阅读说明：本技术 用于环形齿轮的齿轮齿倒角 (Gear tooth chamfer for ring gear ) 是由 布鲁诺·卡波尔迪 齐格弗里德·德瑞尔 于 2020-10-19 设计创作，主要内容包括：一种轴承包括轴承圈和多个齿轮齿,所述轴承圈具有环形基部并且所述多个齿轮齿与所述环形基部一体地形成。所述多个齿轮齿中的每个齿轮齿包括从所述环形基部基本在径向上延伸的第一齿侧表面、基本在轴向方向上延伸的齿顶表面以及位于所述齿顶表面与所述第一齿侧表面之间的倒角表面。所述倒角表面包括具有第一半径的第一弧形部,所述第一半径在所述轴承圈的齿轮模数的0.1倍至0.15倍的范围内。所述第一弧形部具有与所述第一齿侧表面的切点。所述倒角表面具有在所述切点与所述齿顶表面之间在径向方向上延伸的长度P,并且P在所述轴承圈的齿轮模数的0.1倍至0.15倍的范围内。(A bearing includes a bearing ring having an annular base and a plurality of gear teeth integrally formed with the annular base. Each gear tooth of the plurality of gear teeth includes a first flank surface extending substantially radially from the annular base, a crest surface extending substantially in an axial direction, and a chamfer surface between the crest surface and the first flank surface. The chamfer surface includes a first arcuate portion having a first radius in a range of 0.1 to 0.15 times a gear module of the bearing ring. The first arcuate portion has a tangent point with the first flank surface. The chamfer surface has a length P extending in a radial direction between the tangent point and the addendum surface, and P is in a range of 0.1 to 0.15 times a gear module of the bearing ring.)

1. A bearing, comprising:

a bearing ring comprising an annular base and a gear module m;

a plurality of gear teeth connected to the annular base and positioned circumferentially around the annular base; and is

Each gear tooth of the plurality of gear teeth includes a first flank surface extending from the annular base, a crest surface extending from the first flank surface, and a second surface located between the crest surface and the first flank surface, the second surface including a first arcuate surface having a first radius, the first radius being greater than or equal to 0.1m and less than or equal to 0.15 m.

2. The bearing of claim 1, wherein the first flank surface is tangent to the first arcuate surface to define a tangent point.

3. The bearing of claim 2, wherein a length P extends between the tangent point and an outer line that is coplanar with the addendum surface, and wherein the length P is greater than or equal to 0.1m and less than or equal to 0.15 m.

4. A bearing according to claim 3, wherein the length P measured perpendicular to the outer line to the tangent point is ≥ 0.1m and ≤ 0.15 m.

5. The bearing of claim 1, wherein each gear tooth of the plurality of gear teeth further comprises:

a corner edge between the second surface and the addendum surface; and is

The first arcuate surface of the second surface abuts the first flank surface.

6. The bearing of claim 1, wherein each gear tooth of the plurality of gear teeth further comprises:

a third surface between the second surface and the addendum surface, the third surface being substantially linear.

7. The bearing of claim 1, wherein each gear tooth of the plurality of gear teeth further comprises:

a second flank surface extending from the annular base and a fourth surface located between the second flank surface and the addendum surface,

wherein the fourth surface comprises a second arcuate portion having a second radius substantially equal to the first radius.

8. The bearing of claim 1, wherein the first flank surface extends in a substantially radial direction from the annular base and the addendum surface extends in a substantially axial direction.

9. A gear tooth for a bearing, the bearing including an annular ring having an annular base and a gear module m, the gear tooth comprising:

a first flank surface contiguous with and extending from the annular base;

a second surface contiguous with and extending from the first flank surface;

a first arcuate surface formed in the second surface and the first flank surface tangent to the first arcuate surface at a tangent point;

a tooth tip surface contiguous with and extending from the second surface; and

and the length P extends from the tangent point to a line coplanar with the tooth crest surface, and is more than or equal to 0.1m and less than or equal to 0.15 m.

10. The gear tooth of claim 9, wherein said first arcuate surface has a first radius ≧ 0.1m and ≤ 0.15 m.

11. The gear tooth of claim 9, wherein said tooth tip surface and said second surface abut and form an angled edge.

12. The gear tooth according to claim 9, wherein said length P measured perpendicular to an outside line to said tangent point is ≧ 0.1m and ≦ 0.15 m.

13. The gear tooth of claim 9, further comprising:

a second flank surface extending from the annular base;

a third surface contiguous with the second flank surface and the addendum surface; and

a second arcuate surface formed in the third surface.

