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Tensioner and engine assembly

A tensioner and engine technology, applied in the direction of machine/engine, engine components, mechanical equipment, etc., can solve the problems of increased cost, easy wear of ratchet teeth, high cost of plunger, and achieve cost saving, easy adjustment, and easy return effect of distance

Inactive Publication Date: 2020-04-21
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the ratchet teeth constructed on the outer wall of the plunger are easy to wear, and the cost of replacing the plunger is also high
In addition, for example, in the ratchet tensioner disclosed in the above-mentioned Chinese patent document CN 101765729 B, the assembly of all components is very complicated, which also increases the cost accordingly

Method used

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  • Tensioner and engine assembly
  • Tensioner and engine assembly
  • Tensioner and engine assembly

Examples

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Embodiment Construction

[0030] figure 1 A longitudinal sectional view of a tensioner according to a preferred embodiment of the present invention is shown. The tensioner is configured as a hydraulic tensioner for applying tension to a chain in an engine timing system.

[0031] Such as figure 1As shown, the tensioner includes a housing 1 and a plunger 4 . The housing 1 forms a chamber 11 . The chamber 11 and the plunger 4 adopt a cylindrical structure design in this embodiment. The chamber 11 has an opening on the longitudinal side, ie the axial side. This opening faces a tension arm (not shown) in the engine timing system after the tensioner is assembled to the engine housing. The plunger 4 is at least partially accommodated in the chamber 11 . The plunger 4 is formed with a radially extending collar 41 on the longitudinal end side facing away from the opening of the chamber 11 . Under the combined effect of the spring 2 and the oil delivered to the chamber 11 via the check valve 3, the plunge...

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Abstract

The invention relates to a tensioner and an engine assembly. The tensioner is used in an engine timing system and includes a housing (1), a plunger (4) and a ratchet mechanism. The housing(1) is formed in a chamber (11) opened in one longitudinal side, the plunger (4) is at least partially contained in the chamber (11) and can move in the longitudinal direction of the chamber (11), the longitudinal end side, away from the chamber opening, of the plunger (4) is provided with a flange portion (41), the ratchet mechanism includes a sleeve (5) and a ratchet pairing part (6), a ratchet (52) is formed on the outer wall of the sleeve (5), the sleeve (5) can be in sleeving connection with the plunger (4) in the mode of sliding relative to the plunger (4), the sleeve (5) can abut against the flangeportion (41) through the longitudinal end away from the chamber opening, and the ratchet pairing part (6) is matched with the ratchet (52) and arranged in the housing (1). The engine assembly comprises the tensioner.

Description

technical field [0001] The present invention relates to tensioners for engine timing systems, and more particularly to ratchet tensioners. The invention also relates to an engine assembly comprising the tensioner described above. Background technique [0002] The tensioner can be used in the engine timing system to tension the chain to prevent the chain from loosening due to various reasons such as temperature, wear and play, thereby reducing or even avoiding problems such as tooth jumping and noise. [0003] Various types of tensioners are known in the art, of which hydraulic tensioners are often used. In this type of solution, the tensioner has a cylinder and a plunger that can move in a hydraulic chamber of the cylinder, wherein the tensioner cylinder is mounted on the engine housing, and the plunger can be moved between springs and via checks. The combination of hydraulic medium, such as oil, delivered by the valve to the hydraulic chamber is pushed out of the tensione...

Claims

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Application Information

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IPC IPC(8): F16H7/06F16H7/08F01L1/348
CPCF01L1/348F16H7/06F16H7/08F16H2007/0853
Inventor 李鹏飞刘会粉王庆伟张阿庆
Owner SCHAEFFLER TECH AG & CO KG
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