CN102180221A - Variable speed scooter - Google Patents

Abstract

The invention relates to the technical field of scooters, in particular to a speed-changing scooter, which includes a body, a front wheel, a rear wheel and a drive system, the body includes a power lever and a body bracket, and the body bracket is provided with an upper power shaft, The front power shaft and the rear power shaft. The power lever is set on the upper power shaft. The drive system includes a power system and a return system. The power system includes an eccentric wheel and a gear transmission system. The system drive is connected to the rear power shaft, the power lever is driven to be connected to the eccentric wheel, and the rear wheel is arranged on the rear power shaft. Through the use of eccentric wheels, the speed-changing scooter saves effort, the speed-changing process is simple, and the pedaling stroke angle can be changed to achieve different speeds, which meets the needs of high power uphill and fast speed on flat ground.

Description

A variable speed scooter

technical field

The invention relates to the technical field of scooters, in particular to a variable-speed scooter.

Background technique

The scooter can be used as an entertainment product for children and adults in their leisure time, a means of transportation for people to travel at close distances, fitness equipment, etc. , easy to learn, suitable for multi-level fields and people of many ages to use and so on.

The Chinese utility model patent No. 97230502.5 introduces a pedal skateboard, which is composed of a seesaw, a bracket, a wire rope, a flywheel, a guide pulley, and front and rear wheels. The wire ropes installed at both ends of the seesaw are connected with the flywheel through guide pulleys. When the seesaw moves up and down, the wire rope drives the flywheel to rotate, and the rear wheel slides forward in conjunction with the rear wheel.

The Chinese Utility Model Patent No. 01237990.5 introduces a driving device for a scooter that utilizes human power to generate power for games, fitness, or transportation. The utility model comprises wheels, the pedals are hinged flexibly on the vehicle body frame, and a transmission device capable of driving the wheels to rotate is arranged between the pedals and the wheels.

The Chinese Utility Model Patent No. 200920078968.0 discloses a reciprocating speed change pedal structure for a scooter, which has a power pressure rod that can be movably connected to the scooter frame, and it also has a power pressure rod that can flex upwards. The upper end of the power pressure rod is movably connected with the movable pedal through the shaft, and the movable pedal is divided into two parts: the movable pedal limit end and the movable pedal labor-saving end, and the front part of the movable pedal limit end is connected with the vehicle. A movable connection member capable of limiting the range of motion of the movable pedal is arranged between the brackets.

But the scooter of several disclosed repetitive trampling motions has heavy starting (or stepping on a large stroke, causing a large angle of motion), large stepping force in motion, and people's feet are prone to acid and fatigue in a short period of time. There are no structural labor-saving and speed-changing effects, making it difficult to go uphill.

Contents of the invention

The purpose of the present invention is to provide a speed-changing scooter to address the deficiencies of the prior art. The speed-changing scooter is labor-saving, the speed-changing process is simple, the force changes from light to heavy, and the speed increases with the increase of force.

The present invention is achieved through the following technologies: a speed-changing scooter, including a vehicle body, a front wheel, a rear wheel and a drive system, the vehicle body includes a power lever and a body bracket, and the body bracket is provided with an upper power shaft, a front power shaft and a The rear power shaft, the power lever is arranged on the upper power shaft, the drive system includes a power system, the power system includes an eccentric wheel and a gear transmission system, the eccentric wheel is arranged on the front power shaft, and the front power The rotating shaft is drivingly connected to the rear power rotating shaft through the gear transmission system, the power lever is drivingly connected to the eccentric wheel, and the rear wheel is arranged on the rear power rotating shaft.

The number of the drive system is one, the number of the power lever is one, the drive system is arranged on the left or right side of the vehicle body bracket, one drive system is connected to one power lever, the The drive system also includes a return system.

Or, the number of the drive system is two, the number of the power lever is one, and the two drive systems are respectively arranged on the left side and the right side of the vehicle body bracket, and the two drive systems are connected to One of the power levers, the drive system also includes a return system.

Or, the number of the drive system is two, the number of the power lever is two, and the two drive systems are respectively arranged on the left side and the right side of the vehicle body bracket, and the drive system on the left side is connected to A power lever, the drive system on the right is connected to another power lever.

