Intelligent crane smooth lifting transmission mechanism

Abstract

This invention discloses an intelligent crane smooth lifting transmission mechanism, relating to the field of crane transmission mechanism technology. It includes a support assembly for fixing the rotating mechanism, a buffer transmission assembly at one end of the support assembly for torque transition during power transmission, and an anti-impact assembly at the other end of the buffer transmission assembly for reducing starting impact. By setting the buffer transmission assembly, the power is distributed and transmitted through a planetary transmission structure composed of a sun gear, planetary gears, and an internal gear ring. When the reducer outputs power, the power is first transmitted to the sun gear, and then the torque is gradually transitioned through the meshing between multiple planetary gears and the internal gear ring. Compared with the traditional rigid direct-drive transmission method, this effectively reduces the impact load generated by the instantaneous power transmission, allowing the drum to obtain a more stable driving force, thereby reducing vibration during lifting and improving the stability and safety of the lifting operation.

Description

Technical Field

[0001] This invention relates to the field of crane transmission mechanism technology, and specifically to an intelligent crane smooth lifting transmission mechanism. Background Technology

[0002] Cranes are important lifting and transportation equipment widely used in construction, port loading and unloading, metallurgical manufacturing, energy engineering, and large equipment installation. They mainly achieve the lifting and lowering of heavy objects through a hoisting mechanism. The hoisting mechanism typically includes components such as a drive motor, reducer, drum, wire rope, and hook. Among these, the transmission mechanism, as the core part of power transmission, is responsible for transmitting the power output from the drive motor to the drum and smoothly lifting the heavy object.

[0003] Currently, existing crane lifting transmission structures typically include components such as a drive motor, coupling, reducer, brake, drum, wire rope, and hook. The drive motor, as the power source, outputs rotational power, which is transmitted to the reducer through the coupling. The reducer reduces the output speed of the motor and increases the output torque to drive the drum to rotate. The drum lifts and lowers the load by winding or releasing the wire rope. The brake is located at the motor end or the reducer end and is used to brake and lock the transmission system when the equipment stops running, ensuring that the load remains in the designated position.

[0004] In summary, the transmission mechanisms in the existing technology mainly adopt a rigid power transmission method. The motor, reducer and drum are usually directly connected, lacking effective buffering and compensation devices. When the crane starts, the torque output by the drive motor is quickly transmitted to the drum, and the wire rope changes from a slack state to a stressed state rapidly, causing the load to leave the ground instantly. This can easily generate a large starting impact, and there is a problem that the wire rope will undergo elastic deformation after being stretched, causing the load to vibrate significantly up and down. Summary of the Invention

[0005] This invention provides an intelligent crane smooth lifting transmission mechanism, which can solve the problem that the transmission mechanism of the prior art mainly adopts a rigid power transmission method. The motor, reducer and drum are usually directly connected, lacking an effective buffer and compensation device. When the crane starts, the torque output by the drive motor is quickly transmitted to the drum, and the wire rope changes from a slack state to a stressed state rapidly, causing the load to lift off the ground instantly, which can easily generate a large starting impact. There is also the problem that the wire rope will undergo elastic deformation after being stretched, causing the load to vibrate significantly up and down.

[0006] The objective of this invention can be achieved through the following technical solutions: A smart crane smooth lifting transmission mechanism includes a support assembly for fixing a rotating mechanism, one end of the support assembly is provided with a buffer transmission assembly for torque transition of power transmission, and one end of the buffer transmission assembly is provided with an anti-impact assembly for reducing starting impact. The support assembly includes a crossbeam, a motor for providing power, a motor for reducing speed and increasing torque at one end of the motor, and a speed reducer at the other end of the motor. The buffer transmission assembly includes a drum and a first housing. An internal gear ring is fixedly connected to the inner circumference of the first housing. The internal gear ring and the first housing are fixedly installed. Multiple planetary gears are arranged inside the internal gear ring. The multiple planetary gears are evenly distributed and mesh with the internal gear ring respectively. A sun gear is synchronously supported and constrained among the multiple planetary gears. A transmission shaft is fixedly connected to the middle of the sun gear. One end of the transmission shaft is fixedly connected to the output end of the reducer. The shock-resistant assembly includes a second housing, the inner wall of which is provided with an inner friction ring for increasing friction, a limiting plate for limiting position in the middle of the second housing, and friction blocks for attenuating the instantaneous acceleration of the drum during startup by friction with the inner friction ring around the limiting plate.

