Derusting machine for steel wire production

Abstract

The invention relates to the technical field of steel wire rust removal, in particular to a rust remover for steel wire production, which comprises a box body, a plurality of roller skating mechanisms are mounted at the top end of the box body, and a rotary scraping mechanism, a drying mechanism, a pressing mechanism and a smearing mechanism are respectively arranged on the box body; the rotary scraping mechanism comprises fixing frames symmetrically and fixedly connected to one side of the top end of the box body, an annular cylinder is fixedly connected between the two fixing frames, a rotating ring is rotatably connected to the inner wall of the annular cylinder, a fixing ring is fixedly connected to one end of the rotating ring, and guide columns are symmetrically and fixedly connected to the inner wall of the fixing ring; the outer walls of the two sets of guide columns are slidably connected with limiting blocks. Dust and dirt attached to the outer surface of the alloy steel wire can be scraped off in the pulling process of the alloy steel wire, flushing is conducted, the alloy steel wire can be completely exposed outside, and therefore rust on the alloy steel wire can fully react with a rust remover, and the rust removing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire rust removal, in particular to a rust removal machine for steel wire production. Background Art

[0002] The main raw material of alloy steel wire is alloy steel wire rod. Alloy steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements (such as chromium, nickel, cobalt, molybdenum, aluminum, titanium, etc.) to ordinary carbon steel. It has high strength and durability, so it is widely used in many different fields. After production, alloy steel wire will form rust on the outer surface after being placed for a long time, so it needs to be derusted in order to better cope with harsh environmental conditions.

[0003] At present, in the prior art, if the alloy steel wire is left to stand for a long time after production, dust or dirt is easily accumulated on its surface. If the rusted area on the surface of the alloy steel wire is covered with dust or dirt, it will hinder the effective contact of the rust remover, thereby affecting the chemical reaction between the rust remover and the rust, thereby reducing the rust removal effect.

[0004] In addition, the rust removal process of alloy steel wire usually involves placing it in a container containing an acidic rust remover and allowing the alloy steel wire to react with the rust remover. When the alloy steel wire is placed in a box, it will be stacked. There may be contact surfaces between the stacked alloy steel wires that are not fully wetted by the acidic rust remover, which will result in unsatisfactory rust removal effects and residual rust on the surface of the alloy steel wire, thereby affecting its subsequent application. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a rust remover for steel wire production.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a rust remover for steel wire production, comprising a box body, a plurality of roller sliding mechanisms are installed on the top of the box body, and a rotating scraping mechanism, a drying mechanism, a pressing mechanism and a coating mechanism are respectively arranged on the box body;

[0007] The rotary scraping mechanism comprises a fixing frame symmetrically fixedly connected to one side of the top end of the box body, an annular cylinder is fixedly connected between the two fixing frames, a rotating ring is rotatably connected to the inner wall of the annular cylinder, a fixing ring is fixedly connected to one end of the rotating ring, a guide column is symmetrically fixedly connected to the inner wall of the fixing ring, and the outer walls of the two groups of guide columns are slidably connected to limit blocks, and the two limit blocks are provided with triangular notches for contacting the outer wall of the alloy steel wire at one end close to each other, and the two triangular notches are used to scrape off dust or dirt attached to the outer wall of the alloy steel wire;

[0008] The rotary scraping mechanism also includes a threaded rod with threads passing through both sides of the outer wall of the fixed ring, the two threaded rods are rotatably connected to the two limit blocks, the rotation of the threaded rod is used to adjust the intersection size between the triangular notches, the two threaded rods are fixedly connected with a circular block at one end away from each other, a limiting groove is provided on one side of the outer wall of the two circular blocks, and a sliding groove is provided on one side of the outer wall of the fixed ring corresponding to the circular block, and the inner walls of the two sliding grooves are slidably connected with moving blocks, springs are fixedly connected between the two groups of moving blocks and the sliding grooves, and the other ends of the two moving blocks are slidably connected with a limiting rod that matches the shape of the limiting groove, and the limiting rod is inserted into the limiting groove to complete the limiting operation of the threaded rod.

