Crane stop device

Abstract

The present invention relates to the field of crane stoppers, and discloses a crane stopper device, comprising two stopper plates, the two stopper plates are respectively located on both sides of a truss, a mounting groove is provided on the side of the stopper plate close to the truss, a pad is slidably connected in the mounting groove, the pad is fixedly installed with the truss, a buffer groove is provided on the stopper plate, a buffer pad is installed in the buffer groove; a mounting mechanism is used to install the two stopper plates on the truss, the mounting mechanism comprises a U-shaped plate, two clamping plates are provided in the U-shaped plate, a clamping groove matching the clamping plates is provided on the stopper plate, the two clamping plates are fixedly connected to the opposite sides with a first threaded rod, the ends of the two first threaded rods away from the clamping plates are slidably penetrated through the U-shaped plate, and the two first threaded rods are threadedly sleeved with threaded sleeves on the outside. When the present invention stops the truss trolley, an alarm can be given, and through multiple buffering, the impact force of the truss trolley on the stopper is reduced, the service life of the stopper is increased, and the safety of the use of the truss trolley is improved.

Description

Technical Field

[0001] The invention relates to the field of crane stoppers, in particular to a crane stopper device. Background Art

[0002] A crane refers to a multi-action lifting machinery that can lift weights vertically and carry heavy objects horizontally within a certain range. Some lifting equipment has the working characteristic of intermittent movement, that is, the corresponding mechanisms of material picking, transportation, unloading and other actions work alternately in one working cycle. Cranes are developing and being used more and more widely in the market. Due to the frequent accidents caused by lifting and traveling with loads without outriggers, the traveling speed is also faster than that of crawler cranes. They have stable operation, large lifting capacity, and can travel with loads within a specific range, but the road must be flat and solid, the tire pressure meets the requirements, and the lifting height must not exceed 50cm from the ground. It is prohibited to travel long distances with loads. In order to ensure the safety of the operation, it is basically prohibited to carry out lifting operations without outriggers in China. The types of wire ropes used in conjunction with cranes include phosphate-coated wire ropes, galvanized wire ropes and smooth wire ropes.

[0003] During the operation of the truss trolley, when it is about to reach the extreme position of the truss, it can be stopped by a stopper to prevent it from rushing out of the truss. However, the current stopper cannot buffer the truss trolley in advance. When the truss trolley hits the stopper, the impact force is large. Over time, the stopper will be damaged. On the other hand, when the truss trolley is still driven by the motor to move at the extreme position of the truss due to operational errors of the staff, the truss trolley will still maintain a large forward thrust when it hits the stopper, and the stopper will be subjected to a large force, which can easily cause the truss trolley to slide out of the truss, which is very dangerous.

[0004] Therefore, based on the above problems, we invented a crane stop device. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a crane stop device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a crane stop device, comprising:

[0007] Two stop plates, the two stop plates are respectively located on both sides of the truss, a mounting groove is provided on the side of the stop plate close to the truss, a pad is slidably connected in the mounting groove, the pad is fixedly installed with the truss, a buffer groove is provided on the stop plate, and a buffer pad is installed in the buffer groove;

[0008] The mounting mechanism is used to mount the two stop plates on the truss, the mounting mechanism comprising a U-shaped plate, two clamping plates are arranged inside the U-shaped plate, a card slot matching the clamping plates is arranged on the stop plate, a first threaded rod is fixedly connected to the opposite sides of the two clamping plates, one end of the two first threaded rods away from the clamping plates slides through the U-shaped plate, a threaded sleeve is threadedly sleeved on the outside of the two first threaded rods, the two threaded sleeves are rotatably connected to the U-shaped plate, a rotating shaft is rotatably penetrated through the U-shaped plate, the rotating shaft and the two first threaded rods are connected by a gear set, and one end of the rotating shaft is coaxially fixedly connected to a rotating handle;

[0009] A sliding mechanism is used to prevent the truss trolley from rushing out of the truss, the sliding mechanism includes an L-shaped plate fixedly connected to one end of the truss, two second threaded rods are rotatably connected to the L-shaped plate, and the two second threaded rods are transmission-connected through a transmission mechanism, wedge-shaped plates are slidably connected to both sides of the truss, and the two second threaded rods are respectively threadedly connected to the two wedge-shaped plates, and a motor is fixedly connected to the side wall of the L-shaped plate, and the drive shaft of the motor rotates through the L-shaped plate and is coaxially fixedly connected to one of the second threaded rods;

