A hot galvanizing device for automobile bolts

Abstract

The present application relates to the technical field of automobile bolt plating, in particular to a hot galvanizing device for automobile bolts, which comprises a processing table, a galvanizing cylinder, a control case, a driving assembly, a lifting assembly and a hanging plate, etc., one side of the processing table is provided with a side plate, the arc-shaped groove on the side plate cooperates with the moving assembly driven by the first motor, so that the base is automatically at the lowest point in the loading and unloading stations, the galvanizing station is precisely aligned with the galvanizing cylinder, the bolts are independently hung through the annular frame, the hanging plate adopts a detachable clamping structure, the second motor drives the bolts to rotate at a constant speed, cooperates with the arc-shaped protrusions at the bottom of the galvanizing cylinder to make the bolts reciprocate and jump, and the lifting assembly controls the immersion depth of the bolts, the device solves the problems of bolt occlusion, collision and uneven plating in the traditional frame soaking process, and through the independent hanging, stable rotation and jumping design, the surface precision of the bolts and the uniformity of the plating layer are ensured.

Description

Technical Field

[0001] This invention relates to the field of automotive bolt plating technology, specifically to a hot-dip galvanizing device for automotive bolts. Background Technology

[0002] As core fasteners in critical components such as the chassis and engine of automobiles, automotive bolts' corrosion resistance directly affects vehicle safety and service life. Hot-dip galvanizing is a commonly used anti-corrosion treatment process for automotive bolts. Due to its strong coating adhesion and long-lasting protective effect, it is widely used in small-batch production or fastener processing scenarios with high quality requirements. Among them, M14 and other types of automotive bolts have special structural features (see instruction manual). Figure 10 As shown, its top is a smooth cylindrical structure and its bottom is a threaded structure. The quality of the anti-corrosion treatment of the threaded surface is particularly critical.

[0003] In existing technologies, hot-dip galvanizing of small batches of automotive bolts often employs a frame immersion method: the bolts are directly placed into a perforated frame, and then the frame is immersed in a galvanizing bath to complete the galvanizing process. However, this process has significant drawbacks: Firstly, when bolts are stacked in the frame, the threaded surfaces of adjacent bolts easily interlock due to friction, making complete separation difficult even with stirring, leading to difficulties in subsequent disassembly. Furthermore, the areas in contact with the frame when bolts are stacked create obstructions, resulting in uneven galvanizing thickness and even missed galvanizing in some areas, failing to meet the corrosion resistance requirements of automotive bolts. Secondly, the bolts collide violently during the stirring process, easily causing thread damage and surface scratches, reducing bolt dimensional accuracy, affecting finished product quality, and further impacting production efficiency and product qualification rate. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a hot-dip galvanizing device for automotive bolts.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hot-dip galvanizing device for automotive bolts, comprising a processing table and a control box, wherein a galvanizing cylinder is provided in the middle part of the processing table, a heating device is provided at the bottom end of the galvanizing cylinder, a loading station and a unloading station are symmetrically arranged on both sides of the galvanizing cylinder, a controller is fixedly installed at the upper end of the processing table, a side plate is fixedly installed on one side of the processing table, an arc groove is provided on the side plate, a moving component is slidably installed at the arc groove, and a driving component is provided below the processing table to drive the moving component to slide along the arc groove;

[0008] Above the movable component is a guide component that slides along the top of the side plate;

[0009] A top plate is fixedly installed in front of the moving component, and a lifting component is fixedly installed in front of the guiding component. The lifting component is located above the top plate. A circular block is rotatably installed on the top plate. A cavity is provided in the center of the circular block. A base is provided below the circular block. Two support rods that penetrate the circular block are symmetrically installed at the upper end of the base. A stop block is fixedly installed at the top of the support rod. A return spring that is penetrated by the support rod is provided at the lower end of the stop block. A pressure rod that penetrates the cavity is provided at the output end of the lifting component. A detachable hanging plate is provided below the base.

