CN109204673B

CN109204673B - Power take-off auxiliary device and electric scooter with same

Info

Publication number: CN109204673B
Application number: CN201811149749.7A
Authority: CN
Inventors: 张云鹤; 张旭; 张好
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2023-07-07
Anticipated expiration: 2038-09-29
Also published as: CN109204673A

Abstract

The invention relates to the field of transmission, in particular to a power output auxiliary device and an electric scooter with the same, which comprises the following components: the electric scooter comprises a first gear mechanism, a second gear mechanism, a third gear mechanism, a linkage mechanism and a power device, wherein the first gear mechanism, the second gear mechanism and the third gear mechanism are sequentially meshed and driven through the outer edges of the mechanisms, the linkage mechanism is arranged on the second gear mechanism and the third gear mechanism and is in stressed relation with the power device, and the first gear mechanism is in transmission connection with an external power source or a load.

Description

Power take-off auxiliary device and electric scooter with same

Technical Field

The invention relates to the field of transmission, in particular to a power output auxiliary device and an electric scooter with the same.

Background

Electric scooter, electric scooter. Electric scooters are a new product form of a further skateboard movement following a conventional skateboard. The electric scooter is very energy-saving, quick in charging and long in voyage capability, the whole electric scooter is attractive in appearance and convenient to operate, most of electric scooter adopts a lithium battery to be foldable, vehicles such as buses, subways and motor train units can be easily put on, in such fast-paced life, most people replace the electric scooter with walking tools when going on a journey, but the electric scooter is light in weight and small in size, the electric scooter is easy to move forwards when being electrified, when the electric scooter stops being electrified, due to the fact that the dead weight of the electric scooter is small, relative inertia is small, only the electric scooter stops being electrified, the speed of the electric scooter suddenly drops, and due to the fact that the inertia of people is larger than that of the electric scooter, people stand on pedals and fall easily at two time points of electrifying and outage.

Disclosure of Invention

In order to solve the technical problems, the invention discloses an electric scooter, which is characterized in that:

a power take-off assist device, comprising: the gear mechanism I, the gear mechanism II, the gear mechanism III, the linkage mechanism and the power device are sequentially meshed and driven through the outer edges of the gear mechanism I, the gear mechanism II and the gear mechanism III, the linkage mechanism is arranged on the gear mechanism II and the gear mechanism III and keeps a stressed relation with the power device, and the gear mechanism I is in transmission connection with an external power source or a load.

Further, the power device is a device capable of converting kinetic energy and potential energy into each other.

Further, the first gear mechanism comprises a first gear and a shaft, the shaft penetrates through the first gear, and the shaft is in interference fit with the first gear.

Further, the second gear mechanism comprises a second gear and a first positioning bearing, and the second gear is sleeved on the first positioning bearing.

Further, the gear mechanism III comprises a gear III and a positioning bearing II, and the gear III is sleeved on the positioning bearing II.

Further, the number of teeth and the modulus of the second gear mechanism are the same as those of the third gear mechanism.

Further, the linkage mechanism comprises a rotating piece, a sliding rod, a tension line and a fixed pulley I, a through hole is formed in the rotating piece, and the rotating piece is fixed on the end face of the gear mechanism II; the through hole is in clearance fit with the sliding rod, one end of the sliding rod penetrates through the through hole, the other end of the sliding rod is connected with a tension line, the tension line bypasses the fixed pulley I and is connected with the power device, and the tension line and the fixed pulley I keep a stressed relation; the fixed pulley I is fixed on the three end faces of the gear mechanism.

Further, the length of the sliding rod is equal to the distance from the second circle center of the gear mechanism to the third circle center of the gear mechanism.

Further, the power output auxiliary device comprises a second fixed pulley and a third fixed pulley, wherein the axis of the second fixed pulley and the axis of the third fixed pulley are parallel to the axis of the gear mechanism, and the power output auxiliary device is arranged below the gear mechanism.

Further, the tension line sequentially bypasses the fixed pulley II and the fixed pulley III, and the wire inlet direction and the wire outlet direction of the tension line on the fixed pulley II are opposite to the wire inlet direction and the wire outlet direction of the tension line on the fixed pulley III respectively.

Further, the third gear is an overrunning clutch with an external gear.

Further, the fixed pulley I is fixed on the side surface of the outer ring of the positioning bearing II.

