Compact gearbox volume adaptive seal oil cup

Abstract

A compact gearbox volume self-adapting sealing oil cup, which comprises an oil cup body with a hollow inside and open ends and an elastic bag connected with the oil cup body and covering the open end to form an oil cavity with elastic sealing on one side; in application, when the lubricating oil expands, the expanded lubricating oil enters the oil cavity, then the elastic bag deforms to increase the oil cavity, the expanded lubricating oil moves to the oil cavity and cannot overflow outward, and at this time the sealing of the gearbox can still be ensured; when the oil temperature of the lubricating oil decreases, the lubricating oil falls back to the lubricating oil cavity and cannot cause obvious reduction of the oil, and the lubricating effect is not affected. Therefore, the design is small in size and does not affect the lubricating effect.

Description

Technical Field

[0001] This invention relates to a sealing oil cup, belonging to the field of sealing equipment, and particularly to a compact gearbox volume adaptive sealing oil cup. Background Technology

[0002] The valve actuator can be installed in any direction on the pipeline, so the gearbox of its transmission mechanism must be sealed and cannot be open. In addition, in order to ensure sufficient lubrication of the gear transmission and multiple rotating seals in the gearbox of the valve actuator, the lubricating oil needs to be filled.

[0003] When a gearbox operates for an extended period of time, it generates heat, which causes the lubricating oil to expand. Since the gearbox is filled with lubricating oil and is sealed, the lubricating oil needs to find space to overflow. If no measures are taken to drain the expanded lubricating oil, the seal will fail.

[0004] Conventional gearboxes solve this problem by using an expansion tank. However, for compact valve actuators, the expansion tank is too large to be suitable. Moreover, lubricating oil flowing into the expansion tank will reduce the amount of lubricating oil in the gearbox, affecting the lubrication effect. Therefore, a small sealing device is needed that can achieve a good seal without affecting the amount of lubricating oil.

[0005] The information disclosed in this background section is intended only to enhance understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects and problems of existing technologies, such as large size and poor lubrication effect, and to provide a compact gearbox volume adaptive sealing oil cup that is smaller in size and does not affect the lubrication effect.

[0007] To achieve the above objectives, the technical solution of the present invention is: a compact gearbox volume adaptive sealing oil cup, wherein the sealing oil cup includes an oil cup body and an elastic bladder;

[0008] The interior of the oil cup body is formed as a hollow cavity. The top of the oil cup body is an open end, and the bottom of the oil cup body is a closed end. An oil perforation is provided in the middle of the closed end, and the open end and the oil perforation are interconnected.

[0009] The elastic bladder is connected to the top of the oil cup body, and the elastic bladder covers the open end. The hollow cavity area between the elastic bladder and the oil perforation forms an oil cavity with one side elastically sealed.

[0010] The elastic bladder includes a horizontal outer rim and a recessed central body, the rim and body being connected to form a bowl-shaped rubber bladder.

[0011] The rim of the bowl overlaps with the open end of the top of the oil cup body, and the bowl body extends downward through the open end into the hollow cavity.

[0012] A cover plate is provided on one side of the elastic bladder, and the cover plate clamps and fixes the rim of the bowl to the oil cup body; an air perforation hole is provided at the axis of the cover plate, and an air outlet cavity is formed in the hollow cavity area between the cover plate and the bowl body, and the air outlet cavity is connected to the outside through the air perforation hole.

[0013] An elastic element and a pressure plate are provided inside the air outlet chamber. One end of the elastic element is connected to the middle of the bottom surface of the cover plate, and the other end of the elastic element is connected to the top surface of the pressure plate. The bottom surface of the pressure plate abuts against the middle of the top surface of the bowl body.

[0014] A connector is fixedly connected to the bottom surface of the closed end. The connector is a cylinder with an oil passage hole formed at both ends through the shaft in the middle. The oil passage hole is connected to the oil through hole and is connected to the oil cavity through the oil through hole. The outer periphery of the connector is provided with threads.

[0015] The top of the oil cup body protrudes outwards to form an edge portion, and the top surface of the edge portion is provided with several countersunk holes, each of which is equipped with a bolt.

