Sight hole cover for coal mine speed reducer

Abstract

The inspection hole cover comprises a cover body, the cover body is detachably fixed to a corresponding opening in the reduction gearbox, an oil injection hole is formed in the cover body, the diameter of the oil injection hole is slightly smaller than that of the upper opening of the reduction gearbox, a filter screen is installed on the oil injection hole, and an end cover covers an installation groove. The end cover and the cover body are detachably fixed. The device has the effects that lubricating oil can be conveniently and rapidly added into the reduction gearbox, the oil adding efficiency is improved, and the operation difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of speed reducers, in particular to a manhole cover for a coal mine speed reducer. BACKGROUND

[0002] In coal mine underground operation, the lubrication state of the speed reducer as one of the key equipment is directly related to the stable operation and service life of the equipment. At present, the commonly used speed reducer manhole cover structure usually adopts the mode that an oil injection filter is fixed on the manhole cover through bolts, and a threaded hole is arranged above the filter to install an oil plug or an air cap. When oiling, the oil plug needs to be unscrewed first, and then the lubricating oil is injected through the oil injection filter.

[0003] Limited by the size of the oil plug, the diameter of the actual oil injection channel is small, which causes inconvenient operation during oiling, easy misalignment, and further causes slow oiling or even oil overflow. In addition, since the diameter of the filter screen must be smaller than the diameter of the middle hole of the manhole cover, the filtering area is limited, the oiling efficiency is low, and oil overflow and pollution are easy to occur. Especially under the condition that the coal mine underground environment is complex and the operation space is limited, the oiling operation is difficult. CONTENT OF THE UTILITY MODEL

[0004] In order to facilitate the rapid injection of lubricating oil into the speed reducer, improve the oiling efficiency, and reduce the operation difficulty, the application provides a manhole cover for a coal mine speed reducer.

[0005] The manhole cover for a coal mine speed reducer provided by the application adopts the following technical scheme:

[0006] The manhole cover for a coal mine speed reducer comprises a cover body, the cover body is detachably fixed on a corresponding opening of a speed reducer box, an oil injection hole is formed in the cover body, the oil injection hole penetrates the cover body along the axial direction thereof, the diameter of the oil injection hole is slightly smaller than the diameter of the opening of the speed reducer box, a filter screen is installed on the oil injection hole, an end cover is arranged on the installation groove, and the end cover is detachably fixed with the cover body. An air vent hole is formed in the end cover, and an air cap is installed on the air vent hole.

[0007] By adopting the above technical scheme, the opening diameter of the oil injection channel is effectively enlarged by arranging the oil injection hole on the cover body and installing the filter screen on the oil injection hole, so that the oil injection process is smoother, and the backflow and overflow phenomena during oil injection are reduced. At the same time, the detachable end cover not only plays a dustproof and sealing role, but also facilitates maintenance and cleaning, and improves the practicality and safety during equipment use. The speed reducer generates heat during operation due to gear friction and bearing operation, which causes the internal air to expand or contract due to cooling, resulting in unbalanced air pressure. The arrangement of the air cap and the air vent hole can ensure the balance of the air pressure inside and outside the speed reducer

[0008] Preferably, the cover is provided with a mounting groove, the mounting groove is arranged through the cover along the thickness direction of the cover from the outside to the inside, the oil injection hole is arranged on the bottom wall of the mounting groove, the filter screen extends to the opening side along the diameter direction of the filter screen and is outwardly bent to form a baffle, the filter screen is arranged into the oil injection hole, and the baffle is abutted against the bottom wall of the mounting groove.

[0009] By adopting the above technical scheme, the mounting groove enables the filter screen to be directly embedded into the oil injection hole from the outside, and the filter screen placed directly in the mounting groove enables the staff to directly remove the filter screen when refueling, thereby further improving the refueling efficiency.

[0010] Preferably, the cover is fixedly arranged on the reduction box through a plurality of bolts, and the end cover is fixedly arranged opposite to the cover through a plurality of bolts.

[0011] By adopting the above technical scheme, the staff can quickly assemble or disassemble the cover or the end cover through the bolts.

[0012] Preferably, the breather cap is threadedly connected with the breather hole, and the breather cap is provided with a positioning structure formed thereon for facilitating rotation.

[0013] By adopting the above technical scheme, the breather cap is stably connected with the breather hole through thread connection, and the breather cap is provided with the positioning structure for facilitating rotation, so that the assembly or disassembly operation in a narrow space or with the aid of a tool is more convenient, and the flexibility and operability of on-site operation are enhanced.

[0014] Preferably, the positioning structure is an internal hexagonal hole.

[0015] By adopting the above technical scheme, the positioning structure is an internal hexagonal hole, so that a common tool such as an internal hexagonal wrench can be used for accurate operation, the convenience and practicality during disassembly of the breather cap are improved, and the reliability of the positioning operation is enhanced.

