A hydraulic block for a hydraulic assembly of a hydraulic external force vehicle brake device

Abstract

In order to fix the add-on part (17) on the hydraulic block (1) of the hydraulic aggregate of a hydraulic external force vehicle brake device, the invention proposes that a hole with a flange (24) is configured in the fixing flange (21) of the add-on part (17), which is inserted clampingly into the fixing hole (23) of the hydraulic block (1). A hole disk as a fixing part (25) is arranged on the fixing flange (21) and is fixed with a screw which is screwed into the fixing hole (23) of the hydraulic block (1).

Description

A hydraulic block for a hydraulic assembly of a hydraulically driven vehicle braking device. Technical Field

[0001] The present invention relates to a hydraulic block of a hydraulic assembly for a hydraulic external force vehicle braking device having the features of the preamble of claim 1. Background Technology

[0002] International patent application WO 2017 / 137 135 A1 discloses a hydraulic assembly for a hydraulic external force vehicle braking device with slip adjustment. The assembly has a flat, rectangular hydraulic block with a main brake cylinder bore and an external force cylinder bore transversely to the main brake cylinder bore, extending through the hydraulic block from one large side to an opposite large side. The main brake cylinder bore is disposed parallel to the two large sides within the hydraulic block and has an opening on a narrow side of the hydraulic block, which is fixed to the front bulkhead of the vehicle. In an extension of the main brake cylinder bore, a hollow mounting piece is arranged on the narrow side of the hydraulic block, surrounding the main brake cylinder piston, which extends from the hydraulic block in a base position. The mounting piece has a fixing flange with two opposing through holes aligned with a fixing hole in the narrow side of the hydraulic block outside the main brake cylinder bore. A perforated plate-shaped fastener is arranged on the mounting flange of the add-on. This fastener has a through-hole aligned with the through-hole of the mounting flange and the fixing hole in the hydraulic block. Through this through-hole, the fastener and the add-on are secured to the narrow side of the hydraulic block by means of screws screwed into the fixing hole of the hydraulic block. Support bolts extend from the fastener away from the hydraulic block for securing to the front bulkhead. Summary of the Invention

[0003] According to the invention, a hydraulic block configuration having the features of claim 1 is provided for a hydraulic assembly of a hydraulic vehicle braking system, particularly for hydraulic external force vehicle braking systems and / or slip-adjusting vehicle braking systems. Slip-adjusting devices are especially anti-lock braking systems, actuation slip-and / or driving dynamics adjustment devices / electronic stability programs, commonly abbreviated as ABS, ASR, and / or FDR / ESP. The latter is also commonly referred to as "anti-slip adjustment device." Slip-adjusting devices are known and will not be further described here.

[0004] This hydraulic block is used for the mechanical fixing and hydraulic connection of hydraulic components in vehicle braking equipment or its brake pressure regulating device and / or slip adjustment device. Such hydraulic structural components include, in particular, solenoid valves, check valves, hydraulic reservoirs, damper chambers, and pressure sensors. For externally driven vehicle braking equipment, the hydraulic block has an external braking pressure generator, which typically has a piston-cylinder unit mounted in the external force cylinder bore of the hydraulic block. To generate braking pressure, an external force piston equipped with an electric motor moves within the external force cylinder bore via a threaded transmission mechanism. The electric motor is located externally on the hydraulic block.

[0005] Hydraulic structural components are fixed in receptacles within a hydraulic block, which are mostly constructed as cylindrical through-holes or blind holes, some with stepped diameters. "Connection" means that the receptacle or the hydraulic structural components fixed within it are connected via piping within the hydraulic block according to the hydraulic circuit diagram of the vehicle's braking system or its slip adjustment mechanism. The piping is typically drilled within the hydraulic block.

[0006] Hydraulic structural components for assembling vehicle braking equipment or its slip adjustment device, wherein the hydraulic blocks form a hydraulic assembly, wherein "assembly" means that the hydraulic structural components are fixed in corresponding receiving portions provided for them in the hydraulic blocks.

[0007] The hydraulic wheel brakes of the vehicle braking system are connected to the hydraulic blocks via brake lines.

