Safety protection device for hoisting machinery

Abstract

The invention discloses a hoisting machinery safety protection device which comprises a protection box, a box door arranged on the front portion of the protection box, a hook fixedly connected to the top of the protection box, a placing plate fixedly installed in the protection box and a connecting assembly arranged on one side of the protection box. A moving mechanism is arranged in the protection box, an anti-collision mechanism is arranged on the outer side of the protection box, the end, away from a first connecting rod, of a first spring is fixedly connected with a connecting plate, the output end of a second electric push rod is fixedly connected with a top plate, and a limiting column is movably connected with the top plate. The problems that according to an existing device, a pressing plate is inconvenient to disassemble, after the pressing plate is used for a long time, the surface of the pressing plate is likely to become smooth, the fixing effect on an object is influenced, the stability of the object in the working process is influenced, and then the protection effect on the object is influenced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of lifting machinery, and in particular to a lifting machinery safety protection device. Background Art

[0002] Lifting machinery refers to electromechanical equipment used for vertical lifting or vertical lifting and horizontal movement of heavy objects. Its scope is defined as elevators with a rated lifting capacity greater than or equal to 0.5t; cranes with a rated lifting capacity greater than or equal to 1t and a lifting height greater than or equal to 2m, and electric hoists with fixed load-bearing forms, etc. Lifting operation is an industrial process of transporting mechanical equipment or other objects from one place to another. The working process generally includes the steps of lifting, running, lowering and returning to the original position.

[0003] According to a lifting machinery safety protection device disclosed in patent publication number CN 111591872 B, the device is provided with a transmission device so that the lifting device drives a clamping plate to fasten the object; however, the clamping plate of the device is inconvenient to disassemble, and when the clamping plate is used for a long time, the surface tends to become smooth, which affects the fixing effect of the object, thereby affecting the stability of the object during work, and further affecting the protection effect of the object.

[0004] Therefore, we proposed a lifting machinery safety protection device to solve the problem. Summary of the invention

[0005] The object of the present invention is to provide a lifting machinery safety protection device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a lifting machinery safety protection device, comprising a protection box;

[0007] A box door arranged at the front of the protection box;

[0008] Fix the hook connected to the top of the protective box;

[0009] A placement plate fixedly installed inside the protection box;

[0010] And a connecting component arranged on one side of the protection box, the connecting component includes a fixing mechanism arranged inside the protection box, a moving mechanism is arranged inside the protection box, and an anti-collision mechanism is arranged outside the protection box.

[0011] According to the above technical solution, the fixing mechanism includes a first electric push rod fixedly installed on the upper part of the placement plate through a base, the output end of the first electric push rod is fixedly connected to a connecting plate, a first connecting column is movably connected inside the connecting plate, the outer end of the first connecting column is fixedly connected to the first connecting rod, the inner side of the first connecting rod is fixedly connected to the first spring, the first connecting column is fixedly connected to the fixing plate at one end away from the first connecting rod, a vertical plate is fixedly installed on the upper part of the connecting plate, an adjusting plate is sleeved inside the vertical plate, a second electric push rod is fixedly installed on the outer side of the vertical plate through the base, a top plate is fixedly installed on the top of the adjusting plate, a third electric push rod is fixedly installed on the upper part of the top plate, and the third The output end of the electric push rod is fixedly installed with a pressure plate, the upper part of the pressure plate is fixedly connected to a limiting column, one side of the fixing plate is provided with a convex groove, the inner wall of the convex groove is slidably connected with a convex column, the outer side of the convex column is fixedly connected with an anti-slip plate, the front of the fixing plate is provided with a sliding groove, the inner wall of the sliding groove is fixedly connected with a sliding rod, the outer wall of the sliding rod is slidably connected with a sliding block, the inner wall of the sliding groove is fixedly connected with a second spring, the outer side of the sliding block is fixedly connected with a limiting rod, the outer side of the limiting rod is fixedly connected with a fixing block, the inside of the fixing block is movably connected with a second connecting rod through a pin, and the second connecting rod is movably connected with a connecting seat through a pin at one end away from the fixing block, and the outer side of the connecting seat is fixedly connected with a handle.

