CN208417447U - A kind of transmission gear - Google Patents
A kind of transmission gear Download PDFInfo
- Publication number
- CN208417447U CN208417447U CN201820791102.3U CN201820791102U CN208417447U CN 208417447 U CN208417447 U CN 208417447U CN 201820791102 U CN201820791102 U CN 201820791102U CN 208417447 U CN208417447 U CN 208417447U
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- gear
- quoit
- transmission gear
- plastic
- wheel rim
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Abstract
The utility model discloses a kind of transmission gears, it includes the plastic gear and quoit of coaxial arrangement, the plastic gear is roller gear, the plastic gear includes wheel rim and the gear teeth positioned at the wheel rim periphery, the wheel rim is molded into a single integrated structure with the gear teeth, the wheel rim is formed with centre bore, and the centre bore and the wheel rim are coaxial, and the quoit is fixedly connected in the centre bore.The transmission gear of the utility model, intensity is high, light weight.
Description
Technical field
The utility model relates to technical field of motors more particularly to a kind of transmission gears.
Background technique
In recent years, electric vehicle has gradually been received by the majority of consumers as a kind of environmental protection, the energy-efficient vehicles, nothing
By still foreign countries, the sales volume of electric vehicle worldwide are also increasing year by year at home, electric vehicle substitutes the trend of bicycle
Gradually expand, and core component of the electric vehicle hub driving device as electric vehicle, the quality of quality often decide electronic
The superiority and inferiority of vehicle entirety.
The existing small hyper tape gear hub motor of bicycle generallys use NGW type planet-gear speed reducer or NW type planet tooth
Speed reducer is taken turns, double-planetary gear is kept fixed in NW type planetary gear transmission mechanism；In NGW type planetary gear transmission mechanism, when
When rotor actively exports, sun gear rotation is driven, so that double-planetary gear be driven to rotate.
Currently, transmission gear generally uses pure plastic gear or pure metal gear, pure plastic gear is in engaged transmission process
In, intensity is lower, and transmission accuracy is low, and pure metal gear weight is larger.
Utility model content
In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a kind of transmission gears, and intensity is high, quality
Gently.
In order to solve the technical problem in background technique, the utility model provides a kind of transmission gear, including coaxial arrangement
Plastic gear and quoit, the plastic gear be roller gear,
The plastic gear includes wheel rim and the gear teeth positioned at the wheel rim periphery, and the wheel rim and gear teeth injection molding are integral
Structure, the wheel rim are formed with centre bore, and the centre bore and the wheel rim are coaxial, and the quoit is fixedly connected in described
In heart hole.
Further, multiple convex ribs, the length direction of the convex ribs are evenly distributed on the outer circumference surface of the quoit
It is consistent with the axial direction of the quoit.
Further, multiple convex ribs arranged at equal intervals or adjacent convex ribs interconnect.
Further, the inner peripheral surface of the plastic gear offers annular groove, and the outer circumference surface of the quoit is provided with
Ring rib, the ring rib are sticked in the annular groove.
Further, the width of the quoit is less than the width of the plastic gear.
Further, the quoit and the plastic gear are interference fitted.
Further, the quoit is molded into a single integrated structure with the plastic gear；Or,
The quoit is removably embedded in the centre bore.
Further, the transmission gear is sun gear.
Further, the inner ring of the quoit is fixed with rotor engagement, the surrounding of the gear teeth respectively with multiple planets
Wheel engagement.
Further, the quoit includes one of machined piece, metallic sintered products and cold-extruded part or a variety of.
Wherein, the planetary gear engaged with sun gear can be double-planetary gear, and the double-planetary gear includes that planetary gear is big
Wheel and planetary gear steamboat, the planetary gear bull wheel and planetary gear steamboat it is adjacent fitting and be fixedly and coaxially connected, the planetary gear is big
Wheel and planetary gear steamboat are roller gear, and the planetary gear bull wheel is identical with the modulus of planetary gear steamboat,
The planetary gear bull wheel includes bull wheel tooth root and the bull wheel gear teeth, and the planetary gear steamboat includes steamboat tooth root and steamboat
The gear teeth, the height of the bull wheel tooth root are greater than the height of the steamboat tooth root, and the number of teeth of the bull wheel gear teeth is greater than the steamboat
The number of teeth of the gear teeth.
The beneficial effects of the utility model are:
(1) transmission gear of the utility model comprising the plastic gear and quoit of coaxial arrangement are moulded with directlying adopt
The transmission gear of material gear is compared, and the utility model uses metal insert in the centre bore of plastic gear, and entire gear can be improved
Intensity, and then extend the service life of transmission gear.