[0010] Multiple hanging rods are fixedly installed at the lower end of the hanging plate, and a ring frame is fixedly installed at the lower end of the hanging rods. Multiple arc-shaped protrusions are fixedly installed at the bottom of the galvanized cylinder.

[0011] To facilitate the movement of the top plate, the present invention includes the following improvements: the moving component comprises a cylindrical block and two positioning frames. The cylindrical block passes through the arc-shaped groove and slides with it. The two positioning frames are located on both sides of the side plate and are installed at both ends of the cylindrical block. The two ends of the cylindrical block are rotatably connected to the positioning plates via bearings. The driving component comprises a driving rod and a first motor. The first motor is fixed below the processing table. The driving rod is located on the rear side of the side plate. The output end of the first motor is provided with a driving shaft connected to the bottom end of the driving rod. A positioning plate is fixedly installed on the positioning frame on the rear side of the side plate. The positioning plate passes through the top of the driving rod and rotatably engages with it. The axis of the driving shaft is at the same position as the center of the arc-shaped groove.

[0012] To improve the stability of the movable seat during sliding, the present invention includes the following improvements: the guide assembly includes a movable seat, a first guide rail is fixedly installed at the upper end of the side plate, the movable seat is penetrated by the first guide rail, the movable seat is slidably connected to the first guide rail, vertical rods are fixedly installed at the upper ends of the two positioning plates, the vertical rods penetrate the movable seat and are slidably connected to the movable seat, a bearing plate is fixedly installed at the front end of the movable seat, and a lifting assembly is fixed at the upper end of the bearing plate.

[0013] To facilitate the rotation of the circular block, the present invention includes the following improvements: a circular groove is provided on the top plate, the circular block is inserted into the circular groove and rotatably connected to the top plate via a bearing, a circular plate is fixedly mounted on the upper end of the circular block, the circular plate is located on the upper end of the top plate, a toothed ring is provided on the periphery of the circular plate, a second motor is provided on the lower end of the top plate, the second motor is located on the rear side of the circular block, the output end of the second motor is provided with a gear that meshes with the circular plate, a cavity penetrates through the circular plate, the diameter of the circular plate is larger than the diameter of the circular block, and the bottom end of the return spring is fixed to the upper end of the circular plate.

[0014] To facilitate assembly of the mounting plate, the present invention includes the following improvements: a positioning groove is provided at the bottom of the base, and a positioning block is provided at the upper end of the mounting plate, which is inserted into the positioning groove. Two slots are symmetrically arranged on the inner wall of the positioning groove, and two grooves are symmetrically arranged on both sides of the positioning block. A first spring is provided in the groove, one end of which is fixed inside the groove, and the other end is provided with a locking block that cooperates with the slot. The locking block fits tightly with the slot, and the locking block has a right-angled trapezoidal structure. The bottom corner of the outer end of the locking block is also provided with an arc surface. Two L-shaped pressure plates are symmetrically arranged on both sides of the base, and a push rod that penetrates the base and is inserted into the slot is provided in the middle part of the L-shaped pressure plate.

[0015] Furthermore, the present invention includes the following improvements: two empty slots are provided on the two symmetrical push rods on both sides of the positioning groove; a second spring is fixedly installed inside the empty slot; a guide rod is provided on the inner side of the L-shaped pressure plate, which is inserted into the empty slot and connected to the second spring; the rear end of the L-shaped pressure plate is attached to the rear side of the positioning groove; a sliding groove is also provided on the rear side of the L-shaped pressure plate; a second guide rail is provided on the rear side of the positioning groove, which passes through the sliding groove; and a toggle block is fixedly installed on the rear end of the L-shaped pressure plate.

[0016] To improve the smoothness of the base during lifting, the present invention includes the following improvements: the circular block, the circular plate, and the gear ring are integrated into one structure; the circular block has a through hole through which the support rod passes; multiple ball bearings are arranged around the inner wall of the through hole, and all the ball bearings are in contact with the outer wall of the support rod.