[0016] The cover plate has several through holes corresponding to several countersunk holes on its outer periphery. The bowl rim has several through holes corresponding to several through holes. The bolts pass through the through holes and through holes in sequence and extend into the countersunk holes to clamp and fasten the bowl rim.

[0017] An angle A is formed between the rim of the bowl and the body of the bowl, with an angle of 90°–180°; an angle B is formed between the body of the bowl and the inner wall of the oil cup body, with an angle of 0°–90°; the difference between the included angle A and included angle B is 0°–90°.

[0018] The bottom surface of the closed end is located at the outer periphery of the oil perforation axis and is recessed upward to form an annular groove, and an annular elastic element is provided in the annular groove.

[0019] The middle part of the bowl gradually narrows and indents downwards, extending into the hollow cavity, and the bottom surface of the bowl is separated from the closed end by a certain distance.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention discloses a compact gearbox volume-adaptive sealing oil cup, comprising an oil cup body with open ends and a hollow interior, and an elastic bladder. The elastic bladder is connected to the oil cup body and covers the open ends, forming an oil cavity with an elastic seal on one side. In application, when the lubricating oil expands, the expanded lubricating oil enters the oil cavity. Then, the elastic bladder deforms, increasing the size of the oil cavity. The expanded lubricating oil moves into the oil cavity without overflowing, thus maintaining the gearbox's sealing performance and solving the problem of thermal expansion and contraction of gearbox lubricating oil. When the lubricating oil temperature decreases, the lubricating oil falls back into the lubricating cavity without significantly reducing the oil volume or affecting the lubrication effect. Therefore, this invention is not only small in size but also does not affect the lubrication effect.

[0022] 2. In this invention, a compact gearbox volume adaptive sealing oil cup includes an elastic element and a pressure plate within the air outlet chamber. One end of the elastic element is connected to a cover plate, and the other end is connected to the pressure plate, which abuts against the cup body. In application, since the sealing oil cup may not be vertically upward, the cooled lubricating oil cannot immediately flow back entirely into the lubricating oil chamber. Therefore, the rebound pressure of the elastic element maintains the pressure within the oil chamber, ensuring that the lubricating oil volume does not decrease. Thus, this invention is not only small in size but also does not affect the lubrication effect.

[0023] 3. In the compact gearbox volume adaptive sealing oil cup of this invention, the elastic bladder is made of oil-resistant thin-film rubber. In application, the oil-resistant thin-film rubber can provide a complete seal with low resistance to expansion and deformation, and is easy to manufacture, which helps to ensure the volume of the sealing device. Therefore, this invention is not only small in size but also has a good sealing effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the oil cup body in this invention.

[0026] Figure 3 This is a schematic diagram of the elastic capsule in this invention.

[0027] Figure 4 This is a schematic diagram of the cover plate in this invention.

[0028] Figure 5 This is a schematic diagram showing the relative positions of the oil cup body of the present invention.

[0029] Figure 6 This is a schematic diagram of the included angles A and B of the present invention.

[0030] Figure 7This is one of the structural diagrams of the cover plate in Embodiment 4 of the present invention.

[0031] Figure 8 This is the second structural diagram of the cover plate in Embodiment 4 of the present invention.

[0032] In the diagram: 1. Oil cup body; 2. Elastic bladder; 21. Bowl-shaped rubber bladder; 22. Bowl rim; 23. Bowl body; 24. Perforation; 3. Cover plate; 31. Air perforation; 32. Air outlet chamber; 33. Cover plate perforation; 11. Hollow cavity; 12. Oil chamber; 13. Open end; 131. Closed end; 14. Oil perforation; 15. Edge; 16. Countersunk hole; 17. Bolt; 18. Annular groove; 19. Annular elastic element; 4. Elastic element; 5. Pressure plate; 6. Connector; 61. Oil passage hole; 62. Thread; 7. Gearbox cover; 71. Cover opening; 72. Lubricating oil chamber. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See Figure 1 — Figure 6 A compact gearbox volume adaptive sealing oil cup, the sealing oil cup comprising an oil cup body 1 and an elastic bladder 2;

[0035] The interior of the oil cup body 1 is formed as a hollow cavity 11. The top of the oil cup body 1 is an open end 13, and the bottom of the oil cup body 1 is a closed end 131. An oil perforation 14 is provided in the middle of the closed end 131, and the open end 13 and the oil perforation 14 are interconnected.

