A positioning hook of an electric hoist bridge crane

Abstract

The present application relates to the technical field of lifting equipment, and in particular to a positioning hook of an electric hoist bridge crane, which comprises a mounting frame and a hook body arranged on the mounting frame, the hook body comprising a moving plate slidably connected to the mounting frame and a horizontal rod fixed to the moving plate, the horizontal rod and the moving plate are arranged vertically, a limiting assembly is arranged on the hook body, the limiting assembly is used to limit the position of the lifting lug in the hook body, the limiting assembly comprises a mounting shaft rotatably connected to the horizontal rod, a limiting rod fixed to the mounting shaft, and an abutting rod slidably connected to the limiting rod. The present application has the effect of being more convenient when installing the hook body.

Description

Technical Field

[0001] The present application relates to the technical field of lifting equipment, and in particular to a positioning hook of an electric hoist bridge crane. Background Art

[0002] Bridge cranes are lifting equipment that are horizontally mounted above workshops, warehouses and material yards to lift materials. They are the most widely used and most numerous lifting machinery. Both ends of the bridge crane are located on tall concrete columns or metal brackets, and its shape is like a bridge. The bridge of the bridge crane runs longitudinally along the tracks laid on the elevated platforms on both sides.

[0003] The space under the bridge can be fully utilized to lift materials without being hindered by ground equipment.

[0004] The existing hook includes a vertical portion, a horizontal portion and a bending portion, the bending portion is bent in the vertical direction, and the bending portion is used to limit the lifting ear in the horizontal portion. For example, a Chinese patent document with publication number CN116812741B discloses an intelligent anti-unhooking device for a crane hook, including a crane hook body, and a closing device for blocking the opening of the bent hook is provided at the bottom of the crane hook body. Through the setting of the connecting block, the crane hook body is passed through the square hole, and the fastener is passed through the extension part to block the position of the square hole, so that the lifting ear can be prevented from detaching from the hook body.

[0005] In the above-mentioned related technologies, during hoisting, the hook needs to be aligned with the lifting ear. Since the hook has a limiting portion bent upward, during hoisting, the staff needs to rotate the hook, then insert the limiting portion through the hook, and finally rotate the hook so that the bottom of the hook abuts against the lifting ear. When removing the hook, it is also necessary to rotate the hook so that the limiting portion is detached from the hook. This will cause great inconvenience during use and affect the hoisting efficiency. Summary of the invention

[0006] The present application provides a positioning hook for an electric hoist bridge crane, aiming to solve the problem of inconvenient use of the hook in the related art.

[0007] The positioning hook of an electric hoist bridge crane provided in the present application adopts the following technical solution:

[0008] A positioning hook of an electric hoist bridge crane comprises a mounting frame and a hook body arranged on the mounting frame, the hook body comprising a movable plate slidably connected to the mounting frame and a horizontal rod fixed to the movable plate, the horizontal rod and the movable plate are vertically arranged, a limiting assembly is arranged on the hook body, the limiting assembly is used to limit the position of a lifting ear in the hook body, the limiting assembly comprises a mounting shaft rotatably connected to the horizontal rod, a limiting rod fixed on the mounting shaft, and an abutting rod slidably connected to the limiting rod, and a pushing spring is arranged on the limiting rod, one end of the pushing spring is fixed on the abutting rod, and the other end is fixed on the limiting rod, and the pushing spring is used to push one end of the abutting rod to abut against the movable plate, and a control assembly for adjusting the position of the limiting assembly is arranged on the mounting frame.

[0009] By adopting the above technical solution, during installation, firstly, the holes on the horizontal rod and the lifting lug are aligned, and then the mounting frame is driven horizontally by the electric hoist to move, and the mounting frame drives the moving plate and the horizontal rod to move simultaneously, so that the horizontal rod is inserted into the lifting lug, and then, during installation, the hook body does not need to be rotated, and only the hook body needs to be driven horizontally by the electric hoist to achieve the effect of inserting the hook body into the lifting lug, which makes it more convenient to install the hook body. In addition, the limit assembly is arranged on the horizontal rod, and the position of the lifting lug on the horizontal rod can be limited by the limit assembly, so as to prevent the lifting lug on the horizontal rod from being separated, so as to be more stable during lifting.

