FR2710699A3 - Motor/pump unit protected from moisture, especially for a motor vehicle antilock braking device - Google Patents

Abstract

The invention relates to a motor/pump unit protected from moisture, especially for a motor vehicle antilock braking device. In this unit, including a part forming a motor (1) and a part forming a pump (2), a control and electrical supply part (3) and a part (5) with valve windings, the parts (1, 3, 5) are located inside a universal casing in the form of a container (4) which is closed, at its open front face, by the part forming a pump (2) which bears axially in a sealed manner. Application especially to improved antilock braking systems for touring cars.

Description

Motor-pump assembly protected from humidity, in particular for a
motor vehicle anti-lock braking
The invention relates to a motor-pump assembly protected from humidity, in particular for an anti-lock braking device of a motor vehicle, containing a motor part preferably arranged in the form of a manifold motor, a pump part, a control and power supply part as well as a valve coil part.

A known anti-lock braking device for a motor vehicle is arranged such that the engine part as well as the power control part and the valve coil part each have their own housing; to the pump part arranged in the form of a cast iron block comprising pump pushers mounted in an adaptation seat, are connected by flanges, on the one hand, axially the motor part and, in a plane parallel to this part, a valve part equipped with coils which actuate the valves. The motor part penetrates, by the extended shaft of its rotor, which is equipped with an eccentric, in the pump part and drives, in this place, the pushers of the pump to pressurize a hydraulic liquid, which is sent in a controlled manner, via the valves of the valve part, to the brakes of the drive wheels. The electronic unit intended to house electrical and electronic components for controlling all the electrical functions on the one hand of the motor part and on the other hand of the valve coils is arranged on the front face of the pump part, which is turned away from the engine part.

The control and power supply lines extend outside the different parts and emerge from the respective housings or enter them respectively through bushings to be sealed separately.

 In another anti-lock braking device for motor vehicles (EP-B1-O 509 883), it must be assumed that the control part which is absolutely necessary for the operation of the device is placed outside the motorcycle assembly -pump protected from humidity.

 In accordance with the problem underlying the present invention, the technical manufacturing and mounting expenditure for a motor-pump assembly protected from humidity, in particular an anti-lock braking device for a motor vehicle, must be reduced, while maintaining the tightness against humidity, especially in relation to live parts.

This problem is solved, in accordance with the invention, by means of the following characteristics: a) the motor part, the power supply control part
as well as the valve coil part are arranged inside a
general housing, preferably pot-shaped; b) the general housing is closed on its open front face, by the part forming
pump which is applied axially tightly.

 According to another characteristic of the invention, a printed circuit board of the control and power supply part used to house electrical or electronic components as well as a brush holder plate used to house brushes of a motor with a planned collector. as a motor part, are located in a plane and preferably joined in one piece.

 According to another characteristic of the invention, the power supply and control lines between the control and power supply part, on the one hand, and the engine part or the valve coil part, on the other hand hand, extend inside the general housing; and the general housing is provided with a terminal for an external electrical control supply line.

 According to another characteristic of the invention, the general or universal housing is made in the form of a pot and is applied, at its edge, in a sealed manner against the pump-forming part, by means of the interposition of a lining. seal that can be previously mounted at the edge.

 According to another characteristic of the invention, the casing of the motor part is made in the form of a pot and penetrates, by its support collar molded in the bottom of the pot, into the pump part arranged axially forward; and the rotor shaft of the motor part, which is equipped with an eccentric for driving the pushers of the pump part is correspondingly extended, and is supported in the support collar.

 According to another characteristic of the invention, the motor casing of the motor part is open frontally, in particular in the form of a cylinder, and is retained by one of its front faces, in or on the pump part ; and the rotor shaft of the rotor part, which is equipped with an eccentric for driving pushers of the pump part, is journalled directly in the pump part.

 According to another characteristic of the invention, the manifold of the manifold motor provided as part of the motor, is arranged in the vicinity of the front face of the motor housing, turned away from the part forming the pump; and the brush-holder plate of the collector motor or the printed circuit board of the control and power supply part are arranged in the vicinity of the front face of the motor casing, facing away from the pump-forming part.

