Powder coating tool for inner wall of stator shell of starter generator

Abstract

The invention discloses a powder coating tool for the inner wall of a stator shell of a starter generator, and belongs to the technical field of starter generator manufacturing, the coating tool comprises a lower cover assembly and a mounting plate which are vertically arranged at an interval, and a plurality of guide rods are arranged between the lower cover assembly and the mounting plate; an air cylinder is arranged on the mounting plate, and a piston rod of the air cylinder is vertically arranged and connected with a mandrel assembly and an upper cover assembly; the lower cover assembly, the mandrel assembly and the upper cover assembly are ventilated and liquid-filled, the lower cover assembly and the upper cover assembly respectively blow away powder on upper and lower spigots and upper and lower end faces of a generator stator shell, and the mandrel assembly blows away powder on the inner wall and the upper portion of a pole shoe, so that the technical requirements of the powder coating process of the starting generator stator shell are met. In the whole powder coating machining process, an external cooling liquid source circulates in the lower cover assembly, the mandrel assembly and the upper cover assembly, the temperature, transmitted to the tool, of the stator shell of the starter generator is taken away, and the powder adhesion problem caused by overheating of the tool is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of starter generator manufacturing, and in particular relates to a powder coating tool for the inner wall of a stator shell of a starter generator. Background Art

[0002] In the manufacturing process of the starter generator stator housing, powder coating is a crucial process step, which is directly related to the product's appearance quality, corrosion resistance and overall performance. The traditional coating tool design follows the basic principle: the stator housing workpiece to be coated is accurately placed in the tool, and the tool structure is designed to shield the non-sprayed part of the housing, leaving only the parts that need to be sprayed exposed for uniform adhesion of the powder coating. This design is intended to ensure the accuracy and efficiency of the coating process.

[0003] However, in actual operation, traditional coating tools face two major technical challenges. First, in order to facilitate the rapid installation and removal of the workpiece, a certain gap between the tool and the stator housing is inevitably reserved. These tiny gaps become channels for powder penetration during the coating process, causing the non-spraying area to be accidentally contaminated with powder, seriously affecting the appearance quality of the product and increasing the difficulty and cost of subsequent cleaning work.

[0004] Secondly, the stator housing usually needs to be preheated to a certain high temperature before coating to promote good adhesion of the powder coating. In continuous production line operation, as the workpieces continue to enter the coating area, their accumulated heat will be transferred to the tooling. Since traditional tooling lacks an effective heat dissipation mechanism, the temperature inside the tooling gradually increases, causing some powders to prematurely solidify or adhere when contacting the tooling surface, which not only affects the uniformity and adhesion of the coating, but may also cause contamination of the tooling itself, further reducing the coating yield. Summary of the invention

[0005] In view of the above-mentioned problems in the prior art, the present invention aims to provide a powder coating tool for the inner wall of the stator casing of the starter generator, which solves the problems of accidental contamination of powder in non-spraying areas of the existing powder coating tool and premature solidification or adhesion of some powder when contacting the tool surface, causing poor coating.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows: a powder coating tool for the inner wall of the stator housing of a starter generator is provided, which includes a lower cover assembly and a mounting plate arranged vertically at intervals, and a plurality of guide rods are arranged between the lower cover assembly and the mounting plate; a cylinder is arranged on the mounting plate, and a piston rod of the cylinder is arranged vertically and a core shaft assembly and an upper cover assembly are connected thereto;

[0007] The lower cover assembly includes a guide seat, which is a circular cylindrical structure. The top of the guide seat is provided with a first circular mounting groove for matching with the lower end surface of the starter generator stator housing, and a lower stop matching plate is provided in the first circular mounting groove; two bases are symmetrically provided on the circumferential outer wall of the guide seat; a first air cavity and a first liquid cavity which are independent of each other and both have a circular cavity structure are provided in the circumferential wall of the guide seat, and a plurality of first air outlet holes connected with the first air cavity are provided at the bottom of the first circular mounting groove, and an air source connecting seat and a liquid connecting seat are provided on the circumferential outer wall of the guide seat; a first air inlet channel connected with the first air cavity is provided in the air source connecting seat, and the first air inlet channel is connected with an external compressed air source; a first liquid inlet channel and a first liquid outlet channel connected with the first liquid cavity are provided on the liquid connecting seat, and the first liquid inlet channel and the first liquid outlet channel are connected with an external cooling liquid source;

[0008] The mandrel assembly is used to blow away excess powder on the inner wall and upper part of the pole shoe and cool itself;

[0009] The cylinder drives the upper cover assembly to press and fix the top of the starter generator stator shell, and the upper cover assembly blows away the powder on the upper end surface and the upper stop of the starter generator stator shell and cools itself.