[0010] Optionally, the control component includes a mounting wheel fixed on the mounting shaft, a control wheel rotatably connected to the movable plate, and a control rope fixed on the mounting wheel, one end of the control rope away from the mounting wheel is fixed on the control wheel, and the control rope is simultaneously wound around the mounting wheel and the control wheel, and a driving component for driving the limit rod to rotate is provided on the movable plate.

[0011] By adopting the above technical solution, by rotating the control wheel, the mounting wheel can be driven to rotate under the action of the control rope. When the mounting wheel rotates, the mounting shaft and the limit rod fixed on the mounting shaft can be driven to rotate, thereby achieving the purpose of facilitating the rotation of the limit rod.

[0012] Optionally, the driving assembly includes a driving shaft rotatably connected to the movable plate, a driving gear fixed on the driving shaft, and a driving rack slidably connected to the movable plate, the driving rack and the driving gear are meshed, and a return spring is arranged on the movable plate, one end of the return spring is fixed to the movable plate, and the other end is fixed to the driving rack.

[0013] By adopting the above technical solution, when the driving rack moves, it will drive the driving gear to rotate, and the rotation of the driving gear will drive the control wheel to rotate. The control wheel is fixed on the driving shaft, and when the driving shaft rotates, it can drive the control wheel to rotate. Then the control rope will be wound around the control wheel, and at the same time, the control rope wound around the mounting wheel will be detached, thereby achieving the purpose of driving the mounting wheel to rotate.

[0014] Optionally, a reset assembly is provided on the mounting wheel, and the reset assembly includes a mounting sleeve fixed on the mounting wheel and a volute spring fixed on the mounting sleeve, and the other end of the volute spring is fixed on the mounting shaft.

[0015] By adopting the above technical solution, under the action of the volute spring, the installation shaft is driven to rotate in the opposite direction, at which time the limit rod and the abutment rod are rotated to a horizontal state, so that the electric hoist drives the hook body to move horizontally, and then the horizontal rod and the limit rod are disengaged from the lifting ear, thereby achieving the purpose of facilitating the removal of the lifting ear from the horizontal rod.

[0016] Optionally, the movable plate is provided with a support assembly for supporting the position of the lifting ear on the horizontal rod, the support assembly includes a support rod slidably connected to the movable plate and a support roller rotatably connected to the support rod, and the movable plate is provided with an adjustment assembly for adjusting the position of the support roller.

[0017] By adopting the above technical scheme, the support roller is first moved toward the direction close to the lifting ear through the adjustment component. When the support roller moves into the lifting ear, the adjustment component drives the two support rollers to move away from each other at the same time. At this time, the surface of the support roller will abut against the inner wall of the lifting ear, thereby achieving the purpose of supporting the lifting ear on the workpiece. Under the action of the limit rod and the abutment rod, the movement of the workpiece in the vertical direction can be reduced and the movement of the workpiece along the length direction of the horizontal rod can also be reduced. Under the action of the support assembly, the movement of the lifting ear in the length direction vertical to the horizontal rod can be reduced.

[0018] Optionally, the adjustment component includes an adjustment plate slidably connected to the control rope, an adjustment rod slidably connected to the adjustment plate, and an adjustment frame slidably connected to the adjustment rod, the adjustment frame and the support rod are fixedly connected, the adjustment component also includes a first push plate, a second push plate and a third push plate, the first push plate is provided with a first push surface, the second push plate is provided with a second push surface, the first push surface is arranged toward the adjustment block, the second push surface is arranged toward the first push block, the adjustment frame simultaneously abuts against the first push surface and the second push surface, and the third push plate is fixed to the control rope.

[0019] By adopting the above technical solution, under the action of the first pushing surface and the second pushing surface, the support roller will first be pushed to move in the direction close to the lifting ear, and then under the action of the second pushing surface, the two support rollers will be pushed away from each other and then abut against the inner wall of the lifting ear, thereby realizing the support positioning of the lifting ear and the workpiece.