 According to another characteristic of the invention, the collector of the collector motor provided as part of the motor is arranged in the vicinity of the front face of the motor housing, which faces the pump part; and the brush-holder plate of the collector motor or the printed circuit board of the control or power supply part is arranged in the vicinity of the front face of the motor housing, facing the pump-forming part.

 According to another characteristic of the invention, the valve coil part is arranged radially between the motor housing, on the one hand, and the universal housing, on the other hand, in the vicinity of the front face, located on the motor side, of the pump part.

 According to another characteristic of the invention, the valve coil part is arranged essentially concentrically with respect to the motor part, being distributed around its periphery, in a radial intermediate space between the motor casing and the universal housing.

 According to another characteristic of the invention, the valve coil part is mounted eccentrically on one side of the motor part in a radial intermediate space between the motor casing and the universal housing.

 According to another characteristic of the invention, the valve coils of the valve coil part are in contact with the printed circuit board or with components arranged on this board, by means of electrical terminals, which extend in the radial cavity located between the casing of the motor part on the one hand and the universal housing on the other hand.

 According to another characteristic of the invention, the valve coils of the valve coil part are in direct contact with the printed circuit board.

 By integrating, in accordance with the invention, the drive motor for the pump part, as well as the control and supply part and the valve coil part in a single housing and while saving several housing elements to be manufactured and mounted, the sealing system is reduced to only a sealing plane between the universal housing, on the one hand, and the pump part, on the other hand, and all control lines and d 'power supply can be arranged inside the universal housing, without the use of separate bushing to be sealed; the expense for the installation and wiring of the control and power supply parts can be advantageously reduced further by the fact that, in accordance with one embodiment of the invention, the printed circuit board of the part control or supply, as well as the brush holder plate used to house the brushes of the collector motor intended as a motor, are located in a plane and are preferably assembled in one piece. When, according to another embodiment of the invention, the collector of the collector motor, which drives the pushers of the pump part, is arranged on the end of the rotor shaft, facing the pump part, the valve coils, which are preferably arranged on the front face of the pump part, facing the manifold motor, are fitted directly on the combined plate forming a printed circuit board and brush holder plate and are in contact with this plate, which is disposed in the area of application of the motor part against the pump part mounted axially in front.

Other characteristics and advantages of the present invention will emerge from the description given below taken with reference to the appended drawings, in which:
- Figure 1 shows, in the form of a longitudinal axial section, a first embodiment of an anti-lock braking device of a motor vehicle, according to the invention;
- Figure 2 is a section of the device of Figure 1, at the valve coil portion;
- Figure 3 shows, in the form of a longitudinal axial section, a second embodiment of an anti-lock braking device of a motor vehicle according to the invention;
- Figure 4 shows a section of the device of Figure 3, at the valve coil part;
- Figure 5 shows, in the form of a longitudinal axial section, a third embodiment of an anti-lock braking device of a motor vehicle, according to the invention; and
- Figure 6 is a section of the device of Figure 5, at the valve coil part.

 The construction unit, which is shown in the exemplary embodiments of FIGS. 1, 3, 5, of an anti-lock braking device of motor vehicles according to the invention is protected from humidity, with respect to outside, by a universal box 4 in the form of a pot, which is applied in a sealed manner, at its edge, against a pump forming part 2, in the form of a block of cast iron, with interposition of 'A peripheral seal 6, which can be advantageously inserted in the preassembled state on the edge of the pot.

In the pump forming part 2 are retained, according to an adjusted assembly, pump pushers 2.1, 2.2, which are driven by means of an eccentric 1.21 of the shaft 1.2, which enters the pump forming part 2 and is correspondingly extended from the rotor of a manifold motor provided as part of motor 1.

In accordance with a first exemplary embodiment according to the invention, which is shown in FIGS. 1, 2, the engine part 1 comprises a casing 1.1 in the form of an engine pot, and in the bottom of the pot, which is turned towards the pump part 2, a support collar 1.12 is molded which projects axially and which, by means of ball bearings 1.22 and 1.23, between which an eccentric 1.21 is inserted, serves to support only the shaft 1.2 of the rotor, on the one hand, and to receive the motor part 1 in the pump part 2. Magnets in the form of partial shells 1.3 serving to excite
The winding of the rotor, which is arranged on the shaft 1.2 of the rotor in the form of a package of rotor sheets, are fixed to the inner periphery of the casing 1.1 of the engine. The rotor winding is connected to a collector 1.5, on which brushes 1.41 slide, which are retained on a brush holder plate 1.4.

