A door moving apparatus includes a motor unit, a first gear, a second gear, an endless belt, a drum, and a rotator. The first gear is mounted on a rotary shaft of the motor unit. The second gear includes a diameter larger than a diameter of the first gear and teeth more than the first gear. The endless belt passes over the first gear and the second gear. A rotary power of the second gear is transmitted to the drum via a rotary power transmission mechanism. The rotator is configured to reduce a separation of the endless belt from a preset running path.

An object of the present invention is to provide a chain guide that can improve functional properties of a chain drive system. The chain guide of the present invention is attached to an engine block by a mounting bolt and slidably guides a running chain. The chain guide includes a mounting part provided with a shaft hole through which a mounting bolt is passed, and an oil jet passage for injecting lubricating oil, supplied to the shaft hole at a predetermined pressure, toward the chain.

An object of the present invention is to provide a chain guide that can improve functional properties of a chain drive system. The chain guide of the present invention is attached to an engine block by a mounting bolt and slidably guides a running chain. The chain guide includes a mounting part provided with a shaft hole through which a mounting bolt is passed, and an oil jet passage for injecting lubricating oil, supplied to the shaft hole at a predetermined pressure, toward the chain.

An object of the present invention is to provide a tensioner lever that can reduce vibration and noise when the chain runs, and realize smooth attachment into an engine with minimal deformation of the lever body with a simple configuration. A tensioner lever according to the present invention includes a lever body and a torsion coil spring pressed the lever body toward the chain. The lever body includes a stopper member mounting part where a stopper member by which the support arm of the torsion coil spring is locked and which retains the torsion coil spring in a compressed state is removably mounted. The stopper member mounting part is located closer to a distal end of the lever body than a center position in the longitudinal direction of the lever body, or a center of gravity position of the lever body.

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.

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.

A cam shaft drive device includes a chain, a guide lever, a chain chamber, which is provided in a cylinder head, a support bolt, which pivotably supports the guide lever, the support bolt including a head portion, a male screw portion, and a shaft portion, which is inserted through the support hole of the guide lever, an insertion hole, which is through which the support bolt is inserted, and a female screw hole, which is provided in the rear wall and into which the male screw portion is screwed, wherein a length from a rear end to a front end of the shaft portion is longer than an axial distance from a front end of the support hole to a front end of the insertion hole in a state where the guide lever abuts on the rear wall.

A cam shaft drive device includes a chain, a guide lever, a chain chamber, which is provided in a cylinder head, a support bolt, which pivotably supports the guide lever, the support bolt including a head portion, a male screw portion, and a shaft portion, which is inserted through the support hole of the guide lever, an insertion hole, which is through which the support bolt is inserted, and a female screw hole, which is provided in the rear wall and into which the male screw portion is screwed, wherein a length from a rear end to a front end of the shaft portion is longer than an axial distance from a front end of the support hole to a front end of the insertion hole in a state where the guide lever abuts on the rear wall.

A tooth jump protection device is used to control chain slack and delay the torque at which chain jump occurs, thus increasing jump torque performance. The tooth jump protection device is preferably mounted to the transfer case.

A tooth jump protection device is used to control chain slack and delay the torque at which chain jump occurs, thus increasing jump torque performance. The tooth jump protection device is preferably mounted to the transfer case.