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Hydraulic tensioning element

A hydraulic and component technology, applied in the field of hydraulic tensioning components, can solve problems such as valve seat damage, check valves cannot properly seal the pressure chamber, etc., and achieve the effect of weakening dynamic oscillation

Inactive Publication Date: 2011-07-27
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reverse coupling leads to an uncontrolled impact of the ball of the check valve against the valve seat of the check valve, wherein not only the ball but also the valve seat are damaged
A check valve thus damaged may not be able to seal the pressure chamber properly

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0015] figure 1 A hydraulic tensioning element 100 is shown which has a pot-shaped housing 2 in which a hollow-cylindrical piston 1 is guided longitudinally. Housing 2 and piston 1 enclose a pressure chamber 6 . Inside the pressure chamber 6 , the compression spring 12 is supported not only on the bottom of the housing, but also on the bottom of the piston 1 . A check valve 5 is arranged in the housing bottom. The non-return valve 5 is designed as a ball valve, in which ball 14 rests on the valve seat 13 . When the motor is started, oil flows into the pressure chamber 6 through the inlet opening 15 arranged in the housing bottom via the non-return valve 5 . By means of a compression spring 12 the piston 1 is spring-loaded against the traction mechanism 4 to be tensioned. When the traction mechanism presses against the piston 1 , the piston 1 is pushed into the housing 2 again. The retraction movement of the piston 1 is damped on the one hand by the compression spring 12 ...

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PUM

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Abstract

The invention relates to a hydraulic tensioning element (100) applied in a drawing mechanism (4). The hydraulic tensioning element comprises a piston (1) abutting against the drawing mechanism (4) for loading a spring. The piston (1) is further used for linearly guiding and defining a pressure chamber (6) in a cylindrical housing (2). A check valve (5) opening towards the pressure chamber (6) and an overpressure valve (7) opening away from the pressure chamber (6) are distributed in the housing, wherein, a hydraulic throttling element (9) is equipped between the check valve (5) and the overpressure valve (7).

Description

technical field [0001] The invention relates to a hydraulic tensioning element for a traction mechanism, which has a piston which is spring-loaded against the traction mechanism and which is guided linearly in a housing configured as a cylinder and A pressure chamber is delimited, in which a non-return valve opening towards the pressure chamber and a pressure relief valve opening away from the pressure chamber are distributed. Background technique [0002] A hydraulic tensioning element according to the above classification is known from publication DE 10 2004 048 281 A1. DE 10 2004 048 281 A1 shows a hydraulic tensioning element with a piston which is guided in a blind bore of a housing and closes off a pressure chamber. A compression spring is located in the pressure chamber, via which compression spring the piston is elastically loaded onto the traction means to be tensioned. Via a non-return valve arranged in the housing, oil is additionally passed into the pressure ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H7/08
CPCF16H2007/0859F16H2007/0814F16H7/0836F16H2007/0806F02B67/06F16H7/18
Inventor 约翰内斯·朗
Owner SCHAEFFLER TECH AG & CO KG