CN211599462U - Shape-modifying gear and harmonic reducer - Google Patents
Shape-modifying gear and harmonic reducer Download PDFInfo
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- CN211599462U CN211599462U CN201922386941.4U CN201922386941U CN211599462U CN 211599462 U CN211599462 U CN 211599462U CN 201922386941 U CN201922386941 U CN 201922386941U CN 211599462 U CN211599462 U CN 211599462U
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 11
- 230000007423 decrease Effects 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The utility model relates to a shape-modifying gear, which comprises a cylinder body, wherein the cylinder body is provided with an opening end and a closed end; the outside of open end is equipped with a plurality of outside teeth along the circumference, follows the open end to the direction of closed end, every outside tooth has first tooth section and second tooth section, and the distance of the axis of the top of second tooth section apart from the barrel reduces gradually. The utility model also relates to a harmonic reducer, which comprises the shape-modifying gear, wherein the shape-modifying gear is arranged in the inner cavity, and the external teeth are meshed with the internal teeth; the rigid wheel is provided with an inner cavity, and the cavity wall of the inner cavity is provided with inner teeth; the wave generator is connected in the cylinder. The utility model discloses can increase with the flank of tooth contact length of rigid wheel internal tooth to the effort that the dispersion flank of tooth bore realizes reducing flank of tooth wearing and tearing, improves the stationarity of operation, the purpose of noise when reducing the operation.
Description
Technical Field
The utility model belongs to the technical field of the harmonic reduction gear and specifically relates to a shape gear and harmonic reduction gear are repaiied.
Background
In the harmonic gear reducer, the tooth shapes of a flexible gear and a rigid gear directly influence the performance such as the precision service life of the harmonic reducer. In the related art, the tooth profiles of the flexible gear and the rigid gear are straight tooth involute type or double circular arc type, and both the tooth profile of the flexible gear and the tooth profile of the rigid gear are uniform-section tooth profiles, as shown in fig. 1 and 2. After the wave generator is installed in the interior of one end (for example, the right end in fig. 1) of the flexible gear, the right end is expanded and deformed due to the abutting of the wave generator, and the farther away from the right end, the smaller the deformation of the flexible gear is, namely, the flexible gear is integrally of a conical structure with the small left end and the large right end, so that the farther away from the right end is caused, the smaller the meshing area of the flexible gear and the teeth on the steel gear is, part of the teeth can bear larger acting force due to the meshing mode, the teeth are easily abraded, in addition, the insufficient meshing area can also influence the running stability, and the noise in running is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve one of the technical problem in the correlation technique at least to a certain extent. To this end, it is an object of an embodiment of the present invention to provide a modified gear capable of increasing a tooth surface contact area of a rigid gear and a flexible gear.
The embodiment of the utility model provides an adopted technical scheme is:
in a first aspect, a modified gear is provided, comprising a barrel having an open end and a closed end; the outside of open end is equipped with a plurality of outside teeth along the circumference, along the direction of open end to closed end, every outside tooth has first tooth section and second tooth section, and the distance of the axis of the top of second tooth section apart from the barrel reduces gradually.
The utility model has the advantages that:
the shape-modifying gear can increase the contact length of the tooth surface of the internal tooth of the rigid gear, so that the acting force borne by the tooth surface can be dispersed, and the purposes of reducing the tooth surface abrasion, improving the running stability and reducing the running noise are achieved.
In some embodiments of the invention, the distance of the top of the first tooth segment from the central axis remains constant.
In some embodiments of the utility model, the barrel is cylindrical barrel, and along the direction of open end to closed end, the distance of the inside wall of top to the barrel of second tooth section reduces gradually.
In some embodiments of the present invention, the tooth height of the first tooth segment remains constant.
In some embodiments of the present invention, the included angle α between the contour line of the top of the second tooth segment and the central axis is 0.01 to 0.05 times the pressure angle of the tooth profile.
In some embodiments of the invention, the length of the second tooth segment is 0.2 to 0.4 times the length of the outer tooth.
In a second aspect, the present invention further provides a harmonic reducer, including the above-mentioned shaping gear, wherein the shaping gear is arranged in the inner cavity, and the external teeth are engaged with the internal teeth; the rigid wheel is provided with an inner cavity, and the cavity wall of the inner cavity is provided with inner teeth; the wave generator is connected in the cylinder.
Drawings
Fig. 1 is a sectional view of a flexspline in the related art.
Fig. 2 is an enlarged view of the region I in fig. 1.
Fig. 3 is a cross-sectional view of an embodiment of the present invention.
Fig. 4 is an enlarged view of region II in fig. 3.
Fig. 5 is a schematic view of an embodiment of the present invention in use engaged.
Fig. 6 is an enlarged view of the region III in fig. 5.
Detailed Description
This part will describe the embodiment of the present invention in detail, and the embodiment of the present invention is shown in the attached drawings, and the function of the attached drawings is to supplement the description of the text part of the specification with figures, so that each technical feature and the whole technical solution of the embodiment of the present invention can be understood visually and vividly, but it cannot be understood as the limitation to the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," or "connected" to another feature, it can be directly disposed, secured, or connected to the other feature or be indirectly disposed, secured, or connected to the other feature.
In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
In addition, unless defined otherwise, technical and scientific terms used in the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 3, a schematic cross-sectional view of one embodiment of the present invention is shown. In this embodiment, the barrel 1 of the modified gear is cup-shaped, and in other embodiments, the barrel 1 of the modified gear is top-hat-shaped. Wherein one end (e.g., the right end in fig. 3) of the barrel 1 is an open end 10 and the other end (e.g., the left end in fig. 3) is a closed end 20, the term "closed end 20" herein refers to being closed relative to the fully open end 10 and does not mean that the closed end 20 is fully closed, e.g., the closed end 20 in fig. 3 may have a through hole.
