Elevator brake energy harvesting device

Abstract

The application discloses an elevator braking energy collecting device and relates to the technical field of elevator kinetic energy recovery. The device comprises a braking module installed on the top or bottom of an elevator car; the braking module is in transmission connection with a direct-current generator A arranged on the top or bottom of the elevator car; the end of the direct-current generator A is connected with a CVT gearbox; the braking module comprises a vertically arranged rectangular frame, the opposite two side walls of the rectangular frame are provided with convex columns, the convex columns are rotatably connected with swing arms, the end of the swing arm is rotatably assembled with a mounting shaft through a bearing, the mounting shaft is fitted with a friction roller rolling along the elevator guide rail and a transmission wheel A; a transmission shaft is rotatably arranged between the two convex columns through a bearing, and the transmission shaft is provided with a transmission wheel B in transmission connection with the transmission wheel A. The braking module is arranged on the top and / or bottom of the elevator car to drive the rotation of the direct-current generator A, so that the device can generate electricity in the whole process of the elevator descending.

Description

Technical Field

[0001] This invention belongs to the field of elevator kinetic energy recovery technology, and in particular relates to an elevator braking energy harvesting device. Background Technology

[0002] An elevator is a permanent transportation device that serves several specific floors within a building, with its car moving on at least two rigid tracks perpendicular to the horizontal plane or at an angle of less than 15° to the vertical. The elevator's upward and downward movement is entirely driven by a motor on the roof. However, during the downward movement, the kinetic energy generated cannot be recovered and reused, resulting in resource waste.

[0003] For example, CN202609736U discloses a bidirectional energy storage hydraulic elevator, including a car and a hydraulic device for driving the car. The hydraulic device includes a hydraulic cylinder, in which a hydraulic piston is fixedly connected to the car. The hydraulic piston has hydraulic chambers on both its upper and lower sides, namely an upper hydraulic chamber and a lower hydraulic chamber, which are sealed to each other. Both the upper and lower hydraulic chambers are connected to a hydraulic accumulator. As disclosed in CN104401862B, an energy-saving device for escalators includes an upward staircase transmission chain and a downward staircase transmission chain, as well as an energy recovery, storage, and utilization transmission chain. One end of this transmission chain is connected to the downward staircase transmission chain, and the other end is connected to the upward staircase transmission chain. A heavy-weight hydraulic energy storage device is located in the middle. The energy recovery, storage, and utilization transmission chain first converts the gravitational potential energy of the people in the downward staircase into hydraulic energy and stores it in the hydraulic energy storage device. Then, through the energy release of the hydraulic energy storage device and the hydraulic motor connected to it, it is converted into kinetic energy, driving the upward staircase to move continuously, thus recovering and reusing the gravitational potential energy of the people in the downward staircase. However, in practical applications, this energy recovery method using a hydraulic energy storage device suffers from the limitation that the energy recovery range is affected by the hydraulic cylinder itself, meaning that it can only recover energy at a certain height, resulting in slow overall recovery efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an elevator braking energy harvesting device, which generates electricity throughout the entire process of the elevator's descent by installing a braking module that drives a DC generator A to rotate at the top and / or bottom of the elevator car, thereby solving the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to an elevator braking energy harvesting device, comprising a braking module installed on the top or bottom of an elevator car; the braking module is drivenly connected to a DC generator A installed on the top or bottom of the elevator car; a CVT gearbox is connected to the end of the DC generator A; a battery installed at any location inside the elevator car is electrically connected to the DC generator A; the braking module includes a vertically arranged rectangular frame, with protruding pillars on opposite side walls within the rectangular frame, and a swing arm rotatably connected to each protruding pillar; the end of the swing arm is rotatably mounted with a mounting shaft via a bearing. The mounting shaft is fitted with a friction roller that rolls along the elevator guide rail and a transmission wheel A; a transmission shaft is rotatably mounted between the two protrusions via a bearing, and a transmission wheel B connected to the transmission wheel A is mounted on the transmission shaft; it also includes a drive mechanism for controlling the swing arm to swing towards or away from the elevator guide rail; when the elevator car moves downward in the vertical direction, the drive mechanism drives the swing arm to swing towards the elevator guide rail until the friction roller contacts the elevator guide rail and rolls under the action of friction; when the elevator car moves upward in the vertical direction, the drive mechanism drives the swing arm to swing away from the elevator guide rail.

