Bearing seat assembly for carrier roller and carrier roller body

Abstract

The utility model discloses a bearing seat assembly for a carrier roller and a carrier roller body, which have higher sealing performance and can effectively avoid invasion and pollution of dust or moisture. The utility model comprises a pipe body made of a steel pipe material or a polymer composite material, a steel shaft, two bearing seat assemblies, two shaft check rings, a lip-type sealing ring and a lip-type sealing ring which are assembled. And meanwhile, according to the use requirements, the rubber ring bodies can be selected to be sleeved on the carrier rollers, so that the vibration resistance and buffering effects are enhanced. The bearing seat assembly comprises a plurality of parts and structures, including a bearing, an assembly structure of the bearing, a plurality of sealing elements, an assembly structure and the like, and the bearing seat assembly can realize a plurality of main functions required by the carrier roller, such as rotation, sealing, positioning and the like. Meanwhile, due to the fact that the bearing seat assembly is provided with a more closed internal structure, the main functions are improved to a large extent, and the service life of internal parts and the service life of the bearing seat assembly are effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of conveying machinery, concretely is the technical field of carrier roller bearing seat, and relates to a bearing seat assembly and carrier roller body for carrier roller. BACKGROUND

[0002] The pavement milling machine is applied more and more in road construction, and one important function is to collect and transport the road material milled by the conveyor belt (machine). The conveyor is provided with various carrier rollers, and the carrier rollers are applied a lot in construction.

[0003] The logistics collected and transported by the pavement milling machine is milled from the ground at high speed, and a large amount of dust is included, especially the cutting of the concrete pavement. The dust surrounds the conveyor and the carrier roller, so that a large amount of dust invades and pollutes the carrier roller and the bearing chamber. In addition, in order to reduce dust and flush the conveyor, the carrier roller is flushed by low-pressure or high-pressure water flow, so that a large amount of water invades and pollutes the carrier roller and the bearing chamber. Other similar environments include a working environment with a large amount of dust and powder; a working environment with a large amount of water; and an open outdoor working environment.

[0004] The carrier roller working in the above-mentioned environment should have high sealing performance and maintainability, and the purpose of the utility model is to improve the sealing performance and maintainability of the carrier roller. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above-mentioned technical problem, the utility model provides a bearing seat assembly and carrier roller body for carrier roller, which is more suitable for working in a working environment with a large amount of dust or water, has higher sealing performance, and can effectively avoid the invasion and pollution of dust or water.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A bearing seat assembly for carrier roller is composed of a bearing base, a bearing, a sealing cover, an inner-lip seal, a shaft sleeve, a labyrinth sealing cover and an outer-lip seal.

[0008] The bearing is installed at the bottom of the bearing base, the sealing cover is tightly close to the outer ring of the bearing, and the bearing, the sealing cover and the bearing base form an interference fit.

[0009] The shaft sleeve penetrates the through hole I of the sealing cover, the bearing and the bearing base in sequence, wherein the shaft sleeve forms an interference fit with the bearing, and the shaft sleeve forms a clearance fit with the sealing cover and the bearing base.

[0010] The inner-lip seal is installed between the shaft sleeve and the sealing cover.

[0011] The labyrinth seal cover is mounted on the bearing base and forms an interference fit with the bearing base; and is pressed and sealed on the shaft sleeve to form a labyrinth seal with the shaft sleeve.

[0012] The outer lip seal is mounted on the periphery of the labyrinth seal cover.

[0013] Further, the bearing base is a pot-shaped structure, a through hole I is arranged at the center of the bottom of the bearing base, an inner wall of the bearing base is provided with a through diameter section I and a through diameter section II, the diameter of the through diameter section I is greater than that of the through diameter section II; a limiting step I is arranged at the joint of the through diameter section I and the through diameter section II, and a limiting step II is arranged at the joint of the through diameter section II and the bottom of the bearing base.

