CN214036532U - Bearing end cover assembly - Google Patents

Abstract

The utility model discloses a bearing end cover subassembly, include: the first end cover is of a stepped annular structure, an opening area in the center of the first end cover is a shaft hole, at least one circle of groove is formed on the inner side surface of the first end cover facing the shaft hole, and a sealing element and an oil injection ring are arranged in the groove and used for sealing a shaft; a through hole is formed in the outer side surface of the first end cover and communicated with the oil injection ring; the second end cover is of a stepped annular split structure and is used for being mounted on the first end cover, and the split structure is split along the radial direction of the second end cover to form two stepped semi-annular structures; the central opening area of the second end cover is an axle hole, and at least two circles of grooves which are sequentially arranged along the axial direction of the axle hole are formed on the inner side surface of the second end cover facing to the axle hole and are respectively used for installing the first end cover and the sealing piece. The utility model discloses a multistage sealed and subdivision formula structure has solved the problem that the convenience was changed to the sealing washer.

Description

Bearing end cover assembly

Technical Field

The utility model belongs to the technical field of sealing device, specifically speaking relates to a bearing end cover for shaft seal.

Background

The bearing end cover is a very important mechanical part and is generally used for axially positioning the bearing outer ring. The bearing end cover is internally provided with a cavity, and the cavity is internally provided with a sealing ring generally to be matched with the bearing end cover to achieve the effects of sealing and dust prevention.

In the mechanical industry, some mechanical equipment is often filled with lubricating oil or grease in order to solve the problem of lubrication between a bearing and a shaft. Along with the extension of equipment live time, shaft end wearing and tearing, vibration or sealing washer damage, ageing scheduling problem often appear, lead to the axle head to begin the oil impregnate then. The oil leakage of the equipment not only can cause the waste of energy, but also can cause the pollution of the use environment, and more importantly, the oil leakage of the equipment can also cause secondary disasters such as fire, explosion and the like, so that the oil leakage phenomenon at the shaft end needs to be specially managed.

At present, a commonly adopted method for solving the problem of oil leakage at the shaft end is to replace a sealing ring at the oil leakage position in a bearing end cover. When changing the sealing washer in the bearing end cover, need demolish the mechanism adjacent with the bearing end cover, maintenance duration is long, and carries out the overhaul to equipment because of the oil blanket oil impregnate, can cause the very big waste of fund and manpower, so solve the change convenience problem of sealing washer very necessary.

In addition, when a shaft mounted on a machine is filled with lubricating oil or grease, there is a problem that the filling of the lubricating oil or grease on the shaft is not uniform. Further, the lubricating oil or grease is often thrown out at a place where the lubricating oil or grease is concentrated as the shaft rotates, and not only the lubricating function is not performed, but also leakage of the lubricating oil or grease is increased. Therefore, it is also necessary to solve the problem of the uniformity of the filling of the lubricating oil or grease.

Disclosure of Invention

The utility model discloses to the big, the long problem of maintenance duration of the degree of difficulty of the bearing cap of installing on mechanical equipment when changing its inside sealing washer, provide the bearing cap subassembly of a brand-new structure to improve the convenience that the sealing washer was changed.

In order to achieve the purpose of the invention, the utility model adopts the following technical scheme to realize:

a bearing end cap assembly comprising a first end cap and a second end cap; the first end cover is of a stepped annular structure, an opening area in the center of the first end cover is a shaft hole and is used for being coaxially assembled with a shaft, at least one circle of groove is formed on the inner side surface, facing the shaft hole, of the first end cover, a sealing element and an oil injection ring are installed in the groove, and when the sealing element and the oil injection ring are installed in the shaft hole, the sealing element and the oil injection ring are coaxially assembled with the shaft and are used for sealing the shaft; a through hole is formed in the outer side surface of the first end cover and communicated with the oil injection ring;

the second end cover is of a stepped annular split structure and is arranged on the first end cover; the subdivision structure is subdivided along the radial direction of the subdivision structure to form two stepped semi-circular structures; the central opening area of the second end cover is an axle hole, is coaxial and equal in diameter with the axle hole of the first end cover and is used for being coaxially assembled with the axle; at least two circles of grooves which are sequentially arranged along the axial direction of the shaft hole are formed on the inner side surface of the second end cover facing the shaft hole, the grooves adjacent to the first end cover are used for installing the first end cover, and sealing elements used for shaft sealing are installed in the rest grooves.