[0007] Furthermore, when the braking module is installed on the top of the elevator car, the DC generator A is installed on the top of the elevator car, and the swing arms on both sides of the elevator car are arranged in an inverted "V" shape; when the braking module is installed at the bottom of the elevator car, the DC generator A is installed at the bottom of the elevator car, and the swing arms on both sides of the elevator car are arranged in an "V" shape.

[0008] Furthermore, a braking module is provided on both the top or bottom sides of the elevator car, there are two DC generators A, and the ends of the DC generators A are connected to CVT gearbox A, and a drive wheel is fixed on the output shaft of the CVT gearbox A; the drive wheel is connected to a driven wheel provided on the transmission shaft.

[0009] Furthermore, when the braking module is installed on the top of the elevator car, the drive mechanism includes telescopic module B and telescopic module C respectively located above and below the swing arm. Both telescopic modules B and C have push rods connected to their ends. Each push rod has two spherical ends that cooperate with the swing arm. Arc-shaped grooves that cooperate with the spherical ends are provided on both sides of the swing arm along its length. A protrusion A is provided on one side of a rectangular frame located above the swing arm. A limiting rod A is provided between the two protrusions A to limit the maximum upward swing distance of the push rod located at the end of telescopic module B. A positioning insertion hole A is provided on the outer side of the swing arm. The inner wall of protrusion A is provided with a telescopic positioning rod A that can be inserted into the positioning hole A; the inner wall of protrusion A is provided with a piston cavity C, and the inner wall of piston cavity C is provided with a mounting ring C. One side of the mounting ring C is connected to a piston C that moves along the inner wall of piston cavity A through a spring C; the piston C is connected to the positioning rod A; the bottom of protrusion A is also provided with a piston cavity D, the inner wall of piston cavity D is provided with a mounting ring D, and one side of the mounting ring D is connected to a piston D that moves along the inner wall of piston cavity D through a spring D; the piston D is connected to a connecting rod A; the output end of the telescopic module B is connected to an L-shaped rod A that is connected to the connecting rod A.

[0010] Furthermore, when the braking module is installed at the bottom of the elevator car, the drive mechanism includes a telescopic module B. The end of the telescopic module B is connected to a movable rod that moves along the surface of a parallel rectangular frame. Guide sleeves are respectively provided at both ends of the movable rod. A guide rod that cooperates with the guide sleeve is provided between the protruding column and one side wall of the rectangular frame. The telescopic module B is controlled to extend and drive the movable rod to move up and down. The movable rod abuts against the bottom side of the swing arm.

[0011] Furthermore, a protrusion B is provided on one side of the rectangular frame, and a limiting rod B is provided between the two protrusions B to limit the maximum downward swing distance of the movable rod; a positioning hole B is provided on the outer side of the swing arm; and a telescopic positioning rod B is provided on the inner side wall of the protrusion B, which can be inserted into the positioning hole B.

[0012] Furthermore, the inner wall of the protrusion B is provided with a piston cavity A, and the inner wall of the piston cavity A is provided with a mounting ring A. One side of the mounting ring A is connected to a piston A that moves along the inner wall of the piston cavity A via a spring A. The piston A is connected to a positioning rod B. The top of the protrusion B is also provided with a piston cavity B, the inner wall of the piston cavity B is provided with a mounting ring B, and one side of the mounting ring B is connected to a piston B that moves along the inner wall of the piston cavity B via a spring B. The piston B is connected to a connecting rod B. The top of the guide sleeve is provided with an L-shaped rod B that is connected to the connecting rod B.

[0013] Furthermore, it also includes a DC generator B located directly below the elevator counterweight module and electrically connected to the battery. The output end of the DC generator B is connected to a CVT gearbox B. The output end of the CVT gearbox B is equipped with a winding wheel via a one-way self-locking bearing. A traction rope is wound and fixed on the winding wheel, and the end of the traction rope is connected to the bottom of the elevator counterweight module. When the elevator car moves vertically downward, the elevator counterweight module moves upward. At this time, the traction rope is released from the winding wheel and drives the DC generator B to generate electricity. At this time, the one-way self-locking bearing does not rotate.

