Metal plate phosphating suspension type feeding device

Abstract

The invention discloses a metal plate phosphating suspension type feeding device, and relates to the technical field of conveying, the metal plate phosphating suspension type feeding device comprises a guide rail and a sliding seat movably matched with the guide rail, a rigid frame is mounted at the bottom of the sliding seat, a horizontal rod is mounted at the bottom end of the rigid frame, and two suspension units are mounted on the bottom surface of the horizontal rod; the suspension unit comprises a first shaft which cannot rotate relative to the horizontal rod and a second shaft which is movably matched with the horizontal rod. When metal plates are immersed in the phosphating pool to be conveyed, two adjacent plates hung on the first shaft are always kept parallel to each other and are in a static state relative to the horizontal rod, and the plate hung on the second shaft located between the two plates swings around the vertical axis in a reciprocating mode. According to the plate phosphating device, the phosphating solution between the adjacent plates can flow, so that the phosphating solution between the adjacent plates can be exchanged with the other part of phosphating solution in the phosphating pool, and the phosphating degree of the surfaces of the plates is consistent.

Description

Technical Field

[0001] The invention relates to the technical field of conveying, in particular to a metal plate phosphating treatment hanging type feeding device. Background Art

[0002] Phosphating treatment refers to the process of treating metal workpieces with an acid solution containing dihydrogen phosphate to generate an insoluble phosphate film with a thickness of about 1-10 microns. Its core purpose is to improve the corrosion resistance of the plate, enhance the adhesion of the coating, and improve the subsequent processing performance through the phosphate film. Phosphating treatment usually stores the solution in a phosphating tank, and feeds the plate into the phosphating tank through a feeding device for immersion.

[0003] The Chinese utility model patent with publication number CN216037228U discloses a phosphating pool feeding device, including a phosphating treatment pool, a left support frame, a right support frame, a slide plate, a clamping device and a driving cylinder. The left support frame is arranged on the left side of the phosphating treatment pool, the right support frame is arranged on the right side of the phosphating treatment pool, the slide plate is movably connected to the left support frame, the slide plate is movably connected to the right support frame, the clamping device is arranged above the slide plate, and the driving cylinder is fixedly connected to the left support frame.

[0004] A Chinese utility model patent with publication number CN220948085U discloses a feeding device for phosphating steel pipes, which relates to the field of production and processing technology, and includes a main body, a limiter and a moving structure; two groups of evenly arranged universal wheels are provided at the bottom of one side of the main body, and an auxiliary groove is opened inside the main body; the limiter is inserted into the auxiliary groove; the moving structure is provided on the left side of the main body, and the right end of the moving member of the moving structure is in contact with the left end of the main body.

[0005] During the actual phosphating treatment, after all the plates are immersed in the phosphating pool, each plate moves synchronously along a predetermined path, the solution flows relative to the plate, and the solution flow rate at each edge of the plate is basically the same, which makes it difficult for the solution between adjacent plates to exchange with the external solution. In this way, only the surface of the first plate can be fully phosphated, while the surface of the remaining plates is insufficiently phosphated. At present, there is a solution in the industry, which is to set the suspension rod of the suspended plate to a rotatable form. After the plate is immersed in the solution, the plate is driven to rotate continuously by external force to increase the contact degree between the surface of each plate and the solution. Although this method is feasible, it will greatly increase the resistance of the solution to the plate, and the required energy consumption is very high. In this way, how to improve the contact effect between the solution and the plate to improve the phosphating effect without significantly increasing the resistance of the solution to the plate is a problem that technicians in this field need to solve. Summary of the invention

[0006] The object of the present invention is to provide a hanging feeding device for phosphating treatment of metal sheets to solve the above deficiencies in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solution: A hanging feeding device for phosphating treatment of metal sheets, including a guide rail and a sliding seat movably matched with the guide rail. A rigid frame is installed at the bottom of the sliding seat, a horizontal rod is installed at the bottom end of the rigid frame, and two groups of hanging units are installed on the bottom surface of the horizontal rod. The hanging unit includes a first shaft that cannot rotate relative to the horizontal rod and a second shaft that is movably matched with the horizontal rod.

[0008] The axes of the first shaft and the second shaft are both in the vertical state, and the first shaft and the second shaft are arranged at equal intervals. Hooks are installed at the bottom ends of the first shaft and the second shaft; the second shaft has a first state and a second state. In the first state of the second shaft, the sheets hung by each hook are parallel to each other; in the second state of the second shaft, the sheets hung by adjacent hooks are not parallel.

