CN203345148U

CN203345148U - Bicycle driving unit

Info

Publication number: CN203345148U
Application number: CN 201320327364
Authority: CN
Inventors: 高俊
Original assignee: Shimano Inc
Current assignee: Shimano Inc
Priority date: 2013-06-07
Filing date: 2013-06-07
Publication date: 2013-12-18
Anticipated expiration: 2023-06-07

Abstract

A bicycle driving unit comprises a first central shaft, a crankshaft, a first motor and an output member. The crankshaft is rotationally supported by the first central shaft. The first motor comprises a first shell, a second shell, a first rotor and a first stator. The first shell is connected to the crankshaft and cannot rotate. The second shell is connected to a central shaft shell and cannot rotate. The first rotor is provided with a first magnet. The first stator is connected to the first central shaft and cannot rotate. The first rotor is operationally connected to the first end portion of the crankshaft and matched with the first shell. The output member is operationally connected to the second end portion of the crankshaft so that the first motor can transmit rotary output to the output member through the crankshaft.

Description

Bicycle drive unit

Technical field

The utility model relates to and relates generally to a kind of bicycle drive unit.More specifically, the utility model relates to a kind of bicycle drive unit with motor.

Background technology

Electrically assisted bicycle is conventional known, and it uses motor output as auxiliary power (for example, referring to DE 195 22 419 A1(patent citations 1), DE 196 29 788 A1(patent citations 2)).In electrically assisted bicycle, the power that scrunches is combined with the propulsive effort from motor, and then combining propulsive effort is delivered to trailing wheel.Especially, patent citation 1 shows axis attachment and the rotor that stator is attached to bicycle and utilizes crank arm to be attached to the motor driver of crank shaft.Patent citation 2 shows stator and is fixed to the cycle frame of bicycle and the driver element that rotor is connected to crank arm.

The utility model content

Generally, the utility model relates to a kind of bicycle drive unit.In a feature, bicycle drive unit can be attached to the intermediate axle housing of bicycle and produce relatively large auxiliary power.

According to first aspect, a kind of bicycle drive unit comprises the first axis, crank shaft, the first motor and output link.The first central-axis structure is the first axial end that is connected to the intermediate axle housing of bicycle.Crank shaft can be supported rotatably by the first axis.Crank shaft has first end and the second end.The first motor comprises the first housing, the second housing, the first rotor and the first stator.The first housing is not connected to crank shaft revolvably.The second housing is not connected to intermediate axle housing revolvably.The first rotor has the first magnet.The first stator is not connected to the first axis revolvably.The first rotor functionally is connected to the first end of crank shaft and is configured on the first housing.Output link functionally is connected to the second end of crank shaft, so that the first motor will rotate output, via crank shaft, is delivered to output link.

According to second aspect, wherein, according to the bicycle drive unit of first aspect, the second housing is not connected to the first axis revolvably.

According to the third aspect, wherein, according to the bicycle drive unit of first aspect, the first stator is bearing on the first axis.

According to fourth aspect, wherein, according to the bicycle drive unit of first aspect, the first magnet configuration is on the perimembranous of the first housing.

According to the 5th aspect, wherein according to the bicycle drive unit of fourth aspect, the first magnet configuration is on the inner peripheral surface of the perimembranous of the first housing, so that the first magnet and the first stator radially face with each other about the rotation axis of crank shaft.

According to the 6th aspect, wherein, according to the bicycle drive unit of the 5th aspect, the first magnet is fixedly attached to the inner peripheral surface of the perimembranous of the first housing.

According to the 7th aspect, wherein, according to the bicycle drive unit of first aspect, the first axis has external thread part, and it is configured to the internal thread part of thread connection to intermediate axle housing.

According to eight aspect, wherein, according to the bicycle drive unit of first aspect, crank shaft can be connected to the central part of the first housing with dismantling.

According to the 9th aspect, wherein, according to the bicycle drive unit of first aspect, crank shaft has outer sawtooth.The first housing has the interior sawtooth on the inside face that is formed on the first housing.The interior sawtooth of the first housing is not connected to the outer sawtooth of crank shaft revolvably.

According to the tenth aspect, wherein, according to the bicycle drive unit of first aspect, also comprise the first crank arm.The first crank arm is not connected to the first end of crank shaft revolvably.

According to the tenth one side, wherein, according to the bicycle drive unit of first aspect, the first motor also is included in the sealing member between the first housing and the second housing, to limit seal cavity.

According to the 12 aspect, wherein, according to the bicycle drive unit of first aspect, also comprise the second axis.The second central-axis structure is the second axial end that is connected to intermediate axle housing.The second axial end of intermediate axle housing is relative with the first axial end of intermediate axle housing.Crank shaft can be supported rotatably by the second axis.

According to the tenth three aspects:, wherein, according to the bicycle drive unit of the 12 aspect, also comprise the second crank arm.The second crank arm is not connected to the second end of crank shaft revolvably.

According to the 14 aspect, wherein, according to the bicycle drive unit of the tenth three aspects:, the second crank arm comprises the output link attachment.Output link is chain link, and it utilizes fastener can be connected to the output link attachment with dismantling.

According to the 15 aspect, wherein, according to the bicycle drive unit of the 12 aspect, also comprise the second motor.The second motor comprises the 3rd housing, the 4th housing, the second rotor and the second stator.The 3rd housing is not connected to crank shaft revolvably.The 4th housing is fixedly coupled to the second intermediate axle housing.The second rotor configuration is on the perimembranous of the 3rd housing.The second stator is bearing on the second axis.

According to the 16 aspect, wherein, according to the bicycle drive unit of the 15 aspect, output link can be connected to the 3rd housing with dismantling, so that the second motor will rotate output, is delivered to output link.

According to the 17 aspect, wherein, according to the bicycle drive unit of first aspect, the first housing has the magnet containing component, and it is contained in the first magnet in the inner space of magnet containing component.

According to the tenth eight aspect, wherein, according to the bicycle drive unit of first aspect, the second housing has the stator containing component, and it is contained in the first stator in the inner space of stator containing component.

According to the 19 aspect, wherein, according to the bicycle drive unit of the 17 aspect, the second housing has the stator containing component, and it is contained in the first stator in the inner space of stator containing component.

According to the 20 aspect, wherein, according to the bicycle drive unit of the 19 aspect, the magnet containing component of the first housing and the stator containing component of the second housing are made by non-magnetic material.

According to the 20 one side, wherein, according to the bicycle drive unit of first aspect, the first stator has the stator tooth that is fixedly attached to the first axis and is wrapped in the winding wire on stator tooth.

According to the 22 aspect, wherein, according to the bicycle drive unit of first aspect, the first axis comprises that bearing unit is can support rotatably crank shaft.

According to the 20 three aspects:, wherein, according to the bicycle drive unit of first aspect, the first motor is three-phase dc motor.

According to the 24 aspect, wherein according to the bicycle drive unit of first aspect, the first rotor is configured on the axially facing surface of perimembranous of the first housing, so that the first rotor and the first stator axially face with each other about the rotation axis of crank shaft.

From the detailed description of preferred embodiment below in conjunction with the open bicycle drive unit of accompanying drawing, other purposes, feature, aspect and the advantage of disclosed bicycle drive unit will become clear for those skilled in the art.

The accompanying drawing explanation

With reference now to accompanying drawing,, it forms this original disclosed part:

Fig. 1 is the lateral plan of the bicycle drive unit with motor according to the first embodiment;

The cutaway view of the motor that Fig. 2 is bicycle drive unit shown in Figure 1;

The cutaway view of the bicycle drive unit shown in Figure 1 that Fig. 3 cuts open for the III-III line along in Fig. 1;

The exploded cutaway view of the motor that Fig. 4 is bicycle drive unit shown in Figure 3;

The cutaway view that Fig. 5 is bicycle drive unit shown in Figure 1, show the power transfer path from the motor of bicycle drive unit to output link;

Fig. 6 is the cutaway view according to the change bicycle drive unit of the first embodiment, and wherein the crank shaft of bicycle drive unit can be from the first housing dismounting of motor;

The exploded cutaway view of the motor that Fig. 7 is bicycle drive unit shown in Figure 6;

Fig. 8 is the cutaway view of the bicycle drive unit with a pair of motor according to the second embodiment;

Fig. 9 is the cutaway view of the bicycle drive unit with motor according to the 3rd embodiment;

The exploded cutaway view of the motor that Figure 10 is bicycle drive unit shown in Figure 9;

Figure 11 is the cutaway view according to the change bicycle drive unit of the 3rd embodiment, and wherein the crank shaft of bicycle drive unit can be from the first housing dismounting of motor;

The exploded cutaway view of the motor that Figure 12 is bicycle drive unit shown in Figure 11;

Figure 13 is the cutaway view of the bicycle drive unit with motor according to the 4th embodiment;

The exploded cutaway view of the motor that Figure 14 is bicycle drive unit shown in Figure 13;

Figure 15 is the cutaway view according to the change bicycle drive unit of the 4th embodiment, and wherein the crank shaft of bicycle drive unit can be from the first housing dismounting of motor; And

The exploded cutaway view of the motor that Figure 16 is bicycle drive unit shown in Figure 15.

