Sheet thickness detecting mechanism and hoisting device

Abstract

The present application belongs to the technical field of plate transportation, and discloses a plate thickness detection mechanism and a hoisting device. The detection mechanism comprises a turnover assembly and a thickness detection assembly. The turnover assembly is used for turning up the edge part of the plate. The thickness detection assembly comprises a fixed support and a sliding swing arm. The sliding swing arm is rotatably connected to the fixed support through a rotating shaft. A clamping space for clamping the plate is formed between the sliding swing arm and the fixed support. When measuring the thickness of the plate, the sliding swing arm keeps a tendency of rotating towards the fixed support. An angle sensor is connected to the rotating shaft. The angle sensor is used for measuring the angle change value of the rotating shaft. The plate thickness detection mechanism and the hoisting device comprising the plate thickness detection mechanism have high plate thickness detection precision.

Description

Technical Field

[0001] This invention relates to the field of sheet metal transportation technology, and in particular to a sheet metal thickness detection mechanism and hoisting device. Background Technology

[0002] In daily production, when it is necessary to move sheet materials (referred to as sheet metal) on the production line, gantry cranes are usually used to transfer the sheet materials. The gantry cranes can pick up and move stacked sheet materials one by one to a designated location.

[0003] After lifting sheet metal, the gantry crane needs to detect various basic parameters of the sheet metal, such as sheet weight, sheet width, and sheet thickness. Currently, the sheet thickness is mainly detected by photoelectric switches installed on the gantry crane. The photoelectric switches determine the sheet thickness by detecting the opening width of the jaws holding the sheet metal. However, the detection accuracy is low and it is prone to misjudgment. Summary of the Invention

[0004] The purpose of this invention is to provide a sheet metal thickness detection mechanism and hoisting device to solve the problem of low accuracy in sheet metal thickness detection.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A sheet metal thickness detection mechanism includes a flipping component and a thickness detection component. The flipping component is used to flip up the edge portion of the sheet metal. The thickness detection component includes a fixed bracket, a sliding arm, and an angle sensor. The sliding arm is rotatably connected to the fixed bracket via a rotating shaft, and a clamping space for clamping the sheet metal is formed between the sliding arm and the fixed bracket. When measuring the thickness of the sheet metal, the sliding arm maintains a tendency to rotate towards the fixed bracket to clamp the sheet metal. The angle sensor is connected to the rotating shaft and is used to measure the angle change value of the rotating shaft.

[0007] Optionally, the sliding swing arm includes a swing arm body and a roller. The swing arm body is rotatably connected to the fixed bracket via the rotating shaft. The roller is disposed at the cantilever end of the swing arm body, and the roller cooperates with the fixed bracket to form the clamping space.

[0008] Optionally, the fixing bracket includes a limiting part, which abuts against the limiting part after the sheet is inserted into the clamping space. The limiting part is used to limit the depth of the sheet inserted into the clamping space.

[0009] Optionally, the fixed bracket has a guide surface that moves from the side away from the pivot to the side closer to the pivot and towards the sliding arm, and the sheet metal is guided into the clamping space via the guide surface.

[0010] Optionally, the flipping assembly includes a flipping drive, a flipping arm, and a flipping gripper. The flipping drive is used to drive the flipping arm to flip, and the flipping gripper is disposed on the flipping arm and used to grip the sheet material.

[0011] Optionally, the thickness detection component further includes a first detection drive component, which is disposed at the output end of the flipping component and is used to drive the fixed bracket to move along the edge tilt direction of the sheet metal.

[0012] Optionally, the thickness detection component further includes a second detection drive, which is used to drive the fixed bracket to move up and down.

[0013] The hoisting device includes a frame, a movable seat, a drive mechanism, a gripping mechanism, and a sheet metal thickness detection mechanism as described above. The movable seat is movably connected to the frame via the drive mechanism, which drives the movable seat to move horizontally and vertically. Both the gripping mechanism and the sheet metal thickness detection mechanism are mounted on the movable seat.

[0014] Optionally, the drive mechanism includes a first motor, a second motor, a first reducer, and a second reducer. The first motor is connected to the first reducer. The first motor is used to drive the movable seat to translate, and the second motor is used to drive the movable seat to lift.

