CN109595324A - Reduction gear box motor and its gear - Google Patents
Reduction gear box motor and its gear Download PDFInfo
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- CN109595324A CN109595324A CN201910031822.9A CN201910031822A CN109595324A CN 109595324 A CN109595324 A CN 109595324A CN 201910031822 A CN201910031822 A CN 201910031822A CN 109595324 A CN109595324 A CN 109595324A
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- 210000003781 tooth socket Anatomy 0.000 description 2
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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
- F16H55/17—Toothed wheels
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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
- F16H55/0806—Involute profile
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Abstract
The invention discloses a kind of reduction gear box motor and its gears, comprising: multiple gear teeth successively to connect；The root portion of the gear teeth is U-type groove structure, and involute profile is equipped between the tooth top trace and root portion of the gear teeth；The tooth high mode ratio K1=h1/m of the gear teeth；Wherein h1 is that tooth is high；M is modulus；K1=3~6.8.Reduction gear box motor and its gear of the invention increases the amount of deflection and flexible deformation that can increase the gear teeth, reduces the strike note of gear by long addendum tooth height, tooth height.
Description
Technical field
The present invention relates to mechanical gear technical field more particularly to a kind of reduction gear box motors and its gear.
Background technique
Gear drive belongs to the one of the most common type kind of drive in machine driving in the prior art.Theoretically, Yi Duichi
Engagement place is taken turns, the gear tooth profile of one of gear should be between the tooth socket of corresponding another gear without sideshake.But in fact,
To compensate change in size caused by the temperature change due to caused by processing, rigging error and temperature change, to prevent from loading
Under state there is a phenomenon where pitch wheel generate easement curve interference or be stuck, must in the inoperative flank profil face of the gear teeth
It must there are certain backlash, this gap to be referred to as backlash.
Backlash is used to prevent from making bite in Meshing Process of Spur Gear due to processing, rigging error and thermal deformation, reduces gear and passes
Efficiency of movement；Gear occurs easement curve interference, accelerates gear wear in transmission process.Backlash can also to flank profil face there are
The space of lubricating oil film.Simultaneously because the presence of backlash also brings some problems and defect, particularly with to noise requirements compared with
High electric motor speed reducer gear transmission system.It is mainly shown as:
(1) in low-load reduction gear device, during motor needs frequent start-stop or positive and negative rotation to switch, by
It will lead to gear teeth work flank profil face moment shock in start-up course in the presence of backlash, generate biggish gear teeth strike note.
(2) motor increased is vibrated for ontology in normal course of operation, the gear in reduction gear box is due to being shaken
Dynamic influence, gear also will appear mutual vibration in engagement transmittance process, gear caused by gear transmitting mesh vibration occur
Sound.
(3) motor is in steadily output operational process, when load is caused to bear by external force or external loading drive mechanism reason
Carry the power that is applied on motor output shaft it is identical as the power direction that motor exports when, motor internal gear transmission system Central Plains at this time
This flank profil face normally engaged will appear segregation phenomenon, form gap.When load force does not stop variation, operational process is also resulted in
The phenomenon that gear tooth profile face is hit back and forth generates biggish gear rattle sound.As oscillating fan driving motor is used in electricity
Increase cam link structure outside machine, the load during yaw is consecutive variations, and during swinging commutation, is driven
Dynamic motor output shaft Impact direction is also variation, will appear motor gear teeth strike note in the process of running, so that user is comfortable
Sense is deteriorated with experience sense.
(4) gear when electric motor starting, positive and negative rotation switching or motor output shaft external force, which engages, hits,
It is easy to produce broken teeth.
The prior art solves to solve the problems, such as gear teeth strike note and broken teeth generally by gear backlash is reduced,
Higher standard requirements are carried out often by parts machining precision and matching requirements, it is stuck existing to reduce gear engagement
As such mode will lead to motor manufacturing increased costs.And for certain reduction gear box motors, such as phase synchronization electricity
There is the phenomenon that dead point in machine starting, if the too small poor starting that will lead to motor of gear backlash in itself.
There are also one is as described flexible gear teeth root in CN85200867U utility model patent in the prior art
Circular arc groove edge is made of straight line and circular arc, such structure there are the problem of in the intersection of straight line and the connection of circular arc
It generates stress to concentrate, under the alternate load effect of gear engagement, influences intensity and the service life of gear.
