Rapid loading mechanism for steel coil reel

Abstract

The utility model discloses a quick loading mechanism for a steel coil reel, which belongs to the technical field of steel coils and comprises a moving frame, an electric roller A, a hydraulic rod, a loading frame, a rotating support, an adjusting groove, a sliding frame, a sliding groove and a sliding support, the hydraulic rod is fixedly mounted above the moving frame, and the loading frame is fixedly mounted between the upper portions of the ends of the hydraulic rod. Electric rollers A are rotationally arranged in front of and behind the lower part of the moving frame through bearings, and a rotating bracket is rotationally arranged below the interior of the loading frame through a bearing. After a steel coil reel is driven to make contact with the upper portion of a truck to place a steel coil, a servo motor matched with an electric roller C is started to drive the electric roller C to move reversely on the inner side of an adjusting groove, two sliding frames are driven to slide in the opposite directions on the inner side of the adjusting groove, and a loading support and two pressing and supporting frames are driven to slide out of grooves in the two sides of the steel coil reel; and rapid loading treatment of the steel coil reels is completed, and workers can conveniently and rapidly load the steel coil reels of different specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel coils, and particularly relates to a rapid loading mechanism for a steel coil reel. Background Art

[0002] A steel coil is steel that is formed by passing steel through two pressure rollers and rolling the steel into an extremely long steel strip or thin steel plate through cold rolling or hot rolling. For convenient transportation or storage, the extremely long steel strip or thin steel plate is wound around the outer ring of a reel to form a coiled steel, which is called a steel coil.

[0003] Among them, through retrieval, it is found that the application number is CN202120684922.4, which is a special lifting kit for steel coils. On one side of the connecting rod close to the first hook and the second hook of this special lifting kit for steel coils, an adjustment box is provided. The setting of the adjustment box can adjust the position between the first hook and the second hook, and the position of the hook can be adjusted according to the size of the lifted steel coil. At the same time, the two hooks can be combined to lift a steel coil. The deficiencies are as follows:

[0004] When the staff uses this special lifting kit for steel coils to lift the steel coil, the setting of the adjustment box can adjust the position between the first hook and the second hook. Operating the adjustment wheel can drive the threaded rod to rotate, so that the threaded ring moves horizontally, further driving the second hook to move. The position of the hook can be adjusted according to the size of the lifted steel coil. At the same time, the two hooks can be combined to lift a steel coil. After the steel coil is lifted, due to the small contact area between the second hook and the steel coil, when the steel coil is lifted and transported, because there is no limit, it is easy for the steel coil to move when it is transported to the designated ground position or loaded, resulting in inconvenient unloading of the steel coil. Content of the Utility Model

[0005] The purpose of the utility model is to provide a rapid loading mechanism for a steel coil reel in order to solve the problem that the unloading of the steel coil by this special lifting kit for steel coils is slightly inconvenient.

[0006] The technical solution adopted by the present utility model is as follows: A rapid loading mechanism for a steel coil reel, comprising a moving frame, an electric roller A, a hydraulic rod, a loading frame, a rotating bracket, an adjustment groove, a sliding frame, a sliding groove and a sliding bracket. Above the moving frame, a hydraulic rod is fixedly installed. Between the upper ends of the hydraulic rod, a loading frame is fixedly installed. At the front and rear of the lower part of the moving frame, electric rollers A are rotatably arranged through bearings. Inside the lower part of the loading frame, a rotating bracket is rotatably arranged through a bearing. Above both sides of the rotating bracket, adjustment grooves are embedded. Inside the upper part of the adjustment groove, a sliding frame is relatively slidably arranged through sliders. Inside the sliding frame, a sliding groove is embedded. Inside the lower part of the sliding groove, a sliding bracket is slidably arranged. Outside the rotating bracket, a rotating loading mechanism for conveniently adjusting the loading angle of the steel coil reel is arranged. Below the sliding frame, an adjustment loading mechanism for loading steel coil reels of different specifications and a pressing mechanism for preventing the steel coil reel from rotating during loading are respectively arranged.