[0014] Furthermore, it also includes a drive module that drives the winding wheel to rotate and wind the traction rope onto the winding wheel when the elevator car moves upward vertically and the elevator counterweight module moves downward; one side of the winding wheel is integrally formed with a pulley A, and it also includes a drive motor, the end of which is provided with a pulley B, the pulley B and the pulley A are connected by a transmission belt, and it also includes a tensioning pulley disposed between the pulley B and the pulley A, the tensioning pulley being fitted and installed at the end of a telescopic cylinder; when the drive motor is started, the pulley A rotates, driving the one-way self-locking bearing to rotate.

[0015] Furthermore, a belt fixing mechanism is also provided; the belt fixing mechanism includes two sets of fixing modules respectively set at pulley B and pulley A; the fixing module includes a vertically set fixing rod, and two fixing structures are respectively set on one side of the fixing rod; the fixing structure includes a rectangular frame for the transmission belt to pass through, and a support rod supported on the bottom of the transmission belt is set in the rectangular frame.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention achieves power generation throughout the entire process of the elevator descending by installing a braking module that drives the DC generator A to rotate at the top and / or bottom of the elevator car; at the same time, a DC generator B is installed below the elevator counterweight module to achieve power generation throughout the entire process of the elevator ascending.

[0018] 2. The invention utilizes the rolling power generation of friction rollers, which not only increases the descent resistance of the elevator car and facilitates the conversion of the elevator car's potential energy into kinetic energy, but also facilitates the protection of the motor that drives the elevator car's up and down movement, reduces the load on the motor, and thus improves the stability and service life of the lifting system.

[0019] 3. During the use of this invention, when the swing arm swings downwards to abut against the limit rod B, the friction roller disengages from the elevator guide rail, and the positioning rod B is inserted into the positioning hole B to prevent the swing arm from swinging due to the vibration of the elevator car.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the installation structure of the elevator braking energy harvesting device of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the installation structure of the elevator braking energy harvesting device of the present invention. Figure 2 ;

[0024] Figure 3 for Figure 1 Enlarged view of a section at point B in the middle;

[0025] Figure 4 for Figure 1 Enlarged view of a portion of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the braking module structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure between the DC generator B and the drive motor of the present invention;

[0028] Figure 7 This is a schematic diagram of the protrusion A structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the protrusion B structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the belt fixing mechanism of the present invention;

[0031] Figure 10 This is a schematic diagram of the connection structure between the DC generator A and the two braking modules of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0034] Please see Figure 1 As shown, the present invention is an elevator braking energy harvesting device, including a braking module 1 installed at the bottom of the elevator car 1b, as follows: Figure 3 and 5 The braking module 1 includes a rectangular frame 11 fixed vertically on the bottom side of the elevator car 1b. Within the rectangular frame 11, two protrusions 12 are respectively mounted on opposite side walls. A swing arm 13 is rotatably connected to each protrusion 12. A mounting shaft 10 is rotatably mounted at the end of each swing arm 13 via a bearing. A friction roller 101 that rolls along the elevator guide rail 1a and a transmission wheel A102 are mounted on the mounting shaft 10. A transmission shaft 120 is rotatably mounted between the two protrusions 12 via a bearing. A transmission wheel B121, which is connected to the transmission wheel A102, is mounted on the transmission shaft 120. A DC generator A1c is also located at the bottom of the elevator car 1b. A CVT gearbox is connected to the end of the DC generator A1c. The internal structure of the CVT gearbox A is electrically connected to a battery located at any position inside the elevator car 1b. A drive wheel 104 is fixed on the output shaft of the CVT gearbox A. The drive wheel 104 is connected to a driven wheel 122 on the drive shaft 120. When the elevator car 1b descends, the friction roller 101 rolls along the elevator guide rail 1a, causing the drive wheel A102 to rotate. The drive wheel A102 causes the drive wheel B121 to rotate, and the drive wheel B121 causes the driven wheel 122 to rotate as a whole. At the same time, the rotation of the driven wheel 122 causes the drive wheel 104 fixed on the output shaft of the CVT gearbox A to rotate, thereby controlling the rotation of the DC generator A1c to generate electricity.

