Dispersing and stirring mechanism for coating production

Abstract

The utility model discloses a dispersing and stirring mechanism for coating production, which comprises a support frame, a stirring device is arranged on the support frame, the stirring device comprises a driving assembly, a stirring tank, a gear box and a stirring frame, the stirring tank is arranged below the gear box, the driving assembly is arranged at the top end of the support frame, the gear box is arranged on the other side of the support frame, and the stirring frame is arranged below the gear box. The stirring frame is installed below the gear box, the top end of the stirring frame is connected with the quick-change device, the quick-change device comprises an inserting sleeve, a limiting groove, a first spring, a second spring, an inserting mechanism, a pressing plate, a guide block, an inserting rod and an unlocking sleeve, the inserting sleeve is installed below the gear box, the inserting rod is installed at the top end of the stirring frame, and the limiting groove is formed in the side wall of the inserting sleeve; the first spring is installed in the limiting groove, the pressing plate is connected with the first spring, the guide block is arranged on the inner side of the pressing plate, the unlocking sleeve is arranged on the outer side of the inserting sleeve in a sleeving mode, one end of the second spring is connected with the unlocking sleeve, and the other end of the second spring is connected with the inserting sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of coating production, and more specifically, to a dispersing and stirring mechanism for coating production. Background Art

[0002] In the existing coating production technology, there are some deficiencies in the design and function realization of the dispersion and stirring mechanism, which affect the stirring and dispersing effect and the ease of use of the equipment.

[0003] First of all, the existing stirring mechanism usually adopts a relatively simple structure, mainly relying on a single stirring frame for stirring and dispersing. Although this design realizes the stirring function to a certain extent, it is easy to form a stable vortex in the stirring tank. The existence of the vortex will cause the coating raw materials to be unevenly distributed in the stirring tank. Some raw materials may gather in the center of the vortex, while other parts are less stirred. This uneven stirring effect will affect the dispersion quality of the coating and cause the performance of the coating product to be unstable. In addition, the stable vortex may also lead to the appearance of a stirring dead zone. Some raw materials will remain in the dead zone for a long time and cannot be effectively dispersed, further affecting the quality of the coating.

[0004] Secondly, the installation and disassembly process of the stirring rack in the existing device is relatively cumbersome and cannot be quickly replaced. In the paint production process, different formulas and products may require the use of stirring racks of different types or specifications to meet different stirring requirements. However, the replacement of the stirring rack in the existing device usually takes a long time and effort, and requires the use of special tools and relatively complicated disassembly and assembly steps, which not only affects the production efficiency, but also increases the difficulty of equipment maintenance. When the stirring rack is worn or damaged, the complexity of the replacement process will also lead to extended equipment downtime, affecting the execution of the production plan. The lack of the function of quickly replacing the stirring rack limits the flexibility and adaptability of the equipment and cannot meet the needs of modern paint production.

[0005] In addition, there are also some problems in the design of the transmission mechanism in the prior art. Many devices use a gear set to realize the operation of the stirring mechanism. Although this transmission method can complete power transmission to a certain extent, long-term use will cause gear wear and performance degradation. Gear wear will lead to reduced transmission efficiency, and the stirring power cannot be fully utilized, affecting the stirring effect. At the same time, worn gears will also produce loud noise, pollute the production environment, and affect the operator's work experience. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the problems existing in the prior art, the utility model provides a dispersing and stirring mechanism for coating production to solve the technical problems mentioned in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dispersing and stirring mechanism for coating production, comprising a support frame, a stirring device installed on the support frame, the stirring device comprising a driving assembly, a stirring tank, a gear box and a stirring frame, the stirring tank is arranged below the gear box, the driving assembly is installed at the top of the support frame, the gear box is installed on the other side of the support frame, the stirring frame is installed below the gear box, the top of the stirring frame is connected with a quick-change device, the quick-change device comprises a plug-in sleeve, a limiting groove, a first spring, a second spring, a plug-in mechanism, a pressing plate, a guide block, a plug-in rod and an unlocking sleeve, the plug-in sleeve is installed below the gear box, the plug-in rod is installed at the top of the stirring frame, the plug-in rod is detachably installed in the plug-in sleeve, the limiting groove is provided on the side wall of the plug-in sleeve, the first spring is movably installed in the limiting groove, the inner side of the pressing plate is connected to the first spring, the guide block is arranged on the inner side of the pressing plate, the unlocking sleeve is movably sleeved on the outer side of the plug-in sleeve, one end of the second spring is connected to the unlocking sleeve, and the other end of the second spring is connected to the plug-in sleeve.