(2) transmission gear of the utility model comprising the plastic gear and quoit of coaxial arrangement are pure with directlying adopt
The transmission gear of metal gear is compared, and the utility model uses metal insert in the centre bore of plastic gear, can reduce entire tooth
The weight of wheel.
(3) transmission gear of the utility model is evenly distributed with multiple convex ribs on the outer circumference surface of the quoit,
The length direction of the convex ribs is consistent with the axial direction of the quoit, prevents circumference after injection made gear stress from skidding.This reality
Inner peripheral surface with novel transmission gear in plastic gear offers annular groove, and convex annular is arranged in the outer circumference surface of quoit
Item can prevent axial float after plastic gear stress by the way that the ring rib to be sticked in the annular groove.
Detailed description of the invention
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the transmission gear of the utility model；
Fig. 2 is the structural schematic diagram of the transmission gear of the utility model in one embodiment；
Fig. 3 is the structural schematic diagram of the transmission gear of the utility model in another embodiment；
Fig. 4 is the structural schematic diagram of the transmission gear of the utility model in a further embodiment；
Fig. 5 is the structural schematic diagram of the double-planetary gear of the utility model；
Fig. 6 is the schematic cross-sectional view of Fig. 5；
Fig. 7 is the structural schematic diagram of the double-planetary gear of the utility model in another embodiment.
Wherein, 101- plastic gear, 1011- wheel rim, the 1012- gear teeth, 1013- annular groove, 102- quoit, 1021- convex ribs,
1022- ring rib, 103- centre bore, 1- double-planetary gear, 11- planetary gear bull wheel, 12- planetary gear steamboat, the big gear teeth of 111-
Root, the 112- bull wheel gear teeth, 121- steamboat tooth root, 122- bull wheel tooth root, 2- gear hole, 113- bull wheel groove, 123- steamboat groove,
3- bearing fixed column.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the present invention, it should be understood that term " on ", "lower", "top", "bottom", "inner", "outside" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore should not be understood as limiting the present invention.The meaning of " multiple " in the description of the present invention,
It is two or more, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, can make to be fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can make to be connected directly, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of the transmission gear of the utility model.As shown in Figure 1, shown driving cog
Wheel includes the plastic gear 101 and quoit 102 of coaxial arrangement, and the plastic gear 101 is roller gear.
The plastic gear 101 includes wheel rim 1011 and the gear teeth 1012 positioned at 1011 periphery of wheel rim, the wheel rim
1011 are molded into a single integrated structure with the gear teeth 1012, and the wheel rim 1011 is formed with centre bore 103, the centre bore 103 with it is described
Wheel rim 1011 is coaxial, and the quoit 102 is fixedly connected in the centre bore 103.The quoit 102 includes machining
One of part, metallic sintered products and cold-extruded part are a variety of.
The plastic gear and quoit of the utility model coaxial arrangement, with the transmission gear phase for directlying adopt plastic gear
Than the utility model uses metal insert in the centre bore of plastic gear, the intensity of entire gear can be improved, and then extend biography
The service life of moving gear；Compared with the transmission gear for directlying adopt pure metal gear, the utility model is in plastic gear
Heart hole uses metal insert, can reduce the weight of entire gear.
Since the hardness of plastic gear is softer compared with the hardness of quoit, quoit 102 described in the utility model and the modeling
Expect that gear 101 is interference fitted, under the premise of not damaging plastic gear, ensure that the secured connection of quoit and plastic gear.
In one embodiment, the quoit 102 can also be molded into a single integrated structure with the plastic gear 101.
In another embodiment, the quoit 102 is removably embedded in the centre bore 103.
Inner ring and the rotor engagement press fitting of the quoit 102 are fixed.
In one embodiment, the transmission gear be sun gear, the surrounding of the sun gear gear teeth 1012 respectively with multiple rows
Star-wheel engagement, planetary gear can be double-planetary gear.
It should be noted that the transmission gear of the utility model is not limited solely to sun gear.
Embodiment 2
Referring to Fig. 2, Fig. 2 is the structural schematic diagram of the transmission gear of the utility model in one embodiment.Such as Fig. 2 institute
Show, multiple convex ribs 1021, the length direction of the convex ribs 1021 and institute are evenly distributed on the outer circumference surface of the quoit 102
The axial direction for stating quoit 102 is consistent.The transmission gear of the utility model, on the outer circumference surface of the quoit 102
Multiple convex ribs 1021 are evenly distributed with, can prevent circumference after injection made gear stress from skidding.It is cut along 102 radial direction of quoit
In the cross section that face is formed, the shape of the convex ribs 1021 is arc-shaped.In one embodiment, multiple convex ribs 1021 are at equal intervals
Arrangement.In one embodiment, adjacent convex ribs 1021 interconnect.
