JPH02102957A - Elastic energy accumulating device - Google Patents

Abstract

PURPOSE:To prevent overtightening of a resilient member even in case the number of turns in winding has varied in a resilient energy accumulating device using a cord-shaped resilient member by stretching over the resilient member between tapered drums forward and returned. CONSTITUTION:As a cord-shaped resilient member 20 is wound fast on two equally tapered drums 13, 14 several turns each in different positions, the speed is increased as the winding radius enlarges. When the number of turns on a major dia. drum 12 increases with progress of energy input, the wind-fast position of the resilient member 20 on each tapered drum 13, 14 shifts toward the major dia. portion with the aid of Geneva mechanisms 55, 56, when guide pulleys 43, 45 will move in synchronization with intermittent motion of a framing 32 to cause widening of the pitch between guide pulleys 34, 43 and between ones 43, 45, and the strain of the resilient member 20 is held at a specified value to achieve a stable characteristic with no change in the output efficiency, even in case the number of turns on the major dia. drum 12 has varied. Thus the energy input and output efficiencies can be enhanced while the whole device is constructed in small size.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention utilizes the elastic deformation of a string-like elastic body to store energy, subject a part of the elastic body to a large constant hanging strain, and expand the strain area. Regarding elastic energy storage devices that will be gradually expanded,
In particular, the present invention relates to an elastic energy storage device that can provide high energy input/output characteristics with a small number of drums.

[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 of this publication has two drums, and a string-like elastic body is passed between the two drums.
The two drums rotate in the same direction.

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

In order to solve this problem, the applicant previously proposed a method in which a part of the elastic body is distorted by a certain amount and the area is gradually enlarged. An energy storage device has been proposed that can efficiently output energy even when the initial strain is O when the wire is wound around the wire (Japanese Patent Application No. 61-168033).

The energy storage device of Japanese Patent Application No. 61-168033 has an intermediate outer periphery rotation between a small diameter drum 1 with a small outer periphery rotation amount and a large diameter drum 2 with a large outer periphery rotation amount, as shown in FIG. An intermediate drum 3 (there may be more than one) is provided, and a string-like elastic body 4 is provided between these drums 1, 2, 3.
This is what was given to him.

Each drum 1.2.3 is connected by a mechanical connection means 5, such as a gear, so that the amount of outer circumferential rotation increases in order from the small diameter drum side to the large diameter drum side, and the string-like elastic body 4 is connected to the small diameter drum. The elastic body 4 is stretched and its strain energy is stored by being wound from the first side to the large diameter drum 2 side, and the stored strain energy is released by being transferred from the first side to the large diameter drum 2 side.

In such an energy storage device, FIG.
Figure 6 shows a comparison between the conventional two-drum system (Figure 16) and the three-drum system (Figure 15) when drums with radii R1, R2, and R3 are connected using the same number of gears. As shown, by providing an intermediate drum, the energy person,
The output efficiency can be increased and output can be obtained even when the initial strain of the elastic body is O. It has been found that the output efficiency of this energy increases as the number of intermediate drums increases.

[Problem to be Solved by the Invention] In the energy storage device as described above, efficiency can be increased by increasing the number of intermediate drums as described above, but simply increasing the number of intermediate drums will not be proportional to the increase. However, there remains the problem that the overall size of the device increases.

In addition, since each intermediate drum is sequentially connected by a mechanical connection means, as the number of intermediate drums increases, the mechanical loss due to the mechanical connection means increases. Another problem is that the degree of improvement is small.

There are other issues that remain, such as the following:

In other words, in the energy storage device described above, in order to increase the total amount of energy output, the length of the elastic body is increased and the elastic body is layered on the drum (large diameter drum and small diameter drum). It is effective to wrap it around the

However, when the elastic body is wound in multiple layers on a drum,
Since the winding diameter changes, there is a risk that on a large diameter drum, as the number of wound layers increases, the elastic body may be pulled in too much, and on a small diameter drum, as the number of wound layers decreases, the elastic body may be insufficiently fed. That is, the tension (strain) of the elastic body changes due to changes in the winding layer, and the output torque characteristics change. especially,
When the number of winding layers increases on the large-diameter drum side, the elastic body may be stretched too much between adjacent intermediate drums, and there is a risk that the 1 to 1 torque balance between the drums cannot be maintained by simply forming the drums quickly.