[0020] Optionally, a limit spring is sleeved on the adjusting rod, one end of the limit spring is fixed on the adjusting rod, and the other end is fixed on the adjusting frame; an adjusting spring is arranged on the adjusting plate, one end of the adjusting spring is fixed on the moving plate, and the other end is fixed on the adjusting rod.

[0021] By adopting the above technical solution, when the first pushing surface pushes the adjustment frame to move away from the second pushing plate, the adjustment spring is in a stretched state, and then when the second pushing surface pushes the adjustment frame to move away from the adjustment plate, the limit spring is in a compressed state, and finally when the horizontal rod rotates from an inclined state to a horizontal state, the third pushing plate moves in the opposite direction, and then the adjustment plate and the adjustment frame arranged on the adjustment plate move in the opposite direction under the action of gravity, at this time, under the action of the limit spring and the adjustment spring, the support roller can be reset, and then it is convenient to support and limit other lifting ears subsequently.

[0022] Optionally, the mounting frame is provided with a fixing component for fixing the position of the drive shaft, the fixing component includes a fixing block fixed on the drive shaft and a fixing plate fixed on the mounting frame, the fixing plate is provided with a sliding groove and a fixing groove for clamping the fixing block, the sliding groove is vertically arranged, and the fixing groove and the sliding groove are connected.

[0023] By adopting the above technical solution, when the limit rod is in a horizontal state, the fixed block is in the sliding groove, and the drive shaft can rotate in the sliding groove. When the limit rod is in an inclined state and the drive rack and the mounting block are no longer abutted, the fixed block is in the fixed groove, and the position of the drive shaft is fixed, and then the drive shaft cannot rotate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] There is no need to rotate the hook body during installation. The hook body can be inserted into the lifting ear by only moving it horizontally via the electric hoist, which makes it more convenient to install the hook body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of the movable plate of an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged view of point B in the middle.

[0029] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0030] Figure 5 It is a schematic diagram of the structure of the drive component of an embodiment of the present application.

[0031] Figure numerals: 01, mounting frame; 02, reset spring; 03, lifting ear; 1, hook body; 11, moving plate; 12, horizontal rod; 2, limit assembly; 21, mounting shaft; 22, limit rod; 23, abutment rod; 24, push spring; 3, control assembly; 31, mounting wheel; 32, control wheel; 33, control rope; 4, driving assembly; 41, driving shaft; 42, driving gear; 43, driving rack; 5, reset assembly; 51, mounting Sleeve; 52, scroll spring; 6, support assembly; 61, support rod; 62, support roller; 7, adjustment assembly; 71, adjustment plate; 72, adjustment rod; 73, adjustment frame; 74, first push plate; 75, second push plate; 76, third push plate; 8, first push surface; 81, second push surface; 82, limit spring; 83, adjustment spring; 9, fixing assembly; 91, fixing block; 92, fixing groove; 93, sliding groove; 94, fixing plate. DETAILED DESCRIPTION

[0032] The following combination Figure 1-Figure 5 This application is described in further detail.

[0033] The embodiment of the present application discloses a positioning hook of an electric hoist bridge crane. Figure 1 A positioning hook of an electric hoist bridge crane includes a mounting frame 01 and a hook body 1 arranged on the mounting frame 01, the mounting frame 01 is connected to a wire rope, a limiting component 2 is arranged on the hook body 1, the limiting component 2 is used to limit the position of a lifting ear 03 in the hook body 1, and a control component 3 is arranged on the mounting frame 01, the control component 3 is used to adjust the position of the limiting component 2.

[0034] The hook body 1 includes a moving plate 11 slidably connected to the mounting frame 01 and a horizontal rod 12 fixed on the moving plate 11. The horizontal rod 12 and the moving plate 11 are arranged vertically. The moving plate 11 slides on the mounting frame 01 in the vertical direction. When installing, firstly, the horizontal rod 12 and the hole on the lifting ear 03 are made to correspond, and then the mounting frame 01 is driven horizontally by the electric hoist to move. The mounting frame 01 drives the moving plate 11 and the horizontal rod 12 to move at the same time, so that the horizontal rod 12 is inserted into the lifting ear 03. Then, when installing, there is no need to rotate the hook body 1. It is only necessary to drive the hook body 1 to move horizontally by the electric hoist to achieve the effect of inserting the hook body 1 into the lifting ear 03, so that it is more convenient to install the hook body 1. In addition, the limit assembly 2 is arranged on the horizontal rod 12. The limit assembly 2 can limit the position of the lifting ear 03 on the horizontal rod 12, and the lifting ear 03 on the horizontal rod 12 can be prevented from being separated, so that it is more stable when lifting.

