Hoisting mechanism of crane

Abstract

The utility model relates to the technical field of hoisting mechanical equipment, in particular to a hoisting mechanism of a crane, which comprises a hoisting mechanism body, four uniformly distributed rollers are arranged at the bottom end of the hoisting mechanism body, and symmetrically distributed accommodating grooves are formed in the bottom end of the hoisting mechanism body. A storage groove is formed in the lifting mechanism body, a synchronous electric push rod is arranged in the storage groove, the bottom end of a telescopic rod of the synchronous electric push rod is fixedly connected with a base for preventing the lifting mechanism body from moving, sliding grooves are formed in the front outer wall and the rear outer wall of the lifting mechanism body, supporting rods are arranged in the sliding grooves, and limiting threaded connecting rods are arranged on the supporting rods. According to the utility model, the synchronous electric push rod, the base, the supporting rod and the limiting threaded connecting rod are matched with one another, so that double limiting measures are added, the rollers are prevented from rolling at will, the position of the hoisting mechanism is prevented from shifting, and the safety risk is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery and equipment, in particular to a crane hoisting mechanism. Background Art

[0002] The hoisting mechanism of a crane is its core component, primarily consisting of a drive unit, transmission, drum, wire rope, pulley block, and hook. Its significance lies in its ability to rotate the drum, retract and release the wire rope, and drive the pulley block and hook to achieve the vertical lifting and lowering of heavy objects. The hoisting mechanism of a crane plays a key role in numerous fields, including industrial production, construction, and port logistics. It efficiently and safely completes the lifting and handling of various heavy objects, significantly improving production efficiency and reducing labor intensity, providing strong technical support for modern engineering construction and material transportation.

[0003] A crane lifting mechanism with application number CN202020661880.8 includes a frame, a first drum, a second drum, a cable, a first drive device, a second drive device, a chain, a wheel group and two sprockets. The wheel group is installed at the bottom of the frame. The first drive device is used to drive the wheel group to move. The first drum and the second drum are respectively rotatably installed on the frame. A sprocket is respectively installed at one end of the first drum and one end of the second drum. The chain is installed on the two sprockets. The second drive device is used to drive the first drum and the second drum to rotate. The diameter of the first drum is larger than the diameter of the second drum. The cable is wound around the first drum and the second drum. When the second drum lowers the cable, the first drum winds the cable upward. When the second drum winds the cable upward, the first drum lowers the cable.

[0004] The above patent document has the beneficial effects of using differential drive to lift cargo, strict position limiting, smooth transmission lifting, and safe and reliable lifting of cargo. However, due to the lack of effective limiting measures, the rollers at the bottom of the lifting mechanism are prone to uncontrolled rolling. In an actual working environment, the ground may have a certain slope or vibrations caused by equipment operation, which can cause the rollers to roll. When the rollers roll randomly, the position of the lifting mechanism will be offset, which not only affects the accuracy of the lifting operation, but may also cause the lifted objects to shake in the air, increasing safety risks. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the rollers at the bottom of the existing lifting mechanism are prone to uncontrolled rolling due to the lack of effective restriction measures. When the rollers roll randomly, the position of the lifting mechanism will be offset, which not only affects the accuracy of the lifting operation, but also may cause the lifted heavy objects to swing in the air, increasing the safety risk. A crane lifting mechanism is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A crane lifting mechanism includes a lifting mechanism body, four evenly distributed rollers are provided at the bottom end of the lifting mechanism body, symmetrically distributed storage grooves are provided at the bottom end of the lifting mechanism body, a synchronous electric push rod is provided in the storage groove, the bottom end of the telescopic rod of the synchronous electric push rod is fixedly connected to a base for preventing the lifting mechanism body from moving, the front and rear outer walls of the lifting mechanism body are provided with sliding grooves, a support rod is provided in the sliding groove, and a limiting threaded connecting rod is provided on the support rod.