Summary of the invention
The first object of the present invention is to provide a kind of gear, to solve the amount of deflection for increasing the gear teeth and flexible deformation to reduce tooth
The technical issues of strike note between wheel.
The second object of the present invention is to provide a kind of reduction gear box motor, is become with solving the amount of deflection for increasing the gear teeth and elasticity
The technical issues of shape is to reduce the strike note between gear.
Gear of the invention is achieved in that
A kind of gear, comprising: multiple gear teeth successively to connect；The root portion of the gear teeth is U-type groove structure, and in institute
It states and is equipped with involute profile between the tooth top trace of the gear teeth and root portion；
The tooth high mode ratio K1=h1/m of the gear teeth；Wherein h1 is that tooth is high；M is modulus；K1=3~6.8.
In optional embodiment of the present invention, the U-type groove structure includes the first arc sections and symmetrically arranged and difference
The second arc sections of a pair being connected with the both ends of first arc sections；
The symmetry axis of a pair of second arc sections is the tooth space centerline of the gear teeth；
Second arc sections and the first arc sections are tangent, and the point of contact of the second arc sections and the tangent formation of the first arc sections
Tie point between as the second arc sections and the first arc sections；And
Second arc sections and the involute profile are tangent, and the second arc sections and the tangent formation of involute profile
Point of contact is the tie point between the second arc sections and involute profile.
In preferred embodiments of the present invention, the corresponding diameter of a circle of second arc sections is greater than first arc sections
Corresponding diameter of a circle.
In optional embodiment of the present invention, the U-type groove structure includes the first arc sections and symmetrically arranged and difference
A pair of of the straightway being connected with the both ends of first arc sections；
Circular sliding slopes are used at the tie point of first arc sections and straightway；And
Circular sliding slopes are used at the tie point of the straightway and involute profile.
In preferred embodiments of the present invention, the tooth high mode ratio K1 is 5.
In optional embodiment of the present invention, the high h1=of tooth (da-df1)/2；Wherein
Outside circle is da=df1+2h1=m (z+2h1*+2x)；
Root circle is df1, and df1 is using gear centre as dot and the diameter of a circle circumscribed with the first arc sections (2)；
X is the modification coefficient of profile modified gear.
In optional embodiment of the present invention, the radius r1 of the corresponding circle of first arc sections:
Wherein
Z is the number of teeth；α is pressure angle on reference circle.
Reduction gear box motor of the invention is achieved in that
The primary driven transmission wheel wheel piece of a kind of reduction gear box motor, the reduction gear box motor uses the tooth
Wheel；Gear is manufactured using Shooting Technique.
Using above-mentioned technical proposal, the present invention has the following beneficial effects: reduction gear box motor of the invention and
Its gear, by long addendum tooth height, tooth height increases the amount of deflection and flexible deformation that can increase the gear teeth, reduces the strike note of gear.
For motor when impingement phenomenon occurs for gear tooth in starting, commutation or operational process, tooth height increases the effect in flexible deformation
Under, portion of energy can be absorbed, the risk of tooth root broken teeth can also be reduced simultaneously by reducing gear rattle sound, can extend gear life.
Tooth height increases height, so that gear teeth elasticity and amount of deflection increase, can reduce is caused by part processing precision and assembly technology error
The stuck risk of motor, while being also conducive to the reduction gear box electric motor starting that there is starting dead point.
Further, it is connected by the second arc sections of the U-type groove structure of design with the circular arc of the first arc sections and (is also light
Slip), the stress that intersection of the root portion of gear compared to the prior art in arc sections and straight line portion generates is concentrated aobvious
Existing, circular arc connected structure of the invention can reduce tooth force in the process in the tie point of the second arc sections and the first arc sections
Place's stress concentrates the risk for leading to broken teeth, to improve the intensity and extension of gear under the alternate load effect of gear engagement
The service life of gear.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the gear teeth of the gear of the embodiment of the present invention；
Fig. 2 is the forming schematic diagram of the second arc sections of the gear teeth of the embodiment of gear of the invention；
Fig. 3 is the high schematic diagram of the full-height tooth gear teeth；
Fig. 4 is the high schematic diagram of the tooth of the gear of the embodiment of the present invention；
Fig. 5 is the partial structural diagram of the gear of the embodiment of the present invention；
Fig. 6 is the schematic diagram of the drive mechanism of the reduction gear box motor of the embodiment of the present invention；
Fig. 7 is 10 times of amplification assumption diagrams in the portion A of Fig. 6；
Fig. 8 is the schematic diagram of the primary driven transmission wheel wheel piece of the reduction gear box motor of the embodiment of the present invention；
Fig. 9 is the detonation configuration figure of the reduction gear box motor of the embodiment of the present invention；
Figure 10 is the partial enlargement structure chart in Fig. 9.
