Camshaft regulator having a central bolt

Patent metadata

Field	Value
Publication number	US-2016201525-A1
Application number	US-201314655432-A
Country	US
Kind code	A1
Filing date	Dec 19, 2013
Priority date	Dec 25, 2012
Publication date	Jul 14, 2016
Grant date	—

Abstract

A camshaft phaser having a central bolt is provided. The camshaft phaser includes: a stator and a rotor which is connected with a camshaft in a torsion-resistant manner and accommodated in the stator; a front cover and a rear cover respectively set at a front side and a back side of the stator; and a compression spring having a first end buckled with the front cover, and a second end fixed to the rotor, wherein the central bolt is installed inside the camshaft phaser through an opening set on the front cover, and the central bolt is configured with a guide part which is adapted for pushing the compression spring to an accurate position. Therefore, a supporting apparatus for supporting the spring is no longer required to be configured in the camshaft phaser, structure of the camshaft phaser is optimized, and manufacturing cost of the camshaft phaser is reduced.

First claim

1 . A camshaft phaser with a central bolt, comprising: a stator, a rotor connected with a camshaft in a torsionally-fixed manner, wherein the rotor is accommodated in the stator, a plurality of working cavities formed between the rotor and the stator; a front cover and a rear cover respectively set at a front side and a back side of the stator, which are combined with the stator through a plurality of bolts; and a compression spring having a first end connected with an outer portion of the front cover, and a second end fixed to the rotor, wherein the central bolt is installed inside the camshaft phaser through an opening set on the front cover, and the central bolt is configured with a guide part which is adapted for pushing the compression spring to an accurate position.

2 . The camshaft phaser with a central bolt according to claim 1 , wherein the central bolt comprises a head part and a slender body part, wherein the guide part connects the head part and the body part, and when the central bolt is entirely installed inside the camshaft phaser, the head part provides a support to the compression spring.

3 . The camshaft phaser having a central bolt according to claim 2 , wherein the guide part has a slope on a surface thereof, and dimension of the guide part close to the head part is larger than that close to the body part.

4 . The camshaft phaser having a central bolt according to claim 1 , wherein the camshaft connected with the rotor is configured with a shaft hole, the shaft hole corresponds to the opening on the front cover for installing the central bolt.

5 . The camshaft phaser having a central bolt according to claim 2 , wherein the camshaft connected with the rotor is configured with a shaft hole, the shaft hole corresponds to the opening configured on the front cover for installing the central bolt.

6 . The camshaft phaser having a central bolt according to claim 3 , wherein the camshaft connected with the rotor is configured with a shaft hole, the shaft hole corresponds to the opening on the front cover for installing the central bolt.

Assignees

• He Yanhua
• Ou Chen
• Schaeffler Technologies Ag

Inventors

• He Yanhua
• Ou Cheng

Classifications

• F01L2001/34483

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• F01L2001/34456

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• F01L2001/3445

  Details relating to the hydraulic means for changing the angular relationship · CPC title

• F01L1/3442

  using hydraulic chambers with variable volume to transmit the rotating force · CPC title

• F01L1/344 Primary

  changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear · CPC title