FR3067427B1 - Mounting element on a drum brake plate of a driving device, preferably electrical, and a drum brake comprising at least one mounting element - Google Patents

Mounting element on a drum brake plate of a driving device, preferably electrical, and a drum brake comprising at least one mounting element Download PDF

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Publication number
FR3067427B1
FR3067427B1 FR1755240A FR1755240A FR3067427B1 FR 3067427 B1 FR3067427 B1 FR 3067427B1 FR 1755240 A FR1755240 A FR 1755240A FR 1755240 A FR1755240 A FR 1755240A FR 3067427 B1 FR3067427 B1 FR 3067427B1
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France
Prior art keywords
mounting
plate
housing
opening
actuator
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Active
Application number
FR1755240A
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French (fr)
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FR3067427A1 (en
Inventor
Gerard Luu
Christophe Dupas
Alberto MOLINARO
Cedric GUIGNON
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Foundation Brakes France SAS
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Foundation Brakes France SAS
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Priority to FR1755240A priority Critical patent/FR3067427B1/en
Priority to FR1755240 priority
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Publication of FR3067427B1 publication Critical patent/FR3067427B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/14Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/22Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • F16D51/20Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
    • F16D51/22Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots mechanically actuated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D2051/001Parts or details of drum brakes
    • F16D2051/003Brake supports

Abstract

Mounting element (16), on a drum brake plate (4), of a parking brake actuator driving device, said mounting element (16) having a body formed by an axial section of a parking brake actuator an extruded bar, said body having at least one housing for at least partly receiving the driving device, a first opening opening into said housing (18) for mounting said at least a portion of the drive device in the housing (18), the housing (18) and said first opening (20) being made by machining and a second opening made by machining, said second opening being intended to be aligned with a passage (15) in the plate (4) to connect the drive device to the parking brake actuator.

Description

MOUNTING ELEMENT ON A DRUM BRAKE PLATE OF A DRIVING DEVICE, PREFERABLY ELECTRICAL, AND A DRUM BRAKE COMPRISING AT LEAST ONE MOUNTING ELEMENT

DESCRIPTION

TECHNICAL FIELD AND STATE OF THE PRIOR ART

The present invention relates to a mounting element, on a drum brake plate, a driving device, preferably electric, a parking brake actuator, a drum brake comprising at least one such element. mounting and a manufacturing method.

In most modern cars, the service brake is provided by disc brakes and / or drum brakes.

They provide the service braking function, aiming at slowing or even stopping the motor vehicle, the parking or parking brake function intended to immobilize a vehicle at a standstill and the emergency brake function generally obtained with the system providing the parking brake.

It is common to equip the front train with disc brakes and the rear train of drum brakes. In this configuration, the parking brake function is performed by the drum brakes. The application of parking braking is in most cases obtained by pulling on a lever disposed in the passenger compartment which is connected to a mechanism located in the drum brake by means of a brake cable. The mechanism tends to move the braking segments of the drum brakes to apply against the drums.

A drum brake comprises - a plate intended to be fixed on a wheel axle, - a drum, rotatably mounted relative to a plate, which is intended to be carried by a wheel, - two braking segments of corresponding curvature to a radius of the drum, which is movably mounted on the plate between an inactive position in which they are biased towards the axis of the drum with a determined clearance relative to the drum, and an active position in which they bear radially against the drum, - a hydraulic wheel cylinder interposed between the two braking segments at one of their two ends, - a fixed point located at the other end of the braking segments. The fixed point is for example formed by an abutment plate riveted on the plate

When the service braking is activated by supplying the wheel cylinder with fluid under pressure, the braking segments deviate towards the drum by bearing on the fixed point.

When parking braking is activated, a lever disposed between the two segments near the wheel cylinder separates the two segments that bear on the fixed point.

This mode of operation is called "simplex".

There is also another mode of operation for drum brake, called "servo duo", wherein the actuator spreads an end of a first segment. It rests on the drum while its other end is floating and is supported by a floating link on the second segment by its opposite end, floating too. The other end of the second segment is the only one to bear on a thrust plate. This mode is significantly more efficient. A duo servo-type drum brake is sometimes used as a parking brake only, for example by using the inside of the central bell of a disk serving as a service brake as a drum, a combination called "Drum in hat".

It has also been proposed to provide a drum brake which would function as a service brake in simplex mode and as a parking brake in servo-duo mode, as described for example in document FR3013408. The fixed point is formed of an actuator which is activated only parking braking. The actuator can be electrically activated.

