JPH01266358A - Elastic energy accumulating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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, cause a part of the elastic body to undergo a large constant ω strain, and expand the strain area. Regarding elastic energy storage devices that will be gradually expanded,
Especially when the elastic body is wound around the drum at a constant pitch in the direction along the drum axis and the position at which the elastic body is sent out from the intermediate drum is constant, this elastic energy storage system makes it possible to maintain high energy input/output efficiency. Regarding equipment.

[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 stretched 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 the problem arises 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 large fixed amount and the area is gradually enlarged. An energy storage device has been proposed that can efficiently output energy even when the initial strain during winding is O (Japanese Patent Application No. 168033/1982).

The energy storage device of Japanese Patent Application No. 61-168033 has an intermediate outer periphery between a small diameter drum 1 with a small amount of outer periphery rotation and a large diameter drum 2 with a large amount of outer periphery rotation, as shown in FIG. An intermediate drum 3 (or a plurality of drums may be used) with a rotating amount is provided, and a string-shaped 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 1. The elastic body 4 is stretched and its strain energy is stored by being wound from the side to the large-diameter drum 2 side, and the stored strain energy is released by being transferred in the opposite direction.

In such an energy storage device, the conventional two-drum system (Fig. 7) and the case of the conventional two-drum system (Fig. 7) in which drums with radii R1, R2, and R3 are connected with gears with the same number of teeth as shown in Figs.
As shown in the comparison with the drum method (Figure 6), by providing an intermediate drum, it is possible to increase the energy output efficiency and obtain output even when the initial strain of the elastic body is O. became possible.

[Problems to be Solved by the Invention] In the apparatus shown in FIG. 5, the wrapping position of the elastic body 4 on the intermediate drum 3 moves in the drum axis direction as each drum rotates, and the elastic body 4 is fed out from the small diameter drum 1. There is no problem since the elastic body 4 is naturally wound around the large-diameter drum 2 at a constant pitch, but if the position at which the elastic body is sent out from the intermediate lower ram is fixed as described below, There is a problem in that the tension of the elastic body changes depending on the winding position on the large diameter drum or the small diameter drum or the unwinding position.

Such problems occur, for example, in the following cases.

In the energy storage device described above, in order to increase the total amount of energy output, it is necessary to increase the length of the elastic body and wrap the elastic body in multiple layers on the drum (large diameter drum and small diameter drum). It is effective to do so.

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 winding H decreases, the elastic body may not be fed sufficiently. 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 torque between the drums cannot be balanced if the drums are simply formed quickly.

One way to prevent this is to use a tapered intermediate drum, and change the winding position of the elastic material on the tapered drum according to changes in the winding layer on the large-diameter drum or the small-diameter drum. There is a method of keeping the tension of the elastic body constant between the intermediate drum and the large-diameter drum or the small-diameter drum by changing the diameter. In order to change the wrapping position on the intermediate drum made of a tapered drum, it is sufficient to restrict the movement locus of the elastic body and move only the tapered drum in the direction of the drum axis.

With such a device configuration, the position at which the elastic body is sent out from the intermediate drum is fixed, so in order to wind the elastic body at a constant pitch on a large-diameter drum or a small-diameter drum, it is necessary to An elastic guide means that moves along the drum in synchronization with the rotation of the drum is required. For example, as schematically shown in FIG. 8, the feeding position of the elastic body 7 of the intermediate drum 6 is fixed at point A, and the elastic body 7 fed out from point A reciprocates in the direction along the drum axis. Guide means 8
After being guided by the drum 9, it is wound onto the drum 9.

However, although the elastic body 7 is wound neatly on the drum 9 one after another by the guidance by the guide means 8, when the position of the guide means changes from B to B', A-8
Since the distance between A and B changes, the tension in the elastic body 7 changes, causing problems such as over-tension. Furthermore, the force exerted by the elastic body itself is applied to the guide means 8 that moves the elastic body 7, and the energy storage device needs a torque to overcome this force and move the elastic body 7, which reduces the efficiency of the valve device. A problem arises.

The present invention focuses on the above-mentioned problems, and maintains the tension of the elastic body between the intermediate drum and the intermediate drum at a constant level regardless of the position at which the elastic body is wrapped around the drum, thereby solving problems such as excessive tension of the elastic body. The aim is to simultaneously increase energy input and output efficiency.

