JPH0356684Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an energy storage device that stores energy by utilizing the elastic deformation of an elastic body. The present invention relates to an energy storage device that gradually expands its strain region.

[Prior Art] An energy storage device that stores energy using elastic deformation of an elastic body is disclosed in Japanese Patent Laid-Open No. 49-96144. The device disclosed in this publication has two drums, and an elastic body is stretched between the two drums, so that the two drums rotate in the same direction.

In the energy storage device shown in the above-mentioned Japanese Patent Application Publication No. 49-96144, if the initial strain η of the elastic body wound around the small diameter drum is 0, the energy at the time of output is 0, and the efficiency is 0%. . Therefore, when an elastic body with low elastic elongation is used, there is a problem in that sufficient initial strain cannot be imparted, so that the energy at the time of output becomes almost zero.

Therefore, in order to solve these problems, we developed a method in which a part of the elastic body is distorted by a large fixed amount and the area is gradually expanded. An energy storage device has been proposed that can efficiently input and output energy even under conditions of
61-168033).

In this energy storage device, an intermediate drum is disposed between the first drum and the second drum, and the intermediate drum and the second drum are connected by once wrapping an elastic material around the intermediate drum. The strain of the elastic body between the drum and the drum can be made larger than the initial strain, and even if the initial strain of the elastic body is 0, energy can be extracted efficiently.

[Problems to be solved by the invention] The energy storage device of the above-mentioned patent application No. 168033/1980 has a function to control the rotational speed of each drum and a function to control the rotation speed of each drum from the completion of energy input to the time of energy output. The method of retention is not disclosed. In other words, the energy storage device requires a measure against drum runaway and a function to temporarily hold the drum when switching between energy input and output. Without this function, it will not be possible to obtain the required energy output characteristics, and it will not be possible to cope with frequent energy input and output.

The present invention focuses on the above-mentioned points, and aims to provide an energy storage device that can suppress the rotational speed of the drum to an appropriate rotational speed and can cope with frequent input and output of energy. shall be.

[Means for Solving the Problems] The energy storage device of the present invention that meets this objective comprises a first drum, a second drum, and a first drum, which are juxtaposed to each other and are rotatable about their axes.
a third drum consisting of an intermediate drum disposed between the drum and the second drum; b a first portion wound around the first drum; and a second portion wound around the second drum; , a third part that is wound around a third drum, and a fourth part that connects each drum, the end of the first part being fixed to the first drum, and the second part being wound around the third drum. a string-like elastic body, the end of which is fixed to the second drum; c the first drum, the second drum, and the third drum;
means for connecting the third drum so that the outer circumferential rotation amount of the drum is larger than the outer circumferential rotation amount of the third drum, and the outer circumferential rotation amount of the third drum is larger than the outer circumferential rotation amount of the first drum. an energy storage device, wherein any one of the drums has a
An input/output switching mechanism that switches energy input and output is interlocked, and a speed governor that expands and contracts in the direction of the rotation axis due to centrifugal force caused by the rotation of the drum is attached to the drum. A brake device that brakes the rotation of the drum according to the expansion and contraction of the gear is connected, and the brake device and the input/output switching mechanism are connected when the input/output switching mechanism is in a neutral state where input and output of energy are stopped. It consists of a brake system that is interlocked to operate only the brake system.

[Function] In the energy storage device configured as described above, when energy is stored, the amount of winding of the first portion of the elastic body around the first drum decreases, and the amount of winding of the second portion of the elastic body around the second drum decreases. The amount of wrapping around increases. At the time of energy release, the amount of wrapping of the second portion of the elastic body around the second drum decreases, and the amount of wrapping of the first portion of the elastic body around the first drum increases. The amount of winding on the third drum does not change, and only the winding position moves on the drum in accordance with the accumulation and release of energy.

During energy storage, when the elastic body is wound around the second drum from the first drum through the third drum, the amount of outer circumferential rotation of the third drum is greater than the amount of outer circumferential rotation of the first drum. Since the amount of outer circumferential rotation of the second drum is larger than the amount of outer circumferential rotation of the third drum, the fourth portion of the elastic body connecting the drums is stretched, and tension is generated in this fourth portion. energy is accumulated, and the wire is wound around the third drum with tensile strain. Next, the fourth portion connecting the third drum and the second drum is further stretched, the strain in this portion increases, and the fourth portion is wound around the second drum with increased energy.

