Electromechanical electrical automatic control maintenance device

Abstract

The application discloses a kind of electromechanical electrical automatic control maintenance device, belong to lubricating oil filling equipment technical field, including rack, rack bottom is fixedly connected with universal wheel along the circumferential direction equidistantly;The one end of rack transverse part is fixedly connected with battery mounting box, battery is installed in battery mounting box, the top of rack is fixedly connected with controller, and the lateral wall of rack is fixedly connected with loudspeaker;The other end of rack transverse part top is connected with weight measurement assembly, and oil drum is supported with the top of weight measurement assembly, straight pipe is fixedly connected in the straight hole of oil drum top, and weight measurement assembly is used to monitor the weight of oil in oil drum;Rack is connected with horizontal limiting component;Straight pipe is sealedly connected with air pressure balance component;Air pressure balance component top is connected with quantitative oil injection component, and quantitative oil injection component is installed in air pressure balance component top.By the above manner, the application has quantitative filling function.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil filling equipment technology, and more specifically to an electromechanical automatic control and maintenance device. Background Technology

[0002] Lubrication is a crucial aspect of equipment maintenance. Insufficient lubrication or deteriorated grease can lead to equipment malfunctions and even impair its precision and functionality. Therefore, ensuring proper lubrication plays a vital role in reducing malfunctions, minimizing wear, extending equipment lifespan, and ensuring normal production. Consequently, lubricating oil needs to be added to mechanical and electrical equipment after a period of use, typically using a lubrication filling device.

[0003] For example, Chinese Patent Publication No. CN212107809U discloses a "Lubricating Oil Filling Device". This filling device requires the oil in the oil drum to be pumped into the mixing tank. It cannot be used directly with the oil drum, which increases the complexity of operation. At the same time, it does not have a quantitative filling function and cannot perform quantitative filling. In addition, the air pressure in the mixing tank is in a negative pressure state during filling, which makes it difficult to discharge when the oil is low.

[0004] Based on this, the present invention designs an electromechanical automatic control and maintenance device to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an electromechanical automatic control and maintenance device.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An electromechanical automatic control and maintenance device includes a frame, casters, an oil tank and a straight pipe, wherein casters are fixedly connected at equal intervals along the circumferential direction at the bottom of the frame;

[0008] A battery mounting box is fixedly connected to one end of the horizontal part of the frame, and a battery is installed in the battery mounting box. A controller is fixedly connected to the top of the frame, and a speaker is fixedly connected to the side wall of the frame.

[0009] A weight measuring component is connected to the top of the other end of the horizontal part of the frame. An oil drum is attached to the top of the weight measuring component. A straight pipe is fixedly connected to the straight hole at the top of the oil drum. The weight measuring component is used to monitor the weight of the oil in the oil drum.

[0010] The frame is connected to a horizontal limiting component, which is in close contact with the outer wall of the oil drum to achieve horizontal limiting of the oil drum;

[0011] The straight pipe is sealed with a pressure balancing assembly, which is used to balance the pressure inside the oil drum.

[0012] The pressure balancing assembly is connected to a metering oil injection assembly at its top. The metering oil injection assembly is installed on top of the pressure balancing assembly. The metering oil injection assembly includes a linear drive assembly, a barrel, a second one-way valve, an oil injection pipe, a piston, a third one-way valve, and an oil suction pipe. The linear drive assembly is installed at the top of the barrel, and the piston is driven and connected to the linear drive assembly. The outer wall of the piston is slidably connected to the outer wall of the barrel. The oil injection pipe is fixedly connected to the liquid outlet at the lower end of the side wall of the barrel. The second one-way valve is installed on the oil injection pipe. The oil suction pipe is fixedly connected to the bottom of the liquid inlet at the bottom of the barrel, and the third one-way valve is installed on the oil suction pipe.

[0013] The controller's electrical output terminal is electrically connected to the speaker, linear drive assembly, weight measuring assembly, and battery electrical input terminal.

[0014] Furthermore, the weight measuring component includes an electronic scale, a support base plate, and a mounting groove. The mounting groove is provided at the top of the horizontal part of the frame, and the electronic scale is installed in the mounting groove. The sensing end of the electronic scale is fixedly connected to the support base plate, and the top of the support base plate is in close contact with the bottom of the oil drum.

