WO2014044198A1 - Power wheel for driving motor home or yacht to move - Google Patents

Power wheel for driving motor home or yacht to move Download PDF

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Publication number
WO2014044198A1
WO2014044198A1 PCT/CN2013/083797 CN2013083797W WO2014044198A1 WO 2014044198 A1 WO2014044198 A1 WO 2014044198A1 CN 2013083797 W CN2013083797 W CN 2013083797W WO 2014044198 A1 WO2014044198 A1 WO 2014044198A1
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WO
WIPO (PCT)
Prior art keywords
hub
shaft
motor
yacht
power wheel
Prior art date
Application number
PCT/CN2013/083797
Other languages
French (fr)
Chinese (zh)
Inventor
戴炳炎
Original Assignee
宁波普瑞曼进出口有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁波普瑞曼进出口有限公司 filed Critical 宁波普瑞曼进出口有限公司
Publication of WO2014044198A1 publication Critical patent/WO2014044198A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle

Definitions

  • the invention relates to the field of machinery, in particular to a power wheel for driving a motorhome or a yacht.
  • the front of the bottom of the RV and the yacht is equipped with wheels for supporting the superstructure and rolling to facilitate the movement of the RV or the yacht.
  • the wheel itself has no power and is powered by an electric motor mounted on one side of the wheel.
  • the wheel can be rotated.
  • the above structure is bulky and heavy, and since the motor is located on one side of the wheel, it is inconvenient to turn to the engine side when the wheel is moving, and the exposed motor may be bumped, destroyed or corroded by the ground. , insufficient security.
  • the technical problem to be solved by the present invention is to provide a power wheel for driving a motorhome or a yacht to move, which is compact in size, light in weight, convenient in steering, and capable of improving the safety of the motor.
  • the technical solution of the present invention is to provide a power wheel for driving a motorhome or a yacht with the following structure, which comprises a hub and a shaft, wherein the hub is provided with a central chamber, and the shaft is rotatably mounted on the hub, the hub An electric motor is arranged in the central chamber, and the electric motor is connected to the hub via a transmission.
  • the power wheel of the present invention for driving the moving of a motorhome or a yacht has the following advantages compared with the prior art:
  • the power wheel essentially realizes the built-in electric motor, and the electric motor is installed in the hub of the power wheel instead of being located outside, so that the volume is obviously reduced, the weight is reduced, and there is no motor interference on the side of the power wheel, and the steering is unbound, and more Conveniently, the motor is located in the hub, and under the protection of the hub, the probability of impact, damage, ground splash corrosion is reduced, and the safety is improved.
  • the inner ring of the central cavity of the hub is fixed with an inner ring gear
  • one end of the outer rotor of the motor is fixed with a sun wheel
  • a plurality of planet wheels are arranged between the sun gear and the inner ring gear
  • the plurality of planet wheels are
  • the planet carrier is connected, and the plurality of planet wheels mesh with the sun gear and mesh with the ring gear at the same time.
  • the inner stator of the motor is fixed on the shaft
  • the outer rotor of the motor is rotatably mounted on the shaft
  • the outer rotor is provided with a recess at one end away from the sun gear
  • the inner stator is housed in the recess
  • the center of the sun wheel is provided with a shaft. Through hole, This structure is easy to assemble and stable and reliable.
  • FIG. 1 is a side cross-sectional structural view of a power wheel for driving a motorhome or a yacht according to the present invention.
  • FIG. 2 is a schematic view showing the explosion structure of the power wheel for driving a motorhome or a yacht according to the present invention.
  • the present invention is used for a power wheel that drives a motorhome or a yacht, and includes a hub 1 and a shaft 3.
  • the hub 1 is provided with a central chamber 2, and the shaft 3 is rotatably mounted on the hub 1, that is, the end cover 11 is fixed at the front end opening of the central chamber 2 of the hub 1, and the center of the end cover 11 is provided with a bearing 9, the hub 1
  • An axial through hole is also formed through the rear wall, and a bearing 9 is also disposed in the axial through hole, and the shaft 3 is mounted on the hub 1 via two bearings 9, respectively.
  • the two ends of the shaft 3 protrude from the hub 1, and the ends of the shaft 3 are fixed to the brackets of the floor of the motorhome or the yacht.
  • the shaft 3 is fixed and does not rotate regardless of whether the power wheel is activated or not.
  • An electric motor is disposed in the central chamber 2 of the hub 1, that is, the inner stator 8 of the motor is fixed on the shaft 3.
  • the outer rotor 5 of the motor is rotatably mounted on the shaft 3 via a bearing 9, and the outer rotor 5 is provided with a recess 5 at one end thereof.
  • the inner rotor 5 is provided with a recess 5.1 and a through hole, the pit 5.1 and the through hole are mutually penetrated, the shaft 3 is provided.
  • the inside of the outer rotor 5 is received in the recess 5.1 of the outer rotor 5 through the through hole of the outer rotor 5.
  • the motor is connected to the hub 1 via a transmission.
  • the center of the sun gear 6 is provided with a through hole for the shaft 3 to pass through.
  • the sun gear 6 is fixed to the outer rotor 5 away from the end of the pit 5.1 and the shaft 3 passes through the sun gear.
  • the through holes of 6 are engaged with the plurality of planet gears 7, respectively, and the plurality of planet gears 7 are evenly distributed along the circumferential direction of the shaft 3 and are both connected to the carrier 10, and the planetary gears 7 are fixed to the central chamber of the hub 3.
  • the ring gear 4 on the circumferential wall of 2 is engaged, and the number of the planetary gears 7 of the present embodiment is preferably three.
  • the power wheel may also employ only one planetary gear 7 mounted on the carrier 10 instead of a plurality of planetary gears 7, which are also the same.
  • the sun gear 6 and the inner ring gear 4 are respectively meshed; the transmission of the power wheel can also be driven by the planetary gear train, but a driving wheel is directly fixed on the outer rotor 5, and the driving wheel is directly fixed to the hub 1.
  • the inner ring gear 4 is meshed; the motor can also adopt an inner rotor and an outer stator motor, wherein the outer stator is fixed on the shaft 3, the inner rotor is also located in the recess of the outer stator, and the inner rotor is rotatable via the bearing 9 and the shaft 3. Cooperate, while the sun gear 6 is fixed with the inner rotor; Various changes made within the scope of the invention of the invention are within the scope of the invention.

