FR3105137A1 - KIT FOR MANUFACTURING A MOTOR-REDUCED MOTOR VEHICLE BRAKE ASSEMBLY - Google Patents

Abstract

The invention relates to a kit (100) for manufacturing a motor vehicle brake geared assembly, comprising: - an electric motor (11) extending along a motor axis (15) between a first end (16) and a second end (17), - a transmission module (12) intended on the one hand to be coupled to a mechanical actuator carried by a brake body, and on the other hand designed to be coupled to the first end of the electric motor , - a motor housing (13) housing the second end of the electric motor, and - a transmission housing (14) on the one hand intended to be attached and fixed to the brake body and on the other hand housing the control module. transmission, the engine and transmission housings being further adapted to fit together by inserting, along the motor axis, the first end of the electric motor inside the transmission housing, so as to couple the electric motor to the transmission module and to obtain the gear motor assembly. Figure for the abstract: Figure 1

Description

KIT FOR MANUFACTURING A GEAR MOTOR ASSEMBLY FOR A MOTOR VEHICLE BRAKE

The invention relates to a kit for manufacturing a geared motor assembly for a motor vehicle brake.

Conventionally, a disc brake for a motor vehicle comprises a disc mounted integral in rotation with a wheel of the motor vehicle around a wheel axle, a yoke mounted fixed relative to the chassis of the motor vehicle, two braking pads slidably mounted in the yoke, on either side of the disc, as well as a so-called floating or even sliding caliper, which is slidably mounted relative to the yoke and which controls the clamping of the braking pads against opposite faces of the disc , oriented perpendicular to the wheel axis, during a braking operation.

This stirrup comprises a molded body provided with a base, an arch extending the base and a plurality of fingers extending the arch facing the base. The arch goes around the disc, while the base and the fingers are located on either side of the disc, each facing one of the braking pads.

The base also carries a piston which is provided on the one hand to drive the braking pad which is associated with it in sliding towards the disc, and on the other hand to drive, by reaction, the caliper in sliding in an opposite direction. , so that the caliper itself drives, by means of its fingers, the other braking pad by sliding towards the disc. In this way, the mechanical piston squeezes the brake pads together and presses them against opposite sides of the disc. The braking pads thus make it possible, by friction against the opposite faces of the disc, to reduce the speed of rotation of the wheel and therefore to brake the motor vehicle.

The piston is for example actuated hydraulically.

It is also known to provide such a disc brake with a geared motor assembly which is provided for mechanically actuating the piston, in particular during a parking operation.

This geared motor assembly includes a casing attached to the base of the stirrup body. The box is provided with a molded body, in particular by injection, in which are housed a transmission module and an electric motor, and covers to close the body of the box. The electric motor is coupled to the transmission module which is itself coupled to the piston, in particular via a movement transformation mechanism, so as to ensure the sliding drive of the braking pads. The body further provides an electrical connector for supplying the electric motor with electrical energy.

Such an example of a geared motor assembly is for example described in document FR 3045754 A1 in the name of the Applicant.

However, such a geared motor assembly is only slightly adaptable depending on the motor vehicle models. Indeed, a dedicated box must necessarily be designed for each model of motor vehicle, in particular taking into account the space available on this model of motor vehicle for the disc brake, or even the dimensioning of the electric motor for this model of vehicle. automobile. The accessibility of the electrical connector for supplying the electric motor with electrical energy can also condition the design of the box.

This lack of adaptability therefore complicates the integration of geared motor assemblies in disc brakes. This also translates into an additional cost for manufacturing geared motor assemblies of various designs.

In addition, depending on the design chosen for the housing of the geared motor assembly, the manufacture of the body of the housing, in particular by injection molding, can prove to be particularly complex to implement.

These same difficulties are found in the case of geared motor assemblies for motor vehicle drum brakes.

The object of the invention is to overcome the drawbacks described above, in particular by proposing a kit for manufacturing a motor vehicle brake gear motor assembly comprising a motor housing and a transmission housing which respectively house an electric motor and a transmission and which are designed to be assembled together.

More specifically, the subject of the invention is a kit for manufacturing a motor vehicle brake gear motor assembly, comprising:
- an electric motor extending along a motor axis between a first end and a second end,
- a transmission module intended on the one hand to be coupled to a mechanical actuator carried by a body of the brake, and designed on the other hand to be coupled to the first end of the electric motor,

According to the invention, the kit further comprises a motor housing housing the second end of the electric motor and a transmission housing on the one hand intended to be attached and fixed to the brake body and on the other hand housing the transmission module , the motor and transmission housings being further designed to be assembled together by inserting, along the motor axis, the first end of the electric motor inside the transmission housing, so as to couple the electric motor to the transmission module and to obtain the geared motor assembly.

