TWM654113U - Power assisted motor and power assisted bicycle - Google Patents

Abstract

The present invention discloses a power assisted motor and a power assisted bicycle. The power assisted motor includes a motor body, a first cover, a transmission gear set, a second cover and a control circuit board. The motor body includes a housing and a motor. The housing has a first side and a second side. The motor is disposed on the first side of the housing and has a rotating shaft extending to the second side. The first cover is disposed on the second side of the housing, and the first cover covers the housing to form a first accommodation space. The transmission gear set is disposed in the first accommodation space, and the rotating shaft meshes with one of the gears of the transmission gear set. The second cover is disposed on the second side of the housing, and the second cover covers the housing to form a second accommodation space. The control circuit board is disposed in the second accommodation space and is electrically connected to the motor.

Description

Power-assisted motors and electric bicycles

The present invention relates to a motor, and more particularly to an assist motor and an assist bicycle having the assist motor.

Bicycles are a common means of transportation for people. Riding a bicycle can achieve exercise effects and save energy, so more and more people like to ride bicycles when going out. However, when riding a bicycle, sometimes you may encounter a steep road or ride a long distance and get tired easily, which will lose the joy of riding a bicycle. In addition, the elderly are also prone to feeling tired when riding a bicycle.

In order to make it easier and smoother for people to ride bicycles, a type of power-assisted bicycle (abbreviated as power-assisted bicycle) equipped with a power-assisted motor has appeared on the market. The power of the user's pedaling and the electric drive force of the motor can be combined to move the vehicle forward, making it easier and more labor-saving for people to ride.

In the existing power-assisted motor, the speed gear set that drives the crankshaft to rotate and the control circuit board of the motor that drives the speed gear set to rotate are generally designed in the same accommodation space. In order to lubricate the speed gear, the accommodation space is filled with lubricating fluid, and it is generally difficult to repair or maintain the control circuit board. However, according to existing usage experience, the most common part of the electric bicycle that fails is the control circuit board of the power-assisted motor. When the control circuit board fails and needs to be repaired or replaced, the power-assisted motor must be removed from the electric bicycle, the housing of the speed gear set must be disassembled, and the crankshaft and the speed gear set must be separated before the control circuit board can be taken out or replaced. In this way, the maintenance process is quite complicated and difficult, making it quite difficult to repair or replace the control circuit board.

Therefore, how to provide an electric power assist motor and an electric power assist vehicle with the electric power assist motor so that the control circuit board can be easily repaired and maintained is one of the issues that the relevant manufacturers attach great importance to.

In view of the above problems, the object of the present invention is to provide an assist motor and an electric bicycle having the assist motor, which have the characteristics of easy repair and maintenance of the control circuit board.

This new type of power-assisted motor adopts oil-electric separation, making the maintenance of the power-assisted motor quite easy.

To achieve the above-mentioned purpose, an auxiliary motor according to the present invention includes a motor body, a first cover, a speed gear set, a second cover and a control circuit board. The motor body includes a housing and a motor, the housing has a first side and a second side, the motor is arranged on the first side of the housing, and has a rotating shaft extending to the second side. The first cover is arranged on the second side of the housing, and the first cover is covered with the housing to form a first accommodating space. The speed gear set is arranged in the first accommodating space, and the rotating shaft is engaged with one of the gears of the speed gear set. The second cover is arranged on the second side of the housing, and the second cover is covered with the housing to form a second accommodating space. The control circuit board is arranged in the second accommodation space and is electrically connected to the motor.

To achieve the above-mentioned purpose, a kind of electric bicycle according to the present invention includes a frame and an electric motor. The electric motor is arranged on the frame and includes a motor body, a first cover, a speed gear set, a second cover and a control circuit board. The motor body includes a housing and a motor, the housing has a first side and a second side, the motor is arranged on the first side of the housing and has a rotating shaft extending to the second side. The first cover is arranged on the second side of the housing, and the first cover is covered on the housing to form a first accommodating space. The speed gear set is arranged in the first accommodating space, and the rotating shaft is engaged with one of the gears of the speed gear set. The second cover is arranged on the second side of the shell, and the second cover is covered on the shell to form a second accommodating space. The control circuit board is arranged in the second accommodating space and is electrically connected with the motor.

As mentioned above, in the power-assisted motor and power-assisted bicycle of the present invention, oil (lubricating oil) and electricity (control circuit) separation is adopted, so that the control circuit board and the speed gear set are located in two different accommodation spaces. Thus, compared with the existing practice of locating the control circuit board and the speed gear set in the same accommodation space, the present invention has the characteristic of easy maintenance of the control circuit board.

The following will describe the power-assisted motor and the power-assisted bicycle according to the present invention with reference to the relevant drawings, wherein the same components will be described with the same reference symbols.

The new type of power-assist motor is suitable for use with a bicycle, that is, the power-assist motor can be installed on the bicycle to combine the pedaling force of the user with the electric drive force of the motor to help the bicycle move forward, making it easier and more labor-saving for people to ride.

