CN110513463A - A kind of flexbile gear that thickens for harmonic gear transmission - Google Patents
A kind of flexbile gear that thickens for harmonic gear transmission Download PDFInfo
- Publication number
- CN110513463A CN110513463A CN201910926667.7A CN201910926667A CN110513463A CN 110513463 A CN110513463 A CN 110513463A CN 201910926667 A CN201910926667 A CN 201910926667A CN 110513463 A CN110513463 A CN 110513463A
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- gear
- flexbile
- gear teeth
- pitch circle
- flexbile gear
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 230000007812 deficiency Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
- F16H55/0833—Flexible toothed member, e.g. harmonic drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
- F16H2055/0866—Profiles for improving radial engagement of gears, e.g. chamfers on the tips of the teeth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
- F16H55/0886—Profiling with corrections along the width, e.g. flank width crowning for better load distribution
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a kind of flexbile gear that thickens for harmonic gear transmission, including flexbile gear body (1), flexbile gear body is toothed around (2) on (1)；On the different cross section perpendicular to wheel pitch circle, gear teeth transverse tooth thickness is different.When the cam wave generator with flexible bearing be packed into it is of the invention thicken flexbile gear after, flexbile gear is under the influence of the outer deformation angle of inclination beta that major axis of cam direction generates, although the flexbile gear gear teeth and the position of firm gear gear teeth meshing point are changed, but within the scope of facewidth B, transverse tooth thickness of the flexbile gear gear teeth at axial all section internal messing points is still identical, therefore good meshing state can be kept with firm gear, to overcome the deficiencies in the prior art.
Description
Technical field
The present invention relates to a kind of flexbile gears that thickens for harmonic gear transmission, belong to harmonic gear transmission technical field.
Background technique
Harmonic gear transmission is using controlled elasticity deformation wave caused by flexible gear come the one of passing movement or power
Kind gear transmission mode, mainly including three flexbile gear, firm gear and wave producer basic building blocks, its working principle is that: when with soft
Property bearing cam wave generator be packed into flexbile gear after, force thin-walled flexbile gear generate flexible deformation, the tooth at the long axis both ends of cam
It is at a fully engaged with firm gear tooth, and then completely disengaged at the short axle of cam, the long axis in cam and week between the short axle of cam
Tooth in length in different sections, what is had is engaging-in, and some is nibbled out, and when wave producer continuous rotation, wave producer forces flexbile gear to become
Shape is constantly converted, and the tooth of flexbile gear is nibbled out by engaging to turn in succession, is disengaged by nibbling out to turn to, engaging-in by disengaging steering, by engaging-in turn
To engagement, to realize that flexbile gear is rotated relative to firm gear along the opposite direction of wave producer.
Flexbile gear in prior art harmonic gear transmission, the general involute gear or double circles for being less than 0.4mm using modulus
Gear with curved teeth.On the different cross section perpendicular to wheel pitch circle, gear teeth transverse tooth thickness is identical.The shortcomings that prior art: when with soft
Property bearing cam wave generator be packed into flexbile gear after, the deformation angle of inclination beta that flexbile gear can generate outside one in the long axis direction of cam,
The gear teeth are caused to generate different deflections along axially distinct section, therefore, although flexbile gear and firm gear maintain good in a certain section
Good meshing state, but the phenomenon that can generate meshing interference along remaining axial section or not engage leads to the flexbile gear gear teeth and just
The contact area taken turns between the gear teeth reduces, and flexbile gear stress sharply increases, and bearing capacity and service life are greatly lowered.Therefore, existing
Having technology, there is also deficiencies, need to be further improved.
Summary of the invention
The object of the present invention is to provide a kind of flexbile gears that thickens for harmonic gear transmission, when with flexible bearing
After cam wave generator is packed into flexbile gear, flexbile gear is under the action of the outer deformation angle of inclination beta that the long axis direction of cam generates, gear teeth edge
Axially distinct section generates different deflections, and the deformed flexbile gear gear teeth are kept in axial all sections with the firm gear gear teeth
Good meshing state, thus overcome the deficiencies in the prior art.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of flexbile gear that thickens for harmonic gear transmission of the invention, including make for being installed together with wave producer
Flexbile gear body is toothed around on flexbile gear body；On the different cross section perpendicular to wheel pitch circle, gear teeth transverse tooth thickness is different, and
In the gear teeth along facewidth direction, the transverse tooth thickness for taking turns pitch circle is gradually increased, i.e., the small end thickness on pitch circle of gear teeth one end is less than the gear teeth
The big end thickness on pitch circle of the other end.
In the above-mentioned flexbile gear that thickens, within the scope of the facewidth of the gear teeth, the small end thickness on pitch circle and big end pitch circle tooth of the gear teeth
Thick angle δ meets relational expression δ=2arctg (sin β × tg α), and the α in the relational expression is the pressure angle taken turns at pitch circle, β
Flexbile gear is at the outer deformation inclination angle that long axis direction generates after being packed into for wave producer.
