Precision machining metal nut surface paint spraying device

Abstract

The invention belongs to the technical field of paint spraying devices, and particularly relates to a precision machining metal nut surface paint spraying device which comprises a box body, and a lateral nozzle and a vertical nozzle are installed in the box body; the limiting mechanism comprises a limiting plate installed on the box body, and a clamping assembly is arranged on the limiting plate; and the lifting mechanism comprises a lifting plate which is installed on the box body in a sliding mode in the vertical direction, a limiting shaft is rotatably installed on the lifting plate, and external threads are formed in the upper end of the limiting shaft. A limiting shaft can rotate forwards and backwards along a lifting plate while the lifting plate moves up and down along a box body, so that the limiting shaft drives a nut to spirally ascend or descend through an external thread, and paint mist sprayed out of a lateral nozzle conveniently covers the upper end and the lower end of the nut and different positions of the outer side surface of the nut; and paint spraying can be conveniently conducted on inner ring threads of the nut, and therefore paint spraying convenience is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of paint spraying devices, and in particular relates to a paint spraying device for precision-processing the surface of a metal nut. Background Art

[0002] Metal nuts are widely used in precision parts, working in conjunction with bolts to connect two or more components and ensure structural stability. Metal nuts are often painted using a spray paint system to prevent moisture and oxygen from reaching the metal base of the nut, thereby slowing down rust.

[0003] Chinese Patent Publication No. CN218251048U discloses a device for spraying paint on the surface of precision-machined metal nuts, comprising a spraying machine housing, a fixing mechanism, and a positioning mechanism. The fixing mechanism comprises a fixing rod and a fixing ring, which are used to fix the nut and drive the nut to rotate so that different positions of the nut's circumferential surface face the nozzle, facilitating uniform spraying. However, the nut only rotates without moving axially, so the relative position between the nozzle and the nut remains unchanged. Due to the nut's own volume, the paint mist sprayed from the nozzle has difficulty covering both ends of the nut. Furthermore, due to the presence of the fixing rod and fixing ring on the inside of the nut, the inner threads of the nut cannot be painted, making the painting process inconvenient. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for spraying paint on the surface of precision-machined metal nuts, which can move up and down along the box body through the lifting plate while the limit shaft rotates forward and backward along the lifting plate, so that the limit shaft drives the nut to spiral up or down through the external thread. Compared with the existing technology, it is convenient for the paint mist sprayed by the side nozzle to cover the upper and lower ends of the nut and different positions on the outer surface of the nut, which is convenient for spraying paint on the inner ring thread of the nut, thereby improving the convenience of painting.

[0005] The technical solutions adopted by the present invention are as follows: A device for spraying paint on the surface of a precision-machined metal nut, comprising: A box body, wherein a lateral nozzle and a vertical nozzle are installed inside the box body; A limiting mechanism is provided on the box body, the limiting mechanism includes a limiting plate installed on the box body, the limiting plate is provided with a clamping assembly, and the clamping assembly includes two clamping plates respectively slidably installed on both sides of the limiting plate; A lifting mechanism is provided on the box body, comprising a lifting plate slidably mounted on the box body in a vertical direction, a limit shaft rotatably mounted on the lifting plate, the limit shaft being located on the inner side of the limit plate and below the vertical nozzle, and an external thread being provided on the upper end of the limit shaft; Among them, after the clamping plates slide along the limiting plate to adjust the distance between the clamping plates, after the lifting plate slides along the box body and the limiting shaft rotates along the lifting plate, the external thread spirally ascends or spirally descends.

[0006] As a preferred solution of the surface painting device for precision machining metal nuts of the present invention, wherein: a first motor is arranged at the lower end of the limiting shaft, the first motor is fixedly connected with the lifting plate, an output end of the first motor is fixedly connected with a sliding shaft, the sliding shaft is slidably connected with the limiting shaft in the vertical direction, and a spring is connected between the sliding shaft and the limiting shaft.

[0007] As a preferred solution of the surface painting device for precision machining metal nuts of the present invention, wherein: a lead screw is arranged on one side of the lifting plate, the lead screw is rotatably connected with the box body, a second motor is arranged at one end of the lead screw, an output end of the second motor is fixedly connected with the lead screw, the second motor is fixedly connected with the box body, a slider is drivingly connected to the lead screw, the slider is slidably connected with the box body in the vertical direction, and the lifting plate is fixedly connected with the slider.