[0015] Optionally, the hoisting device further includes a sheet-splitting mechanism disposed on the movable seat. The sheet-splitting mechanism includes a sheet splitter, a first sheet-splitting drive member, and a second sheet-splitting drive member. The first sheet-splitting drive member is used to drive the sheet splitter to move horizontally, and the second sheet-splitting drive member is used to drive the sheet splitter to move vertically.

[0016] The beneficial effects of the present invention are as follows: The sheet thickness detection mechanism and hoisting device proposed in the present invention use a flipping component to flip the sheet, so that a gap can be formed between the sheet and the support surface on which the sheet is located for the thickness detection component to be inserted. Then, the encoder in the thickness detection component monitors the angle change of the thickness detection component during the insertion of the thickness detection component into the sheet, thereby realizing accurate measurement of the sheet thickness with a low error rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hoisting device in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0019] Figure 3 This is a schematic diagram of the structure of the movable seat in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the crossbeam structure in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the vertical beam in an embodiment of the present invention.

[0022] In the picture:

[0023] 10. Sheet metal thickness detection mechanism; 11. Tilting assembly; 111. Tilting arm; 112. Tilting drive component; 113. Tilting gripper; 114. Rotating arm; 12. Thickness detection assembly; 121. Fixed bracket; 1211. Main body; 1212. Cantilever; 1213. Limiting part; 122. Sliding swing arm; 1221. Swing arm body; 1222. Roller; 123. Angle sensor; 124. First detection drive component; 125. Second detection drive component;

[0024] 20. Frame; 21. Gantry frame; 22. Crossbeam;

[0025] 30. Movable seat; 31. Upright beam; 32. Mounting bracket;

[0026] 40. Drive mechanism; 41. First drive assembly; 411. First motor; 412. First reducer; 413. First rack; 414. Mounting plate; 415. Second monitoring element; 416. First stop; 417. Cable chain fixing bracket; 418. First cable chain; 419. Second cable chain; 42. Second drive assembly; 421. Second motor; 422. Second reducer; 423. Second rack; 424. Second gear; 425. Third monitoring element; 426. Second stop;

[0027] 50. Grasping mechanism; 51. Grasping suction cup; 52. First monitoring component;

[0028] 60. Sheet splitting mechanism; 61. First sheet splitting drive; 62. Second sheet splitting drive; 63. Sheet splitter;

[0029] 70. Electrical control box. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0034] refer to Figures 1-5 As shown, this embodiment proposes a sheet metal thickness detection mechanism 10 and a hoisting device. The hoisting device is used to transfer the sheet metal from an initial position to a target position. The hoisting device includes a frame 20, a movable seat 30, a drive mechanism 40, a gripping mechanism 50, and the aforementioned sheet metal thickness detection mechanism 10. Both the gripping mechanism 50 and the sheet metal thickness detection mechanism 10 are mounted on the movable seat 30. The movable seat 30 is movably mounted on the frame 20 and driven by the drive mechanism 40, thereby realizing translation or lifting relative to the frame 20. The gripping mechanism 50 is used to grip the sheet metal, and the sheet metal thickness detection mechanism 10 is used to detect the sheet metal thickness.

[0035] refer to Figure 1 and Figure 2As shown, the sheet thickness detection mechanism 10 provided in this embodiment includes a flipping component 11 and a thickness detection component 12. The flipping component 11 is used to flip up the edge part of the sheet, so that the sheet and its supporting surface form a certain gap. It can be understood that the supporting surface can be the upper surface of other sheets located below the sheet, or the upper surface of the support base where the sheet is located. That is, the sheets can be stacked or placed individually. The thickness detection component 12 includes a fixed bracket 121, a sliding arm 122, and an angle sensor 123. The sliding arm 122 is rotatably connected to the fixed bracket 121 via a rotating shaft. A first clamping surface is formed on the fixed bracket 121, and a second clamping surface is formed on the sliding arm 122. The first clamping surface and the second clamping surface together form a clamping space for clamping the sheet metal. When measuring the thickness of the sheet metal, the sliding arm 122 maintains a tendency to rotate toward the fixed bracket 121, that is, the second clamping surface maintains a tendency to move toward the first clamping surface, so as to clamp the sheet metal. An angle sensor 123 is connected to the rotating shaft. The angle sensor 123 is used to measure the angle change value of the rotating shaft from the initial position to the point where the second clamping surface abuts against the sheet metal.