[0035] In the above-described process, the mounting shaft 10 rotates around the transmission shaft 120 during use, thus maintaining a constant distance between the mounting shaft 10 and the transmission shaft 120. This ensures that the transmission chain length between the transmission wheels A102 and B121 remains unchanged, ultimately facilitating the control of the mounting shaft 10 to maintain the transmission connection between the transmission wheels A102 and B121 during its swing. Simultaneously, the invention utilizes the rolling power generation of the friction roller 101, which not only increases the descent resistance of the elevator car 1b, facilitating the conversion of the elevator car 1b's potential energy into kinetic energy, but also protects the motor driving the elevator car 1b's vertical movement, reducing the motor's load and thereby improving the stability and service life of the lifting system.

[0036] Of course, the present invention only realizes kinetic energy recovery during the downward movement of the elevator car 1b. Based on this, during the upward movement of the elevator car 1b, it is necessary to control the friction roller 101 to disengage from the elevator guide rail 1a. That is, it is necessary to set up a drive mechanism to drive the swing arm 13 to swing towards or away from the elevator guide rail 1a.

[0037] It is known that, in a specific implementation, such as Figure 5 The drive mechanism includes a telescopic module B2. The end of the telescopic module B2 is connected to a movable rod 21 that moves along the surface of the parallel rectangular frame 11. Guide sleeves 22 are respectively provided at both ends of the movable rod 21. A guide rod 121 that cooperates with the guide sleeves 22 is provided between the protruding post 12 and one side wall of the rectangular frame 11. The telescopic module B2 is extended to drive the movable rod 21 to move up and down. The movable rod 21 abuts against the bottom side of the swing arm 13. In the above, the telescopic module B2 extends and abuts against one side of the movable rod 21 to drive the movable rod 21 to move up and down. The movable rod 21 abuts against the bottom side of the two swing arms 13 to drive the swing arms 13 to swing.

[0038] Of course, due to phenomena such as the elevator car 1b stopping during its upward movement, the swing arm 13 is prone to swaying in its non-fixed state. Therefore, as follows... Figure 8 The present invention provides a protrusion B110 on one side of the rectangular frame 11, and a limiting rod B111 between the two protrusions B110 to limit the maximum downward swing distance of the movable rod 21; a positioning hole B131 is provided on the outer side of the swing arm 13; a telescopic positioning rod B112 is provided on the inner side wall of the protrusion B110 and can be inserted into the positioning hole B131; the invention achieves that when the swing arm 13 swings downward to abut against the limiting rod B111, the friction roller 101 disengages from the elevator guide rail 1a, and at the same time the positioning rod B112 is inserted into the positioning hole B131, so as to prevent the swing arm 13 from swinging due to the vibration of the elevator car 1b.

[0039] To facilitate control of the movement of the positioning rod B112, it should be noted that when the swing arm 13 contacts the limiting rod B111, the positioning rod B112 has not yet been inserted into the positioning socket B131. It continues until the telescopic module B2 retracts further, at which point the positioning rod B112 slowly extends and inserts into the positioning socket B131. Based on this purpose, the present invention provides a structure in which a piston cavity A114 is provided on the inner wall of the protrusion B110, and a mounting ring A1140 is provided on the inner wall of the piston cavity A114. One side of the mounting ring A1140 is connected to a piston A115 that moves along the inner wall of the piston cavity A114 via a spring A1141. The piston A115 is connected to the positioning rod B112. The protrusion B110... The top is also provided with a piston chamber B116, and an installation ring B1160 is provided on the inner wall of the piston chamber B116. One side of the installation ring B1160 is connected to a piston B117 that moves along the inner wall of the piston chamber B116 via a spring B1161. The piston B117 is connected to a connecting rod B118. The top of the guide sleeve 22 is provided with an L-shaped rod B221 that is connected to the connecting rod B118. That is, during the extension of the telescopic module B2, the change in air pressure and volume of the sealed space formed by the piston chamber A114 and the piston chamber B116 is used to drive the positioning rod B112 to move into the piston chamber A114. When the telescopic module B2 is retracted, the positioning rod B112 is driven to extend out of the piston chamber A114.

