Surface coating device for rivet nut production

Abstract

The invention discloses a surface coating device for rivet nut production, which is characterized in that a fixing frame is placed at each of the front end and the rear end in an electroplating bath, an electroplating cylinder is rotatably mounted between the two fixing frames through a bearing, and the electroplating cylinder is connected with a driving part; a cleaning mechanism used for cleaning the electroplating cylinder is installed in the middle of the lower ends of the two fixing frames, rotating pieces are rotationally installed at the front end and the rear end of the interior of the electroplating cylinder correspondingly, and a dispersing mechanism used for dispersing pressing rivet nuts is installed between the two rotating pieces. The rotating piece is connected with the driving piece, the rotating piece can enable the rotating direction of the dispersing mechanism to be opposite to the rotating direction of the electroplating barrel, and the dispersing mechanism can swing back and forth during rotation, so that the pressing rivet nuts form turbulent flow in the electroplating barrel, the gathering of the pressing rivet nuts is reduced, and the nuts are dispersed more uniformly; the uniformity of a plating layer on the surface of the pressing rivet nut is improved, and product bonding is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coating, and in particular to a surface coating device for producing rivet nuts. Background Art

[0002] In order to ensure the corrosion resistance, strength and aesthetics of the riveted nuts, their surfaces are usually plated, including zinc plating, chrome plating, nickel plating and chemical plating. Chemical plating is a layer of chemical substances quenched on the surface of stainless steel nuts to form a uniform film, thereby enhancing its corrosion resistance and hardness, and improving product quality and service life.

[0003] At present, during the plating process, a certain number of rivet nuts are generally placed in a plating cylinder, and the plating cylinder is placed in a plating tank, so that the plating solution enters the interior through the filter holes on the surface of the plating cylinder and contacts the rivet nuts, thereby electroplating them.

[0004] During long-term use of the electroplating solution, there are a lot of impurities in the electroplating solution, such as iron ions, organic matter, etc., which will cause gelation and increase the viscosity. The rivet nuts will adhere to the inner wall of the electroplating tube when rolling inside the electroplating tube. At the same time, the rivet nuts will stick to each other or fit together, which will cause part of the rivet nut surface to be blocked and unable to directly contact the electroplating solution. In addition, the multiple rivet nuts inside are gathered together, which will also make it impossible for the rivet nuts inside to better contact the electroplating solution, resulting in incomplete plating of the rivet nuts, and may cause the grooves on the surface of the electroplating tube to be clogged, resulting in reduced exchange of internal and external electroplating solutions, resulting in reduced plating effect. To this end, we designed a surface coating device for the production of rivet nuts. Summary of the invention

[0005] The present invention provides a surface coating device for producing self-clinching nuts, which solves the above-mentioned problem.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A surface coating device for producing rivet nuts, comprising an electroplating tank, a liquid inlet pipe is installed on the left surface of the electroplating tank, a water pump is connected to the end of the liquid inlet pipe away from the electroplating tank, the water inlet end of the water pump is connected to an external liquid storage tank through a pipeline, and a liquid discharge valve is also installed on the left side of the electroplating tank; A fixed frame is placed at the front and rear ends of the electroplating tank respectively, a plurality of straight rods are fixed between the two fixed frames, a plating cylinder is rotatably installed between the two fixed frames through a bearing, the plating cylinder is connected to a driving member, a cleaning mechanism for clearing blockage of the plating cylinder is installed in the middle of the lower ends of the two fixed frames, a rotating member is rotatably installed at the front and rear ends of the electroplating cylinder respectively, a dispersing mechanism for dispersing the rivet nuts is installed between the two rotating members, and the front and rear ends of the rotating member are respectively connected to the driving member.

[0007] Preferably, the electroplating cylinder includes a placing cylinder with a regular hexagonal structure, a placing opening with a rectangular structure is opened at the top of the placing cylinder, a cylinder plate is installed in the placing opening, a plurality of liquid inlets which are horizontally and evenly spaced are opened on the surfaces of the cylinder plate and the placing cylinder, a side plate is fixed to the front and rear ends of the placing cylinder respectively, a fixing sleeve is welded on the outward side of the side plate, the fixing sleeve is rotatably connected to the fixing frame through a bearing, a strip plate is fixed to each of the four corners of the cylinder plate, the cylinder plate is placed in the placing opening, the strip plate contacts the outer surface of the placing cylinder and is fixed by bolts, so that the cylinder plate can be installed on the placing cylinder, and the inner surface of the cylinder plate is flush with the top of the inner wall of the placing cylinder.

