Conveying device

Abstract

The utility model relates to the technical field of automation equipment, in particular to a conveying device which comprises a mounting frame, a conveying belt assembly and a lifting mechanism, and the mounting frame comprises a first mounting plate and a second mounting plate. The conveying belt assembly is arranged between the first mounting plate and the second mounting plate and provided with a bearing face used for bearing workpieces. The lifting mechanism comprises a lifting assembly and a supporting table, the supporting table is located between the first mounting plate and the second mounting plate and connected to the lifting assembly, the lifting assembly drives the supporting table to move in the third direction, the third direction is perpendicular to the first direction, and the supporting table has a lifting state and an avoiding state; when the supporting table is in the lifting state, the supporting table is located above the bearing face and fixed, and a workpiece is fixed to the supporting table. When the supporting table is in the avoiding state, the supporting table is located below the bearing face, and the conveying belt assembly bears the workpiece. The conveying device can complete the conveying and machining processes in the same conveying device, the workpiece circulation time is shortened, and the transfer efficiency of the conveying device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automation equipment, in particular to a conveying device. BACKGROUND

[0002] In the technical field of automation equipment, conveying devices are used to transfer workpieces between workstations. In the related art, conveying devices are usually designed as continuous large belts. After the workpieces are transferred to a workstation, the workpieces need to be moved to the processing position, and after the processing is completed, the processed workpieces are moved to the belt and transferred to the next workstation. However, moving the workpieces is time-consuming and laborious, resulting in low transfer efficiency of the conveying device. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a conveying device that can improve the transfer efficiency of the conveying device.

[0004] Embodiments of the present application provide a conveying device, which includes a mounting frame, a conveyor belt assembly, and a lifting mechanism. The mounting frame includes a first mounting plate and a second mounting plate, which are spaced apart along a first direction. The conveyor belt assembly is arranged between the first mounting plate and the second mounting plate and has a carrying surface for carrying workpieces. The lifting mechanism includes a lifting assembly arranged on the mounting frame and a support table located between the first mounting plate and the second mounting plate and connected to the lifting assembly. The lifting assembly drives the support table to move along a third direction perpendicular to the first direction. The support table has a lifting state and an avoiding state. When the support table is in the lifting state, the support table is located above the carrying surface and is fixed, and the workpieces are fixed to the support table. When the support table is in the avoiding state, the support table is located below the carrying surface, and the conveyor belt assembly carries the workpieces.

[0005] Optionally, the lifting assembly includes a lifting drive and a lifting frame. The lifting drive is arranged on the mounting frame and connected to the lifting frame and drives the lifting frame to move along the third direction. The lifting frame is fixedly connected to the support table.

[0006] Optionally, the lifting frame comprises a first support and a second support, the lifting drive comprises a first drive and a second drive, the first drive is arranged on the first mounting plate and connected to the first support, the second drive is arranged on the second mounting plate and connected to the second support, the first support is slidingly connected to the first mounting plate along the third direction, and the second support is slidingly connected to the second mounting plate along the third direction; the first support has a first mounting position and a second mounting position, the second support has a third mounting position and a fourth mounting position, and the support platform is connected to the first mounting position, the second mounting position, the third mounting position and the fourth mounting position at the same time.

[0007] Optionally, the first support comprises a first sliding plate and a first connecting plate, the first sliding plate is located on a side of the first mounting plate away from the second mounting plate, and the first sliding plate is slidingly connected to the first mounting plate along the third direction; the first connecting plate is connected to the first sliding plate, the first mounting position and the second mounting position are arranged on the first connecting plate, and a projection of the first connecting plate along the third direction is separated from the conveying belt assembly.

[0008] Optionally, the support platform comprises a bottom plate and a positioning plate, the bottom plate is connected to the lifting assembly, and the positioning plate is detachably connected to an upper surface of the bottom plate; the positioning plate is used for connecting the workpiece.

[0009] Optionally, the positioning plate comprises a plate body and a positioning column, the plate body is detachably connected to the bottom plate, and the positioning column is arranged on an upper surface of the plate body; the positioning column is used for limiting the workpiece.