[0009] Preferably, the rotating scraping mechanism also includes a fixed block fixedly connected to the top of the annular cylinder, one end of the fixed block is fixedly connected to a motor, the motor driving end is fixedly connected to a driving shaft, the other end of the driving shaft is fixedly connected to a gear, the outer diameter of the gear is meshingly connected to an external gear ring, and the external gear ring and the rotating ring are fixedly connected.

[0010] Preferably, the rotary scraping mechanism further comprises a nozzle symmetrically fixedly connected to the inner wall of the rotating ring, a water pump is fixedly connected to the top of the fixing frame on one side, and the water pump and the annular cylinder are connected via a pipeline.

[0011] Preferably, two baffles are fixedly connected to the inner wall of the box body and are divided into three storage chambers, and the three storage chambers store clean water, acidic rust remover and clean water in sequence, respectively, and the first storage chamber is connected to the water pump through a pipeline.

[0012] Preferably, the pressing mechanism includes a column fixedly connected to the top of the box body, and the number of the columns is set to four. The tops of the four columns are fixedly connected to top plates, and the top of the top plate is fixedly penetrated by a hydraulic rod, and the telescopic end of the hydraulic rod is fixedly connected to a lifting plate, and the top of the lifting plate is fixedly connected to guide rods on both sides of the hydraulic rod corresponding to the top and penetrating the top plate.

[0013] Preferably, connecting plates are symmetrically fixedly connected to both sides of the bottom end of the lifting plate, a rotating shaft is fixedly connected between the two connecting plates, and lower pressure rollers are rotatably connected to the outer walls of the two rotating shafts.

[0014] Preferably, the drying mechanism includes a first drying box fixedly connected between the fixed frames, and a second drying box fixedly connected to one end of the box body, a hot air blower is fixedly connected to the top of the top plate, and the second drying box, the first drying box and the hot air blower are connected by a pipeline.

[0015] Preferably, the coating mechanism comprises a storage box fixedly connected to one end of the second drying box, and a coating sponge for coating the rust inhibitor is fixedly connected to the inner wall of the storage box.

[0016] Preferably, an electric push rod is fixedly passed through the bottom end of the storage box, and a lifting plate is fixedly connected to the telescopic end of the electric push rod, and the lifting plate and the inner wall of the storage box are matched in shape.

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

[0018] 1. First, by setting the rotating scraping mechanism, the triangular notch can contact the outer surface of the alloy steel wire, so it can be applied to alloy steel wires of different thicknesses, thereby improving the practicability of the device, and the fixed ring can be rotated, so that the dust and dirt attached to the outer surface of the alloy steel wire can be scraped off during the pulling process of the alloy steel wire. At the same time, the water sprayed from the nozzle can be used to flush the alloy steel wire again, so that the alloy steel wire can be completely exposed outside, so that the rust on the alloy steel wire and the rust remover can fully react, thereby improving the rust removal effect;

[0019] 2. Through the setting of the drying mechanism, the alloy steel wire can be dried in the first drying box after being rinsed, so as to prevent the rinsing water from being brought into the rust remover and avoid affecting the concentration of the rust remover. In addition, the alloy steel wire that has been in contact with the rust remover and washed can be dried again in the second drying box to ensure the subsequent coating effect;

[0020] 3. Through the setting of the downward pressure mechanism, the rust on the alloy steel wire and the rust remover can fully contact and react, so that the rusted part of the alloy steel wire can be cleaned, and the rust remover on the alloy steel wire can be washed off with clean water afterwards, which is convenient for subsequent operations;

[0021] 4. Through the setting of the coating mechanism, the outer wall of the alloy steel wire passing through the second drying box can be coated with rust inhibitor, so as to prevent the alloy steel wire from rusting and extend the service life. After coating for a period of time, the lifting plate can be pushed up by the electric push rod to ensure that there is sufficient rust inhibitor on the coating sponge, so continuous coating can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of a rust remover for steel wire production according to the present invention;

[0023] Figure 2 The present invention is a rust remover for steel wire production Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 It is a side view from another perspective of a rust remover for steel wire production of the present invention;

[0025] Figure 4 It is a cross-sectional view of an annular cylinder and a rotating ring of a rust remover for steel wire production according to the present invention;

[0026] Figure 5 The present invention is a rust remover for steel wire production Figure 4 Enlarged view of point B in the middle;

[0027] Figure 6 This is a diagram showing the internal structure of a fixing ring of a rust remover for steel wire production according to the present invention;

[0028] Figure 7 This is a partial structural exploded view of a rust remover for steel wire production according to the present invention;

[0029] Figure 8 This is a diagram showing a pressing mechanism of a rust remover for steel wire production according to the present invention;

[0030] Fig. 9 The present invention is a cross-sectional view of a storage box and a second drying box of a rust remover for steel wire production.