[0036] The aforementioned sheet metal thickness detection mechanism 10 and hoisting device utilize the flipping component 11 to flip the sheet metal, causing one end of the sheet metal to be lifted upwards. This allows the fixed bracket 121 or the sliding swing arm 122 to be inserted under the sheet metal along the inclined direction of the sheet metal edge. Since the second clamping surface maintains a tendency to move towards the first clamping surface, the sliding swing arm 122 and the fixed bracket 121 are respectively attached to the upper and lower surfaces of the sheet metal. The angle sensor 123 can calculate the thickness of the sheet metal by calculating the rotation angle of the rotating shaft, thus reducing the probability of detection misjudgment.

[0037] In this embodiment, the angle sensor 123 uses an encoder, which has higher accuracy compared to other angle sensors.

[0038] To maintain the tendency of the sliding arm 122 to rotate toward the fixed bracket 121, the thickness detection assembly 12 also includes an elastic element (not shown in the figure), which is connected to the fixed bracket 121 and the sliding arm 122. Specifically, the elastic element is a tension spring, which is easier to replace than a torsion spring.

[0039] In other embodiments, the sliding arm 122 can also maintain its tendency to rotate toward the fixed bracket 121 by means of its own elasticity, which will not be described in detail here.

[0040] Continue to refer to Figure 2As shown, the fixed bracket 121 includes a main body 1211 and a cantilever 1212, with a first clamping surface formed on the cantilever 1212. Specifically, the sliding swing arm 122 is located below the cantilever 1212. To reduce the difficulty of inserting the sliding swing arm 122 under the sheet metal, the sliding swing arm 122 includes a swing arm body 1221 and a roller 1222. The swing arm body 1221 is rotatably mounted on the main body 1211 via a pivot. The roller 1222 is located at the cantilever end of the swing arm body 1221. The outer circumferential surface of the roller 1222 serves as a second clamping surface, which can reduce the friction between the sliding swing arm 122 and the sheet metal when they translate relative to each other. At the same time, the end of the cantilever 1212 away from the main body 1211 is provided with a guide surface that gradually approaches the roller 1222 from the side away from the main body 1211 towards the side closer to the main body 1211. The guide surface is connected to the first clamping surface to reduce the difficulty of the sheet metal entering the clamping space.

[0041] Obviously, the thickness of the sheet metal is related not only to the rotation angle of the sliding arm 122, but its accuracy is also affected by whether the actual moving distance of the first detection drive 124 is consistent with the preset distance. To improve the detection accuracy, the fixed bracket 121 also includes a limiting part 1213, which is vertically connected to the cantilever part 1212. After the sheet metal is inserted into the clamping space, it can abut against the limiting part 1213, thereby achieving the limiting. Specifically, the cantilever part 1212, the main body part 1211, and the limiting part 1213 are integrally bent and formed.

[0042] refer to Figure 3 As shown, the thickness detection assembly 12 also includes a first detection drive 124, and a fixed bracket 121 is disposed at the output end of the first detection drive 124. The first detection drive 124 is used to drive the fixed bracket 121 to move along the inclined direction of the edge of the sheet metal. Specifically, the first detection drive 124 is disposed at the output end of the flipping assembly 11 so as to flip together with the sheet metal, thereby keeping the first clamping surface on the fixed bracket 121 parallel to the sheet metal.

[0043] Continue to refer to Figure 2 As shown, the thickness detection assembly 12 also includes a second detection drive 125. The second detection drive 125 is fixedly disposed at the output end of the first detection drive 124, and the fixed bracket 121 is indirectly disposed at the output end of the first detection drive 124 by being disposed at the output end of the second detection drive 125. When the lifting device lifts the sheet metal, the second detection drive 125 can drive the entire sheet metal thickness detection mechanism 10 to be positioned above the sheet metal, thereby reducing the space occupied on the plane where the sheet metal is located and avoiding interference with other structures.

[0044] Since the driving strokes of the second detection drive 125, the first detection drive 124, and the tilting drive 112 are fixed, in this embodiment, all three drives are pneumatic cylinders. Of course, in other embodiments, the aforementioned drive components can also be electric cylinders or hydraulic cylinders, etc.

[0045] refer to Figure 2 and Figure 3 As shown, the flipping assembly 11 includes a flipping drive 112, a flipping arm 111, and a flipping gripper 113. The flipping gripper 113 is disposed on the flipping arm 111 and is used to grip the sheet metal. The flipping drive 112 is connected to the movable seat 30 and the flipping arm 111 and is used to drive the flipping arm 111 to flip relative to the movable seat 30. The first detection drive 124 is disposed on the flipping arm 111.

