Abstract: To provide a simple-structured chain guide assembly frame capable of reliably maintaining a correct positional relationship between a driven sprocket and a sprocket holding portion without the possibility of driven sprocket detachment. The chain guide assembly frame includes a main body having a fixed-guide-side sprocket holding portion and a pivoting-guide-side sprocket holding portion. The fixed-guide-side sprocket holding portion includes a first fixed-guide-side support portion that supports a driven sprocket at a first contact point, and a second fixed-guide-side support portion that supports the driven sprocket at a second contact point located more outside than the first contact point. When the driven sprocket is in an erected state in which the driven sprocket is supported at the first contact point and second contact point, the vector of gravity acting on the gravity center of the driven sprocket points between the first contact point and second contact point.

Abstract: To provide a chain guide assembly frame capable of efficiently collecting the oil that adhered to various parts of the chain guide assembly, and guiding the collected oil to predetermined locations, to allow efficient use of oil, with a simple structure. The chain guide assembly frame includes driven sprocket holding portions, a fixed chain guide, and a pivoting chain guide holding portion on a main body. A drive sprocket holding portion is provided at a position lower than the driven sprocket holding portions. The main body includes a concave and/or convex oil passage that extends from an upper part toward a lower part to guide the oil toward above the drive sprocket holding portion.

Abstract: To provide a chain guide, chain drive device, and transmission system, with which an amount of lubricating oil supplied to guide surfaces is increased. The chain guide includes an upper additional extension formed to extend from an upper end of a sliding guide part in the guide longitudinal direction and having an oil-recovery guide surface positioned opposite and spaced from the chain.

Abstract: An object of the present invention is to provide a chain guide mechanism that can readily integrate all the components in a simple structure and enhance work efficiency during assembly or maintenance. The chain guide mechanism of the present invention is configured to be able to integrally support, on a frame, components including a plurality of sprockets, a chain, a fixed chain guide, and a pivoting chain guide. The frame includes a pivoting chain guide holding part that holds a mounting boss of the pivoting chain guide in a state of a loose fit. The pivoting chain guide holding part is configured to allow the mounting boss to be fitted therethrough from one side.

Abstract: To provide a chain guide assembly frame capable of efficiently collecting the oil that adhered to various parts of the chain guide assembly, and guiding the collected oil to predetermined locations, to allow efficient use of oil, with a simple structure. The chain guide assembly frame includes driven sprocket holding portions, a fixed chain guide, and a pivoting chain guide holding portion on a main body. A drive sprocket holding portion is provided at a position lower than the driven sprocket holding portions. The main body includes a concave and/or convex oil passage that extends from an upper part toward a lower part to guide the oil toward above the drive sprocket holding portion.

Abstract: To provide a simple-structured chain guide assembly frame capable of reliably maintaining a correct positional relationship between a driven sprocket and a sprocket holding portion without the possibility of driven sprocket detachment. The chain guide assembly frame includes a main body having a fixed-guide-side sprocket holding portion and a pivoting-guide-side sprocket holding portion. The fixed-guide-side sprocket holding portion includes a first fixed-guide-side support portion that supports a driven sprocket at a first contact point, and a second fixed-guide-side support portion that supports the driven sprocket at a second contact point located more outside than the first contact point. When the driven sprocket is in an erected state in which the driven sprocket is supported at the first contact point and second contact point, the vector of gravity acting on the gravity center of the driven sprocket points between the first contact point and second contact point.

Abstract: An object of the present invention is to provide a chain guide mechanism that can readily integrate all the components in a simple structure and enhance work efficiency during assembly or maintenance. The chain guide mechanism of the present invention is configured to be able to integrally support, on a frame, components including a plurality of sprockets, a chain, a fixed chain guide, and a pivoting chain guide. The frame includes a pivoting chain guide holding part that holds a mounting boss of the pivoting chain guide in a state of a loose fit. The pivoting chain guide holding part is configured to allow the mounting boss to be fitted therethrough from one side.

