Lifting mechanism capable of automatically steering for three-dimensional intelligent warehouse

Abstract

The lifting mechanism comprises a moving trolley, a plurality of guide wheel assemblies are installed on the moving trolley, each guide wheel assembly comprises a support, and the supports are fixedly connected to the lower surface of the moving trolley; when the pallet fork assembly stretches out, the sliding sleeve is driven to rotate through the trigger block, so that the mounting frame on the guide rod rotates along with the sliding sleeve, the top plate is jacked up, control over the elevator body is simplified, the service life of the elevator body is prolonged, and the fault risk is reduced; the guide wheel assembly abuts against the side face of the rail head through the guide wheel body and abuts against the rail waist through the balls, and therefore the moving flexibility and stability of the moving trolley are guaranteed. According to the rotating disc assembly, the first motor drives the second gear to roll on the first gear, the connecting base drives the rotating disc body, the first positioning rod, the second gear and the sliding table are used for jointly supporting the rotating disc body, and the problem that the cost is too high due to the adoption of a slewing bearing is solved while the rotating function is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent warehouses, and particularly to a lifting mechanism for a three-dimensional intelligent warehouse capable of automatically turning. Background Art

[0002] With the rapid development of the modern logistics industry, higher requirements are put forward for the efficiency and accuracy of the warehousing link. The traditional warehousing mode cannot meet the needs of the logistics industry for rapid storage, retrieval, and distribution of goods. Three-dimensional warehouses can realize the automatic storage and retrieval of goods, and are closely integrated with the logistics distribution system, improving the efficiency of the entire logistics supply chain. The three-dimensional intelligent warehouse mainly stores a variety of goods in an orderly manner at different heights of the shelf positions through a lifting mechanism. The existing lifting mechanism of the three-dimensional intelligent warehouse mainly includes a mobile trolley, a lifter, and a telescopic fork. The mobile trolley slides smoothly on the ground track, driving the connected lifter to move in a straight line along a predetermined route and accurately positioning to the target shelf column. The lifter then drives the telescopic fork to shuttle up and down to achieve the vertical displacement of the goods. The three cooperate closely to jointly achieve the efficient transfer of goods. However, the existing lifting mechanism of the three-dimensional intelligent warehouse has the following disadvantages when in use: 1. The operation of the fork depends on the lifter. When picking up goods, the lifter first transfers the fork to the bottom of the goods, extends the fork and then lifts, and then the fork contracts and moves out of the shelf; when putting down goods, the lifter needs to drive the fork to move down. Since all the lifting actions required for the fork to support the goods need to be executed by the lifter, the control of the lifter becomes complicated, and at the same time, the service life of the lifter is reduced and the failure risk increases; 2. The existing mobile trolley of the lifting mechanism is composed of a base, an I-shaped track, a motor, a walking wheel, and a guide wheel. The motor drives the walking wheel to roll on the upper surface of the rail head to drive the base to move, and the guide wheel rolls on the side surface of the rail head to prevent tipping. However, once the side surface of the guide wheel contacts the rail waist, it is easy to cause wear and jamming, and if a gap is reserved, the mobile trolley will shake, affecting normal operation; 3. The existing load platform of the lifting mechanism cannot rotate, resulting in the telescopic fork being unable to pick up goods in the vertical direction, so it is not suitable for three-way stacking. Some technologies achieve rotation through a motor-driven slewing bearing, but the slewing bearing has a high cost and a large weight, resulting in a significant increase in the equipment manufacturing and operation costs. Summary of the Invention

[0003] The purpose of the present invention is to provide a lifting mechanism for a three-dimensional intelligent warehouse capable of automatically turning to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: a lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering, including a mobile trolley, on which a plurality of guide wheel assemblies are installed. The guide wheel assembly includes a support, and the support is fixedly connected to the lower surface of the mobile trolley. A first connecting shaft is fixedly connected to the support, a bearing is fixedly connected to the first connecting shaft, a guide wheel body is fixedly connected to the bearing, a track is provided at the bottom end of the mobile trolley, and the guide wheel body is in rolling connection with the track. One end of the first connecting shaft is fixedly connected to a housing, and the housing is disposed on one side of the bearing. A ball is in rolling connection in the housing, and the ball is in rolling connection with the track. A second retaining ring is sleeved on the ball, and the second retaining ring is fixedly connected to the housing.

