A crane winch safety protection device

Abstract

The invention discloses a crane winch safety protection device, which belongs to the technical field of crane protection. By arranging a fixing strip, a T-shaped clip strip, a rectangular installation strip, a fixing pin and a cable guide mechanism, the rectangular installation strip is clamped between two groups of fixing strips corresponding to the T-shaped clip strip, and the position of the rectangular installation strip between the two groups of fixing strips is adjusted so that the fixing pin corresponds to the position of the fixing socket, and then a lever is rotated to move inside a concave slot, so that a fixing spring rebounds to push the fixing pin out of a mounting block and insert it into a corresponding fixing socket, and the lever is rotated to clamp and fix it inside the concave slot, so that the rectangular installation strip is conveniently clamped and fixed at the top of a mounting bottom plate between two groups of mounting side plates, so that the cable guide mechanism can be clamped and fixed at a suitable position at the bottom of an I-type winding drum, ensuring that the crane cable can bypass the guide roller and be tightened, thereby reducing the potential safety hazards caused by loose and swinging crane cables.

Description

Technical Field

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

[0002] As an electric crane, the crane is widely used in construction, bridges, metallurgy, mining and other enterprises. It is mainly composed of an electric motor, a reducer, a drum, a rope and a braking device. The motor provides power to drive the drum to rotate, the reducer is used to adjust the rotation speed of the motor, the drum is the core component, the rope is wound around the drum for lifting and lowering goods, and the braking device is used to control the rotation speed of the drum and stop the movement. When the crane is hoisting, the crane cable is gradually straightened and tightened. When lifting heavier objects, the crane cable is prone to breakage. The broken crane cable will rebound and collide everywhere, causing damage to personnel or equipment around the crane. In order to reduce the rebound when the crane cable breaks, a guide mechanism will be installed in the crane to allow the crane cable to bypass the guide mechanism. At the same time, when the crane cable breaks, the guide mechanism will consume the rebound force when the crane cable breaks to avoid the crane cable breaking and rebounding everywhere.

[0003] The existing crane guide mechanism is generally connected and fixed to the crane by bolts. It is difficult to arbitrarily adjust the position of the guide roller at the bottom of the industrial winding drum according to the needs of the crane hoisting or the thickness of the crane cable. It is easy for the crane cable to become loose when passing around the guide roller, causing the crane cable to shake during hoisting, thereby causing safety hazards. Therefore, improvement is needed. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a crane winch safety protection device, which solves the problem that the existing crane guide mechanism is generally connected and fixed to the crane by bolts, and it is difficult to arbitrarily adjust the position of the guide roller at the bottom of the industrial winding drum according to the needs of the crane winch or the thickness of the crane cable.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a crane winch safety protection device, comprising a mounting base plate, a cable winding mechanism is fixedly installed on one side of the top of the mounting base plate, a winding motor is fixedly installed on the top of the mounting base plate located on one side of the cable winding mechanism, a protective cover is slidably installed on the top of the surface of the cable winding mechanism, three groups of rectangular mounting strips are equidistantly provided on the top of the mounting base plate located inside the cable winding mechanism, and a cable guide mechanism is fixedly installed on the top of the rectangular mounting strip located inside the cable winding mechanism.

[0006] As a further solution of the present invention: fixing strips are symmetrically fixedly installed on the top of the mounting base plate, a plurality of fixing sockets are equidistantly provided on the surface of the fixing strips, three groups of T-shaped clips are fixedly installed on the top of the mounting base plate between two groups of fixing strips, and fixing hooks are respectively fixedly installed at positions corresponding to the fixing strips on both sides of the mounting base plate.

[0007] As a further solution of the present invention: the cable winding mechanism includes two groups of mounting side panels, and the mounting side panels are fixedly installed on the top of the fixing bar, and positioning slots are symmetrically provided on both sides of the surface of the mounting side panels, and an I-type winding drum is rotatably installed on the top between the two groups of the mounting side panels, and a crane cable is provided on the surface of the I-type winding drum, and one end of the I-type winding drum passes through the mounting side panels and is fixedly installed with a driven gear.

[0008] As a further solution of the present invention: a driving gear is fixedly mounted on the output end of the winding motor, and the driving gear and the driven gear are meshed with each other.