[0016] Preferably, a positioning step for positioning the oil gun is further formed on the inner side wall of the filter screen.

[0017] By adopting the above technical scheme, the positioning step is arranged on the inner side wall of the filter screen, so that the nozzle of the oil gun can be accurately guided and stably positioned, the problems such as deviation and slipping during oil injection are avoided, the oil injection is ensured to be accurate and efficient, and the risk of human error is reduced.

[0018] Preferably, the cover comprises a fixing block and a sealing block, the diameter of the sealing block is smaller than that of the fixing block, the sealing block is embedded on the opening of the reduction box, a sealing ring is sleeved on the sealing block, and the side wall of the sealing ring is abutted against the side wall of the opening of the reduction box.

[0019] By adopting the technical scheme, the cover body is designed as a fixed block combined with a sealing block, and a sealing ring is sleeved on the sealing block, so that reliable sealing is formed when the cover body is embedded into the opening of the reduction box, the overall sealing effect and protection capability are improved, impurities such as coal dust and oil stains are prevented from invading the inside of the reduction box, and the service life of the equipment is prolonged.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. By providing an oil injection hole on the cover body and installing a filter screen, the oil injection passage opening is effectively enlarged, the oil injection process is smoother, the backflow and overflow problems are significantly reduced, and the oil injection operation in the coal mine underground environment is fast and efficient;

[0022] 2. By providing a vent hole and a vent cap, the problem of internal and external air pressure imbalance caused by temperature change during operation of the speed reducer is solved; at the same time, the cover body structure is designed in combination of a sealing block and a sealing ring, the overall sealing effect is enhanced, coal dust and oil stains are effectively prevented from entering the inside of the reduction box, and the service life of the equipment is prolonged;

[0023] 3. Each component such as the filter screen, the end cap, the vent cap, etc. is designed to be detachable, the installation structure is reasonable, quick assembly and disassembly can be realized, and the practicality and maintenance efficiency of the system as a whole are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is the isometric view of the coal mine speed reducer sight glass cover installed on the reduction box in the embodiment of the present application;

[0025] Fig. 2 is the sectional view of the internal structure of the coal mine speed reducer sight glass cover in the embodiment of the present application;

[0026] Fig. 3 is the exploded view of the overall structure of the coal mine speed reducer sight glass cover in the embodiment of the present application.

[0027] Reference signs: 1, cover body; 11, fixed block; 12, sealing block; 13, mounting groove; 14, oil injection hole; 2, sealing ring; 3, filter screen; 31, positioning step; 32, baffle; 4, end cap; 41, vent hole; 5, vent cap; 51, inner hexagonal hole; 100, reduction box. DETAILED DESCRIPTION

[0028] The following will be described in detail in combination with the Figs. 1-3 The present application will be further described in detail.

[0029] The embodiment of the present application discloses a coal mine speed reducer sight glass cover.

[0030] Reference Figs. 1-3The manhole cover for coal mine speed reducer includes a cover body 1 corresponding to the opening on the speed reducer box 100, the cover body 1 includes a fixed block 11 and a sealing block 12, the diameter of the sealing block 12 is smaller than that of the fixed block 11, the sealing block 12 is located on one side of the fixed block 11 in the axial direction, and the sealing block 12 and the fixed block 11 are integrally formed. The inner side wall of the opening on the speed reducer box 100 is formed with a step, the fixed block 11 and the sealing block 12 are embedded on the opening of the speed reducer box 100, and the side surface of the fixed block 11 close to the sealing block 12 abuts on the step of the opening of the speed reducer box 100. The sealing ring 2 is embedded on the side surface of the sealing block 12, and the side wall of the sealing ring 2 abuts on the side wall of the opening of the speed reducer box 100. The fixed block 11 is detachably fixed with the box body of the speed reducer box 100 through a plurality of bolts arranged in the circumferential direction of the axial direction.

[0031] The cover body 1 is provided with a mounting groove 13 penetrating the cover body 1 in the axial direction from the outside to the inside. The bottom wall of the mounting groove 13 is provided with an oil injection hole 14 penetrating the cover body 1 in the axial direction thereof, and the diameter of the oil injection hole 14 is slightly smaller than the diameter of the opening on the speed reducer box 100. A filter screen 3 is installed in the mounting groove 13. The filter screen 3 is in a cylindrical shape, one end of the filter screen 3 is provided with an opening, and the filter screen 3 extends in the diameter direction thereof and is bent outwardly to form a baffle plate 32 abutting on the bottom wall of the mounting groove 13. The filter screen 3 penetrates the oil injection hole 14 in the axial direction thereof. The inner side wall of the side of the filter screen 3 close to the baffle plate 32 is further formed with a positioning step 31. When the staff adds oil, the oil gun can be abutted on the positioning step 31, the barrel of the oil gun is inserted into the inside of the filter screen 3, and the lubricating oil is injected.

