Automatic conveying line for rear box side plates

Abstract

The invention discloses a trunk sideboard automatic conveying line which comprises a sideboard conveying tackle used for positioning and placing a sideboard assembly. The device further comprises an air sliding rail, a ground lifting mechanism is arranged at the inlet end of the air sliding rail, a shifting mechanism is further arranged between the ground lifting mechanism and the inlet end of the air sliding rail, and the lifted sideboard conveying tackle is conveyed into the air sliding rail through the shifting mechanism. The conveying direction of the aerial sliding rail is the front-back direction, and conveying driving mechanisms are arranged on the left side and the right side of the aerial sliding rail and used for conveying the side plate conveying tackle from the inlet end to the outlet end; a positioning descending mechanism is arranged at the outlet end of the aerial sliding rail, an aerial displacement station is further arranged between the positioning descending mechanism and the outlet end of the aerial sliding rail, and the sideboard conveying tackle on the aerial sliding rail is conveyed into the positioning descending mechanism through the aerial displacement station. The mode of conveying from the ground to the air and then conveying from the air to the ground is adopted, so that the sideboard assembly is automatically conveyed in a limited space, and the rhythm requirement of high-speed production is met.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and particularly relates to an automatic conveying line for rear box side plates. Background Art

[0002] In the production of automobile rear boxes, due to the complex structure and large size of the side plate assembly, multiple workstations such as the outer plate assembly, inner plate assembly, and side plate assembly are required to complete the production, occupying a large amount of space. At the same time, it causes problems such as many times of workpiece logistics transfer, large space requirements, and high manual labor intensity.

[0003] Especially in the case of insufficient space in our company, there are also side plates of various length specifications that need to be produced and transported, making the problem of space requirements more prominent. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic conveying line for rear box side plates, which adopts the method of ground-to-air conveying and then to ground conveying, so as to realize the automatic conveying of the side plate assembly in a limited space.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: An automatic conveying line for rear box side plates includes a side plate conveying trolley, which is used to position and place the side plate assembly; It also includes an aerial slide rail. A ground lifting mechanism is provided at the inlet end of the aerial slide rail, and a displacement mechanism is further provided between the ground lifting mechanism and the inlet end of the aerial slide rail. The lifted side plate conveying trolley is sent into the aerial slide rail through the displacement mechanism; Taking the conveying direction of the aerial slide rail as the front-back direction, conveying driving mechanisms are provided on the left and right sides of the aerial slide rail, which are used to convey the side plate conveying trolley from the inlet end to the outlet end; A positioning and descending mechanism is provided at the outlet end of the aerial slide rail, and an aerial position-changing station is further provided between the positioning and descending mechanism and the outlet end of the aerial slide rail. The side plate conveying trolley on the aerial slide rail is sent into the positioning and descending mechanism through the aerial position-changing station.

[0006] Further, the conveying driving mechanism includes friction wheels and a conveying motor. A plurality of friction wheels are arranged along the conveying direction on the left and right sides of the aerial slide rail, and the friction wheels are driven to rotate by the conveying motor.

[0007] Further, the side plate conveying trolley includes a conveying bracket. Safety limit wheels are provided on the conveying bracket, and the safety limit wheels are in rolling cooperation with the aerial slide rail; friction plates are installed on the left and right sides of the conveying bracket, and the friction plates cooperate with the friction wheels to form conveying drive; A side plate positioning mechanism is installed on the conveying bracket. The side plate positioning mechanism includes a plurality of support blocks and positioning pins arranged on the tops of the support blocks, which are used to meet the positioning of rear box side plates of different length specifications.

[0008] Further, the slide rail body of the overhead slide rail is a V-shaped guide rail, and the safety limit wheel is a matching V-shaped grooved wheel.

[0009] Further, one section of the overhead slide rail is a double-group guide rail, which are respectively a main guide rail and a spare guide rail. The main guide rail is connected to the overhead slide rail, and the spare guide rail is parallel to the overhead slide rail; The overhead slide rail is a displacement guide rail at the front and rear sections of the main guide rail. The displacement guide rails are respectively connected with displacement cylinders arranged in the left-right direction. The displacement cylinders drive the displacement guide rails to move left and right, so that the displacement guide rails are connected to the overhead slide rail or to the spare guide rail.

