Heat sealing structure for bags

Abstract

The present invention provides a heat-sealing structure for bags, belonging to the technical field of bag packaging equipment. It solves the problem that existing bags are prone to wrinkles during the packaging process, which affects the appearance. The heat-sealing structure for bags of the present invention includes a lifting plate, a heat pressing mechanism, and a clamping mechanism. In the present invention, when two clamping mechanisms respectively clamp the ends of each bag, and the two clamping mechanisms flatten the openings of each bag, the heat pressing mechanism heat-seals the openings of each bag. In this way, the two bags can be automatically heat-sealed, and wrinkles at the sealed ends of the bags during the heat-sealing process are avoided, and air leakage of the bags is avoided, which effectively increases the aesthetics of the bags after heat sealing.

Description

Technical Field

[0001] The invention belongs to the technical field of bag packaging equipment and relates to a heat sealing structure for bags. Background Art

[0002] The bag packaging equipment is a device that performs a heat sealing process on the opening of the bag, which can achieve the sealing of the bag, such as the one with publication number CN 112550857 A packaging bag automatic sealing device includes an automatic conveying module and a hot-pressing sealing module; the hot-pressing sealing module is located on one side of the automatic conveying module; the automatic conveying module includes a support platform and multiple belt conveying mechanisms, the support platform is provided with multiple parallel and spaced-apart give way slots, the multiple belt conveying mechanisms are respectively arranged corresponding to the multiple give way slots, and the belt of each belt conveying mechanism is provided with a pusher block arranged evenly spaced; the support platform is connected to a bag baffle plate located on one side of the hot-pressing sealing module, the bag baffle plate includes a horizontal section and an arc section, and the arc section is inclined upward from the horizontal section to the feeding position of the automatic conveying module; the present invention adopts the automatic conveying module to convey the packaging bag, and uses the bag baffle plate to block the bag through the hot-pressing sealing module, thereby performing the bag sealing process. Although the above scheme can achieve the sealing process of the bag, when the above scheme is used, if the bag opening is wrinkled during the conveying process or the bag is heat-sealed, the sealed portion of the bag after heat sealing will be wrinkled, and the bag is prone to air leakage. Secondly, it is also very easy to affect the aesthetics of the bag. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a heat-sealing structure that can improve the airtightness and aesthetics of the bag after heat sealing.

[0004] The object of the present invention can be achieved through the following technical solutions: A heat sealing structure for a bag, comprising:

[0005] lift board;

[0006] A hot pressing mechanism is movably provided on the bottom surface of the lifting plate. A pair of clamping mechanisms for clamping the ends of each bag are also provided on the bottom surface of the lifting plate, and one of the clamping mechanisms is movable relative to the lifting plate.

[0007] When the two clamping mechanisms clamp the ends of each bag respectively and flatten the opening of each bag, the heat pressing mechanism heat-seals the opening of each bag.

[0008] In the above-mentioned heat sealing structure for bags, the heat pressing mechanism includes a guide plate movably mounted on a lifting plate and the same number of heat pressing components as the bags. The guide plate can move relative to the lifting plate, and the heat pressing components can move relative to the lifting plate. The moving direction of the guide plate is perpendicular to the moving direction of the heat pressing components, and the guide plate can drive the heat pressing components to move.

[0009] In the above-mentioned heat sealing structure for bags, each of the hot pressing components includes a left pressure piece and a right pressure piece that are slidably connected to the bottom surface of the lifting plate, and the guide plate is provided with a traction hole that is slidably connected to the left pressure piece and a right inclined hole that is slidably connected to the right pressure piece.

[0010] In the above-mentioned heat sealing structure for bags, the left pressure piece includes a left pressure plate, a left guide rod is provided on the left pressure plate, the left guide rod passes through the lifting plate, a left roller is provided at the end of the left guide rod, the left roller is slidably inserted into the traction hole, the traction hole includes a left oblique hole and a vertical hole, and the extension line of the left oblique hole intersects with the extension line of the right oblique hole.