One possible way to prevent this is to keep the strain level of the elastic body to a low level to prevent the strain from becoming too large even in the outermost layer of the multilayer winding. However, if this is done, the amount of strain in the elastic body on the inner layer side of the winding layer will be suppressed to a considerably small amount, so the amount of elastic energy that can be output will be small, and although it is possible to prevent the elastic body from being over-tensioned, the output characteristics of the device will be kept low. It ends up.

The present invention focuses on the above-mentioned problems, and in order to suppress the increase in the size of the entire device, increase energy output efficiency, and increase the total amount of stored energy, it is possible to easily employ multilayer winding of elastic bodies. Moreover, when multi-layer winding is adopted, the elastic energy storage device can prevent the elastic body from being over-tensioned even if the number of winding layers changes, and can also keep the strain of the elastic body constant during the elastic body transition process. For the purpose of providing.

[Means for Solving the Problems] The elastic energy storage device of the present invention that meets this objective includes a plurality of drums arranged so that their axes are parallel to each other, and a plurality of drums arranged in a manner such that the outer periphery of the plurality of drums is Connected by a mechanical connection means so that the amount of rotation is large and can be rotated in conjunction,
Between the drum with the minimum amount of outer circumferential rotation and the drum with the largest amount of outer circumferential rotation, the strain energy is stored by transferring between the outer circumferential surfaces of both drums via the outer circumferential surface of the intermediate drum. In an elastic energy storage device in which a string-like elastic body is stretched across the body, the intermediate drum is provided with at least two tapered drums each having a drum surface tapered in a direction along the drum axis; The elastic body is wound around the at least one tapered drum by reciprocating between the tapered drums so that the elastic body is wound at a plurality of positions along the drum axis.

When the elastic body is wound in multiple layers on the drum having the maximum outer circumferential rotation, the position of the elastic body wound on the upper surface of the tapered drum is movable in the direction along the drum axis. In addition, at this time, the intervals between the positions of multiple elastic bodies wound on the same tapered drum are adjusted so that the distance between the positions becomes larger as the position of the winding moves toward the larger diameter side on the taper drum. Means are provided.

[Function] In such a device, the elastic body is reciprocated and spanned between the tapered drums, and the elastic body is wound multiple times at positions with different diameters on the same taper drum, so that the above winding ends up depending on the position. The same energy and output efficiency as when the same number of intermediate drums are provided can be obtained, and high efficiency can be obtained with a small number of intermediate drums. Further, since the number of intermediate drums is small, the mechanical loss of the mechanical coupling means is also small, and efficiency is further improved from this point of view as well.

In addition, when the elastic body is wound in multiple layers on a drum with the maximum amount of outer circumference rotation, the position of the elastic body on the intermediate drum consisting of a tapered drum can be changed to correspond to the change in the number of winding layers. It becomes possible to keep the tension of the elastic body between the drums substantially constant, and over-tension etc. can be prevented.

Note that the rotational speed of the drum with the minimum amount of outer circumference rotation is changed by a transmission to eliminate excessive tension of the elastic body and insufficient feeding.

Furthermore, when changing the winding layer of the above-mentioned multi-layer winding (when changing the position of the elastic body on the tapered drum), as will be described later, if multiple windings are wound at the same interval, the position of the windings will be changed. Although the strain of the elastic body changes, it is possible to keep the strain of the elastic body constant by adjusting this interval using the interval adjustment means, and stable output efficiency can be obtained.

[Embodiments] Preferred embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIGS. 1 to 4 show an elastic energy storage device according to a first embodiment of the present invention. In the figure, reference numeral 11 indicates a small diameter drum as a drum with the minimum amount of outer circumference rotation, 12 indicates a large diameter drum as a drum with the maximum amount of outer circumference rotation, and 13 and 14 indicate intermediate drums. Although this embodiment is a four-drum type device that requires two intermediate drums, the number of intermediate drums is not limited to this.

The intermediate drums 13 and 14 are tapered drums whose surfaces are tapered in a direction along the drum axis. The intermediate drums 13 and 14 are tapered in the same direction, with the culm having a smaller diameter toward the right in FIG. 1 and increasing toward the left.

