CN206190839U - Electric vehicle using motor of infinitely variable transmission and applied this device - Google Patents

Abstract

The utility model provides a continuously variable speed transmission device and an electric booster vehicle using the device, which includes a planetary speed changer, and the planetary speed changer includes a sun gear, a planet carrier, a planetary gear, a planetary gear ring and a connecting plate. The beneficial effect of the utility model is that the application can realize the change of the gear position by adjusting the rotation speed of the sun gear. Since the rotation speed is a variable that can change continuously, it can realize stepless speed change. It can make the pedaling feel more stable and smooth during riding, maintain a certain pedaling frequency and pedaling force, and bring a better experience to the rider.

Description

Continuously variable transmission device and electric bicycle using the device

technical field

The utility model relates to the field of electric bicycle accessories, in particular to a continuously variable transmission device and an electric bicycle using the device.

Background technique

In the prior art, there are the following problems in the riding of electric mopeds. Since the speed increases continuously during the pedaling process, the pedaling frequency will increase. When the speed increases to a certain level, empty pedaling will occur. At this time It will bring great discomfort to the cyclist. At the same time, pure electric vehicles have poor endurance due to the full use of battery functions.

Utility model content

The purpose of the utility model is to provide a continuously variable transmission device that can improve riding experience and an electric bicycle using the device.

The technical scheme of the utility model is:

A continuously variable transmission device, including a planetary transmission device, the planetary transmission device includes a sun gear, a planet carrier, a planetary gear, a planetary gear ring and a connecting plate,

The sun gear is hollow along its axis, and the sun gear is rotatably connected with the planet carrier;

At least two planetary gears are arranged on the planet carrier, and the planetary gears mesh with the sun gear;

There is a gap between the connecting plate and the planetary carrier, and a planetary gear ring meshing with the planetary gear is fixedly arranged on the side of the connecting plate close to the planetary carrier;

It also includes a power device for adjusting the rotation speed of the sun gear and a booster device for providing rotational assistance to the planet carrier.

Further, the power device includes a motor, a first gear and a second gear, a first gear is provided at the output end of the motor; a second gear is provided at the end of the sun gear away from the planetary gear;

The first gear meshes with the second gear.

Further, the radius of the first gear is larger than the radius of the second gear.

Further, the power device includes a motor, a first pulley and a second pulley, a first pulley is arranged at the output end of the motor; a second pulley is arranged at the end of the sun gear away from the planetary gear;

The first pulley is connected to the second pulley through a belt.

Further, the radius of the first pulley is greater than the radius of the second pulley.

Further, a detachable chainring is provided on the outer side of the planet carrier; the chainring is used to connect with a chain, and the chain is connected with a booster device. The chainring is used to be connected with a chain, and the chain is connected with a booster.

Further, it also includes a central axis and an elastic member, and the elastic member is provided with a deformation sensing device;

The central shaft passes through the center of the sun gear and passes through the connecting plate; the central shaft is fixedly connected to the connecting plate through the elastic member, and the elastic member is rotationally connected to the sun gear .

Further, a bearing is provided between the central shaft and the sun gear.

Further, it also includes a casing, the power device is arranged inside the casing, the two ends of the central shaft pass through the two sides of the casing respectively, and a A bearing is provided between the sun gear and the housing.

Owing to adopting above-mentioned technical scheme, the present application has the following advantages:

1. In this application, the gear position can be changed by adjusting the rotation speed of the sun gear. Since the rotation speed is a variable that can change continuously, it can realize stepless speed change. It can make the pedaling feel more stable and smooth during riding, maintain a certain pedaling frequency and pedaling force, and bring a better experience to the rider.

2. The power device in this application proposes two optional technical solutions, which have in common that the output end is a high-speed end, and the gear radius is small, or the pulley radius is small; the sun gear end is a low-speed end, and the gear radius is small. Larger, or the pulley radius is larger, the purpose of doing so is to increase the torque and bring more power to the moped.