[0007] Among them, the adjustment loading mechanism is composed of teeth, a servo motor, a gear, an electric roller C, a loading bracket, a damping telescopic rod B and a support frame. At the four corners of the lower part of the sliding frame near the inside of the adjustment groove, electric rollers C are rotatably arranged through bearings. On the side of the sliding bracket, teeth are fixedly installed. There are several teeth, which are arranged in equidistant parallel. In front of the inner wall of the sliding groove near the side of the sliding bracket, a servo motor is fixedly installed. The servo motor is connected to a gear through an output shaft, and the gear and several teeth are in meshing transmission. On the side of the sliding bracket, a loading bracket is relatively fixedly installed. Outside the loading bracket, eight damping telescopic rods B are fixedly installed. Every two of them are arranged in relative equidistant parallel and are centrosymmetrically arranged. Between the ends of the two juxtaposed damping telescopic rods B, a support frame is fixedly installed. The support frame is arc-shaped, and the side of the support frame is inclined.

[0008] Among them, the rotating loading mechanism is composed of an electric roller B, a limiting groove, a damping telescopic rod A and a limiting block. Inside the lower part of both sides of the rotating bracket, electric rollers B are rotatably arranged through bearings. Inside the lower part of the rotating bracket, a limiting groove is embedded. There are several limiting grooves, which are arranged in semi-circular equidistant rings. On both sides of the lower part of the inner wall of the loading frame near both sides of the lower part of the rotating bracket, damping telescopic rods A are fixedly installed, and springs are arranged on the outside of the damping telescopic rods A. Above the end of the damping telescopic rod A, a limiting block is fixedly installed, and the limiting block is slidably fitted inside the limiting groove.

[0009] Among them, the pressing mechanism is composed of a damping telescopic rod C and a pressing plate. On both sides of the lower part of the sliding frame, damping telescopic rods C are fixedly installed, and springs are arranged on the outside of the damping telescopic rods C. Between the lower ends of the damping telescopic rods C, a pressing plate is fixedly installed. The pressing plate is arc-shaped, and the material of the pressing plate is cis-butadiene rubber.

[0010] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0011] 1. The rapid loading mechanism of this steel coil reel can enable the staff to cooperate through the toothed teeth, servo motor, gear, electric roller C and the loading bracket, damping expansion link B and the support bracket. By driving the gear and several toothed teeth to engage and transmit with the servo motor, the sliding bracket is driven to slide up or down inside the chute. The electric roller C drives the sliding frame to move inside the adjustment groove, and the support bracket is squeezed to freely expand and contract through the damping expansion link B and the outer spring on both sides of the steel coil reel, facilitating the staff to quickly load steel coil reels of different specifications.

[0012] 2. The rapid loading mechanism of this steel coil reel can enable the staff to cooperate through the electric roller B, limit groove, damping expansion link A and the limit block. By driving the rotating bracket to rotate through the bearing by the electric roller B under the loading rack, and squeezing the limit block to freely slide and limit inside the limit groove through the damping expansion link A and the outer spring, it facilitates the staff to quickly adjust the placement direction of the steel coil reel.

[0013] 3. The rapid loading mechanism of this steel coil reel can enable the staff to cooperate through the damping expansion link C and the pressing plate. By contracting the pressing plate through the damping expansion link C and the outer spring, the contracted damping expansion link C and the outer spring generate a reaction force on the pressing plate for pressing and fixing, improving the effect of firmly limiting the steel coil reel during loading. Description of the Drawings

[0014] Figure 1 It is a front view three-dimensional structural schematic diagram of the loading rack of the present utility model;

[0015] Figure 2 It is a front view sectional view of the loading rack of the present utility model in the use state;

[0016] Figure 3 In the present utility model Figure 2 It is an enlarged structural schematic diagram of part A;

[0017] Figure 4 In the present utility model Figure 3 It is an enlarged structural schematic diagram of part B;

[0018] Figure 5 It is a front view three-dimensional structural schematic diagram of the loading bracket of the present utility model.

[0019] Markings in the figure: 1. Moving frame; 101. Electric roller A; 102. Hydraulic rod; 103. Loading frame; 104. Rotating bracket; 105. Electric roller B; 106. Limiting groove; 107. Damping telescopic rod A; 108. Limiting block; 2. Adjusting groove; 201. Sliding frame; 202. Chute; 203. Sliding bracket; 204. Teeth; 205. Servo motor; 206. Gear; 207. Electric roller C; 3. Loading bracket; 301. Damping telescopic rod B; 302. Support frame; 4. Damping telescopic rod C; 401. Pressing plate. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the present invention:

[0022] Embodiment 1: Refer to Figures 1-5 , a rapid loading mechanism for a steel coil reel, including a moving frame 1, an electric roller A 101, a hydraulic rod 102, a loading frame 103, a rotating bracket 104, an adjusting groove 2, a sliding frame 201, a chute 202 and a sliding bracket 203. A hydraulic rod 102 is fixedly installed above the moving frame 1, and a loading frame 103 is fixedly installed between the upper ends of the hydraulic rod 102. Electric rollers A 101 are rotatably arranged at the front and rear of the lower part of the moving frame 1 through bearings. A rotating bracket 104 is rotatably arranged at the lower part of the loading frame 103 through a bearing. Adjusting grooves 2 are embedded on both sides above the rotating bracket 104. A sliding frame 201 is relatively slidably arranged above the adjusting groove 2 through a slider. A chute 202 is embedded below the sliding frame 201, and a sliding bracket 203 is slidably arranged below the chute 202. A rotating loading mechanism for conveniently adjusting the loading angle of the steel coil reel is arranged outside the rotating bracket 104. An adjusting loading mechanism for loading steel coil reels of different specifications and a pressing mechanism for preventing the steel coil reel from rotating during loading are respectively arranged below the sliding frame 201.

[0023] Refer to Figures 1-5 , further, the adjusting loading mechanism is composed of teeth 204, a servo motor 205, a gear 206, an electric roller C 207 and a loading bracket 3, a damping telescopic rod B 301 and a support frame 302;

[0024] There are electric rollers C207 rotatably arranged through bearings at the four corners under the sliding frame 201 close to the inside of the adjustment groove 2. A toothed tooth 204 is fixedly installed on the side of the sliding support 203. There are several toothed teeth 204, which are arranged in equidistant parallel. A servo motor 205 is fixedly installed on the front of the inner wall of the chute 202 close to the side of the sliding support 203. The servo motor 205 is connected with a gear 206 through an output shaft, and the gear 206 and several toothed teeth 204 are in meshing transmission. A loading support 3 is fixedly installed relatively on the side of the sliding support 203. An eight damping telescopic rod B301 is fixedly installed on the outer ring of the loading support 3. There are eight damping telescopic rod B301, and every two are in relative equidistant parallel and are centrosymmetrically arranged. A support 302 is fixedly installed between the ends of the two juxtaposed damping telescopic rod B301. The support 302 is arc-shaped, and the side of the support 302 is inclined. When the staff needs to load the steel coil reel onto the truck, after driving the truck under the loading rack 103, turn on the servo motor of the electric roller A101 to drive the electric roller A101 to drive the loading rack 103 on the ground to move towards the steel coil reel on the ground behind the truck. After the rotating support 104 is above the steel coil reel, control the hydraulic rod 102 to lower the loading rack 103 so that the loading support 3 is on both sides of the steel coil reel. The staff turns on the servo motor 205 to drive the gear 206 and several toothed teeth 204 to engage and drive, driving the sliding support 203 to slide downward inside the chute 202. After driving the loading support 3 to face the grooves on both sides of the steel coil reel, the staff turns on the servo motor of the electric roller C207 to drive the electric roller C207 to move inside the adjustment groove 2, driving the sliding frame 201 to move in the relative direction inside the adjustment groove 2. While the opposite loading supports 3 slide into the grooves on both sides of the steel coil reel respectively, the inclined surface on the side of the support 302 contacts the outer wall of the groove and squeezes the support 302 to contract through the damping telescopic rod B301 and the outer spring. After the two support frames 302 contract to a suitable position, the arc surface of the support frame 302 slides into the grooves on both sides of the steel coil reel and squeezes and contacts the inner wall of the grooves on both sides of the steel coil reel. Then the staff controls the hydraulic rod 102 to raise the loading rack 103, driving the steel coil reel to rise and turning on the servo motor of the electric roller A101 to drive the electric roller A101 to drive the loading rack 103 on the ground to move to the loading position above the truck. Then control the hydraulic rod 102 to lower the loading rack 103, driving the steel coil reel to contact above the truck and place the steel coil. Turn on the servo motor of the electric roller C207 to drive the electric roller C207 to move in the reverse direction inside the adjustment groove 2, driving the two sliding frames 201 to slide in the opposite direction inside the adjustment groove 2, driving the loading support 3 and the two support frames 302 to slide out of the grooves on both sides of the steel coil reel, and completing the rapid loading process of the steel coil reel, facilitating the staff to quickly load different specifications of steel coil reels.

[0025] Refer to Figures 2-3, Further, the rotating loading mechanism is composed of an electric roller B105, a limit groove 106, a damping telescopic rod A107, and a limit block 108;

[0026] On both sides of the lower part inside the rotating bracket 104, electric rollers B105 are rotatably arranged through bearings. A limit groove 106 is embedded in the lower part of the rotating bracket 104. There are several limit grooves 106, and they are arranged in a semi-circular shape at equal intervals. On both sides of the lower part of the inner wall of the loading rack 103, close to both sides of the lower part of the rotating bracket 104, damping telescopic rods A107 are fixedly installed, and springs are arranged on the outer sides of the damping telescopic rods A107. Above the end of the damping telescopic rod A107, a limit block 108 is fixedly installed, and the limit block 108 is fitted and slidably arranged inside the limit groove 106. When the staff limits and supports the steel coil reel through the loading bracket 3 and controls the hydraulic rod 102 to lift the loading rack 103, driving the steel coil reel to rise and turning on the servo motor supporting the electric roller A101 to drive the electric roller A101 to move the loading rack 103 on the ground to the loading position above the truck, when it is necessary to adjust the loading direction of the steel coil reel, turn on the servo motor supporting the electric roller B105 to drive the electric roller B105 to move under the lower part of the loading rack 103, driving the rotating bracket 104 to rotate through the bearing, and squeezing the limit block 108 to slide out of the limit groove 106, driving the damping telescopic rod A107 and the outer spring to contract. After the steel coil reel under the rotating bracket 104 rotates to a suitable placement direction, the damping telescopic rod A107 and the outer spring eject the limit block 108 to slide into the inner side of one of the relative limit grooves 106. After the rotating bracket 104 is limited, control the hydraulic rod 102 to lower the loading rack 103, driving the steel coil reel to contact above the truck to place the steel coil, facilitating the staff to quickly adjust and place the placement direction of the steel coil reel.

[0027] Refer to Figures 1-4 , Further, the pressing mechanism is composed of a damping telescopic rod C4 and a pressing plate 401;

[0028] On both sides below the sliding frame 201, damping telescopic rods C4 are fixedly installed, and springs are arranged in a matching manner on the outer sides of the damping telescopic rods C4. Between the lower ends of the damping telescopic rods C4, a pressing plate 401 is fixedly installed, and the pressing plate 401 is arc-shaped. The pressing plate 401 is made of cis-butadiene rubber. When the staff supports the steel coil reel through the loading bracket 3 for limiting, the servo motor 205 is turned on to drive the gear 206 and a number of teeth 204 to engage and drive, driving the sliding bracket 203 to slide upward inside the chute 202, raising the steel coil reel so that both sides above contact the pressing plate 401. Then, the pressing plate 401 will be squeezed to drive the damping telescopic rods C4 and the outer springs to contract, so that the pressing plate 401 is squeezed and contacts the surface of the steel coil reel. Because the pressing plate 401 made of cis-butadiene rubber has the characteristics of wear resistance, aging resistance and elasticity, after a large-area squeezing contact between the steel coil reel and the pressing plate 401 made of cis-butadiene rubber generates a large friction, the pressing and limiting treatment of the steel coil reel is completed, which can avoid the rotation and displacement of the steel coil reel during the loading process, affecting the efficiency of the staff when loading the steel coil reel, and improving the effect of the stable limiting treatment of the steel coil reel during the loading process.

[0029] Refer to Figures 1-4 Furthermore, the hydraulic rod 102 is electrically connected to the storage battery through a matching hydraulic pump and a matching control panel. The electric rollers A101, electric rollers B105 and electric rollers C207 are all electrically connected to the storage battery through a matching servo motor and a matching control panel. The servo motor 205 is electrically connected to the storage battery through a matching control panel. Embodiment

[0030] As Figures 1-5 shown, in addition to the embodiment where the pressing plate 401 is made of cis-butadiene rubber, there is another implementation mode of the present utility model. The pressing plate 401 is made of nitrile rubber. Because the nitrile rubber material has the characteristics of tear resistance, high tensile strength, high mechanical strength and wear resistance, when the pressing plate 401 is squeezed and contacts the surface of the steel coil reel, a large friction is generated between the surface of the steel coil reel and the pressing plate 401. When the steel coil reel is pressed and limited, it can avoid the tearing damage on the surface of the pressing plate 401 when the friction is large. Compared with the first implementation mode, the pressing plate 401 has higher strength.

[0031] Working principle: First, when the staff needs to load the steel coil reel onto the truck, after driving the truck under the loading rack 103, turn on the servo motor of the electric roller A101 to drive the electric roller A101 on the ground to move the loading rack 103 towards the steel coil reel on the ground behind the truck. After the rotating bracket 104 is above the steel coil reel, control the hydraulic rod 102 to lower the loading rack 103 so that the loading bracket 3 is on both sides of the steel coil reel. The staff turns on the servo motor 205 to drive the gear 206 to engage and drive with a number of teeth 204, driving the sliding bracket 203 to slide downward inside the chute 202. After driving the loading bracket 3 to be opposite to the grooves on both sides of the steel coil reel, the staff turns on the servo motor of the electric roller C207 to drive the electric roller C207 to move inside the adjustment groove 2, driving the sliding frame 201 to move in the opposite direction inside the adjustment groove 2. While the opposite loading brackets 3 slide into the grooves on both sides of the steel coil reel respectively, the inclined surface on the side of the support frame 302 contacts the outer wall of the groove and squeezes the support frame 302 to contract through the damping expansion rod B301 and the outer spring. After the two pressure support frames 302 contract to a suitable position, the arc surface of the pressure support frame 302 slides into the grooves on both sides of the steel coil reel and squeezes and contacts the inner wall of the grooves on both sides of the steel coil reel. Then, the staff turns on the servo motor 205 to drive the gear 206 to engage and drive with a number of teeth 204, driving the sliding bracket 203 to slide upward inside the chute 202 to lift the steel coil reel so that the upper sides on both sides contact the pressure plate 401, and then squeeze the pressure plate 401 to drive the damping expansion rod C4 and the outer spring to contract, so that the pressure plate 401 squeezes and contacts the surface of the steel coil reel. Because the pressure plate 401 made of cis-butadiene rubber has the characteristics of wear resistance, aging resistance and elasticity, after a large-area extrusion contact between the steel coil reel and the pressure plate 401 made of cis-butadiene rubber generates a large friction, the pressing and limiting treatment of the steel coil reel is completed, avoiding the rotation and displacement of the steel coil reel during the loading process. Then, the staff controls the hydraulic rod 102 to lift the loading rack 103, driving the steel coil reel to rise and turning on the servo motor of the electric roller A101 to drive the electric roller A101 to move the loading rack 103 to the loading position above the truck on the ground. Finally, when the staff needs to adjust the loading direction of the steel coil reel, turn on the servo motor of the electric roller B105 to drive the electric roller B105 to move under the loading rack 103 inside, driving the rotating bracket 104 to rotate through the bearing, and squeezing the limit block 108 to slide out of the limit groove 106 to drive the damping expansion rod A107 and the outer spring to contract. After the steel coil reel under the rotating bracket 104 rotates to the appropriate placement direction, the damping expansion rod A107 and the outer spring pop out the limit block 108 to slide into one of the opposite limit grooves 106 inside. After limiting the rotating bracket 104, control the hydraulic rod 102 to lower the loading rack 103, driving the steel coil reel to contact above the truck to place the steel coil, and then quickly load other steel coil reels of different specifications in the same way.

