Protective structure of hoistway elevator

Abstract

The invention discloses a protective structure of a hoistway elevator, and belongs to the technical field of hoistway elevators, the protective structure comprises a mounting shell, a protective mechanism is arranged in the mounting shell, and a protective cover plate used for blocking the open end of the mounting shell is arranged on the side, away from the mounting shell, of the protective mechanism; the mounting shell is fixedly connected with the protective cover plate; the protection mechanism comprises a protection assembly used for being matched with the mounting shell to limit and lock the elevator, and a first locking assembly used for being matched with the mounting shell to limit and fix the protection assembly. The second locking assembly is used for being matched with the mounting shell to play a one-way limiting and fixing role on the protection assembly so as to prevent the protection assembly from moving in the direction close to the first locking assembly; through mutual cooperation of multiple structures, when the elevator encounters accidental dangerous situations such as falling or top rushing and needs to be protected, limiting braking protection can be provided for the elevator instantly.

Description

Technical Field

[0001] This invention belongs to the field of hoist technology, specifically relating to a protective structure for a hoist. Background Technology

[0002] A shaft hoist is a vertical transportation device installed in a building shaft. It is mainly used for the vertical transportation of personnel and materials in construction. It eliminates the need for an external transportation platform, making the overall construction more efficient. Corresponding protective structures are used when using shaft hoists. Traditional protective structures include a housing, motor, two-way lead screw, sliding block, movable rod, sliding rod, baffle, limit plate, moving wheel, and spring. The advantage of this protective structure is that it can limit the movement by controlling the moving wheel to extend out of the housing and contact the inner wall of the wellbore. However, in the traditional protective structure, the process of extending the moving wheel out of the housing by driving a two-way lead screw with a motor takes a long time, which makes the protective structure unable to respond quickly to the user's protection needs, resulting in an unsatisfactory protective effect, which urgently needs to be improved. Summary of the Invention

[0003] The purpose of this invention is to provide a protective structure for a hoist, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a protective structure for a hoist, comprising a mounting housing, wherein a protective mechanism is provided inside the mounting housing, and a protective cover plate is provided on the side of the protective mechanism away from the mounting housing for sealing the opening end of the mounting housing. The mounting housing and the protective cover plate are fixedly connected. The protective mechanism includes a protective component for limiting and locking the hoist in conjunction with the mounting housing, a first locking component for limiting and fixing the protective component in conjunction with the mounting housing, and a second locking component for unidirectionally limiting and fixing the protective component in conjunction with the mounting housing to prevent the protective component from moving towards the first locking component. The protective component is disposed on both sides of the first locking component, and the second locking component is disposed on both sides of the first locking component. The second locking component is disposed on the side of the protective component facing the mounting housing.

[0005] As a further aspect of the present invention: the first locking assembly includes a first limiting mounting plate, which is fixedly connected to the mounting housing. A first adjustable locking plate is provided on the side of the first limiting mounting plate away from the mounting housing. A plurality of first elastic driving members are provided at both ends of the first limiting mounting plate for driving the first adjustable locking plate to move away from the mounting housing. A plurality of limiting through holes are provided on the upper surface of the first adjustable locking plate. A plurality of second driving plates are provided at both ends of the first adjustable locking plate. A plurality of first driving plates are provided at both ends of the first limiting mounting plate for cooperating with the second driving plates to drive the first adjustable locking plate to move closer to the first limiting mounting plate.

[0006] As a further embodiment of the present invention: the two ends of the first limiting mounting plate are provided with a plurality of elastic airbags for cooperating with the first driving plate to play a noise reduction role. The elastic airbags are fixedly connected to the first driving plate, one end of the first elastic driving member is fixedly connected to the first limiting mounting plate, and the other end of the first elastic driving member is fixedly connected to the first adjustable locking plate.

[0007] As a further embodiment of the present invention: a hollow air storage plate is provided on the side of the first limiting mounting plate facing the first adjustable locking plate, and a plurality of air supply pipes connected to the elastic airbag are provided at both ends of the hollow air storage plate, and a plurality of sound tubes for sound warning are provided at both ends of the hollow air storage plate.

