CN114278716A - Flexible gear for speed reducer and speed reducer with flexible gear - Google Patents
Flexible gear for speed reducer and speed reducer with flexible gear Download PDFInfo
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- CN114278716A CN114278716A CN202111342409.8A CN202111342409A CN114278716A CN 114278716 A CN114278716 A CN 114278716A CN 202111342409 A CN202111342409 A CN 202111342409A CN 114278716 A CN114278716 A CN 114278716A
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- gear
- speed reducer
- flexible gear
- flexible
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000013011 mating Effects 0.000 claims description 5
- 230000004323 axial length Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a flexible gear for a speed reducer and the speed reducer with the flexible gear, which comprise a flexible gear body, wherein the flexible gear body is provided with a gear ring matched with a steel gear, the end surface of the flexible gear body is provided with a plurality of matching bulges, the matching bulges are used for being in transmission matching with other transmission parts, and the matching bulges transmit rotating torque with the other transmission parts. The flexbile gear is established in the reduction gear, and other driving mediums in the reduction gear not only can realize axial rotation's transmission through the clearance between the card cooperation arch, still can not add the holistic axial length of device, are showing the length that has shortened the reduction gear, and it is protruding only to need to go into the cooperation with this application flexbile gear complex rotation piece simultaneously, and this driving medium size can not be greater than the flexbile gear size, consequently can reduce the axial height dimension demand of reduction gear to reduce the whole size of reduction gear.
Description
Technical Field
The invention relates to the field of gear transmission, in particular to a flexible gear for a speed reducer and the speed reducer with the flexible gear.
Background
The harmonic reducer is widely applied to the scenes of aerospace, semiconductors, robots and the like which require high-precision transmission parts with compact structures, the current harmonic reducer mainly comprises a wave generator, a rigid gear, a flexible gear and other structural parts, wherein the flexible gear is in a cup shape or a short cylinder shape, the cup-shaped flexible gear needs to deform in the radial direction due to the flexible gear, so that the height of the cup-shaped flexible gear is higher and is difficult to shorten, the axial direction is longer, the axial size of the whole harmonic reducer is larger, the shortening of the flexible gear is always the target of pursuing harmonic reduction, and the reducer with larger size is not suitable for the transmission scenes with higher requirements on the radial size.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a flexible gear for a speed reducer and the speed reducer with the flexible gear, so as to solve the technical problem that the conventional flexible gear is long, so that the part with large axial size of the speed reducer has high requirement on the radial size and is inapplicable in a transmission scene.
One of the purposes of the invention is realized by adopting the following technical scheme: the utility model provides a flexbile gear for speed reducer, includes the flexbile gear wheel body, the flexbile gear wheel body be equipped with steel wheel complex ring gear, the terminal surface of flexbile gear wheel body is equipped with a plurality of cooperation archs, the cooperation arch be used for with other driving medium transmission coordination, the rotatory moment of torsion of transmission between cooperation arch and other driving mediums.
Optionally, the flexible gear is in a short cylinder shape, and the end faces of the two sides of the flexible gear body are provided with matching protrusions.
Optionally, the mating protrusion is cylindrical.
Optionally, the side surface of the matching protrusion is an arc surface or a connection extension of multiple arc surfaces.
Optionally, the position of the matching protrusion corresponds to the tooth tip on the gear ring.
Optionally, the end of the mating protrusion is the same shape as the gear teeth on the ring gear.
Optionally, the number of teeth of the gear ring is an integral multiple of the number of the matching protrusions.
Optionally, the matching protrusions are arranged in an even array along the flexible wheel body.
The invention also provides a speed reducer which comprises the steel wheel and other transmission parts.
Optionally, the other transmission members include an output frame, the outer side surface of the output frame is provided with a transmission rib, and the transmission rib is arranged between the adjacent matching protrusions.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the flexible gear is arranged in the speed reducer, and other transmission parts in the speed reducer are clamped into the gaps between the matching bulges, so that the transmission of the rotating torque can be realized, the integral axial length of the device cannot be increased, the length of the speed reducer is obviously shortened, meanwhile, the rotating part matched with the flexible gear can be clamped into the matching bulges, and the size of the transmission part cannot be larger than that of the flexible gear, so that the axial height size requirement of the speed reducer can be reduced, and the integral size of the speed reducer is reduced.
