A blank piling device

Abstract

The utility model relates to a material blanking stacking device belongs to sheet material transport equipment field. Material blanking stacking device is used to bear after cutting device cutting sheet material, and material blanking stacking device includes bearing module and elevating system. Bearing module is located below the discharge line of cutting device, and elevating system is used to drive bearing module to move along the gravity direction to adjust the distance between bearing module and discharge port in the gravity direction, wherein, bearing module includes, rotating mechanism and transport line, and transport line sets up in the surface of rotating mechanism and is used for bearing sheet material to face the discharge line, and rotating mechanism is used to drive transport line to rotate to switch between the first position and the second position, when transport line is located first position, the wiring direction of transport line is perpendicular to the wiring direction of discharge line, when transport line is located first position, the wiring direction of transport line is parallel to the wiring direction of discharge line, and the rotation axis of rotating mechanism is parallel to the gravity direction.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal transportation equipment, and specifically relates to a material unloading and stacking device. Background Technology

[0002] In sheet metal production lines, unloading and stacking devices are generally used to stack sheet metal that has been completed and dropped in the previous process (such as the cutting process) layer by layer according to a preset, neat and stable pattern (i.e., "stack type") to form stacks that are easy to transport and store.

[0003] Existing unloading and palletizing devices can only lift and lower, not rotate or transport pallets. This limits the layout of the production line in the workshop, and forklifts or overhead cranes can only be used to transport the sheet metal to the unloading area. Utility Model Content

[0004] In view of the above problems, this application provides a material unloading and stacking device that can rotate and transport the formed stack while stacking sheet materials, thereby reducing the restrictions on the layout of the production line in the workshop.

[0005] This application provides a material unloading and stacking device for carrying sheet metal cut by a cutting device. The material unloading and stacking device includes a carrying module and a lifting mechanism. The carrying module is located below the discharge line of the cutting device; the lifting mechanism is used to drive the carrying module to move along the direction of gravity, so as to adjust the distance between the carrying module and the discharge port in the direction of gravity; wherein, the carrying module includes a rotating mechanism and a conveyor line, the conveyor line is disposed on the surface of the rotating mechanism facing the discharge line and is used to carry the sheet metal, the rotating mechanism is used to drive the conveyor line to rotate to switch between a first position and a second position; when the conveyor line is in the first position, the direction of the conveyor line is perpendicular to the direction of the discharge line; when the conveyor line is in the first position, the direction of the conveyor line is parallel to the direction of the discharge line, and the rotation axis of the rotating mechanism is parallel to the direction of gravity.

[0006] Specifically, during the stacking process, the transport line is driven to the first position by the rotating mechanism. At this time, the direction of the transport line is perpendicular to the direction of the discharge line and perpendicular to the direction of gravity. The length direction of the cut sheet is perpendicular to the direction of the discharge line. That is, the length direction of the cut sheet is parallel to the direction of the transport line at the first position. As the sheet falls continuously, the lifting mechanism drives the bearing module to move away from the discharge line along the direction of gravity, thereby causing the sheet to be continuously stacked.

[0007] After the stack is formed, the rotating mechanism drives the stack to rotate so that the conveyor line is in the second position. This makes the length direction of the material plate parallel to the direction of the discharge line, thereby reducing the risk of interference between the stack and the frame of the cutting device when the conveyor line moves the stack. Then the conveyor line drives the stack away from the bottom of the cutting device along the direction of the discharge line, making it easier to collect and transport. At the same time, the presence of a conveyor line facilitates connection with the production line of the packaging device or the unloading area. This allows the unloading and stacking device to complete the transfer between the cutting device and the packaging production line or between the cutting device and the unloading area, eliminating the need for overhead cranes or manual handling. This reduces the planning of the transportation route and thus reduces the restrictions on the layout of the production line in the workshop.

