CN212685850U - Power assisting device of bicycle - Google Patents

Abstract

The application provides booster unit of bicycle includes: the rechargeable battery, the electronic controller, the direct current motor and the transmission unit are assembled in the shell; the electronic controller is electrically connected with the rechargeable battery and the direct current motor, the electronic controller is used for controlling the operation of the direct current motor, the electronic controller can be connected with an external power supply to charge the rechargeable battery and control the discharge of the rechargeable battery and provide a protection function, the transmission unit basically comprises a speed reducer consisting of a first planetary gear mechanism and a second planetary gear mechanism and a bevel gear set, the rotary power output by the direct current motor is reduced by the speed reducer and then drives the bevel gear set, and then drives a five-way spindle of the bicycle through the bevel gear set, and the detector of the electronic controller is configured to detect the motion state of the bicycle and control the operation of the direct current motor when necessary; this application booster unit passes through the shell assembly at the low tube of bicycle frame, and the structure is light and handy, can provide the helping hand that needs during the bicycle traveles.

Description

Power assisting device of bicycle

Technical Field

The present application relates to a power device for a bicycle, and more particularly to a power assisting device for a bicycle.

Background

Because of pollution problems caused by high industrialization and other many unfavorable factors, the method has great harm and threat to the global environment and ecology; in order to reduce the environmental pollution, governments in various countries have no incentive to make the public use of mass transportation means or use low-pollution transportation means, and in response to the concepts of environmental protection and health, bicycles become popular transportation means for transportation and sports fitness.

Although the bicycle without any fuel or electric energy meets the requirements of environmental protection and energy saving, most of the common people living in the modern city are still difficult to accept by the masses with poor physical performance for a long time or for long-distance riding; because the demand of the traffic transportation tool for leisure, green-stepping tourism, environmental protection and energy saving is sought by people, the electric bicycle is free from pollution, labor-saving and convenient, and the electric auxiliary bicycle is taken off from the front.

The electric-assisted bicycle is popular in the global market in hot days, and is really very popular in some countries in Europe and America, even at least one electric-assisted bicycle in every family. For modern people with slightly poor physical ability, the most attractive place for the electric assisted bicycle is that the booster or booster of the electric assisted bicycle can dynamically follow the power of the bicycle rider and automatically detect the action state of the bicycle to provide auxiliary power appropriately, so as to help the bicycle rider climb higher and ride farther, fully enjoy the fun of riding and enjoying with friends, and further make people who are not loved to ride the bicycle because of poor physical ability to ride the bicycle easier. Therefore, it is one of the objectives of the related art to provide a bicycle booster or power assisting device which is more advanced and superior, under the principle of not changing or minimally changing the existing bicycle structure as much as possible.

SUMMERY OF THE UTILITY MODEL

Based on the technical problem of solve foretell, the main aim at of this application provides a booster unit of bicycle.

An example configuration of a booster for a bicycle of the present application includes: the rechargeable battery, the electronic controller, the direct current motor and the transmission unit are assembled in the shell; the shell is of a hollow tubular structure, the shell is provided with a control panel, the control panel at least comprises a starting switch and a charging socket, the starting switch and the charging socket are electrically connected with an electronic controller, the starting switch is used for starting or closing the power assisting device, and the electronic controller can be electrically connected with an external power supply through the charging socket so as to charge the rechargeable battery; the electronic controller is electrically connected with the rechargeable battery and the direct current motor, the electronic controller is provided with a detector for detecting the motion state of the bicycle and controlling the operation of the direct current motor according to the motion state obtained by detection, and the electronic controller can be connected with an external power supply to charge the rechargeable battery and control the discharge of the rechargeable battery and provide protection functions; the transmission unit comprises a speed reducer consisting of a first planetary gear mechanism and a second planetary gear mechanism, and a bevel gear set, wherein the bevel gear set comprises a first bevel gear and a second bevel gear which are meshed with each other, the second bevel gear is assembled on a five-way main shaft of the bicycle, a direct current motor is connected with the input end of the speed reducer, the output end of the speed reducer is connected with the first bevel gear, the rotary power output by the direct current motor drives the first bevel gear after being reduced by the speed reducer, and the first bevel gear drives the second bevel gear and the five-way main shaft to rotate so as to provide the required assistance during the running of the bicycle.