In figure: U-type groove structure 1, the first arc sections 2, the second arc sections 3, involute profile 4, tooth top trace 5, primary biography
Dynamic driven wheel wheel piece 7, primary transmission driving wheel 8.
Specific embodiment
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
Embodiment 1:
It please refers to shown in Fig. 1 to Fig. 5, present embodiments provides a kind of gear, comprising: multiple gear teeth successively to connect；Wheel
The root portion of tooth is U-type groove structure 1, and involute profile 4 is equipped between the tooth top trace 5 and root portion of the gear teeth.
The tooth high mode ratio K1=h1/m of the gear teeth of the present embodiment；Wherein h1 is that tooth is high；M is modulus；The range of K1 is 3
~6.8.For the range of K1 herein, it is preferred that K1 5.
Specifically, the tooth height of the gear teeth is smaller for the absorption for improving impact energy when tooth high mode ratio K1 is lower than 3,
Because unobvious for strike note improvement existing between gear.And when tooth high mode ratio K1 is higher than 6.8, gear teeth tooth is high
Excessively high, flexible deformation is excessive, then influences the transmission efficiency of gear, gear-driven efficiency is made to be lower, while also bringing along broken teeth
Risk.And when tooth high mode ratio K1 be 5 when, then can improve gear-driven strike note, also take into account guarantee the strength of gear teeth and compared with
High transmission efficiency.
In the present embodiment, specific U-type groove structure 1 includes the first arc sections 2 and symmetrically arranged and respectively with first
Connected the second arc sections of a pair 3 in the both ends of arc sections 2, the corresponding diameter of a circle of the second arc sections 3 herein are greater than the first circle
The corresponding diameter of a circle of arc portion 2.The symmetry axis of a pair of symmetrically arranged second arc sections 3 is the tooth space centerline of the gear teeth.
It should be strongly noted that in U-type groove structure 1 in the present embodiment, the second arc sections 3 and 2 phase of the first arc sections
It cuts, and the point of contact of the second arc sections 3 and the tangent formation of the first arc sections 2 is between the second arc sections 3 and the first arc sections 2
Tie point.And second arc sections 3 and involute profile 4 it is tangent, and the second arc sections 3 and the tangent formation of involute profile 4
Point of contact is the tie point between the second arc sections 3 and involute profile 4.
Supplementary explanation is needed herein, is frequently necessary to circular arc when drawing parts figure and is glossily connected circular arc or straight line,
This method that adjacent two line segment is glossily connected with circular arc, referred to as circular sliding slopes (also cry and be smoothly connected).Circular sliding slopes, essence
Upper is exactly that circular arc and straight line or circular arc and circular arc are tangent, and point of contact is tie point.The mode of circular sliding slopes compares circular arc and circle
During arc or circular arc are connected with straight line, the structure that " inflection point " of intersection is formed between two connected parts is come
It says, can obviously avoid the stress concentration phenomenon in " inflection point " of intersection.
Therefore, for the present embodiment design between the second arc sections 3 and the first arc sections 2 and the second arc sections 3
The mode of the tangent circular sliding slopes of tie point between involute profile 4, not only can locally answer to avoid tooth force process
Power concentrates the risk for leading to broken teeth, it is often more important that the tooth form that gear can be made loaded becomes uniformly, can absorb more impacts and carries
Lotus improves the registration of gear engagement, improves the strength of gear teeth, makes an uproar to extend the service life of gear while reduce the operation of gear
Sound.
It should also be noted that, for the two-wheeled gear teeth in engagement process, and not all flank profil is all worked, and be
It is limited to one section of flank profil from tooth top to tooth root to participate in engaging, referred to as flank profil active section, and that section of the first arc sections 2 of tooth root
Flank profil is not involved in engagement, referred to as flank profil inoperative section.