[0010] Optionally, the conveying device further comprises a blocking mechanism, the blocking mechanism comprises a blocking mounting plate and a blocking piece, the blocking mounting plate is fixedly connected to the mounting frame, the blocking piece has a blocking state and a passing state; when the blocking piece is in the blocking state, the blocking piece intersects with the bearing surface to block the workpiece; when the blocking piece is in the passing state, the blocking piece is located below the bearing surface.

[0011] Optionally, the blocking mechanism further comprises a height adjusting plate and a third drive, the height adjusting plate is adjustably arranged on the blocking mounting plate along the third direction, and the third drive is arranged on the height adjusting plate; the third drive has an extension rod, and the blocking piece is arranged on the extension rod.

[0012] Optionally, the conveying device further comprises a check mechanism, the check mechanism comprising a check mounting plate, a check piece and an elastic piece, the check mounting plate is arranged on the mounting frame, the check piece is rotationally connected to the check mounting plate, the check piece has a check head, the elastic piece is connected to the check piece, the check piece has an elastic force for driving the check head to protrude from the check mounting plate, the check head has a storage state below the bearing surface and a check state intersecting with the bearing surface.

[0013] Optionally, the conveying device further comprises a controller, the controller is electrically connected to the lifting assembly to control the movement of the lifting assembly along the third direction.

[0014] In the conveying device described above, the mounting frame is composed of a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are arranged in a spaced manner along the first direction, ensuring the stability of the structure. The conveyor belt assembly is arranged between the two mounting plates, and the conveyor belt assembly is equipped with a bearing surface specially used for bearing workpieces, which can efficiently and stably convey various workpieces. The lifting mechanism includes two parts, a lifting assembly and a support platform. The lifting assembly is installed on the mounting frame, and the support platform is located between the first mounting plate and the second mounting plate and is connected to the lifting assembly. Through the driving of the lifting assembly, the support platform can move along the third direction (i.e. perpendicular to the first direction), thereby realizing the conversion between the lifting state and the avoidance state of the support platform. In the lifting state, the support platform is located above the bearing surface and is fixed, at this time the workpiece is fixed on the support platform, so as to facilitate the machining of the workpiece; while in the avoidance state, the support platform moves below the bearing surface, so that the conveyor belt assembly can smoothly bear and convey the workpiece, thereby the conveying device does not need to transport the workpiece to be machined to the machining position, and after the machining is completed, the machined workpiece is transported to the belt and transferred to the next station, the conveying and machining processes can be completed in the same conveying device, the workpiece transfer time is shortened, and the transfer efficiency of the conveying device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic diagram of the conveying device in an embodiment of the present application.

[0016] Figure 2 is the exploded structure schematic diagram of the conveying device in an embodiment of the present application.

[0017] Figure 3 is the structure schematic diagram of the lifting mechanism in an avoidance state in an embodiment of the present application.

[0018] Figure 4 is the overall structure schematic diagram of the lifting mechanism in an embodiment of the present application.

[0019] Figure 5is a schematic diagram of the overall structure of the support platform in an embodiment of the present application.

[0020] Figure 6 is a schematic diagram of the overall structure of the blocking mechanism in an embodiment of the present application.

[0021] Figure 7 is a schematic diagram of the overall structure of the non-return mechanism in an embodiment of the present application.