[0031] In the figure: 1. box body; 2. roller skating mechanism; 3. first drying box; 4. lower pressure roller; 5. top plate; 6. guide rod; 7. hydraulic rod; 8. hot air blower; 9. second drying box; 10. connecting plate; 11. baffle; 12. column; 13. fixed frame; 14. annular cylinder; 15. water pump; 16. motor; 17. fixed block; 18. gear; 19. driving shaft; 20. circular block; 21. moving block; 22. threaded rod; 23. fixed ring; 24. lifting plate; 25. storage box; 26. electric push rod; 27. outer gear ring; 28. nozzle; 29. ​​rotating ring; 30. limit rod; 31. slide groove; 32. spring; 33. guide column; 35. limit block; 36. triangular notch; 37. limit groove; 38. rotating shaft; 39. smear sponge; 40. lifting plate. DETAILED DESCRIPTION

[0032] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0033] like Figure 1-Figure 9The rust remover for steel wire production shown in the figure comprises a box body 1, a plurality of roller skating mechanisms 2 are installed on the top of the box body 1, and a rotating scraping mechanism, a drying mechanism, a pressing mechanism and a coating mechanism are respectively arranged on the box body 1. The roller skating mechanism 2 can make the alloy steel wire slide smoothly to avoid the wear of the alloy steel wire during the rust removal process. The setting of the rotating scraping mechanism can clean the dust or dirt on the outer surface of the alloy steel wire. The setting of the drying mechanism can perform drying operation after rinsing or washing to avoid affecting the subsequent operation. The pressing mechanism can press the alloy steel wire into the rust remover so that the rust remover and the rust on the alloy steel wire can fully contact and react. The setting of the coating mechanism can apply rust inhibitor to the alloy steel wire after rust removal to extend the service life.

[0034] like Figure 2 , Figure 4 , Figure 6 As shown, the rotary scraping mechanism includes a fixing frame 13 symmetrically fixedly connected to one side of the top of the box body 1, the two fixing frames 13 are L-shaped, an annular cylinder 14 is fixedly connected between the two fixing frames 13, the inner wall of the annular cylinder 14 is rotatably connected to a rotating ring 29, one end of the rotating ring 29 is fixedly connected to a fixing ring 23, the inner wall of the fixing ring 23 is symmetrically fixedly connected to a guide column 33, the outer walls of the two groups of guide columns 33 are both slidably connected to limit blocks 35, and the two limit blocks 35 are both provided with a triangular notch 36 for contacting the outer wall of the alloy steel wire at one end close to each other, and the two triangular notches 36 are used to scrape off dust or dirt attached to the outer wall of the alloy steel wire;

[0035] like Figure 5-Figure 7 As shown, the rotary scraping mechanism also includes a threaded rod 22 with threads passing through both sides of the outer wall of the fixed ring 23, the two threaded rods 22 are rotatably connected to the two limit blocks 35, and the rotation of the threaded rod 22 is used to adjust the cross size between the triangular notches 36, and the two threaded rods 22 are fixedly connected with a circular block 20 at one end away from each other, and a limit groove 37 is provided on one side of the outer wall of the two circular blocks 20, and a sliding groove 31 is provided on one side of the outer wall of the fixed ring 23 corresponding to the circular block 20, and the inner walls of the two sliding grooves 31 are slidably connected with moving blocks 21, and springs 32 are fixedly connected between the two groups of moving blocks 21 and the sliding grooves 31, and the other ends of the two moving blocks 21 are slidably connected with a limit rod 30 that matches the shape of the limit groove 37, and the limit rod 30 is inserted into the limit groove 37 to complete the limiting operation of the threaded rod 22.