[0008] As a further embodiment of the present invention: the protective component includes a movable protective plate, which is disposed through the side wall of the mounting housing and is slidably connected to the mounting housing. A third limiting mounting plate is fixedly connected to one end of the movable protective plate away from the mounting housing, and a second adjustable locking plate is fixedly connected to the other end of the movable protective plate for limiting and fixing the movable protective plate in conjunction with the limiting through hole. A plurality of third elastic driving members are provided on the side of the second adjustable locking plate facing the movable protective plate for cooperating with the mounting housing to drive the second adjustable locking plate to move away from the first adjustable locking plate.

[0009] As a further embodiment of the present invention: a fourth limiting mounting plate is provided on the side of the third limiting mounting plate away from the mounting housing, and limiting guide plates that are slidably connected to the third limiting mounting plate are fixedly connected to both ends of the fourth limiting mounting plate; one end of the third elastic driving member is fixedly connected to the second adjustable locking plate, and the other end of the third elastic driving member is fixedly connected to the mounting housing.

[0010] As a further embodiment of the present invention: the fourth limiting mounting plate is provided with a plurality of movable locking members on the side away from the third limiting mounting plate for limiting and fixing the fourth limiting mounting plate; the third limiting mounting plate is provided with a plurality of fourth elastic driving members at both ends for driving the fourth limiting mounting plate to move away from the third limiting mounting plate; one end of the fourth elastic driving member is fixedly connected to the third limiting mounting plate; and the other end of the fourth elastic driving member is fixedly connected to the fourth limiting mounting plate.

[0011] As a further embodiment of the present invention: the second locking component includes a second limiting mounting plate, and the lower surface of the second limiting mounting plate is provided with a plurality of second elastic driving members at both ends for cooperating with the mounting housing to drive the second limiting mounting plate to move toward the movable protective plate. One end of the second elastic driving member is fixedly connected to the second limiting mounting plate, and the other end of the second elastic driving member is fixedly connected to the mounting housing.

[0012] As a further embodiment of the present invention: the second limiting mounting plate is provided with a plurality of locking baffles at intervals on the side facing the movable protective plate, which are used to cooperate with the second adjustable locking plate to limit and lock the movable protective plate to prevent the movable protective plate from moving toward the first adjustable locking plate, and the locking baffles are fixedly connected to the second limiting mounting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure and is easy to use. When the elevator encounters an accidental danger such as falling or overshooting and needs protection, the present invention can provide limit braking protection for the elevator instantly, so that the protective structure can quickly respond to the user's protection needs and make the protective structure more effective. Secondly, the present invention can be applied to different models of elevators, making the application scope of the protective structure wider and worthy of promotion and use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the protective structure of a hoist. Figure 2 This is an exploded view of the protective structure of a hoistway. Figure 3 This is a schematic diagram of the protective mechanism in the protective structure of a hoist. Figure 4 This is a schematic diagram of the first locking component in the protective structure of a hoist. Figure 5 This is a schematic diagram of the second locking component in the protective structure of a hoist. Figure 6 This is a schematic diagram of the protective components in the protective structure of a hoist. In the diagram: 1-Mounting housing, 2-Protective cover, 3-Protective mechanism, 31-First locking assembly, 32-Second locking assembly, 33-Protective assembly, 310-First drive plate, 311-Elastic airbag, 312-Second drive plate, 313-First elastic drive component, 314-Limiting through hole, 315-First adjustable locking plate, 316-Air supply pipe, 317-Hollow air storage plate, 318-Sound pipe, 319-First limiting mounting plate, 320-Second elastic drive component, 321-Second limiting mounting plate, 322-Locking baffle, 330-Limiting guide plate, 331-Third elastic drive component, 332-Second adjustable locking plate, 333-Movable protective plate, 334-Third limiting mounting plate, 335-Fourth elastic drive component, 336-Movable locking component, 337-Fourth limiting mounting plate. Detailed Implementation

[0015] 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.

[0016] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection", "linking", and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting.