[0009] As a preferred technical solution of the present invention, a gear coaxial with the second shaft is sleeved on the second shaft. The horizontal rod is of a hollow structure, and a sliding plate is slidably installed horizontally inside the horizontal rod. Transmission teeth cooperating with the gear are fixedly installed at positions corresponding to the gear on the sliding plate.

[0010] As a preferred technical solution of the present invention, a convex block is fixedly installed on the sliding plate, and two limiting blocks corresponding to the position of the convex block are fixedly installed on the inner wall of the horizontal rod; a horizontal spiral spring is fixedly connected between the sliding plate and the inner wall of the horizontal rod.

[0011] As a preferred technical solution of the present invention, a lifting rod is slidably installed vertically at the end of the horizontal rod, and a stainless steel shell is fixedly installed at the bottom end of the lifting rod; a push-pull rod is fixedly installed at the end of the sliding plate, a roller is installed at one end of the push-pull rod, and an arc-shaped plate that fits with the roller is fixedly installed on the lifting rod.

[0012] As a preferred technical solution of the present invention, a ball is installed on the horizontal rod and cooperates with the second shaft.

[0013] As a preferred technical solution of the present invention, a positioning groove is opened at the top of the hook, and accommodation grooves are opened inside the first shaft and the second shaft. A positioning pin that cooperates with the positioning groove is movably installed in the accommodation groove.

[0014] As a preferred technical solution of the present invention, the second shaft and the gear are slidably matched in the vertical direction. A horizontal first cylindrical block is installed on the positioning pin, and control plates are slidably installed horizontally on the first shaft and the second shaft. First inclined grooves cooperating with the first cylindrical block are opened on the control plates.

[0015] As a preferred technical solution of the present invention, semi-circular plates coaxial with the second shafts are rotatably installed at the positions of the bottom surface of the horizontal rod corresponding to each second shaft. The lower surface of the semi-circular plate is installed with a second cylindrical block parallel to the first cylindrical block through a rigid rod, and a second inclined groove cooperating with the second cylindrical block is opened on the control plate of the second shaft.

[0016] As a preferred technical solution of the present invention, a second cylindrical block parallel to the first cylindrical block is installed at the position of the bottom surface of the horizontal rod corresponding to each first shaft through a rigid rod, and a second inclined groove cooperating with the second cylindrical block is opened on the control plate of the first shaft.

[0017] As a preferred technical solution of the present invention, the first cylindrical block is rotatably matched with the positioning pin, and the second cylindrical block is rotatably matched with the rigid rod.

[0018] In the above technical solution, for the metal sheet phosphating treatment hanging feeding device provided by the present invention, when the metal sheet is immersed and conveyed in the phosphating tank, the sheets suspended by two adjacent first shafts always remain parallel to each other and stationary relative to the horizontal rod, while the sheet suspended by the second shaft located between these two sheets swings reciprocally around the vertical axis, so that the phosphating liquid between adjacent sheets can flow, enabling the phosphating liquid between adjacent sheets to exchange with the phosphating liquid in the rest of the phosphating tank, thereby ensuring that the phosphating degree of the surfaces of each sheet is consistent. It should be noted that in the present invention, only the sheet suspended by the second shaft swings by a certain amplitude. Compared with the traditional method of driving each sheet to rotate continuously, the resistance of the sheet from the phosphating liquid is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0020] Figure 1 It is the first three-dimensional view of the metal sheet phosphating treatment feeding device in Embodiment 1;

[0021] Figure 2 It is the second three-dimensional view of the metal sheet phosphating treatment feeding device in Embodiment 1;

[0022] Figure 3 For Figure 2 the enlarged schematic view at A in

[0023] Figure 4 It is the state schematic diagram of the metal sheet during the working process in Embodiment 1;

[0024] Figure 5 Schematic diagram of partial internal structure of the horizontal rod in Embodiment 2;

[0025] Figure 6 Schematic diagram of partial structure of the suspension unit in Embodiment 3.

