Full-automatic coiling device for cold-rolled steel strip

Abstract

The invention discloses a full-automatic cold-rolled steel strip coiling device, and relates to the technical field of cold-rolled steel strips, the full-automatic cold-rolled steel strip coiling device comprises an uncoiler main body and a coiling block, the front end of the uncoiler main body is rotatably connected with the coiling block, and a positioning device is arranged on the outer wall of the uncoiler main body; a sweeping board is arranged on one side of the uncoiler body, and a height adjusting device is arranged at the upper end of the sweeping board. Through cooperation of the positioning device and the trolley plate, the inserting rod is attached to the electromagnet, meanwhile, the electromagnet is powered on, the electromagnet can attract the inserting rod, the trolley plate can be stably connected with the uncoiler body, and under the effect of an arc on the surface of the supporting plate, a steel coil can be placed in the middle and can be located on the same straight line with a coiling block; and the vehicle plate and the uncoiler main body can be aligned, so that the uncoiler is more convenient to mount.

Description

Technical Field

[0001] The invention relates to the technical field of cold-rolled steel strips, in particular to a fully automatic coiling device for cold-rolled steel strips. Background Art

[0002] Cold rolled steel strip is made of hot rolled coils and rolled at room temperature below the recrystallization temperature. It includes plates and coils. Many domestic steel mills such as Baosteel, Wuhan Iron and Steel, Anshan Iron and Steel, etc. can produce them. The ones delivered in sheets are called steel plates, also called box plates or flat plates; the ones delivered in long lengths in coils are called steel strips, also called coils. When the steel coils are used, the unwinder is required to unwind the steel coils.

[0003] First of all, when the existing uncoiler is in use, it needs to be transported in a variety of ways so that the steel coil can be put on the drum surface of the uncoiler. However, in the existing technology, it is not convenient to quickly match the steel coil with the uncoiler, which makes it inconvenient to install the steel coil in the existing technology.

[0004] At the same time, when the existing uncoiler is in use, it is not convenient to quickly and accurately center the inner hole of the steel coil and the drum part of the uncoiler to be coaxial, resulting in a long installation time required to complete the installation and placement of the steel coil when the device is in use, resulting in low efficiency of the existing equipment during installation.

[0005] Secondly, when the existing uncoiler is in use, it is not convenient to accurately adjust the height of the steel coil, which makes the device inconvenient to install and reduces the practicality of the existing equipment when in use. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art that it is inconvenient to align steel coils, resulting in inconvenience in installation, inconvenience in coaxial positioning, reduced work efficiency and reduced practicality due to inconvenient installation, and to propose a fully automatic coiling device for cold-rolled steel strip.

[0007] To achieve the above object, the present invention provides the following technical solutions: A fully automatic coiling device for cold-rolled steel strip is designed, comprising an uncoiler body and a reel, the front end of the uncoiler body is rotatably connected to the reel, a positioning device is provided on the outer wall of the uncoiler body, a car plate is provided on one side of the uncoiler body, a height adjustment device is provided on the upper end of the car plate, a support plate is provided above the car plate, and a docking device is provided at the lower end of the support plate.

[0008] Preferably, the height adjustment device comprises a first hydraulic cylinder, a support ring, and a round rod; The first hydraulic cylinder is fixedly connected to the vehicle plate, the lower ends of the multiple groups of support rings are fixedly connected to the vehicle plate, the inner walls of the support rings are slidably connected to multiple round rods, and the lower ends of the multiple round rods are in contact with the vehicle plate.

[0009] Preferably, the upper ends of the plurality of groups of round rods are fixedly connected to a support plate, and the lower end of the support plate is fixedly connected to the telescopic end of the first hydraulic cylinder.

[0010] Preferably, the lower end of the vehicle plate is fixedly connected to a plurality of wheel frames, and the plurality of wheel frames are rotatably connected to the rotating shafts of the plurality of wheels via bearings, and a battery is installed at the lower end of the vehicle plate.

[0011] Preferably, the inner wall of the uncoiler body is fixedly connected to a bottom plate, the upper end of the bottom plate is fixedly connected to a second hydraulic cylinder, the telescopic end of the second hydraulic cylinder is fixedly connected to a cross plate, and the upper end of the cross plate is rotatably connected to the rotating shafts of the two rollers through bearings.

