Tractor heat dissipation sealing mechanism

Abstract

The utility model relates to a tractor heat dissipation sealing mechanism, and belongs to the field of tractor heat dissipation. Comprising a sealing upper plate, two sealing side plates, a sealing lower plate, a sealing sponge and a sealing strip, the sealing upper plate and the sealing lower plate are arranged at the top end and the bottom end of the tractor radiator respectively, and the two sealing side plates are symmetrically arranged on the left side and the right side of the tractor radiator respectively. The side, corresponding to the inner wall of the tractor hood, of the upper sealing plate and the side, corresponding to the inner wall of the tractor hood, of the side sealing plate are both matched with the inner wall outline of the tractor hood, the upper sealing plate is connected with a tractor radiator, the side sealing plate is connected with the inner wall of the tractor hood, and the lower sealing plate is connected with a tractor chassis. The sealing sponge is detachably installed on the sealing lower plate, and the sealing strip is installed in a gap between the sealing upper plate and the inner wall of the tractor hood and between the sealing side plate and the inner wall of the tractor hood. According to the utility model, sucked air can be ensured to flow through the radiator to the greatest extent instead of overflowing from a gap between the radiator and the interior of the hood.

Description

Technical Field

[0001] The utility model relates to the field of tractor heat dissipation, in particular to a tractor heat dissipation sealing mechanism. Background Art

[0002] When the tractor is working, the system will generate heat, such as the engine, hydraulic oil circuit, exhaust pipe and other components. In order to ensure that the temperature of the tractor's water circuit, oil circuit and other key systems is maintained in the optimal range, it is necessary to dissipate heat.

[0003] The heat dissipation of the tractor is mainly carried out through the radiator. The principle is that the engine drives the fan behind the radiator to rotate, forming suction, sucking the normal temperature air in front of the radiator into the radiator. After passing through the radiator, the normal temperature air will take away most of the heat to achieve the purpose of heat dissipation. Since the engine and radiator are generally arranged inside the hood, if the seal between the hood and the radiator is not tight, the sucked normal temperature air will flow out from the gap, resulting in the air not being able to flow through the radiator completely, which will lead to incomplete heat dissipation, affecting the performance of the tractor and even damaging the engine.

[0004] Traditional tractor heat dissipation seals mainly seal the two sides of the radiator, and do not seal the top and bottom, which cannot maximize the heat dissipation performance of the tractor when it is working. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a tractor heat dissipation sealing mechanism to solve the above-mentioned problem.

[0006] The utility model solves the above technical problems with the following technical solutions: a tractor heat dissipation sealing mechanism, comprising: a sealing upper plate, two sealing side plates, a sealing lower plate, a sealing sponge and a sealing strip; the sealing upper plate and the sealing lower plate are respectively arranged at the top and bottom ends of the tractor radiator, the two sealing side plates are respectively symmetrically arranged at the left and right sides of the tractor radiator, the side of the sealing upper plate corresponding to the inner wall of the tractor hood and the side of the sealing side plate corresponding to the inner wall of the tractor hood are both adapted to the inner wall contour of the tractor hood, the sealing upper plate is connected to the tractor radiator, the sealing side plates are connected to the inner wall of the tractor hood, the sealing lower plate is connected to the tractor chassis, the sealing sponge is detachably mounted on the sealing lower plate, and the sealing strip is mounted at the gap between the sealing upper plate and the sealing side plates and the inner wall of the tractor hood.

[0007] The beneficial effects of the present utility model are as follows: Through the sealing upper plate, two sealing side plates, the sealing lower plate, the sealing sponge and the sealing strip, it is beneficial to isolate and block the front and rear of the radiator as much as possible, and can ensure to the greatest extent that the inhaled air flows through the radiator instead of overflowing from the gap between the radiator and the inside of the engine hood. In particular, the upper and lower parts of the radiator are also sealed, solving the problem of insufficient performance of the tractor caused by incomplete heat dissipation in the prior art. Moreover, the sealing mechanism has a simple structure, is easy to manufacture and has a low cost, and has high reliability. Connecting it to the inner wall of the engine hood or the radiator makes the whole mechanism have high rigidity and avoids generating noise due to vibration during work.

[0008] On the basis of the above technical solution, the present utility model can be further improved as follows.

[0009] Further, sealing upper plate mounting plates are arranged on both sides of the sealing upper plate. The sealing upper plate mounting plates are perpendicularly connected to the sealing upper plate, and the sealing upper plate mounting plates are installed on the tractor radiator through bolts.

