An extruder for wires and cables

Abstract

The present invention discloses an extruder for electric wires and cables, and the present invention relates to the field of cable extrusion technology, comprising a bottom plate, a top side wall of the bottom plate fixedly connected to a heating shell, inner walls at both ends of the heating shell rotatably connected to the same screw, and a side wall at one end of the heating shell fixedly connected to a conveying motor. The present invention can, when it is necessary to coat multiple twisted cables with the same sheath layer, use a limiting plate and a limiting wheel to limit the outside of the multiple twisted cables at both ends of a mold, ensuring that the multiple twisted cables are located at the center of the mold, and can continuously adjust the angle and position of the limiting wheel during the continuous movement of the multiple twisted cables, ensuring that the limiting wheel can always contact the outer wall of the corresponding cable, so that the limiting wheel can always limit the outer wall of the corresponding cable during the movement of the multiple twisted cables, avoiding the unstable position of the multiple twisted cables resulting in uneven thickness of the extruded sheath, thereby affecting product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of cable extrusion, and in particular relates to an extruder for electric wires and cables. Background Art

[0002] Extruder, also known as extruder, is a wire and cable equipment mainly used for extruding the core wires of power cables, power cables, coaxial cables, communication cables, transmission cables, BV civil cables, various high-temperature silicone cables, Teflon cables, coaxial cables, optical fibers and other wires and cables.

[0003] When the extruder uses a mold to wrap a layer of cable sheath around the wires and cables, it usually uses a traction device to transport a single cable into the mold to achieve cable coating. However, in order to reduce the complexity of subsequent wiring and make more efficient use of space, multiple cables will be wrapped together in the same sheath layer to form a whole. At the same time, in order to ensure that multiple cables can be arranged neatly before being coated and avoid disorder, multiple cables will be twisted on a specific twisting machine. Then, the cable extruder is used to wrap the multiple twisted cables with a sheath layer. However, when the traction device is used to pull the multiple twisted cables, the surface of the twisted cables is rougher than that of a single cable, and there are more protrusions on the surface. When the fixed ring in the traction device is used to fix and pull the twisted cables, a large fixing force is likely to cause damage to the cable surface. When the fixing force is small, the twisted cables are likely to shake inside the fixing ring during the traction process, resulting in unstable cable position. The unstable cable position will lead to uneven thickness of the extruded sheath, affecting product quality and reducing the reliability and production effect of cable extrusion.

[0004] Therefore, we propose an extruder for wires and cables to solve the above problems. Summary of the Invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An extruder for wires and cables comprises a base plate, the top side wall of the base plate is fixedly connected to a heating shell, the inner walls at both ends of the heating shell are rotatably connected to the same screw, one end side wall of the heating shell is fixedly connected to a conveying motor, the output end of the conveying motor passes through the side wall of the heating shell and is fixedly connected to one end of the screw, the top side wall of the heating shell is provided with an opening, and a feed hopper is fixedly connected to the corresponding opening, the top side wall of the base plate is fixedly connected to a mold, one end side wall of the heating shell is provided with a through hole, and an output pipe is fixedly connected to the corresponding through hole, one end of the output pipe passes through the side wall of the mold and extends to the internal cavity of the mold, the inner wall of the mold is provided with a plurality of discharge holes, and solenoid valves are provided inside the corresponding discharge holes, the top side wall of the base plate is fixedly connected to a limiting assembly, the top side wall of the base plate is provided with a conveying assembly, and the top side wall of the base plate is provided with a traction assembly.

[0007] Preferably, the limiting assembly includes a limiting ring fixedly connected to the top side wall of the base plate, the inner wall of the limiting ring is provided with a first groove, the inner wall of the first groove is fixedly connected to a first electric slide rail, the inner wall of the first electric slide rail is rotatably connected to a sliding ring, the inner wall of the sliding ring is provided with a second groove, the inner wall of the second groove is fixedly connected to a second electric slide rail, and the inner wall of the second electric slide rail is rotatably connected to a plurality of first slides.