[0007] Preferably, ball bearings are provided at both ends of the drive shaft, and positioning grooves are provided at both ends of the first housing. The ball bearings are rotatably connected to the drive shaft through the positioning grooves.

[0008] Preferably, the inner wall of the first housing is provided with a slot, and the internal gear ring is engaged with the inside of the first housing through the slot.

[0009] Preferably, the drive shaft passes through the middle of the second housing, and the drive shaft is fixedly connected to the limiting plate.

[0010] Preferably, the limiting plate has a limiting groove around its perimeter that can fit into the friction block, and one end of the friction block has a connecting groove. A reset spring with one end fixedly connected to the inner wall of the inner friction ring is fixedly connected inside the connecting groove.

[0011] Preferably, one end of the drum is provided with a connecting shaft, and the other end of the first housing is provided with a support base, and the drum is supported between the crossbeams by the support base.

[0012] Preferably, a fixed bracket is fixedly connected to the surface of the drum, a side fixed cylinder is rotatably connected to the top of the fixed bracket, and a steel wire rope is wound around the surface of the drum.

[0013] Preferably, a hook is provided below the wire rope, and the wire rope is wound between the drum and the hook through a side fixing cylinder.

[0014] Preferably, after one end of the drive shaft is fixedly connected to the output end of the motor, it passes through the buffer transmission assembly and the anti-impact assembly and is fixedly connected to one end of the drum through the connecting shaft.

[0015] Preferably, a planet carrier is provided on the back of the sun gear, and three planet gear mounting shafts are evenly spaced on the sun gear, with the three planet gears rotatably mounted on their respective planet gear mounting shafts via bearing structures.

[0016] The intelligent crane smooth lifting transmission mechanism provided by this invention has, but is not limited to, the following beneficial effects compared with the prior art: 1. This invention utilizes a buffer transmission component and a planetary transmission structure composed of a sun gear, planetary gears, and an internal gear ring to distribute and transmit power. When the reducer outputs power, the power is first transmitted to the sun gear, and then the torque is gradually transitioned through the meshing action between multiple planetary gears and the internal gear ring. Compared with the traditional rigid direct drive method, this invention can effectively reduce the impact load generated by the instantaneous transmission of power, allowing the drum to obtain a more stable driving force, thereby reducing the vibration phenomenon generated during the lifting of the load and improving the stability and safety of the lifting operation.

[0017] 2. By setting up an anti-impact component, the limiting plate drives the friction block to rotate synchronously during the rotation of the transmission shaft. Under the action of centrifugal force, the friction block moves outward and contacts the inner friction ring to generate frictional resistance, so that the transmission system forms a progressive power output effect during the start-up phase. This structure can absorb part of the impact energy generated at the moment of motor start-up, reduce the starting acceleration of the drum, and prevent the wire rope from suddenly entering a stressed state from a slack state. This effectively reduces the shaking and swaying generated at the moment the load leaves the ground and improves the smoothness of the lifting process. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the buffer transmission assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the impact-resistant component of the present invention; Figure 6 This is a partial structural breakdown diagram of the present invention.

