JPS5928779B2 - Mechanically operated disc brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A disc fixed to and rotating with the member to be braked, a fixed support disposed on each side of the disc,
Two brake pieces are slidably mounted in a window formed in the fixed support, an operating lever cooperates with one of the brake pieces by a cam surface, and the lever is mounted in an articulated manner. a transfer member (t,
ra-nsfsr member), wherein said transfer member is further pivotably mounted relative to the fixed support against the action of a resilient device about an axis, hereafter known as the pivot axis. Mechanically operated brakes are already known, especially for motor vehicles.

In fact, in the case of the brake described above, this axis of rotation lies along its chord close to the periphery of the disc and at right angles to the axis of the disc.

Although this type of brake has shown and continues to perform well in certain applications, this device has a number of drawbacks.

First of all, it is essential that the traction cable connected to the operating lever for activating the brake extends in a plane approximately parallel to the plane of the disc.

The device described above is quite suitable if the brake is mounted on one of the non-steering or rear wheels of the motor vehicle.

This is because the brake is located on the front side of the wheel.

However, if the brake is attached to the steering wheel, that is, one of the front wheels of the vehicle, then taking into account the rotation of the vehicle due to the steering of the vehicle, and the resulting connection of the traction cable, the brake must be placed above the steering wheel. However, this is not considered to be an appropriate arrangement.

This is because installing the brake above the steering wheel means that the brake is not on the front side of said wheel.

In practice, it is appropriate for the brake to be present on the front side of the steering wheel.

Furthermore, since the transition member is caused to oscillate about an axis perpendicular to the axis of the disk along its chord near the periphery of the disk, the oscillation causes a sufficient amount of radial extension beyond the disk to be caused to oscillate. It becomes necessary to provide a large cavity, which limits the permissible diameter of the disk given the overall size.

Therefore, conventional brakes are not easy to manufacture, assemble, and disassemble.

Also, because of the fixed pivot for the transfer member, the transfer member may jam, or become stuck, and thus be unable to pivot about the fixed pivot.

The object of the present invention is to eliminate the above-mentioned drawbacks, and to eliminate the fixed rotational support of the transfer member, and to provide a structure in which the transfer member swings and moves around an instantaneous axis of rotation, and this axis However, the manufacture, assembly and disassembly of the brake are facilitated by the end wall of the slot of the fixed support, by the elastic device pushing the transition member, and by the fact that the transition member is pressed against the abutment. Furthermore, since there is no fixed pivot as in the prior art, there is no possibility that the transfer member will jam, that is, become stuck.

This latter effect is due to the fact that the transition member can move in all directions in a plane parallel to the end wall, and any of its possible paths of movement allow effective force transmission. do.

According to the invention, unlike the prior art, there is no fixed pivot shaft or pivot pin around which the transfer member is rotatably supported.

And instead of a fixed pivot, the disc brake according to the invention uses an elastic device (spring), which pushes towards the abutment, which is a transitional member, and the radial slots are in one plane. Since it forms one end wall, the transition member can swing in a plane parallel to the plane of the one end wall.

Note that swinging means a combination of movement and rotation.

Further, according to the present invention, when the operating lever is actuated, the cam surface of the operating lever does not slip on the brake piece.
Since it only rolls, no sliding with large friction occurs between the cam surface and the brake piece.

It is clear that sliding friction is extremely large compared to rolling friction.

Therefore, according to the present invention, the brake piece can be strongly pressed against the disk by operating the operating lever without the above-mentioned thick sliding friction.

The mechanically operable disc brake according to the invention comprises: a rotating disc fixed to the member to be braked; a fixed support; two brake pieces that are slidably supported on the window; an operating lever that cooperates with the one brake piece via a cam surface; and the operating lever is rotatably supported by a transfer member. and the transfer member is movable relative to the disc in order to transmit the braking action applied by the operating lever to the other brake piece; The transfer member is supported swingably relative to the fixed support against the action of an elastic device pushing the transfer member toward an abutting portion provided on the body, and the transfer member has an instantaneous rotation axis. , the axis of which is substantially radially extending from the axis of the disk; the receiver is received in a radial slot in the end, said radial slot forming an end wall lying on a plane, said plane being a plane of said disk; and a plane extending through the axis of the disc and extending radially through the center of the brake shoe; and radially outwardly from the one end wall. the transition member is pressed against the end wall of the slot so as to be swingable in a plane parallel to the plane of the end wall; and the abutment portion is formed by one side wall of the both side walls of the slot of the fixed support.

