Novel top cover for a reduction gearbox

Abstract

This utility model relates to the field of gearbox top cover technology and discloses a novel gearbox top cover, including a connecting straight pipe. The upper end of the connecting straight pipe is connected to the gearbox cover body by bolts. A nut is threaded onto the axial side wall of the bolts. A filter assembly for filtering grease is provided on the connecting straight pipe. A fixing assembly for clamping and fixing felt is provided on the connecting straight pipe. A discharge assembly for venting steam is provided on the gearbox cover body. Grease is filtered by a filter plate. Because the filter plate is inclined downwards, when there is too much grease on the filter plate, it will flow down due to gravity. When the grease leaves the filter plate, the weight of the filter plate decreases. At this time, the torsion spring will cause the filter plate to vibrate, thereby shaking the grease off the filter plate and preventing the filter plate from being filled with grease, which would affect the filtration effect.

Description

Technical Field

[0001] This utility model relates to the technical field of gearbox top cover, specifically a novel gearbox top cover. Background Technology

[0002] A gearbox, also known as a speed reducer or reducer, is a mechanical transmission device used to reduce speed and increase output torque. It is widely used in various industrial fields. The top cover of the gearbox needs to have good sealing performance to prevent lubricating oil leakage and external impurities from entering the gearbox.

[0003] The existing coal mill gearbox top cover connection pipe is a straight pipe type, with a straight top cover. When the unit is running, the internal temperature of the gearbox increases, and lubricating oil vapor enters the top cover area through the connection pipe. The top cover balances the internal air pressure through the vent valve, and the lubricating oil vapor evaporates out with the vent valve. The external ambient temperature is low, and the oil vapor condenses, causing obvious oil stains on the gearbox shell, which seriously affects the stability of equipment operation and the cleanliness of the site, and also poses a safety hazard. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of gearbox top cover to solve the problems mentioned in the background art, where the connecting pipe of the gearbox top cover of the coal mill is a straight pipe and the top is a straight-through top cover. When the unit is running, the internal temperature of the gearbox increases, and the lubricating oil vapor enters the top cover area through the connecting pipe. The top cover balances the internal air pressure through the vent valve, and the lubricating oil vapor evaporates out with the vent valve. The external ambient temperature is low, and the oil vapor condenses, causing obvious oil stains on the gearbox shell, which seriously affects the stability of equipment operation and the on-site hygiene, and also poses a safety hazard.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel gearbox top cover, comprising a connecting straight pipe, the upper end of which is bolted to a gearbox cover body, a nut threaded onto the axial sidewall of the bolt, a filter assembly for filtering grease on the connecting straight pipe, a fixing assembly for clamping and fixing felt on the connecting straight pipe, and a discharge assembly for emitting steam on the gearbox cover body.

[0006] Preferably, the filter assembly includes a first chamber formed in the connecting straight pipe and several mounting slots, wherein a connecting shaft is fixedly mounted on two of the mounting slots, a filter plate is rotatably mounted on the axial sidewall of the connecting shaft, and a torsion spring is provided between the filter plate and the connecting shaft.

[0007] Preferably, the fixing component includes a second chamber formed on the connecting straight pipe, a fixing groove is formed on the connecting straight pipe, a fixing block is slidably installed on the fixing groove, a connecting rod is fixedly installed at the rear end of the fixing block, a spring is provided between the fixing block and the fixing groove, and a displacement rod is fixedly installed between the two connecting rods.

[0008] Preferably, the emission assembly includes a plurality of exhaust slots formed on the gearbox cover body, each of the plurality of exhaust slots being provided with an exhaust pipe, and a one-way exhaust valve being provided on the axial sidewall of the exhaust pipe.

[0009] Preferably, the size of the second chamber is greater than the thickness of the felt board.

[0010] Preferably, the two filter plates do not come into contact when they move.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The connecting straight pipe and the gearbox cover are fixed together by bolts and nuts, making them easy to install and disassemble.