[0008] Preferably, the driving member includes a driving gear installed on the outside of the side plate, the driving gear fixed sleeve is connected to the fixed sleeve, and a connecting shaft is rotatably installed between the two fixed frames and above the electroplating cylinder through a bearing, a main gear is respectively installed at the front and rear ends of the connecting shaft, and the two main gears are respectively meshed with two driving gears, a pulley is installed at the front end of the connecting shaft, and a driving motor is installed on the front fixed frame through a frame, and the output shaft of the driving motor is connected to the connecting shaft through a pulley and a belt, and the rotation of the driving motor can rotate the connecting shaft, and then the front and rear main gears can be rotated, and the rotation of the two main gears can be synchronously rotated using the two driving gears below, so that the electroplating cylinder can rotate about the axis of the fixed sleeve.

[0009] Preferably, the cleaning mechanism comprises a bottom plate fixed to the bottom end of the inner side surface of the fixing frame, two upright posts are fixed to each of the bottom plates, a horizontal plate is slidably sleeved between the four upright posts, a plurality of cleaning rods distributed at equal intervals are arranged on the horizontal plate, the cleaning rods slide up and down and extend into the liquid inlet, and the top end of the cleaning rods is flush with the inner wall of the placement tube; A lifting block is fixed to the front and rear ends of the horizontal plate respectively, and a lifting spring is sleeved on the column. The upper and lower ends of the lifting spring are respectively connected to the horizontal plate and the bottom plate. The top of the lifting block is in sliding contact with the surface of the side plate. The position and number of the cleaning rods correspond to the position and number of the liquid inlet on one side of the placement tube. When the placement tube rotates, the cleaning rod can scrape the inner wall of the liquid inlet to prevent it from being blocked, thereby improving the exchange of electroplating liquid inside and outside the placement tube and improving the effect of the surface coating of the rivet nut.

[0010] Preferably, the side plate is in a hexagonal structure, and the side surface of the side plate is provided with six groups of evenly distributed lifting parts, the lifting parts and the side plate surface are chamfered to form an inclined surface, and the lifting block is in sliding contact with the side surface of the lifting part; When the electroplating cylinder rotates clockwise, when the lifting block just contacts the inclined surface on the left, the cleaning rod will gradually separate from the liquid inlet. When the lifting block contacts the lifting part, the cleaning rod is below the outer surface of the placement cylinder, and the two will not contact. When the lifting block will contact the inclined surface on the right, the cleaning rod will move upward under the action of the lifting spring and gradually extend into the liquid inlet to clean it. When the lifting block contacts the surface of the side plate, the cleaning rod is in the liquid inlet and the top of the cleaning rod is flush with the inner wall of the placement tube.

[0011] Preferably, circular grooves are provided on the inner sides of the two side plates, and the rear fixed sleeve is penetrated front and back to form a circular opening, and the circular opening is connected to the circular groove, and the rotating member includes rotating disks rotatably installed in the two circular grooves respectively, and a rotating column is welded at the middle of the outer side of the rear rotating disk, the rotating column is rotatably connected to the rear fixed sleeve through a bearing, and one end of the rotating column passes through the rear fixed frame and is placed outside it, the rotating column is connected to the connecting shaft through a belt and a pulley, and three groups of annularly distributed fixed guide rods are fixed between the front and rear rotating disks, and the driving motor can connect the shaft, the pulley and the belt to rotate the rotating column, and then the two rotating disks can rotate, and the rotation direction of the rotating disk is opposite to the rotation direction of the electroplating cylinder.

[0012] Preferably, the dispersing mechanism comprises a fitting groove opened on the inner side of the two side plates, and the fitting groove is a regular hexagonal structure, and the size of the fitting groove is set in proportion to the size of the placement tube; Three groups of annularly distributed lifting guide rods are slidably arranged between the two fitting grooves, and a fixed slider is slidably sleeved on each of the lifting guide rods. A dispersion plate is welded to the end of the fixed slider away from the fixed guide rod. The dispersion plate is tilted, and a scraper plate is fixed to the end of multiple dispersion plates away from the fixed slider. The scraper plate is in sliding contact with the inner wall of the placement cylinder. A telescopic part is arranged on the end of the fixed slider close to the fixed guide rod. The dispersion plate can stir the rivet nuts inside the electroplating cylinder when it rotates, so that the rivet nuts are dispersed, thereby improving the contact effect between the rivet nuts and the plating solution.

[0013] Preferably, a fixed shaft is fixed at the center of the side panel on the front side, and the front and rear ends of the fixed shaft are respectively rotatably connected to the two rotating disks. A plurality of groups of linearly distributed reciprocating grooves are provided on the fixed shaft, and the telescopic parts are slidably connected to the reciprocating grooves. When the side panel rotates, the fixed shaft can rotate together, and the rotation direction of the fixed shaft is opposite to the rotation direction of the rotating disk.