Wherein, the power lever is fixed with a sprocket, and the sprocket is provided with a sprocket chain, and the sprocket chain is drivingly connected to the eccentric wheel.

Preferably, the eccentric wheel is provided with a chain escape end.

Preferably, the eccentric wheel is provided with an eccentric wheel hook, one end of the tooth chain is hooked to the eccentric hook, the chain tooth is provided with a chain hook, and the other end of the chain is The end hook is arranged on the chain tooth hook.

Wherein, the gear transmission system includes a front power gear, a one-way flywheel, a rear power gear and a power chain, the front power gear is arranged on the one-way flywheel, the one-way flywheel is arranged on the front power shaft, and the rear The power gear is arranged on the rear power shaft, and the front power gear is drivingly connected to the rear power gear through the power chain.

Alternatively, the return system includes a return gear, a return chain, a return guide wheel and a return fixing column, the return gear is arranged on the front power shaft, and the return fixing column is arranged on the The power lever, the return gear is connected to the return fixing post through a return chain, and the return guide wheel is fixed to the vehicle body bracket.

The return system includes a return gear and a return spring, the return gear is arranged on the front power shaft, one end of the return spring is fixed to the vehicle body bracket, and the other end of the return spring passes through The return chain is connected to the return gear.

The beneficial effects of the present invention are: the variable speed scooter includes a vehicle body, a front wheel, a rear wheel and a drive system, the vehicle body includes a power lever and a body bracket, and the body bracket is provided with an upper power shaft, a front power shaft and a rear power shaft , the power lever is set on the upper power shaft, the drive system includes a power system and a return system, the power system includes an eccentric wheel and a gear transmission system, the eccentric wheel is set on the front power shaft, and the front The power shaft is drivingly connected to the rear power shaft through the gear transmission system, the power lever is drivingly connected to the eccentric wheel, and the rear wheel is arranged on the rear power shaft. During power output, the power lever drives the eccentric wheel to rotate counterclockwise, the eccentric wheel drives the front power shaft to rotate counterclockwise, the front power shaft drives the rear power shaft to rotate counterclockwise through the gear transmission system, and the rear power shaft drives the rear wheel to rotate counterclockwise to achieve power output. output purpose. Through the use of the eccentric wheel, the speed-changing scooter saves effort, the speed-changing process is simple, and the travel angle of the pedaling can be changed to achieve different speeds, which meets the needs of high power uphill and fast speed on flat ground.

Description of drawings

Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a partially enlarged structural schematic diagram of Embodiment 1 of the present invention.

Fig. 3 is a schematic diagram of the first structure of the eccentric wheel in Embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of the second structure of the eccentric wheel in Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the third structure of the eccentric wheel in Embodiment 1 of the present invention.

Fig. 6 is a schematic diagram of the fourth structure of the eccentric wheel in Embodiment 1 of the present invention.

Fig. 7 is a schematic diagram of the fifth structure of the eccentric wheel in Embodiment 1 of the present invention.

Fig. 8 is a first reference state diagram of the eccentric wheel when pedaling in Embodiment 1 of the present invention.

Fig. 9 is a second reference state diagram of the eccentric wheel when pedaling in Embodiment 1 of the present invention.

Fig. 10 is a third reference state diagram of the eccentric wheel when pedaling in Embodiment 1 of the present invention.

Fig. 11 is a schematic structural view of the power lever in low-speed stepping according to Embodiment 1 of the present invention.

Fig. 12 is a schematic structural view of the eccentric wheel in embodiment 1 of the present invention when stepping at a low speed.

Fig. 13 is a schematic diagram of the structure of the power lever when stepping at a medium speed in Embodiment 1 of the present invention.

Fig. 14 is a schematic structural view of the eccentric wheel in the middle-speed stepping method in Embodiment 1 of the present invention.

Fig. 15 is a schematic structural view of the power lever during high-speed stepping according to Embodiment 1 of the present invention.

Fig. 16 is a schematic structural view of the eccentric wheel during high-speed pedaling according to Embodiment 1 of the present invention.

Fig. 17 is a partially enlarged schematic structural view of Embodiment 1 of the present invention with a power guide wheel.

