WO2020220767A1

WO2020220767A1 - Power-assist wheel for battery-operated motor cycle

Info

Publication number: WO2020220767A1
Application number: PCT/CN2020/072648
Authority: WO
Inventors: 周永建
Original assignee: 周永建
Priority date: 2019-04-29
Filing date: 2020-01-17
Publication date: 2020-11-05
Also published as: CN209833372U

Abstract

A power-assist wheel for a battery-operated motor cycle comprises an axle (11) and a hub mounted on the axle (11). The hub comprises an outer hub ring (12), an inner hub ring (13), and spokes (14). A mounting cavity (15) is formed between the inner hub ring (13) and the axle (11). A scroll spring energy storage apparatus is provided in the mounting cavity (15). The scroll spring energy storage apparatus comprises an L-shaped support (21), a scroll spring (26), an outer rotor motor, a locking mechanism (25), and a linkage device. The L-shaped support (21) is fixed to the axle (11). The locking mechanism (25) is used to brake the outer rotor motor. The linkage device is used to cause the inner hub ring (13) to couple to or decouple from the outer rotor motor. The outer rotor motor comprises a stator (221) and a rotor (222). The stator (221) is fixed to the axle (11). The scroll spring (26) is wound on the rotor (222). An inner end of the scroll spring (26) is fixed to an outer circumference of the rotor (222), and an outer end of the scroll spring (26) is fixed to the L-shaped support (21). The power-assist wheel for the battery-operated motor cycle reduces an battery current output during activation of the battery-operated motor cycle, such that a battery continuously outputs a stable current, thereby effectively extending the service life of the battery of the battery-operated motor cycle.

Description

Electric motorcycle wheel

Technical field

The invention relates to the technical field of electric motorcycles, in particular to a power-assisted wheel for electric motorcycles.

Background technique

As an environmentally friendly means of transportation, electric motorcycles have now been widely used.

Summary of the invention

technical problem

In the prior art, an electric motorcycle needs a large starting current instantaneously when starting, and frequent starting will affect the service life of the battery. Therefore, it is urgent to design a booster wheel to reduce the instantaneous current output of the battery when the electric vehicle starts.

The solution to the problem

Technical solutions

The invention aims to provide a power-assisted wheel for an electric motorcycle to reduce the output of the battery current when the electric motorcycle is started, so that the battery continuously outputs a stable current, thereby effectively extending the service life of the electric motorcycle battery.

In order to achieve the above objective, the present invention provides a power-assisted wheel for an electric motorcycle, comprising an axle and a hub sleeved on the axle through a hub bearing. The hub includes a hub outer ring, a hub inner ring and connecting the hub outer ring and A number of spokes on the inner ring of the hub; an installation cavity is formed between the inner ring of the hub and the axle, and a vortex spring energy storage device is installed in the installation cavity. The vortex spring energy storage device includes an L-shaped bracket, A volute spring, an outer rotor motor, a locking mechanism and a coupling, one end of the L-shaped bracket vertical rod is fixed on the axle, one end of the L-shaped bracket transverse rod is a free end, the locking mechanism and The couplings are respectively located on both sides of the outer rotor motor in the axial direction, and the locking mechanism is used to brake the outer rotor motor. The outer rotor motor includes a stator and a rotor mounted on the outer circumference of the stator The stator is fixed on the axle, the spiral spring is wound on the outer circumference of the rotor, and the inner end of the spiral spring is fixed on the outer circumference of the rotor, and the outer end of the spiral spring is fixed On the L-shaped bracket crossbar, the coupling includes a fixed ring and a telescopic unit. One ring surface of the fixed ring is fixedly connected to one end of the rotor, and the other ring surface of the fixed ring has a first ring surface. The fixed end of the telescopic unit is fixed on the side wall of the inner ring of the hub, and the telescopic end of the telescopic unit has a second snap-fitting connection with the first snap-fit portion.

When the power-assisted wheel of the electric motorcycle provided by the above scheme stores energy, the outer rotor motor is separated from the locking mechanism and the control of the linkage, and the outer rotor motor starts forward rotation and drives the vortex spring to tighten the energy storage. When the vortex spring is tightened to a certain extent , The locking mechanism locks the outer rotor motor, the outer rotor motor stops rotating, and the energy storage is completed; when the energy is released, the telescopic unit extends so that the second clamping part and the first clamping part are combined together, and the locking mechanism is unlocked at the same time. The rotor motor rotates in the reverse direction under the action of the return force of the vortex spring, and then pushes the car body forward to start, thereby reducing the large current that is required instantly when the electric motorcycle starts.