[0014] Preferably, each group of the reciprocating grooves includes two moving grooves, the moving grooves are composed of two arc-shaped grooves, and the cross-section of the moving grooves is an elliptical structure; The telescopic member comprises a mounting sleeve slidably sleeved on a fixed guide rod, a moving rod is slidably sleeved up and down inside one end of the mounting sleeve close to the dispersion plate, the other end of the moving rod is fixed to the dispersion plate, a fixed rod is fixed to the other end of the mounting sleeve, and the other ends of the two fixed rods are respectively slidably placed in two moving grooves of the same set of reciprocating grooves; When the fixed guide rod rotates with the rotating part, the fixed guide rod can make the telescopic part rotate together, the fixed rod in the telescopic part can rotate along the surface of the fixed axis, and the fixed rod can move back and forth when sliding along the moving groove, that is, the telescopic part can move back and forth, so that the dispersion plate can move back and forth together, and the scraper plate can always move in close contact with the inner wall of the placement cylinder during the rotation process, and the dispersion plate can move back and forth, so that the internal riveted nuts can be dispersed.

[0015] Beneficial effects of the present invention: 1. By arranging a cleaning mechanism at the lower end of the electroplating cylinder, the cleaning rod on the cleaning mechanism can be inserted into the liquid inlet of the electroplating cylinder, so that the inner wall of the liquid inlet can be cleaned to prevent impurities from blocking it, facilitating the exchange of electroplating liquid inside and outside the electroplating cylinder, and improving the electroplating effect; 2. By arranging a rotating part and a dispersing mechanism in the electroplating cylinder, the rotating part is connected to the driving part, and the rotating part can make the dispersing mechanism rotate in the opposite direction to the rotation direction of the electroplating cylinder, and the dispersing mechanism can swing back and forth when rotating, so that the rivet nut forms turbulence in the electroplating cylinder, and the rivet nut is pushed back and forth by the dispersing plate to disperse, reducing the aggregation of the rivet nut, so that the nut is dispersed more evenly, and the scraper plate can scrape the attachments on the inner wall of the electroplating cylinder to prevent multiple rivet nuts from sticking to each other, or the rivet nuts from sticking to the inner wall of the electroplating cylinder to improve the uniformity of the surface coating of the rivet nut and reduce product sticking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a front and cross-sectional view of a surface coating device for producing self-clinching nuts proposed by the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the electroplating cylinder and the fixing frame; Figure 3 for Figure 2 Schematic cross-sectional view of ; Figure 4 for Figure 2 Schematic diagram of the internal structure of the electroplating cylinder; Figure 5 for Figure 2 Schematic diagram of the structure of the electroplating cylinder; Figure 6 for Figure 5Structural diagram of the cleaning mechanism, rotating parts and dispersing mechanism; Figure 7 for Figure 6 A partial enlarged schematic diagram; Figure 8 for Figure 6 Schematic diagram of the structure of the fixed shaft; Fig. 9 for Figure 6 Schematic diagram of the structure of the decentralized mechanism; Fig.10 It is a cross-sectional view of the fixed shaft and side plates, rotating parts and rotating columns.

[0017] Numbers in the figure: 1, electroplating tank; 11, drain valve; 2, water pump; 21, liquid inlet pipe; 3, fixed frame; 4, electroplating cylinder; 41, placement cylinder; 411, liquid inlet; 412, placement port; 42, cylinder plate; 43, side plate; 431, lifting part; 432, fitting groove; 44, fixing sleeve; 5, driving motor; 51, driving gear; 52, main gear; 53, connecting shaft; 531, pulley; 6, cleaning mechanism; 61, bottom Plate; 62, lifting spring; 63, column; 64, cross plate; 65, cleaning rod; 66, lifting block; 7, rotating member; 71, rotating disk; 72, rotating column; 73, fixed guide rod; 8, dispersion mechanism; 81, dispersion plate; 811, scraper plate; 82, fixed slider; 83, lifting guide rod; 84, telescopic member; 841, fixed rod; 842, mounting sleeve; 843, moving rod; 85, fixed shaft; 851, moving groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1 - Fig.10 A surface coating device for producing rivet nuts includes an electroplating tank 1, a liquid inlet pipe 21 is installed on the left surface of the electroplating tank 1, a water pump 2 is connected to the end of the liquid inlet pipe 21 away from the electroplating tank 1, the water inlet end of the water pump 2 is connected to an external liquid storage tank through a pipeline, and a drain valve 11 is also installed on the left side of the electroplating tank 1; A fixing frame 3 is placed at the front and rear ends of the electroplating tank 1 respectively, a plurality of straight rods are fixed between the two fixing frames 3, a plating cylinder 4 is rotatably installed between the two fixing frames 3 through a bearing, the plating cylinder 4 is connected to a driving member, a cleaning mechanism 6 for clearing blockage of the plating cylinder 4 is installed in the middle of the lower ends of the two fixing frames 3, a rotating member 7 is rotatably installed at the front and rear ends of the electroplating cylinder 4 respectively, a dispersing mechanism 8 for dispersing the rivet nuts is installed between the two rotating members 7, and the front and rear ends of the rotating member 7 are respectively connected to the driving member.

