A metal composite plate surface rust removal device and method for cutting machine tool manufacturing

Abstract

The present invention discloses a surface rust removal device for metal composite plates used in the manufacture of cutting machine tools, comprising a grinding bracket, wherein both sides of the grinding bracket are provided with bracket support columns distributed in a mirror image with each other, and a side grinding mechanism distributed in an array on one side of the grinding bracket, wherein the side grinding mechanism comprises a fixed chassis, a first transmission box is provided at the upper end of the fixed chassis, a grinding box body is provided on one side of the fixed chassis, a second transmission box is provided on the grinding box body, a second servo motor is provided on the second transmission box, a first rotating shaft distributed in an array is further provided in the grinding box body, a second gear is provided at the upper end of the first rotating shaft, a transmission mechanism is provided below the side grinding mechanism, and a front grinding mechanism distributed in an array is provided on the transmission mechanism. The present invention can simultaneously grind and remove rust from the side and front of a plate, has high rust removal efficiency, can carry out targeted rust removal for plates with stepped shapes, has strong practicality, and can perform assembly line rust removal, operates uninterruptedly, is simple to maintain, and is conducive to reducing the labor intensity of operators.

Description

Technical Field

[0001] The invention relates to the field of metal cutting machine tool manufacturing, in particular to a surface rust removal device for metal composite plates used in cutting machine tool manufacturing and a method thereof. Background Art

[0002] Metal cutting machine tools are one of the main equipment for processing various parts. Metal cutting machine tools also have very high requirements in the production and manufacturing process to ensure the accuracy of the later processing process. The materials used by metal cutting machine tools are mostly metal composite plates. In order to eliminate the internal stress of the metal composite plates, it is usually necessary to place the composite plates in the open air for adjustment to eliminate the stress. During the placement process, the metal composite plates will rust, affecting their normal use in the later stage. Rust removal is required after the internal stress is eliminated.

[0003] Rust removal is a method of removing rust from the metal surface using various means. Metal rust is metal oxide. It is a technology that uses chemical, electrochemical, mechanical and other methods to remove oxides from the surface of equipment and its components. Commonly used rust removal methods include chemical rust removal, electrochemical rust removal, sandblasting, manual rust removal and roller burnishing.

[0004] Chemical rust removal, also known as etching and pickling, uses an acidic solution (or alkaline solution) to react chemically with the rust layer on the metal surface to dissolve, peel off and remove the rust layer; electrochemical rust removal is divided into anodic rust removal and cathodic rust removal. The anodic rust removal method uses the electrochemical dissolution and chemical dissolution of the anode and the mechanical stripping effect of the rust layer when oxygen bubbles are precipitated to remove rust. Since the oxygen bubbles are large and scarce, the stripping effect is not strong, and the parts are prone to over-corrosion. The cathodic rust removal method uses the reduction reaction of hydrogen and the mechanical stripping effect of the rust layer when hydrogen bubbles are precipitated to remove rust. The hydrogen bubbles are dense and small, the stripping effect is strong, and it does not corrode the metal of the parts, but it is easy to cause hydrogen embrittlement and the deposition of impurities on the surface of the parts.

[0005] Sandblasting, also known as shot blasting, uses high-pressure fluid to spray abrasive directly onto the surface of a part, using the mechanical impact and scouring action of the abrasive to remove corrosion products and contaminants. Manual rust removal uses handheld and powered handheld tools to remove rust from the surface of a component through mechanical cutting. Tumble blasting involves placing the part, abrasive, and rust removal fluid into a rotating drum, which then rotates to remove rust from the surface. Rust removal is widely used in equipment maintenance, repair, and surface pretreatment.

