CN209621998U - A kind of single-circular-arc gear structure - Google Patents
A kind of single-circular-arc gear structure Download PDFInfo
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- CN209621998U CN209621998U CN201821482997.9U CN201821482997U CN209621998U CN 209621998 U CN209621998 U CN 209621998U CN 201821482997 U CN201821482997 U CN 201821482997U CN 209621998 U CN209621998 U CN 209621998U
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- circular arc
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Abstract
The utility model discloses a kind of single-circular-arc gear structures, are the double wedge and concave tooth of one section of circular arc including work flank profil, the double wedge circular arc profile and concave tooth circular arc profile are one section of not only circular arcs in node but also outside node.The double wedge circular arc profile and concave tooth circular arc profile of the utility model are one section of not only circular arcs in node but also outside node, and upper contact point is located at other than node when double wedge is engaged with concave tooth, and lower contact point is located within node；Regardless of the gear teeth of driving gear are convex circular arc profile or concave arc flank profil when two-wheeled engaged transmission, have simultaneously before node and node latter two engaged transmission characteristic；In the identical situation of geometric dimension, double wedge is dramatically increased with the contact point in the length and the gear teeth of two gear teeth profile contact lines when concave tooth engaged transmission, and bearing capacity and service life are further improved.
Description
Technical field
The utility model relates to a kind of single-circular-arc gear structures, belong to gear transmission technology field.
Background technique
Compared with involute gear, in the identical situation of geometric dimension, the normal radius of curvature ratio of wildhaber-novikov gear is gradually opened
The big decades of times of the normal radius of curvature of line gear, contact stress will greatly improve sharp fall, contact strength.Therefore,
Wildhaber-novikov gear is power transmission gear a kind of higher than involute gear bearing capacity, that the service life is longer.
Wildhaber-novikov gear is divided into single-circular-arc gear and Novikov gears with double circular arc tooth profiles.The tooth shape character of single-circular-arc gear is that its work flank profil is
One section of circular arc, the gear teeth on a gear are made into double wedge, and the gear teeth on another gear are made into concave tooth；The tooth form of Novikov gears with double circular arc tooth profiles
It is characterized in that its work flank profil is two sections of circular arcs, the gear tooth profile on a gear, it is recessed within pitch circle that pitch circle, which is outside convex flank profil,
Shape flank profil.
In the prior art, the double wedge circular arc profile of single-circular-arc gear is other than pitch circle, and concave tooth circular arc profile is within pitch circle；
It is engaged transmission after node when the driving gear gear teeth are convex circular arc profile；When the gear that the gear teeth are concave arc flank profil is actively
It is then engaged transmission before node when wheel；Therefore, only a kind of engaged transmission of a pair of of single-circular-arc gear transmission is special in the prior art
Property, major defect is: two gear teeth profile contact lines are shorter when engaged transmission, and the contact point on the gear teeth is less, though compare involute
The high long service life of gear drive bearing capacity, but its bearing capacity and service life nevertheless suffer from certain limitation.
Utility model content
The mesh of the utility model is: a kind of single-circular-arc gear structure is provided, regardless of driving gear when two-wheeled engaged transmission
The gear teeth be convex circular arc profile or concave arc flank profil, have simultaneously before node and node latter two engaged transmission characteristic, In
In the identical situation of geometric dimension, the length and the gear teeth of two gear teeth profile contact lines when dramatically increasing double wedge and concave tooth engaged transmission
On contact point, so that its bearing capacity and service life is further improved, to overcome the shortcomings of the prior art.
The technical solution of the utility model includes: a kind of single-circular-arc gear structure, is the double wedge of one section of circular arc including work flank profil
And concave tooth, the double wedge circular arc profile and concave tooth circular arc profile are one section of not only circular arcs in node but also outside node.
Further, pressure angle α=20 ° at the double wedge node；Double wedge height of teeth top ha1=(0.8~1) mn, double wedge height of teeth root
hf1=(1.05~1.25) mn；Arc radius ρa=2.25mn, facewidth direction center of circle offset la=ρacosαc-Sc/ 2, tooth Gao Fang
To center of circle offset ef=ρasinαc-Pc；Transverse tooth thickness S at double wedge nodea=π mn/ (2.1~2.2)；Double wedge root radius rg=
0.38mn。
Further, the concave tooth height of teeth top ha2=(1.05~1.25) mn, concave tooth height of teeth root hf2=(0.8~1) mn；Concave tooth
Space width W at nodef=π mn/2。
Further, the radius of the concave tooth circular arc profile is slightly larger than the radius of double wedge circular arc profile, and double wedge is engaged with concave tooth
Contact point p when transmissioncRange be-Pf≤pc≤Pa, upper contact point and nodal distance Pa=(0.6~0.8) mn；Lower contact point with
Nodal distance Pf=(0.4~0.6) mn。
M in above-mentioned formulanFor normal module, αcWith ScRespectively represent the pressure angle and transverse tooth thickness at contact point.