[0036] like Figure 2 , Figure 4As shown, the rotary scraping mechanism also includes a fixed block 17 fixedly connected to the top of the annular cylinder 14, one end of the fixed block 17 is fixedly connected to the motor 16, the driving end of the motor 16 is fixedly connected to the driving shaft 19, the other end of the driving shaft 19 is fixedly connected to the gear 18, the outer diameter of the gear 18 is meshed and connected to the outer gear ring 27, and the outer gear ring 27 is fixedly connected to the rotating ring 29. The motor 16 is limited and fixed by the fixed block 17, when the motor 16 starts to rotate with the driving shaft 19, so that the gear 18 rotates, and after the gear 18 rotates, the outer gear ring 27 rotates, so that the rotating ring 29 can be rotated, and the rotating ring 29 rotates with the fixed ring 23, so the outer surface of the alloy steel wire can be thoroughly cleaned and the cleaning effect is guaranteed.

[0037] like Figure 2-Figure 4 As shown, the rotary scraping mechanism also includes a nozzle 28 symmetrically fixedly connected to the inner wall of the rotating ring 29, and a water pump 15 is fixedly connected to the top of the fixed frame 13 on one side, and the water pump 15 and the annular cylinder 14 are connected through a pipeline. The clean water in the first storage cavity is pumped into the cavity between the rotating ring 29 and the annular cylinder 14 by the water pump 15, and then sprayed out through the nozzle 28, so that the alloy steel wire can be rinsed to ensure that the outer surface of the alloy steel wire is clean and tidy.

[0038] like Figure 1 , Figure 3 As shown, the inner wall of the box body 1 is fixedly connected with two baffles 11 and divided into three storage chambers, and the three storage chambers store clean water, acidic rust remover and clean water respectively in sequence, and the first storage chamber is connected to the water pump 15 through a pipeline. Clean water is placed in the first storage chamber, acidic rust remover is placed in the second storage chamber, and clean water is placed in the third storage chamber. The rust on the alloy steel wire is removed by the acidic rust remover.

[0039] like Figure 1 , Figure 3 , Figure 8 As shown, the pressing mechanism includes a column 12 fixedly connected to the top of the box body 1, and the number of the columns 12 is set to four. The top of the four columns 12 is fixedly connected to the top of the top plate 5, and the top of the top plate 5 is fixedly penetrated by a hydraulic rod 7, and the telescopic end of the hydraulic rod 7 is fixedly connected to a lifting plate 24, and the top of the lifting plate 24 corresponds to the two sides of the hydraulic rod 7. The guide rod 6 is fixedly connected and penetrates the top plate 5. The top plate 5 is fixed by the column 12, and the lifting plate 24 is lifted and lowered by the hydraulic rod 7, and is guided by the guide rod 6 to move up and down stably.

[0040] like Figure 8As shown, the two sides of the bottom of the lifting plate 24 are symmetrically fixedly connected with connecting plates 10, the two connecting plates 10 are fixedly connected with a rotating shaft 38, and the outer walls of the two rotating shafts 38 are rotatably connected with the lower pressing roller 4. The connecting plates 10 on both sides are respectively arranged above the second storage chamber and the third storage chamber. At this time, the lifting plate 24 moves down and moves down with the connecting plate 10, thereby moving down with the rotating shaft 38 and the lower pressing roller 4, so that the alloy steel wire is immersed in the acidic rust remover and reacts with the rust. After the reaction treatment, the alloy steel wire enters the third storage chamber, and the acidic rust remover on the alloy steel wire is cleaned by the clean water in the third storage chamber.

[0041] like Figure 1 , Figure 3 , Fig. 9 As shown, the drying mechanism includes a first drying box 3 fixedly connected between the fixing frames 13, and a second drying box 9 fixedly connected to one end of the box body 1, a hot air blower 8 fixedly connected to the top of the top plate 5, and the second drying box 9, the first drying box 3 and the hot air blower 8 are connected through a pipeline. The first drying box 3 can be used to dry the alloy steel wire after washing dirt or dust to prevent water from entering the acidic rust remover and avoiding affecting the concentration of the acidic rust remover, while the second drying box 9 can be used to dry the alloy steel wire after washing the acidic rust remover, which is convenient for subsequent coating operations.