[0005] Preferably, a first retaining ring is provided on the other side of the bearing, and the first retaining ring is fixedly connected to the support. A first screw is installed on the support, and the first screw is threadedly connected to the first connecting shaft. A second screw is installed on the second retaining ring, and the second screw is threadedly connected to the housing.

[0006] Preferably, a hoist body is fixedly connected to the upper surface of the mobile trolley. A turntable assembly is installed at the output end of the hoist body. The turntable assembly includes a load platform, a positioning sleeve, a first gear, an annular track, a first positioning rod, a turntable body, a connecting seat, a second gear, a first motor, and a slide. The load platform is fixedly connected to the output end of the hoist body. A positioning sleeve is fixedly connected to the upper surface of the load platform. A first positioning rod is sleeved in the positioning sleeve. The top end of the first positioning rod is fixedly connected to the turntable body, and the turntable body is rotatably connected to the load platform. A first gear is fixedly connected to the load platform. A connecting seat is fixedly connected to the turntable body. A plurality of second gears are rotatably connected to the connecting seat, and the second gears are meshed with the first gear. A first motor is fixedly connected to the connecting seat, and the output end of the first motor is fixedly connected to one of the second gears.

[0007] Preferably, an annular track is fixedly connected to the upper surface of the load platform. A plurality of slides are evenly distributed on the lower surface of the turntable body, and the slides are slidably connected to the annular track.

[0008] Preferably, a fork assembly is installed on the turntable body. The fork assembly includes a lower fork, a middle fork, a second motor, a second connecting shaft, a first pulley, a synchronous belt, a second pulley, a slider, an upper fork, a guide rod, a first limiting plate, a third connecting shaft, a sliding sleeve, a trigger block, a spring, a second limiting plate, a stop block, an inclined surface, a mounting bracket, a roller, a top plate, a groove, a second positioning rod, and a guide hole. The lower fork is fixedly connected to the turntable body. The middle fork is slidably connected to the lower fork, and the upper fork is slidably connected to the middle fork. A second motor is fixedly connected to the middle fork. The output end of the second motor is fixedly connected to a second connecting shaft, and the second connecting shaft is rotatably connected to the middle fork. A first pulley is fixedly connected to the second connecting shaft. A synchronous belt is drivingly connected to the first pulley, and a second pulley is drivingly connected to the synchronous belt. The second pulley is rotatably connected to the middle fork. Sliders are fixedly connected to both outer walls of the synchronous belt. One of the sliders is fixedly connected to the lower fork, and the other slider is fixedly connected to the upper fork.

[0009] Preferably, a guide rod is arranged inside the upper fork. Both ends of the guide rod are fixedly connected with a first limiting plate. A third connecting shaft is fixedly connected to the first limiting plate, and the third connecting shaft is rotatably connected to the upper fork. A sliding sleeve is arranged on one side of the first limiting plate, and the sliding sleeve is slidably connected to the guide rod. Four trigger blocks are evenly distributed on the sliding sleeve. A spring is arranged on one side of the sliding sleeve, and the spring is sleeved on the guide rod. The other end of the spring is provided with a second limiting plate, and the second limiting plate is fixedly connected to the guide rod.

[0010] Preferably, a stop block is fixedly connected to the middle fork at a position corresponding to the lowermost trigger block. An inclined surface is arranged on the outer wall of one side of the stop block.

[0011] Preferably, a mounting bracket is fixedly connected to the guide rod. Rollers are rotatably connected to both ends of the mounting bracket.

[0012] Preferably, a top plate is arranged at the top end of the upper fork. Grooves are formed on the lower surface of the top plate at positions corresponding to the guide rods.