[0010] The utility model is further configured as follows: a transmission shaft is provided in the gear box, a small gear is provided on the outside of the transmission shaft, a large gear is provided on one side of the small gear, the large gear and the small gear are meshed with each other, an internal gear is provided below the large gear, a transmission gear is provided on the inside of the internal gear, and the transmission gear is installed on the outside of the plug-in sleeve. The configuration of the above components realizes the rotation and revolution of the stirring frame.

[0011] The utility model is further configured as follows: a rack is provided on one side of the support frame, a gear sleeve is provided on one side of the rack, the gear sleeve is meshed with the rack, a connecting frame is provided on the outer side of the support frame, the connecting frame can be movably mounted on the support frame, the gear sleeve can be movably mounted on the connecting frame, a rotating rod is provided on one side of the gear sleeve, and a lubrication mechanism is provided in the corresponding gear.

[0012] The utility model is further configured such that the plug-in mechanism includes a plug-in slot and a plug-in frame, wherein the plug-in slot is arranged on a side wall of the plug-in rod, one end of the plug-in frame is engaged in the plug-in slot, and the other end of the plug-in frame is engaged in the outside of the plug-in sleeve, and the plug-in mechanism makes the engagement at the connection more stable.

[0013] The utility model is further configured that a third spring is provided on one side of the plug-in frame, and the third spring can be movably installed on the inner side of the plug-in frame. The configuration of the third spring makes the operation of the plug-in mechanism more stable.

[0014] The utility model is further configured such that the lubricating mechanism comprises an oil storage tank and an oil outlet hole, the oil storage tank is arranged on the inner side of the corresponding transmission gear, and the oil outlet hole is arranged on the side wall of the oil storage tank, so that the lubricating mechanism realizes self-lubrication of the gear set.

[0015] The utility model is further configured such that a sealing plate is provided in the oil storage bin, and a top plate is provided on one side of the sealing plate. The configuration of the above components can realize fixed-point lubrication.

[0016] The utility model is further configured that a push spring is provided on one side of the sealing plate, and the other end of the push spring is connected to the side wall of the oil storage bin. The configuration of the push spring facilitates the automatic resetting of the sealing plate, making the use of the lubrication mechanism more stable.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a dispersing and stirring mechanism for coating production, which has the following beneficial effects:

[0019] 1. The stirring device realizes efficient stirring and dispersion of the paint through the special matching structure of multiple components such as the support frame, drive assembly, gear box and stirring frame. This design not only overcomes the limitation that a single stirring frame is easy to form a stable vortex, but also realizes the rotation and revolution of the stirring frame. Through the unique matching of the internal gear and the transmission gear, the stirring frame rotates while revolving with the transmission shaft as the center, effectively preventing the appearance of stable vortices in the stirring tank and ensuring the uniform dispersion of the paint raw materials. This innovative stirring method eliminates the appearance of stirring dead zones and improves the dispersion quality of the paint and the stability of product performance.

[0020] 2. The quick-change device realizes the rapid replacement of the stirring frame through the cooperation of the plug-in sleeve, the limit groove, the first spring, the plug-in mechanism, the pressing plate, the guide block, the plug-in rod and the unlocking sleeve. This design greatly simplifies the replacement process and improves the convenience of use and production efficiency of the equipment. By pressing the pressing plate, the guide block and the unlocking sleeve are driven to move, the limit of the plug-in frame is released, and the plug-in rod is quickly disassembled. At the same time, the setting of multiple springs ensures the automatic resetting and reliable connection of the plug-in frame. The design of this quick-change device shortens the replacement time of the stirring frame, reduces the difficulty of maintenance, improves the flexibility and adaptability of the equipment, and meets the mixing requirements of different formulas and products.

