Bearing sealing structure

Abstract

The utility model discloses a bearing sealing structure, and belongs to the technical field of motor transmission equipment. A bearing sealing structure comprises a sleeve, a bearing cover is arranged at the end, away from a motor, of a transmission shaft, a connecting ring arranged on the transmission shaft in a sleeving mode is arranged on the inner side of the bearing cover, a lock washer is installed at the end, away from the bearing cover, of the connecting ring, and a shaft sleeve is arranged between the lock washer and a first bearing; by designing the first sealing ring and the second sealing ring, the two ends of the transmission shaft are effectively sealed, the first sealing ring adopts the design that the outer sealing ring and the inner sealing ring are integrally formed, the sealing effect between the outer sealing ring and the shaft sleeve and the surrounding environment is enhanced through the L-shaped cross section view of the outer sealing ring, and the sealing performance of the transmission shaft is further improved through the inner sealing ring; the second sealing ring effectively prevents leakage of lubricating oil and invasion of dust and water through the special structure, especially the design of the protruding blocks and the surrounding-shaped reinforcing ribs.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor drive equipment, and particularly relates to a bearing sealing structure. Background Art

[0002] A motor, usually referring to an electric motor or an engine, is a device that converts electrical energy into mechanical energy. It rotates by the force exerted on a current-carrying coil in a magnetic field, thereby driving the movement of other mechanical components. In a railway ballast cleaner, the connection between its motor and the transmission shaft is a component of the equipment. In large-scale mechanical equipment such as railway ballast cleaners, the connection between the motor and the transmission shaft and the design of its sealing structure are crucial. These devices often need to operate in harsh working environments, such as dusty, humid or high-temperature conditions. Therefore, ensuring the stability and durability of the transmission system has become the core consideration in the design.

[0003] Traditional bearing sealing structures may face various challenges, such as lubricating oil leakage, dust and moisture intrusion caused by insufficient sealing performance, and increased wear of the seals after long-term operation. These problems not only affect the operating efficiency of the equipment, but may also cause more serious mechanical failures, and even lead to equipment shutdown for maintenance, increasing the maintenance cost. Summary of the Invention

[0004] The purpose of the utility model is to provide a bearing sealing structure for the problems existing in the prior art.

[0005] To achieve the above purpose, the utility model is realized by adopting the following technical solutions: A bearing sealing structure includes a sleeve, and a transmission shaft installed inside the sleeve. A motor is provided at the upper end of the sleeve. A plurality of bearings are provided on the outer side of the transmission shaft. The bearings include a first bearing and a second bearing. A bearing cover is provided at one end of the transmission shaft away from the motor. A connecting ring sleeved with the transmission shaft is provided inside the bearing cover. A stop washer is installed at one end of the connecting ring away from the bearing cover. A shaft sleeve is provided between the stop washer and the first bearing. A first sealing ring is provided on the shaft sleeve. A second sealing ring is provided between the second bearing and the inner side wall of the sleeve.

[0006] By adopting the above technical solutions, through fine design and close cooperation among components, the bearing sealing structure realizes effective protection and sealing of the transmission system. The coordinated action of components such as the bearing cover, connecting ring, stop washer, shaft sleeve and sealing ring not only improves the transmission efficiency and service life, but also ensures the stable operation and long-term reliability of the equipment.

[0007] Optionally, the bearing cover includes an outer ring seat, an inner ring seat, and an inner ring plate integrally formed. The inner ring seat is fixedly connected to the inner side wall of the outer ring seat, and the height of the inner ring seat is higher than that of the outer ring seat. The inner ring plate is fixedly connected to the inner side wall of the inner ring seat and is parallel to the bottom wall of the inner ring seat.

[0008] By adopting the above technical solution, the height of the ring seat is higher than that of the outer ring seat, which helps to enhance the sealing effect. The inner ring plate is parallel to the bottom wall of the inner ring seat, jointly forming a surrounding structure for the transmission shaft.

[0009] Optionally, a plurality of fixing holes are provided on the surface of the outer ring seat, and the outer ring seat is connected to the sleeve through the fixing holes and fixing bolts.

[0010] By adopting the above technical solution, the fixing holes and fixing bolts make the connection between the bearing cover and the sleeve more firm and reliable. In addition, when maintenance or replacement of the seal is required, only the relevant components need to be simply disassembled, greatly reducing the maintenance cost and time.

[0011] Optionally, the first sealing ring is sleeved on the outside of the shaft sleeve. The outer diameter of the first sealing ring is larger than the outer diameter of the shaft sleeve. The first sealing ring is integrally formed by an outer sealing ring and an inner sealing ring. The cross-sectional view of the outer sealing ring is in the shape of an "L". The inner sealing ring is connected to the inner side wall of the outer sealing ring, and the height of the inner sealing ring is less than the height of the outer sealing ring.

