Energy recovery device

Abstract

The present application discloses an energy recovery device, which belongs to the field of energy recovery technology, and includes a bracket, an energy storage structure, a crane, a connecting rope, a counterweight, two grabbing structures and two sliding structures. The energy storage structure and the crane are both installed on the top of the bracket, and the connecting rope is wound around the output shaft of the crane. The grabbing structure is used to grab the counterweight, and the connecting rope or the counterweight can form a match with the energy storage structure. The energy storage structure can be used to decelerate the counterweight. The deceleration process of the counterweight is actually also the process of charging the energy storage structure. The energy stored in the energy storage structure can be used to lift the counterweight at the other end of the connecting rope to a specified height. The energy storage structure can fully utilize the energy of the counterweight when it is decelerated, thereby improving the utilization rate of gravitational potential energy. The sliding structure is slidably connected to the bracket, and the sliding structure is used to adjust its position in the horizontal direction without changing the starting height of the counterweight.

Description

Technical Field

[0001] The present invention relates to the technical field of energy recovery, and in particular to an energy recovery device. Background Art

[0002] The carbon peak and carbon neutrality targets are a global consensus for addressing climate change. Renewable energy sources such as wind power and photovoltaics are intermittent, and their generation fluctuates significantly due to meteorological conditions. This can have a significant impact on the entire power grid, especially once their direct grid connection percentage exceeds 20%. Low-cost, large-capacity, and easily sited energy storage technologies can address temporal and spatial mismatches and grid stability, and are crucial for the large-scale deployment of renewable energy. Currently available power storage technologies include mechanical, chemical, electromagnetic, and thermal storage. Pumped hydro is the most typical mechanical energy storage technology, offering large storage capacity, rapid response, and widespread application both domestically and internationally. However, pumped hydro power stations require suitable geographical conditions and water resources, limiting their application, long construction cycles, high initial investment costs, and generally around 70% energy conversion efficiency. Gravity-based energy storage, which utilizes large ground-based support structures and lifts heavy objects, offers flexible construction and theoretically achieves 90% efficiency. However, the process of the weight block descending to generate electricity is a process of acceleration-constant speed-deceleration. Usually, when the weight block is near the bottom, the brake or motor is used to slow down the weight block. The energy is not fully utilized, which reduces the utilization rate of the weight block's potential energy. Summary of the Invention

[0003] The present invention discloses an energy recovery device to improve the above problems.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] Based on the above objectives, the present invention discloses an energy recovery device, comprising:

[0006] Bracket;

[0007] An energy storage structure and a crane, wherein the energy storage structure and the crane are both installed on the support;

[0008] A connecting rope, the connecting rope being wound around the output shaft of the crane, capable of driving the connecting rope to move from one end toward the other end when the crane is in operation, and capable of driving the working shaft of the energy storage structure to rotate when the connecting rope moves from one end toward the other end;

[0009] Two grabbing structures, the two grabbing structures are respectively connected to two ends of the connecting rope;

[0010] Two sliding structures, both of which are slidably connected to the bracket, and the two sliding structures are respectively located on both sides of the energy storage structure, the connecting rope is wound around the sliding structures, and the height of the grasping structure does not change when the sliding structures drive the grasping structure to move; and

[0011] A counterweight block is used to cooperate with the energy storage structure, and the counterweight block is detachably connected to the grasping structure. When the counterweight block performs a deceleration movement, it can charge the energy storage structure.

[0012] Optionally, the grasping structure includes a connecting seat, a rotating rod, a first driving motor, and a clamping block, wherein the connecting seat is connected to the connecting rope, the rotating rod is rotatably connected to the connecting seat, the rotating rod can rotate relative to the connecting seat along the height direction of the bracket, the first driving motor is installed on the connecting seat, the first driving motor is transmission-connected to the rotating rod, the clamping block is provided at one end of the rotating rod away from the connecting seat, and the clamping block protrudes from the surface of the connecting rod in the radial direction of the rotating rod;

[0013] The counterweight block is provided with a first groove and a second groove, the first groove is arranged along the height direction of the counterweight block, the rotating rod and the clamping block are both slidably engaged with the first groove, the second groove is connected to the bottom of the first groove, and the second groove is arranged around the circumference of the first groove, and the clamping block is clamped and engaged with the second groove.