[0046] Specifically, the flipping gripper 113 uses a suction cup. The suction cup can flip the edge of the sheet material upward by adsorbing the upper surface of the edge. Compared with other gripping structures such as claws, it is easier to operate. More specifically, the flipping gripper 113 uses a vacuum suction cup. Compared with electromagnetic suction cups, vacuum suction cups can adsorb more types of sheet materials and have a wider range of applications.

[0047] Continue to refer to Figure 2 As shown, to improve the stability of the sheet metal thickness detection mechanism 10 on the movable seat 30, the flipping assembly 11 also includes a rotating arm 114. At least two rotating arms 114 are spaced apart along the length of the flipping arm 111. The flipping arm 111 is connected to the movable seat 30 via the rotating arm 114, which is rotatably connected to the movable seat 30, thus improving the stability of the flipping assembly 11 mounted on the movable seat 30. Furthermore, two flipping drive components 112 are also spaced apart along the length of the flipping arm 111. Of course, when the sheet metal thickness detection mechanism 10 is not used in a lifting device, the flipping arm 111 can also be rotatably connected to another base via the rotating arm 114. The base could be, for example, a support seat.

[0048] refer to Figure 1 As shown, taking the target position of the sheet metal located on one side of the initial position of the sheet metal along the X-axis as an example, the flipping arm 111 extends along the X-axis, and the first detection drive 124 drives the fixed bracket 121 to move along the Y-axis. Of course, the first detection drive 124 can also drive the fixed bracket 121 to move along the X-axis.

[0049] refer to Figure 1 , Figure 4 and Figure 5As shown, the frame 20 includes a gantry frame 21 and a crossbeam 22. Two gantry frames 21 are spaced apart along the X-axis. The two ends of the crossbeam 22 are respectively connected to the two gantry frames 21 to form the frame 20. The drive mechanism 40 includes a first drive assembly 41 and a second drive assembly 42. The first drive assembly 41 includes a first motor 411 and a first reducer 412. The first motor 411 is movably connected to the crossbeam 22 along the X-axis via a mounting plate 414 that is slidably connected to the crossbeam 22. The first reducer 412 is connected to the first motor 411 and is driven by the crossbeam 22. When the first motor 411 is working, the movable seat 30 set on the mounting plate 414 moves along the X-axis under the action of the first motor 411. The second drive assembly 42 includes a second motor 421 and a second reducer 422. The second motor 421 is set on the mounting plate 414 and moves along the X-axis with the mounting plate 414. The second reducer 422 is connected to the second motor 421.

[0050] Specifically, the first motor 411 and / or the second motor 421 are servo motors to improve the accuracy of the movable seat 30 traveling along the X-axis and / or Z-axis, while the first reducer 412 and / or the second reducer 422 are planetary gear reducers. Compared with integrated geared motors, the separate motor and reducer structures reduce the installation space required for the drive mechanism 40 in the X-axis and Z-axis directions, which is conducive to the miniaturization and high integration of the hoisting device.

[0051] In this embodiment, to convert the rotational motion of the first motor 411 into linear motion, the first drive assembly 41 further includes a first rack 413 and a first gear. The first rack 413 is disposed on the crossbeam 22 along the X-axis, and the first gear is connected to the first reducer 412 and meshes with the first rack 413. Similarly, the second drive assembly 42 further includes a second rack 423 and a second gear 424. The second rack 423 is disposed on the movable seat 30 along the Z-axis, and the second gear 424 is connected to the second reducer 422 and meshes with the second rack 423. In other embodiments, the first drive assembly 41 and the second drive assembly 42 can also convert the rotational motion of the first motor 411 and the second motor 421 into linear motion through a belt drive structure or a sprocket drive structure, which will not be described in detail here.

[0052] The first drive assembly 41 also includes a second monitoring element 415 and a first stop 416. When the mounting plate 414 moves into the detectable range of the second monitoring element 415, the first motor 411 stops working. Two first stop blocks 416 are spaced apart along the X-axis. The first stop blocks 416 act as hard limits, and together with the second monitoring element 415, they can further restrict the travel of the mounting plate 414, improving the travel accuracy of the movable seat 30 along the X-axis. Specifically, the second monitoring element 415 is a photoelectric switch.