[0010] The process of powder coating of the starter generator stator shell is to ensure that there is no powder attached to the upper and lower stoppers, upper and lower end faces and the inner walls of the four pole shoes of the starter generator stator shell, and the remaining inner walls are attached with powder. The processing conditions are to preheat the starter generator stator shell to about 200℃, put it into the spraying tooling and spray the powder, and the powder melts and adheres to the inner wall after contacting the inner wall, completing the powder coating work of the inner wall of the starter generator stator shell.

[0011] The working principle of the powder coating tooling for the inner wall of the starter generator stator housing in the present invention is: first, the external compressed air source and the external coolant source are connected to the lower cover assembly, the core shaft assembly and the upper cover assembly, and then the preheated starter generator stator housing is placed in the first circular installation groove, and the lower stopper at the bottom of the starter generator stator housing is matched with the lower stopper matching plate in the first circular installation groove to fix the bottom of the starter generator stator housing; then the cylinder is started, and the piston rod of the cylinder drives the core shaft assembly and the upper cover assembly to be respectively located on the inner wall of the pole shoe and the top of the starter generator stator housing, The lower cover assembly, the mandrel assembly and the upper cover assembly are ventilated and fluidized. At the same time, the driving device places the entire tooling with the starter generator stator housing fixed thereon into the powder barrel. The ventilated lower cover assembly and the upper cover assembly blow away the powder on the upper and lower stops and upper and lower end faces of the generator stator housing respectively. The ventilated mandrel assembly blows away the powder on the inner wall of the pole shoe and the upper part, meeting the technical requirements of the powder coating process for the starter generator stator housing. After the coating is completed, the coating tooling leaves the powder barrel, the piston rod of the cylinder retracts, driving the mandrel assembly and the upper cover assembly to move upward, and the starter generator stator housing is taken out, and the powder coating process is completed. During the entire powder coating process, the external coolant source circulates in the lower cover assembly, the mandrel assembly and the upper cover assembly, taking away the temperature of the starter generator stator housing transferred to the tooling, avoiding the problem of powder adhesion caused by overheating of the tooling.

[0012] Further, as a specific setting mode of the upper cover assembly, the upper cover assembly includes an upper guide plate, the middle part of the upper guide plate is fixedly connected to the core shaft assembly, the two sides of the upper guide plate are slidably matched with the guide rod through a sleeve, the lower end surface of the upper guide plate is fixedly connected with a connecting cylinder, the core shaft assembly is located inside the connecting cylinder, the bottom of the connecting cylinder is connected with an upper fixed seat, the upper fixed seat is a circular cylindrical structure, the bottom of the upper fixed seat is provided with a second circular mounting groove for matching with the upper end surface of the stator housing of the starter generator, and an upper stop matching plate is provided in the second circular mounting groove; a second air cavity and a second liquid cavity which are independent of each other and both have an annular cavity structure are provided in the circumferential wall of the upper fixed seat, a plurality of second air outlet holes connected with the second air cavity are provided at the bottom of the second circular mounting groove, a second air inlet channel connected with the second air cavity is provided in the wall of the connecting cylinder, and the second air inlet channel is connected with an external compressed air source; a second liquid inlet channel and a second liquid outlet channel connected with the second liquid cavity are provided in the wall of the connecting cylinder, and the second liquid inlet channel and the second liquid outlet channel are connected with an external cooling liquid source.

[0013] The basic principle of the upper cover assembly is: when it is necessary to tighten and fix the starter generator stator housing, the cylinder piston rod moves downward, driving the connecting tube and the upper fixing seat thereon to move downward, until the second circular mounting groove matches and is tightened with the upper end face of the starter generator stator housing, the cylinder piston rod stops, the second air inlet channel is ventilated, the external compressed gas source enters the second air cavity through the second air inlet channel, the compressed gas in the second air cavity is ejected through the second air outlet, and the gas ejection direction of the second air outlet is toward the upper end face and the upper stop of the starter generator stator housing, blowing away the powder on the upper end face and the upper stop of the starter generator stator housing. The second liquid inlet channel is ventilated, the external coolant enters the second liquid cavity through the second liquid inlet channel, and flows out through the second liquid outlet channel, the coolant circulates back and forth in the second liquid inlet channel, the second liquid cavity and the second liquid outlet channel, to achieve cooling of the connecting tube and the upper fixing seat, and to prevent the entire upper cover assembly from overheating.

[0014] Furthermore, the middle part of the connecting tube is hollowed out to reduce the weight of the connecting tube and ensure that the cylinder piston rod can smoothly drive the connecting tube to reciprocate vertically.

[0015] Further, as a specific arrangement of the spindle assembly, the spindle assembly includes a central shaft arranged vertically and located inside the connecting tube, the top of the central shaft is fixedly connected to the piston rod of the cylinder, and a flange connected to the upper end surface of the upper guide plate is arranged at the middle and upper part of the central shaft;

[0016] A lower fixing seat is arranged at the bottom of the central shaft, and a middle fixing seat is arranged at the middle and lower part of the central shaft. The cylinder piston rod drives the central shaft so that the lower fixing seat and the middle fixing seat are located inside and on the top of the pole shoe respectively.