[0020] The electroplating cylinder 4 includes a placing cylinder 41 with a regular hexagonal structure, a placing opening 412 with a rectangular structure is opened at the top of the placing cylinder 41, a cylinder plate 42 is installed in the placing opening 412, and a plurality of transverse and evenly spaced liquid inlets 411 are opened on the surfaces of the cylinder plate 42 and the placing cylinder 41, a side plate 43 is fixed to the front and rear ends of the placing cylinder 41 respectively, a fixing sleeve 44 is welded to the outward side of the side plate 43, the fixing sleeve 44 is rotatably connected to the fixing frame 3 through a bearing, a strip plate is fixed to each of the four corners of the cylinder plate 42, the cylinder plate 42 is placed in the placing opening 412, and the strip plate contacts the outer surface of the placing cylinder 41 and is fixed by bolts, so that the cylinder plate 42 can be installed on the placing cylinder 41, and the inner surface of the cylinder plate 42 is flush with the top of the inner wall of the placing cylinder 41.

[0021] The driving member includes a driving gear 51 installed on the outside of the side plate 43, and the driving gear 51 is fixedly sleeved on the fixed sleeve 44. A connecting shaft 53 is rotatably installed between the two fixed frames 3 above the electroplating cylinder 4 through a bearing. A main gear 52 is respectively installed at the front and rear ends of the connecting shaft 53. The two main gears 52 are respectively meshed with the two driving gears 51. A pulley 531 is installed at the front end of the connecting shaft 53. A driving motor 5 is installed on the front fixed frame 3 through a frame. The output shaft of the driving motor 5 is connected to the connecting shaft 53 through a pulley 531 and a belt. The rotation of the driving motor 5 can rotate the connecting shaft 53, and then the front and rear main gears 52 can be rotated. The rotation of the two main gears 52 can be synchronously rotated using the two driving gears 51 below, so that the electroplating cylinder 4 can rotate about the axis of the fixed sleeve 44.

[0022] Reference Figure 4-Figure 7 The cleaning mechanism 6 includes a bottom plate 61 fixed to the bottom end of the inner side surface of the fixing frame 3, two upright posts 63 are fixed to each bottom plate 61, a horizontal plate 64 is slidably sleeved between the four upright posts 63, and a plurality of cleaning rods 65 distributed at equal intervals are arranged on the horizontal plate 64. The cleaning rods 65 slide up and down and extend into the liquid inlet 411, and the top of the cleaning rod 65 is flush with the inner wall of the placement tube 41; A lifting block 66 is fixed to the front and rear ends of the horizontal plate 64 respectively, and a lifting spring 62 is sleeved on the column 63. The upper and lower ends of the lifting spring 62 are respectively connected to the horizontal plate 64 and the bottom plate 61. The top of the lifting block 66 is in sliding contact with the surface of the side plate 43. The position and number of the cleaning rods 65 correspond to the position and number of the liquid inlet 411 on one side of the placement tube 41. When the placement tube 41 rotates, the cleaning rod 65 can scrape the inner wall of the liquid inlet 411 to prevent it from being blocked, thereby improving the exchange of the electroplating solution inside and outside the placement tube 41 and improving the effect of the surface coating of the rivet nut.

[0023] The side plate 43 is in a hexagonal structure, and six groups of evenly distributed lifting parts 431 are arranged on the side surface of the side plate 43. The lifting parts 431 and the side plate 43 are chamfered to form an inclined surface. The lifting block 66 is in sliding contact with the side surface of the lifting part 431. When the electroplating cylinder 4 rotates, the side plate 43 can rotate with it. When the side plate 43 rotates, it will abut against the lifting block 66, so that the cross plate 64 and the cleaning rod 65 can move up and down accordingly. When the lifting block 66 contacts the side surface of the side plate 43, the cleaning rod 65 can extend into the liquid inlet 411 to prevent it from being blocked. When the electroplating cylinder 4 rotates clockwise, when the lifting block 66 first contacts the inclined surface on the left side, the cleaning rod 65 will gradually break away from the contact with the inner end of the liquid inlet 411, and the lifting block 66 makes the horizontal plate 64 move downward and break away from the liquid inlet 411. After that, when the lifting block 66 contacts the lifting part 431, the cleaning rod 65 is below the outer surface of the placement cylinder 41, and the two will not contact each other, so that the placement cylinder 41 can be fully rotated; Afterwards, the lifting block 66 will contact the inclined surface on the right side. At this time, the cleaning rod 65 moves upward under the action of the lifting spring 62, and gradually extends into the liquid inlet 411 to clean it. When the lifting block 66 contacts the surface of the side plate 43, the cleaning rod 65 is in the liquid inlet 411, and the top of the cleaning rod 65 is flush with the inner wall of the placement tube 41.