The axes 15, 16, 17, 18 of the plurality of drums are arranged parallel to each other (parallel to each other when viewed from above), and include the small diameter drum 11, the intermediate drum 13, and the intermediate drum 1.
4. The large-diameter drum 12 is connected to its arrangement by a mechanical connection means 19 so as to increase the amount of rotation of the outer periphery and to enable interlocking rotation. Small diameter drum 11 and large diameter drum 12
A string-like elastic body 20 is stretched between the drums 13 and 14, and the elastic body 20 is stretched back and forth between the taper drums 13 and 14 in the manner described in M1. The elastic body 20 is made of a material that can store strain energy therein by being stretched. When strain energy is stored in the elastic body 20, a portion 20a wrapped around the outer circumferential surface of the small diameter drum 11 is unwound, and the portion 20a wrapped around the intermediate drum is sequentially stretched to form the stretched elastic body. 20 is finally wound onto the outer peripheral surface of the large diameter drum 12 as a portion 20b. At the time of energy release, the elastic body 2G is moved in the opposite direction to the above.

The length of the elastic body 20 is such that it is wound in multiple layers on the outer peripheral surface of the small-diameter drum 11 before the above-mentioned strain energy is accumulated, and is wound in multiple layers on the outer peripheral surface of the large-diameter drum 12 after the strain energy is accumulated. It is set to a length that can be wrapped around. The figure shows only the winding state of the uppermost layer of the elastic body 20.

Among the mechanical coupling means 19, for coupling the large diameter drum 12 and the intermediate drum 13.14, a crank arm (or crank wheel) 2 provided at the end of the shaft 18 is used.
1.21', and a crank arm 23.23' linked thereto via a connecting rod 22.22-, a crank arm 24.24', a connecting rod 25.25', and a shaft 16.1.
Crank arm 26.26” installed at the end of 7,
27, 27', and the large-diameter drum 12 and intermediate drums 13, 14 rotate in synchronization at the same rotation speed. Intermediate drum 13 and small diameter drum 11
A gear mechanism 28 and a continuously variable transmission 29 are connected to each other, and by adjusting the increase/deceleration of the continuously variable transmission 29, the difference in rotational speed between the drums can be changed.

The elastic body 20 that is passed from the small diameter drum 11 to the large diameter drum 12 passes through guide pulleys 30 and 31, and then passes through a guide pulley 34 rotatably supported on a shaft 33 provided on a moving frame 32. , is wound around the small diameter side of the tapered outer circumferential surface of the tapered drum 13, and then wrapped around the guide pulley 34.
”, 35, 36, 37, 38-, and then wrapped around the small diameter side of the tapered outer peripheral surface of the tapered drum 14.

From there, guide pulley 38 on shaft 39, guide pulley 4
0.41.42, the elastic body 20 is wound again on the outer peripheral surface of the tapered drum 13 via the guide pulley 43 on the shaft 33.Similarly, the elastic body 20 is reciprocated multiple times between the tapered drums 13 and 14, and is arranged in parallel. Guide pulley 34.43.45, guide pulley 34", 43=, 45=, guide pulley 38=, 44", 46=, guide pulley 38.4
4.46, guide pulleys 35.36.37 and 40.
While being guided by guide pulleys 41 and 42 as shown in the figure, it is finally passed over the large diameter drum 12 from a guide pulley 46 through guide pulleys 47 and 48. Guide pulley 3
6.41 is supported via a spring 49.50 so that its position can be adjusted so that the length of the elastic body 20 can be adjusted. The guide pulley 31.47 is fixed on the frame 32,
It moves together with the frame 52.

The frame body 32 is movable along the support shafts 51 and 52 in the direction along the drum axis, and by using a threaded engagement between a nut 53 fixed on the frame body 32 and a threaded rod 54, The frame body 32 is moved by rotating the threaded rod 54. The threaded rod 54 that controls this movement is connected to the Geneva gear 55.56.
It is connected to the gear mechanism 28 via a gear mechanism 28, and the movement is performed intermittently via Geneva gears 55, 56 (Geneva mechanism). This intermittent movement is performed by rotating Geneva gears 55 and 56 (Geneva mechanism) by a gear mechanism 28 that rotates in conjunction with the large diameter drum 12. 20(7) The above-mentioned intermittent feeding is set to be performed at the moment when the volume F3 changes. By this intermittent feeding, each guide pulley on the frame body 32 is moved together with the frame body 32, so that the winding position of the elastic body 20 on each tapered drum changes, and the winding diameter changes.

The guide pulley 30 is provided with an elastic body tension sensor 57 that detects the tension of the elastic body 20.
The signal is sent to a clutch 59 that is connected to the gear mechanism 28 side and the adjustment mechanism section of the continuously variable transmission 29 via the microphone gear 58. The clutch 59 can adjust the increase/deceleration of the continuously variable transmission 1129 through its operation, and is controlled so that the detection signal from the elastic body tension sensor 57 is maintained at a constant value.

The small-diameter drum 11 and the large-diameter drum 12 are supported by a spline connection or the like to a shaft 15.18 so as to be movable along the axis while transmitting torque.

The small diameter drum 11 and the large diameter drum 12 are interlocked with a small diameter drum base 64 and a large diameter drum base 65 via thrust bearings 60.61 and 62.63.

Each of the small-diameter drum base 64 and the large-diameter drum base 65 is provided with an arm 66.67, and the arm 66.67 has a line extending in the direction along the drum axis.
A guide 72.73 is provided which is guided along a helical guide groove 70.71 of the bottle rod 68.69.

By guiding the guides 72.73 along the guides 70.71, the small diameter drum 11 and the large diameter drum 12 are reciprocated in the direction along the axis via the drum base 64.65, and this reciprocation The movement is gear 74.15 and 76
．． Since the elastic body 20 is interlocked with the rotation of each drum 11, 12 via the drum 77, the elastic body 20 is wound on the drum outer circumferential surface without any gaps or unwound in sequence, and the direction of the reciprocating motion changes to change the winding layer. is starting to change.

Reference numeral 78 in FIG. 1 indicates the output shaft of this device, through which energy is input and output via gears 79 and 80.

Next, guide pulleys 34, 43, supported within the frame 32.
The interval adjustment mechanism of 45, 38, 44, and 46 will be explained. For the guide pulleys 34', 43=, 45- and 38-44=, 4B'', the shafts 81.
The guide pulleys 34, 43, 4 are supported so as to be slidable on the guide pulleys 34, 43,
5 and 38.44.46.

As shown in FIG. 3, the guide pulleys 43.45 are rotatably supported independently on the shaft 33 via metal bearings 83.84. The guide pulley 34 is connected to the shaft 33
It is fixed to and is rotatable via bearings 85 and 86. The guide boo 943.45 is movable in a direction along the axis of the shaft 33 (direction B in the figure) along a slit 89 formed in the shaft 33 via a slider 87.88 as shown in FIG. It has become. The movement of the guide pulleys 43, 45 is performed in accordance with the rotation of the slide pin 90, and the thread pitch (large) between the slide pin 90 and the cap 91 and the thread between the slide pin 9G and the slide pin 92 are Due to the difference in pitch (small) between the guide pulley 45 and the guide pulley 43, the guide pulley 45 can move more in the B direction than the guide pulley 43. The slide pin 92 does not rotate due to a locking pin 94 attached to a cap 93, and moves only in the direction B along the locking pin 94. The slide pin 90 is a sprocket.
The sprocket 95 is rotated via a sprocket 95 mounted on the shaft 51 via a chain 96.
It is connected to 7. The sprocket 97 can move integrally with the frame 32 in the direction along the drum axis. A spiral groove 98 is carved in the shaft 51, and an engager 99 that engages with the groove 98 is provided on the inner peripheral side of the sprocket 97, so that the sprocket 97 and the frame 32 are attached to the shaft. When moved in the direction along the
The sprocket 91 is rotated by being guided along the spiral groove 98. This rotation causes the slide pin 90 to rotate as described above.

Substantially the same mechanism is provided on the guide pulley 38, 44, 46 side, and a sprocket 100, a chain 101, and a sprocket 102 are provided, and a helical groove 103 is carved in the shaft 52.

In the elastic energy storage device configured as described above, at the time of energy input, the elastic body 20 is initially wrapped around the outer peripheral surface of the small diameter drum 11.

8. When each drum is rotationally driven by the output shaft 78, person, and output gear 79.80, the elastic body 20 is unwound from the small diameter drum 11, and the elastic body 20 is unwound from the small diameter drum 11, and is wrapped around the intermediate drum 13.14 three times each. The elastic body 2G is transferred to the large-diameter drum 12 side, and the elastic body 2G with increased strain is sequentially wound on the outer peripheral surface of the large-diameter drum 12 between each drum.

There are only two tapered drums 13 and 14 as intermediate drums, but the elastic body 20 reciprocates three times between them, and the winding position is sequentially shifted to the larger diameter side on each of the same tapered drums. As shown in FIG. 5, the elastic body 20 is sequentially stretched as if six intermediate drums with roller radii of r2 to r7 were arranged (rl is the small diameter drum 11, r).

is a large diameter drum 12). With this increase in strain, the elastic body 20
As shown in FIG. 6, the tensions f1 to f7 are also increased sequentially between the two sides. Therefore, it is possible to input and output energy with extremely high efficiency even though there are only two intermediate drums.

Also, due to a change in the number of winding layers on the small diameter drum 11 side,
Although the tension of the elastic body 20 being unwound is about to change,
The tension of the elastic body 20 is detected by the tension sensor 57,
The signal is sent to the clutch 59, and the continuously variable transmission 29 is adjusted to increase or decrease the speed, thereby controlling the detected tension to be constant.

On the large-diameter drum 12 side, at the moment when the number of layers of the elastic body 20 on the large-diameter drum 12 increases, the frame body 32 is intermittently moved by the Geneva gears 55 and 56, and the elastic body 20 is moved in the left direction (toward direction) in FIG. ), and the winding diameter on the intermediate drum 13.14, which is a tapered drum, is also increased at the same time. As a result, the winding radius on the large diameter drum 12 is R
1. When the winding radius on the intermediate drum 14 is R2, (R1-R2)/R2 is kept constant, and changes in the tension of the elastic body 20 during this time are absorbed. Therefore, excessive tension of the elastic body 20 during this time is also prevented. The above control is
Since this is performed each time the number of layers of the elastic body 20 increases on the large-diameter drum 12, the energy input characteristics are stabilized.

During energy output, the operation is reverse to that described above, and each time the number of winding layers on the large-diameter drum 12 decreases, the elastic body 20 is intermittently sent to the right in the figure, and the intermediate drum 13.
The winding diameter on the drums 12 and 14 is changed to absorb tension changes between the drums 12 and 14, resulting in stable output characteristics.

Since the elastic body 20 is wound multiple times at different positions on the same tapered drum 13, 14, the speed of the elastic body 20 increases as the winding radius increases.

If each set of guide pulleys (for example, guide pulley 34.
43.45) When rotating within one body, elastic bodies with different speeds are wound around each other, which causes problems such as slipping of the elastic bodies, tension imbalance, and loss torque. In the example device, each guide pulley 34
．． 43 and 45 rotate independently, such a problem does not occur.

Then, as the energy input progresses and the number of winding layers on the large diameter drum 12 increases, the winding of the elastic body 20 on each tapered drum 13, 14 is shifted to the large diameter side via the Geneva mechanism as described above. However, at this time, the pitch between guide pulleys (for example, guide pulleys 34, 43 and 43
．． 45) remains constant.

In this case, the elastic body 20 is not stretched by a predetermined amount of strain, resulting in a decrease in tension and a decrease in output energy.

Therefore, in this device, in synchronization with the intermittent movement of the frame 32, the guide pulleys 43.45 are moved in the direction B in FIG. (Illustrated with a chain double-dashed line in the figure).

This change in pitch changes the length between each guide pulley by ro.
2ε/(tanα)+2ε.

Here, rO is the taper drum 1 as shown in FIG.
3 or 14, α is the taper angle, Y is the distance from the tapered drum pane to the first position where the elastic body is applied, and ε is the target elastic body strain between each drum. Taper drum 13
, the distance between the guide pulleys 34 and 43 is set to 1, the distance between the guide pulleys 43 and 45 is set to 2, and the winding radius at each position of the elastic body 20 is set as R2 and R2, respectively, using the model shown in FIG. Assuming R4 and R6, in order to achieve a predetermined elastic body strain amount 2ε between R2 and R4, (2πr4-2πr2)/(2πr2)= (ra-R
2)/r2=2ε (1).