[0017] The lower fixed seat is provided with a third liquid cavity and a third air cavity both of which are annular cavity structures, and the third liquid cavity is located inside the third air cavity; the interior of the central axis is provided with a third liquid inlet channel, a third liquid outlet channel and a third air inlet channel; one end of the third liquid inlet channel and the third liquid outlet channel are both connected to the third liquid cavity, and the other end is connected to an external cooling liquid source; one end of the third air inlet channel is connected to the third air cavity, and the other end is connected to an external compressed air source, and a plurality of third air outlet holes are provided on the side wall of the third air cavity;

[0018] A fourth air cavity in an annular structure is arranged inside the middle fixed seat, and a plurality of air outlet pipes connected with the fourth air cavity are arranged on the lower end surface of the middle fixed seat, and the bottom of each of the air outlet pipes is located in the gap between the stator housing and the pole shoe of the starter generator, and a fourth air inlet channel connected with the fourth air cavity is arranged on the top of the middle fixed seat, and the fourth air inlet channel is used to be connected to an external compressed air source.

[0019] The basic principle of the mandrel assembly is as follows: after the cylinder piston rod drives the upper cover assembly to press and fix the upper end surface of the starter generator stator housing, the lower fixing seat and the middle fixing seat are located inside and on the top of the pole shoe, respectively. The external compressed gas source delivers high-pressure gas to the third air cavity through the third air inlet channel, and the high-pressure gas is ejected through multiple third air outlets to blow away the powder on the inner wall of the pole shoe; the external compressed gas source delivers high-pressure gas to the fourth air cavity through the fourth air inlet channel, and the high-pressure gas is ejected through multiple air outlet pipes to blow away the powder on the top of the pole shoe, meeting the technical requirements of powder coating without powder attachment to the inner wall and top of the four pole shoes. During cooling, the external coolant source delivers coolant through the third liquid inlet channel, and the coolant flows out through the third liquid outlet channel to cool the entire lower fixing seat and the center axis, avoiding overheating of the entire mandrel assembly.

[0020] Furthermore, as a specific setting method of the lower fixed seat, the lower fixed seat includes a first enclosure plate and a second enclosure plate, the first enclosure plate is fixedly connected to the outer wall of the central axis, and the space between the first enclosure plate and the central axis is the third liquid chamber; the second enclosure plate is fixedly connected to the circumferential outer wall of the first enclosure plate, and the space between the second enclosure plate and the first enclosure plate is the third air chamber, and a plurality of the third air outlet holes are arranged on the circumferential outer wall of the second enclosure plate.

[0021] Furthermore, each pole shoe is provided with a plurality of the third air outlets in the area of ​​the projection of the circumferential outer wall of the second enclosure plate in the side view direction, so as to ensure that the high-pressure gas blown by the plurality of third air outlets blows away the powder on the inner wall of each pole shoe.

[0022] Furthermore, the number of the outlet pipes is 4, and the 4 outlet pipes are evenly arranged at annular intervals in the axial direction of the central axis. In the present invention, 4 pole shoes are evenly arranged at annular intervals on the inner wall of the stator housing of the starter generator, and each outlet pipe corresponds to a pole shoe, ensuring that the high-pressure gas blown by the outlet pipe blows away the excess powder on the top of each pole shoe to avoid powder accumulation.

[0023] Furthermore, the first air inlet channel, the first liquid inlet channel, the first liquid outlet channel, the second air inlet channel, the second liquid inlet channel, the second liquid outlet channel, the third liquid inlet channel, the third liquid outlet channel and the inlet section of the third air inlet channel are all provided with internal threads. The provision of the internal threads facilitates the connection of pipelines.

[0024] Furthermore, there are two guide rods, the top ends of the two guide rods are fixedly connected to the two sides of the mounting plate, and the bottom ends of the two guide rods are fixedly connected to the bases on the two sides of the guide seat.

[0025] Furthermore, the diameters of the first air outlet, the second air outlet and the third air outlet are all 1mm to 2mm; a plurality of first air outlets are evenly arranged at the bottom of the first circular mounting groove at annular intervals; a plurality of second air outlets are evenly arranged at the bottom of the second circular mounting groove at annular intervals. By controlling the size and distribution position of the air outlets, it is ensured that the high-pressure gas forms a barrier, effectively preventing powder particles from entering the upper and lower stoppers, upper and lower end faces and the inner walls of the four pole shoes of the generator stator housing.