[0036] The elastic bladder 2 is connected to the top of the oil cup body 1. The elastic bladder 2 covers the open end 13. The hollow cavity 11 area between the elastic bladder 2 and the oil perforation 14 forms an oil cavity 12 with one side elastically sealed.

[0037] The elastic bladder 2 includes a horizontal outer rim portion 22 and a recessed central body portion 23, wherein the rim portion 22 and the body portion 23 are connected to form a bowl-shaped rubber bladder 21.

[0038] The rim 22 overlaps the open end 13 at the top of the oil cup body 1, and the bowl body 23 extends downward through the open end 13 into the hollow cavity 11.

[0039] A cover plate 3 is provided on one side of the elastic bladder 2. The cover plate 3 clamps and fixes the bowl edge 22 to the oil cup body 1. An air perforation hole 31 is provided at the axis of the cover plate 3. An air outlet 32 ​​is formed in the hollow cavity 11 area between the cover plate 3 and the bowl body 23. The air outlet 32 ​​is connected to the outside through the air perforation hole 31.

[0040] An elastic element 4 and a pressure plate 5 are provided inside the air outlet cavity 32. One end of the elastic element 4 is connected to the middle of the bottom surface of the cover plate 3, and the other end of the elastic element 4 is connected to the top surface of the pressure plate 5. The bottom surface of the pressure plate 5 abuts against the middle of the top surface of the bowl body 23.

[0041] The bottom surface of the closed end 131 is fixedly connected to a connector 6. The connector 6 is a cylinder with an oil passage hole 61 formed at both ends of the shaft through its middle part. The oil passage hole 61 is connected to the oil through hole 14 and is connected to the oil cavity 12 through the oil through hole 14. The outer periphery of the connector 6 is provided with a thread 62.

[0042] The top of the oil cup body 1 protrudes outwards to form an edge portion 15. The top surface of the edge portion 15 is provided with a plurality of countersunk holes 16, and each of the plurality of countersunk holes 16 is provided with a bolt 17.

[0043] The cover plate 3 has several cover plate through holes 33 corresponding to several countersunk holes 16 on its outer periphery. The bowl rim 22 has several through holes 24 corresponding to several cover plate through holes 33. The bolt 17 passes through the cover plate through holes 32 and through holes 24 in sequence and extends into the countersunk holes 16 to clamp and fasten the bowl rim 22.

[0044] An angle A is formed between the rim 22 and the body 23 of the bowl, with an angle of 90° to 180°; an angle B is formed between the body 23 and the inner wall of the oil cup body 1, with an angle of 0° to 90°; the difference between the angle A and the angle B is 0° to 90°.

[0045] The bottom surface of the closed end 131 is located at the outer periphery of the axis of the oil perforation 14, and an annular groove 18 is formed by an upward indentation. An annular elastic element 19 is provided in the annular groove 18.

[0046] The middle part of the bowl-shaped portion 23 gradually narrows and recesses downwards, extending into the hollow cavity 11, and the bottom surface of the bowl-shaped portion 23 is spaced a certain distance from the closed end 131.

[0047] The principle of this invention is explained as follows:

[0048] In this invention, an elastic bladder 2 is used instead of a piston structure because the piston structure inevitably has gaps, and its sealing performance is not as good as that of the elastic bladder 2. At the same time, the structure is more complex and it is not conducive to controlling the volume. Moreover, compared with the elastic bladder 2, the piston structure has greater expansion resistance, which is not conducive to the movement of lubricating oil.