[0010] A pre-buffer mechanism is used to pre-buffer the truss trolley, the pre-buffer mechanism includes two buffer telescopic rods, the outer sleeve of the buffer telescopic rods is provided with a spring, the opposite sides of the two stop plates are fixedly connected with a buffer plate, the stop plate is provided with a contact plate outside, the contact plate is embedded with a distance sensor, and the two ends of the buffer telescopic rod and the spring are respectively fixedly connected with the two buffer plates and the contact plate;

[0011] A secondary buffer mechanism is used to buffer the two stop plates. The secondary buffer mechanism includes a return plate, a limit rod is fixedly connected inside the return plate, and two sliding blocks are provided on the outer sliding sleeve of the limit rod. The two sliding blocks are both slidably connected to the inner wall of the return plate, and two buffer springs are provided on the outer sleeve of the limit rod. The two ends of the two buffer springs are respectively fixedly connected to the slider and the inner wall of the return plate, and the side walls of the two sliders are rotatably connected with deflection plates, and the ends of the two deflection plates away from the slider are respectively rotatably connected to the two stop plates.

[0012] Furthermore, a card block is provided on one side of the clamping plate, and a slot matching the card block is provided in the card slot.

[0013] Furthermore, the gear set includes a first gear and a second gear meshing with each other, the first gear is coaxially fixedly connected to the rotating shaft, the second gear is coaxially fixedly connected to the threaded sleeve, and the U-shaped plate is provided with a limiting mechanism for limiting the first gear.

[0014] Furthermore, the limiting mechanism includes a fixing plate fixedly connected to the outer wall of the U-shaped plate, a limiting plate is provided on one side of the fixing plate, the limiting plate and the fixing plate are fixedly connected by a telescopic rod, the limiting plate is slidably connected to the U-shaped plate, and the limiting plate is provided with teeth matching the first gear.

[0015] Furthermore, the transmission mechanism includes two pulleys, the two pulleys are coaxially fixedly connected to the two second threaded rods respectively, and the two pulleys are connected through a synchronous belt transmission.

[0016] Furthermore, a smooth inclined surface is provided at one end of the wedge-shaped plate away from the L-shaped plate, the inclined surface faces upward, and a baffle is fixedly installed on the upper side of the inclined surface.

[0017] Furthermore, the two deflection plates are cross-arranged.

[0018] Furthermore, a contact sensor is embedded on the inclined surface of the wedge plate.

[0019] Compared with the prior art, the present invention provides a crane stop device, which has the following beneficial effects:

[0020] 1. A crane stop device is provided with an installation mechanism. Two stop plates are placed on the truss, and then the U-shaped plate is clamped in two slots. The rotating shaft is driven to rotate by the turning handle, and the rotating shaft drives the two threaded sleeves to rotate. The two threaded sleeves drive the two first threaded rods to move relative to each other, and the two first threaded rods drive the two clamping plates to move relative to each other, so that the clamping blocks on the clamping plates are clamped in the slots, and then the first gear is limited by the teeth, so that the installation of the stop plate can be completed, and the installation of the stop plate is relatively convenient.

[0021] 2. A crane stop device is provided with a slipping mechanism. When the truss trolley hits the buffer pad, the buffer pad buffers the truss trolley. If the truss trolley is not misoperated, the truss trolley can be stopped by the buffer pad. If the truss trolley is misoperated, the buffer pad cannot stop the truss trolley, and the truss trolley continues to travel until the wheel axle on the truss trolley wheel contacts the contact sensor on the wedge plate. At this time, the two second threaded rods are driven by the motor to rotate, and the second threaded rods drive the wedge plate to move in the opposite direction of the movement of the truss trolley. The wedge plate can lift the wheels of the truss trolley under the power and inertia of the truss trolley, causing the truss trolley to slip, thereby preventing the truss trolley from rushing out of the truss, thereby achieving the effect of stopping the truss trolley. On the one hand, it can avoid the stopper from causing a large impact force, and on the other hand, it can avoid the truss trolley from rushing out of the truss, thereby improving the safety of the truss trolley.

