U.S. patent application number 09/736607 was filed with the patent office on 2001-08-16 for spot-type disc brake for an automotive vehicle.
Invention is credited to Betzer, Rolf-Dieter, Schorn, Michael, Storzel, Karl, Sundheim, Ralf, Thiel, Rudolf.
Application Number | 20010013448 09/736607 |
Document ID | / |
Family ID | 26006358 |
Filed Date | 2001-08-16 |
United States Patent
Application |
20010013448 |
Kind Code |
A1 |
Schorn, Michael ; et
al. |
August 16, 2001 |
Spot-type disc brake for an automotive vehicle
Abstract
The invention relates to a spot-type disc brake for automotive
vehicle with a floating caliper (2) displaceably borne on a
vehicle-fixed brake support (1) and bridging a brake disc as well
as brake pads (7,8) arranged on both sides of the brake disc, where
the brake pads (7,8) are axially displaceably guided in the brake
support (1). To achieve a particularly radially rattle-free
fixation of the brake pads (7,8) as well as the floating caliper
(2) on the brake support (1), it is provided to support the
floating caliper (2) on its, with respect to the vehicle, outside
on the brake support (1) through the outer brake pad (7). To this
end, the outer brake pad (7) is radially locked on the brake
support (1), and the outer brake pad (7) itself on the
corresponding housing leg (13).
Inventors: |
Schorn, Michael; (Bad
Camberg, DE) ; Storzel, Karl; (Dreieich, DE) ;
Thiel, Rudolf; (Frankfurt, DE) ; Betzer,
Rolf-Dieter; (Eschborn, DE) ; Sundheim, Ralf;
(Frankfurt, DE) |
Correspondence
Address: |
Joseph V. Coppola, Sr.
Rader, Fishman & Grauer PLLC
Suite 140
39533 Woodward Avenue
Bloomfield Hills
MI
48304
US
|
Family ID: |
26006358 |
Appl. No.: |
09/736607 |
Filed: |
December 14, 2000 |
Current U.S.
Class: |
188/71.1 ;
188/72.1 |
Current CPC
Class: |
F16D 65/097 20130101;
F16D 65/0979 20130101 |
Class at
Publication: |
188/71.1 ;
188/72.1 |
International
Class: |
F16D 055/00; F16D
055/08 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 14, 1999 |
DE |
P199 60 363.4 |
Jul 12, 2000 |
DE |
P100 33 834.8 |
Claims
1. Spot-type disc brake for automotive vehicles with a floating
caliper (2) displaceably borne on a vehicle-fixed brake support (1)
and bridging a brake disc as well as brake pads (7,8) arranged on
both sides of the brake disc, where the brake pads (7,8) are
axially displaceably guided in the brake support (1), characterized
in that at least one brake pad (7) is radially fixed in the brake
support (1), wherein the floating caliper (2) is radially supported
on this brake pad (7).
2. Spot-type disc brake according to claim 1, characterized in that
the floating caliper (2) comprises a first housing leg (12) with at
least one actuation unit (14) on one side of the brake disc and a
second housing leg (13) with an adjacent brake pad (7) on the other
side, wherein both housing legs (12,13) are connected to each other
via a bridge section (15) and the second housing leg (13) is
radially supported on the brake support (1) through the brake pad
(7).
3. Spot-type disc brake according to one of the preceding claims,
characterized in that a brake pad (8) connected to the actuation
unit (14) is radially removably supported in the brake support
(1).
4. Spot-type disc brake according to one of the preceding claims,
characterized in that between each brake pad (7,8) and the brake
support (1) at least one gliding element (24) is arranged which
prevents a direct contact between brake pad (7,8) and brake
support.
5. Spot-type disc brake according to claim 4, characterized in that
the gliding element (24) radially rigs the brake pad (7,8) with the
brake support (1).
6. Spot-type disc brake according to one of the claims 4 or 5,
characterized in that that the gliding element (24) is designed as
a one-piece sheet metal element.
7. Spot-type disc brake according to claim 2, characterized in that
the floating caliper (2) is radially fixed on the brake pad (7) by
means of at least one locking pin (18) arranged on the second
housing leg (13).
8. Spot-type disc brake according to one of the preceding claims,
characterized in that the brake pad (7) arranged on the second
housing leg (13) is axially rigged on the second housing leg (13)
by means of a spring element (23).
9. Spot-type disc brake according to claim 7, characterized in that
the second housing leg (13) is radially positively supported on the
spring element (23), wherein the spring element (23) is fixed on
the brake pad (7).
