Double-layer EMS air conveying device and working method thereof

Abstract

The invention discloses a double-layer EMS air conveying device and a working method thereof, and relates to the field of conveying, the double-layer EMS air conveying device comprises a double-layer vertical frame and an EMS conveying trolley, the two ends of the upper portion and the two ends of the lower portion of the EMS conveying trolley are each provided with a single-rail mechanism, and the four single-rail mechanisms are divided into the upper portion and the lower portion and are fixedly installed in the double-layer vertical frame. Four sets of servo motors control starting at the same time and synchronously drive the driving belt wheels connected with the servo motors to rotate, under the cooperation effect of the auxiliary belt wheels, belts are wound around the driving belt wheels and the auxiliary belt wheels, the belts are driven to rotate after the driving belt wheels rotate, and the four sets of belts synchronously rotate to drive the first magnet strips attached to the belts to move. And the four groups of first magnet strips are also divided into upper and lower parts, so that the upper and lower ends of the EMS conveying trolley are simultaneously stressed for conveying, the deflection tendency caused by different stress on the upper and lower ends is avoided, and the workpiece conveying stability of the EMS conveying trolley is ensured.

Description

Technical Field

[0001] The invention relates to the field of transportation technology, in particular to a double-layer EMS aerial transportation device and a working method thereof. Background Art

[0002] The EMS conveyor line is a conveying system that uses a single electrically driven trolley running on a track. This system is usually used to transport equipment and parts within or between workshops, and is particularly suitable for production environments that require precise positioning and rapid handling.

[0003] For example, Chinese patent CN111056246A discloses an EMS double-layer aerial transport system, including an upper circular track, a lower circular track, a maintenance track and an EMS transport trolley, wherein the EMS transport trolley can switch between the upper circular track and the lower circular track through a vertical track switching mechanism, and the EMS transport trolley can switch between the upper circular track and the maintenance track through a horizontal track switching mechanism.

[0004] However, in the prior art, the EMS transport trolley has a certain height. When the existing device transports the EMS transport trolley, only the upper end receives the transmission power, resulting in uneven force on the upper and lower ends of the entire EMS transport trolley during movement. There is a tendency for the upper and lower ends to shift in position, which can easily cause the workpiece inside the trolley to fall. Summary of the invention

[0005] The object of the present invention is to provide a double-layer EMS aerial transport device and a working method thereof to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-layer EMS aerial transport device, comprising a double-layer stand and an EMS transport trolley, wherein both upper and lower ends of the EMS transport trolley are provided with monorail mechanisms, four groups of the monorail mechanisms are divided into upper and lower parts and are fixedly installed inside the double-layer stand, and the middle positions of the two groups of the monorail mechanisms located at the lower part are fixedly connected with a lifting mechanism and a parking mechanism, the monorail mechanism comprises a long profile and a transmission assembly, the long profile is spliced ​​and installed in multiple pieces according to the transport length, and the transmission assembly is in multiple pieces and is installed on the inner side of the long profile The transmission assembly includes an auxiliary pulley, a second magnet bar, a belt, a servo motor and a driving pulley, the driving pulley is fixedly installed at the output end of the servo motor, the belt is connected to the driving pulley through multiple groups of auxiliary pulleys, the belt is located on the inner side of the long profile, the second magnet bar is fixedly connected to the inner side of the long profile, and the second magnet bar is located on the inner side of the belt, multiple edges of the EMS conveyor trolley are provided with first magnet bars, a group of the first magnet bars and a group of the second magnet bars are located on the same vertical line and the two are arranged up and down in the form of like poles repelling each other.

[0007] Preferably, the servo motor is fixedly connected to the lower side of the long profile, and the plurality of auxiliary pulleys are rotatably mounted on the long profile and the servo motor mounting member in a symmetrical manner.

[0008] Preferably, the vehicle lifting mechanism and the parking mechanism are simultaneously installed on the lower side of the long profile and the installation positions are set according to actual needs.

[0009] Preferably, the parking mechanism includes a transverse plate, a second electric cylinder, a sleeve, a slide rod, a mounting seat, a triangular block, a roller and a third electric cylinder, and the second electric cylinder is fixedly mounted in the middle of the transverse plate.