[0013] 2. With the cooperation of the displacement rod, connecting rod, fixing block, spring and fixing groove, the felt plate is placed into the second chamber, and the fixing block moves onto the felt plate to fix the felt plate, so as to prevent the strong air pressure from causing the felt plate to fall off, thus preventing the grease from coming into contact with the gearbox cover body. Moreover, the fixing components also make it easy to replace the felt plate, and prevent the felt plate from being covered with grease over time, which would affect the flow of gas.

[0014] 3. The grease is filtered through the filter plate. Because the filter plate is tilted downwards, when there is too much grease on the filter plate, it will flow down due to gravity. When the grease leaves the filter plate, the weight of the filter plate decreases. At this time, the torsion spring will cause the filter plate to vibrate, thereby shaking the grease off the filter plate and preventing the filter plate from being filled with grease, which would affect the filtration effect.

[0015] 4. When the reducer is working for a long time, the air pressure inside the reducer will increase. At this time, the air pressure will be discharged through the exhaust pipe. The one-way exhaust valve will open when it is subjected to air pressure, so that the gas can be discharged and the air pressure inside and outside the reducer can be consistent, thus avoiding the situation of pressure buildup inside the reducer. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is an overall cross-sectional view of the present invention;

[0018] Figure 3 This is a cross-sectional view of the filter assembly of this utility model;

[0019] Figure 4 This is a cross-sectional view of the fixing component of this utility model;

[0020] Figure 5 For the present utility model Figure 4 Enlarged view of point A;

[0021] Figure 6 This is a cross-sectional view of the emission component of this utility model.

[0022] In the diagram: 1. Connecting straight pipe; 11. Gearbox cover body; 12. Bolt; 13. Nut; 2. Filter assembly; 3. Fixing assembly; 4. Discharge assembly; 21. First chamber; 22. Mounting groove; 23. Connecting shaft; 24. Filter plate; 25. Torsion spring; 31. Second chamber; 32. Fixing groove; 33. Fixing block; 34. Connecting rod; 35. Spring; 36. Displacement rod; 41. Exhaust groove; 42. Exhaust pipe; 43. One-way exhaust valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figure 1 - Figure 5 The new type of gearbox top cover includes a connecting straight pipe 1. The upper end of the connecting straight pipe 1 is connected to the gearbox cover body 11 by bolts 12. Nuts 13 are threaded onto the axial side wall of bolts 12. A filter assembly 2 for filtering grease is provided on the connecting straight pipe 1. The filter assembly 2 adopts a folded plate form to filter out all grease. A fixing assembly 3 for clamping and fixing felt is provided on the connecting straight pipe 1. The fixing assembly 3 can fix the felt to prevent strong air pressure from pulling the felt off-center, and it can also facilitate the replacement of the felt. A discharge assembly 4 for venting steam is provided on the gearbox cover body 11. The discharge assembly 4 can vent steam in the gearbox to prevent the gearbox from being damaged due to uneven air pressure inside and outside.

[0025] The filter assembly 2 includes a first chamber 21 formed in the connecting straight pipe 1 and several mounting slots 22. A connecting shaft 23 is fixedly mounted on two mounting slots 22. A filter plate 24 is rotatably mounted on the axial side wall of the connecting shaft 23. A torsion spring 25 is provided between the filter plate 24 and the connecting shaft 23. The filter plate 24 is inclined to facilitate the flow of grease back. When too much grease is present, the grease will drip down from the end of the filter plate 24. At this time, the weight on the filter plate 24 suddenly decreases, and the filter plate 24 will vibrate under the action of the torsion spring 25, which will shake the grease off the filter plate 24.

[0026] The fixing component 3 includes a second chamber 31 opened on the connecting straight pipe 1. A fixing groove 32 is opened on the connecting straight pipe 1. A fixing block 33 is slidably installed on the fixing groove 32. A connecting rod 34 is fixedly installed at the rear end of the fixing block 33. A spring 35 is provided between the fixing block 33 and the fixing groove 32. A displacement rod 36 is fixedly installed between the two connecting rods 34.

[0027] The second chamber 31 is larger than the thickness of the felt plate, and the felt plate can be fixed by the fixing component 3 to prevent the felt plate from falling off due to excessive air pressure, thereby affecting the grease from sticking to the gearbox cover body 11.

