Module with pre-oriented camshaft

Patent metadata

Field	Value
Publication number	US-10260455-B2
Application number	US-201515301919-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Apr 8, 2014
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A module may include a receiving element in the form of a bearing frame or a covering hood for arrangement on a cylinder head of an internal combustion engine. The module may further include a camshaft that is rotatably mounted on the receiving element and projects from the receiving element to hold a camshaft wheel. The module can be prefabricated for direct mounting on the cylinder head. In the prefabrication process, the camshaft may be locked against rotation by an externally accessible securing part in an angular position for acting on valves. The securing part may extend through a first aperture in the camshaft wheel and through or into a receptacle of the receiving element. After mounting the module on the cylinder head, the securing part can be removed.

First claim

What is claimed is:

1. A module comprising:
a receiving element configured as a bearing frame or a covering hood and is sized and shaped to mount to a cylinder head of an internal combustion engine, the receiving element comprising a receptacle;
a camshaft rotatably mounted on the receiving element, wherein the camshaft projects out of a face of the receiving element;
a camshaft wheel fixedly mounted on the camshaft, the camshaft wheel including a first aperture formed therethrough and a second aperture formed therethrough; and
a securing part that is accessible when the receiving element is mounted to the cylinder head, the securing part comprising a pin configured to lock the camshaft against rotation in an angular position when the pin extends through the first aperture and through or into the receptacle of the receiving element, wherein the securing part further includes a catch that is configured to extend through the second aperture, engage the camshaft wheel, and axially secure the pin in position when the catch is so engaged.

2. The module of claim 1 wherein the camshaft wheel is a toothed wheel or a belt wheel wherein the first aperture is configured as a bore sized and shaped to receive the pin, wherein a sliding fit is provided between the pin and the bore, wherein the pin extends through the bore into the receptacle in the receiving element, wherein the receptacle in the receiving element is configured as a securing bore.

3. The module of claim 1 wherein the securing part is manufactured as a one-piece plastic injection-molded part.

4. The module of claim 3 wherein the pin has an axially slotted wall configured to limit radial flexibility.

5. The module of claim 1 wherein the catch comprises a flexible clip leg with a latching lug, wherein the flexible clip leg engages in the second aperture in the camshaft wheel, wherein the latching lug engages behind an edge of the second aperture.

6. The module of claim 5 wherein the flexible clip leg is a first flexible clip leg, the catch further comprising a second flexible clip leg with a latching lug, with the first and second flexible clip legs being connected via a tilt joint and closeable by a spring force, wherein the latching lugs are disposed at one end of the first and second flexible clip legs and form a clip head, wherein externally accessible handles are disposed at an opposite end of the first and second flexible clip legs, wherein pushing the externally accessible handles together causes the clip head to open.

7. The module of claim 1 wherein the receiving element comprises bores for receiving the camshaft, wherein a body of the camshaft is inserted into the bores of the receiving element via rotary bearings in a joining process that uses thermal expansion.

8. The module of claim 1 wherein the camshaft is a first camshaft and the securing part is a first securing part, the module further comprising a second camshaft and a second securing part, wherein the first and second camshafts are rotatably mounted in the receiving element, wherein cams of the first and second camshafts are positioned to act on two rows of valves, wherein the first and second camshafts are locked against rotation in angular positions by the first and second securing parts, at least before the securing parts are removed.

9. A module comprising:
a receiving element configured as a bearing frame or a covering hood and configured to be mounted on an internal combustion engine, the receiving element comprising a receptacle;
a camshaft rotatably mounted on the receiving element, wherein the camshaft projects from the receiving element;
a camshaft wheel coupled to the camshaft, the camshaft wheel including a first aperture formed therethrough and a second aperture formed therethrough; and
a securing part that remains accessible when the receiving element is mounted on the internal combustion engine, wherein the securing part is removable, wherein the securing part comprises a pin configured to maintain the camshaft in an angular position and prevent the camshaft from rotating, wherein prior to removal the pin extends through the first aperture of the camshaft wheel and through or into the receptacle of the receiving element, wherein the securing part further includes a catch that is configured to extend through the second aperture, engage the camshaft wheel, and axially secure the pin in position when the catch is so engaged.

10. The module of claim 9 wherein the camshaft wheel is configured as a toothed wheel or a belt wheel.

11. The module of claim 9 wherein the catch comprises two flexible clip legs, the two flexible clip legs each including a latching lug.

12. The module of claim 11 wherein the securing part further comprises two handles configured such that squeezing the two handles towards one another causes the latching lugs of the two flexible clip legs to separate and disengage from the camshaft wheel.

13. A securing part for releasably maintaining a camshaft rotatably mounted on a receiving element in an angular position, the securing part comprising:
a bridge part;
a pin extending from the bridge part;
two flexible clip legs extending from the bridge part on opposite sides of and along the pin, the two clip legs each including a latching lug; and
two handles extending from the bridge part in a direction opposite the pin, wherein squeezing the two handles towards one another causes the latching lugs of the two flexible clip legs to separate.

Assignees

• Thyssenkrupp Presta Tecct Ag

Inventors

• Schmid Heiko
• Schatton Ulrich
• Schmidt Hans Jürgen

Classifications

• F01L2303/02

  Initial camshaft settings · CPC title

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2303/01

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

• F01L2001/0537

  Double overhead camshafts [DOHC] · CPC title

• F01L2001/028

  Pre-assembled timing arrangement, e.g. located in a cassette · CPC title