Drawings
FIG. 1 is a schematic view of a flexspline in accordance with some embodiments of the present invention;
FIG. 2 is a schematic view of a flexspline in accordance with certain embodiments of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view of a transmission member engaged with a flexible gear in accordance with certain embodiments of the present invention;
FIG. 5 is a schematic illustration of a retarder configuration according to some embodiments of the present invention;
in the figure:
1. a flexible wheel body; 11. a mating protrusion; 12. a gap; 13. a ring gear; 131. a tooth tip;
2. a steel wheel;
3. other transmission members; 31. an output frame; 311. and (5) a transmission rib.
Detailed Description
The present invention will be further described with reference to fig. 1 to 5 and the detailed description thereof, and it should be noted that, in the case of conflict, any combination of the embodiments or technical features described below may form a new embodiment.
The embodiment of the invention provides a flexible gear for a speed reducer, which comprises a flexible gear body 1, wherein the flexible gear body 1 is provided with an outer gear ring 13 matched with a steel gear 2, if a planet gear is used in the speed reducer, the flexible gear body 1 is also provided with an inner gear ring 13 matched with the planet gear, the end surface of the flexible gear body 1 is provided with a plurality of matching protrusions 11, the matching protrusions 11 are used for being in transmission matching with other transmission parts 3, the matching protrusions 11 and the other transmission parts 3 transmit rotating torque, gaps 12 are arranged between the matching protrusions 11, the other transmission parts 3 are clamped with the gaps 12, so that force is applied in a butting mode during rotation, and the other transmission parts output axial rotating torque taking the center of the steel gear 2 as an axis, so that rotation output is realized. The flexbile gear generally adopts the processing of plastic material to make, the metal flexbile gear is because the rigidity is big, the wall thickness is thin, with this flexbile gear difficult processing, and the plastic can be accomplished very easily by the mould shaping, in the cost-effective time, still have higher elastic modulus, transmission part 3 nevertheless does not influence the harmonic deformation of flexbile gear with clearance 12 joint when rotating, and the thickness of other transmission parts 3 overlaps or partly overlaps with the bellied thickness of flexbile gear, the whole thickness of device diminishes, thereby make the flexbile gear that this disclosure provided under the prerequisite that satisfies the harmonic reduction gear demand, axial length is less than traditional flexbile gear. Therefore, the length and the weight of the harmonic reducer are reduced, and the possibility of meeting the requirements of more equipment is provided.
In some embodiments, the flexible gear is in a short cylindrical shape, and the end surfaces of the two sides of the flexible gear body 1 are respectively provided with a matching protrusion 11, so that the two sides of the flexible gear can be connected with other transmission parts 3, and more transmission requirements can be met.
In some embodiments, as shown in FIG. 1, the mating protrusion 11 is cylindrical. The cylindrical matching bulge 11 is convenient to manufacture and form, is not easy to have errors, can meet the transmission requirement and can save the manufacturing cost.
In some embodiments, as shown in fig. 2 and 3, the side surface of the fitting protrusion 11 is an arc surface or a connection extension of multiple arc surfaces, and is designed to correspond to the side surface of the fitting protrusion 11 according to the shape of other connecting members, the fitting protrusion 11 is shaped, and the contact stress concentration between the connecting member and the fitting protrusion 11 is processed by a convex arc surface, so as to ensure the fatigue between the fitting protrusion 11 and the flexspline body 1.
As a further optimization, the position of the matching protrusion 11 corresponds to the tooth tip 131 on the gear ring 13, and more specifically, the end of the matching protrusion 11 is the same as the gear tooth shape on the gear ring 13, as shown in fig. 1, the axis of each cylindrical matching protrusion 11 and the straight line formed by the corresponding tooth tip 131 are both directed to the center of the flexible gear, as shown in fig. 2, the end of each shaped matching protrusion 11 is the same as the tooth tip 131 on the gear ring 13, and each matching protrusion 11 is disposed between two adjacent tooth tips 131, so that not only the strength of the tooth tip 131 can be enhanced by the matching protrusion 11 when the flexible gear is in transmission matching with the steel gear 2, but also the deformation resistance of the matching protrusion 11 can be ensured by the tooth tip 131, and the matching protrusion 11 and the tooth tip 131 are maintained fatigue with each other, so that the flexible gear still maintains very good precision after long-time transmission.
