Bidirectional power generation system for elevator

Abstract

The present invention relates to a bidirectional power generation system for an elevator and, more specifically, to a bidirectional power generation system for an elevator, which can be easily applied to an existing elevator and can be installed at low cost to generate electric power during the ascent and descent of the elevator, the bidirectional power generation system comprising a power generation device installed at the top and / or bottom of an elevator car that moves along a guide rail installed vertically along an elevator shaft in a building, wherein the power generation device comprises: a roller that, while making contact with the guide rail, rotates as the elevator car moves; a transmission that rotates the output shaft in the same direction regardless of whether an input shaft connected to the roller rotates forward or backward; and a generator that receives rotational force from the output shaft of the transmission to produce electric power, and the power generation device can generate electric power during the ascent and descent of the elevator car by means of the transmission.

Description

Elevator bidirectional power generation system

[0001] The present invention relates to an elevator bidirectional power generation system, and more particularly, to an elevator bidirectional power generation system capable of generating power when an elevator ascends and descends.

[0002] In general, an elevator is a device that can rise and fall vertically to facilitate the movement of people or materials in a building. It is composed of a guide rail installed vertically near the walls on both sides along an elevator shaft inside a building, an elevator car that can accommodate people or materials while ascending and descending along the guide rail, a traction machine that pulls a cable connected to the elevator car, and a driving unit that drives the traction machine.

[0003] The power supply of these elevators consists of a driving power supply, which is the power used to operate the elevator normally, and a commercial power supply and battery, which are the power supplies to parts that need to be operated in emergencies such as power outages. The amount of power used by the elevator is considerable, and especially in the summer when power usage is high due to the use of air conditioners, etc., problems caused by excessive power use can affect the operation of the elevator.

[0004] Accordingly, development is underway on technology that can generate electricity by driving elevators, but there are problems such as difficulty in applying it to existing elevators or excessive cost incurred in applying it.

[0005] The present invention is intended to solve the above-mentioned problems and to provide an elevator bidirectional power generation system that can be easily applied to existing elevators and can be installed at low cost to produce power when the elevator ascends and descends.

[0006] In order to achieve the above object, the present invention provides a two-way elevator power generation system, comprising: a power generation device installed at least at the top or bottom of an elevator car that ascends and descends along a guide rail installed vertically along a hoistway in a building; wherein the power generation device comprises: a roller that rotates while contacting the guide rail according to the movement of the elevator car; a transmission that rotates an output shaft in the same direction when an input shaft coupled to the roller rotates forward or reversely; and a generator that receives rotational force from the output shaft of the transmission and generates electric power; wherein the power generation device can generate electric power when the elevator car ascends and descends by the transmission.

[0007] In addition, the rollers are arranged on both sides of the guide rail, one of which is coupled to the input shaft of the transmission, and the power generation device may further include an elastic pressure member that applies elastic force to make the rollers adhere to the guide rail.

[0008] Additionally, the input shaft and output shaft of the above transmission can be formed into a structure capable of being bent in multiple directions.

[0009] Additionally, the above-mentioned power generation device may be provided near the guide rails arranged on both sides at the top and bottom of the elevator car.

[0010] In addition, the elevator car may further include a driving cable that is fixedly connected at one end to a winding drum and is wound or unwound in a machine room provided at the upper or lower side of the elevator shaft; a power cable that is integral with the driving cable on the elevator shaft and transmits power generated from a generator; and a controller that is provided in the machine room and receives power from the power cable and performs MPPT (Maximum power point tracking) control.

[0011] According to the present invention, it can be easily applied to newly installed elevators as well as existing elevators, thereby increasing the convenience of installation and construction, and it can be installed at low cost / low load compared to expensive power supply construction costs, and power is generated when the elevator rises and falls, and the generated power can be utilized in various ways, such as in elevators, buildings, and ESS.

[0012] Figure 1 is an exemplary diagram showing the overall structure of the elevator bidirectional power generation system of the present invention.