Further, an electric scooter with a power output auxiliary device comprises a scooter body and a power box, wherein the power box is fixed on the scooter body, the scooter body comprises a scooter body, wheels and an axle, and the wheels are in linkage with the axle; the axle is rotatably arranged on the vehicle body; the power box comprises a power output auxiliary device and a box body, and a shaft of the power output auxiliary device is connected with the axle in a synchronous rotation mode through a belt.

Further, the box includes: the first side plate is provided with a mounting opening, a bearing is fixed in the mounting opening, and the bearing is sleeved on the shaft.

Further, the axial direction of the shaft is perpendicular to the belt rotation direction.

Further, the working method of the electric scooter during starting is as follows:

step one: the scooter body drives the power output auxiliary device to rotate: when the scooter body is started, the wheels sequentially drive the axle, the shaft, the first gear mechanism, the second gear mechanism and the third gear mechanism to rotate;

step two: the internal transmission part of the power output auxiliary device is linked: the gear mechanism II drives the rotating piece to rotate, and the gear mechanism III drives the fixed pulley I to rotate;

step three: the power device generates resistance: the rotating piece bypasses the fixed pulley I through the sliding rod to drive the tension line to move; under the drive of the tension line, the power device generates resistance, the rotation of the first gear mechanism, the second gear mechanism and the third gear mechanism is blocked, the resistance finally acts on the wheels through the first gear mechanism, the second gear mechanism, the third gear mechanism and the shaft, the acceleration of the wheels is reduced, and the electric scooter is started stably.

The advantages and effects are that:

according to the technical scheme provided by the invention, the starting requirement of the power output auxiliary device is used when the electric scooter is electrified, the situation that the scooter is moved forward after being electrified is limited, so that a driver cannot lean backwards easily under the condition that the inertia of the electric scooter is inconsistent, the inertia of the scooter is small at the moment of power failure of the electric scooter, the power output auxiliary device can output torque outwards after the electric scooter is operated under the state of being matched with the power output auxiliary device, the power output auxiliary device can continuously drive the electric scooter to advance after the electric scooter is powered off, and then the electric scooter can be stopped, so that the electric scooter cannot be decelerated suddenly, and the driver cannot lean forwards when the electric scooter is powered off.

Drawings

FIG. 1 is a schematic diagram of a power take-off assist device according to the present invention;

FIG. 2 is a schematic view of an electric scooter with a power take-off assist device according to the present invention;

FIG. 3 is a schematic top view of the power box of the present invention;

FIG. 4 is a schematic view of a rotor according to the present invention;

FIG. 5 is a schematic view of the structure of the case of the present invention;

FIG. 6 is a schematic diagram showing the analysis of the resistance of the power take-off auxiliary devices of different groups to the movement of the electric skateboard.

FIG. 7 is a second schematic diagram of the power output assist apparatus of the present invention;

fig. 8 is a schematic diagram of a power output auxiliary device according to the present invention.

Legend: 1. a scooter body; 11. a vehicle body; 12. a wheel; 13. an axle; secondly, a power box; third, the power output auxiliary device; 31. a first gear mechanism; 311. a first gear; 312. a shaft; 32. a gear mechanism II; 321. a second gear; 322. positioning a first bearing; 323. a first shaft; 33. a gear mechanism III; 331. positioning a second bearing; 332. a second shaft; 34. a linkage; 341. a rotating member; 3411. a through hole; 342. a slide bar; 343. a tension line; 344. a fixed pulley I; 35. a fixed pulley II; 36. a fixed pulley III; 37, a power device; 371. a first magnet; 372, magnet II; 301, state one; 302. a second state; 303 state three; 304. a fourth state; 4. a case; 41 side plate one; 411. a mounting port; 412. and (3) a bearing.

Detailed Description

The invention is further illustrated, but is not limited to, the following examples.

Example 1

As shown in fig. 1, a power output assist device 3 includes: the first gear mechanism 31, the second gear mechanism 32, the third gear mechanism 33, the linkage mechanism 34 and the power device 37, the first gear mechanism 31, the second gear mechanism 32 and the third gear mechanism 33 are sequentially meshed and driven through the outer edges of the mechanisms, the linkage mechanism 34 is arranged on the second gear mechanism 32 and the third gear mechanism 33 and keeps a force bearing relation with the power device 37, and the first gear mechanism 31 is in transmission connection with an external power source or a load. The power unit 37 is a unit capable of converting kinetic energy and potential energy into each other.

