An automatic oil injection apparatus and an oil injection method

Abstract

The application discloses an automatic oil spraying equipment, and belongs to the field of oil spraying equipment, and solves the problems of low oil spraying efficiency and difficult guarantee of oil spraying consistency of an existing manual oil spraying on a filter shell. The automatic oil spraying equipment comprises a rack and a control module, the rack is rotationally provided with a positioning disc for positioning the filter shell, and the rack is provided with an oil spraying mechanism capable of spraying oil into the filter shell; the rack is provided with a driving mechanism for driving the positioning disc to rotate so as to convey the filter shell to the oil spraying mechanism; the rack corresponding to the oil spraying mechanism is provided with a second sensor for detecting whether the filter shell is rotated to a position; and the rack between the first sensor and the second sensor is provided with a pushing mechanism for pushing the filter shell out of the positioning groove. The automatic oil spraying equipment can effectively improve work efficiency and reduce labor intensity. The application further discloses an automatic oil spraying equipment method. The automatic oil spraying method can make the oil spraying on the filter shell more uniform and consistent, and effectively guarantee product quality.

Description

Technical Field

[0001] This invention relates to the field of oil spraying equipment, and more specifically, to an automatic oil spraying device and oil spraying method. Background Technology

[0002] The filter housing is a key component of the filter. During the manufacturing process, the filter housing typically requires oil spraying inside to prevent rust. Traditionally, this oil spraying involves manually placing the housing part into the spray gun nozzle, where the spray gun atomizes the oil and applies it to the inner cavity of the housing.

[0003] The above-mentioned oil spraying method has the following defects: (1) The labor intensity of workers is high, the production efficiency is low, and long-term manual operation is prone to oil leakage; (2) Since it is a manual operation, the oil spraying time depends entirely on the length of time the shell is placed manually, and the consistency and uniformity of the oil spraying volume cannot be guaranteed; (3) For shells with higher dimensions, the atomized oil mist cannot be sprayed to the top of the shell.

[0004] Therefore, there is an urgent need for an efficient, safe, stable, and highly automated automatic oil spraying device and method for rust prevention treatment of the inner cavity of the filter housing. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide an automatic oil spraying device that can effectively improve work efficiency and reduce labor intensity.

[0006] The second objective of this invention is to provide an automatic oil spraying method that makes the oil spraying on the filter housing more uniform and consistent, effectively ensuring product quality.

[0007] To achieve the aforementioned objective, the present invention provides an automatic oil spraying device, comprising a frame and a control module. A positioning disc for positioning a filter housing is rotatably mounted on the frame. An oil spraying mechanism capable of extending into the filter housing for oil spraying is also mounted on the frame. A drive mechanism on the frame rotates the positioning disc to transport the filter housing to the oil spraying mechanism. Multiple positioning grooves, adapted to the outer wall of the filter housing, are evenly distributed along the outer edge of the positioning disc. A first sensor for detecting when the filter housing is properly installed is mounted on one side of one of the positioning grooves on the frame. A second sensor for detecting when the filter housing is rotated into position is mounted on the frame corresponding to the oil spraying mechanism. A pushing mechanism for pushing the filter housing out of the positioning groove is mounted on the frame between the first and second sensors. The oil spraying mechanism, drive mechanism, first sensor, second sensor, and pushing mechanism are all electrically connected to the control module.

[0008] Furthermore, the positioning disk includes a rotary table and a positioning table. The rotary table is rotatably mounted on the frame, the output end of the drive mechanism is connected to the center of the rotary table, the positioning table is detachably mounted on the rotary table, and the positioning grooves are evenly distributed on the outer edge of the positioning table.

[0009] Furthermore, the positioning platform has a hollow structure, and a mounting base extending through the positioning platform is provided above the frame. The first sensor, the second sensor, and the pushing mechanism are all mounted on the mounting base, and the middle part of the positioning groove is connected to the interior of the positioning platform.

[0010] Furthermore, the positioning platform is composed of multiple split positioning seats; each positioning seat has a locking groove at its bottom that can be engaged with the outer edge of the rotating platform.