Abstract: An object of the present invention is to provide a chain guide, which allows easy assembling of a guide shoe to a base member, and reliably prevents detachment of the guide shoe from the base member resulting from vibration or the like during the running of a chain. Provided is a chain guide wherein a base member includes an attachment extension extending upward from a base body part beyond a support surface, and a base-side engaged part formed in the attachment extension, a guide shoe includes a flexible extension extending from a shoe body part, and a shoe-side engaging part formed in the flexible extension, and the shoe-side engaging part is hooked to the base-side engaged part from below, or diagonally from below, or from front or back, to be positioned on the far side of the base-side engaged part during engagement therebetween.

Abstract: To provide a chain guide mechanism that enables a plurality of chain guides, a chain, and a sprocket to be held together with a simple structure, such that work efficiency during assembly and maintenance is improved. The chain guide mechanism joins a plurality of chain guides that slidably guide a chain; and a connection unit is made up of arm members that extend from both sides of the chain on a chain running surface of a fixed chain guide toward a pivoting chain guide, and a coupling member including a fitting hole for a mounting boss of the pivoting chain guide to fit in.

Abstract: Provided is a tensioner which can ensure, with a simple structure, both the stability of the installation state of a check valve and the capacity of an oil storage chamber. A tensioner has a plunger, a housing, a check valve, and a coil spring. The plunger has a front-side plunger part having a pressing front end portion, and a rear-side plunger part disposed on the rear side of the front-side plunger part and having a valve movement restricting portion. The check valve is disposed on the rear side of the valve movement restricting portion. The coil spring is disposed so that one end thereof is in contact with a housing bottom portion and the other end thereof is in contact with the rear side of the check valve.

Abstract: An object of the present invention is to provide a chain guide, which allows easy assembling of a guide shoe to a base member, and reliably prevents detachment of the guide shoe from the base member resulting from vibration or the like during the running of a chain. Provided is a chain guide wherein a base member includes an attachment extension extending upward from a base body part beyond a support surface, and a base-side engaged part formed in the attachment extension, a guide shoe includes a flexible extension extending from a shoe body part, and a shoe-side engaging part formed in the flexible extension, and the shoe-side engaging part is hooked to the base-side engaged part from below, or diagonally from below, or from front or back, to be positioned on the far side of the base-side engaged part during engagement therebetween.

Abstract: To provide a chain guide mechanism that enables a plurality of chain guides, a chain, and a sprocket to be held together with a simple structure, such that work efficiency during assembly and maintenance is improved. The chain guide mechanism joins a plurality of chain guides that slidably guide a chain; and a connection unit is made up of arm members that extend from both sides of the chain on a chain running surface of a fixed chain guide toward a pivoting chain guide, and a coupling member including a fitting hole for a mounting boss of the pivoting chain guide to fit in.

Abstract: An object of the present invention is to provide a tensioner and a rocking lever that have simple configurations and that enable an increase in the volume of a space provided inside a plunger, the tensioner and the rocking lever being capable of preventing a stopper pin from being damaged or falling out. A plunger pin hole 121 is formed in a plunger 120 of a tensioner 100. In a tensioner body 110, a body pin hole 113 is formed in a tip protruding portion 112 provided so as to protrude from a side of an opening of the plunger housing hole 121. One of lips 154 provided on opposite sides, in a width direction, of the pressing surface 153 of a rocking lever 150 so as to protrude from the pressing surface 153, has a thinned portion 155 thinned in the width direction.

Abstract: Provided is a tensioner which can ensure, with a simple structure, both the stability of the installation state of a check valve and the capacity of an oil storage chamber. A tensioner has a plunger, a housing, a check valve, and a coil spring. The plunger has a front-side plunger part having a pressing front end portion, and a rear-side plunger part disposed on the rear side of the front-side plunger part and having a valve movement restricting portion. The check valve is disposed on the rear side of the valve movement restricting portion. The coil spring is disposed so that one end thereof is in contact with a housing bottom portion and the other end thereof is in contact with the rear side of the check valve.

