FR2796174A1 - Mounting for pedal operated hydraulic clutch and brake controls in motor vehicles - Google Patents

Abstract

The pedal mounting is in the form of a plate with hydraulic cylinders (13,14) moulded integrally with the plate, and passing through the plate. The pedal (10a,b) is mounted (9) on the side of a bracket (27) projecting from the surface of the base plate (1).

Description

<U> ASSEMBLY DEVICE FOR </ U> <U> AT LEAST ONE PEDAL CONTROL MEMBER The present invention applies to a device for mounting at least one actuatable pressurized fluid actuator by a pedal or a lever for a motor vehicle and a driver's cab, comprising a support member in the form of a plate with two faces, respectively inner and outer with respect to said cabin, plate which carries the control member and its pedal (or lever) actuating and is capable of being fixed by at least a portion of its periphery on the conjugate edge of an opening formed through a wall of said cabin.

The present invention also relates to master cylinders integrated in such a mounting device, and of course vehicles comprising such mounting devices. Pedal controllers for motor vehicles generally have, arranged from right to left, an accelerator control and a brake control actuated generally non-simultaneously (except for the special heel-to-tip control formerly used to downshift the transmission reports on competition cars) by the right foot of the driver, and finally a clutch control (except for vehicles with automatic transmission) operated by the left foot of the driver. In passenger cars, the size of the controls is mainly conditioned by the encumbrance of the pedal itself whose positioning is carefully studied, most often resulting in suspended pedals. On commercial vehicles, the pedal control units for braking and disengaging generally comprise pressurized fluid valves, generally compressed air, whose diametral size is not only important but also tends to grow during the evolution of braking and declutching techniques.

As a result of this situation, the manufacturers of industrial vehicles carry out the mounting of the control members previously fixed on a support member in the form of a two-sided plate, which facilitates the connection of the fluid inlet and outlet pipes as well as electrical and / or electronic conductors of increasing numbers and connecting sensors to signal processing circuits. In the general context of reducing the cost of mounting vehicles and reducing mounting errors, which are relatively numerous for industrial vehicles where series are reduced, the problem has arisen of a more stable and more economical operation. mounting of the control members in the driver's cab, in particular for industrial vehicles having fluid valves of large diametric dimensions. The present invention proposes to provide a device for mounting the control organs of a vehicle, actuated by a pedal or lever, which is less cumbersome, less complex and therefore more reliable, and which makes it possible to reduce the cost of installing control members in a vehicle driver's cab, particularly in an industrial vehicle cab.

For this purpose, according to the invention, there is provided a device for mounting at least one pressurized fluid control device actuated by lever or pedal, for a motor vehicle, comprising a support having two main faces, on which is arranged said fluid pressure control member so as to pass through the support of a main face to the other main face and said lever or associated pedal being arranged on the side of a first main face of the support.

According to another embodiment, at least one of the fluid confinement walls of said pressurized fluid member is integrally formed with the support. According to another embodiment, said pressurized fluid member has fluid connection connectors opening on the side of the second main face of the support.

According to another embodiment, said pressurized fluid control member is a brake control valve or a disengagement control valve.

According to another embodiment, said brake control valve is a double brake valve whose fluid connections are arranged substantially parallel to the axis of symmetry of the double brake valve.

According to another embodiment, said brake control valve is a tandem brake valve, a first body is made integral with the support and has a receiving face of a second body insert.

According to another embodiment, said pressurized fluid control member is a disengagement control member.

According to another embodiment, said pressurized fluid control member is a hydraulic fluid master cylinder of which at least a part of the body and / or the hydraulic fluid reserve container is made in one piece with the support.

According to another embodiment, said reserve container is closed by a resilient bellows connected at one end to an annular rim of the reserve container and at the other end to a pusher or movable plunger of the master cylinder through said reserve container.

According to another embodiment, the piston of the master cylinder comprises a pusher which passes through said reserve container and carries an annular lip seal which cooperates with the bore of the master cylinder body opening on the inner wall of the container of hydraulic fluid reserve, and at least one groove real imentation is provided in the wall of said bore from the outlet in said container wall and extends axially in said wall of the bore beyond the position of inactive retraction of the lip of the annular seal, so as to allow direct refilling of the bore of the master cylinder by the hydraulic fluid of the reserve container via said groove when the piston of the master cylinder is in the position of decline.

According to another embodiment, the piston of the master cylinder is constituted by a pusher which carries at one end a seal followed by a bearing surface rotulante, always engaged in the inlet of the bore, even in position of maximum recoil of said piston, and said pusher is connected to the other end pivotally to an actuating member imposing said pusher in axial displacement pivoting at a small angle during said axial displacement.

According to another embodiment, the body of the master cylinder and a portion of the reserve container are fixed on the support in the area where the remainder of the reserve container is formed, with the interposition of a seal.

According to another embodiment, the support further has at least one electrical and / or electronic control member and an associated pedal.

According to another embodiment, said electrical or electronic control member is mounted in a housing integral with the support, said housing being disposed on the side of the first main face of the support.

According to another embodiment, the housing is integral with a lateral face of the support, on the side of the first main face of the support.

According to another embodiment, the electrical and / or electronic control member controls the engine accelerator of the vehicle.

According to another embodiment, the support has, on the side of the first main face, a connection box in which electrical connections are established between at least one sensor cooperating with one of said control members and at least one connector. through the support, said connection box can be made in one piece with the support.

According to another embodiment, said connector opens on the side of the second main face of the support by a branch terminal and is able to pass through the support substantially sealingly.

According to another embodiment, said connection box is closed, on the side of the first main face of the support, by a removable cover.

According to another embodiment, the support has pass through passages allowing the passage of fluid and / or electrical connections from one main face to the other main face of the support. According to another embodiment, said lever or associated pedal is pivotally mounted on an axis carried by a one-piece bearing with the support.