Abstract

A power wheel for driving a motor home or yacht to move comprises a hub (1) and a shaft (3). A central cavity (2) is provided inside the hub (1), the shaft (3) is movably mounted on the hub (1), a motor is provided inside the central cavity (2) of the hub (1), and the motor is connected to the hub (1) by an actuator. The power wheel for driving a motor home or yacht to move is reduced in size and lightened in weight, is easy to steer, and can improve the security of the motor.

Description

用于带动房车或游艇移动的动力轮  Power wheel for driving a motorhome or yacht
技术领域 Technical field
本发明涉及机械领域， 具体讲是一种用于带动房车或游艇移动的动力轮。  The invention relates to the field of machinery, in particular to a power wheel for driving a motorhome or a yacht.
背景技术 Background technique
房车和游艇的底壳前部都安装有用于支撑上部结构及滚动以便于房车或游艇移动的 轮子， 该轮子本身没有动力， 都是靠安装在轮子一侧的电动机来提供动力， 该轮子可转 动配合在与房车、 游艇底壳固定的支架上， 发动机的外壳也固定在支架上， 电动机的输 出轴与轮子的轮毂的周向限位以带动轮毂转动。 上述结构， 体积较大， 重量较重， 而且 由于电动机位于轮子的一侧， 轮子运动时， 向发动机一侧转向不方便， 而且暴露在外的 电动机有可能遭到撞击、 破坏或被地面溅水腐蚀， 安全性不足。  The front of the bottom of the RV and the yacht is equipped with wheels for supporting the superstructure and rolling to facilitate the movement of the RV or the yacht. The wheel itself has no power and is powered by an electric motor mounted on one side of the wheel. The wheel can be rotated. Fitted on the bracket fixed to the bottom of the RV and the yacht, the outer casing of the engine is also fixed on the bracket, and the output shaft of the motor and the hub of the wheel are circumferentially limited to drive the hub to rotate. The above structure is bulky and heavy, and since the motor is located on one side of the wheel, it is inconvenient to turn to the engine side when the wheel is moving, and the exposed motor may be bumped, destroyed or corroded by the ground. , insufficient security.
发明内容 Summary of the invention
本发明要解决的技术问题是， 提供一种体积缩小、 重量减轻、 转向方便且能提高电 动机安全性的用于带动房车或游艇移动的动力轮。  The technical problem to be solved by the present invention is to provide a power wheel for driving a motorhome or a yacht to move, which is compact in size, light in weight, convenient in steering, and capable of improving the safety of the motor.
本发明的技术解决方案是， 提供一种具有以下结构的用于带动房车或游艇移动的动 力轮， 它包括轮毂和轴， 轮毂内设有中心腔室， 轴可转动安装在轮毂上， 轮毂的中心腔 室内设有电动机， 电动机经传动装置与轮毂连接。  The technical solution of the present invention is to provide a power wheel for driving a motorhome or a yacht with the following structure, which comprises a hub and a shaft, wherein the hub is provided with a central chamber, and the shaft is rotatably mounted on the hub, the hub An electric motor is arranged in the central chamber, and the electric motor is connected to the hub via a transmission.
采用以上结构后， 本发明用于带动房车或游艇移动的动力轮与现有技术相比， 具有 以下优点：  With the above structure, the power wheel of the present invention for driving the moving of a motorhome or a yacht has the following advantages compared with the prior art:
该动力轮实质上实现了电动机的内置， 电动机安装在动力轮的轮毂内， 而不是居于 外侧， 这样， 体积明显减小， 重量减轻， 而且动力轮一侧没有电动机的干涉， 转向无束 缚， 更加方便， 况且， 电动机位于轮毂内， 在轮毂保护下， 受到撞击、 破坏、 地面溅水 腐蚀的概率减小， 安全性提高。  The power wheel essentially realizes the built-in electric motor, and the electric motor is installed in the hub of the power wheel instead of being located outside, so that the volume is obviously reduced, the weight is reduced, and there is no motor interference on the side of the power wheel, and the steering is unbound, and more Conveniently, the motor is located in the hub, and under the protection of the hub, the probability of impact, damage, ground splash corrosion is reduced, and the safety is improved.