The specific embodiment

Referring now to accompanying drawing, selected embodiment is described.The description that it will be apparent to one skilled in the art that the following examples from the utility model only is provided for illustration, rather than, for the utility model is limited, the utility model is limited by claims and equivalent thereof.

At first with reference to figure 1, show for example bicycle of electrically assisted bicycle 10() the left view of train, it comprises the bicycle drive unit 12 according to the first embodiment.As shown in Fig. 3 the best, bicycle drive unit 12 consists essentially of for example the first motor of the first axis 20, the second axis 21, crank shaft 22 and motor 24().In the illustrated embodiment, as shown in figures 1 and 3, bicycle drive unit 12 also comprises output link attachment or spoke arm 26, output link 28, the first crank arm 30, the second crank arm 32 and pair of

bearings unit

34 and 35.

In the illustrated embodiment, the free end at the first crank arm 30 and the second crank arm 32 can be equipped with the pair of pedals (not shown) respectively rotatably.The inner of the first crank arm 30 and the second crank arm 32 is respectively fixed to the opposite end of crank shaft 22.Output link 28 is not installed with respect to crank shaft 22 revolvably via output link attachment 26.Sprocket wheel (not shown) after being equipped with in a usual manner on the rear wheel boss shaft of trailing wheel.

Utilize bicycle drive unit 12, the power that scrunches on pedal of acting on is delivered to via chain the rear sprocket wheel that the rear wheel boss shaft around trailing wheel can configure rotatably.Especially, the power that scrunches from the first crank arm 30 and the second crank arm 32 is delivered to output link 28 via crank shaft 22.In addition, the rotation of motor 24 output is delivered to output link 28 from motor 24 via crank shaft 22.In the illustrated embodiment, bicycle drive unit 12 will scrunch power and combine as auxiliary power with the rotation output of motor 24, to assist rider's riding bicycle 10.

In the illustrated embodiment, bicycle drive unit 12 power corresponding with the torque on acting on crank shaft 22 by the torque sensor unit inspection.In this bicycle drive unit 12, when detected value is greater than while presetting level, connect motor 24 and produce torque as the auxiliary power corresponding with the power that scrunches.Certainly, those skilled in the art is from the utility model by clear, and motor 24 can be controlled by the detected value based on being detected by torque sensor, power sensor or other sensors.Bicycle drive unit 12 is arranged near the connecting bridge between the rearward end of lower pipe of the seat bottom of pipe of cycle frame and cycle frame.Especially, in the illustrated embodiment, bicycle drive unit 12 is attached to the intermediate axle housing 14 of the cycle frame of bicycle 10.Be provided with the storage battery (not shown) along back seat, lower pipe or seat pipe, for driving supply of power to motor 24.

As shown in Figure 2, utilize bicycle drive unit 12, the rotation axis of the rotation axis of crank shaft 22 and motor 24 arranges coaxially to each other.Hereinafter, by this, consistent rotation axis is called the rotation axis X1 of bicycle drive unit 12.

As shown in Figure 3, the cylindrical member of the first axis 20 for extending through for crank shaft 22.The first axis 20 can support crank shaft 22 via bearing unit 34 rotatably with respect to the intermediate axle housing 14 of bicycle 10.Especially, the first axis 20 is configured to be connected to the first axial end 14a of the intermediate axle housing 14 of bicycle 10.The first axis 20 has external thread part 40, and it is configured to the internal thread part 42 of thread connection to intermediate axle housing 14.In the illustrated embodiment, external thread part 40 is formed on the outer peripheral face of the first axial end portion 20a of the first axis 20.Utilize this structure, the first axis 20 is not connected to intermediate axle housing 14 revolvably and threadably.Yet those skilled in the art will know that from the utility model the first axis 20 can be connected to different usual manners intermediate axle housing 14.In addition, the first axis 20 has axial the second relative axial end portion 20b with the first axial end portion 20a.In the illustrated embodiment, the first axial end portion 20a is contained in intermediate axle housing 14, and the second axial end portion 20b axially is configured in intermediate axle housing 14 outsides.

As shown in Figure 3, the second axis 21 is configured to be connected to the second axial end 14b of intermediate axle housing 14.The second axial end 14b of intermediate axle housing 14 is relative with the first axial end 14a of intermediate axle housing 14.The second axis 21 is identical with the first axis 20, arranging symmetrically about the first axis 20 mirror images with respect to intermediate axle housing 14 except the second axis 21.The second axis 21 can also can support crank shaft 22 rotatably via the bearing unit 35 in bearing unit 34 axially-spaced locations.Certainly, those skilled in the art will know that from the utility model the first axis 20 can form with the second axis 21.The first axis 20 and the second axis 21 can be made for the material of bicycle middle shaft by tradition, such as aluminium, steel etc.

As shown in Figure 3, crank shaft 22 inserts through the intermediate axle housing 14 of bicycle 10.Crank shaft 22 can be supported about rotation axis X1 rotatably by the first axis 20.In addition, crank shaft 22 can be supported about rotation axis X1 rotatably by the second axis 21.Especially, crank shaft 22 can support with respect to intermediate axle housing 14 rotatably via bearing unit 34 and the bearing unit 35 of the first axis 20 and the second axis 21.Especially, the first axis 20 comprises that bearing unit 34 is can support rotatably crank shaft 22, and the second axis 21 comprises that bearing unit 35 is can support rotatably crank shaft 22.Crank shaft 22 has first end 44 and the second end 46.As shown in figures 1 and 3, the first crank arm 30 and the second crank arm 32 can be attached to first end 44 and the second end 46 respectively with dismantling, so that the first crank arm 30 and the second crank arm 32 are arranged on the axial outside of intermediate axle housing 14.In the illustrated embodiment, the first crank arm 30 and the second crank arm 32 can be connected to first end 44 and the second end 46 respectively in a usual manner with dismantling, such as being pressed into cooperation, be threaded, welding etc.Alternatively or alternatively, one in the first crank arm 30 and the second crank arm 32 can not be connected to crank shaft 22 with dismantling.For example, the first crank arm 30 can be formed integrally as the single type integrated member with crank shaft 22.Crank shaft 22 can be made for the material of bicycle crank axle by tradition, such as aluminium, steel etc.

As shown in Figures 2 and 3, motor 24 has the central through hole 48 extended through for crank shaft 22.Central through hole 48 is arranged on the rotating center section of motor 24.It is coaxial with the rotation axis of crank shaft 22 that motor 24 is set to its rotation axis.Motor 24 comprises for example the first rotor of the first housing 50, the second housing 52, rotor 54() and stator 56(the first stator for example).In the illustrated embodiment, as shown in Figure 3 and Figure 4, crank shaft 22 and the first housing 50 are formed integrally as the single type integrated member.Therefore, the first housing 50 is not connected to crank shaft 22 revolvably.The second housing 52 is not connected to intermediate axle housing 14 revolvably.Especially, the second housing 52 is not connected to the first axis 20 revolvably.Rotor 54 has for example the first magnet of a plurality of magnet 58().Rotor 54 functionally is connected to the first end 44 of crank shaft 22 and is configured on the first housing 50.Particularly, the magnet 58 of rotor 54 is configured on the first housing 50.Stator 56 is not connected to the first axis 20 revolvably.Especially, stator 56 is bearing on the first axis 20.Stator 56(is the first stator for example) there are a plurality of stator tooths 62 that are fixedly attached to the first axis 20 and be wrapped in a plurality of winding wires 64 on stator tooth 62.The stator tooth 62 of magnet 58 and stator 56 radially faces with each other about the rotation axis X1 of crank shaft 22.In the illustrated embodiment, motor 24 is three-phase dc motor.Certainly, those skilled in the art will know that from the utility model motor 24 can or have the brush Direct Current Motor for the brushless of other types.In the illustrated embodiment, as shown in Figures 2 and 3, motor 24 is external-rotor motor.In other words, motor 24 has the outer rotor component radially outward configured with respect to the internal stator assembly.

As shown in Figure 4, the first housing 50 is for having the cardinal principle cup-shaped member of perimembranous or sidewall 66.The first housing 50 is formed integrally as the single type integrated member with crank shaft 22.The first housing 50 can not rotate and can not be connected to crank shaft 22 with dismantling.Especially, the first housing 50 is not connected to crank shaft 22 revolvably, so that the rotation of crank shaft 22 can be directly delivered to the first housing 50.Crank shaft 22 extends through the first housing 50 so that first end 44 axially reaches the first housing 50 outsides.The second end 46 of crank shaft 22 axially reaches intermediate axle housing 14 outsides.The first housing 50 can be made for the material of motor shell by tradition, such as aluminium, steel etc.