By adopting the above-described technical solution, compared with prior art, the present invention when the cam wave with flexible bearing is sent out
The raw device loading present invention thickens after flexbile gear, and flexbile gear is under the influence of the outer deformation angle of inclination beta that major axis of cam direction generates, flexbile gear wheel
Although the position of tooth and firm gear gear teeth meshing point is changed, but within the scope of facewidth B, and the flexbile gear gear teeth are in axial all sections
Transverse tooth thickness at internal messing point is still identical, therefore can keep good meshing state with firm gear, to overcome the prior art not
Foot.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
The label in accompanying drawing is: 1- flexbile gear body, the 2- gear teeth.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
A kind of flexbile gear that thickens for harmonic gear transmission of the invention, as shown in Figure 1, including for being sent out with existing wave
Raw device is installed together the flexbile gear body 1 used, is toothed around 2 on flexbile gear body 1, when production, perpendicular to 2 pitch circle of the gear teeth not
With the transverse tooth thickness difference on section, making the gear teeth 2, and in the gear teeth 2 along the direction facewidth B, increase the transverse tooth thickness for taking turns pitch circle gradually
Greatly, even if the small end thickness on pitch circle Sa1 of the gear teeth 2 is less than the big end thickness on pitch circle Sa2 of the gear teeth 2；It is optimal using effect in order to reach
Fruit when production, within the scope of the facewidth B of the gear teeth 2, makes the folder of the small end thickness on pitch circle Sa1 and big end thickness on pitch circle Sa2 of the gear teeth 2
Angle δ meets relational expression δ=2arctg (sin β × tg α), and the α in the relational expression is the pressure angle at 2 pitch circle of the gear teeth, and β is wave
Entire flexbile gear is at the outer deformation inclination angle that long axis direction generates after generator loading.
Embodiment
The flexbile gear that thickens for harmonic gear transmission of this example either uses involute gear or Novikov gears with double circular arc tooth profiles,
On the different cross section perpendicular to wheel pitch circle, gear teeth transverse tooth thickness is different, within the scope of facewidth B, small tooth thickness on pitch circle and big
The angle δ of end thickness on pitch circle meets δ=2arctg (sin β × tg α) relational expression.
α is the pressure angle taken turns at pitch circle in above-mentioned relation formula, and β is that flexbile gear is generated in long axis direction after wave producer is packed into
Outer deformation inclination angle.
Working principle of the present invention is as follows:
If flexbile gear in harmonic gear transmission using the equal involute gear of thickness on pitch circle in the prior art or
Novikov gears with double circular arc tooth profiles, then, after the cam wave generator with flexible bearing is packed into flexbile gear, since flexbile gear can be produced in long axis direction
The deformation angle of inclination beta opened outside one raw, under the influence of deforming angle of inclination beta, the flexbile gear gear teeth and the position of firm gear gear teeth meshing point can be sent out
Changing, within the scope of facewidth B, meshing point forms a radial height difference Bsin β；When pressure angle at pitch circle is α, then exist
The transverse tooth thickness difference of flexbile gear gear teeth meshing point is 2Bsin β × tg α within the scope of facewidth B, just because of the flexbile gear gear teeth within the scope of facewidth B
Meshing point just makes flexbile gear and firm gear although maintain good meshing state in a certain section there are such a transverse tooth thickness is poor,
But it the phenomenon that generating meshing interference along remaining axial section or not engage, eventually leads between the flexbile gear gear teeth and the firm gear gear teeth
Contact area reduce, flexbile gear stress sharply increases, and bearing capacity and service life are greatly lowered；And thickeing in the present invention is soft
Wheel either uses involute gear or Novikov gears with double circular arc tooth profiles, and on the different cross section perpendicular to wheel pitch circle, gear teeth transverse tooth thickness is not
Together, it since within the scope of facewidth B, the angle of small tooth thickness on pitch circle and big end thickness on pitch circle is δ, is calculated through trigonometric function,
Present invention thickness on pitch circle difference of the flexbile gear within the scope of facewidth B that thicken then is (δ/2) 2Btg, and due to small tooth section in the present invention
The angle δ of knuckle-tooth thickness and big end thickness on pitch circle meets δ=2arctg (sin β × tg α) relational expression, so (δ/2)=arctg
(sin β × tg α), tg (δ/2)=sin β × tg α, 2Btg (δ/2)=2Bsin β × tg α, therefore the present invention thickens, flexbile gear is in facewidth B
Thickness on pitch circle difference in range is exactly equal to 2Bsin β × tg α, therefore, using in the present invention thicken flexbile gear when, when with soft
Property bearing cam wave generator be packed into flexbile gear after, flexbile gear is under the influence of the outer deformation angle of inclination beta that long axis direction generates, flexbile gear
Although the position of the gear teeth and firm gear gear teeth meshing point is changed, but within the scope of facewidth B after, the flexbile gear gear teeth are axially all
Transverse tooth thickness at the internal messing point of section is still identical, therefore can keep good meshing state with firm gear, to overcome the prior art
Deficiency.