[0008] Preferably, the top of the inner wall of the storage groove is fixedly connected with symmetrically distributed sliding rods, the top of the base is fixedly connected with symmetrically distributed hollow sleeves, and the sliding rods are slidably connected to the inner wall of the hollow sleeves.

[0009] Preferably, the bottom end of the outer wall of the base is provided with anti-slip grooves.

[0010] Preferably, the upper and lower inner walls of the slide groove are provided with symmetrically distributed mounting holes, a rotating shaft is slidably connected to the mounting hole, and the rotating shaft is fixedly connected to one end of the support rod.

[0011] Preferably, a threaded hole is formed at one end of the support rod away from the rotating shaft, and the threaded hole is threadedly connected to the limiting threaded connecting rod.

[0012] Preferably, a stopper is provided at the top end of the limiting threaded connecting rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] When the utility model is in use, the synchronous electric push rod, the base and the support rod, and the limiting threaded connecting rod can cooperate with each other, so that the synchronous electric push rod can push the base to contact the ground and lift the roller away from the ground, so that the lifting mechanism body will no longer move easily. The combination of the support rod and the limiting threaded connecting rod can enhance the anti-slip ability of the lifting mechanism body and assist the synchronous electric push rod in supporting the lifting mechanism body, reducing the pulling force caused by lifting, thereby adding a double restriction measure, preventing the roller from rolling at will and preventing the position of the lifting mechanism from shifting, thereby greatly reducing the safety risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a crane hoisting mechanism proposed in the utility model;

[0016] Figure 2 This is a schematic diagram of the back three-dimensional structure of a crane hoisting mechanism proposed by the present invention;

[0017] Figure 3 This is a cross-sectional view of a crane hoisting mechanism proposed in this utility model Figure 1 ;

[0018] Figure 4 This is a cross-sectional view of a crane hoisting mechanism proposed in this utility model Figure 2 .

[0019] In the figure: 1. Lifting mechanism body; 2. Roller; 3. Storage slot; 4. Synchronous electric push rod; 5. Base; 6. Slide groove; 7. Support rod; 8. Restricted threaded connecting rod; 9. Slide rod; 10. Hollow sleeve; 11. Anti-slip groove; 12. Mounting hole; 13. Rotating shaft; 14. Threaded hole; 15. Stop block. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Reference Figures 1-4 A crane lifting mechanism includes a lifting mechanism body 1, four evenly distributed rollers 2 are provided at the bottom end of the lifting mechanism body 1, symmetrically distributed storage grooves 3 are provided at the bottom end of the lifting mechanism body 1, a synchronous electric push rod 4 is provided in the storage groove 3, and the bottom end of the telescopic rod of the synchronous electric push rod 4 is fixedly connected to a base 5 for preventing the lifting mechanism body 1 from moving, a slide groove 6 is provided on the front and rear outer walls of the lifting mechanism body 1, a support rod 7 is provided in the slide groove 6, and a limiting threaded connecting rod 8 is provided on the support rod 7.

[0022] It should be noted that the lifting mechanism body 1 and the synchronous electric push rod 4 are existing technologies. The specific model specifications need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated.

[0023] Furthermore, the top of the inner wall of the storage groove 3 is fixedly connected with symmetrically distributed sliding rods 9, and the top of the base 5 is fixedly connected with symmetrically distributed hollow sleeves 10, and the sliding rods 9 are slidably connected to the inner wall of the hollow sleeve 10.

[0024] Among them, the position of the slide rod 9 is adapted to the position of the hollow sleeve 10, and the lengths of the slide rod 9 and the hollow sleeve 10 are adapted, so that when the base 5 drives the hollow sleeve 10 to move downward, the slide rod 9 can always be inside the hollow sleeve 10, avoiding the base 5 from being offset and unable to be retracted into the receiving groove 3.

[0025] Furthermore, anti-slip grooves 11 are provided on the bottom end of the outer wall of the base 5 .