[0013] Preferably, second positioning rods are fixedly connected to the four corners of the lower surface of the top plate. Guide holes are formed on the upper fork at positions corresponding to the second positioning rods, and the second positioning rods are slidably connected to the guide holes.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: when the fork assembly of the present invention is extended, the sliding sleeve is driven to rotate by the trigger block, so that the mounting frame on the guide rod rotates accordingly, thereby lifting the top plate, thereby simplifying the control of the elevator body, extending its service life, and reducing the risk of failure; the guide wheel assembly uses the guide wheel body to resist the side of the rail head and uses the ball to resist the rail waist, thereby ensuring the flexibility and stability of the movement of the mobile trolley; the turntable assembly drives the second gear to roll on the first gear through the first motor, drives the turntable body through the connecting seat, and uses the first positioning rod, the second gear and the slide table to jointly support the turntable body, while realizing the rotation function, solving the problem of excessive cost caused by the use of slewing bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the guide wheel assembly of the present invention;

[0017] Figure 3 It is an exploded view of the three-dimensional structure of the guide wheel assembly of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional cutaway structure of the turntable assembly of the present invention;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the fork assembly of the present invention after removing the top plate;

[0020] Figure 6 for Figure 5 A magnified view of the structure in the middle A area;

[0021] Figure 7 for Figure 5 A magnified view of the structure in the middle B area;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the top plate of the present invention;

[0023] Figure 9 It is a schematic diagram of the three-dimensional structure of the fork assembly of the present invention in an extended state.

