Protective hoisting mechanism of engineering crane

Abstract

The utility model belongs to the technical field of hoisting equipment, and particularly relates to an engineering crane protection hoisting mechanism which comprises a lifting hook, a fixing groove is formed in the left side of the upper end of the lifting hook, the fixing groove is connected with the upper end of a protection mechanism, the bottom end of the protection mechanism is connected with a clamping groove, and the clamping groove is formed in the inner side of the bottom end of the lifting hook. A limiting mechanism is arranged on the right side of the lifting hook. The protection mechanism and the limiting mechanism are connected with the lifting hook, when the lifting hook is used for lifting an article, an article rope can be hooked on the lifting hook, and then the opening of the lifting hook is sealed by the baffle, so that the situation that the rope falls off from the opening of the lifting hook and is separated from the lifting hook to cause falling of the lifted article is avoided; and meanwhile, downward pressure can be applied to the baffle through the first spring to prevent the baffle from moving upwards, the connecting plate and the baffle are limited and fixed through contact of a limiting plate in the limiting mechanism and the connecting plate, the stability of the baffle is effectively improved, and the protection effect of the baffle is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment technology, specifically relating to the protective hoisting mechanism of engineering cranes. Background Technology

[0002] The lifting mechanism is an important component of a crane, used to secure the product to be lifted. Current lifting mechanisms generally include a movable pulley and a hook. The movable pulley can roll along the wire rope, and the hook is used to suspend the heavy object. Patent document CN15974625U discloses a lifting mechanism for cranes that reduces sway. In the process of lifting goods, the drive device moves the limiting sleeve towards the hook, so that the positioning head is inserted into the groove of the limiting sleeve. The guide groove guides the guide plate into the positioning groove, so that the limiting sleeve limits the positioning head, improves the stability of the hook during movement, and reduces the sway of the goods.

[0003] However, when the above-mentioned device is used, it only uses the hook to suspend the rope on the hoisted item. During the hoisting process, the rope on the hoisted item can easily fall off from the opening of the hook, which can cause damage to the item or even injury to people below, posing a significant safety hazard. Utility Model Content

[0004] The purpose of this utility model is to provide a protective lifting mechanism for engineering cranes, which can effectively protect the hook, prevent the rope from falling off, and effectively improve the safety of lifting.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A protective hoisting mechanism for an engineering crane includes a hook. A fixing groove is provided on the upper left side of the hook, which is connected to the upper end of the protective mechanism. The bottom end of the protective mechanism is connected to a slot, which is located inside the bottom end of the hook. A limit mechanism is provided on the right side of the hook, and the limit mechanism is connected to the protective mechanism.

[0007] The protective mechanism includes a sliding rod, the two ends of which are fixedly connected to the upper and lower ends of the fixing groove, respectively.

[0008] A spring is fitted onto the slide rod, and the two ends of the spring are fixedly connected to the upper end of the fixing groove and the upper surface of the connecting plate, respectively.

[0009] The outer side of the right end of the connecting plate overlaps with the inner side of the fixing groove. A sleeve hole is provided at the right end of the connecting plate, and the sleeve hole is fitted onto the sliding rod.

[0010] The left end of the connecting plate is fixedly connected to the upper right side of the baffle, and the bottom end of the baffle is engaged with the slot.

[0011] The baffle has an installation groove, and the upper and lower ends of the installation groove are fixedly connected to the two ends of the two slide rods.

[0012] The two sliding rods are respectively fitted into the two sleeve holes, both of which are opened at the left end of the fixed plate. The right end of the fixed plate is fixedly connected to the upper surface of the pressure plate, and the bottom surface of the pressure plate is arc-shaped.

[0013] Two springs are fitted on both slide rods, and the two ends of the two springs are fixedly connected to the upper end of the mounting groove and the upper surface of the fixing plate, respectively.

[0014] The limiting mechanism includes a shielding plate, the left side of which is fixedly connected to the right side of the hook, and the upper and lower inner sides of the shielding plate are rotatably connected to the upper and lower ends of the rotating shaft through bearings, respectively. The rotating shaft is also fixedly connected to the worm gear and the right end of the limiting plate.

[0015] The worm gear meshes with the worm, and the optical axis of the worm is rotatably connected to the front and rear sides of the shielding plate through a bearing. A wheel is fixedly installed at the front end of the worm. The limiting plate is sleeved in the through groove, which is opened on the right side of the hook and communicates with the fixing groove. The left end of the bottom surface of the limiting plate overlaps with the right end of the upper surface of the connecting plate.

[0016] The technical effects achieved by this utility model are as follows:

[0017] This utility model, by setting up a protective mechanism, a limiting mechanism, and connecting them to a hook, allows the rope of the item to be hooked onto the hook when using the hook for hoisting. Then, a baffle is used to seal the opening of the hook, thereby preventing the rope from falling out of the hook and causing the hoisted item to fall. At the same time, a spring can be used to apply downward pressure to the baffle to prevent it from moving upward. The limiting mechanism uses the contact between the limiting plate and the connecting plate to limit and fix the connecting plate and the baffle, thereby effectively improving the stability of the baffle and ensuring its protective effect.