[0040] It is known that in another implementation, such as Figure 1 A braking module 1 is provided on both sides of the bottom of the elevator car 1b. There are two DC generators A1c, and the ends of the DC generators A1c are connected to the CVT gearbox A. At the same time, the DC generators A1c are located at the bottom of the elevator car 1b, and the swing arms 13 located on both sides of the elevator car 1b are arranged in a figure-eight shape.

[0041] It is understandable that in some other implementations, such as Figure 1 and 4 When the braking module 1 is installed on the top of the elevator car 1b, the DC generator A1c is also installed on the top of the elevator car 1b. At this time, the swing arms 13 on both sides of the elevator car 1b are arranged in an inverted "V" shape. The drive mechanism includes telescopic modules B3 and C4 respectively located above and below the swing arms 13. Both telescopic modules B3 and C4 have push rods 41 connected to their ends. Each push rod 41 has two spherical heads 42 that cooperate with the swing arms 13. Arc-shaped grooves that cooperate with the spherical heads 42 are provided along the length of both sides of the swing arms 13. Figure 7A protrusion A1101 is provided on one side of the rectangular frame 11 above the swing arm 13. A limiting rod A1102 is provided between the two protrusions A1101 to limit the maximum upward swing distance of the push rod 41 at the end of the telescopic module B3. A positioning hole A1311 is provided on the outer side of the swing arm 13. A telescopic positioning rod A1121 is provided on the inner wall of the protrusion A1101 and can be inserted into the positioning hole A1311. A piston cavity C1103 is provided on the inner wall of the protrusion A1101, and an mounting ring C1104 is provided on the inner wall of the piston cavity C1103. A piston C1106, which moves along the inner wall of piston cavity A1104, is connected to one side of mounting ring C1104 via spring C1105; piston C1106 is connected to positioning rod A1121; a piston cavity D1107 is also provided at the bottom of protrusion A1101, and mounting ring D1108 is provided on the inner wall of piston cavity D1107. A piston D1112, which moves along the inner wall of piston cavity D1107, is connected to one side of mounting ring D1108 via spring D1109; piston D1112 is connected to connecting rod A1110; the output of telescopic module B3... An L-shaped rod A1111 is connected to the connecting rod A1110 at one end. Based on this, by utilizing the cooperation of telescopic modules B3 and C4, the friction roller 101 is kept in close contact with the elevator guide rail 1a and rolls along the elevator guide rail 1a during the kinetic energy recovery stage. When the elevator car 1b moves upward, the telescopic module C4 is extended, and the telescopic module B3 is retracted, thereby driving the swing arm 13 to swing upward. Of course, to avoid the swing arm 13 from swinging due to the vibration of the elevator car 1b, the control is to drive the swing arm 13 to swing upward until it touches the ground. On the limit rod A1102, the telescopic module B3 continues to retract, and the air pressure change in the closed space formed by the piston chamber C1103 and piston chamber D1107 causes the positioning rod A1121 to extend and insert into the positioning socket A1311; when it is necessary to drive the swing arm 13 to swing downward, the telescopic module B3 is first driven to extend until the positioning rod A1121 slides out of the positioning socket A1311, and then the telescopic module C4 is driven to retract until the friction roller 101 is in close contact with the elevator guide rail 1a, and then the telescopic module B3 is driven to extend again.

[0042] It is understood that in some other embodiments, a power generation mechanism consisting of a DC generator A1c and a braking module 1 may be installed at both the top and bottom of the elevator car 1b.

[0043] Meanwhile, since the existing elevator includes not only the elevator car 1b but also an elevator counterweight module 1d, based on this, during the elevator's descent, the elevator counterweight module 1d descends. In order to recover kinetic energy during the elevator's descent, such as... Figure 6In this invention, a DC generator B1e electrically connected to a battery is disposed directly below the elevator counterweight module 1d. The output end of the DC generator B1e is connected to a CVT gearbox B. The output end of the CVT gearbox B is fitted with a winding wheel 14 via a one-way self-locking bearing. A traction rope 141 is wound and fixed on the winding wheel 14, and the end of the traction rope 141 is connected to the bottom of the elevator counterweight module 1d. When the elevator car 1b moves downward in the vertical direction, the elevator counterweight module 1d moves upward. At this time, the traction rope 141 is released from the winding wheel 14 and drives the DC generator B1e to generate electricity. At this time, the one-way self-locking bearing does not rotate. When the elevator counterweight module 1d moves upward, the traction rope 141 drives the CVT gearbox B to rotate, thereby driving the DC generator B1e to generate electricity.