[0009] As a further solution of the present invention: positioning strips are symmetrically fixedly installed on both sides of the inner wall of the protective cover, and the positioning strips correspond to the position of the positioning slots and have the same shape; fixing blocks are fixedly installed on both sides of the outer surface of the protective cover, and the position of the fixing blocks corresponds to the position of the fixed hooks; a rotating card plate is rotatably installed on the surface of the fixed block, and a fixed card slot is provided on the surface of the rotating card plate, and the fixed card slot corresponds to the shape of the fixed hook.

[0010] As a further solution of the present invention: three groups of T-shaped slots are equidistantly provided at the bottom of the rectangular mounting strip, and the T-shaped slots correspond to the positions of the T-shaped strips, mounting blocks are symmetrically fixedly installed at both ends of one side of the rectangular mounting strip, a concave slot is provided on the surface of the mounting block, a mounting column is fixedly installed at one end inside the mounting block, a fixing pin is slidably installed at one end of the mounting column, and an end of the fixing pin away from the mounting column passes through the mounting block and extends to the outside of the mounting block, a fixing spring is provided on the surface of the mounting column on one side of the fixing pin, a lever is fixedly installed on the surface of one end of the fixing pin located inside the mounting block, and the lever passes through the concave slot.

[0011] As a further solution of the present invention: the cable guiding mechanism includes two groups of mounting seats, a rectangular groove is provided inside the mounting seat, limiting slide grooves are symmetrically provided on both sides of the mounting seat, and the limiting slide grooves are connected to the rectangular grooves, a mounting slide rod is fixedly installed inside the rectangular groove, a sliding block is slidably installed on the surface of the mounting slide rod, limiting convex strips are symmetrically fixedly installed on both sides of the sliding block, and the limiting convex strips are slidably connected to the inside of the limiting slide groove, buffer springs are symmetrically provided on the surfaces of the mounting slide rods on both sides of the sliding block, a mounting rod is fixedly installed between the two groups of sliding blocks, and a guide roller is rotatably installed on the surface of the mounting rod between the two groups of sliding blocks.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In the present invention, by arranging a fixing strip, a T-shaped clip strip, a rectangular mounting strip, a fixing pin and a cable guide mechanism, the lever is pushed to move inside the concave slot, the fixing spring is squeezed and deformed on the surface of the mounting column, and the fixing pin is retracted into the mounting block, and the rectangular mounting strip corresponding to the T-shaped clip strip is clamped between the two groups of fixing strips. After adjusting the position of the rectangular mounting strip between the two groups of fixing strips so that the fixing pin corresponds to the position of the fixing plug hole, the lever is rotated to move inside the concave slot, so that the fixing spring rebounds to push the fixing pin out of the mounting block and insert it into the corresponding fixing plug hole, and the lever is rotated to clamp and fix it inside the concave slot, so as to facilitate the clamping and fixing of the rectangular mounting strip at the top of the mounting bottom plate between the two groups of mounting side plates, so that the cable guide mechanism can be clamped and fixed at a suitable position at the bottom of the I-type winding drum, ensuring that the crane cable can bypass the guide roller and be tightened, thereby reducing the safety hazards caused by loose and swinging crane cables.

[0014] 2. In the present invention, by arranging an I-type winding drum, a winding motor, an installation slide bar, a sliding block, a buffer spring and a guide roller, after the crane cable is passed around three groups of guide rollers in an S shape, the winding motor is controlled to drive the driving gear to rotate, so that the driven gear meshing with the driving gear drives the I-type winding drum to rotate synchronously, and the crane cable is wound until the crane cable is straightened and tightened on the surface of the guide roller, so that the guide roller pulls the sliding block to slide on the surface of the installation slide bar, squeezing the buffer spring to deform, and under the rebound action of the buffer spring, the sliding block is pushed to the central position of the surface of the installation slide bar, so that the guide roller can be pressed against the surface of the crane cable, ensuring that the crane cable is in a straight and tightened state during the winding process, and avoiding the crane cable from being loosened during the winding process.