Fig. 18 is a schematic diagram of a partial structure of Embodiment 2 of the present invention.

Fig. 19 is a schematic diagram of a partial structure on the right side of Embodiment 3 of the present invention.

Fig. 20 is a schematic diagram of the partial structure on the left side of Embodiment 3 of the present invention.

Fig. 21 is a schematic view of the partial structure on the right side of Embodiment 4 of the present invention.

Fig. 22 is a schematic diagram of the partial structure on the left side of Embodiment 4 of the present invention.

Wherein, Fig. 1 to Fig. 22 include:

1 - front wheel

2 - rear wheel

3 - power lever

4——Main bracket

5——Power fixed piece

6——Sprocket

7——eccentric wheel

8—one-way flywheel

9 - Front power gear

10 - rear power gear

11——Gear chain

12 - power chain

13——upper power shaft

14——Front Power Shaft

15——Rear power shaft

16——Chain escape end

17——Front end pedaling point

18——Rear end pedaling point

19 - Point A

20 - Point B

21 - Point C

22——Smooth wheel

23——Power Guide Wheel

24——return gear

25——Return fixed column

26——return chain

27——Return guide wheel

28——return spring

29——rear guide wheel

30——eccentric wheel hook

31——sprocket hook.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

Example 1.

See Fig. 1 and Fig. 2, a kind of variable speed scooter, comprise vehicle body, front wheel 1, rear wheel 2 and driving system, vehicle body comprises power lever 3 and body support, body support comprises main support 4 and power fixing plate 5, power fixing The sheet 5 is provided with an upper power shaft 13 , a front power shaft 14 and a rear power shaft 15 , and the power lever 3 is arranged on the upper power shaft 13 . This embodiment is a single power output structure, the number of the drive system is one, the number of the power lever 3 is one, the drive system is arranged on the right side of the vehicle body support, the drive system is connected to the power lever 3, and the power lever 3 is from opening to closing , has a power output; the power lever 3 returns from closing to opening, and has no power output.

The drive system includes a power system and a return system. The power system includes an eccentric wheel 7 and a gear transmission system. The eccentric wheel 7 is arranged on the front power shaft 14, and the front power shaft 14 is driven and connected to the rear power shaft 15 through the gear transmission system. The power lever 3 The drive is connected to the eccentric wheel 7, and the rear wheel 2 is arranged on the rear power rotating shaft 15. During power output, the power lever 3 drives the eccentric wheel 7 to rotate counterclockwise, the eccentric wheel 7 drives the front power shaft 14 to rotate counterclockwise, the front power shaft 14 drives the rear power shaft 15 to rotate counterclockwise through the gear transmission system, and the rear power shaft 15 drives the rear Wheel 2 rotates counterclockwise to achieve the purpose of power output.

As shown in Fig. 2, the power lever 3 is fixed with a sprocket 6, and the sprocket 6 is provided with a sprocket chain 11, and the sprocket chain 11 is drivingly connected to the eccentric wheel 7. Of course, the power lever 3 can also drive the eccentric wheel 7 in other ways.

The main effect of eccentric wheel 7 is to apply torsion force to front power rotating shaft 14, is the middle torsion belt of power output, also is the core technology that makes the present invention can reach low, middle, high etc. arbitrary speed change. The eccentric wheel 7 is designed as an eccentric gear provided with a chain avoidance end 16 as shown in Figure 3, so that the transmission stroke of the eccentric wheel 7 can exceed 360 degrees without overlapping the chains, thereby ensuring that in a single transmission process The front power rotating shaft 14 can rotate more stroke angles, and has bigger speed change. Certainly, the eccentric wheel 7 can be designed as an eccentric elliptical gear as shown in FIG. 4 . Eccentric wheel 7 also can not have tooth equally, and is directly designed as the eccentric wheel 7 that is provided with chain avoidance end 16 as shown in Figure 5 or the eccentric ellipse wheel as shown in Figure 6, by the transmission medium such as steel bar Used together, the same effect can be achieved.