A traction cable connected to the operating lever extends substantially along the chord of the disc in a plane intersecting the disc, so that the lateral movement of such disc, especially when the steering wheel is braked, It is due to the characteristics of the braking device according to the invention that such a brake can be installed in the section and that it is also easily installed and that the actuation of this brake also takes place towards the top.

Furthermore, the pivoting movement of the transfer member takes place in cavities arranged laterally on each side of the disc, which advantageously does not limit the diameter of the disc in any way.

However, the device further includes a U-shaped stirrup in which the transition member engages the disc and the brake shoe in a generally radial direction.
In particular, the shape of p) has the advantage that the preferred embodiment can be easily adopted.

BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the invention will become further apparent from the description given below by way of example with reference to the accompanying schematic drawings.

In these accompanying drawings the same type of brake as mentioned in the preamble above will be recognized.

As shown in the figure, this type of brake is of a ventilated type, and includes a disc 10 on which the brake is applied, and a ledge 17 (Fig. 2) in which the disc 10 is received in a substantially radial direction. and a U-shaped fixing support 11 with which it is adapted to be fixed.

On both sides of the disc 10, the support 11 has windows 12A.

12B, and brake pieces 13A and 13B which are to be pressed against the disc 10 are accommodated in the window.

According to the embodiment shown in FIGS. 1 to 3, the brake pieces 13A and 13B each have a vane-shaped spring 14A,
14B is associated, pushing the brake shoe radially through the window 12A of the corresponding fixed support.

12B against the outer edges 15A, 15B, which are closest to the periphery of the disk 10 and thus closest to the curved area of the U-shaped support 11.

These springs 14A, 14B are fixed support windows 12A.

12B, and the inner edge on which the spring is supported is the outer edge 15A.

It is parallel to 15B and is farthest from the periphery of the disk 10.

The brake according to the invention further includes a transition member 18,
In the illustrated example, the member 18 is connected to the disc 10 by a radial slot 19 at the radially outer end of the support 11 facing the periphery of the disc 10.
3B is a U-shaped stirrup received generally radially.

The slot 19 forms an end wall 22' lying in one plane, which plane extends through the plane of the disc 1,0 and the axis of the disc and which extends through the axis of the disc 1,0. and a plane extending radially through the center.

Of the both side walls 20 and 20' of this slot 19, the side wall 20
serves as a support abutment portion, and a groove 22 extends parallel to this portion.

The support abutment or one side wall 20 and the groove 22 extend parallel to the axis of the disk.

The transfer member 1 corresponds to this support contact portion and this miso.
8 is provided with a support surface 23 and a projecting bead 24 whose shape matches the shape of the groove 22.

On the opposite side of the support abutment 20 the fixed support 11 laterally carries two projecting pins 25A, 25B, which fix an elastic device that presses the transfer member 18 against the support abutment 20. act.

In the embodiment shown in FIGS. 1-3, these elastic devices are constituted by suitably shaped round wire springs 26.

This spring has a pin 2 of the fixed support 11 in its central part.
Two torsion elements 27 that fit into 5A and 25B, respectively.
A, 27B, the elements are joined at one end thereof by a common portion 28 and at the other end:
It extends transverse arms 29A, 29B which are supported on either side of said central portion against beads 30 of the transfer member 18 carried as projections on the transfer member parallel to said beads 24. has been done.

A transfer member 18 and a stud 32 are supported on one side of the disk 10.

This stud acts as an articulation shaft for an operating lever 33, which is held by an annular clip 34 that engages with the stud 32 and rests directly on the brake shoe 13A by means of a rounded cam surface 35. .