Abstract: To provide a tensioner which can circulate a sufficient amount of oil even if there is a long time lag until pressurized oil starts to be supplied, and which exhibits a lower level of leak of oil stored therein, and which is structured simply without increasing the number of components therefore. The tensioner includes: a tensioner body having a plunger bore; a cylindrical plunger slidably inserted into the plunger bore; and biasing means for urging the plunger outward. When the tensioner is fixed to a wall surface, a body hole that extends from the wall surface up to a circumferential surface of the plunger bore is located lower than an oil discharge hole in the wall surface.

Abstract: An object of the present invention is to provide a tensioner and a rocking lever that have simple configurations and that enable an increase in the volume of a space provided inside a plunger, the tensioner and the rocking lever being capable of preventing a stopper pin from being damaged or falling out. A plunger pin hole 121 is formed in a plunger 120 of a tensioner 100. In a tensioner body 110, a body pin hole 113 is formed in a tip protruding portion 112 provided so as to protrude from a side of an opening of the plunger housing hole 121. One of lips 154 provided on opposite sides, in a width direction, of the pressing surface 153 of a rocking lever 150 so as to protrude from the pressing surface 153, has a thinned portion 155 thinned in the width direction.

Abstract: To provide a tensioner which can circulate a sufficient amount of oil even if there is a long time lag until pressurized oil starts to be supplied, and which exhibits a lower level of leak of oil stored therein, and which is structured simply without increasing the number of components therefore. The tensioner includes: a tensioner body having a plunger bore; a cylindrical plunger slidably inserted into the plunger bore; and biasing means for urging the plunger outward. When the tensioner is fixed to a wall surface, a body hole that extends from the wall surface up to a circumferential surface of the plunger bore is located lower than an oil discharge hole in the wall surface.

Abstract: A ratchet-type tensioner, comprising: a housing; a plunger supported by the housing for movement in opposite advancing and setback directions, the plunger having rack teeth provided thereon, and being arranged to advance with respect to the housing along the advancing direction for applying tension to a traveling transmission medium engaged with rotating members; and a ratchet mechanism capable of restricting the plunger from setting back due to a reaction force acting in a setback direction from the transmission medium; said ratchet mechanism comprising: a ratchet-receiving hole provided within the housing; a ratchet element slidable in the ratchet-receiving hole and movable in a sliding direction transverse to the advancing and setback directions; ratchet teeth on the ratchet element engageable with the rack teeth of the plunger; and a ratchet-biasing means for biasing the ratchet element in an engaging direction along the sliding direction so that the ratchet teeth engage with the rack teeth; said ratchet

Abstract: Deaeration of the high pressure oil chamber of a hydraulic tensioner takes place though a helical orifice formed by opposed flanks of the threads of a threaded hole in the tensioner housing and the threads of a screw inserted into the hole. The opposed flanks are maintained in spaced relationship by a force exerted by a spring washer disposed between the head of the screw and a surface of the tensioner housing surrounding the opening of the threaded hole. The flank of the thread of the hole that forms part of the boundary of the helical orifice can have a concave curvature in order to increase the aperture of the air flow path. A groove in the surface surrounding the opening of the threaded hole prevents the washer from sealing off the flow of air. This groove is disposed with its exit end at a level above its entry end.

Abstract: There is provided a ratchet-type tensioner whose spring stopping washer for seating a ratchet biasing spring is rigidly and readily assembled to a ratchet-receiving hole so as not to fall out of the ratchet-receiving hole and which reduces flapping noise and prevents seizure of the plunger by securely and stably operating a ratchet mechanism in operating an engine. The ratchet-type tensioner 100 is arranged so that the spring stopping washer has a C-ring anchored in the rear-end area of the ratchet-receiving hole by fitting in a diameter-reduced state and by enlarging its diameter within an anchoring circumferential groove of the ratchet-receiving hole and a spring stopping piece extended from the C-ring to a ring center area to seat the ratchet biasing spring.