Disc brake assembly having shared torque-receiving components

Details Disc brake assembly having shared torque-receiving components Disc brake assembly having shared torque-receiving components

2001-07-30

2002-12-03

Lavinder, Jack (Department: 3683)

Brakes

Wheel

Axially movable brake element or housing therefor

C188S072600

Reexamination Certificate

active

06488132

ABSTRACT:

TECHNICAL FIELD
This invention relates to a disc brake assembly for use with a rotor and suitable for a vehicle, such as an automobile or a commercial vehicle. More specifically, this invention relates to improvements of a disc brake assembly having two types of brakes, i.e., a service disc brake and a parking disc brake.
BACKGROUND OF THE INVENTION
FIGS. 12 and 13
disclose a disc brake assembly in accordance with the prior art. This type of disc brake assembly comprises two fixed-caliper service disc brakes
11
and a mechanical floating-caliper parking disc brake
12
between the two fixed-caliper service disc brakes
11
. The parking disc brake
12
and the service disc brakes
11
are peripherally distributed along a disc rotor
10
with equal intervals.
Calipers
11
a
of the respective service disc brakes
11
are fixed by two installation bolts
14
on a mounting bracket
13
which is a stationary part of the vehicle. The parking disc brake
12
includes a carrier
12
b
that supports a parking brake caliper
12
a
that is fixed on the mounting bracket
13
by second installation bolts
15
.
The service disc brakes
11
include a pair of frictional pads (not shown in the diagram) that are pressed to the side surfaces of the rotor
10
by a fluid pressure operation mechanism built into the service disc brakes
11
, thereby causing braking effect. And the parking disc brake
12
includes a pair of friction pads
12
c
,
12
d
that are pressured to the side surface of the rotor
10
by the mechanical operation mechanism built in the parking disc brake
12
, thereby causing brake effect.
The above-described disc brake has several disadvantages. For example, the parking disc brake
12
has the carrier
12
b
as a component. Thus, both the carrier
12
b
and the second installation bolts
15
that fix the carrier
12
b
on the mounting bracket
13
require higher material costs, working costs, and surface treatment costs.
Also, because the parking disc brake
12
needs to be larger in the circumferential direction of the rotor
10
for the carrier
12
b
, the size of the parking disc brake
12
is increased. Since the disc brake needs to be a bit larger, it has disadvantages in the weight and the manufacturing cost as well as the fuel consumption of the vehicle.
SUMMARY OF THE INVENTION
This invention is intended to improve the above-points. To that end, the invention provides a smaller device with a lower cost. In one embodiment, a disc brake assembly comprises two hydraulic type service disc brakes that press a disc rotor from opposite sides to cause a braking effect, and further including a mechanical floating-caliper type disc brake for a parking brake, wherein the mechanical floating-caliper type parking disc brake is provided between the two hydraulic type service disc brakes which are disposed in the circumferential direction of the disc rotor with a certain interval, and wherein component parts of the two hydraulic type service disc brakes are used as a torque-receiving part of the mechanical floating-caliper type parking disc brake. In an alternate embodiment, the hydraulic type service disc brake is a fixed-caliper type. In another embodiment, the torque-receiving part is a caliper.
In yet another embodiment, the hydraulic type service disc brake is a floating-caliper type. In another embodiment, the torque-receiving part is a carrier.
In still another embodiment, a disc brake further includes tightening parts that attach said mechanical floating-caliper type parking disc brake on a stationary part, the tightening parts also attaching said hydraulic type service disc brake on the stationary part. Finally, in another embodiment, the mechanical floating-caliper type parking disc brake includes a spring chamber type operating mechanism.


REFERENCES:
patent: 3318421 (1967-05-01), Van House et al.
patent: 3321049 (1967-05-01), Swift
patent: 3342291 (1967-09-01), Warwick et al.
patent: 3613515 (1971-10-01), Swande, Jr. et al.
patent: 3651896 (1972-03-01), Fannin
patent: 3837437 (1974-09-01), Martins
patent: 4162720 (1979-07-01), Haraikawa
patent: 5150772 (1992-09-01), Pantale et al.
patent: 5607033 (1997-03-01), Naedler et al.
patent: 5845747 (1998-12-01), Rike et al.
patent: 26 57 015 A 1 (1978-09-01), None
patent: 27 18 003 A 1 (1978-10-01), None
patent: 1 490 795 (1977-11-01), None
patent: 2 012 012 (1979-07-01), None

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