Mechanism for field reducer immobilization and method for immobilization thereof

Abstract

The application relates to a mechanism for field decelerator storage and a storage method thereof, which comprises a cross beam frame I fixedly installed at a certain height from the ground in a warehouse, a plurality of bottomless box bodies are arranged on the cross beam frame I at intervals, a box bottom plate can place a decelerator, a lifting frame II has a bearing plate and a lifting mechanism, the lifting mechanism can lift the bearing plate and the decelerator and then buckle the bearing plate and the decelerator with the bottomless box body, a ring of sealing air bags is arranged at the buckling position of the box bottom plate and the edge of the bottomless box body, and a ring of soft magnets capable of magnetization and demagnetization is arranged in the cavity of the sealing air bags. The application has the advantages of adjustable sealing position, good sealing effect, increased storage time of the decelerator and the like.

Description

Technical Field

[0001] This invention relates to the field of aviation material storage technology, and in particular to a mechanism and method for storing field speed reducers. Background Technology

[0002] The term "field gearbox" here refers to gearboxes that need to be disassembled. Regular gearboxes can be stored in the warehouse after cleaning, rust removal, touch-up painting, and external oil sealing. However, gearboxes used in aviation (such as helicopter tail engines) require an aluminum-plastic film enclosure before storage.

[0003] The inventors discovered that, although a certain type of helicopter engine was stored in a dry warehouse, the engine parts near the ground were more susceptible to corrosion; however, placing the engine at a certain height above the ground reduced corrosion. It is speculated that the closer to the ground, the more easily it absorbs moisture. Inspired by this, tests were conducted on the gearbox, and the same problem was found. Currently, the specific cause of this issue in the aircraft parts is not yet clear, but it is certain that being further away from the ground increases storage time.

[0004] Based on this, a special storage mechanism and a special sealing method were designed for the gearbox in aviation materials. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mechanism and method for sealing off field speed reducers.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] (First aspect) A mechanism for sealing off a field speed reducer, comprising:

[0008] Crossbeam frame I is fixedly installed at a certain height above the ground in the warehouse, and multiple bottomless boxes are set on it at intervals.

[0009] The bottom plate of the box can slide on the ground, and a speed reducer can be placed on it;

[0010] Lifting frame II, which can slide on the ground, has a support plate and a lifting mechanism; the lifting mechanism can lift the support plate from the ground to a certain height;

[0011] After the reducer is placed on the bottom plate of the box, it slides along the ground to the bottom of the corresponding bottomless box. Then, the lifting frame II lifts the bottom plate and the reducer upward through the lifting mechanism and the bearing plate, and the bottom plate is fastened and fixedly connected with the bottomless box to form a whole box, so that the reducer is sealed in the whole box with the ground off the ground.

[0012] The edge of the bottom plate is buckled with the edge of the bottomless box body, and a ring of sealing air bag is arranged at the buckling position; a ring of soft magnet is arranged in the cavity of the sealing air bag along the sealing air bag, and a coil is arranged in the rubber layer of the sealing air bag.

[0013] When the coil is charged with direct current, the soft magnet is magnetized, the soft magnet is adsorbed at the corresponding buckling surface of the bottomless box body, the soft magnet applies pressure to the sealing air bag, and sealing is realized; when the coil is charged with alternating current with variable size, the soft magnet is demagnetized, and the bottom plate can be removed from the bottomless box body.

[0014] As a preferred technical solution of the present application, the circumferential edge of the bottom plate is in a certain slope shape, that is, a conical structure with small top and large bottom is formed; the circumferential edge of the lower edge of the bottomless box body is in an expanding shape with small top and large bottom; the conical surface of the circumferential edge of the bottom plate is matched with the expanding surface at the lower edge of the bottomless box body; and the sealing air bag is arranged at the conical surface of the bottom plate.

[0015] As a preferred technical solution of the present application, the sealing air bag has two rubber layers; a coil is arranged between the two rubber layers, a soft magnet is arranged in the cavity of the innermost rubber layer, and the soft magnet is also arranged along the edge of the bottomless box body; and the coil is equivalent to being arranged on the soft magnet.