[0014] Optionally, two rotating rods are provided, and the two rotating rods are spaced apart along the length direction of the connecting seat. The grabbing structure further comprises a first limiting block and a second limiting block, wherein the first limiting block is rotatably connected to one of the clamping blocks, and the second limiting block is rotatably connected to the other clamping block. The second limiting block is arranged opposite to the first limiting block, and the second limiting block is engaged with the first limiting block.

[0015] There are two first slots, and the two first slots are arranged in one-to-one correspondence with the two rotating rods. There are two second slots, and the two second slots are arranged in one-to-one correspondence with the two clamping blocks. The counterweight block is also provided with a third slot for cooperating with the first limit block and the second limit block. There are two third slots, and the two third slots are arranged in one-to-one correspondence with the two second slots. One of the third slots is engaged with the first limit block, and the other third slot is engaged with the second limit block.

[0016] Optionally, a groove is provided at the bottom of the first limiting block, the width of the groove is smaller than the width of the first limiting block, and a protrusion for cooperating with the groove is provided on the second limiting block, and the protrusion is snap-fitted with the groove.

[0017] Optionally, a slope is provided on the counterweight block, the slope is located between the two first grooves, and both ends of the slope extend to communicate with the two first grooves respectively, and one end of the slope facing the second limit block is lower than the other end.

[0018] Optionally: a baffle is provided on the card block, the baffle is provided at the end of the card block away from the rotating rod, and the baffle is located at the bottom of the card block, and the baffle extends from the bottom of the card block to the bottom of the first limit block or the second limit block.

[0019] Optionally, the sliding structure includes:

[0020] a sliding seat, the sliding seat being slidably connected to the bracket;

[0021] A rotating shaft, wherein a gear is provided on the rotating shaft, and a first rack is provided on the bracket for cooperating with the gear, and the gear is meshed with the first rack;

[0022] a second rack, the second rack being slidably connected to the sliding seat, and the second rack being movable relative to the sliding seat along a height direction of the bracket; and

[0023] A first pulley and a second pulley, wherein the first pulley is connected to the sliding seat, the second pulley is connected to the second rack, and the connecting rope is sequentially wound around the first pulley and the second pulley.

[0024] Optionally, the energy storage structure includes a torsion spring, one end of which is connected to the bracket, and the other end of which is connected to the connecting rope. When one of the grasping structures moves in a direction away from the sliding structure, the torsion spring is tightened.

[0025] Optionally: the energy storage structure includes a box, a screw, a nut and a spring, the box is installed on the bracket, the nut is slidingly connected to the box, the screw is rotationally connected to the box, and the screw is threadedly connected to the nut, the two ends of the spring are respectively connected to the box and the nut, the connecting rope is wrapped around the screw, and when one of the grabbing structures moves in a direction away from the sliding structure, the screw rotates and causes the nut to compress the spring.

[0026] Optionally: the energy storage structure includes a connecting tube, a medium and two pistons, the pistons are slidably connected to the connecting tube, the two pistons are respectively located below the two grasping structures, the medium is located in the connecting tube, and the medium is filled between the two pistons. When one piston moves downward, the other piston is pushed upward by the medium.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The energy recovery device disclosed in the present invention utilizes an energy storage structure to achieve the deceleration of the counterweight block. The deceleration process of the counterweight block is actually also the process of charging the energy storage structure. The energy stored in the energy storage structure can be used to lift the counterweight block at the other end of the connecting rope to a specified height. The energy storage structure can fully utilize the energy of the counterweight block during deceleration, thereby improving the utilization rate of gravitational potential energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of an energy recovery device disclosed in an embodiment of the present invention is shown;

[0031] Figure 2 A cross-sectional view of the energy recovery device disclosed in an embodiment of the present invention at a sliding structure is shown;

[0032] Figure 3 A schematic diagram showing the operation of the sliding structure disclosed in an embodiment of the present invention is shown;

[0033] Figure 4 A schematic diagram of a first energy storage structure disclosed in an embodiment of the present invention is shown;

[0034] Figure 5 A schematic diagram of a second energy storage structure disclosed in an embodiment of the present invention is shown;

[0035] Figure 6 A schematic diagram of a third energy storage structure disclosed in an embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram showing the connection between the grabbing structure and the counterweight block disclosed in an embodiment of the present invention is shown;

