A hook mechanism and hoisting device for hoisting a wave-absorbing material

Abstract

The application discloses a kind of wave-absorbing material hoist's lifting hook mechanism and hoisting device, including the guide rail being set in darkroom top, traction trolley is movably arranged on guide rail, further include: support, it is fixedly set in darkroom top, and it is set in the extension direction of one end corresponding guide rail;Roller assembly is movably set on support, traction rope is wound on it, one end of traction rope is connected in traction trolley, other end is connected with counterweight, counterweight is connected with lifting hook mechanism below;Height support subassembly is connected with roller assembly.The application sets up the roller assembly of lift, and under the action of height support subassembly, when traction rope is pulled up lifting hook mechanism to darkroom top, height support subassembly can drive roller assembly further drive lifting hook mechanism to rise to leave darkroom along support, thereby avoid that lifting hook mechanism remains in darkroom, reduce the influence to subsequent darkroom detection.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, specifically to a hook mechanism and hoisting device for hoisting microwave absorbing materials. Background Technology

[0002] When inspecting vehicles in an anechoic chamber, the radar-absorbing material on the floor between the chamber door and the turntable needs to be removed to allow the vehicle to enter. Traditionally, this involves manually removing a portion of the obstructing wedges to allow the vehicle to pass. Once the vehicle reaches the turntable, the wedges are manually moved back to their original positions. This process is repeated after the inspection and before the vehicle can exit. Clearly, this method is time-consuming, labor-intensive, and inefficient, failing to meet the requirement for rapid vehicle passage.

[0003] To address this issue and improve inspection efficiency, this application proposes an automatically controlled hoisting device. However, due to the unique nature of anechoic chamber inspection, in addition to the necessary inspection structures, other tangible structures, especially metal structures, should be removed from the anechoic chamber. The hook mechanism included in the hoisting device is usually suspended from the top of the anechoic chamber, and even when raised to the highest position, it cannot avoid affecting the anechoic chamber inspection. Therefore, there is an urgent need for a hook mechanism and hoisting device for hoisting microwave absorbing materials to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a hook mechanism and lifting device for hoisting microwave absorbing materials, so as to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A hoisting device for absorbing microwave materials includes a guide rail mounted on the top of a darkroom, a traction trolley movably mounted on the guide rail, and two sets of guide rails and traction trolleys symmetrically arranged. It also includes: a bracket fixedly mounted on the top of the darkroom and positioned in the direction corresponding to one end of the guide rail; a roller assembly movably mounted on the bracket, with a traction rope wound around it, one end of which is connected to the traction trolley, and the other end connected to a counterweight, with a hook mechanism connected below the counterweight; and a lifting assembly connected to the roller assembly. After the traction rope pulls the hook mechanism to the top of the darkroom, the lifting assembly drives the roller assembly to further lift the hook mechanism away from the darkroom.

[0007] Preferably, multiple sets of brackets and roller assemblies corresponding to the same traction trolley are evenly arranged along the extension direction of the guide rail.

[0008] Preferably, the roller assembly includes a shaft that is movably mounted on a bracket, a pulley that is coaxially rotatably mounted on the shaft, and a traction rope that is wound around the pulley.

[0009] Preferably, a slider is provided at one end of the shaft, and a lifting groove matching the slider is provided on the bracket. A limiting component for limiting the movement of the slider is provided on the inner wall of the lifting groove. The limiting component is released after the traction rope pulls the hook mechanism to the top of the darkroom.

[0010] Preferably, the limiting component includes a trigger element that is elastically and movable inside the bracket. One end of the trigger element extends through one side of the bracket, and the other end is connected to the limiting component through a connector. The limiting component is movably installed through the inner wall of the lifting groove. A kit is movably fitted on the bracket. A baffle is provided on one side of the kit. A traction rope is movably installed through a round hole provided on the baffle. The kit and the end of the trigger element extending out of the bracket are wedge-shaped and fitted together.

[0011] Preferably, the baffle is provided with a magnetic block for attracting the counterweight, and the magnetic attraction force of the magnetic block on the counterweight is less than the weight of the counterweight.