FIG. 1 is a schematic diagram of a power-assisted bicycle according to an embodiment of the present invention, and FIG. 2 and FIG. 3 are respectively an assembled schematic diagram and an exploded schematic diagram of an assist motor in the power-assisted bicycle of FIG. 1 .

Please refer to FIG. 1 . The electric bicycle 1 includes a frame 11 and an electric motor 2. The electric motor 2 is disposed on the frame 11. In addition, the electric bicycle 1 of this embodiment may further include two cranks 12a, 12b and two pedals 13. It should be noted that the frame 11 of this embodiment is a general term. Any frame or support frame used to support the electric bicycle 1 may be referred to as the frame 11. Here, the electric motor 2 is disposed at the bottom of the frame 11 and is connected to the cranks 12a, 12b, respectively. Of course, the electric bicycle 1 may also include other parts that are well known to everyone, such as front wheels, rear wheels, handlebars, seats, chains, brakes, etc. These parts are not specifically introduced in this new model.

2 and 3 , the booster motor 2 includes a motor body 21, a first cover 22, a speed change gear set 23, a second cover 24, and a control circuit board 25. In addition, the booster motor 2 of this embodiment further includes a crankshaft 26 and a cover 27.

The motor body 21 includes a housing 211 and a motor 212 . The housing 211 has a first side S1 and a second side S2 opposite to the first side. The motor 212 is disposed on the first side S1 of the housing 211 and has a rotating shaft 213 extending to the second side S2 .

The first cover 22 is disposed on the second side S2 of the housing 211, and the first cover 22 covers the housing 211 to form a first accommodation space A1. The first cover 22 is smaller than the housing 211, and is screwed to the housing 211 to form the first accommodation space A1 therein.

The speed gear set 23 is disposed in the first accommodation space A1, and the rotating shaft 213 of the motor 212 is engaged with one of the gears 231 of the speed gear set 23. The rotating shaft 213 of the motor 212 of this embodiment extends into the first accommodation space A1 and is engaged with the gear 231. In addition, the crankshaft 26 of this embodiment is penetrated through the housing 211, the speed gear set 23 and the first cover 22, and the cranks 12a and 12b are connected to the opposite ends of the crankshaft 26 (Figure 1). Here, the crankshaft 26 is penetrated through another gear 232 of the speed gear set 23 and is tightly connected to the gear 232. Therefore, when the motor 212 rotates, the crankshaft 26 can be driven to rotate via the speed gear set 23 (gears 231, 232). In one embodiment, the first accommodating space A1 also accommodates lubricating oil for lubricating the speed gear set 23.

The second cover 24 is disposed on the second side S2 of the housing 211, and the second cover 24 covers (e.g., locks) the housing 211 to form a second accommodating space A2. Here, the shape of the second cover 24 plus the first cover 22 matches the shape of the housing 211, and the first accommodating space A1 and the second accommodating space A2 are adjacent spaces.

The control circuit board 25 is disposed in the second accommodation space A2 and is electrically connected to the motor 212. The shape of the control circuit board 25 of the present embodiment is matched with the shape of the second accommodation space A2. The control circuit board 25 has a driving control circuit for driving the motor 212 to rotate, and the control circuit board 25 is also provided with a control element electrically connected to a lamp and/or a sensor, for example. Therefore, when the control circuit board 25 drives the motor 212 to rotate, the shaft 213 located in the first accommodation space A1 can drive the speed change gear set 23 to rotate, and then drive the crankshaft 26 to rotate, thereby providing an electric driving force to move the bicycle 1 forward. In one embodiment, the control circuit board 25 can sense the torque signal generated by the user stepping on the pedal 13, and convert it into a driving signal of the motor 212 to drive the motor 212 to rotate, so that people can ride more smoothly and easily.

In addition, the second cover 24 includes a heat dissipation structure 241, which is located on a side of the second cover 24 away from the motor 212. The heat dissipation structure 241 includes a plurality of heat dissipation fins, which are used to dissipate heat of the control circuit board 25.

In addition, the cover 27 is disposed on the first side S1 of the housing 211 and covers the motor 212. The cover 27 covers (e.g., locks) the motor 212, so that when the motor 212 rotates, it can protect personnel from being accidentally touched and injured.

Please refer to Figure 1 again. The crank 12a is connected (locked) to one end of the crank shaft 26, and the other crank 12b is connected (locked) to the other end of the crank shaft 26. Each crank 12a, 12b can be connected to a pedal 13 respectively, so that the user can step on it to drive the cranks 12a, 12b and the crank shaft 26 to rotate, and then drive the electric bicycle 1 forward through a chain (not shown).