[0024] A circular groove is provided on the inner side of the two side plates 43, and a circular opening is formed through the front and rear of the rear fixing sleeve 44, and the circular opening is connected to the circular groove. The rotating member 7 includes a rotating disk 71 rotatably installed in the two circular grooves, and a rotating column 72 is welded at the middle of the outer side of the rotating disk 71 on the rear side. The rotating column 72 is rotatably connected to the rear fixing sleeve 44 through a bearing, and one end of the rotating column 72 passes through the rear fixing frame 3 and is placed outside it. The rotating column 72 is connected to the connecting shaft 53 through a belt and a pulley 531, and the front and rear rotating disks 71 are fixed between them. There are three groups of annularly distributed fixed guide rods 73, and the cross-section of the fixed guide rods 73 is a hexagonal structure. The driving motor 5 can connect the shaft 53, the pulley 531 and the belt to rotate the rotating column 72, and then the two rotating disks 71 can rotate, wherein the rotation directions of the connecting shaft 53, the rotating column 72 and the rotating disk 71 are the same, and the electroplating cylinder 4 is driven by the driving gear 51, and the direction of rotation of the driving gear 51 is opposite to that of the connecting shaft 53, which makes the rotation direction of the rotating disk 71 opposite to that of the electroplating cylinder 4.

[0025] Reference Figure 4-Figure 10 The dispersing mechanism 8 includes a fitting groove 432 provided on the inner side of the two side plates 43, and the fitting groove 432 is a regular hexagonal structure, and the size of the fitting groove 432 is proportional to the size of the placement tube 41; Three groups of annularly distributed lifting guide rods 83 are slidably arranged between the two fitting grooves 432, and a fixed slider 82 is slidably sleeved on each lifting guide rod 83. A dispersion plate 81 is welded to the end of the fixed slider 82 away from the fixed guide rod 73. The dispersion plate 81 is tilted, and the scraper plate 811 is in sliding contact with the inner wall of the placement cylinder 41. A telescopic part 84 is arranged on the end of the fixed slider 82 close to the fixed guide rod 73. The dispersion plate 81 can stir the rivet nuts inside the electroplating cylinder 4 when rotating, so that the rivet nuts are dispersed, thereby improving the contact effect between the rivet nuts and the plating solution.

[0026] A fixed shaft 85 is fixed at the center of the front side plate 43. The front and rear ends of the fixed shaft 85 are rotatably connected to the two rotating disks 71 respectively. The fixed shaft 85 is provided with a plurality of sets of linearly distributed reciprocating grooves. The telescopic member 84 is slidably connected to the reciprocating grooves. When the side plate 43 rotates, the fixed shaft 85 can rotate together, and the rotation direction of the fixed shaft 85 is opposite to that of the rotating disk 71. A circular hole is formed on the side plate 43 at the front side, and a circular groove is formed on the side plate 43 at the rear side. The circular groove does not penetrate the two side surfaces of the side plate 43 at the rear side. The fixed shaft 85 is placed in the circular hole and the circular groove, and the rear end of the fixed shaft 85 is rotatably connected to the circular groove through a bearing, while the front end of the fixed shaft 85 passes through the circular hole and is fixed to the side plate 43 at the front side, and the front end of the fixed shaft 85 is rotatably connected to the circular hole through a bearing. When the fixed guide rod 73 rotates with the rotating disk 71, it can make the telescopic part 84, the lifting guide rod 83 and the dispersion plate 81 rotate together with the axis of the fixed shaft 85 as the rotation center, and the rotation direction of the fixed guide rod 73 is opposite to the rotation direction of the fixed shaft 85. The lifting guide rod 83 can rotate along the inside of the bonding groove 432. Since the rotation trajectory of the fixed guide rod 73 is a circular structure, and the bonding groove 432 and the placement tube 41 are regular hexagonal structures, the lifting guide rod 83 will be displaced to a certain extent along the bonding groove 432, thereby ensuring that the scraper plate 811 is always in contact with the inner wall of the placement tube 41, so as to scrape off the sticky substances attached to its surface.