[0022] Explanation of main element symbols

[0023] 001, conveying device; 100, mounting frame; 110, first mounting plate; 120, second mounting plate; 200, conveying belt assembly; 210, bearing surface; 220, first conveying belt; 230, second conveying belt; 300, lifting mechanism; 310, lifting assembly; 311, lifting drive; 3111, first drive; 3112, second drive; 312, lifting frame; 3121, first support; 3121a, first mounting position; 3121b, second mounting position; 3121c, first sliding plate; 3121d, first connecting plate; 3122, second support; 3122a, third mounting position; 3122b, fourth mounting position; 320, support platform; 321, bottom plate; 3211, extension; 322, positioning plate; 400, conveying drive; 410, output shaft; 420, first synchronous wheel; 430, second synchronous wheel; 500, blocking mechanism; 510, blocking mounting plate; 520, blocking piece; 530, height adjusting plate; 540, third drive; 541, telescopic rod; 600, non-return mechanism; 610, non-return mounting plate; 611, mounting groove; 620, non-return piece; 621, non-return head; 6211, initial section; 6212, terminal section; 630, elastic piece; 700, controller; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0024] In order to further clarify the technical means and effects taken by the present application to achieve the intended purpose of the application, the following will be described in conjunction with the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0026] The conveying device of the related art needs to carry the workpiece to be processed to a processing position after the workpiece to be processed is transported to a station, and then carries the workpiece processed to a belt and flows to the next station. It is time-consuming and laborious to carry the workpiece, and the conveying efficiency of the conveying device is not high.

[0027] Embodiments of the present application provide a conveying device, comprising a mounting frame, a conveyor belt assembly and a lifting mechanism. The mounting frame comprises a first mounting plate and a second mounting plate, and the first mounting plate and the second mounting plate are arranged at intervals along a first direction. The conveyor belt assembly is arranged between the first mounting plate and the second mounting plate, and has a bearing surface for bearing a workpiece. The lifting mechanism comprises a lifting assembly and a supporting table. The lifting assembly is arranged on the mounting frame, and the supporting table is located between the first mounting plate and the second mounting plate and connected to the lifting assembly. The lifting assembly drives the supporting table to move along a third direction perpendicular to the first direction. The supporting table has a lifting state and an avoiding state. When the supporting table is in the lifting state, the supporting table is located above the bearing surface and is fixed, and the workpiece is fixed on the supporting table. When the supporting table is in the avoiding state, the supporting table is located below the bearing surface, and the conveyor belt assembly bears the workpiece.

[0028] The supporting table is located between the first mounting plate and the second mounting plate and connected to the lifting assembly. Through the driving of the lifting assembly, the supporting table can move along the third direction (i.e. perpendicular to the first direction), so as to realize the conversion between the lifting state and the avoiding state of the supporting table. In the lifting state, the supporting table is located above the bearing surface and is fixed, and at this time the workpiece is fixed on the supporting table, so as to facilitate the processing of the workpiece. In the avoiding state, the supporting table moves to below the bearing surface, so that the conveyor belt assembly can smoothly bear and convey the workpiece, so that the conveying device does not need to carry the workpiece to be processed to a processing position, and then carry the workpiece processed to a belt and flow to the next station. In the same conveying device, the conveying and processing processes can be completed, the workpiece flow time is shortened, and the conveying efficiency of the conveying device is improved.

[0029] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following embodiments and examples can be combined with each other without conflict.

[0030] Figure 1 The overall structure of the conveying device 001 in an embodiment of the present application is shown. Figure 2 The exploded structure of the conveying device 001 in an embodiment of the present application is shown.

[0031] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a conveying device 001, comprising a mounting frame 100, a conveyor belt assembly 200 and a lifting mechanism 300. The conveyor belt assembly 200 and the lifting mechanism 300 are both mounted on the mounting frame 100.

[0032] The mounting bracket 100 includes a first mounting plate 110 and a second mounting plate 120, which are spaced apart along a first direction X to form a transport space between the first mounting plate 110 and the second mounting plate 120.

[0033] The conveyor belt assembly 200 is disposed between the first mounting plate 110 and the second mounting plate 120, and the conveyor belt assembly 200 has a bearing surface 210 for bearing workpieces.

[0034] In some embodiments, the conveyor belt assembly 200 includes a first conveyor belt 220 and a second conveyor belt 230, both located in a conveying space. The first conveyor belt 220 is rotatably connected to the side of the first mounting plate 110 facing the second mounting plate 120, and the second conveyor belt 230 is rotatably connected to the side of the second mounting plate 120 facing the first mounting plate 110. The upper surfaces of the first conveyor belt 220 and the second conveyor belt 230 are located on the same horizontal plane to form a bearing surface 210 for carrying workpieces.