[0011] Furthermore, the feeding mechanism includes a linear drive and a push plate. The linear drive is mounted on a mounting base, and the push plate is mounted on the output end of the linear drive. The push plate has a push groove that matches the outer wall of the filter housing. The linear drive is electrically connected to the control module.

[0012] Furthermore, the inner wall of each positioning groove is provided with fasteners for securing the filter housing.

[0013] Furthermore, a groove is provided on the top surface of the frame corresponding to the oil injection mechanism. Two arc-shaped support ribs are provided in the groove, extending to the top surface of the frame. The two support ribs are arranged at intervals, and the distance between the two support ribs is less than the diameter of the filter housing.

[0014] Furthermore, the spraying mechanism includes a spray gun, and the frame is equipped with a lifting mechanism. The spray gun is installed on the output end of the lifting mechanism, and the initial position of the top of the spray gun is flush with the top surface of the frame. A through hole is provided on the frame directly above the spray gun to accommodate the spray gun sliding up and down. The axis of the through hole is located on the rotation arc of the positioning groove. A third sensor to prevent the spray gun from hitting the gun during upward movement and a fourth sensor for detecting the spray gun's reset are provided on the frame on one side of the lifting mechanism. The spray gun, the lifting mechanism, the third sensor, and the fourth sensor are all electrically connected to the control module.

[0015] To achieve the second objective mentioned above, the present invention provides an automatic fuel injection method, which includes the following steps:

[0016] S1: At the feeding station corresponding to the first sensor, place the filter housing tightly against the top surface of the frame, push it along the top surface of the frame and secure it in the positioning groove;

[0017] S2: The first sensor detects the filter housing. The control module first controls the pushing mechanism to push the material once, then controls the oil injection mechanism to lift and lower once, and finally controls the drive mechanism to rotate the positioning plate so that the next positioning slot rotates to the feeding station.

[0018] S3: Repeat steps S1 and S2 until the filter housing rotates to the corresponding injection position of the injection mechanism;

[0019] S4: The second sensor detects the filter housing, and the control module controls the oil injection mechanism to spray oil into the inner cavity of the filter housing, thus completing the oil injection operation into the inner cavity of the filter housing.

[0020] S5: Repeat steps S3 and S4 to form an automatic oil injection cycle.

[0021] As a further improvement, in step S2, the maximum height to which the fuel injection mechanism rises each time is determined by the following formula:

[0022] h = H - h1,

[0023] Wherein, H is the height of the filter housing, and h1 is 30mm to 50mm;

[0024] In step S4, when the second sensor detects the filter housing, the control module controls the injection mechanism to start injecting oil into the inner cavity of the filter housing after the injection mechanism rises to height h2; the control module then controls the injection mechanism to stop injecting oil after the injection mechanism rises to height h, or controls the injection mechanism to stop injecting oil after the injection mechanism descends to h2, wherein h2 is 30mm to 50mm. 。

[0025] Beneficial effects

[0026] Compared with the prior art, the advantages of this invention are as follows:

[0027] The automatic oil spraying equipment of the present invention has a high degree of automation, which can effectively avoid poor oil spraying effect and defective products such as those that have not been sprayed due to human error. At the same time, it can spray oil for shells with different diameters and heights, and the amount of oil adhering to the inner cavity of the shell is uniform. The oil spraying position can be accurately controlled, making the oil spraying on the filter shell more uniform and consistent, effectively ensuring product quality, effectively improving work efficiency, and reducing labor intensity. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention;

[0029] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0030] Figure 3 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0031] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0032] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point C;

[0033] Figure 6 This is a top-view three-dimensional structural diagram of the present invention;

[0034] Figure 7 This is an enlarged three-dimensional structural diagram of the positioning stage in this invention;

[0035] Figure 8 This is an enlarged three-dimensional structural diagram of the connecting column in this invention.