[0014] The labyrinth seal cover is interference fitted in the through diameter section I and the bearing, and the seal cover is interference fitted in the through diameter section II; an embedded groove type boss is arranged outside the port of the bearing base.

[0015] Further, the bearing is positioned on the limiting step II.

[0016] Further, the seal cover is an outwardly protruding ring-shaped structure, and the cross section of the seal cover is L-shaped on both sides.

[0017] Further, the shaft sleeve is a stepped pipe structure, specifically including a steel shaft assembly inner hole, a bearing assembly section, an inner seal assembly section, a circular end seat, and a labyrinth seal protruding ring system, wherein the bearing assembly section, the inner seal assembly section, and the circular end seat form a three-level boss.

[0018] The limiting step III is arranged at the joint of the bearing assembly section and the inner seal assembly section, and the limiting step IV is arranged at the joint of the inner seal assembly section and the circular end seat.

[0019] The labyrinth seal protruding ring system includes at least two concentric protruding ring systems.

[0020] Further, the limiting step III of the shaft sleeve abuts against the inner ring of the bearing; the bearing assembly section of the shaft sleeve forms an interference fit with the bearing; the bearing assembly section of the shaft sleeve forms a clearance fit with the through hole I of the bearing base; the circular end seat of the shaft sleeve forms a clearance fit with the through diameter section II of the bearing base; and the inner seal assembly section of the shaft sleeve forms a clearance fit with the seal cover.

[0021] Further, the inner lip seal is a single-sided lip seal, including a lip I and an elastomer; the lip I is in contact with the seal cover, and the elastomer is mounted on the inner seal assembly section of the shaft sleeve and positioned by the limiting step IV.

[0022] Further, the labyrinth seal cover comprises an outer ring, an inner hole II and a labyrinth seal groove ring system; the outer ring of the labyrinth seal cover is pressed and sealed on the circular end seat of the shaft sleeve, is positioned by the limiting step I and is installed at the drift diameter section I of the bearing base to form an interference fit with the bearing base.

[0023] Further, the labyrinth seal groove ring system comprises a concentric groove ring matched with the labyrinth seal convex ring system; the labyrinth seal groove ring system forms a labyrinth seal with the labyrinth seal convex ring system.

[0024] Further, the outer lip seal comprises a bone ring and a lip II, the bone ring has a certain elasticity, is installed at the periphery of the inner hole II of the labyrinth seal cover and the lip II has elasticity and is attached to the outer end surface of the labyrinth seal cover.

[0025] Further, a carrier roller body comprises a hollow pipe body and a steel shaft, characterized in that it further comprises the bearing base assembly described above; the bearing base assembly is symmetrically installed at both ends of the hollow pipe body and the steel shaft is installed on the bearing base assembly.

[0026] Further, the pipe body is connected in the bearing base embedded groove boss of the bearing base assembly and the main body of the bearing base assembly is installed inside the pipe body; the steel shaft penetrates through the shaft sleeve, the labyrinth seal cover and the outer lip seal of the bearing base assembly and is assembled on the bearing base assembly through an interference fit.

[0027] Further, each of the two ends of the steel shaft has a groove I and a groove II; the outer lip seal of the bearing base assembly is placed in the groove I; the groove II is used for positioning, fixing and retaining the shaft sleeve.

[0028] Further, the retaining ring is abutted against the circular end seat of the shaft sleeve.

[0029] Further, the outer wall of the hollow pipe body is sleeved with a buffer ring.

[0030] The significance of the independent bearing base assembly lies in that the bearing base assembly is arranged and assembled on the whole carrier roller as a whole component formed through pre-assembly; the bearing base assembly integrates multiple main functions such as rotation, sealing and positioning in itself; the bearing base assembly bears various part damages and functional failures that first occur in the practical links of the carrier roller, timely maintenance and replacement can ensure that the damages and failures cannot be transmitted to other components of the carrier roller. The bearing base assembly can be maintained and replaced as a whole and meanwhile individual maintenance and replacement of the components can be performed. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the bearing base assembly;

[0032] Figure 2 It is a structural schematic diagram of the bearing base.