 The brush holder plate 1.4 is made in one piece with and is located in the same plane as a printed circuit board 3.2 of a control and supply part 3, which is connected to the front face of the motor part 1, which is turned away from the pump part 2; advantageously, the components 3.1 of the control and supply part 3 are retained on the printed circuit board 3.2, advantageously produced in one piece with the brush holder plate 1.4, and are in contact with this board.

 A part 5 with valve coils is, on the one hand, advantageously disposed in the vicinity of the area of application of the motor part 1 against the pump part 2 and has, on the other hand, valve coils 5.1, which are distributed on the periphery of the engine part, in the radial cavity present between the casing 1.1 of the engine and the universal housing 4 and which actuates the pushers 5.3 of the valves, by means of which respectively two inlets of brake line are actuated, for each drive wheel - in a manner not shown here in more detail. The valve coils 5.1 are connected directly, via terminals 5.2, to the printed circuit board 3.2 or to the components 3.1 which are fixed on this board. The supply with an external connection line takes place via a connector 4.1, which is preferably integrated in one piece with the universal housing 4, in the vicinity of the control and supply part 3 .

 FIG. 3 illustrates, in the case of an otherwise identical construction in principle, a further reduction in the expenditure on components, given that for the engine part 1, only an engine casing 1.1 is provided, which has the form of an envelope, in particular cylindrical, and has open front faces, and there is provision for direct turning of the shaft 1.2 of the rotor in a corresponding adaptation opening of the pump-shaped part in the form of a block 2, by l 'intermediate ball bearings 1.23 and 1.22, which are retained directly in this part. According to another variant of the embodiment of FIG. 1.2, and this in a manner adapted to different mounting conditions, the unit 5 with valve coils, equipped with valve lifters 5.3 controlled by the valve coils 5.1, is arranged on one side of the motor part 1, in an eccentric manner with respect to the latter.

 Figures 5, 6 show, in accordance with a more simplified and compact embodiment from the point of view of construction and manufacturing technique, an exemplary embodiment according to the invention, in which the collector 1.5 of the collector motor provided as part forming motor 1 is disposed in the vicinity of the front face of the casing 1.1 of the motor, which faces the pump part 2, and the brush holder plate 1.4 of the manifold 1.5 and the printed circuit board 3.2 of the control part and supply 3 are arranged in the vicinity of the front face of the motor casing 1.1, facing the pump part 2, so that the valve coils 5.1 of the valve coil unit can be retained directly on the plate with printed circuits 3.2 and be in contact with the latter, without the need for special lines inside the universal housing 4. The valve coils 5 .1 of the part 5 with valve coils are, in this case, distributed again concentrically on the periphery of the casing 1.1 of the engine, but also in this embodiment, for example in accordance with FIGS. 3, 4, can be arranged d 'one side with respect to the engine casing 1.1. In the same way, contrary to the representation of FIG. 5, it is naturally also possible to provide for a journalling of the shaft 1.2 of the rotor by means of a support collar 1.12 molded on the casing 1.1 of the engine.

 Although, in the exemplary embodiments, the universal housing is made of a pot in one piece, one can also provide a cover which, in the case of a repair can be removed to allow better accessibility to the electronic system control and supply, in the vicinity of the control and supply part, without having to do without, therefore, an advantageous reduction, according to the invention, the expenditure in components and the expense of mounting as well as advantageous wiring inside the housing.

