Device for positioning multiple function elements

Patent metadata

Field	Value
Publication number	US-9492896-B2
Application number	US-201414157240-A
Country	US
Kind code	B2
Filing date	Jan 16, 2014
Priority date	Jan 17, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A device for positioning multiple function elements having a recess for receiving a shaft in a predetermined angle position may include multiple mountings for receiving the function elements. The mountings may be equipped with a molding establishing the predetermined angle position of the respective function element corresponding to the angle position on the shaft. The mountings may be positioned such that the recesses of the function elements lie on a common straight line. The mountings may be arranged vertically on top of one another so that the common straight line runs in vertical direction. A vertically moveable guide carriage for the shaft may be provided for joining the shaft with the function elements in vertical direction.

First claim

The invention claimed is:

1. A device for positioning a plurality of receiving elements, each having a recess for receiving a shaft, in a predetermined angle position on the shaft, comprising:
a plurality of mountings for receiving a plurality of receiving elements, each mounting including a moulding defining an angle position of the respective receiving element corresponding to the predetermined angle position on the shaft, wherein the plurality of mountings are arranged such that the recesses of the plurality of receiving elements lie on a common straight line,
wherein the plurality of mountings are arranged vertically on top of one another, so that the common straight line extends in a vertical direction,
a vertically moveable guide carriage for the shaft, wherein the guide carriage is configured for joining the shaft with the plurality of receiving elements in the vertical direction,
wherein at least one mounting of the plurality of mountings includes an inductively non-heatable material at least in a region of the moulding, and
wherein at least one of:
(i) at least one mounting includes at least three pin elements, and wherein the at least three pin elements are arranged on the at least one mounting to receive at least one receiving element in an angular-accurate position, and
(ii) the moulding of at least one mounting includes a contour configured to surround at least one receiving element, and wherein the contour of the at least one moulding is profiled to include a protrusion in at least three locations each extending radially inwards towards the common straight line to define a contact point in the at least three locations with the at least one receiving element and orient the at least one receiving element in an angular-accurate position.

2. The device according to claim 1 , wherein each of the plurality of mountings are composed of an inductively non-heatable material.

3. The device according to claim 1 , wherein the shaft is connected to the plurality of receiving elements via a thermally joined fit in which at least one of the shaft is cooled and the plurality of receiving elements are heated.

4. The device according to claim 1 , wherein the moulding of at least one other mounting has at least a partial negative contour of at least one receiving element so that the at least one receiving element is received in an angular-accurate position.

5. The device according to claim 4 , wherein the negative contour of the moulding is matched to an outer contour of the at least one receiving element to be received therein such that the at least one receiving element is arranged in the moulding at room temperature with a predefine radial play with respect to the common straight line to account for a heat expansion of the at least one receiving element.

6. The device according to claim 5 , wherein the negative contour of the moulding is smaller by at least 10% of the heat expansion of the at least one receiving element so that the at least one receiving element upon heating is braced and fixed in the negative contour.

7. The device according to claim 1 , further comprising a heating device configured to heat at least two receiving elements in at least two mountings.

8. The device according to claim 7 , wherein the heating device comprises at least two induction coils controllable independently of one another.

9. The device according to claim 1 , wherein at least one mounting is coolable to adjust a temperature at least in a region of the moulding even when a heated receiving element is positioned in the mounting.

10. The device according to claim 1 , wherein at least four mountings are arranged vertically on top of one another so that the common straight line runs in the vertical direction.

11. The device according to claim 10 , wherein:
at least two mountings are arranged on a platform,
at least two such platforms are arranged on the device through at least two positioning elements, and
the common straight line extends vertically.

12. The device according to claim 1 , further comprising a holding device for a bearing frame having a bearing gallery for mounting the shaft, wherein the bearing frame is positioned relative to the device via at least two positioning elements such that the bearing gallery of the bearing frame is aligned with the recesses of the plurality of receiving elements.

13. The device according to claim 12 , wherein the positioning elements are fitted pins.

14. The device according to claim 1 , wherein the plurality of receiving elements include at least one of cams, balancing masses, gear wheels and bearings.

15. The device according to claim 1 , wherein the moulding of the at least one mounting has the contour configured to surround the at least one receiving element, the contour of the moulding profiled to have the protrusion in the at least three locations each extending radially inwards towards the common straight line to define the contact point in the at least three locations with the at least one receiving element and orient the at least one receiving element in the angular-accurate position.

16. The device according to claim 1 , wherein the at least one mounting has the at least three pin elements arranged to receive the at least one receiving element in the angular-accurate position.

17. A method for thermally joining a shaft with a plurality of receiving elements each having a recess for the shaft via a positioning device comprising:
placing the plurality of receiving elements in a respective moulding of a plurality of mountings such that the recesses of the plurality of receiving elements lie on a common substantially vertical straight line, wherein the moulding of the plurality of mountings orients the plurality of receiving elements in an angular-accurate position,
heating the plurality of receiving elements,
pushing the shaft with a vertically moveable guide carriage through the recesses of the plurality of receiving elements,
fixing the plurality of receiving elements on the shaft via a temperature equalisation fixing, and
removing the shaft including the plurality of receiving elements fixed thereon from the device,
wherein at least one mounting of the plurality of mountings includes an inductively non-heatable material at least in a region of the moulding to limit a thermal expansion of the at least one mounting during the heating of the plurality of receiving elements, and
wherein at least one of:
(i) at least one mounting includes at least three pin elements, and wherein the at least three pin elements are arranged on the at least one mounting to receive at least one receiving element in an angular-accurate position, and
(ii) the moulding of at least one mounting includes a contour configured to surround at least one receiving element, and wherein the contour of the at least one moulding is profiled to include a protrusion in at least three locations each extending radially inwards towards the common straight line to define a contact point in the at least three locations with the at least one receiving element and orient the at least one receiving element in an angular-accurate position.

18. The method according to claim 17 , wherein heating the plurality of receiving elements includes heating at least two receiving elements with at least two independently controllable induction coils.

19. A positioning assembly, comprising:
a shaft;
a plurality of receiving elements each having a recess for receiving the shaft in a predetermined angle position on the shaft; and
a positioning devic

Assignees

• Mahle Int Gmbh

Inventors

• Beerens Christoph
• Menonna Antonio
• Pfizenmaier Lothar
• Schacherer Roland

Classifications

• F01L2303/01

  Tools for producing, mounting or adjusting, e.g. some part of the distribution · CPC title

• F16B4/006

  Shrinkage connections, e.g. assembled with the parts being at different temperature · CPC title

• F01L1/047

  Camshafts · CPC title

• Y10T29/49865

  by temperature differential [e.g., shrink fit] · CPC title

• Y10T29/49293

  Camshaft making · CPC title