[0017] Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] Please see Figures 1-6This embodiment provides a protective structure for a hoist, including a mounting housing 1. A protective mechanism 3 is provided inside the mounting housing 1. A protective cover plate 2 is provided on the side of the protective mechanism 3 away from the mounting housing 1 to block the opening end of the mounting housing 1. The mounting housing 1 and the protective cover plate 2 are fixedly connected. The protective mechanism 3 includes a protective component 33 for limiting and locking the hoist in conjunction with the mounting housing 1, a first locking component 31 for limiting and fixing the protective component 33 in conjunction with the mounting housing 1, and a second locking component 32 for unidirectionally limiting and fixing the protective component 33 in conjunction with the mounting housing 1 to prevent the protective component 33 from moving towards the first locking component 31. The protective component 33 is located on both sides of the first locking component 31, and the second locking component 32 is located on both sides of the first locking component 31. The second locking component 32 is located on the side of the protective component 33 facing the mounting housing 1.

[0019] Please see Figure 2 , Figure 3 and Figure 4 In one embodiment, to make the use of the first locking component 31 more reliable, preferably, the first locking component 31 includes a first limiting mounting plate 319, which is fixedly connected to the mounting housing 1. A first adjustable locking plate 315 is provided on the side of the first limiting mounting plate 319 away from the mounting housing 1. A plurality of first elastic driving members 313 are provided at both ends of the first limiting mounting plate 319 for driving the first adjustable locking plate 315 to move away from the mounting housing 1. The first adjustable locking plate 315 is a spring. Several limiting through holes 314 are provided on the upper surface of the first adjustable locking plate 315. Several second driving plates 312 are provided at both ends of the first adjustable locking plate 315. The second driving plates 312 are iron plates or electromagnetic plates. Several first driving plates 310 are provided at both ends of the first limiting mounting plate 319 to cooperate with the second driving plates 312 to drive the first adjustable locking plate 315 to move closer to the first limiting mounting plate 319. The first driving plates 310 are electromagnetic plates corresponding to iron plates or neodymium iron boron magnetic plates corresponding to electromagnetic plates.

[0020] Please see Figure 4In one embodiment, to enrich the function of the first locking component 31, preferably, the first limiting mounting plate 319 has several elastic airbags 311 at both ends for cooperating with the first driving plate 310 to reduce noise. The elastic airbags 311 are hollow rubber airbags and are fixedly connected to the first driving plate 310. One end of the first elastic driving member 313 is fixedly connected to the first limiting mounting plate 319, and the other end of the first elastic driving member 313 is fixedly connected to the first adjustable locking plate 315. The first limiting mounting plate 319 has a hollow air storage plate 317 on the side facing the first adjustable locking plate 315. The hollow air storage plate 317 is a hollow rubber plate. Several air supply pipes 316 connected to the elastic airbags 311 are provided at both ends of the hollow air storage plate 317, and several sound pipes 318 for sound warning are provided at both ends of the hollow air storage plate 317.

[0021] In another embodiment, the first locking assembly 31 includes a first limiting mounting plate 319, which is fixedly connected to the mounting housing 1. A first adjustable locking plate 315 is provided on the side of the first limiting mounting plate 319 away from the mounting housing 1. Several first elastic driving members 313 are provided at both ends of the first limiting mounting plate 319 for driving the first adjustable locking plate 315 to move away from the mounting housing 1. The first elastic driving members 313 are metal springs. Several limiting through holes 314 are provided on the upper surface of the first adjustable locking plate 315. Several electric telescopic rods corresponding to the first limiting mounting plate 319 are provided at both ends of the first adjustable locking plate 315. In use, the position of the first adjustable locking plate 315 is adjusted by extending or retracting the electric telescopic rods. In this section, the first limiting mounting plate 319 has several elastic airbags 311 at both ends, which are used to cooperate with the first driving plate 310 to reduce noise. The elastic airbags 311 are hollow silicone airbags. The elastic airbags 311 are fixedly connected to the first driving plate 310. One end of the first elastic driving member 313 is fixedly connected to the first limiting mounting plate 319, and the other end of the first elastic driving member 313 is fixedly connected to the first adjustable locking plate 315. The first limiting mounting plate 319 has a hollow air storage plate 317 on the side facing the first adjustable locking plate 315. The hollow air storage plate 317 is a hollow silicone plate. Several air supply pipes 316 connected to the elastic airbags 311 are provided at both ends of the hollow air storage plate 317. Several sound tubes 318 for sound warning are provided at both ends of the hollow air storage plate 317.