[0012] Preferably, the support assembly includes a sleeve hinged to the top of the darkroom, and a telescopic rod is elastically and telescopically installed inside the sleeve. The free end of the telescopic rod is hinged to the end of the shaft away from the pulley.

[0013] Preferably, the top of the darkroom is provided with an opening for the counterweight and the hook mechanism to pass through, and a baffle is rotatably provided below the opening. The baffle is linked to the lifting and lowering of the kit through a linkage component.

[0014] Preferably, the linkage component includes a support fixedly installed on the top of the darkroom, a linkage gear with damping rotatable at the upper end of the support, the linkage gear being connected to the rotating shaft of the baffle through bevel gear transmission, and a linkage rack matching the linkage gear being fixedly installed on the kit.

[0015] A lifting hook mechanism for absorbing material hoisting, based on the above-mentioned hoisting device for absorbing material hoisting, includes a hook-shaped part and an opening and closing part. The lower end of the hook-shaped part is bent and the upper end is hinged to the opening and closing part. The upper end of the opening and closing part is connected to a counterweight, and the lower end is engaged with the bent end of the hook-shaped part.

[0016] In the above technical solution, the beneficial effects of the present invention are:

[0017] The hoisting device for absorbing materials is equipped with a liftable roller assembly. With the help of the support assembly, when the traction rope pulls the hook mechanism to the top of the darkroom, the support assembly can drive the roller assembly to further lift the hook mechanism along the support to leave the darkroom. This avoids the hook mechanism remaining in the darkroom and reduces the impact on subsequent darkroom testing.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0019] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the winch structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the darkroom in this invention;

[0024] Figure 4 This is a schematic diagram of a partial structure of the top of the darkroom of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0026] Figure 6 This is a schematic diagram of the component structure of the top of the darkroom of the present invention;

[0027] Figure 7 This is a partial structural schematic diagram of the side cross-section of the traction rope of the present invention;

[0028] Figure 8 This is a partial structural schematic diagram of the side cross-section of the bracket of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Darkroom; 2. Guide rail; 3. Traction trolley; 4. Bracket; 5. Traction rope; 6. Counterweight; 7. Shaft; 8. Pulley; 9. Slider; 10. Lifting groove; 11. Trigger; 12. Connector; 13. Limiting component; 14. Kit; 15. Baffle; 16. Magnetic block; 17. Sleeve; 18. Telescopic rod; 19. Through port; 20. Baffle; 21. Support; 22. Linkage gear; 23. Linkage rack; 24. Hook-shaped part; 25. Opening and closing part. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Please see Figure 1-8 The present invention provides a hoisting device for absorbing materials, comprising a guide rail 2 disposed on the top of an anechoic chamber 1, a traction trolley 3 movably disposed on the guide rail 2, and two sets of guide rail 2 and traction trolley 3 symmetrically arranged; further comprising: a bracket 4, which is fixedly disposed on the top of the anechoic chamber 1 and disposed in the direction of extension corresponding to one end of the guide rail 2; a roller assembly, which is movably disposed on the bracket 4 and has a traction rope 5 wound around it, one end of the traction rope 5 being connected to the traction trolley 3 and the other end being connected to a counterweight 6, with a hook mechanism connected below the counterweight 6; and a lifting assembly, which is connected to the roller assembly. After the traction rope 5 pulls the hook mechanism to the top of the anechoic chamber 1, the lifting assembly drives the roller assembly to further lift the hook mechanism away from the anechoic chamber 1.

