High load capacity wheel force transducer

Patent metadata

Field	Value
Publication number	US-9649879-B2
Application number	US-201514672590-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Mar 30, 2015
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

The disclosure is directed to a wheel force transducer mountable on a rotatable wheel in a machine, where the wheel force transducer includes an inner flange configured to be connected to an axle shaft of the machine, an outer flange configured to be connected to the wheel of the machine, a tube connected to the inner flange on one end and connected to the outer flange on the other end; and at least one force sensor mounted on the tube, where at least one force sensor is configured to provide data for at least one of the forces and moments subjected to the wheel.

First claim

We claim:

1. A wheel force transducer mountable on a rotatable wheel in a machine, comprising:
an inner flange coupled to an axle shaft flange, the axle shaft flange circumferentially surrounding an end portion of an axle shaft of the machine, and the inner flange positioned axially exterior to the axle shaft and the axle shaft flange;
an outer flange coupled to a wheel flange of the machine;
a tube connected to the inner flange at a tube first end and connected to the outer flange at a tube second end, the tube disposed between the axle shaft flange and the wheel flange such that the inner flange, the tube, and the outer flange are positioned axially exterior to the axle shaft, and the tube extends axially away from the axle shaft towards the wheel flange; and
at least one force sensor mounted on the tube, wherein the at least one force sensor is configured to provide data for at least one of forces and moments subjected to the wheel.

2. The wheel force transducer according to claim 1 , further comprising:
a wall flange arranged inside the tube.

3. The wheel force transducer according to claim 2 , wherein the wall flange is located closer to the outer flange with respect to the inner flange.

4. The wheel force transducer according to claim 2 , wherein the wall flange includes at least one hole to guide wires from the sensors.

5. The wheel force transducer according to claim 1 , wherein a width of the outer flange is equal to or thicker than a width of the inner flange.

6. A wheel force measurement system, comprising:
an inner flange coupled to an axle shaft flange, the axle shaft flange circumferentially surrounding an end portion of an axle shaft of a machine, and the inner flange positioned axially exterior to the axle shaft and the axle shaft flange;
an outer flange coupled to a wheel flange;
a tube connected to the inner flange at a tube first end and connected to the outer flange at a tube second end, the tube disposed between the axle shaft flange and the wheel flange such that the inner flange, the tube, and the outer flange are positioned axially exterior to the axle shaft, and the tube extends axially away from the axle shaft towards the wheel flange;
at least one force sensor mounted on the tube, wherein the at least one force sensor is configured to provide data for at least one of forces and moments subjected to the wheel;
the wheel flange configured to mechanically connect the outer flange to the wheel; and
a data acquisition system communicatively connected to the at least one sensor to process the data for at least one of forces and moments subjected to the wheel.

7. A machine comprising the wheel force measurement system according to claim 6 .

8. The wheel force measurement system according to claim 6 , further comprising:
an electronics housing configured to communicatively connect the sensor to the data acquisition system.

9. The wheel force measurement system according to claim 6 , wherein the data acquisition system is configured to calculate forces and moments subjected to the wheel based on signals obtained by the sensor during rotation of the wheel.

10. The wheel force measurement system according to claim 9 , wherein the data acquisition system is configured to compensate for the forces and the moments of the wheel based on a preload of the wheel.

11. The wheel force measurement system according to claim 9 , wherein the data acquisition system is configured to compensate for the forces and the moments of the wheel based on an offset angle of the wheel.

12. The wheel force measurement system according to claim 6 , further comprising:
a wall flange arranged inside the tube.

13. The wheel force measurement system according to claim 12 , wherein the wall flange is located closer to the outer flange with respect to the inner flange.

14. A method of measuring forces and moments of a rotatable wheel of a machine, comprising:
mounting a wheel force transducer on the wheel, wherein the wheel force transducer comprises:
an inner flange coupled to an axle shaft flange, the axle shaft flange circumferentially surrounding an end portion of an axle shaft of the machine, and the inner flange positioned axially exterior to the axle shaft and the axle shaft flange;
an outer flange coupled to a wheel flange;
a tube connected to the inner flange at a tube first end and connected to the outer flange at a tube second end,

disposing the tube between the axle shaft flange and the wheel flange such that the inner flange, the tube, and the outer flange are positioned axially exterior to the axle shaft, and the tube extends axially away from the axle shaft towards the wheel flange;
arranging at least one sensor on the tube;
communicatively connecting the sensors to a data acquisition system,
wherein the wheel force transducer is configured to provide data for at least one of forces and moments subjected to the wheel.

15. The method according to claim 14 , further comprising:
measuring strain in the wheel force transducer.

16. The method according to claim 14 , further comprising:
configuring the data acquisition system to calculate forces and moments of the wheel based on signals obtained by the sensors during rotation of the wheel.

17. The method according to claim 16 , further comprising:
configuring the data acquisition system to compensate for the wheel forces and the moments of the wheel based on a preload and an offset angle of the wheel.

18. The method according to claim 14 , further comprising:
arranging a wall flange inside the tube.

19. The method according to claim 18 , wherein the wall flange is located closer to the outer flange with respect to the inner flange.

20. A wheel force measurement system for a machine, comprising:
a wheel force transducer mounted on at least one rotatable wheel of the machine, wherein the wheel force transducer comprises:
an inner flange coupled to an axle shaft flange, the axle shaft flange circumferentially surrounding an end portion of an axle shaft of the machine, and the inner flange positioned axially exterior to the axle shaft and the axle shaft flange;
an outer flange coupled to a wheel flange of the machine, the outer flange having a width equal to or thicker than a width of the inner flange;
a tube connected to the inner flange at a tube first end and connected to the outer flange at a tube second end, the tube disposed between the axle shaft flange and the wheel flange such that the inner flange, the tube, and the outer flange are positioned axially exterior to the axle shaft, and the tube extends axially away from the axle shaft towards the wheel flange;
a wall flange arranged inside the tube, wherein the wall flange is located closer to the outer flange with respect to the inner flange

at least one force sensor mounted on the tube, wherein the at least one force sensor is configured to provide data for at least one of forces and moments subjected to the wheel and the wall flange includes at least one hole to guide a wire from the at least one force sensor;
a data acquisition system communicatively connected to the at least one sensor to process and calculate the data for at least one of forces and moments subjected to the wheel based on a signal obtained by the at least one force sensor during rotation of the wheel, wherein the data acquisition system is configured to compensate for at least one of forces and moments based on an offset angle of the wheel; and
an electronics housing configured to communicatively connect

Assignees

• Caterpillar Inc

Inventors

• Randall Kort
• Krueger Nicholas
• Frohberg Daniel
• Cook David

Classifications

• G01M17/013

  Wheels · CPC title

• B60B27/0068 Primary

  the element being a sensor · CPC title

• G01L5/0061

  Force sensors associated with industrial machines or actuators (for the specific machine or actuator involved see relevant class, e.g. F01, F04, F16, B66, E21) · CPC title

• G01L5/161

  using variations in ohmic resistance · CPC title

• B60B27/06

  adapted to be fixed on axle · CPC title