[0006] The existing metal sheet production sometimes uses a composite method. In special cases, the sheet will have steps. In this case, it is extremely inconvenient to use shot blasting and chemical rust removal, and the manual rust removal method is labor-intensive. In response to this situation, a surface rust removal device and method for metal composite plates used in cutting machine tool manufacturing are proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a surface rust removal device and method for metal composite plates used in cutting machine tool manufacturing, which can simultaneously grind and remove rust on the side and front of the plate, have high rust removal efficiency, can carry out targeted rust removal on plates with stepped shapes, have strong practicality, and can perform assembly line rust removal, work uninterruptedly, and be simple to maintain, which is conducive to reducing the labor intensity of operators.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A surface rust removal device for metal composite plates used in cutting machine tool manufacturing comprises a grinding bracket, bracket support columns mirror-distributed on both sides of the grinding bracket, a side grinding mechanism array-distributed on one side of the grinding bracket, the side grinding mechanism comprising a fixed chassis, a screw mechanism slot provided in the fixed chassis, a first transmission box provided at the upper end of the fixed chassis, a first servo motor provided on the first transmission box, a threaded rod provided at the lower end of the first servo motor, a first bearing seat array-distributed on the threaded rod, the first bearing seat fixed in the screw mechanism slot, a grinding box body provided on one side of the fixed chassis, a screw structure matching the threaded rod provided on one side of the grinding box body, A second transmission box is provided, a second servo motor is provided on the second transmission box, a driving rod is provided at the lower end of the second servo motor, a first gear is provided at the lower end of the driving rod, a first rotating shaft distributed in an array is also provided in the grinding box body, a second gear is provided at the upper end of the first rotating shaft, the first gear and the second gear cooperate with each other, the lower end of the first rotating shaft provided in the grinding box body on one side is provided with a first grinding wheel distributed in an array, and the lower end of the first rotating shaft provided in the grinding box body on the other side is provided with a single first grinding wheel, a transmission mechanism is provided below the side grinding mechanism, an array-distributed front grinding mechanism is provided on the transmission mechanism, and an array-distributed first fixed base plate is provided at the lower end of the bracket support column.

[0010] Furthermore, the transmission mechanism includes a transmission frame, side fixing plates are provided on both sides of the transmission frame, the side fixing plates are provided with array-distributed rotating shaft holes, a second rotating shaft is provided in the rotating shaft holes, a second grinding wheel is provided at the upper end of the second rotating shaft, the second rotating shaft is externally connected to a driving source, and the side fixing plates are also provided with array-distributed fixed slot plates, a third rotating shaft is provided in the fixed slot plates, a roller is provided on the third rotating shaft, and a transmission belt is commonly provided on the roller.

[0011] Furthermore, first slide rails are provided between the side fixed plates in mirror-image distribution, support angle steels are provided in an array between the transmission racks, fixed support plates are provided at the tops of the transmission racks, sliding adjustment blocks are provided between the first slide rails, a screw slot is provided on one side of the sliding adjustment block, an adjustment screw is provided in the screw slot, a fixed nut is provided on the adjustment screw, one end of the adjustment screw is inserted into the support angle steel, and the position of the sliding adjustment block between the first slide rails is adjusted by selecting the adjustment screw.

[0012] Furthermore, both ends of the side fixing plate are provided with roller rod mounting frames that are distributed in a mirror image with each other, one side of the roller rod mounting frame is provided with an array-distributed adjustment groove, the adjustment groove is provided with mounting screws, the roller rod mounting frame is also provided with an array-distributed roller rod mounting groove, the roller rod mounting groove is provided with a fourth rotating shaft, the fourth rotating shaft is provided with a roller, the fourth rotating shaft is provided with a first roller, the first roller is also provided in the conveyor belt, a second roller is provided on the other side of the conveyor belt, a fifth rotating shaft is provided in the second roller, and the fifth rotating shaft is fixed to the side fixing plate through a second bearing seat.

[0013] Furthermore, the front grinding mechanism includes side fixing plates that are distributed in a mirror image with each other, a second fixed base plate is provided at the lower end of the side fixing plate, a first fixing screw is provided on the second fixed base plate, a second slide rail is provided on the inner side of the side fixing plate, the second slide rail is provided with a second fixing screw distributed in an array, a slider is provided on the second slide rail, a grinding roller plate is directly provided on the slider, a third fixing screw distributed in an array is provided on the slider, connecting plates are provided on both sides of the grinding roller plate, and the connecting plates are fixed to the slider by the third fixing screws.