[0053] Meanwhile, the first drive assembly 41 also includes a cable chain fixing frame 417, a first cable chain 418, a second cable chain 419, and a cable chain guide plate. The cable chain guide plate is arranged on the crossbeam 22 along the X-axis and is located on opposite sides of the crossbeam 22 along the Y-axis with the first motor 411, so as to avoid interfering with the movement of the first motor 411. The first cable chain 418 is arranged on the cable chain guide plate, and the second cable chain 419 is installed on the mounting plate 414 through the cable chain fixing frame 417.

[0054] Continue to refer to Figure 5 As shown, the second drive assembly 42 also includes a third monitoring element 425 and a second stop 426. The third monitoring element 425 and the second stop 426 have similar functions to the second monitoring element 415 and the first stop 416, all of which are to provide accuracy for the movement of the movable seat 30 along the Z-axis direction, and will not be described in detail here. The third monitoring element 425 can also be a photoelectric switch.

[0055] refer to Figure 1 , Figure 3 , Figure 5 As shown, the movable seat 30 includes a vertical beam 31 and a mounting frame 32. The vertical beam 31 is slidably mounted on the mounting plate 414 along the Z-axis direction. The second rack 423 is mounted on the vertical beam 31. The mounting frame 32 is mounted at the bottom of the vertical beam 31 and has the same shape as the sheet material. For example, if the sheet material is rectangular, the mounting frame 32 is also rectangular. The gripping mechanism 50 and the sheet material thickness detection mechanism 10 are both mounted on the mounting frame 32.

[0056] refer to Figure 3 As shown, the gripping mechanism 50 includes multiple gripping suction cups 51 disposed at the bottom of the mounting frame 32. These suction cups 51 are arranged in an array on the mounting frame 32 to ensure consistent clamping force across the sheet metal, thus improving gripping stability. More specifically, the position of the gripping suction cups 51 on the mounting frame 32 is adjustable to accommodate different sheet metal dimensions. The suction cups 51 are vacuum suction cups, and the gripping mechanism 50 also includes a vacuum pump connected to them. To reduce manufacturing costs, the vacuum suction cup in the sheet metal thickness detection mechanism 10, which serves as the flipping gripper 113, is also connected to the vacuum pump. Furthermore, the gripping mechanism 50 includes a first monitoring element 52 communicatively connected to the vacuum pump. The first monitoring element 52 monitors the distance between the movable seat 30 and the sheet metal in the Z-axis direction to activate the vacuum pump in a timely manner. The first monitoring element 52 may also be, but is not limited to, a proximity switch. Specifically, the first monitoring element 52 is slidably disposed on the mounting frame 32 along the Z-axis direction.

[0057] Based on the premise of stacking the sheet metal vertically, in order to better separate adjacent sheet metals, the hoisting device also includes a sheet-splitting mechanism 60. The sheet-splitting mechanism 60 includes a sheet separator 63, a first sheet-splitting drive 61, and a second sheet-splitting drive 62. The first sheet-splitting drive 61 is mounted on the mounting frame 32 and is used to drive the sheet separator 63 to move along the X-axis or Y-axis to the edge of the sheet metal. The second sheet-splitting drive 62 is located at the output end of the first sheet-splitting drive 61 and is used to drive the sheet separator 63 to move along the Z-axis to fit against the edge of the sheet metal. The sheet separator 63 is located at the output end of the second sheet-splitting drive 62 and is used to separate the sheet metal. The sheet separator 63 is prior art and will not be described in detail here.

[0058] Meanwhile, the hoisting device also includes an electrical control box 70 installed on the movable seat 30. The electrical control box 70 is communicatively connected to the drive mechanism 40, the sheet separation mechanism 60, the gripping mechanism 50, and the sheet thickness detection mechanism 10, in order to control the operation of the above-mentioned functional mechanisms.

