other aspect ratios are also possible.

[0020] The hydraulic integrated block 1 is used for mechanical fixing and hydraulic connection of hydraulic components of a slip regulating part, including a brake pressure regulating part of an externally-forced vehicle brake device. Such hydraulic components are, in particular, solenoid valves, check valves, hydraulic storage devices, damping chambers and pressure sensors, which are fixed in a receptacle within the hydraulic integrated block. The receptacle can be a cylindrical sink, a blind hole and / or a through hole with a diameter step, and the hydraulic components are introduced therein and fixed in a pressure-tight manner, for example, by a surrounding caulking portion. The hydraulic components can be sunk into the receptacle or extend from the hydraulic integrated block 1. When equipped with hydraulic components, an electric motor 3 of an externally-forced brake pressure generator and an electronic controller 4, the hydraulic integrated block 1 forms a hydraulic assembly 2 for brake pressure regulation and slip regulation of an externally-forced vehicle brake device.

[0021] "Hydraulically connected" means that the receptacles for hydraulic components are connected to one another by lines that are guided through the hydraulic manifold 1 according to the hydraulic circuit diagram of the externally-forced vehicle brake system or its slip control. The receptacles and the lines form a so-called "drilling" of the hydraulic manifold 1, wherein the receptacles and the lines can in principle also be manufactured differently than by drilling. The hydraulic manifold 1 according to the invention is drilled in a Cartesian manner, which means that the receptacles for the hydraulic components and the lines connecting them extend parallel to one another and perpendicularly to one another and toward the sides and edges of the parallelepiped-shaped hydraulic manifold 1.

[0022] The hydraulic block 1 has a master brake cylinder bore 5 which is mounted parallel to an upper lateral side 6 and two large lateral sides in the hydraulic block 1. The upper lateral side 6 is so called because it is located at the top in the prescribed use position. A brake fluid storage container 7 is arranged toward the upper lateral side.

[0023] The master brake cylinder bore 5 is open on a first side 8 of the hydraulic block 1 and is closed or sealed at the opposite end. The first side 8 adjoins the upper lateral side 6 and two large side surfaces of the hydraulic block 1 .

[0024] A primary piston 9, which can also be called a rod piston, and a secondary piston 10, which can also be called a floating piston, are movably accommodated in the master brake cylinder bore 5. The primary piston 9 and the secondary piston 10 can also be considered as master brake cylinder pistons 9, 10. In the embodiment, they are hollow pistons, but this is not mandatory for the present invention. The first piston spring 11 is arranged between the two master brake cylinder pistons 9, 10. The secondary piston 10 is supported on the closed end of the master brake cylinder bore 5 by the second piston spring 12.

[0025] A pedal rod 14 is fixed in the primary piston 9 in an articulated manner by means of a fixing clamp 13, which pedal rod protrudes from the primary piston 9. The primary piston 9 can be moved in the master brake cylinder bore 5 and thereby generate a hydraulic brake pressure for actuating the vehicle brake system by means of a (foot) brake pedal or a (hand) brake lever (not shown) which can be connected in an articulated manner to the pedal rod 14. The brake pressure in the master brake cylinder bore 5 between the two master brake cylinder pistons 9, 10 moves the secondary piston 10.

[0026] The primary piston 9 projects on the first side 8 from the master brake cylinder bore 5 and from the hydraulic block 1. A driver ring 15 is fixedly arranged on the end of the primary piston 9 that projects from the hydraulic block 1, which driver ring has a circumferential groove on its outer circumference, into which complementary clamping claws 16 engage, which radially protrude from a pin-shaped signal transmitter support 17 so that the signal transmitter support 17 moves with the primary piston 9. The signal transmitter support 17 has a permanent magnet as a signal transmitter at its end facing away from the claws 16, which is located in the signal transmitter support 17 and is therefore not visible. The signal transmitter support 17 is fixed to the primary piston 9, which is the master brake cylinder piston, at a distance from the hydraulic block 1 by means of its claws 16 and the driver ring 15 fixedly arranged on the primary piston 9.