[0008] In some embodiments, the conveyor line includes a mounting frame, rollers, and a first drive assembly. The mounting frame is drivenly connected to a rotating mechanism and has a first surface facing the discharge line in the direction of gravity, the first surface being provided with a mounting opening; the rollers are at least partially disposed within the mounting openings and are a plurality of rollers spaced apart along the direction of the conveyor line, the rollers being used to carry sheet metal, and the rotation axes of the rollers, the direction of gravity, and the direction of the conveyor line are perpendicular to each other; the first drive assembly is mounted on the mounting frame and is used to drive the rollers to rotate.

[0009] In the above technical solution, by setting rollers to drive the sheet material movement, the risk of sheet material wear and belt wear leading to conveyor line damage is reduced compared to belt conveyor, thus improving the reliability of the unloading and palletizing device.

[0010] In some embodiments, at least a portion of the outer peripheral surface of the roller protrudes from the first surface; or, the outer peripheral surface of the roller is tangent to the first surface.

[0011] In the above technical solution, by making at least a portion of the outer peripheral surface of the roller protrude from the first surface, or by making the outer peripheral surface of the roller tangent to the first surface, the risk of interference between the edge of the sheet material and the mounting opening when the roller drives the sheet material to move is reduced, and the reliability of the sheet material transportation process is improved.

[0012] In some embodiments, the first drive assembly includes a first drive motor, a first sprocket, a second sprocket, and a chain. The first drive motor is disposed on the mounting frame; the first sprocket is disposed at the output end of the first drive motor, and the first drive motor is used to drive the first sprocket to rotate; the second sprocket is coaxially disposed with the roller; and the chain is sleeved on the first sprocket and the second sprocket.

[0013] In the above technical solution, the method of driving the first sprocket to rotate by the first drive motor, so that the chain drives the second sprocket and the roller to rotate, improves the accuracy of roller rotation compared to belt drive, thereby improving the accuracy of pallet transportation.

[0014] In some embodiments, the mounting frame has a second surface disposed opposite to the first surface, and the first drive motor is disposed on the second surface.

[0015] In the above technical solution, the risk of the sheet metal impacting the first drive motor is reduced by setting the first drive motor on the second surface.

[0016] In some embodiments, the rotating mechanism includes a top plate, a second drive motor, and a rotating main shaft. The top plate is drivenly connected to the lifting mechanism; the second drive motor is disposed on the top plate; one end of the rotating main shaft is rotatably disposed on the top plate and drivenly connected to the output end of the second drive motor, and the other end of the rotating main shaft is drivenly connected to the transport line. The second drive motor drives the transport line to switch between a first position and a second position by rotating the main shaft.

[0017] In the above technical solution, the method of driving the rotating main shaft to rotate by the second drive motor to drive the movement of the transport line is simple in structure and easy to implement.

[0018] In some embodiments, the rotating mechanism further includes a bracket. The bracket is sleeved on the rotating spindle and fixed relative to the rotating spindle, and the bracket is detachably connected to the transport line.

[0019] In the above technical solution, the rotating spindle and the transport line are connected by a bracket, and the bracket and the transport line are detachably connected, which facilitates the disassembly of the rotating mechanism and the transport line of the device, thereby facilitating the assembly, transportation and debugging of the load-bearing module.

[0020] In some embodiments, the lifting mechanism includes a chassis, a first bracket, a second bracket, and a second drive assembly. The chassis is located below a top plate; the first bracket has a first end and a second end disposed opposite to each other, the first end being hinged to the chassis, and the second end being movably disposed on the surface of the top plate facing the chassis; the middle portion of the second bracket is hinged to the middle portion of the first bracket, and the second bracket has a third end and a fourth end disposed opposite to each other, the third end being hinged to the top plate, and the fourth end being movably disposed on the surface of the chassis facing the top plate, the rotation axes of the first end and the rotation axes of the third end being spaced apart along the direction of gravity; the second drive assembly is used to drive the fourth end and the second end to move closer to each other and further apart.

[0021] In the above technical solution, the second drive component is used to drive the fourth end and the second end to move closer and further away from each other, thereby driving the chassis and the top plate to move closer and further away from each other, thus driving the conveyor line to move closer or further away from the discharge line. The structure is simple and easy to implement.