According to another embodiment, said lever or associated pedal has a fork whose hook ends engage in conjugate hook openings made in a one-piece bearing with the support and is removable.

According to another embodiment, the support has, on the side of the second main face. a cavity in which is housed at least partially the pressurized fluid control member and at least one face of said cavity is provided with reinforcing ribs.

According to another embodiment, the support has at least one face capable of being arranged, contiguous with a conjugate face of the support of another mounting device.

According to another embodiment, the support has the general shape of a rectangle comprising on three of its sides a flange intended to be applied on the edge of an opening made in a wall of the vehicle, said face adapted to be arranged joined with a conjugate face constituting the fourth side of the rectangle.

According to another embodiment, the support has the general shape of a rectangle comprising on two opposite sides a flange intended to be applied on the edge of an opening made in a wall of the vehicle, the two other sides each constituting a face adapted to be disposed contiguous with a conjugate face of the support of another mounting device.

According to another embodiment, at least one face of said support has a seal capable of sealing between said support and a mounted support joined to another mounting device.

According to another embodiment, the hydraulic pressure generating master cylinder is integrated in a two-sided plate-shaped support, to constitute a mounting device according to the invention and the motor vehicle comprises such a master cylinder.

According to another embodiment of the invention, the motor vehicle comprises two mounting devices, the first having a disengagement control member and the second having a braking control valve and, where appropriate, a further engine throttle control.

According to another embodiment, the motor vehicle comprises two mounting devices which are arranged with their respective supports contiguous in an opening in the wall of the driving cab of said vehicle. Other objects, advantages and features will appear on reading the description of various embodiments of the invention, given in a non-limiting manner and with reference to the appended drawing, in which: - Figure 1 represents a top view, that is to say, in service on the side of the driver's cab, and in perspective a mounting device according to the invention, for acceleration, braking and disengagement control members of an industrial vehicle, the brake pedal being interrupted in its middle part to reveal the inside of an open electrical connection box; - the figure ? represents in a view from below, that is to say in service from the outside of the driver's cab, and in perspective, the mounting device of Figure 1; FIG. 3 represents a view from above and therefore, in use, of the interior of the driver's cab, and in perspective, half of a mounting device according to the invention, placed in a relatively high position in the the driver's cab of the vehicle, so that the foot control removable and / or reported by hooking, is in position "pedal suspended"; - Figure 4 is an exploded perspective view from below, and therefore in use from the outside of the cabin, of another embodiment of the mounting device according to the invention, with two separate plates, one of which a clutch actuation master cylinder and the other carries a double brake valve, a connection space or box and an accelerator control (separated laterally) - FIG. 5 shows, in side and perspective view, half of a mounting device according to the invention carrying a double brake valve and electrical connections; and FIG. 6 shows, in a side view similar to that of FIG. 5, a half of the mounting device carrying a tandem double body valve and electrical connections; FIG. 7 is a partially schematic fragmentary view and in FIG. section, a master cylinder integrated into a plate of a mounting device according to the invention; - Figure 8 shows, in side view and in section, another embodiment of a plate of a mounting device according to the invention incorporating an oscillating piston master cylinder.

In Figure 1, we see in perspective the mounting device according to the invention in the position where it appears, seen from the cab of the vehicle on which it is intended to be mounted. The basic element of this device is constituted by a plate-shaped support member 1 with two main faces, respectively an inner face and an outer face relative to the driver's cab. The plate 1 is here subdivided into two half-plates 1a and 1b which are intended to be fastened contiguous by an outer flange or flange 2a and 2b respectively on the conjugate edge of an opening 3 formed through the wall of the cabin driving (not shown) of the vehicle. 3, the perpendicular and substantially rectangular edges 3b of the opening 3 which cooperate with the mounting device of which only one deini-plate is shown in FIG. 3.

The two half-plates Ia and 1b which, in some versions of the invention, can be replaced by a single plate 1, are generally produced in one piece of casting. for example in die-cast aluminum alloy, and are attached substantially sealingly, via at least one continuous inter-caliper joint 4 (see FIGS. 4 to 6), for example engaged in a groove provided on a half-plate and having an outer flexible bead contacting a smooth conjugate face 5 of the other half-plate. Fixing two contiguous half-plates on the conjugate edge of the opening 3 formed through the wall of the driver's cab. is made for example by means of a ring of bolts (not shown in the figures) passing through holes 6 formed in the outer flange 2 and conjugate holes (not shown) formed on the edge of the opening 3 in the metal wall of the driver's cab.

To ensure the seal between the outer flange 2 and the edge of the opening 3 in the wall of the driver's cab, it is provided, for example interposed on the face of the flange 2 shown in Figure 1 and coming to contact with a generally flat edge of the opening 3, a flexible continuous seal 7, for example elastomer. The edges of the seal 7 which open on the face 5 of each end of the delini-plates come for example in quasi-alignment, as seen in Figure 1. The flexible seal 7 is for example housed in a peripheral groove arranged on the face of the flange 2 in contact with the edge of the opening 3, or it is glued on the face of the flange 2 to be inserted between this flange 2 and the conjugate edge of the opening 3.

In a manner known per se, the plate 1 or the half-plates 1a and 1b bear via bearings with axis 8 (only one is visible in FIG. 1 and two are visible in FIG. 3) a pedal axle 9 on which is pivotally mounted, respectively a brake pedal 10a (interrupted to reveal the inside of a connection box) and a clutch pedal 10b. Note that each of the half-plates 1a and 1b has its own pedal axis 9. In the figure. 3, it can be seen that the pedal axle 9 is replaced by the two branches of a fork whose hook ends 1a and 11b engage in the conjugate hook openings 8a, 8b of the pedal support 8 two amounts integral with the half-plate 1 a. Each of the pedals 10 is connected, as shown in FIG. 1, via a clevis 12 (see the brake clevis 12a and the clutch clevis 12b) to a respective control pusher (not shown in the figures). a pressurized fluid valve, respectively a brake control valve 13 and a clutch control valve 14.

