CN213402721U - A gear protection mechanism for in-wheel motor - Google Patents
A gear protection mechanism for in-wheel motor Download PDFInfo
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- CN213402721U CN213402721U CN202021283379.9U CN202021283379U CN213402721U CN 213402721 U CN213402721 U CN 213402721U CN 202021283379 U CN202021283379 U CN 202021283379U CN 213402721 U CN213402721 U CN 213402721U
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Abstract
本实用新型公开了一种轮毂电机的齿轮保护机构，轮毂和端盖围成的内部空间内有电机和行星齿轮减速机构，行星齿轮减速机构中外齿圈的外表面上设有若干个传力齿，轮毂的内表面或端盖的内内里面上设有若干个受力齿，传力齿的外圆面与轮毂的内表面活动套接，受力齿的内圆面与外齿圈的外表面活动套接，传力齿和受力齿之间设有弹性体，电动自行车起动/停车时，弹性体产生溃缩变形，从而使行星齿轮减速机构的齿轮免遭冲击损坏。本实用新型有效地解决了轮毂电机的断齿故障，能减缓电机的起动转矩和停车时转子的转动惯量对齿轮的冲击，大幅延长减速机构中齿轮系的周期寿命。
The utility model discloses a gear protection mechanism for a wheel hub motor. A motor and a planetary gear reduction mechanism are arranged in an inner space enclosed by a wheel hub and an end cover, and a plurality of force transmission teeth are arranged on the outer surface of an outer gear ring in the planetary gear reduction mechanism. , there are several force-bearing teeth on the inner surface of the hub or the inner and outer sides of the end cover, the outer circular surface of the force-transmitting teeth is movably sleeved with the inner surface of the hub, and the inner circular surface of the force-bearing teeth is connected with the outer surface of the outer gear ring. The surface is movable and sleeved, and an elastic body is arranged between the force transmission teeth and the force receiving teeth. When the electric bicycle is started/stopped, the elastic body will be collapsed and deformed, thereby preventing the gears of the planetary gear reduction mechanism from being damaged by impact. The utility model effectively solves the tooth-broken fault of the wheel hub motor, can slow down the impact of the motor's starting torque and the rotor's moment of inertia when parking on the gear, and greatly prolong the cycle life of the gear train in the deceleration mechanism.
Description
Technical Field
The utility model relates to an in-wheel motor's gear protection mechanism belongs to electric bicycle's in-wheel motor technical field.
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 the electric bicycle which accords with the new national standard in the market still largely adopts a full-disc type low-speed hub motor with low continuous running capability.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides an in-wheel motor's gear protection mechanism, the inertia of rotor when starting torque that can slow down the motor and parking is to the impact of gear, prolongs the life cycle of gear train among the reduction gears by a wide margin, improves the application scope who has geared in-wheel motor.
The technical scheme is as follows: in order to solve the technical problem, the gear protection mechanism of the in-wheel motor of the utility model 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 wheel hub and an end cover, the wheel hub and the end cover are sleeved on the main shaft in a rolling manner, and the wheel 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 arranged on a rotor of the motor, the planetary carrier is fixedly sleeved on the main shaft, the planetary gear is rotatably arranged on a fixed shaft of the planetary carrier, the planetary gear is a duplicate gear and is meshed with the sun gear ring and the outer gear ring, the planetary gear speed reducing mechanism also comprises a plurality of force transmission teeth, a plurality of stress teeth and a plurality of elastic bodies, the force transmission teeth are arranged on the outer circular surface of the outer gear ring and are matched with the force transmission teeth, the stress teeth are arranged on the inner circular surface of a hub of the hub motor or the inner side surface of an end cover, the outer circular surface of the force transmission teeth is movably sleeved with the inner surface of the hub, the inner circular surface of the stress teeth is movably sleeved with the outer surface of the outer gear ring, the power of the motor is acted on the elastic body by the planetary gear speed reducing mechanism and then transmitted to the hub, and when the electric bicycle is started/stopped, the elastic body generates collapsing deformation, so that the gear of the planetary gear speed reducing mechanism is prevented from being damaged by impact.
Preferably, the elastic body is a steel spring or a rubber strip.
Preferably, a retaining ring is arranged on the inner side of the hub, and the retaining ring is a positioning backer of the outer gear ring and the elastic body.
Preferably, the force-bearing teeth are fixedly provided with baffle rings.
Has the advantages that: compared with the prior art, the utility model discloses solved the broken tooth trouble of in-wheel motor effectively, the inertia of motor is to the impact of gear when can slowing down the starting torque of motor and parking, prolongs the life cycle of gear train among the reduction gears by a wide margin, improves the application scope that has gear in-wheel motor and the stability of speed reduction in-wheel motor.
Drawings
Fig. 1 is a schematic structural diagram of a two-stage reduction hub motor according to the embodiment.
Fig. 2 is a schematic view of the gear protection mechanism according to the embodiment.
Fig. 3 is a schematic view of a gear protection mechanism with force transmitting teeth on a hub.
Fig. 4 is a schematic view of a gear protection mechanism with force transmitting teeth on the end cap.