[0033] Figure 3 is a side view of the bearing seat;

[0034] Figure 4 is a structural diagram of the sealing cover;

[0035] Figure 5 is a side view of the sealing cover;

[0036] Figure 6 is a structural diagram of the shaft sleeve;

[0037] Figure 7 is a side view of the shaft sleeve;

[0038] Figure 8 is a structural diagram of the inner lip seal;

[0039] Figure 9 is a structural diagram of the labyrinth sealing cover;

[0040] Figure 10 is a side view of the labyrinth sealing cover;

[0041] Figure 11 is a structural diagram of the outer lip seal;

[0042] Figure 12 is a schematic view of the carrier roller body;

[0043] Figure 13 is a side view of the carrier roller body;

[0044] Figure 14 is a structural diagram of the carrier roller body;

[0045] Figure 15 is a schematic view of the steel shaft;

[0046] Figure 16 is a schematic view of the installation of the outer lip seal and the retainer ring. DETAILED DESCRIPTION

[0047] The traditional carrier roller is composed of a tube body, a steel shaft, a bearing seat, a bearing, a sealing member, a clamp spring and other elements, which are sequentially assembled into a finished product through welding and assembly, and all elements are related to and affect each other. The utility model changes the traditional carrier roller composition form, forms an independent assembly by setting a pre-assembled integrated bearing seat assembly, and realizes and exhibits the main function requirements and fault points of the carrier roller on the bearing seat assembly.

[0048] The bearing seat assembly, as an independent assembly, contains bearings and necessary sealing members that need to be sealed and lubricated. The bearings and the sealing members are easily assembled in this compact and comprehensive combination, and the functions of sealing and rotation are realized and strengthened.

[0049] As Figure 1 shown, the bearing seat assembly a is composed of a bearing base 1, a bearing 8, a sealing cover 2, an inner lip seal 3, a shaft sleeve 4, a labyrinth sealing cover 6, and an outer lip seal 7 as an independent combined component. The bearing seat assembly a has multiple functions such as rotation, sealing, positioning, etc. These functions are realized and ensured within the bearing seat assembly a itself, and are not affected by errors and differences of other related components of the superior product. At the same time, the performance failure of rotation and sealing caused by wear and pollution of the bearing seat assembly due to long-term use is exhibited within the bearing seat assembly, and does not have harmful effects on other related components. The bearing seat assembly a can be used as a pre-assembled combined component in the use of rotating components such as a carrier roller, and is assembled as a whole on the carrier roller or other components. At the same time, the bearing seat assembly can be replaced and repaired as a whole.

[0050] The bearing base 1 is a can-shaped structure processed from a high polymer composite material, and a through hole I1-1 allowing the shaft sleeve 4 to pass through is formed at the center of the bottom of the bearing base 1. A through diameter section I1-2 is provided at the opening of the bearing base 1, and a through diameter section II1-3 is provided from the through diameter section I1-2 to the bottom of the bearing base 1. The diameter of the through diameter section I1-2 is larger than that of the through diameter section II1-3, and they are in a stepped shape. A limiting step I1-4 for positioning the labyrinth end cover is formed at the joint of the through diameter section I1-2 and the through diameter section II1-3, and a limiting step II1-5 for positioning the outer ring of the bearing is formed at the joint of the through diameter section II1-3 and the bottom of the bearing base 1. The through diameter section I1-2, the through diameter section II1-3, the limiting step I1-4, and the limiting step II1-5 are precisely processed to meet the requirements of interference assembly of the labyrinth sealing cover 6 in the through diameter section I1-2 and interference assembly of the bearing 8 in the through diameter section II1-3. An embedded groove type boss 1-6 is provided outside the port of the bearing base 1 for connecting with the pipe body of the carrier roller.

