FR2515292A1 - GRIP DISC BRAKE - Google Patents

Abstract

THIS IS A DISC BRAKE OF THE KIND IN WHICH THE DISC 11 HAS A THROAT 12 AT ITS PERIPHERY IN WHICH THE FIXED SUPPORT 13 PENETTS AND IN WHICH THE CONTROL MEANS 17 ARE AVAILABLE TO ENSURE AN AXIAL APPLICATION OF THE SKATES OF BRAKING 14A, 14B AGAINST THE SIDES 15A, 15B OF THE SAID THROAT 12. ACCORDING TO THE INVENTION, AND IN COMBINATION, THE DISC 11 IS MOBILE AXIALLY MOUNTED ON THE HUB 10 WHICH CARRIES IT, AND THE CONTROL MEANS 17 INCLUDE A CONTROL PART 18 MOBILE ASSEMBLY CIRCUMFERENTIALLY IN COOPERATION WITH CAM MEANS 19 SUITABLE TO DEVELOP AN AXIAL SPACING FORCE IN RESPONSE TO A CIRCUMFERENTIAL DISPLACEMENT OF THE SAID CONTROL PART 18. APPLICATION TO THROTTLE DISC BRAKES, ESPECIALLY FOR HEAVY DEVICES.

Description

The present invention relates generally

disc brakes.

  As is known, such a disk brake comprises, globally, a rotary hub to be braked, a braking disk, two braking pads, and control means adapted to act axially, for applying said braking pads

against said disk.

  The present invention is more particularly concerned with the case where the disk is of the groove type, or with a U-shaped section, such a disc having annularly at its periphery a radial groove, into which the fixed support radially penetrates, and in which are arranged both the braking pads

than the control means.

  The present invention generally has the

  object, which, in order to minimize the encum-

  axially of such a brake, is likely to facilitate its implementation, particularly on certain heavy machinery within

  of which the available location is reduced.

  More specifically, the subject of the present invention is a brake of the type comprising a rotatable hub to be braked, a braking disk, which is rotated on said

  hub, and which annularly has on its periphery a groove

  ge radial, a fixed support, which penetrates radially into the

  said groove, two braking pads, which are respectively arranged respectively opposite the flanks of said groove, therein, and control means, which, arranged in said

  throat, are fit to act axially, for the application of

  said brake pads against the flanks of said groove, this brake being characterized in that, in combination, the disk is mounted axially movable on the hub which carries it, and the control means comprise a control part mounted circumferentially movable in the throat of said disk, in cooperation with cam means for developing a

  axial displacement force in response to a circumferential movement

  ferential of said control room.

  With such an arrangement, the axial grip of the control means within the throat of the disc is reduced,

  the same applies to that of the fixed support, and consequently

15292

  quent, the axial size of the whole is itself

tagbly reduced.

  In practice, in the groove of the disc, the fixed support

  according to the invention on the one hand forms a flange, perpendicular

  the axis of the hub, and secondly a ring, parallel to it, and the control part, which extends parallel to said flange, is axially supported against it, optionally via a spacer,

  and is centered on said ring, possibly by

intermediate of a pad.

  In practice, also, one of the braking pads is formed by the fixed support, said fixed support carrying for this purpose a friction lining, while the other shoe

  braking system, which in the usual way is axially

  bile, is engaged on the ring of said fixed support, being wedged in rotation thereon, for example by a fluted mounting. Thus, according to the invention, the fixed support itself assumes in a simple manner a multiplicity of functions: it collects the braking torque, it provides an axial support

  to the control room, and it ensures the centering of it.

  The features and advantages of the invention

  will come out from the following description, as a

  for example, with reference to the accompanying schematic drawings in which: Figure 1 is a partial axial axial view of the brake according to the invention, along the broken line I-I of Figure 2;

  FIG. 2 is a partial view in elevation, followed by

arrow II of Figure 1;

  FIG. 3 is a partial cross-sectional view of

  versale, along the line III-III of Figure 1; FIG. 4 is a partial plan view, along arrow IV of FIG. 1, on which the various members of the brake according to the invention have been axially discarded.

each other.