[0008] Preferably, one end side wall of the plurality of first skateboards is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a first electric telescopic rod, the telescopic end of the first electric telescopic rod is fixedly connected to a first U-plate, the inner walls at both ends of the first U-plate are fixedly connected to a second electric telescopic rod, the telescopic ends of the second electric telescopic rod are fixedly connected to side plates, and the bottom end side walls of the side plates are rotatably connected to limit wheels.

[0009] Preferably, the conveying assembly includes two groups of third grooves opened on the top side wall of the base plate, each group of the third grooves has two, the inner walls of the third grooves are fixedly connected with a third electric slide rail, the top side walls of the third electric slide rail are slidably connected with a third slide plate, the top side walls of each group of the third slide plates are fixedly connected with a support rod, one end of each group of the support rods is fixedly connected to the same conveying ring, the inner wall of the conveying ring is provided with a fourth groove, and the inner wall of the fourth groove is fixedly connected with the fourth electric slide rail.

[0010] Preferably, the inner wall of the fourth electric slide rail is slidably connected to a plurality of fourth slides, the side walls of one end of the fourth slide are fixedly connected to the second motor, the output ends of the second motors are fixedly connected to the third electric telescopic rod, the telescopic ends of the third electric telescopic rods are fixedly connected to the second U-plate, the inner walls at both ends of the second U-plate are fixedly connected to the fourth electric telescopic rods, and the telescopic ends of the fourth electric telescopic rods are fixedly connected to the fixed plates.

[0011] Preferably, the traction assembly includes two connecting rods symmetrically fixedly connected to the side walls of the top end of the base plate, one end of the connecting rods is fixedly connected to a connecting plate, one end side wall of the connecting plate is fixedly connected to a fifth electric telescopic rod, the telescopic end of the fifth electric telescopic rod is fixedly connected to a limiting plate, and one end side wall of the mold is fixedly connected to a cooling ring.

[0012] Preferably, two groups of fifth grooves are opened on the top side wall of the base plate, each group of the fifth grooves has two, the inner walls of the fifth grooves are fixedly connected with the fifth electric slide rail, and the top side walls of the fifth electric slide rail are slidably connected with the fifth slide plate.

[0013] Preferably, the top side wall of the fifth slide is fixedly connected to a side rod, one end of the side rod is fixedly connected to a fixed block, one end side wall of the fixed block is fixedly connected to a sixth electric telescopic rod, and the telescopic ends of the sixth electric telescopic rod are fixedly connected to a traction plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The limit assembly, conveying assembly and traction assembly set up can limit the outside of the multiple twisted cables at both ends of the mold by using the limit plate and the limit wheel when it is necessary to cover multiple twisted cables with the same sheath layer, ensuring that the multiple twisted cables are located in the center of the mold, and can continuously adjust the angle and position of the limit wheel during the continuous movement of the multiple twisted cables to ensure that the limit wheel can always contact the outer wall of the corresponding cable, so that the limit wheel can always limit the outer wall of the corresponding cable during the movement of the multiple twisted cables, avoiding the unstable position of the multiple twisted cables resulting in uneven thickness of the extruded sheath, affecting product quality, and at the same time, can use the fixed plate and the traction plate to continuously pull and convey the multiple twisted cables, ensuring that the outer wall of the cable can be continuously covered with the sheath layer, greatly improving the reliability and production effect of the device when extruding the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention from other angles;

[0018] Figure 3 For the present invention Figure 2 A magnified view of part A;

[0019] Figure 4 Schematic diagram of part of the structure of the present invention Figure 1 ;

[0020] Figure 5 Schematic diagram of part of the structure of the present invention Figure 2 ;

[0021] Figure 6 Schematic diagram of part of the structure of the present invention Figure 3 .