[0032] The upper side of the mounting groove 13 is further provided with an end cover 4, and the end cover 4 is relatively fixed with the cover body 1 through a plurality of bolts arranged in the circumferential direction of the axial direction. The end cover 4 is further provided with a vent hole 41, and a vent cap 5 is installed on the vent hole 41 and is threadedly fixed with the side wall of the vent hole 41. The outer side of the axial direction of the vent cap 5 is provided with a positioning structure, which is an internal hexagonal hole 51 penetrating the vent cap 5 in the axial direction thereof from the outside to the inside. The internal hexagonal hole 51 facilitates the staff to quickly install or remove the vent cap 5.

[0033] The implementation principle of the manhole cover for the coal mine speed reducer of the embodiment of the present application is as follows: the staff embeds the sealing block 12 of the cover body 1 on the opening of the speed reducer box 100, fixes the fixing block 11 on the speed reducer box 100 through a plurality of bolts, makes the bottom end of the filter screen 3 pass through the oil injection hole 14, and makes the baffle 32 abut on the bottom wall of the installation groove 13. The end cover 4 is fixed on the cover body 1 through a plurality of bolts. The air cap 5 is installed on the air hole 41 by using an internal hexagonal wrench. When it is necessary to add lubricating oil, the staff can choose to add oil into the speed reducer box 100 through the air hole 41 by removing the air cap 5 or through the filter screen 3 by removing the end cover 4. When the oil is added into the speed reducer box 100 from the filter screen 3, the barrel of the oil gun can be inserted into the filter screen 3, so that the oil gun abuts on the positioning step 31, thereby facilitating the staff to position the oil gun. At the same time, the lubricating oil can be quickly added into the speed reducer box 100 from the filter screen 3, thereby improving the oil adding efficiency and reducing the operation difficulty. Further, the staff can also remove the filter screen 3 and directly inject oil into the speed reducer box 100 from the oil injection hole 14, thereby further improving the oil adding efficiency.

[0034] The above are the preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A manway cover for a coal mine speed reducer, characterized in that: The utility model provides a cover (1) can be detachably fixed on the corresponding opening of reduction gearbox (100), the cover (1) is provided with oil filling hole (14), the oil filling hole (14) penetrates the cover (1) along its own axial direction, the diameter of oil filling hole (14) is slightly smaller than the diameter of the opening of reduction gearbox (100), the oil filling hole (14) is provided with filter screen (3), the oil filling hole (14) is provided with end cover (4), the end cover (4) is detachably fixed with the cover (1), the end cover (4) is also provided with air hole (41), the air hole (41) is provided with air cap (5).

2. The manway cover for coal mine speed reducer according to claim 1, characterized in that: The cover (1) is provided with mounting groove (13), the mounting groove (13) is arranged in the cover (1) from outside to inside along the thickness direction of the cover (1), the oil filling hole (14) is arranged on the bottom wall of the mounting groove (13), the filter screen (3) extends to the opening side along its own diameter direction and is outwardly bent with baffle (32), the filter screen (3) penetrates into the oil filling hole (14), and the baffle (32) is abutted on the bottom wall of the mounting groove (13).

3. The manway cover for coal mine speed reducer according to claim 1, characterized in that: The cover (1) is fixedly installed on the reduction gearbox (100) through a plurality of bolts, and the end cover (4) is fixedly connected with the cover (1) through a plurality of bolts.

4. The manway cover for coal mine speed reducer according to claim 1, characterized in that: The air cap (5) is screwed with the air hole (41), and the air cap (5) is formed with positioning structure for facilitating rotation.

5. The manway cover for coal mine speed reducer according to claim 4, characterized in that: The positioning structure is an internal hexagonal hole (51).

6. The manway cover for coal mine reduction gear as claimed in claim 1, characterized in that: The inner side wall of the filter screen (3) is further formed with positioning step (31) for positioning the oil gun.

7. The manway cover for coal mine reduction gear as claimed in claim 1, characterized in that: The cover (1) comprises a fixing block (11) and a sealing block (12), the diameter of the sealing block (12) is smaller than that of the fixing block (11), the inner side wall of the opening of the reduction gearbox (100) is formed with a step, the fixing block (11) and the sealing block (12) are embedded on the opening of the reduction gearbox (100), one side surface of the fixing block (11) close to the sealing block (12) is abutted on the step of the opening of the reduction gearbox (100), and the sealing block (12) is sleeved with a sealing ring (2), and the side wall of the sealing ring (2) is abutted on the side wall of the opening of the reduction gearbox (100).

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