[0021] 3. The lubrication mechanism realizes automatic lubrication of the gear set through the cooperation of the oil storage tank, oil outlet, sealing plate, top plate and push spring. This design effectively solves the problem of wear of the gears caused by long-term use and improves the transmission efficiency and reliability. When the gears are engaged, the top plate is squeezed, driving the sealing plate to move, opening the oil outlet, and realizing the automatic supply of lubricating oil. At the same time, the setting of the push spring ensures the automatic resetting of the sealing plate and the sealing of the oil outlet. This automatic lubrication design extends the service life of the gears, reduces the impact of wear on the transmission effect, reduces the generation of noise, and improves the overall performance and use experience of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a dispersing and stirring mechanism for coating production in the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the gearbox in the middle state of the utility model;

[0024] Figure 3 It is a schematic cross-sectional structure diagram of the lubrication mechanism part of the utility model;

[0025] Figure 4 It is a cross-sectional structural diagram of the quick-change device part of the utility model;

[0026] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0027] In the figure: 1. support frame; 2. drive assembly; 3. gear box; 4. stirring frame; 5. plug-in sleeve; 6. limit groove; 7. first spring; 8. second spring; 9. pressing plate; 10. guide block; 11. plug-in rod; 12. unlocking sleeve; 13. transmission shaft; 14. small gear; 15. large gear; 16. internal gear; 17. transmission gear; 18. rack; 19. gear sleeve; 20. connecting frame; 21. rotating rod; 22. plug-in groove; 23. plug-in frame; 24. third spring; 25. oil storage bin; 26. oil outlet hole; 27. sealing plate; 28. top plate; 29. ​​push spring; 40. stirring tank. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0031] See also Figure 1-5 A dispersing and stirring mechanism for coating production includes a support frame 1, a stirring device is installed on the support frame 1, the stirring device includes a driving assembly 2, a stirring tank 40, a gear box 3 and a stirring frame 4, the stirring tank 40 is arranged below the gear box 3, the driving assembly 2 is installed at the top of the support frame 1, the gear box 3 is installed at the other side of the support frame 1, the stirring frame 4 is installed below the gear box 3, and the top of the stirring frame 4 is connected with a quick-change device, the quick-change device includes a plug-in sleeve 5, a limiting groove 6, a first spring 7, a second spring 8, a plug-in mechanism, a pressing plate 9, Guide block 10, plug-in rod 11 and unlocking sleeve 12, the plug-in sleeve 5 is installed under the gear box 3, the plug-in rod 11 is installed at the top of the stirring frame 4, the plug-in rod 11 is detachably installed in the plug-in sleeve 5, the limiting groove 6 is opened on the side wall of the plug-in sleeve 5, the first spring 7 is movably installed in the limiting groove 6, the inner side of the pressing plate 9 is connected to the first spring 7, the guide block 10 is arranged on the inner side of the pressing plate 9, the unlocking sleeve 12 is movably sleeved on the outer side of the plug-in sleeve 5, one end of the second spring 8 is connected to the unlocking sleeve 12, and the other end of the second spring 8 is connected to the plug-in sleeve 5.

[0032] A transmission shaft 13 is provided in the gear box 3, a small gear 14 is provided on the outside of the transmission shaft 13, a large gear 15 is provided on one side of the small gear 14, the large gear 15 and the small gear 14 are meshed, an internal gear 16 is provided below the large gear 15, a transmission gear 17 is provided on the inside of the internal gear 16, and the transmission gear 17 is installed on the outside of the plug-in sleeve 5.

