JP3081252U - Worm wheel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To easily remove a mold when manufacturing by casting or plastic molding. SOLUTION: An arc-shaped tooth 3 is formed from an edge on one end side in the width direction of a worm wheel main body 2 to a center portion in the width direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a worm wheel.

[0002]

[Prior art]

 In the worm wheel, as shown in FIGS. 3 to 5, the teeth are formed over the entire width of the worm wheel body, and the center of the teeth in the width direction is depressed in an arc shape so as to embrace the periphery of the worm. Some are designed to make line contact. In the figure, 100 is a worm wheel main body, 101 is a tooth, 102 is a worm, and 103 is a worm tooth. FIGS. 4 and 5 show different examples of the worm wheel in line contact.

[0003]

[Problems to be solved by the invention]

 When such a worm wheel is manufactured by casting or plastic molding, it is difficult to remove the mold because the center in the width direction of the teeth 101 is concave in an arc shape as described above. There was a point. However, if the die can be removed, the product price can be significantly reduced.

The present invention has been made in view of the above circumstances, and has as its object to provide a worm wheel capable of easily performing die cutting.

[0005]

[Means for Solving the Problems]

 Thus, the gist of the present invention is that a worm wheel is formed such that arc-shaped teeth are formed from an edge at one end side in the width direction of the worm wheel body to a center portion in the width direction. It is in.

[0006]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a worm wheel according to an embodiment of the present invention, and FIG. 2 is a central longitudinal sectional side view.

In the figure, reference numeral 1 denotes a worm wheel, which is manufactured by casting or plastic molding. Reference numeral 2 denotes a worm wheel main body, and 3 denotes arc-shaped teeth formed on the worm wheel main body 2.

Further, the arc-shaped teeth are formed from the edge at one end side in the width direction of the worm wheel main body 2 to the center portion in the width direction. Since the arc-shaped teeth 3 are formed in this manner, they have half the width of the teeth of the conventional product shown in FIGS.

[0009]

[Effect of the invention]

 In the present invention, as described above, the arc-shaped teeth are formed from the edge at one end side in the width direction of the worm wheel body to the center portion in the width direction, so that the die can be easily removed when manufactured by casting or plastic molding. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a side view of a worm wheel according to an embodiment of the present invention.

FIG. 2 is a central vertical sectional side view of the worm wheel shown in FIG. 1;

FIG. 3 is a perspective view of a conventional worm wheel.

FIG. 4 is a partial sectional view of a conventional worm wheel and worm.

FIG. 5 is a partial sectional view of a worm and a worm according to an example different from that shown in FIG. 4 of the related art.

[Explanation of symbols]

 Reference Signs List 1 worm wheel 2 worm wheel body 3 arc-shaped teeth

Claims (1)

[Utility model registration claims] 1. A worm wheel, wherein arc-shaped teeth are formed from an edge on one end side in the width direction of the worm wheel main body to a center portion in the width direction.