[0016] As a preferred technical solution of the present application, the sealing air bag also has a rubber bottom support which is integrated with the outer rubber layer; a ring-shaped groove is formed in the circumferential edge of the bottom plate, and the rubber bottom support is adhered and fixed in the ring-shaped groove by glue.

[0017] As a preferred technical solution of the present application, the lifting frame II comprises two oppositely arranged column frames; a bearing plate is arranged on the ground between the two column frames; the column frame is fixed on a base plate, a winch is arranged on the base plate, and a fixed pulley is arranged at the top of the column frame; the winches on the two base plates are connected to one side of the bearing plate through lifting belts passing through the corresponding fixed pulleys; the bottom surface of the base plate is provided with corresponding rollers, and a driving wheel and a corresponding driving motor are further arranged on the base plate.

[0018] As a preferred technical solution of the present application, the bottomless box body is provided with a fixing lug; the bottom plate comprises a bottom plate part and a supporting part which are fixed in sequence and integrated; the bottom plate part is buckled with the bottomless box body, and the supporting part is provided with a rectangular slot hole in the left-right direction; when the bottom plate is buckled with the bottomless box body, a rectangular prism is arranged in the rectangular slot hole and the fixing lug, so as to realize the fixed installation of the bottom plate and the bottomless box body.

[0019] As the preferred technical scheme of the present application, the bottomless box is installed on the beam frame I through the telescopic cylinder, and a pull rod is arranged between the bottomless box and the beam frame I, and a limiting nut is arranged on the top of the pull rod; when the bottom plate is lifted and the bottomless box is lowered, the two are buckled; when the bottom plate and the bottomless box are fixed together, the two are moved downward together, and the two are hung on the beam frame I through the pull rod and the limiting nut.

[0020] As the preferred technical scheme of the present application, the guiding groove is arranged on the ground of the warehouse, and the rollers of the bottom plate and the lifting frame II slide along the guiding groove.

[0021] As the preferred technical scheme of the present application, the bottomless box is further provided with a gas nozzle A connected with the nitrogen charging mechanism and a gas nozzle B for exhausting; the bottomless box is provided with a gas pressure monitor and a humidity detector, the nitrogen charging mechanism, the electromagnetic valve at the gas nozzle B, the gas pressure monitor and the humidity detector are electrically connected with a control panel, and the control panel is arranged on the control cabinet of the warehouse room.

[0022] On the other hand, a sealing method for the sealing mechanism of the field reducer, the sealing step is:

[0023] S1, in the factory building which is not the warehouse room, the reducer is cleaned, rusted, oiled and packaged, and then the reducer is hung on the bottom plate;

[0024] S2, in the warehouse room, the lifting frame II is pushed along the guiding groove on the ground to the position directly below the blank bottomless box;

[0025] The bottom plate loaded with the reducer is pushed into the warehouse room, and the bottom plate is pushed along the guiding groove to the bearing plate on the lifting frame II;

[0026] S3, the winch on the lifting frame II works to exert a lifting force from both sides of the bearing plate, so that the bottom plate and the reducer are lifted and preliminarily buckled with the bottomless box;

[0027] Then the bottomless box is driven by the telescopic cylinder to act downward on the bottomless box to buckle again;

[0028] Then, the rectangular prism is inserted into the fixing ear of the bottomless box and the rectangular slot hole of the bottom plate, so that the bottomless box and the bottom plate are fixed together; at this time, the sealing air bag preliminarily contacts the buckling surface of the bottomless box;

[0029] S4, direct current is supplied to the coil to magnetize the soft magnet; the soft magnet is closer to the buckling surface of the bottomless box than to the buckling surface of the bottom plate, so that the soft magnet is adsorbed on the buckling surface of the bottomless box;

[0030] The soft magnet presses the sealing air bag on the buckling surface of the bottomless box to realize sealing;

[0031] S5, then the carrier plate falls back, and at the same time the telescopic cylinder also extends to let the bottomless box body fall back together with the reducer and the box bottom plate, so that the bottomless box body is hung on the beam frame I through the pull rod;

[0032] Then the carrier plate continues to fall and separates from the box bottom plate;

[0033] S6, then the lifting frame II continues to slide along the guide groove to the bottom of another blank bottomless box body, and the above-mentioned action is repeated to store another reducer.