[0033] A rack 18 is provided on one side of the support frame 1, and a gear sleeve 19 is provided on one side of the rack 18. The gear sleeve 19 is meshed with the rack 18. A connecting frame 20 is provided on the outer side of the support frame 1. The connecting frame 20 can be movably mounted on the support frame 1, and the gear sleeve 19 can be movably mounted on the connecting frame 20. A rotating rod 21 is provided on one side of the gear sleeve 19, and a lubrication mechanism is provided in the corresponding gear.

[0034] The plug-in mechanism includes a plug-in slot 22 and a plug-in frame 23 . The plug-in slot 22 is provided on the side wall of the plug-in rod 11 . One end of the plug-in frame 23 is engaged in the plug-in slot 22 , and the other end of the plug-in frame 23 is engaged in the outer side of the plug-in sleeve 5 .

[0035] A third spring 24 is provided on one side of the plug-in frame 23 , and the third spring 24 is movably mounted on the inner side of the plug-in frame 23 .

[0036] In this embodiment, when the paint needs to be dispersed and stirred, the paint is first placed in the stirring tank 40, and then the gear sleeve 19 is driven to rotate by the rotating rod 21. Since the rack 18 is meshed with one side of the gear sleeve 19, the gear sleeve 19 will drive the connecting frame 20 to rise on the supporting frame 1, so that the stirring frame 4 enters the stirring tank 40, and then the driving assembly 2 is opened, and the driving assembly 2 drives the transmission shaft 13 extending from the top of the gear box 3 to rotate, thereby driving the small gear 14 set on the outside of the transmission shaft 13 to rotate, and then the small gear 14 drives the gear 14 meshed with it. The large gear 15 rotates, and then the large gear 15 drives the transmission shaft 13 connected inside to rotate, thereby driving the internal gear 16 to rotate, and then the internal gear 16 drives the transmission gear 17 arranged inside to rotate. Due to the unique matching structure of the internal gear 16 and the transmission gear 17, the stirring frame 4 will revolve around the transmission shaft 13 arranged inside the large gear 15 as the center of the circle while rotating, thereby preventing a stable vortex from appearing in the stirring tank 40, and then evenly stirring and dispersing the paint. When the stirring frame 4 needs to be replaced, the pressing plates 9 arranged on both sides are simultaneously moved inward. The pressing plate 9 will slide in the limiting groove 6 and compress the first spring 7 arranged in the limiting groove 6. Due to the special structural design of the guide block 10, when the pressing plate 9 drives the guide block 10 to move inward, the symmetrically arranged unlocking sleeve 12 will move outward at the same time, and the unlocking sleeve 12 will compress the second spring 8 arranged on one side. When the pressing plate 9 can no longer be pressed, the outer side of the plug-in frame 23 loses the limit of the unlocking sleeve 12, and then the third spring 24 connected to the inner side of the plug-in frame 23 will reset, thereby driving one end of the plug-in frame 23 to move out of the plug-in groove. 22 is disengaged, and then the connecting rod 11 is pulled downward to remove the stirring frame 4, and then the new stirring frame 4 is taken out, and the connecting rod 11 set at the top of the stirring frame 4 is inserted into the connecting sleeve 5, and then the pressing plate 9 is released, and the first spring 7 will drive the limiting frame and the guide block 10 to reset, and then the second spring 8 set on one side of the unlocking sleeve 12 will push the unlocking sleeve 12 to reset, so that the unlocking sleeve 12 limits the connecting frame 23 again, and then the connecting frame 23 will compress the third spring 24 again, and at the same time, one end of the connecting frame 23 will be engaged with the connecting slot 22.

[0037] See also Figure 1-3 As an implementation method of a dispersion stirring mechanism for coating production, the lubrication mechanism includes an oil storage tank 25 and an oil outlet 26 . The oil storage tank 25 is opened on the inner side of the corresponding transmission gear 17 , and the oil outlet 26 is opened on the side wall of the oil storage tank 25 .

[0038] A sealing plate 27 is provided in the oil storage bin 25 , and a top plate 28 is provided on one side of the sealing plate 27 .