[0044] It should be noted that after the elevator counterweight module 1d completes one upward movement, when the elevator counterweight module 1d descends, the existing CVT transmission B cannot automatically retract and wind the traction rope 141. Therefore, this invention provides a method for retracting and winding the traction rope 141. Specifically, when the elevator car 1b moves vertically upward and the elevator counterweight module 1d moves downward, the drive winding wheel 14 rotates to the drive module that winds the traction rope 141 onto the winding wheel 14; as... Figure 6 One side of the winding wheel 14 is integrally formed with a pulley A142. The drive module includes a drive motor 16. The end of the drive motor 16 is provided with a pulley B161. The pulley B161 and the pulley A142 are connected by a transmission belt 160.

[0045] Of course, during the upward movement of the elevator counterweight module 1d, in order to reduce resistance, it is necessary to prevent the winding wheel 14 from rotating and driving the drive motor 16 to rotate. Therefore, the transmission belt 160 needs to be tensioned. Specifically, a tensioning wheel 144 is set between the pulley B161 and the pulley A142. The tensioning wheel 144 is installed at the end of a telescopic cylinder 145. When the drive motor 16 is started, the pulley A142 rotates and drives the one-way self-locking bearing to rotate.

[0046] Of course, such as Figure 9 To prevent the transmission belt 160 from falling off pulley B161 and / or pulley A142 when it is in a slack state, a belt fixing mechanism is also provided. The belt fixing mechanism includes two sets of fixing modules respectively set at pulley B161 and pulley A142. The fixing module includes a vertically set fixing rod 17, and two fixing structures are respectively set on one side of the fixing rod 17. The fixing structure includes a rectangular frame 171 through which the transmission belt 160 passes, and a support rod 172 supporting the bottom of the transmission belt 160 is set inside the rectangular frame 171.

[0047] In this invention, when it is determined that the elevator car 1b is moving downwards in the vertical direction, the controller controls the drive mechanism to drive the swing arm 13 to swing towards the side closer to the elevator guide rail 1a until the friction roller 101 contacts the elevator guide rail 1a and rolls under the action of friction. At this time, the rotation of the friction roller 101 drives the mounting shaft 10 to rotate, and then the transmission wheel A102 set on the mounting shaft 10 drives the transmission wheel B121 to rotate. The rotation of the transmission wheel B121 drives the transmission shaft 120 located between the two protrusions 12 to rotate. The rotation of the transmission shaft 120 drives the driven wheel 122 set on the transmission shaft 120. Then, the driven wheel 122 drives the drive wheel 104 of the CVT gearbox A to rotate, and then drives the DC generator A1c to rotate, thereby realizing kinetic energy recovery and power generation. In actual use, the transmission ratio between the transmission shaft 120 and the DC generator A1c can be controlled by detecting the weight of the elevator car 1b and the load inside the elevator car 1b.

[0048] Specifically, assuming the weight m1 of the elevator car 1b remains constant, the transmission ratio between the drive shaft 120 and the DC generator A1c is adjusted according to the change in the load m2 inside the elevator car 1b. For example, when m2 changes to m3, the transmission ratio changes from the initial k1 to k2; when m3 > m2, k1 > k2; when m3 < m2, k1 < k2. That is, the transmission ratio between the drive shaft 120 and the DC generator A1c is negatively correlated with the load inside the elevator car 1b.

[0049] Of course, in another specific implementation, such as Figure 10 A DC generator A1c can be used. At this time, a bracket is set on one side of the end of the CVT gearbox A, and a driven shaft 61 is set on the bracket. A drive wheel C62 and a drive wheel D63 are set on the driven shaft 61, and a drive wheel 14 and a drive wheel E1400 are installed on the output shaft of the CVT gearbox A, and the drive wheel D63 and the drive wheel E1400 are connected in a transmission.