[0010] Preferably, a plurality of sets of track grooves are respectively provided at both ends of the transverse plate, and the transverse plate is fixedly connected to the lower side of the long profile by means of bolts through the track grooves.

[0011] Preferably, the sleeve is fixedly connected to the upper end of the movable rod of the second electric cylinder, the slide bar is fixedly connected to the upper edge of the second electric cylinder, the mounting seat is fixedly connected to the upper side of the sleeve, and the edge of the mounting seat is slidably engaged with the slide bar.

[0012] Preferably, the third electric cylinder is installed inside the sleeve and passes through the middle of the mounting seat, the triangular block is rotatably connected to one end of the upper side of the mounting seat, the roller is rotatably connected to one corner of the triangular block, and the movable rod of the third electric cylinder is movably connected to the other corner of the triangular block.

[0013] Preferably, the vehicle lifting mechanism comprises a cross frame, a column, a push plate and a first electric cylinder, the cross frame is fixedly connected to the lower side of the long profile, and the first electric cylinder is fixedly connected to the middle of the cross frame.

[0014] Preferably, the push plate is arranged parallel to the top of the horizontal frame, the movable rod of the first electric cylinder is fixedly connected to the middle part of the lower side of the push plate, and the four groups of columns are respectively fixedly connected to the four corners of the push plate.

[0015] A working method of a double-layer EMS aerial transport device comprises the following steps:

[0016] S1. Customize the double-layer stand and long profiles according to the conveying distance, install the upper end of the double-layer stand on the supporting carrier, and divide the four groups of long profiles into upper and lower parts, which are respectively installed on the upper and lower layers of the double-layer stand. Arrange the position and quantity of the lifting mechanism and parking mechanism according to the actual operation requirements;

[0017] S2, four groups of servo motors are controlled to start at the same time, synchronously driving the connected active pulleys to rotate, and the four groups of belts rotate synchronously to drive the first magnet strips that are attached to them to move, and the four groups of first magnet strips are also divided into upper and lower parts, so that the upper and lower ends of the EMS conveyor trolley are simultaneously subjected to force for conveying;

[0018] S3, the four transmission components stop working, the second and third electric cylinders are started, the rollers are driven to rise, the rollers block the lower plate of the EMS conveyor trolley, the EMS conveyor trolley is parked, and loading and unloading operations are performed;

[0019] S4, control the first electric cylinder to start, and the push plate drives the four corner columns to rise vertically upward, so that the first magnet bar is out of contact with the belt, so that the operation on the EMS conveyor trolley does not affect the conveying of other EMS conveyor trolleys.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, a double-layer stand and long profiles are customized according to the conveying distance, and the upper end of the double-layer stand is installed on the supporting carrier. The four groups of long profiles are divided into upper and lower parts, which are respectively installed on the upper and lower layers of the double-layer stand. The four edges of the EMS conveying trolley are installed with first magnet strips, the first magnet strips are attached to the upper side of the belt, the second magnet strips are located on the inner side of the belt, and a group of first magnet strips and a group of second magnet strips are located on the same vertical line. Four groups of servo motors are controlled to start at the same time, and synchronously drive the connected active pulleys to rotate. Under the cooperation of multiple groups of auxiliary pulleys, the belts are wound around the active pulleys and the multiple groups of auxiliary pulleys, and the belts are driven to rotate after the active pulleys rotate. After the four groups of belts rotate synchronously, they drive the first magnet strips attached to each other to move, and the four groups of first magnet strips are also divided into upper and lower parts. Therefore, the upper and lower ends of the EMS conveying trolley are subjected to force at the same time to convey, avoiding the tendency of deflection due to different forces on the upper and lower ends, thereby ensuring the stability of the EMS conveying trolley in conveying workpieces.

[0022] 2. In the present invention, four groups of transmission components stop working. At this time, the EMS conveying trolley slides under the action of inertia, and the second electric cylinder is started. The movable rod of the second electric cylinder extends upward and pushes the sleeve, thereby applying an upward force to the mounting seat, and the mounting seat moves upward along the sliding rod. At the same time, the movable rod of the third electric cylinder contracts downward and pulls a corner of the triangular block. The triangular block rotates around the connection point with the mounting seat, and the remaining corner drives the roller to rise. The roller blocks the lower plate of the EMS conveying trolley, thereby realizing the parking of the EMS conveying trolley and performing loading and unloading operations, thereby avoiding the movement of the EMS conveying trolley during loading and unloading.