[0035] The limiting assembly 2 includes a mounting shaft 21 rotatably connected to the horizontal rod 12, a limiting rod 22 fixed on the mounting shaft 21, and an abutting rod 23 slidably connected to the limiting rod 22. At the same time, a pushing spring 24 is arranged on the limiting rod 22. One end of the pushing spring 24 is fixed on the abutting rod 23, and the other end is fixed on the limiting rod 22. The pushing spring 24 is used to push one end of the abutting rod 23 to abut on the movable plate 11. When the abutting rod 23 abuts on the movable plate 11, the abutting rod 23, the horizontal rod 12 and the movable plate 11 form a triangle, and the lifting ear 03 is in the triangle. At the same time, the side surface of the abutting rod 23 abuts on the end face of the lifting ear 03, thereby limiting the position of the lifting ear 03, thereby reducing the shaking of the workpiece during lifting.

[0036] The control component 3 on the movable plate 11 is used to drive the installation shaft 21 to rotate, so that the end of the abutment rod 23 on the limit rod 22 abuts on the movable plate 11. In this embodiment, in the initial state, the limit rod 22 is in a horizontal state and is on the same horizontal plane as the horizontal rod 12. Then, when the electric hoist drives the hook body 1 to move horizontally, the abutment rod 23 and the limit rod 22 can first pass through the lifting ear 03, thereby achieving the purpose of facilitating the lifting ear 03 to be on the horizontal rod 12.

[0037] The control assembly 3 includes a mounting wheel 31 fixed on the mounting shaft 21, a control wheel 32 rotatably connected to the moving plate 11, and a control rope 33 fixed on the mounting wheel 31. The end of the control rope 33 away from the mounting wheel 31 is fixed on the control wheel 32, and the control rope 33 is wound around the mounting wheel 31 and the control wheel 32 at the same time. By rotating the control wheel 32, the mounting wheel 31 can be driven to rotate under the action of the control rope 33. When the mounting wheel 31 rotates, the mounting shaft 21 and the limit rod 22 fixed on the mounting shaft 21 can be driven to rotate, thereby achieving the purpose of facilitating the rotation of the limit rod 22. A driving assembly 4 is provided on the moving plate 11. The driving assembly 4 is used to drive the limit rod 22 to rotate, so that the limit rod 22 rotates from a horizontal state to an inclined state, and then the position of the ear 03 on the horizontal rod 12 is limited.

[0038] The driving assembly 4 includes a driving shaft 41 rotatably connected to the moving plate 11, a driving gear 42 fixed on the driving shaft 41, and a driving rack 43 slidably connected to the moving plate 11. The driving rack 43 is meshed with the driving gear 42. When the driving rack 43 moves, it will drive the driving gear 42 to rotate. The rotation of the driving gear 42 will drive the control wheel 32 to rotate. In this embodiment, the control wheel 32 is fixed on the driving shaft 41. When the driving shaft 41 rotates, it can drive the control wheel 32 to rotate, and then the control rope will be wound around the control wheel 32. At the same time, the control rope 33 wound around the mounting wheel 31 will be detached, thereby achieving the purpose of driving the mounting wheel 31 to rotate.