As shown in Figure 7, the eccentric wheel 7 can further be provided with an eccentric wheel hook 30, the end of the tooth plate chain 11 is hooked to the eccentric wheel hook 30, and the chain tooth plate 6 is provided with a chain tooth plate hook 31, as shown in Figure 2 , the other end hook of the tooth plate chain 11 is located at the chain tooth plate hook 31, and the mode of hooking is more convenient and firm than the traditional pin type.

As shown in Figure 2, the gear transmission system includes a front power gear 9, a one-way flywheel 8, a rear power gear 10 and a power chain 12, and the front power gear 9 is locked to the one-way flywheel 8 by screws, and the one-way flywheel 8 of the present embodiment is provided with On the front power shaft 14, of course the one-way flywheel 8 of this embodiment can also be arranged on the rear power shaft 15, which does not affect the effect of the present invention. The rear power gear 10 is arranged on the rear power shaft 15, and the front power gear 9 passes through the power chain 12 is drivingly connected to the rear power gear 10. The structure of the one-way flywheel 8 adopts the prior art. When the one-way flywheel 8 rotates clockwise, it cannot drive the front power shaft 14 to rotate, and there is no power output. When the one-way flywheel 8 rotates counterclockwise, it can drive the front power shaft 14 to rotate, and there is power output. .

Considering the comfortable state of people when they are stepping on the stairs, according to the fact that the height difference between the front and rear feet is about 160mm in the natural climbing of stairs, the rotation angle of the power lever 3 is usually fixed so that the travel range of the stepping point 17 at the front end of the power lever 3 is between the same as the rear. On the premise that the end pedal point is 180% level, the drop between the front and rear feet is about 160mm, which can make people more natural and comfortable when pedaling, and it is not easy to make the feet sore after long-term pedaling. But such a design will reduce the stroke of the power lever 3 and reduce the power output. In order to keep the power output unchanged, the outer diameter of the eccentric wheel 7 and the rear power gear 10 is designed to be smaller than the outer diameter of the front power gear 9 , as shown in Figure 2, the chain stroke required for the eccentric wheel 7 to rotate a circle will also be reduced, and the design of the chain avoidance structure of the eccentric wheel 7 makes the eccentric wheel 7 rotate less in the power lever 3 Driven by the stroke, it rotates a circle or even a larger angle without overlapping the gear chain 11, so that the front power gear 9 can also rotate at the same stroke angle as the eccentric wheel 7, and the front power gear 9 has a large outer diameter. The rotation angle is large, so that the power chain 12 stroke connecting the front power gear 9 and the rear power gear 10 is also large, and the stroke of the power chain 12 on the outer diameter of the rear power gear 10 is also larger, so that the rear wheel 2 is rotated for a number of times. increase, so that under the small stroke of power lever 3 also can output bigger power.

When the power lever 3 of the scooter was in the open state as shown in Figure 2, the front foot of the person stepped on the front end stepping point 17. At this moment, the front foot was higher than the rear foot to a certain height. It depends on people's own force to step on it. At this time, the external force given by people is required to be the largest. It can be seen from Fig. 8 that due to the effect of eccentricity, the point A 19 where the eccentric wheel 7 applies pulling force to the sprocket chain 11 in this state is farthest from the axis center of the front power shaft 14, so that the sprocket chain 11 is lowered by the same force. The pulling force applied to the eccentric wheel 7 is converted into a larger torque of the shaft, thereby greatly reducing the maximum force that a person needs to give when stepping on a single step, thereby achieving the purpose of labor saving. With the downward movement of the power lever 3, the rear foot is slowly raised, and the center of gravity moves to the front foot. Among them, the outer diameter of the eccentric wheel 7 is also decreasing, from point A 19 of Fig. 8 to point B 20 of Fig. 9, and finally from point B 20 of Fig. 9 to point C 21 of Fig. 10, due to the outer diameter The reduction of the eccentric wheel 7 under the same stroke of the sprocket 6 also increases the rotation angle of the eccentric wheel 7. Such a stroke angle is transmitted to the one-way flywheel 8 through the front power shaft 14, so that it rotates more angularly during a single stroke. More, the more strokes of power output, so as to achieve several times the speed change effect.