10. Spot-type disc brake according to claim 9, characterized in
that the spring element (23) is radially snapped into an opening or
recess (33, 37) on the second housing leg (13).
11. Spot-type disc brake according to claim 9, characterized in
that element (23), with a projection (35,36) is radially snapped
into a corresponding bore or passage opening (37) on the second
housing leg (13).
Description
[0001] The invention relates to a spot-type disc brake for
automotive vehicles with a floating caliper displaceably borne on a
brake support fixed to the vehicle, the caliper embracing a brake
disc as well as brake pads arranged on both sides of the brake disc
and the brake pads being axially displaceably guided in the brake
support.
[0002] A spot-type disc brake of this kind is known e.g. from U.S.
Pat. No. 5,984,163. Here the brake pads are axially displaceably
guided on a brake support and, at the same time, radially secured
on the support. Further on, the brake pads are radially rigged with
respect to the brake support by means of spring sheets in order to
hold the brake pads constantly in contact with the brake support.
The brake caliper, being a floating caliper, is axially
displaceably borne on the brake support. In particular with high
brake caliper weights, such an arrangement tends to undesired
rattling noises which are caused by judder, particularly during
driving on bad-road stretches. Here the suspension of the brake
pads or the brake caliper, respectively, versus the brake support
turns out to be insufficient. Furthermore, the spot-type disc brake
is hard to assemble, for the brake pads and the brake caliper can
only be fixed to the brake support in several individual working
steps.
[0003] From DE 4 318 744 C1, also a floating caliper disc brake is
known which provides a brake carrier integrated into the steering
knuckle of the vehicle for supporting the peripheral forces and for
guiding the brake pads. In order to simplify the final assembly,
the floating caliper with brake pads fixed to it is delivered as a
pre-assembled unit. The brake pads are each releasably fixed to the
brake caliper by means of leaf springs. The leaf spring of
the--with respect to the vehicle--outer brake pad additionally
serves to radially bias the brake caliper relative to the brake
carrier. By this means, the floating caliper is supposed to be
radially supported relative to the brake carrier via the leaf
spring fixed to the outer brake pad. In particular with heavier
floating caliper embodiments and during strong judder, however, the
floating caliper is set into oscillation that cannot be compensated
by the leaf spring. The arrangement thus tends to generating
undesired rattling noises.
[0004] Based on this, the objective of the invention consists in
improving the guidance of the brake pads as well as of the floating
caliper on a vehicle-fixed brake support for a generic spot-type
disc brake in a way that undesired rattling noises are avoided and,
at the same time, an easy-motion floating caliper guidance is
attained.
[0005] This objective is achieved by means of the features of
patent claim 1. Accordingly, the spot-type disc brake for
automotive vehicles comprises a floating caliper displaceably
guided on a vehicle-fixed brake support, which caliper embraces a
brake disc as well as brake pads arranged on both sides of the
brake disc. The brake pads are also axially displaceably guided in
the brake support as one brake pad is radially fixed in the brake
support and the floating caliper is radially supported on this
brake pad. Here, the floating caliper is preferably radially locked
on the brake support, maintaining a limited play via the brake pad.
Thus, the degree of freedom of the brake pads and the brake
caliper, respectively, is strongly limited in radial direction,
which greatly reduces the proneness of the entire spot-type disc
brake to rattling.
[0006] An advantageous refinement of the spot-type disc brake is
achieved in that the floating caliper has a first housing leg with
at least one actuation unit on one side and a second housing leg
with an adjacent brake pad on the other side of the brake disc. The
two housing legs are connected to each other via a bridge section
spanning the brake disc, where the second housing leg is radially
supported on the brake support via the brake pad. The second
housing leg is--with respect to the vehicle--usually located on the
outside while the first housing leg with the actuation unit is
arranged on the inside. This means that on the inside, i.e. on the
first housing leg, the floating caliper is directly borne on the
brake support, in particular by means of a pin guide, and on the
outside, i.e. on the second housing leg, it is radially fixed to
the brake support via the brake pad there.
[0007] A preferred embodiment of the spot-type disc brake results
from the fact that an inner brake pad connected to the actuation
unit is radially removably supported in the brake support. Thus,
the two brake pads are designed differently. While the inner brake
pad is radially removably arranged in the brake support, the outer
brake pad is radially locked in the brake support. Nevertheless,
both brake pads are axially displaceably guided in the brake
support. By way of the different design of the brake pads,
particularly the inner brake pad can be easily mounted radially,
preferably together with the brake caliper.
