WO2016045006A1

WO2016045006A1 - Pedal shaft of electric bicycle

Info

Publication number: WO2016045006A1
Application number: PCT/CN2014/087255
Authority: WO
Inventors: 谢时化
Original assignee: 祥发金属工业股份有限公司; 谢时化
Priority date: 2014-09-24
Filing date: 2014-09-24
Publication date: 2016-03-31

Abstract

A pedal shaft of an electric bicycle, comprising: a pedal shaft assembly (9), a power source device (21), a shock absorber (34) and a frame (40); a second one-way bearing (12) of the pedal shaft assembly (9) is provided in an interface disc (10); in a power-driven mode, power is directly transmitted to a power input sprocket (13) via a chain by the power output shaft (22) of a power source device (21), and then is transmitted to a rear sprocket group (51) via an intermediate sprocket (14) and a large sprocket (15); and when the power input sprocket (13), the intermediate sprocket (14) and the large sprocket (15) rotate, the second one-way bearing (12) in the interface disc (10) is in an idling state, and no power is transmitted to the pedal shaft; thereby, in the power-driven mode, a pedal does not rotate, and the electric bicycle can perform a gear shifting operation; in addition, oscillating rotation shafts are pivotally connected to the pedal shaft, and the positions of two pivot point centers do not change when a rear wheel rotates up and down during riding, such that the chain can achieve an optimal transmission efficiency action without affecting a center distance and a height of a seat.

Description

Electric bicycle pedal shaft

Technical field

The utility model relates to the technical field of electric bicycles, in particular to a pedal shaft of an electric bicycle, which outputs electric power and a second one-way bearing in the joint disc to make the electric bicycle in electric mode by the first output shaft Shifting is also possible, while the pedal shaft is idling to prevent the user from being hit by the pedal; and the swinging arm and the pedal are centered to oscillate, so that the chain can maintain the best transmission efficiency.

Background technique

There are many kinds of pedals for electric bicycles. The following examples are given to illustrate: general bicycles are equipped with electric drive mechanisms for assisting users in saving the physical strength of the rear wheels. Since the electric bicycle transmissions are assembled on the rear or front wheels, In the electric mode, the rear wheel rotates and the toothed disc that is linked by the drive chain or the belt between the rear wheels is also driven, so that the pedal assembled on the toothed disc is also actuated. When the pedal is stepped on, the speed of the pedaling may be out of synchronization with the rotation speed of the motor, and the transmission element chain or the belt assembled to the rear wheel may easily cause the pedal under the double driving force of the user's pedaling speed and the motor being out of synchronization. Synchronous rotation with the pedal shaft assembly causes the drive chain to fall off, or the pedal is quickly rotated by the motor to cause the user's foot to be hit by the pedal;

At the same time, the electric bicycle can only perform the shifting shifting function in the manual mode. When switching to the electric mode, the shifting shift cannot be arbitrarily performed. When driving in the sloped area, the shifting position cannot be changed, resulting in the power source device being consumed and the power consumption. In addition, the rear suspension is installed by the rear frame directly on the free end of the shock absorber, and then the other free end of the shock absorber is directly fixed on the vehicle body; The vibration of the rear wheel can not be completely absorbed by the shock absorber, so that the residual vibration of the shock absorber is transmitted to the vehicle body, which makes the user feel uncomfortable, and the vibration also changes the center distance between the rear toothed disc group and the pedal shaft and the seat height. In order to reduce the transmission efficiency of the chain, the above-mentioned conventional shortcomings have plagued the relevant personnel for a long time, and it is necessary to improve them.

Utility model content

In view of the above problems, the utility model aims to provide a pedal shaft of an electric bicycle, which has the advantages of simple structure, convenient loading and unloading, convenient shifting and avoiding the user being hit by the pedal; and effectively improving the transmission efficiency. More practical.

In order to achieve the above object, the utility model discloses a pedal shaft of an electric bicycle, comprising: a pedal shaft assembly, a power source device, a shock absorber and a frame; wherein:

The pedal shaft assembly comprises: a pedal shaft, an input toothed disc, a middle toothed disc, a large toothed disc, and a second single a bearing, a pedal and a bonding disc, a groove is formed on one side of the center of the bonding disc, a through hole is formed in the center of the groove, and the second one-way bearing is inserted into the groove; the pedal shaft has a small radius One end of the engaging disc is inserted to the second one-way bearing opposite to the other side of the groove; and the second one-way bearing is locked by the fixing disc with a plurality of fixing screws locked to the other side of the groove;

The large toothed disc abuts against the other side of the engaging disc relative to the groove, and the middle toothed disc and the input toothed disc are sequentially sleeved by the pedal shaft into a side of the engaging disc having the groove; the large toothed disc And the middle toothed disc is fixed to the joint disc by a plurality of fixing screws, wherein the input rack is locked to the second one-way bearing; the power source device is disposed above the pedal shaft assembly, and The power source device is provided with a power output shaft, the power output shaft is provided with a first one-way bearing fixed to an output toothed disc, and the output toothed disc is coupled to the input toothed disc;