作为优选， 轮毂的中心腔室的圆周壁上固定有内齿圈， 电动机的外转子的一端固定 有一个太阳轮， 太阳轮和内齿圈之间设有多个行星轮， 多个行星轮与行星架连接， 多个 行星轮均与太阳轮啮合并同时与内齿圈啮合， 这样， 电动机的动力经行星轮系传动， 传 动稳定、 效率高， 支撑性好， 噪音低。  Preferably, the inner ring of the central cavity of the hub is fixed with an inner ring gear, and one end of the outer rotor of the motor is fixed with a sun wheel, and a plurality of planet wheels are arranged between the sun gear and the inner ring gear, and the plurality of planet wheels are The planet carrier is connected, and the plurality of planet wheels mesh with the sun gear and mesh with the ring gear at the same time. Thus, the power of the motor is transmitted through the planetary gear train, the transmission is stable, the efficiency is high, the support is good, and the noise is low.
作为改进， 电动机的内定子固定在轴上， 电动机的外转子可转动安装在轴上， 外转 子远离太阳轮的一端设有凹坑， 内定子容置在凹坑内， 太阳轮中心设有供轴穿过的通孔， 这样的结构装配方便， 运行稳定可靠。 As an improvement, the inner stator of the motor is fixed on the shaft, the outer rotor of the motor is rotatably mounted on the shaft, the outer rotor is provided with a recess at one end away from the sun gear, the inner stator is housed in the recess, and the center of the sun wheel is provided with a shaft. Through hole, This structure is easy to assemble and stable and reliable.
附图说明 DRAWINGS
图 1是本发明用于带动房车或游艇移动的动力轮的侧剖视结构示意图。  1 is a side cross-sectional structural view of a power wheel for driving a motorhome or a yacht according to the present invention.
图 2是本发明用于带动房车或游艇移动的动力轮的爆炸结构示意图。  2 is a schematic view showing the explosion structure of the power wheel for driving a motorhome or a yacht according to the present invention.
图中所示 1、 轮毂， 2、 中心腔室， 3、 轴， 4、 内齿圈， 5、 外转子， 5. 1、 凹坑， Figure 1, hub, 2, center chamber, 3, shaft, 4, inner ring gear, 5, outer rotor, 5. 1, pit,
6、 太阳轮， 7、 行星轮， 8、 内定子， 9、 轴承， 10、 行星架， 11、 端盖。 6, the sun wheel, 7, the planetary wheel, 8, the inner stator, 9, bearing, 10, planet carrier, 11, end cover.
具体实 式 Specific form
下面结合附图和具体实施例对本发明作进一步说明。  The invention will be further described below in conjunction with the drawings and specific embodiments.
如图 1、图 2所示，本发明用于带动房车或游艇移动的动力轮，它包括轮毂 1和轴 3。 轮毂 1内设有中心腔室 2，轴 3可转动安装在轮毂 1上， 即轮毂 1的中心腔室 2的前端开 口处固定有端盖 11， 端盖 11的中心设有轴承 9， 轮毂 1的后壁上也贯通有轴向通孔， 轴 向通孔内也设有轴承 9，轴 3分别经过两个轴承 9安装在轮毂 1上。而轴 3的两端凸出轮 毂 1， 且轴 3的两端与房车或游艇的底板的支架固定。动力轮不管是否启动， 轴 3都是固 定不转动的。 轮毂 1的中心腔室 2内设有电动机， 即电动机的内定子 8固定在轴 3上， 电动机的外转子 5经轴承 9可转动安装在轴 3上，外转子 5的一端设有凹坑 5. 1， 内定子 8容置在凹坑 5. 1内， 具体的说， 外转子 5沿轴向设有凹坑 5. 1和通孔， 凹坑 5. 1和通孔 相互贯通，轴 3穿过外转子 5的通孔，与轴 3固定的内转子 8容置在外转子 5的凹坑 5. 1 内。 电动机经传动装置与轮毂 1连接， 具体来说， 太阳轮 6中心设有供轴 3穿过的通孔， 太阳轮 6固定在外转子 5远离凹坑 5. 1的一端且轴 3穿过太阳轮 6的通孔， 太阳轮 6分 别与多个行星轮 7啮合， 多个行星轮 7沿轴 3的周向均匀分布且均与行星架 10连接， 行 星轮 7与固定在轮毂 3的中心腔室 2的圆周壁上的内齿圈 4啮合， 本实施例的行星轮 7 的数目优选三个。  