[0039] A push spring 29 is provided on one side of the sealing plate 27 , and the other end of the push spring 29 is connected to the side wall of the oil storage bin 25 .

[0040] More specifically, when the corresponding gear rotates, the teeth of the gear meshing with the corresponding gear will contact the top plate 28, and then the top plate 28 will drive the sealing plate 27 to move, and then the top plate 28 will be collected into the oil storage tank 25, and the sealing plate 27 will compress the push spring 29 connected to one side, and then the oil outlet 26 will be connected to the oil storage tank 25, and then the lubricating oil stored in the oil storage tank 25 will flow to the meshed gear through the oil outlet 26, thereby realizing the lubrication of the gear set, and then the gear continues to rotate, the top plate 28 is no longer squeezed, and the push spring 29 will drive the sealing plate 27 and the top plate 28 to reset, so that the sealing plate 27 seals the top plate 28 again.

[0041] In summary, when the overall equipment is in use or running: when the paint needs to be dispersed and stirred, the paint is first put into the stirring tank 40, and then the gear sleeve 19 is driven to rotate by the rotating rod 21. Since the rack 18 is meshed with one side of the gear sleeve 19, the gear sleeve 19 will drive the connecting frame 20 to rise on the supporting frame 1, so that the stirring frame 4 enters the stirring tank 40, and then the driving assembly 2 is turned on. The driving assembly 2 drives the transmission shaft 13 extending from the top of the gear box 3 to rotate, thereby driving the small gear 14 set on the outside of the transmission shaft 13 to rotate, and then the small gear 1 4 drives the large gear 15 meshing with it to rotate, and then the large gear 15 drives the transmission shaft 13 connected inside to rotate, thereby driving the internal gear 16 to rotate, and then the internal gear 16 drives the transmission gear 17 set inside to rotate. Due to the unique matching structure of the internal gear 16 and the transmission gear 17, the stirring frame 4 will revolve around the transmission shaft 13 set inside the large gear 15 as the center of the circle while rotating, thereby preventing a stable vortex from appearing in the stirring tank 40, and then evenly stirring and dispersing the paint. When the stirring frame 4 needs to be replaced, the pressing When the pressing plate 9 is pressed inward, the pressing plate 9 will slide in the limiting groove 6 and compress the first spring 7 arranged in the limiting groove 6. Due to the special structural design of the guide block 10, when the pressing plate 9 drives the guide block 10 to move inward, the symmetrically arranged unlocking sleeve 12 will move outward at the same time, and the unlocking sleeve 12 will compress the second spring 8 arranged on one side. When the pressing plate 9 can no longer be pressed, the outer side of the plug-in frame 23 loses the limit of the unlocking sleeve 12, and then the third spring 24 connected to the inner side of the plug-in frame 23 will be reset, thereby driving one end of the plug-in frame 23 to move out of the plug-in frame. The stirring frame 4 is disengaged from the connecting groove 22, and then the connecting rod 11 is pulled downward to remove the stirring frame 4, and then the new stirring frame 4 is taken out, the connecting rod 11 set at the top of the stirring frame 4 is inserted into the connecting sleeve 5, and then the pressing plate 9 is released, the first spring 7 will drive the limiting frame and the guide block 10 to reset, and then the second spring 8 set on one side of the unlocking sleeve 12 will push the unlocking sleeve 12 to reset, so that the unlocking sleeve 12 limits the connecting frame 23 again, and then the connecting frame 23 will compress the third spring 24 again, and at the same time, one end of the connecting frame 23 will be engaged with the connecting groove 22.

[0042] When the corresponding gear rotates, the teeth of the gear meshing with the corresponding gear will contact the top plate 28, and then the top plate 28 will drive the sealing plate 27 to move, and then the top plate 28 will be collected into the oil storage tank 25, and the sealing plate 27 will compress the push spring 29 connected to one side, and then the oil outlet 26 will be connected to the oil storage tank 25, and then the lubricating oil stored in the oil storage tank 25 will flow to the meshed gear through the oil outlet 26, thereby realizing the lubrication of the gear set, and then the gear continues to rotate, the top plate 28 is no longer squeezed, and the push spring 29 will drive the sealing plate 27 and the top plate 28 to reset, so that the sealing plate 27 seals the top plate 28 again.