[0010] The beneficial effect of adopting the above further solution is that the perpendicular connection between the sealing upper plate mounting plate and the sealing upper plate is beneficial to tightening the bolts from the side when installing the sealing upper plate, which can avoid the interference generated when tightening the bolts in the front and rear directions and greatly improve the assembly efficiency.

[0011] Further, pipe through-holes are also arranged on both sides of the sealing upper plate. The pipe through-holes are inverted U-shaped through-holes.

[0012] The beneficial effect of adopting the above further solution is that setting the pipe through-holes as inverted U-shaped through-holes is beneficial to installing the pipeline. When installing the pipeline, it is not necessary to adjust the pipeline to pass through the sealing upper plate. Only after installing the pipeline, then lower the sealing upper plate from top to bottom and tighten it with bolts from both sides, which improves the production efficiency and is convenient for future maintenance.

[0013] Further, an avoidance hole and a fixing plate are also arranged on the sealing upper plate. The avoidance hole is a through-hole and is adapted to the tractor water tank. The fixing plate is arranged above the avoidance hole and is perpendicularly installed on the sealing upper plate. The tractor electronic control unit is installed on the fixing plate.

[0014] The beneficial effect of adopting the above further solution is that the adaptation of the avoidance hole to the tractor water tank is beneficial to avoiding the structure of the water tank, and the fixing plate is beneficial to installing the tractor electronic control unit.

[0015] Further, a plurality of engine hood reinforcing rib avoidance openings are arranged on the side of the sealing side plate close to the inner wall of the tractor engine hood. The engine hood reinforcing rib avoidance openings are through-holes adapted to the reinforcing ribs on the inner wall of the tractor engine hood.

[0016] The beneficial effects of adopting the above further solution are as follows: The avoidance opening of the hood reinforcing rib is beneficial for the sealing side plate to follow the shape of the hood reinforcing rib for avoidance, so as to ensure the sealing performance.

[0017] Further, a sealing side plate mounting plate is provided at the top of the sealing side plate. The sealing side plate mounting plate is perpendicularly connected to the sealing side plate, and the sealing side plate mounting plate is mounted on the inner wall of the tractor hood by bolts.

[0018] The beneficial effects of adopting the above further solution are as follows: The sealing side plate mounting plate is beneficial for mounting and fixing the sealing side plate on the inner wall of the tractor hood, improving the rigidity and stability of the entire sealing mechanism.

[0019] Further, the sealing lower plate is a right-angled plate-shaped structure. A plurality of sealing lower plate mounting holes are provided on the horizontal surface of the sealing lower plate, and the sealing lower plate is fixed on the tractor chassis by bolts.

[0020] The beneficial effects of adopting the above further solution are as follows: It is beneficial for mounting and fixing the sealing lower plate on the tractor chassis, improving the rigidity and stability of the entire sealing mechanism, and at the same time providing support for the sealing sponge. When used in combination with the sealing sponge, it maximally ensures that there will be no excessive gap on the lower side of the radiator, increasing the sealing performance.

[0021] Further, the sealing sponge is a "convex"-shaped structure composed of a first sealing sponge strip and a second sealing sponge strip, and the second sealing sponge strip is arranged on the first sealing sponge strip.

[0022] The beneficial effects of adopting the above further solution are as follows: The sealing sponge is beneficial for filling the gap formed between the metal lower plate and the radiator to avoid interference during assembly according to its own characteristics of being easily compressed and deformed.

[0023] Further, the first sealing sponge strip is arranged at the gap between the sealing lower plate and the tractor radiator, and the second sealing sponge strip is arranged at the through hole on the tractor radiator for the tractor front PTO shaft to pass through.

[0024] The beneficial effects of adopting the above further solution are as follows: Since the sealing lower plate is a metal part, in order to avoid interference during assembly, there will inevitably be an installation gap between the sealing lower plate and the radiator. Due to the characteristics of the first sealing sponge strip being easily compressed and deformed, it can well fill the gap; due to the existence of the front PTO shaft in some tractors, there will be a passing space for the PTO shaft under the radiator. However, since the PTO shaft is an optional configuration, when the user does not select the front PTO, there will be a gap under the radiator. The protruding second sealing sponge strip can fill and seal the passing space, ensuring the sealing performance of the radiator.

[0025] Furthermore, the sealing strip is an integrated structure with an outer rubber layer wrapping an inner steel strip, and a flat groove is provided in the middle of the inner steel strip.

[0026] The beneficial effects of adopting the above further solution are as follows: Since the engine hood, the upper sealing plate, and the side sealing plates are all made of metal, in order to avoid air overflow caused by gaps, the sealing strip, due to its own rubber characteristics, fully fills the exposed gaps, ensuring the reliability of the seal. In addition, the traditional sealing strip is segmented, while the sealing strip in the present utility model is an integral one-piece type, which can be installed around the radiator through the flat groove to form an inverted U-shaped seal, effectively sealing not only the two sides of the radiator but also its upper part, improving the overall sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present utility model installed on the radiator Figure 1 ;

[0028] Figure 2 Schematic diagram of the overall structure provided by the embodiment of the present utility model installed on the radiator Figure 2 ;

[0029] Figure 3 Schematic diagram of the overall structure provided by the embodiment of the present utility model Figure 1 ;

[0030] Figure 4 Schematic diagram of the overall structure provided by the embodiment of the present utility model Figure 2 ;

[0031] Figure 5 Schematic diagram of the structure of the upper sealing plate provided by the embodiment of the present utility model;

[0032] Figure 6 Schematic diagram of the structure of the side sealing plate provided by the embodiment of the present utility model;

[0033] Figure 7 Schematic diagram of the structure of the lower sealing plate provided by the embodiment of the present utility model;

[0034] Figure 8 Schematic diagram of the structure of the sealing sponge provided by the embodiment of the present utility model;

[0035] Figure 9 Schematic diagram of the structure of the sealing strip provided by the embodiment of the present utility model;

[0036] Figure 10 Transverse cross-sectional view of the sealing strip provided by the embodiment of the present utility model.

[0037] In the drawings, the list of components represented by each reference numeral is as follows:

[0038] 1. Sealing upper plate; 2. Sealing side plate; 3. Sealing lower plate; 4. Sealing sponge; 5. Sealing strip; 11. Sealing upper plate mounting plate; 12. Pipe through hole; 13. Avoidance hole; 14. Fixed plate; 21. Hood stiffener avoidance opening; 22. Sealing side plate mounting plate; 31. Sealing lower plate mounting hole; 41. First sealing sponge strip; 42. Second sealing sponge strip; 51. Flat groove. Detailed implementation mode

[0039] The principles and features of the present utility model will be described below. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0040] As Figures 1 to 4 shown, a tractor heat dissipation sealing mechanism includes: a sealing upper plate 1, two sealing side plates 2, a sealing lower plate 3, a sealing sponge 4 and a sealing strip 5; the sealing upper plate 1 and the sealing lower plate 3 are respectively arranged at the top and bottom of the tractor radiator, the two sealing side plates 2 are symmetrically arranged on the left and right sides of the tractor radiator respectively, the side of the sealing upper plate 1 corresponding to the inner wall of the tractor hood and the side of the sealing side plate 2 corresponding to the inner wall of the tractor hood are both adapted to the inner wall contour of the tractor hood, the sealing upper plate 1 is connected to the tractor radiator, the sealing side plate 2 is connected to the inner wall of the tractor hood, the sealing lower plate 3 is connected to the tractor chassis, the sealing sponge 4 is detachably installed on the sealing lower plate 3, and the sealing strip 5 is installed at the gap between the sealing upper plate 1 and the sealing side plate 2 and the inner wall of the tractor hood.

[0041] The beneficial effects of the present utility model are: through the sealing upper plate, two sealing side plates, a sealing lower plate, a sealing sponge and a sealing strip, it is beneficial to isolate and block the front and rear of the radiator as much as possible, and can ensure to the greatest extent that the inhaled air flows through the radiator rather than overflowing from the gap between the radiator and the inner part of the hood. Especially, the upper and lower parts of the radiator are also sealed, which solves the problem of insufficient tractor performance caused by incomplete heat dissipation in the prior art. And this sealing mechanism has a simple structure, is easy to manufacture and has a low cost, has high reliability, and is connected to the inner wall of the hood or the radiator, making the whole mechanism have high rigidity and avoiding noise generated by vibration during work.

[0042] Preferably, as Figure 5 shown, both sides of the sealing upper plate 1 are provided with sealing upper plate mounting plates 11, the sealing upper plate mounting plates 11 are vertically connected to the sealing upper plate 1, and the sealing upper plate mounting plates 11 are installed on the tractor radiator by bolts.

[0043] The beneficial effects of adopting the above preferred solution are as follows: The perpendicular connection between the sealing upper plate mounting plate and the sealing upper plate is beneficial for tightening the bolts from the side when installing the sealing upper plate, which can avoid interference generated when tightening the bolts in the front-back direction and greatly improve the assembly efficiency.