[0014] Furthermore, the lower end of the grinding roller plate is provided with a grinding roller mounting frame distributed in an array, the upper end of the grinding roller mounting frame is provided with a fourth fixing screw distributed in an array, a mounting column is provided in the grinding roller mounting frame, the lower end of the mounting column is provided with an elastic end, a high-strength spring is provided on the elastic end, the grinding roller shaft is installed in the mounting groove provided in the elastic end, and a grinding roller is provided on the grinding roller shaft.

[0015] Furthermore, the side fixing plate is provided with a first adjustment plate, the first adjustment plate is provided with a first threaded hole, a second adjustment plate is provided on the connecting plate on one side, the second adjustment plate is provided with a second threaded hole, the first threaded hole and the second threaded hole are used to adjust the threaded rod together, the upper end of the adjustment threaded rod is provided with an adjustment dial, and the adjustment dial is provided with an adjustment handle.

[0016] Furthermore, the method for removing rust from the surface of the metal composite plate comprises the following steps:

[0017] Step 1: Place the metal composite plate on the conveyor belt and adjust the threaded rod so that the grinding roller is elastically pressed against the metal composite plate;

[0018] Step 2: Adjust the position of the grinding box so that the first grinding wheel is aligned with the groove on the side of the metal composite plate;

[0019] Step 3: Start each servo motor to move the metal composite plate.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention can simultaneously polish and remove rust from the sides and front of the plate, with high rust removal efficiency;

[0022] 2. The present invention is suitable for rust removal on stepped plates, has strong practicality, streamlined rust removal, and uninterrupted work;

[0023] 3. The present invention is easy to maintain and helps to reduce the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic structural diagram of a metal composite plate surface rust removal device for use in cutting machine tool manufacturing according to the present invention;

[0026] Figure 2 This is a schematic diagram of a surface rust removal device for metal composite plates used in cutting machine tool manufacturing according to the present invention;

[0027] Figure 3 It is a structural schematic diagram of the front grinding mechanism of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the front grinding mechanism of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a metal composite plate surface rust removal device for use in cutting machine tool manufacturing according to the present invention;

[0030] Figure 6 This is a partial structural diagram of a metal composite plate surface rust removal device for use in cutting machine tool manufacturing according to the present invention;

[0031] Figure 7 This is a side view of the structure of the metal composite plate surface rust removal equipment used in cutting machine tool manufacturing of the present invention;

[0032] Figure 8 This invention Figure 5 A in the middle is an enlarged structural diagram;

[0033] Figure 9 This invention Figure 5 The enlarged structural diagram at B in the middle;

[0034] Figure 10 This invention Figure 7 Enlarged structural diagram at point C in the middle. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] A surface rust removal device for metal composite plates used in cutting machine tool manufacturing includes a grinding bracket 1, such as Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 8 As shown, the grinding bracket 1 is provided with support columns 11 distributed in a mirror image on both sides, and a side grinding mechanism 2 is distributed in an array on one side of the grinding bracket 1. The side grinding mechanism 2 includes a fixed chassis 21, a screw mechanism groove 211 is provided in the fixed chassis 21, a first transmission box 22 is provided at the upper end of the fixed chassis 21, a first servo motor 23 is provided on the first transmission box 22, a threaded rod 231 is provided at the lower end of the first servo motor 23, a first bearing seat 232 distributed in an array is provided on the threaded rod 231, and the first bearing seat 232 is fixed in the screw mechanism groove 211, a grinding box body 24 is provided on one side of the fixed chassis 21, a screw structure matching the threaded rod 231 is provided on one side of the grinding box body 24, a second transmission box 251 is provided on the grinding box body 24, and the second transmission box 252 is provided on the second transmission box 251. A second servo motor 25 is provided on 51, a driving rod 252 is provided at the lower end of the second servo motor 25, a first gear 253 is provided at the lower end of the driving rod 252, and a first rotating shaft 26 distributed in an array is further provided in the grinding box 24, a second gear 261 is provided at the upper end of the first rotating shaft 26, the first gear 253 and the second gear 261 cooperate with each other, the lower end of the first rotating shaft 26 provided in the grinding box 24 on one side is provided with a first grinding wheel 262 distributed in an array, and the lower end of the first rotating shaft 26 provided in the grinding box 24 on the other side is provided with a single first grinding wheel 262, a transmission mechanism 3 is provided below the side grinding mechanism 2, and an array-distributed front grinding mechanism 4 is provided on the transmission mechanism 3, and an array-distributed first fixed base plate 12 is provided at the lower end of the bracket support column 11.