As shown in Figure 4, the second housing 52 is the cardinal principle discoid component.The second housing 52 has the central through hole 52a through configuration for the first axis 20.The second housing 52 is not connected to intermediate axle housing 14 revolvably.Especially, the second housing 52 is not revolvably and be fixedly coupled to the axial middle part of the first axis 20 between the first axial end portion 20a and the second axial end portion 20b.Therefore, when the first housing 50 rotates around rotation axis X1, the second housing 52 is static with respect to the first axis 20.In the illustrated embodiment, the second housing 52 is fixedly coupled to the first axis 20 in a usual manner, such as being pressed into cooperation, be threaded, welding etc.Alternatively, the second housing 52 can be formed integrally as the single type integrated member with the first axis 20.The second housing 52 can be made for the material of motor shell by tradition, such as aluminium, steel etc.The second housing 52 has the diameter of the internal diameter of the perimembranous 66 that is substantially equal to or is slightly less than the first housing 50.Therefore, as shown in Figure 3, when the edge of the perimembranous 66 of the second housing 52 and the first housing 50 is axially aligned, the second housing 52 radially inwardly arranges with respect to the perimembranous 66 of the first housing 50.In addition, in the illustrated embodiment, motor 24 also has sealing member 24a between the first housing 50 and the second housing 52 to limit seal cavity 24b.Sealing member 24a can be dubbing such as silicone grease, wheel shape or lip ring such as O shape ring etc.Therefore rotor 54 and stator 56 are arranged in seal cavity 24b with waterproof type.

As shown in Figure 2 and Figure 4, magnet 58 is configured on the perimembranous 66 of the first housing 50.Particularly, it is upper that magnet 58 is configured in the inner peripheral surface 66b of perimembranous 66 of the first housing 50, so that magnet 58 and stator 56 radially face with each other about the rotation axis X1 of crank shaft 22.Inner peripheral surface 66b is the radially apparent surface with respect to the outer peripheral face 66a of the perimembranous 66 of the first housing 50.Magnet 58 is fixedly attached to the inner peripheral surface 66b of the perimembranous 66 of the first housing 50.In the illustrated embodiment, the magnet 58 of rotor 54 utilizes adhesives to be fixedly attached to the inner peripheral surface 66b of the perimembranous 66 of the first housing 50.Especially, as shown in Figure 2, magnet 58 arranges circumferentially along the inner peripheral surface 66b of perimembranous 66.In the illustrated embodiment, rotor 54 has 12 magnet 58.Yet certainly,, rotor 54 can have the magnet 58 greater or less than 12.Rotor 54 can be supported rotatably with respect to stator 56.Especially, rotor 54 radially outward arranges about rotation axis X1 with respect to stator 56, thereby forms the outer rotor-type motor.

As shown in Figure 2 and Figure 4, the stator tooth 62 of stator 56 arranges circumferentially along the outer peripheral face of the second axial end portion 20b of the first axis 20.In the illustrated embodiment, stator 56 has 12 stator tooths 62.Yet certainly,, stator 56 can have the stator tooth 62 greater or less than 12.Stator tooth 62 is fixedly coupled to the second axial end portion 20b of the first axis 20.Winding wire 64 is wrapped on stator tooth 62 respectively in a usual manner.

In the illustrated embodiment, motor 24 is driven by the changer (not shown), and changer is driven by the motor controller (not shown).Motor controller is according to the power that scrunches and the speed control change device of bicycle.More particularly, motor controller is electrically connected to stator 56, and can together with stator 56, be configured in seal cavity 24b.Because motor 24 is outer rotor-type motors, so can make the driving torque of motor 24 larger.Alternatively or alternatively, motor 24 can be configured to not have retarder.Therefore can make the weight of motor 24 lighter.

As shown in Figure 2 and Figure 4, output link attachment 26 is fixedly coupled to the second end 46 of crank shaft 22.Output link attachment 26 comprises for output link 28 being connected to the spoke arm of crank shaft 22.Particularly, as shown in Figure 1, output link attachment 26 has 5 arm 26b, and between them, with equal intervals, the rotation axis X1 around bicycle drive unit 12 arranges circumferentially.The arm 26b of output link attachment 26 extends radially outwardly from the central part of output link attachment 26 respectively.Each arm 26b has through hole 26a at the end of each arm 26b.The central part of output link attachment 26 has central through hole, and this central through hole has the sawtooth mated with the sawtooth grooves of crank shaft 22.Utilize this sawtooth to connect, output link attachment 26 is not connected to crank shaft 22 revolvably.Certainly, output link attachment 26 can be connected to different usual manners crank shaft 22, such as being pressed into cooperation, be threaded, welding etc.In the illustrated embodiment, output link attachment 26 is the parts that separate with the first crank arm 30.Yet output link attachment 26 can be formed integrally as the single type integrated member with the first crank arm 30, so that the second crank arm 32 comprises output link attachment 26.In addition, in the illustrated embodiment, output link attachment 26 has 5 arm 26b.Yet as needed and/or desired, the quantity of arm 26b can be greater or less than 5.

Output link 28 can be connected to output link attachment 26 with dismantling, so that motor 24 will rotate output, is delivered to output link 28.Particularly, in the illustrated embodiment, output link 28 functionally is connected to the second end 46 of crank shaft 22, so that the first motor 24 will rotate output via crank shaft 22, is delivered to output link 28.Output link 28 comprises for example chain link of the first chain link 70a, the second chain link 70b and the 3rd chain link 70c(), they utilize fastener 72(referring to Fig. 1) can be connected to output link attachment 26 with dismantling.In the illustrated embodiment, as shown in Figure 3 and Figure 4, the first chain link 70a to the three chain link 70c can be connected to output link attachment 26 with dismantling, so that the distance member of output link attachment 26 axially is configured in respectively between the first chain link 70a and the second chain link 70b and between the second chain link 70b and the 3rd chain link 70c.In the illustrated embodiment, fastener 72 is configured to the through hole 26a through attachment hole and the output link attachment 26 of the first chain link 70a to the three chain link 70c.Fastener 72 is fastened to output link attachment 26 by the first chain link 70a to the three chain link 70c, thereby the first chain link 70a to the three chain link 70c are fastened firmly to crank shaft 22.Therefore, the first chain link 70a to the three chain link 70c and crank shaft 22 rotate integratedly.Fastener 72 comprises for conventional chain link being fastened to the conventional clamp structure of conventional bicycle crank arm.Therefore, will omit for simplicity the detailed description of fastener 72.Yet in the illustrated embodiment, each fastener 72 comprises pair of bolts and nut.Therefore, utilize this bicycle drive unit 12, the first chain link 70a to the three chain link 70c freely to change.

In the illustrated embodiment, the first crank arm 30 is not connected to the first end 44 of crank shaft 22 revolvably, and the second crank arm 32 is not connected to the second end 46 of crank shaft 22 revolvably.In addition, the first crank arm 30 and the second crank arm 32 can be connected to first end 44 and the second end 46 of crank shaft 22 respectively with dismantling.The first crank arm 30 and the second crank arm 32 can be conventional bicycle crank arms, and can not be connected to revolvably in a usual manner crank shaft 22.Alternatively or alternatively, the first crank arm 30 can be fixedly coupled to the axial external surface of the first housing 50, or can be formed integrally as the single type integrated member with the first housing 50.In addition, the first crank arm 30 and the second crank arm 32 each can comprise two-part construction.Especially, the first crank arm 30 and the second crank arm 32 each within it section comprise hollow structure.

As shown in Figure 3 and Figure 4, bearing unit 34 can support crank shaft 22 rotatably with respect to the first axis 20.Especially, bearing unit 34 radially is configured between crank shaft 22 and the first axis 20.Particularly, bearing unit 34 is configured on the inner peripheral surface of the second axial end portion 20b of the first axis 20.On the other hand, as shown in Figure 3, bearing unit 35 can support crank shaft 22 rotatably with respect to the second axis 21.Especially, bearing unit 35 radially is configured between crank shaft 22 and the second axis 21.Particularly, bearing unit 35 is configured in the first axial end portion 21a of the second axis 21 axially on the inner peripheral surface of the second axial end portion 21b of the second relative axis 21.The second axis 21 has external thread part 41, and it is configured to the internal thread part 43 of thread connection to intermediate axle housing 14.In the illustrated embodiment, external thread part 41 is formed on the outer peripheral face of the first axial end portion 21a of the second axis 21.Utilize this structure, the second axis 21 is not connected to intermediate axle housing 14 revolvably and threadably.