Fig. 5 is a schematic structural view of the gear protection mechanism of the present embodiment after a retainer ring is installed.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides a gear protection mechanism for an in-wheel motor, including a wheel hub 1, an end cover 2 and a main shaft 3, the wheel hub 1 and the end cover 2 are sleeved on the main shaft 3 in a rolling manner, the wheel hub 1 and the end cover 2 are detachably and fixedly connected, a motor 4 and a planetary gear reduction mechanism 5 are disposed in an internal space enclosed by the wheel hub 1 and the end cover 2, the planetary gear reduction mechanism includes a planet carrier 6, an outer gear ring 7, a sun gear ring 8 and a planetary gear 9, the planet carrier 6 has a one-way clutch, the sun gear ring 8 is mounted on a rotor 10 of the motor 4, the planet carrier 6 is fixedly sleeved on the main shaft 3, the planetary gear 9 is rotatably mounted on a fixed shaft 11 of the planet carrier 6, the planetary gear 9 is a duplicate gear, a large gear 12 of the planet gear is.
As shown in fig. 1-4, the outer circular surface of the outer gear ring 7 is provided with a plurality of force transmission teeth 14, the hub 1 or the end cap 2 is provided with force receiving teeth 15 matching with the force transmission teeth 14, the outer circular surface of the force transmission teeth 14 is movably sleeved with the inner surface of the hub 1, the inner circular surface of the force receiving teeth 15 is movably sleeved with the outer circular surface of the outer gear ring 7, and the elastic members 16 are also provided, the number of which is equal to the number of the force transmission teeth 14, the elastic member 16 with the crumple energy absorption function is a steel spring or a rubber strip, the elastic member 16 is installed between the force transmission teeth 14 and the force receiving teeth 15, the power of the motor is acted on the elastic member 16 by the planetary gear mechanism, and then is transmitted to the force receiving teeth 15 by the elastic member 16 to drive the hub 1 to rotate, when the electric bicycle is started/stopped, the elastic member 16.
In order to prevent the outer gear ring 7 and the elastic body 16 from moving axially, the inner side of the hub 1 is provided with a retaining ring 17, the retaining ring 17 is integrally formed with the hub 1, and the outer gear ring 7 and the elastic body 16 are limited between the retaining ring 17 and the end cover 2; when the stressed teeth 15 are arranged on the end cover 2, another technical scheme is as follows: the retaining ring 17 is not arranged on the hub 1, and the retaining ring 18 is fixedly arranged on the stressed teeth 15 so as to limit the axial displacement of the outer gear ring 7 and the elastic body 16, as shown in figure 5.
The gear hub motor with the one-stage speed reduction is widely applied to light electric bicycles, an outer gear ring 7 and a sun gear ring 8 in a planetary gear speed reduction mechanism are generally molded and sintered by adopting SMC materials, a planetary gear 9 is mainly molded or machined by adopting PA and POM materials, the gear hub motor with the structure is low in torque bearing capacity, when the bicycle is started/stopped, the planetary gear 9 can break teeth, and particularly when the bicycle is suddenly stopped in winter, the tooth breaking fault is easy to occur. The utility model discloses a model machine, the tooth height of duplex planetary gear is less than the commercially available motor, installs on the electric bicycle that 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.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021283379.9U CN213402721U (en) | 2020-07-03 | 2020-07-03 | A gear protection mechanism for in-wheel motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021283379.9U CN213402721U (en) | 2020-07-03 | 2020-07-03 | A gear protection mechanism for in-wheel motor |
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| Publication Number | Publication Date |
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| CN213402721U true CN213402721U (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021283379.9U Active CN213402721U (en) | 2020-07-03 | 2020-07-03 | A gear protection mechanism for in-wheel motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118353200A (en) * | 2024-03-14 | 2024-07-16 | 常州迈格星智能科技有限公司 | Wheel motor structure |
| CN118751345A (en) * | 2024-09-06 | 2024-10-11 | 安徽科达新材料有限公司 | A graphene safety production device |
-
2020
- 2020-07-03 CN CN202021283379.9U patent/CN213402721U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118353200A (en) * | 2024-03-14 | 2024-07-16 | 常州迈格星智能科技有限公司 | Wheel motor structure |
| CN118353200B (en) * | 2024-03-14 | 2024-11-19 | 常州迈格星智能科技有限公司 | A wheel motor structure |
| CN118751345A (en) * | 2024-09-06 | 2024-10-11 | 安徽科达新材料有限公司 | A graphene safety production device |
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Effective date of registration: 20251125 Address after: 450000 Henan Province, Zhengzhou City, Zhongda New District, Basha Town, Xianghu South Road, No. 98, Tianyi Jianyuan Community, Building 1, West Unit, 101 Patentee after: Zhengzhou Kezhida Intelligent Technology Co.,Ltd. Country or region after: China Address before: No. 63, dashuijia, Lingqiao village, Chunjiang Town, Xinbei District, Changzhou City, Jiangsu Province, 213127 Patentee before: Hui Huaxing Country or region before: China |