[0022] In some embodiments, the lifting mechanism further includes a first roller and a second roller. The first roller is rotatably disposed at the second end, and the periphery of the first roller abuts against the surface of the top plate facing the chassis; the second roller is rotatably disposed at the fourth end, and the periphery of the second roller abuts against the surface of the chassis facing the top plate.

[0023] In the above technical solution, by setting a first roller to convert the sliding friction between the second end and the top plate into rolling friction between the first roller and the top plate, the risk of wear on the second end is reduced. Similarly, by setting a second roller to convert the sliding friction between the fourth end and the bottom plate into rolling friction between the second roller and the bottom plate, the risk of wear on the fourth end is reduced. This improves the service life of the lifting mechanism.

[0024] In some embodiments, the second drive assembly includes a first hinge plate, a hydraulic cylinder, and a second hinge plate. One end of the first hinge plate is hinged to a first bracket and located between the middle of the first bracket and a second end; the hydraulic cylinder includes a cylinder body and a telescopic rod, the telescopic rod being telescopically disposed within the cylinder body, and the other end of the first hinge plate is hinged to the telescopic rod; one end of the second hinge plate is hinged to the cylinder body, and the other end of the second hinge plate is hinged to a second bracket and located between the middle of the second bracket and a fourth end.

[0025] In the above technical solution, the telescopic rod of the hydraulic cylinder is hinged to the first bracket by the first hinge plate and the cylinder body of the hydraulic cylinder is hinged to the second bracket by the second hinge plate. The structure is simple and easy to implement. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the material unloading and palletizing device provided in the embodiment of the present invention when it is in the second position. Detailed Implementation

[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Reference Figure 1 This application provides a material unloading and stacking device 100 for carrying sheet metal 300 cut by a cutting device. The material unloading and stacking device 100 includes a carrying module 20 and a lifting mechanism 10. The carrying module 20 is located below the discharge line 200 of the cutting device; the lifting mechanism 10 is used to drive the carrying module 20 to move along the gravity direction X, so as to adjust the distance between the carrying module 20 and the discharge port in the gravity direction X; wherein, the carrying module 20 includes a rotating mechanism 22 and a conveying line 21, the conveying line 21 is disposed on the surface of the rotating mechanism 22 facing the discharge line 200, and is used to carry the sheet metal 300, the rotating mechanism 22 is used to drive the conveying line 21 to rotate to switch between a first position and a second position; when the conveying line 21 is in the first position, the routing direction of the conveying line 21 is perpendicular to the routing direction of the discharge line 200; when the conveying line 21 is in the first position, the routing direction of the conveying line 21 is parallel to the routing direction of the discharge line 200, and the rotation axis of the rotating mechanism 22 is parallel to the gravity direction X.

[0033] Specifically, during the stacking process, the transport line 21 is driven by the rotating mechanism 22 to the first position. At this time, the direction of the transport line 21 is perpendicular to the direction of the discharge line 200 and perpendicular to the direction of gravity X. The length direction of the cut sheet 300 is perpendicular to the direction of the discharge line 200. That is, the length direction of the cut sheet 300 is parallel to the direction of the transport line 21 at the first position. As the sheet 300 continues to fall, the lifting mechanism 10 drives the bearing module 20 to move away from the discharge line 200 along the direction of gravity X, thereby causing the sheet 300 to be continuously stacked.

[0034] After the stack is formed, the rotating mechanism 22 drives the stack to rotate so that the transport line 21 is in the second position, thereby making the length direction of the material plate parallel to the direction of the discharge line 200. This reduces the risk of interference between the stack and the frame of the cutting device when the transport line 21 drives the stack to move. Then the transport line 21 drives the stack away from the bottom of the cutting device along the direction of the discharge line 200, making it easier to collect and transport. At the same time, since the transport line 21 is provided, it is easy to connect with the production line of the packaging device or the unloading area. This allows the unloading and stacking device 100 to complete the transfer between the cutting device and the packaging production line or between the cutting device and the unloading area, without the need for cranes or manual handling. This reduces the planning of the transport line 21 and reduces the restrictions on the layout of the production line in the workshop.

