CN201133460Y - Arc spiral cylindrical gear and arc teeth bar - Google Patents
Arc spiral cylindrical gear and arc teeth bar Download PDFInfo
- Publication number
- CN201133460Y CN201133460Y CNU2007200926231U CN200720092623U CN201133460Y CN 201133460 Y CN201133460 Y CN 201133460Y CN U2007200926231 U CNU2007200926231 U CN U2007200926231U CN 200720092623 U CN200720092623 U CN 200720092623U CN 201133460 Y CN201133460 Y CN 201133460Y
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- tooth
- arc
- gear
- teeth
- involute
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Abstract
The utility model discloses an arc spiral cylindrical gear and an arc spiral rack; the arc spiral cylindrical gear consists of a convex tooth surface (1), a concave tooth surface (2), a tooth root (3) and a tooth top (4); section outlines (13), (14) arranged at the middle point of the wheel tooth length are in the involute curve tooth shape of a spur gear and spire to the positions of outline involute curves (5), (6), (7) on both end faces of the wheel tooth towards both ends along convex surface arc lines (9), (10) on the convex tooth surface (1) and concave surface arc lines (11), (12) on the concave tooth surface (2), to form a two-way arc spiral tooth consisting of a two-way spiral tooth trace with one end of right spiral arc-shaped oblique tooth and the other end of left spiral arc-shaped oblique tooth. A tooth bit of an arc rack consists of a convex tooth surface (1-1), a concave tooth surface (2-1), a tooth root (3-1) and a tooth top (4-1); the involute is a straight line; the shape and the size of middle teeth of a tooth bit graduated circle expansion section and tooth space are totally the same, and the middle teeth and the tooth spacing are lined at intervals; the tooth thickness (c) at the middle point of the tooth bit (L) and the tooth spacing width (d) are narrowed gradually towards both ends along the graduated circle (R). The gear, the rack graduated circle and other curve spiral meshing traces are precise, form 100 percent contact surfaces with the contact area larger than any gear and rack of comparable tooth surface width, so the bearing capability and the service life are higher than prior gears and racks.
Description
Technical field
The present invention relates to a kind of driving gear, especially a kind of arc helix cylindrical gear and arc helical rack.
Background technique
Gear transmission is most widely used a kind of type of belt drive, cylindrical gears " tooth trace " has three kinds of forms at present: spur gear (spur wheel), helical gear (spiral gear), the 4th kind of form of herringbone gear (herringbone gear) " arc tooth cylindrical gear " are " bent tooth trace mesh form " research topics of being delivered by the U.S. in 1975.It is involute profile in facewidth central authorities cross section that sample is put on display in international new technology exhibition in 1986, leaves central authorities and is the morpheme approximative value, and " tooth trace " surface of contact part does not produce load, and three precision and ideal form are not inconsistent.So domestic name of patent application that has occurred many these problems from nineteen ninety so far: " cylinder arc gear ", " arc cylindrical gear ", " curved tooth face cylindrical gears ", " arch arc cylindrical gears ", " involute-circular tooth gear " " bidirectional circular-arc gear " or the like, pass through retrieving information, the research back finds that this gear meshing theory also lacks systematic Study, kinematic accuracy, transmission stability, contact precision, and various design parameter shortage is proved foundation.Up to now, all can not obtain excellent popularization uses.
Summary of the invention
The purpose of this invention is to provide a kind of stable drive, volume is little, in light weight, moment of torsion is big, the life-span is long highi degree of accuracy high strength arc helix cylindrical gear and arc helical rack.