[0026] Compared with the existing stator housing inner wall powder coating tooling, the present invention has the following beneficial effects:

[0027] 1. The powder coating tooling for the inner wall of the stator housing of the starter generator in the present invention has multiple air cavities on the tooling, and the high-pressure gas sprayed from the air outlets forms a barrier through the air outlets connected to the air cavities, which effectively prevents powder particles from entering the non-spraying area, that is, the upper and lower stoppers, upper and lower end faces and the inner walls of the four pole shoes of the generator stator housing are free of powder adhesion, meeting the technical requirements of the powder coating process of the stator housing of the starter generator. The coating tooling not only ensures the accuracy of the coating area, but also greatly reduces the appearance defects caused by powder contamination, reduces the subsequent cleaning costs, and improves the overall coating quality.

[0028] 2. A powder coating tool for the inner wall of the stator housing of a starter generator in the present invention realizes effective heat dissipation of the tool by setting multiple liquid chambers inside the tool, and the multiple liquid chambers are connected to an external coolant source through a liquid inlet channel and a liquid outlet channel. During the stator housing heating and coating process, the coolant circulates continuously to take away the heat absorbed by the tool, effectively maintaining the stability of the tool temperature and avoiding the problem of powder adhesion caused by overheating of the tool. This not only ensures the uniformity and adhesion of the coating, but also extends the service life of the tool, and reduces the downtime maintenance and replacement costs caused by tool pollution.

[0029] 3. The powder coating tooling for the inner wall of the stator housing of the starter generator in the present invention innovatively integrates an air blowing system and a coolant circulation system, effectively solving the two major problems of powder penetration and tooling overheating, and significantly improving the yield and efficiency of the coating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of a powder coating tool for the inner wall of the stator casing of a starter generator.

[0031] Figure 2 Schematic diagram of the three-dimensional structure of the lower cover assembly.

[0032] Figure 3 It is a schematic diagram of the top view of the lower cover assembly.

[0033] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0034] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure in the BB direction.

[0035] Figure 6 Schematic diagram of the three-dimensional structure of the upper cover assembly Figure 1 .

[0036] Figure 7 Schematic diagram of the three-dimensional structure of the upper cover assembly Figure 2 .

[0037] Figure 8 It is a schematic diagram of the top structure of the upper cover assembly.

[0038] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure in the CC direction.

[0039] Fig.10 for Figure 8 Schematic diagram of the cross-sectional structure in the DD direction.

[0040] Fig.11 Schematic diagram of the three-dimensional structure of the mandrel assembly.

[0041] Fig.12 It is a schematic diagram of the top view of the core shaft assembly.

[0042] Fig.13 for Fig.12 Schematic diagram of the cross-sectional structure in the EE direction.

[0043] Fig.14 for Fig.12 Schematic diagram of the cross-sectional structure in the FF direction.

[0044] Fig.15 for Fig.12 Schematic diagram of the cross-sectional structure in the GG direction.

[0045] Among them, 1. base; 2. mounting plate; 3. guide rod;

[0046] 4. Lower cover assembly; 41. Guide seat; 42. First circular mounting groove; 43. Lower stopper matching plate; 45. First air cavity; 46. First liquid cavity; 47. First air outlet; 48. Air source connection seat; 49. Liquid connection seat; 410. First air inlet channel; 412. First liquid inlet channel; 413. First liquid outlet channel;

[0047] 5. Cylinder;

[0048] 6. Mandrel assembly; 61. Center axis; 62. Flange; 63. Lower fixed seat; 631. First enclosing plate; 632. Second enclosing plate; 64. Middle fixed seat; 65. Third liquid cavity; 66. Third air cavity; 67. Third liquid inlet channel; 68. Third liquid outlet channel; 69. Third air inlet channel; 610. Third air outlet hole; 612. Fourth air cavity; 613. Air outlet pipe; 614. Fourth air inlet channel;

[0049] 7. Upper cover assembly; 71. Upper guide plate; 72. Connecting tube; 73. Upper fixing seat; 74. Second circular mounting groove; 75. Upper stopper matching plate; 76. Second air cavity; 77. Second liquid cavity; 78. Second air outlet; 79. Second air inlet channel; 710. Second liquid inlet channel; 711. Second liquid outlet channel;

[0050] 8. Starter generator stator housing; 9. Pole shoe. DETAILED DESCRIPTION

[0051] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0052] like Figure 1 to Figure 5 As shown, the present invention provides a powder coating tool for the inner wall of the stator housing of a starter generator, which includes a lower cover assembly 4 and a mounting plate 2 arranged vertically at intervals, and a plurality of guide rods 3 are arranged between the lower cover assembly 4 and the mounting plate 2; specifically, the number of the guide rods 3 is two, the top ends of the two guide rods 3 are fixedly connected to the two sides of the mounting plate 2, and the bottom ends of the two guide rods 3 are fixedly connected to the bases 1 on both sides of the guide seat 41.