[0022] Please see Figure 3 and Figure 6In one embodiment, to make the use of the protective component 33 more reliable, the protective component 33 preferably includes a movable protective plate 333. The movable protective plate 333 is disposed through the side wall of the mounting housing 1 and is slidably connected to the mounting housing 1. A third limiting mounting plate 334 is fixedly connected to one end of the movable protective plate 333 away from the mounting housing 1, and a second adjustable locking plate 332 is fixedly connected to the other end of the movable protective plate 333 for limiting and fixing the movable protective plate 333 in conjunction with the limiting through hole 314. A plurality of third elastic driving members 331 are provided on the side of the second adjustable locking plate 332 facing the movable protective plate 333 for cooperating with the mounting housing 1 to drive the second adjustable locking plate 332 to move away from the first adjustable locking plate 315. The third elastic driving members 331 are springs, one end of the third elastic driving member 331 is fixedly connected to the second adjustable locking plate 332, and the other end of the third elastic driving member 331 is fixedly connected to the mounting housing 1.

[0023] Please see Figure 3 In one embodiment, to enrich the functionality of the protective component 33, preferably, a fourth limiting mounting plate 337 is provided on the side of the third limiting mounting plate 334 away from the mounting housing 1. Limiting guide plates 330, which are slidably connected to the third limiting mounting plate 334, are fixedly connected to both ends of the fourth limiting mounting plate 337. A plurality of movable locking members 336, which are steel nails, are provided on the side of the fourth limiting mounting plate 337 away from the third limiting mounting plate 334. A plurality of fourth elastic driving members 335, which are springs, are provided at both ends of the third limiting mounting plate 334 to drive the fourth limiting mounting plate 337 to move away from the third limiting mounting plate 334. One end of the fourth elastic driving member 335 is fixedly connected to the third limiting mounting plate 334, and the other end is fixedly connected to the fourth limiting mounting plate 337.

[0024] In another embodiment, to make the use of the protective component 33 more reliable, the protective component 33 preferably includes a movable protective plate 333. The movable protective plate 333 is disposed through the side wall of the mounting housing 1 and is slidably connected to the mounting housing 1. A third limiting mounting plate 334 is fixedly connected to one end of the movable protective plate 333 away from the mounting housing 1, and a second adjustable locking plate 332 is fixedly connected to the other end of the movable protective plate 333 for limiting and fixing the movable protective plate 333 in conjunction with the limiting through hole 314. A plurality of third elastic driving members 331 are provided on the side of the second adjustable locking plate 332 facing the movable protective plate 333 for cooperating with the mounting housing 1 to drive the second adjustable locking plate 332 to move away from the first adjustable locking plate 315. The third elastic driving member 331 is an elastic rubber strip. One end of the third elastic driving member 331 is fixedly connected to the second adjustable locking plate 332, and the other end of the third elastic driving member 331 is fixedly connected to the mounting housing 1.

[0025] In another embodiment, to enrich the functionality of the protective component 33, preferably, a fourth limiting mounting plate 337 is provided on the side of the third limiting mounting plate 334 away from the mounting housing 1. Both ends of the fourth limiting mounting plate 337 are fixedly connected to limiting guide plates 330 that are slidably connected to the third limiting mounting plate 334. A plurality of movable locking members 336, which are iron plates, are provided on the side of the fourth limiting mounting plate 337 away from the third limiting mounting plate 334. Both ends of the third limiting mounting plate 334 are provided with a plurality of fourth elastic driving members 335, which are metal springs, used to drive the fourth limiting mounting plate 337 to move away from the third limiting mounting plate 334. One end of the fourth elastic driving member 335 is fixedly connected to the third limiting mounting plate 334, and the other end is fixedly connected to the fourth limiting mounting plate 337.