[0022] 3. A crane stop device is provided with a pre-buffer mechanism and a secondary buffer mechanism. When the truss trolley approaches the stopper, the distance between the truss trolley and the stopper is detected by the distance sensor on the contact plate, and the staff is warned. When the truss trolley collides with the contact plate, the truss trolley is pre-buffered by the buffer telescopic rod and the spring. When the impact force of the truss trolley is large, the truss trolley contacts and collides with the buffer pad. At this time, the truss trolley pushes the two stop plates to move, and the stopper is buffered by the deflection plate and the buffer spring, thereby realizing secondary buffering of the truss trolley. On the one hand, the distance of the truss trolley can be detected and a warning can be given. On the other hand, the secondary buffering reduces the impact force of the truss trolley on the stopper, reduces the pressure on the stopper, and increases its service life.

[0023] When the truss trolley is stopped by the present invention, a warning can be given, and the impact force of the truss trolley on the stopper is reduced through multiple buffering, the service life of the stopper is increased, and the safety of the use of the truss trolley is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of a three-dimensional structure of the present invention;

[0025] FIG2 is a bottom view of the structure of the present invention;

[0026] FIG3 is a schematic diagram of a top view of the structure of the present invention;

[0027] FIG4 is a schematic diagram of the structure of the installation mechanism of the present invention;

[0028] FIG5 is a schematic structural diagram of a secondary buffer mechanism in the present invention;

[0029] FIG6 is a schematic structural diagram of a stop baffle of the present invention;

[0030] FIG. 7 is a schematic diagram of the structure of the splint in the present invention.

[0031] In the figure: 1, stop plate; 2, contact sensor; 3, mounting groove; 4, pad; 5, buffer groove; 6, buffer pad; 7, mounting mechanism; 8, U-shaped plate; 9, clamping plate; 10, first threaded rod; 11, threaded sleeve; 12, rotating shaft; 13, gear set; 14, rotating handle; 15, sliding mechanism; 16, L-shaped plate; 17, second threaded rod; 18, transmission mechanism; 19, wedge plate; 20, motor; 21, pre-buffer mechanism; 22. Buffer telescopic rod; 23. Spring; 24. Buffer plate; 25. Contact plate; 26. Secondary buffer mechanism; 27. Return plate; 28. Limit rod; 29. ​​Slider; 30. Deflection plate; 31. Buffer spring; 32. Block; 33. First gear; 34. Second gear; 35. Limit mechanism; 36. Fixed plate; 37. Limit plate; 38. Teeth; 39. Pulley; 40. Baffle; 41. Telescopic rod; 42. Slot. DETAILED DESCRIPTION

[0032] 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.

[0033] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a crane stop device.

[0034] As shown in FIG1-7, a crane stop device includes a truss and a truss trolley running on the truss:

[0035] Two stopper plates 1, the two stopper plates 1 are respectively located on both sides of the truss, a mounting groove 3 is provided on the side of the stopper plate 1 close to the truss, a pad 4 is slidably connected in the mounting groove 3, the pad 4 is fixedly installed with the truss, a buffer groove 5 is provided on the stopper plate 1, and a buffer pad 6 is installed in the buffer groove 5;

[0036] In order to install the stop plate 1, an installation mechanism 7 is set up for installing the two stop plates 1 on the truss. The installation mechanism 7 includes a U-shaped plate 8, two clamping plates 9 are arranged inside the U-shaped plate 8, and a card slot 42 matching the clamping plate 9 is provided on the stop plate 1. It is worth mentioning that a clamping block 32 is provided on one side of the clamping plate 9, and a slot matching the clamping block 32 is provided in the clamping slot 42. The two clamping plates 9 are fixedly connected with a first threaded rod 10 on the opposite sides. The ends of the two first threaded rods 10 away from the clamping plates 9 are slidably penetrated through the U-shaped plate 8. The two first threaded rods 10 are threadedly sleeved with a threaded sleeve 11 on the outside. The two threaded sleeves 11 are rotatably connected to the U-shaped plate 8. The U-shaped plate 8 is rotatably penetrated with a rotating shaft 12, and the rotating shaft 12 is connected to the two first threaded rods 10. The threaded rods 10 are connected through a gear set 13. Further, the gear set 13 includes a first gear 33 and a second gear 34 that mesh with each other. The first gear 33 is coaxially fixedly connected to the rotating shaft 12, and the second gear 34 is coaxially fixedly connected to the threaded sleeve 11. A limiting mechanism 35 for limiting the first gear 33 is provided on the U-shaped plate 8. Further, the limiting mechanism 35 includes a fixed plate 36 fixedly connected to the outer wall of the U-shaped plate 8, and a limiting plate 37 is provided on one side of the fixed plate 36. The limiting plate 37 is fixedly connected to the fixed plate 36 through a telescopic rod 41. The limiting plate 37 is slidably connected to the U-shaped plate 8. The limiting plate 37 is provided with teeth 38 that match the first gear 33. One end of the rotating shaft 12 is coaxially fixedly connected to the rotating handle 14.