[0010] Further, the ground lifting mechanism includes a vertically arranged lifting frame. Two groups of lifting suspension rails extending up and down are provided on the lifting frame. A lifting frame is slidably installed on the lifting suspension rails in the up-down direction, and safety hooks are installed at both horizontal ends of the lifting frame; The safety hook is L-shaped, one end of which is connected to a safety cylinder, and it is rotatably installed on the lifting frame in the middle, and the other end is used as a locking end; a hanger position corresponding to the locking end is provided on the side plate conveying trolley; A lifting drive mechanism is also installed on the lifting frame, and the lifting drive mechanism drives the lifting frame to move up and down along the lifting suspension rails.

[0011] Further, the shifting mechanism includes a moving slide rail provided on the lifting frame. A shifting platform slidably matched with it is installed on the moving slide rail. A shifting track is installed on the shifting platform. The moving platform is connected to a shifting cylinder, and the shifting cylinder drives the moving platform to move along the moving slide rail, so that the shifting track is connected to or separated from the overhead slide rail; Friction wheels are also provided on the shifting platform beside the shifting track, and the friction wheels are driven by a friction motor.

[0012] Further, the positioning and descending mechanism includes a vertically arranged descending frame. Two groups of descending suspension rails extending up and down are provided on the descending frame. A bracket is slidably installed on the descending suspension rails in the up-down direction, and a receiving guide rail is installed on the bracket; A descending drive mechanism is also installed on the descending frame, and the descending drive mechanism drives the bracket to move up and down along the descending suspension rails; Friction wheels are also provided on the bracket beside the receiving guide rail, and the friction wheels are driven by a friction motor.

[0013] Further, the overhead displacement station includes a rotating platform arranged at the outlet end of the overhead slide rail. The rotating platform is driven by a rotating motor below to rotate; a rotating guide rail is installed on the rotating platform. Through the rotation of the rotating platform, the rotating guide rail is driven to be docked with the overhead slide rail or with the receiving guide rail on the positioning and descending mechanism; Friction wheels are also provided on the rotating platform beside the rotating guide rail, and the friction wheels are driven by a friction motor.

[0014] Further, the rotary platform and the bracket are respectively provided with locking mechanisms for the side plate conveying trolley.

[0015] Advantages of the present invention: The present invention realizes the conveying mode of the rear box side plate from the ground to the air and then to the ground, enabling the automatic conveying of the side plate assembly in a limited space. It not only ensures meeting the rhythm requirements of high-speed production but also minimizes the complexity of the mechanism, reduces the number of conveying trolleys, lowers the investment, and solves the problems of insufficient current site and manual transportation of workpieces. Description of the drawings

[0016] Figure 1 is the overall front view of the present invention; Figure 2 is the overall top view of the present invention; Figure 3 is the side view of the ground lifting mechanism in the present invention; Figure 4 is the side view of the aerial slide rail at the double-group guide rail part in the present invention; Figure 5 is the schematic diagram of the side plate conveying trolley in the present invention.

[0017] The drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Detailed implementation manners

[0018] The following will describe in detail the specific implementation manners of the present invention with reference to the drawings. It should be understood that the specific implementation manners described herein are only for explaining and illustrating the present invention and are not used to limit the present invention.

[0019] As Figures 1 to 5 shown, this embodiment discloses an automatic conveying line for rear box side plates, mainly composed of a side plate conveying trolley, a ground lifting mechanism, a displacement mechanism, an aerial slide rail 1, a conveying drive mechanism, an aerial displacement station, a positioning and descending mechanism, and a control system.

[0020] The side plate conveying trolley is mainly used for positioning and placing the side plate assembly. Specifically, the side plate conveying trolley includes a conveying bracket 4, on which safety limit wheels 6 are provided, and the safety limit wheels 6 are in rolling cooperation with the aerial slide rail 1; friction plates 5 are installed on the left and right sides of the conveying bracket 4.

[0021] A side plate positioning mechanism is installed on the conveying bracket 4. The side plate positioning mechanism includes a plurality of support blocks 7 and positioning pins 8 provided on the tops of the support blocks 7, which are used to meet the positioning of rear box side plate assemblies 3 of different length specifications.