[0039] A reset assembly 5 is provided on the mounting wheel 31, and the reset assembly 5 comprises a mounting sleeve 51 fixed on the mounting wheel 31 and a volute spring 52 fixed on the mounting sleeve 51, and the other end of the volute spring 52 is fixed on the mounting shaft 21. Then, when the limit rod 22 is in a horizontal state, the volute spring 52 is in a normal state, and then when the limit rod 22 is in an inclined state, the volute spring 52 is in an energized state. When it is necessary to remove the lifting ear 03 from the horizontal rod 12, it is necessary to drive the rack 43 to drive the driving gear 42 to rotate in the opposite direction. During the reverse rotation process, the control rope 33 will be rewound on the mounting wheel 31, and then the control rope 33 on the control wheel 32 will also disengage. Under the action of the volute spring 52, the mounting shaft 21 is driven to rotate in the opposite direction, and at this time, the limit rod 22 and the abutment rod 23 are rotated to a horizontal state, so that the electric hoist drives the hook body 1 to move horizontally, and then the horizontal rod 12 and the limit rod 22 are disengaged from the lifting ear 03, thereby achieving the purpose of facilitating the removal of the lifting ear 03 from the horizontal rod 12.

[0040] A return spring 02 is provided on the movable plate 11, one end of the return spring 02 is fixed on the movable plate 11, and the other end is fixed on the driving rack 43. In this embodiment, a mounting block is provided on the mounting frame 01. After the horizontal part abuts against the surface of the workpiece, the counterweight block drives the mounting frame 01 to continue to descend, and then the mounting block will move in the direction close to the driving rack 43 under the action of gravity, and then push the driving rack 43 to move. In the process of moving the driving rack 43, the return spring 02 will be compressed, and at this time, the inclined limit rod 22 will be driven to rotate to a horizontal state, and finally the horizontal part will be inserted into the lifting ear 03. Then, in the process of lifting, the mounting block will be pulled up first, and in the process of rising, the counterweight block will gradually move away from the driving rack 43, and then under the action of the return spring 02, the driving rack 43 will move in the opposite direction. In the process of moving, the horizontal limit rod 22 will be rotated to a tilted state to limit the lifting ear 03. In this embodiment, the elastic force of the return spring 02 is greater than the elastic force of the spiral spring 52 , and the gravity of the counterweight is greater than the elastic force of the return spring 02 .

[0041] A support assembly 6 is provided on the movable plate 11, and the support assembly 6 is used to support the position of the lifting ear 03 on the horizontal rod 12, so as to prevent the lifting ear 03 from sliding in the horizontal direction perpendicular to the horizontal rod 12, and then the problem of the workpiece shaking on the hook body 1 will occur during lifting.

[0042] The supporting assembly 6 includes a supporting rod 61 slidably connected to the movable plate 11 and a supporting roller 62 rotatably connected to the supporting rod 61. At the same time, an adjusting assembly 7 is arranged on the movable plate 11. The adjusting assembly 7 is used to adjust the position of the supporting roller 62. Two supporting assemblies 6 are arranged. The supporting roller 62 is first moved in the direction close to the lifting ear 03 through the adjusting assembly 7. When the supporting roller 62 moves into the lifting ear 03, the adjusting assembly 7 drives the two supporting rollers 62 to move away from each other at the same time. At this time, the surface of the supporting roller 62 will abut against the inner wall of the lifting ear 03, so as to achieve the purpose of supporting the lifting ear 03 on the workpiece. Under the action of the limiting rod 22 and the abutting rod 23, the movement of the workpiece in the vertical direction can be reduced, and the movement of the workpiece in the length direction of the horizontal rod 12 can also be reduced. Under the action of the supporting assembly 6, the movement of the lifting ear 03 in the length direction perpendicular to the horizontal rod 12 can be reduced. Then, during the lifting process, the workpiece lifting can be made more stable, and the friction between the horizontal rod 12 and the lifting ear 03 can be reduced.