According to variant embodiments which can be taken together or separately:
- the motor housing and the transmission housing are designed to fit together by elastic interlocking;
- the motor housing and the transmission housing are designed to be assembled together by shrink fitting, by screwing, by welding, or by gluing;
- the motor housing comprises a hollow body extending around the motor axis and accommodating the second end of the electric motor, a first end of the body of the motor housing following the motor axis being designed to engage with the transmission housing, so as to assemble the motor housing and the transmission housing together;
- the first end of the motor housing body is designed to fit, together with the first end of the electric motor, inside the transmission housing;
- the motor housing comprises an electrical connector protruding radially, with respect to the motor axis, from the body of the motor housing;
- the motor housing carries an indexing stud;
- the transmission housing comprises a plurality of notches distributed around the motor shaft and designed to selectively engage with the indexing pin after the assembly of the motor and transmission housings by insertion of the first end of the electric motor inside the transmission housing;
- the transmission housing comprises a hollow body comprising one or more first walls arranged parallel to the motor axis, when the motor housing and the transmission housing are assembled together, and delimiting a first housing of complementary shape with the first end electric motor;
- the first wall(s) extend, along the motor axis, between a first and a second end, when the motor housing and the transmission housing are assembled together, and
- the second end of the first wall(s) delimits an access opening to the first housing through which the first end of the electric motor is able to be inserted into the first housing of the transmission box along the axis of engine;
- the transmission housing and the motor housing are respectively provided with a first and a second elastic fitting member which are designed to fit elastically into each other;
- the first elastic interlocking member comprises at least one recess hollowed out, at the level of the first end of the first wall or walls, globally radially, with respect to the motor shaft in a surface of the first wall or walls, when the motor and transmission housings are assembled together;
- the second elastic interlocking member comprises one or more lugs which are elastically deformable and which extend, generally parallel to the motor shaft, from the first end of the body of the motor housing;
- the or each of the lugs further having a projection extending, from a free end of said lug, generally radially with respect to the motor shaft and designed to engage in the or one of the recesses formed in the or the first walls of the transmission housing, when the engine and transmission housings are assembled together;
- The surface of the first wall or walls in which the recess or recesses are dug is arranged facing the first housing;
- the projection of the or each of the legs is oriented towards the motor shaft;
- the kit comprises an elastically deformable damping member, which is designed to be interposed between and in contact with, along the axis of the motor, the electric motor on the one hand and the transmission housing on the other hand, when the housings engine and transmission are assembled together;
- The engine and transmission housings are made by molding a plastic material, in particular by injection molding a plastic material.

The invention also relates to a motor housing for a kit as previously described.

Another subject of the invention is a transmission box for a kit as previously described.

The invention also relates to a method for manufacturing a geared motor assembly from the kit described above, comprising a step during which the motor and transmission housings are assembled to each other by insertion, according to the motor axis, from the first end of the electric motor inside the transmission housing, so as to couple the electric motor to the transmission module and to obtain the geared motor assembly.

The invention also relates to a motor vehicle brake gear motor assembly obtained by manufacturing a kit as described above or by implementing the manufacturing method described above.

Another subject of the invention is a motor vehicle brake comprising a brake body, friction means and a geared motor assembly as previously described, the geared motor assembly being attached and fixed to said brake body.

The brake is for example a disc brake, the brake body being a caliper body. Alternatively, the brake is a drum brake, the brake body being a plate.

Other aspects, aims, advantages and characteristics of the invention will appear better on reading the following detailed description of preferred embodiments thereof, given by way of non-limiting example, and made with reference to the appended drawings. on which ones:

is a perspective view of a kit for making a geared motor assembly according to one embodiment of the invention;

is a perspective view of the gearmotor assembly obtained by manufacturing from the kit shown in Figure 1;

is a perspective view of the gearmotor assembly shown in Figure 2, with the interior of the gearmotor assembly shown;

is a perspective view of an example of a motor vehicle brake carrying the geared motor assembly shown in Figures 2 and 3;

is a perspective view of another example of a motor vehicle brake carrying the geared motor assembly shown in Figures 2 and 3.

Figure 1 shows a kit 100 for manufacturing a geared motor assembly 10 of a motor vehicle brake 200A, 200B, according to one embodiment of the invention. Figures 2 and 3 show the geared motor assembly 10 obtained by manufacturing from the kit 100.

The kit 100 and the geared motor assembly 10 are both suitable for a 200A disc brake and for a motor vehicle 200B drum brake, the characteristics and operation of which are briefly recalled below.

An example of a disc brake 200A is represented in FIG. 4. The disc brake 200A comprises a disc intended to be mounted integral in rotation with a wheel of the motor vehicle around a wheel axle, a yoke intended to be mounted fixed relative to a chassis of the motor vehicle, two braking pads mounted to slide in the yoke along a sliding axis, parallel to the wheel axis, and arranged on either side of the disc, as well as a caliper called " floating" or "sliding" which is slidably mounted relative to the yoke and which controls the clamping of the brake pads against opposite faces of the disc, oriented perpendicular to the wheel axle, during a braking operation. The braking pads form friction means.

The stirrup comprises a molded body provided with a base, an arch extending the base and a plurality of fingers, for example two fingers, extending the arch facing the base. The arch goes around the disc, while the base and the fingers are located on either side of the disc, each facing one of the braking pads.

The base also carries a hydraulic actuator as well as a mechanical actuator comprising in particular a piston, each of which is designed on the one hand to drive the braking pad which is associated with them sliding towards the disc, and on the other hand to drive , by reaction, the caliper sliding in an opposite direction, so that the caliper itself drives, by means of its fingers, the other sliding brake pad towards the disc.

In this way, the mechanical actuator squeezes the brake pads together and presses them against opposite sides of the disc. The braking pads thus make it possible, by friction against the opposite faces of the disc, to reduce the speed of rotation of the wheel and therefore to brake the motor vehicle.

The hydraulic actuator serves, for example, as a service brake, while the mechanical actuator serves as a parking or emergency brake.