According to one embodiment of the mounting device of the present invention, each of the control valves, respectively 13 and disengagement valves 14, is a control valve by emission of a fluid pressure and at least one of which pressurized fluid containment walls (15 for the brake control valve, see FIG. 2) and / or reserve fluid (for example reserve oil for a master cylinder 16 for servo control). disengaging (see Figure 4), is carried out in one piece with the half-plate that carries the containment walls of the reserve fluid in the case of the clutch control valve 14 with compressed air servo-assistance (wall 17) are located inside a spare housing 18 formed integrally with the plate 1b and closed by a filler cap 19.

According to another embodiment of the mounting device, the two-sided plate 1 (here the deini-plate <B>] </ B> a) comprises, came integrally foundry with the plate, a connection box 20. This housing 20 is open on the inner face to the driver's cab and inside are established, through the wall of the housing, the respective electrical and / or electronic connections - 21a between on the one hand a sensor 22a cooperating with the valve 13 for braking control, for example a displacement sensor, and on the other hand a connector 23a; - <B> 21b </ B> between firstly a sensor 22b cooperating with the clutch release valve 14, in fact here servo-clutch, for example a clutch stroke sensor 22b, and secondly a connector 23b; 21c between on the one hand a sensor (not visible in FIG. 1) of acceleration control, for example an electronic sensor of the angle of rotation of the accelerator pedal 10c, and on the other hand a connector of 23c motor. It will be noted that the pedal 10c actuates an electric and / or electronic control member 25 of the vehicle engine housed in an accelerator housing 26 situated on a lateral face 27 of the disc-plate 1a and thus housed entirely, including the I 21 c sensor, on the inside of the plate 1 a.

The electrical and / or electronic connection connectors 23a, 23b, 23c pass through the wall of the housing 20, in principle in a sealed manner, to open onto the outer face by connection terminals 24a, 24b and 24c (see FIG. 2). The inside of the housing 20, open on the inner face of the plate (or deini-plate) with two faces, is likely to be closed relative to the inside of the driver's cab, for example to protect the electrical connections and / or electronic, by a removable cover 28 (cry sees in Figure 1 a fragment of the cover 28).

According to another embodiment of the controller mounting device of the present invention, the two-sided plate 1 or at least one of the half-plates carries septum pass-through passages 29. These passages pass - Partition 29 allow easy passage and / or sealed between the outside and the cab of a pressure fluid connection and / or electrical and / or electronic. Each septum passage 29 may be closed by a plug 30 when not in use.

Each of the actuating pedals is recalled by a spring in the inactive position. FIG. 1 diagrammatically shows return springs 31a and 31b of the pedals 10a and 10b, constituted by traction springs, the return spring of the accelerator pedal 10c not being visible in the throttle body <B> 26. </ B> The control pedal of the fluid valves constituting the control members can also be returned to the inactive position by the return spring internal to this control valve and acting on the actuating pusher of the control valve. valve, as is the case in the embodiment shown in Figure 3. In the solution of Figure 3. the pedal 32 for actuating the clutch control valve is returned to the inactive position by a pusher 33 actuating the disengagement valve (the pusher 33 hidden by the pedal 32 is shown in dashed lines), itself recalled by a spring internal to the valve. It is precisely the reaction force transmitted to the pedal 32 by the pusher 33 which holds the ends 11a, 11b of the fork with two branches in contact with the conjugate hook openings 8a, 8b of the pedal support 8.

According to a variant, in the case where the actuation of the disengagement of the engine of the vehicle is performed by an automated control, it is possible to make the pedal 32 for disengaging the detachable release, this pedal 32 not being put in place by example by the driver of the vehicle, only in the case where the automated disengagement control is defective. The installation is then carried out by pressure and simple support, if necessary snapped on the pusher 33 by sliding the ends 1 <B> 1 <B> A, 1 1 b of the fork legs in the openings in hooks 8a, 8b. When actuated by the driver of the vehicle, the pedal 10a or Ob causes a movement of the actuating pusher (not shown) of the control valve 13 or 14 via the connecting yoke 12a. 12b, and the timer (not shown) actuated by this yoke is capable of respectively exciting the sensor 22a indicating the beginning of the actuation of the brakes and the sensor 22b indicating that the clutch control has performed the minimum normal stroke of walkout.

On the ii-read 4 exploded view the two separate half-plates la and lb and the accelerator control member 25 with its pedal 10c extracted from its accelerator housing 26 with its electrical connection cable and / or electronics 21c which passes a passage 34 formed in the bottom of the housing 26 to be placed inside the connection box 20. The brake control valve 13) b is constituted here by a double brake valve ( two parallel circuits operated simultaneously). The body of this double brake valve, of relatively large width. is housed in a cavity 35 of the half-plate la, formed on the outer side of this plate with ribs or profiles 36 of reinforcement and / or idissemetit. Another cavity <B> 37 </ B> is provided to receive a box of electrical connections. On the delni-plate lb shown in Figure 4, we see that the master cylinder 16 clutch release is partially housed in a recess 38 formed on the outer face of the plate 1b.

The double brake valve 13b shown in FIG. 4 has an exhaust crown 39 and fluid connection connectors 40 which open onto the outside face of the half-plate 1a and which are able to receive a fluid connection through plugging along an axis substantially parallel to the axis of symmetry of the double brake valve 13b with two parallel pressure expansion valves. FIG. 2 shows fluid connection connections of the brake valve 13, all of which open onto the outer face of the half-plate 1, and for some, 40 a, are oriented along the axis of the valve, and for others, 40b, are oriented perpendicular to the main axis of the brake valve 13.