Crank shaft 22 can be supported rotatably by bearing unit 34 and bearing unit 35, and bearing unit 34 and bearing unit 35 axially arrange at certain intervals along rotation axis X1, so that crank shaft 22 rotates around rotation axis X1 with respect to intermediate axle housing 14.Bearing unit 34 and bearing unit 35 are the conventional bearing units that comprise ball bearing of main shaft or cylindrical bearing.Especially, as shown in Figure 4, bearing unit 34 comprises cylindrical inner ring 34a and a plurality of ball or roller 34b.Inner ring 34a is the second axial end portion 20b place at the first axis 20 in the first axis 20 internal configurations.Inner ring 34a is connected to crank shaft 22 regularly and not revolvably.Ball 34b is configured between the second axial end portion 20b of inner ring 34a and the first axis 20.Ball 34b can support inner ring 34a rotatably with respect to the first axis 20, thereby can support rotatably crank shaft 22 with respect to the first axis 20.In addition, as shown in Figure 3, bearing unit 35 comprises cylindrical inner ring 35a and a plurality of ball or roller 35b.Inner ring 35a is the second axial end portion 21b place at the second axis 21 in the second axis 21 internal configurations.Inner ring 35a is connected to crank shaft 22 regularly and not revolvably.Ball 35b is configured between the second axial end portion 21b of inner ring 35a and the second axis 21.Ball 35b can support inner ring 35a rotatably with respect to the second axis 21, thereby can support rotatably crank shaft 22 with respect to the second axis 21.Utilize bearing unit 34 and bearing unit 35, the first axis 20 and the second axis 21 to be used separately as the outer ring of bearing unit 34 and bearing unit 35.Yet those skilled in the art will know that from the utility model bearing unit 34 and bearing unit 35 can comprise respectively the outer ring as the member separated with the second axis 21 with the first axis 20.

Utilize bicycle drive unit 12, the power that scrunches acted on the first crank arm 30 and the second crank arm 32 is delivered to output link 28 via crank shaft 22 and output link attachment 26.In addition, as shown in the arrow in Fig. 5, the rotation of motor 24 output is delivered to output link 28 via the first housing 50, crank shaft 22 and output link attachment 26 from motor 24.In the illustrated embodiment, crank shaft 22 or output link attachment 26 will combine as auxiliary power with the rotation output of motor 24 from the power that scrunches of the first crank arm 30 and the second crank arm 32, to assist rider's riding bicycle 10.Especially, the rotation of output link 28 output is delivered to via chain the rear sprocket wheel that the rear wheel boss shaft around trailing wheel can configure rotatably.Alternatively or additionally, bicycle drive unit 12 also can comprise the gear mechanism combined with the rotation output of motor 24 for scrunching power.

Utilize bicycle drive unit 12, the rotation axis of the rotation axis of crank shaft 22 and motor 24 arranges coaxially to each other.Therefore, can make bicycle drive unit 12 compacter.

Bicycle drive unit 12 can only be attached to bicycle 10 by the intermediate axle housing 14 that the first axis 20 is threadably fastened to bicycle 10.Therefore, bicycle drive unit 12 can be easily mounted to conventional cycle frame.In addition, bicycle drive unit 12 can be easily from intermediate axle housing 14 dismountings of bicycle 10, and this makes the maintenance of bicycle drive unit 12 easier.

Utilize bicycle drive unit 12, rotor 54 and stator 56 radially face with each other.Therefore, motor 24 can produce larger torque.

In the illustrated embodiment, the rotation of motor 24 output is not delivered to output link 28 via crank shaft 22 with slowing down.Yet motor 24 can comprise reduction gear unit, it changed the rotative speed of motor 24 before the power that scrunches with from the first crank arm 30 and the second crank arm 32 is combined.

In the illustrated embodiment, as shown in Figure 3 and Figure 4, the first housing 50 is formed integrally as the single type integrated member with crank shaft 22.Yet utilizing bicycle drive unit 12, the first housings 50 can be the parts that separate with crank shaft 22.Especially, the first housing 50 can be not revolvably and can be connected to crank shaft 22 with dismantling.Particularly, as shown in Figure 6 and Figure 7, crank shaft 22 can be connected to the central part 50b of the first housing 50 with dismantling.Crank shaft 22 has for example outer sawtooth of sawtooth grooves 22a().The first housing 50 have sawtooth 50a(for example in sawtooth), it is formed on the inside face 50c of central part 50b of the first housing 50.The sawtooth 50a of the first housing 50 is not connected to the sawtooth grooves 22a of crank shaft 22 revolvably.The sawtooth 50a of the first housing 50 can be connected to crank shaft 22 with dismantling.Especially, crank shaft 22 extends through the central part 50b of the first housing 50, so that the sawtooth 50a of the sawtooth grooves 22a of crank shaft 22 and the first housing 50 engagement.Therefore, the first housing 50 is not connected to crank shaft 22 revolvably, so that the rotation of crank shaft 22 can be directly delivered to the first housing 50.Crank shaft 22 extends through the first housing 50 so that first end 44 axially reaches the first housing 50 outsides.The second end 46 of crank shaft 22 axially reaches intermediate axle housing 14 and output link attachment 26 outsides.In the illustrated embodiment, crank shaft 22 utilizes and is connected to the first housing 50 between sawtooth grooves 22a and sawtooth 50a with being connected and fixed.Certainly, those skilled in the art will know that from the utility model crank shaft 22 can not be connected to the first housing 50 in a different manner revolvably, such as being pressed into cooperation, be threaded, welding etc.

The second embodiment

With reference now to Fig. 8,, the bicycle drive unit 112 according to the second embodiment will be described now.Bicycle drive unit 112 is basically identical with bicycle drive unit 12, except bicycle drive unit 112 as described below comprises a pair of motor of two axial ends that are attached to crank shaft.Bicycle drive unit 112 is attached to the intermediate axle housing 114 of the cycle frame of bicycle 110.Intermediate axle housing 114 is basically identical with the intermediate axle housing 14 according to the first embodiment.

In view of the similarity between the first embodiment and the second embodiment, to the parts with the first embodiment of the second embodiment, identical parts will give the reference marker identical with the parts of the first embodiment.And, will give identical reference marker to this second embodiment with parts identical and/or substantially the same on component function the first embodiment, just it has been increased to " 100 ".Under any circumstance, may omit for simplicity the description of the parts substantially the same to the parts with the first embodiment of the second embodiment.Yet those skilled in the art will know that from the utility model the description of the first embodiment and diagram also are applicable to this second embodiment, except this paper discussion and/or graphic.

As shown in Figure 8, bicycle drive unit 112 consists essentially of the first axis 120, the second axis 121, crank shaft 122 and the first motor 124.In addition, bicycle drive unit 112 also comprises the second motor 125.Bicycle drive unit 112 also comprises the second motor 125, a plurality of output link attachment 126, output link 128, the first crank arm 130, the second crank arm 132 and pair of bearings unit 134 and 135.In the illustrated embodiment, the first axis 120, the second axis 121, crank shaft 122, the first motor 124, the first crank arm 130, the second crank arm 132 and

bearing unit

134 and 135 are substantially the same with the first axis 20, the second axis 21, crank shaft 22, motor 24, the first crank arm 30, the second crank arm 32 and

bearing unit

34 and 35 according to the first embodiment respectively.Therefore, will omit for simplicity the detailed description of these parts.

In the illustrated embodiment, utilize bicycle drive unit 112, the rotation axis of the rotation axis of crank shaft 122, the first motor 124 and the rotation axis of the second motor 125 arrange coaxially with each other.Hereinafter, by this, consistent rotation axis is called the rotation axis X1 of bicycle drive unit 112.

As shown in Figure 8, the first axis 120 is configured to be connected to the first axial end 114a of intermediate axle housing 114, and the second axis 121 is configured to be connected to the second axial end 114b of intermediate axle housing 114.The second axial end 114b of intermediate axle housing 114 is relative with the first axial end 114a along the rotation axis X1 of bicycle drive unit 112.The second axis 121 is substantially the same with the first axis 120.The second axis 121 arranges symmetrically with respect to the first axis 120 mirror images.The second axis 121 can support crank shaft 122 via bearing unit 135 rotatably with respect to the intermediate axle housing 114 of bicycle 110.Especially, as shown in Figure 8, the second axis 121 has external thread part 141, and it is configured to the internal thread part 143 of thread connection to intermediate axle housing 114.In the illustrated embodiment, external thread part 141 is formed on the outer peripheral face of the first axial end portion 121a of the second axis 121.Utilize this structure, the second axis 121 is not connected to intermediate axle housing 114 revolvably and threadably.Yet those skilled in the art will know that from the utility model the second axis 121 can be connected to different usual manners intermediate axle housing 114.In addition, bicycle drive unit 212 has axial the second relative axial end portion 121b with the first axial end portion 121a.In the illustrated embodiment, the first axial end portion 121a is contained in intermediate axle housing 114, and the second axial end portion 121b axially is configured in intermediate axle housing 114 outsides.The second axis 121 can be made for the material of bicycle middle shaft by tradition, such as aluminium, steel etc.