An example of a drum brake 200B is represented in FIG. 5. The drum brake 200B comprises a drum intended to be mounted integral in rotation with a wheel of the motor vehicle around a wheel axle and comprising a cylindrical annular skirt s 'extending around the wheel axis, a body, called plate, intended to be mounted fixed relative to a chassis of the motor vehicle, and two braking shoes in the form of an arc of circle which are centered on the axis of wheel and which are carried by the plate. The brake shoes are arranged radially inside and facing the drum skirt. The brake shoes form friction means.

The drum brake 200B further comprises a hydraulic actuator, called wheel cylinder, with which the first ends of the brake shoes bear along an axis transverse to the wheel axis, as well as a mechanical actuator with which second ends of the brake shoes bear along an axis transverse to the wheel axis. The wheel cylinder and the mechanical actuator are both carried by the plate.

The wheel cylinder is designed to transversely push each of the first ends of the brake shoes relative to each other in an opposite direction, so as to cause the separation of the first ends of the brake shoes and thus to move the brake shoes towards the skirt of the drum until they are applied to said skirt. The brake shoes thus make it possible, by friction against the skirt of the drum, to reduce the speed of rotation of the wheel and thus to brake the motor vehicle. The wheel cylinder is intended to be actuated when using the 200B drum brake in a so-called “simplex” operating mode which corresponds for example to use as a service brake.

The mechanical actuator is intended to be actuated when using the 200B drum brake in a so-called “duo-servo” operating mode which corresponds for example to use as a parking or emergency brake. This “duo-servo” mode of operation in fact allows powerful braking resulting in very rapid locking of the wheels of the motor vehicle. The mechanical actuator can be operated at the same time as the wheel cylinder. In this "duo-servo" mode of operation, the bearing faces of the mechanical actuator slide transversely relative to the plate, in an opposite direction, by means of a piston which carries these bearing faces, so as to separating the second ends of the brake shoes from each other and pressing the brake shoes against the skirt of the drum. The brake shoes thus ensure the locking of the wheel of the motor vehicle.

According to the invention, the kit 100 comprises an electric motor 11, a transmission module 12, as well as a motor housing 13 and a transmission housing 14 intended to be attached and fixed, in particular by means of one or several screws or bolted assemblies (not shown), on the body of the brake, that is to say the body of the caliper of the disc brake 200A or the plate of the drum brake 200B.

The electric motor 11 extends along a motor axis 15 between a first end 16 and a second end 17.

The transmission module 12 is intended on the one hand to be coupled to the mechanical actuator carried by the brake body. For this, the mechanical actuator comprises for example a motion transformation mechanism (not shown) which is capable of transforming a rotational movement which is transmitted by the transmission module 12 to said mechanism into a translational movement which is transmitted by said mechanical actuator piston mechanism.

The transmission module 12 is designed on the other hand to be coupled to the first end 16 of the electric motor 11.

The motor housing 13 houses the second end 17 of the electric motor 11, while the transmission housing 14 houses the transmission module 12.

The motor housing 13 and the transmission housing 14 are further designed to be assembled together by insertion, along the axis of the motor 15, of the first end 16 of the electric motor 11 inside of the transmission box 14, so as to couple the electric motor 11 to the transmission module 12 and to obtain the geared motor assembly 10 (FIG. 3).

In this way, the geared motor assembly 10 is obtained by assembling two distinct or even separate housings, the motor housing 13 which houses the electric motor 11 and the transmission housing 14 which houses the transmission module 12.

This therefore allows greater adaptability of the geared motor assembly 10 depending on the model of motor vehicle, the motor housing 13 and the transmission housing 14 being able to be modified separately from each other, without this impacting needed the other of the enclosures.

This further simplifies the design of each of the two motor 13 and transmission 14 housings, which can be made independently of that of the other housing except for their assembly. It is moreover easier to design the motor 13 and transmission 14 casings with a view to manufacture by molding, and all the more so with a view to manufacture by injection molding.

The electric motor 11 has for example a body 18, in the form of a cylinder of revolution, extending along the axis of the motor 15 between the first and the second end 16, 17 (FIGS. 1 and 2). The motor axis 15 is for example intended to be oriented perpendicular to the wheel axis.

The body 18 of the electric motor 11 comprises, at the first end 16, an output shaft 19 rotating around the axis of the motor 15 with respect to the body 18. The output shaft 19 is designed to be mounted integral in rotation with an input pinion 20 of the transmission module 12 around the motor axis 15, when the motor 13 and transmission 14 casings are assembled together, for example by ultrasonic welding, by laser welding, by gluing or similar.

The body 18 of the electric motor 11 further comprises, at the second end 17, one or more electrical connection lugs 21 (FIG. 3). The connection lug(s) 21 extend for example parallel to the motor axis 15.

The motor housing 13 comprises a hollow cylindrical body 22 extending around the motor shaft 15 and housing the second end 17 of the electric motor 11.

The body 22 of the motor housing 13 comprises a side wall 23 extending around the motor shaft 15 and having an outer surface 231 opposite an inner surface 232 defining a housing 233 receiving the second end 17 of the electric motor 11 ( figure 3).

A first end 24 of the body 22 of the motor housing 13, in particular of the side wall 23, along the axis of the motor 15 is designed to cooperate or even engage with the transmission housing 14, so as to assemble the motor 13 and transmission housing 14 together.

The first end 24 of the body 22 of the motor housing 13 is for example designed to be inserted inside the transmission housing 14 (FIG. 3).

Housing 233 of motor housing 13 is also closed, at a second 24 of the ends of body 22 of motor housing 13 along motor axis 15, by a bottom wall 26.