Although in the process from opening to closing of the power lever 3, due to the reduction of the outer diameter of the eccentric wheel 7, the speed becomes faster and the strength increases, but the whole stepping method can move the center of gravity forward and backward by adjusting the different heights of the front and rear feet. When the force behind is increased, it can be provided by its own gravitational potential energy completely, and three-stage speed change of low, medium and high can be formed.

As shown in Fig. 11, Fig. 13, and Fig. 15, the travel position of the eccentric wheel 7 of the power lever 3 in the low-speed, medium-speed, and high-speed stepping methods can be seen; as shown in Fig. 12, Fig. 14 and Fig. 16, the eccentric Wheel 7 is respectively in the travel position of eccentric wheel 7 in low speed, middle speed, high speed stepping method.

In the low-speed pedaling method, the sprocket 6 drives the eccentric wheel 7 to rotate back and forth in the stroke as shown in Figure 12 through the sprocket chain 11, and through fast stepping, the stress points of the sprocket chain 11 and the eccentric wheel 7 reciprocate on the eccentric wheel 7. The outer diameter moves between point A 19 and point B 20, and the stress points before point A 19 and point B 20 are all far away from the power shaft 14 before turning. Under the forward resistance, the torsion force required by the gear chain 11 to rotate the front power shaft 14 through the eccentric wheel 7 will be smaller, thereby greatly reducing the power that the person himself needs to provide, and reaching labor saving. However, in this process, the action point of the eccentric wheel 7 is on a larger outer diameter, which will reduce the output speed. Therefore, the low-speed pedaling method can make the car output a greater speed at a slow speed under the same force. Powerful, suitable for climbing.

In the medium-speed pedaling method, the force point of the eccentric wheel 7 moves on the periphery of the entire tooth, that is, between point A 19 and point C 21, as shown in Figure 14. When stepping on a single step, the starting force is light and the speed is slow. will speed up. During the whole process, people can clearly feel the changes in strength and speed, the speed changes smoothly, and the speed is in a moderate state.

In the high-speed pedaling method, as shown in Figure 16, the stress point of the eccentric wheel 7 reciprocates and moves before point B 20 and point C 21, and the stress point is close to the axis center of the front power shaft 14, and the point of action of the eccentric wheel 7 is outside If the diameter is small, the output speed will obviously increase. Although the rear wheel 2 is subject to the same forward resistance, the torque required by the tooth chain 11 to rotate the front power shaft 14 through the eccentric wheel 7 will also be large, but we can rely on such force It is provided by its own gravity plus pedaling force, so the car can reach the best speed in this process.

The power fixed piece 5 of vehicle body support is provided with smooth roller 22, and smooth roller 22 is adjacent to rear power gear 10. As shown in Fig. 2, the smooth idler wheel 22 can be close to the power chain 12 arranged at the rear power gear 10, so that the power chain 12 will not skip the chain during transmission.

The power fixed piece 5 of the body bracket is provided with a power guide wheel 23, and the power guide wheel 23 is located between the chain tooth plate 6 and the eccentric wheel 7 and forms a certain angle with the chain tooth plate 6 and the eccentric wheel 7, as shown in Figure 17 , by adding a power guide wheel 23 between the sprocket 6 and the eccentric wheel 7, thereby increasing the stroke of the sprocket chain 11.

In the prior art, return systems with various structures are used. This embodiment adopts the return system shown in Figure 2 and Figure 17. The return system includes a return gear 24, a return chain 26, and a return guide wheel 27. And the return fixed column 25, the return gear 24 is sleeved on the front power shaft 14, the return fixed column 25 is arranged on the power lever 3, the return fixed column 25 is connected to the return gear 24 by the return chain 26, and the return guide The wheel 27 is fixed on the power fixing piece 5 and forms a certain angle with the return fixed column 25 and the return gear 24, thereby increasing the stroke of the return chain 26. When stepping on the rear end stepping point 18 of the power lever 3 downwards, the return fixed column 25 on the power lever 3 can rotate clockwise with the return gear 24 by the return chain 26, and the front power rotating shaft 14 rotates clockwise. Wheel 7 and front power gear 9 are also fixed on front power rotating shaft 14, so eccentric wheel 7, one-way flywheel 8 and front power gear 9 also rotate clockwise with it, power system returns, and one-way flywheel 8 rotates clockwise, without PTO.