[0036] The components are: 1-frame, 2-control module, 3-positioning plate, 4-oil spraying mechanism, 5-drive mechanism, 6-positioning groove, 7-first sensor, 8-second sensor, 9-push mechanism, 10-fastener, 11-sinking trough, 12-support rib, 13-mounting base, 31-rotating table, 32-positioning table, 41-spray gun, 42-lifting mechanism, 43-through hole, 44-third sensor, 45-fourth sensor, 91-linear drive component, 92-push plate, 93-push groove, 321-positioning seat, 322-slotted groove, 3211-upper positioning plate, 3212-lower positioning plate, 3213-connecting column, 3214-positioning column. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0038] See Figure 1-8An automatic oil spraying device includes a frame 1 and a control module 2. The control module 2 is installed on one side of the frame 1. The top surface of the frame 1 is a closed plane to support and position the filter housing. The lower part is a hollow structure to facilitate the arrangement of the oil spraying mechanism 4, the drive mechanism 5, etc. A positioning disk 3 for positioning the filter housing is rotatably mounted on the frame 1. An oil spraying mechanism 4 that can extend into the filter housing for oil spraying is mounted on the frame 1. A drive mechanism 5 that drives the positioning disk 3 to rotate to transport the filter housing to the oil spraying mechanism 4 is mounted on the frame 1. Preferably, the drive mechanism 5 is a motor, and the output end of the motor passes through the top surface of the frame 1 and is connected to the positioning disk 3. In other embodiments, the drive mechanism 5 can also be a motor driven by a gear transmission mechanism, a belt transmission mechanism, or a sprocket transmission mechanism. Multiple positioning grooves 6, which are adapted to the outer wall of the filter housing, are evenly distributed on the outer edge of the positioning plate 3. A first sensor 7 for detecting that the filter housing is installed in place is provided on the frame 1 on one side of one of the positioning grooves 6. A second sensor 8 for detecting that the filter housing is rotated into place is provided on the frame 1 corresponding to the oil injection mechanism 4. Both the first sensor 7 and the second sensor 8 are proximity sensors. A pushing mechanism 9 for pushing the filter housing out of the positioning groove 6 is provided on the frame 1 between the first sensor 7 and the second sensor 8. The oil injection mechanism 4, the drive mechanism 5, the first sensor 7, the second sensor 8, and the pushing mechanism 9 are all electrically connected to the control module 2 to realize automatic control of oil injection.

[0039] like Figure 1 As shown, in this embodiment of the oil spraying equipment, the positioning disk 3 is a turntable with 4 positioning slots 6, and each positioning slot 6 is distributed in a pair of positioning slots 6. The driving mechanism 5 drives the positioning disk 3 to rotate 90° to one station, that is, the positioning disk 3 rotates 90° to rotate the next positioning slot 6 (1 pair of positioning slots) to the feeding station.

[0040] In this embodiment, the positioning disk 3 includes a rotating platform 31 and a positioning platform 32. The rotating platform 31 is rotatably mounted on the frame 1, and the output end of the drive mechanism 5 is connected to the center of the rotating platform 31. The positioning platform 32 is detachably mounted on the rotating platform 31. Specifically, the positioning platform 32 is connected to the rotating platform 31 by screws, and positioning grooves 6 are evenly distributed on the outer edge of the positioning platform 32. In actual use, positioning grooves 6 of different diameters can be replaced by replacing the positioning platform 32, thereby enabling the positioning of filter housings of different diameters, making it more convenient to use and applicable to a wider range of applications.

[0041] In this embodiment, the positioning platform 32 has a hollow structure. A mounting base 13 is provided above the frame 1, extending into the positioning platform 32. Specifically, a gantry frame is provided on the top of the frame 1, and the mounting base 13 is fixed on the gantry frame. The first sensor 7, the second sensor 8, and the pushing mechanism 9 are all installed on the mounting base 13, which facilitates the installation and arrangement of the first sensor 7, the second sensor 8, and the pushing mechanism 9, making the overall equipment structure more reasonable. It is convenient for the operator to place the filter shell into the positioning groove 6 from the outside. The middle part of the positioning groove 6 is connected to the inside of the positioning platform 32, ensuring that the first sensor 7 and the second sensor 8 can detect the filter shell, and at the same time, the pushing mechanism 9 can contact the filter shell and push it out.