3. The central shaft and the tooth plate are connected by the elastic body and the connecting plate. When rotating, the elastic body will undergo corresponding deformation, which will be sensed by the deformation sensor attached to the elastic body. Using this signal, you can feel the pedaling Frequency, the size of pedaling force.

4. It also includes a casing, and a bearing is arranged between the casing and the sun gear to reduce resistance and prolong service life. At the same time, the motor is also placed inside the casing to protect the motor.

5. Bearings are installed between the central shaft and the sun gear, and between the central shaft and the outer shell. This arrangement of the car can ensure that the central shaft is evenly stressed and at the same time ensure smooth rotation.

The present application also provides an electric bicycle, including a transmission device, and the transmission device is any one of the continuously variable transmission devices mentioned herein. The bicycle equipped with such a variable speed transmission device can improve the riding experience and reduce the occurrence of empty pedaling.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the speed change part of the present utility model;

Fig. 2 is a schematic diagram of the overall structure of the shifting part of the present utility model;

Fig. 3 is a schematic diagram of the stressed structure of the elastic body of the present utility model;

Fig. 4 is a structural schematic diagram of the whole vehicle of the utility model.

Fig. 5 is a structural schematic diagram of the booster device and the transmission device of the present invention.

In the picture:

1. Planetary transmission;

1.1, sun gear, 1.2 planetary carrier, 1.3, planetary gear ring, 1.4, connecting plate; 1.5, planetary gear;

2. Power device;

2.1. Motor;

2.11, the first gear; 2.12, the second gear; 2.13, the chain;

3. Tooth plate;

4. Central axis;

5. Elastic parts;

6. Deformation sensor;

7. Bearing;

8. Shell;

9. Frame;

10. Power assist device.

detailed description

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the utility model Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of The technical content disclosed by the utility model must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for convenience of description, and are not used to limit the implementation of the present utility model. The change or adjustment of its relative relationship, without substantive changes in the technical content, should also be regarded as the scope of the utility model that can be implemented.

As shown in Figure 1, the utility model provides

A continuously variable transmission device, including a planetary transmission device, the planetary transmission device includes a sun gear 1.1, a planetary carrier 1.2, a planetary gear 1.5, a planetary gear ring 1.3 and a connecting plate 1.4,

The sun gear 1.1 is hollow along its axial direction, and the sun gear 1.1 is rotationally connected with the planet carrier 1.2;

The planet carrier 1.2 is provided with at least two planetary gears 1.5, and the planetary gears 1.5 mesh with the sun gear 1.1;

There is a gap between the connecting plate 1.4 and the planetary carrier 1.2, and a planetary gear ring 1.3 meshing with the planetary gear 1.5 is fixedly arranged on the side of the connecting plate 1.4 close to the planetary carrier 1.2;

In this application, the principle of a planetary transmission is applied, the input end of which is the connection plate 1.4, and the output end is the planet carrier 1.2, and the speed ratio between the output end and the input end is controlled by changing the speed of the sun gear 1.1. The specific formula is as follows,

Calculated from the speed ratio of planetary gear 1.5:

Since the connecting plate 1.4 and the planetary carrier 1.2 are not in a fixed relationship, the two can rotate relatively around the central axis 4, and the connecting plate 1.4 is also provided with a planetary gear ring 1.3. When the planetary gear ring 1.3 and the sun gear 1.1 When rotating, the planetary carrier 1.2 also rotates under the action of the planetary gear 1.5. It can be known from the above formula that the rotational speed of the planetary carrier 1.2 will increase compared with the speed of the planetary gear ring 1.3.

It also includes a power device for adjusting the speed of the sun gear 1.1. This device is used to control the speed of the sun gear 1.1. According to the above formula, when the speed of the planetary gear ring 1.3 is constant and the speed ratio is constant, when the speed of the sun gear 1.1 increases , the speed of the planetary gear ring 1.3 and the speed of the planet carrier 1.2 increase accordingly;

At the same time, in order to solve the problem of reducing riding resistance, we are also equipped with a booster device 10 for providing rotation boost to the planet carrier;

The function of the booster device 10 is that when the gear is increased, people feel strenuous when stepping on it. At this time, it can provide booster to reduce the difficulty of riding.

The power unit can be implemented in the following two ways:

(1) Gear transmission:

The power device includes a motor 2.1, a first gear 2.11 and a second gear 2.12, the output end of the motor 2.1 is provided with a first gear 2.11; the end of the sun gear 1.1 away from the planetary gear 1.5 is provided with a second gear Second gear 2.12;

The first gear 2.11 meshes with the second gear 2.12.

At the same time, in order to obtain greater torque, the radius of the first gear 2.11 is greater than the radius of the second gear 2.12.

(2) Pulley drive:

The power device includes a motor 2.1, a first pulley and a second pulley, the output end of the motor 2.1 is provided with a first pulley; the end of the sun gear 1.1 away from the planetary gear 1.5 is provided with a second pulley;

The first pulley is connected to the second pulley through a belt.

At the same time, in order to obtain greater torque, the radius of the first pulley is larger than the radius of the second pulley. Because the pulley technology is relatively simple, it is not shown in the figure.

At this time, the booster device 10 should include a booster motor and an output end, and this output end is connected with the chain 2.13 on the crankset to provide power assistance for riding when needed.

In order to better apply this device to bicycles, we make the following improvements. The outer side of the planet carrier 1.2 is provided with a detachable chainring 3; the chainring 3 can be fixed to the The outer circumference of the planet carrier 1.2. The chainring 3 is used to connect with the chain 2.13, which is connected with the booster device 10 in turn.

On the basis of the above technical solution, we have also added the following components to this device, the device also includes a central axis 4 and an elastic member 5, and the elastic member 5 is provided with a deformation sensing device;

The central shaft 4 passes through the center of the sun gear 1.1 and passes through the connecting plate 1.4; the central shaft 4 is fixedly connected to the connecting plate 1.4 through the elastic member 5, and the elastic member 5 is connected to the connecting plate 1.4. Rotation connection between the sun gear 1.1.

As shown in Figure 3, wherein the central shaft 4 is fixedly connected with the center of the connecting plate 1.4 through the elastic member 5, and the outer edge of the connecting plate 1.4 is fixedly provided with a tooth plate 3; Power is applied to the axle, but at this time the chain 2.13 exerts resistance on the chainring 3, and the reverse of the power and resistance produces a torque, which causes the deformation of the elastic member 5, and the deformation sensor 6 provided on the elastic member 5 (Because this deformation sensor 6 is a frivolous patch, this patch is attached on the surface of the elastic body, is difficult to represent in the figure, so not shown in the figure), this deformation is captured again, this The magnitude of the deformation signal reflects the magnitude of the torque value, so this signal can be used to control the planetary transmission. When the deformation signal becomes larger, the speed of the sun gear is reduced by 1.1, the gear is lowered, and the torque output is increased; when the deformation signal becomes smaller, the torque output is increased. The speed of the sun gear is 1.1, and the gear is increased to increase the output of the speed. At the same time, it can also provide a reference for the output of the booster motor according to the magnitude of the signal.

A bearing 7 is arranged between the central shaft 4 and the sun gear 1.1.

As shown in Figure 2, the device also includes a casing 8, the power unit is arranged inside the casing 8, the two ends of the central axis 4 pass through the two sides of the casing 8 respectively, between the casing 8 and A bearing 7 is provided between the right parts of the central shaft 4 , and a bearing 7 is provided between the sun gear 1 . 1 and the housing 8 .

Between the right side of the central shaft 4 and the sun gear 1.1, and between the left side of the central shaft 4 and the housing 8, a bearing 7 is arranged. The function of the bearing 7 here is not only to make the rotation smoother, but also to Strengthen the role of the strength of the central axis 4.

This application also proposes an electric bicycle, including a speed change device, and the speed change device is the continuously variable transmission device proposed in this application.