[0035] According to some embodiments of this application, the transport line 21 includes a mounting frame 211, rollers 212, and a first drive assembly 213. The mounting frame 211 is connected to the rotating mechanism 22 for transmission. The mounting frame 211 has a first surface 211A facing the discharge line 200 in the gravity direction X, and the first surface 211A is provided with a mounting opening. The rollers 212 are at least partially disposed in the mounting opening, and there are multiple rollers arranged at intervals along the running direction of the transport line 21. The rollers 212 are used to carry the sheet metal 300. The rotation axis of the rollers 212, the gravity direction X, and the running direction of the transport line 21 are perpendicular to each other. The first drive assembly 213 is mounted on the mounting frame 211 and is used to drive the rollers 212 to rotate.

[0036] In this technical solution, by setting roller 212 to drive the sheet metal 300 to move, compared with belt conveyor, the risk of the sheet metal 300 wearing off the belt and causing damage to the conveyor line 21 is reduced, and the reliability of the unloading and stacking device 100 is improved.

[0037] According to some embodiments of this application, at least a portion of the outer peripheral surface of the roller 212 protrudes from the first surface 211A; or, the outer peripheral surface of the roller 212 is tangent to the first surface 211A.

[0038] In this technical solution, by making at least a portion of the outer peripheral surface of the roller 212 protrude from the first surface 211A, or by making the outer peripheral surface of the roller 212 tangent to the first surface 211A, the risk of interference between the plate 300 and the edge of the mounting opening when the roller 212 drives the plate 300 to move is reduced, thereby improving the reliability of the plate 300 during transportation.

[0039] According to some embodiments of this application, the first drive assembly 213 includes a first drive motor 2131, a first sprocket 2132, a second sprocket 2133, and a chain. The first drive motor 2131 is disposed on the mounting frame 211; the first sprocket 2132 is disposed at the output end of the first drive motor 2131, and the first drive motor 2131 is used to drive the first sprocket 2132 to rotate; the second sprocket 2133 is coaxially disposed with the roller 212; and the chain is sleeved on the first sprocket 2132 and the second sprocket 2133.

[0040] For example, the first drive motor 2131 may be a hydraulic motor.

[0041] In this technical solution, the first drive motor 2131 drives the first sprocket 2132 to rotate, which in turn drives the chain to drive the second sprocket 2133 and the roller 212 to rotate. This improves the accuracy of the roller 212 rotation compared to the belt drive method, thereby improving the accuracy of the pallet transport.

[0042] According to some embodiments of this application, the mounting frame 211 has a second surface 211B disposed opposite to the first surface 211A, and the first drive motor 2131 is disposed on the second surface 211B.

[0043] In this technical solution, by setting the first drive motor 2131 on the second surface 211B, the risk of the sheet metal 300 hitting the first drive motor 2131 is reduced.

[0044] According to some embodiments of this application, the rotating mechanism 22 includes a top plate 221, a second drive motor 222, and a rotating main shaft 223. The top plate 221 is connected to the lifting mechanism 10; the second drive motor 222 is disposed on the top plate 221; one end of the rotating main shaft 223 is rotatably disposed on the top plate 221 and is connected to the output end of the second drive motor 222, and the other end of the rotating main shaft 223 is connected to the transport line 21. The second drive motor 222 drives the transport line 21 to switch between a first position and a second position by rotating the main shaft 223.

[0045] For example, the second drive motor 222 can be a hydraulic motor.

[0046] In this technical solution, the conveyor line 21 is driven to move by the rotation of the main shaft 223 driven by the second drive motor 222. The structure is simple and easy to implement.

[0047] According to some embodiments of this application, the rotating mechanism 22 further includes a bracket 224. The bracket 224 is sleeved on the outside of the rotating main shaft 223 and fixed relative to the rotating main shaft 223. The bracket 224 is detachably connected to the transport line 21.