WO2012 / 101485 discloses a drum brake comprising an actuator driven by a geared motor to achieve a "duo servo" operating mode in parking braking. The actuator is mounted on one side of the drum brake plate carrying the brake shoes and the wheel cylinder used in service braking, and the geared motor is mounted on the opposite side of the plate substantially perpendicular to the actuator. . A transmission assembly transmits the gearmotor drive to the actuator.

The geared motor is secured to the plate by means of a housing.

It is generally sought to optimize the manufacture of drum brakes whose parking brake function is electrically activated.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a mounting member, on the drum brake plate, of a parking brake actuator drive device. simplified manufacturing. It is also an object of the present invention to provide a simplified manufacturing drum brake.

The above object is achieved by a mounting member of a parking brake actuator driving device on a drum brake plate at a first face, having a body from a portion of an extruded bar, said body comprising a housing for receiving at least a portion of the drive device, said housing being made by machining, tray fixing means made by machining and access to the housing to allow the mechanical connection between the drive device and the actuator, the access being made by machining.

The mass production of mounting elements can then be simplified, since it uses identical portions from an extruded bar and the machining of the different body parts can be achieved by means of a numerical control. In addition, the outer profile of the bar can directly form portions of the outer surface of the mounting member.

In a very advantageous manner, the housing of the parking brake actuator may also comprise a body derived from an extruded bar, preferably of identical shape to that used to manufacture the body of the mounting element.

Even more advantageously, the same extruded bar or different extruded bars are used to realize both the mounting member of the driving device, the actuator housing and the wheel cylinder. The use of an extruded bar also makes it possible to very easily modify the size of the mounting element, compared to a molding embodiment, and thus to be able to modify the size of the drive device.

The present invention also relates to a mounting member, on a drum brake plate, a driving device of a parking brake actuator, said mounting member comprising a body comprising an outer surface, said body being formed by an axial section of a first extruded bar, said body having at least one housing for receiving at least part of the driving device, a first opening opening into said housing for mounting said at least a portion of the device in the housing, the housing and said first opening being made by machining and a second opening made by machining, said second opening being intended to be aligned with a passage in the plate to connect the drive device to the actuator of the parking brake, the outer profile of the first extruded bar including zones directly forming parts s the outer surface of the mounting element.

The outer surface of the body advantageously comprises at least one flat face intended to bear against a second face of the plate, said flat face being formed by a portion of a flat face of the first extruded bar. The mounting member may comprise at least one platen attachment plate, said platen attachment being formed by a portion of a transverse extension of the first extruded bar.

The present invention also relates to a drum brake comprising a plate, at least one parking brake actuator mounted on a first face of the plate, said actuator comprising a housing in which is mounted a drive assembly, a device for driving of the parking brake actuator, a mounting element according to the invention, in which at least a part of the driving device is housed, at least one braking segment and a drum, the mounting element being mounted on the second face of the plate, the plate having a passage, the mounting element being mounted on the plate so that the second opening is aligned with the passage of the plate, said housing having a lateral opening giving access to the assembly of the housing being mounted on the tray so that the lateral opening of the housing is aligned with the tray passage, the drum brake also having a transmission between the driving device and the driving assembly and passing through the second opening, the tray passage and the lateral opening of the actuator housing.

For example, the casing of the actuator comprises a body comprising an outer surface, said body formed by an axial section of an extruded bar, said body comprising at least one housing intended to receive the training assembly, the opening lateral housing and the lateral opening being made by machining, the outer profile of the second extruded bar having areas directly forming portions of the outer surface of the housing.

Preferably, the housing comprises at least one flat face intended to abut against a first face of the plate, said flat face formed by a portion of a flat face of the second extruded bar.

In an exemplary embodiment, the housing may comprise at least one platen fixing plate, said fixing plate being formed by a portion of a lateral extension of the second extruded bar.

According to an additional feature, the drum brake comprises a hydraulic wheel cylinder for applying said at least one braking segment in service braking.

The wheel cylinder may comprise a body formed by an axial section of a third extruded bar, said body having at least one housing for receiving driving pistons and a side port for supplying pressurized fluid, the housing and the lateral orifice being made by machining.

For example, the mounting member and / or the actuator housing are secured to the platen by screwing, riveting, and / or welding.

Advantageously, the fasteners of the mounting element and the actuator housing are simultaneous. The mounting member may include a mounting plate, screws passing through said mounting plate and the plate and penetrating into the housing of the actuator.

The drive device advantageously comprises at least one electric motor.

The present invention also relates to a method of manufacturing a mounting element according to the invention, comprising the steps of: - cutting a first extruded bar in axial sections whose length is substantially equal to the axial length of the mounting member to be manufactured, the first extruded bar having an outer profile selected so that the outer surfaces of the first extruded bar have outer surface members of the mounting member to be manufactured, - machining the first aperture, the housing, and of the second opening.