[0015] Furthermore, the horizontal limiting component includes a second limiting component and a first limiting component. The second limiting component is installed on the side wall of the upright part of the frame, and the first limiting component is installed at the outer end of the transverse part of the frame.

[0016] Furthermore, the second limiting component includes a first connecting frame and an arc-shaped limiting plate. The first connecting frame is fixedly connected to the side wall of the frame, and the arc-shaped limiting plate is fixedly connected to the end of the first connecting frame away from the frame. The side wall of the arc-shaped limiting plate away from the frame is slidably connected to the outer wall of the oil drum.

[0017] Furthermore, the first limiting component includes a limiting straight plate, a straight sliding hole, a horizontal movable plate, a straight sliding groove, and an elastic element. The side wall of the horizontal part of the frame is provided with a straight sliding groove, the top of the horizontal part of the frame is provided with a straight sliding hole, the bottom of the horizontal part of the frame is fixedly connected to an elastic element, the top of the elastic element is fixedly connected to a horizontal movable plate, and the horizontal movable plate is slidably connected to the straight sliding groove. The top of the horizontal movable plate is fixedly connected to a limiting straight plate, and the limiting straight plate is slidably connected to the straight sliding hole.

[0018] Furthermore, the air pressure balancing assembly includes an air inlet pipe, a first one-way valve, and a connecting cylinder. The connecting cylinder is threadedly connected to a straight pipe, and an air inlet pipe is fixedly connected to an air hole on the side wall of the connecting cylinder. The first one-way valve is installed on the air inlet pipe.

[0019] Furthermore, the bottom of the oil suction pipe is 2cm higher than the bottom of the oil drum.

[0020] Furthermore, when the third one-way valve is open, the air intake pipe is open and the second one-way valve is closed; when the third one-way valve is closed, the air intake pipe is closed and the second one-way valve is open.

[0021] Beneficial effects

[0022] Compared with known public technologies, the technical solution provided by this invention has the following beneficial effects:

[0023] 1. This invention places the oil drum on the weighing component and connects the air pressure balancing component to the straight pipe. The quantitative oil injection component is easy to use with the oil drum, reducing the complexity of operation. At the same time, the linear drive component of the quantitative oil injection component drives the piston to move upward, the third one-way valve opens and the second one-way valve closes, and the oil in the oil drum enters the material cylinder from the oil suction pipe. Then, the linear drive component drives the piston to move downward, the third one-way valve closes and the second one-way valve opens, and the piston discharges the quantitative oil in the material cylinder from the oil injection pipe, injecting the quantitative oil into the electromechanical equipment, thus having a quantitative injection function.

[0024] 2. When the third one-way valve of the present invention is opened, the first one-way valve of the air pressure balance component is opened, and the outside gas enters the oil tank through the air inlet pipe and the connecting cylinder, adjusting the air pressure in the oil tank to the normal pressure state, making it easier for the oil to be discharged and reducing the difficulty of discharge.

[0025] 3. The electronic scale and supporting base plate of the weight measuring component of this invention work together to monitor the weight of the oil in the oil drum in real time, making it easy to know the weight of the oil in the oil drum. At the same time, if the weight of the oil in the oil drum is lower than the set value, the controller controls the speaker to issue a voice alarm.

[0026] 4. The first and second limiting components of the horizontal limiting assembly of the present invention limit the oil drum on both sides to achieve horizontal limiting of the oil drum. At the same time, the third limiting component limits the quantitative oil injection component, and the quantitative oil injection component limits the rotation of the oil drum, completely limiting the oil drum in the horizontal direction, preventing the oil drum from shaking when moving, and ensuring the stability of the oil drum. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0028] Figure 1 The main structure of the electromechanical automatic control and maintenance device of the present invention is three-dimensional. Figure 1 ;

[0029] Figure 2This is a front view of the structure of an electromechanical automatic control and maintenance device according to the present invention;

[0030] Figure 3 This is a left view of the structure of the present invention;

[0031] Figure 4 The structural three-dimensional representation of the present invention Figure 2 ;

[0032] Figure 5 The structural three-dimensional representation of the present invention Figure 3 ;

[0033] Figure 6 For along Figure 3 A sectional view along the AA direction;

[0034] Figure 7 for Figure 6 Enlarged view of the structure at point B.

