CN220844213U - Carrier roller for conveyor - Google Patents

Abstract

The utility model discloses a carrier roller for a conveyor, which comprises a carrier roller shaft, a carrier roller cylinder sleeved outside the carrier roller shaft and a bearing device arranged between the carrier roller shaft and the carrier roller cylinder; the roller shaft and the roller tube can rotate relatively; the support ring is annular, and the outer wall of the support ring is in butt joint with the inner wall of the carrier roller barrel. According to the utility model, the supporting ring is arranged in the supporting roller and is used for supporting the supporting roller, so that the bearing capacity of the supporting roller is improved.

Description

Carrier roller for conveyor

Technical Field

The utility model relates to the technical field of carrier rollers, in particular to a carrier roller for a conveyor.

Background

At present, the belt conveyor is used as continuous transportation equipment, and has the advantages of high efficiency, low energy consumption, low operation cost, safety, reliability and the like, so the belt conveyor is rapidly developed at home and abroad, and is mature and perfected day by day. The carrier roller device is a main component of the belt conveyor, is mainly used for supporting the weight of the conveying belt and the weight of materials, and achieves the effect that the materials can be stably conveyed by adjusting the deformation of different conveying belts. The carrier roller must be flexible and reliable in operation. The friction force between the conveyor belt and the carrier roller is reduced, and the service life of the conveyor belt accounting for more than 25% of the total cost of the conveyor is played a key role.

The existing carrier roller structure generally comprises a carrier roller cylinder and a carrier roller shaft arranged in the carrier roller cylinder, wherein two bearing seats are arranged between the carrier roller shaft and the carrier roller cylinder and are used for installing bearings. However, as the production scale is increased, the maximum conveying amount of the belt conveyor can reach 24000t/h. In order to meet the requirement of conveying capacity, the conventional carrier roller generally increases the shaft diameter of the carrier roller, and sometimes the requirement of bearing capacity cannot be met by increasing the shaft diameter of the carrier roller to 50 mm; the existing carrier roller tube is generally a plastic outer tube, has poor radial bearing capacity, and is easy to crack in the use process, so that the service life is short.

Disclosure of utility model

First, the technical problem to be solved

The utility model aims to solve the technical problem of providing a carrier roller for a conveyor, which is provided with a supporting ring in a carrier roller cylinder for supporting the carrier roller cylinder, so that the bearing capacity of the carrier roller cylinder is improved.

(II) technical scheme

The carrier roller for the conveyor comprises a carrier roller shaft, a carrier roller cylinder sleeved outside the carrier roller shaft and a bearing device arranged between the carrier roller shaft and the carrier roller cylinder; the roller shaft and the roller tube can rotate relatively; the support ring is annular, and the outer wall of the support ring is in butt joint with the inner wall of the carrier roller barrel, so that the support ring can do relative rotation movement along with the carrier roller barrel.

By adopting the scheme, the supporting ring is arranged in the carrier roller cylinder and is used for supporting the carrier roller cylinder, so that the bearing capacity of the carrier roller cylinder is improved; the arrangement of the bearing device can improve the smoothness of the relative rotation between the carrier roller cylinder and the carrier roller shaft; the rolling smoothness of the supporting roller is improved, so that the running efficiency of the conveyor is improved.

Further, the support ring comprises an inner ring part and an outer ring part which are coaxially arranged, and a connecting part connected between the inner ring part and the outer ring part; and a through hole for the carrier roller shaft to pass through is formed in the inner ring part, and the aperture of the through hole is larger than the shaft diameter of the carrier roller shaft.

Further, the connecting portion is provided with a plurality of grooves at intervals along the circumferential direction thereof at both ends in the axial direction.

Specifically, a plurality of reinforcing ribs are formed between two adjacent grooves, and the reinforcing ribs are uniformly distributed in the circumference; the two ends of the reinforcing rib are respectively connected with the inner ring part and the outer ring part, and the end surfaces between the two ends are connected with the connecting part; to increase the strength of the support ring, thereby increasing the support strength of the support ring; meanwhile, due to the arrangement of the grooves, the weight of the supporting ring can be reduced, and the production cost is reduced.

Further, the number of the supporting rings is two, and the supporting rings are arranged at intervals.

Further, the distance between the two supporting rings is 200mm.