[0008] As a preferred solution of the surface painting device for precision machining metal nuts of the present invention, wherein: a chute is opened at the lower end of the limiting shaft, a sliding strip is fixedly connected to the upper end of the sliding shaft, the sliding strip is slidably matched with the chute in the vertical direction, a retaining ring is arranged at the lower end of the chute, and the retaining ring is fixedly connected with the lower end of the limiting shaft.

[0009] As a preferred solution of the surface painting device for precision machining metal nuts of the present invention, wherein: the limiting plate includes a connecting plate rotatably installed on the box body, baffles are slidably installed on both sides of the connecting plate, and the clamping plates are slidably installed together with the baffles.

[0010] As a preferred solution of the surface painting device for precision machining metal nuts of the present invention, wherein: a third motor is fixedly connected to the box body, an output end of the third motor is fixedly connected with the connecting plate, the baffle is slidably connected with the connecting plate, first telescopic rods are fixedly connected to both sides of the connecting plate, an output end of the first telescopic rod is fixedly connected with the baffle, the clamping plate is slidably connected with the baffle, a second telescopic rod is fixedly connected to the baffle, and an output end of the second telescopic rod is fixedly connected with the clamping plate.

[0011] As a preferred solution of the surface painting device for precision machining metal nuts of the present invention, wherein: first guide rods are fixedly connected to both sides of the connecting plate, first sliding holes are opened on the baffle, the first sliding holes are slidably matched with the first guide rods, second guide rods are fixedly connected to the baffle, second sliding holes are opened on the clamping plate, and the second guide rods are slidably matched with the second sliding holes.

[0012] As a preferred solution of the surface painting device for precision machining metal nuts according to the present invention, wherein: the clamping assembly further includes a third telescopic rod fixedly connected to the clamping plate, the output end of the third telescopic rod is fixedly connected with a push plate, a stop block is arranged at one end of the clamping plate away from the push plate, and the stop block is fixedly connected with the limiting plate.

[0013] As a preferred solution of the surface painting device for precision machining metal nuts according to the present invention, wherein: a cleaning roller is arranged on the outer side of the limiting shaft, the cleaning roller is in rolling fit with the limiting shaft, and the cleaning roller is installed on the box body.

[0014] As a preferred solution of the surface painting device for precision machining metal nuts according to the present invention, wherein: an installation frame is fixedly connected to the box body, a connecting frame is slidably connected to the installation frame, the cleaning roller is rotatably connected to the connecting frame, a first limiting hole is formed in the installation frame, a plurality of second limiting holes are formed in the connecting frame, and a limiting pin is slidably connected inside the first limiting hole and the second limiting holes.

[0015] The technical effects achieved by the present invention are as follows: The present invention adopts the designs of the limiting mechanism and the lifting mechanism. While the lifting plate moves up and down along the box body, the limiting shaft rotates forward and backward along the lifting plate, so that the limiting shaft spirally rises or spirally descends. The limiting shaft drives the nut to spirally rise or spirally descend through the external thread, so that a relative position occurs between the nut and the side nozzle. Compared with the prior art, it is convenient for the paint mist ejected by the side nozzle to cover the upper and lower ends of the nut and different positions on the outer surface of the nut, thereby improving the convenience of painting. And after the limiting shaft spirally descends, since the limiting plate hinders the nut from continuing to move downward, the clamping plate slides along the limiting plate and then clamps and limits the nut, so that the limiting shaft and the external thread are separated from the nut, and there is no longer a limiting shaft and an external thread inside the nut, which is convenient for the paint mist ejected by the vertical nozzle to cover the internal thread of the nut. Compared with the prior art, it is convenient to paint the internal thread of the nut, thereby improving the convenience of painting; The present invention adopts the designs of the sliding shaft and the spring. The sliding connection between the sliding shaft and the limiting shaft can avoid the situation that the limiting shaft drives the external thread to jack up the nut. After the first motor works, it drives the limiting shaft to rotate through the sliding shaft. When the external thread on the limiting shaft is not aligned with the internal thread of the nut, although the limiting shaft still drives the external thread to rotate, at the same time, the limiting shaft moves downward relative to the sliding shaft, so that during the process of the limiting shaft driving the external thread to rotate and align with the internal thread of the nut, it is avoided that the limiting shaft drives the external thread to jack up the nut, which is convenient for the external thread to be screwed into the internal thread of the nut after alignment to achieve thread fit, thereby facilitating the subsequent spiral rising or spiral descending of the nut driven by the limiting shaft through the external thread; The present invention adopts the design of a push plate and a stop block. The push plate and the stop block can limit the position of the nut in the longitudinal direction. After the third telescopic rod works, the output end drives the push plate to move longitudinally. On the basis that the clamping plate limits the position of the nut in the transverse direction, it is convenient for the axis of the nut to be aligned with the axis of the limiting shaft in the vertical direction, so as to facilitate the limiting shaft to drive the external thread to screw into the internal thread of the nut. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the whole in the present invention; Figure 2 is a schematic cross-sectional view of the box body in the present invention; Figure 3 is a schematic structural diagram of the limiting mechanism and the lifting mechanism in the present invention; Figure 4 is a schematic structural diagram of the limiting mechanism at one angle in the present invention; Figure 5 is a schematic structural diagram of the limiting mechanism at another angle in the present invention; Figure 6 is a schematic structural diagram of the lifting mechanism and the cleaning roller in the present invention; Figure 7 is a schematic cross-sectional view of the limiting shaft and the sliding shaft in the present invention; Figure 8 is an exploded schematic diagram of the mounting bracket and the connecting bracket in the present invention.