[0023] 3. In the present invention, by controlling the first electric cylinder to start, its movable rod extends upward to push the push plate, and the push plate drives the columns at the four corners to rise vertically upward. The columns are inserted into the grooves at the bottom of the EMS conveying trolley, so that the first magnet bar is disengaged from the belt, and the operation on the EMS conveying trolley does not affect the conveying of other EMS conveying trolleys, ensuring that multiple EMS conveying trolleys can be transported and operated independently, and can also be transported simultaneously, thereby improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a double-layer EMS aerial transport device of the present invention;

[0025] Figure 2 A plan view of a part of a double-layer EMS aerial transport device of the present invention;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the positional relationship between the monorail mechanism and the EMS transport trolley in a double-layer EMS aerial transport device of the present invention;

[0027] Figure 4It is a first three-dimensional structural schematic diagram of a monorail mechanism in a double-layer EMS aerial transport device of the present invention;

[0028] Figure 5 It is a second three-dimensional structural schematic diagram of a monorail mechanism in a double-layer EMS aerial transport device of the present invention;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of a vehicle lifting mechanism in a double-layer EMS aerial transport device of the present invention;

[0030] Figure 7 The figure is a three-dimensional structural schematic diagram of a parking mechanism in a double-layer EMS aerial transport device of the present invention.

[0031] In the figure: 1. Double-layer frame; 2. EMS transport trolley; 21. First magnet strip; 3. Monorail mechanism; 31. Long profile; 32. Auxiliary pulley; 33. Second magnet strip; 34. Belt; 35. Servo motor; 36. Active pulley; 4. Lifting mechanism; 41. Cross frame; 42. Column; 43. Push plate; 44. First electric cylinder; 5. Parking mechanism; 51. Cross plate; 52. Runway groove; 53. Second electric cylinder; 54. Sleeve; 55. Sliding rod; 56. Mounting seat; 57. Triangle block; 58. Roller; 59. Third electric cylinder. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Reference Figure 1-Figure 7As shown: a double-layer EMS aerial conveying device, including a double-layer stand 1 and an EMS conveying trolley 2, both upper and lower ends of the EMS conveying trolley 2 are provided with monorail mechanisms 3, four sets of monorail mechanisms 3 are divided into upper and lower parts and are fixedly installed inside the double-layer stand 1, and the middle position of the two sets of monorail mechanisms 3 located at the lower part is fixedly connected with a car lifting mechanism 4 and a parking mechanism 5, the monorail mechanism 3 includes a long profile 31 and a transmission assembly, the long profile 31 is spliced ​​and installed in multiple pieces according to the conveying length, the number of transmission assemblies is plural and is installed on the inner side of the long profile 31, the transmission assembly includes an auxiliary pulley 32, a second magnet strip 33, a belt 34, a servo motor 35 and a driving pulley 36, the main The driven pulley 36 is fixedly installed at the output end of the servo motor 35, and the belt 34 is connected to the driving pulley 36 through multiple sets of auxiliary pulleys 32. The belt 34 is located on the inner side of the long profile 31, and the second magnet bar 33 is fixedly connected to the inner side of the long profile 31, and the second magnet bar 33 is located on the inner side of the belt 34. Multiple edges of the EMS conveyor trolley 2 are provided with first magnet bars 21, a group of first magnet bars 21 and a group of second magnet bars 33 are located on the same vertical line and the two are arranged up and down in the form of like poles repelling each other, the servo motor 35 is fixedly connected to the lower side of the long profile 31, and multiple auxiliary pulleys 32 are rotatably installed on the long profile 31 and the servo motor 35 mounting parts in a symmetrical manner.