[0037] Figure 8 A schematic diagram showing the grabbing structure disclosed in an embodiment of the present invention being engaged with a counterweight block is shown;

[0038] Figure 9 A schematic diagram showing the grabbing structure disclosed in an embodiment of the present invention when it leaves the counterweight block;

[0039] Figure 10 The embodiment of the present invention is shown Figure 9 A partial enlarged view of

[0040] Figure 11 A schematic diagram showing the cooperation between the first limiting block and the second limiting block disclosed in an embodiment of the present invention is shown;

[0041] Figure 12 A cross-sectional view of a gripping structure disclosed in an embodiment of the present invention is shown;

[0042] Figure 13 A cross-sectional view of a counterweight disclosed in an embodiment of the present invention is shown;

[0043] Figure 14 A schematic diagram showing the sliding seat disclosed in an embodiment of the present invention in the first position is shown;

[0044] Figure 15 A schematic diagram showing the sliding structure disclosed in an embodiment of the present invention in the second position is shown;

[0045] Figure 16 A partial cross-sectional view of a sliding structure disclosed in an embodiment of the present invention is shown;

[0046] Figure 17 A schematic diagram of a rotating shaft disclosed in an embodiment of the present invention is shown.

[0047] In the picture:

[0048] 100-bracket, 110-track, 120-first rack, 200-connecting rope, 210-first section, 220-second section, 230-third section, 240-fourth section, 250-fifth section, 260-sixth section, 270-seventh section, 280-eighth section, 290-ninth section, 300-grabbing structure, 310-connecting seat, 320-rotating rod, 330-block, 340-first limit block, 341-groove, 350-second limit block, 351-protrusion, 360-block, 400-slide Dynamic structure, 410-sliding seat, 420-roller, 430-rotating shaft, 431-gear, 432-bearing, 440-second rack, 450-first pulley, 460-second pulley, 500-counterweight, 510-first groove, 520-second groove, 530-third groove, 540-inclined surface, 600-crane, 700-energy storage structure, 710-torsion spring, 720-box, 730-nut, 740-screw, 750-spring, 760-connecting pipe, 770-piston, 780-medium. DETAILED DESCRIPTION

[0049] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present application disclosed in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application without making any creative efforts shall fall within the scope of protection of this application.

[0052] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0054] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of the application is usually placed when in use. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0055] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0056] Example:

[0057] See Figures 1 to 3An embodiment of the present invention discloses an energy recovery device, which includes a bracket 100, an energy storage structure 700, a crane 600, a connecting rope 200, a counterweight block 500, two grabbing structures 300 and two sliding structures 400.

[0058] The energy storage structure 700 and the crane 600 are both mounted on top of the support 100, with the connecting rope 200 wound around the output shaft of the crane 600. The grabbing structure 300 is used to grab the counterweight 500. The two grabbing structures 300 are connected to the two ends of the connecting rope 200, respectively. The connecting rope 200 or the counterweight 500 can cooperate with the energy storage structure 700, allowing the counterweight 500 to store some of its energy within the energy storage structure 700 when it decelerates. As the counterweight 500 descends, it accelerates, maintains a constant speed, and then decelerates. The energy storage structure 700 can be used to decelerate the counterweight 500. This deceleration process actually charges the energy storage structure 700. The energy stored in the energy storage structure 700 can be used to lift the counterweight 500 at the other end of the connecting rope 200 to a specified height. The energy storage structure 700 can fully utilize the energy of the counterweight 500 during deceleration, thereby improving the utilization rate of gravitational potential energy. The sliding structure 400 is slidably connected to the bracket 100 and is used to adjust the horizontal position of the counterweight 500 without changing its starting height.

[0059] In one embodiment of this invention, the energy storage structure 700 is configured as a generator. When the energy storage structure 700 is a generator, the connecting rope 200 can be wound around the generator's operating shaft. When the counterweight 500 descends, a portion of its gravitational potential energy is converted into electrical energy and stored within the generator. This electrical energy can then be used to lift other counterweights 500.

[0060] See Figure 4 In one embodiment of the present invention, the energy storage structure 700 is configured as a torsion spring 710. When the counterweight 500 descends, the torsion spring 710 is tightened. As the torsion spring 710 is tightened, the tension on the counterweight 500 increases, thereby decelerating the counterweight 500. When the torsion spring 710 releases energy, it can lift the other counterweight 500 to a certain height.

