Suspension type transformer

Abstract

The invention relates to the field of transformers, in particular to a suspension type transformer which comprises a transformer body, an oil tank fixedly arranged on one side of the top of the transformer body and a heat dissipation structure arranged on the outer wall of the transformer body and capable of adjusting the angle along with the wind direction. The heat dissipation structure further comprises two oil injection plates communicated with oil in the transformer body through oil injection pipes, and the two oil injection plates are symmetrically distributed on the outer walls of the front face and the back face of the transformer body. And the radiating fins are rotationally arranged between the oil injection plates and can adjust the angle along with the wind direction. According to the invention, the inclination angle is adjusted through blowing of the wind shield by natural wind from up, down, left and right, so that the heat dissipation fins are driven to form windward slopes catering to the wind direction, and the natural wind can be ensured to be fully contacted with the side edge of the transformer body and the heat dissipation fins; and the radiating fins with the inclination angles changed by wind power all the time can better prevent birds and small animals from entering gaps of the fins to nest.

Description

Technical Field

[0001] The invention relates to the field of transformers, and in particular to a suspended transformer. Background Art

[0002] The transformer is mainly composed of three main components: the primary coil, the secondary coil and the iron core. In electrical equipment and telecommunications equipment, transformers are often used to increase or decrease voltage, match impedance, etc.

[0003] For example, the heat dissipation transformer disclosed in the publication number CN115188566A can effectively dissipate heat for the transformer body in hot summer to avoid dangerous overheating of the transformer body. At the same time, during the circulation of the insulating oil, the filter plate will filter the impurities inside the insulating oil, thereby effectively slowing down the deterioration of the insulating oil, improving the service life of the device, reducing the safety hazards caused by the deterioration of the insulating oil, and thus improving the safety of the device. However, the thin-film heat dissipation fins are often fixed, and the air in the gaps between the heat dissipation fins is relied on to achieve rapid heat dissipation of the oil, resulting in a relatively closed and high-temperature narrow space between the fins.

[0004] Specifically, thin-sheet heat sink fins, as an important component of heat-dissipating transformers, are usually designed in a fixed and tight connection method to ensure the structural stability and continuity of the heat dissipation effect between the fins. This fixed connection method allows a certain distance between the fins to form numerous tiny channels. The main function of these channels is to allow air to flow freely so as to effectively remove the heat accumulated on the fins, thereby achieving rapid heat dissipation of the oil inside the transformer;

[0005] In the heat dissipation process, the air in the fin gap plays a vital role. When the transformer is running, the heat generated inside it will be transferred to the fins by oil heat conduction. Subsequently, the heat will be quickly carried away by the air flowing in the fin gap and dissipated into the surrounding environment. This design not only improves the heat dissipation efficiency, but also ensures the stability and safety of the transformer under long-term, high-load operation. However, the heat dissipation of traditional transformers mainly relies on the relatively wide heat dissipation fins to fit the side of the transformer, and the heat dissipation fins are used to form cooling by contact with the air. Although it has a certain heat dissipation effect, the presence of the heat dissipation fins blocks the direct contact between the outside air and the side of the transformer. The limitation is that it is impossible to better utilize natural wind for heat exchange cooling of the transformer. The present invention aims to retain the heat dissipation of the traditional radiator and solve the problem that the transformer is blocked by the heat dissipation fins and cannot form convection with the natural wind.

[0006] Secondly, the traditional heat sink fins maintain a relatively static and high-temperature narrow space. The gap between the fins is used to ensure efficient air circulation to dissipate the heat of the oil in the fins. However, the heat sink fins on both sides of the traditional transformer are fixed and have a higher temperature than the external environment. When the outside temperature is low in winter, this relatively closed and temperature-suitable space becomes an ideal place for birds and small animals to nest and overwinter. These animals build nests in the gaps between the fins, which may not only hinder the normal flow of air and affect the heat dissipation effect, but also cause poor heat dissipation due to the clogging of the fin gaps by nesting materials, further aggravating the heat load of the transformer. In addition, the activities of the animals may also pose a potential threat to the structural stability of the fins and the electrical safety of the transformer. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a suspended transformer to solve the technical problem in the prior art of maintaining the efficient heat dissipation performance of the heat dissipation fins while effectively preventing animals from nesting and interfering.