[0011] In the above-mentioned heat sealing structure for bags, the right pressure piece includes a right pressure seat, and a hot pressure plate is provided on the side of the right pressure seat facing the left pressure piece. At least two hot pressure rods are movably provided on the hot pressure plate, and the ends of the two hot pressure rods are connected by a hot pressure block. A hot pressure spring is sleeved on each of the hot pressure rods, and the hot pressure spring is located between the hot pressure block and the hot pressure plate. A right guide rod is provided on the right pressure seat, and the right guide rod passes through the lifting plate. A right roller is provided at the end of the right guide rod, and the right roller is slidably inserted into the right inclined hole.

[0012] In the above-mentioned heat sealing structure for bags, the bottom surface of the lifting plate is provided with a fourth guide rail slidably connected to the left pressure piece and the right pressure piece, and the top surface of the lifting plate is provided with a fifth guide rail slidably connected to the guide plate, and the fourth guide rail is perpendicular to the fifth guide rail.

[0013] In the above-mentioned heat-sealing structure for bags, a rack is provided on the top surface of the lifting plate, and a driving member engaged with the rack is provided on the guide plate. The driving member includes a third motor, and the third motor is provided with an upper bevel gear and a coaxially arranged lower bevel gear and a third gear. The lower bevel gear and the third gear are respectively located on both sides of the guide plate, the third gear is engaged with the rack, and the lower bevel gear is engaged with the upper bevel gear.

[0014] In the above heat sealing structure for bags, the lifting plate is provided with a bag pulling assembly for driving one of the clamping mechanisms to move. The bag pulling assembly is connected to the clamping mechanism, and the other clamping mechanism is connected to the bottom surface of the lifting plate.

[0015] In the above-mentioned heat-sealing structure for bags, each of the clamping mechanisms includes a back plate, which can be connected to a lifting plate or to a bag pulling assembly. A pair of movable plates are slidingly provided on one side of the back plate, and each movable plate is provided with two clamping rods, each clamping rod is located on the same plane, and the clamping rods on the two movable plates are staggered. A second motor is provided on the other side of the back plate, and the second motor is provided with a second gear that meshes with each movable plate. A third guide rail is provided on the back plate that is slidably connected to the movable plate.

[0016] In the above-mentioned heat sealing structure for bags, the bag pulling assembly includes a bag pulling motor arranged on a lifting plate and a clamping seat connected to one of the back plates. A screw is provided on the bag pulling motor, and a vertical plate is provided on the clamping seat. The screw thread passes through the vertical plate, and the clamping seat can slide relative to the lifting plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, when the two clamping mechanisms respectively clamp the ends of each bag and the two clamping mechanisms flatten the openings of each bag, the heat pressing mechanism heat-seals the openings of each bag. In this way, the two bags can be automatically heat-sealed, and wrinkles at the sealed ends of the bags during the heat-sealing process are avoided, which prevents air leakage from the bags and effectively improves the aesthetics of the bags after heat-sealing.

[0019] 2. After the two clamping mechanisms clamp the two bags and simultaneously flatten the openings of the two bags, it is necessary to drive the guide plate to move relative to the lifting plate so that the guide plate can simultaneously drive the two hot pressing components to close toward their respective centers until the hot pressing components contact the bags. The hot pressing components can then perform hot pressing and sealing on the openings of the bags to complete the simultaneous sealing of the two bags, thereby improving the efficiency of heat sealing.

[0020] 3. After the hot pressing block and the left pressing plate clamp the bag between them, the hot pressing block moves relative to the hot pressing plate, and the hot pressing rod shuttles inside the hot pressing plate, so that the hot pressing spring is compressed and generates elastic force, thereby completing the hot pressing process of the bag. Secondly, it can also have a buffering effect on the bag, thereby better protecting the bag, that is, avoiding the bag from being damaged during the hot pressing process between the left and right pressing pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of a preferred embodiment of the present invention.

[0022] Figure 2 This is an assembly diagram of the clamping mechanism, lifting plate, and bag pulling assembly.

