CN212627511U - Gear protection mechanism of hub motor of electric bicycle - Google Patents
Gear protection mechanism of hub motor of electric bicycle Download PDFInfo
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- CN212627511U CN212627511U CN202021130257.6U CN202021130257U CN212627511U CN 212627511 U CN212627511 U CN 212627511U CN 202021130257 U CN202021130257 U CN 202021130257U CN 212627511 U CN212627511 U CN 212627511U
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Abstract
The utility model discloses an electric bicycle wheel hub motor's gear protection mechanism, there are motor and planetary gear reduction mechanism in the inner space that wheel hub and end cover enclose, outer ring gear among the planetary gear reduction mechanism is located and is equipped with a plurality of biography power tooth on the anchor ring of end cover one side, the cooperation passes the medial surface of power tooth in the end cover and is equipped with the ring circle, the surface of ring circle is equipped with a plurality of atress tooth, outer ring gear cup joints with wheel hub's internal surface activity, the interior disc of biography power tooth cup joints with the surface activity of ring circle, it is equipped with the elastomer to pass between power tooth and the atress tooth, when electric bicycle starts/parks, the elastomer produces the deformation of collapsing, thereby make planetary gear reduction mechanism's gear avoid the impact. The utility model discloses solved wheel hub motor's disconnected tooth trouble effectively, the inertia of rotor is to the impact of gear when starting torque that can slow down the motor and parking, prolongs the cycle life of gear train among the reduction gears by a wide margin.
Description
Technical Field
The utility model relates to an electric bicycle's in-wheel motor technical field, in particular to have gear wheel hub motor that has gear protection mechanism.
Background
The hub motor with gear is a driving motor for an electric bicycle with compact structure and high energy efficiency ratio, and is generally characterized in that a driving motor and a planetary gear reduction mechanism are arranged in an inner space surrounded by a hub and an end cover, wherein the planetary gear reduction mechanism is also combined with a one-way clutch, such as Chinese patents CN03127256.8 and CN201510104597.9 of an outer rotor motor with a through shaft structure, such as US patent US20050176542A1 of an inner rotor motor with a half shaft structure, such as CN201811376287.2 and CN201910757289.4, and is a hub motor with gear in an axial magnetic field, and the planetary gear of the hub motors is generally made of polymer materials such as nylon or polyformaldehyde with good wear resistance and self-lubricating property. When the electric bicycle is started/stopped and accelerated/decelerated, a gear of a deceleration mechanism bears larger impact force, and a planetary gear with lower structural strength has broken teeth, so that the phenomenon is easier to occur in cold winter, and in the north of China, the electric bicycle basically has no application of a gear hub motor, and the electric bicycle conforming to the new national standard still largely adopts a full-disk type low-speed hub motor with low continuous running capability in the market.
Disclosure of Invention
The utility model aims at providing a gear protection mechanism of one-level speed reduction electric bicycle wheel hub motor slows down the impact of the inertia of motor to the gear when motor starting torque and parking, prolongs the life cycle of gear among the reduction gears by a wide margin, makes to have gear wheel hub motor to be applicable to new national standard electric bicycle.
In order to achieve the purpose, the invention provides the following scheme:
the utility model discloses a gear protection mechanism of hub motor of electric bicycle, which comprises a motor and a planetary gear reduction mechanism, wherein the motor and the planetary gear reduction mechanism are positioned in an inner space enclosed by a hub and an end cover, the hub and the end cover are sleeved on a main shaft in a rolling way, and the hub and the end cover are detachably and fixedly connected; the planetary gear speed reducing mechanism comprises a planetary carrier, an outer gear ring, a sun gear ring and a planetary gear, wherein the planetary carrier is provided with a one-way clutch, the sun gear ring is installed on a rotor of the motor, the planetary carrier is fixedly sleeved on the main shaft, the planetary gear is rotatably installed on a fixed shaft of the planetary carrier, and the planetary gear is meshed with the sun gear ring and the outer gear ring; the electric bicycle is characterized by further comprising a plurality of force transmission teeth, force bearing teeth and an elastic body, wherein the force transmission teeth are arranged on a circular ring surface of the outer gear ring on one side of the end cover, a circular ring is arranged on the inner side surface of the end cover in a matched mode, the force bearing teeth are arranged on the outer circular surface of the circular ring, the outer gear ring is movably sleeved with the inner circular surface of the hub, the inner circular surface of the force transmission teeth is movably sleeved with the outer circular surface of the circular ring, the elastic body is arranged between the force transmission teeth and the force bearing teeth, power of the motor acts on the elastic body through the planetary gear speed reducing mechanism and is further transmitted to the end cover and the hub, and when the electric bicycle is started/stopped, the elastic body generates collapsing deformation, so that gears of the planetary gear speed reducing mechanism.