[0038] The transmission mechanism 3 includes a transmission frame 31, such as Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 10As shown, side fixing plates 32 are provided on both sides of the transmission frame 31, and the side fixing plates 32 are provided with array-distributed rotating shaft holes 321, and the rotating shaft holes 321 are each provided with a second rotating shaft 33, and the upper end of the second rotating shaft 33 is provided with a second grinding wheel 34, and the second rotating shaft 33 is externally connected to a driving source. The side fixing plates 32 are also provided with array-distributed fixed slot plates 323, and the fixed slot plates 323 are each provided with a third rotating shaft 324, and the third rotating shaft 324 is provided with a roller 325, and the roller 325 is commonly provided with a transmission belt 326.

[0039] The side fixing plates 32 are further provided with first slide rails 322 which are mirror images of each other. Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 10 As shown, an array of support angle steels 311 are provided between the transmission racks 31, a fixed support plate 312 is provided at the top of each transmission rack 31, a sliding adjustment block 35 is provided between the first slide rails 322, a screw slot 351 is provided on one side of the sliding adjustment block 35, an adjustment screw 352 is provided in the screw slot 351, a fixing nut 353 is provided on the adjustment screw 352, one end of the adjustment screw 352 is inserted into the support angle steel 311, and the position of the sliding adjustment block 35 between the first slide rails 322 is adjusted by selecting the adjustment screw 352.

[0040] Both ends of the side fixing plate 32 are provided with roller mounting brackets 36 which are mirror images of each other. Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 10 As shown, one side of the roller mounting frame 36 is provided with an array of adjustment slots 361, and the adjustment slots 361 are each provided with a mounting screw 362. The roller mounting frame 36 is also provided with an array of roller mounting slots 363, and the roller mounting slots 363 are each provided with a fourth rotating shaft 37, and the fourth rotating shaft 37 is each provided with a roller 371. A fourth rotating shaft 38 is provided at the center of the sliding adjustment block 35, and a first roller 381 is provided on the fourth rotating shaft 38. The first roller 381 is also set in the conveyor belt 326. A second roller 392 is provided on the other side of the conveyor belt 326, and a fifth rotating shaft 391 is provided in the second roller 392. The fifth rotating shaft 391 is fixed to the side fixing plate 32 through a second bearing seat 39.

[0041] The front grinding mechanism 4 includes side fixing plates 41 that are mirror-imaged to each other. Figure 1 、 Figure 3 、 Figure 4As shown, a second fixed base plate 411 is provided at the lower end of the side fixed plate 41, a first fixing screw 412 is provided on the second fixed base plate 411, a second slide rail 42 is provided on the inner side of the side fixed plate 41, a second fixing screw 423 distributed in an array is provided on the second slide rail 42, a slider 421 is provided on the second slide rail 42, a grinding roller plate 43 is directly provided on the slider 421, a third fixing screw 422 distributed in an array is provided on the slider 421, connecting plates 431 are provided on both sides of the grinding roller plate 43, and the connecting plates 431 are fixed to the slider 421 by the third fixing screw 422.