[0042] like Fig. 9 As shown, the coating mechanism includes a storage box 25 fixedly connected to one end of the second drying box 9, a coating sponge 39 for coating the rust preventive is fixedly connected to the inner wall of the storage box 25, an electric push rod 26 is fixedly passed through the bottom end of the storage box 25, and a lifting plate 40 is fixedly connected to the telescopic end of the electric push rod 26, and the lifting plate 40 is matched with the inner wall of the storage box 25. The rust preventive is coated on the outer surface of the alloy steel wire by the coating sponge 39, thereby extending the service life of the alloy steel wire, and then the electric push rod 26 is started to rise with the lifting plate 40, so as to ensure the amount of rust preventive in the coating sponge 39, so that the coating operation can be continued.

[0043] Working principle: First, the circular block 20 is rotated and the threaded rod 22 is rotated. The thread effect of the threaded rod 22 can move the limit block 35 and make the triangular notch 36 contact the outer surface of the alloy steel wire. At this time, the elasticity of the spring 32 makes the moving block 21 move toward the circular block 20, and the limit rod 30 is inserted into the limit groove 37 to complete the limit of the circular block 20. Therefore, it can contact the alloy steel wires of different thicknesses and process the dust and dirt on the outer surface to improve practicality. At this time, the starting motor 16 drives the drive shaft 19 and the gear 1 8 rotates, so it can rotate with the outer gear ring 27 and the rotating ring 29, thereby rotating with the fixed ring 23, and then rotating with the limit block 35, and scraping the pulled alloy steel wire through the triangular notch 36 to ensure thorough cleaning. At the same time, start the water pump 15 to pump the clean water in the first storage chamber into the cavity between the annular cylinder 14 and the rotating ring 29, and then spray it out through the nozzle 28 and spray the alloy steel wire, so that the cleaning operation can be performed again, and the alloy steel wire and the acidic rust remover can fully react to ensure the rust removal effect;

[0044] Furthermore, after rust removal, the alloy steel wire is dried in the first drying box 3 to prevent moisture on the alloy steel wire from entering the acidic rust remover, affecting the concentration of the acidic rust remover, and avoiding affecting the subsequent reaction rust removal operation;

[0045] Furthermore, the hydraulic rod 7 is started to move the lifting plate 24 downward, and is guided by the guide rod 6. When the lifting plate 24 moves downward, it moves the connecting plate 10 and the rotating shaft 38 downward, and the lower pressure roller 4 is brought into contact with the alloy steel wire, so that the alloy steel wire enters the second storage box and the third storage chamber, and the acidic rust remover is fully reacted with the rust on the alloy steel wire to complete the rust removal operation. After the acidic rust remover is cleaned, the alloy steel wire is dried again by the second drying box 9, and a layer of rust inhibitor is applied to the outer surface of the alloy steel wire by the sponge 39 to extend the service life of the alloy steel wire. Similarly, the electric push rod 26 can be started to move the lifting plate 40 upward, and a sufficient amount of the sponge 39 can be ensured so that the coating operation can be carried out continuously.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A rust remover for steel wire production, comprising a box (1), a plurality of roller sled mechanisms (2) being mounted on the top of the box (1), characterized in that: The box body (1) is respectively provided with a rotating scraping mechanism, a drying mechanism, a pressing mechanism and a coating mechanism; The rotary scraping mechanism comprises a fixing frame (13) symmetrically fixedly connected to one side of the top end of the box body (1), an annular cylinder (14) fixedly connected between the two fixing frames (13), a rotating ring (29) rotatably connected to the inner wall of the annular cylinder (14), one end of the rotating ring (29) fixedly connected to the fixing ring (23), the inner wall of the fixing ring (23) symmetrically fixedly connected to the guide column (33), the outer walls of the two groups of the guide columns (33) are both slidably connected to limit blocks (35), and the two limit blocks (35) are each provided with a triangular notch (36) at one end close to each other for contacting the outer wall of the alloy steel wire, and the two triangular notches (36) are used to scrape off dust or dirt attached to the outer wall of the alloy steel wire; The rotary scraping mechanism further comprises a threaded rod (22) threadedly penetrating two sides of the outer wall of the fixing ring (23); the two threaded rods (22) are rotatably connected to two limit blocks (35); the rotation of the threaded rod (22) is used to adjust the cross size between the triangular notches (36); the two threaded rods (22) are fixedly connected to a circular block (20) at one end away from each other; a limit groove (37) is provided on one side of the outer wall of the two circular blocks (20); the fixing ring (23) A slide groove (31) is provided on one side of the circular block (20) on both sides of the outer wall, and the inner walls of the two slide grooves (31) are slidably connected with a moving block (21), and a spring (32) is fixedly connected between the two groups of the moving blocks (21) and the slide grooves (31). The other ends of the two moving blocks (21) are slidably connected with a limiting rod (30) whose shape matches the limiting groove (37), and the limiting rod (30) is inserted into the limiting groove (37) to complete the limiting operation of the threaded rod (22).