In some embodiments of the present application, the first end cap is preferably designed as a two-step ring structure, and includes a first upper ring cap and a first lower ring cap, and an outer diameter of the first upper ring cap is smaller than an outer diameter of the first lower ring cap.

In some embodiments of the present application, a ring of the grooves is formed on the inner side surface of the first upper ring cover facing the shaft hole, the ring is defined as a first groove, a first sealing member and the oil injection ring are installed in the first groove, and the through hole is opened on the outer side surface of the first upper ring cover; a circle of grooves formed on the inner side surface of the first lower ring cover facing the shaft hole are defined as second grooves, and second sealing elements are mounted in the second grooves; the first sealing element, the second sealing element and the oil injection ring are coaxially assembled with the shaft, so that two-stage sealing of the shaft is realized.

In some embodiments of the present application, it is preferred that the oil filler ring is disposed between the first seal and the second seal for axial positioning of the first seal and the second seal. Therefore, when lubricating oil or lubricating grease is filled at the oil filling ring, the first sealing element and the second sealing element are arranged on two sides of the oil filling ring, so that the first sealing element and the second sealing element can be better sealed, and the leakage of the lubricating oil is reduced.

In some embodiments of the present application, the oil filler ring may include a first ring, a second ring, and an arcuate portion; the first ring is adjacent to the first seal; the second ring is adjacent to the second seal; the first ring and the second ring are positioned in parallel at intervals along the axial direction of the shaft hole of the first end cover; the arc-shaped part is connected between the first ring and the second ring, the inner diameter of the arc-shaped part is the same as the inner diameter of the first ring, and the outer diameter of the arc-shaped part is smaller than the outer diameter of the first ring; the central angle of the arc-shaped part is 45-60 degrees; the arc-shaped parts are preferably arranged in a plurality and are uniformly distributed at intervals along the circumferential direction. Through the setting of oiling ring, can utilize the rotation of axle relative to oiling ring to carry out circumference to the lubricating oil or the grease of filling and paint for lubricating oil or grease can paint on the surface of axle uniformly, then solved the inhomogeneous problem of lubricating oil or grease filling, reduced because the uneven lubricating oil or the grease that cause of filling concentrates, thereby be thrown away at rotatory in-process easily, then cause the condition of lubricating oil or grease leakage to take place.

In some embodiments of the present application, the second end cap is preferably designed as a two-step annular split structure, and includes a second upper ring cap and a second lower ring cap, and the outer diameter of the second upper ring cap is smaller than that of the second lower ring cap; a circle of grooves are formed in the inner side face, facing the shaft hole, of the second upper ring cover, and are defined as third grooves, and third sealing elements are installed in the third grooves; and a circle of grooves are formed on the inner side surface of the second lower ring cover facing the shaft hole and are defined as fourth grooves, and the fourth grooves are used for assembling the first upper ring cover of the first end cover. By adopting the structural design, when the oil leakage problem occurs at the bearing end cover assembly, the oil leakage problem can be quickly solved by adopting a mode of dismantling the second end cover and replacing the third sealing element therein. Because the second end cover adopts the design of split structure, consequently can dismantle it under the condition of not removing other parts of equipment, solved the problem of sealing washer change convenience then.

In some embodiments of the present application, the second lower ring cap is further provided with an oil filling through hole, when the first upper ring cap of the first end cap is assembled into the fourth groove of the second end cap, the oil filling through hole is communicated with the through hole provided in the first end cap, and lubricating oil can be filled into the oil filling ring through the oil filling through hole and the through hole provided in the first end cap.

In some embodiments of the present application, an oil filling pipe is further provided in the bearing end cap assembly, and is fitted in the oil filling through hole, and the oil filling ring is filled with oil through the oil filling through hole and a through hole provided in the first end cap. Through setting up the oiling pipe, can improve lubricating oil or lubricating grease filling's precision and convenience.

In some embodiments of the present application, it is preferable that two sets of assembly holes are formed in the first end cover, which are a first set of assembly holes and a second set of assembly holes, respectively, and screws are installed in the first set of assembly holes for threadedly connecting the first end cover to a device on which the shaft is installed; and a set of assembly holes are formed in the second end cover, screws are installed in the assembly holes, and the screws are in threaded connection with the second set of assembly holes of the first end cover to realize the threaded connection of the first end cover, the second end cover and the shaft.

In some embodiments of the present application, in order to facilitate the installation and fixation of the first end cover and the second end cover on the device, the first set of assembly holes are preferably opened on the first upper ring cover of the first end cover; the second group of assembling holes are formed in a first lower ring cover of the first end cover; and opening the assembly hole on the second end cover on the second lower ring cover of the second end cover.

Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses a bearing end cover subassembly adopts two end cover combinations to form, forms multistage sealed form to the axle seal effect has been strengthened. By designing the second end cap in the bearing end cap assembly as a split structure, the second end cap can be easily detached from the shaft to replace the seal therein without removing other components on the device. The structural design improves the convenience of replacing the sealing element, the problem of oil leakage at the shaft end can be solved by replacing the sealing element in the second end cover, time and labor are saved, and the maintenance efficiency is greatly improved.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of an overall construction of one embodiment of a bearing end cap assembly according to the present invention;

FIG. 2 is a cross-sectional view of the bearing cap assembly shown in FIG. 1 mounted on a shaft;

FIG. 3 is a schematic structural view of an embodiment of the filler ring of FIG. 2;

FIG. 4 is a schematic view of the bearing cap assembly of FIG. 1 in use mounted on a fixture.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that in the description of the present invention, the terms "mounted" and "connected" should be interpreted broadly unless explicitly stated or limited otherwise. For example, it may be a fixed connection, a detachable connection or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to achieve the purpose of conveniently replacing the shaft sealing element, the detachability and maintainability of the bearing end cover are considered emphatically on the design thinking; in structural design, a double-layer end cover and a multi-stage sealing structure are adopted, the sealing performance of the bearing end cover is improved, and the outer-layer end cover is of a split structure and is convenient to detach and install.

Referring to fig. 1 and 2, the bearing cap assembly of the present embodiment includes a first cap 10 and a second cap 20. The first end cap 10 is a stepped ring structure, and the ring structure is an integral structure. The second end cap 20 has a stepped annular split structure, and the split form is a split along an annular radial direction, thereby forming two stepped semi-annular structures.

In the present embodiment, as shown in fig. 2, the first end cap 10 is preferably designed as a two-step ring structure, and includes a first upper ring cap 11 and a first lower ring cap 12, wherein the diameter of the first upper ring cap 11 is smaller than that of the second lower ring cap 12. The first end cap 10 has a central shaft hole 13, and the inner side surface of the first end cap 10 facing the shaft hole 13 has at least one circle of grooves, which are defined as a first groove and a second groove in this embodiment by taking two circles of grooves as an example. Wherein a first seal 14 and a filler ring 15 are mounted in the first groove, a second seal 16 is mounted in the second groove, and the first seal 14 and the second seal 16 are axially positioned by the filler ring 15. The first seal member 14, the second seal member 16 and the filler ring 15 are coaxially assembled with the shaft 30 to cooperatively effect a seal against the shaft 30. A through hole 17 is formed in the outer side surface of the first upper ring cover 11, the through hole 17 is communicated with the oil injection ring 15, and oil can be injected into the oil injection ring 15 through the through hole 17.

In the present embodiment, as shown in fig. 3, the filler ring 15 includes a first ring 151, a second ring 152, and an arcuate portion 153; the first ring 151 is adjacent the first seal 14, the second ring 152 is adjacent the second seal 16, and the first ring 151 and the second ring 152 are positioned in parallel spaced relation along the axial direction of the first end cap shaft bore 13. Typically, the first ring 151 and the second ring 152 have the same structural shape, and the arc portion 153 connects the first ring 151 and the second ring 152 and is located between the first ring 151 and the second ring 152. The arcuate portion 153 is provided to uniformly apply the lubricating oil filled in the oil filler ring 15 to the surface of the shaft 30, thereby achieving a better lubricating effect. Meanwhile, the concentrated lubricating oil which is not smeared can be prevented from being thrown out by the shaft 30 in the high-speed rotating process, and the possibility of lubricating oil leakage is increased.

As a preferred embodiment, a plurality of arc portions 153 may be disposed between the first ring 151 and the second ring 152, and the arc portions 153 are preferably uniformly arranged at equal intervals in the circumferential direction. The inner diameter of the arc-shaped portion 153 is designed to be equal to the inner diameters of the first ring 151 and the second ring 152, the outer diameter is smaller than the outer diameters of the first ring 151 and the second ring 152, and the central angle of each arc-shaped portion 153 can be 45-60 degrees.