Crank shaft 122 can be supported rotatably by the second axis 121.Crank shaft 122 is substantially the same with the crank shaft 22 according to the first embodiment, except can be longer for the second motor 125 axially being arranged between intermediate axle housing 114 and the second crank arm 132 than crank shaft 22.As shown in Figure 8, crank shaft 122 axially extends through the first motor 124, the first axis 120, intermediate axle housing 114, the second axis 121 and the second motor 125.Crank shaft 122 has first end 144 and the second end 146 that axially reaches respectively the first motor 124 and the second motor 125 outsides.The first crank arm 130 can be connected to the first end 144 of crank shaft 122 with dismantling, and the second crank arm 132 can be connected to the second end 146 of crank shaft 122 with dismantling.In the illustrated embodiment, the first crank arm 130 and the second crank arm 132 can be connected to first end 144 and the second end 146 respectively in a usual manner with dismantling, such as being pressed into cooperation, be threaded, welding etc.Alternatively or alternatively, one in the first crank arm 130 and the second crank arm 132 can not be connected to crank shaft 122 with dismantling.For example, the first crank arm 130 can be formed integrally as the single type integrated member with crank shaft 122.Crank shaft 122 can be made for the material of bicycle crank axle by tradition, such as aluminium, steel etc.

As shown in Figure 8, the second motor 125 has the central through hole 149 extended through for crank shaft 122.Central through hole 149 is arranged on the rotating center section of the second motor 125.It is coaxial with the rotation axis of crank shaft 122 that the second motor 125 is set to its rotation axis.The second motor 125 is substantially the same with the first motor 124, and therefore identical with the motor 24 according to the first embodiment.The second motor 125 arranges about intermediate axle housing 114 mirror images symmetrically with respect to the first motor 124.Therefore, will omit the detailed description to the second motor 125 for simplicity.The second motor 125 comprises all features of motor 24 and the first motor 124.In addition, the second motor 125 has the output link attachment 126 that output link 128 is attached to the second motor 125.

As shown in Figure 8, the second motor 125 comprises the 3rd housing 151, the 4th housing 153, the second rotor 155, the second stator 157.The 3rd housing 151 is not connected to crank shaft 122 revolvably.The 4th housing 153 is fixedly coupled to the second axis 121.The second rotor 155 has a plurality of (for example 12) the second magnet 159.The second rotor 155 is configured on the perimembranous 167 of the 3rd housing 151.The second stator 157 is bearing on the second axis 121 and is not connected to revolvably the second axis 121.The second stator 157 has a plurality of (for example 12) stator tooth 163 that is fixedly attached to the second axis 21 and is wrapped in a plurality of winding wires 165 on stator tooth 163.The stator tooth 163 of the second magnet 159 and the second stator 157 radially faces with each other about the rotation axis X1 of crank shaft 122.In the illustrated embodiment, the 3rd housing 151, the 4th housing 153, the second rotor 155 and the second stator 157 are substantially the same with the first housing 50, the second housing 52, rotor 54 and stator 56 according to the first embodiment.Therefore, will omit detailed description for simplicity.In addition, stator tooth 62 and the winding wire 64 of the magnet 58 of the stator tooth 163 of the second magnet 159 of the second rotor 155 and the second stator 157 and winding wire 165 and rotor 54 according to the first embodiment and stator 56 are also substantially the same.Therefore, will omit detailed description for simplicity.In the illustrated embodiment, the first motor 124 and the second motor 125 are three-phase dc motor.Certainly, those skilled in the art will know that from the utility model the first motor 124 and the second motor 125 can or have the brush Direct Current Motor for the brushless of other types.In the illustrated embodiment, the first motor 124 and the second motor 125 are external-rotor motor.In other words, the first motor 124 and the second motor 125 have the outer rotor component radially outward configured with respect to the internal stator assembly.

In the illustrated embodiment, the first motor 124 and the second motor 125 are driven by the changer (not shown), and changer is driven by the motor controller (not shown).Motor controller is according to the power that scrunches and the speed control change device of bicycle.More specifically, motor controller is electrically connected to the first motor 124 and the second motor 125.

As shown in Figure 8, output link attachment 126 is configured on the outer peripheral face 167a of perimembranous 167 of the 3rd housing 151.Between them, with equal intervals, the outer peripheral face 167a along perimembranous 167 arranges output link attachment 126 circumferentially.Output link attachment 126 use adhesivess or any other suitable mode are connected to the outer peripheral face 167a of perimembranous 167 securely, so that output link attachment 126 is rotated together with the 3rd housing 151.In the illustrated embodiment, 5 output link attachment 126 are fixedly coupled to the 3rd housing 151.Yet the quantity of output link attachment 126 can be as needed and/or desired greater or less than 5.Output link attachment 126 has respectively through hole 126a.Output link 128 can be connected to the 3rd housing 151 with dismantling, so that the second motor 125 will rotate output, is delivered to output link 128.Especially, output link 128 can be connected to output link attachment 126 with dismantling, so that the second motor 125 will rotate output, is delivered to output link 128.Output link 128 comprises for example chain link of the first chain link 170a and the second chain link 170b(), they utilize fastener 172 can be connected to output link attachment 126 with dismantling.In the illustrated embodiment, as shown in Figure 8, the first chain link 170a and the second chain link 170b can be connected to output link attachment 126 with dismantling, so that output link attachment 126 axially is configured between the first chain link 170a and the second chain link 170b.In the illustrated embodiment, fastener 172 is configured to the through hole 126a through attachment hole and the output link attachment 126 of the first chain link 170a and the second chain link 170b.Fastener 172 is fastened to output link attachment 126 by the first chain link 170a and the second chain link 170b, thereby the first chain link 170a and the second chain link 170b is fastened firmly to the 3rd housing 151 of the second motor 125.Therefore, the 3rd housing 151 of the first chain link 170a and the second chain link 170b and the second motor 125 and crank shaft 122 rotate integratedly.Fastener 172 comprises for conventional chain link being fastened to the conventional clamp structure of conventional bicycle crank arm.Therefore, will omit for simplicity the detailed description of fastener 172.Yet in the illustrated embodiment, each fastener 172 comprises pair of bolts and nut.Therefore, utilize bicycle drive unit 112, the first chain link 170a and the second chain link 170b freely to change.

Utilize bicycle drive unit 112, the power that scrunches on the first crank arm 130 and the second crank arm 132 of acting on is delivered to output link 128 via the 3rd housing 151 of crank shaft 122 and the second motor 125.On the other hand, as shown in the arrow in Fig. 8, the rotation of the first motor 124 output is delivered to output link 128 via the first housing 150, crank shaft 122 and the 3rd housing 151 of the first motor 124 from the first motor 124.In addition, as shown in the arrow in Fig. 8, the rotation of the second motor 125 output is delivered to output link 128 via the 3rd housing 151 from the second motor 125.In the illustrated embodiment, the 3rd housing 151 of the second motor 125 will combine as auxiliary power with the rotation output of the first motor 124 and the second motor 125 from the power that scrunches of the first crank arm 130 and the second crank arm 132, to assist rider's riding bicycle 110.Especially, the rotation of output link 128 output is delivered to via chain the rear sprocket wheel that the rear wheel boss shaft around trailing wheel can configure rotatably.Alternatively or additionally, bicycle drive unit 112 also can comprise the gear mechanism combined with the rotation output of the first motor 124 and the second motor 125 for scrunching power.

Utilize bicycle drive unit 112, because the first motor 124 and the second motor 125 are provided for producing auxiliary power, so can obtain larger auxiliary power, or in order to produce identical auxiliary power, each that can make the first motor 124 and the second motor 125 is less.

The 3rd embodiment

With reference now to Fig. 9 and Figure 10,, the bicycle drive unit 212 according to the 3rd embodiment will be described now.Bicycle drive unit 212 is substantially the same with bicycle drive unit 12, except bicycle drive unit 212 as described below comprises the rotor and stator be contained in respectively in seal cavity.Bicycle drive unit 212 is attached to the intermediate axle housing 214 of the cycle frame of bicycle 210.Intermediate axle housing 214 is substantially the same with the intermediate axle housing 14 according to the first embodiment.

In view of the similarity between the first embodiment and the 3rd embodiment, to the parts with the first embodiment of the 3rd embodiment, identical parts will give the reference marker identical with the parts of the first embodiment.And, will give identical reference marker to the 3rd embodiment with parts identical and/or substantially the same on component function the first embodiment, just it has been increased to " 200 ".Under any circumstance, may omit for simplicity the description of the parts substantially the same to the parts with the first embodiment of the 3rd embodiment.Yet those skilled in the art will know that from the utility model the description of the first embodiment and diagram also are applicable to the 3rd embodiment, except this paper discussion and/or graphic.

As shown in Figure 9, bicycle drive unit 212 consists essentially of the first axis 220, the second axis 221, crank shaft 222 and motor 224.In addition, bicycle drive unit 212 comprises output link attachment 226, output link 228, the first crank arm 230, the second crank arm 232 and pair of bearings unit 234 and 235.The first axis 220, the second axis 221, crank shaft 222, output link attachment 226, output link 228, the first crank arm 230, the second crank arm 232 and bearing unit 234 and 235 are substantially the same with the first axis 20, the second axis 21, crank shaft 22, output link attachment 26, output link 28, the first crank arm 30, the second crank arm 32 and bearing unit 34 and 35 according to the first embodiment respectively.Therefore, will omit for simplicity the detailed description of these parts.In the illustrated embodiment, the first axis 220 is connected to the first axial end of intermediate axle housing 214, and the second axis 221 is connected to second axial end relative with the first axial end of intermediate axle housing 214.The second axis 221 is identical with the first axis 220, arranging symmetrically about intermediate axle housing 214 mirror images with respect to the first axis 220 except the second axis 221.In the illustrated embodiment, the first axis 220 can support crank shaft 222 rotatably via bearing unit 234, and the second axis 221 can support crank shaft 222 rotatably via the bearing unit 235 in bearing unit 234 axially-spaced locations.In the illustrated embodiment, the first crank arm 230 can be connected to the first end 244 of crank shaft 222 with dismantling, and the second crank arm 232 can be connected to the second end 246 of crank shaft 222 with dismantling.