The motor housing 13 also comprises an electrical connector 28 projecting radially, with respect to the motor shaft 15, from the body 22 of the motor housing 13, in particular from the second end 25 of the body 22 of the motor housing 13. The electrical connector 28 is intended to be electrically connected to an electric generator (not shown), so as to supply the electric motor 11 with electric current.

The assembly of the motor housing 13 and the transmission housing 14 also makes it possible to adapt the angular orientation of the electrical connector 28 of the motor housing 13, around the motor axis 15, depending on the motor vehicle model. The same design of engine 13 and transmission 14 casings can thus be adaptable to several motor vehicle models.

The electrical connector 28 for example itself comprises a body 29 and an electrical lead frame 30 (FIG. 3).

Body 29 of electrical connector 28 is integral with body 22 of motor housing 13 and projects radially, relative to motor shaft 15, from body 22 of motor housing 13.

The lead frame 30 has one or more first end portions 31 which are electrically connected to the electric motor 11, in particular to the connection pad(s) 21 of the electric motor 11, a central portion 32 which extends the first portion(s) of end 31 and which is housed in the body 29 of the electrical connector 28, as well as one or more second end portions 33 which extend the central portion 32, in particular opposite the first end portion(s) 31 , and which protrude from the body 29 of the electrical connector 28. The second end portion or portions 33 of the lead frame 30 are intended to be electrically connected to the electric generator to supply the electric motor with electric current.

The body 29 of the electrical connector 28 comprises for example a first portion 34 which extends radially, with respect to the axis of the motor 15, from the body 22 of the motor casing 13 and which houses the lead frame 30, in particular its central portion 32. The first portion 34 of the body 29 of the electrical connector 28 is further extended by a second portion 35 extending generally parallel to the motor shaft 15. The second portion 35 has for example a hollow cylindrical shape at the inside which the lead frame 30, in particular the second end portion(s) 33 of the lead frame 30, protrudes, generally parallel to the motor axis 15, from the first portion 34.

The motor housing 13 is for example made by molding a plastic material, in particular by injection molding a plastic material.

Advantageously, the orientation of the electric motor 11 relative to the motor housing 13 around the motor axis 15 is fixed, and it is the assembly formed by the motor housing 13 and the electric motor 11 which is oriented by relative to the gearbox 14 around the motor axis 15.

The motor housing 13 and the transmission housing 14 include, for example, indexing means 36, 37 designed to index the angular orientation, around the motor axis 15, of the electrical connector 28 of the motor housing 13.

For this, the motor housing 13 carries, for example, an indexing stud 36 and the transmission housing 14 comprises a plurality of notches 37 distributed around the motor shaft 15 and designed to selectively engage with the indexing stud. indexing 36 after assembly of the motor 13 and transmission 14 casings by inserting the first end 16 of the electric motor 11 inside the transmission casing 14 (FIG. 2).

In this way, depending on the notches 37 with which the indexing stud 36 is engaged, the electrical connector 28 of the motor housing 13 has a different angular orientation, around the motor shaft 15. indexing 36 and the notches 37 thus make it possible to index and therefore to fix possible angular orientations for the electrical connector 28. This simplifies the manufacture of the kit 100.

The notches 37 are for example regularly distributed around the motor shaft 15, the notches 37 being formed in the motor housing 13 over its entire circumference around the motor shaft 15. Alternatively (not shown), the notches 37 are regularly distributed over an angular section, strictly less than 360°, around the motor shaft 15, the notches 37 being formed in the motor housing 13 over only part of its circumference around the motor shaft 15 .

The indexing stud 36 is for example carried by the side wall 23 of the body 22 of the motor housing 13, in particular by its outer surface 231, at the level of the first end 24 of the motor housing 13.

Alternatively (not shown), the indexing stud 36 is carried by the transmission housing 14 and the notches 37 are formed in the motor housing 13.

The transmission module 12 comprises for example a train of gears 20, 38, 39, 40 itself comprising the input pinion 20, an input gear 38 which is meshed with the teeth of the input pinion 20, one or more intermediate gears 39 succeeding one another from the input gear 38 and an output epicyclic gear train 40 which is intended to be coupled to the mechanical actuator, in particular via the movement transformation mechanism (FIG. 3).

The input pinion 20 is designed to be integral in rotation with the output shaft 19 of the electric motor 11 around the motor axis 15, when the motor 13 and transmission 14 housings are assembled one to the other. 'other.

Each of the gears 38, 39 of the transmission module 12 is rotatably mounted, with respect to the transmission housing 14, around an axis of rotation 41, 42 parallel to the axis of the motor 15, when the motor housings 13 and transmission 14 are assembled together.

Input gear 38 and intermediate gear 39 are stepped. They each comprise a pinion 38a and a toothed wheel 38b, 39b mounted integral in rotation with the pinion 38a, relative to the transmission case 14, around the axis of rotation 41, 42 of the associated stepped gear 38, 39.

The toothing of the toothed wheel 38b of the input gear 38 is meshed with the toothing of the input pinion 20 of the electric motor 11, when the motor 13 and transmission 14 housings are assembled together . The teeth of the toothed wheel 39b of the intermediate gear 39 are in turn meshed with the teeth of the pinion 38a of the input gear 38.

The output epicyclic gear train 40 comprises a plurality of satellites 40a whose teeth mesh with the teeth of the pinion (not shown) of the intermediate gear 39, thus forming a sun gear. The satellites 40a are further carried by a planet carrier 40b relative to which they are rotatably mounted around axes of rotation (not shown) parallel to the axis of the motor 15, when the motor 13 and transmission 14 housings are assembled l to each other. The planet carrier 40b is itself rotatably mounted, with respect to the transmission case 14, around the same axis of rotation 42 as the intermediate gear 39 with which the planet wheels 40a cooperate.