  As illustrated in these figures, and in known manner

  in itself, the brake according to the invention comprises a rotatable hub

  a braking disk 11, which is locked in rotation on said hub 10, and which has, at its periphery, a radial groove 12, a fixed support 13, which penetrates radially into said groove 12 of the disk 11, two braking pads 14A, 14B, which are each respectively opposite the flanks 15A, 15B of said groove 12, therein, and control means 17, which, detailed below, are also arranged in said groove 12, and are suitable for acting axially, for application of the braking pads 14A, 148 against said flanks 15A, 15B of said

12 throat of the disc 11.

  According to the invention, and in combination, on the one hand the disk 11 is mounted axially movable on the hub 10 which carries it, and, on the other hand, as detailed below, the control means 17 comprise a part 18 mounted circumferentially in the groove 12 of said disk 11, in cooperation with cam means 19 to develop

  an axial spacing force in response to a circumferential movement

  conference of said control room 18.

  In the embodiment shown, a spline arrangement 20 is provided between the disc 11 and the hub 10, over a larger diameter span 21 thereof, and, on the opposite side to the fixed support 13, said disc 11 comprises an abutment heel 23, for bearing on a shoulder 24 of the hub

  10 formed by the corresponding transverse end slice

  said larger diameter of said scope 21, while, on the fixed support side, the disc 11 is subjected

  elastic means which axially solicit

  manence towards said shoulder 24 of the hub 10.

  In practice, in the embodiment shown, the disk 11 is in two parts suitably assembled to one another by screws 26, namely a first portion 11 A, with an L-shaped cross-section, on which are formed the grooves of the splined assembly 20, and a second portion 11 B, with a cross section, on which is formed the heel

stop 23.

  Furthermore, in the embodiment shown, the elastic means associated with the disk 11 are formed by a

  plurality of resilient tongues 28, which extend radially

  and, at one of their ends, are attached by screws 30 on the disk 11, while, at their other end, they bear on the hub 10, and more specifically, on the transverse end face. of the larger diameter reach 21 of this hub opposite to that on which

is formed the shoulder 24.

  In practice, several elastic tongues 28,

  circularly, are provided, and at each of them, there is associated a rigid plate 32 which, attached to the disc 11, for example, and as shown, by the corresponding screw 30, is adapted to counterbolt such a tab

  elastic 28 to limit the deformation.

  As a variant, the elastic tongues 28 may

  jointly with the same ring washer, and similarly, the plates 32 may belong jointly to

  the same annular holding means associated with said washer.

  Finally, in the embodiment shown, the disc 11 externally carries, for its ventilation,

fins 33.

  Outside the groove 12 of the disk 11, the fixed support 13 forms, parallel to the axis of the assembly, a flange

  , by which it is adapted to be reported on a

  conque support 36, with the aid of screws 38 passing through axial passages 39 of said flange 35, and in the form of

  illustrated embodiment, the latter is hollowed out by an exchange of

crure 40.

  In the groove 12 of the disc 11, the fixed support 13 forms, on the one hand, a flange 42, perpendicular to the axis of the hub 10, close to the side 15 of said groove 12, and

  on the other hand a ring 43, parallel to said axis.

  According to one aspect of the invention, the braking pad

  14 A is formed by the fixed support 13, the flange 42 of this

  for this purpose, facing the flank 15 A of the groove 12 of the disc 11, a friction lining 45 A, for example by gluing, while, in the usual way, the skid of

  braking 14 B is mounted axially movable.

  As a corollary, the braking pad 14 B is mounted axially movable relative to the fixed support 13, while

  being rotated on it.

