Method for producing a pendulum arrangement of a pendulum laser device, and pendulum laser device

Patent metadata

Field	Value
Publication number	US-10704906-B2
Application number	US-201615775890-A
Country	US
Kind code	B2
Filing date	Nov 18, 2016
Priority date	Nov 30, 2015
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A method for producing a pendulum arrangement of a pendulum laser device includes producing a universal joint of a pendulum of the pendulum arrangement by forming two orthogonal, at least partially micro-structured shafts via plastic injection moulding and positioning at least two bearing shells on the at least partially micro-structured regions of at least one shaft of the universal joint. The method further includes producing an optic carrier of the pendulum of the pendulum arrangement as a single piece with the bearing shells by overmoulding at least two bearing shells surrounding a shaft of the universal joint via plastic injection moulding. The optic carrier is connected to the universal joint such that it is configured to rotate about the one shaft.

First claim

The invention claimed is:

1. A production method for a pendulum arrangement of a pendulum laser device, comprising:
producing a universal joint of a pendulum of the pendulum arrangement by forming two orthogonal, at least partially microstructured shafts via plastic injection molding;
placing at least two bearing shells on the at least partially microstructured regions of at least one shaft of the universal joint; and
producing an optics carrier of the pendulum of the pendulum arrangement integrally with the bearing shells by overmolding at least two bearing shells surrounding a shaft of the universal joint via plastic injection molding, and connecting the optics carrier to the universal joint such that it is configured to rotate about the one shaft.

2. The production method as claimed in claim 1 , wherein the bearing shells are produced from a thermoplastic semifinished product.

3. The production method as claimed in claim 2 , wherein the bearing shells are produced from an extruded Teflon or polyoxymethylene or polyketone semifinished product.

4. The production method as claimed in claim 1 , wherein the bearing shells are heated before being overmolded, and wherein the inner diameter of the bearing shells decreases due to thermal expansion.

5. The production method as claimed in claim 1 , wherein the bearing shells are cooled after having been overmolded, wherein a thin gap is produced in relation to the at least partially microstructured shafts due to the thermal contraction/shrinkage.

6. The production method as claimed in claim 1 , further comprising introducing a lubricant into the gap between the bearing shell and the microstructured shaft.

7. The production method as claimed in claim 1 , wherein at least one holder is formed in the optics carrier via plastic injection molding, the at least one holder configured to hold a laser unit.

8. The production method as claimed in claim 7 , wherein the at least one holder is formed by use of a device configured to produce an undercut.

9. The production method as claimed in claim 1 , further comprising producing a pendulum suspension via plastic injection molding.

10. The production method as claimed in claim 9 , further comprising arranging the pendulum such that the pendulum is configured to oscillate on the pendulum suspension.

11. The production method as claimed in claim 9 , wherein the pendulum arrangement is composed of the pendulum and the pendulum suspension, the production method further comprising mounting the pendulum arrangement in a pendulum laser device.

12. The production method as claimed in claim 9 , wherein the pendulum suspension is produced as a two-part intermateable structural element.

13. A self-leveling pendulum laser device, comprising:
at least one housing;
a pendulum suspension;
a pendulum that includes an optics carrier attached thereto, the pendulum arranged such that the pendulum is configured to oscillate in the housing via the pendulum suspension; and
at least one laser unit attached to the optics carrier of the pendulum and configured to generate at least one optical marking,
wherein a universal joint of the pendulum and the optics carrier of the pendulum are configured integrally via plastic injection molding, the optics carrier connected to the universal joint such that the optics carrier is configured to rotate about at least one shaft of the universal joint, and
wherein the rotatable connection is self-lubricating via a surface capillary structure of one or more of the at least one shaft and the optics carrier.

14. The self-leveling pendulum laser device as claimed in claim 13 , wherein the optics carrier is connected to the universal joint such that the optics carrier is configured to oscillate about the at least one shaft of the universal joint.

Assignees

• Bosch Gmbh Robert

Inventors

• Geise Stephan

Classifications

• F16D3/41

  with ball or roller bearings · CPC title

• B29C45/1459

  Coating annular articles · CPC title

• F16D3/40

  with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes · CPC title

• B29C2045/1673

  injecting the first layer, then feeding the insert, then injecting the second layer · CPC title

• F16C2208/90

  Phenolic resin · CPC title