Embodiment 3
Referring to Fig. 3, Fig. 3 is the structural schematic diagram of the transmission gear of the utility model in another embodiment.Such as Fig. 3
Shown, the inner peripheral surface of the plastic gear 101 offers annular groove 1013, and the outer circumference surface of the quoit 102 is provided with ring
Shape raised line 1022, the ring rib 1022 are sticked in the annular groove 1013.The transmission gear of the utility model is in plastic teeth
The inner peripheral surface of wheel 101 offers annular groove 1013, ring rib 1022 is arranged in the outer circumference surface of quoit 102, by by institute
It states ring rib 1022 to be sticked in the annular groove 1013, axial float after plastic gear stress can be prevented.
Referring to Fig. 4, in one embodiment, the width of the quoit 102 is less than the width of the plastic gear 101
Degree, can be improved 102 fixed fastness performance of quoit, to improve the fixed effect of entire gear.
Embodiment 4
Fig. 5 and Fig. 6 are please referred to, Fig. 5 is the structural schematic diagram of the double-planetary gear of the utility model；Fig. 6 is the section view of Fig. 5
Schematic diagram.As shown in Figure 5 and Figure 6, the double-planetary gear 1 includes planetary gear bull wheel 11 and planetary gear steamboat 12, the planet
It takes turns bull wheel 11 and the adjacent fitting of planetary gear steamboat 12 and is fixedly and coaxially connected, the planetary gear bull wheel 11 and planetary gear steamboat 12 are equal
For roller gear.
The planetary gear bull wheel 11 includes bull wheel tooth root 111 and the bull wheel gear teeth 112, and the planetary gear steamboat 12 includes steamboat
Tooth root 121 and the steamboat gear teeth 122, the height of the bull wheel tooth root 111 are greater than the height of the steamboat tooth root 121, the bull wheel
The number of teeth of the gear teeth 112 is greater than the number of teeth of the steamboat gear teeth 122.
The modulus of the planetary gear bull wheel 11 is 0.6-2.0mm, and the modulus of the planetary gear steamboat 12 is 0.6-2.0mm,
Preferably, the modulus of the planetary gear bull wheel 11 and planetary gear steamboat 12 is 1.4mm.The double-planetary gear of the utility model,
Its modulus being arranged and the number of teeth, may make the radial dimension of planetary gear to reduce, so that the diameter of double-planetary gear is small, volume
It is small, it is light-weight, be conducive to the miniaturization of small high-speed hub motor.
Further, the pressure angle of the planetary gear bull wheel 11 is 10 ° -30 °, and the pressure angle of the planetary gear steamboat 12 is
10°-30°.Preferably, the pressure angle of the planetary gear bull wheel 11 and planetary gear steamboat 12 is 20 °.In gear engaged transmission mistake
Cheng Zhong, pressure angle can not all do work in the tangential component of the normal direction of gear generation radial component and reference circle, radial component,
And be it is destructive, the tangential component of only reference circle is only for transmitting torque and does work, and the utility model is guaranteeing
Under the premise of gear bending strength, 20 ° are set by pressure angle, radial component is enabled to reduce, to be used in acting
Power is more, few for the loss of power.
The number of teeth of the bull wheel gear teeth 112 is 7-50, and the number of teeth of the steamboat gear teeth 122 is 7-50, it is preferable that institute
The number of teeth for stating the bull wheel gear teeth 112 is 16, and the number of teeth of the steamboat gear teeth 122 is 10.In transmission process, by using this
The stationarity of transmission can be improved in the number of teeth of utility model, reduces impact vibration.
The root diameter of the bull wheel tooth root 111 is greater than the tip diameter of the planetary gear steamboat 12.
The facewidth w1 of the steamboat gear teeth 122 is greater than the facewidth w2 of the bull wheel gear teeth 112.
The tooth pitch of the steamboat gear teeth 122 is greater than the tooth pitch of the bull wheel gear teeth 112.
The planetary gear bull wheel 11 and the planetary gear steamboat 12 are structure as a whole；Or interference fit.
In this embodiment, the axial direction of the planetary gear bull wheel 11 and the planetary gear steamboat 12 offers gear hole 2,
And the gear hole 2 of the planetary gear bull wheel 11 and 2 direction of gear hole of the planetary gear steamboat 12 are consistent and interconnected.