[0035] The labels in the diagram represent:

[0036] 1. Frame; 2. Casters; 3. First limiting assembly; 31. Limiting plate; 32. Straight sliding hole; 33. Horizontal movable plate; 34. Straight sliding groove; 35. Elastic element; 4. Oil tank; 5. Battery mounting box; 6. Second limiting assembly; 61. First connecting frame; 62. Arc-shaped limiting plate; 7. Air pressure balance assembly; 71. Air inlet pipe; 72. First one-way valve; 73. Connecting cylinder; 8. Speaker; 9. Handle bar; 10. Controller; 11. Third limiting assembly; 111. Second connecting frame; 112. Limiting cross plate; 12. Quantitative oil injection assembly; 121. Linear drive assembly; 122. Material cylinder; 123. Second one-way valve; 124. Oil injection pipe; 125. Piston; 126. Third one-way valve; 127. Oil suction pipe; 13. Straight pipe; 14. Weight measuring assembly; 141. Electronic scale; 142. Support base plate; 143. Mounting groove; 15. Battery. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The present invention will be further described below with reference to embodiments.

[0039] Example 1

[0040] like Figure 1 ,2 As shown in Figures 3, 4, 5, 6 and 7, an electromechanical automatic control and maintenance device includes a frame 1, casters 2, an oil drum 4 and a straight pipe 13. The casters 2 are fixedly connected at equal intervals along the circumferential direction at the bottom of the frame 1.

[0041] A battery mounting box 5 is fixedly connected to one end of the horizontal part of the frame 1. A battery 15 is installed inside the battery mounting box 5. A controller 10 is fixedly connected to the top of the frame 1. A speaker 8 is fixedly connected to the side wall of the frame 1.

[0042] A handle 9 is symmetrically and fixedly connected to the upper side wall of the frame 1 away from the oil drum 4;

[0043] A weight measuring component 14 is connected to the top of the other end of the horizontal part of the frame 1. An oil tank 4 is attached to the top of the weight measuring component 14. A straight pipe 13 is fixedly connected to the straight hole at the top of the oil tank 4. The weight measuring component 14 is used to monitor the weight of the oil in the oil tank 4.

[0044] The weight measuring component 14 includes an electronic scale 141, a support base plate 142, and a mounting groove 143. The mounting groove 143 is provided at the top of the horizontal part of the frame 1. The electronic scale 141 is installed in the mounting groove 143. The sensing end of the electronic scale 141 is fixedly connected to the support base plate 142, and the top of the support base plate 142 is in contact with the bottom of the oil drum 4.

[0045] The electronic scale 141 and the support base plate 142 of the weight measuring component 14 work together to monitor the weight of the oil in the oil drum 4 in real time, so as to make it easy to know the weight of the oil in the oil drum 4. At the same time, when the weight of the oil in the oil drum 4 is lower than the set value, the controller 10 controls the speaker 8 to perform a voice alarm.

[0046] The frame 1 is connected to a horizontal limiting component, and the water level limiting component is in close contact with the outer wall of the oil drum 4 to achieve horizontal limiting of the oil drum 4;

[0047] The horizontal limiting assembly includes a second limiting assembly 6 and a first limiting assembly 3. The second limiting assembly 6 is installed on the side wall of the upright part of the frame 1, and the first limiting assembly 3 is installed at the outer end of the transverse part of the frame 1.

[0048] The second limiting component 6 includes a first connecting frame 61 and an arc-shaped limiting plate 62. The first connecting frame 61 is fixedly connected to the side wall of the frame 1. The arc-shaped limiting plate 62 is fixedly connected to the end of the first connecting frame 61 away from the frame 1. The side wall of the arc-shaped limiting plate 62 away from the frame 1 is slidably connected to the outer wall of the oil drum 4.

[0049] The first limiting component 3 includes a limiting straight plate 31, a straight sliding hole 32, a horizontal movable plate 33, a straight sliding groove 34, and an elastic element 35. The side wall of the horizontal part of the frame 1 is provided with a straight sliding groove 34, and the top of the horizontal part of the frame 1 is provided with a straight sliding hole 32. An elastic element 35 is fixedly connected to the bottom of the horizontal part of the frame 1. The top of the elastic element 35 is fixedly connected to the horizontal movable plate 33, and the horizontal movable plate 33 is in contact with the straight sliding groove 34 and is slidably connected. The top of the horizontal movable plate 33 is fixedly connected to the limiting straight plate 31, and the limiting straight plate 31 is in contact with the straight sliding hole 32 and is slidably connected.