[0049] Example 1:

[0050] See Figure 1 — Figure 6A compact gearbox volume adaptive sealing oil cup includes an oil cup body 1 and an elastic bladder 2. The interior of the oil cup body 1 is formed as a hollow cavity 11. The top end of the oil cup body 1 is an open end 13, and the bottom end of the oil cup body 1 is a closed end 131. An oil perforation 14 is provided in the middle of the closed end 131, and the open end 13 and the oil perforation 14 are interconnected. The elastic bladder 2 is connected to the top end of the oil cup body 1 and covers the open end 13. An oil cavity 12 with one side elastic seal is formed in the hollow cavity 11 region between the elastic bladder 2 and the oil perforation 14.

[0051] In application, this sealing oil cup is set on the gearbox cover 7 and fixed inside the cover opening 71 of the gearbox cover 7. The oil chamber 12 is connected to the lubricating oil chamber 72 through the oil perforation 14. At this time, the height of the oil perforation 14 and the oil chamber 12 is higher than that of the lubricating oil chamber 72. After the gearbox runs for a period of time, the lubricating oil heats up and expands, and the liquid level of the lubricating oil rises. It gradually moves upward through the oil perforation 14 and enters the oil chamber 12. When the oil chamber 12 is full of lubricating oil, the lubricating oil squeezes the elastic bladder 2. Due to the elasticity of the elastic bladder 2 itself, it will deform outward, and the space inside the oil chamber 12 will increase to accommodate the expanded lubricating oil. The oil chamber 12 is still in a sealed state at this time. When the lubricating oil cools down, the lubricating oil cools and contracts, and gradually falls back from the oil chamber 12 into the lubricating oil chamber 72. At the same time, the elastic bladder 2 gradually restores its own shape and pushes the residual lubricating oil in the oil chamber 12 back into the lubricating oil chamber 72, and the liquid level of the lubricating oil is restored.

[0052] Example 2:

[0053] The basic content is the same as in Example 1, except that:

[0054] The elastic bladder 2 includes a horizontal outer rim portion 22 and a recessed central bladder portion 23. The rim portion 22 and the bladder portion 23 are connected to form a bowl-shaped rubber bladder 21. The rim portion 22 overlaps the open end 13 at the top of the oil cup body 1, and the bladder portion 23 extends downward through the open end 13 into the hollow cavity 11.

[0055] In application, the elastic bladder 2 is prefabricated into a bowl shape. Firstly, the rim 22 of the bowl can provide clamping, which is conducive to fixing and sealing. Secondly, the shape of the bowl body 23 itself can provide a certain rebound pressure, which makes it easy to push the lubricant back into the lubricating oil cavity 72 after cooling.

[0056] Example 3:

[0057] The basic content is the same as in Example 2, except that:

[0058] A cover plate 3 is provided on one side of the elastic bladder 2. The cover plate 3 clamps and fixes the bowl edge 22 to the oil cup body 1. An air perforation hole 31 is provided at the axis of the cover plate 3. An air outlet 32 ​​is formed in the hollow cavity 11 area between the cover plate 3 and the bowl body 23. The air outlet 32 ​​is connected to the outside through the air perforation hole 31.

[0059] In application, the cover plate 3 serves to fix the elastic bladder 2. The air perforation 31 on the cover plate 3 connects the air outlet 32 ​​to the outside. When the lubricating oil expands and squeezes the elastic bladder 2, the air outlet 32 ​​will be compressed. The air in the air outlet 32 ​​needs to be transferred, otherwise it will prevent the normal deformation of the elastic bladder 2.

[0060] Example 4:

[0061] The basic content is the same as in Example 3, except that:

[0062] An elastic element 4 (preferably a spring) and a pressure plate 5 are provided inside the air outlet cavity 32. One end of the elastic element 4 is connected to the middle of the bottom surface of the cover plate 3, and the other end of the elastic element 4 is connected to the top surface of the pressure plate 5. The bottom surface of the pressure plate 5 abuts against the middle of the top surface of the bowl body 23.

[0063] In application, the elastic element 4 and the pressure plate 5 play a role in stabilizing the rebound pressure, which can push the lubricating oil back to the gearbox more stably.