Wherein the rechargeable battery is a lithium ion battery pack composed of a plurality of lithium ion batteries.

The electronic controller comprises a battery control and protection circuit and a direct current motor control circuit, the battery control and protection circuit contains a lithium ion battery control chip and a protection chip and is used for managing and controlling a lithium ion battery pack, and the protection function comprises any one or combination of overcharge protection, overdischarge protection and overcurrent protection.

The DC motor control circuit controls the operation of the DC motor according to the detected motion state, and the operation of the DC motor comprises the following steps: starting, stopping and torque output of the direct current motor.

Wherein the first planetary gear mechanism comprises: a first sun gear, a first internal gear, a first planetary carrier, and a first planetary gear set rotatably mounted to the first planetary carrier, the first sun gear being fixed to a rotation center of the first planetary carrier, the first planetary gear set serving as an input terminal of the reduction gear; the second planetary gear mechanism includes: a second sun gear, a second planet carrier, and a second planetary gear set rotatably mounted on the second planet carrier, the second sun gear being fixed to a rotation center of the second planet carrier, the second sun gear serving as an output end of the reduction gear; wherein the first planetary gear mechanism and the second planetary gear mechanism share the first internal gear, the first planetary gear set is between the first sun gear and the first internal gear, and the first planetary gear set is meshed with the first sun gear and the first internal gear; the second planetary gear set is arranged between the second sun gear and the first internal gear and meshed with the second sun gear and the first internal gear; the first internal gear is connected with the direct current motor through a motor flange interface and fixedly assembled in the shell through a front cover bracket at the front end of the shell; the output shaft of the DC motor is provided with a driving gear, and the driving gear is meshed with the first planetary gear set to drive the first planetary gear mechanism to rotate.

The transmission unit of the power assisting device of the bicycle further comprises a one-way bearing, the second bevel gear is assembled on the five-way main shaft through the one-way bearing, and the second bevel gear cannot be driven to rotate when the five-way main shaft rotates backwards.

As a preferable structure of the power assist device for a bicycle of the present application, the housing has an openable and closable outer lid, which is fitted to the housing with a hinge, and the rechargeable battery can be replaced or maintenance can be performed by opening the outer lid.

The power assisting device of the bicycle has the beneficial effects that the power assisting device is assembled at the lower pipe of the bicycle frame through the shell, the structure is light, and the needed power assisting can be provided during the running of the bicycle.

Other features and embodiments of the present application will be described in detail below with reference to the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an external view of the configuration of an embodiment of a power assist device of a bicycle of the present application, showing the power assist device mounted to a down tube of the bicycle frame;

FIG. 2 is an external view of the bicycle assist device of the present application;

FIG. 3 is an exploded view of an embodiment of the bicycle assist device of the present application;

FIG. 4 is a schematic view of a portion of a bicycle power assist device of the present application;

FIG. 5 is a cross-sectional view of the construction of FIG. 2 at position A-A;

FIG. 6 is a partial configuration view of FIG. 5 at position B;

FIG. 7 is a schematic view of the operation of the cover of the housing of the bicycle assist device of the present application.

Description of the symbols

10 casing 11 control panel

111 starting switch 112 charging socket

113 display 12 cover

121 hinge 20 rechargeable battery

30 electronic controller 40 DC motor

41 driving gear 50 transmission unit

51 reduction gear 52 first planetary gear mechanism

521 first sun gear 522 first internal gear

523 first planetary Carrier 524 first planetary gearset

53 second planetary gear 531 second sun gear

532 second planetary carrier 533 second planetary gear set

54 bevel gear set 541 first bevel gear

542 second bevel gear 55 motor flange interface

56 front cover support 57 one-way bearing

90 frame 91 lower tube

92 five-way main shaft

Detailed Description

The positional relationship described in the following embodiments includes: the top, bottom, left and right, unless otherwise indicated, are based on the orientation of the elements in the drawings.

Referring first to fig. 1 to 3, an appearance view and an exploded view of an embodiment of a bicycle power assisting device according to the present invention are shown.

An example configuration of a booster for a bicycle of the present application includes: a housing 10, and a rechargeable battery 20, an electronic controller 30, a dc motor 40, and a transmission unit 50 assembled in the housing 10. Wherein the preferred embodiment of the rechargeable battery 20 is a lithium ion battery pack consisting of a plurality of lithium ion batteries. The output shaft of the dc motor 40 is fitted with a drive gear 41.

The housing 10 is a hollow tubular structure for accommodating the rechargeable battery 20, the electronic controller 30, the dc motor 40 and the transmission unit 50, the housing 10 is mounted On a down tube 91 of the frame 90 of the bicycle, the housing 10 is configured with a control panel 11 (see fig. 7), the control panel 11 at least has a power On/Off switch 111 and a charging socket 112, the power On/Off switch 111 and the charging socket 112 are electrically connected to the electronic controller 30, the user can operate the power On/Off switch 111 to turn On or Off the power assisting device, and the electronic controller 30 can be electrically connected to an external power source through the charging socket 112 to charge the rechargeable battery 20. The preferred embodiment of the control panel 11 may further include a display 113 (e.g., a sequential LED light), the display 113 being electrically connected to the electronic controller 30 for displaying the charge of the rechargeable battery 20.

The electronic controller 30 is electrically connected to the rechargeable battery 20 and the dc motor 40, and the electronic controller 30 at least includes a battery control and protection circuit and a dc motor control circuit, wherein the battery control and protection circuit has functions of charging, discharging and protecting the rechargeable battery 20; the battery control and protection circuit can basically select a lithium ion battery control chip and a protection chip which are contained in the market and used for managing and controlling the lithium ion battery control and protection circuit of the lithium ion battery pack, so that the functions of charging, discharging and protecting the lithium ion battery pack can be realized, and the protection function comprises but is not limited to any one of or the combination of overcharge protection, overdischarge protection and overcurrent protection; the electronic controller 30 has a detector (e.g., a gyroscope or a gravity sensor) for detecting the motion state of the bicycle and controlling the operation of the dc motor 40 as necessary for providing the required assist force during the running of the bicycle, the operation of the dc motor 40 includes: starting, stopping and torque output of the direct current motor.

Referring to fig. 3, the transmission unit 50 basically includes: speed reducer 51, bevel gear set 54, and motor flange interface 55; wherein the speed reducer 51 comprises a first planetary gear mechanism 52 and a second planetary gear mechanism 53, the bevel gear set 54 comprises a first bevel gear 541 and a second bevel gear 542 which are meshed with each other, the second bevel gear 542 is mounted on a five-way main shaft 92 (see fig. 4) of the bicycle, the dc motor 40 is connected with the input end of the speed reducer 51, the output end of the speed reducer 51 is connected with the first bevel gear 541, the rotational power output by the dc motor 40 is reduced by the speed reducer 51 and then drives the first bevel gear 541, and further drives the second bevel gear 542 and the five-way main shaft 92 to rotate through the first bevel gear 541, so as to provide the required assisting power during the running of the bicycle.