[0033] Specifically, the anechoic chamber 1 is a closed testing laboratory with six sides covered by sound-absorbing wedges, one side of which has a door for vehicle passage; the guide rail 2 is fixedly installed on the top of the anechoic chamber 1, and its extension direction points towards the door of the anechoic chamber 1; the bracket 4 is installed at the end of the guide rail 2 near the door of the anechoic chamber 1; a winch installed on the ground is installed on the opposite side of the door of the anechoic chamber 1. The winch unwinds a steel wire rope, which passes over a fixed pulley installed at the corner of the top of the anechoic chamber 1 and connects to the traction trolley 3. Placing the winch on the ground facilitates its installation and maintenance, and also facilitates the detection of abnormal conditions of the winch. Due to the arrangement of the beams on the top of the anechoic chamber 1, the guide rail 2 is set into two sets symmetrically on the left and right; the traction rope 5 is preferably a nylon suspension rope; multiple sets of brackets 4 and roller assemblies corresponding to the same traction trolley 3 are evenly arranged along the extension direction of the guide rail 2, and the multiple sets of brackets 4 and roller assemblies are arranged at equal intervals and are staggered in the horizontal and vertical directions relative to the extension direction of the guide rail 2. With the counterweight 6 in place, the hook mechanism descends in two ways: with load and without load. With load, the hook connects to the wedge-shaped lifting base; during descent, the winch releases the rope while the weight of the lifting base and counterweight 6 simultaneously moves the traction trolley 3. Without load, the hook is unloaded; during descent, the winch releases the rope while only the weight of counterweight 6 moves the traction trolley 3. Preferably, the same traction trolley 3 is connected to three traction ropes 5, corresponding to three sets of roller assemblies. With two symmetrical guide rails 2, six hook mechanisms are connected to the wedge-shaped base, and the base has multiple lifting rings distributed in the same way as the hook mechanisms. The lifting assembly controls the raising and lowering of the roller assemblies, which in turn raise the hook mechanism further. In practical use, when the traction rope 5 pulls the hook mechanism to the top of the darkroom 1, the support assembly can drive the roller assembly to further lift the hook mechanism along the bracket 4 to leave the darkroom 1, thereby avoiding the hook mechanism remaining in the darkroom 1 and reducing the impact on subsequent darkroom testing.

[0034] Compared with the prior art, the lifting device for absorbing material proposed in this embodiment of the invention is equipped with a liftable roller assembly. Under the action of the support assembly, when the traction rope 5 pulls the hook mechanism to the top of the darkroom 1, the support assembly can drive the roller assembly to further lift the hook mechanism along the bracket 4 to leave the darkroom 1. This avoids the hook mechanism remaining in the darkroom 1 and reduces the impact on subsequent darkroom testing.

[0035] As a preferred technical solution of this embodiment, the roller assembly includes a shaft 7 that is movably mounted on the bracket 4, a pulley 8 that is coaxially rotatably mounted on the shaft 7, and a traction rope 5 that is wound around the pulley 8. Specifically, the axis of the shaft 7 is horizontal and perpendicular to the extension direction of the traction rope 5; the pulley 8 rolls on the shaft 7 to help the traction rope 5 move smoothly along the extension direction.

[0036] As a preferred technical solution in this embodiment, a slider 9 is provided at one end of the shaft 7, and a lifting groove 10 matching the slider 9 is provided on the bracket 4. A limiting component for limiting the movement of the slider 9 is provided on the inner wall of the lifting groove 10. The limiting component is released after the traction rope 5 pulls the hook mechanism to the top of the darkroom 1. Specifically, the slider 9 is preferably a rectangular block that only moves up and down in the lifting groove 10. When the slider 9 is at the highest position in the lifting groove 10, the hook mechanism that has risen to the top of the darkroom 1 is pulled up to be removed from the darkroom 1 via the shaft 7 and the pulley 8. The limiting component limits the slider 9 to the lowest position in the lifting groove 10. The limiting component is released after the traction rope 5 pulls the hook mechanism to the top of the darkroom 1, and then the lifting component drives the shaft 7 and the pulley 8 to rise.