[0013] Figure 2 is an exemplary diagram showing a state in which a power generation device applied to the elevator bidirectional power generation system of the present invention is installed in an elevator car.

[0014] Figures 3 to 6 are exemplary diagrams showing the structure of a power generation device applied to the elevator bidirectional power generation system of the present invention.

[0015] Figures 7 and 8 are exemplary diagrams showing the operation of a transmission constituting a power generation device applied to the elevator bidirectional power generation system of the present invention.

[0016] Figure 9 is an exploded perspective view showing a transmission applied to the elevator bidirectional power generation system of the present invention.

[0017] Fig. 10 is a perspective view showing the internal structure of the housing of the transmission applied to the elevator bidirectional power generation system of the present invention.

[0018] Figure 11 is an exemplary diagram showing the rotation direction of each component when the input shaft of the transmission applied to the elevator bidirectional power generation system of the present invention rotates in the first direction.

[0019] Fig. 12 is a cross-sectional view showing the coupling relationship between the housing of the transmission and the input shaft during operation according to Fig. 11.

[0020] Fig. 13 is an example diagram showing the movement of the second shaft of the transmission and the one-way bearing during the operation according to Fig. 11.

[0021] Figure 14 is an exemplary diagram showing the rotation direction of each component when the input shaft of the transmission applied to the elevator bidirectional power generation system of the present invention rotates in the second direction.

[0022] Fig. 15 is a cross-sectional view showing the coupling relationship between the housing and the input shaft of the transmission during operation according to Fig. 14.

[0023] Fig. 16 is an example diagram showing the movement of the second shaft of the transmission and the one-way bearing during the operation according to Fig. 14.

[0024] Fig. 17 is an exemplary diagram showing that power produced by a controller applied to an elevator bidirectional power generation system of the present invention can be utilized.

[0025] The present invention proposes an elevator bidirectional power generation system, which can be easily applied to existing elevators and can be installed at low cost to generate power when the elevator ascends and descends, including a power generation device installed at least at the top or bottom of an elevator car that ascends and descends along a guide rail vertically installed along a hoistway in a building, wherein the power generation device comprises: a roller that rotates while contacting the guide rail according to the movement of the elevator car; a transmission that rotates an output shaft in the same direction both when an input shaft coupled to the roller rotates forwardly or reversely; and a generator that receives rotational force from the output shaft of the transmission and generates power; wherein the power generation device is characterized in that it can produce power when the elevator car ascends and descends by the transmission.

[0026] The scope of the present invention is not limited to the embodiments described below, and various modifications may be made by a person having ordinary knowledge in the relevant technical field without departing from the technical spirit of the present invention.

[0027] Hereinafter, the elevator bidirectional power generation system of the present invention is described in detail with reference to the attached drawings 1 to 17.

[0028]

[0029] The elevator bidirectional power generation system of the present invention includes a power generation device (A) that is installed at least at one of the upper or lower portions of an elevator car (20) that ascends and descends along a guide rail (10) vertically installed along an elevator shaft in a building, as illustrated in FIGS. 1 and 2, and that generates power.

[0030] The power generation device (A) may be installed in the elevator car (20) depending on the amount of power to be generated. For example, as illustrated in FIG. 2, guide rails (10) may be installed vertically along the hoistway on both sides of the elevator car (20), and the power generation devices (A) may be installed near the guide rails (10) arranged on both sides at the top and bottom of the elevator car (20). For example, if 1.6 kWh of power is generated per power generation device (A), a total of four power generation devices (A) are installed in the elevator car (20), and up to 6.4 kWh can be generated.

[0031] This power generation device (A) includes a transmission (100), a roller (200), and a generator (300), as shown in FIGS. 3 to 6.

[0032] First, looking at the transmission (100), as shown in FIGS. 7 and 8, the input shaft (110) is configured to rotate the output shaft (170) in the same direction whether the input shaft (110) rotates forward or reversely, the input shaft (110) is coupled with the roller (200) to receive rotational power from the roller (200), and the output shaft (170) is coupled with the generator (300) to transmit rotational power to the generator (300).

