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Tensioner

A technology of tensioner and guide, applied in the direction of belts/chains/gears, mechanical equipment, transmission devices, etc., can solve the problems of unstable forward and backward movement and unstable rotation of the propulsion shaft 130, so as to ensure frictional torque, rotation Action stabilization effect

Active Publication Date: 2012-10-24
NHK SPRING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] exist Figure 19 and Figure 20 In the shown tensioner 100, there is a problem that the rotating shaft 120 that is biased by the biasing spring 150 rotates slippingly or rotates slightly in the forward and reverse direction. Problem with propulsion shaft 130 making unstable back and forth motion

Method used

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Embodiment Construction

[0051] Hereinafter, the present invention will be specifically described with reference to the illustrated embodiments. In addition, in each embodiment, for the same components, the labels correspond to the same symbols.

[0052] Figure 1 to Figure 6 The tensioner A1 of the first embodiment of the present invention is shown. The tensioner A1 includes a housing 2 , a first shaft member 3 , a second shaft member 4 , an urging spring 5 , a friction member 6 , and an elastic member 7 .

[0053] The housing 2 includes a main body portion 2a and a flange portion 2b. The flange portion 2b is elongated in a direction perpendicular to the axial direction, and the main body portion 2a is elongated in the axial direction from the side of the flange portion 2b. The main body part 2a is formed with the accommodation hole 2c. The front end portion of the housing hole 2c is opened, and the assembly of the first shaft member 3, the second shaft member 4, the urging spring 5, the friction...

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Abstract

A tensioner adapted so that a second shaft member is stably propelled. An inner first shaft member (3) and an outer second shaft member (4), which are connected by screw sections (8, 10), and an urging spring (5) for urging the first shaft member (3) in one direction are received in a case (2). Rotation of the second shaft member (4) is restrained, and rotational urging force of the urging spring(5) is converted into propelling force of the second shaft member (4). The first shaft member (3) is rotated with its shaft end portion directly or indirectly in contact with the case (2). A frictionmember (6) for generating frictional force between itself and the first shaft member (3) is provided so as to be directly or indirectly in contact with the first shaft member (3). An elastic member (7) is provided on the radially outer side of the second shaft member (4). The elastic member (7) urges the friction member (6) in the direction in which it is in contact with the first shaft member (3), and this stabilizes propelling of the second shaft member (4).

Description

technical field [0001] The present invention relates to a tensioner for maintaining constant tension in an endless (endless) belt or chain. Background technique [0002] The tensioner has the following functions, that is, to press the timing chain or timing belt used in automobile engines with a specified force, and to maintain a constant tension when the timing chain or timing belt is stretched or slack. [0003] Figure 18 A state in which the tensioner 100 is attached to an automobile engine body 200 is shown. A pair of cam sprockets 210 , 210 and a crank sprocket 220 are disposed inside the engine main body 200 , and a timing chain 230 is endlessly stretched between the sprockets 210 , 210 , and 220 . On the movement path of the timing chain 230 , a chain guide 240 is arranged to be swingable, and the timing chain 230 slides on the chain guide 240 . A mounting surface 250 is formed on the engine main body 200 , and the tensioner 100 is fixed to the mounting surface 250...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H7/08
CPCF16H7/0831F16H2007/081
Inventor 小林贵雄天野种平高桥郁臣井上史久伊藤隆广
Owner NHK SPRING CO LTD
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