[0026] Description of the reference numerals:

[0027] 1. Guide rail; 2. Sliding seat; 3. Rigid frame; 4. Horizontal rod; 5. Suspension unit; 501. First shaft; 502. Second shaft; 503. Hook; 504. Positioning groove; 505. Accommodating groove; 506. Positioning pin; 507. First cylindrical block; 508. Control board; 509. First inclined groove; 510. Semi-circular plate; 511. Second cylindrical block; 512. Second inclined groove; 6. Gear; 7. Slide plate; 8. Driving tooth; 9. Convex block; 10. Limiting block; 11. Helical spring; 12. Lifting rod; 13. Stainless steel housing; 14. Push-pull rod; 15. Roller; 16. Arc plate. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0029] Embodiment 1

[0030] As Figure 1 , Figure 2 and Figure 3 shown, this embodiment provides a suspension type feeding device for phosphating treatment of metal sheets, which is used for suspending and transporting a plurality of metal sheets, and immersing the metal sheets in a phosphating tank for phosphating treatment during transportation. Specifically, it includes a guide rail 1 and a sliding seat 2 that is movably matched with the guide rail 1. The guide rail 1 is composed of multiple sections and has a height difference. The guide rail 1 passes above the phosphating tank. A conveying chain is installed in the guide rail 1, and the sliding seat 2 is connected to the conveying chain. When the conveying chain moves, it will drive the sliding seat 2 to move along the guide rail 1. A rigid frame 3 is installed at the bottom of the sliding seat 2. The rigid frame 3 is in a Y-shaped structure, and a horizontal rod 4 is installed at the bottom end of the rigid frame 3. Two groups of suspension units 5 are installed on the bottom surface of the horizontal rod 4. The suspension unit 5 includes a first shaft 501 and a second shaft 502. The first shaft 501 is slidably matched with the horizontal rod 4 in the vertical direction, and the second shaft 502 is movably matched with the horizontal rod 4, that is, the second shaft 502 can both rotate relative to the horizontal rod 4 and lift relative to the horizontal rod 4.

[0031] The axes of the first shaft 501 and the second shaft 502 are both in a vertical state, and the first shaft 501 and the second shaft 502 are arranged at uniform intervals. Hooks 503 are installed at the bottom ends of the first shaft 501 and the second shaft 502; the hook 503 includes an arc-shaped upper hook and a lower hook. The upper hook is in sliding fit with the first shaft 501 or the second shaft 502, and during the sliding process, the upper hook rotates around its axis; the second shaft 502 has a first state and a second state. In the first state of the second shaft 502, the plates suspended by each hook 503 are parallel to each other, as Figure 1 shown; in the second state of the second shaft 502, the plates suspended by adjacent hooks 503 are not parallel, as Figure 2 and Figure 3 shown.

[0032] In the initial state, each plate is placed on an external storage rack in a parallel state. The sliding seat 2 moves along the guide rail 1 to the upper part of the storage rack, and then the position of the storage rack is adjusted manually or by a robotic arm to synchronously adjust the positions of the plates, so that the hook 503 corresponds to the position of the hole slot on the plate. Then, each plate is translated, and the plate is pushed to move the hook 503, so that the hook 503 enters an inclined state. Specifically, the upper hook of the hook 503 rotates around its axis until the lower hook of the hook 503 enters the hole slot on the plate; at this time, the external storage rack can be separated from the plate, and the plate will slide downward along the hook 503 under the action of gravity and restore the hook 503 to the Figure 1 shown state; thus, the suspension of the plate is completed; it should be noted that the plate suspended by the first shaft 501 will not drive the first shaft 501 to rotate when subjected to the force from the phosphating solution, while the plate suspended by the second shaft 502 will drive the second shaft 502 to rotate when subjected to the force from the phosphating solution, that is, the plate suspended by the second shaft 502 can swing in the phosphating tank.

[0033] During the conveying process, each plate and the hook 503 are immersed in the phosphating solution. Taking Figure 4 as an example, the arrow direction in the figure is the conveying direction of the plate; Figure 4 In the state (top view), the leftmost plate is suspended on the second shaft 502, and it rotates counterclockwise by a certain angle compared with the initial state, so it does not completely block the plate on its right side. Part of the phosphating solution will flow from one side to the other side between it and the adjacent plate, thus promoting the exchange of the phosphating solution between the two plates and the external phosphating solution. When the leftmost plate rotates clockwise by a certain angle to reset, it will also push the phosphating solution between it and the adjacent plate, which will also promote the flow of the phosphating solution. In this way, the phosphating degree of the surfaces of each plate is ensured to be consistent.

[0034] In summary, when the metal sheet is immersed and conveyed in the phosphating tank in this embodiment, the sheets suspended by two adjacent first shafts 501 always remain parallel to each other, while the sheet suspended by the second shaft 502 located between these two sheets swings reciprocally, enabling the phosphating solution between adjacent sheets to flow, thereby promoting the exchange of the phosphating solution between adjacent sheets and the rest of the phosphating solution in the phosphating tank, ensuring that the phosphating degree of each sheet surface is consistent. In this embodiment, only the sheet suspended by the second shaft swings by a certain amplitude. Compared with the traditional method of driving each sheet to rotate continuously, the resistance of the sheet from the phosphating solution is greatly reduced.