On the other side of the disc, the transition member 18 carries an abutment extending approximately perpendicular to the disc.

In the illustrated example, this abutment has the structure of a screw 36 that is screwed into a screw hole 37 of the transfer member 18 in cooperation with a locking nut 38 .

The inner end of the screw has a rounded surface 39;
It contacts the brake piece 13B.

As shown schematically in dash-dotted lines in FIG.
is supported, for example, against a fixed element 43 fixed to the fixed support 11.

When cable 40 is pulled in the direction of arrow 45 in FIG. 3, operating lever 33 pivots about stud 32.

In the first stage (FIG. 4), the operating lever 33 has its cam surface 3
5 while contacting the brake piece 13A, and pressing the brake piece to bring it into contact with the disc 10.

In cooperation with this, a corresponding force is applied to the transfer member 18 and the screw 3.
6 to the brake piece 13B, which also comes into contact with the disc 10.

Therefore, during this first stage, the brake pieces 13A, 1
The amount of movement of the brake piece from the beginning of contact between 3B and the disc 10 until the end of contact between the brake piece and the disc is:
It may be larger or smaller depending on the degree of wear on the friction lining of the brake piece.

Then, in the second stage (FIG. 5), when the cable 40 is continued to be pulled, the operating lever 33
While in contact with the brake piece 13A, it rolls without slipping, presses the brake piece strongly against the disc 10, and transmits the corresponding force to the brake piece 13B by the transfer member 18 and the screw 36 as before, Therefore, the brake piece 13B is
They are also strongly pressed against the disk 10 one after another.

The disc 10 is then gripped and thus braked and, if so desired, finally brought to a stop.

As soon as the action on cable 40 is released, disc 10 is also released.

While the second stage of the operation is in progress, in which the operating lever 33 rolls without sliding relative to the brake piece 13A, the transfer member 1 is moved by the traction action applied to the operating lever.
8 is an instantaneous rotation axis parallel to the rotation axis of the operating lever 33;
That is, it is forced to rotate around an instantaneous axis of rotation that is approximately diametrical to the disk 10.

Therefore, during this phase, the operating lever rolls but does not slip under the load, which would impair its efficiency.

The oscillation of the transfer member 18 takes place against the action of a spring 26, which, after the effect on the cable 40 has ceased, causes the transfer member 18 to move against the abutment provided on the fixed support 11. 20 and return it to the initial supporting position.

For various stages of operation, an operating lever 33 and a transfer member 1 are provided.
The initial and intermediate positions of 8 are shown in dashed lines in FIGS. 4 and 5, and the final position is shown in solid lines.

As can be seen, the grooves 22 of the fixed support 11 and the beads 24 of the transfer member 18 cooperate to move the transfer member 18 into the disc 1.
0, and the action of these devices is based on the fixed support 11 and the transfer member 1.
8 can be reversed, and the bead 24 can also be replaced with any other protrusion, and the groove 22 can also be replaced with any other housing that supplements such a protrusion. It should be obvious.

The ends of the transverse arms 29A, 29B of the spring 26, together with the projecting bead 30 of the transfer element 18, constitute a device which also securely holds this transfer element along the same radial direction relative to the disk 10.

As also seen, the rounded end 39 of the screw 36
allows the transfer member 18 to be easily rotated, and by turning this screw, the position of the transfer member can be initially set.

It will also be appreciated that during said rotation, the transfer member 18 does not impinge on the void area around the periphery of the disk 10.

Although the structure of the reference example shown in FIGS. 6, 7, and 8 is not an embodiment of the present invention, the transition member in this reference example is connected to two U-shaped stirrups i a', i a". Each stirrup is divided into a disc 10 and a brake piece 13A.
, 13B, the receptacles are inserted in the radial direction and extend parallel to each other.

The stirrups 18', 18'' are pivotally connected at each of their ends to a common cross member 50, which carries a screw 36 adapted to be pressed against the brake piece 13B.