[0012] According to the above technical solution, the anti-collision mechanism includes a hollow column arranged on the outside of the protection box, a solid column is sleeved inside the hollow column, a pressure groove is opened on the side wall of the solid column, a third spring is fixedly connected to the inner wall of the hollow column, a pressure column is movably connected inside the hollow column, the outer end of the pressure column is fixedly connected to a limit block, a fourth spring is fixedly connected to the inner side of the limit block, and the outer end of the solid column is fixedly connected to an anti-collision plate.

[0013] According to the above technical solution, the mobile mechanism includes a mounting column movably connected to the bottom of the protection box, the top side wall of the mounting column is fixedly connected to a connecting block, the bottom of the inner wall of the protection box is fixedly installed with a hydraulic cylinder, an inner groove is opened inside the mounting column, a damper is fixedly installed on the inner wall of the inner groove, a fifth spring is fixedly connected to the inner wall of the inner groove, a second connecting column is sleeved inside the inner groove, a moving wheel is arranged at the bottom of the second connecting column, and a support seat is fixedly installed at the bottom of the protection box.

[0014] According to the above technical scheme, the first spring is fixedly connected to the connecting plate at one end away from the first connecting rod, the output end of the second electric push rod is fixedly connected to the top plate, and the limit column is movably connected to the top plate. Through the cooperation of the first electric push rod, the connecting plate, the first connecting column, the first connecting rod, the first spring, the fixed plate, the vertical plate, the adjustment plate, the top plate, the second electric push rod, the third electric push rod, the pressure plate, and the limit column, the side and the top of the article can be fixed at the same time. At the same time, by providing an anti-slip plate, the article can be less likely to slide after being fixed, thereby achieving a better fixing effect and making the article more stable during transportation, thereby preventing the article from being damaged by collision during transportation and preventing the article from falling during lifting, thereby ensuring safety during the working process. When the fixed plate presses and fixes the article, it can play a buffering effect to prevent excessive instantaneous low pressure from causing damage to the article.

[0015] According to the above technical solution, one end of the second spring is fixedly connected to the slider, and the inner side of the limit rod is fitted with the outer side of the convex column. Through the cooperation of the convex groove, convex column, slide groove, slide rod, slider, second spring, limit rod, fixed block, second connecting rod and connecting seat, it is convenient for manual replacement of the anti-slip plate with greater wear in time, thereby achieving a better fixing effect on the objects.

[0016] According to the above technical solution, there are three hollow columns, which are respectively arranged on the four sides of the protection box, and one of the hollow columns is fixedly connected to the box door, and the other three hollow columns are fixedly connected to the outer wall of the protection box. Through the cooperation of the hollow columns, solid columns, pressure grooves, the third spring, pressure columns, limit blocks, fourth springs, and anti-collision plates, the protection box can be prevented from colliding with the outside world during the lifting process, thereby further protecting the items fixed in the protection box.

[0017] According to the above technical solution, one end of the third spring is fixedly connected to the solid column, one end of the fourth spring away from the limit block is fixedly connected to the hollow column, the pressing column is pressed against the pressing groove, and the pressing end of the pressing column is hemispherical.

[0018] According to the above technical solution, the output end of the hydraulic cylinder is fixedly connected to the connecting block, the bottom end of the fifth spring is fixedly connected to the second connecting column, and the bottom end of the damper is fixedly connected to the second connecting column. Through the cooperation of the mounting column, the hydraulic cylinder, the connecting block, the inner groove, the damper, the second connecting column, the fifth spring, the moving wheel, and the support seat, the protection box can move relative to the ground, thereby facilitating manual movement of the protection box, and then facilitating manual transfer operations on the items fixed in the protection box, thereby increasing the applicability of the device. At the same time, when the protection box is bumped during the movement, it can have a shock-absorbing effect, thereby further protecting the items fixed in the protection box.

