Tensioner

Abstract

Provided is a tensioner in which the durability of the tensioner body is increased, the tensioner body is reduced in weight, and the arrangement space is reduced. A tensioner 100 includes a tensioner body 110, a plunger 120, and a ratchet 130. The tensioner body 110 has a hole outer circumferential wall 112 and a pair of pin support walls 116, 117. The hole outer circumferential wall 112 has a pair of outer circumferential wall portions 113, 114 crossing a virtual line L extending in the pin longitudinal direction through the center of the plunger housing hole 111. At least one of the outer side surfaces of the pair of pin support walls 116, 117 is formed on the inner side, in the pin longitudinal direction, of the outer side surface of one of the outer circumferential wall portions 113, 114.

Description

technical field [0001] The present invention relates to a tensioning device for applying proper tension to a transmission belt, a transmission chain in a timing system of an engine and the like. Background technique [0002] In the past, the following tensioning devices 500 have been widely used (for example, refer to Patent Documents 1, 2, 3, etc.), such as Figure 10 ~ Figure 12 As shown, it is provided with: a tensioning device main body 510 having a plunger receiving hole 511 and a ratchet receiving groove 515; a plunger 520 slidably inserted into the plunger receiving hole 511; The ratchet pin 540 of 510 is disposed in the ratchet receiving groove 515 in a swingable state, and cooperates with the plunger 520 to limit the movement of the plunger 520 to the receiving side. [0003] like Figure 10 ~ Figure 12 As shown, the tensioner main body 510 has: a hole peripheral wall 512 disposed on the periphery of the plunger receiving hole 511; Both end sides of the ratchet pin...

AI Technical Summary

Problems solved by technology

[0009] However, in the existing tensioning device 500, such as Figure 10 ~ Figure 12 As shown, since the outer surface of the second pin support wall 517 is formed to be flush with the outer surface of the second outer peripheral wall portion 514, the stopper rod 550 protrudes outward compared with the outer surface of the second outer peripheral wall portion 514. When installing the engine front case C, it is necessary to arrange the engine front case C so that it does not interfere with the stopper rod 550. As a result, only the stopper rod 550 is an additional part, and a large space for the engine needs to be secured.

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