[0018] This invention features a pressure plate within the protective mechanism. When a spring pushes the baffle downwards, causing its bottom end to engage with a slot to limit and fix the hook, the pressure plate contacts the rope inside the hook. As the baffle continues to move downwards, the pressure plate and fixing plate compress the spring, causing it to generate elastic force. This elastic force then applies downward pressure to the pressure plate, thereby pressing and fixing the rope inside the hook. This prevents the rope from sliding and wearing on the hook during hoisting, thus reducing its service life. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present invention;

[0020] Figure 2This is a schematic diagram of the hook structure in this utility model;

[0021] Figure 3 This is a schematic diagram of the protective mechanism in this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the pressure plate in this utility model;

[0023] Figure 5 This is a schematic diagram of the left-side structure of the limiting mechanism in this utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Hook; 2. Fixing groove; 3. Protective mechanism; 31. Slide rod one; 32. Spring one; 33. Connecting plate; 34. Sleeve hole one; 35. Baffle; 36. Mounting groove; 37. Slide rod two; 38. Spring two; 39. Fixing plate; 310. Pressure plate; 311. Sleeve hole two; 4. Slot; 5. Limiting mechanism; 51. Baffle plate; 52. Worm gear; 53. Rotating shaft; 54. Worm; 55. Limiting plate; 6. Through groove. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figure 1-5 As shown, the protective hoisting mechanism of the engineering crane includes a hook 1. A fixing groove 2 is provided on the upper left side of the hook 1. The fixing groove 2 is connected to the upper end of the protective mechanism 3. The bottom end of the protective mechanism 3 is connected to a slot 4. The slot 4 is located inside the bottom end of the hook 1. A limit mechanism 5 is provided on the right side of the hook 1. The limit mechanism 5 is connected to the protective mechanism 3.

[0028] Furthermore, the protective mechanism 3 includes a slide rod 31, the two ends of which are fixedly connected to the upper and lower ends of the fixing groove 2, respectively.

[0029] Furthermore, a spring 32 is fitted onto the slide rod 31. The two ends of the spring 32 are fixedly connected to the upper end of the fixing groove 2 and the upper surface of the connecting plate 33, respectively. By fitting the spring 32 onto the slide rod 31, the spring 32 can apply downward pressure to the baffle 35 to prevent the baffle 35 from moving upward, thereby effectively improving the stability of the baffle 35 and ensuring the protective effect of the baffle 35.

[0030] Furthermore, the outer side of the right end of the connecting plate 33 overlaps with the inner side of the fixing groove 2, and the right end of the connecting plate 33 is provided with a sleeve hole 34, which is fitted onto the slide rod 31.

[0031] Furthermore, the left end of the connecting plate 33 is fixedly connected to the upper right side of the baffle 35, and the bottom end of the baffle 35 is engaged with the slot 4.

[0032] Furthermore, the baffle 35 has an installation groove 36, and the upper and lower ends of the installation groove 36 are fixedly connected to the two ends of the two slide rods 37.

[0033] Furthermore, two sliding rods 37 are respectively fitted into two sleeve holes 311. Both sleeve holes 311 are opened at the left end of the fixing plate 39. The right end of the fixing plate 39 is fixedly connected to the upper surface of the pressure plate 310. The bottom surface of the pressure plate 310 is arc-shaped.

[0034] Furthermore, each of the two sliding rods 37 is fitted with a spring 38. The two ends of the two springs 38 are fixedly connected to the upper end of the mounting groove 36 and the upper surface of the fixing plate 39, respectively. When the baffle 35 drives the pressure plate 310 to descend so that the pressure plate 310 contacts the lifting rope, the baffle 35 can be pressed down to make the baffle 35 continue to move down until it is inserted into the slot 4. At this time, the pressure plate 310 squeezes the spring 38 so that the spring 38 applies downward pressure to the pressure plate 310 to press and fix the lifting rope, thereby avoiding the rope from sliding and wearing on the hook 1 during the hoisting process and reducing the service life of the rope.

[0035] Furthermore, the limiting mechanism 5 includes a shielding plate 51, the left side of which is fixedly connected to the right side of the hook 1, and the upper and lower inner sides of the shielding plate 51 are rotatably connected to the upper and lower ends of the rotating shaft 53 respectively through bearings. The rotating shaft 53 is also fixedly connected to the worm gear 52 and the right end of the limiting plate 55.

[0036] Furthermore, the worm gear 52 is meshed with the worm 54, and the optical axis of the worm 54 is rotatably connected to the front and rear sides of the shielding plate 51 through the bearing. A wheel is fixedly installed at the front end of the worm 54, and the limiting plate 55 is sleeved in the through groove 6. The through groove 6 is opened on the right side of the hook 1 and communicates with the fixing groove 2. The left end of the bottom surface of the limiting plate 55 overlaps with the right end of the upper surface of the connecting plate 33. When the connecting plate 33 slides to the bottom of the fixing groove 2, the worm 54 is rotated counterclockwise, so that the left end of the limiting plate 55 moves backward and rotates to contact the connecting plate 33 to limit and fix the connecting plate 33, thereby preventing the connecting plate 33 and the baffle 35 from moving upward, and further improving the stability of the baffle 35.