[Means for Solving the Problems] The elastic energy storage device of the present invention that meets this objective includes a plurality of drums disposed so that their axes are parallel to each other, and a plurality of drums arranged so that the outer periphery of the drums is parallel to each other. connected by a mechanical connection means so that the amount of rotation is increased and can be rotated in conjunction with each other,
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 which can emit On the other hand, a first elastic body guiding means is moved in a direction parallel to the axis of the drum in synchronization with the rotation of the drum with the maximum outer circumferential rotation amount or the drum with the minimum outer circumference rotation amount, and guides the moving elastic body. a guide rail that curves in an arch in a direction substantially perpendicular to the transition locus of the elastic body between the drum and the intermediate drum; and a guide rail that is supported on the guide rail so as to be movable along the guide rail. a second elastic body guiding means, and an interlocking means for connecting the first elastic body guiding means and the second elastic body guiding means and interlocking both guiding means in the same direction with respect to the direction along the drum axis; A feed-out position fixing elastic body guide means is provided to keep the elastic body feed position from the intermediate drum at a substantially constant position.

[Function] In such a device, the elastic body is moved from the intermediate drum to
It is sent out from a fixed position by the sending-out position fixed elastic body guide means, and is sequentially wound in the direction along the axis of the drum on the drum between the maximum outer circumference rotation or the drum with the minimum outer circumference rotation, but between the two drums. is provided with a second guide means which moves on an arch-curved guide rail, which guide rail extends in a direction substantially perpendicular to the trajectory of the transition of the elastic body, so that the guide rail is By appropriately setting the arch shape and interlocking the first guide means and the second guide means by the interlocking means, the elasticity between the intermediate drum and the drum with the maximum amount of outer circumference rotation or the drum with the minimum amount of outer circumference rotation can be improved. It becomes possible to maintain a constant distance along the body transition trajectory, and it becomes possible to maintain the elastic body tension at a predetermined constant tension during this time.

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

1-4 illustrate an elastic energy storage device according to one 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 with two intermediate drums, the number of intermediate drums is not limited to this.

The axes 15.115.17.18 of the plurality of drums are arranged parallel to each other, and the axes 15.115.17.18 of each drum 11.13.14.
12 are connected by a mechanical connection means 19 so that the amount of rotation of the outer periphery increases in the order in which they are arranged and is rotatable in conjunction with each other. A string-like elastic body 20 is passed between the small-diameter drum 11 and the large-diameter drum 12 via intermediate drums 13 and 14, and when stretched, the elastic body 20 stores strain energy inside. It is constructed from a material that can store When strain energy is stored in the elastic body 20, a portion 20a wound around the outer peripheral surface of the small-diameter drum 11 is unwound, and the portion 20a wound around the intermediate drum is sequentially stretched between the portion 20a and the stretched elastic body 20. The body 20 is finally wound around the outer peripheral surface of the large diameter drum 12 as a portion 20b. At the time of energy release, the elastic body 20 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.

Of the mechanical coupling means 19, the shaft 18.11.1 connects the large diameter drum 12 and the intermediate drum 13.14.
Crank arm (or crank wheel) provided at the end of 6 21.22.23.21", 2:l", 2
3”, and connecting rod 24.24-, large diameter drum 1
2 and the intermediate drums 13 and 14 are designed to rotate in synchronization and interlock at the same rotation speed. The intermediate drum 13 and the small diameter drum 11 are connected via a gear mechanism 25 and a continuously variable transmission 26, and by adjusting the increase and deceleration of the continuously variable transmission @26,
It is possible to change the rotation speed difference between the drums.

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 made of this tapered drum are
It is connected to the shafts 16 and 17 via a spline mechanism or the like, and is supported so as to be movable in the direction along the drum axis while transmitting torque.

Thrust bearing 27.2 for drum 13.14
A moving base 29 is provided via 8, and a nut 31 screwed onto a threaded rod 30 is attached to the moving base 29. Therefore, due to the rotation of the threaded rod 30, the intermediate drum 13.1 is moved through the nut 31 and the moving base 29.
4 is moved in the direction along the axis. The threaded rod 30 is connected to the gear mechanism 2 via Geneva gears 32 and 33.
5, and the movement of the intermediate drum 13, 14 is performed intermittently via Geneva gears 32, 33. This intermittent movement is performed by the Geneva gear 32.
33 (Geneva mechanism), these gear systems are set so that the above-mentioned intermittent feeding is performed at the moment when the 200 layers of elastic material on the large diameter drum 12 changes.

The elastic body 20 transferred between the small-diameter drum 11 and the large-diameter drum 12 is moved by guide pulleys 35, 36, 37, .
38 and 39, the drums are guided along a constant trajectory when viewed in the direction along the axis of each drum. Therefore, when the intermediate drums 13, 14 are moved as described above, the wrapping position of the elastic body 20 on the tapered outer peripheral surface changes, and the wrapping diameter changes. The tapered shape of the intermediate drums 13.14 is such that, for example, when the elastic layer is changed on the large-diameter drum 12 and the tapered drum 13.14 is intermittently fed as described above, The shape is set such that the difference in the amount of strain between the elastic bodies is kept constant. However, it is not limited to this shape, and it is also possible to select a Taber shape so that the ratio or difference in the winding diameter between both drums becomes an appropriate target value depending on the person who needs it and the output characteristics. .

Further, it is desirable that the degree of inclination in the tapered shape is such that the elastic body 20 wound around it always slides down to the small diameter side.

An elastic body tension sensor 40 that detects the tension of the elastic body 20 is provided between the guide pulleys 35 and 36, and a signal from the sensor 40 is sent to the gear mechanism 25 side and the microphone gear 41.
The signal is sent to the clutch 42 which is connected to the adjustment mechanism section of the continuously variable transmission 26 via. The clutch 42 can adjust the increase/deceleration of the continuously variable transmission 26 through its operation, and is controlled so that the detection signal from the elastic body tension sensor 40 is maintained at a constant value.

The small-diameter drum 11 is supported by a spline connection or the like to the shaft 15 so as to be movable in a direction along the shaft center while transmitting torque. The small diameter drum 11 is interlocked with a small diameter drum base 45 via thrust bearings 43, 44. The small-diameter drum base 45 is provided with an arm 46, and the arm 46 is provided with a guide 49 that is guided along a helical guide groove 48 of a lie-bin rod 47 extending in a direction along the drum axis. It is being Guide 49
is guided along the guide groove 48, so that the small-diameter drum 11 is reciprocated in the direction along the axis via the drum base 45, and this reciprocating movement is caused to rotate the small-diameter drum 11 via the gears 50 and 51. Since the elastic body 20 is interlocked with the drum, the elastic body 20 is wound on the outer peripheral surface of the drum without any gaps or unwound in sequence, and the winding layer changes as the direction of the reciprocating motion changes.

Note that 52 in the figure indicates an output shaft of this device, and energy is outputted via gears 53 and 54.

Between the large-diameter drum 12 and the intermediate drum 14, there is provided an elastic guide device 60 as a feeding position fixed elastic guide means, a guide rail 61 curved in an arch shape, and a guide rail 6.
a movable guide pulley 62 as a second elastic guide means supported movably on the guide rail 61 on the guide rail 61;
As a first elastic body guiding means that moves in a direction parallel to the axis of the large diameter drum 12 along the lie-bin shaft 63 and sequentially guides the elastic body 20 to a predetermined winding position of the large diameter drum 12. A moving guide pulley 64 and a synchronization shaft 65 as interlocking means for interlocking the first and second elastic guide means in the same direction along the drum axis are provided.

The elastic guide device 60 includes a frame 66 fixed on the bottom surface of the device support 34 and a bearing 67 on the frame 66.
It consists of a cylindrical guide 68 rotatably supported through the cylindrical guide 68 and a guide pulley 70 that guides the elastic body 20 inserted through the hole 69 of the cylindrical guide 68. The guide 68 rotates,
The guide pulley 70 faces the elastic body sending direction.

The guide rail 61 is fixed to a holder 71 fixed on the bottom surface of the device support 34, and is arranged in a circular, elliptical or oblong arch shape in a direction substantially perpendicular to the transition locus of the elastic body 20. It is overhanging.