[0019] According to the above technical solution, there are four support seats, which are arranged in groups of two and symmetrically distributed at the bottom of the protection box.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] (1) The present invention is provided with a fixing mechanism, which facilitates manual replacement of the anti-slip plate with severe wear in a timely manner under the action of the convex groove, convex column, slide groove, slide rod, slider, second spring, limit rod, fixing block, second connecting rod and connecting seat, thereby achieving a better fixing effect on the objects.

[0022] (2) The present invention, by providing a fixing mechanism, can simultaneously fix the side and top of the article under the action of the first electric push rod, the connecting plate, the first connecting column, the first connecting rod, the first spring, the fixing plate, the vertical plate, the adjusting plate, the top plate, the second electric push rod, the third electric push rod, the pressure plate, and the limiting column. At the same time, by providing an anti-slip plate, the article is not easy to slide after being fixed, so that the fixing effect can be better, and the article can be made more stable during the transportation process, thereby preventing the article from being damaged by collision during the transportation process, and preventing the article from falling during the lifting process, thereby ensuring the safety during the working process. When the fixing plate presses and fixes the article, it can play a buffering effect, which can prevent the instantaneous low pressure from being too large and causing damage to the article.

[0023] (3) The present invention is provided with an anti-collision mechanism. Under the action of the hollow column, the solid column, the pressure groove, the third spring, the pressure column, the limit block, the fourth spring and the anti-collision plate, the protection box can be prevented from colliding with the outside world during the lifting process, thereby further protecting the items fixed in the protection box.

[0024] (4) The present invention is provided with a moving mechanism, under the action of the mounting column, the hydraulic cylinder, the connecting block, the inner groove, the damper, the second connecting column, the fifth spring, the moving wheel and the supporting seat, the protection box can be moved relative to the ground, thereby facilitating manual movement of the protection box and further facilitating manual transfer operations of the items fixed in the protection box, thereby increasing the applicability of the device. At the same time, when the protection box is bumped during movement, it can have a shock-absorbing effect, thereby further protecting the items fixed in the protection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the fixing mechanism structure of the present invention;

[0029] Figure 4 It is a partial structural schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the anti-collision mechanism of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the mobile mechanism of the present invention;

[0032] In the figure: 1, protection box; 2, box door; 3, connecting assembly; 31, fixing mechanism; 311, first electric push rod; 312, connecting plate; 313, first connecting column; 314, first connecting rod; 315, first spring; 316, fixing plate; 317, vertical plate; 318, adjusting plate; 319, top plate; 3110, second electric push rod; 3111, third electric push rod; 3112, pressing plate; 3113, limiting column; 3114, convex groove; 3115, convex column; 3116, anti-slip plate; 3117, slide groove; 3118, slide rod; 3119, slide block; 3120, second Spring; 3121, limit rod; 3122, fixed block; 3123, second connecting rod; 3124, connecting seat; 32, anti-collision mechanism; 321, hollow column; 322, solid column; 323, pressure groove; 324, third spring; 325, pressure column; 326, limit block; 327, fourth spring; 328, anti-collision plate; 33, moving mechanism; 331, mounting column; 332, hydraulic cylinder; 333, connecting block; 334, inner groove; 335, damper; 336, second connecting column; 337, fifth spring; 338, moving wheel; 339, supporting seat; 4, hook; 5, placement plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Figure 1-6As shown, the present invention provides a technical solution: a lifting machinery safety protection device, comprising a protection box 1, a box door 2 arranged at the front of the protection box 1, a hook 4 fixedly connected to the top of the protection box 1, a placement plate 5 fixedly installed inside the protection box 1, and a connecting component 3 arranged on one side of the protection box 1, the connecting component 3 includes a fixing mechanism 31 arranged inside the protection box 1, a moving mechanism 33 is arranged inside the protection box 1, an anti-collision mechanism 32 is arranged outside the protection box 1, and the fixing mechanism 31 includes a first electric fixedly installed on the upper part of the placement plate 5 through a base Push rod 311, the output end of the first electric push rod 311 is fixedly connected to a connecting plate 312, the connecting plate 312 is movably connected to a first connecting column 313, the outer end of the first connecting column 313 is fixedly connected to a first connecting rod 314, the inner side of the first connecting rod 314 is fixedly connected to a first spring 315, the first connecting column 313 is fixedly connected to a fixing plate 316 at one end away from the first connecting rod 314, a vertical plate 317 is fixedly installed on the upper part of the connecting plate 312, an adjusting plate 318 is sleeved inside the vertical plate 317, and the outer side of the vertical plate 317 is fixedly installed through a base A second electric push rod 3110 is provided, a top plate 319 is fixedly installed on the top of the adjustment plate 318, a third electric push rod 3111 is fixedly installed on the top of the top plate 319, a pressing plate 3112 is fixedly installed on the output end of the third electric push rod 3111, a limiting column 3113 is fixedly connected to the upper part of the pressing plate 3112, a convex groove 3114 is provided on one side of the fixing plate 316, a convex column 3115 is slidably connected to the inner wall of the convex groove 3114, an anti-slip plate 3116 is fixedly connected to the outer side of the convex column 3115, a sliding groove 3117 is provided on the front of the fixing plate 316, and a sliding groove 3117 is provided on the front of the fixing plate 316. A sliding rod 3118 is fixedly connected to the inner wall of the groove 3117, a sliding block 3119 is slidably connected to the outer wall of the sliding rod 3118, a second spring 3120 is fixedly connected to the inner wall of the sliding groove 3117, a limiting rod 3121 is fixedly connected to the outer side of the sliding block 3119, a fixed block 3122 is fixedly connected to the outer side of the limiting rod 3121, a second connecting rod 3123 is movably connected to the inside of the fixed block 3122 through a pin, the second connecting rod 3123 is movably connected to a connecting seat 3124 at one end away from the fixed block 3122 through a pin, and a handle is fixedly connected to the outer side of the connecting seat 3124.

[0035] In this embodiment, the first spring 315 is fixedly connected to the connecting plate 312 at one end away from the first connecting rod 314, the output end of the second electric push rod 3110 is fixedly connected to the top plate 319, and the limiting column 3113 is movably connected to the top plate 319, through the first electric push rod 311, the connecting plate 312, the first connecting column 313, the first connecting rod 314, the first spring 315, the fixing plate 316, the vertical plate 317, the adjusting plate 318, the top plate 319, the second electric push rod 3110, the third electric push rod 3111, the pressing plate 3112, the limiting column The cooperation of 3113 can fix the side and the top of the article at the same time. At the same time, by setting the anti-slip plate 3116, the article is not easy to slide after being fixed, so that the fixing effect can be better, and the article can be more stable during transportation, thereby preventing the article from being damaged by collision during transportation, and preventing the article from falling during the lifting process, thereby ensuring the safety of the work process, and when the fixing plate 316 presses and fixes the article, it can play a buffering effect to prevent the instantaneous low pressure from being too large and causing damage to the article.

[0036] Furthermore, one end of the second spring 3120 is fixedly connected to the slider 3119, and the inner side of the limiting rod 3121 is fitted with the outer side of the convex column 3115. Through the cooperation of the convex groove 3114, the convex column 3115, the sliding groove 3117, the sliding rod 3118, the slider 3119, the second spring 3120, the limiting rod 3121, the fixing block 3122, the second connecting rod 3123, and the connecting seat 3124, it is convenient for manual replacement of the anti-slip plate 3116 with greater wear in time, thereby achieving a better fixing effect on the objects.