[0033] Such a transmission (100) may be configured to include, as a specific example, an input shaft (110), a housing (120), a first driven part (130) including a first shaft (131) and a first bevel gear (132), a second driven part (140) including a second shaft (141) and a second bevel gear (142), a one-way bearing (150), a third bevel gear (160), and an output shaft (170), as shown in FIGS. 9 to 16.

[0034] The input shaft (110) is a main shaft that transmits power by rotating by an external force, and the power produced by the rotation of the input shaft (110) is ultimately transmitted to the output shaft (170) through the housing (120), the first driven member (130), and the second driven member (140). The input shaft (110) is coupled to the center of the roller (200) so as to rotate integrally with the roller (200), and can rotate in both directions depending on the rotational direction of the roller (200) according to the rising or falling of the elevator car (20). As the roller (200) moves along the guide rail (10), shaking may occur due to the movement of the elevator car (20). In order for the rotational power to be easily transmitted through the input shaft (110) despite such shaking, the input shaft (110) may be formed in a structure that can be bent in multiple directions.

[0035] And the input shaft (110) can be coupled with the housing (120) in an extending direction. The housing (120) surrounds the one-way bearing (150) from the outside, and the inside of the housing (120) can be hollow. In addition, the housing (120) can include a shaft passage hole (122) formed in the center so that the first shaft (131) and the second shaft (141) can pass through. And the housing (120) is always coupled with the input shaft (110) regardless of the rotational direction of the input shaft (110) and is linked to the rotation of the input shaft (110), and the input shaft (110) and the housing (120) can rotate concentrically.

[0036] The combination of the input shaft (110) and the housing (120) can be achieved through the combination of corresponding grooves (111) and protrusions (121). For example, a groove (111) may be formed along the longitudinal direction of the input shaft (110) at one end of the input shaft (110), and the housing (120) may include a protrusion (121) that protrudes and extends toward the input shaft (110) at the center of one side facing the input shaft (110).

[0037] At this time, the protrusion (121) of the housing (120) is always inserted into the groove (111) of the input shaft (110) so that it can be continuously linked to the rotation of the input shaft (110), and the protrusion (121) can reciprocate along the longitudinal direction of the groove (111) while being inserted into the groove (111) according to the rotational direction of the input shaft (11). This is to secure a free space in which the housing (120) can move in position for mutual switching between the engagement and separation of the housing (120) and the first shaft (131) described later.

[0038] The first driven part (130) may include a first shaft (131) that is selectively coupled to the housing (120) depending on the rotational direction of the housing (120) and rotates in conjunction with the rotation of the housing (120), and a first bevel gear (132) that rotates in conjunction with the rotation of the first shaft (131). In addition, the second driven part (140) may include a second shaft (141) that rotates concentrically with the first shaft (131), and a second bevel gear (142) that rotates in conjunction with the rotation of the second shaft (141).

[0039] Meanwhile, the first shaft (131) can be inserted at least partially into the second shaft (141). The first shaft (131) and the second shaft (141) are rotated in different directions by the third bevel gear (160) described later. By configuring the first shaft (131) to be positioned inside the second shaft (141) so that concentric rotation is possible, space can be utilized efficiently.

[0040] The first shaft (131) may include a screw portion (133) so that it can be engaged with or disengaged from the housing (120) depending on the rotational direction of the housing (120), and the housing (120) may also include a screw portion (123) for engaging and disengaging with the first shaft (131). For example, the screw portion (133) of the first shaft (131) may be a male screw formed along the outer circumferential surface of the first shaft (131), and the screw portion (123) of the housing (120) may be a female screw formed along the inner circumferential surface of the housing (120). While the first shaft (131) and the housing (120) are interlocked and connected to each other, the rotational power of the housing (120) is directly transmitted to the first shaft (131), and while the first shaft (131) and the housing (120) are separated, the rotational power of the housing (120) is not directly transmitted to the first shaft (131).