[0043] The adjusting assembly 7 includes an adjusting plate 71 slidably connected to the control rope 33, an adjusting rod 72 slidably connected to the adjusting plate 71, and an adjusting frame 73 slidably connected to the adjusting rod 72. The adjusting frame 73 is fixedly connected to the support rod 61. In this embodiment, the sliding direction of the adjusting rod 72 and the sliding direction of the adjusting frame 73 are arranged perpendicularly, and the adjusting rod 72 slides along the length direction of the adjusting plate 71. The adjusting assembly 7 also includes a first pushing plate 74, a second pushing plate 75 and a third pushing plate 76. The first pushing plate 74 is provided with a first pushing surface 8, and the second pushing plate 75 is provided with a second pushing surface 81. The first pushing surface 8 is arranged toward the adjusting frame 73, and the second pushing surface 81 is arranged toward the adjusting frame 73. The surface 81 is set toward the first push plate 74, and the adjustment frame 73 abuts against the first push surface 8 and the second push surface 81 at the same time. The third push plate 76 is fixed on the control rope 33. During the rising process of the mounting block, the third push plate 76 will gradually contact the bottom surface of the adjustment plate 71, and then push the adjustment plate 71 to rise. During the rising process of the adjustment plate 71, under the action of the first push surface 8 and the second push surface 81, the support roller 62 will be pushed to move toward the direction close to the lifting ear 03 first, and then under the action of the second push surface 81, the two support rollers 62 will be pushed away from each other, and then abut against the inner wall of the lifting ear 03, so as to realize the support positioning of the lifting ear 03 and the workpiece.

[0044] When the locking cam 73 is in the locked state, the locking cam 73 is in a locked state, and the locking cam 73 is in a locked state when the locking cam 73 is in a locked state. In this embodiment, the end of the abutting rod 23 is configured to be made of elastic rubber material, and then when supporting the ears 03 of different diameters, the end of the abutting rod 23 will be deformed to different degrees.

[0045] A fixing assembly 9 is provided on the mounting frame 01, and the fixing assembly 9 is used to fix the position of the driving shaft 41, so as to prevent the driving shaft 41 from rotating when the workpiece is driven to rise. The fixing assembly 9 includes a fixing block 91 fixed on the driving shaft 41 and a fixing plate 94 fixed on the mounting frame 01. The fixing plate 94 is provided with a sliding groove 93 and a fixing groove 92 for clamping the fixing block 91. The sliding groove 93 is vertically arranged, and the fixing groove 92 is connected to the sliding groove 93. When the limiting rod 22 is in a horizontal state, the fixing block 91 is in the sliding groove 93, and the driving shaft 41 can rotate in the sliding groove 93. When the limiting rod 22 is in an inclined state and the driving rack 43 and the mounting block are no longer abutted, the fixing block 91 is in the fixing groove 92, and the position of the driving shaft 41 is fixed, and then the driving shaft 41 cannot rotate.