[0042] In this embodiment, the positioning platform 32 is composed of multiple separate positioning seats 321 assembled together; each positioning seat 321 has a locking groove 322 at its bottom that can be engaged with the outer edge of the rotating platform 31. When replacing the positioning platform 32, loosen the screws between the positioning platform 32 and the rotating platform 31, remove the multiple positioning seats 321 one by one, then replace the positioning seat 321 with a positioning groove 6 of a different diameter, and engage the locking groove 322 with the outer edge of the rotating platform 31 to achieve quick positioning of the positioning seat 321. Finally, tighten the screws. Its separate design of the positioning platform 32 structure makes it easy to disassemble the positioning platform 32. Preferably, each positioning base 321 consists of an upper positioning plate 3211 and a lower positioning plate 3212, with the upper positioning plate 3211 and lower positioning plate 3212 spaced apart. The upper positioning plate 3211 and lower positioning plate 3212 are connected by multiple connecting posts 3213. The bottom surface of the connecting post 3213 is flat and fits against the top surface of the lower positioning plate 3212. The lower positioning plate 3212 and the connecting post 3213 are connected by screws. A positioning post 3214 is provided at the top of the connecting post 3213. Correspondingly, the upper positioning... The bottom surface of plate 3211 is provided with an insertion groove that matches the positioning post 3214. The positioning post 3214 is inserted into the insertion groove to achieve rapid positioning of the upper positioning plate 3211. The positioning post 3214 and the upper positioning plate 3211 are connected by screws. The first sensor 7, the second sensor 8, and the pushing mechanism 9 are all located between the upper positioning plate 3211 and the lower positioning plate 3212. Its positioning seat 321 is a detachable assembly structure, which meets the detection requirements of the first sensor 7 and the second sensor 8 and the action requirements of the pushing mechanism 9, while facilitating disassembly and maintenance.

[0043] In this embodiment, the pushing mechanism 9 includes a linear drive 91 and a push plate 92. The linear drive 91 can be a cylinder or a linear guide rail, and it is mounted on the mounting base 13. The push plate 92 is mounted on the output end of the linear drive 91, and it has a push groove 93 that fits the outer wall of the filter housing. The linear drive 91 is electrically connected to the control module 2. By using the push groove 93 to contact the filter housing, the filter housing can be smoothly pushed out of the positioning groove 6 and enter the next process.

[0044] In this embodiment, each positioning groove 6 has a fastener 10 on its inner wall for securing the filter housing, preventing the filter housing from detaching from the positioning groove 6 during rotation. Preferably, the fastener 10 can be a magnet embedded in the positioning groove 6, using the magnet to attract and fix the filter housing in the positioning groove 6, preventing loosening while facilitating the pushing mechanism 9 to push it out. In other embodiments, the fastener 10 can be a rubber suction cup or an electromagnet; obviously, magnetic attraction is faster and more convenient.

[0045] Preferably, a groove 11 is provided on the top surface of the frame 1 corresponding to the oil injection mechanism 4. Two arc-shaped support ribs 12 extending to the top surface of the frame 1 are provided within this groove 11. The two support ribs 12 are spaced apart, and the distance between them is less than the diameter of the filter housing. At the oil injection station, when the oil injection mechanism 4 injects oil, the oil mist will fall onto the top surface of the frame 1 corresponding to that station, forming oil residue. Therefore, the two support ribs 12 are used to contact and support the filter housing, reducing the contact area between the bottom surface of the filter housing and the top surface of the frame 1, thereby reducing the amount of oil adhering to the bottom surface of the filter housing and ensuring the subsequent sealing performance of the filter housing.