Preferably, the telescopic unit includes a plurality of first telescopic members arranged around the axle and a movable ring installed at the telescopic end of the first telescopic member, and the second clamping portion is provided between the movable ring and the movable ring. On the opposite ring surface of the fixed ring, the first telescopic element includes a first sleeve fixedly connected to the side wall of the inner ring of the hub, a first electromagnet fixed on the inner end of the first sleeve, and a The first permanent magnet in the first sleeve, the movable ring is respectively connected with each of the first permanent magnets through a plurality of first connecting rods; the first permanent magnet and the first electromagnet are installed between There is a first tension spring.

Preferably, a plurality of the first electromagnets are connected in series.

Preferably, a sliding sleeve is installed between the inner ring surface of the movable ring and the circumferential surface of the axle.

Preferably, the first clamping part is a plurality of convex points or a plurality of concave points, and the second clamping part is a plurality of concave points or a plurality of convex points matched with the first clamping part.

Preferably, the locking mechanism includes a ratchet wheel and a ratchet brake assembly, the ratchet wheel is sleeved on the axle through a ratchet bearing and the ratchet wheel is fixedly connected with the outer rotor, and the ratchet brake assembly includes a second telescopic part And a brake pawl, the second telescopic part is located in the radial direction of the ratchet wheel and the fixed end of the second telescopic part is connected to the L-shaped bracket crossbar, and the brake pawl is fixed on the second telescopic part The telescopic end of the piece and the brake pawl engage/disengage with the ratchet wheel along with the expansion and contraction of the second telescopic piece.

Preferably, the second telescopic element includes a second sleeve fixedly connected to the L-shaped bracket, a first electromagnet fixed at the inner end of the second sleeve, and a slidable inside the second sleeve The second permanent magnet, the fixed end of the brake pawl is connected with the second permanent magnet through a second connecting rod; a second tension spring is installed between the second permanent magnet and the first electromagnet.

The beneficial effects of the invention

Brief description of the drawings

Description of the drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art.

Figure 1 is a side view of an electric motorcycle booster wheel provided by an embodiment of the invention;

Figure 2 is a schematic diagram of the structure in the inner ring of the hub in Figure 1;

Figure 3 is a schematic diagram of the installation of the locking mechanism in Figure 2;

Figure 4 is a schematic diagram of the structure of the telescopic unit in Figure 2;

In the attached picture:

11. Axle; 12. Outer ring of wheel hub; 13. Inner ring of wheel hub; 14. Spokes; 15. Mounting cavity; 16. Wheel bearing;

21. L-shaped bracket; 211, fixed sleeve; 221, stator; 222, rotor; 23, fixed ring; 231, first clamping part; 24, L-shaped bracket telescopic unit; 241, second clamping part; 242, Movable ring; 243, first sleeve; 244, first electromagnet; 245, first permanent magnet; 246, first connecting rod; 247, first tension spring; 248, sliding sleeve; 25, locking mechanism; 251, ratchet wheel; 252, ratchet bearing; 253, brake pawl; 254, second sleeve; 255, first electromagnet; 256, second permanent magnet; 257, second connecting rod; 258, second tension spring 259, the third connecting rod; 26, the vortex spring.

Invention embodiment

Embodiments of the invention

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

Fig. 1 is a side view of an electric motorcycle booster wheel provided by an embodiment of the invention; Fig. 2 is a schematic diagram of the inner ring of the hub in Fig. 1; Fig. 3 is a schematic diagram of the installation of the locking mechanism in Fig. 2; Fig. 4 is a telescopic view in Fig. 2 Schematic diagram of the unit structure.

As shown in Figures 1 to 4, the power-assisted wheel for an electric motorcycle provided by an embodiment of the present invention is a non-driving wheel of an electric motorcycle, and includes an axle 11 and a hub sleeved on the axle 11 through a hub bearing 16, and the hub includes The hub outer ring 12, the hub inner ring 13, and several spokes 14 connecting the hub outer ring 12 and the hub inner ring 13, a mounting cavity 15 is formed between the hub inner ring 13 and the axle 11, and a vortex spring is installed in the mounting cavity 15 Energy storage device.