[0037] The working principle of this utility model is as follows: When using this device to lift goods, the upper end of the hook 1 can be connected to the suspension structure of the crane. Then, the user can rotate the worm gear 54 clockwise, which will drive the rotating shaft 53 to rotate forward using the worm wheel 52. When the rotating shaft 53 rotates forward, it will drive the left end of the limiting plate 55 to rotate forward. When the left end of the limiting plate 55 rotates to the outside of the through groove 6, the rotation of the worm gear 54 will stop. At this time, the user can pull the baffle 35 upward to compress the spring 32. When the baffle 35 moves up a suitable distance and the opening of the hook 1 opens, the goods lifting rope hook can be hung on the hook 1, and the position of the lifting rope can be adjusted so that the lifting rope is aligned with the pressure plate 31. With the top and bottom aligned, the user can release the baffle 35 and use the spring force of spring 32 to push the baffle 35 down. When the baffle 35 drives the pressure plate 310 down to contact the suspension rope, the user can press the baffle 35 down to make it continue to move down until it is inserted into the slot 4. At this time, the pressure plate squeezes the spring 38, which applies downward pressure to the pressure plate 310 to press and fix the suspension rope. When the connecting plate 33 slides to the bottom of the fixing slot 2, the worm gear 54 is rotated counterclockwise, so that the left end of the limiting plate 55 moves backward and rotates to contact the connecting plate 33 to limit the connecting plate 33.

[0038] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A protective lifting mechanism for an engineering crane, comprising a hook (1), characterized in that: A fixing groove (2) is provided on the upper left side of the hook (1). The fixing groove (2) is connected to the upper end of the protective mechanism (3). The bottom end of the protective mechanism (3) is connected to the slot (4). The slot (4) is located inside the bottom end of the hook (1). A limiting mechanism (5) is provided on the right side of the hook (1). The limiting mechanism (5) is connected to the protective mechanism (3).

2. The protective hoisting mechanism for engineering cranes according to claim 1, characterized in that: The protective mechanism (3) includes a slide rod (31), the two ends of which are fixedly connected to the upper and lower ends of the fixing groove (2).

3. The protective hoisting mechanism for engineering cranes according to claim 2, characterized in that: A spring (32) is sleeved on the slide rod (31), and the two ends of the spring (32) are fixedly connected to the upper end of the fixing groove (2) and the upper surface of the connecting plate (33), respectively.

4. The engineering crane protective hoisting mechanism according to claim 3, characterized in that: The outer side of the right end of the connecting plate (33) overlaps with the inner side of the fixing groove (2). The right end of the connecting plate (33) is provided with a sleeve hole (34), which is fitted onto the slide rod (31).

5. The protective hoisting mechanism for engineering cranes according to claim 4, characterized in that: The left end of the connecting plate (33) is fixedly connected to the upper right side of the baffle (35), and the bottom end of the baffle (35) is engaged with the slot (4).

6. The protective hoisting mechanism for engineering cranes according to claim 5, characterized in that: The baffle (35) has an installation groove (36) inside, and the upper and lower ends of the installation groove (36) are fixedly connected to the two ends of the two slide rods (37).

7. The protective hoisting mechanism for engineering cranes according to claim 6, characterized in that: The two slide rods (37) are respectively fitted into the two sleeve holes (311). The two sleeve holes (311) are both opened at the left end of the fixing plate (39). The right end of the fixing plate (39) is fixedly connected to the upper surface of the pressure plate (310). The bottom surface of the pressure plate (310) is arc-shaped.

8. The protective hoisting mechanism for engineering cranes according to claim 7, characterized in that: Two springs (38) are fitted on both slide rods (37), and the two ends of the two springs (38) are fixedly connected to the upper end of the mounting groove (36) and the upper surface of the fixing plate (39), respectively.

9. The protective hoisting mechanism for engineering cranes according to claim 1, characterized in that: The limiting mechanism (5) includes a shielding plate (51), the left side of which is fixedly connected to the right side of the hook (1), and the upper and lower inner sides of the shielding plate (51) are rotatably connected to the upper and lower ends of the rotating shaft (53) through bearings respectively. The rotating shaft (53) is also fixedly connected to the right end of the worm gear (52) and the limiting plate (55).

10. The protective hoisting mechanism for engineering cranes according to claim 9, characterized in that: The worm gear (52) is meshed with the worm (54). The optical axis of the worm (54) is rotatably connected to the front and rear sides of the shielding plate (51) through the bearing. A wheel is fixedly installed at the front end of the worm (54). The limiting plate (55) is sleeved in the through groove (6). The through groove (6) is opened on the right side of the hook (1) and communicates through the fixing groove (2). The left end of the bottom surface of the limiting plate (55) overlaps with the right end of the upper surface of the connecting plate (33).

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