[0046] In this embodiment, the oil spraying mechanism 4 includes a spray gun 41 with an upward-sloping nozzle. A lifting mechanism 42 is provided on the frame 1. The lifting mechanism 42 can be a linear guide or a gear and rack transmission mechanism. The spray gun 41 is mounted on the output end of the lifting mechanism 42, and the initial position of the top of the spray gun 41 is flush with the top surface of the frame 1 to prevent interference between the spray gun 41 and the filter housing, and to facilitate the setting of the lifting height of the spray gun 41. A through hole is provided on the frame 1 directly above the spray gun 41 to accommodate the vertical sliding of the spray gun 41. 43. To facilitate the spray gun 41 extending above the frame 1 and entering the filter housing, the axis of the through hole 43 is located on the rotation arc of the positioning groove 6, ensuring that the spray gun 41 can extend into the filter housing. A third sensor 44 is provided on the frame 1 on one side of the lifting mechanism 42 to prevent the spray gun 41 from colliding with the filter housing during upward movement, and a fourth sensor 45 is provided to detect the spray gun 41 resetting. The spray gun 41, lifting mechanism 42, third sensor 44, and fourth sensor 45 are all electrically connected to the control module 2 to control the reciprocating motion of the spray gun 41. Preferably, a sixth sensor is provided below the fourth sensor 45 for calibrating the origin of the spray gun 41. A fifth sensor is also provided on the frame 1 below the sixth sensor. The third sensor 44, fourth sensor 45, fifth sensor, and sixth sensor are all position sensors. When the fifth sensor detects the spray gun, the control module 2 controls the lifting mechanism 42 to stop operating, preventing the spray gun from colliding with the filter housing during downward movement.

[0047] Preferably, an extraction assembly (not shown in the figure) is also provided at the top of the frame 1. The oil sludge generated during the oil spraying process can be extracted by the extraction assembly to prevent oil mist from remaining on the frame 1 and the positioning plate 3, thus preventing equipment contamination and improving the hygiene of the working environment. Specifically, the extraction assembly includes an exhaust fan, an S-shaped bend, and an oil-gas separator. The input end of the exhaust fan is connected to the upper part of the frame 1, the output end of the exhaust fan is connected to one end of the S-shaped bend, and the other end of the S-shaped bend is connected to the oil-gas separator. During operation, the exhaust fan extracts the oil mist, which flows through the S-shaped bend and is finally separated by the oil-gas separator before being discharged, achieving the effect of energy saving and environmentally friendly emissions. The S-shaped bend can also condense the oil mist, thus recovering some of the oil mist and realizing two-stage oil-gas separation.

[0048] The automatic oil spraying equipment of the present invention has a high degree of automation, which can effectively avoid poor oil spraying effect and defective products such as those that have not been sprayed due to human error. At the same time, it can spray oil for shells with different diameters and heights, and the amount of oil adhering to the inner cavity of the shell is uniform. The oil spraying position can be accurately controlled, making the oil spraying on the filter shell more uniform and consistent, effectively ensuring product quality, effectively improving work efficiency, and reducing labor intensity.

[0049] An automatic oil injection method includes the following steps:

[0050] S1: At the feeding station corresponding to the first sensor 7, place the filter housing tightly against the top surface of the frame 1, push it along the top surface of the frame 1 and fasten it in the positioning groove 6; use the top surface of the frame 1 to support the filter housing, so that the initial height of the bottom surface of each filter housing relative to the spray gun 41 is the same, thereby making the position of the spray gun 41 starting to spray oil consistent.

[0051] S2: The first sensor 7 detects the filter housing. The control module 2 first controls the pushing mechanism 9 to push the material once, that is, the linear drive 91 drives the push plate 92 to push out and return to the initial position. Then, the control module 2 controls the oil spraying mechanism 4 to perform a lifting motion once, that is, the lifting mechanism 42 drives the spray gun 41 to move upward and return. Finally, the control module 5 controls the drive mechanism 5 to drive the positioning plate 3 to rotate, so that the next positioning slot 6 rotates to the feeding station.

[0052] S3: Repeat steps S1 and S2 until the filter housing is rotated to the corresponding injection position of the injection mechanism 4, that is, rotate the center of the filter housing to be directly above the spray gun 41.

