CN208619625U - A kind of novel bicircular arcs harmonic wave tooth form - Google Patents
A kind of novel bicircular arcs harmonic wave tooth form Download PDFInfo
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- CN208619625U CN208619625U CN201821121075.5U CN201821121075U CN208619625U CN 208619625 U CN208619625 U CN 208619625U CN 201821121075 U CN201821121075 U CN 201821121075U CN 208619625 U CN208619625 U CN 208619625U
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- tooth
- flexbile gear
- gear external
- tooth form
- steel wheel
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Abstract
The utility model discloses a kind of novel bicircular arcs harmonic wave tooth forms, including intermeshing flexbile gear external tooth and steel wheel internal tooth, the tooth form of the flexbile gear external tooth is arc-shaped, the tooth form and flexbile gear external tooth tooth form of the steel wheel internal tooth are conjugated, the modulus of the flexbile gear external tooth and steel wheel internal tooth is 0.2697, pressure angle is 21.75 °, and the number of teeth of the flexbile gear external tooth is 160, the number of teeth 162 of steel wheel internal tooth.The bicircular arcs tooth form of the utility model is different from traditional involute profile, and bicircular arcs tooth form substitutes involute with arc section, and along with operation is also modified to tooth top, so that entire flank profil is more smooth, the ability to bear of tooth is also stronger.
Description
Technical field
The utility model relates to technical field of mechanical transmission, more particularly to a kind of novel bicircular arcs harmonic wave tooth form.
Background technique
The high transmission accuracy of harmonic gear transmission, transmission ratio is big, can operate normally under confined space and radiation condition
Advantage, therefore, harmonic gear transmission are widely used to many fields, especially in industrial robot field, primary drive
Task is undertaken by harmonic gear.Itself with regard to harmonic wave technology, it is involute harmonic wave that research achievement is more outstanding
Gear drive, although the design method of involute is able to satisfy design objective, the design method based on involute is at high cost, effect
Rate is low, and the period is also long, so that the popularization of harmonic speed reducer technology receives restriction.
Due to by theoretical restriction of involute teeth itself, based on involute harmonic gear transmission theory and design method
Research is controlled mainly to guarantee that interference of tooth does not occur for flank profil as design criteria by changing involute modification coefficient
Backlash.And there are gaps for flank and tooth top in engagement process for involute profile or the tooth form of involute deformation, no
Can be at a fully engaged, meeting accelerating gear abrasion causes transmission accuracy low, reduces bearing capacity.
Utility model content
In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a kind of novel bicircular arcs harmonic wave tooth forms.
The utility model is that technical solution used by solving the problems, such as it is:
A kind of novel bicircular arcs harmonic wave tooth form, including intermeshing flexbile gear external tooth and steel wheel internal tooth, the flexbile gear external tooth
Tooth form be it is arc-shaped, the tooth form of the steel wheel internal tooth and flexbile gear external tooth tooth form are conjugated, the flexbile gear external tooth and steel wheel internal tooth
Modulus is 0.2697, and pressure angle is 21.75 °, and the number of teeth of the flexbile gear external tooth is 160, the number of teeth 162 of steel wheel internal tooth.
Further, the tip diameter of the flexbile gear external tooth is 43.338mm, root diameter 42.619mm.
Further, the height of teeth top deviation factor of the flexbile gear external tooth and steel wheel internal tooth is 0.008.
The beneficial effects of the utility model are: a kind of novel bicircular arcs harmonic wave tooth form that the utility model uses, using double
Arc toothed design, compared with involute profile, tooth height reduces 20% or so compared to involute profile, and the facewidth increases
10% or so.Since tooth form reduces height of teeth top, the width of tooth is broadened, so that the torque that can be carried greatly increases.It is double simultaneously
The number of teeth of circular arc engagement is more, and engagement ratio is especially big, and up to 32%, tight mesh is realized, engagement is steady, transmission accuracy
It is high.Moreover, bicircular arcs tooth form modulus is small, the number of teeth is more, and transmission ratio is especially high, so that transferable torque greatly improves.
Detailed description of the invention
Fig. 1 is the tooth form schematic diagram of the utility model flexbile gear external tooth；
Fig. 2 is the tooth form schematic diagram of the utility model steel wheel internal tooth；
Specific embodiment
The utility model is described in further detail with example with reference to the accompanying drawing.
As shown in Figs. 1-2, the utility model provides a kind of novel bicircular arcs harmonic wave tooth form, including the body of rod, including nibbles mutually
The flexbile gear external tooth and steel wheel internal tooth of conjunction, the tooth form of flexbile gear external tooth be it is arc-shaped, the tooth form and flexbile gear external tooth tooth form of steel wheel internal tooth are total
The modulus of yoke, flexbile gear external tooth and steel wheel internal tooth is 0.2697, and pressure angle is 21.75 °, and the number of teeth of flexbile gear external tooth is 160, in steel wheel
The number of teeth 162 of tooth.Bicircular arcs tooth form is different from traditional involute profile, and bicircular arcs tooth form substitutes involute with arc section,
Along with operation is also modified to tooth top, so that entire flank profil is more smooth, the ability to bear of tooth is also stronger.
In the present embodiment, the tip diameter of flexbile gear external tooth is 43.338mm, root diameter 42.619mm.
The height of teeth top deviation factor of flexbile gear external tooth and steel wheel internal tooth is 0.008.