[0053] The mounting plate 2 is provided with a cylinder 5, the piston rod of the cylinder 5 is vertically arranged and connected with a core shaft assembly 6 and an upper cover assembly 7; specifically, the lower cover assembly 4 includes a guide seat 41, the guide seat 41 is a circular cylindrical structure, the top of the guide seat 41 is provided with a first circular mounting groove 42 for matching with the lower end surface of the starter generator stator housing 8, and a lower stop mating plate 43 is provided in the first circular mounting groove 42; the circumferential wall of the guide seat 41 is provided with a first air cavity 45 and a first liquid cavity 46 which are independent of each other and both have a circular cavity structure, and the first circular A plurality of first air outlet holes 47 connected to the first air cavity 45 are provided at the bottom of the shaped mounting groove, and an air source connecting seat 48 and a liquid connecting seat 49 are provided on the circumferential outer wall of the guide seat 41; a first air inlet channel 410 connected to the first air cavity 45 is provided in the air source connecting seat 48, and the first air inlet channel 410 is connected to an external compressed air source; a first liquid inlet channel 412 and a first liquid outlet channel 413 connected to the first liquid cavity 46 are provided on the liquid connecting seat 49, and the first liquid inlet channel and the first liquid outlet channel 413 are connected to an external cooling liquid source.

[0054] The core shaft assembly 6 is used to blow away the excess powder on the inner wall and the upper part of the pole shoe 9 and cool itself.

[0055] The cylinder 5 drives the upper cover assembly 7 to press and fix the top of the starter generator stator housing 8. The upper cover assembly 7 blows away the powder on the upper end surface and the upper stop of the starter generator stator housing 8 and cools itself.

[0056] The process of powder coating of the starter generator stator housing 8 is to ensure that there is no powder attached to the upper and lower stoppers, upper and lower end faces and the inner walls of the four pole shoes 9 of the starter generator stator housing 8, and the remaining inner walls are attached with powder. The processing conditions are to preheat the starter generator stator housing 8 to about 200°C, put it into the spraying tooling and spray the powder, and the powder melts and adheres to the inner wall after contacting the inner wall, completing the powder coating work of the inner wall of the starter generator stator housing 8.

[0057] The working principle of the powder coating tooling for the inner wall of the starter generator stator housing in the present invention is as follows: first, the external compressed air source and the external coolant source are connected to the lower cover assembly 4, the core shaft assembly 6 and the upper cover assembly 7, and then the preheated starter generator stator housing 8 is placed in the first circular installation groove 42, so that the lower stopper at the bottom of the starter generator stator housing 8 is matched with the lower stopper matching plate 43 in the first circular installation groove 42 to fix the bottom of the starter generator stator housing 8; then the cylinder 5 is started, and the piston rod of the cylinder 5 drives the core shaft assembly 6 and the upper cover assembly 7 to be respectively located on the inner wall of the pole shoe 9 and the top of the starter generator stator housing 8 to be pressed and fixed. After the coating, the lower cover assembly 4, the mandrel assembly 6 and the upper cover assembly 7 are ventilated and fluidized, and at the same time, the driving device puts the entire tooling with the starter generator stator housing 8 fixed thereon into the powder barrel, and the ventilated lower cover assembly 4 and the upper cover assembly 7 respectively blow away the powder on the upper and lower stops and upper and lower end faces of the generator stator housing, and the ventilated mandrel assembly 6 blows away the powder on the inner wall of the pole shoe 9 and the upper part, meeting the technical requirements of the powder coating process of the starter generator stator housing 8. After the coating is completed, the coating tooling leaves the powder barrel, and the piston rod of the cylinder 5 retracts, driving the mandrel assembly 6 and the upper cover assembly 7 to move up, and the starter generator stator housing 8 is taken out, and the powder coating process is completed. In the entire powder coating process, the external coolant source circulates in the lower cover assembly 4, the mandrel assembly 6 and the upper cover assembly 7, taking away the temperature of the starter generator stator housing 8 and transferring it to the tooling, avoiding the problem of powder adhesion caused by overheating of the tooling.

[0058] Specifically, Figure 1 , Figure 6 to Figure 10 As shown, as a specific arrangement of the upper cover assembly 7, the upper cover assembly 7 includes an upper guide plate 71, the middle portion of the upper guide plate 71 is fixedly connected to the spindle assembly 6, the two sides of the upper guide plate 71 are slidably matched with the guide rod 3 through sleeves, the lower end surface of the upper guide plate 71 is fixedly connected to a connecting cylinder 72, the spindle assembly 6 is located inside the connecting cylinder 72, the bottom of the connecting cylinder 72 is connected to an upper fixing seat 73, the upper fixing seat 73 is a circular cylindrical structure, and the bottom of the upper fixing seat 73 is provided with a second circular mounting groove 74 for matching with the upper end surface of the starter generator stator housing 8, and the second circular mounting groove 74 is provided with a second circular mounting groove 74. An upper stop mating plate 75 is provided; a second air cavity 76 and a second liquid cavity 77 which are independent of each other and both have an annular cavity structure are provided in the circumferential wall of the upper fixed seat 73; a plurality of second air outlet holes 78 which are connected to the second air cavity 76 are provided at the bottom of the second circular mounting groove 74; a second air inlet channel 79 which is connected to the second air cavity 76 is provided in the wall of the connecting tube 72, and the second air inlet channel 79 is connected to an external compressed air source; a second liquid inlet channel 710 and a second liquid outlet channel 711 which are connected to the second liquid cavity 77 are provided in the wall of the connecting tube 72, and the second liquid inlet channel 710 and the second liquid outlet channel 711 are connected to an external cooling liquid source.