[0017] In the drawings, the list of components represented by each reference numeral is as follows: 10. Box body; 11. Side nozzle; 12. Vertical nozzle; 20. Limiting mechanism; 21. Limiting plate; 22. Clamping assembly; 23. Clamping plate; 30. Lifting mechanism; 31. Lifting plate; 32. Limiting shaft; 33. External thread; 41. First motor; 42. Sliding shaft; 43. Spring; 44. Lead screw; 45. Second motor; 46. Slide block; 47. Slide groove; 48. Slide bar; 49. Retaining ring; 51. Connecting plate; 52. Baffle; 53. Third motor; 54. First telescopic rod; 55. Second telescopic rod; 56. First guide rod; 57. First sliding hole; 58. Second guide rod; 59. Second sliding hole; 61. Third telescopic rod; 62. Push plate; 63. Stop block; 71. Cleaning roller; 72. Mounting bracket; 73. Connecting bracket; 74. First limiting hole; 75. Second limiting hole; 76. Limiting pin. Detailed Embodiments

[0018] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0019] Embodiment 1 As shown Figures 1 to 6 in the figure, this is the first embodiment of the present invention. This Embodiment 1 provides a precision machining metal nut surface painting device, which includes a box body 10, and a lateral nozzle 11 and a vertical nozzle 12 are installed inside the box body 10; a limiting mechanism 20, the limiting mechanism 20 is arranged on the box body 10, the limiting mechanism 20 includes a limiting plate 21 installed on the box body 10, and a clamping component 22 is arranged on the limiting plate 21, and the clamping component 22 includes two clamping plates 23 respectively slidably installed on both sides of the limiting plate 21; a lifting mechanism 30, the lifting mechanism 30 is arranged on the box body 10, the lifting mechanism 30 includes a lifting plate 31 slidably installed on the box body 10 in the vertical direction, a limiting shaft 32 is rotatably installed on the lifting plate 31, the limiting shaft 32 is located inside the limiting plate 21, the limiting shaft 32 is located below the vertical nozzle 12, and an external thread 33 is provided at the upper end of the limiting shaft 32.

[0020] It should be noted that the present invention is used for painting nuts. The nuts are prior art. An inner ring thread is provided inside the nuts, and the inner ring thread is in threaded cooperation with the external thread 33. The inner ring thread and the external thread 33 have self-locking property, that is, the thread lead angle is less than the equivalent friction angle, which is used to maintain stability under static load and will not be elaborated here. A double-layer conveyor belt is arranged on the outer side of the box body 10. The double-layer conveyor belt is prior art. The double-layer conveyor belt includes upper and lower conveyor belts. The height position of the upper conveyor belt is higher than the height position of the limiting plate 21, which is used to convey nuts close to the box body 10 for feeding. The height position of the lower conveyor belt is lower than the height position of the limiting plate 21, which is used to convey nuts away from the box body 10 for discharging. A lifting door is slidably connected to one side of the box body 10 close to the double-layer conveyor belt in the vertical direction, which is used to prevent the paint mist from moving outside the box body 10 during the painting process. A fourth telescopic rod is also fixedly connected to the box body 10, and the output end of the fourth telescopic rod is fixedly connected to the lifting door, which is used to drive the lifting door to move in the vertical direction. The lateral nozzle 11 and the vertical nozzle 12 are both prior art. The paint mist sprayed by the lateral nozzle 11 and the vertical nozzle 12 has a conical dispersion range. The lateral nozzle 11 is fixedly connected to the inner side wall of the lateral nozzle 11, which is used to spray the outer surface of the nut from the lateral direction. The vertical nozzle 12 is slidably connected to the inner wall of the box body 10 in the vertical direction, which is used to spray the inner ring thread of the nut from the vertical direction. Among them, the sliding connection method of the vertical nozzle 12 in the vertical direction is a mature prior art, and the vertical movement of the vertical nozzle 12 is realized through a telescopic rod, which will not be elaborated here.