By adopting the scheme, the two supporting rings are arranged at intervals, so that the whole carrier roller can uniformly bear the pressure applied to the surface of the carrier roller, stress peaks at individual positions are avoided, the probability of stress concentration is reduced, the service life is greatly prolonged, and meanwhile, the carrier roller can be stable under the working conditions of continuous high-speed operation and strong corrosiveness.

Further, the bearing devices are sleeved at the two ends of the roller shaft, which are positioned at the two ends of the roller shaft; the bearing device comprises a bearing piece sleeved on the roller shaft and a bearing seat sleeved outside the bearing piece; the bearing pedestal is internally provided with a mounting groove for mounting the bearing piece, and the outer wall of the bearing pedestal is contacted with the inner wall of the carrier roller barrel.

Preferably, the bearing member comprises a ball bearing.

Specifically, the bearing seat comprises a first installation part sleeved on the roller shaft, a second installation part used for installing the bearing piece and a third installation part capable of contacting with the roller shaft, which are sequentially arranged from inside to outside; the outer end face of the second installation part is concavely provided with the installation groove, so that the bearing piece is convenient to install, and a reinforcing wall is arranged between the third installation part and the second installation part, so that the strength of the bearing seat is enhanced, and the running stability of the bearing seat is improved.

Further, the inner wall part of the supporting roller is recessed to form an annular end face on the inner wall of the supporting roller, and the annular end face is propped against the inner side end face of the bearing seat; a first check ring is nested in the part of the roller shaft, which is positioned outside the bearing piece; and, the bearing roller axle is provided with the first annular draw-in groove that is used for the block first retaining ring.

Specifically, the annular end surface abuts against the inner side end surface of the third mounting portion so as to position the bearing seat; meanwhile, through the cooperation of the first check ring and the first annular clamping groove, the first check ring can be nested on the roller shaft to limit the axial movement of the roller shaft, so that the axial movement of the bearing device is limited, and the stability of the bearing device on the roller shaft is improved.

Further, the axial sealing devices sleeved on the roller shafts are respectively arranged at the two ends of the roller supporting shafts, so that the tightness between the two ends of the roller supporting shafts and the roller supporting shafts is achieved, dirt such as dust is prevented from entering the roller supporting shafts, and the running smoothness of the bearing device and the roller supporting shafts is affected.

Further, the axial sealing device comprises an outer sealing cover sleeved on the roller shaft and an inner sealing cover connected with the outer sealing cover, the outer wall of the inner sealing cover is in contact with the inner wall of the roller barrel, and a second check ring is nested in the portion, located outside the outer sealing cover, of the roller shaft; the carrier roller shaft is provided with a second annular clamping groove for clamping the second check ring; the outer sealing cover comprises a plurality of outer annular grooves which are arranged on the inner side of the outer sealing cover facing the carrier roller cylinder and gradually expand in diameter from inside to outside, and an outer sealing ring is formed between two adjacent outer annular grooves; the inner sealing cover comprises a plurality of inner annular grooves which are arranged on the outer side of the inner sealing cover and gradually expand in diameter from inside to outside, and an inner sealing ring is formed between two adjacent inner annular grooves; and, the outer seal ring can be relatively inserted into the inner annular groove, and the inner seal ring can be relatively inserted into the outer annular groove.

Specifically, the axial length of the outer sealing ring is smaller than the depth of the inner annular groove, and the axial length of the inner sealing ring is smaller than the depth of the outer annular groove; and moreover, the innermost outer sealing ring of the outer sealing cover is coated on the roller shaft, and a sealing ring is arranged between the outermost outer sealing ring of the outer sealing cover and the inner sealing ring of the inner sealing cover, which is close to the position, so that the sealing performance between the outer sealing cover and the inner sealing cover is improved, and the sealing performance between the outer sealing cover and the inner sealing cover is improved.

By adopting the scheme, the outer sealing cover and the inner sealing cover are oppositely arranged, so that double and symmetrical sealing is realized, the sealing performance is better, and the service life is greatly prolonged; meanwhile, through the cooperation of the second check ring and the second annular clamping groove, the second check ring can be nested on the roller shaft to limit the axial movement of the second check ring, so that the axial movement of the axial sealing device is limited, the stability of the axial sealing device on the roller shaft is improved, and the sealing performance is further improved.