[0037] When the device is in use, the box door 2 is first opened manually, and then the objects to be transported are placed on the upper part of the placement plate 5 manually, and then the top plate 319 is driven downward by the second electric push rod 3110 to adjust according to the height of the objects. When the height is adjusted to a suitable height, the first electric push rod 311 drives the connecting plate 312 to move toward the middle. Under the action of the first connecting column 313, the first connecting rod 314, and the first spring 315, the fixing plate 316 fixedly connected to one end of the first connecting column 313 can be synchronously moved toward the middle, and then the side wall of the object can be pressed and fixed. When the fixing plate 316 contacts the object, the first spring 315 can play a buffering effect under the action of the elastic force, which can prevent the instantaneous low pressure from being too large and causing damage to the objects. At the same time, by setting the anti-slip plate 3116, the objects can be prevented from sliding after being fixed, so that the fixing effect can be better, so that the objects can be more stable during the transportation process, and thus the objects can be prevented from sliding during the transfer. The third electric push rod 3111 drives the pressure plate 3112 to move downward, so that the top of the object can be further fixed, so that the fixing effect of the object can be better. Furthermore, when it is necessary to disassemble the anti-slip plate 3116, it is only necessary to manually hold the handle and pull the connecting seat 3124 outward. Under the action of the second connecting rod 3123 and the fixing block 3122, the limiting rod 3121 fixedly connected to the inner side of the fixing block 3122 can be subjected to tension. Subsequently, under the action of the slider 3119 and the slider 3118, the limiting rod 3121 fixedly connected to the outer side of the slider 3119 can be away from the front part of the convex column 3115. Subsequently, the anti-slip plate 3116 can be manually taken out, so that it is convenient for manual replacement of the anti-slip plate 3116 with greater wear in time, so as to achieve a better fixing effect on the object.

[0038] Embodiment 2: Based on Embodiment 1, a preferred embodiment of a lifting machinery safety protection device provided by the present invention is as follows: Figure 1-6 As shown: the anti-collision mechanism 32 includes a hollow column 321 arranged on the outside of the protection box 1, a solid column 322 is sleeved inside the hollow column 321, a pressure groove 323 is opened on the side wall of the solid column 322, a third spring 324 is fixedly connected to the inner wall of the hollow column 321, a pressure column 325 is movably connected inside the hollow column 321, the outer end of the pressure column 325 is fixedly connected to a limit block 326, the inner side of the limit block 326 is fixedly connected to a fourth spring 327, and the outer end of the solid column 322 is fixedly connected to an anti-collision plate 328.

[0039] In this embodiment, there are three hollow columns 321, which are respectively arranged on the four sides of the protection box 1, and one of the hollow columns 321 is fixedly connected to the box door 2, and the other three hollow columns 321 are fixedly connected to the outer wall of the protection box 1. Through the cooperation of the hollow column 321, the solid column 322, the pressure groove 323, the third spring 324, the pressure column 325, the limit block 326, the fourth spring 327, and the anti-collision plate 328, the protection box 1 can be prevented from colliding with the outside world during the lifting process, thereby further protecting the items fixed in the protection box 1.

[0040] Furthermore, one end of the third spring 324 is fixedly connected to the solid column 322, one end of the fourth spring 327 away from the limit block 326 is fixedly connected to the hollow column 321, the pressing column 325 is pressed against the pressing groove 323, and the pressing end of the pressing column 325 is hemispherical.

[0041] When the protection box 1 collides with the outside world, the anti-collision plate 328 will first come into contact with the outside world, and then under the action of the collision force, the solid column 322 and the hollow column 321 will slide relative to each other, so that the third spring 324 will be deformed, and then a buffering effect can be achieved, thereby protecting the protection box 1 and the objects fixed in the protection box 1. When the solid column 322 and the hollow column 321 slide relative to each other, the fourth spring 327 can make the pressing column 325 and the pressing groove 323 slide relative to each other under the action of the elastic force, so that under the joint action of the pressing force and the friction force, the elastic potential energy generated by the third spring 324 in the buffering process can be reduced, thereby achieving a shock absorbing effect, thereby preventing the anti-collision plate 328 from continuing to shake after colliding with the outside world, thereby preventing the protection box 1 from being shaken synchronously, thereby ensuring stability during transportation.

[0042] Embodiment 3: Based on Embodiment 1, a preferred embodiment of a lifting machinery safety protection device provided by the present invention is as follows: Figure 1-6 As shown: the moving mechanism 33 includes a mounting column 331 movably connected to the bottom of the protection box 1, a connecting block 333 is fixedly connected to the top side wall of the mounting column 331, a hydraulic cylinder 332 is fixedly installed at the bottom of the inner wall of the protection box 1, an inner groove 334 is opened inside the mounting column 331, a damper 335 is fixedly installed on the inner wall of the inner groove 334, a fifth spring 337 is fixedly connected to the inner wall of the inner groove 334, a second connecting column 336 is sleeved inside the inner groove 334, a moving wheel 338 is arranged at the bottom of the second connecting column 336, and a support seat 339 is fixedly installed at the bottom of the protection box 1.

