KR100799542B1 - Semi spherical continuously variable transsmision - Google Patents

Abstract

A semi-spherical continuously variable transmission is provided to reduce a shifting impact and a shifting noise by variably point-contacting a semi-spherical member with a disk. A semi-spherical continuously variable transmission for a vehicle includes a disk(22), a semi-spherical member(18), and an eccentric support member(40). The disk is implemented on a wheel shaft of a driving wheel. The semi-spherical member is contacted with an eccentric position, which is apart from a center of the disk. The semi-spherical member is rotated by a driving input member. The eccentric support member includes a roller, which is contacted with a contact point opposing the semi-spherical member. The roller(45) applies an application pressure on the semi-spherical member. A speed adjusting unit is arranged to adjust an angle of the semi-spherical member at one side of the driving input member.

Description

Semi-Spherical Continuously Variable Transsmision

The present invention relates to a continuously variable transmission that can be applied to various driving means such as bicycles, motorcycles, rear cars, spinning wheels, motors, and the like.

The hemispherical continuously variable transmission module is a device to minimize, lighten and modularize to utilize the proven efficiency of existing CVT (continuously variable transmission) to the maximum and to apply it to light load transportation methods such as bicycles and electric scooters. .

The power transmission mechanism is a metal belt pulley continuously variable mechanism using friction between metal belts and pulleys according to the power transmission medium, a traction drive using EHL phenomenon due to fluid viscosity, and a hydro-static continuously variable mechanism using variable displacement pump and motor. And the like. Unlike the existing manual and automatic transmissions, these continuously variable transmissions utilize mechanical characteristics that can realize infinitely large speed ratios in order to optimize power generation factors such as engines according to the output shaft conditions required by the driver. It can be operated to increase the efficiency of power transmission system, and there is no shift shock in the stepped transmission.

The continuously variable transmission is aimed at power transmission of at least 50 horsepower, which results in a complex structure and considerable volume and weight. The present invention intends to increase the efficiency of power utilization by applying to the vehicle for light load by modularizing, lightweighting, minimizing such a continuously variable transmission system.

An example of the prior art proposed for a bicycle as a light load vehicle is as follows.

11 is a view showing the main configuration of the Korean Patent Registration No. 10-0694878 'bicycle electric continuously variable speed transmission for bicycle', the main configuration is provided with a durable curved surface concave along the edge of one side and on the bicycle pedal A driving rotor into which the power generated by the input is input, has a concave curved inner surface along the edge of one side, and a driven rotor coupled with the rear wheel of the bicycle to output power for the rear wheel to rotate, and has a convex curved outer surface. It is installed so that the outer surface is in contact with the inner surface of the driving rotor and the inner surface of the driven rotor, respectively, and the counter rotor for transmitting the rotational force transmitted from the driving rotor to the driven rotor, and changes the angle of the rotation axis of the counter rotor to drive from the rotating shaft of the counter rotor As the axis of rotation of the counter rotor with respect to the distance to the first contact point where the rotor and the counter rotor come into contact Variable means for varying the ratio of the distance between the rotor driven rotor and the second contact point contacting the counter rotor, respectively installed on the input shaft and the output side around the counter rotor, the drive rotor in proportion to the rotational force input to the drive rotor And pressurizes the inner surface of the driven rotor toward the counter rotor while pressing the inner surface of the driven rotor toward the counter rotor in proportion to the rotational force input to the driven rotor.

The continuously variable transmission adopts an advantageous inner-to-surface contact power transmission method, which is advantageous compared to the conventionally available trolley continuously variable transmission using a variable pulley belt friction type, to achieve a simple and reliable transmission. However, since the number of parts, the structure is complex, and the processing precision must be very high to apply to a lightweight bicycle, there is a limit to the practical use because the manufacturing cost is expensive.

