MOUNTING APPARATUS FOR ARTICULATED ARM LASER SCANNER

• US 20120210590A1
• Filed: 01/25/2012
• Published: 08/23/2012
• Est. Priority Date: 08/31/2010
• Status: Active Grant

• Current Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Original Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Inventors: Ferrari, Paul
• Granted Patent: US 8,429,828 B2
• Time in Patent Office: Days
• US Class Current: 33/503
• CPC Class Codes: G01B 11/007 feeler heads therefor
• CPC Class Codes: G01B 5/012 Contact-making feeler heads therefor
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

An articulated arm can include a plurality of articulated arm members, a probe, a receiving portion at a distal end comprising a threaded portion, and a base at a proximal end. A base plate can kinematically mount on the receiving portion and have a hole positioned such that the probe passes through the hole. The base plate can also couple to a laser and an optical sensor located on opposite sides of the hole. A nut can threadably mount to the threaded portion of the receiving portion. Further, a wave spring can mount on the receiving portion between the nut and the base plate. Thus, movement of the nut along the receiving portion can cause the wave spring to urge the base plate against the articulated arm to secure the kinematic mount. The wave spring can then mechanically isolate the base plate from the articulated arm.

Claims

1. (canceled)

2. An articulated arm CMM comprising:

an articulated arm comprising a plurality of articulated arm members, a receiving portion at a distal end comprising a threaded portion, and a base at a proximal end;

a laser scanner mounted on the receiving portion, the laser scanner comprising a laser and an optical sensor, wherein the laser scanner mounts on the receiving portion by a kinematic mount; and

a spring mounted on the receiving portion to urge the laser scanner against the articulated arm to secure the kinematic mount, the wave spring mechanically isolating the laser scanner from the articulated arm.

3. The CMM of claim 2, wherein the spring is a wave spring.

4. The CMM of claim 2, wherein the kinematic mount comprises three pins and three grooves configured to receive the three pins.

5. The CMM of claim 4, wherein the pins and grooves are oriented radially.

6. The CMM of claim 5, wherein the pins and grooves are equally angularly spaced.

7. The CMM of claim 2, wherein the kinematic mount comprises three pins and each pin interfaces with two spheres on the receiving portion.

8. The CMM of claim 2, further comprising a probe mounted to the articulated arm with a kinematic mount.

9. The CMM of claim 8, wherein the probe is mechanically isolated from the articulated arm by a wave spring.

10. The CMM of claim 8, wherein the laser scanner is rotatable relative to the probe.

11. The CMM of claim 2, wherein the receiving portion comprises bearings and at least a portion of the laser or the optical sensor overlaps the bearings.

12. The CMM of claim 2, wherein the optical sensor comprises multiple cameras.

13. An articulated arm CMM comprising:

an articulated arm comprising a plurality of articulated arm members, a plurality of joints connecting said articulated arm members, a threaded portion, and a base at a proximal end;

a laser scanner comprising a laser and an optical sensor, wherein the laser scanner mounts to the articulated arm by a kinematic mount,

wherein the laser scanner is mechanically isolated from the articulated arm such that a deflection on the articulated arm imposes a minimal deflecting force to the laser scanner.

14. The CMM of claim 13, wherein the kinematic mount comprises three pins and three grooves configured to receive the three pins.

15. The CMM of claim 14, wherein the pins and grooves are oriented radially.

16. The CMM of claim 15, wherein the pins and grooves are equally angularly spaced.

17. The CMM of claim 13, further comprising a probe mounted to the articulated arm with a kinematic mount.

18. The CMM of claim 13, wherein the kinematic mount comprises three pins and each pin interfaces with two spheres on the receiving portion.

19. The CMM of claim 17, wherein the probe is mechanically isolated from the articulated arm by a wave spring.

20. The CMM of claim 17, wherein the laser scanner is rotatable relative to the probe.

21. The CMM of claim 13, wherein the receiving portion comprises bearings and at least a portion of the laser or the optical sensor overlaps the bearings.

22. The CMM of claim 13, wherein the laser scanner is mechanically isolated by a wave spring.

23. The CMM of claim 13, wherein the optical sensor comprises multiple cameras.