[0050] During installation, the driven wheel 122 on one braking module 1 is connected to the driving wheel 14, and the transmission ratio between the driven wheel 122 and the driving wheel is k3. The driven wheel 122 on another braking module 1 is connected to the transmission wheel C62, and then the transmission wheel D63 and the transmission wheel E1400 are used to drive the output shaft of the CVT gearbox A to rotate. The input shaft of the CVT gearbox A drives the DC generator A1c to rotate. Here, the transmission ratio between the driven wheel 122 and the transmission wheel C62 is 1, and the transmission ratio between the transmission wheel D63 and the transmission wheel E1400 is k4, where k3 = k4.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An elevator braking energy harvesting device, characterized in that: Including a braking module (1) installed on the top of the elevator car (1b) or at the bottom of the elevator car (1b); The braking module (1) is connected to a DC generator A (1c) installed at the top or bottom of the elevator car (1b); the end of the DC generator A (1c) is connected to a CVT gearbox; the DC generator A (1c) is also electrically connected to a battery installed at any position inside the elevator car (1b). The braking module (1) includes a vertically arranged rectangular frame (11). The rectangular frame (11) has protruding columns (12) on opposite side walls. A swing arm (13) is rotatably connected to the protruding column (12). The end of the swing arm (13) is rotatably mounted with a mounting shaft (10) via a bearing. A friction roller (101) that rolls along the elevator guide rail (1a) and a transmission wheel A (102) are mounted on the mounting shaft (10). A drive shaft (120) is rotatably mounted between the two protrusions (12) via a bearing, and a drive wheel B is provided on the drive shaft (120) and is connected to the drive wheel A (102) for transmission. It also includes a drive mechanism that controls the swing arm (13) to swing toward or away from the elevator guide rail (1a); When the elevator car (1b) moves downward in the vertical direction, the drive mechanism drives the swing arm (13) to swing towards the side closer to the elevator guide rail (1a) until the friction roller (101) contacts the elevator guide rail (1a) and rolls under the action of friction. When the elevator car (1b) moves upward in the vertical direction, the drive mechanism drives the swing arm (13) to swing away from the elevator guide rail (1a); When the braking module (1) is installed on the top of the elevator car (1b), the swing arms (13) located on both sides of the elevator car (1b) are arranged in an inverted "V" shape; when the braking module (1) is installed on the top of the elevator car (1b), the driving mechanism includes telescopic module B (3) and telescopic module C (4) respectively arranged above and below the swing arm (13), the ends of the telescopic module B (3) and the telescopic module C (4) are connected to push rods (41), the push rods (41) are provided with a top head (42) that cooperates with the swing arm (13) and whose end is set as a spherical structure, and the two sides of the swing arm (13) are provided with arc-shaped grooves that cooperate with the top head (42) along the length direction; A protrusion A (1101) is provided on one side of the rectangular frame (11) above the swing arm (13), and a limiting rod A (1102) is provided between the two protrusions A (1101) to limit the maximum upward swing distance of the push rod (41) at the end of the telescopic module B (3). The outer side of the swing arm (13) is provided with a positioning hole A (1311); the inner side wall of the protrusion A (1101) is provided with a telescopic positioning rod A (1121) that can be inserted into the positioning hole A (1311); The inner wall of the protrusion A (1101) is provided with a piston cavity C (1103), and the inner wall of the piston cavity C (1103) is provided with a mounting ring C (1104). One side of the mounting ring C (1104) is connected to a piston C (1106) that moves along the inner wall of the piston cavity C (1103) via a spring C (1105); the piston C (1106) is connected to a positioning rod A (1121). The bottom of the protrusion A (1101) is also provided with a piston chamber D (1107). The inner wall of the piston chamber D (1107) is provided with an installation ring D (1108). One side of the installation ring D (1108) is connected to a piston D (1112) that moves along the inner wall of the piston chamber D (1107) via a spring D (1109). The piston D (1112) is connected to a connecting rod A (1110). The output end of the telescopic module B (3) is connected to an L-shaped rod A (1111) that is connected to the connecting rod A (1110).

