CN113460212A

CN113460212A - Driving part of electric power-assisted bicycle

Info

Publication number: CN113460212A
Application number: CN202110645449.3A
Authority: CN
Inventors: 夏建敏; 何根华; 唐小卫; 何宏辉
Original assignee: Zhejiang Xiaxia Precision Manufacturing Co ltd
Current assignee: Zhejiang Xiaxia Precision Manufacturing Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-10-01
Anticipated expiration: 2041-06-10
Also published as: CN113460212B

Abstract

A driving part of an electric power-assisted bicycle comprises a shell, wherein a driving motor and a pedal shaft are arranged in the shell. The pedal shaft is provided with an anti-jamming wheel through a spline. First convex teeth are annularly distributed on the upper surface of the anti-blocking wheel. The outer shaft of the pedal is sleeved on the outer side of the pedal shaft. The inner side surface of the pedal outer shaft is provided with an annular anti-blocking cavity. The surface of one side of anti-sticking chamber is equipped with the second dogtooth that is used for with the first dogtooth meshing on the anti-sticking wheel, and the opposite side is fixed to be equipped with first elastic component. The one end activity that is close to the chain wheel of the outer axle of footboard is equipped with the conversion wheel, and one side of conversion wheel orientation footboard outer axle is equipped with first activity chamber, and first activity chamber bottom has set firmly the absorption assembly. The other end activity of outer axle of footboard is equipped with the return wheel, and the return wheel is equipped with the second and moves about the chamber towards the outer one side of axle of footboard, and the second activity chamber bottom is equipped with second elastic component. The invention simplifies the power-assisted design, effectively reduces the cost, and has simple maintenance and convenient replacement.

Description

Driving part of electric power-assisted bicycle

Technical Field

The invention relates to the field of moped, in particular to a transmission part of an electric moped.

Background

The booster bicycle is a new type two-wheel vehicle, belonging to a kind of bicycle, and using battery as auxiliary power source, and equipped with motor, and possesses power auxiliary system, and can implement manpower riding and motor-assisted integrated new type transportation means. With the explosive development of shared economy, the power-assisted bicycle has also entered people's daily life. Electric bicycle compares traditional bicycle that does not have helping hand and pure electric two-wheeled electric motor car as a new emerging kind of bicycle, and electric bicycle can provide power according to user's power of having an effect intelligently, guarantees when effectively reducing user fatigue and rides experience and security. In recent years, more and more attention has been paid to the use of electric power-assisted bicycles for walking and sports.

The conventional power-assisted bicycle needs a complex structure to realize a power-assisted function, and is high in cost and complex in maintenance.

Disclosure of Invention

In view of the above deficiencies in the prior art, the present invention provides a driving member for an electric power-assisted bicycle, which can realize a power-assisted function with a relatively simple structure.

In order to solve the technical problem, the invention is solved by the following technical scheme:

a driving part of an electric power-assisted bicycle comprises a shell, wherein a driving motor and a pedal shaft are arranged in the shell. Wherein: the side surface of the pedal shaft is provided with a spline groove, the spline groove is provided with an anti-blocking wheel through a spline, and the anti-blocking wheel can slide along the axial direction of the pedal shaft. First convex teeth are annularly distributed on the upper surface of the anti-blocking wheel, and a through sliding groove is formed in the position, corresponding to the spline groove, of the inner surface of the anti-blocking wheel; and one end of the pedal shaft is fixedly provided with a toothed disc along the axial direction.

The outer axle of footboard off-axial side cover is equipped with the footboard, and the outside surface of the outer axle of footboard has set firmly outer shaft gear, and outer shaft gear and the meshing of second intermediate gear, second intermediate gear set firmly on the second jackshaft. The inner side surface of the pedal outer shaft is provided with an annular anti-blocking cavity. The anti-sticking chamber's a side surface is equipped with the second dogtooth that is used for with the first dogtooth meshing on the anti-sticking wheel, and opposite side fixed mounting has first elastic component, and the one end that anti-sticking chamber surface was kept away from to first elastic component supports on the lower surface of anti-sticking wheel. The one end activity that is close to the chain wheel of the outer axle of footboard is equipped with the conversion wheel, and one side of conversion wheel orientation footboard outer axle is equipped with first activity chamber, and first activity chamber bottom has set firmly the absorption assembly. The other end activity of outer axle of footboard is equipped with the return wheel, and the return wheel is equipped with the second and moves about the chamber towards the outer one side of axle of footboard, and the second activity chamber bottom is equipped with second elastic component.

In a preferred embodiment, the housing comprises a mounting housing, a first housing cover and a second housing cover; first cap and second cap pass through the screw assembly to be fixed on the assembly shell, and the assembly is firm, stable in structure.