[0048] For example, the bracket 224 can be detachably connected to the second surface 211B of the mounting frame 211 of the transport line 21 by bolts.

[0049] In this technical solution, the rotating spindle 223 and the transport line 21 are connected by the bracket 224, and the bracket 224 and the transport line 21 are detachably connected, which facilitates the disassembly of the rotating mechanism 22 and the transport line 21 of the device, thereby facilitating the disassembly, transportation and debugging of the carrying module 20.

[0050] According to some embodiments of this application, the lifting mechanism 10 includes a chassis 11, a first bracket 12, a second bracket 13, and a second drive assembly 14. The chassis 11 is located below the top plate 221; the first bracket 12 has a first end 12A and a second end 12B disposed opposite to each other, the first end 12A is hinged to the chassis 11, and the second end 12B is movably disposed on the surface of the top plate 221 facing the chassis 11; the middle portion of the second bracket 13 is hinged to the middle portion of the first bracket 12, and the second bracket 13 has a third end 13A and a fourth end 13B disposed opposite to each other, the third end 13A is hinged to the top plate 221, and the fourth end 13B is movably disposed on the surface of the chassis 11 facing the top plate 221, the rotation axis of the first end 12A and the rotation axis of the third end 13A are spaced apart along the gravity direction X; the second drive assembly 14 is used to drive the fourth end 13B and the second end 12B to move closer and further apart from each other.

[0051] In this technical solution, the second drive component 14 is used to drive the fourth end 13B and the second end 12B to move closer and further apart, thereby driving the chassis 11 and the top plate 221 to move closer and further apart, thus driving the conveyor line 21 to move closer or further away from the discharge line 200. The structure is simple and easy to implement.

[0052] According to some embodiments of this application, the lifting mechanism 10 further includes a first roller and a second roller. The first roller is rotatably disposed at the second end 12B, and the periphery of the first roller abuts against the surface of the top plate 221 facing the base plate 11; the second roller is rotatably disposed at the fourth end 13B, and the periphery of the second roller abuts against the surface of the base plate 11 facing the top plate 221.

[0053] In this technical solution, by setting a first roller to convert the sliding friction between the second end 12B and the top plate into rolling friction between the first roller and the top plate, the risk of wear on the second end 12B is reduced. Similarly, by setting a second roller to convert the sliding friction between the fourth end 13B and the bottom plate into rolling friction between the second roller and the bottom plate, the risk of wear on the fourth end 13B is reduced. This improves the service life of the lifting mechanism 10.

[0054] According to some embodiments of this application, the second drive assembly 14 includes a first hinge plate 141, a hydraulic cylinder 142, and a second hinge plate 143. One end of the first hinge plate 141 is hinged to the first bracket 12 and is located between the middle of the first bracket 12 and the second end 12B. The hydraulic cylinder 142 includes a cylinder body 1421 and a telescopic rod 1422, the telescopic rod 1422 being telescopically disposed within the cylinder body 1421, and the other end of the first hinge plate 141 is hinged to the telescopic rod 1422. One end of the second hinge plate 143 is hinged to the cylinder body 1421, and the other end of the second hinge plate 143 is hinged to the second bracket 13 and is located between the middle of the second bracket 13 and the fourth end 13B.

[0055] In this technical solution, the telescopic rod 1422 of the hydraulic cylinder 142 is hinged to the first bracket 12 by the first hinge plate 141, and the cylinder body 1421 of the hydraulic cylinder 142 is hinged to the second bracket 13 by the second hinge plate 143. The structure is simple and easy to implement.