As shown in figure 10, motor 224 is substantially the same with the motor 24 according to the first embodiment, except as the feature illustrated below.Utilize bicycle drive unit 212, the rotation axis of the rotation axis of crank shaft 222 and motor 224 arranges coaxially with each other.Hereinafter, by this, consistent rotation axis is called the rotation axis X1 of bicycle drive unit 212.In the illustrated embodiment, motor 224 has the central through hole 248 extended through for crank shaft 222.Central through hole 248 is arranged on the rotating center section of motor 224.It is coaxial with the rotation axis of crank shaft 222 that motor 224 is set to its rotation axis.As shown in figure 10, motor 224 comprises for example the first rotor of the first housing 250, the second housing 252, rotor 254() and stator 256(the first stator for example).Basically, crank shaft 222 and the first housing 250 are formed integrally as the single type integrated member.Therefore, the first housing 250 is not connected to crank shaft 222 revolvably.The second housing 252 is not connected to intermediate axle housing 214 revolvably.Rotor 254 has for example the first magnet of a plurality of magnet 258(of being configured on the first housing 250).Stator 256 is not connected to the first axis 220 revolvably.Stator 256(is the first stator for example) there are a plurality of stator tooths 262 that are fixedly attached to the first axis 220 and be wrapped in a plurality of winding wires 264 on stator tooth 262.The stator tooth 262 of magnet 258 and stator 256 radially faces with each other about the rotation axis X1 of crank shaft 222.In the illustrated embodiment, motor 224 is three-phase dc motor.Certainly, those skilled in the art will know that from the utility model motor 224 can or have the brush Direct Current Motor for the brushless of other types.In the illustrated embodiment, motor 224 is external-rotor motor.In other words, motor 224 has the outer rotor component radially outward configured with respect to the internal stator assembly.

In the illustrated embodiment, as shown in figure 10, the first housing 250 has magnet containing component 274.The second housing 252 has stator containing component 276.Magnet containing component 274 is by magnet 258(the first magnet for example) be contained in the inner space 274a of magnet containing component 274.Stator containing component 276 is by stator 256(the first stator for example) be contained in the inner space 276a of stator containing component 276.In the illustrated embodiment, the stator containing component 276 of the magnet containing component 274 of the first housing 250 and the second housing 252 is made by non-magnetic material.In the illustrated embodiment, as shown in figure 10, motor 224 comprise magnet containing component 274 and stator containing component 276 both.Yet those skilled in the art will know that from the utility model motor 224 can only comprise magnet containing component 274 and stator containing component 276.

As shown in figure 10, the first housing 250 is substantially the same with the first housing 50 according to the first embodiment, except the first housing 250 also has magnet containing component 274.Magnet containing component 274 is essentially annular component 282, and has flange 284 at the axial end of annular component 282.Annular component 282 axially extends along the rotation axis X1 of bicycle drive unit 212, and flange 284 extends radially outwardly from the axial end of annular component 282.Magnet containing component 274 utilizes adhesives to be fixedly coupled to the perimembranous 266 of the first housing 250.In the illustrated embodiment, flange 284 has the external diameter of the internal diameter of the perimembranous 266 that is substantially equal to or is slightly less than the first housing 250.In addition, annular component 282 has the axial dimension of the internal depth that is substantially equal to the first housing 250 of measuring along the rotation axis X1 of bicycle drive unit 212.Certainly, those skilled in the art will know that from the utility model magnet containing component 274 can be connected to the first housing 250 in a different manner, such as being pressed into cooperation, be threaded, welding etc.Magnet containing component 274 radially inwardly is configured on perimembranous 266 with respect to perimembranous 266, to limit the inner space 274a of magnet containing component 274 around the rotation axis X1 of bicycle drive unit 212 between them.Inner space 274a is for waterproof type, magnet 258 being held to seal cavity within it.The magnet 258 of rotor 254 is identical with the magnet 58 of the rotor 54 according to the first embodiment.To omit detailed description for simplicity.

As shown in figure 10, the second housing 252 is substantially the same with the second housing 52 according to the first embodiment, except the second housing 252 also has stator containing component 276.Stator containing component 276 is essentially annular component 286, and has bottom 288 at the axial end of annular component 286.Annular component 286 axially extends along the rotation axis X1 of bicycle drive unit 212, and bottom 288 extends radially inwardly from the axial end of annular component 286.Stator containing component 276 utilizes adhesives to be fixedly coupled to the second housing 252.In the illustrated embodiment, the annular component 286 of stator containing component 276 has the external diameter of the internal diameter of the annular component 282 that is slightly less than magnet containing component 274.Therefore, as shown in Figure 9, magnet containing component 274 and stator containing component 276 radially face with each other.Especially, stator containing component 276 radially inwardly arranges with respect to magnet containing component 274.In addition, in the illustrated embodiment, bottom 288 has the central through hole 288a through configuration for the first axis 220.Central through hole 288a has the internal diameter of the external diameter that is substantially equal to or is slightly larger than the first axis 220.Certainly, those skilled in the art will know that from the utility model stator containing component 276 can be connected to the second housing 252 in a different manner, such as being pressed into cooperation, be threaded, welding etc.Stator containing component 276 radially outward is configured on the first axis 220, limits the annular internal space 276a of stator containing component 276 with the rotation axis X1 around bicycle drive unit 212.Inner space 276a is for waterproof type, stator 256 being held to seal cavity within it.Stator 256 is identical with the stator 56 according to the first embodiment.To omit detailed description for simplicity.

Utilize bicycle drive unit 212, the power that scrunches acted on the first crank arm 230 and the second crank arm 232 is delivered to output link 228 via crank shaft 222 and output link attachment 226.In addition, the rotation of motor 224 output is delivered to output link 228 via the first housing 250, crank shaft 222 and output link attachment 226 from motor 224.In the illustrated embodiment, crank shaft 222 or output link attachment 226 will scrunch power and combine as auxiliary power with the rotation output of motor 224, to help rider's riding bicycle 210.Especially, the rotation of output link 228 output is delivered to via chain the rear sprocket wheel that the rear wheel boss shaft around trailing wheel can configure rotatably.Alternatively or additionally, bicycle drive unit 212 also can comprise the gear mechanism combined with the rotation output of motor 224 for scrunching power.

In the illustrated embodiment, as long as magnet containing component 274 is contained in magnet 258 in the inner space 274a of magnet containing component 274, and stator containing component 276 is contained in stator 56 in the inner space 276a of stator containing component 276, and the shape of magnet containing component 274 and stator containing component 276 is not restricted to shape as shown in figure 10.In addition, magnet containing component 274 forms independent parts independently in the illustrated embodiment.Yet magnet containing component 274 can be formed integrally as the single type integrated member with the first housing 250.And stator containing component 276 forms independent parts independently in the illustrated embodiment.Yet stator containing component 276 can be formed integrally as the single type integrated member with the second housing 252.

In addition, in the illustrated embodiment, the stator containing component 276 of the magnet containing component 274 of the first housing 250 and the second housing 252 is made by non-magnetic material, such as copper, aluminium or other non-magnetic materials and synthetic resin etc.Certainly those skilled in the art will know that from the utility model the first housing 250 and the second housing 252 also can be made by non-magnetic material.

In the illustrated embodiment, as shown in Figure 9 and Figure 10, the first housing 250 is formed integrally as the single type integrated member with crank shaft 222.Yet utilizing bicycle drive unit 212, the first housings 250 can be the parts that separate with crank shaft 222.Especially, the first housing 250 can be not revolvably and can be connected to crank shaft 222 with dismantling.Particularly, as shown in Figure 11 and Figure 12, crank shaft 222 can be connected to the central part 250b of the first housing 250 with dismantling.Crank shaft 222 has for example outer sawtooth of sawtooth grooves 222a().The first housing 250 have sawtooth 250a(on the inside face 250c of the central part 250b that is formed on the first housing 250 for example in sawtooth).The sawtooth 250a of the first housing 250 is not connected to the sawtooth grooves 222a of crank shaft 222 revolvably.The sawtooth 250a of the first housing 250 can be connected to crank shaft 222 with dismantling.Especially, crank shaft 222 extends through the central part 250b of the first housing 250, so that the sawtooth 250a of the sawtooth grooves 222a of crank shaft 222 and the first housing 250 engagement.Therefore, the first housing 250 is not connected to crank shaft 222 revolvably, so that the rotation of crank shaft 222 can be directly delivered to the first housing 250.Crank shaft 222 extends through the first housing 250, so that first end 244 axially reaches the first housing 250 outsides.The second end 246 of crank shaft 222 axially reaches intermediate axle housing 214 and output link attachment 226 outsides.In the illustrated embodiment, crank shaft 222 by being connected to the first housing 250 between sawtooth grooves 222a and sawtooth 250a with being connected and fixed.Certainly, those skilled in the art will know that from the utility model crank shaft 222 can not be connected to the first housing 250 in a different manner revolvably, such as being pressed into cooperation, be threaded, welding etc.