[0035] Embodiment 2

[0036] Regarding how to drive the second shaft 502 to rotate reciprocally to achieve the reciprocal swing of the sheet it suspends, the first consideration is to install an electric drive source, such as a motor, on the horizontal rod 4 to directly drive the second shaft 502 to rotate. However, in actual operation, since the phosphating solution will splash onto the motor housing and damage the motor, the cost will be very high in the long run, and the motor only needs to work when passing through the phosphating tank, which also adds a burden to the programming cost of the motor. Based on this, the following design is also carried out in this embodiment to solve the above problems.

[0037] As Figure 5 shown, a gear 6 coaxial with the second shaft 502 is sleeved on the second shaft 502, and the second shaft 502 and the gear 6 always rotate synchronously. The horizontal rod 4 is of a hollow structure, and a slide plate 7 is slidably installed horizontally inside the horizontal rod 4. Transmission teeth 8 that cooperate with the gear 6 are fixedly installed at positions corresponding to the gear 6 on the slide plate 7. A ball is installed on the horizontal rod 4 to cooperate with the second shaft 502 to reduce the friction between the two. A convex block 9 is fixedly installed on the slide plate 7, and two limiting blocks 10 corresponding to the position of the convex block 9 are fixedly installed on the inner wall of the horizontal rod 4, so that the slide plate 7 can only slide reciprocally within a certain range, thereby ensuring that the gear 6 is always engaged with its corresponding transmission teeth 8. A horizontal spiral spring 11 is fixedly connected between the slide plate 7 and the inner wall of the horizontal rod 4. A lifting rod 12 is slidably installed vertically at the end of the horizontal rod 4, and a stainless steel housing 13 made of stainless steel is fixedly installed at the bottom end of the lifting rod 12. A push-pull rod 14 is fixedly installed at the end of the slide plate 7. A roller 15 is installed at one end of the push-pull rod 14, and an arc-shaped plate 16 that fits with the roller 15 is fixedly installed on the lifting rod 12. In this embodiment, the width of the phosphating tank is 4 meters, the stainless steel housing 13 is a cuboid housing, the width of the stainless steel housing 13 is 3 meters, the height is 10 centimeters, and the length is 20 centimeters.

[0038] Specifically, after the sheet is immersed in the phosphating tank, the stainless steel housing 13 will float in the phosphating tank. The buoyancy of the phosphating tank causes the stainless steel housing 13, the lifting rod 12, and the arc-shaped plate 16 to rise. During the rising process of the arc-shaped plate 16, it pushes the roller 15 and the push-pull rod 14 to translate. The push-pull rod 14 pushes the sliding plate 7 to translate against the pulling force of the helical spring 11. During the translation of the sliding plate 7, the transmission gear 8 causes the gear 6 meshing with it to rotate. The gear 6 drives the second shaft 502 to rotate, and finally causes the sheet suspended by the second shaft 502 to rotate. When the sheet translates in the phosphating tank, it will push the phosphating solution, and waves will be generated on the surface of the phosphating tank (in this embodiment, the speed of the sliding seat 2 during transportation changes, that is, the sheet accelerates and decelerates periodically in the phosphating tank), thereby causing the stainless steel housing 13 to move up and down. The helical spring 11 will continuously stretch and contract, and finally cause the second shaft 502 and the sheet suspended by it to swing reciprocally. Take Figure 5 as an example to illustrate, Figure 5 In this state, the stainless steel housing 13 has reached its upper dead center and will then descend as shown by the arrow in the figure. The sliding plate 7 will translate in the direction shown by the arrow, and the second shaft 502 will rotate in the direction shown by the arrow. It should be noted that in this embodiment, a push plate that can push the phosphating solution to flow can also be set in the phosphating tank to achieve the undulation of the surface of the phosphating solution.

[0039] To sum up, in this embodiment, without configuring an additional power source, the effect of the reciprocating swing of the second shaft 502 and the sheet suspended by it can be achieved, and only when the sheet is immersed in the phosphating tank and being transported, the second shaft 502 and the sheet suspended by it will swing; during the process of hanging the sheet on the hanging unit 5, the second shaft 502 can remain in the first state to facilitate the hanging of the sheet.