[0022] In this embodiment, the safety limit wheels 6 are installed on the left and right sides of the conveying bracket 4, with a set in the front and a set in the back, and are in rolling contact with the overhead slide rail 1 (the overhead slide rail 1 is a double slide rail). To achieve limiting, the slide rail body of the overhead slide rail 1 is a V-shaped guide rail, and the safety limit wheels 6 are V-grooved wheels for cooperation.

[0023] In other embodiments, in order to prevent the side overturning of the side plate conveying trolley caused by abnormalities, an uncontacted safety limit can be provided on the lower side of the overhead slide rail 1.

[0024] The layout relationship of the ground lifting mechanism, the displacement mechanism, the overhead slide rail, the conveying drive mechanism, the overhead position-changing station, and the positioning and lowering mechanism is as follows: Taking the conveying direction of the overhead slide rail 1 as the front-back direction, conveying drive mechanisms are provided on the left and right sides of the overhead slide rail 1 for conveying the side plate conveying trolley from the inlet end to the outlet end. Specifically, the conveying drive mechanism includes friction wheels 201 and a conveying motor 202. A plurality of friction wheels 201 are arranged along the conveying direction on the left and right sides of the overhead slide rail 1. The friction wheels 201 are driven by the conveying motor 202 to rotate, and the friction wheels 201 cooperate with the friction plate 5 to form the conveying drive.

[0025] A ground lifting mechanism is provided at the inlet end of the overhead slide rail 1. A displacement mechanism is provided between the ground lifting mechanism and the inlet end of the overhead slide rail 1. The lifted side plate conveying trolley is sent into the overhead slide rail 1 through the displacement mechanism.

[0026] A positioning and lowering mechanism is provided at the outlet end of the overhead slide rail. An overhead position-changing station is also provided between the positioning and lowering mechanism and the outlet end of the overhead slide rail. The side plate conveying trolley on the overhead slide rail is sent into the positioning and lowering mechanism through the overhead position-changing station.

[0027] Specifically, the ground lifting mechanism includes a vertically arranged lifting frame 91. Two groups of vertically extending lifting suspension rails 111 are provided on the lifting frame 91. A lifting frame 11 is slidably installed on the lifting suspension rails 111 in the up-down direction. Safety hooks 13 are installed at both horizontal ends of the lifting frame 11.

[0028] The safety hook 13 is L-shaped. One end of it is connected to the safety cylinder 12, and it is rotatably installed in the middle on the lifting frame 11, and the other end is used as the locking end. A hanger position corresponding to the locking end is provided on the conveying bracket 4. The safety cylinder 12 can drive the safety hook 13 to rotate to lock or separate the hanger position on the conveying bracket 4.

[0029] A lifting drive mechanism is installed at the top of the lifting frame 91. The lifting drive mechanism includes a lifting motor 10. The lifting motor 10 is connected to a suspension cable or a ball screw, and further drives the lifting frame 11 to move up and down along the lifting suspension rails 111.

[0030] Specifically, the displacement mechanism includes a moving slide rail 16 provided on the lifting frame 91. A displacement platform is installed on the moving slide rail 16 and is slidably engaged therewith. A displacement track 17 is installed on the displacement platform. The moving platform is also connected to a displacement cylinder 15. The displacement cylinder 15 drives the moving platform to move along the moving slide rail 16, so that the displacement track 17 is connected to or separated from the aerial slide rail 1.

[0031] In order to prevent the side plate conveying trolley from derailing after being conveyed to the position, a limiting plate 14 is also provided at the end position of the displacement track 17.

[0032] Friction wheels are also provided on the displacement platform beside the displacement track. The friction wheels are driven by a friction motor and are used to realize the conveyance of the side plate conveying trolley between the displacement track 17 and the aerial slide rail 1.

[0033] The positioning and descending mechanism includes a vertically arranged descending frame 92. Two sets of vertically extending descending suspension rails 112 are provided on the descending frame 92. A bracket 23 is slidably installed on the descending suspension rails 112 in the vertical direction. A receiving guide rail 26 is installed on the bracket 23.

[0034] Friction wheels are also provided on the bracket 23 beside the receiving guide rail 26. The friction wheels are driven by a friction motor and are used to realize the conveyance of the side plate conveying trolley between the rotating guide rail 27 and the receiving guide rail 26.

[0035] A descending drive mechanism is also installed at the top of the descending frame 92. The descending drive mechanism includes a descending motor 22. The descending motor 22 is connected to a sling or a ball screw, and further drives the bracket 23 to move up and down along the descending suspension rails 112.

