JP2852861B2 - Power transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device,
In particular, it is a power transmission device that transmits power to an industrial machine requiring a large output, such as an injection molding machine or a press working machine, and can control the driving thereof.

[0002]

2. Description of the Related Art In order to automate mechanical devices, actuators such as electric motors, hydraulic motors, hydraulic cylinders, and air cylinders are frequently used.

[0003] These actuators are required to have stop accuracy, speed accuracy, output performance, and the like depending on the specifications of the drive system.

For example, a hydraulic servo system using a hydraulic motor, a hydraulic pump, or the like is mainly used for an injection molding machine, a press machine, or the like that requires a large output and quick response.

[0005] On the other hand, in the case of industrial robots, machine tools, and the like that require stop precision and speed precision, control motors such as servo motors and spindle motors are mainly used.

[0006]

However, in a drive system using hydraulic pressure or pneumatic pressure, a large output and good stopping accuracy can be obtained, but the generated torque varies depending on temperature conditions and the like. There is a disadvantage that it cannot be secured.

On the other hand, according to a drive system using a control motor such as a servomotor, stable speed accuracy and high responsiveness can be obtained, but a large output cannot be generated. It is only used for

The present invention has been made in view of the above circumstances, and provides a power transmission device capable of transmitting a large output to a drive system and controlling its speed, stop position, and the like. It is assumed that.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a flywheel to which external power is transmitted, and forward and reverse rotations arranged in parallel to transmit the power of the flywheel and rotate in opposite directions. And a coil mounted on the outer periphery of both drums and wound in opposite directions, and a transmission gear driven by a control motor that is rotatable forward and reverse with one end of the coil locked. The object is achieved by providing a power transmission device including a drive wheel to which the other end of the coil is locked, and an output shaft driven by the drive wheel.

The present invention also provides a flywheel to which external power is transmitted, a planetary gear mechanism including a sun gear to which the power of the flywheel is transmitted via a clutch, and a mutual transmission of the power of the flywheel. A forward / reverse rotation drum arranged in parallel to rotate in the opposite direction, a coil mounted on the outer periphery of both drums and having winding directions opposite to each other, and one end of the coil is locked. A transmission gear driven by a control motor capable of rotating forward and reverse; a drive wheel having the other end of the coil locked and connected to a ring gear of the planetary gear mechanism; and a drive gear connected to a planetary gear of the planetary gear mechanism. The above object is achieved by providing a power transmission device having an output shaft that is used.

Further, the present invention provides a flywheel rotatably provided at one end of an input shaft, a motor for transmitting power to the flywheel, a clutch for transmitting power of the flywheel to the input shaft, A planetary gear mechanism including a sun gear provided at the other end of the input shaft, and rotatably provided at one end of a support shaft arranged in parallel with the input shaft, and the power of the flywheel is transmitted to rotate in opposite directions. A forward / reverse rotation drum arranged in parallel, a speed change gear rotatably provided on both drums and driven by a control motor capable of forward / reverse rotation, and rotating at the other end of the support shaft, respectively. A drive wheel freely provided and connected to a ring gear of the planetary gear mechanism;
Coils wound around the two drums, one end of which is locked to the transmission gear at one end and the other end of which is locked to the drive wheel, and the output shafts of which are connected to the planetary gears of the planetary gear mechanism. The above object is achieved by providing a power transmission device having:

[0012]

According to the power transmission device of the first aspect of the present invention, when external power is applied to the flywheel, the power is transmitted to both the forward and reverse rotation drums, and the two drums are rotated in opposite directions. It will rotate in the direction.

Therefore, when the control motor is rotated forward, that is, rotated in the same direction as the flywheel, the power is transmitted to the transmission gear via the pinion.

Then, a value obtained by multiplying one end of the coil on the side of the forward rotation drum (or the reverse rotation drum) by the output torque of the control motor and the reduction ratio between the control motor and the transmission gear acts as a pulling force.

That is, if the pulling force is F, the output torque of the control motor is T, and the reduction ratio is N, the following equation is obtained.

[0016]

(Equation 1)

On the other hand, when the pulling force F acts on one end of the coil, the drive wheel is pulled at the other end and rotates.

If the pulling force of the drive wheel by the other end of the coil is F ', this pulling force F' is given by the following equation.

[0019]

(Equation 2)

Where n is the number of turns of the coil, μ is the coefficient of friction between the drum and the coil, and π is the pi.

Therefore, a maximum pulling force acts on the drive wheel, and the output shaft is driven by this.

According to the power transmission device of the first and second aspects of the present invention, when external power is applied to the flywheel, the power is transmitted to the sun gear of the planetary gear mechanism via the clutch.

Then, the planet gear rotates around the sun gear, and the movement is transmitted to the output shaft via the rotary disk.

On the other hand, the power of the flywheel is simultaneously transmitted to both the forward and reverse rotation drums, and these two drums rotate in opposite directions.

Then, when the control motor is rotated forward, that is, rotated in the same direction as the flywheel, the power is transmitted to the transmission gear via the pinion.

Then, a pulling force acts on one end of the coil on the side of the forward rotation drum (or the reverse rotation drum) as in the above formula (Equation 1).

When the pulling force F acts on one end of the coil, the drive wheel is pulled at the other end and rotates.

The pulling force of the drive wheel by the other end of the coil is as shown in the above equation (Equation 2).

Therefore, a maximum pulling force acts on the drive wheel, whereby the ring gear meshing with the drive wheel is rotated.

Thus, the planetary gear mechanism acts as a differential so that when the ring gear is rotated in the same direction as the sun gear, the rotational movement of the planetary gear increases and the output shaft also increases in synchronism with it. become.

When the ring gear is rotated in the reverse direction of the sun gear, the turning movement of the planetary gear is reduced. In particular, when the ring gear rotates at a higher speed than the sun gear, the planetary gear also turns in the rotation direction of the ring gear. The output shaft also reverses.

[0032]

FIG. 1 is a schematic front view showing a first embodiment of a power transmission device according to the present invention, in which reference numeral M denotes a control motor, and reference numeral 20 denotes a forward rotation. Drum, 20 'is a reverse rotation drum, 24, 24' are transmission gears,
28 and 28 'are drive wheels and 50 is a flywheel.

As shown in the figure, a control motor M is connected to a pinion 10 via a timing belt t. One side of the pinion 10 is provided with a forward rotation drum 20, a speed change gear 24 and a drive wheel 28, and the other side thereof. Reverse rotation drum 2
0 ', the transmission gear 24' and the drive wheel 28 'are respectively arranged in parallel.

Then, both transmission gears 24, 24 '
Are engaged with the pinion 10, and both drive wheels 28 and 28 'are engaged with the main gear 29.

As the control motor M, a servo motor or a spindle motor, preferably, an AC servo motor which has a large overload capacity and a large instantaneous maximum torque and is economical is used.

The gear ratio is configured such that the output of the control motor M is transmitted to the transmission gears 24, 24 'at a reduction ratio of 2 to 5.

Next, FIG. 2 shows a cross section taken along line AA in FIG.

As is apparent from FIG. 2, two support shafts 41 and 41 'are fixed inside the housing 40 in parallel with the output shaft 70.
Reference numerals 0 and 20 'are rotatably provided at one end of the support shafts 41 and 41' via radial ball bearings R1 and R1, respectively. The drive wheels 28 and 28 'are provided at other ends with radial ball bearings R2 and R2, respectively. It is provided rotatably via the.

The transmission gears 24, 24 'are rotatably provided on both drums 20, 20' via radial ball bearings R3, respectively, and both gears 24, 24 '.
Are engaged with the pinion 10 as described above (see FIG. 1).

The pinion 10 is fitted on a rotating shaft 11 supported by radial ball bearings R4 and R4. A pulley 12 is fitted on the tip of the rotating shaft 11, and the pulley 12 A pulley 13 fitted to the drive shaft of the control motor M is linked via a timing belt t.

The forward and reverse rotation drums 20, 2
0 ', coils C, C' having winding directions opposite to each other are provided between the transmission gears 24, 24 'and the drive wheels 28, 28' on the outer periphery thereof. , 24 ′ and the other end to drive wheels 28, 2.
8 '.

The forward and reverse rotation drums 20, 20 '
Has a surface hardened by carburizing or induction hardening.

On the other hand, the coils C and C 'are windings having a rectangular cross section formed by heat treatment such as quenching and tempering. The winding direction is such that the coil C on the forward rotation drum 20 side is left-handed, and The coil C 'on the 20' side is right-handed.

The coils C and C 'have a larger number of windings than the coil C' on the forward rotation drum 20 'compared with the coil C' on the reverse rotation drum 20 '.

This is because a large output is required when the output shaft 70 rotates in the normal direction, and the coil C of the normal rotation drum 20 is used for the normal rotation.

That is, as is clear from the above equation, if the number of turns n of the coil is increased, the transmission torque can be increased in proportion to this.

The coils C, C 'are formed so as to be thicker on the drive wheels 28, 28' side and thinner on the transmission gears 24, 24 'side.

As a result, a larger force acts on the other end of the coils C, C ', ie, on the drive wheels 28, 28' side, than on one end of the coils C, C ', ie, on the side of the transmission gears 24, 24'. By doing so, the coils C,
The load acting on an arbitrary cross section of C 'is made constant.

The coils C and C 'are rotated by chucking, for example, cylindrical carbon steel as a material on an NC lathe, and feeding a predetermined tool while sequentially increasing or decreasing the feed pitch. Then cut a spiral groove in this material, and then boring the material using a tool such as a boring tool to penetrate the groove, and then,
It is manufactured by subjecting it to heat treatment such as quenching and tempering.

Next, as shown in this figure, the output shaft 70 passes through the center of the housing 40, and the flywheel 50 is connected to one end of the output shaft 70 via radial ball bearings R5 and R5. This is directly rotatable in the housing 40, and is engaged with the forward rotation drum 20 in an idle gear (not shown) with the reverse rotation drum 20 '.
Are meshed through.

At a substantially center of the output shaft 70, a main gear 29 is fixed by a key or the like, and drive wheels 28 and 28 'mesh with the main gear 29.

The flywheel 50 is rotatably supported by a slide bearing S1 fitted to the housing 40, and is always rotated in a fixed direction by a motor described later.

On the other hand, another output shaft 70 'is orthogonal to the other end of the output shaft 70 via bevel gears G, G.

The one output shaft 70 is connected to the housing 40
, And the other output shaft 70 'is supported by a slide bearing S3 fitted to the housing 40, and the ends of both output shafts 70, 70' are It is projected outside so that it can be connected to the required device.

Next, the operation of the power transmission device will be described. When the flywheel 50 is rotated in the direction of the arrow, the forward / reverse rotation drums 20 and 20 'meshing with the flywheel 50 are driven. Each will rotate in the opposite direction.

In particular, the forward rotation drum 20 not passing through the idle gear rotates in the opposite direction to the flywheel 50,
The reverse rotation drum 20 ′ via the idle gear rotates in the same direction as the flywheel 50.

Then, when the control motor M is driven in the direction of the arrow, the transmission gears 24, 2 are driven via the timing belt t, the pulleys 13, 12, the rotating shaft 11, and the pinion 10.
4 'begins to rotate in the opposite direction to flywheel 50.

Then, one of the coils C is wound around the forward rotation drum 20 to rotate the drive wheel 28 in a direction opposite to that of the flywheel 50, so that the main gear 2 meshed with the drive wheel 28
9 rotates in the rotation direction of the flywheel 50, and the output shaft 70 also rotates in the same direction, that is, rotates forward.

At this time, the other coil C '
The drive wheel 2 whose one end is pushed by the transmission gear 24 ′ and the other end is rotated by the main gear 29
8 'so that the reverse rotation drum 2
It does not wrap around 0 '.

When the drive wheel 28 attempts to exceed the rotational speed of the transmission gear 24 due to its inertia, the other drive wheel 28 'rotated via the main gear 29 rotates at a higher speed than the transmission gear 24'. At this time, the coil C 'is wound around the reverse rotation drum 20' and acts so as to brake the drive wheel 28.

Therefore, the drive wheels 28, 2 are provided with respect to the transmission gears 24, 24 'rotated by the control motor M.
Since the motor 8 'rotates instantaneously at the same speed, the output shaft 70 also appropriately performs a definite motion proportional to the operation amount of the control motor M.

Therefore, the displacement and speed of the drive system driven by the power transmission device are fed back as digital signals to the control motor M, and if the rotation speed of the control motor M is appropriately changed, the The output shaft 70 responds at high speed.

When the output shaft 70 is to be rotated in the reverse direction, the control motor M may be driven in the direction opposite to that described above, and at that time, the coils C and C 'perform the reverse operation.

On the other hand, when the control motor M is stopped during the normal rotation of the output shaft 70, the power transmission to the main gear 29 by the drive wheel 28 is cut off, while the other drive wheel 28 is driven by the inertia force of the main gear 29. ′ Is rotated, and one end of the coil C ′ is pulled by the drive wheel 28 ′. Thus, the reversing drum 20 ′ rotates the coil C ′ to the opposite side of the drive wheel 28 ′.
, The main gear 29 stops immediately, and the output shaft 70 also stops.

The output shaft 70 during reverse rotation also stops immediately in response to the stop operation of the control motor M.

In short, when the control motor M is driven in the direction of rotation of the flywheel 50, the output shaft 70 also rotates in the same direction (forward rotation).
When the control motor M is stopped, the output shaft 70 that is rotating forward or reverse is instantaneously stopped.

Of course, if the winding directions of the coils C and C 'are changed, the output shaft 70 is reversed on the forward rotation drum 20 side and the output shaft 70 is normally rotated on the reverse rotation drum 20' side. Needless to say,

Next, a second embodiment of the present invention will be described.
FIG. 3 is a schematic front view thereof, in which reference numeral 30 denotes a ring gear, 32 denotes a sun gear, and 34 denotes a planetary gear.

This embodiment is characterized in that a planetary gear mechanism comprising a ring gear 30, a sun gear 32 and a planetary gear 34 is provided in place of the main gear of the first embodiment, and is common to the first embodiment. Only the different parts are shown in the figure, and the different parts will be described in detail below.

As shown in FIG.
8, 28 'mesh with the outer circumferential surface of the ring gear 30, and the planet gears 34,... Mesh with the inner circumferential surface of the ring gear 30 and the sun gear 32.

Next, FIG. 4 shows a cross section taken along line BB in FIG.

As clearly shown in this figure, an input shaft 60 passes through the center of the housing 40, and the flywheel 50 rotates at one end of the input shaft 60 via radial ball bearings R5 and R5. It is provided freely.

A clutch disc d is fixed to one end of the input shaft 60, and a main body of a clutch including the clutch disc d, for example, an electromagnetic clutch E with a brake device shown is fixed to the flywheel 50. The flywheel 50 is turned on and off by the operation of the electromagnetic clutch E.
Is transmitted to the planetary gear mechanism via the input shaft 60.

This planetary gear mechanism comprises a ring gear 30, a sun gear 32, a planetary gear 34,... As described above, and the ring gear 30 is rotatable at the other end of the input shaft 60 via radial ball bearings R6, R6. The sun gear 32 is fitted and fixed to the other end of the input shaft 60, and the planetary gears 34,... Are disposed between the ring gear 30 and the sun gear 32 to mesh with the ring gear 30 and the sun gear 32. ing.

On the other hand, an output shaft 70 concentric with the input shaft 60 is disposed in the axial direction of the input shaft 60, and another output shaft 70 'is connected to the output shaft 70 via bevel gears G, G. Are orthogonal.

The output shaft 7 which is concentric with the input shaft 60
A rotating disk 80 is fixed to one end of the rotating gear 80, and bosses 81,... Protruding from the rotating disk 80 are fitted into the planetary gears 34,.

The other end of the input shaft 60 is supported by a radial ball bearing R7 fitted to the turntable 80.

Next, the operating state of the power transmission device will be described. If the flywheel 50 is rotated in the direction of the arrow with the electromagnetic clutch E engaged, the normal rotation The reverse rotation drums 20 and 20 ′ rotate forward and backward, respectively, while the power of the flywheel 50 is transmitted to the sun gear 32 via the input shaft 60.

Then, when the control motor M is driven in the direction of the arrow, the speed change gears 24, 2 are driven via the timing belt t, the pulleys 13, 12, the rotating shaft 11, and the pinion 10.
4 'begins to rotate in the opposite direction to flywheel 50.

Then, one of the coils C is wound around the forward rotation drum 20 to rotate the drive wheel 28 in the direction opposite to the flywheel 50, so that the ring gear 3 meshing with the drive wheel 28
0 is rotated in the direction of rotation of the flywheel 50 and thus the planetary gears 34,...
Is increased.

Since the turning motion of the planetary gears 34 is transmitted to the output shaft 70 via the rotary disk 80, the output shaft 70 is synchronized with the turning motion of the planetary gears 34. Rotate in the same direction.

At this time, the other coil C '
The drive wheel 2 whose one end is pushed by the transmission gear 24 'and the other end is rotated by the ring gear 30
8 'so that the reverse rotation drum 2
It does not wrap around 0 '.

When the drive wheel 28 attempts to exceed the rotational speed of the transmission gear 24 due to its inertia, the other drive wheel 28 'rotated via the ring gear 30 rotates at a higher speed than the transmission gear 24'. At this time, the coil C 'is wound around the reverse rotation drum 20' and acts so as to brake the drive wheel 28.

Therefore, the drive wheels 28, 2 'are provided to the transmission gears 24, 24' rotated by the control motor M.
Since the motor 8 'rotates instantaneously at the same speed, the output shaft 70 also appropriately performs a definite motion proportional to the operation amount of the control motor M.

Therefore, the displacement and speed of the drive system driven by the power transmission device are fed back as digital signals to the control motor M, and if the rotation speed of the control motor M is changed accordingly, the The output shaft 70 responds at high speed.

If the ring gear 30 is rotated at the same speed in the direction of rotation of the sun gear 32, the output shaft 70 rotates at the same speed and in the same direction as the input shaft 60, and has a lower speed than the sun gear 32. The output shaft 70 decelerates with respect to the input shaft 60, and conversely, the sun gear 32
If the rotation is performed at a higher speed, the output shaft 70 increases in speed with respect to the input shaft 60.

On the other hand, when the ring gear 30 is rotated in the opposite direction to the sun gear 32, the rotation speed of the output shaft 70 is further reduced with respect to the input shaft 60. In particular, the negative rotation speed of the ring gear 30 When the rotation speed of
The turning motion of the planetary gears 34,... Stops, and the output shaft 70 stops.

When the negative rotation speed of the ring gear 30 exceeds the positive rotation speed of the sun gear 32, the planetary gears 34,
... are in the opposite direction, that is, the flywheel 50 and the input shaft 60
Starts a turning motion in the direction opposite to the rotation direction of the output shaft 70. Thus, the output shaft 70 starts to reverse.

However, reversing the output shaft 70 by rotating the ring gear 30 in the opposite direction to the sun gear 32 and at a speed higher than the sun gear 32 is a waste of power consumption, and the response of the output shaft 70 Therefore, the reverse rotation control of the output shaft 70 in practical use is performed with the electromagnetic clutch E disengaged.

That is, when the flywheel 50 is rotated in the direction of the arrow with the electromagnetic clutch E disengaged, the power is transmitted only to the forward / reverse rotation drums 20 and 20 'meshing with the flywheel 50. Become like

Then, when the control motor M is driven in the direction opposite to the arrow, the transmission gears 24 and 24 ′ are transmitted via the timing belt t, the pulley 12, the rotating shaft 11 and the pinion 10.
Starts to rotate in the same direction as the flywheel 50.

Then, one coil C 'is wound around the reverse rotation drum 20' to rotate the drive wheel 28 'in the same direction as the flywheel 50, so that the ring gear 30 meshing with the drive wheel 28' The flywheel 50 is rotated in a direction opposite to the rotation direction.

Since the sun gear 32 is in a stopped state at this time, the planetary gears 34,.
In conjunction with 0, the rotation starts in the rotation direction of the ring gear 30.

Therefore, the output shaft 70 is connected to the planetary gears 34,.
・ In the same direction, that is, in reverse, in synchronization with the turning motion.

When the control motor M is stopped during the reverse rotation of the output shaft 70, the transmission of power to the ring gear 30 by the drive wheel 28 'is cut off, while the other drive wheel 28 is driven by the inertia of the ring gear 30. Is rotated, and one end of the coil C is pulled by the drive wheel 28. Thus, the coil C rapidly winds around the forward rotation drum 20 rotating on the opposite side of the drive wheel 28, so that the ring gear 30 stops. Then, the output shaft 70 also stops.

On the other hand, in the stop control at the time of normal rotation of the output shaft 70, the electromagnetic clutch E is disengaged first, and then the control motor M is stopped.

Then, the transmission of power to the ring gear 30 by the drive wheel 28 is cut off, while the other drive wheel 28 'is rotated by the inertia force of the ring gear 30, and the drive wheel 28' rotates the coil C '. One end is pulled, thus the coil C '
Is rapidly wrapped around the reverse rotation drum 20 'rotating on the opposite side of the drive wheel 28', so that the ring gear 30 stops and, consequently, the output shaft 70 also stops.

Next, a third embodiment of the present invention will be described.
FIG. 5 is a schematic front view thereof, and reference numeral 10 'in the figure is a pinion.

This embodiment is an extension of the power transmission device of the second embodiment, in which a plurality of forward / reverse rotation drums,
It is characterized by being equipped one by one.

In the figure, reference numerals 20 and 20 denote drums for normal rotation.
Reference numerals 20 'and 20' denote drums for reverse rotation.

As shown in FIG.
Are opposed with respect to the pinion 10 ', and the other reverse rotation drums 20', 20 'are also opposed with respect to the pinion 10'.

Of course, the forward rotation drums 20, 20 are provided with transmission gears 24, 24, respectively, and drive wheels 28, 28 are provided opposite thereto.

The reverse rotation drums 20 ', 20' are also provided with transmission gears 24 ', 24', respectively, and opposed thereto, drive wheels 28 ', 2', respectively.
8 'is provided.

Each of the transmission gears 24, 24, 24 ',
The pinion 10 'meshes with 24'.

As shown in FIG. 6, the pinion 10 'is rotatably provided on the input shaft 60 via radial ball bearings R8, R8.

The pinion 10 'has a gear r on one side and a pulley r' on the other. The transmission gears 24, 24, 24 ', 24' mesh with the gear r as described above. The pulley r 'is connected to the control motor M via a timing belt t.

As described above, in this embodiment, since a plurality of forward rotation drums 20, 20 and reverse rotation drums 20 ', 20' are provided, the power transmission capacity to each of the drums 20, 20 'can be reduced. it can.

Accordingly, the heat generated by the circulating oil is suppressed, so that the pulling force of the drive wheels 28, 28 'by the coils C, C' is stabilized, and the speed accuracy of the output shaft 70 is further improved. Become like

A gear may be used as a means for connecting the pinion 10 'and the control motor M.

This embodiment can be used together with the power transmission device of the first embodiment.

Next, FIG. 7 shows a state of use of the power transmission device of the present invention.

As is apparent from this figure, external power, for example, the power of the illustrated motor m is transmitted to the flywheel 50 via the timing belt t '.

A symbol P in the figure denotes a screw press as an industrial machine driven by the power transmission device, and a gear Gb fitted on a screw Sc for moving the ram R of the screw press P up and down. And a gear Ga fitted on the output shaft 70 'of the power transmission device of the present application.

Thus, the screw press P is driven by the power transmission device of the present invention, and the drive control of the ram R is performed by, for example, feeding back the displacement amount and the elevating speed of the ram R to the control motor M.

[0115]

(1) The power transmission device of the present invention transmits the rotational motion of the forward / reverse rotation drum rotated by the flywheel to the drive wheel using the winding effect of the coil, and the drive wheel transmits the rotational motion. Since the output shaft is driven, there is an excellent effect that the large rotational energy stored in the flywheel can be efficiently transmitted to the output shaft.

(2) When one of the coils is wound around the drum to rotate the drive wheel, and the drive wheel tries to exceed the operation amount of the control motor, the other coil is wound around the opposite drum. Since the movement of the drive wheel is braked, the output shaft performs a definite movement in proportion to the operation amount of the control motor, and has an excellent effect of exhibiting extremely high speed accuracy.

(3) If the control motor is stopped,
One of the coils rapidly winds around the forward or reverse rotation drum and stops the drive wheel, so that the output shaft has an excellent effect of exhibiting extremely high stopping accuracy.

(4) Further, since the power transmission device of the present invention can obtain an extremely large output, a high speed accuracy, and a stop accuracy as described above, it is possible to drive an industrial machine requiring an output of 200 to 500 kW. It has an excellent effect that it can be sufficiently controlled.

(5) In particular, due to the high-speed response and the speed performance exhibited by the output shaft, the excellent effects of improving the function of the industrial machine, particularly the formability, and reducing noise and vibration can be obtained.

(6) Since the forward and reverse rotation drums are arranged in parallel, there is an excellent effect that the size of the apparatus can be reduced.

(7) According to the power transmission device according to the second and third aspects of the present invention, the large rotational energy stored in the flywheel is transmitted to the sun gear via the clutch, and at the same time, the rotation is performed by the flywheel. The rotational motion of the forward / reverse rotation drum is transmitted to the drive wheel using the winding effect of the coil, and the planetary gear is turned by the ring gear rotated by the drive wheel and the sun gear, and the planet By transmitting the power of the flywheel to the output shaft via gears, the power transmission capacity to the coil can be reduced,
The effect of reducing the fluctuation of the frictional resistance between the coil and the drum due to the heat generation of the oil and the like and obtaining an exceptional speed accuracy is achieved.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a schematic front view showing a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a schematic front view showing a third embodiment of the present invention.

FIG. 6 is an enlarged view of a main part in a section taken along line XX shown in FIG. 5;

FIG. 7 is a side view showing a use state of the power transmission device of the present invention.

[Explanation of symbols]

 C, C 'Coil E Electromagnetic clutch M Control motor G, G Bevel gear m Motor 20 Forward rotation drum 20' Reverse rotation drum 24, 24 'Transmission gear 28, 28' Drive wheel 29 Main gear 30 Ring gear 32 Sun gear 34 Planetary gear 41, 41 'support shaft 50 flywheel 60 input shaft 70, 70' output shaft

Claims (3)

(57) [Claims] 1. A flywheel to which external power is transmitted, a forward / reverse rotation drum arranged in parallel to receive power of the flywheel and rotate in opposite directions to each other, and both drums A coil mounted on the outer periphery of the coil and having a winding direction opposite to each other, a transmission gear driven by a control motor that is locked at one end and that can rotate forward and reverse, and the other end of the coil are connected. A power transmission device including a drive wheel stopped and an output shaft driven by the drive wheel. 2. A flywheel to which external power is transmitted, a planetary gear mechanism including a sun gear to which power of the flywheel is transmitted via a clutch, and a flywheel to which power of the flywheel is transmitted and opposite to each other. A forward / reverse rotation drum arranged in parallel for rotation, a coil mounted on the outer periphery of both drums, the winding directions of which are opposite to each other, and one end of the coil is locked and forward / reverse rotation is performed. A transmission gear driven by a control motor capable of being driven; a drive wheel having the other end of the coil locked and connected to a ring gear of the planetary gear mechanism; and an output shaft connected to a planetary gear of the planetary gear mechanism. A power transmission device comprising: 3. A flywheel rotatably provided at one end of an input shaft, a motor for transmitting power to the flywheel, a clutch for transmitting power of the flywheel to the input shaft, A planetary gear mechanism including a sun gear provided at one end; and a parallel form in which the power of the flywheel is provided rotatably at one end of a support shaft parallel to the input shaft and the power of the flywheel is transmitted to rotate in opposite directions. A forward / reverse rotation drum disposed, a transmission gear rotatably provided on both drums and driven by a control motor capable of forward / reverse rotation, and a rotatable gear provided at the other end of the support shaft, respectively. A drive wheel connected to the ring gear of the planetary gear mechanism; and a drive wheel mounted on the outer periphery of the two drums, one end of the drive gear and the other end of the drive gear. A power transmission device comprising: coils that are wound and locked in mutually opposite winding directions, and an output shaft that is connected to a planetary gear of the planetary gear mechanism.