Preferably, the force transmission teeth and the outer gear ring are of an integral structure, and the circular ring, the force bearing teeth and the end cover are of an integral structure.
Preferably, the elastomer is a steel spring or a rubber strip.
Preferably, the inner surface of the hub is provided with a retaining ring, and the retaining ring is a positioning backer of the outer gear ring.
Preferably, the planetary gear reduction mechanism is a one-stage reduction mechanism.
The utility model discloses for prior art gain following technological effect:
the technical scheme of the utility model, pass the power tooth the ring circle with the atress tooth is rather than the integrative compression molding of continuous body, though the cost slightly increases, has solved wheel hub motor's disconnected tooth trouble effectively, make full use of wheel hub's inner space, planetary gear reduction mechanism's reduction ratio obtains abundant assurance, and the moment of torsion bearing capacity improves by a wide margin, makes and has geared hub motor can be fit for new national standard electric bicycle's requirement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a first-stage reduction hub motor according to the present embodiment;
FIG. 2 is a schematic view of the gear protection mechanism of the present embodiment;
fig. 3 is a schematic structural view of the hub according to the embodiment.
Detailed Description
The invention aims to provide a gear protection mechanism of a hub motor of an electric bicycle, which can greatly reduce the tooth breakage phenomenon of a planetary gear speed reducing mechanism, particularly a planetary gear of the planetary gear speed reducing mechanism and improve the popularization rate of the hub motor of the speed reducing mechanism. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, the gear protection mechanism of the hub motor of the electric bicycle in the present embodiment includes a motor 1 and a planetary gear reduction mechanism 2, the motor 1 and the planetary gear reduction mechanism 2 are located in an internal space enclosed by a hub 3 and an end cover 4, the hub 3 and the end cover 4 are sleeved on a main shaft 5 in a rolling manner, and the hub 3 and the end cover 4 are detachably and fixedly connected; the planetary gear speed reducing mechanism 1 comprises a planet carrier 6, an outer gear ring 7, a sun gear ring 8 and a planetary gear 9, the planet carrier 6 is provided with a one-way clutch, the sun gear ring 8 is installed on a rotor 10 of the motor 1, the planet carrier 6 is fixedly sleeved on the main shaft 5, the planetary gear 9 is rotatably installed on a fixed shaft 11 of the planet carrier 6, and the planetary gear 9 is meshed with the sun gear ring 8 and the outer gear ring 7.
The power transmission device also comprises a plurality of force transmission teeth 12, force bearing teeth 13 and an elastic body 14, wherein the force transmission teeth 12 are arranged on the circular ring surface of the outer gear ring 7 positioned on one side of the end cover 4, a circular ring 15 is arranged on the inner side surface of the end cover 4 in a matching way with the force transmission teeth 12, the force bearing teeth 13 are arranged on the outer circular surface of the circular ring 15, the outer gear ring 7 with the force transmission teeth 12 is movably arranged between the end cover 4 and the hub 3, the outer circular surface of the outer gear ring 7 is movably sleeved with the inner circular surface of the hub 3, the inner circular surface of the force bearing teeth 13 is movably sleeved with the outer circular surface of the circular ring 15, the elastic body 14 is arranged between the force transmission teeth 12 and the force bearing, and further to the end cap 4 and further to the hub 3, when the electric bicycle is started/stopped, the elastic body 14 is deformed by collapse, and the gears of the planetary gear speed reduction mechanism 2 are prevented from being damaged by the impact.