[0034] The present application has the following advantages:

[0035] (1) improve the sealing effect;

[0036] By storing the reducer away from the ground, the sealing effect can be improved, that is, the lower part of the reducer can be prevented from being corroded, thereby prolonging the storage time (the specific reason for the corrosion of the lower part of the reducer is to be verified, which may be the moisture in the box due to the temperature change near the ground, which causes the water in the box to easily accumulate in the lower part of the engine, but regardless of the specific reason, the sealing effect can be improved by being away from the ground)

[0037] (2) can be well sealed, and the degree of sealing is controllable;

[0038] When sealing, the soft magnet is adsorbed to achieve good sealing (compared to the general sealing rubber ring method, the sealing effect of the present application is better; because the sealing rubber ring is sealed by extrusion, and the present application is fixed by a rectangular prism, so the extrusion is not good enough, so the soft magnet is actively sealed by magnetization, which can exert a very large pressure to improve the sealing effect; and after magnetization, demagnetization can be achieved, that is, a large pressure can be actively removed, and the sealing place can be very easily opened)

[0039] (3) simple structure and simple operation, convenient for storage in the warehouse, and will not cause pollution to the warehouse;

[0040] The present application performs oil sealing and other work at a non-warehouse before sealing, and then is transported to the warehouse through the box bottom plate, so as not to cause pollution in the warehouse; for smaller warehouses, a winch can be used instead of a truck or forklift to lift off the ground, which is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a structural schematic view of the present application;

[0042] Figure 2 is a structural schematic view of the box bottom plate placing the reducer;

[0043] Figure 3 Structure diagram of the sealed air bag section;

[0044] Figure 4 Structure diagram of the coil wound outside the soft magnet in the sealed air bag (the soft magnet is rectangular - here it is drawn as a circle only for illustration);

[0045] Figure 5 Structure diagram of the lifting frame II;

[0046] Figure 6 Structure diagram of the box bottom plate carrying the reducer being pushed to the bearing plate on the lifting frame II;

[0047] Figure 7 Structure diagram of the box bottom plate carrying the reducer being lifted upward by the lifting frame II;

[0048] Figure 8 Structure diagram of the box bottom plate being lifted to the highest point;

[0049] Figure 9 Structure diagram of the box bottom plate and the bottomless box body being inserted into the rectangular prism and being fixed by the rectangular prism;

[0050] Figure 10 Structure diagram of the fixed box bottom plate, bottomless box body and horizontal beam frame moving downward together, and the sealed air bag section;

[0051] Figure 11 Structure diagram of the sealed air bag section;

[0052] Figure 12 Structure diagram of the sealed air bag section;

[0053] In the figure: 1 - vertical column frame;

[0054] 2 - bearing plate, 21 - slope plate;

[0055] 31 - lifting belt, 32 - winch;

[0056] 41 - bottomless box body, 4101 - fixing lug, 42 - box bottom plate;

[0057] 5 - rectangular prism, 7 - vertical column frame;

[0058] 81 - sealed air bag, 8101 - rubber layer, 8102 - rubber bottom support, 82 - soft magnet, 83 - coil;

[0059] 9 - pull rod. DETAILED DESCRIPTION

[0060] The application will be further described below with reference to the drawings, but the scope of protection of the application is not limited to the following description.

[0061] It should be noted that the directions or positional relationships indicated by "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the product of the application is usually placed, or the directions or positional relationships commonly understood by those skilled in the art. Such terms are only used for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0062] It should be noted that the embodiments in the application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0063] (Embodiment 1)

[0064] Referring to Figures 1-3 As shown in the figure, a mechanism for storing an external field reducer includes a cross beam frame I, a lifting frame II, and a box bottom plate 42.

[0065] The cross beam frame I is fixedly installed at a certain height from the ground in a warehouse, and a plurality of bottomless box bodies 41 are arranged at intervals on the cross beam frame I.

[0066] On the bottom surface of the warehouse, a box bottom plate 42 capable of sliding displacement and a lifting frame II are placed; the reducer can be placed on the box bottom plate 42; the lifting frame II has a bearing plate 2 and a lifting mechanism, and the bearing plate 2 can be lifted from the bottom surface to a certain height through the lifting mechanism.