[0051] The bearing 8 is installed in the through diameter section II1-3 of the bearing base 1 and is positioned on the limiting step II1-5 to form an interference fit with the bearing base 1. In this embodiment, a standard bearing available on the market is selected for the bearing to reduce friction between rotating components, improve mechanical efficiency, prolong the service life of mechanical equipment, and reduce maintenance costs.

[0052] As Figure 2 and 3 shown, the sealing cover 2 is an annular structure with an outwardly protruding ring shape, and the cross section of the sealing cover 2 is in an L shape. The sealing cover 2 is installed in the through diameter section II1-3 of the bearing base 1 and abuts against the outer ring of the bearing 8 to form an interference fit with the bearing base 1.

[0053] As Figure 4 and 5As shown, the shaft sleeve 4 is a stepped pipe structure processed from a polymer composite material, and the specific structure is a three-diameter-specification boss, which looks like a tooth-like structure at the left end in cross section. It specifically includes a steel shaft assembly inner hole 4-1, a bearing assembly section 4-2, an inner sealing assembly section 4-3, a limiting step III 4-4 for positioning the inner ring of the bearing, a circular end seat 4-5, a limiting step IV 4-6 for positioning the inner lip seal, and a labyrinth seal boss ring system 4-7. The bearing assembly section 4-2, the inner sealing assembly section 4-3, and the circular end seat 4-5 form a three-stage boss. The limiting step III 4-4 for positioning the inner ring of the bearing is at the junction of the bearing assembly section 4-2 and the inner sealing assembly section 4-3, and the limiting step IV 4-6 for positioning the inner lip seal is at the junction of the inner sealing assembly section 4-3 and the circular end seat 4-5. The labyrinth seal boss ring system 4-7 includes two or more concentric boss rings 4-8. The shaft sleeve 4 penetrates the through hole I1-1 of the sealing cover 2, the bearing 8, and the bearing base 1 in sequence, the limiting step III 4-4 abuts against the inner ring of the bearing 8 to position the bearing 8, and the bearing assembly section 4-2 of the shaft sleeve 4 forms an interference fit with the bearing 8; the bearing assembly section 4-2 of the shaft sleeve 4 forms a clearance fit with the through hole I1-1 of the bearing base 1 to avoid wear between the two when the bearing base 1 rotates; the inner sealing assembly section 4-3 of the shaft sleeve 4 forms a clearance fit with the sealing cover 2 to avoid friction between the sealing cover 2 and the shaft sleeve 4 when the bearing base 1 rotates, thereby avoiding wear between the two; and the circular end seat 4-5 of the shaft sleeve 4 forms a clearance fit with the through diameter section II1-3 of the bearing base 1 to avoid wear between the two when the bearing base 1 rotates. The steel shaft assembly inner hole 4-1 of the shaft sleeve 4 is precisely processed to form an interference fit with the through steel shaft, thereby ensuring that there is no relative rotation and sliding displacement between the two, forming an integral body in a relative sense, and realizing a gapless seal between the two.

[0054] As shown in Figure 6 , the inner lip seal 3 is a single-sided lip seal, which includes a lip I3-1 and an elastomer 3-2, and is installed at the limiting step IV 4-6 of the shaft sleeve 4. The lip I3-1 contacts the sealing cover 2, and the elastomer 3-2 is installed on the inner sealing assembly section 4-3 of the shaft sleeve 4 and is positioned by the limiting step IV 4-6. In this embodiment, the inner lip seal is a standard commercially available part.

