CN202609020U

CN202609020U - Centrally-mounted power output mechanism of electricity-aided bicycle

Info

Publication number: CN202609020U
Application number: CN2012200836984U
Authority: CN
Inventors: 许源芳
Original assignee: JD Components Co Ltd
Current assignee: JD Components Co Ltd
Priority date: 2012-03-08
Filing date: 2012-03-08
Publication date: 2012-12-19
Anticipated expiration: 2022-03-08

Abstract

The utility model discloses a centrally-mounted power output mechanism of an electricity-aided bicycle. The centrally-mounted power output mechanism mainly comprises a shell, a crankshaft penetrating through the shell, a transmission sleeve member connected with the crankshaft, an inner gear ring arranged inside the shell, an assisting power output unit arranged inside the shell, a transmission unit sleeved on the crankshaft and a deceleration unit sleeved on the crankshaft, wherein when outputting of the assisting power is started, a rotor of the assisting power output unit can drive the transmission unit to rotate, and then the transmission unit drives a planetary gear of the deceleration unit to rotate eccentrically around the inner gear ring, so that a planetary bracket of the deceleration unit which is driven by the planetary gear drives the transmission sleeve member to rotate in a single way through a single-way device so as to realize the purpose of outputting power.

Description

The mid-power take-off mechanism of electric booster bicycle

Technical field

The utility model is relevant with electric booster bicycle, particularly relevant for a kind of mid-power take-off mechanism of electric booster bicycle.

Background technology

Japanese kokai publication hei 11-255177 patent case is exposed a kind of " Electrical Bicycle "; It mainly is that a driving device is installed between motor and rear chain disk; Driving device has a planet gear reduction unit and is connected with the force-output shaft of motor; Can the power that motor is exported be passed to rear chain disk again after slowing down, rotate in order to drive rear chain disk.

Structure with regard to the planet-gear speed reducer of this patent case; Mainly have a delegation's prong frame and a planet gear; Planet stent wherein has a plurality of projections, and planetary wheel then has a plurality of perforation and supplies said projection to wear, when planet stent receives the driving of motor and produces eccentric rotary; The said projection of planet stent will be distinguished the hole wall of the planetary said perforation of ejection, lets the planet gear reach the purpose of takeoff output thereupon rotating.

Yet in previous designs; In the process of running, can constantly produce abrasion between the projection of planet stent and the planetary perforation; In the course of time just can cause running accuracy variation between the two, and then influence integrally-built normal operation, also can cause the shortening in service life simultaneously.

The utility model content

The main purpose of the utility model is to provide a kind of mid-power take-off mechanism of electric booster bicycle, the good and long service life of its running accuracy.

For reaching above-mentioned purpose, the mid-power take-off mechanism of the utility model includes a housing, a crank group, an internal gear, a power-assisted output unit, a gear unit, and a deceleration unit.

This crank group has a crank shaft and a large fluted disc, and this crank shaft is arranged in this housing rotationally, and this large fluted disc connects this crank shaft, can receive the drive of this crank shaft and rotates synchronously;

This internal gear is located in this housing;

This power-assisted output unit has a rotor, and this rotor can be sheathed on this crank shaft rotationally;

This gear unit is sheathed on this crank shaft and has one first Transmission and one second Transmission, and this first Transmission connects the rotor of this power-assisted output unit, and this second Transmission connects this first Transmission and can rotate synchronously with this first Transmission; And

This deceleration unit is located in this housing and is sheathed on this crank shaft; And have at least one planetary wheel and a delegation's prong frame; This this internal gear of planetary wheel interlock and form eccentric the connection with second Transmission of this gear unit, this planet stent connects this planetary wheel and passes through an isolator and is connected with this large fluted disc.

When the rotor of this power-assisted output unit begins to rotate; First Transmission of this gear unit can receive the drive of this rotor and rotate; Then this planetary wheel can receive this gear unit second Transmission drive and rotate around this internal gear; Then this planet stent can receive this planetary driving and drives this transmission external member and carry out unidirectional rotation, to reach the effect of power-assisted output.

Wherein, this large fluted disc has a transmission external member, and an end of this transmission external member stretches in this housing and through an isolator and is connected with this crank shaft.

Wherein, second Transmission of this gear unit has a cam part, and this planetary wheel is socketed on the cam part of this second Transmission.

Wherein, this deceleration unit also has at least two attaching partss, and respectively the two ends of this attaching parts connect this planetary wheel and this planet stent respectively.

Wherein, this planetary number is two, has the phase difference of 180 degree between this two planetary wheel.

Wherein, second Transmission of this gear unit has two cam part, and this two planetary wheel is socketed on this two cam part of this second Transmission respectively.

Wherein, this deceleration unit also has at least two attaching partss, and respectively this attaching parts connects this two planetary wheel and this planet stent.

The beneficial effect of the utility model: from the above; The mid-power take-off mechanism of the utility model utilizes the off-centre between second Transmission of this planetary wheel and this gear unit to be connected the purpose that lets this planet stent can reach outputting power; Can guarantee that integral structure has good running accuracy, and can prolong integrally-built service life.

Description of drawings

Fig. 1 is the partial perspective view of the utility model one preferred embodiment.

Fig. 2 is the sectional perspective exploded drawings of the utility model one preferred embodiment.

Fig. 3 is the planar view of the utility model one preferred embodiment.

Fig. 4 is the local longitudinal sectional view of the utility model one preferred embodiment.

Fig. 5 and Fig. 6 are the partial lateral cutaway view of the utility model one preferred embodiment, mainly show the state that planetary wheel rotates around internal gear.

The main element nomenclature

10 mid-power take-off mechanism 20 housings

22 side covers, 30 crank groups

32 crank shafts, 34 cranks

36 large fluted discs, 362 transmission external members

38 isolators, 40 internal gears

50 power-assisted output units, 52 stators

54 rotors, 60 gear units

62 first Transmissions, 64 second Transmissions

642 cam part, 70 deceleration unit

72 planetary wheels, 74 planet stents

76 attaching partss, 78 isolators

80 bearings

The specific embodiment

Now cooperate the graphic following preferred embodiment of enumerating, be elaborated in order to structure and effect to the utility model.

Please consult Fig. 1 to Fig. 3 earlier, be the mid-power take-off mechanism 10 of the utility model one preferred embodiment, include a housing 20, a crank group 30, an internal gear 40, a power-assisted output unit 50, a gear unit 60, and a deceleration unit 70.

Housing 20 is to be docked each other by two side covers 22 to form.

Please cooperate and consult Fig. 3 and Fig. 4, crank group 30 has a crank shaft 32, two cranks 34, and a large fluted disc 36.Crank shaft 32 is arranged in housing 20 and is connected with crank 34 with its two ends; Large fluted disc 36 has a transmission external member 362, and transmission external member 362 stretches in the housing 20 and through an isolator 38 and is connected with crank shaft 32.

Internal gear 40 is fixed in the internal face of housing 20 with its outer ring surface.

Power-assisted output unit 50 has one and is fixed in the rotor 54 that housing 20 interior stators 52 and are sheathed on crank shaft 32.When stator 52 is passed to electric current, can drive rotor 54 relative stator 52 and rotate.

Gear unit 60 has one first Transmission 62 and one second Transmission 64.First Transmission 62 is sheathed on crank shaft 32 and connects the rotor 54 of power-assisted output unit 50, can receive the drive of rotor 54 and rotates synchronously; Second Transmission 64 is connected in an end of first Transmission 62 and can rotates synchronously with first Transmission 62, and radially outwards stretches out two relative cam part 642 from its outer peripheral face, like Fig. 4 and shown in Figure 5.

Deceleration unit 70 has two planetary wheels 72, delegation's prong frame 74, and a plurality of attaching parts 76.This two planetary wheels, 72 interlock internal gears 40 and be socketed on the cam part 642 of second Transmission 64 respectively through a bearing 80 make the phase difference that can have 180 degree between this two planetary wheel 72 because of the relative position relation between this two cam part 642; Planet stent 74 is sheathed on crank shaft 32 and is connected with the transmission external member 362 of large fluted disc 36 through an isolator 78; Each attaching parts 76 is arranged in this two planetary wheel 72, and connects a wherein planet gear 72 with the one of which end, and the other end connects planet stent 74.What need supplemental instruction in addition is; The number of planetary wheel 72 is as long as at least one can reach due transmission agency; In this purpose that is provided with two is in order to produce good kinetic balance effect; If under the state that has only a planetary wheel 72, as long as second Transmission 64 also provides a cam part 642 to let the planet gear 72 can socket.

Can know via said structure; When the rider begins to drive; Crank shaft 32 can receive the drive of this two crank 34 and begin to rotate; And in rotating process, see through the transmission external member 362 that isolator 78 drives large fluted disc 36 and carry out unidirectional rotation, in order to drive the purpose that large fluted disc 36 reaches takeoff output.

In the time will exporting power-assisted; Earlier 52 energisings are controlled rotor 54 and are begun to rotate to stator; First Transmission 62 and second Transmission 64 that in rotor 54 rotating process, can drive gear unit 60 synchronously rotate synchronously; Then this two planetary wheel 72 can receive simultaneously second Transmission 64 cam part 642 ejection and rotate around internal gear 40, to shown in Figure 6, then this two planetary wheel 72 can see through each attaching parts 76 again and drive planet stent 74 and rotate in rotating process like Fig. 4; Planet stent 74 meetings of this moment are carried out unidirectional rotation through the transmission external member 362 that isolator 78 drives large fluted disc 36, in order to drive the effect that large fluted disc 36 reaches power-assisted output.

From the above; The mid-power take-off mechanism 10 of the utility model utilizes the off-centre between second Transmission 64 of planetary wheel 72 and gear unit 60 to be connected the purpose that the prong frame 74 that gives way can reach outputting power; Can guarantee that integral structure has good running accuracy, and the abrasion that can reduce between each member reach the purpose that increases the service life.

Claims

1. the mid-power take-off mechanism of an electric booster bicycle is characterized in that, includes:

One housing;

One crank group has a crank shaft and a large fluted disc, and this crank shaft can be arranged in this housing rotationally, and this large fluted disc connects this crank shaft, can receive the drive of this crank shaft and rotates synchronously;

One internal gear is located in this housing;

One power-assisted output unit has a rotor, and this rotor can be sheathed on this crank shaft rotationally;

One gear unit; Be sheathed on this crank shaft and have one first Transmission and one second Transmission; This first Transmission connects the rotor of this power-assisted output unit, can receive the drive of this rotor and rotates, and this second Transmission connects this first Transmission and can rotate synchronously with this first Transmission; And

One deceleration unit; Be located in this housing and be sheathed on this crank shaft; And have at least one planetary wheel and a delegation's prong frame; This this internal gear of planetary wheel interlock and form eccentric the connection with second Transmission of this gear unit; Make this planetary wheel can receive the drive of this second Transmission and rotate that this planet stent connects this planetary wheel and is connected with this large fluted disc through an isolator, make this planet stent can receive this planetary driving and drive this large fluted disc and make unidirectional rotation around this internal gear.

2. the mid-power take-off mechanism of electric booster bicycle as claimed in claim 1; It is characterized in that; This large fluted disc has a transmission external member; One end of this transmission external member stretches in this housing and through an isolator and is connected with this crank shaft, makes this large fluted disc can receive the drive of this crank shaft and makes unidirectional rotation.

3. the mid-power take-off mechanism of electric booster bicycle as claimed in claim 1 is characterized in that, second Transmission of this gear unit has a cam part, and this planetary wheel is socketed on the cam part of this second Transmission.

4. the mid-power take-off mechanism of electric booster bicycle as claimed in claim 1 is characterized in that, this deceleration unit also has at least two attaching partss, and respectively the two ends of this attaching parts connect this planetary wheel and this planet stent respectively.

5. the mid-power take-off mechanism of electric booster bicycle as claimed in claim 1 is characterized in that, this planetary number is two, has the phase difference of 180 degree between this two planetary wheel.

6. the mid-power take-off mechanism of electric booster bicycle as claimed in claim 5 is characterized in that, second Transmission of this gear unit has two cam part, and this two planetary wheel is socketed on this two cam part of this second Transmission respectively.

7. the mid-power take-off mechanism of electric booster bicycle as claimed in claim 5 is characterized in that, this deceleration unit also has at least two attaching partss, and respectively this attaching parts connects this two planetary wheel and this planet stent.