[0046] The implementation principle of the positioning hook of an electric hoist bridge crane in the embodiment of the present application is as follows: when it is necessary to hoist a workpiece, first adjust the position of the hook body 1 so that the horizontal rod 12 abuts against the surface of the workpiece and corresponds to the lifting ear 03, then the mounting block continues to descend, and under the action of gravity, drives the driving rack 43 to move, and drives the driving gear 42 to rotate during the movement, and drives the mounting wheel 31 to rotate under the action of the control rope 33, so that the inclined limiting rod 22 rotates to a horizontal state, and then drives the horizontal rod 12 and the moving plate 11 to move through the electric hoist, so that the horizontal rod 12 is inserted into the lifting ear 03, and finally the electric hoist drives the mounting block 31 to rotate. The mounting block rises, and the driving rack 43 is driven to move in the opposite direction under the action of the reset spring 02, and then the control rope 33 is moved in the opposite direction, and at the same time, the limiting rod 22 is driven to rotate to an inclined state. During the movement of the control rope 33, the third push plate 76 is driven to move, and the third push plate 76 pushes the adjustment plate 71 to move during the movement. Then, under the action of the first push surface 8 and the second push surface 81, the support roller 62 can be moved to support the lifting ear 03, and then the stability of the workpiece during lifting can be improved, while the friction between the lifting ear 03 and the horizontal part can be reduced, thereby increasing the service life of the hook body 1.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning hook of an electric hoist bridge crane, comprising a mounting frame (01) and a hook body (1) arranged on the mounting frame (01), characterized in that: The hook body (1) comprises a movable plate (11) slidably connected to the mounting frame (01) and a horizontal rod (12) fixed to the movable plate (11), wherein the horizontal rod (12) and the movable plate (11) are arranged vertically, and a limit assembly (2) is arranged on the hook body (1), wherein the limit assembly (2) is used to limit the position of the lifting ear (03) in the hook body (1), and the limit assembly (2) comprises a mounting shaft (21) rotatably connected to the horizontal rod (12), a limit rod (22) fixed to the mounting shaft (21), and a limit rod (22) slidably connected to the limit rod. The limiting rod (22) is provided with a push spring (24), one end of the push spring (24) is fixed on the push rod (23), and the other end is fixed on the limiting rod (22), and the push spring (24) is used to push one end of the push rod (23) to abut against the movable plate (11), and the mounting frame (01) is provided with a control component (3) for adjusting the position of the limiting component (2); the control component (3) comprises a mounting wheel (31) fixed on the mounting shaft (21), a wheel (31) rotatably connected to the movable plate (11), and a wheel (32) mounted on the movable plate (11). A control wheel (32) and a control rope (33) fixed on the mounting wheel (31), wherein one end of the control rope (33) away from the mounting wheel (31) is fixed on the control wheel (32), and the control rope (33) is wound around the mounting wheel (31) and the control wheel (32) at the same time, and the movable plate (11) is provided with a driving assembly (4) for driving the limit rod (22) to rotate; the driving assembly (4) comprises a driving shaft (41) rotatably connected to the movable plate (11), a driving gear (42) fixed on the driving shaft (41), and a driving gear (42) slidably connected to the movable plate (11). The driving rack (43) is meshed with the driving gear (42); a return spring (02) is provided on the moving plate (11); one end of the return spring (02) is fixed to the moving plate (11), and the other end is fixed to the driving rack (43); a return assembly (5) is provided on the mounting wheel (31); the return assembly (5) comprises a mounting sleeve (51) fixed to the mounting wheel (31) and a scroll spring (52) fixed to the mounting sleeve (51); the other end of the scroll spring (52) is fixed to the mounting shaft (21).

2. The positioning hook of an electric hoist bridge crane according to claim 1, characterized in that: The movable plate (11) is provided with a support assembly (6) for supporting the position of the lifting lug (03) on the horizontal rod (12); the support assembly (6) comprises a support rod (61) slidably connected to the movable plate (11) and a support roller (62) rotatably connected to the support rod (61); and the movable plate (11) is provided with an adjustment assembly (7) for adjusting the position of the support roller (62).

3. The positioning hook of an electric hoist bridge crane according to claim 2, characterized in that: The adjustment assembly (7) comprises an adjustment plate (71) slidably connected to the control rope (33), an adjustment rod (72) slidably connected to the adjustment plate (71) and an adjustment frame (73) slidably connected to the adjustment rod (72); the adjustment frame (73) is fixedly connected to the support rod (61); the adjustment assembly (7) further comprises a first push plate (74), a second push plate (75) and a third push plate (76); the first push plate (74) is provided with a first push surface (8); the second push plate (75) is provided with a second push surface (81); the first push surface (8) is arranged toward the adjustment frame (73); the second push surface (81) is arranged toward the first push plate (74); the adjustment frame (73) abuts against the first push surface (8) and the second push surface (81) at the same time; and the third push plate (76) is fixed to the control rope (33).

4. The positioning hook of an electric hoist bridge crane according to claim 3, characterized in that: The adjusting rod (72) is sleeved with a limit spring (82), one end of the limit spring (82) is fixed to the adjusting rod (72), and the other end is fixed to the adjusting frame (73); the adjusting plate (71) is provided with an adjusting spring (83), one end of the adjusting spring (83) is fixed to the moving plate (11), and the other end is fixed to the adjusting rod (72).

5. The positioning hook of an electric hoist bridge crane according to claim 4, characterized in that: The mounting frame (01) is provided with a fixing assembly (9) for fixing the position of the drive shaft (41), the fixing assembly (9) comprising a fixing block (91) fixed on the drive shaft (41) and a fixing plate (94) fixed on the mounting frame (01), the fixing plate (94) being provided with a sliding groove (93) and a fixing groove (92) for clamping the fixing block (91), the sliding groove (93) being arranged vertically, and the fixing groove (92) and the sliding groove (93) being communicated with each other.

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