In a preferred embodiment, a motor mounting position is arranged in the assembly housing, and the driving motor is fixedly assembled in the motor mounting position.

In a preferred embodiment, one side of the assembling shell, which is far away from the mounting position, is provided with a circuit board mounting position, and a circuit board is fixedly assembled in the circuit board mounting position, so that the assembling is convenient to mount and the space is saved.

In a preferred embodiment, the first housing cover is fixedly mounted on the side of the pedal shaft remote from the crankset, and the second housing cover is fixedly mounted on the side of the pedal shaft where the crankset is mounted; the first shell cover is provided with a first through hole at a position corresponding to the pedal shaft, the second shell cover is provided with a second through hole at a position corresponding to the pedal shaft, and all structures are arranged in the shell except the pedal shaft which is necessary to be connected, so that the parts are protected.

In a preferred embodiment, a chain moving port is arranged on the side surface of the second shell cover corresponding to the chain wheel and used for connecting the driving device and the rear wheel through a chain.

In a preferred embodiment, the tooth profile of the first and second teeth is triangular.

In a preferred embodiment, a motor output gear is fixedly arranged at the end part of an output shaft of the driving motor, the motor output gear is meshed with a first middle gear A, the first middle gear A is fixedly arranged at one end of a first middle shaft, a first middle gear B is fixedly arranged at the other end of the first middle shaft, and the first middle gear B is meshed with a second middle gear, so that stable transmission is facilitated.

In a preferred embodiment, the motor output gear and the first middle A gear are cylindrical helical gears, so that the meshing performance is good; outer shaft gear, second intermediate gear and first middle second gear are the straight gear of cylinder, and bearing capacity is strong, durable.

In a preferred embodiment, bearings are arranged at the two ends of the pedal shaft corresponding to the first through hole and the second through hole, and the two ends of the pedal shaft are used for connecting the pedal crank.

Compared with the prior art, the invention has the following beneficial effects: the boosting structure is simplified and designed, the structure is simple, and the maintenance cost is low.

Drawings

Fig. 1 is a perspective view of the present invention.

FIG. 2 is a perspective view of the present invention with the second cover removed.

FIG. 3 is a perspective view of the present invention with the first cover removed.

Fig. 4 is a perspective view of the second housing cover.

Fig. 5 is a perspective view of the first housing cover.

Fig. 6 is a first perspective view of the matching of the gears.

Fig. 7 is a second perspective view of the matching of the gears.

Fig. 8 is a schematic plan view of the engagement of the gears.

Fig. 9 is a cross-sectional view of the pedal shaft and the pedal outer shaft after engagement.

Fig. 10 is a partial enlarged view of a portion a in fig. 9.

Fig. 11 is a perspective view of the pedal shaft.

Fig. 12 is a perspective view of the anti-jamming wheel.

The labels in the figure are:

1-a shell; 11-assembling the shell; 111-motor mounting location; 112-a circuit board mounting location; 12-a first housing cover; 121 — a first via; 13-a second housing cover; 131-a chain movable opening; 132-a second via;

2-pedal shaft; 21-spline; 22-anti-sticking wheel; 221-a first lobe; 222-a chute; 23-a dental plate;

3-pedal outer shaft; 31-outer shaft gear; 32-an anti-sticking cavity; 321-a second tooth; 322-a first resilient component; 33-a switching wheel; 331-a first active cavity; 332-an adsorption component; 34-a return wheel; 341-a second active chamber; 342-a second elastic component;

4-a first intermediate shaft; 41-first intermediate first gear; 42-first intermediate second gear; 5-a second intermediate shaft; 51-a second intermediate gear; 6-driving a motor; 61-motor output gear; 7-a circuit board; 8-bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, are exemplary only for explaining the present invention, and are not construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms: the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, and thus, should not be construed as limiting the present invention. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In describing the present invention, unless otherwise expressly specified or limited, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

An electric power assisted bicycle transmission comprises a housing 1, wherein the housing 1 comprises an assembling shell 11, a first shell cover 12 and a second shell cover 13. The first shell cover 12 and the second shell cover 13 are fixed on the assembling shell 11 through threaded assembling, assembling is firm, and the structure is stable. A motor mounting position 111 is arranged in the assembling shell 11, and a driving motor 6 is fixedly assembled in the motor mounting position 111. One side of the assembly shell 11 departing from the mounting position is provided with a circuit board mounting position 112, and a circuit board 7 is fixedly assembled in the circuit board mounting position 112, so that the assembly is convenient and the space is saved.