[0023] Figure 3This is the assembly diagram of the clamping mechanism and the bag pulling component.

[0024] Figure 4 This is the assembly drawing of the lifting plate and the hot pressing mechanism.

[0025] Figure 5 yes Figure 4 Schematic diagram of the structure from another perspective.

[0026] Figure 6 It is a structural diagram of the guide plate.

[0027] Figure 7 It is a structural diagram of the right pressure piece.

[0028] Figure 8 It is a structural diagram of the left pressure piece. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 1 — Figure 8 As shown, a heat sealing structure for bags of the present invention includes a lifting plate 100 , a heat pressing mechanism 300 and a clamping mechanism 200 .

[0031] In the present invention, the heat-sealing structure can heat-seal the openings of two bags simultaneously.

[0032] The hot pressing mechanism 300 is movably arranged on the bottom surface of the lifting plate 100. A pair of clamping mechanisms 200 for clamping the ends of each bag are also provided on the bottom surface of the lifting plate 100. One of the clamping mechanisms 200 can move relative to the lifting plate 100. When the two clamping mechanisms 200 clamp the ends of each bag respectively and the two clamping mechanisms 200 flatten the openings of each bag, the hot pressing mechanism 300 heat-seals the openings of each bag. When the bags are hot-pressed and sealed, the clamping mechanism 200 needs to be aligned with the openings of the bags, and the two clamping mechanisms 200 clamp the two ends of the two bags respectively. After that, one of the clamping mechanisms 200 moves away from the lifting plate 100. The two bags are automatically dropped in this way, and the automatic heat sealing of the two bags is completed, which also avoids wrinkles at the sealing portion of the bag during the heat sealing process, avoids air leakage in the bag, and effectively increases the aesthetics of the bag after heat sealing.

[0033] like Figure 1 and Figure 4 — Figure 8 As shown, the hot pressing mechanism 300 includes a guide plate 310 movably mounted on the lifting plate 100 and hot pressing components 320 with the same number as the bags. The guide plate 310 can move relative to the lifting plate 100, and the hot pressing components 320 can move relative to the lifting plate 100. The moving direction of the guide plate 310 is perpendicular to the moving direction of the hot pressing components 320. The guide plate 310 can drive the hot pressing components 320 to move. When the two clamping mechanisms 200 clamp the bags and flatten the openings of the bags, it is necessary to drive the guide plate 310 to move relative to the lifting plate 100 so that the guide plate 310 can simultaneously drive the two hot pressing components 320 to close toward their respective centers until the hot pressing components 320 contact the bags. The hot pressing components 320 can then perform hot pressing and sealing on the openings of the bags to complete the simultaneous sealing of the two bags, thereby improving the efficiency of heat sealing.

[0034] When the guide plate 310 moves relative to the lifting plate 100, the left pressure piece 321 will be affected by the path of the traction hole 311, so that the left pressure piece 321 moves accordingly relative to the lifting plate 100. At the same time, the right pressure piece 322 will also be affected by the path of the right inclined hole 312, so that the right pressure piece 322 moves accordingly relative to the lifting plate 100. That is, the right pressure piece 322 and the left pressure piece 321 are closed between them, so that the bag between them can be hot-pressed. When the hot-pressing process is completed, the guide plate 310 moves in the opposite direction relative to the lifting plate 100, and the left pressure piece 321 and the right pressure piece 322 also move in the opposite direction, thereby realizing that the hot-pressing assembly 320 releases the bag.