[0053] S4: The second sensor 8 detects the filter housing, and the control module 2 controls the oil injection mechanism 4 to work and spray oil into the inner cavity of the filter housing, thus completing the oil spraying operation into the inner cavity of the filter housing.

[0054] S5: Repeat steps S3 and S4 to form an automatic oil injection cycle.

[0055] The oil spraying method of the present invention uses an automatic oil spraying device to replace the purely manual oil spraying method, which not only greatly improves the oil spraying efficiency and reduces labor intensity, but also makes the oil spraying on the filter housing more uniform and consistent, effectively ensuring product quality.

[0056] Preferably, in step S2, the maximum height that the fuel injection mechanism 4 rises each time is determined by the following formula:

[0057] h = H - h1,

[0058] Wherein, H is the height of the filter housing, and h1 is 30mm to 50mm, that is, h1 is the distance between the top surface of the inner cavity of the filter housing and the highest height position of the spray gun 41.

[0059] In step S4, when the second sensor 8 detects the filter housing, after the oil injection mechanism 4 rises to height h2, the control module 2 controls the oil injection mechanism 4 to start spraying oil into the inner cavity of the filter housing; after the oil injection mechanism 4 rises to height h, the control module 2 controls the oil injection mechanism 4 to stop spraying oil, or after the oil injection mechanism 4 falls to h2, the control module 2 controls the oil injection mechanism 4 to stop spraying oil. Here, h2 is 30mm to 50mm, that is, h2 is the height at which the top of the spray gun 41 rises relative to the initial position, that is, the height at which the top of the spray gun 41 rises relative to the bottom surface of the filter housing. h1 and h2 can be adjusted and determined by setting the filter housing model through a program.

[0060] In this embodiment, there is still a distance h1 between the top surface of the filter housing's inner cavity and the highest point of the spray gun 41. This means the oil spray from the spray gun 41 does not reach the top of the filter housing. This is because the oil mist naturally rises, and the nozzle of the spray gun 41 is angled upwards. Therefore, the spray gun 41 does not need to rise to the top of the filter housing's inner cavity to effectively spray oil onto the top of the inner cavity using the atomization characteristics of the oil mist and the spray gun structure. This reduces oil mist waste, lowers costs, shortens the spray gun's operating time, and improves spray efficiency. The spray gun 41 can be programmed to rise a certain distance h2 before spraying oil, thus delaying the oil spraying process. This prevents oil mist from overflowing onto the bottom surface of the filter housing and affecting subsequent sealing processes, effectively ensuring the sealing performance of the filter housing. In practical applications, the spray gun 41 can spray oil during the rising phase or during both the rising and falling phases, depending on the actual needs of the filter housing.