[0008] Based on the above purpose, the present invention provides a suspended transformer, comprising a transformer body, an oil tank fixedly arranged on one side of the top of the transformer body, and a heat dissipation structure arranged on the outer wall of the transformer body and capable of adjusting the angle according to the wind direction, wherein the heat dissipation structure further comprises: an oil filling plate connected to the oil inside the transformer body through an oil filling pipe, and the oil filling plates are two outer walls symmetrically distributed on the front and back sides of the transformer body;

[0009] The heat dissipation fins are rotatably arranged between the oil injection plates and can be adjusted in angle according to the wind direction, and the top and bottom of the heat dissipation fins are connected to the oil injection plates through the oil injection shaft;

[0010] A driving component for driving the heat dissipation structure to adjust the heat dissipation angle according to the wind direction;

[0011] The drive assembly comprises:

[0012] Wind shields are slidably arranged on both sides of the transformer body;

[0013] A driving block arranged at the bottom of the windshield for sliding the windshield, and a push rod slidably arranged in the driving block for driving the heat dissipation fins to rotate;

[0014] A frame assembly for driving the heat dissipation structure to rotate and adjust;

[0015] The frame assembly comprises:

[0016] Rotate a main shaft block disposed on the outer wall of the transformer body;

[0017] A movable plate is fixedly connected to the outer walls on both sides of the main shaft block so that the wind shield plate can drive the main shaft block to rotate.

[0018] Furthermore, a driving groove is provided at the bottom of the heat dissipation fin, and a driving rod is slidably arranged in the driving groove, and the driving rod is connected to the push rod.

[0019] Furthermore, a plurality of balls are slidably arranged in the driving block, the diameter of the balls is larger than the slot opening of the driving block, and the balls close to one end of the driving block are in push contact with the push rod.

[0020] Furthermore, a driving slider is fixedly connected to the bottom of the windshield, and the driving slider is arranged in the driving block and pushes and contacts the ball near the other end of the driving block.

[0021] Furthermore, the outer walls of the top and bottom of the spindle block are fixedly connected with connecting rods, and the connecting rods are fixedly connected to the oil injection plate so that the oil injection plate and the spindle block can rotate synchronously.

[0022] Furthermore, a limiting sliding groove is provided on the movable plate, and a limiting sliding block fixedly connected to the side wall of the wind shield plate is slidably arranged in the limiting sliding groove.

[0023] Furthermore, the wind shield is specifically "L"-shaped so that the wind shield can withstand natural wind forces from different directions.

[0024] Furthermore, the oil filling pipe is specifically a soft rubber pipe, and the oil filling pipe, the oil tank, the oil filling shaft and the heat dissipation fins form a closed oil circuit.

[0025] Beneficial effects of the present invention: A suspended transformer of the present invention is used, and the windshield is blown by the natural wind up, down, left, and right to adjust the tilt angle, so as to drive the heat dissipation fins to form a windward slope that caters to the wind direction, so as to ensure that the natural wind can fully contact the side of the transformer body and the heat dissipation fins, specifically:

[0026] 1. When the transformer body is blown by the lateral wind, the wind blows toward the windshields arranged on both sides of the transformer body. The windshields are pushed by the wind, driving the driving slider at the bottom of the windshield to slide to the other side in the driving block. While sliding, the driving slider contacts the ball, and then pushes the ball to move. There are several balls, and they move linearly, so that when the ball is driven by the driving slider, the ball farthest from the driving slider pushes the push rod to move out of the driving block, so that the push rod drives the driving rod to slide in the driving groove at the bottom of the heat sink fin. When the driving rod slides to one end of the driving groove, it drives the heat sink fin to rotate in the same direction, thereby forming an inclined surface that caters to the left and right winds;