Furthermore, the carrier roller is made of PA6 material, has the characteristics of high strength, stable thermal performance, small friction coefficient, low wear rate and the like, and has the remarkable advantages of salt corrosion resistance, wear resistance and service life compared with the conventional steel carrier roller; the belt conveyor has small moment of inertia, particularly for a long-distance belt conveyor, the motor load can be reduced, the energy consumption can be obviously reduced, a large amount of electric power is saved, and therefore the economic benefit can be improved.

Specifically, the monomer of PA6 is caprolactam, which is a high molecular compound polymerized by caprolactam; the composite material has high tensile strength, high compressive strength, high toughness, high mechanical strength and high shock and stress vibration absorbing capacity. Meanwhile, the PA6 is a high molecular compound, has certain corrosion resistance, and can keep higher chemical stability in the environments of salt solution, engine oil, gasoline and the like. PA6 has excellent fireproof and flame-retardant capability and meets V-0 level.

(III) beneficial effects

Compared with the prior art, the utility model designs a carrier roller for a conveyor,

(1) According to the utility model, the supporting ring is arranged in the carrier roller and is used for supporting the carrier roller, so that the bearing capacity of the carrier roller is improved;

(2) The bearing device can improve the smoothness of relative rotation between the carrier roller cylinder and the carrier roller shaft; the rolling smoothness of the supporting roller is improved, so that the running efficiency of the conveyor is improved;

(3) The two supporting rings which are arranged at intervals are arranged in the supporting roller, so that the whole supporting roller can uniformly bear the pressure applied to the surface of the supporting roller, and stress peaks at individual parts are avoided, thereby reducing the probability of stress concentration phenomenon, greatly prolonging the service life, and simultaneously, stabilizing the supporting roller in the working conditions of continuous high-speed operation and strong corrosiveness;

(4) According to the utility model, the axial sealing devices sleeved on the carrier roller shafts are respectively arranged at the two ends of the carrier roller barrel, so that the tightness between the two ends of the carrier roller barrel and the carrier roller shafts is realized, dust and other dirt are prevented from entering the carrier roller barrel, and the running smoothness of the bearing device and the carrier roller is affected;

(5) The outer sealing cover and the inner sealing cover are oppositely arranged, so that double and symmetrical sealing is realized, the sealing performance is better, and the service life is greatly prolonged;

(6) According to the utility model, through the cooperation of the first check ring and the first annular clamping groove, the first check ring can be nested on the carrier roller shaft to limit the axial movement of the carrier roller shaft, so that the axial movement of the bearing device is limited, and the stability of the bearing device on the carrier roller shaft is improved; the second retainer ring is nested on the roller shaft through the cooperation of the second retainer ring and the second annular clamping groove, so that the axial movement of the second retainer ring is limited, the axial movement of the axial sealing device is limited, the stability of the axial sealing device on the roller shaft is improved, and the tightness is further improved;

(7) The carrier roller is made of PA6 material, has the characteristics of high strength, stable thermal performance, small friction coefficient, low wear rate and the like, and has the remarkable advantages of salt corrosion resistance, wear resistance and service life compared with the conventional steel carrier roller; the belt conveyor has small moment of inertia, particularly for a long-distance belt conveyor, the motor load can be reduced, the energy consumption can be obviously reduced, a large amount of electric power is saved, and therefore the economic benefit can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a structure of a carrier roller for a conveyor according to the present utility model;

Fig. 2 is a cut-away view of a carrier roller for a conveyor in accordance with the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is an enlarged schematic view of FIG. 2B;

FIG. 5 is an enlarged schematic view of FIG. 2 at C;

FIG. 6 is a schematic view of a support ring of the present utility model;

FIG. 7 is a cross-sectional view of a bearing assembly of the present utility model;

FIG. 8 is an exploded view of the axial seal device of the present utility model;

FIG. 9 is a schematic view of an external seal cap of the present utility model.

The corresponding component names for each reference number in the figures are: 1. a roller shaft; 11. the first annular clamping groove; 12. the second annular clamping groove; 2. a roller; 21. an annular end face; 3. a bearing device; 31. a bearing member; 32. a bearing seat; 321. a mounting groove; 322. a first mounting portion; 323. a second mounting portion; 324. a third mounting portion; 325. a reinforcing wall; 4. a support ring; 41. an inner ring portion; 411. a through hole; 42. an outer ring portion; 43. a connection part; 431. a groove; 44. reinforcing ribs; 5. a first retainer ring; 6. an axial sealing device; 61. an outer seal cap; 611. an outer annular groove; 612. an outer seal ring; 62. an inner sealing cover; 621. an inner annular groove; 622. an inner seal ring; 7. the second check ring; 8. and (3) sealing rings.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, apparatus may be implemented and/or methods practiced using any number and aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details.