[0064] See Figure 7 or Figure 8 The compression length of the elastic element 4 can be adjusted by changing the shape of the cover plate 3, thereby adjusting the magnitude of the expansion pressure. If the pressure is slightly too high, the cover plate 3 with a groove on the bottom surface can be replaced. If the pressure is slightly too low, the cover plate 3 with a protrusion on the bottom surface can be replaced. Because the space of the air outlet chamber 32 is limited, it is not convenient to adjust the compression of the spring by adjusting the number of thread turns to adjust the pressure.

[0065] Example 5:

[0066] The basic content is the same as in Example 4, except that:

[0067] The bottom surface of the closed end 131 is fixedly connected to a connector 6. The connector 6 is a cylinder with an oil passage hole 61 formed at both ends of the shaft through its middle part. The oil passage hole 61 is connected to the oil through hole 14 and is connected to the oil cavity 12 through the oil through hole 14. The outer periphery of the connector 6 is provided with a thread 62.

[0068] In application, the oil cup body 1 is fixedly connected to the box cover opening 71 by the connector 6 and the thread 62, making the connection more secure. The oil passage hole 61 and the oil through hole 14 are connected to the oil cavity 12. At this time, the level of the lubricating oil is basically flush with the bottom surface of the oil passage hole 61. When the lubricating oil is heated and expands, it moves upward and moves upward into the oil cavity 12 through the oil passage hole 61 and the oil through hole 14.

[0069] Example 6:

[0070] The basic content is the same as in Example 5, except that:

[0071] The top of the oil cup body 1 protrudes outwards to form an edge portion 15. The top surface of the edge portion 15 is provided with a plurality of countersunk holes 16, and bolts 17 are provided in each of the plurality of countersunk holes 16. The outer periphery of the cover plate 3 is provided with a plurality of cover plate through holes 33 corresponding to the plurality of countersunk holes 16. The rim portion 22 is provided with a plurality of through holes 24 corresponding to the plurality of cover plate through holes 33. The bolts 17 pass through the cover plate through holes 32 and through holes 24 in sequence and extend into the countersunk holes 16 to clamp and fasten the rim portion 22.

[0072] In application, the cover plate 3 secures the elastic bladder 2 to the oil cup body 1 with bolts 17. While providing clamping, the detachable structure facilitates the replacement and maintenance of the elastic bladder 2 and the cover plate 3.

[0073] Example 7:

[0074] The basic content is the same as in Example 6, except that:

[0075] The elastic bladder 2 is made of oil-resistant thin-film rubber.

[0076] In applications, oil-resistant film rubber is beneficial for complete sealing, has low expansion resistance, and is relatively easy to process and maintain.

[0077] Example 8:

[0078] The basic content is the same as in Example 7, except that:

[0079] The bottom surface of the closed end 131 is located at the outer periphery of the axis of the oil perforation 14, and an annular groove 18 is formed by an upward indentation. An annular elastic element 19 is provided in the annular groove 18.

[0080] In application, after the sealing oil cup is fixed, the annular elastic element 19 makes interference contact with the gearbox cover 7, which can further provide a seal for the sealing oil cup and prevent lubricating oil from overflowing from the gap between the connector 6 and the cover opening 71.

[0081] Example 9:

[0082] The basic content is the same as in Example 8, except that:

[0083] The middle part of the bowl-shaped portion 23 gradually narrows and recesses downwards, extending into the hollow cavity 11, and the bottom surface of the bowl-shaped portion 23 is spaced a certain distance from the closed end 131.

[0084] In application, after the lubricating oil expands, it moves to both sides through the gap between the bottom surface of the bowl 23 and the closed end 131. At the same time, the shape of the bowl 23 allows some lubricating oil to exist in the oil cavity 12, preventing any expansion from squeezing the elastic bladder 2, providing a certain threshold for compression expansion, and the deformation resistance of this shape is small.

[0085] Example 10:

[0086] The basic content is the same as in Example 9, except that:

[0087] An angle A is formed between the rim 22 and the body 23 of the bowl, with an angle of 90° to 180°; an angle B is formed between the body 23 and the inner wall of the oil cup body 1, with an angle of 0° to 90°; the difference between the angle A and the angle B is 0° to 90°.

[0088] In application, the difference between the included angle A and included angle B is 0° to 90°, in order to ensure that the lubricating oil experiences less resistance and expands more smoothly when it expands and compresses the elastic bladder 2.