Therefore, from equation (1) R4=, R2(1+2ε)(2) Similarly, r6=r2(1+4ε)(3) becomes.

Here, since r2=rg+etanα (4), (ro Juyu tanα) (1+2ε) − (rO+1 tan α)=Yu1 tan α (5). Therefore, tan1=(ro+tanα)2ε/tanα=ro2
ε/(tanα)+2εt (6), which is the same as the above equation.

Similarly, 12 = ro 2ε/ (tan a> +251
(7), and 11=12.

This pitch change control is performed by the mechanism shown in FIG. 3, as described above. By controlling the pitch change between the guide pulleys, the distortion of the elastic body 20 is kept at a predetermined constant value, and stable characteristics are obtained in which the output efficiency does not change even if the number of winding layers on the large diameter drum 12 changes.

Furthermore, when the energy input progresses and the winding position moves from the small diameter side to the large diameter side of the tapered drum, the length of the winding around the drum becomes longer, but the spring 49.50 allows the guide pulley 36.41 to be adjusted appropriately. By adjusting the position, changes in length are absorbed. If a spring suitable for the tension is provided for each of the three elastic bodies 20, the length can be adjusted more appropriately.

Second Embodiment Next, a second embodiment of the present invention is shown in FIGS. 8 to 13.

FIG. 8 shows a portion corresponding to FIG. 2 in the first embodiment, and substantially the same parts and members as in the first embodiment are designated by the same reference numerals as in the first embodiment. Therefore, the explanation will be omitted. In this embodiment, a mechanism using an adjuster 110 is used instead of the length change absorbing mechanism of the elastic body 20 using the springs 49 and 50 in the first embodiment.

Upper and lower rail portions 111 a and 111 b extend between the tapered drums 13 and 14 in the direction along the axis of the drums.
A guide rail 111 having
．． It expands in a tapered shape in the same direction as 14. The upper and lower adjusters 110 are arranged in grooves 113a formed in the frame 112.
, 113b, respectively, in the vertical direction. A pin 1 is provided at the tip of each adjuster 110.
A roller 115 is rotatably supported via a roller 14, and the roller 115 is moved on the rail by engaging with the lower surface of the upper rail 111a and the upper surface of the lower rail 111b, respectively. The adjuster 110 also includes guide pulleys 116 (116a, 116b, 116c).
), 117 (117a1117b, 117
c) is rotatably supported.

In such an embodiment device, as in the first embodiment,
The frame body 112 is intermittently moved in response to changes in the number of layers of the elastic body 20 wound on the large-diameter drum 12, thereby changing the position of the elastic body wound on the tapered drum 13, 14. As the frame body 112 moves, the adjuster 11
0 is also moved in the direction along the ram axis, and each roller 11
5 is the upper and lower rail 111a of the guide rail 111, 1
Transfer or move in accordance with 11b.

Since the guide rail 111 is expanded in a tapered shape, the adjuster 110 is adjusted in the vertical direction by the above movement, and the position of the guide pulleys 116 and 117 is adjusted.
The length of the elastic body 20 hanging thereon is automatically adjusted to the optimum length. That is, the winding on the tapered drum 13, 14 automatically absorbs the change in the length of the elastic body due to the change in position. Therefore, changes in tension due to changes in the length of the elastic body are prevented, the frame 112 can be moved smoothly, and there is little energy loss.

Further, in the above adjustment mechanism, since the directions in which each adjuster 110 is pulled up by the elastic body 20 are opposite to each other, the forces acting on the guide rail 111 are canceled out and become a very small force, and the guide rail 111 itself, As a result, the entire adjustment mechanism can be made compact.

Note that in the device of this embodiment, the guide pulley 116
a, 116 b, 116 G and guide pulley 1
As shown in FIG. 13, 17a and 117b1117G are provided coaxially so as to be freely rotatable independently and slidably in the direction along the axis.

Other configurations and operations are similar to those of the first embodiment.