The following describes the technical scheme provided by each embodiment of the present application with reference to the accompanying drawings.

This embodiment:

As shown in fig. 1 to 9, a carrier roller for a conveyor of the present embodiment includes a carrier roller shaft 1, a carrier roller tube 2 sleeved outside the carrier roller shaft 1, and a bearing device 3 provided between the carrier roller shaft 1 and the carrier roller tube 2; the carrier roller shaft 1 and the carrier roller cylinder 2 can rotate relatively; the part of the carrier roller shaft 1 in the carrier roller barrel 2 is sleeved with two supporting rings 4 used for supporting the carrier roller barrel 2, the supporting rings 4 are in a circular ring shape, and the outer walls of the supporting rings 4 are abutted against the inner walls of the carrier roller barrel 2, so that the supporting rings 4 can do relative rotation movement along with the carrier roller barrel 2. By adopting the scheme, the supporting ring 4 is arranged in the carrier roller barrel 2 and is used for supporting the carrier roller barrel 2, so that the bearing capacity of the carrier roller barrel 2 is improved; the arrangement of the bearing device 3 can improve the smoothness of the relative rotation between the carrier roller cylinder 2 and the carrier roller shaft 1; the rolling smoothness of the supporting roller 2 is improved, so that the running efficiency of the conveyor is improved. Further, the support ring 4 includes an inner ring portion 41 and an outer ring portion 42 coaxially provided, and a connecting portion 43 connected between the inner ring portion 41 and the outer ring portion 42; a through hole 411 through which the roller shaft 1 passes is formed in the inner ring portion 41, and the hole diameter of the through hole 411 is larger than the shaft diameter of the roller shaft 1. In some embodiments, the two ends of the connecting portion 43 along the axial direction are provided with a plurality of grooves 431 at intervals along the circumferential direction thereof. Specifically, a plurality of reinforcing ribs 44 are formed between two adjacent grooves 431, and the reinforcing ribs 44 are uniformly distributed circumferentially; two ends of the reinforcing rib 44 are respectively connected with the inner ring portion 41 and the outer ring portion 42, and an end surface between the two ends is connected with the connecting portion 43; to increase the strength of the support ring 4, thereby increasing the support strength of the support ring 4; at the same time, the provision of the recess 431 can reduce the weight of the support ring 4 and reduce the production cost. In some embodiments, the number of the supporting rings 4 is two and is arranged at intervals. In some embodiments, the spacing between two of the support rings 4 is 200mm. By adopting the scheme, the two support rings 4 are arranged at intervals, so that the whole carrier roller can uniformly bear the pressure applied to the surface of the carrier roller, stress peaks at individual positions are avoided, the probability of occurrence of stress concentration is reduced, the service life is greatly prolonged, and meanwhile, the carrier roller can be stabilized in the working conditions of continuous high-speed operation and strong corrosiveness.

In some embodiments, the bearing devices 3 are sleeved on the two ends of the carrier roller shaft 1 at the two ends of the carrier roller barrel 2; the bearing device 3 comprises a bearing piece 31 sleeved on the carrier roller shaft 1 and a bearing seat 32 sleeved outside the bearing piece 31; the bearing block 32 is internally provided with a mounting groove 321 for mounting the bearing piece 31, and the outer wall of the bearing block 32 is contacted with the inner wall of the carrier roller tube 2. Preferably, the bearing member 31 comprises a ball bearing. Specifically, the bearing seat 32 includes a first mounting portion 322 sleeved on the carrier roller shaft 1, a second mounting portion 323 for mounting the bearing member 31, and a third mounting portion 324 capable of contacting with the carrier roller tube 2, which are sequentially arranged from inside to outside; the second mounting portion 323 has an inner recess formed in an outer end surface thereof with the mounting groove 321 for facilitating mounting of the bearing member 31, and a reinforcing wall 325 is provided between the third mounting portion 324 and the second mounting portion 323 to enhance the strength of the bearing housing 32 and to enhance the running stability thereof. In some embodiments, the inner wall portion of the idler roller 2 is recessed to form an annular end face 21 on the inner wall thereof, the annular end face 21 abutting against the inner side end face of the bearing housing 32; a first check ring 5 is nested in the part of the carrier roller shaft 1 positioned outside the bearing piece 31; the carrier roller shaft 1 is provided with a first annular engaging groove 11 for engaging the first retainer ring 5. Specifically, the annular end surface 21 abuts against the inner end surface of the third mounting portion 324 so as to position the bearing housing 32; meanwhile, through the cooperation of the first retainer ring 5 and the first annular clamping groove 11, the first retainer ring 5 can be nested on the carrier roller shaft 1 to limit the axial movement of the carrier roller shaft 1, so that the axial movement of the bearing device 3 is limited, and the stability of the bearing device 3 on the carrier roller shaft 1 is improved.