The satellite carrier 40b is also fixed in rotation to a coupling member 40c via which the transmission module 12 is intended to be coupled to the mechanical actuator, in particular via the movement transformation mechanism.

The teeth of the input pinion 20 and of the toothed wheel 38b of the input gear 38 are for example helical.

The teeth of the pinion 38a of the input gear 38, of the pinion 39 and of the toothed wheel 39b of the intermediate gear 39 as well as of the satellites 40a of the epicyclic gear train 40 are for example straight.

Alternatively (not shown), the transmission module 12 comprises a gear train itself comprising the input pinion 20 and several successive gears from the input pinion 20, in particular an input gear which is meshed with the toothing of the input pinion 20 of the electric motor 11, one or more intermediate gears, and an output gear which is intended to be coupled to the mechanical actuator, in particular via the motion transformation mechanism.

The input pinion 20 is designed to be integral in rotation with the output shaft 19 of the electric motor 11 around the motor axis 15, when the motor 13 and transmission 14 housings are assembled one to the other. 'other.

Each of the gears is rotatably mounted, with respect to the transmission part 13a of the housing 13, around an axis of rotation which is oriented perpendicular to the motor axis 15, when the motor 13 and transmission 14 housings are assembled. to one another.

The gears are stepped gears. They each comprise a pinion and a toothed wheel mounted integral in rotation with the pinion, relative to the transmission case 14, around the axis of rotation of the associated gear.

The toothed wheel of the input gear is meshed with the teeth of the input pinion 20. It is for example flat, its teeth being formed as a crown on one side of the toothed wheel. The pinion of the input gear is in turn meshed with the toothing of the toothed wheel of the intermediate gear following it.

The pinion of each of the intermediate gears is meshed with the teeth of the toothed wheel of the intermediate or output gear succeeding it.

The pinion of the output gear is intended to mesh with the toothing of a toothed wheel of the mechanical actuator, in particular of the motion transformation mechanism, which is rotatably mounted with respect to the body of the brake around a axis of rotation perpendicular to the axis of rotation of the output gear, when the transmission housing 14 is attached to the brake body. The pinion of the output gear is flat, its teeth being formed in a crown on one face of the pinion.

The transmission box 14 comprises an elongated hollow body 43 extending along an extension line 44, for example rectilinear.

The extension line 44 is for example included in a plane perpendicular to the axis of the motor 15, when the motor housing 13 and the transmission housing 14 are assembled together. Alternatively (not shown), the extension line 44 is coplanar with the motor shaft 15 and partly coincides with the motor shaft 15, when the motor housing 13 and the transmission housing 14 are assembled together.

The body 43 of the transmission housing 14 comprises one or more first walls 45, 46 arranged parallel to the motor axis 15, when the motor housing 13 and the transmission housing 14 are assembled together, and delimiting a first housing 47 of complementary shape with the first end 16 of the electric motor 11 (FIG. 3).

The first wall or walls 45, 46 further comprise a first end 48, 49 and a second end 50, 51 opposite along the axis of the motor 15, when the motor housing 13 and the transmission housing 14 are assembled together.

The second end 50, 51 of the first wall(s) 45, 46 delimits an opening 52 for access to the first housing 47 via which the first end 16 of the electric motor 11 is able to be inserted into the first housing. 47 of the transmission housing 14. The opening 52 for access to the first housing 47 is centered on the motor shaft 15, when the motor housing 13 and the transmission housing 14 are assembled together.

The first housing 47 thus accommodates the electric motor 11, when the motor 13 and transmission 14 housings are assembled together. The input pinion 20 is for example also housed in the first housing 47 (Figure 3).

The notches 37, which are provided to engage with the indexing stud 36 carried by the motor housing 13, are for example formed in the second end 50, 51 of the first wall(s) 45, 46 of the body 43 of the gearbox 14.

The first wall or walls 45, 46 comprise for example an outer side wall 45 extending around an axis parallel to or coincident with the axis of the motor 15, when the motor housing 13 and the transmission housing 14 are assembled together. .

The side wall 45 also has an outer surface 451 opposite an inner surface 452 which delimits, at least in part, the first housing 47 of complementary shape with the first end 16 of the electric motor 11.

The first wall or walls 45, 46 for example further comprise an intermediate wall 46 which is arranged, inside the transmission housing 14, parallel to the motor axis 15, when the motor housing 13 and the transmission housing 14 are assembled together.

The intermediate wall 46 also has a first surface 461 and a second opposite surface 462 which delimits, with a first part of the internal surface 452 of the side wall 45, the first housing 47 of complementary shape with the first end 16 of the electric motor. 11.

The first end 49 of the intermediate wall 46 carries for example the axis of rotation 41 of the input gear 38 of the transmission module 12.

The first wall or walls 45, 46 for example also delimit a second housing 53 in which the transmission module 12 is provided at least in part, the input pinion 20 being for example housed in the first housing 47.

The second housing 53 is for example defined by a second part of the internal surface 452 of the side wall 45 and by the first surface 461 of the intermediate wall 46, the intermediate wall 46 thus separating the first housing 47 from the second housing 53.

Alternatively (not shown), in particular when the extension line 44 of the body 43 is coplanar with the motor axis 15, the second housing 53 is delimited by one or more second walls extending from the first wall or walls 45 , 46.