During energy regeneration, an action opposite to that during storage occurs, and when the elastic body wrapped around the second drum in a state of large tensile strain is wound around the third drum, the outer circumferences of the second and third drums rotate. It is wound around the third drum with the tensile strain reduced by an amount corresponding to the difference in amount. Subsequently, the tensile strain of the elastic body that leaves the third drum decreases by an amount corresponding to the difference in the outer peripheral rotation amount of the first drum and the third drum, and becomes the same size as the initial strain. 1 drum.

In this case, when the rotation speed of each drum increases significantly during energy regeneration, the adjuster attached to the drum contracts in the direction of the rotation axis due to centrifugal force, thereby operating the brake device. Therefore, the rotational speed of each drum is reduced, and the rotational speed of each drum is moderately suppressed.

In addition, the brake device is linked so that it operates only when the input/output switching mechanism is in a neutral state where energy input and output are stopped, so even if the input/output switching mechanism is activated frequently, the brake device will not operate. The rotation of each drum is quickly stopped each time energy is input or output is switched.

[Embodiments] Hereinafter, preferred embodiments of the energy storage device according to the present invention will be described with reference to the drawings.

1 to 3 show an energy storage device according to an embodiment of the present invention. In the figure, the energy storage device 20 includes a first drum 22 and a second drum 24 which are arranged in parallel and are rotatable about their respective axes and have different diameters, and a first drum 22 and a second drum 24 that are rotatable about their respective axes. 24 has a third drum (intermediate drum) 23 having a diameter intermediate between the diameters of the two drums. A string-like elastic body 25 is spirally wound around the first drum 22 and the second drum 24 via the third drum 23.

The elastic body 25 has a first portion 25a that is spirally wound in close contact with the first drum 22.
and a second portion 25e that is attached to the second drum 24 and wound in a spiral shape, and a second portion 25e that is wound around the third drum 23 between the first drum 22 and the second drum 24 once or twice. third part 25
c, and fourth portions 25b and 25d that connect between each drum. The first part 25a, the fourth part 25b, the third part 25c, the fourth part 25d, and the second part 25e are connected in series in the order of 25a, 25b, 25c, 25d, and 25e. continuous in shape. An end 25a' of the first part 25a is fixed to the first drum 22, and an end 25e' of the second part 25e is fixed to the second drum 24.

The first drum 22, the second drum 24 and the third drum
The drum 23 is connected to connecting gears 28a, 28b, 28
They are connected via means 28 consisting of c. The means 28 includes a first drum 22 and a third drum 23.
and the second drum 24, the outer circumferential rotation amount of the second drum 24 (the circumferential movement distance of an arbitrary point located on the outer circumference when the drum rotates is defined as the outer circumferential rotation amount) is the same as that of the third drum 23. They are mechanically connected to each other so that the amount of rotation of the outer periphery of the third drum 23 is greater than the amount of rotation of the outer periphery of the first drum 22 . In this case, during energy storage, the amount of wrapping of the elastic body 25 on the second drum 24 increases, the amount of wrapping on the first drum 22 decreases, and the amount of wrapping on the third drum 23 remains unchanged. Only the position at which the elastic body 25 is wound changes. When the energy is released, the amount of the elastic body 25 wrapped around the first drum 22 increases, and the amount of the elastic body 25 wrapped around the second drum 24 decreases.

The main parts have been described above, and the detailed technical explanation of the configuration is as follows. Elastic body 25
The first portion 25a of the elastic body 25 is in direct contact with the outer periphery of the first drum 22, and the second portion 25a of the elastic body 25 is in direct contact with the outer periphery of the first drum 22.
e is in direct contact with the outer periphery of the second drum 24. Further, the third portion 25c is also connected to the third drum 23.
are in direct contact with. Therefore, a frictional force acts between the elastic body 25 and the first drum 22, second drum 24, and third drum 23 to prevent relative displacement in the circumferential direction, and the fourth portion 25b of the elastic body 25 ,25
Even if elongation occurs in d, the tensile strain is the elastic body 25
does not propagate over the entire length of , and almost the fourth part 2
It is limited to only 5b and 25d. The direction in which the first portion 25a of the elastic body 25 is wound around the first drum 22 and the direction in which the third portion 25c of the elastic body 25 is wound around the third drum 23 are shown in FIGS. They are opposite to each other as shown in the figure. Further, the direction in which the third portion 25c of the elastic body 25 is wound around the second drum 24 and the direction in which the second portion 25e of the elastic body 25 is wound around the second drum 24 are opposite to each other. Also, the first
The drum 22, the third drum 23, and the second drum 24 are connected by means 28 so as to rotate in opposite directions at a constant rotation rate. The fourth portions 25b, 25d of the elastic body 25 pass through the spaces between each drum.