[0067] In addition, a ring of sealing air bags 81 is arranged at the edge of the box bottom plate 42; a ring of soft magnets 82 is arranged in the cavity of the sealing air bag 81 along the sealing air bag 81, and a coil 83 is arranged in the rubber layer of the sealing air bag 81; the soft magnets 82 are charged and discharged through the coil 83.

[0068] When the reducer needs to be stored, the reducer is hoisted on the box bottom plate 42, and then the box bottom plate 42 is pushed onto the bearing plate 2 placed on the ground, the bearing plate 2, the box bottom plate 42, and the reducer are lifted upward through the lifting mechanism, and are buckled with the bottomless box body 41 to form a complete box for packaging the reducer; then a direct current voltage is applied to the coil 83 to magnetize the soft magnets 82, and the soft magnets 82 are adsorbed on the buckling surface of the bottomless box body 41 after magnetization, which is equivalent to that the soft magnets 82 press the sealing air bag 81 on the buckling surface of the bottomless box body 41, so that good sealing is achieved.

[0069] Of course, if you want to take the decelerator from the sealed box, you need to change the size of the alternating current to the coil 83, let the soft magnetic body 82 demagnetize, and then take out the floor 42 from the bottomless box 41.

[0070] Referring to Figure 2 , the circumferential edge of the bottom plate 42 is tapered, that is, it is conical with the upper part smaller and the lower part larger; the lower edge of the bottomless box 41 is flared circumferentially, that is, it is flared with the upper part smaller and the lower part larger; the tapered surface of the circumferential edge of the bottom plate 42 (which is the corresponding clamping surface) is adapted to the flared surface of the lower edge of the bottomless box 41 (which is the corresponding clamping surface); the sealing air bag 81 is arranged at the tapered surface of the bottom plate 42.

[0071] Referring to Figure 3 and Figure 4 , the sealing air bag 81 is rectangular; as viewed in cross section, the sealing air bag 81 has two layers of rubber layers 8101, and a coil 83 is wound between the two layers of rubber layers 8101; a soft magnetic body 83 is placed in the cavity of the innermost rubber layer 8101, and the soft magnetic body 83 is also arranged circumferentially along the edge of the bottomless box 41, that is, the soft magnetic body 83 is circumferentially wrapped around the bottomless box 41 once and the two ends of the soft magnetic body 83 are overlapped; and the coil 83 is equivalent to being wound on the soft magnetic body 83.

[0072] In addition, the sealing air bag 81 also has a rubber bottom support 8102 which is integrated with the outer rubber layer 8101; during installation: a ring-shaped groove is formed circumferentially on the bottom plate 42, and the rubber bottom support 8102 is fixed by being adhered with glue in the ring-shaped groove; the leads of the coil 83 are led out to the socket on the side surface of the bottom plate 42.

[0073] During operation, when direct current is supplied to the coil 83 through the socket, the soft magnetic body 83 is magnetized, and the soft magnetic body 83 presses the rubber layer 8101 against the corresponding clamping surface of the bottomless box 41 (due to the presence of the rubber bottom support 8102, the soft magnetic body 83 is closer to the clamping surface than to the clamping surface on the bottom plate 42); when alternating current of varying size is supplied to the coil 83, the soft magnetic body 83 is demagnetized.

[0074] (Example 2)

[0075] On the basis of Example 1, the lifting frame II is also designed.

[0076] Referring to Figure 5 , the lifting frame II includes two oppositely arranged column frames 7; a load-bearing plate 2 is placed on the ground between the two column frames 7; the column frame 7 is fixed on a base plate, the base plate is provided with a winch 32, and the top of the column frame 7 is provided with a fixed pulley;

[0077] The winches 32 on the two base plates are connected to one side of the load-bearing plate 2 after passing through the corresponding fixed pulleys via lifting belts 31.

[0078] In addition, the bottom surface of the substrate is provided with corresponding rollers, and the substrate is further provided with a driving wheel and a corresponding driving motor; the driving motor drives the driving wheel to rotate, thereby moving the substrate; the substrate is further supported and slid by the rollers;

[0079] During operation, the lifting frame II is displaced along the ground by the driving motor, so that the lifting frame II is located directly below the corresponding bottomless box body 41; then the winch 32 is operated to lift the two sides of the bearing plate 2 upward, and the box bottom plate 42 and the speed reducer are placed on the bearing plate 2; after the box bottom plate 42 is lifted upward, the speed reducer is buckled in the bottomless box body 41, thereby achieving the storage of the speed reducer off the ground.

[0080] Referring to Figure 1 , Figures 6-11 The bottomless box body 41 has a fixed lug 4101; the box bottom plate 42 includes a bottom plate portion and a support portion fixed in sequence as a whole; the bottom plate portion is buckled with the bottomless box body 41, and the support portion is provided with a rectangular slot hole in the left-right direction; when the box bottom plate 42 is buckled with the bottomless box body 41, a rectangular prism 5 is arranged in the rectangular slot hole and the fixed lug 4101, thereby achieving the fixed installation of the box bottom plate 42 and the bottomless box body 41.

[0081] Referring to Figures 5-11 The bottomless box body 42 is installed on the beam frame I by the telescopic cylinder, and the bottomless box body 42 and the beam frame I are further provided with a pull rod 9, and the top of the pull rod 9 is provided with a limiting nut; when the box bottom plate 41 is lifted and the bottomless box body 42 is lowered, the two are buckled; when the box bottom plate 4 and the bottomless box body 42 are fixed together, they act downward together, and are hung on the beam frame I through the pull rod 9 and the limiting nut.

[0082] In this embodiment, guide grooves are arranged on the ground of the warehouse, and the box bottom plate 41 and the lifting frame II are slid along the guide grooves by corresponding rollers.

[0083] In this embodiment, the bottomless box body 42 is further provided with a gas nozzle A connected with a nitrogen inflating mechanism, and a gas nozzle B for exhausting; the bottomless box body 42 is provided with a gas pressure monitor and a humidity detector, the electromagnetic valve at the nitrogen inflating mechanism and the gas nozzle B, the gas pressure monitor and the humidity detector are electrically connected with a control panel, and the control panel is arranged on the control cabinet of the warehouse room.

[0084] Referring to Figure 12, the bearing plate 2 is rectangular plate, its four edges are articulated with the slope plate 21; when the slope plate 21 is unfolded along the ground, the slope structure is formed. When the slope plate 21 is unfolded along the ground, the box bottom plate 42 carrying the engine is conveniently pushed to the bearing plate 2 through the slope plate 21; when the slope plate 21 is erected, the connecting rings on each slope plate 21 are connected through the iron wire, and the frame shape is surrounded, which can avoid the accidental situation of engine sliding (basically impossible to slide, just in case)

[0085] On the other hand, a sealing method for the mechanism of the field reducer sealing, the sealing step is:

[0086] S1, in the factory building which is not warehouse, the reducer is cleaned, rusted, oil sealed and packaged (without polluting the warehouse), then the reducer is hoisted on the box bottom plate 42 through the trolley, and the foot of the reducer is fixedly connected with the box bottom plate 42 through the bolt;

[0087] S2, the box bottom plate 42 carrying the engine is pushed into the warehouse;

[0088] In the warehouse, the lifting frame II is pushed to the blank bottomless box body 41 below along the guide groove on the ground;

[0089] Referring to Figure 6 The box bottom plate 42 carrying the reducer is pushed into the warehouse, and the box bottom plate 42 is pushed to the bearing plate 2 on the lifting frame II along the guide groove;

[0090] S3, referring to Figure 7 The winch 32 on the lifting frame II works to exert the lifting force from both sides of the bearing plate 2, so that the box bottom plate 42 and the reducer are lifted and moved upward, the circumferential taper of the box bottom plate 42 is preliminarily buckled with the flared part of the bottomless box body 41, and the bottomless box body 41 is preliminarily buckled;

[0091] Referring to Figure 8 Then the bottomless box body 41 is driven by the telescopic cylinder to act downward on the bottomless box body 41 to buckle again;

[0092] Referring to Figure 9 Then, the rectangular prism is inserted into the fixed ear 4101 of the bottomless box body 41 and the rectangular slot hole of the box bottom plate 42 to fix the bottomless box body 41 and the box bottom plate 42 together; at this time, the sealing air bag 81 contacts the buckling surface of the bottomless box body 42 preliminarily;