[0012] Preferably, a plurality of baffles are fixedly connected to the outer wall of the reel, and a controller is fixedly connected to the upper end of the vehicle plate.

[0013] Preferably, a bracket is fixedly connected to the upper end of the vehicle plate, an inner wall of the bracket is connected to the third hydraulic cylinder, and a telescopic end of the third hydraulic cylinder is fixedly connected to the push plate.

[0014] Preferably, the positioning device comprises a square plate, a first support arm, a second support arm, an electromagnet, a plunger and a cylinder; The upper ends of the square plates on both sides are fixedly connected to the car plate, one end of the square plates on both sides is fitted with the uncoiler body, one end of the insertion rod is fixedly connected to the protruding part of the car plate, the other end of the insertion rod is plugged into the cylinder, the outer wall of the cylinder is fixedly connected to the first support arm, both ends of the first support arm are fixedly connected to the uncoiler body, one end of the cylinder is fixedly connected to an electromagnet, the outer wall of the electromagnet is fixedly connected to the second support arm, and both ends of the second support arm are fixedly connected to the uncoiler body.

[0015] Preferably, the docking device comprises a rotating plate, a right-angle plate, a round bar, a round plate, a spring, a hook and a servo motor; The servo motor is fixedly connected to the vehicle plate through a motor frame, the output shaft of the servo motor is fixedly connected to the rotating plate, the upper end of the rotating plate is slidably connected to a round rod, one end of the round rod is fixedly connected to the round plate, one end of the rotating plate is fixedly connected to a right-angle plate, one end of the right-angle plate and the rotating plate are respectively fixedly connected to two ends of a spring, one end of the spring passes through the rotating plate through a through hole opened on the surface of the rotating plate, and the upper end of the hook is fixedly connected to the vehicle plate.

[0016] The invention proposes a fully automatic coiling device for cold-rolled steel strip, which has the beneficial effects of: through the cooperation of the positioning device and the car plate, the operator cooperates through the controller and the battery to make the four sets of wheels rotate under the action of the driving motor, so that the four sets of wheels can drive the car plate to move, so that the car plate can drive the steel coil to be transported, and the four sets of wheels drive the insertion rod to be inserted into the interior of the cylinder. When the square plates on both sides are moved to fit with the front end of the uncoiler body, the wheels are stopped, the insertion rod is fit with the electromagnet, and the electromagnet is energized at the same time, so that the electromagnet can adsorb the insertion rod, so that the car plate can be stably connected to the uncoiler body, and under the action of the arc on the surface of the support plate, the steel coil can be placed in the center, so that the steel coil can be in the same straight line with the reel, and the car plate and the uncoiler body can be aligned, so that the invention is more convenient to install.

[0017] Through the cooperation of the height adjustment device, the docking device and the support plate, the support plate can drive the steel coil and the round rod to move upward synchronously. When the round rod moves to contact one end of the reel, the round rod will move to one side, so that the round rod can drive the circular plate to stretch the spring, and at the same time, the pressure sensor inside the round rod will be subjected to pressure. When the round rod moves to correspond to the groove on one side of the reel, the round rod can be inserted into the groove of the reel under the push of the spring. At this time, the pressure sensor inside the round rod is no longer subjected to pressure, and the telescopic end of the first hydraulic cylinder is controlled by the controller to no longer extend, so as to complete the docking with the steel coil and the reel. By aligning the steel coil and the reel, the present invention can be more convenient during installation, save time, and improve installation efficiency.

