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Chain Tensioner

A technology of chain tensioning device and tensioning device, which is applied in the direction of transmission device, belt/chain/gear, mechanical equipment, etc., can solve the problems of controlling pressing force, difficult to realize, not considering adjustment of oil pressure, etc. simple structure

Active Publication Date: 2015-10-14
TSUBAKIMOTO CHAIN CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, in the case of known technologies such as Patent Document 1 or Patent Document 2, the continuous oil supply flow path formed by the oil supply hole, the oil supply space, and the plunger supply hole is set so as to ensure that the oil is pressed in the protruding direction during operation. The flow of oil sufficient for the plunger does not consider adjusting the pressure of the oil at all, and it is difficult to control the pressing force according to the operating conditions during operation.
[0021] In addition, there is no known chain tensioner that is supposed to control the pressing force of the plunger according to the operating conditions by controlling the pressure of the oil supplied during operation.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0058] The chain tensioner 100 according to the first embodiment of the present invention will be described with reference to the drawings.

[0059] Such as Figure 1 to Figure 3 As shown, the chain tensioner 100 according to the first embodiment of the present invention includes: a tensioner main body 110 having a cylindrical plunger receiving hole with one side open; and a cylindrical plunger 120 slidably inserted into the in the plunger housing hole; and a coil spring 140 which is retractably accommodated in the pressure oil chamber 101 formed between the plunger housing hole and the rear end side of the plunger 120 and urges the plunger 120 in the protruding direction. afterburner unit.

[0060] The chain tensioner 100 according to this embodiment is a member fixed in an engine having a chain guide mechanism, and therefore, as figure 1 As shown, the tensioner body 110 has a mounting portion 116 having a mounting hole 117 through which a bolt or the like passes.

[0061...

Embodiment 2

[0104] The chain tensioner 200 according to the second embodiment of the present invention is as follows: Figure 14 , Figure 15 As shown, a cylindrical oil supply space 202 is formed between the main body groove portion 219 and the outer periphery of the plunger body 226. In this point, it is different from the chain tensioner 100 according to the first embodiment described above. The inner circumference 213 of the receiving hole forms the main body groove 219 by a main body annular recess with a larger diameter than the inner circumference 213 of the plunger receiving hole, and the other structures are the same (the symbols of the same members and structures are the hundreds digit is 2 , the last two digits are the same as those in the first embodiment).

[0105] The operation of the chain tensioner 200 according to this embodiment is the same as that of the chain tensioner 100 according to the above-mentioned first embodiment, and produces the same effect.

[0106] Furth...

Embodiment 3

[0112] The chain tensioner 300 according to the third embodiment of the present invention is as follows: Figure 17 As shown, compared with the first modified example of the chain tensioner 100 according to the first embodiment described above, two oil supply holes 314 with a smaller flow rate are provided at intervals in the protruding direction of the plunger 320 . , other structures are the same (the symbol of the same member and structure is a symbol with a hundred digit of 3, and the last two digits are the same as those of the first embodiment).

[0113] In the chain tensioner 300 according to this embodiment, the oil supplied from one oil supply hole 314a is set so that the plunger groove 322 faces only one oil supply hole 314a in the normal rotation range. The flow rate is reduced and supplied to the oil supply space 302 .

[0114] In the high-speed rotation region, by setting the plunger groove portion 322 to face the two oil supply holes 314a, b, a large amount of o...

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PUM

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Abstract

Provided is a chain tensioner that can, with a simple structure, supply sufficient and necessary oil when restarted after a long time after the stop of oil supply, and control pressing force in accordance with operating conditions during the drive, thereby reducing vibration of the chain not only when restarted but also during the drive. In a chain tensioner 100 in which a plunger 120 inserted in a plunger bore of a tensioner body 110 is biased outward by biasing means 140 provided in an oil pressure chamber 101 to be extendable and contractible, an oil supply hole 114, an oil supply space 102, and a plunger hole 124 that together form a continuous oil supply passage is formed in such a shape that an oil amount changes in accordance with a position of the plunger 120.

Description

technical field [0001] The present invention relates to a chain tensioner for properly maintaining the tension of the chain, comprising: a tensioner main body having a cylindrical plunger receiving hole with one side open; a plug receiving hole; and an urging unit which is retractably housed in a pressure oil chamber formed between the plunger receiving hole and a rear end side of the plunger and which urges in a protruding direction of the plunger. Background technique [0002] In the past, a chain tensioner that properly maintains the tension of the chain is generally used. For example, the following technology is known in which a jointless sleeve is aligned by moving a guide block between sprockets of a crankshaft and a camshaft respectively installed in an engine room. In the chain guide mechanism in which a transmission chain such as a rotating roller chain is slide-guided, a chain tensioner is used to apply force to an oscillating chain guide with a moving guide block ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H7/08F16H57/04
CPCF16H7/08F16H2007/0812F16H7/0829F16H7/0848F16H2007/0806F16H2007/0859
Inventor 榑松勇二高木雄大
Owner TSUBAKIMOTO CHAIN CO
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