BRAKE CALIPER UNIT

Abstract

The disclosure relates to a brake caliper unit for disc brakes, comprising a carrier forming a caliper, a pneumatically operated piston/cylinder assembly, and a brake lining, wherein a piston and a cylinder have a non-circular cross section and are designed as a tandem piston assembly.

Claims

1. A brake caliper unit for disc brakes, comprising a carrier forming a caliper, a pneumatically operated piston/cylinder assembly, and a brake lining, wherein a piston and cylinder have a non-circular cross section and are designed as a tandem piston assembly.

2. The brake caliper unit according to claim 1, wherein the piston and the corresponding cylinder have an elliptical cross section.

3. The brake caliper unit according to claim 1, wherein at least two piston/cylinder assemblies are arranged side by side.

4. The brake caliper unit according to claim 1, wherein the same is designed for a floating arrangement on a wheel assembly.

5. The brake caliper unit according to claim 1, wherein the carrier includes an accommodation chamber for the piston/cylinder assembly.

6. The brake caliper unit according to claim 1, wherein the piston for advancing the brake lining is designed as a pot-shaped piston.

7. The brake caliper unit according to claim 1, wherein the piston/cylinder unit comprises two pot-shaped piston units which are guided in one another, wherein the interior forms a cylinder chamber for a piston and is penetrated by a piston rod and forms a further piston on its outer surface so that the outer pot-shaped piston unit forms in its interior a cylinder chamber for this further piston.

Description

DRAWINGS

[0020] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0021] Further advantages and features of the disclosure will become apparent from the following description with reference to the attached drawings, wherein it is shown by:

[0022] FIG. 1 a lateral view of one embodiment of a brake caliper unit according to the disclosure;

[0023] FIG. 2 a section along line A-A according to FIG. 1K;

[0024] FIG. 3 a partial sectional plan view of the brake caliper unit according to FIG. 1;

[0025] FIG. 4 a partial sectional exploded view of the piston/cylinder assembly according to the disclosure.

[0026] Identical elements in the Figures are marked with identical reference signs.

DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0028] The FIGS. 1 to 3 show the general structure of a brake caliper unit 1 that consists of a carrier 2 in which accommodation chambers 3 for brake pistons are formed. In the known manner, the brake caliper unit 1 runs over a brake disc 4, which is only indicated in FIG. 1 and which passes through between two opposite brake piston accommodation chambers 3, as shown by the FIGS. 2 and 3. In the illustrated embodiment, the carrier 2 is of two-part design, and the two halves are connected by screws 5.

[0029] FIG. 4 shows the structure of a brake piston unit according to the disclosure, which is arranged in an accommodation chamber 3 in the carrier.

[0030] With its outer pressure surface 11, the element called brake piston 10 presses a brake lining (not shown) against the disc. For this purpose, the brake piston 10 is moved by a piston 12, which is guided in a cylinder 13 and which is connected via its piston rod 16 to the brake piston 10 at the connection 19. Pressure medium lines 15 are formed in the cylinder 13 to bring the pressure medium to the region in the interior of the cylinder 13 and under the piston 12. Thus the piston 12 is advanced and also pushes the brake piston 10 forward. The piston rod 16 penetrates through the cylinder head plate 17, which has an opening 18 for this purpose. The cylinder head plate 17 is arranged on the cylinder 13 in a manner closing the cylinder. If the piston 12 is advanced in the cylinder due to the effect of the pressure medium, the brake piston 10 is also advanced via the piston rod 16 that is fixed in the connection 18 of the brake piston 10. This creates a further space between the cylinder head plate 17 and the interior of the brake piston 10. Additional pressure medium is fed into this resulting gap via a pressure medium line 20 and generates an additional pressure at this point so that brake piston 10 can exert an additional force. The effective piston surfaces add up so that a lower pressure is required for the same braking force.

[0031] In the illustrated embodiment, three elliptical accommodation chambers 3 for the brake piston units are formed in the carrier. The elliptical contour allows a large piston surface and thus a large power transmission while simultaneously preventing rotation. The individual elements of the piston unit can be turned non-round, i.e. elliptical, so that the manufacture of the individual brake piston units and the accommodation spaces in the caliper is very simple and cheap.

[0032] The embodiments described only serve the purpose of explanation and are not limiting.

[0033] The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.