[0061] See Figure 5In one embodiment of the present invention, the energy storage structure 700 is configured as a spring 750 screw 740 structure. Specifically, the energy storage structure 700 includes a box body 720, a screw 740, a nut 730, and a spring 750. The nut 730 is slidably connected to the box body 720. The two ends of the spring 750 abut against the nut 730 and the side wall of the box body 720, respectively. The screw 740 is rotatably connected to the box body 720, and the screws 740 are threadedly connected to each other. The connecting rope 200 is wound around the screw 740. When the counterweight 500 descends, the connecting rope 200 can drive the screw 740 to rotate. The rotation of the screw 740 causes the nut 730 to compress the spring 750. As the spring 750 is compressed, the nut 730 advances more slowly, the screw 740 rotates more slowly, and the counterweight 500 descends more slowly until the counterweight 500 stops moving downward. The energy stored in the spring 750 can then be released. When the spring 750 releases the energy, the nut 730 moves outward, driving the screw 740 to rotate in the opposite direction, thereby driving the counterweight 500 on the connecting rope 200 to move upward.

[0062] See Figure 6 In one implementation of this embodiment, the energy storage structure 700 is configured as a piston 770 structure. Specifically, the energy storage structure 700 includes a connecting pipe 760, two pistons 770, and a medium 780. The connecting pipe 760 is U-shaped, the two pistons 770 are respectively located at both ends of the connecting pipe 760, and the medium 780 is located between the two pistons 770. The two pistons 770 are located just below the two grasping structures 300. When one of the counterweights 500 descends, the counterweight 500 contacts the piston 770, and as the counterweight 500 continues to descend, it can cause the other counterweight 500 to rise.

[0063] The above are only several implementations of this embodiment. In other implementations, the energy storage structure 700 may be set to other structures.

[0064] The energy storage structure 700 can be used for temporary energy storage, long-term energy storage, and timely energy conversion. For example, energy can be stored in elastic structures such as torsion springs 710 or springs 750 for temporary storage; when energy is converted into electrical energy for storage via a generator, it can form relatively long-term energy storage; when the energy storage structure 700 is configured as a piston 770, it can raise one counterweight 500 as the other counterweight 500 descends, achieving timely energy conversion and utilization.

[0065] See Figures 7 to 13In order to facilitate the grabbing and placement of the counterweight 500 , the present embodiment designs a grabbing structure 300 and the counterweight 500 . The grabbing structure 300 includes a connecting seat 310 , a rotating rod 320 , a first driving motor, and a clamping block 330 .

[0066] The top of the connecting base 310 is connected to the connecting rope 200. The rotating rod 320 is rotatably connected to the connecting base 310, with the rotating axis 430 of the rotating rod 320 being vertically arranged. A first drive motor is mounted on the top of the connecting base 310 and is in driving connection with the rotating rod 320. The first drive motor is used to drive the rotating rod 320 to rotate. A clamping block 330 is disposed at the end of the rotating rod 320 facing away from the connecting base 310. The clamping block 330 protrudes radially from the surface of the connecting rod 320.

[0067] See Figure 13 The counterweight 500 is provided with a first groove 510 and a second groove 520. The first groove 510 is arranged along the height direction of the counterweight 500. The rotating rod 320 and the clamping block 330 are both slidably engaged with the first groove 510, that is, the rotating rod 320 and the clamping block 330 can both descend along the first groove 510. The second groove 520 is connected to the bottom of the first groove 510 and is arranged around the circumference of the first groove 510. The clamping block 330 is engaged with the second groove 520. When the rotating rod 320 rotates, the blocking block 330 can enter or leave the second groove 520. When the blocking block 330 enters the second groove 520, the grabbing structure 300 and the counterweight block 500 are connected. At this time, the grabbing structure 300 can drive the counterweight block 500 to move up and down or left and right; when the blocking block 330 leaves the second groove 520, the upward movement of the grabbing structure 300 can directly separate the grabbing structure 300 from the counterweight block 500.