At each other end of the stirrup 18', 18'' (7), each stirrup carries a pivot for an operating lever 33', 33'', these two levers 33', 33'' both , cam surface 3
5′.

35'' and is in contact with the brake piece 13A.

A traction cable 40 is connected to the operating lever 33' and is surrounded by a sheath 41, the corresponding end 42 of which is supported against the other operating lever 33'.

The spring 52 is installed between the stirrups 1B', 18",
The recovery spring 53 is provided between the operating levers 33' and 33''.

Spring 52 is stronger than recovery spring 53 and provides the operation described below.

The stirrups 18 ′, 18 ″ are covered with elastic retaining vanes 54 , which extend in the plane of the disc 10 and whose ends are attached to the fixed support 11 . .

When the cable 40 is pulled, the recovery spring 53
Since they are weaker, the operating levers 33' and 33'' swing towards each other and both stirrups swing.

The operating lever 33" rotates clockwise, and the operating lever 33"
3' rotates counterclockwise, and due to such rotation, the cam surfaces on the operating levers 33', 33' come into contact with the brake pieces adjacent thereto.

Initially, those cam surfaces 35', 35'' in contact with the brake tabs 13A merely slide.

The cam surface then rolls on the brake frame, but without slipping, actuating the stirrups 1B', 1B'', which then also approach against the action of the spring 52.

Since the cam surface simply rolls on the brake frame,
Each stirrup pivots about a pivot point with a cross member 50.

When the action on the cable 40 ceases, the springs 52, 53 return the stirrups 18', 1B" and the operating levers 33, 33", respectively, to their initial positions.

Therefore, although this device has the advantage of allowing the reaction of the sheath to participate in the clamping action of the brake, it does not achieve the same effect as the present invention.

In the preamble, spring 14A is used so that brake pieces 13A, 13B are held along corresponding diameters of the discs.

14B, the spring is held by the edges 15A of the fixed support windows 12A, 12B of the fixed support 11.

In contact with 15B.

According to an alternative form of the embodiment shown in FIG. 9, the brake lug, only one 13A visible in this figure, is provided with a transverse tongue, for example formed on sheet metal, carrying its friction lining. Contains.

In cooperation with this, a slot 61 is bored laterally in the window 12A of this brake piece 13A, and the slot is received with a play between the tongue piece 60 of the brake piece. is preferred.

As is readily apparent, the rotation support 1 is rotated by the action of the spring 14A.
The support of the brake lug 13A against the brake lug 13A is carried out not at all by applying it against the edge 15A of the window 12A of this brake lug, but by resting the tongue 60 against the corresponding edge of the slot 61.

A similar arrangement may be employed for brake shoe 13B, if desired.

In all cases, the traction cable 40 extends in an approximately chordal direction with respect to the disc 10, i.e. approximately parallel to the chord of this disc, so that it is possible to apply the brake according to the invention to the lateral areas of such discs. It will be recognized that it can be easily installed.

The brake is shown installed on the top of the disk for convenience of illustration only.

In Figures 10 to 17 the same type of brake as described above will be recognized.

This brake includes a vented disc 110 and a fixed U-shaped support 111 received on both sides of the disc 110 and in the radial direction.

A slot 112 (FIG. 11) is bored in the fixed support 111 at the same level as the edge of the disk 110, the bottom of which is formed in part by each wing of this fixed support. and constitutes a support shoulder 113 (Figs. 11 and 12).

One of the end walls of the slot 112, i.e. one of the edges of this slot 112 extending perpendicular to the plane of the disk 110, forms a side surface 114 (FIG. 1L13) approximately perpendicular to the support shoulder 113. .

Another end wall of the slot 112 forms a slope 115 (FIG. 12) that is inclined relative to the support shoulder 113.

From this support shoulder 113 of the slot 112 towards the corresponding free edge, a slope 115 approaches the radius iR of the disk 110, which radial surface extends the central area of the support shoulder perpendicularly to said support shoulder. pass.

On both sides of the disk 110, on the fixed support 111, there are two windows 1
16A (Fig. 12) and 116B (Fig. 13) are provided, and brake pieces 117A (Fig. 12) and 117 are provided, respectively.
It serves as a window for B (Fig. 13).