[0018] Through the cooperation of the height adjustment device, the docking device and the support plate, the support plate can drive the steel coil and the round rod to move upward synchronously. When the round rod moves to contact one end of the reel, the round rod will move to one side, so that the round rod can drive the circular plate to stretch the spring, and at the same time, the pressure sensor inside the round rod will be subjected to pressure. When the round rod moves to correspond to the groove on one side of the reel, the round rod can be inserted into the groove of the reel under the push of the spring. At this time, the pressure sensor inside the round rod is no longer subjected to pressure, and the telescopic end of the first hydraulic cylinder is controlled by the controller to no longer extend, so as to complete the docking with the steel coil and the reel. By aligning the steel coil and the reel, more precise height adjustment of the steel coil can be achieved, thereby improving the practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the appearance structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of rear view state; Figure 3 For the present invention Figure 1 Schematic diagram of the upward-looking state; Figure 4 For the present invention Figure 1 Schematic diagram of the main body of the middle uncoiler; Figure 5 For the present invention Figure 1 Schematic diagram of the middle car plate when looking up; Figure 6 For the present invention Figure 4 Schematic diagram of part A; Figure 7 For the present invention Figure 5 Schematic diagram of part B.

[0020] In the figure: 1. uncoiler body, 2. height adjustment device, 201. first hydraulic cylinder, 202. support ring, 203. round rod, 3. baffle, 4. reel, 5. wheel frame, 6. bracket, 7. wheel, 8. positioning device, 801. square plate, 802. first support arm, 803. second support arm, 804. electromagnet, 805. plug rod, 806. cylinder, 9. docking device, 901. rotating plate, 902. right-angle plate, 903. round rod, 904. round plate, 905. spring, 906. hook, 907. servo motor, 10. car plate, 11. third hydraulic cylinder, 12. controller, 13. support plate, 14. push plate, 15. second hydraulic cylinder, 16. bottom plate, 17. roller, 18. battery, 19. cross plate. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings: Refer to the attached Figure 1-7 : In the present embodiment, a fully automatic coiling device for cold-rolled steel strip includes a uncoiler body 1 and a reel 4. The front end of the uncoiler body 1 is rotatably connected to the reel 4. A positioning device 8 is provided on the outer wall of the uncoiler body 1. The uncoiler body 1 can meet the working needs according to actual needs. A car plate 10 is provided on one side of the uncoiler body 1. A height adjustment device 2 is provided on the upper end of the car plate 10. A support plate 13 is provided above the car plate 10. A docking device 9 is provided on the lower end of the support plate 13.

[0022] The height adjustment device 2 includes a first hydraulic cylinder 201, a support ring 202, and a round rod 203; The first hydraulic cylinder 201 is fixedly connected to the vehicle plate 10 , and four groups of support rings 202 are provided. The lower ends of the multiple groups of support rings 202 are all fixedly connected to the vehicle plate 10 , and the inner walls of the support rings 202 are respectively slidably connected to multiple round rods 203 , and four groups of round rods 203 are provided. The lower ends of the multiple round rods 203 are all in contact with the vehicle plate 10 .

[0023] Through the cooperation of the height adjustment device 2, the docking device 9 and the support plate 13, the support plate 13 can drive the steel coil and the round rod 903 to move upward synchronously. When the round rod 903 moves to contact one end of the reel 4, the round rod 903 will move to one side, so that the round rod 903 can drive the circular plate 904 to stretch the spring 905, and at the same time, the pressure sensor inside the round rod 903 will be subjected to pressure. When the round rod 903 moves to correspond to the groove on one side of the reel 4, under the push of the spring 905, the round rod 903 can be inserted into the groove of the reel 4. At this time, the pressure sensor inside the round rod 903 is no longer subjected to pressure. The telescopic end of the first hydraulic cylinder 201 is controlled by the controller 12 to no longer extend, and the docking with the steel coil and the reel 4 is completed. By aligning the steel coil and the reel, the present invention can be more convenient during installation, save time, and improve installation efficiency.

[0024] The upper ends of the multiple groups of round rods 203 are fixedly connected to the support plate 13, and the lower end of the support plate 13 is fixedly connected to the telescopic end of the first hydraulic cylinder 201. The first hydraulic cylinder 201 can meet the working needs according to actual needs.

[0025] The lower end of the vehicle plate 10 is fixedly connected to multiple sets of wheel frames 5, and there are four sets of wheel frames 5. The multiple sets of wheel frames 5 are rotatably connected to the rotating shafts of the multiple sets of wheels 7 through bearings. A driving motor is installed on one side of the four sets of wheels 7. With the cooperation of the battery 18 and the controller 12, the four sets of wheels 7 can be rotated. The battery 18 is installed at the lower end of the vehicle plate 10.