2. A rust remover for steel wire production according to claim 1, characterized in that: The rotary scraping mechanism further comprises a fixed block (17) fixedly connected to the top end of the annular cylinder (14); one end of the fixed block (17) is fixedly connected to a motor (16); a driving end of the motor (16) is fixedly connected to a driving shaft (19); the other end of the driving shaft (19) is fixedly connected to a gear (18); the outer diameter of the gear (18) is meshingly connected to an outer gear ring (27); and the outer gear ring (27) and the rotating ring (29) are fixedly connected.

3. A rust remover for steel wire production according to claim 2, characterized in that: The rotary scraping mechanism further comprises a nozzle (28) symmetrically fixedly connected to the inner wall of the rotating ring (29); a water pump (15) is fixedly connected to the top of the fixing frame (13) on one side; the water pump (15) and the annular cylinder (14) are connected via a pipeline.

4. A rust remover for steel wire production according to claim 3, characterized in that: The inner wall of the box body (1) is fixedly connected to two baffles (11) and is divided into three storage chambers. The three storage chambers store clean water, acidic rust remover and clean water respectively in sequence. The first storage chamber is connected to the water pump (15) via a pipeline.

5. The rust remover for steel wire production according to claim 1, characterized in that: The pressing mechanism comprises a column (12) fixedly connected to the top of the box body (1), the number of the columns (12) being four, the tops of the four columns (12) being fixedly connected to a top plate (5), the top of the top plate (5) being fixedly penetrated by a hydraulic rod (7), the telescopic end of the hydraulic rod (7) being fixedly connected to a lifting plate (24), and the top of the lifting plate (24) corresponding to both sides of the hydraulic rod (7) being fixedly connected to guide rods (6) which penetrate the top plate (5).

6. A rust remover for steel wire production according to claim 5, characterized in that: Both sides of the bottom end of the lifting plate (24) are symmetrically and fixedly connected to connecting plates (10), a rotating shaft (38) is fixedly connected between the two connecting plates (10), and the outer walls of the two rotating shafts (38) are rotatably connected to lower pressure rollers (4).

7. A rust remover for steel wire production according to claim 5, characterized in that: The drying mechanism comprises a first drying box (3) fixedly connected between the fixing frames (13), and a second drying box (9) fixedly connected to one end of the box body (1); a hot air blower (8) is fixedly connected to the top of the top plate (5); and the second drying box (9), the first drying box (3) and the hot air blower (8) are connected via a pipeline.

8. A rust remover for steel wire production according to claim 7, characterized in that: The coating mechanism comprises a storage box (25) fixedly connected to one end of the second drying box (9), and a coating sponge (39) for coating the rust inhibitor is fixedly connected to the inner wall of the storage box (25).

9. A rust remover for steel wire production according to claim 8, characterized in that: An electric push rod (26) is fixedly inserted through the bottom end of the storage box (25), and a lifting plate (40) is fixedly connected to the telescopic end of the electric push rod (26), and the lifting plate (40) and the inner wall of the storage box (25) are matched in shape.

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