[0015] 3. In the present invention, by arranging fixed hooks, mounting side panels, protective covers, positioning strips and rotating clamps, the protective covers are correspondingly clamped on the tops of the two groups of mounting side panels, so that the positioning strips on the inner wall of the protective cover are clamped in the corresponding positioning slots on the surfaces of the mounting side panels, until the protective cover is tightly attached to the surfaces of the mounting side panels, the positions of the rotating clamps and the fixed hooks are made corresponding, and the rotating clamps are controlled to rotate on the surface of the fixed block until the rotating clamps are tightly attached to the surface of the fixed hooks, so that the fixed hooks pass through the fixed slots on the surface of the rotating clamps and are clamped in the fixed slots, thereby clamping and fixing the protective cover on the surface of the mounting side panels, and when the crane cable is wound up and breaks on the surface of the I-type winding drum, the crane cable on the surface of the I-type winding drum is blocked by the protective cover to avoid the crane cable from breaking and rebounding and causing harm to personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the installation base plate and the fixing strip of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the cable winding mechanism and the winding motor of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the protective cover of the present invention;

[0020] Figure 5 It is a cross-sectional structural schematic diagram of the rectangular mounting bar and the cable guide mechanism of the present invention;

[0021] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0022] In the figure: 1. Installation base plate; 101. Fixing strip; 102. Fixing socket; 103. T-shaped clip strip; 104. Fixing hook; 2. Cable winding mechanism; 201. Installation side plate; 202. Positioning slot; 203. I-shaped winding drum; 204. Crane cable; 205. Driven gear; 3. Winding motor; 301. Driving gear; 4. Protective cover; 401. Positioning clip strip; 402. Fixing block; 403. Rotating clip plate; 404. Fixing Card slot; 5, rectangular mounting strip; 501, T-shaped card slot; 502, mounting block; 503, concave card slot; 504, mounting column; 505, fixing pin; 506, fixing spring; 507, lever; 6, cable guide mechanism; 601, mounting seat; 602, rectangular slot; 603, limiting slide slot; 604, mounting slide bar; 605, sliding block; 606, limiting convex strip; 607, buffer spring; 608, mounting rod; 609, guide roller. DETAILED DESCRIPTION

[0023] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0024] like Figure 1-6As shown, the present invention provides a technical solution: a crane winch safety protection device, comprising an installation base plate 1, a cable winding mechanism 2 is fixedly installed on one side of the top of the installation base plate 1, the cable winding mechanism 2 comprises two sets of installation side plates 201, and the installation side plates 201 are fixedly installed on the top of the fixing bar 101, and positioning slots 202 are symmetrically provided on both sides of the surface of the installation side plates 201, and a protective cover 4 is slidably installed on the top of the surface of the cable winding mechanism 2, and positioning strips 401 are symmetrically fixedly installed on both sides of the inner wall of the protective cover 4, and the positioning strips 401 correspond to the positions of the positioning slots 202 and have the same shape, and by providing the positioning slots 202 and the positioning strips 401, when the protective cover 4 is covered on the surfaces of the two sets of installation side plates 201, the positioning strips 401 on the inner wall of the protective cover 4 are inserted into the corresponding positioning slots 202 on both sides of the installation side plates 201, ensuring that the protective cover 4 will not be misaligned when it is covered and fixed on the surface of the installation side plates 201;

[0025] An I-type winding drum 203 is rotatably installed on the top between the two sets of mounting side plates 201, and a crane cable 204 is provided on the surface of the I-type winding drum 203. One end of the I-type winding drum 203 passes through the mounting side plates 201 and is fixedly installed with a driven gear 205. A winding motor 3 is fixedly installed on the top of the mounting bottom plate 1 on one side of the cable winding mechanism 2, and a driving gear 301 is fixedly installed on the output end of the winding motor 3, and the driving gear 301 and the driven gear 205 are meshed with each other. Because the driven gear 205 and the driving gear 301 are provided, the winding motor 3 is controlled to rotate, so that the driving gear 301 can drive the driven gear 205 to rotate synchronously, so that the I-type winding drum 203 rotates between the two sets of mounting side plates 201, thereby winding the crane cable 204 on the surface of the I-type winding drum 203.