[0024] In the figure: 1. Mobile trolley; 11. Track; 12. Hoist body; 2. Guide wheel assembly; 21. Support; 22. First retaining ring; 23. First screw; 24. First connecting shaft; 25. Housing; 26. Bearing; 27. Guide wheel body; 28. Ball; 29. Second retaining ring; 210. Second screw; 3. Turntable assembly; 31. Loading platform; 32. Positioning sleeve; 33. First gear; 34. Ring track; 35. First positioning rod; 36. Turntable body; 37. Connecting seat; 38. Second gear; 39. First motor; 310. Slide; 4. Fork assembly; 41. Lower fork; 42. Middle fork; 43. Second motor; 44. Second connecting shaft; 45. First pulley; 46. Timing belt; 47. Second pulley; 48. Slide block; 49. Upper fork; 410. Guide rod; 411. First limiting plate; 412. Third connecting shaft; 413. Bush; 414. Trigger block; 415. Spring; 416. Second limiting plate; 417. Stopper; 418. Inclined plane; 419. Mounting bracket; 420. Roller; 421. Top plate; 422. Groove; 423. Second positioning rod; 424. Guide hole. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to the attached Figure 1 - attached Figure 9, an embodiment provided by the present invention: a lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering, including a mobile trolley 1. A plurality of guide wheel assemblies 2 are installed on the mobile trolley 1. The guide wheel assembly 2 includes a support 21, and the support 21 is fixedly connected to the lower surface of the mobile trolley 1. A first connecting shaft 24 is fixedly connected to the support 21. A bearing 26 is fixedly connected to the first connecting shaft 24. A guide wheel body 27 is fixedly connected to the bearing 26. A track 11 is provided at the bottom end of the mobile trolley 1, and the guide wheel body 27 is in rolling connection with the track 11. One end of the first connecting shaft 24 is fixedly connected to a housing 25, and the housing 25 is arranged on one side of the bearing 26. A ball 28 is in rolling connection in the housing 25, and the ball 28 is in rolling connection with the track 11. A second retaining ring 29 is sleeved on the ball 28, and the second retaining ring 29 is fixedly connected to the housing 25. The guide wheel body 27 of the guide wheel assembly 2 rolls on the side of the rail head, and the ball 28 rolls on the web of the rail. The bearing 26 is used to assist the rotation of the guide wheel body 27. The first connecting shaft 24 is used to install the bearing 26. The second retaining ring 29 is used to limit the ball 28; a first retaining ring 22 is arranged on the other side of the bearing 26, and the first retaining ring 22 is fixedly connected to the support 21. A first screw 23 is installed on the support 21, and the first screw 23 is threadedly connected to the first connecting shaft 24. A second screw 210 is installed on the second retaining ring 29, and the second screw 210 is threadedly connected to the housing 25. The inner ring of the bearing 26 is restricted by the first retaining ring 22 and the housing 25. The second retaining ring 29 is installed on the housing 25 through the second screw 210. The first connecting shaft 24 is installed on the support 21 through the first screw 23;A hoist body 12 is fixedly connected to the upper surface of the mobile trolley 1. A turntable assembly 3 is installed at the output end of the hoist body 12. The turntable assembly 3 includes a load platform 31, a positioning sleeve 32, a first gear 33, an annular track 34, a first positioning rod 35, a turntable body 36, a connecting seat 37, a second gear 38, a first motor 39 and a slide 310. The load platform 31 is fixedly connected to the output end of the hoist body 12. A positioning sleeve 32 is fixedly connected to the upper surface of the load platform 31. A first positioning rod 35 is sleeved in the positioning sleeve 32. The top end of the first positioning rod 35 is fixedly connected to the turntable body 36, and the turntable body 36 is rotatably connected to the load platform 31. A first gear 33 is fixedly connected to the load platform 31. A connecting seat 37 is fixedly connected to the turntable body 36. A plurality of second gears 38 are rotatably connected to the connecting seat 37, and the second gears 38 are meshed with the first gear 33. A first motor 39 is fixedly connected to the connecting seat 37, and the output end of the first motor 39 is fixedly connected to one of the second gears 38. The hoist body 12 is used to drive the turntable assembly 3 to lift. When the first motor 39 is started, it drives one of the second gears 38 to rotate. The second gear 38 rolls on the first gear 33 on the load platform 31. The connecting seat 37 on the second gear 38 rotates accordingly, and the turntable body 36 on the connecting seat 37 also rotates accordingly. At the same time, the first positioning rod 35 rotates in the positioning sleeve 32, and the first positioning rod 35 and the second gear 38 assist in supporting the turntable body 36. An annular track 34 is fixedly connected to the upper surface of the load platform 31. A plurality of slides 310 are evenly distributed on the lower surface of the turntable body 36, and the slides 310 are slidably connected to the annular track 34. The annular track 34 is used to install the slides 310, and the slides 310 are used to assist in supporting the turntable body 36;A forklift component 4 is installed on the turntable body 36. The forklift component 4 includes a lower fork 41, a middle fork 42, a second motor 43, a second connecting shaft 44, a first pulley 45, a synchronous belt 46, a second pulley 47, a slider 48, an upper fork 49, a guide rod 410, a first limit plate 411, a third connecting shaft 412, a sliding sleeve 413, a trigger block 414, a spring 415, a second limit plate 416, a stop block 417, an inclined surface 418, a mounting bracket 419, a roller 420, a top plate 421, a groove 422, a second positioning rod 423, and a guide hole 424. The lower fork 41 is fixedly connected to the turntable body 36. The middle fork 42 is slidably connected to the lower fork 41. The upper fork 49 is slidably connected to the middle fork 42. The second motor 43 is fixedly connected to the middle fork 42. The output end of the second motor 43 is fixedly connected to the second connecting shaft 44, and the second connecting shaft 44 is rotatably connected to the middle fork 42. The first pulley 45 is fixedly connected to the second connecting shaft 44. The synchronous belt 46 is drivingly connected to the first pulley 45. The second pulley 47 is drivingly connected to the synchronous belt 46, and the second pulley 47 is rotatably connected to the middle fork 42. The outer walls on both sides of the synchronous belt 46 are fixedly connected with sliders 48, and one of the sliders 48 is fixedly connected to the lower fork 41, and the other slider 48 is fixedly connected to the upper fork 49. When the second motor 43 is started, the first pulley 45 is driven by the second connecting shaft 44. The first pulley 45 drives the synchronous belt 46 to be driven on the second pulley 47. The synchronous belt 46 drives the upper fork 49 through the slider 48 on the upper fork 49, so that the upper fork 49 slides out along the middle fork 42. At the same time, since the slider 48 on the lower fork 41 is in a fixed state, the middle fork 42 will slide out along the lower fork 41. A guide rod 410 is arranged in the upper fork 49. Both ends of the guide rod 410 are fixedly connected with first limit plates 411. The third connecting shaft 412 is fixedly connected to the first limit plate 411, and the third connecting shaft 412 is rotatably connected to the upper fork 49. A sliding sleeve 413 is arranged on one side of the first limit plate 411, and the sliding sleeve 413 is slidably connected to the guide rod 410. Four trigger blocks 414 are evenly distributed on the sliding sleeve 413. A spring 415 is arranged on one side of the sliding sleeve 413, and the spring 415 is sleeved on the guide rod 410. The other end of the spring 415 is provided with a second limit plate 416, and the second limit plate 416 is fixedly connected to the guide rod 410. The trigger block 414 drives the guide rod 410 through the sliding sleeve 413. The guide rod 410 rotates on the upper fork 49 through the third connecting shaft 412. The mounting bracket 419 on the guide rod 410 also rotates accordingly. The second limit plate 416 cooperates with the sliding sleeve 413 to compress the spring 415. The spring 415 is used to provide a reset elastic force for the sliding sleeve 413. The first limit plate 411 is used to limit the sliding sleeve 413;A stop block 417 is fixedly connected to the position of the middle fork 42 corresponding to the trigger block 414 at the bottommost end. An inclined surface 418 is provided on one outer wall of the stop block 417. When the upper fork 49 and the middle fork 42 extend, the stop block 417 drives the trigger block 414, causing the sliding sleeve 413 to rotate. When the upper fork 49 and the middle fork 42 retract, the trigger block 414 is pushed by the inclined surface 418, causing the sliding sleeve 413 to slide; an installation frame 419 is fixedly connected to the guide rod 410, and rollers 420 are rotatably connected to both ends of the installation frame 419. The guide rod 410 is used to drive the installation frame 419, and the installation frame 419 is used to install the rollers 420; a top plate 421 is provided at the top of the upper fork 49, and a groove 422 is formed on the lower surface of the top plate 421 corresponding to the position of the guide rod 410. When the installation frame 419 rotates from the horizontal state to the vertical state, one of the rollers 420 will lift the top plate 421 until the roller 420 moves into the groove 422; second positioning rods 423 are fixedly connected to the four corners of the lower surface of the top plate 421, and guide holes 424 are formed on the upper fork 49 corresponding to the positions of the second positioning rods 423, and the second positioning rods 423 are slidably connected in the guide holes 424. The second positioning rods 423 cooperate with the guide holes 424 to guide the top plate 421.;