The body 43 of the transmission housing 14 for example also comprises a bottom wall 54 arranged perpendicular to the motor axis 15, when the motor housing 13 and the transmission housing 14 are assembled together, and closing the second housing 54, at the level of the second end 50, 51 of the first wall(s) 45, 46.

The bottom wall 52 for example comprises an opening (not shown) through which the coupling member 40c extends. The bottom wall 52 is thus intended to be located facing the brake body, when the motor 13 and transmission 14 housings are assembled together.

The transmission housing 14 is for example made by molding a plastic material, in particular by injection molding a plastic material.

The transmission case 14 is for example made from a thermoplastic material, such as polybutylene terephthalate, also called "PBT", in particular PBT GF30, that is to say PBT reinforced by 30% by weight fiberglass, or polyamide, also called "PA", in particular PA66 or PA66 GF30, that is to say PA66 reinforced with 30% by weight of glass fibers. Of course, other types of fillers can be implemented.

The motor housing 13 and the transmission housing 14 are for example assembled to one another by elastic fitting, by shrink fitting, by screwing, by welding, in particular by ultrasonic welding, by laser welding or even by gluing.

When the motor housing 13 and the transmission housing 14 are assembled to each other by elastic fitting, by shrink fitting or by screwing, they are for example, in addition, welded to each other, in particular by ultrasonic welding. This makes it possible in particular to ensure sealing between the motor housing 13, in particular the housing 233, and the transmission housing 14, in particular the first housing 47.

To assemble the transmission housing 14 to the motor housing 13, the transmission housing 14 and the motor housing 13 are for example respectively provided with a first and a second elastic interlocking member 56 which are designed to snap together elastically.

The first elastic interlocking member is for example carried by the first end 48, 49 of the first wall or walls 45, 46 of the transmission housing 14, while the second elastic interlocking member 56 is carried by the first end 24 of the side wall 23 of the motor housing 13.

The first elastic interlocking member comprises for example at least one recess hollowed out, at the level of the first end 48, 49 of the first wall or walls 45, 46, generally radially, with respect to the motor shaft 15 in a surface 452, 462 of the first wall(s) 45, 46, when the motor 13 and transmission 14 housings are assembled together.

The surface 452, 462 of the first wall(s) 45, 46 in which the recess(es) are cut is for example arranged facing the first housing 47. The surface 452, 462 then corresponds for example to the first part of the internal surface 452 of the side wall 45 and to the second surface 462 of the intermediate wall 46. Alternatively (not shown), the surface of the first wall or walls 45, 46 in which the recess or recesses are hollowed is opposite to that arranged in manhole of the first housing 47.

The first elastic interlocking member comprises for example a single recess extending circumferentially around the motor shaft 15, when the motor 13 and transmission 14 housings are assembled together. As a variant, the first elastic interlocking member comprises several recesses which are distributed circumferentially, in particular regularly, around the motor shaft 15, when the motor 13 and transmission 14 housings are assembled to one another.

The second elastic interlocking member 56 comprises for example one or more lugs which are elastically deformable and which extend, generally parallel to the motor shaft 15, from the first end 24 of the motor housing 13.

The or each of the lugs 56 also has a projection 57 extending, from the free end of the said lug 56, globally radially with respect to the motor shaft 15. The projection 57 of the or each of the lugs 56 is further designed to engage the or one of the recesses formed in the first wall(s) 45, 46 of the transmission housing 14, when the motor 13 and transmission 14 housings are assembled together .

The projection 57 of the or each of the lugs 56 is for example oriented towards the motor shaft 15, when the surface 452, 462 of the first wall or walls 45, 46 in which the recess or recesses are dug is arranged facing of the first housing 47. The lug(s) 56 are then arranged in the first housing 47 of the transmission housing 14, when the motor 13 and transmission 14 housings are assembled to one another.

The projection 57 of the or each of the lugs 56 is on the contrary oriented opposite the motor shaft 15, when the surface of the first wall or walls 45, 46 in which the recess or recesses are hollowed is opposite to that arranged opposite the first housing 47. The lug(s) 56 are then arranged outside the transmission housing 14, when the motor 13 and transmission 14 housings are assembled to one another.

During assembly of the motor 13 and transmission 14 casings, the projection 57 of the or each of the tabs 56 of the motor casing 13 comes into contact with the surface 452, 462 of the first wall or walls 45, 46 of the transmission box 14, thus pushing back the said lug(s) 56 which deform elastically in a direction opposite to the said surface 452, 462. The lug(s) 56 are then in the working position. Then, when the projection 57 of the tab or tabs 56 reaches the or one of the recesses, it engages with said recess by elastic return in the direction of said surface 452, 462, towards its rest position.

In order to facilitate the assembly of the motor housing 13 and the transmission housing 14, the projection 57 of the or each of the lugs 56 of the motor housing 13 has for example a beveled guide surface 58 which is oriented towards the first end 48, 49 of the first wall(s) 45, 46 of the transmission housing 14, when the motor 13 and transmission 14 housings are assembled together.

The first end 24 of the motor housing 13 for example also comprises an annular groove 59 hollowed out radially, with respect to the motor axis 15, in the side wall 23, in particular in the internal surface 232 of the side wall 23, and accommodating an annular seal 60. The groove 59 of the motor housing 13 is notably located, along the axis of the motor 15, between the lug(s) 56 and the indexing stud 36.