The present invention also relates to a method of manufacturing a mounting element according to the invention, comprising the steps of: a) producing a first extruded bar whose outer profile is chosen so that the outer surfaces of the first bar extruded comprise outer surface elements of the mounting element to be manufactured, b) cutting of the first extruded bar into axial sections whose length is substantially equal to the axial length of the mounting element to be manufactured, c) machining of the first opening, the housing and the second opening.

The present invention also relates to a method of manufacturing a drum brake according to the invention, comprising the production of the mounting element according to the method according to the invention, and the steps: - fixing the element of mounting on the plate, - placing at least a part of the driving device in the mounting element, - fixing the housing on the plate, - fixing the wheel cylinder on the plate, - fitting from to least one braking segment.

The method of manufacturing a drum brake may include prior to the attachment of the actuator on the plate, the manufacture of the housing of the actuator according to the following steps: - realization of a second extruded bar whose outer profile is chosen so that the outer surfaces of the second extruded bar comprise outer surface elements of the housing to be manufactured, - cutting of the second extruded bar into axial sections whose length is substantially equal to the axial length of the housing to be manufactured, - machining the housing for receiving the drive assembly and the lateral opening, or - cutting a second extruded bar in axial sections whose length is substantially equal to the axial length of the housing to be manufactured, the second extruded bar having an outer profile so that the outer surfaces of the second extruded bar have outer surface members of the housing to be manufactured, - machining of the housing to receive the drive assembly and the lateral opening

The first extruded bar and the second extruded bar preferably have the same outer profile.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be better understood on the basis of the following description and attached drawings in which: - Figure IA is a rear perspective view of the drum brake according to the invention of a face of a plate intended to be fixed to a wheel spindle; FIG. 1B is a perspective view of the drum brake of FIG. 1A of the opposite face to that visible in FIG. 1A; FIG. 2A is a sectional view of FIG. a drum brake plate comprising a mounting element of a drive device according to the invention and a mounting bracket of an actuator according to the invention; - FIG. 2B is a sectional view of the brake plate with drum of Figure 2A according to another sectional plane. FIG. 3 is a cross-sectional view of two different extruded bars intended for the manufacture of the mounting elements of FIGS. 2A and 2B, FIG. 4 is a cross-sectional view of two identical extruded bars intended for the manufacture of the elements. 5A is a view on the side of the first opening of the mounting element according to another embodiment, - Figure 5B is a view of the element of Figure 5A looking along the arrow Fl,

FIG. 6A is a plan view of the housing of an actuator adapted to the mounting element of FIG. 5A; FIG. 6B is a view of the housing of FIG. 6A looking along the arrow F2; FIG. is a view of an example of a plate adapted for fixing the mounting element of FIG. 5A and of the casing of FIG. 6A; FIGS. 8A to 8E are representations of different stages of mounting of the element of FIG. mounting and the housing of FIGS. 5A and 6A on the plate of FIG.

DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

In FIGS. 1A and 1B, a "dual mode" drum brake 2 may be seen in an exemplary embodiment of the invention.

The drum brake 2 comprises a drum (not shown) integral in motion of the wheel (not shown), a plate 4 which is intended to be fixedly mounted on the rocket, two braking segments 6 mounted on a first face 4.1 of the plate 4 and movable relative thereto, a wheel cylinder 8 fixed on the first face 4.1 of the plate 4 between the braking segments and for applying the braking segments 6, 7 against the drum. The tray has an X axis.

The wheel cylinder is for example hydraulic type

The braking segments 6, 7 each have an arc shape whose convexity is oriented outwards and their outer surfaces intended to come into contact with the drum under the action of the braking actuator are provided with a trim G6, G7.

The drum brake also includes a parking brake actuator 10 generally intended to keep the vehicle stationary when parked. It is usually activated when the vehicle is stationary. The actuator 10 is fixed on the first face 4.1 of the plate.

In the service brake mode, the braking torque is created by energy absorption under the effect of a friction between an inner surface of said drum, and on the other hand the friction linings G6, G7 carried by the segments 6, 7.

This friction is likely to be obtained by spacing the segments outwards under the effect of the wheel cylinder 8. From the rest position or from the parking braking position, this first actuator 8 thus brings the mechanism into position service braking, and the return to the rest position is achieved for example by return springs interconnecting the two segments. In this example, the drum brake is arranged to operate in simplex mode when actuated as a service brake.