[0042] The lower end of the grinding roller plate 43 is provided with a grinding roller mounting frame 44 distributed in an array. Figure 1 、 Figure 3 、 Figure 4 As shown, the upper end of the grinding roller mounting frame 44 is provided with an array-distributed fourth fixing screw 441, the grinding roller mounting frame 44 is provided with a mounting column 45, the lower end of the mounting column 45 is provided with an elastic end 46, the elastic end 46 is provided with a high-strength spring 461, the grinding roller shaft 47 is installed in the mounting groove 462 provided in the elastic end 46, and the grinding roller 48 is provided on the grinding roller shaft 47.

[0043] A first adjusting plate 413 is provided on the side fixing plate 41. Figure 1 、 Figure 3 、 Figure 4 As shown, a first threaded hole 414 is provided on the first adjustment plate 413, a second adjustment plate 432 is provided on the connecting plate 431 on one side, a second threaded hole 433 is provided on the second adjustment plate 432, and a threaded rod 49 is adjusted together in the first threaded hole 414 and the second threaded hole 433. An adjustment dial 491 is provided on the upper end of the adjustment threaded rod 49, and an adjustment handle 492 is provided on the adjustment dial 491.

[0044] A method for removing rust from the surface of a metal composite plate comprises the following steps:

[0045] Step 1: Place the metal composite plate 5 on the conveyor belt 326 and adjust the threaded rod 49 so that the grinding roller 48 elastically presses against the metal composite plate 5;

[0046] Step 2: Adjust the position of the grinding box 24 so that the first grinding wheel 262 is aligned with the groove on the side of the metal composite plate 5;

[0047] Step 3: Start each servo motor to move the metal composite plate 5.

[0048] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A surface rust removal device for metal composite plates used in cutting machine tool manufacturing, comprising a grinding bracket (1), characterized in that: The grinding bracket (1) is provided with support columns (11) distributed in a mirror image on both sides, and a side grinding mechanism (2) is distributed in an array on one side of the grinding bracket (1). The side grinding mechanism (2) includes a fixed chassis (21), a screw mechanism groove (211) is provided in the fixed chassis (21), a first transmission box (22) is provided at the upper end of the fixed chassis (21), a first servo motor (23) is provided on the first transmission box (22), a threaded rod (231) is provided at the lower end of the first servo motor (23), a first bearing seat (232) distributed in an array is provided on the threaded rod (231), and the first bearing seat (232) is fixed in the screw mechanism groove (211), a grinding box (24) is provided on one side of the fixed chassis (21), a screw structure matching the threaded rod (231) is provided on one side of the grinding box (24), a second transmission box (251) is provided on the grinding box (24), and the second transmission box (251) is provided. 51) is provided with a second servo motor (25), a driving rod (252) is provided at the lower end of the second servo motor (25), a first gear (253) is provided at the lower end of the driving rod (252), a first rotating shaft (26) distributed in an array is further provided in the grinding box (24), a second gear (261) is provided at the upper end of the first rotating shaft (26), the first gear (253) and the second gear (261) cooperate with each other, a first rotating shaft (26) provided in the grinding box (24) on one side is provided with a first grinding wheel (262) distributed in an array at the lower end, and a single first grinding wheel (262) is provided at the lower end of the first rotating shaft (26) provided in the grinding box (24) on the other side, a transmission mechanism (3) is provided below the side grinding mechanism (2), a front grinding mechanism (4) distributed in an array is provided on the transmission mechanism (3), and a first fixed base plate (12) distributed in an array is provided at the lower end of the bracket support column (11); The transmission mechanism (3) includes a transmission frame (31), side fixing plates (32) are provided on both sides of the transmission frame (31), the side fixing plates (32) are provided with array-distributed rotating shaft holes (321), a second rotating shaft (33) is provided in the rotating shaft holes (321), a second grinding wheel (34) is provided at the upper end of the second rotating shaft (33), the second rotating shaft (33) is externally connected to a driving source, the side fixing plates (32) are further provided with array-distributed fixed slot plates (323), a third rotating shaft (324) is provided in the fixed slot plates (323), a roller (325) is provided on the third rotating shaft (324), and a transmission belt (326) is provided on the roller (325); The front grinding mechanism (4) comprises side fixing plates (41) that are arranged in mirror images of each other, a second fixing base plate (411) is provided at the lower end of the side fixing plate (41), a first fixing screw (412) is provided on the second fixing base plate (411), a second slide rail (42) is provided on the inner side of the side fixing plate (41), a second fixing screw (423) distributed in an array is provided on the second slide rail (42), a slider (421) is provided on the second slide rail (42), a grinding roller plate (43) is directly provided on the slider (421), a third fixing screw (422) distributed in an array is provided on the slider (421), connecting plates (431) are provided on both sides of the grinding roller plate (43), and the connecting plates (431) are fixed to the slider (421) via the third fixing screw (422).