The power output of the present invention makes full use of the lever principle, and the pedaling method is designed in imitation of the habit that the center of gravity of a person is in a straight line with the front and rear feet when walking, so that the pedaling feeling is closer to the ease and freedom of a person walking. As shown in Figure 2, the front and rear feet are respectively placed on the front end stepping point 17 and the rear end stepping point 18 when people are stepping on, and the power lever 3 is wound around the power shaft 13 to rotate back and forth as the person's center of gravity alternately shifts the front and rear feet. Thereby the sprocket 6 and the return fixed column 25 fixed on the power lever 3 also rotate back and forth at a fixed angle thereupon, specifically as follows: the sprocket 6 drives the eccentric wheel 7 through the sprocket chain 11, and the return fixed column 25 The return gear 24 is driven by the return chain 26 through the return guide wheel 27, and the eccentric wheel 7 and the return gear 24 are fixed on the front power shaft 14 at the same time, so that under the rotation of the power lever 3, the sprocket 6 is driven to the eccentric Wheel 7, return fixed post 25-return gear 24, these two systems alternate back and forth, so that the front power shaft 14 also rotates back and forth at a fixed angle, which makes the front power gear 9 arranged on the front power shaft 14 pass power through the power chain 12 passes to rear power gear, thus drives rear wheel 2 motions.

Example 2.

The difference between this embodiment and Embodiment 1 is that this embodiment adopts a return system of another structure, the return system includes a return gear 24 and a return spring 28, and the return gear 24 is sleeved on the front One end of the power shaft 14 and the return spring 28 are fixed to the main bracket 4 , and the other end of the return spring 28 is connected to the return gear 24 through the return chain 26 . As shown in Figure 18, when the power lever 3 is in the open state, the return spring 28 is in the pre-tensioned state, and when the front end stepping point 17 of the power lever 3 is stepped on downward, the sprocket 6 moves upwards, passing through the sprocket chain 11 Pull the eccentric wheel 7 to rotate counterclockwise. Since both the eccentric wheel 7 and the return gear 24 fix the front power shaft 14, the return gear 24 also rotates counterclockwise with it, thereby pulling the return chain 26 to make the return spring 28 Pull away and be in tension state, when stepping on the rear end stepping point 18 of power lever 3 downwards like this, due to the resetting action of return spring 28, return chain 26 pulls return gear 24 and rotates clockwise, and front power rotating shaft 14 clockwise Clockwise rotation, because the eccentric wheel 7 and the front power gear 9 are fixed on the front power shaft 14, so the eccentric wheel 7, the one-way flywheel 8 and the front power gear 9 also rotate clockwise with it, which makes the whole power system return to its original position, one-way Flywheel 8 rotates clockwise, without power output.

Example 3.

As shown in Figure 19 and Figure 20, this structure is one of the structures of dual power output. The number of drive systems in this embodiment is two, and the number of power levers 3 is two. The two drive systems are respectively arranged on the left side of the body bracket. Side and right side, the driving system on the left side is connected to the power lever 3 on the left side, and the driving system on the right side is connected to the power lever 3 on the right side. In this embodiment, the power lever 3 on the left side and the power lever 3 on the right side rotate alternately around the power shaft 13 at the same time, and only two feet need to be placed on the front end stepping point 17 of the power lever 3 on the left side and on the right side respectively. Stepping on the front end stepping point 17 of the power lever 3 of the power lever 3 on the left side and the power lever 3 on the right side move up and down, so that the left and right power systems are in the position of return and power output respectively. Alternately in each state.