In some embodiments, the two ends of the carrier roller cylinder 2 are respectively provided with an axial sealing device 6 sleeved on the carrier roller shaft 1, so that the tightness between the two ends of the carrier roller cylinder 2 and the carrier roller shaft 1 is achieved, dirt such as dust is prevented from entering the carrier roller cylinder 2, and the running smoothness of the bearing device 3 and the carrier roller is affected. In some embodiments, the axial sealing device 6 comprises an outer sealing cover 61 sleeved on the carrier roller shaft 1 and an inner sealing cover 62 connected with the outer sealing cover 61, the outer wall of the inner sealing cover 62 is in contact with the inner wall of the carrier roller tube 2, and a second check ring 7 is nested in the part of the carrier roller shaft 1 positioned outside the outer sealing cover 61; the carrier roller shaft 1 is provided with a second annular clamping groove 12 for clamping the second check ring 7; wherein the outer seal cover 61 comprises a plurality of outer annular grooves 611 which are arranged on the inner side facing the inside of the carrier roller tube 2 and gradually expand in diameter from inside to outside, and an outer seal ring 612 is formed between two adjacent outer annular grooves 611; the inner sealing cover 62 includes a plurality of inner annular grooves 621 provided on the outer side thereof and gradually enlarged in diameter from the inside to the outside, and an inner sealing ring 622 is formed between adjacent two of the inner annular grooves 621; and, the outer seal ring 612 can be relatively inserted into the inner annular groove 621, and the inner seal ring 622 can be relatively inserted into the outer annular groove 611. Specifically, the axial length of the outer seal ring 612 is smaller than the depth of the inner annular groove 621, and the axial length of the inner seal ring 622 is smaller than the depth of the outer annular groove 611, so that the above structure can avoid the assembly in place and thus lose the sealing function; and, the innermost outer sealing ring 612 of the outer sealing cover 61 is coated on the roller shaft 1, and a sealing ring 8 is arranged between the outermost outer sealing ring 612 of the outer sealing cover 61 and the inner sealing ring 622 of the inner sealing cover 62 close to the place, so as to improve the tightness between the two, thereby improving the tightness between the outer sealing cover 61 and the inner sealing cover 62. By adopting the scheme, the outer sealing cover 61 and the inner sealing cover 62 are oppositely arranged, so that double and symmetrical sealing is realized, the sealing performance is better, and the service life is greatly prolonged; meanwhile, through the cooperation of the second retainer ring 7 and the second annular clamping groove 12, the second retainer ring 7 can be nested on the carrier roller shaft 1 to limit the axial movement of the second retainer ring, so that the axial movement of the axial sealing device 6 is limited, the stability of the axial sealing device 6 on the carrier roller shaft 1 is improved, and the sealing performance is further improved.

In some embodiments, the carrier roller is made of PA6 material, has the characteristics of high strength, stable thermal performance, small friction coefficient, low wear rate and the like, and has remarkable advantages of salt corrosion resistance, wear resistance and service life compared with the conventional steel carrier roller; the belt conveyor has small moment of inertia, particularly for a long-distance belt conveyor, the motor load can be reduced, the energy consumption can be obviously reduced, a large amount of electric power is saved, and therefore the economic benefit can be improved. Specifically, the monomer of PA6 is caprolactam, which is a high molecular compound polymerized by caprolactam; the composite material has high tensile strength, high compressive strength, high toughness, high mechanical strength and high shock and stress vibration absorbing capacity. Meanwhile, the PA6 is a high molecular compound, has certain corrosion resistance, and can keep higher chemical stability in the environments of salt solution, engine oil, gasoline and the like. PA6 has excellent fireproof and flame-retardant capability and meets V-0 level.