[0036] Specifically, the aerial displacement station includes a rotating platform 19 provided at the outlet end of the aerial slide rail 1. The rotating platform 19 is driven by a rotating motor 18 below to rotate; a rotating guide rail 27 is installed on the rotating platform 19. Through the rotation of the rotating platform 19, the rotating guide rail 27 is connected to the aerial slide rail 1 or to the receiving guide rail 26 on the positioning and descending mechanism.

[0037] Friction wheels are also provided on the rotating platform beside the rotating guide rail 27. The friction wheels are driven by a friction motor and are used to realize the conveyance of the side plate conveying trolley between the rotating guide rail 27 and the aerial slide rail 1, the receiving guide rail 26.

[0038] A first locking mechanism for the side plate conveying trolley is also provided on the rotating platform 19. The first locking mechanism includes a locking cylinder 21 and a locking limit block 20. The locking cylinder 21 drives the locking limit block 20 to position and lock the side plate conveying trolley.

[0039] In this embodiment, the locking cylinder 21 forms a certain angle with the rotary guide rail 27. The locking limit block 20 is a clamping block with a positioning pin, and there is an oblong positioning hole and a corresponding positioning plane on the side plate conveying trolley corresponding thereto.

[0040] A second locking mechanism is provided on the bracket 23, and the second locking mechanism is used to position and lock the side plate conveying trolley. The related settings and components of the second locking mechanism are the same as those of the first locking mechanism.

[0041] In order to meet the rhythm requirements of high-speed production, multiple groups of side plate conveying trolleys can operate simultaneously in this embodiment. In order to avoid interference between the side plate conveying trolleys in two directions on the aerial slide rail, a spare guide rail and a variable-position guide rail are provided on the aerial slide rail in this embodiment.

[0042] Specifically, a section of the aerial slide rail 1 is a double-group guide rail, which are respectively the main guide rail 101 and the spare guide rail 102. The main guide rail 101 is connected to the aerial slide rail, and the spare guide rail 102 is parallel to the aerial slide rail; The aerial slide rail 1 is respectively a variable-position guide rail 103 and a variable-position guide rail 105 at the front and rear sections of the main guide rail. The variable-position guide rail 103 and the variable-position guide rail 105 are respectively connected with variable-position cylinders 104 and 106 arranged in the left-right direction. The variable-position cylinders drive the variable-position guide rails to move left and right, so that the variable-position guide rails are connected to the aerial slide rail 1 or to the spare guide rail 102.

[0043] Specifically, the control system controls the sequential actions of each mechanism through a PLC controller 24, a sensor 25, etc., to realize the automatic conveying of the workpiece from the ground to the air and then to the ground.

[0044] The working principle of the present invention is as follows: When the operator places the rear box side plate assembly 3 on the side plate conveying trolley, the support block 7 and the positioning pin 8 thereon position the workpiece to ensure the consistency of the side plate position. The side plate conveying trolley moves to the lifting mechanism area. The safety hook 13 connected to the safety cylinder 12 is opened. After the lifting motor 10 lowers the lifting frame 11 in place, at this time, the safety hook 13 on the lifting frame 11 enters the lug position on the side plate conveying trolley, and the safety cylinder 12 acts to interlock the rotatable safety hook 13 with the lug position. Then the lifting motor 10 raises the lifting frame 11, driving the side plate conveying trolley and the side plate to move up in place.

[0045] The shifting cylinder 15 drives the shifting track 17 to move under the side plate conveying trolley. The lifting motor 10 descends again to place the side plate conveying trolley on the shifting track 17. The safety cylinder 12 acts to open the movable safety hook 13, and the lifting motor 10 ascends again to separate the safety hook 13 from the conveying trolley. The conveying motor 202 drives the friction wheel 201 thereon to act with the friction plate 5 on the side plate conveying trolley to drive the side plate conveying trolley forward until the side plate conveying trolley moves onto the rotating track 19 in the aerial position-changing station. The locking cylinder 21 drives the locking limit block 20 to position and lock the conveying trolley, and then the rotating motor 18 acts to move the rotating track 19 and the conveying trolley above it to the lowering mechanism area.

