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Hydraulic automatic tensioning device for motor head accessory

A front-end accessory and tensioner technology, applied in the field of hydraulic automatic tensioners, can solve the problems affecting the service life of the tensioner and the large radial size of the automatic tensioner, and achieve good longitudinal guiding rigidity and radial size. Small, long-life effect

Active Publication Date: 2017-11-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of inner and outer chambers, the radial dimension of the automatic tensioner of this structure is large, and when the oil flows out from the gap between the plunger and the cylinder, the eccentricity of the plunger may be caused by uneven pressure, which will affect the tensioner. service life

Method used

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  • Hydraulic automatic tensioning device for motor head accessory
  • Hydraulic automatic tensioning device for motor head accessory
  • Hydraulic automatic tensioning device for motor head accessory

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Embodiment Construction

[0029] The purpose of the invention of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.

[0030] Such as figure 1 As shown, a hydraulic automatic tensioner attached to the front end of the engine, the automatic tensioner 1 includes a cylinder 2, a piston 3, an upper connector 4, a lower connector 5, a spring coil spring 6, hydraulic oil 7, and a sealing unit 13 and air storage chamber 14. The cylinder body 2 is cylindrical, with openings at both ends of the cylinder body 2, one end of the opening is sealed by the sealing unit 13, and the other end of the opening is sealed by the close fit of the air storage chamber 14 and the transition piece 28, and the transition piece 28 It is connected with the lower connecting piece 5 through scr...

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Abstract

The invention discloses a hydraulic automatic tensioning device for a motor head accessory. The automatic tensioning device includes a cylinder body, a piston is arranged inside the cylinder body and separates the cylinder body into an upper hydraulic cavity and a lower hydraulic cavity, wherein the piston is provided with an one-way valve and a damping hole; hydraulic oil passes through the one-way valve and the damping hole and flows back and forth inside the two hydraulic cavities to generate asymmetrical damping; a piston rod is arranged on the piston and stretches out of a sealing unit; the automatic tensioning device is further provided with an air storage chamber formed in the other hydraulic cavity, and the air storage chamber can make up volumetric difference caused between the upper and lower hydraulic cavities by piston motion, so that the hydraulic oil can freely pass through the one-way valve and the damping hole and flow back and forth inside the upper and lower hydraulic cavities to generate the asymmetrical damping. The hydraulic automatic tensioning device for the motor head accessory can avoid belt slip and generation of noise and vibration to make a system function normally and effectively; the radial dimension of the tensioning device is small, so that the device is easy to arrange; the lengthways guiding rigidity of the tensioning device is great, so that eccentric wear is unlikely to happen to the piston and the cylinder body, and the service life is prolonged.

Description

technical field [0001] The invention relates to an automatic tensioner, in particular to a hydraulic automatic tensioner, which is designed for the driving system of the front end accessory of the automobile engine. Background technique [0002] For the automatic tensioner of the front-end accessory system of the automobile engine, the main purpose is to make the tension of the belt in the transmission system appropriate, to compensate the change of the belt due to tension or wear, and to attenuate the swing of the tension arm caused by the fluctuation of the engine speed, so as to avoid Belt slippage, noise and vibration keep the system working properly and efficiently. [0003] There are two types of existing automatic tensioners: friction damping and hydraulic damping. Frictional damping type automatic tensioner generates frictional damping through the relative sliding of the friction piece relative to the surface in contact with the friction piece. According to the aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H7/08
CPCF16H7/0836F16H7/0838F16H2007/0806F16H2007/0812
Inventor 苏比哈什·如凯迦徐谱上官文斌
Owner SOUTH CHINA UNIV OF TECH
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