Attachment structure of auto tensioner
AssigneeYanmar Power Technology Co., Ltd.
InventorHiroaki Naganawa
Life of this patent
Estimating the term…
Abstract
An auto tensioner is supported on one side surface of a cylinder block (the outer surface of a front wall part) via a bracket. The auto tensioner includes: a tension pulley that is pressed against a belt; an arm that rotatably supports the tension pulley and is swingably supported to the bracket; and a hydraulic actuator that is supported by the arm and bracket to adjust the pressing force of the tension pulley to the belt using a predetermined position of the arm as a supporting point. The hydraulic actuator is disposed outside the water pump on the front wall part of the cylinder block.
Claims20
An attachment structure of an auto tensioner that is configured to automatically adjust tension of a belt wrapped around a crank pulley and an auxiliary pulley disposed on one side surface of a cylinder block of an engine, wherein:
- the auto tensioner is attached to the one side surface of the cylinder block via a bracket, the auto tensioner comprises:
- a tension pulley that is pressed against the belt;
- an arm that rotatably supports the tension pulley and is swingably supported by the bracket;
- and
- a hydraulic actuator that is supported by the arm and the bracket and is configured to adjust a pressing force of the tension pulley against the belt while using a predetermined position of the arm as a fulcrum,
- wherein the auto tensioner is attached to the one side surface of the cylinder block such that the hydraulic actuator is adjacent to a water pump installed in the cylinder block.
An engine comprising:
- a cylinder block;
- an auto tensioner attached to a side of the cylinder block via a bracket, wherein the auto tensioner is configured to automatically adjust tension of a belt wrapped around a crank pulley and an auxiliary pulley disposed on the side of the cylinder block, wherein the auto tensioner comprises:
- a tension pulley that contacts the belt;
- an arm that rotatably supports the tension pulley and is pivotably supported by the bracket;
- and
- a hydraulic actuator that is supported by the arm and the bracket and configured to adjust a pressing force of the tension pulley against the belt while using a predetermined position of the arm as a fulcrum,
- wherein the bracket includes a protrusion configured to be engaged by a first tool.
An attachment structure of an auto tensioner that is configured to automatically adjust tension of a belt wrapped around a crank pulley and an auxiliary pulley disposed on one side surface of a cylinder block of an engine, wherein:
- the auto tensioner is attached to the one side surface of the cylinder block via a bracket, the auto tensioner comprises:
- a tension pulley that is pressed against the belt;
- an arm that rotatably supports the tension pulley and is swingably supported by the bracket;
- and
- a hydraulic actuator that is supported by the arm and the bracket to adjust a pressing force of the tension pulley against the belt while using a predetermined position of the arm as a fulcrum,
- the bracket includes a first scale and a second scale,
- the arm includes an indicator, and
- the bracket and the arm are configured such that the indicator moves between the first and second scales based on a stretched state of the belt.
Dependencies are inferred from the claim text.