[0027] When the wind shield is blown by the wind from above and below, it is allowed to rotate upward or downward through the movable plate with the main shaft block as the axis due to its limited sliding and the flow direction of the wind from above and below. While rotating, the oil filling plate is connected to the upper and lower outer walls of the main shaft block through a connecting rod, so that the main shaft block can synchronously drive the oil filling plate to rotate. After the oil filling plate and the wind shield are rotated through the main shaft block, the heat dissipating fins between the oil filling plates form an inclination angle from top to bottom or from bottom to top on the basis of the original windward slope, thereby ensuring that the natural wind blowing from above and below can fully contact the side of the transformer body and the heat dissipating fins, and the heat dissipating fins whose inclination angle is constantly changed by the wind can better prevent birds and small animals from entering the fin gaps to build nests. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the heat dissipation fins in the present invention in a right-rotating state;

[0030] Figure 2 It is another preferred angle schematic diagram of the heat dissipation fins in the present invention being rotated to the right;

[0031] Figure 3 It is a schematic diagram of the heat dissipation fins in the present invention in a state of rotating to the left;

[0032] Figure 4 It is another preferred angle schematic diagram of the heat dissipation fins in the present invention being rotated to the left;

[0033] Figure 5 It is a schematic diagram of the rotation state of the overall heat dissipation structure in the present invention;

[0034] Figure 6 It is a schematic diagram of another preferred angle of the rotation state of the overall heat dissipation structure in the present invention;

[0035] Figure 7 It is a schematic diagram of the heat dissipation structure in the present invention;

[0036] Figure 8 It is a schematic diagram of the frame components in the heat dissipation structure of the present invention;

[0037] Fig. 9 It is a schematic diagram of the driving and adjusting assembly of the heat dissipation fins in the present invention;

[0038] Fig.10 for Figure 6A partial enlarged view of the structure at A;

[0039] Fig.11 for Figure 7 A partial enlarged view of the structure at location B.

[0040] The markings in the figure are:

[0041] 1. Transformer body; 2. Oil filling plate; 3. Oil filling pipe; 4. Heat dissipation fin; 401. Oil filling shaft; 402. Drive groove; 5. Wind shield; 501. Drive slider; 6. Drive block; 601. Ball; 7. Movable plate; 8. Push rod; 9. Spindle block; 10. Connecting rod; 11. Drive rod. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] In a first aspect of the present invention, a suspension transformer is provided. Figure 1 , Figure 2 , Figure 3 As shown, it includes a transformer body 1, an oil tank fixedly arranged on one side of the top of the transformer body 1, and a heat dissipation structure arranged on the outer wall of the transformer body 1 and capable of adjusting the angle according to the wind direction. The heat dissipation structure also includes: an oil filling plate 2 connected to the oil inside the transformer body 1 through an oil filling pipe 3, and the oil filling plates 2 are two and symmetrically distributed on the outer walls of the front and back of the transformer body 1;

[0045] The heat dissipation fins 4 are rotatably arranged between the oil filling plates 2 and can adjust the angle according to the wind direction, and the top and bottom of the heat dissipation fins 4 are connected to the oil filling plates 2 through the oil filling shaft 401;

[0046] A driving component for driving the heat dissipation structure to adjust the heat dissipation angle according to the wind direction;

[0047] The drive components include:

[0048] Wind shields 5 are slidably arranged on both sides of the transformer body 1;

[0049] A driving block 6 disposed at the bottom of the windshield 5 for sliding movement of the windshield 5 and a push rod 8 slidably disposed in the driving block 6 for driving the heat dissipation fins 4 to rotate an angle;

[0050] A frame assembly for driving the heat dissipation structure to rotate and adjust;

[0051] Framework components include:

[0052] Rotate a main shaft block 9 arranged on the outer wall of the transformer body 1;

[0053] A movable plate 7 is fixedly connected to the outer walls of both sides of the main shaft block 9 so that the wind shield plate 5 can drive the main shaft block 9 to rotate.

