CN110650876A

CN110650876A - Hydraulic assembly of a slip control mechanism of a vehicle brake system having an electric motor

Info

Publication number: CN110650876A
Application number: CN201880033684.1A
Authority: CN
Inventors: M·施利茨库斯; T·赞德尔; M·勒夫勒
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2017-05-23
Filing date: 2018-04-27
Publication date: 2020-01-03
Also published as: WO2018215169A1; DE102017208672A1; KR20200010267A

Abstract

The invention relates to a hydraulic unit (10) for a slip control mechanism of a hydraulic vehicle brake system, comprising: a hydraulic block (14) on which at least one electrically operated hydraulic valve (16) and at least one electrically operated hydraulic pump (56) are arranged; a motor block for driving at least one hydraulic pump (56); and a control circuit board (24) for controlling the at least one hydraulic valve (16) and the motor block (12), wherein the motor block (12) is arranged with its block-shaped first side (40) on the hydraulic block (14). According to the invention, the control circuit board (24) is arranged on the motor block (12) on a second side (42) of the motor block (12) opposite the first side (40).

Description

Hydraulic assembly of a slip control mechanism of a vehicle brake system having an electric motor

Technical Field

The invention relates to a hydraulic assembly of a slip control mechanism of a hydraulic vehicle brake system, comprising: a hydraulic block, on which at least one electrically operated hydraulic valve and at least one electrically operated hydraulic pump are arranged; a motor block for driving at least one hydraulic pump; and a control circuit board for controlling the at least one hydraulic valve and the motor block, wherein the motor block is arranged with its block-shaped first side on the hydraulic block.

Background

The slip control mechanism is used in vehicles, in particular in motor vehicles such as motorcycles, passenger cars or trucks, as an anti-lock control mechanism, a drive slip control mechanism and/or a driving power control mechanism. The heart of such a slip control mechanism is a hydraulic unit having a hydraulic block which is equipped with the hydraulic components of the slip control mechanism and is connected to the master brake cylinder via brake lines, and one or more hydraulic wheel brakes are connected to the master brake cylinder via brake lines. The hydraulic components are here solenoid valves or electrohydraulic valves, hydraulic or hydraulic pumps (usually designed as piston pumps) and check valves, hydraulic accumulators, damping chambers and pressure sensors. The hydraulic block is typically a cuboid metal block which serves for the mechanical fastening and hydraulic coupling of the hydraulic components of the slip control mechanism. "coupled" here means that the hydraulic components are hydraulically connected according to the hydraulic connection diagram of the slip control mechanism.

In general, during the complete installation of the hydraulic pump in the receptacle of the hydraulic block, only that part of the hydraulic valve which is normally hydraulic is installed in the associated receptacle of the hydraulic block. Conversely, the so-called electromagnetic part of the hydraulic valve is arranged outside the hydraulic block.

The publication DE 102006059924 a1 discloses a hydraulic block of a hydraulic unit for a slip control mechanism of a hydraulic vehicle brake system, for which all receptacles for solenoid valves of the slip control mechanism are arranged in the head side of a cuboid hydraulic block, which can also be referred to as a valve side. The electric motor is arranged as a pump motor outside the motor side of the hydraulic block.

Disclosure of Invention

According to the invention, a hydraulic assembly for a slip control mechanism of a hydraulic vehicle brake system is provided, comprising: a hydraulic block on which at least one electrically operated hydraulic valve and at least one electrically operated hydraulic pump are arranged; a motor block for driving at least one hydraulic pump; and a circuit board for controlling at least one hydraulic valve and a motor block, wherein the motor block is arranged with its block-shaped first side on the hydraulic block. According to the invention, the control circuit board is arranged on the motor block on a second side of the motor block opposite the first side.

According to the invention, the control circuit board is arranged on the motor block on the side of the motor block facing away from the hydraulic block, whereby the control circuit board can be electrically connected to the electric motor installed in the motor block by means of short line paths. On the other hand, the motor block can be made voluminous and can also advantageously contact other electrical components, for example hydraulic components on the hydraulic block. The large manufacturing volume for the motor block is particularly advantageous, since then the electric motor can provide a higher driving power. In addition, with the solution according to the invention, the motor block can also be made thinner and nevertheless have a larger diameter. Such "disc-shaped" electric motors are particularly advantageous in view of the power that can be achieved thereby.

The arrangement of the control circuit board, which is in particular designed as a printed circuit board, can thus be further optimized with the solution according to the invention. It is particularly advantageous to be able to realize short electrical connections of the electric motor.