[0027] The signal transmitter support 17 is located parallel to the primary piston 9 next to the primary piston 9 and extends into the following signal transmitter hole 18, which is installed in the hydraulic manifold 1 parallel to the master brake cylinder hole 5. The signal transmitter support 17 is partially located outside the hydraulic manifold 1 like the primary piston 9. Figure 3 In the figure, the signal generator bracket 17 and the signal generator hole 18 are drawn as being screwed into the cutting plane around the master brake cylinder hole 5 so as to make them visible. In fact, in the embodiment of the present invention, the signal generator bracket 17 and the signal generator hole 18 are located behind the cutting plane, which is an axial plane of the master brake cylinder hole 5 parallel to the two large side surfaces of the hydraulic integrated block 1.

[0028] Transversely to the signal transmitter bore 18 and transversely to the master brake cylinder bore 5 is a bore for accommodating a magnetic sensor 19 in the hydraulic block 1 , with which the position of the permanent magnet forming the signal transmitter can be determined.

[0029] On the first side 8 of the hydraulic integrated block 1, that is, on the side where the primary piston 9 and the signal generator bracket 17 moving with the primary piston 9 extend from the hydraulic integrated block 1, a housing 20 is arranged, which is open on the first side 8 of the hydraulic integrated block 1, covers the opening of the master brake cylinder hole 5, and surrounds the primary piston 9 extending from the master brake cylinder hole 5 and from the hydraulic integrated block 1, as well as the signal generator bracket 17 also extending from the hydraulic integrated block 1.

[0030] The housing 20 is tubular and has a cylindrical shell-like circumferential wall, which extends in the circumferential direction over more than 180° and less than 270°, and to which two flat circumferential wall sections are tangentially connected, which extend obliquely relative to each other and are connected to the likewise cylindrical shell-like circumferential wall sections, thereby producing a tubular shape closed in the circumferential direction, which surrounds the primary piston 9 and the signal transmitter support 17 protruding from the hydraulic manifold 1. At the end facing away from the hydraulic manifold 1, the housing 20 has an end wall 21 with a hole coaxial with the master brake cylinder bore 5 for passing the pedal rod 14. The bore has a cylindrical tubular flange 22, to which a hose-like folded bellows 23 terminating at the pedal rod 14 is fixed. The housing 20 and the folded bellows 23 protect the primary piston 9, the signal transmitter support 17 and the master brake cylinder bore 5 from moisture and dirt.

[0031] The shape of the housing 20 is not mandatory for the present invention; a shape is selected here which tightly surrounds the primary piston 9 and the signal transmitter holder 17 .

[0032] The end wall 21 of the housing 20 forms a stop 24 for the primary piston 9, which limits the movement of the primary piston 9 out of the master brake cylinder bore 5 and out of the hydraulic block 1. The stop 24 determines the basic position of the primary piston 9, into which the piston springs 11, 12 move the primary piston 9 when no force is applied to the pedal rod 14.

[0033] The housing 20 has a fixing flange 25 at its open end opposite to the end wall 21, with which the housing is fixed to the first side 8 of the hydraulic manifold 1. The fixing flange 24 has two hollow journals 26 opposite to each other, which extend into the blind hole in the first side 8 of the hydraulic manifold 1 and are clamped there. The clamping force is increased by the sphere pressed into the hollow journal 26 and expanding the hollow journal 26, so that the hollow journal 26 is reliably held in the blind hole of the hydraulic manifold 1 and the housing 20 is reliably held on the hydraulic manifold 1. The sphere forms an expansion element 27, which ensures that the housing 20 does not move relative to the hydraulic manifold 1. In the figure, one of the two hollow journals 26 can be seen, which has a sphere pressed in as an expansion element 27.

[0034] The housing 20 and its fixing flange 25 are deep-drawn parts made of sheet metal, so that the fixing flange 25 is thin, which enables the hydraulic manifold 1 or the hydraulic assembly 2 equipped with hydraulic components of the brake pressure regulation part and the slip regulation part to be fixed, for example, near the front panel of a vehicle.