[0059] The basic principle of the upper cover assembly 7 is: when it is necessary to press and fix the starter generator stator housing 8, the cylinder piston rod moves downward, driving the connecting tube 72 and the upper fixing seat 73 thereon to move downward, until the second circular mounting groove 74 cooperates with and presses the upper end surface of the starter generator stator housing 8, the cylinder piston rod stops, the second air inlet channel 79 is ventilated, and the external compressed air source enters the second air cavity 76 through the second air inlet channel 79, and the compressed gas in the second air cavity 76 is ejected through the second air outlet 78, and the gas ejection direction of the second air outlet 78 is toward the upper end surface and the upper stop of the starter generator stator housing 8, blowing away the powder on the upper end surface and the upper stop of the starter generator stator housing 8. Liquid flows through the second liquid inlet channel 710, and external cooling liquid enters the second liquid cavity 77 through the second liquid inlet channel 710 and flows out through the second liquid outlet channel 711. The cooling liquid circulates back and forth among the second liquid inlet channel 710, the second liquid cavity 77 and the second liquid outlet channel 711 to cool the connecting tube 72 and the upper fixing seat 73, thereby preventing the entire upper cover assembly 7 from overheating.

[0060] Preferably, but not limited to, the middle portion of the connecting tube 72 is hollowed out to reduce the weight of the connecting tube 72 and ensure that the cylinder piston rod can smoothly drive the connecting tube 72 to reciprocate vertically.

[0061] Specifically, Figure 1 , Figure 10 to Figure 15 As shown, as a specific arrangement of the core shaft assembly 6, the core shaft assembly 6 includes a central shaft 61 which is vertically arranged and located inside the connecting tube 72, the top of the central shaft 61 is fixedly connected to the piston rod of the cylinder 5, and a flange 62 connected to the upper end surface of the upper guide plate 71 is arranged in the middle and upper part of the central shaft 61.

[0062] A lower fixing seat 63 is provided at the bottom of the central shaft 61 , and a middle fixing seat 64 is provided at the middle and lower part of the central shaft 61 . The cylinder piston rod drives the central shaft 61 so that the lower fixing seat 63 and the middle fixing seat 64 are located inside and on the top of the pole shoe 9 respectively.

[0063] The lower fixed seat 63 is provided with a third liquid cavity 65 and a third air cavity 66, both of which are circular cavity structures, and the third liquid cavity 65 is located inside the third air cavity 66; the interior of the central axis 61 is provided with a third liquid inlet channel 67, a third liquid outlet channel 68 and a third air inlet channel 69; one end of the third liquid inlet channel 67 and the third liquid outlet channel 68 are connected to the third liquid cavity 65, and the other end is connected to an external cooling liquid source; one end of the third air inlet channel 69 is connected to the third air cavity 66, and the other end is connected to an external compressed air source, and a plurality of third air outlet holes 610 are provided on the side wall of the third air cavity 66.

[0064] A fourth air cavity 612 in an annular structure is arranged inside the middle fixed seat 64, and a plurality of air outlet pipes 613 connected to the fourth air cavity 612 are arranged on the lower end surface of the middle fixed seat 64, and the bottom of each of the air outlet pipes 613 is located in the gap between the stator housing 8 and the pole shoe 9 of the starter generator, and a fourth air inlet channel 614 connected to the fourth air cavity 612 is arranged on the top of the middle fixed seat 64, and the fourth air inlet channel 614 is used to connect to an external compressed air source.

[0065] The basic principle of the mandrel assembly 6 is as follows: after the cylinder piston rod drives the upper cover assembly 7 to press and fix the upper end surface of the starter generator stator housing 8, the lower fixing seat 63 and the middle fixing seat 64 are respectively located inside and on the top of the pole shoe 9, and the external compressed gas source delivers high-pressure gas to the third air cavity 66 through the third air inlet channel 69, and the high-pressure gas is ejected through multiple third air outlet holes 610 to blow away the powder on the inner wall of the pole shoe 9; the external compressed gas source delivers high-pressure gas to the fourth air cavity 612 through the fourth air inlet channel 614, and the high-pressure gas is ejected through multiple air outlet pipes 613 to blow away the powder on the top of the pole shoe 9, meeting the technical requirements of powder coating without powder attachment to the inner wall and top of the four pole shoes 9. During cooling, the external coolant source delivers coolant through the third liquid inlet channel 67, and the coolant flows out through the third liquid outlet channel 68, so as to cool the entire lower fixing seat 63 and the central shaft 61 and prevent the entire mandrel assembly 6 from overheating.

[0066] Preferably, as a specific setting method of the lower fixed seat 63, the lower fixed seat 63 includes a first enclosure plate 631 and a second enclosure plate 632, the first enclosure plate 631 is fixedly connected to the outer wall of the central axis 61, and the space between the first enclosure plate 631 and the central axis 61 forms the third liquid chamber 65; the second enclosure plate 632 is fixedly connected to the circumferential outer wall of the first enclosure plate 631, and the space between the second enclosure plate 632 and the first enclosure plate 631 is the third air chamber 66, and a plurality of the third air outlet holes 610 are arranged on the circumferential outer wall of the second enclosure plate 632.

[0067] Preferably, but not limited to, each pole shoe 9 is provided with a plurality of third air outlets 610 in the area of ​​the side projection of the circumferential outer wall of the second enclosure 632. This arrangement ensures that the high-pressure gas blown by the plurality of third air outlets 610 blows away the powder on the inner wall of each pole shoe 9.

[0068] In this embodiment, the number of the outlet pipes 613 is 4, and the 4 outlet pipes 613 are evenly arranged at annular intervals in the axial direction of the central axis 61. In the present invention, 4 pole shoes 9 are evenly arranged at annular intervals on the inner wall of the stator housing 8 of the starter generator, and each outlet pipe 613 corresponds to a pole shoe 9, ensuring that the high-pressure gas blown by the outlet pipe 613 blows away the excess powder on the top of each pole shoe 9 to avoid powder accumulation.

[0069] Specifically, the first air inlet channel 410, the first liquid inlet channel 412, the first liquid outlet channel 413, the second air inlet channel 79, the second liquid inlet channel 710, the second liquid outlet channel 711, the third liquid inlet channel 67, the third liquid outlet channel 68 and the inlet section of the third air inlet channel 69 are all provided with internal threads. The provision of the internal threads facilitates the connection of pipelines.

[0070] Furthermore, the diameters of the first air outlet 47, the second air outlet 78 and the third air outlet 610 are all 1 mm to 2 mm; a plurality of first air outlets 47 are evenly arranged at the bottom of the first circular mounting groove at annular intervals; a plurality of second air outlets 78 are evenly arranged at the bottom of the second circular mounting groove 74 at annular intervals. By controlling the size and distribution position of the air outlets, it is ensured that the high-pressure gas forms a barrier, effectively preventing powder particles from entering the upper and lower stoppers, upper and lower end surfaces and inner walls of the four pole shoes 9 of the generator stator housing.

[0071] In summary, the powder coating tooling for the inner wall of the stator housing of the starter generator in the present invention innovatively integrates the air blowing system and the coolant circulation system, effectively solving the two major problems of powder penetration and tooling overheating, significantly improving the yield and efficiency of the coating operation, reducing production costs, and improving the competitiveness of the entire starter generator manufacturing industry, which is of great significance to improving the competitiveness of the entire starter generator manufacturing industry.

Claims

1. A powder coating tool for the inner wall of the stator housing of a starter generator, characterized in that: It comprises a lower cover assembly and a mounting plate which are arranged vertically at intervals, and a plurality of guide rods are arranged between the lower cover assembly and the mounting plate; a cylinder is arranged on the mounting plate, and a piston rod of the cylinder is arranged vertically and a core shaft assembly and an upper cover assembly are connected thereto; The lower cover assembly includes a guide seat, which is a circular cylindrical structure. The top of the guide seat is provided with a first circular mounting groove for matching with the lower end surface of the starter generator stator housing, and a lower stop matching plate is provided in the first circular mounting groove; two bases are symmetrically provided on the circumferential outer wall of the guide seat; a first air cavity and a first liquid cavity which are independent of each other and both have a circular cavity structure are provided in the circumferential wall of the guide seat, and a plurality of first air outlet holes connected with the first air cavity are provided at the bottom of the first circular mounting groove, and an air source connecting seat and a liquid connecting seat are provided on the circumferential outer wall of the guide seat; a first air inlet channel connected with the first air cavity is provided in the air source connecting seat, and the first air inlet channel is connected with an external compressed air source; a first liquid inlet channel and a first liquid outlet channel connected with the first liquid cavity are provided on the liquid connecting seat, and the first liquid inlet channel and the first liquid outlet channel are connected with an external cooling liquid source; The mandrel assembly is used to blow away excess powder on the inner wall and upper part of the pole shoe and cool itself; The cylinder drives the upper cover assembly to press and fix the top of the starter generator stator shell, and the upper cover assembly blows away the powder on the upper end surface and the upper stop of the starter generator stator shell and cools itself.

2. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 1 is characterized in that: The upper cover assembly includes an upper guide plate, the middle part of the upper guide plate is fixedly connected to the core shaft assembly, the two sides of the upper guide plate are slidably matched with the guide rod through a sleeve, the lower end surface of the upper guide plate is fixedly connected with a connecting cylinder, the core shaft assembly is located inside the connecting cylinder, the bottom of the connecting cylinder is connected with an upper fixed seat, the upper fixed seat is a circular cylindrical structure, the bottom of the upper fixed seat is provided with a second circular mounting groove for matching with the upper end surface of the stator housing of the starter generator, and an upper stop matching plate is provided in the second circular mounting groove; a second air cavity and a second liquid cavity which are independent of each other and both have an annular cavity structure are provided in the circumferential wall of the upper fixed seat, a plurality of second air outlet holes connected with the second air cavity are provided at the bottom of the second circular mounting groove, a second air inlet channel connected with the second air cavity is provided in the wall of the connecting cylinder, and the second air inlet channel is connected with an external compressed air source; a second liquid inlet channel and a second liquid outlet channel connected with the second liquid cavity are provided in the wall of the connecting cylinder, and the second liquid inlet channel and the second liquid outlet channel are connected with an external cooling liquid source.

3. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 2, characterized in that: The middle part of the connecting tube is hollowed out.

4. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 2, characterized in that: The spindle assembly includes a central shaft which is vertically arranged and located inside the connecting tube, the top of the central shaft is fixedly connected to the piston rod of the cylinder, and the middle and upper part of the central shaft is provided with a flange connected to the upper end surface of the upper guide plate; A lower fixing seat is arranged at the bottom of the central shaft, and a middle fixing seat is arranged at the middle and lower part of the central shaft. The cylinder piston rod drives the central shaft so that the lower fixing seat and the middle fixing seat are located inside and on the top of the pole shoe respectively. The lower fixed seat is provided with a third liquid cavity and a third air cavity both of which are annular cavity structures, and the third liquid cavity is located inside the third air cavity; the interior of the central axis is provided with a third liquid inlet channel, a third liquid outlet channel and a third air inlet channel; one end of the third liquid inlet channel and the third liquid outlet channel are both connected to the third liquid cavity, and the other end is connected to an external cooling liquid source; one end of the third air inlet channel is connected to the third air cavity, and the other end is connected to an external compressed air source, and a plurality of third air outlet holes are provided on the side wall of the third air cavity; A fourth air cavity in an annular structure is arranged inside the middle fixed seat, and a plurality of air outlet pipes connected with the fourth air cavity are arranged on the lower end surface of the middle fixed seat, and the bottom of each of the air outlet pipes is located in the gap between the stator housing and the pole shoe of the starter generator, and a fourth air inlet channel connected with the fourth air cavity is arranged on the top of the middle fixed seat, and the fourth air inlet channel is used to be connected to an external compressed air source.

5. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 4, characterized in that: The lower fixed seat includes a first enclosure plate and a second enclosure plate, the first enclosure plate is fixedly connected to the outer wall of the central axis, and the space between the first enclosure plate and the central axis is the third liquid chamber; the second enclosure plate is fixedly connected to the circumferential outer wall of the first enclosure plate, and the space between the second enclosure plate and the first enclosure plate is the third air chamber, and a plurality of third air outlet holes are arranged on the circumferential outer wall of the second enclosure plate.

6. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 5, characterized in that: Each of the pole shoes is provided with a plurality of the third air outlet holes in the area projected in the side view direction of the circumferential outer wall of the second enclosure plate.

7. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 4, characterized in that: The number of the air outlet pipes is 4, and the 4 air outlet pipes are evenly arranged in a circular pattern in the axial direction of the central axis.

8. The powder coating tool for the inner wall of the stator housing of the starter generator according to any one of claims 4 to 7, characterized in that: The inner walls of the first air inlet channel, the first liquid inlet channel, the first liquid outlet channel, the second air inlet channel, the second liquid inlet channel, the second liquid outlet channel, the third liquid inlet channel, the third liquid outlet channel and the inlet section of the third air inlet channel are all provided with internal threads.

9. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 8, characterized in that: There are two guide rods, the top ends of the two guide rods are fixedly connected to the two sides of the mounting plate, and the bottom ends of the two guide rods are fixedly connected to the two bases on both sides of the guide seat.

10. The powder coating tool for the inner wall of the stator housing of the starter generator according to claim 4, characterized in that: The diameters of the first air outlet, the second air outlet and the third air outlet are all 1mm to 2mm; a plurality of first air outlet holes are evenly arranged at the bottom of the first circular mounting groove at annular intervals; a plurality of second air outlet holes are evenly arranged at the bottom of the second circular mounting groove at annular intervals.

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