Be equipped with pedal axle 2 in the casing 1, the 2 side surfaces of pedal axle are equipped with the spline groove, and the spline groove position is equipped with anti-sticking wheel 22 through spline 21, and anti-sticking wheel 22 can be followed pedal axle 2 axial slip. First convex teeth 221 are annularly distributed on the upper surface of the anti-blocking wheel 22, and a through sliding groove 222 is formed in the inner surface of the anti-blocking wheel 22 corresponding to the groove of the spline 21. One end of the pedal shaft 2 is fixedly provided with a chain wheel 23 along the axial direction. The first shell cover 12 is fixedly assembled on one side of the pedal shaft 2 far away from the crankset 23, and the second shell cover 13 is fixedly assembled on one side of the pedal shaft 2 provided with the crankset 23; the first shell cover 12 is provided with a first through hole 121 at a position corresponding to the pedal shaft 2, the second shell cover 13 is provided with a second through hole 132 at a position corresponding to the pedal shaft 2, and all structures are arranged in the shell 1 except the pedal shaft 2 which is necessary to be connected, so that the parts can be protected. The side of the second housing cover 13 corresponding to the position of the chain wheel 23 is provided with a chain moving opening 131 for connecting the driving device and the rear wheel by a chain.

The outer axle 3 of footboard is equipped with to the outside cover of footboard axle 2, and the outside surface of the outer axle 3 of footboard has set firmly outer shaft gear 31, and outer shaft gear 31 and the meshing of second intermediate gear 51, second intermediate gear 51 set firmly on second jackshaft 5. The inner side surface of the pedal outer shaft 3 is provided with an annular anti-sticking cavity 32. One side surface of the anti-jamming cavity 32 is provided with a second convex tooth 321 used for being meshed with the first convex tooth 221 on the anti-jamming wheel 22, and the tooth shapes of the first convex tooth 221 and the second convex tooth 321 are triangular. The other side of the anti-jamming cavity 32 is fixedly provided with a first elastic component 322, and one end of the first elastic component 322, which is far away from the surface of the anti-jamming cavity 32, abuts against the lower surface of the anti-jamming wheel 22. One end of the pedal outer shaft 3 close to the chain wheel 23 is movably provided with a conversion wheel 33, one side of the conversion wheel 33 facing the pedal outer shaft 3 is provided with a first movable cavity 331, and the bottom of the first movable cavity 331 is fixedly provided with an adsorption component 332. The other end of the pedal outer shaft 3 is movably assembled with a return wheel 34, one side of the return wheel 34 facing the pedal outer shaft 3 is provided with a second movable cavity 341, and the bottom of the second movable cavity 341 is provided with a second elastic component 342.

Specifically, a motor output gear 61 is fixedly arranged at the end portion of an output shaft of the driving motor 6, the motor output gear 61 is meshed with a first middle first gear 41, the first middle first gear 41 is fixedly arranged at one end of a first middle shaft 4, a first middle second gear 42 is fixedly arranged at the other end of the first middle shaft 4, and the first middle second gear 42 is meshed with a second middle gear 51, so that stable transmission is facilitated.

In the application, the motor output gear 61 and the first middle first gear 41 are cylindrical helical gears, so that the meshing performance is good; the outer shaft gear 31, the second intermediate gear 51 and the first intermediate gear B42 are cylindrical spur gears, and are high in bearing capacity and durable.

In this application, the positions of the two ends of the pedal shaft 2 corresponding to the first through hole 121 and the second through hole 132 are provided with bearings 8, and the end parts of the two ends of the pedal shaft 2 are used for connecting a pedal crank.

The device has two modes of a riding mode and a power-assisted mode, when the device is in the riding mode, the motor is in a standby state, and the second convex tooth 321 in the anti-blocking cavity 32 of the pedal outer shaft 3 and the first convex tooth 221 of the anti-blocking wheel 22 on the pedal shaft 2 are in a separated state. When the boosting mode is turned on, the absorption component 332 in the switching wheel 33 is operated, the pedal outer shaft 3 moves towards the absorption component 332 and is fixed under the action of the absorption force, the second elastic component 342 in the return wheel 34 is in a stretching state, the first convex tooth 221 and the second convex tooth 321 are meshed, and the first elastic component 322 is in a compressing state. Meanwhile, when the motor is started, the output of the motor drives the gear to drive the first intermediate gear A41 to rotate, the first intermediate gear B42 coaxial with the first intermediate gear A41 drives the second intermediate gear 51 to rotate, the second intermediate gear 51 drives the outer shaft gear 31 to rotate, the pedal outer shaft 3 drives the pedal shaft 2 to rotate, and the power-assisted mode starts to work.

After the helping hand mode is opened, if the speed of outer axle 3 of footboard and footboard axle 2 does not match, the anti-sticking wheel 22 on the footboard axle 2 can be in first dogtooth 221 and the second dogtooth 321 down backward movement of resistance effect within a definite time, first elastic component 322 is compressed for the next meshing of the second dogtooth 321 of the first dogtooth 221 that promotes anti-sticking wheel 22 and the outer axle 3 of footboard, so relapse, avoid footboard axle 2 to be deadlocked under motor drive and manpower drive's combined action.