It please refers to shown in Fig. 2, the specific forming process of the second arc sections 3 is as follows:
By tangent line cor-responding identified theorems: if a straight line has intersection point with a circle, and the straight line for connecting intersection point and the center of circle hangs down with the straight line
Directly, then this straight line is exactly round tangent line.
Straight line a is the common tangent of the second arc sections 3 and the tie point of involute profile 4；
Straight line b is the common tangent of the tie point of the first arc sections 2 and the second arc sections 3；
Straight line c was the tie point of the second arc sections 3 and involute profile 4 and perpendicular to the straight line of straight line a；
Straight line d was the tie point of the first arc sections 2 and involute profile 4 and perpendicular to the straight line of straight line b；
Circle e is using the intersection point of straight line a and straight line b as the center of circle, and radius was the company of the second arc sections 3 and involute profile 4
The circle or radius of contact were the circle of the tie point of the first arc sections 2 and the second arc sections 3；And the second arc sections 3 are on circle e
One section of circular arc.
It should be noted that please referring to shown in Fig. 3, the high calculation formula of the full-height tooth gear teeth are as follows: h=m (2ha*+c*),
In, ha* is addendum coefficient, and c* is top coefficient.China defines standard value to addendum coefficient ha* and top coefficient c*.
Orthodont system: ha*=1, c*=0.25；Short tooth system: ha*=0.8, c*=0.3；Fine module gear (m < 1): c*=0.35, because
H=m (2ha*+c*), so (2ha*+c*)=h/m, if tooth high mode ratio (2ha*+c*)=h/m=K, passes through above-mentioned height of teeth top
Coefficient h a* and top coefficient c* value, can be calculated the tooth high mode K of the gear teeth of master gear range be 1.85~
2.35。
It please refers to shown in Fig. 4, the gear of the present embodiment considers profile modified gear, tooth high mode ratio K1=h1/m.The high h1=of tooth
(da-df1)/2；Wherein outside circle is da=df1+2h1=m (z+2h1*+2x)；Root circle is df1, and df1 is with gear centre
For dot and the diameter of a circle circumscribed with the first arc sections 2；X is the modification coefficient of profile modified gear.The gear teeth in the present embodiment
Tooth high mode ratio K1 is preferably 5.By long addendum tooth height, tooth height increases the amount of deflection and flexible deformation that can increase the gear teeth, makes gear
Strike note reduce.Motor when impingement phenomenon occurs for gear tooth in starting, commutation or operational process, increase in bullet by tooth height
Property deformation under the action of, can be absorbed portion of energy, the risk of tooth root broken teeth can also be reduced simultaneously by reducing gear rattle sound, can be prolonged
The spool gear service life.Tooth height increases height, so that gear teeth elasticity and amount of deflection increase, can reduce by part processing precision and assembler
The risk that skill error causes motor stuck, while being also conducive to the reduction gear box electric motor starting that there is starting dead point.
It for the radius r1 of the corresponding circle of the first arc sections 2 of the present embodiment, please refers to shown in Fig. 5, point A, point B are basic circle
The starting point of upper tooth socket two sides involute profile 4, according to the property of involute, any one point method line certainty and basic circle on involute
It is tangent.Point O be the basic circle center of circle, therefore line segment OA at point A with it is tangent as the involute of starting point using point A.Point C is in arc AB
Point crosses point O and point C and makees a center line L1.Df1 is root diameter, and point 01 is the center of circle of the corresponding circle of the first arc sections 2,
Point 01 is located on center line L1, and the first arc sections 2 and root circle are circumscribed, and tangent with line segment OA, and point of contact is point E.Point D is
Cross the normal that point C is straight line 0A, the intersection point with straight line OA；
If the radius of the first arc sections 2 is r1, then r1=01E.Seek the value of r1.If η b is basic circle apace width half angle.