On the outer face of the half-plate 1 shown in FIG. 5, it can be seen that the body 13a of the braking valve 13 is formed in one piece with the delni-plate and is closed by an attached base 41 which has a coupling. 42. On the delni-plate shown in FIG. 6, a tandem or series type brake valve is used, the valve body 13a of the first circuit braking valve is formed in one piece with the half-plate 1a and presents an assembly face 43 opening on the outer face of the half-plate and on which is assembled and fixed by screws an extension valve body 44 constituting the control valve of the second braking circuit, with its connection Exhaust 42 and its lateral supply and outlet connections 40b.

As can be seen in the figures, the device for mounting the pedal control members of a vehicle, generally in the form of a two-sided plate, consists of two separate delni-plates 1a, <B> 1b, </ B > having a flange or fixing flange 2a, 2b on three sides of four and may be fixed on the wall of said driver's cab, contiguously substantially sealed by their sides without fixing flange. to completely close said opening through a wall of the driver's cab. One, <B> A </ B>, half-plates carries the control valve of fceina <oc 13, while the other half-plate 1b carries the control valve clutch 14. Each half -Plaque door on its inner side, the actuator pedal 10a. l Ob its control valve with the axis of articulation 9 <B> tic </ B> this pedal disposed near a small side of the form <general rectangular half-plate.

The half-plates 1a, 1b have on their inner face a boss-like shape (see the bosses 45 and 46 in FIG. 1) presenting the actuating passage 47 (in the boss 46 of FIG. internal side of the device, for the corresponding control valve braking or disengagement. This actuating passage 47 is traversed by a valve actuating rod 48, 49 mechanically connected to the corresponding pedal 10a, 10b by the respective clevis 12a, 12b.

 As can be seen in FIG. 1, the half-plate carrying the brake valve 13 comprises a motor control 25 (accelerator) capable of pivoting with its accelerator pedal 10c about an axis substantially parallel to the 9 axis of the brake pedals and / or clutch. The motor control 25, with its pedal 10c, is mounted in a motor control box 26 integral with the side wall 27 of the half-plate 1a, which wall is formed near the long edge of the flange or fixing flange 2a. on the long side of the generally rectangular shape of the half plate 1a carrying the brake valve. The motor control unit 26 is thus located entirely on the inside face of the half plate Ia carrying the brake valve, so as to protect the electronic throttle control against all the attacks likely to be caused by the outdoor atmosphere.

The preparation of the mounting device according to the invention is carried out as described below. Each of the half plates <B> 1 </ B> a, 1 b is equipped with its respective control valve 13. 14 acting on both sides of the half-plate then perfectly accessible and available. The wall 27 is then equipped with the accelerator control 25 with its pedal 10c. Then, the corresponding pedals 10a, 10b of the control valves 13, 14 by fluid emission are put in place, by connection with their pivot axis 9 and with the valve actuation linkerinent via the clevis 12a and the rods of Actuate 48, 49, the stroke sensors or actuators being placed in position in contact or near this wheelhouse. It remains to connect the electrical and / or electronic connections 21a and 21c inside the connection box 20, the disengagement link being waiting for insertion into a detection socket of the disengagement stroke, integral with the plate <B> lb. </ B> The hydraulic fluid cilter filling of the clutch control circuit is then carried out and the two half-plates 1a and 1b, after fitting or performance test, are then ready to be stored before mounting on a vehicle, the fluid connections being closed by a plug and the electrical and / or electronic connections by a cap.

When assembling the complete half-plates 1a and 1b in a vehicle cabin, with their respective control valves 13 and 14 complete, the two half-plates are placed in position in the opening 3 formed through the wall of the cabin for driving the vehicle, starting with the plate 1 which overflows in service beyond the opening 3 by the accelerator control 25, <B> 26 </ B> and its actuating pedal 10c. The pedals 10a and lob which could protrude beyond the opening 3 formed in the wall of the vehicle cabin, are introduced first into the opening 3 and then the last plates come to be placed frontally in contact with the edge of the opening 3 by the seal 7.

When the two delni-plates 1a and 1b are in position on the wall of the cab of the vehicle, substantially sealingly joined, with the interposition of the seal 4 in contact with a conjugate face 5, the seal of 7 is in position on the edge of the opening 3 and it is possible to fix the flanges or flanges 2a, 2b of the plates by mounting for example bolts through the holes G formed in these flanges and through conjugated holes arranged in the wall of the driver's cab near the edge of the opening 3. To complete the mounting on the vehicle, on the inside of the driver's cab, it remains to connect the electrical link 21b secured to the plate la in the connection box 20 to a plug-in connection connected to the stroke sensor 22b integral with the half-plate 1b.

On the outside of the driver's cab which can be seen in Figure 2. the various fluid connections: 40a, 40b on the side of the brake valve, 40c for the compressed air supply of the valve of clutch release, 40d for disengaging hydraulic fluid supply, etc. are connected to corresponding fluid lines waiting outside the cab of the vehicle. Similarly, the external connection terminals 24a, 24b, 24c opening on the outside face are connected to son bundles waiting outside the cabin. The bulkhead passages 29 are optionally provided with a fluid or electrical circuit through, after removing their plug.

It must be understood that it is only for reasons of space and economy of realization. only one connection box 20 is provided and integrates the electrical connections of the clutch control located on the other delni-plate lb, but that each half-plate could be provided with its own connection box, in order to avoid to have to establish, in the assembly, electrical connections crossing from one half-plate to the other. Similarly, according to another embodiment, there could be an opening 3 of larger size and, where appropriate, a smaller spacing between the pedals of (kidney 10a and accelerator I Oc, so that the half-plates 1a and 1b can be mounted frontally through the opening 3 without having to first pass the pedals diagonally in the opening 3. The two half-plates 1a and 1b could also be replaced by a single plate of the already known way in the construction of industrial vehicles.