[0035] The left pressure piece 321 includes a left pressure plate 3211, and a left guide rod 3212 is provided on the left pressure plate 3211. The left guide rod 3212 passes through the lifting plate 100, and a left roller 3213 is provided at the end of the left guide rod 3212. The left roller 3213 is slidably inserted into the traction hole 311, and the traction hole 311 includes a left oblique hole 311a and a vertical hole 311b. The extension line of the left oblique hole 311a intersects with the extension line of the right oblique hole 312, and the left oblique hole 311a and the right oblique hole 312 are in an eight-shaped shape. The left oblique hole 311a and the vertical hole 311b are connected end to end. The right pressure piece 322 includes a right pressure seat 3221, and a hot pressing plate 3222 is provided on the side of the right pressure seat 3221 facing the left pressure piece 321. At least two hot pressing plates 3222 are movably provided on the hot pressing plate 3222. The pressure rod 3223, the ends of the two hot pressure rods 3223 are connected by a hot pressure block 3224, and each of the hot pressure rods 3223 is provided with a hot pressure spring 3225, which is located between the hot pressure block 3224 and the hot pressure plate 3222. The right pressure seat 3221 is provided with a right guide rod 3226, and the right guide rod 3226 passes through the lifting plate 100. The end of the right guide rod 3226 is provided with a right roller 3227, and the right roller 3227 is slidably inserted into the right inclined hole 312. The bottom surface of the lifting plate 100 is provided with a fourth guide rail 110 that is slidably connected to the left pressure piece 321 and the right pressure piece 322, and the top surface of the lifting plate 100 is provided with a fifth guide rail 120 that is slidably connected to the guide plate 310, and the fourth guide rail 110 is perpendicular to the fifth guide rail 120.

[0036] When the guide plate 310 moves on the fifth guide rail 120 relative to the lifting plate 100, the left roller 3213 slides and is stuck in the traction hole 311, the right roller 3227 slides and is stuck in the right inclined hole 312, and the left pressure plate 3211 and the right pressure seat 3221 are both slidably connected to the fourth guide rail 110, so that the left roller 3213 slides from the left inclined hole 311a to the vertical hole 311b relative to the lifting plate 100, and the right roller 3227 slides from one end of the right inclined hole 312 away from the vertical hole 311b to the other end relative to the lifting plate 100. At the same time, the left roller 3213 is connected to the left pressure plate 3211 through the left guide rod 3212, and the right roller 3227 is connected to the right pressure seat 3221 through the right guide rod 3226. When the left roller 3213 moves in the left oblique hole 311a, the left pressure plate 3211 will move relative to the lifting plate 100 along the fourth guide rail 110 toward the right pressure seat 3221; when the left roller 3213 moves in the vertical hole 311b, the left pressure plate 3211 will remain stationary relative to the lifting plate 100; when the right roller 3227 moves in the right oblique hole 312, the right pressure seat 3221 will move relative to the lifting plate 100 along the fourth guide rail 110 toward the left pressure plate 3211 until the hot pressing block 3224 on the right pressure seat 3221 contacts the left pressure plate 3211. Since the hot pressing block 3224 is always in an electrically heated state, the bag between the left pressure plate 3211 and the hot pressing block 3224 can be successfully heat-sealed.

[0037] Furthermore, when the right pressure seat 3221 moves relative to the fourth guide rail 110, since the hot pressing block 3224 is installed on the hot pressing plate 3222 through the hot pressing rod 3223, the hot pressing plate 3222 and the right pressure seat 3221 are formed as one piece, so that the right pressure seat 3221 drives the hot pressing block 3224 to move synchronously, and when the hot pressing block 3224 and the left pressure plate 3211 clamp the bag located therebetween, the hot pressing block 3224 moves relative to the hot pressing plate 3222, and the hot pressing rod 3223 shuttles inside the hot pressing plate 3222, so that the hot pressing spring 3225 is compressed and generates elastic force, thereby completing the hot pressing process of the bag. Secondly, it can also have a buffering effect on the bag, thereby better protecting the bag, that is, avoiding the bag from being damaged during the hot pressing process of the left pressure piece 321 and the right pressure piece 322.

[0038] A rack 130 is provided on the top surface of the lifting plate 100, and a driving member 313 meshing with the rack 130 is provided on the guide plate 310. Specifically, the driving member 313 includes a third motor 3131, and the third motor 3131 is provided with an upper bevel gear 3131a and a coaxially arranged lower bevel gear 3132 and a third gear 3133. The lower bevel gear 3132 and the third gear 3133 are respectively located on both sides of the guide plate 310. The third gear 3133 meshes with the rack 130, and the lower bevel gear 3132 meshes with the upper bevel gear 3131a. When working, the third motor 3131 drives the upper bevel gear 3131 a rotates, because the upper bevel gear 3131a is engaged with the lower bevel gear 3132, and the lower bevel gear 3132 is connected to the third gear 3133 through the same shaft, the third gear 3133 is engaged with the rack 130, and the rack 130 is installed on the top of the lifting plate 100, so that the upper bevel gear 3131a can drive the lower bevel gear 3132 and the third gear 3133 to rotate simultaneously. In addition, because the guide plate 310 is slidably installed on the lifting plate 100 through the fifth guide rail 120, when the third gear 3133 rolls on the rack 130, the guide plate 310 will move relative to the lifting plate 100 along the trajectory of the fifth guide rail 120.

[0039] like Figure 1 — Figure 3 As shown, the lifting plate 100 is provided with a bag pulling assembly 140 for driving one of the clamping mechanisms 200 to move. The bag pulling assembly 140 is connected to the clamping mechanism 200, and the other clamping mechanism 200 is connected to the bottom surface of the lifting plate 100. Through the above structure, the two clamping mechanisms 200 can flatten the opening of the bag.

[0040] Furthermore, each of the clamping mechanisms 200 includes a back plate 210, which can be connected to the lifting plate 100 or to the bag pulling assembly 140. Specifically, the back plate 210 of the clamping mechanism 200 that is slidably connected to the lifting plate 100 is connected to the bag pulling assembly 140, and the other back plate 210 is detachably connected to the bottom surface of the lifting plate 100, so that the bag pulling assembly 140 can drive the clamping mechanism 200 connected thereto to move away from the other clamping mechanism 200, that is, the distance between the two clamping mechanisms 200 can be increased, thereby flattening the opening of the bag located between the two clamping mechanisms 200.

[0041] A pair of movable plates 220 are slidably provided on one side of the back plate 210, and each movable plate 220 is provided with two clamping rods 221, and each clamping rod 221 is located on the same plane. The clamping rods 221 on the two movable plates 220 are staggered. A second motor 230 is provided on the other side of the back plate 210, and the second motor 230 is provided with a second gear 231 engaged with each movable plate 220. A third guide rail 211 is provided on the back plate 210 and is slidably connected to the movable plate 220. When the second motor 230 drives the second gear 231 to rotate, the two movable plates 220 are rotated. 0 are both engaged with the second gear 231, so that the second gear 231 can drive the movable plate 220 to move on the corresponding third guide rail 211, and the two movable plates 220 are respectively located on both sides of the second gear 231, and the clamping rods 221 on the two movable plates 220 are staggered, so that when the movable plates 220 move, two adjacent clamping rods 221 on different movable plates 220 can clamp the ends of the bag; secondly, because each movable plate 220 has two clamping rods 221, it is possible to achieve that one clamping mechanism 200 can clamp the ends of two bags at the same time.