[0008] In order to improve the gliding or guiding properties,
respectively, between the brake pad and the brake support, it is
provided that between each of the brake pads and the brake support
at least one gliding element is placed that prevents a direct
contact between brake pad and brake support. Such a gliding element
can be specifically designed so that the brake pads are freely
displaceable along the gliding element for any state of operation
of the brake.
[0009] The gliding element, in particular, is designed in a way
that it radially rigs the brake pad, which is radially fixed to the
brake support, with the latter. In this regard, an additional
spring for rigging the brake pad on the brake support can be
dropped because the brake pad is already fixed without rattling
onto the brake support by means of the gliding element.
Advantageously, the gliding element is designed as a one-piece
sheet metal element, for as a sheet metal element, regarding a
favorable manufacturablility, it can easily and flexibly be adapted
to the respective design demands.
[0010] An advantageous embodiment of the radial fixation of the
floating caliper to the outer brake pad results from the fact that
the floating caliper is radially fixed to the outer brake pad by
means of at least one locking pin located on the second housing
leg. The locking pin extends axially in a passage opening of the
second, outer, housing leg and, at the same time, protrudes with
little play into a bore of the outer brake pad. By this means, the
floating caliper is fixed with respect to the outer brake pad,
where the outer brake pad itself is radially fixed to the brake
support.
[0011] A further variant of the spot-type disc brake is attained in
that the brake pad arranged on the second housing leg, i.e. on the
outside, is axially rigged on the second housing leg by means of a
spring element. Thus, the outer brake pad is continuously kept in
contact with the second housing leg. An additional simplification
results from radially supporting the second housing leg directly on
the spring element, where the spring element itself is fixed to the
brake pad. An additional locking pin can be eliminated for such a
case. The spring element can particularly easily be radially
snapped into a groove-like recess on the second housing leg.
Alternatively, the spring element can be radially anchored in an
associated bore on the second housing leg. A double function is
assigned to both embodiments of the spring element. On the one
hand, the outer brake pad is axially kept in abutment on the outer
housing leg and, on the other hand, the radial lock of the brake
pad on the outer housing leg is warranted.
[0012] Advantageous embodiments of the invention are depicted by
means of the figures and are explained below in more detail.
[0013] In the drawings,
[0014] FIG. 1-3 show three views of a spot-type disc brake with a
radial support of the floating caliper on the, with respect to the
vehicle, outer brake pad;
[0015] FIG. 4-5 show two detail views (Z, Y) of the brake pads from
FIG. 1-3 guided in the brake support;
[0016] FIG. 6 shows a partial sectional view along line X-X of a
first variant of the radial support of the floating caliper on the
brake pad by means of a locking pin;
[0017] FIG. 7a-b show two partially sectional views of a second
embodiment regarding the radial support of the floating caliper by
means of a spring element;
[0018] FIG. 8-9 show two partial views of a further embodiment of a
spring element according to FIG. 7a,b;
[0019] FIG. 10a-b show two sectional views of a spot-type disc
brake with a refined variant of the spring element; and
[0020] FIG. 11a-b show two partially sectional views of a spot-type
disc brake with a further variant of the spring element.
[0021] From FIG. 1-6, a first embodiment of a spot-type disc brake
for automotive vehicles is evident, which comprises a floating
caliper 2 displaceably borne on a brake support 1 which is
installed in a vehicle-fixed way. Frequently the brake support,
being a separate part, is screwed onto a steering knuckle via
fixing bores. For the realization of the invention, however, it is
possible as well to integrate the brake support 1 directly into the
steering knuckle. The brake support 1 comprises, beside a base
section 1, carrier arms 6, each adjoining to the base section 5 on
the sides, which carrier arms axially protrude beyond a non-shown
brake disc at its edge. The carrier arms serve for support and
guidance of the brake pads 7,8. The brake pads 7,8, with lugs 9,10
on the sides in peripheral direction, are each accommodated in a
correspondingly designed guiding groove 11 in the carrier arm 6.
Accordingly, the brake pads are, regarding the brake disc on the
one hand, axially precisely guided and, in peripheral direction on
the other hand, supported on the carrier arms. By this means, the
occurring peripheral brake forces are, starting from the brake pads
7,8, transferred onto the carrier arms 6. Particularly
advantageously, the lugs 9,10 on the sides on the brake pads 7,8
together with the corresponding guiding grooves 11 are designed in
a way that the occurring peripheral brake forces are, at least at
higher braking loads, diverted via both carrier arms 6 into the
vehicle-fixed steering knuckle.