[0026] Fixed hooks 104 are fixedly installed at positions corresponding to the fixed strips 101 on both sides of the mounting base 1, and fixed blocks 402 are fixedly installed on both sides of the outer surface of the protective cover 4, and the fixed blocks 402 correspond to the positions of the fixed hooks 104. A rotating clamping plate 403 is rotatably installed on the surface of the fixed block 402, and a fixed slot 404 is provided on the surface of the rotating clamping plate 403, and the fixed slot 404 corresponds to the shape of the fixed hook 104. By providing the fixed hook 104 and the rotating clamping plate 403, after the protective cover 4 is tightly covered on the top of the mounting side plate 201, the rotating clamping plate 403 is controlled to rotate on the surface of the fixed block 402 until the rotating clamping plate 403 is tightly attached to the surface of the fixed hook 104, so that the fixed hook 104 is clamped and fixed inside the fixed slot 404, thereby clamping and fixing the protective cover 4 on the surface of the mounting side plate 201.

[0027] The top of the installation base plate 1 is located between the two groups of fixing strips 101 and three groups of T-shaped clip strips 103 are fixedly installed thereon. The top of the installation base plate 1 is located inside the cable winding mechanism 2 and three groups of rectangular installation strips 5 are equidistantly arranged thereon. The bottom of the rectangular installation strip 5 is equidistantly arranged thereon with three groups of T-shaped card slots 501, and the T-shaped card slots 501 correspond to the positions of the T-shaped card strips 103. Due to the T-shaped card strips 103 and the T-shaped card slots 501, when the rectangular installation strip 5 is clamped between the two groups of fixing strips 101, the T-shaped card slots 501 at the bottom of the rectangular installation strip 5 are clamped on the surface of the corresponding T-shaped card strip 103, thereby clamping and limiting the rectangular installation strip 5, ensuring that the rectangular installation strip 5 is clamped on the surface of the T-shaped card strip 103 without misalignment or offset;

[0028] A mounting column 504 is fixedly installed at one end inside the mounting block 502, a fixing pin 505 is slidably installed at one end of the mounting column 504, and an end of the fixing pin 505 away from the mounting column 504 passes through the mounting block 502 and extends to the outside of the mounting block 502, a fixing bar 101 is symmetrically fixedly installed on the top of the mounting base plate 1, and a plurality of groups of fixing sockets 102 are equidistantly provided on the surface of the fixing bar 101, by providing the fixing sockets 102 and the fixing pin 505, the fixing pin 505 passes through the mounting block 502 and is inserted into the corresponding fixing sockets 102, thereby facilitating the adjustment of the rectangular mounting bar 5 to be clamped and fixed at different positions between the two groups of fixing bars 101.

[0029] The two ends of one side of the rectangular mounting strip 5 are symmetrically fixedly mounted with mounting blocks 502, and the surface of the mounting block 502 is provided with a concave slot 503. The surface of the mounting column 504 located on the side of the fixed pin 505 is provided with a fixing spring 506. Due to the fixing spring 506, the fixing pin 505 is pushed out of the mounting block 502 under the rebound effect of the fixing spring 506, so that the fixing pin 505 can be inserted into the corresponding fixing socket 102;

[0030] A lever 507 is fixedly installed on the surface of one end of the fixed pin 505 located inside the mounting block 502, and the lever 507 passes through the concave slot 503. By providing the concave slot 503, the lever 507 is controlled to be clamped at both ends of the concave slot 503, thereby clamping and fixing the fixed pin 505, ensuring that the fixed pin 505 will not slide freely inside the mounting block 502.

[0031] A cable guide mechanism 6 is fixedly installed on the top of the rectangular mounting bar 5 inside the cable winding mechanism 2. The cable guide mechanism 6 includes two sets of mounting seats 601, a rectangular groove 602 is provided inside the mounting seat 601, and limiting slide grooves 603 are symmetrically provided on both sides of the mounting seat 601, and the limiting slide grooves 603 are connected with the rectangular grooves 602. A sliding block 605 is slidably installed on the surface of the mounting slide rod 604, and limiting convex strips 606 are symmetrically fixedly installed on both sides of the sliding block 605, and the limiting convex strips 606 are slidably connected to the inside of the limiting slide groove 603. Due to the limiting slide groove 603 and the limiting convex strip 606, when the sliding block 605 slides on the surface of the mounting slide rod 604, the limiting convex strip 606 is driven to slide inside the limiting slide groove 603, thereby sliding and limiting the sliding block 605, ensuring that the sliding block 605 will not tilt or deflect during the sliding process;