[0034] In this embodiment, a double-layer stand 1 and a long profile 31 are customized according to the conveying distance, the upper end of the double-layer stand 1 is installed on the supporting carrier, and the four groups of long profiles 31 are divided into upper and lower parts, which are respectively installed on the upper and lower layers of the double-layer stand 1. The four edges of the EMS conveying trolley 2 are all installed with a first magnet bar 21, the first magnet bar 21 is attached to the upper side of the belt 34, the second magnet bar 33 is located on the inner side of the belt 34, and a group of first magnet bars 21 and a group of second magnet bars 33 are located on the same vertical line. At the same time, the gravity of the EMS conveying trolley 2 is greater than the repulsive force between the first magnet bar 21 and the belt 34, so as to ensure that the downward force exerted by the first magnet bar 21 on the belt 34 is generated. The friction force generated can drive the EMS conveyor trolley 2 to move, and the four groups of servo motors 35 are controlled to start at the same time, and synchronously drive the connected active pulleys 36 to rotate. Under the cooperation of multiple groups of auxiliary pulleys 32, the belt 34 is wound around the active pulley 36 and the multiple groups of auxiliary pulleys 32. After the active pulley 36 rotates, it drives the belt 34 to rotate. After the four groups of belts 34 rotate synchronously, they drive the first magnet strips 21 that are attached to each other to move, and the four groups of first magnet strips 21 are also divided into two parts, the upper and lower parts. Therefore, the upper and lower ends of the EMS conveyor trolley 2 are subjected to force at the same time for conveying, avoiding the tendency of deflection due to different forces on the upper and lower ends, and ensuring the stability of the EMS conveyor trolley 2 in conveying workpieces.

[0035] Embodiment 2: According to Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the car lifting mechanism 4 and the parking mechanism 5 are simultaneously installed on the lower side of the long profile 31 and the installation position is set according to actual needs. The parking mechanism 5 includes a cross plate 51, a second electric cylinder 53, a sleeve 54, a slide bar 55, a mounting seat 56, a triangular block 57, a roller 58 and a third electric cylinder 59. The second electric cylinder 53 is fixedly installed in the middle of the cross plate 51. Two ends of the cross plate 51 are respectively provided with a plurality of runway grooves 52. The cross plate 51 is fixedly connected to the lower side of the long profile 31 by means of bolts through the runway grooves 52. The sleeve 54 It is fixedly connected to the upper end of the movable rod of the second electric cylinder 53, the sliding rod 55 is fixedly connected to the upper edge of the second electric cylinder 53, the mounting seat 56 is fixedly connected to the upper side of the sleeve 54, the edge of the mounting seat 56 is slidably engaged with the sliding rod 55, the third electric cylinder 59 is installed inside the sleeve 54 and passes through the middle of the mounting seat 56, the triangular block 57 is rotatably connected to one end of the upper side of the mounting seat 56, the roller 58 is rotatably connected to one corner of the triangular block 57, and the movable rod of the third electric cylinder 59 is movably connected to the other corner of the triangular block 57.

[0036] In this embodiment, the position and number of the parking mechanisms 5 are arranged according to actual operational requirements. When parking is required at a certain place, the four transmission components stop working. At this time, the EMS conveying trolley 2 slides under the action of inertia, and the second electric cylinder 53 is started. The movable rod of the second electric cylinder 53 extends upward and pushes the sleeve 54, thereby applying an upward force to the mounting seat 56. The mounting seat 56 moves upward along the slide rod 55. At the same time, the movable rod of the third electric cylinder 59 contracts downward and pulls a corner of the triangular block 57. The triangular block 57 rotates around the connection point with the mounting seat 56, and the remaining corner drives the roller 58 to rise. The roller 58 blocks the lower plate of the EMS conveying trolley 2, thereby realizing the parking of the EMS conveying trolley 2 and performing loading and unloading operations, thereby avoiding the movement of the EMS conveying trolley 2 during loading and unloading.

[0037] Embodiment 3: According to Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the car lifting mechanism 4 includes a cross frame 41, a column 42, a push plate 43 and a first electric cylinder 44. The cross frame 41 is fixedly connected to the lower side of the long profile 31, the first electric cylinder 44 is fixedly connected to the middle of the cross frame 41, the push plate 43 is arranged parallel to the top of the cross frame 41, the movable rod of the first electric cylinder 44 is fixedly connected to the lower middle part of the push plate 43, and the four groups of columns 42 are fixedly connected to the four corners of the push plate 43 respectively.