In this embodiment, the diameter of the inner ring 13 of the hub is 1/2-3/5 of the inner diameter of the outer ring 12 of the hub, so that a larger space can be formed in the installation cavity 15 to install the vortex spring energy storage device, thereby improving the vortex spring Energy storage of energy storage device.

As shown in Figures 2 to 4, the volute spring energy storage device includes an L-shaped bracket 21, a vortex spring 26, an outer rotor motor, a locking mechanism 25, and a coupling. One end of the vertical rod of the L-shaped bracket 21 is fixed On the axle 11, one end of the cross bar of the L-shaped bracket 21 is a free end, the locking mechanism 25 and the coupling are respectively located on both sides of the outer rotor motor axial direction, and the locking mechanism 25 is used to brake the outer rotor motor The outer rotor motor includes a stator 221 and a rotor 222 mounted on the outer circumference of the stator 221. The stator 221 is fixed on the axle 11, the volute spring 26 is wound on the outer circumference of the rotor 222, and the inner end of the volute spring 26 is fixed On the outer circumference of the rotor 222, the outer end of the volute spring 26 is fixed on the inner wall of the inner ring 13 of the hub. The coupling includes a fixed ring 23 and a telescopic unit 24. A ring surface of the fixed ring 23 is fixedly connected to one end of the rotor 222, The other ring surface of the fixed ring 23 has a first clamping portion 231, the fixed end of the telescopic unit 24 is fixed on the side wall of the inner ring 13 of the hub, and the telescopic end of the telescopic unit 24 has a telescopic connection with the first clamping portion 231 The second card connector 241.

In this embodiment, the outer rotor motor is a mature motor in the prior art, and its structure is not repeated here. The fixing ring 23 and the rotor 222 can be directly fixed into one body, and the L-shaped bracket 21 is fixed by a fixing sleeve 21 On the axle 11, the stability of the L-shaped bracket 21 is improved.

The energy storage process of the power-assisted wheel of the electric motorcycle is preferably carried out when the electric motorcycle is stationary or braking, so as to avoid excessive consumption of the electric motorcycle battery power when the outer rotor motor tightens the vortex spring 26. During the energy storage process of the booster , The outer rotor motor is separated from the locking mechanism 25 and the coupling is controlled separately. The outer rotor motor rotates to drive the vortex spring to tighten and store energy. When the vortex spring is tightened to a certain degree, the locking mechanism 25 locks the outer rotor motor, and the energy storage is completed When the electric motorcycle starts, the telescopic unit 24 stretches so that the second clamping portion 241 and the first clamping portion 231 are combined together, while the locking mechanism 25 is unlocked, and the outer rotor motor rotates under the action of the return force of the vortex spring 26 , And then push the vehicle body forward to reduce the large current that is needed instantaneously when the electric motorcycle starts. After the energy is discharged, the telescopic unit 24 is separated from the fixed ring 23.

In this embodiment, it should be understood that the rotation direction of the outer rotor motor is opposite to the rotation direction of the hub during the energy storage process of the booster, and the rotation direction of the outer rotor motor is the same as the rotation direction of the hub during the energy release process of the booster. In addition, in this embodiment, timers are provided in the outer rotor motor, the telescopic unit 24, and the second telescopic member. The timer in the outer rotor motor is used to control the time for the vortex spring 26 to store and release energy, and the telescopic unit 24 The timer inside is used to control the linkage time between the inner ring 13 of the hub and the outer rotor motor, and the timer inside the second telescopic member is used to control the time when the brake pawl 253 is separated from the ratchet wheel 251.

When the power-assisted wheel of the electric motorcycle is stored, the timer in the outer rotor motor stops the energy storage rotation when the preset time is reached, and the timer in the second telescopic part also reaches the preset time for braking the ratchet 251. When the brake pawl 253 controls the outer rotor motor to relatively stop rotating; when the electric motorcycle assisted wheels are discharged, the telescopic unit 24 starts to make the inner ring 13 of the hub and the outer rotor motor link, and the vortex spring 26 starts to discharge energy. After setting the time, the telescopic unit 24 contracts to separate the inner ring 13 of the hub from the outer rotor motor.