[0017] To facilitate assembly of the ring frame, the present invention includes the following improvements: the ring frame and the hanging rod are integrated into one structure; the top end of the hanging rod is fixed to the lower end of the hanging plate by screws; the inner ring of the ring frame is polished; the surface of the arc-shaped protrusions is polished; a fixing plate is provided at the bottom of the galvanized cylinder; the fixing plate is fixed to the bottom of the galvanized cylinder by screws; multiple arc-shaped protrusions are located at the upper end of the fixing plate; and the arc-shaped protrusions and the fixing plate are integrated into one structure.

[0018] To improve the safety factor during the loading and unloading process, the present invention includes the following improvements: two fixed seats are symmetrically arranged at both ends of the first guide rail; a button switch is provided on the side of the fixed seat near the movable seat; two limiting holes are symmetrically arranged on the side plate; a propulsion assembly is fixedly arranged on the back of the drive rod; a limiting rod penetrating the limiting hole is provided at the output end of the propulsion assembly; and the button switch, control box, and propulsion assembly are respectively connected by electrical signals.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a hot-dip galvanizing device for automotive bolts, which has the following advantages:

[0021] The ring frame allows for independent hanging of bolts, ensuring that adjacent bolts do not come into direct contact during the entire processing. This fundamentally prevents the threaded surfaces from seizing together due to friction. At the same time, the bolts do not collide with each other during rotation and runout, effectively protecting the threaded structure and the surface precision of the bolts, and eliminating quality defects such as scratches and dimensional deviations.

[0022] The bolt's uniform rotation and reciprocating movement not only ensures full contact between the galvanizing solution and the bolt surface, but also fully exposes areas that are easily obscured, preventing issues such as missed plating or uneven coating. The flexible contact design between the arc-shaped protrusion and the bolt further optimizes the uniformity of coating adhesion.

[0023] Through the precise coordination of the arc groove and the drive component, the device can automatically position the base at the lowest point above the processing table when it is in the loading and unloading positions. When it swings above the galvanizing cylinder, it can smoothly achieve the operation of immersing the bolts in the galvanizing liquid, so that the hanging plate does not need to be excessively lifted, greatly reducing labor intensity, further improving the convenience of loading and unloading, and reducing operation time. Attached Figure Description

[0024] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a second-view three-dimensional structural diagram of the present invention;

[0026] Figure 3 This is the front view of the present invention;

[0027] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at point A;

[0028] Figure 5 For the present invention Figure 1 A magnified schematic diagram of the local structure at point B;

[0029] Figure 6 This is a partial cross-sectional view of the L-shaped pressure plate in this invention;

[0030] Figure 7 This is a top view of the ring frame in this invention;

[0031] Figure 8 This is a schematic diagram of the assembly structure of the positioning block and the positioning groove in this invention;

[0032] Figure 9 This is a schematic diagram of the installation structure of the cylindrical block in this invention;

[0033] Figure 10 This is a schematic diagram of the structure of the automotive bolt in this invention.