[0027] Each set of reciprocating grooves includes two moving grooves 851, and the moving grooves 851 are composed of two arc grooves, and the cross section of the moving grooves 851 is an elliptical structure; The telescopic member 84 includes a mounting sleeve 842 slidably sleeved on the fixed guide rod 73, a moving rod 843 is slidably sleeved up and down inside one end of the mounting sleeve 842 close to the dispersion plate 81, the other end of the moving rod 843 is fixed to the dispersion plate 81, and a fixed rod 841 is fixed to the other end of the mounting sleeve 842, and the other ends of the two fixed rods 841 are respectively slidably placed in two moving grooves 851 of the same set of reciprocating grooves; The mounting sleeve 842 is welded with a hanging ear, and a hexagonal sleeve is formed through the front and back of the hanging ear. The size of the sleeve is consistent with the size of the fixed guide rod 73. The mounting sleeve 842 is connected to the fixed guide rod 73 by sliding forward and backward through the hanging ear. The hexagonal sleeve and the fixed guide rod 73 can limit the rotation of the telescopic member 84, so that it can only rotate with the fixed guide rod 73. When the fixed guide rod 73 rotates with the rotating member 7, the fixed guide rod 73 can make the telescopic member 84 rotate together, and the fixed rod 841 in the telescopic member 84 can rotate along the surface of the fixed shaft 85, and the fixed rod 841 can move back and forth when sliding along the moving groove 851, that is, the telescopic member 84 can move back and forth, so that the dispersion plate 81 can move back and forth together, and the scraper plate 811 can always move in contact with the inner wall of the placement tube 41 during the rotation process, and the dispersion plate 81 can move back and forth, and the dispersion plate 81 that moves back and forth can make the rivet nuts be pushed back and forth to disperse, and when the dispersion plate 81 rotates, since it is in an inclined state, it can also make part of the rivet nuts be lifted, and then slide down under the action of its own gravity, so that the internal rivet nuts can be dispersed, thereby improving the contact effect between the rivet nuts and the electroplating solution.

[0028] Working principle: In actual use, first open the cylinder plate 42 on the electroplating cylinder 4, then place a plurality of rivet nuts to be plated into the electroplating cylinder 4, then clamp the cylinder plate 42 into the placement opening 412, and fix it with strips and bolts, and then use the hoisting equipment to connect it with the fixing frame 3, so that the electroplating cylinder 4 is placed in the electroplating tank 1 filled with electroplating liquid for electroplating operation; During the electroplating process, the power of the driving motor 5 is turned on to make it rotate at a low speed. The driving motor 5 will rotate the connecting shaft 53 and the main gear 52 through the belt and the pulley 531. The two main gears 52 will rotate the two driving gears 51 at the front and rear ends of the electroplating cylinder 4, thereby causing the entire electroplating cylinder 4 to rotate. During the rotation of the electroplating cylinder 4, the rivet nut inside it will roll up and down, and the external electroplating liquid can enter the interior through the liquid inlet 411 and contact with the rivet nut to plate its surface; Since the rear end of the connecting shaft 53 is connected to the rotating column 72 at the rear end through the pulley 531 and the belt, the rotating column 72 will cause the rotating disk 71 at the rear side to rotate, and the front and rear rotating disks 71 are connected by three fixed guide rods 73, so that the front and rear rotating disks 71 will rotate synchronously, and the dispersion mechanism 8 installed on the fixed guide rods 73 will rotate together, and its rotation direction is opposite to that of the electroplating cylinder 4; When the dispersion mechanism 8 is rotating, the telescopic member 84, the lifting guide rod 83, the dispersion plate 81 and the scraper plate 811 can rotate together, the lifting guide rod 83 can move along the inside of the fitting groove 432, so as to ensure that the scraper plate 811 is always in contact with the inner wall of the placement tube 41, the fixed rod 841 in the telescopic member 84 can rotate along the surface of the fixed shaft 85, and the fixed rod 841 can move back and forth when sliding along the moving groove 851, that is, the telescopic member 84 can move back and forth, so that the dispersion plate 81 can move back and forth together, and the scraper plate 811 can always move in contact with the inner wall of the placement tube 41 during the rotation process, and the dispersion plate 81 can move back and forth, so that the rivet nut forms turbulence in the electroplating tube 4, reducing the aggregation of the rivet nut, so that the nut is dispersed more evenly, so as to improve the uniformity of the surface coating of the rivet nut and reduce product sticking; When the electroplating cylinder 4 rotates, the two side plates 43 at the front and rear thereof rotate together, and the side plates 43 will abut against the lifting block 66 when rotating, so that the horizontal plate 64 and the cleaning rod 65 can move up and down accordingly. When the lifting block 66 contacts the side surface of the side plate 43, the cleaning rod 65 can extend into the liquid inlet 411 to prevent it from being blocked; When the electroplating cylinder 4 rotates clockwise, when the lifting block 66 first contacts the inclined surface on the left side, the cleaning rod 65 at this time has not yet contacted the left and right inner ends of the liquid inlet 411, and the lifting block 66 causes the cross plate 64 to move downward and away from the liquid inlet 411. Then, when the lifting block 66 contacts the lifting portion 431, the cleaning rod 65 is below the outer surface of the placement cylinder 41, and the two will not contact, so that the placement cylinder 41 can rotate completely. Then, the lifting block 66 will contact the inclined surface on the right side. At this time, the cleaning rod 65 moves upward under the action of the lifting spring 62, and gradually extends into the liquid inlet 411 to clean it to prevent it from being blocked, which is convenient for the exchange of electroplating liquid inside and outside the electroplating cylinder 4 and improves the electroplating effect. After the electroplating is completed, the electroplating cylinder 4 is lifted out using a lifting device, and the cylinder plate 42 is opened to remove the rivet nut.