The 4th embodiment

With reference now to Figure 13 and Figure 14,, the bicycle drive unit 312 according to the 4th embodiment will be described now.Bicycle drive unit 312 is basically identical with bicycle drive unit 12, except bicycle drive unit 312 as described below comprises the rotor and stator axially faced with each other.Bicycle drive unit 312 is attached to the intermediate axle housing 314 of the cycle frame of bicycle 310.Intermediate axle housing 314 is substantially the same with the intermediate axle housing 14 according to the first embodiment.

In view of the similarity between the first embodiment and the 4th embodiment, to the parts with the first embodiment of the 4th embodiment, identical parts will give the reference marker identical with the parts of the first embodiment.And, will give identical reference marker to the 4th embodiment with parts identical and/or substantially the same on component function the first embodiment, just it has been increased to " 300 ".Under any circumstance, may omit for simplicity the description of the parts substantially the same to the parts with the first embodiment of the 4th embodiment.Yet those skilled in the art will know that from the utility model the description of the first embodiment and diagram also are applicable to the 4th embodiment, except this paper discussion and/or graphic.

As shown in figure 13, bicycle drive unit 312 consists essentially of the first axis 320, the second axis 321, crank shaft 322 and motor 324.In addition, bicycle drive unit 312 comprises output link attachment 326, output link 328, the first crank arm 330, the second crank arm 332 and pair of bearings unit 334 and 335.The first axis 320, the second axis 321, crank shaft 322, output link attachment 326, output link 328, the first crank arm 330, the second crank arm 332 and bearing unit 334 and 335 are substantially the same with the first axis 20, the second axis 21, crank shaft 22, output link attachment 26, output link 28, the first crank arm 30, the second crank arm 32 and bearing unit 34 and 35 according to the first embodiment respectively.Therefore, will omit for simplicity the detailed description of these parts.In the illustrated embodiment, the first axis 320 is connected to the first axial end of intermediate axle housing 314, and the second axis 321 is connected to second axial end relative with the first axial end of intermediate axle housing 314.The second axis 321 is identical with the first axis 320, arranging symmetrically about intermediate axle housing 314 mirror images with respect to the first axis 320 except the second axis 321.In the illustrated embodiment, the first axis 320 can support crank shaft 322 rotatably via bearing unit 334, and the second axis 321 can support crank shaft 322 rotatably via the bearing unit 335 in bearing unit 334 axially-spaced locations.In the illustrated embodiment, the first crank arm 330 can be connected to the first end 344 of crank shaft 322 with dismantling, and the second crank arm 332 can be connected to the second end 346 of crank shaft 322 with dismantling.

As shown in figure 13, motor 324 is basically identical with the motor 24 according to the first embodiment, except as the feature illustrated below.Utilize bicycle drive unit 312, the rotation axis of the rotation axis of crank shaft 322 and motor 324 arranges coaxially with each other.By this, consistent rotation axis is called the rotation axis X1 of bicycle drive unit 312 hereinafter.In the illustrated embodiment, crank shaft 322 can be supported about rotation axis X1 rotatably by the first axis 320.As shown in figure 13, in the illustrated embodiment, motor 324 has the central through hole 348 extended through for crank shaft 322.Central through hole 348 is arranged on the rotating center section of motor 324.It is coaxial with the rotation axis of crank shaft 322 that motor 324 is set to its rotation axis.As shown in figure 13, motor 324 comprises for example the first rotor of the first housing 350, the second housing 352, rotor 354() and stator 356(the first stator for example).Basically, crank shaft 322 and the first housing 350 are formed integrally as the single type integrated member.Therefore, the first housing 350 is not connected to crank shaft 322 revolvably.The second housing 352 is not connected to intermediate axle housing 314 revolvably.Rotor 354 has a plurality of the first magnet 358a and a plurality of the second magnet 358b be configured on the first housing 350.Stator 356 is not connected to the first axis 320 revolvably.Stator 356 has a plurality of stator tooths 362 that are fixedly attached to the first axis 320 and is wrapped in a plurality of winding wires 364 on stator tooth 362.In the illustrated embodiment, motor 324 is three-phase dc motor.Certainly, those skilled in the art will know that from the utility model motor 324 can or have the brush Direct Current Motor for the brushless of other types.

As shown in figure 14, the first housing 350 is substantially the same with the first housing 50 according to the first embodiment, except the first housing 350 also has the second sidewall 380, it is connected to the perimembranous 366 of the first housing 350, so that the first side wall 378 of the second sidewall 380 and the first housing 350 is axially faced.The second sidewall 380 is essentially the ring discoid plate.The second sidewall 380 is fixedly coupled to from the axial end of the axially extended perimembranous 366 of the first side wall 378.In the illustrated embodiment, the second sidewall 380 utilizes adhesives to be fixedly coupled to the perimembranous 366 of the first housing 350.Certainly, those skilled in the art will know that from the utility model the second sidewall 380 can be connected to the first housing 350 in a different manner, such as being pressed into cooperation, be threaded, welding etc.In the illustrated embodiment, the second sidewall 380 has the external diameter of the internal diameter of the perimembranous 366 that is substantially equal to or is slightly less than the first housing 350.

In the illustrated embodiment, as shown in Figure 13 and Figure 14, the first side wall 378 has the first axially facing surface 382, and the second sidewall 380 has the second axially facing surface 384.In other words, the first housing 350 has the 382 and second axially facing surface 384, the first axially facing surface.The first the 382 and second axially facing surface 384, axially facing surface axially faces with each other about the rotation axis X1 of crank shaft 322.In the illustrated embodiment, as shown in Figure 13 and Figure 14, the first magnet 358a is configured on the first axially facing surface 382 of the first housing 350, so that the first magnet 358a and stator 356 axially face with each other about the rotation axis X1 of crank shaft 322.In addition, the second magnet 358b is configured on the second axially facing surface 384 of the first housing 350, so that the second magnet 358b and stator 356 axially face with each other about the rotation axis X1 of crank shaft 322.In the illustrated embodiment, the 382 and second axially facing surface 384, the first axially facing surface can limit the axially facing surface of perimembranous 366.Therefore, rotor 354(is the first rotor for example) the first magnet 358a and the axially facing surface of the second magnet 358b perimembranous 366 of being configured in the first housing 350 on so that rotor 354 and stator 356 axially face with each other about the rotation axis X1 of crank shaft 322.Especially, as shown in figure 13, stator 356 axially is configured between the first magnet 358a and the second magnet 358b.The first magnet 358a is arranged on the first axially facing surface 382 with respect to rotation axis X1 circumferentially along perimembranous 366, and the second magnet 358b is arranged on the second axially facing surface 384 with respect to rotation axis X1 circumferentially along perimembranous 366.In the illustrated embodiment, rotor 354 has 12 the first magnet 358a and 12 the second magnet 358b.Yet certainly,, the quantity of the quantity of the first magnet 358a and the second magnet 358b can be greater or less than 12.In the illustrated embodiment, the second sidewall 380 forms independent parts independently.Yet the second sidewall 380 can be formed integrally as the single type integrated member with the first housing 350.

As shown in figure 14, the second housing 352 is substantially the same with the second housing 52 according to the first embodiment, except the size of the second housing 352.Therefore, will omit detailed description for simplicity.In the illustrated embodiment, the second housing 352 is sized to, and the second housing 352 radially inwardly arranges with respect to the second sidewall 380 of the first housing 350.Especially, the second housing 352 has the external diameter of the internal diameter of the central through hole that is slightly less than the second sidewall 380.Therefore, as shown in figure 14, the second housing 352 can be set to the second housing 352 and the second sidewall 380 radially faces with each other with respect to the second sidewall 380.Stator 356 is identical with the stator 56 according to the first embodiment.To omit detailed description for simplicity.

Utilize bicycle drive unit 312, the power that scrunches acted on the first crank arm 330 and the second crank arm 332 is delivered to output link 328 via crank shaft 322 and output link attachment 326.In addition, the rotation of motor 324 output is delivered to output link 328 via the first housing 350, crank shaft 322 and output link attachment 326 from motor 324.In the illustrated embodiment, crank shaft 322 or output link attachment 326 will scrunch power and combine as auxiliary power with the rotation output of motor 324, to help rider's riding bicycle 310.Especially, the rotation of output link 328 output is delivered to via chain the rear sprocket wheel that the rear wheel boss shaft around trailing wheel can configure rotatably.Alternatively or additionally, bicycle drive unit 312 also can comprise the gear mechanism combined with the rotation output of motor 324 for scrunching power.