[0021] When the present invention is in use, when painting is required, the nut is placed on the limiting plate 21. After the clamping plate 23 slides along the limiting plate 21, the nut is clamped and limited. After the lifting plate 31 moves upward along the box body 10, it drives the limiting shaft 32 to move upward from the lower side of the nut. The limiting shaft 32 rotates along the lifting plate 31, so that while the limiting shaft 32 moves upward, it also rotates, that is, the limiting shaft 32 spirally ascends, so that the limiting shaft 32 drives the external thread 33 to be in threaded engagement with the internal thread of the nut. At this time, relative rotation and relative displacement in the vertical direction occur between the limiting shaft 32 and the nut. After the clamping plate 23 slides along the limiting plate 21, the clamping and limiting of the nut are released. Due to the self-locking property of the internal thread of the nut and the external thread 33, after the limiting shaft 32 continues to spiral upward, it drives the nut to spiral upward together. After the lateral nozzle 11 works, paint mist is ejected from the lateral direction. During the process of the nut spiraling upward, while the nut moves upward relative to the paint mist, it also rotates relative to the paint mist, which is convenient for the paint mist to cover the upper and lower ends of the nut and different positions on the outer surface of the nut. Compared with the prior art, since relative displacement occurs between the nut and the lateral nozzle 11, the situation that the paint mist ejected from the lateral nozzle 11 is difficult to cover the two ends of the nut is reduced, thereby improving the convenience of painting. When painting the internal thread of the nut is required, the lifting plate 31 no longer moves upward. After the lifting plate 31 moves downward, it drives the nut to move downward through the limiting shaft 32. At the same time, the limiting shaft 32 also rotates reversely along the lifting plate 31, so that while the limiting shaft 32 drives the nut to move downward, the limiting shaft 32 also drives the nut to rotate, that is, the limiting shaft 32 and the nut spiral downward together. At this time, when the nut passes through the lateral nozzle 11, the paint mist ejected from the lateral nozzle 11 can still adhere to the outer surface of the nut, so that the lateral nozzle 11 can paint the outer surface of the nut during both the spiral upward and spiral downward processes of the nut. After the limiting shaft 32 and the nut spiral downward together, the bottom of the nut fits with the limiting plate 21. The nut is blocked by the limiting plate 21 and cannot continue to spiral downward. The clamping plate 23 slides along the limiting plate 21 to clamp the nut to limit the nut, so that the position between the nut and the limiting plate 21 remains relatively fixed. After the limiting shaft 32 continues to spiral downward, it drives the external thread 33 to spiral downward. While the external thread 33 moves downward along the internal thread of the nut, the external thread 33 also rotates along the internal thread of the nut, so that the external thread 33 is disengaged from the internal thread of the nut. The limiting shaft 32 and the external thread 33 move downward together and are disengaged from the nut. At this time, there is no longer the limiting shaft 32 and the external thread 33 inside the nut. After the vertical nozzle 12 works, it sprays paint on the internal thread of the nut from the vertical direction. Compared with the prior art, it is convenient to spray paint on the internal thread of the nut, thereby improving the convenience of painting.

[0022] During the process of spraying paint on the inner ring thread of the nut by the vertical nozzle 12, since the vertical nozzle 12 is slidably connected to the inner wall of the box body 10 through a telescopic rod, the height position of the vertical nozzle 12 is adjusted by adjusting the extension length of the output end of the telescopic rod, so as to adjust the distance between the vertical nozzle 12 and the nut, which is convenient for the vertical nozzle 12 to spray paint on the inner ring thread of the nut.

[0023] Embodiment 2 Refer to Figures 1 to 8 , which is the second embodiment of the present invention, and this Embodiment 2 is based on the previous embodiment.

[0024] As Figure 3 、 Figure 6 and Figure 7 shown, a first motor 41 is provided at the lower end of the limit shaft 32. The first motor 41 is fixedly connected to the lifting plate 31. The output end of the first motor 41 is fixedly connected with a sliding shaft 42. The sliding shaft 42 is slidably connected to the limit shaft 32 in the vertical direction. A spring 43 is connected between the sliding shaft 42 and the limit shaft 32.

[0025] It should be noted that the first motor 41 is a motor with a self-locking function and a forward and reverse rotation function. One end of the spring 43 is fixedly connected to the limit shaft 32, and the other end of the spring 43 is fixedly connected to the sliding shaft 42. The stretching and compression of the spring 43 do not exceed the elastic limit of the spring 43.

