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Tensioner

A technology of tensioning device and sleeve, applied in the direction of transmission device, belt/chain/gear, mechanical equipment, etc., can solve the problems of wear, sintering, the sliding property of plunger 540, the adverse effect of attenuation characteristics, etc., and reduce the required accuracy , The effect of avoiding the increase of the processing burden and reducing the work burden

Inactive Publication Date: 2017-02-15
TSUBAKIMOTO CHAIN CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the tensioner 510, there is a problem that since the tensioner body 520 is a die-cast product of cast iron or aluminum alloy, in order to prevent the plunger 540 from being worn out or sintered, and to obtain a tightness of the body hole 521 through which the plunger 540 slides, Surface accuracy and durability require film formation by coating treatment, smoothing treatment, machining, etc.
In addition, when the tensioner main body 520 and the plunger 540 are formed of different materials, there is a difference in the degree of thermal deformation, and this difference in thermal deformation may affect the slidability of the plunger 540 with respect to the tensioner main body 520 . , Attenuation characteristics have adverse effects

Method used

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Embodiment Construction

[0029] Hereinafter, a tension device 10 according to an embodiment of the present invention will be described with reference to the drawings.

[0030] First, the tensioner 10 of the present embodiment is mounted on a chain transmission used in a timing system of an automobile engine, etc., such as figure 1 As shown, it is installed on the engine body (not shown), and through the tensioner rod G, an appropriate tension is applied to the slack side of the transmission chain CH that is rotatable on the multiple sprockets S1-S3, and the vibration during movement is suppressed. .

[0031] Such as Figure 1 ~ Figure 3 As shown, the tensioning device 10 is provided with: a tensioning device main body 20 having a main body hole 21; a sleeve 30 inserted into the main body hole 21; Inside the sleeve 30 ; the check valve 50 ; and the coil spring 60 as an urging unit are freely accommodated in the pressure oil chamber 11 formed between the rear end side of the sleeve 30 and the rear en...

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PUM

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Abstract

Provided is a simple-structured tensioner that can reduce processing and assembling workload as well as increase the degree of design freedom. A tensioner (10) includes an oil supply hole (33) formed in a sleeve bottom (32) and a check valve (50) disposed on a front face of the sleeve bottom (32). The check valve (50) includes a check ball (51) and a retainer (52). The sleeve bottom (32) includes a ball seat (34) which protrudes in a cylindrical shape toward the front side integrally with and continuously from the edge of the oil supply hole (33) and on which the check ball (51) is seated.

Description

technical field [0001] The present invention relates to a tensioning device for applying proper tension to a moving chain or belt or the like. Background technique [0002] Conventionally, a tensioner is generally used in order to properly maintain the tension of a chain or the like. For example, there is known a technique in which a tensioner rod is provided between sprockets of a crankshaft and a camshaft respectively provided in an engine room (engine room). In a chain guide mechanism in which a transmission chain such as a roller chain that rotates without joints is slide-guided, a tensioner is used to apply force to the tensioner rod in order to properly maintain the tension of the chain, etc. [0003] Such as Figure 4 As schematically shown, a known tensioner 510 used in such a chain guide mechanism includes: a tensioner main body 520 having a main body hole 521 opened on one side; and a plunger 540 slidably inserted into the main body hole. 521; and a urging unit 56...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H7/08
CPCF16H7/08F16H7/0838F16H7/0848F16H2007/0812F16H2007/0859F16K15/044F16K27/0209F16H2007/0814
Inventor 国松幸平渡边将成
Owner TSUBAKIMOTO CHAIN CO
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