Outer rotor motor shell structure and processing device thereof

Abstract

The application relates to the motor processing technical field and discloses an outer rotor motor shell structure and a processing device thereof, and aims to solve the problem that bubbles block paint liquid from fully contacting the inner wall surface of the shell, thereby affecting the paint dipping quality of the outer rotor motor shell. Through the arrangement of a spraying and sucking mechanism, the paint liquid overflows the shell, the spraying and sucking port reciprocally sprays and sucks the paint liquid in the inner cavity of the shell, the bubbles in the inner cavity of the shell are forced to be disturbed, the paint liquid completely wets the inner wall of the shell, the paint dipping quality of the shell is not easily affected, through the arrangement of a rotating mechanism, a plug-in station is inserted into the center hole of the bottom wall of the shell and drives the shell to rotate, the bubbles in the shell are disturbed, the bubbles are prevented from being fixed for a long time, the paint liquid completely wets the inner wall of the shell, and the paint dipping quality of the shell is not easily affected.

Description

Technical Field

[0001] This application relates to the field of motor processing technology, and in particular to an external rotor motor housing structure and its processing device. Background Technology

[0002] An external rotor motor is a type of motor with an external rotor and an internal stator. It is widely used in electric vehicles and other fields. However, the housing of an existing external rotor motor needs to be impregnated with paint during processing to give the motor housing functions such as rust prevention.

[0003] Some existing external rotor motor housing impregnation devices typically involve placing the motor housing into an impregnation tank to ensure full contact between the paint and the housing wall. Afterward, the housing is removed and cured to fix the paint onto the housing, thus achieving the impregnation process.

[0004] However, in the above process, although the bottom wall of the outer casing has a central hole, when the paint enters the inner cavity of the outer casing (regardless of whether the opening of the outer casing faces upward or downward), the paint cannot push all the air in the inner cavity of the outer casing out. As a result, the air bubbles formed prevent the paint from fully contacting the inner wall surface of the outer casing, thus affecting the impregnation quality of the outer rotor motor casing. Summary of the Invention

[0005] This application proposes an external rotor motor housing structure and its processing device, which has the advantage of reducing the amount of air bubbles retained in the inner cavity of the housing, thereby solving the problem that air bubbles prevent the paint from fully contacting the inner wall of the housing and affecting the quality of the paint impregnation of the external rotor motor housing.

[0006] To achieve the above objectives, this application adopts the following technical solution: a processing device for an external rotor motor housing structure, used for processing an external rotor motor housing, comprising: a housing, wherein a central hole is provided at the center of the bottom wall of the housing; The processing device includes a workbench, on which immersion tanks are fixedly mounted at equal intervals on the upper side. The outer shell is placed inside the immersion tank. A cap is fixedly and sealed at the upper opening of the immersion tank. A liquid guiding valve is fixedly and connected to the bottom of the outer side of the immersion tank, connecting the immersion tank to an external infusion-extraction mechanism. A spray-suction mechanism is installed on both the inner cavity of the immersion tank and the upper side of the cap. The spray-suction mechanism includes: The insert rod is fixedly installed at the center of the lower side of the cover, and the lower end of the insert rod extends into the inner cavity of the outer shell; The suction nozzle is located at the lower end of the insertion rod; A liquid pump is fixedly installed on the upper side of the cap; The outer tube and the inner tube are respectively connected and installed on both working ends of the spray suction pump. The outer tube extends into the cavity between the paint impregnation tank and the outer shell, and the inner tube extends into the insertion rod and is connected to the spray suction port.

[0007] Furthermore, the interior of the impregnation tank is provided with a rotating mechanism, which includes: An insertion platform is located at the center of the inner wall at the bottom of the impregnation tank. The insertion platform consists of a small-diameter cylinder, a frustum, and a large-diameter cylinder from top to bottom. The small-diameter cylinder is inserted into the central hole of the outer shell, and the minimum diameter of the frustum is equal to the diameter of the central hole of the outer shell.

[0008] Furthermore, the rotating mechanism also includes: The gearbox is sealed and fixedly installed at the center of the bottom wall of the paint impregnation tank, and the insertion platform is connected to the output end of the gearbox for transmission. The motor is fixedly mounted on the lower side of the gearbox, and the motor is a forward and reverse reversible motor.

[0009] Furthermore, the rotating mechanism also includes: The clamping blocks are circumferentially equidistantly arranged inside the small-diameter cylinder of the insertion platform. The outer surface of the clamping blocks is a rubber layer structure. When the clamping blocks are partially extended, there is a circumferential distance between the extended parts of adjacent clamping blocks. Spring No. 1 is installed inside the insertion platform and located in the cavity where the abutment block is located. Spring No. 1 is fixedly connected to the inner side of the abutment block and the insertion platform. The vent hole is located in the center of the insertion platform. The upper branch hole of the vent hole connects to the cavity where the No. 1 spring is located, and the lower end of the vent hole connects to the space inside the gearbox.

[0010] Furthermore, the rotating mechanism also includes: The stirring rod is fixedly installed circumferentially at equal intervals on the side of the large-diameter cylinder of the insertion platform.

[0011] Furthermore, the stirring rod is configured as a permanent magnet to adsorb metal debris in the paint liquid.

[0012] Furthermore, a support mechanism is provided on the inner wall of the impregnation tank, the support mechanism comprising: Arc-shaped strips are arranged circumferentially at equal intervals on the outer side of the shell, alternating vertically. The slide bar is fixedly installed on the side of the curved strip facing away from the outer casing; A fixed rod is slidably installed in the inner cavity of the slide rod, and one end of the fixed rod facing the inner wall of the paint dipping tank is fixedly connected to the inner wall of the paint dipping tank. The second spring is installed in the inner cavity of the slide rod, and the second spring is fixedly connected to the end of the fixed rod facing the outer shell and the inner wall of the slide rod respectively; A through hole is provided, which connects the interior of the fixing rod with the interior of the paint impregnation tank, and the through hole connects the external environment with the inner cavity of the sliding rod.

[0013] Furthermore, the support mechanism also includes: The ball bearings are circumferentially and equidistantly mounted on the side of the arc-shaped strip facing the outer shell. The ball bearings and the interior of the arc-shaped strip adopt a fully sealed structure and are filled with high-temperature resistant grease.

[0014] This application has the following beneficial effects: This application provides an external rotor motor housing structure and its processing device. By setting up a spray suction mechanism, the paint liquid is allowed to flow over the housing while the spray suction port reciprocates to spray the paint liquid inside the housing cavity, forcibly disturbing the air bubbles inside the housing cavity, so that the paint liquid completely wets the inner wall of the housing, making the paint impregnation quality of the housing less likely to be affected.

[0015] By using a rotating mechanism, the insertion platform is inserted into the center hole of the bottom wall of the outer casing, causing the outer casing to rotate. This disturbs the air bubbles inside the outer casing, preventing them from remaining fixed for a long time. This allows the paint to completely soak the inner wall of the outer casing, making the paint impregnation quality of the outer casing less susceptible to damage.

[0016] By setting up a rotating mechanism and a support mechanism, and with the design of the elastically telescopic arc-shaped strips arranged in an alternating pattern, the circumferential flexible full-wrap limit of the outer shell is achieved. The ball bearings on the side of the arc-shaped strips achieve rolling contact without sliding wear, and will not scratch the outer wall of the outer shell. The alternating arc-shaped segments, together with the rotating outer shell, eliminate large-area paint impregnation dead corners with fixed contact, and greatly improve the continuity of the paint film on the outer wall. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0018] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the fitting state of the varnish dipping tank and the cap of the present invention; Figure 3 This is a schematic diagram of the internal structure of the impregnation tank of the present invention; Figure 4 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 5 This is a schematic diagram showing the location of the support mechanism of the present invention; Figure 6 This is a schematic diagram of the internal structure of the insertion platform of the present invention; Figure 7 This is a schematic diagram of the supporting structure of the present invention.

[0019] In the diagram: 1. Outer shell; 2. Workbench; 3. Dipping tank; 4. Cover; 5. Liquid guiding valve; 6. Spray suction mechanism; 60. Insert rod; 61. Spray suction port; 62. Spray suction liquid pump; 63. Outer tube; 64. Inner tube; 7. Rotating mechanism; 70. Insertion platform; 71. Gearbox; 72. Motor; 73. Clamping block; 74. Spring No. 1; 75. Vent hole; 76. Stirring rod; 8. Support mechanism; 80. Arc-shaped strip; 81. Slide rod; 82. Fixed rod; 83. Spring No. 2; 84. Through hole; 85. Ball bearing. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Example 1: Please refer to Figure 4 An external rotor motor housing structure includes a housing 1, which is a cold-rolled steel sheet stamped and stretched housing. The inner wall of the housing 1 is provided with mounting grooves at equal intervals around the circumference for mounting permanent magnets. A central hole is provided at the center of the bottom wall of the housing 1.

[0022] Please see Figures 1-7 A processing device for an external rotor motor housing structure includes a worktable 2. Impregnation tanks 3 are fixedly mounted equidistantly on the upper side of the worktable 2. The housing 1 is placed inside the impregnation tank 3. A cap 4 is fixedly and sealed at the upper opening of the impregnation tank 3. A liquid guiding valve 5 is fixedly and connected to the bottom of the outer side of the impregnation tank 3, connecting the impregnation tank 3 to an external liquid delivery-suction mechanism. A spray suction mechanism 6 is installed together with the upper side of the cap 4 inside the impregnation tank 3. The spray suction mechanism 6 includes a rod 60. The cover 4 has a spray nozzle 61, a spray pump 62, an outer tube 63 and an inner tube 64. A rod 60 is fixedly installed at the center of the lower side of the cover 4. The lower end of the rod 60 extends into the inner cavity of the outer shell 1. The lower end of the rod 60 has a spray nozzle 61. A spray pump 62 is fixedly installed on the upper side of the cover 4. The two working ends of the spray pump 62 are respectively connected to the outer tube 63 and the inner tube 64. The outer tube 63 extends into the cavity between the paint impregnation tank 3 and the outer shell 1. The inner tube 64 extends into the rod 60 and communicates with the spray nozzle 61.

[0023] In use, firstly, paint is supplied to the impregnation tank 3 through the liquid delivery valve 5. Then, the liquid delivery valve 5 is closed, and the outer casing 1 is placed into the impregnation tank 3 with its opening facing upwards using an external robotic arm. When the outer casing 1 reaches the bottom wall of the impregnation tank 3, the robotic arm is removed, and the impregnation tank 3 is sealed with the cap 4. During the closing of the cap 4, the insertion rod 60 is inserted into the inner cavity of the outer casing 1. Then, the spray-suction pump 62 is activated, repeatedly spraying and suctioning paint. When in spraying mode, the spray-suction pump 62 draws paint through the outer pipe 63. Paint liquid is taken from between the impregnation tank 3 and the outer shell 1 and introduced into the inner cavity of the outer shell 1 through the inner tube 64 and the spray nozzle 61. This causes some of the paint liquid in the inner cavity of the outer shell 1 to be pushed and discharged to the position between the impregnation tank 3 and the outer shell 1. When in the suction state, the spray suction pump 62 draws the paint liquid in the inner cavity of the outer shell 1 through the inner tube 64 and the spray nozzle 61, causing the paint liquid on the outer side of the upper port of the outer shell 1 to be replenished. This process is repeated to forcibly disturb the air bubbles in the inner cavity of the outer shell 1, so that the paint liquid completely wets the inner wall of the outer shell 1, making the impregnation quality of the outer shell 1 less likely to be affected. After a period of time, the liquid pump 62 is stopped and the cover 4 is opened. The outer shell 1 is removed by reaching into the paint tank 3 with an external robotic arm.

[0024] Example 2: Please refer to Figures 1-7 The impregnation tank 3 is equipped with a rotating mechanism 7. The rotating mechanism 7 includes a platform 70, which is located at the center of the bottom inner wall of the impregnation tank 3. The platform 70 consists of a small diameter cylinder, a frustum, and a large diameter cylinder from top to bottom. The small diameter cylinder is inserted into the center hole of the outer shell 1, and the minimum diameter of the frustum is equal to the diameter of the center hole of the outer shell 1.

[0025] During the process of the external robotic arm placing the outer shell 1 into the paint dipping tank 3, the center hole of the outer shell 1 is aligned with the insertion platform 70, and the outer shell 1 is finally placed on the small-diameter cylinder of the insertion platform 70. This creates a space between the bottom surface of the outer shell 1 and the bottom surface of the paint dipping tank 3, which is separated by the insertion platform 70. This allows the paint to completely soak the bottom surface of the outer shell 1, making the paint dipping quality of the outer shell 1 less susceptible to damage.

[0026] Please see Figures 1-7The rotating mechanism 7 also includes a reduction gearbox 71, a motor 72, a retaining block 73, a first spring 74, and a vent 75. The reduction gearbox 71 is sealed and fixedly installed at the center of the bottom wall of the impregnation tank 3. The insertion platform 70 is connected to the output end of the reduction gearbox 71. The motor 72 is fixedly installed on the lower side of the reduction gearbox 71. The motor 72 is a forward and reverse motor. The retaining block 73 is circumferentially and equidistantly slidably installed inside the small-diameter cylinder of the insertion platform 70. The outer surface of the retaining block 73 is a rubber layer structure. When the retaining block 73 is partially extended, there is a circumferential distance between the extended parts of adjacent retaining blocks 73. A first spring 74 is installed inside the insertion platform 70 and in the cavity where the retaining block 73 is located. The first spring 74 is fixedly connected to the inner surface of the retaining block 73 and the insertion platform 70. A vent 75 is opened at the center of the insertion platform 70. The upper branch hole of the vent 75 is connected to the cavity where the first spring 74 is located. The lower end of the vent 75 is connected to the space inside the reduction gearbox 71.

[0027] After the insertion platform 70 is inserted into the center hole of the outer shell 1 and the cap 4 seals the impregnation tank 3, the spray suction pump 62 and the motor 72 are made to run synchronously, so that the insertion platform 70 performs forward and reverse reciprocating motion (both forward and reverse motion lasts for a period of time), so that the clamping block 73 is subjected to centrifugal force, which in turn stretches the corresponding No. 1 spring 74 and extends it, so that the rubber layer of the clamping block 73 contacts and presses against the hole wall of the center hole of the outer shell 1. Then, the friction between the clamping block 73 and the outer shell 1 drives the outer shell 1 to rotate forward and reverse, so that the air bubbles inside the outer shell 1 are disturbed, preventing the air bubbles from being fixed for a long time, allowing the paint to completely wet the inner wall of the outer shell 1, so that the impregnation quality of the outer shell 1 is not easily affected. Meanwhile, the reciprocating suction of the aforementioned nozzle 61 creates forced turbulence within the inner cavity. Combined with the centrifugal force of the synchronous rotation of the outer shell 1, this counteracts the paint dripping caused by gravity, resulting in a lower deviation in the uniformity of the paint film thickness within the outer shell 1. This improves the consistency of the paint film and enhances the coating quality of the outer shell 1. (The critical condition for dripping is that the gravitational component of the wet paint film along the wall surface is greater than the adhesion between the paint film and the inner wall of the outer shell 1 plus the cohesive force of the paint film itself. In this case, the outer shell 1 rotates synchronously around a vertical axis. Every part of the paint on the cylindrical wall of the inner cavity is subjected to a centrifugal force perpendicular to the direction of gravity and radially outward. This force firmly presses the wet paint film onto the inner wall, generating continuous radial positive pressure.) The circumferentially distributed clamping blocks 73 ensure a small coaxiality between the outer shell 1 and the insertion platform 70. During rotation, the centrifugal force on the inner cavity wall is circumferentially uniform, preventing uneven force on one side and circumferential paint accumulation. The fillers and solids in the paint... The chemical particles, under the influence of gravity, will naturally sink, resulting in a high solid content and thicker paint film at the bottom, and a low solid content and thinner paint film at the top. However, the centrifugal force of forward and reverse rotation will make the particles in the paint liquid evenly dispersed circumferentially and radially. Combined with the continuous rotational motion, it completely avoids gravity sedimentation, ensuring that the solid content and viscosity of the paint liquid are consistent throughout the entire inner cavity, eliminating the hidden danger of thickness deviation from the material properties. The paint liquid sprayed from the suction port 61 will form an upward forced flow along the inner wall, directly and continuously transporting the paint liquid at the bottom of the outer shell 1 to the top of the opening end, accurately replenishing the paint liquid lost at the top due to gravity, and preventing the top paint film from being too thin. When the suction port 61 is suctioning, it will prioritize suctioning from the bottom of the inner cavity of the outer shell 1, directly removing the excess paint liquid and accumulated liquid at the bottom, preventing the bottom paint film from being too thick from the root. The reciprocating spraying and suction action is equivalent to forming a continuous axial circulation of "bottom → top → bottom" in the inner cavity, completely breaking the static distribution of insufficient paint at the top and accumulated paint at the bottom in static dipping. Furthermore, the circumferentially equidistant and axially fully interconnected slit channels between the circumferentially distributed clamping blocks 73 allow the paint to flow and flush within the channels, preventing paint from seeping between the clamping blocks 73 and the central hole wall of the outer casing 1, thus preventing the contact surfaces from hardening and sticking together. (These slit channels form low-pressure drainage channels, fundamentally preventing paint from seeping into the contact surfaces. When the clamping blocks 73 extend, the rubber layer adheres tightly to the inner wall of the central hole, forming a circumferentially continuous sealing boundary, dividing the inner wall of the central hole into two areas: the "high-pressure sealing contact area" where the rubber is adhered, and the adjacent clamping block 73.) In the "low-pressure open gap zone" between 3, the positive and negative pressure of the inner cavity generated by the spray suction action and the flow pressure of the paint liquid face two paths: the axial through gap with extremely low flow resistance and the rubber bonding surface with contact pressure much greater than fluid pressure and almost no flow capacity. The paint liquid will preferentially flow from the gap channel and will not attempt to penetrate into the bonding surface between the rubber and the central hole. This eliminates the possibility of the paint liquid entering the contact surface between the two from the root, and avoids the paint liquid being squeezed into the micro-bonding gap between the rubber and the central hole. After curing, it will directly form an irreversible sticking, causing the insertion platform 70 to stop rotating and the rubber to separate from the central hole. Meanwhile, the reciprocating flow of the paint in the gap channel creates a continuous edge scouring effect, thoroughly cleaning up any trace amounts of residual paint: the positive pressure in the inner cavity drives the paint to flow downwards from the gap into the bottom of the impregnation tank 3, scouring the trace amounts of paint on the sides of the pressing block 73 and the edges of the rubber layer; the negative pressure in the inner cavity drives the paint to flow upwards from the gap into the inner cavity of the outer shell 1, scouring the residual paint on the edges of the contact surface again. Even if a very small amount of paint gets on the edge of the rubber layer, it will be continuously flushed back into the gap by the reciprocating flow of paint, and then carried to the inner cavity of the outer shell 1 or the bottom of the impregnation tank 3, without remaining between the bonding surfaces to cure. Meanwhile, since the paint sprayed from the suction nozzle 61 cannot cover the area around the central hole at the bottom of the inner cavity of the outer casing 1, under the positive pressure drive of the inner cavity, when the paint is sprayed downward through the gap channel between the adjacent pressing blocks 73, it will form a 360° uniform radial sweep at the bottom of the inner cavity, which will move all the still paint in the dead corners and form a full coverage with the paint flow from the suction nozzle 61, thereby further improving the coating quality of the outer casing 1 (the paint sprayed from the suction nozzle 61 will be quickly thrown towards the cylindrical wall of the inner cavity of the outer casing 1 under the action of centrifugal force). The surface forms a tornado-like flow field with a high-speed, wall-hugging flow on the outer perimeter and a low-pressure stagnation zone in the center: more than 90% of the fluid energy is concentrated in the spiral flow on the circumferential wall, while the fluid velocity in the bottom center region is low, forming a stagnation zone, which makes the paint in this region have poor fluidity. The circumferentially distributed slit channels are axially connected flow channels, with the upper end connected to the periphery of the central hole at the bottom of the inner cavity of the outer shell 1 and the lower end connected to the bottom of the paint dipping tank 3. When the spray nozzle 61 sprays out and a positive pressure is formed in the inner cavity, the paint will be driven by the positive pressure and continuously flow towards the slit channels in the center. This creates a uniform 360° radial sweep flow along the bottom plane of the inner cavity, from the outer periphery to the center. The radial sweep flow continues from the bottom edge of the inner cavity of the outer shell 1 all the way to the entrance of the central gap. There are no stagnant areas on the entire bottom plane. The dead zone around the central hole is precisely the core flow path of the sweep flow. The paint continuously washes over these areas, squeezing out all the trapped air and completely filling all gaps, achieving 100% wetting. The stronger the swirling flow ejected from the suction nozzle 61, the higher the positive pressure in the inner cavity, and the greater the flow velocity of the gap sweep flow, effectively washing away dead corners. The better the effect, the lower the swirling intensity and the lower the sweeping flow rate under low-speed wetting conditions. This prevents uneven paint film caused by excessive flow rate and fully adapts to the working conditions. The gap sweeping flow reinforces the uniform paint effect of the central swirling flow. The sweeping flow continuously removes old paint and air bubbles from the bottom of the inner cavity, allowing fresh paint to continuously replenish the bottom of the inner cavity. Then, the central swirling flow carries the paint to the entire inner cavity wall, ensuring that the solid content and viscosity of the paint in the entire inner cavity are uniform throughout the process. The uniformity deviation of the paint film thickness can be controlled within 3%, which is far superior to conventional swirling impregnation.

[0028] Please see Figures 1-7 The rotating mechanism 7 also includes a stirring rod 76, which is circumferentially and equidistantly fixed on the side of the large-diameter cylinder of the insertion platform 70.

[0029] During the process of the insertion platform 70 driving the outer shell 1 to rotate in both directions, the insertion platform 70 drives the stirring rod 76 to rotate synchronously, so that the stirring rod 76 is at the bottom of the paint dipping tank 3 and located below the outer shell 1 to stir, thereby avoiding the sedimentation of paint filler, ensuring that the viscosity and solid content of the paint in the whole tank are uniform throughout the process, and improving the consistency of the paint film of batch products. At the same time, the rotating stirring rod 76 will drive the air bubbles on the bottom surface of the outer shell 1 to move towards the side wall of the paint dipping tank 3, thereby allowing the paint to completely wet the inner wall of the outer shell 1, so that the paint dipping quality of the outer shell 1 is not easily affected.

[0030] Please see Figures 1-7 The stirring rod 76 is a permanent magnet structure.

[0031] Part of the paint drawn by the suction nozzle 61, during the positive pressure stage of the inner cavity (when the suction nozzle 61 is spraying), will be discharged downward to the bottom of the paint tank 3 through the space between the adjacent pressing blocks 73, and then contact the stirring rod 76. This causes the metal debris in the paint to be adsorbed by the stirring rod 76, while the clean paint is then drawn back into the inner cavity of the outer shell 1, forming a closed loop of inner cavity suction - impurity discharge - outer filtration - clean paint replenishment, which completely avoids the problem of metal debris scratching the inner wall of the outer shell 1 and clogging the suction nozzle 61.

[0032] Example 3: Please refer to Figures 1-7 A support mechanism 8 is provided on the inner wall of the paint impregnation tank 3. The support mechanism 8 includes an arc-shaped strip 80, a sliding rod 81, a fixed rod 82, a second spring 83, and a through hole 84. The arc-shaped strip 80 is arranged circumferentially and staggered vertically on the outer side of the outer shell 1. The sliding rod 81 is fixedly installed on the side of the arc-shaped strip 80 facing away from the outer shell 1. The fixed rod 82 is slidably installed in the inner cavity of the sliding rod 81. One end of the fixed rod 82 facing the inner wall of the paint impregnation tank 3 is fixedly connected to the inner wall of the paint impregnation tank 3. The inner cavity of the sliding rod 81 is provided with a second spring 83. The second spring 83 is fixedly connected to the end of the fixed rod 82 facing the outer shell 1 and the inner wall of the sliding rod 81. The interior of the fixed rod 82 and the interior of the paint impregnation tank 3 are connected by a through hole 84, which connects the external environment and the inner cavity of the sliding rod 81.

[0033] During the process of the robotic arm placing the outer shell 1 into the paint dipping tank 3, the outer shell 1 will enter the enclosure of the arc-shaped strip 80. Through the design of the elastically stretchable arc-shaped strip 80 arranged in an alternating pattern, the circumferential flexible full-wrap limit of the outer shell 1 is achieved. The alternating arc-shaped strip 80, together with the rotating outer shell 1, eliminates the large-area paint dipping dead corners of fixed contact and improves the continuity of the paint film on the outer wall of the outer shell 1.

[0034] Please see Figures 1-7 The support mechanism 8 also includes ball bearings 85, which are circumferentially and equidistantly mounted on the side of the arc strip 80 facing the outer casing 1. The ball bearings 85 and the arc strip 80 have a fully sealed internal structure and are filled with high-temperature resistant grease.

[0035] Rolling contact without sliding wear is achieved through the ball bearings 85 on the side of the arc-shaped strip 80, which will not scratch the outer wall of the outer casing 1. At the same time, the ball bearings 85 and the interior of the arc-shaped strip 80 adopt a fully sealed structure, which is filled with high-temperature resistant grease to prevent paint from seeping into it and avoid the ball bearings 85 from getting stuck.

Claims

1. A processing apparatus for an external rotor motor housing structure, used for processing an external rotor motor housing, comprising: The outer shell (1) has a central hole at the center of the bottom wall; The processing device includes a workbench (2), on which an impregnation tank (3) is fixedly installed at equal intervals on the upper side of the workbench (2). The outer shell (1) is placed in the inner cavity of the impregnation tank (3). A cap (4) is fixedly installed at the upper opening of the impregnation tank (3). A liquid guiding valve (5) is fixedly installed at the bottom of the outer side of the impregnation tank (3). The liquid guiding valve (5) connects the impregnation tank (3) with an external liquid delivery-suction mechanism. The device is characterized in that a spray suction mechanism (6) is installed together on the inner cavity of the impregnation tank (3) and the upper side of the cap (4). The spray suction mechanism (6) includes: The insert rod (60) is fixedly installed at the center of the lower side of the cover (4), and the lower end of the insert rod (60) extends into the inner cavity of the outer shell (1); The suction port (61) is located at the lower end of the insert rod (60); A liquid pump (62) is fixedly installed on the upper side of the cover (4); The outer tube (63) and the inner tube (64) are respectively connected and installed on both working ends of the spray suction pump (62). The outer tube (63) extends into the cavity between the paint impregnation tank (3) and the outer shell (1). The inner tube (64) extends into the insertion rod (60) and is connected to the spray suction port (61).

2. The processing device for an external rotor motor housing structure according to claim 1, characterized in that, The impregnation tank (3) is equipped with a rotating mechanism (7), which includes: The insertion platform (70) is located at the center of the inner wall of the bottom of the paint dipping tank (3). The insertion platform (70) consists of a small diameter cylinder, a frustum and a large diameter cylinder from top to bottom. The small diameter cylinder is inserted into the center hole of the outer shell (1), and the minimum diameter of the frustum is equal to the diameter of the center hole of the outer shell (1).

3. The processing apparatus for an external rotor motor housing structure according to claim 2, characterized in that, The rotating mechanism (7) further includes: The gearbox (71) is sealed and fixedly installed at the center of the bottom wall of the paint impregnation tank (3), and the insertion platform (70) is connected to the output end of the gearbox (71) in a transmission connection. The motor (72) is fixedly installed on the lower side of the gearbox (71), and the motor (72) is a forward and reverse reversible motor.

4. The processing apparatus for an external rotor motor housing structure according to claim 3, characterized in that, The rotating mechanism (7) further includes: The abutting blocks (73) are circumferentially equidistantly arranged inside the small-diameter cylinder of the insertion platform (70). The outer surface of the abutting blocks (73) is a rubber layer structure. When the abutting blocks (73) are partially extended, there is a circumferential distance between the extended parts of adjacent abutting blocks (73). A first spring (74) is set inside the insertion platform (70) and located in the cavity where the abutment block (73) is located. The first spring (74) is fixedly connected to the inner side of the abutment block (73) and the insertion platform (70). A vent (75) is located in the center of the insert (70). The upper branch hole of the vent (75) is connected to the cavity where the first spring (74) is located. The lower end of the vent (75) is connected to the space inside the gearbox (71).

5. The processing apparatus for an external rotor motor housing structure according to claim 4, characterized in that, The rotating mechanism (7) further includes: The stirring rod (76) is fixedly installed circumferentially at equal intervals on the side of the large-diameter cylinder of the insertion platform (70).

6. The processing apparatus for an external rotor motor housing structure according to claim 5, characterized in that, The stirring rod (76) is a permanent magnet structure used to adsorb metal debris in the paint liquid.

7. The processing apparatus for an external rotor motor housing structure according to claim 1, characterized in that, The inner wall of the impregnation tank (3) is provided with a support mechanism (8), the support mechanism (8) comprising: Arc-shaped strips (80) are arranged circumferentially and alternately on the outside of the outer shell (1); The slide bar (81) is fixedly installed on the side of the arc strip (80) facing away from the outer casing (1); A fixed rod (82) is installed in the inner cavity of the slide rod (81) in a sealed sliding manner. One end of the fixed rod (82) facing the inner wall of the paint dipping tank (3) is fixedly connected to the inner wall of the paint dipping tank (3). The second spring (83) is set in the inner cavity of the slide rod (81). The second spring (83) is fixedly connected to the end of the fixing rod (82) facing the outer shell (1) and the inner wall of the slide rod (81); A through hole (84) is provided, which connects the interior of the fixing rod (82) and the interior of the paint dipping tank (3). The through hole (84) connects the external environment and the inner cavity of the slide rod (81).

8. The processing apparatus for an external rotor motor housing structure according to claim 7, characterized in that, The support mechanism (8) also includes: The ball bearing (85) is circumferentially and equidistantly mounted on the side of the arc strip (80) facing the outer shell (1). The ball bearing (85) and the interior of the arc strip (80) adopt a fully sealed structure and are filled with high-temperature resistant grease.

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