[0035] In some embodiments, the conveying device 001 further includes a conveying drive 400, which is mounted on the mounting frame 100. The output shaft 410 of the conveying drive 400 passes through the first mounting plate 110 and the second mounting plate 120. The circumferential surface of the output shaft 410 is provided with a first synchronous pulley 420 and a second synchronous pulley 430. A first conveyor belt 220 is driven to the first synchronous pulley 420, and a second conveyor belt 230 is driven to the second synchronous pulley 430. Thus, the conveying drive 400 simultaneously drives the first synchronous pulley 420 and the second synchronous pulley 430 to rotate synchronously, which is beneficial to improving the control convenience of the conveying device 001.

[0036] In some embodiments, the conveying drive 400 is a rotary motor.

[0037] Figure 3 A schematic diagram of the lifting mechanism 300 in an avoidance state is shown in one embodiment of this application.

[0038] Please see Figure 2 and Figure 3 In some embodiments, the lifting mechanism 300 includes a lifting assembly 310 and a support platform 320. The lifting assembly 310 is disposed on the mounting frame 100, and the support platform 320 is located between the first mounting plate 110 and the second mounting plate 120 and connected to the lifting assembly 310. The lifting assembly 310 drives the support platform 320 to move along a third direction Z, which is perpendicular to the first direction X. The support platform 320 has a lifting state and a avoidance state.

[0039] When the carrier 320 is in the lifting state, the carrier 320 is located above the bearing surface 210 and is fixed, and the workpiece is fixed to the carrier 320.

[0040] When the carrier 320 is in the avoidance state, the carrier 320 is located below the bearing surface 210, and the conveyor belt assembly 200 bears the workpiece.

[0041] The mounting frame 100 is composed of a first mounting plate 110 and a second mounting plate 120, which are arranged in the first direction X and connected at the bottom by a fixed plate to ensure the stability of the structure. The conveyor belt assembly 200 is arranged between the two mounting plates, and the conveyor belt assembly 200 is equipped with a bearing surface 210 specially used for bearing the workpiece, which can efficiently and stably convey the workpiece. Among them, the workpiece is transmitted along the second direction Y, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0042] The lifting mechanism 300 includes two parts of a lifting assembly 310 and a carrier 320, the lifting assembly 310 is installed on the mounting frame 100, and the carrier 320 is located between the first mounting plate 110 and the second mounting plate 120 and connected with the lifting assembly 310. Through the driving of the lifting assembly 310, the carrier 320 can move along the third direction Z (i.e. perpendicular to the first direction X), so as to realize the conversion between the lifting state and the avoidance state of the carrier 320.

[0043] In the lifting state, the carrier 320 is located above the bearing surface 210 and is fixed, and the workpiece is fixed to the carrier 320 at this time, so as to facilitate the machining of the workpiece; and in the avoidance state, the carrier 320 moves to below the bearing surface 210, so that the conveyor belt assembly 200 can smoothly bear and convey the workpiece, thereby shortening the workpiece circulation time and improving the transfer efficiency of the conveying device 001.

[0044] Figure 4 The overall structure schematic diagram of the lifting mechanism 300 in an embodiment of the application is shown.

[0045] Please refer to Figure 2 and Figure 4 In some embodiments, the lifting assembly 310 includes a lifting drive 311 and a lifting frame 312, the lifting drive 311 is arranged on the mounting frame 100, the lifting drive 311 is connected with the lifting frame 312 and drives the lifting frame 312 to move along the third direction Z, and the lifting frame 312 is fixedly connected with the carrier 320.

[0046] In some embodiments, the lifting frame 312 comprises a first support 3121 and a second support 3122, the lifting driver 311 comprises a first driver 3111 and a second driver 3112, the first driver 3111 is arranged on the first mounting plate 110 and connected to the first support 3121, the second driver 3112 is arranged on the second mounting plate 120 and connected to the second support 3122, the first support 3121 is slidingly connected to the first mounting plate 110 along the third direction Z, and the second support 3122 is slidingly connected to the second mounting plate 120 along the third direction Z.