[0034] In the diagram: 1. Processing table; 2. Galvanized cylinder; 3. Heating device; 4. Arc-shaped protrusion; 5. Loading station; 6. Unloading station; 7. Control box; 8. First motor; 9. Drive rod; 10. Positioning frame; 11. Positioning plate; 12. Cylindrical block; 13. Vertical rod; 14. Moving seat; 15. Propulsion assembly; 16. Fixed seat; 17. Push button switch; 18. Limiting hole; 19. Arc-shaped groove; 20. Side plate; 21. First guide rail; 22. Top plate; 23. Circular block; 24. Circular plate; 25. Gear ring; 6. Gear; 27. Second motor; 28. Cavity; 29. ​​Lifting assembly; 30. Pressure rod; 31. Base; 32. Support rod; 33. Stop block; 34. Return spring; 35. Hanging plate; 36. Hanging rod; 37. Ring frame; 38. Positioning groove; 39. Positioning block; 40. Groove; 41. First spring; 42. Slot; 43. Locking block; 44. L-shaped pressure plate; 45. Push rod; 46. Hollow groove; 47. Guide rod; 48. Actuating block; 49. Second guide rail; 50. Controller; 51. Fixing plate. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-10 The present invention discloses a hot-dip galvanizing device for automotive bolts, comprising a processing table 1 and a control box 7. A galvanizing cylinder 2 is provided in the middle part of the processing table 1, and a heating device 3 is provided at the bottom end of the galvanizing cylinder 2. A loading station 5 and a unloading station 6 are symmetrically arranged on both sides of the galvanizing cylinder 2. A controller 50 is fixedly installed at the upper end of the processing table 1. A side plate 20 is fixedly installed on one side of the processing table 1. An arc groove 19 is provided on the side plate 20. A moving component is slidably installed at the arc groove 19. A driving component is provided below the processing table 1 to drive the moving component to slide along the arc groove 19.

[0037] Above the movable component is a guide component that slides along the top of the side plate 20;

[0038] A top plate 22 is fixedly installed in front of the moving component, and a lifting component 29 is fixedly installed in front of the guiding component. The lifting component 29 is located above the top plate 22. A circular block 23 is rotatably installed on the top plate 22. A cavity 28 is provided at the center of the circular block 23. A base 31 is provided below the circular block 23. Two support rods 32 are symmetrically arranged at the upper end of the base 31, penetrating the circular block 23. A stop block 33 is fixedly installed at the top of the support rod 32. A return spring 34 is provided at the lower end of the stop block 33, penetrating the support rod 32. A pressure rod 30 is provided at the output end of the lifting component 29, penetrating the cavity 28. A detachable hanging plate 35 is provided below the base 31.

[0039] Multiple hanging rods 36 are fixedly installed at the lower end of the hanging plate 35, and a ring frame 37 is fixedly installed at the lower end of the hanging rods 36. Multiple arc-shaped protrusions 4 are fixedly installed at the bottom of the galvanized cylinder 2.

[0040] The moving component includes a cylindrical block 12 and two positioning frames 10. The cylindrical block 12 passes through the arc-shaped groove 19 and slides with the arc-shaped groove 19. The two positioning frames 10 are located on both sides of the side plate 20 and are installed at both ends of the cylindrical block 12. The two ends of the cylindrical block 12 are rotatably connected to the positioning plate 11 through bearings. The driving component includes a driving rod 9 and a first motor 8. The first motor 8 is fixed below the processing table 1. The driving rod 9 is located on the rear side of the side plate 20. The output end of the first motor 8 is provided with a driving shaft connected to the bottom end of the driving rod 9. The positioning plate 11 is fixedly installed on the positioning frame 10 on the rear side of the side plate 20. The positioning plate 11 passes through the top of the driving rod 9 and rotates with the driving rod 9. The axis of the driving shaft is at the same position as the center of the arc-shaped groove 19, so that the position of the top plate 22 can be easily moved.

[0041] The guiding assembly includes a movable seat 14, a first guide rail 21 fixedly installed at the upper end of the side plate 20, the movable seat 14 being penetrated by the first guide rail 21, the movable seat 14 being slidably connected to the first guide rail 21, a vertical rod 13 fixedly installed at the upper end of each of the two positioning plates 11, the vertical rod 13 penetrating the movable seat 14 and being slidably connected to the movable seat 14, a bearing plate fixedly installed at the front end of the movable seat 14, and a lifting assembly 29 fixed at the upper end of the bearing plate, which can improve the stability of the movable seat 14 when sliding.