Claims (13)

 1. Motor-pump assembly protected from humidity, in particular for an anti-lock braking device of a motor vehicle, comprising a motor part (1) preferably arranged in the form of a manifold motor, a part forming pump (2), a control and electrical supply part (3) as well as a part (5) with valve coils, characterized in that a) the motor part (1), the control part d power supply  (3) as well as the part (5) with valve coils are arranged inside  a universal or general housing (4), preferably in the form of a pot; b) the universal housing (4) is closed on its open front face, by the part  forming a pump (2) which is applied axially in a sealed manner.  2. Motor-pump assembly protected from humidity according to claim 1, characterized in that c) a printed circuit board (3.2) of the control part and  power supply (3) for housing electrical components, or  electronics (3.1) as well as a brush holder plate (1.4) used to house  brushes (1.4) of a collector motor provided as a motor part  are located in a plane and preferably joined in one piece.  3. Motor-pump assembly protected from humidity according to claim 2, characterized in that d) the power supply and control lines between the part of  control and power supply (1), on the one hand, and the part forming  motor (1) or the part (5) with valve coils, on the other hand, extend to  the interior of the universal housing (4); e) the universal housing (4) is provided with a terminal (4.1) for an external line  electric control supply.  4. motor-pump assembly protected from humidity according to any one of claims 1 to 3, characterized in that f) the universal housing (4) is made in the form of a pot and is applied at  its edge, in a sealed manner, against the pump-forming part (2),  by interposing a seal (6) which can be  previously mounted at the edge.  5. Motor-pump assembly protected from humidity according to any one of claims 1 to 3, characterized in that g) the casing (1.1) of the motor part (1) is made in the form of a pot and  penetrates, by its support collar (1.12) molded in the bottom of the pot, in the  pump part (2) disposed axially forward; h) the shaft (1.2) of the rotor of the engine part (1), which is equipped with a  eccentric (1.21) for driving pushers (2.1) of the forming part  pump (2), is extended accordingly, and is supported in the  support collar (1.12).  6. motor-pump assembly protected from humidity according to any one of claims 1 to 3, characterized in that i) the casing (1.1) of the engine of the engine part (1à is open  frontally, in particular in the form of a cylinder, and is retained by one  from its front faces, in or on the pump part (2); j) the shaft (1.2) of the rotor of the rotor part (1), which is equipped with a  eccentric (1.21) for driving pushers (2.21) of the forming part  pump (2), is journalled directly in the pump part (2).  7. motor-pump assembly protected from humidity according to any one of claims 1 to 6, characterized in that k) the collector (1.5) of the collector motor provided as part forming  motor (1), is arranged in the vicinity of the front face of the casing (1.1) of the  motor, turned away from the pump part (2); I) the brush holder plate (1.4) of the collector motor or the circuit board  printed (3.2) of the control and power supply part (3) are  arranged in the vicinity of the front face of the engine casing (1.1), turned  opposite the pump part (2).  8. Motor-pump assembly protected from humidity according to any one of claims 1 to 7, characterized in that m) the collector (1.5) of the collector motor provided as part forming  motor (1) is arranged in the vicinity of the front face of the casing (1.1) of the  motor, which is turned towards the pump part (2); n) the brush holder plate (1.4) of the collector motor or the circuit board  printed (3.2) of the control or power supply part (3) is  arranged in the vicinity of the front face of the engine casing (1.1), turned  towards the pump part (2).  9. Motor-pump assembly protected from humidity according to any one of claims 1 to 8, characterized in that o) the part (5) with valve coils is arranged radially between the casing  (1.1) on the one hand, and the universal housing (4), on the other hand,  near the front face, located on the motor side, of the pump part  (2).  10. Motor-pump assembly protected from humidity according to claim 9, characterized in that p) the part (5) with valve coils is arranged essentially  concentrically with respect to the motor part (1), being distributed  on its periphery, in a radial intermediate space between the casing (1.1) of the  motor and the universal housing (4).  11. motor-pump assembly protected from humidity according to claim 9, characterized in that q) the part (5) with valve coils is mounted eccentrically on one side  of the motor part (1), in a radial intermediate space between the  motor housing (1.1) and the universal housing (4).  12. Motor-pump assembly protected from humidity according to claim 7, characterized in that r) the valve coils (5.1) of the part (5) with valve coils are in  contact with printed circuit board (3.2) or with components  (3.1) arranged on this plate, via electrical terminals  (5.2), which extend into the radial cavity located between the housing (1.1) of the  motor part (1) on the one hand and the universal housing (4) on the other.  13. motor-pump assembly protected from humidity according to claim 8, characterized in that s) the valve coils (5.1) of the part (5) with valve coils are in  direct contact with the printed circuit board (3.2.)