[0026] The inner wall of the uncoiler body 1 is fixedly connected to a bottom plate 16, and the upper end of the bottom plate 16 is fixedly connected to a second hydraulic cylinder 15. The second hydraulic cylinder 15 can meet working needs according to actual needs. The telescopic end of the second hydraulic cylinder 15 is fixedly connected to a cross plate 19, and the upper ends of the cross plate 19 are rotatably connected to the rotating shafts of the two rollers 17 through bearings.

[0027] The outer wall of the reel 4 is fixedly connected with a plurality of baffles 3, and the upper end of the vehicle plate 10 is fixedly connected with a controller 12. The controller 12 can meet the working requirements according to actual needs.

[0028] The upper end of the vehicle plate 10 is fixedly connected to a bracket 6 , and the inner wall of the bracket 6 is connected to the third hydraulic cylinder 11 . The third hydraulic cylinder 11 can meet working requirements according to actual needs, and the telescopic end of the third hydraulic cylinder 11 is fixedly connected to the push plate 14 .

[0029] The positioning device 8 includes a square plate 801, a first support arm 802, a second support arm 803, an electromagnet 804, an insertion rod 805 and a cylinder 806; The upper ends of the two side square plates 801 are fixedly connected to the car plate 10, one end of the two side square plates 801 is fitted with the uncoiler body 1, one end of the insertion rod 805 is fixedly connected to the protruding part of the car plate 10, and the other end of the insertion rod 805 is plugged into the cylinder 806. The insertion rod 805 can be made of iron, and the outer wall of the cylinder 806 is fixedly connected to the first support arm 802. Both ends of the first support arm 802 are fixedly connected to the uncoiler body 1, and one end of the cylinder 806 is fixedly connected to an electromagnet 804. The outer wall of the electromagnet 804 is fixedly connected to the second support arm 803. Both ends of the second support arm 803 are fixedly connected to the uncoiler body 1.

[0030] Through the cooperation of the positioning device 8 and the vehicle plate 10, the operator cooperates with the controller 12 and the battery 18 to make the four sets of wheels 7 rotate under the action of the driving motor, so that the four sets of wheels 7 can drive the vehicle plate 10 to move, and the vehicle plate 10 can drive the steel coil to be transported. The four sets of wheels 7 drive the insertion rod 805 to be inserted into the interior of the cylinder 806. When the square plates 801 on both sides are moved to fit with the front end of the uncoiler body 1, the wheels 7 are stopped, and the insertion rod 805 fits with the electromagnet 804. At the same time, the electromagnet 804 is energized so that the electromagnet 804 can adsorb the insertion rod 805, so that the vehicle plate 10 can be stably connected to the uncoiler body 1. Under the action of the arc on the surface of the support plate 13, the steel coil can be placed in the center, so that the steel coil can be in the same straight line with the reel 4. The vehicle plate 10 and the uncoiler body 1 can be aligned, which makes the present invention more convenient during installation.

[0031] The docking device 9 includes a rotating plate 901, a right-angle plate 902, a round rod 903, a round plate 904, a spring 905, a hook 906 and a servo motor 907; The servo motor 907 is fixedly connected to the vehicle plate 10 through the motor frame. The servo motor 907 can meet the working needs according to actual needs. The output shaft of the servo motor 907 is fixedly connected to the rotating plate 901. The upper end of the rotating plate 901 is slidingly connected to the round rod 903. One end of the round rod 903 is fixedly connected to the circular plate 904. One end of the rotating plate 901 is fixedly connected to the right-angle plate 902. One end of the right-angle plate 902 and the rotating plate 901 are respectively fixedly connected to the two ends of the spring 905. The spring 905 can meet the working needs according to actual needs. One end of the spring 905 passes through the rotating plate 901 through a through hole opened on the surface of the rotating plate 901, and the upper end of the hook 906 is fixedly connected to the vehicle plate 10.