As shown in Figures 2 and 4, this embodiment provides a better telescopic unit 24. Specifically, the telescopic unit 24 includes a plurality of first telescopic members arranged around the axle 11 and a telescopic member mounted on the first telescopic member. The second clamping portion 241 is provided on the ring surface of the movable ring 242 opposite to the fixed ring 23. The first telescopic member includes a first sleeve 243 fixedly connected to the side wall of the inner ring 13 of the hub, and is fixed to the The first electromagnet 244 at the inner end of a sleeve 243 and the first permanent magnet 245 slidably arranged in the first sleeve 243, the movable ring 242 is connected to each first permanent magnet 245 through a plurality of first connecting rods 246, respectively . A first tension spring 247 is installed between the first permanent magnet 245 and the first electromagnet 244.

In this embodiment, preferably, there are four first telescopic members, and the four first electromagnets 244 are connected in series. Through a unified switch control, when the first electromagnet 244 is powered, the first electromagnet 244 generates magnetic field repulsion. The first permanent magnet 245 slides outward until the second clamping portion 241 is mated and connected to the first clamping portion 231. When the first electromagnet 244 is de-energized, the first permanent magnet 245 is reset by the first tension spring 247 After sliding inside until the second clamping portion 241 is separated from the first clamping portion 231, the volute spring 26 can be charged again.

In this embodiment, preferably, a sliding sleeve 248 is installed between the inner ring surface of the movable ring 242 and the circumferential surface of the axle 11, and the provision of the sliding sleeve 248 helps reduce the friction between the movable ring 242 and the axle 11. This reduces the resistance that the movable ring 242 receives when it slides.

Preferably, the first clamping portion 231 is a plurality of convex points or a plurality of concave points, and the second clamping portion 241 is a plurality of concave points or a plurality of convex points to which the first clamping portion 231 is matched. In this embodiment, the first clamping portion 231 is a plurality of convex points, and the second clamping portion 241 is a plurality of concave points. The cooperation of the concave and convex points facilitates the quick combination of the movable ring 242 and the fixed ring 231.

As shown in FIG. 3, in this embodiment, the locking mechanism 25 includes a ratchet wheel 251 and a ratchet brake assembly. The ratchet wheel 251 is sleeved on the axle 11 through a ratchet bearing 252, and the ratchet wheel 251 is fixedly connected to the outer rotor 222. The brake assembly includes a second telescopic part and a brake pawl 253, the second telescopic part is located in the radial direction of the ratchet wheel 251 and the fixed end of the second telescopic part is connected to the cross bar of the L-shaped bracket 21, and the brake pawl 253 is fixed At the telescopic end of the second telescopic element and with the expansion and contraction of the second telescopic element, the ratchet wheel 251 is engaged/disengaged.

Specifically, the second telescopic element includes a second sleeve 254 fixedly connected to the L-shaped bracket 21, a second electromagnet 255 fixed at the inner end of the second sleeve 254, and a second permanent slidable inside the second sleeve 254. The fixed end of the magnet 256 and the brake pawl 253 is connected to the second permanent magnet 256 through the second connecting rod 257, and a second tension spring 258 is installed between the second permanent magnet 256 and the second electromagnet 255.

In this embodiment, the ratchet wheel 251 and the rotor 222 may be connected by a plurality of third connecting rods 259 evenly distributed around the axle 11.

In this embodiment, when the outer rotor motor rotates the vortex spring 26, the second electromagnet 255 supplies power to generate a magnetic field that repels the second permanent magnet 256 to slide outward until the brake pawl 253 is engaged with the ratchet 251, so that the outer rotor electric mechanism When the second electromagnet 255 is de-energized, the second permanent magnet 256 is reset by the second tension spring 258 to slide inward until the brake pawl 253 is separated from the ratchet wheel 251, and the volute spring 26 starts to loosen its energy.

The power-assisted wheel for an electric motorcycle provided in this embodiment can reduce the output of the battery current when the electric motorcycle is started, so that the battery continues to output a stable current, thereby effectively extending the service life of the electric motorcycle battery.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can comment on the foregoing within the scope of the present invention. The embodiment undergoes changes, modifications, substitutions and modifications.

Industrial applicability

Type a paragraph describing industrial applicability here.