[0043] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A dispersing and stirring mechanism for coating production, comprising a support frame (1), characterized in that: The support frame (1) is provided with a stirring device, the stirring device comprising a driving assembly (2), a stirring tank (40), a gear box (3) and a stirring frame (4), the stirring tank (40) being arranged below the gear box (3), the driving assembly (2) being arranged at the top of the support frame (1), the gear box (3) being arranged at the other side of the support frame (1), the stirring frame (4) being arranged below the gear box (3), the top of the stirring frame (4) being connected with a quick-change device, the quick-change device comprising a plug-in sleeve (5), a limiting groove (6), a first spring (7), a second spring (8), a plug-in mechanism , a pressing plate (9), a guide block (10), a plug-in rod (11) and an unlocking sleeve (12), wherein the plug-in sleeve (5) is installed below the gear box (3), the plug-in rod (11) is installed at the top of the stirring frame (4), the limiting groove (6) is opened on the side wall of the plug-in sleeve (5), the first spring (7) is installed in the limiting groove (6), the pressing plate (9) is connected to the first spring (7), the guide block (10) is arranged on the inner side of the pressing plate (9), the unlocking sleeve (12) is sleeved on the outer side of the plug-in sleeve (5), one end of the second spring (8) is connected to the unlocking sleeve (12), and the other end is connected to the plug-in sleeve (5).

2. A dispersing and stirring mechanism for coating production according to claim 1, characterized in that: A transmission shaft (13) is provided inside the gear box (3), a small gear (14) is provided outside the transmission shaft (13), a large gear (15) is provided on one side of the small gear (14), the large gear (15) and the small gear (14) are meshed with each other, an internal gear (16) is provided below the large gear (15), a transmission gear (17) is provided inside the internal gear (16), and the transmission gear (17) is installed on the outside of the plug-in sleeve (5).

3. A dispersing and stirring mechanism for coating production according to claim 2, characterized in that: A rack (18) is provided on one side of the support frame (1), a gear sleeve (19) is provided on one side of the rack (18), the gear sleeve (19) is meshed with the rack (18), a connecting frame (20) is sleeved on the outer side of the support frame (1), the connecting frame (20) is movably mounted on the support frame (1), the gear sleeve (19) is movably mounted on the connecting frame (20), a rotating rod (21) is provided on one side of the gear sleeve (19), and a lubrication mechanism is provided in the corresponding gear.

4. A dispersing and stirring mechanism for coating production according to any one of claims 1 to 3, characterized in that: The plug-in mechanism comprises a plug-in slot (22) and a plug-in frame (23); the plug-in slot (22) is provided on a side wall of the plug-in rod (11); one end of the plug-in frame (23) is engaged in the plug-in slot (22); and the other end of the plug-in frame (23) is engaged in the outside of the plug-in sleeve (5).

5. A dispersing and stirring mechanism for coating production according to claim 4, characterized in that: A third spring (24) is provided on one side of the plug-in frame (23), and the third spring (24) is movably mounted on the inner side of the plug-in frame (23).

6. A dispersing and stirring mechanism for coating production according to claim 3, characterized in that: The lubricating mechanism comprises an oil storage bin (25) and an oil outlet hole (26); the oil storage bin (25) is disposed on the inner side of the corresponding transmission gear (17); and the oil outlet hole (26) is disposed on the side wall of the oil storage bin (25).

7. A dispersing and stirring mechanism for coating production according to claim 6, characterized in that: A sealing plate (27) is provided in the oil storage bin (25), and a top plate (28) is provided on one side of the sealing plate (27).

8. A dispersing and stirring mechanism for coating production according to claim 7, characterized in that: A push spring (29) is provided on one side of the sealing plate (27), and the other end of the push spring (29) is connected to the side wall of the oil storage bin (25).

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