14. The gear tooth of claim 13, wherein said second arcuate surface further comprises:

a second radius substantially equal to the first radius.

15. The gear tooth of claim 9, wherein said first flank surface extends substantially radially from said annular base and said addendum surface extends substantially axially from said second surface.

16. A method of manufacturing a ring gear comprising at least one gear tooth having a chamfered surface, the method comprising the steps of:

providing the ring gear having an annular base from which the at least one gear tooth extends substantially radially, the at least one gear tooth including a first flank surface extending substantially radially from the annular base and a crest surface extending in a substantially axial direction;

determining a gear module m of the ring gear; and

chamfering the at least one gear tooth such that a first chamfer surface is formed between the first flank surface and the crest surface, and the first chamfer surface comprises a first arcuate surface having a radius R having a length in a range of values greater than or equal to 0.1m and less than or equal to 0.15 m.

17. The method of claim 16, wherein the step of chamfering the at least one gear tooth further comprises:

the first chamfer surface is formed such that the first flank surface is tangent to the first arcuate surface at a tangent point.

18. The method of claim 17, wherein the step of chamfering the at least one gear tooth further comprises:

the first chamfer surface is formed with a distance P measured between the tangent point and a line perpendicular to a plane coplanar with the addendum surface, the distance P being within a range of values of greater than or equal to 0.1m and less than or equal to 0.15 m.

19. The method of claim 16, further comprising the steps of:

providing a pinion gear configured for use with the ring gear; and

the radius R is selected from a range of values ≧ 0.1m and ≦ 0.15m such that the ring gear is configured to mesh with the pinion gear.

20. The method of claim 18, further comprising the steps of:

providing a pinion gear configured for use with the ring gear; and

the distance P is selected from a range of values ≧ 0.1m and ≦ 0.15m such that the ring gear is configured to mesh with the pinion gear.

Technical Field

The present invention relates to an improved gear tooth for a ring gear (i.e., a rotating gear) and a method of making the same. More specifically, the gear tooth includes a chamfered or beveled surface having an arcuate surface adjacent a side or flank surface of the gear tooth and an angular edge between the crest surface and the chamfered surface of the gear tooth. These features of the chamfered surface allow the ring gear to mesh with and rotate with the pinion gear with reduced and/or little damage to the gear teeth of the pinion gear.

Background

Conventional gear teeth of a ring gear have chamfered surfaces with an angular edge between a flank surface of the gear tooth and a crest surface of the gear tooth. As shown in fig. 1, the chamfered surfaces 1, 2 on the gear teeth 6 of the ring gear 4 cause wear damage 3 to the pinion gear 5. The damage 3 may occur at a position where the corner edge 1a of the chamfered surface 1 hits the pinion 5 during rotation of the gear 4.

Disclosure of Invention

The present invention eliminates the negative problems associated with the corner edges of the chamfered surfaces of the gear teeth. More specifically, a preferred embodiment of the present invention includes a chamfer surface on a gear tooth having an arcuate surface adjacent a flank surface of the gear tooth and an angular edge at the boundary of the chamfer surface and a crest surface of the gear tooth. As a result, the ring gear can mesh with and rotate with the pinion gear without causing damage to the pinion gear teeth and/or with relatively little damage.

One embodiment of the present invention is a bearing, comprising: a bearing ring comprising an annular base and a gear module m; a plurality of gear teeth connected to the annular base and positioned circumferentially around the annular base; and each gear tooth of the plurality of gear teeth includes a first flank surface extending from the annular base, a crest surface extending from the first flank surface, and a second surface located between the crest surface and the first flank surface, the second surface including a first arcuate surface having a first radius, the first radius being greater than or equal to 0.1m and less than or equal to 0.15 m. Additionally, the bearing may include a first flank surface tangent to the first arcuate surface and defining a tangent point.

In another aspect of the invention, the length P extends between the tangent point and an outer line coplanar with the tooth crest surface, and the length P is greater than or equal to 0.1m and less than or equal to 0.15 m. In addition, the length P measured perpendicular to the outer line to the tangent point may be 0.1m or more and 0.15m or less.

In another aspect of the present invention, each gear tooth of the plurality of gear teeth further comprises: a corner edge between the second surface and the tooth crest surface; and the first arcuate surface of the second surface abuts the first flank surface. Further, there may be an angle of approximately 135 degrees between the second surface and the tooth crest surface. Additionally, each gear tooth of the plurality of gear teeth may include a third surface located between the second surface and the crest surface, and the third surface is substantially (/ substantially) (substentially) linear.