[0037] As a further preferred technical solution of this embodiment, the limiting component includes a trigger 11 elastically movable within the bracket 4. One end of the trigger 11 extends through one side of the bracket 4, and the other end is connected to a limiting component 13 via a connector 12. The limiting component 13 is movably disposed through the inner wall of the lifting groove 10. A kit 14 is movably fitted onto the bracket 4. A baffle 15 is provided on one side of the kit 14, and a traction rope 5 is movably disposed through a circular hole provided on the baffle 15. The kit 14 and the end of the trigger 11 extending out of the bracket 4 are wedge-shapedly engaged. Specifically, a movable groove for the trigger 11 to move is opened inside the solid body of the bracket 4. The trigger 11 moves horizontally, with one end located in the movable groove and a spring abutting against the inner wall of the movable groove. The trigger 11, the connector 12, and the limiting component 13 form a C-shaped structure. In this configuration, the trigger 11, under the elastic force of the spring, tends to extend one end out of the side of the bracket 4, while simultaneously keeping the limiting member 13 tending to extend into the lifting groove 10. The end of the trigger 11 extending out of the side of the bracket 4 is triangular, allowing it to wedge and compress with the lifting assembly 14. The upper side of the limiting member 13 is set as an inclined surface, forming a wedge fit with the slider 9. That is, when the slider 9 descends from above the limiting member 13, it can compress through the limiting member 13, and when it rises from below the limiting member 13, it is limited by the extended limiting member 13. The assembly 14 is looped around the outside of the bracket 4 and moves up and down along the bracket 4. The baffle 15 is horizontally fixed on the side of the assembly 14 near the traction rope 5. The baffle 15 has a round hole for the traction rope 5 to pass through, while the baffle 15 itself blocks the counterweight 6. In practical use, when the traction trolley 3 is driven by the traction rope 5 to lift the hook mechanism to the top of the darkroom 1, the counterweight 6 pushes the baffle 15 upward to a certain height. The baffle 15 then drives the kit 14 to rise along the bracket 4 so that the kit 14 and the protruding end of the trigger 11 are wedge-shaped and squeezed together, causing the trigger 11 to retract into the bracket 4. Then, through the connecting piece 12, the limiting piece 13 retracts away from the lifting groove 10, thereby canceling the limitation on the slider 9. Then the lifting assembly can drive the shaft 7 and the pulley 8 to rise.

[0038] As a further preferred technical solution of this embodiment, the support assembly includes a sleeve 17 hinged to the top of the darkroom 1. A telescopic rod 18 is elastically telescopically arranged inside the sleeve 17. The free end of the telescopic rod 18 is hinged to the end of the shaft 7 away from the pulley 8. Specifically, the end of the shaft 7 away from the pulley 8 is provided with two spaced protruding rings. The free end of the telescopic rod 18 is fixedly provided with a hoop that limits the movement between the two protruding rings. The hinge between the telescopic rod 18 and the shaft 7 satisfies the requirement that the telescopic rod 18 drives the shaft 7 to rise and fall without causing other motion interference. When the shaft 7 and the pulley 8 are in the lowest position formed by the rise and fall, the telescopic rod 18 is contracted to its shortest length and stores the elastic potential energy that allows it to extend. In practical use, when the slider 9 rises without restriction, the elastic potential energy of the telescopic rod 18 can be released to extend, thereby pushing the shaft tube 1 and pulley 8 to rise. The pulley 8, through the traction rope 5, drives the hook mechanism to rise and move out of the darkroom 1. When the hook mechanism needs to be used, the traction trolley 3 moves towards the door of the darkroom 1. Under the guidance of the counterweight 6, the traction rope 5 lowers the hook mechanism. At this time, the telescopic rod 18 still maintains elastic extension. After the hook mechanism descends to the designated height and connects with the base of the sound-absorbing wedge, the traction trolley 3 moves away from the door of the darkroom 1. Since the hook mechanism is suspending a heavy object at this time, the traction trolley 3 will move away from the door at the beginning of its movement. The traction rope 5 is stressed at both ends, which compresses the pulley 8 to descend. The telescopic rod 18 then elastically contracts until the pulley 8 and the shaft 7 reach their lowest positions. At this point, the shaft 7 is again restricted by the limiting component, and the telescopic rod 18 remains contracted. Only then does the traction rope 5 begin to drive the hook mechanism to rise. It can be seen that when the hook mechanism begins to lift, it first triggers the elastic contraction of the telescopic rod 18 to buffer the sudden tension generated when the traction rope 5 begins to lift. This allows the sound-absorbing wedge and its base to be lifted to gradually bear the force. Only after the telescopic rod 18 has completed its contraction does the traction rope 5 become taut. This ensures that the base of the sound-absorbing wedge is evenly stressed before it is lifted off the ground, thus effectively protecting the sound-absorbing wedge and preventing its deformation.

[0039] In addition, during the process of the shaft 7 and pulley 8 being driven to rise by the support assembly, there is a distance between the baffle 15 and the pulley 8, which satisfies the displacement caused by the change in the tilt angle of the traction rope 5 due to the lifting and lowering of the pulley 8.