The control circuit board is preferably designed as a printed circuit board with printed conductors formed thereon. The substrate of the printed circuit board is preferably plastic or ceramic. Furthermore, the control circuit board is preferably equipped with electrical components, such as switching circuits, capacitors, coils and relays.

A motor sensor is advantageously arranged on the control circuit board according to the invention. The motor sensor is arranged next to the motor block and can therefore also be arranged in particular in the vicinity of the rotor of the associated electric motor. On the one hand, the motor sensor can therefore be arranged directly on the control circuit board and there be contact with it. On the other hand, the motor sensor is located directly on the rotor in order to carry out its measuring function there. Thus, in turn, a particularly short pipeline path and at the same time a short measurement path are provided. The angular position of the rotor and/or its rotational speed are advantageously measured by means of a motor sensor.

Furthermore, according to the invention, at least one motor contact is preferably arranged on the control circuit board, in particular in the region of the motor block. The motor contacts are for contacting an electric motor of an immediately adjacent motor block. The motor contacts are preferably formed by means of metal pins which project from the control circuit board. The term "region" here means in particular the projection surface of the motor block on the control circuit board in the direction of the motor axis of the associated electric motor. The at least one motor contact arranged next to the motor block in this way makes it possible to establish an electrical connection between the two components when the control circuit board and the motor block are mounted or coupled on or connected to one another.

The at least one motor contact is particularly preferably arranged on an edge of the region of the motor block. The motor contacts are then located on the one hand on the outer circumference of the motor block, which is advantageous with regard to the contacting of the electric motor contained therein. On the other hand, the motor contacts are also located on the control circuit board in the outer edge region thereof, where wide conductor tracks for high electric drive currents can advantageously be formed.

Furthermore, at least one plug contact is preferably arranged on the control circuit board, in particular on the side of the motor block adjacent to the region. The at least one plug contact is used to connect the electrical plug to the outside of the control circuit board and thus to the entire hydraulic assembly. The hydraulic assembly is electrically connected to the remainder of the vehicle by an electrical plug. The drive power for the electric motor and for the at least one hydraulic valve is also transmitted from the vehicle to the hydraulic unit, in particular via the electrical plug. In addition, the switching signals and the sensor signals are also transmitted from or to the vehicle via the electrical plug.

Alternatively or additionally, according to an advantageous embodiment of the invention, at least one valve contact is preferably arranged on the control circuit board, in particular on one side, next to the region of the motor block. At least one valve contact is for contacting at least one electro-hydraulic valve. By arranging the valve contacts laterally next to the region of the motor block, the associated hydraulic valves can be contacted laterally outside the motor block. Such contacts and the associated wiring can be produced and installed particularly cost-effectively. Furthermore, in the maintenance work, it is advantageously possible to replace components and in particular individual hydraulic valves.

In particular, at least one valve contact is preferably arranged on each of the two opposite sides of the region of the motor block. The valve contacts are then located on two opposite sides of the control circuit board and both can be electrically connected laterally to the associated coil of the hydraulic valve on the outer side of the motor block. In this embodiment of the invention, the hydraulic valves can be arranged on two opposite sides of the associated hydraulic block. This arrangement of the hydraulic valve on the hydraulic block makes it possible to arrange the hydraulic lines in the hydraulic block in a particularly space-saving manner. The hydraulic block can therefore be made particularly small. This is very advantageous in terms of the manufacturing cost of the hydraulic block. In addition, a particularly space-saving and lightweight structural unit can be provided overall. This is particularly important for components that are installed in a vehicle. Since both a small installation space and a small weight are important factors there.

In particular in such a design, the hydraulic block is therefore advantageously also provided with two opposite sides, so that at least one hydraulic valve is arranged in each case.

The at least one motor contact, plug contact and/or valve contact is preferably designed as a plug contact or a blade terminal contact (schneidkelmkonkt). Such a contact can be produced together in a simple manner when it is mounted on the associated component and moreover offers a high degree of operational reliability during the use of the associated hydraulic unit. They are therefore particularly advantageous here, since with the hydraulic unit according to the invention all components can be connected to one another in particular by simple plug-in mounting. Thus, the components can also be fixedly connected to one another by means of a simple clip connection, which has hitherto only been possible with more expensive screw connections. Furthermore, all electrical contacts can be designed as releasable connections if required, which significantly improves the maintenance and disassembly of the hydraulic unit according to the invention.

The electric motor of the hydraulic unit according to the invention is advantageously designed as a brushless dc motor. Such a direct current motor is also called an EC motor (english: electronically commutated motor). In contrast to this, the brushless dc motor is not based on the principle of action of a dc motor, but is constructed like a three-phase ac synchronous motor with an excitation produced by permanent magnets. The three-phase ac winding is controlled via suitable lines in such a way that a rotating magnetic field is generated, which pulls the permanently excited rotor. The regulation characteristics and the drive power of such a motor can be significantly improved compared to conventional motors.