[0054] As this embodiment, when the transformer body 1 is subjected to lateral wind, the wind blows toward the windshield plates 5 arranged on both sides of the transformer body 1. The windshield plates 5 are pushed by the wind and slide from one side of the driving block 6 to the other side thereof. While sliding, the driving block 6 drives the push rod 8 to move from left to right or from right to left. While the push rod 8 moves, it pushes the end of the heat dissipation fin 4, so that the array-shaped heat dissipation fins 4 are synchronously rotated into a left windward inclined surface or a right windward inclined surface that caters to the wind direction, so that the wind can better enter the gap between the heat dissipation fins 4 and fit the outer wall of the transformer body 1, thereby improving the heat dissipation efficiency of the transformer body 1;

[0055] When the transformer body 1 is subjected to wind from up and down, the wind drives the wind shield plate 5 to move up and down. While moving, the wind shield plate 5 is rotated upward or downward with the main shaft block 9 as the axis through the movable plate 7. While rotating, the oil filling plate 2 and the heat dissipation fins 4 are driven to rotate synchronously, so that the heat dissipation fins 4 form a windward inclined surface that caters to the up and down wind directions. The windward inclined surface of the heat dissipation fins 4 after deformation ensures that the natural wind can fully contact the side of the transformer body 1 and the heat dissipation fins 4. Compared with the traditional fixed thin-film heat sink, the wind resistance is small and the heat exchange efficiency is higher, thereby greatly improving the heat dissipation efficiency of the transformer body 1. In addition, the heat dissipation fins 4, which are always affected by the wind and change their angles, can better prevent birds and small animals from entering the fin gaps to build nests.

[0056] As an implementation method, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, a driving groove 402 is provided at the bottom of the heat dissipation fin 4 , and a driving rod 11 is slidably arranged in the driving groove 402 , and the driving rod 11 is connected to the push rod 8 .

[0057] A plurality of balls 601 are slidably disposed in the driving block 6 . The diameter of the balls 601 is larger than the slot opening of the driving block 6 . The balls 601 close to one end of the driving block 6 are in push contact with the push rod 8 .

[0058] A driving slider 501 is fixedly connected to the bottom of the windshield plate 5 , and the driving slider 501 is disposed in the driving block 6 and pushes against a ball 601 close to the other end of the driving block 6 .

[0059] As the present embodiment, when the wind blows the wind shield plate 5 to move, the driving slider 501 at the bottom of the wind shield plate 5 slides to the other side in the driving block 6. While sliding, the driving slider 501 contacts the ball 601 and then pushes the ball 601 to move. There are several balls 601 and they move linearly. Therefore, when the ball 601 is driven by the driving slider 501, the ball 601 farthest from the driving slider 501 pushes the push rod 8 to move out of the driving block 6, so that the push rod 8 drives the driving rod 11 to slide in the driving groove 402 at the bottom of the heat dissipation fin 4. When the driving rod 11 slides to one end of the driving groove 402, it drives the heat dissipation fin 4 to rotate in the same direction, thereby generating an inclined surface. The generated inclined surface ensures that the natural wind blowing from the side can fully contact the side of the transformer body 1 and the heat dissipation fin 4. Compared with the traditional fixed thin-film heat sink, the wind resistance is small and the heat exchange efficiency is higher, thereby greatly improving the heat dissipation efficiency of the transformer body 1.

[0060] As an implementation method, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the outer walls of the top and bottom of the spindle block 9 are fixedly connected with connecting rods 10, and the connecting rods 10 are fixedly connected to the oil injection plate 2 so that the oil injection plate 2 and the spindle block 9 can rotate synchronously.