[0035] After the housing 20 is fixed to the first side 8 of the hydraulic manifold 1, the orifice plate 28 is placed on the fixing flange 25 and fixed to the hydraulic manifold 1 by means of bolts 29. The orifice plate 28 has a hole 30 for passing the housing 20, which has the cross section of the housing 20. Support bolts 31 protrude from the orifice plate 28 for fixing to the front wall of the vehicle.

[0036] In order to operate the vehicle brake system by external force, the hydraulic integrated block 1 has an external force cylinder hole 32, which can also be called a plunger piston (not shown) can be moved in the external force cylinder hole by means of an electric motor 3 via a planetary gear transmission mechanism and a threaded transmission mechanism that are not visible in the figure. In the embodiment shown in the present invention, the external force cylinder hole 32 vertically passes through the two large side surfaces of the hydraulic integrated block 1. The master brake cylinder hole 5 is located between the external force cylinder hole 32 and the upper lateral side 6 of the hydraulic integrated block.

[0037] In the lower transverse side 33 , which is opposite the upper transverse side 6 , a blind hole is arranged in the hydraulic block 1 as a simulator cylinder 34 , in which a spring-loaded simulator piston (not visible in the drawing) is accommodated axially displaceably.

[0038] The electronic control unit 4 is arranged opposite the electric motor 3 on one of the two large side surfaces of the hydraulic block 1 .

Claims

1. A hydraulic integrated block for a hydraulic assembly of a hydraulic vehicle brake device, wherein: The hydraulic integrated block (1) has a master brake cylinder hole (5), which is open on a first side (8) of the hydraulic integrated block (1) and in which a master brake cylinder piston (9) is movably accommodated, and is characterized in that the master brake cylinder piston (9) extends from the hydraulic integrated block (1), and a housing (20) is arranged on the first side (8) of the hydraulic integrated block (1), the housing covers the opening of the master brake cylinder hole (5), the housing is open in the area of ​​the opening of the master brake cylinder hole (5) and surrounds the part of the master brake cylinder piston (9) extending from the hydraulic integrated block (1), and is separated from the hydraulic integrated block (1) by a certain distance, and a signal generator bracket (17) is fixed on the part of the master brake cylinder piston (9) extending from the hydraulic integrated block (1), The signal generator bracket extends next to the master brake cylinder piston (9) into a signal generator hole (18), the signal generator hole extending parallel to the master brake cylinder hole (5) in the hydraulic integrated block (1), wherein the signal generator bracket (17) has a signal generator in the signal generator hole (18), and wherein the signal generator bracket (17) is also surrounded by a housing (20) outside the hydraulic integrated block (1), wherein the housing (20) has a hollow shaft neck (26) which extends into the hole in the hydraulic integrated block (1) and orients the housing (20) on the hydraulic integrated block (1), and wherein an expansion element (27) is pressed into the hollow shaft neck (26), which expands the hollow shaft neck (26) and fixes it in the hole in the hydraulic integrated block (1).

2. The hydraulic integrated block according to claim 1, characterized in that: The housing (20) has a stop (24) for the master brake cylinder piston (9), which limits the protrusion of the master brake cylinder piston (9) from the hydraulic block (1).

3. The hydraulic integrated block according to claim 1 or 2, characterized in that: The housing (20) is tubular.

4. The hydraulic integrated block according to claim 1 or 2, characterized in that: The circumferential wall of the shell (20) has the shape of a cylindrical shell segment or a truncated cone shell segment, the cylindrical shell segment or the truncated cone shell segment extends more than 180° in the circumferential direction, and two circumferential wall segments are tangentially connected at their longitudinal edges, the circumferential wall segments converge as the distance from the cylindrical shell segment or the truncated cone shell segment increases, and the cylindrical shell segment or the truncated cone shell segment is connected at the vertex, thereby obtaining a tubular shape that is closed on the circumference.

5. The hydraulic integrated block according to claim 1 or 2, characterized in that: The housing (20) is a deep-drawn part.

6. The hydraulic integrated block according to claim 1 or 2, characterized in that: The hydraulic block (1) has two hollow journals (26) which are arranged around the opening of the master brake cylinder bore (5).

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