In the example shown, the wheel cylinder has two opposed pistons, which each actuate one of the segments 6, 7 by separating from each other their two opposite ends 6.1, 7.1, c '. that is to say those located on the same side of the axis of rotation X, here called "moving ends" and located at the top of Figure IB. At its opposite end 6.2, 7.2, said end stop, each segment is supported on the plate 4 by an anchoring element secured to the plate, and thus forming a stop for this segment. The anchor element at least partially transmits the braking torque between segments and plate. The anchoring element of the two segments is formed by the actuator 10. The actuator 10 extends along an axis Y1 perpendicular to the axis X of the plate and parallel to the plate. It comprises a housing 12 fixed on plate 10 on the side of the first face 4.1. The housing comprises a housing formed by through bore 13 extending along the Y axis and opening at both longitudinal ends of the housing 12. A drive assembly is housed in the bore 13. In the example shown, the housing 12 has a flat face 12.1 bearing against the first face 4.1 of the plate 4. The drive assembly is for example of the screw-nut type as that described in the application WO2015 / 101485. It comprises two support elements 13 intended to form a fixed point for the ends 6.2, 7.2 of the braking segments 6, 7 respectively in service braking, and to apply a force on the ends 6.2, 7.2 parking braking being moved out of the housing along the Yl axis.

The drum brake also comprises a drive device 14 of the actuator, fixed on the side of a second face 4.2 of the plate opposite the first face 4.1 on the side of which the actuator 10 is mounted.

The drive device 14 is preferably an electric motor which may or may not be associated with a gearbox.

A passage 15, visible in FIGS. 2A and 2B, is made through the plate 4 to allow transmission of the drive of the drive device 14 to the drive assembly of the actuator 10.

The drive device 14 is secured to the plate 4 by means of a mounting element 16 fixed on the plate 4. The mounting element 16 comprises a body in which a housing 18 is formed having a first opening 20 through which is introduced at least a portion of the drive device 14, in particular the output of the drive device for driving the drive assembly.

The housing 18 has in the example shown in the form of a cylinder of revolution axis Y2 parallel to the axis Yl. The axis of the first opening is preferably also the Y2 axis for mounting the motor parallel to the plate. As an alternative, for example, the axis of the first opening 20 could be oriented perpendicularly to the plate, the axis of the motor being perpendicular to the plate.

The drive device is fixed in the housing 18 for example by means of one or more screws and / or 1 or more rods.

In addition the body comprises a second opening 22 opening into the housing 18 and intended to open facing the passage 15 of the plate 4 when the mounting member 16 is fixed on the plate 4, the second opening 22 allowing the passage of a transmission between the drive device 14 and the drive assembly. The axis of the second opening 22 is preferably perpendicular to the axis of the first opening 20.

The flat face 12.1 of the housing has a lateral opening (not visible) opening into the bore 13 and intended to be viewed from the passage 15 of the plate and the second opening 22 of the mounting element for the passage of the transmission.

When the mounting member 16 and the actuator 10 are fixed on either side of the plate 4 and the drive device 14 is mounted in the housing, it defines a substantially sealed housing including dust and liquid.

In the example shown, the mounting element 16 has a flat outer face 16.1 intended to come into contact with the second face 4.2 of the plate and in which the second opening 22 is formed. This flat outer surface extends laterally relative to to the axis Y1 so as to include a fixing plate 23 provided with bores for the passage of fixing screws 25 to the plate 4. In the example shown and very advantageously, the screws 25 are also used for fixing the housing 12 of the actuator 10, on the plate. The free ends of the screws 25 projecting from the first face 4.1 penetrate into bores (not visible) provided in the flat face 12.1 of the body of the housing. This simultaneous fixing of the mounting member and the housing facilitates the alignment of the second opening 22, the lateral opening of the housing 12 and the passage 15. The assembly is also faster.

Conversely, it could be provided that it is the housing 12 which has a fixing plate and that the simultaneous fixing of the housing 12 and the mounting element is made by screwing on the side of the first face 4.1.

In a variant, the mounting element and / or the housing may each comprise a fixing plate and may be fixed to the plate by riveting and / or welding, by the same fixing means or by separate means.

The body of the mounting member is derived from an extruded bar, for example steel or aluminum.

In FIGS. 3 and 4, cross-sections of extruded bars 24, 26, 28 can be seen which can be used to produce the mounting element.

The body is made from an axial section of an extruded bar, this axial section is then machined for example to make the first 20 and second 22 openings and the housing 18. The extruded bar is debited in axial sections of the same length and the axial sections are machined using one or more machine tools.