As shown in Figs. 1 and 2, the present invention is used for a power wheel that drives a motorhome or a yacht, and includes a hub 1 and a shaft 3. The hub 1 is provided with a central chamber 2, and the shaft 3 is rotatably mounted on the hub 1, that is, the end cover 11 is fixed at the front end opening of the central chamber 2 of the hub 1, and the center of the end cover 11 is provided with a bearing 9, the hub 1 An axial through hole is also formed through the rear wall, and a bearing 9 is also disposed in the axial through hole, and the shaft 3 is mounted on the hub 1 via two bearings 9, respectively. The two ends of the shaft 3 protrude from the hub 1, and the ends of the shaft 3 are fixed to the brackets of the floor of the motorhome or the yacht. The shaft 3 is fixed and does not rotate regardless of whether the power wheel is activated or not. An electric motor is disposed in the central chamber 2 of the hub 1, that is, the inner stator 8 of the motor is fixed on the shaft 3. The outer rotor 5 of the motor is rotatably mounted on the shaft 3 via a bearing 9, and the outer rotor 5 is provided with a recess 5 at one end thereof. The inner rotor 5 is provided with a recess 5.1 and a through hole, the pit 5.1 and the through hole are mutually penetrated, the shaft 3 is provided. The inside of the outer rotor 5 is received in the recess 5.1 of the outer rotor 5 through the through hole of the outer rotor 5. The motor is connected to the hub 1 via a transmission. Specifically, the center of the sun gear 6 is provided with a through hole for the shaft 3 to pass through. The sun gear 6 is fixed to the outer rotor 5 away from the end of the pit 5.1 and the shaft 3 passes through the sun gear. The through holes of 6 are engaged with the plurality of planet gears 7, respectively, and the plurality of planet gears 7 are evenly distributed along the circumferential direction of the shaft 3 and are both connected to the carrier 10, and the planetary gears 7 are fixed to the central chamber of the hub 3. The ring gear 4 on the circumferential wall of 2 is engaged, and the number of the planetary gears 7 of the present embodiment is preferably three.
以上仅就本发明较佳的实施例作了说明， 但不能理解为是对权利要求的限制。 本发 明不仅局限于以上实施例， 其具体结构允许有变化， 如： 该动力轮还可以仅采用一个安 装在行星架 10上的行星轮 7而不是多个行星轮 7， 该一个行星轮 7同样分别与太阳轮 6 和内齿圈 4啮合；该动力轮的传动装置也可以不采用行星轮系传动，而是直接在外转子 5 上固定一个主动轮， 该主动轮直接与固定在轮毂 1上的内齿圈 4啮合； 该电动机还可以 采用内转子、 外定子的电动机， 其中， 外定子固定在轴 3上， 内转子同样位于外定子的 凹坑内， 且内转子经轴承 9与轴 3可转动配合， 而太阳轮 6与内转子固定； 等等。 凡在 本发明独立权利要求的保护范围内所作的各种变化均在本发明的保护范围内。  The above description of the preferred embodiments of the invention has been presented by way of illustration only The present invention is not limited to the above embodiment, and its specific structure allows variations, such as: The power wheel may also employ only one planetary gear 7 mounted on the carrier 10 instead of a plurality of planetary gears 7, which are also the same. The sun gear 6 and the inner ring gear 4 are respectively meshed; the transmission of the power wheel can also be driven by the planetary gear train, but a driving wheel is directly fixed on the outer rotor 5, and the driving wheel is directly fixed to the hub 1. The inner ring gear 4 is meshed; the motor can also adopt an inner rotor and an outer stator motor, wherein the outer stator is fixed on the shaft 3, the inner rotor is also located in the recess of the outer stator, and the inner rotor is rotatable via the bearing 9 and the shaft 3. Cooperate, while the sun gear 6 is fixed with the inner rotor; Various changes made within the scope of the invention of the invention are within the scope of the invention.