As another conventional technology, FIG. 12 shows a main configuration of the Korean Patent No. 10-0351434, 'Bicycle-free Speed Change Device for Bicycles', wherein the bike is continuously shifted by a rotating plate and a spherical body without a chain and sprocket mechanism, which is a driving mechanism of the bike. To provide a continuously variable transmission. Its structure consists of a pressure plate which is installed in the housing of the continuously variable transmission so that a pair of spherical bodies driven by a drive gear and a bevel gear of each spherical body is supported by a bearing of a worm gear shaft and pressurizes the spherical bodies on both sides of the spherical body. The output plate output by the rolling motion of the spherical body is installed on the opposite axis, and the spherical body is contacted at the eccentric position of the pressure plate and the output plate, and the pinion is connected to the large gear of the pressure plate and the large gear of the output plate. It is connected to, and the driving force of the pedal is to be output to the shaft by the output plate is rotated by the rolling motion of the spherical body.

Such a continuously variable transmission for a bicycle has a structure in which the variable speed of the spherical body and the rotating plate is continuously changed by the change of the spherical component in the radius of the spherical body, which is relatively simple among the various continuously variable speed devices. Although it can be seen, such a structure also has two or more spherical body and pressure plate is used because there is a limit to the bulky and light weight difficult to use in a relatively lightweight bicycle.

Moreover, the prior arts are designed such that the axis of the pressure plate for increasing the frictional force is centered, and the continuously variable transmission must be positioned at the eccentricity of the pressure plate and the output plate, so that the shift is possible, and at least two spherical bodies must be used. Due to the drawbacks, there is no limit to the miniaturization and light weight of the volume.

Therefore, the present invention is characterized by using only one hemispherical body and one eccentric support positioned eccentrically from the central axis of the output plate for modularization, light weight, and minimization of the continuously variable transmission.

The present invention for solving the above-mentioned problems is simple in structure, low in volume and weight, reduced in production cost, as well as to reduce the impact and noise during shifting, and to maintain a low cost of maintenance, as in the prior art, Instead of two or more spherical bodies, an eccentric support equipped with a roller supporting the pressing force of the hemispherical body at the contact point of the hemispherical body instead of the pressure plate is installed so that the angular drive such as a bicycle, a motorcycle, an automatic rear car, a spinning wheel, etc. It is an object of the present invention to provide a continuously variable transmission that can be applied to the means without complicated design changes.

As a means for solving the above problems, the present invention is a disk-shaped disk 22 provided on the wheel shaft 21 of the drive wheel portion 20, the drive input means 10 in contact with the eccentric position at the center of the disk 22 And an eccentric support 40 mounted with a hemispherical body 18 that is rotatable by a roller and a roller 45 that supports the pressing force of the hemispherical body in contact with the contact opposing position of the hemispherical body 18. do.

At this time, the one side of the drive input means 10 is characterized in that the shift adjusting port 16 for adjusting the angle of the hemispherical body 18 is provided.

According to the continuously variable transmission according to the present invention, the structure is very simple compared to the existing continuously variable transmission, thereby reducing the production cost, and there is no impact and noise when shifting due to the variable point contact between the hemispherical body and the disk, minimizing weight and volume. Since it is possible to shift by modularization and simple control, it can be applied to angular driving means such as bicycles, motorcycles, electric wagons, wheels, etc., of course, the structure is stable, so there is almost no failure and low cost of maintenance.

Hereinafter, with reference to the accompanying Figures 1 to 10 will be described in detail a preferred embodiment of the present invention.

Figure 1 is a plan view showing the main configuration of the continuously variable transmission according to the present invention, Figure 1a is a key configuration in terms of principles of the present invention, Figure 1b is a view showing a key configuration in terms of configuration.

As shown in Figs. 1A and 1B, the core configuration of the present invention is a disk-shaped disk 22 provided on the wheel shaft 21 of the drive wheel portion 20 and an eccentricity at the center of the disk 22. The hemispherical body 18 which is in contact with the position and is rotatable by the drive input means 10, and the roller 45 which supports the pressing force of the hemispherical body in contact with the contact opposing position of the hemispherical body 18 are attached. Characterized in that it comprises a core support (40).

Specific embodiments of each of these components will be described in detail with reference to FIGS. 2 to 10, but examples of the drawings to be described below are merely examples for helping the understanding of the above-described core configuration of the present invention and are intended to limit the present invention. It is not.

Figure 2 is an exploded perspective view showing a continuously variable transmission structure according to an embodiment of the present invention, Figure 3 is an assembled perspective view showing a continuously variable transmission structure according to an embodiment of the present invention.

Drive input means 10 of the simplified, lightweight and modular continuously variable transmission according to the present invention, as shown in Figures 1 to 3, the input side gear 11 provided on the outer side of the case 19, A semi-spherical body 18 having an arc having an opposite surface of the input side gear 11 and a shift control mechanism 16 fixed to an upper portion of the vertical shaft 15 formed through the upper and lower ends of the case 19, respectively. It is configured to include.

In addition, the ring gear 13 is horizontally installed on the outer circumference of the vertical shaft 15 located inside the case 19, and thus the shift adjusting opening 16 is disposed on the upper surface of the case 19.

The ring gear 13 is coupled to the driving pinion 12 provided on the shaft of the input side gear 11 and the driven pinion 14 provided on the shaft of the hemispherical body 18 in the form of bevel gears, respectively. When the drive pinion 12 rotates, the ring gear 13 rotates in conjunction with each other, and the driven pinion 14 rotates due to the rotation of the ring gear 13.

At this time, when the vertical axis 15 is rotated by a predetermined angle, the driven pinion 14 installed in a direction perpendicular to the vertical axis 15 is rotated along the circumferential gear surface of the ring gear 13 to the vertical axis ( 15) and a fixed bar 17 having a 'c' shape as shown to support each axis of the driven pinion 14 may be installed.

Here, the input side gear 11 is a driving force of the light transportation means or the driving means is input, for example, an engine (not shown) and a chain or belt driven by the combustion of a pedal shaft (not shown) of the bicycle or a motor or gasoline, etc. Alternatively, the input gear 11 of the present invention may be connected to an intermediate means of power transmission such as a gear, so that the input gear 11 of the present invention is not limited in structure as long as it is connected to rotate in conjunction with driving of a pedal or a motor engine.

In addition, the shift control unit 16 is connected to the adjustment means for adjusting the continuously variable shift, for example, the shift lever of the bicycle may be connected via a wire.

Figure 4 is an observation perspective view showing a state in which the continuously variable transmission according to the present invention is applied to a bicycle, Figure 5 is another observation perspective view showing a state in which the continuously variable transmission according to the present invention is applied to a bicycle, Figure 6 is The stepless speed changer according to the state is applied to the bicycle is a plan view.

4 to 6, for example, when the drive input means 10 of the continuously variable transmission according to the present invention is applied to a bicycle, the rear axis of the bicycle, that is, the central axis of the driving wheel part 20, Both ends of the wheel axle 21 are connected to the front axle of the bicycle and at the same time a support frame 30 for supporting a bicycle shape is connected, and a disk-shaped disc 22 is installed at the center of the wheel axle 21. The outer side of the 22 is provided with a wheel 23 in contact with the ground.

In this case, as shown in FIG. 6, the driving input means 10 is fixedly installed on one side of the support frame 30 at an eccentric position with respect to the wheel shaft 21, which is the central axis of the driving wheel portion 20, and the input gear 11 is A chain (not shown) connected to the pedal shaft (not shown) may be wound to input power by pedal driving, and the outer circumferential surface of the hemispherical body 18 is in point contact at an eccentric position in the central axis of the disk 22. To be fixed.

In such a configuration, it is preferable that an eccentric support 40 which reacts to support the pressing force of the hemispherical body 18 is provided at the other position of the disk 22 corresponding to the contact position of the hemispherical body 18.

That is, the contact force of the hemispherical body 18 in contact with the disk 22 may cause problems such as bending or twisting of the disk 22 under eccentric stress with respect to the wheel shaft 21. The eccentric support 40 which counteracts the contact force of the hemispherical body 18 to cancel the eccentric stress on the opposite side of the c) is required.

More preferably, in order to minimize the frictional force that inhibits rotation of the disk 22 when the eccentric support 40 is in contact with the disk 22, the roller 45 is placed in contact with the disk 22. In addition, the roller 45 is supported by the elastic force by the elastic means.

To this end, the eccentric support 40 includes a fixed plate 41, one end of which is fixed to the other support frame 30 located on an opposite surface of the one support frame 30 on which the drive input means 10 is mounted. The roller shaft 44, which is a rotational axis of the roller 45, is installed on the movable plate 43 spaced apart from the fixed plate 41 by a predetermined distance. The coil plate 44 is formed between the fixed plate 41 and the movable plate 43. A spring 42 is interposed so that the roller 45 contacts with the surface of the disk 22 and is supported by an elastic force.

7 is a view showing a state in which the rotation of the bicycle by the continuously variable transmission according to the present invention showing the rotation stop state of the disk, Figure 8 is a use state diagram in which the shifting of the bicycle by the continuously variable transmission according to the present invention. It is a figure which shows the rotational drive state of a disk, and demonstrates the operation | movement of the continuously variable transmission of this invention with reference to FIG. 7 and FIG. 8, and this structure can be further embodied.

As shown in FIG. 7, the driving force input through the input side gear 11 is transmitted through the driving pinion 12, the ring gear 13, and the driven pinion 14 to rotate the hemispherical body 18. In the case where the vertex, which is the central part of (18), is in contact with the disk 22, even if the hemispherical body 18 rotates, the disk 22 does not rotate but stops.

On the contrary, if the user adjusts the shift lever (not shown) while the hemispherical body 18 is being rotated for driving and shifting the bicycle, the shift adjuster 16 rotates at an angle as shown in FIGS. 3 and 8. The vertical shaft 15 fixed to the shift adjusting mechanism 16 rotates at an angle at the same time. At this time, the driven pinion 14 continuously rotates in association with the input side gear 11 and simultaneously starts from the center point of the ring gear 13. The predetermined angle moves, so that each contact point of the hemispherical body 18 and the disk 22 moves outward from the apex of the hemispherical body 18. In this process, the disk 22 is rotated to finally rotate the wheel 21. It rotates.

In this shifting operation, the rotation speed of the disk 22 increases as the contact point of the hemispherical body 18 moves away from the vertex, and since the line contact is made by continuous point contact during shifting, there is no shift shock or vibration, and the disk 22 ) And the fine vibration caused by the rotation of the disk 22 when the hemispherical body 18 comes into contact with the spring 42 elastic force of the eccentric support 40 is also buffered, it is possible to implement a continuously variable transmission with a stable structure.

Furthermore, although not shown, the roller 45 is automatically rotated by the frictional force when the disk 22 rotates, and thus a small generator (not shown) capable of generating power by using the rotational movement of the roller 45. It is also possible to install.

9 is a cross-sectional view of a continuously variable transmission according to another exemplary embodiment of the present invention, that is, a structure capable of developing as a rotational force interlocked with the rotational motion of the roller 45 is shown.

As shown in FIG. 9, the rotating member 52 is in contact with the side surface of the roller 45, the rotating member 52 is connected to the power generating shaft 51, and the power generating shaft 51 is the eccentric support 40. It is connected to the generator 50 installed on the fixed plate 41 of.

The generator 50 is a cylindrical coil and a magnet installed therein to be rotatable therein, in the form of a conventional electromagnet generator.

When the roller 45 rotates in the above structure, the rotating member 52 which is in contact with the roller 45 rotates by frictional force, and this rotational movement generates power of the generator 50 via the power generating shaft 51. This makes it possible to illuminate the headlights (not shown) installed in front of the bicycle, for example.

The shape illustrated in FIG. 9 generally takes the form of a small generator connected to a wheel tire, but the present invention is not limited to the illustrated structure, and the generator 50 may generate power using the rotational force of the roller 45. If so, the rotational transmission structure can be changed or modified in various ways.

10 is a view showing a power transmission structure of the continuously variable transmission according to another embodiment of the present invention, in which the power source of the driving means is directly transmitted to the ring gear 13.

Referring to FIG. 10, in the above-described embodiment, the input gear 11 connected to the driving source of the driving means to transmit the driving force is deleted, and the ring gear 13 interoperates with the connecting gear 60 in place of this. If possible, the connecting shaft 60 of the connecting gear 60 is connected to a driving means, that is, an engine such as a pedal, a motor, an internal combustion engine of the bicycle as illustrated, so that the driving force generated from the driving source of the bicycle is connected to the connecting shaft ( Power can be transmitted by rotating the ring gear 13 via 61 and the connecting gear 60. In this case, unlike the illustrated example, the size of the connection gear 60 may be made smaller in consideration of the angular rotation space of the driven pinion 14.

4 to 10 described above, although the drive input means 10 and the eccentric support 40 of the continuously variable transmission of the present invention are installed in the support frame 30 and the drive wheel part 20 of the bicycle, The driving input means 10 and the eccentric support 40 may be applied to a motorcycle by electric or engine driving, as well as a motorcycle, a rear car or a wagon during electric transmission as a lightweight vehicle, and a spinning wheel as a rotation driving device. As the present invention is not limited to the illustrated structure as described above, the present invention is not limited to the illustrated structure, and various modifications are possible by the above-described technical thoughts, and such modifications can be applied to the following claims of the present invention. It should be understood that it is within the scope of protection.

1 is a plan view showing the main configuration of the continuously variable transmission according to the present invention, Figure 1a is a key configuration in terms of the principle of the present invention, Figure 1b is a view showing a key configuration in terms of configuration.

Figure 2 is an exploded perspective view showing a continuously variable transmission structure according to an embodiment of the present invention.

Figure 3 is an assembled perspective view showing a continuously variable transmission structure according to an embodiment of the present invention.

Figure 4 is a perspective view showing a state in which the continuously variable transmission according to an embodiment of the present invention is applied to a bicycle.

5 is another perspective view showing a state in which the CVT according to an embodiment of the present invention is applied to a bicycle.

Figure 6 is a plan view of a state in which the continuously variable transmission according to an embodiment of the present invention is applied to a bicycle.

Figure 7 is a state diagram showing the use state in which the shift of the bicycle is made by a continuously variable transmission according to an embodiment of the present invention.

8 is a state diagram showing a driving state in which the shift of the bicycle is made by the continuously variable transmission according to the embodiment of the present invention.

9 is a cross-sectional view of a continuously variable transmission according to another embodiment of the present invention.

10 is a view showing a power transmission structure of the continuously variable transmission according to another embodiment of the present invention.

11 is a plan view showing the main configuration of a conventional frictionless electric continuously variable transmission for a bicycle.

Figure 12 is a plan view showing the main configuration of a continuously variable transmission for a bicycle of the prior art.

<Description of Symbols for Main Parts of Drawings>

10: drive input means 11: sprocket

12: drive pinion 13: ring gear

14: driven pinion 15: vertical axis

18: hemispherical body 20: driving wheel part

21: wheel axle 22: disc

23: wheel 30: support frame

40: eccentric support 41: fixed plate

42: spring 43: moving plate

44: roller shaft 45: roller

50: generator 51: power generation shaft

52: rotating member 60: connecting gear

61: connecting shaft

Claims (5)

In the continuously variable structure of the vehicle, A disk-shaped disk 22 provided on the wheel shaft 21 of the drive wheel portion 20, A hemispherical body 18 in contact with an eccentric position at the center of the disk 22 and rotatable by the drive input means 10; Stepless speed change apparatus, characterized in that consisting of an eccentric support (40) mounted with a roller (45) for supporting the pressing force of the hemispherical body in contact with the contact opposing position of the hemispherical body (18). The method of claim 1, Stepless speed change apparatus, characterized in that the shift control port for adjusting the angle of the hemispherical body (18) on one side of the drive input means (10). The method according to claim 1 or 2, The eccentric support 40 is a continuously variable device, characterized in that supported by the elastic force by the spring (42). The method according to claim 1 or 2, The generator 50 is attached to the eccentric support 40, the generator 50 is characterized in that the power generation (發電) in conjunction with the rotation of the roller (45) continuously variable transmission. The method according to claim 1 or 2, The continuously variable transmission is applied to the bicycle, the drive wheel portion 20 is a continuously variable transmission, characterized in that the driving wheel of the bicycle.

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