Of course, instead of the arc-shaped portion 153, a ring-shaped structure may be disposed between the first ring 151 and the second ring 152. The inner diameter of the annular structure is designed to be equal to the inner diameters of the first ring 151 and the second ring 152, the outer diameter is designed to be smaller than the outer diameters of the first ring 151 and the second ring 152, and the annular structure is provided with a plurality of through grooves or through holes so that filled lubricating oil or lubricating grease can flow into the surface of the shaft through the through grooves or through holes. Thus, during the rotation of the shaft, the part of the annular structure with the non-through grooves or the through holes can smear the lubricating oil or the lubricating grease flowing into the surface of the shaft, so that the lubricating oil or the lubricating grease can be uniformly adhered to the surface of the shaft, the sufficient lubrication between the shaft and the bearing end cover assembly is realized, and the friction force is reduced.

In the present embodiment, as shown in fig. 1 and fig. 2, the second end cap 20 is preferably designed to have a two-step annular split structure, the central opening area is a shaft hole 23, and the diameter of the shaft hole 23 of the second end cap is equal to the diameter of the shaft hole 13 of the first end cap. The second end cover 20 comprises a second upper ring cover 21 and a second lower ring cover 22, the outer diameter of the second upper ring cover 21 is smaller than the outer diameter of the second lower ring cover 22, the second upper ring cover 21 and the second lower ring cover 22 are split into two semicircular annular structures along the diameter direction, and the split structures are favorable for disassembly.

For example, as shown in fig. 4, in a field bridge and a shore bridge device, a motor drives a cart travelling mechanism 60 to travel through a reduction gearbox 70. The reduction gearbox 70 is connected with the cart travelling mechanism 60 through a shaft 30. Bearing caps are required to be installed where the shaft 30 extends out of the reduction gearbox 70. Traditional bearing end cover is whole ring form, when the oil leak problem takes place for bearing end cover's position, need pull down reducing gear box 70 or cart running gear 60, just can take off bearing end cover and change sealing member wherein, therefore maintenance duration is very long, needs extravagant a large amount of manpower and materials. After the bearing end cover assembly of the embodiment is adopted, because the second end cover 20 of the bearing end cover assembly is of the split structure, when the bearing end cover assembly is disassembled and maintained, other parts are not disassembled, and only the two split structures of the second end cover 20 along the radial direction are respectively disassembled to replace the sealing element (of course, the sealing element is also of the split structure), so that the operation is simple, the sealing element is convenient to replace, the time and the labor are saved, and the maintenance efficiency can be obviously improved.

In this embodiment, at least one ring of grooves may be formed on the inner side surfaces of the second upper ring cover 21 and the second lower ring cover 22 of the second end cover 20 facing the shaft hole 23, and the ring of grooves formed on the inner side surfaces of the second upper ring cover 21 and the second lower ring cover 22 are defined as a third groove and a fourth groove, respectively. Wherein, be equipped with third sealing member 24 in the third slot, when third sealing member 24 appears damaging, oil leak scheduling problem, can directly dismantle second end cover 20, change third sealing member 24, realize the solution to bearing end cover subassembly oil leak problem. The fourth groove is for fitting the first upper ring cap 11 of the first end cap 10. The outer side surface of the second lower ring cover 22 is provided with an oil injection through hole 25, when the first upper ring cover 11 of the first end cover 10 is assembled in the fourth groove of the second end cover 20, the oil injection through hole 25 is just communicated with the through hole 17 formed in the first end cover 10, the oil injection pipe 40 is arranged in the oil injection through hole 25, lubricating oil or lubricating grease is injected through the oil injection pipe 40, and the lubricating oil or the lubricating grease enters the oil injection ring 15 through the through hole 17 formed in the first end cover 10, so that oil injection is realized.

In this embodiment, in order to fix the bearing cap assembly on the device 50, one set of screws may be used to fix the first cap 10 on the device 50 where the shaft 30 is installed, and another set of screws may be used to fix the second cap 20 on the first cap 10. Specifically, a first set of mounting holes may be formed in the first upper ring cover 11 of the first end cover 10, a first set of screws 19 may be installed in the first set of mounting holes, and the first end cover 10 may be screwed to the device 50 by the screws 19. A second set of assembly holes 19 are formed in the first lower ring cover 12 of the first end cover 10, and the assembly holes 19 are preferably threaded holes; and a set of mounting holes 26 are also formed in the second lower ring cover 22 of the second end cover 20, and the mounting holes 26 may be threaded holes or unthreaded holes. A second set of screws 27 are installed in the assembly holes 26 of the second lower ring cover 22 and threadedly coupled with the second set of assembly holes 18 of the first lower ring cover 12, thereby fixing the second end cap 20 to the first end cap 10.