Another aspect of the present disclosure may include a second flank surface extending from the annular base and a fourth surface located between the second flank surface and the addendum surface, wherein the fourth surface includes a second arcuate portion having a second radius substantially (/ substantially/approximately) equal to the first radius.

Additionally, the first flank surface may extend in a substantially (/ substantially) radial direction from the annular base and the addendum surface may extend in a substantially (/ substantially) axial direction.

Another embodiment of the invention is a gear tooth for a bearing comprising an annular ring having an annular base and a gear module m. The gear teeth include: a first flank surface contiguous with and extending from the annular base; a second surface contiguous with and extending from the first flank surface; a first arcuate surface formed in the second surface and the first flank surface tangent to the first arcuate surface at a tangent point; a tooth top surface contiguous with and extending from the second surface; and a length P extending from the tangent point to a line coplanar with the tooth crest surface, the length P being greater than or equal to 0.1m and less than or equal to 0.15 m. In addition, the length P measured perpendicular to the outer line to the tangent point may be 0.1m or more and 0.15m or less.

In other aspects of the present invention, the first arcuate surface includes a first radius R that is greater than or equal to 0.1m and less than or equal to 0.15 m. Further, the tooth top surface and the second surface abut and form an angular edge. Further, the present invention may include an angle of approximately 135 degrees between the second surface and the tooth tip surface.

In another aspect of the present invention, the gear teeth may further include: a second flank surface extending from the annular base; a third surface abutting the second flank surface and the crest surface; and a second arcuate surface formed in the third surface. Further, the second arcuate surface may include a second radius substantially equal to the first radius.

In yet another aspect of the present invention, the first flank surface extends substantially radially from the annular base and the crest surface extends substantially axially from the second surface.

Another embodiment of the present invention is a method of manufacturing a ring gear including at least one gear tooth having a chamfered surface. The method comprises the following steps: providing a ring gear having an annular base from which the at least one gear tooth extends substantially radially (/ radially), the at least one gear tooth including a first flank surface extending substantially radially from the annular base and a crest surface extending in a substantially axial direction; determining a gear module m of the ring gear; and chamfering the at least one gear tooth such that a first chamfer surface is formed between the first flank surface and the crest surface, and the first chamfer surface comprises a first arcuate surface having a radius R, the radius R having a length in a range of values greater than or equal to 0.1m and less than or equal to 0.15 m.

The chamfering the at least one gear tooth may further comprise: the first chamfer surface is formed such that the first flank surface is tangent to the first arcuate surface at the tangent point. Further, the chamfering the at least one gear tooth may further include: the first chamfer surface is formed with a distance P measured between the tangent point and a line perpendicular to a plane coplanar with the addendum surface, the distance P being within a range of values of 0.1m or more and 0.15m or less.

Another aspect of the invention comprises the steps of: providing a pinion gear configured for use with a ring gear; and selecting the radius R from a range of values ≧ 0.1m and ≦ 0.15m such that the ring gear is configured to mesh with the pinion gear.

Another aspect of the invention comprises the steps of: providing a pinion gear configured for use with a ring gear; and selecting the distance P from a range of values ≧ 0.1m and ≦ 0.15m such that the ring gear is configured to mesh with the pinion gear.

Drawings

The foregoing summary, as well as the detailed description of the preferred embodiments of the present invention, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there is shown in the drawings, which are diagrammatic, embodiments that are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown. In the drawings:

FIG. 1 is an exemplary illustration of a prior art gear tooth meshing with a pinion gear;

FIG. 2 depicts an annular bearing according to a preferred embodiment of the present invention;

FIG. 3 depicts an exploded view of the gear teeth of the ring bearing according to a preferred embodiment of the present invention;

FIG. 4 depicts a gear tooth profile and/or cross-sectional view of the gear teeth of FIG. 3;

FIG. 5A depicts an exploded view of the chamfered surface shown in FIG. 4;

FIG. 5B depicts an exploded view of an alternative embodiment of the chamfered surface shown in FIG. 4;

FIG. 6 depicts the interaction between the ring bearing and the pinion gear in a preferred embodiment of the present invention; and

FIG. 7 is a flowchart of the steps for manufacturing a ring gear according to a preferred embodiment of the present invention.

Detailed Description

Certain terminology is used in the following description for convenience only and is not limiting. The words "inner", "inwardly" and "outer", "outwardly" refer to directions toward and away from, respectively, a designated centerline or geometric center of the described element, with the particular meaning being apparent from the context of the description. Further, as used herein, the terms "connected" and "coupled" are intended to include integrally formed components, direct connections between two different components (without any other components intervening therebetween), and indirect connections between components (with one or more other components intervening therebetween). The terminology includes the words above specifically mentioned, derivatives thereof and words of similar import.