[0037] Through the above-mentioned technical features, when installing the stopper, the two stop plates 1 are placed on the truss, and then the U-shaped plate 8 is clamped in the two slots 42, and the rotating shaft 12 is driven to rotate by the turning handle 14, and the rotating shaft 12 drives the two threaded sleeves 11 to rotate, and the two threaded sleeves 11 drive the two first threaded rods 10 to move relative to each other, and the two first threaded rods 10 drive the two clamps 9 to move relative to each other, so that the clamping block 32 on the clamp 9 is clamped in the slot, and then the first gear 33 is limited by the teeth 38, and the installation of the stop plate 1 can be completed, thereby completing the installation of the stopper.

[0038] In order to prevent the truss trolley from rushing out of the truss, a sliding mechanism 15 is provided to prevent the truss trolley from rushing out of the truss. The sliding mechanism 15 includes an L-shaped plate 16 fixedly connected to one end of the truss. Two second threaded rods 17 are rotatably connected to the L-shaped plate 16. The two second threaded rods 17 are connected by a transmission mechanism 18. It should be noted that the transmission mechanism 18 includes two pulleys 39. The two pulleys 39 are coaxially fixedly connected to the two second threaded rods 17, respectively. The two pulleys 39 are connected by a synchronous belt transmission. Both sides of the truss are slidably connected with a wedge plate 19. It should be noted that a smooth inclined surface is provided at one end of the wedge plate 19 away from the L-shaped plate 16, and the inclined surface faces upward. It should be noted that a contact sensor 2 is embedded on the inclined surface of the wedge plate 19, and a baffle 40 is fixedly installed on the upper side of the inclined surface. Two second threaded rods 17 are respectively threadedly connected to the two wedge plates 19, and a motor 20 is fixedly connected to the side wall of the L-shaped plate 16. The drive shaft of the motor 20 rotates through the L-shaped plate 16 and is coaxially fixedly connected to one of the second threaded rods 17.

[0039] The wedge plate 19 can lift the wheels of the truss trolley under the action of the power and inertia of the truss trolley, so that the truss trolley will slip, thereby preventing the truss trolley from continuing to move, thereby preventing the truss trolley from rushing out of the truss, and achieving the effect of stopping the truss trolley.

[0040] In order to reduce the impact of the truss trolley on the stopper, a pre-buffer mechanism 21 is provided for pre-buffering the truss trolley. The pre-buffer mechanism 21 includes two buffer telescopic rods 22, and the buffer telescopic rods 22 are provided with springs 23 on their outer sleeves. The two opposite sides of the two stopper plates 1 are fixedly connected with buffer plates 24. The stopper plates 1 are provided with contact plates 25 on their outer sleeves, and the contact plates 25 are embedded with distance sensors. It should be noted that the distance sensor is electrically connected to the central control of the crane, and the two ends of the buffer telescopic rods 22 and the springs 23 are fixedly connected to the two buffer plates 24 and the contact plates 25 respectively.

[0041] Through the above technical features, when the truss trolley approaches the stopper, the distance between the truss trolley and the stopper is detected by the distance sensor on the contact plate 25 to warn the staff; when the truss trolley collides with the contact plate 25, the truss trolley is pre-buffered by the buffer telescopic rod 22 and the spring 23 to reduce the impact force during the movement of the truss trolley.

[0042] In order to prevent the truss trolley from continuing to move, a secondary buffer mechanism 26 is set up to buffer the two stop plates 1. The secondary buffer mechanism 26 includes a return plate 27, a limit rod 28 is fixedly connected inside the return plate 27, and two sliders 29 are slidably sleeved outside the limit rod 28. The two sliders 29 are both slidably connected to the inner wall of the return plate 27, and two buffer springs 31 are arranged outside the limit rod 28. The two ends of the two buffer springs 31 are respectively fixedly connected to the slider 29 and the inner wall of the return plate 27, and the side walls of the two sliders 29 are rotatably connected with deflection plates 30. It is worth mentioning that the two deflection plates 30 are cross-arranged, and the ends of the two deflection plates 30 away from the slider 29 are rotatably connected to the two stop plates 1 respectively.

[0043] Through the above technical features, when the impact force of the truss trolley is large, the truss trolley contacts and collides with the buffer pad 6. At this time, the truss trolley pushes the two stop plates 1 to move, and the stop plates 1 are buffered by the deflection plates 30 and the buffer springs 31, thereby achieving secondary buffering of the truss trolley until the truss trolley stops, thereby achieving the effect of stopping the truss trolley.

[0044] Working principle:

[0045] 1) Installation of the stopper: clamp the two stopper plates 1 on the truss and fix the pad 4 to the truss, then clamp the U-shaped plate 8 in the two clamping grooves 42, drive the rotating shaft 12 to rotate through the rotating handle 14, the rotating shaft 12 drives the two threaded sleeves 11 to rotate, the two threaded sleeves 11 drive the two first threaded rods 10 to move relative to each other, the two first threaded rods 10 drive the two clamping plates 9 to move relative to each other, so that the clamping block 32 on the clamping plate 9 is clamped in the slot, and then the first gear 33 is limited by the teeth 38, and the installation of the stopper plate 1 is completed. At the same time, the L-shaped plate 16 is welded to the truss, thereby completing the installation of the stopper;

[0046] 2) When the truss trolley is in normal operation, the truss trolley is stopped: when the truss trolley approaches the stopper, the distance between the truss trolley and the stopper is detected by the distance sensor on the contact plate 25, and the staff is warned. When the truss trolley collides with the contact plate 25, the truss trolley is pre-buffered by the buffer telescopic rod 22 and the spring 23 to reduce the impact force during the movement of the truss trolley; when the impact force of the truss trolley is large, the truss trolley contacts and collides with the buffer pad 6, at which time the truss trolley pushes the two stop plates 1 to move, and the stop plates 1 are buffered by the deflection plate 30 and the buffer spring 31, thereby achieving secondary buffering of the truss trolley until the truss trolley stops, thereby achieving the effect of stopping the truss trolley;

