Disk brake for a utility vehicle

Patent metadata

Field	Value
Publication number	US-10443667-B2
Application number	US-201715708790-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Mar 20, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A disk brake with lower cost and improved maintainability is provided. The brake caliper includes at least one actuating device for actuating the disc brake using a moveably guided bridge. The bridge has at least one threaded hole into which an actuating spindle is displaceably located. A brake disk end of the actuating spindle penetrates a caliper closing plate facing the brake disk. The positioning spindle carries a rotatably-mounted pressure piece which presses a brake pad against the brake disc. The opening is sealed by a bellows retained on the brake caliper on one side and on the pressure piece on the other side. A securing ring non-rotatably located on the actuating spindle and rotatably connected to the thrust piece interacts with the bellows during brake application and/or release to maintain a desired air gap between the brake disk and brake pad.

First claim

What is claimed is:

1. A disk brake for a utility vehicle, comprising:
a brake caliper configured to straddle a brake disk, the brake caliper including
at least one application device arranged in a region of the brake caliper configured to receive the at least one brake application device,
a guided bridge configured to displace the at least one application device in a direction toward the brake disk,
an actuating spindle configured to be supported in a bore of the guided bridge,
a closure plate configured to close the region of the brake caliper configured to receive the at least one brake application device, the closure plate having an aperture through which the actuating spindle extends in the direction toward the brake disk,
a thrust piece axially and rotatably supported on the actuating spindle between the actuating spindle and a brake pad configured to be pressed against the brake disk,
a readjustment device configured to adjust an air gap between the brake disk and the brake pad, the readjustment device being operatively connected to the actuating spindle,
a bellows configured to seal off a passage region of the actuating spindle at the closure plate aperture, the bellows having an outer circumferential portion configured to be connected to the closure plate and an inner circumferential portion configured to be connected to the thrust piece, and
a securing ring configured to be located in an non-rotating manner on the actuating spindle and on the thrust piece in an axially secured and relatively rotatable manner.

2. The disk brake as claimed in claim 1 , wherein
the securing ring is held in positively locking fashion on the actuating spindle.

3. The disk brake as claimed in claim 2 , wherein
the securing ring has spring arms configured to lie in axial grooves of the actuating spindle.

4. The disk brake as claimed in claim 3 , wherein
the securing ring is composed of a resilient material.

5. The disk brake as claimed in claim 4 , wherein
the resilient material is spring steel.

6. The disk brake as claimed in claim 5 , wherein
the securing ring has a slot configured to allow the securing ring to be installed in a radial direction onto the actuating spindle.

7. The disk brake as claimed in claim 6 , wherein
the thrust piece has an opening configured to receive a thickened head of the actuating spindle, and
the securing ring has radially oriented tabs configured to engage into a circumferential groove on a wall of the thrust piece opening.

8. The disk brake as claimed in claim 7 , wherein
a diameter of the securing ring prior to installation on the actuating spindle is smaller than a diameter of the thickened head of the actuating spindle.

9. The disk brake as claimed in claim 8 , wherein
the securing ring has axially oriented lugs configured to lie in recesses of a pot-shaped secondary seal, and
an outer circumferential portion the pot-shaped secondary seal is pressed into the opening of the closure plate and an inner circumferential portion of the pot-shaped secondary seal is fastened to the guided bridge.

10. The disk brake as claimed in claim 9 , wherein
the pot-shaped secondary seal has a plurality of recesses arranged circumferentially around a radially inner surface of the inner circumferential portion.

11. The disk brake as claimed in claim 10 , wherein
a circumferential length of each of the plurality the recesses is greater than a circumferential length of each of a plurality of webs between adjacent ones of the plurality of recesses.

12. The disk brake as claimed in claim 11 , wherein
the securing ring has a polygonal circumferential contour.

13. The disk brake as claimed in claim 12 , wherein
the spring arms each have a limb angled radially inward which is configured to lay in a corresponding one of the actuating spindle axial grooves.

14. The disk brake as claimed in claim 13 , wherein
the axial grooves are uniformly spaced about the circumference of the actuating spindle.

15. The disk brake as claimed in claim 4 , wherein
the securing ring is composed of spring steel.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Schoefberger Tobias
• Fischer Rudolf
• Balint Peter
• Klingner Matthias
• Peschel Michael
• Weber Ralf

Classifications

• F16D65/183 Primary

  with force-transmitting members arranged side by side acting on a spot type force-applying member · CPC title

• F16D65/568 Primary

  for synchronous adjustment of actuators arranged in parallel · CPC title

• F16D2121/14

  Mechanical · CPC title

• F16D2125/40

  Screw-and-nut · CPC title

• F16D55/2265 Primary

  the axial movement being guided by one or more pins {engaging bores in the brake support or the brake housing} · CPC title