SCARA STRUCTURED COORDINATE MEASURING MACHINE WITH BELT DRIVE GUIDED PROBE HEAD

• US 20170038189A1
• Filed: 08/03/2016
• Published: 02/09/2017
• Est. Priority Date: 08/03/2015
• Status: Active Grant

• Current Assignee: Hexagon Technology Center GmbH (Hexagon AB)
• Original Assignee: Hexagon Technology Center GmbH (Hexagon AB)
• Inventors: JORDIL, Pascal
• Granted Patent: US 10,175,035 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B25J 15/0019 End effectors other than grippers
• CPC Class Codes: B25J 9/1035 Pinion and fixed rack drivers, e.g. for rotating an upper arm support on the robot base
• CPC Class Codes: B25J 9/104 with cables, chains or ribbons
• CPC Class Codes: B25J 9/126 Rotary actuators
• CPC Class Codes: B25J 9/1615 characterised by special kind of manipulator, e.g. planar, scara, gantry, cantilever, space, closed chain, passive/active joints and tendon driven manipulators
• CPC Class Codes: G01B 21/04 by measuring coordinates of points
• CPC Class Codes: G01B 5/008 using coordinate measuring machines
• CPC Class Codes: Y10S 901/21 Flaccid drive element

Abstract

The invention relates to a coordinate-measuring machine for determining at least one spatial coordinate of a measurement point on a measuring object, comprising a base, a carrier comprising at least one carrier segment, a proximal end of the carrier being mounted pivotably about a base axis in the base, a measuring probe being arranged on a distal end of the carrier, and an angle measuring system for determining pivot angles of the at least one carrier segment, and/or rotation angles of the measuring probe, wherein at least one belt drive comprising a base pulley being arranged in the base, at least one follower pulley being arranged on at least one carrier segment, and at least one belt binding the rotatory behaviour of said pulleys.

Claims

1. A coordinate-measuring machine for determining at least one spatial coordinate of a measurement point on a measuring object, coordinate-measuring machine comprising:

a base;

a carrier comprising at least one carrier segment, a proximal end of the carrier being mounted pivotably about a base axis in the base;

a measuring probe being arranged on a distal end of the carrier; and

an angle measuring system for determining;

pivot angles of the at least one carrier segment, and/or

rotation angles of the measuring probe;

at least one belt drive comprising;

a base pulley being arranged in the base,

at least one follower pulley being arranged on at least one carrier segment, and

at least one belt binding the rotatory behaviour of said pulleys.

2. The coordinate-measuring machine according to claim 1, wherein:

the measuring probe being fixedly connected with a follower pulley arranged on the distal end of the carrier, wherein the measuring probe.

3. The coordinate-measuring machine according to claim 1, wherein:

said follower pulley is rotatably mounted in the distal end of the carrier.

4. The coordinate-measuring machine according to claim 1, wherein:

at least one motor (m) arranged in the base and driving a base pulley for a controlled positioning of the measuring probe or a carrier segment, and

a control unit for controlling the motor.

5. The coordinate-measuring machine according to claim 1, wherein:

the base pulley being a fixed base pulley which is fixed and prevented from rotating, and

the at least one follower pulley being a rotatable follower pulley which is rotatable relative to the carrier segment it is arranged on.

6. The coordinate-measuring machine according to claim 3, wherein:

the base pulley being a driven base pulley which is driven by a motor (m).

7. The coordinate-measuring machine according to claim 3, wherein:

the at least one follower pulley being a rotatable follower pulley which is rotatable relative to the carrier segment it is arranged on.

8. The coordinate-measuring machine according to claim 3, wherein:

the base pulley being a driven base pulley which is driven by a motor (m).

9. The coordinate-measuring machine according to claim 3, wherein:

at least one follower pulley being a fixed follower pulley which is fixedly attached to the carrier segment it is arranged on.

10. The coordinate-measuring machine according to claim 1, wherein:

a belt being wrapped around a base pulley and at least one follower pulley and thereby binding the rotatory behaviour of said follower pulleys.

11. The coordinate-measuring machine according to claim 1, wherein:

a belt being wrapped around at least two follower pulleys and thereby binding the rotatory behaviour of said follower pulleys.

12. The coordinate-measuring machine according to claim 1, wherein:

the carrier is vertically adjustable by a lift positioned in the base.

13. Coordinate measuring machine according to claim 1, wherein:

more than one carrier segments are horizontally pivotable relative to each other about vertical segment axes.

14. Coordinate measuring machine according to claim 10, wherein:

each of the at least one follower pulley is mounted on a carrier segment such that the axis of the follower pulley coincides with a segment axis.

15. Coordinate measuring machine according to claim 1, wherein:

a follower pulley having an axis angled by 90 degrees relative to the axis of a pulley it is bound to via a belt.

16. The coordinate-measuring machine according to claim 1, wherein:

the measuring probe is vertically adjustable by a belt drive, wherein the axis of a distal follower pulley is angled relative to the base pulley, and wherein the distal follower pulley has a pinion driving a gear rack, to which the measuring probe is attached.

17. The coordinate-measuring machine according to claim 1, wherein:

the measuring probe is vertically adjustable by a belt drive, wherein the axis of a distal follower pulley is angled 90 degrees relative to the base pulley, and wherein the distal follower pulley has a pinion driving a gear rack, to which the measuring probe is attached.

18. The coordinate-measuring machine according to claim 1, wherein:

the measuring probe is vertically adjustable by a belt drive comprising at least two follower pulleys, that are entangled by a distal belt and the axes of which are angled relative to the base pulley, wherein the measuring probe is linked to the distal belt, which therewith provides and up and down movement.

19. The coordinate measuring machine according to claim 1, wherein:

the measuring probe is vertically adjustable by a belt drive comprising at least two follower pulleys, that are entangled by a distal belt and the axes of which are angled by 90 degrees relative to the base pulley, wherein the measuring probe is linked to the distal belt, which therewith provides and up and down movement.

20. The coordinate measuring machine according to claim 1, wherein:

the measuring probe being mounted on a holder such that it is pivotable about a horizontal axis by a belt drive comprising at least two follower pulleys, the axes of which are angled

relative to each other, and

relative to the base pulley.