[0050] The first limiting component 3 and the second limiting component 6 of the horizontal limiting assembly limit both sides of the oil drum 4 to achieve horizontal limiting of the oil drum 4.

[0051] The straight pipe 13 is sealed with a pressure balancing assembly 7, which is used to balance the air pressure inside the oil drum 4.

[0052] A metering oil injection assembly 12 is connected to the top of the air pressure balance assembly 7. The metering oil injection assembly 12 is installed on the top of the air pressure balance assembly 7. The metering oil injection assembly 12 includes a linear drive assembly 121, a barrel 122, a second check valve 123, an oil injection pipe 124, a piston 125, a third check valve 126, and an oil suction pipe 127. The linear drive assembly 121 is installed on the top of the barrel 122. The linear drive assembly 121 drives and connects to the piston 125. The outer wall of the piston 125 is in close contact with the outer wall of the barrel 122. The oil injection pipe 124 is fixedly connected to the liquid outlet at the lower end of the side wall of the barrel 122. The second check valve 123 is installed on the oil injection pipe 124. The oil suction pipe 127 is fixedly connected to the bottom of the liquid inlet at the bottom of the barrel 122. The third check valve 126 is installed on the oil suction pipe 127.

[0053] The bottom of the oil suction pipe 127 is 2cm higher than the bottom of the oil drum 4;

[0054] When the third one-way valve 126 is open, the air inlet pipe 71 is open and the second one-way valve 123 is closed; when the third one-way valve 126 is closed, the air inlet pipe 71 is closed and the second one-way valve 123 is open.

[0055] The oil drum 4 is placed on the weighing assembly 14, and the air pressure balancing assembly 7 is connected to the straight pipe 13. The quantitative oil injection assembly 12 is easy to use with the oil drum 4, reducing the complexity of operation. At the same time, the linear drive assembly 121 of the quantitative oil injection assembly 12 drives the piston 125 to move upward, the third one-way valve 126 opens and the second one-way valve 123 closes, and the oil in the oil drum 4 enters the material cylinder 122 from the oil suction pipe 127. Then the linear drive assembly 121 drives the piston 125 to move downward, the third one-way valve 126 closes and the second one-way valve 123 opens, and the piston 125 discharges the quantitative oil in the material cylinder 122 from the oil injection pipe 124, injecting the quantitative oil into the electromechanical equipment, which has a quantitative injection function.

[0056] The controller 10 is electrically connected to the speaker 8, the linear drive assembly 121, the electronic scale 141, and the battery 15.

[0057] Example 2

[0058] Example 2 is a further improvement on Example 1.

[0059] like Figure 1 , 2 As shown in Figure 7, the air pressure balance assembly 7 includes an air inlet pipe 71, a first one-way valve 72 and a connecting cylinder 73. The connecting cylinder 73 is threadedly connected to the straight pipe 13. The air inlet pipe 71 is fixedly connected to the air hole on the side wall of the connecting cylinder 73. The first one-way valve 72 is installed on the air inlet pipe 71.

[0060] The material cylinder 122 is installed on top of the connecting cylinder 73.

[0061] When the third check valve 126 is opened, the first check valve 72 of the air pressure balance component 7 is opened, and the outside air enters the oil tank 4 through the air inlet pipe 71 and the connecting cylinder 73, adjusting the air pressure in the oil tank 4 to the normal pressure state, making it easier for the oil to be discharged and reducing the difficulty of discharge.

[0062] Example 3

[0063] Example 3 is a further improvement on Example 2.

[0064] like Figure 1 and 4 As shown, a third limiting component 11 is also connected to the upper end of the side wall of the frame 1. The third limiting component 11 is used to limit the quantitative oil injection component 12. The third limiting component 11 cooperates with the horizontal limiting component to achieve the overall limiting of the oil tank 4.