[0008] The hydraulic block according to the invention has a master brake cylinder bore in which the master brake cylinder piston can be moved by muscle force generated by a foot brake pedal. The master brake cylinder bore has an opening on one side of the hydraulic block, referred to herein as the fixed side. In addition to the master brake cylinder bore, the hydraulic block has at least one fixing hole, preferably having internal threads, on the fixed side.

[0009] An attachment is arranged on the fixed side of the hydraulic block. The attachment has an opening for the master brake cylinder piston that covers the opening of the master brake cylinder bore in the hydraulic block. Furthermore, the attachment has at least one through hole aligned with at least one fixing hole on the fixed side of the hydraulic block.

[0010] To secure the hydraulic block to the front bulkhead of the vehicle, the hydraulic block according to the invention has a fastener arranged on the add-on. The fastener has a through opening for the master brake cylinder piston and at least one through hole, the through opening covering the opening of the add-on and the orifice of the master brake cylinder bore in the hydraulic block, and the through hole covering at least one through hole in the add-on and at least one fixing hole on the fixing side of the hydraulic block.

[0011] To secure the mounting and fastening components to the fixed side of the hydraulic block, at least one fastening element is fixed in at least one fastening hole in the hydraulic block, passing through a through-hole in the mounting and fastening components. The fastening element may be, for example, a screw, bolt, or typically a helical element screwed into the fastening hole of the hydraulic block. The fastening element may also be, for example, a bolt or pin, riveted, welded, or otherwise secured in the fastening hole of the hydraulic block. This example is exemplary and not conclusive.

[0012] The mounting piece has, for example, a tubular flange on at least one of its through holes, which clamps into at least one fixing hole on the fixing side of the hydraulic block in a plug-like manner, and the flange is passed through by at least one fixing element, which is fixed in at least one fixing hole in the hydraulic block.

[0013] The attachment is temporarily secured to the fixed side of the hydraulic block by clamping it into at least one flange in at least one fixing hole until the attachment is finally secured to the hydraulic block by means of the fixing member and / or at least one fixing element.

[0014] Preferably, the mounting component has a fixing flange having at least one through hole on which a fastener, for example, in the shape of a perforated plate, is arranged.

[0015] The dependent claims contain improvements and advantageous designs of the invention as given in the independent claims.

[0016] All features disclosed in the specification and drawings may be implemented individually or in virtually any combination in embodiments of the invention. The invention does not possess all the features of the claims or embodiments thereof, but rather embodiments having only one or more features are possible in principle. Attached Figure Description

[0017] The invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0018] Figure 1 shows a simplified exploded perspective view of the hydraulic block according to the present invention;

[0019] Figure 2 shows a detailed cross-section of the hydraulic block in Figure 1; and

[0020] Figure 3 shows a magnified detail according to arrow III in Figure 2. Detailed Implementation

[0021] The hydraulic block 1 shown in the accompanying drawings is configured as a hydraulic assembly for a hydraulic external vehicle braking device, which has a slip adjustment device. Such a slip adjustment device is, for example, an anti-lock braking system (ABS), a drive slip system (ASR), and / or a driving dynamics adjustment device / electronic stability program (FDR / ESP), for which the abbreviations ABS, ASR, and / or FDR / ESP are used. Slip adjustment devices are known and will not be described herein.

[0022] In this embodiment, the hydraulic block 1 is a narrow, rectangular metal block whose large, opposing sides are nearly square. "Narrow" means that the distance between the two large sides is no greater than half the length or width of the large side. 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 side. Other aspect ratios are possible.

[0023] Hydraulic block 1 is used to mechanically fix and hydraulically connect hydraulic structural elements of a slip adjustment device, including a brake pressure regulating device for an externally powered vehicle braking system. These hydraulic structural elements, in particular solenoid valves, check valves, hydraulic reservoirs, damper chambers, and pressure sensors, are fixed in a receiving portion within the hydraulic block. This receiving portion is a cylindrical recess, blind hole, and / or through hole, which may have a stepped diameter, and the hydraulic structural element is introduced into it and pressure-sealed or fixed by, for example, a surrounding plug. The hydraulic structural element can be recessed into the receiving portion or protrude from the hydraulic block 1. Equipped with the hydraulic structural elements, hydraulic block 1 forms a hydraulic assembly for brake pressure generation, brake pressure regulation, and slip adjustment of an externally powered vehicle braking system.