In FIG. 3, when a tension force F is applied on the second drum 24 during energy storage, the first drum 22 and the third drum 23, connected by means 28, rotate in the direction of the arrow. At this time, the first drum 22
R1 is the radius of R1, R2 is the radius of the third drum 23, R3 is the radius of the second drum 24, and the number of teeth of the connecting gears 28a, 28b, 28c of the means 28 is the same, and the relationship R1<R2<R3 is established. When the outer circumferential rotation amount is increased in the order of the first drum 22, the third drum 23, and the second drum 24, the fourth portions 25b and 25d of the elastic body 25 are tensile according to the difference in the outer circumferential rotation amount. The stress increases, and energy is accumulated in the elastic body 25 from the first drum 25 to the second drum 24 in sequence.

Although the number of intermediate drums 23 is one in the illustrated example, it may be a combination of a plurality of drums arranged side by side. Further, in the figure, 26 indicates a bearing that rotatably supports a shaft connected to each drum, and 27 and 29 indicate support stands that support the drums.

In FIG. 1, numeral 30 indicates an input/output switching mechanism for switching between input and output of energy of the energy storage device. The input/output switching mechanism 30 includes an input/output shaft 31, a switching gear 34, and a moving means 40. The input/output shaft 31 is arranged to extend in the axial direction of each drum.
1 is rotatably supported around the axis by bearings 33 provided at both ends of an input/output shaft 31.

A switching gear 34 is fitted to the input/output shaft 31 . A fitting portion between the input/output shaft 31 and the switching gear 34 is splined. That is, the switching gear 34 is movable in the axial direction of the input/output shaft 31, and the switching gear 34 is movable in the axial direction of the input/output shaft 31.
It is now possible to engage with Therefore, when energy is input, input torque is transmitted from the input/output shaft 31 to the input torque switching gear 34, and conversely, when energy is regenerated, output torque is transmitted from the switching gear 34 to the input shaft 31. This switching gear 34 is connected to the moving means 40
The input/output shaft 31 is moved by the input/output shaft 31. For example, the switching gear 34 meshes with the connecting gear 28a of the second drum 24 when energy is input, and meshes with the gear 32 juxtaposed with the connecting gear 28b connected to the third drum 23, for example, when outputting energy. There is.

A speed governor 35 is provided on one side of the connecting gear 28a of the second drum 24 to adjust the rotational speed of each drum. The speed governor 35 is connected to the fixed part 3
5a, a sliding part 35b, a link part 35c, and a weight 35d. The fixed part 35a is fixed to the connecting gear 28a side, and the sliding part 35b is arranged to face the fixed part 35a.
The fixed part 35a and the sliding part 35b are connected by a V-shaped link part 35c which is connected by a pin. A weight 35d is attached to the outside of the pin-coupled portion of the link portion 35c. A shaft 36 extending from the second drum 24 side to the speed governor 35 side is inserted through the fixed part 35a and the sliding part 35b.

A brake device 37 that brakes the rotation of each drum is connected to the speed governor 35. The brake device 37 includes a truncated conical brake drum 37a and a brake lining 37b fixed to the supports 27 and 29. The sliding portion 35b of the speed governor 35 is connected to the brake drum 37a, and when the rotation speed of the second drum 24 becomes faster than the set speed, the sliding portion 35b of the speed governor 35 is moved by centrifugal force.
5b moves on the shaft 36 and presses the brake drum 37a against the brake lining 37b.

The brake device 37 is interlocked with the above-mentioned input/output switching mechanism 30 via a transmission means 38. The transmission means 38 includes a first lever 38a, a second lever 38b, a sliding portion 38c, and a spring 38d. The sliding portion 38c is arranged on one side of the brake drum 37a, and is slidably inserted into the shaft 36. The sliding portion 38c is biased by a spring 38d in a direction to press the brake drum 37a against the brake lining 37b. The first lever 38a is connected to the fulcrum 38
One side is connected to the sliding part 38c with a' as the center, and the other side is the moving means 40 of the input/output switching mechanism 30.
It is now possible to engage with Second lever 38b
, one side can come into contact with a portion of the first lever 38a that can be engaged with the moving means 40, and the other side can come into contact with the other side of the moving means 40 of the input/output switching mechanism 30, centering on the fulcrum 38b'. It is now possible to engage. That is, by moving the moving means 40 of the input/output switching mechanism 30 in the front and rear direction, the first lever 38a
rotates about the fulcrum 38a', and the sliding portion 38c moves on the shaft 36.

