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chain tensioner

A tensioner and chain technology, applied in the direction of belts/chains/gears, threaded fasteners, transmissions, etc., can solve the problem that the function of the tensioner cannot be stably exerted

Active Publication Date: 2021-07-16
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In this way, the function of the tensioner cannot be performed stably

Method used

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  • chain tensioner
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Below, combined with the accompanying drawings Figure 1 to Figure 10 Embodiments of the chain tensioner of the present invention will be described.

[0046] figure 1 An example of a chain system for driving a camshaft of an engine using the chain tensioner of the present invention is shown.

[0047] In this chain system, the rotation of a sprocket 2 attached to a crankshaft 1 is transmitted to a sprocket 5 attached to a camshaft 4 via a chain 3 .

[0048] The slider 6 that can swing around the shaft 7 as a fulcrum is brought into contact with the slack side of the chain 3 , and the slider 6 is pressed by the chain tensioner 10 in the direction in which the chain extends (the direction in which the chain tension increases).

[0049] figure 1 The chain tensioner 10 is an engine built-in type. The detailed structure of this chain tensioner 10 is as figure 2 shown. Should figure 1 The chain tensioner 10 has a housing 11 fixed to a cylinder block (not shown) of a...

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PUM

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Abstract

The invention provides a chain tensioner, an internal thread (15) formed on a plunger (14) inserted into a cylinder chamber (12) of a casing (11) in a telescopic manner, and an internal thread (15) assembled on the plunger (14) The outer threads (17) of the outer circumference of the screw (16) on the inner side of the ) are formed in a serrated shape and are screwed together, so that the thread pitch of the inner thread (15) is smaller than the thread pitch of the outer thread (17), so that even when the Even when the oil supply is stopped and the function of the hydraulic shock absorber cannot be exerted, the protrusion of the plunger can be performed smoothly, and the tension of the chain by the tensioner can be stably maintained.

Description

technical field [0001] The present invention relates to a chain tensioner which keeps the tension of a camshaft driving chain of an engine constant, and more specifically relates to a tensioner of the type which absorbs tension fluctuations of a chain by using a hydraulic damper and when the hydraulic damper is not functioning. A chain tensioner that also exhibits stable performance. Background technique [0002] As a prior art of a chain tensioner for maintaining a constant tension of a drive chain, there is, for example, a configuration described in Japanese Patent Document 1 below. [0003] The chain tensioner of this Japanese Patent Document 1 has a bottomed cylindrical plunger for pressing a slider in contact with the slack side chain in the chain extending direction, and a screw rod is housed in the plunger. [0004] In addition, the plunger is inserted into a cylinder chamber of the case, and a return spring interposed between the plunger and the screw is biased in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H7/08
CPCF16H7/08F16B33/02F16H7/0848F16H2007/0857F16H2007/0859
Inventor 鬼丸好一前野荣二
Owner NTN CORP