Technological scheme of the present invention is: a kind of arc helix cylindrical gear, the gear teeth are by convex side (1), the recessed flank of tooth (2), tooth root (3) and tooth top (4) are formed, the Mean section profile line (13) that gear teeth tooth is long, (14) be the involute profile of spur wheel, respectively to two ends along the convex surface camber line (9) on the convex side (1), (10) and the concave surface camber line (11) on the recessed flank of tooth (2), (12) spiral is to the profile involute (5) of gear teeth both ends of the surface, (6), (7), (8) position, form an end dextrorotation arc helical teeth, the two-way arc helical tooth that the bidirectional screw tooth trace of the left-handed arc helical teeth of the other end constitutes; The radius of curvature of two ends helical teeth (5), (6), (7), (8) normal direction involute is greater than the radius of curvature of mid point (13), (14) involute, i.e. r
2＞r
1, and gear teeth standard pitch circle to launch in the section shape size of tooth and roller seating space identical, i.e. a=b=c=d, R
1=R
2=R
3R
nThe facewidth of two-way arc helical tooth (L) mid point transverse tooth thickness (c) and roller seating space wide (d), respectively to two ends along standard pitch circle (R) convergent, two ends transverse tooth thickness and roller seating space are wide when L/R=2 is condensed to zero, involute radius of curvature distortion in two ends is extended linearly, i.e. r
2=∞.
Camber line R
10, R
12, R
9, R
11Radius of curvature and the R value correlation of standard pitch circle: R
10=R
12＞R＞R
9=R
11
Two-way arc helical tooth arbitrary end cuts the spur wheel involute profile that section all presents rule.
The facewidth of two-way arc helical tooth (L) mid point spur wheel modulus is constantly equal to the transverse module of two ends arc helical teeth.
A kind of arc rack, teeth are made up of convex side (1-1), the recessed flank of tooth (2-1), tooth root (3-1), tooth top (4-1), and involute is linearly, it is characterized in that: the shape size of tooth and roller seating space is identical in the teeth standard pitch circle expansion section, alternately, i.e. a=b=c=d, R
1=R
2=R
3R
nTeeth (L) mid point transverse tooth thickness (c) and roller seating space wide (d), respectively to two ends along standard pitch circle (R) convergent, two ends transverse tooth thickness and roller seating space are wide when L/R=2 is condensed to zero.
Camber line R
12-1, R
10-1, R
9-1, R
11-1Radius of curvature and the R value correlation of standard pitch circle: R
12-1=R
10-1＞R＞R
9-1=R
11-1
The teeth transverse module is constantly equal to the mid point module.
Advantage of the present invention:
1, bent arc helical toothing track such as this gear and tooth bar standard pitch circle is tightly accurate, and recessed flank of tooth top arc equals convex side root arc, greater than convex side top arc and recessed flank of tooth root arc, has formed 100% surface of contact, perfect mesh theory.Gear arbitrary end cross section all presents the involute profile of rule.Make wheel set can both produce load in the arbitrfary point on the overlap coefficient inner toothed surface of engaging-in and disengaging, area of contact is higher than any gear and the tooth bar of the face width of tooth on year-on-year basis.So are higher than existing gear rack in its bearing capacity and working life.
2, three precision of this gear and tooth bar are higher than similar other products.The crooked long mid point tooth of tooth is the thickest, it is the peak of full-depth tooth intensity, no matter just changeing counter-rotating, having produced the spiral continuity in the engaging-in process takes over, kept stable drive, and (axiom: kinematic accuracy and noise cause owing to back lash and involute error, have a strong impact on the high speed transmission because the tight accurately no gap of movement locus and noise free; The intensity of gear and life-span are except that material, and be all relevant with three precision with shape, and shape is relevant with manufacturing technology with three precision, and manufacturing technology is carried out according to mesh theory.); Over more than 30 year, this mesh theory ideal form imperfection is in use because bent flank of tooth physical form is firm and than herringbone gear intensity height, but three precision bound by theory do not have the demonstration foundation of 100% surface of contact, though can use, but do not pass a test at a high speed, low speed is undesirable, the manufacture cost height.Contained the popularization and application of this tooth kind.The present invention has finished the manufacturing of this ideal form on theory and practice, make wheel set in the process of engaging-in and disengaging, and the arbitrfary point in the overlap coefficient on institute's geared surface can both produce load, and force bearing point is evenly distributed.
3, because transverse module is constantly equal to mid point spur wheel modulus, can realize height and angle correcting, widen centre distance and modulus and selected degrees of freedom, for popularization and application provides design and inspection parameter foundation.