As an optimization, in some embodiments, the number of the gear teeth of the gear ring 13 is an integral multiple of the number of the matching protrusions 11, specifically, the matching protrusions 11 are uniformly arranged along the flexible gear body 1 in an array, so that the stress on the flexible gear can be uniformly distributed, the transmission is prevented from being affected by stress concentration, the stability of the flexible gear is improved, the fatigue strength of the flexible gear is improved, and the flexible gear has a longer service life.
The invention also provides a reducer comprising a steel wheel 2 and other transmission members 3 as shown in figures 4 and 5. Specifically, the other transmission members 3 include an output frame 31, the output frame 31 is a circular disk, the output frame 31 is provided with transmission ribs 311, the transmission ribs 311 are similar to spoke connection ribs in style, the transmission ribs 311 are arranged between adjacent matching protrusions 11, and the output frame 31 outputs axial rotation torque under the design. Adopt NGWN shape steel wheel 2 output when the flexbile gear, because steel wheel 2 exports with the meshing of flexbile gear wheel body 1, the axial length of steel wheel 2 is greater than the axial length of flexbile gear wheel body 1, the meshing height of output frame 31 is not higher than the protruding height of the protruding 11 of cooperation, consequently, axial length in this device can not be than the axial length of steel wheel 2 and stretch out too much, consequently, output frame 31 adopts spoke splice bar and the protruding 11 cooperation of cooperation, can also bear great moment of torsion when can not increase device axial length.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a flexbile gear for speed reducer, its characterized in that, includes the flexbile gear wheel body, the flexbile gear wheel body be equipped with steel wheel complex ring gear, the terminal surface of flexbile gear wheel body is equipped with a plurality of cooperation archs, the cooperation arch is used for cooperating with other driving medium transmission, and the transmission rotation moment of torsion between cooperation arch and other driving mediums.
2. The flexible gear for the speed reducer of claim 1, wherein the flexible gear is in a short cylindrical shape, and the two side end faces of the flexible gear body are provided with matching protrusions.
3. The flexspline for a speed reducer of claim 1, wherein the engagement projection is cylindrical.
4. The flexible gear for speed reducer of claim 1, wherein the side of the engaging protrusion is a curved surface or a plurality of curved surface connecting extensions.
5. The flexible gear for a speed reducer according to claim 1, wherein the engaging projection is located to correspond to a tooth tip on the ring gear.
6. The flexible gear for speed reducer according to claim 5, wherein the end of the fitting projection is the same shape as the gear teeth on the ring gear.
7. The flexible gear for a speed reducer according to claim 1, wherein the number of teeth of the ring gear is an integral multiple of the number of the fitting projections.
8. The flexspline for a speed reducer of claim 1, wherein the mating projections are arranged in a uniform array along the body of the flexspline.
9. A decelerator including a flexspline for the decelerator as claimed in any one of claims 1 to 8, the decelerator including steel sheaves and other transmission members.
10. A decelerator according to claim 9, wherein the other driving members include an output carrier, and the outer side of the output carrier is provided with a driving rib which is provided between adjacent engagement protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111342409.8A CN114278716A (en) | 2021-11-12 | 2021-11-12 | Flexible gear for speed reducer and speed reducer with flexible gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111342409.8A CN114278716A (en) | 2021-11-12 | 2021-11-12 | Flexible gear for speed reducer and speed reducer with flexible gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114278716A true CN114278716A (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111342409.8A Pending CN114278716A (en) | 2021-11-12 | 2021-11-12 | Flexible gear for speed reducer and speed reducer with flexible gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114278716A (en) |
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2021
- 2021-11-12 CN CN202111342409.8A patent/CN114278716A/en active Pending
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