[0059] When transferring sheet metal using the aforementioned hoisting device, the first drive assembly 41 moves the movable seat 30 to the initial position of the sheet metal. The second drive assembly drives the movable seat 30 to descend and uses the gripping mechanism 50 to grip the sheet metal. The first monitoring component 52 determines the distance between the movable seat 30 and the uppermost sheet metal, and the gripping suction cup 51 is used to adsorb the sheet metal in time. The first sheet separation drive component 61 and the second sheet separation drive component 62 respectively drive the sheet separator 63 to move, so that the sheet separator 63 fits against the edge of the sheet metal. The sheet separator 63 separates adjacent layers of sheet metal. The swing arm drive component retracts, so that the flipping gripper 113 on the flipping arm 111 flips the sheet metal upward to a predetermined angle. The first detection drive component 124 and the second detection drive component 125 drive the fixed bracket 121 and the sliding swing arm 122 to move, so that the fixed bracket 121 and the sliding swing arm 122 fit against the upper and lower surfaces of the sheet metal, respectively. The sheet metal thickness can then be obtained by calculating the angle based on the angle sensor 123. After the thickness detection is completed, the fixed bracket 121 and the sliding swing arm 122 leave the sheet material, the flipping drive component 112 extends, so that the flipping gripper 113 on the flipping arm 111 drives the sheet material back to its original state, the second drive component drives the movable seat 30 to rise to a safe height, and the first drive component 41 transports the sheet material gripped by the gripping suction cup 51 to the target position and lowers it to the material release height to complete the material release work.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A sheet thickness detecting mechanism characterized by comprising: The plate thickness detection mechanism (10) comprises: A turnover assembly (11) for turning up an edge portion of a plate, the turnover assembly (11) comprising a turnover driving member (112) for driving a turnover arm (111) to turn over, and a turnover grabbing member (113) arranged on the turnover arm (111) and used for grabbing the plate; A thickness detection assembly (12) comprising a fixed support (121), a sliding swing arm (122) and an angle sensor (123), the sliding swing arm (122) being rotationally connected to the fixed support (121) through a pivot, a clamping space for clamping the plate being formed between the sliding swing arm (122) and the fixed support (121), and the sliding swing arm (122) keeping a tendency of rotating towards the fixed support (121) to clamp the plate when measuring the thickness of the plate, the pivot being connected with the angle sensor (123), and the angle sensor (123) being used for measuring an angle change value of the pivot. The sliding swing arm (122) comprises a swing arm body (1221) and a roller (1222), the swing arm body (1221) being rotationally connected to the fixed support (121) through the pivot, and the roller (1222) being arranged at a cantilever end of the swing arm body (1221) and cooperating with the fixed support (121) to form the clamping space.

2. The sheet thickness detecting mechanism according to claim 1, characterized by The fixed support (121) comprises a limiting portion (1213), the plate being capable of abutting against the limiting portion (1213) after being inserted into the clamping space, and the limiting portion (1213) being used for limiting a depth of the plate inserted into the clamping space.

3. The sheet thickness detecting mechanism according to claim 1, characterized by A guide surface is formed on the fixed support (121) from a side away from the pivot to a side close to the pivot and close to the sliding swing arm (122), and the plate is guided into the clamping space through the guide surface.

4. The sheet thickness detecting mechanism according to any one of claims 1 to 3, characterized by The thickness detection assembly (12) further comprises a first detection driving member (124) arranged at an output end of the turnover assembly (11), and the first detection driving member (124) is used for driving the fixed support (121) to move along an inclined direction of the edge of the plate.

5. The sheet thickness detecting mechanism according to any one of claims 1 to 3, characterized by The thickness detection assembly (12) further comprises a second detection driving member (125) used for driving the fixed support (121) to ascend and descend.

6. Hoisting device, characterized in that The lifting device comprises a frame (20), a movable seat (30), a driving mechanism (40), a grabbing mechanism (50) and the sheet thickness detection mechanism (10) according to any one of claims 1-5, the movable seat (30) is movably connected to the frame (20) through the driving mechanism (40), the driving mechanism (40) is used for driving the movable seat (30) to translate and lift, and the grabbing mechanism (50) and the sheet thickness detection mechanism (10) are both arranged on the movable seat (30).

7. The hoisting device of claim 6, wherein The driving mechanism (40) comprises a first motor (411), a second motor (421), a first speed reducer (412) and a second speed reducer (422), the first motor (411) is connected with the first speed reducer (412), the first motor (411) is used for driving the movable seat (30) to translate, and the second motor (421) is used for driving the movable seat (30) to lift.

8. Hoisting arrangement according to any of claims 6-7, characterized in that The lifting device further comprises a sheet separating mechanism (60) arranged on the movable seat (30), the sheet separating mechanism (60) comprises a sheet separator (63), a first sheet separating driving member (61) and a second sheet separating driving member (62), the first sheet separating driving member (61) is used for driving the sheet separator (63) to translate, and the second sheet separating driving member (62) is used for driving the sheet separator (63) to lift.

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