Referring now in detail to the drawings, wherein like reference numerals are used to refer to like elements throughout, there is shown in fig. 2 a preferred embodiment of an annular bearing 10, such as a slew bearing. In this embodiment, the bearing 10 basically includes an annular ring 14 surrounding a central opening or bore 15 and a central axis C. Annular ring 14 also includes an annular base 12 and radially outwardly extending gear teeth 20 separated by a region 25 of annular base 12. The gear teeth have chamfered surfaces 26 and 27.

In this embodiment, gear teeth 20 are integrally formed with annular base 12. It is also contemplated that gear teeth 20 may be connected to annular base 12 by other methods such as welding. Additionally, other configurations of the positioning of gear teeth 20 relative to central axis C are contemplated. For example, gear teeth 20 may extend in an axial direction or in both an axial and radial direction. Further, gear teeth 20 may extend radially inward as shown in FIG. 3, rather than radially outward as shown in FIG. 2.

Fig. 3 depicts an exploded view of gear teeth 20. As shown, the chamfer surfaces 26 and 27, the flank surface (side land surface)28, and the crest surface (top land surface)38 extend substantially the entire width of the gear 10. FIG. 4 depicts a cross-sectional view or gear tooth 20 profile in accordance with a preferred embodiment of the present invention. Each gear tooth 20 has two flank surfaces 28 forming flanks of the gear tooth and extending radially outwardly from the annular base 12 toward the crest surface 38. The crest surface 38 is a surface that extends substantially in the axial direction on the tips of the gear teeth 20 and between the two flank surfaces 28. The tooth top surface 38 may extend in a direction substantially perpendicular to both the axial and radial directions. Although the addendum surface 38 is shown as a generally planar surface, it can have other configurations, such as curved surfaces or areas. As shown in fig. 4, the flank surfaces 28 are formed contiguous with the annular base and chamfer surfaces 26, 27. Additionally, the tooth crest surface 38 is formed contiguous with the chamfer surfaces 26, 27.

Chamfer or inclined surfaces 26, 27 extend between each flank surface 28 and the crest surface 38, and chamfer surfaces 26, 27 are formed differently near the crest surface 38 and the flank surface 28. More specifically, the chamfer surfaces 26, 27 have arcuate or rounded surfaces 30, 32 adjacent the flank surface 28 and abutting the flank surface 28. On the other hand, the connection between each of the chamfer surfaces 26, 27 and either end of the tooth top surface 38 is angular and forms edges 34, 36. Fig. 4 also shows the pitch circle 24 of the gear with a dashed line extending through the middle of the gear teeth 20.

Dashed circle 39 in FIG. 4 represents the area of gear tooth 20 that includes chamfered surface 26. Fig. 5A is an enlarged view of an area within a dotted circle 39, and even though the circle 39 is shown to surround the chamfer surface 26, the chamfer surface 27 is similarly formed. As shown, the arcuate surface 30 has a radius R and is a circumferential portion or arc of a circle 45 (shown by the dashed circle 45 having the radius R). The chamfer surface 26 may have a generally linear surface 49 between the arcuate surface 30 and the crest surface 38. The edge 34 is formed at the intersection of the linear surface 49 and the tooth crest surface 38 such that the linear surface 49 of the chamfer surface 26 extends radially inward from the outer line and the tooth crest surface 38 at an angle 48 of approximately 45 degrees, and there is an angle 51 of approximately 135 degrees between the linear surface 49 and the tooth crest surface 38.

The arcuate surface 30 and the flank surface 28 are contiguous and formed such that the flank surface 28 is tangent to the arcuate surface 30. The arcuate surface 30 and the flank surface 28 both meet at a tangent point 40.

In addition to the circle 45 indicated by the dashed line, fig. 5A also includes a dashed outer line 42 and a boundary line 43 separated by a length or distance P extending in the radial direction. The outer line 42 extends in an axial direction relative to the axis C and is coplanar with the tooth tip surface 38. Borderline 43 extends in an axial direction relative to axis C, is substantially parallel to outer line 42 and intersects flank surface 28 at tangent point 40 of arcuate surface 30 and flank surface 28. The length or distance P represents the distance between the tangent point and the tooth top surface, and P is measured from a point on tangent point or boundary line 43 to a point on outer line 42 such that P is substantially perpendicular to the outer line.