In the present embodiment, the first sealing element 14, the second sealing element 16 and the third sealing element 24 may be sealing rings or framework oil seals, and fig. 2 shows an assembly structure using framework oil seals in the bearing end cover assembly.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims (10)

1. A bearing end cap assembly, comprising:

the first end cover is of a stepped annular structure, the opening area of the center of the first end cover is a shaft hole and is used for being coaxially assembled with a shaft, at least one circle of groove is formed on the inner side surface, facing the shaft hole, of the first end cover, a sealing element and an oil injection ring are installed in the groove, and when the shaft is installed in the shaft hole, the sealing element and the oil injection ring are coaxially assembled with the shaft and are used for sealing the shaft; a through hole is formed in the outer side surface of the first end cover and communicated with the oil injection ring;

the second end cover is of a stepped annular split structure and is arranged on the first end cover; the subdivision structure is subdivided along the radial direction of the subdivision structure to form two stepped semi-circular structures; the central opening area of the second end cover is an axle hole, is coaxial and equal in diameter with the axle hole of the first end cover and is used for being coaxially assembled with the axle; at least two circles of grooves which are sequentially arranged along the axial direction of the shaft hole are formed on the inner side surface of the second end cover facing the shaft hole, the grooves adjacent to the first end cover are used for installing the first end cover, and sealing elements used for shaft sealing are installed in the rest grooves.

2. The bearing end cap assembly of claim 1 wherein said first end cap is a two step ring structure comprising a first upper ring cap and a first lower ring cap, said first upper ring cap having an outer diameter less than an outer diameter of said first lower ring cap.

3. The bearing end cap assembly of claim 2,

a circle of grooves are formed in the inner side face, facing the shaft hole, of the first upper ring cover and are defined as first grooves, a first sealing element and the oil injection ring are mounted in the first grooves, and the through holes are formed in the outer side face of the first upper ring cover;

and a circle of groove formed on the inner side surface of the first lower ring cover facing the shaft hole is defined as a second groove, and a second sealing element is arranged in the second groove.

4. The bearing end cap assembly of claim 3 wherein said oil filler ring is located between said first seal and said second seal for axial positioning of said first seal and said second seal.

5. The bearing end cap assembly of claim 4 wherein said oil filler ring comprises:

a first ring adjacent to the first seal;

a second ring adjacent to the second seal; the first ring and the second ring are positioned in parallel at intervals along the axial direction of the shaft hole of the first end cover;

an arc-shaped portion connected between the first ring and the second ring, having an inner diameter identical to an inner diameter of the first ring and an outer diameter smaller than an outer diameter of the first ring; the central angle of the arc-shaped part is 45-60 degrees; the arc portion includes a plurality ofly, along the even distribution of circumference interval.

6. The bearing end cap assembly of any one of claims 2-5, wherein the second end cap is a two-step annular split structure comprising a second upper ring cap and a second lower ring cap, the second upper ring cap having an outer diameter smaller than an outer diameter of the second lower ring cap; a circle of grooves are formed in the inner side face, facing the shaft hole, of the second upper ring cover, and are defined as third grooves, and third sealing elements are installed in the third grooves; and a circle of grooves are formed on the inner side surface of the second lower ring cover facing the shaft hole and are defined as fourth grooves, and the fourth grooves are used for assembling the first upper ring cover of the first end cover.

7. The bearing end cap assembly of claim 6, wherein an oil feed through hole is formed in the second lower ring cap, the oil feed through hole communicating with the through hole formed in the first end cap when the first upper ring cap of the first end cap is fitted into the fourth groove of the second end cap.

8. The bearing end cap assembly of claim 7 further comprising an oil filler pipe fitted in said oil filler through hole for injecting oil to said oil filler ring.

9. The end cap assembly of claim 6, wherein the first end cap defines two sets of mounting holes, a first set of mounting holes and a second set of mounting holes, wherein the first set of mounting holes have screws received therein for threadably connecting the first end cap to a device to which the shaft is mounted;

and a group of assembly holes are formed in the second end cover, screws are installed in the assembly holes, and the screws are in threaded connection with the second group of assembly holes of the first end cover.

10. The bearing end cap assembly of claim 9, wherein said first set of assembly holes are formed in a first upper ring cap of said first end cap; the second group of assembling holes are formed in the first lower ring cover of the first end cover; and the assembly hole on the second end cover is formed in the second lower ring cover of the second end cover.

Images