[0022] In the figure: 1, bottom plate; 2, heating shell; 3, screw; 4, conveying motor; 5, feed hopper; 6, mold; 7, output pipe; 8, discharge hole; 9, solenoid valve; 10, limit assembly; 101, limit ring; 102, first groove; 103, first electric slide rail; 104, slide ring; 105, second groove; 106, second electric slide rail; 107, first slide plate; 108, first motor; 109, first electric telescopic rod; 1010, first U plate; 1011, second electric telescopic rod; 1012, side plate; 1013, limit wheel; 11, conveying assembly; 111, third groove; 112, third electric slide rail; 113, Third slide; 114, support rod; 115, conveying ring; 116, fourth groove; 117, fourth electric slide; 118, fourth slide; 119, second motor; 1110, third electric telescopic rod; 1111, second U-plate; 1112, fourth electric telescopic rod; 1113, fixed plate; 12, traction assembly; 121, connecting rod; 122, connecting plate; 123, fifth electric telescopic rod; 124, limit plate; 125, cooling ring; 126, fifth groove; 127, fifth electric slide; 128, fifth slide; 129, side rod; 1210, fixed block; 1211, sixth electric telescopic rod; 1212, traction plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] The following electrical components are all electrically connected to the peripheral PLC controller.

[0025] Reference Figure 1 - Figure 6, an extruder for wires and cables, comprising a bottom plate 1, the top side wall of the bottom plate 1 is fixedly connected to a heating shell 2, the inner walls at both ends of the heating shell 2 are rotatably connected to the same screw 3, one end side wall of the heating shell 2 is fixedly connected to a conveying motor 4, the output end of the conveying motor 4 passes through the side wall of the heating shell 2 and is fixedly connected to one end of the screw 3, the top side wall of the heating shell 2 is provided with an opening, and a feed hopper 5 is fixedly connected to the corresponding opening, the top side wall of the bottom plate 1 is fixedly connected to a mold 6, one end side wall of the heating shell 2 is provided with a through hole, and an output pipe 7 is fixedly connected to the corresponding through hole, one end of the output pipe 7 passes through the side wall of the mold 6 and extends to the internal cavity of the mold 6, the inner wall of the mold 6 is provided with a plurality of discharge holes 8, and electromagnetic valves 9 are provided inside the corresponding discharge holes 8, the top side wall of the bottom plate 1 is fixedly connected to a limiting component 10, the top side wall of the bottom plate 1 is provided with a conveying component 11, and the top side wall of the bottom plate 1 is provided with a traction component 12.

[0026] In the embodiment, the limiting assembly 10 includes a limiting ring 101 fixedly connected to the top side wall of the base plate 1, the inner wall of the limiting ring 101 is provided with a first groove 102, the inner wall of the first groove 102 is fixedly connected to a first electric slide rail 103, the inner wall of the first electric slide rail 103 is rotatably connected to a sliding ring 104, the inner wall of the sliding ring 104 is provided with a second groove 105, the inner wall of the second groove 105 is fixedly connected to a second electric slide rail 106, and the inner wall of the second electric slide rail 106 is rotatably connected to a plurality of first slide plates 107;

[0027] One end side wall of multiple first slides 107 is fixedly connected to the first motor 108, the output end of the first motor 108 is fixedly connected to the first electric telescopic rod 109, the telescopic end of the first electric telescopic rod 109 is fixedly connected to the first U-plate 1010, the inner walls at both ends of the first U-plate 1010 are fixedly connected to the second electric telescopic rod 1011, the telescopic ends of the second electric telescopic rod 1011 are fixedly connected to the side plate 1012, and the bottom end side walls of the side plate 1012 are rotatably connected to the limiting wheels 1013.

[0028] Specifically, when it is necessary to cover multiple twisted cables with the same sheath layer, the limiting plate 124 and the limiting wheel 1013 can be used to limit the outside of the multiple twisted cables at both ends of the mold 6 to ensure that the multiple twisted cables are located in the center position of the mold 6, and the angle and position of the limiting wheel 1013 can be continuously adjusted during the continuous movement of the multiple twisted cables to ensure that the limiting wheel 1013 can always contact the outer wall of the corresponding cable, so that the limiting wheel 1013 can always limit the outer wall of the corresponding cable during the movement of the multiple twisted cables, thereby avoiding the unstable position of the multiple twisted cables resulting in uneven thickness of the extruded sheath, affecting product quality.