The extruded bar 24 of Figure 3 is the one used to make the mounting member of Figures 2A and 2B. The outer profile of the extruded bar 24 has a flat face 24.1, a portion of which will form the flat face 16.1 of the mounting element and in which the second opening 22 will be made. It also has a concave outer surface 24.2 inside the The concave outer surface 24.2 is connected to the flat face 24.1 by a projection having a substantially rectangular section, a part of which will form the fixed plate 23.

Thus, the mass production of the mounting elements is very simplified since a part of the elements of the structure of the mounting element are made directly during the extrusion of the bar. The machining steps are reduced compared to a manufacture from bars of circular section and a saving of material is achieved.

Advantageously, the housing of the actuator is also derived from an axial section of an extruded bar, which was then machined.

In Figure 3, the bar 26 is that from which is derived the axial section used to manufacture the housing 12 of the actuator of Figures 2A and 2B. This axial section is different from that of the bar 24 for the realization of the body of the mounting element. It comprises a flat face 26.1, a portion of which will form the flat face 12.1 of the housing 12 and in which the lateral opening will be made. It also has a concave outer surface 24.2 inside which will be made a housing for the training set.

Even more advantageously, the same extruded bars are used for producing the casing of the actuator and producing the body of the mounting element. In Figure 4, we can see two identical extruded bars. Thus, the supply of extruded bars or the manufacture of extruded bars is simplified because only one reference is required. The machining steps will be at least partly different.

It can also be advantageously provided that the wheel cylinder body is derived from an axial section of an extruded bar, which is then machined. Indeed, as can be seen in Figures IA and IB, the outer shape of the wheel cylinder and the outer shape of the mounting member are close, the wheel cylinder can be made from an extruded bar .

As for the actuator, the wheel cylinder is fixed on the plate for example by screwing, riveting and / or welding.

We will describe an exemplary method of producing at least one mounting element of a drive device.

In a first step a bar is extruded. Its outer profile is chosen so that when the bar is cut into axial sections, the outer surfaces include elements of the outer surface of the mounting element requiring little or no recovery. Advantageously, it comprises at least one plane face.

In one example, it also comprises a longitudinal protrusion in extension of the flat face intended to form the fixing plates.

In a next step, the bar is fed in axial sections of the same length, the length of the axial sections is substantially the length of the mounting element along the axis Y2.

In a next step, each axial section is machined so as to produce the mounting element described above, in particular the housing 18 is machined and the first opening 20 advantageously in one pass, then the second opening 22 is machined by the flat face 16.1 so that it opens into the housing 18.

Advantageously, the same steps can be performed to make the housing 12 of the actuator 10, either from an extruded bar having the same cross section as that used to make the mounting element (Figure 4), or a cross section different (Figure 3). In general, as for the realization of the mounting elements, the outer profile of the extruded bar is chosen so that, when the bar is cut into axial sections, the outer surfaces comprise elements of the outer surface of the actuator requiring no little or no recovery. Advantageously, it comprises at least one plane face.

Advantageously also, the same steps can be performed to achieve the wheel cylinder, either from an extruded bar having the same cross section as that used to make the mounting element or that to make the actuator housing, either having a different cross section.

In a subsequent step, the mounting element is secured to the plate on the side of the second face 4.2, for example by riveting and / or welding, and the housing is secured to the plate on the side of the first face 4.1.

The wheel cylinder is also fixed on the plate on the side of the first face 4.1, for example by screwing, riveting and / or welding.

The other constituent elements of the brake are also mounted on the plate, such as the braking segments.

First, the actuator is assembled by mounting in the body of the actuator, the transmission and the two pistons. The actuator thus assembled is then fixed on the brake plate, for example by screws or rivets.

The gear motor is then attached to the brake plate. The brake assembly comprising the wheel cylinder, the trimmed segments, the automatic adjustment system, the springs ... is then mounted on the brake plate.

FIGS. 5A to 8E show a particularly advantageous example of a mounting element 116 of the drive device and of an actuator 110.

In this example, the fastening of at least the mounting element 116 on the plate 104 is performed by bayonet fixing means 138.

The bayonet fixing means 138 comprise a male part carried by the plate 104 or the mounting element 116 and a female part carried by the mounting element 116 or the plate 104 respectively. In the example shown, the male part is carried by the mounting element 116 (FIGS. 5A and 5B) and comprises at least two tabs 140 bordering the second opening 122 of the body of the mounting element 116 and extending radially towards the outside of the second opening 122. In FIG. 5A, we can see the first opening 120 and the housing 118. The female part is carried by the plate 104 at the passage 115, it comprises at least two notches 142 made in the contour of the passage 115 (Figure 7).

The notches 142 are for example diametrically opposed and the tabs 140 are also diametrically opposed. One could expect more than two ears and as many notches. In addition, another provision that the diametrically opposed arrangement of the tabs and notches can be considered.