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0057] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A material unloading and stacking device for carrying sheet metal cut by a cutting device, characterized in that, include: The support module is located below the output line of the cutting device; A lifting mechanism is used to drive the bearing module to move along the direction of gravity, so as to adjust the distance between the bearing module and the discharge port in the direction of gravity; The bearing module includes a rotating mechanism and a conveyor line. The conveyor line is disposed on the surface of the rotating mechanism facing the discharge line and is used to carry the sheet metal. The rotating mechanism drives the conveyor line to rotate to switch between a first position and a second position. When the conveyor line is in the first position, the direction of the conveyor line is perpendicular to the direction of the discharge line. When the conveyor line is in the second position, the direction of the conveyor line is parallel to the direction of the discharge line. The rotation axis of the rotating mechanism is parallel to the direction of gravity.

2. The material unloading and palletizing device according to claim 1, characterized in that, The transport line includes: The mounting frame is connected to the rotating mechanism in a transmission manner. The mounting frame has a first surface facing the discharge line in the direction of gravity, and the first surface is provided with a mounting port. Rollers, at least partially disposed within the mounting opening, and a plurality of them arranged at intervals along the direction of the transport line, are used to carry the sheet material, and the rotation axis of the rollers, the direction of gravity, and the direction of the transport line are perpendicular to each other; A first drive assembly is mounted on the mounting frame and is used to drive the roller to rotate.

3. The material unloading and palletizing device according to claim 2, characterized in that, At least a portion of the outer peripheral surface of the roller protrudes from the first surface; or, The outer circumferential surface of the roller is tangent to the first surface.

4. The material unloading and palletizing device according to claim 2, characterized in that, The first driving component includes: A first drive motor is disposed in the mounting frame; A first sprocket is disposed at the output end of the first drive motor, and the first drive motor is used to drive the first sprocket to rotate. The second sprocket is coaxially arranged with the roller; A chain is fitted over the first sprocket and the second sprocket.

5. The material unloading and palletizing device according to claim 4, characterized in that, The mounting frame has a second surface disposed opposite to the first surface, and the first drive motor is disposed on the second surface.

6. A material unloading and palletizing device according to any one of claims 1-5, characterized in that, The rotating mechanism includes: The top plate is connected to the lifting mechanism via a transmission connection; A second drive motor is mounted on the top plate; A rotating spindle is rotatably mounted on the top plate and connected to the output of the second drive motor. The other end of the rotating spindle is connected to the transport line. The second drive motor drives the transport line to switch between the first position and the second position through the rotating spindle.

7. The material unloading and palletizing device according to claim 6, characterized in that, The rotating mechanism further includes: The bracket is sleeved outside the rotating main shaft and fixed relative to the rotating main shaft. The bracket is detachably connected to the transport line.

8. The material unloading and palletizing device according to claim 6, characterized in that, The lifting mechanism includes: The chassis is located below the top plate; A first bracket has a first end and a second end disposed opposite to each other, the first end being hinged to the chassis, and the second end being movably disposed on the surface of the top plate facing the chassis; The second support is hinged to the middle of the first support. The second support has a third end and a fourth end that are arranged opposite to each other. The third end is hinged to the top plate, and the fourth end is movably disposed on the surface of the chassis facing the top plate. The rotation axis of the first end and the rotation axis of the third end are spaced apart along the direction of gravity. The second driving component is used to drive the second end and the fourth end to move closer and further apart.

9. The material unloading and palletizing device according to claim 8, characterized in that, The lifting mechanism also includes: A first roller is rotatably disposed at the second end, and the periphery of the first roller abuts against the surface of the top plate facing the chassis; The second roller is rotatably disposed at the fourth end, and the periphery of the second roller abuts against the surface of the chassis facing the top plate.

10. The material unloading and palletizing device according to claim 8, characterized in that, The second driving component includes: The first hinge plate is hinged at one end to the first bracket and is located between the middle of the first bracket and the second end. A hydraulic cylinder includes a cylinder body and a telescopic rod, wherein the telescopic rod is telescopically disposed within the cylinder body, and the other end of the first hinge plate is hinged to the telescopic rod; The second hinge plate has one end hinged to the cylinder body, and the other end of the second hinge plate is hinged to the second bracket and located between the middle of the second bracket and the fourth end.

Images