[0022] The floating caliper 2 is usually axially displaceably via
pin guides 4 arranged on the brake support 1 and protrudes in a
U-shape the radially outer edge of a non-depicted brake disc as
well as the brake pads 7,8 arranged on both sides of the brake
disc. On the one, with respect to the vehicle, inner side of the
brake disc, the floating caliper 2 has a first housing leg 12 with
at leas on actuation unit 14. For the embodiment variant of the
spot-type disc brake in FIG. 1-6, two actuation units 12 are
accommodated in the first, inner, housing leg 12 in order to reach
higher clamping forces for the spot-type disc brake. The
realization of the idea of the invention is independent of the
exact embodiment of the actuation unit 14. Thus, the actuation unit
can for instance be operated hydraulically, electro-hydraulically,
mechanically, electro-mechanically, or purely electrically. Upon
activation of the actuation unit or actuation units 14,
respectively, the inner brake pad 8 is pressed directly against the
brake disc and the outer brake pad 7 indirectly by means of axial
displacement of the floating caliper 2. The brake clamping force is
transferred, starting from the inner housing leg 12, through a
bridge section 15 axially protruding the brake disc onto the other
side of the brake disc into the second, outer, housing leg 13.
[0023] The two brake pads 7,8, especially regarding their lugs 9,10
on the sides, are designed differently. Usually, the individual
brake pads 7,8 comprise a carrier plate 20, on which also the lugs
are formed on the sides, as well as a friction lining 21 for
frictional abutment on the brake disc. The inner brake pad 8 is
connected to the actuation units 14 and thus held within the
floating caliper 2. By this means, the floating caliper 2 presents,
together with the inner brake pad 8, a favorable, pre-assembled
assembly unit regarding final assembly. To this end, the lugs 10 on
the sides of the inner brake pad 8 are designed substantially
L-shaped and can consequently be effortless radially installed or
uninstalled, respectively, within the brake support 1. In contrast
to this, the lugs 8 on the sides of the outer brake pad 7 provide
protrusions 16 in peripheral direction which each extend into a
corresponding undercut 17 in the guiding groove 11. By this means,
the outer brake pad 7 is arranged axially displaceably within the
brake support 1, however, radially fixed with respect to the brake
support. In order to leave only a little radial moving clearance
for the outer brake pad 9 with its lugs 9 in the guiding groove 11,
it is recommended to dimension the respective tolerance parameters
of the guiding groove 11 and the lugs 9 on the sides, respectively,
small. Undesired rattling noises between brake pad 7 and brake
support 1 can hereby be suppressed in a first step.
[0024] For radial support of the floating caliper 2 on the brake
support 1, a locking pin 18 is provided, which, in a passage
opening 19, axially protrudes through the outer housing leg 13.
Further on, the locking pin extends axially into a corresponding
opening 22 of the carrier plate 20 of the axially outer brake pad
7. The opening 22 in the carrier plate is preferably designed as a
punch hole, as another shaping of sheet metal, or as a borehole.
The locking pin 18 is advantageously screwed into the outer housing
leg 13. However, it can also be releasable fixed to the outer
housing leg in a different way, for example by means of inserting,
stamping, snapping, or the like. Through the radial connection of
the floating caliper 2 to the outer brake pad 7 by means of the
locking pin 18, the floating caliper 2 is thus on the outside
indirectly also radially locked with respect to the brake support
1. In total, the floating caliper is therefore fixed on the inside
through the pin guides 4 and radially on the outside on the brake
support through locking pin 18 as well as brake pad 7.
[0025] In order to improve the free displaceability of the two
brake pads 7,8 in the brake support 1 or the guiding grooves 11,
respectively, in the guiding grooves 11 gliding elements 24 are
arranged which, at least under normal conditions, prevent a direct
contact between brake pad 7,8 and brake support 1. The gliding
element 24 particularly covers all guiding and abutment surfaces
between brake pad 7,8 and brake support 1. Such a gliding element
24 is especially manufactured of a material with a low friction
coefficient, for instance sheet metal or plastic. By means of
formed-on lugs 25, the gliding element 24 can be fixed within the
guiding groove 11 to the carrier arm 6. Further on, the gliding
element 24 abuts each of the lugs 9,10 of the brake pads 7,8 with
spring sections 241, 24b under spring bias in order to keep them
rattle-free in the guiding grooves 11. Due to the good gliding
properties of the gliding element 24, the free displaceability of
the brake pads 7,8 is not compromised by this means. Preferably,
the gliding element 24 is a one-piece sheet-metal part which can be
manufactured by simple shaping of sheet metal and thus can flexibly
be adapted to different guiding grooves 11. Due to the arched
spring section 24b, not only the outer brake pad 7 but rather also
the floating caliper 2, which is coupled with the brake pad 7 via
the locking pin 18, can be radially rigged rattle-free with respect
to the brake support 1. Additional springs, as frequently utilized
in the prior art, can advantageously be eliminated.