[0040] Embodiment 3

[0041] During the actual transportation process, since the upper hook of the hook 503 can slide relative to the first shaft 501 and the second shaft 502, when the sheet is affected by the force of the phosphating solution during translation, it may drive the hook 503 to move relative to the first shaft 501 and the second shaft 502, resulting in collisions between adjacent sheets. Obviously, this is not allowed. To solve this problem, the following design is made in this embodiment.

[0042] As Figure 6 shown, a positioning groove 504 is opened at the top of the upper hook of the hook 503, and receiving grooves 505 are opened inside both the first shaft 501 and the second shaft 502. A positioning pin 506 that cooperates with the positioning groove 504 is movably installed in the receiving groove 505. When the positioning pin 506 is inserted into the positioning groove 504, the hook 503 will not slide relative to the first shaft 501 and the second shaft 502, and the sheets will not collide.

[0043] As Figure 6As shown, the gear 6 is rotationally fitted with the horizontal rod 4, and the second shaft 502 is slidably fitted with the gear 6 in the vertical direction. An elastic member is connected between the two. The elastic member can be a spring or an elastic rope. A horizontal first cylindrical block 507 is installed on the positioning pin 506, and the first cylindrical block 507 is rotationally fitted with the positioning pin 506. Control plates 508 are slidably installed on both the first shaft 501 and the second shaft 502 in the horizontal direction. A first inclined slot 509 that cooperates with the first cylindrical block 507 is provided on the control plate 508. When the control plate 508 moves horizontally, the interaction force between the first inclined slot 509 and the first cylindrical block 507 will cause the first cylindrical block 507 and the positioning pin 506 to generate a vertical displacement relative to the first shaft 501 or the second shaft 502. Specifically, Figure 6 in, when the control plate 508 moves to the right, the first cylindrical block 507 and the positioning pin 506 rise, and the positioning pin 506 separates from the positioning groove 504.

[0044] As Figure 6 shown, semi-circular plates 510 coaxial with the second shaft 502 are rotatably installed at the positions corresponding to each second shaft 502 on the bottom surface of the horizontal rod 4. A second cylindrical block 511 parallel to the first cylindrical block 507 is installed on the lower surface of the semi-circular plate 510 through a rigid rod. A second inclined slot 512 that cooperates with the second cylindrical block 511 is provided on the control plate 508 of the second shaft 502. When the second shaft 502 moves upward relative to the horizontal rod 4, the control plate 508 will move upward relative to the horizontal rod 4 synchronously. The interaction force between the second inclined slot 512 and the second cylindrical block 511 will cause the control plate 508 to move to the right, so that the positioning pin 506 separates from the positioning groove 504.

[0045] Specifically, in the initial state, the second shaft 502 is at its top dead center position relative to the horizontal rod 4, and the positioning pin 506 is also at its top dead center position relative to the second shaft 502. After the hook 503 suspends the plate, the positions of the positioning groove 504 and the positioning pin 506 correspond (it should be noted that the positioning groove 504 and the positioning pin 506 do not need to be completely fitted, and there can be a gap between the two). The gravitational force of the plate drives the hook 503, the second shaft 502, and the control plate 508 to descend a certain distance relative to the horizontal rod 4. The elastic member deforms, and the control plate 508 moves to the left to reach Figure 6In the state shown, the positioning pin 506 is also inserted into the positioning groove 504. In this way, when the plate suspended by the second shaft 502 is in the suspended state, it will not drive the hook 503 to slide relative to the second shaft 502; when the second shaft 502 rotates, the control plate 508 and the semi-circular plate 510 will rotate synchronously. After phosphating is completed, the plate is lifted by an external force, and the gravity of the plate no longer acts on the hook 503. Then, the hook 503, the second shaft 502, and the control plate 508 are reset by a certain distance relative to the horizontal rod 4 under the action of the elastic member, the positioning groove 504 is separated from the positioning pin 506, and the operator can adjust the position of the hook 503 to separate the plate from the hook 503.

[0046] It should be noted that at the position of the bottom surface of the horizontal rod 4 corresponding to each first shaft 501, a second cylindrical block 511 parallel to the first cylindrical block 507 is installed through a rigid rod. The second cylindrical block 511 is rotationally matched with the rigid rod, and a second inclined groove 512 for cooperating with the second cylindrical block 511 is formed on the control plate 508 of the first shaft 501. Then, when the plate suspended by the first shaft 501 is in the suspended state, it will not drive the hook 503 to slide relative to the first shaft 501 either.