Sequence Listing Free Content

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Claims

A power-assisted wheel for an electric motorcycle, comprising an axle (11) and a hub sleeved on the axle (11) through a hub bearing (16), the hub including an outer hub (12), an inner hub (13) and Several spokes (14) connecting the outer ring (12) of the hub and the inner ring (13) of the hub are characterized in that:

An installation cavity (15) is formed between the inner ring of the hub (13) and the axle (11), and a vortex spring energy storage device is installed in the installation cavity (15);

The volute spring energy storage device includes an L-shaped bracket (21), a volute spring (26), an outer rotor motor, a locking mechanism (25) and a coupling. One end of the L-shaped bracket (21) is fixed on the vertical rod On the axle (11), one end of the cross bar of the L-shaped bracket (21) is a free end, and the locking mechanism (25) and the coupling are respectively located on both sides of the outer rotor motor in the axial direction, The locking mechanism (25) is used to brake the outer rotor motor. The outer rotor motor includes a stator (221) and a rotor (222) mounted on the outer circumference of the stator (221). The stator ( 221) is fixed on the axle (11), the volute spring (26) is wound on the outer circumference of the rotor (222), and the inner end of the volute spring (26) is fixed on the rotor ( 222) On the outer circumference, the outer end of the volute spring (26) is fixed on the cross bar of the L-shaped bracket (21), the coupling includes a fixed ring (23) and a telescopic unit (24), the fixed ring (23) is fixedly connected to one end of the rotor (222), the other ring surface of the fixed ring (23) has a first clamping portion (231), and the telescopic unit (24) is fixed The end is fixed on the side wall of the inner ring (13) of the hub, and the telescopic end of the telescopic unit (24) has a second clamping portion (241) telescopically connected to the first clamping portion (231) .
The power-assisted wheel of an electric motorcycle according to claim 1, wherein the telescopic unit (24) includes a plurality of first telescopic parts arranged around the axle (11) and installed on the first telescopic part. The movable ring (242) at the telescopic end of the piece, the second clamping portion (241) is provided on the ring surface of the movable ring (242) opposite to the fixed ring (23), and the first telescopic piece includes and The first sleeve (243) fixedly connected to the side wall of the hub inner ring (13), the first electromagnet (244) fixed on the inner end of the first sleeve (243) and the first sleeve The first permanent magnet (245) in the cylinder (243), the movable ring (242) is connected to each of the first permanent magnets (245) through a plurality of first connecting rods (246), and the A first tension spring (247) is installed between a permanent magnet (245) and the first electromagnet (244).
The power-assisted wheel of an electric motorcycle according to claim 2, wherein a plurality of the first electromagnets (244) are connected in series.
The power-assisted wheel of an electric motorcycle according to claim 3, characterized in that a sliding sleeve (248) is installed between the inner ring surface of the movable ring (242) and the circumferential surface of the axle (11).
The power-assisted wheel of an electric motorcycle according to claim 4, wherein the first clamping portion (231) is a plurality of convex points or a plurality of concave points, and the second clamping portion (241) is A plurality of concave points or a plurality of convex points matched with the first clamping portion (231).
The power-assisted wheel of an electric motorcycle according to claim 1, wherein the locking mechanism (25) comprises a ratchet wheel (251) and a ratchet brake assembly, and the ratchet wheel (251) passes through a ratchet bearing (252) It is sleeved on the axle (11) and the ratchet wheel (251) is fixedly connected to the rotor (222). The ratchet brake assembly includes a second telescopic part and a brake pawl (253). The second telescopic part Located in the radial direction of the ratchet wheel (251) and the fixed end of the second telescopic member is connected to the cross bar of the L-shaped bracket (21), and the brake pawl (253) is fixed on the second telescopic member The telescopic end and the brake pawl (253) are engaged/disengaged with the ratchet wheel (251) along with the expansion and contraction of the second telescopic member.
The power-assisted wheel of an electric motorcycle according to claim 6, wherein the second telescopic member includes a second sleeve (254) fixedly connected to the cross bar of the L-shaped bracket (21), and The second electromagnet (255) at the inner end of the second sleeve (254) and the second permanent magnet (256) slidably arranged in the second sleeve (254), the brake pawl (253) The fixed end is connected to the second permanent magnet (256) through a second connecting rod (257), and a second tension spring (258) is installed between the second permanent magnet (256) and the second electromagnet (255) ).