  In practice in the embodiment shown, this braking pad 14 B, which in the usual way is formed of a support pad 448 and a friction pad 45 B suitably fitted thereto, by example by gluing, is engaged by said support plate 44 B,

  on the ring 43 of the fixed support 13, being wedged in rotation

on it.

  For example, and as shown, a rod assembly

  lures 47 is provided for this purpose between the support plate 44 B of the braking pad 146, on the one hand, and the end of the ring 43 of the support 13, on the outside thereof, on the other hand . In practice, both the fixed support 13 and the braking pads 14 A, 14 B are annular pieces in the form

embodiment shown.

  It is the same for the control part 18.

  This, which extends parallel to the flange 42 of

  fixed support 135, is axially in abutment against this flange 42.

  In the embodiment shown, this support is via a spacer 49, and it is fractionally circularly spaced spacer elements carried axially projecting by the fixed support 13 on its flange 42. Thus, the position of the control part 18 is axially well defined with respect to the fixed support 13, and

  therefore relative to the support 36 of the assembly.

  A washer 51, resting on a ring, for example slotted 52 engaged in an annular groove of the crown 43

  of the fixed support 13, axially counterbalances the control piece

  of 18 on the opposite side to the latter.

  According to the invention, the control part 18 is centered on the ring 43 of the fixed support 13, and in the form of

  shown, this centering is done through

mediator of a cushion 54.

  Finally, at its outer periphery, the control part 18 has a protrusion 55 projecting radially, for action, according to the arrow F in FIG. 2, from any control element, not shown, for example a jack adapted to act

  substantially tangentially to a circumference of the whole

  corn. In general, the cam means 19 associated with the control part 18 comprise at least two ramps 56, 56 ', one of which, the ramp 56, is integral with said control part 18, and is for example such that shown, formed on a boss 57 that has for this purpose axially projecting thereof, and the other, the ramp 56 ', is integral

  brake pad 14 B, and is, for example, as shown in FIG.

  tee, formed on a boss 57 'that has axially

  For this purpose, the support plate 44 B of this braking pad 14 B is attached. The bosses 57, 57 'are axially directed towards each other.

  the other, and the ramps 56, 56 'which they carry are complementary

each other.

  In practice, these ramps 56, 56 'extend transversely

  obliquely to the axis of the assembly, and a plurality of bosses 57, 57 'distributed circularly, is

  annularly provided on the control panel 18 and the

  support plate 44 B of the braking pad 14 B, in the manner

complementary dentur-s.

  By these bosses 57, 57 ', the control part 18 and the

  braking pad 14 A, 14 B are nested one inside the other.

  At rest, FIG. 1, the disk 11, by its abutment heel 23, is, under the stress of the resilient tongues 28, bearing against the transverse shoulder 24 of the hub 10, and a slight clearance extends axially between the sidewall 15 A of the groove 12 of said disc 11 and the brake pad 14 A that

forms the fixed support 13.

  Similarly, a slight clearance extends axially between the pad

  14B and the flank 15B of the groove 12 of the disc 11.

  During braking, and under the stress of the control member to which it is subjected, the control part 18

  is the object, following the arrow F of FIG. 2, of a displacement

  circumferentially, which in practice is of

moth-eaten.

  Taking support on the fixed support 13, and more precisely

  on the flange of the latter, the control panel 18 pro-

  then, by the ramps 56 of its bosses 57, a displacement

  axial direction, along the arrow F 'of Figure 1, the brake pad 14 B in the direction of the side 158 of the groove 12 of the disk 11, until application of this braking pad 14 B on this side 15 B. This movement being continued, the disc 11 is itself the object of an axial displacement along the arrow F 'of the

  Figure 1, which develops against the elastic tongues

  ticks 28, and which leads him to come to apply, by the flank

  A of its groove 12, against the braking pad 14 A that cons-

the fixed support 13.

  Because of the axial spacing due to the cam means 19 which are thus the object relative to each other the pads

  braking 14 A, 148, the disc 11 is then braked.