[0032] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A quick loading mechanism for a steel coil reel, comprising a moving frame (1), an electric roller A (101), a hydraulic rod (102), a loading frame (103), a rotating bracket (104), an adjusting groove (2), a sliding frame (201), a sliding groove (202) and a sliding bracket (203), wherein a hydraulic rod (102) is fixedly mounted above the moving frame (1), a loading frame (103) is fixedly mounted between the ends of the hydraulic rod (102), electric rollers A (101) are rotatably mounted at the front and rear sides of the moving frame (1) through bearings, a rotating bracket (104) is rotatably mounted at the bottom of the loading frame (103) through bearings, an adjusting groove (2) is embedded at both sides of the rotating bracket (104), a sliding frame (201) is relatively slidably mounted at the top of the adjusting groove (2) through a slider, a sliding groove (202) is embedded at the bottom of the sliding frame (201), and a sliding bracket (203) is slidably mounted at the bottom of the sliding groove (202), characterized in that: A rotating loading mechanism for adjusting the steel coil loading angle is arranged outside the rotating bracket (104), and an adjusting loading mechanism for loading steel coils of different specifications and a pressing mechanism for preventing the steel coils from rotating when being loaded are arranged below the sliding frame (201).

2. A quick loading mechanism for a steel coil reel as claimed in claim 1, characterized in that: The regulating loading mechanism is composed of teeth (204), a servo motor (205), a gear (206), an electric roller C (207), a loading bracket (3), a damping telescopic rod B (301), and a support frame (302); Electric rollers C (207) are rotatably arranged at the four corners below the sliding bracket (201) near the inside of the adjustment slot (2) via bearings; teeth (204) are fixedly installed on the side of the sliding bracket (203); a servo motor (205) is fixedly installed on the front of the inner wall of the sliding slot (202) near the side of the sliding bracket (203); the servo motor (205) is connected to a gear (206) via an output shaft, and the gear (206) and the plurality of teeth (204) are arranged in a meshing transmission arrangement; a loading bracket (3) is relatively fixedly installed on the side of the sliding bracket (203); a damping telescopic rod B (301) is fixedly installed on the outer ring of the loading bracket (3); and a support frame (302) is fixedly installed between the ends of two parallel damping telescopic rods B (301).

3. A quick loading mechanism for a steel coil reel as claimed in claim 1, characterized in that: The rotating loading mechanism is composed of an electric roller B (105), a limiting groove (106), a damping telescopic rod A (107), and a limiting block (108); Electric rollers B (105) are rotatably arranged on both sides of the lower interior of the rotating bracket (104) via bearings, and a limiting groove (106) is embedded in the lower interior of the rotating bracket (104). Damping telescopic rods A (107) are fixedly installed on both sides of the lower interior wall of the loading frame (103) near the lower interior wall of the rotating bracket (104), and a spring is matchedly arranged on the outer side of the damping telescopic rod A (107). A limiting block (108) is fixedly installed above the end of the damping telescopic rod A (107), and the limiting block (108) is slidably arranged on the inner side of the limiting groove (106).

4. A quick loading mechanism for a steel coil reel as claimed in claim 1, characterized in that: The pressing mechanism is composed of a damping telescopic rod C (4) and a pressing plate (401); Damping telescopic rods C (4) are fixedly mounted on both sides below the sliding frame (201), and springs are matchedly arranged on the outside of the damping telescopic rods C (4), and a pressing plate (401) is fixedly mounted between the ends of the damping telescopic rods C (4).

5. A quick loading mechanism for a steel coil reel as claimed in claim 2, characterized in that: There are a plurality of teeth (204) which are arranged in parallel at equal distances. There are eight damping telescopic rods B (301), and every two of them are arranged in parallel at relatively equal distances and are centrally symmetrically arranged. The support frame (302) is arranged in an arc shape, and the side of the support frame (302) is arranged in an inclined shape.

6. A quick loading mechanism for a steel coil reel as claimed in claim 3, characterized in that: There are a plurality of limit grooves (106), which are arranged in a semicircular shape and are equidistantly arranged around the periphery.

7. A quick loading mechanism for a steel coil reel as claimed in claim 4, characterized in that: The pressing plate (401) is arranged in an arc shape, and the material of the pressing plate (401) is butadiene rubber.

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