[0041] A one-way bearing (150) is arranged inside a housing (120) and can selectively transmit power to a second shaft (141) depending on the rotational direction of the housing (120). This one-way bearing (150) may include an inner ring (151) into which the second shaft (141) is inserted, and an outer ring (152) located on the outside of the inner ring (151). The inner ring (151) and the outer ring (152) only allow relative rotation in one direction.

[0042] A first unit, which is either a housing (120) or a one-way bearing (150), can be coupled or separated from another second unit. The first unit can reciprocate between a coupling position where it is coupled to the second unit and a separation position where it is separated from the second unit. In addition, one of the first unit and the second unit can include a spiral key portion and the other can include a spiral groove portion so that the first unit can be coupled to the second unit while rotating.

[0043] For example, if the first unit is a housing (120) and the second unit is a one-way bearing (150), the spiral key portion (124) may be formed on the upper surface of the lower inner side of the housing (120), and the spiral red portion (154) may be formed on the lower surface of the one-way bearing (150).

[0044] When the input shaft (110) and the housing (120) rotate in the second direction, the spiral key portion (124) is inserted into the spiral groove portion (154), so that the housing (120) and the one-way bearing (150) are coupled to each other, and the one-way bearing (150) rotates in the second direction together with the housing (120). At this time, the inner ring portion (151) of the one-way bearing (150) transmits power to the second shaft (141), so that the second shaft (141) can rotate in the second direction. Conversely, when the input shaft (110) and the housing (120) rotate in the first direction, the spiral key portion (124) is separated from the spiral groove portion (154), so that the coupling between the housing (120) and the one-way bearing (150) can be released, and at this time, the one-way bearing (150) can be rotated relative to the housing (120). In this way, the one-way bearing (150) becomes capable of relative rotation with respect to the housing (120), so that instead of transmitting power to the second shaft (141), it receives power from the second shaft (141) that rotates in the second direction.

[0045] The second shaft (141) can rotate relative to the inner ring (151) by a predetermined angle. When the rotation direction of the input shaft (110) is changed from the first direction to the second direction, the first shaft (131) and the housing (120) are gradually released from the screw connection. However, until the rotation direction is completely released, it is necessary to delay the second shaft (141) from providing rotational power to the one-way bearing (150) in order to alleviate the mechanical shock caused by the change in direction.

[0046] To this end, the second shaft (141) may include a key portion (143) extending along the circumferential direction, and the inner ring portion (151) may include a groove portion (153) formed on the inner surface along the circumferential direction at an angle greater than the circumferential angle of the key portion (143) on the second shaft (141). That is, since the key portion (143) extended to the second shaft (141) can rotate within the angle of the groove portion (153) formed on the inner ring portion (151), the second shaft (141) can rotate relative to the inner ring portion (151) by a predetermined angle.

[0047] Meanwhile, the third bevel gear (160) can rotate while meshing between the first bevel gear (132) coupled to the first shaft (131) and the second bevel gear (142) coupled to the second shaft (141), thereby allowing the first bevel gear (132) and the second bevel gear (142) to rotate in opposite directions. To this end, the first shaft (131) and the second shaft (141) can rotate concentrically but in opposite directions.

[0048] The output shaft (170) can receive power from the above-described components and rotate in a single direction. The output shaft (170) can rotate in conjunction with at least one of the first bevel gear (132), the second bevel gear (142), and the third bevel gear (160). Hereinafter, the output shaft (170) will be described mainly when it is connected to the third bevel gear (160) and rotates. The output shaft (170) is connected to the rotational axis of the generator (300) and transmits rotational power to the generator (300). In addition, the output shaft (170) plays a role in transmitting power while connecting the transmission (100) provided on the elevator car (20) and the generator (300). In order for the rotational power to be easily transmitted even when the elevator car (20) shakes due to movement, the output shaft (170) can be formed with a structure that can be bent in multiple directions.