After a pivot hole of a swinging shaft is aligned with a pedal shaft hole of the frame, the pedal shaft of the pedal shaft assembly passes through the pivot hole and the pedal shaft hole, and then the two ends of the pedal shaft Pivoting a pedal; and the swinging shaft is coupled to a swinging arm that swings around the pedal shaft; and the frame is located at an end of the pedal shaft to lock the end of the shock absorber, and the other free end of the shock absorber The pivoting arm is pivotally connected to one end of a vibration connecting arm, and the vibration connecting arm pivots a point on the frame below the seat, and then pivots the other free end of the vibration connecting arm to the upper end of the rear frame.

Wherein, the power source device is mounted on the frame above the pedal shaft assembly.

Wherein, the vibration connecting arm transmits the vibration to the shock absorber with the frame as a fulcrum by using the lever principle.

Wherein, when the output toothed disc outputs power to the input toothed disc, the middle toothed disc and the large toothed disc are synchronously rotated, and at this time, the second one-way bearing generates an idle rotation, so that the pedal shaft and the pedal are kept stationary.

Wherein, when the pedal remains stationary, the input toothed disc, the middle toothed disc and the large toothed disc can still be passed through to convert the rear sprocket set, and the shifting function can still be maintained.

Through the above structure, the utility model can realize the function of shifting by converting the middle and large sprocket wheels to convert a rear sprocket wheel set, and can change the gear position when driving on the sloped area, so as to protect the power source device and save power. The purpose is also to save energy and protect the environment; use the principle of leverage to transmit the rear wheel vibration to the shock absorber centering on the fulcrum of the frame, so that the vibration is not transmitted to the frame and the rear wheel does not swing up and down. Change the height of the seat and pedal so that the center position of the two shaft points is unchanged, so that the chain can achieve the best transmission efficiency without affecting the center distance and the height of the seat.

DRAWINGS

Figure 1: Overall plan side view of an embodiment of the present invention.

2 is a perspective exploded view of an embodiment of the present invention.

3 is a schematic exploded view of the pedal shaft assembly of the embodiment of the present invention.

Figure 4 is a cross-sectional view of the pedal shaft assembly of the embodiment of the present invention.

Fig. 5 is a schematic view showing the operation of the rear frame of the embodiment of the present invention.

Fig. 6 is a schematic view showing the electric mode driving force of the embodiment of the present invention.

Figure 7 is a schematic diagram of a manual mode driving force of an embodiment of the present invention.

detailed description

Referring to FIG. 1 to FIG. 7 , an embodiment of the present invention provides a pedal shaft for an electric bicycle, which is applied to an electric bicycle, and includes: a pedal shaft assembly 9 , a power source device 21 , a shock absorber 34 , and a a frame 40; the pedal shaft assembly 9 includes: a pedal shaft 11, a second one-way bearing 12, an input toothed disk 13, a middle toothed disk 14, a large toothed disk 15, a pedal 16 and a joint disk 10, a recess 17 is formed in a central portion of the splice tray 10, a through hole is formed in the center of the recess 17, and the second one-way bearing 12 is inserted into the recess 17 of the splice tray 10; the pedal shaft 11 has a small radius a second end bearing 12 is affixed to the second one-way bearing 12 by the other end of the engaging disc 10 opposite to the recess 17; and the second one-way bearing 12 is locked by the engaging disc 10 by locking a plurality of fixing screws; The large toothed disc 15 abuts against the other side of the engaging disc 10 with respect to the groove 17, and the middle toothed disc 14 and the input striking disc 13 are sequentially inserted into the engaging disc 10 by the pedal shaft 11 and have the recess 17 And the large toothed disc 15 and the middle toothed disc 14 are fixed to the joint disc 10 through a plurality of fixing screws, and a plurality of fixing screws are locked by the input toothed disc 13 Attached to the second one-way bearing 12;

The power source device 21 is disposed on the frame 40 above the pedal shaft assembly 9, and the power source device 21 is provided with a power output shaft 22, the power output shaft 22 is provided with a first one-way bearing 20 and the first single The bearing 20 is fixed to an output sprocket 18, and the output sprocket 18 is coupled to the power sprocket 13;