[0032] Through the cooperation of the height adjustment device 2, the docking device 9 and the support plate 13, the support plate 13 can drive the steel coil and the round rod 903 to move upward synchronously. When the round rod 903 moves to contact one end of the reel 4, the round rod 903 will move to one side, so that the round rod 903 can drive the circular plate 904 to stretch the spring 905, and at the same time, the pressure sensor inside the round rod 903 will be subjected to pressure. When the round rod 903 moves to correspond to the groove on one side of the reel 4, under the push of the spring 905, the round rod 903 can be inserted into the groove of the reel 4. At this time, the pressure sensor inside the round rod 903 is no longer subjected to pressure. The telescopic end of the first hydraulic cylinder 201 is controlled by the controller 12 to no longer extend, and the docking with the steel coil and the reel 4 is completed. By aligning the steel coil and the reel, a more precise height adjustment of the steel coil can be achieved, thereby improving the practicality of the present invention.

[0033] Working principle: When the cold rolled steel strip is automatically coiled: The operator places the steel coil on the surface of the pallet 13 by hoisting, so that both ends of the steel coil are inside the pallet 13 (both ends of the steel coil do not exceed the pallet 13).

[0034] Shipping process: The operator uses the controller 12 and the battery 18 in coordination to make the four sets of wheels 7 rotate under the action of the driving motor, so that the four sets of wheels 7 can drive the vehicle plate 10 to move, and the vehicle plate 10 can drive the steel coil to be transported. The four sets of wheels 7 drive the insertion rod 805 to be inserted into the interior of the cylinder 806. When the square plates 801 on both sides are moved to fit with the front end of the uncoiler body 1, the wheels 7 are stopped, the insertion rod 805 fits with the electromagnet 804, and the electromagnet 804 is energized at the same time, so that the electromagnet 804 can adsorb the insertion rod 805, so that the vehicle plate 10 can be stably connected to the uncoiler body 1, and under the action of the arc on the surface of the support plate 13, the steel coil can be placed in the center, so that the steel coil can be in the same straight line with the reel 4.

[0035] Alignment process: The servo motor 907 is controlled by the controller 12 to work, so that the servo motor 907 can drive the rotating plate 901 to rotate to a vertical state and then stop the servo motor 907. While the rotating plate 901 is rotating, the hook 906 can be detached, and the round rod 903 can be driven to rotate synchronously (the length of the rotating plate 901 can be changed by replacement, one length corresponds to a steel coil of a specification, and the rotating plate 901 can make the round rod 903 and the center position of the steel coil in a coaxial state), and the first hydraulic cylinder 201 is controlled to work, so that the first hydraulic cylinder 201 can drive the support plate 13 to move upward, and the support plate 13 can drive the four round rods 203 to rotate in the four support rings 202. The support plate 13 can drive the steel coil and the round rod 903 to move upward synchronously. When the round rod 903 moves to contact one end of the reel 4, the round rod 903 will move to one side, so that the round rod 903 can drive the circular plate 904 to stretch the spring 905, and at the same time, the pressure sensor inside the round rod 903 will be subjected to pressure. When the round rod 903 moves to correspond to the groove on one side of the reel 4, the round rod 903 can be inserted into the groove of the reel 4 under the push of the spring 905. At this time, the pressure sensor inside the round rod 903 is no longer subjected to pressure, and the telescopic end of the first hydraulic cylinder 201 is controlled by the controller 12 to no longer extend, thereby completing the docking with the steel coil and the reel 4.

[0036] Loading process: According to the above operation, the electromagnet 804 is stopped from working, and the car plate 10 is moved away from the coiling machine body 1 again, so that the round rod 903 can move out of the groove at one end of the coil 4, and the rotating plate 901 is rotated again to fit with the hook 906, and the third hydraulic cylinder 11 is controlled to work, and the telescopic end of the third hydraulic cylinder 11 is started to extend to drive the push plate 14 to move, so that the push plate 14 pushes the steel coil to the surface of the coil 4, and the coil 4 is controlled to work so that the coil 4 is pressed against the inner wall of the steel coil to complete the installation of the steel coil, and at the same time, the second hydraulic cylinder 15 is controlled to work so that the second hydraulic cylinder 15 drives the rollers 17 on both sides to move upward through the cross plate 19, so that the rollers 17 on both sides can fit with the steel coil and support the steel coil, completing the installation process of the steel coil, and the steel coil can be unfolded.