[0029] By arranging a cleaning mechanism 6 at the lower end of the electroplating cylinder 4, the cleaning rod 65 on the cleaning mechanism 6 can be inserted into the liquid inlet 411 of the electroplating cylinder 4, so that the inner wall of the liquid inlet 411 can be cleaned to prevent impurities from blocking it, which facilitates the exchange of electroplating liquid inside and outside the electroplating cylinder 4 and improves the electroplating effect; By arranging a rotating member 7 and a dispersing mechanism 8 in the electroplating cylinder 4, the rotating member 7 is connected to the driving member, and the rotating member 7 can make the dispersing mechanism 8 rotate in the opposite direction to the rotation direction of the electroplating cylinder 4, and the dispersing mechanism 8 can swing back and forth when rotating, so that the rivet nuts form turbulence in the electroplating cylinder 4, reducing the aggregation of the rivet nuts, so that the nuts are dispersed more evenly, and the scraper plate 811 arranged can scrape off the attachments on the inner wall of the electroplating cylinder 4, preventing multiple rivet nuts from sticking to each other, or the rivet nuts from sticking to the inner wall of the electroplating cylinder 4, so as to improve the uniformity of the surface coating of the rivet nuts and reduce product adhesion.

[0030] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A surface coating device for producing self-clinching nuts, characterized in that: It comprises an electroplating tank (1), a liquid inlet pipe (21) is installed on the left surface of the electroplating tank (1), the end of the liquid inlet pipe (21) away from the electroplating tank (1) is connected to a water pump (2), the water inlet end of the water pump (2) is connected to an external liquid storage tank through a pipeline, and a liquid discharge valve (11) is also installed on the left side of the electroplating tank (1); A fixing frame (3) is placed at the front and rear ends of the electroplating tank (1), a plurality of straight rods are fixed between the two fixing frames (3), a plating cylinder (4) is rotatably mounted between the two fixing frames (3) via a bearing, the plating cylinder (4) is connected to a driving member, a cleaning mechanism (6) for clearing blockage of the plating cylinder (4) is mounted in the middle of the lower ends of the two fixing frames (3), a rotating member (7) is rotatably mounted at the front and rear ends of the electroplating cylinder (4), a dispersing mechanism (8) for dispersing the rivet nuts is mounted between the two rotating members (7), and the front and rear ends of the rotating member (7) are respectively connected to the driving member.

2. A surface coating device for producing self-clinching nuts according to claim 1, characterized in that: The electroplating cylinder (4) comprises a placement cylinder (41) of a regular hexagonal structure, a placement opening (412) of a rectangular structure is provided at the top of the placement cylinder (41), a cylinder plate (42) is installed in the placement opening (412), a plurality of liquid inlets (411) are provided on the surfaces of the cylinder plate (42) and the placement cylinder (41) at a horizontal and evenly spaced interval, a side plate (43) is fixed to each of the front and rear ends of the placement cylinder (41), a fixing sleeve (44) is welded to the outward side of the side plate (43), and the fixing sleeve (44) is rotatably connected to the fixing frame (3) via a bearing.