This arch shape is set so that the length of the elastic body 20 between the intermediate drum 14 and the large diameter drum 12 is kept constant, as will be described later. A movable guide pulley 62 serving as a second guide means is connected to a guide rail 61 via a bearing 72.
It is rotatably supported via a bearing 74 on a guide 73 which is movably supported above. The guide 73 moves on the guide rail 61 in conjunction with the swing arm 75, and the swing arm 75 is swingable about a fulcrum of a shaft 77 rotatably supported by a frame 76.

A reciprocating spiral guide groove 7 is provided on the lie-bin shaft 63.
8 is carved and the guide element 7 engages with the guide groove 78.
A guide 80 is configured to reciprocate along the lie-bin axis via the guide 9 in accordance with the rotation of the large-diameter drum 12. A movable guide pulley 64 serving as a first elastic guide means is rotatably supported on this guide 80 via a bearing 81 . The life shaft 63 is connected to the gear 82
．． 83.

One end of the synchronous shaft 65 is connected to the guide 80 via a pin 84.
The middle part of the synchronization shaft 65 in the longitudinal direction engages the swing arm 75 through an elongated hole 85, and the other end engages with a fixing pin 87 through an elongated hole 86. . The synchronous shaft 65 is configured to swing horizontally around the bin 87 while moving in its own expansion and contraction direction.

In this embodiment, the first and second elastic guide means, the guide rail, the interlocking means, and the feeding position fixing elastic guide means were provided only between the intermediate drum 14 and the large diameter drum 12, but the intermediate drum It may be provided between the drum 13 and the small diameter drum 11, or it may be provided on both.

In the elastic energy storage device configured as described above, at the time of energy input, the elastic body 20 is initially wound in multiple layers on the outer peripheral surface of the small diameter drum 11.

When each drum is rotationally driven by a person, an output shaft 52, a person, and an output gear 53.54, the elastic body 20 is unwound from the small diameter drum 11 and transferred to the large diameter drum 12 side via the intermediate drum 13.14. and is sequentially wound around the outer peripheral surface of the large diameter drum 12. At this time, the tension of the elastic body 20 tends to change due to changes in the winding layers on the small diameter drum 11 and the large diameter drum 12, but on the small diameter drum 11 side, the tension of the elastic body 20 is detected by the elastic body tension sensor 40. detected,
The signal is sent to the clutch 42, and the continuously variable transmission 26 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 winding layer of the elastic body 20 on the large-diameter drum 12 increases, the intermediate drum 13.14 is intermittently moved to the right in the figure by the Geneva gear 32.33, and the winding layer on the tapered drum is increased. The diameter is also increased synchronously. As a result, the radius of the large diameter drum 12 is set to r2 so that the difference between the amount of elastic body strain on the large diameter drum 12 and the amount of elastic body strain on the intermediate drum 14 is kept constant.
, when the radius of the intermediate drum 14 is rl, the strain ε is as follows: ε=(2πr2−2πr1)/(2πr1)=(r2
-rl>/r1 = is controlled to be constant, and changes in the tension of the elastic body 20 during this time when the number of winding layers changes are absorbed. The above control is performed each time the number of layers of the elastic body 20 increases on the large-diameter drum 12, so that the energy input/output characteristics are stabilized.

The elastic bodies 2 are sequentially placed on the large-diameter drum 12 in a certain winding layer state.
When 0 is wound or unwound, the winding position on the large diameter drum 12 changes in the direction of the drum axis, so as mentioned above, the length of the elastic body between the intermediate drum 14 is about to change. However, in this device, the elastic body guide device 6
The length of the elastic body between the movable guide pulley 64 and the movable guide pulley 64 is kept constant, and changes in tension during this period are prevented. That is, in FIG. 2, if the position of the guide pulley 70 is A, the position of the movable guide pulley 62 is c, c'', and the position of the movable guide pulley 64 is DlD-, the shape of the guide rail 61 is the same as that of the elastic body 20. The transition axis trace is set to have the same length as A-C-D and 8-G--D=.In other words, in the plane including the arch shape of the guide rail 61, the center point B
Take the x and y coordinates based on the plane, and move the guide pulley 7 from the plane.
0 is 9, and the distance from the plane to the moving guide pulley 64 is h, the length of the elastic body passing through any C-1D', that is, the length of A-C''-D- is approximately x + y +g + y +■”,
The arch shape is determined by the x and y values such that these values are constant. Note that q and h can be determined in advance.

The elastic body 20 is guided by the movable guide pulley 62 that moves on the guide rail 61 designed as described above, and the movable guide pulleys 62 and 64 are naturally interlocked. The length of the elastic body of is kept constant, and its tension is kept constant.

Further, the tension of the elastic body 20 acts on the movable guide roller 62 in the direction of the arrow ■ in FIG. 3, and no component force in the J direction is generated. This also applies to the moving guide rollers 64, and the guides 73, 80, . The swing arm 75 can be moved with very little torque, and the energy storage device as a whole can achieve high input/output efficiency.

[Effects of the Invention] As explained above, when using the elastic energy storage device of the present invention, the winding position of the elastic body in the direction along the drum axis on the drum with the maximum outer circumference rotation amount or the drum with the minimum outer circumference rotation amount can be adjusted. Even if the length of the elastic body changes, the length of the elastic body between the intermediate drum and the intermediate drum can be kept constant, so the tension between them can be kept constant, and over-tension of the elastic body can be prevented. Since force in the direction along the drum axis is not substantially applied to the elastic guide means, energy loss can be suppressed and the energy input/output efficiency of the entire apparatus can be improved.

[Brief explanation of the drawing]

1 is a schematic plan view of an elastic energy storage device according to an embodiment of the present invention, FIG. 2 is a partially enlarged schematic perspective view of the device of FIG. 1, and FIG. 3 is a second view of the device of FIG. 1. FIG. 4 is a schematic plan view of the interlocking means in the device shown in FIG. 1; FIG. 5 is a perspective view of the energy storage device proposed in Japanese Patent Application No. 168033/1983; Figure 6 is an energy output efficiency characteristic diagram of the device shown in Figure 5, Figure 7 is an energy output efficiency characteristic diagram of a two-drum energy storage device, and Figure 8 is a case where the elastic body feeding position from the intermediate drum is fixed. FIG. 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 21.22.23.21-122-123-...
......Crank arm 24.24'...Connecting rod 25...Gear mechanism 26...
・・・・・・Continuously variable transmission 29・・・・・・・・・・・・
・Moving base 30・・・・・・・・・Threaded rod 31・・・・・・・・・Nut 32.33・Old Geneva gear 34・・・・・・・・・...Support body 35.36.37.38.39...Guide pulley 40
・・・・・・・・・Elastic body tension sensor 42...
・・・・・・・・・Clutch 45・・・・・・・・・・
...Drum base 47.63...Living rod 48.78...Guide groove 49.79...Guide 52... ...Person, output shaft 60...
..... Feeding position fixing elastic body guide means 61 ..... Guide rail 62 ...
...Moving guide pulley 64 as second elastic body guide means...Moving guide pulley 65 as first elastic body guide means... ......Synchronized shaft 68 as interlocking means...Cylindrical guide 70.
......Guide pulley 71...
...Holder 73...Guide 75...Swing arm 80...
......Guide 85.86...Elongated hole Fig. 4 Fig. 8

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-like elastic body that can be released is stretched, at least one of between the intermediate drum and the drum with the maximum amount of outer circumferential rotation, or between the intermediate drum and the drum with the smallest amount of outer circumferential rotation. a first elastic body guiding means that is moved in a direction parallel to the axis of the drum in synchronization with the rotation of the drum with the maximum outer circumference rotation amount or the drum with the minimum outer circumference rotation amount and guides the moving elastic body; , a guide rail extending in an arched manner in a direction substantially perpendicular to the transition locus of the elastic body between the drum and the intermediate drum; and a guide rail supported on the guide rail so as to be movable along the guide rail. a second elastic body guide means, an interlocking means for connecting the first elastic body guide means and the second elastic body guide means and interlocking both guide means in the same direction along the drum axis; 1. An elastic energy storage device comprising: a feeding position fixing elastic body guide means for keeping the elastic body feeding position from the drum at a substantially constant position.