[0049] Hereinafter, with reference to FIGS. 11 to 16, the operation of the transmission (100) will be described, and it is assumed that the first direction is counterclockwise, the second direction is clockwise, the first shaft (131) always rotates in the first direction, and the second shaft (141) and the one-way bearing (150) always rotate in the second direction.

[0050] FIGS. 11 to 13 illustrate the operation of the transmission (100) when the input shaft (110) rotates in the first direction. When the input shaft (110) rotates in the first direction and the housing (120) coupled thereto rotates in the first direction, the first driven member (130) can rotate in the first direction in the same manner as the housing (120). In addition, when the input shaft (110) rotates in the first direction, the protrusion (121) of the housing (120) inserted into the groove (111) of the input shaft (110) moves away from the input shaft (110), so that the degree of insertion into the groove (111) can be shortened as shown in FIG. 12 rather than in FIG. 15. However, since the housing (1200) is still inserted into the groove (111) of the input member (110), it can rotate in the first direction in conjunction with the rotation of the input shaft (110).

[0051] At this time, the first shaft (131) is gradually meshed with the housing (120), and from at least a certain point when the meshing is completed, it can rotate in the first direction in conjunction with the rotation of the housing (120), and the first bevel gear (132) can also rotate in the first direction in conjunction with the rotation of the first shaft (131).

[0052] Meanwhile, when the first shaft (131) is coupled to the housing (120) and is linked to the rotation of the housing (120), the one-way bearing (150) can be released from the coupling with the housing (120). That is, the housing (120) can be selectively coupled with either the first shaft (131) or the one-way bearing (150) depending on the rotational direction.

[0053] While the first shaft (131) and the housing (120) are coupled, the housing (120) and the one-way bearing (150) do not restrict each other's movements, and the one-way bearing (150) may not transmit the power of the housing (120) to the second shaft (141). At this time, the second bevel gear (142) rotates in a second direction opposite to the rotational direction of the first bevel gear (132) by the third bevel gear (160), and the second shaft (141) rotates in the same second direction as the second bevel gear (142) coupled on the second shaft (141).

[0054] Meanwhile, as described above, the second shaft (141) can rotate relatively within the angle of the groove (153) formed on the inner surface of the inner ring (151). And when one end of the key (143) formed on the second shaft (141) comes into contact with one end of the groove (153) due to the relative rotation of the second shaft (141) with respect to the inner ring (151), the second shaft (141) can no longer rotate relatively with respect to the inner ring (151). However, since the rotational power of the second shaft (141) is sequentially transmitted to the inner ring (151) and the outer ring (152), the one-way bearing (150) can rotate in the second direction together with the second shaft (141).

[0055] FIGS. 14 to 16 illustrate the operation of the transmission (100) when the input shaft (110) rotates in the second direction. When the input shaft (110) rotates in the second direction and the housing (120) coupled thereto rotates in the second direction, the second driven member (130) and the one-way bearing (150) can rotate in the second direction in the same manner as the housing (120). In addition, when the input shaft (110) rotates in the second direction, the protrusion (121) of the housing (120) inserted into the groove (111) of the input shaft (110) moves in a direction closer to the input shaft (110) so that it can be inserted deeper into the groove (111) as shown in FIG. 15 rather than FIG. 12, and the housing (1200) can rotate in the second direction in conjunction with the rotation of the input shaft (110).

[0056] At this time, the first shaft (131) is gradually disengaged from the housing (120), and the first shaft (131) is no longer linked to the rotation of the housing (1200) and rotates in opposite directions.