As shown in Figure 4 (the pedals and the crank on both sides of the central axis 4 are not shown in the figure), when this device is assembled on the electric bicycle, this part is assembled on the bottom of the vehicle frame 9 of the bicycle, and when the pedal is stepped on, the crank will The torque is transmitted to the center shaft 4. Since the center shaft 4 is connected to the chain plate 3 through the elastic member 5, the chain 2.13 on the chain plate 3 produces a resistance effect at this time. Since the resistance effect is opposite to the power effect on the pedal, it is The elastic member 5 is deformed. At this time, the deformation signal is sensed by the deformation sensor 6 attached to the body of the elastic member 5. The deformation sensor 6 then transmits the signal to the controller, and then transmits the signal to the driver through the controller. Finally, the rotation speed of the sun gear 1.1 changes; when the rotation speed of the sun gear 1.1 changes, the rotation speed of the planetary carrier 1.2 will change, and then the rotation speed of the crankshaft 3 connected to the planetary carrier 1.2 will change accordingly, which is equivalent to a speed change The manual transmission on the bicycle is adjusted, and the specific correspondence is as follows:

(1) The speed of the sun gear 1.1 increases, which is equivalent to an upshift;

(2) The speed of the sun gear 1.1 is reduced or reversed, which is equivalent to a downshift.

Compared with the existing shifting method, this shifting method has the following advantages. Due to the obvious gear levels of the existing shifting method, there will be a sense of frustration during the shifting process. This shifting method is adjusted by the change of the speed, and the shifting is continuous. No polarization, yes the shifting is smooth and smooth.

When the gear is raised, it will make stepping more strenuous. At this time, the power booster 10 starts to work. The power booster 10 is a motor that can output power to the gear or pulley, and the power is output to the chain 2.13 or the belt to provide riding. power.

An embodiment of the present utility model has been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (10)

1. A continuously variable transmission, comprising a planetary transmission, characterized in that: said planetary transmission comprises a sun gear, a planet carrier, a planetary gear, a planetary gear ring and a connecting plate, The sun gear is hollow along its axis, and the sun gear is rotatably connected with the planet carrier; At least two planetary gears are arranged on the planet carrier, and the planetary gears mesh with the sun gear; There is a gap between the connecting plate and the planetary carrier, and a planetary gear ring meshing with the planetary gear is fixedly arranged on the side of the connecting plate close to the planetary carrier; It also includes a power device for adjusting the rotation speed of the sun gear and a booster device for providing rotational assistance to the planet carrier. 2. The continuously variable transmission device according to claim 1, characterized in that: the power device includes a motor, a first gear and a second gear, and the output end of the motor is provided with the first gear; The end of the sun gear away from the planetary gear is provided with the second gear; The first gear meshes with the second gear. 3. The continuously variable transmission device according to claim 2, wherein the radius of the first gear is greater than the radius of the second gear. 4. The continuously variable transmission device according to claim 1, characterized in that: the power unit includes a motor, a first pulley and a second pulley, and the output end of the motor is provided with a first pulley; The end of the sun gear away from the planetary gear is provided with a second pulley; The first pulley is connected to the second pulley through a belt. 5. The continuously variable transmission device according to claim 4, characterized in that: the radius of the first pulley is greater than the radius of the second pulley. 6. The continuously variable transmission device according to claim 3 or 5, characterized in that: the outer side of the planet carrier is provided with a detachable chainring; The chainring is used to be connected with a chain, and the chain is connected with a booster. 7. The continuously variable transmission device according to claim 6, characterized in that it further comprises a central shaft and an elastic member, and the elastic member is provided with a deformation sensing device; The central shaft passes through the center of the sun gear and passes through the connecting plate; the central shaft is fixedly connected to the connecting plate through the elastic member, and the elastic member is rotationally connected to the sun gear . 8. The continuously variable transmission device according to claim 7, characterized in that: a bearing is arranged between the central shaft and the sun gear. 9. The continuously variable transmission device according to claim 8, characterized in that it further comprises a casing, the power device is arranged inside the casing, and the two ends of the central shaft pass through both sides of the casing respectively , a bearing is provided between the housing and the right part of the central shaft, and a bearing is provided between the sun gear and the housing. 10. An electric bicycle, comprising a continuously variable transmission device, characterized in that: the continuously variable transmission device is any one of the continuously variable transmission devices in claims 1-9.