[0026] According to the above structure, after the first motor 41 works, the output end drives the sliding shaft 42 to rotate, the sliding shaft 42 drives the limiting shaft 32 to rotate, the limiting shaft 32 drives the external thread 33 to rotate. During the process that the external thread 33 spirally enters the inner side of the nut, since the upper end of the external thread 33 may not be aligned with the lower end of the inner thread of the nut, in this case, it is difficult for the external thread 33 to be screwed into the inner thread of the nut. It is necessary to rotate the external thread 33 so that the upper end of the external thread 33 is aligned with the lower end of the inner thread of the nut before the external thread 33 can be screwed into the inner thread of the nut. However, in the present invention, the external thread 33 spirally ascends, that is, during the rotation of the external thread 33, the external thread 33 also moves upward, resulting in the situation that the external thread 33 jacks up the nut. To solve this situation, the sliding shaft 42 and the limiting shaft 32 are slidably connected in the vertical direction. When the upper end of the external thread 33 is not aligned with the lower end of the inner thread of the nut, while the sliding shaft 42 drives the limiting shaft 32 to rotate, the limiting shaft 32 moves downward relative to the sliding shaft 42. At this time, the spring 43 is compressed and its length decreases, avoiding the situation that the limiting shaft 32 drives the external thread 33 to jack up the nut. During the rotation of the limiting shaft 32, the upper end of the external thread 33 is aligned with the lower end of the inner thread of the nut, so that the external thread 33 can be screwed into the inner thread of the nut. After releasing the clamping and limiting of the nut by the clamping plate 23, the limiting shaft 32 drives the nut to thread upward through the external thread 33. At this time, the spring 43 recovers its length under the elastic action and drives the limiting shaft 32 and the sliding shaft 42 to reset, thus facilitating the screwing of the external thread 33 into the inner thread of the nut.

[0027] As Figure 2 shown, a lead screw 44 is provided on one side of the lifting plate 31. The lead screw 44 is rotatably connected to the box body 10. One end of the lead screw 44 is provided with a second motor 45. The output end of the second motor 45 is fixedly connected to the lead screw 44. The second motor 45 is fixedly connected to the box body 10. A slider 46 is drivingly connected to the lead screw 44. The slider 46 is slidably connected to the box body 10 in the vertical direction. The lifting plate 31 is fixedly connected to the slider 46.

[0028] It should be noted that the lead screw 44 and the slider 46 are prior arts, and the motion transmission is realized by the cyclic rolling of the balls in the spiral raceway, which will not be elaborated here. The second motor 45 is a motor with a self-locking function and a forward and reverse rotation function. A guide post is slidably connected to the inside of the slider 46 in the vertical direction. The guide post is fixedly connected to the box body 10 and is used to prevent relative rotation between the slider 46 and the lead screw 44 during the up and down sliding of the slider 46 along the box body 10.

[0029] According to the above structure, after the second motor 45 works, the output end drives the lead screw 44 to rotate, the lead screw 44 drives the slider 46 to move up and down along the box body 10, the slider 46 drives the lifting plate 31 to move up and down, and the lifting plate 31 drives the limiting shaft 32 to move up and down, thus facilitating the up and down movement of the limiting shaft 32 in the vertical direction.

[0030] As Figure 6 and Figure 7 shown, a chute 47 is provided at the lower end of the limit shaft 32, a slide bar 48 is fixedly connected to the upper end of the slide shaft 42, the slide bar 48 is in sliding fit with the chute 47 in the vertical direction, a retaining ring 49 is provided at the lower end of the chute 47, and the retaining ring 49 is fixedly connected to the lower end of the limit shaft 32.

[0031] It should be noted that the retaining ring 49 and the lower end of the limit shaft 32 are fixedly connected by screws.

[0032] According to the above structure, the chute 47 and the slide bar 48 cooperate with each other, making the relative sliding process between the limit shaft 32 and the slide shaft 42 more stable. The retaining ring 49 hinders the slide bar 48 from continuing to slide downward along the lower end of the chute 47, avoiding the situation where the slide bar 48 is disengaged from the chute 47.

[0033] As Figure 4 and Figure 5 shown, the limit plate 21 includes a connecting plate 51 rotatably mounted on the box body 10. Baffle plates 52 are slidably mounted on both sides of the connecting plate 51, and the clamping plate 23 is slidably mounted together with the baffle plates 52.

