Mechanical component having a force sensor

Patent metadata

Field	Value
Publication number	US-10252595-B2
Application number	US-201515527786-A
Country	US
Kind code	B2
Filing date	Oct 19, 2015
Priority date	Nov 20, 2014
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A mechanical component for a vehicle, having a measurement region with a surface, and at least one force sensor associated with the measurement region for detecting a force to which the component is exposed. The component (3) has, disposed in the measurement region, a hollow body (3b) with a cavity (4) in which the at least one force sensor (7) can be positioned.

First claim

The invention claimed is:

1. A mechanical component for a vehicle, the mechanical component comprising:
first and second axial shaft regions, the first shaft region having a hollow body that has a cylindrical inner surface that defines a cavity, and the hollow body having an axial end that forms an axial end of the first shaft region,
the first shaft region having a measurement region that extends axially, partially along the hollow body of the first shaft region,
at least one force sensor being supported within the cavity by the inner surface of the hollow body such that the at least one force sensor is disposed within the measurement region for detecting a force to which the mechanical component is exposed, and the axial end of the hollow body contacting an axial end surface of the second shaft region such that the at least one force sensor is axially enclosed within the cavity.

2. The mechanical component according to claim 1 , wherein the mechanical component is formed as a pendulum support of a chassis.

3. The mechanical component according to claim 1 , wherein the mechanical component is formed as either a ball joint or a ball stud which is connected, in an articulated manner, to a pendulum support.

4. The mechanical component according to claim 1 , wherein the mechanical component is formed as a trailer coupling with a coupling hook.

5. The mechanical component according to claim 1 , wherein the hollow body is formed as either a hollow cylinder or a hollow ball with the inner surface.

6. The mechanical component according to claim 1 , wherein the axial end of the hollow body has at least one interface with the axial end surface of the second axial shaft region, and the axial end surface of the second shaft region sealing the at least one force sensor within the cavity.

7. The mechanical component according to claim 6 , wherein the axial end of the hollow body is connected to the axial end surface of the second axial shaft region by a bond which seals the at least one force sensor within the cavity.

8. The mechanical component according to claim 1 , wherein the hollow body has a closed cross section which is disposed in a flux of force of the force.

9. The mechanical component according to claim 5 , wherein the at least one force sensor measuring deformations of the inner surface of the hollow body which result from bending stress in the first shaft region.

10. The mechanical component according to claim 1 , wherein the at least one force sensor is formed either as a strain gauge or a sensor element made of carbon nanotubes.

11. A mechanical component for a vehicle, the mechanical component being one of a rod support, a pendulum support, a control arm and a ball joint, and the mechanical component defining an axis and comprising:
first and second axial shaft regions, the first shaft region having an axial first end and an axially opposite remote end, a cavity extends from the first end of the first shaft region partially through the first shaft region, and the cavity forming a hollow body having a cylindrical inner surface,
the first shaft region having a measurement region,
at least one force sensor being supported on the inner surface of the hollow body and axially arranged within the measurement region for detecting a force to which the mechanical component is exposed, and
the second shaft region being a solid shaft having an axial end that is fixed to the first end of the first shaft region such that the at least one force sensor is enclosed within the cavity in the first shaft region.

12. The mechanical component according to claim 11 , wherein the first and the second shaft regions being coaxially aligned, and the axial end of the second shaft region being welded to the first end of the first shaft region such that an end surface of the axial end of the second shaft region doses the cavity and seals the at least one force sensor within the cavity.

13. The mechanical component according to claim 11 , wherein the remote end of the first shaft region comprises a ball head of a ball joint, the at least one force sensor measuring supporting forces that are applied on the mechanical component by way of the ball head.

14. The mechanical component according to claim 11 , wherein the first shaft region and the second shaft region being formed independent of each other, and the axial end of the second shaft region being fixed to the first end of the first shaft region such that the cavity is radially delimited by the inner surface of the hollow body and the cavity is axially delimited by the axial end of the second shaft region and a radially aligned surface arranged in the first shaft region at an axial end of the measurement region.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Haskamp Klaus
• Klank Michael
• Stratmann Julian
• Vortmeyer Jens
• Hartmann Andreas
• Schwinge Christoph

Classifications

• G01L5/0004 Primary

  Force transducers adapted for mounting in a bore of the force receiving structure (G01L5/0009 takes precedence) · CPC title

• B60G2204/416

  Ball or spherical joints · CPC title

• B60G2204/1162

  directly mounted on the suspension arm · CPC title

• B60G17/019

  characterised by the type of sensor or the arrangement thereof {(B60G17/01941 takes precedence)} · CPC title

• B60G7/005 Primary

  Ball joints (B60G7/006 takes precedence; for steering linkage B62D7/16; ball joints per se F16C11/06) · CPC title