The first gear mechanism 31, the second gear mechanism 32 and the third external gear mechanism 33 are sequentially meshed, when the installation space is enough, the centers of the three circles can be installed on the same straight line, so that the subsequent overhaul can be facilitated, when the space is insufficient, the centers of the circles can be selected not to be installed on the same straight line, the requirement of the installation space can be reduced, preferably, the second gear mechanism 32 and the third gear mechanism 33 are gears of the same specification, the rotation of the second gear mechanism 32 and the third gear mechanism 33 can be synchronized, the rotation piece 341 on the second gear mechanism 32 and the third gear mechanism 33 can be further rotated synchronously with the first fixed pulley 344, and the power output auxiliary device 3 can be enabled to run stably.

The first gear mechanism 31 comprises a first gear 311, a shaft 312 passes through a central hole of the first gear as a power output/input end, the shaft 312 is in interference fit with the first gear 311, so that the shaft 312 and the first gear mechanism 31 synchronously rotate, the power output auxiliary devices 3 passing through the shaft 312 can be one group or multiple groups, the shaft 312 is connected with the axle 13 through a belt, the second gear mechanism 32 comprises a second gear 321, a first positioning bearing 322 is embedded in the central hole of the second gear 321, the first positioning bearing 322 is sleeved on a first shaft 323, the third gear mechanism 33 comprises a third gear 331, a second positioning bearing 332 is embedded in the central hole of the third gear, the second positioning bearing 332 is sleeved on a second shaft 333, the first shaft 323 and the second shaft 333 are positioned respectively or together with the same positioning device, the positioning device is positioned on one side, the movement of the sliding rod 342 cannot be influenced, and the positioning device can be a steel plate, a channel steel or the like.

The linkage mechanism 34 comprises a rotating member 341, a sliding rod 342, a tension line 343 and a fixed pulley 344, the rotating member 341 is arranged on the end face of the gear mechanism 32 through a ratchet mechanism, the rotating direction of the rotating member 341 is limited to be anticlockwise, the rotating member 341 limits the swinging of the sliding rod 342, under the cooperation of the sliding rod 342 and the rotating member 341, the gear 321 is limited to rotate clockwise, the rotating direction of each rotating member of the device is limited, the device cannot be inverted in the running process, the safety is improved, the fixed pulley 344 is arranged on the end face of the gear mechanism 33, the position of the fixed pulley 344 on the gear mechanism 33 is the same as the position of the rotating member 341 on the gear mechanism 32, the direction of the sliding rod 342 can be fixed, the fixed pulley 344 is further kept consistent by the force of the sliding rod 342, the stress balance of the fixed pulley 344, the whole device runs steadily, one end of the sliding rod 342 passes through a through hole 3411 on the rotating member 341 as shown in fig. 4, the top of one end of the rotating member 341 is limited, the other end can stably bear against the fixed pulley 344, the inner radius 342 is equal to the inner radius 342 of an arc of an opening, and the inner radius 342 is equal to the arc-shaped, and the length 342 is not wasted in the process of the arc-shaped device is generated, and the arc-shaped device is made to be too long when the inner radius 342 is equal to the arc-shaped, and the inner radius 342 of the fixed pulley 342 is too long is opposite to the fixed, and the arc-shaped, the device is made to be can be made to have a long length, and the device is can be can run too long, and can is can be made.

One end of a tension line 343 is connected with an arc-shaped opening end of the sliding rod 342, the other end of the tension line 343 sequentially clockwise bypasses the fixed pulley I344 and clockwise bypasses the fixed pulley II 35 and bypasses the fixed pulley III 36, then the tension line 343 is connected with one end of a spring, the fixed pulley II 35 and the fixed pulley III 36 respectively pass through and are fixed by different shafts, the other end of the spring is fixed on the lower bottom surface which is vertically connected with the side I41, the fixed pulley II 35 is adjacent to the fixed pulley III 36, the axis of the fixed pulley II is parallel to the axis of the gear mechanism III 33, the spring is arranged below the gear mechanism III 33, the tension line 343 is limited by the arrangement of the fixed pulley II 35 and the fixed pulley III 36, the tension line 343 swings along with the fixed pulley I344 after bypassing the fixed pulley I344, the fixed pulley II 35 and the fixed pulley III 36 are arranged at one time, or the outer edge of the fixed pulley II is tangent to the fixed pulley III, and then the power device 37 is not driven to swing after the tension line 343 swings left and right, so that the installation space is saved.