4, because teeth directional is an arc tooth line, can prolong a tooth trace angle of rotation (± 2.5 °) does not influence transmission.So wheel set installation parallelism error adaptability is strong, can suffer from one's own actions best contact position, be implemented in 0 °～5 ° with internal burden free axis friendship transmission.That is to say, be not afraid of initiatively and between the driven frame runout takes place.For example: heavily loaded turning round equipment, drive chassis are in the partial installation of cylindrical shell follower, and operational vibration is very big to straight-tooth or helical gear influence in working life.If adopt the present invention to address the above problem.Can cause the design new breakthrough in the gear application area, with interior swing driving mechanism, or be applied in 0 °～5 ° and hand over transmission with interior axle such as 0 °～5 ° of: top to bottom, left and right, front and rear.
5, tooth-shape structure of the present invention is similar to herringbone gear, and no axial force has solved the manufacturing difficult problem of miniature herringbone gear.Alternative herringbone gear has been filled up the blank of miniature no clearance groov herringbone gear in the application in some field.Manufacture cost is lower than herringbone gear, is equivalent to helical gear.Big gear can form automatic production in batches, and cost is equivalent to spur gear.
6, the no clearance groov herringbone tooth bar of the arc rack image curvature among the present invention, no axial force has been filled up the blank of herringbone tooth bar.
7, the present invention is applied on the various speed reducers, under the identical prerequisite of moment of torsion overall volume is dwindled on year-on-year basis, has played the chain effect of energy-conservation joint time material.If heavily loaded bull gear adopts effect of the present invention then more remarkable, can make the gear ring of moment of torsion on year-on-year basis alleviate at double weight, save a large amount of alloy steel products.
It can make the various huge mechanical transmission mechanism reduced volumes and the effect of integrated package invention play the same tune on different musical instruments, and can transmit great moment of torsion in limited space, does not crack a joke.Resist the moment enormous impact power that unexpected stall or counter-rotating cause, than the big several times of herringbone gear of the identical face width of tooth.The clearance groov of herringbone gear disconnects angle steel disjunctor in the most strong tooth, has lost mutual support force, has taken useful space, and Here it is, and why the present invention can make one of argument of mechanical transmission reduced volume.
8, the present invention can be applicable to the various industry fields that cylindrical gears is used, and is the Updated product of straight-tooth, helical teeth, herringbone gear.Because surface of contact is that the camber line full-depth tooth is stressed, so can replace hard flank of tooth reduction gear (hard flank of tooth helical gear is the spiral points contact, and the force bearing point pressure of local overlap coefficient is very big, just adopts hardened face gear).
9, this gear can be realized mill teeth, roll flute, shaving, plover tooth process, makes the highi degree of accuracy high strength gear that volume is little, in light weight, moment of torsion is big, the life-span is long, is the best driving gears of Aero-Space.
Description of drawings
Fig. 1 is an arc helix cylindrical gear monodentate stereogram;
Fig. 2 is the end face plan view of Fig. 1;
Fig. 3 is that the A-A standard pitch circle of Fig. 2 launches sectional drawing;
Fig. 4 is an arc helical rack stereogram.