[0038] In this embodiment, the position and number of the lifting mechanism 4 are arranged according to actual operation requirements, and the first electric cylinder 44 is controlled to start, and its movable rod extends upward to push the push plate 43. The push plate 43 drives the four corner columns 42 to rise vertically upward, and the columns 42 are inserted into the groove at the bottom of the EMS conveying trolley 2, so that the first magnet bar 21 is out of contact with the belt 34, so that operation on the EMS conveying trolley 2 will not affect the conveyance of other EMS conveying trolleys 2, ensuring that multiple EMS conveying trolleys 2 can be transported and operated independently, and can also be transported simultaneously, thereby improving applicability.

[0039] The use method and working principle of the device are as follows: a double-layer stand 1 and a long profile 31 are customized according to the conveying distance, the upper end of the double-layer stand 1 is installed on the supporting carrier, and the four groups of long profiles 31 are divided into upper and lower parts, which are respectively installed on the upper and lower layers of the double-layer stand 1. The four edges of the EMS conveying trolley 2 are all installed with a first magnet bar 21, the first magnet bar 21 is attached to the upper side of the belt 34, the second magnet bar 33 is located on the inner side of the belt 34, and a group of the first magnet bar 21 and a group of the second magnet bar 33 are located on the same vertical line, and the four groups of servo motors 3 5. The control starts at the same time, and synchronously drives the connected driving pulleys 36 to rotate. Under the cooperation of the multiple sets of auxiliary pulleys 32, the belt 34 is wound around the driving pulley 36 and the multiple sets of auxiliary pulleys 32. After the driving pulley 36 rotates, the belt 34 is driven to rotate. After the four sets of belts 34 rotate synchronously, they drive the first magnet strips 21 that are attached to each other to move. The four sets of first magnet strips 21 are also divided into upper and lower parts. Therefore, the upper and lower ends of the EMS conveying trolley 2 are subjected to force at the same time to convey, avoiding the tendency of deflection due to different forces on the upper and lower ends;

[0040] The positions and numbers of the lifting mechanism 4 and the parking mechanism 5 are arranged according to the actual operation requirements. When parking is required at a certain place, the four transmission components stop working. At this time, the EMS conveying trolley 2 slides under the action of inertia, and the second electric cylinder 53 is started. The movable rod of the second electric cylinder 53 extends upward and pushes the sleeve 54, thereby applying an upward force to the mounting seat 56. The mounting seat 56 moves upward along the slide rod 55. At the same time, the movable rod of the third electric cylinder 59 contracts downward and pulls one corner of the triangular block 57. The triangular block 57 rotates around the connection point with the mounting seat 56, and the remaining corner drives the roller 58 to be lifted. The roller 58 blocks the lower plate of the EMS conveying trolley 2, so that the EMS conveying trolley 2 can be parked and the loading and unloading operations can be performed.

[0041] Finally, the first electric cylinder 44 is controlled to start, and its movable rod extends upward to push the push plate 43. The push plate 43 drives the four corner columns 42 to rise vertically upward. The columns 42 are inserted into the grooves at the bottom of the EMS conveying trolley 2, so that the first magnet bar 21 is out of contact with the belt 34, so that the operation on the EMS conveying trolley 2 will not affect the conveying of other EMS conveying trolleys 2.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer EMS aerial transport device, comprising a double-layer stand (1) and an EMS transport trolley (2), characterized in that: The EMS transport trolley (2) is provided with a monorail mechanism (3) at both ends of the upper part and the lower part. The four groups of the monorail mechanism (3) are divided into upper and lower parts and are fixedly installed inside the double-layer stand (1). The middle position of the two groups of the monorail mechanism (3) located at the lower part is fixedly connected with a lifting mechanism (4) and a parking mechanism (5). The monorail mechanism (3) includes a long profile (31) and a transmission assembly. The long profile (31) is spliced ​​and installed in multiple pieces according to the conveying length. The transmission assembly is in multiple numbers and is installed on the inner side of the long profile (31). The transmission assembly includes an auxiliary pulley (32), a second magnet bar (33), a belt (34), a servo motor (35) and an active The EMS conveying trolley (2) is provided with a first magnet bar (21) on multiple edges, a group of the first magnet bar (21) and a group of the second magnet bar (33) are located on the same vertical line, and the two groups of the first magnet bar (21) and the second magnet bar (33) are arranged up and down in a manner that the same poles repel each other.