[0061] A limit slide groove is provided on the movable plate 7, and a limit slider fixedly connected to the side wall of the wind shield plate 5 is slidably arranged in the limit slide groove.

[0062] As the present embodiment, while the wind shield plate 5 slides on the driving block 6 through the driving slider 501, its side wall slides in the limiting slide groove through the limiting slider. After the heat dissipation fin 4 is deformed into a windward inclined surface, the sliding distance of the wind shield plate 5 is limited by the limiting slide groove. Subsequently, when the wind shield plate 5 is subjected to up and down wind, it is caused to rotate upward or downward through the movable plate 7 with the main shaft block 9 as the axis due to the limited sliding and the flow direction of the wind. While rotating, the oil filling plate 2 is connected to the upper and lower outer walls of the main shaft block 9 through the connecting rod 10, so that the main shaft block 9 can synchronously drive the oil filling plate 2 to rotate. After the oil filling plate 2 and the wind shield plate 5 are rotated through the main shaft block 9, the heat dissipation fins 4 between the oil filling plate 2 form an inclination angle from top to bottom or from bottom to top on the basis of the original windward inclined surface, thereby ensuring that the natural wind blowing from top and bottom can fully contact the side of the transformer body 1 and the heat dissipation fins 4.

[0063] As an implementation method, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the wind shield 5 is specifically "L"-shaped so that the wind shield 5 can bear natural wind forces from different directions.

[0064] As this embodiment, the specific shape of the wind shield 5 is an "L" shape, wherein the longer end is used to receive the natural wind force blowing from the side, and the shorter end is used to receive the natural wind force blowing from the top and bottom.

[0065] As an implementation method, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the oil filling pipe 3 is specifically a soft rubber pipe, and the oil filling pipe 3, the oil tank, the oil filling shaft 401 and the heat dissipation fins 4 form a closed oil circuit.

[0066] As this embodiment, the oil filling pipe 3 is provided by a soft rubber tube. When the oil filling plate 2 rotates, the oil circulation will not be affected by the rotation of the oil filling plate 2 because it has adaptive deformation ability. The oil enters the transformer body 1 from the oil tank, and then the oil is injected into the oil filling shaft 401 through the oil filling pipe 3, and then injected into the oil cavity in the heat sink fin 4 through the oil filling shaft 401 to form oil heat conversion, and then re-enters the oil filling pipe 3 from the oil cavity of the heat sink fin 4 and through the oil filling shaft 401 at the bottom, and finally re-enters the transformer body 1 through the oil filling pipe 3 to form a complete closed oil circuit.

[0067] Specifically, when the transformer body 1 is blown by the lateral wind, the wind blows toward the windshield plates 5 arranged on both sides of the transformer body 1. The windshield plates 5 are pushed by the wind, driving the driving slider 501 at the bottom of the windshield plates 5 to slide to the other side in the driving block 6. While sliding, the driving slider 501 contacts the ball 601, and then pushes the ball 601 to move. There are a plurality of ball 601s, and they move linearly, so that when the ball 601 is driven by the driving slider 501, the ball 601 farthest from the driving slider 501 pushes the push rod 8 to move out of the driving block 6, so that The push rod 8 drives the driving rod 11 to slide in the driving groove 402 at the bottom of the heat dissipation fin 4. When the driving rod 11 slides to one end of the driving groove 402, it drives the heat dissipation fin 4 to rotate in the same direction, thereby generating an inclined surface. The generated inclined surface ensures that the natural wind blowing from the side can fully contact the side of the transformer body 1 and the heat dissipation fin 4. When the windshield 5 slides on the driving block 6 through the driving slider 501, its side wall slides in the limiting slide groove through the limiting slider. After the heat dissipation fin 4 is deformed into a windward inclined surface, the sliding distance of the windshield 5 is limited by the limiting slide groove.