[0032] A mounting slide bar 604 is fixedly installed inside the rectangular groove 602. Buffer springs 607 are symmetrically provided on the surfaces of the mounting slide bar 604 on both sides of the sliding block 605. By providing the buffer springs 607, when the sliding block 605 slides up and down on the surface of the mounting slide bar 604, the buffer springs 607 on both sides of the sliding block 605 are pushed and squeezed to deform. Under the rebound effect of the buffer springs 607, the sliding block 605 is pushed toward the central position of the mounting slide bar 604, so that the crane cable 204 can gradually stabilize when passing through the guide roller 609.

[0033] A mounting rod 608 is fixedly installed between the two groups of sliding blocks 605. A guide roller 609 is rotatably installed on the surface of the mounting rod 608 located between the two groups of sliding blocks 605. Due to the provision of the guide roller 609, when the crane cable 204 passes around the three groups of guide rollers 609, the crane cable 204 is in a straightened and taut state, thereby preventing the crane cable 204 from loosening and shaking when being wound or released.

[0034] The working principle of the present invention is:

[0035] The levers 507 on both sides of the rectangular mounting strip 5 are pushed and squeezed to be close to each other, so as to drive the fixing pin 505 to retract into the mounting block 502, and the rectangular mounting strip 5 is clamped between the two groups of fixing strips 101, so that the T-shaped card slot 501 at the bottom of the rectangular mounting strip 5 is clamped on the surface of the corresponding T-shaped card slot 103, and the rectangular mounting strip 5 is pushed to move between the two groups of fixing strips 101 until the rectangular mounting strip 5 moves to a suitable position so that the fixing pin 505 corresponds to the position of the fixing plug hole 102, and the lever 507 is rotated to release from the inside of the concave card slot 503. Under the rebound action of the fixing spring 506, the fixing pin 505 is pushed out of the mounting block 502 and inserted into the corresponding fixing plug hole 102, and then the lever 507 is rotated to clamp and fix it in the concave card slot 503, and the steps are repeated to clamp and fix the three groups of rectangular mounting strips 5 between the two groups of fixing strips 101;

[0036] After the crane cable 204 on the surface of the I-type winding drum 203 is pulled around the three sets of guide rollers 609, the protective cover 4 is covered on the surfaces of the two sets of mounting side panels 201, so that the positioning strips 401 on the inner wall of the protective cover 4 can be inserted into the corresponding positioning slots 202 on both sides of the mounting side panels 201, until the positioning strips 401 are completely inserted into the positioning slots 202, and the rotating card plate 403 is turned over and connected with the fixed hook 104, so that the protective cover 4 is clamped and fixed on the surfaces of the two sets of mounting side panels 201;

[0037] The winding motor 3 is started, and the rotation of the winding motor 3 is transmitted to the industrial winding drum 203 through the driving gear 301 and the driven gear 205, driving the industrial winding drum 203 to start rotating to wind up the crane cable 204, so that the crane cable 204 is pulled and tightened on the surface of the guide roller 609, pressing the guide roller 609, driving the sliding block 605 to slide on the surface of the corresponding installation slide bar 604, squeezing the buffer spring 607 to deform, and at the same time, the buffer spring 607 rebounds to push the sliding block 605 to the central position of the installation slide bar 604, so that the guide roller 609 is pressed against the surface of the crane cable 204, ensuring that the crane cable 204 can be in a straightened and tightened state. At the same time, when the crane cable 204 is broken, the broken crane cable 204 is blocked by the guide roller 609 and the protective cover 4 when it rebounds, preventing the broken crane cable 204 from rebounding and injuring the staff.

[0038] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

Claims

1. A crane winch safety protection device, comprising a mounting base plate (1), characterized in that: A cable winding mechanism (2) is fixedly mounted on one side of the top of the installation base plate (1); a winding motor (3) is fixedly mounted on the top of the installation base plate (1) located on one side of the cable winding mechanism (2); a protective cover (4) is slidably mounted on the top of the surface of the cable winding mechanism (2); three groups of rectangular mounting strips (5) are equidistantly mounted on the top of the installation base plate (1) located inside the cable winding mechanism (2); a cable guide mechanism (6) is fixedly mounted on the top of the rectangular mounting strips (5) located inside the cable winding mechanism (2).