[0046] Then the locking cylinder 21 drives the locking limit block 20 to open the side plate conveying trolley from the locked state. The conveying motor 2 operates to move the side plate conveying trolley onto the bracket 23 and contact the limit block for limiting. The locking cylinder on the bracket 23 drives the locking limit block to position and lock the side plate conveying trolley. Then the lowering motor 22 operates to lower the bracket 23 and the side plate conveying trolley thereon to the working area. After the operator removes the side plate, the lowering motor 22 operates to raise the bracket 23 and the side plate conveying trolley thereon to the original position. The locking cylinder on the bracket 23 drives the locking limit block to open the side plate conveying trolley from the locked state. The conveying motor 2 operates to return the side plate conveying trolley from the bracket 23 to the rotating track 19 in the position-changing mechanism. The locking cylinder 21 of the aerial position-changing station drives the locking limit block 20 to position and lock the side plate conveying trolley, and then the rotating motor 18 acts to reset the rotating track 19 and the side plate conveying trolley above it to be combined with the aerial slide rail 1.

[0047] When the side plate conveying trolley enters the position-changing guide rail 103, the position-changing cylinder 104 moves the position-changing guide rail 103 outward. At this time, the position-changing guide rail 103 is docked with the spare guide rail 102. The friction wheel 201 works to move the side plate conveying trolley backward. After moving out of the area of the position-changing guide rail 103, the position-changing cylinder 104 resets the position-changing guide rail 103. The side plate conveying trolley waiting on the main guide rail 101 moves forward along the track into the aerial position-changing station. At the same time, the position-changing cylinder 106 moves the position-changing guide rail 105 outward to dock the position-changing guide rail 105 with the spare guide rail 102. The side plate conveying trolley on the spare guide rail 102 moves backward to the position-changing guide rail 105, and then the position-changing cylinder 106 acts to drive the position-changing guide rail 105 to reset and dock with the main guide rail 101. After that, the side plate conveying trolley continues to move along the aerial slide rail 1 to the ground lifting mechanism area.

[0048] After the side plate conveying trolley enters the area of the ground lifting mechanism, after the lifting motor 10 lowers the lifting frame 11 in place, at this time, the safety hook 13 on the lifting frame 11 enters the lug position on the side plate conveying trolley, and the safety cylinder 12 acts to cooperate and interlock the rotatable safety hook 13 with the lug position. Then, the lifting motor 10 raises the lifting frame 11, driving the side plate conveying trolley to move upward in place. The shifting cylinder 15 acts to drive the shifting guide rail 17 to reset. The lifting motor 10 lowers the lifting frame 11 to the ground, and the safety cylinder 12 acts to open the movable safety hook 13. The lifting motor 10 rises again to separate the safety hook 13 from the side plate conveying trolley. The side plate conveying trolley falls on the lower moving platform and then moves to the side plate assembly working area. After the operator places the new side plate assembly in place, the moving platform moves the side plate conveying trolley into the ground lifting mechanism. By repeating the above operation steps, the rear box side plate assembly can be automatically conveyed; the number of side plate conveying trolleys can be set according to the required production rhythm. Distributing the required side plate conveying trolleys on the air slide rail can meet the normal production requirements. The control system transmits the positions of each side plate conveying trolley to the PLC 25 through the sensor 24; the PLC 25 determines whether each operation unit works according to different requirements to realize the automation of conveying.

[0049] The present invention can adopt the method of conveying from the ground to the air and then back to the ground, enabling the side plate assembly to be automatically conveyed in a limited space, while meeting the rhythm requirements of high-speed production, and minimizing the investment, eliminating the requirements for site, material transfer and manual operation costs.

[0050] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

[0051] If terms such as "first" and "second" are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description. Without additional declaration, the above terms have no special meaning.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An automatic conveying line for rear box side panels, characterized by: It includes a side plate conveying pulley, which is used for positioning and placing the side plate assembly; It also includes an aerial slide rail, the entrance end of the aerial slide rail is provided with a ground lifting mechanism, and a shifting mechanism is provided between the ground lifting mechanism and the entrance end of the aerial slide rail, and the lifted side plate conveying pulley is sent into the aerial slide rail through the shifting mechanism; Taking the conveying direction of the aerial slide as the front-to-back direction, conveying drive mechanisms are provided on the left and right sides of the aerial slide to convey the side plate conveying pulley from the entrance end to the exit end; A positioning and descending mechanism is provided at the exit end of the aerial slide rail, and an aerial position changing station is provided between the positioning and descending mechanism and the exit end of the aerial slide rail, through which the side plate conveying pulley on the aerial slide rail is sent into the positioning and descending mechanism.

