CN210830371U - Short cup type harmonic flexible gear structure - Google Patents
Short cup type harmonic flexible gear structure Download PDFInfo
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- CN210830371U CN210830371U CN201921647089.5U CN201921647089U CN210830371U CN 210830371 U CN210830371 U CN 210830371U CN 201921647089 U CN201921647089 U CN 201921647089U CN 210830371 U CN210830371 U CN 210830371U
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Abstract
The utility model discloses a short cup type harmonic flexible gear structure, which comprises a cup bottom (1), wherein the cup bottom (1) is provided with a connecting flange (2), the cup bottom (1) is connected with a cup cylinder (4) through an N-shaped ring (3), and the outer wall of the cylinder opening of the cup cylinder (4) is provided with a conical gear (5); the ratio of the axial height (L) of the short cup type harmonic flexible gear to the inner diameter (D) of the cup cylinder is less than 1. The utility model discloses a short cup type harmonic flexible gear, the bottom of cup adopts N shape ring to be connected with a glass section of thick bamboo, reduces the volume of harmonic flexible gear under the same condition of bearing capacity, improves its bearing capacity under the same condition of harmonic flexible gear volume, prolongs its life along with bearing capacity's improvement to overcome prior art not enough.
Description
Technical Field
The utility model relates to a short cup type harmonic flexible gear structure belongs to harmonic gear drive technical field.
Background
The harmonic reducer is one of three core parts of a servo motor, a reducer and a controller in an industrial robot, and the harmonic flexible gear is the most core and key part in the harmonic reducer. Firstly, the volume of the harmonic reducer is directly determined by the structural form and the size of the harmonic flexible gear; secondly, in the harmonic gear transmission, the harmonic flexible gear works under the state of repeated elastic deformation, and is not only influenced by the bending stress caused by the deformation of the wave generator, but also influenced by the gear meshing force bending moment, so that the harmonic flexible gear is the part with the lowest strength in the harmonic speed reducer. Therefore, the volume, the bearing capacity and the service life of the harmonic reducer are mainly determined by the volume, the bearing capacity and the service life of the harmonic flexible gear.
The existing harmonic flexible gear mainly has two structural forms of a thin-wall straight cylinder type and a thin-wall cup type. Under the condition that the gear parameters, the cup diameter and the axial size are the same, the bearing capacity and the service life of the thin-wall cup-shaped harmonic flexible gear are higher than those of a thin-wall straight-tube harmonic flexible gear, so that the thin-wall cup-shaped harmonic flexible gear is frequently used in an industrial robot harmonic reducer requiring higher bearing capacity and longer service life.
In the aspect of gears, the conventional harmonic flexible gear is a cylindrical gear regardless of adopting an involute tooth form or a double-circular-arc tooth form, namely a gear tooth pitch circle line is parallel to a rotary central axis of the harmonic flexible gear; from the aspect of cup-shaped structure, the cup bottom is flat. The main disadvantage is that the problems of large volume, small bearing capacity and short service life still exist. Therefore, the prior art has shortcomings and needs to be further improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a short cup type harmonic flexible gear structure to reduce the volume of harmonic flexible gear under the same condition of bearing capacity, and improve its bearing capacity under the same condition of harmonic flexible gear volume, make along with its life is prolonged in the improvement of bearing capacity, thereby overcome prior art's not enough.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a short cup type harmonic flexible gear structure, including the bottom of cup, the bottom of cup is equipped with flange, and the bottom of cup is connected with a cup section of thick bamboo through N shape ring, and the nozzle outer wall of a cup section of thick bamboo is equipped with conical gear.
In the above structure, the ratio of the axial height L of the short cup type harmonic flexspline to the inner diameter D of the cup cylinder is less than 1.
In the structure, an included angle β is formed between a gear tooth pitch circle line of the conical gear and a rotary central axis of the harmonic flexible gear, and the included angle β is the same as a deformation inclination angle of the flexible gear in the long axis direction after the short cup type harmonic flexible gear is provided with the wave generator.