Meanwhile, the rotating piece 341 and the fixed pulley one 344 can be installed at the exchange position, namely, the rotating piece 341 is installed on the end face of the gear mechanism three 33, the fixed pulley one is installed on the section of the gear mechanism two 32, the connection relation between the sliding rod 342 and the garbage line 343 and the rotating piece 341 and the fixed pulley one 344 is unchanged, and at the moment, the installation position of the corresponding power device is correspondingly adjusted; two sets of linkage devices 34 can be installed at the same time, a set of power devices 37 is correspondingly added, and the two sets of linkage devices 34 can be installed in the same direction or in symmetrical positions.

The principle of operation of the power take-off assist device 3 is as follows as shown in fig. 3:

1. in the first state 301, the rotating member 341 is under the second gear mechanism 32, the first fixed pulley 344 is under the third gear mechanism 33, the end, connected with the tension line 343, of the sliding rod 342 abuts against the first fixed pulley 344, at this time, the sum of the tension force applied to the first fixed pulley 344 and the axial force is 0, that is, the tension force of the spring in the first state cannot rotate the third gear mechanism 33, external force is needed to intervene, that is, when the wheel 12 rotates, the first gear mechanism 31 is driven by the belt to drive the first gear mechanism 312, so that the power output auxiliary device 3 starts to move, the electric scooter moves forwards, the rotation direction of the wheel 12 is anticlockwise, so that the wheel 12 drives the shaft 312 to rotate anticlockwise, the shaft drives the first gear mechanism 31 to rotate anticlockwise, and the clockwise rotation of the second gear mechanism 32 is known.

2. The second state 302 is that the second gear mechanism 32 rotates 90 ° clockwise relative to the first state 301, the corresponding third gear 331 rotates 90 ° counterclockwise, the deformation of the spring is the largest, the first fixed pulley 344 is driven by the resultant force direction to rotate the third gear 331 clockwise, and the rotation direction of the third gear 331 is counterclockwise due to the limited rotation direction of the rotating member 341, that is, the tension of the spring in the second state can not rotate the third gear 331 clockwise, and external force is still needed to be interposed; the resistance to the electric skateboard 1 is suddenly changed from 0 in state one to the maximum and then gradually reduced to 0 during the movement of the power take-off aid 3 from state one 301 to state two 302 at this time to the movement of the electric skateboard 1.

3. The third state 303 is that the second gear 32 rotates 180 ° clockwise relative to the first state 301, the corresponding third gear 33 rotates 180 ° anticlockwise, at this time, the connecting end of the sliding rod 342 and the tension line 343 abuts against the first fixed pulley 344, the rotating member 341 is located right above the second gear 32, at this time, the resultant force of the first fixed pulley 344 is 0, the external force is needed to break through the critical point, then the third gear 33 is driven to rotate anticlockwise after the resultant force of the first fixed pulley 344 changes, that is, in this state, the resultant force of each component is balanced, the balance of the force is broken after the external force is needed, the spring tension can pull the third gear 33 to rotate, so as to drive the wheels to rotate, that is, when the power output auxiliary device moves from the second state 302 to the third state 303, the power to the electric slide 1 increases from 0 to the maximum and then the position of the third state suddenly changes to 0.

4. The fourth state 304 is that the second gear 32 rotates 270 ° clockwise relative to the first state 301, the third gear 33 rotates 270 ° counterclockwise, the sliding rod 342 slides out from the rotating member 341, the tension force of the first fixed pulley 344 is maximum, and the direction is to drive the third gear 33 to rotate counterclockwise, that is, in this state, the spring tension force drives the third gear 33 to rotate, no external force is needed, that is, when the power output auxiliary device moves from the third state 303 to the fourth state 304, the power to the electric skateboard 1 increases from 0 to the maximum, and when the fourth state 304 moves from the first state 301, the power to the electric skateboard 1 decreases from the maximum to 0.

The power unit 37 of the power output assisting apparatus 3 may use, in addition to a spring, a rubber band, a weight having a mass of more than 500g, a magnet unit, or the like as a power source.

In addition, when the power output auxiliary device 3 is used, the device groups can be added on the basis of 1 group, when the power output auxiliary device is added, the initial states of the devices of each group can be subdivided according to the different installation groups, so that the power output can be more stable, as shown in fig. 3, the device groups can be added on the right side of the external gear mechanism III 33, the torque can be increased after the power output auxiliary device is added, the two types of adding methods cannot be added without limitation, and the factors such as cost, installation space, required torque and the like are considered.