The bayonet fixing is obtained by aligning each tab 140 with a notch 142 and axially bringing the mounting member 116 of the plate 104 side of the second side 104.2 (Figure 8A), so that the tabs 140 penetrate the notches 142. Then, when the mounting member is sufficiently pushed into the passage 115 so that the tabs 140 protrude relative to the first face 104.1 of the plate 104 (FIG. 8B), the mounting element 116 is pivoted around the the axis of the passage 115 so that the tabs are in an angular position offset from the notches 142, providing axial retention of the mounting member 116 relative to the plate 104 (Figure 8C).

Advantageously, locking means 144 of the bayonet fixing are provided to prevent the mounting element 116 from disengaging the plate 104, for example because of vibrations.

The locking means 144 comprise at least one shape on the body of the mounting element 116 cooperating with at least one shape on the actuator 110, and more particularly on the housing 112, and at least one shape in the plate 104 and ensuring a locking of the mounting element 116 on the plate 104.

In the example shown, the second opening 122 has an inner contour provided with two first recesses 146 diametrically opposed.

In addition, the inner contour of the passage 115 also comprises two diametrically opposite second recesses 148 such that the inner contour of the passageway 115 corresponds to the inner contour of the second opening 122 and such that, when the mounting element 116 is mounted against the second face 104.1 of the plate 104, each first recess 146 is aligned with a second recess 148 in the direction of the axis of the passage 115 and that the inner contour of the plate and that of the second opening forms a substantially continuous closed surface.

As can be seen in FIG. 8A, the transverse plane containing the free edge of the first recesses 146 is set back relative to the transverse plane containing the tabs 140 so that, during assembly, the tabs 140 penetrate into the notches 142 of the passage axial 115 before the free edge of the first recesses 146 bears against the second face 104.2 of the plate 104.

Furthermore, the housing 112 comprises a fixing plate 150 provided with a rim 152 projecting from the face of the fixing plate 150 (FIGS. 6A and 6B). The bore 113 in FIG. 6B can be seen and in FIGS. 8D and 8E the side opening 121 of the housing 112 can be seen

The outer cross section of the edge 152 corresponds to the inner contour of the passage 115 and the inner contour of the second opening 122 so that it fits into the passageway 115 and into the second opening 122. It has two diametrically opposite lugs 154 whose the outer dimensions correspond to the inner dimensions of the first 146 and second 148 recesses. Furthermore the size of the lugs 154 along the axis of the passage 115 is sufficient for them to penetrate the first recesses 146 of the second opening 122 of the mounting element. After fixing by the bayonet connection of the mounting element 116 in the passage 115, the housing 112 is brought closer to the plate on the side of the first face 104.1 (Figure 8D) and the edge 152 is inserted into the passage 115. The ears 154 form angular stops preventing rotation of the mounting element. The bayonet mount is locked (Figure 8E).

The locking means could comprise only a first recess 146, a second recess 148 and an ear 154 or more of two first and second recesses 146 and 148 and two ears.

Furthermore, the recesses could be replaced in whole or in part by protruding shapes in the contour of the second opening 122 and in the contour of the passage 115.

The housing 112 is for example fixed on the plate 104 for example by screwing, riveting and / or welding providing high reliability of assembly. In the case of riveting or screwing, the mounting plate 150 has orifices 156 for the passage of rivets or screws.

Alternatively, bayonet securing means could be provided to secure the actuator on the plate and also ensure a locking of the mounting member on the plate.

According to another variant, it could be provided to secure the housing 112 of the actuator on the plate by bayonet securing means and to lock these means by fixing the mounting member 116 on the plate for example by screwing, riveting and / or welding.

Advantageously, means for aligning the first recesses 146 with the second recesses 148 are provided and are particularly visible in FIGS. 8A to 8C. In the example shown, the alignment means 158 are formed by a first arcuate edge 160 extending on one side of a tab 140 and a second arcuate edge 162 extending from the other side of the tab 140. The two borders 160, 162 extend towards the first recesses 146 along the contour of the second opening 122. The plane containing the free transverse faces of the borders 160, 162 is located between that containing the tabs 140 and that containing the free transverse faces of the first recesses 146.

In addition, the bases of the second recesses 148 of the passage 115 are such that they comprise two substantially radial projections 164,166 in the contour of the passage 115. The radial projection 164 of a base of a second recess 148 delimits with a radial projection 166 from the base of the other second recess two arc portions 168, 170 on either side of a second recess 148.

The two borders 160, 162 of the contour of the second opening 122 do not have the same length of arc. The arc length of the edge 160 is equal to the arc length of the arc portion 168 and the arc length of the edge 162 is smaller than the arc length of the arc portion 170 .

