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Gear

A technology of gears, paired gears, applied in the direction of belts/chains/gears, elements with teeth, portable lifting devices, etc.

Active Publication Date: 2008-09-10
ENPLAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the expansion portion 74 is formed on the basis of different shrinkage after injection molding, the expansion amount is small, so the expansion portion 74 cannot protrude very much from the tooth surface 75, and thus it is impossible to sufficiently absorb the shock.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0052] [First preferred embodiment]

[0053] Figure 1 to Figure 3 as well as Figure 4A to Figure 4C A first preferred embodiment of a gear 1 according to the invention is shown. figure 1 is the front view of gear 1 in this preferred embodiment, figure 2 is along figure 1 Sectional view of midline II-II, image 3 is along figure 2 A plan view of tooth 2 of gear 1 shown in the direction of arrow A, Figures 4A to 4C An enlarged view of a part of tooth 2.

[0054] In these figures, for example, the gear 1 of the present preferred embodiment is a spur gear formed by injection molding a resin material such as polyacetal, polyamide, polyphenylene sulfide, polybutylene terephthalate, or the like. The gear 1 has a plurality of teeth 2 on the outer circumference of a substantially disk-shaped plate 5 located on the outer circumferen...

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PUM

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Abstract

In a gear having teeth 2 on the outer periphery thereof, each of the teeth 2 has an elastically deformable overhanging portion 7 which is formed on one end face 6 in facewidth directions of a corresponding one of the teeth 2 so as to protrude from a portion near a tooth flank 8 of the corresponding one of the teeth 2 toward adjacent one of the teeth 2 , and a portion of the overhanging portion 7 contacting one of teeth of a companion gear is formed so as to have the same plane as that of the tooth flank 8 when the overhanging portion 7 is pressed by the one of teeth of the companion gear to be elastically deformed.

Description

technical field [0001] The present invention relates to a gear that can reduce noise and vibration during rotation transmission. Background technique [0002] In recent years, for example, many gears are used in the driving mechanism and the paper feeding mechanism of a typical inkjet printer used on a desk to transmit the rotation of the motor to the driven parts through these gears. In this inkjet printer, the driving mechanism of the printing part and the paper feeding mechanism are designed to rotate and stop frequently and repeatedly, so there will be such situations that a pair of gears meshing with each other will One of the gears may collide with another gear due to inertia, resulting in tooth knocking noise and noise due to vibration and so on. However, in order to provide a good office environment, the above-mentioned inkjet printers used on desks need to reduce the running noise so as to run as quietly as possible. Therefore, various gears have been devised to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/16B41J2/01F16H55/17F16H55/18
CPCF16H55/16Y10T74/19898
Inventor 萩原徹宅森徹
Owner ENPLAS CORP