Caliper disc brake of a vehicle, in particular a commercial vehicle, and holding-down spring of such a brake

Patent metadata

Field	Value
Publication number	US-2016108979-A1
Application number	US-201414890437-A
Country	US
Kind code	A1
Filing date	Apr 23, 2014
Priority date	May 13, 2013
Publication date	Apr 21, 2016
Grant date	—

Abstract

A caliper disc brake of a vehicle, in particular of a commercial vehicle, a brake disc, a brake caliper, a brake support plate, a force transmission element, such as, for example, a pad support and/or a pressure plate, which is guided and supported in a well of the brake caliper or of the brake anchor plate, a holding-down spring ( 32 ) for holding down the force transmission element, and a holding-down device ( 36 ). The holding-down device is held by a holding device, pretensions the holding-down spring radially against the force transmission element and pretensions the holding-down spring tangentially in the direction of rotation against the force transmission element during forwards travel. The holding-down spring has two identical spring legs that enclose an angle of more than 95° with the base in the relaxed state and an angle of less than 85° with the respectively adjacent spring leg.

First claim

What is claimed is:

1 . A caliper disc brake of a vehicle, with
a brake disc having an axis of rotation (A), a brake caliper ( 20 ), a brake support plate ( 22 ), a force transmission element, such as, for example, a pad support ( 24 , 26 ) and/or a pressure plate ( 28 ), which is guided and supported in a well of the brake caliper or of the brake support plate, a holding-down spring ( 30 , 32 , 34 ) for holding down the force transmission element, and a holding-down device ( 36 ), which
is held and supported on the caliper by a holding device ( 38 , 40 ),
preloads the holding-down spring radially against the force transmission device, and
preloads the holding-down spring tangentially in the direction of rotation (D) against the force transmission device during forward travel,
wherein the holding-down device has a center line (M) parallel to the axis of rotation, wherein the holding-down spring ( 30 , 32 , 34 ) has two identical spring legs ( 76 , 78 ) and a base that form a trapezoidal central region ( 80 ) which is located in-between and projects radially inward, wherein the two spring legs of the trapezoidal region each enclose an angle (α) of more than 95° with the base in a relaxed state and an angle (β) of less than 85° with a respectively adjacent spring leg.

2 . The caliper disc brake as claimed in claim 1 , wherein in the relaxed state, the holding-down spring ( 30 , 32 , 34 ) in each case extends in an arc with a radius (R 1 ) of 10 mm to 16 mm in a transitional region between the two spring legs of the trapezoidal region and the base thereof and in an arc with a radius (R 2 ) of 4 mm to 9.5 mm in the transitional region between the trapezoidal region and the spring legs ( 76 , 78 ).

3 . The caliper disc brake as claimed in claim 1 , wherein the holding-down spring is symmetrical and, owing to the symmetry, is adapted to be installed in two installation positions rotated by 180° relative to one another.

4 . The caliper disc brake as claimed in claim 1 , wherein the holding-down spring ( 30 , 32 , 34 ) is a leaf spring.

5 . The caliper disc brake as claimed in claim 1 , wherein the holding-down device ( 36 ) rests on the holding-down spring ( 30 , 32 , 34 ) in a bead-shaped first region ( 74 ) that produces the radial preload and rests on said spring in a second region ( 82 ) that produces the tangential preload, and the distance between a central point (M 74 ) of the first region and a central point (M 82 ) of the second region is smaller in a radial direction than in a tangential direction (H<E).

6 . A holding-down spring of a caliper disc brake of a vehicle, having two identical spring legs ( 76 , 78 ) and a base, which form a trapezoidal central region ( 80 ) which is located in-between and projects radially inward, wherein the two spring legs of the trapezoidal region each enclose an angle (α) of more than 95° with base in a the-relaxed state and an angle (β) of less than 85° with a the-respectively adjacent spring leg.

7 . The holding-down spring as claimed in claim 6 , wherein in the relaxed state, the holding-down spring extends on each of two opposite sides in an arc with a radius (R 1 ) of 10 mm to 16 mm in a transitional region between the two spring legs of the trapezoidal region and the base and in an arc with a radius (R 2 ) of 4 mm to 9.5 mm in a transitional region between the trapezoidal region and the spring legs ( 76 , 78 ).

8 . The holding-down spring as claimed in claim 6 , wherein the holding-down spring is symmetrical and, owing to the symmetry, is adapted to be installed in two installation positions rotated by 180° relative to one another.

9 . The holding-down spring as claimed in claim 6 , wherein the holding-down spring is a leaf spring.

Assignees

• Wabco Europe Bvba

Inventors

• Falter Wolfgang
• Friebus Oliver
• Jåger Hellmut
• Jungmann Hans-Christian

Classifications

• F16D55/226

  in which the common actuating member is moved axially {, e.g. floating caliper disc brakes} · CPC title

• F16D65/092

  for axially-engaging brakes, e.g. disc brakes · CPC title

• F16D65/0978 Primary

  acting on one pad only · CPC title

• F16D55/22 Primary

  by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads · CPC title