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Roller bearing internal pinion counter
| Details |
Inventors: Herr, Robert W.; Sigl, Edward D.;
Assignee: Bowmar Instrument Corporation (Fort Wayne, IN)
Primary Examiner: Tomsky; Stephen J.
Assistant Examiner:
Attorney, Agent or Firm: Gust, Irish, Jeffers & Hoffman
An internal pinion revolution counter includes a bearing member rotatably supporting an input shaft. At least first and second number wheels are provided each having a radially outwardly extending web portion joined to an annular flange portion, the first and second number wheel flange portions respectively extending toward each other. Each web portion has an annular bearing surface which defines a central opening. The flange portion of the first number wheel has an internal gear segment and cooperating internal locking cam formed thereon, and the flange portion of the second number wheel has an internal full tooth gear formed thereon. The first number wheel is connected to the input shaft for rotation therewith. A pinion carrier is arranged within the center opening in the web portion of the second number wheel, surrounds the input shaft, and is secured against rotation with respect to the input shaft. A transfer pinion is rotatably connected to the pinion carrier, has full tooth portions respectively meshing with the full tooth gear and the rear segment, and a mutilated portion cooperating with the locking cam. A plurality of rollers are rotatably connected to the pinion carrier and engage the bearing surface of the web portion of the second number wheel thereby rotatably to support the same. |
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DETAILED DESCRIPTION The invention, in its broader aspects, provides an internal pinion revolution counter of the internal gear type including a rotatable input shaft the revolutions of which are to be counted, a bearing member rotatably supporting the input shaft, and at least first and second number wheels each having a radially outwardly extending web portion joined to an outer annular flange portion, the first and second number wheel flange portions respectively extending toward each other.
Each web portion has a central opening formed therein, at least the second number wheel web portion having an annular bearing surface formed thereon defining the central opening therein.
The first number wheel flange portion has an internal gear segment and cooperating internal locking cam formed thereon, and the second number wheel flange portion has an internal full tooth gear formed thereon, and means are provided for mounting the first number wheel on the input shaft for rotation therewith.
A pinion carrier member is provided disposed within the opening in the second number wheel web portion and surrounding the shaft, and means are provided for securing the pinion carrier member against rotation with respect to the shaft.
A transfer pinion is provided with means for rotatably connecting the same to the pinion carrier member, the transfer pinion having full tooth portions respectively cooperating with the full tooth gear and the gear segment, and a mutilated portion cooperating with the locking cam.
A plurality of rollers are provided with means for rotatably connecting the rollers to the pinion carrier member, the rollers engaging the second number wheel web portion bearing surface thereby rotatably supporting the second number wheel on the pinion carrier member.
It is accordingly an object of the present invention to provide an improved internal pinion revolution counter of the internal gear type.
Another object of the present invention is to provide an improved internal pinion revolution counter of the internal gear type which permits adjustment of torque vis-a-vis backlash
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