Claims (2)
1. a kind of flexbile gear that thickens for harmonic gear transmission, including for being installed together the flexbile gear body used with wave producer
(1), (2) are toothed around on flexbile gear body (1)；It is characterized by: on the different cross section perpendicular to the gear teeth (2) pitch circle, the gear teeth
(2) transverse tooth thickness is different, and in the gear teeth (2) along the direction the facewidth (B), the thickness on pitch circle of the gear teeth (2) is gradually increased, i.e. the gear teeth
(2) small end thickness on pitch circle (Sa1) is less than the gear teeth (2) big end thickness on pitch circle (Sa2).
2. being used for the flexbile gear that thickens of harmonic gear transmission according to claim 1, it is characterised in that: the facewidth in the gear teeth (2)
(B) in range, the small end thickness on pitch circle (Sa1) of the gear teeth and the angle δ of big end thickness on pitch circle (Sa2) meet relational expression δ=
2arctg (sin β × tg α), the α in the relational expression are the pressure angle at the gear teeth (2) pitch circle, and β is soft after wave producer is packed into
Wheel is at the outer deformation inclination angle that long axis direction generates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910926667.7A CN110513463A (en) | 2019-09-27 | 2019-09-27 | A kind of flexbile gear that thickens for harmonic gear transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910926667.7A CN110513463A (en) | 2019-09-27 | 2019-09-27 | A kind of flexbile gear that thickens for harmonic gear transmission |
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| Publication Number | Publication Date |
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| CN110513463A true CN110513463A (en) | 2019-11-29 |
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| CN201910926667.7A Pending CN110513463A (en) | 2019-09-27 | 2019-09-27 | A kind of flexbile gear that thickens for harmonic gear transmission |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243565A (en) * | 1987-03-30 | 1988-10-11 | Agency Of Ind Science & Technol | Gear unit for acceleration/deceleration driving device |
| JP2004125054A (en) * | 2002-10-02 | 2004-04-22 | Toyota Motor Corp | Forging gear, method of manufacturing the same, and mould for forging gear |
| CN102374273A (en) * | 2010-08-18 | 2012-03-14 | 李宁 | Tooth profile design of dual-pressure angle involute helical tooth externally-meshed cylindrical gear |
| CN103615501A (en) * | 2013-11-06 | 2014-03-05 | 中国航天科技集团公司第九研究院第七七一研究所 | Small harmonic reducer and optimum design method thereof |
| CN104625664A (en) * | 2014-12-24 | 2015-05-20 | 厦门大学 | Numerical control machining method for harmonic reducer flexible gear bi-directional crowned tooth profile |
| CN105299151A (en) * | 2014-06-11 | 2016-02-03 | 南京理工大学 | Harmonic gear reducer |
| CN206918194U (en) * | 2017-05-04 | 2018-01-23 | 盐城工学院 | Double pressure angles are segmented involute gear |
| CN109099115A (en) * | 2018-10-25 | 2018-12-28 | 北京工商大学 | A kind of flexbile gear has the harmonic gear transmission of automatic positioning function |
| CN210830370U (en) * | 2019-09-27 | 2020-06-23 | 贵州群建精密机械有限公司 | A change thick flexbile gear for harmonic gear drive |
-
2019
- 2019-09-27 CN CN201910926667.7A patent/CN110513463A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243565A (en) * | 1987-03-30 | 1988-10-11 | Agency Of Ind Science & Technol | Gear unit for acceleration/deceleration driving device |
| JP2004125054A (en) * | 2002-10-02 | 2004-04-22 | Toyota Motor Corp | Forging gear, method of manufacturing the same, and mould for forging gear |
| CN102374273A (en) * | 2010-08-18 | 2012-03-14 | 李宁 | Tooth profile design of dual-pressure angle involute helical tooth externally-meshed cylindrical gear |
| CN103615501A (en) * | 2013-11-06 | 2014-03-05 | 中国航天科技集团公司第九研究院第七七一研究所 | Small harmonic reducer and optimum design method thereof |
| CN105299151A (en) * | 2014-06-11 | 2016-02-03 | 南京理工大学 | Harmonic gear reducer |
| CN104625664A (en) * | 2014-12-24 | 2015-05-20 | 厦门大学 | Numerical control machining method for harmonic reducer flexible gear bi-directional crowned tooth profile |
| CN206918194U (en) * | 2017-05-04 | 2018-01-23 | 盐城工学院 | Double pressure angles are segmented involute gear |
| CN109099115A (en) * | 2018-10-25 | 2018-12-28 | 北京工商大学 | A kind of flexbile gear has the harmonic gear transmission of automatic positioning function |
| CN210830370U (en) * | 2019-09-27 | 2020-06-23 | 贵州群建精密机械有限公司 | A change thick flexbile gear for harmonic gear drive |
Non-Patent Citations (1)
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| 余宁;阮毅;麦丽菊;: "谐波齿轮减速器双圆弧齿形的设计", 机电工程技术, no. 11, 28 November 2018 (2018-11-28) * |
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