The seal 60 is designed to press against the first wall or walls 45, 46 of the transmission housing 14, in particular with the first part of the internal surface 452 of the side wall 45 and the second surface 462 of the intermediate wall 46 , in order to seal the first housing 47 of the transmission housing 14.

The seal 60 is for example made of an elastomeric material, in particular natural rubber or synthetic rubber. The seal 60 is for example made of ethylene-propylene-diene rubber monomer, also called “EPDM”.

The groove 59 of the motor housing 13 is for example made in an annular bead 61 extending radially, relative to the motor axis 15, from the side wall 23, in particular from the outer surface 231 of the side wall 23, and formed at the first end 24 of the motor housing 13.

A shoulder 62 is for example provided at the first end 48, 49 of the first wall or walls 45, 46 of the transmission housing 14, in particular in the first part of the internal surface 452 of the side wall 45 and the second surface 462 of the intermediate wall 46, to receive the bead 61.

Chamfered surfaces are for example provided correspondingly in the bead 61 and in the shoulder 62, between the groove 59 and the lug(s) 56 along the axis of the motor 15, when the motor 13 and transmission 14 housings are assembled. together.

The kit 100 also includes, for example, an elastically deformable damping member 65 which is designed to be interposed and in contact, along the axis of the motor 15, with the electric motor 11 on the one hand and the transmission box 14 on the other hand. on the other hand, when the motor 13 and transmission 14 housings are assembled together. The damper member 65 is therefore sandwiched, along the axis of the motor 15, between the electric motor 11 and the transmission housing 14.

In this way, the damper member 65 ensures the damping of the vibrations of the electric motor 11, when the motor 13 and transmission 14 housings are assembled together and the electric motor 11 is in operation, and thus prevents these vibrations from are transmitted to the transmission housing 14. The damping member 65 also makes it possible to take up play, along the axis of the motor 15, when the motor 13 and transmission 14 housings are assembled together.

For this, the damping member 65 has for example an annular shape extending around the motor axis 15, when the motor 13 and transmission 14 housings are assembled together.

The damping member 65 is for example in contact with the first end 16 of the electric motor 11, in particular with a surface 66 of the first end 16 of the electric motor 11 which is generally planar, which is arranged perpendicular to the axis of the motor 15 and in particular from which the output shaft 19 of the electric motor 11 projects. The damping member 65 notably surrounds the output shaft 19 of the electric motor 11.

The first wall or walls 45, 46 are further provided with an annular groove 67 extending around the motor shaft 15, hollowed out along the motor shaft 15 in the first end 48, 49 of the said first walls 45, 46 and designed to accommodate the damping member 65, when the motor housings 13 and transmission 14 are assembled together.

The groove 67 is for example made in a portion 68 of the first end 48, 49 of the first wall(s) 45, 46, which extends radially in the direction of the motor shaft 15, when the motor housings 13 and transmission 14 are assembled together.

The damping member 65 is for example made of an elastomeric material, in particular natural rubber or synthetic rubber.

The kit 100 for example still comprises one or more covers 69 designed to close the transmission box 14, in particular at the level of the first end 48, 49 of the first wall(s) 45, 46 of the transmission box 14.

The cover(s) 69 are for example assembled to the transmission casing 14 by welding, in particular by ultrasonic welding.

The cover(s) 69 carry, for example, the axes of rotation 41, 42 of the gear train 38, 39, 40.

The cover(s) 69 are for example made from a thermoplastic material, such as polybutylene terephthalate, also called "PBT", in particular PBT GF30, that is to say PBT reinforced by 30% by weight fiberglass, or polyamide, also called "PA", in particular PA66 or PA66 GF30, that is to say PA66 reinforced with 30% by weight of glass fibers. Of course, other types of fillers can be implemented.

Nomenclature _
100 sets
200A disc brake
200B drum brake
10 set gear motor
11 electric motor
12 transmission module
13 motor housing
14 gearbox
15 axis motor
16 first end of electric motor
17 second end of the electric motor
18 electric motor body
19 output shaft
20 gear train, input pinion
21 connecting tab(s)
22 motor housing body
23 engine housing side wall
231 outer surface of engine housing side wall
232 inner surface of engine housing side wall
233 housing
24 first end of motor housing
25 second motor housing end
26 engine housing bottom wall
28 electrical connector
29 electrical connector body
30 lead frame
31 first end portion
32 central part
33 second end portion
34 first serving
35 second serving
36 indexing pin
37 notch(s)
38 gear train, input gear
38a input gear
39 gear train, intermediate gear
39a intermediate gear pinion
39b intermediate gear cog wheel
40 gear train, epicyclic gear train
40a satellite
40b satellite carrier
40c coupling member
41, 42 axes of rotation
43 transmission case body
44 extension line
45 first wall(s), side wall
451 outer surface of transmission case side wall
452 inner surface of transmission case side wall
46 first wall(s), intermediate wall
461 transmission case intermediate wall first surface
462 second surface of transmission case intermediate wall
47 first housing
48 first end of the first wall or walls, in particular of the side wall
49 first end of the first wall or walls, in particular of the intermediate wall
50 second end of the first wall or walls, in particular of the side wall
51 second end of the first wall or walls, in particular of the intermediate wall
52 opening
53 second housing
54 transmission case bottom wall
56 second snap-fit member, lug(s)
57 protrusion
58 guiding surface
59 engine housing throat
60 gasket
61 bead
62 shoulder
65 damping device
66 area
67 transmission case groove
68 servings
69 cover(s)

Claims (17)