The advantage of using half-plates la and lb in place of a single large plate lies in greater ease of assembly of the control valves and also in the possibility, in case of failure of one of the control members (braking, disengagement, accelerator), to quickly change the entire mounting plate that carries the failing organ, without having to perform tortuous disassembly. The mounting plate or decni-plates according to the invention may not comprise the throttle control and may of course be arranged so as to produce suspended pedals as is partially shown in FIG. 3, according to a solution considered as the most comfortable for drivers and has the advantage of clearing the floor of the cab driving the vehicle.

FIG. 7 shows a cutaway plate, a mounting plate 1b intended in principle to be associated with a plate 1a (not shown) of braking control support and which is integrally formed with the cylinder body 50 of the master. -cylin dre 52 and the body 51 of the reserve hydraulic liquid container. The body 51 of the container is in fact made up of a plug and control portion 51a which is made in one piece, for example of resistant plastics material molded by pressure injection, and a portion 51b of capacity and decantation. The portion 51b of the container body 51 is traversed, obliquely according to Figure 7, by a pusher 53 of the piston 54 of the master cylinder. The piston 54 is, essentially, constituted by a lip seal 55 mounted in a manner retained by a central pin 56 at the end of the pusher 53. An elastic diaphragm 59, for example an elastomer, is mounted tightly and relatively tightly, respectively on a rim 58 of the container portion 51b and on a bearing surface 60 of the pusher 53. The cap portion 51a of the container is closed by a screw cap 61 carrying electrodes 62 level control hydraulic fluid in the container 51 forming reservoir, when the latter is closed.

According to a characteristic of the integrated master cylinder shown in FIG. 7, the internal bore 63 (in principle rough-cast) of the master cylinder body 50 comprises at least one axial groove 64 starting from the inlet (in principle slightly flared to facilitate the entry of the lip seal 55) of the bore 63 and extending for a sufficient length so that, in the maximum retracted position of the piston (inactive recoil position), as shown in FIG. 7, a communication is established between the inside 65 of the reserve container or tank 51 and the inside 66 of the cylindrical chamber of the master cylinder, to replenish a possible hydraulic fluid consumption of the master cylinder.

We will now explain the operation of the integrated master cylinder to its support plate, as shown in Figure 7. The support plate lb is for example fixed to the wall of a vehicle cabin, in the orientation represented by relationship to the vertical of the place. and the level 67 of the hydraulic liquid of the container 51 is established as shown by hydraulically loading the lower part of the diaphragm 59. The master cylinder body 50 is connected by its connection 68 to a hydraulic circuit to be actuated, for example a hydraulic pneumatic servo-clutch circuit with hydraulic tracking of the clutch release stroke. When actuating the pusher 53 to move it to the left of FIG. 7 (for example by means of an actuation pedal, not shown), the lip seal 55 exceeds the (where) the grooves. and the inner chamber 66 of the bore 63 is then isolated and pressurized to discharge hydraulic fluid under pressure through the connector 68. Return to the inactive recoil position as shown in Figure 7, if a consumption of low hydraulic fluid has occurred for various reasons (small leakage, wear of friction linings, transient heating of part of the hydraulic circuit, etc.), a slight depression is established at the recoil of the lip liner 55 and sucks the liquid of the container 51 through the groove or grooves 64 in the inner chamber 66 of the bore, and thence if necessary in the hydraulic circuit. It will be noted that the portion 51b of the tank body 51 has an inner settling capacity 65a, in which the abrasive and corrosive impurities (water) of the hydraulic fluid below the lower axial groove 64 can be collected and stored, such that This impurity can never be sucked by the grooves 64 and injected into the hydraulic circuit from the connection 68.

For the embodiment shown in FIG. 8 of a support plate 1b incorporating a hydraulic master cylinder, it is shown shout as seen from the side of the actuating pedal 69 mounted on an axis of rotation 70 and attached to a spring pulling 71 return inactive position of the piston 72 of the master cylinder 73. The body of the master cylinder here consists of two parts assembled. The first part of the master cylinder body is a tank body 74 of generally cylindrical shape cut at an angle and come integrally by molding, for example here cast aluminum alloy, with the rest of the plate 1b having a square 75 fixing the pedal pin 70 by means of two bearing lugs 76. The second part of the master cylinder body is a tank body-cylinder bottom assembly 77 made in one piece, for example made of resistant plastic material. by injection under pressure.

 The cylinder-tank-cylinder lond assembly 77 is fixed on the tank body 74 and the support plate <B> lb, </ B> with the interposition of an ellipsoidal seal 78, because of the sloping section of the cylindrical tank body, by conventional fastening means such as screws, bolts, rivets of which only one of the 79 axes is shown. In the embodiment shown in FIG. 8, the tank bottom 77 comprises two fittings 80 and 81 for supplying hydraulic fluid by gravity from a hydraulic fluid reservoir placed at a distance and connected to the coupling by a flexible tube. The hydraulic fluid reservoir is not shown in FIG. 8, where the connections 80 and 81 are closed each, in the delivery situation, by plugs 82.

The cylinder body 50 of the one-piece assembly 77 is similar to the cylinder body 50 shown in FIG. 7 and has, at the outlet of its bore 63 in the inner chamber 65 of the hydraulic fluid reservoir 74, 77, at least one groove 64 extending axially over a sufficient length in the bore 63 so that in the maximum retracted position of the piston 72 (inactive recoil position as shown in FIG. 8), a communication is established between the inside 65 of the reservoir of hydraulic fluid and the interior 66 of the pressure chamber of the cylinder body 50, coninie in the embodiment shown in Figure 7.