Example two

As shown in FIG. 7, the device in the scheme is identical to the device in the first embodiment in structure, except that the spring of the power device in the first embodiment is replaced by 0.5KG, the weight is connected to the tension line 343 and is not required to be fixed on the ground, so that the weight acts on the tension line 343 by means of self gravity, the spring in the first embodiment does work and is converted into gravity to do work, the device does not need to be fixed with the ground, and the device can be installed at a high place, thereby saving the ground space for other facilities to work.

The working principle in this embodiment is the same as that of the first embodiment, and will not be described here again.

Example III

As shown in FIG. 8, the device in this scheme is identical to the first embodiment in terms of structural parts, except that the springs of the power device in the first embodiment are replaced by a first magnet 371 and a second magnet 372 which are arranged in opposite homopolar directions, the peripheries of the two magnets are surrounded by a baffle plate, the second magnet 372 is fixed at the upper end of the baffle plate, the first magnet 371 is connected with a tension line 343 and can move up and down in the surrounding baffle plate, the homopolar poles of the two magnets are opposite, the tension force of the springs in the first embodiment is changed into the tension force of the two magnets due to the mutual thrust force generated by the same poles, and the scheme utilizes the homopolar repulsion principle of the magnets to generate tension force on the first fixed pulley 344, so that the device can be used in a gravity-free environment.

Example IV

The difference between the present embodiment and the first embodiment is that the third gear 331 of the third gear mechanism 33 in the present embodiment is an overrunning clutch with an external gear, and the rotating member 341 and the first fixed pulley 344 are respectively mounted on the outer ring side surfaces of the first and second positioning bearings.

Because the third gear 331 is replaced by the overrunning clutch with external gear, the working principle of the power output auxiliary device 3 is also changed, compared with the first embodiment, the state one of the embodiment is the same as the first embodiment, the difference is that the state two, three and four are that the overrunning clutch with external gear is replaced by the overrunning clutch with locking state and unlocking state, when the power output auxiliary device 3 is in the state one, the overrunning clutch is in the locking state same as the state one of the embodiment, when the overrunning clutch is in the state two, three and four, the overrunning clutch is in the unlocking state due to the resultant force of the overrunning clutch, the positioning second 332 and the fixed pulley 344 relatively rotate with the gear mechanism three 33, the acting force of the spring acting on the fixed pulley 344 cannot be transmitted to the gear mechanism three 33, namely the resistance force applied by the electric slide 1 in the state cannot be transmitted to the gear mechanism two 32 and the electric slide 1, namely, the state can be known through stress analysis, when the power output auxiliary device 3 rotates from the state three 303 to the state one, the power output auxiliary device 3 is blocked from the state one, the power output auxiliary device 3 does not act on the power output auxiliary device 3 and the fixed pulley 33 relatively rotates from the state two to the state one, and the rotating state two is not required to rotate with the fixed pulley 33 relatively to the fixed pulley 33.

Thus four states can be combined into two: 1, the power output auxiliary device hinders the movement of the electric skateboard, namely, the process of rotating from the first state to the second state, and 2, the power output auxiliary device does not hinder the movement of the electric skateboard, namely, the process of rotating from the second state to the third state, to the fourth state and then to the first state.

Example five

As shown in fig. 1, 2 and 3, an electric scooter with a power output assisting apparatus in a second embodiment includes: scooter body 1 and install the headstock 2 on scooter body 1, wherein scooter body 1 includes automobile body 11, wheel 12, axletree 13, headstock 2 installs on automobile body 11, surface mounting has the cushion on headstock 2, headstock 2 of having installed the cushion, on the one hand internally mounted power take off auxiliary device 3, on the other hand can also regard as electric scooter's seat to use, power take off auxiliary device 3 fixes inside box 4, fix the one end of power device 37 on the bottom surface of box 4, as shown in fig. 5, the curb plate one of box 4 is provided with mounting hole 411, mounting hole internally mounted bearing 412, axle 312 passes bearing 412, bearing 412 has the fixed action to axle 312, and make axle 312 can rotate around bearing 412, shaft 312 of power take off auxiliary device 3 passes through the belt and is connected with axletree 13 synchro, electric scooter is a scooter that relies on the generator drive to go forward, need not rely on the manpower drive, the driver can sit on electric scooter on the seat in the comfortable while, alleviate driver and the inertia is not unanimous for the driver to face upward and the scooter, the driver can lean on the headstock 2 when riding, the driver is not powered on.