[0068] In this embodiment, to ensure a more secure and stable connection between the grasping structure 300 and the counterweight 500, two rotating rods 320 are provided. The two rotating rods 320 are spaced apart along the length of the connecting base 310. Accordingly, two first slots 510 and two second slots 520 are provided on the counterweight 500. The two first slots 510 correspond one-to-one with the two rotating rods 320, and the two second slots 520 correspond one-to-one with the two clamping blocks 330. With two rotating rods 320, when the two rotating rods 320 are inserted into the two first slots 510 and then rotated, the counterweight 500 is prevented from rotating with the rotating rods 320 due to the high friction between the clamping blocks 330 and the second slots 520, thereby ensuring a secure connection between the grasping structure 300 and the counterweight 500.

[0069] When two rotating rods 320 are provided, the first driving motor can drive the two rotating rods 320 simultaneously through a gear 431 group or a belt or other structure.

[0070] When two rotating rods 320 are provided, a first limit block 340 and a second limit block 350 may be further provided between the two rotating rods 320. In this case, the two clamping blocks 330 are located on the same straight line, and at least a portion of each clamping block 330 is located between the two rotating rods 320. The first limit block 340 is rotatably connected to one of the clamping blocks 330. The rotation axis 430 of the first limit block 340 is perpendicular to the rotation axis 430 of the rotating rod 320, and the rotation axis 430 of the first limit block 340 is perpendicular to the connection line between the two clamping blocks 330. The second limit block 350 is rotatably connected to the other clamping block 330. The rotation axis 430 of the second limit block 350 is perpendicular to the rotation axis 430 of the rotating rod 320, and the rotation axis 430 of the second limit block 350 is perpendicular to the connection line between the two clamping blocks 330. The second limit block 350 is disposed opposite the first limit block 340 and engages with the first limit block 340. When the first limit block 340 and the second limit block 350 are engaged, both rotating rods 320 cannot rotate. When the first limit block 340 and the second limit block 350 are separated, both rotating rods 320 can rotate. The first limit block 340 and the second limit block 350 restrict the rotating rods 320 to prevent the locking block 330 from being unable to smoothly enter the first slot 510 due to idling of the rotating rods 320.

[0071] In this case, a third slot 530 may also be provided on the counterweight 500 for engaging with the first limiting block 340 and the second limiting block 350. Two third slots 530 are provided, and the two third slots 530 are provided in a one-to-one correspondence with the two second slots 520. One third slot 530 engages with the first limiting block 340, and the other third slot 530 engages with the second limiting block 350. Of course, it is also possible to enlarge only the second slot 520 to accommodate the engaging block 330, the first limiting block 340, and the second limiting block 350.

[0072] 10 , a groove 341 is provided at the bottom of the first limiting block 340 , and the width of the groove 341 is smaller than that of the first limiting block 340 . A protrusion 351 is provided on the second limiting block 350 for engaging with the groove 341 , and the protrusion 351 engages with the groove 341 .

[0073] When the gripping structure 300 approaches the counterweight 500, the first stopper 340 and the second stopper 350 first contact the middle position of the two grooves 341. At this time, under the abutment of this position, the first stopper 340 and the second stopper 350 are lifted upward, and the rotating rod 320 and the clamping block 330 can freely enter and exit the first groove 510. When the gripping structure 300 continues to descend, refer to Figure 8The first and second limiting blocks 340 and 350 rotate until their free ends abut against the sidewalls of the first slot 510. After the first limiting block 340 and the second limiting block 350 rotate to the bottom of the first slot 510, the first drive motor drives the rotating rod 320 to rotate. At this time, the clamping block 330 engages with the second slot 520, and the first limiting block 340 (the second limiting block 350) engages with the third slot 530, completing the engagement between the gripping structure 300 and the counterweight 500.

[0074] When the counterweight block 500 needs to be separated from the gripping structure 300, the first drive motor is first reversed to allow the clamping block 330 to leave the second slot 520, and at the same time, the first limit block 340 (the second limit block 350) is allowed to leave the third slot 530. At this time, the connecting base 310 can be lifted. As the connecting base 310 rises, when the first limit block 340 and the second limit block 350 move to the notch close to the first slot 510, the free ends of the first limit block 340 and the second limit block 350 rotate downward under the action of their own gravity. When the first limit block 340 and the second limit block 350 completely leave the range of the first slot 510, the first limit block 340 and the second limit block 350 just form a clamping connection.