[0065] The third limiting component 11 includes a second connecting frame 111 and a limiting horizontal plate 112. The end of the second connecting frame 111 near the upright part of the frame 1 is fixedly connected to the second connecting frame 111. The end of the second connecting frame 111 away from the upright part of the frame 1 is symmetrically fixedly connected to the limiting horizontal plate 112. The inner wall of the limiting horizontal plate 112 is in contact with the outer end of the material cylinder 122.

[0066] The first limiting component 3 and the second limiting component 6 of the horizontal limiting assembly limit both sides of the oil drum 4 to achieve horizontal limiting of the oil drum 4. At the same time, the third limiting component 11 limits the quantitative oil injection component 12, and the quantitative oil injection component 12 limits the rotation of the oil drum 4, completely limiting the oil drum 4 in the horizontal direction to prevent the oil drum 4 from shaking when moving and to ensure the stability of the oil drum 4.

[0067] In use, place the oil drum 4 on the weighing assembly 14, then connect the air pressure balancing assembly 7 to the straight pipe 13. The oil suction pipe 127 of the metering oil injection assembly 12 is located inside the oil drum 4. The metering oil injection assembly 12 is easy to use with the oil drum 4, reducing the complexity of operation. The first limiting assembly 3 of the horizontal limiting assembly drives the horizontal movable plate 33 to move upward, and the horizontal movable plate 33 drives the limiting straight plate 31 to move upward. The side wall of the limiting straight plate 31 is in contact with the right side wall of the oil drum 4. The second limiting assembly... The left side wall of the arc-shaped limiting plate 62 of component 6 is in contact with the limiting straight plate 31 and the arc-shaped limiting plate 62 to limit the oil drum 4 on both sides, thereby achieving horizontal limitation of the oil drum 4. At the same time, the second connecting frame 111 of the third limiting component 11 limits the material cylinder 122 of the quantitative oil injection component 12. The material cylinder 122 limits the rotation of the oil drum 4 through the connecting cylinder 73, completely limiting the oil drum 4 in the horizontal direction, preventing the oil drum 4 from shaking during movement, and ensuring the stability of the oil drum 4. Pushing the handle 9, the handle 9 pushes the machine. Frame 1, under the action of casters 2, the oil injection pipe 124 of the quantitative oil injection assembly 12 moves to the oil injection position, placing the oil outlet of the oil injection pipe 124 at the oil injection position of the electromechanical equipment. Controller 10 controls the linear drive assembly 121, which drives the piston 125 upward. The third one-way valve 126 opens, and the second one-way valve 123 closes. Oil in the oil tank 4 enters the material cylinder 122 through the oil suction pipe 127. Then, the linear drive assembly 121 drives the piston. When piston 125 moves downward, the third check valve 126 closes and the second check valve 123 opens. Piston 125 discharges a fixed amount of oil from the material cylinder 122 through the oil injection pipe 124, injecting a fixed amount of oil into the electromechanical equipment. It has a quantitative filling function. When the third check valve 126 opens, the first check valve 72 of the air pressure balance component 7 opens. External gas enters the oil tank 4 through the air inlet pipe 71 and the connecting cylinder 73, adjusting the air pressure in the oil tank 4 to a normal pressure state, making it easier to discharge the oil and reducing the difficulty of discharge.