Seen from the above description, △ 0DC and △ 0E01 is similar triangles, CD ⊥ 0D, O1E ⊥ 0E, according to similar triangle
The proportional property theorem of shape corresponding sides, obtains:
OO1/OC=O1E/CD--- formula (1)
∵ OC=db/2--- formula (2)
OO1=df1/2+O1E--- formula (3)
CD=OC*sin η b=db*sin η b--- formula (4)
∵ h1=mk1=(da-df1)/2 again
∴ df1=da-2mk1--- formula (5)
Known to condition r1=01E--- formula (6)
By formula (2)/(3)/(4)/(5)/(6), formula (1) is brought into, it can be deduced that:
R1=(da-2mk1) sin η b/2 (1-sin η b) --- formula (7)
Geometrical Parametrs for Involute Spur Cylindrical Gear and fundamental formular are as follows:
Bringing straight spur gear parameter equation into formula 7 can obtain:
Second arc sections 3 and involute profile 4 of the present embodiment are tangent, and point of contact is tie point, and tie point is preferably in base
On circle.Since second arc sections 3 and involute profile 4 of the present embodiment are tangent, at the same the second arc sections 3 also with the first circular arc
Portion 2 is tangent.According to mapping principle, in the case where guarantee tooth high h1, the radius r1 of the first arc sections 2:
Design requirement can be met.Because commonly using the minimum 0.03mm of diameter of wire cutting molybdenum filament in the market, so most narrow
Cleavable radius is the circular arc of 0.035mm.So the minimum value of the r1 of the present embodiment should be greater than 0.035mm.
So the value range of r1 is:
For convenience of design value, the preferred design value for the tooth fillet radius r1 that the present embodiment provides:
Embodiment 2:
On the basis of the gear of embodiment 1, the gear general configuration phase of gear provided in this embodiment and embodiment 1
Together, difference is that the U-type groove structure 1 of the gear of the present embodiment includes the first arc sections 2 and symmetrically arranged and respectively with first
Connected a pair of of the straightway in the both ends of arc sections 2；Circular sliding slopes are used at first arc sections 2 and the tie point of straightway；And
Circular sliding slopes are used at the tie point of straightway and involute profile 4.
It also needs to aid in illustrating herein, circular arc is frequently necessary to when drawing parts figure and glossily connects circular arc or straight
Line, this method that adjacent two line segment is glossily connected with circular arc, referred to as circular sliding slopes (being smoothly connected).Circular sliding slopes are (smooth
Connection), it is exactly substantially that circular arc and straight line or circular arc and circular arc are tangent, and point of contact is tie point.Therefore, for the present embodiment
In straightway and the first arc sections 2 between and straightway and involute profile 4 between similarly may be used using circular sliding slopes
To avoid " inflection point " problem of the intersection between above-mentioned component, so that tooth force process stress raisers be avoided to cause
The risk of broken teeth.
Embodiment 3:
Referring Fig. 6 to Figure 10, on the basis of the gear of embodiment 1 or embodiment 2, one is present embodiments provided
Kind reduction gear box motor, the primary driven transmission wheel wheel piece of the reduction gear box motor of the present embodiment is using embodiment 1 or in fact
The gear of example 2 is applied, gear is manufactured using Shooting Technique, and the primary driven transmission wheel wheel piece 7 and primary transmission in the present embodiment are led
Driving wheel 8 engages.
According to the technical solution of the present embodiment, tooth high mode ratio K1 is adjusted so that K1 range be 3~6.8,
It verifies and implements in the primary driven transmission wheel wheel on piece of synchronous motor, referring specifically to shown in following table, the model of K1 is worked as in test discovery
It encloses and is able to satisfy life of product and noise requirements when being 3~6.8, and be greatly improved to gearing noise is reduced.The present embodiment
Why the primary driven transmission wheel wheel piece of synchronous motor is tested, is the primary driving cog because of reduction gear box motor
The revolving speed highest of wheel, the corresponding gear noise of revolving speed highest are also the largest, so, the present embodiment passes through this implementation of experimental observation
The range of example design tooth high mode ratio K1 influences the noise reduction of primary driven transmission wheel wheel piece.
Specifically, high by the tooth for increasing gear, high the increasing of tooth can increase the amount of deflection and flexible deformation of the gear teeth, make tooth
Strike note between wheel reduces.For motor when impingement phenomenon occurs for the gear teeth of gear in starting, commutation or operational process, tooth is high
Increase under the action of flexible deformation, portion of energy can be absorbed, tooth root broken teeth can also be reduced simultaneously by reducing gear rattle sound
Risk, to extend gear life.In addition, tooth height increases height, gear teeth elasticity and amount of deflection are increased, can be reduced by zero
The risk that part machining accuracy and assembly technology error cause motor stuck, while being also conducive to the reduction gear box that there is starting dead point
Electric motor starting.
Above specific embodiment has carried out further specifically the purpose of the present invention, technical scheme and beneficial effects
It is bright, it should be understood that be not intended to restrict the invention the above is only specific embodiments of the present invention, it is all in the present invention
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done, should be included in protection scope of the present invention it
It is interior.
