KR200249685Y1 - A transmission having no shift with power classifying type - Google Patents

Abstract

The present invention relates to a power-class continuously variable transmission, which provides a continuously variable transmission suitable for a small power device such as a bicycle or a motorcycle by minimizing operating load, light weight, and miniaturization, thereby enabling power injection without power disconnection while driving. It is easy and the shift is possible even in the stationary state.

That is, the present invention is composed of a ring gear (5), a carrier (6) and a sun gear (7), each component is a planetary gear unit (2) that can selectively drive, output and degrees of freedom, and

Cam operation in which the input shaft 21 with the input gear 13 is coupled to the inside of the casing 15 sealed by both side plates 20 and 20 'and the cam mechanism 17 corresponding to each other up and down is axially coupled. The gear group 16 is installed between the gears 22 so that the cam operating gear 22 can be rotated at a high speed, and the tip of each cam mechanism 17 is coupled to the one-way clutch 24 axially installed at the output shaft 23. One end is pin-connected to the rotational hole 25 and the pin 18 is connected to the pin, and each of the pins connecting the cam mechanism 17 and the link 18 is rotated by the operation lever 26, the shift control mechanism 27 ) Is a combination of a second transmission (12) in which a link (19) having one end coupled to the pin (19) to adjust the rotational width of the cam mechanism (17) and the link (18) to determine the rotation ratio of the output shaft (23). Configure it,

The output shaft 23 of the second transmission 12 is different from the component given the degrees of freedom of the planetary gear unit 2, the input shaft 21 of the second transmission 12, and the component given the output of the planetary gear unit 2. The connection between the gears and the chain is configured so that the output of the planetary gear unit 2 can adjust the rotational speed of a given component.

Description

A transmission having no shift with power classifying type}

The present invention relates to a power-class continuously variable transmission, which provides a continuously variable transmission suitable for a small power device such as a bicycle or a motorcycle by minimizing operating load, light weight, and miniaturization, thereby enabling power injection without power loss while driving. It is easy and the shift is possible even in the stationary state.

In general, power class CVT is a planetary gear unit consisting of one set of ring gear, carrier, and sun gear given input, output, and degrees of freedom, and a second gearbox, combined with a PIV (belt continuously variable transmission). It refers to a mechanism for obtaining fine speed control and wide speed ratio.

The PIV combined with the planetary gear unit is a power transmission by the friction force, so in order to obtain the necessary friction force, there is a lot of power loss due to the operating load and the slip due to the components, and the overall structure is complicated and the efficiency is inferior. Therefore, it could not be used for bicycles and small power equipment, and was used only for heavy-duty heavy machinery or industrial machinery.

That is, in the case of the belt-type continuously variable transmission as described above, the belt is coupled to a pair of variable pulleys, and the transmission is made according to the change of the PCD line of the pulley. In order to relatively increase the size of the pulley, this increases the overall size of the transmission, and the interview area of the belt and pulley is widened, so that the operating load increases, which is not suitable for use in small and medium-sized.

On the other hand, the bicycle uses a stepped gearbox that shifts the chain by splicing two or three chain sprockets on the pedals and seven to eight on the rear wheels so that the chain can be moved with the control lever. At the time of changing power supply, power injection is interrupted and the structure of the transmission is complicated, and it is cumbersome and requires some advanced skills because two operation levers are used for shift operation.

In the case of motorcycles, the PIV (belt type continuously variable transmission) using centrifugal force by the RPM of the engine is employed, but as mentioned above, in the case of PIV, there is a lot of power loss due to operating load and slip by parts. Therefore, since the engine speed is unnecessarily increased, the fuel efficiency is reduced, as well as the transmission efficiency is reduced, and the advantages of the continuously variable transmission cannot be fully utilized, and the situation is limited to the small displacement.

Therefore, in the present invention, the planetary gear unit as described above and the second transmission has been proposed to solve the problem that the power classification type CVT with PIV, that is, to reduce the operating load, light weight, miniaturization.

In the present invention, a combination of a second transmission composed of a planetary gear unit and a swing type actuator (also known as a zero-max mechanism) can be used to reduce weight and size, as well as to use a link having a very low operating load to significantly reduce operating load. By doing so, it is possible to inject power without driving while driving, shift operation is easy, and to provide a power classification type continuously variable transmission capable of shifting even in a stationary state, the present invention has been completed with the technical problem of the present invention.

1 is a front view of the preferred coupled state of the bicycle to which the present invention is applied

2 is a cross-sectional configuration of the present invention

Figure 3 is an exploded perspective view of the planetary gear unit extract applied to the present invention

4 is an exploded perspective view of a second transmission extract applied to the present invention

5 is a gear arrangement diagram for showing the operating state of FIG.

Figure 6a, 6b is a link operating state of Figure 4

Figure 7 is a cross-sectional view showing another embodiment of the present invention

Explanation of symbols used in main part of drawing

1: Power classification continuously variable transmission 2: Planetary gear unit

3: drive shaft 4: pedal

5: ring gear 6: carrier

7: sun gear 7a: sprocket

8: carrier fixing plate 9: sliding gear

10 bolt 11 body frame

12: second transmission 13: input gear

14: output gear 15: casing

16: gear group 17: cam mechanism

18,19: link 20,20 ': side plate

21: input shaft 22: cam operating gear

23: output shaft 24: one-way clutch

25: Hoedong-gu 26: Operation lever

27: shift control mechanism 27a: guide ball

The power class type CVT 1 to be provided in the present invention is intended to provide a continuously variable transmission suitable for a small power machine. Hereinafter, the configuration will be described as an example in which the present invention is applied to a bicycle.

1 is a front view of a preferred coupling state of the bicycle to which the present invention is applied, Figure 2 is a cross-sectional configuration of the present invention, Figure 3 shows an exploded perspective view of the planetary gear unit applied to the present invention, Figure 4 is the present invention Figure 2 shows an exploded perspective view of the second transmission extract applied to, Figure 5 shows a gear arrangement for showing the operating state of FIG. 6A and 6B show the link operational state diagram of FIG. 4.

The present invention is composed of a combination of a planetary gear unit 2 and a second transmission (zeromax mechanism) 12 composed of a swing-type actuator for controlling the same,

The planetary gear unit 2 is a ring gear 5 having a degree of freedom in which the internal tooth 5a and the external tooth 5b are formed, and the sun gear 7 integrally formed with at least one carrier 6 and the sprocket 7a. And the sun gear 7 is axially coupled to the drive shaft 3 so as to be connected to the rear wheel and the chain, and the carrier fixing plate 8 on which the pedal 4 is fixed to both sides of each carrier 6 is slid. Position the gear 9 and secure it with the bolt 10.

That is, the drive gear 6 is driven to output the sun gear 7 and the ring gear 5 has a degree of freedom, which is one planetary gear unit 2 to be applied in the present invention. Likewise, the drive, output and degrees of freedom can be arbitrarily selected according to the needs of the user.

Driving Print Degrees of freedom Sun gear Ring gear Carrier Carrier Ring gear Carrier Ring gear Sun gear Sun gear Ring gear Ring gear Carrier Sun gear Sun gear Carrier

And the second transmission (12) composed of a swing-type actuator is fixed to the body frame 11 of the bicycle and the outer gear (5b) formed in the ring gear (5) of the planetary gear unit (2) and each carrier (6) ) Is provided with an input gear 13 and an output gear 14 to which the sliding gear 9 coupled to each other is toothed, and the gear group 16 and the cam mechanism 17 and several links are provided inside the casing 15. (18) (19) or the like,

4, 5, 6a, and 6b in more detail look at the second transmission (12) applied to the present invention, which is input into the casing (15) that is sealed by both side plates (20, 20 ') The gear group 16 is coupled to the gear configured to be coupled on the input shaft 21 to which the gear 13 is coupled so that the cam operating gear 22 fixed on both side plates 20 and 20 'can be rotated at a high speed. And the cam mechanisms 17 corresponding to each other above and below the cam operating gear 22 are axially coupled so that the rotational movement is converted into a linear movement, and the one end interposed on the output shaft 23 at the tip of each cam mechanism 17. It is pin-connected with the other end of the two links 18, one end of which is pin-coupled to the rotational hole 25, which is pin-connected to rotate the output shaft 23 by the clutch 24, and the cam mechanism 17 and the link. Each of the pins connecting the 18 to the cam mechanism by engaging the link 19, one end of which is pin-coupled to the shift control mechanism 27 rotated by the operating lever (26) It is possible to determine the rotation ratio of the output shaft 23 by adjusting the rotational widths of the 17 and the link 18.

The shift control opening 27 is formed with a guide hole (27a) and the side plate 20 is formed with a guide protrusion (20a) coupled to the guide hole (27a) to guide the rotation of the shift control opening (27) do.

In the present invention, the planetary gear unit 2 and the second transmission 12 are allowed to transmit power by gear coupling, but it is natural that a chain or the like may be used if necessary.

7 is a cross-sectional view showing another embodiment of the present invention, which constitutes the planetary gear unit 2 of the power-type continuously variable transmission 1 in the above-described configuration, wherein the sliding gear 9 is a sun gear ( 7 is shown integrally formed with the output gear 14 of the second transmission (12).

As described above, the present invention combines the second transmission 12 composed of the planetary gear unit 2 and the swing type actuator to increase and decrease the rotation ratio inputted to the input side of the planetary gear unit 2 to the output side. By providing a power classification type continuously variable transmission (1) which enables power injection without power disconnection during driving, easy shifting operation and shifting even in a stationary state.

When the present invention is applied to a bicycle, the planetary gear unit 2 is axially coupled to the drive shaft 3 and the bicycle frame 11 has a second transmission 12 so that the planetary gear unit 2 and the gear or the chain are coupled. Fixed installation, the operation lever 26 of the second transmission (12) can be easily installed by connecting the handle and the like configuration by connecting the wire and the like, according to the present invention pedal ( When 4) is pressurized, the carrier 6 is driven to output to the sprocket 7a integrally formed with the sun gear 7, wherein the sliding gear 9 fixed to the carrier 6 is driven by the pedal 4. It rotates together and is tooth-coupled with the output gear 14 of the second transmission 12, the ring gear 5 having a degree of freedom is tooth-coupled with the input gear 13 of the second transmission.

That is, the input gear 13 of the second transmission 12 is driven by the rotation of the ring gear 5 having the degree of freedom, and the input rotational force is increased through the gear group 16 so that the cam mechanism 17 is on both sides. The rotational motion is converted into linear motion by driving the cam-operated gear 22 coupled to the pin, and the linear motion made by the cam mechanism 17 is axially coupled to the output shaft 23 through the link 18. It is converted to arc motion while being transmitted to the pupil 25, and restored to rotation by the one-way clutch 24 inside the pivot 25, and the output gear 14 is rotated and transmitted to the carrier 6 so that the stepless speed change is achieved. Will be done.

At this time, in the present invention, one end of the pin 19 is fixed to the shift adjusting mechanism 27 which is rotated by the operation lever 26 on the pin connecting the cam mechanism 17 and the link 18 to the cam. Since the rotation ratio of the mechanism 17 and the link 18 is adjusted to determine the rotation ratio of the output shaft 23, the rotation ratio can be increased or decreased with the output shaft 23.

For example, the rotation ratio of the input and output of the planetary gear unit 2 is 1: 5, and the rotation ratio of the input and output of the second transmission 12 is also 1: 5, and the operating lever of the second transmission 12 6A, as shown in FIG. 6A, when the other end position of the link 19, whose one end is pinned to the connecting portion of the cam mechanism 17 and the link 18, is moved downward, the operating width of the link 18 increases. And the rotation angle Q1 of the rotation hole 25 for rotating the output shaft 23 to which the output gear 14 is coupled increases to increase the rotation ratio. Therefore, when the pedal 4 is pressed, the ring gear 5 is pressed. Since the output of the second transmission 12 is increased to a maximum value, that is, 5 times speed and transmitted to the carrier 6, the sun gear 7 is rotated at high speed 5 times.

On the contrary, when the operating lever 26 is operated to move the other end position of the link 19 upward as shown in FIG. 6B, the operating width of the link 18 is relatively reduced, so that the output gear 14 is coupled. Since the rotational angle Q2 of the rotational hole 25 for rotating the output shaft 23 is reduced to reduce the rotation ratio, when the pedal 4 is pressed, the second transmission 12 inputted through the ring gear 5 is pressed. Since the output is decelerated at the lowest speed 1x and transmitted to the carrier 6, the sun gear 7 is rotated at low speed at 1x speed. According to the present invention, power injection is performed without disconnection of power during driving through simple operation of the operating lever 26. This will be possible.

The present invention as described above is a planetary gear unit 2 made of a combination of a carrier gear 6 and a ring gear 5 and a sun gear 7 provided with degrees of freedom, a rocking actuator, that is, a cam mechanism 17 and a link 18. By using a simple combination of the second transmission 12 composed of (19), etc., it is possible to easily adjust the reduction ratio of the high ratio, so when applied to the present invention, such as bicycle or motorcycle, less frictional resistance than the conventional PIV-type transmission, While it is possible to solve the problems of the conventional bicycle transmission, such as power interruption, while the configuration is simple, it is possible to mass-produce at low cost, and the operability can be made very easily.

Claims (3)

Ring gear (5), carrier (6) and sun gear (7), each component is a planetary gear unit (2) which can selectively drive, output and degrees of freedom, Cam operation in which the input shaft 21 with the input gear 13 is coupled to the inside of the casing 15 sealed by both side plates 20 and 20 ', and the cam mechanism 17 corresponding to each other on the upper and lower sides is axially coupled. The gear group 16 is provided between the gears 22, and the end of each cam mechanism 17 is pin-linked at one end to the rotation hole 25 coupled to the one-way clutch 24 axially mounted to the output shaft 23. The pin 19 is connected to the pin, and each of the pins connecting the cam mechanism 17 and the link 18 has a link 19 having one end pinned to the shift control mechanism 27 rotated by the operation lever 26. Combination of the second transmission 12 to adjust the rotational width of the cam mechanism 17 and the link 18 to determine the rotation ratio of the output shaft 23, The output shaft 23 of the second transmission 12 is different from the component given the degrees of freedom of the planetary gear unit 2, the input shaft 21 of the second transmission 12, and the component given the output of the planetary gear unit 2. ), A power class type continuously variable transmission, characterized in that the output of the planetary gear unit (2) is configured to be connected to each other by a gear or a chain to adjust the rotational speed of a given component. The method of claim 1, Drives the carrier 6 and outputs it to the sun gear 7 and the ring gear 5 of the planetary gear unit 2 given the degree of freedom in the ring gear 5 and the input gear 13 and carrier of the second transmission 12. A power class CVT comprising a gear connection between the gear 6 and the output gear 14. The method of claim 1, Drives the carrier 6 and outputs it to the sun gear 7 and the ring gear 5 of the planetary gear unit 2 having the degrees of freedom in the ring gear 5 and the input gear 13 and the sun gear of the second transmission 12. (7) and the output gear (14) is a power class type continuously variable transmission characterized in that the gear configuration.