2. The rear box side panel automatic conveying line according to claim 1 is characterized by: The conveying drive mechanism comprises friction wheels and a conveying motor. A plurality of friction wheels are arranged on the left and right sides of the aerial slide rail along the conveying direction, and the friction wheels are driven to rotate by the conveying motor.

3. The rear box side panel automatic conveying line according to claim 2 is characterized by: The side plate conveying pulley comprises a conveying bracket, on which a safety limit wheel is provided, and the safety limit wheel is in rolling cooperation with the aerial slide rail; friction plates are installed on the left and right sides of the conveying bracket, and the friction plates cooperate with the friction wheels to form a conveying drive; A side plate positioning mechanism is installed on the conveying bracket. The side plate positioning mechanism includes multiple support blocks and positioning pins arranged on the top of each support block to meet the positioning of rear box side plates of different length specifications.

4. The rear box side panel automatic conveying line according to claim 3 is characterized by: The slide rail body of the aerial slide rail is a V-shaped guide rail, and the safety limit wheel is a matching V-shaped groove wheel.

5. The rear box side panel automatic conveying line according to claim 1 is characterized by: One section of the aerial slide rail is a double set of guide rails, which are a main guide rail and a spare guide rail. The main guide rail is connected to the aerial slide rail, and the spare guide rail is parallel to the aerial slide rail. The front and rear sections of the aerial slide rails at the main guide rail are displacement guide rails, which are respectively connected to displacement cylinders arranged in the left and right directions. The displacement cylinders drive the displacement guide rails to move left and right, so that the displacement guide rails are connected to the aerial slide rails or to the spare guide rails.

6. The automatic conveying line for rear box side panels according to any one of claims 1 to 5, characterized in that: The ground lifting mechanism comprises a vertically arranged lifting frame, on which two sets of lifting rails extending up and down are arranged, on which a lifting frame is slidably mounted in the up and down directions, and safety hooks are respectively mounted at both horizontal ends of the lifting frame; The safety hook is L-shaped, one end of which is connected to the safety cylinder, the middle is rotatably installed on the lifting frame, and the other end is used as the locking end; a lifting lug position is provided on the side plate conveying pulley corresponding to the locking end; A lifting drive mechanism is also installed on the lifting frame, and the lifting drive mechanism drives the lifting frame to move up and down along the lifting hanging rail.

7. The rear box side panel automatic conveying line according to claim 6 is characterized by: The shift mechanism includes a movable slide rail arranged on the lifting frame, a shift platform slidably matched with the movable slide rail is installed on the movable slide rail, a shift track is installed on the shift platform, the movable platform is connected to the shift cylinder, and the movable platform is driven by the shift cylinder to move along the movable slide rail, so that the shift track is connected to or leaves the aerial slide rail; A friction wheel is also provided on the shifting platform beside the shifting track, and the friction wheel is driven by a friction motor.

8. The rear box side panel automatic conveying line according to any one of claims 1 to 5, characterized in that: The positioning and descending mechanism comprises a vertically arranged descending frame, on which two sets of descending hanging rails extending up and down are arranged, and a bracket is slidably mounted on the descending hanging in the up and down directions, and a receiving guide rail is mounted on the bracket; The descending frame is also provided with a descending driving mechanism, which drives the bracket to move up and down along the descending hanging rail; The bracket is also provided with a friction wheel beside the receiving guide rail, and the friction wheel is driven by a friction motor.

9. The rear box side panel automatic conveying line according to claim 8 is characterized by: The aerial position changing station includes a rotating platform arranged at the exit end of the aerial slide rail, which is driven to rotate by a rotating motor below; a rotating guide rail is installed on the rotating platform, and the rotating guide rail is driven to dock with the aerial slide rail or the receiving guide rail on the positioning and descending mechanism through the rotation of the rotating platform; A friction wheel is also arranged on the rotating platform beside the rotating guide rail, and the friction wheel is driven by a friction motor.

10. The rear box side panel automatic conveying line according to claim 9 is characterized in that: The rotating platform and the bracket are respectively provided with locking mechanisms for the side plate conveying pulley.

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