These brake pieces each have a corresponding window 116A.
, 116B, each having a lateral leg 118 that engages within a lateral slot 119 (FIGS. 12-13), and each having a spring 120.
A, 12QB (Fig. 12.13), which springs push the brake shoes radially around the periphery of the disk 110, so that their lateral legs 118 reach the slots closest to said periphery. 119.

The brake piece 117A is thus maintained radially and circumferentially in both directions of rotation of the disc 110 by the windows 116A, 116B and their slots 118.

117B can also move within these windows perpendicular to the plane of disk 110.

The brake further includes a transition member 121.

In the illustrated example, this transition member is a U-shaped stirrup received approximately radially on both sides of the disc and the rotating support, for example manufactured by molding or stamping. Forms a single solid piece.

The inner surface of the stirrup 121, which extends towards the edge of the disc 110, forms a shoulder 122, which layer 122 extends approximately perpendicular to the plane of the disc 110 and passes through the central area of the stirrup. It also extends perpendicularly to the radial plane of the disc and is arranged on the fixed support 111 so as to cooperate with a support shoulder 113 .

One of the longitudinal edges of this stirrup, namely the disc 110
One of the edges approximately perpendicular to the plane of includes a beveled surface 123 facing shoulder 122, which surface, similar to the dovetail assembly, has beveled surface 115 (FIG. 12) provided on fixed support 111. ).

For this purpose, these surfaces 115, 113 complement each other.

That is, they each have the same slope relative to the support shoulder 113 of the fixed support 111 and the shoulder 122 of the stirrup 121.

On the other longitudinal edge, the stirrup 121 also has a slope 12
I have 4.

The slopes 123, 124 of the stirrup 121 taper away from the axis of the disk 110 and are fitted with elastic devices, which in the example shown are connected to the fixed support 111. Studs 127 carried perpendicularly to the disc 110 and on both sides of this disc as projections on top
Two screw springs 12 that fit into A and 127B respectively
6A, 126B, the springs being retained on the stand by annular clips or other resilient washers 128A, 128B.

The springs 126A and 126B are connected to the arm 129A, respectively.
, 129B, the ends of the arms are bent at right angles to the rear, and 130A, 13 are bored into the fixed support 111.
Engage within 0B.

The spring further includes a slope 1 of the transition member or stirrup 121.
24 and supported by the second arm 131A.

131B included.

Due to this inclined surface, the elastic force E (FIG. 12) applied to the stirrup 121 by the torsion springs 126A and 126B is
1 and thus press this transfer member against said shoulder with its own shoulder 122, and a force E1 perpendicular to said shoulder 113 of the fixed support 111 and thus itself replenishing said slope. Fixed support 111 by slope 123 of
The slope 115 has a component force E2 that presses the transfer member 121.

The springs 126A, 126B thus serve both to maintain the transfer member in the radial direction of the disk and in cooperation with the associated fixed support to maintain this transfer member in the tangential direction perpendicular to said direction. To constitute an elasticity maintaining device that is reliably and economically performed by itself.

On one side of the brake piece 117A, the transition member or stirrup 121 has a pivoting edge 133 (FIG. 14) that extends approximately perpendicular to the stirrup shoulder 122.

The stirrup 121 also has a slot 134 extending approximately perpendicular to this pivot edge 133 in its central area.

In FIGS. 14.15, the pivoting edge 133 is formed integrally with the transfer member or stirrup 121 that carries it, and is formed in one piece with the stirrup during molding.

Also, in the illustrated example, the bottom 135 of the slot 134 is
A belt-like plane parallel to the plane of the disk 110 is formed.

An end 136 of an operating lever 137 is received in the slot 134 of the transfer member 121 and extends substantially perpendicular to the plane of the disk 110.

The end 136 of the operating lever 137 has a strip-shaped plane 1 which is supposed to abut and cooperate with the bottom 135 of the slot 134.
Contains 38.

