Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
  • B60T1/005—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles by locking of wheel or transmission rotation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
  • F16D63/006—Positive locking brakes

Definitions

• the present invention relates to a locking device for a disc brake which finds its application in particular t, although not exclusively, as a parking brake for a vehicle fitted with disc brakes, particularly helicopters.
• An object of the present invention is to provide a device ensuring positive locking of the brake disc when the vehicle with which it is associated is stationary.
• a brake locking device com ⁇ carrying a brake disc mounted to move opposite a support structure and having ver ⁇ rusting holes, wherein the locking device comprises a mobile support member mounted to slide on the
• the locking pin when the movable support member is widely separated from the brake disc, the locking pin is itself kept away from the brake disc while when the movable support member has moved closer to the brake disc. brake, the locking pin is brought into elastic abutment against the brake disc and enters a locking hole as soon as it comes opposite the ver ⁇ rusting pin so that any rotation of the disc becomes impossible even in the absence of any order.
• the locking device comprises a member for locking the movable support member in a locking position and an unlocking position.
• - Figure 2 is a view similar to that of Figure 1 of the device in a locking position but before engagement of the locking pin in a locking opening
• - Figure 3 is a view similar to that of Figure 1 of the device according to the invention in the position of total rusting
• FIG. 4 is a partially sectional view of a second embodiment of the invention in the devérroui1lage position.
• the locking device according to the invention is carried by a support structure 1 opposite which a brake disc is mounted to move.
• the support structure 1 is connected to the chassis of the vehicle and can also be used to support the usual braking device used to brake the rotation of the disc 2 when it is desired to stop the associated vehicle.
• the mobile support member 3 comprises a part of larger diameter forming a control piston 9 surrounding the mobile support member 3 and produced in one piece with it.
• the control piston 9 is mounted to slide in a sealed manner in a control chamber 10 coaxial with the control piston 9 and into which supply channels 11 for pressurized control fluid open out on either side of the piston 9.
• the tightness of the piston relative to the wall of the control chamber is provided by a seal 12.
• the seal of the control chamber is provided by an annular seal 13 carried by the support structure and cooperating with the external surface of the movable support member 3.
• the device On the side of the control chamber opposite to the brake disc, the device has a closure part 14 whose sealing relative to the support structure 1 is ensured by a seal 15 and of which the seal with respect to the mobile support member 3 is ensured by a seal 16.
• the mobile support member 3 passes through the closure part 14. Its end is extends outside the part " 14 and comprises a bore 17 used to articulate a link or a manual control lever of the locking device.
• the latter Opposite the end of the locking pin 5 facing the disc brake, the latter has locking holes 25 having a dimension sufficient to receive the corresponding end of the locking pin 5.
• the operation of the device according to the invention is as follows: when the vehicle on which the device according to the invention is mounted is traveling on the ground, the locking device is in the position illustrated by FIG. 1, that is that is to say that the mobile support member 3 is retracted either by manual action on the end of this mobile support member, or by introducing a pressure control in the control chamber on the side of the piston which is turned towards the brake disc 2.
• the movable support member 3 is held in this retracted position by the locking ball 22 cooperating with one of the V grooves 21
• the follower roller 20 is pushed back by the shoulder 18 and the position detector 19 signals that the device is unlocked.
• the locking pin 5 is pushed back by the spring 6 until it rests on the stop member 7.
• the movable support member is sufficiently set back so that in this position the locking pin 5 is itself set back relative to the brake disc 2.
• the movable support member 3 When it is desired to immobilize the parked vehicle, the movable support member 3 is maneuvered so that it comes into the position shown in FIG. 2.
• the movable member 3 is brought into this position either by acting manually by means of a connecting rod or a lever articulated in the hole 17, either by introducing a pressurized control fluid on the side of the piston 9 opposite the brake disc 2.
• the locking ball 22 In this movement, the locking ball 22 is pushed back to The locking spring 23 meets the side of the groove 21 in which it was located and enters the adjacent groove 21 to block the mobile support member 3 in the advanced position shown in FIGS. 2 and 3. If a hole Locking 25 is located at this time opposite the locking pin 5, the latter enters the locking hole and ensures positive ver ⁇ rusting of the brake disc.
• FIG. 4 illustrates another embodiment in which the control piston 9 is no longer disposed coaxially to the mobile support member 3 but is mounted in the support structure 1 parallel to the axis of the support member.
• mobile port 3 The rear end of the piston 9 is this time hingedly connected to a lever 26 which is also hingedly connected to the rear end of the mobile support member 3 and to a pivot 27 carried by the support structure 1.
• the lever includes a manual control handle 28.
• the locking pin 5 is hollow and the return spring 6 is therefore centered in blind holes in the mobile support member 3 and of the locking pin 5.
• the movable support member 3 has annular grooves in V 21 with which a locking ball 22 carried by a hollow bolt 24 cooperates. The operation of this embodiment is similar at that of the embodiment of FIGS. 1 to 3.
• the helical spring 6 can be replaced by a pressurized gas or by a buffer of elastic material in order to urge the locking pin 5 towards a support against the stop member 7.
• the circular ring 7 can equal ⁇ be replaced by another support member such as an annular rim made in one piece or attached by screwing to the end of the mobile support member 3.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Braking Arrangements (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9393695

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (1)

Citations (5)

• 1990
  • 1990-02-14 FR FR9001736A patent/FR2658254A1/fr active Granted
• 1991
  • 1991-02-15 WO PCT/FR1991/000125 patent/WO1992014635A1/fr unknown

Patent Citations (5)

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