[0027] Working principle: When using the present invention, the mobile trolley 1 moves along the track 11, and the guide wheel assembly 2 is used for guiding and anti-tipping. The guide wheel body 27 of the guide wheel assembly 2 rolls on the side surface of the rail head, and the ball 28 rolls on the rail waist. The specific assembly method of the guide wheel assembly 2 is as follows: Install the guide wheel body 27 on the bearing 26, install the bearing 26 on the first connecting shaft 24, install the first connecting shaft 24 on the support 21 through the first screw 23, use the first retaining ring 22 and the housing 25 to limit the inner ring of the bearing 26, install the ball 28 in the housing 25, and install the second retaining ring 29 on the housing 25 through the second screw 210 to limit the ball 28; The hoist body 12 drives the turntable assembly 3 to lift and lower, and the fork assembly 4 on the turntable assembly 3 also rises and falls accordingly. The turntable assembly 3 can drive the fork assembly 4 to rotate, and its rotation range is 0° - 180°. Specifically: Start the first motor 39 to drive one of the second gears 38 to rotate. The second gear 38 rolls on the first gear 33 on the load platform 31, and the connecting seat 37 on the second gear 38 rotates accordingly. The turntable body 36 on the connecting seat 37 also rotates accordingly. At the same time, the slide 310 on the turntable body 36 slides on the ring rail 34, and the first positioning rod 35 rotates in the positioning sleeve 32. The first positioning rod 35, the second gear 38, and the slide 310 jointly support the turntable body 36;When the fork assembly 4 extends to the in-place position for the first time, it will push up the top plate 421, thus lifting the goods. When it retracts, it will maintain the upward-pushing posture. When the fork assembly 4 extends to the in-place position for the second time, it will cause the top plate 421 to fall back, thus lowering the goods. When it retracts, it will maintain the falling-back posture. Specifically: Start the second motor 43, drive the first pulley 45 through the second connecting shaft 44. The first pulley 45 drives the synchronous belt 46 to drive on the second pulley 47. The synchronous belt 46 drives the upper fork 49 through the slider 48 on the upper fork 49, so that the upper fork 49 slides out along the middle fork 42. At the same time, since the slider 48 on the lower fork 41 is in a fixed state, the middle fork 42 will slide out along the lower fork 41. During the extension process, the trigger block 414 is blocked by the stop block 417. The trigger block 414 drives the guide rod 410 through the sliding sleeve 413. The guide rod 410 rotates on the upper fork 49 through the third connecting shaft 412. After the trigger block 414 passes the stop block 417, the guide rod 410 rotates 90°. The mounting bracket 419 on the guide rod 410 also rotates 90° accordingly. The mounting bracket 419 rotates from the horizontal state to the vertical state, so that one of the rollers 420 lifts up the top plate 421. The top plate 421 moves upward along the guide hole 424 through the second positioning rod 423 until the roller 420 moves into the groove 422. When the second motor 43 reverses, it will drive the upper fork 49 and the middle fork 42 to retract to the original position. During this process, the trigger block 414 contacts the inclined surface 418 of the stop block 417 and is pushed by the inclined surface 418, so that the sliding sleeve 413 slides along the guide rod 410, and cooperates with the second limiting plate 416 to compress the spring 415. After the trigger block 414 leaves the stop block 417, the spring 415 pushes the trigger block 414 to reset. During this process, the trigger block 414 will not drive the sliding sleeve 413 to rotate. When the upper fork 49 and the middle fork 42 extend for the second time, the trigger block 414 will be blocked by the stop block 417, driving the sliding sleeve 413 to rotate 90° again, so that the mounting bracket 419 returns to the horizontal state, thus lowering the top plate 421; among them, the first limiting plate 411 is used to limit the sliding sleeve 413.;