Embodiment
The gear main structure gear teeth of the present invention are as shown in Figure 1: be made up of convex side 1, the recessed flank of tooth 2, tooth root 3, tooth top 4.The Mean section profile line 13,14 of the long L of tooth is the involute profile of spur wheel, respectively to profile involute 5,6,7,8 positions of two ends along 11,12 spirals of the concave surface on the convex surface camber line on the convex side 19,10 and the recessed flank of tooth 2 to gear teeth both ends of the surface, form an end dextrorotation arc helical teeth, the bidirectional screw tooth that the bidirectional screw tooth trace of the left-handed arc helical teeth of the other end constitutes.The radius of curvature of two ends arc helical teeth 5,6,7,8 involutes is greater than the radius of curvature of long mid point 13,14 involutes of tooth, r in (as Fig. 2)
2＞r
1, the distortion of two ends involute radius of curvature is extended linearly when L/R=2, i.e. r
2=∞, (Fig. 3) in standard pitch circle launch section, the shape size of tooth and roller seating space is identical, i.e. a=b=c=d, R
1=R
2=R
3R
n(c) (d) be that (L) mid point transverse tooth thickness and roller seating space are wide, respectively to two ends along (R) convergent, the wide disappearance of two ends transverse tooth thickness and roller seating space is zero when L/R=2.The wheel set meshing condition: standard pitch circle launches musical form R such as section
1=R
2=R
3R
n(Fig. 1) radius of curvature of camber line 9,10,11,12 and R value correlation (Fig. 3): R
10=R
12＞R＞R
9=R
11Two-way arc helical tooth arbitrary end cuts the spur wheel involute profile that section all presents rule.The long L mid point of tooth spur wheel modulus is constantly equal to the transverse module of two ends arc helical teeth.
Arc helix cylindrical gear characteristics:
1, because transverse module is constantly equal to mid point spur wheel modulus, can realize height and angle correcting, widen centre distance and modulus and selected degrees of freedom.Strong to spoke installation parallelism adaptability, can hand over transmission with the internal burden free axis at 0 degree-5 degree along tooth trace, be not afraid of in other words initiatively and between the follower frame runout takes place.For example: heavily loaded turning round equipment drive chassis and the partial installation of cylindrical shell follower, operational vibration is very big to straight-tooth or helical gear influence in working life.As adopt the present invention just can address the above problem.
2, shape checking: to being buckled together, flank of tooth contact rate 100% meshes entirely with the engagement of two toothed rack.Introduction: when arc helix cylindrical gear diameter is infinitely great, become arc rack.No matter this gear is just changeing counter-rotating with tooth bar can both contact by 100% flank of tooth.The arbitrary end cross section all presents the involute profile of rule.Make wheel set can both produce load in the arbitrfary point on the overlap coefficient inner toothed surface of engaging-in and disengaging, area of contact is higher than any gear and the tooth bar of the face width of tooth on year-on-year basis.
3, Wan Qu flank of tooth mid point tooth is the thickest is full-depth tooth changqiang degree peak, produce the spiral continuity in the engaging-in process in two ends and taken over the maintenance stable drive, and the noise free owing to the tight accurately no gap of movement locus, existing gear-driven accuracy is not good enough and noise is that back lash and involute error cause.Structure of the present invention can make the flank of tooth at engaging-in and detach procedure, and the arbitrfary point of contact ratio internal tooth face length can both touch the load of generation, and force bearing point is evenly distributed.
Arc rack is the secondary tooth bar of joining with the engagement of arc helix cylindrical gear.(as Fig. 4) teeth are made up of convex side 1-1, recessed flank of tooth 2-1, tooth root 3-1, tooth top 4-1.Involute linearly.Standard pitch circle expansion section is this tooth bar reticule section shape in above-mentioned (Fig. 3).The shape size of tooth and roller seating space is identical, alternately.Deng musical form: R
1=R
2=R
3R
n, etc. form a=b=c=d.C, d are that tooth long L mid point transverse tooth thickness and roller seating space are wide, respectively to two ends along standard pitch circle R convergent, two ends transverse tooth thickness and roller seating space are wide when L/R=2 is condensed to zero.
Rack and pinion meshing condition: the radius of curvature of Fig. 4 mean camber line 9-1,12-1,11-1,10-1 and R value correlation (Fig. 3): R
12-1=R
10-1＞R＞R
9-1=R
11-1Transverse module is constantly equal to mid point spur wheel modulus.