[0044] Preferably, as Figure 5 shown, pipe through-holes 12 are further provided on both sides of the sealing upper plate 1, and the pipe through-holes 12 are inverted U-shaped through-holes.

[0045] The beneficial effects of adopting the above preferred solution are as follows: Setting the pipe through-holes as inverted U-shaped through-holes is beneficial for installing the pipeline. When installing the pipeline, it is not necessary to adjust the pipeline to pass through the sealing upper plate. After the pipeline is installed, only need to lower the sealing upper plate from top to bottom, and then tighten it with bolts from both sides, which improves the production efficiency and is convenient for future maintenance.

[0046] Preferably, as Figure 5 shown, an avoidance hole 13 and a fixing plate 14 are further provided on the sealing upper plate 1. The avoidance hole 13 is a through-hole and is adapted to the tractor water tank. The fixing plate 14 is arranged above the avoidance hole 13 and is vertically installed on the sealing upper plate 1. The tractor electronic control unit is installed on the fixing plate 14.

[0047] The beneficial effects of adopting the above preferred solution are as follows: The adaptation of the avoidance hole to the tractor water tank is beneficial for avoiding the structure of the water tank, and the fixing plate is beneficial for installing the tractor electronic control unit.

[0048] Preferably, as Figure 6 shown, a plurality of hood reinforcing rib avoidance openings 21 are provided on the side of the sealing side plate 2 close to the inner wall of the tractor hood. The hood reinforcing rib avoidance openings 21 are through-holes adapted to the reinforcing ribs on the inner wall of the tractor hood.

[0049] The beneficial effects of adopting the above preferred solution are as follows: The hood reinforcing rib avoidance openings are beneficial for the sealing side plate to follow the shape of the hood reinforcing ribs to avoid, so as to ensure the sealing performance.

[0050] Preferably, as Figure 6 shown, a sealing side plate mounting plate 22 is provided at the top of the sealing side plate 2. The sealing side plate mounting plate 22 is perpendicularly connected to the sealing side plate 2, and the sealing side plate mounting plate 22 is installed on the inner wall of the tractor hood through bolts.

[0051] The beneficial effects of adopting the above preferred solution are as follows: The sealing side plate mounting plate is beneficial for installing and fixing the sealing side plate on the inner wall of the tractor hood, and improving the rigidity and stability of the entire sealing mechanism.

[0052] Preferably, as Figure 7As shown, the sealing lower plate 3 is a right-angled plate-like structure. A plurality of sealing lower plate mounting holes 31 are provided on the horizontal plane of the sealing lower plate 3, and the sealing lower plate 3 is fixed to the tractor chassis by bolts.

[0053] The beneficial effects of adopting the above preferred solution are as follows: It is beneficial to install and fix the sealing lower plate on the tractor chassis, improve the rigidity and stability of the entire sealing mechanism, and at the same time provide support for the sealing sponge. When used in combination with the sealing sponge, it can ensure to the greatest extent that there will be no excessive gap on the lower side of the radiator, increasing the sealing performance.

[0054] Preferably, as Figure 8 shown, the sealing sponge 4 is a "convex"-shaped structure composed of a first sealing sponge strip 41 and a second sealing sponge strip 42, and the second sealing sponge strip 42 is arranged on the first sealing sponge strip 41.

[0055] The beneficial effects of adopting the above preferred solution are as follows: The sealing sponge is beneficial to fill the gap formed between the metal lower plate and the radiator to ensure that there is no interference during assembly according to its own characteristics of being easily compressed and deformed.

[0056] Preferably, the first sealing sponge strip 41 is arranged at the gap between the sealing lower plate 3 and the tractor radiator, and the second sealing sponge strip 42 is arranged at the through hole on the tractor radiator for the tractor front PTO shaft to pass through.

[0057] The beneficial effects of adopting the above preferred solution are as follows: Since the sealing lower plate is a metal part, in order to ensure that there is no interference during assembly, there will inevitably be an installation gap between the sealing lower plate and the radiator. Due to the characteristics of the first sealing sponge strip being easily compressed and deformed, it can well fill the gap; for some tractors, due to the existence of the front PTO shaft, there will be a passing space for the PTO shaft below the radiator. However, since the PTO shaft is an optional configuration, when the user does not select the front PTO, there will be a gap below the radiator. The protruding second sealing sponge strip can fill and seal the passing space to ensure the sealing performance of the radiator.

[0058] Preferably, as Figure 9 and Figure 10 shown, the sealing strip 5 is an integrated structure with an external rubber wrapping an internal steel strip, and a flat groove 51 is provided in the middle of the internal steel strip.

