Wearing part with a wear indicator and system for wear testing

• US 9,355,346 B2
• Filed: 03/19/2015
• Issued: 05/31/2016
• Est. Priority Date: 03/19/2014
• Status: Active Grant

• Current Assignee: MAN Truck & Bus AG (Volkswagen AG)
• Original Assignee: MAN Truck & Bus AG (Volkswagen AG)
• Inventors: Butz, Matthias
• Primary Examiner(s): Labaze, Edwyn
• Application Number:
  US14/662,472
• Publication Number:
  US 20150269468A1
• Time in Patent Office: 439 Days
• Field of Search: 235/375, 235/494, 235/487, 235/376, 235/462.11, 235/462.09, 152/154.2, 152/209.1, 152/209.28
• US Class Current: 1/1
• CPC Class Codes: B60C 11/24 Wear-indicating arrangements
• CPC Class Codes: B60C 11/246 Tread wear monitoring systems
• CPC Class Codes: F16D 2065/1332 external ribs, e.g. for cooling or reinforcement
• CPC Class Codes: F16D 65/12 Discs; Drums for disc brakes
• CPC Class Codes: F16D 65/127 characterised by properties of the disc surface; Discs lined with friction material
• CPC Class Codes: F16D 66/02 Apparatus for indicating wear
• CPC Class Codes: G06K 19/06028 using bar codes
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 19/06159 the marking being relief type, e.g. three-dimensional bar codes engraved in a support

Abstract

A wearing part, preferably for a vehicle, contains a wear indicator whose appearance changes depending on a wear condition of the wearing part. The wear indicator contains a multidimensional pattern that is disposed on the wearing part such that different levels of the pattern are exposed depending on the wear condition.

Claims

1. A wearing part, comprising:

a tire having a tread and formed of a tire material;

a wear indicator incorporated in said tread of said tire and whose appearance changes depending on a wear condition of said tire, said wear indicator having a multidimensional pattern that is disposed on said tire such that different levels of said multidimensional pattern are exposed depending on the wear condition, said different levels of said multidimensional pattern each represent a 2D code, said 2D code having black areas formed by said tire material and an intermediate space between said black areas of the 2D code is implemented as a pocket; and

said wear indicator is retrospectively introduced as a separately manufactured component into said pocket.

2. The wearing part according to claim 1, wherein each exposed level of said multidimensional pattern can be read optoelectronically.

3. The wearing part according to claim 1, wherein said multidimensional pattern changes discretely in a direction of wear.

4. The wearing part according to claim 1, wherein said different levels of said multidimensional pattern contain a one-dimensional or two-dimensional machine-readable code.

5. The wearing part according to claim 1, wherein said wear indicator contains information carriers, and a shape of said code changes in a direction of wear such that at least one of a number, shape, position, or color of said information carriers varies.

6. The wearing part according to claim 1, wherein said multidimensional pattern encodes other wear condition-independent properties of the wearing part.

7. The wearing part according to claim 6, wherein a region of said multidimensional pattern that encodes the wear condition-independent properties of the wearing part does not change in a direction of wear.

8. The wearing part according to claim 1, wherein said intermediate space is provided with a contrast means, wherein a wear property of said contrast means corresponds to a wear property of the tire material.

9. The wearing part according to claim 8, wherein said contrast material is white rubber.

10. The wearing part according to claim 8, wherein said contrast material is implemented in a fluorescent form.

11. The wearing part according to claim 1, wherein each exposed level of said multidimensional pattern encodes data that are indicative of the wear condition.

12. The wearing part according to claim 1, wherein the wearing part is for a vehicle.

13. A wearing part, comprising:

a brake disk having a friction surface and formed of a brake disk material;

a wear indicator incorporated in said brake disk and whose appearance changes depending on a wear condition of said brake disk, said wear indicator having a multidimensional pattern that is disposed on said friction surdace such that different levels of said multidimensional pattern are exposed depending on the wear condition, said different levels of said multidimensional pattern each represent a 2D code, said 2D code having areas formed by said brake disk material and an intermediate space between said areas of the 2D code is implemented as a pocket; and

said wear indicator is retrospectively introduced as a separately manufactured component into said pocket.

14. The wearing part according to claim 13, wherein:

said multidimensional pattern is formed by a plurality of juxtaposed pockets that are incorporated in said friction surface; and

at least one of a number, a shape, or a position of said juxtaposed pockets visible in a plan view of said friction surface changes depending on the wear of said friction surface.

15. A wearing part, comprising:

a tire having a tread and formed from a tire material;

a wear indicator incorporated in said tread of said tire and whose appearance changes depending on a wear condition of said tire, said wear indicator having a multidimensional pattern that is disposed on said tire such that different levels of said multidimensional pattern are exposed depending on the wear condition, said different levels of said multidimensional pattern each represent a 1D code, said 1D code having black bars formed by said tire material and an intermediate space between said black bars of said 1D code is implemented as a pocket; and

said wear indicator is retrospectively introduced as a separately manufactured component into said pocket.

16. A vehicle, comprising:

a wearing part, comprising;

a tire having a tread and formed of a tire material; and

a wear indicator incorporated in said tread of said tire and whose appearance changes depending on a wear condition of said tire, said wear indicator having a multidimensional pattern that is disposed on said tire such that different levels of said multidimensional pattern are exposed depending on the wear condition, said different levels of said multidimensional pattern each represent a 2D code, said 2D code having black areas formed by said tire material and an intermediate space between said black areas of the 2D code is implemented as a pocket; and

said wear indicator is retrospectively introduced as a separately manufactured component into said pocket.