[0057] On the other hand, as the coupling between the first shaft (131) and the housing (120) is gradually released, the one-way bearing (150) is gradually coupled with the housing (120) and can rotate in conjunction with the rotation of the housing (120), and transmit power to the second shaft (141) inserted into the inner ring (151) via the outer ring (152) and the inner ring (151). That is, the one-way bearing (150) transmits the rotational power of the housing (120) to the outer ring (152) when the spiral groove (154) formed on the outer ring (152) is coupled to the spiral key (124) of the housing (120), and the second shaft (141) can rotate relatively by a predetermined angle until the other end of the key (143) formed on the second shaft (141) comes into contact with the other end of the groove (153) formed on the inner ring (151). While the second shaft (141) and the inner ring (151) rotate relatively, the angular velocity of the inner ring (151) can be faster than the angular velocity of the second shaft (141).

[0058] While the one-way bearing (1500) and the housing (120) are coupled, the housing (120) and the first shaft (131) may not restrict each other's movements. At this time, the first bevel gear (132) rotates in a first direction opposite to the rotational direction of the second bevel gear (142) by the third bevel gear (160), and the first shaft (131) rotates in the same direction as the first bevel gear (132) coupled to the first shaft (131).

[0059] As described above, the transmission (100) includes a housing (120) that can rotate in the same direction as the rotation direction of the input shaft (110) in conjunction with the rotation of the input shaft (110), a first shaft (131) that can rotate selectively in conjunction with the rotation of the housing (120) depending on the rotation direction of the housing (120), and a one-way bearing (150) that selectively transmits power to a second shaft (141) depending on the rotation direction of the housing (120), so that the first shaft (131) and the second shaft (141) can have a structure that can always output rotation in the same direction regardless of the rotation direction of the input shaft (110) and the housing (120), so that even if the rotation direction of the input shaft (110) is switched, a single-directional output is possible while minimizing power loss.

[0060] Meanwhile, the roller (200) is configured to rotate while contacting the guide rail (10) according to the movement of the elevator car (20) by rotating the input shaft (110) of the transmission (100). As an example, the generator (A) may further include a support structure (500) that is coupled to the upper or lower part of the elevator car (20) and to which the transmission (100), the roller (200), the generator (300), etc. are fixed. This support structure (500) may include a fixed support formed vertically to face the guide rail (10) and a roller support provided side by side on at least one side of the fixed support.

[0061] The input shaft (110) of the transmission (100) may be provided to pass through a roller support provided on one side of the fixed support, and the roller (200) may be provided to be coupled with the end of the input shaft (110) located on the outer side of the fixed support and to be in contact with the guide rail (10). Accordingly, when the elevator car (20) rises, the roller (200) moves along the guide rail (10) and rotates in one direction (forward rotation), and when the elevator car (20) descends, the roller (200) moves along the guide rail (10) and rotates in the other direction (reverse rotation).

[0062] And, for stable rotation, the rollers (200) can be arranged on each side of the guide rail (10), and only one roller (200) can be coupled with the input shaft (110) of the transmission (100). In this case, when two rollers (200) are provided, roller supports can be provided on each side of the fixed support.

[0063] Meanwhile, the generator (A) may further include an elastic pressure member (400) that allows the rollers (200) arranged on both sides of the guide rail (10) to be in close contact with the guide rail (10) even when shaking occurs while the elevator car (20) is raised or lowered.

[0064] The elastic pressure member (400) may include, for example, a guide rod in the shape of a rod and arranged to penetrate the roller support, with one end fixed to the fixed support and the other end positioned outside at a predetermined distance from the roller support, an elastic spring whose one end is in contact with the roller support and surrounds the vicinity of the other end of the guide rod to apply an elastic force toward the fixed support, and an elastic adjustment member coupled to the vicinity of the other end of the guide rod to support the other end of the elastic spring. Since the elastic spring applies an elastic force to adhere the roller support to the fixed support even when the elevator car (20) shakes, the input shaft (110) penetrating the roller support and the roller (200) coupled with the input shaft (110) are also affected by the elastic force, so that the roller (200) can adhere to the guide rail (10).

[0065] Meanwhile, the generator (300) is coupled to the output shaft (170) of the transmission (100) and receives rotational force from the output shaft (170) to produce electric power. When the elevator car (20) rises and the input shaft (110) rotates forward, as well as when the elevator car (20) descends and the input shaft (110) rotates backward, the output shaft (170) is rotated in the same direction (forward) by the transmission (100), so that electric power can be continuously produced according to the elevation of the elevator car (20).