[0020] In the diagram: 1. Support assembly; 2. Buffer transmission assembly; 3. Impact protection assembly; 11. Crossbeam; 12. Motor; 13. Reducer; 21. Connecting shaft; 22. Drum; 23. First housing; 2300. Slot; 2301. Positioning slot; 230. Drive shaft; 231. Internal gear ring; 232. Planetary gear; 233. Sun gear; 234. Ball bearing; 235. Planetary carrier; 24. Support seat; 25. Side fixing cylinder; 26. Fixing bracket; 27. Wire rope; 28. Hook; 31. Second housing; 32. Limiting plate; 310. Limiting groove; 33. Friction block; 330. Connecting groove; 34. Return spring; 35. Inner friction ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0022] like Figure 1-6 As shown, a smart crane smooth lifting transmission mechanism includes a support component 1 for fixing the rotating mechanism, a buffer transmission component 2 for torque transition of power transmission is provided at one end of the support component 1, and an anti-impact component 3 for reducing starting impact is provided at one end of the buffer transmission component 2. The support assembly 1 includes a crossbeam 11 and a motor 12 for providing power. One end of the motor 12 is equipped with a motor 12 for reducing the speed and increasing the torque, and the other end of the motor 12 is equipped with a reducer 13. The crossbeam 11 is made of high-strength steel structure, and its two ends are fixedly connected to the main frame of the crane. It is used to provide installation support for the drum 22, the buffer transmission assembly 2, and the anti-impact assembly 3. The buffer transmission assembly 2 includes a drum 22 and a first housing 23. The first housing 23 is cylindrical in shape and has an annular groove 2300 inside. An internal gear ring 231 is fixedly connected to the inner circumference of the first housing 23. The internal gear ring 231 and the first housing 23 are fixedly installed. Multiple planetary gears 232 are arranged inside the internal gear ring 231. The multiple planetary gears 232 are evenly distributed and mesh with the internal gear ring 231 respectively. A sun gear 233 is synchronously supported and constrained among the multiple planetary gears 232. A transmission shaft 230 is fixedly connected to the middle of the sun gear 233. One end of the transmission shaft 230 is fixedly connected to the output end of the reducer 13. The output end of the reducer 13 and one end of the transmission shaft 230 are fixedly connected by a spline connection or a shrink sleeve connection, so that the power output by the reducer 13 can be stably transmitted to the transmission shaft 230. The transmission shaft 230 passes through the anti-impact assembly 3 and the buffer transmission assembly 2 in sequence along the axial direction, and is fixedly connected to the drum 22 through the connecting shaft 21, thereby forming a complete power transmission path. The shock-resistant assembly 3 includes a second housing 31. The inner wall of the second housing 31 is provided with an inner friction ring 35 for increasing friction. A limiting piece 32 for limiting is provided in the middle of the second housing 31. Friction blocks 33 are provided around the limiting piece 32 for attenuating the instantaneous acceleration of the drum 22 during startup through friction with the inner friction ring 35. Ball bearings 234 are provided at both ends of the drive shaft 230. Positioning grooves 2301 are provided at both ends of the first housing 23. The ball bearings 234 are rotatably connected to the drive shaft 230 through the positioning grooves 2301. By setting the ball bearings 234, the frictional resistance generated when the drive shaft 230 rotates can be significantly reduced, the transmission efficiency can be improved, and the coaxiality and stability of the drive shaft 230 during operation can be guaranteed.

[0023] The inner wall of the first housing 23 is provided with a slot 2300. The internal gear ring 231 is engaged with the inside of the first housing 23 through the slot 2300. The internal gear ring 231 is embedded in the inside of the first housing 23 through the slot 2300 and forms a fixed connection, thereby ensuring that the internal gear ring 231 remains stationary during operation. When the transmission shaft 230 drives the sun gear 233 to rotate, the sun gear 233 drives the three planet gears 232 to rotate around their own axis. At the same time, under the constraint of the internal gear ring 231, they generate a revolution motion, which in turn drives the planet carrier 235 to rotate synchronously. Since the planetary gear mechanism has the characteristic of multiple teeth meshing at the same time, the power can be distributed and transmitted through multiple planet gears 232, making the transmission load distribution more uniform and reducing the phenomenon of local force concentration. At the same time, the meshing process between the planet gears 232 and the internal gear ring 231 can transmit power gradually and achieve smooth torque transition, thereby effectively reducing the instantaneous impact load generated when the motor 12 starts.