[0034] It should be noted that in the initial state, the distance between the two baffle plates 52 is greater than the outer diameter of the external thread 33, and the distance between the two baffle plates 52 is less than the across flats of the nut. The across flats refer to the distance between two parallel sides of the nut. Since the nut and the external thread 33 are adapted to each other, when painting nuts of different specifications and sizes, the limit shaft 32 with different specifications and sizes of external threads 33 is replaced so that the external thread 33 on the limit shaft 32 is adapted to the internal thread of the nut. This will not be elaborated here.

[0035] According to the above structure, since the external thread 33 needs to pass through the space between the two baffle plates 52, the distance between the two baffle plates 52 needs to be greater than the outer diameter of the external thread 33. Since the two baffle plates 52 need to prevent the nut from moving downward continuously, the distance between the two baffle plates 52 is less than the across flats of the nut. Thus, by sliding the baffle plates 52 along the connecting plate 51, the distance between the two baffle plates 52 in the initial state can be adjusted to facilitate the adaptation to nuts and external threads 33 of different specifications and sizes.

[0036] As Figure 4 and Figure 5As shown in the figure, a third motor 53 is fixedly connected to the box body 10. The output end of the third motor 53 is fixedly connected to the connecting plate 51. The baffle 52 is slidably connected to the connecting plate 51. First telescopic rods 54 are fixedly connected to both sides of the connecting plate 51. The output ends of the first telescopic rods 54 are fixedly connected to the baffle 52. The clamping plate 23 is slidably connected to the baffle 52. A second telescopic rod 55 is fixedly connected to the baffle 52. The output end of the second telescopic rod 55 is fixedly connected to the clamping plate 23.

[0037] It should be noted that the third motor 53 is a motor with a self-locking function and a forward and reverse function. The first telescopic rod 54 and the second telescopic rod 55 are preferably electric telescopic rods in the present invention.

[0038] According to the above structure, after the third motor 53 works, the output end drives the connecting plate 51 to rotate, and the connecting plate 51 drives the baffle 52 to rotate. When feeding is required, the end of the baffle 52 rotates upward and approaches the upper conveyor belt of the double-layer conveyor belt, facilitating the nuts to fall from the upper conveyor belt onto the inclined baffle 52. When discharging is required, the end of the baffle 52 rotates downward and approaches the lower conveyor belt of the double-layer conveyor belt, facilitating the nuts to fall along the inclined baffle 52 onto the lower conveyor belt, thus facilitating automatic feeding and discharging. Moreover, after the first telescopic rod 54 works, the output end drives the baffle 52 to slide along the connecting plate 51 to adjust the distance between the two baffles 52. After the second telescopic rod 55 works, the output end drives the clamping plate 23 to slide along the baffle 52 to adjust the distance between the two clamping plates 23, thereby facilitating the two clamping plates 23 to clamp and limit the nuts or release the clamping and limiting of the nuts by the two clamping plates 23.

[0039] As Figure 4 and Figure 5 shown, first guide rods 56 are fixedly connected to both sides of the connecting plate 51. First sliding holes 57 are formed in the baffle 52. The first sliding holes 57 are in sliding fit with the first guide rods 56. Second guide rods 58 are fixedly connected to the baffle 52. Second sliding holes 59 are formed in the clamping plate 23. The second guide rods 58 are in sliding fit with the second sliding holes 59.

[0040] According to the above structure, the cooperation between the first guide rod 56 and the first sliding hole 57 makes the process of the baffle 52 sliding along the connecting plate 51 more stable. The cooperation between the second sliding hole 59 and the second guide rod 58 makes the process of the clamping plate 23 sliding along the baffle 52 more stable.

[0041] As Figure 4 and Figure 5 shown, the clamping assembly 22 further includes a third telescopic rod 61 fixedly connected to the clamping plate 23. The output end of the third telescopic rod 61 is fixedly connected to a push plate 62. A stop block 63 is provided at one end of the clamping plate 23 away from the push plate 62. The stop block 63 is fixedly connected to the limiting plate 21.

[0042] It should be noted that the third telescopic rod 61 is preferably an electric telescopic rod in the present invention.

[0043] According to the above structure, when the clamping plate 23 clamps the nut, the nut is only limited in the horizontal direction. After the third telescopic rod 61 works, the output end drives the push plate 62 to move longitudinally. The push plate 62 pushes the nut close to the stopper 63, so that both the push plate 62 and the stopper 63 are in contact with the nut. The push plate 62 and the stopper 63 limit the nut in the longitudinal direction, which is convenient for aligning the axis of the nut with the axis of the limiting shaft 32, so as to facilitate the limiting shaft 32 to drive the external thread 33 to screw into the internal thread of the nut.