[0075] Since the groove 341 is provided at the bottom of the first limiting block 340 and the protrusion 351 is provided at the bottom of the second limiting block 350, the protrusion 351 must enter the groove 341 from below the groove 341 when engaging with the groove 341 to form a snap connection. Therefore, in this embodiment, when the first limiting block 340 and the second limiting block 350 leave the first groove 510, it is necessary to ensure that the free end of the second limiting block 350 is located below the free end of the first limiting block 340 to ensure a good snap connection between the first limiting block 340 and the second limiting block 350. Based on this, in this embodiment, a slope 540 is provided on the counterweight 500. The slope 540 is located between the two first grooves 510, and the two ends of the slope 540 extend to communicate with the two first grooves 510, and one end of the slope 540 facing the second limiting block 350 is lower than the other end. This ensures that when the grabbing structure 300 leaves the counterweight 500 , the free end of the second limiting block 350 rotates downward first, thereby ensuring that the protrusion 351 can enter the groove 341 from below the groove 341 .

[0076] See Figure 11 In this embodiment, the upper end surfaces of the first limit block 340 and the second limit block 350 are set to be flat, and the lower end surfaces of the first limit block 340 and the second limit block 350 are set to be arc surfaces, so as to ensure that the first limit block 340 and the second limit block 350 do not affect each other when rotating upward, and restrict each other when rotating downward, thereby ensuring that the first limit block 340 and the second limit block 350 can still remain locked in the horizontal position after losing external support.

[0077] When the gripping structure 300 leaves the counterweight 500, the second limit block 350 will first rotate downward. At this time, the second limit block 350 and the first limit block 340 will rotate inconsistently, which may easily cause the second limit block 350 to rotate excessively and become unable to engage with the first limit block 340. At this time, the second limit block 350 and the first limit block 340 will both rotate to a vertical position. To prevent this from happening, this embodiment further provides a blocking piece 360 at the bottom of the clamping block 330. The blocking piece 360 is disposed at the end of the clamping block 330 that is away from the rotating rod 320, and the blocking piece 360 extends from the bottom of the clamping block 330 to the bottom of the first limit block 340 or the bottom of the second limit block 350. The stopper 360 can be used to limit the downward rotation angle of the first limit block 340 and the second limit block 350, so that the second limit block 350 stops rotating immediately when it rotates to the horizontal state, thereby ensuring that the protrusion 351 and the groove 341 can be smoothly matched. Since the second limit block 350 is always located below the first limit block 340 when the grasping structure 300 leaves the counterweight 500, the downward rotation of the first limit block 340 is directly restricted by the second limit block 350. Therefore, it is possible to install the stopper 360 below the clamping block 330 connected to the first limit block 340, or not to install the stopper 360.

[0078] In the existing horizontal moving structure, one end of the connecting rope 200 is fixed and the other end is a free end. At this time, when driving the free end to move, it is only necessary to wind the connecting rope 200 around a rotating shaft to ensure that the height of the free end of the connecting rope 200 does not change when it moves in the horizontal direction. However, both ends of the connecting rope 200 in this embodiment are free ends. If the connecting rope 200 is simply wound around a rotating shaft, during the movement, while ensuring that the height of one end of the connecting rope 200 does not change, the height of the other end will inevitably change. The energy recovery device disclosed in this embodiment mainly obtains energy by driving the cargo up and down through the grasping structure 300. If its height is changed simply by changing its horizontal position, it is a waste of energy for the energy recovery device of this embodiment. Therefore, the present application discloses a sliding structure 400 that can make the free end of the connecting rope 200 move horizontally without changing the height of either end due to horizontal movement.

[0079] Specifically, see Figure 2 and Figure 3 A first rack 120 is provided at the bottom of the bracket 100 , and the sliding structure 400 includes a sliding seat 410 , a second driving motor, a rotating shaft 430 , a second rack 440 , a first pulley 450 and a second pulley 460 .

[0080] The sliding base 410 is slidably connected to the bracket 100, and the rotating shaft 430 is rotatably connected to the sliding base 410. A second drive motor is mounted on the sliding base 410 and is used to rotate the rotating shaft 430. The rotating shaft 430 is provided with a gear 431 for cooperating with the first rack 120. The gear 431 meshes with the first rack 120. When the rotating shaft 430 rotates, it can drive the sliding base 410 to move relative to the bracket 100.