The other end 139 of the operating lever 137 is to be coupled to an optional traction cable (not shown) and, in the illustrated form, takes the form of a hook for that purpose.

The operating lever 137 has an edge 1 provided on the transfer member 121.
A pivoting groove 140 is provided which is intended to cooperate with the pivoting motion of 33.

In the illustrated example, this pivot groove 140 is formed on an axle 141 fixed perpendicularly to the operating lever 137 and is, for example, force-fitted into an opening 142 in the operating lever as shown. .

The operating lever is therefore rotatably mounted within the slot of the transfer member.

This device is particularly, but not only, suitable when the transfer element is of solid unitary construction, and it advantageously allows the associated actuating lever to be mounted particularly economically. It will be done.

As in the previous case, the operating lever 137 has a cam surface 143, which causes the brake shoe 117A to have a 5. It's on.

Associated with the operating lever 137 is a resilient application device for ensuring that the pivot groove 140 remains in contact with the pivot edge 133.

In the example shown, these elastic application devices include a torsion spring 145, one arm 146 of which is bent at right angles at its end and engaged in a hole 147 of the operating lever 137, while the other arm 148 bends its end back at right angles and for this purpose uses a transition member or stirrup 1
It is adapted to be supported against the bottom of a shoulder 149 formed in 21.

The pivoting edge can have a different hardness than the transition member or machining of the pivoting edge can be convenient.

As will be appreciated, the elastic application device described above further constitutes an elastic recovery device in itself, but the rotation device
The actuating lever 137 is pushed towards the rest position, in which the strip-shaped plane 138 is pressed against the strip-shaped plane formed by the bottom 135 of the slot 134 of the stirrup 121 .

This device advantageously provides the operating lever with a clearly defined rest position.

On the side of the brake shoe 111B, the transition member or stirrup 121 has a threaded hole 150 (FIG. 10) extending approximately perpendicular to the plane of the disc 110.

A screw shaft 151 is screwed into this screw hole, which contacts the brake piece 117B with a rounded end 152 and is fixed in its position on the transfer member or stirrup 121 by a nut 153.

When the operating lever 137 is pulled in the direction of the arrow F1 in FIG. Piece 117A is disk 1
Press it to 10.

In cooperation with this, in fact, this pressing causes the transfer member 12
1 is moved perpendicularly to the disc 110 in the direction of arrow F2 in FIG.

The disc 110 is therefore a brake piece 117A.

117B and can therefore be braked to a stop if desired.

□ Actually, following the above process, the brake piece 117A
.

117B is pressed against the disc 110 in two steps, in the first step, the cam surface 143 is pressed against the brake piece 117A.
, the sliding transfer member 121 moves in the transfer direction, and the brake pieces 117A, 117B simply contact the disk 110.

In the second stage, the cam surface 143
Apart from the rolling motion without sliding on A,
The transition member performs an oscillating motion around the radial direction of the disk passing through the middle of its central portion, and the brake shoe 117A
, 117B are strongly pressed against the disk 110 at this time.

When the traction force applied to the operating lever 137 is removed, this lever returns to its previously determined rest position under the action of the spring 145 and the disk 110 is released.

According to the alternative structure shown in FIG.
The right-angled end of the spring 37 and the arm 146 of 145 does not fit into the hole drilled in the lever, but into a slot 147 formed along the opening edge 142 of this lever. A shaft 141 carrying a rotation groove 140 is received in the edge 142 .

The end of the arm 146 of the spring 145 is therefore connected to the shaft 141
and the opening edge 142.

According to the alternative structure shown in FIGS. 16 and 17,
The pivoting edge 133 is located on the transfer member 121 in its slot 1
34 and is formed around an axis 160 fixed perpendicular to 34.

According to this type of construction, the elasticity maintaining devices associated with the stirrup 121 are two tension springs 162A.

162B, which, after passing under the stirrup 121, is coupled to the stirrup 121 on the one hand, and on the other hand:
A slot 164A is provided on the stirrup.

164B to the fixed support 111.