  When the action exerted on the control part 18 is released, it returns to its initial position, by

  example under the solicitation of recall means not re-

  presented, and, similarly, the disc 11 returns to its original position. Of course, the present invention is not limited to the embodiment described and shown, but encompasses

any variant of execution.

  In particular, it is not essential that the

  fixed port, and / or the brake pads, and / or the

  control consist of annular parts.

  Such bodies, or at least some of them, could on the contrary be formed, for example, each of two parts arranged diametrically

  opposite to each other.

  In such a case, the disk is also not neces-

  in two parts, such a two-part constitution of said disk being obviously indispensable only in the case where it must be mounted in the groove thereof.

  any annular piece in one piece.

  In addition, the spacer 49, or the spacer elements

  constituting it, is not necessarily part of

  integument of the fixed support 13; she could do as well

  integral part of the control part 18.

  As a variant, it forms a part independent of the

  fixed port 13 and the control part 18.

  In this case, it is preferably made of

  friction, to minimize friction between the piece of

  1-8 and the fixed support 13 and thus facilitate

  circumferential placements of said control part 18.

Claims (11)

  1 Brake of the kind comprising a rotatable hub (10) to be braked, a braking disc (11), which is rotatably fitted on said hub (10), and which has annularly at its periphery a radial groove (12), a support fixed (13), which penetrates radially into said groove (12), two braking pads (14 A, 14 B) which are respectively arranged opposite the flanks of said groove (12), therein, and means of control (17), which, arranged in said throat   (12) are capable of acting axially for the purpose of   said brake shoes (14 A, 14 B) against the sides of said groove (12), characterized in that, in combination, the disk (11) is axially movably mounted on the hub which carries it,   and the control means (17) comprise a piece of   Mande (18) mounted circumferentially movable in the groove (12) of said disk (11) in cooperation with cam means (19) adapted to develop an axial spacing force in response to a circumferential movement of said piece of control (18).   Brake according to Claim 1, characterized in that one (14A) of the braking pads (14A, 14B) is formed by the fixed support (13), the said fixed support (13) carrying for this purpose a friction lining (45 A), whereas, in the usual manner, the other (14 B) of the braking pads (14 A, 14 B) is axially movable.   Brake according to Claim 2, characterized in that the cam means 19 comprise at least two ramps (56, 56 '), one of which (56) is integral with the control part (18),   and the other (56 ') is secured to the brake shoe mo- bile (14 B).   Brake according to claim 3, characterized in that   said ramps (56, 56 ') are complementary and extend   tooth transversely oblique to the axis of the hub (10).   Brake according to any one of claims 1   at 4, characterized in that the control part (18) is annular. 15292   Brake according to any one of the claims   1 to 5, characterized in that, in the groove (12) of the disc (11), the fixed support (13) forms on the one hand a flange (42), perpendicular to the axis of the hub (10), and on the other hand a crown (43), parallel to it.   Brake according to claims 5, 6, catches   jointing, characterized in that the control part (18)   is centered on the ring (43) of the fixed support (13), possibly   by way of a pad (54).   Brake according to claims 2 and 6, taken in   jointing, characterized in that the flange (42) of the fixed support (13) carries the associated friction lining (45 A),   and the movable brake shoe (14 B) is engaged on its crown.   ne (43) being rotated on it, for example by a fluted mounting.   9 Brake according to claim 6, characterized in that the control part (18) extends parallel to the flange (42) of the fixed support (13) and is axially supported against it, possibly via a spacer (49).   Brake according to any one of claims 1   at 9, characterized in that, on the side opposite to the fixed support (13), the risk (11) comprises an abutment heel (23), for axial support on a shoulder (24) of the hub (10), and on the side of the fixed support (13), it is subjected to resilient means (28) which urge it axially continuously in the direction of   said shoulder (24) of the hub (10).   Brake according to any one of claims 1   10, characterized in that the control element (18) has   radially projecting a boss (55), for action of an organism   no control such as cylinder for example.