Referring to fig. 4, the outer side of the open end 10 of the barrel 1 is circumferentially provided with a plurality of external teeth 2, and each external tooth 2 has a first tooth section 21 and a second tooth section 22 in a direction from the closed end 20 to the open end 10 (for example, from left to right in fig. 3), and the distance from the top of the first tooth section 21 to the central axis of the barrel 1 is kept constant, and the distance from the top of the second tooth section 22 to the central axis of the barrel 1 is gradually reduced and is in a downward slope shape towards the open end. Specifically, in this embodiment, the manner in which the distance of the top of the second tooth section 22 from the central axis of the cylinder 1 gradually decreases is implemented as follows: so that the distance from the top of the second tooth segment 22 to the inner side wall of the cylinder 1 is gradually reduced.
In some embodiments of the present invention, the wall thickness of the cylinder 1 within the range of the second gear section 22 is also gradually reduced in the present embodiment, that is, the outer contour of the cylinder 1 within the range of the second gear section 22 is conical, so as to ensure that the tooth height of the second gear section 22 is constant, and avoid weakening the strength of the second gear section 22.
In some embodiments of the present invention, the angle α between the contour line of the top of the second tooth section 22 and the central axis is 0.01-0.05 times the pressure angle of the tooth profile.
In some embodiments of the present invention, the length of the second tooth section 22 is 0.2 to 0.4 times the length of the outer teeth 2.
In some embodiments of the present invention, a harmonic reducer using the above modified gear as a flexible gear is also disclosed, and the harmonic reducer further includes a wave generator 3 and a rigid gear 4; in the embodiment, the modification gear is arranged in an inner cavity of the rigid wheel 4, inner teeth are arranged on the inner cavity, external teeth 2 on the modification gear can be meshed with the inner teeth of the rigid wheel 4, and a wave generator 3 is arranged in the inner cavity of the modification gear.
In the embodiment, the modified gear is used as a flexible gear of the harmonic reducer, and the inclined second gear section 22 can inhibit the flexible gear from deforming after the wave generator is installed in the flexible gear, so that the contact length of the external teeth 2 of the flexible gear and the tooth surfaces of the internal teeth of the rigid gear can be increased, the stress of the installation position of the wave generator of the flexible gear can be reduced, the starting torque of the harmonic reducer is reduced, and the transmission efficiency is improved; in addition, referring to fig. 5 and 6, since the area of the meshing area is increased, the present embodiment can also disperse the acting force borne by the tooth surface, thereby reducing the abrasion of the tooth surface, improving the running stability, and reducing the running noise.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (7)
1. A modified gear comprising a barrel having an open end and a closed end; the outer side of the opening end is circumferentially provided with a plurality of external teeth, each external tooth is provided with a first tooth section and a second tooth section along the direction from the opening end to the closing end, and the distance from the top of the second tooth section to the central axis of the cylinder body is gradually reduced.
2. The modified gear of claim 1, wherein a distance of a top of the first tooth segment from the central axis remains constant.
3. The modified gear of claim 1, wherein the cylinder is a cylindrical cylinder, and the distance from the top of the second tooth segment to the inner side wall of the cylinder gradually decreases in the direction from the open end to the closed end.
4. The modified gear of claim 3, wherein the tooth height of the second tooth segment remains constant.
5. The modified gear according to claim 1, wherein the contour line of the top of the second tooth segment has an angle α with respect to the central axis which is 0.01 to 0.05 times the magnitude of the pressure angle of the tooth profile.
6. The modified gear of claim 1, wherein the length of the second tooth segment is 0.2 to 0.4 times the length of the outer tooth.
7. A harmonic reducer is characterized by comprising
The rigid wheel is provided with an inner cavity, and inner teeth are arranged on the cavity wall of the inner cavity;
the modified gear of any one of claims 1 to 6, disposed in the internal cavity, the external teeth meshing with the internal teeth;
the wave generator is connected in the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922386941.4U CN211599462U (en) | 2019-12-26 | 2019-12-26 | Shape-modifying gear and harmonic reducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922386941.4U CN211599462U (en) | 2019-12-26 | 2019-12-26 | Shape-modifying gear and harmonic reducer |
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| Publication Number | Publication Date |
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| CN211599462U true CN211599462U (en) | 2020-09-29 |
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| CN201922386941.4U Active CN211599462U (en) | 2019-12-26 | 2019-12-26 | Shape-modifying gear and harmonic reducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939713A (en) * | 2019-12-26 | 2020-03-31 | 深圳市山卓谐波传动科技有限公司 | Shape-modifying gear and harmonic reducer |
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2019
- 2019-12-26 CN CN201922386941.4U patent/CN211599462U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939713A (en) * | 2019-12-26 | 2020-03-31 | 深圳市山卓谐波传动科技有限公司 | Shape-modifying gear and harmonic reducer |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231116 Address after: Room 509-1, Building B, Electronic Information Industry Innovation Park, No. 135 Zhengtong Road, High tech Zone, Zibo City, Shandong Province, 255000 Patentee after: Demei Precision Transmission (Zibo) Co.,Ltd. Address before: 518101 building C, 127 Shangnan East Road, Xinqiao street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SUNJOY HARMONIC TRANSMISSION TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |