A rotor painting apparatus and a painting method for a motor rotor

Abstract

The application discloses a kind of rotor paint dripping equipment and for motor rotor paint dripping method, it is related to paint dripping equipment field, including paint dripping shell, rotary assembly is arranged in paint dripping shell, the end of paint dripping shell is provided with material port, one end of rotary assembly is arranged in paint dripping shell, the other end of rotary assembly extends to paint dripping shell outside by material port, rotary assembly is provided with several placing assemblies, several placing assemblies include rotary rod and the placing unit of rotary rod two ends are provided. Realize the continuous circulation of motor rotor in paint dripping area and external material exchange area, uniform speed paint dripping and motor rotor rotation synergy, so that paint can be evenly dropped in each position of motor rotor, and evenly cover the outer surface and gap of motor rotor under capillary action, avoid paint accumulation or local leakage, improve paint uniformity and consistency, by magnetic attraction fixed motor rotor, can quickly place and take out motor rotor, improve efficiency.

Description

Technical Field

[0001] This invention relates to the field of paint dripping equipment, and particularly to a rotor paint dripping device and a paint dripping method for an electric motor rotor. Background Technology

[0002] Automobiles use a large number of electric motors, such as electric power steering motors, electric air conditioning compressor motors, and cooling fan motors. The varnishing of the motor rotor is a key insulation process in the manufacturing process, mainly targeting the core slots of wound rotors or some permanent magnet rotors.

[0003] Motor rotor varnishing equipment is a specialized device for insulating motor rotors. This equipment uses a varnishing process to insulate the motor rotor, effectively improving the motor's performance and lifespan. The equipment first heats the motor rotor windings, and then, while the rotor is rotating, it drips insulating varnish onto the windings from the varnishing head. The insulating varnish penetrates into the windings through gravity and capillary action. Subsequently, it passes through a gel section and a curing section, where the varnish is heated and cured, thus forming a uniform and dense insulating layer.

[0004] Chinese patent application CN116260299A discloses a continuous paint-drip conveying device for a motor stator, comprising a frame; an annular conveyor chain mounted on the frame and adapted to drive relative to the frame; a self-rotating drive chain arranged parallel and spaced apart on one side of the annular conveyor chain and adapted to drive relative to the frame; an annular guide rail arranged parallel and spaced apart on the other side of the annular conveyor chain; and having at least two horizontal sections of different heights that smoothly transition to each other on the guide rail located in the paint-drip area; and a plurality of stator connecting assemblies, each of which is spaced apart and connected to the annular guide rail and the self-rotating drive chain respectively; the stator connecting assemblies are configured to slide along the annular guide rail and change their tilt angle under the drive of the annular conveyor chain, thereby ensuring both paint-drip effect and production efficiency;

[0005] Chinese patent application CN105763006A discloses a paint-dripping section structure for a motor rotor paint-dripping machine, including a paint-dripping section frame and a paint-dripping conveyor belt section. The paint-dripping conveyor belt section is equipped with several rotor clamps and several clamp motors. The paint-dripping section frame is equipped with a paint storage section and several dripping pipes connected to the paint storage section. Each dripping pipe is equipped with an electromagnetic on / off valve. A paint-receiving plate is located below the paint-dripping conveyor belt section, with a paint-receiving groove on its upper surface. A paint-dripping pipe is located on the paint-receiving plate, with one end connected to the paint-receiving groove and the other end connected to the inlet of a return paint pump. The outlet of the return paint pump is connected to the paint storage section via a return paint pipe. The paint-dripping pipe is equipped with a paint-drip on / off valve. This machine can drip paint onto the motor rotor and effectively recover fallen paint. The recovery process is fast and efficient, with good circulation, reducing waste. The paint-dripping efficiency is high, with few bubbles and good bonding effect of the insulating varnish. The uniformity of the dripped insulating varnish ensures the coating quality of the insulating varnish on the surface of the motor rotor.

[0006] The aforementioned patents and prior art also have the following defects:

[0007] Existing paint-drip equipment involves a cycle of moving the motor rotor in a circular motion and dripping paint onto it when it is suspended. During this process, the motor rotor cannot rotate to adjust its position, resulting in uneven paint distribution. Furthermore, the practice of adding a clamp motor to the fixture of each set of motor rotors requires a large number of independent motors, which not only increases costs but also increases the failure rate. In addition, the existing motor rotors require the clamp to be operated when picking them up or putting them down, making the operation cumbersome and inconvenient.

[0008] Therefore, this application provides a rotor spraying device and a spraying method for motor rotors to meet the requirements. Summary of the Invention

[0009] The purpose of this application is to provide a rotor spraying device and a spraying method for a motor rotor, which realizes continuous circulation of the motor rotor in the spraying area and the external material exchange area. The uniform spraying and the rotation of the motor rotor work together to ensure that the paint can be evenly sprayed onto all positions of the motor rotor and evenly cover the outer surface and gaps of the motor rotor under capillary action, avoiding paint accumulation or local missed coating, improving the uniformity and consistency of the paint. The motor rotor can be quickly placed and removed by magnetic attraction, improving efficiency.

[0010] To achieve the above objectives, this application provides the following technical solution: a rotor-type paint dripping device, comprising a paint dripping housing, a rotary assembly disposed within the paint dripping housing, a material inlet at one end of the paint dripping housing, one end of the rotary assembly disposed within the paint dripping housing, and the other end of the rotary assembly extending outside the paint dripping housing through the material inlet, the rotary assembly being provided with a plurality of placement components, each of the placement components comprising a rotary rod and placement units disposed at both ends of the rotary rod, each placement unit comprising a rotary cylinder and an adsorption magnetic block, one end of the rotary cylinder being open, and the adsorption magnetic block being fixedly installed inside the rotary cylinder;

[0011] The paint dripping housing is provided with a paint dripping tube, which is located above the rotary assembly. The paint dripping tube can drip paint at a uniform speed. The paint dripping housing is also provided with a self-rotating assembly, which can drive the placement unit located inside the paint dripping housing to rotate.

[0012] Preferably, the rotary assembly includes two rotary chains, a rotary motor, a rotary shaft, two rotary auxiliary gears, and two rotary gears. The rotary shaft is fixedly installed at the output end of the rotary motor, the two rotary gears are fixedly installed on the rotary shaft, one end of each of the two rotary chains meshes with a corresponding rotary gear, and the other end of each of the two rotary chains meshes with a corresponding rotary auxiliary gear. The rotary auxiliary gears are disposed outside the paint dripping housing, and a plurality of rotary rods are equidistantly fixedly installed on the two rotary chains.

[0013] Preferably, the rotation assembly includes a rotation chain, two drive gears, a rotation shaft, two drive auxiliary gears, and a rotation motor. The rotation shaft is fixedly installed at the output end of the rotation motor, and the two drive gears are fixedly installed on the rotation shaft. The rotation chain meshes with the drive gears and drive auxiliary gears. The placement assembly also includes a rotation gear, which is fixedly installed on the rotary rod. The rotation gear meshes with the rotation chain, located on the outer side of the rotation chain and meshing with the middle of the rotation chain. The two drive gears are located on the inner side of the rotation chain and meshing with the outer side of the rotation chain.

[0014] Preferably, the placement unit further includes a limiting sleeve and a locking screw. The limiting sleeve is inserted into the rotary drum, and a locking screw hole is provided on the limiting sleeve. A connecting hole is provided on the rotary drum, and the locking screw passes through the connecting hole and is threaded into the locking screw hole. A rotating block is fixedly installed on the locking screw.

[0015] Preferably, an electric heater is installed on the inner top of the paint dripping shell, and an exhaust pipe is fixedly connected to the top of the paint dripping shell, with an exhaust pump installed inside the exhaust pipe.

[0016] Preferably, a support side plate is fixedly installed inside the paint dripping shell, and both the rotary shaft and the self-rotation shaft are rotatably connected to the support side plate. A drive auxiliary gear is rotatably connected to the rotary shaft, and an auxiliary shaft is fixedly installed on the rotary auxiliary gear. The auxiliary shaft is rotatably connected to the support side plate, and both the self-rotation motor and the rotary motor are fixedly installed on the support side plate.

[0017] Preferably, the placement unit further includes a fixed cylinder and a connecting pipe, the connecting pipe being fixedly installed on the rotating rod, the fixed cylinder being fixedly installed on the connecting pipe, the rotating cylinder being fixedly installed on the fixed cylinder, the connecting plate being fixedly installed inside the rotating cylinder, and the adsorption magnetic block being fixedly installed on the connecting plate.

[0018] Preferably, the paint dripping housing is equipped with a fixing rod, a paint tank, a peristaltic pump, and a paint supply pipe. The paint dripping pipe is fixedly installed on the fixing rod, the paint supply pipe is fixed and connected to the paint dripping pipe, the input end of the peristaltic pump is connected to the paint tank, and the output end of the peristaltic pump is fixed and connected to the paint supply pipe.

[0019] Preferably, the placement assembly further includes a clamping unit, which includes two clamping blocks, two compression springs, and a push sleeve. The two clamping blocks are located inside the rotary drum, and the two compression springs can push the two clamping blocks to move closer to each other. A push strip is fixedly installed at one end of the support side plate near the opening of the paint dripping housing. The end of the push strip is inclined. When the placement assembly moves to the position of the push strip, the push strip can push the corresponding push sleeve to move, so that the push sleeve drives the two clamping blocks to move away from each other.

[0020] A method for applying paint to an electric motor rotor, using the aforementioned rotor paint application equipment, includes the following steps:

[0021] The rotating component drives all the placement components to move along the circular path;

[0022] When the placement unit moves with the rotating assembly to directly below the paint dripping tube, the paint dripping tube drips paint onto the surface of the motor rotor at a constant flow rate.

[0023] The rotating component drives the rotating drum of the placement unit to rotate around its own axis, which in turn drives the motor rotor to rotate at a constant speed to complete the uniform coating of the paint liquid.

[0024] After the paint is dispensed inside the paint-dispensing housing, it is removed from the housing through the nozzle.

[0025] Remove the motor rotor, after the paint has been applied, from the rotary drum. Insert the new motor rotor into the open end of the rotary drum and use magnetic blocks to hold it in place.

[0026] In summary, the technical effects and advantages of this invention are as follows:

[0027] 1. In this invention, the self-rotating component drives all the rotating drums to rotate around their own axis, so that the motor rotor can rotate when the paint is suspended and dripping, making the paint coating more even. It does not require a motor to drive the rotation on each rotating drum, which reduces costs and increases stability. In addition, the self-rotating component only drives the motor rotor inside the paint dripping shell to rotate, which makes it easy to pick up and put down the motor rotor located outside the paint dripping shell. Combined with magnetic fixation, it is more convenient to use.

[0028] 2. In this invention, the motor rotor achieves continuous circulation between the paint dripping area and the external material exchange area. The uniform paint dripping and the rotation of the motor rotor work together to ensure that the paint can be evenly dripped onto various positions of the motor rotor and evenly covered the outer surface and gaps of the motor rotor under capillary action, avoiding paint accumulation or local missed coating, improving the uniformity and consistency of the paint. The motor rotor is fixed by magnetic attraction, which can quickly place and remove the motor rotor, improving efficiency.

[0029] 3. In this invention, a self-rotating motor drives a self-rotating shaft to rotate, which in turn drives two drive gears to rotate. The drive gears mesh with a self-rotating chain to make it circulate. When the rotary rod moves into the paint-spraying housing, the self-rotating gear on it meshes with the middle of the self-rotating chain. The self-rotating chain drives the self-rotating gear to rotate, and the self-rotating gear drives the rotary rod to rotate around its own axis. The rotary rod drives the rotary drum and the motor rotor to rotate synchronously. A single self-rotating chain drives multiple self-rotating gears simultaneously, simplifying the transmission structure. The inner and outer meshing and staggered arrangement prevents the self-rotating gears from colliding and interfering with the drive gears, improving stability and achieving full-coverage self-rotation drive within the paint-spraying area. Furthermore, the chain drive prevents the rotary rod from slipping.

[0030] 4. In this invention, by unscrewing the locking screw, the limiting sleeve can be detached from the rotary drum, thereby replacing it with a limiting sleeve of suitable inner diameter. This ensures that the diameter of the limiting sleeve matches that of the motor rotor rod, preventing the motor rotor from wobbling when inserted into the rotary drum. Combined with magnetic attraction, this improves stability. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0033] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the paint dripping shell, the exhaust pipe, and the supporting side plate in this invention;

[0035] Figure 4 This is a schematic diagram of the structure for placing components and supporting side plates in this invention;

[0036] Figure 5 For the present invention Figure 4 Enlarged view of section A;

[0037] Figure 6 This is a schematic diagram of the structure of the rotary chain, rotary gear and self-rotating component in this invention;

[0038] Figure 7 This is a schematic diagram of the structure of the self-rotating gear and clamping unit in this invention;

[0039] Figure 8 This is a schematic diagram of the structure of the self-transmitting gear, the rotating rod, and the rotating cylinder in this invention;

[0040] Figure 9 This is a schematic diagram of the structure of the rotary rod, connecting pipe and push rod in this invention;

[0041] Figure 10 For the present invention Figure 9 Enlarged view of section B.

[0042] In the diagram: 1. Paint dripping shell; 2. Rotary assembly; 21. Rotary chain; 22. Rotary motor; 23. Rotary gear; 3. Placement assembly; 31. Rotary rod; 32. Placement unit; 321. Rotary cylinder; 322. Adsorption magnet; 323. Limiting sleeve; 324. Locking screw; 325. Fixing cylinder; 326. Connecting pipe; 33. Rotating gear; 34. Clamping unit; 341. Clamping block; 342. Compression spring; 343. Pushing sleeve; 344. Sliding block; 345. Sliding rod; 346. Hinge rod; 347. Pushing rod; 348. Pushing block; 4. Paint dripping tube; 5. Rotary assembly; 51. Rotating chain; 52. Drive gear; 53. Rotating motor; 6. Exhaust pipe; 7. Paint supply pipe; 8. Supporting side plate; 9. Push bar. Detailed Implementation

[0043] 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.

[0044] Example 1: Reference Figures 1-10 The illustrated rotor-type paint-dispensing device includes a paint-dispensing housing 1, a rotary assembly 2 disposed inside the paint-dispensing housing 1, a material inlet at one end of the paint-dispensing housing 1, one end of the rotary assembly 2 disposed inside the paint-dispensing housing 1, and the other end of the rotary assembly 2 extending outside the paint-dispensing housing 1 through the material inlet. A plurality of placement assemblies 3 are disposed on the rotary assembly 2, each placement assembly 3 including a rotary rod 31 and placement units 32 disposed at both ends of the rotary rod 31. Each placement unit 32 includes a rotary cylinder 321 and an adsorption magnetic block 322. One end of the rotary cylinder 321 is open, and the adsorption magnetic block 322 is fixedly installed inside the rotary cylinder 321.

[0045] The paint dripping housing 1 is provided with a paint dripping tube 4, which is located above the rotary component 2. The paint dripping tube 4 can drip paint at a uniform speed. The paint dripping housing 1 is also provided with a self-rotating component 5, which can drive the placement unit 32 located inside the paint dripping housing 1 to rotate.

[0046] The rotating component 2 drives all the placement components 3 to move along the circular path. When the placement unit 32 moves with the rotating component 2 to directly below the paint dripping tube 4, the paint dripping tube 4 drips paint onto the surface of the motor rotor at a constant flow rate. At the same time, the self-rotating component 5 drives the rotating cylinder 321 of the placement unit 32 to rotate around its own axis, causing the motor rotor to rotate at a uniform speed to complete the uniform coating of the paint. After the paint dripping is completed in the paint dripping housing 1, it is moved out of the housing through the material port. When the motor rotor is inserted into the opening end of the rotating cylinder 321, the adsorption magnetic block 322 adsorbs and fixes it to ensure that the motor rotor does not fall off during movement.

[0047] The self-rotating component 5 drives all the rotating drums 321 to rotate around their own axis, so that the motor rotor can rotate when the paint is suspended and dripping, making the paint coating more even. It does not require a motor to drive the rotation on each rotating drum 321, which reduces costs and increases stability. In addition, the self-rotating component 5 only drives the motor rotor inside the paint dripping housing 1 to rotate, which makes it easy to pick up and put down the motor rotor located outside the paint dripping housing 1. With magnetic fixation, it is more convenient to use.

[0048] It enables continuous circulation of the motor rotor between the paint dripping area and the external material exchange area. The uniform paint dripping and the motor rotor's rotation work together to ensure that the paint is evenly dripped onto all positions of the motor rotor and evenly covers the outer surface and gaps of the motor rotor under capillary action, avoiding paint accumulation or local missed coating, and improving the uniformity and consistency of the paint. The motor rotor is fixed by magnetic attraction, which can quickly place and remove the motor rotor, improving efficiency.

[0049] The rotary assembly 2 includes two rotary chains 21, a rotary motor 22, a rotary shaft, two rotary auxiliary gears, and two rotary gears 23. The rotary shaft is fixedly installed at the output end of the rotary motor 22, and the two rotary gears 23 are fixedly installed on the rotary shaft. One end of each of the two rotary chains 21 meshes with the corresponding rotary gear 23, and the other end of each of the two rotary chains 21 meshes with the corresponding rotary auxiliary gear. The rotary auxiliary gear is disposed outside the paint dripping housing 1, and a plurality of rotary rods 31 are equidistantly fixedly installed on the two rotary chains 21.

[0050] After the rotary motor 22 starts, its output torque drives the rotary shaft to rotate. The rotary shaft drives two rotary gears 23 to rotate synchronously. The rotary gears 23 mesh and drive the rotary chain 21 to move. The rotary chain 21 drives the rotary auxiliary gear at the other end to rotate. Multiple rotary rods 31, which are equidistantly fixed on the two rotary chains 21, move with the rotary chains 21. The chain structure of the double rotary chain 21 ensures the translational stability of the rotary rods 31 and avoids tilting. The equidistant installation ensures that the interval between the motor rotors is consistent and the paint dripping time is precisely controlled.

[0051] The rotation assembly 5 includes a rotation chain 51, two drive gears 52, a rotation shaft, two drive auxiliary gears, and a rotation motor 53. The rotation shaft is fixedly installed at the output end of the rotation motor 53, and the two drive gears 52 are fixedly installed on the rotation shaft. The rotation chain 51 meshes with the drive gears 52 and the drive auxiliary gears. The placement assembly 3 also includes a rotation gear 33, which is fixedly installed on the rotary rod 31. The rotation gear 33 meshes with the rotation chain 51. The rotation gear 33 is located on the outside of the rotation chain 51 and meshes with the middle of the rotation chain 51. The two drive gears 52 are located on the inside of the rotation chain 51 and mesh with the outside of the rotation chain 51.

[0052] The self-rotating motor 53 drives the self-rotating shaft to rotate, which in turn drives two drive gears 52 to rotate. The drive gears 52 mesh with the self-rotating chain 51 to make it circulate. When the rotary rod 31 moves into the paint dripping housing 1, the self-rotating gear 33 on it meshes with the middle of the self-rotating chain 51. The self-rotating chain 51 drives the self-rotating gear 33 to rotate, and the self-rotating gear 33 drives the rotary rod 31 to rotate around its own axis. The rotary rod 31 drives the rotary drum 321 and the motor rotor to rotate synchronously. A single self-rotating chain 51 drives multiple self-rotating gears 33 at the same time, simplifying the transmission structure. The inner and outer meshing and staggered arrangement prevents the self-rotating gears 33 from colliding and interfering with the drive gears 52, improving stability and achieving full coverage self-rotation drive in the paint dripping area. Moreover, the chain drive prevents the rotary rod 31 from slipping.

[0053] The paint dripping area is the internal region of the paint dripping shell 1.

[0054] The self-rotating chain 51 includes several pins and four sets of chain plates. All four sets of chain plates are rotatably connected to the pins, and the chain plates in the same set are connected in an alternating hinge manner. The self-rotating gear 33 is located between the two sets of chain plates in the middle, and the driving gear 52 is located between the two sets of chain plates on the outermost side.

[0055] When the self-rotating chain 51 is running, the four sets of chain plates form a continuous meshing surface through alternating hinges. The outer surfaces of the two middle sets of chain plates mesh with the tooth grooves of the self-rotating gear 33 to transmit torque; the inner surfaces of the two outermost sets of chain plates mesh with the tooth grooves of the drive gear 52 to receive power, and the pins ensure the stability of the relative positions between the chain plate sets.

[0056] Example 2, refer to Figures 1-10 As shown, unlike the above embodiment, the placement unit 32 further includes a limiting sleeve 323 and a locking screw 324. The limiting sleeve 323 is inserted into the rotary drum 321. The limiting sleeve 323 has a locking screw hole. The rotary drum 321 has a connecting hole. The locking screw 324 passes through the connecting hole and is threaded into the locking screw hole. A rotating block is fixedly installed on the locking screw 324.

[0057] By unscrewing the locking screw 324, the limiting sleeve 323 can be disengaged from the rotary drum 321, thereby replacing the limiting sleeve 323 with one of suitable inner diameter. This ensures that the limiting sleeve 323 matches the diameter of the motor rotor rod, preventing the motor rotor from wobbling when inserted into the rotary drum 321. Combined with magnetic attraction, this improves stability.

[0058] Example 3, referring to Figures 1-10 As shown, unlike the above embodiment, an electric heater is installed on the inner top of the paint dripping shell 1, an exhaust pipe 6 is fixedly connected to the top of the paint dripping shell 1, an exhaust pump is installed in the exhaust pipe 6, a fixing rod, a paint tank, a peristaltic pump and a paint supply pipe 7 are installed on the paint dripping shell 1, the paint dripping pipe 4 is fixedly installed on the fixing rod, the paint supply pipe 7 is fixed and connected to the paint dripping pipe 4, the input end of the peristaltic pump is connected to the paint tank, and the output end of the peristaltic pump is fixed and connected to the paint supply pipe 7.

[0059] The electric heater preheats the motor rotor inside the paint dripping housing 1, improving the adhesion of the paint and solidifying the paint on the motor rotor after the paint dripping is completed. The peristaltic pump draws paint from the paint tank, delivers it to the paint dripping pipe 4 through the paint supply pipe 7, and drips it onto the motor rotor below. The exhaust pump extracts volatile gases through the exhaust pipe 6 to prevent large-scale leakage of harmful gases and protect environmental safety.

[0060] A support side plate 8 is fixedly installed inside the paint dripping housing 1. Both the rotary shaft and the self-rotation shaft are rotatably connected to the support side plate 8. The drive auxiliary gear is rotatably connected to the rotary shaft. An auxiliary shaft is fixedly installed on the rotary auxiliary gear and is rotatably connected to the support side plate 8. The self-rotation motor 53 and the rotary motor 22 are both fixedly installed on the support side plate 8.

[0061] Example 4, refer to Figures 1-10 As shown, unlike the above embodiment, the placement component 3 further includes a clamping unit 34. The clamping unit 34 includes two clamping blocks 341, two compression springs 342, and a pushing sleeve 343. The two clamping blocks 341 are located inside the rotary drum 321. The two compression springs 342 can push the two clamping blocks 341 to move closer to each other. A pushing strip 9 is fixedly installed at one end of the support side plate 8 near the opening of the paint dripping housing 1. The end of the pushing strip 9 is inclined. When the placement component 3 moves to the position of the pushing strip 9, the pushing strip 9 can push the corresponding pushing sleeve 343 to move, so that the pushing sleeve 343 drives the two clamping blocks 341 to move away from each other.

[0062] When the placement component 3 is removed from the material outlet, the push sleeve 343 contacts the inclined end face of the push bar 9. The inclined surface of the push bar 9 forces the push sleeve 343 to move axially. The push sleeve 343 overcomes the force of the clamping spring 342 and pulls the clamping block 341 to separate, thus picking up and discharging the motor rotor. As the motor rotor moves, the push sleeve 343 disengages from the push bar 9. The clamping spring 342 drives the two clamping blocks 341 to move closer to each other, clamping the motor rotor. The motor rotor moves into the paint dripping housing 1 to perform paint dripping operations. This allows for convenient picking up and discharging of the motor rotor. At the same time, after the motor rotor moves into the paint dripping housing 1, it is clamped to prevent the motor rotor from falling and improves the stability of the motor rotor. It also enables the rotary drum 321 to stably drive the motor rotor to rotate, improving the uniformity of the paint liquid.

[0063] The clamping unit 34 further includes a connecting plate, two sliding blocks 344, a sliding rod 345, two hinge rods 346, a pushing rod 347, and several pushing blocks 348. The placement unit 32 further includes a fixed cylinder 325 and a connecting pipe 326. The connecting pipe 326 is fixedly installed on the rotating rod 31, the fixed cylinder 325 is fixedly installed on the connecting pipe 326, the rotating cylinder 321 is fixedly installed on the fixed cylinder 325, the connecting plate is fixedly installed inside the rotating cylinder 321, the adsorption magnet 322 is fixedly installed on the connecting plate, and the two sliding blocks 344 are respectively fixedly installed on the corresponding clamping blocks 341. The connecting plate has a sliding groove, and the sliding blocks 344 slide in the sliding groove. The sliding rod 345 is fixedly installed on the fixed cylinder 325. Within 5, the sliding block 344 is slidably fitted onto the sliding rod 345. One end of the compression spring 342 is fixedly installed on the sliding block 344, and the other end of the compression spring 342 is fixedly installed on the fixed cylinder 325. The push rod 347 is slidably fitted into the connecting pipe 326. One end of each of the two hinge rods 346 is rotatably connected to the push rod 347, and the other end of each of the two hinge rods 346 is rotatably connected to the corresponding sliding block 344. The push sleeve 343 is fitted onto the connecting pipe 326. One end of each of the several push blocks 348 is fixedly installed on the push sleeve 343, and the other end of each of the several push blocks 348 is fixedly installed on the push rod 347. The connecting pipe 326 has a moving hole corresponding to each push block 348.

[0064] Working principle of the invention:

[0065] The rotary motor 22 starts periodically, driving the rotary gear 23 to rotate periodically. The rotary gear 23 drives the rotary chain 21 to rotate, which in turn drives the rotary rod 31 to move. The rotary rod 31 then drives the rotary drum 321 to move, which in turn drives the motor rotor to move. During this movement, the self-rotating motor 53 drives the drive gear 52 to rotate, which in turn drives the self-rotating chain 51 to rotate. The self-rotating chain 51 then drives the self-rotating gear 33 to rotate, which in turn drives the rotary rod 31 to rotate. The rotary rod 31 then drives the rotary drum 321 to rotate. Rotating, the rotary drum 321 drives the motor rotor to rotate, causing the motor rotor to rotate during the movement. The motor rotor moves to below the paint dripping tube 4, and the paint dripping tube 4 drips paint, so that the motor rotor is evenly coated with paint. When the rotary rod 31 moves to the outside of the paint dripping housing 1, the self-rotating gear 33 disengages from the self-rotating chain 51, and the rotary rod 31 and the motor rotor stop rotating. At this time, the motor rotor after being coated with paint is taken out from the rotary drum 321, and the motor rotor without being coated with paint is inserted into the rotary drum 321. The magnetic adsorption block 322 in the rotary drum 321 adsorbs the motor rotor.

[0066] When the rotary rod 31 moves outside the paint dripping housing 1, the push sleeve 343 abuts against the push bar 9 and moves under the push of the inclined surface of the push bar 9. The push sleeve 343 drives the push block 348 to move, the push block 348 drives the push rod 347 to move, the push rod 347 drives the end of the hinge rod 346 to move, the other end of the hinge rod 346 drives the sliding block 344 to move, the two sliding blocks 344 drive the clamping block 341 to move, so that the two clamping blocks 341 move away from each other, and the motor rotor is released from the clamp. At this time, the motor that has been removed from the paint dripping housing 1 can be rotated and removed, and a new motor rotor can be placed in the rotary drum 321. As the new motor rotor moves, the push sleeve 343 disengages from the push bar 9, and the compression spring 342 drives the two clamping blocks 341 to move closer to each other, clamping the motor rotor. The motor rotor moves into the paint dripping housing 1 to perform the paint dripping operation.

[0067] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotor dip painting apparatus comprising a dip painting housing, characterised in that: The paint dripping shell is provided with a rotating assembly, one end of the paint dripping shell is provided with a material port, one end of the rotating assembly is arranged in the paint dripping shell, the other end of the rotating assembly extends to the outside of the paint dripping shell through the material port, a plurality of placing assemblies are arranged on the rotating assembly, the plurality of placing assemblies comprise a rotating rod and a placing unit arranged at both ends of the rotating rod, the placing unit comprises a rotating cylinder and an adsorbing magnetic block, one end of the rotating cylinder is provided with an opening, and the adsorbing magnetic block is fixedly installed in the rotating cylinder. A paint dripping pipe is arranged on the paint dripping shell, the paint dripping pipe is located above the rotating assembly, the paint dripping pipe can uniformly drip paint liquid, and a self-rotation assembly is further arranged in the paint dripping shell, the self-rotation assembly can drive the placing unit in the paint dripping shell to rotate. A supporting side plate is fixedly installed in the paint dripping shell. The placing unit further comprises a fixed cylinder and a connecting pipe, the connecting pipe is fixedly installed on the rotating rod, the fixed cylinder is fixedly installed on the connecting pipe, the rotating cylinder is fixedly installed on the fixed cylinder, a connecting plate is fixedly installed in the rotating cylinder, and the adsorbing magnetic block is fixedly installed on the connecting plate. The placing assembly further comprises a clamping unit, the clamping unit comprises two clamping blocks, two compression springs and a pushing sleeve, the two clamping blocks are located in the rotating cylinder, the two compression springs can drive the two clamping blocks to move close to each other, one end of the supporting side plate close to the opening of the paint dripping shell is fixedly installed with a pushing strip, and the end of the pushing strip is inclined, when the placing assembly moves to the position of the pushing strip, the pushing strip can drive the corresponding pushing sleeve to move, so that the pushing sleeve drives the two clamping blocks to move away from each other.

2. A rotary dip painting apparatus according to claim 1, wherein: The rotating assembly comprises two rotating chains, a rotating motor, a rotating shaft, two rotating auxiliary gears and two rotating gears, the rotating shaft is fixedly installed on the output end of the rotating motor, the two rotating gears are fixedly installed on the rotating shaft, one end of each of the two rotating chains is engaged with the corresponding rotating gear, the other end of each of the two rotating chains is engaged with the corresponding rotating auxiliary gear, and the rotating auxiliary gears are arranged outside the paint dripping shell; a plurality of rotating rods are fixedly installed on the two rotating chains at equal intervals.

3. A rotary dip painting apparatus according to claim 1, wherein: The self-rotation assembly comprises a self-rotation chain, two drive gears, a self-rotation shaft, two drive auxiliary gears and a self-rotation motor, the self-rotation shaft is fixedly installed on the output end of the self-rotation motor, the two drive gears are fixedly installed on the self-rotation shaft, the self-rotation chain is engaged with the drive gears and the drive auxiliary gears, the placing assembly further comprises a self-rotation gear, the self-rotation gear is fixedly installed on the rotating rod, the self-rotation gear is engaged with the self-rotation chain, the self-rotation gear is engaged with the middle part of the self-rotation chain outside the self-rotation chain, and the two drive gears are engaged with the outside of the self-rotation chain inside the self-rotation chain.

4. A rotary dip painting apparatus according to claim 1, wherein: The placing unit further comprises a limiting sleeve and a locking screw rod, the limiting sleeve is inserted into the rotary cylinder, the limiting sleeve is provided with a locking screw hole, the rotary cylinder is provided with a connecting hole, the locking screw rod is threadedly connected into the locking screw hole through the connecting hole, and the rotating block is fixedly installed on the locking screw rod.

5. A rotary dip painting apparatus as defined in claim 1, wherein: The inner top of the paint dripping shell is provided with an electric heater, the top of the paint dripping shell is fixedly communicated with an exhaust pipe, and the exhaust pipe is provided with an exhaust pump.

6. A rotary dip painting apparatus according to claim 3, wherein: The rotation shaft and the rotation axis are both rotationally connected to the support side plate, the driving auxiliary gear is rotationally connected to the rotation shaft, the rotation auxiliary gear is fixedly installed with an auxiliary shaft, and the auxiliary shaft is rotationally connected to the support side plate.

7. A rotary dip painting apparatus as defined in claim 1, wherein: The paint dripping shell is provided with a fixing rod, a paint tank, a peristaltic pump and a paint supply pipe, the paint dripping pipe is fixedly installed on the fixing rod, the paint supply pipe is fixedly and communicatively connected to the paint dripping pipe, the input end of the peristaltic pump is connected to the paint tank, and the output end of the peristaltic pump is fixedly and communicatively connected to the paint supply pipe.

8. A method for painting a rotor of an electrical machine using a rotor painting apparatus according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: The rotation assembly drives all the placing assemblies to move along the annular path; When the placing unit moves to the position directly below the paint dripping pipe along with the rotation assembly, the paint dripping pipe drips paint to the surface of the motor rotor at a constant flow rate; The rotation cylinder of the placing unit is driven by the rotation assembly to rotate around its own axis, thereby driving the motor rotor to rotate at a constant speed to complete the uniform coating of the paint; After the paint dripping is completed in the paint dripping shell, the shell is removed from the shell through the material opening; The motor rotor after the paint dripping is completed is taken out from the rotation cylinder, a new motor rotor is inserted into the open end of the rotation cylinder, and the new motor rotor is fixedly adsorbed by the adsorbing magnetic block.

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