The utility model and prior art data contrast as following table:
Claims (7)
1, a kind of arc helix cylindrical gear, the gear teeth are made up of convex side (1), the recessed flank of tooth (2), tooth root (3) and tooth top (4), it is characterized in that; Long Mean section profile line (13), (14) of gear teeth tooth are the involute profile of spur wheel, respectively to profile involute (5), (6), (7), (8) position, two ends along the concave surface camber line (11) on the convex surface camber line (9) on the convex side (1), (10) and the recessed flank of tooth (2), (12) spiral to gear teeth both ends of the surface, form an end dextrorotation arc helical teeth, the two-way arc helical tooth that the bidirectional screw tooth trace of the left-handed arc helical teeth of the other end constitutes; The radius of curvature of two ends helical teeth (5), (6), (7), (8) normal direction involute is greater than the radius of curvature of mid point (13), (14) involute, i.e. r
2＞r
1, and gear teeth standard pitch circle to launch in the section shape size of tooth and roller seating space identical, i.e. a=b=c=d, R
1=R
2=R
3R
nThe facewidth of two-way arc helical tooth (L) mid point transverse tooth thickness (c) and roller seating space wide (d), respectively to two ends along standard pitch circle (R) convergent, two ends transverse tooth thickness and roller seating space are wide when L/R=2 is condensed to zero, involute radius of curvature distortion in two ends is extended linearly, i.e. r
2=∞.
2, arc helix cylindrical gear according to claim 1 is characterized in that: camber line R
9, R
10, R
11, R
12Radius of curvature and the R value correlation of standard pitch circle: R
10=R
12＞R＞R
9=R
11
3, arc helix cylindrical gear according to claim 1 is characterized in that: two-way arc helical tooth arbitrary end cuts the spur wheel involute profile that section all presents rule.
4,, arc helix cylindrical gear according to claim 1, it is characterized in that: the facewidth of two-way arc helical tooth (L) mid point spur wheel modulus is constantly equal to the transverse module of two ends arc helical teeth.
5, a kind of arc rack, teeth are made up of convex side (1-1), the recessed flank of tooth (2-1), tooth root (3-1), tooth top (4-1), and involute is linearly, it is characterized in that: the shape size of tooth and roller seating space is identical in the teeth standard pitch circle expansion section, alternately, i.e. a=b=c=d, R
1=R
2=R
3R
nTeeth (L) mid point transverse tooth thickness (c) and roller seating space wide (d), respectively to two ends along standard pitch circle (R) convergent, two ends transverse tooth thickness and roller seating space are wide when L/R=2 is condensed to zero.
6, the arc rack of stating according to claim 5 is characterized in that: camber line R
12-1, R
10-1, R
9-1, R
11-1Radius of curvature and the R value correlation of standard pitch circle: R
12-1=R
10-1＞R＞R
9-1=R
11-1
7, the arc rack of stating according to claim 5 is characterized in that: the teeth transverse module is constantly equal to the mid point module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200926231U CN201133460Y (en) | 2007-11-09 | 2007-11-09 | Arc spiral cylindrical gear and arc teeth bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200926231U CN201133460Y (en) | 2007-11-09 | 2007-11-09 | Arc spiral cylindrical gear and arc teeth bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201133460Y true CN201133460Y (en) | 2008-10-15 |
Family
ID=40061732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200926231U Expired - Fee Related CN201133460Y (en) | 2007-11-09 | 2007-11-09 | Arc spiral cylindrical gear and arc teeth bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201133460Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865271A (en) * | 2010-05-19 | 2010-10-20 | 常州大学 | Gear with epicycloid-shaped tooth trace |
| CN104482165A (en) * | 2014-11-17 | 2015-04-01 | 扬州大学 | Bidirectional arc cylindrical gear |
| CN104500695A (en) * | 2014-12-26 | 2015-04-08 | 方年学 | Arc gear and arc rack |
-
2007
- 2007-11-09 CN CNU2007200926231U patent/CN201133460Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865271A (en) * | 2010-05-19 | 2010-10-20 | 常州大学 | Gear with epicycloid-shaped tooth trace |
| CN104482165A (en) * | 2014-11-17 | 2015-04-01 | 扬州大学 | Bidirectional arc cylindrical gear |
| CN104500695A (en) * | 2014-12-26 | 2015-04-08 | 方年学 | Arc gear and arc rack |
| CN104500695B (en) * | 2014-12-26 | 2017-07-07 | 方年学 | Gear with curved teeth and arc rack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20111109 |