2. A double-layer EMS aerial transport device according to claim 1, characterized in that: The servo motor (35) is fixedly connected to the lower side of the long profile (31), and the plurality of auxiliary pulleys (32) are rotatably mounted on the long profile (31) and the servo motor (35) mounting member in a symmetrical manner.

3. A double-layer EMS aerial transport device according to claim 2, characterized in that: The vehicle lifting mechanism (4) and the parking mechanism (5) are simultaneously installed on the lower side of the long profile (31), and the installation positions are set according to actual needs.

4. A double-layer EMS aerial transport device according to claim 3, characterized in that: The parking mechanism (5) comprises a transverse plate (51), a second electric cylinder (53), a sleeve (54), a sliding rod (55), a mounting seat (56), a triangular block (57), a roller (58) and a third electric cylinder (59), wherein the second electric cylinder (53) is fixedly mounted at the middle of the transverse plate (51).

5. A double-layer EMS aerial transport device according to claim 4, characterized in that: A plurality of track grooves (52) are respectively formed at both ends of the transverse plate (51), and the transverse plate (51) is fixedly connected to the lower side of the long profile (31) via the track grooves (52) by means of bolts.

6. A double-layer EMS aerial transport device according to claim 5, characterized in that: The sleeve (54) is fixedly connected to the upper end of the movable rod of the second electric cylinder (53), the sliding rod (55) is fixedly connected to the upper edge of the second electric cylinder (53), the mounting seat (56) is fixedly connected to the upper side of the sleeve (54), and the edge of the mounting seat (56) is slidably engaged with the sliding rod (55).

7. A double-layer EMS aerial transport device according to claim 6, characterized in that: The third electric cylinder (59) is installed inside the sleeve (54) and passes through the middle of the mounting seat (56); the triangular block (57) is rotatably connected to one end of the upper side of the mounting seat (56); the roller (58) is rotatably connected to one corner of the triangular block (57); and the movable rod of the third electric cylinder (59) is movably connected to the other corner of the triangular block (57).

8. A double-layer EMS aerial transport device according to claim 7, characterized in that: The vehicle lifting mechanism (4) comprises a cross frame (41), a column (42), a push plate (43) and a first electric cylinder (44); the cross frame (41) is fixedly connected to the lower side of the long profile (31); and the first electric cylinder (44) is fixedly connected to the middle part of the cross frame (41).

9. A double-layer EMS aerial transport device according to claim 8, characterized in that: The push plate (43) is arranged parallel to the top of the horizontal frame (41), the movable rod of the first electric cylinder (44) is fixedly connected to the middle part of the lower side of the push plate (43), and the four groups of columns (42) are respectively fixedly connected to the four corners of the push plate (43).

10. A method for operating a double-layer EMS aerial transport device, using a double-layer EMS aerial transport device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Customize the double-layer stand (1) and the long profile (31) according to the conveying distance, install the upper end of the double-layer stand (1) on the supporting carrier, divide the four groups of long profiles (31) into upper and lower parts, and install them on the upper and lower layers of the double-layer stand (1) respectively, and arrange the position and quantity of the lifting mechanism (4) and the parking mechanism (5) according to the actual operation requirements; S2, four groups of servo motors (35) are controlled to start at the same time, synchronously driving the driving pulleys (36) connected to them to rotate, and the four groups of belts (34) rotate synchronously to drive the first magnet strips (21) attached to them to move, and the four groups of first magnet strips (21) are also divided into upper and lower parts, so that the upper and lower ends of the EMS conveying trolley (2) are simultaneously subjected to force for conveying; S3, the four transmission components stop working, the second electric cylinder (53) and the third electric cylinder (59) are started, and the roller (58) is driven to rise, and the roller (58) blocks the lower plate of the EMS conveying trolley (2), so that the EMS conveying trolley (2) is parked and loading and unloading operations are performed; S4, control the first electric cylinder (44) to start, and the push plate (43) drives the four corner columns (42) to rise vertically upward, so that the first magnet bar (21) and the belt (34) are out of contact, and the operation on the EMS transport trolley (2) is achieved without affecting the transport of other EMS transport trolleys (2).

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