[0026] Please see Figure 3 and Figure 5In one embodiment, to make the use of the second locking assembly 32 more reliable, the second locking assembly 32 preferably includes a second limiting mounting plate 321. The lower surface of the second limiting mounting plate 321 has several second elastic driving members 320 at both ends, which cooperate with the mounting housing 1 to drive the second limiting mounting plate 321 to move towards the movable protective plate 333. Each second elastic driving member 320 is a spring. One end of each second elastic driving member 320 is fixedly connected to the second limiting mounting plate 321, and the other end is fixedly connected to the mounting housing 1. The side of the second limiting mounting plate 321 facing the movable protective plate 333 has several locking baffles 322 spaced apart, which cooperate with the second adjustable locking plate 332 to limit and lock the movable protective plate 333 to prevent it from moving towards the first adjustable locking plate 315. The locking baffles 322 are fixedly connected to the second limiting mounting plate 321.

[0027] In another embodiment, to reduce the cost of the second locking assembly 32, preferably, the second locking assembly 32 includes a second limiting mounting plate 321. The lower surface of the second limiting mounting plate 321 has several second elastic driving members 320 at both ends, which cooperate with the mounting housing 1 to drive the second limiting mounting plate 321 to move towards the movable protective plate 333. Each second elastic driving member 320 is a metal spring. One end of each second elastic driving member 320 is fixedly connected to the second limiting mounting plate 321, and the other end is fixedly connected to the mounting housing 1. The side of the second limiting mounting plate 321 facing the movable protective plate 333 has several locking baffles 322 spaced apart, which cooperate with the second adjustable locking plate 332 to limit and lock the movable protective plate 333 to prevent it from moving towards the first adjustable locking plate 315. The locking baffles 322 are fixedly connected to the second limiting mounting plate 321.

[0028] The working principle and usage process of this invention: During use, multiple protective structures are installed on the side wall, top, or bottom of the elevator's chassis. When the elevator is operating normally, the protective structures are retracted. In the event of an accidental fall or overshoot, a magnetic attraction is generated between the first drive plate 310 and the second drive plate 312 via PLC, microcontroller, or manual control by the user. At this time, the first adjustable locking plate 315 moves downwards under the magnetic attraction, disengaging from the second adjustable locking plate 332. The second adjustable locking plate 332 is then instantly ejected outwards under the driving action of the stretched third elastic drive member 331. During the outward ejection of the second adjustable locking plate 332, the second… The adjustable locking plate 332 drives the locking baffle 322 to move downward, so that the second adjustable locking plate 332 can pass through the locking baffle 322 normally (but if the second adjustable locking plate 332 moves in the opposite direction, the second adjustable locking plate 332 cannot drive the locking baffle 322 to move downward, and the second adjustable locking plate 332 is reliably fixed by the locking baffle 322). At this time, the movable locking member 336 is instantly pressed against the inner wall of the shaft, and the fourth elastic driving member 335 is in a compressed state. Thus, the fourth elastic driving member 335 can cooperate with the fourth limiting mounting plate 337 to apply pressure to the movable locking member 336, so that the movable locking member 336 is inserted into the side wall of the shaft to achieve reliable fixation of the elevator. Secondly, during the downward movement of the first adjustable locking plate 315, the first adjustable locking plate 315 pressurizes the air in the elastic airbag 311 into the hollow air storage plate 317 through the air supply pipe 316. At this time, the hollow air storage plate 317 is instantly inflated and expanded. Then, the air in the hollow air storage plate 317 is slowly discharged to the outside through the sound pipe 318. At this time, the sound pipe 318 emits a warning sound under the action of the airflow, so that the protective structure can continuously emit a warning sound for a certain period of time (until the excess gas in the hollow air storage plate 317 is completely discharged). Thus, through the cooperation of multiple structures, when the elevator encounters unexpected dangers such as falling or overshooting and needs protection, this application can provide limit braking protection for the elevator instantly, so that the protective structure can quickly respond to the user's protection needs and make the protective structure more effective. Secondly, this invention can be applied to different models of elevators, making the application scope of the protective structure wider. In addition, this invention has a simple structure and is easy to use, making it worthy of promotion and use.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A protective structure for a hoist, comprising a mounting housing, characterized in that: The mounting housing is internally equipped with a protective mechanism. On the side of the protective mechanism away from the mounting housing, there is a protective cover plate for sealing the opening end of the mounting housing. The mounting housing is fixedly connected to the protective cover plate. The protective mechanism includes a protective component for limiting and locking the elevator in conjunction with the mounting housing, a first locking component for limiting and fixing the protective component in conjunction with the mounting housing, and a second locking component for unidirectionally limiting and fixing the protective component in conjunction with the mounting housing to prevent the protective component from moving towards the first locking component. The protective component is located on both sides of the first locking component, and the second locking component is located on both sides of the first locking component. The second locking component is located on the side of the protective component facing the mounting housing.