[0047] In some embodiments, the first support 3121 and the first mounting plate 110 are connected by a linear guide rail, and the sliding direction of the linear guide rail is arranged along the third direction Z.

[0048] In some embodiments, the second support 3122 and the second mounting plate 120 are connected by a linear guide rail, and the sliding direction of the linear guide rail is arranged along the third direction Z.

[0049] In some embodiments, the first support 3121 has a first mounting position 3121a and a second mounting position 3121b, the second support 3122 has a third mounting position 3122a and a fourth mounting position 3122b, and the support platform 320 is connected to the first mounting position 3121a, the second mounting position 3121b, the third mounting position 3122a and the fourth mounting position 3122b at the same time.

[0050] In some embodiments, the first support 3121 comprises a first sliding plate 3121c and a first connecting plate 3121d, the first sliding plate 3121c is located on the side of the first mounting plate 110 away from the second mounting plate 120, and is slidingly connected to the first mounting plate 110 along the third direction Z, and the first connecting plate 3121d is connected to the upper surface of the first sliding plate 3121c. The first mounting position 3121a and the second mounting position 3121b are arranged on the first connecting plate 3121d, and the projection of the first connecting plate 3121d along the third direction Z is separated from the conveying belt assembly 200, that is, when the first connecting plate 3121d moves up and down along the third direction Z, the first connecting plate 3121d and the first conveying belt 220 are staggered with each other, which is beneficial to the first connecting plate 3121d driving the support platform 320 to move up and down.

[0051] Figure 5 The overall structure of the support platform 320 in one embodiment of the present application is shown.

[0052] Please refer to Figure 2 and Figure 5 In some embodiments, the support platform 320 comprises a bottom plate 321 and a positioning plate 322, the bottom plate 321 is connected to the lifting assembly 310, and the positioning plate 322 is detachably connected to the upper surface of the bottom plate 321 and is used for connecting workpieces.

[0053] The four corners of the bottom plate 321 are provided with protruding parts 3211 for connecting the first mounting position 3121a of the first support 3121, the second mounting position 3121b, and the third mounting position 3122a and the fourth mounting position 3122b of the second support 3122.

[0054] Figure 6 The overall structure of the blocking mechanism 500 in one embodiment of the application is shown.

[0055] Referring to Figure 2 and Figure 6 In some embodiments, the conveying device 001 further comprises a blocking mechanism 500, which comprises a blocking mounting plate 510 and a blocking piece 520, and the blocking mounting plate is fixedly connected with the mounting frame 100.

[0056] The blocking piece 520 has a blocking state and a passing state. When the blocking piece 520 is in the blocking state, the blocking piece 520 intersects with the carrying surface 210 to block the workpiece. When the blocking piece 520 is in the passing state, the blocking piece 520 is located below the carrying surface 210.

[0057] In some embodiments, the blocking mechanism 500 further comprises a height adjusting plate 530 and a third driving piece 540. The height adjusting plate 530 is adjustably arranged on the blocking mounting plate along the third direction Z. The third driving piece 540 is arranged on the height adjusting plate 530, and the third driving piece 540 has an extension rod 541. The blocking piece 520 is arranged on the extension rod 541.

[0058] When the extension rod 541 pushes the blocking piece 520 to rise to the position where the blocking piece 520 intersects with the carrying surface 210, the blocking piece 520 can block the workpiece from advancing, so as to facilitate the lifting mechanism 300 to lift the workpiece, which is beneficial to the machining of the workpiece. When the extension rod 541 descends and the blocking piece 520 descends with the extension rod 541 to below the carrying surface 210, the blocking piece 520 is in the passing state, and the workpiece can be conveyed by the conveyor belt assembly 200 from above the blocking piece 520 to the next station.

[0059] Figure 7 The overall structure of the blocking mechanism 500 in one embodiment of the application is shown.