[0026] For axial fixation of the outer brake pad 7 on the outer
housing leg 13, additionally a spring element 23 is provided. This
spring element is preferably manufactured as a spring sheet metal
strip which, with its free ends 26, is fixed, e.g. by means of
rivets, to the carrier plate 20 of the outer brake pad 7. For
example, a rivet or a stamped protrusion formed onto the carrier
plate 20 can serve as a fastening element 27. The spring element 23
comprises a noose-shaped center section 28 with adjoining spring
arms 29 on the sides. The outer housing leg 13 can be radially
threaded into the noose-shaped center section 28 with a radially
extending finger-shaped nose 30 during the radial assembly of the
floating caliper. For installation of the floating caliper 2 on the
brake support 1, however, it is first necessary to axially insert
the outer brake pad 7 with its lugs 9 into the respective guiding
grooves 11. As particularly evident in FIG. 10b, the floating
caliper 2 is installed from the outside with its finger-shaped nose
30, where, caused by the movement of the floating caliper 2 in
installation direction 31, the nose 30 threads into the
noose-shaped center section 28. To this end, the center section 28
glides during radial installation along a ramp 32 on nose 30.
During gliding along the ramp 32, the center section 28 is axially
deflected by a distance H. This distance thus determines the amount
of pressing force, with which the outer brake pad 7 is axially
pressed onto the outer housing leg 13 by means of the spring
element 23. To ensure a defined pressing force, it is of advantage
to design the spring arms according FIG. 10a curved or S-shaped in
order to attain a small spring rate, i.e. a soft spring. This
presents the advantage of no need to mechanically machine the outer
housing leg 13 at nose 30 in order to achieve a pre-determined
spring bias force even with a coarse, i.e. cast, surface of the
finger-shaped nose.
[0027] An embodiment further developed with respect to the
one-piece spring element 23 is depicted in FIGS. 11a-b. Here, the
outer brake pad 7 is axially held on the finger-shaped nose 30 of
the floating caliper 2 by means of two separate spring elements
23', 23". The individual spring elements 23', 23" are each fixed
with a first end 38', 38" at the carrier plate 20 of the outer
brake pad 7, preferably by means of riveting, screwing, gluing, or
the like onto a fastening element 27. Such a fastening element can
be carried out as a rivet, a splined pin, a screw or a stamped
protrusion of the carrier plate. Thus, the two spring elements 23',
23" are tightly connected to the carrier plate 20. On their
opposite, second, end 39', 39" the two spring elements 23', 23"
each abut the finger-shaped nose 30 of the floating caliper 2 under
axial bias. To this end, preferably two steps 40', 40" are provided
on the finger-shaped nose 30, on each of which one of the two
spring ends 39', 39" is seated. These steps 40', 40" are
particularly already formed during casting. Between the two ends
39', 39" and 40', 40" a spring arm 29', 29" extends for each spring
element 23',23". This spring arm 29', 29" is preferably designed
curved or S-shaped, in order to attain a small spring rate, i.e. a
soft spring element 23', 23". The pressing conditions between outer
brake pad 7 and housing leg 13 can thus be very precisely adapted
to the respective requirements. The utilization of two spring
elements 23', 23" additionally permits a tolerance compensation
between outer brake pad and floating caliper 2 and makes therefore
possible an improved abutment of the outer brake pad 7 on the outer
housing leg 13. Regarding the above-described, basic course of
installation of the floating caliper 2 on the brake support 1,
nothing changes by the two-part design of the spring element 23',
23". Just on the second ends 39', 39" of the individual spring
elements 23', 23", angled tongues 41 are formed in order to better
be able to thread the finger-shaped nose 30 between the ends 39',
39" during radial installation of the floating caliper.
[0028] For conclusion of the assembly of a spot-type disc brake
according to FIG. 1-6, the locking pin 18 is axially inserted into
the passage opening 19 of the outer housing leg 13. The floating
caliper is hereby finally radially supported with respect to the
outer brake pad 7 or the brake support 1, respectively.