In the description of the present invention, it is to be understood that, indicating position or the term of positional relationship are based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the equipment of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be on or below second feature
Directly contacted including the first and second features, also may include the first and second features be not direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature second spy
Right above sign and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature second feature it
Under, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of first feature horizontal height
Less than second feature.
Claims (8)
1. a kind of gear characterized by comprising multiple gear teeth successively to connect；The root portion of the gear teeth is U-type groove structure
(1), involute profile (4) and between the tooth top trace (5) and root portion of the gear teeth are equipped with；
The tooth high mode ratio K1=h1/m of the gear teeth；Wherein h1 is that tooth is high；M is modulus；K1=3~6.8.
2. gear according to claim 1, which is characterized in that the U-type groove structure (1) include the first arc sections (2) and
The second arc sections of a pair (3) that are symmetrically arranged and being connected respectively with the both ends of first arc sections (2)；
The symmetry axis of a pair of second arc sections (3) is the tooth space centerline of the gear teeth；
Second arc sections (3) and the first arc sections (2) are tangent, and the second arc sections (3) and the first arc sections (2) tangent shape
At point of contact be tie point between the second arc sections (3) and the first arc sections (2)；And
Second arc sections (3) and the involute profile (4) are tangent, and the second arc sections (3) and involute profile (4) phase
Cutting the point of contact to be formed is the tie point between the second arc sections (3) and involute profile (4).
3. gear according to claim 2, which is characterized in that the corresponding diameter of a circle of second arc sections (3) is greater than
The corresponding diameter of a circle of first arc sections (2).
4. gear according to claim 1, which is characterized in that the U-type groove structure (1) include the first arc sections (2) and
A pair of of straightway that is symmetrically arranged and being connected respectively with the both ends of first arc sections (2)；
Circular sliding slopes are used at the tie point of first arc sections (2) and straightway；And
Circular sliding slopes are used at the straightway and the tie point of involute profile (4).
5. gear according to claim 1, which is characterized in that the tooth high mode ratio K1 is 5.
6. according to the described in any item gears of claim 2~5, which is characterized in that the high h1=of tooth (da-df1)/2；Wherein
Outside circle is da=df1+2h1=m (z+2h1*+2x)；
Root circle is df1, and df1 is using gear centre as dot and the diameter of a circle circumscribed with the first arc sections (2)；
X is the modification coefficient of profile modified gear.
7. gear according to claim 6, which is characterized in that the radius r1 of the corresponding circle of first arc sections (2):
Wherein
Z is the number of teeth；α is pressure angle on reference circle.
8. a kind of reduction gear box motor, which is characterized in that the primary driven transmission wheel wheel piece of the reduction gear box motor is adopted
With the gear as described in any one of claim 1~7；Gear is manufactured using Shooting Technique.
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| CN201910031822.9A CN109595324A (en) | 2019-01-14 | 2019-01-14 | Reduction gear box motor and its gear |
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| CN103697143A (en) * | 2013-12-13 | 2014-04-02 | 江苏飞船股份有限公司 | Large-tooth high-factor straight-tooth cylindrical gear |
| CN209671558U (en) * | 2019-01-14 | 2019-11-22 | 江苏雷利电机股份有限公司 | Reduction gear box motor and its gear |
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- 2019-01-14 CN CN201910031822.9A patent/CN109595324A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324931B1 (en) * | 2000-04-19 | 2001-12-04 | Dana Corporation | Straight bevel gears with improved tooth root area geometry and method for manufacturing forging die for making thereof |
| CN101182880A (en) * | 2007-12-17 | 2008-05-21 | 宝钢集团苏州冶金机械厂 | Gear wheel with changed tooth height |
| CN101943245A (en) * | 2010-09-07 | 2011-01-12 | 安徽工业大学 | Tooth shape optimization design method for linear-circular arc tooth outline internal engaged cylindrical gear pair |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190409 Address after: 213000 No. 19 Qianjiatang Road, Yaoguan Town, Wujin District, Changzhou City, Jiangsu Province Applicant after: JIANGSU LEILI MOTOR CO., LTD. Address before: 213011 Xinbei Road, Changzhou Xinbei District, Jiangsu, 18 Applicant before: Changzhou Leili Electrical Equipment Co., Ltd. |
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