[0043] In this embodiment, the output end of the hydraulic cylinder 332 is fixedly connected to the connecting block 333, the bottom end of the fifth spring 337 is fixedly connected to the second connecting column 336, and the bottom end of the damper 335 is fixedly connected to the second connecting column 336. Through the cooperation of the mounting column 331, the hydraulic cylinder 332, the connecting block 333, the inner groove 334, the damper 335, the second connecting column 336, the fifth spring 337, the moving wheel 338, and the support seat 339, the protection box 1 can be made to move relative to the ground, thereby facilitating manual movement of the protection box 1, and then facilitating manual transfer operations on the items fixed in the protection box 1, thereby increasing the applicability of the device. At the same time, when the protection box 1 is bumped during the movement, it can have a shock-absorbing effect, thereby further protecting the items fixed in the protection box 1.

[0044] Furthermore, there are four support seats 339 , which are arranged in groups of two and symmetrically distributed at the bottom of the protection box 1 .

[0045] When the protection box 1 needs to be transported, the hydraulic cylinder 332 drives the connecting block 333 to move downward, so that the mounting column 331 can move downward synchronously, and under the action of the second connecting column 336, the moving wheel 338 arranged at the lower part of the second connecting column 336 can move downward synchronously. When the moving wheel 338 moves downward and contacts the ground, under the interaction of forces, the supporting seat 339 can be kept away from the ground, and then the protection box 1 can be transported, so as to facilitate manual transportation of objects to the designated location, thereby increasing the applicability of the device, and when the device is bumped during movement, under the action of gravity, The second connecting column 336 and the mounting column 331 can slide relative to each other, so that under the action of the damper 335 and the fifth spring 337, a shock-absorbing effect can be achieved, thereby further protecting the items fixed in the protection box 1. Furthermore, when the protection box 1 falls, the hydraulic cylinder 332 is driven by the hydraulic cylinder 332 to move slightly downward, so that the moving wheel 338 exceeds the distance of one end of the support seat 339, so that when the moving wheel 338 contacts the ground, under the action of the fourth spring 327 and the damper 335, a shock-absorbing effect can also be achieved, thereby further protecting the items in the protection box 1.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lifting machinery safety protection device, comprising a protection box (1); A box door (2) arranged at the front of the protection box (1); A hook (4) fixedly connected to the top of the protection box (1); A placement plate (5) fixedly mounted inside the protection box (1); and a connecting assembly (3) arranged on one side of the protection box (1), characterized in that: The connection assembly (3) comprises a fixing mechanism (31) arranged inside the protection box (1), a moving mechanism (33) is arranged inside the protection box (1), and an anti-collision mechanism (32) is arranged outside the protection box (1).

2. A lifting machinery safety protection device according to claim 1, characterized in that: The fixing mechanism (31) comprises a first electric push rod (311) fixedly mounted on the upper part of the placement plate (5) through a base, the output end of the first electric push rod (311) is fixedly connected to a connecting plate (312), the connecting plate (312) is internally movably connected to a first connecting column (313), the outer end of the first connecting column (313) is fixedly connected to a first connecting rod (314), the inner side of the first connecting rod (314) is fixedly connected to a first spring (315), and the first connecting column (313) is away from the first connecting rod (314). One end is fixedly connected with a fixing plate (316), a vertical plate (317) is fixedly installed on the upper part of the connecting plate (312), an adjusting plate (318) is sleeved inside the vertical plate (317), a second electric push rod (3110) is fixedly installed on the outer side of the vertical plate (317) through a base, a top plate (319) is fixedly installed on the top of the adjusting plate (318), a third electric push rod (3111) is fixedly installed on the upper part of the top plate (319), and a pressure plate (3112) is fixedly installed on the output end of the third electric push rod (3111), The upper part of the pressure plate (3112) is fixedly connected to a limiting column (3113), a convex groove (3114) is provided on one side of the fixed plate (316), a convex column (3115) is slidably connected to the inner wall of the convex groove (3114), an anti-slip plate (3116) is fixedly connected to the outer side of the convex column (3115), a sliding groove (3117) is provided at the front of the fixed plate (316), a sliding rod (3118) is fixedly connected to the inner wall of the sliding groove (3117), and a sliding block (3119) is slidably connected to the outer wall of the sliding rod (3118). ), the inner wall of the slide groove (3117) is fixedly connected with a second spring (3120), the outer side of the slider (3119) is fixedly connected with a limit rod (3121), the outer side of the limit rod (3121) is fixedly connected with a fixed block (3122), the interior of the fixed block (3122) is movably connected with a second connecting rod (3123) through a pin, the end of the second connecting rod (3123) away from the fixed block (3122) is movably connected with a connecting seat (3124) through a pin, and the outer side of the connecting seat (3124) is fixedly connected with a handle.