In the structure, the conical gear has the same gear tooth thickness on different sections perpendicular to the pitch circle of the gear.
In the above structure, the wall thickness of the N-shaped ring is the same as the wall thickness of the cup bottom and the cup cylinder.
In the structure, the N-shaped ring extends into the cup from the cup bottom.
By adopting the technical scheme, compared with the prior art, the utility model discloses a short cup type harmonic flexible gear among the prior art, no matter adopt involute profile of tooth or double-circular-arc profile of tooth, its gear is cylindrical gear, after wave generator packs into the flexible gear, the flexible gear can produce an abduction deformation inclination in major axis direction, cause the teeth of a cogwheel to produce different deflection along different cross-sections of axial, therefore, flexible gear and rigid gear have kept good meshing state in a certain cross-section, but can produce meshing interference or not meshing phenomenon along the remaining cross-section of axial, lead to the area of contact between the teeth of a cogwheel of flexible gear and the teeth of rigid gear to reduce, the flexbile gear stress increases sharply, bearing capacity and life are greatly reduced, the utility model discloses owing to adopt conical gear, the size that wheel pitch circle line and harmonic flexible gear central axis revolve to become an contained angle β value just the same with the deformation inclination of the long axis direction of the flexible gear after wave generator installation, and on the different cross-sections perpendicular to the teeth of a cogwheel, the teeth thickness of the teeth of a cogwheel is totally the same as, and the flexible gear becomes cylindrical gear under the effect that the flexible gear is packed into the effect of deformation inclination, the cup type gear, the cup wheel, the cup type harmonic gear and the cup shape of the cup wheel, the cup shape of the cup, the cup can be more the bearing capacity of the cup, the cup shape of cup, the cup shape of cup, the cup can be more than the cup, the cup shape of cup, the cup can be more than the cup, the.
Drawings
FIG. 1 is a schematic structural view of the short cup type harmonic flexspline of the present invention;
fig. 2 is an isometric view of fig. 1.
The labels in the figures are: 1-cup bottom, 2-connecting flange, 3-N-shaped ring, 4-cup cylinder and 5-conical gear.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model discloses a what improve short cup type harmonic flexible gear load-carrying capacity constitutes according to following, as shown in fig. 1 and fig. 2, this method is that design the gear on the short cup type harmonic flexible gear into conical gear, conical gear's wheel pitch circle line forms contained angle β with harmonic flexible gear centre of rotation axis, and make contained angle β and short cup type harmonic flexible gear install the flexible gear major axis direction behind the wave generator the deformation inclination the same, can be used for offsetting the outer tension deformation inclination that produces after the wave generator packs into short cup type harmonic flexible gear like this, make conical gear on the flexible gear become cylindrical gear, make the flexible gear teeth and rigid gear teeth all can keep good meshing state in all cross-sections of axial, thereby improve short cup type harmonic flexible gear's bearing capacity, prolong short cup type harmonic flexible gear's life.
The utility model discloses a short cup type harmonic flexible gear structure that constitutes according to above-mentioned method, as shown in fig. 1 and fig. 2, this structure includes the bottom of cup 1, bottom of cup 1 is equipped with flange 2, bottom of cup 1 is connected with a cup section of thick bamboo 4 through N ring 3, the nozzle outer wall of a cup section of thick bamboo 4 is equipped with conical gear 5. the ratio of axial height L of short cup type harmonic flexible gear and cup section of thick bamboo internal diameter D is less than 1. form contained angle β between the teeth of a cogwheel pitch circle line of conical gear 5 and the harmonic flexible gear gyration central axis, contained angle β is the same with the deformation inclination of wave generator installation back flexible gear major axis direction, conical gear 5 is on the different cross-sections perpendicular to the teeth of a cogwheel pitch circle, teeth tooth thickness is the same, N ring 3 wall thickness is the same with the bottom of a cup, cup section of a cup is inwards.