[0060] Referring to Figure 2 and Figure 7In some embodiments, the conveying device 001 further comprises a check mechanism 600, the check mechanism 600 comprising a check mounting plate 610, a check piece 620 and an elastic piece 630, the check mounting plate 610 being arranged on the mounting frame 100, and the check piece 620 being rotatably connected to the check mounting plate 610. The upper surface of the check mounting plate 610 is provided with a mounting groove 611, and the check piece 620 is rotatably arranged in the mounting groove 611. The check piece 620 has a check head 621, and the elastic piece 630 is connected to the check piece 620. The elastic piece 630 has an elastic force for driving the check head 621 to protrude out of the check mounting plate 610. When the check head 621 is pressed, the check head 621 can be accommodated in the mounting groove 611. When the check head 621 is not pressed, the elastic piece 630 pushes the check head 621 to protrude out of the mounting groove 611.

[0061] The check piece 620 has an accommodation state below the bearing surface 210 and a check state intersecting with the bearing surface 210.

[0062] Specifically, the check head 621 has a feeding slope, the feeding slope is inclined upward and faces the blocking device, and the feeding slope has a starting section 6211 and a terminal section 6212. The starting section 6211 is located at the same horizontal plane as the bearing surface 210, and the terminal section 6212 is higher than the bearing surface 210. When the workpiece enters the conveying device 001 from the previous work station, the workpiece contacts the starting section 6211 of the check head 621 and gradually presses down the terminal section 6212. When the terminal section 6212 is completely accommodated in the mounting groove 611, the check head 621 is located below the bearing surface 210 as a whole, and the workpiece can pass above the check head 621. After the workpiece is separated from the terminal section 6212, the elastic piece 630 pushes the check head 621 to protrude out of the mounting groove 611, thereby playing a role of blocking the workpiece from retreating.

[0063] Please refer to Figure 1 and Figure 2 In some embodiments, the conveying device 001 further comprises a controller 700, the controller 700 being electrically connected to the lifting assembly 310 to control the movement of the lifting platform 320 along the third direction Z.

[0064] In some embodiments, the controller 700 is electrically connected to the conveying driving piece 400, the first driving piece 3111, the second driving piece 3112 and the third driving piece 540, thereby cooperatively controlling the lifting mechanism 300, the blocking mechanism 500 and the conveying belt assembly 200, and facilitating to improve the automation degree of the conveying device 001.

[0065] Please refer to Figures 1 to 7When the conveying mechanism conveys the workpiece, the workpiece enters the conveying device 001 from the previous station, the workpiece contacts the starting section 6211 of the check head 621, and gradually presses the terminal section 6212, when the terminal section 6212 is completely accommodated in the mounting groove 611, the check head 621 is located below the bearing surface 210 as a whole, and the workpiece can pass through the upper surface of the check head 621. After the workpiece is separated from the terminal section 6212, the elastic member 630 pushes the check head 621 to extend out of the mounting groove 611, thereby playing a function of blocking the workpiece from returning. At this time, the telescopic rod 541 pushes the blocking piece 520 to rise to the position where the blocking piece 520 intersects with the bearing surface 210, the blocking piece 520 blocks the workpiece from advancing, the lifting mechanism 300 lifts the workpiece to above the conveying belt assembly 200 and fixes it, which is beneficial to the machining of the workpiece. After the workpiece is machined, the lifting mechanism 300 lowers the workpiece, the support 320 moves to below the bearing surface 210, the workpiece is borne on the bearing surface 210 of the conveying belt assembly 200, at this time, the telescopic rod 541 descends, the blocking piece 520 descends to below the bearing surface 210 following the telescopic rod 541, the blocking piece 520 is in a passing state, and the workpiece can be conveyed by the conveying belt assembly 200 from above the blocking piece 520 to the next station.

[0066] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation to the present application, and as long as the above embodiments are within the spirit and scope of the present application, any appropriate changes and modifications of the above embodiments are within the disclosure range of the present application.