[0040] As a preferred technical solution in this embodiment, the baffle 15 is provided with a magnetic block 16 for adsorbing with the counterweight 6, and the magnetic attraction force of the magnetic block 16 on the counterweight 6 is less than the weight of the counterweight 6. Specifically, the counterweight 6 is preferably cylindrical and made of magnetically attractive metal. In actual use, after the kit 14 rises past the trigger 11, the trigger 11 automatically rebounds to block the underside of the kit 14. With the setting of the magnetic block 16, when the counterweight 6 rises and pushes the baffle 15, the baffle 15 is magnetically fixed to the counterweight 6. When the counterweight 6 pushes the baffle 15 to drive the kit 14 past the trigger 11, and then the counterweight 6 descends, the baffle 15 descends with the counterweight 6 under magnetic fixation, and can then squeeze through the trigger 11 again until the kit 14 descends to the lowest height. The counterweight 6 continues to descend, so that the gravity resists the attraction force of the magnetic block 16, allowing the baffle 15 to separate smoothly from the counterweight 6.

[0041] In another embodiment of the present invention, the top of the darkroom 1 is provided with an opening 19 for the counterweight 6 and the hook mechanism to pass through. A baffle 20 is rotatably provided below the opening 19. The baffle 20 is linked to the lifting and lowering of the kit 14 through a linkage component. Specifically, by setting the linkage component, during the process of the kit 14 rising, the baffle 20 is linked to rotate upward to close the opening 19, thereby ensuring the sealing of the darkroom. During the process of the kit 14 falling, the baffle 20 is linked to rotate downward to open the opening 19, so as to facilitate the passage of the counterweight 6 and the hook mechanism.

[0042] As a preferred technical solution in this embodiment, the linkage component includes a support 21 fixedly mounted on the top of the darkroom 1. A damped linkage gear 22 is rotatably mounted on the upper end of the support 21. The linkage gear 22 is connected to the rotating shaft of the baffle 20 via a bevel gear transmission. A linkage rack 23 matching the linkage gear 22 is fixedly mounted on the assembly 14. Specifically, the support 21 is located on the opposite side of the trigger element 11 penetrating the support 4. The rotating shaft of the linkage gear 22 is rotatably connected to the upper end of the support 21 with damping. A vertically oriented transmission shaft is rotatably mounted on the support 21. The upper and lower ends of the transmission shaft are respectively connected to the rotating shaft of the linkage gear 22 and the rotating shaft of the baffle 20 via a set of bevel gears. The linkage rack 23 only undergoes transmission when passing through the linkage gear 22. Throughout the entire transmission process, the angle at which the linkage gear 22 rotates is transmitted to the baffle 20 so as to control the opening and closing of the baffle 20 through the port 19, and the rotation angle range of the baffle 20 is greater than 90°. Furthermore, the transmission time between the linkage rack 23 and the linkage gear 22 does not coincide with the time of the lowest and highest parts of the lifting stroke of the assembly 14. Thus, during the lifting process of the assembly 14, the assembly 14 is first pushed up by the counterweight 6 to a certain height to satisfy the lifting of the hook mechanism through the through port 19 to a certain height. Then, in the middle section of the lifting of the assembly 14, the linkage gear 22 and the linkage rack 23 are fully transmitted. Finally, in the highest section of the lifting process of the assembly 14, the displacement caused by the angle change of the traction rope 5 is avoided.