[0042] The bag pulling assembly 140 includes a bag pulling motor 141 provided on the lifting plate 100 and a clamping seat 142 connected to one of the back plates 210. The bag pulling motor 141 is provided with a screw rod 143, and the clamping seat 142 is provided with a vertical plate 144. The screw rod 143 is threaded through the vertical plate 144. The clamping seat 142 can slide relative to the lifting plate 100. The bottom surface of the lifting plate 100 is provided with a slide rail 150. The clamping seat 142 is provided with a slide rail 150 that is slidably connected to the slide rail 150. Block 145, when the bag pulling motor 141 drives the screw rod 143 to rotate, since the clamping seat 142, the vertical plate 144 and the back plate 210 are connected by threads, the screw rod 143 threads through the vertical plate 144, so that the screw rod 143 can drive the vertical plate 144 and the back plate 210 to move in a directional manner along the track of the slide rail 150, that is, the clamping mechanism 200 connected to the bag pulling assembly 140 can move relative to the lifting plate 100, that is, the distance between the two clamping mechanisms 200 can be changed.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A heat sealing structure for a bag, characterized in that: include: lift board; A hot pressing mechanism is movably provided on the bottom surface of the lifting plate. A pair of clamping mechanisms for clamping the ends of each bag are also provided on the bottom surface of the lifting plate, and one of the clamping mechanisms is movable relative to the lifting plate. When the two clamping mechanisms clamp the ends of each bag respectively and flatten the opening of each bag, the heat pressing mechanism heat-seals the opening of each bag; The hot pressing mechanism includes a guide plate movably mounted on the lifting plate and the same number of hot pressing components as the bags. The guide plate can move relative to the lifting plate, and the hot pressing components can move relative to the lifting plate. The moving direction of the guide plate is perpendicular to the moving direction of the hot pressing components, and the guide plate can drive the hot pressing components to move. Each of the hot pressing components includes a left pressing member and a right pressing member that are slidably connected to the bottom surface of the lifting plate, and the guide plate is provided with a traction hole that is slidably connected to the left pressing member and a right oblique hole that is slidably connected to the right pressing member; The left pressure member includes a left pressure plate, a left guide rod is provided on the left pressure plate, the left guide rod passes through the lifting plate, a left roller is provided at the end of the left guide rod, the left roller is slidably inserted into the traction hole, the traction hole includes a left oblique hole and a vertical hole, and the extension line of the left oblique hole intersects with the extension line of the right oblique hole; The right pressure piece includes a right pressure seat, a hot pressing plate is provided on the right pressure seat on the side facing the left pressure piece, at least two hot pressing rods are movably provided on the hot pressing plate, the ends of the two hot pressing rods are connected by a hot pressing block, a hot pressing spring is sleeved on each of the hot pressing rods, and the hot pressing spring is located between the hot pressing block and the hot pressing plate, a right guide rod is provided on the right pressure seat, the right guide rod passes through the lifting plate, and a right roller is provided at the end of the right guide rod, and the right roller is slidably inserted into the right oblique hole; A rack is provided on the top surface of the lifting plate, and a driving member engaged with the rack is provided on the guide plate. The driving member includes a third motor, and the third motor is provided with an upper bevel gear and a coaxially arranged lower bevel gear and a third gear. The lower bevel gear and the third gear are respectively located on both sides of the guide plate, the third gear is engaged with the rack, and the lower bevel gear is engaged with the upper bevel gear.

2. A heat sealing structure for bags according to claim 1, characterized in that: The bottom surface of the lifting plate is provided with a fourth guide rail slidably connected to the left pressure piece and the right pressure piece, and the top surface of the lifting plate is provided with a fifth guide rail slidably connected to the guide plate, and the fourth guide rail is perpendicular to the fifth guide rail.

3. The heat sealing structure for bags according to claim 1, characterized in that: The lifting plate is provided with a bag pulling assembly for driving one of the clamping mechanisms to move. The bag pulling assembly is connected to the clamping mechanism, and the other clamping mechanism is connected to the bottom surface of the lifting plate.

4. A heat sealing structure for bags according to claim 3, characterized in that: Each of the clamping mechanisms includes a back plate, which can be connected to a lifting plate or a bag pulling assembly. A pair of movable plates are slidingly provided on one side of the back plate, and each movable plate is provided with two clamping rods, each clamping rod is located on the same plane, and the clamping rods on the two movable plates are staggered. A second motor is provided on the other side of the back plate, and the second motor is provided with a second gear that meshes with each movable plate. A third guide rail is provided on the back plate that is slidably connected to the movable plate.

5. The heat sealing structure for bags according to claim 4, characterized in that: The bag pulling assembly includes a bag pulling motor arranged on the lifting plate and a clamping seat connected to one of the back plates. The bag pulling motor is provided with a screw rod, and the clamping seat is provided with a vertical plate. The screw rod thread passes through the vertical plate, and the clamping seat can slide relative to the lifting plate.

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