2. A crane hoisting safety protection device according to claim 1, characterized in that: A fixing strip (101) is symmetrically fixedly mounted on the top of the installation base plate (1), a plurality of groups of fixing holes (102) are equidistantly arranged on the surface of the fixing strip (101), three groups of T-shaped clip strips (103) are fixedly mounted on the top of the installation base plate (1) between two groups of fixing strips (101), and fixing hooks (104) are respectively fixedly mounted at positions corresponding to the fixing strips (101) on both sides of the installation base plate (1).

3. A crane hoisting safety protection device according to claim 2, characterized in that: The cable winding mechanism (2) comprises two groups of mounting side plates (201), and the mounting side plates (201) are fixedly mounted on the top of the fixing bar (101), positioning slots (202) are symmetrically arranged on both sides of the surface of the mounting side plates (201), an I-type winding drum (203) is rotatably mounted on the top between the two groups of mounting side plates (201), a crane cable (204) is arranged on the surface of the I-type winding drum (203), and one end of the I-type winding drum (203) passes through the mounting side plates (201) and is fixedly mounted with a driven gear (205).

4. A crane hoisting safety protection device according to claim 3, characterized in that: A driving gear (301) is fixedly mounted on the output end of the winding motor (3), and the driving gear (301) and the driven gear (205) are meshed with each other.

5. A crane hoisting safety protection device according to claim 3, characterized in that: Positioning strips (401) are symmetrically fixedly installed on both sides of the inner wall of the protective cover (4), and the positions of the positioning strips (401) and the positioning slots (202) correspond to each other and have the same shape. Fixed blocks (402) are fixedly installed on both sides of the outer surface of the protective cover (4), and the positions of the fixed blocks (402) and the fixed hooks (104) correspond to each other. A rotating card plate (403) is rotatably installed on the surface of the fixed block (402), and a fixed card slot (404) is provided on the surface of the rotating card plate (403), and the fixed card slot (404) corresponds to the shape of the fixed hook (104).

6. A crane hoisting safety protection device according to claim 2, characterized in that: The bottom of the rectangular mounting strip (5) is equidistantly provided with three groups of T-shaped slots (501), and the positions of the T-shaped slots (501) and the T-shaped slots (103) correspond to each other. The two ends of one side of the rectangular mounting strip (5) are symmetrically fixedly provided with mounting blocks (502), and the surface of the mounting block (502) is provided with a concave slot (503). A mounting column (504) is fixedly provided at one end of the mounting block (502), and a mounting column (504) is slidably provided at one end. A fixed latch (505) is provided, and one end of the fixed latch (505) away from the mounting column (504) passes through the mounting block (502) and extends to the outside of the mounting block (502); a fixed spring (506) is provided on a surface of the mounting column (504) located on one side of the fixed latch (505); a lever (507) is fixedly installed on the surface of one end of the fixed latch (505) located inside the mounting block (502), and the lever (507) passes through the concave slot (503).

7. A crane hoisting safety protection device according to claim 1, characterized in that: The cable guide mechanism (6) comprises two groups of mounting seats (601), wherein a rectangular groove (602) is provided inside the mounting seat (601), and limiting sliding grooves (603) are symmetrically provided on both sides of the mounting seat (601), and the limiting sliding grooves (603) are communicated with the rectangular groove (602), and a mounting slide bar (604) is fixedly installed inside the rectangular groove (602), and a sliding block (605) is slidably installed on the surface of the mounting slide bar (604), and limiting convex strips (606) are symmetrically fixedly installed on both sides of the sliding block (605), and the limiting convex strips (606) are slidably connected to the inside of the limiting sliding groove (603), and buffer springs (607) are symmetrically provided on the surfaces of the mounting slide bar (604) located on both sides of the sliding block (605), and a mounting rod (608) is fixedly installed between the two groups of sliding blocks (605), and a guide roller (609) is rotatably installed on the surface of the mounting rod (608) located between the two groups of sliding blocks (605).

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