[0024] Hydraulic connection means that the housings for hydraulic structural components are connected to each other by pipes guided through the hydraulic block 1 according to the hydraulic wiring diagram of the vehicle braking device or its slip adjustment device. The housings and pipes form a so-called "drill" in the hydraulic block 1, wherein the housings and pipes may, in principle, be manufactured differently from those manufactured by drilling.

[0025] The hydraulic block 1 has a master brake cylinder bore 2, which is parallel to two large side surfaces of the hydraulic block 1 and positioned in the middle between the two large side surfaces. The brake fluid reservoir 4 is placed on or is positioned on the upper narrow side 3. The upper narrow side 3 is so named because it is located at the top in the installation position of the hydraulic block 1. In this embodiment, the master brake cylinder bore 2 is positioned in the hydraulic block 1 parallel to the upper narrow side 3.

[0026] The master brake cylinder bore 2 is open on the narrow side of the hydraulic block 1, meaning that the master brake cylinder bore has an opening on the narrow side of the hydraulic block 1, referred to herein as the fixed side 5. At the opposite ends, the master brake cylinder bore 2 is closed or shut. The fixed side 5 is adjacent to the upper narrow side 3, and like the upper narrow side 3, it is adjacent to the two large sides of the hydraulic block 1. The fixed side 5 is so named because it is provided for fixing to a front bulkhead of a vehicle (not shown). This bulkhead separates the passenger compartment below the windshield from the engine compartment of the vehicle. The hydraulic block 1 is fixed to the bulkhead within the engine compartment.

[0027] A main piston 6, also referred to as a rod piston, and a secondary piston 7, also referred to as a floating piston, are movably housed in the main brake cylinder bore 5. The main piston 6 and secondary piston 7 can also be understood as main brake cylinder pistons 6 and 7. In this embodiment, they are hollow pistons; however, this is not mandatory for the present invention. A first piston spring 8 is arranged between the two main brake cylinder pistons 6 and 7. The secondary piston 7 is supported on the closed end of the main brake cylinder bore 2 by a second piston spring 9.

[0028] A pedal rod 11, extending from the main piston 6, is hingedly fixed to the main piston 6 by means of a retaining clamp 10. The main piston 6 can move within the main brake cylinder bore 2 via a (foot) brake pedal (not shown) that is hinged to the pedal rod 11, thereby generating hydraulic braking pressure for operating the vehicle's braking system. The braking pressure in the main brake cylinder bore 2 between the two main brake cylinder pistons 6 and 7 causes the auxiliary piston 7 to move.

[0029] The main piston 6 extends from the master brake cylinder bore 2 and from the hydraulic block 1 on the fixed side 5. A drive ring 12 is fixedly arranged on the end of the main piston 6 extending from the hydraulic block 1. The drive ring has a circumferential groove in its outer periphery, into which a complementary claw 13 engages. This claw extends radially from a pin-shaped signal transmitter holder 14, causing the signal transmitter holder 14 to move together with the main piston 6. The signal transmitter holder 14 has a permanent magnet as a signal transmitter at its end away from the claw 13. This permanent magnet is located within the signal transmitter holder 14 and is therefore invisible.

[0030] The signal transmitter holder 14 is located parallel to the main piston 6, next to it, and extends into the signal transmitter hole 15, which is parallel to the main brake cylinder hole 2 and is positioned next to the main brake cylinder hole 2 in the hydraulic block 1. The signal transmitter holder 14, like the main piston 6, is partially located outside the hydraulic block 1.

[0031] A housing 16 is arranged on the fixed side 5 of the hydraulic block 1, on which the main piston 6 and the signal transmitter holder 14, which moves together with the main piston 9, extend from the hydraulic block 1. This housing can also be understood as an attachment 17. In this embodiment, the housing 16 forming the attachment 17 is made of metal, for example, deep-drawn from sheet metal; however, this is not mandatory for the present invention. The housing 16 is a hollow body, and in this embodiment it is tubular, for example, cylindrical, and in principle has any cross-section. It can also vary its cross-section along its length, for example, by tapering in one direction. In this embodiment, the housing 16 forming the mounting 17 has a droplet-shaped cross-section, which means that the housing 16 has a cylindrical peripheral wall section that extends more than 180° and less than 270° in the circumferential direction, and two flat peripheral wall sections are tangentially connected to the peripheral wall section. These two flat peripheral wall sections extend obliquely to each other and are connected to the same cylindrical peripheral wall section, thereby obtaining a tubular shape that is closed in the circumferential direction, which surrounds the main piston 6 and the signal transmitter holder 14 extending from the hydraulic block 1.

[0032] At the end furthest from the hydraulic block 1, the housing 16 has a hole coaxial with the master brake cylinder bore 2 through which the pedal lever 11 passes. This hole has a flange 18 to which a flexible bellows 19 is fixed, terminating on the pedal lever 11. The housing 16 with the bellows 19 protects the master piston 6, the signal transmitter holder 14, and the master brake cylinder bore 2 from moisture and dirt.

[0033] On the fixed side 5 of the hydraulic block 1, the housing 16 forming the mounting part 17 has an opening 20 that covers the opening of the master brake cylinder bore 2.

[0034] To be secured to the fixed side 5 of the hydraulic block 1, the housing 16 forming the mounting 17 has a fixing flange 21, which is used to secure the housing to the fixed side 5 of the hydraulic block 1. The fixing flange 21 has two through holes 22, which are aligned with two fixing holes 23 of the hydraulic block 1. The fixing holes 23 are positioned opposite each other in the fixed side 5 of the hydraulic block 1 with respect to the master brake cylinder bore 2. The two fixing holes 23 are positioned parallel to the master brake cylinder bore 2, outside the master brake cylinder bore 2, at a distance from it, for example, approximately corresponding to its radius. In this embodiment, the fixing holes 23 are blind holes with internal threads.

[0035] The mounting flange 21 of the housing 16 forming the mounting component 17 has a tubular flange 24 surrounding two through holes 22, which clamps into two mounting holes 23 of the hydraulic block 1 (FIG. 2). This forms a plug-in connection that holds the mounting component 17 on the fixed side 5 of the hydraulic block 1. Tolerance compensation for positional errors between the mounting holes 23 in the hydraulic block 1 and the flanges 24 of the mounting component 17 is achieved through elastic deformation or possibly plastic deformation of the mounting flange 21 and / or the flanges 24.

[0036] In this embodiment, the flange 24 has a recess 31 at the opposite circumferential position, such that only two hollow cylindrical circumferential segments 32 exist in the tubular flange 24 at the opposite circumferential positions, and the circumferential segments are clamped into the fixing hole 23 of the hydraulic block 1 (FIG. 3). This improves the radial spring action for inserting the flange 24 into the fixing hole 23. The existing circumferential segments 32 of the flange 24 may also be arched instead of cylindrical. Another possibility is, for example, that the outer periphery of the flange 24 is different from the inner periphery of the fixing hole 23, that is, for example, a flange 24 having an elliptical cross-section in a cylindrical fixing hole 23 (not shown).

[0037] A perforated plate is mounted as a fastener 25 on the fixing flange 21 of the housing 16 forming the mounting component 17. This fastener has a through opening 26 that surrounds the tubular section of the housing 16 and covers the opening of the master brake cylinder bore 2. The fastener 25 has two through holes 27 that cover the through holes 22 in the fixing flange 21 of the housing 16 and the fixing hole 23 in the hydraulic block 1. Two screws (which can also be understood as helical elements or fastening elements 28) pass through the through holes 27 and 22 in the fastener 25 and fixing flange 21 of the housing 16 forming the mounting component 17, and are screwed into the internal threads of the fixing hole 23 through the flange 24 of the fixing flange 21, which is inserted into the fixing hole 23 in the hydraulic block 1. Thus, the fastener 25 and the mounting component 17 are fixed to the fixing side 5 of the hydraulic block 1.

[0038] Two bolts extend from the side of the fastener 25 away from the hydraulic block 1 as support bolts 29 for securing the hydraulic block 1 to the front bulkhead of an automobile (not shown). The fastener 25 forms an adapter that can be replaced by another matching fastener 25 to fit a front bulkhead with a different hole pattern.

[0039] For external force operation of the vehicle braking device, the hydraulic block 1 has an external force cylinder bore 30, in which an external force piston (not shown, also referred to as a plunger piston) can be moved by means of an electric motor via a planetary gear transmission mechanism and a threaded transmission mechanism. The electric motor, planetary gear transmission mechanism, and threaded transmission mechanism are not shown. The electric motor and the external force cylinder bore 30 are coaxially fixed externally to the hydraulic block 1, and the planetary gear transmission mechanism and threaded transmission mechanism are also coaxially arranged between the electric motor and the external force piston. In the illustrated embodiment of the invention, the external force cylinder bore 30 passes vertically through the two large side surfaces of the hydraulic block 1; that is, the external force cylinder bore 30 passes transversely to the main brake cylinder bore 2 on the narrow side 3 facing away from the upper part of the hydraulic block 1, below the main brake cylinder bore 2.

Claims

1. A hydraulic block for a hydraulic assembly of a hydraulically driven vehicle braking device, wherein, The hydraulic block (1) has: a fixing side (5) for fixing the hydraulic block (1) to the front bulkhead of a vehicle; a main brake cylinder bore (2) having an opening on the fixing side (5) of the hydraulic block (1); at least one fixing hole (23) on the fixing side (5) outside the main brake cylinder bore (2); an add-on (17) arranged on the fixing side (5) of the hydraulic block (1) and having - an opening (20) for the main brake cylinder piston (6) covering the opening of the main brake cylinder bore (2) in the hydraulic block (1), and - at least one through hole (22) aligned with the fixing hole (23) in the fixing side (5) of the hydraulic block (1); and a fastener (25) for fixing the hydraulic block (1) to the front bulkhead of a vehicle, the fastener arranged on the add-on (17) and having - A through opening (26) for the master brake cylinder piston (6), the through opening covering the opening (20) of the mounting (17) and / or surrounding the mounting (17) and covering the orifice of the master brake cylinder bore (2) in the fixed side (5) of the hydraulic block (1), and - At least one through hole (27) covering at least one through hole (22) in the mounting (17) and at least one fixing hole (23) in the hydraulic block (1); wherein the mounting (17) and the fixing member (25) are fixed to the fixing side (5) of the hydraulic block (1) by means of at least one fixing element (28), the fixing element passing through the through holes (22, 27) of the mounting (17) and the fixing member (25) and fixed in at least one fixing hole (23) in the hydraulic block (1); characterized in that the mounting (17) has a flange (24) on the at least one through hole (22), the flange clampingly engaging in at least one fixing hole (23) in the fixing side (5) of the hydraulic block (1) and the flange being passed through by the at least one fixing element (28).

2. The hydraulic block according to claim 1, characterized in that, The flange (24) has an outer periphery that is different from the inner periphery of the fixing hole (23) in the fixing side (5) of the hydraulic block (1).

3. The hydraulic block according to claim 1 or 2, characterized in that, The flange (24) has a recess (31).

4. The hydraulic block according to claim 1 or 2, characterized in that, The mounting (17) is metal and / or has exactly two flanges (24).

5. The hydraulic block according to claim 1 or 2, characterized in that, The fastener (25) has at least one support bolt (29) for fixing to the front bulkhead of the vehicle, the support bolt extending from the side of the fastener (25) away from the hydraulic block (1).

6. The hydraulic block according to claim 1 or 2, characterized in that, The mounting component (17) is a hollow body arranged in an extension of the master brake cylinder bore (2) on the fixed side (5) of the hydraulic block (1). The hollow body surrounds the master brake cylinder piston (6) extending from the master brake cylinder bore (2) and has a fixing flange (21) arranged on the fixed side (5) of the hydraulic block (1) and has at least one through hole (22) for fixing an element (28) for fixing to the hydraulic block (1).

7. The hydraulic block according to claim 6, characterized in that, The fastener (25) is plate-shaped and is placed on the fixing flange (21) of the mounting (17).

8. The hydraulic block according to claim 1 or 2, characterized in that, The hydraulic block (1) has an external force cylinder bore (30).

Images