[0042] The top plate 22 is provided with a circular groove. A circular block 23 is inserted into the circular groove and is rotatably connected to the top plate 22 via a bearing. A circular plate 24 is fixedly installed at the upper end of the circular block 23. The circular plate 24 is located at the upper end of the top plate 22. A toothed ring 25 is provided on the periphery of the circular plate 24. A second motor 27 is provided at the lower end of the top plate 22. The second motor 27 is located behind the circular block 23. A gear 26 that meshes with the circular plate 24 is provided at the output end of the second motor 27. A cavity 28 passes through the circular plate 24. The diameter of the circular plate 24 is larger than the diameter of the circular block 23. The bottom end of the return spring 34 is fixed to the upper end of the circular plate 24, which allows the circular block 23 to rotate easily.

[0043] The base 31 has a positioning groove 38 at its lower end, and the upper end of the hanging plate 35 has a positioning block 39 that is inserted into the positioning groove 38. Two slots 42 are symmetrically arranged on the inner wall of the positioning groove 38. Two grooves 40 are symmetrically arranged on both sides of the positioning block 39. A first spring 41 is provided in the groove 40. One end of the first spring 41 is fixed inside the groove 40, and the other end has a locking block 43 that cooperates with the slot 42. The locking block 43 fits tightly with the slot 42, and the locking block 43 has a right-angled trapezoidal structure. The bottom corner of the outer end of the locking block 43 also has an arc surface. Two L-shaped pressure plates 44 are symmetrically arranged on both sides of the base 31. The middle part of the L-shaped pressure plate 44 has a push rod 45 that penetrates the base 31 and is inserted into the slot 42, so that the hanging plate 35 is easy to assemble.

[0044] The positioning groove 38 has two symmetrical push rods 45 on both sides with two empty slots 46. A second spring is fixedly installed inside the empty slot 46. The inner side of the L-shaped pressure plate 44 is provided with a guide rod 47 that is inserted into the empty slot 46 and connected to the second spring. The rear end of the L-shaped pressure plate 44 fits against the rear side of the positioning groove 38. The rear side of the L-shaped pressure plate 44 is also provided with a sliding groove. The rear side of the positioning groove 38 is provided with a second guide rail 49 that passes through the sliding groove. The rear end of the L-shaped pressure plate 44 is fixedly provided with a toggle block 48.

[0045] Two fixed seats 16 are symmetrically arranged at both ends of the first guide rail 21. A button switch 17 is provided on the side of the fixed seat 16 near the movable seat 14. Two limiting holes 18 are symmetrically arranged on the side plate 20. A push assembly 15 is fixedly arranged on the back of the drive rod 9. A limiting rod through the limiting hole 18 is provided at the output end of the push assembly 15. The button switch 17, the control box 7 and the push assembly 15 are connected by electrical signals, which can improve the safety factor in the loading and unloading process.

[0046] Preparation stage: Pass the automotive bolts to be galvanized one by one through the ring frame 37. Utilize the limiting fit between the bolt head and the ring frame 37 to allow the smooth cylindrical part at the top of the bolt to pass through the inner ring of the ring frame 37, thereby achieving independent hanging of each bolt and avoiding direct contact between bolts.

[0047] Loading operation: Place the hanging plate 35 with the bolts on it at the loading station 5 (both the loading station 5 and the unloading station 6 have open limiting grooves, the size of which is larger than that of the hanging plate 35, to facilitate loading or unloading of the hanging plate 35. The hanging plate 35 can pass through the open limiting groove. During the loading and unloading of the hanging plate 35, the ring frame 37 is located below the processing table 1). Start the system loading program through the controller 50. After the first motor 8 starts, it drives the drive rod 9 to swing, causing the cylindrical block 12 to slide along the arc groove 19. At the same time, the vertical rod 13 slides in the moving seat 14, and the moving seat 14 slides synchronously along the first guide rail 21 to ensure that the positioning frame 10 always remains vertical. When the moving seat 14 touches the button switch 17 at the left end of the first guide rail 21, the first motor 8 stops, the push assembly 15 starts, inserts the limiting rod into the limiting hole 18, realizes the precise positioning of the moving assembly, and prevents the base 31 from shaking during the loading process. Then, the positioning block 39 at the upper end of the mounting plate 35 is inserted into the positioning groove 38 of the base 31, and the first spring 41 pushes the locking block 43 to engage with the locking groove 42, thus completing the stable assembly of the mounting plate 35 and the base 31.