Referring to fig. 5 and 6, one example configuration of the first planetary gear mechanism 52 includes: a first sun gear 521, a first internal gear 522, a first carrier 523, and a first planetary gear set 524 rotatably mounted to the first carrier 523, the first sun gear 521 being fixed to a rotation center of the first carrier 523, the first planetary gear set 524 serving as an input terminal of the speed reducer 51; the second planetary gear mechanism 53 includes: a second sun gear 531, a second planet carrier 532, and a second planetary gear set 533 rotatably fitted to the second planet carrier 532, the second sun gear 531 being fixed to the rotation center of the second planet carrier 532, the second sun gear 531 serving as the output of the reduction gear 51; wherein the first planetary gear mechanism 52 and the second planetary gear mechanism 53 share the first internal gear 522, the first planetary gear set 524 is interposed between the first sun gear 521 and the first internal gear 522, and the first planetary gear set 524 is meshed with the first sun gear 521 and the first internal gear 522; the second planetary gear set 533 is interposed between the second sun gear 531 and the first internal gear 522, and the second planetary gear set 533 is meshed with the second sun gear 531 and the first internal gear 522; the first internal gear 522 is connected to the dc motor 40 through the motor flange interface 55, and the first internal gear 522 is fixedly fitted in the housing 10 at a position at the front end of the housing 10 through the front cover bracket 56.

The driving gear 41 of the dc motor 40 is engaged with the first planetary gear set 524 of the first planetary gear mechanism 52 to rotate the first planetary gear mechanism 52; the first planetary gear mechanism 52 can provide a deceleration effect for the rotation motion output by the dc motor 40, and the rotation motion output by the dc motor 40 is output by the first sun gear 521 after being decelerated; the first sun gear 521 of the first planetary gear mechanism 52 is meshed with the second planetary gear set 533 of the second planetary gear mechanism 53 to drive the second planetary gear mechanism 53 to rotate, and the second planetary gear mechanism 53 can provide a deceleration effect for the rotation of the first sun gear 521, and the rotation of the first sun gear 521 is decelerated and then output by the second sun gear 531.

The bevel gear set 54 includes a first bevel gear 541 and a second bevel gear 542, the first bevel gear 541 is connected to the second sun gear 531 of the second planetary gear mechanism 53, preferably, the first bevel gear 541 is connected to the second sun gear 531 in a sliding-key manner, for example, a wheel shaft of the first bevel gear 541 is slidably sleeved on the second sun gear 531 and can slide along an axial direction of the second sun gear 531, the second bevel gear 542 is assembled on a five-way main shaft 92 of the bicycle, the five-way main shaft 92 is a main shaft for driving a large gear set (chainwheels set) to rotate, and the first bevel gear 541 and the second bevel gear 542 are engaged with each other; after the rotational power output from the dc motor 40 is decelerated by the decelerator 51, the five-way main shaft 92 can be directly driven to rotate by the first bevel gear 541 and the second bevel gear 542, thereby providing the required assistance during the running of the bicycle.

In the preferred embodiment configuration of the present application, the transmission unit 50 of the power assisting device includes a one-way clutch, for example, a one-way bearing 57 (see fig. 4), and the second bevel gear 542 is mounted on the five-way main shaft 92 through the one-way bearing 57, so that the second bevel gear 542 will not be driven to rotate when the five-way main shaft 92 rotates backward (i.e., the five-way main shaft 92 can only drive the large gear to rotate in the forward direction of the bicycle in one way, and if the rotation direction of the five-way main shaft 92 is the same as the backward rotation direction of the bicycle wheel, the second bevel gear 542 will not be driven to rotate on the five-way main shaft 92, and the second bevel gear 542 will rotate idly when the five-way main shaft 92 rotates backward) to protect the dc motor 40 and the transmission unit 50.

The preferred embodiment configuration of the housing 10 further has an outer lid 12 that can be opened and closed, e.g., the outer lid 12 can be mounted to the housing 10 using a hinge 121, and the user can replace the rechargeable battery 20 or perform maintenance as necessary by opening the outer lid 12 (see fig. 7). In other aspects, the entire power assisting device may be a modular structure, in other words, the rechargeable battery 20, the electronic controller 30, the dc motor 40 and the transmission unit 50 are all integrally configured in the housing 10, and the housing 10 may be detached from the frame 90 of the bicycle to perform the entire replacement or maintenance operation if necessary.