[0047] 3) When the truss trolley is misoperated, the truss trolley is stopped: when the truss trolley approaches the stopper, the truss trolley still has power. At this time, the buffer pad 6 cannot stop the truss trolley, and the truss trolley continues to move until the wheel axle on the truss trolley wheel contacts the contact sensor 2 on the wedge plate 19. At this time, the two second threaded rods 17 are driven by the motor 20 to rotate, and the second threaded rods 17 drive the wedge plate 19 to move in the opposite direction of the movement of the truss trolley. The wedge plate 19 can lift the wheels of the truss trolley under the power and inertia of the truss trolley, causing the truss trolley to slip, thereby preventing the truss trolley from continuing to move, thereby preventing the truss trolley from rushing out of the truss, and achieving the effect of stopping the truss trolley.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane stop device, characterized in that: include, Two stop plates (1), the two stop plates (1) being respectively located on both sides of the truss, a mounting groove (3) being provided on a side of the stop plate (1) close to the truss, a pad (4) being slidably connected in the mounting groove (3), the pad (4) being fixedly mounted on the truss, a buffer groove (5) being provided on the stop plate (1), a buffer pad (6) being installed in the buffer groove (5); The mounting mechanism (7) is used to mount the two stop plates (1) on the truss, the mounting mechanism (7) comprising a U-shaped plate (8), two clamping plates (9) are arranged inside the U-shaped plate (8), a clamping groove (42) matching the clamping plates (9) is arranged on the stop plate (1), the two clamping plates (9) are fixedly connected to the opposite sides thereof with a first threaded rod (10), the ends of the two first threaded rods (10) away from the clamping plates (9) are slidably penetrated through the U-shaped plate, the outer surfaces of the two first threaded rods (10) are threadedly sleeved with a threaded sleeve (11), the two threaded sleeves (11) are rotatably connected to the U-shaped plate (8), a rotating shaft (12) is rotatably penetrated through the U-shaped plate (8), the rotating shaft (12) is connected to the two first threaded rods (10) through a gear set (13), and one end of the rotating shaft (12) is coaxially fixedly connected to a rotating handle (14); A sliding mechanism (15) is used to prevent the truss trolley from rushing out of the truss, the sliding mechanism (15) comprises an L-shaped plate (16) fixedly connected to one end of the truss, two second threaded rods (17) are rotatably connected to the L-shaped plate (16), and the two second threaded rods (17) are transmission-connected via a transmission mechanism (18), wedge-shaped plates (19) are slidably connected to both sides of the truss, and the two second threaded rods (17) are respectively threadedly connected to the two wedge-shaped plates (19), and a motor (20) is fixedly connected to the side wall of the L-shaped plate (16), and the drive shaft of the motor (20) rotates through the L-shaped plate (16) and is coaxially fixedly connected to one of the second threaded rods (17); A pre-buffer mechanism (21) is used to pre-buffer the truss trolley, the pre-buffer mechanism (21) comprising two buffer telescopic rods (22), the buffer telescopic rods (22) are provided with springs (23) on their outer sleeves, the two stop plates (1) are fixedly connected to buffer plates (24) on opposite sides, the stop plates (1) are provided with contact plates (25) on the outside, the contact plates (25) are embedded with distance sensors, and the two ends of the buffer telescopic rods (22) and the springs (23) are respectively fixedly connected to the two buffer plates (24) and the contact plates (25); A secondary buffer mechanism (26) is used for buffering the two stop plates (1), the secondary buffer mechanism (26) comprising a return plate (27), a limit rod (28) being fixedly connected inside the return plate (27), two sliders (29) being slidably sleeved outside the limit rod (28), the two sliders (29) being slidably connected to the inner wall of the return plate (27), two buffer springs (31) being sleeved outside the limit rod (28), the two ends of the two buffer springs (31) being fixedly connected to the slider (29) and the inner wall of the return plate (27), the side walls of the two sliders (29) being rotatably connected to a deflection plate (30), the ends of the two deflection plates (30) being away from the slider (29) being rotatably connected to the two stop plates (1).

2. A crane stop device according to claim 1, characterized in that: A clamping block (32) is provided on one side of the clamping plate (9), and a slot matching the clamping block (32) is provided in the clamping slot (42).

3. A crane stop device according to claim 1, characterized in that: The gear set (13) comprises a first gear (33) and a second gear (34) meshing with each other, the first gear (33) being coaxially fixedly connected to the rotating shaft (12), the second gear (34) being coaxially fixedly connected to the threaded sleeve (11), and a limiting mechanism (35) for limiting the position of the first gear (33) being provided on the U-shaped plate (8).

4. A crane stop device according to claim 3, characterized in that: The limiting mechanism (35) comprises a fixing plate (36) fixedly connected to the outer wall of the U-shaped plate (8), a limiting plate (37) being provided on one side of the fixing plate (36), the limiting plate (37) being fixedly connected to the fixing plate (36) via a telescopic rod (41), the limiting plate (37) being slidably connected to the U-shaped plate (8), and the limiting plate (37) being provided with teeth (38) matching the first gear (33).

5. The crane stop device according to claim 1, characterized in that: The transmission mechanism (18) comprises two pulleys (39), the two pulleys (39) are respectively coaxially fixedly connected to the two second threaded rods (17), and the two pulleys (39) are connected via a synchronous belt transmission.

6. A crane stop device according to claim 1, characterized in that: A smooth inclined surface is provided at one end of the wedge-shaped plate (19) away from the L-shaped plate (16), the inclined surface faces upward, and a baffle (40) is fixedly mounted on the upper side of the inclined surface.

7. A crane stop device according to claim 1, characterized in that: The two deflection plates (30) are arranged crosswise.

8. The crane stop device according to claim 1, characterized in that: A contact sensor (2) is embedded on the inclined surface of the wedge-shaped plate (19).

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