Preferably, the length of the border 160 is equal to the length of the portion 168, which facilitates the introduction of the mounting element in the tray.

When axially bringing the mounting member 116 and the plate 104 together, the tabs 140 penetrate into the notches 142 until the free transverse faces of the first recesses 146 bear against the face 104.2 of the plate. The edge 160 is then in the arc portion 168 and the edge 162 is in the arc portion 170. The mounting member 116 is rotated clockwise about the axis of the passageway 115, and angular end of the edge 162 of the contour of the second opening 122 abuts against the radial projection 164 of the inner contour of the passage 115. The length of the edge 162 is chosen so that when the end of the edge 162 comes into abutting against the radial projection 164, the first recesses 146 are aligned axially with the second recesses 148 and allows mounting of the lugs 154 of the housing in the cavities 146,148.

This bayonet mounting of the mounting element has the advantage of offering a better distribution of the stresses with respect to a mounting of the mounting element and the actuator by riveting.

It could be provided to mount the wheel cylinder on the plate by bayonet means and also provide a locking rotation of these means.

The embodiment of the machining mounting element of a section of an extruded bar is particularly adapted to the embodiment of the mounting element of FIGS. 5A and 5B likewise for the housing of the actuator of FIGS. 6A and 6B. .

The embodiment of the mounting element from an axial section of an extruded bar, advantageously also the realization of an actuator housing from an axial section of an extruded bar and optionally the realization of a wheel cylinder from an axial section of an extruded bar can be applied to the realization of a drum in hat type parking brake.

REFERENCES X axis of the plate Y1 axis of the actuator Y2 axis of the mounting element 2 drum brake 4 plate 4.1 first face of the plate 4.2 second face of the plate 6.1, 6.2 ends of the brake segment 6 6, 7 braking segments 7.1, 7.2 ends of the braking segment 7 8 wheel cylinder 10 actuator 12 actuator body 13 bore 14 drive 15 passage in the tray 16 mounting member 18 housing of the mounting member 20 first opening 22 second opening 23 mounting plate 24 extruded bar 24.1 flat face of the extruded bar 24 24.2 concave outer surface of the extruded bar 24 24.3 projection of the extruded bar 24 26 extruded bar 26.1 flat face of the extruded bar 26 28 extruded bar 104 plate 104.1 first plate face 104 104.2 second face of plate 104 110 actuator 112 housing 113 bore 115 passage through plate 116 mounting element 118 cavity 120 first opening 122 second opening 121 lateral opening 138 bayonet fixing means 140 tabs 142 notches 144 locking means 146 first cavities 148 second cavities 150 mounting plate 152 edge 154 ears 156 orifices in the mounting plate 150 158 alignment means 160 first edge 162 second edge 164,166 radial projections 168,170 portions of arcs

Claims (17)