The annular lip seal 55 is mounted in an annular groove 83 which is retained by a central flange 56 in a manner similar to the embodiment shown in FIG. 7. In contrast to the embodiment shown in FIG. 7. The groove 83 which carries the seal is connected to a push rod 84, hinged at the end opposite the piston 72, to the pedal 69, by a swivel bearing surface 85 constituted here for example small pins 85a. with an outer bearing surface of generally spherical shape. The swivel bearing surface 85 remains engaged in the bore 63 of the cylinder body, even in the maximum recoil position shown in FIG. 8. In this embodiment, the axial feed grooves 64 must have an axial length. slightly greater than the width of the lip 55 of the annular sealing gasket, plus the width of the swivel bearing surface 85. The axial grooves 64, to ensure a safe imentation, extend over the length L shown in Figure 8 and which substantially corresponds to the protruding length of the cylinder body 50 towards the inside of the tank chamber 65, from the partition 86 which connects the tank bottom of the one-piece piece 77 to the tank body 50. It is thus possible to provide for this portion 86 of the body 50 projecting inwardly 65 of the reservoir and which never runs the risk of being subjected to the discharge pressure, a step sseur of material lower than for the rest of the body 50 which is subjected to the discharge pressure of the master cylinder. It will be noted that the projection of the cylinder body 50 inwards. on the length L defines a settling capacity 87, similarly and even more favorably than for the solution shown in FIG.

The push rod 84 which passes through the cylindrical body 74 said reservoir of hydraulic fluid has a groove 88 for sealing the edge of a bellows 89 whose other edge is mounted on a sleeve 90 of the upper wall 91 of the body of reservoir 74. The sleeve 90 carries a recoil abutment shoulder 92 on the push rod 84 which has a conical ramp surface 93 cooperating with an actuating tab 94 of an electrical and / or electronic contact 95 of the detector. actuenlent said master cylinder, engaged and / or snapped into a housing formed in the bracket 75 of the support plate <B> lb. </ B> The connection between the pedal 69 and the push rod 84 is performed in this embodiment, by a ball joint 96 shown schematically in Figure 8. The center 97 of the ball thus moves on a circle 98 centered on the axis 70 when the pedal 69 is actuated (when pressed on the pedal 69). During its axial movement of actuation, the push rod 84 thus swivels a few degrees of angle which is made possible by the significant clearance existing between the borehole formed through the partition 91 said tank 74 ( in fact in the sleeve 90) and the cylindrical portion 84a on the push rod 84.

The operation <B> says </ B> master cylinder 73 integrated with its actuator pedal and its mounting plate, as shown in Figure 8, is deduced in part from that which has been explained in connection with the FIG. 7. The reservoir chamber 65 connected by the coupling 80 or 81 to an external reservoir of hydraulic fluid, not shown, is completely filled with hydraulic fluid up to the bellows 89, unlike the container chamber shown in FIG. which has a fluid level 67. When an operator actuates the pedal 69 by pressing it downwards, the articulating axis 97 of the push rod 84 on the pedal moves downwards along the arc of circle 98 centered on the axis of articulation 70 of the pedal. The push rod 84 pushes the seal 55 downwards, the outer sealing lip of this insulating annular seal, after a very short stroke, the groove or grooves 64 of the inner chamber 66 of the master cylinder body 50. . The hydraulic fluid contained in the cylinder chamber 66 is then firstly discharged by the connector 68 to one or more powered devices such as a hydro-pneumatic wedge servo-clutch and secondly. pressurized by the axial force exerted on the piston 72. The few degrees of oscillation angle during the axial displacement of the push rod 84, due to the displacement of the center 97 on the circle 98, are absorbed without difficulty by the lip of the seal 50 whose attachment to the groove 83 is bent, and the radial forces caused by the reaction of the hydraulic pressure in the chamber 66 and acting on the piston 72 slightly offset from the axis of the bore 63, are absorbed by the swivel bearing lugs 85a of the swivel surface 85 on the inner wall of the bore 63. This support swiveling on the bore surface 63 lubricated causes only efforts Axial Friction very weak.

From the beginning of the axial displacement of the push rod 84, the tongue 94 passes contact with the conical ramp 93 in contact with the cylindrical surface 84a and actuates the actuating contact 95 which for example releases an actuating circuit transmission ratio switching. When the operator releases the pressure exerted on the pedal 69, the hydraulic pressure prevailing in the chamber 66 vigorously pushes up the push rod 84 and after a certain return stroke of the piston 72, the pressure in the chamber 66 decreases due to pressure losses in the discharge pipes in connection with the connection 68 of the body 50. The traction return spring 71 then takes over to recall the pedal 69 upwards and, via the ball link 96 effective in both directions, the push rod 84 and the piston 72 upwards.

In the case where a depression is established in the hydraulic pressure chamber 66 at the end of return of the piston 72 by the spring 71, this depression can be compensated for only by an inlet of the hydraulic fluid of the chamber 65 because no connection of sealing of the piston 72 does not open onto the atmosphere. As already explained for the embodiment of FIG. 7, as soon as the lip of the seal 50 projects beyond the axial grooves 64, a feed communication is provided between the hydraulic chamber 65 of the hydraulic fluid reservoir. and the cylinder chamber 66. Of course, the replenishment of the master cylinder 50 can be carried out by any known means, in place of the axial grooves 64, and in particular by a bore or transverse passage which opens on the inner wall of the cylinder. 63 and is closed by the axial displacement of the outer lip of the annular seal 55. or by the contact between a mirror-polished cylindrical plunger and the inner lip of the annular seal 55.

