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Camshaft gear with phase adjustment function, valve timing structure and assembling method

A camshaft gear and phase adjustment technology, applied to components with teeth, belts/chains/gears, valve devices, etc., can solve the problems of production and assembly complexity, irreparable phase deviation, large number of parts, etc., to achieve Reduced assembly accuracy requirements, simplified production and assembly processes, and flexible adjustment effects

Inactive Publication Date: 2017-02-01
CHINA NORTH ENGINE INST TIANJIN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the phase design of the diesel engine valve train, the initial phase relationship between the camshaft and the crankshaft is usually directly matched through the dotted alignment of the transmission gear. Complexity
And low precision, poor flexibility
The phase deviation caused by the cumulative assembly error cannot be compensated

Method used

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  • Camshaft gear with phase adjustment function, valve timing structure and assembling method
  • Camshaft gear with phase adjustment function, valve timing structure and assembling method
  • Camshaft gear with phase adjustment function, valve timing structure and assembling method

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Embodiment Construction

[0020] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0022] A camshaft gear with phase adjustment function, such as figure 1 As shown, including the gear body, the center hole of the gear body is processed with internal spline teeth, and the gear body is provided with 21 external meshing teeth and 22 internal spline teeth, and the centerline of the addendum of one of the external meshing teeth coincides with the center line of the adjacent internal spline teeth, figure 1 The engraved line at the mark a is used to mark the overlapping position, and the adjustment accuracy is 360 / (21X22)=0.779°. The angle between the centerline of the addendum and the centerline of the alveolar of each external tooth is about 8.57°. Each The included angle...

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Abstract

The invention provides a camshaft gear with a phase adjustment function. The camshaft gear with the phase adjustment function comprises a gear body. Internal spline teeth are machined in the position of a center hole of the gear body. The number of external engaging teeth of the gear body is different from the number of the internal spline teeth of the gear body. Compared with the prior art, the camshaft gear with the phase adjustment function has the following advantages that (1) the internal spline teeth are machined on the camshaft gear and connected with an external spline of a camshaft or an external spline of a spline shaft in a matched mode, and the number of the external teeth of the camshaft gear and the number of the internal spline teeth of the camshaft are designed, so that various circumferential staggered angles between the camshaft and the camshaft gear are achieved, and accordingly flexible adjustment of the valve timing phase angle is achieved; and (2) the structural design is simple, adjustment is flexible, initial phases of the camshaft and the camshaft gear are not designed any more, the requirement for assembling precision is greatly lowered, the production and assembly technique is simplified to a great extent accordingly, and flexible adjustment of the phase angle is achieved.

Description

technical field [0001] The invention belongs to the technical field of engine gas distribution structure, and in particular relates to a camshaft gear with a phase adjustment function, a gas distribution structure and an assembly method. Background technique [0002] In the phase design of the diesel engine valve train, the initial phase relationship between the camshaft and the crankshaft is usually directly matched through the dotted alignment of the transmission gear. Complexity. Moreover, the precision is low and the flexibility is poor. The phase deviation caused by the cumulative assembly error cannot be compensated. Contents of the invention [0003] In view of this, the present invention aims at proposing a camshaft gear with a phase adjustment function, which is used for simple assembly and flexible valve phase adjustment in conjunction with the camshaft. [0004] In order to achieve the above object, technical solution of the present invention is achieved in t...

Claims

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Application Information

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IPC IPC(8): F16H55/17F01L1/047
CPCF16H55/17F01L1/047F01L2001/0471
Inventor 朱美琳高丽英姚亮宇王延荣
Owner CHINA NORTH ENGINE INST TIANJIN
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