Injection-molded resin face gear

a technology of injection molding resin and face gear, which is applied in the direction of gearing, hoisting equipment, other domestic objects, etc., can solve the problems of difficult gear accuracy may deteriorate, etc., and achieve accurate and smooth rotation transmission, suppress the effect of gear accuracy deterioration

Inactive Publication Date: 2015-05-19
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This configuration suppresses tooth collapse and maintains gear accuracy, enabling smooth and accurate rotation transmission by evenly distributing resin shrinkage and enhancing surface rigidity.

Problems solved by technology

Gear accuracy may deteriorate, thereby making accurate and smooth rotation transmission difficult.

Method used

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  • Injection-molded resin face gear
  • Injection-molded resin face gear
  • Injection-molded resin face gear

Examples

Experimental program
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Effect test

Embodiment Construction

[0023]Embodiments of the present invention will be described in detail, with reference to the drawings.

[0024]FIG. 1 to FIG. 5 are diagrams of an injection-molded resin face gear 1 according to an embodiment of the invention. FIG. 1A is a front view of the injection-molded resin face gear 1 (an injection-molded resin face gear 1 in FIG. 2 viewed from direction A). FIG. 1B is an enlarged view of portion B in FIG. 1A. FIG. 2 is a side view of the injection-molded resin face gear 1 (viewed from direction C in FIG. 1). FIG. 3 is a rear view of the injection-molded resin face gear 1 (the injection-molded resin face gear in FIG. 2 viewed from direction D). FIG. 4 is a cross-sectional view taken along line E-E in FIG. 1. FIG. 5 is an enlarged view of portion F in FIG. 4.

[0025]As shown in the diagrams, the injection-molded resin face gear 1 according to the embodiment includes a cylindrical boss 3, a disk-shaped web 4, and a teeth section 5. The boss 3 has an axis hole 2. The web 4 is formed...

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PUM

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Abstract

An injection-molded resin face gear that can suppress deterioration of gear accuracy caused by shrinkage of resin material after injection molding and allow accurate and smooth rotation transmission is provided.An injection-molded resin face gear 1 includes a boss 3, a disk-shaped web 4, and a teeth section 5. The boss 3 has an axis hole 2. The web 4 is formed on an outer circumferential side of the boss in an outward radial direction. The teeth section 5 is formed on an outer circumferential edge of the web 4. The teeth section 5 includes a cylindrical section 13, a disk-shaped section 14, and a plurality of teeth 15. The cylindrical section 13 is connected to the outer circumferential edge of the web 4. The disk-shaped section 14 is formed on one end side of the cylindrical section 13 in the outward radial direction. The teeth 15 are formed evenly spaced on an outer circumferential side of the cylindrical section 13 such that one side surface of the disk-shaped section 14 is a bottom land 16. The web 4, the cylindrical section 13, and the disk-shaped section 14 have almost the same thicknesses. The outer circumferential edge of the web 4 is connected between an end surface 19 and an end surface 22 of the cylindrical section 13, in almost the center in a direction along a rotational center axis CL.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an injection-molded resin face gear used to allow power transmission and rotation transmission between two perpendicular axes.[0003]2. Description of the Related Art[0004]In recent years, in technical fields related to power transmission devices using gears, resin gears are used being in place of metal gears to achieve quieter operation noise, reduced weight, and lower costs.[0005]Based on such technical background of recent years, there is discussion regarding forming a face gear 100, such as that shown in FIG. 9 and FIG. 10, using resin. In the face gear 100 shown in the drawings, a roughly disk-shaped web 102 is formed on an outer circumferential side of an axis section 101. A teeth section 103 is formed on an outer circumferential edge of the web 102. The teeth section 103 of the face gear 100 is formed such that teeth 104 of the teeth section 103 project towards one side surface 105...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): F16H1/12F16H55/06
CPCB29C45/0025B29L2015/003F16H55/06F16H55/17F16H2055/173Y10S74/10Y10T74/1966Y10T74/19949
InventorSUZUKI, YASUHIRO
OwnerENPLAS CORP