With conventional vehicle regulating systems, the motor block or drive motor and the control are arranged on opposite sides of the hydraulic block or pump housing. This requires costly contact to the motor block. Therefore, a through hole passing through the hydraulic block and a relatively long electric wire for driving the motor are particularly required. In this case, compensation measures for thermal expansions and a relatively large surface area on the control circuit board or printed circuit board for the supply of the motor are required in particular. This in turn leads to increased power consumption and heat generation.

The arrangement of the control circuit board or printed circuit board in the vicinity of the motor according to the invention provides a number of advantages in contrast. The circuit board layout can therefore be further optimized by short electrical connections of the motor and advantageous positional shifting of the various contacts. The motor diameter can be significantly larger than a conventional motor. Therefore, the performance of the motor can be significantly improved and the power loss can be minimized. An electronically commutated motor can be used particularly advantageously. The rotor position sensor can be arranged directly on the printed circuit board without additional mechanical components. The printed circuit board surface is no longer limited to the size of the hydraulic block. In other words, the housing of the control circuit board can advantageously be formed wider than the motor block and also wider than the hydraulic block. The available printed circuit board surface can therefore be considerably larger. Nevertheless, the overall volume or installation space of the entire assembly can be smaller than is conventional. Furthermore, the printed circuit board of the control circuit board according to the invention can now also be designed as a pure rectangle without milling at the edges. With the inventive design, other fastening means for the individual components can now also be used. In particular, clips and calking can therefore be provided instead of screw connections.

This is achieved in particular by the improved topology of the control circuit board mentioned and the associated arrangement of the motor directly on the printed circuit board of the control circuit board. The arrangement of the control circuit board or printed circuit board directly on the motor preferably forms a hermetically sealed, pre-tested control unit. The coil contacts of the hydraulic valve are advantageously formed on the edge of the circuit board. By means of this optimized arrangement of the hydraulic components, the layout surface of the controller itself is also optimized.

Drawings

Embodiments of the solution according to the invention are explained in detail below with the aid of the accompanying schematic drawings. The figures show:

FIG. 1 is a side view, partially in cross-section, of a hydraulic assembly according to the prior art;

FIG. 2 is a top view of a control circuit board according to the hydraulic assembly shown in FIG. 1;

FIG. 3 is a side view, partially in cross-section, of a hydraulic assembly according to the present invention;

FIG. 4 is a top view of a control circuit board of the hydraulic assembly shown in FIG. 3;

FIG. 5 is an elevation view of the hydraulic assembly shown in FIG. 3; and is

Fig. 6 is a perspective view of the hydraulic assembly according to fig. 3.

Detailed Description

Fig. 1 and 2 show a hydraulic unit 10 according to the prior art with a cylindrical motor block 12. The motor block 12 is arranged on one side of a cuboid hydraulic block 14, on the opposite side of which hydraulic block 14 a cylindrical hydraulic valve 16 is arranged. The coil 18 of the hydraulic valve is visible on the outside of the hydraulic block 14, seen from the side of the hydraulic valve 16. The coils 18 of the hydraulic valve 16 are separate or are part of a controller 20 and are covered by a controller housing 22 of the controller. Furthermore, a control circuit board 24 is provided inside the control housing 22, wherein the control circuit board 24 is arranged on the side of the coil 18 facing away from the hydraulic block 14. Various components (not shown in detail) and various conductor tracks are arranged on the control circuit board 24. Furthermore, a plug connector 26, which is formed by a plurality of plug contacts 28, is provided on the control circuit board 24. As can be seen in particular on the right in fig. 2, the plug contacts 28 project from the control circuit board 24 as contact pins on one side thereof.

A plurality of motor connection lines 30 and coil or valve connection lines 32 are formed on the control circuit board 24. The motor connection 30 extends from the plug connector 26 via the control circuit board 24 and then between the coils 18 and through the hydraulic block 14 to the motor block 12. The valve connecting line 32 is routed from the control circuit board 24 to the coil 18 of the hydraulic valve 16. For connecting the motor connection line 30 and the valve connection line 32, a plurality of motor contacts 34 in the form of contact pins and coil contacts or valve contacts 36 are formed on the control circuit board 24. As can be seen in particular in fig. 2, these contact pins are all located in the region of the interior of the control circuit board 24 due to the resulting wiring of the motor connection line 30 and the valve connection line 32. The contact pins are all located in this case within the so-called region of the motor block 38. This region 38 is defined by the projection of the motor block 12 onto the control circuit board 24 in the direction of the axis of rotation of the associated electric motor.