The electric scooter provided with the auxiliary power device 3 is powered on, and the power output auxiliary device runs when the electric scooter is powered on and needs to give a certain torque to rotate, so that the action of the electric scooter that the electric scooter is instantaneously moved forward after being powered on is slowed down, and a driver is not easy to lean backwards and accelerate steadily under the condition that the momentum of the electric scooter is inconsistent.

When the electric scooter is started, the method comprises the following steps:

step one: the vehicle drives the power output auxiliary device to rotate: when the scooter body 1 is started, the wheels 12 sequentially drive the axle 13, the shaft 312, the first gear mechanism 31, the second gear mechanism 32 and the third gear mechanism 33 to rotate;

step two: the internal transmission part of the power output auxiliary device is linked: the gear mechanism II 32 drives the rotating piece 341 to rotate, and the gear mechanism III 33 rotates to drive the fixed pulley I344 to rotate;

step three: the power device generates resistance: the rotating piece 341 bypasses the fixed pulley one 344 through the sliding rod 342 to drive the tension line 343 to move; under the drive of the tension line 343, the power device 37 will generate a relative movement trend, and as the power device 37 will generate a force for blocking the trend, the blocking force finally acts on the wheel 12 through the transmission part, so that the electric scooter is started stably.

Therefore, when the electric scooter starts, under the action of the power output auxiliary device, the body can not adapt to the body backward tilting caused by speed change due to the over-fast starting speed in the starting moment and the starting process, and the starting is more stable.

Example six

The third difference between this embodiment and the third embodiment is that the power box 2 is internally provided with three groups of power output auxiliary devices 3, the relative positions of the fixed pulleys 361 of the three groups of power output auxiliary devices 3 are different, the fixed pulleys 344 of the first and second groups of power output auxiliary devices 3, and the included angles between the circle center connecting lines are 30 ° respectively, and due to the arrangement of the multiple groups of power output auxiliary devices 3, the electric scooter is more stable compared with the single group of power output auxiliary devices in the starting and accelerating processes, and the pause and frustration feeling in the starting and accelerating processes is reduced.

When the electric scooter is started: the wheel 12 rotates through the belt driving shaft 312, and the three sets of power output auxiliary devices connected with the shaft 312 start to rotate under the driving of the shaft 312, and the acting forces of the corresponding power devices 37 on the first fixed pulleys 344 are different due to the different positions of the first fixed pulleys 344 of the three sets of power output auxiliary devices, as can be seen from fig. 6: the three sets of power take-off aids are smoother to the resistance curve of electric skateboard for a set of power take-off aids for axle 312 atress is more even, and electric scooter is more steady in the start-up process.

It should be understood that the above-described embodiments of the present invention are provided by way of example only and are not intended to limit the scope of the invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Not all embodiments are exhaustive. All obvious changes or modifications which come within the spirit of the invention are desired to be protected.

Claims

1. A power take-off assisting device (3), characterized in that: it comprises the following steps: the device comprises a first gear mechanism (31), a second gear mechanism (32), a third gear mechanism (33), a linkage mechanism (34) and a power device (37), wherein the first gear mechanism (31), the second gear mechanism (32) and the third gear mechanism (33) are sequentially meshed and driven through the outer edges of the mechanisms, the linkage mechanism (34) is arranged on the second gear mechanism (32) and the third gear mechanism (33) and keeps a stressed relation with the power device (37), the first gear mechanism (31) is in transmission connection with an external power source or a load, and the linkage mechanism (34) comprises a rotating piece (341), a sliding rod (342), a tension line (343) and a fixed pulley I (344); the inside of the rotating piece (341) is provided with a through hole (3411), and the rotating piece (341) is fixed on the end face of the gear mechanism II (32); the through hole (3411) is in clearance fit with the sliding rod (342); one end of the sliding rod (342) passes through the through hole (3411), the other end of the sliding rod is connected with the tension line (343), the tension line (343) bypasses the fixed pulley I (344) to be connected with the power device (37), and the tension line (343) and the fixed pulley I (344) are in stressed relation; the fixed pulley one (344) is fixed on the end face of the gear mechanism three (33).