[0066] And the present invention may further include a power cable (B) that transmits power generated from a generator (300) and a controller (C) that controls the generated power.

[0067] The power cable (B) may be configured to be integral with a driving cable that is fixedly connected at one end to an elevator car (20) as illustrated in FIG. 1 and connected to a machine room provided above or below the hoistway, and serves to transmit power generated from a generator (300). In addition, the controller (C) may be provided in the machine room as illustrated in FIG. 1, and may receive power from the power cable (40) and perform MPPT (Maximum Power Point Tracking) control. In addition, the controller (C) may control the generated power to be used as the elevator's own power as illustrated in FIG. 17, or may control the generated power to be used as the required power in the building, and may also control the ESS (Energy Storage System) to be charged so that the power can be used when necessary.

[0068] The elevator bidirectional power generation system of the present invention as described above can be easily applied to newly installed elevators as well as existing elevators, thereby increasing the convenience of installation and construction, and can be installed at low cost / low load compared to expensive power supply construction costs, generating electricity when the elevator ascends and descends, and the generated electricity can be utilized in various ways such as in elevators, buildings, and ESS.

[0069] [Explanation of symbols]

[0070] A: Generator B: Power cable

[0071] C: Controller

[0072] 10: Guide rail 20: Elevator car

[0073] 100: Transmission 110: Input shaft

[0074] 111: Home 120: Housing

[0075] 121: Protrusion 124: Spiral key

[0076] 130: 1st axial section 131: 1st axle

[0077] 132: 1st bevel gear 133: Screw part

[0078] 140: Second driven section 141: Second axis

[0079] 142: 2nd bevel gear 143: Kibu

[0080] 150: One-way bearing 151: Inner ring

[0081] 152: Outer ring 153: Home part

[0082] 154: Spiral groove 160: Third bevel gear

[0083] 170: Output shaft

[0084] 200: Roller

[0085] 300: Generator

[0086] 400: Elastic pressure member

[0087] 500: Support structure

Claims

1. Including a power generator (A) installed at least at one of the top or bottom of an elevator car (20) that ascends and descends along a guide rail (10) installed vertically along an elevator shaft within a building; The above-mentioned generator (A) comprises a roller (200) that rotates while in contact with a guide rail (10) according to the movement of the elevator car (20); A transmission (100) that allows the output shaft (170) to rotate in the same direction when the input shaft (110) combined with the above roller (200) rotates forward or reversely; Including a generator (300) that receives rotational power from the output shaft (170) of the above transmission (100) and produces electric power; The above generator (A) is an elevator bidirectional power generation system characterized in that it can produce power when the elevator car (20) rises and falls by means of a transmission (100).

2. In paragraph 1, The above rollers (200) are arranged on both sides of the guide rail (10), and one of them is coupled with the input shaft (110) of the transmission (100). An elevator bidirectional power generation system, characterized in that the above-mentioned power generation device (A) further includes an elastic pressure member (400) that applies elastic force to cause the roller (200) to adhere to the guide rail (10).

3. In paragraph 1, An elevator bidirectional power generation system characterized in that the input shaft (110) and the output shaft (120) of the above transmission (100) are formed with a structure capable of bending in multiple directions.

4. In paragraph 1, An elevator bidirectional power generation system characterized in that the above-mentioned power generation device (A) is provided near the guide rails (10) arranged on both sides at the top and bottom of the elevator car (20).

5. In paragraph 1, A power cable (B) that is fixedly connected at one end to the elevator car (20) and forms an integral part with a driving cable connected to a machine room provided at the upper or lower side of the elevator shaft and transmits power generated from a generator (300); An elevator bidirectional power generation system characterized by further including a controller (C) installed in the machine room and receiving power from a power cable (40) and performing MPPT (Maximum power point tracking) control.

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