[0048] Galvanizing operation: The galvanizing program is started via controller 50. First, the push assembly 15 drives the limit rod to reset, the first motor 8 starts again, and drives the moving assembly to slide directly above the galvanizing cylinder 2. At this time, the moving seat 14 is located in the middle of the first guide rail 21. The lifting assembly 29 starts and pushes the pressure rod 30 down, applying pressure to the base 31 through the pressure rod 30, which compresses the return spring 34. The hanging rod 36 drives the ring frame 37 and the bolt to be immersed in the galvanizing liquid in the galvanizing cylinder 2. The bolt is naturally vertical under the action of gravity. After a period of time, the bottom of the bolt is galvanized. As the lifting assembly 29 continues to press down, after the lower end of the bolt touches the bottom, the part that was originally covered by the ring frame 37 is completely exposed. The second motor 27 is started, and the circular block 23 is driven to rotate through the meshing transmission of gear 26 and gear ring 25. In turn, the support rod 32 drives the base 31, hanging plate 35 and bolt to rotate synchronously and uniformly. With the help of the arc-shaped protrusion 4 at the bottom of the galvanized cylinder 2, the bolt reciprocates during the rotation. Since the inner diameter of the ring frame is smaller than the bolt head diameter, the thread end of the bolt is far away from the ring frame when it hangs down naturally. During the jumping process, the jumping amplitude will not cause the thread at the bottom of the bolt to contact the ring frame 37, and will not affect the smoothness of the bolt during the reciprocating jumping. The distance between the inner wall of the ring frame and the top of the bolt is 1-2mm.

[0049] Reset Drainage: After galvanizing, the lifting assembly 29 drives the pressure rod 30 to rise and reset. The reset spring 34 elastically restores its position, pushing the base 31 to rise, causing the bolt to detach from the galvanizing solution and be positioned above the galvanizing cylinder 2. Utilizing the austenitic stainless steel material of the ring frame 37 and the hanging rod 36, the attached galvanizing solution is allowed to drip naturally back into the galvanizing cylinder 2, avoiding waste. Furthermore, no galvanizing solution remains on the inner ring of the ring frame 37, and the portion of the bolt located on the inner ring of the ring frame 37 is also a smooth structure. Since the hardness of austenitic stainless steel is less than that of automotive bolts, the bolt will not be damaged during the movement.

[0050] Unloading: The controller 50 starts the unloading program. The first motor 8 drives the moving component to slide above the unloading station 6. The moving seat 14 presses the button switch 17 on the right end of the first guide rail 21 to achieve limit fixation. Pressing the toggle block 48 moves the L-shaped pressure plate 44. The push rod 45 pushes out the locking block 43 in the slot 42. The first spring 41 and the second spring are compressed, and the positioning block 39 disengages from the positioning slot 38, removing the hanging plate 35. Then, after releasing the toggle block 48, the spring automatically resets, and the device returns to the ready-to-load state, ready for the next batch of bolts to be processed.

[0051] The circular block 23, circular plate 24, and gear ring 25 are an integrated structure. The circular block 23 has a through hole through which the support rod 32 passes. Multiple balls are arranged around the inner wall of the through hole, and all the balls are in contact with the outer wall of the support rod 32. During the lifting and lowering process of the support rod 32, the friction between the support rod 32 and the circular block 23 and the circular plate 24 can be reduced, thereby improving the smoothness of the support rod 32 during the lifting and lowering process.

[0052] The lifting assembly 29 can be made of industrial-grade high-precision electric lifting rod, the propulsion assembly 15 can be made of industrial-grade high-precision electric push rod 45, and the first motor 8 and the second motor 27 can both be made of servo motor.

