Arc gear and arc rack

Abstract

The invention discloses an arc gear and an arc rack. The maximum curvature radiuses of convexity tooth lines of wheel teeth and tooth bodies are smaller than the minimum curvature radiuses of concavity tooth lines; therefore, after two meshed gears or a gear and a rack are meshed and assembled, under an ideal condition, the convexity tooth lines and the concavity tooth lines are meshed by a point contact mode; during actual use, in a stage of starting meshing, the convexity tooth lines and the concavity tooth lines are still meshed by the point contact mode, and the difference is only that the point contact positions are different, that is, the convexity tooth lines and the concavity tooth lines are only instantly meshed and then are continuously abraded between the wheel teeth or between the wheel teeth and the tooth bodies; actually, quite long line segments of the concavity tooth lines and the convexity tooth lines are in contact, so that after two components subjected to meshing transmission are subjected to running in, the concavity tooth lines and the convexity tooth lines are meshed in a linear contact manner; therefore, the requirement on the error sensitivity of a center distance, a helical angle and the like in an assembling process is reduced, and the two components subjected to meshing transmission are more easily assembled.

Description

technical field

[0001] The invention relates to an arc gear and an arc rack. Background technique

[0002] Gear transmission is one of the main forms of mechanical transmission. Because of its advantages such as large speed ratio range, wide power range, compact and reliable structure, etc., it has been widely used in various mechanical equipment and instruments, and has become the most popular in existing mechanical products. The transmission with the largest proportion. The existing cylindrical gear transmission has three types of spur gears, helical cylindrical gears and herringbone cylindrical gears, but due to structural reasons, the above-mentioned cylindrical gears have certain defects (see Journal of Pingxiang College. 2001( 4): 17-21——arch arc tooth cylindrical gear[J]), for this reason, more and more arc tooth cylindrical gears are used in gear transmission. Its main feature is that the teeth on the cylinder are arc-shaped, and the traditional The tooth profile o...

Examples

Embodiment Construction

[0025] The embodiment of arc gear of the present invention: as Figure 5 to Figure 7 As shown, the arc gear is a kind of cylindrical gear with unequal diameter circular arc teeth. The arc-shaped tooth surfaces on the opposite sides of the tooth are respectively concave tooth surfaces and convex tooth surfaces, wherein the tooth lines of the convex tooth surfaces on the indexing cylinder surface are arc-shaped convex tooth lines 22, and the concave tooth surfaces are divided into The expanded tooth line on the degree cylindrical surface is an arc-shaped concave tooth line 21, the centers of the convex tooth line 22 and the concave tooth line 21 are on the symmetrical midline of the indexing cylindrical surface development surface, and the arc radius Re of the convex tooth line 22 is It is smaller than the arc radius Ri of the concave tooth line 21. Under the condition of maintaining the equal tooth thickness of the existing gear teeth, the spacing distance between the center O...

technical field

[0001] The invention relates to an arc gear and an arc rack. Background technique

[0002] Gear transmission is one of the main forms of mechanical transmission. Because of its advantages such as large speed ratio range, wide power range, compact and reliable structure, etc., it has been widely used in various mechanical equipment and instruments, and has become the most popular in existing mechanical products. The transmission with the largest proportion. The existing cylindrical gear transmission has three types of spur gears, helical cylindrical gears and herringbone cylindrical gears, but due to structural reasons, the above-mentioned cylindrical gears have certain defects (see Journal of Pingxiang College. 2001( 4): 17-21——arch arc tooth cylindrical gear[J]), for this reason, more and more arc tooth cylindrical gears are used in gear transmission. Its main feature is that the teeth on the cylinder are arc-shaped, and the traditional The tooth profile o...

Examples

Embodiment Construction

[0025] The embodiment of arc gear of the present invention: as Figure 5 to Figure 7 As shown, the arc gear is a kind of cylindrical gear with unequal diameter circular arc teeth. The arc-shaped tooth surfaces on the opposite sides of the tooth are respectively concave tooth surfaces and convex tooth surfaces, wherein the tooth lines of the convex tooth surfaces on the indexing cylinder surface are arc-shaped convex tooth lines 22, and the concave tooth surfaces are divided into The expanded tooth line on the degree cylindrical surface is an arc-shaped concave tooth line 21, the centers of the convex tooth line 22 and the concave tooth line 21 are on the symmetrical midline of the indexing cylindrical surface development surface, and the arc radius Re of the convex tooth line 22 is It is smaller than the arc radius Ri of the concave tooth line 21. Under the condition of maintaining the equal tooth thickness of the existing gear teeth, the spacing distance between the center O...

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