This embodiment does not have a return system, and the power system on the right side of this embodiment is the same as that of Embodiment 1, as shown in FIG. 19 . The power system on the left side is shown in Figure 20, the eccentric wheel 7 on the left side and the eccentric wheel 7 on the right side are fixed on the front power rotating shaft 14 at the same time, and make the chain evacuation end 16 on the left side and the chain evasion position on the right side The opening of the end 16 faces oppositely, and the one-way flywheel 8 of the power system on the left side and the one-way flywheel 8 of the power system on the right side are fixed on the front power shaft 14 at the same time, but the one-way flywheel 8 on the left side is idling when it turns counterclockwise. Turn clockwise for power output. The power system on the left is provided with a rear guide wheel 29, and the front power gear 9 on the left is connected to the rear guide wheel 29 on the left through the power chain 12 on the left, and the rear power gear 10 on the left is located in the power chain on the left. 12 outside the formed loop and next to the power chain 12 on the left side, the rear power gear 10 on the left side is driven by the motion of the power chain 12 on the left side to rotate, and the rear guide wheel 29 on the left side acts as a reversing wheel. The rear power gear 10 on the left side is opposite to the front power gear 9 on the left side in the direction of rotation.

When stepping down on the front end stepping point 17 of the power lever 3 on the right side, the gear chain 11 on the right side drives the eccentric wheel 7 on the right side to rotate counterclockwise, and the eccentric wheel 7 on the right side drives the front power rotating shaft 14 to rotate counterclockwise. When the front power shaft 14 rotates counterclockwise, the one-way flywheel 8 on the left side rotates counterclockwise to be idling, and there is no power output. The eccentric wheel 7 on the left side will also rotate counterclockwise with the front power shaft 14. When the hour hand rotates, the gear chain 11 on the left side is rolled up, so that the power lever 3 on the left side is pulled and rises back to its original position. The one-way flywheel 8 on the right rotates counterclockwise for power output, the one-way flywheel 8 on the right drives the front power gear 9 on the right to rotate counterclockwise, and the front power gear 9 on the right drives the right side through the power chain 12 on the right The rear power gear 10 rotates counterclockwise, and then the rear power shaft 15 also rotates counterclockwise, and the rear wheel 2 rotates counterclockwise to form the power output of the power system on the right side.

In a similar principle, when stepping down on the front end stepping point 17 of the power lever 3 on the left side, the power system on the left side outputs power, and the power system on the right side returns to its original position.

Of course, the left side and the right side of this embodiment can also use independent return systems, that is, return springs 28 are used for the return system as in the second embodiment.

Example 4.

As shown in Figure 21 and Figure 22, this structure is another structure of dual power output, the number of drive systems is two, the number of power lever 3 is one, and the two drive systems are respectively arranged on the left and right sides of the body bracket , the two drive systems are connected to a power lever 3, that is, the only power lever 3 has power output in both movement processes whether it is from closing to opening or from opening to closing.

The reset system on the left side and the reset system on the right side of this embodiment are respectively the same as the reset system in Embodiment 1. The power system on the right side of this embodiment is the same as that of Embodiment 1, as shown in FIG. 21 . As shown in Figure 22, it is the power system on the left side, the one-way flywheel 8 of the power system on the left side and the one-way flywheel 8 of the power system on the right side are fixed on the front power shaft 14 at the same time, but the one-way flywheel 8 on the left side is counterclockwise It is idling when it turns, and it is power output when it turns clockwise. The power system on the left is provided with a rear guide wheel 29, and the front power gear 9 on the left is connected to the rear guide wheel 29 on the left through the power chain 12 on the left, and the rear power gear 10 on the left is located in the power chain on the left. 12 outside the formed loop and next to the power chain 12 on the left side, the rear power gear 10 on the left side is driven by the motion of the power chain 12 on the left side to rotate, and the rear guide wheel 29 on the left side acts as a reversing wheel. The rear power gear 10 on the left side is opposite to the front power gear 9 on the left side in the direction of rotation.

When the rear end stepping point 18 of the power lever 3 is stepped on downward, the return fixed column 25 on the left side drives the front power rotating shaft 14 to rotate clockwise through the return chain 26 on the left side, and the return fixed column 25 on the right side passes through The return chain 26 on the right side drives the front power rotating shaft 14 to rotate clockwise, and when the front power rotating shaft 14 rotates clockwise, the one-way flywheel 8 on the right side rotates clockwise to be idling, and then the power system on the right side has no power output, and The one-way flywheel 8 on the left side rotates clockwise to be the power output, and the one-way flywheel 8 on the left side drives the front power gear 9 to rotate, so that the power is transmitted to the rear guide wheel 29 on the left side through the power chain 12 on the left side, because the left side The front power gear 9 on the side and the rear guide wheel 29 on the left side are in the inner side of the power chain 12 on the left side, and rotate clockwise in the same direction when rotating, and the rear power gear 10 on the left side on the rear power rotating shaft 15 is on the left side. The outside of the power chain 12 rotates counterclockwise with the front power gear 9 on the left side and the rear guide wheel 29 on the left side in the opposite direction of rotation, driving the rear wheel 2 to rotate counterclockwise, so that the power system on the left side is powered output, so this structure can also have positive power output when returning to its original position.