[0012] By adopting the above technical solution, the cross-section of the outer sealing ring is in the shape of an "L", enhancing the sealing effect; the inner sealing ring is closely attached to the transmission shaft, further improving the sealing performance.

[0013] Optionally, the second sealing ring is integrally formed by an outer sealing member and an inner sealing member. The height of the inner sealing member is lower than the height of the outer sealing member. A raised block is provided on the inner sealing member, and the raised block is in contact with the outer side wall of the transmission shaft. Reinforcing ribs are provided on the raised block, and the reinforcing ribs are in a circular shape.

[0014] By adopting the above technical solution, the second sealing ring is located between the second bearing and the inner side wall of the sleeve. It is integrally formed by an outer sealing member and an inner sealing member. The inner sealing member is provided with a raised block in contact with the outer side wall of the transmission shaft and circular reinforcing ribs, improving the compressive and wear-resistant properties of the sealing ring.

[0015] Optionally, the output end of the motor is connected to the transmission shaft. A flange is provided on the motor, and the flange is connected to the sleeve through fastening bolts.

[0016] By adopting the above technical solution, a flange is provided on the motor and is connected to the sleeve through fastening bolts, achieving a firm connection between the motor and the sleeve and ensuring the continuity and stability of power transmission.

[0017] Optionally, the first sealing ring is sleeved on the outer periphery of the shaft sleeve and fits against the inner side wall of the sleeve, or the first sealing ring is installed between the shaft sleeve and the first bearing.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. By designing the first sealing ring and the second sealing ring, effective sealing of both ends of the transmission shaft is achieved. The first sealing ring adopts an integrated design of an outer sealing ring and an inner sealing ring. The "L"-shaped cross-section of the outer sealing ring enhances the sealing effect with the shaft sleeve and the surrounding environment, while the inner sealing ring further improves the sealing performance of the transmission shaft itself. The second sealing ring, through its special structure, especially the design of the raised blocks and the circumferential reinforcing ribs, ensures a tight fit with the outer side wall of the transmission shaft, effectively preventing lubricating oil leakage and the intrusion of dust and moisture; 2. The bearing cover adopts an integrated design of an outer ring seat, an inner ring seat, and an inner ring plate, which is not only structurally compact but also convenient for installation and disassembly. The fixing holes and fixing bolts on the outer ring seat make the connection between the bearing cover and the sleeve more firm and reliable. In addition, when maintenance or replacement of the seal is required, only the relevant components need to be simply disassembled, greatly reducing the maintenance cost and time. Description of the Drawings

[0020] Figure 1 It is a front view structural schematic diagram of the connection between the motor and the sleeve of the present utility model;

[0021] Figure 2 It is a cross-sectional structural schematic diagram of the connection between the motor and the sleeve of the present utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the bearing cover of the present utility model;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the connecting ring of the present utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the stop washer of the present utility model;

[0025] Figure 6 It is a cross-sectional structural schematic diagram of the first sealing ring of the present utility model;

[0026] Figure 7 It is a cross-sectional structural schematic diagram of the second sealing ring of the present utility model;

[0027] Figure 8 For the present utility model Figure 2 The enlarged structural schematic diagram at position A.

[0028] In the figure: 1. Sleeve; 2. Transmission shaft; 3. Motor; 301. Flange; 4. Bearing cover; 5. Connecting ring; 6. Lock washer; 7. Bush; 8. First bearing; 9. First sealing ring; 10. Second bearing; 11. Second sealing ring; 12. Protruding block; 13. Reinforcing rib. Detailed implementation mode

[0029] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work conditions belong to the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention 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 cannot be understood as a limitation to the present invention.

[0031] As Figure 1 shown in -8, the specific solution of the embodiment is as follows: A bearing sealing structure includes a sleeve 1. The sleeve 1 serves as the main part of the entire sealing structure. It not only provides stable support for the transmission shaft 2, but also provides necessary space for the installation of bearings and seals through its internal structure design. And a transmission shaft 2 installed inside the sleeve 1. The transmission shaft 2 is a key component for transmitting power. It transmits the rotational power generated by the motor 3 to other mechanical components. A motor 3 is provided at the upper end of the sleeve 1. The output end of the motor 3 is connected to the transmission shaft 2. A flange 301 is provided on the motor 3. The flange 301 is connected to the sleeve 1 through fastening bolts. The motor 3, as a power source, is directly connected to the transmission shaft 2 through its output end to drive the transmission shaft 2 to rotate. The flange 301 serves as a bridge connecting the motor 3 and the sleeve 1 and firmly connects the two through fastening bolts. This design ensures the continuity and stability of power transmission and is convenient for installation and disassembly;