[0029] In the embodiment, the conveying assembly 11 includes two groups of third grooves 111 formed on the top side wall of the base plate 1, each group of third grooves 111 has two third grooves, the inner walls of the third grooves 111 are fixedly connected to third electric slide rails 112, the top side walls of the third electric slide rails 112 are slidably connected to third slide plates 113, the top side walls of each group of third slide plates 113 are fixedly connected to support rods 114, one end of each group of support rods 114 is fixedly connected to the same conveying ring 115, the inner wall of the conveying ring 115 is formed with a fourth groove 116, and the inner wall of the fourth groove 116 is fixedly connected to a fourth electric slide rail 117;

[0030] A plurality of fourth slides 118 are slidably connected to the inner wall of the fourth electric slide rail 117. A second motor 119 is fixedly connected to the side wall of one end of each fourth slide 118. The output end of each second motor 119 is fixedly connected to a third electric telescopic rod 1110. The telescopic end of each third electric telescopic rod 1110 is fixedly connected to a second U-plate 1111. The inner walls of both ends of the second U-plate 1111 are fixedly connected to fourth electric telescopic rods 1112. The telescopic end of each fourth electric telescopic rod 1112 is fixedly connected to a fixed plate 1113.

[0031] The traction assembly 12 includes two connecting rods 121 symmetrically fixedly connected to the top side wall of the base plate 1. One end of the connecting rods 121 is fixedly connected to a connecting plate 122. One end side wall of the connecting plate 122 is fixedly connected to a fifth electric telescopic rod 123. The telescopic ends of the fifth electric telescopic rod 123 are fixedly connected to a limit plate 124. One end side wall of the mold 6 is fixedly connected to a cooling ring 125.

[0032] Two groups of fifth grooves 126 are formed on the top side wall of the bottom plate 1, each group of fifth grooves 126 having two fifth grooves. The inner walls of the fifth grooves 126 are fixedly connected to fifth electric slide rails 127, and the top side walls of the fifth electric slide rails 127 are slidably connected to fifth slide plates 128.

[0033] The top side wall of the fifth slide plate 128 is fixedly connected to a side rod 129, one end of the side rod 129 is fixedly connected to a fixed block 1210, one end side wall of the fixed block 1210 is fixedly connected to a sixth electric telescopic rod 1211, and the telescopic ends of the sixth electric telescopic rod 1211 are fixedly connected to a traction plate 1212.

[0034] Specifically, the fixing plate 1113 and the pulling plate 1212 can be used to continuously pull and transport multiple twisted cables, ensuring that the outer wall of the cable can be continuously covered with a sheath layer, which greatly improves the reliability and production effect of the device when extruding the cable.

[0035] The operating principle of the present invention is now described as follows:

[0036] In the present invention, when it is necessary to cover multiple twisted cables with the same sheath layer, the staff first pours the plastic granules into the feed hopper 5 to allow the plastic granules to enter the heating shell 2, and then controls the heating shell 2 and the conveying motor 4 to start, so that the heating shell 2 heats the plastic granules to melt the plastic granules, and at the same time uses the conveying motor 4 to drive the screw 3 to rotate, and the screw 3 rotates in the heating shell 2 to plasticize, mix and push the molten plastic, so that the molten plastic granules are conveyed to the internal cavity of the mold 6 through the output pipe 7. At the same time, the staff sequentially passes one end of the multiple twisted cables through the two conveying rings 115, the limit ring 101 and the mold 6, so that one end of the multiple twisted cables is located on one side of the limit plate 124, and then controls the fifth electric telescopic rod 123 to start, with The movable limit plate 124 moves, and the limit plate 124 is used to simply fix the outer walls of the multiple twisted cables. Then, the second electric slide rail 106 is controlled to start, and the number of twisted cables covered as needed is driven to start the corresponding number of first slides 107, so that one end of the first electric telescopic rod 109 is located on one side of the corresponding cable. Then, the corresponding first motor 108 is controlled to start, driving the first electric telescopic rod 109 to rotate, so that the inclination angle of the first U plate 1010 is the same as the inclination angle of the corresponding cable. Then, the first electric telescopic rod 109 is controlled to start, so that the internal opening of the first U plate 1010 is located on both sides of the outer wall of the corresponding cable. Then, the second electric telescopic rod 1011 is controlled to start, driving the side plate 1012 to move, so that the limiting wheel 1013 and the The outer walls of the corresponding cables are in contact, and the outer walls of the corresponding cables are limited by the limiting wheel 1013. At this time, the multiple twisted cables are located in the central part of the mold 6. Then, the fourth electric slide rail 117 in the conveying ring 115 above the third groove 111 close to the side of the mold 6 is controlled to start, and the corresponding fourth slide plate 118 is driven to move according to the number of the multiple twisted cables, so that one end of the third electric telescopic rod 1110 is located on one side of the corresponding cable. Then, the second motor 119 is controlled to start, driving the third electric telescopic rod 1110 to rotate, so that the inclination angle of the second U-plate 1111 is the same as the inclination angle of the corresponding cable. Then, the third electric telescopic rod 1110 is controlled to start, driving the second U-plate 1111 to move, so that the internal opening of the second U-plate 1111 is located On both sides of the outer wall of the corresponding cable, the fourth electric telescopic rod 1112 is controlled to start, and the outer wall of the corresponding cable is fixed by the fixing plate 1113. Then, the corresponding fourth electric slide rail 117 is controlled to start, driving the fourth slide plate 118 to move, and the multiple twisted cables are continuously transported to the inside of the mold 6. At the same time, the sixth electric telescopic rod 1211 above the fifth groove 126 on the other side of the mold 6 is started, driving the traction plate 1212 to move, and the traction plate 1212 is used to fix the outer wall of the multiple twisted cables. Then, the corresponding fifth electric slide rail 127 is controlled to start, driving the fifth slide plate 128 to move, and the cables that have passed through the mold 6 are continuously removed. At the same time, the moving speed of the fifth slide plate 128 is the same as that of the fourth slide plate 118.To ensure that the cable can be stably pulled and transported, after the fifth slide 128 and the fourth slide 118 move to the end, the traction plate 1212 and the fixing plate 1113 in the other group are controlled to start according to the above steps to fix the cable, and then the cable is continued to be transported and pulled according to the above steps. At the same time, the fourth slide 118 and the fifth slide 128 that were initially moved move in the direction of the original movement. After the fourth slide 118 and the fifth slide 128 of the other group move to the end, the fourth slide 118 and the fifth slide 128 that were initially moved are used to continue to transport and pull the cable to ensure that the cable can be stably pulled and transported. The outer wall of the cable is intermittently covered with a sheath layer. When the limiting wheel 1013 is used to continuously limit the multiple twisted cables, the inclination angle of the multiple twisted cables will continue to change as the cables move. At this time, the second electric slide 106 and the first motor 108 are controlled to be continuously started so that the limiting wheel 1013 can always be in contact with the corresponding outer wall of the cable, ensuring that the multiple twisted cables are stably limited and the multiple twisted cables are located in the center of the mold 6. When the multiple twisted cables are continuously moved from the mold 6, the solenoid valve 9 is controlled to open so that the molten plastic particles in the internal cavity of the mold 6 are evenly distributed. The outer portion of the plurality of twisted cables is covered with a sheath layer, and after being removed from the mold 6, the sheath layer covered on the surface of the plurality of twisted cables is quickly cooled by the cooling ring 125, so that the sheath layer can be quickly formed, thereby achieving the covering of the outer sheath layer of the plurality of twisted cables. When it is necessary to cover the plurality of twisted cables with the same sheath layer, the limiting plate 124 and the limiting wheel 1013 are used to limit the outer portion of the plurality of twisted cables at both ends of the mold 6, ensuring that the plurality of twisted cables are located at the center of the mold 6, and being able to The angle and position of the limiting wheel 1013 are continuously adjusted to ensure that the limiting wheel 1013 is always in contact with the outer wall of the corresponding cable. This allows the limiting wheel 1013 to always limit the outer wall of the corresponding cable during the movement of multiple twisted cables, thus preventing the unstable position of the multiple twisted cables from causing uneven thickness of the extruded sheath, which affects product quality. At the same time, the fixed plate 1113 and the pulling plate 1212 can be used to continuously pull and convey the multiple twisted cables, ensuring that the outer wall of the cable can be continuously covered with the sheath layer, greatly improving the reliability of the device when extruding cables and the production effect.

[0037] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An extruder for wires and cables, comprising a bottom plate, characterized in that: The top side wall of the bottom plate is fixedly connected to a heating shell, and the inner walls at both ends of the heating shell are rotatably connected to the same screw, and one end side wall of the heating shell is fixedly connected to a conveying motor, and the output end of the conveying motor passes through the side wall of the heating shell and is fixedly connected to one end of the screw, the top side wall of the heating shell is provided with an opening, and a feed hopper is fixedly connected to the corresponding opening, the top side wall of the bottom plate is fixedly connected to the mold, and one end side wall of the heating shell is provided with a through hole, and an output pipe is fixedly connected to the corresponding through hole, one end of the output pipe passes through the side wall of the mold and extends to the internal cavity of the mold, the inner wall of the mold is provided with a plurality of discharge holes, and solenoid valves are provided inside the corresponding discharge holes, the top side wall of the bottom plate is fixedly connected to a limiting assembly, the top side wall of the bottom plate is provided with a conveying assembly, and the top side wall of the bottom plate is provided with a traction assembly; The limiting assembly includes a limiting ring fixedly connected to the top side wall of the bottom plate, an inner wall of the limiting ring is provided with a first groove, an inner wall of the first groove is fixedly connected to a first electric slide rail, an inner wall of the first electric slide rail is rotatably connected to a sliding ring, an inner wall of the sliding ring is provided with a second groove, an inner wall of the second groove is fixedly connected to a second electric slide rail, and an inner wall of the second electric slide rail is rotatably connected to a plurality of first slide plates; A first motor is fixedly connected to the side wall of one end of each of the first slides; an output end of the first motor is fixedly connected to a first electric telescopic rod; a telescopic end of the first electric telescopic rod is fixedly connected to a first U-plate; inner walls at both ends of the first U-plate are fixedly connected to second electric telescopic rods; the telescopic ends of the second electric telescopic rods are fixedly connected to side plates; and the bottom side walls of the side plates are rotatably connected to limit wheels; The conveying assembly includes two groups of third grooves formed on the top side wall of the bottom plate, each group of the third grooves having two third grooves, the inner walls of the third grooves being fixedly connected to third electric slide rails, the top side walls of the third electric slide rails being slidably connected to third slide plates, the top side walls of each group of the third slide plates being fixedly connected to a support rod, one end of each group of the support rods being fixedly connected to the same conveying ring, the inner wall of the conveying ring being formed with a fourth groove, the inner wall of the fourth groove being fixedly connected to a fourth electric slide rail; The traction assembly includes two connecting rods symmetrically fixedly connected to the side walls of the top end of the bottom plate, one end of each connecting rod is fixedly connected to a connecting plate, one end side wall of each connecting plate is fixedly connected to a fifth electric telescopic rod, the telescopic ends of each fifth electric telescopic rod are fixedly connected to a limit plate, and one end side wall of the mold is fixedly connected to a cooling ring; Two groups of fifth grooves are provided on the top side walls of the bottom plate, each group of the fifth grooves has two fifth grooves, the inner walls of the fifth grooves are fixedly connected to the fifth electric slide rails, and the top side walls of the fifth electric slide rails are slidably connected to the fifth slide plate.

2. The wire and cable extruder according to claim 1, characterized in that: A plurality of fourth slides are slidably connected to the inner wall of the fourth electric slide rail, and a second motor is fixedly connected to the side wall of one end of the fourth slide, and an output end of the second motor is fixedly connected to a third electric telescopic rod, and the telescopic end of the third electric telescopic rod is fixedly connected to a second U-plate, and the inner walls at both ends of the second U-plate are fixedly connected to the fourth electric telescopic rod, and the telescopic end of the fourth electric telescopic rod is fixedly connected to a fixed plate.

3. The wire and cable extruder according to claim 1, characterized in that: The top side wall of the fifth slide is fixedly connected to a side rod, one end of the side rod is fixedly connected to a fixed block, one end side wall of the fixed block is fixedly connected to a sixth electric telescopic rod, and the telescopic ends of the sixth electric telescopic rod are both fixedly connected to a traction plate.

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