By adopting the above-described technical solution, utility model has the advantages that the double wedge circular arc profile of the utility model
It is one section of not only circular arc in node but also outside node with concave tooth circular arc profile, upper contact point is located at section when double wedge is engaged with concave tooth
Other than point, lower contact point is located within node；Two-wheeled engaged transmission when regardless of driving gear the gear teeth be convex circular arc profile or
Concave arc flank profil, has before node and node latter two engaged transmission characteristic simultaneously；It is convex in the identical situation of geometric dimension
Contact point when tooth and concave tooth engaged transmission in the length and the gear teeth of two gear teeth profile contact lines dramatically increases, bearing capacity and
Service life is further improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model double wedge normal profile；
Fig. 2 is the structural schematic diagram of the utility model concave tooth normal direction tooth socket.
Specific embodiment
It is right with reference to the accompanying drawings and examples in order to keep the purpose of this utility model, technical solution and advantage clearer
The utility model is described in further detail.
The embodiments of the present invention: the structural schematic diagram of single-circular-arc gear structure is as shown in Figures 1 and 2, including work
Flank profil is the double wedge and concave tooth of one section of circular arc, the double wedge circular arc profile and concave tooth circular arc profile be one section not only in node but also
Circular arc outside node.Pressure angle α=20 ° at the double wedge node；Double wedge height of teeth top ha1=(0.8~1) mn, double wedge height of teeth root hf1
=(1.05~1.25) mn；Arc radius ρa=2.25mn, facewidth direction center of circle offset la=ρacosαc-Sc/ 2, tooth Gao Fangxiang
Center of circle offset ef=ρasinαc-Pc；Transverse tooth thickness S at double wedge nodea=π mn/ (2.1~2.2)；Double wedge root radius rg=
0.38mn.The concave tooth height of teeth top ha2=(1.05~1.25) mn, concave tooth height of teeth root hf2=(0.8~1) mn；Tooth at concave tooth node
Groove width Wf=π mn/2.The radius of the concave tooth circular arc profile is slightly larger than the radius of double wedge circular arc profile, and double wedge engages biography with concave tooth
Contact point p when dynamiccRange be-Pf≤pc≤Pa, upper contact point and nodal distance Pa=(0.6~0.8) mn；Lower contact point and section
Point distance Pf=(0.4~0.6) mn.M in above-mentioned formulanFor normal module, αcWith ScRespectively represent the pressure angle and tooth at contact point
It is thick.
The double wedge circular arc profile and concave tooth circular arc profile of the utility model single-circular-arc gear structure are one section both in node
Circular arc outside node again, upper contact point is located at other than node when double wedge is engaged with concave tooth, and lower contact point is located within node；Two
Regardless of the gear teeth of driving gear are convex circular arc profile or concave arc flank profil when wheel engaged transmission, has simultaneously before node and save
Point latter two engaged transmission characteristic；In the identical situation of geometric dimension, double wedge connects with two gear tooth profiles when concave tooth engaged transmission
The contact point touched in the length and the gear teeth of line dramatically increases, and bearing capacity and service life are further improved.
Claims (3)
1. a kind of single-circular-arc gear structure is the double wedge and concave tooth of one section of circular arc including work flank profil, it is characterised in that: described convex
Tooth circular arc profile and concave tooth circular arc profile are one section of not only circular arcs in node but also outside node；Pressure angle at the double wedge nodeα=20°；Double wedge height of teeth toph a1 =(0.8~1) m n , double wedge height of teeth rooth f1 =(1.05~1.25) m n ；Arc radiusρ a =2.25m n, tooth
Wide direction center of circle offsetl a =ρ a cosα c - S c /2, the high direction center of circle offset of toothe f =ρ a sinα c - P c ；Tooth at double wedge node
It is thickS a=πm n / (2.1~2.2)；Double wedge root radiusr g=0.38m n, in formulam nFor normal module,α c WithS c Respectively represent contact
Pressure angle and transverse tooth thickness at point.
2. single-circular-arc gear structure according to claim 1, it is characterised in that: the concave tooth height of teeth toph a2 =(1.05~ 1.25) m n , concave tooth height of teeth rooth f2 =(0.8~1) m n ；Space width at concave tooth nodeW f=πm n/ 2, in formulam nFor normal module.
3. single-circular-arc gear structure according to claim 1, it is characterised in that: the radius of the concave tooth circular arc profile is bigger
In the radius of double wedge circular arc profile, double wedge and contact point when concave tooth engaged transmissionp cRange be- P f ≤p c ≤P a , upper contact point
With nodal distanceP a=(0.6~0.8) m n ；Lower contact point and nodal distanceP f=(0.4~0.6) m n , in formulam nFor normal module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821482997.9U CN209621998U (en) | 2018-09-11 | 2018-09-11 | A kind of single-circular-arc gear structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821482997.9U CN209621998U (en) | 2018-09-11 | 2018-09-11 | A kind of single-circular-arc gear structure |
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| Publication Number | Publication Date |
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| CN209621998U true CN209621998U (en) | 2019-11-12 |
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| CN201821482997.9U Active CN209621998U (en) | 2018-09-11 | 2018-09-11 | A kind of single-circular-arc gear structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843769A (en) * | 2018-09-11 | 2018-11-20 | 贵州群建精密机械有限公司 | A kind of single-circular-arc gear |
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2018
- 2018-09-11 CN CN201821482997.9U patent/CN209621998U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843769A (en) * | 2018-09-11 | 2018-11-20 | 贵州群建精密机械有限公司 | A kind of single-circular-arc gear |
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