[0024] The drive shaft 230 passes through the middle of the second housing 31 and is fixedly connected to the limiting plate 32. The limiting plate 32 has limiting grooves 310 around its perimeter that can fit into the friction block 33. One end of the friction block 33 has a connecting groove 330. A return spring 34, one end of which is fixedly connected to the inner wall of the inner friction ring 35, is fixedly connected inside the connecting groove 330. When the equipment is stationary, the return spring 34 is in its natural state, and the friction block 33 and the inner friction ring 35 maintain appropriate contact. When the motor 12 starts, the drive shaft 230 drives the limiting plate 32 to rotate. Due to centrifugal force, the friction block 33 moves outward along the limiting groove 310 and presses against the inner friction ring 35, thereby generating frictional resistance. This frictional resistance can absorb part of the starting energy and attenuate the instantaneous acceleration of the drum 22 during startup, causing the drum 22 to start from a standstill. The state gradually enters a stable rotation state, effectively avoiding the sudden tension of the wire rope 27 and the resulting violent vibration. One end of the drum 22 is provided with a connecting shaft 21, and the other end of the first housing 23 is provided with a support seat 24. The drum 22 is supported between the crossbeams 11 through the support seat 24. A fixed bracket 26 is fixedly connected to the surface of the drum 22, and a side fixed cylinder 25 is rotatably connected to the top of the fixed bracket 26. The wire rope 27 is wound around the surface of the drum 22, and a hook 28 is provided below the wire rope 27. The wire rope 27 is wound between the drum 22 and the hook 28 through the side fixed cylinder 25. The side fixed cylinder 25 can guide and support the wire rope 27, so that the wire rope 27 remains stably arranged during winding and unwinding, avoiding the wire rope 27 from crossing, jumping out of the groove or local wear, and improving the service life and operational safety of the wire rope 27.

[0025] After one end of the drive shaft 230 is fixedly connected to the output end of the motor 12, it passes through the buffer transmission assembly 2 and the anti-impact assembly 3 and is fixedly connected to one end of the drum 22 via the connecting shaft 21. A planet carrier 235 is provided on the back of the sun gear 233. Three planet gear mounting shafts are evenly spaced on the sun gear 233. The three planet gears 232 are rotatably mounted on the corresponding planet gear mounting shafts through the bearing structure. The planet gears 232 mesh with the sun gear 233 and the internal gear ring 231 to form a planetary gear transmission mechanism.

[0026] The working principle of this invention is as follows: During operation, after the motor 12 starts, it drives the reducer 13 to output power. The reducer 13 drives the transmission shaft 230 to rotate. The transmission shaft 230 first passes through the friction buffering effect of the anti-impact component 3 to absorb and weaken the starting impact. Then, the power is transmitted to the sun gear 233 in the buffer transmission component 2. Through the planetary transmission mechanism formed by the planetary gear 232 and the internal gear ring 231, torque splitting and flexible transition are achieved. Finally, the power is transmitted to the drum 22 through the connecting shaft 21, which drives the drum 22 to rotate slowly and smoothly, so that the wire rope 27 is gradually wound up and drives the hook 28 to complete the lifting operation of the heavy object. Throughout the process, the anti-impact component 3 and the buffer transmission component 2 work together to achieve the gradual output of power and the absorption of impact load, thereby effectively reducing the vibration generated at the moment of lifting the object and improving the stability and safety of the lifting process.