[0089] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A compact gearbox volume-adaptive sealing oil cup, characterized in that: The sealing oil cup includes an oil cup body (1) and an elastic bladder (2); The interior of the oil cup body (1) is formed as a hollow cavity (11). The top of the oil cup body (1) is an open end (13), and the bottom of the oil cup body (1) is a closed end (131). An oil perforation (14) is provided in the middle of the closed end (131). The open end (13) and the oil perforation (14) are interconnected. The elastic bladder (2) is connected to the top of the oil cup body (1), the elastic bladder (2) covers the open end (13), and the hollow cavity (11) area between the elastic bladder (2) and the oil perforation (14) forms an oil cavity (12) with one side elastically sealed. The elastic bladder (2) includes an outer horizontal bowl rim (22) and a central recessed bowl body (23), the bowl rim (22) and the bowl body (23) being connected to form a bowl-shaped rubber bladder (21). The rim (22) overlaps the open end (13) at the top of the oil cup body (1), and the bowl body (23) extends downward through the open end (13) into the hollow cavity (11); A cover plate (3) is provided on one side of the elastic bladder (2), and the cover plate (3) clamps and fixes the bowl edge (22) to the oil cup body (1); an air perforation hole (31) is provided at the axis of the cover plate (3), and an air outlet cavity (32) is formed in the hollow cavity (11) area between the cover plate (3) and the bowl body (23), and the air outlet cavity (32) is connected to the outside through the air perforation hole (31).

2. The compact gearbox volume adaptive sealing oil cup according to claim 1, characterized in that: The air outlet cavity (32) is provided with an elastic element (4) and a pressure plate (5). One end of the elastic element (4) is connected to the middle of the bottom surface of the cover plate (3), and the other end of the elastic element (4) is connected to the top surface of the pressure plate (5). The bottom surface of the pressure plate (5) abuts against the middle of the top surface of the bowl body (23).

3. A compact gearbox volume adaptive sealing oil cup according to claim 2, characterized in that: The bottom surface of the closed end (131) is fixedly connected to a connector (6). The connector (6) is a cylinder with an oil passage hole (61) formed at both ends of the shaft through the middle. The oil passage hole (61) is connected to the oil through hole (14) and is connected to the oil chamber (12) through the oil through hole (14). The outer periphery of the connector (6) is provided with a thread (62).

4. A compact gearbox volume adaptive sealing oil cup according to claim 3, characterized in that: The top of the oil cup body (1) protrudes outwards to form an edge portion (15). The top surface of the edge portion (15) is provided with a plurality of countersunk holes (16), and each of the plurality of countersunk holes (16) is provided with a bolt (17).

5. A compact gearbox volume adaptive sealing oil cup according to claim 4, characterized in that: The cover plate (3) has several cover plate through holes (33) corresponding to several countersunk holes (16) on its outer periphery. The bowl rim (22) has several through holes (24) corresponding to several cover plate through holes (33). The bolt (17) passes through the cover plate through holes (33) and through holes (24) in sequence and extends into the countersunk hole (16) to clamp and fasten the bowl rim (22).

6. A compact gearbox volume adaptive sealing oil cup according to any one of claims 1-5, characterized in that: An angle A is formed between the rim (22) and the body (23) of the bowl, with an angle of 90° to 180°; an angle B is formed between the body (23) and the inner wall of the oil cup body (1), with an angle of 0° to 90°; the difference between the angle A and the angle B is 0° to 90°.

7. A compact gearbox volume adaptive sealing oil cup according to any one of claims 1-5, characterized in that: The bottom surface of the closed end (131) is located at the outer periphery of the axis of the oil perforation hole (14), and an annular groove (18) is formed by the upward indentation. An annular elastic element (19) is provided in the annular groove (18).

8. A compact gearbox volume adaptive sealing oil cup according to any one of claims 1-5, characterized in that: The middle part of the bowl (23) gradually narrows and is recessed downwards, extending into the hollow cavity (11), and the bottom surface of the bowl (23) is a certain distance away from the closed end (131).

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