Fig. 5B depicts an alternative embodiment of an enlarged view of the area within the dashed circle 39. As shown, the surface 26 may be formed without the linear surface 49, and the arcuate surface 30 may be directly connected to the addendum surface 38 and the flank surface 28. In this embodiment, the boundary 34 between the arcuate surface 30 and the tooth crest surface may be generally circular, rather than angular.

To form the chamfer surfaces 26, 27, the distance P and the radius R are determined relative to the gear module m of the bearing. As is known in the art, the gear module m of the ring bearing is equal to the ratio of the pitch circle diameter d to the number of gear teeth n. The range of values for the distance P and radius R is calculated to be equal to or greater than 0.1 times the gear module m and less than or equal to 0.15 times the gear module m. In other words,

0.1m≤P≤0.15m；

and

0.1m≤R≤0.15m。

although various values of P and R may be selected from the calculated range, in the preferred embodiment, specific values of P and R are selected from the calculated range so that optimal meshing of the bearing 10 and the pinion 5 may be achieved. One method of selecting these values includes using ISO formulas.

As shown in fig. 6, when the gear teeth 20 are formed with the exemplary profiles shown in fig. 3 and 4, the bearing 10 may be engaged with the pinion gear 5 without damaging the pinion gear 5. More specifically, the use of the arcuate surface 30 having the radius R and the chamfered surfaces 26, 27 having the radial length P prevents damage to the pinion gear 5.

The bearing 10 and the ring tooth 20 may be made, in whole or in part, of various materials such as metals, metal compounds and/or alloys, plastics, natural and/or synthetic polymers, wood, ceramics, and the like.

FIG. 7 depicts one embodiment of a method of manufacturing a bearing 10 according to the present invention. First, in step 200, an annular bearing 10 (such as a slew bearing made of a metal compound) having outwardly and substantially radially extending gear teeth 20 is provided. A pinion 5 configured for use with the bearing 10 may also be provided in step 200. Next, in step 210, the gear module m of the bearing 10 is determined by measuring the pitch circle diameter d, counting the number of gear teeth n, and dividing the pitch circle diameter d by the number of gear teeth n.

In step 220, an acceptable range of values for the length of the radius R of the arcuate surface 30 is calculated using the gear module m, such that R is greater than or equal to 0.1m and R is less than or equal to 0.15 m. In step 230, an acceptable range of values for the length of P is also calculated using the gear module m, such that P is greater than or equal to 0.1m and P is less than or equal to 0.15 m.

In step 240, values for the lengths of R and P are selected from the range of values calculated in steps 220 and 230. The specific values of R and P are chosen such that an optimal meshing of the bearing 10 with the pinion 5 can be achieved. ISO standards may be used in selecting the values of R and P.

In step 250, the chamfered surfaces 26, 27 are created in the gear teeth 20 of the ring bearing 10 provided in step 200. This may be performed using various machining techniques such as grinding, milling, CNC and deburring. The chamfer surfaces 26, 27 are formed with arcuate surfaces 30, 32 adjacent to the flank surface 28 and contiguous with the flank surface 28, and the flank surface 28 is formed tangent to the arcuate surfaces 30, 32, forming a tangent point 40. Additionally, the arcuate surfaces 30, 32 are formed such that they have a radius R of the length selected in step 240.

Further, chamfer surfaces 26, 27 are formed such that each surface has a length P in the radial direction determined in step 240, measured perpendicular to outer line 42 and extending to tangent point 40. A linear surface 49 may exist between the arcuate surfaces 30, 32 and the addendum surface 38 and the linear surface 49 abuts the arcuate surfaces 30, 32 and the addendum surface 38. Additionally, the angular edges 34, 36 are formed where the linear surfaces 49 of the chamfer surfaces 26, 27 abut the tooth crest surface 38, the chamfer surfaces (specifically, the linear surfaces 49) extending at an angle of 45 degrees from the tooth crest surface 38.

Alternatively, step 250 may include forming the chamfer surfaces 26, 27 as shown in fig. 5B with the radiused surface 30 adjacent the flank surface 28 and the crest surface 38 and extending between the flank surface 28 and the crest surface 38. In this embodiment, there may be no angular edges 34, 36 between the tooth top surface 38 and the chamfer surfaces 26, 27.

While the preferred embodiment of manufacturing ring gear 10 as described above includes machining gear teeth 20 to form the necessary chamfered surfaces 26, 27, ring gear 10 with gear teeth 20 may be manufactured using other processes such as molding, casting, extrusion, and powder metallurgy.

It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as generally defined in the appended claims.