3. A surface coating device for producing self-clinching nuts according to claim 2, characterized in that: The driving member comprises a driving gear (51) mounted on the outside of the side plate (43), the driving gear (51) being fixedly sleeved on the fixing sleeve (44), a connecting shaft (53) being rotatably mounted between the two fixing frames (3) above the electroplating cylinder (4) via a bearing, a main gear (52) being mounted on the front and rear ends of the connecting shaft (53), the two main gears (52) being respectively meshed with the two driving gears (51), a pulley (531) being mounted on the front end of the connecting shaft (53), a driving motor (5) being mounted on the fixing frame (3) on the front side via a frame, and an output shaft of the driving motor (5) being connected to the connecting shaft (53) via a pulley (531) and a belt.

4. A surface coating device for producing self-clinching nuts according to claim 2, characterized in that: The cleaning mechanism (6) comprises a bottom plate (61) fixed to the bottom end of the inner side surface of the fixing frame (3), two upright posts (63) are fixed to each of the bottom plates (61), a horizontal plate (64) is slidably sleeved between the four upright posts (63), a plurality of cleaning rods (65) distributed at equal intervals are arranged on the horizontal plate (64), the cleaning rods (65) slide up and down and extend into the liquid inlet (411), and the top ends of the cleaning rods (65) are flush with the inner wall of the placement tube (41); A lifting block (66) is fixed to the front and rear ends of the transverse plate (64), respectively; a lifting spring (62) is sleeved on the upright column (63); the upper and lower ends of the lifting spring (62) are respectively connected to the transverse plate (64) and the bottom plate (61); and the top end of the lifting block (66) is in sliding contact with the surface of the side plate (43).

5. A surface coating device for producing self-clinching nuts according to claim 4, characterized in that: The side plate (43) has a hexagonal structure, and the side surface of the side plate (43) is provided with six groups of evenly distributed lifting portions (431). The lifting portions (431) and the surface of the side plate (43) are chamfered to form an inclined surface, and the lifting block (66) is in sliding contact with the side surface of the lifting portion (431).

6. A surface coating device for producing self-clinching nuts according to claim 3, characterized in that: A circular groove is formed on the inner side of the two side plates (43); a circular opening is formed through the rear fixing sleeve (44) at the front and rear sides, and the circular opening is communicated with the circular groove; the rotating member (7) comprises rotating disks (71) respectively rotatably mounted in the two circular grooves; a rotating column (72) is welded to the middle of the outer side of the rear rotating disk (71); the rotating column (72) is rotatably connected to the rear fixing sleeve (44) via a bearing; one end of the rotating column (72) passes through the rear fixing frame (3) and is placed outside the rear fixing frame (3); the rotating column (72) is connected to the connecting shaft (53) via a belt and a pulley (531); and three groups of annularly distributed fixed guide rods (73) are fixed between the front and rear rotating disks (71).

7. A surface coating device for producing self-clinching nuts according to claim 6, characterized in that: The dispersing mechanism (8) comprises a fitting groove (432) provided on the inner side of the two side plates (43), and the fitting groove (432) is in a regular hexagonal structure, and the size of the fitting groove (432) is set in proportion to the size of the placement tube (41); Three groups of annularly distributed lifting guide rods (83) are slidably arranged between the two fitting grooves (432), and a fixed slider (82) is slidably sleeved on each of the lifting guide rods (83) in a forward and backward manner. A dispersion plate (81) is welded to one end of the fixed slider (82) away from the fixed guide rod (73), and the dispersion plate (81) is designed to be inclined. A scraping plate (811) is fixed to one end of the plurality of dispersion plates (81) away from the fixed slider (82), and the scraping plate (811) is in sliding contact with the inner wall of the placement tube (41). A telescopic member (84) is arranged at one end of the fixed slider (82) close to the fixed guide rod (73).

8. A surface coating device for producing self-clinching nuts according to claim 7, characterized in that: A fixed shaft (85) is fixed at the center of the side plate (43) on the front side. The front and rear ends of the fixed shaft (85) are rotatably connected to the two rotating disks (71) respectively. The fixed shaft (85) is provided with a plurality of groups of linearly distributed reciprocating grooves, and the telescopic member (84) is slidably connected to the reciprocating grooves.

9. A surface coating device for producing self-clinching nuts according to claim 8, characterized in that: Each group of the reciprocating grooves comprises two moving grooves (851), the moving grooves (851) are composed of two arc-shaped grooves, and the cross-section of the moving grooves (851) is an elliptical structure; The telescopic member (84) comprises a mounting sleeve (842) slidably sleeved on the fixed guide rod (73); a moving rod (843) is slidably sleeved up and down inside one end of the mounting sleeve (842) close to the dispersion plate (81); the other end of the moving rod (843) is fixed to the dispersion plate (81); a fixed rod (841) is fixed to the other end of the mounting sleeve (842); and the other ends of the two fixed rods (841) are respectively slidably placed in two moving grooves (851) of the same set of reciprocating grooves.

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