2. The power take-off auxiliary device (3) according to claim 1, characterized in that: the power device (37) is a device capable of converting kinetic energy and potential energy into each other.

3. The power take-off auxiliary device (3) according to claim 1, characterized in that: the first gear mechanism (31) comprises a first gear (311) and a shaft (312), the shaft (312) passes through the first gear (311), and the shaft (312) is in interference fit with the first gear (311).

4. The power take-off auxiliary device (3) according to claim 1, characterized in that: the gear mechanism II (32) comprises a gear II (321) and a positioning bearing I (322), and the gear II (321) is sleeved on the positioning bearing I (322).

5. The power take-off auxiliary device (3) according to claim 1, characterized in that: the gear mechanism III (33) comprises a gear III (331) and a positioning bearing II (332), and the gear III (331) is sleeved on the positioning bearing II (332).

6. The power take-off auxiliary device (3) according to claim 1, characterized in that: the number of teeth and the modulus of the gear mechanism II (32) are the same as those of the gear mechanism III (33).

7. The power take-off auxiliary device (3) according to claim 1, characterized in that: the length of the sliding rod (342) is equal to the distance from the center of the second gear mechanism (32) to the center of the third gear mechanism (33).

8. The power take-off auxiliary device (3) according to claim 7, characterized in that: the power output auxiliary device (3) comprises a fixed pulley II (35) and a fixed pulley III (36), wherein the axis of the fixed pulley II (35) and the axis of the fixed pulley III (36) are parallel to the axis of the gear mechanism III (33), and the power output auxiliary device is arranged below the gear mechanism III (33).

9. The power take-off auxiliary device (3) according to claim 8, characterized in that: the tension wire (343) sequentially bypasses the fixed pulley II (35) and the fixed pulley III (36), and the wire inlet direction and the wire outlet direction of the tension wire (343) on the fixed pulley II (35) are opposite to the wire inlet direction and the wire outlet direction of the tension wire (343) on the fixed pulley III (36) respectively.

10. The power take-off auxiliary device (3) according to claim 5, characterized in that: and the third gear (331) is an overrunning clutch with an external gear.

11. The power take-off auxiliary device (3) according to claim 10, characterized in that: the fixed pulley one (344) is fixed on the outer ring side surface of the positioning bearing two (332).

12. An electric scooter equipped with the power take-off assisting apparatus (3) as claimed in claim 11, characterized in that: the scooter comprises a scooter body (1) and a power box (2), wherein the power box (2) is fixed on the scooter body (1), the scooter body (1) comprises a scooter body (11), wheels (12) and an axle (13), and the wheels (12) are linked with the axle (13); the axle (13) is rotatably arranged on the vehicle body (11); the power box (2) comprises a power output auxiliary device (3) and a box body (4), the power output auxiliary device (3) is fixedly arranged inside the box body (4), and a shaft (312) of the power output auxiliary device (3) is connected with an axle (13) in a synchronous rotation mode through a belt.

13. The electric scooter of claim 12, wherein: the case (4) includes: a first side plate (41); the first side plate (41) is provided with a mounting opening (411), a bearing (412) is fixedly arranged in the mounting opening (411), and the bearing (412) is sleeved on the shaft (312).

14. The electric scooter of claim 12, wherein: the axial direction of the shaft (312) is perpendicular to the belt rotation direction.

15. The electric scooter of any one of claims 12-14, wherein the method of operation of the electric scooter when started is as follows:

step one: the scooter body drives the power output auxiliary device to operate:

when the scooter body (1) is started, the wheels (12) sequentially drive the axle (13), the shaft (312), the first gear mechanism (31), the second gear mechanism (32) and the third gear mechanism (33) to rotate;

step two: the internal transmission part of the power output auxiliary device is linked:

the gear mechanism II (32) drives the rotating piece (341) to rotate, and the gear mechanism III (33) drives the fixed pulley I (344) to rotate;

step three: the power device generates resistance:

the rotating piece (341) bypasses the fixed pulley I (344) through the sliding rod (342) to drive the tension line (343) to move; under the drive of the tension line (343), the power device (37) generates resistance, the rotation of the first, second and third gear mechanisms (31, 32, 33) is blocked, the resistance finally acts on the wheel (12) through the first, second and third gear mechanisms (31, 32, 33) and the shaft (312), the acceleration of the wheel (12) is reduced, and the electric scooter is started stably.