As mentioned above, in the power assist motor 2 of the present invention, the first cover 22 is covered on the housing 211 of the motor body 21 to form the first accommodation space A1, the speed gear set 23 is arranged in the first accommodation space A1, and the shaft 213 of the motor 212 is engaged with the gear 231 of the speed gear set 23, the second cover 24 is covered on the housing 211 to form the second accommodation space A2, and the control circuit board 25 is arranged in the second accommodation space A2 and electrically connected to the motor 212. The control circuit board 25 of the present invention and the speed gear set 23 are located in two different accommodation spaces. In this way, when the control circuit board 25 fails and needs to be repaired or replaced, the control circuit board 25 can be repaired or replaced by removing the second cover 24. Therefore, compared with the existing design that the gearshift gear set and the control circuit board are placed in the same space filled with lubricating oil, and the gearshift gear set housing needs to be disassembled and the crankshaft and the gearshift gear set separated before the control circuit board can be replaced, the new power-assisted motor 2 and the electric bicycle 1 have the characteristics of easy maintenance of the control circuit board 25. In addition, the new power-assisted motor 2 adopts the oil (lubricating oil) and electricity (control circuit) separation method, making the maintenance of the power-assisted motor 2 quite easy.

In summary, in the power-assisted motor and power-assisted bicycle of the present invention, oil (lubricating oil) and electricity (control circuit) separation is adopted, so that the control circuit board and the speed gear set are located in two different accommodation spaces. Thus, compared with the existing practice of locating the control circuit board and the speed gear set in the same accommodation space, the present invention has the characteristic of easy maintenance of the control circuit board.

The above description is for illustrative purposes only and is not intended to be limiting. Any equivalent modifications or changes made to the invention without departing from the spirit and scope of the invention shall be included in the scope of the patent application attached hereto.

1: Moped 11: Frame 12a, 12b: Crank 13: Pedal 2: Assisted motor 21: Motor body 211: Housing 212: Motor 213: Rotating shaft 22: First cover 23: Shift gear set 231, 232: Gear 24: Second cover 241: Heat dissipation structure 25: Control circuit board 26: Crank shaft 27: Cover A1: First accommodating space A2: Second accommodating space S1: First side S2: Second side

FIG1 is a schematic diagram of a power-assisted bicycle of an embodiment of the present invention. FIG2 and FIG3 are respectively a schematic diagram of an assembly and a schematic diagram of a power-assisted motor in the power-assisted bicycle of FIG1 .

2: Assist motor

21: Motor body

211: Shell

212: Motor

213: Rotating axis

22: First cover

23: Speed gear set

231, 232: Gear

24: Second cover

241: Heat dissipation structure

25: Control circuit board

26: Crankshaft

27: Mask body

A1: The first storage space

A2: Second storage space

S1: First side

S2: Second side

Claims (15)

A power-assist motor is suitable for use with a power-assist vehicle. The power-assist motor comprises: A motor body, comprising a housing and a motor, the housing having a first side and a second side, the motor being arranged on the first side of the housing and having a rotating shaft extending to the second side; A first cover, arranged on the second side of the housing, and the first cover is engaged with the housing to form a first accommodating space; A speed gear set, arranged in the first accommodating space, the rotating shaft being engaged with one of the gears of the speed gear set; A second cover, arranged on the second side of the housing, and the second cover is engaged with the housing to form a second accommodating space; and A control circuit board is disposed in the second accommodation space and electrically connected to the motor. The power assist motor as described in claim 1, wherein the shaft extends to the first accommodating space. The power-assist motor as described in claim 1, wherein the first accommodating space and the second accommodating space are adjacent to each other. An assist motor as described in claim 1, wherein a shape of the control circuit board matches a shape of the second accommodating space. The assist motor as described in claim 1, wherein the second cover includes a heat dissipation structure. The power-assisted motor as described in claim 1 further comprises: A cover disposed on the first side and covering the motor. The power-assisted motor as described in claim 1 further comprises: A crankshaft passing through the housing, the speed gear set and the first cover. A power-assisted bicycle comprises: a frame; and an assist motor disposed on the frame, the assist motor comprising: a motor body comprising a housing and a motor, the housing having a first side and a second side, the motor being disposed on the first side of the housing and having a shaft extending to the second side; a first cover disposed on the second side of the housing, and the first cover being engaged with the housing to form a first accommodating space; a speed gear set disposed in the first accommodating space, the shaft being engaged with one of the gears of the speed gear set; A second cover is disposed on the second side of the housing, and the second cover covers the housing to form a second accommodating space; and A control circuit board is disposed in the second accommodating space and electrically connected to the motor. An electric bicycle as described in claim 8, wherein the shaft extends to the first accommodating space. The electric bicycle as described in claim 8, wherein the first accommodating space and the second accommodating space are adjacent to each other. An electric bicycle as described in claim 8, wherein the shape of the control circuit board matches the shape of the second accommodating space. An electric bicycle as described in claim 8, wherein the second cover includes a heat dissipation structure. In the electric bicycle as described in claim 8, the electric assist motor further includes a cover body, which is disposed on the first side and covers the motor. In the electric bicycle as described in claim 8, the assist motor further includes a crankshaft, and the crankshaft passes through the housing, the speed gear set and the first cover. The electric bicycle as described in claim 14 further comprises: Two cranks connected to opposite ends of the crankshaft.

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