[0093] S3, direct current is input to the coil 83 to magnetize the soft magnet 82; the soft magnet 82 is closer to the buckling surface of the bottomless box body 42 than to the buckling surface of the box bottom plate 41, so that the soft magnet 82 is adsorbed at the buckling surface of the bottomless box body 42;

[0094] The soft magnet 82 presses the sealing air bag 81 on the fastening surface of the bottomless box 41 to realize sealing;

[0095] After sealing, nitrogen is introduced into the whole box, and the nitrogen flows out from the air outlet valve on the bottomless box 41. When the air in the whole box is exhausted, the air outlet valve is closed, and 0.3 atmosphere of nitrogen is injected into the whole box (a pressure detector, a humidity detector and the like are further arranged on the bottomless box 41);

[0096] S4, referring to Figure 10 Then the bearing plate 2 falls back, and at the same time the telescopic cylinder extends to make the bottomless box 41 fall back together with the reducer and the bottom plate 42 by a distance, so that the bottomless box 41 is hung on the beam frame I through the pull rod 9;

[0097] Referring to Figure 11 Then the bearing plate 2 continues to fall and is separated from the bottom plate 42;

[0098] S6, then the lifting frame II continues to slide along the guide groove to the bottom of another blank bottomless box 41, and the above-mentioned actions are repeated to seal another reducer.

[0099] The above-mentioned embodiments only express the more preferred embodiments, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for the ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A mechanism for sealing and storing a field speed reducer, characterized in that: include: A crossbeam frame I is fixedly installed at a certain height above the ground in the warehouse, and multiple bottomless boxes (41) are set on it at intervals. The bottom plate (42) of the box can slide on the ground and a speed reducer can be placed on it; Lifting frame II, which can slide on the ground, has a support plate (2) and a lifting mechanism; the lifting mechanism can lift the support plate (2) from the ground to a certain height; After the reducer is placed on the bottom plate (42), it slides along the ground to the bottom of the corresponding bottomless box (41). Then, the bottom plate (42) and the reducer are lifted upward by the lifting frame II through the lifting mechanism and the bearing plate (2), and the bottom plate (42) and the bottomless box (41) are fastened and fixedly connected to form a whole box, so that the reducer is sealed in the whole box off the ground; At the edge where the bottom plate (42) of the box and the bottomless box (41) are fastened, a sealing airbag (81) is provided; a soft magnet (82) is placed in the cavity of the sealing airbag (81) along the sealing airbag (81), and a coil (83) is wound in the rubber layer of the sealing airbag (81). When the coil (83) is charged with DC, the soft magnet (82) is magnetized and attracted to the corresponding fastening surface of the bottomless box (41). The soft magnet (82) applies pressure to the sealing airbag (81) to achieve sealing. When the coil (83) is charged with alternating current of varying magnitude, the soft magnet (82) is demagnetized, allowing the bottom plate (42) to be removed from the bottomless box (41).

2. The mechanism for sealing off an outdoor speed reducer according to claim 1, characterized in that: The circumferential edges of the bottom plate (42) of the box are sloped, forming a cone-shaped structure that is smaller at the top and larger at the bottom. The bottomless box (41) has a flared shape with a smaller top and a larger bottom along its lower edge; The circumferential conical surface of the bottom plate (42) is adapted to the flared surface at the lower edge of the bottomless box (41); the sealing airbag (81) is set at the conical surface of the bottom plate (42).

3. A mechanism for sealing off an outdoor speed reducer according to claim 1 or 2, characterized in that: The sealing airbag (81) has two rubber layers (8101). A coil (83) is wound between the two rubber layers (8101), and a soft magnet (83) is placed in the cavity of the innermost rubber layer (8101). The soft magnet (83) is also arranged circumferentially along the edge of the bottomless box (41). The coil (83) is equivalent to being wound on a soft magnet (83).

4. The mechanism for sealing off an outdoor speed reducer according to claim 3, characterized in that: The sealing airbag (81) also has a rubber base (8102), which is integrated with the outer rubber layer (8101); The bottom plate (42) of the box has an annular groove in its circumference, and the rubber base (8102) is glued and fixed in the annular groove.