[0061] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An automatic oil injection apparatus characterized by comprising: The utility model provides a filter shell automatic spraying device, including frame (1) and control module (2), frame (1) is equipped with the positioning disc (3) for positioning filter shell on rotation, frame (1) is equipped with the oil injection mechanism (4) that can extend into the inside oil injection of filter shell, frame (1) is equipped with the drive mechanism (5) of drive positioning disc (3) rotation to convey filter shell to the oil injection mechanism (4) place, positioning disc (3) outer edge is evenly provided with a plurality of positioning groove (6) with filter shell outer wall adaptation, one of positioning groove (6) side frame (1) is equipped with first sensor (7) for detecting filter shell installation in place, the oil injection mechanism (4) corresponding frame (1) is equipped with second sensor (8) for detecting filter shell rotation in place, frame (1) between first sensor (7), second sensor (8) is equipped with pusher mechanism (9) for pushing filter shell and separating positioning groove (6), the oil injection mechanism (4), drive mechanism (5), first sensor (7), second sensor (8), pusher mechanism (9) are electrically connected with control module (2), positioning disc (3) includes rotating table (31) and positioning table (32), rotating table (32) rotation is installed on frame (1), the output of drive mechanism (5) is connected with the center of rotating table (31), positioning table (32) is detachably installed on rotating table (31), positioning groove (6) is evenly provided in the outer edge of positioning table (32), positioning table (32) is hollow structure, frame (1) top is equipped with the mount (13) that is penetrated to positioning table (32) inside, first sensor (7), second sensor (8), pusher mechanism (9) are all installed on mount (13), and the middle part of positioning groove (6) is communicated with the inside of positioning table (32), positioning table (32) is by a plurality of split type positioning seat (321) splicing and is formed, the bottom of each positioning seat (321) is equipped with the clamping groove (322) that can be clamped in the outer edge of rotating table (31), the corresponding frame (1) top of oil injection mechanism (4) is equipped with the sunken groove (11), the sunken groove (11) is equipped with two support ribbings (12) that are extended to frame (1) top and are arc shape, two support ribbings (12) are arranged at intervals, and the distance between two support ribbings (12) is less than the diameter of filter shell, the oil injection mechanism (4) includes spray gun (41), frame (1) is equipped with lifting mechanism (42), spray gun (41) is installed on the output of lifting mechanism (42), and the initial position of spray gun (41) top end is flush with frame (1) top, the frame (1) on the directly above of spray gun (41) is equipped with the through hole (43) that can accommodate the up-down sliding of spray gun (41), the axis of through hole (43) is located on the rotation arc of positioning groove (6).The third sensor (44) and the fourth sensor (45) are arranged on the frame (1) on one side of the lifting mechanism (42) to avoid the upward collision of the spray gun (41) and to detect the reset of the spray gun (41), and the spray gun (41), the lifting mechanism (42), the third sensor (44) and the fourth sensor (45) are electrically connected with the control module (2).

2. An automatic oil injection apparatus according to claim 1, wherein The pushing mechanism (9) comprises a linear driving member (91) and a pushing plate (92), the linear driving member (91) is installed on the mounting seat (13), the pushing plate (92) is installed on the output end of the linear driving member (91), and the pushing plate (92) is provided with a pushing groove (93) matched with the outer wall of the filter shell, and the linear driving member (91) is electrically connected with the control module (2).

3. The automatic oil injection apparatus according to claim 1, wherein The inner wall of each positioning groove (6) is provided with a fastener (10) for fastening the filter shell.

4. An oil injection method using the automatic oil injection apparatus according to claim 1, characterized by, The method comprises the following steps: S1: placing the filter shell closely on the top surface of the rack (1) at the corresponding feeding station of the first sensor (7), and pushing and fastening the filter shell in the positioning groove (6) along the top surface of the rack (1); S2: the first sensor (7) detects the filter shell, the control module (2) controls the pushing mechanism (9) to work for one time of pushing, then controls the oil injection mechanism (4) to work for one time of lifting movement, and finally controls the driving mechanism (5) to work to drive the positioning disc (3) to rotate, so that the next positioning groove (6) is rotated to the feeding station; S3: repeating steps S1 and S2 until the filter shell is rotated to the oil injection station corresponding to the oil injection mechanism (4); S4: the second sensor (8) detects the filter shell, the control module (2) controls the oil injection mechanism (4) to work to inject oil into the inner cavity of the filter shell, and the oil injection operation to the inner cavity of the filter shell is completed; S5: repeating steps S3 and S4 to form a circulating operation of automatic oil injection; In step S2, the highest height of the oil injection mechanism (4) lifted each time is determined by the following formula: h = H - h1, Wherein, H is the height of the filter shell, and h1 is 30mm-50mm; In step S4, when the second sensor (8) detects the filter shell, the control module (2) controls the oil injection mechanism (4) to start injecting oil into the inner cavity of the filter shell after the oil injection mechanism (4) is lifted to a height h2, and the control module (2) controls the oil injection mechanism (4) to stop injecting oil after the oil injection mechanism (4) is lifted to a height h, or the control module (2) controls the oil injection mechanism (4) to stop injecting oil after the oil injection mechanism (4) is lowered to h2, wherein h2 is 30mm-50mm.

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