When stepping down on the front end stepping point 17 of the power lever 3, the sprocket 6 on the right drives the eccentric wheel 7 on the right and the front power shaft 14 to rotate counterclockwise through the sprocket chain 11 on the right, while the chain on the left The gear plate 6 drives the eccentric wheel 7 on the left side and the front power shaft 14 to rotate counterclockwise through the gear chain 11 on the left side. The power system on the left side has no power output, and the one-way flywheel 8 on the right side rotates counterclockwise to be power output, so that the power system on the right side has power output.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (10)

1. A variable speed scooter, comprising a vehicle body, a front wheel, a rear wheel and a drive system, the vehicle body comprising a power lever and a vehicle body support, the vehicle body support is provided with an upper power rotating shaft, a front power rotating shaft and a rear power rotating shaft, and the power lever Set on the upper power shaft, the drive system includes a power system, characterized in that: the power system includes an eccentric wheel and a gear transmission system, the eccentric wheel is set on the front power shaft, and the front power shaft passes through the The gear transmission system is drivingly connected to the rear power shaft, the power lever is drivingly connected to the eccentric wheel, and the rear wheel is arranged on the rear power shaft. 2. A variable speed scooter according to claim 1, characterized in that: the number of the drive system is one, the number of the power lever is one, and the drive system is arranged on the left side of the body bracket Or on the right side, one of the drive systems is connected to one of the power levers, and the drive system also includes a return system. 3. A variable speed scooter according to claim 1, characterized in that: the number of the drive system is two, the number of the power lever is one, and the two drive systems are respectively arranged on the body On the left and right sides of the bracket, two drive systems are connected to one power lever, and the drive system also includes a return system. 4. A variable speed scooter according to claim 1, characterized in that: the number of the drive system is two, the number of the power lever is two, and the two drive systems are respectively arranged on the The left and right sides of the body frame, the drive system on the left is connected to a power lever, and the drive system on the right is connected to another power lever. 5. A variable speed scooter according to any one of claims 1-4, characterized in that: the power lever is fixed with a sprocket, and the sprocket is provided with a sprocket chain, and the sprocket chain The drive is connected to the eccentric. 6. A variable speed scooter according to claim 5, characterized in that: said eccentric wheel is provided with a chain escape end. 7. A variable speed scooter according to claim 6, characterized in that: the eccentric wheel is provided with an eccentric wheel hook, one end of the sprocket chain is hooked to the eccentric wheel hook, and the sprocket The chain is provided with a hook of the chain tooth, and the other end of the chain of the tooth chain is hooked to the hook of the chain tooth. 8. A variable speed scooter according to any one of claims 1-4, wherein the gear transmission system includes a front power gear, a one-way flywheel, a rear power gear and a power chain, and the front power gear Set on a one-way flywheel, the one-way flywheel is set on the front power shaft, the rear power gear is set on the rear power shaft, and the front power gear is connected to the rear power gear by driving through the power chain . 9. A variable speed scooter according to claim 2 or 3, characterized in that: the return system includes a return gear, a return chain, a return guide wheel and a return fixing column, and the return gear Set on the front power rotating shaft, the return fixing column is set on the power lever, the return gear is connected to the return fixing column through a return chain, and the return guide wheel is fixed on the vehicle body stand. 10. A variable speed scooter according to claim 2, characterized in that: the return system includes a return gear and a return spring, the return gear is arranged on the front power shaft, and the return One end of the spring is fixed to the vehicle body bracket, and the other end of the return spring is connected to the return gear through a return chain.

Images