In the embodiment, the force transmission teeth 12 and the outer gear ring 7 are of an integral structure, the circular ring 15 and the stress teeth 13 are of an integral structure with the end cover, the force transmission teeth 12, the circular ring 15 and the stress teeth 13 are integrally molded with the outer gear ring 7 and the end cover 4, the outer gear ring 7 and the hub 3 are assembled to form a plurality of accommodating cavities 16, and the elastic bodies 14 with the functions of collapsing and energy absorption are installed in the accommodating cavities 16.
The elastic body 14 is a steel spring or a rubber strip, and in order to prevent the axial movement of the external gear ring 7, the inner circular surface of the hub 3 is further provided with a retaining ring 17, the retaining ring 17 is integrally formed with the hub 1, and the external gear ring 7 is limited between the retaining ring 17 and the end cover 4, as shown in fig. 2.
In this embodiment, the planetary gear reduction mechanism 2 is a one-stage reduction, and the force transmission teeth 12 are arranged on the circular ring surface of the outer gear ring 7 on one side of the end cover 4, so that the reduction ratio of the reduction mechanism can be ensured to the greatest extent.
Be applied to the geared hub motor that has of one-level speed reduction on light-duty electric bicycle in a large number, outer ring gear 7 and sun gear ring gear 8 among the planetary gear reduction gears generally adopt SMC material mould pressing sintering shaping, planetary gear 9 mainly adopts two kinds of material compression molding or machine-shaping of PA and POM, the geared hub motor that has of this kind of structural style, the moment of torsion bearing capacity consequently limits, when starting/parking, planetary gear 9 can take the lead to the emergence disconnected tooth, especially when the scram in winter, disconnected tooth trouble is changeed and takes place. For the inspection the utility model discloses an validity, experiment model machine adopt duplex planetary gear, and its tooth height is set for and is less than commercially available motor, installs on the electric bicycle who accords with new national standard, through the test more than a year, and the effect is very ideal, has realized the utility model discloses a purpose.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (4)
1. A gear protection mechanism of a hub motor of an electric bicycle comprises a motor and a planetary gear reduction mechanism, wherein the motor and the planetary gear reduction mechanism are positioned in an internal space enclosed by a hub and an end cover; planetary gear reduction unit includes planet carrier, outer ring gear, sun gear ring gear and planetary gear, the planet carrier has one way clutch, the sun gear ring gear is installed on the rotor of motor, the fixed cover of planet carrier is established on the main shaft, planetary gear rotates and installs on the dead axle of planet carrier, planetary gear with sun gear ring gear with outer ring gear meshing, its characterized in that: the elastic body is arranged between the force transmission teeth and the force receiving teeth, the power of the motor is acted on the elastic body by the planetary gear speed reducing mechanism and then is transmitted to the end cover and the hub, and when the electric bicycle is started/stopped, the elastic body generates collapse deformation, so that the gear of the planetary gear speed reducing mechanism is prevented from being damaged by impact.
2. The gear protection mechanism for hub motor of electric bicycle according to claim 1, wherein: the elastic body is a steel spring or a rubber strip.
3. The gear protection mechanism for hub motor of electric bicycle according to claim 1, wherein: and a retainer ring is arranged on the inner surface of the hub and is a positioning backer of the outer gear ring.
4. The gear protection mechanism for hub motor of electric bicycle according to claim 1, wherein: the planetary gear speed reducing mechanism is a primary speed reducing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021130257.6U CN212627511U (en) | 2020-06-18 | 2020-06-18 | Gear protection mechanism of hub motor of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021130257.6U CN212627511U (en) | 2020-06-18 | 2020-06-18 | Gear protection mechanism of hub motor of electric bicycle |
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| Publication Number | Publication Date |
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| CN212627511U true CN212627511U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021130257.6U Active CN212627511U (en) | 2020-06-18 | 2020-06-18 | Gear protection mechanism of hub motor of electric bicycle |
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| CN (1) | CN212627511U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11993343B1 (en) | 2023-05-22 | 2024-05-28 | Da Shiang Technology Co., Ltd. | Transmission structure of hub motor |
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2020
- 2020-06-18 CN CN202021130257.6U patent/CN212627511U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11993343B1 (en) | 2023-05-22 | 2024-05-28 | Da Shiang Technology Co., Ltd. | Transmission structure of hub motor |
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