Compared with the prior art, the power assisting device has the advantages that the power assisting structure is simplified and designed, the structure is simple, and the maintenance cost is low.

The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

Claims

1. A transmission part of an electric power-assisted bicycle comprises a shell (1), a driving motor (6) and a pedal shaft (2) are arranged in the shell (1), and is characterized in that,

a spline groove is formed in the side surface of the pedal shaft (2), an anti-blocking wheel (22) is assembled in the spline groove through a spline (21), and the anti-blocking wheel (22) can axially slide along the pedal shaft (2); first convex teeth (221) are annularly distributed on the upper surface of the anti-sticking wheel (22), and a through sliding groove (222) is formed in the position, corresponding to the groove of the spline (21), of the inner surface of the anti-sticking wheel (22); one end of the pedal shaft (2) is fixedly provided with a chain wheel (23) along the axial direction;

the pedal outer shaft (3) is sleeved on the outer side of the pedal shaft (2), an outer shaft gear (31) is fixedly arranged on the outer side surface of the pedal outer shaft (3), the outer shaft gear (31) is meshed with a second intermediate gear (51), and the second intermediate gear (51) is fixedly arranged on a second intermediate shaft (5); the inner side surface of the pedal outer shaft (3) is provided with an annular anti-blocking cavity (32); a second convex tooth (321) which is used for being meshed with the first convex tooth (221) on the anti-blocking wheel (22) is arranged on the surface of one side of the anti-blocking cavity (32), a first elastic component (322) is fixedly assembled on the other side of the anti-blocking cavity, and one end, far away from the surface of the anti-blocking cavity (32), of the first elastic component (322) abuts against the lower surface of the anti-blocking wheel (22); one end of the pedal outer shaft (3) close to the chain wheel (23) is movably provided with a conversion wheel (33), one side of the conversion wheel (33) facing the pedal outer shaft (3) is provided with a first movable cavity (331), and the bottom of the first movable cavity (331) is fixedly provided with an adsorption component (332); the other end activity of footboard outer axle (3) is equipped with and restores wheel (34), restores wheel (34) and is equipped with second activity chamber (341) towards one side of footboard outer axle (3), and second activity chamber (341) bottom is equipped with second elastic component (342).

2. An electric power assisted bicycle transmission according to claim 1, characterized in that the housing (1) comprises a fitting housing (11), a first housing cover (12) and a second housing cover (13); the first shell cover (12) and the second shell cover (13) are fixed on the assembling shell (11) through threaded assembly.

3. An electric power assisted bicycle transmission according to claim 2, wherein the mounting case (11) is provided with a motor mounting location (111), and the driving motor (6) is fixedly mounted in the motor mounting location (111).

4. An electric bicycle transmission element according to claim 3, characterised in that a circuit board mounting location (112) is provided on the side of the mounting shell (11) facing away from the mounting location, the circuit board (7) being fixedly mounted in the circuit board mounting location (112).

5. An electric bicycle transmission according to claim 4, wherein the first housing cover (12) is fixedly mounted on the side of the pedal shaft (2) remote from the crankset (23), and the second housing cover (13) is fixedly mounted on the side of the pedal shaft (2) to which the crankset (23) is mounted; the first shell cover (12) is provided with a first through hole (121) at a position corresponding to the pedal shaft (2), and the second shell cover (13) is provided with a second through hole (132) at a position corresponding to the pedal shaft (2).

6. An electric bicycle transmission element according to claim 5, characterised in that the second cover (13) is provided with a chain moving opening (131) at a side corresponding to the chain wheel (23).

7. An electric power assisted bicycle transmission according to claim 1, wherein the first tooth (221) and the second tooth (321) are triangular in shape.

8. An electric power assisted bicycle transmission part according to claim 1, wherein the output shaft end of the driving motor (6) is fixedly provided with a motor output gear (61), the motor output gear (61) is meshed with a first intermediate gear (41), the first intermediate gear (41) is fixedly arranged at one end of a first intermediate shaft (4), the other end of the first intermediate shaft (4) is fixedly provided with a first intermediate gear B (42), and the first intermediate gear B (42) is meshed with a second intermediate gear (51).

9. An electric power assisted bicycle transmission according to claim 8, wherein the motor output gear (61) and the first intermediate a gear (41) are cylindrical helical gears; the outer shaft gear (31), the second intermediate gear (51) and the first intermediate gear B (42) are spur gears.

10. An electric bicycle transmission according to claim 1, wherein the pedal shaft (2) is provided with bearings (8) at its ends corresponding to the first (121) and second (132) through holes, the ends of the pedal shaft (2) being adapted to be connected to a pedal crank.