[0037] Although the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A fully automatic coiling device for cold-rolled steel strip, comprising an uncoiler main body (1) and a reel (4), wherein the front end of the uncoiler main body (1) is rotatably connected to the reel (4). Features: The outer wall of the uncoiler body (1) is provided with a positioning device (8), a car plate (10) is provided on one side of the uncoiler body (1), a height adjustment device (2) is provided at the upper end of the car plate (10), a support plate (13) is provided above the car plate (10), and a docking device (9) is provided at the lower end of the support plate (13).

2. A fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: The height adjustment device (2) comprises a first hydraulic cylinder (201), a support ring (202), and a round rod (203); The first hydraulic cylinder (201) is fixedly connected to the vehicle plate (10), the lower ends of the plurality of support rings (202) are fixedly connected to the vehicle plate (10), the inner walls of the support rings (202) are slidably connected to a plurality of round rods (203), and the lower ends of the plurality of round rods (203) are in contact with the vehicle plate (10).

3. A fully automatic coiling device for cold-rolled steel strip according to claim 2, Features: The upper ends of the multiple groups of round rods (203) are fixedly connected to the support plate (13), and the lower end of the support plate (13) is fixedly connected to the telescopic end of the first hydraulic cylinder (201).

4. The fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: The lower end of the vehicle plate (10) is fixedly connected to a plurality of sets of wheel frames (5), and the plurality of sets of wheel frames (5) are rotatably connected to the rotating shafts of the plurality of sets of wheels (7) via bearings. A storage battery (18) is installed at the lower end of the vehicle plate (10).

5. The fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: The inner wall of the uncoiler body (1) is fixedly connected to a bottom plate (16), the upper end of the bottom plate (16) is fixedly connected to a second hydraulic cylinder (15), the telescopic end of the second hydraulic cylinder (15) is fixedly connected to a cross plate (19), and the upper end of the cross plate (19) is rotatably connected to the rotating shafts of the two rollers (17) via bearings.

6. The fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: A plurality of baffles (3) are fixedly connected to the outer wall of the reel (4), and a controller (12) is fixedly connected to the upper end of the vehicle plate (10).

7. The fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: The upper end of the vehicle plate (10) is fixedly connected to a bracket (6), the inner wall of the bracket (6) is connected to a third hydraulic cylinder (11), and the telescopic end of the third hydraulic cylinder (11) is fixedly connected to a push plate (14).

8. The fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: The positioning device (8) comprises a square plate (801), a first support arm (802), a second support arm (803), an electromagnet (804), an insertion rod (805) and a cylinder (806); The upper ends of the square plates (801) on both sides are fixedly connected to the vehicle plate (10), one end of the square plates (801) on both sides is fitted with the uncoiler body (1), one end of the insertion rod (805) is fixedly connected to the protruding part of the vehicle plate (10), the other end of the insertion rod (805) is plugged into the cylinder (806), the outer wall of the cylinder (806) is fixedly connected to the first support arm (802), both ends of the first support arm (802) are fixedly connected to the uncoiler body (1), one end of the cylinder (806) is fixedly connected to an electromagnet (804), the outer wall of the electromagnet (804) is fixedly connected to the second support arm (803), and both ends of the second support arm (803) are fixedly connected to the uncoiler body (1).

9. The fully automatic coiling device for cold-rolled steel strip according to claim 1, Features: The docking device (9) comprises a rotating plate (901), a right-angle plate (902), a round rod (903), a round plate (904), a spring (905), a hook (906) and a servo motor (907); The servo motor (907) is fixedly connected to the vehicle plate (10) via a motor frame, the output shaft of the servo motor (907) is fixedly connected to the rotating plate (901), the upper end of the rotating plate (901) is slidably connected to the round rod (903), one end of the round rod (903) is fixedly connected to the round plate (904), one end of the rotating plate (901) is fixedly connected to the right-angle plate (902), one end of the right-angle plate (902) and the rotating plate (901) are respectively fixedly connected to the two ends of the spring (905), one end of the spring (905) passes through the rotating plate (901) through a through hole provided on the surface of the rotating plate (901), and the upper end of the hook (906) is fixedly connected to the vehicle plate (10).

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