Claims

1. A delivery device characterized by, The device comprises: a mounting frame comprising a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate being spaced apart along a first direction; a conveying belt assembly arranged between the first mounting plate and the second mounting plate, the conveying belt assembly having a carrying surface for carrying a workpiece; a lifting mechanism comprising a lifting assembly and a support platform, the lifting assembly being arranged on the mounting frame, the support platform being located between the first mounting plate and the second mounting plate and being connected to the lifting assembly, the lifting assembly driving the support platform to move along a third direction, the third direction being perpendicular to the first direction, the support platform having a lifting state and an avoiding state; when the support platform is in the lifting state, the support platform is located above the carrying surface and is fixed, and the workpiece is fixed on the support platform; when the support platform is in the avoiding state, the support platform is located below the carrying surface, and the conveying belt assembly carries the workpiece.

2. The delivery device of claim 1, wherein, The lifting assembly comprises a lifting drive and a lifting frame, the lifting drive being arranged on the mounting frame, the lifting drive being connected to the lifting frame and driving the lifting frame to move along the third direction, the lifting frame being fixedly connected to the support platform.

3. The delivery device of claim 2, wherein, The lifting frame comprises a first support and a second support, and the lifting drive comprises a first drive and a second drive, the first drive being arranged on the first mounting plate and connected to the first support, the second drive being arranged on the second mounting plate and connected to the second support, the first support being slidingly connected to the first mounting plate along the third direction, and the second support being slidingly connected to the second mounting plate along the third direction; the first support has a first mounting position and a second mounting position, the second support has a third mounting position and a fourth mounting position, and the support platform is connected to the first mounting position, the second mounting position, the third mounting position and the fourth mounting position at the same time.

4. The delivery device of claim 3, wherein, The first support comprises a first sliding plate and a first connecting plate, the first sliding plate being located on a side of the first mounting plate away from the second mounting plate, the first sliding plate being slidingly connected to the first mounting plate along the third direction, the first connecting plate being connected to the first sliding plate, the first mounting position and the second mounting position being arranged on the first connecting plate, and a projection of the first connecting plate along the third direction being separated from the conveying belt assembly.

5. The delivery device of claim 1, wherein, The support platform comprises a bottom plate and a positioning plate, the bottom plate being connected to the lifting assembly, and the positioning plate being detachably connected to an upper surface of the bottom plate, the positioning plate being used for connecting the workpiece.

6. The delivery device of claim 5, wherein, The positioning plate comprises a plate body and a positioning column, the plate body being detachably connected to the bottom plate, the positioning column being arranged on an upper surface of the plate body, and the positioning column being used for limiting the workpiece.

7. The delivery device of claim 6, wherein, The conveying device further comprises a blocking mechanism, the blocking mechanism comprising a blocking mounting plate and a blocking piece, the blocking mounting plate being fixedly connected to the mounting frame, the blocking piece having a blocking state and a passing state, the blocking piece intersecting with the carrying surface when the blocking piece is in the blocking state to block the workpiece. When the blocking member is in the passing state, the blocking member is located below the bearing surface.

8. The delivery device of claim 7, wherein, The blocking mechanism further comprises a height adjusting plate and a third driving member, the height adjusting plate is adjustably arranged on the blocking mounting plate along the third direction, the third driving member is arranged on the height adjusting plate, the third driving member has a telescopic rod, and the blocking member is arranged on the telescopic rod.

9. The delivery device of claim 2, wherein, The conveying device further comprises a check mechanism, the check mechanism comprises a check mounting plate, a check member and an elastic member, the check mounting plate is arranged on the mounting frame, the check member is rotationally connected to the check mounting plate, the check member has a check head, the elastic member is connected to the check member, the check member has an elastic force for driving the check head to protrude from the check mounting plate, and the check head has a receiving state located below the bearing surface and a check state intersecting with the bearing surface.

10. The delivery device of claim 1, wherein, The conveying device further comprises a controller, the controller is electrically connected to the lifting assembly to control the lifting assembly to drive the movement of the supporting table along the third direction.

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