Tensioner
A tensioner, housing technology, applied in belt/chain/gear, mechanical equipment, transmission, etc., can solve problems such as braking force change, large variable load, and wear of the treatment layer.
Inactive Publication Date: 2009-05-27
NHK SPRING CO LTD
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] However, in the conventional wear-resistant surface treatment of Kaningian electroless nickel plating, under the condition of large fluctuation load and severe vibration acting on the tensioner, there is still a problem that the treated layer wears out with the passage of time. , causing durability problems such as changes in braking force
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The present invention will be described in more detail below with reference to the accompanying drawings.
[0018] Fig. 1 is a sectional view showing a tensioner according to an embodiment of the present invention, figure 2 It is a sectional view of a part of an engine showing an example of use of the tensioner.
[0019] The tensioner is for example figure 2 The power transmission mechanism 201 of the illustrated automobile engine 200 is used. The power transmission mechanism 201 transmits the rotational motion of the engine 200 to the camshaft 203 via an endless force transmission member 202 such as a timing belt or a chain. The thrust pushes the force transmission member 202 in the direction indicated by the arrow V, and keeps the tension constant (fixed).
[0020] The tensioner shown in FIG. 1 has: a housing 1 formed with an axial cavity 1a; a rotating body 2 and a pressing body 3 inserted into the cavity 1a of the housing 1 in a screwed state; a torsion spring 4 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
Portions of a tensioner that affect braking force and other characteristics to the maximum extent wear less with operating time. Further, the braking force and other characteristics of the tensioner are affected less by varying lubricating conditions. As a result, the tensioner is capable of providing stable characteristics for a long period. A tensioner is characterized in that it has a case; a rotating body that is rotatably received in the case so as not to be movable in an axial direction; a pressing body that is screwed to the rotating body, movable in the axial direction, prevented from rotating relative to the case, and to which a load in the axial direction is applied from a force-transmitting member; and a spring that is received inside the case and applies a rotational force to the rotating body; where the rotating body is rotatably supported at its shaft portion by a supporting portion of the case and supports the load acting on the pressing body, and the pressing body is prevented from rotating by a bearing. The tensioner is further characterized in that, out of the surfaces of the rotating body, a shaft portion of the rotating body, the supporting portion of the case, the pressing body, and the bearing, at least the surface of the shaft portion of the rotating body is provided with a film of a ternary alloy of nickel, phosphorus, and tungsten, or a film of a ternary alloy of nickel, phosphorus, and boron.
Description
technical field [0001] The present invention relates to a tensioner that applies a predetermined tension to a force transmission member such as a chain or a timing belt that drives a camshaft of an engine mounted on, for example, a four-wheeled automobile or a two-wheeled vehicle Waiting for the vehicle. Background technique [0002] A tensioner is used to maintain a roughly constant tension on a chain or timing belt even if it loosens during use due to stretching or wear. As shown in FIG. 6, a conventional general tensioner has: a housing 101; a rotating body 102 having a male thread portion 102a; part 103a; spring 104, which urges the rotating body 102 in the first rotation direction; bearing 109, which constrains the rotation of the pressing body 103; and so on. When the rotating body 102 is rotated in the first direction by the spring 104, the pressing body 103 moves in the axial direction. The rotating body 102 is accommodated in the casing 101 , and the end surface ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F16H7/08
CPCF16H7/08F16H2007/081F16H2007/0891
Inventor 井上史久高桥郁臣天野种平
Owner NHK SPRING CO LTD