[0032] A number of bearings are provided on the outer side of the transmission shaft 2. The bearings include a first bearing 8 and a second bearing 10. The first bearing 8 and the second bearing 10 are respectively installed at both ends of the transmission shaft 2, playing the roles of supporting and positioning the transmission shaft 2. They can reduce the friction and wear of the transmission shaft 2 during rotation, improve the transmission efficiency and service life. One end of the transmission shaft 2 away from the motor 3 is provided with a bearing cover 4. The bearing cover 4 is integrally formed with an outer ring seat, an inner ring seat and an inner ring plate. The inner ring seat is fixedly connected to the inner side wall of the outer ring seat, and the height of the inner ring seat is higher than that of the outer ring seat. The design of the inner ring seat with a higher height than the outer ring seat helps to enhance the sealing effect, prevent the leakage of lubricating oil and the intrusion of impurities. The inner ring plate is fixedly connected to the inner side wall of the inner ring seat, and the inner ring plate is parallel to the bottom wall of the inner ring seat. The inner ring seat and the inner ring plate together form a surrounding structure for the transmission shaft 2, providing a basis for the installation of subsequent seals. A number of fixing holes are provided on the surface of the outer ring seat. The outer ring seat is tightly connected to the sleeve 1 through the fixing holes and fixing bolts, ensuring the stability of the bearing cover 4 during operation.

[0033] A connecting ring 5 sleeved with the transmission shaft 2 is provided on the inner side of the bearing cover 4. The connecting ring is a round nut. The connecting ring 5 is tightly fitted with the transmission shaft 2 through the smooth surface on its inner side. One end of the connecting ring 5 away from the bearing cover 4 is installed with a stop washer 6. The stop washer 6 cooperates with the connecting ring 5 through its special design (such as a toothed structure), effectively preventing the connecting ring 5 from loosening under vibration or impact. This anti-loosening mechanism ensures the connection reliability between the transmission shaft 2 and the bearing cover 4, preventing seal failure or transmission failure caused by loosening. The tight fit between the stop washer 6 and the connecting ring 5 further enhances the sealing performance of the bearing sealing structure. By reducing the risk of loosening and leakage, the stop washer 6 helps to maintain the cleanliness and lubrication state of the transmission system, thereby extending the service life of the equipment. The stop washer 6 also has a certain shock absorption and noise reduction effect. During the rotation of the transmission shaft 2, the stop washer 6 can absorb part of the vibration and noise, making the operation of the equipment more stable and quiet;

[0034] A bushing 7 is provided between the stop washer 6 and the first bearing 8. The bushing 7 is installed between the stop washer 6 and the first bearing 8, playing a role of transition and support. It reduces the direct contact area between the transmission shaft 2 and the bearing, reduces friction and wear, and at the same time provides a basis for the installation of the first sealing ring 9. The first sealing ring 9 is provided on the bushing 7. The first sealing ring 9 is sleeved on the outer side of the bushing 7. The outer diameter of the first sealing ring 9 is greater than the outer diameter of the bushing 7. The first sealing ring 9 is integrally formed by an outer sealing ring and an inner sealing ring. The cross-sectional view of the outer sealing ring is in the shape of "L". The inner sealing ring is connected to the inner side wall of the outer sealing ring. The height of the inner sealing ring is less than the height of the outer sealing ring. The first sealing ring 9 is sleeved on the outer side of the bushing 7. The first sealing ring 9 is sleeved on the outer circumference of the bushing 7 and fits with the inner side wall of the sleeve 1. Or, the first sealing ring 9 is installed between the bushing 7 and the first bearing 8. Its unique design of integrally forming the outer sealing ring and the inner sealing ring effectively prevents the leakage of lubricating oil and the intrusion of impurities. The "L"-shaped cross-sectional view of the outer sealing ring enhances the sealing effect, while the inner sealing ring fits tightly with the transmission shaft 2, further improving the sealing performance.

[0035] A second sealing ring 11 is provided between the second bearing 10 and the inner side wall of the sleeve 1. The second sealing ring 11 is integrally formed by an outer sealing member and an inner sealing member. The height of the inner sealing member is lower than the height of the outer sealing member. A raised block 12 is provided on the inner sealing member. The raised block 12 fits with the outer side wall of the transmission shaft 2. Reinforcing ribs 13 are provided on the raised block 12. The reinforcing ribs 13 are in a surrounding shape. The second sealing ring 11 is located between the second bearing 10 and the inner side wall of the sleeve 1. Its design of integrally forming the outer sealing member and the inner sealing member ensures a good sealing effect. The design of the raised block 12 and the surrounding reinforcing ribs 13 on the inner sealing member not only enhances the fit with the outer side wall of the transmission shaft 2, but also improves the compressive resistance and wear resistance of the sealing ring, extending the service life.