Examples
The short cup type harmonic flexible gear of the embodiment adopts involute tooth form or double-circular-arc tooth form from the aspect of gear, the gear is a conical gear, the cup bottom and the cup cylinder are connected by adopting an N-shaped ring from the aspect of cup type structure, the size of an included angle β formed by a gear pitch circle line and the rotary central axis of the harmonic flexible gear in the short cup type harmonic flexible gear is the same as the deformation inclination angle of the flexible gear in the long axis direction after the wave generator is installed, the gear tooth thickness is completely the same on different sections vertical to the gear pitch circle, the wall thickness of the N-shaped ring is the same as that of the cup bottom and the cup cylinder, and the N-shaped ring is deep into the cup from the cup bottom.
The utility model discloses a short cup type harmonic flexible gear, the bottom of cup adopts N shape ring to be connected with a glass section of thick bamboo, reduces the volume of harmonic flexible gear under the same condition of bearing capacity, improves its bearing capacity under the same condition of harmonic flexible gear volume, prolongs its life along with bearing capacity's improvement to overcome prior art not enough.
Claims (6)
1. The utility model provides a short cup type harmonic flexbile gear structure, includes bottom of cup (1), its characterized in that: the cup bottom (1) is provided with a connecting flange (2), the cup bottom (1) is connected with a cup cylinder (4) through an N-shaped ring (3), and the outer wall of the cylinder opening of the cup cylinder (4) is provided with a conical gear (5).
2. The short cup type harmonic flexspline structure of claim 1, wherein: the ratio of the axial height (L) of the short cup type harmonic flexible gear to the inner diameter (D) of the cup cylinder is less than 1.
3. The short-cup type harmonic flexible gear structure according to claim 1, wherein an included angle (β) is formed between a gear tooth pitch circle line of the conical gear (5) and a rotation central axis of the harmonic flexible gear, and the included angle (β) is the same as a deformation inclination angle of the short-cup type harmonic flexible gear in the long axis direction of the flexible gear after the wave generator is installed on the short-cup type harmonic flexible gear.
4. The short cup type harmonic flexspline structure of claim 1, wherein: the conical gear (5) has the same gear tooth thickness on different sections vertical to the pitch circle of the gear.
5. The short cup type harmonic flexspline structure of claim 1, wherein: the wall thickness of the N-shaped ring (3) is the same as that of the cup bottom and the cup barrel.
6. The short cup type harmonic flexspline structure of claim 1, wherein: the N-shaped ring (3) extends into the cup from the cup bottom (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647089.5U CN210830371U (en) | 2019-09-27 | 2019-09-27 | Short cup type harmonic flexible gear structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647089.5U CN210830371U (en) | 2019-09-27 | 2019-09-27 | Short cup type harmonic flexible gear structure |
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| Publication Number | Publication Date |
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| CN210830371U true CN210830371U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921647089.5U Active CN210830371U (en) | 2019-09-27 | 2019-09-27 | Short cup type harmonic flexible gear structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645336A (en) * | 2019-09-27 | 2020-01-03 | 贵州群建精密机械有限公司 | Method and structure for improving bearing capacity of short cup type harmonic flexible gear |
| CN113268831A (en) * | 2021-06-03 | 2021-08-17 | 重庆大学 | Analysis method for obtaining transmission stress of harmonic gear |
-
2019
- 2019-09-27 CN CN201921647089.5U patent/CN210830371U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645336A (en) * | 2019-09-27 | 2020-01-03 | 贵州群建精密机械有限公司 | Method and structure for improving bearing capacity of short cup type harmonic flexible gear |
| CN113268831A (en) * | 2021-06-03 | 2021-08-17 | 重庆大学 | Analysis method for obtaining transmission stress of harmonic gear |
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