In the energy storage device configured in this way, when energy is input, the switching gear 34 is moved in the direction of arrow A by a moving means (not shown), and the switching gear 34 is engaged with the connecting gear 28a of the second drum 24. be done. In this case, the other side of the first lever 38a engages with one side of the switching gear 34, and the first lever 38a is rotated around the fulcrum 38a', so that the slide connected to the first lever 38a is rotated. The moving part 38c is moved in the direction away from the brake drum 37a, and the brake is released. Therefore, each drum is rotated by the input torque from the input/output shaft 31.

When the input of energy is stopped, the switching gear 34 is returned to the neutral position, and the engagement between the switching gear 34 and the connecting gear 28a is released. As a result, the first lever 38a moves to the opposite side to the side at the time of input, and the brake drum 37a moves to the side where the spring 38d
The sliding portion 38c is urged against the brake lining 37b by the sliding portion 38c. Therefore, the rotation of each drum is stopped by the frictional force between the brake drum 37a and the brake lining 37b.

At the time of energy output, the switching gear 34 is moved in the direction of arrow B by the moving means 40, and the switching gear 34 is meshed with the gear 32 arranged in parallel with the connecting gear 28b of the third drum 23. In this case, the other of the second levers 38b engages with the switching gear 34, and one of the second levers 38b engages with the first lever 3.
8a. As a result, the first lever 38a is rotated about the fulcrum 38a', and the sliding portion 38c is moved away from the brake drum 37a in the same manner as described above. Therefore, the brake is released and the energy stored in the elastic body 25 is output from the input/output shaft 31.

During energy regeneration, if the rotational speed of each drum becomes abnormally high, the weight 35d of the speed governor 35 moves radially outward due to centrifugal force, and the length of the speed governor 35 in the rotation axis direction decreases. It can be shrunk. In other words, the sliding portion 35b is moved toward the second drum 24 side. As a result, the brake drums 37a connected to the sliding portion 35b are pressed against the brake lining 37b, and the rotational speed of each drum is reduced. Therefore, runaway of each drum is suppressed, and the rotational speed of each drum is maintained at an appropriate rotational speed.

[Effects of the invention] As explained above, when using the energy storage device of the invention, a speed governor that expands and contracts in the direction of the rotational axis due to the centrifugal force caused by the rotation of the drum is attached to the drum around which the elastic body is wound. A brake device that brakes the rotation of the drum according to the expansion and contraction of the speed governor is connected to the speed governor, and the brake device is linked to the energy input/output switching mechanism, so that each drum can be controlled easily during energy regeneration. Runaway is suppressed and the rotational speed of each drum can be maintained at an appropriate rotational speed, and energy is input.
When there is no output, the drum can be stopped quickly and reliably.

Therefore, an energy storage device that can sufficiently handle frequent energy input and output can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of an energy storage device according to an embodiment of the present invention, FIG. 2 is an overall perspective view of the energy storage device of the present invention, and FIG. 3 is a sectional view of the device of FIG. 2. . 20... Energy storage device, 22... First drum, 23... Third drum (intermediate drum),
24... Second drum, 25... Elastic body, 25a
...First part, 25b...Fourth part, 25c
...Third part, 25d...Fourth part, 25e
... Second part, 28 ... Means (connection gear), 3
0... Input/output switching mechanism, 31... Input/output axis, 34
...Switching gear, 35... Speed governor, 37... Brake device, 38... Transmission means.

Claims (1)

[Scope of utility model registration request] a third drum consisting of a first drum and a second drum and an intermediate drum disposed between the first drum and the second drum, which are juxtaposed to each other and are rotatable about their axes; ; a first portion wound around the first drum, a second portion wound around the second drum, a third portion wound around the third drum, and a distance between each drum; a string-like elastic body having a fourth connecting portion, an end of the first portion being fixed to the first drum, and a second end being fixed to the second drum; ; the first drum, the second drum, and the third drum, the outer circumferential rotation amount of the second drum is larger than the outer circumferential rotation amount of the third drum, and the outer circumferential rotation amount of the third drum; and means for connecting the first drum so that the amount of rotation is greater than the amount of rotation of the outer circumference of the first drum, the energy storage device switching energy input and output to any one of the drums. The input/output switching mechanism is interlockably connected, a speed governor is attached to the drum that expands and contracts in the direction of the rotation axis due to centrifugal force caused by the rotation of the drum, and the speed governor controls the speed of the drum according to the expansion and contraction of the speed governor. A brake device that brakes rotation is connected, and the brake device and the input/output switching mechanism are interlocked so that the brake device is operated only when the input/output switching mechanism is in a neutral state in which input and output of energy are stopped. An energy storage device characterized by: