Large-diameter, high-specific-gravity material packaging bottle capping device

Abstract

The utility model relates to a kind of cap screwing devices of large-diameter large specific gravity material packaging bottle;The device includes low place subassembly and high place subassembly;Low place subassembly includes the hugging mechanism of left and right symmetry arrangement;The hugging mechanism includes hugging cylinder and hugging clamping block;The output end of hugging cylinder is inwardly arranged, and installation clamping block;The inward face of clamping block is equipped with arc close surface;High place subassembly includes the cap screwing mechanism of symmetrically setting in the pressing cap mechanism left and right sides;The cap screwing mechanism includes push cylinder, cap screwing motor and the two cap screwing wheels of front and back arrangement;The output end of push cylinder is inwardly arranged, and installation cap screwing motor;Cap screwing motor is vertically downwardly arranged, with two cap screwing wheels driving connection, and drives cap screwing wheel same direction rotation.The utility model no matter how big-diameter packaging bottle bottle body, arc close surface can be established with packaging bottle bottle body Effective connection;No matter how big-diameter packaging bottle cap, transversely moved cap screwing wheel can be established with packaging bottle cap side surface Effective connection.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging for high-density materials, and in particular to a screw capping device for a large-diameter, high-density material packaging bottle. Background Technology

[0002] High-density materials refer to particulate materials with a very high specific gravity. A common example of a high-density material is fine-grained diamond. High-density materials are generally packaged in large-diameter bottles. To reduce the manual labor intensity of tightening bottle caps, ensure the quality of cap tightening, and improve production efficiency, a patented diamond bottle cap tightening device (authorization number CN114852936B) has been proposed. After positioning and clamping the bottle, this device lowers the cylindrical claws to a suitable height via a lifting mechanism. Then, a sliding rod drives the cylindrical claws to slide inward synchronously along an elongated sliding hole. Finally, a motor in the gripper assembly drives each cylindrical claw to rotate, thus tightening the bottle cap. However, the cylindrical claws are arranged circumferentially, making this device suitable only for tightening caps of a fixed diameter. Once a bottle with a different diameter is used, this bottle tightening device becomes unsuitable. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a screw capping device for large-diameter, high-density material packaging bottles.

[0004] The technical solution of this utility model is as follows: A capping device for a large-diameter, high-density material packaging bottle includes a lower component and a higher component arranged vertically; the lower component includes a clamping mechanism symmetrically arranged on the left and right; the clamping mechanism includes a clamping cylinder and a clamping block for clamping the bottle body; the output end of the clamping cylinder is arranged inward and the clamping block is installed; the two clamping cylinders are activated synchronously, driving the clamping block to move laterally, performing the action of clamping and releasing the bottle body; the inner surface of the clamping block has an arc-shaped contact surface; regardless of the size of the bottle body, the arc-shaped contact surface can establish an effective connection with the bottle body; the higher component includes two symmetrically arranged components on the left and right sides of the capping mechanism. The capping mechanism includes a push cylinder, a capping motor, and two capping wheels positioned at the front and rear. The output end of the push cylinder faces inward and houses the capping motor. The capping motor is vertically downward and connected to the two capping wheels, driving them to rotate in the same direction. The two push cylinders start synchronously, driving the capping motor to move the capping wheels laterally until the capping wheels are in contact with the side of the bottle cap or disengage from the bottle cap. When the capping wheel is in contact with the side of the bottle cap, the capping motor outputs torque, driving the capping wheels to rotate and perform the capping action. Regardless of the bottle cap's diameter, the laterally moving capping wheels can establish an effective connection with the side of the bottle cap.

[0005] Preferably, the lower component also includes a mounting base plate; the clamping mechanism is mounted on the mounting base plate, so that the clamping mechanisms arranged symmetrically on the left and right are connected as one unit, and the packaging bottle is received to ensure the stability of the capping process.

[0006] Furthermore, the mounting base plate has supporting pads at its four corners; these supporting pads utilize their own elasticity to improve the stability of the mounting base plate.

[0007] Furthermore, the lower component also includes a positioning mechanism located on the rear side between the two clamping mechanisms; the positioning mechanism includes a positioning plate and an adjusting screw; the head end of the positioning plate faces forward and has an isosceles triangular notch, similar to a triangle iron, for aligning the left and right sides of the packaging bottle; the tail end of the positioning plate faces rearward and has a longitudinal elongated hole; the adjusting screw passes through the longitudinal elongated hole and connects to the mounting base plate; by adjusting the position of the adjusting screw in the longitudinal elongated hole, the position of the isosceles triangular notch is changed to adapt to the left and right alignment requirements of bottles with different diameters.

[0008] Furthermore, the positioning mechanism also includes a lifting strip; the lifting strip is located below the tail end of the positioning plate and is connected to the mounting base plate; the adjusting screw is threadedly connected to the lifting strip; the lifting strip can raise the height of the positioning plate so that the isosceles triangular notch can engage with the middle of the bottle body for more effective left-right alignment.

[0009] Furthermore, the positioning mechanism also includes hexagon socket screws; the hexagon socket screws are symmetrically arranged on the left and right sides of the adjusting screw, and are threaded through the lifting strip and the mounting base plate, so that the lifting strip and the mounting base plate are integrated.

[0010] Furthermore, the height adjustment component also includes a height adjustment mechanism; this mechanism includes two guide columns, a crossbeam, a lead screw, a handwheel, a lead screw nut, and a height adjustment plate; the guide columns are symmetrically arranged on both sides of the positioning mechanism, with their lower ends connected to the mounting base plate; both ends of the crossbeam are connected to the upper ends of the guide columns; the capping mechanism and the lead screw nut are mounted on the height adjustment plate; the height adjustment plate and the guide columns slide vertically together; the upper end of the lead screw is rotatably connected to the midpoint of the crossbeam and fixed to the handwheel; the lead screw and the lead screw nut are threaded together; rotating the handwheel drives the lead screw to rotate; the rotating lead screw acts on the lead screw nut to vertically raise and lower the height adjustment plate; the guide columns provide guidance for the vertical raising and lowering of the height adjustment plate; the vertical raising and lowering of the height adjustment plate allows the capping mechanism to adapt to the capping operation of packaging bottles of different heights.

[0011] Furthermore, the height adjustment mechanism also includes a vertical linear bearing; the vertical linear bearing is mounted on the height adjustment plate and slides in cooperation with the guide column to provide guidance for the height adjustment of the height adjustment plate.

[0012] Furthermore, the height adjustment plate is symmetrically provided with side plates on both the left and right sides; the push cylinder is installed on the side plate; the cap tightening mechanism also includes a sliding block; the sliding block is installed on the output end of the push cylinder and slides laterally with the height adjustment plate; the height adjustment plate is also provided with two transverse guide shafts; the transverse guide shafts are embedded in the side plate and slide with the sliding block; the side plate realizes the installation of the transverse guide shafts; the sliding engagement between the transverse guide shafts and the sliding block provides guidance for the transverse movement of the cap tightening wheel.

[0013] Furthermore, the height adjustment mechanism also includes a bushing and a fastener; the bushing is fitted over the guide light column, above and below the height adjustment plate; the fastener passes through the side of the bushing and abuts against the side of the guide light column; the bushing limits the adjustment limit position of the height adjustment plate.

[0014] Furthermore, the capping mechanism also includes two gear rods and a drive gear; the capping motor is mounted on top of the sliding block; the output end of the capping motor is coaxially fixed to the drive gear; the gear rods vertically penetrate the sliding block; the upper end of the gear rods is coaxially fixed to the driven gear; the drive gear meshes with the driven gear simultaneously; the lower end of the gear rods is coaxially fixed to the capping wheel; the capping motor outputs torque, which drives the two gear rods to rotate in the same direction through the drive gear and the driven gear, thereby causing the capping wheel to tighten the bottle cap.

[0015] Furthermore, the sliding block extends downwards to form a protective sleeve that matches the middle of the gear rod; the protective sleeve is fitted onto the outside of the middle of the gear rod to protect it; the height adjustment plate has a transverse elongated hole B that matches the protective sleeve; the protective sleeve slides laterally with the transverse elongated hole B to guide the lateral movement of the capping wheel; the capping mechanism also includes a limiting nut; the limiting nut is threaded to the middle of the gear rod and abuts against the bottom end of the protective sleeve to achieve vertical limiting of the gear rod.

[0016] Furthermore, the capping wheel is fitted with a rubber sleeve that can deform elastically, ensuring that the capping wheel acts stably on the bottle cap.

[0017] Furthermore, the high-mounted component also includes a capping mechanism disposed between the two capping mechanisms; the capping mechanism includes a gantry frame, a vertical cylinder, and a pressure plate; the gantry frame is mounted on a height adjustment plate; the vertical cylinder is mounted on the top of the gantry frame; the output end of the vertical cylinder passes through the height adjustment plate and is rotatably connected to the pressure plate; the output of the vertical cylinder drives the pressure plate to press down, acting on the center of the bottle cap, and assisting in the cap tightening operation.

[0018] Furthermore, the capping mechanism also includes a floating joint and a connecting rod; the upper end of the floating joint is connected to the output end of the vertical cylinder; the lower end of the floating joint is connected to the upper end of the connecting rod; the lower end of the connecting rod is connected to the pressure plate; the floating joint enables the pressure plate to rotate.

[0019] The beneficial effects of this utility model are as follows: The screw capping device for large-diameter, high-specific-gravity material packaging bottles of this utility model has the following advantages: (1) This utility model is provided with a laterally moving screw-on wheel and a clamping block; regardless of the size of the bottle body, the arc-shaped contact surface can establish an effective connection with the bottle body; regardless of the size of the bottle cap, the laterally moving screw-on wheel can establish an effective connection with the side of the bottle cap. (2) The isosceles triangular notch of this utility model is similar to a triangle iron and is used for the left and right centering of the bottle body; by adjusting the position of the adjusting screw in the longitudinal long hole, the position of the isosceles triangular notch is changed to adapt to the left and right centering requirements of bottles with different diameters. Attached Figure Description

[0020] Figure 1 This is a front view of the screw capping device for large-diameter, high-density material packaging bottles of this utility model; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 2 BB section view; Figure 4 yes Figure 2 CC section view; Figure 5 yes Figure 3 DD sectional view; Figure 6 yes Figure 5 EE sectional view; Figure 7 This utility model relates to a three-dimensional capping device for large-diameter, high-density material packaging bottles. Figure 1 ; Figure 8 This utility model relates to a three-dimensional capping device for large-diameter, high-density material packaging bottles. Figure 2 ; In the diagram: 111. Clamping cylinder, 112. Clamping clamp block, 1121. Arc-shaped contact surface, 113. Clamping cylinder seat plate, 1131. Horizontal elongated hole A, 114. Screw A, 115. Screw B, 12. Mounting base plate, 121. Support pad, 131. Positioning plate, 1311. Isosceles triangle notch, 1312. Longitudinal elongated hole, 132. Adjusting screw, 133. Lifting bar, 134. Socket head cap screw, 211. Pushing cylinder, 212. Cap tightening motor, 213. Cap tightening wheel, 2131. Rubber sleeve, 214. Sliding block, 2 141. Protective sleeve; 215. Gear rod; 2151. Driven gear; 216. Driving gear; 217. Limit nut; 221. Guide column; 222. Crossbeam; 223. Lead screw; 224. Handwheel; 225. Lead screw nut; 226. Height adjustment plate; 2261. Side plate; 2262. Lateral guide shaft; 2263. Lateral elongated hole B; 227. Vertical linear bearing; 228. Bushing; 229. Fastening nail; 231. Portal frame; 232. Vertical cylinder; 233. Pressure plate; 234. Floating joint; 235. Connecting rod. Detailed Implementation

[0021] Example 1: See Figure 1-8 A capping device for a large-diameter, high-density material packaging bottle includes a lower component and a higher component arranged vertically. The lower component includes a clamping mechanism symmetrically arranged on the left and right sides. The clamping mechanism includes a clamping cylinder 111 and a clamping block 112 for clamping the bottle body. The output end of the clamping cylinder 111 is arranged inward and the clamping block is installed. The two clamping cylinders 111 are activated synchronously, driving the clamping block to move laterally, performing the action of clamping and releasing the bottle body. The inner surface of the clamping block is provided with an arc-shaped contact surface 1121. Regardless of the bottle body diameter, the arc-shaped contact surface 1121 can establish an effective connection with the bottle body. The higher component includes a capping mechanism symmetrically arranged on the left and right sides of the capping mechanism. The capping mechanism includes a pushing cylinder 21. 1. A capping motor 212 and two capping rollers 213 arranged at the front and rear; the output end of the push cylinder 211 is set inward, and the capping motor 212 is installed there; the capping motor 212 is set vertically downward and is connected to the two capping rollers 213 to drive them to rotate in the same direction; the two push cylinders 211 start synchronously, driving the capping motor 212 to move the capping rollers 213 laterally until the capping rollers 213 are in contact with the side of the bottle cap or the capping rollers 213 are out of contact with the bottle cap; when the top cap roller is in contact with the side of the bottle cap, the capping motor 212 outputs torque to drive the capping rollers 213 to rotate and perform the capping action; regardless of the size of the bottle cap, the laterally moving capping rollers 213 can establish an effective connection with the side of the bottle cap.

[0022] Compared with the prior art, this utility model is equipped with a laterally moving capping wheel 213 and a clamping block; regardless of the bottle body of the packaging bottle, the arc-shaped contact surface 1121 can establish an effective connection with the bottle body; regardless of the bottle cap of the packaging bottle, the laterally moving capping wheel 213 can establish an effective connection with the side of the bottle cap.

[0023] The lower component also includes a mounting base plate 12; the clamping mechanism is mounted on the mounting base plate 12, so that the clamping mechanisms arranged symmetrically on the left and right are connected as one unit, and the packaging bottle is received to ensure the stability of the capping process.

[0024] The mounting base plate 12 has support pads 121 at its four corners; the support pads 121 use their own elasticity to improve the support stability of the mounting base plate 12.

[0025] The lower component also includes a positioning mechanism located on the rear side between the two clamping mechanisms; the positioning mechanism includes a positioning plate 131 and an adjusting screw 132; the head end of the positioning plate 131 faces forward and has an isosceles triangular notch 1311, similar to a triangle iron, for the left and right centering of the packaging bottle body; the tail end of the positioning plate 131 faces backward and has a longitudinal elongated hole 1312; the adjusting screw 132 passes through the longitudinal elongated hole 1312 and connects to the mounting base plate 12; by adjusting the position of the adjusting screw 132 in the longitudinal elongated hole 1312, the position of the isosceles triangular notch 1311 is changed to adapt to the left and right centering requirements of bottles with different diameters.

[0026] The positioning mechanism also includes a lifting strip 133; the lifting strip 133 is located below the tail end of the positioning plate 131 and is connected to the mounting base plate 12; the adjusting screw 132 is threadedly connected to the lifting strip 133; the lifting strip 133 can raise the height of the positioning plate 131 so that the isosceles triangular notch 1311 can engage with the middle of the bottle body for more effective left-right centering.

[0027] The positioning mechanism also includes hexagon socket screws 134; two hexagon socket screws 134 are symmetrically arranged on the left and right of the adjusting screw 132, and are threaded through the lifting strip 133 and connected to the mounting base plate 12, so that the lifting strip 133 and the mounting base plate are integrated.

[0028] The high-level component also includes a height adjustment mechanism; this mechanism includes two guide columns 221, a crossbeam 222, a lead screw 223, a handwheel 224, a lead screw nut 225, and a height adjustment plate 226; the guide columns 221 are symmetrically arranged on both sides of the positioning mechanism, with their lower ends connected to the mounting base plate 12; both ends of the crossbeam 222 are connected to the upper ends of the guide columns 221; the capping mechanism and the lead screw nut 225 are mounted on the height adjustment plate 226; the height adjustment plate 226 and the guide columns 221 slide vertically together. The upper end of the lead screw 223 is rotatably connected to the midpoint of the crossbeam 222 and fixed to the handwheel 224; the lead screw 223 and the lead screw nut 225 are threadedly engaged; rotating the handwheel 224 drives the lead screw 223 to rotate; the rotating lead screw 223 acts on the lead screw nut 225 to make the height adjustment plate 226 rise and fall vertically; the guide column 221 provides guidance for the vertical rise and fall of the height adjustment plate 226; the vertical rise and fall of the height adjustment plate 226 enables the capping mechanism to adapt to the capping operation of packaging bottles of different heights.

[0029] The height adjustment mechanism also includes a vertical linear bearing 227; the vertical linear bearing 227 is mounted on the height adjustment plate 226 and slides in cooperation with the guide light column 221 to provide guidance for the height adjustment of the height adjustment plate 226.

[0030] The height adjustment plate 226 has symmetrical side plates 2261 on both the left and right sides; the push cylinder 211 is installed on the side plate 2261; the cap tightening mechanism also includes a sliding block 214; the sliding block 214 is installed on the output end of the push cylinder 211 and slides laterally with the height adjustment plate 226; the height adjustment plate 226 also has two transverse guide shafts 2262; the transverse guide shafts 2262 are embedded in the side plate 2261 and slide with the sliding block 214; the side plate 2261 realizes the installation of the transverse guide shafts 2262; the sliding engagement of the transverse guide shafts 2262 and the sliding block 214 provides guidance for the transverse movement of the cap tightening wheel 213.

[0031] The height adjustment mechanism also includes a bushing 228 and a fastener 229; the bushing 228 is fitted outside the guide light column 221, and the height adjustment plate 226 is positioned above and below; the fastener 229 passes through the side of the bushing 228 and abuts against the side of the guide light column 221; the bushing 228 limits the adjustment limit position of the height adjustment plate.

[0032] The clamping mechanism also includes a clamping cylinder seat plate 113, screw A 114, and screw B 115. Screw A 114 vertically passes through the clamping cylinder 111 and is threadedly connected to the clamping cylinder seat plate 113, thus connecting the clamping cylinder 111 and the clamping cylinder seat plate 113. The clamping cylinder seat plate 113 is provided with symmetrical transverse elongated holes A 1131. Screw B 115 passes through the transverse elongated holes A 1131 and is threadedly connected to the mounting base plate 12, thus connecting the clamping cylinder seat plate 113 and the mounting base plate 12. By changing the position of screw B 115 in the transverse elongated holes A 1131, the transverse position of the clamping cylinder 111 is changed, thus expanding the extension and retraction stroke that the clamping cylinder 111 can achieve. In this way, the clamping cylinder 111 can be adapted to clamp more bottles of different thicknesses. The symmetrically arranged transverse elongated holes A 1131 can increase the connection stability between the clamping cylinder seat plate 113 and the mounting base plate 12.

[0033] The capping mechanism also includes two gear rods 215 and a drive gear 216; the capping motor 212 is mounted on the top of the sliding block 214; the output end of the capping motor 212 is coaxially fixed to the drive gear 216; the gear rod 215 vertically passes through the sliding block 214; the upper end of the gear rod 215 is coaxially fixed to the driven gear 2151; the drive gear 216 meshes with the driven gear 2151 at the same time; the lower end of the gear rod 215 is coaxially fixed to the capping wheel 213; the capping motor 212 outputs torque, which drives the two gear rods 215 to rotate in the same direction through the drive gear 216 and the driven gear 2151, thereby causing the capping wheel 213 to tighten the bottle cap.

[0034] The sliding block 214 extends downward to form a protective sleeve 2141 that matches the middle part of the gear rod 215. The protective sleeve 2141 is fitted onto the outer side of the middle part of the gear rod 215 to protect the middle part of the gear rod 215. The height adjustment plate 226 is provided with a transverse elongated hole 2263 that matches the protective sleeve 2141. The protective sleeve 2141 and the transverse elongated hole 2263 slide laterally to provide guidance for the lateral movement of the capping wheel 213. The capping mechanism also includes a limiting nut 217. The limiting nut 217 is threaded to the middle part of the gear rod 215 and abuts against the bottom end of the protective sleeve 2141 to achieve vertical limiting of the gear rod 215.

[0035] The capping wheel 213 is fitted with a rubber sleeve 2131, which can be elastically deformed to ensure that the capping wheel 213 acts stably on the bottle cap.

[0036] The working principle of this embodiment is as follows: The clamping cylinder 111 and the clamping block 112 are used to clamp the bottle body; the two clamping cylinders 111 are started synchronously, driving the clamping block to move laterally, thus clamping and releasing the bottle body; regardless of the bottle body diameter, the arc-shaped contact surface 1121 can establish an effective connection with the bottle body; the two pushing cylinders 211 are started synchronously, driving the capping motor 212 to move the capping wheel 213 laterally until the capping wheel 213 is in contact with the side of the cap or the capping wheel 213 is out of contact with the cap; when the capping wheel is in contact with the side of the cap, the capping motor 212 outputs torque, driving the capping wheel 213 to rotate, thus performing the capping action; regardless of the bottle cap diameter, the laterally moving capping wheel 213 can establish an effective connection with the side of the bottle cap. The isosceles triangular notch 1311, similar to a triangle iron, is used for left-right alignment of the packaging bottle body. The position of the isosceles triangular notch 1311 is changed by adjusting the position of the adjusting screw 132 in the longitudinal hole 1312 to accommodate the left-right alignment requirements of bottles with different diameters. The lifting strip 133 raises the height of the positioning plate 131, allowing the isosceles triangular notch 1311 to engage with the middle of the bottle body for more effective left-right alignment. The protective sleeve 2141 is fitted onto the outer side of the middle of the gear rod 215 to protect the middle of the gear rod 215; the rubber sleeve 2131 can deform elastically to ensure that the capping wheel 213 acts stably on the bottle cap. Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the high-mounted component also includes a capping mechanism disposed between the two capping mechanisms. The capping mechanism includes a gantry frame 231, a vertical cylinder 232, and a pressure plate 233. The gantry frame 231 is mounted on the height adjustment plate 226. The vertical cylinder 232 is mounted on the top of the gantry frame 231. The output end of the vertical cylinder 232 passes through the height adjustment plate 226 and is rotatably connected to the pressure plate 233. The output of the vertical cylinder 232 drives the pressure plate 233 to press down, acting on the center of the bottle cap to assist in the cap tightening operation.

[0037] The capping mechanism also includes a floating joint 234 and a connecting rod 235; the upper end of the floating joint 234 is connected to the output end of the vertical cylinder 232; the lower end of the floating joint 234 is connected to the upper end of the connecting rod 235; the lower end of the connecting rod 235 is connected to the pressure plate 233; the floating joint 234 can realize the rotational connection of the pressure plate 233.

Claims

1. A screw-on capping device for a large-diameter, high-specific-gravity material packaging bottle, characterized in that, The device includes a lower component and a higher component arranged vertically. The lower component includes a clamping mechanism symmetrically arranged on the left and right sides. The clamping mechanism includes a clamping cylinder and a clamping block. The output end of the clamping cylinder is positioned inward and the clamping block is installed thereon. The inner surface of the clamping block has an arc-shaped contact surface. The higher component includes a cap-tightening mechanism symmetrically arranged on the left and right sides of the cap-pressing mechanism. The cap-tightening mechanism includes a push cylinder, a cap-tightening motor, and two cap-tightening wheels arranged in front and behind. The output end of the push cylinder is positioned inward and the cap-tightening motor is installed thereon. The cap-tightening motor is vertically downward and is connected to the two cap-tightening wheels for driving them to rotate in the same direction.