[0027] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A smart crane smooth lifting transmission mechanism, comprising a support assembly (1) for fixing a rotating mechanism, characterized in that, One end of the support component (1) is provided with a buffer transmission component (2) for torque transition of power transmission, and one end of the buffer transmission component (2) is provided with an anti-impact component (3) for weakening the starting impact. The support assembly (1) includes a crossbeam (11) and a motor (12) for providing power. One end of the motor (12) is provided with a motor (12) for reducing the speed and increasing the torque, and the other end of the motor (12) is provided with a reducer (13). The buffer transmission assembly (2) includes a drum (22) and a first housing (23). An internal gear ring (231) is fixedly connected to the inner circumference of the first housing (23). The internal gear ring (231) and the first housing (23) are fixedly installed. Multiple planetary gears (232) are arranged inside the internal gear ring (231). The multiple planetary gears (232) are evenly distributed and mesh with the internal gear ring (231) respectively. A sun gear (233) is synchronously supported and constrained among the multiple planetary gears (232). A transmission shaft (230) is fixedly connected to the middle of the sun gear (233). One end of the transmission shaft (230) is fixedly connected to the output end of the reducer (13). The shock-resistant component (3) includes a second housing (31), the inner wall of which is provided with an inner friction ring (35) for increasing friction, and a limiting piece (32) for limiting the position in the middle of the second housing (31). The limiting piece (32) is provided with friction blocks (33) around its perimeter for attenuating the instantaneous acceleration of the drum (22) by friction with the inner friction ring (35).

2. The intelligent crane smooth lifting transmission mechanism according to claim 1, characterized in that, The drive shaft (230) is provided with ball bearings (234) at both ends, and the first housing (23) is provided with positioning grooves (2301) at both ends. The ball bearings (234) are rotatably connected to the drive shaft (230) through the positioning grooves (2301).

3. The intelligent crane smooth lifting transmission mechanism according to claim 2, characterized in that, The inner wall of the first housing (23) is provided with a slot (2300), and the internal gear ring (231) is engaged with the inside of the first housing (23) through the slot (2300).

4. The intelligent crane smooth lifting transmission mechanism according to claim 2, characterized in that, The drive shaft (230) passes through the middle of the second housing (31), and the drive shaft (230) is fixedly connected to the limiting piece (32).

5. The intelligent crane smooth lifting transmission mechanism according to claim 1, characterized in that, The limiting plate (32) has a limiting groove (310) around its perimeter that can fit into the friction block (33). The friction block (33) has a connecting groove (330) at one end. A reset spring (34) with one end fixedly connected to the inner wall of the inner friction ring (35) is fixedly connected inside the connecting groove (330).

6. The intelligent crane smooth lifting transmission mechanism according to claim 3, characterized in that, One end of the drum (22) is provided with a connecting shaft (21), and the other end of the first housing (23) is provided with a support seat (24). The drum (22) is mounted between the crossbeams (11) through the support seat (24).

7. The intelligent crane smooth lifting transmission mechanism according to claim 6, characterized in that, A fixed bracket (26) is fixedly connected to the surface of the drum (22), and a side fixed cylinder (25) is rotatably connected to the top of the fixed bracket (26). A steel wire rope (27) is wound around the surface of the drum (22).

8. The intelligent crane smooth lifting transmission mechanism according to claim 7, characterized in that, A hook (28) is provided below the wire rope (27), and the wire rope (27) is wound between the drum (22) and the hook (28) through the side fixing cylinder (25).

9. The intelligent crane smooth lifting transmission mechanism according to claim 4, characterized in that, After one end of the drive shaft (230) is fixedly connected to the output end of the motor (12), it passes through the buffer transmission assembly (2) and the anti-impact assembly (3) and is fixedly connected to one end of the drum (22) via the connecting shaft (21).

10. The intelligent crane smooth lifting transmission mechanism according to claim 1, characterized in that, The sun gear (233) has a planet carrier (235) on its back side. Three planet gear mounting shafts are evenly spaced on the sun gear (233). The three planet gears (232) are rotatably mounted on their respective planet gear mounting shafts via bearing structures.

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