[0053] Recommended type of return spring 34: Stainless steel cylindrical helical compression spring.

[0054] Recommended type for spring 41: small stainless steel cylindrical helical compression spring.

[0055] Recommended type of second spring: miniature stainless steel cylindrical helical compression spring. The installation method of the second spring is the same as that of the first spring 41, so no further description is needed here.

[0056] The mounting plate 35 adopts a detachable snap-fit ​​structure. It is automatically snapped in place by a spring during assembly and can be quickly separated by simply pressing the actuating block 48 during unloading. The operation is convenient and efficient. Combined with the automated control of the moving and positioning mechanism, it enables continuous operation of loading, galvanizing and unloading, which greatly shortens the single processing cycle.

[0057] The ring frame 37 and the hanging rod 36 are integrated structures. The top of the hanging rod 36 is fixed to the lower end of the hanging plate 35 by screws. The inner ring of the ring frame 37 is polished, and the surface of the arc-shaped protrusion 4 is polished. The bottom of the galvanized cylinder 2 is provided with a fixing plate 51, which is fixed to the bottom of the galvanized cylinder 2 by screws. Multiple arc-shaped protrusions 4 are located at the upper end of the fixing plate 51, and the arc-shaped protrusions 4 and the fixing plate 51 are integrated structures.

[0058] During the loading and unloading process, the double limit of button switch 17 and limit rod ensures accurate positioning of the moving component and avoids shaking and deviation. The fixing plate 51 is made of low hardness material, so it will not wear itself when the bolts jump. The fixing plate 51 is fixed by screws, and it can be easily replaced after wear, reducing equipment maintenance costs.

[0059] A dedicated mounting and transmission mechanism is designed specifically for the structural characteristics of automotive bolts. This mechanism is suitable for small-batch, high-precision processing and can also meet the needs of continuous production through automated control. It effectively compensates for the compatibility defects of traditional frame immersion processes and improves the versatility and practicality of the process.

[0060] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A hot galvanizing device for automobile bolts, comprising a processing table and a control cabinet, a galvanizing cylinder is arranged in the middle part of the processing table, a heating device is arranged at the bottom end of the galvanizing cylinder, a feeding station and a discharging station are symmetrically arranged at both sides of the galvanizing cylinder, and a controller is fixedly arranged at the upper end of the processing table, characterized in that: A side plate is fixedly installed on one side of the processing table. An arc-shaped groove is provided on the side plate. A moving component is slidably installed in the arc-shaped groove. A driving component is provided below the processing table to drive the moving component to slide along the arc-shaped groove. Above the movable component is a guide component that slides along the top of the side plate; A top plate is fixedly installed in front of the moving component, and a lifting component is fixedly installed in front of the guiding component. The lifting component is located above the top plate. A circular block is rotatably installed on the top plate. A cavity is provided in the center of the circular block. A base is provided below the circular block. Two support rods that penetrate the circular block are symmetrically installed at the upper end of the base. A stop block is fixedly installed at the top of the support rod. A return spring that is penetrated by the support rod is provided at the lower end of the stop block. A pressure rod that penetrates the cavity is provided at the output end of the lifting component. A detachable hanging plate is provided below the base. Multiple hanging rods are fixedly installed at the lower end of the hanging plate, and a ring frame is fixedly installed at the lower end of the hanging rods. Multiple arc-shaped protrusions are fixedly installed at the bottom of the galvanized cylinder. The moving component includes a cylindrical block and two positioning frames. The cylindrical block passes through the arc-shaped groove and slides with the arc-shaped groove. The two positioning frames are located on both sides of the side plate and installed at both ends of the cylindrical block. The two ends of the cylindrical block are rotatably connected to the positioning plate through bearings. The driving component includes a driving rod and a first motor. The first motor is fixed below the processing table. The driving rod is located on the rear side of the side plate. The output end of the first motor is provided with a driving shaft connected to the bottom end of the driving rod. A positioning plate is fixedly installed on the positioning frame on the rear side of the side plate. The positioning plate passes through the top of the driving rod and rotatably engages with the driving rod. The axis of the driving shaft is at the same position as the center of the arc-shaped groove. The guide assembly includes a movable seat, a first guide rail fixedly installed at the upper end of the side plate, the movable seat being penetrated by the first guide rail and slidably connected to the first guide rail, vertical rods fixedly installed at the upper ends of the two positioning plates, the vertical rods penetrating the movable seat and slidably connected to the movable seat, a bearing plate fixedly installed at the front end of the movable seat, and a lifting assembly fixed at the upper end of the bearing plate. The top plate is provided with a circular groove, and a circular block is inserted into the circular groove and rotatably connected to the top plate through a bearing. A circular plate is fixedly installed at the upper end of the circular block. The circular plate is located at the upper end of the top plate. A toothed ring is provided on the periphery of the circular plate. A second motor is provided at the lower end of the top plate. The second motor is located at the rear side of the circular block. The output end of the second motor is provided with a gear that meshes with the circular plate. A cavity passes through the circular plate. The diameter of the circular plate is larger than the diameter of the circular block. The bottom end of the return spring is fixed at the upper end of the circular plate. The base has a positioning groove at its bottom and a positioning block that is inserted into the positioning groove at the top of the hanging plate. Two slots are symmetrically arranged on the inner wall of the positioning groove. Two grooves are symmetrically arranged on both sides of the positioning block. A first spring is provided in the groove. One end of the first spring is fixed inside the groove, and the other end is provided with a locking block that cooperates with the slot. The locking block fits tightly with the slot and is a right-angled trapezoidal structure. The bottom corner of the outer end of the locking block is also provided with an arc surface. Two L-shaped pressure plates are symmetrically arranged on both sides of the base. The middle part of the L-shaped pressure plate is provided with a push rod that penetrates the base and is inserted into the slot.