3. A lifting machinery safety protection device according to claim 1, characterized in that: The anti-collision mechanism (32) comprises a hollow column (321) arranged outside the protection box (1), a solid column (322) is sleeved inside the hollow column (321), a side wall of the solid column (322) is provided with a pressing groove (323), a third spring (324) is fixedly connected to the inner wall of the hollow column (321), a pressing column (325) is movably connected inside the hollow column (321), the outer end of the pressing column (325) is fixedly connected to a limit block (326), the inner side of the limit block (326) is fixedly connected to a fourth spring (327), and the outer end of the solid column (322) is fixedly connected to an anti-collision plate (328).

4. A lifting machinery safety protection device according to claim 1, characterized in that: The moving mechanism (33) comprises a mounting column (331) movably connected to the bottom of the protection box (1); a connecting block (333) is fixedly connected to the top side wall of the mounting column (331); a hydraulic cylinder (332) is fixedly installed at the bottom of the inner wall of the protection box (1); an inner groove (334) is provided inside the mounting column (331); a damper (335) is fixedly installed on the inner wall of the inner groove (334); a fifth spring (337) is fixedly connected to the inner wall of the inner groove (334); a second connecting column (336) is sleeved inside the inner groove (334); a moving wheel (338) is arranged at the bottom of the second connecting column (336); and a support seat (339) is fixedly installed at the bottom of the protection box (1).

5. A lifting machinery safety protection device according to claim 2, characterized in that: The end of the first spring (315) away from the first connecting rod (314) is fixedly connected to the connecting plate (312), the output end of the second electric push rod (3110) is fixedly connected to the top plate (319), and the limiting column (3113) is movably connected to the top plate (319).

6. A lifting machinery safety protection device according to claim 2, characterized in that: One end of the second spring (3120) is fixedly connected to the slider (3119), and the inner side of the limiting rod (3121) is arranged to fit the outer side of the convex column (3115).

7. A lifting machinery safety protection device according to claim 3, characterized in that: There are three hollow columns (321) which are respectively arranged on four sides of the protection box (1), and one of the hollow columns (321) is fixedly connected to the box door (2), while the other three hollow columns (321) are all fixedly connected to the outer wall of the protection box (1).

8. A lifting machinery safety protection device according to claim 3, characterized in that: One end of the third spring (324) is fixedly connected to the solid column (322), one end of the fourth spring (327) away from the limit block (326) is fixedly connected to the hollow column (321), the pressing column (325) is pressed against the pressing groove (323), and the pressing end of the pressing column (325) is hemispherical.

9. A lifting machinery safety protection device according to claim 4, characterized in that: The output end of the hydraulic cylinder (332) is fixedly connected to the connecting block (333), the bottom end of the fifth spring (337) is fixedly connected to the second connecting column (336), and the bottom end of the damper (335) is fixedly connected to the second connecting column (336).

10. A lifting machinery safety protection device according to claim 4, characterized in that: There are four support seats (339) in number, arranged in groups of two, and symmetrically distributed at the bottom of the protection box (1).

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