[0055] As shown in Figure 7 and 8As shown, the labyrinth seal cover 6 is made of a high polymer composite material, including an outer ring 6-1, an inner hole II 6-2 allowing the steel shaft to pass through, and a labyrinth seal groove ring system 6-3. The outer ring is precisely processed to meet the interference fit of the labyrinth seal cover 6 on the drift diameter section I1-2 of the bearing base 1, to ensure that there is no relative rotation and sliding displacement between the two, forming an integrated body in the relative sense, while realizing the gapless sealing between the two. The labyrinth seal groove ring system 6-3 includes concentric groove rings matched with the labyrinth seal protruding ring system 4-7. When assembled, the outer ring 6-1 of the labyrinth seal cover 6 is pressed and sealed on the circular end seat 4-5 of the shaft sleeve 4, positioned by the limiting step I1-4, and installed at the drift diameter section I1-2 of the bearing base 1, forming an interference fit with the bearing base 1. The inner hole II 6-2 of the labyrinth seal cover 6 forms a gap fit with the steel shaft passing through it. In order to facilitate the disassembly of the labyrinth seal cover 6, the end face of the labyrinth seal cover 6 is provided with a hook groove, and by inserting a suitable tool into the disassembly hook groove, it is convenient to disassemble it from the bearing base 1, and then clean the labyrinth part of foreign matter and replace the parts.

[0056] The traditional labyrinth seal is composed of two parts with protruding ring systems and groove ring systems respectively, and the two parts are in contact at the bottom end, which increases the rotational resistance and mutual wear. The labyrinth seal groove ring system of the labyrinth seal cover of the utility model and the labyrinth seal protruding ring system nested in the shaft sleeve are independently positioned and do not contact each other, and are matched and assembled with uniform gaps, so that the efficiency of the labyrinth seal is achieved, the additional labyrinth seal ring part is replaced, and the rotational resistance caused by the contact rotation between the two parts is avoided.

[0057] As shown in the figure, Figure 9 The outer lip seal 7 preliminarily seals the gap between the labyrinth seal cover 6 and the steel shaft. The outer lip seal 7 includes a bone ring 7-1 and a lip II 7-2, wherein the bone ring 7-1 has a certain elasticity and is locked on the steel shaft; the lip II 7-2 has elasticity and is attached to the outer end face of the labyrinth seal cover 6, and achieves the sealing effect through elastic attachment, without causing great resistance to the relative rotation between the two.

[0058] The utility model separates the bearing 8, the seal cover 2, the inner lip seal 3 and the steel shaft by the shaft sleeve 4, avoids friction between the bearing 8, the seal cover 2, the inner lip seal 3 and the steel shaft due to rolling, vibration and other factors during work, and causes wear of each part.

[0059] The utility model adopts the design of double-lip seal, the outer lip seal 7 provides sealing for the labyrinth seal part, and the inner lip seal 3 specially provides sealing for the bearing, which greatly improves the sealing performance of the bearing seat and the whole roller, thereby prolonging the service life of the parts and the whole roller.

[0060] When one or more parts of the bearing seat assembly a are damaged or fail, the new bearing seat assembly a can be conveniently and quickly replaced, and the performance of the whole roller is quickly and effectively restored.

[0061] As shown in the drawings, Figure 10 and 11 The utility model also provides a roller body, which comprises the bearing seat assembly a, the hollow pipe body b and the steel shaft c.

[0062] The pipe body b of the roller body is connected in the embedded groove type boss 1-6 of the bearing base 1, and the bearing seat assembly a body is installed inside the pipe body b. The pipe body b is made of steel pipe or high polymer composite material, the inner wall of the pipe body b is assembled with the bearing base 1 of the bearing seat assembly a through interference fit, no relative rotation and sliding displacement are ensured between the pipe body b and the bearing base 1, and the pipe body b and the bearing base 1 are integrated in a relative sense, and no gap sealing is realized between the pipe body b and the bearing base 1. Meanwhile, according to the use requirement, a buffer ring can be selected to be sleeved on the outer wall of the pipe body c.