2. The hot-dip galvanizing device for automotive bolts according to claim 1, characterized in that: The positioning groove has two symmetrical push rods on both sides with two empty slots. A second spring is fixedly installed inside the empty slot. The inner side of the L-shaped pressure plate is provided with a guide rod that is inserted into the empty slot and connected to the second spring. The rear end of the L-shaped pressure plate fits against the rear side of the positioning groove. The rear side of the L-shaped pressure plate is also provided with a sliding groove. The rear side of the positioning groove is provided with a second guide rail that passes through the sliding groove. A toggle block is fixedly installed at the rear end of the L-shaped pressure plate.

3. The hot-dip galvanizing device for automotive bolts according to claim 2, characterized in that: The circular block, circular plate, and gear ring are an integrated structure. The circular block has a through hole through which the support rod passes. Multiple ball bearings are arranged around the inner wall of the through hole, and all the ball bearings are in contact with the outer wall of the support rod.

4. The hot-dip galvanizing device for automotive bolts according to claim 3, characterized in that: The ring frame and the hanging rod are an integrated structure. The top of the hanging rod is fixed to the lower end of the hanging plate with screws. The inner ring of the ring frame is polished, and the surface of the arc-shaped protrusions is polished. The bottom of the galvanized cylinder is provided with a fixing plate, which is fixed to the bottom of the galvanized cylinder with screws. Multiple arc-shaped protrusions are located on the upper end of the fixing plate, and the arc-shaped protrusions and the fixing plate are an integrated structure.

5. The hot-dip galvanizing device for automotive bolts according to claim 4, characterized in that: Two fixed seats are symmetrically arranged at both ends of the first guide rail. A button switch is provided on the side of the fixed seat near the moving seat. Two limiting holes are symmetrically arranged on the side plate. A propulsion assembly is fixedly arranged on the back of the drive rod. A limiting rod through the limiting hole is provided at the output end of the propulsion assembly. The button switch, the control box and the propulsion assembly are respectively connected by electrical signals.

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