Hydraulic tensioner

A tensioning device, hydraulic technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problem that the tensioning device and the tensioning wheel cannot guarantee the positioning state, the noise of the tensioning device, etc., to avoid unfavorable , to avoid the effect of empty stroke

Inactive Publication Date: 2005-08-17
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the working state, the disadvantage caused by the influence of the air in the pressure chamber of the tensioning device is that the compressed air makes the tensioning device and the tens

Method used

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Examples

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Embodiment Construction

[0026] FIG. 1 shows a hydromechanically acting tensioning device 1 comprising a rotationally symmetrical pot-shaped housing 2 which is fixed but pivotable by means of fastening lugs 3 to, for example, an internal combustion engine not shown in FIG. 1 . Radially spaced from the outer wall 4, a cylinder 5 in which a longitudinally displaceable guiding piston 6 is housed concentrically within the housing. The piston 6 of the pressure chamber 7 in the end-side delimiting cylinder 5 has, on the end remote from the pressure chamber 7, a fastening lug 8 which interacts indirectly or directly with a tensioning pulley which pretensions the traction drive Traction devices, especially belts. The reasonable power supply of the tensioning wheel is completed by means of the helical compression spring 9. The helical compression spring 9 is supported on the bottom 10 of the housing 2 by the first spring end, and is supported by the second spring end on the fixed lifting lug 8 or on the opposi...

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Abstract

A tensioner for a traction drive includes a cylinder arranged in a housing at a distance to a housing wall to thereby define an interior space which contains hydraulic fluid. A piston is received in the cylinder for back-and-forth movement and bounds a pressure chamber containing hydraulic fluid. The piston has a cylinder-distal end which is operatively connected to a spring-biased tension roller supported on a traction member. Formed between the piston and the cylinder is a leakage gap, and a reservoir for hydraulic fluid is provided in an area of the leakage gap to prevent ingress of air into the pressure chamber, when the traction drive is at a rest.

Description

technical field [0001] The invention relates to a hydro-mechanically acting tensioning device for a traction drive. The tensioning device comprises a pot-shaped housing fixed at one end but oscillatingly connected to the housing, and a cylinder concentrically arranged in the housing and radially eccentrically arranged with the outer wall of the housing. A longitudinally displaceable piston is guided in the cylinder, which delimits on one side the cylinder pressure chamber which is filled with hydraulic fluid. At the end remote from the cylinder, the piston can be indirectly connected to a tensioning pulley, which is supported via compression springs on the traction means, in particular on the belt of the traction drive. The pressure chamber of the cylinder is separated by a non-return valve from an annular interior space, which is delimited radially by the outer wall of the cylinder and the inner wall of the housing. In this respect, the annularly formed interior is partiall...

Claims

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Application Information

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IPC IPC(8): F16H7/12F16H7/08
CPCF16H2007/0878F16H2007/0859F16H2007/0812F16H2007/0806F16H7/0848F16H7/12
Inventor 阿博加斯特·格鲁瑙托马斯·贝特尔斯霍费尔爱德华·克雷茨克里斯蒂安·沙费尔哈罗德·沙费尔迪特马尔·雅格马可·奥尔西
Owner SCHAEFFLER TECH AG & CO KG
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