Kit (100) for manufacturing a motor vehicle brake (200A, 200B) gear motor assembly (10), comprising:
- an electric motor (11) extending along a motor axis (15) between a first end (16) and a second end (17),
- a transmission module (12) intended on the one hand to be coupled to a mechanical actuator carried by a body of the brake, and designed on the other hand to be coupled to the first end (16) of the electric motor (11),
the kit (100) being characterized in that it further comprises a motor housing (13) housing the second end (17) of the electric motor (11) and a transmission housing (14) on the one hand intended to be attached and fixed to the brake body and on the other hand housing the transmission module (12), the motor (13) and transmission (14) casings being furthermore designed to be assembled together by inserting, along the axis of the motor (15), the first end (16) of the electric motor (11) inside the transmission housing (14), so as to couple the electric motor (11) to the module transmission (12) and to obtain the geared motor assembly (10). A kit (100) according to claim 1, wherein the motor housing (13) and the transmission housing (14) are designed to fit together by snap fit. A kit (100) according to claim 1, wherein the motor housing (13) and the transmission housing (14) are designed to fit together by shrinking, screwing, welding, or bonding. Kit (100) according to one of Claims 1 to 3, in which the motor housing (13) comprises a hollow body (22) extending around the motor shaft (15) and housing the second end (17 ) of the electric motor (11), a first end (24) of the body (22) of the motor housing (13) following the motor axis (15) being designed to engage with the transmission housing (14), so as to assemble the motor housing (13) and the transmission housing (14) together. Kit (100) according to claim 4, in which the first end (24) of the body (22) of the motor housing (13) is designed to fit, with the first end (16) of the electric motor (11), inside the transmission housing (14). A kit (100) according to claim 4 or claim 5, wherein the motor housing (13) includes an electrical connector (28) projecting radially, relative to the motor shaft (15), from the body (22 ) of the motor housing (13). A kit (100) according to claim 6, wherein:
- the motor housing (13) carries an indexing stud (36),
- the transmission housing (14) comprises a plurality of notches (37) distributed around the motor shaft (15) and designed to selectively engage with the indexing stud (36) at the end of the assembling the motor (13) and transmission (14) housings by inserting the first end (16) of the electric motor (11) inside the transmission housing (14). Kit (100) according to one of Claims 1 to 7, in which:
- the transmission housing (14) comprises a hollow body (43) comprising one or more first walls (45, 46) arranged parallel to the motor axis (15), when the motor housing (13) and the transmission (14) are assembled together, and delimiting a first housing (47) of complementary shape with the first end (16) of the electric motor (11),
- the first wall or walls (45, 46) extend, along the motor axis (15), between a first and a second end (48, 49; 50, 51), when the motor housing (13) and the transmission housing (14) are assembled together, and
- the second end (50, 51) of the first wall or walls (45, 46) delimits an opening (52) for access to the first housing (47) via which the first end (16) of the electric motor (11) is able to be inserted into the first housing (47) of the transmission housing (14) along the axis of the motor (15). Kit (100) according to one of Claims 4 to 7 in combination with Claim 8, in which:
- the transmission housing (14) and the motor housing (13) are respectively provided with a first and a second elastic fitting member (56) which are designed to fit elastically one inside the other,
- the first elastic interlocking member comprises at least one hollow recess, at the level of the first end (48, 49) of the first wall or walls (45, 46), generally radially, with respect to the motor axis ( 15) in a surface (452, 462) of the at least one wall (45, 46), when the motor (13) and transmission (14) housings are assembled together, and
- the second elastic interlocking member (56) comprises one or more lugs which are elastically deformable and which extend, generally parallel to the motor shaft (15), from the first end (24) of the body (23) of the motor housing (13), the or each of the tabs (56) further having a projection (57) extending, from a free end of said tab (56), generally radially with respect to the motor axis ( 15) and adapted to engage the or one of the recesses formed in the first wall or walls (45, 46) of the transmission housing (14), when the motor (13) and transmission (14) housings are joined together. A kit (100) according to claim 9, wherein:
- the surface (452, 462) of the first wall or walls (45, 46) in which the recess or recesses are dug is arranged facing the first housing (47), and
- the projection (57) of the or each of the lugs (56) is oriented towards the motor axis (15). Kit (100) according to one of Claims 1 to 10, comprising an elastically deformable damping member (65), which is designed to be interposed between and in contact with, along the motor axis (15), the electric motor (11) on the one hand and the transmission housing (14) on the other hand, when the motor housings (13) and transmission (14) are assembled together. Kit (100) according to one of Claims 1 to 11, in which the motor (13) and transmission (14) casings are produced by molding a plastic material, in particular by injection molding a plastic material. Motor housing (13) for kit (100) according to one of claims 1 to 12. Transmission box (4) for kit (100) according to one of claims 1 to 12. Method of manufacturing a geared motor assembly (10) from a kit (100) according to one of Claims 1 to 12, comprising a step during which the motor (13) and transmission (14) housings are assembled to one another by inserting, along the motor axis (15), the first end (16) of the electric motor (11) inside the transmission casing (14), so as to coupling the electric motor (11) to the transmission module (12) and obtaining the geared motor assembly (10). Geared motor assembly (10) for motor vehicle brake (200A, 200B), obtained by implementing the manufacturing method according to claim 15. Motor vehicle brake (200A, 200B) comprising a brake body, friction means and a geared motor assembly (10) according to claim 16, the geared motor assembly (10) being attached to and fixed to said brake body.