2. The elevator braking energy harvesting device according to claim 1, characterized in that, When the braking module (1) is installed at the bottom of the elevator car (1b), the DC generator A (1c) is installed at the bottom of the elevator car (1b), and the swing arms (13) on both sides of the elevator car (1b) are arranged in a figure-eight shape. The driving mechanism includes a telescopic module B (2), and the end of the telescopic module B (2) is connected to a movable rod (21) that moves along the surface of the parallel rectangular frame (11). Guide sleeves (22) are respectively provided at both ends of the movable rod (21). A guide rod that cooperates with the guide sleeve (22) is provided between the protruding post (12) and one side wall of the rectangular frame (11). The telescopic module B (2) is controlled to extend and drive the movable rod (21) to move up and down. The movable rod (21) abuts against the bottom side of the swing arm (13). A protrusion B (110) is provided on one side of the rectangular frame (11), and a limiting rod B (111) is provided between the two protrusions B (110) to limit the maximum downward swing distance of the movable rod (21); a positioning hole B (131) is provided on the outer side of the swing arm (13); a telescopic positioning rod B (112) is provided on the inner side wall of the protrusion B (110) and can be inserted into the positioning hole B (131); The inner wall of the protrusion B (110) is provided with a piston cavity A (114), and the inner wall of the piston cavity A (114) is provided with a mounting ring A (1140). One side of the mounting ring A (1140) is connected to a piston A (115) that moves along the inner wall of the piston cavity A (114) via a spring A (1141); the piston A (115) is connected to a positioning rod B (112). The top of the protrusion B (110) is also provided with a piston cavity B (116), and the inner wall of the piston cavity B (116) is provided with an installation ring B (1160). One side of the installation ring B (1160) is connected to a piston B (117) that moves along the inner wall of the piston cavity B (116) by a spring B (1161). The piston B (117) is connected to a connecting rod B (118). The top of the guide sleeve (22) is provided with an L-shaped rod B (221) that is connected to the connecting rod B (118).

3. The elevator braking energy harvesting device according to claim 2, characterized in that, A braking module (1) is provided on both the top or bottom sides of the elevator car (1b). There are two DC generators A (1c), and the end of the DC generator A (1c) is connected to a CVT gearbox A. A drive wheel (104) is fixed on the output shaft of the CVT gearbox A. The driving wheel is connected to a driven wheel (122) mounted on the drive shaft (120).

4. The elevator braking energy harvesting device according to claim 3, characterized in that, It also includes a DC generator B (1e) located directly below the elevator counterweight module (1d) and electrically connected to the battery. The output end of the DC generator B (1e) is connected to a CVT gearbox B. The output end of the CVT gearbox B is equipped with a winding wheel (14) through a one-way self-locking bearing. A traction rope (141) is wound and fixed on the winding wheel (14). The end of the traction rope (141) is connected to the bottom of the elevator counterweight module (1d). When the elevator car (1b) moves downward in the vertical direction, the elevator counterweight module (1d) moves upward. At this time, the traction rope (141) is released from the winding wheel (14) and drives the DC generator B (1e) to generate electricity. At this time, the one-way self-locking bearing does not rotate.

5. The elevator braking energy harvesting device according to claim 4, characterized in that, It also includes a drive module that drives the winding wheel (14) to rotate so that the traction rope (141) is wound onto the winding wheel (14) when the elevator car (1b) moves upward in the vertical direction and the elevator counterweight module (1d) moves downward. The winding wheel (14) has a pulley A (142) integrally formed on one side, and also includes a drive motor (16). The end of the drive motor (16) is provided with a pulley B (161). The pulley B (161) and the pulley A (142) are connected by a transmission belt (160). It also includes a tension wheel (144) disposed between the pulley B (161) and the pulley A (142). The tension wheel (144) is installed in conjunction with the end of a telescopic cylinder (145). When the drive motor (16) is started, the pulley A (142) rotates to drive the one-way self-locking bearing to rotate.

6. The elevator braking energy harvesting device according to claim 5, characterized in that, A belt fixing mechanism is also provided; the belt fixing mechanism includes two sets of fixing modules respectively set at pulley B (161) and pulley A (142); The fixing module includes a vertically arranged fixing rod (17), and two fixing structures are respectively provided on one side of the fixing rod (17); the fixing structure includes a rectangular frame (171) through which the transmission belt (160) passes, and a support rod (172) supporting the bottom of the transmission belt (160) is provided inside the rectangular frame (171).

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