The above-described embodiments and/or implementations are only for illustrating the preferred embodiments and/or implementations of the technology of the present application, and are not intended to limit the implementations of the technology of the present application in any way, and those skilled in the art can make modifications or changes to other equivalent embodiments without departing from the scope of the technology disclosed in the present application, but should be construed as technology or implementations substantially the same as the present application.

Claims (7)

1. A bicycle booster, comprising: a housing, a rechargeable battery, an electronic controller, a DC motor and a transmission unit assembled in the housing; the shell is assembled at a lower pipe of a bicycle frame, the shell is of a hollow tubular structure, the shell is provided with a control panel, the control panel at least comprises a starting switch and a charging socket, the starting switch and the charging socket are electrically connected with the electronic controller, the starting switch is used for switching on or off the power assisting device, and the electronic controller can be electrically connected with an external power supply through the charging socket so as to charge the rechargeable battery; the electronic controller is electrically connected with the rechargeable battery and the direct current motor, is provided with a detector for detecting the motion state of the bicycle and controls the operation of the direct current motor according to the motion state obtained by detection, and can be connected with an external power supply to charge the rechargeable battery and control the discharge of the rechargeable battery and provide a protection function; the transmission unit comprises a speed reducer consisting of a first planetary gear mechanism and a second planetary gear mechanism, and a bevel gear set, wherein the bevel gear set comprises a first bevel gear and a second bevel gear which are meshed with each other, the second bevel gear is assembled on a five-way main shaft of the bicycle, the direct current motor is connected with the input end of the speed reducer, the output end of the speed reducer is connected with the first bevel gear, the rotational power output by the direct current motor drives the first bevel gear after being reduced by the speed reducer, and the first bevel gear drives the second bevel gear and the five-way main shaft to rotate.

2. The bicycle booster of claim 1 wherein the rechargeable battery is a lithium ion battery pack comprising a plurality of lithium ion batteries.

3. The bicycle assist device according to claim 2, wherein the electronic controller comprises a battery control and protection circuit and a dc motor control circuit, the battery control and protection circuit comprises a lithium ion battery control chip and a protection chip for managing and controlling the lithium ion battery pack, and the protection function comprises any one or a combination of overcharge protection, overdischarge protection and overcurrent protection.

4. The bicycle assist device according to claim 3, wherein the DC motor control circuit controls the operation of the DC motor according to the detected motion state, the operation of the DC motor including: the DC motor starts, stops and outputs torque.

5. The bicycle assist device according to claim 1, wherein the first planetary gear mechanism comprises: a first sun gear, a first internal gear, a first planetary carrier, and a first planetary gear set rotatably mounted to the first planetary carrier, the first sun gear being fixed to a rotation center of the first planetary carrier, the first planetary gear set serving as an input of the reducer; the second planetary gear mechanism includes: a second sun gear, a second planet carrier, and a second planetary gear set rotatably mounted to the second planet carrier, the second sun gear being fixed to a rotation center of the second planet carrier, the second sun gear serving as an output end of the reduction gear; wherein the first planetary gear mechanism and the second planetary gear mechanism share the first internal gear, the first planetary gear set is between the first sun gear and the first internal gear, and the first planetary gear set is meshed with the first sun gear and the first internal gear; the second planetary gear set is arranged between the second sun gear and the first internal gear, and the second planetary gear set is meshed with the second sun gear and the first internal gear; the first internal gear is connected with the direct current motor through a motor flange interface and fixedly assembled in the shell at the front end of the shell through a front cover bracket; an output shaft of the DC motor is provided with a driving gear, and the driving gear is meshed with the first planetary gear set to drive the first planetary gear set to rotate.

6. The bicycle assist device according to claim 1, wherein the transmission unit includes a one-way bearing, and the second bevel gear is mounted to the five-way main shaft through the one-way bearing, and the second bevel gear is not driven to rotate when the five-way main shaft rotates backward.

7. The booster of claim 1 wherein the housing has an openable and closable cover, the cover being mounted to the housing with a hinge, the cover being openable to allow replacement of the rechargeable battery or maintenance.

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