The embodiment of FIG. 8 makes it possible to use, for producing the integrated master cylinder, the most suitable materials, the tank seals (ellipsoidal seal 78 and bellows 89) supporting at most only one meter of column. of pressure water. The piece 77 of tank bottom and cylinder body is thus made of plastic with good mechanical strength and good coefficient of friction, while the support plate 1b is for example made of resistant, lightweight and easy to use aluminum alloy. molding, and that the push rod 84 and the pedal 69 are made of steel having a high resistance to tensile and compressive forces. It will be noted in particular that the ball joint 96 can be made with a certain latching effect. Indeed, the bearing surface or opening 96a formed in the steel punched pedal body, can be oriented in such a way that by placing the push rod with soli 84b longitudinal axis oriented substantially parallel to the long pedal arm ( 69a axis), it is possible to latch by exerting Lit] axial force limit. the ball head 84c formed on the push rod 84, in the ball socket cavity 96l. When the push rod 84 is then brought back to the position shown in FIG. 8 by pivoting the ball joint 96, the ball head 84c is then firmly snapped into the ball socket cavity 96a and an important return force of the ball order of a few daN can be exerted on the push rod 84 by pulling on the ball joint 96 exerted by the return spring 71. In the case where the connections 80 and 81 of connection to a hydraulic fluid reservoir are not used yes not planned. one could of course extend the reservoir 74 of hydraulic fluid inside 75a of the bracket 75 where appears an empty capacity available. However, the accessibility of the connection areas such as the connectors 68, 80, 81 should not be neglected during the final assembly of the support plate 1b on the wall of the cab of a vehicle.

The hydraulic pressure emitted at the cylinder body fitting 68 from a pedal control can be used for a variety of purposes in a vehicle. The actuation of a self-disengaging member has already been mentioned, but it is obvious that the hydraulic pressure could actuate a braking circuit supplied by a cryogenic hydraulic or pneumatic pressure source acting as a pilot pressure, for example for the braking circuit with anti-lock or anti-skidding, commonly referred to as "ABS braking". An advantage of the arrangement of FIG. 8 lies in the fact that if the emission capacity of the master cylinder body 50 is reduced (a few cubic centimeters), it is possible, on the other hand, to emit at high pressures, the order of a hundred bars, suitable for remote control (low loss (the relative load of the hydraulic displacement) .The hydraulic fluid reservoir is also small and the risk of air intake when the piston is important risk for remote controls that create pressure drops opposing the rapid return of hydraulic fluid) is virtually zero.

For assembly said master cylinder integrated with its pedal and its support plate, as shown in Figure 8, in locations where the outside (relative to the driver's cab) of the plate lb is almost inaccessible manually it is possible to push in the inaccessible location Lin flexible connection tube (for example a thin tube of resistant plastic material), to fix this flexible connection tube to the connection 68, to fill the reservoir 77, 74, piston 72 removed, and then engage the piston 72 in the bore 63 flared at its entrance, to replace the sleeve 90 which would then be removable and the master cylinder being filled with hydraulic fluid and connected to its flexible discharge tube , to fix the support plate lb on the rim of the passage formed in the wall of the cab of the vehicle. The body 50, 77 of the master cylinder and its flexible tube for connecting the pipe under pressure, as well as the flexible tube for connection to the coupling 80 or 81 (connected prior to the definitive placing of the support plate 1b), Thus, they can be lobed without problem in an inaccessible place where the elements which are housed there are made accessible by the withdrawal of the support plate 1b. The pedal 69 could be replaced by a plastic pedal similar to the pedal 32 and mounted like the latter by hooking on hook-shaped elements, as shown in Figure 3.

Of course, the present invention is not limited to the embodiments described and shown, but it is capable of many variants accessible to those skilled in the art, without one deviates from the spirit of the invention.

Claims (1)