[0028] The two filter plates 24 will not come into contact when they move, thus preventing them from getting stuck and thus preventing the torsion spring 25 from functioning.

[0029] In this embodiment: First, the connecting straight pipe 1 and the gearbox cover body 11 are fixed together by the cooperation of bolts 12 and nuts 13, which facilitates installation and disassembly. Then, the displacement rod 36 is pulled, which drives the two connecting rods 34 and the fixing block 33 to compress the spring 35 and slide on the fixing groove 32. Then, the felt plate is placed into the second chamber 31. Then, the displacement rod 36 is loosened. At this time, the fixing block 33 moves onto the felt plate by the action of the spring 35, thereby fixing the felt plate and preventing the strong air pressure from causing the felt plate to fall off, thus preventing the grease from coming into contact with the gearbox cover body 11. Moreover, the fixing component 3 also facilitates the adjustment of the felt plate. Replace the filter plate regularly to prevent it from becoming covered in grease over time, which could obstruct gas flow. During gearbox operation, water vapor inevitably rises, carrying grease. The grease is filtered through the filter plate 24. Because the filter plate 24 is tilted downwards, excessive grease will flow down due to gravity. As the grease leaves the filter plate 24, its weight decreases, causing the torsion spring 25 to vibrate and dislodge the grease, preventing it from accumulating and affecting filtration.

[0030] Example 2: This example is an improvement on Example 1. For details, please refer to [link / reference]. Figure 6 The discharge assembly 4 includes several exhaust slots 41 opened on the gearbox cover body 11. Each exhaust slot 41 is provided with an exhaust pipe 42. A one-way exhaust valve 43 is provided on the axial side wall of the exhaust pipe 42. When the one-way exhaust valve 43 is under pressure, it will open, and the steam in the gearbox will be discharged to avoid pressure difference between the inside and outside.

[0031] In this embodiment: when the reducer works for a long time, the air pressure inside the reducer will increase. At this time, the air pressure will be discharged through the exhaust pipe 42. The one-way exhaust valve 43 will open when subjected to air pressure, thereby allowing the gas to be discharged and avoiding the situation of pressure buildup inside the reducer.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel gearbox top cover, comprising a connecting straight pipe (1), wherein the upper end of the connecting straight pipe (1) is connected to a gearbox cover body (11) by a bolt (12), and a nut (13) is threaded onto the axial sidewall of the bolt (12), characterized in that: The connecting straight pipe (1) is provided with a filter assembly (2) for filtering grease, the connecting straight pipe (1) is provided with a fixing assembly (3) for clamping and fixing felt, and the gearbox cover body (11) is provided with a discharge assembly (4) for discharging steam.

2. The novel gearbox top cover according to claim 1, characterized in that: The filter assembly (2) includes a first chamber (21) opened in the connecting straight pipe (1) and several mounting slots (22), wherein a connecting shaft (23) is fixedly installed on two of the mounting slots (22), a filter plate (24) is rotatably installed on the axial side wall of the connecting shaft (23), and a torsion spring (25) is provided between the filter plate (24) and the connecting shaft (23).

3. The novel gearbox top cover according to claim 2, characterized in that: Two of the filter plates (24) do not come into contact when they move.

4. The novel gearbox top cover according to claim 1, characterized in that: The fixing component (3) includes a second chamber (31) opened on the connecting straight pipe (1), a fixing groove (32) is opened on the connecting straight pipe (1), a fixing block (33) is slidably installed on the fixing groove (32), a connecting rod (34) is fixedly installed at the rear end of the fixing block (33), a spring (35) is provided between the fixing block (33) and the fixing groove (32), and a displacement rod (36) is fixedly installed between the two connecting rods (34).

5. The novel gearbox top cover according to claim 4, characterized in that: The second chamber (31) is larger than the thickness of the felt board.

6. The novel gearbox top cover according to claim 1, characterized in that: The discharge assembly (4) includes a plurality of exhaust slots (41) formed on the gearbox cover body (11), and each of the plurality of exhaust slots (41) is provided with an exhaust pipe (42), and a one-way exhaust valve (43) is provided on the axial side wall of the exhaust pipe (42).

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