[0081] The second rack 440 is slidably connected to the sliding base 410. Another gear 431 is provided on the rotating shaft 430 for meshing with the second rack 440. A bearing 432 is provided between the two gears 431 to support and fix the rotating shaft 430. The bearing 432 is mounted on the side wall of the sliding base 410, so that one gear 431 is located outside the sliding base 410 and meshes with the first rack 120, while the other gear 431 is located inside the sliding base 410 and meshes with the second rack 440. Based on this, when the rotating shaft 430 rotates, the sliding base 410 can move horizontally relative to the bracket 100, and the second rack 440 can slide vertically relative to the sliding base 410.

[0082] The first pulley 450 is connected to the sliding base 410 and can move synchronously with the sliding base 410. The second pulley 460 is connected to the second rack 440 and can move up and down with the second rack 440.

[0083] See Figure 14 and Figure 15In this embodiment, it is only necessary to ensure that the sum of the lengths of the first section 210, the second section 220, the third section 230, and the fourth section 240 of the connecting rope 200 is equal to the sum of the lengths of the fifth section 250, the sixth section 260, the seventh section 270, the eighth section 280, and the ninth section 290 of the connecting rope 200 to ensure that the height of the grabbing structure 300 does not change after the sliding seat 410 moves. Specifically, when the sliding structure 400 is in the first position, the first section 210 is the length of the connecting rope 200 wound around the first pulley 450, the second section 220 is the length of the connecting rope 200 between the first pulley 450 and the second pulley 460, the third section 230 is the length of the connecting rope 200 wound around the second pulley 460, and the fourth section 240 is the distance between the second pulley 460 and the grabbing structure 300. When the sliding structure 400 moves to the second position, the fifth section 250 is the distance moved by the sliding structure 400, the sixth section 260 is the length of the connecting rope 200 wrapped around the first pulley 450, the seventh section 270 is the length of the connecting rope 200 between the first pulley 450 and the second pulley 460, the eighth section 280 is the length of the connecting rope 200 wrapped around the second pulley 460, and the ninth section 290 is the distance between the connecting rope 200 and the second pulley 460 and the grasping structure 300.

[0084] See Figure 16 and Figure 17 In this embodiment, the two gears 431 on the rotating shaft 430 are identical gears 431, which ensures that the distance the sliding seat 410 moves horizontally is equal to the distance the second rack 440 moves vertically. Of course, in this embodiment, when the sliding seat 410 moves outward, the second rack 440 should move downward, and when the sliding seat 410 moves inward, the second rack 440 should move upward. Therefore, refer to Figure 2 In this embodiment, the above requirements can be met by disposing the first rack 120 at the bottom of the bracket 100 and engaging the first rack 120 with the bottom of the gear 431, and disposing the second rack 440 outside the gear 431. Of course, disposing the first rack 120 above the gear 431 is also possible, in which case the second rack 440 only needs to be disposed inside the gear 431.

[0085] In this embodiment, the gear 431 and the inside and outside of the sliding seat 410 need to be described. Figure 3 The left side of the sliding seat 410 is the inner side of the sliding seat 410 and the inner side of the gear 431 , and the right side of the sliding seat 410 is the outer side of the sliding seat 410 and the outer side of the gear 431 .

[0086] See Figure 2 and Figure 16The sliding seat 410 is provided with a roller 420, and the bracket 100 is provided with a track 110. The roller 420 and the track 110 are slidably engaged. On the one hand, the cooperation between the roller 420 and the track 110 can be used to support the sliding seat 410, and on the other hand, the cooperation between the roller 420 and the track 110 can also be used to limit the sliding seat 410.

[0087] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An energy recovery device, characterized in that: include: Bracket; An energy storage structure and a crane, wherein the energy storage structure and the crane are both installed on the support; A connecting rope, the connecting rope being wound around the output shaft of the crane, capable of driving the connecting rope to move from one end toward the other end when the crane is in operation, and capable of driving the working shaft of the energy storage structure to rotate when the connecting rope moves from one end toward the other end; Two grabbing structures, the two grabbing structures are respectively connected to two ends of the connecting rope; Two sliding structures, both of which are slidably connected to the bracket, and the two sliding structures are respectively located on both sides of the energy storage structure, the connecting rope is wound around the sliding structures, and the height of the grasping structure does not change when the sliding structures drive the grasping structure to move; and A counterweight block is used to cooperate with the energy storage structure, and the counterweight block is detachably connected to the grasping structure. When the counterweight block performs a deceleration movement, it can charge the energy storage structure.