[0068] Among them, the electronic scale 141 and the support base plate 142 of the weight measuring component 14 work together to monitor the weight of the oil in the oil drum 4 in real time, so as to make it easy to know the weight of the oil in the oil drum 4. At the same time, when the weight of the oil in the oil drum 4 is lower than the set value, the controller 10 controls the speaker 8 to perform a voice alarm.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromechanical electrical automatic maintenance device, comprising a frame (1), universal wheels (2), an oil tank (4) and a straight pipe (13), characterized in that: The rack (1) bottom is fixedly connected with universal wheels (2) at equal intervals along the circumferential direction; The rack (1) transverse part one end is fixedly connected with a battery mounting box (5), the battery mounting box (5) is installed with a battery (15), the rack (1) top is fixedly connected with a controller (10), the rack (1) side wall is fixedly connected with a loudspeaker (8); The rack (1) transverse part other end top is connected with a weight measurement assembly (14), the weight measurement assembly (14) top is supported with an oil drum (4), the oil drum (4) top straight hole is fixedly connected with a straight pipe (13), the weight measurement assembly (14) is used for monitoring the oil weight in the oil drum (4); The rack (1) is connected with a horizontal limiting assembly, the horizontal limiting assembly is in contact with the oil drum (4) outer wall, realizing the horizontal limiting of the oil drum (4); The straight pipe (13) is sealingly connected with a gas pressure balance assembly (7), the gas pressure balance assembly (7) is used for the gas pressure balance in the oil drum (4); The gas pressure balance assembly (7) top is connected with a quantitative oil injection assembly (12), the quantitative oil injection assembly (12) is installed on the gas pressure balance assembly (7) top, the quantitative oil injection assembly (12) includes a linear drive assembly (121), a barrel (122), a second check valve (123), an oil injection pipe (124), a piston (125), a third check valve (126) and an oil suction pipe (127), the barrel (122) top is installed with the linear drive assembly (121), the linear drive assembly (121) is drivenly connected with the piston (125), and the piston (125) outer wall is slidingly connected with the barrel (122) outer wall, the barrel (122) side wall lower end liquid outlet is fixedly connected with the oil injection pipe (124), the oil injection pipe (124) is installed with the second check valve (123), the barrel (122) bottom liquid inlet bottom is fixedly connected with the oil suction pipe (127), and the oil suction pipe (127) is installed with the third check valve (126); The controller (10) electric control output end is electrically connected with the loudspeaker (8), the linear drive assembly (121), the weight measurement assembly (14) and the battery (15) electric control input end; The horizontal limiting assembly includes a second limiting assembly (6) and a first limiting assembly (3), the second limiting assembly (6) is installed on the rack (1) upright part side wall, the first limiting assembly (3) is installed on the rack (1) transverse part outer end; The first limiting assembly (3) comprises a limiting straight plate (31), a straight sliding hole (32), a transverse movable plate (33), a straight sliding groove (34) and an elastic member (35), the straight sliding groove (34) is arranged on the side wall of the transverse part of the rack (1), the straight sliding hole (32) is arranged on the top of the transverse part of the rack (1), the elastic member (35) is fixedly connected to the inner bottom of the transverse part of the rack (1), the top of the elastic member (35) is fixedly connected with the transverse movable plate (33), the transverse movable plate (33) is slidably connected with the straight sliding groove (34), the top of the transverse movable plate (33) is fixedly connected with the limiting straight plate (31), and the limiting straight plate (31) is slidably connected with the straight sliding hole (32). The air pressure balancing assembly (7) comprises an air inlet pipe (71), a first one-way valve (72) and a connecting cylinder (73), the connecting cylinder (73) is threadedly connected with the straight pipe (13), the air inlet pipe (71) is fixedly connected to the side wall air hole of the connecting cylinder (73), and the first one-way valve (72) is mounted on the air inlet pipe (71).

2. The electromechanical electric self-control maintenance device according to claim 1, characterized in that, The weight metering assembly (14) comprises an electronic scale (141), a supporting bottom plate (142) and a mounting groove (143), the mounting groove (143) is arranged on the top of the transverse part of the rack (1), the electronic scale (141) is mounted in the mounting groove (143), the sensing end of the electronic scale (141) is fixedly connected with the supporting bottom plate (142), and the top of the supporting bottom plate (142) is in abutting contact with the bottom of the oil drum (4).

3. The electromechanical electric self-control maintenance device according to claim 1, characterized in that, The second limiting assembly (6) comprises a first connecting frame (61) and an arc-shaped limiting plate (62), the first connecting frame (61) is fixedly connected with the side wall of the rack (1), the arc-shaped limiting plate (62) is fixedly connected to the end, away from the first connecting frame (61), and the side wall, away from the rack (1), of the arc-shaped limiting plate (62) is slidably connected with the outer wall of the oil drum (4).

4. The electromechanical electric self-control maintenance device according to claim 3, characterized in that, The bottom of the oil suction pipe (127) is 2cm higher than the inner bottom of the oil drum (4).

5. The electromechanical electric self-control maintenance device according to claim 4, characterized in that, When the third one-way valve (126) is opened, the air inlet pipe (71) is opened and the second one-way valve (123) is closed, and when the third one-way valve (126) is closed, the air inlet pipe (71) is closed and the second one-way valve (123) is opened.

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