[0063] The steel shaft c penetrates the shaft sleeve 4, the labyrinth sealing cover 6 and the outer lip type sealing 7 of the bearing seat assembly a, is assembled on the bearing seat assembly a through interference fit, no relative rotation and sliding displacement are ensured between the steel shaft c and the bearing seat assembly a, and the steel shaft c and the bearing seat assembly a are integrated in a relative sense. No gap sealing is realized between the steel shaft c and the bearing seat assembly a. The steel shaft c is provided with the groove Ic-1 and the groove IIc-2 at two ends, the groove Ic-1 is used for placing and positioning and fixing the outer lip type sealing 7, the bone ring 7-1 is placed in the groove Ic-1, the outer lip type sealing 7 is placed in the groove Ic-1 and limits the position of the labyrinth sealing cover 6, prevents the labyrinth sealing cover 6 from being displaced and falling off due to excessive rotation of the roller, and prevents dust, water and other pollutants from entering the inside of the labyrinth sealing; the groove IIc-2 is used for placing and positioning and fixing the retaining ring 5; the retaining ring 5 abuts against the circular end seat 4-5 of the shaft sleeve 4.

[0064] When one or more parts of the bearing seat assembly a are damaged or fail due to long-term work of the roller body, the failed parts can be replaced one by one, or the bearing seat assembly a can be disassembled and replaced as a whole.

Claims

1. A bearing block assembly for an idler, characterized by, It is composed of bearing base (1), bearing (8), sealing cover (2), inner lip seal (3), shaft sleeve (4), labyrinth seal cover (6), outer lip seal (7); The bearing (8) is installed at the bottom of the bearing base (1), the sealing cover (2) is tightly closed on the outer ring of the bearing (8), and the bearing (8), the sealing cover (2) and the bearing base (1) form an interference fit; The shaft sleeve (4) penetrates the through hole I (1-1) of the sealing cover (2), the bearing (8) and the bearing base (1) in sequence, wherein the shaft sleeve (4) forms an interference fit with the bearing (8), and the shaft sleeve (4) forms a clearance fit with the sealing cover (2) and the bearing base (1); The inner lip seal (3) is installed between the shaft sleeve (4) and the sealing cover (2); The labyrinth seal cover (6) is installed on the bearing base (1) and forms an interference fit with the bearing base (1); and is pressed and sealed on the shaft sleeve (4) to form a labyrinth seal with the shaft sleeve (4); The outer lip seal (7) is installed on the periphery of the labyrinth seal cover (6).

2. A carrier roller bearing housing assembly according to claim 1, wherein, The bearing base (1) is a pot-shaped structure, a through hole I (1-1) is arranged at the center of the bottom of the bearing base (1), an inner wall of the bearing base (1) is provided with a through diameter section I (1-2) and a through diameter section II (1-3), the diameter of the through diameter section I (1-2) is greater than that of the through diameter section II (1-3); a limiting step I (1-4) is arranged at the joint of the through diameter section I (1-2) and the through diameter section II (1-3), and a limiting step II (1-5) is arranged at the joint of the through diameter section II (1-3) and the bottom of the bearing base (1); The labyrinth seal cover (6) is interference-fitted in the through diameter section I (1-2), the bearing (8) and the sealing cover (2) are interference-fitted in the through diameter section II (1-3); and an embedded groove type boss (1-6) is arranged outside the port of the bearing base (1).

3. A carrier roller bearing housing assembly according to claim 2, wherein, The bearing (8) is positioned on the limiting step II (1-5).

4. A carrier roller bearing housing assembly according to claim 1, wherein, The sealing cover (2) is an annular structure with an outwardly protruding extension, and the cross section of the sealing cover (2) has an L-shaped structure.

5. A carrier roller bearing housing assembly according to claim 1 wherein, The shaft sleeve (4) is a stepped pipe structure, specifically including a steel shaft assembly inner hole (4-1), a bearing assembly section (4-2), an inner seal assembly section (4-3), a circular end seat (4-5) and a labyrinth seal convex ring ring system (4-7), wherein the bearing assembly section (4-2), the inner seal assembly section (4-3) and the circular end seat (4-5) form three stepped bosses; The limiting step III (4-4) is arranged at the joint of the bearing assembly section (4-2) and the inner seal assembly section (4-3), and the limiting step IV (4-6) is arranged at the joint of the inner seal assembly section (4-3) and the circular end seat (4-5); The labyrinth seal convex ring ring system (4-7) includes at least two concentric convex ring rings (4-8).