In the illustrated embodiment, alternatively or additionally, motor 324 can comprise radially the second sidewall 380 in the first housing 350 and the sealing member between the second housing 352, to limit the seal cavity of motor 324.Sealing member can be dubbing such as silicone grease, colyliform or annular seal such as O shape ring etc.In this case, rotor 354 and stator 356 are arranged in seal cavity with the waterproof waterproof.

In the illustrated embodiment, as shown in Figure 13 and Figure 14, the first housing 350 is formed integrally as the single type integrated member with crank shaft 322.Yet utilizing bicycle drive unit 312, the first housings 350 can be the parts that separate with crank shaft 322.Especially, the first housing 350 can be not revolvably and can be connected to crank shaft 322 with dismantling, particularly, as shown in Figure 15 and Figure 16, crank shaft 322 can be connected to the central part 350b of the first housing 350 with dismantling.Crank shaft 322 has for example outer sawtooth of sawtooth grooves 322a().The first housing 350 have sawtooth 350a(on the inside face 350c of the central part 350b that is formed on the first housing 350 for example in sawtooth).The sawtooth 350a of the first housing 350 is not connected to the sawtooth grooves 322a of crank shaft 322 revolvably.The sawtooth 350a of the first housing 350 can be connected to crank shaft 322 with dismantling.Especially, crank shaft 322 extends through the central part 350b of the first housing 350, so that the sawtooth 350a of the sawtooth grooves 322a of crank shaft 322 and the first housing 350 engagement.Therefore, the first housing 350 is not connected to crank shaft 322 revolvably, so that the rotation of crank shaft 322 can be directly delivered to the first housing 350.Crank shaft 322 extends through the first housing 350 so that first end 344 axially reaches the first housing 350 outsides.The second end 346 of crank shaft 322 axially reaches intermediate axle housing 314 and output link attachment 326 outsides.In the illustrated embodiment, crank shaft 322 utilizes connecting and being fixedly coupled to the first housing 350 between sawtooth grooves 322a and sawtooth 350a.Certainly, those skilled in the art will know that from the utility model crank shaft 322 can not be connected to the first housing 350 in a different manner revolvably, such as being pressed into cooperation, be threaded, welding etc.

When understanding scope of the present utility model, when using in this article, term " coupled " or " connection " comprise an element and directly are fixed to the structure on another element by described element directly being attached on another element; Element is by being attached to described element on (a plurality of) intermediate member and intermediate member then is attached on another element and indirectly is fixed to structure on another element and an element and another element i.e. structure that element is in fact the part of another element that forms as one.This definition also is applicable to have the word of the similar meaning, for example, and " being bonded ", " being connected ", " being attached ", " being mounted ", " by bonding ", " being fixed " and derivative thereof.

When understanding scope of the present utility model, when using in this article, term " comprises " and derivative is intended for open-ended term, it clearly states the existence of described feature, element, parts, group, integral body and/or step, but does not get rid of the existence that other do not state feature, element, parts, group, integral body and/or step.Above-mentioned explanation also is applicable to have the word of the similar meaning, and for example term " comprises ", " having " and derivative thereof.

Although also will understand, may use in this article term " first " and " second " to describe each parts, these parts should not be subject to these term restrictions.These terms just are used for parts and another component region are separated.Therefore, for example, in the situation that do not break away from instruction of the present utility model, first component can be known as second component and vice versa as discussed above.And term " part ", " part ", " section ", " member " or " element ", when as odd number, can have the dual meaning of single part or a plurality of parts.Finally, when using in this article, the degree term, for example " basically ", " approximately ", " being similar to " mean the reasonable bias of being modified term, make net result significantly do not changed.

Although only selected selected embodiment to carry out illustration the utility model, but those skilled in the art will be clear from the utility model, in the situation that do not break away from the utility model scope limited as claims, can make various changes and change in this article.For example, the size of each parts, shape, position or towards changing as needed and/or desired, as long as they change its expectation function indistinctively.Be depicted as the parts that directly connect mutually or contact and can there is the intermediate structure be arranged between them, unless otherwise expressly noted.The function of an element can be carried out by two, and vice versa, unless otherwise expressly noted.The 26S Proteasome Structure and Function of an embodiment can adopt in another embodiment.Do not need all advantages are all represented in a particular embodiment simultaneously.For each compared with prior art unique feature, individually or with other Feature Combinations, also should be considered to the independent description of applicant to further utility model, comprise by structure and/or the concept of function of such (a plurality of) feature instantiation.Therefore, only be provided for illustration according to the aforementioned description of embodiment of the present utility model rather than, in order to limit the utility model, the utility model is limited by claims and equivalent thereof.

Claims

1. a bicycle drive unit comprises:

The first axis, be configured to be connected to the first axial end of the intermediate axle housing of bicycle;

Crank shaft, can be supported rotatably by described the first axis, and described crank shaft has first end and the second end;

The first motor, comprise the first housing that is not connected to revolvably described crank shaft, the second housing that is not connected to revolvably described intermediate axle housing, the first stator that has the first rotor of the first magnet and be not connected to revolvably described the first axis, described the first rotor functionally is connected to the first end of described crank shaft and is configured on described the first housing; And

Output link, functionally be connected to the second end of described crank shaft, so that described the first motor will rotate output, via described crank shaft, is delivered to described output link.

2. bicycle drive unit according to claim 1, wherein

Described the second housing is not connected to described the first axis revolvably.

3. bicycle drive unit according to claim 1, wherein

Described the first stator is bearing on described the first axis.

4. bicycle drive unit according to claim 1, wherein

Described the first magnet configuration is on the perimembranous of described the first housing.

5. bicycle drive unit according to claim 4, wherein

Described the first magnet configuration is on the inner peripheral surface of the perimembranous of described the first housing, so that described the first magnet and described the first stator radially face with each other about the rotation axis of described crank shaft.

6. bicycle drive unit according to claim 5, wherein

Described the first magnet is fixedly attached to the inner peripheral surface of the perimembranous of described the first housing.

7. bicycle drive unit according to claim 1, wherein

Described the first axis has external thread part, and this external thread part is configured to the internal thread part of thread connection to described intermediate axle housing.

8. bicycle drive unit according to claim 1, wherein

Described crank shaft can be connected to the central part of described the first housing with dismantling.

9. bicycle drive unit according to claim 1, wherein

Described crank shaft has outer sawtooth;

Described the first housing has the interior sawtooth on the inside face that is formed on described the first housing; And

The interior sawtooth of described the first housing is not connected to the outer sawtooth of described crank shaft revolvably.

10. bicycle drive unit according to claim 1, also comprise

Be not connected to revolvably the first crank arm of the first end of described crank shaft.

11. bicycle drive unit according to claim 1, wherein

Described the first motor also is included in sealing member between described the first housing and described the second housing to limit seal cavity.

12. bicycle drive unit according to claim 1, also comprise

The second axis, be configured to be connected to the second axial end of described intermediate axle housing, and the second axial end of wherein said intermediate axle housing is relative with the first axial end of described intermediate axle housing, and wherein said crank shaft can be supported rotatably by described the second axis.

13. bicycle drive unit according to claim 12, also comprise

Be not connected to revolvably the second crank arm of the second end of described crank shaft.

14. bicycle drive unit according to claim 13, wherein

Described the second crank arm comprises the output link attachment, and

Described output link is chain link, and it utilizes fastener can be connected to described output link attachment with dismantling.

15. bicycle drive unit according to claim 12, also comprise

The second motor, the second rotor on the perimembranous that comprise the 3rd housing, the 4th housing that is fixedly coupled to described the second axis that are not connected to revolvably described crank shaft, is configured in described the 3rd housing and be bearing in the second stator on described the second axis.

16. bicycle drive unit according to claim 15, wherein

Described output link can be connected to described the 3rd housing with dismantling, so that described the second motor will rotate output, is delivered to described output link.

17. bicycle drive unit according to claim 1, wherein

Described the first housing has the magnet containing component, and it is contained in described the first magnet in the inner space of described magnet containing component.

18. bicycle drive unit according to claim 1, wherein

Described the second housing has the stator containing component, and it is contained in described the first stator in the inner space of described stator containing component.

19. bicycle drive unit according to claim 17, wherein

20. bicycle drive unit according to claim 19, wherein

The magnet containing component of described the first housing and the stator containing component of described the second housing are made by non-magnetic material.

21. bicycle drive unit according to claim 1, wherein

Described the first stator has the stator tooth that is fixedly attached to described the first axis and is wrapped in the winding wire on described stator tooth.

22. bicycle drive unit according to claim 1, wherein

Described the first axis comprises that bearing unit is can support rotatably described crank shaft.

23. bicycle drive unit according to claim 1, wherein

Described the first motor is three-phase dc motor.

24. bicycle drive unit according to claim 1, wherein

Described the first rotor is configured on the axially facing surface of perimembranous of described the first housing, so that described the first rotor and described the first stator axially face with each other about the rotation axis of described crank shaft.