[0047] Only some exemplary embodiments of the present invention are described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A metal plate phosphating suspension feeding device, comprising a guide rail (1) and a sliding seat (2) movably matched with the guide rail (1), a rigid frame (3) being installed at the bottom of the sliding seat (2), a horizontal rod (4) being installed at the bottom end of the rigid frame (3), and two sets of suspension units (5) being installed on the bottom surface of the horizontal rod (4), characterized in that: The suspension unit (5) comprises a first shaft (501) which cannot generate relative rotation with the horizontal rod (4) and a second shaft (502) which movably cooperates with the horizontal rod (4); The axes of the first shaft (501) and the second shaft (502) are both in a vertical state, and the first shaft (501) and the second shaft (502) are evenly spaced, and hooks (503) are installed at the bottom ends of the first shaft (501) and the second shaft (502); the second shaft (502) has a first state and a second state, and in the first state of the second shaft (502), the plates suspended by the various hooks (503) are parallel to each other; in the second state of the second shaft (502), the plates suspended by adjacent hooks (503) are not parallel.

2. The metal sheet phosphating treatment hanging feeding device according to claim 1 is characterized in that: The second shaft (502) is sleeved with a coaxial gear (6), the horizontal rod (4) is a hollow structure and a slide plate (7) is slidably installed in the horizontal rod (4) in a horizontal direction, and transmission teeth (8) matching the gear (6) are fixedly installed at positions corresponding to the gear (6) on the slide plate (7).

3. A metal sheet phosphating treatment hanging feeding device according to claim 2, characterized in that: A protrusion (9) is fixedly mounted on the slide plate (7), and two limit blocks (10) corresponding to the positions of the protrusions (9) are fixedly mounted on the inner wall of the horizontal rod (4); a horizontal coil spring (11) is fixedly connected between the slide plate (7) and the inner wall of the horizontal rod (4).

4. The metal sheet phosphating treatment hanging feeding device according to claim 3 is characterized in that: A lifting rod (12) is slidably mounted on the end of the horizontal rod (4) in the vertical direction, and a stainless steel housing (13) is fixedly mounted on the bottom end of the lifting rod (12); a push-pull rod (14) is fixedly mounted on the end of the slide plate (7), a roller (15) is mounted on one end of the push-pull rod (14), and an arc-shaped plate (16) that fits the roller (15) is fixedly mounted on the lifting rod (12).

5. The metal sheet phosphating treatment hanging feeding device according to claim 4 is characterized in that: A ball bearing matched with the second shaft (502) is installed on the horizontal rod (4).

6. The metal sheet phosphating treatment hanging feeding device according to claim 5, characterized in that: The top of the hook (503) is provided with a positioning groove (504), and the inside of the first shaft (501) and the second shaft (502) are both provided with a receiving groove (505), and a positioning pin (506) cooperating with the positioning groove (504) is movably installed in the receiving groove (505).

7. The metal sheet phosphating treatment hanging feeding device according to claim 6, characterized in that: The second shaft (502) and the gear (6) are slidably matched in the vertical direction, and an elastic member is connected between the two; a horizontal first cylindrical block (507) is installed on the positioning pin (506), and a control plate (508) is slidably installed on the first shaft (501) and the second shaft (502) in the horizontal direction, and a first inclined groove (509) matching with the first cylindrical block (507) is opened on the control plate (508).

8. The metal sheet phosphating treatment hanging feeding device according to claim 7, characterized in that: A semicircular plate (510) coaxial with the No. 2 shaft (502) is rotatably mounted on the bottom surface of the horizontal rod (4) at a position corresponding to each No. 2 shaft (502); a second cylindrical block (511) parallel to the first cylindrical block (507) is mounted on the lower surface of the semicircular plate (510) via a rigid rod; and a second inclined groove (512) cooperating with the second cylindrical block (511) is provided on the control plate (508) of the No. 2 shaft (502).

9. The metal sheet phosphating treatment hanging feeding device according to claim 8, characterized in that: A second cylindrical block (511) parallel to the first cylindrical block (507) is installed at the position of each No. 1 shaft (501) on the bottom surface of the horizontal rod (4) via a rigid rod, and a second inclined groove (512) matching with the second cylindrical block (511) is provided on the control plate (508) of the No. 1 shaft (501).

10. The metal sheet phosphating treatment hanging feeding device according to claim 9, characterized in that: The first cylindrical block (507) is rotationally matched with the positioning pin (506), and the second cylindrical block (511) is rotationally matched with the rigid rod.

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