[0026] The anti-slip pattern 11 is composed of a vertical protrusion and several horizontal protrusions, which can increase the friction when the base 5 contacts the ground, so that the lifting mechanism body 1 is not easy to slide.

[0027] Furthermore, the upper and lower inner walls of the slide groove 6 are provided with symmetrically distributed mounting holes 12 , and a rotating shaft 13 is slidably connected to the mounting hole 12 , and the rotating shaft 13 is fixedly connected to one end of the support rod 7 .

[0028] Both ends of the support rod 7 are semicircular ends, so that the support rod 7 can rotate around the rotating shaft 13 without being blocked.

[0029] Furthermore, a threaded hole 14 is formed at one end of the support rod 7 away from the rotating shaft 13 , and the threaded hole 14 is threadedly connected to the limiting threaded connecting rod 8 .

[0030] Among them, by twisting the limiting threaded connecting rod 8 to move it downward at the position of the threaded hole 14, it can not only limit the movement of the lifting mechanism body 1, but also support the lifting mechanism body 1, reduce the pulling force caused by lifting, and reduce the pressure on the synchronous electric push rod 4.

[0031] Furthermore, a stopper 15 is provided at the top end of the limiting threaded connecting rod 8 .

[0032] The stopper 15 can prevent the threaded connecting rod 8 from falling out of the threaded hole 14 .

[0033] Working principle: Before the lifting mechanism lifts heavy objects, first push the lifting mechanism body 1 to the appropriate position, then start the synchronous electric push rods 4 on both sides at the same time, and then the synchronous electric push rods 4 push the base 5 to move downward. After the base 5 contacts the ground, the synchronous electric push rods 4 continue to push. Under the action of the reaction force, the lifting mechanism body 1 is lifted until the roller 2 leaves the ground, and then manually pull out the support rod 7, rotate the limiting threaded connecting rod 8 and insert it into the threaded hole 14, and keep rotating until the limiting threaded connecting rod 8 contacts the ground, completing the restriction of the lifting mechanism body 1, thereby adding double restriction measures, so that the roller 2 no longer rolls at will, and the position of the lifting mechanism no longer shifts, greatly reducing the safety risk.

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A crane hoisting mechanism, comprising a hoisting mechanism body (1), characterized in that: The bottom end of the lifting mechanism body (1) is provided with four evenly distributed rollers (2), the bottom end of the lifting mechanism body (1) is provided with symmetrically distributed storage grooves (3), a synchronous electric push rod (4) is provided inside the storage groove (3), the bottom end of the telescopic rod of the synchronous electric push rod (4) is fixedly connected to a base (5) for preventing the lifting mechanism body (1) from moving, the front and rear outer walls of the lifting mechanism body (1) are provided with a slide groove (6), a support rod (7) is provided in the slide groove (6), and a limiting threaded connecting rod (8) is provided on the support rod (7).

2. A crane hoisting mechanism according to claim 1, characterized in that: The top of the inner wall of the receiving groove (3) is fixedly connected to a symmetrically distributed sliding rod (9), the top of the base (5) is fixedly connected to a symmetrically distributed hollow sleeve (10), and the sliding rod (9) is slidably connected to the inner wall of the hollow sleeve (10).

3. The crane hoisting mechanism according to claim 1, characterized in that: The bottom end of the outer wall of the base (5) is provided with anti-slip grooves (11).

4. The crane hoisting mechanism according to claim 1, characterized in that: The upper and lower inner walls of the slide groove (6) are provided with symmetrically distributed mounting holes (12), and a rotating shaft (13) is slidably connected to the mounting hole (12), and the rotating shaft (13) is fixedly connected to one end of the support rod (7).

5. The crane hoisting mechanism according to claim 1, characterized in that: A threaded hole (14) is formed at one end of the support rod (7) away from the rotating shaft (13), and the threaded hole (14) is threadedly connected to the limiting threaded connecting rod (8).

6. The crane hoisting mechanism according to claim 1, characterized in that: A stopper (15) is provided at the top end of the limiting threaded connecting rod (8).

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