[0044] As Figure 2 , Figure 3 and Figure 6 shown, a cleaning roller 71 is arranged on the outer side of the limiting shaft 32. The cleaning roller 71 is in rolling cooperation with the limiting shaft 32, and the cleaning roller 71 is installed on the box body 10.

[0045] It should be noted that the stopper 63 is fixedly connected to the connecting plate 51. The outer side of the cleaning roller 71 is made of cleaning cotton and is used to clean the residual paint liquid and impurities on the limiting shaft 32, which will not be elaborated here.

[0046] According to the above structure, during the process of the limiting shaft 32 spirally rising or spirally descending, the cleaning roller 71 rolls along the outer surface of the limiting shaft 32. Since the limiting shaft 32 rotates while moving up and down relative to the cleaning roller 71, the cleaning roller 71 cleans the surface of the limiting shaft 32, reducing the residue of paint liquid and impurities on the limiting shaft 32. Compared with the prior art, the cleaning process of the cleaning roller 71 can complete the cleaning of the limiting shaft 32 during the operation of the device, reducing the situation that manual wiping of the limiting shaft 32 with cleaning cotton is required after shutdown, and improving the convenience.

[0047] As Figure 6 and Figure 8 shown, an installation frame 72 is fixedly connected to the box body 10. A connecting frame 73 is slidably connected to the installation frame 72. The cleaning roller 71 is rotatably connected to the connecting frame 73. A first limiting hole 74 is opened on the installation frame 72, and a plurality of second limiting holes 75 are opened on the connecting frame 73. A limiting pin 76 is slidably connected inside the first limiting hole 74 and the second limiting holes 75.

[0048] It should be noted that a through hole is opened on the installation frame 72. One end of the connecting frame 73 away from the cleaning roller 71 is slidably matched with the through hole. The plurality of second limiting holes 75 are distributed along the sliding direction of the connecting frame 73.

[0049] According to the above structure, when it is necessary to adjust the distance between the axis of the cleaning roller 71 and the limiting shaft 32, the limiting pin 76 is pulled out from the first limiting hole 74 and the second limiting hole 75, and the connecting frame 73 is slid along the mounting frame 72 so that the first limiting hole 74 is aligned with the second limiting hole 75 at a suitable position. Then the limiting pin 76 is inserted into the inside of the first limiting hole 74 and the second limiting hole 75 to limit the mounting frame 72 and the connecting frame 73, thereby adjusting the distance between the axis of the cleaning roller 71 and the limiting shaft 32, facilitating the adaptation to the limiting shaft 32 with different diameters, improving the adaptability, and since the mounting frame 72 and the connecting frame 73 are detachable, it is convenient for the disassembly and installation of the connecting frame 73, and thus convenient for the disassembly, installation and replacement of the cleaning roller 71.

[0050] The working principle of the present invention is as follows: After the lifting plate 31 moves upward along the box body 10, it drives the limiting shaft 32 to approach the nut on the limiting plate 21 from below. Since the limiting shaft 32 also rotates along the lifting plate 31, the limiting shaft 32 spirally ascends and drives the external thread 33 to screw into the inner thread of the nut. The limiting shaft 32 drives the nut to spiral up and then spiral down through the external thread 33. During this process, after the lateral nozzle 11 works, it sprays paint mist towards the nut from the lateral direction. Compared with the prior art, since there is a relative displacement between the nut and the lateral nozzle 11, the situation that the paint mist sprayed by the lateral nozzle 11 is difficult to cover both ends of the nut is reduced. And when the limiting shaft 32 drives the nut to spiral down through the external thread 33, the nut contacts the limiting plate 21 and is blocked by the limiting plate 21 and cannot continue to move downward, so that the nut is separated from the limiting shaft 32. Compared with the prior art, since the vertical nozzle 12 is no longer blocked by the limiting shaft 32 and the external thread 33 when spraying paint on the inner side of the nut, it is convenient for the vertical nozzle 12 to spray paint on the inner thread of the nut, so as to improve the convenience of spraying paint.

[0051] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices and operation methods not specifically described and explained in the present invention, unless otherwise specifically stated and limited, are implemented according to the conventional means in the art.