[0029] From FIG. 7-9, further variants of the radial support of the
axially outer housing leg 13 on the outer brake pad are evident.
Here, the anyway existing spring element 23 is utilized for axially
biasing the outer brake pad 7 on the outer housing leg 13. In
principle, between the spring element 23 and the outer housing leg
13, a positive lock is generated, which radially fixes the floating
caliper 2 to the outer brake pad 7 and thus to the brake support 1.
According to a first embodiment according to FIG. 7a-b, the
noose-shaped center section 28' of the spring element 23 extends in
a groove-shaped recess 33 of the finger-shaped nose 30. To ensure
precise axial pressing forces between outer brake pad 6 and housing
leg 13, it can be of advantage to form the groove-like recess 33
through mechanical remachining with highly true-to-size precision.
Furthermore, it proves to be favorable for the pressing conditions
to provide a dimple 34 in the center section 28'. Due to the course
of the center section 28' within the groove-like recess 33, the
floating caliper 2 is radially fixed with respect to the spring
element 23 and thus also to the axially outer brake pad 7.
[0030] Another possibility for a radially positive lock of a spring
element 23 on a housing leg 13 is depicted in FIG. 8,9. Here, the
noose-shaped center section 28" comprises at least one projection
35, 36, which each extends positively into a passage opening or a
bore 37, respectively, in the finger-shaped nose 30. The projection
can be designed as a closed stamped sheet metal protrusion 35 or an
open stamped sheet metal protrusion 36. In both cases, the floating
caliper 2 is radially positively locked by means of the spring
element 23 fixed to the brake pad 7.
[0031] After all, the embodiments of the radially positive
connection between spring element 23 and axially outer housing leg
13 listed in FIGS. 7-9 are not complete. Of course, further
variants of such a positive connection can be realized which are
covered by the scope of the patent claims.
[0032] The support or lock of the floating caliper 2 on the outer
brake pad 7 and thus on the brake support 1 according to the
invention presents itself in particular for floating caliper
designs which have a high weight and are therefore prone to
generating undesired rattling noises. Hence, floating caliper
designs with two actuation units 14 each are included in the
drawings. In principle, however, the idea of the invention is not
exclusively limited to such embodiments of spot-type disc brakes.
The measures according to the innovation can rather be realized on
all spot-type disc brakes according to the features of the patent
claims.
[0033] The invention relates to a novel concept of a spot-type disc
brake with the following invention features which also are evident
from the FIGS. 1-6:
[0034] The spot-type disc brake 1 comprises a spring 2, which pulls
the axially outer brake pad 3 against a fist side of a brake
housing 4. Here, the spring 2, which is rigidly connected to the
brake pad 3, has a U-shaped opening 5 into which the housing 4
threads completely during assembly with a finger-shaped nose 6.
[0035] The axially outer or fist-sided brake pad 3 comprises lugs
7,8 on the sides for the transfer of brake force onto a brake
support 9, which lugs engage axially displaceably in accordingly
profiled recesses 10,11 in the brake support 9. In order to reduce
friction forces between the brake pads 3,12 displaceably
accommodated in the brake support 9, a gliding metal sheet 13 is
inserted into each of the recesses 10,11. Additionally, the gliding
metal sheet 13 rigs the brake pads 3, 12 with respect to the brake
support 9.
[0036] The brake housing 4 is, in radial direction regarding the
brake disc axis, supported in a known way in three points with
respect to the brake support. These three points are formed by the
two pin guides 14 as well as a locking pin 15 which is arranged on
the axial outside of the brake housing 4. The locking pin 15
protrudes axially through the finger-shaped nose 6 of the brake
housing 4 and extends at the same time in a corresponding opening
16 in the axially outer brake pad 3. By this means, the brake
housing 4 is radially fixed on the outer brake pad.
[0037] The piston-sided or axially inner brake pad 12 is connected
through a spring arrangement with the brake housing 4 or with a
hydraulic actuation unit of the brake housing 4, respectively.
Thus, inner brake pad 12 and brake housing 4 form an assembly unit
which, during assembly of the spot-type disc brake 1, is inserted
into the outer brake pad previously axially inserted into the brake
support 9. Accordingly, the finger-shaped nose 6 is threaded into
the U-shaped opening of the spring 2, and the locking pin 15 is
inserted. In this way, the brake housing 4 is positively fixed to
the brake support through the brake pad 3.
* * * * *