Embodiment 5
Referring to Fig. 7, Fig. 7 is the structural schematic diagram of the double-planetary gear of the utility model in another embodiment.Such as
Shown in Fig. 7, in this embodiment, the planetary gear bull wheel 11 and the planetary gear steamboat 12 are solid gear.From described big
The centre of the outer end face of wheel tooth root 111 and steamboat tooth root 121 is outward extended with bearing fixed column 3 along axial direction respectively, passes through
Double-planetary gear 1 is fixed on the inside of the bearing of planet carrier by the bearing fixed column 3.
The beneficial effects of the utility model are:
(1) transmission gear of the utility model comprising the plastic gear and quoit of coaxial arrangement are moulded with directlying adopt
The transmission gear of material gear is compared, and the utility model uses metal insert in the centre bore of plastic gear, and entire gear can be improved
Intensity, and then extend the service life of transmission gear.
(2) transmission gear of the utility model comprising the plastic gear and quoit of coaxial arrangement are pure with directlying adopt
The transmission gear of metal gear is compared, and the utility model uses metal insert in the centre bore of plastic gear, can reduce entire tooth
The weight of wheel.
(3) transmission gear of the utility model is evenly distributed with multiple convex ribs on the outer circumference surface of the quoit,
The length direction of the convex ribs is consistent with the axial direction of the quoit, prevents circumference after injection made gear stress from skidding.This reality
Inner peripheral surface with novel transmission gear in plastic gear offers annular groove, and convex annular is arranged in the outer circumference surface of quoit
Item can prevent axial float after plastic gear stress by the way that the ring rib to be sticked in the annular groove.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means particular features, structures, materials, or characteristics described in conjunction with this embodiment or example
It is contained at least one embodiment or example of the utility model.In the present specification, schematic expression of the above terms
It need not be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can will be in this specification
The different embodiments or examples of description are engaged and are combined.
The above is preferred embodiments of the present invention, it should be noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (10)
1. a kind of transmission gear, it is characterised in that: plastic gear (101) and quoit (102) including coaxial arrangement, the modeling
Expect that gear (101) are roller gear,
The plastic gear (101) include wheel rim (1011) and be located at the wheel rim (1011) periphery the gear teeth (1012), it is described
Wheel rim (1011) and the gear teeth (1012) injection molding are into a single integrated structure, and the wheel rim (1011) is formed with centre bore (103), the center
Coaxially, the quoit (102) is fixedly connected in the centre bore (103) for hole (103) and the wheel rim (1011).
2. transmission gear according to claim 1, which is characterized in that on the outer circumference surface of the quoit (102) uniformly
It is distributed with multiple convex ribs (1021), the length direction of the convex ribs (1021) is consistent with the axial direction of the quoit (102).
3. transmission gear according to claim 2, which is characterized in that multiple convex ribs (1021) arranged at equal intervals；Or,
Adjacent convex ribs (1021) interconnect.
4. transmission gear according to claim 1, which is characterized in that the inner peripheral surface of the plastic gear (101) opens up
Have annular groove (1013), the outer circumference surface of the quoit (102) is provided with ring rib (1022), the ring rib (1022)
It is sticked in the annular groove (1013).
5. transmission gear according to claim 1, which is characterized in that the width of the quoit (102) is less than the modeling
Expect the width of gear (101).
6. transmission gear according to claim 1, which is characterized in that
The quoit (102) and the plastic gear (101) are interference fitted.
7. transmission gear according to claim 1, which is characterized in that
The quoit (102) is molded into a single integrated structure with the plastic gear (101)；Or,
The quoit (102) is removably embedded in the centre bore (103).
8. transmission gear according to claim 1, which is characterized in that the transmission gear is sun gear.
9. transmission gear according to claim 8, which is characterized in that
The inner ring of the quoit (102) is fixed with rotor engagement, the surrounding of the gear teeth (1012) respectively with multiple planetary gears
Engagement.
10. transmission gear according to claim 1, which is characterized in that
The quoit (102) includes one of machined piece, metallic sintered products and cold-extruded part or a variety of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820791102.3U CN208417447U (en) | 2018-05-25 | 2018-05-25 | A kind of transmission gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820791102.3U CN208417447U (en) | 2018-05-25 | 2018-05-25 | A kind of transmission gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208417447U true CN208417447U (en) | 2019-01-22 |
Family
ID=65112303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820791102.3U Active CN208417447U (en) | 2018-05-25 | 2018-05-25 | A kind of transmission gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208417447U (en) |
-
2018
- 2018-05-25 CN CN201820791102.3U patent/CN208417447U/en active Active
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