Claims

1. A precision machining metal nut surface painting device, characterized in that, Including: A box body (10), inside which a lateral nozzle (11) and a vertical nozzle (12) are installed; A limiting mechanism (20), which is arranged on the box body (10). The limiting mechanism (20) includes a limiting plate (21) installed on the box body (10), and a clamping assembly (22) is arranged on the limiting plate (21). The clamping assembly (22) includes two clamping plates (23) respectively slidably installed on both sides of the limiting plate (21); A lifting mechanism (30), which is arranged on the box body (10). The lifting mechanism (30) includes a lifting plate (31) slidably installed on the box body (10) in the vertical direction. A limiting shaft (32) is rotatably installed on the lifting plate (31). The limiting shaft (32) is located inside the limiting plate (21), below the vertical nozzle (12), and an external thread (33) is provided at the upper end of the limiting shaft (32); Wherein, after the clamping plates (23) slide along the limiting plate (21) to adjust the distance between the clamping plates (23), when the lifting plate (31) slides along the box body (10) and the limiting shaft (32) rotates along the lifting plate (31), the external thread (33) spirally ascends or descends.

2. The precision machining metal nut surface painting device according to claim 1, characterized in that: A first motor (41) is arranged at the lower end of the limiting shaft (32). The first motor (41) is fixedly connected to the lifting plate (31). The output end of the first motor (41) is fixedly connected with a sliding shaft (42). The sliding shaft (42) is slidably connected with the limiting shaft (32) in the vertical direction, and a spring (43) is connected between the sliding shaft (42) and the limiting shaft (32).

3. The precision machining metal nut surface painting device according to claim 1, characterized in that: A lead screw (44) is arranged on one side of the lifting plate (31). The lead screw (44) is rotatably connected to the box body (10). One end of the lead screw (44) is provided with a second motor (45). The output end of the second motor (45) is fixedly connected with the lead screw (44). The second motor (45) is fixedly connected to the box body (10). A slider (46) is drivingly connected to the lead screw (44). The slider (46) is slidably connected with the box body (10) in the vertical direction, and the lifting plate (31) is fixedly connected with the slider (46).

4. The precision machining metal nut surface painting device according to claim 2, characterized in that: A chute (47) is provided at the lower end of the limiting shaft (32). The upper end of the sliding shaft (42) is fixedly connected with a sliding bar (48). The sliding bar (48) is slidably matched with the chute (47) in the vertical direction. A retaining ring (49) is arranged at the lower end of the chute (47), and the retaining ring (49) is fixedly connected to the lower end of the limiting shaft (32).

5. The precision machining metal nut surface painting device according to claim 1, characterized in that: The limiting plate (21) includes a connecting plate (51) rotatably installed on the box body (10). Baffle plates (52) are slidably installed on both sides of the connecting plate (51), and the clamping plates (23) are slidably installed together with the baffle plates (52).

6. The precision machining metal nut surface painting device according to claim 5, characterized in that: A third motor (53) is fixedly connected to the box body (10). The output end of the third motor (53) is fixedly connected to a connecting plate (51). The baffle (52) is slidably connected to the connecting plate (51). Both sides of the connecting plate (51) are fixedly connected with first telescopic rods (54). The output end of the first telescopic rod (54) is fixedly connected to the baffle (52). The clamping plate (23) is slidably connected to the baffle (52). A second telescopic rod (55) is fixedly connected to the baffle (52). The output end of the second telescopic rod (55) is fixedly connected to the clamping plate (23).

7. The precision machining metal nut surface painting device according to claim 6, characterized in that: Both sides of the connecting plate (51) are fixedly connected with first guide rods (56). First sliding holes (57) are formed in the baffle (52). The first sliding holes (57) are in sliding fit with the first guide rods (56). A second guide rod (58) is fixedly connected to the baffle (52). Second sliding holes (59) are formed in the clamping plate (23). The second guide rod (58) is in sliding fit with the second sliding holes (59).

8. The precision machining metal nut surface painting device according to claim 1, characterized in that: The clamping assembly (22) further includes a third telescopic rod (61) fixedly connected to the clamping plate (23). The output end of the third telescopic rod (61) is fixedly connected with a push plate (62). A stop block (63) is arranged at one end of the clamping plate (23) away from the push plate (62). The stop block (63) is fixedly connected to the limiting plate (21).

9. The precision machining metal nut surface painting device according to claim 1, characterized in that: A cleaning roller (71) is arranged on the outer side of the limiting shaft (32). The cleaning roller (71) is in rolling fit with the limiting shaft (32). The cleaning roller (71) is installed on the box body (10).

10. The precision machining metal nut surface painting device according to claim 9, characterized in that: An installation frame (72) is fixedly connected to the box body (10). A connecting frame (73) is slidably connected to the installation frame (72). The cleaning roller (71) is rotatably connected to the connecting frame (73). A first limiting hole (74) is formed in the installation frame (72). A plurality of second limiting holes (75) are formed in the connecting frame (73). A limiting pin (76) is slidably connected inside the first limiting hole (74) and the second limiting holes (75).

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