1. A mounting member (16), on a drum brake plate (4), a driving device (14) of a parking brake actuator (10), said mounting member (16) comprising a body comprising an outer surface, said body being formed by an axial section of a first extruded bar (24, 28), said body having at least one housing (18) for at least partly receiving the driving device ( 14), a first opening (20) opening into said housing (18) for mounting said at least a portion of the driver (14) in the housing (18), the housing (18) and said first opening (20). being made by machining and a second opening (22) made by machining, said second opening (22) being intended to be aligned with a passage (15) in the plate (4) to connect the drive device (14) to the parking brake actuator (10), the outer profile of the first extrudable bar e having areas directly forming parts of the outer surface of the mounting member.
2. Mounting element according to claim 1, wherein the outer surface of the body comprises at least one plane face (16.1) intended to abut against a second face (4.2) of the plate (4), said flat face (16.1). being formed by a portion of a planar face (24.1) of the first extruded bar (24).
3. Mounting element according to claim 2, comprising at least one mounting plate (23) to the plate (4), said fixing plate (23) being formed by a portion of a transverse extension (24.3) of the first bar extruded (24).
4. Drum brake comprising a plate, at least one parking brake actuator (10) mounted on a first face of the plate, said actuator (10) comprising a housing (12) in which is mounted a drive assembly, a driving device (14) of the parking brake actuator (10), a mounting element (16) according to one of claims 1 to 3, in which the drive device (14) is housed at least in part. ), at least one braking segment (6, 7) and a drum, the mounting element (16) being mounted on the second face (4.2) of the plate (4), the plate (4) having a passage (15) ), the mounting element (16) being mounted on the plate (4) so that the second opening (22) is aligned with the passage (15) of the plate (4), said housing (12) having a lateral opening giving access to the drive assembly, the housing (12) being mounted on the tray (4) so that the lateral opening of the housing (12) is igneous with the passage (15) of the plate (4), the drum brake also having a transmission between the driving device (14) and the driving assembly and passing through the second opening (22), the passage (15) ) of the plate (4) and the lateral opening of the housing (12) of the actuator (10).
The drum brake according to claim 4, wherein the housing (12) of the actuator (10) comprises a body including an outer surface, said body formed by an axial section of an extruded bar (26), 28). , said body having at least one housing (13) for receiving the drive assembly, the side opening the housing (13) and the side opening being made by machining, the outer profile of the second extruded bar having areas directly forming portions of the outer surface of the housing.
6. drum brake according to claim 5, wherein the housing comprises at least one planar face (12.1) intended to abut against a first face of the plate, said flat face formed by a portion of a flat face of the second extruded bar.
A drum brake according to claim 4, 5 or 6, wherein the housing has at least one platen mounting plate (4), said platen being formed by a portion of a lateral extension of the second extruded bar .
8. Drum brake according to one of claims 4 to 7, comprising a hydraulic wheel cylinder (8) for applying said at least one braking segment (6, 7) in service braking.
A drum brake according to claim 8, wherein the wheel cylinder (8) comprises a body formed by an axial section of a third extruded bar, said body having at least one housing for receiving driving pistons and a lateral orifice for supplying pressurized fluid, the housing and the lateral orifice being made by machining.
Drum brake according to one of Claims 4 to 9, in which the mounting element (16) and / or the housing (12) of the actuator (10) are fixed to the plate (4) by screwing. , riveting and / or welding.
A drum brake according to claim 10, wherein the fasteners of the mounting member (16) and the housing (12) of the actuator (10) are simultaneous.
A drum brake according to claim 11, wherein the mounting member (16) has a mounting plate (23), screws (25) extending through said mounting plate (23) and the plate (4) and penetrating in the housing (12) of the actuator (10).
13. Drum brake according to one of claims 4 to 12, wherein the drive device (14) comprises at least one electric motor.
14. A method of manufacturing a mounting element according to one of claims 1 to 3, comprising the steps of: a) providing a first extruded bar whose outer profile is chosen so that the outer surfaces of the first extruded bar comprise outer surface elements of the mounting element to be manufactured, b) cutting of the first extruded bar into axial sections whose length is substantially equal to the axial length of the mounting element to be manufactured, c) machining of the first opening, housing and second opening.
15. A method of manufacturing a drum brake according to one of claims 4 to 13, comprising the embodiment of the mounting element according to the method of claim 14, and the steps: - fixing the mounting element on the plate, - setting up at least a part of the driving device in the mounting element, - fixing the box on the plate, - fixing the wheel cylinder on the plate, - fitting at least a braking segment.
16. A method of manufacturing a drum brake according to claim 15, comprising prior to the attachment of the actuator on the plate, the manufacture of the housing of the actuator according to the following steps: - realization of a second extruded bar whose outer profile is chosen so that the outer surfaces of the second extruded bar comprise outer surface elements of the housing to be manufactured, - cutting of the second extruded bar in axial sections whose length is substantially equal to the axial length of the housing to manufacture, machining of the housing to receive the training assembly and the lateral opening.
The manufacturing method according to claim 16, wherein the first extruded bar and the second extruded bar have the same outer profile.
FR1755240A 2017-06-12 2017-06-12 Mounting element on a drum brake plate of a driving device, preferably electrical, and a drum brake comprising at least one mounting element Active FR3067427B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR1755240A FR3067427B1 (en) 2017-06-12 2017-06-12 Mounting element on a drum brake plate of a driving device, preferably electrical, and a drum brake comprising at least one mounting element
FR1755240 2017-06-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1755240A FR3067427B1 (en) 2017-06-12 2017-06-12 Mounting element on a drum brake plate of a driving device, preferably electrical, and a drum brake comprising at least one mounting element

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FR3067427A1 FR3067427A1 (en) 2018-12-14
FR3067427B1 true FR3067427B1 (en) 2019-08-02

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FR1755240A Active FR3067427B1 (en) 2017-06-12 2017-06-12 Mounting element on a drum brake plate of a driving device, preferably electrical, and a drum brake comprising at least one mounting element

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113073A (en) * 1977-09-23 1978-09-12 General Motors Corporation Wheel cylinder
DE19741599A1 (en) * 1997-09-20 1999-03-25 Itt Mfg Enterprises Inc Hydraulic cylinder, in particular for a drum brake
KR20130037875A (en) * 2011-10-07 2013-04-17 주식회사 만도 Electronic parking brake

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