[0068] Subsequently, when the wind shield plate 5 is blown by the up and down wind, due to its limited sliding and the flow direction of the up and down wind, it rotates upward or downward with the main shaft block 9 as the axis through the movable plate 7. While rotating, the oil filling plate 2 is connected to the upper and lower outer walls of the main shaft block 9 through the connecting rod 10, so that the main shaft block 9 can synchronously drive the oil filling plate 2 to rotate. After the oil filling plate 2 and the wind shield plate 5 rotate through the main shaft block 9, the heat dissipating fins 4 between the oil filling plates 2 form an inclination angle from top to bottom or from bottom to top on the basis of the original windward slope, thereby ensuring that the natural wind blowing from top and bottom can fully contact the side of the transformer body 1 and the heat dissipating fins 4, and the heat dissipating fins 4 that are constantly affected by the wind force changing angle can better prevent birds and small animals from entering the fin gap to build nests.

[0069] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0070] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A suspended transformer, comprising a transformer body (1), an oil tank fixedly arranged on one side of the top of the transformer body (1), and a heat dissipation structure arranged on the outer wall of the transformer body (1) and capable of adjusting the angle according to the wind direction, characterized in that: The heat dissipation structure further comprises: an oil filling plate (2) connected to the oil inside the transformer body (1) through an oil filling pipe (3), and the oil filling plates (2) are two and symmetrically distributed on the outer walls of the front and back sides of the transformer body (1); A heat dissipation fin (4) is rotatably arranged between the oil injection plates (2) and can adjust the angle according to the wind direction, and the top and bottom of the heat dissipation fin (4) are connected to the oil injection plate (2) through the oil injection rotating shaft (401); A driving component for driving the heat dissipation structure to adjust the heat dissipation angle according to the wind direction; The drive assembly comprises: Wind shields (5) slidably arranged on both sides of the transformer body (1); A driving block (6) arranged at the bottom of the windshield (5) for sliding the windshield (5) and a push rod (8) slidably arranged in the driving block (6) for driving the heat dissipation fins (4) to rotate at an angle; A frame assembly for driving the heat dissipation structure to rotate and adjust; The frame assembly comprises: Rotating a main shaft block (9) arranged on the outer wall of the transformer body (1); A movable plate (7) is fixedly connected to the outer walls on both sides of the main shaft block (9) so as to allow the wind shield plate (5) to drive the main shaft block (9) to rotate.

2. A suspension transformer according to claim 1, characterized in that: A driving groove (402) is provided at the bottom of the heat dissipation fin (4), and a driving rod (11) is slidably arranged in the driving groove (402), and the driving rod (11) is connected to the push rod (8).

3. A suspension transformer according to claim 1, characterized in that: A plurality of balls (601) are slidably arranged in the driving block (6), the diameter of the balls (601) being larger than the slot opening of the driving block (6), and the balls (601) close to one end of the driving block (6) are in push contact with the push rod (8).

4. A suspension transformer according to claim 1, characterized in that: A driving slider (501) is fixedly connected to the bottom of the windshield plate (5), and the driving slider (501) is arranged in the driving block (6) and pushes against a ball (601) close to the other end of the driving block (6).

5. The suspension transformer according to claim 1, characterized in that: The outer walls of the top and bottom of the spindle block (9) are fixedly connected with connecting rods (10), and the connecting rods (10) are fixedly connected to the oil injection plate (2) so that the oil injection plate (2) and the spindle block (9) rotate synchronously.

6. The suspension transformer according to claim 1, characterized in that: The movable plate (7) is provided with a limit sliding groove, and a limit sliding block fixedly connected to the side wall of the wind shield plate (5) is slidably arranged in the limit sliding groove.

7. A suspension transformer according to claim 6, characterized in that: The wind shield (5) is specifically in an "L" shape so that the wind shield (5) can receive natural wind forces from different directions.

8. The suspension transformer according to claim 1, characterized in that: The oil filling pipe (3) is specifically a soft rubber pipe, and the oil filling pipe (3), the oil tank, the oil filling shaft (401) and the heat dissipation fins (4) form a closed oil circuit.

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