[0043] A lifting hook mechanism for hoisting microwave absorbing materials, based on the aforementioned hoisting device for hoisting microwave absorbing materials, includes a hook-shaped portion 24 and an opening / closing portion 25. The lower end of the hook-shaped portion 24 is bent, while the upper end is hinged to the opening / closing portion 25. The upper end of the opening / closing portion 25 is connected to a counterweight 6, while the lower end is engaged with the bent end of the hook-shaped portion 24. Specifically, during hoisting, the hook-shaped portion 24 is subjected to downward force, while the opening / closing portion 25 is subjected to upward force, thereby causing the bent end of the hook-shaped portion 24 to abut and close with the lower end of the opening / closing portion 25. When the hoisting is completed, the hook-shaped portion 24 and the opening / closing portion 25 are relaxed, allowing for easy relative rotation to open the abutting end.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hoisting device for absorbing microwave materials, comprising a guide rail (2) mounted on the top of a darkroom (1), a traction trolley (3) movably mounted on the guide rail (2), and two sets of guide rails (2) and traction trolleys (3) symmetrically arranged, characterized in that, Also includes: The bracket (4) is fixedly installed on the top of the darkroom (1) and is positioned in the direction of one end of the guide rail (2); The roller assembly is mounted on the support (4) for lifting and lowering. A traction rope (5) is wound around the roller assembly. One end of the traction rope (5) is connected to the traction trolley (3), and the other end is connected to the counterweight (6). A hook mechanism is connected below the counterweight (6). The lifting assembly, which is connected to the roller assembly, drives the roller assembly to further lift the hook mechanism away from the dark chamber (1) after the traction rope (5) pulls the hook mechanism to the top of the dark chamber (1).

2. The hoisting device for absorbing materials according to claim 1, characterized in that, Multiple sets of brackets (4) and roller assemblies corresponding to the same traction trolley (3) are evenly arranged along the extension direction of the guide rail (2).

3. The hoisting device for absorbing materials according to claim 1, characterized in that, The roller assembly includes a shaft (7) that is movably mounted on a bracket (4), a pulley (8) that is coaxially mounted on the shaft (7), and a traction rope (5) that is wound around the pulley (8).

4. The hoisting device for absorbing materials according to claim 3, characterized in that, One end of the shaft (7) is provided with a slider (9), and the bracket (4) is provided with a lifting groove (10) that matches the slider (9). The inner wall of the lifting groove (10) is provided with a limiting component for limiting the movement of the slider (9). The limiting component is released after the traction rope (5) pulls the hook mechanism to the top of the dark room (1).

5. The hoisting device for absorbing materials according to claim 4, characterized in that, The limiting component includes a trigger (11) that is elastically and movable inside the bracket (4). One end of the trigger (11) extends through one side of the bracket (4), and the other end is connected to a limiting component (13) through a connector (12). The limiting component (13) is movably installed through the inner wall of the lifting groove (10). A kit (14) is movably fitted on the bracket (4). A baffle (15) is provided on one side of the kit (14). The traction rope (5) moves through the round hole provided on the baffle (15). The kit (14) and the trigger (11) are wedge-shaped and fitted together at one end of the bracket (4).

6. The hoisting device for absorbing materials according to claim 5, characterized in that, The baffle (15) is provided with a magnetic block (16) for adsorbing the counterweight (6), and the magnetic attraction force of the magnetic block (16) on the counterweight (6) is less than the gravity setting of the counterweight (6).

7. The hoisting device for absorbing materials according to claim 3, characterized in that, The support assembly includes a sleeve (17) hinged to the top of the darkroom (1), and a telescopic rod (18) is elastically telescopically arranged inside the sleeve (17). The free end of the telescopic rod (18) is hinged to the end of the shaft (7) away from the pulley (8).

8. The hoisting device for absorbing materials according to claim 5, characterized in that, The top of the darkroom (1) is provided with an opening (19) for the counterweight (6) and the hook mechanism to pass through. A baffle (20) is rotatably provided below the opening (19). The baffle (20) is linked to the lifting and lowering linkage of the kit (14) through the linkage component.

9. The hoisting device for absorbing materials according to claim 8, characterized in that, The linkage assembly includes a support (21) fixedly installed on the top of the darkroom (1), a linkage gear (22) with damping is installed on the upper end of the support (21), the linkage gear (22) is connected to the rotating shaft of the baffle (20) through bevel gear transmission, and a linkage rack (23) matching the linkage gear (22) is fixedly installed on the kit (14).

10. A lifting hook mechanism for hoisting microwave absorbing materials, based on the lifting device for hoisting microwave absorbing materials according to any one of claims 1 to 9, characterized in that, It includes a hook-shaped part (24) and an opening and closing part (25). The lower end of the hook-shaped part (24) is bent and the upper end is hinged to the opening and closing part (25). The upper end of the opening and closing part (25) is connected to the counterweight (6) and the lower end is fitted with the bent end of the hook-shaped part (24).

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