[0036] The installation steps of the above-mentioned bearing sealing structure are as follows:

[0037] Fix the sleeve 1 on the workbench to ensure its stable position, and insert the transmission shaft 2 into the sleeve 1 to ensure the correct connection between the transmission shaft 2 and the output end of the motor 3;

[0038] Install the second sealing ring 11 between the second bearing 10 and the inner side wall of the sleeve 1 to ensure that the outer sealing member and the inner sealing member fit tightly with the transmission shaft 2 and the sleeve 1;

[0039] Install the first bearing 8 and the second bearing 10 at both ends of the transmission shaft 2 respectively to ensure that the bearings are installed in place and rotate flexibly. The second bearing 10 is located at the upper end of the second sealing ring 11;

[0040] Install the shaft sleeve 7 and the first sealing ring 9, and make the first sealing ring 9 fit tightly with the shaft sleeve 7 to achieve good sealing;

[0041] Then install the stop washer 6, the stop washer 6 and the bearing cover 4 in sequence, and tightly connect the bearing cover 4 with the sleeve 1 through the fixing holes and fixing bolts on the outer ring seat;

[0042] After the second bearing 10 is installed, place the motor 3 on the upper end of the sleeve 1, align the flange 301 holes with the corresponding hole positions on the sleeve 1, and use the fastening bolts to firmly connect the flange 301 with the sleeve 1 to ensure that the connection is tight and there is no looseness;

[0043] After the installation is completed, conduct a comprehensive inspection of the entire sealing structure to ensure that all components are installed correctly and there is no looseness. Conduct a trial run to check whether the rotation of the transmission shaft 2 is stable, without abnormal noise and vibration, and check the sealing performance to ensure that there is no leakage of lubricating oil and no intrusion of impurities.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bearing sealing structure, comprising a sleeve and a transmission shaft installed inside the sleeve. A motor is provided at the upper end of the sleeve, and a plurality of bearings are provided outside the transmission shaft. The bearings include a first bearing and a second bearing, and the feature is that, One end of the transmission shaft away from the motor is provided with a bearing cover. Inside the bearing cover, there is a connecting ring sleeved on the transmission shaft. One end of the connecting ring away from the bearing cover is installed with a stop washer. There is a bushing between the stop washer and the first bearing. A first sealing ring is provided on the bushing. A second sealing ring is provided between the second bearing and the inner side wall of the sleeve.

2. The bearing sealing structure according to claim 1, characterized in that: The bearing cover includes an outer ring seat, an inner ring seat and an inner ring plate integrally formed. The inner ring seat is fixedly connected to the inner side wall of the outer ring seat, and the height of the inner ring seat is higher than that of the outer ring seat. The inner ring plate is fixedly connected to the inner side wall of the inner ring seat, and the inner ring plate is parallel to the bottom wall of the inner ring seat.

3. A bearing sealing structure according to claim 2, characterized in that: A plurality of fixing holes are formed on the surface of the outer ring seat. The outer ring seat is connected to the sleeve through the fixing holes and fixing bolts.

4. A bearing sealing structure according to claim 1, characterized in that: The first sealing ring is sleeved on the outside of the bushing. The outer diameter of the first sealing ring is larger than the outer diameter of the bushing. The first sealing ring is integrally formed by an outer sealing ring and an inner sealing ring. The cross-sectional view of the outer sealing ring is in an "L" shape. The inner sealing ring is connected to the inner side wall of the outer sealing ring. The height of the inner sealing ring is less than that of the outer sealing ring.

5. The bearing sealing structure according to claim 1, characterized in that: The second sealing ring is integrally formed by an outer sealing member and an inner sealing member. The height of the inner sealing member is lower than that of the outer sealing member. There are raised blocks on the inner sealing member. The raised blocks are in contact with the outer side wall of the transmission shaft. Reinforcing ribs are provided on the raised blocks. The reinforcing ribs are in a circular shape.

6. The bearing seal structure according to claim 1, characterized in that: The output end of the motor is connected to the transmission shaft. A flange is provided on the motor. The flange is connected to the sleeve through fastening bolts.

7. The bearing sealing structure according to claim 1, characterized in that: The first sealing ring is sleeved on the outer periphery of the bushing and is in contact with the inner side wall of the sleeve. Or, the first sealing ring is installed between the bushing and the first bearing.

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