Also according to an embodiment of this type, the elastic application and recovery device associated with the operating lever 137 is a tension spring that is passed around one arm of the stirrup 121 from one point of the operating lever to another point. Contains 165.

As shown, this spring 165 has three sections 16 joined together by a straight central section that contacts the stirrup 121.
6.166'.

The invention is, of course, not limited to the form of the embodiments described and illustrated, but includes all alternative types of structures and/or combinations of various elements thereof.

In particular, with respect to the type of construction shown in FIGS. 10 to 17, the position of the pivoting edge and the pivoting groove can be exchanged between the transfer member and the operating lever, respectively, and the pivoting edge is specially If formed on an axis, this special axis should not be on the transfer member (
It can also be fixed well on the operating lever.

Instead of taking the form of a U-shaped stirrup received generally radially on either side of the disc and the fixed support, the transition member has a generally annular configuration and includes the fixed support, the disc, and It surrounds the brake shoe and may be approximately parallel to the chord of the disc near the periphery of said disc.

As for the fixed support, instead of being a U-shaped member, it can also be T-shaped.

Finally, the abutment which serves to determine the rest position of the actuating lever can have a form different from that of the strip-shaped plane described above.

[Brief explanation of the drawing]

FIG. 1 is an axial sectional view of a brake according to the invention. FIG. 2 is a side view of the above-mentioned □ brake as seen in the direction of the arrow ■ in FIG. 3 is a plan view of the brake as seen in the direction of arrow I in FIG. 1; FIG. 4 and 5 are plan views similar to FIG. 3, showing the operation of the brake. FIG. 6 shows the structure of a reference example. 7 and 8 are a plan view and a side view, respectively, viewed in the direction of arrows ■ and ■ in FIG. 6. FIG. 9 is a side view similar to FIG. 2, showing another alternative type of construction. FIG. 10 is a side view in axial section of a portion of another mechanically operated brake according to the invention; FIG. 11 is a plan view of the brake as seen in the direction of arrow X in FIG. FIG. 12 and FIG. 13 are side views seen in the arrow ■ and X1 directions in FIGS. 10 and 11, respectively. FIG. 14 is a partial cross-sectional view of the brake taken along line XIV--XIV in FIG. 10. Figure 15 shows 1. A partial cross-sectional view similar to Figure 14 shows an alternative type of construction. Figure 16 and Figure 1T are Figures 10 and 11, respectively.
Figure 3 shows an alternative type of construction in side and plan views similar to the figures. 10...disc, 11...fixed support,
12A. ) 12B... Window, 13A, 13B...
Brake piece, 18... Transfer member (stirrup), 1
9...Groove, 20.20'-...Both side walls, 20...Abutment part (one side wall), 22'-...
...One end wall on one plane, 26...
Elastic device (spring), 33... Operation lever, 35
...Cam surface.

Claims (1)

[Claims] 1. Rotating disk 1 fixed to a member to which a brake is applied.
0, a fixed support 11, two brake pieces 13A and 13B arranged on both sides of the disk and slidably supported by windows 12A and 12B formed in the fixed support, and a cam. an operating lever t'-33 that cooperates with the one brake piece 13A via a surface 35; the operating lever is rotatably supported by the transfer member 18; and the transfer member is The transfer member is movable relative to the disc in order to transmit the braking action applied by the operating lever to the other brake piece 13B, and the transfer member is an abutment provided on the fixed support. Part 2
the transfer member is swingably supported relative to the fixed support against the action of an elastic device 26 pushing the transfer member toward zero; and the transfer member swings about an instantaneous axis of rotation. the transfer member is located in a radial groove at a radially outer end of the fixed support; The hole 19 is fitted with a receptacle, and the radial slot is located on one end wall 2 on one plane.
2', and the plane is a plane of the disk, a plane extending through the axis of the disk and extending radially through the center of the brake piece. , and both walls 20, 20' extending radially outwardly from the one end wall, the transition member being swingable in a plane parallel to the plane of the end wall. and the abutting portion 20 is formed by one side wall 20 of the both side walls of the slot of the fixed support. A mechanically operated disc brake.