[Effects of the Invention] As explained above, when using the elastic energy storage device of the present invention, an elastic body is wound multiple times on an intermediate drum consisting of at least two tapered drums, and a large number of Since the elastic body can be stretched sequentially in the same manner as in the case where an intermediate drum is used, the energy output efficiency can be increased while reducing the size of the entire device.

Furthermore, since a tapered drum is used as the intermediate drum, it is possible to employ multilayer winding of the elastic body while preventing excessive tension of the elastic body, and it is possible to increase the total amount of output (storage) energy.

Furthermore, when winding a small number of turns on a tapered drum, if a pitch adjustment mechanism between positions or a length change absorption mechanism of the elastic body is added, the position of the elastic body can be smoothly moved on the tapered drum. This allows for extremely smooth energy and output operation.

[Brief explanation of drawings]

1 is a schematic plan view of an elastic energy storage device according to a first embodiment of the present invention, FIG. 2 is a partial side view of the device shown in FIG. 1, and FIG. 3 is an enlarged partial sectional view of the device shown in FIG. 1. , Figure 4 is the third
A plan view of the slider of the device shown in the figure, FIG. 5 is a schematic configuration diagram of the drum arrangement of an equivalent model to the device of FIG. 1, FIG. 6 is a strain-tension characteristic diagram of the device of FIG.
FIG. 8 is an explanatory diagram showing the position of the elastic body wound around the tapered drum in the device shown in FIG. 8. FIG. 8 is a side view showing the same part as FIG. 9 is a longitudinal sectional view taken along line IX-IX in FIG. 8, FIG. 10 is a partial sectional view taken along line XX in FIG. 9, and FIG. 11 is a perspective view of the guide rail of the device in FIG. 8. , FIG. 12 is an enlarged partial sectional view of the device shown in FIG. 8, FIG. 13 is a partially sectional side view of the device shown in FIG. 12, and FIG. FIG. 15 is an energy output efficiency characteristic diagram of the device shown in FIG. 14; FIG. 16 is an energy output efficiency characteristic diagram of the two-drum energy storage device. 11......Drum with the minimum amount of outer circumference rotation 12...Drum with the maximum amount of outer circumference rotation 13.14...Intermediate drum 15 .16.17.18...Drum shaft 19...
......Mechanical connection means 20...
...Elastic body 21.21", 23.23-124.24-12B, 2
6'27.27'...Crank arm 22.22=, 25.25'...Round rod 28...
......Gear mechanism 29...
・Continuously variable transmission 30.31.47.48...Guide pulley 32...Moving frame 33.39.
...Axis 34.34=, 35.36.31.38.38-140
．． 41.42.43.43", 44.44', 45.4
5-14B, 46'...Guide pulley 4
9.50...Spring 51.52...Support shaft 53...Nut 54...Threaded rod 55.56... Vinebagya 57... Elastic body tension sensor 59.
・・・・・・・・・Clutch 64.65・・・・・・
・Drum base 68.69...Living rods 70, 71...Guide grooves 72.73...Guide 78...・Person, output shaft 81.82・
...Axis 87.88 ...Slider 90, 92 ...Slide pin 94 ...... Rotating pin 95.97
．． 100, 102... Sprocket 96.101.
...Chain 98.103...Spiral groove 99...Engager 110...Adjuster 111...Guide rail 112・・・・・・
...Frame 115 ...Roller 116, 117 ... Guide pulley Patent Applicant Toyota Motor Corporation Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 I hesitate, inspector

Claims (1)

[Claims] 1. A plurality of drums are arranged so that their axes are parallel to each other, and the plurality of drums are connected by a mechanical connection means so that the amount of outer circumferential rotation increases in the order of arrangement and so that they can rotate in conjunction with each other. Between the drum with the outer peripheral rotation amount and the drum with the maximum outer peripheral rotation amount, the distortion energy is stored and the stored strain energy is transferred between the outer peripheral surfaces of both drums via the outer peripheral surface of the intermediate drum. In an elastic energy storage device in which a string-shaped elastic body capable of discharging is stretched, at least two tapered drums each having a drum surface tapered in a direction along the drum axis are provided as the intermediate drum, and the elastic An elastic energy storage device characterized in that the elastic body is reciprocated and spanned between tapered drums so that the elastic body is wound at a plurality of positions on at least one tapered drum in a direction along the drum axis.