Fig. 3 to 6 show an exemplary embodiment of a hydraulic unit 10 according to the invention, for which the hydraulic block 14 is also located on the motor block 12. The hydraulic block 14 is located on an end face of the substantially cylindrical or disk-shaped motor block 12, referred to as a first side face 40. The end face of the motor block 12 opposite the first side face 40 is referred to herein as a second side face 42. According to fig. 3 to 6, the second side 42 of the motor block 12 is not open as in fig. 1, but the control circuit board 24 lies on the second side 42 with an extent which is as parallel as possible. As can be seen clearly in fig. 3, 5 and 6, the motor block 12 is therefore surrounded on one of the end faces by the hydraulic block 14 and on the other end face by the control printed circuit board 24.

On the control circuit board 24 thus arranged, the plug contacts 28 of the plug connector 26 are likewise provided on one side. As can be seen clearly in fig. 4, furthermore, a motor contact 34 and a valve contact 36 are formed on the control circuit board. These motor contacts 34 and valve contacts 36 are all located on the edge of the region 38 of the associated motor block 12. In this way, a very short and at the same time easy to install motor connection 30 and valve connection 32 can be achieved. The motor connecting line 30 is guided directly to the outer side of the motor block 12. In the center of the control circuit board 24, a space is thus provided for various components and in particular also for a motor sensor 46 arranged directly on the end face of the motor shaft 44 of the associated electric motor.

The hydraulic valves 16 are located on both sides of the associated hydraulic block 14, i.e. on a first side 48 of the hydraulic block 14 and on a second, opposite side 50 of the hydraulic block 14.

In this way, the associated valve contact 36 can be arranged on the control circuit board 24 on a first side 52 of the region 38 of the motor block 12 and on an opposite second side 54 of the region 38 of the motor block 12. The valve contacts 36 thus located at the edge of the area 38 may advantageously leave a large amount of space in the center of the control circuit board 24 for placement of structural elements and piping pathways.

As can be seen clearly in fig. 6, the valve connecting line 32 leading from the valve contact 36 to the coil 18 is formed by means of a punching grid which is usually (and in contrast to the illustration in fig. 6) provided with a plastic sheathing.

Furthermore, in fig. 6, an opening for inserting a hydraulic pump 56, which is then driven by the motor block 12 arranged on the hydraulic block 14, can also be seen on the side of the hydraulic block 14.

Claims

1. A hydraulic assembly (10) of a slip control mechanism of a hydraulic vehicle brake system, comprising:

-a hydraulic block (14) on which at least one electrically operated hydraulic valve (16) and at least one electrically operated hydraulic pump (56) are arranged;

-a motor block (12) for driving at least one hydraulic pump (56); and

a control circuit board (24) for controlling at least one hydraulic valve (16) and the motor block (12),

wherein the motor block (12) is arranged with its block-shaped first side (40) on the hydraulic block (14),

characterized in that the control circuit board (24) is arranged on the motor block (12) on a second side (42) of the motor block (12) opposite the first side (40).

2. The hydraulic assembly of claim 1, wherein the hydraulic pump is a pump,

characterized in that a motor sensor (46) is arranged on the control circuit board (24).

3. The hydraulic assembly of claim 1 or 2,

characterized in that at least one motor contact (34) is arranged on the control circuit board (24), in particular in a region (38) of the motor block (12).

4. The hydraulic assembly of claim 3,

characterized in that the at least one motor contact (34) is arranged at an edge of a region (38) of the motor block (12).

5. The hydraulic assembly of any one of claims 1 to 4,

characterized in that at least one plug contact (28) is arranged on the control circuit board (24), in particular laterally next to a region (38) of the motor block (12).

6. The hydraulic assembly of any one of claims 1 to 5,

characterized in that at least one valve contact (36) is arranged on the control circuit board (24), in particular laterally next to a region (38) of the motor block (12).

7. The hydraulic assembly of claim 6, wherein the hydraulic pump is a pump,

characterized in that the at least one valve contact (36) is arranged on two opposite sides (52, 54) of the region (38) of the motor block (12).

8. The hydraulic assembly of any one of claims 1 to 7,

characterized in that the hydraulic block (14) is provided with two opposite sides (48, 50) in order to arrange at least one hydraulic valve (16) each.

9. The hydraulic assembly of any one of claims 3 to 8,

characterized in that the at least one motor contact (34), plug contact (28) and/or valve contact (36) is designed as a plug contact or blade terminal contact.

10. The hydraulic assembly of any one of claims 1 to 9,

characterized in that the motor block (12) is provided with an electronically commutated motor.