2. The energy recovery device according to claim 1, characterized in that: The grabbing structure includes a connecting seat, a rotating rod, a first driving motor and a clamping block, wherein the connecting seat is connected to the connecting rope, the rotating rod is rotatably connected to the connecting seat, and the rotating rod can rotate relative to the connecting seat along the height direction of the bracket, the first driving motor is installed on the connecting seat, the first driving motor is transmission-connected to the rotating rod, and the clamping block is provided at one end of the rotating rod away from the connecting seat, and the clamping block protrudes from the surface of the connecting rod along the radial direction of the rotating rod; The counterweight block is provided with a first groove and a second groove, the first groove is arranged along the height direction of the counterweight block, the rotating rod and the clamping block are both slidably engaged with the first groove, the second groove is connected to the bottom of the first groove, and the second groove is arranged around the circumference of the first groove, and the clamping block is clamped and engaged with the second groove.

3. The energy recovery device according to claim 2, characterized in that: The two rotating rods are provided, and the two rotating rods are spaced apart along the length direction of the connecting seat. The grabbing structure further includes a first limiting block and a second limiting block, the first limiting block is rotatably connected to one of the clamping blocks, the second limiting block is rotatably connected to the other clamping block, the second limiting block is arranged opposite to the first limiting block, and the second limiting block is engaged with the first limiting block; There are two first slots, and the two first slots are arranged in one-to-one correspondence with the two rotating rods. There are two second slots, and the two second slots are arranged in one-to-one correspondence with the two clamping blocks. The counterweight block is also provided with a third slot for cooperating with the first limit block and the second limit block. There are two third slots, and the two third slots are arranged in one-to-one correspondence with the two second slots. One of the third slots is engaged with the first limit block, and the other third slot is engaged with the second limit block.

4. The energy recovery device according to claim 3, characterized in that: A groove is provided at the bottom of the first limiting block, the width of the groove is smaller than the width of the first limiting block, and a protrusion for cooperating with the groove is provided on the second limiting block, and the protrusion is engaged with the groove.

5. The energy recovery device according to claim 4, characterized in that: The counterweight block is provided with an inclined surface, which is located between the two first grooves, and both ends of the inclined surface extend to communicate with the two first grooves respectively, and one end of the inclined surface facing the second limiting block is lower than the other end thereof.

6. The energy recovery device according to claim 4, characterized in that: A blocking piece is provided on the card block, the blocking piece is provided at one end of the card block away from the rotating rod, and the blocking piece is located at the bottom of the card block, and the blocking piece extends from the bottom of the card block to the bottom of the first limit block or the second limit block.

7. The energy recovery device according to any one of claims 1 to 6, characterized in that: The sliding structure comprises: a sliding seat, the sliding seat being slidably connected to the bracket; A rotating shaft, wherein a gear is provided on the rotating shaft, and a first rack is provided on the bracket for cooperating with the gear, and the gear is meshed with the first rack; a second rack, the second rack being slidably connected to the sliding seat, and the second rack being movable relative to the sliding seat along a height direction of the bracket; and A first pulley and a second pulley, wherein the first pulley is connected to the sliding seat, the second pulley is connected to the second rack, and the connecting rope is sequentially wound around the first pulley and the second pulley.

8. The energy recovery device according to any one of claims 1 to 6, characterized in that: The energy storage structure includes a torsion spring, one end of which is connected to the bracket, and the other end of which is connected to the connecting rope. When one of the grasping structures moves in a direction away from the sliding structure, the torsion spring is tightened.

9. The energy recovery device according to any one of claims 1 to 6, characterized in that: The energy storage structure includes a box, a screw, a nut and a spring. The box is installed on the bracket, the nut is slidably connected to the box, the screw is rotatably connected to the box, and the screw is threadedly connected to the nut. The two ends of the spring are respectively connected to the box and the nut. The connecting rope is wrapped around the screw. When one of the grabbing structures moves in a direction away from the sliding structure, the screw rotates and causes the nut to compress the spring.

10. The energy recovery device according to any one of claims 1 to 6, characterized in that: The energy storage structure includes a connecting tube, a medium and two pistons. The pistons are slidably connected to the connecting tube. The two pistons are respectively located below the two grasping structures. The medium is located in the connecting tube and fills between the two pistons. When one piston moves downward, the medium pushes the other piston to move upward.

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