The same and similar parts of the embodiments in this specification are all referred to each other, and each embodiment focuses on the differences from the other embodiments.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (10)

1. A carrier roller for a conveyor, characterized by: the carrier roller comprises a carrier roller shaft (1), a carrier roller cylinder (2) sleeved outside the carrier roller shaft (1), and a bearing device (3) arranged between the carrier roller shaft (1) and the carrier roller cylinder (2); the carrier roller shaft (1) and the carrier roller cylinder (2) can rotate relatively; the support roller is characterized in that at least one support ring (4) used for supporting the support roller tube (2) is sleeved on the part, located in the support roller tube (2), of the support roller shaft (1), the support ring (4) is in a circular ring shape, and the outer wall of the support ring (4) is abutted to the inner wall of the support roller tube (2).

2. Idler for a conveyor according to claim 1, characterized in that: the support ring (4) comprises an inner ring part (41) and an outer ring part (42) which are coaxially arranged, and a connecting part (43) connected between the inner ring part (41) and the outer ring part (42); a through hole (411) for the carrier roller shaft (1) to pass through is formed in the inner ring part (41), and the aperture of the through hole (411) is larger than the shaft diameter of the carrier roller shaft (1).

3. Idler for a conveyor according to claim 2, characterized in that: the connecting portion (43) is provided with a plurality of grooves (431) at intervals along the circumferential direction thereof along both ends in the axial direction.

4. Idler for a conveyor according to claim 1, characterized in that: the number of the supporting rings (4) is two, and the supporting rings are arranged at intervals.

5. A carrier roller for a conveyor as in claim 4 wherein: the distance between the two support rings (4) is 200mm.

6. Idler for a conveyor according to claim 1, characterized in that: the bearing devices (3) are sleeved at the two ends of the carrier roller shaft (1) positioned at the carrier roller barrel (2); the bearing device (3) comprises a bearing piece (31) sleeved on the carrier roller shaft (1) and a bearing seat (32) sleeved outside the bearing piece (31); the bearing support (32) is internally provided with a mounting groove (321) for mounting the bearing piece (31), and the outer wall of the bearing support (32) is contacted with the inner wall of the carrier roller tube (2).

7. The idler for a conveyor as in claim 6 wherein: the inner wall part of the carrier roller cylinder (2) is recessed to form an annular end surface (21) on the inner wall of the carrier roller cylinder, and the annular end surface (21) is propped against the inner side end surface of the bearing seat (32); a first check ring (5) is nested at the part of the carrier roller shaft (1) positioned outside the bearing piece (31); and, the idler shaft (1) is provided with a first annular clamping groove (11) for clamping the first check ring (5).

8. Idler for a conveyor according to claim 1, characterized in that: the two ends of the carrier roller tube (2) are respectively provided with an axial sealing device (6) sleeved on the carrier roller shaft (1).

9. A carrier roller for a conveyor as in claim 8 wherein: the axial sealing device (6) comprises an outer sealing cover (61) sleeved on the carrier roller shaft (1) and an inner sealing cover (62) connected with the outer sealing cover (61), the outer wall of the inner sealing cover (62) is contacted with the inner wall of the carrier roller cylinder (2), and a second check ring (7) is nested at the part of the carrier roller shaft (1) positioned outside the outer sealing cover (61); the carrier roller shaft (1) is provided with a second annular clamping groove (12) for clamping the second check ring (7); wherein the outer sealing cover (61) comprises a plurality of outer annular grooves (611) which are arranged on the inner side facing the inside of the carrier roller tube (2) and gradually expand in diameter from inside to outside, and an outer sealing ring (612) is formed between two adjacent outer annular grooves (611); the inner sealing cover (62) comprises a plurality of inner annular grooves (621) which are arranged on the outer side of the inner sealing cover and gradually expand from inside to outside, and an inner sealing ring (622) is formed between two adjacent inner annular grooves (621); and, the outer seal ring (612) can be relatively inserted into the inner annular groove (621), and the inner seal ring (622) can be relatively inserted into the outer annular groove (611).

10. Idler for a conveyor according to claim 1, characterized in that: the carrier roller is made of PA6 material.