Power transmission chain pin and manufacture method thereof
a technology of transmission chain pin and manufacturing method, which is applied in the direction of driving chains, drawing dies, threaded fasteners, etc., can solve the problems of increasing manufacture costs, and achieve the effects of reducing pin work time, preventing environmental deterioration, and reducing manufacture costs
Inactive Publication Date: 2008-08-07
JTEKT CORP
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0007]An object of the invention is to provide a power transmission chain pin capable of reducing a manufacture cost by reducing a pin work time, and a manufacture method thereof.
[0023]According to the method of manufacturing the power transmission chain pin according to the invention, it is possible to manufacture the power transmission chain pin without the grinding step of grinding the end portion of the bar-like member, which has been cut into a predetermined length, using a grinding stone. Since the method does not include the grinding step, a work time is reduced. Additionally, it is not necessary to use a grinding fluid of which a waste fluid deteriorates an environment.
[0034]According to the power transmission chain pin and the manufacture method thereof, since a cold forging work is carried out, it is not necessary to carry out a cut step. Accordingly, it is possible to reduce a pin work time, and thus it is possible to reduce a manufacture cost. Moreover, it is possible to prevent a deterioration of an environment due to a grinding waste fluid.
Problems solved by technology
In the power transmission chain in JP-A-2004-251385, a plurality of pins are used, but it takes much time for working a pin, since an end portion of the pin needs to be subjected to a grinding work, which induces an increase in manufacture cost.
Method used
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Embodiment Construction
[0044]Hereinafter, an exemplary embodiment of the invention will be described with reference to the accompanying drawings. In the description as below, “upper and lower” indicates upper and lower sides in FIG. 2.
[0045]FIG. 1 illustrates a part of a power transmission chain to which a power transmission chain pin according to the invention is applied. A power transmission chain (1) includes a plurality of links (11) which have a front insertion through hole (12) and a back insertion through hole (13) arranged at a predetermined distance in a chain length direction, and a plurality of pins (first pin) (14) and interpieces (second pin) (15) which connect the links (11) arranged in the chain width direction so as to be bendable in the chain length direction. The interpiece (15) is shorter than the pin (14). The interpiece (15) is disposed in the front side and the pin (14) is disposed in the back side so as to be opposed to the interpiece (15).
[0046]One link unit is configured by arrang...
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Abstract
A manufacture method of a power transmission chain pin includes a work step of working a bar-like member of a predetermined length into a pin having a final sectional shape and a final end portion shape with a guide portion to facilitate a press-fitting operation by a cold forging work. At this time, the manufacture method does not include a grinding step of grinding an end portion of the bar-like member of the predetermined length by a grinding stone.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a power transmission chain pin and a manufacture method thereof, and more specifically, to a power transmission chain pin suitable for a continuously variable transmission (CVT) of a vehicle such as an automobile and a manufacture method thereof.[0003]2. Related Art[0004]As shown in FIG. 9, as a continuously variable transmission for an automobile, there is a known chain type continuously variable transmission including a drive pulley (2) which has a stationary sheave (2a) and a movable sheave (2b) and which is disposed in an engine; a driven pulley (3) which has a stationary sheave (3b) and a movable sheave (3a) and which is disposed in a drive wheel; and a power transmission chain (1) with an endless shape which is wound around the pulleys. At this time, a hydraulic actuator allows the movable sheaves (2b) and (3a) to move close or away to or from the stationary sheaves (2a) and (3b) s...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F16G13/06B21F45/18
CPCB21C3/04B21F11/00B21K1/06B21K1/44Y10T29/49783B21L9/065B23D15/002F16G5/18B21L9/04B21K1/00B21J5/08
Inventor MIURA, YOSHIHISA
Owner JTEKT CORP