As shown in Figure 1, flexbile gear external tooth tooth form uses designed arc-shaped appearance, the circular arc AB in left side is using F1 as the center of circle, radius R1；It cuts
Line BC is the common tangential of circular arc AB and circular arc C D；Circular arc C D is using F2 as the center of circle, radius R2；Transition arc DE is circle with F3
The heart, radius R3；EF is using F4 as the center of circle for addendum circle arc amendment, radius R4；Circular arc AB and circular arc C D passes through the smooth company of tangent line BC
It connects；Tooth top passes through the tangent connection of transition arc DE using amendment circular arc EF design, circular arc C D and tooth top amendment circular arc EF；Right circles
Arc is symmetrical by centre symmetry line with left arc.
The radius specific value of each section of circular arc of flexbile gear external tooth tooth form can be multiplied to obtain, such as by modulus with radius factor
Following table:
As shown in Fig. 2, steel wheel internal tooth tooth form uses the design being conjugated with flexbile gear external tooth tooth form, so that steel wheel can be with flexbile gear
Engaged transmission, circular arc BC and circular arc DE are smoothly connected by common tangential CD, and tooth top is using amendment circular arc FG design, tooth top amendment
Circular arc is connect with circular arc DE by transition arc EF, and tooth root uses transition arc AB；Right circular arc and left arc pass through center
Line of symmetry is symmetrical.
The radius specific value of each section of circular arc of steel wheel internal tooth tooth form, again may be by modulus and radius factor is mutually multiplied
It arrives, is as follows:
| Flank profil title | Numerical value |
| Modulus | 0.2697 |
| Transition arc AB radius factor | 0.44~0.46 |
| Circular arc BC radius factor | 3.65~3.85 |
| Circular arc DE radius factor | 0.75~0.85 |
| Pressure angle | 21.75 |
| Transition arc EF radius factor | 0.4~0.6 |
In the past for the design method of involute harmonic gear transmission, mainly with by change involute modification coefficient come
Backlash is controlled, guaranteeing that interference of tooth does not occur for flexbile gear flank profil and firm gear is design criteria.By the design of such design method
Harmonic gear transmission, under no-load condition, flexbile gear and firm gear only have several pairs of teeth to be in meshing state.After load, flexbile gear by turn
Square effect, flexbile gear deform again, allow and more generate engagement to tooth, while flexbile gear no longer keeps ellipse under wave producer effect
Round.In practical applications, involute harmonic gear transmission exposes the irrationality of tooth form gradually.
Under the same conditions, double circular arc tooth outline flexbile gear root stress reduces 25% than involute profile flexbile gear root stress
Left and right, the precision of circular curve harmonic drive gear more improve several arcs point, essence than the precision of involute harmonic drive gear
Degree even can achieve second grade.Circular curve harmonic drive gear applies the return difference essence that robot can be significantly improved in robot
Degree, while reducing the noise of machine man-hour, improve machine task efficiency.
The utility model tooth form uses bicircular arcs tooth Shape Design, and compared with involute profile, tooth height is compared to involute teeth
Shape reduces 20% or so, and the facewidth increases 10% or so.Since tooth form reduces height of teeth top, the width of tooth is broadened, is made
The torque that obtaining can carry greatly increases.The number of teeth of bicircular arcs engagement simultaneously is more, and engagement ratio is especially big, and up to 32%, it realizes
Tight mesh, engagement is steady, high transmission accuracy.Moreover, bicircular arcs tooth form modulus is small, the number of teeth is more, and transmission ratio is especially high, so that
Transferable torque greatly improves.
The above, the only preferred embodiment of the utility model, the utility model are not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Claims (3)
1. a kind of novel bicircular arcs harmonic wave tooth form, it is characterised in that: described including intermeshing flexbile gear external tooth and steel wheel internal tooth
The tooth form of flexbile gear external tooth is arc-shaped, tooth form and flexbile gear external tooth the tooth form conjugation of the steel wheel internal tooth, the flexbile gear external tooth and steel
The modulus for taking turns internal tooth is 0.2697, and pressure angle is 21.75 °, and the number of teeth of the flexbile gear external tooth is 160, the number of teeth of steel wheel internal tooth
162。
2. a kind of novel bicircular arcs harmonic wave tooth form according to claim 1, it is characterised in that: the tooth top of the flexbile gear external tooth
Circular diameter is 43.338mm, root diameter 42.619mm.
3. a kind of novel bicircular arcs harmonic wave tooth form according to claim 1, it is characterised in that: the flexbile gear external tooth and steel wheel
The height of teeth top deviation factor of internal tooth is 0.008.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821121075.5U CN208619625U (en) | 2018-07-11 | 2018-07-11 | A kind of novel bicircular arcs harmonic wave tooth form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821121075.5U CN208619625U (en) | 2018-07-11 | 2018-07-11 | A kind of novel bicircular arcs harmonic wave tooth form |
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| CN208619625U true CN208619625U (en) | 2019-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662116A (en) * | 2018-07-11 | 2018-10-16 | 广东南大机器人有限公司 | A kind of novel bicircular arcs harmonic wave tooth form |
| CN110162924A (en) * | 2019-06-03 | 2019-08-23 | 珠海格力电器股份有限公司 | A kind of harmonic drive mechanism and harmonic speed reducer |
-
2018
- 2018-07-11 CN CN201821121075.5U patent/CN208619625U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662116A (en) * | 2018-07-11 | 2018-10-16 | 广东南大机器人有限公司 | A kind of novel bicircular arcs harmonic wave tooth form |
| CN110162924A (en) * | 2019-06-03 | 2019-08-23 | 珠海格力电器股份有限公司 | A kind of harmonic drive mechanism and harmonic speed reducer |
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