6. A carrier roller bearing housing assembly according to claim 5, wherein, The limiting step III (4-4) of the shaft sleeve (4) abuts against the inner ring of the bearing (8); the bearing assembly section (4-2) forms an interference fit with the bearing (8); the bearing assembly section (4-2) of the shaft sleeve (4) forms a clearance fit with the through hole I (1-1) of the bearing seat (1); the circular end seat (4-5) of the shaft sleeve (4) forms a clearance fit with the through diameter section II (1-3) of the bearing seat (1); the inner sealing assembly section (4-3) of the shaft sleeve (4) forms a clearance fit with the sealing cover (2).

7. A carrier roller bearing housing assembly according to claim 5 wherein, The inner lip seal (3) is a single-sided lip seal, comprising a lip I (3-1) and an elastomer (3-2); the lip I (3-1) is in contact with the sealing cover (2), and the elastomer (3-2) is installed on the inner sealing assembly section (4-3) of the shaft sleeve (4) and positioned by the limiting step IV (4-6).

8. A carrier roller bearing housing assembly according to claim 1 wherein, The labyrinth sealing cover (6) comprises an outer ring (6-1), an inner hole II (6-2), and a labyrinth sealing groove ring system (6-3); the outer ring (6-1) of the labyrinth sealing cover (6) is pressed and sealed on the circular end seat (4-5) of the shaft sleeve (4) and positioned by the limiting step I (1-4), installed at the through diameter section I (1-2) of the bearing seat (1), and forms an interference fit with the bearing seat (1).

9. A carrier roller bearing housing assembly according to claim 8, wherein, The labyrinth sealing groove ring system (6-3) comprises a concentric groove ring matched with the labyrinth sealing convex ring system (4-7); the labyrinth sealing groove ring system (6-3) forms a labyrinth seal with the labyrinth sealing convex ring system (4-7).

10. A carrier roller bearing housing assembly according to claim 1 wherein, The outer lip seal (7) comprises a bone ring (7-1) and a lip II (7-2); the bone ring (7-1) has a certain elasticity and is installed on the periphery of the inner hole II (6-2) of the labyrinth sealing cover (6); the lip II (7-2) has elasticity and is attached to the outer end face of the labyrinth sealing cover (6).

11. A carrier roller body comprising a hollow tube (b), a steel shaft (c), characterized in that, It also comprises the bearing seat assembly (a) of any one of claims 1-10; the hollow pipe body (b) is symmetrically installed at both ends of the bearing seat assembly (a), and the steel shaft (c) is installed on the bearing seat assembly (a).

12. An idler body as claimed in claim 11, wherein The pipe body (b) is connected in the embedded groove type boss (1-6) of the bearing seat (1) of the bearing seat assembly (a), and the main body of the bearing seat assembly (a) is installed inside the pipe body (b); the steel shaft (c) penetrates through the shaft sleeve (4), the labyrinth sealing cover (6), and the outer lip seal (7) of the bearing seat assembly (a) and is assembled on the bearing seat assembly (a) by interference fit.

13. An idler body as claimed in claim 11, wherein Each end of the steel shaft (c) has a groove I (c-1) and a groove II (c-2); the outer lip seal (7) of the bearing seat assembly (a) is placed in the groove I (c-1); the groove II (c-2) is used to position, fix, and block the shaft sleeve (4).

14. An idler body according to claim 13, wherein, The blocking ring (5) abuts against the circular end seat (4-5) of the shaft sleeve (4).

15. An idler body as claimed in claim 11, wherein, The hollow pipe body (b) is sleeved with a buffer ring.

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