2. The capping device for large-diameter, high-density material packaging bottles according to claim 1, characterized in that: The lower components also include a mounting base plate; the clamping mechanism is mounted on the mounting base plate.

3. The capping device for large-diameter, high-density material packaging bottles according to claim 2, characterized in that: The lower component also includes a positioning mechanism located on the rear side between the two clamping mechanisms; the positioning mechanism includes a positioning plate and an adjusting screw; the head end of the positioning plate faces forward and has an isosceles triangular notch; the tail end of the positioning plate faces rearward and has a longitudinal elongated hole; the adjusting screw passes through the longitudinal elongated hole and connects to the mounting base plate.

4. The capping device for large-diameter, high-specific-gravity material packaging bottles according to claim 3, characterized in that: The positioning mechanism also includes a lifting bar; the lifting bar is located below the tail end of the positioning plate and is connected to the mounting base plate; the adjusting screw is threadedly connected to the lifting bar.

5. The capping device for large-diameter, high-density material packaging bottles according to claim 3, characterized in that: The height adjustment mechanism also includes two guide columns, a crossbeam, a lead screw, a handwheel, a lead screw nut, and a height adjustment plate. The guide columns are symmetrically arranged on both sides of the positioning mechanism, with their lower ends connected to the mounting base plate. Both ends of the crossbeam are connected to the upper ends of the guide columns. The capping mechanism and the lead screw nut are mounted on the height adjustment plate. The height adjustment plate and the guide columns slide vertically together. The upper end of the lead screw is rotatably connected to the midpoint of the crossbeam and fixed to the handwheel. The lead screw and the lead screw nut are threaded together.

6. The capping device for large-diameter, high-density material packaging bottles according to claim 5, characterized in that: The height adjustment plate has symmetrical side plates on both the left and right sides; the push cylinder is installed on the side plate; the cap tightening mechanism also includes a sliding block; the sliding block is installed at the output end of the push cylinder and slides laterally with the height adjustment plate; the height adjustment plate also has two transverse guide shafts; the transverse guide shafts are embedded in the side plate and slide with the sliding block.

7. The capping device for large-diameter, high-density material packaging bottles according to claim 6, characterized in that: The cap-tightening mechanism also includes two gear rods and a drive gear; the cap-tightening motor is mounted on the top of the sliding block; the output end of the cap-tightening motor is coaxially fixed to the drive gear; the gear rods vertically pass through the sliding block; the upper end of the gear rods is coaxially fixed to the driven gear; the drive gear meshes with the driven gear at the same time; the lower end of the gear rods is coaxially fixed to the cap-tightening wheel.

8. The capping device for large-diameter, high-specific-gravity material packaging bottles according to claim 7, characterized in that: The sliding block extends downward to form a protective sleeve that matches the middle of the gear rod; the protective sleeve is fitted onto the outer side of the middle of the gear rod; the height adjustment plate has a transverse elongated hole B that matches the protective sleeve; the protective sleeve slides laterally with the transverse elongated hole B; the capping mechanism also includes a limiting nut; the limiting nut is threaded to the middle of the gear rod and abuts against the bottom end of the protective sleeve.

9. The capping device for large-diameter, high-specific-gravity material packaging bottles according to claim 5, characterized in that: The high-mounted component also includes a capping mechanism disposed between the two capping mechanisms; the capping mechanism includes a gantry frame, a vertical cylinder, and a pressure plate; the gantry frame is mounted on a height adjustment plate; the vertical cylinder is mounted on the top of the gantry frame; the output end of the vertical cylinder passes through the height adjustment plate and is rotatably connected to the pressure plate.

10. The capping device for large-diameter, high-specific-gravity material packaging bottles according to claim 9, characterized in that: The capping mechanism also includes a floating joint and a connecting rod; the upper end of the floating joint is connected to the output end of the vertical cylinder; the lower end of the floating joint is connected to the upper end of the connecting rod; and the lower end of the connecting rod is connected to the pressure plate.

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