5. The mechanism for sealing off an outdoor speed reducer according to claim 1, characterized in that: The lifting frame II includes two opposing upright frames (7). A support plate (2) is placed on the ground between the two column frames (7); The column frame (7) is fixed on the base plate, and a winch (32) is provided on the base plate. A fixed pulley is provided on the top of the column frame (7). The winches (32) on the two base plates are connected to one side of the bearing plate (2) after passing around the corresponding fixed pulleys via the lifting belt (31). The bottom surface of the substrate is provided with corresponding rollers, and the substrate is also provided with drive wheels and corresponding drive motors.

6. A mechanism for sealing off an outdoor speed reducer according to claim 1 or 5, characterized in that: The bottomless box (41) has a fixing lug (4101); The bottom plate (42) of the box includes a bottom plate part and a support part that are fixed together in the upper and lower positions. The bottom plate part is fastened to the bottomless box body (41), and the support part has rectangular slots along the left and right directions. After the bottom plate (42) of the box is fastened to the bottomless box (41), a rectangular prism (5) is inserted through the rectangular slot and the fixing ear (4101) to achieve the fixed installation of the bottom plate (42) and the bottomless box (41).

7. The mechanism for sealing off an outdoor speed reducer according to claim 1, characterized in that: The bottomless box (42) is installed on the crossbeam frame I via a telescopic cylinder. A tie rod (9) is also provided between the bottomless box (42) and the crossbeam frame I. A limit nut is provided at the top of the tie rod (9). When the bottom plate (41) is lifted and the bottomless box (42) is lowered, the two are fastened together; when the bottom plate (4) and the bottomless box (42) are fixed together, the two move downward together and are suspended on the crossbeam frame I by the pull rod (9) and the limit nut.

8. The mechanism for sealing off an outdoor speed reducer according to claim 1, characterized in that: A guide groove is provided on the ground of the warehouse, and the corresponding rollers of the bottom plate (41) and the lifting frame II slide along the guide groove.

9. A mechanism for sealing off an outdoor speed reducer according to claim 1, characterized in that: The bottomless box (42) is also provided with a gas nozzle A connected to the nitrogen filling mechanism and a gas nozzle B for exhaust. The bottomless box (42) is equipped with a pressure monitor and a humidity detector. The nitrogen filling mechanism, the solenoid valve at the gas nozzle B, the pressure monitor, and the humidity detector are all electrically connected to the control panel. The control panel is located on the control cabinet in the warehouse.

10. A sealing method for a mechanism used for sealing off field speed reducers, characterized in that: The sealing steps are as follows: S1. In a factory building that is not a warehouse, clean, remove rust, seal and package the reducer, and then hang the reducer on the bottom plate (42) of the box. S2. Inside the warehouse, push the lifting frame II along the guide groove on the ground to directly below the blank bottomless box (41); Push the bottom plate (42) of the gearbox carrying the reducer into the warehouse, and push the bottom plate (42) of the gearbox along the guide groove onto the bearing plate (2) on the lifting frame II; S3, the winch (32) on the lifting frame II works, applying lifting force from both sides of the bearing plate (2), so that the bottom plate (42) and the reducer are lifted and initially fastened to the bottomless box (41); Then, driven by the telescopic cylinder, the bottomless box (41) moves downward and presses against the bottomless box (41) to be fastened again; Then, the rectangular prism is inserted into the fixing lug (4101) of the bottomless box (41) and the rectangular slot of the bottom plate (42) to fix the bottomless box (41) and the bottom plate (42) together; at this time, the sealing airbag (81) initially contacts the fastening surface of the bottomless box (42); S4. Apply DC current to the coil (83) to magnetize the soft magnet (82); the soft magnet (82) is closer to the fastening surface of the bottomless box (42) than to the fastening surface of the bottom plate (41), so the soft magnet (82) is attracted to the fastening surface of the bottomless box (42); The soft magnet (82) presses the sealing airbag (81) against the snap-fit ​​surface of the bottomless box (41) to achieve a seal; S5. Then the bearing plate (2) falls back, and at the same time the telescopic cylinder extends to let the bottomless box (41) fall down a distance together with the reducer and the bottom plate (42), so that the bottomless box (41) is suspended on the crossbeam frame I by the tie rod (9). Then the support plate (2) continues to descend and separates from the bottom plate (42); S6. Then the lifting frame II continues to slide along the guide groove to the bottom of another blank bottomless box (41), and repeats the above action to seal the other reducer.

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