[0059] The beneficial effects of adopting the above preferred solution are as follows: Since the hood, the sealing upper plate, and the sealing side plates are all made of metal, in order to avoid air overflow caused by gaps, the sealing strip, due to its own rubber characteristics, fully fills the exposed gaps, ensuring the reliability of the seal. In addition, the traditional sealing strip is segmented, while the sealing strip in the present utility model is integrally integrated and can be installed around the radiator through a flat groove to form an inverted U-shaped seal, effectively sealing not only the two sides of the radiator but also its upper part, improving the overall sealing performance.

[0060] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0062] In the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "join", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0063] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0064] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0065] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A heat dissipation sealing mechanism for a tractor, characterized in that, Including: A sealed upper plate (1), two sealed side plates (2), a sealed lower plate (3), a sealed sponge (4) and a sealing strip (5); the sealed upper plate (1) and the sealed lower plate (3) are respectively arranged at the top and bottom of the tractor radiator, the two sealed side plates (2) are symmetrically arranged on the left and right sides of the tractor radiator respectively, the side of the sealed upper plate (1) corresponding to the inner wall of the tractor hood and the side of the sealed side plate (2) corresponding to the inner wall of the tractor hood are both adapted to the inner wall contour of the tractor hood, the sealed upper plate (1) is connected to the tractor radiator, the sealed side plate (2) is connected to the inner wall of the tractor hood, the sealed lower plate (3) is connected to the tractor chassis, the sealed sponge (4) is detachably installed on the sealed lower plate (3), and the sealing strip (5) is installed at the gap between the sealed upper plate (1) and the sealed side plate (2) and the inner wall of the tractor hood.

2. The heat dissipation sealing mechanism of a tractor according to claim 1, characterized in that Sealed upper plate mounting plates (11) are arranged on both sides of the sealed upper plate (1), the sealed upper plate mounting plates (11) are vertically connected to the sealed upper plate (1), and the sealed upper plate mounting plates (11) are installed on the tractor radiator by bolts.

3. The heat dissipation sealing mechanism of a tractor according to claim 1, characterized in that, Pipe through holes (12) are also arranged on both sides of the sealed upper plate (1), and the pipe through holes (12) are inverted U-shaped through holes.

4. The heat dissipation sealing mechanism of a tractor according to claim 1, characterized in that, An avoidance hole (13) and a fixing plate (14) are also arranged on the sealed upper plate (1), the avoidance hole (13) is a through hole and is adapted to the tractor water tank, the fixing plate (14) is arranged above the avoidance hole (13) and is vertically installed on the sealed upper plate (1), and the tractor electronic control unit is installed on the fixing plate (14).

5. The heat dissipation sealing mechanism of a tractor according to claim 1, characterized in that, A plurality of hood reinforcing rib avoidance openings (21) are arranged on the side of the sealed side plate (2) close to the inner wall of the tractor hood, and the hood reinforcing rib avoidance openings (21) are through holes adapted to the reinforcing ribs on the inner wall of the tractor hood.

6. The radiator sealing mechanism of a tractor according to claim 1, characterized in that, A sealed side plate mounting plate (22) is arranged at the top of the sealed side plate (2), the sealed side plate mounting plate (22) is vertically connected to the sealed side plate (2), and the sealed side plate mounting plate (22) is installed on the inner wall of the tractor hood by bolts.

7. The heat dissipation sealing mechanism of a tractor according to claim 1, wherein, The sealed lower plate (3) is in a right-angled plate-like structure, a plurality of sealed lower plate mounting holes (31) are arranged on the horizontal plane of the sealed lower plate (3), and the sealed lower plate (3) is fixed on the tractor chassis by bolts.

8. The heat dissipation sealing mechanism of a tractor according to claim 1, characterized in that, The sealed sponge (4) is in a "convex" shape structure composed of a first sealed sponge strip (41) and a second sealed sponge strip (42), and the second sealed sponge strip (42) is arranged on the first sealed sponge strip (41).

9. The heat dissipation sealing mechanism of a tractor according to claim 8, characterized in that, The first sealed sponge strip (41) is arranged at the gap between the sealed lower plate (3) and the tractor radiator, and the second sealed sponge strip (42) is arranged at the through hole on the tractor radiator for the tractor front PTO shaft to pass through.

10. The tractor heat dissipation sealing mechanism according to claim 1, wherein, The sealing strip (5) is an integrated structure with an external rubber wrapping an internal steel strip, and a flat groove (51) is arranged in the middle of the internal steel strip.

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