<U> CLAIMS </ U> I.- Device for mounting at least one pressurized fluid control device (13, 14) operated by lever or pedal (10a, 10b, 32, 69), for a motor vehicle , comprising a generally plate-shaped holder (1) having two main locations, on which said pressurized fluid control member having at least one molded body is arranged to pass through the support plate (1), one main face to the other main face. said lever or associated pedal being mounted on the side of a first main face of the support plate, characterized in that the support plate (1, <B> 1 </ B> a, 1 b) is formed rigid and mono molding block and in that part (45, 46, 74) of said body (13a, 13b, 74) of the pressurized fluid control member (13, 14, 73) is integrally formed with the plate support <B> (1, </ b> la, 1b). 2. A mounting device according to claim 1, characterized in that at least one (15, 17, 74) of the fluid confinement walls of said fluid pressure member (13, 14, 73) is made in one piece. with the support plate (1). 3. A mounting device according to any one of claims 1 or 2, characterized in that said lever or associated pedal (10a, 10b, 10c, 69) is pivotally mounted on an axis (9, 70) carried by a bearing (8, 76) integrally formed with the support plate (1). 4. A mounting device according to any one of claims 1 to 3, characterized in that said lever or associated pedal (32) has a fork whose ends in hooks (1 1 a, <B> 11 </ B > b) engage in conjugate hook openings (8a, 8b) made in a bearing (8) integrally formed with the support plate. 5. A device for mounting control members according to claim 4, characterized cry that said lever or associated pedal (32) is easily removable. 6. A mounting device according to one of claims 1 to 5, characterized in that said fluid pressure control member is a double brake valve (13b) whose fluid connections (40) are arranged substantially parallel to the axis of symmetry of the double brake valve. 7. A mounting device according to one of claims 1 to 5, characterized in that said fluid pressure control member is a tandem brake valve whose main body (l 3a) is made integrally with the support plate and has a face (43) for receiving a second insert body (44). 8.- mounting device according to any one of claims 1 to 7. wherein, in known manner, said fluid pressure control member is a master cylinder (52) with hydraulic fluid, characterized in that at least a part of the body (50) and / or the reserve container (51, 74) of hydraulic fluid is made in one piece with the support plate (lb). 9. A mounting device according to claim 8, characterized in that said reserve container (51, 74) is closed by an elastic bellows (59, 89) connected at one end to an annular flange (58) of the container. at the other end, to a movable plunger or plunger (53, 84) of the master cylinder passing through said reserve container. 10. A mounting device according to claim 8 or 9, characterized in that the piston (54) of the master cylinder comprises a pusher (53) which passes through said reserve container (51) and carries a ring seal lip (55) which cooperates with the bore (63) of the master cylinder body (50) opening on the inner wall of the reservoir (51) of hydraulic reserve fluid, and in that at least one realignment groove ( 64) is provided in the wall of said bore from the outlet in said container wall and extends axially in said wall of the bore (63), beyond the inactive recoil position of the lip (55) of the annular seal, so as to allow direct feeding of the bore (63) of the master cylinder by the hydraulic fluid of the reserve container (51) via said groove (64) when the piston of the master cylinder is in recoil position. <B> 11 .- </ B> Mounting device according to any one of claims 8 to 10, characterized in that the piston of the master cylinder is constituted by a pusher (84) of the door at one end a gasket sealing (55) followed by a swivel bearing surface (85, 85a) always engaged in the bore inlet (63), even in the maximum recoil position of said piston (72), and in that said pusher (84) is connected. at the other end pivotally (96) to an actuator (69) imposing on said pusher in axial displacement pivoting on a small angle (arc 98) during said axial displacement. 12. A mounting device according to any one of claims 8 to 11, characterized in that the body (50) of the master cylinder and a portion (77) of the container (the reserve are fixed on the support plate ( 1b), in the zone where the remainder (74) of the reserve container is constituted, with the interposition of a seal (78) .- A mounting device according to any one of claims 1 to 12, characterized in that the support plate (1a) further has at least one electrical and / or electronic control member (25) and associated pedal (1 Oc). 14. A mounting device according to claim 13, characterized in that said electric or electronic control member is mounted in a housing (26) integral with a side face (27) of the support plate (1a), on the side of the first main face of the support plate rotated by service to the passenger compartment of the vehicle 15.- Mounting device according to any one of the claims 13 or 14, characterized in that the electrical and / or electronic control member (25) controls the accelerator of the vehicle engine. 16.- mounting device according to any one of claims 1 to 15, characterized in that the support plate (la) has, on the side of the first main face turned in service towards the passenger compartment, a connection box (20) in which are established electrical connections (21 a, 21 b, 21 c) between at least one sensor cooperating with one of said control members (13, 14, 25) and at least one connector (23a, 23b) , 23c) passing through the support plate (1). 17. A mounting device according to claim 16, characterized in that said connection box (20) is made in one piece with the support plate. 18. A mounting device according to claim 16 or 17, characterized in that said connector (23a, 23b, 23c) opens, on the side of the second main face of the support plate (1a), via a connection terminal. (24a, 24b, 24c). 19. A mounting device according to any one of claims 16 to 18, characterized in that said connector (23a, 23b, 23c) passes through the support plate (la) substantially sealed. 20. A mounting device according to any one of claims 16 to 19, characterized in that said connection box (20) is closed on the side of the first main face of the support plate (1) by a cover removable (28). 21.- mounting device according to any one of claims 1 to 20, characterized in that the support plate (1, la, <B> lb) </ B> is made of resistant plastic molded and provided with ribs or profiles (36) for strengthening and / or stiffening. 22.- Mounting device according to any one of claims 1 to 21, characterized in that the support plate (I b) has bulkhead passages (29) for the passage of fluid and / or connections links electrically from one main face to the other main face of the support plate (1b). 23.- Mounting device according to any one of claims 1 to 22, characterized Cri that the support plate <B> (l </ B> a, 1 b) has, on the side of the second main face, a cavity (35. 38) in which is at least partially housed the fluid pressure control member (13, 14, 16). 24.- Mounting device according to claim 23, characterized in that (at least one face of said cavity (35, 38) is provided with reinforcing ribs or profiles (36) and / or stiffening. `mounting according to any one of claims 1 to 24, characterized in that the support plate (la, lb) has at least one face (5) adapted to be disposed contiguous with a conjugate face (5) of the plate -support <B> (lb, </ b> la) of another mounting device 26. - Mounting device according to claim 25, characterized in that the support plate (la, lb) has the general shape a rectangle comprising on three of its sides an outer flange or a flange (2a, 2b) intended to be applied on the edge of an opening (3) made in a wall of the vehicle, said face (5) adapted to being arranged, contiguous with a conjugate face (5) constituting the fourth side of the rectangle 27.- Mounting device according to the claim 25 or 26, characterized in that the support plate (la, lb) has the general shape of a rectangle comprising on two opposite sides a flange (2a) intended to be applied on the edge of an opening (3) made in a wall of the vehicle, the two other sides each constituting a face (5) adapted to be arranged contiguous with a conjugate face (5) of the support plate (1 a. 1 h) from another mounting device. 28.- Mounting device according to any one of claims 25 to 27. characterized in that at least one face (5) of the support plate (1 a) has a seal (4) adapted to ensure sealing between said support plate (1a) and a support plate (1b) mounted, joined to another mounting device. 29.- Master cylinder generating hydraulic pressure, characterized in that it is integrated with its actuating pedal <B> (10b, 69) </ B> in a support plate (1b) in the form of a plate with two main faces, to constitute a mounting device according to any one of claims 8 to 12. 30.- Motor vehicle comprising at least one mounting device according to any one of claims 1 to 28 or a master cylinder according to the revendica 29. A motor vehicle according to claim 30, characterized in that it comprises two mounting devices, the first having a disengagement control member (14) and the second having a fluid control valve. pressure (13). 32.- A motor vehicle according to claim 31. characterized in that said second mounting device further comprises a control member (25) accelerator engine. 33.- Motor vehicle according to any one of claims 30 to 32. characterized in that two mounting devices are arranged with their respective support plates <B> (I </ B> a, I b) partially joined partial an opening (3) made in the wall of the driver's cab of said vehicle.