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights involved.

Claims

1. A lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering, comprising a mobile trolley (1), characterized in that: A plurality of guide wheel assemblies (2) are installed on the mobile trolley (1). The guide wheel assembly (2) includes a support (21), and the support (21) is fixedly connected to the lower surface of the mobile trolley (1). A first connecting shaft (24) is fixedly connected to the support (21). A bearing (26) is fixedly connected to the first connecting shaft (24). A guide wheel body (27) is fixedly connected to the bearing (26). A track (11) is provided at the bottom end of the mobile trolley (1), and the guide wheel body (27) is in rolling connection with the track (11). One end of the first connecting shaft (24) is fixedly connected to a housing (25), and the housing (25) is arranged on one side of the bearing (26). A ball (28) is in rolling connection in the housing (25), and the ball (28) is in rolling connection with the track (11). A second retaining ring (29) is sleeved on the ball (28), and the second retaining ring (29) is fixedly connected to the housing (25).

2. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 1, characterized in that: A first retaining ring (22) is arranged on the other side of the bearing (26), and the first retaining ring (22) is fixedly connected to the support (21). A first screw (23) is installed on the support (21), and the first screw (23) is in threaded connection with the first connecting shaft (24). A second screw (210) is installed on the second retaining ring (29), and the second screw (210) is in threaded connection with the housing (25).

3. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 1, wherein: A hoist body (12) is fixedly connected to the upper surface of the mobile trolley (1). A turntable assembly (3) is installed at the output end of the hoist body (12). The turntable assembly (3) includes a load platform (31), a positioning sleeve (32), a first gear (33), an annular track (34), a first positioning rod (35), a turntable body (36), a connecting seat (37), a second gear (38), a first motor (39) and a sliding table (310). The load platform (31) is fixedly connected to the output end of the hoist body (12). A positioning sleeve (32) is fixedly connected to the upper surface of the load platform (31). A first positioning rod (35) is sleeved in the positioning sleeve (32). The top end of the first positioning rod (35) is fixedly connected to the turntable body (36), and the turntable body (36) is rotatably connected to the load platform (31). A first gear (33) is fixedly connected to the load platform (31). A connecting seat (37) is fixedly connected to the turntable body (36). A plurality of second gears (38) are rotatably connected to the connecting seat (37), and the second gears (38) are meshed with the first gear (33). A first motor (39) is fixedly connected to the connecting seat (37), and the output end of the first motor (39) is fixedly connected to one of the second gears (38).

4. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 3, characterized in that: An annular track (34) is fixedly connected to the upper surface of the load platform (31). A plurality of sliding tables (310) are evenly distributed on the lower surface of the turntable body (36), and the sliding tables (310) are in sliding connection with the annular track (34).

5. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 4, characterized in that: A fork assembly (4) is installed on the turntable body (36). The fork assembly (4) includes a lower fork (41), a middle fork (42), a second motor (43), a second connecting shaft (44), a first pulley (45), a synchronous belt (46), a second pulley (47), a slider (48), an upper fork (49), a guide rod (410), a first limiting plate (411), a third connecting shaft (412), a sliding sleeve (413), a trigger block (414), a spring (415), a second limiting plate (416), a stop block (417), an inclined surface (418), a mounting bracket (419), a roller (420), a top plate (421), a groove (422), a second positioning rod (423) and a guide hole (424). The lower fork (41) is fixedly connected to the turntable body (36). The middle fork (42) is slidably connected to the lower fork (41). The upper fork (49) is slidably connected to the middle fork (42). The second motor (43) is fixedly connected to the middle fork (42). The output end of the second motor (43) is fixedly connected to the second connecting shaft (44). The second connecting shaft (44) is rotatably connected to the middle fork (42). The first pulley (45) is fixedly connected to the second connecting shaft (44). The synchronous belt (46) is drivingly connected to the first pulley (45). The second pulley (47) is drivingly connected to the synchronous belt (46). The second pulley (47) is rotatably connected to the middle fork (42). The sliders (48) are fixedly connected to the outer walls on both sides of the synchronous belt (46). One of the sliders (48) is fixedly connected to the lower fork (41), and the other slider (48) is fixedly connected to the upper fork (49).

6. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 5, characterized in that: The guide rod (410) is arranged inside the upper fork (49). The first limiting plates (411) are fixedly connected to both ends of the guide rod (410). The third connecting shaft (412) is fixedly connected to the first limiting plate (411). The third connecting shaft (412) is rotatably connected to the upper fork (49). A sliding sleeve (413) is arranged on one side of the first limiting plate (411). The sliding sleeve (413) is slidably connected to the guide rod (410). Four trigger blocks (414) are evenly distributed on the sliding sleeve (413). A spring (415) is arranged on one side of the sliding sleeve (413). The spring (415) is sleeved on the guide rod (410). The other end of the spring (415) is provided with the second limiting plate (416). The second limiting plate (416) is fixedly connected to the guide rod (410).

7. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 5, wherein: The stop block (417) is fixedly connected to the middle fork (42) at a position corresponding to the lowermost trigger block (414). An inclined surface (418) is arranged on the outer wall of one side of the stop block (417).

8. An elevating mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 6, characterized in that: The mounting bracket (419) is fixedly connected to the guide rod (410). The rollers (420) are rotatably connected to both ends of the mounting bracket (419).

9. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 6, wherein: The top plate (421) is arranged at the top of the upper fork (49). Grooves (422) are formed in the lower surface of the top plate (421) at positions corresponding to the guide rod (410).

10. The lifting mechanism for a three-dimensional intelligent warehouse capable of automatic steering according to claim 9, characterized in that: Four corners of the lower surface of the top plate (421) are fixedly connected with second positioning rods (423), and guiding holes (424) are formed at positions corresponding to the second positioning rods (423) on the upper fork (49), and the second positioning rods (423) are slidably connected in the guiding holes (424).

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