2. The surface rust removal equipment for metal composite plates used in cutting machine tool manufacturing according to claim 1 is characterized in that: A first slide rail (322) is provided between the side fixing plates (32) and is distributed in a mirror image with each other. An array of support angle steels (311) is provided between the transmission racks (31). A fixed support plate (312) is provided at the top of each transmission rack (31). A sliding adjustment block (35) is provided between the first slide rails (322). A screw slot (351) is provided on one side of the sliding adjustment block (35). An adjusting screw (352) is provided in the screw slot (351). A fixing nut (353) is provided on the adjusting screw (352). One end of the adjusting screw (352) is inserted into the support angle steel (311). By selecting the adjusting screw (352), the position of the sliding adjustment block (35) between the first slide rails (322) is adjusted.

3. The surface rust removal equipment for metal composite plates used in cutting machine tool manufacturing according to claim 1 is characterized in that: Both ends of the side fixing plate (32) are provided with roller mounting frames (36) distributed in a mirror image with each other, one side of the roller mounting frame (36) is provided with an array of adjustment slots (361), and the adjustment slots (361) are provided with mounting screws (362). The roller mounting frame (36) is also provided with an array of roller mounting slots (363), and the roller mounting slots (363) are provided with fourth rotating shafts (37), and the fourth rotating shafts (37) are provided with rollers (371). A fourth rotating shaft (38) is provided at the center of the sliding adjustment block (35), and a first roller (381) is provided on the fourth rotating shaft (38). The first roller (381) is also provided in the conveyor belt (326), and a second roller (392) is provided on the other side of the conveyor belt (326). A fifth rotating shaft (391) is provided in the second roller (392), and the fifth rotating shaft (391) is fixed to the side fixing plate (32) through a second bearing seat (39).

4. The surface rust removal equipment for metal composite plates used in cutting machine tool manufacturing according to claim 3 is characterized in that: The lower end of the grinding roller plate (43) is provided with a grinding roller mounting frame (44) distributed in an array, the upper end of the grinding roller mounting frame (44) is provided with a fourth fixing screw (441) distributed in an array, a mounting column (45) is provided in the grinding roller mounting frame (44), the lower end of the mounting column (45) is provided with an elastic end (46), the elastic end (46) is provided with a high-strength spring (461), the grinding roller shaft (47) is installed in a mounting groove (462) provided in the elastic end (46), and the grinding roller (48) is provided on the grinding roller shaft (47).

5. The surface rust removal equipment for metal composite plates used in cutting machine tool manufacturing according to claim 4 is characterized in that: The side fixing plate (41) is provided with a first adjustment plate (413), and the first adjustment plate (413) is provided with a first threaded hole (414). A second adjustment plate (432) is provided on a connecting plate (431) on one side, and the second adjustment plate (432) is provided with a second threaded hole (433). An adjustment threaded rod (49) is provided in both the first threaded hole (414) and the second threaded hole (433). An adjustment dial (491) is provided at the upper end of the adjustment threaded rod (49), and an adjustment handle (492) is provided on the adjustment dial (491).

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