2. The protective structure of the hoist as described in claim 1, characterized in that: The first locking assembly includes a first limiting mounting plate, which is fixedly connected to the mounting housing. A first adjustable locking plate is provided on the side of the first limiting mounting plate away from the mounting housing. Several first elastic driving members are provided at both ends of the first limiting mounting plate for driving the first adjustable locking plate to move away from the mounting housing. Several limiting through holes are opened on the upper surface of the first adjustable locking plate. Several second driving plates are provided at both ends of the first adjustable locking plate. Several first driving plates are provided at both ends of the first limiting mounting plate for cooperating with the second driving plates to drive the first adjustable locking plate to move closer to the first limiting mounting plate.

3. The protective structure of the hoisting machine according to claim 2, characterized in that: The first limiting mounting plate has several elastic airbags at both ends for cooperating with the first driving plate to reduce noise. The elastic airbags are fixedly connected to the first driving plate. One end of the first elastic driving member is fixedly connected to the first limiting mounting plate, and the other end of the first elastic driving member is fixedly connected to the first adjustable locking plate.

4. The protective structure of the hoisting machine according to claim 3, characterized in that: The first limiting mounting plate has a hollow air storage plate on the side facing the first adjustable locking plate. Several air supply pipes connected to the elastic airbag are provided at both ends of the hollow air storage plate. Several sound tubes for sound warning are provided at both ends of the hollow air storage plate.

5. The protective structure of the hoisting machine according to claim 4, characterized in that: The protective assembly includes a movable protective plate that penetrates the side wall of the mounting housing and is slidably connected to the mounting housing. A third limiting mounting plate is fixedly connected to one end of the movable protective plate away from the mounting housing, and a second adjustable locking plate is fixedly connected to the other end of the movable protective plate to limit and fix the movable protective plate in conjunction with the limiting through hole. The second adjustable locking plate has a plurality of third elastic driving members on the side facing the movable protective plate to cooperate with the mounting housing to drive the second adjustable locking plate to move away from the first adjustable locking plate.

6. The protective structure of the hoisting machine according to claim 5, characterized in that: A fourth limiting mounting plate is provided on the side of the third limiting mounting plate away from the mounting housing. The two ends of the fourth limiting mounting plate are fixedly connected to limiting guide plates that are slidably connected to the third limiting mounting plate. One end of the third elastic drive member is fixedly connected to the second adjustable locking plate, and the other end of the third elastic drive member is fixedly connected to the mounting housing.

7. The protective structure of the hoisting machine according to claim 6, characterized in that: The fourth limiting mounting plate has several movable locking members on the side away from the third limiting mounting plate for limiting and fixing the fourth limiting mounting plate. The third limiting mounting plate has several fourth elastic driving members at both ends for driving the fourth limiting mounting plate to move away from the third limiting mounting plate. One end of the fourth elastic driving member is fixedly connected to the third limiting mounting plate, and the other end of the fourth elastic driving member is fixedly connected to the fourth limiting mounting plate.

8. The protective structure of the hoisting machine according to claim 7, characterized in that: The second locking assembly includes a second limiting mounting plate. The lower surface of the second limiting mounting plate is provided with a plurality of second elastic driving members at both ends for cooperating with the mounting housing to drive the second limiting mounting plate to move toward the movable protective plate. One end of the second elastic driving member is fixedly connected to the second limiting mounting plate, and the other end of the second elastic driving member is fixedly connected to the mounting housing.

9. The protective structure of the hoisting machine according to claim 8, characterized in that: The second limiting mounting plate has several locking baffles spaced apart on the side facing the movable protective plate. These baffles are used to cooperate with the second adjustable locking plate to limit and lock the movable protective plate, preventing it from moving closer to the first adjustable locking plate. The locking baffles are fixedly connected to the second limiting mounting plate.

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