JP2002174308A - Continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a meshing type continuously variable transmission not resorting friction transmission. SOLUTION: One special sprocket is provided by attaching a plurality of small sprockets attached with backstops on a device capable of radially moving attached objects the same amount at the same time. A polygonal circumference formed by winding a chain around outer sides of the plurality of small sprockets is considered as a superficial pitch circle circumference. This transmission is characterized by that the special sprockets are attached to input and output shafts, respectively, they are interlocked by looping a chain loop around them, the superficial pitch circle circumferences are changed at respective special sprockets, and a rotational frequency of an output shaft side is changed by using the ratio thereof as a gear ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical continuously variable transmission.

[0002]

2. Description of the Related Art Conventional mechanical methods for continuously changing the speed continuously include a belt transmission using a special belt wheel whose apparent wheel diameter can be changed, and a friction wheel on the input side being used to change the friction on the output side. A method of changing the position to be pressed against the car and changing the speed has been put to practical use, but there is no device that continuously changes the speed in a mechanically engaged state, and most of them transmit power in expectation of frictional force. I have.

[0003] A belt transmission type continuous stepless transmission expects frictional force between a belt wheel and a belt, and it is difficult to secure the frictional force when a large power is transmitted or when the load fluctuates.

Further, in the transmission method by pressing a friction wheel, a large pressing force is required to secure a friction force when transmitting a large power, and special materials, rigidity, and processing accuracy are required.

In this method, as in the case of the belt transmission type, when a large power is transmitted or when the load fluctuates, if the load is large, it is difficult to secure the frictional force, and the manufacturing cost is high. In the method using the frictional force, since there is no mechanical meshing portion, it is difficult to stably transmit power when the friction coefficient changes, so that the use environment is restricted.

[0006] Transmissions are widely used in industrial machines and transporting machines in large quantities for the purpose of speed control. Recently, general electric appliances such as air conditioners are also sold with speed control functions. In particular, it is often used for machines related to transportation as seen in the processing lines of automobiles and factories, etc., and the speed control is becoming more precise and complicated year by year. In the future, a highly reliable and inexpensive transmission that can easily perform continuous and more flexible control from step-like control is expected.

[0007] The transmission of a transporting machine is expected to adopt a continuous control method rather than a step-like control in which an impact is likely to occur due to a mechanical reason as the weight to be transported is larger. As the traffic situation worsens in the large market of automobile transmissions, the situation judgment work has become more important than the complicated machine operation, and as a result, the step-like manual transmission method combining gears and clutches has made it easier to operate. In recent years, automatic transmissions that do not require a clutch operation are becoming mainstream, but if they can be shifted only with the accelerator, they will approach the technology of unmanned driving. Many of the automatic transmissions currently installed in automobiles are extension technologies combining gears and clutches, and are thought to basically inherit the disadvantages of the stepwise shifting method.

Recently, automobiles equipped with a highly-completed metal belt type and a frictionless transmission type continuous stepless transmission using a special transmission oil have been sold. There are many low-power vehicles and many friction-powered vehicles are high-priced vehicles. In addition, there are many unclear points concerning maintenance and life.

Although relatively simple transmissions mounted on the electric motor include inverters and thyristor controls, there are problems such as high cost, poor characteristics such as low-speed characteristics, and noise. I can't say it.

[0010]

SUMMARY OF THE INVENTION The problems of the metal belt type and the friction transmission type using a special transmission oil, which are not mechanically engaged transmission methods, have been solved by another mechanically engaged transmission method. It is intended to be solved by a transmission method.

[0011]

SUMMARY OF THE INVENTION A transmission according to the present invention uses a conventional intermittent and step-by-step transmission method of a chain transmission by a mechanism capable of arbitrarily changing an apparent pitch circumference (and consequently the number of teeth). By using a special sprocket with a gear, it was possible to continuously and continuously change gears while mechanically meshing, and the conventional problems were solved.

The transmission of the present invention has a simple structure and shifts while maintaining the mechanical meshing state. Therefore, the transmission is more reliable with respect to a large load or load fluctuation than a friction transmission type. When the size of the transmission power is increased as in the method, it is not necessary to increase the required friction area and the rigidity of the frame. This is advantageous in terms of size, rigidity, and weight as compared with the friction transmission type transmission method, and the overall size and weight are reduced. It becomes possible. The transmission of the present invention can use many standard products and can reduce the production cost as compared with a conventional friction transmission type transmission in which the production accuracy and material are selected.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The conventional discontinuous step shifting method used in chain transmission is changed to a small, lightweight and low-cost mechanical meshing structure by employing a sprocket having a special function. Continuously stepless transmissions can be manufactured.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The transmission of the present invention has a structure in which two special sprockets composed of a plurality of small sprockets and two chain wheels are combined, and a special sprocket mounted on the input shaft side and a special sprocket mounted on the output shaft. The sprocket is interlocked with the chain wheel, and is a device that can continuously change the speed continuously in both the forward and reverse rotation directions of the chain wheel.

The functional sprocket has a functionally substantial shape in the form of a polygon having a plurality of small sprockets arranged at regular intervals on the same circumference as corners, and by sliding a plurality of small sprockets radially. By changing the size of the square in a similar manner and changing the apparent pitch circumference of the special sprocket, the same effect as changing the number of teeth is obtained.

The basic form of the present invention is shown in FIG. 1 in which a special sprocket is attached to each input / output shaft and two chain wheels are linked and interlocked. As shown in FIG. 5, a special sprocket is attached to the input / output shaft. One type of sprocket is a normal sprocket, the output shaft of one transmission is connected to the input shaft of another transmission as shown in Fig. 6, or this is repeated to form a single transmission. Is possible.

The transmission type to be applied is considered to be basically a chain type that transmits the rotational force while continuously meshing. However, depending on the magnitude of the load and the rotation speed, a timing belt type or a V type is used.
Transmission methods such as belt and rope types can be used.

An example of the structure of a transmission of the chain transmission type, which is the basic transmission type of the transmission of the present invention, will be described with reference to the schematic diagram of FIG. The special sprocket is a power distribution device 14,
Driving device 10, power source supply device 9, external thread rod 3, slide frame 4, guide for preventing rotation 15, a plurality of small sprockets 1 mounted on both front and back and reverse rotation preventing device 2
Consists of

The power distribution device 14 at the center of the special sprocket uses two types of structures depending on the use conditions. One is that an even number of small bevel gears 18 are meshed with each other to form an annular gear ring, and each of the small bevel gears 18 is fixed to a rotating shaft and the end of the rotating shaft is connected to the power distribution device so that the male screw rod 3 can be connected. As shown in FIG. 2, the male screw rod 3 is rotated by projecting radially outside the case 14 and engaging a drive gear 22 connected to the drive device 10 with a part of an annular gear ring.

The other is to mesh a plurality of small bevel gears 18 at equal intervals so as not to interfere with one side of a large gear (bevel gear, bevel gear, etc.) 23 having teeth machined on both sides. The large gear 23 rotates together with the case of the power distribution device 14 via a plurality of meshed small bevel gears 18, but is not fixed to the transmission shaft. Each small bevel gear 18 is fixed to a rotating shaft, and the end of the rotating shaft projects radially out of the gear case of the power distribution device 14 so that the male screw 3 can be connected to the shaft. The required number of driving gears 22 connected to the driving device 10 for rotating the male screw rod 3 are mounted by meshing with a required number of large gears 23 on a surface opposite to a surface on which a plurality of small bevel gears 18 are meshed. belongs to.

The male screw rod 3 can be attached to all of the rotating shafts of the small bevel gear 18 protruding from the gear case of the power distribution device 14. The screw shape of the male screw rod 3 is a small bevel gear 18 in the power distribution device 14 of the type shown in FIG.
The direction of rotation of the small bevel gears 18 may be uniform because they coincide with each other, but when mounted on a power distribution device 14 of the type shown in FIG. It is necessary to align the moving direction of the slide frame for proper use.

Further, the thread shape of the male screw rod 3 needs to be meshed with a female screw cut in the slide frame 4. .
The plurality of male screw rods 3 used for one special sprocket are not limited in shape, but all have the same screw pitch in order to make the moving amount of the slide frame 4 to be attached the same.

Further, by changing the combination of the male screw of the male screw rod 3 and the female screw of the slide frame 4 to a combination of a ball screw and a ball nut having small rotational friction, a high-speed shifting operation can be performed.

The power distribution device 14 rotates the male screw bar 3 to move the slide frame 4 meshing with the male screw bar 3 with the force of the screw. Screw friction and drive 1
Although the position of the slide frame 4 is held by the holding force of 0, the position of the slide frame 4 is held by using a drive device 10 having a brake and a servo function as necessary.

Slide frame 4 attached to male screw rod 3
Is rotated by the rotational force of the male threaded rod 3 that is engaged when it is attached alone, so that it is moved along the guide 6 for preventing rotation.

The left and right mounting shafts 5 protruding on both sides with a female screw passing through the center of the slide frame 4 are rotated so that the rotatable directions are opposite to each other. The small sprocket 1 is mounted via the reverse rotation preventing device 2 so that the rotatable directions are aligned.

2 and 3, the drive unit 10 is fixed to a gear case of a power distribution unit 14 which rotates as a part of a special sprocket. Therefore, a power source supply device 9 is required to supply a power source from a power source located at a non-rotating place to a driving device 10 attached to a special sprocket that rotates together with the input / output shaft. For example, a power source supply device such as a slip ring type for transmitting electricity and a rotary swivel type for transmitting oil or air is required.

In the transmission according to the present invention, the special sprocket of the above-mentioned structure to be mounted is viewed from the input / output axis direction so that the rotatable directions of the constituent small sprockets are opposite to each other, and therefore are viewed from opposite directions. The small sprockets are fixed to the input and output shafts so that the directions in which the small sprockets can rotate are also opposite to each other. The transmission chain wheels are turned around the small sprockets constituting the special sprockets, and one chain wheel of the same length is hung on each of the small sprockets mounted on both sides of the slide frame.

In FIG. 4, small sprockets on the surface 19-1 of the special sprocket 19 attached to the input shaft 8 are E, F,
G and H, and the small sprocket on the back 19-2 is E ',
Assuming that F ', G', and H ', the mounting axes of E and E', F and F ', G and G', and H and H 'are on the same coaxial line and 19-1 on the back surface of the special sprocket 19 respectively. In 19-2, the direction in which the anti-reverse device attached to the small sprocket functions is reversed, the rotatable direction is reversed, and the surfaces 19-1 and 1
On the 9-2 surface, the direction of rotation is unified and mounted. 19-
1 and 19-2 are the front and back of one special sprocket 19 fixedly attached to the input shaft 8, and therefore rotate in the same direction as the input shaft 8.

Special sprocket 2 mounted on output shaft 11
0 indicates the direction in which the anti-reverse device attached to the small sprockets A, B, C, and D on the surface 20-1 functions, and the small sprockets E, F, G, and S on the surface 19-1 of the special sprocket 19 attached to the input shaft 8. Attach so that the reverse rotation prevention device attached to H works in the opposite direction to the direction in which it functions. Surface 20-1
The rotation directions of the small sprockets A, B, C, and D on the rear surface 20-2 and the small sprockets A ', B', C ', and D' on the back surface 20-2 are opposite to each other. Rotates in the same direction and the same direction as the back surface of the special sprocket 19.

In FIG. 4, the small sprockets E, F, on the surface 19-1 of the special sprocket 19 mounted on the input shaft 8 are shown.
When the direction in which G and H can be rotated is clockwise, the back surface 19-2
The rotatable directions of the small sprockets E ', F', G ', H' are counterclockwise, and the small sprockets A, B, C, D on the surface 20-1 of the special sprocket on the output shaft 11 side are rotatable. Since the attachment is performed in a counterclockwise direction, the rotatable direction of the small sprockets A ', B', C ', and D' on the back surface 20-2 is clockwise.

When the input shaft 8 is rotated in the clockwise direction R, the small sprockets E, F, G and H on the surface 19-1 of the special sprocket 19 are fixed and the rotational force is reduced.
1 to rotate the chain wheel 7-1 clockwise. Although it rotates clockwise on the back surface 19-2 of the special sprocket 19, the direction in which the small sprockets E ', F', G ', and H' can rotate is opposite to the rotation direction of the input shaft 8, so the chain wheel 7-2. Can not transmit torque. Output shaft 1
Surface 20-1 of special sprocket 20 attached to
The small sprockets A, B, C, and D receive the torque from the chain wheel 7-1 rotating clockwise to rotate the output shaft 11 clockwise. The output shaft 11 rotates the back surface 20-2 of the special sprocket 20 clockwise, and the rotational force is transmitted to the small sprockets A ', B', C ', and D' which can rotate clockwise, and the chain wheel 7-2 rotates clockwise. Let it. Chain wheel 7-
Since the small sprockets No. 2 and 19-2 do not transmit the torque, the chain wheel 7-2 and the chain wheel 7-1 seem to rotate in the same direction, but the torque is transmitted by the chain wheel 7-1. Only.

When the input shaft 8 is rotated in the counterclockwise direction L, the surface 19 of the special sprocket 19 attached to the input shaft 8 is rotated.
-1 rotates counterclockwise, but small sprockets E, F,
G and H can be rotated clockwise, so the chain wheel 7-
No torque is transmitted to 1. The torque of the input shaft 8 is transmitted to the back surface 19-2, and the small sprockets E ', F',
Since the directions in which G 'and H' can rotate are counterclockwise, the chain wheels 7-2 are rotated from the small sprockets E ', F', G 'and H'.
And the chain wheel 7-2 is rotated counterclockwise. The chain wheel 7-2 transmits the rotating force to the small sprockets A ', B', C ', and D' on the back surface 20-2 of the special sprocket 20, rotates the special sprocket 20 counterclockwise, and rotates the output shaft 11 counterclockwise. Rotate to. The rotation of the small sprockets A, B, C, and D of 20-2 attached to the output shaft 11 is clockwise, so that the rotational force of the output shaft 11 is transmitted to the chain wheel 7-1. Wheel 7-
Since the small sprockets 1 and 19-1 do not transmit torque, the chain wheel 7-1 and the chain wheel 7-2 apparently rotate in the same direction, but the chain wheel 7-2 transmits torque. Only.

The two chains of the chain wheel 7-1 and the chain wheel 7-2 have the same shape on the back surface and rotate even when the mounting diameter of a plurality of small sprockets changes due to acceleration / deceleration.
This is the same as having one row-type chain, and the rotation direction and rotation speed are the same.

When the speed is increased from the state where the input shaft 8 is rotating in the right rotation R direction, the following operation is performed.

The apparent pitch circumference formed by the small sprockets E, F, G, and H of the special sprocket 19 on the input shaft side is determined by the small sprockets A, B, C, and D of the special sprocket 20 on the output shaft side. Larger than the apparent pitch circumference.

Power is supplied from the power source supply device 9 to the driving device 10 attached to the power distribution device 14 of the special sprocket 20 on the output shaft 11 side, and the driving gear 22 is rotated. The gear is rotated, and the male screw 3 attached to the gear is rotated.

As a result, the slide frame 4 attached to the male screw rod 3 is moved, and the small sprockets A, B, C, and D on the surface 20-1 constituting the special sprocket 20 on the output shaft 11 are moved toward the center of rotation. And reduce the apparent pitch circumference. At this time, the small sprockets A ', B', C ', and D' on the back surface 20-2 attached to the same slide frame 4 also move toward the center of rotation.

At the same time, while appropriately maintaining the tension of the chain wheel, small sprockets E, F, and F attached to the surface 19-1 of the special sprocket 19 on the rotating input shaft 8 side
G and H are moved away from the center of rotation of the special sprocket 19 by rotating the male screw 3 attached to the power distribution device 14 in the same manner as the special sprocket 20 on the output shaft 11 side, thereby increasing the pitch circumference. I will do it. At this time, the small sprockets E ', F', G ', and H' attached to the back surface 19-2 attached to the same slide frame of the special sprocket 19 also move away from the center of rotation.

At this time, in the special sprocket 20 on the output shaft 11 side, since the apparent pitch circumference becomes small, the surface 2
The chain length wrapped around the small sprockets A, B, and C of 0-1 is also small sprocket A 'of the back surface 20-2,
The length of the chain wrapped around B 'and C' is also left.

The surface 20-on which the chain wheel 7-1 for transmitting rotation to the special sprocket 20 on the output shaft 11 side is hung.
The small sprockets A, B, C, and D rotate in the direction opposite to the rotation direction of the chain wheel 7-1.
The same rotation direction as -1 is integrated with the mounting shaft of the slide frame, and a reverse rotation prevention device is attached to prevent rotation.
Small sprockets A ', B', C 'on the back 20-2,
A reverse rotation preventing device is attached to D 'so as not to rotate in the direction opposite to the rotation direction of the chain wheel 7-2.

Therefore, the special sprocket 2 on the output shaft 11 side
The extra chain length on the surface 20-1 of the zero
It is not sent out in the rotation direction of -1, but is sent out between the small sprocket C and the small sprocket G behind the special sprocket 20 on the output shaft 11 side to the so-called return side (slack side) on the front side where the chain is retracted. . On the other hand, back 2
The surplus chain length of 0-2 is sent out between the small sprocket A 'and the small sprocket E' in the rotation direction of the chain wheel 7-2.

The surface 19-1 of the special sprocket 19 on the input shaft 8 side also has a direction opposite to the rotation direction of the chain wheel 7-1 due to the function of the reverse rotation preventing device attached to the small sprockets E, F, G and H. Does not move, the extra chain length on the surface 20-1 of the output shaft 11 is not absorbed by the surface 19-1 of the special sprocket 19 on the input shaft 8 side. On the other hand, since the small sprockets E ', F', G ', H' on the back surface 19-2 and the chain wheel 7-2 are in a free state in which torque is not transmitted, the surplus chain length of the small sprocket of 20-2 is 19 It moves toward the small sprocket of -2 and is absorbed.

To increase the apparent pitch circumference of the special sprocket 19 on the input shaft 8 side, each of the small sprockets E, H, and G on the surface 19-1 meshing with the chain is used.
And small sprockets E ', H', G 'on the back 19-2
Since the distance between the sprockets is evenly and simultaneously increased, the chain length between the small sprockets constituting the special sprocket 19 on the input shaft 8 side is insufficient.

The length of the chain between the small sprockets E, H, and G is the same at the same time, but the rotation direction of the chain wheel 7-1 is determined by the action of the attached anti-reverse device. , E, H, and G, the shortest chain length is such that the leading small sprocket G meshing in the rotation direction of the chain wheel 7-1 is a chain behind the meshing portion (in the direction of the small sprockets H and E). Replenish in the form of pulling in.

The replenishment of the insufficient chain length between the small sprockets E, H, and G is performed at the same time, so that the leading small sprocket G in the chain rotation direction is engaged with the small sprockets E, H, and G. All shortage lengths will be pulled in at once.

The small sprockets H and E following the leading sprocket radially separate from the adjacent small sprockets while being rotated by the chain into which the leading small sprocket G is pulled while preventing the chain wheel from reversing.

On the other hand, between E ', H' and G 'on the back surface 19-2, the chain wheel does not transmit the rotational force to the small sprocket (the chain wheel is not restrained by the small sprocket). C 'in the rotation direction of
Sent from G 'part.

The spacing between the small sprockets on the surface 19-1 of the special sprocket 19 on the input shaft 8 side is increased, the apparent pitch circumference length is increased, and the apparent number of teeth is increased. Also, the spacing between the small sprockets on the surface 20-1 of the special sprocket 20 on the output shaft 11 side is reduced and the apparent pitch circumference is reduced, so that the apparent number of teeth is reduced.
The rotation speed of the special sprocket 20 on the side increases, and the output shaft 11
Rotation speed increases.

When decelerating from the state where the input shaft 8 is rotating clockwise R, the following operation is performed.

In order to reduce the rotation speed of the output shaft 11 side from the rotation speed of the input shaft 8 side and reduce the speed, the apparent pitch circumferential length of the special sprocket 19 of the input shaft 8 side is adjusted by the special sprocket of the output shaft 11 side. 20 is smaller than the apparent pitch circumference.

A plurality of small sprockets of the special sprocket 20 on the output shaft 11 side are moved in a direction away from the center of rotation of the special sprocket 20 by rotating a male screw to increase the apparent pitch circumference. On the other hand, a plurality of small sprockets attached to the special sprocket 19 on the input shaft 8 side are moved to the rotation center side of the special sprocket 19 in a similar manner to reduce the apparent pitch circumference.

When the rotation direction of the input shaft 8 is the right rotation R direction, the rotation force is applied to the surface 19-1 of the special sprocket 19 on the input shaft 8 side and the surface 20-1 of the special sprocket 20 on the output shaft 11 side. The transmission is transmitted by the chain wheel 7-1. As described above, the small sprockets 19 ', F', G ', and H' of the 19-2 are idled on the chain wheel 7-2 side, and are not involved in transmitting the rotational force. .

As for the small sprockets E, F, and G on the surface 19-1 of the special sprocket 19 on the input shaft 8 side, if the apparent pitch circumferential length is reduced, the chain length wound around becomes too large. , F, G and H do not rotate in the direction opposite to the direction of rotation of the chain wheel 7-1, so the extra chain length is between the small sprocket G and the small sprocket C in the direction of rotation of the chain wheel 7-1, so-called. It is sent to the return side (slack side).

The special sprocket 20 on the output shaft 11 side
Means that the plurality of small sprockets A, B, C, and D do not rotate in the rotation direction of the chain wheel 7-1 due to the function of the anti-reverse device, so that the surplus chain length is smaller than the chain wheel 7-1.
The special sprocket 20 on the output shaft 11 does not absorb the extra chain length on the input shaft 8 side.

When the apparent pitch circumference of the small sprockets A, B, C, and D on the surface 20-1 of the special sprocket 20 on the output shaft 11 side is increased, each small sprocket engaged with the chain wheel 7-1. Since the distances between A, B, C, and D are simultaneously and uniformly increased, the chain length between the small sprockets is insufficient.

In the special sprocket 20 on the output shaft 11 side, among the small sprockets A, B, C, and D on the surface 20-1, the last small sprocket C in the direction opposite to the rotation direction of the chain wheel is the small sprocket A, The special sprocket 20 is rotated clockwise such that the short chain length between B and C is pulled at once from the small sprockets B and A in the traveling direction of the chain wheel 7-1.

The small sprockets A and B before the rear end are separated from the adjacent small sprockets while being rotated by the chain to which the last small sprocket C is pulled while preventing the chain wheel 7-1 from reversing, and the output shaft is rotated. The surface 20-1 of the special sprocket 20 on the eleventh side increases the apparent pitch circumference.

The small sprockets A ', B', C ', and D' on the back surface 20-2 of the special sprocket 20 are on the front surface 20-1.
Also, since it is mounted on the same slide frame, the chain length between the small sprockets is also short. The rotatable direction of the small sprockets A ', B', C ', and D' is the direction of rotation of the chain wheel 7-2. Therefore, the short chain length between the small sprockets and the small sprocket A ' E 'on the back surface 19-2 of the special sprocket 19 which is pulled in at once from B'C'
F ', G', and H 'are in a state in which the rotational force is not transmitted to the chain wheel 7-2 (the state in which the chain wheel is not restrained by the small sprocket), and the shortage is sequentially C'G' in the rotation direction of the chain wheel 7-2. Sent from part.

By repeating the above operation little by little, the apparent pitch circumference of the special sprocket 19 on the input shaft 8 side is reduced and the apparent pitch circumference of the special sprocket 20 on the output shaft 11 side is increased. Deceleration is possible.

When the input shaft 8 is turned in the left rotation L direction, 1
When 9-1 rotates counterclockwise, small sprockets E, F, G,
H rotates idly and does not transmit torque to the chain wheel 7-1.
The operation principle of acceleration and deceleration between the two small sprockets is the same as that of clockwise rotation.

In the case of transmitting the rotational force without shifting with the device of the present invention, the special sprockets 19 and 20 attached to the input shaft and the output shaft are made of a plurality of small sprockets 19-1 and 20-1. The apparent pitch circumferences of 19-2 and 20-2 are the same.

Since the length of the chain wheel is constant, while controlling the tension of the chain, indirectly controlling the number of rotations of the male screw rod and directly controlling the position of the slide frame determine the operation at the time of shifting. No special control method is required.

As the control method of a machine, digital control capable of continuous, fine and accurate control has become mainstream, and it is expected that the control will be greatly developed in the future with the development of computers. It is expected that in the future, the operation of machines to be converted will be able to continuously and finely and accurately operate. The transmission is also shifting from the conventional intermittent and step-by-step shifting method to a continuous stepless shifting method. Continuous stepless transmissions have also been put into practical use, but they are still in the category of special devices, and many transmissions that are currently in widespread use have a step-like control in which the mechanical part of power transmission is a combination of gears and the like. The development of low-cost, continuously stepless transmissions with many types is expected. When the continuous continuously variable transmission according to the present invention is put into practical use, the scope of application is basically not limited by the power scale, and it can be compared with an expensive friction-driven continuous continuously variable transmission that has begun to be put into practical use. There are many advantages in price, weight, dimensions, etc., and demand can be expected in a wide range of industrial fields such as bicycles, automobiles, construction machinery, agricultural machinery, ships, factory production lines, etc. The prime mover to be combined is not only an engine but also a mechanical type transmission that is strong in the working environment has a wide range of applications.It can be used as a method to bridge the shortcomings of the electric transmission method found in inverters and as a transmission for electric motors in home appliances etc. Can be expected.

[Brief description of the drawings]

FIG. 1 is a schematic view of an example in which a special sprocket is mounted on both an input shaft and an output shaft. The upper diagram is a diagram viewed from above, and the lower diagram is a diagram viewed from the front.

FIG. 2 is a schematic diagram of a power distribution device. The upper diagram is a diagram viewed from above, and the lower diagram is a diagram viewed from the front.

FIG. 3 is a schematic diagram of a power distribution device. The upper diagram is a diagram viewed from above, and the lower diagram is a diagram viewed from the front.

FIG. 4 is an explanatory diagram of a method of transmitting torque.

FIG. 5 is a schematic diagram in which a sprocket whose shape does not change and a special sprocket are combined.

FIG. 6 is a schematic view of an example in which a plurality of units are combined.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 small sprocket 2 reverse rotation prevention device 3 male screw rod 4 slide frame 5 small sprocket mounting shaft 6 rotation prevention guide 7 chain wheel 8 input shaft 9 power source supply device 10 drive device 11 output shaft 12 tension device 13 control sensor 14 power distribution Apparatus 15 Anti-rotation side plate 16 Special sprocket 17 Sprocket whose shape does not change 18 Small bevel gear 19 Input shaft side special sprocket 20 Output shaft side special sprocket 21 Connecting shaft 22 Drive gear 23 Large gear with teeth on both sides

Claims (9)

[Claims] A transmission according to the present invention comprises a special sprocket mounted on an input / output shaft, a chain wheel mounted on the sprocket, and a control device. The special sprocket is composed of power distribution device, external thread bar, slide frame, drive device, power source supply device, reverse rotation prevention device, and small size propet. The power distribution device is a gear case in which gears are meshed.A plurality of rotating shaft ends project radially out of the gear case at equal intervals, and a plurality of shafts protruding from the gear case by a driving device attached to the power distribution device. The ends are rotated the same number. A male screw rod is attached to the shaft end protruding from the gear case of the power distribution device so that the left and right screw directions are properly used so that the slide frame moves in the same direction. The male screw rod meshes with and penetrates a female screw hole formed in the slide frame, and the slide frame moves on the male screw rod by rotation of the male screw rod. Since the drive rotates with the special sprocket, the power source is supplied through the power source supply. The small sprockets are mounted on the slide frame with a female screw hole in between, and one non-rotating fixed shaft for mounting the small sprocket is placed one at a time on the left and right. So that the direction of rotation on the back surface of the special sprocket is reversed,
Unify the rotatable directions of each surface and attach one small sprocket to each mounting shaft. According to the transmission of the present invention, two special sprockets are provided, one each for two parallel input shafts and two output shafts, and the small sprockets mounted on the respective special sprockets are rotated in opposite directions when viewed from the axial direction. (That is, the rotation direction is reversed even when viewed from the opposite direction.) Install and fix two chain wheels for transmission between the special sprockets by turning the outside of a plurality of small sprockets, one on each side. Hang two. If necessary, install a chain tensioning device, idler, stopper, etc. to smooth the movement of the chain wheel. In the special sprocket of the above structure attached to the input shaft and output shaft, the outer circumference of the polygon made of multiple small sprockets becomes the apparent pitch circumference of the special sprocket, and the multiple small sprockets move radially As a result, the resulting polygon is reduced and expanded in a similar manner, changing the apparent pitch circumference and changing the apparent number of teeth of the special sprocket. Inserting a special sprocket with the above structure, mounting it on the output shaft, changing the apparent number of teeth by controlling the apparent pitch circumference, and enabling shifting in both forward and reverse rotation directions A continuously meshing continuously variable transmission. 2. The apparatus according to claim 1, wherein the special sprocket on the input shaft side is a sprocket whose shape does not change. 3. The apparatus according to claim 1, wherein the special sprocket on the output shaft side is a sprocket whose shape does not change. 4. An output shaft of a device according to claim 1, 2 or 3 is connected to an input shaft of another device according to claim 1, 2 or 3. Or a device characterized by repeating connection and using a plurality of units in combination. 5. The apparatus according to claim 1, wherein a special sprocket is used in which a male screw of the slide device is a ball screw, and a female screw portion of the slide frame which meshes with the male screw is a nut for a ball screw. Apparatus according to claim 1. 6. A small sprocket using a chain wheel such as a roller chain or a silent chain for a chain wheel for transmission between an input / output shaft and a chain wheel corresponding thereto. An apparatus according to claim 5. 7. A belt wheel or a belt such as a V-belt, a toothed belt or a rope is used as a chain wheel for transmission between input and output shafts, and a pulley wheel corresponding to the small sprocket is used. The apparatus according to claim 1, wherein the apparatus comprises: 8. A power distribution device for use in a transmission according to claim 1, wherein an even number of bevel gears is meshed with a gear ring for interlocking engagement, and each bevel gear is connected and fixed to a shaft, and a male screw rod is provided. The shaft end protrudes out of the case of the power distribution device so that can be connected. A power distribution device characterized by a structure in which a part of a bevel gear meshed with a ring is meshed with a driving gear connected to a driving device for rotating them. 9. A power distribution device for use in a transmission according to claim 1, wherein teeth are cut on both sides and one side is a large bevel gear so that a small bevel gear does not interfere with a single bevel gear on one side. Then, radially mesh. The bevel gear is connected and fixed to the shaft, and the shaft end protrudes out of the case of the power distribution device so that the male screw rod can be connected. A power distribution device having a structure in which a driving gear connected to a driving device for rotating the large gear is engaged with another surface of a large gear.