Referring to Figures 2, 5, 6, and 7, a pivot hole 35 of a swing shaft 30 is aligned with a pedal shaft hole 43 of the frame 40, and the pedal shaft 11 of the pedal shaft assembly 9 passes through the pivot. a hole 35 and the pedal shaft hole 43, and the pedal 16 is pivoted at both ends of the pedal shaft 11; and the swing shaft 30 is coupled to a swing arm 52 that swings around the pedal shaft 11; and the frame 40 An end of the shock absorber 34 is locked above the pedal shaft hole 43. The other free end of the shock absorber 34 is pivotally connected to a vibration connecting arm 32, and the vibration connecting arm 32 is below a seat 42. After the frame 40 is pivoted, the other free end of the vibration connecting arm 32 is pivotally connected to the upper end of the rear frame 31; the vibration connecting arm 32 is centered on the pivot point 33 by a lever principle. A shock of the rear wheel 41 (not shown) is transmitted to the shock absorber 34 through the rear frame 31 so that vibration is not transmitted to the frame 40 and the pedal is moved by the swing arm 52 when the rear wheel 41 swings up and down. The shaft 11 is oscillated in the center, and does not change the height of a seat 42 and the pedal 16, and the pedal shaft assembly 9 drives the rear sprocket set 51 when the center position of the two shaft points is unchanged. Chain 50 can maintain optimum transmission efficiency and does not affect the operation of the center distance and the height of the seat 42.

Referring to FIG. 7, when the pedal 16 is stepped on in the manual mode, the pedal shaft 11 rotates synchronously with the pedal shaft assembly 9 to directly drive the rear sprocket set 51 and the output spur 18, but the output spur 18 The first one-way bearing 20 is idling and no driving force is transmitted to the power output shaft 22, thereby protecting the power source device 21; otherwise, referring to FIG. 6, the power source device 21 is permeable to the power source device 21 via the power output shaft 22 in the electric mode. When the output sprocket 18 outputs power to the input sprocket 13, the pedal shaft assembly 9 is synchronously rotated to drive the rear sprocket set 51, the pedal When the shaft assembly 9 (not shown) rotates synchronously, the second one-way bearing 12 (not shown) idles without transmitting driving force to the pedal shaft 11 and the pedal 16, so that the pedal 16 remains in a stationary posture; The large toothed disc 15 (not shown) and the middle toothed disc 14 (not shown) can be used to convert the rear sprocket set 51 to achieve a shifting function. When driving on a sloped area, the shift position can be changed. The purpose of the protection power source device 21 and power saving is achieved, and the energy saving and environmental protection effect is also achieved.

Claims

A pedal shaft of an electric bicycle includes: a pedal shaft assembly, a power source device, a shock absorber, and a frame; wherein:

The pedal shaft assembly comprises: a pedal shaft, an input toothed disc, a middle toothed disc, a large toothed disc, a second one-way bearing, a pedal and a joint disc, wherein a groove is provided on one side of the center of the joint disc a hole is formed in the center of the groove, and the second one-way bearing is inserted into the groove; the lower end of the pedal shaft is penetrated from the other side of the groove to the second one by the other side of the groove a bearing; and the second one-way bearing is locked by the plurality of fixing screws locked to the other side of the groove;

The large toothed disc abuts against the other side of the engaging disc relative to the groove, and the middle toothed disc and the input toothed disc are sequentially sleeved by the pedal shaft into a side of the engaging disc having the groove; the large toothed disc And the middle toothed disc is fixed to the joint disc by a plurality of fixing screws, wherein the input rack is locked to the second one-way bearing; the power source device is disposed above the pedal shaft assembly, and The power source device is provided with a power output shaft, the power output shaft is provided with a first one-way bearing fixed to an output toothed disc, and the output toothed disc is coupled to the input toothed disc;

After a pivot hole of a swinging shaft is aligned with a pedal shaft hole of the frame, the pedal shaft of the pedal shaft assembly passes through the pivot hole and the pedal shaft hole, and then the two ends of the pedal shaft Pivoting a pedal; and the swinging shaft is coupled to a swinging arm that swings around the pedal shaft; and the frame is located at an end of the pedal shaft to lock the end of the shock absorber, and the other free end of the shock absorber The pivoting arm is pivotally connected to one end of a vibration connecting arm, and the vibration connecting arm pivots a point on the frame below the seat, and then pivots the other free end of the vibration connecting arm to the upper end of the rear frame.
A pedal shaft for an electric bicycle according to claim 1, wherein the power source device is mounted on the frame above the pedal shaft assembly.
The pedal shaft of an electric bicycle according to claim 1, wherein the vibration connecting arm transmits a shock to the shock absorber with the frame as a fulcrum by a lever principle.
The pedal shaft of an electric bicycle according to claim 1, wherein when the output toothed disc outputs power to the input toothed disc, the middle toothed disc and the large toothed disc are synchronously rotated, and the second one-way bearing The idling is generated to keep the pedal shaft and the pedal stationary.
A pedal shaft for an electric bicycle according to claim 1, wherein in the electric mode, the input toothed disk, the middle toothed disk and the large toothed disk are still permeable to the rear toothed disk set while the pedal is held still , can still maintain the function of shifting.