Claims

权 利 要 求 书 claims
1、 一种用于带动房车或游艇移动的动力轮， 它包括轮毂 （1) 和轴 （3)， 轮毂 （1) 内设有中心腔室 （2)， 轴 （3) 可转动安装在轮毂 （1) 上， 其特征在于： 轮毂 （1) 的中 心腔室 （2) 内设有电动机， 电动机经传动装置与轮毂 （1) 连接。 1. A power wheel used to drive RVs or yachts to move. It includes a hub (1) and a shaft (3). The hub (1) is provided with a central chamber (2), and the shaft (3) is rotatably installed on the hub. (1), which is characterized in that: the central cavity (2) of the hub (1) is equipped with an electric motor, and the electric motor is connected to the hub (1) through a transmission device.
2、根据权利要求 1所述的用于带动房车或游艇移动的动力轮，其特征在于：轮毂（1) 的中心腔室 （2) 的圆周壁上固定有内齿圈 （4)， 电动机的外转子 （5) 的一端固定有一 个太阳轮 （6)， 太阳轮 （6) 和内齿圈 （4) 之间设有多个行星轮 （7)， 多个行星轮 （7) 与行星架（10)连接， 多个行星轮（7)均与太阳轮（6)啮合并同时与内齿圈 （4)啮合。 2. The power wheel for driving the RV or yacht to move according to claim 1, characterized in that: an internal ring gear (4) is fixed on the circumferential wall of the central chamber (2) of the hub (1), and the motor is A sun gear (6) is fixed at one end of the outer rotor (5), and multiple planet gears (7) are provided between the sun gear (6) and the inner ring gear (4). The multiple planet gears (7) and the planet carrier (10) connection, multiple planetary gears (7) are meshed with the sun gear (6) and meshed with the internal ring gear (4) at the same time.
3、 根据权利要求 1所述的用于带动房车或游艇移动的动力轮， 其特征在于： 电动机 的内定子 （8) 固定在轴 （3) 上， 电动机的外转子 （5) 可转动安装在轴 （3) 上， 外转 子 （5) 远离太阳轮 （6) 的一端设有凹坑 （5.1)， 内定子 （8) 容置在凹坑 （5.1) 内， 太阳轮 （6) 中心设有供轴 （3) 穿过的通孔。 3. The power wheel used to drive the RV or yacht to move according to claim 1, characterized in that: the inner stator (8) of the motor is fixed on the shaft (3), and the outer rotor (5) of the motor is rotatably installed on the shaft (3). On the shaft (3), an end of the outer rotor (5) away from the sun gear (6) is provided with a recess (5.1), the inner stator (8) is accommodated in the recess (5.1), and the center of the sun gear (6) is provided with a recess (5.1). Through hole for the shaft (3) to pass through.
PCT/CN2013/083797 2012-09-18 2013-09-18 Power wheel for driving motor home or yacht to move WO2014044198A1 (en)

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